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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 | { |
31473fc4 PS |
91 | shdr->ProtocolId = SMB2_PROTO_NUMBER; |
92 | shdr->StructureSize = cpu_to_le16(64); | |
93 | shdr->Command = smb2_cmd; | |
352d96f3 | 94 | if (server) { |
7d414f39 | 95 | spin_lock(&server->req_lock); |
69dc4b18 | 96 | /* Request up to 10 credits but don't go over the limit. */ |
141891f4 | 97 | if (server->credits >= server->max_credits) |
31473fc4 | 98 | shdr->CreditRequest = cpu_to_le16(0); |
7d414f39 | 99 | else |
31473fc4 | 100 | shdr->CreditRequest = cpu_to_le16( |
141891f4 | 101 | min_t(int, server->max_credits - |
69dc4b18 | 102 | server->credits, 10)); |
7d414f39 RL |
103 | spin_unlock(&server->req_lock); |
104 | } else { | |
31473fc4 | 105 | shdr->CreditRequest = cpu_to_le16(2); |
7d414f39 | 106 | } |
0d35e382 | 107 | shdr->Id.SyncId.ProcessId = cpu_to_le32((__u16)current->tgid); |
ec2e4523 PS |
108 | |
109 | if (!tcon) | |
110 | goto out; | |
111 | ||
2b80d049 SF |
112 | /* GLOBAL_CAP_LARGE_MTU will only be set if dialect > SMB2.02 */ |
113 | /* See sections 2.2.4 and 3.2.4.1.5 of MS-SMB2 */ | |
352d96f3 | 114 | if (server && (server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) |
31473fc4 | 115 | shdr->CreditCharge = cpu_to_le16(1); |
2b80d049 SF |
116 | /* else CreditCharge MBZ */ |
117 | ||
0d35e382 | 118 | shdr->Id.SyncId.TreeId = cpu_to_le32(tcon->tid); |
ec2e4523 PS |
119 | /* Uid is not converted */ |
120 | if (tcon->ses) | |
0d35e382 | 121 | shdr->SessionId = cpu_to_le64(tcon->ses->Suid); |
f87ab88b SF |
122 | |
123 | /* | |
124 | * If we would set SMB2_FLAGS_DFS_OPERATIONS on open we also would have | |
125 | * to pass the path on the Open SMB prefixed by \\server\share. | |
126 | * Not sure when we would need to do the augmented path (if ever) and | |
127 | * setting this flag breaks the SMB2 open operation since it is | |
128 | * illegal to send an empty path name (without \\server\share prefix) | |
129 | * when the DFS flag is set in the SMB open header. We could | |
130 | * consider setting the flag on all operations other than open | |
131 | * but it is safer to net set it for now. | |
132 | */ | |
133 | /* if (tcon->share_flags & SHI1005_FLAGS_DFS) | |
31473fc4 | 134 | shdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS; */ |
f87ab88b | 135 | |
352d96f3 | 136 | if (server && server->sign && !smb3_encryption_required(tcon)) |
31473fc4 | 137 | shdr->Flags |= SMB2_FLAGS_SIGNED; |
ec2e4523 | 138 | out: |
ec2e4523 PS |
139 | return; |
140 | } | |
141 | ||
142 | static int | |
352d96f3 AA |
143 | smb2_reconnect(__le16 smb2_command, struct cifs_tcon *tcon, |
144 | struct TCP_Server_Info *server) | |
ec2e4523 | 145 | { |
350f4a56 | 146 | int rc = 0; |
aa24d1e9 PS |
147 | struct nls_table *nls_codepage; |
148 | struct cifs_ses *ses; | |
a3a53b76 | 149 | int retries; |
aa24d1e9 PS |
150 | |
151 | /* | |
152 | * SMB2s NegProt, SessSetup, Logoff do not have tcon yet so | |
153 | * check for tcp and smb session status done differently | |
154 | * for those three - in the calling routine. | |
155 | */ | |
156 | if (tcon == NULL) | |
7ffbe655 | 157 | return 0; |
aa24d1e9 | 158 | |
c88f7dcd PA |
159 | /* |
160 | * Need to also skip SMB2_IOCTL because it is used for checking nested dfs links in | |
161 | * cifs_tree_connect(). | |
162 | */ | |
163 | if (smb2_command == SMB2_TREE_CONNECT || smb2_command == SMB2_IOCTL) | |
7ffbe655 | 164 | return 0; |
aa24d1e9 | 165 | |
d7d7a66a | 166 | spin_lock(&tcon->tc_lock); |
fdf59eb5 | 167 | if (tcon->status == TID_EXITING) { |
aa24d1e9 PS |
168 | /* |
169 | * only tree disconnect, open, and write, | |
170 | * (and ulogoff which does not have tcon) | |
171 | * are allowed as we start force umount. | |
172 | */ | |
173 | if ((smb2_command != SMB2_WRITE) && | |
174 | (smb2_command != SMB2_CREATE) && | |
175 | (smb2_command != SMB2_TREE_DISCONNECT)) { | |
d7d7a66a | 176 | spin_unlock(&tcon->tc_lock); |
f96637be JP |
177 | cifs_dbg(FYI, "can not send cmd %d while umounting\n", |
178 | smb2_command); | |
aa24d1e9 PS |
179 | return -ENODEV; |
180 | } | |
181 | } | |
d7d7a66a | 182 | spin_unlock(&tcon->tc_lock); |
dd3cd870 | 183 | if ((!tcon->ses) || (tcon->ses->ses_status == SES_EXITING) || |
352d96f3 | 184 | (!tcon->ses->server) || !server) |
aa24d1e9 PS |
185 | return -EIO; |
186 | ||
187 | ses = tcon->ses; | |
a3a53b76 PA |
188 | retries = server->nr_targets; |
189 | ||
aa24d1e9 | 190 | /* |
a3a53b76 PA |
191 | * Give demultiplex thread up to 10 seconds to each target available for |
192 | * reconnect -- should be greater than cifs socket timeout which is 7 | |
193 | * seconds. | |
aa24d1e9 PS |
194 | */ |
195 | while (server->tcpStatus == CifsNeedReconnect) { | |
196 | /* | |
197 | * Return to caller for TREE_DISCONNECT and LOGOFF and CLOSE | |
198 | * here since they are implicitly done when session drops. | |
199 | */ | |
200 | switch (smb2_command) { | |
201 | /* | |
202 | * BB Should we keep oplock break and add flush to exceptions? | |
203 | */ | |
204 | case SMB2_TREE_DISCONNECT: | |
205 | case SMB2_CANCEL: | |
206 | case SMB2_CLOSE: | |
207 | case SMB2_OPLOCK_BREAK: | |
208 | return -EAGAIN; | |
209 | } | |
210 | ||
7ffbe655 PA |
211 | rc = wait_event_interruptible_timeout(server->response_q, |
212 | (server->tcpStatus != CifsNeedReconnect), | |
213 | 10 * HZ); | |
214 | if (rc < 0) { | |
a0a3036b JP |
215 | cifs_dbg(FYI, "%s: aborting reconnect due to a received signal by the process\n", |
216 | __func__); | |
7ffbe655 PA |
217 | return -ERESTARTSYS; |
218 | } | |
aa24d1e9 PS |
219 | |
220 | /* are we still trying to reconnect? */ | |
d7d7a66a | 221 | spin_lock(&server->srv_lock); |
080dc5e5 | 222 | if (server->tcpStatus != CifsNeedReconnect) { |
d7d7a66a | 223 | spin_unlock(&server->srv_lock); |
aa24d1e9 | 224 | break; |
080dc5e5 | 225 | } |
d7d7a66a | 226 | spin_unlock(&server->srv_lock); |
aa24d1e9 | 227 | |
c54849dd | 228 | if (retries && --retries) |
a3a53b76 PA |
229 | continue; |
230 | ||
aa24d1e9 PS |
231 | /* |
232 | * on "soft" mounts we wait once. Hard mounts keep | |
233 | * retrying until process is killed or server comes | |
234 | * back on-line | |
235 | */ | |
236 | if (!tcon->retry) { | |
f96637be | 237 | cifs_dbg(FYI, "gave up waiting on reconnect in smb_init\n"); |
aa24d1e9 PS |
238 | return -EHOSTDOWN; |
239 | } | |
a3a53b76 | 240 | retries = server->nr_targets; |
aa24d1e9 PS |
241 | } |
242 | ||
d1a931ce SP |
243 | spin_lock(&ses->chan_lock); |
244 | if (!cifs_chan_needs_reconnect(ses, server) && !tcon->need_reconnect) { | |
245 | spin_unlock(&ses->chan_lock); | |
7ffbe655 | 246 | return 0; |
d1a931ce | 247 | } |
88b024f5 | 248 | spin_unlock(&ses->chan_lock); |
d1a931ce SP |
249 | cifs_dbg(FYI, "sess reconnect mask: 0x%lx, tcon reconnect: %d", |
250 | tcon->ses->chans_need_reconnect, | |
251 | tcon->need_reconnect); | |
aa24d1e9 PS |
252 | |
253 | nls_codepage = load_nls_default(); | |
254 | ||
76e75270 SC |
255 | /* |
256 | * Recheck after acquire mutex. If another thread is negotiating | |
257 | * and the server never sends an answer the socket will be closed | |
258 | * and tcpStatus set to reconnect. | |
259 | */ | |
d7d7a66a | 260 | spin_lock(&server->srv_lock); |
76e75270 | 261 | if (server->tcpStatus == CifsNeedReconnect) { |
d7d7a66a | 262 | spin_unlock(&server->srv_lock); |
76e75270 | 263 | rc = -EHOSTDOWN; |
76e75270 SC |
264 | goto out; |
265 | } | |
d7d7a66a | 266 | spin_unlock(&server->srv_lock); |
76e75270 | 267 | |
d1a931ce SP |
268 | /* |
269 | * need to prevent multiple threads trying to simultaneously | |
270 | * reconnect the same SMB session | |
271 | */ | |
272 | spin_lock(&ses->chan_lock); | |
273 | if (!cifs_chan_needs_reconnect(ses, server)) { | |
274 | spin_unlock(&ses->chan_lock); | |
275 | ||
f486ef8e | 276 | /* this means that we only need to tree connect */ |
d1a931ce SP |
277 | if (tcon->need_reconnect) |
278 | goto skip_sess_setup; | |
279 | ||
d1a931ce SP |
280 | goto out; |
281 | } | |
282 | spin_unlock(&ses->chan_lock); | |
283 | ||
73f9bfbe | 284 | mutex_lock(&ses->session_mutex); |
f486ef8e | 285 | rc = cifs_negotiate_protocol(0, ses, server); |
d1a931ce | 286 | if (!rc) { |
f486ef8e | 287 | rc = cifs_setup_session(0, ses, server, nls_codepage); |
b0dd940e | 288 | if ((rc == -EACCES) && !tcon->retry) { |
f486ef8e | 289 | mutex_unlock(&ses->session_mutex); |
73f9bfbe | 290 | rc = -EHOSTDOWN; |
b0dd940e | 291 | goto failed; |
8ea21823 SP |
292 | } else if (rc) { |
293 | mutex_unlock(&ses->session_mutex); | |
294 | goto out; | |
b0dd940e | 295 | } |
3663c904 | 296 | } else { |
73f9bfbe | 297 | mutex_unlock(&ses->session_mutex); |
aa24d1e9 PS |
298 | goto out; |
299 | } | |
3663c904 | 300 | mutex_unlock(&ses->session_mutex); |
aa24d1e9 | 301 | |
d1a931ce | 302 | skip_sess_setup: |
3663c904 SP |
303 | mutex_lock(&ses->session_mutex); |
304 | if (!tcon->need_reconnect) { | |
305 | mutex_unlock(&ses->session_mutex); | |
306 | goto out; | |
307 | } | |
aa24d1e9 | 308 | cifs_mark_open_files_invalid(tcon); |
96a988ff PS |
309 | if (tcon->use_persistent) |
310 | tcon->need_reopen_files = true; | |
52ace1ef | 311 | |
565674d6 | 312 | rc = cifs_tree_connect(0, tcon, nls_codepage); |
73f9bfbe | 313 | mutex_unlock(&ses->session_mutex); |
52ace1ef | 314 | |
f96637be | 315 | cifs_dbg(FYI, "reconnect tcon rc = %d\n", rc); |
c318e6c2 SF |
316 | if (rc) { |
317 | /* If sess reconnected but tcon didn't, something strange ... */ | |
a0a3036b | 318 | pr_warn_once("reconnect tcon failed rc = %d\n", rc); |
aa24d1e9 | 319 | goto out; |
c318e6c2 | 320 | } |
96a988ff PS |
321 | |
322 | if (smb2_command != SMB2_INTERNAL_CMD) | |
b08484d7 | 323 | mod_delayed_work(cifsiod_wq, &server->reconnect, 0); |
96a988ff | 324 | |
aa24d1e9 | 325 | atomic_inc(&tconInfoReconnectCount); |
aa24d1e9 PS |
326 | out: |
327 | /* | |
328 | * Check if handle based operation so we know whether we can continue | |
329 | * or not without returning to caller to reset file handle. | |
330 | */ | |
331 | /* | |
332 | * BB Is flush done by server on drop of tcp session? Should we special | |
333 | * case it and skip above? | |
334 | */ | |
335 | switch (smb2_command) { | |
336 | case SMB2_FLUSH: | |
337 | case SMB2_READ: | |
338 | case SMB2_WRITE: | |
339 | case SMB2_LOCK: | |
340 | case SMB2_IOCTL: | |
341 | case SMB2_QUERY_DIRECTORY: | |
342 | case SMB2_CHANGE_NOTIFY: | |
343 | case SMB2_QUERY_INFO: | |
344 | case SMB2_SET_INFO: | |
4772c795 | 345 | rc = -EAGAIN; |
aa24d1e9 | 346 | } |
b0dd940e | 347 | failed: |
aa24d1e9 | 348 | unload_nls(nls_codepage); |
ec2e4523 PS |
349 | return rc; |
350 | } | |
351 | ||
cb200bd6 | 352 | static void |
352d96f3 AA |
353 | fill_small_buf(__le16 smb2_command, struct cifs_tcon *tcon, |
354 | struct TCP_Server_Info *server, | |
355 | void *buf, | |
cb200bd6 PS |
356 | unsigned int *total_len) |
357 | { | |
0f46608a | 358 | struct smb2_pdu *spdu = buf; |
cb200bd6 PS |
359 | /* lookup word count ie StructureSize from table */ |
360 | __u16 parmsize = smb2_req_struct_sizes[le16_to_cpu(smb2_command)]; | |
361 | ||
362 | /* | |
363 | * smaller than SMALL_BUFFER_SIZE but bigger than fixed area of | |
364 | * largest operations (Create) | |
365 | */ | |
366 | memset(buf, 0, 256); | |
367 | ||
0d35e382 | 368 | smb2_hdr_assemble(&spdu->hdr, smb2_command, tcon, server); |
cb200bd6 PS |
369 | spdu->StructureSize2 = cpu_to_le16(parmsize); |
370 | ||
0d35e382 | 371 | *total_len = parmsize + sizeof(struct smb2_hdr); |
cb200bd6 PS |
372 | } |
373 | ||
ec2e4523 PS |
374 | /* |
375 | * Allocate and return pointer to an SMB request hdr, and set basic | |
376 | * SMB information in the SMB header. If the return code is zero, this | |
305428ac | 377 | * function must have filled in request_buf pointer. |
ec2e4523 | 378 | */ |
84a1f5b1 | 379 | static int __smb2_plain_req_init(__le16 smb2_command, struct cifs_tcon *tcon, |
352d96f3 AA |
380 | struct TCP_Server_Info *server, |
381 | void **request_buf, unsigned int *total_len) | |
ec2e4523 | 382 | { |
ec2e4523 | 383 | /* BB eventually switch this to SMB2 specific small buf size */ |
f46ecbd9 SB |
384 | if (smb2_command == SMB2_SET_INFO) |
385 | *request_buf = cifs_buf_get(); | |
386 | else | |
387 | *request_buf = cifs_small_buf_get(); | |
ec2e4523 PS |
388 | if (*request_buf == NULL) { |
389 | /* BB should we add a retry in here if not a writepage? */ | |
390 | return -ENOMEM; | |
391 | } | |
392 | ||
352d96f3 | 393 | fill_small_buf(smb2_command, tcon, server, |
0d35e382 | 394 | (struct smb2_hdr *)(*request_buf), |
305428ac | 395 | total_len); |
ec2e4523 PS |
396 | |
397 | if (tcon != NULL) { | |
ec2e4523 PS |
398 | uint16_t com_code = le16_to_cpu(smb2_command); |
399 | cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_sent[com_code]); | |
ec2e4523 PS |
400 | cifs_stats_inc(&tcon->num_smbs_sent); |
401 | } | |
402 | ||
84a1f5b1 PAS |
403 | return 0; |
404 | } | |
405 | ||
406 | static int smb2_plain_req_init(__le16 smb2_command, struct cifs_tcon *tcon, | |
352d96f3 | 407 | struct TCP_Server_Info *server, |
84a1f5b1 PAS |
408 | void **request_buf, unsigned int *total_len) |
409 | { | |
410 | int rc; | |
411 | ||
352d96f3 | 412 | rc = smb2_reconnect(smb2_command, tcon, server); |
84a1f5b1 PAS |
413 | if (rc) |
414 | return rc; | |
415 | ||
352d96f3 | 416 | return __smb2_plain_req_init(smb2_command, tcon, server, request_buf, |
84a1f5b1 PAS |
417 | total_len); |
418 | } | |
419 | ||
420 | static int smb2_ioctl_req_init(u32 opcode, struct cifs_tcon *tcon, | |
352d96f3 | 421 | struct TCP_Server_Info *server, |
84a1f5b1 PAS |
422 | void **request_buf, unsigned int *total_len) |
423 | { | |
424 | /* Skip reconnect only for FSCTL_VALIDATE_NEGOTIATE_INFO IOCTLs */ | |
425 | if (opcode == FSCTL_VALIDATE_NEGOTIATE_INFO) { | |
352d96f3 AA |
426 | return __smb2_plain_req_init(SMB2_IOCTL, tcon, server, |
427 | request_buf, total_len); | |
84a1f5b1 | 428 | } |
352d96f3 AA |
429 | return smb2_plain_req_init(SMB2_IOCTL, tcon, server, |
430 | request_buf, total_len); | |
ec2e4523 PS |
431 | } |
432 | ||
d7bef4c4 | 433 | /* For explanation of negotiate contexts see MS-SMB2 section 2.2.3.1 */ |
ebb3a9d4 SF |
434 | |
435 | static void | |
436 | build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt) | |
437 | { | |
438 | pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES; | |
439 | pneg_ctxt->DataLength = cpu_to_le16(38); | |
440 | pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1); | |
fc0b3844 RS |
441 | pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE); |
442 | get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE); | |
ebb3a9d4 SF |
443 | pneg_ctxt->HashAlgorithms = SMB2_PREAUTH_INTEGRITY_SHA512; |
444 | } | |
445 | ||
26ea888f SF |
446 | static void |
447 | build_compression_ctxt(struct smb2_compression_capabilities_context *pneg_ctxt) | |
448 | { | |
449 | pneg_ctxt->ContextType = SMB2_COMPRESSION_CAPABILITIES; | |
450 | pneg_ctxt->DataLength = | |
451 | cpu_to_le16(sizeof(struct smb2_compression_capabilities_context) | |
452 | - sizeof(struct smb2_neg_context)); | |
453 | pneg_ctxt->CompressionAlgorithmCount = cpu_to_le16(3); | |
454 | pneg_ctxt->CompressionAlgorithms[0] = SMB3_COMPRESS_LZ77; | |
455 | pneg_ctxt->CompressionAlgorithms[1] = SMB3_COMPRESS_LZ77_HUFF; | |
456 | pneg_ctxt->CompressionAlgorithms[2] = SMB3_COMPRESS_LZNT1; | |
457 | } | |
458 | ||
53d31a3f SF |
459 | static unsigned int |
460 | build_signing_ctxt(struct smb2_signing_capabilities *pneg_ctxt) | |
461 | { | |
462 | unsigned int ctxt_len = sizeof(struct smb2_signing_capabilities); | |
463 | unsigned short num_algs = 1; /* number of signing algorithms sent */ | |
464 | ||
465 | pneg_ctxt->ContextType = SMB2_SIGNING_CAPABILITIES; | |
466 | /* | |
467 | * Context Data length must be rounded to multiple of 8 for some servers | |
468 | */ | |
469 | pneg_ctxt->DataLength = cpu_to_le16(DIV_ROUND_UP( | |
470 | sizeof(struct smb2_signing_capabilities) - | |
471 | sizeof(struct smb2_neg_context) + | |
472 | (num_algs * 2 /* sizeof u16 */), 8) * 8); | |
473 | pneg_ctxt->SigningAlgorithmCount = cpu_to_le16(num_algs); | |
474 | pneg_ctxt->SigningAlgorithms[0] = cpu_to_le16(SIGNING_ALG_AES_CMAC); | |
475 | ||
476 | ctxt_len += 2 /* sizeof le16 */ * num_algs; | |
477 | ctxt_len = DIV_ROUND_UP(ctxt_len, 8) * 8; | |
478 | return ctxt_len; | |
479 | /* TBD add SIGNING_ALG_AES_GMAC and/or SIGNING_ALG_HMAC_SHA256 */ | |
480 | } | |
481 | ||
ebb3a9d4 SF |
482 | static void |
483 | build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt) | |
484 | { | |
485 | pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES; | |
fbfd0b46 SF |
486 | if (require_gcm_256) { |
487 | pneg_ctxt->DataLength = cpu_to_le16(4); /* Cipher Count + 1 cipher */ | |
488 | pneg_ctxt->CipherCount = cpu_to_le16(1); | |
489 | pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES256_GCM; | |
29e27923 SF |
490 | } else if (enable_gcm_256) { |
491 | pneg_ctxt->DataLength = cpu_to_le16(8); /* Cipher Count + 3 ciphers */ | |
492 | pneg_ctxt->CipherCount = cpu_to_le16(3); | |
493 | pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES128_GCM; | |
494 | pneg_ctxt->Ciphers[1] = SMB2_ENCRYPTION_AES256_GCM; | |
495 | pneg_ctxt->Ciphers[2] = SMB2_ENCRYPTION_AES128_CCM; | |
fbfd0b46 SF |
496 | } else { |
497 | pneg_ctxt->DataLength = cpu_to_le16(6); /* Cipher Count + 2 ciphers */ | |
498 | pneg_ctxt->CipherCount = cpu_to_le16(2); | |
499 | pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES128_GCM; | |
500 | pneg_ctxt->Ciphers[1] = SMB2_ENCRYPTION_AES128_CCM; | |
501 | } | |
ebb3a9d4 SF |
502 | } |
503 | ||
96d3cca1 SF |
504 | static unsigned int |
505 | build_netname_ctxt(struct smb2_netname_neg_context *pneg_ctxt, char *hostname) | |
506 | { | |
507 | struct nls_table *cp = load_nls_default(); | |
508 | ||
509 | pneg_ctxt->ContextType = SMB2_NETNAME_NEGOTIATE_CONTEXT_ID; | |
510 | ||
511 | /* copy up to max of first 100 bytes of server name to NetName field */ | |
df58fae7 | 512 | pneg_ctxt->DataLength = cpu_to_le16(2 * cifs_strtoUTF16(pneg_ctxt->NetName, hostname, 100, cp)); |
96d3cca1 SF |
513 | /* context size is DataLength + minimal smb2_neg_context */ |
514 | return DIV_ROUND_UP(le16_to_cpu(pneg_ctxt->DataLength) + | |
515 | sizeof(struct smb2_neg_context), 8) * 8; | |
516 | } | |
517 | ||
fcef0db6 SF |
518 | static void |
519 | build_posix_ctxt(struct smb2_posix_neg_context *pneg_ctxt) | |
520 | { | |
521 | pneg_ctxt->ContextType = SMB2_POSIX_EXTENSIONS_AVAILABLE; | |
522 | pneg_ctxt->DataLength = cpu_to_le16(POSIX_CTXT_DATA_LEN); | |
0d481325 SF |
523 | /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */ |
524 | pneg_ctxt->Name[0] = 0x93; | |
525 | pneg_ctxt->Name[1] = 0xAD; | |
526 | pneg_ctxt->Name[2] = 0x25; | |
527 | pneg_ctxt->Name[3] = 0x50; | |
528 | pneg_ctxt->Name[4] = 0x9C; | |
529 | pneg_ctxt->Name[5] = 0xB4; | |
530 | pneg_ctxt->Name[6] = 0x11; | |
531 | pneg_ctxt->Name[7] = 0xE7; | |
532 | pneg_ctxt->Name[8] = 0xB4; | |
533 | pneg_ctxt->Name[9] = 0x23; | |
534 | pneg_ctxt->Name[10] = 0x83; | |
535 | pneg_ctxt->Name[11] = 0xDE; | |
536 | pneg_ctxt->Name[12] = 0x96; | |
537 | pneg_ctxt->Name[13] = 0x8B; | |
538 | pneg_ctxt->Name[14] = 0xCD; | |
539 | pneg_ctxt->Name[15] = 0x7C; | |
fcef0db6 SF |
540 | } |
541 | ||
ebb3a9d4 | 542 | static void |
13cacea7 | 543 | assemble_neg_contexts(struct smb2_negotiate_req *req, |
9fe5ff1c | 544 | struct TCP_Server_Info *server, unsigned int *total_len) |
ebb3a9d4 | 545 | { |
a9f76cf8 | 546 | char *pneg_ctxt; |
9de74996 | 547 | char *hostname = NULL; |
53d31a3f | 548 | unsigned int ctxt_len, neg_context_count; |
ebb3a9d4 | 549 | |
d5c7076b SF |
550 | if (*total_len > 200) { |
551 | /* In case length corrupted don't want to overrun smb buffer */ | |
afe6f653 | 552 | cifs_server_dbg(VFS, "Bad frame length assembling neg contexts\n"); |
d5c7076b SF |
553 | return; |
554 | } | |
555 | ||
556 | /* | |
557 | * round up total_len of fixed part of SMB3 negotiate request to 8 | |
558 | * byte boundary before adding negotiate contexts | |
559 | */ | |
560 | *total_len = roundup(*total_len, 8); | |
561 | ||
562 | pneg_ctxt = (*total_len) + (char *)req; | |
563 | req->NegotiateContextOffset = cpu_to_le32(*total_len); | |
564 | ||
ebb3a9d4 | 565 | build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt); |
fcef0db6 SF |
566 | ctxt_len = DIV_ROUND_UP(sizeof(struct smb2_preauth_neg_context), 8) * 8; |
567 | *total_len += ctxt_len; | |
568 | pneg_ctxt += ctxt_len; | |
13cacea7 | 569 | |
ebb3a9d4 | 570 | build_encrypt_ctxt((struct smb2_encryption_neg_context *)pneg_ctxt); |
fcef0db6 SF |
571 | ctxt_len = DIV_ROUND_UP(sizeof(struct smb2_encryption_neg_context), 8) * 8; |
572 | *total_len += ctxt_len; | |
573 | pneg_ctxt += ctxt_len; | |
574 | ||
9de74996 SP |
575 | /* |
576 | * secondary channels don't have the hostname field populated | |
577 | * use the hostname field in the primary channel instead | |
578 | */ | |
579 | hostname = CIFS_SERVER_IS_CHAN(server) ? | |
580 | server->primary_server->hostname : server->hostname; | |
581 | if (hostname && (hostname[0] != 0)) { | |
73130a7b | 582 | ctxt_len = build_netname_ctxt((struct smb2_netname_neg_context *)pneg_ctxt, |
9de74996 | 583 | hostname); |
73130a7b SF |
584 | *total_len += ctxt_len; |
585 | pneg_ctxt += ctxt_len; | |
73130a7b | 586 | neg_context_count = 3; |
32f31918 SF |
587 | } else |
588 | neg_context_count = 2; | |
589 | ||
590 | build_posix_ctxt((struct smb2_posix_neg_context *)pneg_ctxt); | |
591 | *total_len += sizeof(struct smb2_posix_neg_context); | |
592 | pneg_ctxt += sizeof(struct smb2_posix_neg_context); | |
593 | neg_context_count++; | |
53d31a3f | 594 | |
9fe5ff1c SF |
595 | if (server->compress_algorithm) { |
596 | build_compression_ctxt((struct smb2_compression_capabilities_context *) | |
26ea888f | 597 | pneg_ctxt); |
9fe5ff1c SF |
598 | ctxt_len = DIV_ROUND_UP( |
599 | sizeof(struct smb2_compression_capabilities_context), | |
600 | 8) * 8; | |
601 | *total_len += ctxt_len; | |
602 | pneg_ctxt += ctxt_len; | |
53d31a3f SF |
603 | neg_context_count++; |
604 | } | |
96d3cca1 | 605 | |
53d31a3f SF |
606 | if (enable_negotiate_signing) { |
607 | ctxt_len = build_signing_ctxt((struct smb2_signing_capabilities *) | |
608 | pneg_ctxt); | |
609 | *total_len += ctxt_len; | |
610 | pneg_ctxt += ctxt_len; | |
611 | neg_context_count++; | |
612 | } | |
613 | ||
614 | /* check for and add transport_capabilities and signing capabilities */ | |
615 | req->NegotiateContextCount = cpu_to_le16(neg_context_count); | |
96d3cca1 | 616 | |
ebb3a9d4 | 617 | } |
5100d8a3 SF |
618 | |
619 | static void decode_preauth_context(struct smb2_preauth_neg_context *ctxt) | |
620 | { | |
621 | unsigned int len = le16_to_cpu(ctxt->DataLength); | |
622 | ||
623 | /* If invalid preauth context warn but use what we requested, SHA-512 */ | |
624 | if (len < MIN_PREAUTH_CTXT_DATA_LEN) { | |
a0a3036b | 625 | pr_warn_once("server sent bad preauth context\n"); |
5100d8a3 | 626 | return; |
7955f105 SF |
627 | } else if (len < MIN_PREAUTH_CTXT_DATA_LEN + le16_to_cpu(ctxt->SaltLength)) { |
628 | pr_warn_once("server sent invalid SaltLength\n"); | |
629 | return; | |
5100d8a3 SF |
630 | } |
631 | if (le16_to_cpu(ctxt->HashAlgorithmCount) != 1) | |
a0a3036b | 632 | pr_warn_once("Invalid SMB3 hash algorithm count\n"); |
5100d8a3 | 633 | if (ctxt->HashAlgorithms != SMB2_PREAUTH_INTEGRITY_SHA512) |
a0a3036b | 634 | pr_warn_once("unknown SMB3 hash algorithm\n"); |
5100d8a3 SF |
635 | } |
636 | ||
26ea888f SF |
637 | static void decode_compress_ctx(struct TCP_Server_Info *server, |
638 | struct smb2_compression_capabilities_context *ctxt) | |
639 | { | |
640 | unsigned int len = le16_to_cpu(ctxt->DataLength); | |
641 | ||
642 | /* sizeof compress context is a one element compression capbility struct */ | |
643 | if (len < 10) { | |
a0a3036b | 644 | pr_warn_once("server sent bad compression cntxt\n"); |
26ea888f SF |
645 | return; |
646 | } | |
647 | if (le16_to_cpu(ctxt->CompressionAlgorithmCount) != 1) { | |
a0a3036b | 648 | pr_warn_once("Invalid SMB3 compress algorithm count\n"); |
26ea888f SF |
649 | return; |
650 | } | |
651 | if (le16_to_cpu(ctxt->CompressionAlgorithms[0]) > 3) { | |
a0a3036b | 652 | pr_warn_once("unknown compression algorithm\n"); |
26ea888f SF |
653 | return; |
654 | } | |
655 | server->compress_algorithm = ctxt->CompressionAlgorithms[0]; | |
656 | } | |
657 | ||
5100d8a3 SF |
658 | static int decode_encrypt_ctx(struct TCP_Server_Info *server, |
659 | struct smb2_encryption_neg_context *ctxt) | |
660 | { | |
661 | unsigned int len = le16_to_cpu(ctxt->DataLength); | |
662 | ||
663 | cifs_dbg(FYI, "decode SMB3.11 encryption neg context of len %d\n", len); | |
664 | if (len < MIN_ENCRYPT_CTXT_DATA_LEN) { | |
a0a3036b | 665 | pr_warn_once("server sent bad crypto ctxt len\n"); |
5100d8a3 SF |
666 | return -EINVAL; |
667 | } | |
668 | ||
669 | if (le16_to_cpu(ctxt->CipherCount) != 1) { | |
a0a3036b | 670 | pr_warn_once("Invalid SMB3.11 cipher count\n"); |
5100d8a3 SF |
671 | return -EINVAL; |
672 | } | |
673 | cifs_dbg(FYI, "SMB311 cipher type:%d\n", le16_to_cpu(ctxt->Ciphers[0])); | |
511ac89e SF |
674 | if (require_gcm_256) { |
675 | if (ctxt->Ciphers[0] != SMB2_ENCRYPTION_AES256_GCM) { | |
676 | cifs_dbg(VFS, "Server does not support requested encryption type (AES256 GCM)\n"); | |
677 | return -EOPNOTSUPP; | |
678 | } | |
679 | } else if (ctxt->Ciphers[0] == 0) { | |
acf96fef SF |
680 | /* |
681 | * e.g. if server only supported AES256_CCM (very unlikely) | |
682 | * or server supported no encryption types or had all disabled. | |
683 | * Since GLOBAL_CAP_ENCRYPTION will be not set, in the case | |
684 | * in which mount requested encryption ("seal") checks later | |
685 | * on during tree connection will return proper rc, but if | |
686 | * seal not requested by client, since server is allowed to | |
687 | * return 0 to indicate no supported cipher, we can't fail here | |
688 | */ | |
689 | server->cipher_type = 0; | |
690 | server->capabilities &= ~SMB2_GLOBAL_CAP_ENCRYPTION; | |
691 | pr_warn_once("Server does not support requested encryption types\n"); | |
692 | return 0; | |
511ac89e SF |
693 | } else if ((ctxt->Ciphers[0] != SMB2_ENCRYPTION_AES128_CCM) && |
694 | (ctxt->Ciphers[0] != SMB2_ENCRYPTION_AES128_GCM) && | |
695 | (ctxt->Ciphers[0] != SMB2_ENCRYPTION_AES256_GCM)) { | |
696 | /* server returned a cipher we didn't ask for */ | |
a0a3036b | 697 | pr_warn_once("Invalid SMB3.11 cipher returned\n"); |
5100d8a3 SF |
698 | return -EINVAL; |
699 | } | |
700 | server->cipher_type = ctxt->Ciphers[0]; | |
23657ad7 | 701 | server->capabilities |= SMB2_GLOBAL_CAP_ENCRYPTION; |
5100d8a3 SF |
702 | return 0; |
703 | } | |
704 | ||
53d31a3f SF |
705 | static void decode_signing_ctx(struct TCP_Server_Info *server, |
706 | struct smb2_signing_capabilities *pctxt) | |
707 | { | |
708 | unsigned int len = le16_to_cpu(pctxt->DataLength); | |
709 | ||
710 | if ((len < 4) || (len > 16)) { | |
711 | pr_warn_once("server sent bad signing negcontext\n"); | |
712 | return; | |
713 | } | |
714 | if (le16_to_cpu(pctxt->SigningAlgorithmCount) != 1) { | |
715 | pr_warn_once("Invalid signing algorithm count\n"); | |
716 | return; | |
717 | } | |
718 | if (le16_to_cpu(pctxt->SigningAlgorithms[0]) > 2) { | |
719 | pr_warn_once("unknown signing algorithm\n"); | |
720 | return; | |
721 | } | |
722 | ||
723 | server->signing_negotiated = true; | |
724 | server->signing_algorithm = le16_to_cpu(pctxt->SigningAlgorithms[0]); | |
725 | cifs_dbg(FYI, "signing algorithm %d chosen\n", | |
726 | server->signing_algorithm); | |
727 | } | |
728 | ||
729 | ||
5100d8a3 | 730 | static int smb311_decode_neg_context(struct smb2_negotiate_rsp *rsp, |
977b6170 RS |
731 | struct TCP_Server_Info *server, |
732 | unsigned int len_of_smb) | |
5100d8a3 SF |
733 | { |
734 | struct smb2_neg_context *pctx; | |
735 | unsigned int offset = le32_to_cpu(rsp->NegotiateContextOffset); | |
736 | unsigned int ctxt_cnt = le16_to_cpu(rsp->NegotiateContextCount); | |
5100d8a3 SF |
737 | unsigned int len_of_ctxts, i; |
738 | int rc = 0; | |
739 | ||
740 | cifs_dbg(FYI, "decoding %d negotiate contexts\n", ctxt_cnt); | |
741 | if (len_of_smb <= offset) { | |
afe6f653 | 742 | cifs_server_dbg(VFS, "Invalid response: negotiate context offset\n"); |
5100d8a3 SF |
743 | return -EINVAL; |
744 | } | |
745 | ||
746 | len_of_ctxts = len_of_smb - offset; | |
747 | ||
748 | for (i = 0; i < ctxt_cnt; i++) { | |
749 | int clen; | |
750 | /* check that offset is not beyond end of SMB */ | |
751 | if (len_of_ctxts == 0) | |
752 | break; | |
753 | ||
754 | if (len_of_ctxts < sizeof(struct smb2_neg_context)) | |
755 | break; | |
756 | ||
1fc6ad2f | 757 | pctx = (struct smb2_neg_context *)(offset + (char *)rsp); |
5100d8a3 SF |
758 | clen = le16_to_cpu(pctx->DataLength); |
759 | if (clen > len_of_ctxts) | |
760 | break; | |
761 | ||
762 | if (pctx->ContextType == SMB2_PREAUTH_INTEGRITY_CAPABILITIES) | |
763 | decode_preauth_context( | |
764 | (struct smb2_preauth_neg_context *)pctx); | |
765 | else if (pctx->ContextType == SMB2_ENCRYPTION_CAPABILITIES) | |
766 | rc = decode_encrypt_ctx(server, | |
767 | (struct smb2_encryption_neg_context *)pctx); | |
26ea888f SF |
768 | else if (pctx->ContextType == SMB2_COMPRESSION_CAPABILITIES) |
769 | decode_compress_ctx(server, | |
770 | (struct smb2_compression_capabilities_context *)pctx); | |
fcef0db6 SF |
771 | else if (pctx->ContextType == SMB2_POSIX_EXTENSIONS_AVAILABLE) |
772 | server->posix_ext_supported = true; | |
53d31a3f SF |
773 | else if (pctx->ContextType == SMB2_SIGNING_CAPABILITIES) |
774 | decode_signing_ctx(server, | |
775 | (struct smb2_signing_capabilities *)pctx); | |
5100d8a3 | 776 | else |
afe6f653 | 777 | cifs_server_dbg(VFS, "unknown negcontext of type %d ignored\n", |
5100d8a3 SF |
778 | le16_to_cpu(pctx->ContextType)); |
779 | ||
780 | if (rc) | |
781 | break; | |
782 | /* offsets must be 8 byte aligned */ | |
783 | clen = (clen + 7) & ~0x7; | |
784 | offset += clen + sizeof(struct smb2_neg_context); | |
785 | len_of_ctxts -= clen; | |
786 | } | |
787 | return rc; | |
788 | } | |
789 | ||
ce558b0e SF |
790 | static struct create_posix * |
791 | create_posix_buf(umode_t mode) | |
792 | { | |
793 | struct create_posix *buf; | |
794 | ||
795 | buf = kzalloc(sizeof(struct create_posix), | |
796 | GFP_KERNEL); | |
797 | if (!buf) | |
798 | return NULL; | |
799 | ||
800 | buf->ccontext.DataOffset = | |
801 | cpu_to_le16(offsetof(struct create_posix, Mode)); | |
802 | buf->ccontext.DataLength = cpu_to_le32(4); | |
803 | buf->ccontext.NameOffset = | |
804 | cpu_to_le16(offsetof(struct create_posix, Name)); | |
805 | buf->ccontext.NameLength = cpu_to_le16(16); | |
806 | ||
807 | /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */ | |
808 | buf->Name[0] = 0x93; | |
809 | buf->Name[1] = 0xAD; | |
810 | buf->Name[2] = 0x25; | |
811 | buf->Name[3] = 0x50; | |
812 | buf->Name[4] = 0x9C; | |
813 | buf->Name[5] = 0xB4; | |
814 | buf->Name[6] = 0x11; | |
815 | buf->Name[7] = 0xE7; | |
816 | buf->Name[8] = 0xB4; | |
817 | buf->Name[9] = 0x23; | |
818 | buf->Name[10] = 0x83; | |
819 | buf->Name[11] = 0xDE; | |
820 | buf->Name[12] = 0x96; | |
821 | buf->Name[13] = 0x8B; | |
822 | buf->Name[14] = 0xCD; | |
823 | buf->Name[15] = 0x7C; | |
824 | buf->Mode = cpu_to_le32(mode); | |
a0a3036b | 825 | cifs_dbg(FYI, "mode on posix create 0%o\n", mode); |
ce558b0e SF |
826 | return buf; |
827 | } | |
828 | ||
829 | static int | |
830 | add_posix_context(struct kvec *iov, unsigned int *num_iovec, umode_t mode) | |
831 | { | |
832 | struct smb2_create_req *req = iov[0].iov_base; | |
833 | unsigned int num = *num_iovec; | |
834 | ||
835 | iov[num].iov_base = create_posix_buf(mode); | |
d0959b08 | 836 | if (mode == ACL_NO_MODE) |
a0a3036b | 837 | cifs_dbg(FYI, "Invalid mode\n"); |
ce558b0e SF |
838 | if (iov[num].iov_base == NULL) |
839 | return -ENOMEM; | |
840 | iov[num].iov_len = sizeof(struct create_posix); | |
841 | if (!req->CreateContextsOffset) | |
842 | req->CreateContextsOffset = cpu_to_le32( | |
843 | sizeof(struct smb2_create_req) + | |
844 | iov[num - 1].iov_len); | |
845 | le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_posix)); | |
846 | *num_iovec = num + 1; | |
847 | return 0; | |
848 | } | |
849 | ||
ebb3a9d4 | 850 | |
ec2e4523 PS |
851 | /* |
852 | * | |
853 | * SMB2 Worker functions follow: | |
854 | * | |
855 | * The general structure of the worker functions is: | |
856 | * 1) Call smb2_init (assembles SMB2 header) | |
857 | * 2) Initialize SMB2 command specific fields in fixed length area of SMB | |
858 | * 3) Call smb_sendrcv2 (sends request on socket and waits for response) | |
859 | * 4) Decode SMB2 command specific fields in the fixed length area | |
860 | * 5) Decode variable length data area (if any for this SMB2 command type) | |
861 | * 6) Call free smb buffer | |
862 | * 7) return | |
863 | * | |
864 | */ | |
865 | ||
866 | int | |
f486ef8e SP |
867 | SMB2_negotiate(const unsigned int xid, |
868 | struct cifs_ses *ses, | |
869 | struct TCP_Server_Info *server) | |
ec2e4523 | 870 | { |
40eff45b | 871 | struct smb_rqst rqst; |
ec2e4523 PS |
872 | struct smb2_negotiate_req *req; |
873 | struct smb2_negotiate_rsp *rsp; | |
874 | struct kvec iov[1]; | |
da502f7d | 875 | struct kvec rsp_iov; |
ec2e4523 PS |
876 | int rc = 0; |
877 | int resp_buftype; | |
ec2e4523 PS |
878 | int blob_offset, blob_length; |
879 | char *security_blob; | |
880 | int flags = CIFS_NEG_OP; | |
13cacea7 | 881 | unsigned int total_len; |
ec2e4523 | 882 | |
f96637be | 883 | cifs_dbg(FYI, "Negotiate protocol\n"); |
ec2e4523 | 884 | |
3534b850 JL |
885 | if (!server) { |
886 | WARN(1, "%s: server is NULL!\n", __func__); | |
887 | return -EIO; | |
ec2e4523 PS |
888 | } |
889 | ||
352d96f3 AA |
890 | rc = smb2_plain_req_init(SMB2_NEGOTIATE, NULL, server, |
891 | (void **) &req, &total_len); | |
ec2e4523 PS |
892 | if (rc) |
893 | return rc; | |
894 | ||
0d35e382 | 895 | req->hdr.SessionId = 0; |
0fdfef9a | 896 | |
8bd68c6e AA |
897 | memset(server->preauth_sha_hash, 0, SMB2_PREAUTH_HASH_SIZE); |
898 | memset(ses->preauth_sha_hash, 0, SMB2_PREAUTH_HASH_SIZE); | |
ec2e4523 | 899 | |
f6a6bf7c | 900 | if (strcmp(server->vals->version_string, |
9764c02f SF |
901 | SMB3ANY_VERSION_STRING) == 0) { |
902 | req->Dialects[0] = cpu_to_le16(SMB30_PROT_ID); | |
903 | req->Dialects[1] = cpu_to_le16(SMB302_PROT_ID); | |
6dffa4c2 SF |
904 | req->Dialects[2] = cpu_to_le16(SMB311_PROT_ID); |
905 | req->DialectCount = cpu_to_le16(3); | |
906 | total_len += 6; | |
afe6f653 | 907 | } else if (strcmp(server->vals->version_string, |
9764c02f SF |
908 | SMBDEFAULT_VERSION_STRING) == 0) { |
909 | req->Dialects[0] = cpu_to_le16(SMB21_PROT_ID); | |
910 | req->Dialects[1] = cpu_to_le16(SMB30_PROT_ID); | |
911 | req->Dialects[2] = cpu_to_le16(SMB302_PROT_ID); | |
d5c7076b SF |
912 | req->Dialects[3] = cpu_to_le16(SMB311_PROT_ID); |
913 | req->DialectCount = cpu_to_le16(4); | |
914 | total_len += 8; | |
9764c02f SF |
915 | } else { |
916 | /* otherwise send specific dialect */ | |
f6a6bf7c | 917 | req->Dialects[0] = cpu_to_le16(server->vals->protocol_id); |
9764c02f | 918 | req->DialectCount = cpu_to_le16(1); |
13cacea7 | 919 | total_len += 2; |
9764c02f | 920 | } |
ec2e4523 PS |
921 | |
922 | /* only one of SMB2 signing flags may be set in SMB2 request */ | |
38d77c50 | 923 | if (ses->sign) |
9cd2e62c | 924 | req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED); |
38d77c50 | 925 | else if (global_secflags & CIFSSEC_MAY_SIGN) |
9cd2e62c | 926 | req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED); |
38d77c50 JL |
927 | else |
928 | req->SecurityMode = 0; | |
ec2e4523 | 929 | |
afe6f653 | 930 | req->Capabilities = cpu_to_le32(server->vals->req_capabilities); |
679971e7 SF |
931 | if (ses->chan_max > 1) |
932 | req->Capabilities |= cpu_to_le32(SMB2_GLOBAL_CAP_MULTI_CHANNEL); | |
ec2e4523 | 933 | |
3c5f9be1 | 934 | /* ClientGUID must be zero for SMB2.02 dialect */ |
afe6f653 | 935 | if (server->vals->protocol_id == SMB20_PROT_ID) |
3c5f9be1 | 936 | memset(req->ClientGUID, 0, SMB2_CLIENT_GUID_SIZE); |
ebb3a9d4 | 937 | else { |
3c5f9be1 SF |
938 | memcpy(req->ClientGUID, server->client_guid, |
939 | SMB2_CLIENT_GUID_SIZE); | |
afe6f653 | 940 | if ((server->vals->protocol_id == SMB311_PROT_ID) || |
6dffa4c2 SF |
941 | (strcmp(server->vals->version_string, |
942 | SMB3ANY_VERSION_STRING) == 0) || | |
afe6f653 | 943 | (strcmp(server->vals->version_string, |
d5c7076b | 944 | SMBDEFAULT_VERSION_STRING) == 0)) |
9fe5ff1c | 945 | assemble_neg_contexts(req, server, &total_len); |
ebb3a9d4 | 946 | } |
ec2e4523 | 947 | iov[0].iov_base = (char *)req; |
13cacea7 | 948 | iov[0].iov_len = total_len; |
ec2e4523 | 949 | |
40eff45b RS |
950 | memset(&rqst, 0, sizeof(struct smb_rqst)); |
951 | rqst.rq_iov = iov; | |
952 | rqst.rq_nvec = 1; | |
953 | ||
352d96f3 AA |
954 | rc = cifs_send_recv(xid, ses, server, |
955 | &rqst, &resp_buftype, flags, &rsp_iov); | |
da502f7d PS |
956 | cifs_small_buf_release(req); |
957 | rsp = (struct smb2_negotiate_rsp *)rsp_iov.iov_base; | |
ec2e4523 PS |
958 | /* |
959 | * No tcon so can't do | |
960 | * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]); | |
961 | */ | |
7e682f76 | 962 | if (rc == -EOPNOTSUPP) { |
a0a3036b | 963 | 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 |
964 | goto neg_exit; |
965 | } else if (rc != 0) | |
ec2e4523 PS |
966 | goto neg_exit; |
967 | ||
afe6f653 | 968 | if (strcmp(server->vals->version_string, |
9764c02f SF |
969 | SMB3ANY_VERSION_STRING) == 0) { |
970 | if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) { | |
afe6f653 | 971 | cifs_server_dbg(VFS, |
9764c02f SF |
972 | "SMB2 dialect returned but not requested\n"); |
973 | return -EIO; | |
974 | } else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) { | |
afe6f653 | 975 | cifs_server_dbg(VFS, |
9764c02f SF |
976 | "SMB2.1 dialect returned but not requested\n"); |
977 | return -EIO; | |
6dffa4c2 SF |
978 | } else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID)) { |
979 | /* ops set to 3.0 by default for default so update */ | |
980 | server->ops = &smb311_operations; | |
981 | server->vals = &smb311_values; | |
9764c02f | 982 | } |
afe6f653 | 983 | } else if (strcmp(server->vals->version_string, |
9764c02f SF |
984 | SMBDEFAULT_VERSION_STRING) == 0) { |
985 | if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) { | |
afe6f653 | 986 | cifs_server_dbg(VFS, |
9764c02f SF |
987 | "SMB2 dialect returned but not requested\n"); |
988 | return -EIO; | |
989 | } else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) { | |
990 | /* ops set to 3.0 by default for default so update */ | |
afe6f653 RS |
991 | server->ops = &smb21_operations; |
992 | server->vals = &smb21_values; | |
b57a55e2 | 993 | } else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID)) { |
afe6f653 RS |
994 | server->ops = &smb311_operations; |
995 | server->vals = &smb311_values; | |
b57a55e2 | 996 | } |
590d08d3 | 997 | } else if (le16_to_cpu(rsp->DialectRevision) != |
afe6f653 | 998 | server->vals->protocol_id) { |
9764c02f | 999 | /* if requested single dialect ensure returned dialect matched */ |
a0a3036b JP |
1000 | cifs_server_dbg(VFS, "Invalid 0x%x dialect returned: not requested\n", |
1001 | le16_to_cpu(rsp->DialectRevision)); | |
9764c02f SF |
1002 | return -EIO; |
1003 | } | |
1004 | ||
f96637be | 1005 | cifs_dbg(FYI, "mode 0x%x\n", rsp->SecurityMode); |
ec2e4523 | 1006 | |
e4aa25e7 | 1007 | if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) |
f96637be | 1008 | cifs_dbg(FYI, "negotiated smb2.0 dialect\n"); |
e4aa25e7 | 1009 | else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) |
f96637be | 1010 | cifs_dbg(FYI, "negotiated smb2.1 dialect\n"); |
e4aa25e7 | 1011 | else if (rsp->DialectRevision == cpu_to_le16(SMB30_PROT_ID)) |
f96637be | 1012 | cifs_dbg(FYI, "negotiated smb3.0 dialect\n"); |
20b6d8b4 SF |
1013 | else if (rsp->DialectRevision == cpu_to_le16(SMB302_PROT_ID)) |
1014 | cifs_dbg(FYI, "negotiated smb3.02 dialect\n"); | |
5f7fbf73 SF |
1015 | else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID)) |
1016 | cifs_dbg(FYI, "negotiated smb3.1.1 dialect\n"); | |
ec2e4523 | 1017 | else { |
a0a3036b JP |
1018 | cifs_server_dbg(VFS, "Invalid dialect returned by server 0x%x\n", |
1019 | le16_to_cpu(rsp->DialectRevision)); | |
ec2e4523 PS |
1020 | rc = -EIO; |
1021 | goto neg_exit; | |
1022 | } | |
1023 | server->dialect = le16_to_cpu(rsp->DialectRevision); | |
1024 | ||
8bd68c6e AA |
1025 | /* |
1026 | * Keep a copy of the hash after negprot. This hash will be | |
1027 | * the starting hash value for all sessions made from this | |
1028 | * server. | |
1029 | */ | |
1030 | memcpy(server->preauth_sha_hash, ses->preauth_sha_hash, | |
1031 | SMB2_PREAUTH_HASH_SIZE); | |
0fdfef9a | 1032 | |
e598d1d8 JL |
1033 | /* SMB2 only has an extended negflavor */ |
1034 | server->negflavor = CIFS_NEGFLAVOR_EXTENDED; | |
2365c4ea PS |
1035 | /* set it to the maximum buffer size value we can send with 1 credit */ |
1036 | server->maxBuf = min_t(unsigned int, le32_to_cpu(rsp->MaxTransactSize), | |
1037 | SMB2_MAX_BUFFER_SIZE); | |
ec2e4523 PS |
1038 | server->max_read = le32_to_cpu(rsp->MaxReadSize); |
1039 | server->max_write = le32_to_cpu(rsp->MaxWriteSize); | |
ec2e4523 | 1040 | server->sec_mode = le16_to_cpu(rsp->SecurityMode); |
07108d0e SF |
1041 | if ((server->sec_mode & SMB2_SEC_MODE_FLAGS_ALL) != server->sec_mode) |
1042 | cifs_dbg(FYI, "Server returned unexpected security mode 0x%x\n", | |
1043 | server->sec_mode); | |
ec2e4523 | 1044 | server->capabilities = le32_to_cpu(rsp->Capabilities); |
29e20f9c PS |
1045 | /* Internal types */ |
1046 | server->capabilities |= SMB2_NT_FIND | SMB2_LARGE_FILES; | |
ec2e4523 | 1047 | |
6d2fcfe6 AA |
1048 | /* |
1049 | * SMB3.0 supports only 1 cipher and doesn't have a encryption neg context | |
1050 | * Set the cipher type manually. | |
1051 | */ | |
1052 | if (server->dialect == SMB30_PROT_ID && (server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION)) | |
1053 | server->cipher_type = SMB2_ENCRYPTION_AES128_CCM; | |
1054 | ||
ec2e4523 | 1055 | security_blob = smb2_get_data_area_len(&blob_offset, &blob_length, |
0d35e382 | 1056 | (struct smb2_hdr *)rsp); |
5d875cc9 SF |
1057 | /* |
1058 | * See MS-SMB2 section 2.2.4: if no blob, client picks default which | |
1059 | * for us will be | |
1060 | * ses->sectype = RawNTLMSSP; | |
1061 | * but for time being this is our only auth choice so doesn't matter. | |
1062 | * We just found a server which sets blob length to zero expecting raw. | |
1063 | */ | |
67dbea2c | 1064 | if (blob_length == 0) { |
5d875cc9 | 1065 | cifs_dbg(FYI, "missing security blob on negprot\n"); |
67dbea2c PS |
1066 | server->sec_ntlmssp = true; |
1067 | } | |
3c1bf7e4 | 1068 | |
38d77c50 | 1069 | rc = cifs_enable_signing(server, ses->sign); |
9ddec561 JL |
1070 | if (rc) |
1071 | goto neg_exit; | |
ceb1b0b9 | 1072 | if (blob_length) { |
ebdd207e | 1073 | rc = decode_negTokenInit(security_blob, blob_length, server); |
ceb1b0b9 SF |
1074 | if (rc == 1) |
1075 | rc = 0; | |
1076 | else if (rc == 0) | |
1077 | rc = -EIO; | |
ec2e4523 | 1078 | } |
5100d8a3 | 1079 | |
5100d8a3 SF |
1080 | if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID)) { |
1081 | if (rsp->NegotiateContextCount) | |
977b6170 RS |
1082 | rc = smb311_decode_neg_context(rsp, server, |
1083 | rsp_iov.iov_len); | |
5100d8a3 | 1084 | else |
afe6f653 | 1085 | cifs_server_dbg(VFS, "Missing expected negotiate contexts\n"); |
5100d8a3 | 1086 | } |
ec2e4523 PS |
1087 | neg_exit: |
1088 | free_rsp_buf(resp_buftype, rsp); | |
1089 | return rc; | |
1090 | } | |
5478f9ba | 1091 | |
ff1c038a SF |
1092 | int smb3_validate_negotiate(const unsigned int xid, struct cifs_tcon *tcon) |
1093 | { | |
2796d303 LL |
1094 | int rc; |
1095 | struct validate_negotiate_info_req *pneg_inbuf; | |
fe83bebc | 1096 | struct validate_negotiate_info_rsp *pneg_rsp = NULL; |
ff1c038a | 1097 | u32 rsplen; |
9764c02f | 1098 | u32 inbuflen; /* max of 4 dialects */ |
afe6f653 | 1099 | struct TCP_Server_Info *server = tcon->ses->server; |
ff1c038a SF |
1100 | |
1101 | cifs_dbg(FYI, "validate negotiate\n"); | |
1102 | ||
8bd68c6e | 1103 | /* In SMB3.11 preauth integrity supersedes validate negotiate */ |
afe6f653 | 1104 | if (server->dialect == SMB311_PROT_ID) |
8bd68c6e AA |
1105 | return 0; |
1106 | ||
ff1c038a SF |
1107 | /* |
1108 | * validation ioctl must be signed, so no point sending this if we | |
0603c96f SF |
1109 | * can not sign it (ie are not known user). Even if signing is not |
1110 | * required (enabled but not negotiated), in those cases we selectively | |
ff1c038a | 1111 | * sign just this, the first and only signed request on a connection. |
0603c96f | 1112 | * Having validation of negotiate info helps reduce attack vectors. |
ff1c038a | 1113 | */ |
0603c96f | 1114 | if (tcon->ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST) |
ff1c038a SF |
1115 | return 0; /* validation requires signing */ |
1116 | ||
0603c96f SF |
1117 | if (tcon->ses->user_name == NULL) { |
1118 | cifs_dbg(FYI, "Can't validate negotiate: null user mount\n"); | |
1119 | return 0; /* validation requires signing */ | |
1120 | } | |
1121 | ||
1122 | if (tcon->ses->session_flags & SMB2_SESSION_FLAG_IS_NULL) | |
3175eb9b | 1123 | cifs_tcon_dbg(VFS, "Unexpected null user (anonymous) auth flag sent by server\n"); |
0603c96f | 1124 | |
2796d303 LL |
1125 | pneg_inbuf = kmalloc(sizeof(*pneg_inbuf), GFP_NOFS); |
1126 | if (!pneg_inbuf) | |
1127 | return -ENOMEM; | |
1128 | ||
1129 | pneg_inbuf->Capabilities = | |
afe6f653 | 1130 | cpu_to_le32(server->vals->req_capabilities); |
679971e7 SF |
1131 | if (tcon->ses->chan_max > 1) |
1132 | pneg_inbuf->Capabilities |= cpu_to_le32(SMB2_GLOBAL_CAP_MULTI_CHANNEL); | |
1133 | ||
afe6f653 | 1134 | memcpy(pneg_inbuf->Guid, server->client_guid, |
39552ea8 | 1135 | SMB2_CLIENT_GUID_SIZE); |
ff1c038a SF |
1136 | |
1137 | if (tcon->ses->sign) | |
2796d303 | 1138 | pneg_inbuf->SecurityMode = |
ff1c038a SF |
1139 | cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED); |
1140 | else if (global_secflags & CIFSSEC_MAY_SIGN) | |
2796d303 | 1141 | pneg_inbuf->SecurityMode = |
ff1c038a SF |
1142 | cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED); |
1143 | else | |
2796d303 | 1144 | pneg_inbuf->SecurityMode = 0; |
ff1c038a | 1145 | |
9764c02f | 1146 | |
afe6f653 | 1147 | if (strcmp(server->vals->version_string, |
9764c02f | 1148 | SMB3ANY_VERSION_STRING) == 0) { |
2796d303 LL |
1149 | pneg_inbuf->Dialects[0] = cpu_to_le16(SMB30_PROT_ID); |
1150 | pneg_inbuf->Dialects[1] = cpu_to_le16(SMB302_PROT_ID); | |
6dffa4c2 SF |
1151 | pneg_inbuf->Dialects[2] = cpu_to_le16(SMB311_PROT_ID); |
1152 | pneg_inbuf->DialectCount = cpu_to_le16(3); | |
1153 | /* SMB 2.1 not included so subtract one dialect from len */ | |
2796d303 | 1154 | inbuflen = sizeof(*pneg_inbuf) - |
6dffa4c2 | 1155 | (sizeof(pneg_inbuf->Dialects[0])); |
afe6f653 | 1156 | } else if (strcmp(server->vals->version_string, |
9764c02f | 1157 | SMBDEFAULT_VERSION_STRING) == 0) { |
2796d303 LL |
1158 | pneg_inbuf->Dialects[0] = cpu_to_le16(SMB21_PROT_ID); |
1159 | pneg_inbuf->Dialects[1] = cpu_to_le16(SMB30_PROT_ID); | |
1160 | pneg_inbuf->Dialects[2] = cpu_to_le16(SMB302_PROT_ID); | |
d5c7076b SF |
1161 | pneg_inbuf->Dialects[3] = cpu_to_le16(SMB311_PROT_ID); |
1162 | pneg_inbuf->DialectCount = cpu_to_le16(4); | |
6dffa4c2 | 1163 | /* structure is big enough for 4 dialects */ |
2796d303 | 1164 | inbuflen = sizeof(*pneg_inbuf); |
9764c02f SF |
1165 | } else { |
1166 | /* otherwise specific dialect was requested */ | |
2796d303 | 1167 | pneg_inbuf->Dialects[0] = |
afe6f653 | 1168 | cpu_to_le16(server->vals->protocol_id); |
2796d303 | 1169 | pneg_inbuf->DialectCount = cpu_to_le16(1); |
9764c02f | 1170 | /* structure is big enough for 3 dialects, sending only 1 */ |
2796d303 LL |
1171 | inbuflen = sizeof(*pneg_inbuf) - |
1172 | sizeof(pneg_inbuf->Dialects[0]) * 2; | |
9764c02f | 1173 | } |
ff1c038a SF |
1174 | |
1175 | rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID, | |
400d0ad6 | 1176 | FSCTL_VALIDATE_NEGOTIATE_INFO, |
153322f7 SF |
1177 | (char *)pneg_inbuf, inbuflen, CIFSMaxBufSize, |
1178 | (char **)&pneg_rsp, &rsplen); | |
969ae8e8 NJ |
1179 | if (rc == -EOPNOTSUPP) { |
1180 | /* | |
1181 | * Old Windows versions or Netapp SMB server can return | |
1182 | * not supported error. Client should accept it. | |
1183 | */ | |
3175eb9b | 1184 | cifs_tcon_dbg(VFS, "Server does not support validate negotiate\n"); |
21078203 CIK |
1185 | rc = 0; |
1186 | goto out_free_inbuf; | |
969ae8e8 | 1187 | } else if (rc != 0) { |
a0a3036b JP |
1188 | cifs_tcon_dbg(VFS, "validate protocol negotiate failed: %d\n", |
1189 | rc); | |
2796d303 LL |
1190 | rc = -EIO; |
1191 | goto out_free_inbuf; | |
ff1c038a SF |
1192 | } |
1193 | ||
2796d303 LL |
1194 | rc = -EIO; |
1195 | if (rsplen != sizeof(*pneg_rsp)) { | |
a0a3036b JP |
1196 | cifs_tcon_dbg(VFS, "Invalid protocol negotiate response size: %d\n", |
1197 | rsplen); | |
7db0a6ef SF |
1198 | |
1199 | /* relax check since Mac returns max bufsize allowed on ioctl */ | |
2796d303 LL |
1200 | if (rsplen > CIFSMaxBufSize || rsplen < sizeof(*pneg_rsp)) |
1201 | goto out_free_rsp; | |
ff1c038a SF |
1202 | } |
1203 | ||
1204 | /* check validate negotiate info response matches what we got earlier */ | |
afe6f653 | 1205 | if (pneg_rsp->Dialect != cpu_to_le16(server->dialect)) |
ff1c038a SF |
1206 | goto vneg_out; |
1207 | ||
afe6f653 | 1208 | if (pneg_rsp->SecurityMode != cpu_to_le16(server->sec_mode)) |
ff1c038a SF |
1209 | goto vneg_out; |
1210 | ||
1211 | /* do not validate server guid because not saved at negprot time yet */ | |
1212 | ||
1213 | if ((le32_to_cpu(pneg_rsp->Capabilities) | SMB2_NT_FIND | | |
afe6f653 | 1214 | SMB2_LARGE_FILES) != server->capabilities) |
ff1c038a SF |
1215 | goto vneg_out; |
1216 | ||
1217 | /* validate negotiate successful */ | |
2796d303 | 1218 | rc = 0; |
ff1c038a | 1219 | cifs_dbg(FYI, "validate negotiate info successful\n"); |
2796d303 | 1220 | goto out_free_rsp; |
ff1c038a SF |
1221 | |
1222 | vneg_out: | |
3175eb9b | 1223 | cifs_tcon_dbg(VFS, "protocol revalidation - security settings mismatch\n"); |
2796d303 | 1224 | out_free_rsp: |
fe83bebc | 1225 | kfree(pneg_rsp); |
2796d303 LL |
1226 | out_free_inbuf: |
1227 | kfree(pneg_inbuf); | |
1228 | return rc; | |
ff1c038a SF |
1229 | } |
1230 | ||
ef65aaed SP |
1231 | enum securityEnum |
1232 | smb2_select_sectype(struct TCP_Server_Info *server, enum securityEnum requested) | |
1233 | { | |
1234 | switch (requested) { | |
1235 | case Kerberos: | |
1236 | case RawNTLMSSP: | |
1237 | return requested; | |
1238 | case NTLMv2: | |
1239 | return RawNTLMSSP; | |
1240 | case Unspecified: | |
1241 | if (server->sec_ntlmssp && | |
1242 | (global_secflags & CIFSSEC_MAY_NTLMSSP)) | |
1243 | return RawNTLMSSP; | |
1244 | if ((server->sec_kerberos || server->sec_mskerberos) && | |
1245 | (global_secflags & CIFSSEC_MAY_KRB5)) | |
1246 | return Kerberos; | |
df561f66 | 1247 | fallthrough; |
ef65aaed SP |
1248 | default: |
1249 | return Unspecified; | |
1250 | } | |
1251 | } | |
1252 | ||
3baf1a7b SP |
1253 | struct SMB2_sess_data { |
1254 | unsigned int xid; | |
1255 | struct cifs_ses *ses; | |
f486ef8e | 1256 | struct TCP_Server_Info *server; |
3baf1a7b SP |
1257 | struct nls_table *nls_cp; |
1258 | void (*func)(struct SMB2_sess_data *); | |
1259 | int result; | |
1260 | u64 previous_session; | |
1261 | ||
1262 | /* we will send the SMB in three pieces: | |
1263 | * a fixed length beginning part, an optional | |
1264 | * SPNEGO blob (which can be zero length), and a | |
1265 | * last part which will include the strings | |
1266 | * and rest of bcc area. This allows us to avoid | |
1267 | * a large buffer 17K allocation | |
1268 | */ | |
1269 | int buf0_type; | |
1270 | struct kvec iov[2]; | |
1271 | }; | |
1272 | ||
1273 | static int | |
1274 | SMB2_sess_alloc_buffer(struct SMB2_sess_data *sess_data) | |
1275 | { | |
1276 | int rc; | |
1277 | struct cifs_ses *ses = sess_data->ses; | |
f486ef8e | 1278 | struct TCP_Server_Info *server = sess_data->server; |
3baf1a7b | 1279 | struct smb2_sess_setup_req *req; |
88ea5cb7 | 1280 | unsigned int total_len; |
f486ef8e | 1281 | bool is_binding = false; |
3baf1a7b | 1282 | |
352d96f3 AA |
1283 | rc = smb2_plain_req_init(SMB2_SESSION_SETUP, NULL, server, |
1284 | (void **) &req, | |
1285 | &total_len); | |
3baf1a7b SP |
1286 | if (rc) |
1287 | return rc; | |
1288 | ||
f486ef8e SP |
1289 | spin_lock(&ses->chan_lock); |
1290 | is_binding = !CIFS_ALL_CHANS_NEED_RECONNECT(ses); | |
1291 | spin_unlock(&ses->chan_lock); | |
1292 | ||
1293 | if (is_binding) { | |
1294 | req->hdr.SessionId = cpu_to_le64(ses->Suid); | |
0d35e382 | 1295 | req->hdr.Flags |= SMB2_FLAGS_SIGNED; |
d70e9fa5 AA |
1296 | req->PreviousSessionId = 0; |
1297 | req->Flags = SMB2_SESSION_REQ_FLAG_BINDING; | |
f486ef8e | 1298 | cifs_dbg(FYI, "Binding to sess id: %llx\n", ses->Suid); |
d70e9fa5 AA |
1299 | } else { |
1300 | /* First session, not a reauthenticate */ | |
0d35e382 | 1301 | req->hdr.SessionId = 0; |
d70e9fa5 AA |
1302 | /* |
1303 | * if reconnect, we need to send previous sess id | |
1304 | * otherwise it is 0 | |
1305 | */ | |
d8d9de53 | 1306 | req->PreviousSessionId = cpu_to_le64(sess_data->previous_session); |
d70e9fa5 | 1307 | req->Flags = 0; /* MBZ */ |
f486ef8e SP |
1308 | cifs_dbg(FYI, "Fresh session. Previous: %llx\n", |
1309 | sess_data->previous_session); | |
d70e9fa5 | 1310 | } |
d409014e SF |
1311 | |
1312 | /* enough to enable echos and oplocks and one max size write */ | |
0d35e382 | 1313 | req->hdr.CreditRequest = cpu_to_le16(130); |
3baf1a7b SP |
1314 | |
1315 | /* only one of SMB2 signing flags may be set in SMB2 request */ | |
1316 | if (server->sign) | |
1317 | req->SecurityMode = SMB2_NEGOTIATE_SIGNING_REQUIRED; | |
1318 | else if (global_secflags & CIFSSEC_MAY_SIGN) /* one flag unlike MUST_ */ | |
1319 | req->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED; | |
1320 | else | |
1321 | req->SecurityMode = 0; | |
1322 | ||
8d33096a SF |
1323 | #ifdef CONFIG_CIFS_DFS_UPCALL |
1324 | req->Capabilities = cpu_to_le32(SMB2_GLOBAL_CAP_DFS); | |
1325 | #else | |
3baf1a7b | 1326 | req->Capabilities = 0; |
8d33096a SF |
1327 | #endif /* DFS_UPCALL */ |
1328 | ||
3baf1a7b SP |
1329 | req->Channel = 0; /* MBZ */ |
1330 | ||
1331 | sess_data->iov[0].iov_base = (char *)req; | |
88ea5cb7 RS |
1332 | /* 1 for pad */ |
1333 | sess_data->iov[0].iov_len = total_len - 1; | |
3baf1a7b SP |
1334 | /* |
1335 | * This variable will be used to clear the buffer | |
1336 | * allocated above in case of any error in the calling function. | |
1337 | */ | |
1338 | sess_data->buf0_type = CIFS_SMALL_BUFFER; | |
1339 | ||
1340 | return 0; | |
1341 | } | |
1342 | ||
1343 | static void | |
1344 | SMB2_sess_free_buffer(struct SMB2_sess_data *sess_data) | |
1345 | { | |
1346 | free_rsp_buf(sess_data->buf0_type, sess_data->iov[0].iov_base); | |
1347 | sess_data->buf0_type = CIFS_NO_BUFFER; | |
1348 | } | |
1349 | ||
1350 | static int | |
1351 | SMB2_sess_sendreceive(struct SMB2_sess_data *sess_data) | |
1352 | { | |
1353 | int rc; | |
40eff45b | 1354 | struct smb_rqst rqst; |
3baf1a7b | 1355 | struct smb2_sess_setup_req *req = sess_data->iov[0].iov_base; |
da502f7d | 1356 | struct kvec rsp_iov = { NULL, 0 }; |
3baf1a7b SP |
1357 | |
1358 | /* Testing shows that buffer offset must be at location of Buffer[0] */ | |
1359 | req->SecurityBufferOffset = | |
88ea5cb7 | 1360 | cpu_to_le16(sizeof(struct smb2_sess_setup_req) - 1 /* pad */); |
3baf1a7b SP |
1361 | req->SecurityBufferLength = cpu_to_le16(sess_data->iov[1].iov_len); |
1362 | ||
40eff45b RS |
1363 | memset(&rqst, 0, sizeof(struct smb_rqst)); |
1364 | rqst.rq_iov = sess_data->iov; | |
1365 | rqst.rq_nvec = 2; | |
3baf1a7b | 1366 | |
40eff45b RS |
1367 | /* BB add code to build os and lm fields */ |
1368 | rc = cifs_send_recv(sess_data->xid, sess_data->ses, | |
f486ef8e | 1369 | sess_data->server, |
40eff45b | 1370 | &rqst, |
88ea5cb7 | 1371 | &sess_data->buf0_type, |
0f56db83 | 1372 | CIFS_LOG_ERROR | CIFS_SESS_OP, &rsp_iov); |
da502f7d PS |
1373 | cifs_small_buf_release(sess_data->iov[0].iov_base); |
1374 | memcpy(&sess_data->iov[0], &rsp_iov, sizeof(struct kvec)); | |
3baf1a7b SP |
1375 | |
1376 | return rc; | |
1377 | } | |
1378 | ||
1379 | static int | |
1380 | SMB2_sess_establish_session(struct SMB2_sess_data *sess_data) | |
1381 | { | |
1382 | int rc = 0; | |
1383 | struct cifs_ses *ses = sess_data->ses; | |
f486ef8e | 1384 | struct TCP_Server_Info *server = sess_data->server; |
3baf1a7b | 1385 | |
cc391b69 | 1386 | cifs_server_lock(server); |
f6a6bf7c | 1387 | if (server->ops->generate_signingkey) { |
f486ef8e | 1388 | rc = server->ops->generate_signingkey(ses, server); |
3baf1a7b SP |
1389 | if (rc) { |
1390 | cifs_dbg(FYI, | |
1391 | "SMB3 session key generation failed\n"); | |
cc391b69 | 1392 | cifs_server_unlock(server); |
cabfb368 | 1393 | return rc; |
3baf1a7b SP |
1394 | } |
1395 | } | |
f6a6bf7c AA |
1396 | if (!server->session_estab) { |
1397 | server->sequence_number = 0x2; | |
1398 | server->session_estab = true; | |
3baf1a7b | 1399 | } |
cc391b69 | 1400 | cifs_server_unlock(server); |
3baf1a7b SP |
1401 | |
1402 | cifs_dbg(FYI, "SMB2/3 session established successfully\n"); | |
3baf1a7b SP |
1403 | return rc; |
1404 | } | |
1405 | ||
1406 | #ifdef CONFIG_CIFS_UPCALL | |
1407 | static void | |
1408 | SMB2_auth_kerberos(struct SMB2_sess_data *sess_data) | |
1409 | { | |
1410 | int rc; | |
1411 | struct cifs_ses *ses = sess_data->ses; | |
f486ef8e | 1412 | struct TCP_Server_Info *server = sess_data->server; |
3baf1a7b SP |
1413 | struct cifs_spnego_msg *msg; |
1414 | struct key *spnego_key = NULL; | |
1415 | struct smb2_sess_setup_rsp *rsp = NULL; | |
f486ef8e | 1416 | bool is_binding = false; |
3baf1a7b SP |
1417 | |
1418 | rc = SMB2_sess_alloc_buffer(sess_data); | |
1419 | if (rc) | |
1420 | goto out; | |
1421 | ||
f486ef8e | 1422 | spnego_key = cifs_get_spnego_key(ses, server); |
3baf1a7b SP |
1423 | if (IS_ERR(spnego_key)) { |
1424 | rc = PTR_ERR(spnego_key); | |
0a018944 SF |
1425 | if (rc == -ENOKEY) |
1426 | cifs_dbg(VFS, "Verify user has a krb5 ticket and keyutils is installed\n"); | |
3baf1a7b SP |
1427 | spnego_key = NULL; |
1428 | goto out; | |
1429 | } | |
1430 | ||
1431 | msg = spnego_key->payload.data[0]; | |
1432 | /* | |
1433 | * check version field to make sure that cifs.upcall is | |
1434 | * sending us a response in an expected form | |
1435 | */ | |
1436 | if (msg->version != CIFS_SPNEGO_UPCALL_VERSION) { | |
a0a3036b JP |
1437 | cifs_dbg(VFS, "bad cifs.upcall version. Expected %d got %d\n", |
1438 | CIFS_SPNEGO_UPCALL_VERSION, msg->version); | |
3baf1a7b SP |
1439 | rc = -EKEYREJECTED; |
1440 | goto out_put_spnego_key; | |
1441 | } | |
1442 | ||
f486ef8e SP |
1443 | spin_lock(&ses->chan_lock); |
1444 | is_binding = !CIFS_ALL_CHANS_NEED_RECONNECT(ses); | |
1445 | spin_unlock(&ses->chan_lock); | |
1446 | ||
d70e9fa5 | 1447 | /* keep session key if binding */ |
f486ef8e | 1448 | if (!is_binding) { |
d70e9fa5 AA |
1449 | ses->auth_key.response = kmemdup(msg->data, msg->sesskey_len, |
1450 | GFP_KERNEL); | |
1451 | if (!ses->auth_key.response) { | |
a0a3036b | 1452 | cifs_dbg(VFS, "Kerberos can't allocate (%u bytes) memory\n", |
d70e9fa5 AA |
1453 | msg->sesskey_len); |
1454 | rc = -ENOMEM; | |
1455 | goto out_put_spnego_key; | |
1456 | } | |
1457 | ses->auth_key.len = msg->sesskey_len; | |
3baf1a7b | 1458 | } |
3baf1a7b SP |
1459 | |
1460 | sess_data->iov[1].iov_base = msg->data + msg->sesskey_len; | |
1461 | sess_data->iov[1].iov_len = msg->secblob_len; | |
1462 | ||
1463 | rc = SMB2_sess_sendreceive(sess_data); | |
1464 | if (rc) | |
1465 | goto out_put_spnego_key; | |
1466 | ||
1467 | rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base; | |
d70e9fa5 | 1468 | /* keep session id and flags if binding */ |
f486ef8e | 1469 | if (!is_binding) { |
0d35e382 | 1470 | ses->Suid = le64_to_cpu(rsp->hdr.SessionId); |
d70e9fa5 AA |
1471 | ses->session_flags = le16_to_cpu(rsp->SessionFlags); |
1472 | } | |
3baf1a7b SP |
1473 | |
1474 | rc = SMB2_sess_establish_session(sess_data); | |
1475 | out_put_spnego_key: | |
1476 | key_invalidate(spnego_key); | |
1477 | key_put(spnego_key); | |
1478 | out: | |
1479 | sess_data->result = rc; | |
1480 | sess_data->func = NULL; | |
1481 | SMB2_sess_free_buffer(sess_data); | |
1482 | } | |
1483 | #else | |
1484 | static void | |
1485 | SMB2_auth_kerberos(struct SMB2_sess_data *sess_data) | |
1486 | { | |
1487 | cifs_dbg(VFS, "Kerberos negotiated but upcall support disabled!\n"); | |
1488 | sess_data->result = -EOPNOTSUPP; | |
1489 | sess_data->func = NULL; | |
1490 | } | |
1491 | #endif | |
1492 | ||
166cea4d SP |
1493 | static void |
1494 | SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data *sess_data); | |
1495 | ||
1496 | static void | |
1497 | SMB2_sess_auth_rawntlmssp_negotiate(struct SMB2_sess_data *sess_data) | |
5478f9ba | 1498 | { |
166cea4d SP |
1499 | int rc; |
1500 | struct cifs_ses *ses = sess_data->ses; | |
f486ef8e | 1501 | struct TCP_Server_Info *server = sess_data->server; |
5478f9ba | 1502 | struct smb2_sess_setup_rsp *rsp = NULL; |
49bd49f9 | 1503 | unsigned char *ntlmssp_blob = NULL; |
5478f9ba | 1504 | bool use_spnego = false; /* else use raw ntlmssp */ |
166cea4d | 1505 | u16 blob_length = 0; |
f486ef8e | 1506 | bool is_binding = false; |
d4e63bd6 | 1507 | |
5478f9ba PS |
1508 | /* |
1509 | * If memory allocation is successful, caller of this function | |
1510 | * frees it. | |
1511 | */ | |
1512 | ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL); | |
166cea4d SP |
1513 | if (!ses->ntlmssp) { |
1514 | rc = -ENOMEM; | |
1515 | goto out_err; | |
1516 | } | |
5c234aa5 | 1517 | ses->ntlmssp->sesskey_per_smbsess = true; |
5478f9ba | 1518 | |
166cea4d | 1519 | rc = SMB2_sess_alloc_buffer(sess_data); |
5478f9ba | 1520 | if (rc) |
166cea4d | 1521 | goto out_err; |
5478f9ba | 1522 | |
52d00533 | 1523 | rc = build_ntlmssp_smb3_negotiate_blob(&ntlmssp_blob, |
f486ef8e | 1524 | &blob_length, ses, server, |
49bd49f9 SP |
1525 | sess_data->nls_cp); |
1526 | if (rc) | |
1527 | goto out_err; | |
c2afb814 | 1528 | |
166cea4d SP |
1529 | if (use_spnego) { |
1530 | /* BB eventually need to add this */ | |
1531 | cifs_dbg(VFS, "spnego not supported for SMB2 yet\n"); | |
1532 | rc = -EOPNOTSUPP; | |
1533 | goto out; | |
166cea4d SP |
1534 | } |
1535 | sess_data->iov[1].iov_base = ntlmssp_blob; | |
1536 | sess_data->iov[1].iov_len = blob_length; | |
c2afb814 | 1537 | |
166cea4d SP |
1538 | rc = SMB2_sess_sendreceive(sess_data); |
1539 | rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base; | |
5478f9ba | 1540 | |
166cea4d SP |
1541 | /* If true, rc here is expected and not an error */ |
1542 | if (sess_data->buf0_type != CIFS_NO_BUFFER && | |
0d35e382 | 1543 | rsp->hdr.Status == STATUS_MORE_PROCESSING_REQUIRED) |
166cea4d | 1544 | rc = 0; |
38d77c50 | 1545 | |
166cea4d SP |
1546 | if (rc) |
1547 | goto out; | |
5478f9ba | 1548 | |
1fc6ad2f | 1549 | if (offsetof(struct smb2_sess_setup_rsp, Buffer) != |
166cea4d SP |
1550 | le16_to_cpu(rsp->SecurityBufferOffset)) { |
1551 | cifs_dbg(VFS, "Invalid security buffer offset %d\n", | |
1552 | le16_to_cpu(rsp->SecurityBufferOffset)); | |
5478f9ba | 1553 | rc = -EIO; |
166cea4d | 1554 | goto out; |
5478f9ba | 1555 | } |
166cea4d SP |
1556 | rc = decode_ntlmssp_challenge(rsp->Buffer, |
1557 | le16_to_cpu(rsp->SecurityBufferLength), ses); | |
1558 | if (rc) | |
1559 | goto out; | |
5478f9ba | 1560 | |
166cea4d | 1561 | cifs_dbg(FYI, "rawntlmssp session setup challenge phase\n"); |
5478f9ba | 1562 | |
f486ef8e SP |
1563 | spin_lock(&ses->chan_lock); |
1564 | is_binding = !CIFS_ALL_CHANS_NEED_RECONNECT(ses); | |
1565 | spin_unlock(&ses->chan_lock); | |
1566 | ||
d70e9fa5 | 1567 | /* keep existing ses id and flags if binding */ |
f486ef8e | 1568 | if (!is_binding) { |
0d35e382 | 1569 | ses->Suid = le64_to_cpu(rsp->hdr.SessionId); |
d70e9fa5 AA |
1570 | ses->session_flags = le16_to_cpu(rsp->SessionFlags); |
1571 | } | |
166cea4d SP |
1572 | |
1573 | out: | |
1574 | kfree(ntlmssp_blob); | |
1575 | SMB2_sess_free_buffer(sess_data); | |
1576 | if (!rc) { | |
1577 | sess_data->result = 0; | |
1578 | sess_data->func = SMB2_sess_auth_rawntlmssp_authenticate; | |
1579 | return; | |
1580 | } | |
1581 | out_err: | |
1582 | kfree(ses->ntlmssp); | |
1583 | ses->ntlmssp = NULL; | |
1584 | sess_data->result = rc; | |
1585 | sess_data->func = NULL; | |
1586 | } | |
5478f9ba | 1587 | |
166cea4d SP |
1588 | static void |
1589 | SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data *sess_data) | |
1590 | { | |
1591 | int rc; | |
1592 | struct cifs_ses *ses = sess_data->ses; | |
f486ef8e | 1593 | struct TCP_Server_Info *server = sess_data->server; |
166cea4d SP |
1594 | struct smb2_sess_setup_req *req; |
1595 | struct smb2_sess_setup_rsp *rsp = NULL; | |
1596 | unsigned char *ntlmssp_blob = NULL; | |
1597 | bool use_spnego = false; /* else use raw ntlmssp */ | |
1598 | u16 blob_length = 0; | |
f486ef8e | 1599 | bool is_binding = false; |
5478f9ba | 1600 | |
166cea4d SP |
1601 | rc = SMB2_sess_alloc_buffer(sess_data); |
1602 | if (rc) | |
1603 | goto out; | |
5478f9ba | 1604 | |
166cea4d | 1605 | req = (struct smb2_sess_setup_req *) sess_data->iov[0].iov_base; |
0d35e382 | 1606 | req->hdr.SessionId = cpu_to_le64(ses->Suid); |
166cea4d | 1607 | |
f486ef8e SP |
1608 | rc = build_ntlmssp_auth_blob(&ntlmssp_blob, &blob_length, |
1609 | ses, server, | |
1610 | sess_data->nls_cp); | |
166cea4d SP |
1611 | if (rc) { |
1612 | cifs_dbg(FYI, "build_ntlmssp_auth_blob failed %d\n", rc); | |
1613 | goto out; | |
5478f9ba PS |
1614 | } |
1615 | ||
166cea4d SP |
1616 | if (use_spnego) { |
1617 | /* BB eventually need to add this */ | |
1618 | cifs_dbg(VFS, "spnego not supported for SMB2 yet\n"); | |
1619 | rc = -EOPNOTSUPP; | |
1620 | goto out; | |
1621 | } | |
1622 | sess_data->iov[1].iov_base = ntlmssp_blob; | |
1623 | sess_data->iov[1].iov_len = blob_length; | |
5478f9ba | 1624 | |
166cea4d SP |
1625 | rc = SMB2_sess_sendreceive(sess_data); |
1626 | if (rc) | |
1627 | goto out; | |
1628 | ||
1629 | rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base; | |
1630 | ||
f486ef8e SP |
1631 | spin_lock(&ses->chan_lock); |
1632 | is_binding = !CIFS_ALL_CHANS_NEED_RECONNECT(ses); | |
1633 | spin_unlock(&ses->chan_lock); | |
1634 | ||
d70e9fa5 | 1635 | /* keep existing ses id and flags if binding */ |
f486ef8e | 1636 | if (!is_binding) { |
0d35e382 | 1637 | ses->Suid = le64_to_cpu(rsp->hdr.SessionId); |
d70e9fa5 AA |
1638 | ses->session_flags = le16_to_cpu(rsp->SessionFlags); |
1639 | } | |
5478f9ba | 1640 | |
166cea4d | 1641 | rc = SMB2_sess_establish_session(sess_data); |
f560cda9 RS |
1642 | #ifdef CONFIG_CIFS_DEBUG_DUMP_KEYS |
1643 | if (ses->server->dialect < SMB30_PROT_ID) { | |
1644 | cifs_dbg(VFS, "%s: dumping generated SMB2 session keys\n", __func__); | |
1645 | /* | |
1646 | * The session id is opaque in terms of endianness, so we can't | |
1647 | * print it as a long long. we dump it as we got it on the wire | |
1648 | */ | |
1649 | cifs_dbg(VFS, "Session Id %*ph\n", (int)sizeof(ses->Suid), | |
1650 | &ses->Suid); | |
1651 | cifs_dbg(VFS, "Session Key %*ph\n", | |
1652 | SMB2_NTLMV2_SESSKEY_SIZE, ses->auth_key.response); | |
1653 | cifs_dbg(VFS, "Signing Key %*ph\n", | |
1654 | SMB3_SIGN_KEY_SIZE, ses->auth_key.response); | |
1655 | } | |
1656 | #endif | |
166cea4d SP |
1657 | out: |
1658 | kfree(ntlmssp_blob); | |
1659 | SMB2_sess_free_buffer(sess_data); | |
1660 | kfree(ses->ntlmssp); | |
1661 | ses->ntlmssp = NULL; | |
1662 | sess_data->result = rc; | |
1663 | sess_data->func = NULL; | |
1664 | } | |
d4e63bd6 | 1665 | |
166cea4d | 1666 | static int |
f486ef8e | 1667 | SMB2_select_sec(struct SMB2_sess_data *sess_data) |
166cea4d | 1668 | { |
ef65aaed | 1669 | int type; |
f486ef8e SP |
1670 | struct cifs_ses *ses = sess_data->ses; |
1671 | struct TCP_Server_Info *server = sess_data->server; | |
ef65aaed | 1672 | |
f486ef8e | 1673 | type = smb2_select_sectype(server, ses->sectype); |
ef65aaed SP |
1674 | cifs_dbg(FYI, "sess setup type %d\n", type); |
1675 | if (type == Unspecified) { | |
a0a3036b | 1676 | cifs_dbg(VFS, "Unable to select appropriate authentication method!\n"); |
ef65aaed SP |
1677 | return -EINVAL; |
1678 | } | |
d4e63bd6 | 1679 | |
ef65aaed | 1680 | switch (type) { |
166cea4d SP |
1681 | case Kerberos: |
1682 | sess_data->func = SMB2_auth_kerberos; | |
1683 | break; | |
1684 | case RawNTLMSSP: | |
1685 | sess_data->func = SMB2_sess_auth_rawntlmssp_negotiate; | |
1686 | break; | |
1687 | default: | |
ef65aaed | 1688 | cifs_dbg(VFS, "secType %d not supported!\n", type); |
166cea4d | 1689 | return -EOPNOTSUPP; |
d4e63bd6 SP |
1690 | } |
1691 | ||
166cea4d SP |
1692 | return 0; |
1693 | } | |
1694 | ||
1695 | int | |
1696 | SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses, | |
f486ef8e | 1697 | struct TCP_Server_Info *server, |
166cea4d SP |
1698 | const struct nls_table *nls_cp) |
1699 | { | |
1700 | int rc = 0; | |
166cea4d SP |
1701 | struct SMB2_sess_data *sess_data; |
1702 | ||
1703 | cifs_dbg(FYI, "Session Setup\n"); | |
1704 | ||
1705 | if (!server) { | |
1706 | WARN(1, "%s: server is NULL!\n", __func__); | |
1707 | return -EIO; | |
d4e63bd6 | 1708 | } |
d4e63bd6 | 1709 | |
166cea4d SP |
1710 | sess_data = kzalloc(sizeof(struct SMB2_sess_data), GFP_KERNEL); |
1711 | if (!sess_data) | |
1712 | return -ENOMEM; | |
1713 | ||
166cea4d SP |
1714 | sess_data->xid = xid; |
1715 | sess_data->ses = ses; | |
f486ef8e | 1716 | sess_data->server = server; |
166cea4d SP |
1717 | sess_data->buf0_type = CIFS_NO_BUFFER; |
1718 | sess_data->nls_cp = (struct nls_table *) nls_cp; | |
b2adf22f | 1719 | sess_data->previous_session = ses->Suid; |
166cea4d | 1720 | |
f486ef8e SP |
1721 | rc = SMB2_select_sec(sess_data); |
1722 | if (rc) | |
1723 | goto out; | |
1724 | ||
8bd68c6e AA |
1725 | /* |
1726 | * Initialize the session hash with the server one. | |
1727 | */ | |
f6a6bf7c | 1728 | memcpy(ses->preauth_sha_hash, server->preauth_sha_hash, |
8bd68c6e | 1729 | SMB2_PREAUTH_HASH_SIZE); |
8bd68c6e | 1730 | |
166cea4d SP |
1731 | while (sess_data->func) |
1732 | sess_data->func(sess_data); | |
1733 | ||
c721c389 | 1734 | if ((ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST) && (ses->sign)) |
afe6f653 | 1735 | cifs_server_dbg(VFS, "signing requested but authenticated as guest\n"); |
3baf1a7b | 1736 | rc = sess_data->result; |
166cea4d | 1737 | out: |
3baf1a7b | 1738 | kfree(sess_data); |
5478f9ba PS |
1739 | return rc; |
1740 | } | |
1741 | ||
1742 | int | |
1743 | SMB2_logoff(const unsigned int xid, struct cifs_ses *ses) | |
1744 | { | |
40eff45b | 1745 | struct smb_rqst rqst; |
5478f9ba PS |
1746 | struct smb2_logoff_req *req; /* response is also trivial struct */ |
1747 | int rc = 0; | |
1748 | struct TCP_Server_Info *server; | |
7fb8986e | 1749 | int flags = 0; |
45305eda RS |
1750 | unsigned int total_len; |
1751 | struct kvec iov[1]; | |
1752 | struct kvec rsp_iov; | |
1753 | int resp_buf_type; | |
5478f9ba | 1754 | |
f96637be | 1755 | cifs_dbg(FYI, "disconnect session %p\n", ses); |
5478f9ba PS |
1756 | |
1757 | if (ses && (ses->server)) | |
1758 | server = ses->server; | |
1759 | else | |
1760 | return -EIO; | |
1761 | ||
eb4c7df6 | 1762 | /* no need to send SMB logoff if uid already closed due to reconnect */ |
d1a931ce SP |
1763 | spin_lock(&ses->chan_lock); |
1764 | if (CIFS_ALL_CHANS_NEED_RECONNECT(ses)) { | |
1765 | spin_unlock(&ses->chan_lock); | |
eb4c7df6 | 1766 | goto smb2_session_already_dead; |
d1a931ce SP |
1767 | } |
1768 | spin_unlock(&ses->chan_lock); | |
eb4c7df6 | 1769 | |
352d96f3 AA |
1770 | rc = smb2_plain_req_init(SMB2_LOGOFF, NULL, ses->server, |
1771 | (void **) &req, &total_len); | |
5478f9ba PS |
1772 | if (rc) |
1773 | return rc; | |
1774 | ||
1775 | /* since no tcon, smb2_init can not do this, so do here */ | |
0d35e382 | 1776 | req->hdr.SessionId = cpu_to_le64(ses->Suid); |
7fb8986e PS |
1777 | |
1778 | if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) | |
1779 | flags |= CIFS_TRANSFORM_REQ; | |
1780 | else if (server->sign) | |
0d35e382 | 1781 | req->hdr.Flags |= SMB2_FLAGS_SIGNED; |
45305eda | 1782 | |
392e1c5d | 1783 | flags |= CIFS_NO_RSP_BUF; |
45305eda RS |
1784 | |
1785 | iov[0].iov_base = (char *)req; | |
1786 | iov[0].iov_len = total_len; | |
5478f9ba | 1787 | |
40eff45b RS |
1788 | memset(&rqst, 0, sizeof(struct smb_rqst)); |
1789 | rqst.rq_iov = iov; | |
1790 | rqst.rq_nvec = 1; | |
1791 | ||
352d96f3 AA |
1792 | rc = cifs_send_recv(xid, ses, ses->server, |
1793 | &rqst, &resp_buf_type, flags, &rsp_iov); | |
da502f7d | 1794 | cifs_small_buf_release(req); |
5478f9ba PS |
1795 | /* |
1796 | * No tcon so can't do | |
1797 | * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]); | |
1798 | */ | |
eb4c7df6 SP |
1799 | |
1800 | smb2_session_already_dead: | |
5478f9ba PS |
1801 | return rc; |
1802 | } | |
faaf946a PS |
1803 | |
1804 | static inline void cifs_stats_fail_inc(struct cifs_tcon *tcon, uint16_t code) | |
1805 | { | |
d60622eb | 1806 | cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_failed[code]); |
faaf946a PS |
1807 | } |
1808 | ||
1809 | #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */) | |
1810 | ||
de9f68df SF |
1811 | /* These are similar values to what Windows uses */ |
1812 | static inline void init_copy_chunk_defaults(struct cifs_tcon *tcon) | |
1813 | { | |
1814 | tcon->max_chunks = 256; | |
1815 | tcon->max_bytes_chunk = 1048576; | |
1816 | tcon->max_bytes_copy = 16777216; | |
1817 | } | |
1818 | ||
faaf946a PS |
1819 | int |
1820 | SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree, | |
1821 | struct cifs_tcon *tcon, const struct nls_table *cp) | |
1822 | { | |
40eff45b | 1823 | struct smb_rqst rqst; |
faaf946a PS |
1824 | struct smb2_tree_connect_req *req; |
1825 | struct smb2_tree_connect_rsp *rsp = NULL; | |
1826 | struct kvec iov[2]; | |
db3b5474 | 1827 | struct kvec rsp_iov = { NULL, 0 }; |
faaf946a PS |
1828 | int rc = 0; |
1829 | int resp_buftype; | |
1830 | int unc_path_len; | |
faaf946a | 1831 | __le16 *unc_path = NULL; |
7fb8986e | 1832 | int flags = 0; |
661bb943 | 1833 | unsigned int total_len; |
352d96f3 AA |
1834 | struct TCP_Server_Info *server; |
1835 | ||
1836 | /* always use master channel */ | |
1837 | server = ses->server; | |
faaf946a | 1838 | |
f96637be | 1839 | cifs_dbg(FYI, "TCON\n"); |
faaf946a | 1840 | |
afe6f653 | 1841 | if (!server || !tree) |
faaf946a PS |
1842 | return -EIO; |
1843 | ||
faaf946a PS |
1844 | unc_path = kmalloc(MAX_SHARENAME_LENGTH * 2, GFP_KERNEL); |
1845 | if (unc_path == NULL) | |
1846 | return -ENOMEM; | |
1847 | ||
1848 | unc_path_len = cifs_strtoUTF16(unc_path, tree, strlen(tree), cp) + 1; | |
1849 | unc_path_len *= 2; | |
1850 | if (unc_path_len < 2) { | |
1851 | kfree(unc_path); | |
1852 | return -EINVAL; | |
1853 | } | |
1854 | ||
806a28ef | 1855 | /* SMB2 TREE_CONNECT request must be called with TreeId == 0 */ |
b327a717 | 1856 | tcon->tid = 0; |
fae8044c | 1857 | atomic_set(&tcon->num_remote_opens, 0); |
352d96f3 AA |
1858 | rc = smb2_plain_req_init(SMB2_TREE_CONNECT, tcon, server, |
1859 | (void **) &req, &total_len); | |
faaf946a PS |
1860 | if (rc) { |
1861 | kfree(unc_path); | |
1862 | return rc; | |
1863 | } | |
1864 | ||
5a77e75f | 1865 | if (smb3_encryption_required(tcon)) |
ae6f8dd4 | 1866 | flags |= CIFS_TRANSFORM_REQ; |
faaf946a PS |
1867 | |
1868 | iov[0].iov_base = (char *)req; | |
661bb943 RS |
1869 | /* 1 for pad */ |
1870 | iov[0].iov_len = total_len - 1; | |
faaf946a PS |
1871 | |
1872 | /* Testing shows that buffer offset must be at location of Buffer[0] */ | |
1873 | req->PathOffset = cpu_to_le16(sizeof(struct smb2_tree_connect_req) | |
661bb943 | 1874 | - 1 /* pad */); |
faaf946a PS |
1875 | req->PathLength = cpu_to_le16(unc_path_len - 2); |
1876 | iov[1].iov_base = unc_path; | |
1877 | iov[1].iov_len = unc_path_len; | |
1878 | ||
e71ab2aa RS |
1879 | /* |
1880 | * 3.11 tcon req must be signed if not encrypted. See MS-SMB2 3.2.4.1.1 | |
1881 | * unless it is guest or anonymous user. See MS-SMB2 3.2.5.3.1 | |
8c11a607 | 1882 | * (Samba servers don't always set the flag so also check if null user) |
e71ab2aa | 1883 | */ |
afe6f653 | 1884 | if ((server->dialect == SMB311_PROT_ID) && |
e71ab2aa | 1885 | !smb3_encryption_required(tcon) && |
8c11a607 SF |
1886 | !(ses->session_flags & |
1887 | (SMB2_SESSION_FLAG_IS_GUEST|SMB2_SESSION_FLAG_IS_NULL)) && | |
1888 | ((ses->user_name != NULL) || (ses->sectype == Kerberos))) | |
0d35e382 | 1889 | req->hdr.Flags |= SMB2_FLAGS_SIGNED; |
6188f28b | 1890 | |
40eff45b RS |
1891 | memset(&rqst, 0, sizeof(struct smb_rqst)); |
1892 | rqst.rq_iov = iov; | |
1893 | rqst.rq_nvec = 2; | |
1894 | ||
4fe75c4e | 1895 | /* Need 64 for max size write so ask for more in case not there yet */ |
0d35e382 | 1896 | req->hdr.CreditRequest = cpu_to_le16(64); |
4fe75c4e | 1897 | |
352d96f3 AA |
1898 | rc = cifs_send_recv(xid, ses, server, |
1899 | &rqst, &resp_buftype, flags, &rsp_iov); | |
da502f7d PS |
1900 | cifs_small_buf_release(req); |
1901 | rsp = (struct smb2_tree_connect_rsp *)rsp_iov.iov_base; | |
f8af49dd | 1902 | trace_smb3_tcon(xid, tcon->tid, ses->Suid, tree, rc); |
bac35395 | 1903 | if ((rc != 0) || (rsp == NULL)) { |
3559134e SF |
1904 | cifs_stats_fail_inc(tcon, SMB2_TREE_CONNECT_HE); |
1905 | tcon->need_reconnect = true; | |
faaf946a PS |
1906 | goto tcon_error_exit; |
1907 | } | |
1908 | ||
cd123007 CJ |
1909 | switch (rsp->ShareType) { |
1910 | case SMB2_SHARE_TYPE_DISK: | |
f96637be | 1911 | cifs_dbg(FYI, "connection to disk share\n"); |
cd123007 CJ |
1912 | break; |
1913 | case SMB2_SHARE_TYPE_PIPE: | |
b327a717 | 1914 | tcon->pipe = true; |
f96637be | 1915 | cifs_dbg(FYI, "connection to pipe share\n"); |
cd123007 CJ |
1916 | break; |
1917 | case SMB2_SHARE_TYPE_PRINT: | |
b327a717 | 1918 | tcon->print = true; |
f96637be | 1919 | cifs_dbg(FYI, "connection to printer\n"); |
cd123007 CJ |
1920 | break; |
1921 | default: | |
afe6f653 | 1922 | cifs_server_dbg(VFS, "unknown share type %d\n", rsp->ShareType); |
faaf946a PS |
1923 | rc = -EOPNOTSUPP; |
1924 | goto tcon_error_exit; | |
1925 | } | |
1926 | ||
1927 | tcon->share_flags = le32_to_cpu(rsp->ShareFlags); | |
769ee6a4 | 1928 | tcon->capabilities = rsp->Capabilities; /* we keep caps little endian */ |
faaf946a | 1929 | tcon->maximal_access = le32_to_cpu(rsp->MaximalAccess); |
0d35e382 | 1930 | tcon->tid = le32_to_cpu(rsp->hdr.Id.SyncId.TreeId); |
13609a8b | 1931 | strscpy(tcon->treeName, tree, sizeof(tcon->treeName)); |
faaf946a PS |
1932 | |
1933 | if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) && | |
1934 | ((tcon->share_flags & SHI1005_FLAGS_DFS) == 0)) | |
3175eb9b | 1935 | cifs_tcon_dbg(VFS, "DFS capability contradicts DFS flag\n"); |
ae6f8dd4 PS |
1936 | |
1937 | if (tcon->seal && | |
afe6f653 | 1938 | !(server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION)) |
3175eb9b | 1939 | cifs_tcon_dbg(VFS, "Encryption is requested but not supported\n"); |
ae6f8dd4 | 1940 | |
de9f68df | 1941 | init_copy_chunk_defaults(tcon); |
afe6f653 RS |
1942 | if (server->ops->validate_negotiate) |
1943 | rc = server->ops->validate_negotiate(xid, tcon); | |
faaf946a | 1944 | tcon_exit: |
f8af49dd | 1945 | |
faaf946a PS |
1946 | free_rsp_buf(resp_buftype, rsp); |
1947 | kfree(unc_path); | |
1948 | return rc; | |
1949 | ||
1950 | tcon_error_exit: | |
0d35e382 | 1951 | if (rsp && rsp->hdr.Status == STATUS_BAD_NETWORK_NAME) |
3175eb9b | 1952 | cifs_tcon_dbg(VFS, "BAD_NETWORK_NAME: %s\n", tree); |
faaf946a PS |
1953 | goto tcon_exit; |
1954 | } | |
1955 | ||
1956 | int | |
1957 | SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon) | |
1958 | { | |
40eff45b | 1959 | struct smb_rqst rqst; |
faaf946a PS |
1960 | struct smb2_tree_disconnect_req *req; /* response is trivial */ |
1961 | int rc = 0; | |
faaf946a | 1962 | struct cifs_ses *ses = tcon->ses; |
7fb8986e | 1963 | int flags = 0; |
4eecf4cf RS |
1964 | unsigned int total_len; |
1965 | struct kvec iov[1]; | |
1966 | struct kvec rsp_iov; | |
1967 | int resp_buf_type; | |
faaf946a | 1968 | |
f96637be | 1969 | cifs_dbg(FYI, "Tree Disconnect\n"); |
faaf946a | 1970 | |
68a6afa7 | 1971 | if (!ses || !(ses->server)) |
faaf946a PS |
1972 | return -EIO; |
1973 | ||
d1a931ce SP |
1974 | spin_lock(&ses->chan_lock); |
1975 | if ((tcon->need_reconnect) || | |
1976 | (CIFS_ALL_CHANS_NEED_RECONNECT(tcon->ses))) { | |
1977 | spin_unlock(&ses->chan_lock); | |
faaf946a | 1978 | return 0; |
d1a931ce SP |
1979 | } |
1980 | spin_unlock(&ses->chan_lock); | |
faaf946a | 1981 | |
dcb45fd7 | 1982 | invalidate_all_cached_dirs(tcon); |
72e73c78 | 1983 | |
352d96f3 AA |
1984 | rc = smb2_plain_req_init(SMB2_TREE_DISCONNECT, tcon, ses->server, |
1985 | (void **) &req, | |
1986 | &total_len); | |
faaf946a PS |
1987 | if (rc) |
1988 | return rc; | |
1989 | ||
5a77e75f | 1990 | if (smb3_encryption_required(tcon)) |
7fb8986e PS |
1991 | flags |= CIFS_TRANSFORM_REQ; |
1992 | ||
392e1c5d | 1993 | flags |= CIFS_NO_RSP_BUF; |
4eecf4cf RS |
1994 | |
1995 | iov[0].iov_base = (char *)req; | |
1996 | iov[0].iov_len = total_len; | |
1997 | ||
40eff45b RS |
1998 | memset(&rqst, 0, sizeof(struct smb_rqst)); |
1999 | rqst.rq_iov = iov; | |
2000 | rqst.rq_nvec = 1; | |
2001 | ||
352d96f3 AA |
2002 | rc = cifs_send_recv(xid, ses, ses->server, |
2003 | &rqst, &resp_buf_type, flags, &rsp_iov); | |
da502f7d | 2004 | cifs_small_buf_release(req); |
faaf946a PS |
2005 | if (rc) |
2006 | cifs_stats_fail_inc(tcon, SMB2_TREE_DISCONNECT_HE); | |
2007 | ||
2008 | return rc; | |
2009 | } | |
2503a0db | 2010 | |
b8c32dbb | 2011 | |
63eb3def PS |
2012 | static struct create_durable * |
2013 | create_durable_buf(void) | |
2014 | { | |
2015 | struct create_durable *buf; | |
2016 | ||
2017 | buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL); | |
2018 | if (!buf) | |
2019 | return NULL; | |
2020 | ||
2021 | buf->ccontext.DataOffset = cpu_to_le16(offsetof | |
9cbc0b73 | 2022 | (struct create_durable, Data)); |
63eb3def PS |
2023 | buf->ccontext.DataLength = cpu_to_le32(16); |
2024 | buf->ccontext.NameOffset = cpu_to_le16(offsetof | |
2025 | (struct create_durable, Name)); | |
2026 | buf->ccontext.NameLength = cpu_to_le16(4); | |
12197a7f | 2027 | /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DHnQ" */ |
63eb3def PS |
2028 | buf->Name[0] = 'D'; |
2029 | buf->Name[1] = 'H'; | |
2030 | buf->Name[2] = 'n'; | |
2031 | buf->Name[3] = 'Q'; | |
2032 | return buf; | |
2033 | } | |
2034 | ||
9cbc0b73 PS |
2035 | static struct create_durable * |
2036 | create_reconnect_durable_buf(struct cifs_fid *fid) | |
2037 | { | |
2038 | struct create_durable *buf; | |
2039 | ||
2040 | buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL); | |
2041 | if (!buf) | |
2042 | return NULL; | |
2043 | ||
2044 | buf->ccontext.DataOffset = cpu_to_le16(offsetof | |
2045 | (struct create_durable, Data)); | |
2046 | buf->ccontext.DataLength = cpu_to_le32(16); | |
2047 | buf->ccontext.NameOffset = cpu_to_le16(offsetof | |
2048 | (struct create_durable, Name)); | |
2049 | buf->ccontext.NameLength = cpu_to_le16(4); | |
2050 | buf->Data.Fid.PersistentFileId = fid->persistent_fid; | |
2051 | buf->Data.Fid.VolatileFileId = fid->volatile_fid; | |
12197a7f | 2052 | /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT is "DHnC" */ |
9cbc0b73 PS |
2053 | buf->Name[0] = 'D'; |
2054 | buf->Name[1] = 'H'; | |
2055 | buf->Name[2] = 'n'; | |
2056 | buf->Name[3] = 'C'; | |
2057 | return buf; | |
2058 | } | |
2059 | ||
89a5bfa3 SF |
2060 | static void |
2061 | parse_query_id_ctxt(struct create_context *cc, struct smb2_file_all_info *buf) | |
2062 | { | |
2063 | struct create_on_disk_id *pdisk_id = (struct create_on_disk_id *)cc; | |
2064 | ||
2065 | cifs_dbg(FYI, "parse query id context 0x%llx 0x%llx\n", | |
2066 | pdisk_id->DiskFileId, pdisk_id->VolumeId); | |
2067 | buf->IndexNumber = pdisk_id->DiskFileId; | |
2068 | } | |
2069 | ||
ab3459d8 | 2070 | static void |
69dda305 AA |
2071 | parse_posix_ctxt(struct create_context *cc, struct smb2_file_all_info *info, |
2072 | struct create_posix_rsp *posix) | |
ab3459d8 | 2073 | { |
69dda305 AA |
2074 | int sid_len; |
2075 | u8 *beg = (u8 *)cc + le16_to_cpu(cc->DataOffset); | |
2076 | u8 *end = beg + le32_to_cpu(cc->DataLength); | |
2077 | u8 *sid; | |
ab3459d8 | 2078 | |
69dda305 AA |
2079 | memset(posix, 0, sizeof(*posix)); |
2080 | ||
2081 | posix->nlink = le32_to_cpu(*(__le32 *)(beg + 0)); | |
2082 | posix->reparse_tag = le32_to_cpu(*(__le32 *)(beg + 4)); | |
2083 | posix->mode = le32_to_cpu(*(__le32 *)(beg + 8)); | |
2084 | ||
2085 | sid = beg + 12; | |
2086 | sid_len = posix_info_sid_size(sid, end); | |
2087 | if (sid_len < 0) { | |
2088 | cifs_dbg(VFS, "bad owner sid in posix create response\n"); | |
2089 | return; | |
2090 | } | |
2091 | memcpy(&posix->owner, sid, sid_len); | |
2092 | ||
2093 | sid = sid + sid_len; | |
2094 | sid_len = posix_info_sid_size(sid, end); | |
2095 | if (sid_len < 0) { | |
2096 | cifs_dbg(VFS, "bad group sid in posix create response\n"); | |
2097 | return; | |
2098 | } | |
2099 | memcpy(&posix->group, sid, sid_len); | |
2e8af978 | 2100 | |
69dda305 AA |
2101 | cifs_dbg(FYI, "nlink=%d mode=%o reparse_tag=%x\n", |
2102 | posix->nlink, posix->mode, posix->reparse_tag); | |
ab3459d8 SF |
2103 | } |
2104 | ||
89a5bfa3 SF |
2105 | void |
2106 | smb2_parse_contexts(struct TCP_Server_Info *server, | |
69dda305 AA |
2107 | struct smb2_create_rsp *rsp, |
2108 | unsigned int *epoch, char *lease_key, __u8 *oplock, | |
2109 | struct smb2_file_all_info *buf, | |
2110 | struct create_posix_rsp *posix) | |
b8c32dbb PS |
2111 | { |
2112 | char *data_offset; | |
b5c7cde3 | 2113 | struct create_context *cc; |
deb7deff JM |
2114 | unsigned int next; |
2115 | unsigned int remaining; | |
fd554396 | 2116 | char *name; |
3ece60e3 CIK |
2117 | static const char smb3_create_tag_posix[] = { |
2118 | 0x93, 0xAD, 0x25, 0x50, 0x9C, | |
2119 | 0xB4, 0x11, 0xE7, 0xB4, 0x23, 0x83, | |
2120 | 0xDE, 0x96, 0x8B, 0xCD, 0x7C | |
2121 | }; | |
b8c32dbb | 2122 | |
89a5bfa3 | 2123 | *oplock = 0; |
1fc6ad2f | 2124 | data_offset = (char *)rsp + le32_to_cpu(rsp->CreateContextsOffset); |
deb7deff | 2125 | remaining = le32_to_cpu(rsp->CreateContextsLength); |
b5c7cde3 | 2126 | cc = (struct create_context *)data_offset; |
89a5bfa3 SF |
2127 | |
2128 | /* Initialize inode number to 0 in case no valid data in qfid context */ | |
2129 | if (buf) | |
2130 | buf->IndexNumber = 0; | |
2131 | ||
deb7deff | 2132 | while (remaining >= sizeof(struct create_context)) { |
b5c7cde3 | 2133 | name = le16_to_cpu(cc->NameOffset) + (char *)cc; |
deb7deff | 2134 | if (le16_to_cpu(cc->NameLength) == 4 && |
89a5bfa3 SF |
2135 | strncmp(name, SMB2_CREATE_REQUEST_LEASE, 4) == 0) |
2136 | *oplock = server->ops->parse_lease_buf(cc, epoch, | |
2137 | lease_key); | |
2138 | else if (buf && (le16_to_cpu(cc->NameLength) == 4) && | |
2139 | strncmp(name, SMB2_CREATE_QUERY_ON_DISK_ID, 4) == 0) | |
2140 | parse_query_id_ctxt(cc, buf); | |
ab3459d8 | 2141 | else if ((le16_to_cpu(cc->NameLength) == 16)) { |
69dda305 AA |
2142 | if (posix && |
2143 | memcmp(name, smb3_create_tag_posix, 16) == 0) | |
2144 | parse_posix_ctxt(cc, buf, posix); | |
ab3459d8 SF |
2145 | } |
2146 | /* else { | |
2147 | cifs_dbg(FYI, "Context not matched with len %d\n", | |
2148 | le16_to_cpu(cc->NameLength)); | |
2149 | cifs_dump_mem("Cctxt name: ", name, 4); | |
2150 | } */ | |
deb7deff JM |
2151 | |
2152 | next = le32_to_cpu(cc->Next); | |
2153 | if (!next) | |
2154 | break; | |
2155 | remaining -= next; | |
2156 | cc = (struct create_context *)((char *)cc + next); | |
2157 | } | |
b8c32dbb | 2158 | |
89a5bfa3 SF |
2159 | if (rsp->OplockLevel != SMB2_OPLOCK_LEVEL_LEASE) |
2160 | *oplock = rsp->OplockLevel; | |
2161 | ||
2162 | return; | |
b8c32dbb PS |
2163 | } |
2164 | ||
d22cbfec | 2165 | static int |
a41a28bd | 2166 | add_lease_context(struct TCP_Server_Info *server, struct kvec *iov, |
729c0c9d | 2167 | unsigned int *num_iovec, u8 *lease_key, __u8 *oplock) |
d22cbfec PS |
2168 | { |
2169 | struct smb2_create_req *req = iov[0].iov_base; | |
2170 | unsigned int num = *num_iovec; | |
2171 | ||
729c0c9d | 2172 | iov[num].iov_base = server->ops->create_lease_buf(lease_key, *oplock); |
d22cbfec PS |
2173 | if (iov[num].iov_base == NULL) |
2174 | return -ENOMEM; | |
a41a28bd | 2175 | iov[num].iov_len = server->vals->create_lease_size; |
d22cbfec PS |
2176 | req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_LEASE; |
2177 | if (!req->CreateContextsOffset) | |
2178 | req->CreateContextsOffset = cpu_to_le32( | |
4f33bc35 | 2179 | sizeof(struct smb2_create_req) + |
d22cbfec | 2180 | iov[num - 1].iov_len); |
a41a28bd PS |
2181 | le32_add_cpu(&req->CreateContextsLength, |
2182 | server->vals->create_lease_size); | |
d22cbfec PS |
2183 | *num_iovec = num + 1; |
2184 | return 0; | |
2185 | } | |
2186 | ||
b56eae4d | 2187 | static struct create_durable_v2 * |
ca567eb2 | 2188 | create_durable_v2_buf(struct cifs_open_parms *oparms) |
b56eae4d | 2189 | { |
ca567eb2 | 2190 | struct cifs_fid *pfid = oparms->fid; |
b56eae4d SF |
2191 | struct create_durable_v2 *buf; |
2192 | ||
2193 | buf = kzalloc(sizeof(struct create_durable_v2), GFP_KERNEL); | |
2194 | if (!buf) | |
2195 | return NULL; | |
2196 | ||
2197 | buf->ccontext.DataOffset = cpu_to_le16(offsetof | |
2198 | (struct create_durable_v2, dcontext)); | |
2199 | buf->ccontext.DataLength = cpu_to_le32(sizeof(struct durable_context_v2)); | |
2200 | buf->ccontext.NameOffset = cpu_to_le16(offsetof | |
2201 | (struct create_durable_v2, Name)); | |
2202 | buf->ccontext.NameLength = cpu_to_le16(4); | |
2203 | ||
ca567eb2 SF |
2204 | /* |
2205 | * NB: Handle timeout defaults to 0, which allows server to choose | |
2206 | * (most servers default to 120 seconds) and most clients default to 0. | |
2207 | * This can be overridden at mount ("handletimeout=") if the user wants | |
2208 | * a different persistent (or resilient) handle timeout for all opens | |
2209 | * opens on a particular SMB3 mount. | |
2210 | */ | |
2211 | buf->dcontext.Timeout = cpu_to_le32(oparms->tcon->handle_timeout); | |
b56eae4d | 2212 | buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT); |
fa70b87c | 2213 | generate_random_uuid(buf->dcontext.CreateGuid); |
b56eae4d SF |
2214 | memcpy(pfid->create_guid, buf->dcontext.CreateGuid, 16); |
2215 | ||
2216 | /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DH2Q" */ | |
2217 | buf->Name[0] = 'D'; | |
2218 | buf->Name[1] = 'H'; | |
2219 | buf->Name[2] = '2'; | |
2220 | buf->Name[3] = 'Q'; | |
2221 | return buf; | |
2222 | } | |
2223 | ||
2224 | static struct create_durable_handle_reconnect_v2 * | |
2225 | create_reconnect_durable_v2_buf(struct cifs_fid *fid) | |
2226 | { | |
2227 | struct create_durable_handle_reconnect_v2 *buf; | |
2228 | ||
2229 | buf = kzalloc(sizeof(struct create_durable_handle_reconnect_v2), | |
2230 | GFP_KERNEL); | |
2231 | if (!buf) | |
2232 | return NULL; | |
2233 | ||
2234 | buf->ccontext.DataOffset = | |
2235 | cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2, | |
2236 | dcontext)); | |
2237 | buf->ccontext.DataLength = | |
2238 | cpu_to_le32(sizeof(struct durable_reconnect_context_v2)); | |
2239 | buf->ccontext.NameOffset = | |
2240 | cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2, | |
2241 | Name)); | |
2242 | buf->ccontext.NameLength = cpu_to_le16(4); | |
2243 | ||
2244 | buf->dcontext.Fid.PersistentFileId = fid->persistent_fid; | |
2245 | buf->dcontext.Fid.VolatileFileId = fid->volatile_fid; | |
2246 | buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT); | |
2247 | memcpy(buf->dcontext.CreateGuid, fid->create_guid, 16); | |
2248 | ||
2249 | /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2 is "DH2C" */ | |
2250 | buf->Name[0] = 'D'; | |
2251 | buf->Name[1] = 'H'; | |
2252 | buf->Name[2] = '2'; | |
2253 | buf->Name[3] = 'C'; | |
2254 | return buf; | |
2255 | } | |
2256 | ||
63eb3def | 2257 | static int |
b56eae4d SF |
2258 | add_durable_v2_context(struct kvec *iov, unsigned int *num_iovec, |
2259 | struct cifs_open_parms *oparms) | |
2260 | { | |
2261 | struct smb2_create_req *req = iov[0].iov_base; | |
2262 | unsigned int num = *num_iovec; | |
2263 | ||
ca567eb2 | 2264 | iov[num].iov_base = create_durable_v2_buf(oparms); |
b56eae4d SF |
2265 | if (iov[num].iov_base == NULL) |
2266 | return -ENOMEM; | |
2267 | iov[num].iov_len = sizeof(struct create_durable_v2); | |
2268 | if (!req->CreateContextsOffset) | |
2269 | req->CreateContextsOffset = | |
4f33bc35 | 2270 | cpu_to_le32(sizeof(struct smb2_create_req) + |
b56eae4d SF |
2271 | iov[1].iov_len); |
2272 | le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable_v2)); | |
b56eae4d SF |
2273 | *num_iovec = num + 1; |
2274 | return 0; | |
2275 | } | |
2276 | ||
2277 | static int | |
2278 | add_durable_reconnect_v2_context(struct kvec *iov, unsigned int *num_iovec, | |
9cbc0b73 | 2279 | struct cifs_open_parms *oparms) |
63eb3def PS |
2280 | { |
2281 | struct smb2_create_req *req = iov[0].iov_base; | |
2282 | unsigned int num = *num_iovec; | |
2283 | ||
b56eae4d SF |
2284 | /* indicate that we don't need to relock the file */ |
2285 | oparms->reconnect = false; | |
2286 | ||
2287 | iov[num].iov_base = create_reconnect_durable_v2_buf(oparms->fid); | |
2288 | if (iov[num].iov_base == NULL) | |
2289 | return -ENOMEM; | |
2290 | iov[num].iov_len = sizeof(struct create_durable_handle_reconnect_v2); | |
2291 | if (!req->CreateContextsOffset) | |
2292 | req->CreateContextsOffset = | |
4f33bc35 | 2293 | cpu_to_le32(sizeof(struct smb2_create_req) + |
b56eae4d SF |
2294 | iov[1].iov_len); |
2295 | le32_add_cpu(&req->CreateContextsLength, | |
2296 | sizeof(struct create_durable_handle_reconnect_v2)); | |
b56eae4d SF |
2297 | *num_iovec = num + 1; |
2298 | return 0; | |
2299 | } | |
2300 | ||
2301 | static int | |
2302 | add_durable_context(struct kvec *iov, unsigned int *num_iovec, | |
2303 | struct cifs_open_parms *oparms, bool use_persistent) | |
2304 | { | |
2305 | struct smb2_create_req *req = iov[0].iov_base; | |
2306 | unsigned int num = *num_iovec; | |
2307 | ||
2308 | if (use_persistent) { | |
2309 | if (oparms->reconnect) | |
2310 | return add_durable_reconnect_v2_context(iov, num_iovec, | |
2311 | oparms); | |
2312 | else | |
2313 | return add_durable_v2_context(iov, num_iovec, oparms); | |
2314 | } | |
2315 | ||
9cbc0b73 PS |
2316 | if (oparms->reconnect) { |
2317 | iov[num].iov_base = create_reconnect_durable_buf(oparms->fid); | |
2318 | /* indicate that we don't need to relock the file */ | |
2319 | oparms->reconnect = false; | |
2320 | } else | |
2321 | iov[num].iov_base = create_durable_buf(); | |
63eb3def PS |
2322 | if (iov[num].iov_base == NULL) |
2323 | return -ENOMEM; | |
2324 | iov[num].iov_len = sizeof(struct create_durable); | |
2325 | if (!req->CreateContextsOffset) | |
2326 | req->CreateContextsOffset = | |
4f33bc35 | 2327 | cpu_to_le32(sizeof(struct smb2_create_req) + |
63eb3def | 2328 | iov[1].iov_len); |
31f92e9a | 2329 | le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable)); |
63eb3def PS |
2330 | *num_iovec = num + 1; |
2331 | return 0; | |
2332 | } | |
2333 | ||
cdeaf9d0 SF |
2334 | /* See MS-SMB2 2.2.13.2.7 */ |
2335 | static struct crt_twarp_ctxt * | |
2336 | create_twarp_buf(__u64 timewarp) | |
2337 | { | |
2338 | struct crt_twarp_ctxt *buf; | |
2339 | ||
2340 | buf = kzalloc(sizeof(struct crt_twarp_ctxt), GFP_KERNEL); | |
2341 | if (!buf) | |
2342 | return NULL; | |
2343 | ||
2344 | buf->ccontext.DataOffset = cpu_to_le16(offsetof | |
2345 | (struct crt_twarp_ctxt, Timestamp)); | |
2346 | buf->ccontext.DataLength = cpu_to_le32(8); | |
2347 | buf->ccontext.NameOffset = cpu_to_le16(offsetof | |
2348 | (struct crt_twarp_ctxt, Name)); | |
2349 | buf->ccontext.NameLength = cpu_to_le16(4); | |
2350 | /* SMB2_CREATE_TIMEWARP_TOKEN is "TWrp" */ | |
2351 | buf->Name[0] = 'T'; | |
2352 | buf->Name[1] = 'W'; | |
2353 | buf->Name[2] = 'r'; | |
2354 | buf->Name[3] = 'p'; | |
2355 | buf->Timestamp = cpu_to_le64(timewarp); | |
2356 | return buf; | |
2357 | } | |
2358 | ||
2359 | /* See MS-SMB2 2.2.13.2.7 */ | |
2360 | static int | |
2361 | add_twarp_context(struct kvec *iov, unsigned int *num_iovec, __u64 timewarp) | |
2362 | { | |
2363 | struct smb2_create_req *req = iov[0].iov_base; | |
2364 | unsigned int num = *num_iovec; | |
2365 | ||
2366 | iov[num].iov_base = create_twarp_buf(timewarp); | |
2367 | if (iov[num].iov_base == NULL) | |
2368 | return -ENOMEM; | |
2369 | iov[num].iov_len = sizeof(struct crt_twarp_ctxt); | |
2370 | if (!req->CreateContextsOffset) | |
2371 | req->CreateContextsOffset = cpu_to_le32( | |
2372 | sizeof(struct smb2_create_req) + | |
2373 | iov[num - 1].iov_len); | |
2374 | le32_add_cpu(&req->CreateContextsLength, sizeof(struct crt_twarp_ctxt)); | |
2375 | *num_iovec = num + 1; | |
2376 | return 0; | |
2377 | } | |
2378 | ||
975221ec SF |
2379 | /* See See http://technet.microsoft.com/en-us/library/hh509017(v=ws.10).aspx */ |
2380 | static void setup_owner_group_sids(char *buf) | |
2381 | { | |
2382 | struct owner_group_sids *sids = (struct owner_group_sids *)buf; | |
2383 | ||
2384 | /* Populate the user ownership fields S-1-5-88-1 */ | |
2385 | sids->owner.Revision = 1; | |
2386 | sids->owner.NumAuth = 3; | |
2387 | sids->owner.Authority[5] = 5; | |
2388 | sids->owner.SubAuthorities[0] = cpu_to_le32(88); | |
2389 | sids->owner.SubAuthorities[1] = cpu_to_le32(1); | |
2390 | sids->owner.SubAuthorities[2] = cpu_to_le32(current_fsuid().val); | |
2391 | ||
2392 | /* Populate the group ownership fields S-1-5-88-2 */ | |
2393 | sids->group.Revision = 1; | |
2394 | sids->group.NumAuth = 3; | |
2395 | sids->group.Authority[5] = 5; | |
2396 | sids->group.SubAuthorities[0] = cpu_to_le32(88); | |
2397 | sids->group.SubAuthorities[1] = cpu_to_le32(2); | |
2398 | sids->group.SubAuthorities[2] = cpu_to_le32(current_fsgid().val); | |
a7a519a4 SF |
2399 | |
2400 | 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 |
2401 | } |
2402 | ||
fdef665b SF |
2403 | /* See MS-SMB2 2.2.13.2.2 and MS-DTYP 2.4.6 */ |
2404 | static struct crt_sd_ctxt * | |
975221ec | 2405 | create_sd_buf(umode_t mode, bool set_owner, unsigned int *len) |
fdef665b SF |
2406 | { |
2407 | struct crt_sd_ctxt *buf; | |
ea64370b RS |
2408 | __u8 *ptr, *aclptr; |
2409 | unsigned int acelen, acl_size, ace_count; | |
975221ec SF |
2410 | unsigned int owner_offset = 0; |
2411 | unsigned int group_offset = 0; | |
ea64370b | 2412 | struct smb3_acl acl; |
975221ec | 2413 | |
ea64370b | 2414 | *len = roundup(sizeof(struct crt_sd_ctxt) + (sizeof(struct cifs_ace) * 4), 8); |
975221ec SF |
2415 | |
2416 | if (set_owner) { | |
975221ec SF |
2417 | /* sizeof(struct owner_group_sids) is already multiple of 8 so no need to round */ |
2418 | *len += sizeof(struct owner_group_sids); | |
2419 | } | |
fdef665b | 2420 | |
fdef665b SF |
2421 | buf = kzalloc(*len, GFP_KERNEL); |
2422 | if (buf == NULL) | |
2423 | return buf; | |
2424 | ||
ea64370b | 2425 | ptr = (__u8 *)&buf[1]; |
975221ec | 2426 | if (set_owner) { |
ea64370b RS |
2427 | /* offset fields are from beginning of security descriptor not of create context */ |
2428 | owner_offset = ptr - (__u8 *)&buf->sd; | |
975221ec | 2429 | buf->sd.OffsetOwner = cpu_to_le32(owner_offset); |
ea64370b | 2430 | group_offset = owner_offset + offsetof(struct owner_group_sids, group); |
975221ec | 2431 | buf->sd.OffsetGroup = cpu_to_le32(group_offset); |
ea64370b RS |
2432 | |
2433 | setup_owner_group_sids(ptr); | |
2434 | ptr += sizeof(struct owner_group_sids); | |
975221ec SF |
2435 | } else { |
2436 | buf->sd.OffsetOwner = 0; | |
2437 | buf->sd.OffsetGroup = 0; | |
2438 | } | |
2439 | ||
ea64370b | 2440 | buf->ccontext.DataOffset = cpu_to_le16(offsetof(struct crt_sd_ctxt, sd)); |
975221ec | 2441 | buf->ccontext.NameOffset = cpu_to_le16(offsetof(struct crt_sd_ctxt, Name)); |
fdef665b SF |
2442 | buf->ccontext.NameLength = cpu_to_le16(4); |
2443 | /* SMB2_CREATE_SD_BUFFER_TOKEN is "SecD" */ | |
2444 | buf->Name[0] = 'S'; | |
2445 | buf->Name[1] = 'e'; | |
2446 | buf->Name[2] = 'c'; | |
2447 | buf->Name[3] = 'D'; | |
2448 | buf->sd.Revision = 1; /* Must be one see MS-DTYP 2.4.6 */ | |
ea64370b | 2449 | |
fdef665b SF |
2450 | /* |
2451 | * ACL is "self relative" ie ACL is stored in contiguous block of memory | |
2452 | * and "DP" ie the DACL is present | |
2453 | */ | |
2454 | buf->sd.Control = cpu_to_le16(ACL_CONTROL_SR | ACL_CONTROL_DP); | |
2455 | ||
2456 | /* offset owner, group and Sbz1 and SACL are all zero */ | |
ea64370b RS |
2457 | buf->sd.OffsetDacl = cpu_to_le32(ptr - (__u8 *)&buf->sd); |
2458 | /* Ship the ACL for now. we will copy it into buf later. */ | |
2459 | aclptr = ptr; | |
b06d893e | 2460 | ptr += sizeof(struct smb3_acl); |
fdef665b SF |
2461 | |
2462 | /* create one ACE to hold the mode embedded in reserved special SID */ | |
ea64370b RS |
2463 | acelen = setup_special_mode_ACE((struct cifs_ace *)ptr, (__u64)mode); |
2464 | ptr += acelen; | |
2465 | acl_size = acelen + sizeof(struct smb3_acl); | |
2466 | ace_count = 1; | |
975221ec SF |
2467 | |
2468 | if (set_owner) { | |
2469 | /* we do not need to reallocate buffer to add the two more ACEs. plenty of space */ | |
ea64370b RS |
2470 | acelen = setup_special_user_owner_ACE((struct cifs_ace *)ptr); |
2471 | ptr += acelen; | |
2472 | acl_size += acelen; | |
2473 | ace_count += 1; | |
2474 | } | |
975221ec | 2475 | |
643fbcee | 2476 | /* and one more ACE to allow access for authenticated users */ |
ea64370b RS |
2477 | acelen = setup_authusers_ACE((struct cifs_ace *)ptr); |
2478 | ptr += acelen; | |
2479 | acl_size += acelen; | |
2480 | ace_count += 1; | |
2481 | ||
2482 | acl.AclRevision = ACL_REVISION; /* See 2.4.4.1 of MS-DTYP */ | |
2483 | acl.AclSize = cpu_to_le16(acl_size); | |
2484 | acl.AceCount = cpu_to_le16(ace_count); | |
b06d893e | 2485 | memcpy(aclptr, &acl, sizeof(struct smb3_acl)); |
ea64370b RS |
2486 | |
2487 | buf->ccontext.DataLength = cpu_to_le32(ptr - (__u8 *)&buf->sd); | |
7d3fc017 | 2488 | *len = roundup(ptr - (__u8 *)buf, 8); |
975221ec | 2489 | |
fdef665b SF |
2490 | return buf; |
2491 | } | |
2492 | ||
2493 | static int | |
975221ec | 2494 | add_sd_context(struct kvec *iov, unsigned int *num_iovec, umode_t mode, bool set_owner) |
fdef665b SF |
2495 | { |
2496 | struct smb2_create_req *req = iov[0].iov_base; | |
2497 | unsigned int num = *num_iovec; | |
2498 | unsigned int len = 0; | |
2499 | ||
975221ec | 2500 | iov[num].iov_base = create_sd_buf(mode, set_owner, &len); |
fdef665b SF |
2501 | if (iov[num].iov_base == NULL) |
2502 | return -ENOMEM; | |
2503 | iov[num].iov_len = len; | |
2504 | if (!req->CreateContextsOffset) | |
2505 | req->CreateContextsOffset = cpu_to_le32( | |
2506 | sizeof(struct smb2_create_req) + | |
2507 | iov[num - 1].iov_len); | |
2508 | le32_add_cpu(&req->CreateContextsLength, len); | |
2509 | *num_iovec = num + 1; | |
2510 | return 0; | |
2511 | } | |
2512 | ||
ff2a09e9 SF |
2513 | static struct crt_query_id_ctxt * |
2514 | create_query_id_buf(void) | |
2515 | { | |
2516 | struct crt_query_id_ctxt *buf; | |
2517 | ||
2518 | buf = kzalloc(sizeof(struct crt_query_id_ctxt), GFP_KERNEL); | |
2519 | if (!buf) | |
2520 | return NULL; | |
2521 | ||
2522 | buf->ccontext.DataOffset = cpu_to_le16(0); | |
2523 | buf->ccontext.DataLength = cpu_to_le32(0); | |
2524 | buf->ccontext.NameOffset = cpu_to_le16(offsetof | |
2525 | (struct crt_query_id_ctxt, Name)); | |
2526 | buf->ccontext.NameLength = cpu_to_le16(4); | |
2527 | /* SMB2_CREATE_QUERY_ON_DISK_ID is "QFid" */ | |
2528 | buf->Name[0] = 'Q'; | |
2529 | buf->Name[1] = 'F'; | |
2530 | buf->Name[2] = 'i'; | |
2531 | buf->Name[3] = 'd'; | |
2532 | return buf; | |
2533 | } | |
2534 | ||
2535 | /* See MS-SMB2 2.2.13.2.9 */ | |
2536 | static int | |
2537 | add_query_id_context(struct kvec *iov, unsigned int *num_iovec) | |
2538 | { | |
2539 | struct smb2_create_req *req = iov[0].iov_base; | |
2540 | unsigned int num = *num_iovec; | |
2541 | ||
2542 | iov[num].iov_base = create_query_id_buf(); | |
2543 | if (iov[num].iov_base == NULL) | |
2544 | return -ENOMEM; | |
2545 | iov[num].iov_len = sizeof(struct crt_query_id_ctxt); | |
2546 | if (!req->CreateContextsOffset) | |
2547 | req->CreateContextsOffset = cpu_to_le32( | |
2548 | sizeof(struct smb2_create_req) + | |
2549 | iov[num - 1].iov_len); | |
2550 | le32_add_cpu(&req->CreateContextsLength, sizeof(struct crt_query_id_ctxt)); | |
2551 | *num_iovec = num + 1; | |
2552 | return 0; | |
2553 | } | |
2554 | ||
f0712928 AA |
2555 | static int |
2556 | alloc_path_with_tree_prefix(__le16 **out_path, int *out_size, int *out_len, | |
2557 | const char *treename, const __le16 *path) | |
2558 | { | |
2559 | int treename_len, path_len; | |
2560 | struct nls_table *cp; | |
2561 | const __le16 sep[] = {cpu_to_le16('\\'), cpu_to_le16(0x0000)}; | |
2562 | ||
2563 | /* | |
2564 | * skip leading "\\" | |
2565 | */ | |
2566 | treename_len = strlen(treename); | |
2567 | if (treename_len < 2 || !(treename[0] == '\\' && treename[1] == '\\')) | |
2568 | return -EINVAL; | |
2569 | ||
2570 | treename += 2; | |
2571 | treename_len -= 2; | |
2572 | ||
2573 | path_len = UniStrnlen((wchar_t *)path, PATH_MAX); | |
2574 | ||
a1d2eb51 PA |
2575 | /* make room for one path separator only if @path isn't empty */ |
2576 | *out_len = treename_len + (path[0] ? 1 : 0) + path_len; | |
f0712928 AA |
2577 | |
2578 | /* | |
a1d2eb51 PA |
2579 | * final path needs to be 8-byte aligned as specified in |
2580 | * MS-SMB2 2.2.13 SMB2 CREATE Request. | |
f0712928 | 2581 | */ |
a1d2eb51 PA |
2582 | *out_size = roundup(*out_len * sizeof(__le16), 8); |
2583 | *out_path = kzalloc(*out_size + sizeof(__le16) /* null */, GFP_KERNEL); | |
f0712928 AA |
2584 | if (!*out_path) |
2585 | return -ENOMEM; | |
2586 | ||
2587 | cp = load_nls_default(); | |
2588 | cifs_strtoUTF16(*out_path, treename, treename_len, cp); | |
7eacba3b EK |
2589 | |
2590 | /* Do not append the separator if the path is empty */ | |
2591 | if (path[0] != cpu_to_le16(0x0000)) { | |
2592 | UniStrcat(*out_path, sep); | |
2593 | UniStrcat(*out_path, path); | |
2594 | } | |
2595 | ||
f0712928 AA |
2596 | unload_nls(cp); |
2597 | ||
2598 | return 0; | |
2599 | } | |
2600 | ||
bea851b8 SF |
2601 | int smb311_posix_mkdir(const unsigned int xid, struct inode *inode, |
2602 | umode_t mode, struct cifs_tcon *tcon, | |
2603 | const char *full_path, | |
2604 | struct cifs_sb_info *cifs_sb) | |
2605 | { | |
2606 | struct smb_rqst rqst; | |
2607 | struct smb2_create_req *req; | |
256b4c3f | 2608 | struct smb2_create_rsp *rsp = NULL; |
bea851b8 SF |
2609 | struct cifs_ses *ses = tcon->ses; |
2610 | struct kvec iov[3]; /* make sure at least one for each open context */ | |
2611 | struct kvec rsp_iov = {NULL, 0}; | |
2612 | int resp_buftype; | |
2613 | int uni_path_len; | |
2614 | __le16 *copy_path = NULL; | |
2615 | int copy_size; | |
2616 | int rc = 0; | |
2617 | unsigned int n_iov = 2; | |
2618 | __u32 file_attributes = 0; | |
2619 | char *pc_buf = NULL; | |
2620 | int flags = 0; | |
2621 | unsigned int total_len; | |
256b4c3f | 2622 | __le16 *utf16_path = NULL; |
352d96f3 | 2623 | struct TCP_Server_Info *server = cifs_pick_channel(ses); |
bea851b8 SF |
2624 | |
2625 | cifs_dbg(FYI, "mkdir\n"); | |
2626 | ||
256b4c3f AA |
2627 | /* resource #1: path allocation */ |
2628 | utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb); | |
2629 | if (!utf16_path) | |
2630 | return -ENOMEM; | |
2631 | ||
352d96f3 | 2632 | if (!ses || !server) { |
256b4c3f AA |
2633 | rc = -EIO; |
2634 | goto err_free_path; | |
2635 | } | |
bea851b8 | 2636 | |
256b4c3f | 2637 | /* resource #2: request */ |
352d96f3 AA |
2638 | rc = smb2_plain_req_init(SMB2_CREATE, tcon, server, |
2639 | (void **) &req, &total_len); | |
bea851b8 | 2640 | if (rc) |
256b4c3f AA |
2641 | goto err_free_path; |
2642 | ||
bea851b8 SF |
2643 | |
2644 | if (smb3_encryption_required(tcon)) | |
2645 | flags |= CIFS_TRANSFORM_REQ; | |
2646 | ||
bea851b8 SF |
2647 | req->ImpersonationLevel = IL_IMPERSONATION; |
2648 | req->DesiredAccess = cpu_to_le32(FILE_WRITE_ATTRIBUTES); | |
2649 | /* File attributes ignored on open (used in create though) */ | |
2650 | req->FileAttributes = cpu_to_le32(file_attributes); | |
2651 | req->ShareAccess = FILE_SHARE_ALL_LE; | |
2652 | req->CreateDisposition = cpu_to_le32(FILE_CREATE); | |
2653 | req->CreateOptions = cpu_to_le32(CREATE_NOT_FILE); | |
2654 | ||
2655 | iov[0].iov_base = (char *)req; | |
2656 | /* -1 since last byte is buf[0] which is sent below (path) */ | |
2657 | iov[0].iov_len = total_len - 1; | |
2658 | ||
2659 | req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req)); | |
2660 | ||
2661 | /* [MS-SMB2] 2.2.13 NameOffset: | |
2662 | * If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of | |
2663 | * the SMB2 header, the file name includes a prefix that will | |
2664 | * be processed during DFS name normalization as specified in | |
2665 | * section 3.3.5.9. Otherwise, the file name is relative to | |
2666 | * the share that is identified by the TreeId in the SMB2 | |
2667 | * header. | |
2668 | */ | |
2669 | if (tcon->share_flags & SHI1005_FLAGS_DFS) { | |
2670 | int name_len; | |
2671 | ||
0d35e382 | 2672 | req->hdr.Flags |= SMB2_FLAGS_DFS_OPERATIONS; |
bea851b8 SF |
2673 | rc = alloc_path_with_tree_prefix(©_path, ©_size, |
2674 | &name_len, | |
256b4c3f AA |
2675 | tcon->treeName, utf16_path); |
2676 | if (rc) | |
2677 | goto err_free_req; | |
2678 | ||
bea851b8 SF |
2679 | req->NameLength = cpu_to_le16(name_len * 2); |
2680 | uni_path_len = copy_size; | |
256b4c3f AA |
2681 | /* free before overwriting resource */ |
2682 | kfree(utf16_path); | |
2683 | utf16_path = copy_path; | |
bea851b8 | 2684 | } else { |
256b4c3f | 2685 | uni_path_len = (2 * UniStrnlen((wchar_t *)utf16_path, PATH_MAX)) + 2; |
bea851b8 SF |
2686 | /* MUST set path len (NameLength) to 0 opening root of share */ |
2687 | req->NameLength = cpu_to_le16(uni_path_len - 2); | |
2688 | if (uni_path_len % 8 != 0) { | |
2689 | copy_size = roundup(uni_path_len, 8); | |
2690 | copy_path = kzalloc(copy_size, GFP_KERNEL); | |
2691 | if (!copy_path) { | |
256b4c3f AA |
2692 | rc = -ENOMEM; |
2693 | goto err_free_req; | |
bea851b8 | 2694 | } |
256b4c3f | 2695 | memcpy((char *)copy_path, (const char *)utf16_path, |
bea851b8 SF |
2696 | uni_path_len); |
2697 | uni_path_len = copy_size; | |
256b4c3f AA |
2698 | /* free before overwriting resource */ |
2699 | kfree(utf16_path); | |
2700 | utf16_path = copy_path; | |
bea851b8 SF |
2701 | } |
2702 | } | |
2703 | ||
2704 | iov[1].iov_len = uni_path_len; | |
256b4c3f | 2705 | iov[1].iov_base = utf16_path; |
bea851b8 SF |
2706 | req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_NONE; |
2707 | ||
2708 | if (tcon->posix_extensions) { | |
256b4c3f | 2709 | /* resource #3: posix buf */ |
bea851b8 | 2710 | rc = add_posix_context(iov, &n_iov, mode); |
256b4c3f AA |
2711 | if (rc) |
2712 | goto err_free_req; | |
bea851b8 SF |
2713 | pc_buf = iov[n_iov-1].iov_base; |
2714 | } | |
2715 | ||
2716 | ||
2717 | memset(&rqst, 0, sizeof(struct smb_rqst)); | |
2718 | rqst.rq_iov = iov; | |
2719 | rqst.rq_nvec = n_iov; | |
2720 | ||
d2f15428 | 2721 | /* no need to inc num_remote_opens because we close it just below */ |
efe2e9f3 SF |
2722 | trace_smb3_posix_mkdir_enter(xid, tcon->tid, ses->Suid, CREATE_NOT_FILE, |
2723 | FILE_WRITE_ATTRIBUTES); | |
256b4c3f | 2724 | /* resource #4: response buffer */ |
352d96f3 AA |
2725 | rc = cifs_send_recv(xid, ses, server, |
2726 | &rqst, &resp_buftype, flags, &rsp_iov); | |
256b4c3f | 2727 | if (rc) { |
bea851b8 SF |
2728 | cifs_stats_fail_inc(tcon, SMB2_CREATE_HE); |
2729 | trace_smb3_posix_mkdir_err(xid, tcon->tid, ses->Suid, | |
256b4c3f AA |
2730 | CREATE_NOT_FILE, |
2731 | FILE_WRITE_ATTRIBUTES, rc); | |
2732 | goto err_free_rsp_buf; | |
2733 | } | |
2734 | ||
ca780da5 SF |
2735 | /* |
2736 | * Although unlikely to be possible for rsp to be null and rc not set, | |
2737 | * adding check below is slightly safer long term (and quiets Coverity | |
2738 | * warning) | |
2739 | */ | |
256b4c3f | 2740 | rsp = (struct smb2_create_rsp *)rsp_iov.iov_base; |
ca780da5 SF |
2741 | if (rsp == NULL) { |
2742 | rc = -EIO; | |
2743 | kfree(pc_buf); | |
2744 | goto err_free_req; | |
2745 | } | |
2746 | ||
351a59da PA |
2747 | trace_smb3_posix_mkdir_done(xid, rsp->PersistentFileId, tcon->tid, ses->Suid, |
2748 | CREATE_NOT_FILE, FILE_WRITE_ATTRIBUTES); | |
bea851b8 | 2749 | |
351a59da | 2750 | SMB2_close(xid, tcon, rsp->PersistentFileId, rsp->VolatileFileId); |
bea851b8 SF |
2751 | |
2752 | /* Eventually save off posix specific response info and timestaps */ | |
2753 | ||
256b4c3f | 2754 | err_free_rsp_buf: |
bea851b8 | 2755 | free_rsp_buf(resp_buftype, rsp); |
256b4c3f AA |
2756 | kfree(pc_buf); |
2757 | err_free_req: | |
2758 | cifs_small_buf_release(req); | |
2759 | err_free_path: | |
2760 | kfree(utf16_path); | |
bea851b8 | 2761 | return rc; |
bea851b8 | 2762 | } |
bea851b8 | 2763 | |
2503a0db | 2764 | int |
352d96f3 AA |
2765 | SMB2_open_init(struct cifs_tcon *tcon, struct TCP_Server_Info *server, |
2766 | struct smb_rqst *rqst, __u8 *oplock, | |
1eb9fb52 | 2767 | struct cifs_open_parms *oparms, __le16 *path) |
2503a0db PS |
2768 | { |
2769 | struct smb2_create_req *req; | |
da502f7d | 2770 | unsigned int n_iov = 2; |
ca81983f | 2771 | __u32 file_attributes = 0; |
1eb9fb52 RS |
2772 | int copy_size; |
2773 | int uni_path_len; | |
4f33bc35 | 2774 | unsigned int total_len; |
1eb9fb52 RS |
2775 | struct kvec *iov = rqst->rq_iov; |
2776 | __le16 *copy_path; | |
2777 | int rc; | |
2503a0db | 2778 | |
352d96f3 AA |
2779 | rc = smb2_plain_req_init(SMB2_CREATE, tcon, server, |
2780 | (void **) &req, &total_len); | |
2503a0db PS |
2781 | if (rc) |
2782 | return rc; | |
2783 | ||
1eb9fb52 RS |
2784 | iov[0].iov_base = (char *)req; |
2785 | /* -1 since last byte is buf[0] which is sent below (path) */ | |
2786 | iov[0].iov_len = total_len - 1; | |
7fb8986e | 2787 | |
064f6047 | 2788 | if (oparms->create_options & CREATE_OPTION_READONLY) |
ca81983f | 2789 | file_attributes |= ATTR_READONLY; |
db8b631d SF |
2790 | if (oparms->create_options & CREATE_OPTION_SPECIAL) |
2791 | file_attributes |= ATTR_SYSTEM; | |
ca81983f | 2792 | |
2503a0db | 2793 | req->ImpersonationLevel = IL_IMPERSONATION; |
064f6047 | 2794 | req->DesiredAccess = cpu_to_le32(oparms->desired_access); |
2503a0db PS |
2795 | /* File attributes ignored on open (used in create though) */ |
2796 | req->FileAttributes = cpu_to_le32(file_attributes); | |
2797 | req->ShareAccess = FILE_SHARE_ALL_LE; | |
c3ca78e2 | 2798 | |
064f6047 PS |
2799 | req->CreateDisposition = cpu_to_le32(oparms->disposition); |
2800 | req->CreateOptions = cpu_to_le32(oparms->create_options & CREATE_OPTIONS_MASK); | |
4f33bc35 | 2801 | req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req)); |
f0712928 AA |
2802 | |
2803 | /* [MS-SMB2] 2.2.13 NameOffset: | |
2804 | * If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of | |
2805 | * the SMB2 header, the file name includes a prefix that will | |
2806 | * be processed during DFS name normalization as specified in | |
2807 | * section 3.3.5.9. Otherwise, the file name is relative to | |
2808 | * the share that is identified by the TreeId in the SMB2 | |
2809 | * header. | |
2810 | */ | |
2811 | if (tcon->share_flags & SHI1005_FLAGS_DFS) { | |
2812 | int name_len; | |
2813 | ||
0d35e382 | 2814 | req->hdr.Flags |= SMB2_FLAGS_DFS_OPERATIONS; |
f0712928 AA |
2815 | rc = alloc_path_with_tree_prefix(©_path, ©_size, |
2816 | &name_len, | |
2817 | tcon->treeName, path); | |
1eb9fb52 | 2818 | if (rc) |
f0712928 AA |
2819 | return rc; |
2820 | req->NameLength = cpu_to_le16(name_len * 2); | |
59aa3718 PS |
2821 | uni_path_len = copy_size; |
2822 | path = copy_path; | |
f0712928 AA |
2823 | } else { |
2824 | uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2; | |
2825 | /* MUST set path len (NameLength) to 0 opening root of share */ | |
2826 | req->NameLength = cpu_to_le16(uni_path_len - 2); | |
1eb9fb52 RS |
2827 | copy_size = uni_path_len; |
2828 | if (copy_size % 8 != 0) | |
2829 | copy_size = roundup(copy_size, 8); | |
2830 | copy_path = kzalloc(copy_size, GFP_KERNEL); | |
2831 | if (!copy_path) | |
2832 | return -ENOMEM; | |
2833 | memcpy((char *)copy_path, (const char *)path, | |
2834 | uni_path_len); | |
2835 | uni_path_len = copy_size; | |
2836 | path = copy_path; | |
2503a0db PS |
2837 | } |
2838 | ||
59aa3718 PS |
2839 | iov[1].iov_len = uni_path_len; |
2840 | iov[1].iov_base = path; | |
59aa3718 | 2841 | |
3e7a02d4 | 2842 | if ((!server->oplocks) || (tcon->no_lease)) |
b8c32dbb PS |
2843 | *oplock = SMB2_OPLOCK_LEVEL_NONE; |
2844 | ||
a41a28bd | 2845 | if (!(server->capabilities & SMB2_GLOBAL_CAP_LEASING) || |
b8c32dbb PS |
2846 | *oplock == SMB2_OPLOCK_LEVEL_NONE) |
2847 | req->RequestedOplockLevel = *oplock; | |
f8015683 SF |
2848 | else if (!(server->capabilities & SMB2_GLOBAL_CAP_DIRECTORY_LEASING) && |
2849 | (oparms->create_options & CREATE_NOT_FILE)) | |
2850 | req->RequestedOplockLevel = *oplock; /* no srv lease support */ | |
b8c32dbb | 2851 | else { |
729c0c9d SB |
2852 | rc = add_lease_context(server, iov, &n_iov, |
2853 | oparms->fid->lease_key, oplock); | |
1eb9fb52 | 2854 | if (rc) |
d22cbfec | 2855 | return rc; |
b8c32dbb PS |
2856 | } |
2857 | ||
63eb3def PS |
2858 | if (*oplock == SMB2_OPLOCK_LEVEL_BATCH) { |
2859 | /* need to set Next field of lease context if we request it */ | |
a41a28bd | 2860 | if (server->capabilities & SMB2_GLOBAL_CAP_LEASING) { |
63eb3def | 2861 | struct create_context *ccontext = |
da502f7d | 2862 | (struct create_context *)iov[n_iov-1].iov_base; |
1c46943f | 2863 | ccontext->Next = |
a41a28bd | 2864 | cpu_to_le32(server->vals->create_lease_size); |
63eb3def | 2865 | } |
b56eae4d | 2866 | |
da502f7d | 2867 | rc = add_durable_context(iov, &n_iov, oparms, |
b56eae4d | 2868 | tcon->use_persistent); |
1eb9fb52 | 2869 | if (rc) |
63eb3def | 2870 | return rc; |
63eb3def PS |
2871 | } |
2872 | ||
ce558b0e SF |
2873 | if (tcon->posix_extensions) { |
2874 | if (n_iov > 2) { | |
2875 | struct create_context *ccontext = | |
2876 | (struct create_context *)iov[n_iov-1].iov_base; | |
2877 | ccontext->Next = | |
2878 | cpu_to_le32(iov[n_iov-1].iov_len); | |
2879 | } | |
2880 | ||
2881 | rc = add_posix_context(iov, &n_iov, oparms->mode); | |
1eb9fb52 | 2882 | if (rc) |
ce558b0e | 2883 | return rc; |
ce558b0e | 2884 | } |
ce558b0e | 2885 | |
cdeaf9d0 SF |
2886 | if (tcon->snapshot_time) { |
2887 | cifs_dbg(FYI, "adding snapshot context\n"); | |
2888 | if (n_iov > 2) { | |
2889 | struct create_context *ccontext = | |
2890 | (struct create_context *)iov[n_iov-1].iov_base; | |
2891 | ccontext->Next = | |
2892 | cpu_to_le32(iov[n_iov-1].iov_len); | |
2893 | } | |
2894 | ||
2895 | rc = add_twarp_context(iov, &n_iov, tcon->snapshot_time); | |
2896 | if (rc) | |
2897 | return rc; | |
2898 | } | |
2899 | ||
975221ec SF |
2900 | if ((oparms->disposition != FILE_OPEN) && (oparms->cifs_sb)) { |
2901 | bool set_mode; | |
2902 | bool set_owner; | |
2903 | ||
2904 | if ((oparms->cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID) && | |
2905 | (oparms->mode != ACL_NO_MODE)) | |
2906 | set_mode = true; | |
2907 | else { | |
2908 | set_mode = false; | |
2909 | oparms->mode = ACL_NO_MODE; | |
c3ca78e2 SF |
2910 | } |
2911 | ||
975221ec SF |
2912 | if (oparms->cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UID_FROM_ACL) |
2913 | set_owner = true; | |
2914 | else | |
2915 | set_owner = false; | |
2916 | ||
2917 | if (set_owner | set_mode) { | |
2918 | if (n_iov > 2) { | |
2919 | struct create_context *ccontext = | |
2920 | (struct create_context *)iov[n_iov-1].iov_base; | |
2921 | ccontext->Next = cpu_to_le32(iov[n_iov-1].iov_len); | |
2922 | } | |
2923 | ||
2924 | cifs_dbg(FYI, "add sd with mode 0x%x\n", oparms->mode); | |
2925 | rc = add_sd_context(iov, &n_iov, oparms->mode, set_owner); | |
2926 | if (rc) | |
2927 | return rc; | |
2928 | } | |
c3ca78e2 SF |
2929 | } |
2930 | ||
ff2a09e9 SF |
2931 | if (n_iov > 2) { |
2932 | struct create_context *ccontext = | |
2933 | (struct create_context *)iov[n_iov-1].iov_base; | |
2934 | ccontext->Next = cpu_to_le32(iov[n_iov-1].iov_len); | |
2935 | } | |
2936 | add_query_id_context(iov, &n_iov); | |
cdeaf9d0 | 2937 | |
1eb9fb52 RS |
2938 | rqst->rq_nvec = n_iov; |
2939 | return 0; | |
2940 | } | |
2941 | ||
2942 | /* rq_iov[0] is the request and is released by cifs_small_buf_release(). | |
2943 | * All other vectors are freed by kfree(). | |
2944 | */ | |
2945 | void | |
2946 | SMB2_open_free(struct smb_rqst *rqst) | |
2947 | { | |
2948 | int i; | |
2949 | ||
32a1fb36 RS |
2950 | if (rqst && rqst->rq_iov) { |
2951 | cifs_small_buf_release(rqst->rq_iov[0].iov_base); | |
2952 | for (i = 1; i < rqst->rq_nvec; i++) | |
2953 | if (rqst->rq_iov[i].iov_base != smb2_padding) | |
2954 | kfree(rqst->rq_iov[i].iov_base); | |
2955 | } | |
1eb9fb52 RS |
2956 | } |
2957 | ||
2958 | int | |
2959 | SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path, | |
2960 | __u8 *oplock, struct smb2_file_all_info *buf, | |
69dda305 | 2961 | struct create_posix_rsp *posix, |
1eb9fb52 RS |
2962 | struct kvec *err_iov, int *buftype) |
2963 | { | |
2964 | struct smb_rqst rqst; | |
2965 | struct smb2_create_rsp *rsp = NULL; | |
1eb9fb52 RS |
2966 | struct cifs_tcon *tcon = oparms->tcon; |
2967 | struct cifs_ses *ses = tcon->ses; | |
352d96f3 | 2968 | struct TCP_Server_Info *server = cifs_pick_channel(ses); |
4d8dfafc | 2969 | struct kvec iov[SMB2_CREATE_IOV_SIZE]; |
1eb9fb52 | 2970 | struct kvec rsp_iov = {NULL, 0}; |
ef2298a0 | 2971 | int resp_buftype = CIFS_NO_BUFFER; |
1eb9fb52 RS |
2972 | int rc = 0; |
2973 | int flags = 0; | |
2974 | ||
2975 | cifs_dbg(FYI, "create/open\n"); | |
352d96f3 | 2976 | if (!ses || !server) |
1eb9fb52 RS |
2977 | return -EIO; |
2978 | ||
2979 | if (smb3_encryption_required(tcon)) | |
2980 | flags |= CIFS_TRANSFORM_REQ; | |
2981 | ||
40eff45b | 2982 | memset(&rqst, 0, sizeof(struct smb_rqst)); |
1eb9fb52 | 2983 | memset(&iov, 0, sizeof(iov)); |
40eff45b | 2984 | rqst.rq_iov = iov; |
4d8dfafc | 2985 | rqst.rq_nvec = SMB2_CREATE_IOV_SIZE; |
1eb9fb52 | 2986 | |
352d96f3 AA |
2987 | rc = SMB2_open_init(tcon, server, |
2988 | &rqst, oplock, oparms, path); | |
1eb9fb52 RS |
2989 | if (rc) |
2990 | goto creat_exit; | |
40eff45b | 2991 | |
efe2e9f3 SF |
2992 | trace_smb3_open_enter(xid, tcon->tid, tcon->ses->Suid, |
2993 | oparms->create_options, oparms->desired_access); | |
2994 | ||
352d96f3 AA |
2995 | rc = cifs_send_recv(xid, ses, server, |
2996 | &rqst, &resp_buftype, flags, | |
4f33bc35 | 2997 | &rsp_iov); |
da502f7d | 2998 | rsp = (struct smb2_create_rsp *)rsp_iov.iov_base; |
2503a0db PS |
2999 | |
3000 | if (rc != 0) { | |
3001 | cifs_stats_fail_inc(tcon, SMB2_CREATE_HE); | |
91cb74f5 RS |
3002 | if (err_iov && rsp) { |
3003 | *err_iov = rsp_iov; | |
9d874c36 | 3004 | *buftype = resp_buftype; |
91cb74f5 RS |
3005 | resp_buftype = CIFS_NO_BUFFER; |
3006 | rsp = NULL; | |
3007 | } | |
28d59363 SF |
3008 | trace_smb3_open_err(xid, tcon->tid, ses->Suid, |
3009 | oparms->create_options, oparms->desired_access, rc); | |
7dcc82c2 | 3010 | if (rc == -EREMCHG) { |
a0a3036b JP |
3011 | pr_warn_once("server share %s deleted\n", |
3012 | tcon->treeName); | |
7dcc82c2 SF |
3013 | tcon->need_reconnect = true; |
3014 | } | |
2503a0db | 3015 | goto creat_exit; |
6b789518 SF |
3016 | } else if (rsp == NULL) /* unlikely to happen, but safer to check */ |
3017 | goto creat_exit; | |
3018 | else | |
351a59da PA |
3019 | trace_smb3_open_done(xid, rsp->PersistentFileId, tcon->tid, ses->Suid, |
3020 | oparms->create_options, oparms->desired_access); | |
2503a0db | 3021 | |
fae8044c | 3022 | atomic_inc(&tcon->num_remote_opens); |
351a59da PA |
3023 | oparms->fid->persistent_fid = rsp->PersistentFileId; |
3024 | oparms->fid->volatile_fid = rsp->VolatileFileId; | |
86f740f2 | 3025 | oparms->fid->access = oparms->desired_access; |
dfe33f9a | 3026 | #ifdef CONFIG_CIFS_DEBUG2 |
0d35e382 | 3027 | oparms->fid->mid = le64_to_cpu(rsp->hdr.MessageId); |
dfe33f9a | 3028 | #endif /* CIFS_DEBUG2 */ |
f0df737e PS |
3029 | |
3030 | if (buf) { | |
fbcff33d KC |
3031 | buf->CreationTime = rsp->CreationTime; |
3032 | buf->LastAccessTime = rsp->LastAccessTime; | |
3033 | buf->LastWriteTime = rsp->LastWriteTime; | |
3034 | buf->ChangeTime = rsp->ChangeTime; | |
f0df737e PS |
3035 | buf->AllocationSize = rsp->AllocationSize; |
3036 | buf->EndOfFile = rsp->EndofFile; | |
3037 | buf->Attributes = rsp->FileAttributes; | |
3038 | buf->NumberOfLinks = cpu_to_le32(1); | |
3039 | buf->DeletePending = 0; | |
3040 | } | |
2e44b288 | 3041 | |
89a5bfa3 SF |
3042 | |
3043 | smb2_parse_contexts(server, rsp, &oparms->fid->epoch, | |
69dda305 | 3044 | oparms->fid->lease_key, oplock, buf, posix); |
2503a0db | 3045 | creat_exit: |
1eb9fb52 | 3046 | SMB2_open_free(&rqst); |
2503a0db PS |
3047 | free_rsp_buf(resp_buftype, rsp); |
3048 | return rc; | |
3049 | } | |
3050 | ||
4a72dafa | 3051 | int |
352d96f3 AA |
3052 | SMB2_ioctl_init(struct cifs_tcon *tcon, struct TCP_Server_Info *server, |
3053 | struct smb_rqst *rqst, | |
ccdc77a3 | 3054 | u64 persistent_fid, u64 volatile_fid, u32 opcode, |
400d0ad6 | 3055 | char *in_data, u32 indatalen, |
153322f7 | 3056 | __u32 max_response_size) |
4a72dafa SF |
3057 | { |
3058 | struct smb2_ioctl_req *req; | |
ccdc77a3 | 3059 | struct kvec *iov = rqst->rq_iov; |
97754680 | 3060 | unsigned int total_len; |
ccdc77a3 | 3061 | int rc; |
2c87d6a9 | 3062 | char *in_data_buf; |
4a72dafa | 3063 | |
352d96f3 AA |
3064 | rc = smb2_ioctl_req_init(opcode, tcon, server, |
3065 | (void **) &req, &total_len); | |
4a72dafa SF |
3066 | if (rc) |
3067 | return rc; | |
3068 | ||
2c87d6a9 LL |
3069 | if (indatalen) { |
3070 | /* | |
3071 | * indatalen is usually small at a couple of bytes max, so | |
3072 | * just allocate through generic pool | |
3073 | */ | |
d81f0974 | 3074 | in_data_buf = kmemdup(in_data, indatalen, GFP_NOFS); |
2c87d6a9 LL |
3075 | if (!in_data_buf) { |
3076 | cifs_small_buf_release(req); | |
3077 | return -ENOMEM; | |
3078 | } | |
2c87d6a9 LL |
3079 | } |
3080 | ||
4a72dafa SF |
3081 | req->CtlCode = cpu_to_le32(opcode); |
3082 | req->PersistentFileId = persistent_fid; | |
3083 | req->VolatileFileId = volatile_fid; | |
3084 | ||
ccdc77a3 RS |
3085 | iov[0].iov_base = (char *)req; |
3086 | /* | |
3087 | * If no input data, the size of ioctl struct in | |
3088 | * protocol spec still includes a 1 byte data buffer, | |
3089 | * but if input data passed to ioctl, we do not | |
3090 | * want to double count this, so we do not send | |
3091 | * the dummy one byte of data in iovec[0] if sending | |
3092 | * input data (in iovec[1]). | |
3093 | */ | |
4a72dafa SF |
3094 | if (indatalen) { |
3095 | req->InputCount = cpu_to_le32(indatalen); | |
3096 | /* do not set InputOffset if no input data */ | |
3097 | req->InputOffset = | |
97754680 | 3098 | cpu_to_le32(offsetof(struct smb2_ioctl_req, Buffer)); |
ccdc77a3 RS |
3099 | rqst->rq_nvec = 2; |
3100 | iov[0].iov_len = total_len - 1; | |
2c87d6a9 | 3101 | iov[1].iov_base = in_data_buf; |
4a72dafa | 3102 | iov[1].iov_len = indatalen; |
ccdc77a3 RS |
3103 | } else { |
3104 | rqst->rq_nvec = 1; | |
3105 | iov[0].iov_len = total_len; | |
3106 | } | |
4a72dafa SF |
3107 | |
3108 | req->OutputOffset = 0; | |
3109 | req->OutputCount = 0; /* MBZ */ | |
3110 | ||
3111 | /* | |
153322f7 SF |
3112 | * In most cases max_response_size is set to 16K (CIFSMaxBufSize) |
3113 | * We Could increase default MaxOutputResponse, but that could require | |
3114 | * more credits. Windows typically sets this smaller, but for some | |
4a72dafa SF |
3115 | * ioctls it may be useful to allow server to send more. No point |
3116 | * limiting what the server can send as long as fits in one credit | |
153322f7 SF |
3117 | * We can not handle more than CIFS_MAX_BUF_SIZE yet but may want |
3118 | * to increase this limit up in the future. | |
3119 | * Note that for snapshot queries that servers like Azure expect that | |
3120 | * the first query be minimal size (and just used to get the number/size | |
3121 | * of previous versions) so response size must be specified as EXACTLY | |
3122 | * sizeof(struct snapshot_array) which is 16 when rounded up to multiple | |
3123 | * of eight bytes. Currently that is the only case where we set max | |
3124 | * response size smaller. | |
4a72dafa | 3125 | */ |
153322f7 | 3126 | req->MaxOutputResponse = cpu_to_le32(max_response_size); |
0d35e382 | 3127 | req->hdr.CreditCharge = |
ebf57440 NJ |
3128 | cpu_to_le16(DIV_ROUND_UP(max(indatalen, max_response_size), |
3129 | SMB2_MAX_BUFFER_SIZE)); | |
400d0ad6 EM |
3130 | /* always an FSCTL (for now) */ |
3131 | req->Flags = cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL); | |
4a72dafa | 3132 | |
4587eee0 SF |
3133 | /* validate negotiate request must be signed - see MS-SMB2 3.2.5.5 */ |
3134 | if (opcode == FSCTL_VALIDATE_NEGOTIATE_INFO) | |
0d35e382 | 3135 | req->hdr.Flags |= SMB2_FLAGS_SIGNED; |
4a72dafa | 3136 | |
ccdc77a3 RS |
3137 | return 0; |
3138 | } | |
3139 | ||
3140 | void | |
3141 | SMB2_ioctl_free(struct smb_rqst *rqst) | |
3142 | { | |
6457c20e | 3143 | int i; |
2c87d6a9 | 3144 | if (rqst && rqst->rq_iov) { |
ccdc77a3 | 3145 | cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */ |
6457c20e MZ |
3146 | for (i = 1; i < rqst->rq_nvec; i++) |
3147 | if (rqst->rq_iov[i].iov_base != smb2_padding) | |
3148 | kfree(rqst->rq_iov[i].iov_base); | |
2c87d6a9 | 3149 | } |
ccdc77a3 RS |
3150 | } |
3151 | ||
153322f7 | 3152 | |
ccdc77a3 RS |
3153 | /* |
3154 | * SMB2 IOCTL is used for both IOCTLs and FSCTLs | |
3155 | */ | |
3156 | int | |
3157 | SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, | |
400d0ad6 EM |
3158 | u64 volatile_fid, u32 opcode, char *in_data, u32 indatalen, |
3159 | u32 max_out_data_len, char **out_data, | |
3160 | u32 *plen /* returned data len */) | |
ccdc77a3 RS |
3161 | { |
3162 | struct smb_rqst rqst; | |
3163 | struct smb2_ioctl_rsp *rsp = NULL; | |
3164 | struct cifs_ses *ses; | |
352d96f3 | 3165 | struct TCP_Server_Info *server; |
72c419d9 | 3166 | struct kvec iov[SMB2_IOCTL_IOV_SIZE]; |
ccdc77a3 RS |
3167 | struct kvec rsp_iov = {NULL, 0}; |
3168 | int resp_buftype = CIFS_NO_BUFFER; | |
3169 | int rc = 0; | |
3170 | int flags = 0; | |
3171 | ||
3172 | cifs_dbg(FYI, "SMB2 IOCTL\n"); | |
3173 | ||
3174 | if (out_data != NULL) | |
3175 | *out_data = NULL; | |
3176 | ||
3177 | /* zero out returned data len, in case of error */ | |
3178 | if (plen) | |
3179 | *plen = 0; | |
3180 | ||
352d96f3 | 3181 | if (!tcon) |
ccdc77a3 RS |
3182 | return -EIO; |
3183 | ||
352d96f3 | 3184 | ses = tcon->ses; |
ac6ad7a8 CIK |
3185 | if (!ses) |
3186 | return -EIO; | |
352d96f3 AA |
3187 | |
3188 | server = cifs_pick_channel(ses); | |
ac6ad7a8 | 3189 | if (!server) |
ccdc77a3 RS |
3190 | return -EIO; |
3191 | ||
3192 | if (smb3_encryption_required(tcon)) | |
3193 | flags |= CIFS_TRANSFORM_REQ; | |
3194 | ||
40eff45b | 3195 | memset(&rqst, 0, sizeof(struct smb_rqst)); |
ccdc77a3 | 3196 | memset(&iov, 0, sizeof(iov)); |
40eff45b | 3197 | rqst.rq_iov = iov; |
72c419d9 | 3198 | rqst.rq_nvec = SMB2_IOCTL_IOV_SIZE; |
ccdc77a3 | 3199 | |
352d96f3 AA |
3200 | rc = SMB2_ioctl_init(tcon, server, |
3201 | &rqst, persistent_fid, volatile_fid, opcode, | |
400d0ad6 | 3202 | in_data, indatalen, max_out_data_len); |
ccdc77a3 RS |
3203 | if (rc) |
3204 | goto ioctl_exit; | |
40eff45b | 3205 | |
352d96f3 AA |
3206 | rc = cifs_send_recv(xid, ses, server, |
3207 | &rqst, &resp_buftype, flags, | |
97754680 | 3208 | &rsp_iov); |
da502f7d | 3209 | rsp = (struct smb2_ioctl_rsp *)rsp_iov.iov_base; |
4a72dafa | 3210 | |
eccb4422 SF |
3211 | if (rc != 0) |
3212 | trace_smb3_fsctl_err(xid, persistent_fid, tcon->tid, | |
3213 | ses->Suid, 0, opcode, rc); | |
3214 | ||
2f3ebaba | 3215 | if ((rc != 0) && (rc != -EINVAL) && (rc != -E2BIG)) { |
8e353106 | 3216 | cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE); |
4a72dafa | 3217 | goto ioctl_exit; |
9bf0c9cd SF |
3218 | } else if (rc == -EINVAL) { |
3219 | if ((opcode != FSCTL_SRV_COPYCHUNK_WRITE) && | |
3220 | (opcode != FSCTL_SRV_COPYCHUNK)) { | |
8e353106 | 3221 | cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE); |
9bf0c9cd SF |
3222 | goto ioctl_exit; |
3223 | } | |
2f3ebaba RS |
3224 | } else if (rc == -E2BIG) { |
3225 | if (opcode != FSCTL_QUERY_ALLOCATED_RANGES) { | |
3226 | cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE); | |
3227 | goto ioctl_exit; | |
3228 | } | |
4a72dafa SF |
3229 | } |
3230 | ||
3231 | /* check if caller wants to look at return data or just return rc */ | |
3232 | if ((plen == NULL) || (out_data == NULL)) | |
3233 | goto ioctl_exit; | |
3234 | ||
4d9beec2 SF |
3235 | /* |
3236 | * Although unlikely to be possible for rsp to be null and rc not set, | |
3237 | * adding check below is slightly safer long term (and quiets Coverity | |
3238 | * warning) | |
3239 | */ | |
3240 | if (rsp == NULL) { | |
3241 | rc = -EIO; | |
3242 | goto ioctl_exit; | |
3243 | } | |
3244 | ||
4a72dafa SF |
3245 | *plen = le32_to_cpu(rsp->OutputCount); |
3246 | ||
3247 | /* We check for obvious errors in the output buffer length and offset */ | |
3248 | if (*plen == 0) | |
3249 | goto ioctl_exit; /* server returned no data */ | |
2d204ee9 | 3250 | else if (*plen > rsp_iov.iov_len || *plen > 0xFF00) { |
3175eb9b | 3251 | cifs_tcon_dbg(VFS, "srv returned invalid ioctl length: %d\n", *plen); |
4a72dafa SF |
3252 | *plen = 0; |
3253 | rc = -EIO; | |
3254 | goto ioctl_exit; | |
3255 | } | |
3256 | ||
2d204ee9 | 3257 | if (rsp_iov.iov_len - *plen < le32_to_cpu(rsp->OutputOffset)) { |
3175eb9b | 3258 | cifs_tcon_dbg(VFS, "Malformed ioctl resp: len %d offset %d\n", *plen, |
4a72dafa SF |
3259 | le32_to_cpu(rsp->OutputOffset)); |
3260 | *plen = 0; | |
3261 | rc = -EIO; | |
3262 | goto ioctl_exit; | |
3263 | } | |
3264 | ||
d034feeb Y |
3265 | *out_data = kmemdup((char *)rsp + le32_to_cpu(rsp->OutputOffset), |
3266 | *plen, GFP_KERNEL); | |
4a72dafa SF |
3267 | if (*out_data == NULL) { |
3268 | rc = -ENOMEM; | |
3269 | goto ioctl_exit; | |
3270 | } | |
3271 | ||
4a72dafa | 3272 | ioctl_exit: |
ccdc77a3 | 3273 | SMB2_ioctl_free(&rqst); |
4a72dafa SF |
3274 | free_rsp_buf(resp_buftype, rsp); |
3275 | return rc; | |
3276 | } | |
3277 | ||
64a5cfa6 SF |
3278 | /* |
3279 | * Individual callers to ioctl worker function follow | |
3280 | */ | |
3281 | ||
3282 | int | |
3283 | SMB2_set_compression(const unsigned int xid, struct cifs_tcon *tcon, | |
3284 | u64 persistent_fid, u64 volatile_fid) | |
3285 | { | |
3286 | int rc; | |
64a5cfa6 SF |
3287 | struct compress_ioctl fsctl_input; |
3288 | char *ret_data = NULL; | |
3289 | ||
3290 | fsctl_input.CompressionState = | |
bc09d141 | 3291 | cpu_to_le16(COMPRESSION_FORMAT_DEFAULT); |
64a5cfa6 SF |
3292 | |
3293 | rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid, | |
400d0ad6 | 3294 | FSCTL_SET_COMPRESSION, |
64a5cfa6 | 3295 | (char *)&fsctl_input /* data input */, |
153322f7 SF |
3296 | 2 /* in data len */, CIFSMaxBufSize /* max out data */, |
3297 | &ret_data /* out data */, NULL); | |
64a5cfa6 SF |
3298 | |
3299 | cifs_dbg(FYI, "set compression rc %d\n", rc); | |
64a5cfa6 SF |
3300 | |
3301 | return rc; | |
3302 | } | |
3303 | ||
8eb4ecfa | 3304 | int |
352d96f3 AA |
3305 | SMB2_close_init(struct cifs_tcon *tcon, struct TCP_Server_Info *server, |
3306 | struct smb_rqst *rqst, | |
43f8a6a7 | 3307 | u64 persistent_fid, u64 volatile_fid, bool query_attrs) |
8eb4ecfa RS |
3308 | { |
3309 | struct smb2_close_req *req; | |
3310 | struct kvec *iov = rqst->rq_iov; | |
3311 | unsigned int total_len; | |
3312 | int rc; | |
3313 | ||
352d96f3 AA |
3314 | rc = smb2_plain_req_init(SMB2_CLOSE, tcon, server, |
3315 | (void **) &req, &total_len); | |
8eb4ecfa RS |
3316 | if (rc) |
3317 | return rc; | |
3318 | ||
351a59da PA |
3319 | req->PersistentFileId = persistent_fid; |
3320 | req->VolatileFileId = volatile_fid; | |
43f8a6a7 SF |
3321 | if (query_attrs) |
3322 | req->Flags = SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB; | |
3323 | else | |
3324 | req->Flags = 0; | |
8eb4ecfa RS |
3325 | iov[0].iov_base = (char *)req; |
3326 | iov[0].iov_len = total_len; | |
3327 | ||
3328 | return 0; | |
3329 | } | |
3330 | ||
3331 | void | |
3332 | SMB2_close_free(struct smb_rqst *rqst) | |
3333 | { | |
32a1fb36 RS |
3334 | if (rqst && rqst->rq_iov) |
3335 | cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */ | |
8eb4ecfa RS |
3336 | } |
3337 | ||
2503a0db | 3338 | int |
43f8a6a7 SF |
3339 | __SMB2_close(const unsigned int xid, struct cifs_tcon *tcon, |
3340 | u64 persistent_fid, u64 volatile_fid, | |
3341 | struct smb2_file_network_open_info *pbuf) | |
2503a0db | 3342 | { |
40eff45b | 3343 | struct smb_rqst rqst; |
8eb4ecfa | 3344 | struct smb2_close_rsp *rsp = NULL; |
2503a0db | 3345 | struct cifs_ses *ses = tcon->ses; |
352d96f3 | 3346 | struct TCP_Server_Info *server = cifs_pick_channel(ses); |
2503a0db | 3347 | struct kvec iov[1]; |
da502f7d | 3348 | struct kvec rsp_iov; |
ef2298a0 | 3349 | int resp_buftype = CIFS_NO_BUFFER; |
2503a0db | 3350 | int rc = 0; |
9e8fae25 | 3351 | int flags = 0; |
43f8a6a7 | 3352 | bool query_attrs = false; |
2503a0db | 3353 | |
f96637be | 3354 | cifs_dbg(FYI, "Close\n"); |
2503a0db | 3355 | |
352d96f3 | 3356 | if (!ses || !server) |
2503a0db PS |
3357 | return -EIO; |
3358 | ||
5a77e75f | 3359 | if (smb3_encryption_required(tcon)) |
7fb8986e PS |
3360 | flags |= CIFS_TRANSFORM_REQ; |
3361 | ||
40eff45b | 3362 | memset(&rqst, 0, sizeof(struct smb_rqst)); |
8eb4ecfa | 3363 | memset(&iov, 0, sizeof(iov)); |
40eff45b RS |
3364 | rqst.rq_iov = iov; |
3365 | rqst.rq_nvec = 1; | |
3366 | ||
43f8a6a7 SF |
3367 | /* check if need to ask server to return timestamps in close response */ |
3368 | if (pbuf) | |
3369 | query_attrs = true; | |
3370 | ||
f90f9797 | 3371 | trace_smb3_close_enter(xid, persistent_fid, tcon->tid, ses->Suid); |
352d96f3 AA |
3372 | rc = SMB2_close_init(tcon, server, |
3373 | &rqst, persistent_fid, volatile_fid, | |
43f8a6a7 | 3374 | query_attrs); |
8eb4ecfa RS |
3375 | if (rc) |
3376 | goto close_exit; | |
3377 | ||
352d96f3 AA |
3378 | rc = cifs_send_recv(xid, ses, server, |
3379 | &rqst, &resp_buftype, flags, &rsp_iov); | |
da502f7d | 3380 | rsp = (struct smb2_close_rsp *)rsp_iov.iov_base; |
2503a0db PS |
3381 | |
3382 | if (rc != 0) { | |
d4a029d2 | 3383 | cifs_stats_fail_inc(tcon, SMB2_CLOSE_HE); |
eccb4422 SF |
3384 | trace_smb3_close_err(xid, persistent_fid, tcon->tid, ses->Suid, |
3385 | rc); | |
2503a0db | 3386 | goto close_exit; |
43f8a6a7 | 3387 | } else { |
f90f9797 SF |
3388 | trace_smb3_close_done(xid, persistent_fid, tcon->tid, |
3389 | ses->Suid); | |
43f8a6a7 SF |
3390 | /* |
3391 | * Note that have to subtract 4 since struct network_open_info | |
3392 | * has a final 4 byte pad that close response does not have | |
3393 | */ | |
3394 | if (pbuf) | |
3395 | memcpy(pbuf, (char *)&rsp->CreationTime, sizeof(*pbuf) - 4); | |
3396 | } | |
2503a0db | 3397 | |
fae8044c | 3398 | atomic_dec(&tcon->num_remote_opens); |
2503a0db | 3399 | close_exit: |
8eb4ecfa | 3400 | SMB2_close_free(&rqst); |
2503a0db | 3401 | free_rsp_buf(resp_buftype, rsp); |
9150c3ad PS |
3402 | |
3403 | /* retry close in a worker thread if this one is interrupted */ | |
2659d3bf | 3404 | if (is_interrupt_error(rc)) { |
9e8fae25 SF |
3405 | int tmp_rc; |
3406 | ||
9150c3ad PS |
3407 | tmp_rc = smb2_handle_cancelled_close(tcon, persistent_fid, |
3408 | volatile_fid); | |
3409 | if (tmp_rc) | |
3410 | cifs_dbg(VFS, "handle cancelled close fid 0x%llx returned error %d\n", | |
3411 | persistent_fid, tmp_rc); | |
3412 | } | |
9150c3ad | 3413 | return rc; |
97ca1762 RS |
3414 | } |
3415 | ||
43f8a6a7 SF |
3416 | int |
3417 | SMB2_close(const unsigned int xid, struct cifs_tcon *tcon, | |
3418 | u64 persistent_fid, u64 volatile_fid) | |
3419 | { | |
3420 | return __SMB2_close(xid, tcon, persistent_fid, volatile_fid, NULL); | |
3421 | } | |
3422 | ||
730928c8 RS |
3423 | int |
3424 | smb2_validate_iov(unsigned int offset, unsigned int buffer_length, | |
3425 | struct kvec *iov, unsigned int min_buf_size) | |
be4cb9e3 | 3426 | { |
c1596ff5 | 3427 | unsigned int smb_len = iov->iov_len; |
1fc6ad2f RS |
3428 | char *end_of_smb = smb_len + (char *)iov->iov_base; |
3429 | char *begin_of_buf = offset + (char *)iov->iov_base; | |
be4cb9e3 PS |
3430 | char *end_of_buf = begin_of_buf + buffer_length; |
3431 | ||
3432 | ||
3433 | if (buffer_length < min_buf_size) { | |
f96637be JP |
3434 | cifs_dbg(VFS, "buffer length %d smaller than minimum size %d\n", |
3435 | buffer_length, min_buf_size); | |
be4cb9e3 PS |
3436 | return -EINVAL; |
3437 | } | |
3438 | ||
3439 | /* check if beyond RFC1001 maximum length */ | |
3440 | if ((smb_len > 0x7FFFFF) || (buffer_length > 0x7FFFFF)) { | |
f96637be JP |
3441 | cifs_dbg(VFS, "buffer length %d or smb length %d too large\n", |
3442 | buffer_length, smb_len); | |
be4cb9e3 PS |
3443 | return -EINVAL; |
3444 | } | |
3445 | ||
3446 | if ((begin_of_buf > end_of_smb) || (end_of_buf > end_of_smb)) { | |
a0a3036b | 3447 | cifs_dbg(VFS, "Invalid server response, bad offset to data\n"); |
be4cb9e3 PS |
3448 | return -EINVAL; |
3449 | } | |
3450 | ||
3451 | return 0; | |
3452 | } | |
3453 | ||
3454 | /* | |
3455 | * If SMB buffer fields are valid, copy into temporary buffer to hold result. | |
3456 | * Caller must free buffer. | |
3457 | */ | |
c5a5f38f RS |
3458 | int |
3459 | smb2_validate_and_copy_iov(unsigned int offset, unsigned int buffer_length, | |
3460 | struct kvec *iov, unsigned int minbufsize, | |
3461 | char *data) | |
be4cb9e3 | 3462 | { |
1fc6ad2f | 3463 | char *begin_of_buf = offset + (char *)iov->iov_base; |
be4cb9e3 PS |
3464 | int rc; |
3465 | ||
3466 | if (!data) | |
3467 | return -EINVAL; | |
3468 | ||
730928c8 | 3469 | rc = smb2_validate_iov(offset, buffer_length, iov, minbufsize); |
be4cb9e3 PS |
3470 | if (rc) |
3471 | return rc; | |
3472 | ||
3473 | memcpy(data, begin_of_buf, buffer_length); | |
3474 | ||
3475 | return 0; | |
3476 | } | |
3477 | ||
296ecbae | 3478 | int |
352d96f3 AA |
3479 | SMB2_query_info_init(struct cifs_tcon *tcon, struct TCP_Server_Info *server, |
3480 | struct smb_rqst *rqst, | |
296ecbae RS |
3481 | u64 persistent_fid, u64 volatile_fid, |
3482 | u8 info_class, u8 info_type, u32 additional_info, | |
f5b05d62 | 3483 | size_t output_len, size_t input_len, void *input) |
be4cb9e3 PS |
3484 | { |
3485 | struct smb2_query_info_req *req; | |
296ecbae | 3486 | struct kvec *iov = rqst->rq_iov; |
b2fb7fec | 3487 | unsigned int total_len; |
296ecbae | 3488 | int rc; |
be4cb9e3 | 3489 | |
352d96f3 AA |
3490 | rc = smb2_plain_req_init(SMB2_QUERY_INFO, tcon, server, |
3491 | (void **) &req, &total_len); | |
be4cb9e3 PS |
3492 | if (rc) |
3493 | return rc; | |
3494 | ||
42c493c1 | 3495 | req->InfoType = info_type; |
f0df737e | 3496 | req->FileInfoClass = info_class; |
be4cb9e3 PS |
3497 | req->PersistentFileId = persistent_fid; |
3498 | req->VolatileFileId = volatile_fid; | |
42c493c1 | 3499 | req->AdditionalInformation = cpu_to_le32(additional_info); |
48923d2a | 3500 | |
f0df737e | 3501 | req->OutputBufferLength = cpu_to_le32(output_len); |
f5b05d62 RS |
3502 | if (input_len) { |
3503 | req->InputBufferLength = cpu_to_le32(input_len); | |
3504 | /* total_len for smb query request never close to le16 max */ | |
3505 | req->InputBufferOffset = cpu_to_le16(total_len - 1); | |
3506 | memcpy(req->Buffer, input, input_len); | |
3507 | } | |
be4cb9e3 PS |
3508 | |
3509 | iov[0].iov_base = (char *)req; | |
b2fb7fec | 3510 | /* 1 for Buffer */ |
f5b05d62 | 3511 | iov[0].iov_len = total_len - 1 + input_len; |
296ecbae RS |
3512 | return 0; |
3513 | } | |
3514 | ||
3515 | void | |
3516 | SMB2_query_info_free(struct smb_rqst *rqst) | |
3517 | { | |
32a1fb36 RS |
3518 | if (rqst && rqst->rq_iov) |
3519 | cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */ | |
296ecbae RS |
3520 | } |
3521 | ||
3522 | static int | |
3523 | query_info(const unsigned int xid, struct cifs_tcon *tcon, | |
3524 | u64 persistent_fid, u64 volatile_fid, u8 info_class, u8 info_type, | |
3525 | u32 additional_info, size_t output_len, size_t min_len, void **data, | |
3526 | u32 *dlen) | |
3527 | { | |
3528 | struct smb_rqst rqst; | |
3529 | struct smb2_query_info_rsp *rsp = NULL; | |
3530 | struct kvec iov[1]; | |
3531 | struct kvec rsp_iov; | |
3532 | int rc = 0; | |
ef2298a0 | 3533 | int resp_buftype = CIFS_NO_BUFFER; |
296ecbae | 3534 | struct cifs_ses *ses = tcon->ses; |
ac6ad7a8 | 3535 | struct TCP_Server_Info *server; |
296ecbae | 3536 | int flags = 0; |
73aaf920 | 3537 | bool allocated = false; |
296ecbae RS |
3538 | |
3539 | cifs_dbg(FYI, "Query Info\n"); | |
3540 | ||
ac6ad7a8 CIK |
3541 | if (!ses) |
3542 | return -EIO; | |
352d96f3 | 3543 | server = cifs_pick_channel(ses); |
ac6ad7a8 | 3544 | if (!server) |
296ecbae RS |
3545 | return -EIO; |
3546 | ||
3547 | if (smb3_encryption_required(tcon)) | |
3548 | flags |= CIFS_TRANSFORM_REQ; | |
be4cb9e3 | 3549 | |
40eff45b | 3550 | memset(&rqst, 0, sizeof(struct smb_rqst)); |
296ecbae | 3551 | memset(&iov, 0, sizeof(iov)); |
40eff45b RS |
3552 | rqst.rq_iov = iov; |
3553 | rqst.rq_nvec = 1; | |
3554 | ||
352d96f3 AA |
3555 | rc = SMB2_query_info_init(tcon, server, |
3556 | &rqst, persistent_fid, volatile_fid, | |
296ecbae | 3557 | info_class, info_type, additional_info, |
f5b05d62 | 3558 | output_len, 0, NULL); |
296ecbae RS |
3559 | if (rc) |
3560 | goto qinf_exit; | |
3561 | ||
d42043a6 SF |
3562 | trace_smb3_query_info_enter(xid, persistent_fid, tcon->tid, |
3563 | ses->Suid, info_class, (__u32)info_type); | |
3564 | ||
352d96f3 AA |
3565 | rc = cifs_send_recv(xid, ses, server, |
3566 | &rqst, &resp_buftype, flags, &rsp_iov); | |
da502f7d | 3567 | rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; |
e5d04887 | 3568 | |
be4cb9e3 PS |
3569 | if (rc) { |
3570 | cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE); | |
eccb4422 SF |
3571 | trace_smb3_query_info_err(xid, persistent_fid, tcon->tid, |
3572 | ses->Suid, info_class, (__u32)info_type, rc); | |
be4cb9e3 PS |
3573 | goto qinf_exit; |
3574 | } | |
3575 | ||
d42043a6 SF |
3576 | trace_smb3_query_info_done(xid, persistent_fid, tcon->tid, |
3577 | ses->Suid, info_class, (__u32)info_type); | |
3578 | ||
42c493c1 SP |
3579 | if (dlen) { |
3580 | *dlen = le32_to_cpu(rsp->OutputBufferLength); | |
3581 | if (!*data) { | |
3582 | *data = kmalloc(*dlen, GFP_KERNEL); | |
3583 | if (!*data) { | |
3175eb9b | 3584 | cifs_tcon_dbg(VFS, |
42c493c1 SP |
3585 | "Error %d allocating memory for acl\n", |
3586 | rc); | |
3587 | *dlen = 0; | |
73aaf920 | 3588 | rc = -ENOMEM; |
42c493c1 SP |
3589 | goto qinf_exit; |
3590 | } | |
73aaf920 | 3591 | allocated = true; |
42c493c1 SP |
3592 | } |
3593 | } | |
3594 | ||
c5a5f38f RS |
3595 | rc = smb2_validate_and_copy_iov(le16_to_cpu(rsp->OutputBufferOffset), |
3596 | le32_to_cpu(rsp->OutputBufferLength), | |
3597 | &rsp_iov, min_len, *data); | |
73aaf920 CIK |
3598 | if (rc && allocated) { |
3599 | kfree(*data); | |
3600 | *data = NULL; | |
3601 | *dlen = 0; | |
3602 | } | |
be4cb9e3 PS |
3603 | |
3604 | qinf_exit: | |
296ecbae | 3605 | SMB2_query_info_free(&rqst); |
be4cb9e3 PS |
3606 | free_rsp_buf(resp_buftype, rsp); |
3607 | return rc; | |
3608 | } | |
9094fad1 | 3609 | |
42c493c1 SP |
3610 | int SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon, |
3611 | u64 persistent_fid, u64 volatile_fid, struct smb2_file_all_info *data) | |
3612 | { | |
3613 | return query_info(xid, tcon, persistent_fid, volatile_fid, | |
3614 | FILE_ALL_INFORMATION, SMB2_O_INFO_FILE, 0, | |
3615 | sizeof(struct smb2_file_all_info) + PATH_MAX * 2, | |
3616 | sizeof(struct smb2_file_all_info), (void **)&data, | |
3617 | NULL); | |
3618 | } | |
3619 | ||
e0ae8a9a SF |
3620 | #if 0 |
3621 | /* currently unused, as now we are doing compounding instead (see smb311_posix_query_path_info) */ | |
b1bc1874 SF |
3622 | int |
3623 | SMB311_posix_query_info(const unsigned int xid, struct cifs_tcon *tcon, | |
3624 | u64 persistent_fid, u64 volatile_fid, struct smb311_posix_qinfo *data, u32 *plen) | |
3625 | { | |
3626 | size_t output_len = sizeof(struct smb311_posix_qinfo *) + | |
3627 | (sizeof(struct cifs_sid) * 2) + (PATH_MAX * 2); | |
3628 | *plen = 0; | |
3629 | ||
3630 | return query_info(xid, tcon, persistent_fid, volatile_fid, | |
3631 | SMB_FIND_FILE_POSIX_INFO, SMB2_O_INFO_FILE, 0, | |
3632 | output_len, sizeof(struct smb311_posix_qinfo), (void **)&data, plen); | |
e0ae8a9a | 3633 | /* Note caller must free "data" (passed in above). It may be allocated in query_info call */ |
b1bc1874 | 3634 | } |
e0ae8a9a | 3635 | #endif |
b1bc1874 | 3636 | |
f0df737e | 3637 | int |
42c493c1 | 3638 | SMB2_query_acl(const unsigned int xid, struct cifs_tcon *tcon, |
3970acf7 | 3639 | u64 persistent_fid, u64 volatile_fid, |
9541b813 | 3640 | void **data, u32 *plen, u32 extra_info) |
f0df737e | 3641 | { |
9541b813 BP |
3642 | __u32 additional_info = OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO | |
3643 | extra_info; | |
42c493c1 SP |
3644 | *plen = 0; |
3645 | ||
f0df737e | 3646 | return query_info(xid, tcon, persistent_fid, volatile_fid, |
42c493c1 | 3647 | 0, SMB2_O_INFO_SECURITY, additional_info, |
ee25c6dd | 3648 | SMB2_MAX_BUFFER_SIZE, MIN_SEC_DESC_LEN, data, plen); |
f0df737e PS |
3649 | } |
3650 | ||
3651 | int | |
3652 | SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon, | |
3653 | u64 persistent_fid, u64 volatile_fid, __le64 *uniqueid) | |
3654 | { | |
3655 | return query_info(xid, tcon, persistent_fid, volatile_fid, | |
42c493c1 SP |
3656 | FILE_INTERNAL_INFORMATION, SMB2_O_INFO_FILE, 0, |
3657 | sizeof(struct smb2_file_internal_info), | |
f0df737e | 3658 | sizeof(struct smb2_file_internal_info), |
42c493c1 | 3659 | (void **)&uniqueid, NULL); |
f0df737e PS |
3660 | } |
3661 | ||
c3498185 SF |
3662 | /* |
3663 | * CHANGE_NOTIFY Request is sent to get notifications on changes to a directory | |
3664 | * See MS-SMB2 2.2.35 and 2.2.36 | |
3665 | */ | |
3666 | ||
388962e8 | 3667 | static int |
c3498185 | 3668 | SMB2_notify_init(const unsigned int xid, struct smb_rqst *rqst, |
352d96f3 AA |
3669 | struct cifs_tcon *tcon, struct TCP_Server_Info *server, |
3670 | u64 persistent_fid, u64 volatile_fid, | |
3671 | u32 completion_filter, bool watch_tree) | |
c3498185 SF |
3672 | { |
3673 | struct smb2_change_notify_req *req; | |
3674 | struct kvec *iov = rqst->rq_iov; | |
3675 | unsigned int total_len; | |
3676 | int rc; | |
3677 | ||
352d96f3 AA |
3678 | rc = smb2_plain_req_init(SMB2_CHANGE_NOTIFY, tcon, server, |
3679 | (void **) &req, &total_len); | |
c3498185 SF |
3680 | if (rc) |
3681 | return rc; | |
3682 | ||
351a59da PA |
3683 | req->PersistentFileId = persistent_fid; |
3684 | req->VolatileFileId = volatile_fid; | |
d26c2ddd | 3685 | /* See note 354 of MS-SMB2, 64K max */ |
52870d50 SF |
3686 | req->OutputBufferLength = |
3687 | cpu_to_le32(SMB2_MAX_BUFFER_SIZE - MAX_SMB2_HDR_SIZE); | |
c3498185 SF |
3688 | req->CompletionFilter = cpu_to_le32(completion_filter); |
3689 | if (watch_tree) | |
3690 | req->Flags = cpu_to_le16(SMB2_WATCH_TREE); | |
3691 | else | |
3692 | req->Flags = 0; | |
3693 | ||
3694 | iov[0].iov_base = (char *)req; | |
3695 | iov[0].iov_len = total_len; | |
3696 | ||
3697 | return 0; | |
3698 | } | |
3699 | ||
3700 | int | |
3701 | SMB2_change_notify(const unsigned int xid, struct cifs_tcon *tcon, | |
3702 | u64 persistent_fid, u64 volatile_fid, bool watch_tree, | |
3703 | u32 completion_filter) | |
3704 | { | |
3705 | struct cifs_ses *ses = tcon->ses; | |
352d96f3 | 3706 | struct TCP_Server_Info *server = cifs_pick_channel(ses); |
c3498185 SF |
3707 | struct smb_rqst rqst; |
3708 | struct kvec iov[1]; | |
3709 | struct kvec rsp_iov = {NULL, 0}; | |
3710 | int resp_buftype = CIFS_NO_BUFFER; | |
3711 | int flags = 0; | |
3712 | int rc = 0; | |
3713 | ||
3714 | cifs_dbg(FYI, "change notify\n"); | |
352d96f3 | 3715 | if (!ses || !server) |
c3498185 SF |
3716 | return -EIO; |
3717 | ||
3718 | if (smb3_encryption_required(tcon)) | |
3719 | flags |= CIFS_TRANSFORM_REQ; | |
3720 | ||
3721 | memset(&rqst, 0, sizeof(struct smb_rqst)); | |
3722 | memset(&iov, 0, sizeof(iov)); | |
3723 | rqst.rq_iov = iov; | |
3724 | rqst.rq_nvec = 1; | |
3725 | ||
352d96f3 AA |
3726 | rc = SMB2_notify_init(xid, &rqst, tcon, server, |
3727 | persistent_fid, volatile_fid, | |
c3498185 SF |
3728 | completion_filter, watch_tree); |
3729 | if (rc) | |
3730 | goto cnotify_exit; | |
3731 | ||
3732 | trace_smb3_notify_enter(xid, persistent_fid, tcon->tid, ses->Suid, | |
3733 | (u8)watch_tree, completion_filter); | |
352d96f3 AA |
3734 | rc = cifs_send_recv(xid, ses, server, |
3735 | &rqst, &resp_buftype, flags, &rsp_iov); | |
c3498185 SF |
3736 | |
3737 | if (rc != 0) { | |
3738 | cifs_stats_fail_inc(tcon, SMB2_CHANGE_NOTIFY_HE); | |
3739 | trace_smb3_notify_err(xid, persistent_fid, tcon->tid, ses->Suid, | |
3740 | (u8)watch_tree, completion_filter, rc); | |
3741 | } else | |
3742 | trace_smb3_notify_done(xid, persistent_fid, tcon->tid, | |
3743 | ses->Suid, (u8)watch_tree, completion_filter); | |
3744 | ||
3745 | cnotify_exit: | |
3746 | if (rqst.rq_iov) | |
3747 | cifs_small_buf_release(rqst.rq_iov[0].iov_base); /* request */ | |
3748 | free_rsp_buf(resp_buftype, rsp_iov.iov_base); | |
3749 | return rc; | |
3750 | } | |
3751 | ||
3752 | ||
3753 | ||
9094fad1 PS |
3754 | /* |
3755 | * This is a no-op for now. We're not really interested in the reply, but | |
3756 | * rather in the fact that the server sent one and that server->lstrp | |
3757 | * gets updated. | |
3758 | * | |
3759 | * FIXME: maybe we should consider checking that the reply matches request? | |
3760 | */ | |
3761 | static void | |
3762 | smb2_echo_callback(struct mid_q_entry *mid) | |
3763 | { | |
3764 | struct TCP_Server_Info *server = mid->callback_data; | |
31473fc4 | 3765 | struct smb2_echo_rsp *rsp = (struct smb2_echo_rsp *)mid->resp_buf; |
34f4deb7 | 3766 | struct cifs_credits credits = { .value = 0, .instance = 0 }; |
9094fad1 | 3767 | |
0fd1d37b | 3768 | if (mid->mid_state == MID_RESPONSE_RECEIVED |
34f4deb7 | 3769 | || mid->mid_state == MID_RESPONSE_MALFORMED) { |
0d35e382 | 3770 | credits.value = le16_to_cpu(rsp->hdr.CreditRequest); |
34f4deb7 PS |
3771 | credits.instance = server->reconnect_instance; |
3772 | } | |
9094fad1 | 3773 | |
70f08f91 | 3774 | release_mid(mid); |
34f4deb7 | 3775 | add_credits(server, &credits, CIFS_ECHO_OP); |
9094fad1 PS |
3776 | } |
3777 | ||
53e0e11e PS |
3778 | void smb2_reconnect_server(struct work_struct *work) |
3779 | { | |
3780 | struct TCP_Server_Info *server = container_of(work, | |
3781 | struct TCP_Server_Info, reconnect.work); | |
3663c904 SP |
3782 | struct TCP_Server_Info *pserver; |
3783 | struct cifs_ses *ses, *ses2; | |
53e0e11e | 3784 | struct cifs_tcon *tcon, *tcon2; |
3663c904 SP |
3785 | struct list_head tmp_list, tmp_ses_list; |
3786 | bool tcon_exist = false, ses_exist = false; | |
8a409cda | 3787 | bool tcon_selected = false; |
18ea4311 | 3788 | int rc; |
3663c904 | 3789 | bool resched = false; |
18ea4311 | 3790 | |
3663c904 SP |
3791 | /* If server is a channel, select the primary channel */ |
3792 | pserver = CIFS_SERVER_IS_CHAN(server) ? server->primary_server : server; | |
53e0e11e PS |
3793 | |
3794 | /* Prevent simultaneous reconnects that can corrupt tcon->rlist list */ | |
3663c904 | 3795 | mutex_lock(&pserver->reconnect_mutex); |
53e0e11e PS |
3796 | |
3797 | INIT_LIST_HEAD(&tmp_list); | |
3663c904 SP |
3798 | INIT_LIST_HEAD(&tmp_ses_list); |
3799 | cifs_dbg(FYI, "Reconnecting tcons and channels\n"); | |
53e0e11e PS |
3800 | |
3801 | spin_lock(&cifs_tcp_ses_lock); | |
3663c904 SP |
3802 | list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) { |
3803 | ||
8a409cda | 3804 | tcon_selected = false; |
3663c904 | 3805 | |
53e0e11e | 3806 | list_for_each_entry(tcon, &ses->tcon_list, tcon_list) { |
96a988ff | 3807 | if (tcon->need_reconnect || tcon->need_reopen_files) { |
53e0e11e PS |
3808 | tcon->tc_count++; |
3809 | list_add_tail(&tcon->rlist, &tmp_list); | |
3663c904 | 3810 | tcon_selected = tcon_exist = true; |
53e0e11e PS |
3811 | } |
3812 | } | |
0ff2b018 RS |
3813 | /* |
3814 | * IPC has the same lifetime as its session and uses its | |
3815 | * refcount. | |
3816 | */ | |
b327a717 AA |
3817 | if (ses->tcon_ipc && ses->tcon_ipc->need_reconnect) { |
3818 | list_add_tail(&ses->tcon_ipc->rlist, &tmp_list); | |
3663c904 SP |
3819 | tcon_selected = tcon_exist = true; |
3820 | ses->ses_count++; | |
3821 | } | |
3822 | /* | |
3823 | * handle the case where channel needs to reconnect | |
3824 | * binding session, but tcon is healthy (some other channel | |
3825 | * is active) | |
3826 | */ | |
88b024f5 | 3827 | spin_lock(&ses->chan_lock); |
3663c904 SP |
3828 | if (!tcon_selected && cifs_chan_needs_reconnect(ses, server)) { |
3829 | list_add_tail(&ses->rlist, &tmp_ses_list); | |
8a409cda | 3830 | ses_exist = true; |
0ff2b018 | 3831 | ses->ses_count++; |
b327a717 | 3832 | } |
88b024f5 | 3833 | spin_unlock(&ses->chan_lock); |
53e0e11e PS |
3834 | } |
3835 | /* | |
3836 | * Get the reference to server struct to be sure that the last call of | |
3837 | * cifs_put_tcon() in the loop below won't release the server pointer. | |
3838 | */ | |
3663c904 | 3839 | if (tcon_exist || ses_exist) |
53e0e11e PS |
3840 | server->srv_count++; |
3841 | ||
3842 | spin_unlock(&cifs_tcp_ses_lock); | |
3843 | ||
3844 | list_for_each_entry_safe(tcon, tcon2, &tmp_list, rlist) { | |
352d96f3 | 3845 | rc = smb2_reconnect(SMB2_INTERNAL_CMD, tcon, server); |
18ea4311 | 3846 | if (!rc) |
96a988ff | 3847 | cifs_reopen_persistent_handles(tcon); |
18ea4311 GP |
3848 | else |
3849 | resched = true; | |
53e0e11e | 3850 | list_del_init(&tcon->rlist); |
0ff2b018 RS |
3851 | if (tcon->ipc) |
3852 | cifs_put_smb_ses(tcon->ses); | |
3853 | else | |
3854 | cifs_put_tcon(tcon); | |
53e0e11e PS |
3855 | } |
3856 | ||
3663c904 SP |
3857 | if (!ses_exist) |
3858 | goto done; | |
3859 | ||
3860 | /* allocate a dummy tcon struct used for reconnect */ | |
3861 | tcon = kzalloc(sizeof(struct cifs_tcon), GFP_KERNEL); | |
3862 | if (!tcon) { | |
3863 | resched = true; | |
a96c9448 XT |
3864 | list_for_each_entry_safe(ses, ses2, &tmp_ses_list, rlist) { |
3865 | list_del_init(&ses->rlist); | |
3866 | cifs_put_smb_ses(ses); | |
3867 | } | |
3663c904 SP |
3868 | goto done; |
3869 | } | |
3870 | ||
fdf59eb5 | 3871 | tcon->status = TID_GOOD; |
3663c904 SP |
3872 | tcon->retry = false; |
3873 | tcon->need_reconnect = false; | |
3874 | ||
3875 | /* now reconnect sessions for necessary channels */ | |
3876 | list_for_each_entry_safe(ses, ses2, &tmp_ses_list, rlist) { | |
3877 | tcon->ses = ses; | |
3878 | rc = smb2_reconnect(SMB2_INTERNAL_CMD, tcon, server); | |
3879 | if (rc) | |
3880 | resched = true; | |
3881 | list_del_init(&ses->rlist); | |
3882 | cifs_put_smb_ses(ses); | |
3883 | } | |
3884 | kfree(tcon); | |
3885 | ||
3886 | done: | |
3887 | cifs_dbg(FYI, "Reconnecting tcons and channels finished\n"); | |
18ea4311 GP |
3888 | if (resched) |
3889 | queue_delayed_work(cifsiod_wq, &server->reconnect, 2 * HZ); | |
3663c904 | 3890 | mutex_unlock(&pserver->reconnect_mutex); |
53e0e11e PS |
3891 | |
3892 | /* now we can safely release srv struct */ | |
3663c904 | 3893 | if (tcon_exist || ses_exist) |
53e0e11e PS |
3894 | cifs_put_tcp_session(server, 1); |
3895 | } | |
3896 | ||
9094fad1 PS |
3897 | int |
3898 | SMB2_echo(struct TCP_Server_Info *server) | |
3899 | { | |
3900 | struct smb2_echo_req *req; | |
3901 | int rc = 0; | |
c713c877 | 3902 | struct kvec iov[1]; |
738f9de5 | 3903 | struct smb_rqst rqst = { .rq_iov = iov, |
c713c877 | 3904 | .rq_nvec = 1 }; |
7f7ae759 | 3905 | unsigned int total_len; |
9094fad1 | 3906 | |
bda487ac | 3907 | cifs_dbg(FYI, "In echo request for conn_id %lld\n", server->conn_id); |
9094fad1 | 3908 | |
d7d7a66a | 3909 | spin_lock(&server->srv_lock); |
1a6a41d4 SP |
3910 | if (server->ops->need_neg && |
3911 | server->ops->need_neg(server)) { | |
d7d7a66a | 3912 | spin_unlock(&server->srv_lock); |
53e0e11e | 3913 | /* No need to send echo on newly established connections */ |
b08484d7 | 3914 | mod_delayed_work(cifsiod_wq, &server->reconnect, 0); |
53e0e11e | 3915 | return rc; |
4fcd1813 | 3916 | } |
d7d7a66a | 3917 | spin_unlock(&server->srv_lock); |
4fcd1813 | 3918 | |
352d96f3 AA |
3919 | rc = smb2_plain_req_init(SMB2_ECHO, NULL, server, |
3920 | (void **)&req, &total_len); | |
9094fad1 PS |
3921 | if (rc) |
3922 | return rc; | |
3923 | ||
0d35e382 | 3924 | req->hdr.CreditRequest = cpu_to_le16(1); |
9094fad1 | 3925 | |
c713c877 RS |
3926 | iov[0].iov_len = total_len; |
3927 | iov[0].iov_base = (char *)req; | |
9094fad1 | 3928 | |
9b7c18a2 | 3929 | rc = cifs_call_async(server, &rqst, NULL, smb2_echo_callback, NULL, |
3349c3a7 | 3930 | server, CIFS_ECHO_OP, NULL); |
9094fad1 | 3931 | if (rc) |
f96637be | 3932 | cifs_dbg(FYI, "Echo request failed: %d\n", rc); |
9094fad1 PS |
3933 | |
3934 | cifs_small_buf_release(req); | |
3935 | return rc; | |
3936 | } | |
7a5cfb19 | 3937 | |
86e14e12 RS |
3938 | void |
3939 | SMB2_flush_free(struct smb_rqst *rqst) | |
3940 | { | |
3941 | if (rqst && rqst->rq_iov) | |
3942 | cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */ | |
3943 | } | |
3944 | ||
7a5cfb19 | 3945 | int |
86e14e12 | 3946 | SMB2_flush_init(const unsigned int xid, struct smb_rqst *rqst, |
352d96f3 AA |
3947 | struct cifs_tcon *tcon, struct TCP_Server_Info *server, |
3948 | u64 persistent_fid, u64 volatile_fid) | |
7a5cfb19 PS |
3949 | { |
3950 | struct smb2_flush_req *req; | |
86e14e12 | 3951 | struct kvec *iov = rqst->rq_iov; |
1f444e4c | 3952 | unsigned int total_len; |
86e14e12 | 3953 | int rc; |
7a5cfb19 | 3954 | |
352d96f3 AA |
3955 | rc = smb2_plain_req_init(SMB2_FLUSH, tcon, server, |
3956 | (void **) &req, &total_len); | |
7a5cfb19 PS |
3957 | if (rc) |
3958 | return rc; | |
3959 | ||
351a59da PA |
3960 | req->PersistentFileId = persistent_fid; |
3961 | req->VolatileFileId = volatile_fid; | |
7a5cfb19 PS |
3962 | |
3963 | iov[0].iov_base = (char *)req; | |
1f444e4c | 3964 | iov[0].iov_len = total_len; |
7a5cfb19 | 3965 | |
86e14e12 RS |
3966 | return 0; |
3967 | } | |
3968 | ||
3969 | int | |
3970 | SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, | |
3971 | u64 volatile_fid) | |
3972 | { | |
3973 | struct cifs_ses *ses = tcon->ses; | |
3974 | struct smb_rqst rqst; | |
3975 | struct kvec iov[1]; | |
3976 | struct kvec rsp_iov = {NULL, 0}; | |
352d96f3 | 3977 | struct TCP_Server_Info *server = cifs_pick_channel(ses); |
86e14e12 RS |
3978 | int resp_buftype = CIFS_NO_BUFFER; |
3979 | int flags = 0; | |
3980 | int rc = 0; | |
3981 | ||
3982 | cifs_dbg(FYI, "flush\n"); | |
3983 | if (!ses || !(ses->server)) | |
3984 | return -EIO; | |
3985 | ||
3986 | if (smb3_encryption_required(tcon)) | |
3987 | flags |= CIFS_TRANSFORM_REQ; | |
3988 | ||
40eff45b | 3989 | memset(&rqst, 0, sizeof(struct smb_rqst)); |
86e14e12 | 3990 | memset(&iov, 0, sizeof(iov)); |
40eff45b RS |
3991 | rqst.rq_iov = iov; |
3992 | rqst.rq_nvec = 1; | |
3993 | ||
352d96f3 AA |
3994 | rc = SMB2_flush_init(xid, &rqst, tcon, server, |
3995 | persistent_fid, volatile_fid); | |
86e14e12 RS |
3996 | if (rc) |
3997 | goto flush_exit; | |
3998 | ||
f90f9797 | 3999 | trace_smb3_flush_enter(xid, persistent_fid, tcon->tid, ses->Suid); |
352d96f3 AA |
4000 | rc = cifs_send_recv(xid, ses, server, |
4001 | &rqst, &resp_buftype, flags, &rsp_iov); | |
7a5cfb19 | 4002 | |
eccb4422 | 4003 | if (rc != 0) { |
7a5cfb19 | 4004 | cifs_stats_fail_inc(tcon, SMB2_FLUSH_HE); |
eccb4422 SF |
4005 | trace_smb3_flush_err(xid, persistent_fid, tcon->tid, ses->Suid, |
4006 | rc); | |
f90f9797 SF |
4007 | } else |
4008 | trace_smb3_flush_done(xid, persistent_fid, tcon->tid, | |
4009 | ses->Suid); | |
7a5cfb19 | 4010 | |
86e14e12 RS |
4011 | flush_exit: |
4012 | SMB2_flush_free(&rqst); | |
da502f7d | 4013 | free_rsp_buf(resp_buftype, rsp_iov.iov_base); |
7a5cfb19 PS |
4014 | return rc; |
4015 | } | |
09a4707e PS |
4016 | |
4017 | /* | |
4018 | * To form a chain of read requests, any read requests after the first should | |
4019 | * have the end_of_chain boolean set to true. | |
4020 | */ | |
4021 | static int | |
738f9de5 | 4022 | smb2_new_read_req(void **buf, unsigned int *total_len, |
2dabfd5b LL |
4023 | struct cifs_io_parms *io_parms, struct cifs_readdata *rdata, |
4024 | unsigned int remaining_bytes, int request_type) | |
09a4707e PS |
4025 | { |
4026 | int rc = -EACCES; | |
d8d9de53 | 4027 | struct smb2_read_req *req = NULL; |
0d35e382 | 4028 | struct smb2_hdr *shdr; |
352d96f3 | 4029 | struct TCP_Server_Info *server = io_parms->server; |
09a4707e | 4030 | |
352d96f3 AA |
4031 | rc = smb2_plain_req_init(SMB2_READ, io_parms->tcon, server, |
4032 | (void **) &req, total_len); | |
09a4707e PS |
4033 | if (rc) |
4034 | return rc; | |
2dabfd5b | 4035 | |
2dabfd5b | 4036 | if (server == NULL) |
09a4707e PS |
4037 | return -ECONNABORTED; |
4038 | ||
0d35e382 RS |
4039 | shdr = &req->hdr; |
4040 | shdr->Id.SyncId.ProcessId = cpu_to_le32(io_parms->pid); | |
09a4707e | 4041 | |
351a59da PA |
4042 | req->PersistentFileId = io_parms->persistent_fid; |
4043 | req->VolatileFileId = io_parms->volatile_fid; | |
09a4707e PS |
4044 | req->ReadChannelInfoOffset = 0; /* reserved */ |
4045 | req->ReadChannelInfoLength = 0; /* reserved */ | |
4046 | req->Channel = 0; /* reserved */ | |
4047 | req->MinimumCount = 0; | |
4048 | req->Length = cpu_to_le32(io_parms->length); | |
4049 | req->Offset = cpu_to_le64(io_parms->offset); | |
d323c246 SF |
4050 | |
4051 | trace_smb3_read_enter(0 /* xid */, | |
4052 | io_parms->persistent_fid, | |
4053 | io_parms->tcon->tid, io_parms->tcon->ses->Suid, | |
4054 | io_parms->offset, io_parms->length); | |
bd3dcc6a LL |
4055 | #ifdef CONFIG_CIFS_SMB_DIRECT |
4056 | /* | |
4057 | * If we want to do a RDMA write, fill in and append | |
4058 | * smbd_buffer_descriptor_v1 to the end of read request | |
4059 | */ | |
bb4c0419 | 4060 | if (server->rdma && rdata && !server->sign && |
bd3dcc6a LL |
4061 | rdata->bytes >= server->smbd_conn->rdma_readwrite_threshold) { |
4062 | ||
4063 | struct smbd_buffer_descriptor_v1 *v1; | |
352d96f3 | 4064 | bool need_invalidate = server->dialect == SMB30_PROT_ID; |
bd3dcc6a LL |
4065 | |
4066 | rdata->mr = smbd_register_mr( | |
4067 | server->smbd_conn, rdata->pages, | |
7cf20bce LL |
4068 | rdata->nr_pages, rdata->page_offset, |
4069 | rdata->tailsz, true, need_invalidate); | |
bd3dcc6a | 4070 | if (!rdata->mr) |
b7972092 | 4071 | return -EAGAIN; |
bd3dcc6a LL |
4072 | |
4073 | req->Channel = SMB2_CHANNEL_RDMA_V1_INVALIDATE; | |
4074 | if (need_invalidate) | |
4075 | req->Channel = SMB2_CHANNEL_RDMA_V1; | |
4076 | req->ReadChannelInfoOffset = | |
d8d9de53 | 4077 | cpu_to_le16(offsetof(struct smb2_read_req, Buffer)); |
bd3dcc6a | 4078 | req->ReadChannelInfoLength = |
2026b06e | 4079 | cpu_to_le16(sizeof(struct smbd_buffer_descriptor_v1)); |
bd3dcc6a | 4080 | v1 = (struct smbd_buffer_descriptor_v1 *) &req->Buffer[0]; |
2026b06e SF |
4081 | v1->offset = cpu_to_le64(rdata->mr->mr->iova); |
4082 | v1->token = cpu_to_le32(rdata->mr->mr->rkey); | |
4083 | v1->length = cpu_to_le32(rdata->mr->mr->length); | |
bd3dcc6a LL |
4084 | |
4085 | *total_len += sizeof(*v1) - 1; | |
4086 | } | |
4087 | #endif | |
09a4707e PS |
4088 | if (request_type & CHAINED_REQUEST) { |
4089 | if (!(request_type & END_OF_CHAIN)) { | |
b8f57ee8 PS |
4090 | /* next 8-byte aligned request */ |
4091 | *total_len = DIV_ROUND_UP(*total_len, 8) * 8; | |
4092 | shdr->NextCommand = cpu_to_le32(*total_len); | |
09a4707e | 4093 | } else /* END_OF_CHAIN */ |
31473fc4 | 4094 | shdr->NextCommand = 0; |
09a4707e | 4095 | if (request_type & RELATED_REQUEST) { |
31473fc4 | 4096 | shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS; |
09a4707e PS |
4097 | /* |
4098 | * Related requests use info from previous read request | |
4099 | * in chain. | |
4100 | */ | |
0d35e382 RS |
4101 | shdr->SessionId = cpu_to_le64(0xFFFFFFFFFFFFFFFF); |
4102 | shdr->Id.SyncId.TreeId = cpu_to_le32(0xFFFFFFFF); | |
351a59da PA |
4103 | req->PersistentFileId = (u64)-1; |
4104 | req->VolatileFileId = (u64)-1; | |
09a4707e PS |
4105 | } |
4106 | } | |
4107 | if (remaining_bytes > io_parms->length) | |
4108 | req->RemainingBytes = cpu_to_le32(remaining_bytes); | |
4109 | else | |
4110 | req->RemainingBytes = 0; | |
4111 | ||
738f9de5 | 4112 | *buf = req; |
09a4707e PS |
4113 | return rc; |
4114 | } | |
4115 | ||
4116 | static void | |
4117 | smb2_readv_callback(struct mid_q_entry *mid) | |
4118 | { | |
4119 | struct cifs_readdata *rdata = mid->callback_data; | |
4120 | struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink); | |
352d96f3 | 4121 | struct TCP_Server_Info *server = rdata->server; |
0d35e382 RS |
4122 | struct smb2_hdr *shdr = |
4123 | (struct smb2_hdr *)rdata->iov[0].iov_base; | |
34f4deb7 | 4124 | struct cifs_credits credits = { .value = 0, .instance = 0 }; |
46f17d17 SF |
4125 | struct smb_rqst rqst = { .rq_iov = &rdata->iov[1], |
4126 | .rq_nvec = 1, | |
8321fec4 | 4127 | .rq_pages = rdata->pages, |
1dbe3466 | 4128 | .rq_offset = rdata->page_offset, |
8321fec4 JL |
4129 | .rq_npages = rdata->nr_pages, |
4130 | .rq_pagesz = rdata->pagesz, | |
4131 | .rq_tailsz = rdata->tailsz }; | |
09a4707e | 4132 | |
352d96f3 AA |
4133 | WARN_ONCE(rdata->server != mid->server, |
4134 | "rdata server %p != mid server %p", | |
4135 | rdata->server, mid->server); | |
4136 | ||
f96637be JP |
4137 | cifs_dbg(FYI, "%s: mid=%llu state=%d result=%d bytes=%u\n", |
4138 | __func__, mid->mid, mid->mid_state, rdata->result, | |
4139 | rdata->bytes); | |
09a4707e PS |
4140 | |
4141 | switch (mid->mid_state) { | |
4142 | case MID_RESPONSE_RECEIVED: | |
34f4deb7 PS |
4143 | credits.value = le16_to_cpu(shdr->CreditRequest); |
4144 | credits.instance = server->reconnect_instance; | |
09a4707e | 4145 | /* result already set, check signature */ |
4326ed2f | 4146 | if (server->sign && !mid->decrypted) { |
3c1bf7e4 PS |
4147 | int rc; |
4148 | ||
0b688cfc | 4149 | rc = smb2_verify_signature(&rqst, server); |
3c1bf7e4 | 4150 | if (rc) |
3175eb9b | 4151 | cifs_tcon_dbg(VFS, "SMB signature verification returned error = %d\n", |
f96637be | 4152 | rc); |
3c1bf7e4 | 4153 | } |
09a4707e | 4154 | /* FIXME: should this be counted toward the initiating task? */ |
34a54d61 PS |
4155 | task_io_account_read(rdata->got_bytes); |
4156 | cifs_stats_bytes_read(tcon, rdata->got_bytes); | |
09a4707e PS |
4157 | break; |
4158 | case MID_REQUEST_SUBMITTED: | |
4159 | case MID_RETRY_NEEDED: | |
4160 | rdata->result = -EAGAIN; | |
d913ed17 PS |
4161 | if (server->sign && rdata->got_bytes) |
4162 | /* reset bytes number since we can not check a sign */ | |
4163 | rdata->got_bytes = 0; | |
4164 | /* FIXME: should this be counted toward the initiating task? */ | |
4165 | task_io_account_read(rdata->got_bytes); | |
4166 | cifs_stats_bytes_read(tcon, rdata->got_bytes); | |
09a4707e | 4167 | break; |
0fd1d37b | 4168 | case MID_RESPONSE_MALFORMED: |
34f4deb7 PS |
4169 | credits.value = le16_to_cpu(shdr->CreditRequest); |
4170 | credits.instance = server->reconnect_instance; | |
30b5ae21 | 4171 | fallthrough; |
09a4707e | 4172 | default: |
6b15eb18 | 4173 | rdata->result = -EIO; |
09a4707e | 4174 | } |
bd3dcc6a LL |
4175 | #ifdef CONFIG_CIFS_SMB_DIRECT |
4176 | /* | |
4177 | * If this rdata has a memmory registered, the MR can be freed | |
4178 | * MR needs to be freed as soon as I/O finishes to prevent deadlock | |
4179 | * because they have limited number and are used for future I/Os | |
4180 | */ | |
4181 | if (rdata->mr) { | |
4182 | smbd_deregister_mr(rdata->mr); | |
4183 | rdata->mr = NULL; | |
4184 | } | |
4185 | #endif | |
082aaa87 | 4186 | if (rdata->result && rdata->result != -ENODATA) { |
09a4707e | 4187 | cifs_stats_fail_inc(tcon, SMB2_READ_HE); |
7d42e72f PS |
4188 | trace_smb3_read_err(0 /* xid */, |
4189 | rdata->cfile->fid.persistent_fid, | |
4190 | tcon->tid, tcon->ses->Suid, rdata->offset, | |
4191 | rdata->bytes, rdata->result); | |
4192 | } else | |
4193 | trace_smb3_read_done(0 /* xid */, | |
4194 | rdata->cfile->fid.persistent_fid, | |
4195 | tcon->tid, tcon->ses->Suid, | |
4196 | rdata->offset, rdata->got_bytes); | |
09a4707e PS |
4197 | |
4198 | queue_work(cifsiod_wq, &rdata->work); | |
70f08f91 | 4199 | release_mid(mid); |
34f4deb7 | 4200 | add_credits(server, &credits, 0); |
09a4707e PS |
4201 | } |
4202 | ||
738f9de5 | 4203 | /* smb2_async_readv - send an async read, and set up mid to handle result */ |
09a4707e PS |
4204 | int |
4205 | smb2_async_readv(struct cifs_readdata *rdata) | |
4206 | { | |
bed9da02 | 4207 | int rc, flags = 0; |
31473fc4 | 4208 | char *buf; |
0d35e382 | 4209 | struct smb2_hdr *shdr; |
09a4707e | 4210 | struct cifs_io_parms io_parms; |
738f9de5 | 4211 | struct smb_rqst rqst = { .rq_iov = rdata->iov, |
c713c877 | 4212 | .rq_nvec = 1 }; |
bed9da02 | 4213 | struct TCP_Server_Info *server; |
352d96f3 | 4214 | struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink); |
738f9de5 | 4215 | unsigned int total_len; |
09a4707e | 4216 | |
f96637be JP |
4217 | cifs_dbg(FYI, "%s: offset=%llu bytes=%u\n", |
4218 | __func__, rdata->offset, rdata->bytes); | |
09a4707e | 4219 | |
352d96f3 AA |
4220 | if (!rdata->server) |
4221 | rdata->server = cifs_pick_channel(tcon->ses); | |
4222 | ||
09a4707e | 4223 | io_parms.tcon = tlink_tcon(rdata->cfile->tlink); |
352d96f3 | 4224 | io_parms.server = server = rdata->server; |
09a4707e PS |
4225 | io_parms.offset = rdata->offset; |
4226 | io_parms.length = rdata->bytes; | |
4227 | io_parms.persistent_fid = rdata->cfile->fid.persistent_fid; | |
4228 | io_parms.volatile_fid = rdata->cfile->fid.volatile_fid; | |
4229 | io_parms.pid = rdata->pid; | |
bed9da02 | 4230 | |
2dabfd5b LL |
4231 | rc = smb2_new_read_req( |
4232 | (void **) &buf, &total_len, &io_parms, rdata, 0, 0); | |
f0b93cb9 | 4233 | if (rc) |
09a4707e PS |
4234 | return rc; |
4235 | ||
5a77e75f | 4236 | if (smb3_encryption_required(io_parms.tcon)) |
7fb8986e PS |
4237 | flags |= CIFS_TRANSFORM_REQ; |
4238 | ||
c713c877 RS |
4239 | rdata->iov[0].iov_base = buf; |
4240 | rdata->iov[0].iov_len = total_len; | |
b8f57ee8 | 4241 | |
0d35e382 | 4242 | shdr = (struct smb2_hdr *)buf; |
09a4707e | 4243 | |
335b7b62 | 4244 | if (rdata->credits.value > 0) { |
31473fc4 | 4245 | shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(rdata->bytes, |
bed9da02 | 4246 | SMB2_MAX_BUFFER_SIZE)); |
88fd98a2 | 4247 | shdr->CreditRequest = cpu_to_le16(le16_to_cpu(shdr->CreditCharge) + 8); |
9a1c67e8 PS |
4248 | |
4249 | rc = adjust_credits(server, &rdata->credits, rdata->bytes); | |
4250 | if (rc) | |
335b7b62 | 4251 | goto async_readv_out; |
9a1c67e8 | 4252 | |
7fb8986e | 4253 | flags |= CIFS_HAS_CREDITS; |
bed9da02 PS |
4254 | } |
4255 | ||
09a4707e | 4256 | kref_get(&rdata->refcount); |
352d96f3 | 4257 | rc = cifs_call_async(server, &rqst, |
09a4707e | 4258 | cifs_readv_receive, smb2_readv_callback, |
3349c3a7 PS |
4259 | smb3_handle_read_data, rdata, flags, |
4260 | &rdata->credits); | |
e5d04887 | 4261 | if (rc) { |
09a4707e | 4262 | kref_put(&rdata->refcount, cifs_readdata_release); |
e5d04887 | 4263 | cifs_stats_fail_inc(io_parms.tcon, SMB2_READ_HE); |
7d42e72f PS |
4264 | trace_smb3_read_err(0 /* xid */, io_parms.persistent_fid, |
4265 | io_parms.tcon->tid, | |
4266 | io_parms.tcon->ses->Suid, | |
4267 | io_parms.offset, io_parms.length, rc); | |
4268 | } | |
09a4707e | 4269 | |
335b7b62 | 4270 | async_readv_out: |
09a4707e PS |
4271 | cifs_small_buf_release(buf); |
4272 | return rc; | |
4273 | } | |
33319141 | 4274 | |
d8e05039 PS |
4275 | int |
4276 | SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms, | |
4277 | unsigned int *nbytes, char **buf, int *buf_type) | |
4278 | { | |
40eff45b | 4279 | struct smb_rqst rqst; |
1efd4fc7 | 4280 | int resp_buftype, rc; |
d8d9de53 | 4281 | struct smb2_read_req *req = NULL; |
d8e05039 | 4282 | struct smb2_read_rsp *rsp = NULL; |
f5688a6d | 4283 | struct kvec iov[1]; |
da502f7d | 4284 | struct kvec rsp_iov; |
738f9de5 | 4285 | unsigned int total_len; |
7fb8986e PS |
4286 | int flags = CIFS_LOG_ERROR; |
4287 | struct cifs_ses *ses = io_parms->tcon->ses; | |
d8e05039 | 4288 | |
352d96f3 AA |
4289 | if (!io_parms->server) |
4290 | io_parms->server = cifs_pick_channel(io_parms->tcon->ses); | |
4291 | ||
d8e05039 | 4292 | *nbytes = 0; |
2dabfd5b | 4293 | rc = smb2_new_read_req((void **)&req, &total_len, io_parms, NULL, 0, 0); |
d8e05039 PS |
4294 | if (rc) |
4295 | return rc; | |
4296 | ||
5a77e75f | 4297 | if (smb3_encryption_required(io_parms->tcon)) |
7fb8986e PS |
4298 | flags |= CIFS_TRANSFORM_REQ; |
4299 | ||
f5688a6d RS |
4300 | iov[0].iov_base = (char *)req; |
4301 | iov[0].iov_len = total_len; | |
b8f57ee8 | 4302 | |
40eff45b RS |
4303 | memset(&rqst, 0, sizeof(struct smb_rqst)); |
4304 | rqst.rq_iov = iov; | |
4305 | rqst.rq_nvec = 1; | |
4306 | ||
352d96f3 AA |
4307 | rc = cifs_send_recv(xid, ses, io_parms->server, |
4308 | &rqst, &resp_buftype, flags, &rsp_iov); | |
da502f7d | 4309 | rsp = (struct smb2_read_rsp *)rsp_iov.iov_base; |
d8e05039 | 4310 | |
a821df3f RS |
4311 | if (rc) { |
4312 | if (rc != -ENODATA) { | |
4313 | cifs_stats_fail_inc(io_parms->tcon, SMB2_READ_HE); | |
4314 | cifs_dbg(VFS, "Send error in read = %d\n", rc); | |
d8d9de53 | 4315 | trace_smb3_read_err(xid, |
351a59da | 4316 | req->PersistentFileId, |
7d42e72f PS |
4317 | io_parms->tcon->tid, ses->Suid, |
4318 | io_parms->offset, io_parms->length, | |
4319 | rc); | |
b0a42f2a | 4320 | } else |
351a59da PA |
4321 | trace_smb3_read_done(xid, req->PersistentFileId, io_parms->tcon->tid, |
4322 | ses->Suid, io_parms->offset, 0); | |
da502f7d | 4323 | free_rsp_buf(resp_buftype, rsp_iov.iov_base); |
05fd5c2c | 4324 | cifs_small_buf_release(req); |
a821df3f | 4325 | return rc == -ENODATA ? 0 : rc; |
eccb4422 | 4326 | } else |
d8d9de53 | 4327 | trace_smb3_read_done(xid, |
351a59da | 4328 | req->PersistentFileId, |
eccb4422 SF |
4329 | io_parms->tcon->tid, ses->Suid, |
4330 | io_parms->offset, io_parms->length); | |
d8e05039 | 4331 | |
088aaf17 Z |
4332 | cifs_small_buf_release(req); |
4333 | ||
a821df3f RS |
4334 | *nbytes = le32_to_cpu(rsp->DataLength); |
4335 | if ((*nbytes > CIFS_MAX_MSGSIZE) || | |
4336 | (*nbytes > io_parms->length)) { | |
4337 | cifs_dbg(FYI, "bad length %d for count %d\n", | |
4338 | *nbytes, io_parms->length); | |
4339 | rc = -EIO; | |
4340 | *nbytes = 0; | |
d8e05039 PS |
4341 | } |
4342 | ||
4343 | if (*buf) { | |
977b6170 | 4344 | memcpy(*buf, (char *)rsp + rsp->DataOffset, *nbytes); |
da502f7d | 4345 | free_rsp_buf(resp_buftype, rsp_iov.iov_base); |
d8e05039 | 4346 | } else if (resp_buftype != CIFS_NO_BUFFER) { |
da502f7d | 4347 | *buf = rsp_iov.iov_base; |
d8e05039 PS |
4348 | if (resp_buftype == CIFS_SMALL_BUFFER) |
4349 | *buf_type = CIFS_SMALL_BUFFER; | |
4350 | else if (resp_buftype == CIFS_LARGE_BUFFER) | |
4351 | *buf_type = CIFS_LARGE_BUFFER; | |
4352 | } | |
4353 | return rc; | |
4354 | } | |
4355 | ||
33319141 PS |
4356 | /* |
4357 | * Check the mid_state and signature on received buffer (if any), and queue the | |
4358 | * workqueue completion task. | |
4359 | */ | |
4360 | static void | |
4361 | smb2_writev_callback(struct mid_q_entry *mid) | |
4362 | { | |
4363 | struct cifs_writedata *wdata = mid->callback_data; | |
4364 | struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink); | |
352d96f3 | 4365 | struct TCP_Server_Info *server = wdata->server; |
33319141 PS |
4366 | unsigned int written; |
4367 | struct smb2_write_rsp *rsp = (struct smb2_write_rsp *)mid->resp_buf; | |
34f4deb7 | 4368 | struct cifs_credits credits = { .value = 0, .instance = 0 }; |
33319141 | 4369 | |
352d96f3 AA |
4370 | WARN_ONCE(wdata->server != mid->server, |
4371 | "wdata server %p != mid server %p", | |
4372 | wdata->server, mid->server); | |
4373 | ||
33319141 PS |
4374 | switch (mid->mid_state) { |
4375 | case MID_RESPONSE_RECEIVED: | |
0d35e382 | 4376 | credits.value = le16_to_cpu(rsp->hdr.CreditRequest); |
34f4deb7 PS |
4377 | credits.instance = server->reconnect_instance; |
4378 | wdata->result = smb2_check_receive(mid, server, 0); | |
33319141 PS |
4379 | if (wdata->result != 0) |
4380 | break; | |
4381 | ||
4382 | written = le32_to_cpu(rsp->DataLength); | |
4383 | /* | |
4384 | * Mask off high 16 bits when bytes written as returned | |
4385 | * by the server is greater than bytes requested by the | |
4386 | * client. OS/2 servers are known to set incorrect | |
4387 | * CountHigh values. | |
4388 | */ | |
4389 | if (written > wdata->bytes) | |
4390 | written &= 0xFFFF; | |
4391 | ||
4392 | if (written < wdata->bytes) | |
4393 | wdata->result = -ENOSPC; | |
4394 | else | |
4395 | wdata->bytes = written; | |
4396 | break; | |
4397 | case MID_REQUEST_SUBMITTED: | |
4398 | case MID_RETRY_NEEDED: | |
4399 | wdata->result = -EAGAIN; | |
4400 | break; | |
0fd1d37b | 4401 | case MID_RESPONSE_MALFORMED: |
0d35e382 | 4402 | credits.value = le16_to_cpu(rsp->hdr.CreditRequest); |
34f4deb7 | 4403 | credits.instance = server->reconnect_instance; |
30b5ae21 | 4404 | fallthrough; |
33319141 PS |
4405 | default: |
4406 | wdata->result = -EIO; | |
4407 | break; | |
4408 | } | |
db223a59 LL |
4409 | #ifdef CONFIG_CIFS_SMB_DIRECT |
4410 | /* | |
4411 | * If this wdata has a memory registered, the MR can be freed | |
4412 | * The number of MRs available is limited, it's important to recover | |
4413 | * used MR as soon as I/O is finished. Hold MR longer in the later | |
4414 | * I/O process can possibly result in I/O deadlock due to lack of MR | |
4415 | * to send request on I/O retry | |
4416 | */ | |
4417 | if (wdata->mr) { | |
4418 | smbd_deregister_mr(wdata->mr); | |
4419 | wdata->mr = NULL; | |
4420 | } | |
4421 | #endif | |
7d42e72f | 4422 | if (wdata->result) { |
33319141 | 4423 | cifs_stats_fail_inc(tcon, SMB2_WRITE_HE); |
7d42e72f PS |
4424 | trace_smb3_write_err(0 /* no xid */, |
4425 | wdata->cfile->fid.persistent_fid, | |
4426 | tcon->tid, tcon->ses->Suid, wdata->offset, | |
4427 | wdata->bytes, wdata->result); | |
d6fd4190 | 4428 | if (wdata->result == -ENOSPC) |
a0a3036b JP |
4429 | pr_warn_once("Out of space writing to %s\n", |
4430 | tcon->treeName); | |
7d42e72f PS |
4431 | } else |
4432 | trace_smb3_write_done(0 /* no xid */, | |
4433 | wdata->cfile->fid.persistent_fid, | |
4434 | tcon->tid, tcon->ses->Suid, | |
4435 | wdata->offset, wdata->bytes); | |
33319141 PS |
4436 | |
4437 | queue_work(cifsiod_wq, &wdata->work); | |
70f08f91 | 4438 | release_mid(mid); |
34f4deb7 | 4439 | add_credits(server, &credits, 0); |
33319141 PS |
4440 | } |
4441 | ||
4442 | /* smb2_async_writev - send an async write, and set up mid to handle result */ | |
4443 | int | |
4a5c80d7 SF |
4444 | smb2_async_writev(struct cifs_writedata *wdata, |
4445 | void (*release)(struct kref *kref)) | |
33319141 | 4446 | { |
cb7e9eab | 4447 | int rc = -EACCES, flags = 0; |
33319141 | 4448 | struct smb2_write_req *req = NULL; |
0d35e382 | 4449 | struct smb2_hdr *shdr; |
33319141 | 4450 | struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink); |
352d96f3 | 4451 | struct TCP_Server_Info *server = wdata->server; |
c713c877 | 4452 | struct kvec iov[1]; |
738f9de5 | 4453 | struct smb_rqst rqst = { }; |
f5688a6d | 4454 | unsigned int total_len; |
33319141 | 4455 | |
352d96f3 AA |
4456 | if (!wdata->server) |
4457 | server = wdata->server = cifs_pick_channel(tcon->ses); | |
4458 | ||
4459 | rc = smb2_plain_req_init(SMB2_WRITE, tcon, server, | |
4460 | (void **) &req, &total_len); | |
f0b93cb9 PS |
4461 | if (rc) |
4462 | return rc; | |
33319141 | 4463 | |
5a77e75f | 4464 | if (smb3_encryption_required(tcon)) |
7fb8986e PS |
4465 | flags |= CIFS_TRANSFORM_REQ; |
4466 | ||
0d35e382 RS |
4467 | shdr = (struct smb2_hdr *)req; |
4468 | shdr->Id.SyncId.ProcessId = cpu_to_le32(wdata->cfile->pid); | |
33319141 | 4469 | |
351a59da PA |
4470 | req->PersistentFileId = wdata->cfile->fid.persistent_fid; |
4471 | req->VolatileFileId = wdata->cfile->fid.volatile_fid; | |
33319141 PS |
4472 | req->WriteChannelInfoOffset = 0; |
4473 | req->WriteChannelInfoLength = 0; | |
4474 | req->Channel = 0; | |
4475 | req->Offset = cpu_to_le64(wdata->offset); | |
33319141 | 4476 | req->DataOffset = cpu_to_le16( |
f5688a6d | 4477 | offsetof(struct smb2_write_req, Buffer)); |
33319141 | 4478 | req->RemainingBytes = 0; |
d323c246 SF |
4479 | |
4480 | trace_smb3_write_enter(0 /* xid */, wdata->cfile->fid.persistent_fid, | |
4481 | tcon->tid, tcon->ses->Suid, wdata->offset, wdata->bytes); | |
db223a59 LL |
4482 | #ifdef CONFIG_CIFS_SMB_DIRECT |
4483 | /* | |
4484 | * If we want to do a server RDMA read, fill in and append | |
4485 | * smbd_buffer_descriptor_v1 to the end of write request | |
4486 | */ | |
bb4c0419 | 4487 | if (server->rdma && !server->sign && wdata->bytes >= |
db223a59 LL |
4488 | server->smbd_conn->rdma_readwrite_threshold) { |
4489 | ||
4490 | struct smbd_buffer_descriptor_v1 *v1; | |
4491 | bool need_invalidate = server->dialect == SMB30_PROT_ID; | |
4492 | ||
4493 | wdata->mr = smbd_register_mr( | |
4494 | server->smbd_conn, wdata->pages, | |
7cf20bce LL |
4495 | wdata->nr_pages, wdata->page_offset, |
4496 | wdata->tailsz, false, need_invalidate); | |
db223a59 | 4497 | if (!wdata->mr) { |
b7972092 | 4498 | rc = -EAGAIN; |
db223a59 LL |
4499 | goto async_writev_out; |
4500 | } | |
4501 | req->Length = 0; | |
4502 | req->DataOffset = 0; | |
7cf20bce LL |
4503 | if (wdata->nr_pages > 1) |
4504 | req->RemainingBytes = | |
4505 | cpu_to_le32( | |
4506 | (wdata->nr_pages - 1) * wdata->pagesz - | |
4507 | wdata->page_offset + wdata->tailsz | |
4508 | ); | |
4509 | else | |
4510 | req->RemainingBytes = cpu_to_le32(wdata->tailsz); | |
db223a59 LL |
4511 | req->Channel = SMB2_CHANNEL_RDMA_V1_INVALIDATE; |
4512 | if (need_invalidate) | |
4513 | req->Channel = SMB2_CHANNEL_RDMA_V1; | |
4514 | req->WriteChannelInfoOffset = | |
2026b06e | 4515 | cpu_to_le16(offsetof(struct smb2_write_req, Buffer)); |
db223a59 | 4516 | req->WriteChannelInfoLength = |
2026b06e | 4517 | cpu_to_le16(sizeof(struct smbd_buffer_descriptor_v1)); |
db223a59 | 4518 | v1 = (struct smbd_buffer_descriptor_v1 *) &req->Buffer[0]; |
2026b06e SF |
4519 | v1->offset = cpu_to_le64(wdata->mr->mr->iova); |
4520 | v1->token = cpu_to_le32(wdata->mr->mr->rkey); | |
4521 | v1->length = cpu_to_le32(wdata->mr->mr->length); | |
db223a59 LL |
4522 | } |
4523 | #endif | |
c713c877 RS |
4524 | iov[0].iov_len = total_len - 1; |
4525 | iov[0].iov_base = (char *)req; | |
33319141 | 4526 | |
738f9de5 | 4527 | rqst.rq_iov = iov; |
c713c877 | 4528 | rqst.rq_nvec = 1; |
eddb079d | 4529 | rqst.rq_pages = wdata->pages; |
57a929a6 | 4530 | rqst.rq_offset = wdata->page_offset; |
eddb079d JL |
4531 | rqst.rq_npages = wdata->nr_pages; |
4532 | rqst.rq_pagesz = wdata->pagesz; | |
4533 | rqst.rq_tailsz = wdata->tailsz; | |
db223a59 LL |
4534 | #ifdef CONFIG_CIFS_SMB_DIRECT |
4535 | if (wdata->mr) { | |
c713c877 | 4536 | iov[0].iov_len += sizeof(struct smbd_buffer_descriptor_v1); |
db223a59 LL |
4537 | rqst.rq_npages = 0; |
4538 | } | |
4539 | #endif | |
f96637be JP |
4540 | cifs_dbg(FYI, "async write at %llu %u bytes\n", |
4541 | wdata->offset, wdata->bytes); | |
33319141 | 4542 | |
db223a59 LL |
4543 | #ifdef CONFIG_CIFS_SMB_DIRECT |
4544 | /* For RDMA read, I/O size is in RemainingBytes not in Length */ | |
4545 | if (!wdata->mr) | |
4546 | req->Length = cpu_to_le32(wdata->bytes); | |
4547 | #else | |
33319141 | 4548 | req->Length = cpu_to_le32(wdata->bytes); |
db223a59 | 4549 | #endif |
33319141 | 4550 | |
335b7b62 | 4551 | if (wdata->credits.value > 0) { |
31473fc4 | 4552 | shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(wdata->bytes, |
cb7e9eab | 4553 | SMB2_MAX_BUFFER_SIZE)); |
88fd98a2 | 4554 | shdr->CreditRequest = cpu_to_le16(le16_to_cpu(shdr->CreditCharge) + 8); |
9a1c67e8 PS |
4555 | |
4556 | rc = adjust_credits(server, &wdata->credits, wdata->bytes); | |
4557 | if (rc) | |
335b7b62 | 4558 | goto async_writev_out; |
9a1c67e8 | 4559 | |
7fb8986e | 4560 | flags |= CIFS_HAS_CREDITS; |
cb7e9eab PS |
4561 | } |
4562 | ||
33319141 | 4563 | kref_get(&wdata->refcount); |
9b7c18a2 | 4564 | rc = cifs_call_async(server, &rqst, NULL, smb2_writev_callback, NULL, |
3349c3a7 | 4565 | wdata, flags, &wdata->credits); |
33319141 | 4566 | |
e5d04887 | 4567 | if (rc) { |
d8d9de53 | 4568 | trace_smb3_write_err(0 /* no xid */, |
351a59da | 4569 | req->PersistentFileId, |
eccb4422 SF |
4570 | tcon->tid, tcon->ses->Suid, wdata->offset, |
4571 | wdata->bytes, rc); | |
4a5c80d7 | 4572 | kref_put(&wdata->refcount, release); |
e5d04887 | 4573 | cifs_stats_fail_inc(tcon, SMB2_WRITE_HE); |
7d42e72f | 4574 | } |
33319141 | 4575 | |
33319141 PS |
4576 | async_writev_out: |
4577 | cifs_small_buf_release(req); | |
33319141 PS |
4578 | return rc; |
4579 | } | |
009d3443 PS |
4580 | |
4581 | /* | |
4582 | * SMB2_write function gets iov pointer to kvec array with n_vec as a length. | |
4583 | * The length field from io_parms must be at least 1 and indicates a number of | |
4584 | * elements with data to write that begins with position 1 in iov array. All | |
4585 | * data length is specified by count. | |
4586 | */ | |
4587 | int | |
4588 | SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms, | |
4589 | unsigned int *nbytes, struct kvec *iov, int n_vec) | |
4590 | { | |
40eff45b | 4591 | struct smb_rqst rqst; |
009d3443 PS |
4592 | int rc = 0; |
4593 | struct smb2_write_req *req = NULL; | |
4594 | struct smb2_write_rsp *rsp = NULL; | |
4595 | int resp_buftype; | |
da502f7d | 4596 | struct kvec rsp_iov; |
7fb8986e | 4597 | int flags = 0; |
f5688a6d | 4598 | unsigned int total_len; |
352d96f3 | 4599 | struct TCP_Server_Info *server; |
da502f7d | 4600 | |
009d3443 PS |
4601 | *nbytes = 0; |
4602 | ||
4603 | if (n_vec < 1) | |
4604 | return rc; | |
4605 | ||
352d96f3 AA |
4606 | if (!io_parms->server) |
4607 | io_parms->server = cifs_pick_channel(io_parms->tcon->ses); | |
4608 | server = io_parms->server; | |
4609 | if (server == NULL) | |
4610 | return -ECONNABORTED; | |
4611 | ||
4612 | rc = smb2_plain_req_init(SMB2_WRITE, io_parms->tcon, server, | |
4613 | (void **) &req, &total_len); | |
009d3443 PS |
4614 | if (rc) |
4615 | return rc; | |
4616 | ||
5a77e75f | 4617 | if (smb3_encryption_required(io_parms->tcon)) |
7fb8986e PS |
4618 | flags |= CIFS_TRANSFORM_REQ; |
4619 | ||
0d35e382 | 4620 | req->hdr.Id.SyncId.ProcessId = cpu_to_le32(io_parms->pid); |
009d3443 | 4621 | |
351a59da PA |
4622 | req->PersistentFileId = io_parms->persistent_fid; |
4623 | req->VolatileFileId = io_parms->volatile_fid; | |
009d3443 PS |
4624 | req->WriteChannelInfoOffset = 0; |
4625 | req->WriteChannelInfoLength = 0; | |
4626 | req->Channel = 0; | |
4627 | req->Length = cpu_to_le32(io_parms->length); | |
4628 | req->Offset = cpu_to_le64(io_parms->offset); | |
009d3443 | 4629 | req->DataOffset = cpu_to_le16( |
f5688a6d | 4630 | offsetof(struct smb2_write_req, Buffer)); |
009d3443 PS |
4631 | req->RemainingBytes = 0; |
4632 | ||
d323c246 SF |
4633 | trace_smb3_write_enter(xid, io_parms->persistent_fid, |
4634 | io_parms->tcon->tid, io_parms->tcon->ses->Suid, | |
4635 | io_parms->offset, io_parms->length); | |
4636 | ||
009d3443 | 4637 | iov[0].iov_base = (char *)req; |
f5688a6d RS |
4638 | /* 1 for Buffer */ |
4639 | iov[0].iov_len = total_len - 1; | |
009d3443 | 4640 | |
40eff45b RS |
4641 | memset(&rqst, 0, sizeof(struct smb_rqst)); |
4642 | rqst.rq_iov = iov; | |
4643 | rqst.rq_nvec = n_vec + 1; | |
4644 | ||
352d96f3 AA |
4645 | rc = cifs_send_recv(xid, io_parms->tcon->ses, server, |
4646 | &rqst, | |
f5688a6d | 4647 | &resp_buftype, flags, &rsp_iov); |
da502f7d | 4648 | rsp = (struct smb2_write_rsp *)rsp_iov.iov_base; |
009d3443 PS |
4649 | |
4650 | if (rc) { | |
d8d9de53 | 4651 | trace_smb3_write_err(xid, |
351a59da | 4652 | req->PersistentFileId, |
eccb4422 SF |
4653 | io_parms->tcon->tid, |
4654 | io_parms->tcon->ses->Suid, | |
4655 | io_parms->offset, io_parms->length, rc); | |
009d3443 | 4656 | cifs_stats_fail_inc(io_parms->tcon, SMB2_WRITE_HE); |
f96637be | 4657 | cifs_dbg(VFS, "Send error in write = %d\n", rc); |
eccb4422 | 4658 | } else { |
009d3443 | 4659 | *nbytes = le32_to_cpu(rsp->DataLength); |
d8d9de53 | 4660 | trace_smb3_write_done(xid, |
351a59da | 4661 | req->PersistentFileId, |
d8d9de53 RS |
4662 | io_parms->tcon->tid, |
4663 | io_parms->tcon->ses->Suid, | |
4664 | io_parms->offset, *nbytes); | |
eccb4422 | 4665 | } |
e5d04887 | 4666 | |
6a3eb336 | 4667 | cifs_small_buf_release(req); |
e5d04887 | 4668 | free_rsp_buf(resp_buftype, rsp); |
009d3443 PS |
4669 | return rc; |
4670 | } | |
35143eb5 | 4671 | |
69dda305 | 4672 | int posix_info_sid_size(const void *beg, const void *end) |
349e13ad AA |
4673 | { |
4674 | size_t subauth; | |
4675 | int total; | |
4676 | ||
4677 | if (beg + 1 > end) | |
4678 | return -1; | |
4679 | ||
4680 | subauth = *(u8 *)(beg+1); | |
4681 | if (subauth < 1 || subauth > 15) | |
4682 | return -1; | |
4683 | ||
4684 | total = 1 + 1 + 6 + 4*subauth; | |
4685 | if (beg + total > end) | |
4686 | return -1; | |
4687 | ||
4688 | return total; | |
4689 | } | |
4690 | ||
4691 | int posix_info_parse(const void *beg, const void *end, | |
4692 | struct smb2_posix_info_parsed *out) | |
4693 | ||
4694 | { | |
4695 | int total_len = 0; | |
ca38fabc | 4696 | int owner_len, group_len; |
349e13ad AA |
4697 | int name_len; |
4698 | const void *owner_sid; | |
4699 | const void *group_sid; | |
4700 | const void *name; | |
4701 | ||
4702 | /* if no end bound given, assume payload to be correct */ | |
4703 | if (!end) { | |
4704 | const struct smb2_posix_info *p = beg; | |
4705 | ||
4706 | end = beg + le32_to_cpu(p->NextEntryOffset); | |
4707 | /* last element will have a 0 offset, pick a sensible bound */ | |
4708 | if (end == beg) | |
4709 | end += 0xFFFF; | |
4710 | } | |
4711 | ||
4712 | /* check base buf */ | |
4713 | if (beg + sizeof(struct smb2_posix_info) > end) | |
4714 | return -1; | |
4715 | total_len = sizeof(struct smb2_posix_info); | |
4716 | ||
4717 | /* check owner sid */ | |
4718 | owner_sid = beg + total_len; | |
ca38fabc RS |
4719 | owner_len = posix_info_sid_size(owner_sid, end); |
4720 | if (owner_len < 0) | |
349e13ad | 4721 | return -1; |
ca38fabc | 4722 | total_len += owner_len; |
349e13ad AA |
4723 | |
4724 | /* check group sid */ | |
4725 | group_sid = beg + total_len; | |
ca38fabc RS |
4726 | group_len = posix_info_sid_size(group_sid, end); |
4727 | if (group_len < 0) | |
349e13ad | 4728 | return -1; |
ca38fabc | 4729 | total_len += group_len; |
349e13ad AA |
4730 | |
4731 | /* check name len */ | |
4732 | if (beg + total_len + 4 > end) | |
4733 | return -1; | |
4734 | name_len = le32_to_cpu(*(__le32 *)(beg + total_len)); | |
4735 | if (name_len < 1 || name_len > 0xFFFF) | |
4736 | return -1; | |
4737 | total_len += 4; | |
4738 | ||
4739 | /* check name */ | |
4740 | name = beg + total_len; | |
4741 | if (name + name_len > end) | |
4742 | return -1; | |
4743 | total_len += name_len; | |
4744 | ||
4745 | if (out) { | |
4746 | out->base = beg; | |
4747 | out->size = total_len; | |
4748 | out->name_len = name_len; | |
4749 | out->name = name; | |
ca38fabc RS |
4750 | memcpy(&out->owner, owner_sid, owner_len); |
4751 | memcpy(&out->group, group_sid, group_len); | |
349e13ad AA |
4752 | } |
4753 | return total_len; | |
4754 | } | |
4755 | ||
4756 | static int posix_info_extra_size(const void *beg, const void *end) | |
4757 | { | |
4758 | int len = posix_info_parse(beg, end, NULL); | |
4759 | ||
4760 | if (len < 0) | |
4761 | return -1; | |
4762 | return len - sizeof(struct smb2_posix_info); | |
4763 | } | |
4764 | ||
d324f08d | 4765 | static unsigned int |
3d519bd1 AA |
4766 | num_entries(int infotype, char *bufstart, char *end_of_buf, char **lastentry, |
4767 | size_t size) | |
d324f08d PS |
4768 | { |
4769 | int len; | |
4770 | unsigned int entrycount = 0; | |
4771 | unsigned int next_offset = 0; | |
56446f21 DC |
4772 | char *entryptr; |
4773 | FILE_DIRECTORY_INFO *dir_info; | |
d324f08d PS |
4774 | |
4775 | if (bufstart == NULL) | |
4776 | return 0; | |
4777 | ||
56446f21 | 4778 | entryptr = bufstart; |
d324f08d PS |
4779 | |
4780 | while (1) { | |
56446f21 DC |
4781 | if (entryptr + next_offset < entryptr || |
4782 | entryptr + next_offset > end_of_buf || | |
4783 | entryptr + next_offset + size > end_of_buf) { | |
f96637be | 4784 | cifs_dbg(VFS, "malformed search entry would overflow\n"); |
d324f08d PS |
4785 | break; |
4786 | } | |
4787 | ||
56446f21 DC |
4788 | entryptr = entryptr + next_offset; |
4789 | dir_info = (FILE_DIRECTORY_INFO *)entryptr; | |
4790 | ||
3d519bd1 AA |
4791 | if (infotype == SMB_FIND_FILE_POSIX_INFO) |
4792 | len = posix_info_extra_size(entryptr, end_of_buf); | |
4793 | else | |
4794 | len = le32_to_cpu(dir_info->FileNameLength); | |
4795 | ||
4796 | if (len < 0 || | |
4797 | entryptr + len < entryptr || | |
56446f21 DC |
4798 | entryptr + len > end_of_buf || |
4799 | entryptr + len + size > end_of_buf) { | |
f96637be JP |
4800 | cifs_dbg(VFS, "directory entry name would overflow frame end of buf %p\n", |
4801 | end_of_buf); | |
d324f08d PS |
4802 | break; |
4803 | } | |
4804 | ||
56446f21 | 4805 | *lastentry = entryptr; |
d324f08d PS |
4806 | entrycount++; |
4807 | ||
56446f21 | 4808 | next_offset = le32_to_cpu(dir_info->NextEntryOffset); |
d324f08d PS |
4809 | if (!next_offset) |
4810 | break; | |
4811 | } | |
4812 | ||
4813 | return entrycount; | |
4814 | } | |
4815 | ||
4816 | /* | |
4817 | * Readdir/FindFirst | |
4818 | */ | |
0a17799c | 4819 | int SMB2_query_directory_init(const unsigned int xid, |
352d96f3 AA |
4820 | struct cifs_tcon *tcon, |
4821 | struct TCP_Server_Info *server, | |
4822 | struct smb_rqst *rqst, | |
0a17799c RS |
4823 | u64 persistent_fid, u64 volatile_fid, |
4824 | int index, int info_level) | |
d324f08d PS |
4825 | { |
4826 | struct smb2_query_directory_req *req; | |
d324f08d | 4827 | unsigned char *bufptr; |
d324f08d | 4828 | __le16 asteriks = cpu_to_le16('*'); |
0a17799c RS |
4829 | unsigned int output_size = CIFSMaxBufSize - |
4830 | MAX_SMB2_CREATE_RESPONSE_SIZE - | |
4831 | MAX_SMB2_CLOSE_RESPONSE_SIZE; | |
7c00c3a6 | 4832 | unsigned int total_len; |
0a17799c RS |
4833 | struct kvec *iov = rqst->rq_iov; |
4834 | int len, rc; | |
d324f08d | 4835 | |
352d96f3 AA |
4836 | rc = smb2_plain_req_init(SMB2_QUERY_DIRECTORY, tcon, server, |
4837 | (void **) &req, &total_len); | |
d324f08d PS |
4838 | if (rc) |
4839 | return rc; | |
4840 | ||
0a17799c | 4841 | switch (info_level) { |
d324f08d PS |
4842 | case SMB_FIND_FILE_DIRECTORY_INFO: |
4843 | req->FileInformationClass = FILE_DIRECTORY_INFORMATION; | |
d324f08d PS |
4844 | break; |
4845 | case SMB_FIND_FILE_ID_FULL_DIR_INFO: | |
4846 | req->FileInformationClass = FILEID_FULL_DIRECTORY_INFORMATION; | |
d324f08d | 4847 | break; |
3d519bd1 AA |
4848 | case SMB_FIND_FILE_POSIX_INFO: |
4849 | req->FileInformationClass = SMB_FIND_FILE_POSIX_INFO; | |
4850 | break; | |
d324f08d | 4851 | default: |
3175eb9b | 4852 | cifs_tcon_dbg(VFS, "info level %u isn't supported\n", |
0a17799c RS |
4853 | info_level); |
4854 | return -EINVAL; | |
d324f08d PS |
4855 | } |
4856 | ||
4857 | req->FileIndex = cpu_to_le32(index); | |
4858 | req->PersistentFileId = persistent_fid; | |
4859 | req->VolatileFileId = volatile_fid; | |
4860 | ||
4861 | len = 0x2; | |
4862 | bufptr = req->Buffer; | |
4863 | memcpy(bufptr, &asteriks, len); | |
4864 | ||
4865 | req->FileNameOffset = | |
7c00c3a6 | 4866 | cpu_to_le16(sizeof(struct smb2_query_directory_req) - 1); |
d324f08d PS |
4867 | req->FileNameLength = cpu_to_le16(len); |
4868 | /* | |
4869 | * BB could be 30 bytes or so longer if we used SMB2 specific | |
4870 | * buffer lengths, but this is safe and close enough. | |
4871 | */ | |
4872 | output_size = min_t(unsigned int, output_size, server->maxBuf); | |
4873 | output_size = min_t(unsigned int, output_size, 2 << 15); | |
4874 | req->OutputBufferLength = cpu_to_le32(output_size); | |
4875 | ||
4876 | iov[0].iov_base = (char *)req; | |
7c00c3a6 RS |
4877 | /* 1 for Buffer */ |
4878 | iov[0].iov_len = total_len - 1; | |
d324f08d PS |
4879 | |
4880 | iov[1].iov_base = (char *)(req->Buffer); | |
4881 | iov[1].iov_len = len; | |
4882 | ||
0a17799c RS |
4883 | trace_smb3_query_dir_enter(xid, persistent_fid, tcon->tid, |
4884 | tcon->ses->Suid, index, output_size); | |
4885 | ||
4886 | return 0; | |
4887 | } | |
4888 | ||
4889 | void SMB2_query_directory_free(struct smb_rqst *rqst) | |
4890 | { | |
4891 | if (rqst && rqst->rq_iov) { | |
4892 | cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */ | |
4893 | } | |
4894 | } | |
4895 | ||
af08f9e7 RS |
4896 | int |
4897 | smb2_parse_query_directory(struct cifs_tcon *tcon, | |
4898 | struct kvec *rsp_iov, | |
4899 | int resp_buftype, | |
4900 | struct cifs_search_info *srch_inf) | |
4901 | { | |
4902 | struct smb2_query_directory_rsp *rsp; | |
4903 | size_t info_buf_size; | |
4904 | char *end_of_smb; | |
4905 | int rc; | |
4906 | ||
4907 | rsp = (struct smb2_query_directory_rsp *)rsp_iov->iov_base; | |
4908 | ||
4909 | switch (srch_inf->info_level) { | |
4910 | case SMB_FIND_FILE_DIRECTORY_INFO: | |
4911 | info_buf_size = sizeof(FILE_DIRECTORY_INFO) - 1; | |
4912 | break; | |
4913 | case SMB_FIND_FILE_ID_FULL_DIR_INFO: | |
4914 | info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO) - 1; | |
4915 | break; | |
3d519bd1 AA |
4916 | case SMB_FIND_FILE_POSIX_INFO: |
4917 | /* note that posix payload are variable size */ | |
4918 | info_buf_size = sizeof(struct smb2_posix_info); | |
4919 | break; | |
af08f9e7 RS |
4920 | default: |
4921 | cifs_tcon_dbg(VFS, "info level %u isn't supported\n", | |
4922 | srch_inf->info_level); | |
4923 | return -EINVAL; | |
4924 | } | |
4925 | ||
4926 | rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset), | |
4927 | le32_to_cpu(rsp->OutputBufferLength), rsp_iov, | |
4928 | info_buf_size); | |
3d519bd1 AA |
4929 | if (rc) { |
4930 | cifs_tcon_dbg(VFS, "bad info payload"); | |
af08f9e7 | 4931 | return rc; |
3d519bd1 | 4932 | } |
af08f9e7 RS |
4933 | |
4934 | srch_inf->unicode = true; | |
4935 | ||
4936 | if (srch_inf->ntwrk_buf_start) { | |
4937 | if (srch_inf->smallBuf) | |
4938 | cifs_small_buf_release(srch_inf->ntwrk_buf_start); | |
4939 | else | |
4940 | cifs_buf_release(srch_inf->ntwrk_buf_start); | |
4941 | } | |
4942 | srch_inf->ntwrk_buf_start = (char *)rsp; | |
4943 | srch_inf->srch_entries_start = srch_inf->last_entry = | |
4944 | (char *)rsp + le16_to_cpu(rsp->OutputBufferOffset); | |
4945 | end_of_smb = rsp_iov->iov_len + (char *)rsp; | |
3d519bd1 AA |
4946 | |
4947 | srch_inf->entries_in_buffer = num_entries( | |
4948 | srch_inf->info_level, | |
4949 | srch_inf->srch_entries_start, | |
4950 | end_of_smb, | |
4951 | &srch_inf->last_entry, | |
4952 | info_buf_size); | |
4953 | ||
af08f9e7 RS |
4954 | srch_inf->index_of_last_entry += srch_inf->entries_in_buffer; |
4955 | cifs_dbg(FYI, "num entries %d last_index %lld srch start %p srch end %p\n", | |
4956 | srch_inf->entries_in_buffer, srch_inf->index_of_last_entry, | |
4957 | srch_inf->srch_entries_start, srch_inf->last_entry); | |
4958 | if (resp_buftype == CIFS_LARGE_BUFFER) | |
4959 | srch_inf->smallBuf = false; | |
4960 | else if (resp_buftype == CIFS_SMALL_BUFFER) | |
4961 | srch_inf->smallBuf = true; | |
4962 | else | |
a0a3036b | 4963 | cifs_tcon_dbg(VFS, "Invalid search buffer type\n"); |
af08f9e7 RS |
4964 | |
4965 | return 0; | |
4966 | } | |
4967 | ||
0a17799c RS |
4968 | int |
4969 | SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon, | |
4970 | u64 persistent_fid, u64 volatile_fid, int index, | |
4971 | struct cifs_search_info *srch_inf) | |
4972 | { | |
4973 | struct smb_rqst rqst; | |
4974 | struct kvec iov[SMB2_QUERY_DIRECTORY_IOV_SIZE]; | |
4975 | struct smb2_query_directory_rsp *rsp = NULL; | |
4976 | int resp_buftype = CIFS_NO_BUFFER; | |
4977 | struct kvec rsp_iov; | |
4978 | int rc = 0; | |
0a17799c | 4979 | struct cifs_ses *ses = tcon->ses; |
352d96f3 | 4980 | struct TCP_Server_Info *server = cifs_pick_channel(ses); |
0a17799c RS |
4981 | int flags = 0; |
4982 | ||
c4985c3d | 4983 | if (!ses || !(ses->server)) |
0a17799c RS |
4984 | return -EIO; |
4985 | ||
4986 | if (smb3_encryption_required(tcon)) | |
4987 | flags |= CIFS_TRANSFORM_REQ; | |
4988 | ||
40eff45b | 4989 | memset(&rqst, 0, sizeof(struct smb_rqst)); |
0a17799c | 4990 | memset(&iov, 0, sizeof(iov)); |
40eff45b | 4991 | rqst.rq_iov = iov; |
0a17799c | 4992 | rqst.rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE; |
40eff45b | 4993 | |
352d96f3 AA |
4994 | rc = SMB2_query_directory_init(xid, tcon, server, |
4995 | &rqst, persistent_fid, | |
0a17799c RS |
4996 | volatile_fid, index, |
4997 | srch_inf->info_level); | |
4998 | if (rc) | |
4999 | goto qdir_exit; | |
d323c246 | 5000 | |
352d96f3 AA |
5001 | rc = cifs_send_recv(xid, ses, server, |
5002 | &rqst, &resp_buftype, flags, &rsp_iov); | |
da502f7d | 5003 | rsp = (struct smb2_query_directory_rsp *)rsp_iov.iov_base; |
e5d04887 | 5004 | |
d324f08d | 5005 | if (rc) { |
31473fc4 | 5006 | if (rc == -ENODATA && |
0d35e382 | 5007 | rsp->hdr.Status == STATUS_NO_MORE_FILES) { |
adb3b4e9 SF |
5008 | trace_smb3_query_dir_done(xid, persistent_fid, |
5009 | tcon->tid, tcon->ses->Suid, index, 0); | |
52755808 PS |
5010 | srch_inf->endOfSearch = true; |
5011 | rc = 0; | |
adb3b4e9 SF |
5012 | } else { |
5013 | trace_smb3_query_dir_err(xid, persistent_fid, tcon->tid, | |
5014 | tcon->ses->Suid, index, 0, rc); | |
8e6e72ae | 5015 | cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE); |
adb3b4e9 | 5016 | } |
d324f08d PS |
5017 | goto qdir_exit; |
5018 | } | |
d324f08d | 5019 | |
af08f9e7 RS |
5020 | rc = smb2_parse_query_directory(tcon, &rsp_iov, resp_buftype, |
5021 | srch_inf); | |
adb3b4e9 SF |
5022 | if (rc) { |
5023 | trace_smb3_query_dir_err(xid, persistent_fid, tcon->tid, | |
5024 | tcon->ses->Suid, index, 0, rc); | |
d324f08d | 5025 | goto qdir_exit; |
adb3b4e9 | 5026 | } |
0a17799c RS |
5027 | resp_buftype = CIFS_NO_BUFFER; |
5028 | ||
adb3b4e9 SF |
5029 | trace_smb3_query_dir_done(xid, persistent_fid, tcon->tid, |
5030 | tcon->ses->Suid, index, srch_inf->entries_in_buffer); | |
d324f08d PS |
5031 | |
5032 | qdir_exit: | |
0a17799c | 5033 | SMB2_query_directory_free(&rqst); |
d324f08d PS |
5034 | free_rsp_buf(resp_buftype, rsp); |
5035 | return rc; | |
5036 | } | |
5037 | ||
ba8ca116 | 5038 | int |
352d96f3 AA |
5039 | SMB2_set_info_init(struct cifs_tcon *tcon, struct TCP_Server_Info *server, |
5040 | struct smb_rqst *rqst, | |
5041 | u64 persistent_fid, u64 volatile_fid, u32 pid, | |
5042 | u8 info_class, u8 info_type, u32 additional_info, | |
5043 | void **data, unsigned int *size) | |
35143eb5 PS |
5044 | { |
5045 | struct smb2_set_info_req *req; | |
ba8ca116 RS |
5046 | struct kvec *iov = rqst->rq_iov; |
5047 | unsigned int i, total_len; | |
5048 | int rc; | |
35143eb5 | 5049 | |
352d96f3 AA |
5050 | rc = smb2_plain_req_init(SMB2_SET_INFO, tcon, server, |
5051 | (void **) &req, &total_len); | |
ba8ca116 | 5052 | if (rc) |
35143eb5 | 5053 | return rc; |
7fb8986e | 5054 | |
0d35e382 | 5055 | req->hdr.Id.SyncId.ProcessId = cpu_to_le32(pid); |
dac95340 | 5056 | req->InfoType = info_type; |
35143eb5 PS |
5057 | req->FileInfoClass = info_class; |
5058 | req->PersistentFileId = persistent_fid; | |
5059 | req->VolatileFileId = volatile_fid; | |
dac95340 | 5060 | req->AdditionalInformation = cpu_to_le32(additional_info); |
35143eb5 | 5061 | |
35143eb5 | 5062 | req->BufferOffset = |
2fc803ef | 5063 | cpu_to_le16(sizeof(struct smb2_set_info_req) - 1); |
35143eb5 PS |
5064 | req->BufferLength = cpu_to_le32(*size); |
5065 | ||
35143eb5 | 5066 | memcpy(req->Buffer, *data, *size); |
2fc803ef | 5067 | total_len += *size; |
35143eb5 PS |
5068 | |
5069 | iov[0].iov_base = (char *)req; | |
2fc803ef RS |
5070 | /* 1 for Buffer */ |
5071 | iov[0].iov_len = total_len - 1; | |
35143eb5 | 5072 | |
ba8ca116 | 5073 | for (i = 1; i < rqst->rq_nvec; i++) { |
35143eb5 PS |
5074 | le32_add_cpu(&req->BufferLength, size[i]); |
5075 | iov[i].iov_base = (char *)data[i]; | |
5076 | iov[i].iov_len = size[i]; | |
5077 | } | |
5078 | ||
ba8ca116 RS |
5079 | return 0; |
5080 | } | |
5081 | ||
5082 | void | |
5083 | SMB2_set_info_free(struct smb_rqst *rqst) | |
5084 | { | |
32a1fb36 RS |
5085 | if (rqst && rqst->rq_iov) |
5086 | cifs_buf_release(rqst->rq_iov[0].iov_base); /* request */ | |
ba8ca116 RS |
5087 | } |
5088 | ||
5089 | static int | |
5090 | send_set_info(const unsigned int xid, struct cifs_tcon *tcon, | |
5091 | u64 persistent_fid, u64 volatile_fid, u32 pid, u8 info_class, | |
5092 | u8 info_type, u32 additional_info, unsigned int num, | |
5093 | void **data, unsigned int *size) | |
5094 | { | |
5095 | struct smb_rqst rqst; | |
5096 | struct smb2_set_info_rsp *rsp = NULL; | |
5097 | struct kvec *iov; | |
5098 | struct kvec rsp_iov; | |
5099 | int rc = 0; | |
5100 | int resp_buftype; | |
5101 | struct cifs_ses *ses = tcon->ses; | |
352d96f3 | 5102 | struct TCP_Server_Info *server = cifs_pick_channel(ses); |
ba8ca116 RS |
5103 | int flags = 0; |
5104 | ||
352d96f3 | 5105 | if (!ses || !server) |
ba8ca116 RS |
5106 | return -EIO; |
5107 | ||
5108 | if (!num) | |
5109 | return -EINVAL; | |
5110 | ||
5111 | if (smb3_encryption_required(tcon)) | |
5112 | flags |= CIFS_TRANSFORM_REQ; | |
5113 | ||
5114 | iov = kmalloc_array(num, sizeof(struct kvec), GFP_KERNEL); | |
5115 | if (!iov) | |
5116 | return -ENOMEM; | |
5117 | ||
40eff45b RS |
5118 | memset(&rqst, 0, sizeof(struct smb_rqst)); |
5119 | rqst.rq_iov = iov; | |
5120 | rqst.rq_nvec = num; | |
5121 | ||
352d96f3 AA |
5122 | rc = SMB2_set_info_init(tcon, server, |
5123 | &rqst, persistent_fid, volatile_fid, pid, | |
ba8ca116 RS |
5124 | info_class, info_type, additional_info, |
5125 | data, size); | |
5126 | if (rc) { | |
5127 | kfree(iov); | |
5128 | return rc; | |
5129 | } | |
5130 | ||
5131 | ||
352d96f3 AA |
5132 | rc = cifs_send_recv(xid, ses, server, |
5133 | &rqst, &resp_buftype, flags, | |
2fc803ef | 5134 | &rsp_iov); |
ba8ca116 | 5135 | SMB2_set_info_free(&rqst); |
da502f7d | 5136 | rsp = (struct smb2_set_info_rsp *)rsp_iov.iov_base; |
35143eb5 | 5137 | |
eccb4422 | 5138 | if (rc != 0) { |
35143eb5 | 5139 | cifs_stats_fail_inc(tcon, SMB2_SET_INFO_HE); |
eccb4422 SF |
5140 | trace_smb3_set_info_err(xid, persistent_fid, tcon->tid, |
5141 | ses->Suid, info_class, (__u32)info_type, rc); | |
5142 | } | |
7d3fb24b | 5143 | |
35143eb5 PS |
5144 | free_rsp_buf(resp_buftype, rsp); |
5145 | kfree(iov); | |
5146 | return rc; | |
5147 | } | |
5148 | ||
c839ff24 PS |
5149 | int |
5150 | SMB2_set_eof(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, | |
3764cbd1 | 5151 | u64 volatile_fid, u32 pid, __le64 *eof) |
c839ff24 PS |
5152 | { |
5153 | struct smb2_file_eof_info info; | |
5154 | void *data; | |
5155 | unsigned int size; | |
5156 | ||
5157 | info.EndOfFile = *eof; | |
5158 | ||
5159 | data = &info; | |
5160 | size = sizeof(struct smb2_file_eof_info); | |
5161 | ||
7c05eae8 SF |
5162 | trace_smb3_set_eof(xid, persistent_fid, tcon->tid, tcon->ses->Suid, le64_to_cpu(*eof)); |
5163 | ||
3764cbd1 | 5164 | return send_set_info(xid, tcon, persistent_fid, volatile_fid, |
dac95340 SP |
5165 | pid, FILE_END_OF_FILE_INFORMATION, SMB2_O_INFO_FILE, |
5166 | 0, 1, &data, &size); | |
c839ff24 | 5167 | } |
1feeaac7 | 5168 | |
dac95340 SP |
5169 | int |
5170 | SMB2_set_acl(const unsigned int xid, struct cifs_tcon *tcon, | |
5171 | u64 persistent_fid, u64 volatile_fid, | |
5172 | struct cifs_ntsd *pnntsd, int pacllen, int aclflag) | |
5173 | { | |
5174 | return send_set_info(xid, tcon, persistent_fid, volatile_fid, | |
5175 | current->tgid, 0, SMB2_O_INFO_SECURITY, aclflag, | |
5176 | 1, (void **)&pnntsd, &pacllen); | |
1feeaac7 | 5177 | } |
983c88a4 | 5178 | |
5517554e RS |
5179 | int |
5180 | SMB2_set_ea(const unsigned int xid, struct cifs_tcon *tcon, | |
5181 | u64 persistent_fid, u64 volatile_fid, | |
5182 | struct smb2_file_full_ea_info *buf, int len) | |
5183 | { | |
5184 | return send_set_info(xid, tcon, persistent_fid, volatile_fid, | |
5185 | current->tgid, FILE_FULL_EA_INFORMATION, SMB2_O_INFO_FILE, | |
5186 | 0, 1, (void **)&buf, &len); | |
5187 | } | |
5188 | ||
983c88a4 PS |
5189 | int |
5190 | SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon, | |
5191 | const u64 persistent_fid, const u64 volatile_fid, | |
5192 | __u8 oplock_level) | |
5193 | { | |
40eff45b | 5194 | struct smb_rqst rqst; |
983c88a4 | 5195 | int rc; |
0d5a288d | 5196 | struct smb2_oplock_break *req = NULL; |
21ad9487 | 5197 | struct cifs_ses *ses = tcon->ses; |
352d96f3 | 5198 | struct TCP_Server_Info *server = cifs_pick_channel(ses); |
7fb8986e | 5199 | int flags = CIFS_OBREAK_OP; |
21ad9487 RS |
5200 | unsigned int total_len; |
5201 | struct kvec iov[1]; | |
5202 | struct kvec rsp_iov; | |
5203 | int resp_buf_type; | |
983c88a4 | 5204 | |
f96637be | 5205 | cifs_dbg(FYI, "SMB2_oplock_break\n"); |
352d96f3 AA |
5206 | rc = smb2_plain_req_init(SMB2_OPLOCK_BREAK, tcon, server, |
5207 | (void **) &req, &total_len); | |
983c88a4 PS |
5208 | if (rc) |
5209 | return rc; | |
5210 | ||
5a77e75f | 5211 | if (smb3_encryption_required(tcon)) |
7fb8986e PS |
5212 | flags |= CIFS_TRANSFORM_REQ; |
5213 | ||
983c88a4 PS |
5214 | req->VolatileFid = volatile_fid; |
5215 | req->PersistentFid = persistent_fid; | |
5216 | req->OplockLevel = oplock_level; | |
0d35e382 | 5217 | req->hdr.CreditRequest = cpu_to_le16(1); |
983c88a4 | 5218 | |
392e1c5d | 5219 | flags |= CIFS_NO_RSP_BUF; |
21ad9487 RS |
5220 | |
5221 | iov[0].iov_base = (char *)req; | |
5222 | iov[0].iov_len = total_len; | |
5223 | ||
40eff45b RS |
5224 | memset(&rqst, 0, sizeof(struct smb_rqst)); |
5225 | rqst.rq_iov = iov; | |
5226 | rqst.rq_nvec = 1; | |
5227 | ||
352d96f3 AA |
5228 | rc = cifs_send_recv(xid, ses, server, |
5229 | &rqst, &resp_buf_type, flags, &rsp_iov); | |
da502f7d | 5230 | cifs_small_buf_release(req); |
983c88a4 PS |
5231 | |
5232 | if (rc) { | |
5233 | cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE); | |
f96637be | 5234 | cifs_dbg(FYI, "Send error in Oplock Break = %d\n", rc); |
983c88a4 PS |
5235 | } |
5236 | ||
5237 | return rc; | |
5238 | } | |
6fc05c25 | 5239 | |
730928c8 RS |
5240 | void |
5241 | smb2_copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info *pfs_inf, | |
5242 | struct kstatfs *kst) | |
6fc05c25 PS |
5243 | { |
5244 | kst->f_bsize = le32_to_cpu(pfs_inf->BytesPerSector) * | |
5245 | le32_to_cpu(pfs_inf->SectorsPerAllocationUnit); | |
5246 | kst->f_blocks = le64_to_cpu(pfs_inf->TotalAllocationUnits); | |
42bec214 SP |
5247 | kst->f_bfree = kst->f_bavail = |
5248 | le64_to_cpu(pfs_inf->CallerAvailableAllocationUnits); | |
6fc05c25 PS |
5249 | return; |
5250 | } | |
5251 | ||
2d304217 SF |
5252 | static void |
5253 | copy_posix_fs_info_to_kstatfs(FILE_SYSTEM_POSIX_INFO *response_data, | |
5254 | struct kstatfs *kst) | |
5255 | { | |
5256 | kst->f_bsize = le32_to_cpu(response_data->BlockSize); | |
5257 | kst->f_blocks = le64_to_cpu(response_data->TotalBlocks); | |
5258 | kst->f_bfree = le64_to_cpu(response_data->BlocksAvail); | |
5259 | if (response_data->UserBlocksAvail == cpu_to_le64(-1)) | |
5260 | kst->f_bavail = kst->f_bfree; | |
5261 | else | |
5262 | kst->f_bavail = le64_to_cpu(response_data->UserBlocksAvail); | |
5263 | if (response_data->TotalFileNodes != cpu_to_le64(-1)) | |
5264 | kst->f_files = le64_to_cpu(response_data->TotalFileNodes); | |
5265 | if (response_data->FreeFileNodes != cpu_to_le64(-1)) | |
5266 | kst->f_ffree = le64_to_cpu(response_data->FreeFileNodes); | |
5267 | ||
5268 | return; | |
5269 | } | |
2d304217 | 5270 | |
6fc05c25 | 5271 | static int |
352d96f3 AA |
5272 | build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon, |
5273 | struct TCP_Server_Info *server, | |
5274 | int level, int outbuf_len, u64 persistent_fid, | |
5275 | u64 volatile_fid) | |
6fc05c25 PS |
5276 | { |
5277 | int rc; | |
5278 | struct smb2_query_info_req *req; | |
b2fb7fec | 5279 | unsigned int total_len; |
6fc05c25 | 5280 | |
f96637be | 5281 | cifs_dbg(FYI, "Query FSInfo level %d\n", level); |
6fc05c25 | 5282 | |
352d96f3 | 5283 | if ((tcon->ses == NULL) || server == NULL) |
6fc05c25 PS |
5284 | return -EIO; |
5285 | ||
352d96f3 AA |
5286 | rc = smb2_plain_req_init(SMB2_QUERY_INFO, tcon, server, |
5287 | (void **) &req, &total_len); | |
6fc05c25 PS |
5288 | if (rc) |
5289 | return rc; | |
5290 | ||
5291 | req->InfoType = SMB2_O_INFO_FILESYSTEM; | |
5292 | req->FileInfoClass = level; | |
5293 | req->PersistentFileId = persistent_fid; | |
5294 | req->VolatileFileId = volatile_fid; | |
b2fb7fec | 5295 | /* 1 for pad */ |
6fc05c25 | 5296 | req->InputBufferOffset = |
b2fb7fec | 5297 | cpu_to_le16(sizeof(struct smb2_query_info_req) - 1); |
6fc05c25 | 5298 | req->OutputBufferLength = cpu_to_le32( |
1fc6ad2f | 5299 | outbuf_len + sizeof(struct smb2_query_info_rsp) - 1); |
6fc05c25 PS |
5300 | |
5301 | iov->iov_base = (char *)req; | |
b2fb7fec | 5302 | iov->iov_len = total_len; |
6fc05c25 PS |
5303 | return 0; |
5304 | } | |
5305 | ||
2d304217 SF |
5306 | int |
5307 | SMB311_posix_qfs_info(const unsigned int xid, struct cifs_tcon *tcon, | |
5308 | u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata) | |
5309 | { | |
5310 | struct smb_rqst rqst; | |
5311 | struct smb2_query_info_rsp *rsp = NULL; | |
5312 | struct kvec iov; | |
5313 | struct kvec rsp_iov; | |
5314 | int rc = 0; | |
5315 | int resp_buftype; | |
5316 | struct cifs_ses *ses = tcon->ses; | |
352d96f3 | 5317 | struct TCP_Server_Info *server = cifs_pick_channel(ses); |
2d304217 SF |
5318 | FILE_SYSTEM_POSIX_INFO *info = NULL; |
5319 | int flags = 0; | |
5320 | ||
352d96f3 AA |
5321 | rc = build_qfs_info_req(&iov, tcon, server, |
5322 | FS_POSIX_INFORMATION, | |
2d304217 SF |
5323 | sizeof(FILE_SYSTEM_POSIX_INFO), |
5324 | persistent_fid, volatile_fid); | |
5325 | if (rc) | |
5326 | return rc; | |
5327 | ||
5328 | if (smb3_encryption_required(tcon)) | |
5329 | flags |= CIFS_TRANSFORM_REQ; | |
5330 | ||
5331 | memset(&rqst, 0, sizeof(struct smb_rqst)); | |
5332 | rqst.rq_iov = &iov; | |
5333 | rqst.rq_nvec = 1; | |
5334 | ||
352d96f3 AA |
5335 | rc = cifs_send_recv(xid, ses, server, |
5336 | &rqst, &resp_buftype, flags, &rsp_iov); | |
2d304217 SF |
5337 | cifs_small_buf_release(iov.iov_base); |
5338 | if (rc) { | |
5339 | cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE); | |
5340 | goto posix_qfsinf_exit; | |
5341 | } | |
5342 | rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; | |
5343 | ||
5344 | info = (FILE_SYSTEM_POSIX_INFO *)( | |
5345 | le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp); | |
730928c8 RS |
5346 | rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset), |
5347 | le32_to_cpu(rsp->OutputBufferLength), &rsp_iov, | |
5348 | sizeof(FILE_SYSTEM_POSIX_INFO)); | |
2d304217 SF |
5349 | if (!rc) |
5350 | copy_posix_fs_info_to_kstatfs(info, fsdata); | |
5351 | ||
5352 | posix_qfsinf_exit: | |
5353 | free_rsp_buf(resp_buftype, rsp_iov.iov_base); | |
5354 | return rc; | |
5355 | } | |
2d304217 | 5356 | |
6fc05c25 PS |
5357 | int |
5358 | SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon, | |
5359 | u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata) | |
5360 | { | |
40eff45b | 5361 | struct smb_rqst rqst; |
6fc05c25 PS |
5362 | struct smb2_query_info_rsp *rsp = NULL; |
5363 | struct kvec iov; | |
da502f7d | 5364 | struct kvec rsp_iov; |
6fc05c25 PS |
5365 | int rc = 0; |
5366 | int resp_buftype; | |
5367 | struct cifs_ses *ses = tcon->ses; | |
352d96f3 | 5368 | struct TCP_Server_Info *server = cifs_pick_channel(ses); |
6fc05c25 | 5369 | struct smb2_fs_full_size_info *info = NULL; |
7fb8986e | 5370 | int flags = 0; |
6fc05c25 | 5371 | |
352d96f3 AA |
5372 | rc = build_qfs_info_req(&iov, tcon, server, |
5373 | FS_FULL_SIZE_INFORMATION, | |
6fc05c25 PS |
5374 | sizeof(struct smb2_fs_full_size_info), |
5375 | persistent_fid, volatile_fid); | |
5376 | if (rc) | |
5377 | return rc; | |
5378 | ||
5a77e75f | 5379 | if (smb3_encryption_required(tcon)) |
7fb8986e PS |
5380 | flags |= CIFS_TRANSFORM_REQ; |
5381 | ||
40eff45b RS |
5382 | memset(&rqst, 0, sizeof(struct smb_rqst)); |
5383 | rqst.rq_iov = &iov; | |
5384 | rqst.rq_nvec = 1; | |
5385 | ||
352d96f3 AA |
5386 | rc = cifs_send_recv(xid, ses, server, |
5387 | &rqst, &resp_buftype, flags, &rsp_iov); | |
da502f7d | 5388 | cifs_small_buf_release(iov.iov_base); |
6fc05c25 PS |
5389 | if (rc) { |
5390 | cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE); | |
34f62640 | 5391 | goto qfsinf_exit; |
6fc05c25 | 5392 | } |
da502f7d | 5393 | rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; |
6fc05c25 | 5394 | |
1fc6ad2f | 5395 | info = (struct smb2_fs_full_size_info *)( |
49f466bd | 5396 | le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp); |
730928c8 RS |
5397 | rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset), |
5398 | le32_to_cpu(rsp->OutputBufferLength), &rsp_iov, | |
5399 | sizeof(struct smb2_fs_full_size_info)); | |
6fc05c25 | 5400 | if (!rc) |
730928c8 | 5401 | smb2_copy_fs_info_to_kstatfs(info, fsdata); |
6fc05c25 | 5402 | |
34f62640 | 5403 | qfsinf_exit: |
da502f7d | 5404 | free_rsp_buf(resp_buftype, rsp_iov.iov_base); |
34f62640 SF |
5405 | return rc; |
5406 | } | |
5407 | ||
5408 | int | |
5409 | SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon, | |
2167114c | 5410 | u64 persistent_fid, u64 volatile_fid, int level) |
34f62640 | 5411 | { |
40eff45b | 5412 | struct smb_rqst rqst; |
34f62640 SF |
5413 | struct smb2_query_info_rsp *rsp = NULL; |
5414 | struct kvec iov; | |
da502f7d | 5415 | struct kvec rsp_iov; |
34f62640 | 5416 | int rc = 0; |
2167114c | 5417 | int resp_buftype, max_len, min_len; |
34f62640 | 5418 | struct cifs_ses *ses = tcon->ses; |
352d96f3 | 5419 | struct TCP_Server_Info *server = cifs_pick_channel(ses); |
34f62640 | 5420 | unsigned int rsp_len, offset; |
7fb8986e | 5421 | int flags = 0; |
34f62640 | 5422 | |
2167114c SF |
5423 | if (level == FS_DEVICE_INFORMATION) { |
5424 | max_len = sizeof(FILE_SYSTEM_DEVICE_INFO); | |
5425 | min_len = sizeof(FILE_SYSTEM_DEVICE_INFO); | |
5426 | } else if (level == FS_ATTRIBUTE_INFORMATION) { | |
5427 | max_len = sizeof(FILE_SYSTEM_ATTRIBUTE_INFO); | |
5428 | min_len = MIN_FS_ATTR_INFO_SIZE; | |
af6a12ea SF |
5429 | } else if (level == FS_SECTOR_SIZE_INFORMATION) { |
5430 | max_len = sizeof(struct smb3_fs_ss_info); | |
5431 | min_len = sizeof(struct smb3_fs_ss_info); | |
21ba3845 SF |
5432 | } else if (level == FS_VOLUME_INFORMATION) { |
5433 | max_len = sizeof(struct smb3_fs_vol_info) + MAX_VOL_LABEL_LEN; | |
5434 | min_len = sizeof(struct smb3_fs_vol_info); | |
2167114c | 5435 | } else { |
af6a12ea | 5436 | cifs_dbg(FYI, "Invalid qfsinfo level %d\n", level); |
2167114c SF |
5437 | return -EINVAL; |
5438 | } | |
5439 | ||
352d96f3 AA |
5440 | rc = build_qfs_info_req(&iov, tcon, server, |
5441 | level, max_len, | |
34f62640 SF |
5442 | persistent_fid, volatile_fid); |
5443 | if (rc) | |
5444 | return rc; | |
5445 | ||
5a77e75f | 5446 | if (smb3_encryption_required(tcon)) |
7fb8986e PS |
5447 | flags |= CIFS_TRANSFORM_REQ; |
5448 | ||
40eff45b RS |
5449 | memset(&rqst, 0, sizeof(struct smb_rqst)); |
5450 | rqst.rq_iov = &iov; | |
5451 | rqst.rq_nvec = 1; | |
5452 | ||
352d96f3 AA |
5453 | rc = cifs_send_recv(xid, ses, server, |
5454 | &rqst, &resp_buftype, flags, &rsp_iov); | |
da502f7d | 5455 | cifs_small_buf_release(iov.iov_base); |
34f62640 SF |
5456 | if (rc) { |
5457 | cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE); | |
5458 | goto qfsattr_exit; | |
5459 | } | |
da502f7d | 5460 | rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; |
34f62640 SF |
5461 | |
5462 | rsp_len = le32_to_cpu(rsp->OutputBufferLength); | |
5463 | offset = le16_to_cpu(rsp->OutputBufferOffset); | |
730928c8 | 5464 | rc = smb2_validate_iov(offset, rsp_len, &rsp_iov, min_len); |
2167114c SF |
5465 | if (rc) |
5466 | goto qfsattr_exit; | |
5467 | ||
5468 | if (level == FS_ATTRIBUTE_INFORMATION) | |
1fc6ad2f | 5469 | memcpy(&tcon->fsAttrInfo, offset |
49f466bd | 5470 | + (char *)rsp, min_t(unsigned int, |
2167114c SF |
5471 | rsp_len, max_len)); |
5472 | else if (level == FS_DEVICE_INFORMATION) | |
1fc6ad2f | 5473 | memcpy(&tcon->fsDevInfo, offset |
49f466bd | 5474 | + (char *)rsp, sizeof(FILE_SYSTEM_DEVICE_INFO)); |
af6a12ea SF |
5475 | else if (level == FS_SECTOR_SIZE_INFORMATION) { |
5476 | struct smb3_fs_ss_info *ss_info = (struct smb3_fs_ss_info *) | |
1fc6ad2f | 5477 | (offset + (char *)rsp); |
af6a12ea SF |
5478 | tcon->ss_flags = le32_to_cpu(ss_info->Flags); |
5479 | tcon->perf_sector_size = | |
5480 | le32_to_cpu(ss_info->PhysicalBytesPerSectorForPerf); | |
21ba3845 SF |
5481 | } else if (level == FS_VOLUME_INFORMATION) { |
5482 | struct smb3_fs_vol_info *vol_info = (struct smb3_fs_vol_info *) | |
5483 | (offset + (char *)rsp); | |
5484 | tcon->vol_serial_number = vol_info->VolumeSerialNumber; | |
5485 | tcon->vol_create_time = vol_info->VolumeCreationTime; | |
af6a12ea | 5486 | } |
34f62640 SF |
5487 | |
5488 | qfsattr_exit: | |
da502f7d | 5489 | free_rsp_buf(resp_buftype, rsp_iov.iov_base); |
6fc05c25 PS |
5490 | return rc; |
5491 | } | |
f7ba7fe6 PS |
5492 | |
5493 | int | |
5494 | smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon, | |
5495 | const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid, | |
5496 | const __u32 num_lock, struct smb2_lock_element *buf) | |
5497 | { | |
40eff45b | 5498 | struct smb_rqst rqst; |
f7ba7fe6 PS |
5499 | int rc = 0; |
5500 | struct smb2_lock_req *req = NULL; | |
5501 | struct kvec iov[2]; | |
da502f7d | 5502 | struct kvec rsp_iov; |
f7ba7fe6 PS |
5503 | int resp_buf_type; |
5504 | unsigned int count; | |
392e1c5d | 5505 | int flags = CIFS_NO_RSP_BUF; |
ced93679 | 5506 | unsigned int total_len; |
352d96f3 | 5507 | struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses); |
f7ba7fe6 | 5508 | |
f96637be | 5509 | cifs_dbg(FYI, "smb2_lockv num lock %d\n", num_lock); |
f7ba7fe6 | 5510 | |
352d96f3 AA |
5511 | rc = smb2_plain_req_init(SMB2_LOCK, tcon, server, |
5512 | (void **) &req, &total_len); | |
f7ba7fe6 PS |
5513 | if (rc) |
5514 | return rc; | |
5515 | ||
5a77e75f | 5516 | if (smb3_encryption_required(tcon)) |
7fb8986e PS |
5517 | flags |= CIFS_TRANSFORM_REQ; |
5518 | ||
0d35e382 | 5519 | req->hdr.Id.SyncId.ProcessId = cpu_to_le32(pid); |
f7ba7fe6 PS |
5520 | req->LockCount = cpu_to_le16(num_lock); |
5521 | ||
5522 | req->PersistentFileId = persist_fid; | |
5523 | req->VolatileFileId = volatile_fid; | |
5524 | ||
5525 | count = num_lock * sizeof(struct smb2_lock_element); | |
f7ba7fe6 PS |
5526 | |
5527 | iov[0].iov_base = (char *)req; | |
ced93679 | 5528 | iov[0].iov_len = total_len - sizeof(struct smb2_lock_element); |
f7ba7fe6 PS |
5529 | iov[1].iov_base = (char *)buf; |
5530 | iov[1].iov_len = count; | |
5531 | ||
5532 | cifs_stats_inc(&tcon->stats.cifs_stats.num_locks); | |
40eff45b RS |
5533 | |
5534 | memset(&rqst, 0, sizeof(struct smb_rqst)); | |
5535 | rqst.rq_iov = iov; | |
5536 | rqst.rq_nvec = 2; | |
5537 | ||
352d96f3 AA |
5538 | rc = cifs_send_recv(xid, tcon->ses, server, |
5539 | &rqst, &resp_buf_type, flags, | |
ced93679 | 5540 | &rsp_iov); |
da502f7d | 5541 | cifs_small_buf_release(req); |
f7ba7fe6 | 5542 | if (rc) { |
f96637be | 5543 | cifs_dbg(FYI, "Send error in smb2_lockv = %d\n", rc); |
f7ba7fe6 | 5544 | cifs_stats_fail_inc(tcon, SMB2_LOCK_HE); |
eccb4422 SF |
5545 | trace_smb3_lock_err(xid, persist_fid, tcon->tid, |
5546 | tcon->ses->Suid, rc); | |
f7ba7fe6 PS |
5547 | } |
5548 | ||
5549 | return rc; | |
5550 | } | |
5551 | ||
5552 | int | |
5553 | SMB2_lock(const unsigned int xid, struct cifs_tcon *tcon, | |
5554 | const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid, | |
5555 | const __u64 length, const __u64 offset, const __u32 lock_flags, | |
5556 | const bool wait) | |
5557 | { | |
5558 | struct smb2_lock_element lock; | |
5559 | ||
5560 | lock.Offset = cpu_to_le64(offset); | |
5561 | lock.Length = cpu_to_le64(length); | |
5562 | lock.Flags = cpu_to_le32(lock_flags); | |
5563 | if (!wait && lock_flags != SMB2_LOCKFLAG_UNLOCK) | |
5564 | lock.Flags |= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY); | |
5565 | ||
5566 | return smb2_lockv(xid, tcon, persist_fid, volatile_fid, pid, 1, &lock); | |
5567 | } | |
0822f514 PS |
5568 | |
5569 | int | |
5570 | SMB2_lease_break(const unsigned int xid, struct cifs_tcon *tcon, | |
5571 | __u8 *lease_key, const __le32 lease_state) | |
5572 | { | |
40eff45b | 5573 | struct smb_rqst rqst; |
0822f514 PS |
5574 | int rc; |
5575 | struct smb2_lease_ack *req = NULL; | |
8eb7998e | 5576 | struct cifs_ses *ses = tcon->ses; |
7fb8986e | 5577 | int flags = CIFS_OBREAK_OP; |
8eb7998e RS |
5578 | unsigned int total_len; |
5579 | struct kvec iov[1]; | |
5580 | struct kvec rsp_iov; | |
5581 | int resp_buf_type; | |
179e44d4 SF |
5582 | __u64 *please_key_high; |
5583 | __u64 *please_key_low; | |
352d96f3 | 5584 | struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses); |
0822f514 | 5585 | |
f96637be | 5586 | cifs_dbg(FYI, "SMB2_lease_break\n"); |
352d96f3 AA |
5587 | rc = smb2_plain_req_init(SMB2_OPLOCK_BREAK, tcon, server, |
5588 | (void **) &req, &total_len); | |
0822f514 PS |
5589 | if (rc) |
5590 | return rc; | |
5591 | ||
5a77e75f | 5592 | if (smb3_encryption_required(tcon)) |
7fb8986e PS |
5593 | flags |= CIFS_TRANSFORM_REQ; |
5594 | ||
0d35e382 | 5595 | req->hdr.CreditRequest = cpu_to_le16(1); |
0822f514 | 5596 | req->StructureSize = cpu_to_le16(36); |
8eb7998e | 5597 | total_len += 12; |
0822f514 PS |
5598 | |
5599 | memcpy(req->LeaseKey, lease_key, 16); | |
5600 | req->LeaseState = lease_state; | |
5601 | ||
392e1c5d | 5602 | flags |= CIFS_NO_RSP_BUF; |
8eb7998e RS |
5603 | |
5604 | iov[0].iov_base = (char *)req; | |
5605 | iov[0].iov_len = total_len; | |
5606 | ||
40eff45b RS |
5607 | memset(&rqst, 0, sizeof(struct smb_rqst)); |
5608 | rqst.rq_iov = iov; | |
5609 | rqst.rq_nvec = 1; | |
5610 | ||
352d96f3 AA |
5611 | rc = cifs_send_recv(xid, ses, server, |
5612 | &rqst, &resp_buf_type, flags, &rsp_iov); | |
da502f7d | 5613 | cifs_small_buf_release(req); |
0822f514 | 5614 | |
d339adc1 AA |
5615 | please_key_low = (__u64 *)lease_key; |
5616 | please_key_high = (__u64 *)(lease_key+8); | |
0822f514 PS |
5617 | if (rc) { |
5618 | cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE); | |
179e44d4 SF |
5619 | trace_smb3_lease_err(le32_to_cpu(lease_state), tcon->tid, |
5620 | ses->Suid, *please_key_low, *please_key_high, rc); | |
f96637be | 5621 | cifs_dbg(FYI, "Send error in Lease Break = %d\n", rc); |
179e44d4 SF |
5622 | } else |
5623 | trace_smb3_lease_done(le32_to_cpu(lease_state), tcon->tid, | |
5624 | ses->Suid, *please_key_low, *please_key_high); | |
0822f514 PS |
5625 | |
5626 | return rc; | |
5627 | } |