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Merge tag 'loongarch-kvm-6.8' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhu...
[thirdparty/kernel/stable.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 secbuf_len = le16_to_cpu(req->SecurityBufferLength);
1418 if (secbuf_len < sizeof(struct authenticate_message)) {
1419 ksmbd_debug(SMB, "blob len %d too small\n", secbuf_len);
1420 return NULL;
1421 }
1422 authblob = user_authblob(conn, req);
1423 name_off = le32_to_cpu(authblob->UserName.BufferOffset);
1424 name_len = le16_to_cpu(authblob->UserName.Length);
1425
1426 if (secbuf_len < (u64)name_off + name_len)
1427 return NULL;
1428
1429 name = smb_strndup_from_utf16((const char *)authblob + name_off,
1430 name_len,
1431 true,
1432 conn->local_nls);
1433 if (IS_ERR(name)) {
1434 pr_err("cannot allocate memory\n");
1435 return NULL;
1436 }
1437
1438 ksmbd_debug(SMB, "session setup request for user %s\n", name);
1439 user = ksmbd_login_user(name);
1440 kfree(name);
1441 return user;
1442 }
1443
1444 static int ntlm_authenticate(struct ksmbd_work *work,
1445 struct smb2_sess_setup_req *req,
1446 struct smb2_sess_setup_rsp *rsp)
1447 {
1448 struct ksmbd_conn *conn = work->conn;
1449 struct ksmbd_session *sess = work->sess;
1450 struct channel *chann = NULL;
1451 struct ksmbd_user *user;
1452 u64 prev_id;
1453 int sz, rc;
1454
1455 ksmbd_debug(SMB, "authenticate phase\n");
1456 if (conn->use_spnego) {
1457 unsigned char *spnego_blob;
1458 u16 spnego_blob_len;
1459
1460 rc = build_spnego_ntlmssp_auth_blob(&spnego_blob,
1461 &spnego_blob_len,
1462 0);
1463 if (rc)
1464 return -ENOMEM;
1465
1466 sz = le16_to_cpu(rsp->SecurityBufferOffset);
1467 memcpy((char *)&rsp->hdr.ProtocolId + sz, spnego_blob, spnego_blob_len);
1468 rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len);
1469 kfree(spnego_blob);
1470 }
1471
1472 user = session_user(conn, req);
1473 if (!user) {
1474 ksmbd_debug(SMB, "Unknown user name or an error\n");
1475 return -EPERM;
1476 }
1477
1478 /* Check for previous session */
1479 prev_id = le64_to_cpu(req->PreviousSessionId);
1480 if (prev_id && prev_id != sess->id)
1481 destroy_previous_session(conn, user, prev_id);
1482
1483 if (sess->state == SMB2_SESSION_VALID) {
1484 /*
1485 * Reuse session if anonymous try to connect
1486 * on reauthetication.
1487 */
1488 if (conn->binding == false && ksmbd_anonymous_user(user)) {
1489 ksmbd_free_user(user);
1490 return 0;
1491 }
1492
1493 if (!ksmbd_compare_user(sess->user, user)) {
1494 ksmbd_free_user(user);
1495 return -EPERM;
1496 }
1497 ksmbd_free_user(user);
1498 } else {
1499 sess->user = user;
1500 }
1501
1502 if (conn->binding == false && user_guest(sess->user)) {
1503 rsp->SessionFlags = SMB2_SESSION_FLAG_IS_GUEST_LE;
1504 } else {
1505 struct authenticate_message *authblob;
1506
1507 authblob = user_authblob(conn, req);
1508 sz = le16_to_cpu(req->SecurityBufferLength);
1509 rc = ksmbd_decode_ntlmssp_auth_blob(authblob, sz, conn, sess);
1510 if (rc) {
1511 set_user_flag(sess->user, KSMBD_USER_FLAG_BAD_PASSWORD);
1512 ksmbd_debug(SMB, "authentication failed\n");
1513 return -EPERM;
1514 }
1515 }
1516
1517 /*
1518 * If session state is SMB2_SESSION_VALID, We can assume
1519 * that it is reauthentication. And the user/password
1520 * has been verified, so return it here.
1521 */
1522 if (sess->state == SMB2_SESSION_VALID) {
1523 if (conn->binding)
1524 goto binding_session;
1525 return 0;
1526 }
1527
1528 if ((rsp->SessionFlags != SMB2_SESSION_FLAG_IS_GUEST_LE &&
1529 (conn->sign || server_conf.enforced_signing)) ||
1530 (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED))
1531 sess->sign = true;
1532
1533 if (smb3_encryption_negotiated(conn) &&
1534 !(req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) {
1535 rc = conn->ops->generate_encryptionkey(conn, sess);
1536 if (rc) {
1537 ksmbd_debug(SMB,
1538 "SMB3 encryption key generation failed\n");
1539 return -EINVAL;
1540 }
1541 sess->enc = true;
1542 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION)
1543 rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE;
1544 /*
1545 * signing is disable if encryption is enable
1546 * on this session
1547 */
1548 sess->sign = false;
1549 }
1550
1551 binding_session:
1552 if (conn->dialect >= SMB30_PROT_ID) {
1553 chann = lookup_chann_list(sess, conn);
1554 if (!chann) {
1555 chann = kmalloc(sizeof(struct channel), GFP_KERNEL);
1556 if (!chann)
1557 return -ENOMEM;
1558
1559 chann->conn = conn;
1560 xa_store(&sess->ksmbd_chann_list, (long)conn, chann, GFP_KERNEL);
1561 }
1562 }
1563
1564 if (conn->ops->generate_signingkey) {
1565 rc = conn->ops->generate_signingkey(sess, conn);
1566 if (rc) {
1567 ksmbd_debug(SMB, "SMB3 signing key generation failed\n");
1568 return -EINVAL;
1569 }
1570 }
1571
1572 if (!ksmbd_conn_lookup_dialect(conn)) {
1573 pr_err("fail to verify the dialect\n");
1574 return -ENOENT;
1575 }
1576 return 0;
1577 }
1578
1579 #ifdef CONFIG_SMB_SERVER_KERBEROS5
1580 static int krb5_authenticate(struct ksmbd_work *work,
1581 struct smb2_sess_setup_req *req,
1582 struct smb2_sess_setup_rsp *rsp)
1583 {
1584 struct ksmbd_conn *conn = work->conn;
1585 struct ksmbd_session *sess = work->sess;
1586 char *in_blob, *out_blob;
1587 struct channel *chann = NULL;
1588 u64 prev_sess_id;
1589 int in_len, out_len;
1590 int retval;
1591
1592 in_blob = (char *)&req->hdr.ProtocolId +
1593 le16_to_cpu(req->SecurityBufferOffset);
1594 in_len = le16_to_cpu(req->SecurityBufferLength);
1595 out_blob = (char *)&rsp->hdr.ProtocolId +
1596 le16_to_cpu(rsp->SecurityBufferOffset);
1597 out_len = work->response_sz -
1598 (le16_to_cpu(rsp->SecurityBufferOffset) + 4);
1599
1600 /* Check previous session */
1601 prev_sess_id = le64_to_cpu(req->PreviousSessionId);
1602 if (prev_sess_id && prev_sess_id != sess->id)
1603 destroy_previous_session(conn, sess->user, prev_sess_id);
1604
1605 if (sess->state == SMB2_SESSION_VALID)
1606 ksmbd_free_user(sess->user);
1607
1608 retval = ksmbd_krb5_authenticate(sess, in_blob, in_len,
1609 out_blob, &out_len);
1610 if (retval) {
1611 ksmbd_debug(SMB, "krb5 authentication failed\n");
1612 return -EINVAL;
1613 }
1614 rsp->SecurityBufferLength = cpu_to_le16(out_len);
1615
1616 if ((conn->sign || server_conf.enforced_signing) ||
1617 (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED))
1618 sess->sign = true;
1619
1620 if (smb3_encryption_negotiated(conn)) {
1621 retval = conn->ops->generate_encryptionkey(conn, sess);
1622 if (retval) {
1623 ksmbd_debug(SMB,
1624 "SMB3 encryption key generation failed\n");
1625 return -EINVAL;
1626 }
1627 sess->enc = true;
1628 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION)
1629 rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE;
1630 sess->sign = false;
1631 }
1632
1633 if (conn->dialect >= SMB30_PROT_ID) {
1634 chann = lookup_chann_list(sess, conn);
1635 if (!chann) {
1636 chann = kmalloc(sizeof(struct channel), GFP_KERNEL);
1637 if (!chann)
1638 return -ENOMEM;
1639
1640 chann->conn = conn;
1641 xa_store(&sess->ksmbd_chann_list, (long)conn, chann, GFP_KERNEL);
1642 }
1643 }
1644
1645 if (conn->ops->generate_signingkey) {
1646 retval = conn->ops->generate_signingkey(sess, conn);
1647 if (retval) {
1648 ksmbd_debug(SMB, "SMB3 signing key generation failed\n");
1649 return -EINVAL;
1650 }
1651 }
1652
1653 if (!ksmbd_conn_lookup_dialect(conn)) {
1654 pr_err("fail to verify the dialect\n");
1655 return -ENOENT;
1656 }
1657 return 0;
1658 }
1659 #else
1660 static int krb5_authenticate(struct ksmbd_work *work,
1661 struct smb2_sess_setup_req *req,
1662 struct smb2_sess_setup_rsp *rsp)
1663 {
1664 return -EOPNOTSUPP;
1665 }
1666 #endif
1667
1668 int smb2_sess_setup(struct ksmbd_work *work)
1669 {
1670 struct ksmbd_conn *conn = work->conn;
1671 struct smb2_sess_setup_req *req;
1672 struct smb2_sess_setup_rsp *rsp;
1673 struct ksmbd_session *sess;
1674 struct negotiate_message *negblob;
1675 unsigned int negblob_len, negblob_off;
1676 int rc = 0;
1677
1678 ksmbd_debug(SMB, "Received request for session setup\n");
1679
1680 WORK_BUFFERS(work, req, rsp);
1681
1682 rsp->StructureSize = cpu_to_le16(9);
1683 rsp->SessionFlags = 0;
1684 rsp->SecurityBufferOffset = cpu_to_le16(72);
1685 rsp->SecurityBufferLength = 0;
1686
1687 ksmbd_conn_lock(conn);
1688 if (!req->hdr.SessionId) {
1689 sess = ksmbd_smb2_session_create();
1690 if (!sess) {
1691 rc = -ENOMEM;
1692 goto out_err;
1693 }
1694 rsp->hdr.SessionId = cpu_to_le64(sess->id);
1695 rc = ksmbd_session_register(conn, sess);
1696 if (rc)
1697 goto out_err;
1698 } else if (conn->dialect >= SMB30_PROT_ID &&
1699 (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) &&
1700 req->Flags & SMB2_SESSION_REQ_FLAG_BINDING) {
1701 u64 sess_id = le64_to_cpu(req->hdr.SessionId);
1702
1703 sess = ksmbd_session_lookup_slowpath(sess_id);
1704 if (!sess) {
1705 rc = -ENOENT;
1706 goto out_err;
1707 }
1708
1709 if (conn->dialect != sess->dialect) {
1710 rc = -EINVAL;
1711 goto out_err;
1712 }
1713
1714 if (!(req->hdr.Flags & SMB2_FLAGS_SIGNED)) {
1715 rc = -EINVAL;
1716 goto out_err;
1717 }
1718
1719 if (strncmp(conn->ClientGUID, sess->ClientGUID,
1720 SMB2_CLIENT_GUID_SIZE)) {
1721 rc = -ENOENT;
1722 goto out_err;
1723 }
1724
1725 if (sess->state == SMB2_SESSION_IN_PROGRESS) {
1726 rc = -EACCES;
1727 goto out_err;
1728 }
1729
1730 if (sess->state == SMB2_SESSION_EXPIRED) {
1731 rc = -EFAULT;
1732 goto out_err;
1733 }
1734
1735 if (ksmbd_conn_need_reconnect(conn)) {
1736 rc = -EFAULT;
1737 sess = NULL;
1738 goto out_err;
1739 }
1740
1741 if (ksmbd_session_lookup(conn, sess_id)) {
1742 rc = -EACCES;
1743 goto out_err;
1744 }
1745
1746 if (user_guest(sess->user)) {
1747 rc = -EOPNOTSUPP;
1748 goto out_err;
1749 }
1750
1751 conn->binding = true;
1752 } else if ((conn->dialect < SMB30_PROT_ID ||
1753 server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) &&
1754 (req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) {
1755 sess = NULL;
1756 rc = -EACCES;
1757 goto out_err;
1758 } else {
1759 sess = ksmbd_session_lookup(conn,
1760 le64_to_cpu(req->hdr.SessionId));
1761 if (!sess) {
1762 rc = -ENOENT;
1763 goto out_err;
1764 }
1765
1766 if (sess->state == SMB2_SESSION_EXPIRED) {
1767 rc = -EFAULT;
1768 goto out_err;
1769 }
1770
1771 if (ksmbd_conn_need_reconnect(conn)) {
1772 rc = -EFAULT;
1773 sess = NULL;
1774 goto out_err;
1775 }
1776 }
1777 work->sess = sess;
1778
1779 negblob_off = le16_to_cpu(req->SecurityBufferOffset);
1780 negblob_len = le16_to_cpu(req->SecurityBufferLength);
1781 if (negblob_off < offsetof(struct smb2_sess_setup_req, Buffer) ||
1782 negblob_len < offsetof(struct negotiate_message, NegotiateFlags)) {
1783 rc = -EINVAL;
1784 goto out_err;
1785 }
1786
1787 negblob = (struct negotiate_message *)((char *)&req->hdr.ProtocolId +
1788 negblob_off);
1789
1790 if (decode_negotiation_token(conn, negblob, negblob_len) == 0) {
1791 if (conn->mechToken)
1792 negblob = (struct negotiate_message *)conn->mechToken;
1793 }
1794
1795 if (server_conf.auth_mechs & conn->auth_mechs) {
1796 rc = generate_preauth_hash(work);
1797 if (rc)
1798 goto out_err;
1799
1800 if (conn->preferred_auth_mech &
1801 (KSMBD_AUTH_KRB5 | KSMBD_AUTH_MSKRB5)) {
1802 rc = krb5_authenticate(work, req, rsp);
1803 if (rc) {
1804 rc = -EINVAL;
1805 goto out_err;
1806 }
1807
1808 if (!ksmbd_conn_need_reconnect(conn)) {
1809 ksmbd_conn_set_good(conn);
1810 sess->state = SMB2_SESSION_VALID;
1811 }
1812 kfree(sess->Preauth_HashValue);
1813 sess->Preauth_HashValue = NULL;
1814 } else if (conn->preferred_auth_mech == KSMBD_AUTH_NTLMSSP) {
1815 if (negblob->MessageType == NtLmNegotiate) {
1816 rc = ntlm_negotiate(work, negblob, negblob_len, rsp);
1817 if (rc)
1818 goto out_err;
1819 rsp->hdr.Status =
1820 STATUS_MORE_PROCESSING_REQUIRED;
1821 } else if (negblob->MessageType == NtLmAuthenticate) {
1822 rc = ntlm_authenticate(work, req, rsp);
1823 if (rc)
1824 goto out_err;
1825
1826 if (!ksmbd_conn_need_reconnect(conn)) {
1827 ksmbd_conn_set_good(conn);
1828 sess->state = SMB2_SESSION_VALID;
1829 }
1830 if (conn->binding) {
1831 struct preauth_session *preauth_sess;
1832
1833 preauth_sess =
1834 ksmbd_preauth_session_lookup(conn, sess->id);
1835 if (preauth_sess) {
1836 list_del(&preauth_sess->preauth_entry);
1837 kfree(preauth_sess);
1838 }
1839 }
1840 kfree(sess->Preauth_HashValue);
1841 sess->Preauth_HashValue = NULL;
1842 } else {
1843 pr_info_ratelimited("Unknown NTLMSSP message type : 0x%x\n",
1844 le32_to_cpu(negblob->MessageType));
1845 rc = -EINVAL;
1846 }
1847 } else {
1848 /* TODO: need one more negotiation */
1849 pr_err("Not support the preferred authentication\n");
1850 rc = -EINVAL;
1851 }
1852 } else {
1853 pr_err("Not support authentication\n");
1854 rc = -EINVAL;
1855 }
1856
1857 out_err:
1858 if (rc == -EINVAL)
1859 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1860 else if (rc == -ENOENT)
1861 rsp->hdr.Status = STATUS_USER_SESSION_DELETED;
1862 else if (rc == -EACCES)
1863 rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED;
1864 else if (rc == -EFAULT)
1865 rsp->hdr.Status = STATUS_NETWORK_SESSION_EXPIRED;
1866 else if (rc == -ENOMEM)
1867 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
1868 else if (rc == -EOPNOTSUPP)
1869 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
1870 else if (rc)
1871 rsp->hdr.Status = STATUS_LOGON_FAILURE;
1872
1873 if (conn->use_spnego && conn->mechToken) {
1874 kfree(conn->mechToken);
1875 conn->mechToken = NULL;
1876 }
1877
1878 if (rc < 0) {
1879 /*
1880 * SecurityBufferOffset should be set to zero
1881 * in session setup error response.
1882 */
1883 rsp->SecurityBufferOffset = 0;
1884
1885 if (sess) {
1886 bool try_delay = false;
1887
1888 /*
1889 * To avoid dictionary attacks (repeated session setups rapidly sent) to
1890 * connect to server, ksmbd make a delay of a 5 seconds on session setup
1891 * failure to make it harder to send enough random connection requests
1892 * to break into a server.
1893 */
1894 if (sess->user && sess->user->flags & KSMBD_USER_FLAG_DELAY_SESSION)
1895 try_delay = true;
1896
1897 sess->last_active = jiffies;
1898 sess->state = SMB2_SESSION_EXPIRED;
1899 if (try_delay) {
1900 ksmbd_conn_set_need_reconnect(conn);
1901 ssleep(5);
1902 ksmbd_conn_set_need_negotiate(conn);
1903 }
1904 }
1905 smb2_set_err_rsp(work);
1906 } else {
1907 unsigned int iov_len;
1908
1909 if (rsp->SecurityBufferLength)
1910 iov_len = offsetof(struct smb2_sess_setup_rsp, Buffer) +
1911 le16_to_cpu(rsp->SecurityBufferLength);
1912 else
1913 iov_len = sizeof(struct smb2_sess_setup_rsp);
1914 rc = ksmbd_iov_pin_rsp(work, rsp, iov_len);
1915 if (rc)
1916 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
1917 }
1918
1919 ksmbd_conn_unlock(conn);
1920 return rc;
1921 }
1922
1923 /**
1924 * smb2_tree_connect() - handler for smb2 tree connect command
1925 * @work: smb work containing smb request buffer
1926 *
1927 * Return: 0 on success, otherwise error
1928 */
1929 int smb2_tree_connect(struct ksmbd_work *work)
1930 {
1931 struct ksmbd_conn *conn = work->conn;
1932 struct smb2_tree_connect_req *req;
1933 struct smb2_tree_connect_rsp *rsp;
1934 struct ksmbd_session *sess = work->sess;
1935 char *treename = NULL, *name = NULL;
1936 struct ksmbd_tree_conn_status status;
1937 struct ksmbd_share_config *share;
1938 int rc = -EINVAL;
1939
1940 WORK_BUFFERS(work, req, rsp);
1941
1942 treename = smb_strndup_from_utf16(req->Buffer,
1943 le16_to_cpu(req->PathLength), true,
1944 conn->local_nls);
1945 if (IS_ERR(treename)) {
1946 pr_err("treename is NULL\n");
1947 status.ret = KSMBD_TREE_CONN_STATUS_ERROR;
1948 goto out_err1;
1949 }
1950
1951 name = ksmbd_extract_sharename(conn->um, treename);
1952 if (IS_ERR(name)) {
1953 status.ret = KSMBD_TREE_CONN_STATUS_ERROR;
1954 goto out_err1;
1955 }
1956
1957 ksmbd_debug(SMB, "tree connect request for tree %s treename %s\n",
1958 name, treename);
1959
1960 status = ksmbd_tree_conn_connect(conn, sess, name);
1961 if (status.ret == KSMBD_TREE_CONN_STATUS_OK)
1962 rsp->hdr.Id.SyncId.TreeId = cpu_to_le32(status.tree_conn->id);
1963 else
1964 goto out_err1;
1965
1966 share = status.tree_conn->share_conf;
1967 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) {
1968 ksmbd_debug(SMB, "IPC share path request\n");
1969 rsp->ShareType = SMB2_SHARE_TYPE_PIPE;
1970 rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE |
1971 FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE |
1972 FILE_DELETE_LE | FILE_READ_CONTROL_LE |
1973 FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE |
1974 FILE_SYNCHRONIZE_LE;
1975 } else {
1976 rsp->ShareType = SMB2_SHARE_TYPE_DISK;
1977 rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE |
1978 FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE;
1979 if (test_tree_conn_flag(status.tree_conn,
1980 KSMBD_TREE_CONN_FLAG_WRITABLE)) {
1981 rsp->MaximalAccess |= FILE_WRITE_DATA_LE |
1982 FILE_APPEND_DATA_LE | FILE_WRITE_EA_LE |
1983 FILE_DELETE_LE | FILE_WRITE_ATTRIBUTES_LE |
1984 FILE_DELETE_CHILD_LE | FILE_READ_CONTROL_LE |
1985 FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE |
1986 FILE_SYNCHRONIZE_LE;
1987 }
1988 }
1989
1990 status.tree_conn->maximal_access = le32_to_cpu(rsp->MaximalAccess);
1991 if (conn->posix_ext_supported)
1992 status.tree_conn->posix_extensions = true;
1993
1994 write_lock(&sess->tree_conns_lock);
1995 status.tree_conn->t_state = TREE_CONNECTED;
1996 write_unlock(&sess->tree_conns_lock);
1997 rsp->StructureSize = cpu_to_le16(16);
1998 out_err1:
1999 rsp->Capabilities = 0;
2000 rsp->Reserved = 0;
2001 /* default manual caching */
2002 rsp->ShareFlags = SMB2_SHAREFLAG_MANUAL_CACHING;
2003
2004 rc = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_tree_connect_rsp));
2005 if (rc)
2006 status.ret = KSMBD_TREE_CONN_STATUS_NOMEM;
2007
2008 if (!IS_ERR(treename))
2009 kfree(treename);
2010 if (!IS_ERR(name))
2011 kfree(name);
2012
2013 switch (status.ret) {
2014 case KSMBD_TREE_CONN_STATUS_OK:
2015 rsp->hdr.Status = STATUS_SUCCESS;
2016 rc = 0;
2017 break;
2018 case -ESTALE:
2019 case -ENOENT:
2020 case KSMBD_TREE_CONN_STATUS_NO_SHARE:
2021 rsp->hdr.Status = STATUS_BAD_NETWORK_NAME;
2022 break;
2023 case -ENOMEM:
2024 case KSMBD_TREE_CONN_STATUS_NOMEM:
2025 rsp->hdr.Status = STATUS_NO_MEMORY;
2026 break;
2027 case KSMBD_TREE_CONN_STATUS_ERROR:
2028 case KSMBD_TREE_CONN_STATUS_TOO_MANY_CONNS:
2029 case KSMBD_TREE_CONN_STATUS_TOO_MANY_SESSIONS:
2030 rsp->hdr.Status = STATUS_ACCESS_DENIED;
2031 break;
2032 case -EINVAL:
2033 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2034 break;
2035 default:
2036 rsp->hdr.Status = STATUS_ACCESS_DENIED;
2037 }
2038
2039 if (status.ret != KSMBD_TREE_CONN_STATUS_OK)
2040 smb2_set_err_rsp(work);
2041
2042 return rc;
2043 }
2044
2045 /**
2046 * smb2_create_open_flags() - convert smb open flags to unix open flags
2047 * @file_present: is file already present
2048 * @access: file access flags
2049 * @disposition: file disposition flags
2050 * @may_flags: set with MAY_ flags
2051 *
2052 * Return: file open flags
2053 */
2054 static int smb2_create_open_flags(bool file_present, __le32 access,
2055 __le32 disposition,
2056 int *may_flags)
2057 {
2058 int oflags = O_NONBLOCK | O_LARGEFILE;
2059
2060 if (access & FILE_READ_DESIRED_ACCESS_LE &&
2061 access & FILE_WRITE_DESIRE_ACCESS_LE) {
2062 oflags |= O_RDWR;
2063 *may_flags = MAY_OPEN | MAY_READ | MAY_WRITE;
2064 } else if (access & FILE_WRITE_DESIRE_ACCESS_LE) {
2065 oflags |= O_WRONLY;
2066 *may_flags = MAY_OPEN | MAY_WRITE;
2067 } else {
2068 oflags |= O_RDONLY;
2069 *may_flags = MAY_OPEN | MAY_READ;
2070 }
2071
2072 if (access == FILE_READ_ATTRIBUTES_LE)
2073 oflags |= O_PATH;
2074
2075 if (file_present) {
2076 switch (disposition & FILE_CREATE_MASK_LE) {
2077 case FILE_OPEN_LE:
2078 case FILE_CREATE_LE:
2079 break;
2080 case FILE_SUPERSEDE_LE:
2081 case FILE_OVERWRITE_LE:
2082 case FILE_OVERWRITE_IF_LE:
2083 oflags |= O_TRUNC;
2084 break;
2085 default:
2086 break;
2087 }
2088 } else {
2089 switch (disposition & FILE_CREATE_MASK_LE) {
2090 case FILE_SUPERSEDE_LE:
2091 case FILE_CREATE_LE:
2092 case FILE_OPEN_IF_LE:
2093 case FILE_OVERWRITE_IF_LE:
2094 oflags |= O_CREAT;
2095 break;
2096 case FILE_OPEN_LE:
2097 case FILE_OVERWRITE_LE:
2098 oflags &= ~O_CREAT;
2099 break;
2100 default:
2101 break;
2102 }
2103 }
2104
2105 return oflags;
2106 }
2107
2108 /**
2109 * smb2_tree_disconnect() - handler for smb tree connect request
2110 * @work: smb work containing request buffer
2111 *
2112 * Return: 0
2113 */
2114 int smb2_tree_disconnect(struct ksmbd_work *work)
2115 {
2116 struct smb2_tree_disconnect_rsp *rsp;
2117 struct smb2_tree_disconnect_req *req;
2118 struct ksmbd_session *sess = work->sess;
2119 struct ksmbd_tree_connect *tcon = work->tcon;
2120 int err;
2121
2122 WORK_BUFFERS(work, req, rsp);
2123
2124 ksmbd_debug(SMB, "request\n");
2125
2126 if (!tcon) {
2127 ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId);
2128
2129 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2130 err = -ENOENT;
2131 goto err_out;
2132 }
2133
2134 ksmbd_close_tree_conn_fds(work);
2135
2136 write_lock(&sess->tree_conns_lock);
2137 if (tcon->t_state == TREE_DISCONNECTED) {
2138 write_unlock(&sess->tree_conns_lock);
2139 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2140 err = -ENOENT;
2141 goto err_out;
2142 }
2143
2144 WARN_ON_ONCE(atomic_dec_and_test(&tcon->refcount));
2145 tcon->t_state = TREE_DISCONNECTED;
2146 write_unlock(&sess->tree_conns_lock);
2147
2148 err = ksmbd_tree_conn_disconnect(sess, tcon);
2149 if (err) {
2150 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2151 goto err_out;
2152 }
2153
2154 work->tcon = NULL;
2155
2156 rsp->StructureSize = cpu_to_le16(4);
2157 err = ksmbd_iov_pin_rsp(work, rsp,
2158 sizeof(struct smb2_tree_disconnect_rsp));
2159 if (err) {
2160 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
2161 goto err_out;
2162 }
2163
2164 return 0;
2165
2166 err_out:
2167 smb2_set_err_rsp(work);
2168 return err;
2169
2170 }
2171
2172 /**
2173 * smb2_session_logoff() - handler for session log off request
2174 * @work: smb work containing request buffer
2175 *
2176 * Return: 0
2177 */
2178 int smb2_session_logoff(struct ksmbd_work *work)
2179 {
2180 struct ksmbd_conn *conn = work->conn;
2181 struct smb2_logoff_req *req;
2182 struct smb2_logoff_rsp *rsp;
2183 struct ksmbd_session *sess;
2184 u64 sess_id;
2185 int err;
2186
2187 WORK_BUFFERS(work, req, rsp);
2188
2189 ksmbd_debug(SMB, "request\n");
2190
2191 ksmbd_conn_lock(conn);
2192 if (!ksmbd_conn_good(conn)) {
2193 ksmbd_conn_unlock(conn);
2194 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2195 smb2_set_err_rsp(work);
2196 return -ENOENT;
2197 }
2198 sess_id = le64_to_cpu(req->hdr.SessionId);
2199 ksmbd_all_conn_set_status(sess_id, KSMBD_SESS_NEED_RECONNECT);
2200 ksmbd_conn_unlock(conn);
2201
2202 ksmbd_close_session_fds(work);
2203 ksmbd_conn_wait_idle(conn, sess_id);
2204
2205 /*
2206 * Re-lookup session to validate if session is deleted
2207 * while waiting request complete
2208 */
2209 sess = ksmbd_session_lookup_all(conn, sess_id);
2210 if (ksmbd_tree_conn_session_logoff(sess)) {
2211 ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId);
2212 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2213 smb2_set_err_rsp(work);
2214 return -ENOENT;
2215 }
2216
2217 ksmbd_destroy_file_table(&sess->file_table);
2218 sess->state = SMB2_SESSION_EXPIRED;
2219
2220 ksmbd_free_user(sess->user);
2221 sess->user = NULL;
2222 ksmbd_all_conn_set_status(sess_id, KSMBD_SESS_NEED_NEGOTIATE);
2223
2224 rsp->StructureSize = cpu_to_le16(4);
2225 err = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_logoff_rsp));
2226 if (err) {
2227 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
2228 smb2_set_err_rsp(work);
2229 return err;
2230 }
2231 return 0;
2232 }
2233
2234 /**
2235 * create_smb2_pipe() - create IPC pipe
2236 * @work: smb work containing request buffer
2237 *
2238 * Return: 0 on success, otherwise error
2239 */
2240 static noinline int create_smb2_pipe(struct ksmbd_work *work)
2241 {
2242 struct smb2_create_rsp *rsp;
2243 struct smb2_create_req *req;
2244 int id;
2245 int err;
2246 char *name;
2247
2248 WORK_BUFFERS(work, req, rsp);
2249
2250 name = smb_strndup_from_utf16(req->Buffer, le16_to_cpu(req->NameLength),
2251 1, work->conn->local_nls);
2252 if (IS_ERR(name)) {
2253 rsp->hdr.Status = STATUS_NO_MEMORY;
2254 err = PTR_ERR(name);
2255 goto out;
2256 }
2257
2258 id = ksmbd_session_rpc_open(work->sess, name);
2259 if (id < 0) {
2260 pr_err("Unable to open RPC pipe: %d\n", id);
2261 err = id;
2262 goto out;
2263 }
2264
2265 rsp->hdr.Status = STATUS_SUCCESS;
2266 rsp->StructureSize = cpu_to_le16(89);
2267 rsp->OplockLevel = SMB2_OPLOCK_LEVEL_NONE;
2268 rsp->Flags = 0;
2269 rsp->CreateAction = cpu_to_le32(FILE_OPENED);
2270
2271 rsp->CreationTime = cpu_to_le64(0);
2272 rsp->LastAccessTime = cpu_to_le64(0);
2273 rsp->ChangeTime = cpu_to_le64(0);
2274 rsp->AllocationSize = cpu_to_le64(0);
2275 rsp->EndofFile = cpu_to_le64(0);
2276 rsp->FileAttributes = FILE_ATTRIBUTE_NORMAL_LE;
2277 rsp->Reserved2 = 0;
2278 rsp->VolatileFileId = id;
2279 rsp->PersistentFileId = 0;
2280 rsp->CreateContextsOffset = 0;
2281 rsp->CreateContextsLength = 0;
2282
2283 err = ksmbd_iov_pin_rsp(work, rsp, offsetof(struct smb2_create_rsp, Buffer));
2284 if (err)
2285 goto out;
2286
2287 kfree(name);
2288 return 0;
2289
2290 out:
2291 switch (err) {
2292 case -EINVAL:
2293 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2294 break;
2295 case -ENOSPC:
2296 case -ENOMEM:
2297 rsp->hdr.Status = STATUS_NO_MEMORY;
2298 break;
2299 }
2300
2301 if (!IS_ERR(name))
2302 kfree(name);
2303
2304 smb2_set_err_rsp(work);
2305 return err;
2306 }
2307
2308 /**
2309 * smb2_set_ea() - handler for setting extended attributes using set
2310 * info command
2311 * @eabuf: set info command buffer
2312 * @buf_len: set info command buffer length
2313 * @path: dentry path for get ea
2314 *
2315 * Return: 0 on success, otherwise error
2316 */
2317 static int smb2_set_ea(struct smb2_ea_info *eabuf, unsigned int buf_len,
2318 const struct path *path)
2319 {
2320 struct mnt_idmap *idmap = mnt_idmap(path->mnt);
2321 char *attr_name = NULL, *value;
2322 int rc = 0;
2323 unsigned int next = 0;
2324
2325 if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength +
2326 le16_to_cpu(eabuf->EaValueLength))
2327 return -EINVAL;
2328
2329 attr_name = kmalloc(XATTR_NAME_MAX + 1, GFP_KERNEL);
2330 if (!attr_name)
2331 return -ENOMEM;
2332
2333 do {
2334 if (!eabuf->EaNameLength)
2335 goto next;
2336
2337 ksmbd_debug(SMB,
2338 "name : <%s>, name_len : %u, value_len : %u, next : %u\n",
2339 eabuf->name, eabuf->EaNameLength,
2340 le16_to_cpu(eabuf->EaValueLength),
2341 le32_to_cpu(eabuf->NextEntryOffset));
2342
2343 if (eabuf->EaNameLength >
2344 (XATTR_NAME_MAX - XATTR_USER_PREFIX_LEN)) {
2345 rc = -EINVAL;
2346 break;
2347 }
2348
2349 memcpy(attr_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN);
2350 memcpy(&attr_name[XATTR_USER_PREFIX_LEN], eabuf->name,
2351 eabuf->EaNameLength);
2352 attr_name[XATTR_USER_PREFIX_LEN + eabuf->EaNameLength] = '\0';
2353 value = (char *)&eabuf->name + eabuf->EaNameLength + 1;
2354
2355 if (!eabuf->EaValueLength) {
2356 rc = ksmbd_vfs_casexattr_len(idmap,
2357 path->dentry,
2358 attr_name,
2359 XATTR_USER_PREFIX_LEN +
2360 eabuf->EaNameLength);
2361
2362 /* delete the EA only when it exits */
2363 if (rc > 0) {
2364 rc = ksmbd_vfs_remove_xattr(idmap,
2365 path,
2366 attr_name);
2367
2368 if (rc < 0) {
2369 ksmbd_debug(SMB,
2370 "remove xattr failed(%d)\n",
2371 rc);
2372 break;
2373 }
2374 }
2375
2376 /* if the EA doesn't exist, just do nothing. */
2377 rc = 0;
2378 } else {
2379 rc = ksmbd_vfs_setxattr(idmap, path, attr_name, value,
2380 le16_to_cpu(eabuf->EaValueLength),
2381 0, true);
2382 if (rc < 0) {
2383 ksmbd_debug(SMB,
2384 "ksmbd_vfs_setxattr is failed(%d)\n",
2385 rc);
2386 break;
2387 }
2388 }
2389
2390 next:
2391 next = le32_to_cpu(eabuf->NextEntryOffset);
2392 if (next == 0 || buf_len < next)
2393 break;
2394 buf_len -= next;
2395 eabuf = (struct smb2_ea_info *)((char *)eabuf + next);
2396 if (buf_len < sizeof(struct smb2_ea_info)) {
2397 rc = -EINVAL;
2398 break;
2399 }
2400
2401 if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength +
2402 le16_to_cpu(eabuf->EaValueLength)) {
2403 rc = -EINVAL;
2404 break;
2405 }
2406 } while (next != 0);
2407
2408 kfree(attr_name);
2409 return rc;
2410 }
2411
2412 static noinline int smb2_set_stream_name_xattr(const struct path *path,
2413 struct ksmbd_file *fp,
2414 char *stream_name, int s_type)
2415 {
2416 struct mnt_idmap *idmap = mnt_idmap(path->mnt);
2417 size_t xattr_stream_size;
2418 char *xattr_stream_name;
2419 int rc;
2420
2421 rc = ksmbd_vfs_xattr_stream_name(stream_name,
2422 &xattr_stream_name,
2423 &xattr_stream_size,
2424 s_type);
2425 if (rc)
2426 return rc;
2427
2428 fp->stream.name = xattr_stream_name;
2429 fp->stream.size = xattr_stream_size;
2430
2431 /* Check if there is stream prefix in xattr space */
2432 rc = ksmbd_vfs_casexattr_len(idmap,
2433 path->dentry,
2434 xattr_stream_name,
2435 xattr_stream_size);
2436 if (rc >= 0)
2437 return 0;
2438
2439 if (fp->cdoption == FILE_OPEN_LE) {
2440 ksmbd_debug(SMB, "XATTR stream name lookup failed: %d\n", rc);
2441 return -EBADF;
2442 }
2443
2444 rc = ksmbd_vfs_setxattr(idmap, path, xattr_stream_name, NULL, 0, 0, false);
2445 if (rc < 0)
2446 pr_err("Failed to store XATTR stream name :%d\n", rc);
2447 return 0;
2448 }
2449
2450 static int smb2_remove_smb_xattrs(const struct path *path)
2451 {
2452 struct mnt_idmap *idmap = mnt_idmap(path->mnt);
2453 char *name, *xattr_list = NULL;
2454 ssize_t xattr_list_len;
2455 int err = 0;
2456
2457 xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
2458 if (xattr_list_len < 0) {
2459 goto out;
2460 } else if (!xattr_list_len) {
2461 ksmbd_debug(SMB, "empty xattr in the file\n");
2462 goto out;
2463 }
2464
2465 for (name = xattr_list; name - xattr_list < xattr_list_len;
2466 name += strlen(name) + 1) {
2467 ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name));
2468
2469 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN) &&
2470 !strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX,
2471 STREAM_PREFIX_LEN)) {
2472 err = ksmbd_vfs_remove_xattr(idmap, path,
2473 name);
2474 if (err)
2475 ksmbd_debug(SMB, "remove xattr failed : %s\n",
2476 name);
2477 }
2478 }
2479 out:
2480 kvfree(xattr_list);
2481 return err;
2482 }
2483
2484 static int smb2_create_truncate(const struct path *path)
2485 {
2486 int rc = vfs_truncate(path, 0);
2487
2488 if (rc) {
2489 pr_err("vfs_truncate failed, rc %d\n", rc);
2490 return rc;
2491 }
2492
2493 rc = smb2_remove_smb_xattrs(path);
2494 if (rc == -EOPNOTSUPP)
2495 rc = 0;
2496 if (rc)
2497 ksmbd_debug(SMB,
2498 "ksmbd_truncate_stream_name_xattr failed, rc %d\n",
2499 rc);
2500 return rc;
2501 }
2502
2503 static void smb2_new_xattrs(struct ksmbd_tree_connect *tcon, const struct path *path,
2504 struct ksmbd_file *fp)
2505 {
2506 struct xattr_dos_attrib da = {0};
2507 int rc;
2508
2509 if (!test_share_config_flag(tcon->share_conf,
2510 KSMBD_SHARE_FLAG_STORE_DOS_ATTRS))
2511 return;
2512
2513 da.version = 4;
2514 da.attr = le32_to_cpu(fp->f_ci->m_fattr);
2515 da.itime = da.create_time = fp->create_time;
2516 da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME |
2517 XATTR_DOSINFO_ITIME;
2518
2519 rc = ksmbd_vfs_set_dos_attrib_xattr(mnt_idmap(path->mnt), path, &da, true);
2520 if (rc)
2521 ksmbd_debug(SMB, "failed to store file attribute into xattr\n");
2522 }
2523
2524 static void smb2_update_xattrs(struct ksmbd_tree_connect *tcon,
2525 const struct path *path, struct ksmbd_file *fp)
2526 {
2527 struct xattr_dos_attrib da;
2528 int rc;
2529
2530 fp->f_ci->m_fattr &= ~(FILE_ATTRIBUTE_HIDDEN_LE | FILE_ATTRIBUTE_SYSTEM_LE);
2531
2532 /* get FileAttributes from XATTR_NAME_DOS_ATTRIBUTE */
2533 if (!test_share_config_flag(tcon->share_conf,
2534 KSMBD_SHARE_FLAG_STORE_DOS_ATTRS))
2535 return;
2536
2537 rc = ksmbd_vfs_get_dos_attrib_xattr(mnt_idmap(path->mnt),
2538 path->dentry, &da);
2539 if (rc > 0) {
2540 fp->f_ci->m_fattr = cpu_to_le32(da.attr);
2541 fp->create_time = da.create_time;
2542 fp->itime = da.itime;
2543 }
2544 }
2545
2546 static int smb2_creat(struct ksmbd_work *work, struct path *parent_path,
2547 struct path *path, char *name, int open_flags,
2548 umode_t posix_mode, bool is_dir)
2549 {
2550 struct ksmbd_tree_connect *tcon = work->tcon;
2551 struct ksmbd_share_config *share = tcon->share_conf;
2552 umode_t mode;
2553 int rc;
2554
2555 if (!(open_flags & O_CREAT))
2556 return -EBADF;
2557
2558 ksmbd_debug(SMB, "file does not exist, so creating\n");
2559 if (is_dir == true) {
2560 ksmbd_debug(SMB, "creating directory\n");
2561
2562 mode = share_config_directory_mode(share, posix_mode);
2563 rc = ksmbd_vfs_mkdir(work, name, mode);
2564 if (rc)
2565 return rc;
2566 } else {
2567 ksmbd_debug(SMB, "creating regular file\n");
2568
2569 mode = share_config_create_mode(share, posix_mode);
2570 rc = ksmbd_vfs_create(work, name, mode);
2571 if (rc)
2572 return rc;
2573 }
2574
2575 rc = ksmbd_vfs_kern_path_locked(work, name, 0, parent_path, path, 0);
2576 if (rc) {
2577 pr_err("cannot get linux path (%s), err = %d\n",
2578 name, rc);
2579 return rc;
2580 }
2581 return 0;
2582 }
2583
2584 static int smb2_create_sd_buffer(struct ksmbd_work *work,
2585 struct smb2_create_req *req,
2586 const struct path *path)
2587 {
2588 struct create_context *context;
2589 struct create_sd_buf_req *sd_buf;
2590
2591 if (!req->CreateContextsOffset)
2592 return -ENOENT;
2593
2594 /* Parse SD BUFFER create contexts */
2595 context = smb2_find_context_vals(req, SMB2_CREATE_SD_BUFFER, 4);
2596 if (!context)
2597 return -ENOENT;
2598 else if (IS_ERR(context))
2599 return PTR_ERR(context);
2600
2601 ksmbd_debug(SMB,
2602 "Set ACLs using SMB2_CREATE_SD_BUFFER context\n");
2603 sd_buf = (struct create_sd_buf_req *)context;
2604 if (le16_to_cpu(context->DataOffset) +
2605 le32_to_cpu(context->DataLength) <
2606 sizeof(struct create_sd_buf_req))
2607 return -EINVAL;
2608 return set_info_sec(work->conn, work->tcon, path, &sd_buf->ntsd,
2609 le32_to_cpu(sd_buf->ccontext.DataLength), true, false);
2610 }
2611
2612 static void ksmbd_acls_fattr(struct smb_fattr *fattr,
2613 struct mnt_idmap *idmap,
2614 struct inode *inode)
2615 {
2616 vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode);
2617 vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode);
2618
2619 fattr->cf_uid = vfsuid_into_kuid(vfsuid);
2620 fattr->cf_gid = vfsgid_into_kgid(vfsgid);
2621 fattr->cf_mode = inode->i_mode;
2622 fattr->cf_acls = NULL;
2623 fattr->cf_dacls = NULL;
2624
2625 if (IS_ENABLED(CONFIG_FS_POSIX_ACL)) {
2626 fattr->cf_acls = get_inode_acl(inode, ACL_TYPE_ACCESS);
2627 if (S_ISDIR(inode->i_mode))
2628 fattr->cf_dacls = get_inode_acl(inode, ACL_TYPE_DEFAULT);
2629 }
2630 }
2631
2632 /**
2633 * smb2_open() - handler for smb file open request
2634 * @work: smb work containing request buffer
2635 *
2636 * Return: 0 on success, otherwise error
2637 */
2638 int smb2_open(struct ksmbd_work *work)
2639 {
2640 struct ksmbd_conn *conn = work->conn;
2641 struct ksmbd_session *sess = work->sess;
2642 struct ksmbd_tree_connect *tcon = work->tcon;
2643 struct smb2_create_req *req;
2644 struct smb2_create_rsp *rsp;
2645 struct path path, parent_path;
2646 struct ksmbd_share_config *share = tcon->share_conf;
2647 struct ksmbd_file *fp = NULL;
2648 struct file *filp = NULL;
2649 struct mnt_idmap *idmap = NULL;
2650 struct kstat stat;
2651 struct create_context *context;
2652 struct lease_ctx_info *lc = NULL;
2653 struct create_ea_buf_req *ea_buf = NULL;
2654 struct oplock_info *opinfo;
2655 __le32 *next_ptr = NULL;
2656 int req_op_level = 0, open_flags = 0, may_flags = 0, file_info = 0;
2657 int rc = 0;
2658 int contxt_cnt = 0, query_disk_id = 0;
2659 int maximal_access_ctxt = 0, posix_ctxt = 0;
2660 int s_type = 0;
2661 int next_off = 0;
2662 char *name = NULL;
2663 char *stream_name = NULL;
2664 bool file_present = false, created = false, already_permitted = false;
2665 int share_ret, need_truncate = 0;
2666 u64 time;
2667 umode_t posix_mode = 0;
2668 __le32 daccess, maximal_access = 0;
2669 int iov_len = 0;
2670
2671 WORK_BUFFERS(work, req, rsp);
2672
2673 if (req->hdr.NextCommand && !work->next_smb2_rcv_hdr_off &&
2674 (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)) {
2675 ksmbd_debug(SMB, "invalid flag in chained command\n");
2676 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2677 smb2_set_err_rsp(work);
2678 return -EINVAL;
2679 }
2680
2681 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) {
2682 ksmbd_debug(SMB, "IPC pipe create request\n");
2683 return create_smb2_pipe(work);
2684 }
2685
2686 if (req->NameLength) {
2687 if ((req->CreateOptions & FILE_DIRECTORY_FILE_LE) &&
2688 *(char *)req->Buffer == '\\') {
2689 pr_err("not allow directory name included leading slash\n");
2690 rc = -EINVAL;
2691 goto err_out2;
2692 }
2693
2694 name = smb2_get_name(req->Buffer,
2695 le16_to_cpu(req->NameLength),
2696 work->conn->local_nls);
2697 if (IS_ERR(name)) {
2698 rc = PTR_ERR(name);
2699 if (rc != -ENOMEM)
2700 rc = -ENOENT;
2701 name = NULL;
2702 goto err_out2;
2703 }
2704
2705 ksmbd_debug(SMB, "converted name = %s\n", name);
2706 if (strchr(name, ':')) {
2707 if (!test_share_config_flag(work->tcon->share_conf,
2708 KSMBD_SHARE_FLAG_STREAMS)) {
2709 rc = -EBADF;
2710 goto err_out2;
2711 }
2712 rc = parse_stream_name(name, &stream_name, &s_type);
2713 if (rc < 0)
2714 goto err_out2;
2715 }
2716
2717 rc = ksmbd_validate_filename(name);
2718 if (rc < 0)
2719 goto err_out2;
2720
2721 if (ksmbd_share_veto_filename(share, name)) {
2722 rc = -ENOENT;
2723 ksmbd_debug(SMB, "Reject open(), vetoed file: %s\n",
2724 name);
2725 goto err_out2;
2726 }
2727 } else {
2728 name = kstrdup("", GFP_KERNEL);
2729 if (!name) {
2730 rc = -ENOMEM;
2731 goto err_out2;
2732 }
2733 }
2734
2735 if (le32_to_cpu(req->ImpersonationLevel) > le32_to_cpu(IL_DELEGATE)) {
2736 pr_err("Invalid impersonationlevel : 0x%x\n",
2737 le32_to_cpu(req->ImpersonationLevel));
2738 rc = -EIO;
2739 rsp->hdr.Status = STATUS_BAD_IMPERSONATION_LEVEL;
2740 goto err_out2;
2741 }
2742
2743 if (req->CreateOptions && !(req->CreateOptions & CREATE_OPTIONS_MASK_LE)) {
2744 pr_err("Invalid create options : 0x%x\n",
2745 le32_to_cpu(req->CreateOptions));
2746 rc = -EINVAL;
2747 goto err_out2;
2748 } else {
2749 if (req->CreateOptions & FILE_SEQUENTIAL_ONLY_LE &&
2750 req->CreateOptions & FILE_RANDOM_ACCESS_LE)
2751 req->CreateOptions = ~(FILE_SEQUENTIAL_ONLY_LE);
2752
2753 if (req->CreateOptions &
2754 (FILE_OPEN_BY_FILE_ID_LE | CREATE_TREE_CONNECTION |
2755 FILE_RESERVE_OPFILTER_LE)) {
2756 rc = -EOPNOTSUPP;
2757 goto err_out2;
2758 }
2759
2760 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) {
2761 if (req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE) {
2762 rc = -EINVAL;
2763 goto err_out2;
2764 } else if (req->CreateOptions & FILE_NO_COMPRESSION_LE) {
2765 req->CreateOptions = ~(FILE_NO_COMPRESSION_LE);
2766 }
2767 }
2768 }
2769
2770 if (le32_to_cpu(req->CreateDisposition) >
2771 le32_to_cpu(FILE_OVERWRITE_IF_LE)) {
2772 pr_err("Invalid create disposition : 0x%x\n",
2773 le32_to_cpu(req->CreateDisposition));
2774 rc = -EINVAL;
2775 goto err_out2;
2776 }
2777
2778 if (!(req->DesiredAccess & DESIRED_ACCESS_MASK)) {
2779 pr_err("Invalid desired access : 0x%x\n",
2780 le32_to_cpu(req->DesiredAccess));
2781 rc = -EACCES;
2782 goto err_out2;
2783 }
2784
2785 if (req->FileAttributes && !(req->FileAttributes & FILE_ATTRIBUTE_MASK_LE)) {
2786 pr_err("Invalid file attribute : 0x%x\n",
2787 le32_to_cpu(req->FileAttributes));
2788 rc = -EINVAL;
2789 goto err_out2;
2790 }
2791
2792 if (req->CreateContextsOffset) {
2793 /* Parse non-durable handle create contexts */
2794 context = smb2_find_context_vals(req, SMB2_CREATE_EA_BUFFER, 4);
2795 if (IS_ERR(context)) {
2796 rc = PTR_ERR(context);
2797 goto err_out2;
2798 } else if (context) {
2799 ea_buf = (struct create_ea_buf_req *)context;
2800 if (le16_to_cpu(context->DataOffset) +
2801 le32_to_cpu(context->DataLength) <
2802 sizeof(struct create_ea_buf_req)) {
2803 rc = -EINVAL;
2804 goto err_out2;
2805 }
2806 if (req->CreateOptions & FILE_NO_EA_KNOWLEDGE_LE) {
2807 rsp->hdr.Status = STATUS_ACCESS_DENIED;
2808 rc = -EACCES;
2809 goto err_out2;
2810 }
2811 }
2812
2813 context = smb2_find_context_vals(req,
2814 SMB2_CREATE_QUERY_MAXIMAL_ACCESS_REQUEST, 4);
2815 if (IS_ERR(context)) {
2816 rc = PTR_ERR(context);
2817 goto err_out2;
2818 } else if (context) {
2819 ksmbd_debug(SMB,
2820 "get query maximal access context\n");
2821 maximal_access_ctxt = 1;
2822 }
2823
2824 context = smb2_find_context_vals(req,
2825 SMB2_CREATE_TIMEWARP_REQUEST, 4);
2826 if (IS_ERR(context)) {
2827 rc = PTR_ERR(context);
2828 goto err_out2;
2829 } else if (context) {
2830 ksmbd_debug(SMB, "get timewarp context\n");
2831 rc = -EBADF;
2832 goto err_out2;
2833 }
2834
2835 if (tcon->posix_extensions) {
2836 context = smb2_find_context_vals(req,
2837 SMB2_CREATE_TAG_POSIX, 16);
2838 if (IS_ERR(context)) {
2839 rc = PTR_ERR(context);
2840 goto err_out2;
2841 } else if (context) {
2842 struct create_posix *posix =
2843 (struct create_posix *)context;
2844 if (le16_to_cpu(context->DataOffset) +
2845 le32_to_cpu(context->DataLength) <
2846 sizeof(struct create_posix) - 4) {
2847 rc = -EINVAL;
2848 goto err_out2;
2849 }
2850 ksmbd_debug(SMB, "get posix context\n");
2851
2852 posix_mode = le32_to_cpu(posix->Mode);
2853 posix_ctxt = 1;
2854 }
2855 }
2856 }
2857
2858 if (ksmbd_override_fsids(work)) {
2859 rc = -ENOMEM;
2860 goto err_out2;
2861 }
2862
2863 rc = ksmbd_vfs_kern_path_locked(work, name, LOOKUP_NO_SYMLINKS,
2864 &parent_path, &path, 1);
2865 if (!rc) {
2866 file_present = true;
2867
2868 if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE) {
2869 /*
2870 * If file exists with under flags, return access
2871 * denied error.
2872 */
2873 if (req->CreateDisposition == FILE_OVERWRITE_IF_LE ||
2874 req->CreateDisposition == FILE_OPEN_IF_LE) {
2875 rc = -EACCES;
2876 goto err_out;
2877 }
2878
2879 if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
2880 ksmbd_debug(SMB,
2881 "User does not have write permission\n");
2882 rc = -EACCES;
2883 goto err_out;
2884 }
2885 } else if (d_is_symlink(path.dentry)) {
2886 rc = -EACCES;
2887 goto err_out;
2888 }
2889
2890 file_present = true;
2891 idmap = mnt_idmap(path.mnt);
2892 } else {
2893 if (rc != -ENOENT)
2894 goto err_out;
2895 ksmbd_debug(SMB, "can not get linux path for %s, rc = %d\n",
2896 name, rc);
2897 rc = 0;
2898 }
2899
2900 if (stream_name) {
2901 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) {
2902 if (s_type == DATA_STREAM) {
2903 rc = -EIO;
2904 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
2905 }
2906 } else {
2907 if (file_present && S_ISDIR(d_inode(path.dentry)->i_mode) &&
2908 s_type == DATA_STREAM) {
2909 rc = -EIO;
2910 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
2911 }
2912 }
2913
2914 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE &&
2915 req->FileAttributes & FILE_ATTRIBUTE_NORMAL_LE) {
2916 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
2917 rc = -EIO;
2918 }
2919
2920 if (rc < 0)
2921 goto err_out;
2922 }
2923
2924 if (file_present && req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE &&
2925 S_ISDIR(d_inode(path.dentry)->i_mode) &&
2926 !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
2927 ksmbd_debug(SMB, "open() argument is a directory: %s, %x\n",
2928 name, req->CreateOptions);
2929 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
2930 rc = -EIO;
2931 goto err_out;
2932 }
2933
2934 if (file_present && (req->CreateOptions & FILE_DIRECTORY_FILE_LE) &&
2935 !(req->CreateDisposition == FILE_CREATE_LE) &&
2936 !S_ISDIR(d_inode(path.dentry)->i_mode)) {
2937 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
2938 rc = -EIO;
2939 goto err_out;
2940 }
2941
2942 if (!stream_name && file_present &&
2943 req->CreateDisposition == FILE_CREATE_LE) {
2944 rc = -EEXIST;
2945 goto err_out;
2946 }
2947
2948 daccess = smb_map_generic_desired_access(req->DesiredAccess);
2949
2950 if (file_present && !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
2951 rc = smb_check_perm_dacl(conn, &path, &daccess,
2952 sess->user->uid);
2953 if (rc)
2954 goto err_out;
2955 }
2956
2957 if (daccess & FILE_MAXIMAL_ACCESS_LE) {
2958 if (!file_present) {
2959 daccess = cpu_to_le32(GENERIC_ALL_FLAGS);
2960 } else {
2961 ksmbd_vfs_query_maximal_access(idmap,
2962 path.dentry,
2963 &daccess);
2964 already_permitted = true;
2965 }
2966 maximal_access = daccess;
2967 }
2968
2969 open_flags = smb2_create_open_flags(file_present, daccess,
2970 req->CreateDisposition,
2971 &may_flags);
2972
2973 if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
2974 if (open_flags & O_CREAT) {
2975 ksmbd_debug(SMB,
2976 "User does not have write permission\n");
2977 rc = -EACCES;
2978 goto err_out;
2979 }
2980 }
2981
2982 /*create file if not present */
2983 if (!file_present) {
2984 rc = smb2_creat(work, &parent_path, &path, name, open_flags,
2985 posix_mode,
2986 req->CreateOptions & FILE_DIRECTORY_FILE_LE);
2987 if (rc) {
2988 if (rc == -ENOENT) {
2989 rc = -EIO;
2990 rsp->hdr.Status = STATUS_OBJECT_PATH_NOT_FOUND;
2991 }
2992 goto err_out;
2993 }
2994
2995 created = true;
2996 idmap = mnt_idmap(path.mnt);
2997 if (ea_buf) {
2998 if (le32_to_cpu(ea_buf->ccontext.DataLength) <
2999 sizeof(struct smb2_ea_info)) {
3000 rc = -EINVAL;
3001 goto err_out;
3002 }
3003
3004 rc = smb2_set_ea(&ea_buf->ea,
3005 le32_to_cpu(ea_buf->ccontext.DataLength),
3006 &path);
3007 if (rc == -EOPNOTSUPP)
3008 rc = 0;
3009 else if (rc)
3010 goto err_out;
3011 }
3012 } else if (!already_permitted) {
3013 /* FILE_READ_ATTRIBUTE is allowed without inode_permission,
3014 * because execute(search) permission on a parent directory,
3015 * is already granted.
3016 */
3017 if (daccess & ~(FILE_READ_ATTRIBUTES_LE | FILE_READ_CONTROL_LE)) {
3018 rc = inode_permission(idmap,
3019 d_inode(path.dentry),
3020 may_flags);
3021 if (rc)
3022 goto err_out;
3023
3024 if ((daccess & FILE_DELETE_LE) ||
3025 (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
3026 rc = inode_permission(idmap,
3027 d_inode(path.dentry->d_parent),
3028 MAY_EXEC | MAY_WRITE);
3029 if (rc)
3030 goto err_out;
3031 }
3032 }
3033 }
3034
3035 rc = ksmbd_query_inode_status(path.dentry->d_parent);
3036 if (rc == KSMBD_INODE_STATUS_PENDING_DELETE) {
3037 rc = -EBUSY;
3038 goto err_out;
3039 }
3040
3041 rc = 0;
3042 filp = dentry_open(&path, open_flags, current_cred());
3043 if (IS_ERR(filp)) {
3044 rc = PTR_ERR(filp);
3045 pr_err("dentry open for dir failed, rc %d\n", rc);
3046 goto err_out;
3047 }
3048
3049 if (file_present) {
3050 if (!(open_flags & O_TRUNC))
3051 file_info = FILE_OPENED;
3052 else
3053 file_info = FILE_OVERWRITTEN;
3054
3055 if ((req->CreateDisposition & FILE_CREATE_MASK_LE) ==
3056 FILE_SUPERSEDE_LE)
3057 file_info = FILE_SUPERSEDED;
3058 } else if (open_flags & O_CREAT) {
3059 file_info = FILE_CREATED;
3060 }
3061
3062 ksmbd_vfs_set_fadvise(filp, req->CreateOptions);
3063
3064 /* Obtain Volatile-ID */
3065 fp = ksmbd_open_fd(work, filp);
3066 if (IS_ERR(fp)) {
3067 fput(filp);
3068 rc = PTR_ERR(fp);
3069 fp = NULL;
3070 goto err_out;
3071 }
3072
3073 /* Get Persistent-ID */
3074 ksmbd_open_durable_fd(fp);
3075 if (!has_file_id(fp->persistent_id)) {
3076 rc = -ENOMEM;
3077 goto err_out;
3078 }
3079
3080 fp->cdoption = req->CreateDisposition;
3081 fp->daccess = daccess;
3082 fp->saccess = req->ShareAccess;
3083 fp->coption = req->CreateOptions;
3084
3085 /* Set default windows and posix acls if creating new file */
3086 if (created) {
3087 int posix_acl_rc;
3088 struct inode *inode = d_inode(path.dentry);
3089
3090 posix_acl_rc = ksmbd_vfs_inherit_posix_acl(idmap,
3091 &path,
3092 d_inode(path.dentry->d_parent));
3093 if (posix_acl_rc)
3094 ksmbd_debug(SMB, "inherit posix acl failed : %d\n", posix_acl_rc);
3095
3096 if (test_share_config_flag(work->tcon->share_conf,
3097 KSMBD_SHARE_FLAG_ACL_XATTR)) {
3098 rc = smb_inherit_dacl(conn, &path, sess->user->uid,
3099 sess->user->gid);
3100 }
3101
3102 if (rc) {
3103 rc = smb2_create_sd_buffer(work, req, &path);
3104 if (rc) {
3105 if (posix_acl_rc)
3106 ksmbd_vfs_set_init_posix_acl(idmap,
3107 &path);
3108
3109 if (test_share_config_flag(work->tcon->share_conf,
3110 KSMBD_SHARE_FLAG_ACL_XATTR)) {
3111 struct smb_fattr fattr;
3112 struct smb_ntsd *pntsd;
3113 int pntsd_size, ace_num = 0;
3114
3115 ksmbd_acls_fattr(&fattr, idmap, inode);
3116 if (fattr.cf_acls)
3117 ace_num = fattr.cf_acls->a_count;
3118 if (fattr.cf_dacls)
3119 ace_num += fattr.cf_dacls->a_count;
3120
3121 pntsd = kmalloc(sizeof(struct smb_ntsd) +
3122 sizeof(struct smb_sid) * 3 +
3123 sizeof(struct smb_acl) +
3124 sizeof(struct smb_ace) * ace_num * 2,
3125 GFP_KERNEL);
3126 if (!pntsd) {
3127 posix_acl_release(fattr.cf_acls);
3128 posix_acl_release(fattr.cf_dacls);
3129 goto err_out;
3130 }
3131
3132 rc = build_sec_desc(idmap,
3133 pntsd, NULL, 0,
3134 OWNER_SECINFO |
3135 GROUP_SECINFO |
3136 DACL_SECINFO,
3137 &pntsd_size, &fattr);
3138 posix_acl_release(fattr.cf_acls);
3139 posix_acl_release(fattr.cf_dacls);
3140 if (rc) {
3141 kfree(pntsd);
3142 goto err_out;
3143 }
3144
3145 rc = ksmbd_vfs_set_sd_xattr(conn,
3146 idmap,
3147 &path,
3148 pntsd,
3149 pntsd_size,
3150 false);
3151 kfree(pntsd);
3152 if (rc)
3153 pr_err("failed to store ntacl in xattr : %d\n",
3154 rc);
3155 }
3156 }
3157 }
3158 rc = 0;
3159 }
3160
3161 if (stream_name) {
3162 rc = smb2_set_stream_name_xattr(&path,
3163 fp,
3164 stream_name,
3165 s_type);
3166 if (rc)
3167 goto err_out;
3168 file_info = FILE_CREATED;
3169 }
3170
3171 fp->attrib_only = !(req->DesiredAccess & ~(FILE_READ_ATTRIBUTES_LE |
3172 FILE_WRITE_ATTRIBUTES_LE | FILE_SYNCHRONIZE_LE));
3173
3174 /* fp should be searchable through ksmbd_inode.m_fp_list
3175 * after daccess, saccess, attrib_only, and stream are
3176 * initialized.
3177 */
3178 write_lock(&fp->f_ci->m_lock);
3179 list_add(&fp->node, &fp->f_ci->m_fp_list);
3180 write_unlock(&fp->f_ci->m_lock);
3181
3182 /* Check delete pending among previous fp before oplock break */
3183 if (ksmbd_inode_pending_delete(fp)) {
3184 rc = -EBUSY;
3185 goto err_out;
3186 }
3187
3188 if (file_present || created)
3189 ksmbd_vfs_kern_path_unlock(&parent_path, &path);
3190
3191 if (!S_ISDIR(file_inode(filp)->i_mode) && open_flags & O_TRUNC &&
3192 !fp->attrib_only && !stream_name) {
3193 smb_break_all_oplock(work, fp);
3194 need_truncate = 1;
3195 }
3196
3197 req_op_level = req->RequestedOplockLevel;
3198 if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE)
3199 lc = parse_lease_state(req, S_ISDIR(file_inode(filp)->i_mode));
3200
3201 share_ret = ksmbd_smb_check_shared_mode(fp->filp, fp);
3202 if (!test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_OPLOCKS) ||
3203 (req_op_level == SMB2_OPLOCK_LEVEL_LEASE &&
3204 !(conn->vals->capabilities & SMB2_GLOBAL_CAP_LEASING))) {
3205 if (share_ret < 0 && !S_ISDIR(file_inode(fp->filp)->i_mode)) {
3206 rc = share_ret;
3207 goto err_out1;
3208 }
3209 } else {
3210 if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE) {
3211 /*
3212 * Compare parent lease using parent key. If there is no
3213 * a lease that has same parent key, Send lease break
3214 * notification.
3215 */
3216 smb_send_parent_lease_break_noti(fp, lc);
3217
3218 req_op_level = smb2_map_lease_to_oplock(lc->req_state);
3219 ksmbd_debug(SMB,
3220 "lease req for(%s) req oplock state 0x%x, lease state 0x%x\n",
3221 name, req_op_level, lc->req_state);
3222 rc = find_same_lease_key(sess, fp->f_ci, lc);
3223 if (rc)
3224 goto err_out1;
3225 } else if (open_flags == O_RDONLY &&
3226 (req_op_level == SMB2_OPLOCK_LEVEL_BATCH ||
3227 req_op_level == SMB2_OPLOCK_LEVEL_EXCLUSIVE))
3228 req_op_level = SMB2_OPLOCK_LEVEL_II;
3229
3230 rc = smb_grant_oplock(work, req_op_level,
3231 fp->persistent_id, fp,
3232 le32_to_cpu(req->hdr.Id.SyncId.TreeId),
3233 lc, share_ret);
3234 if (rc < 0)
3235 goto err_out1;
3236 }
3237
3238 if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)
3239 ksmbd_fd_set_delete_on_close(fp, file_info);
3240
3241 if (need_truncate) {
3242 rc = smb2_create_truncate(&fp->filp->f_path);
3243 if (rc)
3244 goto err_out1;
3245 }
3246
3247 if (req->CreateContextsOffset) {
3248 struct create_alloc_size_req *az_req;
3249
3250 az_req = (struct create_alloc_size_req *)smb2_find_context_vals(req,
3251 SMB2_CREATE_ALLOCATION_SIZE, 4);
3252 if (IS_ERR(az_req)) {
3253 rc = PTR_ERR(az_req);
3254 goto err_out1;
3255 } else if (az_req) {
3256 loff_t alloc_size;
3257 int err;
3258
3259 if (le16_to_cpu(az_req->ccontext.DataOffset) +
3260 le32_to_cpu(az_req->ccontext.DataLength) <
3261 sizeof(struct create_alloc_size_req)) {
3262 rc = -EINVAL;
3263 goto err_out1;
3264 }
3265 alloc_size = le64_to_cpu(az_req->AllocationSize);
3266 ksmbd_debug(SMB,
3267 "request smb2 create allocate size : %llu\n",
3268 alloc_size);
3269 smb_break_all_levII_oplock(work, fp, 1);
3270 err = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0,
3271 alloc_size);
3272 if (err < 0)
3273 ksmbd_debug(SMB,
3274 "vfs_fallocate is failed : %d\n",
3275 err);
3276 }
3277
3278 context = smb2_find_context_vals(req, SMB2_CREATE_QUERY_ON_DISK_ID, 4);
3279 if (IS_ERR(context)) {
3280 rc = PTR_ERR(context);
3281 goto err_out1;
3282 } else if (context) {
3283 ksmbd_debug(SMB, "get query on disk id context\n");
3284 query_disk_id = 1;
3285 }
3286 }
3287
3288 rc = ksmbd_vfs_getattr(&path, &stat);
3289 if (rc)
3290 goto err_out1;
3291
3292 if (stat.result_mask & STATX_BTIME)
3293 fp->create_time = ksmbd_UnixTimeToNT(stat.btime);
3294 else
3295 fp->create_time = ksmbd_UnixTimeToNT(stat.ctime);
3296 if (req->FileAttributes || fp->f_ci->m_fattr == 0)
3297 fp->f_ci->m_fattr =
3298 cpu_to_le32(smb2_get_dos_mode(&stat, le32_to_cpu(req->FileAttributes)));
3299
3300 if (!created)
3301 smb2_update_xattrs(tcon, &path, fp);
3302 else
3303 smb2_new_xattrs(tcon, &path, fp);
3304
3305 memcpy(fp->client_guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE);
3306
3307 rsp->StructureSize = cpu_to_le16(89);
3308 rcu_read_lock();
3309 opinfo = rcu_dereference(fp->f_opinfo);
3310 rsp->OplockLevel = opinfo != NULL ? opinfo->level : 0;
3311 rcu_read_unlock();
3312 rsp->Flags = 0;
3313 rsp->CreateAction = cpu_to_le32(file_info);
3314 rsp->CreationTime = cpu_to_le64(fp->create_time);
3315 time = ksmbd_UnixTimeToNT(stat.atime);
3316 rsp->LastAccessTime = cpu_to_le64(time);
3317 time = ksmbd_UnixTimeToNT(stat.mtime);
3318 rsp->LastWriteTime = cpu_to_le64(time);
3319 time = ksmbd_UnixTimeToNT(stat.ctime);
3320 rsp->ChangeTime = cpu_to_le64(time);
3321 rsp->AllocationSize = S_ISDIR(stat.mode) ? 0 :
3322 cpu_to_le64(stat.blocks << 9);
3323 rsp->EndofFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
3324 rsp->FileAttributes = fp->f_ci->m_fattr;
3325
3326 rsp->Reserved2 = 0;
3327
3328 rsp->PersistentFileId = fp->persistent_id;
3329 rsp->VolatileFileId = fp->volatile_id;
3330
3331 rsp->CreateContextsOffset = 0;
3332 rsp->CreateContextsLength = 0;
3333 iov_len = offsetof(struct smb2_create_rsp, Buffer);
3334
3335 /* If lease is request send lease context response */
3336 if (opinfo && opinfo->is_lease) {
3337 struct create_context *lease_ccontext;
3338
3339 ksmbd_debug(SMB, "lease granted on(%s) lease state 0x%x\n",
3340 name, opinfo->o_lease->state);
3341 rsp->OplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
3342
3343 lease_ccontext = (struct create_context *)rsp->Buffer;
3344 contxt_cnt++;
3345 create_lease_buf(rsp->Buffer, opinfo->o_lease);
3346 le32_add_cpu(&rsp->CreateContextsLength,
3347 conn->vals->create_lease_size);
3348 iov_len += conn->vals->create_lease_size;
3349 next_ptr = &lease_ccontext->Next;
3350 next_off = conn->vals->create_lease_size;
3351 }
3352
3353 if (maximal_access_ctxt) {
3354 struct create_context *mxac_ccontext;
3355
3356 if (maximal_access == 0)
3357 ksmbd_vfs_query_maximal_access(idmap,
3358 path.dentry,
3359 &maximal_access);
3360 mxac_ccontext = (struct create_context *)(rsp->Buffer +
3361 le32_to_cpu(rsp->CreateContextsLength));
3362 contxt_cnt++;
3363 create_mxac_rsp_buf(rsp->Buffer +
3364 le32_to_cpu(rsp->CreateContextsLength),
3365 le32_to_cpu(maximal_access));
3366 le32_add_cpu(&rsp->CreateContextsLength,
3367 conn->vals->create_mxac_size);
3368 iov_len += conn->vals->create_mxac_size;
3369 if (next_ptr)
3370 *next_ptr = cpu_to_le32(next_off);
3371 next_ptr = &mxac_ccontext->Next;
3372 next_off = conn->vals->create_mxac_size;
3373 }
3374
3375 if (query_disk_id) {
3376 struct create_context *disk_id_ccontext;
3377
3378 disk_id_ccontext = (struct create_context *)(rsp->Buffer +
3379 le32_to_cpu(rsp->CreateContextsLength));
3380 contxt_cnt++;
3381 create_disk_id_rsp_buf(rsp->Buffer +
3382 le32_to_cpu(rsp->CreateContextsLength),
3383 stat.ino, tcon->id);
3384 le32_add_cpu(&rsp->CreateContextsLength,
3385 conn->vals->create_disk_id_size);
3386 iov_len += conn->vals->create_disk_id_size;
3387 if (next_ptr)
3388 *next_ptr = cpu_to_le32(next_off);
3389 next_ptr = &disk_id_ccontext->Next;
3390 next_off = conn->vals->create_disk_id_size;
3391 }
3392
3393 if (posix_ctxt) {
3394 contxt_cnt++;
3395 create_posix_rsp_buf(rsp->Buffer +
3396 le32_to_cpu(rsp->CreateContextsLength),
3397 fp);
3398 le32_add_cpu(&rsp->CreateContextsLength,
3399 conn->vals->create_posix_size);
3400 iov_len += conn->vals->create_posix_size;
3401 if (next_ptr)
3402 *next_ptr = cpu_to_le32(next_off);
3403 }
3404
3405 if (contxt_cnt > 0) {
3406 rsp->CreateContextsOffset =
3407 cpu_to_le32(offsetof(struct smb2_create_rsp, Buffer));
3408 }
3409
3410 err_out:
3411 if (rc && (file_present || created))
3412 ksmbd_vfs_kern_path_unlock(&parent_path, &path);
3413
3414 err_out1:
3415 ksmbd_revert_fsids(work);
3416
3417 err_out2:
3418 if (!rc) {
3419 ksmbd_update_fstate(&work->sess->file_table, fp, FP_INITED);
3420 rc = ksmbd_iov_pin_rsp(work, (void *)rsp, iov_len);
3421 }
3422 if (rc) {
3423 if (rc == -EINVAL)
3424 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
3425 else if (rc == -EOPNOTSUPP)
3426 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
3427 else if (rc == -EACCES || rc == -ESTALE || rc == -EXDEV)
3428 rsp->hdr.Status = STATUS_ACCESS_DENIED;
3429 else if (rc == -ENOENT)
3430 rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID;
3431 else if (rc == -EPERM)
3432 rsp->hdr.Status = STATUS_SHARING_VIOLATION;
3433 else if (rc == -EBUSY)
3434 rsp->hdr.Status = STATUS_DELETE_PENDING;
3435 else if (rc == -EBADF)
3436 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
3437 else if (rc == -ENOEXEC)
3438 rsp->hdr.Status = STATUS_DUPLICATE_OBJECTID;
3439 else if (rc == -ENXIO)
3440 rsp->hdr.Status = STATUS_NO_SUCH_DEVICE;
3441 else if (rc == -EEXIST)
3442 rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION;
3443 else if (rc == -EMFILE)
3444 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
3445 if (!rsp->hdr.Status)
3446 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
3447
3448 if (fp)
3449 ksmbd_fd_put(work, fp);
3450 smb2_set_err_rsp(work);
3451 ksmbd_debug(SMB, "Error response: %x\n", rsp->hdr.Status);
3452 }
3453
3454 kfree(name);
3455 kfree(lc);
3456
3457 return 0;
3458 }
3459
3460 static int readdir_info_level_struct_sz(int info_level)
3461 {
3462 switch (info_level) {
3463 case FILE_FULL_DIRECTORY_INFORMATION:
3464 return sizeof(struct file_full_directory_info);
3465 case FILE_BOTH_DIRECTORY_INFORMATION:
3466 return sizeof(struct file_both_directory_info);
3467 case FILE_DIRECTORY_INFORMATION:
3468 return sizeof(struct file_directory_info);
3469 case FILE_NAMES_INFORMATION:
3470 return sizeof(struct file_names_info);
3471 case FILEID_FULL_DIRECTORY_INFORMATION:
3472 return sizeof(struct file_id_full_dir_info);
3473 case FILEID_BOTH_DIRECTORY_INFORMATION:
3474 return sizeof(struct file_id_both_directory_info);
3475 case SMB_FIND_FILE_POSIX_INFO:
3476 return sizeof(struct smb2_posix_info);
3477 default:
3478 return -EOPNOTSUPP;
3479 }
3480 }
3481
3482 static int dentry_name(struct ksmbd_dir_info *d_info, int info_level)
3483 {
3484 switch (info_level) {
3485 case FILE_FULL_DIRECTORY_INFORMATION:
3486 {
3487 struct file_full_directory_info *ffdinfo;
3488
3489 ffdinfo = (struct file_full_directory_info *)d_info->rptr;
3490 d_info->rptr += le32_to_cpu(ffdinfo->NextEntryOffset);
3491 d_info->name = ffdinfo->FileName;
3492 d_info->name_len = le32_to_cpu(ffdinfo->FileNameLength);
3493 return 0;
3494 }
3495 case FILE_BOTH_DIRECTORY_INFORMATION:
3496 {
3497 struct file_both_directory_info *fbdinfo;
3498
3499 fbdinfo = (struct file_both_directory_info *)d_info->rptr;
3500 d_info->rptr += le32_to_cpu(fbdinfo->NextEntryOffset);
3501 d_info->name = fbdinfo->FileName;
3502 d_info->name_len = le32_to_cpu(fbdinfo->FileNameLength);
3503 return 0;
3504 }
3505 case FILE_DIRECTORY_INFORMATION:
3506 {
3507 struct file_directory_info *fdinfo;
3508
3509 fdinfo = (struct file_directory_info *)d_info->rptr;
3510 d_info->rptr += le32_to_cpu(fdinfo->NextEntryOffset);
3511 d_info->name = fdinfo->FileName;
3512 d_info->name_len = le32_to_cpu(fdinfo->FileNameLength);
3513 return 0;
3514 }
3515 case FILE_NAMES_INFORMATION:
3516 {
3517 struct file_names_info *fninfo;
3518
3519 fninfo = (struct file_names_info *)d_info->rptr;
3520 d_info->rptr += le32_to_cpu(fninfo->NextEntryOffset);
3521 d_info->name = fninfo->FileName;
3522 d_info->name_len = le32_to_cpu(fninfo->FileNameLength);
3523 return 0;
3524 }
3525 case FILEID_FULL_DIRECTORY_INFORMATION:
3526 {
3527 struct file_id_full_dir_info *dinfo;
3528
3529 dinfo = (struct file_id_full_dir_info *)d_info->rptr;
3530 d_info->rptr += le32_to_cpu(dinfo->NextEntryOffset);
3531 d_info->name = dinfo->FileName;
3532 d_info->name_len = le32_to_cpu(dinfo->FileNameLength);
3533 return 0;
3534 }
3535 case FILEID_BOTH_DIRECTORY_INFORMATION:
3536 {
3537 struct file_id_both_directory_info *fibdinfo;
3538
3539 fibdinfo = (struct file_id_both_directory_info *)d_info->rptr;
3540 d_info->rptr += le32_to_cpu(fibdinfo->NextEntryOffset);
3541 d_info->name = fibdinfo->FileName;
3542 d_info->name_len = le32_to_cpu(fibdinfo->FileNameLength);
3543 return 0;
3544 }
3545 case SMB_FIND_FILE_POSIX_INFO:
3546 {
3547 struct smb2_posix_info *posix_info;
3548
3549 posix_info = (struct smb2_posix_info *)d_info->rptr;
3550 d_info->rptr += le32_to_cpu(posix_info->NextEntryOffset);
3551 d_info->name = posix_info->name;
3552 d_info->name_len = le32_to_cpu(posix_info->name_len);
3553 return 0;
3554 }
3555 default:
3556 return -EINVAL;
3557 }
3558 }
3559
3560 /**
3561 * smb2_populate_readdir_entry() - encode directory entry in smb2 response
3562 * buffer
3563 * @conn: connection instance
3564 * @info_level: smb information level
3565 * @d_info: structure included variables for query dir
3566 * @ksmbd_kstat: ksmbd wrapper of dirent stat information
3567 *
3568 * if directory has many entries, find first can't read it fully.
3569 * find next might be called multiple times to read remaining dir entries
3570 *
3571 * Return: 0 on success, otherwise error
3572 */
3573 static int smb2_populate_readdir_entry(struct ksmbd_conn *conn, int info_level,
3574 struct ksmbd_dir_info *d_info,
3575 struct ksmbd_kstat *ksmbd_kstat)
3576 {
3577 int next_entry_offset = 0;
3578 char *conv_name;
3579 int conv_len;
3580 void *kstat;
3581 int struct_sz, rc = 0;
3582
3583 conv_name = ksmbd_convert_dir_info_name(d_info,
3584 conn->local_nls,
3585 &conv_len);
3586 if (!conv_name)
3587 return -ENOMEM;
3588
3589 /* Somehow the name has only terminating NULL bytes */
3590 if (conv_len < 0) {
3591 rc = -EINVAL;
3592 goto free_conv_name;
3593 }
3594
3595 struct_sz = readdir_info_level_struct_sz(info_level) + conv_len;
3596 next_entry_offset = ALIGN(struct_sz, KSMBD_DIR_INFO_ALIGNMENT);
3597 d_info->last_entry_off_align = next_entry_offset - struct_sz;
3598
3599 if (next_entry_offset > d_info->out_buf_len) {
3600 d_info->out_buf_len = 0;
3601 rc = -ENOSPC;
3602 goto free_conv_name;
3603 }
3604
3605 kstat = d_info->wptr;
3606 if (info_level != FILE_NAMES_INFORMATION)
3607 kstat = ksmbd_vfs_init_kstat(&d_info->wptr, ksmbd_kstat);
3608
3609 switch (info_level) {
3610 case FILE_FULL_DIRECTORY_INFORMATION:
3611 {
3612 struct file_full_directory_info *ffdinfo;
3613
3614 ffdinfo = (struct file_full_directory_info *)kstat;
3615 ffdinfo->FileNameLength = cpu_to_le32(conv_len);
3616 ffdinfo->EaSize =
3617 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3618 if (ffdinfo->EaSize)
3619 ffdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3620 if (d_info->hide_dot_file && d_info->name[0] == '.')
3621 ffdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3622 memcpy(ffdinfo->FileName, conv_name, conv_len);
3623 ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3624 break;
3625 }
3626 case FILE_BOTH_DIRECTORY_INFORMATION:
3627 {
3628 struct file_both_directory_info *fbdinfo;
3629
3630 fbdinfo = (struct file_both_directory_info *)kstat;
3631 fbdinfo->FileNameLength = cpu_to_le32(conv_len);
3632 fbdinfo->EaSize =
3633 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3634 if (fbdinfo->EaSize)
3635 fbdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3636 fbdinfo->ShortNameLength = 0;
3637 fbdinfo->Reserved = 0;
3638 if (d_info->hide_dot_file && d_info->name[0] == '.')
3639 fbdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3640 memcpy(fbdinfo->FileName, conv_name, conv_len);
3641 fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3642 break;
3643 }
3644 case FILE_DIRECTORY_INFORMATION:
3645 {
3646 struct file_directory_info *fdinfo;
3647
3648 fdinfo = (struct file_directory_info *)kstat;
3649 fdinfo->FileNameLength = cpu_to_le32(conv_len);
3650 if (d_info->hide_dot_file && d_info->name[0] == '.')
3651 fdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3652 memcpy(fdinfo->FileName, conv_name, conv_len);
3653 fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3654 break;
3655 }
3656 case FILE_NAMES_INFORMATION:
3657 {
3658 struct file_names_info *fninfo;
3659
3660 fninfo = (struct file_names_info *)kstat;
3661 fninfo->FileNameLength = cpu_to_le32(conv_len);
3662 memcpy(fninfo->FileName, conv_name, conv_len);
3663 fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3664 break;
3665 }
3666 case FILEID_FULL_DIRECTORY_INFORMATION:
3667 {
3668 struct file_id_full_dir_info *dinfo;
3669
3670 dinfo = (struct file_id_full_dir_info *)kstat;
3671 dinfo->FileNameLength = cpu_to_le32(conv_len);
3672 dinfo->EaSize =
3673 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3674 if (dinfo->EaSize)
3675 dinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3676 dinfo->Reserved = 0;
3677 dinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino);
3678 if (d_info->hide_dot_file && d_info->name[0] == '.')
3679 dinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3680 memcpy(dinfo->FileName, conv_name, conv_len);
3681 dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3682 break;
3683 }
3684 case FILEID_BOTH_DIRECTORY_INFORMATION:
3685 {
3686 struct file_id_both_directory_info *fibdinfo;
3687
3688 fibdinfo = (struct file_id_both_directory_info *)kstat;
3689 fibdinfo->FileNameLength = cpu_to_le32(conv_len);
3690 fibdinfo->EaSize =
3691 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3692 if (fibdinfo->EaSize)
3693 fibdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3694 fibdinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino);
3695 fibdinfo->ShortNameLength = 0;
3696 fibdinfo->Reserved = 0;
3697 fibdinfo->Reserved2 = cpu_to_le16(0);
3698 if (d_info->hide_dot_file && d_info->name[0] == '.')
3699 fibdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3700 memcpy(fibdinfo->FileName, conv_name, conv_len);
3701 fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3702 break;
3703 }
3704 case SMB_FIND_FILE_POSIX_INFO:
3705 {
3706 struct smb2_posix_info *posix_info;
3707 u64 time;
3708
3709 posix_info = (struct smb2_posix_info *)kstat;
3710 posix_info->Ignored = 0;
3711 posix_info->CreationTime = cpu_to_le64(ksmbd_kstat->create_time);
3712 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->ctime);
3713 posix_info->ChangeTime = cpu_to_le64(time);
3714 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->atime);
3715 posix_info->LastAccessTime = cpu_to_le64(time);
3716 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->mtime);
3717 posix_info->LastWriteTime = cpu_to_le64(time);
3718 posix_info->EndOfFile = cpu_to_le64(ksmbd_kstat->kstat->size);
3719 posix_info->AllocationSize = cpu_to_le64(ksmbd_kstat->kstat->blocks << 9);
3720 posix_info->DeviceId = cpu_to_le32(ksmbd_kstat->kstat->rdev);
3721 posix_info->HardLinks = cpu_to_le32(ksmbd_kstat->kstat->nlink);
3722 posix_info->Mode = cpu_to_le32(ksmbd_kstat->kstat->mode & 0777);
3723 posix_info->Inode = cpu_to_le64(ksmbd_kstat->kstat->ino);
3724 posix_info->DosAttributes =
3725 S_ISDIR(ksmbd_kstat->kstat->mode) ?
3726 FILE_ATTRIBUTE_DIRECTORY_LE : FILE_ATTRIBUTE_ARCHIVE_LE;
3727 if (d_info->hide_dot_file && d_info->name[0] == '.')
3728 posix_info->DosAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3729 /*
3730 * SidBuffer(32) contain two sids(Domain sid(16), UNIX group sid(16)).
3731 * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) +
3732 * sub_auth(4 * 1(num_subauth)) + RID(4).
3733 */
3734 id_to_sid(from_kuid_munged(&init_user_ns, ksmbd_kstat->kstat->uid),
3735 SIDUNIX_USER, (struct smb_sid *)&posix_info->SidBuffer[0]);
3736 id_to_sid(from_kgid_munged(&init_user_ns, ksmbd_kstat->kstat->gid),
3737 SIDUNIX_GROUP, (struct smb_sid *)&posix_info->SidBuffer[16]);
3738 memcpy(posix_info->name, conv_name, conv_len);
3739 posix_info->name_len = cpu_to_le32(conv_len);
3740 posix_info->NextEntryOffset = cpu_to_le32(next_entry_offset);
3741 break;
3742 }
3743
3744 } /* switch (info_level) */
3745
3746 d_info->last_entry_offset = d_info->data_count;
3747 d_info->data_count += next_entry_offset;
3748 d_info->out_buf_len -= next_entry_offset;
3749 d_info->wptr += next_entry_offset;
3750
3751 ksmbd_debug(SMB,
3752 "info_level : %d, buf_len :%d, next_offset : %d, data_count : %d\n",
3753 info_level, d_info->out_buf_len,
3754 next_entry_offset, d_info->data_count);
3755
3756 free_conv_name:
3757 kfree(conv_name);
3758 return rc;
3759 }
3760
3761 struct smb2_query_dir_private {
3762 struct ksmbd_work *work;
3763 char *search_pattern;
3764 struct ksmbd_file *dir_fp;
3765
3766 struct ksmbd_dir_info *d_info;
3767 int info_level;
3768 };
3769
3770 static void lock_dir(struct ksmbd_file *dir_fp)
3771 {
3772 struct dentry *dir = dir_fp->filp->f_path.dentry;
3773
3774 inode_lock_nested(d_inode(dir), I_MUTEX_PARENT);
3775 }
3776
3777 static void unlock_dir(struct ksmbd_file *dir_fp)
3778 {
3779 struct dentry *dir = dir_fp->filp->f_path.dentry;
3780
3781 inode_unlock(d_inode(dir));
3782 }
3783
3784 static int process_query_dir_entries(struct smb2_query_dir_private *priv)
3785 {
3786 struct mnt_idmap *idmap = file_mnt_idmap(priv->dir_fp->filp);
3787 struct kstat kstat;
3788 struct ksmbd_kstat ksmbd_kstat;
3789 int rc;
3790 int i;
3791
3792 for (i = 0; i < priv->d_info->num_entry; i++) {
3793 struct dentry *dent;
3794
3795 if (dentry_name(priv->d_info, priv->info_level))
3796 return -EINVAL;
3797
3798 lock_dir(priv->dir_fp);
3799 dent = lookup_one(idmap, priv->d_info->name,
3800 priv->dir_fp->filp->f_path.dentry,
3801 priv->d_info->name_len);
3802 unlock_dir(priv->dir_fp);
3803
3804 if (IS_ERR(dent)) {
3805 ksmbd_debug(SMB, "Cannot lookup `%s' [%ld]\n",
3806 priv->d_info->name,
3807 PTR_ERR(dent));
3808 continue;
3809 }
3810 if (unlikely(d_is_negative(dent))) {
3811 dput(dent);
3812 ksmbd_debug(SMB, "Negative dentry `%s'\n",
3813 priv->d_info->name);
3814 continue;
3815 }
3816
3817 ksmbd_kstat.kstat = &kstat;
3818 if (priv->info_level != FILE_NAMES_INFORMATION)
3819 ksmbd_vfs_fill_dentry_attrs(priv->work,
3820 idmap,
3821 dent,
3822 &ksmbd_kstat);
3823
3824 rc = smb2_populate_readdir_entry(priv->work->conn,
3825 priv->info_level,
3826 priv->d_info,
3827 &ksmbd_kstat);
3828 dput(dent);
3829 if (rc)
3830 return rc;
3831 }
3832 return 0;
3833 }
3834
3835 static int reserve_populate_dentry(struct ksmbd_dir_info *d_info,
3836 int info_level)
3837 {
3838 int struct_sz;
3839 int conv_len;
3840 int next_entry_offset;
3841
3842 struct_sz = readdir_info_level_struct_sz(info_level);
3843 if (struct_sz == -EOPNOTSUPP)
3844 return -EOPNOTSUPP;
3845
3846 conv_len = (d_info->name_len + 1) * 2;
3847 next_entry_offset = ALIGN(struct_sz + conv_len,
3848 KSMBD_DIR_INFO_ALIGNMENT);
3849
3850 if (next_entry_offset > d_info->out_buf_len) {
3851 d_info->out_buf_len = 0;
3852 return -ENOSPC;
3853 }
3854
3855 switch (info_level) {
3856 case FILE_FULL_DIRECTORY_INFORMATION:
3857 {
3858 struct file_full_directory_info *ffdinfo;
3859
3860 ffdinfo = (struct file_full_directory_info *)d_info->wptr;
3861 memcpy(ffdinfo->FileName, d_info->name, d_info->name_len);
3862 ffdinfo->FileName[d_info->name_len] = 0x00;
3863 ffdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3864 ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3865 break;
3866 }
3867 case FILE_BOTH_DIRECTORY_INFORMATION:
3868 {
3869 struct file_both_directory_info *fbdinfo;
3870
3871 fbdinfo = (struct file_both_directory_info *)d_info->wptr;
3872 memcpy(fbdinfo->FileName, d_info->name, d_info->name_len);
3873 fbdinfo->FileName[d_info->name_len] = 0x00;
3874 fbdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3875 fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3876 break;
3877 }
3878 case FILE_DIRECTORY_INFORMATION:
3879 {
3880 struct file_directory_info *fdinfo;
3881
3882 fdinfo = (struct file_directory_info *)d_info->wptr;
3883 memcpy(fdinfo->FileName, d_info->name, d_info->name_len);
3884 fdinfo->FileName[d_info->name_len] = 0x00;
3885 fdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3886 fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3887 break;
3888 }
3889 case FILE_NAMES_INFORMATION:
3890 {
3891 struct file_names_info *fninfo;
3892
3893 fninfo = (struct file_names_info *)d_info->wptr;
3894 memcpy(fninfo->FileName, d_info->name, d_info->name_len);
3895 fninfo->FileName[d_info->name_len] = 0x00;
3896 fninfo->FileNameLength = cpu_to_le32(d_info->name_len);
3897 fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3898 break;
3899 }
3900 case FILEID_FULL_DIRECTORY_INFORMATION:
3901 {
3902 struct file_id_full_dir_info *dinfo;
3903
3904 dinfo = (struct file_id_full_dir_info *)d_info->wptr;
3905 memcpy(dinfo->FileName, d_info->name, d_info->name_len);
3906 dinfo->FileName[d_info->name_len] = 0x00;
3907 dinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3908 dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3909 break;
3910 }
3911 case FILEID_BOTH_DIRECTORY_INFORMATION:
3912 {
3913 struct file_id_both_directory_info *fibdinfo;
3914
3915 fibdinfo = (struct file_id_both_directory_info *)d_info->wptr;
3916 memcpy(fibdinfo->FileName, d_info->name, d_info->name_len);
3917 fibdinfo->FileName[d_info->name_len] = 0x00;
3918 fibdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3919 fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3920 break;
3921 }
3922 case SMB_FIND_FILE_POSIX_INFO:
3923 {
3924 struct smb2_posix_info *posix_info;
3925
3926 posix_info = (struct smb2_posix_info *)d_info->wptr;
3927 memcpy(posix_info->name, d_info->name, d_info->name_len);
3928 posix_info->name[d_info->name_len] = 0x00;
3929 posix_info->name_len = cpu_to_le32(d_info->name_len);
3930 posix_info->NextEntryOffset =
3931 cpu_to_le32(next_entry_offset);
3932 break;
3933 }
3934 } /* switch (info_level) */
3935
3936 d_info->num_entry++;
3937 d_info->out_buf_len -= next_entry_offset;
3938 d_info->wptr += next_entry_offset;
3939 return 0;
3940 }
3941
3942 static bool __query_dir(struct dir_context *ctx, const char *name, int namlen,
3943 loff_t offset, u64 ino, unsigned int d_type)
3944 {
3945 struct ksmbd_readdir_data *buf;
3946 struct smb2_query_dir_private *priv;
3947 struct ksmbd_dir_info *d_info;
3948 int rc;
3949
3950 buf = container_of(ctx, struct ksmbd_readdir_data, ctx);
3951 priv = buf->private;
3952 d_info = priv->d_info;
3953
3954 /* dot and dotdot entries are already reserved */
3955 if (!strcmp(".", name) || !strcmp("..", name))
3956 return true;
3957 if (ksmbd_share_veto_filename(priv->work->tcon->share_conf, name))
3958 return true;
3959 if (!match_pattern(name, namlen, priv->search_pattern))
3960 return true;
3961
3962 d_info->name = name;
3963 d_info->name_len = namlen;
3964 rc = reserve_populate_dentry(d_info, priv->info_level);
3965 if (rc)
3966 return false;
3967 if (d_info->flags & SMB2_RETURN_SINGLE_ENTRY)
3968 d_info->out_buf_len = 0;
3969 return true;
3970 }
3971
3972 static int verify_info_level(int info_level)
3973 {
3974 switch (info_level) {
3975 case FILE_FULL_DIRECTORY_INFORMATION:
3976 case FILE_BOTH_DIRECTORY_INFORMATION:
3977 case FILE_DIRECTORY_INFORMATION:
3978 case FILE_NAMES_INFORMATION:
3979 case FILEID_FULL_DIRECTORY_INFORMATION:
3980 case FILEID_BOTH_DIRECTORY_INFORMATION:
3981 case SMB_FIND_FILE_POSIX_INFO:
3982 break;
3983 default:
3984 return -EOPNOTSUPP;
3985 }
3986
3987 return 0;
3988 }
3989
3990 static int smb2_resp_buf_len(struct ksmbd_work *work, unsigned short hdr2_len)
3991 {
3992 int free_len;
3993
3994 free_len = (int)(work->response_sz -
3995 (get_rfc1002_len(work->response_buf) + 4)) - hdr2_len;
3996 return free_len;
3997 }
3998
3999 static int smb2_calc_max_out_buf_len(struct ksmbd_work *work,
4000 unsigned short hdr2_len,
4001 unsigned int out_buf_len)
4002 {
4003 int free_len;
4004
4005 if (out_buf_len > work->conn->vals->max_trans_size)
4006 return -EINVAL;
4007
4008 free_len = smb2_resp_buf_len(work, hdr2_len);
4009 if (free_len < 0)
4010 return -EINVAL;
4011
4012 return min_t(int, out_buf_len, free_len);
4013 }
4014
4015 int smb2_query_dir(struct ksmbd_work *work)
4016 {
4017 struct ksmbd_conn *conn = work->conn;
4018 struct smb2_query_directory_req *req;
4019 struct smb2_query_directory_rsp *rsp;
4020 struct ksmbd_share_config *share = work->tcon->share_conf;
4021 struct ksmbd_file *dir_fp = NULL;
4022 struct ksmbd_dir_info d_info;
4023 int rc = 0;
4024 char *srch_ptr = NULL;
4025 unsigned char srch_flag;
4026 int buffer_sz;
4027 struct smb2_query_dir_private query_dir_private = {NULL, };
4028
4029 WORK_BUFFERS(work, req, rsp);
4030
4031 if (ksmbd_override_fsids(work)) {
4032 rsp->hdr.Status = STATUS_NO_MEMORY;
4033 smb2_set_err_rsp(work);
4034 return -ENOMEM;
4035 }
4036
4037 rc = verify_info_level(req->FileInformationClass);
4038 if (rc) {
4039 rc = -EFAULT;
4040 goto err_out2;
4041 }
4042
4043 dir_fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
4044 if (!dir_fp) {
4045 rc = -EBADF;
4046 goto err_out2;
4047 }
4048
4049 if (!(dir_fp->daccess & FILE_LIST_DIRECTORY_LE) ||
4050 inode_permission(file_mnt_idmap(dir_fp->filp),
4051 file_inode(dir_fp->filp),
4052 MAY_READ | MAY_EXEC)) {
4053 pr_err("no right to enumerate directory (%pD)\n", dir_fp->filp);
4054 rc = -EACCES;
4055 goto err_out2;
4056 }
4057
4058 if (!S_ISDIR(file_inode(dir_fp->filp)->i_mode)) {
4059 pr_err("can't do query dir for a file\n");
4060 rc = -EINVAL;
4061 goto err_out2;
4062 }
4063
4064 srch_flag = req->Flags;
4065 srch_ptr = smb_strndup_from_utf16(req->Buffer,
4066 le16_to_cpu(req->FileNameLength), 1,
4067 conn->local_nls);
4068 if (IS_ERR(srch_ptr)) {
4069 ksmbd_debug(SMB, "Search Pattern not found\n");
4070 rc = -EINVAL;
4071 goto err_out2;
4072 } else {
4073 ksmbd_debug(SMB, "Search pattern is %s\n", srch_ptr);
4074 }
4075
4076 if (srch_flag & SMB2_REOPEN || srch_flag & SMB2_RESTART_SCANS) {
4077 ksmbd_debug(SMB, "Restart directory scan\n");
4078 generic_file_llseek(dir_fp->filp, 0, SEEK_SET);
4079 }
4080
4081 memset(&d_info, 0, sizeof(struct ksmbd_dir_info));
4082 d_info.wptr = (char *)rsp->Buffer;
4083 d_info.rptr = (char *)rsp->Buffer;
4084 d_info.out_buf_len =
4085 smb2_calc_max_out_buf_len(work, 8,
4086 le32_to_cpu(req->OutputBufferLength));
4087 if (d_info.out_buf_len < 0) {
4088 rc = -EINVAL;
4089 goto err_out;
4090 }
4091 d_info.flags = srch_flag;
4092
4093 /*
4094 * reserve dot and dotdot entries in head of buffer
4095 * in first response
4096 */
4097 rc = ksmbd_populate_dot_dotdot_entries(work, req->FileInformationClass,
4098 dir_fp, &d_info, srch_ptr,
4099 smb2_populate_readdir_entry);
4100 if (rc == -ENOSPC)
4101 rc = 0;
4102 else if (rc)
4103 goto err_out;
4104
4105 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_HIDE_DOT_FILES))
4106 d_info.hide_dot_file = true;
4107
4108 buffer_sz = d_info.out_buf_len;
4109 d_info.rptr = d_info.wptr;
4110 query_dir_private.work = work;
4111 query_dir_private.search_pattern = srch_ptr;
4112 query_dir_private.dir_fp = dir_fp;
4113 query_dir_private.d_info = &d_info;
4114 query_dir_private.info_level = req->FileInformationClass;
4115 dir_fp->readdir_data.private = &query_dir_private;
4116 set_ctx_actor(&dir_fp->readdir_data.ctx, __query_dir);
4117
4118 rc = iterate_dir(dir_fp->filp, &dir_fp->readdir_data.ctx);
4119 /*
4120 * req->OutputBufferLength is too small to contain even one entry.
4121 * In this case, it immediately returns OutputBufferLength 0 to client.
4122 */
4123 if (!d_info.out_buf_len && !d_info.num_entry)
4124 goto no_buf_len;
4125 if (rc > 0 || rc == -ENOSPC)
4126 rc = 0;
4127 else if (rc)
4128 goto err_out;
4129
4130 d_info.wptr = d_info.rptr;
4131 d_info.out_buf_len = buffer_sz;
4132 rc = process_query_dir_entries(&query_dir_private);
4133 if (rc)
4134 goto err_out;
4135
4136 if (!d_info.data_count && d_info.out_buf_len >= 0) {
4137 if (srch_flag & SMB2_RETURN_SINGLE_ENTRY && !is_asterisk(srch_ptr)) {
4138 rsp->hdr.Status = STATUS_NO_SUCH_FILE;
4139 } else {
4140 dir_fp->dot_dotdot[0] = dir_fp->dot_dotdot[1] = 0;
4141 rsp->hdr.Status = STATUS_NO_MORE_FILES;
4142 }
4143 rsp->StructureSize = cpu_to_le16(9);
4144 rsp->OutputBufferOffset = cpu_to_le16(0);
4145 rsp->OutputBufferLength = cpu_to_le32(0);
4146 rsp->Buffer[0] = 0;
4147 rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
4148 sizeof(struct smb2_query_directory_rsp));
4149 if (rc)
4150 goto err_out;
4151 } else {
4152 no_buf_len:
4153 ((struct file_directory_info *)
4154 ((char *)rsp->Buffer + d_info.last_entry_offset))
4155 ->NextEntryOffset = 0;
4156 if (d_info.data_count >= d_info.last_entry_off_align)
4157 d_info.data_count -= d_info.last_entry_off_align;
4158
4159 rsp->StructureSize = cpu_to_le16(9);
4160 rsp->OutputBufferOffset = cpu_to_le16(72);
4161 rsp->OutputBufferLength = cpu_to_le32(d_info.data_count);
4162 rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
4163 offsetof(struct smb2_query_directory_rsp, Buffer) +
4164 d_info.data_count);
4165 if (rc)
4166 goto err_out;
4167 }
4168
4169 kfree(srch_ptr);
4170 ksmbd_fd_put(work, dir_fp);
4171 ksmbd_revert_fsids(work);
4172 return 0;
4173
4174 err_out:
4175 pr_err("error while processing smb2 query dir rc = %d\n", rc);
4176 kfree(srch_ptr);
4177
4178 err_out2:
4179 if (rc == -EINVAL)
4180 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
4181 else if (rc == -EACCES)
4182 rsp->hdr.Status = STATUS_ACCESS_DENIED;
4183 else if (rc == -ENOENT)
4184 rsp->hdr.Status = STATUS_NO_SUCH_FILE;
4185 else if (rc == -EBADF)
4186 rsp->hdr.Status = STATUS_FILE_CLOSED;
4187 else if (rc == -ENOMEM)
4188 rsp->hdr.Status = STATUS_NO_MEMORY;
4189 else if (rc == -EFAULT)
4190 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
4191 else if (rc == -EIO)
4192 rsp->hdr.Status = STATUS_FILE_CORRUPT_ERROR;
4193 if (!rsp->hdr.Status)
4194 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
4195
4196 smb2_set_err_rsp(work);
4197 ksmbd_fd_put(work, dir_fp);
4198 ksmbd_revert_fsids(work);
4199 return 0;
4200 }
4201
4202 /**
4203 * buffer_check_err() - helper function to check buffer errors
4204 * @reqOutputBufferLength: max buffer length expected in command response
4205 * @rsp: query info response buffer contains output buffer length
4206 * @rsp_org: base response buffer pointer in case of chained response
4207 *
4208 * Return: 0 on success, otherwise error
4209 */
4210 static int buffer_check_err(int reqOutputBufferLength,
4211 struct smb2_query_info_rsp *rsp,
4212 void *rsp_org)
4213 {
4214 if (reqOutputBufferLength < le32_to_cpu(rsp->OutputBufferLength)) {
4215 pr_err("Invalid Buffer Size Requested\n");
4216 rsp->hdr.Status = STATUS_INFO_LENGTH_MISMATCH;
4217 *(__be32 *)rsp_org = cpu_to_be32(sizeof(struct smb2_hdr));
4218 return -EINVAL;
4219 }
4220 return 0;
4221 }
4222
4223 static void get_standard_info_pipe(struct smb2_query_info_rsp *rsp,
4224 void *rsp_org)
4225 {
4226 struct smb2_file_standard_info *sinfo;
4227
4228 sinfo = (struct smb2_file_standard_info *)rsp->Buffer;
4229
4230 sinfo->AllocationSize = cpu_to_le64(4096);
4231 sinfo->EndOfFile = cpu_to_le64(0);
4232 sinfo->NumberOfLinks = cpu_to_le32(1);
4233 sinfo->DeletePending = 1;
4234 sinfo->Directory = 0;
4235 rsp->OutputBufferLength =
4236 cpu_to_le32(sizeof(struct smb2_file_standard_info));
4237 }
4238
4239 static void get_internal_info_pipe(struct smb2_query_info_rsp *rsp, u64 num,
4240 void *rsp_org)
4241 {
4242 struct smb2_file_internal_info *file_info;
4243
4244 file_info = (struct smb2_file_internal_info *)rsp->Buffer;
4245
4246 /* any unique number */
4247 file_info->IndexNumber = cpu_to_le64(num | (1ULL << 63));
4248 rsp->OutputBufferLength =
4249 cpu_to_le32(sizeof(struct smb2_file_internal_info));
4250 }
4251
4252 static int smb2_get_info_file_pipe(struct ksmbd_session *sess,
4253 struct smb2_query_info_req *req,
4254 struct smb2_query_info_rsp *rsp,
4255 void *rsp_org)
4256 {
4257 u64 id;
4258 int rc;
4259
4260 /*
4261 * Windows can sometime send query file info request on
4262 * pipe without opening it, checking error condition here
4263 */
4264 id = req->VolatileFileId;
4265 if (!ksmbd_session_rpc_method(sess, id))
4266 return -ENOENT;
4267
4268 ksmbd_debug(SMB, "FileInfoClass %u, FileId 0x%llx\n",
4269 req->FileInfoClass, req->VolatileFileId);
4270
4271 switch (req->FileInfoClass) {
4272 case FILE_STANDARD_INFORMATION:
4273 get_standard_info_pipe(rsp, rsp_org);
4274 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4275 rsp, rsp_org);
4276 break;
4277 case FILE_INTERNAL_INFORMATION:
4278 get_internal_info_pipe(rsp, id, rsp_org);
4279 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4280 rsp, rsp_org);
4281 break;
4282 default:
4283 ksmbd_debug(SMB, "smb2_info_file_pipe for %u not supported\n",
4284 req->FileInfoClass);
4285 rc = -EOPNOTSUPP;
4286 }
4287 return rc;
4288 }
4289
4290 /**
4291 * smb2_get_ea() - handler for smb2 get extended attribute command
4292 * @work: smb work containing query info command buffer
4293 * @fp: ksmbd_file pointer
4294 * @req: get extended attribute request
4295 * @rsp: response buffer pointer
4296 * @rsp_org: base response buffer pointer in case of chained response
4297 *
4298 * Return: 0 on success, otherwise error
4299 */
4300 static int smb2_get_ea(struct ksmbd_work *work, struct ksmbd_file *fp,
4301 struct smb2_query_info_req *req,
4302 struct smb2_query_info_rsp *rsp, void *rsp_org)
4303 {
4304 struct smb2_ea_info *eainfo, *prev_eainfo;
4305 char *name, *ptr, *xattr_list = NULL, *buf;
4306 int rc, name_len, value_len, xattr_list_len, idx;
4307 ssize_t buf_free_len, alignment_bytes, next_offset, rsp_data_cnt = 0;
4308 struct smb2_ea_info_req *ea_req = NULL;
4309 const struct path *path;
4310 struct mnt_idmap *idmap = file_mnt_idmap(fp->filp);
4311
4312 if (!(fp->daccess & FILE_READ_EA_LE)) {
4313 pr_err("Not permitted to read ext attr : 0x%x\n",
4314 fp->daccess);
4315 return -EACCES;
4316 }
4317
4318 path = &fp->filp->f_path;
4319 /* single EA entry is requested with given user.* name */
4320 if (req->InputBufferLength) {
4321 if (le32_to_cpu(req->InputBufferLength) <
4322 sizeof(struct smb2_ea_info_req))
4323 return -EINVAL;
4324
4325 ea_req = (struct smb2_ea_info_req *)req->Buffer;
4326 } else {
4327 /* need to send all EAs, if no specific EA is requested*/
4328 if (le32_to_cpu(req->Flags) & SL_RETURN_SINGLE_ENTRY)
4329 ksmbd_debug(SMB,
4330 "All EAs are requested but need to send single EA entry in rsp flags 0x%x\n",
4331 le32_to_cpu(req->Flags));
4332 }
4333
4334 buf_free_len =
4335 smb2_calc_max_out_buf_len(work, 8,
4336 le32_to_cpu(req->OutputBufferLength));
4337 if (buf_free_len < 0)
4338 return -EINVAL;
4339
4340 rc = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
4341 if (rc < 0) {
4342 rsp->hdr.Status = STATUS_INVALID_HANDLE;
4343 goto out;
4344 } else if (!rc) { /* there is no EA in the file */
4345 ksmbd_debug(SMB, "no ea data in the file\n");
4346 goto done;
4347 }
4348 xattr_list_len = rc;
4349
4350 ptr = (char *)rsp->Buffer;
4351 eainfo = (struct smb2_ea_info *)ptr;
4352 prev_eainfo = eainfo;
4353 idx = 0;
4354
4355 while (idx < xattr_list_len) {
4356 name = xattr_list + idx;
4357 name_len = strlen(name);
4358
4359 ksmbd_debug(SMB, "%s, len %d\n", name, name_len);
4360 idx += name_len + 1;
4361
4362 /*
4363 * CIFS does not support EA other than user.* namespace,
4364 * still keep the framework generic, to list other attrs
4365 * in future.
4366 */
4367 if (strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4368 continue;
4369
4370 if (!strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX,
4371 STREAM_PREFIX_LEN))
4372 continue;
4373
4374 if (req->InputBufferLength &&
4375 strncmp(&name[XATTR_USER_PREFIX_LEN], ea_req->name,
4376 ea_req->EaNameLength))
4377 continue;
4378
4379 if (!strncmp(&name[XATTR_USER_PREFIX_LEN],
4380 DOS_ATTRIBUTE_PREFIX, DOS_ATTRIBUTE_PREFIX_LEN))
4381 continue;
4382
4383 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4384 name_len -= XATTR_USER_PREFIX_LEN;
4385
4386 ptr = eainfo->name + name_len + 1;
4387 buf_free_len -= (offsetof(struct smb2_ea_info, name) +
4388 name_len + 1);
4389 /* bailout if xattr can't fit in buf_free_len */
4390 value_len = ksmbd_vfs_getxattr(idmap, path->dentry,
4391 name, &buf);
4392 if (value_len <= 0) {
4393 rc = -ENOENT;
4394 rsp->hdr.Status = STATUS_INVALID_HANDLE;
4395 goto out;
4396 }
4397
4398 buf_free_len -= value_len;
4399 if (buf_free_len < 0) {
4400 kfree(buf);
4401 break;
4402 }
4403
4404 memcpy(ptr, buf, value_len);
4405 kfree(buf);
4406
4407 ptr += value_len;
4408 eainfo->Flags = 0;
4409 eainfo->EaNameLength = name_len;
4410
4411 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4412 memcpy(eainfo->name, &name[XATTR_USER_PREFIX_LEN],
4413 name_len);
4414 else
4415 memcpy(eainfo->name, name, name_len);
4416
4417 eainfo->name[name_len] = '\0';
4418 eainfo->EaValueLength = cpu_to_le16(value_len);
4419 next_offset = offsetof(struct smb2_ea_info, name) +
4420 name_len + 1 + value_len;
4421
4422 /* align next xattr entry at 4 byte bundary */
4423 alignment_bytes = ((next_offset + 3) & ~3) - next_offset;
4424 if (alignment_bytes) {
4425 memset(ptr, '\0', alignment_bytes);
4426 ptr += alignment_bytes;
4427 next_offset += alignment_bytes;
4428 buf_free_len -= alignment_bytes;
4429 }
4430 eainfo->NextEntryOffset = cpu_to_le32(next_offset);
4431 prev_eainfo = eainfo;
4432 eainfo = (struct smb2_ea_info *)ptr;
4433 rsp_data_cnt += next_offset;
4434
4435 if (req->InputBufferLength) {
4436 ksmbd_debug(SMB, "single entry requested\n");
4437 break;
4438 }
4439 }
4440
4441 /* no more ea entries */
4442 prev_eainfo->NextEntryOffset = 0;
4443 done:
4444 rc = 0;
4445 if (rsp_data_cnt == 0)
4446 rsp->hdr.Status = STATUS_NO_EAS_ON_FILE;
4447 rsp->OutputBufferLength = cpu_to_le32(rsp_data_cnt);
4448 out:
4449 kvfree(xattr_list);
4450 return rc;
4451 }
4452
4453 static void get_file_access_info(struct smb2_query_info_rsp *rsp,
4454 struct ksmbd_file *fp, void *rsp_org)
4455 {
4456 struct smb2_file_access_info *file_info;
4457
4458 file_info = (struct smb2_file_access_info *)rsp->Buffer;
4459 file_info->AccessFlags = fp->daccess;
4460 rsp->OutputBufferLength =
4461 cpu_to_le32(sizeof(struct smb2_file_access_info));
4462 }
4463
4464 static int get_file_basic_info(struct smb2_query_info_rsp *rsp,
4465 struct ksmbd_file *fp, void *rsp_org)
4466 {
4467 struct smb2_file_basic_info *basic_info;
4468 struct kstat stat;
4469 u64 time;
4470
4471 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4472 pr_err("no right to read the attributes : 0x%x\n",
4473 fp->daccess);
4474 return -EACCES;
4475 }
4476
4477 basic_info = (struct smb2_file_basic_info *)rsp->Buffer;
4478 generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS,
4479 file_inode(fp->filp), &stat);
4480 basic_info->CreationTime = cpu_to_le64(fp->create_time);
4481 time = ksmbd_UnixTimeToNT(stat.atime);
4482 basic_info->LastAccessTime = cpu_to_le64(time);
4483 time = ksmbd_UnixTimeToNT(stat.mtime);
4484 basic_info->LastWriteTime = cpu_to_le64(time);
4485 time = ksmbd_UnixTimeToNT(stat.ctime);
4486 basic_info->ChangeTime = cpu_to_le64(time);
4487 basic_info->Attributes = fp->f_ci->m_fattr;
4488 basic_info->Pad1 = 0;
4489 rsp->OutputBufferLength =
4490 cpu_to_le32(sizeof(struct smb2_file_basic_info));
4491 return 0;
4492 }
4493
4494 static void get_file_standard_info(struct smb2_query_info_rsp *rsp,
4495 struct ksmbd_file *fp, void *rsp_org)
4496 {
4497 struct smb2_file_standard_info *sinfo;
4498 unsigned int delete_pending;
4499 struct inode *inode;
4500 struct kstat stat;
4501
4502 inode = file_inode(fp->filp);
4503 generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS, inode, &stat);
4504
4505 sinfo = (struct smb2_file_standard_info *)rsp->Buffer;
4506 delete_pending = ksmbd_inode_pending_delete(fp);
4507
4508 sinfo->AllocationSize = cpu_to_le64(inode->i_blocks << 9);
4509 sinfo->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4510 sinfo->NumberOfLinks = cpu_to_le32(get_nlink(&stat) - delete_pending);
4511 sinfo->DeletePending = delete_pending;
4512 sinfo->Directory = S_ISDIR(stat.mode) ? 1 : 0;
4513 rsp->OutputBufferLength =
4514 cpu_to_le32(sizeof(struct smb2_file_standard_info));
4515 }
4516
4517 static void get_file_alignment_info(struct smb2_query_info_rsp *rsp,
4518 void *rsp_org)
4519 {
4520 struct smb2_file_alignment_info *file_info;
4521
4522 file_info = (struct smb2_file_alignment_info *)rsp->Buffer;
4523 file_info->AlignmentRequirement = 0;
4524 rsp->OutputBufferLength =
4525 cpu_to_le32(sizeof(struct smb2_file_alignment_info));
4526 }
4527
4528 static int get_file_all_info(struct ksmbd_work *work,
4529 struct smb2_query_info_rsp *rsp,
4530 struct ksmbd_file *fp,
4531 void *rsp_org)
4532 {
4533 struct ksmbd_conn *conn = work->conn;
4534 struct smb2_file_all_info *file_info;
4535 unsigned int delete_pending;
4536 struct inode *inode;
4537 struct kstat stat;
4538 int conv_len;
4539 char *filename;
4540 u64 time;
4541
4542 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4543 ksmbd_debug(SMB, "no right to read the attributes : 0x%x\n",
4544 fp->daccess);
4545 return -EACCES;
4546 }
4547
4548 filename = convert_to_nt_pathname(work->tcon->share_conf, &fp->filp->f_path);
4549 if (IS_ERR(filename))
4550 return PTR_ERR(filename);
4551
4552 inode = file_inode(fp->filp);
4553 generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS, inode, &stat);
4554
4555 ksmbd_debug(SMB, "filename = %s\n", filename);
4556 delete_pending = ksmbd_inode_pending_delete(fp);
4557 file_info = (struct smb2_file_all_info *)rsp->Buffer;
4558
4559 file_info->CreationTime = cpu_to_le64(fp->create_time);
4560 time = ksmbd_UnixTimeToNT(stat.atime);
4561 file_info->LastAccessTime = cpu_to_le64(time);
4562 time = ksmbd_UnixTimeToNT(stat.mtime);
4563 file_info->LastWriteTime = cpu_to_le64(time);
4564 time = ksmbd_UnixTimeToNT(stat.ctime);
4565 file_info->ChangeTime = cpu_to_le64(time);
4566 file_info->Attributes = fp->f_ci->m_fattr;
4567 file_info->Pad1 = 0;
4568 file_info->AllocationSize =
4569 cpu_to_le64(inode->i_blocks << 9);
4570 file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4571 file_info->NumberOfLinks =
4572 cpu_to_le32(get_nlink(&stat) - delete_pending);
4573 file_info->DeletePending = delete_pending;
4574 file_info->Directory = S_ISDIR(stat.mode) ? 1 : 0;
4575 file_info->Pad2 = 0;
4576 file_info->IndexNumber = cpu_to_le64(stat.ino);
4577 file_info->EASize = 0;
4578 file_info->AccessFlags = fp->daccess;
4579 file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos);
4580 file_info->Mode = fp->coption;
4581 file_info->AlignmentRequirement = 0;
4582 conv_len = smbConvertToUTF16((__le16 *)file_info->FileName, filename,
4583 PATH_MAX, conn->local_nls, 0);
4584 conv_len *= 2;
4585 file_info->FileNameLength = cpu_to_le32(conv_len);
4586 rsp->OutputBufferLength =
4587 cpu_to_le32(sizeof(struct smb2_file_all_info) + conv_len - 1);
4588 kfree(filename);
4589 return 0;
4590 }
4591
4592 static void get_file_alternate_info(struct ksmbd_work *work,
4593 struct smb2_query_info_rsp *rsp,
4594 struct ksmbd_file *fp,
4595 void *rsp_org)
4596 {
4597 struct ksmbd_conn *conn = work->conn;
4598 struct smb2_file_alt_name_info *file_info;
4599 struct dentry *dentry = fp->filp->f_path.dentry;
4600 int conv_len;
4601
4602 spin_lock(&dentry->d_lock);
4603 file_info = (struct smb2_file_alt_name_info *)rsp->Buffer;
4604 conv_len = ksmbd_extract_shortname(conn,
4605 dentry->d_name.name,
4606 file_info->FileName);
4607 spin_unlock(&dentry->d_lock);
4608 file_info->FileNameLength = cpu_to_le32(conv_len);
4609 rsp->OutputBufferLength =
4610 cpu_to_le32(sizeof(struct smb2_file_alt_name_info) + conv_len);
4611 }
4612
4613 static void get_file_stream_info(struct ksmbd_work *work,
4614 struct smb2_query_info_rsp *rsp,
4615 struct ksmbd_file *fp,
4616 void *rsp_org)
4617 {
4618 struct ksmbd_conn *conn = work->conn;
4619 struct smb2_file_stream_info *file_info;
4620 char *stream_name, *xattr_list = NULL, *stream_buf;
4621 struct kstat stat;
4622 const struct path *path = &fp->filp->f_path;
4623 ssize_t xattr_list_len;
4624 int nbytes = 0, streamlen, stream_name_len, next, idx = 0;
4625 int buf_free_len;
4626 struct smb2_query_info_req *req = ksmbd_req_buf_next(work);
4627
4628 generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS,
4629 file_inode(fp->filp), &stat);
4630 file_info = (struct smb2_file_stream_info *)rsp->Buffer;
4631
4632 buf_free_len =
4633 smb2_calc_max_out_buf_len(work, 8,
4634 le32_to_cpu(req->OutputBufferLength));
4635 if (buf_free_len < 0)
4636 goto out;
4637
4638 xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
4639 if (xattr_list_len < 0) {
4640 goto out;
4641 } else if (!xattr_list_len) {
4642 ksmbd_debug(SMB, "empty xattr in the file\n");
4643 goto out;
4644 }
4645
4646 while (idx < xattr_list_len) {
4647 stream_name = xattr_list + idx;
4648 streamlen = strlen(stream_name);
4649 idx += streamlen + 1;
4650
4651 ksmbd_debug(SMB, "%s, len %d\n", stream_name, streamlen);
4652
4653 if (strncmp(&stream_name[XATTR_USER_PREFIX_LEN],
4654 STREAM_PREFIX, STREAM_PREFIX_LEN))
4655 continue;
4656
4657 stream_name_len = streamlen - (XATTR_USER_PREFIX_LEN +
4658 STREAM_PREFIX_LEN);
4659 streamlen = stream_name_len;
4660
4661 /* plus : size */
4662 streamlen += 1;
4663 stream_buf = kmalloc(streamlen + 1, GFP_KERNEL);
4664 if (!stream_buf)
4665 break;
4666
4667 streamlen = snprintf(stream_buf, streamlen + 1,
4668 ":%s", &stream_name[XATTR_NAME_STREAM_LEN]);
4669
4670 next = sizeof(struct smb2_file_stream_info) + streamlen * 2;
4671 if (next > buf_free_len) {
4672 kfree(stream_buf);
4673 break;
4674 }
4675
4676 file_info = (struct smb2_file_stream_info *)&rsp->Buffer[nbytes];
4677 streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName,
4678 stream_buf, streamlen,
4679 conn->local_nls, 0);
4680 streamlen *= 2;
4681 kfree(stream_buf);
4682 file_info->StreamNameLength = cpu_to_le32(streamlen);
4683 file_info->StreamSize = cpu_to_le64(stream_name_len);
4684 file_info->StreamAllocationSize = cpu_to_le64(stream_name_len);
4685
4686 nbytes += next;
4687 buf_free_len -= next;
4688 file_info->NextEntryOffset = cpu_to_le32(next);
4689 }
4690
4691 out:
4692 if (!S_ISDIR(stat.mode) &&
4693 buf_free_len >= sizeof(struct smb2_file_stream_info) + 7 * 2) {
4694 file_info = (struct smb2_file_stream_info *)
4695 &rsp->Buffer[nbytes];
4696 streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName,
4697 "::$DATA", 7, conn->local_nls, 0);
4698 streamlen *= 2;
4699 file_info->StreamNameLength = cpu_to_le32(streamlen);
4700 file_info->StreamSize = cpu_to_le64(stat.size);
4701 file_info->StreamAllocationSize = cpu_to_le64(stat.blocks << 9);
4702 nbytes += sizeof(struct smb2_file_stream_info) + streamlen;
4703 }
4704
4705 /* last entry offset should be 0 */
4706 file_info->NextEntryOffset = 0;
4707 kvfree(xattr_list);
4708
4709 rsp->OutputBufferLength = cpu_to_le32(nbytes);
4710 }
4711
4712 static void get_file_internal_info(struct smb2_query_info_rsp *rsp,
4713 struct ksmbd_file *fp, void *rsp_org)
4714 {
4715 struct smb2_file_internal_info *file_info;
4716 struct kstat stat;
4717
4718 generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS,
4719 file_inode(fp->filp), &stat);
4720 file_info = (struct smb2_file_internal_info *)rsp->Buffer;
4721 file_info->IndexNumber = cpu_to_le64(stat.ino);
4722 rsp->OutputBufferLength =
4723 cpu_to_le32(sizeof(struct smb2_file_internal_info));
4724 }
4725
4726 static int get_file_network_open_info(struct smb2_query_info_rsp *rsp,
4727 struct ksmbd_file *fp, void *rsp_org)
4728 {
4729 struct smb2_file_ntwrk_info *file_info;
4730 struct inode *inode;
4731 struct kstat stat;
4732 u64 time;
4733
4734 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4735 pr_err("no right to read the attributes : 0x%x\n",
4736 fp->daccess);
4737 return -EACCES;
4738 }
4739
4740 file_info = (struct smb2_file_ntwrk_info *)rsp->Buffer;
4741
4742 inode = file_inode(fp->filp);
4743 generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS, inode, &stat);
4744
4745 file_info->CreationTime = cpu_to_le64(fp->create_time);
4746 time = ksmbd_UnixTimeToNT(stat.atime);
4747 file_info->LastAccessTime = cpu_to_le64(time);
4748 time = ksmbd_UnixTimeToNT(stat.mtime);
4749 file_info->LastWriteTime = cpu_to_le64(time);
4750 time = ksmbd_UnixTimeToNT(stat.ctime);
4751 file_info->ChangeTime = cpu_to_le64(time);
4752 file_info->Attributes = fp->f_ci->m_fattr;
4753 file_info->AllocationSize =
4754 cpu_to_le64(inode->i_blocks << 9);
4755 file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4756 file_info->Reserved = cpu_to_le32(0);
4757 rsp->OutputBufferLength =
4758 cpu_to_le32(sizeof(struct smb2_file_ntwrk_info));
4759 return 0;
4760 }
4761
4762 static void get_file_ea_info(struct smb2_query_info_rsp *rsp, void *rsp_org)
4763 {
4764 struct smb2_file_ea_info *file_info;
4765
4766 file_info = (struct smb2_file_ea_info *)rsp->Buffer;
4767 file_info->EASize = 0;
4768 rsp->OutputBufferLength =
4769 cpu_to_le32(sizeof(struct smb2_file_ea_info));
4770 }
4771
4772 static void get_file_position_info(struct smb2_query_info_rsp *rsp,
4773 struct ksmbd_file *fp, void *rsp_org)
4774 {
4775 struct smb2_file_pos_info *file_info;
4776
4777 file_info = (struct smb2_file_pos_info *)rsp->Buffer;
4778 file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos);
4779 rsp->OutputBufferLength =
4780 cpu_to_le32(sizeof(struct smb2_file_pos_info));
4781 }
4782
4783 static void get_file_mode_info(struct smb2_query_info_rsp *rsp,
4784 struct ksmbd_file *fp, void *rsp_org)
4785 {
4786 struct smb2_file_mode_info *file_info;
4787
4788 file_info = (struct smb2_file_mode_info *)rsp->Buffer;
4789 file_info->Mode = fp->coption & FILE_MODE_INFO_MASK;
4790 rsp->OutputBufferLength =
4791 cpu_to_le32(sizeof(struct smb2_file_mode_info));
4792 }
4793
4794 static void get_file_compression_info(struct smb2_query_info_rsp *rsp,
4795 struct ksmbd_file *fp, void *rsp_org)
4796 {
4797 struct smb2_file_comp_info *file_info;
4798 struct kstat stat;
4799
4800 generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS,
4801 file_inode(fp->filp), &stat);
4802
4803 file_info = (struct smb2_file_comp_info *)rsp->Buffer;
4804 file_info->CompressedFileSize = cpu_to_le64(stat.blocks << 9);
4805 file_info->CompressionFormat = COMPRESSION_FORMAT_NONE;
4806 file_info->CompressionUnitShift = 0;
4807 file_info->ChunkShift = 0;
4808 file_info->ClusterShift = 0;
4809 memset(&file_info->Reserved[0], 0, 3);
4810
4811 rsp->OutputBufferLength =
4812 cpu_to_le32(sizeof(struct smb2_file_comp_info));
4813 }
4814
4815 static int get_file_attribute_tag_info(struct smb2_query_info_rsp *rsp,
4816 struct ksmbd_file *fp, void *rsp_org)
4817 {
4818 struct smb2_file_attr_tag_info *file_info;
4819
4820 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4821 pr_err("no right to read the attributes : 0x%x\n",
4822 fp->daccess);
4823 return -EACCES;
4824 }
4825
4826 file_info = (struct smb2_file_attr_tag_info *)rsp->Buffer;
4827 file_info->FileAttributes = fp->f_ci->m_fattr;
4828 file_info->ReparseTag = 0;
4829 rsp->OutputBufferLength =
4830 cpu_to_le32(sizeof(struct smb2_file_attr_tag_info));
4831 return 0;
4832 }
4833
4834 static void find_file_posix_info(struct smb2_query_info_rsp *rsp,
4835 struct ksmbd_file *fp, void *rsp_org)
4836 {
4837 struct smb311_posix_qinfo *file_info;
4838 struct inode *inode = file_inode(fp->filp);
4839 struct mnt_idmap *idmap = file_mnt_idmap(fp->filp);
4840 vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode);
4841 vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode);
4842 u64 time;
4843 int out_buf_len = sizeof(struct smb311_posix_qinfo) + 32;
4844
4845 file_info = (struct smb311_posix_qinfo *)rsp->Buffer;
4846 file_info->CreationTime = cpu_to_le64(fp->create_time);
4847 time = ksmbd_UnixTimeToNT(inode_get_atime(inode));
4848 file_info->LastAccessTime = cpu_to_le64(time);
4849 time = ksmbd_UnixTimeToNT(inode_get_mtime(inode));
4850 file_info->LastWriteTime = cpu_to_le64(time);
4851 time = ksmbd_UnixTimeToNT(inode_get_ctime(inode));
4852 file_info->ChangeTime = cpu_to_le64(time);
4853 file_info->DosAttributes = fp->f_ci->m_fattr;
4854 file_info->Inode = cpu_to_le64(inode->i_ino);
4855 file_info->EndOfFile = cpu_to_le64(inode->i_size);
4856 file_info->AllocationSize = cpu_to_le64(inode->i_blocks << 9);
4857 file_info->HardLinks = cpu_to_le32(inode->i_nlink);
4858 file_info->Mode = cpu_to_le32(inode->i_mode & 0777);
4859 file_info->DeviceId = cpu_to_le32(inode->i_rdev);
4860
4861 /*
4862 * Sids(32) contain two sids(Domain sid(16), UNIX group sid(16)).
4863 * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) +
4864 * sub_auth(4 * 1(num_subauth)) + RID(4).
4865 */
4866 id_to_sid(from_kuid_munged(&init_user_ns, vfsuid_into_kuid(vfsuid)),
4867 SIDUNIX_USER, (struct smb_sid *)&file_info->Sids[0]);
4868 id_to_sid(from_kgid_munged(&init_user_ns, vfsgid_into_kgid(vfsgid)),
4869 SIDUNIX_GROUP, (struct smb_sid *)&file_info->Sids[16]);
4870
4871 rsp->OutputBufferLength = cpu_to_le32(out_buf_len);
4872 }
4873
4874 static int smb2_get_info_file(struct ksmbd_work *work,
4875 struct smb2_query_info_req *req,
4876 struct smb2_query_info_rsp *rsp)
4877 {
4878 struct ksmbd_file *fp;
4879 int fileinfoclass = 0;
4880 int rc = 0;
4881 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
4882
4883 if (test_share_config_flag(work->tcon->share_conf,
4884 KSMBD_SHARE_FLAG_PIPE)) {
4885 /* smb2 info file called for pipe */
4886 return smb2_get_info_file_pipe(work->sess, req, rsp,
4887 work->response_buf);
4888 }
4889
4890 if (work->next_smb2_rcv_hdr_off) {
4891 if (!has_file_id(req->VolatileFileId)) {
4892 ksmbd_debug(SMB, "Compound request set FID = %llu\n",
4893 work->compound_fid);
4894 id = work->compound_fid;
4895 pid = work->compound_pfid;
4896 }
4897 }
4898
4899 if (!has_file_id(id)) {
4900 id = req->VolatileFileId;
4901 pid = req->PersistentFileId;
4902 }
4903
4904 fp = ksmbd_lookup_fd_slow(work, id, pid);
4905 if (!fp)
4906 return -ENOENT;
4907
4908 fileinfoclass = req->FileInfoClass;
4909
4910 switch (fileinfoclass) {
4911 case FILE_ACCESS_INFORMATION:
4912 get_file_access_info(rsp, fp, work->response_buf);
4913 break;
4914
4915 case FILE_BASIC_INFORMATION:
4916 rc = get_file_basic_info(rsp, fp, work->response_buf);
4917 break;
4918
4919 case FILE_STANDARD_INFORMATION:
4920 get_file_standard_info(rsp, fp, work->response_buf);
4921 break;
4922
4923 case FILE_ALIGNMENT_INFORMATION:
4924 get_file_alignment_info(rsp, work->response_buf);
4925 break;
4926
4927 case FILE_ALL_INFORMATION:
4928 rc = get_file_all_info(work, rsp, fp, work->response_buf);
4929 break;
4930
4931 case FILE_ALTERNATE_NAME_INFORMATION:
4932 get_file_alternate_info(work, rsp, fp, work->response_buf);
4933 break;
4934
4935 case FILE_STREAM_INFORMATION:
4936 get_file_stream_info(work, rsp, fp, work->response_buf);
4937 break;
4938
4939 case FILE_INTERNAL_INFORMATION:
4940 get_file_internal_info(rsp, fp, work->response_buf);
4941 break;
4942
4943 case FILE_NETWORK_OPEN_INFORMATION:
4944 rc = get_file_network_open_info(rsp, fp, work->response_buf);
4945 break;
4946
4947 case FILE_EA_INFORMATION:
4948 get_file_ea_info(rsp, work->response_buf);
4949 break;
4950
4951 case FILE_FULL_EA_INFORMATION:
4952 rc = smb2_get_ea(work, fp, req, rsp, work->response_buf);
4953 break;
4954
4955 case FILE_POSITION_INFORMATION:
4956 get_file_position_info(rsp, fp, work->response_buf);
4957 break;
4958
4959 case FILE_MODE_INFORMATION:
4960 get_file_mode_info(rsp, fp, work->response_buf);
4961 break;
4962
4963 case FILE_COMPRESSION_INFORMATION:
4964 get_file_compression_info(rsp, fp, work->response_buf);
4965 break;
4966
4967 case FILE_ATTRIBUTE_TAG_INFORMATION:
4968 rc = get_file_attribute_tag_info(rsp, fp, work->response_buf);
4969 break;
4970 case SMB_FIND_FILE_POSIX_INFO:
4971 if (!work->tcon->posix_extensions) {
4972 pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n");
4973 rc = -EOPNOTSUPP;
4974 } else {
4975 find_file_posix_info(rsp, fp, work->response_buf);
4976 }
4977 break;
4978 default:
4979 ksmbd_debug(SMB, "fileinfoclass %d not supported yet\n",
4980 fileinfoclass);
4981 rc = -EOPNOTSUPP;
4982 }
4983 if (!rc)
4984 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4985 rsp, work->response_buf);
4986 ksmbd_fd_put(work, fp);
4987 return rc;
4988 }
4989
4990 static int smb2_get_info_filesystem(struct ksmbd_work *work,
4991 struct smb2_query_info_req *req,
4992 struct smb2_query_info_rsp *rsp)
4993 {
4994 struct ksmbd_session *sess = work->sess;
4995 struct ksmbd_conn *conn = work->conn;
4996 struct ksmbd_share_config *share = work->tcon->share_conf;
4997 int fsinfoclass = 0;
4998 struct kstatfs stfs;
4999 struct path path;
5000 int rc = 0, len;
5001
5002 if (!share->path)
5003 return -EIO;
5004
5005 rc = kern_path(share->path, LOOKUP_NO_SYMLINKS, &path);
5006 if (rc) {
5007 pr_err("cannot create vfs path\n");
5008 return -EIO;
5009 }
5010
5011 rc = vfs_statfs(&path, &stfs);
5012 if (rc) {
5013 pr_err("cannot do stat of path %s\n", share->path);
5014 path_put(&path);
5015 return -EIO;
5016 }
5017
5018 fsinfoclass = req->FileInfoClass;
5019
5020 switch (fsinfoclass) {
5021 case FS_DEVICE_INFORMATION:
5022 {
5023 struct filesystem_device_info *info;
5024
5025 info = (struct filesystem_device_info *)rsp->Buffer;
5026
5027 info->DeviceType = cpu_to_le32(stfs.f_type);
5028 info->DeviceCharacteristics = cpu_to_le32(0x00000020);
5029 rsp->OutputBufferLength = cpu_to_le32(8);
5030 break;
5031 }
5032 case FS_ATTRIBUTE_INFORMATION:
5033 {
5034 struct filesystem_attribute_info *info;
5035 size_t sz;
5036
5037 info = (struct filesystem_attribute_info *)rsp->Buffer;
5038 info->Attributes = cpu_to_le32(FILE_SUPPORTS_OBJECT_IDS |
5039 FILE_PERSISTENT_ACLS |
5040 FILE_UNICODE_ON_DISK |
5041 FILE_CASE_PRESERVED_NAMES |
5042 FILE_CASE_SENSITIVE_SEARCH |
5043 FILE_SUPPORTS_BLOCK_REFCOUNTING);
5044
5045 info->Attributes |= cpu_to_le32(server_conf.share_fake_fscaps);
5046
5047 if (test_share_config_flag(work->tcon->share_conf,
5048 KSMBD_SHARE_FLAG_STREAMS))
5049 info->Attributes |= cpu_to_le32(FILE_NAMED_STREAMS);
5050
5051 info->MaxPathNameComponentLength = cpu_to_le32(stfs.f_namelen);
5052 len = smbConvertToUTF16((__le16 *)info->FileSystemName,
5053 "NTFS", PATH_MAX, conn->local_nls, 0);
5054 len = len * 2;
5055 info->FileSystemNameLen = cpu_to_le32(len);
5056 sz = sizeof(struct filesystem_attribute_info) - 2 + len;
5057 rsp->OutputBufferLength = cpu_to_le32(sz);
5058 break;
5059 }
5060 case FS_VOLUME_INFORMATION:
5061 {
5062 struct filesystem_vol_info *info;
5063 size_t sz;
5064 unsigned int serial_crc = 0;
5065
5066 info = (struct filesystem_vol_info *)(rsp->Buffer);
5067 info->VolumeCreationTime = 0;
5068 serial_crc = crc32_le(serial_crc, share->name,
5069 strlen(share->name));
5070 serial_crc = crc32_le(serial_crc, share->path,
5071 strlen(share->path));
5072 serial_crc = crc32_le(serial_crc, ksmbd_netbios_name(),
5073 strlen(ksmbd_netbios_name()));
5074 /* Taking dummy value of serial number*/
5075 info->SerialNumber = cpu_to_le32(serial_crc);
5076 len = smbConvertToUTF16((__le16 *)info->VolumeLabel,
5077 share->name, PATH_MAX,
5078 conn->local_nls, 0);
5079 len = len * 2;
5080 info->VolumeLabelSize = cpu_to_le32(len);
5081 info->Reserved = 0;
5082 sz = sizeof(struct filesystem_vol_info) - 2 + len;
5083 rsp->OutputBufferLength = cpu_to_le32(sz);
5084 break;
5085 }
5086 case FS_SIZE_INFORMATION:
5087 {
5088 struct filesystem_info *info;
5089
5090 info = (struct filesystem_info *)(rsp->Buffer);
5091 info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks);
5092 info->FreeAllocationUnits = cpu_to_le64(stfs.f_bfree);
5093 info->SectorsPerAllocationUnit = cpu_to_le32(1);
5094 info->BytesPerSector = cpu_to_le32(stfs.f_bsize);
5095 rsp->OutputBufferLength = cpu_to_le32(24);
5096 break;
5097 }
5098 case FS_FULL_SIZE_INFORMATION:
5099 {
5100 struct smb2_fs_full_size_info *info;
5101
5102 info = (struct smb2_fs_full_size_info *)(rsp->Buffer);
5103 info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks);
5104 info->CallerAvailableAllocationUnits =
5105 cpu_to_le64(stfs.f_bavail);
5106 info->ActualAvailableAllocationUnits =
5107 cpu_to_le64(stfs.f_bfree);
5108 info->SectorsPerAllocationUnit = cpu_to_le32(1);
5109 info->BytesPerSector = cpu_to_le32(stfs.f_bsize);
5110 rsp->OutputBufferLength = cpu_to_le32(32);
5111 break;
5112 }
5113 case FS_OBJECT_ID_INFORMATION:
5114 {
5115 struct object_id_info *info;
5116
5117 info = (struct object_id_info *)(rsp->Buffer);
5118
5119 if (!user_guest(sess->user))
5120 memcpy(info->objid, user_passkey(sess->user), 16);
5121 else
5122 memset(info->objid, 0, 16);
5123
5124 info->extended_info.magic = cpu_to_le32(EXTENDED_INFO_MAGIC);
5125 info->extended_info.version = cpu_to_le32(1);
5126 info->extended_info.release = cpu_to_le32(1);
5127 info->extended_info.rel_date = 0;
5128 memcpy(info->extended_info.version_string, "1.1.0", strlen("1.1.0"));
5129 rsp->OutputBufferLength = cpu_to_le32(64);
5130 break;
5131 }
5132 case FS_SECTOR_SIZE_INFORMATION:
5133 {
5134 struct smb3_fs_ss_info *info;
5135 unsigned int sector_size =
5136 min_t(unsigned int, path.mnt->mnt_sb->s_blocksize, 4096);
5137
5138 info = (struct smb3_fs_ss_info *)(rsp->Buffer);
5139
5140 info->LogicalBytesPerSector = cpu_to_le32(sector_size);
5141 info->PhysicalBytesPerSectorForAtomicity =
5142 cpu_to_le32(sector_size);
5143 info->PhysicalBytesPerSectorForPerf = cpu_to_le32(sector_size);
5144 info->FSEffPhysicalBytesPerSectorForAtomicity =
5145 cpu_to_le32(sector_size);
5146 info->Flags = cpu_to_le32(SSINFO_FLAGS_ALIGNED_DEVICE |
5147 SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE);
5148 info->ByteOffsetForSectorAlignment = 0;
5149 info->ByteOffsetForPartitionAlignment = 0;
5150 rsp->OutputBufferLength = cpu_to_le32(28);
5151 break;
5152 }
5153 case FS_CONTROL_INFORMATION:
5154 {
5155 /*
5156 * TODO : The current implementation is based on
5157 * test result with win7(NTFS) server. It's need to
5158 * modify this to get valid Quota values
5159 * from Linux kernel
5160 */
5161 struct smb2_fs_control_info *info;
5162
5163 info = (struct smb2_fs_control_info *)(rsp->Buffer);
5164 info->FreeSpaceStartFiltering = 0;
5165 info->FreeSpaceThreshold = 0;
5166 info->FreeSpaceStopFiltering = 0;
5167 info->DefaultQuotaThreshold = cpu_to_le64(SMB2_NO_FID);
5168 info->DefaultQuotaLimit = cpu_to_le64(SMB2_NO_FID);
5169 info->Padding = 0;
5170 rsp->OutputBufferLength = cpu_to_le32(48);
5171 break;
5172 }
5173 case FS_POSIX_INFORMATION:
5174 {
5175 struct filesystem_posix_info *info;
5176
5177 if (!work->tcon->posix_extensions) {
5178 pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n");
5179 rc = -EOPNOTSUPP;
5180 } else {
5181 info = (struct filesystem_posix_info *)(rsp->Buffer);
5182 info->OptimalTransferSize = cpu_to_le32(stfs.f_bsize);
5183 info->BlockSize = cpu_to_le32(stfs.f_bsize);
5184 info->TotalBlocks = cpu_to_le64(stfs.f_blocks);
5185 info->BlocksAvail = cpu_to_le64(stfs.f_bfree);
5186 info->UserBlocksAvail = cpu_to_le64(stfs.f_bavail);
5187 info->TotalFileNodes = cpu_to_le64(stfs.f_files);
5188 info->FreeFileNodes = cpu_to_le64(stfs.f_ffree);
5189 rsp->OutputBufferLength = cpu_to_le32(56);
5190 }
5191 break;
5192 }
5193 default:
5194 path_put(&path);
5195 return -EOPNOTSUPP;
5196 }
5197 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
5198 rsp, work->response_buf);
5199 path_put(&path);
5200 return rc;
5201 }
5202
5203 static int smb2_get_info_sec(struct ksmbd_work *work,
5204 struct smb2_query_info_req *req,
5205 struct smb2_query_info_rsp *rsp)
5206 {
5207 struct ksmbd_file *fp;
5208 struct mnt_idmap *idmap;
5209 struct smb_ntsd *pntsd = (struct smb_ntsd *)rsp->Buffer, *ppntsd = NULL;
5210 struct smb_fattr fattr = {{0}};
5211 struct inode *inode;
5212 __u32 secdesclen = 0;
5213 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
5214 int addition_info = le32_to_cpu(req->AdditionalInformation);
5215 int rc = 0, ppntsd_size = 0;
5216
5217 if (addition_info & ~(OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO |
5218 PROTECTED_DACL_SECINFO |
5219 UNPROTECTED_DACL_SECINFO)) {
5220 ksmbd_debug(SMB, "Unsupported addition info: 0x%x)\n",
5221 addition_info);
5222
5223 pntsd->revision = cpu_to_le16(1);
5224 pntsd->type = cpu_to_le16(SELF_RELATIVE | DACL_PROTECTED);
5225 pntsd->osidoffset = 0;
5226 pntsd->gsidoffset = 0;
5227 pntsd->sacloffset = 0;
5228 pntsd->dacloffset = 0;
5229
5230 secdesclen = sizeof(struct smb_ntsd);
5231 rsp->OutputBufferLength = cpu_to_le32(secdesclen);
5232
5233 return 0;
5234 }
5235
5236 if (work->next_smb2_rcv_hdr_off) {
5237 if (!has_file_id(req->VolatileFileId)) {
5238 ksmbd_debug(SMB, "Compound request set FID = %llu\n",
5239 work->compound_fid);
5240 id = work->compound_fid;
5241 pid = work->compound_pfid;
5242 }
5243 }
5244
5245 if (!has_file_id(id)) {
5246 id = req->VolatileFileId;
5247 pid = req->PersistentFileId;
5248 }
5249
5250 fp = ksmbd_lookup_fd_slow(work, id, pid);
5251 if (!fp)
5252 return -ENOENT;
5253
5254 idmap = file_mnt_idmap(fp->filp);
5255 inode = file_inode(fp->filp);
5256 ksmbd_acls_fattr(&fattr, idmap, inode);
5257
5258 if (test_share_config_flag(work->tcon->share_conf,
5259 KSMBD_SHARE_FLAG_ACL_XATTR))
5260 ppntsd_size = ksmbd_vfs_get_sd_xattr(work->conn, idmap,
5261 fp->filp->f_path.dentry,
5262 &ppntsd);
5263
5264 /* Check if sd buffer size exceeds response buffer size */
5265 if (smb2_resp_buf_len(work, 8) > ppntsd_size)
5266 rc = build_sec_desc(idmap, pntsd, ppntsd, ppntsd_size,
5267 addition_info, &secdesclen, &fattr);
5268 posix_acl_release(fattr.cf_acls);
5269 posix_acl_release(fattr.cf_dacls);
5270 kfree(ppntsd);
5271 ksmbd_fd_put(work, fp);
5272 if (rc)
5273 return rc;
5274
5275 rsp->OutputBufferLength = cpu_to_le32(secdesclen);
5276 return 0;
5277 }
5278
5279 /**
5280 * smb2_query_info() - handler for smb2 query info command
5281 * @work: smb work containing query info request buffer
5282 *
5283 * Return: 0 on success, otherwise error
5284 */
5285 int smb2_query_info(struct ksmbd_work *work)
5286 {
5287 struct smb2_query_info_req *req;
5288 struct smb2_query_info_rsp *rsp;
5289 int rc = 0;
5290
5291 WORK_BUFFERS(work, req, rsp);
5292
5293 ksmbd_debug(SMB, "GOT query info request\n");
5294
5295 switch (req->InfoType) {
5296 case SMB2_O_INFO_FILE:
5297 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n");
5298 rc = smb2_get_info_file(work, req, rsp);
5299 break;
5300 case SMB2_O_INFO_FILESYSTEM:
5301 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILESYSTEM\n");
5302 rc = smb2_get_info_filesystem(work, req, rsp);
5303 break;
5304 case SMB2_O_INFO_SECURITY:
5305 ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n");
5306 rc = smb2_get_info_sec(work, req, rsp);
5307 break;
5308 default:
5309 ksmbd_debug(SMB, "InfoType %d not supported yet\n",
5310 req->InfoType);
5311 rc = -EOPNOTSUPP;
5312 }
5313
5314 if (!rc) {
5315 rsp->StructureSize = cpu_to_le16(9);
5316 rsp->OutputBufferOffset = cpu_to_le16(72);
5317 rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
5318 offsetof(struct smb2_query_info_rsp, Buffer) +
5319 le32_to_cpu(rsp->OutputBufferLength));
5320 }
5321
5322 if (rc < 0) {
5323 if (rc == -EACCES)
5324 rsp->hdr.Status = STATUS_ACCESS_DENIED;
5325 else if (rc == -ENOENT)
5326 rsp->hdr.Status = STATUS_FILE_CLOSED;
5327 else if (rc == -EIO)
5328 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
5329 else if (rc == -ENOMEM)
5330 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
5331 else if (rc == -EOPNOTSUPP || rsp->hdr.Status == 0)
5332 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
5333 smb2_set_err_rsp(work);
5334
5335 ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n",
5336 rc);
5337 return rc;
5338 }
5339 return 0;
5340 }
5341
5342 /**
5343 * smb2_close_pipe() - handler for closing IPC pipe
5344 * @work: smb work containing close request buffer
5345 *
5346 * Return: 0
5347 */
5348 static noinline int smb2_close_pipe(struct ksmbd_work *work)
5349 {
5350 u64 id;
5351 struct smb2_close_req *req;
5352 struct smb2_close_rsp *rsp;
5353
5354 WORK_BUFFERS(work, req, rsp);
5355
5356 id = req->VolatileFileId;
5357 ksmbd_session_rpc_close(work->sess, id);
5358
5359 rsp->StructureSize = cpu_to_le16(60);
5360 rsp->Flags = 0;
5361 rsp->Reserved = 0;
5362 rsp->CreationTime = 0;
5363 rsp->LastAccessTime = 0;
5364 rsp->LastWriteTime = 0;
5365 rsp->ChangeTime = 0;
5366 rsp->AllocationSize = 0;
5367 rsp->EndOfFile = 0;
5368 rsp->Attributes = 0;
5369
5370 return ksmbd_iov_pin_rsp(work, (void *)rsp,
5371 sizeof(struct smb2_close_rsp));
5372 }
5373
5374 /**
5375 * smb2_close() - handler for smb2 close file command
5376 * @work: smb work containing close request buffer
5377 *
5378 * Return: 0
5379 */
5380 int smb2_close(struct ksmbd_work *work)
5381 {
5382 u64 volatile_id = KSMBD_NO_FID;
5383 u64 sess_id;
5384 struct smb2_close_req *req;
5385 struct smb2_close_rsp *rsp;
5386 struct ksmbd_conn *conn = work->conn;
5387 struct ksmbd_file *fp;
5388 struct inode *inode;
5389 u64 time;
5390 int err = 0;
5391
5392 WORK_BUFFERS(work, req, rsp);
5393
5394 if (test_share_config_flag(work->tcon->share_conf,
5395 KSMBD_SHARE_FLAG_PIPE)) {
5396 ksmbd_debug(SMB, "IPC pipe close request\n");
5397 return smb2_close_pipe(work);
5398 }
5399
5400 sess_id = le64_to_cpu(req->hdr.SessionId);
5401 if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)
5402 sess_id = work->compound_sid;
5403
5404 work->compound_sid = 0;
5405 if (check_session_id(conn, sess_id)) {
5406 work->compound_sid = sess_id;
5407 } else {
5408 rsp->hdr.Status = STATUS_USER_SESSION_DELETED;
5409 if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)
5410 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
5411 err = -EBADF;
5412 goto out;
5413 }
5414
5415 if (work->next_smb2_rcv_hdr_off &&
5416 !has_file_id(req->VolatileFileId)) {
5417 if (!has_file_id(work->compound_fid)) {
5418 /* file already closed, return FILE_CLOSED */
5419 ksmbd_debug(SMB, "file already closed\n");
5420 rsp->hdr.Status = STATUS_FILE_CLOSED;
5421 err = -EBADF;
5422 goto out;
5423 } else {
5424 ksmbd_debug(SMB,
5425 "Compound request set FID = %llu:%llu\n",
5426 work->compound_fid,
5427 work->compound_pfid);
5428 volatile_id = work->compound_fid;
5429
5430 /* file closed, stored id is not valid anymore */
5431 work->compound_fid = KSMBD_NO_FID;
5432 work->compound_pfid = KSMBD_NO_FID;
5433 }
5434 } else {
5435 volatile_id = req->VolatileFileId;
5436 }
5437 ksmbd_debug(SMB, "volatile_id = %llu\n", volatile_id);
5438
5439 rsp->StructureSize = cpu_to_le16(60);
5440 rsp->Reserved = 0;
5441
5442 if (req->Flags == SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB) {
5443 fp = ksmbd_lookup_fd_fast(work, volatile_id);
5444 if (!fp) {
5445 err = -ENOENT;
5446 goto out;
5447 }
5448
5449 inode = file_inode(fp->filp);
5450 rsp->Flags = SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB;
5451 rsp->AllocationSize = S_ISDIR(inode->i_mode) ? 0 :
5452 cpu_to_le64(inode->i_blocks << 9);
5453 rsp->EndOfFile = cpu_to_le64(inode->i_size);
5454 rsp->Attributes = fp->f_ci->m_fattr;
5455 rsp->CreationTime = cpu_to_le64(fp->create_time);
5456 time = ksmbd_UnixTimeToNT(inode_get_atime(inode));
5457 rsp->LastAccessTime = cpu_to_le64(time);
5458 time = ksmbd_UnixTimeToNT(inode_get_mtime(inode));
5459 rsp->LastWriteTime = cpu_to_le64(time);
5460 time = ksmbd_UnixTimeToNT(inode_get_ctime(inode));
5461 rsp->ChangeTime = cpu_to_le64(time);
5462 ksmbd_fd_put(work, fp);
5463 } else {
5464 rsp->Flags = 0;
5465 rsp->AllocationSize = 0;
5466 rsp->EndOfFile = 0;
5467 rsp->Attributes = 0;
5468 rsp->CreationTime = 0;
5469 rsp->LastAccessTime = 0;
5470 rsp->LastWriteTime = 0;
5471 rsp->ChangeTime = 0;
5472 }
5473
5474 err = ksmbd_close_fd(work, volatile_id);
5475 out:
5476 if (!err)
5477 err = ksmbd_iov_pin_rsp(work, (void *)rsp,
5478 sizeof(struct smb2_close_rsp));
5479
5480 if (err) {
5481 if (rsp->hdr.Status == 0)
5482 rsp->hdr.Status = STATUS_FILE_CLOSED;
5483 smb2_set_err_rsp(work);
5484 }
5485
5486 return err;
5487 }
5488
5489 /**
5490 * smb2_echo() - handler for smb2 echo(ping) command
5491 * @work: smb work containing echo request buffer
5492 *
5493 * Return: 0
5494 */
5495 int smb2_echo(struct ksmbd_work *work)
5496 {
5497 struct smb2_echo_rsp *rsp = smb2_get_msg(work->response_buf);
5498
5499 if (work->next_smb2_rcv_hdr_off)
5500 rsp = ksmbd_resp_buf_next(work);
5501
5502 rsp->StructureSize = cpu_to_le16(4);
5503 rsp->Reserved = 0;
5504 return ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_echo_rsp));
5505 }
5506
5507 static int smb2_rename(struct ksmbd_work *work,
5508 struct ksmbd_file *fp,
5509 struct smb2_file_rename_info *file_info,
5510 struct nls_table *local_nls)
5511 {
5512 struct ksmbd_share_config *share = fp->tcon->share_conf;
5513 char *new_name = NULL;
5514 int rc, flags = 0;
5515
5516 ksmbd_debug(SMB, "setting FILE_RENAME_INFO\n");
5517 new_name = smb2_get_name(file_info->FileName,
5518 le32_to_cpu(file_info->FileNameLength),
5519 local_nls);
5520 if (IS_ERR(new_name))
5521 return PTR_ERR(new_name);
5522
5523 if (strchr(new_name, ':')) {
5524 int s_type;
5525 char *xattr_stream_name, *stream_name = NULL;
5526 size_t xattr_stream_size;
5527 int len;
5528
5529 rc = parse_stream_name(new_name, &stream_name, &s_type);
5530 if (rc < 0)
5531 goto out;
5532
5533 len = strlen(new_name);
5534 if (len > 0 && new_name[len - 1] != '/') {
5535 pr_err("not allow base filename in rename\n");
5536 rc = -ESHARE;
5537 goto out;
5538 }
5539
5540 rc = ksmbd_vfs_xattr_stream_name(stream_name,
5541 &xattr_stream_name,
5542 &xattr_stream_size,
5543 s_type);
5544 if (rc)
5545 goto out;
5546
5547 rc = ksmbd_vfs_setxattr(file_mnt_idmap(fp->filp),
5548 &fp->filp->f_path,
5549 xattr_stream_name,
5550 NULL, 0, 0, true);
5551 if (rc < 0) {
5552 pr_err("failed to store stream name in xattr: %d\n",
5553 rc);
5554 rc = -EINVAL;
5555 goto out;
5556 }
5557
5558 goto out;
5559 }
5560
5561 ksmbd_debug(SMB, "new name %s\n", new_name);
5562 if (ksmbd_share_veto_filename(share, new_name)) {
5563 rc = -ENOENT;
5564 ksmbd_debug(SMB, "Can't rename vetoed file: %s\n", new_name);
5565 goto out;
5566 }
5567
5568 if (!file_info->ReplaceIfExists)
5569 flags = RENAME_NOREPLACE;
5570
5571 rc = ksmbd_vfs_rename(work, &fp->filp->f_path, new_name, flags);
5572 out:
5573 kfree(new_name);
5574 return rc;
5575 }
5576
5577 static int smb2_create_link(struct ksmbd_work *work,
5578 struct ksmbd_share_config *share,
5579 struct smb2_file_link_info *file_info,
5580 unsigned int buf_len, struct file *filp,
5581 struct nls_table *local_nls)
5582 {
5583 char *link_name = NULL, *target_name = NULL, *pathname = NULL;
5584 struct path path, parent_path;
5585 bool file_present = false;
5586 int rc;
5587
5588 if (buf_len < (u64)sizeof(struct smb2_file_link_info) +
5589 le32_to_cpu(file_info->FileNameLength))
5590 return -EINVAL;
5591
5592 ksmbd_debug(SMB, "setting FILE_LINK_INFORMATION\n");
5593 pathname = kmalloc(PATH_MAX, GFP_KERNEL);
5594 if (!pathname)
5595 return -ENOMEM;
5596
5597 link_name = smb2_get_name(file_info->FileName,
5598 le32_to_cpu(file_info->FileNameLength),
5599 local_nls);
5600 if (IS_ERR(link_name) || S_ISDIR(file_inode(filp)->i_mode)) {
5601 rc = -EINVAL;
5602 goto out;
5603 }
5604
5605 ksmbd_debug(SMB, "link name is %s\n", link_name);
5606 target_name = file_path(filp, pathname, PATH_MAX);
5607 if (IS_ERR(target_name)) {
5608 rc = -EINVAL;
5609 goto out;
5610 }
5611
5612 ksmbd_debug(SMB, "target name is %s\n", target_name);
5613 rc = ksmbd_vfs_kern_path_locked(work, link_name, LOOKUP_NO_SYMLINKS,
5614 &parent_path, &path, 0);
5615 if (rc) {
5616 if (rc != -ENOENT)
5617 goto out;
5618 } else
5619 file_present = true;
5620
5621 if (file_info->ReplaceIfExists) {
5622 if (file_present) {
5623 rc = ksmbd_vfs_remove_file(work, &path);
5624 if (rc) {
5625 rc = -EINVAL;
5626 ksmbd_debug(SMB, "cannot delete %s\n",
5627 link_name);
5628 goto out;
5629 }
5630 }
5631 } else {
5632 if (file_present) {
5633 rc = -EEXIST;
5634 ksmbd_debug(SMB, "link already exists\n");
5635 goto out;
5636 }
5637 }
5638
5639 rc = ksmbd_vfs_link(work, target_name, link_name);
5640 if (rc)
5641 rc = -EINVAL;
5642 out:
5643 if (file_present)
5644 ksmbd_vfs_kern_path_unlock(&parent_path, &path);
5645
5646 if (!IS_ERR(link_name))
5647 kfree(link_name);
5648 kfree(pathname);
5649 return rc;
5650 }
5651
5652 static int set_file_basic_info(struct ksmbd_file *fp,
5653 struct smb2_file_basic_info *file_info,
5654 struct ksmbd_share_config *share)
5655 {
5656 struct iattr attrs;
5657 struct file *filp;
5658 struct inode *inode;
5659 struct mnt_idmap *idmap;
5660 int rc = 0;
5661
5662 if (!(fp->daccess & FILE_WRITE_ATTRIBUTES_LE))
5663 return -EACCES;
5664
5665 attrs.ia_valid = 0;
5666 filp = fp->filp;
5667 inode = file_inode(filp);
5668 idmap = file_mnt_idmap(filp);
5669
5670 if (file_info->CreationTime)
5671 fp->create_time = le64_to_cpu(file_info->CreationTime);
5672
5673 if (file_info->LastAccessTime) {
5674 attrs.ia_atime = ksmbd_NTtimeToUnix(file_info->LastAccessTime);
5675 attrs.ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
5676 }
5677
5678 attrs.ia_valid |= ATTR_CTIME;
5679 if (file_info->ChangeTime)
5680 attrs.ia_ctime = ksmbd_NTtimeToUnix(file_info->ChangeTime);
5681 else
5682 attrs.ia_ctime = inode_get_ctime(inode);
5683
5684 if (file_info->LastWriteTime) {
5685 attrs.ia_mtime = ksmbd_NTtimeToUnix(file_info->LastWriteTime);
5686 attrs.ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
5687 }
5688
5689 if (file_info->Attributes) {
5690 if (!S_ISDIR(inode->i_mode) &&
5691 file_info->Attributes & FILE_ATTRIBUTE_DIRECTORY_LE) {
5692 pr_err("can't change a file to a directory\n");
5693 return -EINVAL;
5694 }
5695
5696 if (!(S_ISDIR(inode->i_mode) && file_info->Attributes == FILE_ATTRIBUTE_NORMAL_LE))
5697 fp->f_ci->m_fattr = file_info->Attributes |
5698 (fp->f_ci->m_fattr & FILE_ATTRIBUTE_DIRECTORY_LE);
5699 }
5700
5701 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_STORE_DOS_ATTRS) &&
5702 (file_info->CreationTime || file_info->Attributes)) {
5703 struct xattr_dos_attrib da = {0};
5704
5705 da.version = 4;
5706 da.itime = fp->itime;
5707 da.create_time = fp->create_time;
5708 da.attr = le32_to_cpu(fp->f_ci->m_fattr);
5709 da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME |
5710 XATTR_DOSINFO_ITIME;
5711
5712 rc = ksmbd_vfs_set_dos_attrib_xattr(idmap, &filp->f_path, &da,
5713 true);
5714 if (rc)
5715 ksmbd_debug(SMB,
5716 "failed to restore file attribute in EA\n");
5717 rc = 0;
5718 }
5719
5720 if (attrs.ia_valid) {
5721 struct dentry *dentry = filp->f_path.dentry;
5722 struct inode *inode = d_inode(dentry);
5723
5724 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
5725 return -EACCES;
5726
5727 inode_lock(inode);
5728 inode_set_ctime_to_ts(inode, attrs.ia_ctime);
5729 attrs.ia_valid &= ~ATTR_CTIME;
5730 rc = notify_change(idmap, dentry, &attrs, NULL);
5731 inode_unlock(inode);
5732 }
5733 return rc;
5734 }
5735
5736 static int set_file_allocation_info(struct ksmbd_work *work,
5737 struct ksmbd_file *fp,
5738 struct smb2_file_alloc_info *file_alloc_info)
5739 {
5740 /*
5741 * TODO : It's working fine only when store dos attributes
5742 * is not yes. need to implement a logic which works
5743 * properly with any smb.conf option
5744 */
5745
5746 loff_t alloc_blks;
5747 struct inode *inode;
5748 int rc;
5749
5750 if (!(fp->daccess & FILE_WRITE_DATA_LE))
5751 return -EACCES;
5752
5753 alloc_blks = (le64_to_cpu(file_alloc_info->AllocationSize) + 511) >> 9;
5754 inode = file_inode(fp->filp);
5755
5756 if (alloc_blks > inode->i_blocks) {
5757 smb_break_all_levII_oplock(work, fp, 1);
5758 rc = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0,
5759 alloc_blks * 512);
5760 if (rc && rc != -EOPNOTSUPP) {
5761 pr_err("vfs_fallocate is failed : %d\n", rc);
5762 return rc;
5763 }
5764 } else if (alloc_blks < inode->i_blocks) {
5765 loff_t size;
5766
5767 /*
5768 * Allocation size could be smaller than original one
5769 * which means allocated blocks in file should be
5770 * deallocated. use truncate to cut out it, but inode
5771 * size is also updated with truncate offset.
5772 * inode size is retained by backup inode size.
5773 */
5774 size = i_size_read(inode);
5775 rc = ksmbd_vfs_truncate(work, fp, alloc_blks * 512);
5776 if (rc) {
5777 pr_err("truncate failed!, err %d\n", rc);
5778 return rc;
5779 }
5780 if (size < alloc_blks * 512)
5781 i_size_write(inode, size);
5782 }
5783 return 0;
5784 }
5785
5786 static int set_end_of_file_info(struct ksmbd_work *work, struct ksmbd_file *fp,
5787 struct smb2_file_eof_info *file_eof_info)
5788 {
5789 loff_t newsize;
5790 struct inode *inode;
5791 int rc;
5792
5793 if (!(fp->daccess & FILE_WRITE_DATA_LE))
5794 return -EACCES;
5795
5796 newsize = le64_to_cpu(file_eof_info->EndOfFile);
5797 inode = file_inode(fp->filp);
5798
5799 /*
5800 * If FILE_END_OF_FILE_INFORMATION of set_info_file is called
5801 * on FAT32 shared device, truncate execution time is too long
5802 * and network error could cause from windows client. because
5803 * truncate of some filesystem like FAT32 fill zero data in
5804 * truncated range.
5805 */
5806 if (inode->i_sb->s_magic != MSDOS_SUPER_MAGIC) {
5807 ksmbd_debug(SMB, "truncated to newsize %lld\n", newsize);
5808 rc = ksmbd_vfs_truncate(work, fp, newsize);
5809 if (rc) {
5810 ksmbd_debug(SMB, "truncate failed!, err %d\n", rc);
5811 if (rc != -EAGAIN)
5812 rc = -EBADF;
5813 return rc;
5814 }
5815 }
5816 return 0;
5817 }
5818
5819 static int set_rename_info(struct ksmbd_work *work, struct ksmbd_file *fp,
5820 struct smb2_file_rename_info *rename_info,
5821 unsigned int buf_len)
5822 {
5823 if (!(fp->daccess & FILE_DELETE_LE)) {
5824 pr_err("no right to delete : 0x%x\n", fp->daccess);
5825 return -EACCES;
5826 }
5827
5828 if (buf_len < (u64)sizeof(struct smb2_file_rename_info) +
5829 le32_to_cpu(rename_info->FileNameLength))
5830 return -EINVAL;
5831
5832 if (!le32_to_cpu(rename_info->FileNameLength))
5833 return -EINVAL;
5834
5835 return smb2_rename(work, fp, rename_info, work->conn->local_nls);
5836 }
5837
5838 static int set_file_disposition_info(struct ksmbd_file *fp,
5839 struct smb2_file_disposition_info *file_info)
5840 {
5841 struct inode *inode;
5842
5843 if (!(fp->daccess & FILE_DELETE_LE)) {
5844 pr_err("no right to delete : 0x%x\n", fp->daccess);
5845 return -EACCES;
5846 }
5847
5848 inode = file_inode(fp->filp);
5849 if (file_info->DeletePending) {
5850 if (S_ISDIR(inode->i_mode) &&
5851 ksmbd_vfs_empty_dir(fp) == -ENOTEMPTY)
5852 return -EBUSY;
5853 ksmbd_set_inode_pending_delete(fp);
5854 } else {
5855 ksmbd_clear_inode_pending_delete(fp);
5856 }
5857 return 0;
5858 }
5859
5860 static int set_file_position_info(struct ksmbd_file *fp,
5861 struct smb2_file_pos_info *file_info)
5862 {
5863 loff_t current_byte_offset;
5864 unsigned long sector_size;
5865 struct inode *inode;
5866
5867 inode = file_inode(fp->filp);
5868 current_byte_offset = le64_to_cpu(file_info->CurrentByteOffset);
5869 sector_size = inode->i_sb->s_blocksize;
5870
5871 if (current_byte_offset < 0 ||
5872 (fp->coption == FILE_NO_INTERMEDIATE_BUFFERING_LE &&
5873 current_byte_offset & (sector_size - 1))) {
5874 pr_err("CurrentByteOffset is not valid : %llu\n",
5875 current_byte_offset);
5876 return -EINVAL;
5877 }
5878
5879 fp->filp->f_pos = current_byte_offset;
5880 return 0;
5881 }
5882
5883 static int set_file_mode_info(struct ksmbd_file *fp,
5884 struct smb2_file_mode_info *file_info)
5885 {
5886 __le32 mode;
5887
5888 mode = file_info->Mode;
5889
5890 if ((mode & ~FILE_MODE_INFO_MASK)) {
5891 pr_err("Mode is not valid : 0x%x\n", le32_to_cpu(mode));
5892 return -EINVAL;
5893 }
5894
5895 /*
5896 * TODO : need to implement consideration for
5897 * FILE_SYNCHRONOUS_IO_ALERT and FILE_SYNCHRONOUS_IO_NONALERT
5898 */
5899 ksmbd_vfs_set_fadvise(fp->filp, mode);
5900 fp->coption = mode;
5901 return 0;
5902 }
5903
5904 /**
5905 * smb2_set_info_file() - handler for smb2 set info command
5906 * @work: smb work containing set info command buffer
5907 * @fp: ksmbd_file pointer
5908 * @req: request buffer pointer
5909 * @share: ksmbd_share_config pointer
5910 *
5911 * Return: 0 on success, otherwise error
5912 * TODO: need to implement an error handling for STATUS_INFO_LENGTH_MISMATCH
5913 */
5914 static int smb2_set_info_file(struct ksmbd_work *work, struct ksmbd_file *fp,
5915 struct smb2_set_info_req *req,
5916 struct ksmbd_share_config *share)
5917 {
5918 unsigned int buf_len = le32_to_cpu(req->BufferLength);
5919
5920 switch (req->FileInfoClass) {
5921 case FILE_BASIC_INFORMATION:
5922 {
5923 if (buf_len < sizeof(struct smb2_file_basic_info))
5924 return -EINVAL;
5925
5926 return set_file_basic_info(fp, (struct smb2_file_basic_info *)req->Buffer, share);
5927 }
5928 case FILE_ALLOCATION_INFORMATION:
5929 {
5930 if (buf_len < sizeof(struct smb2_file_alloc_info))
5931 return -EINVAL;
5932
5933 return set_file_allocation_info(work, fp,
5934 (struct smb2_file_alloc_info *)req->Buffer);
5935 }
5936 case FILE_END_OF_FILE_INFORMATION:
5937 {
5938 if (buf_len < sizeof(struct smb2_file_eof_info))
5939 return -EINVAL;
5940
5941 return set_end_of_file_info(work, fp,
5942 (struct smb2_file_eof_info *)req->Buffer);
5943 }
5944 case FILE_RENAME_INFORMATION:
5945 {
5946 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
5947 ksmbd_debug(SMB,
5948 "User does not have write permission\n");
5949 return -EACCES;
5950 }
5951
5952 if (buf_len < sizeof(struct smb2_file_rename_info))
5953 return -EINVAL;
5954
5955 return set_rename_info(work, fp,
5956 (struct smb2_file_rename_info *)req->Buffer,
5957 buf_len);
5958 }
5959 case FILE_LINK_INFORMATION:
5960 {
5961 if (buf_len < sizeof(struct smb2_file_link_info))
5962 return -EINVAL;
5963
5964 return smb2_create_link(work, work->tcon->share_conf,
5965 (struct smb2_file_link_info *)req->Buffer,
5966 buf_len, fp->filp,
5967 work->conn->local_nls);
5968 }
5969 case FILE_DISPOSITION_INFORMATION:
5970 {
5971 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
5972 ksmbd_debug(SMB,
5973 "User does not have write permission\n");
5974 return -EACCES;
5975 }
5976
5977 if (buf_len < sizeof(struct smb2_file_disposition_info))
5978 return -EINVAL;
5979
5980 return set_file_disposition_info(fp,
5981 (struct smb2_file_disposition_info *)req->Buffer);
5982 }
5983 case FILE_FULL_EA_INFORMATION:
5984 {
5985 if (!(fp->daccess & FILE_WRITE_EA_LE)) {
5986 pr_err("Not permitted to write ext attr: 0x%x\n",
5987 fp->daccess);
5988 return -EACCES;
5989 }
5990
5991 if (buf_len < sizeof(struct smb2_ea_info))
5992 return -EINVAL;
5993
5994 return smb2_set_ea((struct smb2_ea_info *)req->Buffer,
5995 buf_len, &fp->filp->f_path);
5996 }
5997 case FILE_POSITION_INFORMATION:
5998 {
5999 if (buf_len < sizeof(struct smb2_file_pos_info))
6000 return -EINVAL;
6001
6002 return set_file_position_info(fp, (struct smb2_file_pos_info *)req->Buffer);
6003 }
6004 case FILE_MODE_INFORMATION:
6005 {
6006 if (buf_len < sizeof(struct smb2_file_mode_info))
6007 return -EINVAL;
6008
6009 return set_file_mode_info(fp, (struct smb2_file_mode_info *)req->Buffer);
6010 }
6011 }
6012
6013 pr_err("Unimplemented Fileinfoclass :%d\n", req->FileInfoClass);
6014 return -EOPNOTSUPP;
6015 }
6016
6017 static int smb2_set_info_sec(struct ksmbd_file *fp, int addition_info,
6018 char *buffer, int buf_len)
6019 {
6020 struct smb_ntsd *pntsd = (struct smb_ntsd *)buffer;
6021
6022 fp->saccess |= FILE_SHARE_DELETE_LE;
6023
6024 return set_info_sec(fp->conn, fp->tcon, &fp->filp->f_path, pntsd,
6025 buf_len, false, true);
6026 }
6027
6028 /**
6029 * smb2_set_info() - handler for smb2 set info command handler
6030 * @work: smb work containing set info request buffer
6031 *
6032 * Return: 0 on success, otherwise error
6033 */
6034 int smb2_set_info(struct ksmbd_work *work)
6035 {
6036 struct smb2_set_info_req *req;
6037 struct smb2_set_info_rsp *rsp;
6038 struct ksmbd_file *fp;
6039 int rc = 0;
6040 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
6041
6042 ksmbd_debug(SMB, "Received set info request\n");
6043
6044 if (work->next_smb2_rcv_hdr_off) {
6045 req = ksmbd_req_buf_next(work);
6046 rsp = ksmbd_resp_buf_next(work);
6047 if (!has_file_id(req->VolatileFileId)) {
6048 ksmbd_debug(SMB, "Compound request set FID = %llu\n",
6049 work->compound_fid);
6050 id = work->compound_fid;
6051 pid = work->compound_pfid;
6052 }
6053 } else {
6054 req = smb2_get_msg(work->request_buf);
6055 rsp = smb2_get_msg(work->response_buf);
6056 }
6057
6058 if (!has_file_id(id)) {
6059 id = req->VolatileFileId;
6060 pid = req->PersistentFileId;
6061 }
6062
6063 fp = ksmbd_lookup_fd_slow(work, id, pid);
6064 if (!fp) {
6065 ksmbd_debug(SMB, "Invalid id for close: %u\n", id);
6066 rc = -ENOENT;
6067 goto err_out;
6068 }
6069
6070 switch (req->InfoType) {
6071 case SMB2_O_INFO_FILE:
6072 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n");
6073 rc = smb2_set_info_file(work, fp, req, work->tcon->share_conf);
6074 break;
6075 case SMB2_O_INFO_SECURITY:
6076 ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n");
6077 if (ksmbd_override_fsids(work)) {
6078 rc = -ENOMEM;
6079 goto err_out;
6080 }
6081 rc = smb2_set_info_sec(fp,
6082 le32_to_cpu(req->AdditionalInformation),
6083 req->Buffer,
6084 le32_to_cpu(req->BufferLength));
6085 ksmbd_revert_fsids(work);
6086 break;
6087 default:
6088 rc = -EOPNOTSUPP;
6089 }
6090
6091 if (rc < 0)
6092 goto err_out;
6093
6094 rsp->StructureSize = cpu_to_le16(2);
6095 rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
6096 sizeof(struct smb2_set_info_rsp));
6097 if (rc)
6098 goto err_out;
6099 ksmbd_fd_put(work, fp);
6100 return 0;
6101
6102 err_out:
6103 if (rc == -EACCES || rc == -EPERM || rc == -EXDEV)
6104 rsp->hdr.Status = STATUS_ACCESS_DENIED;
6105 else if (rc == -EINVAL)
6106 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6107 else if (rc == -ESHARE)
6108 rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6109 else if (rc == -ENOENT)
6110 rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID;
6111 else if (rc == -EBUSY || rc == -ENOTEMPTY)
6112 rsp->hdr.Status = STATUS_DIRECTORY_NOT_EMPTY;
6113 else if (rc == -EAGAIN)
6114 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6115 else if (rc == -EBADF || rc == -ESTALE)
6116 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6117 else if (rc == -EEXIST)
6118 rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION;
6119 else if (rsp->hdr.Status == 0 || rc == -EOPNOTSUPP)
6120 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
6121 smb2_set_err_rsp(work);
6122 ksmbd_fd_put(work, fp);
6123 ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n", rc);
6124 return rc;
6125 }
6126
6127 /**
6128 * smb2_read_pipe() - handler for smb2 read from IPC pipe
6129 * @work: smb work containing read IPC pipe command buffer
6130 *
6131 * Return: 0 on success, otherwise error
6132 */
6133 static noinline int smb2_read_pipe(struct ksmbd_work *work)
6134 {
6135 int nbytes = 0, err;
6136 u64 id;
6137 struct ksmbd_rpc_command *rpc_resp;
6138 struct smb2_read_req *req;
6139 struct smb2_read_rsp *rsp;
6140
6141 WORK_BUFFERS(work, req, rsp);
6142
6143 id = req->VolatileFileId;
6144
6145 rpc_resp = ksmbd_rpc_read(work->sess, id);
6146 if (rpc_resp) {
6147 void *aux_payload_buf;
6148
6149 if (rpc_resp->flags != KSMBD_RPC_OK) {
6150 err = -EINVAL;
6151 goto out;
6152 }
6153
6154 aux_payload_buf =
6155 kvmalloc(rpc_resp->payload_sz, GFP_KERNEL);
6156 if (!aux_payload_buf) {
6157 err = -ENOMEM;
6158 goto out;
6159 }
6160
6161 memcpy(aux_payload_buf, rpc_resp->payload, rpc_resp->payload_sz);
6162
6163 nbytes = rpc_resp->payload_sz;
6164 err = ksmbd_iov_pin_rsp_read(work, (void *)rsp,
6165 offsetof(struct smb2_read_rsp, Buffer),
6166 aux_payload_buf, nbytes);
6167 if (err)
6168 goto out;
6169 kvfree(rpc_resp);
6170 } else {
6171 err = ksmbd_iov_pin_rsp(work, (void *)rsp,
6172 offsetof(struct smb2_read_rsp, Buffer));
6173 if (err)
6174 goto out;
6175 }
6176
6177 rsp->StructureSize = cpu_to_le16(17);
6178 rsp->DataOffset = 80;
6179 rsp->Reserved = 0;
6180 rsp->DataLength = cpu_to_le32(nbytes);
6181 rsp->DataRemaining = 0;
6182 rsp->Flags = 0;
6183 return 0;
6184
6185 out:
6186 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
6187 smb2_set_err_rsp(work);
6188 kvfree(rpc_resp);
6189 return err;
6190 }
6191
6192 static int smb2_set_remote_key_for_rdma(struct ksmbd_work *work,
6193 struct smb2_buffer_desc_v1 *desc,
6194 __le32 Channel,
6195 __le16 ChannelInfoLength)
6196 {
6197 unsigned int i, ch_count;
6198
6199 if (work->conn->dialect == SMB30_PROT_ID &&
6200 Channel != SMB2_CHANNEL_RDMA_V1)
6201 return -EINVAL;
6202
6203 ch_count = le16_to_cpu(ChannelInfoLength) / sizeof(*desc);
6204 if (ksmbd_debug_types & KSMBD_DEBUG_RDMA) {
6205 for (i = 0; i < ch_count; i++) {
6206 pr_info("RDMA r/w request %#x: token %#x, length %#x\n",
6207 i,
6208 le32_to_cpu(desc[i].token),
6209 le32_to_cpu(desc[i].length));
6210 }
6211 }
6212 if (!ch_count)
6213 return -EINVAL;
6214
6215 work->need_invalidate_rkey =
6216 (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE);
6217 if (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE)
6218 work->remote_key = le32_to_cpu(desc->token);
6219 return 0;
6220 }
6221
6222 static ssize_t smb2_read_rdma_channel(struct ksmbd_work *work,
6223 struct smb2_read_req *req, void *data_buf,
6224 size_t length)
6225 {
6226 int err;
6227
6228 err = ksmbd_conn_rdma_write(work->conn, data_buf, length,
6229 (struct smb2_buffer_desc_v1 *)
6230 ((char *)req + le16_to_cpu(req->ReadChannelInfoOffset)),
6231 le16_to_cpu(req->ReadChannelInfoLength));
6232 if (err)
6233 return err;
6234
6235 return length;
6236 }
6237
6238 /**
6239 * smb2_read() - handler for smb2 read from file
6240 * @work: smb work containing read command buffer
6241 *
6242 * Return: 0 on success, otherwise error
6243 */
6244 int smb2_read(struct ksmbd_work *work)
6245 {
6246 struct ksmbd_conn *conn = work->conn;
6247 struct smb2_read_req *req;
6248 struct smb2_read_rsp *rsp;
6249 struct ksmbd_file *fp = NULL;
6250 loff_t offset;
6251 size_t length, mincount;
6252 ssize_t nbytes = 0, remain_bytes = 0;
6253 int err = 0;
6254 bool is_rdma_channel = false;
6255 unsigned int max_read_size = conn->vals->max_read_size;
6256 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
6257 void *aux_payload_buf;
6258
6259 if (test_share_config_flag(work->tcon->share_conf,
6260 KSMBD_SHARE_FLAG_PIPE)) {
6261 ksmbd_debug(SMB, "IPC pipe read request\n");
6262 return smb2_read_pipe(work);
6263 }
6264
6265 if (work->next_smb2_rcv_hdr_off) {
6266 req = ksmbd_req_buf_next(work);
6267 rsp = ksmbd_resp_buf_next(work);
6268 if (!has_file_id(req->VolatileFileId)) {
6269 ksmbd_debug(SMB, "Compound request set FID = %llu\n",
6270 work->compound_fid);
6271 id = work->compound_fid;
6272 pid = work->compound_pfid;
6273 }
6274 } else {
6275 req = smb2_get_msg(work->request_buf);
6276 rsp = smb2_get_msg(work->response_buf);
6277 }
6278
6279 if (!has_file_id(id)) {
6280 id = req->VolatileFileId;
6281 pid = req->PersistentFileId;
6282 }
6283
6284 if (req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE ||
6285 req->Channel == SMB2_CHANNEL_RDMA_V1) {
6286 is_rdma_channel = true;
6287 max_read_size = get_smbd_max_read_write_size();
6288 }
6289
6290 if (is_rdma_channel == true) {
6291 unsigned int ch_offset = le16_to_cpu(req->ReadChannelInfoOffset);
6292
6293 if (ch_offset < offsetof(struct smb2_read_req, Buffer)) {
6294 err = -EINVAL;
6295 goto out;
6296 }
6297 err = smb2_set_remote_key_for_rdma(work,
6298 (struct smb2_buffer_desc_v1 *)
6299 ((char *)req + ch_offset),
6300 req->Channel,
6301 req->ReadChannelInfoLength);
6302 if (err)
6303 goto out;
6304 }
6305
6306 fp = ksmbd_lookup_fd_slow(work, id, pid);
6307 if (!fp) {
6308 err = -ENOENT;
6309 goto out;
6310 }
6311
6312 if (!(fp->daccess & (FILE_READ_DATA_LE | FILE_READ_ATTRIBUTES_LE))) {
6313 pr_err("Not permitted to read : 0x%x\n", fp->daccess);
6314 err = -EACCES;
6315 goto out;
6316 }
6317
6318 offset = le64_to_cpu(req->Offset);
6319 length = le32_to_cpu(req->Length);
6320 mincount = le32_to_cpu(req->MinimumCount);
6321
6322 if (length > max_read_size) {
6323 ksmbd_debug(SMB, "limiting read size to max size(%u)\n",
6324 max_read_size);
6325 err = -EINVAL;
6326 goto out;
6327 }
6328
6329 ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n",
6330 fp->filp, offset, length);
6331
6332 aux_payload_buf = kvzalloc(length, GFP_KERNEL);
6333 if (!aux_payload_buf) {
6334 err = -ENOMEM;
6335 goto out;
6336 }
6337
6338 nbytes = ksmbd_vfs_read(work, fp, length, &offset, aux_payload_buf);
6339 if (nbytes < 0) {
6340 err = nbytes;
6341 goto out;
6342 }
6343
6344 if ((nbytes == 0 && length != 0) || nbytes < mincount) {
6345 kvfree(aux_payload_buf);
6346 rsp->hdr.Status = STATUS_END_OF_FILE;
6347 smb2_set_err_rsp(work);
6348 ksmbd_fd_put(work, fp);
6349 return 0;
6350 }
6351
6352 ksmbd_debug(SMB, "nbytes %zu, offset %lld mincount %zu\n",
6353 nbytes, offset, mincount);
6354
6355 if (is_rdma_channel == true) {
6356 /* write data to the client using rdma channel */
6357 remain_bytes = smb2_read_rdma_channel(work, req,
6358 aux_payload_buf,
6359 nbytes);
6360 kvfree(aux_payload_buf);
6361 aux_payload_buf = NULL;
6362 nbytes = 0;
6363 if (remain_bytes < 0) {
6364 err = (int)remain_bytes;
6365 goto out;
6366 }
6367 }
6368
6369 rsp->StructureSize = cpu_to_le16(17);
6370 rsp->DataOffset = 80;
6371 rsp->Reserved = 0;
6372 rsp->DataLength = cpu_to_le32(nbytes);
6373 rsp->DataRemaining = cpu_to_le32(remain_bytes);
6374 rsp->Flags = 0;
6375 err = ksmbd_iov_pin_rsp_read(work, (void *)rsp,
6376 offsetof(struct smb2_read_rsp, Buffer),
6377 aux_payload_buf, nbytes);
6378 if (err)
6379 goto out;
6380 ksmbd_fd_put(work, fp);
6381 return 0;
6382
6383 out:
6384 if (err) {
6385 if (err == -EISDIR)
6386 rsp->hdr.Status = STATUS_INVALID_DEVICE_REQUEST;
6387 else if (err == -EAGAIN)
6388 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6389 else if (err == -ENOENT)
6390 rsp->hdr.Status = STATUS_FILE_CLOSED;
6391 else if (err == -EACCES)
6392 rsp->hdr.Status = STATUS_ACCESS_DENIED;
6393 else if (err == -ESHARE)
6394 rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6395 else if (err == -EINVAL)
6396 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6397 else
6398 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6399
6400 smb2_set_err_rsp(work);
6401 }
6402 ksmbd_fd_put(work, fp);
6403 return err;
6404 }
6405
6406 /**
6407 * smb2_write_pipe() - handler for smb2 write on IPC pipe
6408 * @work: smb work containing write IPC pipe command buffer
6409 *
6410 * Return: 0 on success, otherwise error
6411 */
6412 static noinline int smb2_write_pipe(struct ksmbd_work *work)
6413 {
6414 struct smb2_write_req *req;
6415 struct smb2_write_rsp *rsp;
6416 struct ksmbd_rpc_command *rpc_resp;
6417 u64 id = 0;
6418 int err = 0, ret = 0;
6419 char *data_buf;
6420 size_t length;
6421
6422 WORK_BUFFERS(work, req, rsp);
6423
6424 length = le32_to_cpu(req->Length);
6425 id = req->VolatileFileId;
6426
6427 if ((u64)le16_to_cpu(req->DataOffset) + length >
6428 get_rfc1002_len(work->request_buf)) {
6429 pr_err("invalid write data offset %u, smb_len %u\n",
6430 le16_to_cpu(req->DataOffset),
6431 get_rfc1002_len(work->request_buf));
6432 err = -EINVAL;
6433 goto out;
6434 }
6435
6436 data_buf = (char *)(((char *)&req->hdr.ProtocolId) +
6437 le16_to_cpu(req->DataOffset));
6438
6439 rpc_resp = ksmbd_rpc_write(work->sess, id, data_buf, length);
6440 if (rpc_resp) {
6441 if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) {
6442 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
6443 kvfree(rpc_resp);
6444 smb2_set_err_rsp(work);
6445 return -EOPNOTSUPP;
6446 }
6447 if (rpc_resp->flags != KSMBD_RPC_OK) {
6448 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6449 smb2_set_err_rsp(work);
6450 kvfree(rpc_resp);
6451 return ret;
6452 }
6453 kvfree(rpc_resp);
6454 }
6455
6456 rsp->StructureSize = cpu_to_le16(17);
6457 rsp->DataOffset = 0;
6458 rsp->Reserved = 0;
6459 rsp->DataLength = cpu_to_le32(length);
6460 rsp->DataRemaining = 0;
6461 rsp->Reserved2 = 0;
6462 err = ksmbd_iov_pin_rsp(work, (void *)rsp,
6463 offsetof(struct smb2_write_rsp, Buffer));
6464 out:
6465 if (err) {
6466 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6467 smb2_set_err_rsp(work);
6468 }
6469
6470 return err;
6471 }
6472
6473 static ssize_t smb2_write_rdma_channel(struct ksmbd_work *work,
6474 struct smb2_write_req *req,
6475 struct ksmbd_file *fp,
6476 loff_t offset, size_t length, bool sync)
6477 {
6478 char *data_buf;
6479 int ret;
6480 ssize_t nbytes;
6481
6482 data_buf = kvzalloc(length, GFP_KERNEL);
6483 if (!data_buf)
6484 return -ENOMEM;
6485
6486 ret = ksmbd_conn_rdma_read(work->conn, data_buf, length,
6487 (struct smb2_buffer_desc_v1 *)
6488 ((char *)req + le16_to_cpu(req->WriteChannelInfoOffset)),
6489 le16_to_cpu(req->WriteChannelInfoLength));
6490 if (ret < 0) {
6491 kvfree(data_buf);
6492 return ret;
6493 }
6494
6495 ret = ksmbd_vfs_write(work, fp, data_buf, length, &offset, sync, &nbytes);
6496 kvfree(data_buf);
6497 if (ret < 0)
6498 return ret;
6499
6500 return nbytes;
6501 }
6502
6503 /**
6504 * smb2_write() - handler for smb2 write from file
6505 * @work: smb work containing write command buffer
6506 *
6507 * Return: 0 on success, otherwise error
6508 */
6509 int smb2_write(struct ksmbd_work *work)
6510 {
6511 struct smb2_write_req *req;
6512 struct smb2_write_rsp *rsp;
6513 struct ksmbd_file *fp = NULL;
6514 loff_t offset;
6515 size_t length;
6516 ssize_t nbytes;
6517 char *data_buf;
6518 bool writethrough = false, is_rdma_channel = false;
6519 int err = 0;
6520 unsigned int max_write_size = work->conn->vals->max_write_size;
6521
6522 WORK_BUFFERS(work, req, rsp);
6523
6524 if (test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_PIPE)) {
6525 ksmbd_debug(SMB, "IPC pipe write request\n");
6526 return smb2_write_pipe(work);
6527 }
6528
6529 offset = le64_to_cpu(req->Offset);
6530 length = le32_to_cpu(req->Length);
6531
6532 if (req->Channel == SMB2_CHANNEL_RDMA_V1 ||
6533 req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE) {
6534 is_rdma_channel = true;
6535 max_write_size = get_smbd_max_read_write_size();
6536 length = le32_to_cpu(req->RemainingBytes);
6537 }
6538
6539 if (is_rdma_channel == true) {
6540 unsigned int ch_offset = le16_to_cpu(req->WriteChannelInfoOffset);
6541
6542 if (req->Length != 0 || req->DataOffset != 0 ||
6543 ch_offset < offsetof(struct smb2_write_req, Buffer)) {
6544 err = -EINVAL;
6545 goto out;
6546 }
6547 err = smb2_set_remote_key_for_rdma(work,
6548 (struct smb2_buffer_desc_v1 *)
6549 ((char *)req + ch_offset),
6550 req->Channel,
6551 req->WriteChannelInfoLength);
6552 if (err)
6553 goto out;
6554 }
6555
6556 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
6557 ksmbd_debug(SMB, "User does not have write permission\n");
6558 err = -EACCES;
6559 goto out;
6560 }
6561
6562 fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
6563 if (!fp) {
6564 err = -ENOENT;
6565 goto out;
6566 }
6567
6568 if (!(fp->daccess & (FILE_WRITE_DATA_LE | FILE_READ_ATTRIBUTES_LE))) {
6569 pr_err("Not permitted to write : 0x%x\n", fp->daccess);
6570 err = -EACCES;
6571 goto out;
6572 }
6573
6574 if (length > max_write_size) {
6575 ksmbd_debug(SMB, "limiting write size to max size(%u)\n",
6576 max_write_size);
6577 err = -EINVAL;
6578 goto out;
6579 }
6580
6581 ksmbd_debug(SMB, "flags %u\n", le32_to_cpu(req->Flags));
6582 if (le32_to_cpu(req->Flags) & SMB2_WRITEFLAG_WRITE_THROUGH)
6583 writethrough = true;
6584
6585 if (is_rdma_channel == false) {
6586 if (le16_to_cpu(req->DataOffset) <
6587 offsetof(struct smb2_write_req, Buffer)) {
6588 err = -EINVAL;
6589 goto out;
6590 }
6591
6592 data_buf = (char *)(((char *)&req->hdr.ProtocolId) +
6593 le16_to_cpu(req->DataOffset));
6594
6595 ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n",
6596 fp->filp, offset, length);
6597 err = ksmbd_vfs_write(work, fp, data_buf, length, &offset,
6598 writethrough, &nbytes);
6599 if (err < 0)
6600 goto out;
6601 } else {
6602 /* read data from the client using rdma channel, and
6603 * write the data.
6604 */
6605 nbytes = smb2_write_rdma_channel(work, req, fp, offset, length,
6606 writethrough);
6607 if (nbytes < 0) {
6608 err = (int)nbytes;
6609 goto out;
6610 }
6611 }
6612
6613 rsp->StructureSize = cpu_to_le16(17);
6614 rsp->DataOffset = 0;
6615 rsp->Reserved = 0;
6616 rsp->DataLength = cpu_to_le32(nbytes);
6617 rsp->DataRemaining = 0;
6618 rsp->Reserved2 = 0;
6619 err = ksmbd_iov_pin_rsp(work, rsp, offsetof(struct smb2_write_rsp, Buffer));
6620 if (err)
6621 goto out;
6622 ksmbd_fd_put(work, fp);
6623 return 0;
6624
6625 out:
6626 if (err == -EAGAIN)
6627 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6628 else if (err == -ENOSPC || err == -EFBIG)
6629 rsp->hdr.Status = STATUS_DISK_FULL;
6630 else if (err == -ENOENT)
6631 rsp->hdr.Status = STATUS_FILE_CLOSED;
6632 else if (err == -EACCES)
6633 rsp->hdr.Status = STATUS_ACCESS_DENIED;
6634 else if (err == -ESHARE)
6635 rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6636 else if (err == -EINVAL)
6637 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6638 else
6639 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6640
6641 smb2_set_err_rsp(work);
6642 ksmbd_fd_put(work, fp);
6643 return err;
6644 }
6645
6646 /**
6647 * smb2_flush() - handler for smb2 flush file - fsync
6648 * @work: smb work containing flush command buffer
6649 *
6650 * Return: 0 on success, otherwise error
6651 */
6652 int smb2_flush(struct ksmbd_work *work)
6653 {
6654 struct smb2_flush_req *req;
6655 struct smb2_flush_rsp *rsp;
6656 int err;
6657
6658 WORK_BUFFERS(work, req, rsp);
6659
6660 ksmbd_debug(SMB, "SMB2_FLUSH called for fid %llu\n", req->VolatileFileId);
6661
6662 err = ksmbd_vfs_fsync(work, req->VolatileFileId, req->PersistentFileId);
6663 if (err)
6664 goto out;
6665
6666 rsp->StructureSize = cpu_to_le16(4);
6667 rsp->Reserved = 0;
6668 return ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_flush_rsp));
6669
6670 out:
6671 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6672 smb2_set_err_rsp(work);
6673 return err;
6674 }
6675
6676 /**
6677 * smb2_cancel() - handler for smb2 cancel command
6678 * @work: smb work containing cancel command buffer
6679 *
6680 * Return: 0 on success, otherwise error
6681 */
6682 int smb2_cancel(struct ksmbd_work *work)
6683 {
6684 struct ksmbd_conn *conn = work->conn;
6685 struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
6686 struct smb2_hdr *chdr;
6687 struct ksmbd_work *iter;
6688 struct list_head *command_list;
6689
6690 if (work->next_smb2_rcv_hdr_off)
6691 hdr = ksmbd_resp_buf_next(work);
6692
6693 ksmbd_debug(SMB, "smb2 cancel called on mid %llu, async flags 0x%x\n",
6694 hdr->MessageId, hdr->Flags);
6695
6696 if (hdr->Flags & SMB2_FLAGS_ASYNC_COMMAND) {
6697 command_list = &conn->async_requests;
6698
6699 spin_lock(&conn->request_lock);
6700 list_for_each_entry(iter, command_list,
6701 async_request_entry) {
6702 chdr = smb2_get_msg(iter->request_buf);
6703
6704 if (iter->async_id !=
6705 le64_to_cpu(hdr->Id.AsyncId))
6706 continue;
6707
6708 ksmbd_debug(SMB,
6709 "smb2 with AsyncId %llu cancelled command = 0x%x\n",
6710 le64_to_cpu(hdr->Id.AsyncId),
6711 le16_to_cpu(chdr->Command));
6712 iter->state = KSMBD_WORK_CANCELLED;
6713 if (iter->cancel_fn)
6714 iter->cancel_fn(iter->cancel_argv);
6715 break;
6716 }
6717 spin_unlock(&conn->request_lock);
6718 } else {
6719 command_list = &conn->requests;
6720
6721 spin_lock(&conn->request_lock);
6722 list_for_each_entry(iter, command_list, request_entry) {
6723 chdr = smb2_get_msg(iter->request_buf);
6724
6725 if (chdr->MessageId != hdr->MessageId ||
6726 iter == work)
6727 continue;
6728
6729 ksmbd_debug(SMB,
6730 "smb2 with mid %llu cancelled command = 0x%x\n",
6731 le64_to_cpu(hdr->MessageId),
6732 le16_to_cpu(chdr->Command));
6733 iter->state = KSMBD_WORK_CANCELLED;
6734 break;
6735 }
6736 spin_unlock(&conn->request_lock);
6737 }
6738
6739 /* For SMB2_CANCEL command itself send no response*/
6740 work->send_no_response = 1;
6741 return 0;
6742 }
6743
6744 struct file_lock *smb_flock_init(struct file *f)
6745 {
6746 struct file_lock *fl;
6747
6748 fl = locks_alloc_lock();
6749 if (!fl)
6750 goto out;
6751
6752 locks_init_lock(fl);
6753
6754 fl->fl_owner = f;
6755 fl->fl_pid = current->tgid;
6756 fl->fl_file = f;
6757 fl->fl_flags = FL_POSIX;
6758 fl->fl_ops = NULL;
6759 fl->fl_lmops = NULL;
6760
6761 out:
6762 return fl;
6763 }
6764
6765 static int smb2_set_flock_flags(struct file_lock *flock, int flags)
6766 {
6767 int cmd = -EINVAL;
6768
6769 /* Checking for wrong flag combination during lock request*/
6770 switch (flags) {
6771 case SMB2_LOCKFLAG_SHARED:
6772 ksmbd_debug(SMB, "received shared request\n");
6773 cmd = F_SETLKW;
6774 flock->fl_type = F_RDLCK;
6775 flock->fl_flags |= FL_SLEEP;
6776 break;
6777 case SMB2_LOCKFLAG_EXCLUSIVE:
6778 ksmbd_debug(SMB, "received exclusive request\n");
6779 cmd = F_SETLKW;
6780 flock->fl_type = F_WRLCK;
6781 flock->fl_flags |= FL_SLEEP;
6782 break;
6783 case SMB2_LOCKFLAG_SHARED | SMB2_LOCKFLAG_FAIL_IMMEDIATELY:
6784 ksmbd_debug(SMB,
6785 "received shared & fail immediately request\n");
6786 cmd = F_SETLK;
6787 flock->fl_type = F_RDLCK;
6788 break;
6789 case SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_FAIL_IMMEDIATELY:
6790 ksmbd_debug(SMB,
6791 "received exclusive & fail immediately request\n");
6792 cmd = F_SETLK;
6793 flock->fl_type = F_WRLCK;
6794 break;
6795 case SMB2_LOCKFLAG_UNLOCK:
6796 ksmbd_debug(SMB, "received unlock request\n");
6797 flock->fl_type = F_UNLCK;
6798 cmd = F_SETLK;
6799 break;
6800 }
6801
6802 return cmd;
6803 }
6804
6805 static struct ksmbd_lock *smb2_lock_init(struct file_lock *flock,
6806 unsigned int cmd, int flags,
6807 struct list_head *lock_list)
6808 {
6809 struct ksmbd_lock *lock;
6810
6811 lock = kzalloc(sizeof(struct ksmbd_lock), GFP_KERNEL);
6812 if (!lock)
6813 return NULL;
6814
6815 lock->cmd = cmd;
6816 lock->fl = flock;
6817 lock->start = flock->fl_start;
6818 lock->end = flock->fl_end;
6819 lock->flags = flags;
6820 if (lock->start == lock->end)
6821 lock->zero_len = 1;
6822 INIT_LIST_HEAD(&lock->clist);
6823 INIT_LIST_HEAD(&lock->flist);
6824 INIT_LIST_HEAD(&lock->llist);
6825 list_add_tail(&lock->llist, lock_list);
6826
6827 return lock;
6828 }
6829
6830 static void smb2_remove_blocked_lock(void **argv)
6831 {
6832 struct file_lock *flock = (struct file_lock *)argv[0];
6833
6834 ksmbd_vfs_posix_lock_unblock(flock);
6835 wake_up(&flock->fl_wait);
6836 }
6837
6838 static inline bool lock_defer_pending(struct file_lock *fl)
6839 {
6840 /* check pending lock waiters */
6841 return waitqueue_active(&fl->fl_wait);
6842 }
6843
6844 /**
6845 * smb2_lock() - handler for smb2 file lock command
6846 * @work: smb work containing lock command buffer
6847 *
6848 * Return: 0 on success, otherwise error
6849 */
6850 int smb2_lock(struct ksmbd_work *work)
6851 {
6852 struct smb2_lock_req *req;
6853 struct smb2_lock_rsp *rsp;
6854 struct smb2_lock_element *lock_ele;
6855 struct ksmbd_file *fp = NULL;
6856 struct file_lock *flock = NULL;
6857 struct file *filp = NULL;
6858 int lock_count;
6859 int flags = 0;
6860 int cmd = 0;
6861 int err = -EIO, i, rc = 0;
6862 u64 lock_start, lock_length;
6863 struct ksmbd_lock *smb_lock = NULL, *cmp_lock, *tmp, *tmp2;
6864 struct ksmbd_conn *conn;
6865 int nolock = 0;
6866 LIST_HEAD(lock_list);
6867 LIST_HEAD(rollback_list);
6868 int prior_lock = 0;
6869
6870 WORK_BUFFERS(work, req, rsp);
6871
6872 ksmbd_debug(SMB, "Received lock request\n");
6873 fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
6874 if (!fp) {
6875 ksmbd_debug(SMB, "Invalid file id for lock : %llu\n", req->VolatileFileId);
6876 err = -ENOENT;
6877 goto out2;
6878 }
6879
6880 filp = fp->filp;
6881 lock_count = le16_to_cpu(req->LockCount);
6882 lock_ele = req->locks;
6883
6884 ksmbd_debug(SMB, "lock count is %d\n", lock_count);
6885 if (!lock_count) {
6886 err = -EINVAL;
6887 goto out2;
6888 }
6889
6890 for (i = 0; i < lock_count; i++) {
6891 flags = le32_to_cpu(lock_ele[i].Flags);
6892
6893 flock = smb_flock_init(filp);
6894 if (!flock)
6895 goto out;
6896
6897 cmd = smb2_set_flock_flags(flock, flags);
6898
6899 lock_start = le64_to_cpu(lock_ele[i].Offset);
6900 lock_length = le64_to_cpu(lock_ele[i].Length);
6901 if (lock_start > U64_MAX - lock_length) {
6902 pr_err("Invalid lock range requested\n");
6903 rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE;
6904 locks_free_lock(flock);
6905 goto out;
6906 }
6907
6908 if (lock_start > OFFSET_MAX)
6909 flock->fl_start = OFFSET_MAX;
6910 else
6911 flock->fl_start = lock_start;
6912
6913 lock_length = le64_to_cpu(lock_ele[i].Length);
6914 if (lock_length > OFFSET_MAX - flock->fl_start)
6915 lock_length = OFFSET_MAX - flock->fl_start;
6916
6917 flock->fl_end = flock->fl_start + lock_length;
6918
6919 if (flock->fl_end < flock->fl_start) {
6920 ksmbd_debug(SMB,
6921 "the end offset(%llx) is smaller than the start offset(%llx)\n",
6922 flock->fl_end, flock->fl_start);
6923 rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE;
6924 locks_free_lock(flock);
6925 goto out;
6926 }
6927
6928 /* Check conflict locks in one request */
6929 list_for_each_entry(cmp_lock, &lock_list, llist) {
6930 if (cmp_lock->fl->fl_start <= flock->fl_start &&
6931 cmp_lock->fl->fl_end >= flock->fl_end) {
6932 if (cmp_lock->fl->fl_type != F_UNLCK &&
6933 flock->fl_type != F_UNLCK) {
6934 pr_err("conflict two locks in one request\n");
6935 err = -EINVAL;
6936 locks_free_lock(flock);
6937 goto out;
6938 }
6939 }
6940 }
6941
6942 smb_lock = smb2_lock_init(flock, cmd, flags, &lock_list);
6943 if (!smb_lock) {
6944 err = -EINVAL;
6945 locks_free_lock(flock);
6946 goto out;
6947 }
6948 }
6949
6950 list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) {
6951 if (smb_lock->cmd < 0) {
6952 err = -EINVAL;
6953 goto out;
6954 }
6955
6956 if (!(smb_lock->flags & SMB2_LOCKFLAG_MASK)) {
6957 err = -EINVAL;
6958 goto out;
6959 }
6960
6961 if ((prior_lock & (SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_SHARED) &&
6962 smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) ||
6963 (prior_lock == SMB2_LOCKFLAG_UNLOCK &&
6964 !(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK))) {
6965 err = -EINVAL;
6966 goto out;
6967 }
6968
6969 prior_lock = smb_lock->flags;
6970
6971 if (!(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) &&
6972 !(smb_lock->flags & SMB2_LOCKFLAG_FAIL_IMMEDIATELY))
6973 goto no_check_cl;
6974
6975 nolock = 1;
6976 /* check locks in connection list */
6977 down_read(&conn_list_lock);
6978 list_for_each_entry(conn, &conn_list, conns_list) {
6979 spin_lock(&conn->llist_lock);
6980 list_for_each_entry_safe(cmp_lock, tmp2, &conn->lock_list, clist) {
6981 if (file_inode(cmp_lock->fl->fl_file) !=
6982 file_inode(smb_lock->fl->fl_file))
6983 continue;
6984
6985 if (smb_lock->fl->fl_type == F_UNLCK) {
6986 if (cmp_lock->fl->fl_file == smb_lock->fl->fl_file &&
6987 cmp_lock->start == smb_lock->start &&
6988 cmp_lock->end == smb_lock->end &&
6989 !lock_defer_pending(cmp_lock->fl)) {
6990 nolock = 0;
6991 list_del(&cmp_lock->flist);
6992 list_del(&cmp_lock->clist);
6993 spin_unlock(&conn->llist_lock);
6994 up_read(&conn_list_lock);
6995
6996 locks_free_lock(cmp_lock->fl);
6997 kfree(cmp_lock);
6998 goto out_check_cl;
6999 }
7000 continue;
7001 }
7002
7003 if (cmp_lock->fl->fl_file == smb_lock->fl->fl_file) {
7004 if (smb_lock->flags & SMB2_LOCKFLAG_SHARED)
7005 continue;
7006 } else {
7007 if (cmp_lock->flags & SMB2_LOCKFLAG_SHARED)
7008 continue;
7009 }
7010
7011 /* check zero byte lock range */
7012 if (cmp_lock->zero_len && !smb_lock->zero_len &&
7013 cmp_lock->start > smb_lock->start &&
7014 cmp_lock->start < smb_lock->end) {
7015 spin_unlock(&conn->llist_lock);
7016 up_read(&conn_list_lock);
7017 pr_err("previous lock conflict with zero byte lock range\n");
7018 goto out;
7019 }
7020
7021 if (smb_lock->zero_len && !cmp_lock->zero_len &&
7022 smb_lock->start > cmp_lock->start &&
7023 smb_lock->start < cmp_lock->end) {
7024 spin_unlock(&conn->llist_lock);
7025 up_read(&conn_list_lock);
7026 pr_err("current lock conflict with zero byte lock range\n");
7027 goto out;
7028 }
7029
7030 if (((cmp_lock->start <= smb_lock->start &&
7031 cmp_lock->end > smb_lock->start) ||
7032 (cmp_lock->start < smb_lock->end &&
7033 cmp_lock->end >= smb_lock->end)) &&
7034 !cmp_lock->zero_len && !smb_lock->zero_len) {
7035 spin_unlock(&conn->llist_lock);
7036 up_read(&conn_list_lock);
7037 pr_err("Not allow lock operation on exclusive lock range\n");
7038 goto out;
7039 }
7040 }
7041 spin_unlock(&conn->llist_lock);
7042 }
7043 up_read(&conn_list_lock);
7044 out_check_cl:
7045 if (smb_lock->fl->fl_type == F_UNLCK && nolock) {
7046 pr_err("Try to unlock nolocked range\n");
7047 rsp->hdr.Status = STATUS_RANGE_NOT_LOCKED;
7048 goto out;
7049 }
7050
7051 no_check_cl:
7052 if (smb_lock->zero_len) {
7053 err = 0;
7054 goto skip;
7055 }
7056
7057 flock = smb_lock->fl;
7058 list_del(&smb_lock->llist);
7059 retry:
7060 rc = vfs_lock_file(filp, smb_lock->cmd, flock, NULL);
7061 skip:
7062 if (flags & SMB2_LOCKFLAG_UNLOCK) {
7063 if (!rc) {
7064 ksmbd_debug(SMB, "File unlocked\n");
7065 } else if (rc == -ENOENT) {
7066 rsp->hdr.Status = STATUS_NOT_LOCKED;
7067 goto out;
7068 }
7069 locks_free_lock(flock);
7070 kfree(smb_lock);
7071 } else {
7072 if (rc == FILE_LOCK_DEFERRED) {
7073 void **argv;
7074
7075 ksmbd_debug(SMB,
7076 "would have to wait for getting lock\n");
7077 list_add(&smb_lock->llist, &rollback_list);
7078
7079 argv = kmalloc(sizeof(void *), GFP_KERNEL);
7080 if (!argv) {
7081 err = -ENOMEM;
7082 goto out;
7083 }
7084 argv[0] = flock;
7085
7086 rc = setup_async_work(work,
7087 smb2_remove_blocked_lock,
7088 argv);
7089 if (rc) {
7090 kfree(argv);
7091 err = -ENOMEM;
7092 goto out;
7093 }
7094 spin_lock(&fp->f_lock);
7095 list_add(&work->fp_entry, &fp->blocked_works);
7096 spin_unlock(&fp->f_lock);
7097
7098 smb2_send_interim_resp(work, STATUS_PENDING);
7099
7100 ksmbd_vfs_posix_lock_wait(flock);
7101
7102 spin_lock(&fp->f_lock);
7103 list_del(&work->fp_entry);
7104 spin_unlock(&fp->f_lock);
7105
7106 if (work->state != KSMBD_WORK_ACTIVE) {
7107 list_del(&smb_lock->llist);
7108 locks_free_lock(flock);
7109
7110 if (work->state == KSMBD_WORK_CANCELLED) {
7111 rsp->hdr.Status =
7112 STATUS_CANCELLED;
7113 kfree(smb_lock);
7114 smb2_send_interim_resp(work,
7115 STATUS_CANCELLED);
7116 work->send_no_response = 1;
7117 goto out;
7118 }
7119
7120 rsp->hdr.Status =
7121 STATUS_RANGE_NOT_LOCKED;
7122 kfree(smb_lock);
7123 goto out2;
7124 }
7125
7126 list_del(&smb_lock->llist);
7127 release_async_work(work);
7128 goto retry;
7129 } else if (!rc) {
7130 list_add(&smb_lock->llist, &rollback_list);
7131 spin_lock(&work->conn->llist_lock);
7132 list_add_tail(&smb_lock->clist,
7133 &work->conn->lock_list);
7134 list_add_tail(&smb_lock->flist,
7135 &fp->lock_list);
7136 spin_unlock(&work->conn->llist_lock);
7137 ksmbd_debug(SMB, "successful in taking lock\n");
7138 } else {
7139 goto out;
7140 }
7141 }
7142 }
7143
7144 if (atomic_read(&fp->f_ci->op_count) > 1)
7145 smb_break_all_oplock(work, fp);
7146
7147 rsp->StructureSize = cpu_to_le16(4);
7148 ksmbd_debug(SMB, "successful in taking lock\n");
7149 rsp->hdr.Status = STATUS_SUCCESS;
7150 rsp->Reserved = 0;
7151 err = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_lock_rsp));
7152 if (err)
7153 goto out;
7154
7155 ksmbd_fd_put(work, fp);
7156 return 0;
7157
7158 out:
7159 list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) {
7160 locks_free_lock(smb_lock->fl);
7161 list_del(&smb_lock->llist);
7162 kfree(smb_lock);
7163 }
7164
7165 list_for_each_entry_safe(smb_lock, tmp, &rollback_list, llist) {
7166 struct file_lock *rlock = NULL;
7167
7168 rlock = smb_flock_init(filp);
7169 rlock->fl_type = F_UNLCK;
7170 rlock->fl_start = smb_lock->start;
7171 rlock->fl_end = smb_lock->end;
7172
7173 rc = vfs_lock_file(filp, F_SETLK, rlock, NULL);
7174 if (rc)
7175 pr_err("rollback unlock fail : %d\n", rc);
7176
7177 list_del(&smb_lock->llist);
7178 spin_lock(&work->conn->llist_lock);
7179 if (!list_empty(&smb_lock->flist))
7180 list_del(&smb_lock->flist);
7181 list_del(&smb_lock->clist);
7182 spin_unlock(&work->conn->llist_lock);
7183
7184 locks_free_lock(smb_lock->fl);
7185 locks_free_lock(rlock);
7186 kfree(smb_lock);
7187 }
7188 out2:
7189 ksmbd_debug(SMB, "failed in taking lock(flags : %x), err : %d\n", flags, err);
7190
7191 if (!rsp->hdr.Status) {
7192 if (err == -EINVAL)
7193 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7194 else if (err == -ENOMEM)
7195 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
7196 else if (err == -ENOENT)
7197 rsp->hdr.Status = STATUS_FILE_CLOSED;
7198 else
7199 rsp->hdr.Status = STATUS_LOCK_NOT_GRANTED;
7200 }
7201
7202 smb2_set_err_rsp(work);
7203 ksmbd_fd_put(work, fp);
7204 return err;
7205 }
7206
7207 static int fsctl_copychunk(struct ksmbd_work *work,
7208 struct copychunk_ioctl_req *ci_req,
7209 unsigned int cnt_code,
7210 unsigned int input_count,
7211 unsigned long long volatile_id,
7212 unsigned long long persistent_id,
7213 struct smb2_ioctl_rsp *rsp)
7214 {
7215 struct copychunk_ioctl_rsp *ci_rsp;
7216 struct ksmbd_file *src_fp = NULL, *dst_fp = NULL;
7217 struct srv_copychunk *chunks;
7218 unsigned int i, chunk_count, chunk_count_written = 0;
7219 unsigned int chunk_size_written = 0;
7220 loff_t total_size_written = 0;
7221 int ret = 0;
7222
7223 ci_rsp = (struct copychunk_ioctl_rsp *)&rsp->Buffer[0];
7224
7225 rsp->VolatileFileId = volatile_id;
7226 rsp->PersistentFileId = persistent_id;
7227 ci_rsp->ChunksWritten =
7228 cpu_to_le32(ksmbd_server_side_copy_max_chunk_count());
7229 ci_rsp->ChunkBytesWritten =
7230 cpu_to_le32(ksmbd_server_side_copy_max_chunk_size());
7231 ci_rsp->TotalBytesWritten =
7232 cpu_to_le32(ksmbd_server_side_copy_max_total_size());
7233
7234 chunks = (struct srv_copychunk *)&ci_req->Chunks[0];
7235 chunk_count = le32_to_cpu(ci_req->ChunkCount);
7236 if (chunk_count == 0)
7237 goto out;
7238 total_size_written = 0;
7239
7240 /* verify the SRV_COPYCHUNK_COPY packet */
7241 if (chunk_count > ksmbd_server_side_copy_max_chunk_count() ||
7242 input_count < offsetof(struct copychunk_ioctl_req, Chunks) +
7243 chunk_count * sizeof(struct srv_copychunk)) {
7244 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7245 return -EINVAL;
7246 }
7247
7248 for (i = 0; i < chunk_count; i++) {
7249 if (le32_to_cpu(chunks[i].Length) == 0 ||
7250 le32_to_cpu(chunks[i].Length) > ksmbd_server_side_copy_max_chunk_size())
7251 break;
7252 total_size_written += le32_to_cpu(chunks[i].Length);
7253 }
7254
7255 if (i < chunk_count ||
7256 total_size_written > ksmbd_server_side_copy_max_total_size()) {
7257 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7258 return -EINVAL;
7259 }
7260
7261 src_fp = ksmbd_lookup_foreign_fd(work,
7262 le64_to_cpu(ci_req->ResumeKey[0]));
7263 dst_fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id);
7264 ret = -EINVAL;
7265 if (!src_fp ||
7266 src_fp->persistent_id != le64_to_cpu(ci_req->ResumeKey[1])) {
7267 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
7268 goto out;
7269 }
7270
7271 if (!dst_fp) {
7272 rsp->hdr.Status = STATUS_FILE_CLOSED;
7273 goto out;
7274 }
7275
7276 /*
7277 * FILE_READ_DATA should only be included in
7278 * the FSCTL_COPYCHUNK case
7279 */
7280 if (cnt_code == FSCTL_COPYCHUNK &&
7281 !(dst_fp->daccess & (FILE_READ_DATA_LE | FILE_GENERIC_READ_LE))) {
7282 rsp->hdr.Status = STATUS_ACCESS_DENIED;
7283 goto out;
7284 }
7285
7286 ret = ksmbd_vfs_copy_file_ranges(work, src_fp, dst_fp,
7287 chunks, chunk_count,
7288 &chunk_count_written,
7289 &chunk_size_written,
7290 &total_size_written);
7291 if (ret < 0) {
7292 if (ret == -EACCES)
7293 rsp->hdr.Status = STATUS_ACCESS_DENIED;
7294 if (ret == -EAGAIN)
7295 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
7296 else if (ret == -EBADF)
7297 rsp->hdr.Status = STATUS_INVALID_HANDLE;
7298 else if (ret == -EFBIG || ret == -ENOSPC)
7299 rsp->hdr.Status = STATUS_DISK_FULL;
7300 else if (ret == -EINVAL)
7301 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7302 else if (ret == -EISDIR)
7303 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
7304 else if (ret == -E2BIG)
7305 rsp->hdr.Status = STATUS_INVALID_VIEW_SIZE;
7306 else
7307 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
7308 }
7309
7310 ci_rsp->ChunksWritten = cpu_to_le32(chunk_count_written);
7311 ci_rsp->ChunkBytesWritten = cpu_to_le32(chunk_size_written);
7312 ci_rsp->TotalBytesWritten = cpu_to_le32(total_size_written);
7313 out:
7314 ksmbd_fd_put(work, src_fp);
7315 ksmbd_fd_put(work, dst_fp);
7316 return ret;
7317 }
7318
7319 static __be32 idev_ipv4_address(struct in_device *idev)
7320 {
7321 __be32 addr = 0;
7322
7323 struct in_ifaddr *ifa;
7324
7325 rcu_read_lock();
7326 in_dev_for_each_ifa_rcu(ifa, idev) {
7327 if (ifa->ifa_flags & IFA_F_SECONDARY)
7328 continue;
7329
7330 addr = ifa->ifa_address;
7331 break;
7332 }
7333 rcu_read_unlock();
7334 return addr;
7335 }
7336
7337 static int fsctl_query_iface_info_ioctl(struct ksmbd_conn *conn,
7338 struct smb2_ioctl_rsp *rsp,
7339 unsigned int out_buf_len)
7340 {
7341 struct network_interface_info_ioctl_rsp *nii_rsp = NULL;
7342 int nbytes = 0;
7343 struct net_device *netdev;
7344 struct sockaddr_storage_rsp *sockaddr_storage;
7345 unsigned int flags;
7346 unsigned long long speed;
7347
7348 rtnl_lock();
7349 for_each_netdev(&init_net, netdev) {
7350 bool ipv4_set = false;
7351
7352 if (netdev->type == ARPHRD_LOOPBACK)
7353 continue;
7354
7355 flags = dev_get_flags(netdev);
7356 if (!(flags & IFF_RUNNING))
7357 continue;
7358 ipv6_retry:
7359 if (out_buf_len <
7360 nbytes + sizeof(struct network_interface_info_ioctl_rsp)) {
7361 rtnl_unlock();
7362 return -ENOSPC;
7363 }
7364
7365 nii_rsp = (struct network_interface_info_ioctl_rsp *)
7366 &rsp->Buffer[nbytes];
7367 nii_rsp->IfIndex = cpu_to_le32(netdev->ifindex);
7368
7369 nii_rsp->Capability = 0;
7370 if (netdev->real_num_tx_queues > 1)
7371 nii_rsp->Capability |= cpu_to_le32(RSS_CAPABLE);
7372 if (ksmbd_rdma_capable_netdev(netdev))
7373 nii_rsp->Capability |= cpu_to_le32(RDMA_CAPABLE);
7374
7375 nii_rsp->Next = cpu_to_le32(152);
7376 nii_rsp->Reserved = 0;
7377
7378 if (netdev->ethtool_ops->get_link_ksettings) {
7379 struct ethtool_link_ksettings cmd;
7380
7381 netdev->ethtool_ops->get_link_ksettings(netdev, &cmd);
7382 speed = cmd.base.speed;
7383 } else {
7384 ksmbd_debug(SMB, "%s %s\n", netdev->name,
7385 "speed is unknown, defaulting to 1Gb/sec");
7386 speed = SPEED_1000;
7387 }
7388
7389 speed *= 1000000;
7390 nii_rsp->LinkSpeed = cpu_to_le64(speed);
7391
7392 sockaddr_storage = (struct sockaddr_storage_rsp *)
7393 nii_rsp->SockAddr_Storage;
7394 memset(sockaddr_storage, 0, 128);
7395
7396 if (!ipv4_set) {
7397 struct in_device *idev;
7398
7399 sockaddr_storage->Family = cpu_to_le16(INTERNETWORK);
7400 sockaddr_storage->addr4.Port = 0;
7401
7402 idev = __in_dev_get_rtnl(netdev);
7403 if (!idev)
7404 continue;
7405 sockaddr_storage->addr4.IPv4address =
7406 idev_ipv4_address(idev);
7407 nbytes += sizeof(struct network_interface_info_ioctl_rsp);
7408 ipv4_set = true;
7409 goto ipv6_retry;
7410 } else {
7411 struct inet6_dev *idev6;
7412 struct inet6_ifaddr *ifa;
7413 __u8 *ipv6_addr = sockaddr_storage->addr6.IPv6address;
7414
7415 sockaddr_storage->Family = cpu_to_le16(INTERNETWORKV6);
7416 sockaddr_storage->addr6.Port = 0;
7417 sockaddr_storage->addr6.FlowInfo = 0;
7418
7419 idev6 = __in6_dev_get(netdev);
7420 if (!idev6)
7421 continue;
7422
7423 list_for_each_entry(ifa, &idev6->addr_list, if_list) {
7424 if (ifa->flags & (IFA_F_TENTATIVE |
7425 IFA_F_DEPRECATED))
7426 continue;
7427 memcpy(ipv6_addr, ifa->addr.s6_addr, 16);
7428 break;
7429 }
7430 sockaddr_storage->addr6.ScopeId = 0;
7431 nbytes += sizeof(struct network_interface_info_ioctl_rsp);
7432 }
7433 }
7434 rtnl_unlock();
7435
7436 /* zero if this is last one */
7437 if (nii_rsp)
7438 nii_rsp->Next = 0;
7439
7440 rsp->PersistentFileId = SMB2_NO_FID;
7441 rsp->VolatileFileId = SMB2_NO_FID;
7442 return nbytes;
7443 }
7444
7445 static int fsctl_validate_negotiate_info(struct ksmbd_conn *conn,
7446 struct validate_negotiate_info_req *neg_req,
7447 struct validate_negotiate_info_rsp *neg_rsp,
7448 unsigned int in_buf_len)
7449 {
7450 int ret = 0;
7451 int dialect;
7452
7453 if (in_buf_len < offsetof(struct validate_negotiate_info_req, Dialects) +
7454 le16_to_cpu(neg_req->DialectCount) * sizeof(__le16))
7455 return -EINVAL;
7456
7457 dialect = ksmbd_lookup_dialect_by_id(neg_req->Dialects,
7458 neg_req->DialectCount);
7459 if (dialect == BAD_PROT_ID || dialect != conn->dialect) {
7460 ret = -EINVAL;
7461 goto err_out;
7462 }
7463
7464 if (strncmp(neg_req->Guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE)) {
7465 ret = -EINVAL;
7466 goto err_out;
7467 }
7468
7469 if (le16_to_cpu(neg_req->SecurityMode) != conn->cli_sec_mode) {
7470 ret = -EINVAL;
7471 goto err_out;
7472 }
7473
7474 if (le32_to_cpu(neg_req->Capabilities) != conn->cli_cap) {
7475 ret = -EINVAL;
7476 goto err_out;
7477 }
7478
7479 neg_rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
7480 memset(neg_rsp->Guid, 0, SMB2_CLIENT_GUID_SIZE);
7481 neg_rsp->SecurityMode = cpu_to_le16(conn->srv_sec_mode);
7482 neg_rsp->Dialect = cpu_to_le16(conn->dialect);
7483 err_out:
7484 return ret;
7485 }
7486
7487 static int fsctl_query_allocated_ranges(struct ksmbd_work *work, u64 id,
7488 struct file_allocated_range_buffer *qar_req,
7489 struct file_allocated_range_buffer *qar_rsp,
7490 unsigned int in_count, unsigned int *out_count)
7491 {
7492 struct ksmbd_file *fp;
7493 loff_t start, length;
7494 int ret = 0;
7495
7496 *out_count = 0;
7497 if (in_count == 0)
7498 return -EINVAL;
7499
7500 start = le64_to_cpu(qar_req->file_offset);
7501 length = le64_to_cpu(qar_req->length);
7502
7503 if (start < 0 || length < 0)
7504 return -EINVAL;
7505
7506 fp = ksmbd_lookup_fd_fast(work, id);
7507 if (!fp)
7508 return -ENOENT;
7509
7510 ret = ksmbd_vfs_fqar_lseek(fp, start, length,
7511 qar_rsp, in_count, out_count);
7512 if (ret && ret != -E2BIG)
7513 *out_count = 0;
7514
7515 ksmbd_fd_put(work, fp);
7516 return ret;
7517 }
7518
7519 static int fsctl_pipe_transceive(struct ksmbd_work *work, u64 id,
7520 unsigned int out_buf_len,
7521 struct smb2_ioctl_req *req,
7522 struct smb2_ioctl_rsp *rsp)
7523 {
7524 struct ksmbd_rpc_command *rpc_resp;
7525 char *data_buf = (char *)&req->Buffer[0];
7526 int nbytes = 0;
7527
7528 rpc_resp = ksmbd_rpc_ioctl(work->sess, id, data_buf,
7529 le32_to_cpu(req->InputCount));
7530 if (rpc_resp) {
7531 if (rpc_resp->flags == KSMBD_RPC_SOME_NOT_MAPPED) {
7532 /*
7533 * set STATUS_SOME_NOT_MAPPED response
7534 * for unknown domain sid.
7535 */
7536 rsp->hdr.Status = STATUS_SOME_NOT_MAPPED;
7537 } else if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) {
7538 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
7539 goto out;
7540 } else if (rpc_resp->flags != KSMBD_RPC_OK) {
7541 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7542 goto out;
7543 }
7544
7545 nbytes = rpc_resp->payload_sz;
7546 if (rpc_resp->payload_sz > out_buf_len) {
7547 rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
7548 nbytes = out_buf_len;
7549 }
7550
7551 if (!rpc_resp->payload_sz) {
7552 rsp->hdr.Status =
7553 STATUS_UNEXPECTED_IO_ERROR;
7554 goto out;
7555 }
7556
7557 memcpy((char *)rsp->Buffer, rpc_resp->payload, nbytes);
7558 }
7559 out:
7560 kvfree(rpc_resp);
7561 return nbytes;
7562 }
7563
7564 static inline int fsctl_set_sparse(struct ksmbd_work *work, u64 id,
7565 struct file_sparse *sparse)
7566 {
7567 struct ksmbd_file *fp;
7568 struct mnt_idmap *idmap;
7569 int ret = 0;
7570 __le32 old_fattr;
7571
7572 fp = ksmbd_lookup_fd_fast(work, id);
7573 if (!fp)
7574 return -ENOENT;
7575 idmap = file_mnt_idmap(fp->filp);
7576
7577 old_fattr = fp->f_ci->m_fattr;
7578 if (sparse->SetSparse)
7579 fp->f_ci->m_fattr |= FILE_ATTRIBUTE_SPARSE_FILE_LE;
7580 else
7581 fp->f_ci->m_fattr &= ~FILE_ATTRIBUTE_SPARSE_FILE_LE;
7582
7583 if (fp->f_ci->m_fattr != old_fattr &&
7584 test_share_config_flag(work->tcon->share_conf,
7585 KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) {
7586 struct xattr_dos_attrib da;
7587
7588 ret = ksmbd_vfs_get_dos_attrib_xattr(idmap,
7589 fp->filp->f_path.dentry, &da);
7590 if (ret <= 0)
7591 goto out;
7592
7593 da.attr = le32_to_cpu(fp->f_ci->m_fattr);
7594 ret = ksmbd_vfs_set_dos_attrib_xattr(idmap,
7595 &fp->filp->f_path,
7596 &da, true);
7597 if (ret)
7598 fp->f_ci->m_fattr = old_fattr;
7599 }
7600
7601 out:
7602 ksmbd_fd_put(work, fp);
7603 return ret;
7604 }
7605
7606 static int fsctl_request_resume_key(struct ksmbd_work *work,
7607 struct smb2_ioctl_req *req,
7608 struct resume_key_ioctl_rsp *key_rsp)
7609 {
7610 struct ksmbd_file *fp;
7611
7612 fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
7613 if (!fp)
7614 return -ENOENT;
7615
7616 memset(key_rsp, 0, sizeof(*key_rsp));
7617 key_rsp->ResumeKey[0] = req->VolatileFileId;
7618 key_rsp->ResumeKey[1] = req->PersistentFileId;
7619 ksmbd_fd_put(work, fp);
7620
7621 return 0;
7622 }
7623
7624 /**
7625 * smb2_ioctl() - handler for smb2 ioctl command
7626 * @work: smb work containing ioctl command buffer
7627 *
7628 * Return: 0 on success, otherwise error
7629 */
7630 int smb2_ioctl(struct ksmbd_work *work)
7631 {
7632 struct smb2_ioctl_req *req;
7633 struct smb2_ioctl_rsp *rsp;
7634 unsigned int cnt_code, nbytes = 0, out_buf_len, in_buf_len;
7635 u64 id = KSMBD_NO_FID;
7636 struct ksmbd_conn *conn = work->conn;
7637 int ret = 0;
7638
7639 if (work->next_smb2_rcv_hdr_off) {
7640 req = ksmbd_req_buf_next(work);
7641 rsp = ksmbd_resp_buf_next(work);
7642 if (!has_file_id(req->VolatileFileId)) {
7643 ksmbd_debug(SMB, "Compound request set FID = %llu\n",
7644 work->compound_fid);
7645 id = work->compound_fid;
7646 }
7647 } else {
7648 req = smb2_get_msg(work->request_buf);
7649 rsp = smb2_get_msg(work->response_buf);
7650 }
7651
7652 if (!has_file_id(id))
7653 id = req->VolatileFileId;
7654
7655 if (req->Flags != cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL)) {
7656 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
7657 goto out;
7658 }
7659
7660 cnt_code = le32_to_cpu(req->CtlCode);
7661 ret = smb2_calc_max_out_buf_len(work, 48,
7662 le32_to_cpu(req->MaxOutputResponse));
7663 if (ret < 0) {
7664 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7665 goto out;
7666 }
7667 out_buf_len = (unsigned int)ret;
7668 in_buf_len = le32_to_cpu(req->InputCount);
7669
7670 switch (cnt_code) {
7671 case FSCTL_DFS_GET_REFERRALS:
7672 case FSCTL_DFS_GET_REFERRALS_EX:
7673 /* Not support DFS yet */
7674 rsp->hdr.Status = STATUS_FS_DRIVER_REQUIRED;
7675 goto out;
7676 case FSCTL_CREATE_OR_GET_OBJECT_ID:
7677 {
7678 struct file_object_buf_type1_ioctl_rsp *obj_buf;
7679
7680 nbytes = sizeof(struct file_object_buf_type1_ioctl_rsp);
7681 obj_buf = (struct file_object_buf_type1_ioctl_rsp *)
7682 &rsp->Buffer[0];
7683
7684 /*
7685 * TODO: This is dummy implementation to pass smbtorture
7686 * Need to check correct response later
7687 */
7688 memset(obj_buf->ObjectId, 0x0, 16);
7689 memset(obj_buf->BirthVolumeId, 0x0, 16);
7690 memset(obj_buf->BirthObjectId, 0x0, 16);
7691 memset(obj_buf->DomainId, 0x0, 16);
7692
7693 break;
7694 }
7695 case FSCTL_PIPE_TRANSCEIVE:
7696 out_buf_len = min_t(u32, KSMBD_IPC_MAX_PAYLOAD, out_buf_len);
7697 nbytes = fsctl_pipe_transceive(work, id, out_buf_len, req, rsp);
7698 break;
7699 case FSCTL_VALIDATE_NEGOTIATE_INFO:
7700 if (conn->dialect < SMB30_PROT_ID) {
7701 ret = -EOPNOTSUPP;
7702 goto out;
7703 }
7704
7705 if (in_buf_len < offsetof(struct validate_negotiate_info_req,
7706 Dialects)) {
7707 ret = -EINVAL;
7708 goto out;
7709 }
7710
7711 if (out_buf_len < sizeof(struct validate_negotiate_info_rsp)) {
7712 ret = -EINVAL;
7713 goto out;
7714 }
7715
7716 ret = fsctl_validate_negotiate_info(conn,
7717 (struct validate_negotiate_info_req *)&req->Buffer[0],
7718 (struct validate_negotiate_info_rsp *)&rsp->Buffer[0],
7719 in_buf_len);
7720 if (ret < 0)
7721 goto out;
7722
7723 nbytes = sizeof(struct validate_negotiate_info_rsp);
7724 rsp->PersistentFileId = SMB2_NO_FID;
7725 rsp->VolatileFileId = SMB2_NO_FID;
7726 break;
7727 case FSCTL_QUERY_NETWORK_INTERFACE_INFO:
7728 ret = fsctl_query_iface_info_ioctl(conn, rsp, out_buf_len);
7729 if (ret < 0)
7730 goto out;
7731 nbytes = ret;
7732 break;
7733 case FSCTL_REQUEST_RESUME_KEY:
7734 if (out_buf_len < sizeof(struct resume_key_ioctl_rsp)) {
7735 ret = -EINVAL;
7736 goto out;
7737 }
7738
7739 ret = fsctl_request_resume_key(work, req,
7740 (struct resume_key_ioctl_rsp *)&rsp->Buffer[0]);
7741 if (ret < 0)
7742 goto out;
7743 rsp->PersistentFileId = req->PersistentFileId;
7744 rsp->VolatileFileId = req->VolatileFileId;
7745 nbytes = sizeof(struct resume_key_ioctl_rsp);
7746 break;
7747 case FSCTL_COPYCHUNK:
7748 case FSCTL_COPYCHUNK_WRITE:
7749 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
7750 ksmbd_debug(SMB,
7751 "User does not have write permission\n");
7752 ret = -EACCES;
7753 goto out;
7754 }
7755
7756 if (in_buf_len < sizeof(struct copychunk_ioctl_req)) {
7757 ret = -EINVAL;
7758 goto out;
7759 }
7760
7761 if (out_buf_len < sizeof(struct copychunk_ioctl_rsp)) {
7762 ret = -EINVAL;
7763 goto out;
7764 }
7765
7766 nbytes = sizeof(struct copychunk_ioctl_rsp);
7767 rsp->VolatileFileId = req->VolatileFileId;
7768 rsp->PersistentFileId = req->PersistentFileId;
7769 fsctl_copychunk(work,
7770 (struct copychunk_ioctl_req *)&req->Buffer[0],
7771 le32_to_cpu(req->CtlCode),
7772 le32_to_cpu(req->InputCount),
7773 req->VolatileFileId,
7774 req->PersistentFileId,
7775 rsp);
7776 break;
7777 case FSCTL_SET_SPARSE:
7778 if (in_buf_len < sizeof(struct file_sparse)) {
7779 ret = -EINVAL;
7780 goto out;
7781 }
7782
7783 ret = fsctl_set_sparse(work, id,
7784 (struct file_sparse *)&req->Buffer[0]);
7785 if (ret < 0)
7786 goto out;
7787 break;
7788 case FSCTL_SET_ZERO_DATA:
7789 {
7790 struct file_zero_data_information *zero_data;
7791 struct ksmbd_file *fp;
7792 loff_t off, len, bfz;
7793
7794 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
7795 ksmbd_debug(SMB,
7796 "User does not have write permission\n");
7797 ret = -EACCES;
7798 goto out;
7799 }
7800
7801 if (in_buf_len < sizeof(struct file_zero_data_information)) {
7802 ret = -EINVAL;
7803 goto out;
7804 }
7805
7806 zero_data =
7807 (struct file_zero_data_information *)&req->Buffer[0];
7808
7809 off = le64_to_cpu(zero_data->FileOffset);
7810 bfz = le64_to_cpu(zero_data->BeyondFinalZero);
7811 if (off < 0 || bfz < 0 || off > bfz) {
7812 ret = -EINVAL;
7813 goto out;
7814 }
7815
7816 len = bfz - off;
7817 if (len) {
7818 fp = ksmbd_lookup_fd_fast(work, id);
7819 if (!fp) {
7820 ret = -ENOENT;
7821 goto out;
7822 }
7823
7824 ret = ksmbd_vfs_zero_data(work, fp, off, len);
7825 ksmbd_fd_put(work, fp);
7826 if (ret < 0)
7827 goto out;
7828 }
7829 break;
7830 }
7831 case FSCTL_QUERY_ALLOCATED_RANGES:
7832 if (in_buf_len < sizeof(struct file_allocated_range_buffer)) {
7833 ret = -EINVAL;
7834 goto out;
7835 }
7836
7837 ret = fsctl_query_allocated_ranges(work, id,
7838 (struct file_allocated_range_buffer *)&req->Buffer[0],
7839 (struct file_allocated_range_buffer *)&rsp->Buffer[0],
7840 out_buf_len /
7841 sizeof(struct file_allocated_range_buffer), &nbytes);
7842 if (ret == -E2BIG) {
7843 rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
7844 } else if (ret < 0) {
7845 nbytes = 0;
7846 goto out;
7847 }
7848
7849 nbytes *= sizeof(struct file_allocated_range_buffer);
7850 break;
7851 case FSCTL_GET_REPARSE_POINT:
7852 {
7853 struct reparse_data_buffer *reparse_ptr;
7854 struct ksmbd_file *fp;
7855
7856 reparse_ptr = (struct reparse_data_buffer *)&rsp->Buffer[0];
7857 fp = ksmbd_lookup_fd_fast(work, id);
7858 if (!fp) {
7859 pr_err("not found fp!!\n");
7860 ret = -ENOENT;
7861 goto out;
7862 }
7863
7864 reparse_ptr->ReparseTag =
7865 smb2_get_reparse_tag_special_file(file_inode(fp->filp)->i_mode);
7866 reparse_ptr->ReparseDataLength = 0;
7867 ksmbd_fd_put(work, fp);
7868 nbytes = sizeof(struct reparse_data_buffer);
7869 break;
7870 }
7871 case FSCTL_DUPLICATE_EXTENTS_TO_FILE:
7872 {
7873 struct ksmbd_file *fp_in, *fp_out = NULL;
7874 struct duplicate_extents_to_file *dup_ext;
7875 loff_t src_off, dst_off, length, cloned;
7876
7877 if (in_buf_len < sizeof(struct duplicate_extents_to_file)) {
7878 ret = -EINVAL;
7879 goto out;
7880 }
7881
7882 dup_ext = (struct duplicate_extents_to_file *)&req->Buffer[0];
7883
7884 fp_in = ksmbd_lookup_fd_slow(work, dup_ext->VolatileFileHandle,
7885 dup_ext->PersistentFileHandle);
7886 if (!fp_in) {
7887 pr_err("not found file handle in duplicate extent to file\n");
7888 ret = -ENOENT;
7889 goto out;
7890 }
7891
7892 fp_out = ksmbd_lookup_fd_fast(work, id);
7893 if (!fp_out) {
7894 pr_err("not found fp\n");
7895 ret = -ENOENT;
7896 goto dup_ext_out;
7897 }
7898
7899 src_off = le64_to_cpu(dup_ext->SourceFileOffset);
7900 dst_off = le64_to_cpu(dup_ext->TargetFileOffset);
7901 length = le64_to_cpu(dup_ext->ByteCount);
7902 /*
7903 * XXX: It is not clear if FSCTL_DUPLICATE_EXTENTS_TO_FILE
7904 * should fall back to vfs_copy_file_range(). This could be
7905 * beneficial when re-exporting nfs/smb mount, but note that
7906 * this can result in partial copy that returns an error status.
7907 * If/when FSCTL_DUPLICATE_EXTENTS_TO_FILE_EX is implemented,
7908 * fall back to vfs_copy_file_range(), should be avoided when
7909 * the flag DUPLICATE_EXTENTS_DATA_EX_SOURCE_ATOMIC is set.
7910 */
7911 cloned = vfs_clone_file_range(fp_in->filp, src_off,
7912 fp_out->filp, dst_off, length, 0);
7913 if (cloned == -EXDEV || cloned == -EOPNOTSUPP) {
7914 ret = -EOPNOTSUPP;
7915 goto dup_ext_out;
7916 } else if (cloned != length) {
7917 cloned = vfs_copy_file_range(fp_in->filp, src_off,
7918 fp_out->filp, dst_off,
7919 length, 0);
7920 if (cloned != length) {
7921 if (cloned < 0)
7922 ret = cloned;
7923 else
7924 ret = -EINVAL;
7925 }
7926 }
7927
7928 dup_ext_out:
7929 ksmbd_fd_put(work, fp_in);
7930 ksmbd_fd_put(work, fp_out);
7931 if (ret < 0)
7932 goto out;
7933 break;
7934 }
7935 default:
7936 ksmbd_debug(SMB, "not implemented yet ioctl command 0x%x\n",
7937 cnt_code);
7938 ret = -EOPNOTSUPP;
7939 goto out;
7940 }
7941
7942 rsp->CtlCode = cpu_to_le32(cnt_code);
7943 rsp->InputCount = cpu_to_le32(0);
7944 rsp->InputOffset = cpu_to_le32(112);
7945 rsp->OutputOffset = cpu_to_le32(112);
7946 rsp->OutputCount = cpu_to_le32(nbytes);
7947 rsp->StructureSize = cpu_to_le16(49);
7948 rsp->Reserved = cpu_to_le16(0);
7949 rsp->Flags = cpu_to_le32(0);
7950 rsp->Reserved2 = cpu_to_le32(0);
7951 ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_ioctl_rsp) + nbytes);
7952 if (!ret)
7953 return ret;
7954
7955 out:
7956 if (ret == -EACCES)
7957 rsp->hdr.Status = STATUS_ACCESS_DENIED;
7958 else if (ret == -ENOENT)
7959 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
7960 else if (ret == -EOPNOTSUPP)
7961 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
7962 else if (ret == -ENOSPC)
7963 rsp->hdr.Status = STATUS_BUFFER_TOO_SMALL;
7964 else if (ret < 0 || rsp->hdr.Status == 0)
7965 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7966 smb2_set_err_rsp(work);
7967 return 0;
7968 }
7969
7970 /**
7971 * smb20_oplock_break_ack() - handler for smb2.0 oplock break command
7972 * @work: smb work containing oplock break command buffer
7973 *
7974 * Return: 0
7975 */
7976 static void smb20_oplock_break_ack(struct ksmbd_work *work)
7977 {
7978 struct smb2_oplock_break *req;
7979 struct smb2_oplock_break *rsp;
7980 struct ksmbd_file *fp;
7981 struct oplock_info *opinfo = NULL;
7982 __le32 err = 0;
7983 int ret = 0;
7984 u64 volatile_id, persistent_id;
7985 char req_oplevel = 0, rsp_oplevel = 0;
7986 unsigned int oplock_change_type;
7987
7988 WORK_BUFFERS(work, req, rsp);
7989
7990 volatile_id = req->VolatileFid;
7991 persistent_id = req->PersistentFid;
7992 req_oplevel = req->OplockLevel;
7993 ksmbd_debug(OPLOCK, "v_id %llu, p_id %llu request oplock level %d\n",
7994 volatile_id, persistent_id, req_oplevel);
7995
7996 fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id);
7997 if (!fp) {
7998 rsp->hdr.Status = STATUS_FILE_CLOSED;
7999 smb2_set_err_rsp(work);
8000 return;
8001 }
8002
8003 opinfo = opinfo_get(fp);
8004 if (!opinfo) {
8005 pr_err("unexpected null oplock_info\n");
8006 rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL;
8007 smb2_set_err_rsp(work);
8008 ksmbd_fd_put(work, fp);
8009 return;
8010 }
8011
8012 if (opinfo->level == SMB2_OPLOCK_LEVEL_NONE) {
8013 rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL;
8014 goto err_out;
8015 }
8016
8017 if (opinfo->op_state == OPLOCK_STATE_NONE) {
8018 ksmbd_debug(SMB, "unexpected oplock state 0x%x\n", opinfo->op_state);
8019 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8020 goto err_out;
8021 }
8022
8023 if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
8024 opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
8025 (req_oplevel != SMB2_OPLOCK_LEVEL_II &&
8026 req_oplevel != SMB2_OPLOCK_LEVEL_NONE)) {
8027 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8028 oplock_change_type = OPLOCK_WRITE_TO_NONE;
8029 } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II &&
8030 req_oplevel != SMB2_OPLOCK_LEVEL_NONE) {
8031 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8032 oplock_change_type = OPLOCK_READ_TO_NONE;
8033 } else if (req_oplevel == SMB2_OPLOCK_LEVEL_II ||
8034 req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
8035 err = STATUS_INVALID_DEVICE_STATE;
8036 if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
8037 opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
8038 req_oplevel == SMB2_OPLOCK_LEVEL_II) {
8039 oplock_change_type = OPLOCK_WRITE_TO_READ;
8040 } else if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
8041 opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
8042 req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
8043 oplock_change_type = OPLOCK_WRITE_TO_NONE;
8044 } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II &&
8045 req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
8046 oplock_change_type = OPLOCK_READ_TO_NONE;
8047 } else {
8048 oplock_change_type = 0;
8049 }
8050 } else {
8051 oplock_change_type = 0;
8052 }
8053
8054 switch (oplock_change_type) {
8055 case OPLOCK_WRITE_TO_READ:
8056 ret = opinfo_write_to_read(opinfo);
8057 rsp_oplevel = SMB2_OPLOCK_LEVEL_II;
8058 break;
8059 case OPLOCK_WRITE_TO_NONE:
8060 ret = opinfo_write_to_none(opinfo);
8061 rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE;
8062 break;
8063 case OPLOCK_READ_TO_NONE:
8064 ret = opinfo_read_to_none(opinfo);
8065 rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE;
8066 break;
8067 default:
8068 pr_err("unknown oplock change 0x%x -> 0x%x\n",
8069 opinfo->level, rsp_oplevel);
8070 }
8071
8072 if (ret < 0) {
8073 rsp->hdr.Status = err;
8074 goto err_out;
8075 }
8076
8077 opinfo->op_state = OPLOCK_STATE_NONE;
8078 wake_up_interruptible_all(&opinfo->oplock_q);
8079 opinfo_put(opinfo);
8080 ksmbd_fd_put(work, fp);
8081
8082 rsp->StructureSize = cpu_to_le16(24);
8083 rsp->OplockLevel = rsp_oplevel;
8084 rsp->Reserved = 0;
8085 rsp->Reserved2 = 0;
8086 rsp->VolatileFid = volatile_id;
8087 rsp->PersistentFid = persistent_id;
8088 ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_oplock_break));
8089 if (!ret)
8090 return;
8091
8092 err_out:
8093 opinfo->op_state = OPLOCK_STATE_NONE;
8094 wake_up_interruptible_all(&opinfo->oplock_q);
8095
8096 opinfo_put(opinfo);
8097 ksmbd_fd_put(work, fp);
8098 smb2_set_err_rsp(work);
8099 }
8100
8101 static int check_lease_state(struct lease *lease, __le32 req_state)
8102 {
8103 if ((lease->new_state ==
8104 (SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE)) &&
8105 !(req_state & SMB2_LEASE_WRITE_CACHING_LE)) {
8106 lease->new_state = req_state;
8107 return 0;
8108 }
8109
8110 if (lease->new_state == req_state)
8111 return 0;
8112
8113 return 1;
8114 }
8115
8116 /**
8117 * smb21_lease_break_ack() - handler for smb2.1 lease break command
8118 * @work: smb work containing lease break command buffer
8119 *
8120 * Return: 0
8121 */
8122 static void smb21_lease_break_ack(struct ksmbd_work *work)
8123 {
8124 struct ksmbd_conn *conn = work->conn;
8125 struct smb2_lease_ack *req;
8126 struct smb2_lease_ack *rsp;
8127 struct oplock_info *opinfo;
8128 __le32 err = 0;
8129 int ret = 0;
8130 unsigned int lease_change_type;
8131 __le32 lease_state;
8132 struct lease *lease;
8133
8134 WORK_BUFFERS(work, req, rsp);
8135
8136 ksmbd_debug(OPLOCK, "smb21 lease break, lease state(0x%x)\n",
8137 le32_to_cpu(req->LeaseState));
8138 opinfo = lookup_lease_in_table(conn, req->LeaseKey);
8139 if (!opinfo) {
8140 ksmbd_debug(OPLOCK, "file not opened\n");
8141 smb2_set_err_rsp(work);
8142 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8143 return;
8144 }
8145 lease = opinfo->o_lease;
8146
8147 if (opinfo->op_state == OPLOCK_STATE_NONE) {
8148 pr_err("unexpected lease break state 0x%x\n",
8149 opinfo->op_state);
8150 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8151 goto err_out;
8152 }
8153
8154 if (check_lease_state(lease, req->LeaseState)) {
8155 rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED;
8156 ksmbd_debug(OPLOCK,
8157 "req lease state: 0x%x, expected state: 0x%x\n",
8158 req->LeaseState, lease->new_state);
8159 goto err_out;
8160 }
8161
8162 if (!atomic_read(&opinfo->breaking_cnt)) {
8163 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8164 goto err_out;
8165 }
8166
8167 /* check for bad lease state */
8168 if (req->LeaseState &
8169 (~(SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE))) {
8170 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8171 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8172 lease_change_type = OPLOCK_WRITE_TO_NONE;
8173 else
8174 lease_change_type = OPLOCK_READ_TO_NONE;
8175 ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n",
8176 le32_to_cpu(lease->state),
8177 le32_to_cpu(req->LeaseState));
8178 } else if (lease->state == SMB2_LEASE_READ_CACHING_LE &&
8179 req->LeaseState != SMB2_LEASE_NONE_LE) {
8180 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8181 lease_change_type = OPLOCK_READ_TO_NONE;
8182 ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n",
8183 le32_to_cpu(lease->state),
8184 le32_to_cpu(req->LeaseState));
8185 } else {
8186 /* valid lease state changes */
8187 err = STATUS_INVALID_DEVICE_STATE;
8188 if (req->LeaseState == SMB2_LEASE_NONE_LE) {
8189 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8190 lease_change_type = OPLOCK_WRITE_TO_NONE;
8191 else
8192 lease_change_type = OPLOCK_READ_TO_NONE;
8193 } else if (req->LeaseState & SMB2_LEASE_READ_CACHING_LE) {
8194 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8195 lease_change_type = OPLOCK_WRITE_TO_READ;
8196 else
8197 lease_change_type = OPLOCK_READ_HANDLE_TO_READ;
8198 } else {
8199 lease_change_type = 0;
8200 }
8201 }
8202
8203 switch (lease_change_type) {
8204 case OPLOCK_WRITE_TO_READ:
8205 ret = opinfo_write_to_read(opinfo);
8206 break;
8207 case OPLOCK_READ_HANDLE_TO_READ:
8208 ret = opinfo_read_handle_to_read(opinfo);
8209 break;
8210 case OPLOCK_WRITE_TO_NONE:
8211 ret = opinfo_write_to_none(opinfo);
8212 break;
8213 case OPLOCK_READ_TO_NONE:
8214 ret = opinfo_read_to_none(opinfo);
8215 break;
8216 default:
8217 ksmbd_debug(OPLOCK, "unknown lease change 0x%x -> 0x%x\n",
8218 le32_to_cpu(lease->state),
8219 le32_to_cpu(req->LeaseState));
8220 }
8221
8222 if (ret < 0) {
8223 rsp->hdr.Status = err;
8224 goto err_out;
8225 }
8226
8227 lease_state = lease->state;
8228 opinfo->op_state = OPLOCK_STATE_NONE;
8229 wake_up_interruptible_all(&opinfo->oplock_q);
8230 atomic_dec(&opinfo->breaking_cnt);
8231 wake_up_interruptible_all(&opinfo->oplock_brk);
8232 opinfo_put(opinfo);
8233
8234 rsp->StructureSize = cpu_to_le16(36);
8235 rsp->Reserved = 0;
8236 rsp->Flags = 0;
8237 memcpy(rsp->LeaseKey, req->LeaseKey, 16);
8238 rsp->LeaseState = lease_state;
8239 rsp->LeaseDuration = 0;
8240 ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_lease_ack));
8241 if (!ret)
8242 return;
8243
8244 err_out:
8245 wake_up_interruptible_all(&opinfo->oplock_q);
8246 atomic_dec(&opinfo->breaking_cnt);
8247 wake_up_interruptible_all(&opinfo->oplock_brk);
8248
8249 opinfo_put(opinfo);
8250 smb2_set_err_rsp(work);
8251 }
8252
8253 /**
8254 * smb2_oplock_break() - dispatcher for smb2.0 and 2.1 oplock/lease break
8255 * @work: smb work containing oplock/lease break command buffer
8256 *
8257 * Return: 0
8258 */
8259 int smb2_oplock_break(struct ksmbd_work *work)
8260 {
8261 struct smb2_oplock_break *req;
8262 struct smb2_oplock_break *rsp;
8263
8264 WORK_BUFFERS(work, req, rsp);
8265
8266 switch (le16_to_cpu(req->StructureSize)) {
8267 case OP_BREAK_STRUCT_SIZE_20:
8268 smb20_oplock_break_ack(work);
8269 break;
8270 case OP_BREAK_STRUCT_SIZE_21:
8271 smb21_lease_break_ack(work);
8272 break;
8273 default:
8274 ksmbd_debug(OPLOCK, "invalid break cmd %d\n",
8275 le16_to_cpu(req->StructureSize));
8276 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
8277 smb2_set_err_rsp(work);
8278 }
8279
8280 return 0;
8281 }
8282
8283 /**
8284 * smb2_notify() - handler for smb2 notify request
8285 * @work: smb work containing notify command buffer
8286 *
8287 * Return: 0
8288 */
8289 int smb2_notify(struct ksmbd_work *work)
8290 {
8291 struct smb2_change_notify_req *req;
8292 struct smb2_change_notify_rsp *rsp;
8293
8294 WORK_BUFFERS(work, req, rsp);
8295
8296 if (work->next_smb2_rcv_hdr_off && req->hdr.NextCommand) {
8297 rsp->hdr.Status = STATUS_INTERNAL_ERROR;
8298 smb2_set_err_rsp(work);
8299 return 0;
8300 }
8301
8302 smb2_set_err_rsp(work);
8303 rsp->hdr.Status = STATUS_NOT_IMPLEMENTED;
8304 return 0;
8305 }
8306
8307 /**
8308 * smb2_is_sign_req() - handler for checking packet signing status
8309 * @work: smb work containing notify command buffer
8310 * @command: SMB2 command id
8311 *
8312 * Return: true if packed is signed, false otherwise
8313 */
8314 bool smb2_is_sign_req(struct ksmbd_work *work, unsigned int command)
8315 {
8316 struct smb2_hdr *rcv_hdr2 = smb2_get_msg(work->request_buf);
8317
8318 if ((rcv_hdr2->Flags & SMB2_FLAGS_SIGNED) &&
8319 command != SMB2_NEGOTIATE_HE &&
8320 command != SMB2_SESSION_SETUP_HE &&
8321 command != SMB2_OPLOCK_BREAK_HE)
8322 return true;
8323
8324 return false;
8325 }
8326
8327 /**
8328 * smb2_check_sign_req() - handler for req packet sign processing
8329 * @work: smb work containing notify command buffer
8330 *
8331 * Return: 1 on success, 0 otherwise
8332 */
8333 int smb2_check_sign_req(struct ksmbd_work *work)
8334 {
8335 struct smb2_hdr *hdr;
8336 char signature_req[SMB2_SIGNATURE_SIZE];
8337 char signature[SMB2_HMACSHA256_SIZE];
8338 struct kvec iov[1];
8339 size_t len;
8340
8341 hdr = smb2_get_msg(work->request_buf);
8342 if (work->next_smb2_rcv_hdr_off)
8343 hdr = ksmbd_req_buf_next(work);
8344
8345 if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off)
8346 len = get_rfc1002_len(work->request_buf);
8347 else if (hdr->NextCommand)
8348 len = le32_to_cpu(hdr->NextCommand);
8349 else
8350 len = get_rfc1002_len(work->request_buf) -
8351 work->next_smb2_rcv_hdr_off;
8352
8353 memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE);
8354 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8355
8356 iov[0].iov_base = (char *)&hdr->ProtocolId;
8357 iov[0].iov_len = len;
8358
8359 if (ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, 1,
8360 signature))
8361 return 0;
8362
8363 if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) {
8364 pr_err("bad smb2 signature\n");
8365 return 0;
8366 }
8367
8368 return 1;
8369 }
8370
8371 /**
8372 * smb2_set_sign_rsp() - handler for rsp packet sign processing
8373 * @work: smb work containing notify command buffer
8374 *
8375 */
8376 void smb2_set_sign_rsp(struct ksmbd_work *work)
8377 {
8378 struct smb2_hdr *hdr;
8379 char signature[SMB2_HMACSHA256_SIZE];
8380 struct kvec *iov;
8381 int n_vec = 1;
8382
8383 hdr = ksmbd_resp_buf_curr(work);
8384 hdr->Flags |= SMB2_FLAGS_SIGNED;
8385 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8386
8387 if (hdr->Command == SMB2_READ) {
8388 iov = &work->iov[work->iov_idx - 1];
8389 n_vec++;
8390 } else {
8391 iov = &work->iov[work->iov_idx];
8392 }
8393
8394 if (!ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, n_vec,
8395 signature))
8396 memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE);
8397 }
8398
8399 /**
8400 * smb3_check_sign_req() - handler for req packet sign processing
8401 * @work: smb work containing notify command buffer
8402 *
8403 * Return: 1 on success, 0 otherwise
8404 */
8405 int smb3_check_sign_req(struct ksmbd_work *work)
8406 {
8407 struct ksmbd_conn *conn = work->conn;
8408 char *signing_key;
8409 struct smb2_hdr *hdr;
8410 struct channel *chann;
8411 char signature_req[SMB2_SIGNATURE_SIZE];
8412 char signature[SMB2_CMACAES_SIZE];
8413 struct kvec iov[1];
8414 size_t len;
8415
8416 hdr = smb2_get_msg(work->request_buf);
8417 if (work->next_smb2_rcv_hdr_off)
8418 hdr = ksmbd_req_buf_next(work);
8419
8420 if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off)
8421 len = get_rfc1002_len(work->request_buf);
8422 else if (hdr->NextCommand)
8423 len = le32_to_cpu(hdr->NextCommand);
8424 else
8425 len = get_rfc1002_len(work->request_buf) -
8426 work->next_smb2_rcv_hdr_off;
8427
8428 if (le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) {
8429 signing_key = work->sess->smb3signingkey;
8430 } else {
8431 chann = lookup_chann_list(work->sess, conn);
8432 if (!chann) {
8433 return 0;
8434 }
8435 signing_key = chann->smb3signingkey;
8436 }
8437
8438 if (!signing_key) {
8439 pr_err("SMB3 signing key is not generated\n");
8440 return 0;
8441 }
8442
8443 memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE);
8444 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8445 iov[0].iov_base = (char *)&hdr->ProtocolId;
8446 iov[0].iov_len = len;
8447
8448 if (ksmbd_sign_smb3_pdu(conn, signing_key, iov, 1, signature))
8449 return 0;
8450
8451 if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) {
8452 pr_err("bad smb2 signature\n");
8453 return 0;
8454 }
8455
8456 return 1;
8457 }
8458
8459 /**
8460 * smb3_set_sign_rsp() - handler for rsp packet sign processing
8461 * @work: smb work containing notify command buffer
8462 *
8463 */
8464 void smb3_set_sign_rsp(struct ksmbd_work *work)
8465 {
8466 struct ksmbd_conn *conn = work->conn;
8467 struct smb2_hdr *hdr;
8468 struct channel *chann;
8469 char signature[SMB2_CMACAES_SIZE];
8470 struct kvec *iov;
8471 int n_vec = 1;
8472 char *signing_key;
8473
8474 hdr = ksmbd_resp_buf_curr(work);
8475
8476 if (conn->binding == false &&
8477 le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) {
8478 signing_key = work->sess->smb3signingkey;
8479 } else {
8480 chann = lookup_chann_list(work->sess, work->conn);
8481 if (!chann) {
8482 return;
8483 }
8484 signing_key = chann->smb3signingkey;
8485 }
8486
8487 if (!signing_key)
8488 return;
8489
8490 hdr->Flags |= SMB2_FLAGS_SIGNED;
8491 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8492
8493 if (hdr->Command == SMB2_READ) {
8494 iov = &work->iov[work->iov_idx - 1];
8495 n_vec++;
8496 } else {
8497 iov = &work->iov[work->iov_idx];
8498 }
8499
8500 if (!ksmbd_sign_smb3_pdu(conn, signing_key, iov, n_vec,
8501 signature))
8502 memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE);
8503 }
8504
8505 /**
8506 * smb3_preauth_hash_rsp() - handler for computing preauth hash on response
8507 * @work: smb work containing response buffer
8508 *
8509 */
8510 void smb3_preauth_hash_rsp(struct ksmbd_work *work)
8511 {
8512 struct ksmbd_conn *conn = work->conn;
8513 struct ksmbd_session *sess = work->sess;
8514 struct smb2_hdr *req, *rsp;
8515
8516 if (conn->dialect != SMB311_PROT_ID)
8517 return;
8518
8519 WORK_BUFFERS(work, req, rsp);
8520
8521 if (le16_to_cpu(req->Command) == SMB2_NEGOTIATE_HE &&
8522 conn->preauth_info)
8523 ksmbd_gen_preauth_integrity_hash(conn, work->response_buf,
8524 conn->preauth_info->Preauth_HashValue);
8525
8526 if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE && sess) {
8527 __u8 *hash_value;
8528
8529 if (conn->binding) {
8530 struct preauth_session *preauth_sess;
8531
8532 preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id);
8533 if (!preauth_sess)
8534 return;
8535 hash_value = preauth_sess->Preauth_HashValue;
8536 } else {
8537 hash_value = sess->Preauth_HashValue;
8538 if (!hash_value)
8539 return;
8540 }
8541 ksmbd_gen_preauth_integrity_hash(conn, work->response_buf,
8542 hash_value);
8543 }
8544 }
8545
8546 static void fill_transform_hdr(void *tr_buf, char *old_buf, __le16 cipher_type)
8547 {
8548 struct smb2_transform_hdr *tr_hdr = tr_buf + 4;
8549 struct smb2_hdr *hdr = smb2_get_msg(old_buf);
8550 unsigned int orig_len = get_rfc1002_len(old_buf);
8551
8552 /* tr_buf must be cleared by the caller */
8553 tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
8554 tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
8555 tr_hdr->Flags = cpu_to_le16(TRANSFORM_FLAG_ENCRYPTED);
8556 if (cipher_type == SMB2_ENCRYPTION_AES128_GCM ||
8557 cipher_type == SMB2_ENCRYPTION_AES256_GCM)
8558 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
8559 else
8560 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
8561 memcpy(&tr_hdr->SessionId, &hdr->SessionId, 8);
8562 inc_rfc1001_len(tr_buf, sizeof(struct smb2_transform_hdr));
8563 inc_rfc1001_len(tr_buf, orig_len);
8564 }
8565
8566 int smb3_encrypt_resp(struct ksmbd_work *work)
8567 {
8568 struct kvec *iov = work->iov;
8569 int rc = -ENOMEM;
8570 void *tr_buf;
8571
8572 tr_buf = kzalloc(sizeof(struct smb2_transform_hdr) + 4, GFP_KERNEL);
8573 if (!tr_buf)
8574 return rc;
8575
8576 /* fill transform header */
8577 fill_transform_hdr(tr_buf, work->response_buf, work->conn->cipher_type);
8578
8579 iov[0].iov_base = tr_buf;
8580 iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4;
8581 work->tr_buf = tr_buf;
8582
8583 return ksmbd_crypt_message(work, iov, work->iov_idx + 1, 1);
8584 }
8585
8586 bool smb3_is_transform_hdr(void *buf)
8587 {
8588 struct smb2_transform_hdr *trhdr = smb2_get_msg(buf);
8589
8590 return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
8591 }
8592
8593 int smb3_decrypt_req(struct ksmbd_work *work)
8594 {
8595 struct ksmbd_session *sess;
8596 char *buf = work->request_buf;
8597 unsigned int pdu_length = get_rfc1002_len(buf);
8598 struct kvec iov[2];
8599 int buf_data_size = pdu_length - sizeof(struct smb2_transform_hdr);
8600 struct smb2_transform_hdr *tr_hdr = smb2_get_msg(buf);
8601 int rc = 0;
8602
8603 if (pdu_length < sizeof(struct smb2_transform_hdr) ||
8604 buf_data_size < sizeof(struct smb2_hdr)) {
8605 pr_err("Transform message is too small (%u)\n",
8606 pdu_length);
8607 return -ECONNABORTED;
8608 }
8609
8610 if (buf_data_size < le32_to_cpu(tr_hdr->OriginalMessageSize)) {
8611 pr_err("Transform message is broken\n");
8612 return -ECONNABORTED;
8613 }
8614
8615 sess = ksmbd_session_lookup_all(work->conn, le64_to_cpu(tr_hdr->SessionId));
8616 if (!sess) {
8617 pr_err("invalid session id(%llx) in transform header\n",
8618 le64_to_cpu(tr_hdr->SessionId));
8619 return -ECONNABORTED;
8620 }
8621
8622 iov[0].iov_base = buf;
8623 iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4;
8624 iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr) + 4;
8625 iov[1].iov_len = buf_data_size;
8626 rc = ksmbd_crypt_message(work, iov, 2, 0);
8627 if (rc)
8628 return rc;
8629
8630 memmove(buf + 4, iov[1].iov_base, buf_data_size);
8631 *(__be32 *)buf = cpu_to_be32(buf_data_size);
8632
8633 return rc;
8634 }
8635
8636 bool smb3_11_final_sess_setup_resp(struct ksmbd_work *work)
8637 {
8638 struct ksmbd_conn *conn = work->conn;
8639 struct ksmbd_session *sess = work->sess;
8640 struct smb2_hdr *rsp = smb2_get_msg(work->response_buf);
8641
8642 if (conn->dialect < SMB30_PROT_ID)
8643 return false;
8644
8645 if (work->next_smb2_rcv_hdr_off)
8646 rsp = ksmbd_resp_buf_next(work);
8647
8648 if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE &&
8649 sess->user && !user_guest(sess->user) &&
8650 rsp->Status == STATUS_SUCCESS)
8651 return true;
8652 return false;
8653 }
Mirror https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git