]>
Commit | Line | Data |
---|---|---|
929be906 | 1 | // SPDX-License-Identifier: LGPL-2.1 |
ec2e4523 | 2 | /* |
ec2e4523 | 3 | * |
2b80d049 | 4 | * Copyright (C) International Business Machines Corp., 2009, 2013 |
ec2e4523 PS |
5 | * Etersoft, 2012 |
6 | * Author(s): Steve French (sfrench@us.ibm.com) | |
7 | * Pavel Shilovsky (pshilovsky@samba.org) 2012 | |
8 | * | |
9 | * Contains the routines for constructing the SMB2 PDUs themselves | |
10 | * | |
ec2e4523 PS |
11 | */ |
12 | ||
13 | /* SMB2 PDU handling routines here - except for leftovers (eg session setup) */ | |
14 | /* Note that there are handle based routines which must be */ | |
15 | /* treated slightly differently for reconnection purposes since we never */ | |
16 | /* want to reuse a stale file handle and only the caller knows the file info */ | |
17 | ||
18 | #include <linux/fs.h> | |
19 | #include <linux/kernel.h> | |
20 | #include <linux/vfs.h> | |
09a4707e | 21 | #include <linux/task_io_accounting_ops.h> |
ec2e4523 | 22 | #include <linux/uaccess.h> |
c6e970a0 | 23 | #include <linux/uuid.h> |
33319141 | 24 | #include <linux/pagemap.h> |
ec2e4523 | 25 | #include <linux/xattr.h> |
ec2e4523 PS |
26 | #include "cifsglob.h" |
27 | #include "cifsacl.h" | |
28 | #include "cifsproto.h" | |
29 | #include "smb2proto.h" | |
30 | #include "cifs_unicode.h" | |
31 | #include "cifs_debug.h" | |
32 | #include "ntlmssp.h" | |
33 | #include "smb2status.h" | |
09a4707e | 34 | #include "smb2glob.h" |
d324f08d | 35 | #include "cifspdu.h" |
ceb1b0b9 | 36 | #include "cifs_spnego.h" |
db223a59 | 37 | #include "smbdirect.h" |
eccb4422 | 38 | #include "trace.h" |
a3a53b76 PA |
39 | #ifdef CONFIG_CIFS_DFS_UPCALL |
40 | #include "dfs_cache.h" | |
41 | #endif | |
05b98fd2 | 42 | #include "cached_dir.h" |
ec2e4523 PS |
43 | |
44 | /* | |
45 | * The following table defines the expected "StructureSize" of SMB2 requests | |
46 | * in order by SMB2 command. This is similar to "wct" in SMB/CIFS requests. | |
47 | * | |
48 | * Note that commands are defined in smb2pdu.h in le16 but the array below is | |
49 | * indexed by command in host byte order. | |
50 | */ | |
51 | static const int smb2_req_struct_sizes[NUMBER_OF_SMB2_COMMANDS] = { | |
52 | /* SMB2_NEGOTIATE */ 36, | |
53 | /* SMB2_SESSION_SETUP */ 25, | |
54 | /* SMB2_LOGOFF */ 4, | |
55 | /* SMB2_TREE_CONNECT */ 9, | |
56 | /* SMB2_TREE_DISCONNECT */ 4, | |
57 | /* SMB2_CREATE */ 57, | |
58 | /* SMB2_CLOSE */ 24, | |
59 | /* SMB2_FLUSH */ 24, | |
60 | /* SMB2_READ */ 49, | |
61 | /* SMB2_WRITE */ 49, | |
62 | /* SMB2_LOCK */ 48, | |
63 | /* SMB2_IOCTL */ 57, | |
64 | /* SMB2_CANCEL */ 4, | |
65 | /* SMB2_ECHO */ 4, | |
66 | /* SMB2_QUERY_DIRECTORY */ 33, | |
67 | /* SMB2_CHANGE_NOTIFY */ 32, | |
68 | /* SMB2_QUERY_INFO */ 41, | |
69 | /* SMB2_SET_INFO */ 33, | |
70 | /* SMB2_OPLOCK_BREAK */ 24 /* BB this is 36 for LEASE_BREAK variant */ | |
71 | }; | |
72 | ||
730928c8 | 73 | int smb3_encryption_required(const struct cifs_tcon *tcon) |
7fb8986e | 74 | { |
edb16135 | 75 | if (!tcon || !tcon->ses) |
ae6f8dd4 | 76 | return 0; |
7fb8986e PS |
77 | if ((tcon->ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) || |
78 | (tcon->share_flags & SHI1005_FLAGS_ENCRYPT_DATA)) | |
79 | return 1; | |
ae6f8dd4 PS |
80 | if (tcon->seal && |
81 | (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION)) | |
82 | return 1; | |
7fb8986e PS |
83 | return 0; |
84 | } | |
ec2e4523 PS |
85 | |
86 | static void | |
0d35e382 | 87 | smb2_hdr_assemble(struct smb2_hdr *shdr, __le16 smb2_cmd, |
352d96f3 AA |
88 | const struct cifs_tcon *tcon, |
89 | struct TCP_Server_Info *server) | |
ec2e4523 | 90 | { |
09ee7a3b | 91 | struct smb3_hdr_req *smb3_hdr; |
2c75426c | 92 | |
31473fc4 PS |
93 | shdr->ProtocolId = SMB2_PROTO_NUMBER; |
94 | shdr->StructureSize = cpu_to_le16(64); | |
95 | shdr->Command = smb2_cmd; | |
05d0f8f5 | 96 | |
352d96f3 | 97 | if (server) { |
05d0f8f5 SF |
98 | /* After reconnect SMB3 must set ChannelSequence on subsequent reqs */ |
99 | if (server->dialect >= SMB30_PROT_ID) { | |
100 | smb3_hdr = (struct smb3_hdr_req *)shdr; | |
101 | /* | |
102 | * if primary channel is not set yet, use default | |
103 | * channel for chan sequence num | |
104 | */ | |
105 | if (SERVER_IS_CHAN(server)) | |
106 | smb3_hdr->ChannelSequence = | |
107 | cpu_to_le16(server->primary_server->channel_sequence_num); | |
108 | else | |
109 | smb3_hdr->ChannelSequence = | |
110 | cpu_to_le16(server->channel_sequence_num); | |
111 | } | |
7d414f39 | 112 | spin_lock(&server->req_lock); |
69dc4b18 | 113 | /* Request up to 10 credits but don't go over the limit. */ |
141891f4 | 114 | if (server->credits >= server->max_credits) |
31473fc4 | 115 | shdr->CreditRequest = cpu_to_le16(0); |
7d414f39 | 116 | else |
31473fc4 | 117 | shdr->CreditRequest = cpu_to_le16( |
141891f4 | 118 | min_t(int, server->max_credits - |
69dc4b18 | 119 | server->credits, 10)); |
7d414f39 RL |
120 | spin_unlock(&server->req_lock); |
121 | } else { | |
31473fc4 | 122 | shdr->CreditRequest = cpu_to_le16(2); |
7d414f39 | 123 | } |
0d35e382 | 124 | shdr->Id.SyncId.ProcessId = cpu_to_le32((__u16)current->tgid); |
ec2e4523 PS |
125 | |
126 | if (!tcon) | |
127 | goto out; | |
128 | ||
2b80d049 SF |
129 | /* GLOBAL_CAP_LARGE_MTU will only be set if dialect > SMB2.02 */ |
130 | /* See sections 2.2.4 and 3.2.4.1.5 of MS-SMB2 */ | |
352d96f3 | 131 | if (server && (server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) |
31473fc4 | 132 | shdr->CreditCharge = cpu_to_le16(1); |
2b80d049 SF |
133 | /* else CreditCharge MBZ */ |
134 | ||
0d35e382 | 135 | shdr->Id.SyncId.TreeId = cpu_to_le32(tcon->tid); |
ec2e4523 PS |
136 | /* Uid is not converted */ |
137 | if (tcon->ses) | |
0d35e382 | 138 | shdr->SessionId = cpu_to_le64(tcon->ses->Suid); |
f87ab88b SF |
139 | |
140 | /* | |
141 | * If we would set SMB2_FLAGS_DFS_OPERATIONS on open we also would have | |
142 | * to pass the path on the Open SMB prefixed by \\server\share. | |
143 | * Not sure when we would need to do the augmented path (if ever) and | |
144 | * setting this flag breaks the SMB2 open operation since it is | |
145 | * illegal to send an empty path name (without \\server\share prefix) | |
146 | * when the DFS flag is set in the SMB open header. We could | |
147 | * consider setting the flag on all operations other than open | |
148 | * but it is safer to net set it for now. | |
149 | */ | |
150 | /* if (tcon->share_flags & SHI1005_FLAGS_DFS) | |
31473fc4 | 151 | shdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS; */ |
f87ab88b | 152 | |
352d96f3 | 153 | if (server && server->sign && !smb3_encryption_required(tcon)) |
31473fc4 | 154 | shdr->Flags |= SMB2_FLAGS_SIGNED; |
ec2e4523 | 155 | out: |
ec2e4523 PS |
156 | return; |
157 | } | |
158 | ||
159 | static int | |
352d96f3 AA |
160 | smb2_reconnect(__le16 smb2_command, struct cifs_tcon *tcon, |
161 | struct TCP_Server_Info *server) | |
ec2e4523 | 162 | { |
350f4a56 | 163 | int rc = 0; |
c24bb1a8 | 164 | struct nls_table *nls_codepage = NULL; |
aa24d1e9 | 165 | struct cifs_ses *ses; |
aa24d1e9 PS |
166 | |
167 | /* | |
168 | * SMB2s NegProt, SessSetup, Logoff do not have tcon yet so | |
169 | * check for tcp and smb session status done differently | |
170 | * for those three - in the calling routine. | |
171 | */ | |
172 | if (tcon == NULL) | |
7ffbe655 | 173 | return 0; |
aa24d1e9 | 174 | |
c88f7dcd PA |
175 | /* |
176 | * Need to also skip SMB2_IOCTL because it is used for checking nested dfs links in | |
177 | * cifs_tree_connect(). | |
178 | */ | |
179 | if (smb2_command == SMB2_TREE_CONNECT || smb2_command == SMB2_IOCTL) | |
7ffbe655 | 180 | return 0; |
aa24d1e9 | 181 | |
d7d7a66a | 182 | spin_lock(&tcon->tc_lock); |
fdf59eb5 | 183 | if (tcon->status == TID_EXITING) { |
aa24d1e9 | 184 | /* |
491eafce | 185 | * only tree disconnect allowed when disconnecting ... |
aa24d1e9 | 186 | */ |
491eafce | 187 | if (smb2_command != SMB2_TREE_DISCONNECT) { |
d7d7a66a | 188 | spin_unlock(&tcon->tc_lock); |
f96637be JP |
189 | cifs_dbg(FYI, "can not send cmd %d while umounting\n", |
190 | smb2_command); | |
aa24d1e9 PS |
191 | return -ENODEV; |
192 | } | |
193 | } | |
d7d7a66a | 194 | spin_unlock(&tcon->tc_lock); |
5bff9f74 PA |
195 | |
196 | ses = tcon->ses; | |
197 | if (!ses) | |
198 | return -EIO; | |
199 | spin_lock(&ses->ses_lock); | |
200 | if (ses->ses_status == SES_EXITING) { | |
201 | spin_unlock(&ses->ses_lock); | |
202 | return -EIO; | |
203 | } | |
204 | spin_unlock(&ses->ses_lock); | |
205 | if (!ses->server || !server) | |
aa24d1e9 PS |
206 | return -EIO; |
207 | ||
1bcd548d PA |
208 | spin_lock(&server->srv_lock); |
209 | if (server->tcpStatus == CifsNeedReconnect) { | |
210 | /* | |
211 | * Return to caller for TREE_DISCONNECT and LOGOFF and CLOSE | |
212 | * here since they are implicitly done when session drops. | |
213 | */ | |
214 | switch (smb2_command) { | |
215 | /* | |
216 | * BB Should we keep oplock break and add flush to exceptions? | |
217 | */ | |
218 | case SMB2_TREE_DISCONNECT: | |
219 | case SMB2_CANCEL: | |
220 | case SMB2_CLOSE: | |
221 | case SMB2_OPLOCK_BREAK: | |
222 | spin_unlock(&server->srv_lock); | |
223 | return -EAGAIN; | |
224 | } | |
225 | } | |
226 | spin_unlock(&server->srv_lock); | |
227 | ||
bc962159 | 228 | again: |
1bcd548d | 229 | rc = cifs_wait_for_server_reconnect(server, tcon->retry); |
3c0070f5 PA |
230 | if (rc) |
231 | return rc; | |
a3a53b76 | 232 | |
d1a931ce SP |
233 | spin_lock(&ses->chan_lock); |
234 | if (!cifs_chan_needs_reconnect(ses, server) && !tcon->need_reconnect) { | |
235 | spin_unlock(&ses->chan_lock); | |
7ffbe655 | 236 | return 0; |
d1a931ce | 237 | } |
88b024f5 | 238 | spin_unlock(&ses->chan_lock); |
d1a931ce SP |
239 | cifs_dbg(FYI, "sess reconnect mask: 0x%lx, tcon reconnect: %d", |
240 | tcon->ses->chans_need_reconnect, | |
241 | tcon->need_reconnect); | |
aa24d1e9 | 242 | |
bc962159 | 243 | mutex_lock(&ses->session_mutex); |
76e75270 SC |
244 | /* |
245 | * Recheck after acquire mutex. If another thread is negotiating | |
246 | * and the server never sends an answer the socket will be closed | |
247 | * and tcpStatus set to reconnect. | |
248 | */ | |
d7d7a66a | 249 | spin_lock(&server->srv_lock); |
76e75270 | 250 | if (server->tcpStatus == CifsNeedReconnect) { |
d7d7a66a | 251 | spin_unlock(&server->srv_lock); |
bc962159 SP |
252 | mutex_unlock(&ses->session_mutex); |
253 | ||
254 | if (tcon->retry) | |
255 | goto again; | |
256 | ||
76e75270 | 257 | rc = -EHOSTDOWN; |
76e75270 SC |
258 | goto out; |
259 | } | |
d7d7a66a | 260 | spin_unlock(&server->srv_lock); |
76e75270 | 261 | |
a43f95fd | 262 | nls_codepage = ses->local_nls; |
c24bb1a8 | 263 | |
d1a931ce SP |
264 | /* |
265 | * need to prevent multiple threads trying to simultaneously | |
266 | * reconnect the same SMB session | |
267 | */ | |
bc962159 | 268 | spin_lock(&ses->ses_lock); |
d1a931ce | 269 | spin_lock(&ses->chan_lock); |
bc962159 SP |
270 | if (!cifs_chan_needs_reconnect(ses, server) && |
271 | ses->ses_status == SES_GOOD) { | |
d1a931ce | 272 | spin_unlock(&ses->chan_lock); |
bc962159 | 273 | spin_unlock(&ses->ses_lock); |
f486ef8e | 274 | /* this means that we only need to tree connect */ |
d1a931ce SP |
275 | if (tcon->need_reconnect) |
276 | goto skip_sess_setup; | |
277 | ||
bc962159 | 278 | mutex_unlock(&ses->session_mutex); |
d1a931ce SP |
279 | goto out; |
280 | } | |
281 | spin_unlock(&ses->chan_lock); | |
bc962159 | 282 | spin_unlock(&ses->ses_lock); |
d1a931ce | 283 | |
f486ef8e | 284 | rc = cifs_negotiate_protocol(0, ses, server); |
d1a931ce | 285 | if (!rc) { |
f486ef8e | 286 | rc = cifs_setup_session(0, ses, server, nls_codepage); |
b0dd940e | 287 | if ((rc == -EACCES) && !tcon->retry) { |
f486ef8e | 288 | mutex_unlock(&ses->session_mutex); |
73f9bfbe | 289 | rc = -EHOSTDOWN; |
b0dd940e | 290 | goto failed; |
8ea21823 SP |
291 | } else if (rc) { |
292 | mutex_unlock(&ses->session_mutex); | |
293 | goto out; | |
b0dd940e | 294 | } |
3663c904 | 295 | } else { |
73f9bfbe | 296 | mutex_unlock(&ses->session_mutex); |
aa24d1e9 PS |
297 | goto out; |
298 | } | |
299 | ||
d1a931ce | 300 | skip_sess_setup: |
3663c904 SP |
301 | if (!tcon->need_reconnect) { |
302 | mutex_unlock(&ses->session_mutex); | |
303 | goto out; | |
304 | } | |
aa24d1e9 | 305 | cifs_mark_open_files_invalid(tcon); |
96a988ff PS |
306 | if (tcon->use_persistent) |
307 | tcon->need_reopen_files = true; | |
52ace1ef | 308 | |
565674d6 | 309 | rc = cifs_tree_connect(0, tcon, nls_codepage); |
73f9bfbe | 310 | mutex_unlock(&ses->session_mutex); |
52ace1ef | 311 | |
f96637be | 312 | cifs_dbg(FYI, "reconnect tcon rc = %d\n", rc); |
c318e6c2 SF |
313 | if (rc) { |
314 | /* If sess reconnected but tcon didn't, something strange ... */ | |
bc962159 | 315 | cifs_dbg(VFS, "reconnect tcon failed rc = %d\n", rc); |
aa24d1e9 | 316 | goto out; |
c318e6c2 | 317 | } |
96a988ff PS |
318 | |
319 | if (smb2_command != SMB2_INTERNAL_CMD) | |
b08484d7 | 320 | mod_delayed_work(cifsiod_wq, &server->reconnect, 0); |
96a988ff | 321 | |
aa24d1e9 | 322 | atomic_inc(&tconInfoReconnectCount); |
aa24d1e9 PS |
323 | out: |
324 | /* | |
325 | * Check if handle based operation so we know whether we can continue | |
326 | * or not without returning to caller to reset file handle. | |
327 | */ | |
328 | /* | |
329 | * BB Is flush done by server on drop of tcp session? Should we special | |
330 | * case it and skip above? | |
331 | */ | |
332 | switch (smb2_command) { | |
333 | case SMB2_FLUSH: | |
334 | case SMB2_READ: | |
335 | case SMB2_WRITE: | |
336 | case SMB2_LOCK: | |
aa24d1e9 PS |
337 | case SMB2_QUERY_DIRECTORY: |
338 | case SMB2_CHANGE_NOTIFY: | |
339 | case SMB2_QUERY_INFO: | |
340 | case SMB2_SET_INFO: | |
4772c795 | 341 | rc = -EAGAIN; |
aa24d1e9 | 342 | } |
b0dd940e | 343 | failed: |
ec2e4523 PS |
344 | return rc; |
345 | } | |
346 | ||
cb200bd6 | 347 | static void |
352d96f3 AA |
348 | fill_small_buf(__le16 smb2_command, struct cifs_tcon *tcon, |
349 | struct TCP_Server_Info *server, | |
350 | void *buf, | |
cb200bd6 PS |
351 | unsigned int *total_len) |
352 | { | |
0f46608a | 353 | struct smb2_pdu *spdu = buf; |
cb200bd6 PS |
354 | /* lookup word count ie StructureSize from table */ |
355 | __u16 parmsize = smb2_req_struct_sizes[le16_to_cpu(smb2_command)]; | |
356 | ||
357 | /* | |
358 | * smaller than SMALL_BUFFER_SIZE but bigger than fixed area of | |
359 | * largest operations (Create) | |
360 | */ | |
361 | memset(buf, 0, 256); | |
362 | ||
0d35e382 | 363 | smb2_hdr_assemble(&spdu->hdr, smb2_command, tcon, server); |
cb200bd6 PS |
364 | spdu->StructureSize2 = cpu_to_le16(parmsize); |
365 | ||
0d35e382 | 366 | *total_len = parmsize + sizeof(struct smb2_hdr); |
cb200bd6 PS |
367 | } |
368 | ||
ec2e4523 PS |
369 | /* |
370 | * Allocate and return pointer to an SMB request hdr, and set basic | |
371 | * SMB information in the SMB header. If the return code is zero, this | |
305428ac | 372 | * function must have filled in request_buf pointer. |
ec2e4523 | 373 | */ |
84a1f5b1 | 374 | static int __smb2_plain_req_init(__le16 smb2_command, struct cifs_tcon *tcon, |
352d96f3 AA |
375 | struct TCP_Server_Info *server, |
376 | void **request_buf, unsigned int *total_len) | |
ec2e4523 | 377 | { |
ec2e4523 | 378 | /* BB eventually switch this to SMB2 specific small buf size */ |
f46ecbd9 SB |
379 | if (smb2_command == SMB2_SET_INFO) |
380 | *request_buf = cifs_buf_get(); | |
381 | else | |
382 | *request_buf = cifs_small_buf_get(); | |
ec2e4523 PS |
383 | if (*request_buf == NULL) { |
384 | /* BB should we add a retry in here if not a writepage? */ | |
385 | return -ENOMEM; | |
386 | } | |
387 | ||
352d96f3 | 388 | fill_small_buf(smb2_command, tcon, server, |
0d35e382 | 389 | (struct smb2_hdr *)(*request_buf), |
305428ac | 390 | total_len); |
ec2e4523 PS |
391 | |
392 | if (tcon != NULL) { | |
ec2e4523 PS |
393 | uint16_t com_code = le16_to_cpu(smb2_command); |
394 | cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_sent[com_code]); | |
ec2e4523 PS |
395 | cifs_stats_inc(&tcon->num_smbs_sent); |
396 | } | |
397 | ||
84a1f5b1 PAS |
398 | return 0; |
399 | } | |
400 | ||
401 | static int smb2_plain_req_init(__le16 smb2_command, struct cifs_tcon *tcon, | |
352d96f3 | 402 | struct TCP_Server_Info *server, |
84a1f5b1 PAS |
403 | void **request_buf, unsigned int *total_len) |
404 | { | |
405 | int rc; | |
406 | ||
352d96f3 | 407 | rc = smb2_reconnect(smb2_command, tcon, server); |
84a1f5b1 PAS |
408 | if (rc) |
409 | return rc; | |
410 | ||
352d96f3 | 411 | return __smb2_plain_req_init(smb2_command, tcon, server, request_buf, |
84a1f5b1 PAS |
412 | total_len); |
413 | } | |
414 | ||
415 | static int smb2_ioctl_req_init(u32 opcode, struct cifs_tcon *tcon, | |
352d96f3 | 416 | struct TCP_Server_Info *server, |
84a1f5b1 PAS |
417 | void **request_buf, unsigned int *total_len) |
418 | { | |
419 | /* Skip reconnect only for FSCTL_VALIDATE_NEGOTIATE_INFO IOCTLs */ | |
420 | if (opcode == FSCTL_VALIDATE_NEGOTIATE_INFO) { | |
352d96f3 AA |
421 | return __smb2_plain_req_init(SMB2_IOCTL, tcon, server, |
422 | request_buf, total_len); | |
84a1f5b1 | 423 | } |
352d96f3 AA |
424 | return smb2_plain_req_init(SMB2_IOCTL, tcon, server, |
425 | request_buf, total_len); | |
ec2e4523 PS |
426 | } |
427 | ||
d7bef4c4 | 428 | /* For explanation of negotiate contexts see MS-SMB2 section 2.2.3.1 */ |
ebb3a9d4 SF |
429 | |
430 | static void | |
431 | build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt) | |
432 | { | |
433 | pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES; | |
434 | pneg_ctxt->DataLength = cpu_to_le16(38); | |
435 | pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1); | |
fc0b3844 RS |
436 | pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE); |
437 | get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE); | |
ebb3a9d4 SF |
438 | pneg_ctxt->HashAlgorithms = SMB2_PREAUTH_INTEGRITY_SHA512; |
439 | } | |
440 | ||
26ea888f SF |
441 | static void |
442 | build_compression_ctxt(struct smb2_compression_capabilities_context *pneg_ctxt) | |
443 | { | |
444 | pneg_ctxt->ContextType = SMB2_COMPRESSION_CAPABILITIES; | |
445 | pneg_ctxt->DataLength = | |
446 | cpu_to_le16(sizeof(struct smb2_compression_capabilities_context) | |
447 | - sizeof(struct smb2_neg_context)); | |
448 | pneg_ctxt->CompressionAlgorithmCount = cpu_to_le16(3); | |
449 | pneg_ctxt->CompressionAlgorithms[0] = SMB3_COMPRESS_LZ77; | |
450 | pneg_ctxt->CompressionAlgorithms[1] = SMB3_COMPRESS_LZ77_HUFF; | |
451 | pneg_ctxt->CompressionAlgorithms[2] = SMB3_COMPRESS_LZNT1; | |
452 | } | |
453 | ||
53d31a3f SF |
454 | static unsigned int |
455 | build_signing_ctxt(struct smb2_signing_capabilities *pneg_ctxt) | |
456 | { | |
457 | unsigned int ctxt_len = sizeof(struct smb2_signing_capabilities); | |
458 | unsigned short num_algs = 1; /* number of signing algorithms sent */ | |
459 | ||
460 | pneg_ctxt->ContextType = SMB2_SIGNING_CAPABILITIES; | |
461 | /* | |
462 | * Context Data length must be rounded to multiple of 8 for some servers | |
463 | */ | |
d7173623 EM |
464 | pneg_ctxt->DataLength = cpu_to_le16(ALIGN(sizeof(struct smb2_signing_capabilities) - |
465 | sizeof(struct smb2_neg_context) + | |
466 | (num_algs * sizeof(u16)), 8)); | |
53d31a3f SF |
467 | pneg_ctxt->SigningAlgorithmCount = cpu_to_le16(num_algs); |
468 | pneg_ctxt->SigningAlgorithms[0] = cpu_to_le16(SIGNING_ALG_AES_CMAC); | |
469 | ||
d7173623 EM |
470 | ctxt_len += sizeof(__le16) * num_algs; |
471 | ctxt_len = ALIGN(ctxt_len, 8); | |
53d31a3f SF |
472 | return ctxt_len; |
473 | /* TBD add SIGNING_ALG_AES_GMAC and/or SIGNING_ALG_HMAC_SHA256 */ | |
474 | } | |
475 | ||
ebb3a9d4 SF |
476 | static void |
477 | build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt) | |
478 | { | |
479 | pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES; | |
fbfd0b46 SF |
480 | if (require_gcm_256) { |
481 | pneg_ctxt->DataLength = cpu_to_le16(4); /* Cipher Count + 1 cipher */ | |
482 | pneg_ctxt->CipherCount = cpu_to_le16(1); | |
483 | pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES256_GCM; | |
29e27923 SF |
484 | } else if (enable_gcm_256) { |
485 | pneg_ctxt->DataLength = cpu_to_le16(8); /* Cipher Count + 3 ciphers */ | |
486 | pneg_ctxt->CipherCount = cpu_to_le16(3); | |
487 | pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES128_GCM; | |
488 | pneg_ctxt->Ciphers[1] = SMB2_ENCRYPTION_AES256_GCM; | |
489 | pneg_ctxt->Ciphers[2] = SMB2_ENCRYPTION_AES128_CCM; | |
fbfd0b46 SF |
490 | } else { |
491 | pneg_ctxt->DataLength = cpu_to_le16(6); /* Cipher Count + 2 ciphers */ | |
492 | pneg_ctxt->CipherCount = cpu_to_le16(2); | |
493 | pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES128_GCM; | |
494 | pneg_ctxt->Ciphers[1] = SMB2_ENCRYPTION_AES128_CCM; | |
495 | } | |
ebb3a9d4 SF |
496 | } |
497 | ||
96d3cca1 SF |
498 | static unsigned int |
499 | build_netname_ctxt(struct smb2_netname_neg_context *pneg_ctxt, char *hostname) | |
500 | { | |
501 | struct nls_table *cp = load_nls_default(); | |
502 | ||
503 | pneg_ctxt->ContextType = SMB2_NETNAME_NEGOTIATE_CONTEXT_ID; | |
504 | ||
505 | /* copy up to max of first 100 bytes of server name to NetName field */ | |
df58fae7 | 506 | pneg_ctxt->DataLength = cpu_to_le16(2 * cifs_strtoUTF16(pneg_ctxt->NetName, hostname, 100, cp)); |
96d3cca1 | 507 | /* context size is DataLength + minimal smb2_neg_context */ |
d7173623 | 508 | return ALIGN(le16_to_cpu(pneg_ctxt->DataLength) + sizeof(struct smb2_neg_context), 8); |
96d3cca1 SF |
509 | } |
510 | ||
fcef0db6 SF |
511 | static void |
512 | build_posix_ctxt(struct smb2_posix_neg_context *pneg_ctxt) | |
513 | { | |
514 | pneg_ctxt->ContextType = SMB2_POSIX_EXTENSIONS_AVAILABLE; | |
515 | pneg_ctxt->DataLength = cpu_to_le16(POSIX_CTXT_DATA_LEN); | |
0d481325 SF |
516 | /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */ |
517 | pneg_ctxt->Name[0] = 0x93; | |
518 | pneg_ctxt->Name[1] = 0xAD; | |
519 | pneg_ctxt->Name[2] = 0x25; | |
520 | pneg_ctxt->Name[3] = 0x50; | |
521 | pneg_ctxt->Name[4] = 0x9C; | |
522 | pneg_ctxt->Name[5] = 0xB4; | |
523 | pneg_ctxt->Name[6] = 0x11; | |
524 | pneg_ctxt->Name[7] = 0xE7; | |
525 | pneg_ctxt->Name[8] = 0xB4; | |
526 | pneg_ctxt->Name[9] = 0x23; | |
527 | pneg_ctxt->Name[10] = 0x83; | |
528 | pneg_ctxt->Name[11] = 0xDE; | |
529 | pneg_ctxt->Name[12] = 0x96; | |
530 | pneg_ctxt->Name[13] = 0x8B; | |
531 | pneg_ctxt->Name[14] = 0xCD; | |
532 | pneg_ctxt->Name[15] = 0x7C; | |
fcef0db6 SF |
533 | } |
534 | ||
ebb3a9d4 | 535 | static void |
13cacea7 | 536 | assemble_neg_contexts(struct smb2_negotiate_req *req, |
9fe5ff1c | 537 | struct TCP_Server_Info *server, unsigned int *total_len) |
ebb3a9d4 | 538 | { |
53d31a3f | 539 | unsigned int ctxt_len, neg_context_count; |
775e44d6 PA |
540 | struct TCP_Server_Info *pserver; |
541 | char *pneg_ctxt; | |
542 | char *hostname; | |
ebb3a9d4 | 543 | |
d5c7076b SF |
544 | if (*total_len > 200) { |
545 | /* In case length corrupted don't want to overrun smb buffer */ | |
afe6f653 | 546 | cifs_server_dbg(VFS, "Bad frame length assembling neg contexts\n"); |
d5c7076b SF |
547 | return; |
548 | } | |
549 | ||
550 | /* | |
551 | * round up total_len of fixed part of SMB3 negotiate request to 8 | |
552 | * byte boundary before adding negotiate contexts | |
553 | */ | |
d7173623 | 554 | *total_len = ALIGN(*total_len, 8); |
d5c7076b SF |
555 | |
556 | pneg_ctxt = (*total_len) + (char *)req; | |
557 | req->NegotiateContextOffset = cpu_to_le32(*total_len); | |
558 | ||
ebb3a9d4 | 559 | build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt); |
d7173623 | 560 | ctxt_len = ALIGN(sizeof(struct smb2_preauth_neg_context), 8); |
fcef0db6 SF |
561 | *total_len += ctxt_len; |
562 | pneg_ctxt += ctxt_len; | |
13cacea7 | 563 | |
ebb3a9d4 | 564 | build_encrypt_ctxt((struct smb2_encryption_neg_context *)pneg_ctxt); |
d7173623 | 565 | ctxt_len = ALIGN(sizeof(struct smb2_encryption_neg_context), 8); |
fcef0db6 SF |
566 | *total_len += ctxt_len; |
567 | pneg_ctxt += ctxt_len; | |
568 | ||
9de74996 SP |
569 | /* |
570 | * secondary channels don't have the hostname field populated | |
571 | * use the hostname field in the primary channel instead | |
572 | */ | |
b3773b19 | 573 | pserver = SERVER_IS_CHAN(server) ? server->primary_server : server; |
775e44d6 PA |
574 | cifs_server_lock(pserver); |
575 | hostname = pserver->hostname; | |
9de74996 | 576 | if (hostname && (hostname[0] != 0)) { |
73130a7b | 577 | ctxt_len = build_netname_ctxt((struct smb2_netname_neg_context *)pneg_ctxt, |
9de74996 | 578 | hostname); |
73130a7b SF |
579 | *total_len += ctxt_len; |
580 | pneg_ctxt += ctxt_len; | |
73130a7b | 581 | neg_context_count = 3; |
32f31918 SF |
582 | } else |
583 | neg_context_count = 2; | |
775e44d6 | 584 | cifs_server_unlock(pserver); |
32f31918 SF |
585 | |
586 | build_posix_ctxt((struct smb2_posix_neg_context *)pneg_ctxt); | |
587 | *total_len += sizeof(struct smb2_posix_neg_context); | |
588 | pneg_ctxt += sizeof(struct smb2_posix_neg_context); | |
589 | neg_context_count++; | |
53d31a3f | 590 | |
9fe5ff1c SF |
591 | if (server->compress_algorithm) { |
592 | build_compression_ctxt((struct smb2_compression_capabilities_context *) | |
26ea888f | 593 | pneg_ctxt); |
d7173623 | 594 | ctxt_len = ALIGN(sizeof(struct smb2_compression_capabilities_context), 8); |
9fe5ff1c SF |
595 | *total_len += ctxt_len; |
596 | pneg_ctxt += ctxt_len; | |
53d31a3f SF |
597 | neg_context_count++; |
598 | } | |
96d3cca1 | 599 | |
53d31a3f SF |
600 | if (enable_negotiate_signing) { |
601 | ctxt_len = build_signing_ctxt((struct smb2_signing_capabilities *) | |
602 | pneg_ctxt); | |
603 | *total_len += ctxt_len; | |
604 | pneg_ctxt += ctxt_len; | |
605 | neg_context_count++; | |
606 | } | |
607 | ||
608 | /* check for and add transport_capabilities and signing capabilities */ | |
609 | req->NegotiateContextCount = cpu_to_le16(neg_context_count); | |
96d3cca1 | 610 | |
ebb3a9d4 | 611 | } |
5100d8a3 | 612 | |
5105a7ff | 613 | /* If invalid preauth context warn but use what we requested, SHA-512 */ |
5100d8a3 SF |
614 | static void decode_preauth_context(struct smb2_preauth_neg_context *ctxt) |
615 | { | |
616 | unsigned int len = le16_to_cpu(ctxt->DataLength); | |
617 | ||
5105a7ff DD |
618 | /* |
619 | * Caller checked that DataLength remains within SMB boundary. We still | |
620 | * need to confirm that one HashAlgorithms member is accounted for. | |
621 | */ | |
5100d8a3 | 622 | if (len < MIN_PREAUTH_CTXT_DATA_LEN) { |
a0a3036b | 623 | pr_warn_once("server sent bad preauth context\n"); |
5100d8a3 | 624 | return; |
7955f105 SF |
625 | } else if (len < MIN_PREAUTH_CTXT_DATA_LEN + le16_to_cpu(ctxt->SaltLength)) { |
626 | pr_warn_once("server sent invalid SaltLength\n"); | |
627 | return; | |
5100d8a3 SF |
628 | } |
629 | if (le16_to_cpu(ctxt->HashAlgorithmCount) != 1) | |
a0a3036b | 630 | pr_warn_once("Invalid SMB3 hash algorithm count\n"); |
5100d8a3 | 631 | if (ctxt->HashAlgorithms != SMB2_PREAUTH_INTEGRITY_SHA512) |
a0a3036b | 632 | pr_warn_once("unknown SMB3 hash algorithm\n"); |
5100d8a3 SF |
633 | } |
634 | ||
26ea888f SF |
635 | static void decode_compress_ctx(struct TCP_Server_Info *server, |
636 | struct smb2_compression_capabilities_context *ctxt) | |
637 | { | |
638 | unsigned int len = le16_to_cpu(ctxt->DataLength); | |
639 | ||
5105a7ff DD |
640 | /* |
641 | * Caller checked that DataLength remains within SMB boundary. We still | |
642 | * need to confirm that one CompressionAlgorithms member is accounted | |
643 | * for. | |
644 | */ | |
26ea888f | 645 | if (len < 10) { |
a0a3036b | 646 | pr_warn_once("server sent bad compression cntxt\n"); |
26ea888f SF |
647 | return; |
648 | } | |
649 | if (le16_to_cpu(ctxt->CompressionAlgorithmCount) != 1) { | |
a0a3036b | 650 | pr_warn_once("Invalid SMB3 compress algorithm count\n"); |
26ea888f SF |
651 | return; |
652 | } | |
653 | if (le16_to_cpu(ctxt->CompressionAlgorithms[0]) > 3) { | |
a0a3036b | 654 | pr_warn_once("unknown compression algorithm\n"); |
26ea888f SF |
655 | return; |
656 | } | |
657 | server->compress_algorithm = ctxt->CompressionAlgorithms[0]; | |
658 | } | |
659 | ||
5100d8a3 SF |
660 | static int decode_encrypt_ctx(struct TCP_Server_Info *server, |
661 | struct smb2_encryption_neg_context *ctxt) | |
662 | { | |
663 | unsigned int len = le16_to_cpu(ctxt->DataLength); | |
664 | ||
665 | cifs_dbg(FYI, "decode SMB3.11 encryption neg context of len %d\n", len); | |
5105a7ff DD |
666 | /* |
667 | * Caller checked that DataLength remains within SMB boundary. We still | |
668 | * need to confirm that one Cipher flexible array member is accounted | |
669 | * for. | |
670 | */ | |
5100d8a3 | 671 | if (len < MIN_ENCRYPT_CTXT_DATA_LEN) { |
a0a3036b | 672 | pr_warn_once("server sent bad crypto ctxt len\n"); |
5100d8a3 SF |
673 | return -EINVAL; |
674 | } | |
675 | ||
676 | if (le16_to_cpu(ctxt->CipherCount) != 1) { | |
a0a3036b | 677 | pr_warn_once("Invalid SMB3.11 cipher count\n"); |
5100d8a3 SF |
678 | return -EINVAL; |
679 | } | |
680 | cifs_dbg(FYI, "SMB311 cipher type:%d\n", le16_to_cpu(ctxt->Ciphers[0])); | |
511ac89e SF |
681 | if (require_gcm_256) { |
682 | if (ctxt->Ciphers[0] != SMB2_ENCRYPTION_AES256_GCM) { | |
683 | cifs_dbg(VFS, "Server does not support requested encryption type (AES256 GCM)\n"); | |
684 | return -EOPNOTSUPP; | |
685 | } | |
686 | } else if (ctxt->Ciphers[0] == 0) { | |
acf96fef SF |
687 | /* |
688 | * e.g. if server only supported AES256_CCM (very unlikely) | |
689 | * or server supported no encryption types or had all disabled. | |
690 | * Since GLOBAL_CAP_ENCRYPTION will be not set, in the case | |
691 | * in which mount requested encryption ("seal") checks later | |
692 | * on during tree connection will return proper rc, but if | |
693 | * seal not requested by client, since server is allowed to | |
694 | * return 0 to indicate no supported cipher, we can't fail here | |
695 | */ | |
696 | server->cipher_type = 0; | |
697 | server->capabilities &= ~SMB2_GLOBAL_CAP_ENCRYPTION; | |
698 | pr_warn_once("Server does not support requested encryption types\n"); | |
699 | return 0; | |
511ac89e SF |
700 | } else if ((ctxt->Ciphers[0] != SMB2_ENCRYPTION_AES128_CCM) && |
701 | (ctxt->Ciphers[0] != SMB2_ENCRYPTION_AES128_GCM) && | |
702 | (ctxt->Ciphers[0] != SMB2_ENCRYPTION_AES256_GCM)) { | |
703 | /* server returned a cipher we didn't ask for */ | |
a0a3036b | 704 | pr_warn_once("Invalid SMB3.11 cipher returned\n"); |
5100d8a3 SF |
705 | return -EINVAL; |
706 | } | |
707 | server->cipher_type = ctxt->Ciphers[0]; | |
23657ad7 | 708 | server->capabilities |= SMB2_GLOBAL_CAP_ENCRYPTION; |
5100d8a3 SF |
709 | return 0; |
710 | } | |
711 | ||
53d31a3f SF |
712 | static void decode_signing_ctx(struct TCP_Server_Info *server, |
713 | struct smb2_signing_capabilities *pctxt) | |
714 | { | |
715 | unsigned int len = le16_to_cpu(pctxt->DataLength); | |
716 | ||
5105a7ff DD |
717 | /* |
718 | * Caller checked that DataLength remains within SMB boundary. We still | |
719 | * need to confirm that one SigningAlgorithms flexible array member is | |
720 | * accounted for. | |
721 | */ | |
53d31a3f SF |
722 | if ((len < 4) || (len > 16)) { |
723 | pr_warn_once("server sent bad signing negcontext\n"); | |
724 | return; | |
725 | } | |
726 | if (le16_to_cpu(pctxt->SigningAlgorithmCount) != 1) { | |
727 | pr_warn_once("Invalid signing algorithm count\n"); | |
728 | return; | |
729 | } | |
730 | if (le16_to_cpu(pctxt->SigningAlgorithms[0]) > 2) { | |
731 | pr_warn_once("unknown signing algorithm\n"); | |
732 | return; | |
733 | } | |
734 | ||
735 | server->signing_negotiated = true; | |
736 | server->signing_algorithm = le16_to_cpu(pctxt->SigningAlgorithms[0]); | |
737 | cifs_dbg(FYI, "signing algorithm %d chosen\n", | |
738 | server->signing_algorithm); | |
739 | } | |
740 | ||
741 | ||
5100d8a3 | 742 | static int smb311_decode_neg_context(struct smb2_negotiate_rsp *rsp, |
977b6170 RS |
743 | struct TCP_Server_Info *server, |
744 | unsigned int len_of_smb) | |
5100d8a3 SF |
745 | { |
746 | struct smb2_neg_context *pctx; | |
747 | unsigned int offset = le32_to_cpu(rsp->NegotiateContextOffset); | |
748 | unsigned int ctxt_cnt = le16_to_cpu(rsp->NegotiateContextCount); | |
5100d8a3 SF |
749 | unsigned int len_of_ctxts, i; |
750 | int rc = 0; | |
751 | ||
752 | cifs_dbg(FYI, "decoding %d negotiate contexts\n", ctxt_cnt); | |
753 | if (len_of_smb <= offset) { | |
afe6f653 | 754 | cifs_server_dbg(VFS, "Invalid response: negotiate context offset\n"); |
5100d8a3 SF |
755 | return -EINVAL; |
756 | } | |
757 | ||
758 | len_of_ctxts = len_of_smb - offset; | |
759 | ||
760 | for (i = 0; i < ctxt_cnt; i++) { | |
761 | int clen; | |
762 | /* check that offset is not beyond end of SMB */ | |
5100d8a3 SF |
763 | if (len_of_ctxts < sizeof(struct smb2_neg_context)) |
764 | break; | |
765 | ||
1fc6ad2f | 766 | pctx = (struct smb2_neg_context *)(offset + (char *)rsp); |
5105a7ff DD |
767 | clen = sizeof(struct smb2_neg_context) |
768 | + le16_to_cpu(pctx->DataLength); | |
769 | /* | |
770 | * 2.2.4 SMB2 NEGOTIATE Response | |
771 | * Subsequent negotiate contexts MUST appear at the first 8-byte | |
772 | * aligned offset following the previous negotiate context. | |
773 | */ | |
774 | if (i + 1 != ctxt_cnt) | |
775 | clen = ALIGN(clen, 8); | |
5100d8a3 SF |
776 | if (clen > len_of_ctxts) |
777 | break; | |
778 | ||
779 | if (pctx->ContextType == SMB2_PREAUTH_INTEGRITY_CAPABILITIES) | |
780 | decode_preauth_context( | |
781 | (struct smb2_preauth_neg_context *)pctx); | |
782 | else if (pctx->ContextType == SMB2_ENCRYPTION_CAPABILITIES) | |
783 | rc = decode_encrypt_ctx(server, | |
784 | (struct smb2_encryption_neg_context *)pctx); | |
26ea888f SF |
785 | else if (pctx->ContextType == SMB2_COMPRESSION_CAPABILITIES) |
786 | decode_compress_ctx(server, | |
787 | (struct smb2_compression_capabilities_context *)pctx); | |
fcef0db6 SF |
788 | else if (pctx->ContextType == SMB2_POSIX_EXTENSIONS_AVAILABLE) |
789 | server->posix_ext_supported = true; | |
53d31a3f SF |
790 | else if (pctx->ContextType == SMB2_SIGNING_CAPABILITIES) |
791 | decode_signing_ctx(server, | |
792 | (struct smb2_signing_capabilities *)pctx); | |
5100d8a3 | 793 | else |
afe6f653 | 794 | cifs_server_dbg(VFS, "unknown negcontext of type %d ignored\n", |
5100d8a3 | 795 | le16_to_cpu(pctx->ContextType)); |
5100d8a3 SF |
796 | if (rc) |
797 | break; | |
5105a7ff DD |
798 | |
799 | offset += clen; | |
5100d8a3 SF |
800 | len_of_ctxts -= clen; |
801 | } | |
802 | return rc; | |
803 | } | |
804 | ||
ce558b0e SF |
805 | static struct create_posix * |
806 | create_posix_buf(umode_t mode) | |
807 | { | |
808 | struct create_posix *buf; | |
809 | ||
810 | buf = kzalloc(sizeof(struct create_posix), | |
811 | GFP_KERNEL); | |
812 | if (!buf) | |
813 | return NULL; | |
814 | ||
815 | buf->ccontext.DataOffset = | |
816 | cpu_to_le16(offsetof(struct create_posix, Mode)); | |
817 | buf->ccontext.DataLength = cpu_to_le32(4); | |
818 | buf->ccontext.NameOffset = | |
819 | cpu_to_le16(offsetof(struct create_posix, Name)); | |
820 | buf->ccontext.NameLength = cpu_to_le16(16); | |
821 | ||
822 | /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */ | |
823 | buf->Name[0] = 0x93; | |
824 | buf->Name[1] = 0xAD; | |
825 | buf->Name[2] = 0x25; | |
826 | buf->Name[3] = 0x50; | |
827 | buf->Name[4] = 0x9C; | |
828 | buf->Name[5] = 0xB4; | |
829 | buf->Name[6] = 0x11; | |
830 | buf->Name[7] = 0xE7; | |
831 | buf->Name[8] = 0xB4; | |
832 | buf->Name[9] = 0x23; | |
833 | buf->Name[10] = 0x83; | |
834 | buf->Name[11] = 0xDE; | |
835 | buf->Name[12] = 0x96; | |
836 | buf->Name[13] = 0x8B; | |
837 | buf->Name[14] = 0xCD; | |
838 | buf->Name[15] = 0x7C; | |
839 | buf->Mode = cpu_to_le32(mode); | |
a0a3036b | 840 | cifs_dbg(FYI, "mode on posix create 0%o\n", mode); |
ce558b0e SF |
841 | return buf; |
842 | } | |
843 | ||
844 | static int | |
845 | add_posix_context(struct kvec *iov, unsigned int *num_iovec, umode_t mode) | |
846 | { | |
ce558b0e SF |
847 | unsigned int num = *num_iovec; |
848 | ||
849 | iov[num].iov_base = create_posix_buf(mode); | |
d0959b08 | 850 | if (mode == ACL_NO_MODE) |
c8ebf077 | 851 | cifs_dbg(FYI, "%s: no mode\n", __func__); |
ce558b0e SF |
852 | if (iov[num].iov_base == NULL) |
853 | return -ENOMEM; | |
854 | iov[num].iov_len = sizeof(struct create_posix); | |
ce558b0e SF |
855 | *num_iovec = num + 1; |
856 | return 0; | |
857 | } | |
858 | ||
ebb3a9d4 | 859 | |
ec2e4523 PS |
860 | /* |
861 | * | |
862 | * SMB2 Worker functions follow: | |
863 | * | |
864 | * The general structure of the worker functions is: | |
865 | * 1) Call smb2_init (assembles SMB2 header) | |
866 | * 2) Initialize SMB2 command specific fields in fixed length area of SMB | |
867 | * 3) Call smb_sendrcv2 (sends request on socket and waits for response) | |
868 | * 4) Decode SMB2 command specific fields in the fixed length area | |
869 | * 5) Decode variable length data area (if any for this SMB2 command type) | |
870 | * 6) Call free smb buffer | |
871 | * 7) return | |
872 | * | |
873 | */ | |
874 | ||
875 | int | |
f486ef8e SP |
876 | SMB2_negotiate(const unsigned int xid, |
877 | struct cifs_ses *ses, | |
878 | struct TCP_Server_Info *server) | |
ec2e4523 | 879 | { |
40eff45b | 880 | struct smb_rqst rqst; |
ec2e4523 PS |
881 | struct smb2_negotiate_req *req; |
882 | struct smb2_negotiate_rsp *rsp; | |
883 | struct kvec iov[1]; | |
da502f7d | 884 | struct kvec rsp_iov; |
f5823f5e | 885 | int rc; |
ec2e4523 | 886 | int resp_buftype; |
ec2e4523 PS |
887 | int blob_offset, blob_length; |
888 | char *security_blob; | |
889 | int flags = CIFS_NEG_OP; | |
13cacea7 | 890 | unsigned int total_len; |
ec2e4523 | 891 | |
f96637be | 892 | cifs_dbg(FYI, "Negotiate protocol\n"); |
ec2e4523 | 893 | |
3534b850 JL |
894 | if (!server) { |
895 | WARN(1, "%s: server is NULL!\n", __func__); | |
896 | return -EIO; | |
ec2e4523 PS |
897 | } |
898 | ||
352d96f3 AA |
899 | rc = smb2_plain_req_init(SMB2_NEGOTIATE, NULL, server, |
900 | (void **) &req, &total_len); | |
ec2e4523 PS |
901 | if (rc) |
902 | return rc; | |
903 | ||
0d35e382 | 904 | req->hdr.SessionId = 0; |
0fdfef9a | 905 | |
8bd68c6e AA |
906 | memset(server->preauth_sha_hash, 0, SMB2_PREAUTH_HASH_SIZE); |
907 | memset(ses->preauth_sha_hash, 0, SMB2_PREAUTH_HASH_SIZE); | |
ec2e4523 | 908 | |
f6a6bf7c | 909 | if (strcmp(server->vals->version_string, |
9764c02f SF |
910 | SMB3ANY_VERSION_STRING) == 0) { |
911 | req->Dialects[0] = cpu_to_le16(SMB30_PROT_ID); | |
912 | req->Dialects[1] = cpu_to_le16(SMB302_PROT_ID); | |
6dffa4c2 SF |
913 | req->Dialects[2] = cpu_to_le16(SMB311_PROT_ID); |
914 | req->DialectCount = cpu_to_le16(3); | |
915 | total_len += 6; | |
afe6f653 | 916 | } else if (strcmp(server->vals->version_string, |
9764c02f SF |
917 | SMBDEFAULT_VERSION_STRING) == 0) { |
918 | req->Dialects[0] = cpu_to_le16(SMB21_PROT_ID); | |
919 | req->Dialects[1] = cpu_to_le16(SMB30_PROT_ID); | |
920 | req->Dialects[2] = cpu_to_le16(SMB302_PROT_ID); | |
d5c7076b SF |
921 | req->Dialects[3] = cpu_to_le16(SMB311_PROT_ID); |
922 | req->DialectCount = cpu_to_le16(4); | |
923 | total_len += 8; | |
9764c02f SF |
924 | } else { |
925 | /* otherwise send specific dialect */ | |
f6a6bf7c | 926 | req->Dialects[0] = cpu_to_le16(server->vals->protocol_id); |
9764c02f | 927 | req->DialectCount = cpu_to_le16(1); |
13cacea7 | 928 | total_len += 2; |
9764c02f | 929 | } |
ec2e4523 PS |
930 | |
931 | /* only one of SMB2 signing flags may be set in SMB2 request */ | |
38d77c50 | 932 | if (ses->sign) |
9cd2e62c | 933 | req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED); |
38d77c50 | 934 | else if (global_secflags & CIFSSEC_MAY_SIGN) |
9cd2e62c | 935 | req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED); |
38d77c50 JL |
936 | else |
937 | req->SecurityMode = 0; | |
ec2e4523 | 938 | |
afe6f653 | 939 | req->Capabilities = cpu_to_le32(server->vals->req_capabilities); |
679971e7 SF |
940 | if (ses->chan_max > 1) |
941 | req->Capabilities |= cpu_to_le32(SMB2_GLOBAL_CAP_MULTI_CHANNEL); | |
ec2e4523 | 942 | |
3c5f9be1 | 943 | /* ClientGUID must be zero for SMB2.02 dialect */ |
afe6f653 | 944 | if (server->vals->protocol_id == SMB20_PROT_ID) |
3c5f9be1 | 945 | memset(req->ClientGUID, 0, SMB2_CLIENT_GUID_SIZE); |
ebb3a9d4 | 946 | else { |
3c5f9be1 SF |
947 | memcpy(req->ClientGUID, server->client_guid, |
948 | SMB2_CLIENT_GUID_SIZE); | |
afe6f653 | 949 | if ((server->vals->protocol_id == SMB311_PROT_ID) || |
6dffa4c2 SF |
950 | (strcmp(server->vals->version_string, |
951 | SMB3ANY_VERSION_STRING) == 0) || | |
afe6f653 | 952 | (strcmp(server->vals->version_string, |
d5c7076b | 953 | SMBDEFAULT_VERSION_STRING) == 0)) |
9fe5ff1c | 954 | assemble_neg_contexts(req, server, &total_len); |
ebb3a9d4 | 955 | } |
ec2e4523 | 956 | iov[0].iov_base = (char *)req; |
13cacea7 | 957 | iov[0].iov_len = total_len; |
ec2e4523 | 958 | |
40eff45b RS |
959 | memset(&rqst, 0, sizeof(struct smb_rqst)); |
960 | rqst.rq_iov = iov; | |
961 | rqst.rq_nvec = 1; | |
962 | ||
352d96f3 AA |
963 | rc = cifs_send_recv(xid, ses, server, |
964 | &rqst, &resp_buftype, flags, &rsp_iov); | |
da502f7d PS |
965 | cifs_small_buf_release(req); |
966 | rsp = (struct smb2_negotiate_rsp *)rsp_iov.iov_base; | |
ec2e4523 PS |
967 | /* |
968 | * No tcon so can't do | |
969 | * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]); | |
970 | */ | |
7e682f76 | 971 | if (rc == -EOPNOTSUPP) { |
a0a3036b | 972 | cifs_server_dbg(VFS, "Dialect not supported by server. Consider specifying vers=1.0 or vers=2.0 on mount for accessing older servers\n"); |
7e682f76 SF |
973 | goto neg_exit; |
974 | } else if (rc != 0) | |
ec2e4523 PS |
975 | goto neg_exit; |
976 | ||
27893dfc | 977 | rc = -EIO; |
afe6f653 | 978 | if (strcmp(server->vals->version_string, |
9764c02f SF |
979 | SMB3ANY_VERSION_STRING) == 0) { |
980 | if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) { | |
afe6f653 | 981 | cifs_server_dbg(VFS, |
9764c02f | 982 | "SMB2 dialect returned but not requested\n"); |
27893dfc | 983 | goto neg_exit; |
9764c02f | 984 | } else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) { |
afe6f653 | 985 | cifs_server_dbg(VFS, |
9764c02f | 986 | "SMB2.1 dialect returned but not requested\n"); |
27893dfc | 987 | goto neg_exit; |
6dffa4c2 SF |
988 | } else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID)) { |
989 | /* ops set to 3.0 by default for default so update */ | |
990 | server->ops = &smb311_operations; | |
991 | server->vals = &smb311_values; | |
9764c02f | 992 | } |
afe6f653 | 993 | } else if (strcmp(server->vals->version_string, |
9764c02f SF |
994 | SMBDEFAULT_VERSION_STRING) == 0) { |
995 | if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) { | |
afe6f653 | 996 | cifs_server_dbg(VFS, |
9764c02f | 997 | "SMB2 dialect returned but not requested\n"); |
27893dfc | 998 | goto neg_exit; |
9764c02f SF |
999 | } else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) { |
1000 | /* ops set to 3.0 by default for default so update */ | |
afe6f653 RS |
1001 | server->ops = &smb21_operations; |
1002 | server->vals = &smb21_values; | |
b57a55e2 | 1003 | } else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID)) { |
afe6f653 RS |
1004 | server->ops = &smb311_operations; |
1005 | server->vals = &smb311_values; | |
b57a55e2 | 1006 | } |
590d08d3 | 1007 | } else if (le16_to_cpu(rsp->DialectRevision) != |
afe6f653 | 1008 | server->vals->protocol_id) { |
9764c02f | 1009 | /* if requested single dialect ensure returned dialect matched */ |
a0a3036b JP |
1010 | cifs_server_dbg(VFS, "Invalid 0x%x dialect returned: not requested\n", |
1011 | le16_to_cpu(rsp->DialectRevision)); | |
27893dfc | 1012 | goto neg_exit; |
9764c02f SF |
1013 | } |
1014 | ||
f96637be | 1015 | cifs_dbg(FYI, "mode 0x%x\n", rsp->SecurityMode); |
ec2e4523 | 1016 | |
e4aa25e7 | 1017 | if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) |
f96637be | 1018 | cifs_dbg(FYI, "negotiated smb2.0 dialect\n"); |
e4aa25e7 | 1019 | else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) |
f96637be | 1020 | cifs_dbg(FYI, "negotiated smb2.1 dialect\n"); |
e4aa25e7 | 1021 | else if (rsp->DialectRevision == cpu_to_le16(SMB30_PROT_ID)) |
f96637be | 1022 | cifs_dbg(FYI, "negotiated smb3.0 dialect\n"); |
20b6d8b4 SF |
1023 | else if (rsp->DialectRevision == cpu_to_le16(SMB302_PROT_ID)) |
1024 | cifs_dbg(FYI, "negotiated smb3.02 dialect\n"); | |
5f7fbf73 SF |
1025 | else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID)) |
1026 | cifs_dbg(FYI, "negotiated smb3.1.1 dialect\n"); | |
ec2e4523 | 1027 | else { |
a0a3036b JP |
1028 | cifs_server_dbg(VFS, "Invalid dialect returned by server 0x%x\n", |
1029 | le16_to_cpu(rsp->DialectRevision)); | |
ec2e4523 PS |
1030 | goto neg_exit; |
1031 | } | |
27893dfc EM |
1032 | |
1033 | rc = 0; | |
ec2e4523 PS |
1034 | server->dialect = le16_to_cpu(rsp->DialectRevision); |
1035 | ||
8bd68c6e AA |
1036 | /* |
1037 | * Keep a copy of the hash after negprot. This hash will be | |
1038 | * the starting hash value for all sessions made from this | |
1039 | * server. | |
1040 | */ | |
1041 | memcpy(server->preauth_sha_hash, ses->preauth_sha_hash, | |
1042 | SMB2_PREAUTH_HASH_SIZE); | |
0fdfef9a | 1043 | |
e598d1d8 JL |
1044 | /* SMB2 only has an extended negflavor */ |
1045 | server->negflavor = CIFS_NEGFLAVOR_EXTENDED; | |
2365c4ea PS |
1046 | /* set it to the maximum buffer size value we can send with 1 credit */ |
1047 | server->maxBuf = min_t(unsigned int, le32_to_cpu(rsp->MaxTransactSize), | |
1048 | SMB2_MAX_BUFFER_SIZE); | |
ec2e4523 PS |
1049 | server->max_read = le32_to_cpu(rsp->MaxReadSize); |
1050 | server->max_write = le32_to_cpu(rsp->MaxWriteSize); | |
ec2e4523 | 1051 | server->sec_mode = le16_to_cpu(rsp->SecurityMode); |
07108d0e SF |
1052 | if ((server->sec_mode & SMB2_SEC_MODE_FLAGS_ALL) != server->sec_mode) |
1053 | cifs_dbg(FYI, "Server returned unexpected security mode 0x%x\n", | |
1054 | server->sec_mode); | |
ec2e4523 | 1055 | server->capabilities = le32_to_cpu(rsp->Capabilities); |
29e20f9c PS |
1056 | /* Internal types */ |
1057 | server->capabilities |= SMB2_NT_FIND | SMB2_LARGE_FILES; | |
ec2e4523 | 1058 | |
6d2fcfe6 AA |
1059 | /* |
1060 | * SMB3.0 supports only 1 cipher and doesn't have a encryption neg context | |
1061 | * Set the cipher type manually. | |
1062 | */ | |
1063 | if (server->dialect == SMB30_PROT_ID && (server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION)) | |
1064 | server->cipher_type = SMB2_ENCRYPTION_AES128_CCM; | |
1065 | ||
ec2e4523 | 1066 | security_blob = smb2_get_data_area_len(&blob_offset, &blob_length, |
0d35e382 | 1067 | (struct smb2_hdr *)rsp); |
5d875cc9 SF |
1068 | /* |
1069 | * See MS-SMB2 section 2.2.4: if no blob, client picks default which | |
1070 | * for us will be | |
1071 | * ses->sectype = RawNTLMSSP; | |
1072 | * but for time being this is our only auth choice so doesn't matter. | |
1073 | * We just found a server which sets blob length to zero expecting raw. | |
1074 | */ | |
67dbea2c | 1075 | if (blob_length == 0) { |
5d875cc9 | 1076 | cifs_dbg(FYI, "missing security blob on negprot\n"); |
67dbea2c PS |
1077 | server->sec_ntlmssp = true; |
1078 | } | |
3c1bf7e4 | 1079 | |
38d77c50 | 1080 | rc = cifs_enable_signing(server, ses->sign); |
9ddec561 JL |
1081 | if (rc) |
1082 | goto neg_exit; | |
ceb1b0b9 | 1083 | if (blob_length) { |
ebdd207e | 1084 | rc = decode_negTokenInit(security_blob, blob_length, server); |
ceb1b0b9 SF |
1085 | if (rc == 1) |
1086 | rc = 0; | |
1087 | else if (rc == 0) | |
1088 | rc = -EIO; | |
ec2e4523 | 1089 | } |
5100d8a3 | 1090 | |
5100d8a3 SF |
1091 | if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID)) { |
1092 | if (rsp->NegotiateContextCount) | |
977b6170 RS |
1093 | rc = smb311_decode_neg_context(rsp, server, |
1094 | rsp_iov.iov_len); | |
5100d8a3 | 1095 | else |
afe6f653 | 1096 | cifs_server_dbg(VFS, "Missing expected negotiate contexts\n"); |
5100d8a3 | 1097 | } |
ec2e4523 PS |
1098 | neg_exit: |
1099 | free_rsp_buf(resp_buftype, rsp); | |
1100 | return rc; | |
1101 | } | |
5478f9ba | 1102 | |
ff1c038a SF |
1103 | int smb3_validate_negotiate(const unsigned int xid, struct cifs_tcon *tcon) |
1104 | { | |
2796d303 LL |
1105 | int rc; |
1106 | struct validate_negotiate_info_req *pneg_inbuf; | |
fe83bebc | 1107 | struct validate_negotiate_info_rsp *pneg_rsp = NULL; |
ff1c038a | 1108 | u32 rsplen; |
9764c02f | 1109 | u32 inbuflen; /* max of 4 dialects */ |
afe6f653 | 1110 | struct TCP_Server_Info *server = tcon->ses->server; |
ff1c038a SF |
1111 | |
1112 | cifs_dbg(FYI, "validate negotiate\n"); | |
1113 | ||
8bd68c6e | 1114 | /* In SMB3.11 preauth integrity supersedes validate negotiate */ |
afe6f653 | 1115 | if (server->dialect == SMB311_PROT_ID) |
8bd68c6e AA |
1116 | return 0; |
1117 | ||
ff1c038a SF |
1118 | /* |
1119 | * validation ioctl must be signed, so no point sending this if we | |
0603c96f SF |
1120 | * can not sign it (ie are not known user). Even if signing is not |
1121 | * required (enabled but not negotiated), in those cases we selectively | |
ff1c038a | 1122 | * sign just this, the first and only signed request on a connection. |
0603c96f | 1123 | * Having validation of negotiate info helps reduce attack vectors. |
ff1c038a | 1124 | */ |
0603c96f | 1125 | if (tcon->ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST) |
ff1c038a SF |
1126 | return 0; /* validation requires signing */ |
1127 | ||
0603c96f SF |
1128 | if (tcon->ses->user_name == NULL) { |
1129 | cifs_dbg(FYI, "Can't validate negotiate: null user mount\n"); | |
1130 | return 0; /* validation requires signing */ | |
1131 | } | |
1132 | ||
1133 | if (tcon->ses->session_flags & SMB2_SESSION_FLAG_IS_NULL) | |
3175eb9b | 1134 | cifs_tcon_dbg(VFS, "Unexpected null user (anonymous) auth flag sent by server\n"); |
0603c96f | 1135 | |
2796d303 LL |
1136 | pneg_inbuf = kmalloc(sizeof(*pneg_inbuf), GFP_NOFS); |
1137 | if (!pneg_inbuf) | |
1138 | return -ENOMEM; | |
1139 | ||
1140 | pneg_inbuf->Capabilities = | |
afe6f653 | 1141 | cpu_to_le32(server->vals->req_capabilities); |
679971e7 SF |
1142 | if (tcon->ses->chan_max > 1) |
1143 | pneg_inbuf->Capabilities |= cpu_to_le32(SMB2_GLOBAL_CAP_MULTI_CHANNEL); | |
1144 | ||
afe6f653 | 1145 | memcpy(pneg_inbuf->Guid, server->client_guid, |
39552ea8 | 1146 | SMB2_CLIENT_GUID_SIZE); |
ff1c038a SF |
1147 | |
1148 | if (tcon->ses->sign) | |
2796d303 | 1149 | pneg_inbuf->SecurityMode = |
ff1c038a SF |
1150 | cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED); |
1151 | else if (global_secflags & CIFSSEC_MAY_SIGN) | |
2796d303 | 1152 | pneg_inbuf->SecurityMode = |
ff1c038a SF |
1153 | cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED); |
1154 | else | |
2796d303 | 1155 | pneg_inbuf->SecurityMode = 0; |
ff1c038a | 1156 | |
9764c02f | 1157 | |
afe6f653 | 1158 | if (strcmp(server->vals->version_string, |
9764c02f | 1159 | SMB3ANY_VERSION_STRING) == 0) { |
2796d303 LL |
1160 | pneg_inbuf->Dialects[0] = cpu_to_le16(SMB30_PROT_ID); |
1161 | pneg_inbuf->Dialects[1] = cpu_to_le16(SMB302_PROT_ID); | |
6dffa4c2 SF |
1162 | pneg_inbuf->Dialects[2] = cpu_to_le16(SMB311_PROT_ID); |
1163 | pneg_inbuf->DialectCount = cpu_to_le16(3); | |
1164 | /* SMB 2.1 not included so subtract one dialect from len */ | |
2796d303 | 1165 | inbuflen = sizeof(*pneg_inbuf) - |
6dffa4c2 | 1166 | (sizeof(pneg_inbuf->Dialects[0])); |
afe6f653 | 1167 | } else if (strcmp(server->vals->version_string, |
9764c02f | 1168 | SMBDEFAULT_VERSION_STRING) == 0) { |
2796d303 LL |
1169 | pneg_inbuf->Dialects[0] = cpu_to_le16(SMB21_PROT_ID); |
1170 | pneg_inbuf->Dialects[1] = cpu_to_le16(SMB30_PROT_ID); | |
1171 | pneg_inbuf->Dialects[2] = cpu_to_le16(SMB302_PROT_ID); | |
d5c7076b SF |
1172 | pneg_inbuf->Dialects[3] = cpu_to_le16(SMB311_PROT_ID); |
1173 | pneg_inbuf->DialectCount = cpu_to_le16(4); | |
6dffa4c2 | 1174 | /* structure is big enough for 4 dialects */ |
2796d303 | 1175 | inbuflen = sizeof(*pneg_inbuf); |
9764c02f SF |
1176 | } else { |
1177 | /* otherwise specific dialect was requested */ | |
2796d303 | 1178 | pneg_inbuf->Dialects[0] = |
afe6f653 | 1179 | cpu_to_le16(server->vals->protocol_id); |
2796d303 | 1180 | pneg_inbuf->DialectCount = cpu_to_le16(1); |
e98ecc6e | 1181 | /* structure is big enough for 4 dialects, sending only 1 */ |
2796d303 | 1182 | inbuflen = sizeof(*pneg_inbuf) - |
e98ecc6e | 1183 | sizeof(pneg_inbuf->Dialects[0]) * 3; |
9764c02f | 1184 | } |
ff1c038a SF |
1185 | |
1186 | rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID, | |
400d0ad6 | 1187 | FSCTL_VALIDATE_NEGOTIATE_INFO, |
153322f7 SF |
1188 | (char *)pneg_inbuf, inbuflen, CIFSMaxBufSize, |
1189 | (char **)&pneg_rsp, &rsplen); | |
969ae8e8 NJ |
1190 | if (rc == -EOPNOTSUPP) { |
1191 | /* | |
1192 | * Old Windows versions or Netapp SMB server can return | |
1193 | * not supported error. Client should accept it. | |
1194 | */ | |
3175eb9b | 1195 | cifs_tcon_dbg(VFS, "Server does not support validate negotiate\n"); |
21078203 CIK |
1196 | rc = 0; |
1197 | goto out_free_inbuf; | |
969ae8e8 | 1198 | } else if (rc != 0) { |
a0a3036b JP |
1199 | cifs_tcon_dbg(VFS, "validate protocol negotiate failed: %d\n", |
1200 | rc); | |
2796d303 LL |
1201 | rc = -EIO; |
1202 | goto out_free_inbuf; | |
ff1c038a SF |
1203 | } |
1204 | ||
2796d303 LL |
1205 | rc = -EIO; |
1206 | if (rsplen != sizeof(*pneg_rsp)) { | |
a0a3036b JP |
1207 | cifs_tcon_dbg(VFS, "Invalid protocol negotiate response size: %d\n", |
1208 | rsplen); | |
7db0a6ef SF |
1209 | |
1210 | /* relax check since Mac returns max bufsize allowed on ioctl */ | |
2796d303 LL |
1211 | if (rsplen > CIFSMaxBufSize || rsplen < sizeof(*pneg_rsp)) |
1212 | goto out_free_rsp; | |
ff1c038a SF |
1213 | } |
1214 | ||
1215 | /* check validate negotiate info response matches what we got earlier */ | |
afe6f653 | 1216 | if (pneg_rsp->Dialect != cpu_to_le16(server->dialect)) |
ff1c038a SF |
1217 | goto vneg_out; |
1218 | ||
afe6f653 | 1219 | if (pneg_rsp->SecurityMode != cpu_to_le16(server->sec_mode)) |
ff1c038a SF |
1220 | goto vneg_out; |
1221 | ||
1222 | /* do not validate server guid because not saved at negprot time yet */ | |
1223 | ||
1224 | if ((le32_to_cpu(pneg_rsp->Capabilities) | SMB2_NT_FIND | | |
afe6f653 | 1225 | SMB2_LARGE_FILES) != server->capabilities) |
ff1c038a SF |
1226 | goto vneg_out; |
1227 | ||
1228 | /* validate negotiate successful */ | |
2796d303 | 1229 | rc = 0; |
ff1c038a | 1230 | cifs_dbg(FYI, "validate negotiate info successful\n"); |
2796d303 | 1231 | goto out_free_rsp; |
ff1c038a SF |
1232 | |
1233 | vneg_out: | |
3175eb9b | 1234 | cifs_tcon_dbg(VFS, "protocol revalidation - security settings mismatch\n"); |
2796d303 | 1235 | out_free_rsp: |
fe83bebc | 1236 | kfree(pneg_rsp); |
2796d303 LL |
1237 | out_free_inbuf: |
1238 | kfree(pneg_inbuf); | |
1239 | return rc; | |
ff1c038a SF |
1240 | } |
1241 | ||
ef65aaed SP |
1242 | enum securityEnum |
1243 | smb2_select_sectype(struct TCP_Server_Info *server, enum securityEnum requested) | |
1244 | { | |
1245 | switch (requested) { | |
1246 | case Kerberos: | |
1247 | case RawNTLMSSP: | |
1248 | return requested; | |
1249 | case NTLMv2: | |
1250 | return RawNTLMSSP; | |
1251 | case Unspecified: | |
1252 | if (server->sec_ntlmssp && | |
1253 | (global_secflags & CIFSSEC_MAY_NTLMSSP)) | |
1254 | return RawNTLMSSP; | |
1255 | if ((server->sec_kerberos || server->sec_mskerberos) && | |
1256 | (global_secflags & CIFSSEC_MAY_KRB5)) | |
1257 | return Kerberos; | |
df561f66 | 1258 | fallthrough; |
ef65aaed SP |
1259 | default: |
1260 | return Unspecified; | |
1261 | } | |
1262 | } | |
1263 | ||
3baf1a7b SP |
1264 | struct SMB2_sess_data { |
1265 | unsigned int xid; | |
1266 | struct cifs_ses *ses; | |
f486ef8e | 1267 | struct TCP_Server_Info *server; |
3baf1a7b SP |
1268 | struct nls_table *nls_cp; |
1269 | void (*func)(struct SMB2_sess_data *); | |
1270 | int result; | |
1271 | u64 previous_session; | |
1272 | ||
1273 | /* we will send the SMB in three pieces: | |
1274 | * a fixed length beginning part, an optional | |
1275 | * SPNEGO blob (which can be zero length), and a | |
1276 | * last part which will include the strings | |
1277 | * and rest of bcc area. This allows us to avoid | |
1278 | * a large buffer 17K allocation | |
1279 | */ | |
1280 | int buf0_type; | |
1281 | struct kvec iov[2]; | |
1282 | }; | |
1283 | ||
1284 | static int | |
1285 | SMB2_sess_alloc_buffer(struct SMB2_sess_data *sess_data) | |
1286 | { | |
1287 | int rc; | |
1288 | struct cifs_ses *ses = sess_data->ses; | |
f486ef8e | 1289 | struct TCP_Server_Info *server = sess_data->server; |
3baf1a7b | 1290 | struct smb2_sess_setup_req *req; |
88ea5cb7 | 1291 | unsigned int total_len; |
f486ef8e | 1292 | bool is_binding = false; |
3baf1a7b | 1293 | |
352d96f3 AA |
1294 | rc = smb2_plain_req_init(SMB2_SESSION_SETUP, NULL, server, |
1295 | (void **) &req, | |
1296 | &total_len); | |
3baf1a7b SP |
1297 | if (rc) |
1298 | return rc; | |
1299 | ||
bc962159 SP |
1300 | spin_lock(&ses->ses_lock); |
1301 | is_binding = (ses->ses_status == SES_GOOD); | |
1302 | spin_unlock(&ses->ses_lock); | |
f486ef8e SP |
1303 | |
1304 | if (is_binding) { | |
1305 | req->hdr.SessionId = cpu_to_le64(ses->Suid); | |
0d35e382 | 1306 | req->hdr.Flags |= SMB2_FLAGS_SIGNED; |
d70e9fa5 AA |
1307 | req->PreviousSessionId = 0; |
1308 | req->Flags = SMB2_SESSION_REQ_FLAG_BINDING; | |
f486ef8e | 1309 | cifs_dbg(FYI, "Binding to sess id: %llx\n", ses->Suid); |
d70e9fa5 AA |
1310 | } else { |
1311 | /* First session, not a reauthenticate */ | |
0d35e382 | 1312 | req->hdr.SessionId = 0; |
d70e9fa5 AA |
1313 | /* |
1314 | * if reconnect, we need to send previous sess id | |
1315 | * otherwise it is 0 | |
1316 | */ | |
d8d9de53 | 1317 | req->PreviousSessionId = cpu_to_le64(sess_data->previous_session); |
d70e9fa5 | 1318 | req->Flags = 0; /* MBZ */ |
f486ef8e SP |
1319 | cifs_dbg(FYI, "Fresh session. Previous: %llx\n", |
1320 | sess_data->previous_session); | |
d70e9fa5 | 1321 | } |
d409014e SF |
1322 | |
1323 | /* enough to enable echos and oplocks and one max size write */ | |
5e90aa21 SP |
1324 | if (server->credits >= server->max_credits) |
1325 | req->hdr.CreditRequest = cpu_to_le16(0); | |
1326 | else | |
1327 | req->hdr.CreditRequest = cpu_to_le16( | |
1328 | min_t(int, server->max_credits - | |
1329 | server->credits, 130)); | |
3baf1a7b SP |
1330 | |
1331 | /* only one of SMB2 signing flags may be set in SMB2 request */ | |
1332 | if (server->sign) | |
1333 | req->SecurityMode = SMB2_NEGOTIATE_SIGNING_REQUIRED; | |
1334 | else if (global_secflags & CIFSSEC_MAY_SIGN) /* one flag unlike MUST_ */ | |
1335 | req->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED; | |
1336 | else | |
1337 | req->SecurityMode = 0; | |
1338 | ||
8d33096a SF |
1339 | #ifdef CONFIG_CIFS_DFS_UPCALL |
1340 | req->Capabilities = cpu_to_le32(SMB2_GLOBAL_CAP_DFS); | |
1341 | #else | |
3baf1a7b | 1342 | req->Capabilities = 0; |
8d33096a SF |
1343 | #endif /* DFS_UPCALL */ |
1344 | ||
3baf1a7b SP |
1345 | req->Channel = 0; /* MBZ */ |
1346 | ||
1347 | sess_data->iov[0].iov_base = (char *)req; | |
88ea5cb7 RS |
1348 | /* 1 for pad */ |
1349 | sess_data->iov[0].iov_len = total_len - 1; | |
3baf1a7b SP |
1350 | /* |
1351 | * This variable will be used to clear the buffer | |
1352 | * allocated above in case of any error in the calling function. | |
1353 | */ | |
1354 | sess_data->buf0_type = CIFS_SMALL_BUFFER; | |
1355 | ||
1356 | return 0; | |
1357 | } | |
1358 | ||
1359 | static void | |
1360 | SMB2_sess_free_buffer(struct SMB2_sess_data *sess_data) | |
1361 | { | |
01f2ee7e | 1362 | struct kvec *iov = sess_data->iov; |
a4e430c8 | 1363 | |
01f2ee7e PA |
1364 | /* iov[1] is already freed by caller */ |
1365 | if (sess_data->buf0_type != CIFS_NO_BUFFER && iov[0].iov_base) | |
1366 | memzero_explicit(iov[0].iov_base, iov[0].iov_len); | |
a4e430c8 | 1367 | |
01f2ee7e | 1368 | free_rsp_buf(sess_data->buf0_type, iov[0].iov_base); |
3baf1a7b SP |
1369 | sess_data->buf0_type = CIFS_NO_BUFFER; |
1370 | } | |
1371 | ||
1372 | static int | |
1373 | SMB2_sess_sendreceive(struct SMB2_sess_data *sess_data) | |
1374 | { | |
1375 | int rc; | |
40eff45b | 1376 | struct smb_rqst rqst; |
3baf1a7b | 1377 | struct smb2_sess_setup_req *req = sess_data->iov[0].iov_base; |
da502f7d | 1378 | struct kvec rsp_iov = { NULL, 0 }; |
3baf1a7b SP |
1379 | |
1380 | /* Testing shows that buffer offset must be at location of Buffer[0] */ | |
1381 | req->SecurityBufferOffset = | |
eb3e28c1 | 1382 | cpu_to_le16(sizeof(struct smb2_sess_setup_req)); |
3baf1a7b SP |
1383 | req->SecurityBufferLength = cpu_to_le16(sess_data->iov[1].iov_len); |
1384 | ||
40eff45b RS |
1385 | memset(&rqst, 0, sizeof(struct smb_rqst)); |
1386 | rqst.rq_iov = sess_data->iov; | |
1387 | rqst.rq_nvec = 2; | |
3baf1a7b | 1388 | |
40eff45b RS |
1389 | /* BB add code to build os and lm fields */ |
1390 | rc = cifs_send_recv(sess_data->xid, sess_data->ses, | |
f486ef8e | 1391 | sess_data->server, |
40eff45b | 1392 | &rqst, |
88ea5cb7 | 1393 | &sess_data->buf0_type, |
0f56db83 | 1394 | CIFS_LOG_ERROR | CIFS_SESS_OP, &rsp_iov); |
da502f7d PS |
1395 | cifs_small_buf_release(sess_data->iov[0].iov_base); |
1396 | memcpy(&sess_data->iov[0], &rsp_iov, sizeof(struct kvec)); | |
3baf1a7b SP |
1397 | |
1398 | return rc; | |
1399 | } | |
1400 | ||
1401 | static int | |
1402 | SMB2_sess_establish_session(struct SMB2_sess_data *sess_data) | |
1403 | { | |
1404 | int rc = 0; | |
1405 | struct cifs_ses *ses = sess_data->ses; | |
f486ef8e | 1406 | struct TCP_Server_Info *server = sess_data->server; |
3baf1a7b | 1407 | |
cc391b69 | 1408 | cifs_server_lock(server); |
f6a6bf7c | 1409 | if (server->ops->generate_signingkey) { |
f486ef8e | 1410 | rc = server->ops->generate_signingkey(ses, server); |
3baf1a7b SP |
1411 | if (rc) { |
1412 | cifs_dbg(FYI, | |
1413 | "SMB3 session key generation failed\n"); | |
cc391b69 | 1414 | cifs_server_unlock(server); |
cabfb368 | 1415 | return rc; |
3baf1a7b SP |
1416 | } |
1417 | } | |
f6a6bf7c AA |
1418 | if (!server->session_estab) { |
1419 | server->sequence_number = 0x2; | |
1420 | server->session_estab = true; | |
3baf1a7b | 1421 | } |
cc391b69 | 1422 | cifs_server_unlock(server); |
3baf1a7b SP |
1423 | |
1424 | cifs_dbg(FYI, "SMB2/3 session established successfully\n"); | |
3baf1a7b SP |
1425 | return rc; |
1426 | } | |
1427 | ||
1428 | #ifdef CONFIG_CIFS_UPCALL | |
1429 | static void | |
1430 | SMB2_auth_kerberos(struct SMB2_sess_data *sess_data) | |
1431 | { | |
1432 | int rc; | |
1433 | struct cifs_ses *ses = sess_data->ses; | |
f486ef8e | 1434 | struct TCP_Server_Info *server = sess_data->server; |
3baf1a7b SP |
1435 | struct cifs_spnego_msg *msg; |
1436 | struct key *spnego_key = NULL; | |
1437 | struct smb2_sess_setup_rsp *rsp = NULL; | |
f486ef8e | 1438 | bool is_binding = false; |
3baf1a7b SP |
1439 | |
1440 | rc = SMB2_sess_alloc_buffer(sess_data); | |
1441 | if (rc) | |
1442 | goto out; | |
1443 | ||
f486ef8e | 1444 | spnego_key = cifs_get_spnego_key(ses, server); |
3baf1a7b SP |
1445 | if (IS_ERR(spnego_key)) { |
1446 | rc = PTR_ERR(spnego_key); | |
0a018944 SF |
1447 | if (rc == -ENOKEY) |
1448 | cifs_dbg(VFS, "Verify user has a krb5 ticket and keyutils is installed\n"); | |
3baf1a7b SP |
1449 | spnego_key = NULL; |
1450 | goto out; | |
1451 | } | |
1452 | ||
1453 | msg = spnego_key->payload.data[0]; | |
1454 | /* | |
1455 | * check version field to make sure that cifs.upcall is | |
1456 | * sending us a response in an expected form | |
1457 | */ | |
1458 | if (msg->version != CIFS_SPNEGO_UPCALL_VERSION) { | |
a0a3036b JP |
1459 | cifs_dbg(VFS, "bad cifs.upcall version. Expected %d got %d\n", |
1460 | CIFS_SPNEGO_UPCALL_VERSION, msg->version); | |
3baf1a7b SP |
1461 | rc = -EKEYREJECTED; |
1462 | goto out_put_spnego_key; | |
1463 | } | |
1464 | ||
bc962159 SP |
1465 | spin_lock(&ses->ses_lock); |
1466 | is_binding = (ses->ses_status == SES_GOOD); | |
1467 | spin_unlock(&ses->ses_lock); | |
f486ef8e | 1468 | |
d70e9fa5 | 1469 | /* keep session key if binding */ |
f486ef8e | 1470 | if (!is_binding) { |
2fe58d97 | 1471 | kfree_sensitive(ses->auth_key.response); |
d70e9fa5 AA |
1472 | ses->auth_key.response = kmemdup(msg->data, msg->sesskey_len, |
1473 | GFP_KERNEL); | |
1474 | if (!ses->auth_key.response) { | |
a0a3036b | 1475 | cifs_dbg(VFS, "Kerberos can't allocate (%u bytes) memory\n", |
d70e9fa5 AA |
1476 | msg->sesskey_len); |
1477 | rc = -ENOMEM; | |
1478 | goto out_put_spnego_key; | |
1479 | } | |
1480 | ses->auth_key.len = msg->sesskey_len; | |
3baf1a7b | 1481 | } |
3baf1a7b SP |
1482 | |
1483 | sess_data->iov[1].iov_base = msg->data + msg->sesskey_len; | |
1484 | sess_data->iov[1].iov_len = msg->secblob_len; | |
1485 | ||
1486 | rc = SMB2_sess_sendreceive(sess_data); | |
1487 | if (rc) | |
1488 | goto out_put_spnego_key; | |
1489 | ||
1490 | rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base; | |
d70e9fa5 | 1491 | /* keep session id and flags if binding */ |
f486ef8e | 1492 | if (!is_binding) { |
0d35e382 | 1493 | ses->Suid = le64_to_cpu(rsp->hdr.SessionId); |
d70e9fa5 AA |
1494 | ses->session_flags = le16_to_cpu(rsp->SessionFlags); |
1495 | } | |
3baf1a7b SP |
1496 | |
1497 | rc = SMB2_sess_establish_session(sess_data); | |
1498 | out_put_spnego_key: | |
1499 | key_invalidate(spnego_key); | |
1500 | key_put(spnego_key); | |
39e8db3c | 1501 | if (rc) { |
a4e430c8 | 1502 | kfree_sensitive(ses->auth_key.response); |
39e8db3c PA |
1503 | ses->auth_key.response = NULL; |
1504 | ses->auth_key.len = 0; | |
1505 | } | |
3baf1a7b SP |
1506 | out: |
1507 | sess_data->result = rc; | |
1508 | sess_data->func = NULL; | |
1509 | SMB2_sess_free_buffer(sess_data); | |
1510 | } | |
1511 | #else | |
1512 | static void | |
1513 | SMB2_auth_kerberos(struct SMB2_sess_data *sess_data) | |
1514 | { | |
1515 | cifs_dbg(VFS, "Kerberos negotiated but upcall support disabled!\n"); | |
1516 | sess_data->result = -EOPNOTSUPP; | |
1517 | sess_data->func = NULL; | |
1518 | } | |
1519 | #endif | |
1520 | ||
166cea4d SP |
1521 | static void |
1522 | SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data *sess_data); | |
1523 | ||
1524 | static void | |
1525 | SMB2_sess_auth_rawntlmssp_negotiate(struct SMB2_sess_data *sess_data) | |
5478f9ba | 1526 | { |
166cea4d SP |
1527 | int rc; |
1528 | struct cifs_ses *ses = sess_data->ses; | |
f486ef8e | 1529 | struct TCP_Server_Info *server = sess_data->server; |
5478f9ba | 1530 | struct smb2_sess_setup_rsp *rsp = NULL; |
49bd49f9 | 1531 | unsigned char *ntlmssp_blob = NULL; |
5478f9ba | 1532 | bool use_spnego = false; /* else use raw ntlmssp */ |
166cea4d | 1533 | u16 blob_length = 0; |
f486ef8e | 1534 | bool is_binding = false; |
d4e63bd6 | 1535 | |
5478f9ba PS |
1536 | /* |
1537 | * If memory allocation is successful, caller of this function | |
1538 | * frees it. | |
1539 | */ | |
1540 | ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL); | |
166cea4d SP |
1541 | if (!ses->ntlmssp) { |
1542 | rc = -ENOMEM; | |
1543 | goto out_err; | |
1544 | } | |
5c234aa5 | 1545 | ses->ntlmssp->sesskey_per_smbsess = true; |
5478f9ba | 1546 | |
166cea4d | 1547 | rc = SMB2_sess_alloc_buffer(sess_data); |
5478f9ba | 1548 | if (rc) |
166cea4d | 1549 | goto out_err; |
5478f9ba | 1550 | |
52d00533 | 1551 | rc = build_ntlmssp_smb3_negotiate_blob(&ntlmssp_blob, |
f486ef8e | 1552 | &blob_length, ses, server, |
49bd49f9 SP |
1553 | sess_data->nls_cp); |
1554 | if (rc) | |
30b2d7f8 | 1555 | goto out; |
c2afb814 | 1556 | |
166cea4d SP |
1557 | if (use_spnego) { |
1558 | /* BB eventually need to add this */ | |
1559 | cifs_dbg(VFS, "spnego not supported for SMB2 yet\n"); | |
1560 | rc = -EOPNOTSUPP; | |
1561 | goto out; | |
166cea4d SP |
1562 | } |
1563 | sess_data->iov[1].iov_base = ntlmssp_blob; | |
1564 | sess_data->iov[1].iov_len = blob_length; | |
c2afb814 | 1565 | |
166cea4d SP |
1566 | rc = SMB2_sess_sendreceive(sess_data); |
1567 | rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base; | |
5478f9ba | 1568 | |
166cea4d SP |
1569 | /* If true, rc here is expected and not an error */ |
1570 | if (sess_data->buf0_type != CIFS_NO_BUFFER && | |
0d35e382 | 1571 | rsp->hdr.Status == STATUS_MORE_PROCESSING_REQUIRED) |
166cea4d | 1572 | rc = 0; |
38d77c50 | 1573 | |
166cea4d SP |
1574 | if (rc) |
1575 | goto out; | |
5478f9ba | 1576 | |
1fc6ad2f | 1577 | if (offsetof(struct smb2_sess_setup_rsp, Buffer) != |
166cea4d SP |
1578 | le16_to_cpu(rsp->SecurityBufferOffset)) { |
1579 | cifs_dbg(VFS, "Invalid security buffer offset %d\n", | |
1580 | le16_to_cpu(rsp->SecurityBufferOffset)); | |
5478f9ba | 1581 | rc = -EIO; |
166cea4d | 1582 | goto out; |
5478f9ba | 1583 | } |
166cea4d SP |
1584 | rc = decode_ntlmssp_challenge(rsp->Buffer, |
1585 | le16_to_cpu(rsp->SecurityBufferLength), ses); | |
1586 | if (rc) | |
1587 | goto out; | |
5478f9ba | 1588 | |
166cea4d | 1589 | cifs_dbg(FYI, "rawntlmssp session setup challenge phase\n"); |
5478f9ba | 1590 | |
bc962159 SP |
1591 | spin_lock(&ses->ses_lock); |
1592 | is_binding = (ses->ses_status == SES_GOOD); | |
1593 | spin_unlock(&ses->ses_lock); | |
f486ef8e | 1594 | |
d70e9fa5 | 1595 | /* keep existing ses id and flags if binding */ |
f486ef8e | 1596 | if (!is_binding) { |
0d35e382 | 1597 | ses->Suid = le64_to_cpu(rsp->hdr.SessionId); |
d70e9fa5 AA |
1598 | ses->session_flags = le16_to_cpu(rsp->SessionFlags); |
1599 | } | |
166cea4d SP |
1600 | |
1601 | out: | |
01f2ee7e | 1602 | kfree_sensitive(ntlmssp_blob); |
166cea4d SP |
1603 | SMB2_sess_free_buffer(sess_data); |
1604 | if (!rc) { | |
1605 | sess_data->result = 0; | |
1606 | sess_data->func = SMB2_sess_auth_rawntlmssp_authenticate; | |
1607 | return; | |
1608 | } | |
1609 | out_err: | |
a4e430c8 | 1610 | kfree_sensitive(ses->ntlmssp); |
166cea4d SP |
1611 | ses->ntlmssp = NULL; |
1612 | sess_data->result = rc; | |
1613 | sess_data->func = NULL; | |
1614 | } | |
5478f9ba | 1615 | |
166cea4d SP |
1616 | static void |
1617 | SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data *sess_data) | |
1618 | { | |
1619 | int rc; | |
1620 | struct cifs_ses *ses = sess_data->ses; | |
f486ef8e | 1621 | struct TCP_Server_Info *server = sess_data->server; |
166cea4d SP |
1622 | struct smb2_sess_setup_req *req; |
1623 | struct smb2_sess_setup_rsp *rsp = NULL; | |
1624 | unsigned char *ntlmssp_blob = NULL; | |
1625 | bool use_spnego = false; /* else use raw ntlmssp */ | |
1626 | u16 blob_length = 0; | |
f486ef8e | 1627 | bool is_binding = false; |
5478f9ba | 1628 | |
166cea4d SP |
1629 | rc = SMB2_sess_alloc_buffer(sess_data); |
1630 | if (rc) | |
1631 | goto out; | |
5478f9ba | 1632 | |
166cea4d | 1633 | req = (struct smb2_sess_setup_req *) sess_data->iov[0].iov_base; |
0d35e382 | 1634 | req->hdr.SessionId = cpu_to_le64(ses->Suid); |
166cea4d | 1635 | |
f486ef8e SP |
1636 | rc = build_ntlmssp_auth_blob(&ntlmssp_blob, &blob_length, |
1637 | ses, server, | |
1638 | sess_data->nls_cp); | |
166cea4d SP |
1639 | if (rc) { |
1640 | cifs_dbg(FYI, "build_ntlmssp_auth_blob failed %d\n", rc); | |
1641 | goto out; | |
5478f9ba PS |
1642 | } |
1643 | ||
166cea4d SP |
1644 | if (use_spnego) { |
1645 | /* BB eventually need to add this */ | |
1646 | cifs_dbg(VFS, "spnego not supported for SMB2 yet\n"); | |
1647 | rc = -EOPNOTSUPP; | |
1648 | goto out; | |
1649 | } | |
1650 | sess_data->iov[1].iov_base = ntlmssp_blob; | |
1651 | sess_data->iov[1].iov_len = blob_length; | |
5478f9ba | 1652 | |
166cea4d SP |
1653 | rc = SMB2_sess_sendreceive(sess_data); |
1654 | if (rc) | |
1655 | goto out; | |
1656 | ||
1657 | rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base; | |
1658 | ||
bc962159 SP |
1659 | spin_lock(&ses->ses_lock); |
1660 | is_binding = (ses->ses_status == SES_GOOD); | |
1661 | spin_unlock(&ses->ses_lock); | |
f486ef8e | 1662 | |
d70e9fa5 | 1663 | /* keep existing ses id and flags if binding */ |
f486ef8e | 1664 | if (!is_binding) { |
0d35e382 | 1665 | ses->Suid = le64_to_cpu(rsp->hdr.SessionId); |
d70e9fa5 AA |
1666 | ses->session_flags = le16_to_cpu(rsp->SessionFlags); |
1667 | } | |
5478f9ba | 1668 | |
166cea4d | 1669 | rc = SMB2_sess_establish_session(sess_data); |
f560cda9 RS |
1670 | #ifdef CONFIG_CIFS_DEBUG_DUMP_KEYS |
1671 | if (ses->server->dialect < SMB30_PROT_ID) { | |
1672 | cifs_dbg(VFS, "%s: dumping generated SMB2 session keys\n", __func__); | |
1673 | /* | |
1674 | * The session id is opaque in terms of endianness, so we can't | |
1675 | * print it as a long long. we dump it as we got it on the wire | |
1676 | */ | |
1677 | cifs_dbg(VFS, "Session Id %*ph\n", (int)sizeof(ses->Suid), | |
1678 | &ses->Suid); | |
1679 | cifs_dbg(VFS, "Session Key %*ph\n", | |
1680 | SMB2_NTLMV2_SESSKEY_SIZE, ses->auth_key.response); | |
1681 | cifs_dbg(VFS, "Signing Key %*ph\n", | |
1682 | SMB3_SIGN_KEY_SIZE, ses->auth_key.response); | |
1683 | } | |
1684 | #endif | |
166cea4d | 1685 | out: |
01f2ee7e | 1686 | kfree_sensitive(ntlmssp_blob); |
166cea4d | 1687 | SMB2_sess_free_buffer(sess_data); |
a4e430c8 | 1688 | kfree_sensitive(ses->ntlmssp); |
166cea4d SP |
1689 | ses->ntlmssp = NULL; |
1690 | sess_data->result = rc; | |
1691 | sess_data->func = NULL; | |
1692 | } | |
d4e63bd6 | 1693 | |
166cea4d | 1694 | static int |
f486ef8e | 1695 | SMB2_select_sec(struct SMB2_sess_data *sess_data) |
166cea4d | 1696 | { |
ef65aaed | 1697 | int type; |
f486ef8e SP |
1698 | struct cifs_ses *ses = sess_data->ses; |
1699 | struct TCP_Server_Info *server = sess_data->server; | |
ef65aaed | 1700 | |
f486ef8e | 1701 | type = smb2_select_sectype(server, ses->sectype); |
ef65aaed SP |
1702 | cifs_dbg(FYI, "sess setup type %d\n", type); |
1703 | if (type == Unspecified) { | |
a0a3036b | 1704 | cifs_dbg(VFS, "Unable to select appropriate authentication method!\n"); |
ef65aaed SP |
1705 | return -EINVAL; |
1706 | } | |
d4e63bd6 | 1707 | |
ef65aaed | 1708 | switch (type) { |
166cea4d SP |
1709 | case Kerberos: |
1710 | sess_data->func = SMB2_auth_kerberos; | |
1711 | break; | |
1712 | case RawNTLMSSP: | |
1713 | sess_data->func = SMB2_sess_auth_rawntlmssp_negotiate; | |
1714 | break; | |
1715 | default: | |
ef65aaed | 1716 | cifs_dbg(VFS, "secType %d not supported!\n", type); |
166cea4d | 1717 | return -EOPNOTSUPP; |
d4e63bd6 SP |
1718 | } |
1719 | ||
166cea4d SP |
1720 | return 0; |
1721 | } | |
1722 | ||
1723 | int | |
1724 | SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses, | |
f486ef8e | 1725 | struct TCP_Server_Info *server, |
166cea4d SP |
1726 | const struct nls_table *nls_cp) |
1727 | { | |
1728 | int rc = 0; | |
166cea4d SP |
1729 | struct SMB2_sess_data *sess_data; |
1730 | ||
1731 | cifs_dbg(FYI, "Session Setup\n"); | |
1732 | ||
1733 | if (!server) { | |
1734 | WARN(1, "%s: server is NULL!\n", __func__); | |
1735 | return -EIO; | |
d4e63bd6 | 1736 | } |
d4e63bd6 | 1737 | |
166cea4d SP |
1738 | sess_data = kzalloc(sizeof(struct SMB2_sess_data), GFP_KERNEL); |
1739 | if (!sess_data) | |
1740 | return -ENOMEM; | |
1741 | ||
166cea4d SP |
1742 | sess_data->xid = xid; |
1743 | sess_data->ses = ses; | |
f486ef8e | 1744 | sess_data->server = server; |
166cea4d SP |
1745 | sess_data->buf0_type = CIFS_NO_BUFFER; |
1746 | sess_data->nls_cp = (struct nls_table *) nls_cp; | |
b2adf22f | 1747 | sess_data->previous_session = ses->Suid; |
166cea4d | 1748 | |
f486ef8e SP |
1749 | rc = SMB2_select_sec(sess_data); |
1750 | if (rc) | |
1751 | goto out; | |
1752 | ||
8bd68c6e AA |
1753 | /* |
1754 | * Initialize the session hash with the server one. | |
1755 | */ | |
f6a6bf7c | 1756 | memcpy(ses->preauth_sha_hash, server->preauth_sha_hash, |
8bd68c6e | 1757 | SMB2_PREAUTH_HASH_SIZE); |
8bd68c6e | 1758 | |
166cea4d SP |
1759 | while (sess_data->func) |
1760 | sess_data->func(sess_data); | |
1761 | ||
c721c389 | 1762 | if ((ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST) && (ses->sign)) |
afe6f653 | 1763 | cifs_server_dbg(VFS, "signing requested but authenticated as guest\n"); |
3baf1a7b | 1764 | rc = sess_data->result; |
166cea4d | 1765 | out: |
a4e430c8 | 1766 | kfree_sensitive(sess_data); |
5478f9ba PS |
1767 | return rc; |
1768 | } | |
1769 | ||
1770 | int | |
1771 | SMB2_logoff(const unsigned int xid, struct cifs_ses *ses) | |
1772 | { | |
40eff45b | 1773 | struct smb_rqst rqst; |
5478f9ba PS |
1774 | struct smb2_logoff_req *req; /* response is also trivial struct */ |
1775 | int rc = 0; | |
1776 | struct TCP_Server_Info *server; | |
7fb8986e | 1777 | int flags = 0; |
45305eda RS |
1778 | unsigned int total_len; |
1779 | struct kvec iov[1]; | |
1780 | struct kvec rsp_iov; | |
1781 | int resp_buf_type; | |
5478f9ba | 1782 | |
f96637be | 1783 | cifs_dbg(FYI, "disconnect session %p\n", ses); |
5478f9ba PS |
1784 | |
1785 | if (ses && (ses->server)) | |
1786 | server = ses->server; | |
1787 | else | |
1788 | return -EIO; | |
1789 | ||
eb4c7df6 | 1790 | /* no need to send SMB logoff if uid already closed due to reconnect */ |
d1a931ce SP |
1791 | spin_lock(&ses->chan_lock); |
1792 | if (CIFS_ALL_CHANS_NEED_RECONNECT(ses)) { | |
1793 | spin_unlock(&ses->chan_lock); | |
eb4c7df6 | 1794 | goto smb2_session_already_dead; |
d1a931ce SP |
1795 | } |
1796 | spin_unlock(&ses->chan_lock); | |
eb4c7df6 | 1797 | |
352d96f3 AA |
1798 | rc = smb2_plain_req_init(SMB2_LOGOFF, NULL, ses->server, |
1799 | (void **) &req, &total_len); | |
5478f9ba PS |
1800 | if (rc) |
1801 | return rc; | |
1802 | ||
1803 | /* since no tcon, smb2_init can not do this, so do here */ | |
0d35e382 | 1804 | req->hdr.SessionId = cpu_to_le64(ses->Suid); |
7fb8986e PS |
1805 | |
1806 | if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) | |
1807 | flags |= CIFS_TRANSFORM_REQ; | |
1808 | else if (server->sign) | |
0d35e382 | 1809 | req->hdr.Flags |= SMB2_FLAGS_SIGNED; |
45305eda | 1810 | |
392e1c5d | 1811 | flags |= CIFS_NO_RSP_BUF; |
45305eda RS |
1812 | |
1813 | iov[0].iov_base = (char *)req; | |
1814 | iov[0].iov_len = total_len; | |
5478f9ba | 1815 | |
40eff45b RS |
1816 | memset(&rqst, 0, sizeof(struct smb_rqst)); |
1817 | rqst.rq_iov = iov; | |
1818 | rqst.rq_nvec = 1; | |
1819 | ||
352d96f3 AA |
1820 | rc = cifs_send_recv(xid, ses, ses->server, |
1821 | &rqst, &resp_buf_type, flags, &rsp_iov); | |
da502f7d | 1822 | cifs_small_buf_release(req); |
5478f9ba PS |
1823 | /* |
1824 | * No tcon so can't do | |
1825 | * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]); | |
1826 | */ | |
eb4c7df6 SP |
1827 | |
1828 | smb2_session_already_dead: | |
5478f9ba PS |
1829 | return rc; |
1830 | } | |
faaf946a PS |
1831 | |
1832 | static inline void cifs_stats_fail_inc(struct cifs_tcon *tcon, uint16_t code) | |
1833 | { | |
d60622eb | 1834 | cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_failed[code]); |
faaf946a PS |
1835 | } |
1836 | ||
1837 | #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */) | |
1838 | ||
de9f68df SF |
1839 | /* These are similar values to what Windows uses */ |
1840 | static inline void init_copy_chunk_defaults(struct cifs_tcon *tcon) | |
1841 | { | |
1842 | tcon->max_chunks = 256; | |
1843 | tcon->max_bytes_chunk = 1048576; | |
1844 | tcon->max_bytes_copy = 16777216; | |
1845 | } | |
1846 | ||
faaf946a PS |
1847 | int |
1848 | SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree, | |
1849 | struct cifs_tcon *tcon, const struct nls_table *cp) | |
1850 | { | |
40eff45b | 1851 | struct smb_rqst rqst; |
faaf946a PS |
1852 | struct smb2_tree_connect_req *req; |
1853 | struct smb2_tree_connect_rsp *rsp = NULL; | |
1854 | struct kvec iov[2]; | |
db3b5474 | 1855 | struct kvec rsp_iov = { NULL, 0 }; |
faaf946a PS |
1856 | int rc = 0; |
1857 | int resp_buftype; | |
1858 | int unc_path_len; | |
faaf946a | 1859 | __le16 *unc_path = NULL; |
7fb8986e | 1860 | int flags = 0; |
661bb943 | 1861 | unsigned int total_len; |
352d96f3 AA |
1862 | struct TCP_Server_Info *server; |
1863 | ||
1864 | /* always use master channel */ | |
1865 | server = ses->server; | |
faaf946a | 1866 | |
f96637be | 1867 | cifs_dbg(FYI, "TCON\n"); |
faaf946a | 1868 | |
afe6f653 | 1869 | if (!server || !tree) |
faaf946a PS |
1870 | return -EIO; |
1871 | ||
faaf946a PS |
1872 | unc_path = kmalloc(MAX_SHARENAME_LENGTH * 2, GFP_KERNEL); |
1873 | if (unc_path == NULL) | |
1874 | return -ENOMEM; | |
1875 | ||
5574920c NJ |
1876 | unc_path_len = cifs_strtoUTF16(unc_path, tree, strlen(tree), cp); |
1877 | if (unc_path_len <= 0) { | |
faaf946a PS |
1878 | kfree(unc_path); |
1879 | return -EINVAL; | |
1880 | } | |
5574920c | 1881 | unc_path_len *= 2; |
faaf946a | 1882 | |
806a28ef | 1883 | /* SMB2 TREE_CONNECT request must be called with TreeId == 0 */ |
b327a717 | 1884 | tcon->tid = 0; |
fae8044c | 1885 | atomic_set(&tcon->num_remote_opens, 0); |
352d96f3 AA |
1886 | rc = smb2_plain_req_init(SMB2_TREE_CONNECT, tcon, server, |
1887 | (void **) &req, &total_len); | |
faaf946a PS |
1888 | if (rc) { |
1889 | kfree(unc_path); | |
1890 | return rc; | |
1891 | } | |
1892 | ||
5a77e75f | 1893 | if (smb3_encryption_required(tcon)) |
ae6f8dd4 | 1894 | flags |= CIFS_TRANSFORM_REQ; |
faaf946a PS |
1895 | |
1896 | iov[0].iov_base = (char *)req; | |
661bb943 RS |
1897 | /* 1 for pad */ |
1898 | iov[0].iov_len = total_len - 1; | |
faaf946a PS |
1899 | |
1900 | /* Testing shows that buffer offset must be at location of Buffer[0] */ | |
eb3e28c1 | 1901 | req->PathOffset = cpu_to_le16(sizeof(struct smb2_tree_connect_req)); |
5574920c | 1902 | req->PathLength = cpu_to_le16(unc_path_len); |
faaf946a PS |
1903 | iov[1].iov_base = unc_path; |
1904 | iov[1].iov_len = unc_path_len; | |
1905 | ||
e71ab2aa RS |
1906 | /* |
1907 | * 3.11 tcon req must be signed if not encrypted. See MS-SMB2 3.2.4.1.1 | |
1908 | * unless it is guest or anonymous user. See MS-SMB2 3.2.5.3.1 | |
8c11a607 | 1909 | * (Samba servers don't always set the flag so also check if null user) |
e71ab2aa | 1910 | */ |
afe6f653 | 1911 | if ((server->dialect == SMB311_PROT_ID) && |
e71ab2aa | 1912 | !smb3_encryption_required(tcon) && |
8c11a607 SF |
1913 | !(ses->session_flags & |
1914 | (SMB2_SESSION_FLAG_IS_GUEST|SMB2_SESSION_FLAG_IS_NULL)) && | |
1915 | ((ses->user_name != NULL) || (ses->sectype == Kerberos))) | |
0d35e382 | 1916 | req->hdr.Flags |= SMB2_FLAGS_SIGNED; |
6188f28b | 1917 | |
40eff45b RS |
1918 | memset(&rqst, 0, sizeof(struct smb_rqst)); |
1919 | rqst.rq_iov = iov; | |
1920 | rqst.rq_nvec = 2; | |
1921 | ||
4fe75c4e | 1922 | /* Need 64 for max size write so ask for more in case not there yet */ |
5e90aa21 SP |
1923 | if (server->credits >= server->max_credits) |
1924 | req->hdr.CreditRequest = cpu_to_le16(0); | |
1925 | else | |
1926 | req->hdr.CreditRequest = cpu_to_le16( | |
1927 | min_t(int, server->max_credits - | |
1928 | server->credits, 64)); | |
4fe75c4e | 1929 | |
352d96f3 AA |
1930 | rc = cifs_send_recv(xid, ses, server, |
1931 | &rqst, &resp_buftype, flags, &rsp_iov); | |
da502f7d PS |
1932 | cifs_small_buf_release(req); |
1933 | rsp = (struct smb2_tree_connect_rsp *)rsp_iov.iov_base; | |
f8af49dd | 1934 | trace_smb3_tcon(xid, tcon->tid, ses->Suid, tree, rc); |
bac35395 | 1935 | if ((rc != 0) || (rsp == NULL)) { |
3559134e SF |
1936 | cifs_stats_fail_inc(tcon, SMB2_TREE_CONNECT_HE); |
1937 | tcon->need_reconnect = true; | |
faaf946a PS |
1938 | goto tcon_error_exit; |
1939 | } | |
1940 | ||
cd123007 CJ |
1941 | switch (rsp->ShareType) { |
1942 | case SMB2_SHARE_TYPE_DISK: | |
f96637be | 1943 | cifs_dbg(FYI, "connection to disk share\n"); |
cd123007 CJ |
1944 | break; |
1945 | case SMB2_SHARE_TYPE_PIPE: | |
b327a717 | 1946 | tcon->pipe = true; |
f96637be | 1947 | cifs_dbg(FYI, "connection to pipe share\n"); |
cd123007 CJ |
1948 | break; |
1949 | case SMB2_SHARE_TYPE_PRINT: | |
b327a717 | 1950 | tcon->print = true; |
f96637be | 1951 | cifs_dbg(FYI, "connection to printer\n"); |
cd123007 CJ |
1952 | break; |
1953 | default: | |
afe6f653 | 1954 | cifs_server_dbg(VFS, "unknown share type %d\n", rsp->ShareType); |
faaf946a PS |
1955 | rc = -EOPNOTSUPP; |
1956 | goto tcon_error_exit; | |
1957 | } | |
1958 | ||
1959 | tcon->share_flags = le32_to_cpu(rsp->ShareFlags); | |
769ee6a4 | 1960 | tcon->capabilities = rsp->Capabilities; /* we keep caps little endian */ |
faaf946a | 1961 | tcon->maximal_access = le32_to_cpu(rsp->MaximalAccess); |
0d35e382 | 1962 | tcon->tid = le32_to_cpu(rsp->hdr.Id.SyncId.TreeId); |
68e14569 | 1963 | strscpy(tcon->tree_name, tree, sizeof(tcon->tree_name)); |
faaf946a PS |
1964 | |
1965 | if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) && | |
1966 | ((tcon->share_flags & SHI1005_FLAGS_DFS) == 0)) | |
3175eb9b | 1967 | cifs_tcon_dbg(VFS, "DFS capability contradicts DFS flag\n"); |
ae6f8dd4 PS |
1968 | |
1969 | if (tcon->seal && | |
afe6f653 | 1970 | !(server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION)) |
3175eb9b | 1971 | cifs_tcon_dbg(VFS, "Encryption is requested but not supported\n"); |
ae6f8dd4 | 1972 | |
de9f68df | 1973 | init_copy_chunk_defaults(tcon); |
afe6f653 RS |
1974 | if (server->ops->validate_negotiate) |
1975 | rc = server->ops->validate_negotiate(xid, tcon); | |
cbd4cbab SF |
1976 | if (rc == 0) /* See MS-SMB2 2.2.10 and 3.2.5.5 */ |
1977 | if (tcon->share_flags & SMB2_SHAREFLAG_ISOLATED_TRANSPORT) | |
1978 | server->nosharesock = true; | |
faaf946a | 1979 | tcon_exit: |
f8af49dd | 1980 | |
faaf946a PS |
1981 | free_rsp_buf(resp_buftype, rsp); |
1982 | kfree(unc_path); | |
1983 | return rc; | |
1984 | ||
1985 | tcon_error_exit: | |
0d35e382 | 1986 | if (rsp && rsp->hdr.Status == STATUS_BAD_NETWORK_NAME) |
3175eb9b | 1987 | cifs_tcon_dbg(VFS, "BAD_NETWORK_NAME: %s\n", tree); |
faaf946a PS |
1988 | goto tcon_exit; |
1989 | } | |
1990 | ||
1991 | int | |
1992 | SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon) | |
1993 | { | |
40eff45b | 1994 | struct smb_rqst rqst; |
faaf946a PS |
1995 | struct smb2_tree_disconnect_req *req; /* response is trivial */ |
1996 | int rc = 0; | |
faaf946a | 1997 | struct cifs_ses *ses = tcon->ses; |
7fb8986e | 1998 | int flags = 0; |
4eecf4cf RS |
1999 | unsigned int total_len; |
2000 | struct kvec iov[1]; | |
2001 | struct kvec rsp_iov; | |
2002 | int resp_buf_type; | |
faaf946a | 2003 | |
f96637be | 2004 | cifs_dbg(FYI, "Tree Disconnect\n"); |
faaf946a | 2005 | |
68a6afa7 | 2006 | if (!ses || !(ses->server)) |
faaf946a PS |
2007 | return -EIO; |
2008 | ||
68e14569 | 2009 | trace_smb3_tdis_enter(xid, tcon->tid, ses->Suid, tcon->tree_name); |
d1a931ce SP |
2010 | spin_lock(&ses->chan_lock); |
2011 | if ((tcon->need_reconnect) || | |
2012 | (CIFS_ALL_CHANS_NEED_RECONNECT(tcon->ses))) { | |
2013 | spin_unlock(&ses->chan_lock); | |
faaf946a | 2014 | return 0; |
d1a931ce SP |
2015 | } |
2016 | spin_unlock(&ses->chan_lock); | |
faaf946a | 2017 | |
dcb45fd7 | 2018 | invalidate_all_cached_dirs(tcon); |
72e73c78 | 2019 | |
352d96f3 AA |
2020 | rc = smb2_plain_req_init(SMB2_TREE_DISCONNECT, tcon, ses->server, |
2021 | (void **) &req, | |
2022 | &total_len); | |
faaf946a PS |
2023 | if (rc) |
2024 | return rc; | |
2025 | ||
5a77e75f | 2026 | if (smb3_encryption_required(tcon)) |
7fb8986e PS |
2027 | flags |= CIFS_TRANSFORM_REQ; |
2028 | ||
392e1c5d | 2029 | flags |= CIFS_NO_RSP_BUF; |
4eecf4cf RS |
2030 | |
2031 | iov[0].iov_base = (char *)req; | |
2032 | iov[0].iov_len = total_len; | |
2033 | ||
40eff45b RS |
2034 | memset(&rqst, 0, sizeof(struct smb_rqst)); |
2035 | rqst.rq_iov = iov; | |
2036 | rqst.rq_nvec = 1; | |
2037 | ||
352d96f3 AA |
2038 | rc = cifs_send_recv(xid, ses, ses->server, |
2039 | &rqst, &resp_buf_type, flags, &rsp_iov); | |
da502f7d | 2040 | cifs_small_buf_release(req); |
68e14569 | 2041 | if (rc) { |
faaf946a | 2042 | cifs_stats_fail_inc(tcon, SMB2_TREE_DISCONNECT_HE); |
68e14569 SF |
2043 | trace_smb3_tdis_err(xid, tcon->tid, ses->Suid, rc); |
2044 | } | |
2045 | trace_smb3_tdis_done(xid, tcon->tid, ses->Suid); | |
faaf946a PS |
2046 | |
2047 | return rc; | |
2048 | } | |
2503a0db | 2049 | |
b8c32dbb | 2050 | |
63eb3def PS |
2051 | static struct create_durable * |
2052 | create_durable_buf(void) | |
2053 | { | |
2054 | struct create_durable *buf; | |
2055 | ||
2056 | buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL); | |
2057 | if (!buf) | |
2058 | return NULL; | |
2059 | ||
2060 | buf->ccontext.DataOffset = cpu_to_le16(offsetof | |
9cbc0b73 | 2061 | (struct create_durable, Data)); |
63eb3def PS |
2062 | buf->ccontext.DataLength = cpu_to_le32(16); |
2063 | buf->ccontext.NameOffset = cpu_to_le16(offsetof | |
2064 | (struct create_durable, Name)); | |
2065 | buf->ccontext.NameLength = cpu_to_le16(4); | |
12197a7f | 2066 | /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DHnQ" */ |
63eb3def PS |
2067 | buf->Name[0] = 'D'; |
2068 | buf->Name[1] = 'H'; | |
2069 | buf->Name[2] = 'n'; | |
2070 | buf->Name[3] = 'Q'; | |
2071 | return buf; | |
2072 | } | |
2073 | ||
9cbc0b73 PS |
2074 | static struct create_durable * |
2075 | create_reconnect_durable_buf(struct cifs_fid *fid) | |
2076 | { | |
2077 | struct create_durable *buf; | |
2078 | ||
2079 | buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL); | |
2080 | if (!buf) | |
2081 | return NULL; | |
2082 | ||
2083 | buf->ccontext.DataOffset = cpu_to_le16(offsetof | |
2084 | (struct create_durable, Data)); | |
2085 | buf->ccontext.DataLength = cpu_to_le32(16); | |
2086 | buf->ccontext.NameOffset = cpu_to_le16(offsetof | |
2087 | (struct create_durable, Name)); | |
2088 | buf->ccontext.NameLength = cpu_to_le16(4); | |
2089 | buf->Data.Fid.PersistentFileId = fid->persistent_fid; | |
2090 | buf->Data.Fid.VolatileFileId = fid->volatile_fid; | |
12197a7f | 2091 | /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT is "DHnC" */ |
9cbc0b73 PS |
2092 | buf->Name[0] = 'D'; |
2093 | buf->Name[1] = 'H'; | |
2094 | buf->Name[2] = 'n'; | |
2095 | buf->Name[3] = 'C'; | |
2096 | return buf; | |
2097 | } | |
2098 | ||
89a5bfa3 SF |
2099 | static void |
2100 | parse_query_id_ctxt(struct create_context *cc, struct smb2_file_all_info *buf) | |
2101 | { | |
1149c846 | 2102 | struct create_disk_id_rsp *pdisk_id = (struct create_disk_id_rsp *)cc; |
89a5bfa3 SF |
2103 | |
2104 | cifs_dbg(FYI, "parse query id context 0x%llx 0x%llx\n", | |
2105 | pdisk_id->DiskFileId, pdisk_id->VolumeId); | |
2106 | buf->IndexNumber = pdisk_id->DiskFileId; | |
2107 | } | |
2108 | ||
ab3459d8 | 2109 | static void |
69dda305 AA |
2110 | parse_posix_ctxt(struct create_context *cc, struct smb2_file_all_info *info, |
2111 | struct create_posix_rsp *posix) | |
ab3459d8 | 2112 | { |
69dda305 AA |
2113 | int sid_len; |
2114 | u8 *beg = (u8 *)cc + le16_to_cpu(cc->DataOffset); | |
2115 | u8 *end = beg + le32_to_cpu(cc->DataLength); | |
2116 | u8 *sid; | |
ab3459d8 | 2117 | |
69dda305 AA |
2118 | memset(posix, 0, sizeof(*posix)); |
2119 | ||
2120 | posix->nlink = le32_to_cpu(*(__le32 *)(beg + 0)); | |
2121 | posix->reparse_tag = le32_to_cpu(*(__le32 *)(beg + 4)); | |
2122 | posix->mode = le32_to_cpu(*(__le32 *)(beg + 8)); | |
2123 | ||
2124 | sid = beg + 12; | |
2125 | sid_len = posix_info_sid_size(sid, end); | |
2126 | if (sid_len < 0) { | |
2127 | cifs_dbg(VFS, "bad owner sid in posix create response\n"); | |
2128 | return; | |
2129 | } | |
2130 | memcpy(&posix->owner, sid, sid_len); | |
2131 | ||
2132 | sid = sid + sid_len; | |
2133 | sid_len = posix_info_sid_size(sid, end); | |
2134 | if (sid_len < 0) { | |
2135 | cifs_dbg(VFS, "bad group sid in posix create response\n"); | |
2136 | return; | |
2137 | } | |
2138 | memcpy(&posix->group, sid, sid_len); | |
2e8af978 | 2139 | |
69dda305 AA |
2140 | cifs_dbg(FYI, "nlink=%d mode=%o reparse_tag=%x\n", |
2141 | posix->nlink, posix->mode, posix->reparse_tag); | |
ab3459d8 SF |
2142 | } |
2143 | ||
89a5bfa3 SF |
2144 | void |
2145 | smb2_parse_contexts(struct TCP_Server_Info *server, | |
69dda305 AA |
2146 | struct smb2_create_rsp *rsp, |
2147 | unsigned int *epoch, char *lease_key, __u8 *oplock, | |
2148 | struct smb2_file_all_info *buf, | |
2149 | struct create_posix_rsp *posix) | |
b8c32dbb PS |
2150 | { |
2151 | char *data_offset; | |
b5c7cde3 | 2152 | struct create_context *cc; |
deb7deff JM |
2153 | unsigned int next; |
2154 | unsigned int remaining; | |
fd554396 | 2155 | char *name; |
3ece60e3 CIK |
2156 | static const char smb3_create_tag_posix[] = { |
2157 | 0x93, 0xAD, 0x25, 0x50, 0x9C, | |
2158 | 0xB4, 0x11, 0xE7, 0xB4, 0x23, 0x83, | |
2159 | 0xDE, 0x96, 0x8B, 0xCD, 0x7C | |
2160 | }; | |
b8c32dbb | 2161 | |
89a5bfa3 | 2162 | *oplock = 0; |
1fc6ad2f | 2163 | data_offset = (char *)rsp + le32_to_cpu(rsp->CreateContextsOffset); |
deb7deff | 2164 | remaining = le32_to_cpu(rsp->CreateContextsLength); |
b5c7cde3 | 2165 | cc = (struct create_context *)data_offset; |
89a5bfa3 SF |
2166 | |
2167 | /* Initialize inode number to 0 in case no valid data in qfid context */ | |
2168 | if (buf) | |
2169 | buf->IndexNumber = 0; | |
2170 | ||
deb7deff | 2171 | while (remaining >= sizeof(struct create_context)) { |
b5c7cde3 | 2172 | name = le16_to_cpu(cc->NameOffset) + (char *)cc; |
deb7deff | 2173 | if (le16_to_cpu(cc->NameLength) == 4 && |
89a5bfa3 SF |
2174 | strncmp(name, SMB2_CREATE_REQUEST_LEASE, 4) == 0) |
2175 | *oplock = server->ops->parse_lease_buf(cc, epoch, | |
2176 | lease_key); | |
2177 | else if (buf && (le16_to_cpu(cc->NameLength) == 4) && | |
2178 | strncmp(name, SMB2_CREATE_QUERY_ON_DISK_ID, 4) == 0) | |
2179 | parse_query_id_ctxt(cc, buf); | |
ab3459d8 | 2180 | else if ((le16_to_cpu(cc->NameLength) == 16)) { |
69dda305 AA |
2181 | if (posix && |
2182 | memcmp(name, smb3_create_tag_posix, 16) == 0) | |
2183 | parse_posix_ctxt(cc, buf, posix); | |
ab3459d8 SF |
2184 | } |
2185 | /* else { | |
2186 | cifs_dbg(FYI, "Context not matched with len %d\n", | |
2187 | le16_to_cpu(cc->NameLength)); | |
2188 | cifs_dump_mem("Cctxt name: ", name, 4); | |
2189 | } */ | |
deb7deff JM |
2190 | |
2191 | next = le32_to_cpu(cc->Next); | |
2192 | if (!next) | |
2193 | break; | |
2194 | remaining -= next; | |
2195 | cc = (struct create_context *)((char *)cc + next); | |
2196 | } | |
b8c32dbb | 2197 | |
89a5bfa3 SF |
2198 | if (rsp->OplockLevel != SMB2_OPLOCK_LEVEL_LEASE) |
2199 | *oplock = rsp->OplockLevel; | |
2200 | ||
2201 | return; | |
b8c32dbb PS |
2202 | } |
2203 | ||
d22cbfec | 2204 | static int |
919e57c3 VL |
2205 | add_lease_context(struct TCP_Server_Info *server, |
2206 | struct smb2_create_req *req, | |
2207 | struct kvec *iov, | |
729c0c9d | 2208 | unsigned int *num_iovec, u8 *lease_key, __u8 *oplock) |
d22cbfec | 2209 | { |
d22cbfec PS |
2210 | unsigned int num = *num_iovec; |
2211 | ||
729c0c9d | 2212 | iov[num].iov_base = server->ops->create_lease_buf(lease_key, *oplock); |
d22cbfec PS |
2213 | if (iov[num].iov_base == NULL) |
2214 | return -ENOMEM; | |
a41a28bd | 2215 | iov[num].iov_len = server->vals->create_lease_size; |
d22cbfec | 2216 | req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_LEASE; |
d22cbfec PS |
2217 | *num_iovec = num + 1; |
2218 | return 0; | |
2219 | } | |
2220 | ||
b56eae4d | 2221 | static struct create_durable_v2 * |
ca567eb2 | 2222 | create_durable_v2_buf(struct cifs_open_parms *oparms) |
b56eae4d | 2223 | { |
ca567eb2 | 2224 | struct cifs_fid *pfid = oparms->fid; |
b56eae4d SF |
2225 | struct create_durable_v2 *buf; |
2226 | ||
2227 | buf = kzalloc(sizeof(struct create_durable_v2), GFP_KERNEL); | |
2228 | if (!buf) | |
2229 | return NULL; | |
2230 | ||
2231 | buf->ccontext.DataOffset = cpu_to_le16(offsetof | |
2232 | (struct create_durable_v2, dcontext)); | |
2233 | buf->ccontext.DataLength = cpu_to_le32(sizeof(struct durable_context_v2)); | |
2234 | buf->ccontext.NameOffset = cpu_to_le16(offsetof | |
2235 | (struct create_durable_v2, Name)); | |
2236 | buf->ccontext.NameLength = cpu_to_le16(4); | |
2237 | ||
ca567eb2 SF |
2238 | /* |
2239 | * NB: Handle timeout defaults to 0, which allows server to choose | |
2240 | * (most servers default to 120 seconds) and most clients default to 0. | |
2241 | * This can be overridden at mount ("handletimeout=") if the user wants | |
2242 | * a different persistent (or resilient) handle timeout for all opens | |
2c75426c | 2243 | * on a particular SMB3 mount. |
ca567eb2 SF |
2244 | */ |
2245 | buf->dcontext.Timeout = cpu_to_le32(oparms->tcon->handle_timeout); | |
b56eae4d | 2246 | buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT); |
fa70b87c | 2247 | generate_random_uuid(buf->dcontext.CreateGuid); |
b56eae4d SF |
2248 | memcpy(pfid->create_guid, buf->dcontext.CreateGuid, 16); |
2249 | ||
2250 | /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DH2Q" */ | |
2251 | buf->Name[0] = 'D'; | |
2252 | buf->Name[1] = 'H'; | |
2253 | buf->Name[2] = '2'; | |
2254 | buf->Name[3] = 'Q'; | |
2255 | return buf; | |
2256 | } | |
2257 | ||
2258 | static struct create_durable_handle_reconnect_v2 * | |
2259 | create_reconnect_durable_v2_buf(struct cifs_fid *fid) | |
2260 | { | |
2261 | struct create_durable_handle_reconnect_v2 *buf; | |
2262 | ||
2263 | buf = kzalloc(sizeof(struct create_durable_handle_reconnect_v2), | |
2264 | GFP_KERNEL); | |
2265 | if (!buf) | |
2266 | return NULL; | |
2267 | ||
2268 | buf->ccontext.DataOffset = | |
2269 | cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2, | |
2270 | dcontext)); | |
2271 | buf->ccontext.DataLength = | |
2272 | cpu_to_le32(sizeof(struct durable_reconnect_context_v2)); | |
2273 | buf->ccontext.NameOffset = | |
2274 | cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2, | |
2275 | Name)); | |
2276 | buf->ccontext.NameLength = cpu_to_le16(4); | |
2277 | ||
2278 | buf->dcontext.Fid.PersistentFileId = fid->persistent_fid; | |
2279 | buf->dcontext.Fid.VolatileFileId = fid->volatile_fid; | |
2280 | buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT); | |
2281 | memcpy(buf->dcontext.CreateGuid, fid->create_guid, 16); | |
2282 | ||
2283 | /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2 is "DH2C" */ | |
2284 | buf->Name[0] = 'D'; | |
2285 | buf->Name[1] = 'H'; | |
2286 | buf->Name[2] = '2'; | |
2287 | buf->Name[3] = 'C'; | |
2288 | return buf; | |
2289 | } | |
2290 | ||
63eb3def | 2291 | static int |
b56eae4d SF |
2292 | add_durable_v2_context(struct kvec *iov, unsigned int *num_iovec, |
2293 | struct cifs_open_parms *oparms) | |
2294 | { | |
b56eae4d SF |
2295 | unsigned int num = *num_iovec; |
2296 | ||
ca567eb2 | 2297 | iov[num].iov_base = create_durable_v2_buf(oparms); |
b56eae4d SF |
2298 | if (iov[num].iov_base == NULL) |
2299 | return -ENOMEM; | |
2300 | iov[num].iov_len = sizeof(struct create_durable_v2); | |
b56eae4d SF |
2301 | *num_iovec = num + 1; |
2302 | return 0; | |
2303 | } | |
2304 | ||
2305 | static int | |
2306 | add_durable_reconnect_v2_context(struct kvec *iov, unsigned int *num_iovec, | |
9cbc0b73 | 2307 | struct cifs_open_parms *oparms) |
63eb3def | 2308 | { |
63eb3def PS |
2309 | unsigned int num = *num_iovec; |
2310 | ||
b56eae4d SF |
2311 | /* indicate that we don't need to relock the file */ |
2312 | oparms->reconnect = false; | |
2313 | ||
2314 | iov[num].iov_base = create_reconnect_durable_v2_buf(oparms->fid); | |
2315 | if (iov[num].iov_base == NULL) | |
2316 | return -ENOMEM; | |
2317 | iov[num].iov_len = sizeof(struct create_durable_handle_reconnect_v2); | |
b56eae4d SF |
2318 | *num_iovec = num + 1; |
2319 | return 0; | |
2320 | } | |
2321 | ||
2322 | static int | |
2323 | add_durable_context(struct kvec *iov, unsigned int *num_iovec, | |
2324 | struct cifs_open_parms *oparms, bool use_persistent) | |
2325 | { | |
b56eae4d SF |
2326 | unsigned int num = *num_iovec; |
2327 | ||
2328 | if (use_persistent) { | |
2329 | if (oparms->reconnect) | |
2330 | return add_durable_reconnect_v2_context(iov, num_iovec, | |
2331 | oparms); | |
2332 | else | |
2333 | return add_durable_v2_context(iov, num_iovec, oparms); | |
2334 | } | |
2335 | ||
9cbc0b73 PS |
2336 | if (oparms->reconnect) { |
2337 | iov[num].iov_base = create_reconnect_durable_buf(oparms->fid); | |
2338 | /* indicate that we don't need to relock the file */ | |
2339 | oparms->reconnect = false; | |
2340 | } else | |
2341 | iov[num].iov_base = create_durable_buf(); | |
63eb3def PS |
2342 | if (iov[num].iov_base == NULL) |
2343 | return -ENOMEM; | |
2344 | iov[num].iov_len = sizeof(struct create_durable); | |
63eb3def PS |
2345 | *num_iovec = num + 1; |
2346 | return 0; | |
2347 | } | |
2348 | ||
cdeaf9d0 SF |
2349 | /* See MS-SMB2 2.2.13.2.7 */ |
2350 | static struct crt_twarp_ctxt * | |
2351 | create_twarp_buf(__u64 timewarp) | |
2352 | { | |
2353 | struct crt_twarp_ctxt *buf; | |
2354 | ||
2355 | buf = kzalloc(sizeof(struct crt_twarp_ctxt), GFP_KERNEL); | |
2356 | if (!buf) | |
2357 | return NULL; | |
2358 | ||
2359 | buf->ccontext.DataOffset = cpu_to_le16(offsetof | |
2360 | (struct crt_twarp_ctxt, Timestamp)); | |
2361 | buf->ccontext.DataLength = cpu_to_le32(8); | |
2362 | buf->ccontext.NameOffset = cpu_to_le16(offsetof | |
2363 | (struct crt_twarp_ctxt, Name)); | |
2364 | buf->ccontext.NameLength = cpu_to_le16(4); | |
2365 | /* SMB2_CREATE_TIMEWARP_TOKEN is "TWrp" */ | |
2366 | buf->Name[0] = 'T'; | |
2367 | buf->Name[1] = 'W'; | |
2368 | buf->Name[2] = 'r'; | |
2369 | buf->Name[3] = 'p'; | |
2370 | buf->Timestamp = cpu_to_le64(timewarp); | |
2371 | return buf; | |
2372 | } | |
2373 | ||
2374 | /* See MS-SMB2 2.2.13.2.7 */ | |
2375 | static int | |
2376 | add_twarp_context(struct kvec *iov, unsigned int *num_iovec, __u64 timewarp) | |
2377 | { | |
cdeaf9d0 SF |
2378 | unsigned int num = *num_iovec; |
2379 | ||
2380 | iov[num].iov_base = create_twarp_buf(timewarp); | |
2381 | if (iov[num].iov_base == NULL) | |
2382 | return -ENOMEM; | |
2383 | iov[num].iov_len = sizeof(struct crt_twarp_ctxt); | |
cdeaf9d0 SF |
2384 | *num_iovec = num + 1; |
2385 | return 0; | |
2386 | } | |
2387 | ||
2c75426c | 2388 | /* See http://technet.microsoft.com/en-us/library/hh509017(v=ws.10).aspx */ |
975221ec SF |
2389 | static void setup_owner_group_sids(char *buf) |
2390 | { | |
2391 | struct owner_group_sids *sids = (struct owner_group_sids *)buf; | |
2392 | ||
2393 | /* Populate the user ownership fields S-1-5-88-1 */ | |
2394 | sids->owner.Revision = 1; | |
2395 | sids->owner.NumAuth = 3; | |
2396 | sids->owner.Authority[5] = 5; | |
2397 | sids->owner.SubAuthorities[0] = cpu_to_le32(88); | |
2398 | sids->owner.SubAuthorities[1] = cpu_to_le32(1); | |
2399 | sids->owner.SubAuthorities[2] = cpu_to_le32(current_fsuid().val); | |
2400 | ||
2401 | /* Populate the group ownership fields S-1-5-88-2 */ | |
2402 | sids->group.Revision = 1; | |
2403 | sids->group.NumAuth = 3; | |
2404 | sids->group.Authority[5] = 5; | |
2405 | sids->group.SubAuthorities[0] = cpu_to_le32(88); | |
2406 | sids->group.SubAuthorities[1] = cpu_to_le32(2); | |
2407 | sids->group.SubAuthorities[2] = cpu_to_le32(current_fsgid().val); | |
a7a519a4 SF |
2408 | |
2409 | cifs_dbg(FYI, "owner S-1-5-88-1-%d, group S-1-5-88-2-%d\n", current_fsuid().val, current_fsgid().val); | |
975221ec SF |
2410 | } |
2411 | ||
fdef665b SF |
2412 | /* See MS-SMB2 2.2.13.2.2 and MS-DTYP 2.4.6 */ |
2413 | static struct crt_sd_ctxt * | |
975221ec | 2414 | create_sd_buf(umode_t mode, bool set_owner, unsigned int *len) |
fdef665b SF |
2415 | { |
2416 | struct crt_sd_ctxt *buf; | |
ea64370b RS |
2417 | __u8 *ptr, *aclptr; |
2418 | unsigned int acelen, acl_size, ace_count; | |
975221ec SF |
2419 | unsigned int owner_offset = 0; |
2420 | unsigned int group_offset = 0; | |
f09bd695 | 2421 | struct smb3_acl acl = {}; |
975221ec | 2422 | |
d7173623 | 2423 | *len = round_up(sizeof(struct crt_sd_ctxt) + (sizeof(struct cifs_ace) * 4), 8); |
975221ec SF |
2424 | |
2425 | if (set_owner) { | |
975221ec SF |
2426 | /* sizeof(struct owner_group_sids) is already multiple of 8 so no need to round */ |
2427 | *len += sizeof(struct owner_group_sids); | |
2428 | } | |
fdef665b | 2429 | |
fdef665b SF |
2430 | buf = kzalloc(*len, GFP_KERNEL); |
2431 | if (buf == NULL) | |
2432 | return buf; | |
2433 | ||
ea64370b | 2434 | ptr = (__u8 *)&buf[1]; |
975221ec | 2435 | if (set_owner) { |
ea64370b RS |
2436 | /* offset fields are from beginning of security descriptor not of create context */ |
2437 | owner_offset = ptr - (__u8 *)&buf->sd; | |
975221ec | 2438 | buf->sd.OffsetOwner = cpu_to_le32(owner_offset); |
ea64370b | 2439 | group_offset = owner_offset + offsetof(struct owner_group_sids, group); |
975221ec | 2440 | buf->sd.OffsetGroup = cpu_to_le32(group_offset); |
ea64370b RS |
2441 | |
2442 | setup_owner_group_sids(ptr); | |
2443 | ptr += sizeof(struct owner_group_sids); | |
975221ec SF |
2444 | } else { |
2445 | buf->sd.OffsetOwner = 0; | |
2446 | buf->sd.OffsetGroup = 0; | |
2447 | } | |
2448 | ||
ea64370b | 2449 | buf->ccontext.DataOffset = cpu_to_le16(offsetof(struct crt_sd_ctxt, sd)); |
975221ec | 2450 | buf->ccontext.NameOffset = cpu_to_le16(offsetof(struct crt_sd_ctxt, Name)); |
fdef665b SF |
2451 | buf->ccontext.NameLength = cpu_to_le16(4); |
2452 | /* SMB2_CREATE_SD_BUFFER_TOKEN is "SecD" */ | |
2453 | buf->Name[0] = 'S'; | |
2454 | buf->Name[1] = 'e'; | |
2455 | buf->Name[2] = 'c'; | |
2456 | buf->Name[3] = 'D'; | |
2457 | buf->sd.Revision = 1; /* Must be one see MS-DTYP 2.4.6 */ | |
ea64370b | 2458 | |
fdef665b SF |
2459 | /* |
2460 | * ACL is "self relative" ie ACL is stored in contiguous block of memory | |
2461 | * and "DP" ie the DACL is present | |
2462 | */ | |
2463 | buf->sd.Control = cpu_to_le16(ACL_CONTROL_SR | ACL_CONTROL_DP); | |
2464 | ||
2465 | /* offset owner, group and Sbz1 and SACL are all zero */ | |
ea64370b RS |
2466 | buf->sd.OffsetDacl = cpu_to_le32(ptr - (__u8 *)&buf->sd); |
2467 | /* Ship the ACL for now. we will copy it into buf later. */ | |
2468 | aclptr = ptr; | |
b06d893e | 2469 | ptr += sizeof(struct smb3_acl); |
fdef665b SF |
2470 | |
2471 | /* create one ACE to hold the mode embedded in reserved special SID */ | |
ea64370b RS |
2472 | acelen = setup_special_mode_ACE((struct cifs_ace *)ptr, (__u64)mode); |
2473 | ptr += acelen; | |
2474 | acl_size = acelen + sizeof(struct smb3_acl); | |
2475 | ace_count = 1; | |
975221ec SF |
2476 | |
2477 | if (set_owner) { | |
2478 | /* we do not need to reallocate buffer to add the two more ACEs. plenty of space */ | |
ea64370b RS |
2479 | acelen = setup_special_user_owner_ACE((struct cifs_ace *)ptr); |
2480 | ptr += acelen; | |
2481 | acl_size += acelen; | |
2482 | ace_count += 1; | |
2483 | } | |
975221ec | 2484 | |
643fbcee | 2485 | /* and one more ACE to allow access for authenticated users */ |
ea64370b RS |
2486 | acelen = setup_authusers_ACE((struct cifs_ace *)ptr); |
2487 | ptr += acelen; | |
2488 | acl_size += acelen; | |
2489 | ace_count += 1; | |
2490 | ||
2491 | acl.AclRevision = ACL_REVISION; /* See 2.4.4.1 of MS-DTYP */ | |
2492 | acl.AclSize = cpu_to_le16(acl_size); | |
2493 | acl.AceCount = cpu_to_le16(ace_count); | |
f09bd695 | 2494 | /* acl.Sbz1 and Sbz2 MBZ so are not set here, but initialized above */ |
b06d893e | 2495 | memcpy(aclptr, &acl, sizeof(struct smb3_acl)); |
ea64370b RS |
2496 | |
2497 | buf->ccontext.DataLength = cpu_to_le32(ptr - (__u8 *)&buf->sd); | |
d7173623 | 2498 | *len = round_up((unsigned int)(ptr - (__u8 *)buf), 8); |
975221ec | 2499 | |
fdef665b SF |
2500 | return buf; |
2501 | } | |
2502 | ||
2503 | static int | |
975221ec | 2504 | add_sd_context(struct kvec *iov, unsigned int *num_iovec, umode_t mode, bool set_owner) |
fdef665b | 2505 | { |
fdef665b SF |
2506 | unsigned int num = *num_iovec; |
2507 | unsigned int len = 0; | |
2508 | ||
975221ec | 2509 | iov[num].iov_base = create_sd_buf(mode, set_owner, &len); |
fdef665b SF |
2510 | if (iov[num].iov_base == NULL) |
2511 | return -ENOMEM; | |
2512 | iov[num].iov_len = len; | |
fdef665b SF |
2513 | *num_iovec = num + 1; |
2514 | return 0; | |
2515 | } | |
2516 | ||
ff2a09e9 SF |
2517 | static struct crt_query_id_ctxt * |
2518 | create_query_id_buf(void) | |
2519 | { | |
2520 | struct crt_query_id_ctxt *buf; | |
2521 | ||
2522 | buf = kzalloc(sizeof(struct crt_query_id_ctxt), GFP_KERNEL); | |
2523 | if (!buf) | |
2524 | return NULL; | |
2525 | ||
2526 | buf->ccontext.DataOffset = cpu_to_le16(0); | |
2527 | buf->ccontext.DataLength = cpu_to_le32(0); | |
2528 | buf->ccontext.NameOffset = cpu_to_le16(offsetof | |
2529 | (struct crt_query_id_ctxt, Name)); | |
2530 | buf->ccontext.NameLength = cpu_to_le16(4); | |
2531 | /* SMB2_CREATE_QUERY_ON_DISK_ID is "QFid" */ | |
2532 | buf->Name[0] = 'Q'; | |
2533 | buf->Name[1] = 'F'; | |
2534 | buf->Name[2] = 'i'; | |
2535 | buf->Name[3] = 'd'; | |
2536 | return buf; | |
2537 | } | |
2538 | ||
2539 | /* See MS-SMB2 2.2.13.2.9 */ | |
2540 | static int | |
2541 | add_query_id_context(struct kvec *iov, unsigned int *num_iovec) | |
2542 | { | |
ff2a09e9 SF |
2543 | unsigned int num = *num_iovec; |
2544 | ||
2545 | iov[num].iov_base = create_query_id_buf(); | |
2546 | if (iov[num].iov_base == NULL) | |
2547 | return -ENOMEM; | |
2548 | iov[num].iov_len = sizeof(struct crt_query_id_ctxt); | |
ff2a09e9 SF |
2549 | *num_iovec = num + 1; |
2550 | return 0; | |
2551 | } | |
2552 | ||
f0712928 AA |
2553 | static int |
2554 | alloc_path_with_tree_prefix(__le16 **out_path, int *out_size, int *out_len, | |
2555 | const char *treename, const __le16 *path) | |
2556 | { | |
2557 | int treename_len, path_len; | |
2558 | struct nls_table *cp; | |
2559 | const __le16 sep[] = {cpu_to_le16('\\'), cpu_to_le16(0x0000)}; | |
2560 | ||
2561 | /* | |
2562 | * skip leading "\\" | |
2563 | */ | |
2564 | treename_len = strlen(treename); | |
2565 | if (treename_len < 2 || !(treename[0] == '\\' && treename[1] == '\\')) | |
2566 | return -EINVAL; | |
2567 | ||
2568 | treename += 2; | |
2569 | treename_len -= 2; | |
2570 | ||
2571 | path_len = UniStrnlen((wchar_t *)path, PATH_MAX); | |
2572 | ||
a1d2eb51 PA |
2573 | /* make room for one path separator only if @path isn't empty */ |
2574 | *out_len = treename_len + (path[0] ? 1 : 0) + path_len; | |
f0712928 AA |
2575 | |
2576 | /* | |
a1d2eb51 PA |
2577 | * final path needs to be 8-byte aligned as specified in |
2578 | * MS-SMB2 2.2.13 SMB2 CREATE Request. | |
f0712928 | 2579 | */ |
d7173623 | 2580 | *out_size = round_up(*out_len * sizeof(__le16), 8); |
a1d2eb51 | 2581 | *out_path = kzalloc(*out_size + sizeof(__le16) /* null */, GFP_KERNEL); |
f0712928 AA |
2582 | if (!*out_path) |
2583 | return -ENOMEM; | |
2584 | ||
2585 | cp = load_nls_default(); | |
2586 | cifs_strtoUTF16(*out_path, treename, treename_len, cp); | |
7eacba3b EK |
2587 | |
2588 | /* Do not append the separator if the path is empty */ | |
2589 | if (path[0] != cpu_to_le16(0x0000)) { | |
de548452 DDAG |
2590 | UniStrcat((wchar_t *)*out_path, (wchar_t *)sep); |
2591 | UniStrcat((wchar_t *)*out_path, (wchar_t *)path); | |
7eacba3b EK |
2592 | } |
2593 | ||
f0712928 AA |
2594 | unload_nls(cp); |
2595 | ||
2596 | return 0; | |
2597 | } | |
2598 | ||
bea851b8 SF |
2599 | int smb311_posix_mkdir(const unsigned int xid, struct inode *inode, |
2600 | umode_t mode, struct cifs_tcon *tcon, | |
2601 | const char *full_path, | |
2602 | struct cifs_sb_info *cifs_sb) | |
2603 | { | |
2604 | struct smb_rqst rqst; | |
2605 | struct smb2_create_req *req; | |
256b4c3f | 2606 | struct smb2_create_rsp *rsp = NULL; |
bea851b8 SF |
2607 | struct cifs_ses *ses = tcon->ses; |
2608 | struct kvec iov[3]; /* make sure at least one for each open context */ | |
2609 | struct kvec rsp_iov = {NULL, 0}; | |
2610 | int resp_buftype; | |
2611 | int uni_path_len; | |
2612 | __le16 *copy_path = NULL; | |
2613 | int copy_size; | |
2614 | int rc = 0; | |
2615 | unsigned int n_iov = 2; | |
2616 | __u32 file_attributes = 0; | |
2617 | char *pc_buf = NULL; | |
2618 | int flags = 0; | |
2619 | unsigned int total_len; | |
256b4c3f | 2620 | __le16 *utf16_path = NULL; |
352d96f3 | 2621 | struct TCP_Server_Info *server = cifs_pick_channel(ses); |
bea851b8 SF |
2622 | |
2623 | cifs_dbg(FYI, "mkdir\n"); | |
2624 | ||
256b4c3f AA |
2625 | /* resource #1: path allocation */ |
2626 | utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb); | |
2627 | if (!utf16_path) | |
2628 | return -ENOMEM; | |
2629 | ||
352d96f3 | 2630 | if (!ses || !server) { |
256b4c3f AA |
2631 | rc = -EIO; |
2632 | goto err_free_path; | |
2633 | } | |
bea851b8 | 2634 | |
256b4c3f | 2635 | /* resource #2: request */ |
352d96f3 AA |
2636 | rc = smb2_plain_req_init(SMB2_CREATE, tcon, server, |
2637 | (void **) &req, &total_len); | |
bea851b8 | 2638 | if (rc) |
256b4c3f AA |
2639 | goto err_free_path; |
2640 | ||
bea851b8 SF |
2641 | |
2642 | if (smb3_encryption_required(tcon)) | |
2643 | flags |= CIFS_TRANSFORM_REQ; | |
2644 | ||
bea851b8 SF |
2645 | req->ImpersonationLevel = IL_IMPERSONATION; |
2646 | req->DesiredAccess = cpu_to_le32(FILE_WRITE_ATTRIBUTES); | |
2647 | /* File attributes ignored on open (used in create though) */ | |
2648 | req->FileAttributes = cpu_to_le32(file_attributes); | |
2649 | req->ShareAccess = FILE_SHARE_ALL_LE; | |
2650 | req->CreateDisposition = cpu_to_le32(FILE_CREATE); | |
2651 | req->CreateOptions = cpu_to_le32(CREATE_NOT_FILE); | |
2652 | ||
2653 | iov[0].iov_base = (char *)req; | |
2654 | /* -1 since last byte is buf[0] which is sent below (path) */ | |
2655 | iov[0].iov_len = total_len - 1; | |
2656 | ||
2657 | req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req)); | |
2658 | ||
2659 | /* [MS-SMB2] 2.2.13 NameOffset: | |
2660 | * If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of | |
2661 | * the SMB2 header, the file name includes a prefix that will | |
2662 | * be processed during DFS name normalization as specified in | |
2663 | * section 3.3.5.9. Otherwise, the file name is relative to | |
2664 | * the share that is identified by the TreeId in the SMB2 | |
2665 | * header. | |
2666 | */ | |
2667 | if (tcon->share_flags & SHI1005_FLAGS_DFS) { | |
2668 | int name_len; | |
2669 | ||
0d35e382 | 2670 | req->hdr.Flags |= SMB2_FLAGS_DFS_OPERATIONS; |
bea851b8 SF |
2671 | rc = alloc_path_with_tree_prefix(©_path, ©_size, |
2672 | &name_len, | |
68e14569 | 2673 | tcon->tree_name, utf16_path); |
256b4c3f AA |
2674 | if (rc) |
2675 | goto err_free_req; | |
2676 | ||
bea851b8 SF |
2677 | req->NameLength = cpu_to_le16(name_len * 2); |
2678 | uni_path_len = copy_size; | |
256b4c3f AA |
2679 | /* free before overwriting resource */ |
2680 | kfree(utf16_path); | |
2681 | utf16_path = copy_path; | |
bea851b8 | 2682 | } else { |
256b4c3f | 2683 | uni_path_len = (2 * UniStrnlen((wchar_t *)utf16_path, PATH_MAX)) + 2; |
bea851b8 SF |
2684 | /* MUST set path len (NameLength) to 0 opening root of share */ |
2685 | req->NameLength = cpu_to_le16(uni_path_len - 2); | |
2686 | if (uni_path_len % 8 != 0) { | |
2687 | copy_size = roundup(uni_path_len, 8); | |
2688 | copy_path = kzalloc(copy_size, GFP_KERNEL); | |
2689 | if (!copy_path) { | |
256b4c3f AA |
2690 | rc = -ENOMEM; |
2691 | goto err_free_req; | |
bea851b8 | 2692 | } |
256b4c3f | 2693 | memcpy((char *)copy_path, (const char *)utf16_path, |
bea851b8 SF |
2694 | uni_path_len); |
2695 | uni_path_len = copy_size; | |
256b4c3f AA |
2696 | /* free before overwriting resource */ |
2697 | kfree(utf16_path); | |
2698 | utf16_path = copy_path; | |
bea851b8 SF |
2699 | } |
2700 | } | |
2701 | ||
2702 | iov[1].iov_len = uni_path_len; | |
256b4c3f | 2703 | iov[1].iov_base = utf16_path; |
bea851b8 SF |
2704 | req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_NONE; |
2705 | ||
2706 | if (tcon->posix_extensions) { | |
256b4c3f | 2707 | /* resource #3: posix buf */ |
bea851b8 | 2708 | rc = add_posix_context(iov, &n_iov, mode); |
256b4c3f AA |
2709 | if (rc) |
2710 | goto err_free_req; | |
5ec629e0 VL |
2711 | req->CreateContextsOffset = cpu_to_le32( |
2712 | sizeof(struct smb2_create_req) + | |
2713 | iov[1].iov_len); | |
bea851b8 SF |
2714 | pc_buf = iov[n_iov-1].iov_base; |
2715 | } | |
2716 | ||
2717 | ||
2718 | memset(&rqst, 0, sizeof(struct smb_rqst)); | |
2719 | rqst.rq_iov = iov; | |
2720 | rqst.rq_nvec = n_iov; | |
2721 | ||
d2f15428 | 2722 | /* no need to inc num_remote_opens because we close it just below */ |
fddc6ccc | 2723 | trace_smb3_posix_mkdir_enter(xid, tcon->tid, ses->Suid, full_path, CREATE_NOT_FILE, |
efe2e9f3 | 2724 | FILE_WRITE_ATTRIBUTES); |
256b4c3f | 2725 | /* resource #4: response buffer */ |
352d96f3 AA |
2726 | rc = cifs_send_recv(xid, ses, server, |
2727 | &rqst, &resp_buftype, flags, &rsp_iov); | |
256b4c3f | 2728 | if (rc) { |
bea851b8 SF |
2729 | cifs_stats_fail_inc(tcon, SMB2_CREATE_HE); |
2730 | trace_smb3_posix_mkdir_err(xid, tcon->tid, ses->Suid, | |
256b4c3f AA |
2731 | CREATE_NOT_FILE, |
2732 | FILE_WRITE_ATTRIBUTES, rc); | |
2733 | goto err_free_rsp_buf; | |
2734 | } | |
2735 | ||
ca780da5 SF |
2736 | /* |
2737 | * Although unlikely to be possible for rsp to be null and rc not set, | |
2738 | * adding check below is slightly safer long term (and quiets Coverity | |
2739 | * warning) | |
2740 | */ | |
256b4c3f | 2741 | rsp = (struct smb2_create_rsp *)rsp_iov.iov_base; |
ca780da5 SF |
2742 | if (rsp == NULL) { |
2743 | rc = -EIO; | |
2744 | kfree(pc_buf); | |
2745 | goto err_free_req; | |
2746 | } | |
2747 | ||
351a59da PA |
2748 | trace_smb3_posix_mkdir_done(xid, rsp->PersistentFileId, tcon->tid, ses->Suid, |
2749 | CREATE_NOT_FILE, FILE_WRITE_ATTRIBUTES); | |
bea851b8 | 2750 | |
351a59da | 2751 | SMB2_close(xid, tcon, rsp->PersistentFileId, rsp->VolatileFileId); |
bea851b8 SF |
2752 | |
2753 | /* Eventually save off posix specific response info and timestaps */ | |
2754 | ||
256b4c3f | 2755 | err_free_rsp_buf: |
bea851b8 | 2756 | free_rsp_buf(resp_buftype, rsp); |
256b4c3f AA |
2757 | kfree(pc_buf); |
2758 | err_free_req: | |
2759 | cifs_small_buf_release(req); | |
2760 | err_free_path: | |
2761 | kfree(utf16_path); | |
bea851b8 | 2762 | return rc; |
bea851b8 | 2763 | } |
bea851b8 | 2764 | |
2503a0db | 2765 | int |
352d96f3 AA |
2766 | SMB2_open_init(struct cifs_tcon *tcon, struct TCP_Server_Info *server, |
2767 | struct smb_rqst *rqst, __u8 *oplock, | |
1eb9fb52 | 2768 | struct cifs_open_parms *oparms, __le16 *path) |
2503a0db PS |
2769 | { |
2770 | struct smb2_create_req *req; | |
da502f7d | 2771 | unsigned int n_iov = 2; |
ca81983f | 2772 | __u32 file_attributes = 0; |
1eb9fb52 RS |
2773 | int copy_size; |
2774 | int uni_path_len; | |
4f33bc35 | 2775 | unsigned int total_len; |
1eb9fb52 RS |
2776 | struct kvec *iov = rqst->rq_iov; |
2777 | __le16 *copy_path; | |
2778 | int rc; | |
2503a0db | 2779 | |
352d96f3 AA |
2780 | rc = smb2_plain_req_init(SMB2_CREATE, tcon, server, |
2781 | (void **) &req, &total_len); | |
2503a0db PS |
2782 | if (rc) |
2783 | return rc; | |
2784 | ||
1eb9fb52 RS |
2785 | iov[0].iov_base = (char *)req; |
2786 | /* -1 since last byte is buf[0] which is sent below (path) */ | |
2787 | iov[0].iov_len = total_len - 1; | |
7fb8986e | 2788 | |
064f6047 | 2789 | if (oparms->create_options & CREATE_OPTION_READONLY) |
ca81983f | 2790 | file_attributes |= ATTR_READONLY; |
db8b631d SF |
2791 | if (oparms->create_options & CREATE_OPTION_SPECIAL) |
2792 | file_attributes |= ATTR_SYSTEM; | |
ca81983f | 2793 | |
2503a0db | 2794 | req->ImpersonationLevel = IL_IMPERSONATION; |
064f6047 | 2795 | req->DesiredAccess = cpu_to_le32(oparms->desired_access); |
2503a0db PS |
2796 | /* File attributes ignored on open (used in create though) */ |
2797 | req->FileAttributes = cpu_to_le32(file_attributes); | |
2798 | req->ShareAccess = FILE_SHARE_ALL_LE; | |
c3ca78e2 | 2799 | |
064f6047 PS |
2800 | req->CreateDisposition = cpu_to_le32(oparms->disposition); |
2801 | req->CreateOptions = cpu_to_le32(oparms->create_options & CREATE_OPTIONS_MASK); | |
4f33bc35 | 2802 | req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req)); |
f0712928 AA |
2803 | |
2804 | /* [MS-SMB2] 2.2.13 NameOffset: | |
2805 | * If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of | |
2806 | * the SMB2 header, the file name includes a prefix that will | |
2807 | * be processed during DFS name normalization as specified in | |
2808 | * section 3.3.5.9. Otherwise, the file name is relative to | |
2809 | * the share that is identified by the TreeId in the SMB2 | |
2810 | * header. | |
2811 | */ | |
2812 | if (tcon->share_flags & SHI1005_FLAGS_DFS) { | |
2813 | int name_len; | |
2814 | ||
0d35e382 | 2815 | req->hdr.Flags |= SMB2_FLAGS_DFS_OPERATIONS; |
f0712928 AA |
2816 | rc = alloc_path_with_tree_prefix(©_path, ©_size, |
2817 | &name_len, | |
68e14569 | 2818 | tcon->tree_name, path); |
1eb9fb52 | 2819 | if (rc) |
f0712928 AA |
2820 | return rc; |
2821 | req->NameLength = cpu_to_le16(name_len * 2); | |
59aa3718 PS |
2822 | uni_path_len = copy_size; |
2823 | path = copy_path; | |
f0712928 AA |
2824 | } else { |
2825 | uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2; | |
2826 | /* MUST set path len (NameLength) to 0 opening root of share */ | |
2827 | req->NameLength = cpu_to_le16(uni_path_len - 2); | |
d7173623 | 2828 | copy_size = round_up(uni_path_len, 8); |
1eb9fb52 RS |
2829 | copy_path = kzalloc(copy_size, GFP_KERNEL); |
2830 | if (!copy_path) | |
2831 | return -ENOMEM; | |
2832 | memcpy((char *)copy_path, (const char *)path, | |
2833 | uni_path_len); | |
2834 | uni_path_len = copy_size; | |
2835 | path = copy_path; | |
2503a0db PS |
2836 | } |
2837 | ||
59aa3718 PS |
2838 | iov[1].iov_len = uni_path_len; |
2839 | iov[1].iov_base = path; | |
59aa3718 | 2840 | |
3e7a02d4 | 2841 | if ((!server->oplocks) || (tcon->no_lease)) |
b8c32dbb PS |
2842 | *oplock = SMB2_OPLOCK_LEVEL_NONE; |
2843 | ||
a41a28bd | 2844 | if (!(server->capabilities & SMB2_GLOBAL_CAP_LEASING) || |
b8c32dbb PS |
2845 | *oplock == SMB2_OPLOCK_LEVEL_NONE) |
2846 | req->RequestedOplockLevel = *oplock; | |
f8015683 SF |
2847 | else if (!(server->capabilities & SMB2_GLOBAL_CAP_DIRECTORY_LEASING) && |
2848 | (oparms->create_options & CREATE_NOT_FILE)) | |
2849 | req->RequestedOplockLevel = *oplock; /* no srv lease support */ | |
b8c32dbb | 2850 | else { |
919e57c3 | 2851 | rc = add_lease_context(server, req, iov, &n_iov, |
729c0c9d | 2852 | oparms->fid->lease_key, oplock); |
1eb9fb52 | 2853 | if (rc) |
d22cbfec | 2854 | return rc; |
b8c32dbb PS |
2855 | } |
2856 | ||
63eb3def | 2857 | if (*oplock == SMB2_OPLOCK_LEVEL_BATCH) { |
da502f7d | 2858 | rc = add_durable_context(iov, &n_iov, oparms, |
b56eae4d | 2859 | tcon->use_persistent); |
1eb9fb52 | 2860 | if (rc) |
63eb3def | 2861 | return rc; |
63eb3def PS |
2862 | } |
2863 | ||
ce558b0e | 2864 | if (tcon->posix_extensions) { |
ce558b0e | 2865 | rc = add_posix_context(iov, &n_iov, oparms->mode); |
1eb9fb52 | 2866 | if (rc) |
ce558b0e | 2867 | return rc; |
ce558b0e | 2868 | } |
ce558b0e | 2869 | |
cdeaf9d0 SF |
2870 | if (tcon->snapshot_time) { |
2871 | cifs_dbg(FYI, "adding snapshot context\n"); | |
cdeaf9d0 SF |
2872 | rc = add_twarp_context(iov, &n_iov, tcon->snapshot_time); |
2873 | if (rc) | |
2874 | return rc; | |
2875 | } | |
2876 | ||
975221ec SF |
2877 | if ((oparms->disposition != FILE_OPEN) && (oparms->cifs_sb)) { |
2878 | bool set_mode; | |
2879 | bool set_owner; | |
2880 | ||
2881 | if ((oparms->cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID) && | |
2882 | (oparms->mode != ACL_NO_MODE)) | |
2883 | set_mode = true; | |
2884 | else { | |
2885 | set_mode = false; | |
2886 | oparms->mode = ACL_NO_MODE; | |
c3ca78e2 SF |
2887 | } |
2888 | ||
975221ec SF |
2889 | if (oparms->cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UID_FROM_ACL) |
2890 | set_owner = true; | |
2891 | else | |
2892 | set_owner = false; | |
2893 | ||
2894 | if (set_owner | set_mode) { | |
975221ec SF |
2895 | cifs_dbg(FYI, "add sd with mode 0x%x\n", oparms->mode); |
2896 | rc = add_sd_context(iov, &n_iov, oparms->mode, set_owner); | |
2897 | if (rc) | |
2898 | return rc; | |
2899 | } | |
c3ca78e2 SF |
2900 | } |
2901 | ||
ff2a09e9 | 2902 | add_query_id_context(iov, &n_iov); |
cdeaf9d0 | 2903 | |
5ec629e0 VL |
2904 | if (n_iov > 2) { |
2905 | /* | |
2906 | * We have create contexts behind iov[1] (the file | |
2907 | * name), point at them from the main create request | |
2908 | */ | |
2909 | req->CreateContextsOffset = cpu_to_le32( | |
2910 | sizeof(struct smb2_create_req) + | |
2911 | iov[1].iov_len); | |
d2ec43b5 | 2912 | req->CreateContextsLength = 0; |
2a8d1387 VL |
2913 | |
2914 | for (unsigned int i = 2; i < (n_iov-1); i++) { | |
2915 | struct kvec *v = &iov[i]; | |
2916 | size_t len = v->iov_len; | |
2917 | struct create_context *cctx = | |
2918 | (struct create_context *)v->iov_base; | |
2919 | ||
2920 | cctx->Next = cpu_to_le32(len); | |
d2ec43b5 | 2921 | le32_add_cpu(&req->CreateContextsLength, len); |
2a8d1387 | 2922 | } |
d2ec43b5 VL |
2923 | le32_add_cpu(&req->CreateContextsLength, |
2924 | iov[n_iov-1].iov_len); | |
5ec629e0 VL |
2925 | } |
2926 | ||
1eb9fb52 RS |
2927 | rqst->rq_nvec = n_iov; |
2928 | return 0; | |
2929 | } | |
2930 | ||
2931 | /* rq_iov[0] is the request and is released by cifs_small_buf_release(). | |
2932 | * All other vectors are freed by kfree(). | |
2933 | */ | |
2934 | void | |
2935 | SMB2_open_free(struct smb_rqst *rqst) | |
2936 | { | |
2937 | int i; | |
2938 | ||
32a1fb36 RS |
2939 | if (rqst && rqst->rq_iov) { |
2940 | cifs_small_buf_release(rqst->rq_iov[0].iov_base); | |
2941 | for (i = 1; i < rqst->rq_nvec; i++) | |
2942 | if (rqst->rq_iov[i].iov_base != smb2_padding) | |
2943 | kfree(rqst->rq_iov[i].iov_base); | |
2944 | } | |
1eb9fb52 RS |
2945 | } |
2946 | ||
2947 | int | |
2948 | SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path, | |
2949 | __u8 *oplock, struct smb2_file_all_info *buf, | |
69dda305 | 2950 | struct create_posix_rsp *posix, |
1eb9fb52 RS |
2951 | struct kvec *err_iov, int *buftype) |
2952 | { | |
2953 | struct smb_rqst rqst; | |
2954 | struct smb2_create_rsp *rsp = NULL; | |
1eb9fb52 RS |
2955 | struct cifs_tcon *tcon = oparms->tcon; |
2956 | struct cifs_ses *ses = tcon->ses; | |
352d96f3 | 2957 | struct TCP_Server_Info *server = cifs_pick_channel(ses); |
4d8dfafc | 2958 | struct kvec iov[SMB2_CREATE_IOV_SIZE]; |
1eb9fb52 | 2959 | struct kvec rsp_iov = {NULL, 0}; |
ef2298a0 | 2960 | int resp_buftype = CIFS_NO_BUFFER; |
1eb9fb52 RS |
2961 | int rc = 0; |
2962 | int flags = 0; | |
2963 | ||
2964 | cifs_dbg(FYI, "create/open\n"); | |
352d96f3 | 2965 | if (!ses || !server) |
1eb9fb52 RS |
2966 | return -EIO; |
2967 | ||
2968 | if (smb3_encryption_required(tcon)) | |
2969 | flags |= CIFS_TRANSFORM_REQ; | |
2970 | ||
40eff45b | 2971 | memset(&rqst, 0, sizeof(struct smb_rqst)); |
1eb9fb52 | 2972 | memset(&iov, 0, sizeof(iov)); |
40eff45b | 2973 | rqst.rq_iov = iov; |
4d8dfafc | 2974 | rqst.rq_nvec = SMB2_CREATE_IOV_SIZE; |
1eb9fb52 | 2975 | |
352d96f3 AA |
2976 | rc = SMB2_open_init(tcon, server, |
2977 | &rqst, oplock, oparms, path); | |
1eb9fb52 RS |
2978 | if (rc) |
2979 | goto creat_exit; | |
40eff45b | 2980 | |
fddc6ccc | 2981 | trace_smb3_open_enter(xid, tcon->tid, tcon->ses->Suid, oparms->path, |
efe2e9f3 SF |
2982 | oparms->create_options, oparms->desired_access); |
2983 | ||
352d96f3 AA |
2984 | rc = cifs_send_recv(xid, ses, server, |
2985 | &rqst, &resp_buftype, flags, | |
4f33bc35 | 2986 | &rsp_iov); |
da502f7d | 2987 | rsp = (struct smb2_create_rsp *)rsp_iov.iov_base; |
2503a0db PS |
2988 | |
2989 | if (rc != 0) { | |
2990 | cifs_stats_fail_inc(tcon, SMB2_CREATE_HE); | |
91cb74f5 RS |
2991 | if (err_iov && rsp) { |
2992 | *err_iov = rsp_iov; | |
9d874c36 | 2993 | *buftype = resp_buftype; |
91cb74f5 RS |
2994 | resp_buftype = CIFS_NO_BUFFER; |
2995 | rsp = NULL; | |
2996 | } | |
28d59363 SF |
2997 | trace_smb3_open_err(xid, tcon->tid, ses->Suid, |
2998 | oparms->create_options, oparms->desired_access, rc); | |
7dcc82c2 | 2999 | if (rc == -EREMCHG) { |
a0a3036b | 3000 | pr_warn_once("server share %s deleted\n", |
68e14569 | 3001 | tcon->tree_name); |
7dcc82c2 SF |
3002 | tcon->need_reconnect = true; |
3003 | } | |
2503a0db | 3004 | goto creat_exit; |
6b789518 SF |
3005 | } else if (rsp == NULL) /* unlikely to happen, but safer to check */ |
3006 | goto creat_exit; | |
3007 | else | |
351a59da PA |
3008 | trace_smb3_open_done(xid, rsp->PersistentFileId, tcon->tid, ses->Suid, |
3009 | oparms->create_options, oparms->desired_access); | |
2503a0db | 3010 | |
fae8044c | 3011 | atomic_inc(&tcon->num_remote_opens); |
351a59da PA |
3012 | oparms->fid->persistent_fid = rsp->PersistentFileId; |
3013 | oparms->fid->volatile_fid = rsp->VolatileFileId; | |
86f740f2 | 3014 | oparms->fid->access = oparms->desired_access; |
dfe33f9a | 3015 | #ifdef CONFIG_CIFS_DEBUG2 |
0d35e382 | 3016 | oparms->fid->mid = le64_to_cpu(rsp->hdr.MessageId); |
dfe33f9a | 3017 | #endif /* CIFS_DEBUG2 */ |
f0df737e PS |
3018 | |
3019 | if (buf) { | |
fbcff33d KC |
3020 | buf->CreationTime = rsp->CreationTime; |
3021 | buf->LastAccessTime = rsp->LastAccessTime; | |
3022 | buf->LastWriteTime = rsp->LastWriteTime; | |
3023 | buf->ChangeTime = rsp->ChangeTime; | |
f0df737e PS |
3024 | buf->AllocationSize = rsp->AllocationSize; |
3025 | buf->EndOfFile = rsp->EndofFile; | |
3026 | buf->Attributes = rsp->FileAttributes; | |
3027 | buf->NumberOfLinks = cpu_to_le32(1); | |
3028 | buf->DeletePending = 0; | |
3029 | } | |
2e44b288 | 3030 | |
89a5bfa3 SF |
3031 | |
3032 | smb2_parse_contexts(server, rsp, &oparms->fid->epoch, | |
69dda305 | 3033 | oparms->fid->lease_key, oplock, buf, posix); |
2503a0db | 3034 | creat_exit: |
1eb9fb52 | 3035 | SMB2_open_free(&rqst); |
2503a0db PS |
3036 | free_rsp_buf(resp_buftype, rsp); |
3037 | return rc; | |
3038 | } | |
3039 | ||
4a72dafa | 3040 | int |
352d96f3 AA |
3041 | SMB2_ioctl_init(struct cifs_tcon *tcon, struct TCP_Server_Info *server, |
3042 | struct smb_rqst *rqst, | |
ccdc77a3 | 3043 | u64 persistent_fid, u64 volatile_fid, u32 opcode, |
400d0ad6 | 3044 | char *in_data, u32 indatalen, |
153322f7 | 3045 | __u32 max_response_size) |
4a72dafa SF |
3046 | { |
3047 | struct smb2_ioctl_req *req; | |
ccdc77a3 | 3048 | struct kvec *iov = rqst->rq_iov; |
97754680 | 3049 | unsigned int total_len; |
ccdc77a3 | 3050 | int rc; |
2c87d6a9 | 3051 | char *in_data_buf; |
4a72dafa | 3052 | |
352d96f3 AA |
3053 | rc = smb2_ioctl_req_init(opcode, tcon, server, |
3054 | (void **) &req, &total_len); | |
4a72dafa SF |
3055 | if (rc) |
3056 | return rc; | |
3057 | ||
2c87d6a9 LL |
3058 | if (indatalen) { |
3059 | /* | |
3060 | * indatalen is usually small at a couple of bytes max, so | |
3061 | * just allocate through generic pool | |
3062 | */ | |
d81f0974 | 3063 | in_data_buf = kmemdup(in_data, indatalen, GFP_NOFS); |
2c87d6a9 LL |
3064 | if (!in_data_buf) { |
3065 | cifs_small_buf_release(req); | |
3066 | return -ENOMEM; | |
3067 | } | |
2c87d6a9 LL |
3068 | } |
3069 | ||
4a72dafa SF |
3070 | req->CtlCode = cpu_to_le32(opcode); |
3071 | req->PersistentFileId = persistent_fid; | |
3072 | req->VolatileFileId = volatile_fid; | |
3073 | ||
ccdc77a3 RS |
3074 | iov[0].iov_base = (char *)req; |
3075 | /* | |
3076 | * If no input data, the size of ioctl struct in | |
3077 | * protocol spec still includes a 1 byte data buffer, | |
3078 | * but if input data passed to ioctl, we do not | |
3079 | * want to double count this, so we do not send | |
3080 | * the dummy one byte of data in iovec[0] if sending | |
3081 | * input data (in iovec[1]). | |
3082 | */ | |
4a72dafa SF |
3083 | if (indatalen) { |
3084 | req->InputCount = cpu_to_le32(indatalen); | |
3085 | /* do not set InputOffset if no input data */ | |
3086 | req->InputOffset = | |
97754680 | 3087 | cpu_to_le32(offsetof(struct smb2_ioctl_req, Buffer)); |
ccdc77a3 RS |
3088 | rqst->rq_nvec = 2; |
3089 | iov[0].iov_len = total_len - 1; | |
2c87d6a9 | 3090 | iov[1].iov_base = in_data_buf; |
4a72dafa | 3091 | iov[1].iov_len = indatalen; |
ccdc77a3 RS |
3092 | } else { |
3093 | rqst->rq_nvec = 1; | |
3094 | iov[0].iov_len = total_len; | |
3095 | } | |
4a72dafa SF |
3096 | |
3097 | req->OutputOffset = 0; | |
3098 | req->OutputCount = 0; /* MBZ */ | |
3099 | ||
3100 | /* | |
153322f7 SF |
3101 | * In most cases max_response_size is set to 16K (CIFSMaxBufSize) |
3102 | * We Could increase default MaxOutputResponse, but that could require | |
3103 | * more credits. Windows typically sets this smaller, but for some | |
4a72dafa SF |
3104 | * ioctls it may be useful to allow server to send more. No point |
3105 | * limiting what the server can send as long as fits in one credit | |
153322f7 SF |
3106 | * We can not handle more than CIFS_MAX_BUF_SIZE yet but may want |
3107 | * to increase this limit up in the future. | |
3108 | * Note that for snapshot queries that servers like Azure expect that | |
3109 | * the first query be minimal size (and just used to get the number/size | |
3110 | * of previous versions) so response size must be specified as EXACTLY | |
3111 | * sizeof(struct snapshot_array) which is 16 when rounded up to multiple | |
3112 | * of eight bytes. Currently that is the only case where we set max | |
3113 | * response size smaller. | |
4a72dafa | 3114 | */ |
153322f7 | 3115 | req->MaxOutputResponse = cpu_to_le32(max_response_size); |
0d35e382 | 3116 | req->hdr.CreditCharge = |
ebf57440 NJ |
3117 | cpu_to_le16(DIV_ROUND_UP(max(indatalen, max_response_size), |
3118 | SMB2_MAX_BUFFER_SIZE)); | |
400d0ad6 EM |
3119 | /* always an FSCTL (for now) */ |
3120 | req->Flags = cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL); | |
4a72dafa | 3121 | |
4587eee0 SF |
3122 | /* validate negotiate request must be signed - see MS-SMB2 3.2.5.5 */ |
3123 | if (opcode == FSCTL_VALIDATE_NEGOTIATE_INFO) | |
0d35e382 | 3124 | req->hdr.Flags |= SMB2_FLAGS_SIGNED; |
4a72dafa | 3125 | |
ccdc77a3 RS |
3126 | return 0; |
3127 | } | |
3128 | ||
3129 | void | |
3130 | SMB2_ioctl_free(struct smb_rqst *rqst) | |
3131 | { | |
6457c20e | 3132 | int i; |
2c75426c | 3133 | |
2c87d6a9 | 3134 | if (rqst && rqst->rq_iov) { |
ccdc77a3 | 3135 | cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */ |
6457c20e MZ |
3136 | for (i = 1; i < rqst->rq_nvec; i++) |
3137 | if (rqst->rq_iov[i].iov_base != smb2_padding) | |
3138 | kfree(rqst->rq_iov[i].iov_base); | |
2c87d6a9 | 3139 | } |
ccdc77a3 RS |
3140 | } |
3141 | ||
153322f7 | 3142 | |
ccdc77a3 RS |
3143 | /* |
3144 | * SMB2 IOCTL is used for both IOCTLs and FSCTLs | |
3145 | */ | |
3146 | int | |
3147 | SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, | |
400d0ad6 EM |
3148 | u64 volatile_fid, u32 opcode, char *in_data, u32 indatalen, |
3149 | u32 max_out_data_len, char **out_data, | |
3150 | u32 *plen /* returned data len */) | |
ccdc77a3 RS |
3151 | { |
3152 | struct smb_rqst rqst; | |
3153 | struct smb2_ioctl_rsp *rsp = NULL; | |
3154 | struct cifs_ses *ses; | |
352d96f3 | 3155 | struct TCP_Server_Info *server; |
72c419d9 | 3156 | struct kvec iov[SMB2_IOCTL_IOV_SIZE]; |
ccdc77a3 RS |
3157 | struct kvec rsp_iov = {NULL, 0}; |
3158 | int resp_buftype = CIFS_NO_BUFFER; | |
3159 | int rc = 0; | |
3160 | int flags = 0; | |
3161 | ||
3162 | cifs_dbg(FYI, "SMB2 IOCTL\n"); | |
3163 | ||
3164 | if (out_data != NULL) | |
3165 | *out_data = NULL; | |
3166 | ||
3167 | /* zero out returned data len, in case of error */ | |
3168 | if (plen) | |
3169 | *plen = 0; | |
3170 | ||
352d96f3 | 3171 | if (!tcon) |
ccdc77a3 RS |
3172 | return -EIO; |
3173 | ||
352d96f3 | 3174 | ses = tcon->ses; |
ac6ad7a8 CIK |
3175 | if (!ses) |
3176 | return -EIO; | |
352d96f3 AA |
3177 | |
3178 | server = cifs_pick_channel(ses); | |
ac6ad7a8 | 3179 | if (!server) |
ccdc77a3 RS |
3180 | return -EIO; |
3181 | ||
3182 | if (smb3_encryption_required(tcon)) | |
3183 | flags |= CIFS_TRANSFORM_REQ; | |
3184 | ||
40eff45b | 3185 | memset(&rqst, 0, sizeof(struct smb_rqst)); |
ccdc77a3 | 3186 | memset(&iov, 0, sizeof(iov)); |
40eff45b | 3187 | rqst.rq_iov = iov; |
72c419d9 | 3188 | rqst.rq_nvec = SMB2_IOCTL_IOV_SIZE; |
ccdc77a3 | 3189 | |
352d96f3 AA |
3190 | rc = SMB2_ioctl_init(tcon, server, |
3191 | &rqst, persistent_fid, volatile_fid, opcode, | |
400d0ad6 | 3192 | in_data, indatalen, max_out_data_len); |
ccdc77a3 RS |
3193 | if (rc) |
3194 | goto ioctl_exit; | |
40eff45b | 3195 | |
352d96f3 AA |
3196 | rc = cifs_send_recv(xid, ses, server, |
3197 | &rqst, &resp_buftype, flags, | |
97754680 | 3198 | &rsp_iov); |
da502f7d | 3199 | rsp = (struct smb2_ioctl_rsp *)rsp_iov.iov_base; |
4a72dafa | 3200 | |
eccb4422 SF |
3201 | if (rc != 0) |
3202 | trace_smb3_fsctl_err(xid, persistent_fid, tcon->tid, | |
3203 | ses->Suid, 0, opcode, rc); | |
3204 | ||
2f3ebaba | 3205 | if ((rc != 0) && (rc != -EINVAL) && (rc != -E2BIG)) { |
8e353106 | 3206 | cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE); |
4a72dafa | 3207 | goto ioctl_exit; |
9bf0c9cd SF |
3208 | } else if (rc == -EINVAL) { |
3209 | if ((opcode != FSCTL_SRV_COPYCHUNK_WRITE) && | |
3210 | (opcode != FSCTL_SRV_COPYCHUNK)) { | |
8e353106 | 3211 | cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE); |
9bf0c9cd SF |
3212 | goto ioctl_exit; |
3213 | } | |
2f3ebaba RS |
3214 | } else if (rc == -E2BIG) { |
3215 | if (opcode != FSCTL_QUERY_ALLOCATED_RANGES) { | |
3216 | cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE); | |
3217 | goto ioctl_exit; | |
3218 | } | |
4a72dafa SF |
3219 | } |
3220 | ||
3221 | /* check if caller wants to look at return data or just return rc */ | |
3222 | if ((plen == NULL) || (out_data == NULL)) | |
3223 | goto ioctl_exit; | |
3224 | ||
4d9beec2 SF |
3225 | /* |
3226 | * Although unlikely to be possible for rsp to be null and rc not set, | |
3227 | * adding check below is slightly safer long term (and quiets Coverity | |
3228 | * warning) | |
3229 | */ | |
3230 | if (rsp == NULL) { | |
3231 | rc = -EIO; | |
3232 | goto ioctl_exit; | |
3233 | } | |
3234 | ||
4a72dafa SF |
3235 | *plen = le32_to_cpu(rsp->OutputCount); |
3236 | ||
3237 | /* We check for obvious errors in the output buffer length and offset */ | |
3238 | if (*plen == 0) | |
3239 | goto ioctl_exit; /* server returned no data */ | |
2d204ee9 | 3240 | else if (*plen > rsp_iov.iov_len || *plen > 0xFF00) { |
3175eb9b | 3241 | cifs_tcon_dbg(VFS, "srv returned invalid ioctl length: %d\n", *plen); |
4a72dafa SF |
3242 | *plen = 0; |
3243 | rc = -EIO; | |
3244 | goto ioctl_exit; | |
3245 | } | |
3246 | ||
2d204ee9 | 3247 | if (rsp_iov.iov_len - *plen < le32_to_cpu(rsp->OutputOffset)) { |
3175eb9b | 3248 | cifs_tcon_dbg(VFS, "Malformed ioctl resp: len %d offset %d\n", *plen, |
4a72dafa SF |
3249 | le32_to_cpu(rsp->OutputOffset)); |
3250 | *plen = 0; | |
3251 | rc = -EIO; | |
3252 | goto ioctl_exit; | |
3253 | } | |
3254 | ||
d034feeb Y |
3255 | *out_data = kmemdup((char *)rsp + le32_to_cpu(rsp->OutputOffset), |
3256 | *plen, GFP_KERNEL); | |
4a72dafa SF |
3257 | if (*out_data == NULL) { |
3258 | rc = -ENOMEM; | |
3259 | goto ioctl_exit; | |
3260 | } | |
3261 | ||
4a72dafa | 3262 | ioctl_exit: |
ccdc77a3 | 3263 | SMB2_ioctl_free(&rqst); |
4a72dafa SF |
3264 | free_rsp_buf(resp_buftype, rsp); |
3265 | return rc; | |
3266 | } | |
3267 | ||
64a5cfa6 SF |
3268 | /* |
3269 | * Individual callers to ioctl worker function follow | |
3270 | */ | |
3271 | ||
3272 | int | |
3273 | SMB2_set_compression(const unsigned int xid, struct cifs_tcon *tcon, | |
3274 | u64 persistent_fid, u64 volatile_fid) | |
3275 | { | |
3276 | int rc; | |
64a5cfa6 SF |
3277 | struct compress_ioctl fsctl_input; |
3278 | char *ret_data = NULL; | |
3279 | ||
3280 | fsctl_input.CompressionState = | |
bc09d141 | 3281 | cpu_to_le16(COMPRESSION_FORMAT_DEFAULT); |
64a5cfa6 SF |
3282 | |
3283 | rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid, | |
400d0ad6 | 3284 | FSCTL_SET_COMPRESSION, |
64a5cfa6 | 3285 | (char *)&fsctl_input /* data input */, |
153322f7 SF |
3286 | 2 /* in data len */, CIFSMaxBufSize /* max out data */, |
3287 | &ret_data /* out data */, NULL); | |
64a5cfa6 SF |
3288 | |
3289 | cifs_dbg(FYI, "set compression rc %d\n", rc); | |
64a5cfa6 SF |
3290 | |
3291 | return rc; | |
3292 | } | |
3293 | ||
8eb4ecfa | 3294 | int |
352d96f3 AA |
3295 | SMB2_close_init(struct cifs_tcon *tcon, struct TCP_Server_Info *server, |
3296 | struct smb_rqst *rqst, | |
43f8a6a7 | 3297 | u64 persistent_fid, u64 volatile_fid, bool query_attrs) |
8eb4ecfa RS |
3298 | { |
3299 | struct smb2_close_req *req; | |
3300 | struct kvec *iov = rqst->rq_iov; | |
3301 | unsigned int total_len; | |
3302 | int rc; | |
3303 | ||
352d96f3 AA |
3304 | rc = smb2_plain_req_init(SMB2_CLOSE, tcon, server, |
3305 | (void **) &req, &total_len); | |
8eb4ecfa RS |
3306 | if (rc) |
3307 | return rc; | |
3308 | ||
351a59da PA |
3309 | req->PersistentFileId = persistent_fid; |
3310 | req->VolatileFileId = volatile_fid; | |
43f8a6a7 SF |
3311 | if (query_attrs) |
3312 | req->Flags = SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB; | |
3313 | else | |
3314 | req->Flags = 0; | |
8eb4ecfa RS |
3315 | iov[0].iov_base = (char *)req; |
3316 | iov[0].iov_len = total_len; | |
3317 | ||
3318 | return 0; | |
3319 | } | |
3320 | ||
3321 | void | |
3322 | SMB2_close_free(struct smb_rqst *rqst) | |
3323 | { | |
32a1fb36 RS |
3324 | if (rqst && rqst->rq_iov) |
3325 | cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */ | |
8eb4ecfa RS |
3326 | } |
3327 | ||
2503a0db | 3328 | int |
43f8a6a7 SF |
3329 | __SMB2_close(const unsigned int xid, struct cifs_tcon *tcon, |
3330 | u64 persistent_fid, u64 volatile_fid, | |
3331 | struct smb2_file_network_open_info *pbuf) | |
2503a0db | 3332 | { |
40eff45b | 3333 | struct smb_rqst rqst; |
8eb4ecfa | 3334 | struct smb2_close_rsp *rsp = NULL; |
2503a0db | 3335 | struct cifs_ses *ses = tcon->ses; |
352d96f3 | 3336 | struct TCP_Server_Info *server = cifs_pick_channel(ses); |
2503a0db | 3337 | struct kvec iov[1]; |
da502f7d | 3338 | struct kvec rsp_iov; |
ef2298a0 | 3339 | int resp_buftype = CIFS_NO_BUFFER; |
2503a0db | 3340 | int rc = 0; |
9e8fae25 | 3341 | int flags = 0; |
43f8a6a7 | 3342 | bool query_attrs = false; |
2503a0db | 3343 | |
f96637be | 3344 | cifs_dbg(FYI, "Close\n"); |
2503a0db | 3345 | |
352d96f3 | 3346 | if (!ses || !server) |
2503a0db PS |
3347 | return -EIO; |
3348 | ||
5a77e75f | 3349 | if (smb3_encryption_required(tcon)) |
7fb8986e PS |
3350 | flags |= CIFS_TRANSFORM_REQ; |
3351 | ||
40eff45b | 3352 | memset(&rqst, 0, sizeof(struct smb_rqst)); |
8eb4ecfa | 3353 | memset(&iov, 0, sizeof(iov)); |
40eff45b RS |
3354 | rqst.rq_iov = iov; |
3355 | rqst.rq_nvec = 1; | |
3356 | ||
43f8a6a7 SF |
3357 | /* check if need to ask server to return timestamps in close response */ |
3358 | if (pbuf) | |
3359 | query_attrs = true; | |
3360 | ||
f90f9797 | 3361 | trace_smb3_close_enter(xid, persistent_fid, tcon->tid, ses->Suid); |
352d96f3 AA |
3362 | rc = SMB2_close_init(tcon, server, |
3363 | &rqst, persistent_fid, volatile_fid, | |
43f8a6a7 | 3364 | query_attrs); |
8eb4ecfa RS |
3365 | if (rc) |
3366 | goto close_exit; | |
3367 | ||
352d96f3 AA |
3368 | rc = cifs_send_recv(xid, ses, server, |
3369 | &rqst, &resp_buftype, flags, &rsp_iov); | |
da502f7d | 3370 | rsp = (struct smb2_close_rsp *)rsp_iov.iov_base; |
2503a0db PS |
3371 | |
3372 | if (rc != 0) { | |
d4a029d2 | 3373 | cifs_stats_fail_inc(tcon, SMB2_CLOSE_HE); |
eccb4422 SF |
3374 | trace_smb3_close_err(xid, persistent_fid, tcon->tid, ses->Suid, |
3375 | rc); | |
2503a0db | 3376 | goto close_exit; |
43f8a6a7 | 3377 | } else { |
f90f9797 SF |
3378 | trace_smb3_close_done(xid, persistent_fid, tcon->tid, |
3379 | ses->Suid); | |
43f8a6a7 SF |
3380 | /* |
3381 | * Note that have to subtract 4 since struct network_open_info | |
3382 | * has a final 4 byte pad that close response does not have | |
3383 | */ | |
3384 | if (pbuf) | |
3385 | memcpy(pbuf, (char *)&rsp->CreationTime, sizeof(*pbuf) - 4); | |
3386 | } | |
2503a0db | 3387 | |
fae8044c | 3388 | atomic_dec(&tcon->num_remote_opens); |
2503a0db | 3389 | close_exit: |
8eb4ecfa | 3390 | SMB2_close_free(&rqst); |
2503a0db | 3391 | free_rsp_buf(resp_buftype, rsp); |
9150c3ad PS |
3392 | |
3393 | /* retry close in a worker thread if this one is interrupted */ | |
2659d3bf | 3394 | if (is_interrupt_error(rc)) { |
9e8fae25 SF |
3395 | int tmp_rc; |
3396 | ||
9150c3ad PS |
3397 | tmp_rc = smb2_handle_cancelled_close(tcon, persistent_fid, |
3398 | volatile_fid); | |
3399 | if (tmp_rc) | |
3400 | cifs_dbg(VFS, "handle cancelled close fid 0x%llx returned error %d\n", | |
3401 | persistent_fid, tmp_rc); | |
3402 | } | |
9150c3ad | 3403 | return rc; |
97ca1762 RS |
3404 | } |
3405 | ||
43f8a6a7 SF |
3406 | int |
3407 | SMB2_close(const unsigned int xid, struct cifs_tcon *tcon, | |
3408 | u64 persistent_fid, u64 volatile_fid) | |
3409 | { | |
3410 | return __SMB2_close(xid, tcon, persistent_fid, volatile_fid, NULL); | |
3411 | } | |
3412 | ||
730928c8 RS |
3413 | int |
3414 | smb2_validate_iov(unsigned int offset, unsigned int buffer_length, | |
3415 | struct kvec *iov, unsigned int min_buf_size) | |
be4cb9e3 | 3416 | { |
c1596ff5 | 3417 | unsigned int smb_len = iov->iov_len; |
1fc6ad2f RS |
3418 | char *end_of_smb = smb_len + (char *)iov->iov_base; |
3419 | char *begin_of_buf = offset + (char *)iov->iov_base; | |
be4cb9e3 PS |
3420 | char *end_of_buf = begin_of_buf + buffer_length; |
3421 | ||
3422 | ||
3423 | if (buffer_length < min_buf_size) { | |
f96637be JP |
3424 | cifs_dbg(VFS, "buffer length %d smaller than minimum size %d\n", |
3425 | buffer_length, min_buf_size); | |
be4cb9e3 PS |
3426 | return -EINVAL; |
3427 | } | |
3428 | ||
3429 | /* check if beyond RFC1001 maximum length */ | |
3430 | if ((smb_len > 0x7FFFFF) || (buffer_length > 0x7FFFFF)) { | |
f96637be JP |
3431 | cifs_dbg(VFS, "buffer length %d or smb length %d too large\n", |
3432 | buffer_length, smb_len); | |
be4cb9e3 PS |
3433 | return -EINVAL; |
3434 | } | |
3435 | ||
3436 | if ((begin_of_buf > end_of_smb) || (end_of_buf > end_of_smb)) { | |
a0a3036b | 3437 | cifs_dbg(VFS, "Invalid server response, bad offset to data\n"); |
be4cb9e3 PS |
3438 | return -EINVAL; |
3439 | } | |
3440 | ||
3441 | return 0; | |
3442 | } | |
3443 | ||
3444 | /* | |
3445 | * If SMB buffer fields are valid, copy into temporary buffer to hold result. | |
3446 | * Caller must free buffer. | |
3447 | */ | |
c5a5f38f RS |
3448 | int |
3449 | smb2_validate_and_copy_iov(unsigned int offset, unsigned int buffer_length, | |
3450 | struct kvec *iov, unsigned int minbufsize, | |
3451 | char *data) | |
be4cb9e3 | 3452 | { |
1fc6ad2f | 3453 | char *begin_of_buf = offset + (char *)iov->iov_base; |
be4cb9e3 PS |
3454 | int rc; |
3455 | ||
3456 | if (!data) | |
3457 | return -EINVAL; | |
3458 | ||
730928c8 | 3459 | rc = smb2_validate_iov(offset, buffer_length, iov, minbufsize); |
be4cb9e3 PS |
3460 | if (rc) |
3461 | return rc; | |
3462 | ||
9ee2afe5 | 3463 | memcpy(data, begin_of_buf, minbufsize); |
be4cb9e3 PS |
3464 | |
3465 | return 0; | |
3466 | } | |
3467 | ||
296ecbae | 3468 | int |
352d96f3 AA |
3469 | SMB2_query_info_init(struct cifs_tcon *tcon, struct TCP_Server_Info *server, |
3470 | struct smb_rqst *rqst, | |
296ecbae RS |
3471 | u64 persistent_fid, u64 volatile_fid, |
3472 | u8 info_class, u8 info_type, u32 additional_info, | |
f5b05d62 | 3473 | size_t output_len, size_t input_len, void *input) |
be4cb9e3 PS |
3474 | { |
3475 | struct smb2_query_info_req *req; | |
296ecbae | 3476 | struct kvec *iov = rqst->rq_iov; |
b2fb7fec | 3477 | unsigned int total_len; |
296ecbae | 3478 | int rc; |
be4cb9e3 | 3479 | |
352d96f3 AA |
3480 | rc = smb2_plain_req_init(SMB2_QUERY_INFO, tcon, server, |
3481 | (void **) &req, &total_len); | |
be4cb9e3 PS |
3482 | if (rc) |
3483 | return rc; | |
3484 | ||
42c493c1 | 3485 | req->InfoType = info_type; |
f0df737e | 3486 | req->FileInfoClass = info_class; |
be4cb9e3 PS |
3487 | req->PersistentFileId = persistent_fid; |
3488 | req->VolatileFileId = volatile_fid; | |
42c493c1 | 3489 | req->AdditionalInformation = cpu_to_le32(additional_info); |
48923d2a | 3490 | |
f0df737e | 3491 | req->OutputBufferLength = cpu_to_le32(output_len); |
f5b05d62 RS |
3492 | if (input_len) { |
3493 | req->InputBufferLength = cpu_to_le32(input_len); | |
3494 | /* total_len for smb query request never close to le16 max */ | |
3495 | req->InputBufferOffset = cpu_to_le16(total_len - 1); | |
3496 | memcpy(req->Buffer, input, input_len); | |
3497 | } | |
be4cb9e3 PS |
3498 | |
3499 | iov[0].iov_base = (char *)req; | |
b2fb7fec | 3500 | /* 1 for Buffer */ |
f5b05d62 | 3501 | iov[0].iov_len = total_len - 1 + input_len; |
296ecbae RS |
3502 | return 0; |
3503 | } | |
3504 | ||
3505 | void | |
3506 | SMB2_query_info_free(struct smb_rqst *rqst) | |
3507 | { | |
32a1fb36 RS |
3508 | if (rqst && rqst->rq_iov) |
3509 | cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */ | |
296ecbae RS |
3510 | } |
3511 | ||
3512 | static int | |
3513 | query_info(const unsigned int xid, struct cifs_tcon *tcon, | |
3514 | u64 persistent_fid, u64 volatile_fid, u8 info_class, u8 info_type, | |
3515 | u32 additional_info, size_t output_len, size_t min_len, void **data, | |
3516 | u32 *dlen) | |
3517 | { | |
3518 | struct smb_rqst rqst; | |
3519 | struct smb2_query_info_rsp *rsp = NULL; | |
3520 | struct kvec iov[1]; | |
3521 | struct kvec rsp_iov; | |
3522 | int rc = 0; | |
ef2298a0 | 3523 | int resp_buftype = CIFS_NO_BUFFER; |
296ecbae | 3524 | struct cifs_ses *ses = tcon->ses; |
ac6ad7a8 | 3525 | struct TCP_Server_Info *server; |
296ecbae | 3526 | int flags = 0; |
73aaf920 | 3527 | bool allocated = false; |
296ecbae RS |
3528 | |
3529 | cifs_dbg(FYI, "Query Info\n"); | |
3530 | ||
ac6ad7a8 CIK |
3531 | if (!ses) |
3532 | return -EIO; | |
352d96f3 | 3533 | server = cifs_pick_channel(ses); |
ac6ad7a8 | 3534 | if (!server) |
296ecbae RS |
3535 | return -EIO; |
3536 | ||
3537 | if (smb3_encryption_required(tcon)) | |
3538 | flags |= CIFS_TRANSFORM_REQ; | |
be4cb9e3 | 3539 | |
40eff45b | 3540 | memset(&rqst, 0, sizeof(struct smb_rqst)); |
296ecbae | 3541 | memset(&iov, 0, sizeof(iov)); |
40eff45b RS |
3542 | rqst.rq_iov = iov; |
3543 | rqst.rq_nvec = 1; | |
3544 | ||
352d96f3 AA |
3545 | rc = SMB2_query_info_init(tcon, server, |
3546 | &rqst, persistent_fid, volatile_fid, | |
296ecbae | 3547 | info_class, info_type, additional_info, |
f5b05d62 | 3548 | output_len, 0, NULL); |
296ecbae RS |
3549 | if (rc) |
3550 | goto qinf_exit; | |
3551 | ||
d42043a6 SF |
3552 | trace_smb3_query_info_enter(xid, persistent_fid, tcon->tid, |
3553 | ses->Suid, info_class, (__u32)info_type); | |
3554 | ||
352d96f3 AA |
3555 | rc = cifs_send_recv(xid, ses, server, |
3556 | &rqst, &resp_buftype, flags, &rsp_iov); | |
da502f7d | 3557 | rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; |
e5d04887 | 3558 | |
be4cb9e3 PS |
3559 | if (rc) { |
3560 | cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE); | |
eccb4422 SF |
3561 | trace_smb3_query_info_err(xid, persistent_fid, tcon->tid, |
3562 | ses->Suid, info_class, (__u32)info_type, rc); | |
be4cb9e3 PS |
3563 | goto qinf_exit; |
3564 | } | |
3565 | ||
d42043a6 SF |
3566 | trace_smb3_query_info_done(xid, persistent_fid, tcon->tid, |
3567 | ses->Suid, info_class, (__u32)info_type); | |
3568 | ||
42c493c1 SP |
3569 | if (dlen) { |
3570 | *dlen = le32_to_cpu(rsp->OutputBufferLength); | |
3571 | if (!*data) { | |
3572 | *data = kmalloc(*dlen, GFP_KERNEL); | |
3573 | if (!*data) { | |
3175eb9b | 3574 | cifs_tcon_dbg(VFS, |
42c493c1 SP |
3575 | "Error %d allocating memory for acl\n", |
3576 | rc); | |
3577 | *dlen = 0; | |
73aaf920 | 3578 | rc = -ENOMEM; |
42c493c1 SP |
3579 | goto qinf_exit; |
3580 | } | |
73aaf920 | 3581 | allocated = true; |
42c493c1 SP |
3582 | } |
3583 | } | |
3584 | ||
c5a5f38f RS |
3585 | rc = smb2_validate_and_copy_iov(le16_to_cpu(rsp->OutputBufferOffset), |
3586 | le32_to_cpu(rsp->OutputBufferLength), | |
9ee2afe5 | 3587 | &rsp_iov, dlen ? *dlen : min_len, *data); |
73aaf920 CIK |
3588 | if (rc && allocated) { |
3589 | kfree(*data); | |
3590 | *data = NULL; | |
3591 | *dlen = 0; | |
3592 | } | |
be4cb9e3 PS |
3593 | |
3594 | qinf_exit: | |
296ecbae | 3595 | SMB2_query_info_free(&rqst); |
be4cb9e3 PS |
3596 | free_rsp_buf(resp_buftype, rsp); |
3597 | return rc; | |
3598 | } | |
9094fad1 | 3599 | |
42c493c1 SP |
3600 | int SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon, |
3601 | u64 persistent_fid, u64 volatile_fid, struct smb2_file_all_info *data) | |
3602 | { | |
3603 | return query_info(xid, tcon, persistent_fid, volatile_fid, | |
3604 | FILE_ALL_INFORMATION, SMB2_O_INFO_FILE, 0, | |
3605 | sizeof(struct smb2_file_all_info) + PATH_MAX * 2, | |
3606 | sizeof(struct smb2_file_all_info), (void **)&data, | |
3607 | NULL); | |
3608 | } | |
3609 | ||
e0ae8a9a SF |
3610 | #if 0 |
3611 | /* currently unused, as now we are doing compounding instead (see smb311_posix_query_path_info) */ | |
b1bc1874 SF |
3612 | int |
3613 | SMB311_posix_query_info(const unsigned int xid, struct cifs_tcon *tcon, | |
3614 | u64 persistent_fid, u64 volatile_fid, struct smb311_posix_qinfo *data, u32 *plen) | |
3615 | { | |
3616 | size_t output_len = sizeof(struct smb311_posix_qinfo *) + | |
3617 | (sizeof(struct cifs_sid) * 2) + (PATH_MAX * 2); | |
3618 | *plen = 0; | |
3619 | ||
3620 | return query_info(xid, tcon, persistent_fid, volatile_fid, | |
3621 | SMB_FIND_FILE_POSIX_INFO, SMB2_O_INFO_FILE, 0, | |
3622 | output_len, sizeof(struct smb311_posix_qinfo), (void **)&data, plen); | |
e0ae8a9a | 3623 | /* Note caller must free "data" (passed in above). It may be allocated in query_info call */ |
b1bc1874 | 3624 | } |
e0ae8a9a | 3625 | #endif |
b1bc1874 | 3626 | |
f0df737e | 3627 | int |
42c493c1 | 3628 | SMB2_query_acl(const unsigned int xid, struct cifs_tcon *tcon, |
3970acf7 | 3629 | u64 persistent_fid, u64 volatile_fid, |
9541b813 | 3630 | void **data, u32 *plen, u32 extra_info) |
f0df737e | 3631 | { |
9541b813 BP |
3632 | __u32 additional_info = OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO | |
3633 | extra_info; | |
42c493c1 SP |
3634 | *plen = 0; |
3635 | ||
f0df737e | 3636 | return query_info(xid, tcon, persistent_fid, volatile_fid, |
42c493c1 | 3637 | 0, SMB2_O_INFO_SECURITY, additional_info, |
ee25c6dd | 3638 | SMB2_MAX_BUFFER_SIZE, MIN_SEC_DESC_LEN, data, plen); |
f0df737e PS |
3639 | } |
3640 | ||
3641 | int | |
3642 | SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon, | |
3643 | u64 persistent_fid, u64 volatile_fid, __le64 *uniqueid) | |
3644 | { | |
3645 | return query_info(xid, tcon, persistent_fid, volatile_fid, | |
42c493c1 SP |
3646 | FILE_INTERNAL_INFORMATION, SMB2_O_INFO_FILE, 0, |
3647 | sizeof(struct smb2_file_internal_info), | |
f0df737e | 3648 | sizeof(struct smb2_file_internal_info), |
42c493c1 | 3649 | (void **)&uniqueid, NULL); |
f0df737e PS |
3650 | } |
3651 | ||
c3498185 SF |
3652 | /* |
3653 | * CHANGE_NOTIFY Request is sent to get notifications on changes to a directory | |
3654 | * See MS-SMB2 2.2.35 and 2.2.36 | |
3655 | */ | |
3656 | ||
388962e8 | 3657 | static int |
c3498185 | 3658 | SMB2_notify_init(const unsigned int xid, struct smb_rqst *rqst, |
352d96f3 AA |
3659 | struct cifs_tcon *tcon, struct TCP_Server_Info *server, |
3660 | u64 persistent_fid, u64 volatile_fid, | |
3661 | u32 completion_filter, bool watch_tree) | |
c3498185 SF |
3662 | { |
3663 | struct smb2_change_notify_req *req; | |
3664 | struct kvec *iov = rqst->rq_iov; | |
3665 | unsigned int total_len; | |
3666 | int rc; | |
3667 | ||
352d96f3 AA |
3668 | rc = smb2_plain_req_init(SMB2_CHANGE_NOTIFY, tcon, server, |
3669 | (void **) &req, &total_len); | |
c3498185 SF |
3670 | if (rc) |
3671 | return rc; | |
3672 | ||
351a59da PA |
3673 | req->PersistentFileId = persistent_fid; |
3674 | req->VolatileFileId = volatile_fid; | |
d26c2ddd | 3675 | /* See note 354 of MS-SMB2, 64K max */ |
52870d50 SF |
3676 | req->OutputBufferLength = |
3677 | cpu_to_le32(SMB2_MAX_BUFFER_SIZE - MAX_SMB2_HDR_SIZE); | |
c3498185 SF |
3678 | req->CompletionFilter = cpu_to_le32(completion_filter); |
3679 | if (watch_tree) | |
3680 | req->Flags = cpu_to_le16(SMB2_WATCH_TREE); | |
3681 | else | |
3682 | req->Flags = 0; | |
3683 | ||
3684 | iov[0].iov_base = (char *)req; | |
3685 | iov[0].iov_len = total_len; | |
3686 | ||
3687 | return 0; | |
3688 | } | |
3689 | ||
3690 | int | |
3691 | SMB2_change_notify(const unsigned int xid, struct cifs_tcon *tcon, | |
3692 | u64 persistent_fid, u64 volatile_fid, bool watch_tree, | |
e3e94634 SF |
3693 | u32 completion_filter, u32 max_out_data_len, char **out_data, |
3694 | u32 *plen /* returned data len */) | |
c3498185 SF |
3695 | { |
3696 | struct cifs_ses *ses = tcon->ses; | |
352d96f3 | 3697 | struct TCP_Server_Info *server = cifs_pick_channel(ses); |
c3498185 | 3698 | struct smb_rqst rqst; |
e3e94634 | 3699 | struct smb2_change_notify_rsp *smb_rsp; |
c3498185 SF |
3700 | struct kvec iov[1]; |
3701 | struct kvec rsp_iov = {NULL, 0}; | |
3702 | int resp_buftype = CIFS_NO_BUFFER; | |
3703 | int flags = 0; | |
3704 | int rc = 0; | |
3705 | ||
3706 | cifs_dbg(FYI, "change notify\n"); | |
352d96f3 | 3707 | if (!ses || !server) |
c3498185 SF |
3708 | return -EIO; |
3709 | ||
3710 | if (smb3_encryption_required(tcon)) | |
3711 | flags |= CIFS_TRANSFORM_REQ; | |
3712 | ||
3713 | memset(&rqst, 0, sizeof(struct smb_rqst)); | |
3714 | memset(&iov, 0, sizeof(iov)); | |
e3e94634 SF |
3715 | if (plen) |
3716 | *plen = 0; | |
3717 | ||
c3498185 SF |
3718 | rqst.rq_iov = iov; |
3719 | rqst.rq_nvec = 1; | |
3720 | ||
352d96f3 AA |
3721 | rc = SMB2_notify_init(xid, &rqst, tcon, server, |
3722 | persistent_fid, volatile_fid, | |
c3498185 SF |
3723 | completion_filter, watch_tree); |
3724 | if (rc) | |
3725 | goto cnotify_exit; | |
3726 | ||
3727 | trace_smb3_notify_enter(xid, persistent_fid, tcon->tid, ses->Suid, | |
3728 | (u8)watch_tree, completion_filter); | |
352d96f3 AA |
3729 | rc = cifs_send_recv(xid, ses, server, |
3730 | &rqst, &resp_buftype, flags, &rsp_iov); | |
c3498185 SF |
3731 | |
3732 | if (rc != 0) { | |
3733 | cifs_stats_fail_inc(tcon, SMB2_CHANGE_NOTIFY_HE); | |
3734 | trace_smb3_notify_err(xid, persistent_fid, tcon->tid, ses->Suid, | |
3735 | (u8)watch_tree, completion_filter, rc); | |
e3e94634 | 3736 | } else { |
c3498185 | 3737 | trace_smb3_notify_done(xid, persistent_fid, tcon->tid, |
e3e94634 SF |
3738 | ses->Suid, (u8)watch_tree, completion_filter); |
3739 | /* validate that notify information is plausible */ | |
3740 | if ((rsp_iov.iov_base == NULL) || | |
eb3e28c1 | 3741 | (rsp_iov.iov_len < sizeof(struct smb2_change_notify_rsp) + 1)) |
e3e94634 SF |
3742 | goto cnotify_exit; |
3743 | ||
3744 | smb_rsp = (struct smb2_change_notify_rsp *)rsp_iov.iov_base; | |
3745 | ||
3746 | smb2_validate_iov(le16_to_cpu(smb_rsp->OutputBufferOffset), | |
3747 | le32_to_cpu(smb_rsp->OutputBufferLength), &rsp_iov, | |
3748 | sizeof(struct file_notify_information)); | |
3749 | ||
3750 | *out_data = kmemdup((char *)smb_rsp + le16_to_cpu(smb_rsp->OutputBufferOffset), | |
3751 | le32_to_cpu(smb_rsp->OutputBufferLength), GFP_KERNEL); | |
3752 | if (*out_data == NULL) { | |
3753 | rc = -ENOMEM; | |
3754 | goto cnotify_exit; | |
b535cc79 | 3755 | } else if (plen) |
e3e94634 SF |
3756 | *plen = le32_to_cpu(smb_rsp->OutputBufferLength); |
3757 | } | |
c3498185 SF |
3758 | |
3759 | cnotify_exit: | |
3760 | if (rqst.rq_iov) | |
3761 | cifs_small_buf_release(rqst.rq_iov[0].iov_base); /* request */ | |
3762 | free_rsp_buf(resp_buftype, rsp_iov.iov_base); | |
3763 | return rc; | |
3764 | } | |
3765 | ||
3766 | ||
3767 | ||
9094fad1 PS |
3768 | /* |
3769 | * This is a no-op for now. We're not really interested in the reply, but | |
3770 | * rather in the fact that the server sent one and that server->lstrp | |
3771 | * gets updated. | |
3772 | * | |
3773 | * FIXME: maybe we should consider checking that the reply matches request? | |
3774 | */ | |
3775 | static void | |
3776 | smb2_echo_callback(struct mid_q_entry *mid) | |
3777 | { | |
3778 | struct TCP_Server_Info *server = mid->callback_data; | |
31473fc4 | 3779 | struct smb2_echo_rsp *rsp = (struct smb2_echo_rsp *)mid->resp_buf; |
34f4deb7 | 3780 | struct cifs_credits credits = { .value = 0, .instance = 0 }; |
9094fad1 | 3781 | |
0fd1d37b | 3782 | if (mid->mid_state == MID_RESPONSE_RECEIVED |
34f4deb7 | 3783 | || mid->mid_state == MID_RESPONSE_MALFORMED) { |
0d35e382 | 3784 | credits.value = le16_to_cpu(rsp->hdr.CreditRequest); |
34f4deb7 PS |
3785 | credits.instance = server->reconnect_instance; |
3786 | } | |
9094fad1 | 3787 | |
70f08f91 | 3788 | release_mid(mid); |
34f4deb7 | 3789 | add_credits(server, &credits, CIFS_ECHO_OP); |
9094fad1 PS |
3790 | } |
3791 | ||
53e0e11e PS |
3792 | void smb2_reconnect_server(struct work_struct *work) |
3793 | { | |
3794 | struct TCP_Server_Info *server = container_of(work, | |
3795 | struct TCP_Server_Info, reconnect.work); | |
3663c904 SP |
3796 | struct TCP_Server_Info *pserver; |
3797 | struct cifs_ses *ses, *ses2; | |
53e0e11e | 3798 | struct cifs_tcon *tcon, *tcon2; |
3663c904 SP |
3799 | struct list_head tmp_list, tmp_ses_list; |
3800 | bool tcon_exist = false, ses_exist = false; | |
8a409cda | 3801 | bool tcon_selected = false; |
18ea4311 | 3802 | int rc; |
3663c904 | 3803 | bool resched = false; |
18ea4311 | 3804 | |
3663c904 | 3805 | /* If server is a channel, select the primary channel */ |
b3773b19 | 3806 | pserver = SERVER_IS_CHAN(server) ? server->primary_server : server; |
53e0e11e PS |
3807 | |
3808 | /* Prevent simultaneous reconnects that can corrupt tcon->rlist list */ | |
3663c904 | 3809 | mutex_lock(&pserver->reconnect_mutex); |
53e0e11e PS |
3810 | |
3811 | INIT_LIST_HEAD(&tmp_list); | |
3663c904 SP |
3812 | INIT_LIST_HEAD(&tmp_ses_list); |
3813 | cifs_dbg(FYI, "Reconnecting tcons and channels\n"); | |
53e0e11e PS |
3814 | |
3815 | spin_lock(&cifs_tcp_ses_lock); | |
3663c904 | 3816 | list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) { |
99f28070 WW |
3817 | spin_lock(&ses->ses_lock); |
3818 | if (ses->ses_status == SES_EXITING) { | |
3819 | spin_unlock(&ses->ses_lock); | |
3820 | continue; | |
3821 | } | |
3822 | spin_unlock(&ses->ses_lock); | |
3663c904 | 3823 | |
8a409cda | 3824 | tcon_selected = false; |
3663c904 | 3825 | |
53e0e11e | 3826 | list_for_each_entry(tcon, &ses->tcon_list, tcon_list) { |
96a988ff | 3827 | if (tcon->need_reconnect || tcon->need_reopen_files) { |
53e0e11e PS |
3828 | tcon->tc_count++; |
3829 | list_add_tail(&tcon->rlist, &tmp_list); | |
3663c904 | 3830 | tcon_selected = tcon_exist = true; |
53e0e11e PS |
3831 | } |
3832 | } | |
0ff2b018 RS |
3833 | /* |
3834 | * IPC has the same lifetime as its session and uses its | |
3835 | * refcount. | |
3836 | */ | |
b327a717 AA |
3837 | if (ses->tcon_ipc && ses->tcon_ipc->need_reconnect) { |
3838 | list_add_tail(&ses->tcon_ipc->rlist, &tmp_list); | |
3663c904 | 3839 | tcon_selected = tcon_exist = true; |
8e355415 | 3840 | cifs_smb_ses_inc_refcount(ses); |
3663c904 SP |
3841 | } |
3842 | /* | |
3843 | * handle the case where channel needs to reconnect | |
3844 | * binding session, but tcon is healthy (some other channel | |
3845 | * is active) | |
3846 | */ | |
88b024f5 | 3847 | spin_lock(&ses->chan_lock); |
3663c904 SP |
3848 | if (!tcon_selected && cifs_chan_needs_reconnect(ses, server)) { |
3849 | list_add_tail(&ses->rlist, &tmp_ses_list); | |
8a409cda | 3850 | ses_exist = true; |
8e355415 | 3851 | cifs_smb_ses_inc_refcount(ses); |
b327a717 | 3852 | } |
88b024f5 | 3853 | spin_unlock(&ses->chan_lock); |
53e0e11e PS |
3854 | } |
3855 | /* | |
3856 | * Get the reference to server struct to be sure that the last call of | |
3857 | * cifs_put_tcon() in the loop below won't release the server pointer. | |
3858 | */ | |
3663c904 | 3859 | if (tcon_exist || ses_exist) |
53e0e11e PS |
3860 | server->srv_count++; |
3861 | ||
3862 | spin_unlock(&cifs_tcp_ses_lock); | |
3863 | ||
3864 | list_for_each_entry_safe(tcon, tcon2, &tmp_list, rlist) { | |
352d96f3 | 3865 | rc = smb2_reconnect(SMB2_INTERNAL_CMD, tcon, server); |
18ea4311 | 3866 | if (!rc) |
96a988ff | 3867 | cifs_reopen_persistent_handles(tcon); |
18ea4311 GP |
3868 | else |
3869 | resched = true; | |
53e0e11e | 3870 | list_del_init(&tcon->rlist); |
0ff2b018 RS |
3871 | if (tcon->ipc) |
3872 | cifs_put_smb_ses(tcon->ses); | |
3873 | else | |
3874 | cifs_put_tcon(tcon); | |
53e0e11e PS |
3875 | } |
3876 | ||
3663c904 SP |
3877 | if (!ses_exist) |
3878 | goto done; | |
3879 | ||
3880 | /* allocate a dummy tcon struct used for reconnect */ | |
2da338ff | 3881 | tcon = tcon_info_alloc(false); |
3663c904 SP |
3882 | if (!tcon) { |
3883 | resched = true; | |
a96c9448 XT |
3884 | list_for_each_entry_safe(ses, ses2, &tmp_ses_list, rlist) { |
3885 | list_del_init(&ses->rlist); | |
3886 | cifs_put_smb_ses(ses); | |
3887 | } | |
3663c904 SP |
3888 | goto done; |
3889 | } | |
3890 | ||
fdf59eb5 | 3891 | tcon->status = TID_GOOD; |
3663c904 SP |
3892 | tcon->retry = false; |
3893 | tcon->need_reconnect = false; | |
3894 | ||
3895 | /* now reconnect sessions for necessary channels */ | |
3896 | list_for_each_entry_safe(ses, ses2, &tmp_ses_list, rlist) { | |
3897 | tcon->ses = ses; | |
3898 | rc = smb2_reconnect(SMB2_INTERNAL_CMD, tcon, server); | |
3899 | if (rc) | |
3900 | resched = true; | |
3901 | list_del_init(&ses->rlist); | |
3902 | cifs_put_smb_ses(ses); | |
3903 | } | |
df57109b | 3904 | tconInfoFree(tcon); |
3663c904 SP |
3905 | |
3906 | done: | |
3907 | cifs_dbg(FYI, "Reconnecting tcons and channels finished\n"); | |
18ea4311 GP |
3908 | if (resched) |
3909 | queue_delayed_work(cifsiod_wq, &server->reconnect, 2 * HZ); | |
3663c904 | 3910 | mutex_unlock(&pserver->reconnect_mutex); |
53e0e11e PS |
3911 | |
3912 | /* now we can safely release srv struct */ | |
3663c904 | 3913 | if (tcon_exist || ses_exist) |
53e0e11e PS |
3914 | cifs_put_tcp_session(server, 1); |
3915 | } | |
3916 | ||
9094fad1 PS |
3917 | int |
3918 | SMB2_echo(struct TCP_Server_Info *server) | |
3919 | { | |
3920 | struct smb2_echo_req *req; | |
3921 | int rc = 0; | |
c713c877 | 3922 | struct kvec iov[1]; |
738f9de5 | 3923 | struct smb_rqst rqst = { .rq_iov = iov, |
c713c877 | 3924 | .rq_nvec = 1 }; |
7f7ae759 | 3925 | unsigned int total_len; |
9094fad1 | 3926 | |
bda487ac | 3927 | cifs_dbg(FYI, "In echo request for conn_id %lld\n", server->conn_id); |
9094fad1 | 3928 | |
d7d7a66a | 3929 | spin_lock(&server->srv_lock); |
1a6a41d4 SP |
3930 | if (server->ops->need_neg && |
3931 | server->ops->need_neg(server)) { | |
d7d7a66a | 3932 | spin_unlock(&server->srv_lock); |
53e0e11e | 3933 | /* No need to send echo on newly established connections */ |
b08484d7 | 3934 | mod_delayed_work(cifsiod_wq, &server->reconnect, 0); |
53e0e11e | 3935 | return rc; |
4fcd1813 | 3936 | } |
d7d7a66a | 3937 | spin_unlock(&server->srv_lock); |
4fcd1813 | 3938 | |
352d96f3 AA |
3939 | rc = smb2_plain_req_init(SMB2_ECHO, NULL, server, |
3940 | (void **)&req, &total_len); | |
9094fad1 PS |
3941 | if (rc) |
3942 | return rc; | |
3943 | ||
0d35e382 | 3944 | req->hdr.CreditRequest = cpu_to_le16(1); |
9094fad1 | 3945 | |
c713c877 RS |
3946 | iov[0].iov_len = total_len; |
3947 | iov[0].iov_base = (char *)req; | |
9094fad1 | 3948 | |
9b7c18a2 | 3949 | rc = cifs_call_async(server, &rqst, NULL, smb2_echo_callback, NULL, |
3349c3a7 | 3950 | server, CIFS_ECHO_OP, NULL); |
9094fad1 | 3951 | if (rc) |
f96637be | 3952 | cifs_dbg(FYI, "Echo request failed: %d\n", rc); |
9094fad1 PS |
3953 | |
3954 | cifs_small_buf_release(req); | |
3955 | return rc; | |
3956 | } | |
7a5cfb19 | 3957 | |
86e14e12 RS |
3958 | void |
3959 | SMB2_flush_free(struct smb_rqst *rqst) | |
3960 | { | |
3961 | if (rqst && rqst->rq_iov) | |
3962 | cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */ | |
3963 | } | |
3964 | ||
7a5cfb19 | 3965 | int |
86e14e12 | 3966 | SMB2_flush_init(const unsigned int xid, struct smb_rqst *rqst, |
352d96f3 AA |
3967 | struct cifs_tcon *tcon, struct TCP_Server_Info *server, |
3968 | u64 persistent_fid, u64 volatile_fid) | |
7a5cfb19 PS |
3969 | { |
3970 | struct smb2_flush_req *req; | |
86e14e12 | 3971 | struct kvec *iov = rqst->rq_iov; |
1f444e4c | 3972 | unsigned int total_len; |
86e14e12 | 3973 | int rc; |
7a5cfb19 | 3974 | |
352d96f3 AA |
3975 | rc = smb2_plain_req_init(SMB2_FLUSH, tcon, server, |
3976 | (void **) &req, &total_len); | |
7a5cfb19 PS |
3977 | if (rc) |
3978 | return rc; | |
3979 | ||
351a59da PA |
3980 | req->PersistentFileId = persistent_fid; |
3981 | req->VolatileFileId = volatile_fid; | |
7a5cfb19 PS |
3982 | |
3983 | iov[0].iov_base = (char *)req; | |
1f444e4c | 3984 | iov[0].iov_len = total_len; |
7a5cfb19 | 3985 | |
86e14e12 RS |
3986 | return 0; |
3987 | } | |
3988 | ||
3989 | int | |
3990 | SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, | |
3991 | u64 volatile_fid) | |
3992 | { | |
3993 | struct cifs_ses *ses = tcon->ses; | |
3994 | struct smb_rqst rqst; | |
3995 | struct kvec iov[1]; | |
3996 | struct kvec rsp_iov = {NULL, 0}; | |
352d96f3 | 3997 | struct TCP_Server_Info *server = cifs_pick_channel(ses); |
86e14e12 RS |
3998 | int resp_buftype = CIFS_NO_BUFFER; |
3999 | int flags = 0; | |
4000 | int rc = 0; | |
4001 | ||
4002 | cifs_dbg(FYI, "flush\n"); | |
4003 | if (!ses || !(ses->server)) | |
4004 | return -EIO; | |
4005 | ||
4006 | if (smb3_encryption_required(tcon)) | |
4007 | flags |= CIFS_TRANSFORM_REQ; | |
4008 | ||
40eff45b | 4009 | memset(&rqst, 0, sizeof(struct smb_rqst)); |
86e14e12 | 4010 | memset(&iov, 0, sizeof(iov)); |
40eff45b RS |
4011 | rqst.rq_iov = iov; |
4012 | rqst.rq_nvec = 1; | |
4013 | ||
352d96f3 AA |
4014 | rc = SMB2_flush_init(xid, &rqst, tcon, server, |
4015 | persistent_fid, volatile_fid); | |
86e14e12 RS |
4016 | if (rc) |
4017 | goto flush_exit; | |
4018 | ||
f90f9797 | 4019 | trace_smb3_flush_enter(xid, persistent_fid, tcon->tid, ses->Suid); |
352d96f3 AA |
4020 | rc = cifs_send_recv(xid, ses, server, |
4021 | &rqst, &resp_buftype, flags, &rsp_iov); | |
7a5cfb19 | 4022 | |
eccb4422 | 4023 | if (rc != 0) { |
7a5cfb19 | 4024 | cifs_stats_fail_inc(tcon, SMB2_FLUSH_HE); |
eccb4422 SF |
4025 | trace_smb3_flush_err(xid, persistent_fid, tcon->tid, ses->Suid, |
4026 | rc); | |
f90f9797 SF |
4027 | } else |
4028 | trace_smb3_flush_done(xid, persistent_fid, tcon->tid, | |
4029 | ses->Suid); | |
7a5cfb19 | 4030 | |
86e14e12 RS |
4031 | flush_exit: |
4032 | SMB2_flush_free(&rqst); | |
da502f7d | 4033 | free_rsp_buf(resp_buftype, rsp_iov.iov_base); |
7a5cfb19 PS |
4034 | return rc; |
4035 | } | |
09a4707e | 4036 | |
a6559cc1 SM |
4037 | #ifdef CONFIG_CIFS_SMB_DIRECT |
4038 | static inline bool smb3_use_rdma_offload(struct cifs_io_parms *io_parms) | |
4039 | { | |
4040 | struct TCP_Server_Info *server = io_parms->server; | |
4041 | struct cifs_tcon *tcon = io_parms->tcon; | |
4042 | ||
4043 | /* we can only offload if we're connected */ | |
4044 | if (!server || !tcon) | |
4045 | return false; | |
4046 | ||
4047 | /* we can only offload on an rdma connection */ | |
4048 | if (!server->rdma || !server->smbd_conn) | |
4049 | return false; | |
4050 | ||
4051 | /* we don't support signed offload yet */ | |
4052 | if (server->sign) | |
4053 | return false; | |
4054 | ||
3891f6c7 SM |
4055 | /* we don't support encrypted offload yet */ |
4056 | if (smb3_encryption_required(tcon)) | |
4057 | return false; | |
4058 | ||
a6559cc1 SM |
4059 | /* offload also has its overhead, so only do it if desired */ |
4060 | if (io_parms->length < server->smbd_conn->rdma_readwrite_threshold) | |
4061 | return false; | |
4062 | ||
4063 | return true; | |
4064 | } | |
4065 | #endif /* CONFIG_CIFS_SMB_DIRECT */ | |
4066 | ||
09a4707e PS |
4067 | /* |
4068 | * To form a chain of read requests, any read requests after the first should | |
4069 | * have the end_of_chain boolean set to true. | |
4070 | */ | |
4071 | static int | |
738f9de5 | 4072 | smb2_new_read_req(void **buf, unsigned int *total_len, |
2dabfd5b LL |
4073 | struct cifs_io_parms *io_parms, struct cifs_readdata *rdata, |
4074 | unsigned int remaining_bytes, int request_type) | |
09a4707e PS |
4075 | { |
4076 | int rc = -EACCES; | |
d8d9de53 | 4077 | struct smb2_read_req *req = NULL; |
0d35e382 | 4078 | struct smb2_hdr *shdr; |
352d96f3 | 4079 | struct TCP_Server_Info *server = io_parms->server; |
09a4707e | 4080 | |
352d96f3 AA |
4081 | rc = smb2_plain_req_init(SMB2_READ, io_parms->tcon, server, |
4082 | (void **) &req, total_len); | |
09a4707e PS |
4083 | if (rc) |
4084 | return rc; | |
2dabfd5b | 4085 | |
2dabfd5b | 4086 | if (server == NULL) |
09a4707e PS |
4087 | return -ECONNABORTED; |
4088 | ||
0d35e382 RS |
4089 | shdr = &req->hdr; |
4090 | shdr->Id.SyncId.ProcessId = cpu_to_le32(io_parms->pid); | |
09a4707e | 4091 | |
351a59da PA |
4092 | req->PersistentFileId = io_parms->persistent_fid; |
4093 | req->VolatileFileId = io_parms->volatile_fid; | |
09a4707e PS |
4094 | req->ReadChannelInfoOffset = 0; /* reserved */ |
4095 | req->ReadChannelInfoLength = 0; /* reserved */ | |
4096 | req->Channel = 0; /* reserved */ | |
4097 | req->MinimumCount = 0; | |
4098 | req->Length = cpu_to_le32(io_parms->length); | |
4099 | req->Offset = cpu_to_le64(io_parms->offset); | |
d323c246 SF |
4100 | |
4101 | trace_smb3_read_enter(0 /* xid */, | |
4102 | io_parms->persistent_fid, | |
4103 | io_parms->tcon->tid, io_parms->tcon->ses->Suid, | |
4104 | io_parms->offset, io_parms->length); | |
bd3dcc6a LL |
4105 | #ifdef CONFIG_CIFS_SMB_DIRECT |
4106 | /* | |
4107 | * If we want to do a RDMA write, fill in and append | |
4108 | * smbd_buffer_descriptor_v1 to the end of read request | |
4109 | */ | |
a6559cc1 | 4110 | if (smb3_use_rdma_offload(io_parms)) { |
bd3dcc6a | 4111 | struct smbd_buffer_descriptor_v1 *v1; |
352d96f3 | 4112 | bool need_invalidate = server->dialect == SMB30_PROT_ID; |
bd3dcc6a | 4113 | |
d08089f6 DH |
4114 | rdata->mr = smbd_register_mr(server->smbd_conn, &rdata->iter, |
4115 | true, need_invalidate); | |
bd3dcc6a | 4116 | if (!rdata->mr) |
b7972092 | 4117 | return -EAGAIN; |
bd3dcc6a LL |
4118 | |
4119 | req->Channel = SMB2_CHANNEL_RDMA_V1_INVALIDATE; | |
4120 | if (need_invalidate) | |
4121 | req->Channel = SMB2_CHANNEL_RDMA_V1; | |
4122 | req->ReadChannelInfoOffset = | |
d8d9de53 | 4123 | cpu_to_le16(offsetof(struct smb2_read_req, Buffer)); |
bd3dcc6a | 4124 | req->ReadChannelInfoLength = |
2026b06e | 4125 | cpu_to_le16(sizeof(struct smbd_buffer_descriptor_v1)); |
bd3dcc6a | 4126 | v1 = (struct smbd_buffer_descriptor_v1 *) &req->Buffer[0]; |
2026b06e SF |
4127 | v1->offset = cpu_to_le64(rdata->mr->mr->iova); |
4128 | v1->token = cpu_to_le32(rdata->mr->mr->rkey); | |
4129 | v1->length = cpu_to_le32(rdata->mr->mr->length); | |
bd3dcc6a LL |
4130 | |
4131 | *total_len += sizeof(*v1) - 1; | |
4132 | } | |
4133 | #endif | |
09a4707e PS |
4134 | if (request_type & CHAINED_REQUEST) { |
4135 | if (!(request_type & END_OF_CHAIN)) { | |
b8f57ee8 | 4136 | /* next 8-byte aligned request */ |
d7173623 | 4137 | *total_len = ALIGN(*total_len, 8); |
b8f57ee8 | 4138 | shdr->NextCommand = cpu_to_le32(*total_len); |
09a4707e | 4139 | } else /* END_OF_CHAIN */ |
31473fc4 | 4140 | shdr->NextCommand = 0; |
09a4707e | 4141 | if (request_type & RELATED_REQUEST) { |
31473fc4 | 4142 | shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS; |
09a4707e PS |
4143 | /* |
4144 | * Related requests use info from previous read request | |
4145 | * in chain. | |
4146 | */ | |
0d35e382 RS |
4147 | shdr->SessionId = cpu_to_le64(0xFFFFFFFFFFFFFFFF); |
4148 | shdr->Id.SyncId.TreeId = cpu_to_le32(0xFFFFFFFF); | |
351a59da PA |
4149 | req->PersistentFileId = (u64)-1; |
4150 | req->VolatileFileId = (u64)-1; | |
09a4707e PS |
4151 | } |
4152 | } | |
4153 | if (remaining_bytes > io_parms->length) | |
4154 | req->RemainingBytes = cpu_to_le32(remaining_bytes); | |
4155 | else | |
4156 | req->RemainingBytes = 0; | |
4157 | ||
738f9de5 | 4158 | *buf = req; |
09a4707e PS |
4159 | return rc; |
4160 | } | |
4161 | ||
4162 | static void | |
4163 | smb2_readv_callback(struct mid_q_entry *mid) | |
4164 | { | |
4165 | struct cifs_readdata *rdata = mid->callback_data; | |
4166 | struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink); | |
352d96f3 | 4167 | struct TCP_Server_Info *server = rdata->server; |
0d35e382 RS |
4168 | struct smb2_hdr *shdr = |
4169 | (struct smb2_hdr *)rdata->iov[0].iov_base; | |
34f4deb7 | 4170 | struct cifs_credits credits = { .value = 0, .instance = 0 }; |
023fc150 DH |
4171 | struct smb_rqst rqst = { .rq_iov = &rdata->iov[1], .rq_nvec = 1 }; |
4172 | ||
4173 | if (rdata->got_bytes) { | |
4174 | rqst.rq_iter = rdata->iter; | |
4175 | rqst.rq_iter_size = iov_iter_count(&rdata->iter); | |
9ee04875 | 4176 | } |
09a4707e | 4177 | |
352d96f3 AA |
4178 | WARN_ONCE(rdata->server != mid->server, |
4179 | "rdata server %p != mid server %p", | |
4180 | rdata->server, mid->server); | |
4181 | ||
f96637be JP |
4182 | cifs_dbg(FYI, "%s: mid=%llu state=%d result=%d bytes=%u\n", |
4183 | __func__, mid->mid, mid->mid_state, rdata->result, | |
4184 | rdata->bytes); | |
09a4707e PS |
4185 | |
4186 | switch (mid->mid_state) { | |
4187 | case MID_RESPONSE_RECEIVED: | |
34f4deb7 PS |
4188 | credits.value = le16_to_cpu(shdr->CreditRequest); |
4189 | credits.instance = server->reconnect_instance; | |
09a4707e | 4190 | /* result already set, check signature */ |
4326ed2f | 4191 | if (server->sign && !mid->decrypted) { |
3c1bf7e4 PS |
4192 | int rc; |
4193 | ||
d08089f6 DH |
4194 | iov_iter_revert(&rqst.rq_iter, rdata->got_bytes); |
4195 | iov_iter_truncate(&rqst.rq_iter, rdata->got_bytes); | |
0b688cfc | 4196 | rc = smb2_verify_signature(&rqst, server); |
3c1bf7e4 | 4197 | if (rc) |
3175eb9b | 4198 | cifs_tcon_dbg(VFS, "SMB signature verification returned error = %d\n", |
f96637be | 4199 | rc); |
3c1bf7e4 | 4200 | } |
09a4707e | 4201 | /* FIXME: should this be counted toward the initiating task? */ |
34a54d61 PS |
4202 | task_io_account_read(rdata->got_bytes); |
4203 | cifs_stats_bytes_read(tcon, rdata->got_bytes); | |
09a4707e PS |
4204 | break; |
4205 | case MID_REQUEST_SUBMITTED: | |
4206 | case MID_RETRY_NEEDED: | |
4207 | rdata->result = -EAGAIN; | |
d913ed17 PS |
4208 | if (server->sign && rdata->got_bytes) |
4209 | /* reset bytes number since we can not check a sign */ | |
4210 | rdata->got_bytes = 0; | |
4211 | /* FIXME: should this be counted toward the initiating task? */ | |
4212 | task_io_account_read(rdata->got_bytes); | |
4213 | cifs_stats_bytes_read(tcon, rdata->got_bytes); | |
09a4707e | 4214 | break; |
0fd1d37b | 4215 | case MID_RESPONSE_MALFORMED: |
34f4deb7 PS |
4216 | credits.value = le16_to_cpu(shdr->CreditRequest); |
4217 | credits.instance = server->reconnect_instance; | |
30b5ae21 | 4218 | fallthrough; |
09a4707e | 4219 | default: |
6b15eb18 | 4220 | rdata->result = -EIO; |
09a4707e | 4221 | } |
bd3dcc6a LL |
4222 | #ifdef CONFIG_CIFS_SMB_DIRECT |
4223 | /* | |
4224 | * If this rdata has a memmory registered, the MR can be freed | |
4225 | * MR needs to be freed as soon as I/O finishes to prevent deadlock | |
4226 | * because they have limited number and are used for future I/Os | |
4227 | */ | |
4228 | if (rdata->mr) { | |
4229 | smbd_deregister_mr(rdata->mr); | |
4230 | rdata->mr = NULL; | |
4231 | } | |
4232 | #endif | |
082aaa87 | 4233 | if (rdata->result && rdata->result != -ENODATA) { |
09a4707e | 4234 | cifs_stats_fail_inc(tcon, SMB2_READ_HE); |
7d42e72f PS |
4235 | trace_smb3_read_err(0 /* xid */, |
4236 | rdata->cfile->fid.persistent_fid, | |
4237 | tcon->tid, tcon->ses->Suid, rdata->offset, | |
4238 | rdata->bytes, rdata->result); | |
4239 | } else | |
4240 | trace_smb3_read_done(0 /* xid */, | |
4241 | rdata->cfile->fid.persistent_fid, | |
4242 | tcon->tid, tcon->ses->Suid, | |
4243 | rdata->offset, rdata->got_bytes); | |
09a4707e PS |
4244 | |
4245 | queue_work(cifsiod_wq, &rdata->work); | |
70f08f91 | 4246 | release_mid(mid); |
34f4deb7 | 4247 | add_credits(server, &credits, 0); |
09a4707e PS |
4248 | } |
4249 | ||
738f9de5 | 4250 | /* smb2_async_readv - send an async read, and set up mid to handle result */ |
09a4707e PS |
4251 | int |
4252 | smb2_async_readv(struct cifs_readdata *rdata) | |
4253 | { | |
bed9da02 | 4254 | int rc, flags = 0; |
31473fc4 | 4255 | char *buf; |
0d35e382 | 4256 | struct smb2_hdr *shdr; |
09a4707e | 4257 | struct cifs_io_parms io_parms; |
738f9de5 | 4258 | struct smb_rqst rqst = { .rq_iov = rdata->iov, |
c713c877 | 4259 | .rq_nvec = 1 }; |
bed9da02 | 4260 | struct TCP_Server_Info *server; |
352d96f3 | 4261 | struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink); |
738f9de5 | 4262 | unsigned int total_len; |
5e90aa21 | 4263 | int credit_request; |
09a4707e | 4264 | |
f96637be JP |
4265 | cifs_dbg(FYI, "%s: offset=%llu bytes=%u\n", |
4266 | __func__, rdata->offset, rdata->bytes); | |
09a4707e | 4267 | |
352d96f3 AA |
4268 | if (!rdata->server) |
4269 | rdata->server = cifs_pick_channel(tcon->ses); | |
4270 | ||
09a4707e | 4271 | io_parms.tcon = tlink_tcon(rdata->cfile->tlink); |
352d96f3 | 4272 | io_parms.server = server = rdata->server; |
09a4707e PS |
4273 | io_parms.offset = rdata->offset; |
4274 | io_parms.length = rdata->bytes; | |
4275 | io_parms.persistent_fid = rdata->cfile->fid.persistent_fid; | |
4276 | io_parms.volatile_fid = rdata->cfile->fid.volatile_fid; | |
4277 | io_parms.pid = rdata->pid; | |
bed9da02 | 4278 | |
2dabfd5b LL |
4279 | rc = smb2_new_read_req( |
4280 | (void **) &buf, &total_len, &io_parms, rdata, 0, 0); | |
f0b93cb9 | 4281 | if (rc) |
09a4707e PS |
4282 | return rc; |
4283 | ||
5a77e75f | 4284 | if (smb3_encryption_required(io_parms.tcon)) |
7fb8986e PS |
4285 | flags |= CIFS_TRANSFORM_REQ; |
4286 | ||
c713c877 RS |
4287 | rdata->iov[0].iov_base = buf; |
4288 | rdata->iov[0].iov_len = total_len; | |
b8f57ee8 | 4289 | |
0d35e382 | 4290 | shdr = (struct smb2_hdr *)buf; |
09a4707e | 4291 | |
335b7b62 | 4292 | if (rdata->credits.value > 0) { |
31473fc4 | 4293 | shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(rdata->bytes, |
bed9da02 | 4294 | SMB2_MAX_BUFFER_SIZE)); |
5e90aa21 SP |
4295 | credit_request = le16_to_cpu(shdr->CreditCharge) + 8; |
4296 | if (server->credits >= server->max_credits) | |
4297 | shdr->CreditRequest = cpu_to_le16(0); | |
4298 | else | |
4299 | shdr->CreditRequest = cpu_to_le16( | |
4300 | min_t(int, server->max_credits - | |
4301 | server->credits, credit_request)); | |
9a1c67e8 PS |
4302 | |
4303 | rc = adjust_credits(server, &rdata->credits, rdata->bytes); | |
4304 | if (rc) | |
335b7b62 | 4305 | goto async_readv_out; |
9a1c67e8 | 4306 | |
7fb8986e | 4307 | flags |= CIFS_HAS_CREDITS; |
bed9da02 PS |
4308 | } |
4309 | ||
09a4707e | 4310 | kref_get(&rdata->refcount); |
352d96f3 | 4311 | rc = cifs_call_async(server, &rqst, |
09a4707e | 4312 | cifs_readv_receive, smb2_readv_callback, |
3349c3a7 PS |
4313 | smb3_handle_read_data, rdata, flags, |
4314 | &rdata->credits); | |
e5d04887 | 4315 | if (rc) { |
09a4707e | 4316 | kref_put(&rdata->refcount, cifs_readdata_release); |
e5d04887 | 4317 | cifs_stats_fail_inc(io_parms.tcon, SMB2_READ_HE); |
7d42e72f PS |
4318 | trace_smb3_read_err(0 /* xid */, io_parms.persistent_fid, |
4319 | io_parms.tcon->tid, | |
4320 | io_parms.tcon->ses->Suid, | |
4321 | io_parms.offset, io_parms.length, rc); | |
4322 | } | |
09a4707e | 4323 | |
335b7b62 | 4324 | async_readv_out: |
09a4707e PS |
4325 | cifs_small_buf_release(buf); |
4326 | return rc; | |
4327 | } | |
33319141 | 4328 | |
d8e05039 PS |
4329 | int |
4330 | SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms, | |
4331 | unsigned int *nbytes, char **buf, int *buf_type) | |
4332 | { | |
40eff45b | 4333 | struct smb_rqst rqst; |
1efd4fc7 | 4334 | int resp_buftype, rc; |
d8d9de53 | 4335 | struct smb2_read_req *req = NULL; |
d8e05039 | 4336 | struct smb2_read_rsp *rsp = NULL; |
f5688a6d | 4337 | struct kvec iov[1]; |
da502f7d | 4338 | struct kvec rsp_iov; |
738f9de5 | 4339 | unsigned int total_len; |
7fb8986e PS |
4340 | int flags = CIFS_LOG_ERROR; |
4341 | struct cifs_ses *ses = io_parms->tcon->ses; | |
d8e05039 | 4342 | |
352d96f3 AA |
4343 | if (!io_parms->server) |
4344 | io_parms->server = cifs_pick_channel(io_parms->tcon->ses); | |
4345 | ||
d8e05039 | 4346 | *nbytes = 0; |
2dabfd5b | 4347 | rc = smb2_new_read_req((void **)&req, &total_len, io_parms, NULL, 0, 0); |
d8e05039 PS |
4348 | if (rc) |
4349 | return rc; | |
4350 | ||
5a77e75f | 4351 | if (smb3_encryption_required(io_parms->tcon)) |
7fb8986e PS |
4352 | flags |= CIFS_TRANSFORM_REQ; |
4353 | ||
f5688a6d RS |
4354 | iov[0].iov_base = (char *)req; |
4355 | iov[0].iov_len = total_len; | |
b8f57ee8 | 4356 | |
40eff45b RS |
4357 | memset(&rqst, 0, sizeof(struct smb_rqst)); |
4358 | rqst.rq_iov = iov; | |
4359 | rqst.rq_nvec = 1; | |
4360 | ||
352d96f3 AA |
4361 | rc = cifs_send_recv(xid, ses, io_parms->server, |
4362 | &rqst, &resp_buftype, flags, &rsp_iov); | |
da502f7d | 4363 | rsp = (struct smb2_read_rsp *)rsp_iov.iov_base; |
d8e05039 | 4364 | |
a821df3f RS |
4365 | if (rc) { |
4366 | if (rc != -ENODATA) { | |
4367 | cifs_stats_fail_inc(io_parms->tcon, SMB2_READ_HE); | |
4368 | cifs_dbg(VFS, "Send error in read = %d\n", rc); | |
d8d9de53 | 4369 | trace_smb3_read_err(xid, |
351a59da | 4370 | req->PersistentFileId, |
7d42e72f PS |
4371 | io_parms->tcon->tid, ses->Suid, |
4372 | io_parms->offset, io_parms->length, | |
4373 | rc); | |
b0a42f2a | 4374 | } else |
351a59da PA |
4375 | trace_smb3_read_done(xid, req->PersistentFileId, io_parms->tcon->tid, |
4376 | ses->Suid, io_parms->offset, 0); | |
da502f7d | 4377 | free_rsp_buf(resp_buftype, rsp_iov.iov_base); |
05fd5c2c | 4378 | cifs_small_buf_release(req); |
a821df3f | 4379 | return rc == -ENODATA ? 0 : rc; |
eccb4422 | 4380 | } else |
d8d9de53 | 4381 | trace_smb3_read_done(xid, |
351a59da | 4382 | req->PersistentFileId, |
eccb4422 SF |
4383 | io_parms->tcon->tid, ses->Suid, |
4384 | io_parms->offset, io_parms->length); | |
d8e05039 | 4385 | |
088aaf17 Z |
4386 | cifs_small_buf_release(req); |
4387 | ||
a821df3f RS |
4388 | *nbytes = le32_to_cpu(rsp->DataLength); |
4389 | if ((*nbytes > CIFS_MAX_MSGSIZE) || | |
4390 | (*nbytes > io_parms->length)) { | |
4391 | cifs_dbg(FYI, "bad length %d for count %d\n", | |
4392 | *nbytes, io_parms->length); | |
4393 | rc = -EIO; | |
4394 | *nbytes = 0; | |
d8e05039 PS |
4395 | } |
4396 | ||
4397 | if (*buf) { | |
977b6170 | 4398 | memcpy(*buf, (char *)rsp + rsp->DataOffset, *nbytes); |
da502f7d | 4399 | free_rsp_buf(resp_buftype, rsp_iov.iov_base); |
d8e05039 | 4400 | } else if (resp_buftype != CIFS_NO_BUFFER) { |
da502f7d | 4401 | *buf = rsp_iov.iov_base; |
d8e05039 PS |
4402 | if (resp_buftype == CIFS_SMALL_BUFFER) |
4403 | *buf_type = CIFS_SMALL_BUFFER; | |
4404 | else if (resp_buftype == CIFS_LARGE_BUFFER) | |
4405 | *buf_type = CIFS_LARGE_BUFFER; | |
4406 | } | |
4407 | return rc; | |
4408 | } | |
4409 | ||
33319141 PS |
4410 | /* |
4411 | * Check the mid_state and signature on received buffer (if any), and queue the | |
4412 | * workqueue completion task. | |
4413 | */ | |
4414 | static void | |
4415 | smb2_writev_callback(struct mid_q_entry *mid) | |
4416 | { | |
4417 | struct cifs_writedata *wdata = mid->callback_data; | |
4418 | struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink); | |
352d96f3 | 4419 | struct TCP_Server_Info *server = wdata->server; |
33319141 PS |
4420 | unsigned int written; |
4421 | struct smb2_write_rsp *rsp = (struct smb2_write_rsp *)mid->resp_buf; | |
34f4deb7 | 4422 | struct cifs_credits credits = { .value = 0, .instance = 0 }; |
33319141 | 4423 | |
352d96f3 AA |
4424 | WARN_ONCE(wdata->server != mid->server, |
4425 | "wdata server %p != mid server %p", | |
4426 | wdata->server, mid->server); | |
4427 | ||
33319141 PS |
4428 | switch (mid->mid_state) { |
4429 | case MID_RESPONSE_RECEIVED: | |
0d35e382 | 4430 | credits.value = le16_to_cpu(rsp->hdr.CreditRequest); |
34f4deb7 PS |
4431 | credits.instance = server->reconnect_instance; |
4432 | wdata->result = smb2_check_receive(mid, server, 0); | |
33319141 PS |
4433 | if (wdata->result != 0) |
4434 | break; | |
4435 | ||
4436 | written = le32_to_cpu(rsp->DataLength); | |
4437 | /* | |
4438 | * Mask off high 16 bits when bytes written as returned | |
4439 | * by the server is greater than bytes requested by the | |
4440 | * client. OS/2 servers are known to set incorrect | |
4441 | * CountHigh values. | |
4442 | */ | |
4443 | if (written > wdata->bytes) | |
4444 | written &= 0xFFFF; | |
4445 | ||
4446 | if (written < wdata->bytes) | |
4447 | wdata->result = -ENOSPC; | |
4448 | else | |
4449 | wdata->bytes = written; | |
4450 | break; | |
4451 | case MID_REQUEST_SUBMITTED: | |
4452 | case MID_RETRY_NEEDED: | |
4453 | wdata->result = -EAGAIN; | |
4454 | break; | |
0fd1d37b | 4455 | case MID_RESPONSE_MALFORMED: |
0d35e382 | 4456 | credits.value = le16_to_cpu(rsp->hdr.CreditRequest); |
34f4deb7 | 4457 | credits.instance = server->reconnect_instance; |
30b5ae21 | 4458 | fallthrough; |
33319141 PS |
4459 | default: |
4460 | wdata->result = -EIO; | |
4461 | break; | |
4462 | } | |
db223a59 LL |
4463 | #ifdef CONFIG_CIFS_SMB_DIRECT |
4464 | /* | |
4465 | * If this wdata has a memory registered, the MR can be freed | |
4466 | * The number of MRs available is limited, it's important to recover | |
4467 | * used MR as soon as I/O is finished. Hold MR longer in the later | |
4468 | * I/O process can possibly result in I/O deadlock due to lack of MR | |
4469 | * to send request on I/O retry | |
4470 | */ | |
4471 | if (wdata->mr) { | |
4472 | smbd_deregister_mr(wdata->mr); | |
4473 | wdata->mr = NULL; | |
4474 | } | |
4475 | #endif | |
7d42e72f | 4476 | if (wdata->result) { |
33319141 | 4477 | cifs_stats_fail_inc(tcon, SMB2_WRITE_HE); |
7d42e72f PS |
4478 | trace_smb3_write_err(0 /* no xid */, |
4479 | wdata->cfile->fid.persistent_fid, | |
4480 | tcon->tid, tcon->ses->Suid, wdata->offset, | |
4481 | wdata->bytes, wdata->result); | |
d6fd4190 | 4482 | if (wdata->result == -ENOSPC) |
a0a3036b | 4483 | pr_warn_once("Out of space writing to %s\n", |
68e14569 | 4484 | tcon->tree_name); |
7d42e72f PS |
4485 | } else |
4486 | trace_smb3_write_done(0 /* no xid */, | |
4487 | wdata->cfile->fid.persistent_fid, | |
4488 | tcon->tid, tcon->ses->Suid, | |
4489 | wdata->offset, wdata->bytes); | |
33319141 PS |
4490 | |
4491 | queue_work(cifsiod_wq, &wdata->work); | |
70f08f91 | 4492 | release_mid(mid); |
34f4deb7 | 4493 | add_credits(server, &credits, 0); |
33319141 PS |
4494 | } |
4495 | ||
4496 | /* smb2_async_writev - send an async write, and set up mid to handle result */ | |
4497 | int | |
4a5c80d7 SF |
4498 | smb2_async_writev(struct cifs_writedata *wdata, |
4499 | void (*release)(struct kref *kref)) | |
33319141 | 4500 | { |
cb7e9eab | 4501 | int rc = -EACCES, flags = 0; |
33319141 | 4502 | struct smb2_write_req *req = NULL; |
0d35e382 | 4503 | struct smb2_hdr *shdr; |
33319141 | 4504 | struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink); |
352d96f3 | 4505 | struct TCP_Server_Info *server = wdata->server; |
c713c877 | 4506 | struct kvec iov[1]; |
738f9de5 | 4507 | struct smb_rqst rqst = { }; |
f5688a6d | 4508 | unsigned int total_len; |
d643a8a4 SM |
4509 | struct cifs_io_parms _io_parms; |
4510 | struct cifs_io_parms *io_parms = NULL; | |
5e90aa21 | 4511 | int credit_request; |
33319141 | 4512 | |
352d96f3 AA |
4513 | if (!wdata->server) |
4514 | server = wdata->server = cifs_pick_channel(tcon->ses); | |
4515 | ||
d643a8a4 SM |
4516 | /* |
4517 | * in future we may get cifs_io_parms passed in from the caller, | |
4518 | * but for now we construct it here... | |
4519 | */ | |
4520 | _io_parms = (struct cifs_io_parms) { | |
4521 | .tcon = tcon, | |
4522 | .server = server, | |
4523 | .offset = wdata->offset, | |
4524 | .length = wdata->bytes, | |
4525 | .persistent_fid = wdata->cfile->fid.persistent_fid, | |
4526 | .volatile_fid = wdata->cfile->fid.volatile_fid, | |
4527 | .pid = wdata->pid, | |
4528 | }; | |
4529 | io_parms = &_io_parms; | |
4530 | ||
352d96f3 AA |
4531 | rc = smb2_plain_req_init(SMB2_WRITE, tcon, server, |
4532 | (void **) &req, &total_len); | |
f0b93cb9 PS |
4533 | if (rc) |
4534 | return rc; | |
33319141 | 4535 | |
5a77e75f | 4536 | if (smb3_encryption_required(tcon)) |
7fb8986e PS |
4537 | flags |= CIFS_TRANSFORM_REQ; |
4538 | ||
0d35e382 | 4539 | shdr = (struct smb2_hdr *)req; |
d643a8a4 | 4540 | shdr->Id.SyncId.ProcessId = cpu_to_le32(io_parms->pid); |
33319141 | 4541 | |
d643a8a4 SM |
4542 | req->PersistentFileId = io_parms->persistent_fid; |
4543 | req->VolatileFileId = io_parms->volatile_fid; | |
33319141 PS |
4544 | req->WriteChannelInfoOffset = 0; |
4545 | req->WriteChannelInfoLength = 0; | |
d08089f6 | 4546 | req->Channel = SMB2_CHANNEL_NONE; |
d643a8a4 | 4547 | req->Offset = cpu_to_le64(io_parms->offset); |
33319141 | 4548 | req->DataOffset = cpu_to_le16( |
f5688a6d | 4549 | offsetof(struct smb2_write_req, Buffer)); |
33319141 | 4550 | req->RemainingBytes = 0; |
d323c246 | 4551 | |
d643a8a4 SM |
4552 | trace_smb3_write_enter(0 /* xid */, |
4553 | io_parms->persistent_fid, | |
4554 | io_parms->tcon->tid, | |
4555 | io_parms->tcon->ses->Suid, | |
4556 | io_parms->offset, | |
4557 | io_parms->length); | |
4558 | ||
db223a59 LL |
4559 | #ifdef CONFIG_CIFS_SMB_DIRECT |
4560 | /* | |
4561 | * If we want to do a server RDMA read, fill in and append | |
4562 | * smbd_buffer_descriptor_v1 to the end of write request | |
4563 | */ | |
a6559cc1 | 4564 | if (smb3_use_rdma_offload(io_parms)) { |
db223a59 | 4565 | struct smbd_buffer_descriptor_v1 *v1; |
d08089f6 | 4566 | size_t data_size = iov_iter_count(&wdata->iter); |
db223a59 LL |
4567 | bool need_invalidate = server->dialect == SMB30_PROT_ID; |
4568 | ||
d08089f6 DH |
4569 | wdata->mr = smbd_register_mr(server->smbd_conn, &wdata->iter, |
4570 | false, need_invalidate); | |
db223a59 | 4571 | if (!wdata->mr) { |
b7972092 | 4572 | rc = -EAGAIN; |
db223a59 LL |
4573 | goto async_writev_out; |
4574 | } | |
4575 | req->Length = 0; | |
4576 | req->DataOffset = 0; | |
d08089f6 | 4577 | req->RemainingBytes = cpu_to_le32(data_size); |
db223a59 LL |
4578 | req->Channel = SMB2_CHANNEL_RDMA_V1_INVALIDATE; |
4579 | if (need_invalidate) | |
4580 | req->Channel = SMB2_CHANNEL_RDMA_V1; | |
4581 | req->WriteChannelInfoOffset = | |
2026b06e | 4582 | cpu_to_le16(offsetof(struct smb2_write_req, Buffer)); |
db223a59 | 4583 | req->WriteChannelInfoLength = |
2026b06e | 4584 | cpu_to_le16(sizeof(struct smbd_buffer_descriptor_v1)); |
db223a59 | 4585 | v1 = (struct smbd_buffer_descriptor_v1 *) &req->Buffer[0]; |
2026b06e SF |
4586 | v1->offset = cpu_to_le64(wdata->mr->mr->iova); |
4587 | v1->token = cpu_to_le32(wdata->mr->mr->rkey); | |
4588 | v1->length = cpu_to_le32(wdata->mr->mr->length); | |
db223a59 LL |
4589 | } |
4590 | #endif | |
c713c877 RS |
4591 | iov[0].iov_len = total_len - 1; |
4592 | iov[0].iov_base = (char *)req; | |
33319141 | 4593 | |
738f9de5 | 4594 | rqst.rq_iov = iov; |
c713c877 | 4595 | rqst.rq_nvec = 1; |
d08089f6 DH |
4596 | rqst.rq_iter = wdata->iter; |
4597 | rqst.rq_iter_size = iov_iter_count(&rqst.rq_iter); | |
db223a59 | 4598 | #ifdef CONFIG_CIFS_SMB_DIRECT |
d08089f6 | 4599 | if (wdata->mr) |
c713c877 | 4600 | iov[0].iov_len += sizeof(struct smbd_buffer_descriptor_v1); |
db223a59 | 4601 | #endif |
d08089f6 DH |
4602 | cifs_dbg(FYI, "async write at %llu %u bytes iter=%zx\n", |
4603 | io_parms->offset, io_parms->length, iov_iter_count(&rqst.rq_iter)); | |
33319141 | 4604 | |
db223a59 LL |
4605 | #ifdef CONFIG_CIFS_SMB_DIRECT |
4606 | /* For RDMA read, I/O size is in RemainingBytes not in Length */ | |
4607 | if (!wdata->mr) | |
d643a8a4 | 4608 | req->Length = cpu_to_le32(io_parms->length); |
db223a59 | 4609 | #else |
d643a8a4 | 4610 | req->Length = cpu_to_le32(io_parms->length); |
db223a59 | 4611 | #endif |
33319141 | 4612 | |
335b7b62 | 4613 | if (wdata->credits.value > 0) { |
31473fc4 | 4614 | shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(wdata->bytes, |
cb7e9eab | 4615 | SMB2_MAX_BUFFER_SIZE)); |
5e90aa21 SP |
4616 | credit_request = le16_to_cpu(shdr->CreditCharge) + 8; |
4617 | if (server->credits >= server->max_credits) | |
4618 | shdr->CreditRequest = cpu_to_le16(0); | |
4619 | else | |
4620 | shdr->CreditRequest = cpu_to_le16( | |
4621 | min_t(int, server->max_credits - | |
4622 | server->credits, credit_request)); | |
9a1c67e8 | 4623 | |
d643a8a4 | 4624 | rc = adjust_credits(server, &wdata->credits, io_parms->length); |
9a1c67e8 | 4625 | if (rc) |
335b7b62 | 4626 | goto async_writev_out; |
9a1c67e8 | 4627 | |
7fb8986e | 4628 | flags |= CIFS_HAS_CREDITS; |
cb7e9eab PS |
4629 | } |
4630 | ||
33319141 | 4631 | kref_get(&wdata->refcount); |
9b7c18a2 | 4632 | rc = cifs_call_async(server, &rqst, NULL, smb2_writev_callback, NULL, |
3349c3a7 | 4633 | wdata, flags, &wdata->credits); |
33319141 | 4634 | |
e5d04887 | 4635 | if (rc) { |
d8d9de53 | 4636 | trace_smb3_write_err(0 /* no xid */, |
d643a8a4 SM |
4637 | io_parms->persistent_fid, |
4638 | io_parms->tcon->tid, | |
4639 | io_parms->tcon->ses->Suid, | |
4640 | io_parms->offset, | |
4641 | io_parms->length, | |
4642 | rc); | |
4a5c80d7 | 4643 | kref_put(&wdata->refcount, release); |
e5d04887 | 4644 | cifs_stats_fail_inc(tcon, SMB2_WRITE_HE); |
7d42e72f | 4645 | } |
33319141 | 4646 | |
33319141 PS |
4647 | async_writev_out: |
4648 | cifs_small_buf_release(req); | |
33319141 PS |
4649 | return rc; |
4650 | } | |
009d3443 PS |
4651 | |
4652 | /* | |
4653 | * SMB2_write function gets iov pointer to kvec array with n_vec as a length. | |
4654 | * The length field from io_parms must be at least 1 and indicates a number of | |
4655 | * elements with data to write that begins with position 1 in iov array. All | |
4656 | * data length is specified by count. | |
4657 | */ | |
4658 | int | |
4659 | SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms, | |
4660 | unsigned int *nbytes, struct kvec *iov, int n_vec) | |
4661 | { | |
40eff45b | 4662 | struct smb_rqst rqst; |
009d3443 PS |
4663 | int rc = 0; |
4664 | struct smb2_write_req *req = NULL; | |
4665 | struct smb2_write_rsp *rsp = NULL; | |
4666 | int resp_buftype; | |
da502f7d | 4667 | struct kvec rsp_iov; |
7fb8986e | 4668 | int flags = 0; |
f5688a6d | 4669 | unsigned int total_len; |
352d96f3 | 4670 | struct TCP_Server_Info *server; |
da502f7d | 4671 | |
009d3443 PS |
4672 | *nbytes = 0; |
4673 | ||
4674 | if (n_vec < 1) | |
4675 | return rc; | |
4676 | ||
352d96f3 AA |
4677 | if (!io_parms->server) |
4678 | io_parms->server = cifs_pick_channel(io_parms->tcon->ses); | |
4679 | server = io_parms->server; | |
4680 | if (server == NULL) | |
4681 | return -ECONNABORTED; | |
4682 | ||
4683 | rc = smb2_plain_req_init(SMB2_WRITE, io_parms->tcon, server, | |
4684 | (void **) &req, &total_len); | |
009d3443 PS |
4685 | if (rc) |
4686 | return rc; | |
4687 | ||
5a77e75f | 4688 | if (smb3_encryption_required(io_parms->tcon)) |
7fb8986e PS |
4689 | flags |= CIFS_TRANSFORM_REQ; |
4690 | ||
0d35e382 | 4691 | req->hdr.Id.SyncId.ProcessId = cpu_to_le32(io_parms->pid); |
009d3443 | 4692 | |
351a59da PA |
4693 | req->PersistentFileId = io_parms->persistent_fid; |
4694 | req->VolatileFileId = io_parms->volatile_fid; | |
009d3443 PS |
4695 | req->WriteChannelInfoOffset = 0; |
4696 | req->WriteChannelInfoLength = 0; | |
4697 | req->Channel = 0; | |
4698 | req->Length = cpu_to_le32(io_parms->length); | |
4699 | req->Offset = cpu_to_le64(io_parms->offset); | |
009d3443 | 4700 | req->DataOffset = cpu_to_le16( |
f5688a6d | 4701 | offsetof(struct smb2_write_req, Buffer)); |
009d3443 PS |
4702 | req->RemainingBytes = 0; |
4703 | ||
d323c246 SF |
4704 | trace_smb3_write_enter(xid, io_parms->persistent_fid, |
4705 | io_parms->tcon->tid, io_parms->tcon->ses->Suid, | |
4706 | io_parms->offset, io_parms->length); | |
4707 | ||
009d3443 | 4708 | iov[0].iov_base = (char *)req; |
f5688a6d RS |
4709 | /* 1 for Buffer */ |
4710 | iov[0].iov_len = total_len - 1; | |
009d3443 | 4711 | |
40eff45b RS |
4712 | memset(&rqst, 0, sizeof(struct smb_rqst)); |
4713 | rqst.rq_iov = iov; | |
4714 | rqst.rq_nvec = n_vec + 1; | |
4715 | ||
352d96f3 AA |
4716 | rc = cifs_send_recv(xid, io_parms->tcon->ses, server, |
4717 | &rqst, | |
f5688a6d | 4718 | &resp_buftype, flags, &rsp_iov); |
da502f7d | 4719 | rsp = (struct smb2_write_rsp *)rsp_iov.iov_base; |
009d3443 PS |
4720 | |
4721 | if (rc) { | |
d8d9de53 | 4722 | trace_smb3_write_err(xid, |
351a59da | 4723 | req->PersistentFileId, |
eccb4422 SF |
4724 | io_parms->tcon->tid, |
4725 | io_parms->tcon->ses->Suid, | |
4726 | io_parms->offset, io_parms->length, rc); | |
009d3443 | 4727 | cifs_stats_fail_inc(io_parms->tcon, SMB2_WRITE_HE); |
f96637be | 4728 | cifs_dbg(VFS, "Send error in write = %d\n", rc); |
eccb4422 | 4729 | } else { |
009d3443 | 4730 | *nbytes = le32_to_cpu(rsp->DataLength); |
d8d9de53 | 4731 | trace_smb3_write_done(xid, |
351a59da | 4732 | req->PersistentFileId, |
d8d9de53 RS |
4733 | io_parms->tcon->tid, |
4734 | io_parms->tcon->ses->Suid, | |
4735 | io_parms->offset, *nbytes); | |
eccb4422 | 4736 | } |
e5d04887 | 4737 | |
6a3eb336 | 4738 | cifs_small_buf_release(req); |
e5d04887 | 4739 | free_rsp_buf(resp_buftype, rsp); |
009d3443 PS |
4740 | return rc; |
4741 | } | |
35143eb5 | 4742 | |
69dda305 | 4743 | int posix_info_sid_size(const void *beg, const void *end) |
349e13ad AA |
4744 | { |
4745 | size_t subauth; | |
4746 | int total; | |
4747 | ||
4748 | if (beg + 1 > end) | |
4749 | return -1; | |
4750 | ||
4751 | subauth = *(u8 *)(beg+1); | |
4752 | if (subauth < 1 || subauth > 15) | |
4753 | return -1; | |
4754 | ||
4755 | total = 1 + 1 + 6 + 4*subauth; | |
4756 | if (beg + total > end) | |
4757 | return -1; | |
4758 | ||
4759 | return total; | |
4760 | } | |
4761 | ||
4762 | int posix_info_parse(const void *beg, const void *end, | |
4763 | struct smb2_posix_info_parsed *out) | |
4764 | ||
4765 | { | |
4766 | int total_len = 0; | |
ca38fabc | 4767 | int owner_len, group_len; |
349e13ad AA |
4768 | int name_len; |
4769 | const void *owner_sid; | |
4770 | const void *group_sid; | |
4771 | const void *name; | |
4772 | ||
4773 | /* if no end bound given, assume payload to be correct */ | |
4774 | if (!end) { | |
4775 | const struct smb2_posix_info *p = beg; | |
4776 | ||
4777 | end = beg + le32_to_cpu(p->NextEntryOffset); | |
4778 | /* last element will have a 0 offset, pick a sensible bound */ | |
4779 | if (end == beg) | |
4780 | end += 0xFFFF; | |
4781 | } | |
4782 | ||
4783 | /* check base buf */ | |
4784 | if (beg + sizeof(struct smb2_posix_info) > end) | |
4785 | return -1; | |
4786 | total_len = sizeof(struct smb2_posix_info); | |
4787 | ||
4788 | /* check owner sid */ | |
4789 | owner_sid = beg + total_len; | |
ca38fabc RS |
4790 | owner_len = posix_info_sid_size(owner_sid, end); |
4791 | if (owner_len < 0) | |
349e13ad | 4792 | return -1; |
ca38fabc | 4793 | total_len += owner_len; |
349e13ad AA |
4794 | |
4795 | /* check group sid */ | |
4796 | group_sid = beg + total_len; | |
ca38fabc RS |
4797 | group_len = posix_info_sid_size(group_sid, end); |
4798 | if (group_len < 0) | |
349e13ad | 4799 | return -1; |
ca38fabc | 4800 | total_len += group_len; |
349e13ad AA |
4801 | |
4802 | /* check name len */ | |
4803 | if (beg + total_len + 4 > end) | |
4804 | return -1; | |
4805 | name_len = le32_to_cpu(*(__le32 *)(beg + total_len)); | |
4806 | if (name_len < 1 || name_len > 0xFFFF) | |
4807 | return -1; | |
4808 | total_len += 4; | |
4809 | ||
4810 | /* check name */ | |
4811 | name = beg + total_len; | |
4812 | if (name + name_len > end) | |
4813 | return -1; | |
4814 | total_len += name_len; | |
4815 | ||
4816 | if (out) { | |
4817 | out->base = beg; | |
4818 | out->size = total_len; | |
4819 | out->name_len = name_len; | |
4820 | out->name = name; | |
ca38fabc RS |
4821 | memcpy(&out->owner, owner_sid, owner_len); |
4822 | memcpy(&out->group, group_sid, group_len); | |
349e13ad AA |
4823 | } |
4824 | return total_len; | |
4825 | } | |
4826 | ||
4827 | static int posix_info_extra_size(const void *beg, const void *end) | |
4828 | { | |
4829 | int len = posix_info_parse(beg, end, NULL); | |
4830 | ||
4831 | if (len < 0) | |
4832 | return -1; | |
4833 | return len - sizeof(struct smb2_posix_info); | |
4834 | } | |
4835 | ||
d324f08d | 4836 | static unsigned int |
3d519bd1 AA |
4837 | num_entries(int infotype, char *bufstart, char *end_of_buf, char **lastentry, |
4838 | size_t size) | |
d324f08d PS |
4839 | { |
4840 | int len; | |
4841 | unsigned int entrycount = 0; | |
4842 | unsigned int next_offset = 0; | |
56446f21 DC |
4843 | char *entryptr; |
4844 | FILE_DIRECTORY_INFO *dir_info; | |
d324f08d PS |
4845 | |
4846 | if (bufstart == NULL) | |
4847 | return 0; | |
4848 | ||
56446f21 | 4849 | entryptr = bufstart; |
d324f08d PS |
4850 | |
4851 | while (1) { | |
56446f21 DC |
4852 | if (entryptr + next_offset < entryptr || |
4853 | entryptr + next_offset > end_of_buf || | |
4854 | entryptr + next_offset + size > end_of_buf) { | |
f96637be | 4855 | cifs_dbg(VFS, "malformed search entry would overflow\n"); |
d324f08d PS |
4856 | break; |
4857 | } | |
4858 | ||
56446f21 DC |
4859 | entryptr = entryptr + next_offset; |
4860 | dir_info = (FILE_DIRECTORY_INFO *)entryptr; | |
4861 | ||
3d519bd1 AA |
4862 | if (infotype == SMB_FIND_FILE_POSIX_INFO) |
4863 | len = posix_info_extra_size(entryptr, end_of_buf); | |
4864 | else | |
4865 | len = le32_to_cpu(dir_info->FileNameLength); | |
4866 | ||
4867 | if (len < 0 || | |
4868 | entryptr + len < entryptr || | |
56446f21 DC |
4869 | entryptr + len > end_of_buf || |
4870 | entryptr + len + size > end_of_buf) { | |
f96637be JP |
4871 | cifs_dbg(VFS, "directory entry name would overflow frame end of buf %p\n", |
4872 | end_of_buf); | |
d324f08d PS |
4873 | break; |
4874 | } | |
4875 | ||
56446f21 | 4876 | *lastentry = entryptr; |
d324f08d PS |
4877 | entrycount++; |
4878 | ||
56446f21 | 4879 | next_offset = le32_to_cpu(dir_info->NextEntryOffset); |
d324f08d PS |
4880 | if (!next_offset) |
4881 | break; | |
4882 | } | |
4883 | ||
4884 | return entrycount; | |
4885 | } | |
4886 | ||
4887 | /* | |
4888 | * Readdir/FindFirst | |
4889 | */ | |
0a17799c | 4890 | int SMB2_query_directory_init(const unsigned int xid, |
352d96f3 AA |
4891 | struct cifs_tcon *tcon, |
4892 | struct TCP_Server_Info *server, | |
4893 | struct smb_rqst *rqst, | |
0a17799c RS |
4894 | u64 persistent_fid, u64 volatile_fid, |
4895 | int index, int info_level) | |
d324f08d PS |
4896 | { |
4897 | struct smb2_query_directory_req *req; | |
d324f08d | 4898 | unsigned char *bufptr; |
d324f08d | 4899 | __le16 asteriks = cpu_to_le16('*'); |
0a17799c RS |
4900 | unsigned int output_size = CIFSMaxBufSize - |
4901 | MAX_SMB2_CREATE_RESPONSE_SIZE - | |
4902 | MAX_SMB2_CLOSE_RESPONSE_SIZE; | |
7c00c3a6 | 4903 | unsigned int total_len; |
0a17799c RS |
4904 | struct kvec *iov = rqst->rq_iov; |
4905 | int len, rc; | |
d324f08d | 4906 | |
352d96f3 AA |
4907 | rc = smb2_plain_req_init(SMB2_QUERY_DIRECTORY, tcon, server, |
4908 | (void **) &req, &total_len); | |
d324f08d PS |
4909 | if (rc) |
4910 | return rc; | |
4911 | ||
0a17799c | 4912 | switch (info_level) { |
d324f08d PS |
4913 | case SMB_FIND_FILE_DIRECTORY_INFO: |
4914 | req->FileInformationClass = FILE_DIRECTORY_INFORMATION; | |
d324f08d PS |
4915 | break; |
4916 | case SMB_FIND_FILE_ID_FULL_DIR_INFO: | |
4917 | req->FileInformationClass = FILEID_FULL_DIRECTORY_INFORMATION; | |
d324f08d | 4918 | break; |
3d519bd1 AA |
4919 | case SMB_FIND_FILE_POSIX_INFO: |
4920 | req->FileInformationClass = SMB_FIND_FILE_POSIX_INFO; | |
4921 | break; | |
d324f08d | 4922 | default: |
3175eb9b | 4923 | cifs_tcon_dbg(VFS, "info level %u isn't supported\n", |
0a17799c RS |
4924 | info_level); |
4925 | return -EINVAL; | |
d324f08d PS |
4926 | } |
4927 | ||
4928 | req->FileIndex = cpu_to_le32(index); | |
4929 | req->PersistentFileId = persistent_fid; | |
4930 | req->VolatileFileId = volatile_fid; | |
4931 | ||
4932 | len = 0x2; | |
4933 | bufptr = req->Buffer; | |
4934 | memcpy(bufptr, &asteriks, len); | |
4935 | ||
4936 | req->FileNameOffset = | |
eb3e28c1 | 4937 | cpu_to_le16(sizeof(struct smb2_query_directory_req)); |
d324f08d PS |
4938 | req->FileNameLength = cpu_to_le16(len); |
4939 | /* | |
4940 | * BB could be 30 bytes or so longer if we used SMB2 specific | |
4941 | * buffer lengths, but this is safe and close enough. | |
4942 | */ | |
4943 | output_size = min_t(unsigned int, output_size, server->maxBuf); | |
4944 | output_size = min_t(unsigned int, output_size, 2 << 15); | |
4945 | req->OutputBufferLength = cpu_to_le32(output_size); | |
4946 | ||
4947 | iov[0].iov_base = (char *)req; | |
7c00c3a6 RS |
4948 | /* 1 for Buffer */ |
4949 | iov[0].iov_len = total_len - 1; | |
d324f08d PS |
4950 | |
4951 | iov[1].iov_base = (char *)(req->Buffer); | |
4952 | iov[1].iov_len = len; | |
4953 | ||
0a17799c RS |
4954 | trace_smb3_query_dir_enter(xid, persistent_fid, tcon->tid, |
4955 | tcon->ses->Suid, index, output_size); | |
4956 | ||
4957 | return 0; | |
4958 | } | |
4959 | ||
4960 | void SMB2_query_directory_free(struct smb_rqst *rqst) | |
4961 | { | |
4962 | if (rqst && rqst->rq_iov) { | |
4963 | cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */ | |
4964 | } | |
4965 | } | |
4966 | ||
af08f9e7 RS |
4967 | int |
4968 | smb2_parse_query_directory(struct cifs_tcon *tcon, | |
4969 | struct kvec *rsp_iov, | |
4970 | int resp_buftype, | |
4971 | struct cifs_search_info *srch_inf) | |
4972 | { | |
4973 | struct smb2_query_directory_rsp *rsp; | |
4974 | size_t info_buf_size; | |
4975 | char *end_of_smb; | |
4976 | int rc; | |
4977 | ||
4978 | rsp = (struct smb2_query_directory_rsp *)rsp_iov->iov_base; | |
4979 | ||
4980 | switch (srch_inf->info_level) { | |
4981 | case SMB_FIND_FILE_DIRECTORY_INFO: | |
35235e19 | 4982 | info_buf_size = sizeof(FILE_DIRECTORY_INFO); |
af08f9e7 RS |
4983 | break; |
4984 | case SMB_FIND_FILE_ID_FULL_DIR_INFO: | |
35235e19 | 4985 | info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO); |
af08f9e7 | 4986 | break; |
3d519bd1 AA |
4987 | case SMB_FIND_FILE_POSIX_INFO: |
4988 | /* note that posix payload are variable size */ | |
4989 | info_buf_size = sizeof(struct smb2_posix_info); | |
4990 | break; | |
af08f9e7 RS |
4991 | default: |
4992 | cifs_tcon_dbg(VFS, "info level %u isn't supported\n", | |
4993 | srch_inf->info_level); | |
4994 | return -EINVAL; | |
4995 | } | |
4996 | ||
4997 | rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset), | |
4998 | le32_to_cpu(rsp->OutputBufferLength), rsp_iov, | |
4999 | info_buf_size); | |
3d519bd1 AA |
5000 | if (rc) { |
5001 | cifs_tcon_dbg(VFS, "bad info payload"); | |
af08f9e7 | 5002 | return rc; |
3d519bd1 | 5003 | } |
af08f9e7 RS |
5004 | |
5005 | srch_inf->unicode = true; | |
5006 | ||
5007 | if (srch_inf->ntwrk_buf_start) { | |
5008 | if (srch_inf->smallBuf) | |
5009 | cifs_small_buf_release(srch_inf->ntwrk_buf_start); | |
5010 | else | |
5011 | cifs_buf_release(srch_inf->ntwrk_buf_start); | |
5012 | } | |
5013 | srch_inf->ntwrk_buf_start = (char *)rsp; | |
5014 | srch_inf->srch_entries_start = srch_inf->last_entry = | |
5015 | (char *)rsp + le16_to_cpu(rsp->OutputBufferOffset); | |
5016 | end_of_smb = rsp_iov->iov_len + (char *)rsp; | |
3d519bd1 AA |
5017 | |
5018 | srch_inf->entries_in_buffer = num_entries( | |
5019 | srch_inf->info_level, | |
5020 | srch_inf->srch_entries_start, | |
5021 | end_of_smb, | |
5022 | &srch_inf->last_entry, | |
5023 | info_buf_size); | |
5024 | ||
af08f9e7 RS |
5025 | srch_inf->index_of_last_entry += srch_inf->entries_in_buffer; |
5026 | cifs_dbg(FYI, "num entries %d last_index %lld srch start %p srch end %p\n", | |
5027 | srch_inf->entries_in_buffer, srch_inf->index_of_last_entry, | |
5028 | srch_inf->srch_entries_start, srch_inf->last_entry); | |
5029 | if (resp_buftype == CIFS_LARGE_BUFFER) | |
5030 | srch_inf->smallBuf = false; | |
5031 | else if (resp_buftype == CIFS_SMALL_BUFFER) | |
5032 | srch_inf->smallBuf = true; | |
5033 | else | |
a0a3036b | 5034 | cifs_tcon_dbg(VFS, "Invalid search buffer type\n"); |
af08f9e7 RS |
5035 | |
5036 | return 0; | |
5037 | } | |
5038 | ||
0a17799c RS |
5039 | int |
5040 | SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon, | |
5041 | u64 persistent_fid, u64 volatile_fid, int index, | |
5042 | struct cifs_search_info *srch_inf) | |
5043 | { | |
5044 | struct smb_rqst rqst; | |
5045 | struct kvec iov[SMB2_QUERY_DIRECTORY_IOV_SIZE]; | |
5046 | struct smb2_query_directory_rsp *rsp = NULL; | |
5047 | int resp_buftype = CIFS_NO_BUFFER; | |
5048 | struct kvec rsp_iov; | |
5049 | int rc = 0; | |
0a17799c | 5050 | struct cifs_ses *ses = tcon->ses; |
352d96f3 | 5051 | struct TCP_Server_Info *server = cifs_pick_channel(ses); |
0a17799c RS |
5052 | int flags = 0; |
5053 | ||
c4985c3d | 5054 | if (!ses || !(ses->server)) |
0a17799c RS |
5055 | return -EIO; |
5056 | ||
5057 | if (smb3_encryption_required(tcon)) | |
5058 | flags |= CIFS_TRANSFORM_REQ; | |
5059 | ||
40eff45b | 5060 | memset(&rqst, 0, sizeof(struct smb_rqst)); |
0a17799c | 5061 | memset(&iov, 0, sizeof(iov)); |
40eff45b | 5062 | rqst.rq_iov = iov; |
0a17799c | 5063 | rqst.rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE; |
40eff45b | 5064 | |
352d96f3 AA |
5065 | rc = SMB2_query_directory_init(xid, tcon, server, |
5066 | &rqst, persistent_fid, | |
0a17799c RS |
5067 | volatile_fid, index, |
5068 | srch_inf->info_level); | |
5069 | if (rc) | |
5070 | goto qdir_exit; | |
d323c246 | 5071 | |
352d96f3 AA |
5072 | rc = cifs_send_recv(xid, ses, server, |
5073 | &rqst, &resp_buftype, flags, &rsp_iov); | |
da502f7d | 5074 | rsp = (struct smb2_query_directory_rsp *)rsp_iov.iov_base; |
e5d04887 | 5075 | |
d324f08d | 5076 | if (rc) { |
31473fc4 | 5077 | if (rc == -ENODATA && |
0d35e382 | 5078 | rsp->hdr.Status == STATUS_NO_MORE_FILES) { |
adb3b4e9 SF |
5079 | trace_smb3_query_dir_done(xid, persistent_fid, |
5080 | tcon->tid, tcon->ses->Suid, index, 0); | |
52755808 PS |
5081 | srch_inf->endOfSearch = true; |
5082 | rc = 0; | |
adb3b4e9 SF |
5083 | } else { |
5084 | trace_smb3_query_dir_err(xid, persistent_fid, tcon->tid, | |
5085 | tcon->ses->Suid, index, 0, rc); | |
8e6e72ae | 5086 | cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE); |
adb3b4e9 | 5087 | } |
d324f08d PS |
5088 | goto qdir_exit; |
5089 | } | |
d324f08d | 5090 | |
af08f9e7 RS |
5091 | rc = smb2_parse_query_directory(tcon, &rsp_iov, resp_buftype, |
5092 | srch_inf); | |
adb3b4e9 SF |
5093 | if (rc) { |
5094 | trace_smb3_query_dir_err(xid, persistent_fid, tcon->tid, | |
5095 | tcon->ses->Suid, index, 0, rc); | |
d324f08d | 5096 | goto qdir_exit; |
adb3b4e9 | 5097 | } |
0a17799c RS |
5098 | resp_buftype = CIFS_NO_BUFFER; |
5099 | ||
adb3b4e9 SF |
5100 | trace_smb3_query_dir_done(xid, persistent_fid, tcon->tid, |
5101 | tcon->ses->Suid, index, srch_inf->entries_in_buffer); | |
d324f08d PS |
5102 | |
5103 | qdir_exit: | |
0a17799c | 5104 | SMB2_query_directory_free(&rqst); |
d324f08d PS |
5105 | free_rsp_buf(resp_buftype, rsp); |
5106 | return rc; | |
5107 | } | |
5108 | ||
ba8ca116 | 5109 | int |
352d96f3 AA |
5110 | SMB2_set_info_init(struct cifs_tcon *tcon, struct TCP_Server_Info *server, |
5111 | struct smb_rqst *rqst, | |
5112 | u64 persistent_fid, u64 volatile_fid, u32 pid, | |
5113 | u8 info_class, u8 info_type, u32 additional_info, | |
5114 | void **data, unsigned int *size) | |
35143eb5 PS |
5115 | { |
5116 | struct smb2_set_info_req *req; | |
ba8ca116 RS |
5117 | struct kvec *iov = rqst->rq_iov; |
5118 | unsigned int i, total_len; | |
5119 | int rc; | |
35143eb5 | 5120 | |
352d96f3 AA |
5121 | rc = smb2_plain_req_init(SMB2_SET_INFO, tcon, server, |
5122 | (void **) &req, &total_len); | |
ba8ca116 | 5123 | if (rc) |
35143eb5 | 5124 | return rc; |
7fb8986e | 5125 | |
0d35e382 | 5126 | req->hdr.Id.SyncId.ProcessId = cpu_to_le32(pid); |
dac95340 | 5127 | req->InfoType = info_type; |
35143eb5 PS |
5128 | req->FileInfoClass = info_class; |
5129 | req->PersistentFileId = persistent_fid; | |
5130 | req->VolatileFileId = volatile_fid; | |
dac95340 | 5131 | req->AdditionalInformation = cpu_to_le32(additional_info); |
35143eb5 | 5132 | |
eb3e28c1 | 5133 | req->BufferOffset = cpu_to_le16(sizeof(struct smb2_set_info_req)); |
35143eb5 PS |
5134 | req->BufferLength = cpu_to_le32(*size); |
5135 | ||
35143eb5 | 5136 | memcpy(req->Buffer, *data, *size); |
2fc803ef | 5137 | total_len += *size; |
35143eb5 PS |
5138 | |
5139 | iov[0].iov_base = (char *)req; | |
2fc803ef RS |
5140 | /* 1 for Buffer */ |
5141 | iov[0].iov_len = total_len - 1; | |
35143eb5 | 5142 | |
ba8ca116 | 5143 | for (i = 1; i < rqst->rq_nvec; i++) { |
35143eb5 PS |
5144 | le32_add_cpu(&req->BufferLength, size[i]); |
5145 | iov[i].iov_base = (char *)data[i]; | |
5146 | iov[i].iov_len = size[i]; | |
5147 | } | |
5148 | ||
ba8ca116 RS |
5149 | return 0; |
5150 | } | |
5151 | ||
5152 | void | |
5153 | SMB2_set_info_free(struct smb_rqst *rqst) | |
5154 | { | |
32a1fb36 RS |
5155 | if (rqst && rqst->rq_iov) |
5156 | cifs_buf_release(rqst->rq_iov[0].iov_base); /* request */ | |
ba8ca116 RS |
5157 | } |
5158 | ||
5159 | static int | |
5160 | send_set_info(const unsigned int xid, struct cifs_tcon *tcon, | |
5161 | u64 persistent_fid, u64 volatile_fid, u32 pid, u8 info_class, | |
5162 | u8 info_type, u32 additional_info, unsigned int num, | |
5163 | void **data, unsigned int *size) | |
5164 | { | |
5165 | struct smb_rqst rqst; | |
5166 | struct smb2_set_info_rsp *rsp = NULL; | |
5167 | struct kvec *iov; | |
5168 | struct kvec rsp_iov; | |
5169 | int rc = 0; | |
5170 | int resp_buftype; | |
5171 | struct cifs_ses *ses = tcon->ses; | |
352d96f3 | 5172 | struct TCP_Server_Info *server = cifs_pick_channel(ses); |
ba8ca116 RS |
5173 | int flags = 0; |
5174 | ||
352d96f3 | 5175 | if (!ses || !server) |
ba8ca116 RS |
5176 | return -EIO; |
5177 | ||
5178 | if (!num) | |
5179 | return -EINVAL; | |
5180 | ||
5181 | if (smb3_encryption_required(tcon)) | |
5182 | flags |= CIFS_TRANSFORM_REQ; | |
5183 | ||
5184 | iov = kmalloc_array(num, sizeof(struct kvec), GFP_KERNEL); | |
5185 | if (!iov) | |
5186 | return -ENOMEM; | |
5187 | ||
40eff45b RS |
5188 | memset(&rqst, 0, sizeof(struct smb_rqst)); |
5189 | rqst.rq_iov = iov; | |
5190 | rqst.rq_nvec = num; | |
5191 | ||
352d96f3 AA |
5192 | rc = SMB2_set_info_init(tcon, server, |
5193 | &rqst, persistent_fid, volatile_fid, pid, | |
ba8ca116 RS |
5194 | info_class, info_type, additional_info, |
5195 | data, size); | |
5196 | if (rc) { | |
5197 | kfree(iov); | |
5198 | return rc; | |
5199 | } | |
5200 | ||
5201 | ||
352d96f3 AA |
5202 | rc = cifs_send_recv(xid, ses, server, |
5203 | &rqst, &resp_buftype, flags, | |
2fc803ef | 5204 | &rsp_iov); |
ba8ca116 | 5205 | SMB2_set_info_free(&rqst); |
da502f7d | 5206 | rsp = (struct smb2_set_info_rsp *)rsp_iov.iov_base; |
35143eb5 | 5207 | |
eccb4422 | 5208 | if (rc != 0) { |
35143eb5 | 5209 | cifs_stats_fail_inc(tcon, SMB2_SET_INFO_HE); |
eccb4422 SF |
5210 | trace_smb3_set_info_err(xid, persistent_fid, tcon->tid, |
5211 | ses->Suid, info_class, (__u32)info_type, rc); | |
5212 | } | |
7d3fb24b | 5213 | |
35143eb5 PS |
5214 | free_rsp_buf(resp_buftype, rsp); |
5215 | kfree(iov); | |
5216 | return rc; | |
5217 | } | |
5218 | ||
c839ff24 PS |
5219 | int |
5220 | SMB2_set_eof(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, | |
3764cbd1 | 5221 | u64 volatile_fid, u32 pid, __le64 *eof) |
c839ff24 PS |
5222 | { |
5223 | struct smb2_file_eof_info info; | |
5224 | void *data; | |
5225 | unsigned int size; | |
5226 | ||
5227 | info.EndOfFile = *eof; | |
5228 | ||
5229 | data = &info; | |
5230 | size = sizeof(struct smb2_file_eof_info); | |
5231 | ||
7c05eae8 SF |
5232 | trace_smb3_set_eof(xid, persistent_fid, tcon->tid, tcon->ses->Suid, le64_to_cpu(*eof)); |
5233 | ||
3764cbd1 | 5234 | return send_set_info(xid, tcon, persistent_fid, volatile_fid, |
dac95340 SP |
5235 | pid, FILE_END_OF_FILE_INFORMATION, SMB2_O_INFO_FILE, |
5236 | 0, 1, &data, &size); | |
c839ff24 | 5237 | } |
1feeaac7 | 5238 | |
dac95340 SP |
5239 | int |
5240 | SMB2_set_acl(const unsigned int xid, struct cifs_tcon *tcon, | |
5241 | u64 persistent_fid, u64 volatile_fid, | |
5242 | struct cifs_ntsd *pnntsd, int pacllen, int aclflag) | |
5243 | { | |
5244 | return send_set_info(xid, tcon, persistent_fid, volatile_fid, | |
5245 | current->tgid, 0, SMB2_O_INFO_SECURITY, aclflag, | |
5246 | 1, (void **)&pnntsd, &pacllen); | |
1feeaac7 | 5247 | } |
983c88a4 | 5248 | |
5517554e RS |
5249 | int |
5250 | SMB2_set_ea(const unsigned int xid, struct cifs_tcon *tcon, | |
5251 | u64 persistent_fid, u64 volatile_fid, | |
5252 | struct smb2_file_full_ea_info *buf, int len) | |
5253 | { | |
5254 | return send_set_info(xid, tcon, persistent_fid, volatile_fid, | |
5255 | current->tgid, FILE_FULL_EA_INFORMATION, SMB2_O_INFO_FILE, | |
5256 | 0, 1, (void **)&buf, &len); | |
5257 | } | |
5258 | ||
983c88a4 PS |
5259 | int |
5260 | SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon, | |
5261 | const u64 persistent_fid, const u64 volatile_fid, | |
5262 | __u8 oplock_level) | |
5263 | { | |
40eff45b | 5264 | struct smb_rqst rqst; |
983c88a4 | 5265 | int rc; |
0d5a288d | 5266 | struct smb2_oplock_break *req = NULL; |
21ad9487 | 5267 | struct cifs_ses *ses = tcon->ses; |
352d96f3 | 5268 | struct TCP_Server_Info *server = cifs_pick_channel(ses); |
7fb8986e | 5269 | int flags = CIFS_OBREAK_OP; |
21ad9487 RS |
5270 | unsigned int total_len; |
5271 | struct kvec iov[1]; | |
5272 | struct kvec rsp_iov; | |
5273 | int resp_buf_type; | |
983c88a4 | 5274 | |
f96637be | 5275 | cifs_dbg(FYI, "SMB2_oplock_break\n"); |
352d96f3 AA |
5276 | rc = smb2_plain_req_init(SMB2_OPLOCK_BREAK, tcon, server, |
5277 | (void **) &req, &total_len); | |
983c88a4 PS |
5278 | if (rc) |
5279 | return rc; | |
5280 | ||
5a77e75f | 5281 | if (smb3_encryption_required(tcon)) |
7fb8986e PS |
5282 | flags |= CIFS_TRANSFORM_REQ; |
5283 | ||
983c88a4 PS |
5284 | req->VolatileFid = volatile_fid; |
5285 | req->PersistentFid = persistent_fid; | |
5286 | req->OplockLevel = oplock_level; | |
0d35e382 | 5287 | req->hdr.CreditRequest = cpu_to_le16(1); |
983c88a4 | 5288 | |
392e1c5d | 5289 | flags |= CIFS_NO_RSP_BUF; |
21ad9487 RS |
5290 | |
5291 | iov[0].iov_base = (char *)req; | |
5292 | iov[0].iov_len = total_len; | |
5293 | ||
40eff45b RS |
5294 | memset(&rqst, 0, sizeof(struct smb_rqst)); |
5295 | rqst.rq_iov = iov; | |
5296 | rqst.rq_nvec = 1; | |
5297 | ||
352d96f3 AA |
5298 | rc = cifs_send_recv(xid, ses, server, |
5299 | &rqst, &resp_buf_type, flags, &rsp_iov); | |
da502f7d | 5300 | cifs_small_buf_release(req); |
983c88a4 PS |
5301 | |
5302 | if (rc) { | |
5303 | cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE); | |
f96637be | 5304 | cifs_dbg(FYI, "Send error in Oplock Break = %d\n", rc); |
983c88a4 PS |
5305 | } |
5306 | ||
5307 | return rc; | |
5308 | } | |
6fc05c25 | 5309 | |
730928c8 RS |
5310 | void |
5311 | smb2_copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info *pfs_inf, | |
5312 | struct kstatfs *kst) | |
6fc05c25 PS |
5313 | { |
5314 | kst->f_bsize = le32_to_cpu(pfs_inf->BytesPerSector) * | |
5315 | le32_to_cpu(pfs_inf->SectorsPerAllocationUnit); | |
5316 | kst->f_blocks = le64_to_cpu(pfs_inf->TotalAllocationUnits); | |
42bec214 SP |
5317 | kst->f_bfree = kst->f_bavail = |
5318 | le64_to_cpu(pfs_inf->CallerAvailableAllocationUnits); | |
6fc05c25 PS |
5319 | return; |
5320 | } | |
5321 | ||
2d304217 SF |
5322 | static void |
5323 | copy_posix_fs_info_to_kstatfs(FILE_SYSTEM_POSIX_INFO *response_data, | |
5324 | struct kstatfs *kst) | |
5325 | { | |
5326 | kst->f_bsize = le32_to_cpu(response_data->BlockSize); | |
5327 | kst->f_blocks = le64_to_cpu(response_data->TotalBlocks); | |
5328 | kst->f_bfree = le64_to_cpu(response_data->BlocksAvail); | |
5329 | if (response_data->UserBlocksAvail == cpu_to_le64(-1)) | |
5330 | kst->f_bavail = kst->f_bfree; | |
5331 | else | |
5332 | kst->f_bavail = le64_to_cpu(response_data->UserBlocksAvail); | |
5333 | if (response_data->TotalFileNodes != cpu_to_le64(-1)) | |
5334 | kst->f_files = le64_to_cpu(response_data->TotalFileNodes); | |
5335 | if (response_data->FreeFileNodes != cpu_to_le64(-1)) | |
5336 | kst->f_ffree = le64_to_cpu(response_data->FreeFileNodes); | |
5337 | ||
5338 | return; | |
5339 | } | |
2d304217 | 5340 | |
6fc05c25 | 5341 | static int |
352d96f3 AA |
5342 | build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon, |
5343 | struct TCP_Server_Info *server, | |
5344 | int level, int outbuf_len, u64 persistent_fid, | |
5345 | u64 volatile_fid) | |
6fc05c25 PS |
5346 | { |
5347 | int rc; | |
5348 | struct smb2_query_info_req *req; | |
b2fb7fec | 5349 | unsigned int total_len; |
6fc05c25 | 5350 | |
f96637be | 5351 | cifs_dbg(FYI, "Query FSInfo level %d\n", level); |
6fc05c25 | 5352 | |
352d96f3 | 5353 | if ((tcon->ses == NULL) || server == NULL) |
6fc05c25 PS |
5354 | return -EIO; |
5355 | ||
352d96f3 AA |
5356 | rc = smb2_plain_req_init(SMB2_QUERY_INFO, tcon, server, |
5357 | (void **) &req, &total_len); | |
6fc05c25 PS |
5358 | if (rc) |
5359 | return rc; | |
5360 | ||
5361 | req->InfoType = SMB2_O_INFO_FILESYSTEM; | |
5362 | req->FileInfoClass = level; | |
5363 | req->PersistentFileId = persistent_fid; | |
5364 | req->VolatileFileId = volatile_fid; | |
b2fb7fec | 5365 | /* 1 for pad */ |
6fc05c25 | 5366 | req->InputBufferOffset = |
eb3e28c1 | 5367 | cpu_to_le16(sizeof(struct smb2_query_info_req)); |
6fc05c25 | 5368 | req->OutputBufferLength = cpu_to_le32( |
eb3e28c1 | 5369 | outbuf_len + sizeof(struct smb2_query_info_rsp)); |
6fc05c25 PS |
5370 | |
5371 | iov->iov_base = (char *)req; | |
b2fb7fec | 5372 | iov->iov_len = total_len; |
6fc05c25 PS |
5373 | return 0; |
5374 | } | |
5375 | ||
2d304217 SF |
5376 | int |
5377 | SMB311_posix_qfs_info(const unsigned int xid, struct cifs_tcon *tcon, | |
5378 | u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata) | |
5379 | { | |
5380 | struct smb_rqst rqst; | |
5381 | struct smb2_query_info_rsp *rsp = NULL; | |
5382 | struct kvec iov; | |
5383 | struct kvec rsp_iov; | |
5384 | int rc = 0; | |
5385 | int resp_buftype; | |
5386 | struct cifs_ses *ses = tcon->ses; | |
352d96f3 | 5387 | struct TCP_Server_Info *server = cifs_pick_channel(ses); |
2d304217 SF |
5388 | FILE_SYSTEM_POSIX_INFO *info = NULL; |
5389 | int flags = 0; | |
5390 | ||
352d96f3 AA |
5391 | rc = build_qfs_info_req(&iov, tcon, server, |
5392 | FS_POSIX_INFORMATION, | |
2d304217 SF |
5393 | sizeof(FILE_SYSTEM_POSIX_INFO), |
5394 | persistent_fid, volatile_fid); | |
5395 | if (rc) | |
5396 | return rc; | |
5397 | ||
5398 | if (smb3_encryption_required(tcon)) | |
5399 | flags |= CIFS_TRANSFORM_REQ; | |
5400 | ||
5401 | memset(&rqst, 0, sizeof(struct smb_rqst)); | |
5402 | rqst.rq_iov = &iov; | |
5403 | rqst.rq_nvec = 1; | |
5404 | ||
352d96f3 AA |
5405 | rc = cifs_send_recv(xid, ses, server, |
5406 | &rqst, &resp_buftype, flags, &rsp_iov); | |
2d304217 SF |
5407 | cifs_small_buf_release(iov.iov_base); |
5408 | if (rc) { | |
5409 | cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE); | |
5410 | goto posix_qfsinf_exit; | |
5411 | } | |
5412 | rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; | |
5413 | ||
5414 | info = (FILE_SYSTEM_POSIX_INFO *)( | |
5415 | le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp); | |
730928c8 RS |
5416 | rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset), |
5417 | le32_to_cpu(rsp->OutputBufferLength), &rsp_iov, | |
5418 | sizeof(FILE_SYSTEM_POSIX_INFO)); | |
2d304217 SF |
5419 | if (!rc) |
5420 | copy_posix_fs_info_to_kstatfs(info, fsdata); | |
5421 | ||
5422 | posix_qfsinf_exit: | |
5423 | free_rsp_buf(resp_buftype, rsp_iov.iov_base); | |
5424 | return rc; | |
5425 | } | |
2d304217 | 5426 | |
6fc05c25 PS |
5427 | int |
5428 | SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon, | |
5429 | u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata) | |
5430 | { | |
40eff45b | 5431 | struct smb_rqst rqst; |
6fc05c25 PS |
5432 | struct smb2_query_info_rsp *rsp = NULL; |
5433 | struct kvec iov; | |
da502f7d | 5434 | struct kvec rsp_iov; |
6fc05c25 PS |
5435 | int rc = 0; |
5436 | int resp_buftype; | |
5437 | struct cifs_ses *ses = tcon->ses; | |
352d96f3 | 5438 | struct TCP_Server_Info *server = cifs_pick_channel(ses); |
6fc05c25 | 5439 | struct smb2_fs_full_size_info *info = NULL; |
7fb8986e | 5440 | int flags = 0; |
6fc05c25 | 5441 | |
352d96f3 AA |
5442 | rc = build_qfs_info_req(&iov, tcon, server, |
5443 | FS_FULL_SIZE_INFORMATION, | |
6fc05c25 PS |
5444 | sizeof(struct smb2_fs_full_size_info), |
5445 | persistent_fid, volatile_fid); | |
5446 | if (rc) | |
5447 | return rc; | |
5448 | ||
5a77e75f | 5449 | if (smb3_encryption_required(tcon)) |
7fb8986e PS |
5450 | flags |= CIFS_TRANSFORM_REQ; |
5451 | ||
40eff45b RS |
5452 | memset(&rqst, 0, sizeof(struct smb_rqst)); |
5453 | rqst.rq_iov = &iov; | |
5454 | rqst.rq_nvec = 1; | |
5455 | ||
352d96f3 AA |
5456 | rc = cifs_send_recv(xid, ses, server, |
5457 | &rqst, &resp_buftype, flags, &rsp_iov); | |
da502f7d | 5458 | cifs_small_buf_release(iov.iov_base); |
6fc05c25 PS |
5459 | if (rc) { |
5460 | cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE); | |
34f62640 | 5461 | goto qfsinf_exit; |
6fc05c25 | 5462 | } |
da502f7d | 5463 | rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; |
6fc05c25 | 5464 | |
1fc6ad2f | 5465 | info = (struct smb2_fs_full_size_info *)( |
49f466bd | 5466 | le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp); |
730928c8 RS |
5467 | rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset), |
5468 | le32_to_cpu(rsp->OutputBufferLength), &rsp_iov, | |
5469 | sizeof(struct smb2_fs_full_size_info)); | |
6fc05c25 | 5470 | if (!rc) |
730928c8 | 5471 | smb2_copy_fs_info_to_kstatfs(info, fsdata); |
6fc05c25 | 5472 | |
34f62640 | 5473 | qfsinf_exit: |
da502f7d | 5474 | free_rsp_buf(resp_buftype, rsp_iov.iov_base); |
34f62640 SF |
5475 | return rc; |
5476 | } | |
5477 | ||
5478 | int | |
5479 | SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon, | |
2167114c | 5480 | u64 persistent_fid, u64 volatile_fid, int level) |
34f62640 | 5481 | { |
40eff45b | 5482 | struct smb_rqst rqst; |
34f62640 SF |
5483 | struct smb2_query_info_rsp *rsp = NULL; |
5484 | struct kvec iov; | |
da502f7d | 5485 | struct kvec rsp_iov; |
34f62640 | 5486 | int rc = 0; |
2167114c | 5487 | int resp_buftype, max_len, min_len; |
34f62640 | 5488 | struct cifs_ses *ses = tcon->ses; |
352d96f3 | 5489 | struct TCP_Server_Info *server = cifs_pick_channel(ses); |
34f62640 | 5490 | unsigned int rsp_len, offset; |
7fb8986e | 5491 | int flags = 0; |
34f62640 | 5492 | |
2167114c SF |
5493 | if (level == FS_DEVICE_INFORMATION) { |
5494 | max_len = sizeof(FILE_SYSTEM_DEVICE_INFO); | |
5495 | min_len = sizeof(FILE_SYSTEM_DEVICE_INFO); | |
5496 | } else if (level == FS_ATTRIBUTE_INFORMATION) { | |
5497 | max_len = sizeof(FILE_SYSTEM_ATTRIBUTE_INFO); | |
5498 | min_len = MIN_FS_ATTR_INFO_SIZE; | |
af6a12ea SF |
5499 | } else if (level == FS_SECTOR_SIZE_INFORMATION) { |
5500 | max_len = sizeof(struct smb3_fs_ss_info); | |
5501 | min_len = sizeof(struct smb3_fs_ss_info); | |
21ba3845 SF |
5502 | } else if (level == FS_VOLUME_INFORMATION) { |
5503 | max_len = sizeof(struct smb3_fs_vol_info) + MAX_VOL_LABEL_LEN; | |
5504 | min_len = sizeof(struct smb3_fs_vol_info); | |
2167114c | 5505 | } else { |
af6a12ea | 5506 | cifs_dbg(FYI, "Invalid qfsinfo level %d\n", level); |
2167114c SF |
5507 | return -EINVAL; |
5508 | } | |
5509 | ||
352d96f3 AA |
5510 | rc = build_qfs_info_req(&iov, tcon, server, |
5511 | level, max_len, | |
34f62640 SF |
5512 | persistent_fid, volatile_fid); |
5513 | if (rc) | |
5514 | return rc; | |
5515 | ||
5a77e75f | 5516 | if (smb3_encryption_required(tcon)) |
7fb8986e PS |
5517 | flags |= CIFS_TRANSFORM_REQ; |
5518 | ||
40eff45b RS |
5519 | memset(&rqst, 0, sizeof(struct smb_rqst)); |
5520 | rqst.rq_iov = &iov; | |
5521 | rqst.rq_nvec = 1; | |
5522 | ||
352d96f3 AA |
5523 | rc = cifs_send_recv(xid, ses, server, |
5524 | &rqst, &resp_buftype, flags, &rsp_iov); | |
da502f7d | 5525 | cifs_small_buf_release(iov.iov_base); |
34f62640 SF |
5526 | if (rc) { |
5527 | cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE); | |
5528 | goto qfsattr_exit; | |
5529 | } | |
da502f7d | 5530 | rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; |
34f62640 SF |
5531 | |
5532 | rsp_len = le32_to_cpu(rsp->OutputBufferLength); | |
5533 | offset = le16_to_cpu(rsp->OutputBufferOffset); | |
730928c8 | 5534 | rc = smb2_validate_iov(offset, rsp_len, &rsp_iov, min_len); |
2167114c SF |
5535 | if (rc) |
5536 | goto qfsattr_exit; | |
5537 | ||
5538 | if (level == FS_ATTRIBUTE_INFORMATION) | |
1fc6ad2f | 5539 | memcpy(&tcon->fsAttrInfo, offset |
49f466bd | 5540 | + (char *)rsp, min_t(unsigned int, |
2167114c SF |
5541 | rsp_len, max_len)); |
5542 | else if (level == FS_DEVICE_INFORMATION) | |
1fc6ad2f | 5543 | memcpy(&tcon->fsDevInfo, offset |
49f466bd | 5544 | + (char *)rsp, sizeof(FILE_SYSTEM_DEVICE_INFO)); |
af6a12ea SF |
5545 | else if (level == FS_SECTOR_SIZE_INFORMATION) { |
5546 | struct smb3_fs_ss_info *ss_info = (struct smb3_fs_ss_info *) | |
1fc6ad2f | 5547 | (offset + (char *)rsp); |
af6a12ea SF |
5548 | tcon->ss_flags = le32_to_cpu(ss_info->Flags); |
5549 | tcon->perf_sector_size = | |
5550 | le32_to_cpu(ss_info->PhysicalBytesPerSectorForPerf); | |
21ba3845 SF |
5551 | } else if (level == FS_VOLUME_INFORMATION) { |
5552 | struct smb3_fs_vol_info *vol_info = (struct smb3_fs_vol_info *) | |
5553 | (offset + (char *)rsp); | |
5554 | tcon->vol_serial_number = vol_info->VolumeSerialNumber; | |
5555 | tcon->vol_create_time = vol_info->VolumeCreationTime; | |
af6a12ea | 5556 | } |
34f62640 SF |
5557 | |
5558 | qfsattr_exit: | |
da502f7d | 5559 | free_rsp_buf(resp_buftype, rsp_iov.iov_base); |
6fc05c25 PS |
5560 | return rc; |
5561 | } | |
f7ba7fe6 PS |
5562 | |
5563 | int | |
5564 | smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon, | |
5565 | const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid, | |
5566 | const __u32 num_lock, struct smb2_lock_element *buf) | |
5567 | { | |
40eff45b | 5568 | struct smb_rqst rqst; |
f7ba7fe6 PS |
5569 | int rc = 0; |
5570 | struct smb2_lock_req *req = NULL; | |
5571 | struct kvec iov[2]; | |
da502f7d | 5572 | struct kvec rsp_iov; |
f7ba7fe6 PS |
5573 | int resp_buf_type; |
5574 | unsigned int count; | |
392e1c5d | 5575 | int flags = CIFS_NO_RSP_BUF; |
ced93679 | 5576 | unsigned int total_len; |
352d96f3 | 5577 | struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses); |
f7ba7fe6 | 5578 | |
f96637be | 5579 | cifs_dbg(FYI, "smb2_lockv num lock %d\n", num_lock); |
f7ba7fe6 | 5580 | |
352d96f3 AA |
5581 | rc = smb2_plain_req_init(SMB2_LOCK, tcon, server, |
5582 | (void **) &req, &total_len); | |
f7ba7fe6 PS |
5583 | if (rc) |
5584 | return rc; | |
5585 | ||
5a77e75f | 5586 | if (smb3_encryption_required(tcon)) |
7fb8986e PS |
5587 | flags |= CIFS_TRANSFORM_REQ; |
5588 | ||
0d35e382 | 5589 | req->hdr.Id.SyncId.ProcessId = cpu_to_le32(pid); |
f7ba7fe6 PS |
5590 | req->LockCount = cpu_to_le16(num_lock); |
5591 | ||
5592 | req->PersistentFileId = persist_fid; | |
5593 | req->VolatileFileId = volatile_fid; | |
5594 | ||
5595 | count = num_lock * sizeof(struct smb2_lock_element); | |
f7ba7fe6 PS |
5596 | |
5597 | iov[0].iov_base = (char *)req; | |
ced93679 | 5598 | iov[0].iov_len = total_len - sizeof(struct smb2_lock_element); |
f7ba7fe6 PS |
5599 | iov[1].iov_base = (char *)buf; |
5600 | iov[1].iov_len = count; | |
5601 | ||
5602 | cifs_stats_inc(&tcon->stats.cifs_stats.num_locks); | |
40eff45b RS |
5603 | |
5604 | memset(&rqst, 0, sizeof(struct smb_rqst)); | |
5605 | rqst.rq_iov = iov; | |
5606 | rqst.rq_nvec = 2; | |
5607 | ||
352d96f3 AA |
5608 | rc = cifs_send_recv(xid, tcon->ses, server, |
5609 | &rqst, &resp_buf_type, flags, | |
ced93679 | 5610 | &rsp_iov); |
da502f7d | 5611 | cifs_small_buf_release(req); |
f7ba7fe6 | 5612 | if (rc) { |
f96637be | 5613 | cifs_dbg(FYI, "Send error in smb2_lockv = %d\n", rc); |
f7ba7fe6 | 5614 | cifs_stats_fail_inc(tcon, SMB2_LOCK_HE); |
eccb4422 SF |
5615 | trace_smb3_lock_err(xid, persist_fid, tcon->tid, |
5616 | tcon->ses->Suid, rc); | |
f7ba7fe6 PS |
5617 | } |
5618 | ||
5619 | return rc; | |
5620 | } | |
5621 | ||
5622 | int | |
5623 | SMB2_lock(const unsigned int xid, struct cifs_tcon *tcon, | |
5624 | const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid, | |
5625 | const __u64 length, const __u64 offset, const __u32 lock_flags, | |
5626 | const bool wait) | |
5627 | { | |
5628 | struct smb2_lock_element lock; | |
5629 | ||
5630 | lock.Offset = cpu_to_le64(offset); | |
5631 | lock.Length = cpu_to_le64(length); | |
5632 | lock.Flags = cpu_to_le32(lock_flags); | |
5633 | if (!wait && lock_flags != SMB2_LOCKFLAG_UNLOCK) | |
5634 | lock.Flags |= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY); | |
5635 | ||
5636 | return smb2_lockv(xid, tcon, persist_fid, volatile_fid, pid, 1, &lock); | |
5637 | } | |
0822f514 PS |
5638 | |
5639 | int | |
5640 | SMB2_lease_break(const unsigned int xid, struct cifs_tcon *tcon, | |
5641 | __u8 *lease_key, const __le32 lease_state) | |
5642 | { | |
40eff45b | 5643 | struct smb_rqst rqst; |
0822f514 PS |
5644 | int rc; |
5645 | struct smb2_lease_ack *req = NULL; | |
8eb7998e | 5646 | struct cifs_ses *ses = tcon->ses; |
7fb8986e | 5647 | int flags = CIFS_OBREAK_OP; |
8eb7998e RS |
5648 | unsigned int total_len; |
5649 | struct kvec iov[1]; | |
5650 | struct kvec rsp_iov; | |
5651 | int resp_buf_type; | |
179e44d4 SF |
5652 | __u64 *please_key_high; |
5653 | __u64 *please_key_low; | |
352d96f3 | 5654 | struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses); |
0822f514 | 5655 | |
f96637be | 5656 | cifs_dbg(FYI, "SMB2_lease_break\n"); |
352d96f3 AA |
5657 | rc = smb2_plain_req_init(SMB2_OPLOCK_BREAK, tcon, server, |
5658 | (void **) &req, &total_len); | |
0822f514 PS |
5659 | if (rc) |
5660 | return rc; | |
5661 | ||
5a77e75f | 5662 | if (smb3_encryption_required(tcon)) |
7fb8986e PS |
5663 | flags |= CIFS_TRANSFORM_REQ; |
5664 | ||
0d35e382 | 5665 | req->hdr.CreditRequest = cpu_to_le16(1); |
0822f514 | 5666 | req->StructureSize = cpu_to_le16(36); |
8eb7998e | 5667 | total_len += 12; |
0822f514 PS |
5668 | |
5669 | memcpy(req->LeaseKey, lease_key, 16); | |
5670 | req->LeaseState = lease_state; | |
5671 | ||
392e1c5d | 5672 | flags |= CIFS_NO_RSP_BUF; |
8eb7998e RS |
5673 | |
5674 | iov[0].iov_base = (char *)req; | |
5675 | iov[0].iov_len = total_len; | |
5676 | ||
40eff45b RS |
5677 | memset(&rqst, 0, sizeof(struct smb_rqst)); |
5678 | rqst.rq_iov = iov; | |
5679 | rqst.rq_nvec = 1; | |
5680 | ||
352d96f3 AA |
5681 | rc = cifs_send_recv(xid, ses, server, |
5682 | &rqst, &resp_buf_type, flags, &rsp_iov); | |
da502f7d | 5683 | cifs_small_buf_release(req); |
0822f514 | 5684 | |
d339adc1 AA |
5685 | please_key_low = (__u64 *)lease_key; |
5686 | please_key_high = (__u64 *)(lease_key+8); | |
0822f514 PS |
5687 | if (rc) { |
5688 | cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE); | |
179e44d4 SF |
5689 | trace_smb3_lease_err(le32_to_cpu(lease_state), tcon->tid, |
5690 | ses->Suid, *please_key_low, *please_key_high, rc); | |
f96637be | 5691 | cifs_dbg(FYI, "Send error in Lease Break = %d\n", rc); |
179e44d4 SF |
5692 | } else |
5693 | trace_smb3_lease_done(le32_to_cpu(lease_state), tcon->tid, | |
5694 | ses->Suid, *please_key_low, *please_key_high); | |
0822f514 PS |
5695 | |
5696 | return rc; | |
5697 | } |