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smb/server: adapt to breakup of struct file_lock
[thirdparty/linux.git] / fs / smb / server / smb2pdu.c
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (C) 2016 Namjae Jeon <linkinjeon@kernel.org>
4 * Copyright (C) 2018 Samsung Electronics Co., Ltd.
5 */
6
7 #include <linux/inetdevice.h>
8 #include <net/addrconf.h>
9 #include <linux/syscalls.h>
10 #include <linux/namei.h>
11 #include <linux/statfs.h>
12 #include <linux/ethtool.h>
13 #include <linux/falloc.h>
14 #include <linux/mount.h>
15 #include <linux/filelock.h>
16
17 #include "glob.h"
18 #include "smbfsctl.h"
19 #include "oplock.h"
20 #include "smbacl.h"
21
22 #include "auth.h"
23 #include "asn1.h"
24 #include "connection.h"
25 #include "transport_ipc.h"
26 #include "transport_rdma.h"
27 #include "vfs.h"
28 #include "vfs_cache.h"
29 #include "misc.h"
30
31 #include "server.h"
32 #include "smb_common.h"
33 #include "smbstatus.h"
34 #include "ksmbd_work.h"
35 #include "mgmt/user_config.h"
36 #include "mgmt/share_config.h"
37 #include "mgmt/tree_connect.h"
38 #include "mgmt/user_session.h"
39 #include "mgmt/ksmbd_ida.h"
40 #include "ndr.h"
41
42 static void __wbuf(struct ksmbd_work *work, void **req, void **rsp)
43 {
44 if (work->next_smb2_rcv_hdr_off) {
45 *req = ksmbd_req_buf_next(work);
46 *rsp = ksmbd_resp_buf_next(work);
47 } else {
48 *req = smb2_get_msg(work->request_buf);
49 *rsp = smb2_get_msg(work->response_buf);
50 }
51 }
52
53 #define WORK_BUFFERS(w, rq, rs) __wbuf((w), (void **)&(rq), (void **)&(rs))
54
55 /**
56 * check_session_id() - check for valid session id in smb header
57 * @conn: connection instance
58 * @id: session id from smb header
59 *
60 * Return: 1 if valid session id, otherwise 0
61 */
62 static inline bool check_session_id(struct ksmbd_conn *conn, u64 id)
63 {
64 struct ksmbd_session *sess;
65
66 if (id == 0 || id == -1)
67 return false;
68
69 sess = ksmbd_session_lookup_all(conn, id);
70 if (sess)
71 return true;
72 pr_err("Invalid user session id: %llu\n", id);
73 return false;
74 }
75
76 struct channel *lookup_chann_list(struct ksmbd_session *sess, struct ksmbd_conn *conn)
77 {
78 return xa_load(&sess->ksmbd_chann_list, (long)conn);
79 }
80
81 /**
82 * smb2_get_ksmbd_tcon() - get tree connection information using a tree id.
83 * @work: smb work
84 *
85 * Return: 0 if there is a tree connection matched or these are
86 * skipable commands, otherwise error
87 */
88 int smb2_get_ksmbd_tcon(struct ksmbd_work *work)
89 {
90 struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work);
91 unsigned int cmd = le16_to_cpu(req_hdr->Command);
92 unsigned int tree_id;
93
94 if (cmd == SMB2_TREE_CONNECT_HE ||
95 cmd == SMB2_CANCEL_HE ||
96 cmd == SMB2_LOGOFF_HE) {
97 ksmbd_debug(SMB, "skip to check tree connect request\n");
98 return 0;
99 }
100
101 if (xa_empty(&work->sess->tree_conns)) {
102 ksmbd_debug(SMB, "NO tree connected\n");
103 return -ENOENT;
104 }
105
106 tree_id = le32_to_cpu(req_hdr->Id.SyncId.TreeId);
107
108 /*
109 * If request is not the first in Compound request,
110 * Just validate tree id in header with work->tcon->id.
111 */
112 if (work->next_smb2_rcv_hdr_off) {
113 if (!work->tcon) {
114 pr_err("The first operation in the compound does not have tcon\n");
115 return -EINVAL;
116 }
117 if (tree_id != UINT_MAX && work->tcon->id != tree_id) {
118 pr_err("tree id(%u) is different with id(%u) in first operation\n",
119 tree_id, work->tcon->id);
120 return -EINVAL;
121 }
122 return 1;
123 }
124
125 work->tcon = ksmbd_tree_conn_lookup(work->sess, tree_id);
126 if (!work->tcon) {
127 pr_err("Invalid tid %d\n", tree_id);
128 return -ENOENT;
129 }
130
131 return 1;
132 }
133
134 /**
135 * smb2_set_err_rsp() - set error response code on smb response
136 * @work: smb work containing response buffer
137 */
138 void smb2_set_err_rsp(struct ksmbd_work *work)
139 {
140 struct smb2_err_rsp *err_rsp;
141
142 if (work->next_smb2_rcv_hdr_off)
143 err_rsp = ksmbd_resp_buf_next(work);
144 else
145 err_rsp = smb2_get_msg(work->response_buf);
146
147 if (err_rsp->hdr.Status != STATUS_STOPPED_ON_SYMLINK) {
148 int err;
149
150 err_rsp->StructureSize = SMB2_ERROR_STRUCTURE_SIZE2_LE;
151 err_rsp->ErrorContextCount = 0;
152 err_rsp->Reserved = 0;
153 err_rsp->ByteCount = 0;
154 err_rsp->ErrorData[0] = 0;
155 err = ksmbd_iov_pin_rsp(work, (void *)err_rsp,
156 __SMB2_HEADER_STRUCTURE_SIZE +
157 SMB2_ERROR_STRUCTURE_SIZE2);
158 if (err)
159 work->send_no_response = 1;
160 }
161 }
162
163 /**
164 * is_smb2_neg_cmd() - is it smb2 negotiation command
165 * @work: smb work containing smb header
166 *
167 * Return: true if smb2 negotiation command, otherwise false
168 */
169 bool is_smb2_neg_cmd(struct ksmbd_work *work)
170 {
171 struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
172
173 /* is it SMB2 header ? */
174 if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
175 return false;
176
177 /* make sure it is request not response message */
178 if (hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR)
179 return false;
180
181 if (hdr->Command != SMB2_NEGOTIATE)
182 return false;
183
184 return true;
185 }
186
187 /**
188 * is_smb2_rsp() - is it smb2 response
189 * @work: smb work containing smb response buffer
190 *
191 * Return: true if smb2 response, otherwise false
192 */
193 bool is_smb2_rsp(struct ksmbd_work *work)
194 {
195 struct smb2_hdr *hdr = smb2_get_msg(work->response_buf);
196
197 /* is it SMB2 header ? */
198 if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
199 return false;
200
201 /* make sure it is response not request message */
202 if (!(hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR))
203 return false;
204
205 return true;
206 }
207
208 /**
209 * get_smb2_cmd_val() - get smb command code from smb header
210 * @work: smb work containing smb request buffer
211 *
212 * Return: smb2 request command value
213 */
214 u16 get_smb2_cmd_val(struct ksmbd_work *work)
215 {
216 struct smb2_hdr *rcv_hdr;
217
218 if (work->next_smb2_rcv_hdr_off)
219 rcv_hdr = ksmbd_req_buf_next(work);
220 else
221 rcv_hdr = smb2_get_msg(work->request_buf);
222 return le16_to_cpu(rcv_hdr->Command);
223 }
224
225 /**
226 * set_smb2_rsp_status() - set error response code on smb2 header
227 * @work: smb work containing response buffer
228 * @err: error response code
229 */
230 void set_smb2_rsp_status(struct ksmbd_work *work, __le32 err)
231 {
232 struct smb2_hdr *rsp_hdr;
233
234 rsp_hdr = smb2_get_msg(work->response_buf);
235 rsp_hdr->Status = err;
236
237 work->iov_idx = 0;
238 work->iov_cnt = 0;
239 work->next_smb2_rcv_hdr_off = 0;
240 smb2_set_err_rsp(work);
241 }
242
243 /**
244 * init_smb2_neg_rsp() - initialize smb2 response for negotiate command
245 * @work: smb work containing smb request buffer
246 *
247 * smb2 negotiate response is sent in reply of smb1 negotiate command for
248 * dialect auto-negotiation.
249 */
250 int init_smb2_neg_rsp(struct ksmbd_work *work)
251 {
252 struct smb2_hdr *rsp_hdr;
253 struct smb2_negotiate_rsp *rsp;
254 struct ksmbd_conn *conn = work->conn;
255 int err;
256
257 rsp_hdr = smb2_get_msg(work->response_buf);
258 memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
259 rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER;
260 rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
261 rsp_hdr->CreditRequest = cpu_to_le16(2);
262 rsp_hdr->Command = SMB2_NEGOTIATE;
263 rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR);
264 rsp_hdr->NextCommand = 0;
265 rsp_hdr->MessageId = 0;
266 rsp_hdr->Id.SyncId.ProcessId = 0;
267 rsp_hdr->Id.SyncId.TreeId = 0;
268 rsp_hdr->SessionId = 0;
269 memset(rsp_hdr->Signature, 0, 16);
270
271 rsp = smb2_get_msg(work->response_buf);
272
273 WARN_ON(ksmbd_conn_good(conn));
274
275 rsp->StructureSize = cpu_to_le16(65);
276 ksmbd_debug(SMB, "conn->dialect 0x%x\n", conn->dialect);
277 rsp->DialectRevision = cpu_to_le16(conn->dialect);
278 /* Not setting conn guid rsp->ServerGUID, as it
279 * not used by client for identifying connection
280 */
281 rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
282 /* Default Max Message Size till SMB2.0, 64K*/
283 rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size);
284 rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size);
285 rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size);
286
287 rsp->SystemTime = cpu_to_le64(ksmbd_systime());
288 rsp->ServerStartTime = 0;
289
290 rsp->SecurityBufferOffset = cpu_to_le16(128);
291 rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH);
292 ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) +
293 le16_to_cpu(rsp->SecurityBufferOffset));
294 rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE;
295 if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY)
296 rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE;
297 err = ksmbd_iov_pin_rsp(work, rsp,
298 sizeof(struct smb2_negotiate_rsp) + AUTH_GSS_LENGTH);
299 if (err)
300 return err;
301 conn->use_spnego = true;
302
303 ksmbd_conn_set_need_negotiate(conn);
304 return 0;
305 }
306
307 /**
308 * smb2_set_rsp_credits() - set number of credits in response buffer
309 * @work: smb work containing smb response buffer
310 */
311 int smb2_set_rsp_credits(struct ksmbd_work *work)
312 {
313 struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work);
314 struct smb2_hdr *hdr = ksmbd_resp_buf_next(work);
315 struct ksmbd_conn *conn = work->conn;
316 unsigned short credits_requested, aux_max;
317 unsigned short credit_charge, credits_granted = 0;
318
319 if (work->send_no_response)
320 return 0;
321
322 hdr->CreditCharge = req_hdr->CreditCharge;
323
324 if (conn->total_credits > conn->vals->max_credits) {
325 hdr->CreditRequest = 0;
326 pr_err("Total credits overflow: %d\n", conn->total_credits);
327 return -EINVAL;
328 }
329
330 credit_charge = max_t(unsigned short,
331 le16_to_cpu(req_hdr->CreditCharge), 1);
332 if (credit_charge > conn->total_credits) {
333 ksmbd_debug(SMB, "Insufficient credits granted, given: %u, granted: %u\n",
334 credit_charge, conn->total_credits);
335 return -EINVAL;
336 }
337
338 conn->total_credits -= credit_charge;
339 conn->outstanding_credits -= credit_charge;
340 credits_requested = max_t(unsigned short,
341 le16_to_cpu(req_hdr->CreditRequest), 1);
342
343 /* according to smb2.credits smbtorture, Windows server
344 * 2016 or later grant up to 8192 credits at once.
345 *
346 * TODO: Need to adjuct CreditRequest value according to
347 * current cpu load
348 */
349 if (hdr->Command == SMB2_NEGOTIATE)
350 aux_max = 1;
351 else
352 aux_max = conn->vals->max_credits - conn->total_credits;
353 credits_granted = min_t(unsigned short, credits_requested, aux_max);
354
355 conn->total_credits += credits_granted;
356 work->credits_granted += credits_granted;
357
358 if (!req_hdr->NextCommand) {
359 /* Update CreditRequest in last request */
360 hdr->CreditRequest = cpu_to_le16(work->credits_granted);
361 }
362 ksmbd_debug(SMB,
363 "credits: requested[%d] granted[%d] total_granted[%d]\n",
364 credits_requested, credits_granted,
365 conn->total_credits);
366 return 0;
367 }
368
369 /**
370 * init_chained_smb2_rsp() - initialize smb2 chained response
371 * @work: smb work containing smb response buffer
372 */
373 static void init_chained_smb2_rsp(struct ksmbd_work *work)
374 {
375 struct smb2_hdr *req = ksmbd_req_buf_next(work);
376 struct smb2_hdr *rsp = ksmbd_resp_buf_next(work);
377 struct smb2_hdr *rsp_hdr;
378 struct smb2_hdr *rcv_hdr;
379 int next_hdr_offset = 0;
380 int len, new_len;
381
382 /* Len of this response = updated RFC len - offset of previous cmd
383 * in the compound rsp
384 */
385
386 /* Storing the current local FID which may be needed by subsequent
387 * command in the compound request
388 */
389 if (req->Command == SMB2_CREATE && rsp->Status == STATUS_SUCCESS) {
390 work->compound_fid = ((struct smb2_create_rsp *)rsp)->VolatileFileId;
391 work->compound_pfid = ((struct smb2_create_rsp *)rsp)->PersistentFileId;
392 work->compound_sid = le64_to_cpu(rsp->SessionId);
393 }
394
395 len = get_rfc1002_len(work->response_buf) - work->next_smb2_rsp_hdr_off;
396 next_hdr_offset = le32_to_cpu(req->NextCommand);
397
398 new_len = ALIGN(len, 8);
399 work->iov[work->iov_idx].iov_len += (new_len - len);
400 inc_rfc1001_len(work->response_buf, new_len - len);
401 rsp->NextCommand = cpu_to_le32(new_len);
402
403 work->next_smb2_rcv_hdr_off += next_hdr_offset;
404 work->curr_smb2_rsp_hdr_off = work->next_smb2_rsp_hdr_off;
405 work->next_smb2_rsp_hdr_off += new_len;
406 ksmbd_debug(SMB,
407 "Compound req new_len = %d rcv off = %d rsp off = %d\n",
408 new_len, work->next_smb2_rcv_hdr_off,
409 work->next_smb2_rsp_hdr_off);
410
411 rsp_hdr = ksmbd_resp_buf_next(work);
412 rcv_hdr = ksmbd_req_buf_next(work);
413
414 if (!(rcv_hdr->Flags & SMB2_FLAGS_RELATED_OPERATIONS)) {
415 ksmbd_debug(SMB, "related flag should be set\n");
416 work->compound_fid = KSMBD_NO_FID;
417 work->compound_pfid = KSMBD_NO_FID;
418 }
419 memset((char *)rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
420 rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER;
421 rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
422 rsp_hdr->Command = rcv_hdr->Command;
423
424 /*
425 * Message is response. We don't grant oplock yet.
426 */
427 rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR |
428 SMB2_FLAGS_RELATED_OPERATIONS);
429 rsp_hdr->NextCommand = 0;
430 rsp_hdr->MessageId = rcv_hdr->MessageId;
431 rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId;
432 rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId;
433 rsp_hdr->SessionId = rcv_hdr->SessionId;
434 memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16);
435 }
436
437 /**
438 * is_chained_smb2_message() - check for chained command
439 * @work: smb work containing smb request buffer
440 *
441 * Return: true if chained request, otherwise false
442 */
443 bool is_chained_smb2_message(struct ksmbd_work *work)
444 {
445 struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
446 unsigned int len, next_cmd;
447
448 if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
449 return false;
450
451 hdr = ksmbd_req_buf_next(work);
452 next_cmd = le32_to_cpu(hdr->NextCommand);
453 if (next_cmd > 0) {
454 if ((u64)work->next_smb2_rcv_hdr_off + next_cmd +
455 __SMB2_HEADER_STRUCTURE_SIZE >
456 get_rfc1002_len(work->request_buf)) {
457 pr_err("next command(%u) offset exceeds smb msg size\n",
458 next_cmd);
459 return false;
460 }
461
462 if ((u64)get_rfc1002_len(work->response_buf) + MAX_CIFS_SMALL_BUFFER_SIZE >
463 work->response_sz) {
464 pr_err("next response offset exceeds response buffer size\n");
465 return false;
466 }
467
468 ksmbd_debug(SMB, "got SMB2 chained command\n");
469 init_chained_smb2_rsp(work);
470 return true;
471 } else if (work->next_smb2_rcv_hdr_off) {
472 /*
473 * This is last request in chained command,
474 * align response to 8 byte
475 */
476 len = ALIGN(get_rfc1002_len(work->response_buf), 8);
477 len = len - get_rfc1002_len(work->response_buf);
478 if (len) {
479 ksmbd_debug(SMB, "padding len %u\n", len);
480 work->iov[work->iov_idx].iov_len += len;
481 inc_rfc1001_len(work->response_buf, len);
482 }
483 work->curr_smb2_rsp_hdr_off = work->next_smb2_rsp_hdr_off;
484 }
485 return false;
486 }
487
488 /**
489 * init_smb2_rsp_hdr() - initialize smb2 response
490 * @work: smb work containing smb request buffer
491 *
492 * Return: 0
493 */
494 int init_smb2_rsp_hdr(struct ksmbd_work *work)
495 {
496 struct smb2_hdr *rsp_hdr = smb2_get_msg(work->response_buf);
497 struct smb2_hdr *rcv_hdr = smb2_get_msg(work->request_buf);
498
499 memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
500 rsp_hdr->ProtocolId = rcv_hdr->ProtocolId;
501 rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
502 rsp_hdr->Command = rcv_hdr->Command;
503
504 /*
505 * Message is response. We don't grant oplock yet.
506 */
507 rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR);
508 rsp_hdr->NextCommand = 0;
509 rsp_hdr->MessageId = rcv_hdr->MessageId;
510 rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId;
511 rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId;
512 rsp_hdr->SessionId = rcv_hdr->SessionId;
513 memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16);
514
515 return 0;
516 }
517
518 /**
519 * smb2_allocate_rsp_buf() - allocate smb2 response buffer
520 * @work: smb work containing smb request buffer
521 *
522 * Return: 0 on success, otherwise -ENOMEM
523 */
524 int smb2_allocate_rsp_buf(struct ksmbd_work *work)
525 {
526 struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
527 size_t small_sz = MAX_CIFS_SMALL_BUFFER_SIZE;
528 size_t large_sz = small_sz + work->conn->vals->max_trans_size;
529 size_t sz = small_sz;
530 int cmd = le16_to_cpu(hdr->Command);
531
532 if (cmd == SMB2_IOCTL_HE || cmd == SMB2_QUERY_DIRECTORY_HE)
533 sz = large_sz;
534
535 if (cmd == SMB2_QUERY_INFO_HE) {
536 struct smb2_query_info_req *req;
537
538 req = smb2_get_msg(work->request_buf);
539 if ((req->InfoType == SMB2_O_INFO_FILE &&
540 (req->FileInfoClass == FILE_FULL_EA_INFORMATION ||
541 req->FileInfoClass == FILE_ALL_INFORMATION)) ||
542 req->InfoType == SMB2_O_INFO_SECURITY)
543 sz = large_sz;
544 }
545
546 /* allocate large response buf for chained commands */
547 if (le32_to_cpu(hdr->NextCommand) > 0)
548 sz = large_sz;
549
550 work->response_buf = kvzalloc(sz, GFP_KERNEL);
551 if (!work->response_buf)
552 return -ENOMEM;
553
554 work->response_sz = sz;
555 return 0;
556 }
557
558 /**
559 * smb2_check_user_session() - check for valid session for a user
560 * @work: smb work containing smb request buffer
561 *
562 * Return: 0 on success, otherwise error
563 */
564 int smb2_check_user_session(struct ksmbd_work *work)
565 {
566 struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work);
567 struct ksmbd_conn *conn = work->conn;
568 unsigned int cmd = le16_to_cpu(req_hdr->Command);
569 unsigned long long sess_id;
570
571 /*
572 * SMB2_ECHO, SMB2_NEGOTIATE, SMB2_SESSION_SETUP command do not
573 * require a session id, so no need to validate user session's for
574 * these commands.
575 */
576 if (cmd == SMB2_ECHO_HE || cmd == SMB2_NEGOTIATE_HE ||
577 cmd == SMB2_SESSION_SETUP_HE)
578 return 0;
579
580 if (!ksmbd_conn_good(conn))
581 return -EIO;
582
583 sess_id = le64_to_cpu(req_hdr->SessionId);
584
585 /*
586 * If request is not the first in Compound request,
587 * Just validate session id in header with work->sess->id.
588 */
589 if (work->next_smb2_rcv_hdr_off) {
590 if (!work->sess) {
591 pr_err("The first operation in the compound does not have sess\n");
592 return -EINVAL;
593 }
594 if (sess_id != ULLONG_MAX && work->sess->id != sess_id) {
595 pr_err("session id(%llu) is different with the first operation(%lld)\n",
596 sess_id, work->sess->id);
597 return -EINVAL;
598 }
599 return 1;
600 }
601
602 /* Check for validity of user session */
603 work->sess = ksmbd_session_lookup_all(conn, sess_id);
604 if (work->sess)
605 return 1;
606 ksmbd_debug(SMB, "Invalid user session, Uid %llu\n", sess_id);
607 return -ENOENT;
608 }
609
610 static void destroy_previous_session(struct ksmbd_conn *conn,
611 struct ksmbd_user *user, u64 id)
612 {
613 struct ksmbd_session *prev_sess = ksmbd_session_lookup_slowpath(id);
614 struct ksmbd_user *prev_user;
615 struct channel *chann;
616 long index;
617
618 if (!prev_sess)
619 return;
620
621 prev_user = prev_sess->user;
622
623 if (!prev_user ||
624 strcmp(user->name, prev_user->name) ||
625 user->passkey_sz != prev_user->passkey_sz ||
626 memcmp(user->passkey, prev_user->passkey, user->passkey_sz))
627 return;
628
629 prev_sess->state = SMB2_SESSION_EXPIRED;
630 xa_for_each(&prev_sess->ksmbd_chann_list, index, chann)
631 ksmbd_conn_set_exiting(chann->conn);
632 }
633
634 /**
635 * smb2_get_name() - get filename string from on the wire smb format
636 * @src: source buffer
637 * @maxlen: maxlen of source string
638 * @local_nls: nls_table pointer
639 *
640 * Return: matching converted filename on success, otherwise error ptr
641 */
642 static char *
643 smb2_get_name(const char *src, const int maxlen, struct nls_table *local_nls)
644 {
645 char *name;
646
647 name = smb_strndup_from_utf16(src, maxlen, 1, local_nls);
648 if (IS_ERR(name)) {
649 pr_err("failed to get name %ld\n", PTR_ERR(name));
650 return name;
651 }
652
653 ksmbd_conv_path_to_unix(name);
654 ksmbd_strip_last_slash(name);
655 return name;
656 }
657
658 int setup_async_work(struct ksmbd_work *work, void (*fn)(void **), void **arg)
659 {
660 struct ksmbd_conn *conn = work->conn;
661 int id;
662
663 id = ksmbd_acquire_async_msg_id(&conn->async_ida);
664 if (id < 0) {
665 pr_err("Failed to alloc async message id\n");
666 return id;
667 }
668 work->asynchronous = true;
669 work->async_id = id;
670
671 ksmbd_debug(SMB,
672 "Send interim Response to inform async request id : %d\n",
673 work->async_id);
674
675 work->cancel_fn = fn;
676 work->cancel_argv = arg;
677
678 if (list_empty(&work->async_request_entry)) {
679 spin_lock(&conn->request_lock);
680 list_add_tail(&work->async_request_entry, &conn->async_requests);
681 spin_unlock(&conn->request_lock);
682 }
683
684 return 0;
685 }
686
687 void release_async_work(struct ksmbd_work *work)
688 {
689 struct ksmbd_conn *conn = work->conn;
690
691 spin_lock(&conn->request_lock);
692 list_del_init(&work->async_request_entry);
693 spin_unlock(&conn->request_lock);
694
695 work->asynchronous = 0;
696 work->cancel_fn = NULL;
697 kfree(work->cancel_argv);
698 work->cancel_argv = NULL;
699 if (work->async_id) {
700 ksmbd_release_id(&conn->async_ida, work->async_id);
701 work->async_id = 0;
702 }
703 }
704
705 void smb2_send_interim_resp(struct ksmbd_work *work, __le32 status)
706 {
707 struct smb2_hdr *rsp_hdr;
708 struct ksmbd_work *in_work = ksmbd_alloc_work_struct();
709
710 if (allocate_interim_rsp_buf(in_work)) {
711 pr_err("smb_allocate_rsp_buf failed!\n");
712 ksmbd_free_work_struct(in_work);
713 return;
714 }
715
716 in_work->conn = work->conn;
717 memcpy(smb2_get_msg(in_work->response_buf), ksmbd_resp_buf_next(work),
718 __SMB2_HEADER_STRUCTURE_SIZE);
719
720 rsp_hdr = smb2_get_msg(in_work->response_buf);
721 rsp_hdr->Flags |= SMB2_FLAGS_ASYNC_COMMAND;
722 rsp_hdr->Id.AsyncId = cpu_to_le64(work->async_id);
723 smb2_set_err_rsp(in_work);
724 rsp_hdr->Status = status;
725
726 ksmbd_conn_write(in_work);
727 ksmbd_free_work_struct(in_work);
728 }
729
730 static __le32 smb2_get_reparse_tag_special_file(umode_t mode)
731 {
732 if (S_ISDIR(mode) || S_ISREG(mode))
733 return 0;
734
735 if (S_ISLNK(mode))
736 return IO_REPARSE_TAG_LX_SYMLINK_LE;
737 else if (S_ISFIFO(mode))
738 return IO_REPARSE_TAG_LX_FIFO_LE;
739 else if (S_ISSOCK(mode))
740 return IO_REPARSE_TAG_AF_UNIX_LE;
741 else if (S_ISCHR(mode))
742 return IO_REPARSE_TAG_LX_CHR_LE;
743 else if (S_ISBLK(mode))
744 return IO_REPARSE_TAG_LX_BLK_LE;
745
746 return 0;
747 }
748
749 /**
750 * smb2_get_dos_mode() - get file mode in dos format from unix mode
751 * @stat: kstat containing file mode
752 * @attribute: attribute flags
753 *
754 * Return: converted dos mode
755 */
756 static int smb2_get_dos_mode(struct kstat *stat, int attribute)
757 {
758 int attr = 0;
759
760 if (S_ISDIR(stat->mode)) {
761 attr = FILE_ATTRIBUTE_DIRECTORY |
762 (attribute & (FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM));
763 } else {
764 attr = (attribute & 0x00005137) | FILE_ATTRIBUTE_ARCHIVE;
765 attr &= ~(FILE_ATTRIBUTE_DIRECTORY);
766 if (S_ISREG(stat->mode) && (server_conf.share_fake_fscaps &
767 FILE_SUPPORTS_SPARSE_FILES))
768 attr |= FILE_ATTRIBUTE_SPARSE_FILE;
769
770 if (smb2_get_reparse_tag_special_file(stat->mode))
771 attr |= FILE_ATTRIBUTE_REPARSE_POINT;
772 }
773
774 return attr;
775 }
776
777 static void build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt,
778 __le16 hash_id)
779 {
780 pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES;
781 pneg_ctxt->DataLength = cpu_to_le16(38);
782 pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1);
783 pneg_ctxt->Reserved = cpu_to_le32(0);
784 pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE);
785 get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE);
786 pneg_ctxt->HashAlgorithms = hash_id;
787 }
788
789 static void build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt,
790 __le16 cipher_type)
791 {
792 pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES;
793 pneg_ctxt->DataLength = cpu_to_le16(4);
794 pneg_ctxt->Reserved = cpu_to_le32(0);
795 pneg_ctxt->CipherCount = cpu_to_le16(1);
796 pneg_ctxt->Ciphers[0] = cipher_type;
797 }
798
799 static void build_sign_cap_ctxt(struct smb2_signing_capabilities *pneg_ctxt,
800 __le16 sign_algo)
801 {
802 pneg_ctxt->ContextType = SMB2_SIGNING_CAPABILITIES;
803 pneg_ctxt->DataLength =
804 cpu_to_le16((sizeof(struct smb2_signing_capabilities) + 2)
805 - sizeof(struct smb2_neg_context));
806 pneg_ctxt->Reserved = cpu_to_le32(0);
807 pneg_ctxt->SigningAlgorithmCount = cpu_to_le16(1);
808 pneg_ctxt->SigningAlgorithms[0] = sign_algo;
809 }
810
811 static void build_posix_ctxt(struct smb2_posix_neg_context *pneg_ctxt)
812 {
813 pneg_ctxt->ContextType = SMB2_POSIX_EXTENSIONS_AVAILABLE;
814 pneg_ctxt->DataLength = cpu_to_le16(POSIX_CTXT_DATA_LEN);
815 /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */
816 pneg_ctxt->Name[0] = 0x93;
817 pneg_ctxt->Name[1] = 0xAD;
818 pneg_ctxt->Name[2] = 0x25;
819 pneg_ctxt->Name[3] = 0x50;
820 pneg_ctxt->Name[4] = 0x9C;
821 pneg_ctxt->Name[5] = 0xB4;
822 pneg_ctxt->Name[6] = 0x11;
823 pneg_ctxt->Name[7] = 0xE7;
824 pneg_ctxt->Name[8] = 0xB4;
825 pneg_ctxt->Name[9] = 0x23;
826 pneg_ctxt->Name[10] = 0x83;
827 pneg_ctxt->Name[11] = 0xDE;
828 pneg_ctxt->Name[12] = 0x96;
829 pneg_ctxt->Name[13] = 0x8B;
830 pneg_ctxt->Name[14] = 0xCD;
831 pneg_ctxt->Name[15] = 0x7C;
832 }
833
834 static unsigned int assemble_neg_contexts(struct ksmbd_conn *conn,
835 struct smb2_negotiate_rsp *rsp)
836 {
837 char * const pneg_ctxt = (char *)rsp +
838 le32_to_cpu(rsp->NegotiateContextOffset);
839 int neg_ctxt_cnt = 1;
840 int ctxt_size;
841
842 ksmbd_debug(SMB,
843 "assemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n");
844 build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt,
845 conn->preauth_info->Preauth_HashId);
846 ctxt_size = sizeof(struct smb2_preauth_neg_context);
847
848 if (conn->cipher_type) {
849 /* Round to 8 byte boundary */
850 ctxt_size = round_up(ctxt_size, 8);
851 ksmbd_debug(SMB,
852 "assemble SMB2_ENCRYPTION_CAPABILITIES context\n");
853 build_encrypt_ctxt((struct smb2_encryption_neg_context *)
854 (pneg_ctxt + ctxt_size),
855 conn->cipher_type);
856 neg_ctxt_cnt++;
857 ctxt_size += sizeof(struct smb2_encryption_neg_context) + 2;
858 }
859
860 /* compression context not yet supported */
861 WARN_ON(conn->compress_algorithm != SMB3_COMPRESS_NONE);
862
863 if (conn->posix_ext_supported) {
864 ctxt_size = round_up(ctxt_size, 8);
865 ksmbd_debug(SMB,
866 "assemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n");
867 build_posix_ctxt((struct smb2_posix_neg_context *)
868 (pneg_ctxt + ctxt_size));
869 neg_ctxt_cnt++;
870 ctxt_size += sizeof(struct smb2_posix_neg_context);
871 }
872
873 if (conn->signing_negotiated) {
874 ctxt_size = round_up(ctxt_size, 8);
875 ksmbd_debug(SMB,
876 "assemble SMB2_SIGNING_CAPABILITIES context\n");
877 build_sign_cap_ctxt((struct smb2_signing_capabilities *)
878 (pneg_ctxt + ctxt_size),
879 conn->signing_algorithm);
880 neg_ctxt_cnt++;
881 ctxt_size += sizeof(struct smb2_signing_capabilities) + 2;
882 }
883
884 rsp->NegotiateContextCount = cpu_to_le16(neg_ctxt_cnt);
885 return ctxt_size + AUTH_GSS_PADDING;
886 }
887
888 static __le32 decode_preauth_ctxt(struct ksmbd_conn *conn,
889 struct smb2_preauth_neg_context *pneg_ctxt,
890 int ctxt_len)
891 {
892 /*
893 * sizeof(smb2_preauth_neg_context) assumes SMB311_SALT_SIZE Salt,
894 * which may not be present. Only check for used HashAlgorithms[1].
895 */
896 if (ctxt_len <
897 sizeof(struct smb2_neg_context) + MIN_PREAUTH_CTXT_DATA_LEN)
898 return STATUS_INVALID_PARAMETER;
899
900 if (pneg_ctxt->HashAlgorithms != SMB2_PREAUTH_INTEGRITY_SHA512)
901 return STATUS_NO_PREAUTH_INTEGRITY_HASH_OVERLAP;
902
903 conn->preauth_info->Preauth_HashId = SMB2_PREAUTH_INTEGRITY_SHA512;
904 return STATUS_SUCCESS;
905 }
906
907 static void decode_encrypt_ctxt(struct ksmbd_conn *conn,
908 struct smb2_encryption_neg_context *pneg_ctxt,
909 int ctxt_len)
910 {
911 int cph_cnt;
912 int i, cphs_size;
913
914 if (sizeof(struct smb2_encryption_neg_context) > ctxt_len) {
915 pr_err("Invalid SMB2_ENCRYPTION_CAPABILITIES context size\n");
916 return;
917 }
918
919 conn->cipher_type = 0;
920
921 cph_cnt = le16_to_cpu(pneg_ctxt->CipherCount);
922 cphs_size = cph_cnt * sizeof(__le16);
923
924 if (sizeof(struct smb2_encryption_neg_context) + cphs_size >
925 ctxt_len) {
926 pr_err("Invalid cipher count(%d)\n", cph_cnt);
927 return;
928 }
929
930 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION_OFF)
931 return;
932
933 for (i = 0; i < cph_cnt; i++) {
934 if (pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_GCM ||
935 pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_CCM ||
936 pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_CCM ||
937 pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_GCM) {
938 ksmbd_debug(SMB, "Cipher ID = 0x%x\n",
939 pneg_ctxt->Ciphers[i]);
940 conn->cipher_type = pneg_ctxt->Ciphers[i];
941 break;
942 }
943 }
944 }
945
946 /**
947 * smb3_encryption_negotiated() - checks if server and client agreed on enabling encryption
948 * @conn: smb connection
949 *
950 * Return: true if connection should be encrypted, else false
951 */
952 bool smb3_encryption_negotiated(struct ksmbd_conn *conn)
953 {
954 if (!conn->ops->generate_encryptionkey)
955 return false;
956
957 /*
958 * SMB 3.0 and 3.0.2 dialects use the SMB2_GLOBAL_CAP_ENCRYPTION flag.
959 * SMB 3.1.1 uses the cipher_type field.
960 */
961 return (conn->vals->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION) ||
962 conn->cipher_type;
963 }
964
965 static void decode_compress_ctxt(struct ksmbd_conn *conn,
966 struct smb2_compression_capabilities_context *pneg_ctxt)
967 {
968 conn->compress_algorithm = SMB3_COMPRESS_NONE;
969 }
970
971 static void decode_sign_cap_ctxt(struct ksmbd_conn *conn,
972 struct smb2_signing_capabilities *pneg_ctxt,
973 int ctxt_len)
974 {
975 int sign_algo_cnt;
976 int i, sign_alos_size;
977
978 if (sizeof(struct smb2_signing_capabilities) > ctxt_len) {
979 pr_err("Invalid SMB2_SIGNING_CAPABILITIES context length\n");
980 return;
981 }
982
983 conn->signing_negotiated = false;
984 sign_algo_cnt = le16_to_cpu(pneg_ctxt->SigningAlgorithmCount);
985 sign_alos_size = sign_algo_cnt * sizeof(__le16);
986
987 if (sizeof(struct smb2_signing_capabilities) + sign_alos_size >
988 ctxt_len) {
989 pr_err("Invalid signing algorithm count(%d)\n", sign_algo_cnt);
990 return;
991 }
992
993 for (i = 0; i < sign_algo_cnt; i++) {
994 if (pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_HMAC_SHA256_LE ||
995 pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_AES_CMAC_LE) {
996 ksmbd_debug(SMB, "Signing Algorithm ID = 0x%x\n",
997 pneg_ctxt->SigningAlgorithms[i]);
998 conn->signing_negotiated = true;
999 conn->signing_algorithm =
1000 pneg_ctxt->SigningAlgorithms[i];
1001 break;
1002 }
1003 }
1004 }
1005
1006 static __le32 deassemble_neg_contexts(struct ksmbd_conn *conn,
1007 struct smb2_negotiate_req *req,
1008 unsigned int len_of_smb)
1009 {
1010 /* +4 is to account for the RFC1001 len field */
1011 struct smb2_neg_context *pctx = (struct smb2_neg_context *)req;
1012 int i = 0, len_of_ctxts;
1013 unsigned int offset = le32_to_cpu(req->NegotiateContextOffset);
1014 unsigned int neg_ctxt_cnt = le16_to_cpu(req->NegotiateContextCount);
1015 __le32 status = STATUS_INVALID_PARAMETER;
1016
1017 ksmbd_debug(SMB, "decoding %d negotiate contexts\n", neg_ctxt_cnt);
1018 if (len_of_smb <= offset) {
1019 ksmbd_debug(SMB, "Invalid response: negotiate context offset\n");
1020 return status;
1021 }
1022
1023 len_of_ctxts = len_of_smb - offset;
1024
1025 while (i++ < neg_ctxt_cnt) {
1026 int clen, ctxt_len;
1027
1028 if (len_of_ctxts < (int)sizeof(struct smb2_neg_context))
1029 break;
1030
1031 pctx = (struct smb2_neg_context *)((char *)pctx + offset);
1032 clen = le16_to_cpu(pctx->DataLength);
1033 ctxt_len = clen + sizeof(struct smb2_neg_context);
1034
1035 if (ctxt_len > len_of_ctxts)
1036 break;
1037
1038 if (pctx->ContextType == SMB2_PREAUTH_INTEGRITY_CAPABILITIES) {
1039 ksmbd_debug(SMB,
1040 "deassemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n");
1041 if (conn->preauth_info->Preauth_HashId)
1042 break;
1043
1044 status = decode_preauth_ctxt(conn,
1045 (struct smb2_preauth_neg_context *)pctx,
1046 ctxt_len);
1047 if (status != STATUS_SUCCESS)
1048 break;
1049 } else if (pctx->ContextType == SMB2_ENCRYPTION_CAPABILITIES) {
1050 ksmbd_debug(SMB,
1051 "deassemble SMB2_ENCRYPTION_CAPABILITIES context\n");
1052 if (conn->cipher_type)
1053 break;
1054
1055 decode_encrypt_ctxt(conn,
1056 (struct smb2_encryption_neg_context *)pctx,
1057 ctxt_len);
1058 } else if (pctx->ContextType == SMB2_COMPRESSION_CAPABILITIES) {
1059 ksmbd_debug(SMB,
1060 "deassemble SMB2_COMPRESSION_CAPABILITIES context\n");
1061 if (conn->compress_algorithm)
1062 break;
1063
1064 decode_compress_ctxt(conn,
1065 (struct smb2_compression_capabilities_context *)pctx);
1066 } else if (pctx->ContextType == SMB2_NETNAME_NEGOTIATE_CONTEXT_ID) {
1067 ksmbd_debug(SMB,
1068 "deassemble SMB2_NETNAME_NEGOTIATE_CONTEXT_ID context\n");
1069 } else if (pctx->ContextType == SMB2_POSIX_EXTENSIONS_AVAILABLE) {
1070 ksmbd_debug(SMB,
1071 "deassemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n");
1072 conn->posix_ext_supported = true;
1073 } else if (pctx->ContextType == SMB2_SIGNING_CAPABILITIES) {
1074 ksmbd_debug(SMB,
1075 "deassemble SMB2_SIGNING_CAPABILITIES context\n");
1076
1077 decode_sign_cap_ctxt(conn,
1078 (struct smb2_signing_capabilities *)pctx,
1079 ctxt_len);
1080 }
1081
1082 /* offsets must be 8 byte aligned */
1083 offset = (ctxt_len + 7) & ~0x7;
1084 len_of_ctxts -= offset;
1085 }
1086 return status;
1087 }
1088
1089 /**
1090 * smb2_handle_negotiate() - handler for smb2 negotiate command
1091 * @work: smb work containing smb request buffer
1092 *
1093 * Return: 0
1094 */
1095 int smb2_handle_negotiate(struct ksmbd_work *work)
1096 {
1097 struct ksmbd_conn *conn = work->conn;
1098 struct smb2_negotiate_req *req = smb2_get_msg(work->request_buf);
1099 struct smb2_negotiate_rsp *rsp = smb2_get_msg(work->response_buf);
1100 int rc = 0;
1101 unsigned int smb2_buf_len, smb2_neg_size, neg_ctxt_len = 0;
1102 __le32 status;
1103
1104 ksmbd_debug(SMB, "Received negotiate request\n");
1105 conn->need_neg = false;
1106 if (ksmbd_conn_good(conn)) {
1107 pr_err("conn->tcp_status is already in CifsGood State\n");
1108 work->send_no_response = 1;
1109 return rc;
1110 }
1111
1112 smb2_buf_len = get_rfc1002_len(work->request_buf);
1113 smb2_neg_size = offsetof(struct smb2_negotiate_req, Dialects);
1114 if (smb2_neg_size > smb2_buf_len) {
1115 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1116 rc = -EINVAL;
1117 goto err_out;
1118 }
1119
1120 if (req->DialectCount == 0) {
1121 pr_err("malformed packet\n");
1122 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1123 rc = -EINVAL;
1124 goto err_out;
1125 }
1126
1127 if (conn->dialect == SMB311_PROT_ID) {
1128 unsigned int nego_ctxt_off = le32_to_cpu(req->NegotiateContextOffset);
1129
1130 if (smb2_buf_len < nego_ctxt_off) {
1131 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1132 rc = -EINVAL;
1133 goto err_out;
1134 }
1135
1136 if (smb2_neg_size > nego_ctxt_off) {
1137 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1138 rc = -EINVAL;
1139 goto err_out;
1140 }
1141
1142 if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) >
1143 nego_ctxt_off) {
1144 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1145 rc = -EINVAL;
1146 goto err_out;
1147 }
1148 } else {
1149 if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) >
1150 smb2_buf_len) {
1151 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1152 rc = -EINVAL;
1153 goto err_out;
1154 }
1155 }
1156
1157 conn->cli_cap = le32_to_cpu(req->Capabilities);
1158 switch (conn->dialect) {
1159 case SMB311_PROT_ID:
1160 conn->preauth_info =
1161 kzalloc(sizeof(struct preauth_integrity_info),
1162 GFP_KERNEL);
1163 if (!conn->preauth_info) {
1164 rc = -ENOMEM;
1165 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1166 goto err_out;
1167 }
1168
1169 status = deassemble_neg_contexts(conn, req,
1170 get_rfc1002_len(work->request_buf));
1171 if (status != STATUS_SUCCESS) {
1172 pr_err("deassemble_neg_contexts error(0x%x)\n",
1173 status);
1174 rsp->hdr.Status = status;
1175 rc = -EINVAL;
1176 kfree(conn->preauth_info);
1177 conn->preauth_info = NULL;
1178 goto err_out;
1179 }
1180
1181 rc = init_smb3_11_server(conn);
1182 if (rc < 0) {
1183 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1184 kfree(conn->preauth_info);
1185 conn->preauth_info = NULL;
1186 goto err_out;
1187 }
1188
1189 ksmbd_gen_preauth_integrity_hash(conn,
1190 work->request_buf,
1191 conn->preauth_info->Preauth_HashValue);
1192 rsp->NegotiateContextOffset =
1193 cpu_to_le32(OFFSET_OF_NEG_CONTEXT);
1194 neg_ctxt_len = assemble_neg_contexts(conn, rsp);
1195 break;
1196 case SMB302_PROT_ID:
1197 init_smb3_02_server(conn);
1198 break;
1199 case SMB30_PROT_ID:
1200 init_smb3_0_server(conn);
1201 break;
1202 case SMB21_PROT_ID:
1203 init_smb2_1_server(conn);
1204 break;
1205 case SMB2X_PROT_ID:
1206 case BAD_PROT_ID:
1207 default:
1208 ksmbd_debug(SMB, "Server dialect :0x%x not supported\n",
1209 conn->dialect);
1210 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
1211 rc = -EINVAL;
1212 goto err_out;
1213 }
1214 rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
1215
1216 /* For stats */
1217 conn->connection_type = conn->dialect;
1218
1219 rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size);
1220 rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size);
1221 rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size);
1222
1223 memcpy(conn->ClientGUID, req->ClientGUID,
1224 SMB2_CLIENT_GUID_SIZE);
1225 conn->cli_sec_mode = le16_to_cpu(req->SecurityMode);
1226
1227 rsp->StructureSize = cpu_to_le16(65);
1228 rsp->DialectRevision = cpu_to_le16(conn->dialect);
1229 /* Not setting conn guid rsp->ServerGUID, as it
1230 * not used by client for identifying server
1231 */
1232 memset(rsp->ServerGUID, 0, SMB2_CLIENT_GUID_SIZE);
1233
1234 rsp->SystemTime = cpu_to_le64(ksmbd_systime());
1235 rsp->ServerStartTime = 0;
1236 ksmbd_debug(SMB, "negotiate context offset %d, count %d\n",
1237 le32_to_cpu(rsp->NegotiateContextOffset),
1238 le16_to_cpu(rsp->NegotiateContextCount));
1239
1240 rsp->SecurityBufferOffset = cpu_to_le16(128);
1241 rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH);
1242 ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) +
1243 le16_to_cpu(rsp->SecurityBufferOffset));
1244
1245 rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE;
1246 conn->use_spnego = true;
1247
1248 if ((server_conf.signing == KSMBD_CONFIG_OPT_AUTO ||
1249 server_conf.signing == KSMBD_CONFIG_OPT_DISABLED) &&
1250 req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED_LE)
1251 conn->sign = true;
1252 else if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY) {
1253 server_conf.enforced_signing = true;
1254 rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE;
1255 conn->sign = true;
1256 }
1257
1258 conn->srv_sec_mode = le16_to_cpu(rsp->SecurityMode);
1259 ksmbd_conn_set_need_negotiate(conn);
1260
1261 err_out:
1262 if (rc)
1263 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
1264
1265 if (!rc)
1266 rc = ksmbd_iov_pin_rsp(work, rsp,
1267 sizeof(struct smb2_negotiate_rsp) +
1268 AUTH_GSS_LENGTH + neg_ctxt_len);
1269 if (rc < 0)
1270 smb2_set_err_rsp(work);
1271 return rc;
1272 }
1273
1274 static int alloc_preauth_hash(struct ksmbd_session *sess,
1275 struct ksmbd_conn *conn)
1276 {
1277 if (sess->Preauth_HashValue)
1278 return 0;
1279
1280 sess->Preauth_HashValue = kmemdup(conn->preauth_info->Preauth_HashValue,
1281 PREAUTH_HASHVALUE_SIZE, GFP_KERNEL);
1282 if (!sess->Preauth_HashValue)
1283 return -ENOMEM;
1284
1285 return 0;
1286 }
1287
1288 static int generate_preauth_hash(struct ksmbd_work *work)
1289 {
1290 struct ksmbd_conn *conn = work->conn;
1291 struct ksmbd_session *sess = work->sess;
1292 u8 *preauth_hash;
1293
1294 if (conn->dialect != SMB311_PROT_ID)
1295 return 0;
1296
1297 if (conn->binding) {
1298 struct preauth_session *preauth_sess;
1299
1300 preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id);
1301 if (!preauth_sess) {
1302 preauth_sess = ksmbd_preauth_session_alloc(conn, sess->id);
1303 if (!preauth_sess)
1304 return -ENOMEM;
1305 }
1306
1307 preauth_hash = preauth_sess->Preauth_HashValue;
1308 } else {
1309 if (!sess->Preauth_HashValue)
1310 if (alloc_preauth_hash(sess, conn))
1311 return -ENOMEM;
1312 preauth_hash = sess->Preauth_HashValue;
1313 }
1314
1315 ksmbd_gen_preauth_integrity_hash(conn, work->request_buf, preauth_hash);
1316 return 0;
1317 }
1318
1319 static int decode_negotiation_token(struct ksmbd_conn *conn,
1320 struct negotiate_message *negblob,
1321 size_t sz)
1322 {
1323 if (!conn->use_spnego)
1324 return -EINVAL;
1325
1326 if (ksmbd_decode_negTokenInit((char *)negblob, sz, conn)) {
1327 if (ksmbd_decode_negTokenTarg((char *)negblob, sz, conn)) {
1328 conn->auth_mechs |= KSMBD_AUTH_NTLMSSP;
1329 conn->preferred_auth_mech = KSMBD_AUTH_NTLMSSP;
1330 conn->use_spnego = false;
1331 }
1332 }
1333 return 0;
1334 }
1335
1336 static int ntlm_negotiate(struct ksmbd_work *work,
1337 struct negotiate_message *negblob,
1338 size_t negblob_len, struct smb2_sess_setup_rsp *rsp)
1339 {
1340 struct challenge_message *chgblob;
1341 unsigned char *spnego_blob = NULL;
1342 u16 spnego_blob_len;
1343 char *neg_blob;
1344 int sz, rc;
1345
1346 ksmbd_debug(SMB, "negotiate phase\n");
1347 rc = ksmbd_decode_ntlmssp_neg_blob(negblob, negblob_len, work->conn);
1348 if (rc)
1349 return rc;
1350
1351 sz = le16_to_cpu(rsp->SecurityBufferOffset);
1352 chgblob =
1353 (struct challenge_message *)((char *)&rsp->hdr.ProtocolId + sz);
1354 memset(chgblob, 0, sizeof(struct challenge_message));
1355
1356 if (!work->conn->use_spnego) {
1357 sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn);
1358 if (sz < 0)
1359 return -ENOMEM;
1360
1361 rsp->SecurityBufferLength = cpu_to_le16(sz);
1362 return 0;
1363 }
1364
1365 sz = sizeof(struct challenge_message);
1366 sz += (strlen(ksmbd_netbios_name()) * 2 + 1 + 4) * 6;
1367
1368 neg_blob = kzalloc(sz, GFP_KERNEL);
1369 if (!neg_blob)
1370 return -ENOMEM;
1371
1372 chgblob = (struct challenge_message *)neg_blob;
1373 sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn);
1374 if (sz < 0) {
1375 rc = -ENOMEM;
1376 goto out;
1377 }
1378
1379 rc = build_spnego_ntlmssp_neg_blob(&spnego_blob, &spnego_blob_len,
1380 neg_blob, sz);
1381 if (rc) {
1382 rc = -ENOMEM;
1383 goto out;
1384 }
1385
1386 sz = le16_to_cpu(rsp->SecurityBufferOffset);
1387 memcpy((char *)&rsp->hdr.ProtocolId + sz, spnego_blob, spnego_blob_len);
1388 rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len);
1389
1390 out:
1391 kfree(spnego_blob);
1392 kfree(neg_blob);
1393 return rc;
1394 }
1395
1396 static struct authenticate_message *user_authblob(struct ksmbd_conn *conn,
1397 struct smb2_sess_setup_req *req)
1398 {
1399 int sz;
1400
1401 if (conn->use_spnego && conn->mechToken)
1402 return (struct authenticate_message *)conn->mechToken;
1403
1404 sz = le16_to_cpu(req->SecurityBufferOffset);
1405 return (struct authenticate_message *)((char *)&req->hdr.ProtocolId
1406 + sz);
1407 }
1408
1409 static struct ksmbd_user *session_user(struct ksmbd_conn *conn,
1410 struct smb2_sess_setup_req *req)
1411 {
1412 struct authenticate_message *authblob;
1413 struct ksmbd_user *user;
1414 char *name;
1415 unsigned int name_off, name_len, secbuf_len;
1416
1417 if (conn->use_spnego && conn->mechToken)
1418 secbuf_len = conn->mechTokenLen;
1419 else
1420 secbuf_len = le16_to_cpu(req->SecurityBufferLength);
1421 if (secbuf_len < sizeof(struct authenticate_message)) {
1422 ksmbd_debug(SMB, "blob len %d too small\n", secbuf_len);
1423 return NULL;
1424 }
1425 authblob = user_authblob(conn, req);
1426 name_off = le32_to_cpu(authblob->UserName.BufferOffset);
1427 name_len = le16_to_cpu(authblob->UserName.Length);
1428
1429 if (secbuf_len < (u64)name_off + name_len)
1430 return NULL;
1431
1432 name = smb_strndup_from_utf16((const char *)authblob + name_off,
1433 name_len,
1434 true,
1435 conn->local_nls);
1436 if (IS_ERR(name)) {
1437 pr_err("cannot allocate memory\n");
1438 return NULL;
1439 }
1440
1441 ksmbd_debug(SMB, "session setup request for user %s\n", name);
1442 user = ksmbd_login_user(name);
1443 kfree(name);
1444 return user;
1445 }
1446
1447 static int ntlm_authenticate(struct ksmbd_work *work,
1448 struct smb2_sess_setup_req *req,
1449 struct smb2_sess_setup_rsp *rsp)
1450 {
1451 struct ksmbd_conn *conn = work->conn;
1452 struct ksmbd_session *sess = work->sess;
1453 struct channel *chann = NULL;
1454 struct ksmbd_user *user;
1455 u64 prev_id;
1456 int sz, rc;
1457
1458 ksmbd_debug(SMB, "authenticate phase\n");
1459 if (conn->use_spnego) {
1460 unsigned char *spnego_blob;
1461 u16 spnego_blob_len;
1462
1463 rc = build_spnego_ntlmssp_auth_blob(&spnego_blob,
1464 &spnego_blob_len,
1465 0);
1466 if (rc)
1467 return -ENOMEM;
1468
1469 sz = le16_to_cpu(rsp->SecurityBufferOffset);
1470 memcpy((char *)&rsp->hdr.ProtocolId + sz, spnego_blob, spnego_blob_len);
1471 rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len);
1472 kfree(spnego_blob);
1473 }
1474
1475 user = session_user(conn, req);
1476 if (!user) {
1477 ksmbd_debug(SMB, "Unknown user name or an error\n");
1478 return -EPERM;
1479 }
1480
1481 /* Check for previous session */
1482 prev_id = le64_to_cpu(req->PreviousSessionId);
1483 if (prev_id && prev_id != sess->id)
1484 destroy_previous_session(conn, user, prev_id);
1485
1486 if (sess->state == SMB2_SESSION_VALID) {
1487 /*
1488 * Reuse session if anonymous try to connect
1489 * on reauthetication.
1490 */
1491 if (conn->binding == false && ksmbd_anonymous_user(user)) {
1492 ksmbd_free_user(user);
1493 return 0;
1494 }
1495
1496 if (!ksmbd_compare_user(sess->user, user)) {
1497 ksmbd_free_user(user);
1498 return -EPERM;
1499 }
1500 ksmbd_free_user(user);
1501 } else {
1502 sess->user = user;
1503 }
1504
1505 if (conn->binding == false && user_guest(sess->user)) {
1506 rsp->SessionFlags = SMB2_SESSION_FLAG_IS_GUEST_LE;
1507 } else {
1508 struct authenticate_message *authblob;
1509
1510 authblob = user_authblob(conn, req);
1511 if (conn->use_spnego && conn->mechToken)
1512 sz = conn->mechTokenLen;
1513 else
1514 sz = le16_to_cpu(req->SecurityBufferLength);
1515 rc = ksmbd_decode_ntlmssp_auth_blob(authblob, sz, conn, sess);
1516 if (rc) {
1517 set_user_flag(sess->user, KSMBD_USER_FLAG_BAD_PASSWORD);
1518 ksmbd_debug(SMB, "authentication failed\n");
1519 return -EPERM;
1520 }
1521 }
1522
1523 /*
1524 * If session state is SMB2_SESSION_VALID, We can assume
1525 * that it is reauthentication. And the user/password
1526 * has been verified, so return it here.
1527 */
1528 if (sess->state == SMB2_SESSION_VALID) {
1529 if (conn->binding)
1530 goto binding_session;
1531 return 0;
1532 }
1533
1534 if ((rsp->SessionFlags != SMB2_SESSION_FLAG_IS_GUEST_LE &&
1535 (conn->sign || server_conf.enforced_signing)) ||
1536 (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED))
1537 sess->sign = true;
1538
1539 if (smb3_encryption_negotiated(conn) &&
1540 !(req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) {
1541 rc = conn->ops->generate_encryptionkey(conn, sess);
1542 if (rc) {
1543 ksmbd_debug(SMB,
1544 "SMB3 encryption key generation failed\n");
1545 return -EINVAL;
1546 }
1547 sess->enc = true;
1548 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION)
1549 rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE;
1550 /*
1551 * signing is disable if encryption is enable
1552 * on this session
1553 */
1554 sess->sign = false;
1555 }
1556
1557 binding_session:
1558 if (conn->dialect >= SMB30_PROT_ID) {
1559 chann = lookup_chann_list(sess, conn);
1560 if (!chann) {
1561 chann = kmalloc(sizeof(struct channel), GFP_KERNEL);
1562 if (!chann)
1563 return -ENOMEM;
1564
1565 chann->conn = conn;
1566 xa_store(&sess->ksmbd_chann_list, (long)conn, chann, GFP_KERNEL);
1567 }
1568 }
1569
1570 if (conn->ops->generate_signingkey) {
1571 rc = conn->ops->generate_signingkey(sess, conn);
1572 if (rc) {
1573 ksmbd_debug(SMB, "SMB3 signing key generation failed\n");
1574 return -EINVAL;
1575 }
1576 }
1577
1578 if (!ksmbd_conn_lookup_dialect(conn)) {
1579 pr_err("fail to verify the dialect\n");
1580 return -ENOENT;
1581 }
1582 return 0;
1583 }
1584
1585 #ifdef CONFIG_SMB_SERVER_KERBEROS5
1586 static int krb5_authenticate(struct ksmbd_work *work,
1587 struct smb2_sess_setup_req *req,
1588 struct smb2_sess_setup_rsp *rsp)
1589 {
1590 struct ksmbd_conn *conn = work->conn;
1591 struct ksmbd_session *sess = work->sess;
1592 char *in_blob, *out_blob;
1593 struct channel *chann = NULL;
1594 u64 prev_sess_id;
1595 int in_len, out_len;
1596 int retval;
1597
1598 in_blob = (char *)&req->hdr.ProtocolId +
1599 le16_to_cpu(req->SecurityBufferOffset);
1600 in_len = le16_to_cpu(req->SecurityBufferLength);
1601 out_blob = (char *)&rsp->hdr.ProtocolId +
1602 le16_to_cpu(rsp->SecurityBufferOffset);
1603 out_len = work->response_sz -
1604 (le16_to_cpu(rsp->SecurityBufferOffset) + 4);
1605
1606 /* Check previous session */
1607 prev_sess_id = le64_to_cpu(req->PreviousSessionId);
1608 if (prev_sess_id && prev_sess_id != sess->id)
1609 destroy_previous_session(conn, sess->user, prev_sess_id);
1610
1611 if (sess->state == SMB2_SESSION_VALID)
1612 ksmbd_free_user(sess->user);
1613
1614 retval = ksmbd_krb5_authenticate(sess, in_blob, in_len,
1615 out_blob, &out_len);
1616 if (retval) {
1617 ksmbd_debug(SMB, "krb5 authentication failed\n");
1618 return -EINVAL;
1619 }
1620 rsp->SecurityBufferLength = cpu_to_le16(out_len);
1621
1622 if ((conn->sign || server_conf.enforced_signing) ||
1623 (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED))
1624 sess->sign = true;
1625
1626 if (smb3_encryption_negotiated(conn)) {
1627 retval = conn->ops->generate_encryptionkey(conn, sess);
1628 if (retval) {
1629 ksmbd_debug(SMB,
1630 "SMB3 encryption key generation failed\n");
1631 return -EINVAL;
1632 }
1633 sess->enc = true;
1634 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION)
1635 rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE;
1636 sess->sign = false;
1637 }
1638
1639 if (conn->dialect >= SMB30_PROT_ID) {
1640 chann = lookup_chann_list(sess, conn);
1641 if (!chann) {
1642 chann = kmalloc(sizeof(struct channel), GFP_KERNEL);
1643 if (!chann)
1644 return -ENOMEM;
1645
1646 chann->conn = conn;
1647 xa_store(&sess->ksmbd_chann_list, (long)conn, chann, GFP_KERNEL);
1648 }
1649 }
1650
1651 if (conn->ops->generate_signingkey) {
1652 retval = conn->ops->generate_signingkey(sess, conn);
1653 if (retval) {
1654 ksmbd_debug(SMB, "SMB3 signing key generation failed\n");
1655 return -EINVAL;
1656 }
1657 }
1658
1659 if (!ksmbd_conn_lookup_dialect(conn)) {
1660 pr_err("fail to verify the dialect\n");
1661 return -ENOENT;
1662 }
1663 return 0;
1664 }
1665 #else
1666 static int krb5_authenticate(struct ksmbd_work *work,
1667 struct smb2_sess_setup_req *req,
1668 struct smb2_sess_setup_rsp *rsp)
1669 {
1670 return -EOPNOTSUPP;
1671 }
1672 #endif
1673
1674 int smb2_sess_setup(struct ksmbd_work *work)
1675 {
1676 struct ksmbd_conn *conn = work->conn;
1677 struct smb2_sess_setup_req *req;
1678 struct smb2_sess_setup_rsp *rsp;
1679 struct ksmbd_session *sess;
1680 struct negotiate_message *negblob;
1681 unsigned int negblob_len, negblob_off;
1682 int rc = 0;
1683
1684 ksmbd_debug(SMB, "Received request for session setup\n");
1685
1686 WORK_BUFFERS(work, req, rsp);
1687
1688 rsp->StructureSize = cpu_to_le16(9);
1689 rsp->SessionFlags = 0;
1690 rsp->SecurityBufferOffset = cpu_to_le16(72);
1691 rsp->SecurityBufferLength = 0;
1692
1693 ksmbd_conn_lock(conn);
1694 if (!req->hdr.SessionId) {
1695 sess = ksmbd_smb2_session_create();
1696 if (!sess) {
1697 rc = -ENOMEM;
1698 goto out_err;
1699 }
1700 rsp->hdr.SessionId = cpu_to_le64(sess->id);
1701 rc = ksmbd_session_register(conn, sess);
1702 if (rc)
1703 goto out_err;
1704 } else if (conn->dialect >= SMB30_PROT_ID &&
1705 (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) &&
1706 req->Flags & SMB2_SESSION_REQ_FLAG_BINDING) {
1707 u64 sess_id = le64_to_cpu(req->hdr.SessionId);
1708
1709 sess = ksmbd_session_lookup_slowpath(sess_id);
1710 if (!sess) {
1711 rc = -ENOENT;
1712 goto out_err;
1713 }
1714
1715 if (conn->dialect != sess->dialect) {
1716 rc = -EINVAL;
1717 goto out_err;
1718 }
1719
1720 if (!(req->hdr.Flags & SMB2_FLAGS_SIGNED)) {
1721 rc = -EINVAL;
1722 goto out_err;
1723 }
1724
1725 if (strncmp(conn->ClientGUID, sess->ClientGUID,
1726 SMB2_CLIENT_GUID_SIZE)) {
1727 rc = -ENOENT;
1728 goto out_err;
1729 }
1730
1731 if (sess->state == SMB2_SESSION_IN_PROGRESS) {
1732 rc = -EACCES;
1733 goto out_err;
1734 }
1735
1736 if (sess->state == SMB2_SESSION_EXPIRED) {
1737 rc = -EFAULT;
1738 goto out_err;
1739 }
1740
1741 if (ksmbd_conn_need_reconnect(conn)) {
1742 rc = -EFAULT;
1743 sess = NULL;
1744 goto out_err;
1745 }
1746
1747 if (ksmbd_session_lookup(conn, sess_id)) {
1748 rc = -EACCES;
1749 goto out_err;
1750 }
1751
1752 if (user_guest(sess->user)) {
1753 rc = -EOPNOTSUPP;
1754 goto out_err;
1755 }
1756
1757 conn->binding = true;
1758 } else if ((conn->dialect < SMB30_PROT_ID ||
1759 server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) &&
1760 (req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) {
1761 sess = NULL;
1762 rc = -EACCES;
1763 goto out_err;
1764 } else {
1765 sess = ksmbd_session_lookup(conn,
1766 le64_to_cpu(req->hdr.SessionId));
1767 if (!sess) {
1768 rc = -ENOENT;
1769 goto out_err;
1770 }
1771
1772 if (sess->state == SMB2_SESSION_EXPIRED) {
1773 rc = -EFAULT;
1774 goto out_err;
1775 }
1776
1777 if (ksmbd_conn_need_reconnect(conn)) {
1778 rc = -EFAULT;
1779 sess = NULL;
1780 goto out_err;
1781 }
1782 }
1783 work->sess = sess;
1784
1785 negblob_off = le16_to_cpu(req->SecurityBufferOffset);
1786 negblob_len = le16_to_cpu(req->SecurityBufferLength);
1787 if (negblob_off < offsetof(struct smb2_sess_setup_req, Buffer)) {
1788 rc = -EINVAL;
1789 goto out_err;
1790 }
1791
1792 negblob = (struct negotiate_message *)((char *)&req->hdr.ProtocolId +
1793 negblob_off);
1794
1795 if (decode_negotiation_token(conn, negblob, negblob_len) == 0) {
1796 if (conn->mechToken) {
1797 negblob = (struct negotiate_message *)conn->mechToken;
1798 negblob_len = conn->mechTokenLen;
1799 }
1800 }
1801
1802 if (negblob_len < offsetof(struct negotiate_message, NegotiateFlags)) {
1803 rc = -EINVAL;
1804 goto out_err;
1805 }
1806
1807 if (server_conf.auth_mechs & conn->auth_mechs) {
1808 rc = generate_preauth_hash(work);
1809 if (rc)
1810 goto out_err;
1811
1812 if (conn->preferred_auth_mech &
1813 (KSMBD_AUTH_KRB5 | KSMBD_AUTH_MSKRB5)) {
1814 rc = krb5_authenticate(work, req, rsp);
1815 if (rc) {
1816 rc = -EINVAL;
1817 goto out_err;
1818 }
1819
1820 if (!ksmbd_conn_need_reconnect(conn)) {
1821 ksmbd_conn_set_good(conn);
1822 sess->state = SMB2_SESSION_VALID;
1823 }
1824 kfree(sess->Preauth_HashValue);
1825 sess->Preauth_HashValue = NULL;
1826 } else if (conn->preferred_auth_mech == KSMBD_AUTH_NTLMSSP) {
1827 if (negblob->MessageType == NtLmNegotiate) {
1828 rc = ntlm_negotiate(work, negblob, negblob_len, rsp);
1829 if (rc)
1830 goto out_err;
1831 rsp->hdr.Status =
1832 STATUS_MORE_PROCESSING_REQUIRED;
1833 } else if (negblob->MessageType == NtLmAuthenticate) {
1834 rc = ntlm_authenticate(work, req, rsp);
1835 if (rc)
1836 goto out_err;
1837
1838 if (!ksmbd_conn_need_reconnect(conn)) {
1839 ksmbd_conn_set_good(conn);
1840 sess->state = SMB2_SESSION_VALID;
1841 }
1842 if (conn->binding) {
1843 struct preauth_session *preauth_sess;
1844
1845 preauth_sess =
1846 ksmbd_preauth_session_lookup(conn, sess->id);
1847 if (preauth_sess) {
1848 list_del(&preauth_sess->preauth_entry);
1849 kfree(preauth_sess);
1850 }
1851 }
1852 kfree(sess->Preauth_HashValue);
1853 sess->Preauth_HashValue = NULL;
1854 } else {
1855 pr_info_ratelimited("Unknown NTLMSSP message type : 0x%x\n",
1856 le32_to_cpu(negblob->MessageType));
1857 rc = -EINVAL;
1858 }
1859 } else {
1860 /* TODO: need one more negotiation */
1861 pr_err("Not support the preferred authentication\n");
1862 rc = -EINVAL;
1863 }
1864 } else {
1865 pr_err("Not support authentication\n");
1866 rc = -EINVAL;
1867 }
1868
1869 out_err:
1870 if (rc == -EINVAL)
1871 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1872 else if (rc == -ENOENT)
1873 rsp->hdr.Status = STATUS_USER_SESSION_DELETED;
1874 else if (rc == -EACCES)
1875 rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED;
1876 else if (rc == -EFAULT)
1877 rsp->hdr.Status = STATUS_NETWORK_SESSION_EXPIRED;
1878 else if (rc == -ENOMEM)
1879 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
1880 else if (rc == -EOPNOTSUPP)
1881 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
1882 else if (rc)
1883 rsp->hdr.Status = STATUS_LOGON_FAILURE;
1884
1885 if (conn->use_spnego && conn->mechToken) {
1886 kfree(conn->mechToken);
1887 conn->mechToken = NULL;
1888 }
1889
1890 if (rc < 0) {
1891 /*
1892 * SecurityBufferOffset should be set to zero
1893 * in session setup error response.
1894 */
1895 rsp->SecurityBufferOffset = 0;
1896
1897 if (sess) {
1898 bool try_delay = false;
1899
1900 /*
1901 * To avoid dictionary attacks (repeated session setups rapidly sent) to
1902 * connect to server, ksmbd make a delay of a 5 seconds on session setup
1903 * failure to make it harder to send enough random connection requests
1904 * to break into a server.
1905 */
1906 if (sess->user && sess->user->flags & KSMBD_USER_FLAG_DELAY_SESSION)
1907 try_delay = true;
1908
1909 sess->last_active = jiffies;
1910 sess->state = SMB2_SESSION_EXPIRED;
1911 if (try_delay) {
1912 ksmbd_conn_set_need_reconnect(conn);
1913 ssleep(5);
1914 ksmbd_conn_set_need_negotiate(conn);
1915 }
1916 }
1917 smb2_set_err_rsp(work);
1918 } else {
1919 unsigned int iov_len;
1920
1921 if (rsp->SecurityBufferLength)
1922 iov_len = offsetof(struct smb2_sess_setup_rsp, Buffer) +
1923 le16_to_cpu(rsp->SecurityBufferLength);
1924 else
1925 iov_len = sizeof(struct smb2_sess_setup_rsp);
1926 rc = ksmbd_iov_pin_rsp(work, rsp, iov_len);
1927 if (rc)
1928 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
1929 }
1930
1931 ksmbd_conn_unlock(conn);
1932 return rc;
1933 }
1934
1935 /**
1936 * smb2_tree_connect() - handler for smb2 tree connect command
1937 * @work: smb work containing smb request buffer
1938 *
1939 * Return: 0 on success, otherwise error
1940 */
1941 int smb2_tree_connect(struct ksmbd_work *work)
1942 {
1943 struct ksmbd_conn *conn = work->conn;
1944 struct smb2_tree_connect_req *req;
1945 struct smb2_tree_connect_rsp *rsp;
1946 struct ksmbd_session *sess = work->sess;
1947 char *treename = NULL, *name = NULL;
1948 struct ksmbd_tree_conn_status status;
1949 struct ksmbd_share_config *share;
1950 int rc = -EINVAL;
1951
1952 WORK_BUFFERS(work, req, rsp);
1953
1954 treename = smb_strndup_from_utf16(req->Buffer,
1955 le16_to_cpu(req->PathLength), true,
1956 conn->local_nls);
1957 if (IS_ERR(treename)) {
1958 pr_err("treename is NULL\n");
1959 status.ret = KSMBD_TREE_CONN_STATUS_ERROR;
1960 goto out_err1;
1961 }
1962
1963 name = ksmbd_extract_sharename(conn->um, treename);
1964 if (IS_ERR(name)) {
1965 status.ret = KSMBD_TREE_CONN_STATUS_ERROR;
1966 goto out_err1;
1967 }
1968
1969 ksmbd_debug(SMB, "tree connect request for tree %s treename %s\n",
1970 name, treename);
1971
1972 status = ksmbd_tree_conn_connect(conn, sess, name);
1973 if (status.ret == KSMBD_TREE_CONN_STATUS_OK)
1974 rsp->hdr.Id.SyncId.TreeId = cpu_to_le32(status.tree_conn->id);
1975 else
1976 goto out_err1;
1977
1978 share = status.tree_conn->share_conf;
1979 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) {
1980 ksmbd_debug(SMB, "IPC share path request\n");
1981 rsp->ShareType = SMB2_SHARE_TYPE_PIPE;
1982 rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE |
1983 FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE |
1984 FILE_DELETE_LE | FILE_READ_CONTROL_LE |
1985 FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE |
1986 FILE_SYNCHRONIZE_LE;
1987 } else {
1988 rsp->ShareType = SMB2_SHARE_TYPE_DISK;
1989 rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE |
1990 FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE;
1991 if (test_tree_conn_flag(status.tree_conn,
1992 KSMBD_TREE_CONN_FLAG_WRITABLE)) {
1993 rsp->MaximalAccess |= FILE_WRITE_DATA_LE |
1994 FILE_APPEND_DATA_LE | FILE_WRITE_EA_LE |
1995 FILE_DELETE_LE | FILE_WRITE_ATTRIBUTES_LE |
1996 FILE_DELETE_CHILD_LE | FILE_READ_CONTROL_LE |
1997 FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE |
1998 FILE_SYNCHRONIZE_LE;
1999 }
2000 }
2001
2002 status.tree_conn->maximal_access = le32_to_cpu(rsp->MaximalAccess);
2003 if (conn->posix_ext_supported)
2004 status.tree_conn->posix_extensions = true;
2005
2006 write_lock(&sess->tree_conns_lock);
2007 status.tree_conn->t_state = TREE_CONNECTED;
2008 write_unlock(&sess->tree_conns_lock);
2009 rsp->StructureSize = cpu_to_le16(16);
2010 out_err1:
2011 rsp->Capabilities = 0;
2012 rsp->Reserved = 0;
2013 /* default manual caching */
2014 rsp->ShareFlags = SMB2_SHAREFLAG_MANUAL_CACHING;
2015
2016 rc = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_tree_connect_rsp));
2017 if (rc)
2018 status.ret = KSMBD_TREE_CONN_STATUS_NOMEM;
2019
2020 if (!IS_ERR(treename))
2021 kfree(treename);
2022 if (!IS_ERR(name))
2023 kfree(name);
2024
2025 switch (status.ret) {
2026 case KSMBD_TREE_CONN_STATUS_OK:
2027 rsp->hdr.Status = STATUS_SUCCESS;
2028 rc = 0;
2029 break;
2030 case -ESTALE:
2031 case -ENOENT:
2032 case KSMBD_TREE_CONN_STATUS_NO_SHARE:
2033 rsp->hdr.Status = STATUS_BAD_NETWORK_NAME;
2034 break;
2035 case -ENOMEM:
2036 case KSMBD_TREE_CONN_STATUS_NOMEM:
2037 rsp->hdr.Status = STATUS_NO_MEMORY;
2038 break;
2039 case KSMBD_TREE_CONN_STATUS_ERROR:
2040 case KSMBD_TREE_CONN_STATUS_TOO_MANY_CONNS:
2041 case KSMBD_TREE_CONN_STATUS_TOO_MANY_SESSIONS:
2042 rsp->hdr.Status = STATUS_ACCESS_DENIED;
2043 break;
2044 case -EINVAL:
2045 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2046 break;
2047 default:
2048 rsp->hdr.Status = STATUS_ACCESS_DENIED;
2049 }
2050
2051 if (status.ret != KSMBD_TREE_CONN_STATUS_OK)
2052 smb2_set_err_rsp(work);
2053
2054 return rc;
2055 }
2056
2057 /**
2058 * smb2_create_open_flags() - convert smb open flags to unix open flags
2059 * @file_present: is file already present
2060 * @access: file access flags
2061 * @disposition: file disposition flags
2062 * @may_flags: set with MAY_ flags
2063 *
2064 * Return: file open flags
2065 */
2066 static int smb2_create_open_flags(bool file_present, __le32 access,
2067 __le32 disposition,
2068 int *may_flags)
2069 {
2070 int oflags = O_NONBLOCK | O_LARGEFILE;
2071
2072 if (access & FILE_READ_DESIRED_ACCESS_LE &&
2073 access & FILE_WRITE_DESIRE_ACCESS_LE) {
2074 oflags |= O_RDWR;
2075 *may_flags = MAY_OPEN | MAY_READ | MAY_WRITE;
2076 } else if (access & FILE_WRITE_DESIRE_ACCESS_LE) {
2077 oflags |= O_WRONLY;
2078 *may_flags = MAY_OPEN | MAY_WRITE;
2079 } else {
2080 oflags |= O_RDONLY;
2081 *may_flags = MAY_OPEN | MAY_READ;
2082 }
2083
2084 if (access == FILE_READ_ATTRIBUTES_LE)
2085 oflags |= O_PATH;
2086
2087 if (file_present) {
2088 switch (disposition & FILE_CREATE_MASK_LE) {
2089 case FILE_OPEN_LE:
2090 case FILE_CREATE_LE:
2091 break;
2092 case FILE_SUPERSEDE_LE:
2093 case FILE_OVERWRITE_LE:
2094 case FILE_OVERWRITE_IF_LE:
2095 oflags |= O_TRUNC;
2096 break;
2097 default:
2098 break;
2099 }
2100 } else {
2101 switch (disposition & FILE_CREATE_MASK_LE) {
2102 case FILE_SUPERSEDE_LE:
2103 case FILE_CREATE_LE:
2104 case FILE_OPEN_IF_LE:
2105 case FILE_OVERWRITE_IF_LE:
2106 oflags |= O_CREAT;
2107 break;
2108 case FILE_OPEN_LE:
2109 case FILE_OVERWRITE_LE:
2110 oflags &= ~O_CREAT;
2111 break;
2112 default:
2113 break;
2114 }
2115 }
2116
2117 return oflags;
2118 }
2119
2120 /**
2121 * smb2_tree_disconnect() - handler for smb tree connect request
2122 * @work: smb work containing request buffer
2123 *
2124 * Return: 0
2125 */
2126 int smb2_tree_disconnect(struct ksmbd_work *work)
2127 {
2128 struct smb2_tree_disconnect_rsp *rsp;
2129 struct smb2_tree_disconnect_req *req;
2130 struct ksmbd_session *sess = work->sess;
2131 struct ksmbd_tree_connect *tcon = work->tcon;
2132 int err;
2133
2134 WORK_BUFFERS(work, req, rsp);
2135
2136 ksmbd_debug(SMB, "request\n");
2137
2138 if (!tcon) {
2139 ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId);
2140
2141 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2142 err = -ENOENT;
2143 goto err_out;
2144 }
2145
2146 ksmbd_close_tree_conn_fds(work);
2147
2148 write_lock(&sess->tree_conns_lock);
2149 if (tcon->t_state == TREE_DISCONNECTED) {
2150 write_unlock(&sess->tree_conns_lock);
2151 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2152 err = -ENOENT;
2153 goto err_out;
2154 }
2155
2156 WARN_ON_ONCE(atomic_dec_and_test(&tcon->refcount));
2157 tcon->t_state = TREE_DISCONNECTED;
2158 write_unlock(&sess->tree_conns_lock);
2159
2160 err = ksmbd_tree_conn_disconnect(sess, tcon);
2161 if (err) {
2162 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2163 goto err_out;
2164 }
2165
2166 work->tcon = NULL;
2167
2168 rsp->StructureSize = cpu_to_le16(4);
2169 err = ksmbd_iov_pin_rsp(work, rsp,
2170 sizeof(struct smb2_tree_disconnect_rsp));
2171 if (err) {
2172 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
2173 goto err_out;
2174 }
2175
2176 return 0;
2177
2178 err_out:
2179 smb2_set_err_rsp(work);
2180 return err;
2181
2182 }
2183
2184 /**
2185 * smb2_session_logoff() - handler for session log off request
2186 * @work: smb work containing request buffer
2187 *
2188 * Return: 0
2189 */
2190 int smb2_session_logoff(struct ksmbd_work *work)
2191 {
2192 struct ksmbd_conn *conn = work->conn;
2193 struct smb2_logoff_req *req;
2194 struct smb2_logoff_rsp *rsp;
2195 struct ksmbd_session *sess;
2196 u64 sess_id;
2197 int err;
2198
2199 WORK_BUFFERS(work, req, rsp);
2200
2201 ksmbd_debug(SMB, "request\n");
2202
2203 ksmbd_conn_lock(conn);
2204 if (!ksmbd_conn_good(conn)) {
2205 ksmbd_conn_unlock(conn);
2206 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2207 smb2_set_err_rsp(work);
2208 return -ENOENT;
2209 }
2210 sess_id = le64_to_cpu(req->hdr.SessionId);
2211 ksmbd_all_conn_set_status(sess_id, KSMBD_SESS_NEED_RECONNECT);
2212 ksmbd_conn_unlock(conn);
2213
2214 ksmbd_close_session_fds(work);
2215 ksmbd_conn_wait_idle(conn, sess_id);
2216
2217 /*
2218 * Re-lookup session to validate if session is deleted
2219 * while waiting request complete
2220 */
2221 sess = ksmbd_session_lookup_all(conn, sess_id);
2222 if (ksmbd_tree_conn_session_logoff(sess)) {
2223 ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId);
2224 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2225 smb2_set_err_rsp(work);
2226 return -ENOENT;
2227 }
2228
2229 ksmbd_destroy_file_table(&sess->file_table);
2230 sess->state = SMB2_SESSION_EXPIRED;
2231
2232 ksmbd_free_user(sess->user);
2233 sess->user = NULL;
2234 ksmbd_all_conn_set_status(sess_id, KSMBD_SESS_NEED_NEGOTIATE);
2235
2236 rsp->StructureSize = cpu_to_le16(4);
2237 err = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_logoff_rsp));
2238 if (err) {
2239 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
2240 smb2_set_err_rsp(work);
2241 return err;
2242 }
2243 return 0;
2244 }
2245
2246 /**
2247 * create_smb2_pipe() - create IPC pipe
2248 * @work: smb work containing request buffer
2249 *
2250 * Return: 0 on success, otherwise error
2251 */
2252 static noinline int create_smb2_pipe(struct ksmbd_work *work)
2253 {
2254 struct smb2_create_rsp *rsp;
2255 struct smb2_create_req *req;
2256 int id;
2257 int err;
2258 char *name;
2259
2260 WORK_BUFFERS(work, req, rsp);
2261
2262 name = smb_strndup_from_utf16(req->Buffer, le16_to_cpu(req->NameLength),
2263 1, work->conn->local_nls);
2264 if (IS_ERR(name)) {
2265 rsp->hdr.Status = STATUS_NO_MEMORY;
2266 err = PTR_ERR(name);
2267 goto out;
2268 }
2269
2270 id = ksmbd_session_rpc_open(work->sess, name);
2271 if (id < 0) {
2272 pr_err("Unable to open RPC pipe: %d\n", id);
2273 err = id;
2274 goto out;
2275 }
2276
2277 rsp->hdr.Status = STATUS_SUCCESS;
2278 rsp->StructureSize = cpu_to_le16(89);
2279 rsp->OplockLevel = SMB2_OPLOCK_LEVEL_NONE;
2280 rsp->Flags = 0;
2281 rsp->CreateAction = cpu_to_le32(FILE_OPENED);
2282
2283 rsp->CreationTime = cpu_to_le64(0);
2284 rsp->LastAccessTime = cpu_to_le64(0);
2285 rsp->ChangeTime = cpu_to_le64(0);
2286 rsp->AllocationSize = cpu_to_le64(0);
2287 rsp->EndofFile = cpu_to_le64(0);
2288 rsp->FileAttributes = FILE_ATTRIBUTE_NORMAL_LE;
2289 rsp->Reserved2 = 0;
2290 rsp->VolatileFileId = id;
2291 rsp->PersistentFileId = 0;
2292 rsp->CreateContextsOffset = 0;
2293 rsp->CreateContextsLength = 0;
2294
2295 err = ksmbd_iov_pin_rsp(work, rsp, offsetof(struct smb2_create_rsp, Buffer));
2296 if (err)
2297 goto out;
2298
2299 kfree(name);
2300 return 0;
2301
2302 out:
2303 switch (err) {
2304 case -EINVAL:
2305 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2306 break;
2307 case -ENOSPC:
2308 case -ENOMEM:
2309 rsp->hdr.Status = STATUS_NO_MEMORY;
2310 break;
2311 }
2312
2313 if (!IS_ERR(name))
2314 kfree(name);
2315
2316 smb2_set_err_rsp(work);
2317 return err;
2318 }
2319
2320 /**
2321 * smb2_set_ea() - handler for setting extended attributes using set
2322 * info command
2323 * @eabuf: set info command buffer
2324 * @buf_len: set info command buffer length
2325 * @path: dentry path for get ea
2326 * @get_write: get write access to a mount
2327 *
2328 * Return: 0 on success, otherwise error
2329 */
2330 static int smb2_set_ea(struct smb2_ea_info *eabuf, unsigned int buf_len,
2331 const struct path *path, bool get_write)
2332 {
2333 struct mnt_idmap *idmap = mnt_idmap(path->mnt);
2334 char *attr_name = NULL, *value;
2335 int rc = 0;
2336 unsigned int next = 0;
2337
2338 if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength +
2339 le16_to_cpu(eabuf->EaValueLength))
2340 return -EINVAL;
2341
2342 attr_name = kmalloc(XATTR_NAME_MAX + 1, GFP_KERNEL);
2343 if (!attr_name)
2344 return -ENOMEM;
2345
2346 do {
2347 if (!eabuf->EaNameLength)
2348 goto next;
2349
2350 ksmbd_debug(SMB,
2351 "name : <%s>, name_len : %u, value_len : %u, next : %u\n",
2352 eabuf->name, eabuf->EaNameLength,
2353 le16_to_cpu(eabuf->EaValueLength),
2354 le32_to_cpu(eabuf->NextEntryOffset));
2355
2356 if (eabuf->EaNameLength >
2357 (XATTR_NAME_MAX - XATTR_USER_PREFIX_LEN)) {
2358 rc = -EINVAL;
2359 break;
2360 }
2361
2362 memcpy(attr_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN);
2363 memcpy(&attr_name[XATTR_USER_PREFIX_LEN], eabuf->name,
2364 eabuf->EaNameLength);
2365 attr_name[XATTR_USER_PREFIX_LEN + eabuf->EaNameLength] = '\0';
2366 value = (char *)&eabuf->name + eabuf->EaNameLength + 1;
2367
2368 if (!eabuf->EaValueLength) {
2369 rc = ksmbd_vfs_casexattr_len(idmap,
2370 path->dentry,
2371 attr_name,
2372 XATTR_USER_PREFIX_LEN +
2373 eabuf->EaNameLength);
2374
2375 /* delete the EA only when it exits */
2376 if (rc > 0) {
2377 rc = ksmbd_vfs_remove_xattr(idmap,
2378 path,
2379 attr_name);
2380
2381 if (rc < 0) {
2382 ksmbd_debug(SMB,
2383 "remove xattr failed(%d)\n",
2384 rc);
2385 break;
2386 }
2387 }
2388
2389 /* if the EA doesn't exist, just do nothing. */
2390 rc = 0;
2391 } else {
2392 rc = ksmbd_vfs_setxattr(idmap, path, attr_name, value,
2393 le16_to_cpu(eabuf->EaValueLength),
2394 0, true);
2395 if (rc < 0) {
2396 ksmbd_debug(SMB,
2397 "ksmbd_vfs_setxattr is failed(%d)\n",
2398 rc);
2399 break;
2400 }
2401 }
2402
2403 next:
2404 next = le32_to_cpu(eabuf->NextEntryOffset);
2405 if (next == 0 || buf_len < next)
2406 break;
2407 buf_len -= next;
2408 eabuf = (struct smb2_ea_info *)((char *)eabuf + next);
2409 if (buf_len < sizeof(struct smb2_ea_info)) {
2410 rc = -EINVAL;
2411 break;
2412 }
2413
2414 if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength +
2415 le16_to_cpu(eabuf->EaValueLength)) {
2416 rc = -EINVAL;
2417 break;
2418 }
2419 } while (next != 0);
2420
2421 kfree(attr_name);
2422 return rc;
2423 }
2424
2425 static noinline int smb2_set_stream_name_xattr(const struct path *path,
2426 struct ksmbd_file *fp,
2427 char *stream_name, int s_type)
2428 {
2429 struct mnt_idmap *idmap = mnt_idmap(path->mnt);
2430 size_t xattr_stream_size;
2431 char *xattr_stream_name;
2432 int rc;
2433
2434 rc = ksmbd_vfs_xattr_stream_name(stream_name,
2435 &xattr_stream_name,
2436 &xattr_stream_size,
2437 s_type);
2438 if (rc)
2439 return rc;
2440
2441 fp->stream.name = xattr_stream_name;
2442 fp->stream.size = xattr_stream_size;
2443
2444 /* Check if there is stream prefix in xattr space */
2445 rc = ksmbd_vfs_casexattr_len(idmap,
2446 path->dentry,
2447 xattr_stream_name,
2448 xattr_stream_size);
2449 if (rc >= 0)
2450 return 0;
2451
2452 if (fp->cdoption == FILE_OPEN_LE) {
2453 ksmbd_debug(SMB, "XATTR stream name lookup failed: %d\n", rc);
2454 return -EBADF;
2455 }
2456
2457 rc = ksmbd_vfs_setxattr(idmap, path, xattr_stream_name, NULL, 0, 0, false);
2458 if (rc < 0)
2459 pr_err("Failed to store XATTR stream name :%d\n", rc);
2460 return 0;
2461 }
2462
2463 static int smb2_remove_smb_xattrs(const struct path *path)
2464 {
2465 struct mnt_idmap *idmap = mnt_idmap(path->mnt);
2466 char *name, *xattr_list = NULL;
2467 ssize_t xattr_list_len;
2468 int err = 0;
2469
2470 xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
2471 if (xattr_list_len < 0) {
2472 goto out;
2473 } else if (!xattr_list_len) {
2474 ksmbd_debug(SMB, "empty xattr in the file\n");
2475 goto out;
2476 }
2477
2478 for (name = xattr_list; name - xattr_list < xattr_list_len;
2479 name += strlen(name) + 1) {
2480 ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name));
2481
2482 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN) &&
2483 !strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX,
2484 STREAM_PREFIX_LEN)) {
2485 err = ksmbd_vfs_remove_xattr(idmap, path,
2486 name);
2487 if (err)
2488 ksmbd_debug(SMB, "remove xattr failed : %s\n",
2489 name);
2490 }
2491 }
2492 out:
2493 kvfree(xattr_list);
2494 return err;
2495 }
2496
2497 static int smb2_create_truncate(const struct path *path)
2498 {
2499 int rc = vfs_truncate(path, 0);
2500
2501 if (rc) {
2502 pr_err("vfs_truncate failed, rc %d\n", rc);
2503 return rc;
2504 }
2505
2506 rc = smb2_remove_smb_xattrs(path);
2507 if (rc == -EOPNOTSUPP)
2508 rc = 0;
2509 if (rc)
2510 ksmbd_debug(SMB,
2511 "ksmbd_truncate_stream_name_xattr failed, rc %d\n",
2512 rc);
2513 return rc;
2514 }
2515
2516 static void smb2_new_xattrs(struct ksmbd_tree_connect *tcon, const struct path *path,
2517 struct ksmbd_file *fp)
2518 {
2519 struct xattr_dos_attrib da = {0};
2520 int rc;
2521
2522 if (!test_share_config_flag(tcon->share_conf,
2523 KSMBD_SHARE_FLAG_STORE_DOS_ATTRS))
2524 return;
2525
2526 da.version = 4;
2527 da.attr = le32_to_cpu(fp->f_ci->m_fattr);
2528 da.itime = da.create_time = fp->create_time;
2529 da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME |
2530 XATTR_DOSINFO_ITIME;
2531
2532 rc = ksmbd_vfs_set_dos_attrib_xattr(mnt_idmap(path->mnt), path, &da, true);
2533 if (rc)
2534 ksmbd_debug(SMB, "failed to store file attribute into xattr\n");
2535 }
2536
2537 static void smb2_update_xattrs(struct ksmbd_tree_connect *tcon,
2538 const struct path *path, struct ksmbd_file *fp)
2539 {
2540 struct xattr_dos_attrib da;
2541 int rc;
2542
2543 fp->f_ci->m_fattr &= ~(FILE_ATTRIBUTE_HIDDEN_LE | FILE_ATTRIBUTE_SYSTEM_LE);
2544
2545 /* get FileAttributes from XATTR_NAME_DOS_ATTRIBUTE */
2546 if (!test_share_config_flag(tcon->share_conf,
2547 KSMBD_SHARE_FLAG_STORE_DOS_ATTRS))
2548 return;
2549
2550 rc = ksmbd_vfs_get_dos_attrib_xattr(mnt_idmap(path->mnt),
2551 path->dentry, &da);
2552 if (rc > 0) {
2553 fp->f_ci->m_fattr = cpu_to_le32(da.attr);
2554 fp->create_time = da.create_time;
2555 fp->itime = da.itime;
2556 }
2557 }
2558
2559 static int smb2_creat(struct ksmbd_work *work, struct path *parent_path,
2560 struct path *path, char *name, int open_flags,
2561 umode_t posix_mode, bool is_dir)
2562 {
2563 struct ksmbd_tree_connect *tcon = work->tcon;
2564 struct ksmbd_share_config *share = tcon->share_conf;
2565 umode_t mode;
2566 int rc;
2567
2568 if (!(open_flags & O_CREAT))
2569 return -EBADF;
2570
2571 ksmbd_debug(SMB, "file does not exist, so creating\n");
2572 if (is_dir == true) {
2573 ksmbd_debug(SMB, "creating directory\n");
2574
2575 mode = share_config_directory_mode(share, posix_mode);
2576 rc = ksmbd_vfs_mkdir(work, name, mode);
2577 if (rc)
2578 return rc;
2579 } else {
2580 ksmbd_debug(SMB, "creating regular file\n");
2581
2582 mode = share_config_create_mode(share, posix_mode);
2583 rc = ksmbd_vfs_create(work, name, mode);
2584 if (rc)
2585 return rc;
2586 }
2587
2588 rc = ksmbd_vfs_kern_path_locked(work, name, 0, parent_path, path, 0);
2589 if (rc) {
2590 pr_err("cannot get linux path (%s), err = %d\n",
2591 name, rc);
2592 return rc;
2593 }
2594 return 0;
2595 }
2596
2597 static int smb2_create_sd_buffer(struct ksmbd_work *work,
2598 struct smb2_create_req *req,
2599 const struct path *path)
2600 {
2601 struct create_context *context;
2602 struct create_sd_buf_req *sd_buf;
2603
2604 if (!req->CreateContextsOffset)
2605 return -ENOENT;
2606
2607 /* Parse SD BUFFER create contexts */
2608 context = smb2_find_context_vals(req, SMB2_CREATE_SD_BUFFER, 4);
2609 if (!context)
2610 return -ENOENT;
2611 else if (IS_ERR(context))
2612 return PTR_ERR(context);
2613
2614 ksmbd_debug(SMB,
2615 "Set ACLs using SMB2_CREATE_SD_BUFFER context\n");
2616 sd_buf = (struct create_sd_buf_req *)context;
2617 if (le16_to_cpu(context->DataOffset) +
2618 le32_to_cpu(context->DataLength) <
2619 sizeof(struct create_sd_buf_req))
2620 return -EINVAL;
2621 return set_info_sec(work->conn, work->tcon, path, &sd_buf->ntsd,
2622 le32_to_cpu(sd_buf->ccontext.DataLength), true, false);
2623 }
2624
2625 static void ksmbd_acls_fattr(struct smb_fattr *fattr,
2626 struct mnt_idmap *idmap,
2627 struct inode *inode)
2628 {
2629 vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode);
2630 vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode);
2631
2632 fattr->cf_uid = vfsuid_into_kuid(vfsuid);
2633 fattr->cf_gid = vfsgid_into_kgid(vfsgid);
2634 fattr->cf_mode = inode->i_mode;
2635 fattr->cf_acls = NULL;
2636 fattr->cf_dacls = NULL;
2637
2638 if (IS_ENABLED(CONFIG_FS_POSIX_ACL)) {
2639 fattr->cf_acls = get_inode_acl(inode, ACL_TYPE_ACCESS);
2640 if (S_ISDIR(inode->i_mode))
2641 fattr->cf_dacls = get_inode_acl(inode, ACL_TYPE_DEFAULT);
2642 }
2643 }
2644
2645 /**
2646 * smb2_open() - handler for smb file open request
2647 * @work: smb work containing request buffer
2648 *
2649 * Return: 0 on success, otherwise error
2650 */
2651 int smb2_open(struct ksmbd_work *work)
2652 {
2653 struct ksmbd_conn *conn = work->conn;
2654 struct ksmbd_session *sess = work->sess;
2655 struct ksmbd_tree_connect *tcon = work->tcon;
2656 struct smb2_create_req *req;
2657 struct smb2_create_rsp *rsp;
2658 struct path path, parent_path;
2659 struct ksmbd_share_config *share = tcon->share_conf;
2660 struct ksmbd_file *fp = NULL;
2661 struct file *filp = NULL;
2662 struct mnt_idmap *idmap = NULL;
2663 struct kstat stat;
2664 struct create_context *context;
2665 struct lease_ctx_info *lc = NULL;
2666 struct create_ea_buf_req *ea_buf = NULL;
2667 struct oplock_info *opinfo;
2668 __le32 *next_ptr = NULL;
2669 int req_op_level = 0, open_flags = 0, may_flags = 0, file_info = 0;
2670 int rc = 0;
2671 int contxt_cnt = 0, query_disk_id = 0;
2672 int maximal_access_ctxt = 0, posix_ctxt = 0;
2673 int s_type = 0;
2674 int next_off = 0;
2675 char *name = NULL;
2676 char *stream_name = NULL;
2677 bool file_present = false, created = false, already_permitted = false;
2678 int share_ret, need_truncate = 0;
2679 u64 time;
2680 umode_t posix_mode = 0;
2681 __le32 daccess, maximal_access = 0;
2682 int iov_len = 0;
2683
2684 WORK_BUFFERS(work, req, rsp);
2685
2686 if (req->hdr.NextCommand && !work->next_smb2_rcv_hdr_off &&
2687 (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)) {
2688 ksmbd_debug(SMB, "invalid flag in chained command\n");
2689 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2690 smb2_set_err_rsp(work);
2691 return -EINVAL;
2692 }
2693
2694 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) {
2695 ksmbd_debug(SMB, "IPC pipe create request\n");
2696 return create_smb2_pipe(work);
2697 }
2698
2699 if (req->NameLength) {
2700 if ((req->CreateOptions & FILE_DIRECTORY_FILE_LE) &&
2701 *(char *)req->Buffer == '\\') {
2702 pr_err("not allow directory name included leading slash\n");
2703 rc = -EINVAL;
2704 goto err_out2;
2705 }
2706
2707 name = smb2_get_name(req->Buffer,
2708 le16_to_cpu(req->NameLength),
2709 work->conn->local_nls);
2710 if (IS_ERR(name)) {
2711 rc = PTR_ERR(name);
2712 if (rc != -ENOMEM)
2713 rc = -ENOENT;
2714 name = NULL;
2715 goto err_out2;
2716 }
2717
2718 ksmbd_debug(SMB, "converted name = %s\n", name);
2719 if (strchr(name, ':')) {
2720 if (!test_share_config_flag(work->tcon->share_conf,
2721 KSMBD_SHARE_FLAG_STREAMS)) {
2722 rc = -EBADF;
2723 goto err_out2;
2724 }
2725 rc = parse_stream_name(name, &stream_name, &s_type);
2726 if (rc < 0)
2727 goto err_out2;
2728 }
2729
2730 rc = ksmbd_validate_filename(name);
2731 if (rc < 0)
2732 goto err_out2;
2733
2734 if (ksmbd_share_veto_filename(share, name)) {
2735 rc = -ENOENT;
2736 ksmbd_debug(SMB, "Reject open(), vetoed file: %s\n",
2737 name);
2738 goto err_out2;
2739 }
2740 } else {
2741 name = kstrdup("", GFP_KERNEL);
2742 if (!name) {
2743 rc = -ENOMEM;
2744 goto err_out2;
2745 }
2746 }
2747
2748 if (le32_to_cpu(req->ImpersonationLevel) > le32_to_cpu(IL_DELEGATE)) {
2749 pr_err("Invalid impersonationlevel : 0x%x\n",
2750 le32_to_cpu(req->ImpersonationLevel));
2751 rc = -EIO;
2752 rsp->hdr.Status = STATUS_BAD_IMPERSONATION_LEVEL;
2753 goto err_out2;
2754 }
2755
2756 if (req->CreateOptions && !(req->CreateOptions & CREATE_OPTIONS_MASK_LE)) {
2757 pr_err("Invalid create options : 0x%x\n",
2758 le32_to_cpu(req->CreateOptions));
2759 rc = -EINVAL;
2760 goto err_out2;
2761 } else {
2762 if (req->CreateOptions & FILE_SEQUENTIAL_ONLY_LE &&
2763 req->CreateOptions & FILE_RANDOM_ACCESS_LE)
2764 req->CreateOptions = ~(FILE_SEQUENTIAL_ONLY_LE);
2765
2766 if (req->CreateOptions &
2767 (FILE_OPEN_BY_FILE_ID_LE | CREATE_TREE_CONNECTION |
2768 FILE_RESERVE_OPFILTER_LE)) {
2769 rc = -EOPNOTSUPP;
2770 goto err_out2;
2771 }
2772
2773 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) {
2774 if (req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE) {
2775 rc = -EINVAL;
2776 goto err_out2;
2777 } else if (req->CreateOptions & FILE_NO_COMPRESSION_LE) {
2778 req->CreateOptions = ~(FILE_NO_COMPRESSION_LE);
2779 }
2780 }
2781 }
2782
2783 if (le32_to_cpu(req->CreateDisposition) >
2784 le32_to_cpu(FILE_OVERWRITE_IF_LE)) {
2785 pr_err("Invalid create disposition : 0x%x\n",
2786 le32_to_cpu(req->CreateDisposition));
2787 rc = -EINVAL;
2788 goto err_out2;
2789 }
2790
2791 if (!(req->DesiredAccess & DESIRED_ACCESS_MASK)) {
2792 pr_err("Invalid desired access : 0x%x\n",
2793 le32_to_cpu(req->DesiredAccess));
2794 rc = -EACCES;
2795 goto err_out2;
2796 }
2797
2798 if (req->FileAttributes && !(req->FileAttributes & FILE_ATTRIBUTE_MASK_LE)) {
2799 pr_err("Invalid file attribute : 0x%x\n",
2800 le32_to_cpu(req->FileAttributes));
2801 rc = -EINVAL;
2802 goto err_out2;
2803 }
2804
2805 if (req->CreateContextsOffset) {
2806 /* Parse non-durable handle create contexts */
2807 context = smb2_find_context_vals(req, SMB2_CREATE_EA_BUFFER, 4);
2808 if (IS_ERR(context)) {
2809 rc = PTR_ERR(context);
2810 goto err_out2;
2811 } else if (context) {
2812 ea_buf = (struct create_ea_buf_req *)context;
2813 if (le16_to_cpu(context->DataOffset) +
2814 le32_to_cpu(context->DataLength) <
2815 sizeof(struct create_ea_buf_req)) {
2816 rc = -EINVAL;
2817 goto err_out2;
2818 }
2819 if (req->CreateOptions & FILE_NO_EA_KNOWLEDGE_LE) {
2820 rsp->hdr.Status = STATUS_ACCESS_DENIED;
2821 rc = -EACCES;
2822 goto err_out2;
2823 }
2824 }
2825
2826 context = smb2_find_context_vals(req,
2827 SMB2_CREATE_QUERY_MAXIMAL_ACCESS_REQUEST, 4);
2828 if (IS_ERR(context)) {
2829 rc = PTR_ERR(context);
2830 goto err_out2;
2831 } else if (context) {
2832 ksmbd_debug(SMB,
2833 "get query maximal access context\n");
2834 maximal_access_ctxt = 1;
2835 }
2836
2837 context = smb2_find_context_vals(req,
2838 SMB2_CREATE_TIMEWARP_REQUEST, 4);
2839 if (IS_ERR(context)) {
2840 rc = PTR_ERR(context);
2841 goto err_out2;
2842 } else if (context) {
2843 ksmbd_debug(SMB, "get timewarp context\n");
2844 rc = -EBADF;
2845 goto err_out2;
2846 }
2847
2848 if (tcon->posix_extensions) {
2849 context = smb2_find_context_vals(req,
2850 SMB2_CREATE_TAG_POSIX, 16);
2851 if (IS_ERR(context)) {
2852 rc = PTR_ERR(context);
2853 goto err_out2;
2854 } else if (context) {
2855 struct create_posix *posix =
2856 (struct create_posix *)context;
2857 if (le16_to_cpu(context->DataOffset) +
2858 le32_to_cpu(context->DataLength) <
2859 sizeof(struct create_posix) - 4) {
2860 rc = -EINVAL;
2861 goto err_out2;
2862 }
2863 ksmbd_debug(SMB, "get posix context\n");
2864
2865 posix_mode = le32_to_cpu(posix->Mode);
2866 posix_ctxt = 1;
2867 }
2868 }
2869 }
2870
2871 if (ksmbd_override_fsids(work)) {
2872 rc = -ENOMEM;
2873 goto err_out2;
2874 }
2875
2876 rc = ksmbd_vfs_kern_path_locked(work, name, LOOKUP_NO_SYMLINKS,
2877 &parent_path, &path, 1);
2878 if (!rc) {
2879 file_present = true;
2880
2881 if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE) {
2882 /*
2883 * If file exists with under flags, return access
2884 * denied error.
2885 */
2886 if (req->CreateDisposition == FILE_OVERWRITE_IF_LE ||
2887 req->CreateDisposition == FILE_OPEN_IF_LE) {
2888 rc = -EACCES;
2889 goto err_out;
2890 }
2891
2892 if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
2893 ksmbd_debug(SMB,
2894 "User does not have write permission\n");
2895 rc = -EACCES;
2896 goto err_out;
2897 }
2898 } else if (d_is_symlink(path.dentry)) {
2899 rc = -EACCES;
2900 goto err_out;
2901 }
2902
2903 file_present = true;
2904 idmap = mnt_idmap(path.mnt);
2905 } else {
2906 if (rc != -ENOENT)
2907 goto err_out;
2908 ksmbd_debug(SMB, "can not get linux path for %s, rc = %d\n",
2909 name, rc);
2910 rc = 0;
2911 }
2912
2913 if (stream_name) {
2914 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) {
2915 if (s_type == DATA_STREAM) {
2916 rc = -EIO;
2917 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
2918 }
2919 } else {
2920 if (file_present && S_ISDIR(d_inode(path.dentry)->i_mode) &&
2921 s_type == DATA_STREAM) {
2922 rc = -EIO;
2923 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
2924 }
2925 }
2926
2927 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE &&
2928 req->FileAttributes & FILE_ATTRIBUTE_NORMAL_LE) {
2929 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
2930 rc = -EIO;
2931 }
2932
2933 if (rc < 0)
2934 goto err_out;
2935 }
2936
2937 if (file_present && req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE &&
2938 S_ISDIR(d_inode(path.dentry)->i_mode) &&
2939 !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
2940 ksmbd_debug(SMB, "open() argument is a directory: %s, %x\n",
2941 name, req->CreateOptions);
2942 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
2943 rc = -EIO;
2944 goto err_out;
2945 }
2946
2947 if (file_present && (req->CreateOptions & FILE_DIRECTORY_FILE_LE) &&
2948 !(req->CreateDisposition == FILE_CREATE_LE) &&
2949 !S_ISDIR(d_inode(path.dentry)->i_mode)) {
2950 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
2951 rc = -EIO;
2952 goto err_out;
2953 }
2954
2955 if (!stream_name && file_present &&
2956 req->CreateDisposition == FILE_CREATE_LE) {
2957 rc = -EEXIST;
2958 goto err_out;
2959 }
2960
2961 daccess = smb_map_generic_desired_access(req->DesiredAccess);
2962
2963 if (file_present && !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
2964 rc = smb_check_perm_dacl(conn, &path, &daccess,
2965 sess->user->uid);
2966 if (rc)
2967 goto err_out;
2968 }
2969
2970 if (daccess & FILE_MAXIMAL_ACCESS_LE) {
2971 if (!file_present) {
2972 daccess = cpu_to_le32(GENERIC_ALL_FLAGS);
2973 } else {
2974 ksmbd_vfs_query_maximal_access(idmap,
2975 path.dentry,
2976 &daccess);
2977 already_permitted = true;
2978 }
2979 maximal_access = daccess;
2980 }
2981
2982 open_flags = smb2_create_open_flags(file_present, daccess,
2983 req->CreateDisposition,
2984 &may_flags);
2985
2986 if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
2987 if (open_flags & (O_CREAT | O_TRUNC)) {
2988 ksmbd_debug(SMB,
2989 "User does not have write permission\n");
2990 rc = -EACCES;
2991 goto err_out;
2992 }
2993 }
2994
2995 /*create file if not present */
2996 if (!file_present) {
2997 rc = smb2_creat(work, &parent_path, &path, name, open_flags,
2998 posix_mode,
2999 req->CreateOptions & FILE_DIRECTORY_FILE_LE);
3000 if (rc) {
3001 if (rc == -ENOENT) {
3002 rc = -EIO;
3003 rsp->hdr.Status = STATUS_OBJECT_PATH_NOT_FOUND;
3004 }
3005 goto err_out;
3006 }
3007
3008 created = true;
3009 idmap = mnt_idmap(path.mnt);
3010 if (ea_buf) {
3011 if (le32_to_cpu(ea_buf->ccontext.DataLength) <
3012 sizeof(struct smb2_ea_info)) {
3013 rc = -EINVAL;
3014 goto err_out;
3015 }
3016
3017 rc = smb2_set_ea(&ea_buf->ea,
3018 le32_to_cpu(ea_buf->ccontext.DataLength),
3019 &path, false);
3020 if (rc == -EOPNOTSUPP)
3021 rc = 0;
3022 else if (rc)
3023 goto err_out;
3024 }
3025 } else if (!already_permitted) {
3026 /* FILE_READ_ATTRIBUTE is allowed without inode_permission,
3027 * because execute(search) permission on a parent directory,
3028 * is already granted.
3029 */
3030 if (daccess & ~(FILE_READ_ATTRIBUTES_LE | FILE_READ_CONTROL_LE)) {
3031 rc = inode_permission(idmap,
3032 d_inode(path.dentry),
3033 may_flags);
3034 if (rc)
3035 goto err_out;
3036
3037 if ((daccess & FILE_DELETE_LE) ||
3038 (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
3039 rc = inode_permission(idmap,
3040 d_inode(path.dentry->d_parent),
3041 MAY_EXEC | MAY_WRITE);
3042 if (rc)
3043 goto err_out;
3044 }
3045 }
3046 }
3047
3048 rc = ksmbd_query_inode_status(path.dentry->d_parent);
3049 if (rc == KSMBD_INODE_STATUS_PENDING_DELETE) {
3050 rc = -EBUSY;
3051 goto err_out;
3052 }
3053
3054 rc = 0;
3055 filp = dentry_open(&path, open_flags, current_cred());
3056 if (IS_ERR(filp)) {
3057 rc = PTR_ERR(filp);
3058 pr_err("dentry open for dir failed, rc %d\n", rc);
3059 goto err_out;
3060 }
3061
3062 if (file_present) {
3063 if (!(open_flags & O_TRUNC))
3064 file_info = FILE_OPENED;
3065 else
3066 file_info = FILE_OVERWRITTEN;
3067
3068 if ((req->CreateDisposition & FILE_CREATE_MASK_LE) ==
3069 FILE_SUPERSEDE_LE)
3070 file_info = FILE_SUPERSEDED;
3071 } else if (open_flags & O_CREAT) {
3072 file_info = FILE_CREATED;
3073 }
3074
3075 ksmbd_vfs_set_fadvise(filp, req->CreateOptions);
3076
3077 /* Obtain Volatile-ID */
3078 fp = ksmbd_open_fd(work, filp);
3079 if (IS_ERR(fp)) {
3080 fput(filp);
3081 rc = PTR_ERR(fp);
3082 fp = NULL;
3083 goto err_out;
3084 }
3085
3086 /* Get Persistent-ID */
3087 ksmbd_open_durable_fd(fp);
3088 if (!has_file_id(fp->persistent_id)) {
3089 rc = -ENOMEM;
3090 goto err_out;
3091 }
3092
3093 fp->cdoption = req->CreateDisposition;
3094 fp->daccess = daccess;
3095 fp->saccess = req->ShareAccess;
3096 fp->coption = req->CreateOptions;
3097
3098 /* Set default windows and posix acls if creating new file */
3099 if (created) {
3100 int posix_acl_rc;
3101 struct inode *inode = d_inode(path.dentry);
3102
3103 posix_acl_rc = ksmbd_vfs_inherit_posix_acl(idmap,
3104 &path,
3105 d_inode(path.dentry->d_parent));
3106 if (posix_acl_rc)
3107 ksmbd_debug(SMB, "inherit posix acl failed : %d\n", posix_acl_rc);
3108
3109 if (test_share_config_flag(work->tcon->share_conf,
3110 KSMBD_SHARE_FLAG_ACL_XATTR)) {
3111 rc = smb_inherit_dacl(conn, &path, sess->user->uid,
3112 sess->user->gid);
3113 }
3114
3115 if (rc) {
3116 rc = smb2_create_sd_buffer(work, req, &path);
3117 if (rc) {
3118 if (posix_acl_rc)
3119 ksmbd_vfs_set_init_posix_acl(idmap,
3120 &path);
3121
3122 if (test_share_config_flag(work->tcon->share_conf,
3123 KSMBD_SHARE_FLAG_ACL_XATTR)) {
3124 struct smb_fattr fattr;
3125 struct smb_ntsd *pntsd;
3126 int pntsd_size, ace_num = 0;
3127
3128 ksmbd_acls_fattr(&fattr, idmap, inode);
3129 if (fattr.cf_acls)
3130 ace_num = fattr.cf_acls->a_count;
3131 if (fattr.cf_dacls)
3132 ace_num += fattr.cf_dacls->a_count;
3133
3134 pntsd = kmalloc(sizeof(struct smb_ntsd) +
3135 sizeof(struct smb_sid) * 3 +
3136 sizeof(struct smb_acl) +
3137 sizeof(struct smb_ace) * ace_num * 2,
3138 GFP_KERNEL);
3139 if (!pntsd) {
3140 posix_acl_release(fattr.cf_acls);
3141 posix_acl_release(fattr.cf_dacls);
3142 goto err_out;
3143 }
3144
3145 rc = build_sec_desc(idmap,
3146 pntsd, NULL, 0,
3147 OWNER_SECINFO |
3148 GROUP_SECINFO |
3149 DACL_SECINFO,
3150 &pntsd_size, &fattr);
3151 posix_acl_release(fattr.cf_acls);
3152 posix_acl_release(fattr.cf_dacls);
3153 if (rc) {
3154 kfree(pntsd);
3155 goto err_out;
3156 }
3157
3158 rc = ksmbd_vfs_set_sd_xattr(conn,
3159 idmap,
3160 &path,
3161 pntsd,
3162 pntsd_size,
3163 false);
3164 kfree(pntsd);
3165 if (rc)
3166 pr_err("failed to store ntacl in xattr : %d\n",
3167 rc);
3168 }
3169 }
3170 }
3171 rc = 0;
3172 }
3173
3174 if (stream_name) {
3175 rc = smb2_set_stream_name_xattr(&path,
3176 fp,
3177 stream_name,
3178 s_type);
3179 if (rc)
3180 goto err_out;
3181 file_info = FILE_CREATED;
3182 }
3183
3184 fp->attrib_only = !(req->DesiredAccess & ~(FILE_READ_ATTRIBUTES_LE |
3185 FILE_WRITE_ATTRIBUTES_LE | FILE_SYNCHRONIZE_LE));
3186
3187 /* fp should be searchable through ksmbd_inode.m_fp_list
3188 * after daccess, saccess, attrib_only, and stream are
3189 * initialized.
3190 */
3191 write_lock(&fp->f_ci->m_lock);
3192 list_add(&fp->node, &fp->f_ci->m_fp_list);
3193 write_unlock(&fp->f_ci->m_lock);
3194
3195 /* Check delete pending among previous fp before oplock break */
3196 if (ksmbd_inode_pending_delete(fp)) {
3197 rc = -EBUSY;
3198 goto err_out;
3199 }
3200
3201 if (file_present || created)
3202 ksmbd_vfs_kern_path_unlock(&parent_path, &path);
3203
3204 if (!S_ISDIR(file_inode(filp)->i_mode) && open_flags & O_TRUNC &&
3205 !fp->attrib_only && !stream_name) {
3206 smb_break_all_oplock(work, fp);
3207 need_truncate = 1;
3208 }
3209
3210 req_op_level = req->RequestedOplockLevel;
3211 if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE)
3212 lc = parse_lease_state(req, S_ISDIR(file_inode(filp)->i_mode));
3213
3214 share_ret = ksmbd_smb_check_shared_mode(fp->filp, fp);
3215 if (!test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_OPLOCKS) ||
3216 (req_op_level == SMB2_OPLOCK_LEVEL_LEASE &&
3217 !(conn->vals->capabilities & SMB2_GLOBAL_CAP_LEASING))) {
3218 if (share_ret < 0 && !S_ISDIR(file_inode(fp->filp)->i_mode)) {
3219 rc = share_ret;
3220 goto err_out1;
3221 }
3222 } else {
3223 if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE) {
3224 /*
3225 * Compare parent lease using parent key. If there is no
3226 * a lease that has same parent key, Send lease break
3227 * notification.
3228 */
3229 smb_send_parent_lease_break_noti(fp, lc);
3230
3231 req_op_level = smb2_map_lease_to_oplock(lc->req_state);
3232 ksmbd_debug(SMB,
3233 "lease req for(%s) req oplock state 0x%x, lease state 0x%x\n",
3234 name, req_op_level, lc->req_state);
3235 rc = find_same_lease_key(sess, fp->f_ci, lc);
3236 if (rc)
3237 goto err_out1;
3238 } else if (open_flags == O_RDONLY &&
3239 (req_op_level == SMB2_OPLOCK_LEVEL_BATCH ||
3240 req_op_level == SMB2_OPLOCK_LEVEL_EXCLUSIVE))
3241 req_op_level = SMB2_OPLOCK_LEVEL_II;
3242
3243 rc = smb_grant_oplock(work, req_op_level,
3244 fp->persistent_id, fp,
3245 le32_to_cpu(req->hdr.Id.SyncId.TreeId),
3246 lc, share_ret);
3247 if (rc < 0)
3248 goto err_out1;
3249 }
3250
3251 if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)
3252 ksmbd_fd_set_delete_on_close(fp, file_info);
3253
3254 if (need_truncate) {
3255 rc = smb2_create_truncate(&fp->filp->f_path);
3256 if (rc)
3257 goto err_out1;
3258 }
3259
3260 if (req->CreateContextsOffset) {
3261 struct create_alloc_size_req *az_req;
3262
3263 az_req = (struct create_alloc_size_req *)smb2_find_context_vals(req,
3264 SMB2_CREATE_ALLOCATION_SIZE, 4);
3265 if (IS_ERR(az_req)) {
3266 rc = PTR_ERR(az_req);
3267 goto err_out1;
3268 } else if (az_req) {
3269 loff_t alloc_size;
3270 int err;
3271
3272 if (le16_to_cpu(az_req->ccontext.DataOffset) +
3273 le32_to_cpu(az_req->ccontext.DataLength) <
3274 sizeof(struct create_alloc_size_req)) {
3275 rc = -EINVAL;
3276 goto err_out1;
3277 }
3278 alloc_size = le64_to_cpu(az_req->AllocationSize);
3279 ksmbd_debug(SMB,
3280 "request smb2 create allocate size : %llu\n",
3281 alloc_size);
3282 smb_break_all_levII_oplock(work, fp, 1);
3283 err = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0,
3284 alloc_size);
3285 if (err < 0)
3286 ksmbd_debug(SMB,
3287 "vfs_fallocate is failed : %d\n",
3288 err);
3289 }
3290
3291 context = smb2_find_context_vals(req, SMB2_CREATE_QUERY_ON_DISK_ID, 4);
3292 if (IS_ERR(context)) {
3293 rc = PTR_ERR(context);
3294 goto err_out1;
3295 } else if (context) {
3296 ksmbd_debug(SMB, "get query on disk id context\n");
3297 query_disk_id = 1;
3298 }
3299 }
3300
3301 rc = ksmbd_vfs_getattr(&path, &stat);
3302 if (rc)
3303 goto err_out1;
3304
3305 if (stat.result_mask & STATX_BTIME)
3306 fp->create_time = ksmbd_UnixTimeToNT(stat.btime);
3307 else
3308 fp->create_time = ksmbd_UnixTimeToNT(stat.ctime);
3309 if (req->FileAttributes || fp->f_ci->m_fattr == 0)
3310 fp->f_ci->m_fattr =
3311 cpu_to_le32(smb2_get_dos_mode(&stat, le32_to_cpu(req->FileAttributes)));
3312
3313 if (!created)
3314 smb2_update_xattrs(tcon, &path, fp);
3315 else
3316 smb2_new_xattrs(tcon, &path, fp);
3317
3318 memcpy(fp->client_guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE);
3319
3320 rsp->StructureSize = cpu_to_le16(89);
3321 rcu_read_lock();
3322 opinfo = rcu_dereference(fp->f_opinfo);
3323 rsp->OplockLevel = opinfo != NULL ? opinfo->level : 0;
3324 rcu_read_unlock();
3325 rsp->Flags = 0;
3326 rsp->CreateAction = cpu_to_le32(file_info);
3327 rsp->CreationTime = cpu_to_le64(fp->create_time);
3328 time = ksmbd_UnixTimeToNT(stat.atime);
3329 rsp->LastAccessTime = cpu_to_le64(time);
3330 time = ksmbd_UnixTimeToNT(stat.mtime);
3331 rsp->LastWriteTime = cpu_to_le64(time);
3332 time = ksmbd_UnixTimeToNT(stat.ctime);
3333 rsp->ChangeTime = cpu_to_le64(time);
3334 rsp->AllocationSize = S_ISDIR(stat.mode) ? 0 :
3335 cpu_to_le64(stat.blocks << 9);
3336 rsp->EndofFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
3337 rsp->FileAttributes = fp->f_ci->m_fattr;
3338
3339 rsp->Reserved2 = 0;
3340
3341 rsp->PersistentFileId = fp->persistent_id;
3342 rsp->VolatileFileId = fp->volatile_id;
3343
3344 rsp->CreateContextsOffset = 0;
3345 rsp->CreateContextsLength = 0;
3346 iov_len = offsetof(struct smb2_create_rsp, Buffer);
3347
3348 /* If lease is request send lease context response */
3349 if (opinfo && opinfo->is_lease) {
3350 struct create_context *lease_ccontext;
3351
3352 ksmbd_debug(SMB, "lease granted on(%s) lease state 0x%x\n",
3353 name, opinfo->o_lease->state);
3354 rsp->OplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
3355
3356 lease_ccontext = (struct create_context *)rsp->Buffer;
3357 contxt_cnt++;
3358 create_lease_buf(rsp->Buffer, opinfo->o_lease);
3359 le32_add_cpu(&rsp->CreateContextsLength,
3360 conn->vals->create_lease_size);
3361 iov_len += conn->vals->create_lease_size;
3362 next_ptr = &lease_ccontext->Next;
3363 next_off = conn->vals->create_lease_size;
3364 }
3365
3366 if (maximal_access_ctxt) {
3367 struct create_context *mxac_ccontext;
3368
3369 if (maximal_access == 0)
3370 ksmbd_vfs_query_maximal_access(idmap,
3371 path.dentry,
3372 &maximal_access);
3373 mxac_ccontext = (struct create_context *)(rsp->Buffer +
3374 le32_to_cpu(rsp->CreateContextsLength));
3375 contxt_cnt++;
3376 create_mxac_rsp_buf(rsp->Buffer +
3377 le32_to_cpu(rsp->CreateContextsLength),
3378 le32_to_cpu(maximal_access));
3379 le32_add_cpu(&rsp->CreateContextsLength,
3380 conn->vals->create_mxac_size);
3381 iov_len += conn->vals->create_mxac_size;
3382 if (next_ptr)
3383 *next_ptr = cpu_to_le32(next_off);
3384 next_ptr = &mxac_ccontext->Next;
3385 next_off = conn->vals->create_mxac_size;
3386 }
3387
3388 if (query_disk_id) {
3389 struct create_context *disk_id_ccontext;
3390
3391 disk_id_ccontext = (struct create_context *)(rsp->Buffer +
3392 le32_to_cpu(rsp->CreateContextsLength));
3393 contxt_cnt++;
3394 create_disk_id_rsp_buf(rsp->Buffer +
3395 le32_to_cpu(rsp->CreateContextsLength),
3396 stat.ino, tcon->id);
3397 le32_add_cpu(&rsp->CreateContextsLength,
3398 conn->vals->create_disk_id_size);
3399 iov_len += conn->vals->create_disk_id_size;
3400 if (next_ptr)
3401 *next_ptr = cpu_to_le32(next_off);
3402 next_ptr = &disk_id_ccontext->Next;
3403 next_off = conn->vals->create_disk_id_size;
3404 }
3405
3406 if (posix_ctxt) {
3407 contxt_cnt++;
3408 create_posix_rsp_buf(rsp->Buffer +
3409 le32_to_cpu(rsp->CreateContextsLength),
3410 fp);
3411 le32_add_cpu(&rsp->CreateContextsLength,
3412 conn->vals->create_posix_size);
3413 iov_len += conn->vals->create_posix_size;
3414 if (next_ptr)
3415 *next_ptr = cpu_to_le32(next_off);
3416 }
3417
3418 if (contxt_cnt > 0) {
3419 rsp->CreateContextsOffset =
3420 cpu_to_le32(offsetof(struct smb2_create_rsp, Buffer));
3421 }
3422
3423 err_out:
3424 if (rc && (file_present || created))
3425 ksmbd_vfs_kern_path_unlock(&parent_path, &path);
3426
3427 err_out1:
3428 ksmbd_revert_fsids(work);
3429
3430 err_out2:
3431 if (!rc) {
3432 ksmbd_update_fstate(&work->sess->file_table, fp, FP_INITED);
3433 rc = ksmbd_iov_pin_rsp(work, (void *)rsp, iov_len);
3434 }
3435 if (rc) {
3436 if (rc == -EINVAL)
3437 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
3438 else if (rc == -EOPNOTSUPP)
3439 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
3440 else if (rc == -EACCES || rc == -ESTALE || rc == -EXDEV)
3441 rsp->hdr.Status = STATUS_ACCESS_DENIED;
3442 else if (rc == -ENOENT)
3443 rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID;
3444 else if (rc == -EPERM)
3445 rsp->hdr.Status = STATUS_SHARING_VIOLATION;
3446 else if (rc == -EBUSY)
3447 rsp->hdr.Status = STATUS_DELETE_PENDING;
3448 else if (rc == -EBADF)
3449 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
3450 else if (rc == -ENOEXEC)
3451 rsp->hdr.Status = STATUS_DUPLICATE_OBJECTID;
3452 else if (rc == -ENXIO)
3453 rsp->hdr.Status = STATUS_NO_SUCH_DEVICE;
3454 else if (rc == -EEXIST)
3455 rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION;
3456 else if (rc == -EMFILE)
3457 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
3458 if (!rsp->hdr.Status)
3459 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
3460
3461 if (fp)
3462 ksmbd_fd_put(work, fp);
3463 smb2_set_err_rsp(work);
3464 ksmbd_debug(SMB, "Error response: %x\n", rsp->hdr.Status);
3465 }
3466
3467 kfree(name);
3468 kfree(lc);
3469
3470 return 0;
3471 }
3472
3473 static int readdir_info_level_struct_sz(int info_level)
3474 {
3475 switch (info_level) {
3476 case FILE_FULL_DIRECTORY_INFORMATION:
3477 return sizeof(struct file_full_directory_info);
3478 case FILE_BOTH_DIRECTORY_INFORMATION:
3479 return sizeof(struct file_both_directory_info);
3480 case FILE_DIRECTORY_INFORMATION:
3481 return sizeof(struct file_directory_info);
3482 case FILE_NAMES_INFORMATION:
3483 return sizeof(struct file_names_info);
3484 case FILEID_FULL_DIRECTORY_INFORMATION:
3485 return sizeof(struct file_id_full_dir_info);
3486 case FILEID_BOTH_DIRECTORY_INFORMATION:
3487 return sizeof(struct file_id_both_directory_info);
3488 case SMB_FIND_FILE_POSIX_INFO:
3489 return sizeof(struct smb2_posix_info);
3490 default:
3491 return -EOPNOTSUPP;
3492 }
3493 }
3494
3495 static int dentry_name(struct ksmbd_dir_info *d_info, int info_level)
3496 {
3497 switch (info_level) {
3498 case FILE_FULL_DIRECTORY_INFORMATION:
3499 {
3500 struct file_full_directory_info *ffdinfo;
3501
3502 ffdinfo = (struct file_full_directory_info *)d_info->rptr;
3503 d_info->rptr += le32_to_cpu(ffdinfo->NextEntryOffset);
3504 d_info->name = ffdinfo->FileName;
3505 d_info->name_len = le32_to_cpu(ffdinfo->FileNameLength);
3506 return 0;
3507 }
3508 case FILE_BOTH_DIRECTORY_INFORMATION:
3509 {
3510 struct file_both_directory_info *fbdinfo;
3511
3512 fbdinfo = (struct file_both_directory_info *)d_info->rptr;
3513 d_info->rptr += le32_to_cpu(fbdinfo->NextEntryOffset);
3514 d_info->name = fbdinfo->FileName;
3515 d_info->name_len = le32_to_cpu(fbdinfo->FileNameLength);
3516 return 0;
3517 }
3518 case FILE_DIRECTORY_INFORMATION:
3519 {
3520 struct file_directory_info *fdinfo;
3521
3522 fdinfo = (struct file_directory_info *)d_info->rptr;
3523 d_info->rptr += le32_to_cpu(fdinfo->NextEntryOffset);
3524 d_info->name = fdinfo->FileName;
3525 d_info->name_len = le32_to_cpu(fdinfo->FileNameLength);
3526 return 0;
3527 }
3528 case FILE_NAMES_INFORMATION:
3529 {
3530 struct file_names_info *fninfo;
3531
3532 fninfo = (struct file_names_info *)d_info->rptr;
3533 d_info->rptr += le32_to_cpu(fninfo->NextEntryOffset);
3534 d_info->name = fninfo->FileName;
3535 d_info->name_len = le32_to_cpu(fninfo->FileNameLength);
3536 return 0;
3537 }
3538 case FILEID_FULL_DIRECTORY_INFORMATION:
3539 {
3540 struct file_id_full_dir_info *dinfo;
3541
3542 dinfo = (struct file_id_full_dir_info *)d_info->rptr;
3543 d_info->rptr += le32_to_cpu(dinfo->NextEntryOffset);
3544 d_info->name = dinfo->FileName;
3545 d_info->name_len = le32_to_cpu(dinfo->FileNameLength);
3546 return 0;
3547 }
3548 case FILEID_BOTH_DIRECTORY_INFORMATION:
3549 {
3550 struct file_id_both_directory_info *fibdinfo;
3551
3552 fibdinfo = (struct file_id_both_directory_info *)d_info->rptr;
3553 d_info->rptr += le32_to_cpu(fibdinfo->NextEntryOffset);
3554 d_info->name = fibdinfo->FileName;
3555 d_info->name_len = le32_to_cpu(fibdinfo->FileNameLength);
3556 return 0;
3557 }
3558 case SMB_FIND_FILE_POSIX_INFO:
3559 {
3560 struct smb2_posix_info *posix_info;
3561
3562 posix_info = (struct smb2_posix_info *)d_info->rptr;
3563 d_info->rptr += le32_to_cpu(posix_info->NextEntryOffset);
3564 d_info->name = posix_info->name;
3565 d_info->name_len = le32_to_cpu(posix_info->name_len);
3566 return 0;
3567 }
3568 default:
3569 return -EINVAL;
3570 }
3571 }
3572
3573 /**
3574 * smb2_populate_readdir_entry() - encode directory entry in smb2 response
3575 * buffer
3576 * @conn: connection instance
3577 * @info_level: smb information level
3578 * @d_info: structure included variables for query dir
3579 * @ksmbd_kstat: ksmbd wrapper of dirent stat information
3580 *
3581 * if directory has many entries, find first can't read it fully.
3582 * find next might be called multiple times to read remaining dir entries
3583 *
3584 * Return: 0 on success, otherwise error
3585 */
3586 static int smb2_populate_readdir_entry(struct ksmbd_conn *conn, int info_level,
3587 struct ksmbd_dir_info *d_info,
3588 struct ksmbd_kstat *ksmbd_kstat)
3589 {
3590 int next_entry_offset = 0;
3591 char *conv_name;
3592 int conv_len;
3593 void *kstat;
3594 int struct_sz, rc = 0;
3595
3596 conv_name = ksmbd_convert_dir_info_name(d_info,
3597 conn->local_nls,
3598 &conv_len);
3599 if (!conv_name)
3600 return -ENOMEM;
3601
3602 /* Somehow the name has only terminating NULL bytes */
3603 if (conv_len < 0) {
3604 rc = -EINVAL;
3605 goto free_conv_name;
3606 }
3607
3608 struct_sz = readdir_info_level_struct_sz(info_level) + conv_len;
3609 next_entry_offset = ALIGN(struct_sz, KSMBD_DIR_INFO_ALIGNMENT);
3610 d_info->last_entry_off_align = next_entry_offset - struct_sz;
3611
3612 if (next_entry_offset > d_info->out_buf_len) {
3613 d_info->out_buf_len = 0;
3614 rc = -ENOSPC;
3615 goto free_conv_name;
3616 }
3617
3618 kstat = d_info->wptr;
3619 if (info_level != FILE_NAMES_INFORMATION)
3620 kstat = ksmbd_vfs_init_kstat(&d_info->wptr, ksmbd_kstat);
3621
3622 switch (info_level) {
3623 case FILE_FULL_DIRECTORY_INFORMATION:
3624 {
3625 struct file_full_directory_info *ffdinfo;
3626
3627 ffdinfo = (struct file_full_directory_info *)kstat;
3628 ffdinfo->FileNameLength = cpu_to_le32(conv_len);
3629 ffdinfo->EaSize =
3630 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3631 if (ffdinfo->EaSize)
3632 ffdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3633 if (d_info->hide_dot_file && d_info->name[0] == '.')
3634 ffdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3635 memcpy(ffdinfo->FileName, conv_name, conv_len);
3636 ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3637 break;
3638 }
3639 case FILE_BOTH_DIRECTORY_INFORMATION:
3640 {
3641 struct file_both_directory_info *fbdinfo;
3642
3643 fbdinfo = (struct file_both_directory_info *)kstat;
3644 fbdinfo->FileNameLength = cpu_to_le32(conv_len);
3645 fbdinfo->EaSize =
3646 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3647 if (fbdinfo->EaSize)
3648 fbdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3649 fbdinfo->ShortNameLength = 0;
3650 fbdinfo->Reserved = 0;
3651 if (d_info->hide_dot_file && d_info->name[0] == '.')
3652 fbdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3653 memcpy(fbdinfo->FileName, conv_name, conv_len);
3654 fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3655 break;
3656 }
3657 case FILE_DIRECTORY_INFORMATION:
3658 {
3659 struct file_directory_info *fdinfo;
3660
3661 fdinfo = (struct file_directory_info *)kstat;
3662 fdinfo->FileNameLength = cpu_to_le32(conv_len);
3663 if (d_info->hide_dot_file && d_info->name[0] == '.')
3664 fdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3665 memcpy(fdinfo->FileName, conv_name, conv_len);
3666 fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3667 break;
3668 }
3669 case FILE_NAMES_INFORMATION:
3670 {
3671 struct file_names_info *fninfo;
3672
3673 fninfo = (struct file_names_info *)kstat;
3674 fninfo->FileNameLength = cpu_to_le32(conv_len);
3675 memcpy(fninfo->FileName, conv_name, conv_len);
3676 fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3677 break;
3678 }
3679 case FILEID_FULL_DIRECTORY_INFORMATION:
3680 {
3681 struct file_id_full_dir_info *dinfo;
3682
3683 dinfo = (struct file_id_full_dir_info *)kstat;
3684 dinfo->FileNameLength = cpu_to_le32(conv_len);
3685 dinfo->EaSize =
3686 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3687 if (dinfo->EaSize)
3688 dinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3689 dinfo->Reserved = 0;
3690 dinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino);
3691 if (d_info->hide_dot_file && d_info->name[0] == '.')
3692 dinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3693 memcpy(dinfo->FileName, conv_name, conv_len);
3694 dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3695 break;
3696 }
3697 case FILEID_BOTH_DIRECTORY_INFORMATION:
3698 {
3699 struct file_id_both_directory_info *fibdinfo;
3700
3701 fibdinfo = (struct file_id_both_directory_info *)kstat;
3702 fibdinfo->FileNameLength = cpu_to_le32(conv_len);
3703 fibdinfo->EaSize =
3704 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3705 if (fibdinfo->EaSize)
3706 fibdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3707 fibdinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino);
3708 fibdinfo->ShortNameLength = 0;
3709 fibdinfo->Reserved = 0;
3710 fibdinfo->Reserved2 = cpu_to_le16(0);
3711 if (d_info->hide_dot_file && d_info->name[0] == '.')
3712 fibdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3713 memcpy(fibdinfo->FileName, conv_name, conv_len);
3714 fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3715 break;
3716 }
3717 case SMB_FIND_FILE_POSIX_INFO:
3718 {
3719 struct smb2_posix_info *posix_info;
3720 u64 time;
3721
3722 posix_info = (struct smb2_posix_info *)kstat;
3723 posix_info->Ignored = 0;
3724 posix_info->CreationTime = cpu_to_le64(ksmbd_kstat->create_time);
3725 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->ctime);
3726 posix_info->ChangeTime = cpu_to_le64(time);
3727 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->atime);
3728 posix_info->LastAccessTime = cpu_to_le64(time);
3729 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->mtime);
3730 posix_info->LastWriteTime = cpu_to_le64(time);
3731 posix_info->EndOfFile = cpu_to_le64(ksmbd_kstat->kstat->size);
3732 posix_info->AllocationSize = cpu_to_le64(ksmbd_kstat->kstat->blocks << 9);
3733 posix_info->DeviceId = cpu_to_le32(ksmbd_kstat->kstat->rdev);
3734 posix_info->HardLinks = cpu_to_le32(ksmbd_kstat->kstat->nlink);
3735 posix_info->Mode = cpu_to_le32(ksmbd_kstat->kstat->mode & 0777);
3736 posix_info->Inode = cpu_to_le64(ksmbd_kstat->kstat->ino);
3737 posix_info->DosAttributes =
3738 S_ISDIR(ksmbd_kstat->kstat->mode) ?
3739 FILE_ATTRIBUTE_DIRECTORY_LE : FILE_ATTRIBUTE_ARCHIVE_LE;
3740 if (d_info->hide_dot_file && d_info->name[0] == '.')
3741 posix_info->DosAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3742 /*
3743 * SidBuffer(32) contain two sids(Domain sid(16), UNIX group sid(16)).
3744 * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) +
3745 * sub_auth(4 * 1(num_subauth)) + RID(4).
3746 */
3747 id_to_sid(from_kuid_munged(&init_user_ns, ksmbd_kstat->kstat->uid),
3748 SIDUNIX_USER, (struct smb_sid *)&posix_info->SidBuffer[0]);
3749 id_to_sid(from_kgid_munged(&init_user_ns, ksmbd_kstat->kstat->gid),
3750 SIDUNIX_GROUP, (struct smb_sid *)&posix_info->SidBuffer[16]);
3751 memcpy(posix_info->name, conv_name, conv_len);
3752 posix_info->name_len = cpu_to_le32(conv_len);
3753 posix_info->NextEntryOffset = cpu_to_le32(next_entry_offset);
3754 break;
3755 }
3756
3757 } /* switch (info_level) */
3758
3759 d_info->last_entry_offset = d_info->data_count;
3760 d_info->data_count += next_entry_offset;
3761 d_info->out_buf_len -= next_entry_offset;
3762 d_info->wptr += next_entry_offset;
3763
3764 ksmbd_debug(SMB,
3765 "info_level : %d, buf_len :%d, next_offset : %d, data_count : %d\n",
3766 info_level, d_info->out_buf_len,
3767 next_entry_offset, d_info->data_count);
3768
3769 free_conv_name:
3770 kfree(conv_name);
3771 return rc;
3772 }
3773
3774 struct smb2_query_dir_private {
3775 struct ksmbd_work *work;
3776 char *search_pattern;
3777 struct ksmbd_file *dir_fp;
3778
3779 struct ksmbd_dir_info *d_info;
3780 int info_level;
3781 };
3782
3783 static void lock_dir(struct ksmbd_file *dir_fp)
3784 {
3785 struct dentry *dir = dir_fp->filp->f_path.dentry;
3786
3787 inode_lock_nested(d_inode(dir), I_MUTEX_PARENT);
3788 }
3789
3790 static void unlock_dir(struct ksmbd_file *dir_fp)
3791 {
3792 struct dentry *dir = dir_fp->filp->f_path.dentry;
3793
3794 inode_unlock(d_inode(dir));
3795 }
3796
3797 static int process_query_dir_entries(struct smb2_query_dir_private *priv)
3798 {
3799 struct mnt_idmap *idmap = file_mnt_idmap(priv->dir_fp->filp);
3800 struct kstat kstat;
3801 struct ksmbd_kstat ksmbd_kstat;
3802 int rc;
3803 int i;
3804
3805 for (i = 0; i < priv->d_info->num_entry; i++) {
3806 struct dentry *dent;
3807
3808 if (dentry_name(priv->d_info, priv->info_level))
3809 return -EINVAL;
3810
3811 lock_dir(priv->dir_fp);
3812 dent = lookup_one(idmap, priv->d_info->name,
3813 priv->dir_fp->filp->f_path.dentry,
3814 priv->d_info->name_len);
3815 unlock_dir(priv->dir_fp);
3816
3817 if (IS_ERR(dent)) {
3818 ksmbd_debug(SMB, "Cannot lookup `%s' [%ld]\n",
3819 priv->d_info->name,
3820 PTR_ERR(dent));
3821 continue;
3822 }
3823 if (unlikely(d_is_negative(dent))) {
3824 dput(dent);
3825 ksmbd_debug(SMB, "Negative dentry `%s'\n",
3826 priv->d_info->name);
3827 continue;
3828 }
3829
3830 ksmbd_kstat.kstat = &kstat;
3831 if (priv->info_level != FILE_NAMES_INFORMATION)
3832 ksmbd_vfs_fill_dentry_attrs(priv->work,
3833 idmap,
3834 dent,
3835 &ksmbd_kstat);
3836
3837 rc = smb2_populate_readdir_entry(priv->work->conn,
3838 priv->info_level,
3839 priv->d_info,
3840 &ksmbd_kstat);
3841 dput(dent);
3842 if (rc)
3843 return rc;
3844 }
3845 return 0;
3846 }
3847
3848 static int reserve_populate_dentry(struct ksmbd_dir_info *d_info,
3849 int info_level)
3850 {
3851 int struct_sz;
3852 int conv_len;
3853 int next_entry_offset;
3854
3855 struct_sz = readdir_info_level_struct_sz(info_level);
3856 if (struct_sz == -EOPNOTSUPP)
3857 return -EOPNOTSUPP;
3858
3859 conv_len = (d_info->name_len + 1) * 2;
3860 next_entry_offset = ALIGN(struct_sz + conv_len,
3861 KSMBD_DIR_INFO_ALIGNMENT);
3862
3863 if (next_entry_offset > d_info->out_buf_len) {
3864 d_info->out_buf_len = 0;
3865 return -ENOSPC;
3866 }
3867
3868 switch (info_level) {
3869 case FILE_FULL_DIRECTORY_INFORMATION:
3870 {
3871 struct file_full_directory_info *ffdinfo;
3872
3873 ffdinfo = (struct file_full_directory_info *)d_info->wptr;
3874 memcpy(ffdinfo->FileName, d_info->name, d_info->name_len);
3875 ffdinfo->FileName[d_info->name_len] = 0x00;
3876 ffdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3877 ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3878 break;
3879 }
3880 case FILE_BOTH_DIRECTORY_INFORMATION:
3881 {
3882 struct file_both_directory_info *fbdinfo;
3883
3884 fbdinfo = (struct file_both_directory_info *)d_info->wptr;
3885 memcpy(fbdinfo->FileName, d_info->name, d_info->name_len);
3886 fbdinfo->FileName[d_info->name_len] = 0x00;
3887 fbdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3888 fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3889 break;
3890 }
3891 case FILE_DIRECTORY_INFORMATION:
3892 {
3893 struct file_directory_info *fdinfo;
3894
3895 fdinfo = (struct file_directory_info *)d_info->wptr;
3896 memcpy(fdinfo->FileName, d_info->name, d_info->name_len);
3897 fdinfo->FileName[d_info->name_len] = 0x00;
3898 fdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3899 fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3900 break;
3901 }
3902 case FILE_NAMES_INFORMATION:
3903 {
3904 struct file_names_info *fninfo;
3905
3906 fninfo = (struct file_names_info *)d_info->wptr;
3907 memcpy(fninfo->FileName, d_info->name, d_info->name_len);
3908 fninfo->FileName[d_info->name_len] = 0x00;
3909 fninfo->FileNameLength = cpu_to_le32(d_info->name_len);
3910 fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3911 break;
3912 }
3913 case FILEID_FULL_DIRECTORY_INFORMATION:
3914 {
3915 struct file_id_full_dir_info *dinfo;
3916
3917 dinfo = (struct file_id_full_dir_info *)d_info->wptr;
3918 memcpy(dinfo->FileName, d_info->name, d_info->name_len);
3919 dinfo->FileName[d_info->name_len] = 0x00;
3920 dinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3921 dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3922 break;
3923 }
3924 case FILEID_BOTH_DIRECTORY_INFORMATION:
3925 {
3926 struct file_id_both_directory_info *fibdinfo;
3927
3928 fibdinfo = (struct file_id_both_directory_info *)d_info->wptr;
3929 memcpy(fibdinfo->FileName, d_info->name, d_info->name_len);
3930 fibdinfo->FileName[d_info->name_len] = 0x00;
3931 fibdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3932 fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3933 break;
3934 }
3935 case SMB_FIND_FILE_POSIX_INFO:
3936 {
3937 struct smb2_posix_info *posix_info;
3938
3939 posix_info = (struct smb2_posix_info *)d_info->wptr;
3940 memcpy(posix_info->name, d_info->name, d_info->name_len);
3941 posix_info->name[d_info->name_len] = 0x00;
3942 posix_info->name_len = cpu_to_le32(d_info->name_len);
3943 posix_info->NextEntryOffset =
3944 cpu_to_le32(next_entry_offset);
3945 break;
3946 }
3947 } /* switch (info_level) */
3948
3949 d_info->num_entry++;
3950 d_info->out_buf_len -= next_entry_offset;
3951 d_info->wptr += next_entry_offset;
3952 return 0;
3953 }
3954
3955 static bool __query_dir(struct dir_context *ctx, const char *name, int namlen,
3956 loff_t offset, u64 ino, unsigned int d_type)
3957 {
3958 struct ksmbd_readdir_data *buf;
3959 struct smb2_query_dir_private *priv;
3960 struct ksmbd_dir_info *d_info;
3961 int rc;
3962
3963 buf = container_of(ctx, struct ksmbd_readdir_data, ctx);
3964 priv = buf->private;
3965 d_info = priv->d_info;
3966
3967 /* dot and dotdot entries are already reserved */
3968 if (!strcmp(".", name) || !strcmp("..", name))
3969 return true;
3970 if (ksmbd_share_veto_filename(priv->work->tcon->share_conf, name))
3971 return true;
3972 if (!match_pattern(name, namlen, priv->search_pattern))
3973 return true;
3974
3975 d_info->name = name;
3976 d_info->name_len = namlen;
3977 rc = reserve_populate_dentry(d_info, priv->info_level);
3978 if (rc)
3979 return false;
3980 if (d_info->flags & SMB2_RETURN_SINGLE_ENTRY)
3981 d_info->out_buf_len = 0;
3982 return true;
3983 }
3984
3985 static int verify_info_level(int info_level)
3986 {
3987 switch (info_level) {
3988 case FILE_FULL_DIRECTORY_INFORMATION:
3989 case FILE_BOTH_DIRECTORY_INFORMATION:
3990 case FILE_DIRECTORY_INFORMATION:
3991 case FILE_NAMES_INFORMATION:
3992 case FILEID_FULL_DIRECTORY_INFORMATION:
3993 case FILEID_BOTH_DIRECTORY_INFORMATION:
3994 case SMB_FIND_FILE_POSIX_INFO:
3995 break;
3996 default:
3997 return -EOPNOTSUPP;
3998 }
3999
4000 return 0;
4001 }
4002
4003 static int smb2_resp_buf_len(struct ksmbd_work *work, unsigned short hdr2_len)
4004 {
4005 int free_len;
4006
4007 free_len = (int)(work->response_sz -
4008 (get_rfc1002_len(work->response_buf) + 4)) - hdr2_len;
4009 return free_len;
4010 }
4011
4012 static int smb2_calc_max_out_buf_len(struct ksmbd_work *work,
4013 unsigned short hdr2_len,
4014 unsigned int out_buf_len)
4015 {
4016 int free_len;
4017
4018 if (out_buf_len > work->conn->vals->max_trans_size)
4019 return -EINVAL;
4020
4021 free_len = smb2_resp_buf_len(work, hdr2_len);
4022 if (free_len < 0)
4023 return -EINVAL;
4024
4025 return min_t(int, out_buf_len, free_len);
4026 }
4027
4028 int smb2_query_dir(struct ksmbd_work *work)
4029 {
4030 struct ksmbd_conn *conn = work->conn;
4031 struct smb2_query_directory_req *req;
4032 struct smb2_query_directory_rsp *rsp;
4033 struct ksmbd_share_config *share = work->tcon->share_conf;
4034 struct ksmbd_file *dir_fp = NULL;
4035 struct ksmbd_dir_info d_info;
4036 int rc = 0;
4037 char *srch_ptr = NULL;
4038 unsigned char srch_flag;
4039 int buffer_sz;
4040 struct smb2_query_dir_private query_dir_private = {NULL, };
4041
4042 WORK_BUFFERS(work, req, rsp);
4043
4044 if (ksmbd_override_fsids(work)) {
4045 rsp->hdr.Status = STATUS_NO_MEMORY;
4046 smb2_set_err_rsp(work);
4047 return -ENOMEM;
4048 }
4049
4050 rc = verify_info_level(req->FileInformationClass);
4051 if (rc) {
4052 rc = -EFAULT;
4053 goto err_out2;
4054 }
4055
4056 dir_fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
4057 if (!dir_fp) {
4058 rc = -EBADF;
4059 goto err_out2;
4060 }
4061
4062 if (!(dir_fp->daccess & FILE_LIST_DIRECTORY_LE) ||
4063 inode_permission(file_mnt_idmap(dir_fp->filp),
4064 file_inode(dir_fp->filp),
4065 MAY_READ | MAY_EXEC)) {
4066 pr_err("no right to enumerate directory (%pD)\n", dir_fp->filp);
4067 rc = -EACCES;
4068 goto err_out2;
4069 }
4070
4071 if (!S_ISDIR(file_inode(dir_fp->filp)->i_mode)) {
4072 pr_err("can't do query dir for a file\n");
4073 rc = -EINVAL;
4074 goto err_out2;
4075 }
4076
4077 srch_flag = req->Flags;
4078 srch_ptr = smb_strndup_from_utf16(req->Buffer,
4079 le16_to_cpu(req->FileNameLength), 1,
4080 conn->local_nls);
4081 if (IS_ERR(srch_ptr)) {
4082 ksmbd_debug(SMB, "Search Pattern not found\n");
4083 rc = -EINVAL;
4084 goto err_out2;
4085 } else {
4086 ksmbd_debug(SMB, "Search pattern is %s\n", srch_ptr);
4087 }
4088
4089 if (srch_flag & SMB2_REOPEN || srch_flag & SMB2_RESTART_SCANS) {
4090 ksmbd_debug(SMB, "Restart directory scan\n");
4091 generic_file_llseek(dir_fp->filp, 0, SEEK_SET);
4092 }
4093
4094 memset(&d_info, 0, sizeof(struct ksmbd_dir_info));
4095 d_info.wptr = (char *)rsp->Buffer;
4096 d_info.rptr = (char *)rsp->Buffer;
4097 d_info.out_buf_len =
4098 smb2_calc_max_out_buf_len(work, 8,
4099 le32_to_cpu(req->OutputBufferLength));
4100 if (d_info.out_buf_len < 0) {
4101 rc = -EINVAL;
4102 goto err_out;
4103 }
4104 d_info.flags = srch_flag;
4105
4106 /*
4107 * reserve dot and dotdot entries in head of buffer
4108 * in first response
4109 */
4110 rc = ksmbd_populate_dot_dotdot_entries(work, req->FileInformationClass,
4111 dir_fp, &d_info, srch_ptr,
4112 smb2_populate_readdir_entry);
4113 if (rc == -ENOSPC)
4114 rc = 0;
4115 else if (rc)
4116 goto err_out;
4117
4118 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_HIDE_DOT_FILES))
4119 d_info.hide_dot_file = true;
4120
4121 buffer_sz = d_info.out_buf_len;
4122 d_info.rptr = d_info.wptr;
4123 query_dir_private.work = work;
4124 query_dir_private.search_pattern = srch_ptr;
4125 query_dir_private.dir_fp = dir_fp;
4126 query_dir_private.d_info = &d_info;
4127 query_dir_private.info_level = req->FileInformationClass;
4128 dir_fp->readdir_data.private = &query_dir_private;
4129 set_ctx_actor(&dir_fp->readdir_data.ctx, __query_dir);
4130
4131 rc = iterate_dir(dir_fp->filp, &dir_fp->readdir_data.ctx);
4132 /*
4133 * req->OutputBufferLength is too small to contain even one entry.
4134 * In this case, it immediately returns OutputBufferLength 0 to client.
4135 */
4136 if (!d_info.out_buf_len && !d_info.num_entry)
4137 goto no_buf_len;
4138 if (rc > 0 || rc == -ENOSPC)
4139 rc = 0;
4140 else if (rc)
4141 goto err_out;
4142
4143 d_info.wptr = d_info.rptr;
4144 d_info.out_buf_len = buffer_sz;
4145 rc = process_query_dir_entries(&query_dir_private);
4146 if (rc)
4147 goto err_out;
4148
4149 if (!d_info.data_count && d_info.out_buf_len >= 0) {
4150 if (srch_flag & SMB2_RETURN_SINGLE_ENTRY && !is_asterisk(srch_ptr)) {
4151 rsp->hdr.Status = STATUS_NO_SUCH_FILE;
4152 } else {
4153 dir_fp->dot_dotdot[0] = dir_fp->dot_dotdot[1] = 0;
4154 rsp->hdr.Status = STATUS_NO_MORE_FILES;
4155 }
4156 rsp->StructureSize = cpu_to_le16(9);
4157 rsp->OutputBufferOffset = cpu_to_le16(0);
4158 rsp->OutputBufferLength = cpu_to_le32(0);
4159 rsp->Buffer[0] = 0;
4160 rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
4161 sizeof(struct smb2_query_directory_rsp));
4162 if (rc)
4163 goto err_out;
4164 } else {
4165 no_buf_len:
4166 ((struct file_directory_info *)
4167 ((char *)rsp->Buffer + d_info.last_entry_offset))
4168 ->NextEntryOffset = 0;
4169 if (d_info.data_count >= d_info.last_entry_off_align)
4170 d_info.data_count -= d_info.last_entry_off_align;
4171
4172 rsp->StructureSize = cpu_to_le16(9);
4173 rsp->OutputBufferOffset = cpu_to_le16(72);
4174 rsp->OutputBufferLength = cpu_to_le32(d_info.data_count);
4175 rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
4176 offsetof(struct smb2_query_directory_rsp, Buffer) +
4177 d_info.data_count);
4178 if (rc)
4179 goto err_out;
4180 }
4181
4182 kfree(srch_ptr);
4183 ksmbd_fd_put(work, dir_fp);
4184 ksmbd_revert_fsids(work);
4185 return 0;
4186
4187 err_out:
4188 pr_err("error while processing smb2 query dir rc = %d\n", rc);
4189 kfree(srch_ptr);
4190
4191 err_out2:
4192 if (rc == -EINVAL)
4193 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
4194 else if (rc == -EACCES)
4195 rsp->hdr.Status = STATUS_ACCESS_DENIED;
4196 else if (rc == -ENOENT)
4197 rsp->hdr.Status = STATUS_NO_SUCH_FILE;
4198 else if (rc == -EBADF)
4199 rsp->hdr.Status = STATUS_FILE_CLOSED;
4200 else if (rc == -ENOMEM)
4201 rsp->hdr.Status = STATUS_NO_MEMORY;
4202 else if (rc == -EFAULT)
4203 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
4204 else if (rc == -EIO)
4205 rsp->hdr.Status = STATUS_FILE_CORRUPT_ERROR;
4206 if (!rsp->hdr.Status)
4207 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
4208
4209 smb2_set_err_rsp(work);
4210 ksmbd_fd_put(work, dir_fp);
4211 ksmbd_revert_fsids(work);
4212 return 0;
4213 }
4214
4215 /**
4216 * buffer_check_err() - helper function to check buffer errors
4217 * @reqOutputBufferLength: max buffer length expected in command response
4218 * @rsp: query info response buffer contains output buffer length
4219 * @rsp_org: base response buffer pointer in case of chained response
4220 *
4221 * Return: 0 on success, otherwise error
4222 */
4223 static int buffer_check_err(int reqOutputBufferLength,
4224 struct smb2_query_info_rsp *rsp,
4225 void *rsp_org)
4226 {
4227 if (reqOutputBufferLength < le32_to_cpu(rsp->OutputBufferLength)) {
4228 pr_err("Invalid Buffer Size Requested\n");
4229 rsp->hdr.Status = STATUS_INFO_LENGTH_MISMATCH;
4230 *(__be32 *)rsp_org = cpu_to_be32(sizeof(struct smb2_hdr));
4231 return -EINVAL;
4232 }
4233 return 0;
4234 }
4235
4236 static void get_standard_info_pipe(struct smb2_query_info_rsp *rsp,
4237 void *rsp_org)
4238 {
4239 struct smb2_file_standard_info *sinfo;
4240
4241 sinfo = (struct smb2_file_standard_info *)rsp->Buffer;
4242
4243 sinfo->AllocationSize = cpu_to_le64(4096);
4244 sinfo->EndOfFile = cpu_to_le64(0);
4245 sinfo->NumberOfLinks = cpu_to_le32(1);
4246 sinfo->DeletePending = 1;
4247 sinfo->Directory = 0;
4248 rsp->OutputBufferLength =
4249 cpu_to_le32(sizeof(struct smb2_file_standard_info));
4250 }
4251
4252 static void get_internal_info_pipe(struct smb2_query_info_rsp *rsp, u64 num,
4253 void *rsp_org)
4254 {
4255 struct smb2_file_internal_info *file_info;
4256
4257 file_info = (struct smb2_file_internal_info *)rsp->Buffer;
4258
4259 /* any unique number */
4260 file_info->IndexNumber = cpu_to_le64(num | (1ULL << 63));
4261 rsp->OutputBufferLength =
4262 cpu_to_le32(sizeof(struct smb2_file_internal_info));
4263 }
4264
4265 static int smb2_get_info_file_pipe(struct ksmbd_session *sess,
4266 struct smb2_query_info_req *req,
4267 struct smb2_query_info_rsp *rsp,
4268 void *rsp_org)
4269 {
4270 u64 id;
4271 int rc;
4272
4273 /*
4274 * Windows can sometime send query file info request on
4275 * pipe without opening it, checking error condition here
4276 */
4277 id = req->VolatileFileId;
4278 if (!ksmbd_session_rpc_method(sess, id))
4279 return -ENOENT;
4280
4281 ksmbd_debug(SMB, "FileInfoClass %u, FileId 0x%llx\n",
4282 req->FileInfoClass, req->VolatileFileId);
4283
4284 switch (req->FileInfoClass) {
4285 case FILE_STANDARD_INFORMATION:
4286 get_standard_info_pipe(rsp, rsp_org);
4287 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4288 rsp, rsp_org);
4289 break;
4290 case FILE_INTERNAL_INFORMATION:
4291 get_internal_info_pipe(rsp, id, rsp_org);
4292 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4293 rsp, rsp_org);
4294 break;
4295 default:
4296 ksmbd_debug(SMB, "smb2_info_file_pipe for %u not supported\n",
4297 req->FileInfoClass);
4298 rc = -EOPNOTSUPP;
4299 }
4300 return rc;
4301 }
4302
4303 /**
4304 * smb2_get_ea() - handler for smb2 get extended attribute command
4305 * @work: smb work containing query info command buffer
4306 * @fp: ksmbd_file pointer
4307 * @req: get extended attribute request
4308 * @rsp: response buffer pointer
4309 * @rsp_org: base response buffer pointer in case of chained response
4310 *
4311 * Return: 0 on success, otherwise error
4312 */
4313 static int smb2_get_ea(struct ksmbd_work *work, struct ksmbd_file *fp,
4314 struct smb2_query_info_req *req,
4315 struct smb2_query_info_rsp *rsp, void *rsp_org)
4316 {
4317 struct smb2_ea_info *eainfo, *prev_eainfo;
4318 char *name, *ptr, *xattr_list = NULL, *buf;
4319 int rc, name_len, value_len, xattr_list_len, idx;
4320 ssize_t buf_free_len, alignment_bytes, next_offset, rsp_data_cnt = 0;
4321 struct smb2_ea_info_req *ea_req = NULL;
4322 const struct path *path;
4323 struct mnt_idmap *idmap = file_mnt_idmap(fp->filp);
4324
4325 if (!(fp->daccess & FILE_READ_EA_LE)) {
4326 pr_err("Not permitted to read ext attr : 0x%x\n",
4327 fp->daccess);
4328 return -EACCES;
4329 }
4330
4331 path = &fp->filp->f_path;
4332 /* single EA entry is requested with given user.* name */
4333 if (req->InputBufferLength) {
4334 if (le32_to_cpu(req->InputBufferLength) <
4335 sizeof(struct smb2_ea_info_req))
4336 return -EINVAL;
4337
4338 ea_req = (struct smb2_ea_info_req *)req->Buffer;
4339 } else {
4340 /* need to send all EAs, if no specific EA is requested*/
4341 if (le32_to_cpu(req->Flags) & SL_RETURN_SINGLE_ENTRY)
4342 ksmbd_debug(SMB,
4343 "All EAs are requested but need to send single EA entry in rsp flags 0x%x\n",
4344 le32_to_cpu(req->Flags));
4345 }
4346
4347 buf_free_len =
4348 smb2_calc_max_out_buf_len(work, 8,
4349 le32_to_cpu(req->OutputBufferLength));
4350 if (buf_free_len < 0)
4351 return -EINVAL;
4352
4353 rc = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
4354 if (rc < 0) {
4355 rsp->hdr.Status = STATUS_INVALID_HANDLE;
4356 goto out;
4357 } else if (!rc) { /* there is no EA in the file */
4358 ksmbd_debug(SMB, "no ea data in the file\n");
4359 goto done;
4360 }
4361 xattr_list_len = rc;
4362
4363 ptr = (char *)rsp->Buffer;
4364 eainfo = (struct smb2_ea_info *)ptr;
4365 prev_eainfo = eainfo;
4366 idx = 0;
4367
4368 while (idx < xattr_list_len) {
4369 name = xattr_list + idx;
4370 name_len = strlen(name);
4371
4372 ksmbd_debug(SMB, "%s, len %d\n", name, name_len);
4373 idx += name_len + 1;
4374
4375 /*
4376 * CIFS does not support EA other than user.* namespace,
4377 * still keep the framework generic, to list other attrs
4378 * in future.
4379 */
4380 if (strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4381 continue;
4382
4383 if (!strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX,
4384 STREAM_PREFIX_LEN))
4385 continue;
4386
4387 if (req->InputBufferLength &&
4388 strncmp(&name[XATTR_USER_PREFIX_LEN], ea_req->name,
4389 ea_req->EaNameLength))
4390 continue;
4391
4392 if (!strncmp(&name[XATTR_USER_PREFIX_LEN],
4393 DOS_ATTRIBUTE_PREFIX, DOS_ATTRIBUTE_PREFIX_LEN))
4394 continue;
4395
4396 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4397 name_len -= XATTR_USER_PREFIX_LEN;
4398
4399 ptr = eainfo->name + name_len + 1;
4400 buf_free_len -= (offsetof(struct smb2_ea_info, name) +
4401 name_len + 1);
4402 /* bailout if xattr can't fit in buf_free_len */
4403 value_len = ksmbd_vfs_getxattr(idmap, path->dentry,
4404 name, &buf);
4405 if (value_len <= 0) {
4406 rc = -ENOENT;
4407 rsp->hdr.Status = STATUS_INVALID_HANDLE;
4408 goto out;
4409 }
4410
4411 buf_free_len -= value_len;
4412 if (buf_free_len < 0) {
4413 kfree(buf);
4414 break;
4415 }
4416
4417 memcpy(ptr, buf, value_len);
4418 kfree(buf);
4419
4420 ptr += value_len;
4421 eainfo->Flags = 0;
4422 eainfo->EaNameLength = name_len;
4423
4424 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4425 memcpy(eainfo->name, &name[XATTR_USER_PREFIX_LEN],
4426 name_len);
4427 else
4428 memcpy(eainfo->name, name, name_len);
4429
4430 eainfo->name[name_len] = '\0';
4431 eainfo->EaValueLength = cpu_to_le16(value_len);
4432 next_offset = offsetof(struct smb2_ea_info, name) +
4433 name_len + 1 + value_len;
4434
4435 /* align next xattr entry at 4 byte bundary */
4436 alignment_bytes = ((next_offset + 3) & ~3) - next_offset;
4437 if (alignment_bytes) {
4438 memset(ptr, '\0', alignment_bytes);
4439 ptr += alignment_bytes;
4440 next_offset += alignment_bytes;
4441 buf_free_len -= alignment_bytes;
4442 }
4443 eainfo->NextEntryOffset = cpu_to_le32(next_offset);
4444 prev_eainfo = eainfo;
4445 eainfo = (struct smb2_ea_info *)ptr;
4446 rsp_data_cnt += next_offset;
4447
4448 if (req->InputBufferLength) {
4449 ksmbd_debug(SMB, "single entry requested\n");
4450 break;
4451 }
4452 }
4453
4454 /* no more ea entries */
4455 prev_eainfo->NextEntryOffset = 0;
4456 done:
4457 rc = 0;
4458 if (rsp_data_cnt == 0)
4459 rsp->hdr.Status = STATUS_NO_EAS_ON_FILE;
4460 rsp->OutputBufferLength = cpu_to_le32(rsp_data_cnt);
4461 out:
4462 kvfree(xattr_list);
4463 return rc;
4464 }
4465
4466 static void get_file_access_info(struct smb2_query_info_rsp *rsp,
4467 struct ksmbd_file *fp, void *rsp_org)
4468 {
4469 struct smb2_file_access_info *file_info;
4470
4471 file_info = (struct smb2_file_access_info *)rsp->Buffer;
4472 file_info->AccessFlags = fp->daccess;
4473 rsp->OutputBufferLength =
4474 cpu_to_le32(sizeof(struct smb2_file_access_info));
4475 }
4476
4477 static int get_file_basic_info(struct smb2_query_info_rsp *rsp,
4478 struct ksmbd_file *fp, void *rsp_org)
4479 {
4480 struct smb2_file_basic_info *basic_info;
4481 struct kstat stat;
4482 u64 time;
4483
4484 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4485 pr_err("no right to read the attributes : 0x%x\n",
4486 fp->daccess);
4487 return -EACCES;
4488 }
4489
4490 basic_info = (struct smb2_file_basic_info *)rsp->Buffer;
4491 generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS,
4492 file_inode(fp->filp), &stat);
4493 basic_info->CreationTime = cpu_to_le64(fp->create_time);
4494 time = ksmbd_UnixTimeToNT(stat.atime);
4495 basic_info->LastAccessTime = cpu_to_le64(time);
4496 time = ksmbd_UnixTimeToNT(stat.mtime);
4497 basic_info->LastWriteTime = cpu_to_le64(time);
4498 time = ksmbd_UnixTimeToNT(stat.ctime);
4499 basic_info->ChangeTime = cpu_to_le64(time);
4500 basic_info->Attributes = fp->f_ci->m_fattr;
4501 basic_info->Pad1 = 0;
4502 rsp->OutputBufferLength =
4503 cpu_to_le32(sizeof(struct smb2_file_basic_info));
4504 return 0;
4505 }
4506
4507 static void get_file_standard_info(struct smb2_query_info_rsp *rsp,
4508 struct ksmbd_file *fp, void *rsp_org)
4509 {
4510 struct smb2_file_standard_info *sinfo;
4511 unsigned int delete_pending;
4512 struct inode *inode;
4513 struct kstat stat;
4514
4515 inode = file_inode(fp->filp);
4516 generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS, inode, &stat);
4517
4518 sinfo = (struct smb2_file_standard_info *)rsp->Buffer;
4519 delete_pending = ksmbd_inode_pending_delete(fp);
4520
4521 sinfo->AllocationSize = cpu_to_le64(inode->i_blocks << 9);
4522 sinfo->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4523 sinfo->NumberOfLinks = cpu_to_le32(get_nlink(&stat) - delete_pending);
4524 sinfo->DeletePending = delete_pending;
4525 sinfo->Directory = S_ISDIR(stat.mode) ? 1 : 0;
4526 rsp->OutputBufferLength =
4527 cpu_to_le32(sizeof(struct smb2_file_standard_info));
4528 }
4529
4530 static void get_file_alignment_info(struct smb2_query_info_rsp *rsp,
4531 void *rsp_org)
4532 {
4533 struct smb2_file_alignment_info *file_info;
4534
4535 file_info = (struct smb2_file_alignment_info *)rsp->Buffer;
4536 file_info->AlignmentRequirement = 0;
4537 rsp->OutputBufferLength =
4538 cpu_to_le32(sizeof(struct smb2_file_alignment_info));
4539 }
4540
4541 static int get_file_all_info(struct ksmbd_work *work,
4542 struct smb2_query_info_rsp *rsp,
4543 struct ksmbd_file *fp,
4544 void *rsp_org)
4545 {
4546 struct ksmbd_conn *conn = work->conn;
4547 struct smb2_file_all_info *file_info;
4548 unsigned int delete_pending;
4549 struct inode *inode;
4550 struct kstat stat;
4551 int conv_len;
4552 char *filename;
4553 u64 time;
4554
4555 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4556 ksmbd_debug(SMB, "no right to read the attributes : 0x%x\n",
4557 fp->daccess);
4558 return -EACCES;
4559 }
4560
4561 filename = convert_to_nt_pathname(work->tcon->share_conf, &fp->filp->f_path);
4562 if (IS_ERR(filename))
4563 return PTR_ERR(filename);
4564
4565 inode = file_inode(fp->filp);
4566 generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS, inode, &stat);
4567
4568 ksmbd_debug(SMB, "filename = %s\n", filename);
4569 delete_pending = ksmbd_inode_pending_delete(fp);
4570 file_info = (struct smb2_file_all_info *)rsp->Buffer;
4571
4572 file_info->CreationTime = cpu_to_le64(fp->create_time);
4573 time = ksmbd_UnixTimeToNT(stat.atime);
4574 file_info->LastAccessTime = cpu_to_le64(time);
4575 time = ksmbd_UnixTimeToNT(stat.mtime);
4576 file_info->LastWriteTime = cpu_to_le64(time);
4577 time = ksmbd_UnixTimeToNT(stat.ctime);
4578 file_info->ChangeTime = cpu_to_le64(time);
4579 file_info->Attributes = fp->f_ci->m_fattr;
4580 file_info->Pad1 = 0;
4581 file_info->AllocationSize =
4582 cpu_to_le64(inode->i_blocks << 9);
4583 file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4584 file_info->NumberOfLinks =
4585 cpu_to_le32(get_nlink(&stat) - delete_pending);
4586 file_info->DeletePending = delete_pending;
4587 file_info->Directory = S_ISDIR(stat.mode) ? 1 : 0;
4588 file_info->Pad2 = 0;
4589 file_info->IndexNumber = cpu_to_le64(stat.ino);
4590 file_info->EASize = 0;
4591 file_info->AccessFlags = fp->daccess;
4592 file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos);
4593 file_info->Mode = fp->coption;
4594 file_info->AlignmentRequirement = 0;
4595 conv_len = smbConvertToUTF16((__le16 *)file_info->FileName, filename,
4596 PATH_MAX, conn->local_nls, 0);
4597 conv_len *= 2;
4598 file_info->FileNameLength = cpu_to_le32(conv_len);
4599 rsp->OutputBufferLength =
4600 cpu_to_le32(sizeof(struct smb2_file_all_info) + conv_len - 1);
4601 kfree(filename);
4602 return 0;
4603 }
4604
4605 static void get_file_alternate_info(struct ksmbd_work *work,
4606 struct smb2_query_info_rsp *rsp,
4607 struct ksmbd_file *fp,
4608 void *rsp_org)
4609 {
4610 struct ksmbd_conn *conn = work->conn;
4611 struct smb2_file_alt_name_info *file_info;
4612 struct dentry *dentry = fp->filp->f_path.dentry;
4613 int conv_len;
4614
4615 spin_lock(&dentry->d_lock);
4616 file_info = (struct smb2_file_alt_name_info *)rsp->Buffer;
4617 conv_len = ksmbd_extract_shortname(conn,
4618 dentry->d_name.name,
4619 file_info->FileName);
4620 spin_unlock(&dentry->d_lock);
4621 file_info->FileNameLength = cpu_to_le32(conv_len);
4622 rsp->OutputBufferLength =
4623 cpu_to_le32(sizeof(struct smb2_file_alt_name_info) + conv_len);
4624 }
4625
4626 static void get_file_stream_info(struct ksmbd_work *work,
4627 struct smb2_query_info_rsp *rsp,
4628 struct ksmbd_file *fp,
4629 void *rsp_org)
4630 {
4631 struct ksmbd_conn *conn = work->conn;
4632 struct smb2_file_stream_info *file_info;
4633 char *stream_name, *xattr_list = NULL, *stream_buf;
4634 struct kstat stat;
4635 const struct path *path = &fp->filp->f_path;
4636 ssize_t xattr_list_len;
4637 int nbytes = 0, streamlen, stream_name_len, next, idx = 0;
4638 int buf_free_len;
4639 struct smb2_query_info_req *req = ksmbd_req_buf_next(work);
4640
4641 generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS,
4642 file_inode(fp->filp), &stat);
4643 file_info = (struct smb2_file_stream_info *)rsp->Buffer;
4644
4645 buf_free_len =
4646 smb2_calc_max_out_buf_len(work, 8,
4647 le32_to_cpu(req->OutputBufferLength));
4648 if (buf_free_len < 0)
4649 goto out;
4650
4651 xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
4652 if (xattr_list_len < 0) {
4653 goto out;
4654 } else if (!xattr_list_len) {
4655 ksmbd_debug(SMB, "empty xattr in the file\n");
4656 goto out;
4657 }
4658
4659 while (idx < xattr_list_len) {
4660 stream_name = xattr_list + idx;
4661 streamlen = strlen(stream_name);
4662 idx += streamlen + 1;
4663
4664 ksmbd_debug(SMB, "%s, len %d\n", stream_name, streamlen);
4665
4666 if (strncmp(&stream_name[XATTR_USER_PREFIX_LEN],
4667 STREAM_PREFIX, STREAM_PREFIX_LEN))
4668 continue;
4669
4670 stream_name_len = streamlen - (XATTR_USER_PREFIX_LEN +
4671 STREAM_PREFIX_LEN);
4672 streamlen = stream_name_len;
4673
4674 /* plus : size */
4675 streamlen += 1;
4676 stream_buf = kmalloc(streamlen + 1, GFP_KERNEL);
4677 if (!stream_buf)
4678 break;
4679
4680 streamlen = snprintf(stream_buf, streamlen + 1,
4681 ":%s", &stream_name[XATTR_NAME_STREAM_LEN]);
4682
4683 next = sizeof(struct smb2_file_stream_info) + streamlen * 2;
4684 if (next > buf_free_len) {
4685 kfree(stream_buf);
4686 break;
4687 }
4688
4689 file_info = (struct smb2_file_stream_info *)&rsp->Buffer[nbytes];
4690 streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName,
4691 stream_buf, streamlen,
4692 conn->local_nls, 0);
4693 streamlen *= 2;
4694 kfree(stream_buf);
4695 file_info->StreamNameLength = cpu_to_le32(streamlen);
4696 file_info->StreamSize = cpu_to_le64(stream_name_len);
4697 file_info->StreamAllocationSize = cpu_to_le64(stream_name_len);
4698
4699 nbytes += next;
4700 buf_free_len -= next;
4701 file_info->NextEntryOffset = cpu_to_le32(next);
4702 }
4703
4704 out:
4705 if (!S_ISDIR(stat.mode) &&
4706 buf_free_len >= sizeof(struct smb2_file_stream_info) + 7 * 2) {
4707 file_info = (struct smb2_file_stream_info *)
4708 &rsp->Buffer[nbytes];
4709 streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName,
4710 "::$DATA", 7, conn->local_nls, 0);
4711 streamlen *= 2;
4712 file_info->StreamNameLength = cpu_to_le32(streamlen);
4713 file_info->StreamSize = cpu_to_le64(stat.size);
4714 file_info->StreamAllocationSize = cpu_to_le64(stat.blocks << 9);
4715 nbytes += sizeof(struct smb2_file_stream_info) + streamlen;
4716 }
4717
4718 /* last entry offset should be 0 */
4719 file_info->NextEntryOffset = 0;
4720 kvfree(xattr_list);
4721
4722 rsp->OutputBufferLength = cpu_to_le32(nbytes);
4723 }
4724
4725 static void get_file_internal_info(struct smb2_query_info_rsp *rsp,
4726 struct ksmbd_file *fp, void *rsp_org)
4727 {
4728 struct smb2_file_internal_info *file_info;
4729 struct kstat stat;
4730
4731 generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS,
4732 file_inode(fp->filp), &stat);
4733 file_info = (struct smb2_file_internal_info *)rsp->Buffer;
4734 file_info->IndexNumber = cpu_to_le64(stat.ino);
4735 rsp->OutputBufferLength =
4736 cpu_to_le32(sizeof(struct smb2_file_internal_info));
4737 }
4738
4739 static int get_file_network_open_info(struct smb2_query_info_rsp *rsp,
4740 struct ksmbd_file *fp, void *rsp_org)
4741 {
4742 struct smb2_file_ntwrk_info *file_info;
4743 struct inode *inode;
4744 struct kstat stat;
4745 u64 time;
4746
4747 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4748 pr_err("no right to read the attributes : 0x%x\n",
4749 fp->daccess);
4750 return -EACCES;
4751 }
4752
4753 file_info = (struct smb2_file_ntwrk_info *)rsp->Buffer;
4754
4755 inode = file_inode(fp->filp);
4756 generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS, inode, &stat);
4757
4758 file_info->CreationTime = cpu_to_le64(fp->create_time);
4759 time = ksmbd_UnixTimeToNT(stat.atime);
4760 file_info->LastAccessTime = cpu_to_le64(time);
4761 time = ksmbd_UnixTimeToNT(stat.mtime);
4762 file_info->LastWriteTime = cpu_to_le64(time);
4763 time = ksmbd_UnixTimeToNT(stat.ctime);
4764 file_info->ChangeTime = cpu_to_le64(time);
4765 file_info->Attributes = fp->f_ci->m_fattr;
4766 file_info->AllocationSize =
4767 cpu_to_le64(inode->i_blocks << 9);
4768 file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4769 file_info->Reserved = cpu_to_le32(0);
4770 rsp->OutputBufferLength =
4771 cpu_to_le32(sizeof(struct smb2_file_ntwrk_info));
4772 return 0;
4773 }
4774
4775 static void get_file_ea_info(struct smb2_query_info_rsp *rsp, void *rsp_org)
4776 {
4777 struct smb2_file_ea_info *file_info;
4778
4779 file_info = (struct smb2_file_ea_info *)rsp->Buffer;
4780 file_info->EASize = 0;
4781 rsp->OutputBufferLength =
4782 cpu_to_le32(sizeof(struct smb2_file_ea_info));
4783 }
4784
4785 static void get_file_position_info(struct smb2_query_info_rsp *rsp,
4786 struct ksmbd_file *fp, void *rsp_org)
4787 {
4788 struct smb2_file_pos_info *file_info;
4789
4790 file_info = (struct smb2_file_pos_info *)rsp->Buffer;
4791 file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos);
4792 rsp->OutputBufferLength =
4793 cpu_to_le32(sizeof(struct smb2_file_pos_info));
4794 }
4795
4796 static void get_file_mode_info(struct smb2_query_info_rsp *rsp,
4797 struct ksmbd_file *fp, void *rsp_org)
4798 {
4799 struct smb2_file_mode_info *file_info;
4800
4801 file_info = (struct smb2_file_mode_info *)rsp->Buffer;
4802 file_info->Mode = fp->coption & FILE_MODE_INFO_MASK;
4803 rsp->OutputBufferLength =
4804 cpu_to_le32(sizeof(struct smb2_file_mode_info));
4805 }
4806
4807 static void get_file_compression_info(struct smb2_query_info_rsp *rsp,
4808 struct ksmbd_file *fp, void *rsp_org)
4809 {
4810 struct smb2_file_comp_info *file_info;
4811 struct kstat stat;
4812
4813 generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS,
4814 file_inode(fp->filp), &stat);
4815
4816 file_info = (struct smb2_file_comp_info *)rsp->Buffer;
4817 file_info->CompressedFileSize = cpu_to_le64(stat.blocks << 9);
4818 file_info->CompressionFormat = COMPRESSION_FORMAT_NONE;
4819 file_info->CompressionUnitShift = 0;
4820 file_info->ChunkShift = 0;
4821 file_info->ClusterShift = 0;
4822 memset(&file_info->Reserved[0], 0, 3);
4823
4824 rsp->OutputBufferLength =
4825 cpu_to_le32(sizeof(struct smb2_file_comp_info));
4826 }
4827
4828 static int get_file_attribute_tag_info(struct smb2_query_info_rsp *rsp,
4829 struct ksmbd_file *fp, void *rsp_org)
4830 {
4831 struct smb2_file_attr_tag_info *file_info;
4832
4833 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4834 pr_err("no right to read the attributes : 0x%x\n",
4835 fp->daccess);
4836 return -EACCES;
4837 }
4838
4839 file_info = (struct smb2_file_attr_tag_info *)rsp->Buffer;
4840 file_info->FileAttributes = fp->f_ci->m_fattr;
4841 file_info->ReparseTag = 0;
4842 rsp->OutputBufferLength =
4843 cpu_to_le32(sizeof(struct smb2_file_attr_tag_info));
4844 return 0;
4845 }
4846
4847 static void find_file_posix_info(struct smb2_query_info_rsp *rsp,
4848 struct ksmbd_file *fp, void *rsp_org)
4849 {
4850 struct smb311_posix_qinfo *file_info;
4851 struct inode *inode = file_inode(fp->filp);
4852 struct mnt_idmap *idmap = file_mnt_idmap(fp->filp);
4853 vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode);
4854 vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode);
4855 u64 time;
4856 int out_buf_len = sizeof(struct smb311_posix_qinfo) + 32;
4857
4858 file_info = (struct smb311_posix_qinfo *)rsp->Buffer;
4859 file_info->CreationTime = cpu_to_le64(fp->create_time);
4860 time = ksmbd_UnixTimeToNT(inode_get_atime(inode));
4861 file_info->LastAccessTime = cpu_to_le64(time);
4862 time = ksmbd_UnixTimeToNT(inode_get_mtime(inode));
4863 file_info->LastWriteTime = cpu_to_le64(time);
4864 time = ksmbd_UnixTimeToNT(inode_get_ctime(inode));
4865 file_info->ChangeTime = cpu_to_le64(time);
4866 file_info->DosAttributes = fp->f_ci->m_fattr;
4867 file_info->Inode = cpu_to_le64(inode->i_ino);
4868 file_info->EndOfFile = cpu_to_le64(inode->i_size);
4869 file_info->AllocationSize = cpu_to_le64(inode->i_blocks << 9);
4870 file_info->HardLinks = cpu_to_le32(inode->i_nlink);
4871 file_info->Mode = cpu_to_le32(inode->i_mode & 0777);
4872 file_info->DeviceId = cpu_to_le32(inode->i_rdev);
4873
4874 /*
4875 * Sids(32) contain two sids(Domain sid(16), UNIX group sid(16)).
4876 * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) +
4877 * sub_auth(4 * 1(num_subauth)) + RID(4).
4878 */
4879 id_to_sid(from_kuid_munged(&init_user_ns, vfsuid_into_kuid(vfsuid)),
4880 SIDUNIX_USER, (struct smb_sid *)&file_info->Sids[0]);
4881 id_to_sid(from_kgid_munged(&init_user_ns, vfsgid_into_kgid(vfsgid)),
4882 SIDUNIX_GROUP, (struct smb_sid *)&file_info->Sids[16]);
4883
4884 rsp->OutputBufferLength = cpu_to_le32(out_buf_len);
4885 }
4886
4887 static int smb2_get_info_file(struct ksmbd_work *work,
4888 struct smb2_query_info_req *req,
4889 struct smb2_query_info_rsp *rsp)
4890 {
4891 struct ksmbd_file *fp;
4892 int fileinfoclass = 0;
4893 int rc = 0;
4894 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
4895
4896 if (test_share_config_flag(work->tcon->share_conf,
4897 KSMBD_SHARE_FLAG_PIPE)) {
4898 /* smb2 info file called for pipe */
4899 return smb2_get_info_file_pipe(work->sess, req, rsp,
4900 work->response_buf);
4901 }
4902
4903 if (work->next_smb2_rcv_hdr_off) {
4904 if (!has_file_id(req->VolatileFileId)) {
4905 ksmbd_debug(SMB, "Compound request set FID = %llu\n",
4906 work->compound_fid);
4907 id = work->compound_fid;
4908 pid = work->compound_pfid;
4909 }
4910 }
4911
4912 if (!has_file_id(id)) {
4913 id = req->VolatileFileId;
4914 pid = req->PersistentFileId;
4915 }
4916
4917 fp = ksmbd_lookup_fd_slow(work, id, pid);
4918 if (!fp)
4919 return -ENOENT;
4920
4921 fileinfoclass = req->FileInfoClass;
4922
4923 switch (fileinfoclass) {
4924 case FILE_ACCESS_INFORMATION:
4925 get_file_access_info(rsp, fp, work->response_buf);
4926 break;
4927
4928 case FILE_BASIC_INFORMATION:
4929 rc = get_file_basic_info(rsp, fp, work->response_buf);
4930 break;
4931
4932 case FILE_STANDARD_INFORMATION:
4933 get_file_standard_info(rsp, fp, work->response_buf);
4934 break;
4935
4936 case FILE_ALIGNMENT_INFORMATION:
4937 get_file_alignment_info(rsp, work->response_buf);
4938 break;
4939
4940 case FILE_ALL_INFORMATION:
4941 rc = get_file_all_info(work, rsp, fp, work->response_buf);
4942 break;
4943
4944 case FILE_ALTERNATE_NAME_INFORMATION:
4945 get_file_alternate_info(work, rsp, fp, work->response_buf);
4946 break;
4947
4948 case FILE_STREAM_INFORMATION:
4949 get_file_stream_info(work, rsp, fp, work->response_buf);
4950 break;
4951
4952 case FILE_INTERNAL_INFORMATION:
4953 get_file_internal_info(rsp, fp, work->response_buf);
4954 break;
4955
4956 case FILE_NETWORK_OPEN_INFORMATION:
4957 rc = get_file_network_open_info(rsp, fp, work->response_buf);
4958 break;
4959
4960 case FILE_EA_INFORMATION:
4961 get_file_ea_info(rsp, work->response_buf);
4962 break;
4963
4964 case FILE_FULL_EA_INFORMATION:
4965 rc = smb2_get_ea(work, fp, req, rsp, work->response_buf);
4966 break;
4967
4968 case FILE_POSITION_INFORMATION:
4969 get_file_position_info(rsp, fp, work->response_buf);
4970 break;
4971
4972 case FILE_MODE_INFORMATION:
4973 get_file_mode_info(rsp, fp, work->response_buf);
4974 break;
4975
4976 case FILE_COMPRESSION_INFORMATION:
4977 get_file_compression_info(rsp, fp, work->response_buf);
4978 break;
4979
4980 case FILE_ATTRIBUTE_TAG_INFORMATION:
4981 rc = get_file_attribute_tag_info(rsp, fp, work->response_buf);
4982 break;
4983 case SMB_FIND_FILE_POSIX_INFO:
4984 if (!work->tcon->posix_extensions) {
4985 pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n");
4986 rc = -EOPNOTSUPP;
4987 } else {
4988 find_file_posix_info(rsp, fp, work->response_buf);
4989 }
4990 break;
4991 default:
4992 ksmbd_debug(SMB, "fileinfoclass %d not supported yet\n",
4993 fileinfoclass);
4994 rc = -EOPNOTSUPP;
4995 }
4996 if (!rc)
4997 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4998 rsp, work->response_buf);
4999 ksmbd_fd_put(work, fp);
5000 return rc;
5001 }
5002
5003 static int smb2_get_info_filesystem(struct ksmbd_work *work,
5004 struct smb2_query_info_req *req,
5005 struct smb2_query_info_rsp *rsp)
5006 {
5007 struct ksmbd_session *sess = work->sess;
5008 struct ksmbd_conn *conn = work->conn;
5009 struct ksmbd_share_config *share = work->tcon->share_conf;
5010 int fsinfoclass = 0;
5011 struct kstatfs stfs;
5012 struct path path;
5013 int rc = 0, len;
5014
5015 if (!share->path)
5016 return -EIO;
5017
5018 rc = kern_path(share->path, LOOKUP_NO_SYMLINKS, &path);
5019 if (rc) {
5020 pr_err("cannot create vfs path\n");
5021 return -EIO;
5022 }
5023
5024 rc = vfs_statfs(&path, &stfs);
5025 if (rc) {
5026 pr_err("cannot do stat of path %s\n", share->path);
5027 path_put(&path);
5028 return -EIO;
5029 }
5030
5031 fsinfoclass = req->FileInfoClass;
5032
5033 switch (fsinfoclass) {
5034 case FS_DEVICE_INFORMATION:
5035 {
5036 struct filesystem_device_info *info;
5037
5038 info = (struct filesystem_device_info *)rsp->Buffer;
5039
5040 info->DeviceType = cpu_to_le32(stfs.f_type);
5041 info->DeviceCharacteristics = cpu_to_le32(0x00000020);
5042 rsp->OutputBufferLength = cpu_to_le32(8);
5043 break;
5044 }
5045 case FS_ATTRIBUTE_INFORMATION:
5046 {
5047 struct filesystem_attribute_info *info;
5048 size_t sz;
5049
5050 info = (struct filesystem_attribute_info *)rsp->Buffer;
5051 info->Attributes = cpu_to_le32(FILE_SUPPORTS_OBJECT_IDS |
5052 FILE_PERSISTENT_ACLS |
5053 FILE_UNICODE_ON_DISK |
5054 FILE_CASE_PRESERVED_NAMES |
5055 FILE_CASE_SENSITIVE_SEARCH |
5056 FILE_SUPPORTS_BLOCK_REFCOUNTING);
5057
5058 info->Attributes |= cpu_to_le32(server_conf.share_fake_fscaps);
5059
5060 if (test_share_config_flag(work->tcon->share_conf,
5061 KSMBD_SHARE_FLAG_STREAMS))
5062 info->Attributes |= cpu_to_le32(FILE_NAMED_STREAMS);
5063
5064 info->MaxPathNameComponentLength = cpu_to_le32(stfs.f_namelen);
5065 len = smbConvertToUTF16((__le16 *)info->FileSystemName,
5066 "NTFS", PATH_MAX, conn->local_nls, 0);
5067 len = len * 2;
5068 info->FileSystemNameLen = cpu_to_le32(len);
5069 sz = sizeof(struct filesystem_attribute_info) - 2 + len;
5070 rsp->OutputBufferLength = cpu_to_le32(sz);
5071 break;
5072 }
5073 case FS_VOLUME_INFORMATION:
5074 {
5075 struct filesystem_vol_info *info;
5076 size_t sz;
5077 unsigned int serial_crc = 0;
5078
5079 info = (struct filesystem_vol_info *)(rsp->Buffer);
5080 info->VolumeCreationTime = 0;
5081 serial_crc = crc32_le(serial_crc, share->name,
5082 strlen(share->name));
5083 serial_crc = crc32_le(serial_crc, share->path,
5084 strlen(share->path));
5085 serial_crc = crc32_le(serial_crc, ksmbd_netbios_name(),
5086 strlen(ksmbd_netbios_name()));
5087 /* Taking dummy value of serial number*/
5088 info->SerialNumber = cpu_to_le32(serial_crc);
5089 len = smbConvertToUTF16((__le16 *)info->VolumeLabel,
5090 share->name, PATH_MAX,
5091 conn->local_nls, 0);
5092 len = len * 2;
5093 info->VolumeLabelSize = cpu_to_le32(len);
5094 info->Reserved = 0;
5095 sz = sizeof(struct filesystem_vol_info) - 2 + len;
5096 rsp->OutputBufferLength = cpu_to_le32(sz);
5097 break;
5098 }
5099 case FS_SIZE_INFORMATION:
5100 {
5101 struct filesystem_info *info;
5102
5103 info = (struct filesystem_info *)(rsp->Buffer);
5104 info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks);
5105 info->FreeAllocationUnits = cpu_to_le64(stfs.f_bfree);
5106 info->SectorsPerAllocationUnit = cpu_to_le32(1);
5107 info->BytesPerSector = cpu_to_le32(stfs.f_bsize);
5108 rsp->OutputBufferLength = cpu_to_le32(24);
5109 break;
5110 }
5111 case FS_FULL_SIZE_INFORMATION:
5112 {
5113 struct smb2_fs_full_size_info *info;
5114
5115 info = (struct smb2_fs_full_size_info *)(rsp->Buffer);
5116 info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks);
5117 info->CallerAvailableAllocationUnits =
5118 cpu_to_le64(stfs.f_bavail);
5119 info->ActualAvailableAllocationUnits =
5120 cpu_to_le64(stfs.f_bfree);
5121 info->SectorsPerAllocationUnit = cpu_to_le32(1);
5122 info->BytesPerSector = cpu_to_le32(stfs.f_bsize);
5123 rsp->OutputBufferLength = cpu_to_le32(32);
5124 break;
5125 }
5126 case FS_OBJECT_ID_INFORMATION:
5127 {
5128 struct object_id_info *info;
5129
5130 info = (struct object_id_info *)(rsp->Buffer);
5131
5132 if (!user_guest(sess->user))
5133 memcpy(info->objid, user_passkey(sess->user), 16);
5134 else
5135 memset(info->objid, 0, 16);
5136
5137 info->extended_info.magic = cpu_to_le32(EXTENDED_INFO_MAGIC);
5138 info->extended_info.version = cpu_to_le32(1);
5139 info->extended_info.release = cpu_to_le32(1);
5140 info->extended_info.rel_date = 0;
5141 memcpy(info->extended_info.version_string, "1.1.0", strlen("1.1.0"));
5142 rsp->OutputBufferLength = cpu_to_le32(64);
5143 break;
5144 }
5145 case FS_SECTOR_SIZE_INFORMATION:
5146 {
5147 struct smb3_fs_ss_info *info;
5148 unsigned int sector_size =
5149 min_t(unsigned int, path.mnt->mnt_sb->s_blocksize, 4096);
5150
5151 info = (struct smb3_fs_ss_info *)(rsp->Buffer);
5152
5153 info->LogicalBytesPerSector = cpu_to_le32(sector_size);
5154 info->PhysicalBytesPerSectorForAtomicity =
5155 cpu_to_le32(sector_size);
5156 info->PhysicalBytesPerSectorForPerf = cpu_to_le32(sector_size);
5157 info->FSEffPhysicalBytesPerSectorForAtomicity =
5158 cpu_to_le32(sector_size);
5159 info->Flags = cpu_to_le32(SSINFO_FLAGS_ALIGNED_DEVICE |
5160 SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE);
5161 info->ByteOffsetForSectorAlignment = 0;
5162 info->ByteOffsetForPartitionAlignment = 0;
5163 rsp->OutputBufferLength = cpu_to_le32(28);
5164 break;
5165 }
5166 case FS_CONTROL_INFORMATION:
5167 {
5168 /*
5169 * TODO : The current implementation is based on
5170 * test result with win7(NTFS) server. It's need to
5171 * modify this to get valid Quota values
5172 * from Linux kernel
5173 */
5174 struct smb2_fs_control_info *info;
5175
5176 info = (struct smb2_fs_control_info *)(rsp->Buffer);
5177 info->FreeSpaceStartFiltering = 0;
5178 info->FreeSpaceThreshold = 0;
5179 info->FreeSpaceStopFiltering = 0;
5180 info->DefaultQuotaThreshold = cpu_to_le64(SMB2_NO_FID);
5181 info->DefaultQuotaLimit = cpu_to_le64(SMB2_NO_FID);
5182 info->Padding = 0;
5183 rsp->OutputBufferLength = cpu_to_le32(48);
5184 break;
5185 }
5186 case FS_POSIX_INFORMATION:
5187 {
5188 struct filesystem_posix_info *info;
5189
5190 if (!work->tcon->posix_extensions) {
5191 pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n");
5192 rc = -EOPNOTSUPP;
5193 } else {
5194 info = (struct filesystem_posix_info *)(rsp->Buffer);
5195 info->OptimalTransferSize = cpu_to_le32(stfs.f_bsize);
5196 info->BlockSize = cpu_to_le32(stfs.f_bsize);
5197 info->TotalBlocks = cpu_to_le64(stfs.f_blocks);
5198 info->BlocksAvail = cpu_to_le64(stfs.f_bfree);
5199 info->UserBlocksAvail = cpu_to_le64(stfs.f_bavail);
5200 info->TotalFileNodes = cpu_to_le64(stfs.f_files);
5201 info->FreeFileNodes = cpu_to_le64(stfs.f_ffree);
5202 rsp->OutputBufferLength = cpu_to_le32(56);
5203 }
5204 break;
5205 }
5206 default:
5207 path_put(&path);
5208 return -EOPNOTSUPP;
5209 }
5210 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
5211 rsp, work->response_buf);
5212 path_put(&path);
5213 return rc;
5214 }
5215
5216 static int smb2_get_info_sec(struct ksmbd_work *work,
5217 struct smb2_query_info_req *req,
5218 struct smb2_query_info_rsp *rsp)
5219 {
5220 struct ksmbd_file *fp;
5221 struct mnt_idmap *idmap;
5222 struct smb_ntsd *pntsd = (struct smb_ntsd *)rsp->Buffer, *ppntsd = NULL;
5223 struct smb_fattr fattr = {{0}};
5224 struct inode *inode;
5225 __u32 secdesclen = 0;
5226 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
5227 int addition_info = le32_to_cpu(req->AdditionalInformation);
5228 int rc = 0, ppntsd_size = 0;
5229
5230 if (addition_info & ~(OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO |
5231 PROTECTED_DACL_SECINFO |
5232 UNPROTECTED_DACL_SECINFO)) {
5233 ksmbd_debug(SMB, "Unsupported addition info: 0x%x)\n",
5234 addition_info);
5235
5236 pntsd->revision = cpu_to_le16(1);
5237 pntsd->type = cpu_to_le16(SELF_RELATIVE | DACL_PROTECTED);
5238 pntsd->osidoffset = 0;
5239 pntsd->gsidoffset = 0;
5240 pntsd->sacloffset = 0;
5241 pntsd->dacloffset = 0;
5242
5243 secdesclen = sizeof(struct smb_ntsd);
5244 rsp->OutputBufferLength = cpu_to_le32(secdesclen);
5245
5246 return 0;
5247 }
5248
5249 if (work->next_smb2_rcv_hdr_off) {
5250 if (!has_file_id(req->VolatileFileId)) {
5251 ksmbd_debug(SMB, "Compound request set FID = %llu\n",
5252 work->compound_fid);
5253 id = work->compound_fid;
5254 pid = work->compound_pfid;
5255 }
5256 }
5257
5258 if (!has_file_id(id)) {
5259 id = req->VolatileFileId;
5260 pid = req->PersistentFileId;
5261 }
5262
5263 fp = ksmbd_lookup_fd_slow(work, id, pid);
5264 if (!fp)
5265 return -ENOENT;
5266
5267 idmap = file_mnt_idmap(fp->filp);
5268 inode = file_inode(fp->filp);
5269 ksmbd_acls_fattr(&fattr, idmap, inode);
5270
5271 if (test_share_config_flag(work->tcon->share_conf,
5272 KSMBD_SHARE_FLAG_ACL_XATTR))
5273 ppntsd_size = ksmbd_vfs_get_sd_xattr(work->conn, idmap,
5274 fp->filp->f_path.dentry,
5275 &ppntsd);
5276
5277 /* Check if sd buffer size exceeds response buffer size */
5278 if (smb2_resp_buf_len(work, 8) > ppntsd_size)
5279 rc = build_sec_desc(idmap, pntsd, ppntsd, ppntsd_size,
5280 addition_info, &secdesclen, &fattr);
5281 posix_acl_release(fattr.cf_acls);
5282 posix_acl_release(fattr.cf_dacls);
5283 kfree(ppntsd);
5284 ksmbd_fd_put(work, fp);
5285 if (rc)
5286 return rc;
5287
5288 rsp->OutputBufferLength = cpu_to_le32(secdesclen);
5289 return 0;
5290 }
5291
5292 /**
5293 * smb2_query_info() - handler for smb2 query info command
5294 * @work: smb work containing query info request buffer
5295 *
5296 * Return: 0 on success, otherwise error
5297 */
5298 int smb2_query_info(struct ksmbd_work *work)
5299 {
5300 struct smb2_query_info_req *req;
5301 struct smb2_query_info_rsp *rsp;
5302 int rc = 0;
5303
5304 WORK_BUFFERS(work, req, rsp);
5305
5306 ksmbd_debug(SMB, "GOT query info request\n");
5307
5308 switch (req->InfoType) {
5309 case SMB2_O_INFO_FILE:
5310 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n");
5311 rc = smb2_get_info_file(work, req, rsp);
5312 break;
5313 case SMB2_O_INFO_FILESYSTEM:
5314 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILESYSTEM\n");
5315 rc = smb2_get_info_filesystem(work, req, rsp);
5316 break;
5317 case SMB2_O_INFO_SECURITY:
5318 ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n");
5319 rc = smb2_get_info_sec(work, req, rsp);
5320 break;
5321 default:
5322 ksmbd_debug(SMB, "InfoType %d not supported yet\n",
5323 req->InfoType);
5324 rc = -EOPNOTSUPP;
5325 }
5326
5327 if (!rc) {
5328 rsp->StructureSize = cpu_to_le16(9);
5329 rsp->OutputBufferOffset = cpu_to_le16(72);
5330 rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
5331 offsetof(struct smb2_query_info_rsp, Buffer) +
5332 le32_to_cpu(rsp->OutputBufferLength));
5333 }
5334
5335 if (rc < 0) {
5336 if (rc == -EACCES)
5337 rsp->hdr.Status = STATUS_ACCESS_DENIED;
5338 else if (rc == -ENOENT)
5339 rsp->hdr.Status = STATUS_FILE_CLOSED;
5340 else if (rc == -EIO)
5341 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
5342 else if (rc == -ENOMEM)
5343 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
5344 else if (rc == -EOPNOTSUPP || rsp->hdr.Status == 0)
5345 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
5346 smb2_set_err_rsp(work);
5347
5348 ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n",
5349 rc);
5350 return rc;
5351 }
5352 return 0;
5353 }
5354
5355 /**
5356 * smb2_close_pipe() - handler for closing IPC pipe
5357 * @work: smb work containing close request buffer
5358 *
5359 * Return: 0
5360 */
5361 static noinline int smb2_close_pipe(struct ksmbd_work *work)
5362 {
5363 u64 id;
5364 struct smb2_close_req *req;
5365 struct smb2_close_rsp *rsp;
5366
5367 WORK_BUFFERS(work, req, rsp);
5368
5369 id = req->VolatileFileId;
5370 ksmbd_session_rpc_close(work->sess, id);
5371
5372 rsp->StructureSize = cpu_to_le16(60);
5373 rsp->Flags = 0;
5374 rsp->Reserved = 0;
5375 rsp->CreationTime = 0;
5376 rsp->LastAccessTime = 0;
5377 rsp->LastWriteTime = 0;
5378 rsp->ChangeTime = 0;
5379 rsp->AllocationSize = 0;
5380 rsp->EndOfFile = 0;
5381 rsp->Attributes = 0;
5382
5383 return ksmbd_iov_pin_rsp(work, (void *)rsp,
5384 sizeof(struct smb2_close_rsp));
5385 }
5386
5387 /**
5388 * smb2_close() - handler for smb2 close file command
5389 * @work: smb work containing close request buffer
5390 *
5391 * Return: 0
5392 */
5393 int smb2_close(struct ksmbd_work *work)
5394 {
5395 u64 volatile_id = KSMBD_NO_FID;
5396 u64 sess_id;
5397 struct smb2_close_req *req;
5398 struct smb2_close_rsp *rsp;
5399 struct ksmbd_conn *conn = work->conn;
5400 struct ksmbd_file *fp;
5401 struct inode *inode;
5402 u64 time;
5403 int err = 0;
5404
5405 WORK_BUFFERS(work, req, rsp);
5406
5407 if (test_share_config_flag(work->tcon->share_conf,
5408 KSMBD_SHARE_FLAG_PIPE)) {
5409 ksmbd_debug(SMB, "IPC pipe close request\n");
5410 return smb2_close_pipe(work);
5411 }
5412
5413 sess_id = le64_to_cpu(req->hdr.SessionId);
5414 if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)
5415 sess_id = work->compound_sid;
5416
5417 work->compound_sid = 0;
5418 if (check_session_id(conn, sess_id)) {
5419 work->compound_sid = sess_id;
5420 } else {
5421 rsp->hdr.Status = STATUS_USER_SESSION_DELETED;
5422 if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)
5423 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
5424 err = -EBADF;
5425 goto out;
5426 }
5427
5428 if (work->next_smb2_rcv_hdr_off &&
5429 !has_file_id(req->VolatileFileId)) {
5430 if (!has_file_id(work->compound_fid)) {
5431 /* file already closed, return FILE_CLOSED */
5432 ksmbd_debug(SMB, "file already closed\n");
5433 rsp->hdr.Status = STATUS_FILE_CLOSED;
5434 err = -EBADF;
5435 goto out;
5436 } else {
5437 ksmbd_debug(SMB,
5438 "Compound request set FID = %llu:%llu\n",
5439 work->compound_fid,
5440 work->compound_pfid);
5441 volatile_id = work->compound_fid;
5442
5443 /* file closed, stored id is not valid anymore */
5444 work->compound_fid = KSMBD_NO_FID;
5445 work->compound_pfid = KSMBD_NO_FID;
5446 }
5447 } else {
5448 volatile_id = req->VolatileFileId;
5449 }
5450 ksmbd_debug(SMB, "volatile_id = %llu\n", volatile_id);
5451
5452 rsp->StructureSize = cpu_to_le16(60);
5453 rsp->Reserved = 0;
5454
5455 if (req->Flags == SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB) {
5456 fp = ksmbd_lookup_fd_fast(work, volatile_id);
5457 if (!fp) {
5458 err = -ENOENT;
5459 goto out;
5460 }
5461
5462 inode = file_inode(fp->filp);
5463 rsp->Flags = SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB;
5464 rsp->AllocationSize = S_ISDIR(inode->i_mode) ? 0 :
5465 cpu_to_le64(inode->i_blocks << 9);
5466 rsp->EndOfFile = cpu_to_le64(inode->i_size);
5467 rsp->Attributes = fp->f_ci->m_fattr;
5468 rsp->CreationTime = cpu_to_le64(fp->create_time);
5469 time = ksmbd_UnixTimeToNT(inode_get_atime(inode));
5470 rsp->LastAccessTime = cpu_to_le64(time);
5471 time = ksmbd_UnixTimeToNT(inode_get_mtime(inode));
5472 rsp->LastWriteTime = cpu_to_le64(time);
5473 time = ksmbd_UnixTimeToNT(inode_get_ctime(inode));
5474 rsp->ChangeTime = cpu_to_le64(time);
5475 ksmbd_fd_put(work, fp);
5476 } else {
5477 rsp->Flags = 0;
5478 rsp->AllocationSize = 0;
5479 rsp->EndOfFile = 0;
5480 rsp->Attributes = 0;
5481 rsp->CreationTime = 0;
5482 rsp->LastAccessTime = 0;
5483 rsp->LastWriteTime = 0;
5484 rsp->ChangeTime = 0;
5485 }
5486
5487 err = ksmbd_close_fd(work, volatile_id);
5488 out:
5489 if (!err)
5490 err = ksmbd_iov_pin_rsp(work, (void *)rsp,
5491 sizeof(struct smb2_close_rsp));
5492
5493 if (err) {
5494 if (rsp->hdr.Status == 0)
5495 rsp->hdr.Status = STATUS_FILE_CLOSED;
5496 smb2_set_err_rsp(work);
5497 }
5498
5499 return err;
5500 }
5501
5502 /**
5503 * smb2_echo() - handler for smb2 echo(ping) command
5504 * @work: smb work containing echo request buffer
5505 *
5506 * Return: 0
5507 */
5508 int smb2_echo(struct ksmbd_work *work)
5509 {
5510 struct smb2_echo_rsp *rsp = smb2_get_msg(work->response_buf);
5511
5512 if (work->next_smb2_rcv_hdr_off)
5513 rsp = ksmbd_resp_buf_next(work);
5514
5515 rsp->StructureSize = cpu_to_le16(4);
5516 rsp->Reserved = 0;
5517 return ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_echo_rsp));
5518 }
5519
5520 static int smb2_rename(struct ksmbd_work *work,
5521 struct ksmbd_file *fp,
5522 struct smb2_file_rename_info *file_info,
5523 struct nls_table *local_nls)
5524 {
5525 struct ksmbd_share_config *share = fp->tcon->share_conf;
5526 char *new_name = NULL;
5527 int rc, flags = 0;
5528
5529 ksmbd_debug(SMB, "setting FILE_RENAME_INFO\n");
5530 new_name = smb2_get_name(file_info->FileName,
5531 le32_to_cpu(file_info->FileNameLength),
5532 local_nls);
5533 if (IS_ERR(new_name))
5534 return PTR_ERR(new_name);
5535
5536 if (strchr(new_name, ':')) {
5537 int s_type;
5538 char *xattr_stream_name, *stream_name = NULL;
5539 size_t xattr_stream_size;
5540 int len;
5541
5542 rc = parse_stream_name(new_name, &stream_name, &s_type);
5543 if (rc < 0)
5544 goto out;
5545
5546 len = strlen(new_name);
5547 if (len > 0 && new_name[len - 1] != '/') {
5548 pr_err("not allow base filename in rename\n");
5549 rc = -ESHARE;
5550 goto out;
5551 }
5552
5553 rc = ksmbd_vfs_xattr_stream_name(stream_name,
5554 &xattr_stream_name,
5555 &xattr_stream_size,
5556 s_type);
5557 if (rc)
5558 goto out;
5559
5560 rc = ksmbd_vfs_setxattr(file_mnt_idmap(fp->filp),
5561 &fp->filp->f_path,
5562 xattr_stream_name,
5563 NULL, 0, 0, true);
5564 if (rc < 0) {
5565 pr_err("failed to store stream name in xattr: %d\n",
5566 rc);
5567 rc = -EINVAL;
5568 goto out;
5569 }
5570
5571 goto out;
5572 }
5573
5574 ksmbd_debug(SMB, "new name %s\n", new_name);
5575 if (ksmbd_share_veto_filename(share, new_name)) {
5576 rc = -ENOENT;
5577 ksmbd_debug(SMB, "Can't rename vetoed file: %s\n", new_name);
5578 goto out;
5579 }
5580
5581 if (!file_info->ReplaceIfExists)
5582 flags = RENAME_NOREPLACE;
5583
5584 smb_break_all_levII_oplock(work, fp, 0);
5585 rc = ksmbd_vfs_rename(work, &fp->filp->f_path, new_name, flags);
5586 out:
5587 kfree(new_name);
5588 return rc;
5589 }
5590
5591 static int smb2_create_link(struct ksmbd_work *work,
5592 struct ksmbd_share_config *share,
5593 struct smb2_file_link_info *file_info,
5594 unsigned int buf_len, struct file *filp,
5595 struct nls_table *local_nls)
5596 {
5597 char *link_name = NULL, *target_name = NULL, *pathname = NULL;
5598 struct path path, parent_path;
5599 bool file_present = false;
5600 int rc;
5601
5602 if (buf_len < (u64)sizeof(struct smb2_file_link_info) +
5603 le32_to_cpu(file_info->FileNameLength))
5604 return -EINVAL;
5605
5606 ksmbd_debug(SMB, "setting FILE_LINK_INFORMATION\n");
5607 pathname = kmalloc(PATH_MAX, GFP_KERNEL);
5608 if (!pathname)
5609 return -ENOMEM;
5610
5611 link_name = smb2_get_name(file_info->FileName,
5612 le32_to_cpu(file_info->FileNameLength),
5613 local_nls);
5614 if (IS_ERR(link_name) || S_ISDIR(file_inode(filp)->i_mode)) {
5615 rc = -EINVAL;
5616 goto out;
5617 }
5618
5619 ksmbd_debug(SMB, "link name is %s\n", link_name);
5620 target_name = file_path(filp, pathname, PATH_MAX);
5621 if (IS_ERR(target_name)) {
5622 rc = -EINVAL;
5623 goto out;
5624 }
5625
5626 ksmbd_debug(SMB, "target name is %s\n", target_name);
5627 rc = ksmbd_vfs_kern_path_locked(work, link_name, LOOKUP_NO_SYMLINKS,
5628 &parent_path, &path, 0);
5629 if (rc) {
5630 if (rc != -ENOENT)
5631 goto out;
5632 } else
5633 file_present = true;
5634
5635 if (file_info->ReplaceIfExists) {
5636 if (file_present) {
5637 rc = ksmbd_vfs_remove_file(work, &path);
5638 if (rc) {
5639 rc = -EINVAL;
5640 ksmbd_debug(SMB, "cannot delete %s\n",
5641 link_name);
5642 goto out;
5643 }
5644 }
5645 } else {
5646 if (file_present) {
5647 rc = -EEXIST;
5648 ksmbd_debug(SMB, "link already exists\n");
5649 goto out;
5650 }
5651 }
5652
5653 rc = ksmbd_vfs_link(work, target_name, link_name);
5654 if (rc)
5655 rc = -EINVAL;
5656 out:
5657 if (file_present)
5658 ksmbd_vfs_kern_path_unlock(&parent_path, &path);
5659
5660 if (!IS_ERR(link_name))
5661 kfree(link_name);
5662 kfree(pathname);
5663 return rc;
5664 }
5665
5666 static int set_file_basic_info(struct ksmbd_file *fp,
5667 struct smb2_file_basic_info *file_info,
5668 struct ksmbd_share_config *share)
5669 {
5670 struct iattr attrs;
5671 struct file *filp;
5672 struct inode *inode;
5673 struct mnt_idmap *idmap;
5674 int rc = 0;
5675
5676 if (!(fp->daccess & FILE_WRITE_ATTRIBUTES_LE))
5677 return -EACCES;
5678
5679 attrs.ia_valid = 0;
5680 filp = fp->filp;
5681 inode = file_inode(filp);
5682 idmap = file_mnt_idmap(filp);
5683
5684 if (file_info->CreationTime)
5685 fp->create_time = le64_to_cpu(file_info->CreationTime);
5686
5687 if (file_info->LastAccessTime) {
5688 attrs.ia_atime = ksmbd_NTtimeToUnix(file_info->LastAccessTime);
5689 attrs.ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
5690 }
5691
5692 attrs.ia_valid |= ATTR_CTIME;
5693 if (file_info->ChangeTime)
5694 attrs.ia_ctime = ksmbd_NTtimeToUnix(file_info->ChangeTime);
5695 else
5696 attrs.ia_ctime = inode_get_ctime(inode);
5697
5698 if (file_info->LastWriteTime) {
5699 attrs.ia_mtime = ksmbd_NTtimeToUnix(file_info->LastWriteTime);
5700 attrs.ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
5701 }
5702
5703 if (file_info->Attributes) {
5704 if (!S_ISDIR(inode->i_mode) &&
5705 file_info->Attributes & FILE_ATTRIBUTE_DIRECTORY_LE) {
5706 pr_err("can't change a file to a directory\n");
5707 return -EINVAL;
5708 }
5709
5710 if (!(S_ISDIR(inode->i_mode) && file_info->Attributes == FILE_ATTRIBUTE_NORMAL_LE))
5711 fp->f_ci->m_fattr = file_info->Attributes |
5712 (fp->f_ci->m_fattr & FILE_ATTRIBUTE_DIRECTORY_LE);
5713 }
5714
5715 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_STORE_DOS_ATTRS) &&
5716 (file_info->CreationTime || file_info->Attributes)) {
5717 struct xattr_dos_attrib da = {0};
5718
5719 da.version = 4;
5720 da.itime = fp->itime;
5721 da.create_time = fp->create_time;
5722 da.attr = le32_to_cpu(fp->f_ci->m_fattr);
5723 da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME |
5724 XATTR_DOSINFO_ITIME;
5725
5726 rc = ksmbd_vfs_set_dos_attrib_xattr(idmap, &filp->f_path, &da,
5727 true);
5728 if (rc)
5729 ksmbd_debug(SMB,
5730 "failed to restore file attribute in EA\n");
5731 rc = 0;
5732 }
5733
5734 if (attrs.ia_valid) {
5735 struct dentry *dentry = filp->f_path.dentry;
5736 struct inode *inode = d_inode(dentry);
5737
5738 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
5739 return -EACCES;
5740
5741 inode_lock(inode);
5742 inode_set_ctime_to_ts(inode, attrs.ia_ctime);
5743 attrs.ia_valid &= ~ATTR_CTIME;
5744 rc = notify_change(idmap, dentry, &attrs, NULL);
5745 inode_unlock(inode);
5746 }
5747 return rc;
5748 }
5749
5750 static int set_file_allocation_info(struct ksmbd_work *work,
5751 struct ksmbd_file *fp,
5752 struct smb2_file_alloc_info *file_alloc_info)
5753 {
5754 /*
5755 * TODO : It's working fine only when store dos attributes
5756 * is not yes. need to implement a logic which works
5757 * properly with any smb.conf option
5758 */
5759
5760 loff_t alloc_blks;
5761 struct inode *inode;
5762 int rc;
5763
5764 if (!(fp->daccess & FILE_WRITE_DATA_LE))
5765 return -EACCES;
5766
5767 alloc_blks = (le64_to_cpu(file_alloc_info->AllocationSize) + 511) >> 9;
5768 inode = file_inode(fp->filp);
5769
5770 if (alloc_blks > inode->i_blocks) {
5771 smb_break_all_levII_oplock(work, fp, 1);
5772 rc = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0,
5773 alloc_blks * 512);
5774 if (rc && rc != -EOPNOTSUPP) {
5775 pr_err("vfs_fallocate is failed : %d\n", rc);
5776 return rc;
5777 }
5778 } else if (alloc_blks < inode->i_blocks) {
5779 loff_t size;
5780
5781 /*
5782 * Allocation size could be smaller than original one
5783 * which means allocated blocks in file should be
5784 * deallocated. use truncate to cut out it, but inode
5785 * size is also updated with truncate offset.
5786 * inode size is retained by backup inode size.
5787 */
5788 size = i_size_read(inode);
5789 rc = ksmbd_vfs_truncate(work, fp, alloc_blks * 512);
5790 if (rc) {
5791 pr_err("truncate failed!, err %d\n", rc);
5792 return rc;
5793 }
5794 if (size < alloc_blks * 512)
5795 i_size_write(inode, size);
5796 }
5797 return 0;
5798 }
5799
5800 static int set_end_of_file_info(struct ksmbd_work *work, struct ksmbd_file *fp,
5801 struct smb2_file_eof_info *file_eof_info)
5802 {
5803 loff_t newsize;
5804 struct inode *inode;
5805 int rc;
5806
5807 if (!(fp->daccess & FILE_WRITE_DATA_LE))
5808 return -EACCES;
5809
5810 newsize = le64_to_cpu(file_eof_info->EndOfFile);
5811 inode = file_inode(fp->filp);
5812
5813 /*
5814 * If FILE_END_OF_FILE_INFORMATION of set_info_file is called
5815 * on FAT32 shared device, truncate execution time is too long
5816 * and network error could cause from windows client. because
5817 * truncate of some filesystem like FAT32 fill zero data in
5818 * truncated range.
5819 */
5820 if (inode->i_sb->s_magic != MSDOS_SUPER_MAGIC) {
5821 ksmbd_debug(SMB, "truncated to newsize %lld\n", newsize);
5822 rc = ksmbd_vfs_truncate(work, fp, newsize);
5823 if (rc) {
5824 ksmbd_debug(SMB, "truncate failed!, err %d\n", rc);
5825 if (rc != -EAGAIN)
5826 rc = -EBADF;
5827 return rc;
5828 }
5829 }
5830 return 0;
5831 }
5832
5833 static int set_rename_info(struct ksmbd_work *work, struct ksmbd_file *fp,
5834 struct smb2_file_rename_info *rename_info,
5835 unsigned int buf_len)
5836 {
5837 if (!(fp->daccess & FILE_DELETE_LE)) {
5838 pr_err("no right to delete : 0x%x\n", fp->daccess);
5839 return -EACCES;
5840 }
5841
5842 if (buf_len < (u64)sizeof(struct smb2_file_rename_info) +
5843 le32_to_cpu(rename_info->FileNameLength))
5844 return -EINVAL;
5845
5846 if (!le32_to_cpu(rename_info->FileNameLength))
5847 return -EINVAL;
5848
5849 return smb2_rename(work, fp, rename_info, work->conn->local_nls);
5850 }
5851
5852 static int set_file_disposition_info(struct ksmbd_file *fp,
5853 struct smb2_file_disposition_info *file_info)
5854 {
5855 struct inode *inode;
5856
5857 if (!(fp->daccess & FILE_DELETE_LE)) {
5858 pr_err("no right to delete : 0x%x\n", fp->daccess);
5859 return -EACCES;
5860 }
5861
5862 inode = file_inode(fp->filp);
5863 if (file_info->DeletePending) {
5864 if (S_ISDIR(inode->i_mode) &&
5865 ksmbd_vfs_empty_dir(fp) == -ENOTEMPTY)
5866 return -EBUSY;
5867 ksmbd_set_inode_pending_delete(fp);
5868 } else {
5869 ksmbd_clear_inode_pending_delete(fp);
5870 }
5871 return 0;
5872 }
5873
5874 static int set_file_position_info(struct ksmbd_file *fp,
5875 struct smb2_file_pos_info *file_info)
5876 {
5877 loff_t current_byte_offset;
5878 unsigned long sector_size;
5879 struct inode *inode;
5880
5881 inode = file_inode(fp->filp);
5882 current_byte_offset = le64_to_cpu(file_info->CurrentByteOffset);
5883 sector_size = inode->i_sb->s_blocksize;
5884
5885 if (current_byte_offset < 0 ||
5886 (fp->coption == FILE_NO_INTERMEDIATE_BUFFERING_LE &&
5887 current_byte_offset & (sector_size - 1))) {
5888 pr_err("CurrentByteOffset is not valid : %llu\n",
5889 current_byte_offset);
5890 return -EINVAL;
5891 }
5892
5893 fp->filp->f_pos = current_byte_offset;
5894 return 0;
5895 }
5896
5897 static int set_file_mode_info(struct ksmbd_file *fp,
5898 struct smb2_file_mode_info *file_info)
5899 {
5900 __le32 mode;
5901
5902 mode = file_info->Mode;
5903
5904 if ((mode & ~FILE_MODE_INFO_MASK)) {
5905 pr_err("Mode is not valid : 0x%x\n", le32_to_cpu(mode));
5906 return -EINVAL;
5907 }
5908
5909 /*
5910 * TODO : need to implement consideration for
5911 * FILE_SYNCHRONOUS_IO_ALERT and FILE_SYNCHRONOUS_IO_NONALERT
5912 */
5913 ksmbd_vfs_set_fadvise(fp->filp, mode);
5914 fp->coption = mode;
5915 return 0;
5916 }
5917
5918 /**
5919 * smb2_set_info_file() - handler for smb2 set info command
5920 * @work: smb work containing set info command buffer
5921 * @fp: ksmbd_file pointer
5922 * @req: request buffer pointer
5923 * @share: ksmbd_share_config pointer
5924 *
5925 * Return: 0 on success, otherwise error
5926 * TODO: need to implement an error handling for STATUS_INFO_LENGTH_MISMATCH
5927 */
5928 static int smb2_set_info_file(struct ksmbd_work *work, struct ksmbd_file *fp,
5929 struct smb2_set_info_req *req,
5930 struct ksmbd_share_config *share)
5931 {
5932 unsigned int buf_len = le32_to_cpu(req->BufferLength);
5933
5934 switch (req->FileInfoClass) {
5935 case FILE_BASIC_INFORMATION:
5936 {
5937 if (buf_len < sizeof(struct smb2_file_basic_info))
5938 return -EINVAL;
5939
5940 return set_file_basic_info(fp, (struct smb2_file_basic_info *)req->Buffer, share);
5941 }
5942 case FILE_ALLOCATION_INFORMATION:
5943 {
5944 if (buf_len < sizeof(struct smb2_file_alloc_info))
5945 return -EINVAL;
5946
5947 return set_file_allocation_info(work, fp,
5948 (struct smb2_file_alloc_info *)req->Buffer);
5949 }
5950 case FILE_END_OF_FILE_INFORMATION:
5951 {
5952 if (buf_len < sizeof(struct smb2_file_eof_info))
5953 return -EINVAL;
5954
5955 return set_end_of_file_info(work, fp,
5956 (struct smb2_file_eof_info *)req->Buffer);
5957 }
5958 case FILE_RENAME_INFORMATION:
5959 {
5960 if (buf_len < sizeof(struct smb2_file_rename_info))
5961 return -EINVAL;
5962
5963 return set_rename_info(work, fp,
5964 (struct smb2_file_rename_info *)req->Buffer,
5965 buf_len);
5966 }
5967 case FILE_LINK_INFORMATION:
5968 {
5969 if (buf_len < sizeof(struct smb2_file_link_info))
5970 return -EINVAL;
5971
5972 return smb2_create_link(work, work->tcon->share_conf,
5973 (struct smb2_file_link_info *)req->Buffer,
5974 buf_len, fp->filp,
5975 work->conn->local_nls);
5976 }
5977 case FILE_DISPOSITION_INFORMATION:
5978 {
5979 if (buf_len < sizeof(struct smb2_file_disposition_info))
5980 return -EINVAL;
5981
5982 return set_file_disposition_info(fp,
5983 (struct smb2_file_disposition_info *)req->Buffer);
5984 }
5985 case FILE_FULL_EA_INFORMATION:
5986 {
5987 if (!(fp->daccess & FILE_WRITE_EA_LE)) {
5988 pr_err("Not permitted to write ext attr: 0x%x\n",
5989 fp->daccess);
5990 return -EACCES;
5991 }
5992
5993 if (buf_len < sizeof(struct smb2_ea_info))
5994 return -EINVAL;
5995
5996 return smb2_set_ea((struct smb2_ea_info *)req->Buffer,
5997 buf_len, &fp->filp->f_path, true);
5998 }
5999 case FILE_POSITION_INFORMATION:
6000 {
6001 if (buf_len < sizeof(struct smb2_file_pos_info))
6002 return -EINVAL;
6003
6004 return set_file_position_info(fp, (struct smb2_file_pos_info *)req->Buffer);
6005 }
6006 case FILE_MODE_INFORMATION:
6007 {
6008 if (buf_len < sizeof(struct smb2_file_mode_info))
6009 return -EINVAL;
6010
6011 return set_file_mode_info(fp, (struct smb2_file_mode_info *)req->Buffer);
6012 }
6013 }
6014
6015 pr_err("Unimplemented Fileinfoclass :%d\n", req->FileInfoClass);
6016 return -EOPNOTSUPP;
6017 }
6018
6019 static int smb2_set_info_sec(struct ksmbd_file *fp, int addition_info,
6020 char *buffer, int buf_len)
6021 {
6022 struct smb_ntsd *pntsd = (struct smb_ntsd *)buffer;
6023
6024 fp->saccess |= FILE_SHARE_DELETE_LE;
6025
6026 return set_info_sec(fp->conn, fp->tcon, &fp->filp->f_path, pntsd,
6027 buf_len, false, true);
6028 }
6029
6030 /**
6031 * smb2_set_info() - handler for smb2 set info command handler
6032 * @work: smb work containing set info request buffer
6033 *
6034 * Return: 0 on success, otherwise error
6035 */
6036 int smb2_set_info(struct ksmbd_work *work)
6037 {
6038 struct smb2_set_info_req *req;
6039 struct smb2_set_info_rsp *rsp;
6040 struct ksmbd_file *fp = NULL;
6041 int rc = 0;
6042 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
6043
6044 ksmbd_debug(SMB, "Received set info request\n");
6045
6046 if (work->next_smb2_rcv_hdr_off) {
6047 req = ksmbd_req_buf_next(work);
6048 rsp = ksmbd_resp_buf_next(work);
6049 if (!has_file_id(req->VolatileFileId)) {
6050 ksmbd_debug(SMB, "Compound request set FID = %llu\n",
6051 work->compound_fid);
6052 id = work->compound_fid;
6053 pid = work->compound_pfid;
6054 }
6055 } else {
6056 req = smb2_get_msg(work->request_buf);
6057 rsp = smb2_get_msg(work->response_buf);
6058 }
6059
6060 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
6061 ksmbd_debug(SMB, "User does not have write permission\n");
6062 pr_err("User does not have write permission\n");
6063 rc = -EACCES;
6064 goto err_out;
6065 }
6066
6067 if (!has_file_id(id)) {
6068 id = req->VolatileFileId;
6069 pid = req->PersistentFileId;
6070 }
6071
6072 fp = ksmbd_lookup_fd_slow(work, id, pid);
6073 if (!fp) {
6074 ksmbd_debug(SMB, "Invalid id for close: %u\n", id);
6075 rc = -ENOENT;
6076 goto err_out;
6077 }
6078
6079 switch (req->InfoType) {
6080 case SMB2_O_INFO_FILE:
6081 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n");
6082 rc = smb2_set_info_file(work, fp, req, work->tcon->share_conf);
6083 break;
6084 case SMB2_O_INFO_SECURITY:
6085 ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n");
6086 if (ksmbd_override_fsids(work)) {
6087 rc = -ENOMEM;
6088 goto err_out;
6089 }
6090 rc = smb2_set_info_sec(fp,
6091 le32_to_cpu(req->AdditionalInformation),
6092 req->Buffer,
6093 le32_to_cpu(req->BufferLength));
6094 ksmbd_revert_fsids(work);
6095 break;
6096 default:
6097 rc = -EOPNOTSUPP;
6098 }
6099
6100 if (rc < 0)
6101 goto err_out;
6102
6103 rsp->StructureSize = cpu_to_le16(2);
6104 rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
6105 sizeof(struct smb2_set_info_rsp));
6106 if (rc)
6107 goto err_out;
6108 ksmbd_fd_put(work, fp);
6109 return 0;
6110
6111 err_out:
6112 if (rc == -EACCES || rc == -EPERM || rc == -EXDEV)
6113 rsp->hdr.Status = STATUS_ACCESS_DENIED;
6114 else if (rc == -EINVAL)
6115 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6116 else if (rc == -ESHARE)
6117 rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6118 else if (rc == -ENOENT)
6119 rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID;
6120 else if (rc == -EBUSY || rc == -ENOTEMPTY)
6121 rsp->hdr.Status = STATUS_DIRECTORY_NOT_EMPTY;
6122 else if (rc == -EAGAIN)
6123 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6124 else if (rc == -EBADF || rc == -ESTALE)
6125 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6126 else if (rc == -EEXIST)
6127 rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION;
6128 else if (rsp->hdr.Status == 0 || rc == -EOPNOTSUPP)
6129 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
6130 smb2_set_err_rsp(work);
6131 ksmbd_fd_put(work, fp);
6132 ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n", rc);
6133 return rc;
6134 }
6135
6136 /**
6137 * smb2_read_pipe() - handler for smb2 read from IPC pipe
6138 * @work: smb work containing read IPC pipe command buffer
6139 *
6140 * Return: 0 on success, otherwise error
6141 */
6142 static noinline int smb2_read_pipe(struct ksmbd_work *work)
6143 {
6144 int nbytes = 0, err;
6145 u64 id;
6146 struct ksmbd_rpc_command *rpc_resp;
6147 struct smb2_read_req *req;
6148 struct smb2_read_rsp *rsp;
6149
6150 WORK_BUFFERS(work, req, rsp);
6151
6152 id = req->VolatileFileId;
6153
6154 rpc_resp = ksmbd_rpc_read(work->sess, id);
6155 if (rpc_resp) {
6156 void *aux_payload_buf;
6157
6158 if (rpc_resp->flags != KSMBD_RPC_OK) {
6159 err = -EINVAL;
6160 goto out;
6161 }
6162
6163 aux_payload_buf =
6164 kvmalloc(rpc_resp->payload_sz, GFP_KERNEL);
6165 if (!aux_payload_buf) {
6166 err = -ENOMEM;
6167 goto out;
6168 }
6169
6170 memcpy(aux_payload_buf, rpc_resp->payload, rpc_resp->payload_sz);
6171
6172 nbytes = rpc_resp->payload_sz;
6173 err = ksmbd_iov_pin_rsp_read(work, (void *)rsp,
6174 offsetof(struct smb2_read_rsp, Buffer),
6175 aux_payload_buf, nbytes);
6176 if (err)
6177 goto out;
6178 kvfree(rpc_resp);
6179 } else {
6180 err = ksmbd_iov_pin_rsp(work, (void *)rsp,
6181 offsetof(struct smb2_read_rsp, Buffer));
6182 if (err)
6183 goto out;
6184 }
6185
6186 rsp->StructureSize = cpu_to_le16(17);
6187 rsp->DataOffset = 80;
6188 rsp->Reserved = 0;
6189 rsp->DataLength = cpu_to_le32(nbytes);
6190 rsp->DataRemaining = 0;
6191 rsp->Flags = 0;
6192 return 0;
6193
6194 out:
6195 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
6196 smb2_set_err_rsp(work);
6197 kvfree(rpc_resp);
6198 return err;
6199 }
6200
6201 static int smb2_set_remote_key_for_rdma(struct ksmbd_work *work,
6202 struct smb2_buffer_desc_v1 *desc,
6203 __le32 Channel,
6204 __le16 ChannelInfoLength)
6205 {
6206 unsigned int i, ch_count;
6207
6208 if (work->conn->dialect == SMB30_PROT_ID &&
6209 Channel != SMB2_CHANNEL_RDMA_V1)
6210 return -EINVAL;
6211
6212 ch_count = le16_to_cpu(ChannelInfoLength) / sizeof(*desc);
6213 if (ksmbd_debug_types & KSMBD_DEBUG_RDMA) {
6214 for (i = 0; i < ch_count; i++) {
6215 pr_info("RDMA r/w request %#x: token %#x, length %#x\n",
6216 i,
6217 le32_to_cpu(desc[i].token),
6218 le32_to_cpu(desc[i].length));
6219 }
6220 }
6221 if (!ch_count)
6222 return -EINVAL;
6223
6224 work->need_invalidate_rkey =
6225 (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE);
6226 if (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE)
6227 work->remote_key = le32_to_cpu(desc->token);
6228 return 0;
6229 }
6230
6231 static ssize_t smb2_read_rdma_channel(struct ksmbd_work *work,
6232 struct smb2_read_req *req, void *data_buf,
6233 size_t length)
6234 {
6235 int err;
6236
6237 err = ksmbd_conn_rdma_write(work->conn, data_buf, length,
6238 (struct smb2_buffer_desc_v1 *)
6239 ((char *)req + le16_to_cpu(req->ReadChannelInfoOffset)),
6240 le16_to_cpu(req->ReadChannelInfoLength));
6241 if (err)
6242 return err;
6243
6244 return length;
6245 }
6246
6247 /**
6248 * smb2_read() - handler for smb2 read from file
6249 * @work: smb work containing read command buffer
6250 *
6251 * Return: 0 on success, otherwise error
6252 */
6253 int smb2_read(struct ksmbd_work *work)
6254 {
6255 struct ksmbd_conn *conn = work->conn;
6256 struct smb2_read_req *req;
6257 struct smb2_read_rsp *rsp;
6258 struct ksmbd_file *fp = NULL;
6259 loff_t offset;
6260 size_t length, mincount;
6261 ssize_t nbytes = 0, remain_bytes = 0;
6262 int err = 0;
6263 bool is_rdma_channel = false;
6264 unsigned int max_read_size = conn->vals->max_read_size;
6265 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
6266 void *aux_payload_buf;
6267
6268 if (test_share_config_flag(work->tcon->share_conf,
6269 KSMBD_SHARE_FLAG_PIPE)) {
6270 ksmbd_debug(SMB, "IPC pipe read request\n");
6271 return smb2_read_pipe(work);
6272 }
6273
6274 if (work->next_smb2_rcv_hdr_off) {
6275 req = ksmbd_req_buf_next(work);
6276 rsp = ksmbd_resp_buf_next(work);
6277 if (!has_file_id(req->VolatileFileId)) {
6278 ksmbd_debug(SMB, "Compound request set FID = %llu\n",
6279 work->compound_fid);
6280 id = work->compound_fid;
6281 pid = work->compound_pfid;
6282 }
6283 } else {
6284 req = smb2_get_msg(work->request_buf);
6285 rsp = smb2_get_msg(work->response_buf);
6286 }
6287
6288 if (!has_file_id(id)) {
6289 id = req->VolatileFileId;
6290 pid = req->PersistentFileId;
6291 }
6292
6293 if (req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE ||
6294 req->Channel == SMB2_CHANNEL_RDMA_V1) {
6295 is_rdma_channel = true;
6296 max_read_size = get_smbd_max_read_write_size();
6297 }
6298
6299 if (is_rdma_channel == true) {
6300 unsigned int ch_offset = le16_to_cpu(req->ReadChannelInfoOffset);
6301
6302 if (ch_offset < offsetof(struct smb2_read_req, Buffer)) {
6303 err = -EINVAL;
6304 goto out;
6305 }
6306 err = smb2_set_remote_key_for_rdma(work,
6307 (struct smb2_buffer_desc_v1 *)
6308 ((char *)req + ch_offset),
6309 req->Channel,
6310 req->ReadChannelInfoLength);
6311 if (err)
6312 goto out;
6313 }
6314
6315 fp = ksmbd_lookup_fd_slow(work, id, pid);
6316 if (!fp) {
6317 err = -ENOENT;
6318 goto out;
6319 }
6320
6321 if (!(fp->daccess & (FILE_READ_DATA_LE | FILE_READ_ATTRIBUTES_LE))) {
6322 pr_err("Not permitted to read : 0x%x\n", fp->daccess);
6323 err = -EACCES;
6324 goto out;
6325 }
6326
6327 offset = le64_to_cpu(req->Offset);
6328 length = le32_to_cpu(req->Length);
6329 mincount = le32_to_cpu(req->MinimumCount);
6330
6331 if (length > max_read_size) {
6332 ksmbd_debug(SMB, "limiting read size to max size(%u)\n",
6333 max_read_size);
6334 err = -EINVAL;
6335 goto out;
6336 }
6337
6338 ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n",
6339 fp->filp, offset, length);
6340
6341 aux_payload_buf = kvzalloc(length, GFP_KERNEL);
6342 if (!aux_payload_buf) {
6343 err = -ENOMEM;
6344 goto out;
6345 }
6346
6347 nbytes = ksmbd_vfs_read(work, fp, length, &offset, aux_payload_buf);
6348 if (nbytes < 0) {
6349 err = nbytes;
6350 goto out;
6351 }
6352
6353 if ((nbytes == 0 && length != 0) || nbytes < mincount) {
6354 kvfree(aux_payload_buf);
6355 rsp->hdr.Status = STATUS_END_OF_FILE;
6356 smb2_set_err_rsp(work);
6357 ksmbd_fd_put(work, fp);
6358 return 0;
6359 }
6360
6361 ksmbd_debug(SMB, "nbytes %zu, offset %lld mincount %zu\n",
6362 nbytes, offset, mincount);
6363
6364 if (is_rdma_channel == true) {
6365 /* write data to the client using rdma channel */
6366 remain_bytes = smb2_read_rdma_channel(work, req,
6367 aux_payload_buf,
6368 nbytes);
6369 kvfree(aux_payload_buf);
6370 aux_payload_buf = NULL;
6371 nbytes = 0;
6372 if (remain_bytes < 0) {
6373 err = (int)remain_bytes;
6374 goto out;
6375 }
6376 }
6377
6378 rsp->StructureSize = cpu_to_le16(17);
6379 rsp->DataOffset = 80;
6380 rsp->Reserved = 0;
6381 rsp->DataLength = cpu_to_le32(nbytes);
6382 rsp->DataRemaining = cpu_to_le32(remain_bytes);
6383 rsp->Flags = 0;
6384 err = ksmbd_iov_pin_rsp_read(work, (void *)rsp,
6385 offsetof(struct smb2_read_rsp, Buffer),
6386 aux_payload_buf, nbytes);
6387 if (err)
6388 goto out;
6389 ksmbd_fd_put(work, fp);
6390 return 0;
6391
6392 out:
6393 if (err) {
6394 if (err == -EISDIR)
6395 rsp->hdr.Status = STATUS_INVALID_DEVICE_REQUEST;
6396 else if (err == -EAGAIN)
6397 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6398 else if (err == -ENOENT)
6399 rsp->hdr.Status = STATUS_FILE_CLOSED;
6400 else if (err == -EACCES)
6401 rsp->hdr.Status = STATUS_ACCESS_DENIED;
6402 else if (err == -ESHARE)
6403 rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6404 else if (err == -EINVAL)
6405 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6406 else
6407 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6408
6409 smb2_set_err_rsp(work);
6410 }
6411 ksmbd_fd_put(work, fp);
6412 return err;
6413 }
6414
6415 /**
6416 * smb2_write_pipe() - handler for smb2 write on IPC pipe
6417 * @work: smb work containing write IPC pipe command buffer
6418 *
6419 * Return: 0 on success, otherwise error
6420 */
6421 static noinline int smb2_write_pipe(struct ksmbd_work *work)
6422 {
6423 struct smb2_write_req *req;
6424 struct smb2_write_rsp *rsp;
6425 struct ksmbd_rpc_command *rpc_resp;
6426 u64 id = 0;
6427 int err = 0, ret = 0;
6428 char *data_buf;
6429 size_t length;
6430
6431 WORK_BUFFERS(work, req, rsp);
6432
6433 length = le32_to_cpu(req->Length);
6434 id = req->VolatileFileId;
6435
6436 if ((u64)le16_to_cpu(req->DataOffset) + length >
6437 get_rfc1002_len(work->request_buf)) {
6438 pr_err("invalid write data offset %u, smb_len %u\n",
6439 le16_to_cpu(req->DataOffset),
6440 get_rfc1002_len(work->request_buf));
6441 err = -EINVAL;
6442 goto out;
6443 }
6444
6445 data_buf = (char *)(((char *)&req->hdr.ProtocolId) +
6446 le16_to_cpu(req->DataOffset));
6447
6448 rpc_resp = ksmbd_rpc_write(work->sess, id, data_buf, length);
6449 if (rpc_resp) {
6450 if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) {
6451 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
6452 kvfree(rpc_resp);
6453 smb2_set_err_rsp(work);
6454 return -EOPNOTSUPP;
6455 }
6456 if (rpc_resp->flags != KSMBD_RPC_OK) {
6457 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6458 smb2_set_err_rsp(work);
6459 kvfree(rpc_resp);
6460 return ret;
6461 }
6462 kvfree(rpc_resp);
6463 }
6464
6465 rsp->StructureSize = cpu_to_le16(17);
6466 rsp->DataOffset = 0;
6467 rsp->Reserved = 0;
6468 rsp->DataLength = cpu_to_le32(length);
6469 rsp->DataRemaining = 0;
6470 rsp->Reserved2 = 0;
6471 err = ksmbd_iov_pin_rsp(work, (void *)rsp,
6472 offsetof(struct smb2_write_rsp, Buffer));
6473 out:
6474 if (err) {
6475 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6476 smb2_set_err_rsp(work);
6477 }
6478
6479 return err;
6480 }
6481
6482 static ssize_t smb2_write_rdma_channel(struct ksmbd_work *work,
6483 struct smb2_write_req *req,
6484 struct ksmbd_file *fp,
6485 loff_t offset, size_t length, bool sync)
6486 {
6487 char *data_buf;
6488 int ret;
6489 ssize_t nbytes;
6490
6491 data_buf = kvzalloc(length, GFP_KERNEL);
6492 if (!data_buf)
6493 return -ENOMEM;
6494
6495 ret = ksmbd_conn_rdma_read(work->conn, data_buf, length,
6496 (struct smb2_buffer_desc_v1 *)
6497 ((char *)req + le16_to_cpu(req->WriteChannelInfoOffset)),
6498 le16_to_cpu(req->WriteChannelInfoLength));
6499 if (ret < 0) {
6500 kvfree(data_buf);
6501 return ret;
6502 }
6503
6504 ret = ksmbd_vfs_write(work, fp, data_buf, length, &offset, sync, &nbytes);
6505 kvfree(data_buf);
6506 if (ret < 0)
6507 return ret;
6508
6509 return nbytes;
6510 }
6511
6512 /**
6513 * smb2_write() - handler for smb2 write from file
6514 * @work: smb work containing write command buffer
6515 *
6516 * Return: 0 on success, otherwise error
6517 */
6518 int smb2_write(struct ksmbd_work *work)
6519 {
6520 struct smb2_write_req *req;
6521 struct smb2_write_rsp *rsp;
6522 struct ksmbd_file *fp = NULL;
6523 loff_t offset;
6524 size_t length;
6525 ssize_t nbytes;
6526 char *data_buf;
6527 bool writethrough = false, is_rdma_channel = false;
6528 int err = 0;
6529 unsigned int max_write_size = work->conn->vals->max_write_size;
6530
6531 WORK_BUFFERS(work, req, rsp);
6532
6533 if (test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_PIPE)) {
6534 ksmbd_debug(SMB, "IPC pipe write request\n");
6535 return smb2_write_pipe(work);
6536 }
6537
6538 offset = le64_to_cpu(req->Offset);
6539 length = le32_to_cpu(req->Length);
6540
6541 if (req->Channel == SMB2_CHANNEL_RDMA_V1 ||
6542 req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE) {
6543 is_rdma_channel = true;
6544 max_write_size = get_smbd_max_read_write_size();
6545 length = le32_to_cpu(req->RemainingBytes);
6546 }
6547
6548 if (is_rdma_channel == true) {
6549 unsigned int ch_offset = le16_to_cpu(req->WriteChannelInfoOffset);
6550
6551 if (req->Length != 0 || req->DataOffset != 0 ||
6552 ch_offset < offsetof(struct smb2_write_req, Buffer)) {
6553 err = -EINVAL;
6554 goto out;
6555 }
6556 err = smb2_set_remote_key_for_rdma(work,
6557 (struct smb2_buffer_desc_v1 *)
6558 ((char *)req + ch_offset),
6559 req->Channel,
6560 req->WriteChannelInfoLength);
6561 if (err)
6562 goto out;
6563 }
6564
6565 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
6566 ksmbd_debug(SMB, "User does not have write permission\n");
6567 err = -EACCES;
6568 goto out;
6569 }
6570
6571 fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
6572 if (!fp) {
6573 err = -ENOENT;
6574 goto out;
6575 }
6576
6577 if (!(fp->daccess & (FILE_WRITE_DATA_LE | FILE_READ_ATTRIBUTES_LE))) {
6578 pr_err("Not permitted to write : 0x%x\n", fp->daccess);
6579 err = -EACCES;
6580 goto out;
6581 }
6582
6583 if (length > max_write_size) {
6584 ksmbd_debug(SMB, "limiting write size to max size(%u)\n",
6585 max_write_size);
6586 err = -EINVAL;
6587 goto out;
6588 }
6589
6590 ksmbd_debug(SMB, "flags %u\n", le32_to_cpu(req->Flags));
6591 if (le32_to_cpu(req->Flags) & SMB2_WRITEFLAG_WRITE_THROUGH)
6592 writethrough = true;
6593
6594 if (is_rdma_channel == false) {
6595 if (le16_to_cpu(req->DataOffset) <
6596 offsetof(struct smb2_write_req, Buffer)) {
6597 err = -EINVAL;
6598 goto out;
6599 }
6600
6601 data_buf = (char *)(((char *)&req->hdr.ProtocolId) +
6602 le16_to_cpu(req->DataOffset));
6603
6604 ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n",
6605 fp->filp, offset, length);
6606 err = ksmbd_vfs_write(work, fp, data_buf, length, &offset,
6607 writethrough, &nbytes);
6608 if (err < 0)
6609 goto out;
6610 } else {
6611 /* read data from the client using rdma channel, and
6612 * write the data.
6613 */
6614 nbytes = smb2_write_rdma_channel(work, req, fp, offset, length,
6615 writethrough);
6616 if (nbytes < 0) {
6617 err = (int)nbytes;
6618 goto out;
6619 }
6620 }
6621
6622 rsp->StructureSize = cpu_to_le16(17);
6623 rsp->DataOffset = 0;
6624 rsp->Reserved = 0;
6625 rsp->DataLength = cpu_to_le32(nbytes);
6626 rsp->DataRemaining = 0;
6627 rsp->Reserved2 = 0;
6628 err = ksmbd_iov_pin_rsp(work, rsp, offsetof(struct smb2_write_rsp, Buffer));
6629 if (err)
6630 goto out;
6631 ksmbd_fd_put(work, fp);
6632 return 0;
6633
6634 out:
6635 if (err == -EAGAIN)
6636 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6637 else if (err == -ENOSPC || err == -EFBIG)
6638 rsp->hdr.Status = STATUS_DISK_FULL;
6639 else if (err == -ENOENT)
6640 rsp->hdr.Status = STATUS_FILE_CLOSED;
6641 else if (err == -EACCES)
6642 rsp->hdr.Status = STATUS_ACCESS_DENIED;
6643 else if (err == -ESHARE)
6644 rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6645 else if (err == -EINVAL)
6646 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6647 else
6648 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6649
6650 smb2_set_err_rsp(work);
6651 ksmbd_fd_put(work, fp);
6652 return err;
6653 }
6654
6655 /**
6656 * smb2_flush() - handler for smb2 flush file - fsync
6657 * @work: smb work containing flush command buffer
6658 *
6659 * Return: 0 on success, otherwise error
6660 */
6661 int smb2_flush(struct ksmbd_work *work)
6662 {
6663 struct smb2_flush_req *req;
6664 struct smb2_flush_rsp *rsp;
6665 int err;
6666
6667 WORK_BUFFERS(work, req, rsp);
6668
6669 ksmbd_debug(SMB, "SMB2_FLUSH called for fid %llu\n", req->VolatileFileId);
6670
6671 err = ksmbd_vfs_fsync(work, req->VolatileFileId, req->PersistentFileId);
6672 if (err)
6673 goto out;
6674
6675 rsp->StructureSize = cpu_to_le16(4);
6676 rsp->Reserved = 0;
6677 return ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_flush_rsp));
6678
6679 out:
6680 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6681 smb2_set_err_rsp(work);
6682 return err;
6683 }
6684
6685 /**
6686 * smb2_cancel() - handler for smb2 cancel command
6687 * @work: smb work containing cancel command buffer
6688 *
6689 * Return: 0 on success, otherwise error
6690 */
6691 int smb2_cancel(struct ksmbd_work *work)
6692 {
6693 struct ksmbd_conn *conn = work->conn;
6694 struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
6695 struct smb2_hdr *chdr;
6696 struct ksmbd_work *iter;
6697 struct list_head *command_list;
6698
6699 if (work->next_smb2_rcv_hdr_off)
6700 hdr = ksmbd_resp_buf_next(work);
6701
6702 ksmbd_debug(SMB, "smb2 cancel called on mid %llu, async flags 0x%x\n",
6703 hdr->MessageId, hdr->Flags);
6704
6705 if (hdr->Flags & SMB2_FLAGS_ASYNC_COMMAND) {
6706 command_list = &conn->async_requests;
6707
6708 spin_lock(&conn->request_lock);
6709 list_for_each_entry(iter, command_list,
6710 async_request_entry) {
6711 chdr = smb2_get_msg(iter->request_buf);
6712
6713 if (iter->async_id !=
6714 le64_to_cpu(hdr->Id.AsyncId))
6715 continue;
6716
6717 ksmbd_debug(SMB,
6718 "smb2 with AsyncId %llu cancelled command = 0x%x\n",
6719 le64_to_cpu(hdr->Id.AsyncId),
6720 le16_to_cpu(chdr->Command));
6721 iter->state = KSMBD_WORK_CANCELLED;
6722 if (iter->cancel_fn)
6723 iter->cancel_fn(iter->cancel_argv);
6724 break;
6725 }
6726 spin_unlock(&conn->request_lock);
6727 } else {
6728 command_list = &conn->requests;
6729
6730 spin_lock(&conn->request_lock);
6731 list_for_each_entry(iter, command_list, request_entry) {
6732 chdr = smb2_get_msg(iter->request_buf);
6733
6734 if (chdr->MessageId != hdr->MessageId ||
6735 iter == work)
6736 continue;
6737
6738 ksmbd_debug(SMB,
6739 "smb2 with mid %llu cancelled command = 0x%x\n",
6740 le64_to_cpu(hdr->MessageId),
6741 le16_to_cpu(chdr->Command));
6742 iter->state = KSMBD_WORK_CANCELLED;
6743 break;
6744 }
6745 spin_unlock(&conn->request_lock);
6746 }
6747
6748 /* For SMB2_CANCEL command itself send no response*/
6749 work->send_no_response = 1;
6750 return 0;
6751 }
6752
6753 struct file_lock *smb_flock_init(struct file *f)
6754 {
6755 struct file_lock *fl;
6756
6757 fl = locks_alloc_lock();
6758 if (!fl)
6759 goto out;
6760
6761 locks_init_lock(fl);
6762
6763 fl->c.flc_owner = f;
6764 fl->c.flc_pid = current->tgid;
6765 fl->c.flc_file = f;
6766 fl->c.flc_flags = FL_POSIX;
6767 fl->fl_ops = NULL;
6768 fl->fl_lmops = NULL;
6769
6770 out:
6771 return fl;
6772 }
6773
6774 static int smb2_set_flock_flags(struct file_lock *flock, int flags)
6775 {
6776 int cmd = -EINVAL;
6777
6778 /* Checking for wrong flag combination during lock request*/
6779 switch (flags) {
6780 case SMB2_LOCKFLAG_SHARED:
6781 ksmbd_debug(SMB, "received shared request\n");
6782 cmd = F_SETLKW;
6783 flock->c.flc_type = F_RDLCK;
6784 flock->c.flc_flags |= FL_SLEEP;
6785 break;
6786 case SMB2_LOCKFLAG_EXCLUSIVE:
6787 ksmbd_debug(SMB, "received exclusive request\n");
6788 cmd = F_SETLKW;
6789 flock->c.flc_type = F_WRLCK;
6790 flock->c.flc_flags |= FL_SLEEP;
6791 break;
6792 case SMB2_LOCKFLAG_SHARED | SMB2_LOCKFLAG_FAIL_IMMEDIATELY:
6793 ksmbd_debug(SMB,
6794 "received shared & fail immediately request\n");
6795 cmd = F_SETLK;
6796 flock->c.flc_type = F_RDLCK;
6797 break;
6798 case SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_FAIL_IMMEDIATELY:
6799 ksmbd_debug(SMB,
6800 "received exclusive & fail immediately request\n");
6801 cmd = F_SETLK;
6802 flock->c.flc_type = F_WRLCK;
6803 break;
6804 case SMB2_LOCKFLAG_UNLOCK:
6805 ksmbd_debug(SMB, "received unlock request\n");
6806 flock->c.flc_type = F_UNLCK;
6807 cmd = F_SETLK;
6808 break;
6809 }
6810
6811 return cmd;
6812 }
6813
6814 static struct ksmbd_lock *smb2_lock_init(struct file_lock *flock,
6815 unsigned int cmd, int flags,
6816 struct list_head *lock_list)
6817 {
6818 struct ksmbd_lock *lock;
6819
6820 lock = kzalloc(sizeof(struct ksmbd_lock), GFP_KERNEL);
6821 if (!lock)
6822 return NULL;
6823
6824 lock->cmd = cmd;
6825 lock->fl = flock;
6826 lock->start = flock->fl_start;
6827 lock->end = flock->fl_end;
6828 lock->flags = flags;
6829 if (lock->start == lock->end)
6830 lock->zero_len = 1;
6831 INIT_LIST_HEAD(&lock->clist);
6832 INIT_LIST_HEAD(&lock->flist);
6833 INIT_LIST_HEAD(&lock->llist);
6834 list_add_tail(&lock->llist, lock_list);
6835
6836 return lock;
6837 }
6838
6839 static void smb2_remove_blocked_lock(void **argv)
6840 {
6841 struct file_lock *flock = (struct file_lock *)argv[0];
6842
6843 ksmbd_vfs_posix_lock_unblock(flock);
6844 locks_wake_up(flock);
6845 }
6846
6847 static inline bool lock_defer_pending(struct file_lock *fl)
6848 {
6849 /* check pending lock waiters */
6850 return waitqueue_active(&fl->c.flc_wait);
6851 }
6852
6853 /**
6854 * smb2_lock() - handler for smb2 file lock command
6855 * @work: smb work containing lock command buffer
6856 *
6857 * Return: 0 on success, otherwise error
6858 */
6859 int smb2_lock(struct ksmbd_work *work)
6860 {
6861 struct smb2_lock_req *req;
6862 struct smb2_lock_rsp *rsp;
6863 struct smb2_lock_element *lock_ele;
6864 struct ksmbd_file *fp = NULL;
6865 struct file_lock *flock = NULL;
6866 struct file *filp = NULL;
6867 int lock_count;
6868 int flags = 0;
6869 int cmd = 0;
6870 int err = -EIO, i, rc = 0;
6871 u64 lock_start, lock_length;
6872 struct ksmbd_lock *smb_lock = NULL, *cmp_lock, *tmp, *tmp2;
6873 struct ksmbd_conn *conn;
6874 int nolock = 0;
6875 LIST_HEAD(lock_list);
6876 LIST_HEAD(rollback_list);
6877 int prior_lock = 0;
6878
6879 WORK_BUFFERS(work, req, rsp);
6880
6881 ksmbd_debug(SMB, "Received lock request\n");
6882 fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
6883 if (!fp) {
6884 ksmbd_debug(SMB, "Invalid file id for lock : %llu\n", req->VolatileFileId);
6885 err = -ENOENT;
6886 goto out2;
6887 }
6888
6889 filp = fp->filp;
6890 lock_count = le16_to_cpu(req->LockCount);
6891 lock_ele = req->locks;
6892
6893 ksmbd_debug(SMB, "lock count is %d\n", lock_count);
6894 if (!lock_count) {
6895 err = -EINVAL;
6896 goto out2;
6897 }
6898
6899 for (i = 0; i < lock_count; i++) {
6900 flags = le32_to_cpu(lock_ele[i].Flags);
6901
6902 flock = smb_flock_init(filp);
6903 if (!flock)
6904 goto out;
6905
6906 cmd = smb2_set_flock_flags(flock, flags);
6907
6908 lock_start = le64_to_cpu(lock_ele[i].Offset);
6909 lock_length = le64_to_cpu(lock_ele[i].Length);
6910 if (lock_start > U64_MAX - lock_length) {
6911 pr_err("Invalid lock range requested\n");
6912 rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE;
6913 locks_free_lock(flock);
6914 goto out;
6915 }
6916
6917 if (lock_start > OFFSET_MAX)
6918 flock->fl_start = OFFSET_MAX;
6919 else
6920 flock->fl_start = lock_start;
6921
6922 lock_length = le64_to_cpu(lock_ele[i].Length);
6923 if (lock_length > OFFSET_MAX - flock->fl_start)
6924 lock_length = OFFSET_MAX - flock->fl_start;
6925
6926 flock->fl_end = flock->fl_start + lock_length;
6927
6928 if (flock->fl_end < flock->fl_start) {
6929 ksmbd_debug(SMB,
6930 "the end offset(%llx) is smaller than the start offset(%llx)\n",
6931 flock->fl_end, flock->fl_start);
6932 rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE;
6933 locks_free_lock(flock);
6934 goto out;
6935 }
6936
6937 /* Check conflict locks in one request */
6938 list_for_each_entry(cmp_lock, &lock_list, llist) {
6939 if (cmp_lock->fl->fl_start <= flock->fl_start &&
6940 cmp_lock->fl->fl_end >= flock->fl_end) {
6941 if (cmp_lock->fl->c.flc_type != F_UNLCK &&
6942 flock->c.flc_type != F_UNLCK) {
6943 pr_err("conflict two locks in one request\n");
6944 err = -EINVAL;
6945 locks_free_lock(flock);
6946 goto out;
6947 }
6948 }
6949 }
6950
6951 smb_lock = smb2_lock_init(flock, cmd, flags, &lock_list);
6952 if (!smb_lock) {
6953 err = -EINVAL;
6954 locks_free_lock(flock);
6955 goto out;
6956 }
6957 }
6958
6959 list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) {
6960 if (smb_lock->cmd < 0) {
6961 err = -EINVAL;
6962 goto out;
6963 }
6964
6965 if (!(smb_lock->flags & SMB2_LOCKFLAG_MASK)) {
6966 err = -EINVAL;
6967 goto out;
6968 }
6969
6970 if ((prior_lock & (SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_SHARED) &&
6971 smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) ||
6972 (prior_lock == SMB2_LOCKFLAG_UNLOCK &&
6973 !(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK))) {
6974 err = -EINVAL;
6975 goto out;
6976 }
6977
6978 prior_lock = smb_lock->flags;
6979
6980 if (!(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) &&
6981 !(smb_lock->flags & SMB2_LOCKFLAG_FAIL_IMMEDIATELY))
6982 goto no_check_cl;
6983
6984 nolock = 1;
6985 /* check locks in connection list */
6986 down_read(&conn_list_lock);
6987 list_for_each_entry(conn, &conn_list, conns_list) {
6988 spin_lock(&conn->llist_lock);
6989 list_for_each_entry_safe(cmp_lock, tmp2, &conn->lock_list, clist) {
6990 if (file_inode(cmp_lock->fl->c.flc_file) !=
6991 file_inode(smb_lock->fl->c.flc_file))
6992 continue;
6993
6994 if (lock_is_unlock(smb_lock->fl)) {
6995 if (cmp_lock->fl->c.flc_file == smb_lock->fl->c.flc_file &&
6996 cmp_lock->start == smb_lock->start &&
6997 cmp_lock->end == smb_lock->end &&
6998 !lock_defer_pending(cmp_lock->fl)) {
6999 nolock = 0;
7000 list_del(&cmp_lock->flist);
7001 list_del(&cmp_lock->clist);
7002 spin_unlock(&conn->llist_lock);
7003 up_read(&conn_list_lock);
7004
7005 locks_free_lock(cmp_lock->fl);
7006 kfree(cmp_lock);
7007 goto out_check_cl;
7008 }
7009 continue;
7010 }
7011
7012 if (cmp_lock->fl->c.flc_file == smb_lock->fl->c.flc_file) {
7013 if (smb_lock->flags & SMB2_LOCKFLAG_SHARED)
7014 continue;
7015 } else {
7016 if (cmp_lock->flags & SMB2_LOCKFLAG_SHARED)
7017 continue;
7018 }
7019
7020 /* check zero byte lock range */
7021 if (cmp_lock->zero_len && !smb_lock->zero_len &&
7022 cmp_lock->start > smb_lock->start &&
7023 cmp_lock->start < smb_lock->end) {
7024 spin_unlock(&conn->llist_lock);
7025 up_read(&conn_list_lock);
7026 pr_err("previous lock conflict with zero byte lock range\n");
7027 goto out;
7028 }
7029
7030 if (smb_lock->zero_len && !cmp_lock->zero_len &&
7031 smb_lock->start > cmp_lock->start &&
7032 smb_lock->start < cmp_lock->end) {
7033 spin_unlock(&conn->llist_lock);
7034 up_read(&conn_list_lock);
7035 pr_err("current lock conflict with zero byte lock range\n");
7036 goto out;
7037 }
7038
7039 if (((cmp_lock->start <= smb_lock->start &&
7040 cmp_lock->end > smb_lock->start) ||
7041 (cmp_lock->start < smb_lock->end &&
7042 cmp_lock->end >= smb_lock->end)) &&
7043 !cmp_lock->zero_len && !smb_lock->zero_len) {
7044 spin_unlock(&conn->llist_lock);
7045 up_read(&conn_list_lock);
7046 pr_err("Not allow lock operation on exclusive lock range\n");
7047 goto out;
7048 }
7049 }
7050 spin_unlock(&conn->llist_lock);
7051 }
7052 up_read(&conn_list_lock);
7053 out_check_cl:
7054 if (lock_is_unlock(smb_lock->fl) && nolock) {
7055 pr_err("Try to unlock nolocked range\n");
7056 rsp->hdr.Status = STATUS_RANGE_NOT_LOCKED;
7057 goto out;
7058 }
7059
7060 no_check_cl:
7061 if (smb_lock->zero_len) {
7062 err = 0;
7063 goto skip;
7064 }
7065
7066 flock = smb_lock->fl;
7067 list_del(&smb_lock->llist);
7068 retry:
7069 rc = vfs_lock_file(filp, smb_lock->cmd, flock, NULL);
7070 skip:
7071 if (flags & SMB2_LOCKFLAG_UNLOCK) {
7072 if (!rc) {
7073 ksmbd_debug(SMB, "File unlocked\n");
7074 } else if (rc == -ENOENT) {
7075 rsp->hdr.Status = STATUS_NOT_LOCKED;
7076 goto out;
7077 }
7078 locks_free_lock(flock);
7079 kfree(smb_lock);
7080 } else {
7081 if (rc == FILE_LOCK_DEFERRED) {
7082 void **argv;
7083
7084 ksmbd_debug(SMB,
7085 "would have to wait for getting lock\n");
7086 list_add(&smb_lock->llist, &rollback_list);
7087
7088 argv = kmalloc(sizeof(void *), GFP_KERNEL);
7089 if (!argv) {
7090 err = -ENOMEM;
7091 goto out;
7092 }
7093 argv[0] = flock;
7094
7095 rc = setup_async_work(work,
7096 smb2_remove_blocked_lock,
7097 argv);
7098 if (rc) {
7099 kfree(argv);
7100 err = -ENOMEM;
7101 goto out;
7102 }
7103 spin_lock(&fp->f_lock);
7104 list_add(&work->fp_entry, &fp->blocked_works);
7105 spin_unlock(&fp->f_lock);
7106
7107 smb2_send_interim_resp(work, STATUS_PENDING);
7108
7109 ksmbd_vfs_posix_lock_wait(flock);
7110
7111 spin_lock(&fp->f_lock);
7112 list_del(&work->fp_entry);
7113 spin_unlock(&fp->f_lock);
7114
7115 if (work->state != KSMBD_WORK_ACTIVE) {
7116 list_del(&smb_lock->llist);
7117 locks_free_lock(flock);
7118
7119 if (work->state == KSMBD_WORK_CANCELLED) {
7120 rsp->hdr.Status =
7121 STATUS_CANCELLED;
7122 kfree(smb_lock);
7123 smb2_send_interim_resp(work,
7124 STATUS_CANCELLED);
7125 work->send_no_response = 1;
7126 goto out;
7127 }
7128
7129 rsp->hdr.Status =
7130 STATUS_RANGE_NOT_LOCKED;
7131 kfree(smb_lock);
7132 goto out2;
7133 }
7134
7135 list_del(&smb_lock->llist);
7136 release_async_work(work);
7137 goto retry;
7138 } else if (!rc) {
7139 list_add(&smb_lock->llist, &rollback_list);
7140 spin_lock(&work->conn->llist_lock);
7141 list_add_tail(&smb_lock->clist,
7142 &work->conn->lock_list);
7143 list_add_tail(&smb_lock->flist,
7144 &fp->lock_list);
7145 spin_unlock(&work->conn->llist_lock);
7146 ksmbd_debug(SMB, "successful in taking lock\n");
7147 } else {
7148 goto out;
7149 }
7150 }
7151 }
7152
7153 if (atomic_read(&fp->f_ci->op_count) > 1)
7154 smb_break_all_oplock(work, fp);
7155
7156 rsp->StructureSize = cpu_to_le16(4);
7157 ksmbd_debug(SMB, "successful in taking lock\n");
7158 rsp->hdr.Status = STATUS_SUCCESS;
7159 rsp->Reserved = 0;
7160 err = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_lock_rsp));
7161 if (err)
7162 goto out;
7163
7164 ksmbd_fd_put(work, fp);
7165 return 0;
7166
7167 out:
7168 list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) {
7169 locks_free_lock(smb_lock->fl);
7170 list_del(&smb_lock->llist);
7171 kfree(smb_lock);
7172 }
7173
7174 list_for_each_entry_safe(smb_lock, tmp, &rollback_list, llist) {
7175 struct file_lock *rlock = NULL;
7176
7177 rlock = smb_flock_init(filp);
7178 rlock->c.flc_type = F_UNLCK;
7179 rlock->fl_start = smb_lock->start;
7180 rlock->fl_end = smb_lock->end;
7181
7182 rc = vfs_lock_file(filp, F_SETLK, rlock, NULL);
7183 if (rc)
7184 pr_err("rollback unlock fail : %d\n", rc);
7185
7186 list_del(&smb_lock->llist);
7187 spin_lock(&work->conn->llist_lock);
7188 if (!list_empty(&smb_lock->flist))
7189 list_del(&smb_lock->flist);
7190 list_del(&smb_lock->clist);
7191 spin_unlock(&work->conn->llist_lock);
7192
7193 locks_free_lock(smb_lock->fl);
7194 locks_free_lock(rlock);
7195 kfree(smb_lock);
7196 }
7197 out2:
7198 ksmbd_debug(SMB, "failed in taking lock(flags : %x), err : %d\n", flags, err);
7199
7200 if (!rsp->hdr.Status) {
7201 if (err == -EINVAL)
7202 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7203 else if (err == -ENOMEM)
7204 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
7205 else if (err == -ENOENT)
7206 rsp->hdr.Status = STATUS_FILE_CLOSED;
7207 else
7208 rsp->hdr.Status = STATUS_LOCK_NOT_GRANTED;
7209 }
7210
7211 smb2_set_err_rsp(work);
7212 ksmbd_fd_put(work, fp);
7213 return err;
7214 }
7215
7216 static int fsctl_copychunk(struct ksmbd_work *work,
7217 struct copychunk_ioctl_req *ci_req,
7218 unsigned int cnt_code,
7219 unsigned int input_count,
7220 unsigned long long volatile_id,
7221 unsigned long long persistent_id,
7222 struct smb2_ioctl_rsp *rsp)
7223 {
7224 struct copychunk_ioctl_rsp *ci_rsp;
7225 struct ksmbd_file *src_fp = NULL, *dst_fp = NULL;
7226 struct srv_copychunk *chunks;
7227 unsigned int i, chunk_count, chunk_count_written = 0;
7228 unsigned int chunk_size_written = 0;
7229 loff_t total_size_written = 0;
7230 int ret = 0;
7231
7232 ci_rsp = (struct copychunk_ioctl_rsp *)&rsp->Buffer[0];
7233
7234 rsp->VolatileFileId = volatile_id;
7235 rsp->PersistentFileId = persistent_id;
7236 ci_rsp->ChunksWritten =
7237 cpu_to_le32(ksmbd_server_side_copy_max_chunk_count());
7238 ci_rsp->ChunkBytesWritten =
7239 cpu_to_le32(ksmbd_server_side_copy_max_chunk_size());
7240 ci_rsp->TotalBytesWritten =
7241 cpu_to_le32(ksmbd_server_side_copy_max_total_size());
7242
7243 chunks = (struct srv_copychunk *)&ci_req->Chunks[0];
7244 chunk_count = le32_to_cpu(ci_req->ChunkCount);
7245 if (chunk_count == 0)
7246 goto out;
7247 total_size_written = 0;
7248
7249 /* verify the SRV_COPYCHUNK_COPY packet */
7250 if (chunk_count > ksmbd_server_side_copy_max_chunk_count() ||
7251 input_count < offsetof(struct copychunk_ioctl_req, Chunks) +
7252 chunk_count * sizeof(struct srv_copychunk)) {
7253 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7254 return -EINVAL;
7255 }
7256
7257 for (i = 0; i < chunk_count; i++) {
7258 if (le32_to_cpu(chunks[i].Length) == 0 ||
7259 le32_to_cpu(chunks[i].Length) > ksmbd_server_side_copy_max_chunk_size())
7260 break;
7261 total_size_written += le32_to_cpu(chunks[i].Length);
7262 }
7263
7264 if (i < chunk_count ||
7265 total_size_written > ksmbd_server_side_copy_max_total_size()) {
7266 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7267 return -EINVAL;
7268 }
7269
7270 src_fp = ksmbd_lookup_foreign_fd(work,
7271 le64_to_cpu(ci_req->ResumeKey[0]));
7272 dst_fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id);
7273 ret = -EINVAL;
7274 if (!src_fp ||
7275 src_fp->persistent_id != le64_to_cpu(ci_req->ResumeKey[1])) {
7276 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
7277 goto out;
7278 }
7279
7280 if (!dst_fp) {
7281 rsp->hdr.Status = STATUS_FILE_CLOSED;
7282 goto out;
7283 }
7284
7285 /*
7286 * FILE_READ_DATA should only be included in
7287 * the FSCTL_COPYCHUNK case
7288 */
7289 if (cnt_code == FSCTL_COPYCHUNK &&
7290 !(dst_fp->daccess & (FILE_READ_DATA_LE | FILE_GENERIC_READ_LE))) {
7291 rsp->hdr.Status = STATUS_ACCESS_DENIED;
7292 goto out;
7293 }
7294
7295 ret = ksmbd_vfs_copy_file_ranges(work, src_fp, dst_fp,
7296 chunks, chunk_count,
7297 &chunk_count_written,
7298 &chunk_size_written,
7299 &total_size_written);
7300 if (ret < 0) {
7301 if (ret == -EACCES)
7302 rsp->hdr.Status = STATUS_ACCESS_DENIED;
7303 if (ret == -EAGAIN)
7304 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
7305 else if (ret == -EBADF)
7306 rsp->hdr.Status = STATUS_INVALID_HANDLE;
7307 else if (ret == -EFBIG || ret == -ENOSPC)
7308 rsp->hdr.Status = STATUS_DISK_FULL;
7309 else if (ret == -EINVAL)
7310 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7311 else if (ret == -EISDIR)
7312 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
7313 else if (ret == -E2BIG)
7314 rsp->hdr.Status = STATUS_INVALID_VIEW_SIZE;
7315 else
7316 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
7317 }
7318
7319 ci_rsp->ChunksWritten = cpu_to_le32(chunk_count_written);
7320 ci_rsp->ChunkBytesWritten = cpu_to_le32(chunk_size_written);
7321 ci_rsp->TotalBytesWritten = cpu_to_le32(total_size_written);
7322 out:
7323 ksmbd_fd_put(work, src_fp);
7324 ksmbd_fd_put(work, dst_fp);
7325 return ret;
7326 }
7327
7328 static __be32 idev_ipv4_address(struct in_device *idev)
7329 {
7330 __be32 addr = 0;
7331
7332 struct in_ifaddr *ifa;
7333
7334 rcu_read_lock();
7335 in_dev_for_each_ifa_rcu(ifa, idev) {
7336 if (ifa->ifa_flags & IFA_F_SECONDARY)
7337 continue;
7338
7339 addr = ifa->ifa_address;
7340 break;
7341 }
7342 rcu_read_unlock();
7343 return addr;
7344 }
7345
7346 static int fsctl_query_iface_info_ioctl(struct ksmbd_conn *conn,
7347 struct smb2_ioctl_rsp *rsp,
7348 unsigned int out_buf_len)
7349 {
7350 struct network_interface_info_ioctl_rsp *nii_rsp = NULL;
7351 int nbytes = 0;
7352 struct net_device *netdev;
7353 struct sockaddr_storage_rsp *sockaddr_storage;
7354 unsigned int flags;
7355 unsigned long long speed;
7356
7357 rtnl_lock();
7358 for_each_netdev(&init_net, netdev) {
7359 bool ipv4_set = false;
7360
7361 if (netdev->type == ARPHRD_LOOPBACK)
7362 continue;
7363
7364 flags = dev_get_flags(netdev);
7365 if (!(flags & IFF_RUNNING))
7366 continue;
7367 ipv6_retry:
7368 if (out_buf_len <
7369 nbytes + sizeof(struct network_interface_info_ioctl_rsp)) {
7370 rtnl_unlock();
7371 return -ENOSPC;
7372 }
7373
7374 nii_rsp = (struct network_interface_info_ioctl_rsp *)
7375 &rsp->Buffer[nbytes];
7376 nii_rsp->IfIndex = cpu_to_le32(netdev->ifindex);
7377
7378 nii_rsp->Capability = 0;
7379 if (netdev->real_num_tx_queues > 1)
7380 nii_rsp->Capability |= cpu_to_le32(RSS_CAPABLE);
7381 if (ksmbd_rdma_capable_netdev(netdev))
7382 nii_rsp->Capability |= cpu_to_le32(RDMA_CAPABLE);
7383
7384 nii_rsp->Next = cpu_to_le32(152);
7385 nii_rsp->Reserved = 0;
7386
7387 if (netdev->ethtool_ops->get_link_ksettings) {
7388 struct ethtool_link_ksettings cmd;
7389
7390 netdev->ethtool_ops->get_link_ksettings(netdev, &cmd);
7391 speed = cmd.base.speed;
7392 } else {
7393 ksmbd_debug(SMB, "%s %s\n", netdev->name,
7394 "speed is unknown, defaulting to 1Gb/sec");
7395 speed = SPEED_1000;
7396 }
7397
7398 speed *= 1000000;
7399 nii_rsp->LinkSpeed = cpu_to_le64(speed);
7400
7401 sockaddr_storage = (struct sockaddr_storage_rsp *)
7402 nii_rsp->SockAddr_Storage;
7403 memset(sockaddr_storage, 0, 128);
7404
7405 if (!ipv4_set) {
7406 struct in_device *idev;
7407
7408 sockaddr_storage->Family = cpu_to_le16(INTERNETWORK);
7409 sockaddr_storage->addr4.Port = 0;
7410
7411 idev = __in_dev_get_rtnl(netdev);
7412 if (!idev)
7413 continue;
7414 sockaddr_storage->addr4.IPv4address =
7415 idev_ipv4_address(idev);
7416 nbytes += sizeof(struct network_interface_info_ioctl_rsp);
7417 ipv4_set = true;
7418 goto ipv6_retry;
7419 } else {
7420 struct inet6_dev *idev6;
7421 struct inet6_ifaddr *ifa;
7422 __u8 *ipv6_addr = sockaddr_storage->addr6.IPv6address;
7423
7424 sockaddr_storage->Family = cpu_to_le16(INTERNETWORKV6);
7425 sockaddr_storage->addr6.Port = 0;
7426 sockaddr_storage->addr6.FlowInfo = 0;
7427
7428 idev6 = __in6_dev_get(netdev);
7429 if (!idev6)
7430 continue;
7431
7432 list_for_each_entry(ifa, &idev6->addr_list, if_list) {
7433 if (ifa->flags & (IFA_F_TENTATIVE |
7434 IFA_F_DEPRECATED))
7435 continue;
7436 memcpy(ipv6_addr, ifa->addr.s6_addr, 16);
7437 break;
7438 }
7439 sockaddr_storage->addr6.ScopeId = 0;
7440 nbytes += sizeof(struct network_interface_info_ioctl_rsp);
7441 }
7442 }
7443 rtnl_unlock();
7444
7445 /* zero if this is last one */
7446 if (nii_rsp)
7447 nii_rsp->Next = 0;
7448
7449 rsp->PersistentFileId = SMB2_NO_FID;
7450 rsp->VolatileFileId = SMB2_NO_FID;
7451 return nbytes;
7452 }
7453
7454 static int fsctl_validate_negotiate_info(struct ksmbd_conn *conn,
7455 struct validate_negotiate_info_req *neg_req,
7456 struct validate_negotiate_info_rsp *neg_rsp,
7457 unsigned int in_buf_len)
7458 {
7459 int ret = 0;
7460 int dialect;
7461
7462 if (in_buf_len < offsetof(struct validate_negotiate_info_req, Dialects) +
7463 le16_to_cpu(neg_req->DialectCount) * sizeof(__le16))
7464 return -EINVAL;
7465
7466 dialect = ksmbd_lookup_dialect_by_id(neg_req->Dialects,
7467 neg_req->DialectCount);
7468 if (dialect == BAD_PROT_ID || dialect != conn->dialect) {
7469 ret = -EINVAL;
7470 goto err_out;
7471 }
7472
7473 if (strncmp(neg_req->Guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE)) {
7474 ret = -EINVAL;
7475 goto err_out;
7476 }
7477
7478 if (le16_to_cpu(neg_req->SecurityMode) != conn->cli_sec_mode) {
7479 ret = -EINVAL;
7480 goto err_out;
7481 }
7482
7483 if (le32_to_cpu(neg_req->Capabilities) != conn->cli_cap) {
7484 ret = -EINVAL;
7485 goto err_out;
7486 }
7487
7488 neg_rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
7489 memset(neg_rsp->Guid, 0, SMB2_CLIENT_GUID_SIZE);
7490 neg_rsp->SecurityMode = cpu_to_le16(conn->srv_sec_mode);
7491 neg_rsp->Dialect = cpu_to_le16(conn->dialect);
7492 err_out:
7493 return ret;
7494 }
7495
7496 static int fsctl_query_allocated_ranges(struct ksmbd_work *work, u64 id,
7497 struct file_allocated_range_buffer *qar_req,
7498 struct file_allocated_range_buffer *qar_rsp,
7499 unsigned int in_count, unsigned int *out_count)
7500 {
7501 struct ksmbd_file *fp;
7502 loff_t start, length;
7503 int ret = 0;
7504
7505 *out_count = 0;
7506 if (in_count == 0)
7507 return -EINVAL;
7508
7509 start = le64_to_cpu(qar_req->file_offset);
7510 length = le64_to_cpu(qar_req->length);
7511
7512 if (start < 0 || length < 0)
7513 return -EINVAL;
7514
7515 fp = ksmbd_lookup_fd_fast(work, id);
7516 if (!fp)
7517 return -ENOENT;
7518
7519 ret = ksmbd_vfs_fqar_lseek(fp, start, length,
7520 qar_rsp, in_count, out_count);
7521 if (ret && ret != -E2BIG)
7522 *out_count = 0;
7523
7524 ksmbd_fd_put(work, fp);
7525 return ret;
7526 }
7527
7528 static int fsctl_pipe_transceive(struct ksmbd_work *work, u64 id,
7529 unsigned int out_buf_len,
7530 struct smb2_ioctl_req *req,
7531 struct smb2_ioctl_rsp *rsp)
7532 {
7533 struct ksmbd_rpc_command *rpc_resp;
7534 char *data_buf = (char *)&req->Buffer[0];
7535 int nbytes = 0;
7536
7537 rpc_resp = ksmbd_rpc_ioctl(work->sess, id, data_buf,
7538 le32_to_cpu(req->InputCount));
7539 if (rpc_resp) {
7540 if (rpc_resp->flags == KSMBD_RPC_SOME_NOT_MAPPED) {
7541 /*
7542 * set STATUS_SOME_NOT_MAPPED response
7543 * for unknown domain sid.
7544 */
7545 rsp->hdr.Status = STATUS_SOME_NOT_MAPPED;
7546 } else if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) {
7547 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
7548 goto out;
7549 } else if (rpc_resp->flags != KSMBD_RPC_OK) {
7550 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7551 goto out;
7552 }
7553
7554 nbytes = rpc_resp->payload_sz;
7555 if (rpc_resp->payload_sz > out_buf_len) {
7556 rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
7557 nbytes = out_buf_len;
7558 }
7559
7560 if (!rpc_resp->payload_sz) {
7561 rsp->hdr.Status =
7562 STATUS_UNEXPECTED_IO_ERROR;
7563 goto out;
7564 }
7565
7566 memcpy((char *)rsp->Buffer, rpc_resp->payload, nbytes);
7567 }
7568 out:
7569 kvfree(rpc_resp);
7570 return nbytes;
7571 }
7572
7573 static inline int fsctl_set_sparse(struct ksmbd_work *work, u64 id,
7574 struct file_sparse *sparse)
7575 {
7576 struct ksmbd_file *fp;
7577 struct mnt_idmap *idmap;
7578 int ret = 0;
7579 __le32 old_fattr;
7580
7581 fp = ksmbd_lookup_fd_fast(work, id);
7582 if (!fp)
7583 return -ENOENT;
7584 idmap = file_mnt_idmap(fp->filp);
7585
7586 old_fattr = fp->f_ci->m_fattr;
7587 if (sparse->SetSparse)
7588 fp->f_ci->m_fattr |= FILE_ATTRIBUTE_SPARSE_FILE_LE;
7589 else
7590 fp->f_ci->m_fattr &= ~FILE_ATTRIBUTE_SPARSE_FILE_LE;
7591
7592 if (fp->f_ci->m_fattr != old_fattr &&
7593 test_share_config_flag(work->tcon->share_conf,
7594 KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) {
7595 struct xattr_dos_attrib da;
7596
7597 ret = ksmbd_vfs_get_dos_attrib_xattr(idmap,
7598 fp->filp->f_path.dentry, &da);
7599 if (ret <= 0)
7600 goto out;
7601
7602 da.attr = le32_to_cpu(fp->f_ci->m_fattr);
7603 ret = ksmbd_vfs_set_dos_attrib_xattr(idmap,
7604 &fp->filp->f_path,
7605 &da, true);
7606 if (ret)
7607 fp->f_ci->m_fattr = old_fattr;
7608 }
7609
7610 out:
7611 ksmbd_fd_put(work, fp);
7612 return ret;
7613 }
7614
7615 static int fsctl_request_resume_key(struct ksmbd_work *work,
7616 struct smb2_ioctl_req *req,
7617 struct resume_key_ioctl_rsp *key_rsp)
7618 {
7619 struct ksmbd_file *fp;
7620
7621 fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
7622 if (!fp)
7623 return -ENOENT;
7624
7625 memset(key_rsp, 0, sizeof(*key_rsp));
7626 key_rsp->ResumeKey[0] = req->VolatileFileId;
7627 key_rsp->ResumeKey[1] = req->PersistentFileId;
7628 ksmbd_fd_put(work, fp);
7629
7630 return 0;
7631 }
7632
7633 /**
7634 * smb2_ioctl() - handler for smb2 ioctl command
7635 * @work: smb work containing ioctl command buffer
7636 *
7637 * Return: 0 on success, otherwise error
7638 */
7639 int smb2_ioctl(struct ksmbd_work *work)
7640 {
7641 struct smb2_ioctl_req *req;
7642 struct smb2_ioctl_rsp *rsp;
7643 unsigned int cnt_code, nbytes = 0, out_buf_len, in_buf_len;
7644 u64 id = KSMBD_NO_FID;
7645 struct ksmbd_conn *conn = work->conn;
7646 int ret = 0;
7647
7648 if (work->next_smb2_rcv_hdr_off) {
7649 req = ksmbd_req_buf_next(work);
7650 rsp = ksmbd_resp_buf_next(work);
7651 if (!has_file_id(req->VolatileFileId)) {
7652 ksmbd_debug(SMB, "Compound request set FID = %llu\n",
7653 work->compound_fid);
7654 id = work->compound_fid;
7655 }
7656 } else {
7657 req = smb2_get_msg(work->request_buf);
7658 rsp = smb2_get_msg(work->response_buf);
7659 }
7660
7661 if (!has_file_id(id))
7662 id = req->VolatileFileId;
7663
7664 if (req->Flags != cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL)) {
7665 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
7666 goto out;
7667 }
7668
7669 cnt_code = le32_to_cpu(req->CtlCode);
7670 ret = smb2_calc_max_out_buf_len(work, 48,
7671 le32_to_cpu(req->MaxOutputResponse));
7672 if (ret < 0) {
7673 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7674 goto out;
7675 }
7676 out_buf_len = (unsigned int)ret;
7677 in_buf_len = le32_to_cpu(req->InputCount);
7678
7679 switch (cnt_code) {
7680 case FSCTL_DFS_GET_REFERRALS:
7681 case FSCTL_DFS_GET_REFERRALS_EX:
7682 /* Not support DFS yet */
7683 rsp->hdr.Status = STATUS_FS_DRIVER_REQUIRED;
7684 goto out;
7685 case FSCTL_CREATE_OR_GET_OBJECT_ID:
7686 {
7687 struct file_object_buf_type1_ioctl_rsp *obj_buf;
7688
7689 nbytes = sizeof(struct file_object_buf_type1_ioctl_rsp);
7690 obj_buf = (struct file_object_buf_type1_ioctl_rsp *)
7691 &rsp->Buffer[0];
7692
7693 /*
7694 * TODO: This is dummy implementation to pass smbtorture
7695 * Need to check correct response later
7696 */
7697 memset(obj_buf->ObjectId, 0x0, 16);
7698 memset(obj_buf->BirthVolumeId, 0x0, 16);
7699 memset(obj_buf->BirthObjectId, 0x0, 16);
7700 memset(obj_buf->DomainId, 0x0, 16);
7701
7702 break;
7703 }
7704 case FSCTL_PIPE_TRANSCEIVE:
7705 out_buf_len = min_t(u32, KSMBD_IPC_MAX_PAYLOAD, out_buf_len);
7706 nbytes = fsctl_pipe_transceive(work, id, out_buf_len, req, rsp);
7707 break;
7708 case FSCTL_VALIDATE_NEGOTIATE_INFO:
7709 if (conn->dialect < SMB30_PROT_ID) {
7710 ret = -EOPNOTSUPP;
7711 goto out;
7712 }
7713
7714 if (in_buf_len < offsetof(struct validate_negotiate_info_req,
7715 Dialects)) {
7716 ret = -EINVAL;
7717 goto out;
7718 }
7719
7720 if (out_buf_len < sizeof(struct validate_negotiate_info_rsp)) {
7721 ret = -EINVAL;
7722 goto out;
7723 }
7724
7725 ret = fsctl_validate_negotiate_info(conn,
7726 (struct validate_negotiate_info_req *)&req->Buffer[0],
7727 (struct validate_negotiate_info_rsp *)&rsp->Buffer[0],
7728 in_buf_len);
7729 if (ret < 0)
7730 goto out;
7731
7732 nbytes = sizeof(struct validate_negotiate_info_rsp);
7733 rsp->PersistentFileId = SMB2_NO_FID;
7734 rsp->VolatileFileId = SMB2_NO_FID;
7735 break;
7736 case FSCTL_QUERY_NETWORK_INTERFACE_INFO:
7737 ret = fsctl_query_iface_info_ioctl(conn, rsp, out_buf_len);
7738 if (ret < 0)
7739 goto out;
7740 nbytes = ret;
7741 break;
7742 case FSCTL_REQUEST_RESUME_KEY:
7743 if (out_buf_len < sizeof(struct resume_key_ioctl_rsp)) {
7744 ret = -EINVAL;
7745 goto out;
7746 }
7747
7748 ret = fsctl_request_resume_key(work, req,
7749 (struct resume_key_ioctl_rsp *)&rsp->Buffer[0]);
7750 if (ret < 0)
7751 goto out;
7752 rsp->PersistentFileId = req->PersistentFileId;
7753 rsp->VolatileFileId = req->VolatileFileId;
7754 nbytes = sizeof(struct resume_key_ioctl_rsp);
7755 break;
7756 case FSCTL_COPYCHUNK:
7757 case FSCTL_COPYCHUNK_WRITE:
7758 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
7759 ksmbd_debug(SMB,
7760 "User does not have write permission\n");
7761 ret = -EACCES;
7762 goto out;
7763 }
7764
7765 if (in_buf_len < sizeof(struct copychunk_ioctl_req)) {
7766 ret = -EINVAL;
7767 goto out;
7768 }
7769
7770 if (out_buf_len < sizeof(struct copychunk_ioctl_rsp)) {
7771 ret = -EINVAL;
7772 goto out;
7773 }
7774
7775 nbytes = sizeof(struct copychunk_ioctl_rsp);
7776 rsp->VolatileFileId = req->VolatileFileId;
7777 rsp->PersistentFileId = req->PersistentFileId;
7778 fsctl_copychunk(work,
7779 (struct copychunk_ioctl_req *)&req->Buffer[0],
7780 le32_to_cpu(req->CtlCode),
7781 le32_to_cpu(req->InputCount),
7782 req->VolatileFileId,
7783 req->PersistentFileId,
7784 rsp);
7785 break;
7786 case FSCTL_SET_SPARSE:
7787 if (in_buf_len < sizeof(struct file_sparse)) {
7788 ret = -EINVAL;
7789 goto out;
7790 }
7791
7792 ret = fsctl_set_sparse(work, id,
7793 (struct file_sparse *)&req->Buffer[0]);
7794 if (ret < 0)
7795 goto out;
7796 break;
7797 case FSCTL_SET_ZERO_DATA:
7798 {
7799 struct file_zero_data_information *zero_data;
7800 struct ksmbd_file *fp;
7801 loff_t off, len, bfz;
7802
7803 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
7804 ksmbd_debug(SMB,
7805 "User does not have write permission\n");
7806 ret = -EACCES;
7807 goto out;
7808 }
7809
7810 if (in_buf_len < sizeof(struct file_zero_data_information)) {
7811 ret = -EINVAL;
7812 goto out;
7813 }
7814
7815 zero_data =
7816 (struct file_zero_data_information *)&req->Buffer[0];
7817
7818 off = le64_to_cpu(zero_data->FileOffset);
7819 bfz = le64_to_cpu(zero_data->BeyondFinalZero);
7820 if (off < 0 || bfz < 0 || off > bfz) {
7821 ret = -EINVAL;
7822 goto out;
7823 }
7824
7825 len = bfz - off;
7826 if (len) {
7827 fp = ksmbd_lookup_fd_fast(work, id);
7828 if (!fp) {
7829 ret = -ENOENT;
7830 goto out;
7831 }
7832
7833 ret = ksmbd_vfs_zero_data(work, fp, off, len);
7834 ksmbd_fd_put(work, fp);
7835 if (ret < 0)
7836 goto out;
7837 }
7838 break;
7839 }
7840 case FSCTL_QUERY_ALLOCATED_RANGES:
7841 if (in_buf_len < sizeof(struct file_allocated_range_buffer)) {
7842 ret = -EINVAL;
7843 goto out;
7844 }
7845
7846 ret = fsctl_query_allocated_ranges(work, id,
7847 (struct file_allocated_range_buffer *)&req->Buffer[0],
7848 (struct file_allocated_range_buffer *)&rsp->Buffer[0],
7849 out_buf_len /
7850 sizeof(struct file_allocated_range_buffer), &nbytes);
7851 if (ret == -E2BIG) {
7852 rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
7853 } else if (ret < 0) {
7854 nbytes = 0;
7855 goto out;
7856 }
7857
7858 nbytes *= sizeof(struct file_allocated_range_buffer);
7859 break;
7860 case FSCTL_GET_REPARSE_POINT:
7861 {
7862 struct reparse_data_buffer *reparse_ptr;
7863 struct ksmbd_file *fp;
7864
7865 reparse_ptr = (struct reparse_data_buffer *)&rsp->Buffer[0];
7866 fp = ksmbd_lookup_fd_fast(work, id);
7867 if (!fp) {
7868 pr_err("not found fp!!\n");
7869 ret = -ENOENT;
7870 goto out;
7871 }
7872
7873 reparse_ptr->ReparseTag =
7874 smb2_get_reparse_tag_special_file(file_inode(fp->filp)->i_mode);
7875 reparse_ptr->ReparseDataLength = 0;
7876 ksmbd_fd_put(work, fp);
7877 nbytes = sizeof(struct reparse_data_buffer);
7878 break;
7879 }
7880 case FSCTL_DUPLICATE_EXTENTS_TO_FILE:
7881 {
7882 struct ksmbd_file *fp_in, *fp_out = NULL;
7883 struct duplicate_extents_to_file *dup_ext;
7884 loff_t src_off, dst_off, length, cloned;
7885
7886 if (in_buf_len < sizeof(struct duplicate_extents_to_file)) {
7887 ret = -EINVAL;
7888 goto out;
7889 }
7890
7891 dup_ext = (struct duplicate_extents_to_file *)&req->Buffer[0];
7892
7893 fp_in = ksmbd_lookup_fd_slow(work, dup_ext->VolatileFileHandle,
7894 dup_ext->PersistentFileHandle);
7895 if (!fp_in) {
7896 pr_err("not found file handle in duplicate extent to file\n");
7897 ret = -ENOENT;
7898 goto out;
7899 }
7900
7901 fp_out = ksmbd_lookup_fd_fast(work, id);
7902 if (!fp_out) {
7903 pr_err("not found fp\n");
7904 ret = -ENOENT;
7905 goto dup_ext_out;
7906 }
7907
7908 src_off = le64_to_cpu(dup_ext->SourceFileOffset);
7909 dst_off = le64_to_cpu(dup_ext->TargetFileOffset);
7910 length = le64_to_cpu(dup_ext->ByteCount);
7911 /*
7912 * XXX: It is not clear if FSCTL_DUPLICATE_EXTENTS_TO_FILE
7913 * should fall back to vfs_copy_file_range(). This could be
7914 * beneficial when re-exporting nfs/smb mount, but note that
7915 * this can result in partial copy that returns an error status.
7916 * If/when FSCTL_DUPLICATE_EXTENTS_TO_FILE_EX is implemented,
7917 * fall back to vfs_copy_file_range(), should be avoided when
7918 * the flag DUPLICATE_EXTENTS_DATA_EX_SOURCE_ATOMIC is set.
7919 */
7920 cloned = vfs_clone_file_range(fp_in->filp, src_off,
7921 fp_out->filp, dst_off, length, 0);
7922 if (cloned == -EXDEV || cloned == -EOPNOTSUPP) {
7923 ret = -EOPNOTSUPP;
7924 goto dup_ext_out;
7925 } else if (cloned != length) {
7926 cloned = vfs_copy_file_range(fp_in->filp, src_off,
7927 fp_out->filp, dst_off,
7928 length, 0);
7929 if (cloned != length) {
7930 if (cloned < 0)
7931 ret = cloned;
7932 else
7933 ret = -EINVAL;
7934 }
7935 }
7936
7937 dup_ext_out:
7938 ksmbd_fd_put(work, fp_in);
7939 ksmbd_fd_put(work, fp_out);
7940 if (ret < 0)
7941 goto out;
7942 break;
7943 }
7944 default:
7945 ksmbd_debug(SMB, "not implemented yet ioctl command 0x%x\n",
7946 cnt_code);
7947 ret = -EOPNOTSUPP;
7948 goto out;
7949 }
7950
7951 rsp->CtlCode = cpu_to_le32(cnt_code);
7952 rsp->InputCount = cpu_to_le32(0);
7953 rsp->InputOffset = cpu_to_le32(112);
7954 rsp->OutputOffset = cpu_to_le32(112);
7955 rsp->OutputCount = cpu_to_le32(nbytes);
7956 rsp->StructureSize = cpu_to_le16(49);
7957 rsp->Reserved = cpu_to_le16(0);
7958 rsp->Flags = cpu_to_le32(0);
7959 rsp->Reserved2 = cpu_to_le32(0);
7960 ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_ioctl_rsp) + nbytes);
7961 if (!ret)
7962 return ret;
7963
7964 out:
7965 if (ret == -EACCES)
7966 rsp->hdr.Status = STATUS_ACCESS_DENIED;
7967 else if (ret == -ENOENT)
7968 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
7969 else if (ret == -EOPNOTSUPP)
7970 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
7971 else if (ret == -ENOSPC)
7972 rsp->hdr.Status = STATUS_BUFFER_TOO_SMALL;
7973 else if (ret < 0 || rsp->hdr.Status == 0)
7974 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7975 smb2_set_err_rsp(work);
7976 return 0;
7977 }
7978
7979 /**
7980 * smb20_oplock_break_ack() - handler for smb2.0 oplock break command
7981 * @work: smb work containing oplock break command buffer
7982 *
7983 * Return: 0
7984 */
7985 static void smb20_oplock_break_ack(struct ksmbd_work *work)
7986 {
7987 struct smb2_oplock_break *req;
7988 struct smb2_oplock_break *rsp;
7989 struct ksmbd_file *fp;
7990 struct oplock_info *opinfo = NULL;
7991 __le32 err = 0;
7992 int ret = 0;
7993 u64 volatile_id, persistent_id;
7994 char req_oplevel = 0, rsp_oplevel = 0;
7995 unsigned int oplock_change_type;
7996
7997 WORK_BUFFERS(work, req, rsp);
7998
7999 volatile_id = req->VolatileFid;
8000 persistent_id = req->PersistentFid;
8001 req_oplevel = req->OplockLevel;
8002 ksmbd_debug(OPLOCK, "v_id %llu, p_id %llu request oplock level %d\n",
8003 volatile_id, persistent_id, req_oplevel);
8004
8005 fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id);
8006 if (!fp) {
8007 rsp->hdr.Status = STATUS_FILE_CLOSED;
8008 smb2_set_err_rsp(work);
8009 return;
8010 }
8011
8012 opinfo = opinfo_get(fp);
8013 if (!opinfo) {
8014 pr_err("unexpected null oplock_info\n");
8015 rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL;
8016 smb2_set_err_rsp(work);
8017 ksmbd_fd_put(work, fp);
8018 return;
8019 }
8020
8021 if (opinfo->level == SMB2_OPLOCK_LEVEL_NONE) {
8022 rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL;
8023 goto err_out;
8024 }
8025
8026 if (opinfo->op_state == OPLOCK_STATE_NONE) {
8027 ksmbd_debug(SMB, "unexpected oplock state 0x%x\n", opinfo->op_state);
8028 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8029 goto err_out;
8030 }
8031
8032 if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
8033 opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
8034 (req_oplevel != SMB2_OPLOCK_LEVEL_II &&
8035 req_oplevel != SMB2_OPLOCK_LEVEL_NONE)) {
8036 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8037 oplock_change_type = OPLOCK_WRITE_TO_NONE;
8038 } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II &&
8039 req_oplevel != SMB2_OPLOCK_LEVEL_NONE) {
8040 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8041 oplock_change_type = OPLOCK_READ_TO_NONE;
8042 } else if (req_oplevel == SMB2_OPLOCK_LEVEL_II ||
8043 req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
8044 err = STATUS_INVALID_DEVICE_STATE;
8045 if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
8046 opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
8047 req_oplevel == SMB2_OPLOCK_LEVEL_II) {
8048 oplock_change_type = OPLOCK_WRITE_TO_READ;
8049 } else if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
8050 opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
8051 req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
8052 oplock_change_type = OPLOCK_WRITE_TO_NONE;
8053 } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II &&
8054 req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
8055 oplock_change_type = OPLOCK_READ_TO_NONE;
8056 } else {
8057 oplock_change_type = 0;
8058 }
8059 } else {
8060 oplock_change_type = 0;
8061 }
8062
8063 switch (oplock_change_type) {
8064 case OPLOCK_WRITE_TO_READ:
8065 ret = opinfo_write_to_read(opinfo);
8066 rsp_oplevel = SMB2_OPLOCK_LEVEL_II;
8067 break;
8068 case OPLOCK_WRITE_TO_NONE:
8069 ret = opinfo_write_to_none(opinfo);
8070 rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE;
8071 break;
8072 case OPLOCK_READ_TO_NONE:
8073 ret = opinfo_read_to_none(opinfo);
8074 rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE;
8075 break;
8076 default:
8077 pr_err("unknown oplock change 0x%x -> 0x%x\n",
8078 opinfo->level, rsp_oplevel);
8079 }
8080
8081 if (ret < 0) {
8082 rsp->hdr.Status = err;
8083 goto err_out;
8084 }
8085
8086 opinfo->op_state = OPLOCK_STATE_NONE;
8087 wake_up_interruptible_all(&opinfo->oplock_q);
8088 opinfo_put(opinfo);
8089 ksmbd_fd_put(work, fp);
8090
8091 rsp->StructureSize = cpu_to_le16(24);
8092 rsp->OplockLevel = rsp_oplevel;
8093 rsp->Reserved = 0;
8094 rsp->Reserved2 = 0;
8095 rsp->VolatileFid = volatile_id;
8096 rsp->PersistentFid = persistent_id;
8097 ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_oplock_break));
8098 if (!ret)
8099 return;
8100
8101 err_out:
8102 opinfo->op_state = OPLOCK_STATE_NONE;
8103 wake_up_interruptible_all(&opinfo->oplock_q);
8104
8105 opinfo_put(opinfo);
8106 ksmbd_fd_put(work, fp);
8107 smb2_set_err_rsp(work);
8108 }
8109
8110 static int check_lease_state(struct lease *lease, __le32 req_state)
8111 {
8112 if ((lease->new_state ==
8113 (SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE)) &&
8114 !(req_state & SMB2_LEASE_WRITE_CACHING_LE)) {
8115 lease->new_state = req_state;
8116 return 0;
8117 }
8118
8119 if (lease->new_state == req_state)
8120 return 0;
8121
8122 return 1;
8123 }
8124
8125 /**
8126 * smb21_lease_break_ack() - handler for smb2.1 lease break command
8127 * @work: smb work containing lease break command buffer
8128 *
8129 * Return: 0
8130 */
8131 static void smb21_lease_break_ack(struct ksmbd_work *work)
8132 {
8133 struct ksmbd_conn *conn = work->conn;
8134 struct smb2_lease_ack *req;
8135 struct smb2_lease_ack *rsp;
8136 struct oplock_info *opinfo;
8137 __le32 err = 0;
8138 int ret = 0;
8139 unsigned int lease_change_type;
8140 __le32 lease_state;
8141 struct lease *lease;
8142
8143 WORK_BUFFERS(work, req, rsp);
8144
8145 ksmbd_debug(OPLOCK, "smb21 lease break, lease state(0x%x)\n",
8146 le32_to_cpu(req->LeaseState));
8147 opinfo = lookup_lease_in_table(conn, req->LeaseKey);
8148 if (!opinfo) {
8149 ksmbd_debug(OPLOCK, "file not opened\n");
8150 smb2_set_err_rsp(work);
8151 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8152 return;
8153 }
8154 lease = opinfo->o_lease;
8155
8156 if (opinfo->op_state == OPLOCK_STATE_NONE) {
8157 pr_err("unexpected lease break state 0x%x\n",
8158 opinfo->op_state);
8159 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8160 goto err_out;
8161 }
8162
8163 if (check_lease_state(lease, req->LeaseState)) {
8164 rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED;
8165 ksmbd_debug(OPLOCK,
8166 "req lease state: 0x%x, expected state: 0x%x\n",
8167 req->LeaseState, lease->new_state);
8168 goto err_out;
8169 }
8170
8171 if (!atomic_read(&opinfo->breaking_cnt)) {
8172 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8173 goto err_out;
8174 }
8175
8176 /* check for bad lease state */
8177 if (req->LeaseState &
8178 (~(SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE))) {
8179 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8180 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8181 lease_change_type = OPLOCK_WRITE_TO_NONE;
8182 else
8183 lease_change_type = OPLOCK_READ_TO_NONE;
8184 ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n",
8185 le32_to_cpu(lease->state),
8186 le32_to_cpu(req->LeaseState));
8187 } else if (lease->state == SMB2_LEASE_READ_CACHING_LE &&
8188 req->LeaseState != SMB2_LEASE_NONE_LE) {
8189 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8190 lease_change_type = OPLOCK_READ_TO_NONE;
8191 ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n",
8192 le32_to_cpu(lease->state),
8193 le32_to_cpu(req->LeaseState));
8194 } else {
8195 /* valid lease state changes */
8196 err = STATUS_INVALID_DEVICE_STATE;
8197 if (req->LeaseState == SMB2_LEASE_NONE_LE) {
8198 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8199 lease_change_type = OPLOCK_WRITE_TO_NONE;
8200 else
8201 lease_change_type = OPLOCK_READ_TO_NONE;
8202 } else if (req->LeaseState & SMB2_LEASE_READ_CACHING_LE) {
8203 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8204 lease_change_type = OPLOCK_WRITE_TO_READ;
8205 else
8206 lease_change_type = OPLOCK_READ_HANDLE_TO_READ;
8207 } else {
8208 lease_change_type = 0;
8209 }
8210 }
8211
8212 switch (lease_change_type) {
8213 case OPLOCK_WRITE_TO_READ:
8214 ret = opinfo_write_to_read(opinfo);
8215 break;
8216 case OPLOCK_READ_HANDLE_TO_READ:
8217 ret = opinfo_read_handle_to_read(opinfo);
8218 break;
8219 case OPLOCK_WRITE_TO_NONE:
8220 ret = opinfo_write_to_none(opinfo);
8221 break;
8222 case OPLOCK_READ_TO_NONE:
8223 ret = opinfo_read_to_none(opinfo);
8224 break;
8225 default:
8226 ksmbd_debug(OPLOCK, "unknown lease change 0x%x -> 0x%x\n",
8227 le32_to_cpu(lease->state),
8228 le32_to_cpu(req->LeaseState));
8229 }
8230
8231 if (ret < 0) {
8232 rsp->hdr.Status = err;
8233 goto err_out;
8234 }
8235
8236 lease_state = lease->state;
8237 opinfo->op_state = OPLOCK_STATE_NONE;
8238 wake_up_interruptible_all(&opinfo->oplock_q);
8239 atomic_dec(&opinfo->breaking_cnt);
8240 wake_up_interruptible_all(&opinfo->oplock_brk);
8241 opinfo_put(opinfo);
8242
8243 rsp->StructureSize = cpu_to_le16(36);
8244 rsp->Reserved = 0;
8245 rsp->Flags = 0;
8246 memcpy(rsp->LeaseKey, req->LeaseKey, 16);
8247 rsp->LeaseState = lease_state;
8248 rsp->LeaseDuration = 0;
8249 ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_lease_ack));
8250 if (!ret)
8251 return;
8252
8253 err_out:
8254 wake_up_interruptible_all(&opinfo->oplock_q);
8255 atomic_dec(&opinfo->breaking_cnt);
8256 wake_up_interruptible_all(&opinfo->oplock_brk);
8257
8258 opinfo_put(opinfo);
8259 smb2_set_err_rsp(work);
8260 }
8261
8262 /**
8263 * smb2_oplock_break() - dispatcher for smb2.0 and 2.1 oplock/lease break
8264 * @work: smb work containing oplock/lease break command buffer
8265 *
8266 * Return: 0
8267 */
8268 int smb2_oplock_break(struct ksmbd_work *work)
8269 {
8270 struct smb2_oplock_break *req;
8271 struct smb2_oplock_break *rsp;
8272
8273 WORK_BUFFERS(work, req, rsp);
8274
8275 switch (le16_to_cpu(req->StructureSize)) {
8276 case OP_BREAK_STRUCT_SIZE_20:
8277 smb20_oplock_break_ack(work);
8278 break;
8279 case OP_BREAK_STRUCT_SIZE_21:
8280 smb21_lease_break_ack(work);
8281 break;
8282 default:
8283 ksmbd_debug(OPLOCK, "invalid break cmd %d\n",
8284 le16_to_cpu(req->StructureSize));
8285 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
8286 smb2_set_err_rsp(work);
8287 }
8288
8289 return 0;
8290 }
8291
8292 /**
8293 * smb2_notify() - handler for smb2 notify request
8294 * @work: smb work containing notify command buffer
8295 *
8296 * Return: 0
8297 */
8298 int smb2_notify(struct ksmbd_work *work)
8299 {
8300 struct smb2_change_notify_req *req;
8301 struct smb2_change_notify_rsp *rsp;
8302
8303 WORK_BUFFERS(work, req, rsp);
8304
8305 if (work->next_smb2_rcv_hdr_off && req->hdr.NextCommand) {
8306 rsp->hdr.Status = STATUS_INTERNAL_ERROR;
8307 smb2_set_err_rsp(work);
8308 return 0;
8309 }
8310
8311 smb2_set_err_rsp(work);
8312 rsp->hdr.Status = STATUS_NOT_IMPLEMENTED;
8313 return 0;
8314 }
8315
8316 /**
8317 * smb2_is_sign_req() - handler for checking packet signing status
8318 * @work: smb work containing notify command buffer
8319 * @command: SMB2 command id
8320 *
8321 * Return: true if packed is signed, false otherwise
8322 */
8323 bool smb2_is_sign_req(struct ksmbd_work *work, unsigned int command)
8324 {
8325 struct smb2_hdr *rcv_hdr2 = smb2_get_msg(work->request_buf);
8326
8327 if ((rcv_hdr2->Flags & SMB2_FLAGS_SIGNED) &&
8328 command != SMB2_NEGOTIATE_HE &&
8329 command != SMB2_SESSION_SETUP_HE &&
8330 command != SMB2_OPLOCK_BREAK_HE)
8331 return true;
8332
8333 return false;
8334 }
8335
8336 /**
8337 * smb2_check_sign_req() - handler for req packet sign processing
8338 * @work: smb work containing notify command buffer
8339 *
8340 * Return: 1 on success, 0 otherwise
8341 */
8342 int smb2_check_sign_req(struct ksmbd_work *work)
8343 {
8344 struct smb2_hdr *hdr;
8345 char signature_req[SMB2_SIGNATURE_SIZE];
8346 char signature[SMB2_HMACSHA256_SIZE];
8347 struct kvec iov[1];
8348 size_t len;
8349
8350 hdr = smb2_get_msg(work->request_buf);
8351 if (work->next_smb2_rcv_hdr_off)
8352 hdr = ksmbd_req_buf_next(work);
8353
8354 if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off)
8355 len = get_rfc1002_len(work->request_buf);
8356 else if (hdr->NextCommand)
8357 len = le32_to_cpu(hdr->NextCommand);
8358 else
8359 len = get_rfc1002_len(work->request_buf) -
8360 work->next_smb2_rcv_hdr_off;
8361
8362 memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE);
8363 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8364
8365 iov[0].iov_base = (char *)&hdr->ProtocolId;
8366 iov[0].iov_len = len;
8367
8368 if (ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, 1,
8369 signature))
8370 return 0;
8371
8372 if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) {
8373 pr_err("bad smb2 signature\n");
8374 return 0;
8375 }
8376
8377 return 1;
8378 }
8379
8380 /**
8381 * smb2_set_sign_rsp() - handler for rsp packet sign processing
8382 * @work: smb work containing notify command buffer
8383 *
8384 */
8385 void smb2_set_sign_rsp(struct ksmbd_work *work)
8386 {
8387 struct smb2_hdr *hdr;
8388 char signature[SMB2_HMACSHA256_SIZE];
8389 struct kvec *iov;
8390 int n_vec = 1;
8391
8392 hdr = ksmbd_resp_buf_curr(work);
8393 hdr->Flags |= SMB2_FLAGS_SIGNED;
8394 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8395
8396 if (hdr->Command == SMB2_READ) {
8397 iov = &work->iov[work->iov_idx - 1];
8398 n_vec++;
8399 } else {
8400 iov = &work->iov[work->iov_idx];
8401 }
8402
8403 if (!ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, n_vec,
8404 signature))
8405 memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE);
8406 }
8407
8408 /**
8409 * smb3_check_sign_req() - handler for req packet sign processing
8410 * @work: smb work containing notify command buffer
8411 *
8412 * Return: 1 on success, 0 otherwise
8413 */
8414 int smb3_check_sign_req(struct ksmbd_work *work)
8415 {
8416 struct ksmbd_conn *conn = work->conn;
8417 char *signing_key;
8418 struct smb2_hdr *hdr;
8419 struct channel *chann;
8420 char signature_req[SMB2_SIGNATURE_SIZE];
8421 char signature[SMB2_CMACAES_SIZE];
8422 struct kvec iov[1];
8423 size_t len;
8424
8425 hdr = smb2_get_msg(work->request_buf);
8426 if (work->next_smb2_rcv_hdr_off)
8427 hdr = ksmbd_req_buf_next(work);
8428
8429 if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off)
8430 len = get_rfc1002_len(work->request_buf);
8431 else if (hdr->NextCommand)
8432 len = le32_to_cpu(hdr->NextCommand);
8433 else
8434 len = get_rfc1002_len(work->request_buf) -
8435 work->next_smb2_rcv_hdr_off;
8436
8437 if (le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) {
8438 signing_key = work->sess->smb3signingkey;
8439 } else {
8440 chann = lookup_chann_list(work->sess, conn);
8441 if (!chann) {
8442 return 0;
8443 }
8444 signing_key = chann->smb3signingkey;
8445 }
8446
8447 if (!signing_key) {
8448 pr_err("SMB3 signing key is not generated\n");
8449 return 0;
8450 }
8451
8452 memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE);
8453 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8454 iov[0].iov_base = (char *)&hdr->ProtocolId;
8455 iov[0].iov_len = len;
8456
8457 if (ksmbd_sign_smb3_pdu(conn, signing_key, iov, 1, signature))
8458 return 0;
8459
8460 if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) {
8461 pr_err("bad smb2 signature\n");
8462 return 0;
8463 }
8464
8465 return 1;
8466 }
8467
8468 /**
8469 * smb3_set_sign_rsp() - handler for rsp packet sign processing
8470 * @work: smb work containing notify command buffer
8471 *
8472 */
8473 void smb3_set_sign_rsp(struct ksmbd_work *work)
8474 {
8475 struct ksmbd_conn *conn = work->conn;
8476 struct smb2_hdr *hdr;
8477 struct channel *chann;
8478 char signature[SMB2_CMACAES_SIZE];
8479 struct kvec *iov;
8480 int n_vec = 1;
8481 char *signing_key;
8482
8483 hdr = ksmbd_resp_buf_curr(work);
8484
8485 if (conn->binding == false &&
8486 le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) {
8487 signing_key = work->sess->smb3signingkey;
8488 } else {
8489 chann = lookup_chann_list(work->sess, work->conn);
8490 if (!chann) {
8491 return;
8492 }
8493 signing_key = chann->smb3signingkey;
8494 }
8495
8496 if (!signing_key)
8497 return;
8498
8499 hdr->Flags |= SMB2_FLAGS_SIGNED;
8500 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8501
8502 if (hdr->Command == SMB2_READ) {
8503 iov = &work->iov[work->iov_idx - 1];
8504 n_vec++;
8505 } else {
8506 iov = &work->iov[work->iov_idx];
8507 }
8508
8509 if (!ksmbd_sign_smb3_pdu(conn, signing_key, iov, n_vec,
8510 signature))
8511 memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE);
8512 }
8513
8514 /**
8515 * smb3_preauth_hash_rsp() - handler for computing preauth hash on response
8516 * @work: smb work containing response buffer
8517 *
8518 */
8519 void smb3_preauth_hash_rsp(struct ksmbd_work *work)
8520 {
8521 struct ksmbd_conn *conn = work->conn;
8522 struct ksmbd_session *sess = work->sess;
8523 struct smb2_hdr *req, *rsp;
8524
8525 if (conn->dialect != SMB311_PROT_ID)
8526 return;
8527
8528 WORK_BUFFERS(work, req, rsp);
8529
8530 if (le16_to_cpu(req->Command) == SMB2_NEGOTIATE_HE &&
8531 conn->preauth_info)
8532 ksmbd_gen_preauth_integrity_hash(conn, work->response_buf,
8533 conn->preauth_info->Preauth_HashValue);
8534
8535 if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE && sess) {
8536 __u8 *hash_value;
8537
8538 if (conn->binding) {
8539 struct preauth_session *preauth_sess;
8540
8541 preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id);
8542 if (!preauth_sess)
8543 return;
8544 hash_value = preauth_sess->Preauth_HashValue;
8545 } else {
8546 hash_value = sess->Preauth_HashValue;
8547 if (!hash_value)
8548 return;
8549 }
8550 ksmbd_gen_preauth_integrity_hash(conn, work->response_buf,
8551 hash_value);
8552 }
8553 }
8554
8555 static void fill_transform_hdr(void *tr_buf, char *old_buf, __le16 cipher_type)
8556 {
8557 struct smb2_transform_hdr *tr_hdr = tr_buf + 4;
8558 struct smb2_hdr *hdr = smb2_get_msg(old_buf);
8559 unsigned int orig_len = get_rfc1002_len(old_buf);
8560
8561 /* tr_buf must be cleared by the caller */
8562 tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
8563 tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
8564 tr_hdr->Flags = cpu_to_le16(TRANSFORM_FLAG_ENCRYPTED);
8565 if (cipher_type == SMB2_ENCRYPTION_AES128_GCM ||
8566 cipher_type == SMB2_ENCRYPTION_AES256_GCM)
8567 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
8568 else
8569 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
8570 memcpy(&tr_hdr->SessionId, &hdr->SessionId, 8);
8571 inc_rfc1001_len(tr_buf, sizeof(struct smb2_transform_hdr));
8572 inc_rfc1001_len(tr_buf, orig_len);
8573 }
8574
8575 int smb3_encrypt_resp(struct ksmbd_work *work)
8576 {
8577 struct kvec *iov = work->iov;
8578 int rc = -ENOMEM;
8579 void *tr_buf;
8580
8581 tr_buf = kzalloc(sizeof(struct smb2_transform_hdr) + 4, GFP_KERNEL);
8582 if (!tr_buf)
8583 return rc;
8584
8585 /* fill transform header */
8586 fill_transform_hdr(tr_buf, work->response_buf, work->conn->cipher_type);
8587
8588 iov[0].iov_base = tr_buf;
8589 iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4;
8590 work->tr_buf = tr_buf;
8591
8592 return ksmbd_crypt_message(work, iov, work->iov_idx + 1, 1);
8593 }
8594
8595 bool smb3_is_transform_hdr(void *buf)
8596 {
8597 struct smb2_transform_hdr *trhdr = smb2_get_msg(buf);
8598
8599 return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
8600 }
8601
8602 int smb3_decrypt_req(struct ksmbd_work *work)
8603 {
8604 struct ksmbd_session *sess;
8605 char *buf = work->request_buf;
8606 unsigned int pdu_length = get_rfc1002_len(buf);
8607 struct kvec iov[2];
8608 int buf_data_size = pdu_length - sizeof(struct smb2_transform_hdr);
8609 struct smb2_transform_hdr *tr_hdr = smb2_get_msg(buf);
8610 int rc = 0;
8611
8612 if (pdu_length < sizeof(struct smb2_transform_hdr) ||
8613 buf_data_size < sizeof(struct smb2_hdr)) {
8614 pr_err("Transform message is too small (%u)\n",
8615 pdu_length);
8616 return -ECONNABORTED;
8617 }
8618
8619 if (buf_data_size < le32_to_cpu(tr_hdr->OriginalMessageSize)) {
8620 pr_err("Transform message is broken\n");
8621 return -ECONNABORTED;
8622 }
8623
8624 sess = ksmbd_session_lookup_all(work->conn, le64_to_cpu(tr_hdr->SessionId));
8625 if (!sess) {
8626 pr_err("invalid session id(%llx) in transform header\n",
8627 le64_to_cpu(tr_hdr->SessionId));
8628 return -ECONNABORTED;
8629 }
8630
8631 iov[0].iov_base = buf;
8632 iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4;
8633 iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr) + 4;
8634 iov[1].iov_len = buf_data_size;
8635 rc = ksmbd_crypt_message(work, iov, 2, 0);
8636 if (rc)
8637 return rc;
8638
8639 memmove(buf + 4, iov[1].iov_base, buf_data_size);
8640 *(__be32 *)buf = cpu_to_be32(buf_data_size);
8641
8642 return rc;
8643 }
8644
8645 bool smb3_11_final_sess_setup_resp(struct ksmbd_work *work)
8646 {
8647 struct ksmbd_conn *conn = work->conn;
8648 struct ksmbd_session *sess = work->sess;
8649 struct smb2_hdr *rsp = smb2_get_msg(work->response_buf);
8650
8651 if (conn->dialect < SMB30_PROT_ID)
8652 return false;
8653
8654 if (work->next_smb2_rcv_hdr_off)
8655 rsp = ksmbd_resp_buf_next(work);
8656
8657 if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE &&
8658 sess->user && !user_guest(sess->user) &&
8659 rsp->Status == STATUS_SUCCESS)
8660 return true;
8661 return false;
8662 }
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