Commit | Line | Data |
---|---|---|
929be906 | 1 | // SPDX-License-Identifier: LGPL-2.1 |
ec2e4523 | 2 | /* |
ec2e4523 | 3 | * |
2b80d049 | 4 | * Copyright (C) International Business Machines Corp., 2009, 2013 |
ec2e4523 PS |
5 | * Etersoft, 2012 |
6 | * Author(s): Steve French (sfrench@us.ibm.com) | |
7 | * Pavel Shilovsky (pshilovsky@samba.org) 2012 | |
8 | * | |
9 | * Contains the routines for constructing the SMB2 PDUs themselves | |
10 | * | |
ec2e4523 PS |
11 | */ |
12 | ||
13 | /* SMB2 PDU handling routines here - except for leftovers (eg session setup) */ | |
14 | /* Note that there are handle based routines which must be */ | |
15 | /* treated slightly differently for reconnection purposes since we never */ | |
16 | /* want to reuse a stale file handle and only the caller knows the file info */ | |
17 | ||
18 | #include <linux/fs.h> | |
19 | #include <linux/kernel.h> | |
20 | #include <linux/vfs.h> | |
09a4707e | 21 | #include <linux/task_io_accounting_ops.h> |
ec2e4523 | 22 | #include <linux/uaccess.h> |
c6e970a0 | 23 | #include <linux/uuid.h> |
33319141 | 24 | #include <linux/pagemap.h> |
ec2e4523 | 25 | #include <linux/xattr.h> |
ec2e4523 PS |
26 | #include "cifsglob.h" |
27 | #include "cifsacl.h" | |
28 | #include "cifsproto.h" | |
29 | #include "smb2proto.h" | |
30 | #include "cifs_unicode.h" | |
31 | #include "cifs_debug.h" | |
32 | #include "ntlmssp.h" | |
33 | #include "smb2status.h" | |
09a4707e | 34 | #include "smb2glob.h" |
d324f08d | 35 | #include "cifspdu.h" |
ceb1b0b9 | 36 | #include "cifs_spnego.h" |
db223a59 | 37 | #include "smbdirect.h" |
eccb4422 | 38 | #include "trace.h" |
a3a53b76 PA |
39 | #ifdef CONFIG_CIFS_DFS_UPCALL |
40 | #include "dfs_cache.h" | |
41 | #endif | |
ec2e4523 PS |
42 | |
43 | /* | |
44 | * The following table defines the expected "StructureSize" of SMB2 requests | |
45 | * in order by SMB2 command. This is similar to "wct" in SMB/CIFS requests. | |
46 | * | |
47 | * Note that commands are defined in smb2pdu.h in le16 but the array below is | |
48 | * indexed by command in host byte order. | |
49 | */ | |
50 | static const int smb2_req_struct_sizes[NUMBER_OF_SMB2_COMMANDS] = { | |
51 | /* SMB2_NEGOTIATE */ 36, | |
52 | /* SMB2_SESSION_SETUP */ 25, | |
53 | /* SMB2_LOGOFF */ 4, | |
54 | /* SMB2_TREE_CONNECT */ 9, | |
55 | /* SMB2_TREE_DISCONNECT */ 4, | |
56 | /* SMB2_CREATE */ 57, | |
57 | /* SMB2_CLOSE */ 24, | |
58 | /* SMB2_FLUSH */ 24, | |
59 | /* SMB2_READ */ 49, | |
60 | /* SMB2_WRITE */ 49, | |
61 | /* SMB2_LOCK */ 48, | |
62 | /* SMB2_IOCTL */ 57, | |
63 | /* SMB2_CANCEL */ 4, | |
64 | /* SMB2_ECHO */ 4, | |
65 | /* SMB2_QUERY_DIRECTORY */ 33, | |
66 | /* SMB2_CHANGE_NOTIFY */ 32, | |
67 | /* SMB2_QUERY_INFO */ 41, | |
68 | /* SMB2_SET_INFO */ 33, | |
69 | /* SMB2_OPLOCK_BREAK */ 24 /* BB this is 36 for LEASE_BREAK variant */ | |
70 | }; | |
71 | ||
730928c8 | 72 | int smb3_encryption_required(const struct cifs_tcon *tcon) |
7fb8986e | 73 | { |
edb16135 | 74 | if (!tcon || !tcon->ses) |
ae6f8dd4 | 75 | return 0; |
7fb8986e PS |
76 | if ((tcon->ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) || |
77 | (tcon->share_flags & SHI1005_FLAGS_ENCRYPT_DATA)) | |
78 | return 1; | |
ae6f8dd4 PS |
79 | if (tcon->seal && |
80 | (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION)) | |
81 | return 1; | |
7fb8986e PS |
82 | return 0; |
83 | } | |
ec2e4523 PS |
84 | |
85 | static void | |
0d35e382 | 86 | smb2_hdr_assemble(struct smb2_hdr *shdr, __le16 smb2_cmd, |
352d96f3 AA |
87 | const struct cifs_tcon *tcon, |
88 | struct TCP_Server_Info *server) | |
ec2e4523 | 89 | { |
31473fc4 PS |
90 | shdr->ProtocolId = SMB2_PROTO_NUMBER; |
91 | shdr->StructureSize = cpu_to_le16(64); | |
92 | shdr->Command = smb2_cmd; | |
352d96f3 | 93 | if (server) { |
7d414f39 | 94 | spin_lock(&server->req_lock); |
69dc4b18 | 95 | /* Request up to 10 credits but don't go over the limit. */ |
141891f4 | 96 | if (server->credits >= server->max_credits) |
31473fc4 | 97 | shdr->CreditRequest = cpu_to_le16(0); |
7d414f39 | 98 | else |
31473fc4 | 99 | shdr->CreditRequest = cpu_to_le16( |
141891f4 | 100 | min_t(int, server->max_credits - |
69dc4b18 | 101 | server->credits, 10)); |
7d414f39 RL |
102 | spin_unlock(&server->req_lock); |
103 | } else { | |
31473fc4 | 104 | shdr->CreditRequest = cpu_to_le16(2); |
7d414f39 | 105 | } |
0d35e382 | 106 | shdr->Id.SyncId.ProcessId = cpu_to_le32((__u16)current->tgid); |
ec2e4523 PS |
107 | |
108 | if (!tcon) | |
109 | goto out; | |
110 | ||
2b80d049 SF |
111 | /* GLOBAL_CAP_LARGE_MTU will only be set if dialect > SMB2.02 */ |
112 | /* See sections 2.2.4 and 3.2.4.1.5 of MS-SMB2 */ | |
352d96f3 | 113 | if (server && (server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) |
31473fc4 | 114 | shdr->CreditCharge = cpu_to_le16(1); |
2b80d049 SF |
115 | /* else CreditCharge MBZ */ |
116 | ||
0d35e382 | 117 | shdr->Id.SyncId.TreeId = cpu_to_le32(tcon->tid); |
ec2e4523 PS |
118 | /* Uid is not converted */ |
119 | if (tcon->ses) | |
0d35e382 | 120 | shdr->SessionId = cpu_to_le64(tcon->ses->Suid); |
f87ab88b SF |
121 | |
122 | /* | |
123 | * If we would set SMB2_FLAGS_DFS_OPERATIONS on open we also would have | |
124 | * to pass the path on the Open SMB prefixed by \\server\share. | |
125 | * Not sure when we would need to do the augmented path (if ever) and | |
126 | * setting this flag breaks the SMB2 open operation since it is | |
127 | * illegal to send an empty path name (without \\server\share prefix) | |
128 | * when the DFS flag is set in the SMB open header. We could | |
129 | * consider setting the flag on all operations other than open | |
130 | * but it is safer to net set it for now. | |
131 | */ | |
132 | /* if (tcon->share_flags & SHI1005_FLAGS_DFS) | |
31473fc4 | 133 | shdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS; */ |
f87ab88b | 134 | |
352d96f3 | 135 | if (server && server->sign && !smb3_encryption_required(tcon)) |
31473fc4 | 136 | shdr->Flags |= SMB2_FLAGS_SIGNED; |
ec2e4523 | 137 | out: |
ec2e4523 PS |
138 | return; |
139 | } | |
140 | ||
141 | static int | |
352d96f3 AA |
142 | smb2_reconnect(__le16 smb2_command, struct cifs_tcon *tcon, |
143 | struct TCP_Server_Info *server) | |
ec2e4523 | 144 | { |
350f4a56 | 145 | int rc = 0; |
aa24d1e9 PS |
146 | struct nls_table *nls_codepage; |
147 | struct cifs_ses *ses; | |
a3a53b76 | 148 | int retries; |
aa24d1e9 PS |
149 | |
150 | /* | |
151 | * SMB2s NegProt, SessSetup, Logoff do not have tcon yet so | |
152 | * check for tcp and smb session status done differently | |
153 | * for those three - in the calling routine. | |
154 | */ | |
155 | if (tcon == NULL) | |
7ffbe655 | 156 | return 0; |
aa24d1e9 | 157 | |
c88f7dcd PA |
158 | /* |
159 | * Need to also skip SMB2_IOCTL because it is used for checking nested dfs links in | |
160 | * cifs_tree_connect(). | |
161 | */ | |
162 | if (smb2_command == SMB2_TREE_CONNECT || smb2_command == SMB2_IOCTL) | |
7ffbe655 | 163 | return 0; |
aa24d1e9 | 164 | |
d7d7a66a | 165 | spin_lock(&tcon->tc_lock); |
fdf59eb5 | 166 | if (tcon->status == TID_EXITING) { |
aa24d1e9 PS |
167 | /* |
168 | * only tree disconnect, open, and write, | |
169 | * (and ulogoff which does not have tcon) | |
170 | * are allowed as we start force umount. | |
171 | */ | |
172 | if ((smb2_command != SMB2_WRITE) && | |
173 | (smb2_command != SMB2_CREATE) && | |
174 | (smb2_command != SMB2_TREE_DISCONNECT)) { | |
d7d7a66a | 175 | spin_unlock(&tcon->tc_lock); |
f96637be JP |
176 | cifs_dbg(FYI, "can not send cmd %d while umounting\n", |
177 | smb2_command); | |
aa24d1e9 PS |
178 | return -ENODEV; |
179 | } | |
180 | } | |
d7d7a66a | 181 | spin_unlock(&tcon->tc_lock); |
dd3cd870 | 182 | if ((!tcon->ses) || (tcon->ses->ses_status == SES_EXITING) || |
352d96f3 | 183 | (!tcon->ses->server) || !server) |
aa24d1e9 PS |
184 | return -EIO; |
185 | ||
186 | ses = tcon->ses; | |
a3a53b76 PA |
187 | retries = server->nr_targets; |
188 | ||
aa24d1e9 | 189 | /* |
a3a53b76 PA |
190 | * Give demultiplex thread up to 10 seconds to each target available for |
191 | * reconnect -- should be greater than cifs socket timeout which is 7 | |
192 | * seconds. | |
aa24d1e9 PS |
193 | */ |
194 | while (server->tcpStatus == CifsNeedReconnect) { | |
195 | /* | |
196 | * Return to caller for TREE_DISCONNECT and LOGOFF and CLOSE | |
197 | * here since they are implicitly done when session drops. | |
198 | */ | |
199 | switch (smb2_command) { | |
200 | /* | |
201 | * BB Should we keep oplock break and add flush to exceptions? | |
202 | */ | |
203 | case SMB2_TREE_DISCONNECT: | |
204 | case SMB2_CANCEL: | |
205 | case SMB2_CLOSE: | |
206 | case SMB2_OPLOCK_BREAK: | |
207 | return -EAGAIN; | |
208 | } | |
209 | ||
7ffbe655 PA |
210 | rc = wait_event_interruptible_timeout(server->response_q, |
211 | (server->tcpStatus != CifsNeedReconnect), | |
212 | 10 * HZ); | |
213 | if (rc < 0) { | |
a0a3036b JP |
214 | cifs_dbg(FYI, "%s: aborting reconnect due to a received signal by the process\n", |
215 | __func__); | |
7ffbe655 PA |
216 | return -ERESTARTSYS; |
217 | } | |
aa24d1e9 PS |
218 | |
219 | /* are we still trying to reconnect? */ | |
d7d7a66a | 220 | spin_lock(&server->srv_lock); |
080dc5e5 | 221 | if (server->tcpStatus != CifsNeedReconnect) { |
d7d7a66a | 222 | spin_unlock(&server->srv_lock); |
aa24d1e9 | 223 | break; |
080dc5e5 | 224 | } |
d7d7a66a | 225 | spin_unlock(&server->srv_lock); |
aa24d1e9 | 226 | |
c54849dd | 227 | if (retries && --retries) |
a3a53b76 PA |
228 | continue; |
229 | ||
aa24d1e9 PS |
230 | /* |
231 | * on "soft" mounts we wait once. Hard mounts keep | |
232 | * retrying until process is killed or server comes | |
233 | * back on-line | |
234 | */ | |
235 | if (!tcon->retry) { | |
f96637be | 236 | cifs_dbg(FYI, "gave up waiting on reconnect in smb_init\n"); |
aa24d1e9 PS |
237 | return -EHOSTDOWN; |
238 | } | |
a3a53b76 | 239 | retries = server->nr_targets; |
aa24d1e9 PS |
240 | } |
241 | ||
d1a931ce SP |
242 | spin_lock(&ses->chan_lock); |
243 | if (!cifs_chan_needs_reconnect(ses, server) && !tcon->need_reconnect) { | |
244 | spin_unlock(&ses->chan_lock); | |
7ffbe655 | 245 | return 0; |
d1a931ce | 246 | } |
88b024f5 | 247 | spin_unlock(&ses->chan_lock); |
d1a931ce SP |
248 | cifs_dbg(FYI, "sess reconnect mask: 0x%lx, tcon reconnect: %d", |
249 | tcon->ses->chans_need_reconnect, | |
250 | tcon->need_reconnect); | |
aa24d1e9 PS |
251 | |
252 | nls_codepage = load_nls_default(); | |
253 | ||
76e75270 SC |
254 | /* |
255 | * Recheck after acquire mutex. If another thread is negotiating | |
256 | * and the server never sends an answer the socket will be closed | |
257 | * and tcpStatus set to reconnect. | |
258 | */ | |
d7d7a66a | 259 | spin_lock(&server->srv_lock); |
76e75270 | 260 | if (server->tcpStatus == CifsNeedReconnect) { |
d7d7a66a | 261 | spin_unlock(&server->srv_lock); |
76e75270 | 262 | rc = -EHOSTDOWN; |
76e75270 SC |
263 | goto out; |
264 | } | |
d7d7a66a | 265 | spin_unlock(&server->srv_lock); |
76e75270 | 266 | |
d1a931ce SP |
267 | /* |
268 | * need to prevent multiple threads trying to simultaneously | |
269 | * reconnect the same SMB session | |
270 | */ | |
271 | spin_lock(&ses->chan_lock); | |
272 | if (!cifs_chan_needs_reconnect(ses, server)) { | |
273 | spin_unlock(&ses->chan_lock); | |
274 | ||
f486ef8e | 275 | /* this means that we only need to tree connect */ |
d1a931ce SP |
276 | if (tcon->need_reconnect) |
277 | goto skip_sess_setup; | |
278 | ||
d1a931ce SP |
279 | goto out; |
280 | } | |
281 | spin_unlock(&ses->chan_lock); | |
282 | ||
73f9bfbe | 283 | mutex_lock(&ses->session_mutex); |
f486ef8e | 284 | rc = cifs_negotiate_protocol(0, ses, server); |
d1a931ce | 285 | if (!rc) { |
f486ef8e | 286 | rc = cifs_setup_session(0, ses, server, nls_codepage); |
b0dd940e | 287 | if ((rc == -EACCES) && !tcon->retry) { |
f486ef8e | 288 | mutex_unlock(&ses->session_mutex); |
73f9bfbe | 289 | rc = -EHOSTDOWN; |
b0dd940e | 290 | goto failed; |
8ea21823 SP |
291 | } else if (rc) { |
292 | mutex_unlock(&ses->session_mutex); | |
293 | goto out; | |
b0dd940e | 294 | } |
3663c904 | 295 | } else { |
73f9bfbe | 296 | mutex_unlock(&ses->session_mutex); |
aa24d1e9 PS |
297 | goto out; |
298 | } | |
3663c904 | 299 | mutex_unlock(&ses->session_mutex); |
aa24d1e9 | 300 | |
d1a931ce | 301 | skip_sess_setup: |
3663c904 SP |
302 | mutex_lock(&ses->session_mutex); |
303 | if (!tcon->need_reconnect) { | |
304 | mutex_unlock(&ses->session_mutex); | |
305 | goto out; | |
306 | } | |
aa24d1e9 | 307 | cifs_mark_open_files_invalid(tcon); |
96a988ff PS |
308 | if (tcon->use_persistent) |
309 | tcon->need_reopen_files = true; | |
52ace1ef | 310 | |
565674d6 | 311 | rc = cifs_tree_connect(0, tcon, nls_codepage); |
73f9bfbe | 312 | mutex_unlock(&ses->session_mutex); |
52ace1ef | 313 | |
f96637be | 314 | cifs_dbg(FYI, "reconnect tcon rc = %d\n", rc); |
c318e6c2 SF |
315 | if (rc) { |
316 | /* If sess reconnected but tcon didn't, something strange ... */ | |
a0a3036b | 317 | pr_warn_once("reconnect tcon failed rc = %d\n", rc); |
aa24d1e9 | 318 | goto out; |
c318e6c2 | 319 | } |
96a988ff PS |
320 | |
321 | if (smb2_command != SMB2_INTERNAL_CMD) | |
b08484d7 | 322 | mod_delayed_work(cifsiod_wq, &server->reconnect, 0); |
96a988ff | 323 | |
aa24d1e9 | 324 | atomic_inc(&tconInfoReconnectCount); |
aa24d1e9 PS |
325 | out: |
326 | /* | |
327 | * Check if handle based operation so we know whether we can continue | |
328 | * or not without returning to caller to reset file handle. | |
329 | */ | |
330 | /* | |
331 | * BB Is flush done by server on drop of tcp session? Should we special | |
332 | * case it and skip above? | |
333 | */ | |
334 | switch (smb2_command) { | |
335 | case SMB2_FLUSH: | |
336 | case SMB2_READ: | |
337 | case SMB2_WRITE: | |
338 | case SMB2_LOCK: | |
339 | case SMB2_IOCTL: | |
340 | case SMB2_QUERY_DIRECTORY: | |
341 | case SMB2_CHANGE_NOTIFY: | |
342 | case SMB2_QUERY_INFO: | |
343 | case SMB2_SET_INFO: | |
4772c795 | 344 | rc = -EAGAIN; |
aa24d1e9 | 345 | } |
b0dd940e | 346 | failed: |
aa24d1e9 | 347 | unload_nls(nls_codepage); |
ec2e4523 PS |
348 | return rc; |
349 | } | |
350 | ||
cb200bd6 | 351 | static void |
352d96f3 AA |
352 | fill_small_buf(__le16 smb2_command, struct cifs_tcon *tcon, |
353 | struct TCP_Server_Info *server, | |
354 | void *buf, | |
cb200bd6 PS |
355 | unsigned int *total_len) |
356 | { | |
0f46608a | 357 | struct smb2_pdu *spdu = buf; |
cb200bd6 PS |
358 | /* lookup word count ie StructureSize from table */ |
359 | __u16 parmsize = smb2_req_struct_sizes[le16_to_cpu(smb2_command)]; | |
360 | ||
361 | /* | |
362 | * smaller than SMALL_BUFFER_SIZE but bigger than fixed area of | |
363 | * largest operations (Create) | |
364 | */ | |
365 | memset(buf, 0, 256); | |
366 | ||
0d35e382 | 367 | smb2_hdr_assemble(&spdu->hdr, smb2_command, tcon, server); |
cb200bd6 PS |
368 | spdu->StructureSize2 = cpu_to_le16(parmsize); |
369 | ||
0d35e382 | 370 | *total_len = parmsize + sizeof(struct smb2_hdr); |
cb200bd6 PS |
371 | } |
372 | ||
ec2e4523 PS |
373 | /* |
374 | * Allocate and return pointer to an SMB request hdr, and set basic | |
375 | * SMB information in the SMB header. If the return code is zero, this | |
305428ac | 376 | * function must have filled in request_buf pointer. |
ec2e4523 | 377 | */ |
84a1f5b1 | 378 | static int __smb2_plain_req_init(__le16 smb2_command, struct cifs_tcon *tcon, |
352d96f3 AA |
379 | struct TCP_Server_Info *server, |
380 | void **request_buf, unsigned int *total_len) | |
ec2e4523 | 381 | { |
ec2e4523 | 382 | /* BB eventually switch this to SMB2 specific small buf size */ |
f46ecbd9 SB |
383 | if (smb2_command == SMB2_SET_INFO) |
384 | *request_buf = cifs_buf_get(); | |
385 | else | |
386 | *request_buf = cifs_small_buf_get(); | |
ec2e4523 PS |
387 | if (*request_buf == NULL) { |
388 | /* BB should we add a retry in here if not a writepage? */ | |
389 | return -ENOMEM; | |
390 | } | |
391 | ||
352d96f3 | 392 | fill_small_buf(smb2_command, tcon, server, |
0d35e382 | 393 | (struct smb2_hdr *)(*request_buf), |
305428ac | 394 | total_len); |
ec2e4523 PS |
395 | |
396 | if (tcon != NULL) { | |
ec2e4523 PS |
397 | uint16_t com_code = le16_to_cpu(smb2_command); |
398 | cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_sent[com_code]); | |
ec2e4523 PS |
399 | cifs_stats_inc(&tcon->num_smbs_sent); |
400 | } | |
401 | ||
84a1f5b1 PAS |
402 | return 0; |
403 | } | |
404 | ||
405 | static int smb2_plain_req_init(__le16 smb2_command, struct cifs_tcon *tcon, | |
352d96f3 | 406 | struct TCP_Server_Info *server, |
84a1f5b1 PAS |
407 | void **request_buf, unsigned int *total_len) |
408 | { | |
409 | int rc; | |
410 | ||
352d96f3 | 411 | rc = smb2_reconnect(smb2_command, tcon, server); |
84a1f5b1 PAS |
412 | if (rc) |
413 | return rc; | |
414 | ||
352d96f3 | 415 | return __smb2_plain_req_init(smb2_command, tcon, server, request_buf, |
84a1f5b1 PAS |
416 | total_len); |
417 | } | |
418 | ||
419 | static int smb2_ioctl_req_init(u32 opcode, struct cifs_tcon *tcon, | |
352d96f3 | 420 | struct TCP_Server_Info *server, |
84a1f5b1 PAS |
421 | void **request_buf, unsigned int *total_len) |
422 | { | |
423 | /* Skip reconnect only for FSCTL_VALIDATE_NEGOTIATE_INFO IOCTLs */ | |
424 | if (opcode == FSCTL_VALIDATE_NEGOTIATE_INFO) { | |
352d96f3 AA |
425 | return __smb2_plain_req_init(SMB2_IOCTL, tcon, server, |
426 | request_buf, total_len); | |
84a1f5b1 | 427 | } |
352d96f3 AA |
428 | return smb2_plain_req_init(SMB2_IOCTL, tcon, server, |
429 | request_buf, total_len); | |
ec2e4523 PS |
430 | } |
431 | ||
d7bef4c4 | 432 | /* For explanation of negotiate contexts see MS-SMB2 section 2.2.3.1 */ |
ebb3a9d4 SF |
433 | |
434 | static void | |
435 | build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt) | |
436 | { | |
437 | pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES; | |
438 | pneg_ctxt->DataLength = cpu_to_le16(38); | |
439 | pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1); | |
fc0b3844 RS |
440 | pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE); |
441 | get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE); | |
ebb3a9d4 SF |
442 | pneg_ctxt->HashAlgorithms = SMB2_PREAUTH_INTEGRITY_SHA512; |
443 | } | |
444 | ||
26ea888f SF |
445 | static void |
446 | build_compression_ctxt(struct smb2_compression_capabilities_context *pneg_ctxt) | |
447 | { | |
448 | pneg_ctxt->ContextType = SMB2_COMPRESSION_CAPABILITIES; | |
449 | pneg_ctxt->DataLength = | |
450 | cpu_to_le16(sizeof(struct smb2_compression_capabilities_context) | |
451 | - sizeof(struct smb2_neg_context)); | |
452 | pneg_ctxt->CompressionAlgorithmCount = cpu_to_le16(3); | |
453 | pneg_ctxt->CompressionAlgorithms[0] = SMB3_COMPRESS_LZ77; | |
454 | pneg_ctxt->CompressionAlgorithms[1] = SMB3_COMPRESS_LZ77_HUFF; | |
455 | pneg_ctxt->CompressionAlgorithms[2] = SMB3_COMPRESS_LZNT1; | |
456 | } | |
457 | ||
53d31a3f SF |
458 | static unsigned int |
459 | build_signing_ctxt(struct smb2_signing_capabilities *pneg_ctxt) | |
460 | { | |
461 | unsigned int ctxt_len = sizeof(struct smb2_signing_capabilities); | |
462 | unsigned short num_algs = 1; /* number of signing algorithms sent */ | |
463 | ||
464 | pneg_ctxt->ContextType = SMB2_SIGNING_CAPABILITIES; | |
465 | /* | |
466 | * Context Data length must be rounded to multiple of 8 for some servers | |
467 | */ | |
468 | pneg_ctxt->DataLength = cpu_to_le16(DIV_ROUND_UP( | |
469 | sizeof(struct smb2_signing_capabilities) - | |
470 | sizeof(struct smb2_neg_context) + | |
471 | (num_algs * 2 /* sizeof u16 */), 8) * 8); | |
472 | pneg_ctxt->SigningAlgorithmCount = cpu_to_le16(num_algs); | |
473 | pneg_ctxt->SigningAlgorithms[0] = cpu_to_le16(SIGNING_ALG_AES_CMAC); | |
474 | ||
475 | ctxt_len += 2 /* sizeof le16 */ * num_algs; | |
476 | ctxt_len = DIV_ROUND_UP(ctxt_len, 8) * 8; | |
477 | return ctxt_len; | |
478 | /* TBD add SIGNING_ALG_AES_GMAC and/or SIGNING_ALG_HMAC_SHA256 */ | |
479 | } | |
480 | ||
ebb3a9d4 SF |
481 | static void |
482 | build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt) | |
483 | { | |
484 | pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES; | |
fbfd0b46 SF |
485 | if (require_gcm_256) { |
486 | pneg_ctxt->DataLength = cpu_to_le16(4); /* Cipher Count + 1 cipher */ | |
487 | pneg_ctxt->CipherCount = cpu_to_le16(1); | |
488 | pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES256_GCM; | |
29e27923 SF |
489 | } else if (enable_gcm_256) { |
490 | pneg_ctxt->DataLength = cpu_to_le16(8); /* Cipher Count + 3 ciphers */ | |
491 | pneg_ctxt->CipherCount = cpu_to_le16(3); | |
492 | pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES128_GCM; | |
493 | pneg_ctxt->Ciphers[1] = SMB2_ENCRYPTION_AES256_GCM; | |
494 | pneg_ctxt->Ciphers[2] = SMB2_ENCRYPTION_AES128_CCM; | |
fbfd0b46 SF |
495 | } else { |
496 | pneg_ctxt->DataLength = cpu_to_le16(6); /* Cipher Count + 2 ciphers */ | |
497 | pneg_ctxt->CipherCount = cpu_to_le16(2); | |
498 | pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES128_GCM; | |
499 | pneg_ctxt->Ciphers[1] = SMB2_ENCRYPTION_AES128_CCM; | |
500 | } | |
ebb3a9d4 SF |
501 | } |
502 | ||
96d3cca1 SF |
503 | static unsigned int |
504 | build_netname_ctxt(struct smb2_netname_neg_context *pneg_ctxt, char *hostname) | |
505 | { | |
506 | struct nls_table *cp = load_nls_default(); | |
507 | ||
508 | pneg_ctxt->ContextType = SMB2_NETNAME_NEGOTIATE_CONTEXT_ID; | |
509 | ||
510 | /* copy up to max of first 100 bytes of server name to NetName field */ | |
df58fae7 | 511 | pneg_ctxt->DataLength = cpu_to_le16(2 * cifs_strtoUTF16(pneg_ctxt->NetName, hostname, 100, cp)); |
96d3cca1 SF |
512 | /* context size is DataLength + minimal smb2_neg_context */ |
513 | return DIV_ROUND_UP(le16_to_cpu(pneg_ctxt->DataLength) + | |
514 | sizeof(struct smb2_neg_context), 8) * 8; | |
515 | } | |
516 | ||
fcef0db6 SF |
517 | static void |
518 | build_posix_ctxt(struct smb2_posix_neg_context *pneg_ctxt) | |
519 | { | |
520 | pneg_ctxt->ContextType = SMB2_POSIX_EXTENSIONS_AVAILABLE; | |
521 | pneg_ctxt->DataLength = cpu_to_le16(POSIX_CTXT_DATA_LEN); | |
0d481325 SF |
522 | /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */ |
523 | pneg_ctxt->Name[0] = 0x93; | |
524 | pneg_ctxt->Name[1] = 0xAD; | |
525 | pneg_ctxt->Name[2] = 0x25; | |
526 | pneg_ctxt->Name[3] = 0x50; | |
527 | pneg_ctxt->Name[4] = 0x9C; | |
528 | pneg_ctxt->Name[5] = 0xB4; | |
529 | pneg_ctxt->Name[6] = 0x11; | |
530 | pneg_ctxt->Name[7] = 0xE7; | |
531 | pneg_ctxt->Name[8] = 0xB4; | |
532 | pneg_ctxt->Name[9] = 0x23; | |
533 | pneg_ctxt->Name[10] = 0x83; | |
534 | pneg_ctxt->Name[11] = 0xDE; | |
535 | pneg_ctxt->Name[12] = 0x96; | |
536 | pneg_ctxt->Name[13] = 0x8B; | |
537 | pneg_ctxt->Name[14] = 0xCD; | |
538 | pneg_ctxt->Name[15] = 0x7C; | |
fcef0db6 SF |
539 | } |
540 | ||
ebb3a9d4 | 541 | static void |
13cacea7 | 542 | assemble_neg_contexts(struct smb2_negotiate_req *req, |
9fe5ff1c | 543 | struct TCP_Server_Info *server, unsigned int *total_len) |
ebb3a9d4 | 544 | { |
a9f76cf8 | 545 | char *pneg_ctxt; |
9de74996 | 546 | char *hostname = NULL; |
53d31a3f | 547 | unsigned int ctxt_len, neg_context_count; |
ebb3a9d4 | 548 | |
d5c7076b SF |
549 | if (*total_len > 200) { |
550 | /* In case length corrupted don't want to overrun smb buffer */ | |
afe6f653 | 551 | cifs_server_dbg(VFS, "Bad frame length assembling neg contexts\n"); |
d5c7076b SF |
552 | return; |
553 | } | |
554 | ||
555 | /* | |
556 | * round up total_len of fixed part of SMB3 negotiate request to 8 | |
557 | * byte boundary before adding negotiate contexts | |
558 | */ | |
559 | *total_len = roundup(*total_len, 8); | |
560 | ||
561 | pneg_ctxt = (*total_len) + (char *)req; | |
562 | req->NegotiateContextOffset = cpu_to_le32(*total_len); | |
563 | ||
ebb3a9d4 | 564 | build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt); |
fcef0db6 SF |
565 | ctxt_len = DIV_ROUND_UP(sizeof(struct smb2_preauth_neg_context), 8) * 8; |
566 | *total_len += ctxt_len; | |
567 | pneg_ctxt += ctxt_len; | |
13cacea7 | 568 | |
ebb3a9d4 | 569 | build_encrypt_ctxt((struct smb2_encryption_neg_context *)pneg_ctxt); |
fcef0db6 SF |
570 | ctxt_len = DIV_ROUND_UP(sizeof(struct smb2_encryption_neg_context), 8) * 8; |
571 | *total_len += ctxt_len; | |
572 | pneg_ctxt += ctxt_len; | |
573 | ||
9de74996 SP |
574 | /* |
575 | * secondary channels don't have the hostname field populated | |
576 | * use the hostname field in the primary channel instead | |
577 | */ | |
578 | hostname = CIFS_SERVER_IS_CHAN(server) ? | |
579 | server->primary_server->hostname : server->hostname; | |
580 | if (hostname && (hostname[0] != 0)) { | |
73130a7b | 581 | ctxt_len = build_netname_ctxt((struct smb2_netname_neg_context *)pneg_ctxt, |
9de74996 | 582 | hostname); |
73130a7b SF |
583 | *total_len += ctxt_len; |
584 | pneg_ctxt += ctxt_len; | |
73130a7b | 585 | neg_context_count = 3; |
32f31918 SF |
586 | } else |
587 | neg_context_count = 2; | |
588 | ||
589 | build_posix_ctxt((struct smb2_posix_neg_context *)pneg_ctxt); | |
590 | *total_len += sizeof(struct smb2_posix_neg_context); | |
591 | pneg_ctxt += sizeof(struct smb2_posix_neg_context); | |
592 | neg_context_count++; | |
53d31a3f | 593 | |
9fe5ff1c SF |
594 | if (server->compress_algorithm) { |
595 | build_compression_ctxt((struct smb2_compression_capabilities_context *) | |
26ea888f | 596 | pneg_ctxt); |
9fe5ff1c SF |
597 | ctxt_len = DIV_ROUND_UP( |
598 | sizeof(struct smb2_compression_capabilities_context), | |
599 | 8) * 8; | |
600 | *total_len += ctxt_len; | |
601 | pneg_ctxt += ctxt_len; | |
53d31a3f SF |
602 | neg_context_count++; |
603 | } | |
96d3cca1 | 604 | |
53d31a3f SF |
605 | if (enable_negotiate_signing) { |
606 | ctxt_len = build_signing_ctxt((struct smb2_signing_capabilities *) | |
607 | pneg_ctxt); | |
608 | *total_len += ctxt_len; | |
609 | pneg_ctxt += ctxt_len; | |
610 | neg_context_count++; | |
611 | } | |
612 | ||
613 | /* check for and add transport_capabilities and signing capabilities */ | |
614 | req->NegotiateContextCount = cpu_to_le16(neg_context_count); | |
96d3cca1 | 615 | |
ebb3a9d4 | 616 | } |
5100d8a3 SF |
617 | |
618 | static void decode_preauth_context(struct smb2_preauth_neg_context *ctxt) | |
619 | { | |
620 | unsigned int len = le16_to_cpu(ctxt->DataLength); | |
621 | ||
622 | /* If invalid preauth context warn but use what we requested, SHA-512 */ | |
623 | if (len < MIN_PREAUTH_CTXT_DATA_LEN) { | |
a0a3036b | 624 | pr_warn_once("server sent bad preauth context\n"); |
5100d8a3 | 625 | return; |
7955f105 SF |
626 | } else if (len < MIN_PREAUTH_CTXT_DATA_LEN + le16_to_cpu(ctxt->SaltLength)) { |
627 | pr_warn_once("server sent invalid SaltLength\n"); | |
628 | return; | |
5100d8a3 SF |
629 | } |
630 | if (le16_to_cpu(ctxt->HashAlgorithmCount) != 1) | |
a0a3036b | 631 | pr_warn_once("Invalid SMB3 hash algorithm count\n"); |
5100d8a3 | 632 | if (ctxt->HashAlgorithms != SMB2_PREAUTH_INTEGRITY_SHA512) |
a0a3036b | 633 | pr_warn_once("unknown SMB3 hash algorithm\n"); |
5100d8a3 SF |
634 | } |
635 | ||
26ea888f SF |
636 | static void decode_compress_ctx(struct TCP_Server_Info *server, |
637 | struct smb2_compression_capabilities_context *ctxt) | |
638 | { | |
639 | unsigned int len = le16_to_cpu(ctxt->DataLength); | |
640 | ||
641 | /* sizeof compress context is a one element compression capbility struct */ | |
642 | if (len < 10) { | |
a0a3036b | 643 | pr_warn_once("server sent bad compression cntxt\n"); |
26ea888f SF |
644 | return; |
645 | } | |
646 | if (le16_to_cpu(ctxt->CompressionAlgorithmCount) != 1) { | |
a0a3036b | 647 | pr_warn_once("Invalid SMB3 compress algorithm count\n"); |
26ea888f SF |
648 | return; |
649 | } | |
650 | if (le16_to_cpu(ctxt->CompressionAlgorithms[0]) > 3) { | |
a0a3036b | 651 | pr_warn_once("unknown compression algorithm\n"); |
26ea888f SF |
652 | return; |
653 | } | |
654 | server->compress_algorithm = ctxt->CompressionAlgorithms[0]; | |
655 | } | |
656 | ||
5100d8a3 SF |
657 | static int decode_encrypt_ctx(struct TCP_Server_Info *server, |
658 | struct smb2_encryption_neg_context *ctxt) | |
659 | { | |
660 | unsigned int len = le16_to_cpu(ctxt->DataLength); | |
661 | ||
662 | cifs_dbg(FYI, "decode SMB3.11 encryption neg context of len %d\n", len); | |
663 | if (len < MIN_ENCRYPT_CTXT_DATA_LEN) { | |
a0a3036b | 664 | pr_warn_once("server sent bad crypto ctxt len\n"); |
5100d8a3 SF |
665 | return -EINVAL; |
666 | } | |
667 | ||
668 | if (le16_to_cpu(ctxt->CipherCount) != 1) { | |
a0a3036b | 669 | pr_warn_once("Invalid SMB3.11 cipher count\n"); |
5100d8a3 SF |
670 | return -EINVAL; |
671 | } | |
672 | cifs_dbg(FYI, "SMB311 cipher type:%d\n", le16_to_cpu(ctxt->Ciphers[0])); | |
511ac89e SF |
673 | if (require_gcm_256) { |
674 | if (ctxt->Ciphers[0] != SMB2_ENCRYPTION_AES256_GCM) { | |
675 | cifs_dbg(VFS, "Server does not support requested encryption type (AES256 GCM)\n"); | |
676 | return -EOPNOTSUPP; | |
677 | } | |
678 | } else if (ctxt->Ciphers[0] == 0) { | |
acf96fef SF |
679 | /* |
680 | * e.g. if server only supported AES256_CCM (very unlikely) | |
681 | * or server supported no encryption types or had all disabled. | |
682 | * Since GLOBAL_CAP_ENCRYPTION will be not set, in the case | |
683 | * in which mount requested encryption ("seal") checks later | |
684 | * on during tree connection will return proper rc, but if | |
685 | * seal not requested by client, since server is allowed to | |
686 | * return 0 to indicate no supported cipher, we can't fail here | |
687 | */ | |
688 | server->cipher_type = 0; | |
689 | server->capabilities &= ~SMB2_GLOBAL_CAP_ENCRYPTION; | |
690 | pr_warn_once("Server does not support requested encryption types\n"); | |
691 | return 0; | |
511ac89e SF |
692 | } else if ((ctxt->Ciphers[0] != SMB2_ENCRYPTION_AES128_CCM) && |
693 | (ctxt->Ciphers[0] != SMB2_ENCRYPTION_AES128_GCM) && | |
694 | (ctxt->Ciphers[0] != SMB2_ENCRYPTION_AES256_GCM)) { | |
695 | /* server returned a cipher we didn't ask for */ | |
a0a3036b | 696 | pr_warn_once("Invalid SMB3.11 cipher returned\n"); |
5100d8a3 SF |
697 | return -EINVAL; |
698 | } | |
699 | server->cipher_type = ctxt->Ciphers[0]; | |
23657ad7 | 700 | server->capabilities |= SMB2_GLOBAL_CAP_ENCRYPTION; |
5100d8a3 SF |
701 | return 0; |
702 | } | |
703 | ||
53d31a3f SF |
704 | static void decode_signing_ctx(struct TCP_Server_Info *server, |
705 | struct smb2_signing_capabilities *pctxt) | |
706 | { | |
707 | unsigned int len = le16_to_cpu(pctxt->DataLength); | |
708 | ||
709 | if ((len < 4) || (len > 16)) { | |
710 | pr_warn_once("server sent bad signing negcontext\n"); | |
711 | return; | |
712 | } | |
713 | if (le16_to_cpu(pctxt->SigningAlgorithmCount) != 1) { | |
714 | pr_warn_once("Invalid signing algorithm count\n"); | |
715 | return; | |
716 | } | |
717 | if (le16_to_cpu(pctxt->SigningAlgorithms[0]) > 2) { | |
718 | pr_warn_once("unknown signing algorithm\n"); | |
719 | return; | |
720 | } | |
721 | ||
722 | server->signing_negotiated = true; | |
723 | server->signing_algorithm = le16_to_cpu(pctxt->SigningAlgorithms[0]); | |
724 | cifs_dbg(FYI, "signing algorithm %d chosen\n", | |
725 | server->signing_algorithm); | |
726 | } | |
727 | ||
728 | ||
5100d8a3 | 729 | static int smb311_decode_neg_context(struct smb2_negotiate_rsp *rsp, |
977b6170 RS |
730 | struct TCP_Server_Info *server, |
731 | unsigned int len_of_smb) | |
5100d8a3 SF |
732 | { |
733 | struct smb2_neg_context *pctx; | |
734 | unsigned int offset = le32_to_cpu(rsp->NegotiateContextOffset); | |
735 | unsigned int ctxt_cnt = le16_to_cpu(rsp->NegotiateContextCount); | |
5100d8a3 SF |
736 | unsigned int len_of_ctxts, i; |
737 | int rc = 0; | |
738 | ||
739 | cifs_dbg(FYI, "decoding %d negotiate contexts\n", ctxt_cnt); | |
740 | if (len_of_smb <= offset) { | |
afe6f653 | 741 | cifs_server_dbg(VFS, "Invalid response: negotiate context offset\n"); |
5100d8a3 SF |
742 | return -EINVAL; |
743 | } | |
744 | ||
745 | len_of_ctxts = len_of_smb - offset; | |
746 | ||
747 | for (i = 0; i < ctxt_cnt; i++) { | |
748 | int clen; | |
749 | /* check that offset is not beyond end of SMB */ | |
750 | if (len_of_ctxts == 0) | |
751 | break; | |
752 | ||
753 | if (len_of_ctxts < sizeof(struct smb2_neg_context)) | |
754 | break; | |
755 | ||
1fc6ad2f | 756 | pctx = (struct smb2_neg_context *)(offset + (char *)rsp); |
5100d8a3 SF |
757 | clen = le16_to_cpu(pctx->DataLength); |
758 | if (clen > len_of_ctxts) | |
759 | break; | |
760 | ||
761 | if (pctx->ContextType == SMB2_PREAUTH_INTEGRITY_CAPABILITIES) | |
762 | decode_preauth_context( | |
763 | (struct smb2_preauth_neg_context *)pctx); | |
764 | else if (pctx->ContextType == SMB2_ENCRYPTION_CAPABILITIES) | |
765 | rc = decode_encrypt_ctx(server, | |
766 | (struct smb2_encryption_neg_context *)pctx); | |
26ea888f SF |
767 | else if (pctx->ContextType == SMB2_COMPRESSION_CAPABILITIES) |
768 | decode_compress_ctx(server, | |
769 | (struct smb2_compression_capabilities_context *)pctx); | |
fcef0db6 SF |
770 | else if (pctx->ContextType == SMB2_POSIX_EXTENSIONS_AVAILABLE) |
771 | server->posix_ext_supported = true; | |
53d31a3f SF |
772 | else if (pctx->ContextType == SMB2_SIGNING_CAPABILITIES) |
773 | decode_signing_ctx(server, | |
774 | (struct smb2_signing_capabilities *)pctx); | |
5100d8a3 | 775 | else |
afe6f653 | 776 | cifs_server_dbg(VFS, "unknown negcontext of type %d ignored\n", |
5100d8a3 SF |
777 | le16_to_cpu(pctx->ContextType)); |
778 | ||
779 | if (rc) | |
780 | break; | |
781 | /* offsets must be 8 byte aligned */ | |
782 | clen = (clen + 7) & ~0x7; | |
783 | offset += clen + sizeof(struct smb2_neg_context); | |
784 | len_of_ctxts -= clen; | |
785 | } | |
786 | return rc; | |
787 | } | |
788 | ||
ce558b0e SF |
789 | static struct create_posix * |
790 | create_posix_buf(umode_t mode) | |
791 | { | |
792 | struct create_posix *buf; | |
793 | ||
794 | buf = kzalloc(sizeof(struct create_posix), | |
795 | GFP_KERNEL); | |
796 | if (!buf) | |
797 | return NULL; | |
798 | ||
799 | buf->ccontext.DataOffset = | |
800 | cpu_to_le16(offsetof(struct create_posix, Mode)); | |
801 | buf->ccontext.DataLength = cpu_to_le32(4); | |
802 | buf->ccontext.NameOffset = | |
803 | cpu_to_le16(offsetof(struct create_posix, Name)); | |
804 | buf->ccontext.NameLength = cpu_to_le16(16); | |
805 | ||
806 | /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */ | |
807 | buf->Name[0] = 0x93; | |
808 | buf->Name[1] = 0xAD; | |
809 | buf->Name[2] = 0x25; | |
810 | buf->Name[3] = 0x50; | |
811 | buf->Name[4] = 0x9C; | |
812 | buf->Name[5] = 0xB4; | |
813 | buf->Name[6] = 0x11; | |
814 | buf->Name[7] = 0xE7; | |
815 | buf->Name[8] = 0xB4; | |
816 | buf->Name[9] = 0x23; | |
817 | buf->Name[10] = 0x83; | |
818 | buf->Name[11] = 0xDE; | |
819 | buf->Name[12] = 0x96; | |
820 | buf->Name[13] = 0x8B; | |
821 | buf->Name[14] = 0xCD; | |
822 | buf->Name[15] = 0x7C; | |
823 | buf->Mode = cpu_to_le32(mode); | |
a0a3036b | 824 | cifs_dbg(FYI, "mode on posix create 0%o\n", mode); |
ce558b0e SF |
825 | return buf; |
826 | } | |
827 | ||
828 | static int | |
829 | add_posix_context(struct kvec *iov, unsigned int *num_iovec, umode_t mode) | |
830 | { | |
831 | struct smb2_create_req *req = iov[0].iov_base; | |
832 | unsigned int num = *num_iovec; | |
833 | ||
834 | iov[num].iov_base = create_posix_buf(mode); | |
d0959b08 | 835 | if (mode == ACL_NO_MODE) |
a0a3036b | 836 | cifs_dbg(FYI, "Invalid mode\n"); |
ce558b0e SF |
837 | if (iov[num].iov_base == NULL) |
838 | return -ENOMEM; | |
839 | iov[num].iov_len = sizeof(struct create_posix); | |
840 | if (!req->CreateContextsOffset) | |
841 | req->CreateContextsOffset = cpu_to_le32( | |
842 | sizeof(struct smb2_create_req) + | |
843 | iov[num - 1].iov_len); | |
844 | le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_posix)); | |
845 | *num_iovec = num + 1; | |
846 | return 0; | |
847 | } | |
848 | ||
ebb3a9d4 | 849 | |
ec2e4523 PS |
850 | /* |
851 | * | |
852 | * SMB2 Worker functions follow: | |
853 | * | |
854 | * The general structure of the worker functions is: | |
855 | * 1) Call smb2_init (assembles SMB2 header) | |
856 | * 2) Initialize SMB2 command specific fields in fixed length area of SMB | |
857 | * 3) Call smb_sendrcv2 (sends request on socket and waits for response) | |
858 | * 4) Decode SMB2 command specific fields in the fixed length area | |
859 | * 5) Decode variable length data area (if any for this SMB2 command type) | |
860 | * 6) Call free smb buffer | |
861 | * 7) return | |
862 | * | |
863 | */ | |
864 | ||
865 | int | |
f486ef8e SP |
866 | SMB2_negotiate(const unsigned int xid, |
867 | struct cifs_ses *ses, | |
868 | struct TCP_Server_Info *server) | |
ec2e4523 | 869 | { |
40eff45b | 870 | struct smb_rqst rqst; |
ec2e4523 PS |
871 | struct smb2_negotiate_req *req; |
872 | struct smb2_negotiate_rsp *rsp; | |
873 | struct kvec iov[1]; | |
da502f7d | 874 | struct kvec rsp_iov; |
ec2e4523 PS |
875 | int rc = 0; |
876 | int resp_buftype; | |
ec2e4523 PS |
877 | int blob_offset, blob_length; |
878 | char *security_blob; | |
879 | int flags = CIFS_NEG_OP; | |
13cacea7 | 880 | unsigned int total_len; |
ec2e4523 | 881 | |
f96637be | 882 | cifs_dbg(FYI, "Negotiate protocol\n"); |
ec2e4523 | 883 | |
3534b850 JL |
884 | if (!server) { |
885 | WARN(1, "%s: server is NULL!\n", __func__); | |
886 | return -EIO; | |
ec2e4523 PS |
887 | } |
888 | ||
352d96f3 AA |
889 | rc = smb2_plain_req_init(SMB2_NEGOTIATE, NULL, server, |
890 | (void **) &req, &total_len); | |
ec2e4523 PS |
891 | if (rc) |
892 | return rc; | |
893 | ||
0d35e382 | 894 | req->hdr.SessionId = 0; |
0fdfef9a | 895 | |
8bd68c6e AA |
896 | memset(server->preauth_sha_hash, 0, SMB2_PREAUTH_HASH_SIZE); |
897 | memset(ses->preauth_sha_hash, 0, SMB2_PREAUTH_HASH_SIZE); | |
ec2e4523 | 898 | |
f6a6bf7c | 899 | if (strcmp(server->vals->version_string, |
9764c02f SF |
900 | SMB3ANY_VERSION_STRING) == 0) { |
901 | req->Dialects[0] = cpu_to_le16(SMB30_PROT_ID); | |
902 | req->Dialects[1] = cpu_to_le16(SMB302_PROT_ID); | |
6dffa4c2 SF |
903 | req->Dialects[2] = cpu_to_le16(SMB311_PROT_ID); |
904 | req->DialectCount = cpu_to_le16(3); | |
905 | total_len += 6; | |
afe6f653 | 906 | } else if (strcmp(server->vals->version_string, |
9764c02f SF |
907 | SMBDEFAULT_VERSION_STRING) == 0) { |
908 | req->Dialects[0] = cpu_to_le16(SMB21_PROT_ID); | |
909 | req->Dialects[1] = cpu_to_le16(SMB30_PROT_ID); | |
910 | req->Dialects[2] = cpu_to_le16(SMB302_PROT_ID); | |
d5c7076b SF |
911 | req->Dialects[3] = cpu_to_le16(SMB311_PROT_ID); |
912 | req->DialectCount = cpu_to_le16(4); | |
913 | total_len += 8; | |
9764c02f SF |
914 | } else { |
915 | /* otherwise send specific dialect */ | |
f6a6bf7c | 916 | req->Dialects[0] = cpu_to_le16(server->vals->protocol_id); |
9764c02f | 917 | req->DialectCount = cpu_to_le16(1); |
13cacea7 | 918 | total_len += 2; |
9764c02f | 919 | } |
ec2e4523 PS |
920 | |
921 | /* only one of SMB2 signing flags may be set in SMB2 request */ | |
38d77c50 | 922 | if (ses->sign) |
9cd2e62c | 923 | req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED); |
38d77c50 | 924 | else if (global_secflags & CIFSSEC_MAY_SIGN) |
9cd2e62c | 925 | req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED); |
38d77c50 JL |
926 | else |
927 | req->SecurityMode = 0; | |
ec2e4523 | 928 | |
afe6f653 | 929 | req->Capabilities = cpu_to_le32(server->vals->req_capabilities); |
679971e7 SF |
930 | if (ses->chan_max > 1) |
931 | req->Capabilities |= cpu_to_le32(SMB2_GLOBAL_CAP_MULTI_CHANNEL); | |
ec2e4523 | 932 | |
3c5f9be1 | 933 | /* ClientGUID must be zero for SMB2.02 dialect */ |
afe6f653 | 934 | if (server->vals->protocol_id == SMB20_PROT_ID) |
3c5f9be1 | 935 | memset(req->ClientGUID, 0, SMB2_CLIENT_GUID_SIZE); |
ebb3a9d4 | 936 | else { |
3c5f9be1 SF |
937 | memcpy(req->ClientGUID, server->client_guid, |
938 | SMB2_CLIENT_GUID_SIZE); | |
afe6f653 | 939 | if ((server->vals->protocol_id == SMB311_PROT_ID) || |
6dffa4c2 SF |
940 | (strcmp(server->vals->version_string, |
941 | SMB3ANY_VERSION_STRING) == 0) || | |
afe6f653 | 942 | (strcmp(server->vals->version_string, |
d5c7076b | 943 | SMBDEFAULT_VERSION_STRING) == 0)) |
9fe5ff1c | 944 | assemble_neg_contexts(req, server, &total_len); |
ebb3a9d4 | 945 | } |
ec2e4523 | 946 | iov[0].iov_base = (char *)req; |
13cacea7 | 947 | iov[0].iov_len = total_len; |
ec2e4523 | 948 | |
40eff45b RS |
949 | memset(&rqst, 0, sizeof(struct smb_rqst)); |
950 | rqst.rq_iov = iov; | |
951 | rqst.rq_nvec = 1; | |
952 | ||
352d96f3 AA |
953 | rc = cifs_send_recv(xid, ses, server, |
954 | &rqst, &resp_buftype, flags, &rsp_iov); | |
da502f7d PS |
955 | cifs_small_buf_release(req); |
956 | rsp = (struct smb2_negotiate_rsp *)rsp_iov.iov_base; | |
ec2e4523 PS |
957 | /* |
958 | * No tcon so can't do | |
959 | * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]); | |
960 | */ | |
7e682f76 | 961 | if (rc == -EOPNOTSUPP) { |
a0a3036b | 962 | 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 |
963 | goto neg_exit; |
964 | } else if (rc != 0) | |
ec2e4523 PS |
965 | goto neg_exit; |
966 | ||
afe6f653 | 967 | if (strcmp(server->vals->version_string, |
9764c02f SF |
968 | SMB3ANY_VERSION_STRING) == 0) { |
969 | if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) { | |
afe6f653 | 970 | cifs_server_dbg(VFS, |
9764c02f SF |
971 | "SMB2 dialect returned but not requested\n"); |
972 | return -EIO; | |
973 | } else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) { | |
afe6f653 | 974 | cifs_server_dbg(VFS, |
9764c02f SF |
975 | "SMB2.1 dialect returned but not requested\n"); |
976 | return -EIO; | |
6dffa4c2 SF |
977 | } else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID)) { |
978 | /* ops set to 3.0 by default for default so update */ | |
979 | server->ops = &smb311_operations; | |
980 | server->vals = &smb311_values; | |
9764c02f | 981 | } |
afe6f653 | 982 | } else if (strcmp(server->vals->version_string, |
9764c02f SF |
983 | SMBDEFAULT_VERSION_STRING) == 0) { |
984 | if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) { | |
afe6f653 | 985 | cifs_server_dbg(VFS, |
9764c02f SF |
986 | "SMB2 dialect returned but not requested\n"); |
987 | return -EIO; | |
988 | } else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) { | |
989 | /* ops set to 3.0 by default for default so update */ | |
afe6f653 RS |
990 | server->ops = &smb21_operations; |
991 | server->vals = &smb21_values; | |
b57a55e2 | 992 | } else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID)) { |
afe6f653 RS |
993 | server->ops = &smb311_operations; |
994 | server->vals = &smb311_values; | |
b57a55e2 | 995 | } |
590d08d3 | 996 | } else if (le16_to_cpu(rsp->DialectRevision) != |
afe6f653 | 997 | server->vals->protocol_id) { |
9764c02f | 998 | /* if requested single dialect ensure returned dialect matched */ |
a0a3036b JP |
999 | cifs_server_dbg(VFS, "Invalid 0x%x dialect returned: not requested\n", |
1000 | le16_to_cpu(rsp->DialectRevision)); | |
9764c02f SF |
1001 | return -EIO; |
1002 | } | |
1003 | ||
f96637be | 1004 | cifs_dbg(FYI, "mode 0x%x\n", rsp->SecurityMode); |
ec2e4523 | 1005 | |
e4aa25e7 | 1006 | if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) |
f96637be | 1007 | cifs_dbg(FYI, "negotiated smb2.0 dialect\n"); |
e4aa25e7 | 1008 | else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) |
f96637be | 1009 | cifs_dbg(FYI, "negotiated smb2.1 dialect\n"); |
e4aa25e7 | 1010 | else if (rsp->DialectRevision == cpu_to_le16(SMB30_PROT_ID)) |
f96637be | 1011 | cifs_dbg(FYI, "negotiated smb3.0 dialect\n"); |
20b6d8b4 SF |
1012 | else if (rsp->DialectRevision == cpu_to_le16(SMB302_PROT_ID)) |
1013 | cifs_dbg(FYI, "negotiated smb3.02 dialect\n"); | |
5f7fbf73 SF |
1014 | else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID)) |
1015 | cifs_dbg(FYI, "negotiated smb3.1.1 dialect\n"); | |
ec2e4523 | 1016 | else { |
a0a3036b JP |
1017 | cifs_server_dbg(VFS, "Invalid dialect returned by server 0x%x\n", |
1018 | le16_to_cpu(rsp->DialectRevision)); | |
ec2e4523 PS |
1019 | rc = -EIO; |
1020 | goto neg_exit; | |
1021 | } | |
1022 | server->dialect = le16_to_cpu(rsp->DialectRevision); | |
1023 | ||
8bd68c6e AA |
1024 | /* |
1025 | * Keep a copy of the hash after negprot. This hash will be | |
1026 | * the starting hash value for all sessions made from this | |
1027 | * server. | |
1028 | */ | |
1029 | memcpy(server->preauth_sha_hash, ses->preauth_sha_hash, | |
1030 | SMB2_PREAUTH_HASH_SIZE); | |
0fdfef9a | 1031 | |
e598d1d8 JL |
1032 | /* SMB2 only has an extended negflavor */ |
1033 | server->negflavor = CIFS_NEGFLAVOR_EXTENDED; | |
2365c4ea PS |
1034 | /* set it to the maximum buffer size value we can send with 1 credit */ |
1035 | server->maxBuf = min_t(unsigned int, le32_to_cpu(rsp->MaxTransactSize), | |
1036 | SMB2_MAX_BUFFER_SIZE); | |
ec2e4523 PS |
1037 | server->max_read = le32_to_cpu(rsp->MaxReadSize); |
1038 | server->max_write = le32_to_cpu(rsp->MaxWriteSize); | |
ec2e4523 | 1039 | server->sec_mode = le16_to_cpu(rsp->SecurityMode); |
07108d0e SF |
1040 | if ((server->sec_mode & SMB2_SEC_MODE_FLAGS_ALL) != server->sec_mode) |
1041 | cifs_dbg(FYI, "Server returned unexpected security mode 0x%x\n", | |
1042 | server->sec_mode); | |
ec2e4523 | 1043 | server->capabilities = le32_to_cpu(rsp->Capabilities); |
29e20f9c PS |
1044 | /* Internal types */ |
1045 | server->capabilities |= SMB2_NT_FIND | SMB2_LARGE_FILES; | |
ec2e4523 | 1046 | |
6d2fcfe6 AA |
1047 | /* |
1048 | * SMB3.0 supports only 1 cipher and doesn't have a encryption neg context | |
1049 | * Set the cipher type manually. | |
1050 | */ | |
1051 | if (server->dialect == SMB30_PROT_ID && (server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION)) | |
1052 | server->cipher_type = SMB2_ENCRYPTION_AES128_CCM; | |
1053 | ||
ec2e4523 | 1054 | security_blob = smb2_get_data_area_len(&blob_offset, &blob_length, |
0d35e382 | 1055 | (struct smb2_hdr *)rsp); |
5d875cc9 SF |
1056 | /* |
1057 | * See MS-SMB2 section 2.2.4: if no blob, client picks default which | |
1058 | * for us will be | |
1059 | * ses->sectype = RawNTLMSSP; | |
1060 | * but for time being this is our only auth choice so doesn't matter. | |
1061 | * We just found a server which sets blob length to zero expecting raw. | |
1062 | */ | |
67dbea2c | 1063 | if (blob_length == 0) { |
5d875cc9 | 1064 | cifs_dbg(FYI, "missing security blob on negprot\n"); |
67dbea2c PS |
1065 | server->sec_ntlmssp = true; |
1066 | } | |
3c1bf7e4 | 1067 | |
38d77c50 | 1068 | rc = cifs_enable_signing(server, ses->sign); |
9ddec561 JL |
1069 | if (rc) |
1070 | goto neg_exit; | |
ceb1b0b9 | 1071 | if (blob_length) { |
ebdd207e | 1072 | rc = decode_negTokenInit(security_blob, blob_length, server); |
ceb1b0b9 SF |
1073 | if (rc == 1) |
1074 | rc = 0; | |
1075 | else if (rc == 0) | |
1076 | rc = -EIO; | |
ec2e4523 | 1077 | } |
5100d8a3 | 1078 | |
5100d8a3 SF |
1079 | if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID)) { |
1080 | if (rsp->NegotiateContextCount) | |
977b6170 RS |
1081 | rc = smb311_decode_neg_context(rsp, server, |
1082 | rsp_iov.iov_len); | |
5100d8a3 | 1083 | else |
afe6f653 | 1084 | cifs_server_dbg(VFS, "Missing expected negotiate contexts\n"); |
5100d8a3 | 1085 | } |
ec2e4523 PS |
1086 | neg_exit: |
1087 | free_rsp_buf(resp_buftype, rsp); | |
1088 | return rc; | |
1089 | } | |
5478f9ba | 1090 | |
ff1c038a SF |
1091 | int smb3_validate_negotiate(const unsigned int xid, struct cifs_tcon *tcon) |
1092 | { | |
2796d303 LL |
1093 | int rc; |
1094 | struct validate_negotiate_info_req *pneg_inbuf; | |
fe83bebc | 1095 | struct validate_negotiate_info_rsp *pneg_rsp = NULL; |
ff1c038a | 1096 | u32 rsplen; |
9764c02f | 1097 | u32 inbuflen; /* max of 4 dialects */ |
afe6f653 | 1098 | struct TCP_Server_Info *server = tcon->ses->server; |
ff1c038a SF |
1099 | |
1100 | cifs_dbg(FYI, "validate negotiate\n"); | |
1101 | ||
8bd68c6e | 1102 | /* In SMB3.11 preauth integrity supersedes validate negotiate */ |
afe6f653 | 1103 | if (server->dialect == SMB311_PROT_ID) |
8bd68c6e AA |
1104 | return 0; |
1105 | ||
ff1c038a SF |
1106 | /* |
1107 | * validation ioctl must be signed, so no point sending this if we | |
0603c96f SF |
1108 | * can not sign it (ie are not known user). Even if signing is not |
1109 | * required (enabled but not negotiated), in those cases we selectively | |
ff1c038a | 1110 | * sign just this, the first and only signed request on a connection. |
0603c96f | 1111 | * Having validation of negotiate info helps reduce attack vectors. |
ff1c038a | 1112 | */ |
0603c96f | 1113 | if (tcon->ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST) |
ff1c038a SF |
1114 | return 0; /* validation requires signing */ |
1115 | ||
0603c96f SF |
1116 | if (tcon->ses->user_name == NULL) { |
1117 | cifs_dbg(FYI, "Can't validate negotiate: null user mount\n"); | |
1118 | return 0; /* validation requires signing */ | |
1119 | } | |
1120 | ||
1121 | if (tcon->ses->session_flags & SMB2_SESSION_FLAG_IS_NULL) | |
3175eb9b | 1122 | cifs_tcon_dbg(VFS, "Unexpected null user (anonymous) auth flag sent by server\n"); |
0603c96f | 1123 | |
2796d303 LL |
1124 | pneg_inbuf = kmalloc(sizeof(*pneg_inbuf), GFP_NOFS); |
1125 | if (!pneg_inbuf) | |
1126 | return -ENOMEM; | |
1127 | ||
1128 | pneg_inbuf->Capabilities = | |
afe6f653 | 1129 | cpu_to_le32(server->vals->req_capabilities); |
679971e7 SF |
1130 | if (tcon->ses->chan_max > 1) |
1131 | pneg_inbuf->Capabilities |= cpu_to_le32(SMB2_GLOBAL_CAP_MULTI_CHANNEL); | |
1132 | ||
afe6f653 | 1133 | memcpy(pneg_inbuf->Guid, server->client_guid, |
39552ea8 | 1134 | SMB2_CLIENT_GUID_SIZE); |
ff1c038a SF |
1135 | |
1136 | if (tcon->ses->sign) | |
2796d303 | 1137 | pneg_inbuf->SecurityMode = |
ff1c038a SF |
1138 | cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED); |
1139 | else if (global_secflags & CIFSSEC_MAY_SIGN) | |
2796d303 | 1140 | pneg_inbuf->SecurityMode = |
ff1c038a SF |
1141 | cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED); |
1142 | else | |
2796d303 | 1143 | pneg_inbuf->SecurityMode = 0; |
ff1c038a | 1144 | |
9764c02f | 1145 | |
afe6f653 | 1146 | if (strcmp(server->vals->version_string, |
9764c02f | 1147 | SMB3ANY_VERSION_STRING) == 0) { |
2796d303 LL |
1148 | pneg_inbuf->Dialects[0] = cpu_to_le16(SMB30_PROT_ID); |
1149 | pneg_inbuf->Dialects[1] = cpu_to_le16(SMB302_PROT_ID); | |
6dffa4c2 SF |
1150 | pneg_inbuf->Dialects[2] = cpu_to_le16(SMB311_PROT_ID); |
1151 | pneg_inbuf->DialectCount = cpu_to_le16(3); | |
1152 | /* SMB 2.1 not included so subtract one dialect from len */ | |
2796d303 | 1153 | inbuflen = sizeof(*pneg_inbuf) - |
6dffa4c2 | 1154 | (sizeof(pneg_inbuf->Dialects[0])); |
afe6f653 | 1155 | } else if (strcmp(server->vals->version_string, |
9764c02f | 1156 | SMBDEFAULT_VERSION_STRING) == 0) { |
2796d303 LL |
1157 | pneg_inbuf->Dialects[0] = cpu_to_le16(SMB21_PROT_ID); |
1158 | pneg_inbuf->Dialects[1] = cpu_to_le16(SMB30_PROT_ID); | |
1159 | pneg_inbuf->Dialects[2] = cpu_to_le16(SMB302_PROT_ID); | |
d5c7076b SF |
1160 | pneg_inbuf->Dialects[3] = cpu_to_le16(SMB311_PROT_ID); |
1161 | pneg_inbuf->DialectCount = cpu_to_le16(4); | |
6dffa4c2 | 1162 | /* structure is big enough for 4 dialects */ |
2796d303 | 1163 | inbuflen = sizeof(*pneg_inbuf); |
9764c02f SF |
1164 | } else { |
1165 | /* otherwise specific dialect was requested */ | |
2796d303 | 1166 | pneg_inbuf->Dialects[0] = |
afe6f653 | 1167 | cpu_to_le16(server->vals->protocol_id); |
2796d303 | 1168 | pneg_inbuf->DialectCount = cpu_to_le16(1); |
9764c02f | 1169 | /* structure is big enough for 3 dialects, sending only 1 */ |
2796d303 LL |
1170 | inbuflen = sizeof(*pneg_inbuf) - |
1171 | sizeof(pneg_inbuf->Dialects[0]) * 2; | |
9764c02f | 1172 | } |
ff1c038a SF |
1173 | |
1174 | rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID, | |
1175 | FSCTL_VALIDATE_NEGOTIATE_INFO, true /* is_fsctl */, | |
153322f7 SF |
1176 | (char *)pneg_inbuf, inbuflen, CIFSMaxBufSize, |
1177 | (char **)&pneg_rsp, &rsplen); | |
969ae8e8 NJ |
1178 | if (rc == -EOPNOTSUPP) { |
1179 | /* | |
1180 | * Old Windows versions or Netapp SMB server can return | |
1181 | * not supported error. Client should accept it. | |
1182 | */ | |
3175eb9b | 1183 | cifs_tcon_dbg(VFS, "Server does not support validate negotiate\n"); |
21078203 CIK |
1184 | rc = 0; |
1185 | goto out_free_inbuf; | |
969ae8e8 | 1186 | } else if (rc != 0) { |
a0a3036b JP |
1187 | cifs_tcon_dbg(VFS, "validate protocol negotiate failed: %d\n", |
1188 | rc); | |
2796d303 LL |
1189 | rc = -EIO; |
1190 | goto out_free_inbuf; | |
ff1c038a SF |
1191 | } |
1192 | ||
2796d303 LL |
1193 | rc = -EIO; |
1194 | if (rsplen != sizeof(*pneg_rsp)) { | |
a0a3036b JP |
1195 | cifs_tcon_dbg(VFS, "Invalid protocol negotiate response size: %d\n", |
1196 | rsplen); | |
7db0a6ef SF |
1197 | |
1198 | /* relax check since Mac returns max bufsize allowed on ioctl */ | |
2796d303 LL |
1199 | if (rsplen > CIFSMaxBufSize || rsplen < sizeof(*pneg_rsp)) |
1200 | goto out_free_rsp; | |
ff1c038a SF |
1201 | } |
1202 | ||
1203 | /* check validate negotiate info response matches what we got earlier */ | |
afe6f653 | 1204 | if (pneg_rsp->Dialect != cpu_to_le16(server->dialect)) |
ff1c038a SF |
1205 | goto vneg_out; |
1206 | ||
afe6f653 | 1207 | if (pneg_rsp->SecurityMode != cpu_to_le16(server->sec_mode)) |
ff1c038a SF |
1208 | goto vneg_out; |
1209 | ||
1210 | /* do not validate server guid because not saved at negprot time yet */ | |
1211 | ||
1212 | if ((le32_to_cpu(pneg_rsp->Capabilities) | SMB2_NT_FIND | | |
afe6f653 | 1213 | SMB2_LARGE_FILES) != server->capabilities) |
ff1c038a SF |
1214 | goto vneg_out; |
1215 | ||
1216 | /* validate negotiate successful */ | |
2796d303 | 1217 | rc = 0; |
ff1c038a | 1218 | cifs_dbg(FYI, "validate negotiate info successful\n"); |
2796d303 | 1219 | goto out_free_rsp; |
ff1c038a SF |
1220 | |
1221 | vneg_out: | |
3175eb9b | 1222 | cifs_tcon_dbg(VFS, "protocol revalidation - security settings mismatch\n"); |
2796d303 | 1223 | out_free_rsp: |
fe83bebc | 1224 | kfree(pneg_rsp); |
2796d303 LL |
1225 | out_free_inbuf: |
1226 | kfree(pneg_inbuf); | |
1227 | return rc; | |
ff1c038a SF |
1228 | } |
1229 | ||
ef65aaed SP |
1230 | enum securityEnum |
1231 | smb2_select_sectype(struct TCP_Server_Info *server, enum securityEnum requested) | |
1232 | { | |
1233 | switch (requested) { | |
1234 | case Kerberos: | |
1235 | case RawNTLMSSP: | |
1236 | return requested; | |
1237 | case NTLMv2: | |
1238 | return RawNTLMSSP; | |
1239 | case Unspecified: | |
1240 | if (server->sec_ntlmssp && | |
1241 | (global_secflags & CIFSSEC_MAY_NTLMSSP)) | |
1242 | return RawNTLMSSP; | |
1243 | if ((server->sec_kerberos || server->sec_mskerberos) && | |
1244 | (global_secflags & CIFSSEC_MAY_KRB5)) | |
1245 | return Kerberos; | |
df561f66 | 1246 | fallthrough; |
ef65aaed SP |
1247 | default: |
1248 | return Unspecified; | |
1249 | } | |
1250 | } | |
1251 | ||
3baf1a7b SP |
1252 | struct SMB2_sess_data { |
1253 | unsigned int xid; | |
1254 | struct cifs_ses *ses; | |
f486ef8e | 1255 | struct TCP_Server_Info *server; |
3baf1a7b SP |
1256 | struct nls_table *nls_cp; |
1257 | void (*func)(struct SMB2_sess_data *); | |
1258 | int result; | |
1259 | u64 previous_session; | |
1260 | ||
1261 | /* we will send the SMB in three pieces: | |
1262 | * a fixed length beginning part, an optional | |
1263 | * SPNEGO blob (which can be zero length), and a | |
1264 | * last part which will include the strings | |
1265 | * and rest of bcc area. This allows us to avoid | |
1266 | * a large buffer 17K allocation | |
1267 | */ | |
1268 | int buf0_type; | |
1269 | struct kvec iov[2]; | |
1270 | }; | |
1271 | ||
1272 | static int | |
1273 | SMB2_sess_alloc_buffer(struct SMB2_sess_data *sess_data) | |
1274 | { | |
1275 | int rc; | |
1276 | struct cifs_ses *ses = sess_data->ses; | |
f486ef8e | 1277 | struct TCP_Server_Info *server = sess_data->server; |
3baf1a7b | 1278 | struct smb2_sess_setup_req *req; |
88ea5cb7 | 1279 | unsigned int total_len; |
f486ef8e | 1280 | bool is_binding = false; |
3baf1a7b | 1281 | |
352d96f3 AA |
1282 | rc = smb2_plain_req_init(SMB2_SESSION_SETUP, NULL, server, |
1283 | (void **) &req, | |
1284 | &total_len); | |
3baf1a7b SP |
1285 | if (rc) |
1286 | return rc; | |
1287 | ||
f486ef8e SP |
1288 | spin_lock(&ses->chan_lock); |
1289 | is_binding = !CIFS_ALL_CHANS_NEED_RECONNECT(ses); | |
1290 | spin_unlock(&ses->chan_lock); | |
1291 | ||
1292 | if (is_binding) { | |
1293 | req->hdr.SessionId = cpu_to_le64(ses->Suid); | |
0d35e382 | 1294 | req->hdr.Flags |= SMB2_FLAGS_SIGNED; |
d70e9fa5 AA |
1295 | req->PreviousSessionId = 0; |
1296 | req->Flags = SMB2_SESSION_REQ_FLAG_BINDING; | |
f486ef8e | 1297 | cifs_dbg(FYI, "Binding to sess id: %llx\n", ses->Suid); |
d70e9fa5 AA |
1298 | } else { |
1299 | /* First session, not a reauthenticate */ | |
0d35e382 | 1300 | req->hdr.SessionId = 0; |
d70e9fa5 AA |
1301 | /* |
1302 | * if reconnect, we need to send previous sess id | |
1303 | * otherwise it is 0 | |
1304 | */ | |
d8d9de53 | 1305 | req->PreviousSessionId = cpu_to_le64(sess_data->previous_session); |
d70e9fa5 | 1306 | req->Flags = 0; /* MBZ */ |
f486ef8e SP |
1307 | cifs_dbg(FYI, "Fresh session. Previous: %llx\n", |
1308 | sess_data->previous_session); | |
d70e9fa5 | 1309 | } |
d409014e SF |
1310 | |
1311 | /* enough to enable echos and oplocks and one max size write */ | |
0d35e382 | 1312 | req->hdr.CreditRequest = cpu_to_le16(130); |
3baf1a7b SP |
1313 | |
1314 | /* only one of SMB2 signing flags may be set in SMB2 request */ | |
1315 | if (server->sign) | |
1316 | req->SecurityMode = SMB2_NEGOTIATE_SIGNING_REQUIRED; | |
1317 | else if (global_secflags & CIFSSEC_MAY_SIGN) /* one flag unlike MUST_ */ | |
1318 | req->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED; | |
1319 | else | |
1320 | req->SecurityMode = 0; | |
1321 | ||
8d33096a SF |
1322 | #ifdef CONFIG_CIFS_DFS_UPCALL |
1323 | req->Capabilities = cpu_to_le32(SMB2_GLOBAL_CAP_DFS); | |
1324 | #else | |
3baf1a7b | 1325 | req->Capabilities = 0; |
8d33096a SF |
1326 | #endif /* DFS_UPCALL */ |
1327 | ||
3baf1a7b SP |
1328 | req->Channel = 0; /* MBZ */ |
1329 | ||
1330 | sess_data->iov[0].iov_base = (char *)req; | |
88ea5cb7 RS |
1331 | /* 1 for pad */ |
1332 | sess_data->iov[0].iov_len = total_len - 1; | |
3baf1a7b SP |
1333 | /* |
1334 | * This variable will be used to clear the buffer | |
1335 | * allocated above in case of any error in the calling function. | |
1336 | */ | |
1337 | sess_data->buf0_type = CIFS_SMALL_BUFFER; | |
1338 | ||
1339 | return 0; | |
1340 | } | |
1341 | ||
1342 | static void | |
1343 | SMB2_sess_free_buffer(struct SMB2_sess_data *sess_data) | |
1344 | { | |
1345 | free_rsp_buf(sess_data->buf0_type, sess_data->iov[0].iov_base); | |
1346 | sess_data->buf0_type = CIFS_NO_BUFFER; | |
1347 | } | |
1348 | ||
1349 | static int | |
1350 | SMB2_sess_sendreceive(struct SMB2_sess_data *sess_data) | |
1351 | { | |
1352 | int rc; | |
40eff45b | 1353 | struct smb_rqst rqst; |
3baf1a7b | 1354 | struct smb2_sess_setup_req *req = sess_data->iov[0].iov_base; |
da502f7d | 1355 | struct kvec rsp_iov = { NULL, 0 }; |
3baf1a7b SP |
1356 | |
1357 | /* Testing shows that buffer offset must be at location of Buffer[0] */ | |
1358 | req->SecurityBufferOffset = | |
88ea5cb7 | 1359 | cpu_to_le16(sizeof(struct smb2_sess_setup_req) - 1 /* pad */); |
3baf1a7b SP |
1360 | req->SecurityBufferLength = cpu_to_le16(sess_data->iov[1].iov_len); |
1361 | ||
40eff45b RS |
1362 | memset(&rqst, 0, sizeof(struct smb_rqst)); |
1363 | rqst.rq_iov = sess_data->iov; | |
1364 | rqst.rq_nvec = 2; | |
3baf1a7b | 1365 | |
40eff45b RS |
1366 | /* BB add code to build os and lm fields */ |
1367 | rc = cifs_send_recv(sess_data->xid, sess_data->ses, | |
f486ef8e | 1368 | sess_data->server, |
40eff45b | 1369 | &rqst, |
88ea5cb7 | 1370 | &sess_data->buf0_type, |
0f56db83 | 1371 | CIFS_LOG_ERROR | CIFS_SESS_OP, &rsp_iov); |
da502f7d PS |
1372 | cifs_small_buf_release(sess_data->iov[0].iov_base); |
1373 | memcpy(&sess_data->iov[0], &rsp_iov, sizeof(struct kvec)); | |
3baf1a7b SP |
1374 | |
1375 | return rc; | |
1376 | } | |
1377 | ||
1378 | static int | |
1379 | SMB2_sess_establish_session(struct SMB2_sess_data *sess_data) | |
1380 | { | |
1381 | int rc = 0; | |
1382 | struct cifs_ses *ses = sess_data->ses; | |
f486ef8e | 1383 | struct TCP_Server_Info *server = sess_data->server; |
3baf1a7b | 1384 | |
cc391b69 | 1385 | cifs_server_lock(server); |
f6a6bf7c | 1386 | if (server->ops->generate_signingkey) { |
f486ef8e | 1387 | rc = server->ops->generate_signingkey(ses, server); |
3baf1a7b SP |
1388 | if (rc) { |
1389 | cifs_dbg(FYI, | |
1390 | "SMB3 session key generation failed\n"); | |
cc391b69 | 1391 | cifs_server_unlock(server); |
cabfb368 | 1392 | return rc; |
3baf1a7b SP |
1393 | } |
1394 | } | |
f6a6bf7c AA |
1395 | if (!server->session_estab) { |
1396 | server->sequence_number = 0x2; | |
1397 | server->session_estab = true; | |
3baf1a7b | 1398 | } |
cc391b69 | 1399 | cifs_server_unlock(server); |
3baf1a7b SP |
1400 | |
1401 | cifs_dbg(FYI, "SMB2/3 session established successfully\n"); | |
3baf1a7b SP |
1402 | return rc; |
1403 | } | |
1404 | ||
1405 | #ifdef CONFIG_CIFS_UPCALL | |
1406 | static void | |
1407 | SMB2_auth_kerberos(struct SMB2_sess_data *sess_data) | |
1408 | { | |
1409 | int rc; | |
1410 | struct cifs_ses *ses = sess_data->ses; | |
f486ef8e | 1411 | struct TCP_Server_Info *server = sess_data->server; |
3baf1a7b SP |
1412 | struct cifs_spnego_msg *msg; |
1413 | struct key *spnego_key = NULL; | |
1414 | struct smb2_sess_setup_rsp *rsp = NULL; | |
f486ef8e | 1415 | bool is_binding = false; |
3baf1a7b SP |
1416 | |
1417 | rc = SMB2_sess_alloc_buffer(sess_data); | |
1418 | if (rc) | |
1419 | goto out; | |
1420 | ||
f486ef8e | 1421 | spnego_key = cifs_get_spnego_key(ses, server); |
3baf1a7b SP |
1422 | if (IS_ERR(spnego_key)) { |
1423 | rc = PTR_ERR(spnego_key); | |
0a018944 SF |
1424 | if (rc == -ENOKEY) |
1425 | cifs_dbg(VFS, "Verify user has a krb5 ticket and keyutils is installed\n"); | |
3baf1a7b SP |
1426 | spnego_key = NULL; |
1427 | goto out; | |
1428 | } | |
1429 | ||
1430 | msg = spnego_key->payload.data[0]; | |
1431 | /* | |
1432 | * check version field to make sure that cifs.upcall is | |
1433 | * sending us a response in an expected form | |
1434 | */ | |
1435 | if (msg->version != CIFS_SPNEGO_UPCALL_VERSION) { | |
a0a3036b JP |
1436 | cifs_dbg(VFS, "bad cifs.upcall version. Expected %d got %d\n", |
1437 | CIFS_SPNEGO_UPCALL_VERSION, msg->version); | |
3baf1a7b SP |
1438 | rc = -EKEYREJECTED; |
1439 | goto out_put_spnego_key; | |
1440 | } | |
1441 | ||
f486ef8e SP |
1442 | spin_lock(&ses->chan_lock); |
1443 | is_binding = !CIFS_ALL_CHANS_NEED_RECONNECT(ses); | |
1444 | spin_unlock(&ses->chan_lock); | |
1445 | ||
d70e9fa5 | 1446 | /* keep session key if binding */ |
f486ef8e | 1447 | if (!is_binding) { |
d70e9fa5 AA |
1448 | ses->auth_key.response = kmemdup(msg->data, msg->sesskey_len, |
1449 | GFP_KERNEL); | |
1450 | if (!ses->auth_key.response) { | |
a0a3036b | 1451 | cifs_dbg(VFS, "Kerberos can't allocate (%u bytes) memory\n", |
d70e9fa5 AA |
1452 | msg->sesskey_len); |
1453 | rc = -ENOMEM; | |
1454 | goto out_put_spnego_key; | |
1455 | } | |
1456 | ses->auth_key.len = msg->sesskey_len; | |
3baf1a7b | 1457 | } |
3baf1a7b SP |
1458 | |
1459 | sess_data->iov[1].iov_base = msg->data + msg->sesskey_len; | |
1460 | sess_data->iov[1].iov_len = msg->secblob_len; | |
1461 | ||
1462 | rc = SMB2_sess_sendreceive(sess_data); | |
1463 | if (rc) | |
1464 | goto out_put_spnego_key; | |
1465 | ||
1466 | rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base; | |
d70e9fa5 | 1467 | /* keep session id and flags if binding */ |
f486ef8e | 1468 | if (!is_binding) { |
0d35e382 | 1469 | ses->Suid = le64_to_cpu(rsp->hdr.SessionId); |
d70e9fa5 AA |
1470 | ses->session_flags = le16_to_cpu(rsp->SessionFlags); |
1471 | } | |
3baf1a7b SP |
1472 | |
1473 | rc = SMB2_sess_establish_session(sess_data); | |
1474 | out_put_spnego_key: | |
1475 | key_invalidate(spnego_key); | |
1476 | key_put(spnego_key); | |
1477 | out: | |
1478 | sess_data->result = rc; | |
1479 | sess_data->func = NULL; | |
1480 | SMB2_sess_free_buffer(sess_data); | |
1481 | } | |
1482 | #else | |
1483 | static void | |
1484 | SMB2_auth_kerberos(struct SMB2_sess_data *sess_data) | |
1485 | { | |
1486 | cifs_dbg(VFS, "Kerberos negotiated but upcall support disabled!\n"); | |
1487 | sess_data->result = -EOPNOTSUPP; | |
1488 | sess_data->func = NULL; | |
1489 | } | |
1490 | #endif | |
1491 | ||
166cea4d SP |
1492 | static void |
1493 | SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data *sess_data); | |
1494 | ||
1495 | static void | |
1496 | SMB2_sess_auth_rawntlmssp_negotiate(struct SMB2_sess_data *sess_data) | |
5478f9ba | 1497 | { |
166cea4d SP |
1498 | int rc; |
1499 | struct cifs_ses *ses = sess_data->ses; | |
f486ef8e | 1500 | struct TCP_Server_Info *server = sess_data->server; |
5478f9ba | 1501 | struct smb2_sess_setup_rsp *rsp = NULL; |
49bd49f9 | 1502 | unsigned char *ntlmssp_blob = NULL; |
5478f9ba | 1503 | bool use_spnego = false; /* else use raw ntlmssp */ |
166cea4d | 1504 | u16 blob_length = 0; |
f486ef8e | 1505 | bool is_binding = false; |
d4e63bd6 | 1506 | |
5478f9ba PS |
1507 | /* |
1508 | * If memory allocation is successful, caller of this function | |
1509 | * frees it. | |
1510 | */ | |
1511 | ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL); | |
166cea4d SP |
1512 | if (!ses->ntlmssp) { |
1513 | rc = -ENOMEM; | |
1514 | goto out_err; | |
1515 | } | |
5c234aa5 | 1516 | ses->ntlmssp->sesskey_per_smbsess = true; |
5478f9ba | 1517 | |
166cea4d | 1518 | rc = SMB2_sess_alloc_buffer(sess_data); |
5478f9ba | 1519 | if (rc) |
166cea4d | 1520 | goto out_err; |
5478f9ba | 1521 | |
52d00533 | 1522 | rc = build_ntlmssp_smb3_negotiate_blob(&ntlmssp_blob, |
f486ef8e | 1523 | &blob_length, ses, server, |
49bd49f9 SP |
1524 | sess_data->nls_cp); |
1525 | if (rc) | |
1526 | goto out_err; | |
c2afb814 | 1527 | |
166cea4d SP |
1528 | if (use_spnego) { |
1529 | /* BB eventually need to add this */ | |
1530 | cifs_dbg(VFS, "spnego not supported for SMB2 yet\n"); | |
1531 | rc = -EOPNOTSUPP; | |
1532 | goto out; | |
166cea4d SP |
1533 | } |
1534 | sess_data->iov[1].iov_base = ntlmssp_blob; | |
1535 | sess_data->iov[1].iov_len = blob_length; | |
c2afb814 | 1536 | |
166cea4d SP |
1537 | rc = SMB2_sess_sendreceive(sess_data); |
1538 | rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base; | |
5478f9ba | 1539 | |
166cea4d SP |
1540 | /* If true, rc here is expected and not an error */ |
1541 | if (sess_data->buf0_type != CIFS_NO_BUFFER && | |
0d35e382 | 1542 | rsp->hdr.Status == STATUS_MORE_PROCESSING_REQUIRED) |
166cea4d | 1543 | rc = 0; |
38d77c50 | 1544 | |
166cea4d SP |
1545 | if (rc) |
1546 | goto out; | |
5478f9ba | 1547 | |
1fc6ad2f | 1548 | if (offsetof(struct smb2_sess_setup_rsp, Buffer) != |
166cea4d SP |
1549 | le16_to_cpu(rsp->SecurityBufferOffset)) { |
1550 | cifs_dbg(VFS, "Invalid security buffer offset %d\n", | |
1551 | le16_to_cpu(rsp->SecurityBufferOffset)); | |
5478f9ba | 1552 | rc = -EIO; |
166cea4d | 1553 | goto out; |
5478f9ba | 1554 | } |
166cea4d SP |
1555 | rc = decode_ntlmssp_challenge(rsp->Buffer, |
1556 | le16_to_cpu(rsp->SecurityBufferLength), ses); | |
1557 | if (rc) | |
1558 | goto out; | |
5478f9ba | 1559 | |
166cea4d | 1560 | cifs_dbg(FYI, "rawntlmssp session setup challenge phase\n"); |
5478f9ba | 1561 | |
f486ef8e SP |
1562 | spin_lock(&ses->chan_lock); |
1563 | is_binding = !CIFS_ALL_CHANS_NEED_RECONNECT(ses); | |
1564 | spin_unlock(&ses->chan_lock); | |
1565 | ||
d70e9fa5 | 1566 | /* keep existing ses id and flags if binding */ |
f486ef8e | 1567 | if (!is_binding) { |
0d35e382 | 1568 | ses->Suid = le64_to_cpu(rsp->hdr.SessionId); |
d70e9fa5 AA |
1569 | ses->session_flags = le16_to_cpu(rsp->SessionFlags); |
1570 | } | |
166cea4d SP |
1571 | |
1572 | out: | |
1573 | kfree(ntlmssp_blob); | |
1574 | SMB2_sess_free_buffer(sess_data); | |
1575 | if (!rc) { | |
1576 | sess_data->result = 0; | |
1577 | sess_data->func = SMB2_sess_auth_rawntlmssp_authenticate; | |
1578 | return; | |
1579 | } | |
1580 | out_err: | |
1581 | kfree(ses->ntlmssp); | |
1582 | ses->ntlmssp = NULL; | |
1583 | sess_data->result = rc; | |
1584 | sess_data->func = NULL; | |
1585 | } | |
5478f9ba | 1586 | |
166cea4d SP |
1587 | static void |
1588 | SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data *sess_data) | |
1589 | { | |
1590 | int rc; | |
1591 | struct cifs_ses *ses = sess_data->ses; | |
f486ef8e | 1592 | struct TCP_Server_Info *server = sess_data->server; |
166cea4d SP |
1593 | struct smb2_sess_setup_req *req; |
1594 | struct smb2_sess_setup_rsp *rsp = NULL; | |
1595 | unsigned char *ntlmssp_blob = NULL; | |
1596 | bool use_spnego = false; /* else use raw ntlmssp */ | |
1597 | u16 blob_length = 0; | |
f486ef8e | 1598 | bool is_binding = false; |
5478f9ba | 1599 | |
166cea4d SP |
1600 | rc = SMB2_sess_alloc_buffer(sess_data); |
1601 | if (rc) | |
1602 | goto out; | |
5478f9ba | 1603 | |
166cea4d | 1604 | req = (struct smb2_sess_setup_req *) sess_data->iov[0].iov_base; |
0d35e382 | 1605 | req->hdr.SessionId = cpu_to_le64(ses->Suid); |
166cea4d | 1606 | |
f486ef8e SP |
1607 | rc = build_ntlmssp_auth_blob(&ntlmssp_blob, &blob_length, |
1608 | ses, server, | |
1609 | sess_data->nls_cp); | |
166cea4d SP |
1610 | if (rc) { |
1611 | cifs_dbg(FYI, "build_ntlmssp_auth_blob failed %d\n", rc); | |
1612 | goto out; | |
5478f9ba PS |
1613 | } |
1614 | ||
166cea4d SP |
1615 | if (use_spnego) { |
1616 | /* BB eventually need to add this */ | |
1617 | cifs_dbg(VFS, "spnego not supported for SMB2 yet\n"); | |
1618 | rc = -EOPNOTSUPP; | |
1619 | goto out; | |
1620 | } | |
1621 | sess_data->iov[1].iov_base = ntlmssp_blob; | |
1622 | sess_data->iov[1].iov_len = blob_length; | |
5478f9ba | 1623 | |
166cea4d SP |
1624 | rc = SMB2_sess_sendreceive(sess_data); |
1625 | if (rc) | |
1626 | goto out; | |
1627 | ||
1628 | rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base; | |
1629 | ||
f486ef8e SP |
1630 | spin_lock(&ses->chan_lock); |
1631 | is_binding = !CIFS_ALL_CHANS_NEED_RECONNECT(ses); | |
1632 | spin_unlock(&ses->chan_lock); | |
1633 | ||
d70e9fa5 | 1634 | /* keep existing ses id and flags if binding */ |
f486ef8e | 1635 | if (!is_binding) { |
0d35e382 | 1636 | ses->Suid = le64_to_cpu(rsp->hdr.SessionId); |
d70e9fa5 AA |
1637 | ses->session_flags = le16_to_cpu(rsp->SessionFlags); |
1638 | } | |
5478f9ba | 1639 | |
166cea4d | 1640 | rc = SMB2_sess_establish_session(sess_data); |
f560cda9 RS |
1641 | #ifdef CONFIG_CIFS_DEBUG_DUMP_KEYS |
1642 | if (ses->server->dialect < SMB30_PROT_ID) { | |
1643 | cifs_dbg(VFS, "%s: dumping generated SMB2 session keys\n", __func__); | |
1644 | /* | |
1645 | * The session id is opaque in terms of endianness, so we can't | |
1646 | * print it as a long long. we dump it as we got it on the wire | |
1647 | */ | |
1648 | cifs_dbg(VFS, "Session Id %*ph\n", (int)sizeof(ses->Suid), | |
1649 | &ses->Suid); | |
1650 | cifs_dbg(VFS, "Session Key %*ph\n", | |
1651 | SMB2_NTLMV2_SESSKEY_SIZE, ses->auth_key.response); | |
1652 | cifs_dbg(VFS, "Signing Key %*ph\n", | |
1653 | SMB3_SIGN_KEY_SIZE, ses->auth_key.response); | |
1654 | } | |
1655 | #endif | |
166cea4d SP |
1656 | out: |
1657 | kfree(ntlmssp_blob); | |
1658 | SMB2_sess_free_buffer(sess_data); | |
1659 | kfree(ses->ntlmssp); | |
1660 | ses->ntlmssp = NULL; | |
1661 | sess_data->result = rc; | |
1662 | sess_data->func = NULL; | |
1663 | } | |
d4e63bd6 | 1664 | |
166cea4d | 1665 | static int |
f486ef8e | 1666 | SMB2_select_sec(struct SMB2_sess_data *sess_data) |
166cea4d | 1667 | { |
ef65aaed | 1668 | int type; |
f486ef8e SP |
1669 | struct cifs_ses *ses = sess_data->ses; |
1670 | struct TCP_Server_Info *server = sess_data->server; | |
ef65aaed | 1671 | |
f486ef8e | 1672 | type = smb2_select_sectype(server, ses->sectype); |
ef65aaed SP |
1673 | cifs_dbg(FYI, "sess setup type %d\n", type); |
1674 | if (type == Unspecified) { | |
a0a3036b | 1675 | cifs_dbg(VFS, "Unable to select appropriate authentication method!\n"); |
ef65aaed SP |
1676 | return -EINVAL; |
1677 | } | |
d4e63bd6 | 1678 | |
ef65aaed | 1679 | switch (type) { |
166cea4d SP |
1680 | case Kerberos: |
1681 | sess_data->func = SMB2_auth_kerberos; | |
1682 | break; | |
1683 | case RawNTLMSSP: | |
1684 | sess_data->func = SMB2_sess_auth_rawntlmssp_negotiate; | |
1685 | break; | |
1686 | default: | |
ef65aaed | 1687 | cifs_dbg(VFS, "secType %d not supported!\n", type); |
166cea4d | 1688 | return -EOPNOTSUPP; |
d4e63bd6 SP |
1689 | } |
1690 | ||
166cea4d SP |
1691 | return 0; |
1692 | } | |
1693 | ||
1694 | int | |
1695 | SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses, | |
f486ef8e | 1696 | struct TCP_Server_Info *server, |
166cea4d SP |
1697 | const struct nls_table *nls_cp) |
1698 | { | |
1699 | int rc = 0; | |
166cea4d SP |
1700 | struct SMB2_sess_data *sess_data; |
1701 | ||
1702 | cifs_dbg(FYI, "Session Setup\n"); | |
1703 | ||
1704 | if (!server) { | |
1705 | WARN(1, "%s: server is NULL!\n", __func__); | |
1706 | return -EIO; | |
d4e63bd6 | 1707 | } |
d4e63bd6 | 1708 | |
166cea4d SP |
1709 | sess_data = kzalloc(sizeof(struct SMB2_sess_data), GFP_KERNEL); |
1710 | if (!sess_data) | |
1711 | return -ENOMEM; | |
1712 | ||
166cea4d SP |
1713 | sess_data->xid = xid; |
1714 | sess_data->ses = ses; | |
f486ef8e | 1715 | sess_data->server = server; |
166cea4d SP |
1716 | sess_data->buf0_type = CIFS_NO_BUFFER; |
1717 | sess_data->nls_cp = (struct nls_table *) nls_cp; | |
b2adf22f | 1718 | sess_data->previous_session = ses->Suid; |
166cea4d | 1719 | |
f486ef8e SP |
1720 | rc = SMB2_select_sec(sess_data); |
1721 | if (rc) | |
1722 | goto out; | |
1723 | ||
8bd68c6e AA |
1724 | /* |
1725 | * Initialize the session hash with the server one. | |
1726 | */ | |
f6a6bf7c | 1727 | memcpy(ses->preauth_sha_hash, server->preauth_sha_hash, |
8bd68c6e | 1728 | SMB2_PREAUTH_HASH_SIZE); |
8bd68c6e | 1729 | |
166cea4d SP |
1730 | while (sess_data->func) |
1731 | sess_data->func(sess_data); | |
1732 | ||
c721c389 | 1733 | if ((ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST) && (ses->sign)) |
afe6f653 | 1734 | cifs_server_dbg(VFS, "signing requested but authenticated as guest\n"); |
3baf1a7b | 1735 | rc = sess_data->result; |
166cea4d | 1736 | out: |
3baf1a7b | 1737 | kfree(sess_data); |
5478f9ba PS |
1738 | return rc; |
1739 | } | |
1740 | ||
1741 | int | |
1742 | SMB2_logoff(const unsigned int xid, struct cifs_ses *ses) | |
1743 | { | |
40eff45b | 1744 | struct smb_rqst rqst; |
5478f9ba PS |
1745 | struct smb2_logoff_req *req; /* response is also trivial struct */ |
1746 | int rc = 0; | |
1747 | struct TCP_Server_Info *server; | |
7fb8986e | 1748 | int flags = 0; |
45305eda RS |
1749 | unsigned int total_len; |
1750 | struct kvec iov[1]; | |
1751 | struct kvec rsp_iov; | |
1752 | int resp_buf_type; | |
5478f9ba | 1753 | |
f96637be | 1754 | cifs_dbg(FYI, "disconnect session %p\n", ses); |
5478f9ba PS |
1755 | |
1756 | if (ses && (ses->server)) | |
1757 | server = ses->server; | |
1758 | else | |
1759 | return -EIO; | |
1760 | ||
eb4c7df6 | 1761 | /* no need to send SMB logoff if uid already closed due to reconnect */ |
d1a931ce SP |
1762 | spin_lock(&ses->chan_lock); |
1763 | if (CIFS_ALL_CHANS_NEED_RECONNECT(ses)) { | |
1764 | spin_unlock(&ses->chan_lock); | |
eb4c7df6 | 1765 | goto smb2_session_already_dead; |
d1a931ce SP |
1766 | } |
1767 | spin_unlock(&ses->chan_lock); | |
eb4c7df6 | 1768 | |
352d96f3 AA |
1769 | rc = smb2_plain_req_init(SMB2_LOGOFF, NULL, ses->server, |
1770 | (void **) &req, &total_len); | |
5478f9ba PS |
1771 | if (rc) |
1772 | return rc; | |
1773 | ||
1774 | /* since no tcon, smb2_init can not do this, so do here */ | |
0d35e382 | 1775 | req->hdr.SessionId = cpu_to_le64(ses->Suid); |
7fb8986e PS |
1776 | |
1777 | if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) | |
1778 | flags |= CIFS_TRANSFORM_REQ; | |
1779 | else if (server->sign) | |
0d35e382 | 1780 | req->hdr.Flags |= SMB2_FLAGS_SIGNED; |
45305eda | 1781 | |
392e1c5d | 1782 | flags |= CIFS_NO_RSP_BUF; |
45305eda RS |
1783 | |
1784 | iov[0].iov_base = (char *)req; | |
1785 | iov[0].iov_len = total_len; | |
5478f9ba | 1786 | |
40eff45b RS |
1787 | memset(&rqst, 0, sizeof(struct smb_rqst)); |
1788 | rqst.rq_iov = iov; | |
1789 | rqst.rq_nvec = 1; | |
1790 | ||
352d96f3 AA |
1791 | rc = cifs_send_recv(xid, ses, ses->server, |
1792 | &rqst, &resp_buf_type, flags, &rsp_iov); | |
da502f7d | 1793 | cifs_small_buf_release(req); |
5478f9ba PS |
1794 | /* |
1795 | * No tcon so can't do | |
1796 | * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]); | |
1797 | */ | |
eb4c7df6 SP |
1798 | |
1799 | smb2_session_already_dead: | |
5478f9ba PS |
1800 | return rc; |
1801 | } | |
faaf946a PS |
1802 | |
1803 | static inline void cifs_stats_fail_inc(struct cifs_tcon *tcon, uint16_t code) | |
1804 | { | |
d60622eb | 1805 | cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_failed[code]); |
faaf946a PS |
1806 | } |
1807 | ||
1808 | #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */) | |
1809 | ||
de9f68df SF |
1810 | /* These are similar values to what Windows uses */ |
1811 | static inline void init_copy_chunk_defaults(struct cifs_tcon *tcon) | |
1812 | { | |
1813 | tcon->max_chunks = 256; | |
1814 | tcon->max_bytes_chunk = 1048576; | |
1815 | tcon->max_bytes_copy = 16777216; | |
1816 | } | |
1817 | ||
faaf946a PS |
1818 | int |
1819 | SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree, | |
1820 | struct cifs_tcon *tcon, const struct nls_table *cp) | |
1821 | { | |
40eff45b | 1822 | struct smb_rqst rqst; |
faaf946a PS |
1823 | struct smb2_tree_connect_req *req; |
1824 | struct smb2_tree_connect_rsp *rsp = NULL; | |
1825 | struct kvec iov[2]; | |
db3b5474 | 1826 | struct kvec rsp_iov = { NULL, 0 }; |
faaf946a PS |
1827 | int rc = 0; |
1828 | int resp_buftype; | |
1829 | int unc_path_len; | |
faaf946a | 1830 | __le16 *unc_path = NULL; |
7fb8986e | 1831 | int flags = 0; |
661bb943 | 1832 | unsigned int total_len; |
352d96f3 AA |
1833 | struct TCP_Server_Info *server; |
1834 | ||
1835 | /* always use master channel */ | |
1836 | server = ses->server; | |
faaf946a | 1837 | |
f96637be | 1838 | cifs_dbg(FYI, "TCON\n"); |
faaf946a | 1839 | |
afe6f653 | 1840 | if (!server || !tree) |
faaf946a PS |
1841 | return -EIO; |
1842 | ||
faaf946a PS |
1843 | unc_path = kmalloc(MAX_SHARENAME_LENGTH * 2, GFP_KERNEL); |
1844 | if (unc_path == NULL) | |
1845 | return -ENOMEM; | |
1846 | ||
1847 | unc_path_len = cifs_strtoUTF16(unc_path, tree, strlen(tree), cp) + 1; | |
1848 | unc_path_len *= 2; | |
1849 | if (unc_path_len < 2) { | |
1850 | kfree(unc_path); | |
1851 | return -EINVAL; | |
1852 | } | |
1853 | ||
806a28ef | 1854 | /* SMB2 TREE_CONNECT request must be called with TreeId == 0 */ |
b327a717 | 1855 | tcon->tid = 0; |
fae8044c | 1856 | atomic_set(&tcon->num_remote_opens, 0); |
352d96f3 AA |
1857 | rc = smb2_plain_req_init(SMB2_TREE_CONNECT, tcon, server, |
1858 | (void **) &req, &total_len); | |
faaf946a PS |
1859 | if (rc) { |
1860 | kfree(unc_path); | |
1861 | return rc; | |
1862 | } | |
1863 | ||
5a77e75f | 1864 | if (smb3_encryption_required(tcon)) |
ae6f8dd4 | 1865 | flags |= CIFS_TRANSFORM_REQ; |
faaf946a PS |
1866 | |
1867 | iov[0].iov_base = (char *)req; | |
661bb943 RS |
1868 | /* 1 for pad */ |
1869 | iov[0].iov_len = total_len - 1; | |
faaf946a PS |
1870 | |
1871 | /* Testing shows that buffer offset must be at location of Buffer[0] */ | |
1872 | req->PathOffset = cpu_to_le16(sizeof(struct smb2_tree_connect_req) | |
661bb943 | 1873 | - 1 /* pad */); |
faaf946a PS |
1874 | req->PathLength = cpu_to_le16(unc_path_len - 2); |
1875 | iov[1].iov_base = unc_path; | |
1876 | iov[1].iov_len = unc_path_len; | |
1877 | ||
e71ab2aa RS |
1878 | /* |
1879 | * 3.11 tcon req must be signed if not encrypted. See MS-SMB2 3.2.4.1.1 | |
1880 | * unless it is guest or anonymous user. See MS-SMB2 3.2.5.3.1 | |
8c11a607 | 1881 | * (Samba servers don't always set the flag so also check if null user) |
e71ab2aa | 1882 | */ |
afe6f653 | 1883 | if ((server->dialect == SMB311_PROT_ID) && |
e71ab2aa | 1884 | !smb3_encryption_required(tcon) && |
8c11a607 SF |
1885 | !(ses->session_flags & |
1886 | (SMB2_SESSION_FLAG_IS_GUEST|SMB2_SESSION_FLAG_IS_NULL)) && | |
1887 | ((ses->user_name != NULL) || (ses->sectype == Kerberos))) | |
0d35e382 | 1888 | req->hdr.Flags |= SMB2_FLAGS_SIGNED; |
6188f28b | 1889 | |
40eff45b RS |
1890 | memset(&rqst, 0, sizeof(struct smb_rqst)); |
1891 | rqst.rq_iov = iov; | |
1892 | rqst.rq_nvec = 2; | |
1893 | ||
4fe75c4e | 1894 | /* Need 64 for max size write so ask for more in case not there yet */ |
0d35e382 | 1895 | req->hdr.CreditRequest = cpu_to_le16(64); |
4fe75c4e | 1896 | |
352d96f3 AA |
1897 | rc = cifs_send_recv(xid, ses, server, |
1898 | &rqst, &resp_buftype, flags, &rsp_iov); | |
da502f7d PS |
1899 | cifs_small_buf_release(req); |
1900 | rsp = (struct smb2_tree_connect_rsp *)rsp_iov.iov_base; | |
f8af49dd | 1901 | trace_smb3_tcon(xid, tcon->tid, ses->Suid, tree, rc); |
bac35395 | 1902 | if ((rc != 0) || (rsp == NULL)) { |
3559134e SF |
1903 | cifs_stats_fail_inc(tcon, SMB2_TREE_CONNECT_HE); |
1904 | tcon->need_reconnect = true; | |
faaf946a PS |
1905 | goto tcon_error_exit; |
1906 | } | |
1907 | ||
cd123007 CJ |
1908 | switch (rsp->ShareType) { |
1909 | case SMB2_SHARE_TYPE_DISK: | |
f96637be | 1910 | cifs_dbg(FYI, "connection to disk share\n"); |
cd123007 CJ |
1911 | break; |
1912 | case SMB2_SHARE_TYPE_PIPE: | |
b327a717 | 1913 | tcon->pipe = true; |
f96637be | 1914 | cifs_dbg(FYI, "connection to pipe share\n"); |
cd123007 CJ |
1915 | break; |
1916 | case SMB2_SHARE_TYPE_PRINT: | |
b327a717 | 1917 | tcon->print = true; |
f96637be | 1918 | cifs_dbg(FYI, "connection to printer\n"); |
cd123007 CJ |
1919 | break; |
1920 | default: | |
afe6f653 | 1921 | cifs_server_dbg(VFS, "unknown share type %d\n", rsp->ShareType); |
faaf946a PS |
1922 | rc = -EOPNOTSUPP; |
1923 | goto tcon_error_exit; | |
1924 | } | |
1925 | ||
1926 | tcon->share_flags = le32_to_cpu(rsp->ShareFlags); | |
769ee6a4 | 1927 | tcon->capabilities = rsp->Capabilities; /* we keep caps little endian */ |
faaf946a | 1928 | tcon->maximal_access = le32_to_cpu(rsp->MaximalAccess); |
0d35e382 | 1929 | tcon->tid = le32_to_cpu(rsp->hdr.Id.SyncId.TreeId); |
46b51d08 | 1930 | strlcpy(tcon->treeName, tree, sizeof(tcon->treeName)); |
faaf946a PS |
1931 | |
1932 | if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) && | |
1933 | ((tcon->share_flags & SHI1005_FLAGS_DFS) == 0)) | |
3175eb9b | 1934 | cifs_tcon_dbg(VFS, "DFS capability contradicts DFS flag\n"); |
ae6f8dd4 PS |
1935 | |
1936 | if (tcon->seal && | |
afe6f653 | 1937 | !(server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION)) |
3175eb9b | 1938 | cifs_tcon_dbg(VFS, "Encryption is requested but not supported\n"); |
ae6f8dd4 | 1939 | |
de9f68df | 1940 | init_copy_chunk_defaults(tcon); |
afe6f653 RS |
1941 | if (server->ops->validate_negotiate) |
1942 | rc = server->ops->validate_negotiate(xid, tcon); | |
faaf946a | 1943 | tcon_exit: |
f8af49dd | 1944 | |
faaf946a PS |
1945 | free_rsp_buf(resp_buftype, rsp); |
1946 | kfree(unc_path); | |
1947 | return rc; | |
1948 | ||
1949 | tcon_error_exit: | |
0d35e382 | 1950 | if (rsp && rsp->hdr.Status == STATUS_BAD_NETWORK_NAME) |
3175eb9b | 1951 | cifs_tcon_dbg(VFS, "BAD_NETWORK_NAME: %s\n", tree); |
faaf946a PS |
1952 | goto tcon_exit; |
1953 | } | |
1954 | ||
1955 | int | |
1956 | SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon) | |
1957 | { | |
40eff45b | 1958 | struct smb_rqst rqst; |
faaf946a PS |
1959 | struct smb2_tree_disconnect_req *req; /* response is trivial */ |
1960 | int rc = 0; | |
faaf946a | 1961 | struct cifs_ses *ses = tcon->ses; |
7fb8986e | 1962 | int flags = 0; |
4eecf4cf RS |
1963 | unsigned int total_len; |
1964 | struct kvec iov[1]; | |
1965 | struct kvec rsp_iov; | |
1966 | int resp_buf_type; | |
faaf946a | 1967 | |
f96637be | 1968 | cifs_dbg(FYI, "Tree Disconnect\n"); |
faaf946a | 1969 | |
68a6afa7 | 1970 | if (!ses || !(ses->server)) |
faaf946a PS |
1971 | return -EIO; |
1972 | ||
d1a931ce SP |
1973 | spin_lock(&ses->chan_lock); |
1974 | if ((tcon->need_reconnect) || | |
1975 | (CIFS_ALL_CHANS_NEED_RECONNECT(tcon->ses))) { | |
1976 | spin_unlock(&ses->chan_lock); | |
faaf946a | 1977 | return 0; |
d1a931ce SP |
1978 | } |
1979 | spin_unlock(&ses->chan_lock); | |
faaf946a | 1980 | |
45c0f1aa | 1981 | close_cached_dir_lease(&tcon->crfid); |
72e73c78 | 1982 | |
352d96f3 AA |
1983 | rc = smb2_plain_req_init(SMB2_TREE_DISCONNECT, tcon, ses->server, |
1984 | (void **) &req, | |
1985 | &total_len); | |
faaf946a PS |
1986 | if (rc) |
1987 | return rc; | |
1988 | ||
5a77e75f | 1989 | if (smb3_encryption_required(tcon)) |
7fb8986e PS |
1990 | flags |= CIFS_TRANSFORM_REQ; |
1991 | ||
392e1c5d | 1992 | flags |= CIFS_NO_RSP_BUF; |
4eecf4cf RS |
1993 | |
1994 | iov[0].iov_base = (char *)req; | |
1995 | iov[0].iov_len = total_len; | |
1996 | ||
40eff45b RS |
1997 | memset(&rqst, 0, sizeof(struct smb_rqst)); |
1998 | rqst.rq_iov = iov; | |
1999 | rqst.rq_nvec = 1; | |
2000 | ||
352d96f3 AA |
2001 | rc = cifs_send_recv(xid, ses, ses->server, |
2002 | &rqst, &resp_buf_type, flags, &rsp_iov); | |
da502f7d | 2003 | cifs_small_buf_release(req); |
faaf946a PS |
2004 | if (rc) |
2005 | cifs_stats_fail_inc(tcon, SMB2_TREE_DISCONNECT_HE); | |
2006 | ||
2007 | return rc; | |
2008 | } | |
2503a0db | 2009 | |
b8c32dbb | 2010 | |
63eb3def PS |
2011 | static struct create_durable * |
2012 | create_durable_buf(void) | |
2013 | { | |
2014 | struct create_durable *buf; | |
2015 | ||
2016 | buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL); | |
2017 | if (!buf) | |
2018 | return NULL; | |
2019 | ||
2020 | buf->ccontext.DataOffset = cpu_to_le16(offsetof | |
9cbc0b73 | 2021 | (struct create_durable, Data)); |
63eb3def PS |
2022 | buf->ccontext.DataLength = cpu_to_le32(16); |
2023 | buf->ccontext.NameOffset = cpu_to_le16(offsetof | |
2024 | (struct create_durable, Name)); | |
2025 | buf->ccontext.NameLength = cpu_to_le16(4); | |
12197a7f | 2026 | /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DHnQ" */ |
63eb3def PS |
2027 | buf->Name[0] = 'D'; |
2028 | buf->Name[1] = 'H'; | |
2029 | buf->Name[2] = 'n'; | |
2030 | buf->Name[3] = 'Q'; | |
2031 | return buf; | |
2032 | } | |
2033 | ||
9cbc0b73 PS |
2034 | static struct create_durable * |
2035 | create_reconnect_durable_buf(struct cifs_fid *fid) | |
2036 | { | |
2037 | struct create_durable *buf; | |
2038 | ||
2039 | buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL); | |
2040 | if (!buf) | |
2041 | return NULL; | |
2042 | ||
2043 | buf->ccontext.DataOffset = cpu_to_le16(offsetof | |
2044 | (struct create_durable, Data)); | |
2045 | buf->ccontext.DataLength = cpu_to_le32(16); | |
2046 | buf->ccontext.NameOffset = cpu_to_le16(offsetof | |
2047 | (struct create_durable, Name)); | |
2048 | buf->ccontext.NameLength = cpu_to_le16(4); | |
2049 | buf->Data.Fid.PersistentFileId = fid->persistent_fid; | |
2050 | buf->Data.Fid.VolatileFileId = fid->volatile_fid; | |
12197a7f | 2051 | /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT is "DHnC" */ |
9cbc0b73 PS |
2052 | buf->Name[0] = 'D'; |
2053 | buf->Name[1] = 'H'; | |
2054 | buf->Name[2] = 'n'; | |
2055 | buf->Name[3] = 'C'; | |
2056 | return buf; | |
2057 | } | |
2058 | ||
89a5bfa3 SF |
2059 | static void |
2060 | parse_query_id_ctxt(struct create_context *cc, struct smb2_file_all_info *buf) | |
2061 | { | |
2062 | struct create_on_disk_id *pdisk_id = (struct create_on_disk_id *)cc; | |
2063 | ||
2064 | cifs_dbg(FYI, "parse query id context 0x%llx 0x%llx\n", | |
2065 | pdisk_id->DiskFileId, pdisk_id->VolumeId); | |
2066 | buf->IndexNumber = pdisk_id->DiskFileId; | |
2067 | } | |
2068 | ||
ab3459d8 | 2069 | static void |
69dda305 AA |
2070 | parse_posix_ctxt(struct create_context *cc, struct smb2_file_all_info *info, |
2071 | struct create_posix_rsp *posix) | |
ab3459d8 | 2072 | { |
69dda305 AA |
2073 | int sid_len; |
2074 | u8 *beg = (u8 *)cc + le16_to_cpu(cc->DataOffset); | |
2075 | u8 *end = beg + le32_to_cpu(cc->DataLength); | |
2076 | u8 *sid; | |
ab3459d8 | 2077 | |
69dda305 AA |
2078 | memset(posix, 0, sizeof(*posix)); |
2079 | ||
2080 | posix->nlink = le32_to_cpu(*(__le32 *)(beg + 0)); | |
2081 | posix->reparse_tag = le32_to_cpu(*(__le32 *)(beg + 4)); | |
2082 | posix->mode = le32_to_cpu(*(__le32 *)(beg + 8)); | |
2083 | ||
2084 | sid = beg + 12; | |
2085 | sid_len = posix_info_sid_size(sid, end); | |
2086 | if (sid_len < 0) { | |
2087 | cifs_dbg(VFS, "bad owner sid in posix create response\n"); | |
2088 | return; | |
2089 | } | |
2090 | memcpy(&posix->owner, sid, sid_len); | |
2091 | ||
2092 | sid = sid + sid_len; | |
2093 | sid_len = posix_info_sid_size(sid, end); | |
2094 | if (sid_len < 0) { | |
2095 | cifs_dbg(VFS, "bad group sid in posix create response\n"); | |
2096 | return; | |
2097 | } | |
2098 | memcpy(&posix->group, sid, sid_len); | |
2e8af978 | 2099 | |
69dda305 AA |
2100 | cifs_dbg(FYI, "nlink=%d mode=%o reparse_tag=%x\n", |
2101 | posix->nlink, posix->mode, posix->reparse_tag); | |
ab3459d8 SF |
2102 | } |
2103 | ||
89a5bfa3 SF |
2104 | void |
2105 | smb2_parse_contexts(struct TCP_Server_Info *server, | |
69dda305 AA |
2106 | struct smb2_create_rsp *rsp, |
2107 | unsigned int *epoch, char *lease_key, __u8 *oplock, | |
2108 | struct smb2_file_all_info *buf, | |
2109 | struct create_posix_rsp *posix) | |
b8c32dbb PS |
2110 | { |
2111 | char *data_offset; | |
b5c7cde3 | 2112 | struct create_context *cc; |
deb7deff JM |
2113 | unsigned int next; |
2114 | unsigned int remaining; | |
fd554396 | 2115 | char *name; |
3ece60e3 CIK |
2116 | static const char smb3_create_tag_posix[] = { |
2117 | 0x93, 0xAD, 0x25, 0x50, 0x9C, | |
2118 | 0xB4, 0x11, 0xE7, 0xB4, 0x23, 0x83, | |
2119 | 0xDE, 0x96, 0x8B, 0xCD, 0x7C | |
2120 | }; | |
b8c32dbb | 2121 | |
89a5bfa3 | 2122 | *oplock = 0; |
1fc6ad2f | 2123 | data_offset = (char *)rsp + le32_to_cpu(rsp->CreateContextsOffset); |
deb7deff | 2124 | remaining = le32_to_cpu(rsp->CreateContextsLength); |
b5c7cde3 | 2125 | cc = (struct create_context *)data_offset; |
89a5bfa3 SF |
2126 | |
2127 | /* Initialize inode number to 0 in case no valid data in qfid context */ | |
2128 | if (buf) | |
2129 | buf->IndexNumber = 0; | |
2130 | ||
deb7deff | 2131 | while (remaining >= sizeof(struct create_context)) { |
b5c7cde3 | 2132 | name = le16_to_cpu(cc->NameOffset) + (char *)cc; |
deb7deff | 2133 | if (le16_to_cpu(cc->NameLength) == 4 && |
89a5bfa3 SF |
2134 | strncmp(name, SMB2_CREATE_REQUEST_LEASE, 4) == 0) |
2135 | *oplock = server->ops->parse_lease_buf(cc, epoch, | |
2136 | lease_key); | |
2137 | else if (buf && (le16_to_cpu(cc->NameLength) == 4) && | |
2138 | strncmp(name, SMB2_CREATE_QUERY_ON_DISK_ID, 4) == 0) | |
2139 | parse_query_id_ctxt(cc, buf); | |
ab3459d8 | 2140 | else if ((le16_to_cpu(cc->NameLength) == 16)) { |
69dda305 AA |
2141 | if (posix && |
2142 | memcmp(name, smb3_create_tag_posix, 16) == 0) | |
2143 | parse_posix_ctxt(cc, buf, posix); | |
ab3459d8 SF |
2144 | } |
2145 | /* else { | |
2146 | cifs_dbg(FYI, "Context not matched with len %d\n", | |
2147 | le16_to_cpu(cc->NameLength)); | |
2148 | cifs_dump_mem("Cctxt name: ", name, 4); | |
2149 | } */ | |
deb7deff JM |
2150 | |
2151 | next = le32_to_cpu(cc->Next); | |
2152 | if (!next) | |
2153 | break; | |
2154 | remaining -= next; | |
2155 | cc = (struct create_context *)((char *)cc + next); | |
2156 | } | |
b8c32dbb | 2157 | |
89a5bfa3 SF |
2158 | if (rsp->OplockLevel != SMB2_OPLOCK_LEVEL_LEASE) |
2159 | *oplock = rsp->OplockLevel; | |
2160 | ||
2161 | return; | |
b8c32dbb PS |
2162 | } |
2163 | ||
d22cbfec | 2164 | static int |
a41a28bd | 2165 | add_lease_context(struct TCP_Server_Info *server, struct kvec *iov, |
729c0c9d | 2166 | unsigned int *num_iovec, u8 *lease_key, __u8 *oplock) |
d22cbfec PS |
2167 | { |
2168 | struct smb2_create_req *req = iov[0].iov_base; | |
2169 | unsigned int num = *num_iovec; | |
2170 | ||
729c0c9d | 2171 | iov[num].iov_base = server->ops->create_lease_buf(lease_key, *oplock); |
d22cbfec PS |
2172 | if (iov[num].iov_base == NULL) |
2173 | return -ENOMEM; | |
a41a28bd | 2174 | iov[num].iov_len = server->vals->create_lease_size; |
d22cbfec PS |
2175 | req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_LEASE; |
2176 | if (!req->CreateContextsOffset) | |
2177 | req->CreateContextsOffset = cpu_to_le32( | |
4f33bc35 | 2178 | sizeof(struct smb2_create_req) + |
d22cbfec | 2179 | iov[num - 1].iov_len); |
a41a28bd PS |
2180 | le32_add_cpu(&req->CreateContextsLength, |
2181 | server->vals->create_lease_size); | |
d22cbfec PS |
2182 | *num_iovec = num + 1; |
2183 | return 0; | |
2184 | } | |
2185 | ||
b56eae4d | 2186 | static struct create_durable_v2 * |
ca567eb2 | 2187 | create_durable_v2_buf(struct cifs_open_parms *oparms) |
b56eae4d | 2188 | { |
ca567eb2 | 2189 | struct cifs_fid *pfid = oparms->fid; |
b56eae4d SF |
2190 | struct create_durable_v2 *buf; |
2191 | ||
2192 | buf = kzalloc(sizeof(struct create_durable_v2), GFP_KERNEL); | |
2193 | if (!buf) | |
2194 | return NULL; | |
2195 | ||
2196 | buf->ccontext.DataOffset = cpu_to_le16(offsetof | |
2197 | (struct create_durable_v2, dcontext)); | |
2198 | buf->ccontext.DataLength = cpu_to_le32(sizeof(struct durable_context_v2)); | |
2199 | buf->ccontext.NameOffset = cpu_to_le16(offsetof | |
2200 | (struct create_durable_v2, Name)); | |
2201 | buf->ccontext.NameLength = cpu_to_le16(4); | |
2202 | ||
ca567eb2 SF |
2203 | /* |
2204 | * NB: Handle timeout defaults to 0, which allows server to choose | |
2205 | * (most servers default to 120 seconds) and most clients default to 0. | |
2206 | * This can be overridden at mount ("handletimeout=") if the user wants | |
2207 | * a different persistent (or resilient) handle timeout for all opens | |
2208 | * opens on a particular SMB3 mount. | |
2209 | */ | |
2210 | buf->dcontext.Timeout = cpu_to_le32(oparms->tcon->handle_timeout); | |
b56eae4d | 2211 | buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT); |
fa70b87c | 2212 | generate_random_uuid(buf->dcontext.CreateGuid); |
b56eae4d SF |
2213 | memcpy(pfid->create_guid, buf->dcontext.CreateGuid, 16); |
2214 | ||
2215 | /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DH2Q" */ | |
2216 | buf->Name[0] = 'D'; | |
2217 | buf->Name[1] = 'H'; | |
2218 | buf->Name[2] = '2'; | |
2219 | buf->Name[3] = 'Q'; | |
2220 | return buf; | |
2221 | } | |
2222 | ||
2223 | static struct create_durable_handle_reconnect_v2 * | |
2224 | create_reconnect_durable_v2_buf(struct cifs_fid *fid) | |
2225 | { | |
2226 | struct create_durable_handle_reconnect_v2 *buf; | |
2227 | ||
2228 | buf = kzalloc(sizeof(struct create_durable_handle_reconnect_v2), | |
2229 | GFP_KERNEL); | |
2230 | if (!buf) | |
2231 | return NULL; | |
2232 | ||
2233 | buf->ccontext.DataOffset = | |
2234 | cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2, | |
2235 | dcontext)); | |
2236 | buf->ccontext.DataLength = | |
2237 | cpu_to_le32(sizeof(struct durable_reconnect_context_v2)); | |
2238 | buf->ccontext.NameOffset = | |
2239 | cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2, | |
2240 | Name)); | |
2241 | buf->ccontext.NameLength = cpu_to_le16(4); | |
2242 | ||
2243 | buf->dcontext.Fid.PersistentFileId = fid->persistent_fid; | |
2244 | buf->dcontext.Fid.VolatileFileId = fid->volatile_fid; | |
2245 | buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT); | |
2246 | memcpy(buf->dcontext.CreateGuid, fid->create_guid, 16); | |
2247 | ||
2248 | /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2 is "DH2C" */ | |
2249 | buf->Name[0] = 'D'; | |
2250 | buf->Name[1] = 'H'; | |
2251 | buf->Name[2] = '2'; | |
2252 | buf->Name[3] = 'C'; | |
2253 | return buf; | |
2254 | } | |
2255 | ||
63eb3def | 2256 | static int |
b56eae4d SF |
2257 | add_durable_v2_context(struct kvec *iov, unsigned int *num_iovec, |
2258 | struct cifs_open_parms *oparms) | |
2259 | { | |
2260 | struct smb2_create_req *req = iov[0].iov_base; | |
2261 | unsigned int num = *num_iovec; | |
2262 | ||
ca567eb2 | 2263 | iov[num].iov_base = create_durable_v2_buf(oparms); |
b56eae4d SF |
2264 | if (iov[num].iov_base == NULL) |
2265 | return -ENOMEM; | |
2266 | iov[num].iov_len = sizeof(struct create_durable_v2); | |
2267 | if (!req->CreateContextsOffset) | |
2268 | req->CreateContextsOffset = | |
4f33bc35 | 2269 | cpu_to_le32(sizeof(struct smb2_create_req) + |
b56eae4d SF |
2270 | iov[1].iov_len); |
2271 | le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable_v2)); | |
b56eae4d SF |
2272 | *num_iovec = num + 1; |
2273 | return 0; | |
2274 | } | |
2275 | ||
2276 | static int | |
2277 | add_durable_reconnect_v2_context(struct kvec *iov, unsigned int *num_iovec, | |
9cbc0b73 | 2278 | struct cifs_open_parms *oparms) |
63eb3def PS |
2279 | { |
2280 | struct smb2_create_req *req = iov[0].iov_base; | |
2281 | unsigned int num = *num_iovec; | |
2282 | ||
b56eae4d SF |
2283 | /* indicate that we don't need to relock the file */ |
2284 | oparms->reconnect = false; | |
2285 | ||
2286 | iov[num].iov_base = create_reconnect_durable_v2_buf(oparms->fid); | |
2287 | if (iov[num].iov_base == NULL) | |
2288 | return -ENOMEM; | |
2289 | iov[num].iov_len = sizeof(struct create_durable_handle_reconnect_v2); | |
2290 | if (!req->CreateContextsOffset) | |
2291 | req->CreateContextsOffset = | |
4f33bc35 | 2292 | cpu_to_le32(sizeof(struct smb2_create_req) + |
b56eae4d SF |
2293 | iov[1].iov_len); |
2294 | le32_add_cpu(&req->CreateContextsLength, | |
2295 | sizeof(struct create_durable_handle_reconnect_v2)); | |
b56eae4d SF |
2296 | *num_iovec = num + 1; |
2297 | return 0; | |
2298 | } | |
2299 | ||
2300 | static int | |
2301 | add_durable_context(struct kvec *iov, unsigned int *num_iovec, | |
2302 | struct cifs_open_parms *oparms, bool use_persistent) | |
2303 | { | |
2304 | struct smb2_create_req *req = iov[0].iov_base; | |
2305 | unsigned int num = *num_iovec; | |
2306 | ||
2307 | if (use_persistent) { | |
2308 | if (oparms->reconnect) | |
2309 | return add_durable_reconnect_v2_context(iov, num_iovec, | |
2310 | oparms); | |
2311 | else | |
2312 | return add_durable_v2_context(iov, num_iovec, oparms); | |
2313 | } | |
2314 | ||
9cbc0b73 PS |
2315 | if (oparms->reconnect) { |
2316 | iov[num].iov_base = create_reconnect_durable_buf(oparms->fid); | |
2317 | /* indicate that we don't need to relock the file */ | |
2318 | oparms->reconnect = false; | |
2319 | } else | |
2320 | iov[num].iov_base = create_durable_buf(); | |
63eb3def PS |
2321 | if (iov[num].iov_base == NULL) |
2322 | return -ENOMEM; | |
2323 | iov[num].iov_len = sizeof(struct create_durable); | |
2324 | if (!req->CreateContextsOffset) | |
2325 | req->CreateContextsOffset = | |
4f33bc35 | 2326 | cpu_to_le32(sizeof(struct smb2_create_req) + |
63eb3def | 2327 | iov[1].iov_len); |
31f92e9a | 2328 | le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable)); |
63eb3def PS |
2329 | *num_iovec = num + 1; |
2330 | return 0; | |
2331 | } | |
2332 | ||
cdeaf9d0 SF |
2333 | /* See MS-SMB2 2.2.13.2.7 */ |
2334 | static struct crt_twarp_ctxt * | |
2335 | create_twarp_buf(__u64 timewarp) | |
2336 | { | |
2337 | struct crt_twarp_ctxt *buf; | |
2338 | ||
2339 | buf = kzalloc(sizeof(struct crt_twarp_ctxt), GFP_KERNEL); | |
2340 | if (!buf) | |
2341 | return NULL; | |
2342 | ||
2343 | buf->ccontext.DataOffset = cpu_to_le16(offsetof | |
2344 | (struct crt_twarp_ctxt, Timestamp)); | |
2345 | buf->ccontext.DataLength = cpu_to_le32(8); | |
2346 | buf->ccontext.NameOffset = cpu_to_le16(offsetof | |
2347 | (struct crt_twarp_ctxt, Name)); | |
2348 | buf->ccontext.NameLength = cpu_to_le16(4); | |
2349 | /* SMB2_CREATE_TIMEWARP_TOKEN is "TWrp" */ | |
2350 | buf->Name[0] = 'T'; | |
2351 | buf->Name[1] = 'W'; | |
2352 | buf->Name[2] = 'r'; | |
2353 | buf->Name[3] = 'p'; | |
2354 | buf->Timestamp = cpu_to_le64(timewarp); | |
2355 | return buf; | |
2356 | } | |
2357 | ||
2358 | /* See MS-SMB2 2.2.13.2.7 */ | |
2359 | static int | |
2360 | add_twarp_context(struct kvec *iov, unsigned int *num_iovec, __u64 timewarp) | |
2361 | { | |
2362 | struct smb2_create_req *req = iov[0].iov_base; | |
2363 | unsigned int num = *num_iovec; | |
2364 | ||
2365 | iov[num].iov_base = create_twarp_buf(timewarp); | |
2366 | if (iov[num].iov_base == NULL) | |
2367 | return -ENOMEM; | |
2368 | iov[num].iov_len = sizeof(struct crt_twarp_ctxt); | |
2369 | if (!req->CreateContextsOffset) | |
2370 | req->CreateContextsOffset = cpu_to_le32( | |
2371 | sizeof(struct smb2_create_req) + | |
2372 | iov[num - 1].iov_len); | |
2373 | le32_add_cpu(&req->CreateContextsLength, sizeof(struct crt_twarp_ctxt)); | |
2374 | *num_iovec = num + 1; | |
2375 | return 0; | |
2376 | } | |
2377 | ||
975221ec SF |
2378 | /* See See http://technet.microsoft.com/en-us/library/hh509017(v=ws.10).aspx */ |
2379 | static void setup_owner_group_sids(char *buf) | |
2380 | { | |
2381 | struct owner_group_sids *sids = (struct owner_group_sids *)buf; | |
2382 | ||
2383 | /* Populate the user ownership fields S-1-5-88-1 */ | |
2384 | sids->owner.Revision = 1; | |
2385 | sids->owner.NumAuth = 3; | |
2386 | sids->owner.Authority[5] = 5; | |
2387 | sids->owner.SubAuthorities[0] = cpu_to_le32(88); | |
2388 | sids->owner.SubAuthorities[1] = cpu_to_le32(1); | |
2389 | sids->owner.SubAuthorities[2] = cpu_to_le32(current_fsuid().val); | |
2390 | ||
2391 | /* Populate the group ownership fields S-1-5-88-2 */ | |
2392 | sids->group.Revision = 1; | |
2393 | sids->group.NumAuth = 3; | |
2394 | sids->group.Authority[5] = 5; | |
2395 | sids->group.SubAuthorities[0] = cpu_to_le32(88); | |
2396 | sids->group.SubAuthorities[1] = cpu_to_le32(2); | |
2397 | sids->group.SubAuthorities[2] = cpu_to_le32(current_fsgid().val); | |
a7a519a4 SF |
2398 | |
2399 | 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 |
2400 | } |
2401 | ||
fdef665b SF |
2402 | /* See MS-SMB2 2.2.13.2.2 and MS-DTYP 2.4.6 */ |
2403 | static struct crt_sd_ctxt * | |
975221ec | 2404 | create_sd_buf(umode_t mode, bool set_owner, unsigned int *len) |
fdef665b SF |
2405 | { |
2406 | struct crt_sd_ctxt *buf; | |
ea64370b RS |
2407 | __u8 *ptr, *aclptr; |
2408 | unsigned int acelen, acl_size, ace_count; | |
975221ec SF |
2409 | unsigned int owner_offset = 0; |
2410 | unsigned int group_offset = 0; | |
ea64370b | 2411 | struct smb3_acl acl; |
975221ec | 2412 | |
ea64370b | 2413 | *len = roundup(sizeof(struct crt_sd_ctxt) + (sizeof(struct cifs_ace) * 4), 8); |
975221ec SF |
2414 | |
2415 | if (set_owner) { | |
975221ec SF |
2416 | /* sizeof(struct owner_group_sids) is already multiple of 8 so no need to round */ |
2417 | *len += sizeof(struct owner_group_sids); | |
2418 | } | |
fdef665b | 2419 | |
fdef665b SF |
2420 | buf = kzalloc(*len, GFP_KERNEL); |
2421 | if (buf == NULL) | |
2422 | return buf; | |
2423 | ||
ea64370b | 2424 | ptr = (__u8 *)&buf[1]; |
975221ec | 2425 | if (set_owner) { |
ea64370b RS |
2426 | /* offset fields are from beginning of security descriptor not of create context */ |
2427 | owner_offset = ptr - (__u8 *)&buf->sd; | |
975221ec | 2428 | buf->sd.OffsetOwner = cpu_to_le32(owner_offset); |
ea64370b | 2429 | group_offset = owner_offset + offsetof(struct owner_group_sids, group); |
975221ec | 2430 | buf->sd.OffsetGroup = cpu_to_le32(group_offset); |
ea64370b RS |
2431 | |
2432 | setup_owner_group_sids(ptr); | |
2433 | ptr += sizeof(struct owner_group_sids); | |
975221ec SF |
2434 | } else { |
2435 | buf->sd.OffsetOwner = 0; | |
2436 | buf->sd.OffsetGroup = 0; | |
2437 | } | |
2438 | ||
ea64370b | 2439 | buf->ccontext.DataOffset = cpu_to_le16(offsetof(struct crt_sd_ctxt, sd)); |
975221ec | 2440 | buf->ccontext.NameOffset = cpu_to_le16(offsetof(struct crt_sd_ctxt, Name)); |
fdef665b SF |
2441 | buf->ccontext.NameLength = cpu_to_le16(4); |
2442 | /* SMB2_CREATE_SD_BUFFER_TOKEN is "SecD" */ | |
2443 | buf->Name[0] = 'S'; | |
2444 | buf->Name[1] = 'e'; | |
2445 | buf->Name[2] = 'c'; | |
2446 | buf->Name[3] = 'D'; | |
2447 | buf->sd.Revision = 1; /* Must be one see MS-DTYP 2.4.6 */ | |
ea64370b | 2448 | |
fdef665b SF |
2449 | /* |
2450 | * ACL is "self relative" ie ACL is stored in contiguous block of memory | |
2451 | * and "DP" ie the DACL is present | |
2452 | */ | |
2453 | buf->sd.Control = cpu_to_le16(ACL_CONTROL_SR | ACL_CONTROL_DP); | |
2454 | ||
2455 | /* offset owner, group and Sbz1 and SACL are all zero */ | |
ea64370b RS |
2456 | buf->sd.OffsetDacl = cpu_to_le32(ptr - (__u8 *)&buf->sd); |
2457 | /* Ship the ACL for now. we will copy it into buf later. */ | |
2458 | aclptr = ptr; | |
b06d893e | 2459 | ptr += sizeof(struct smb3_acl); |
fdef665b SF |
2460 | |
2461 | /* create one ACE to hold the mode embedded in reserved special SID */ | |
ea64370b RS |
2462 | acelen = setup_special_mode_ACE((struct cifs_ace *)ptr, (__u64)mode); |
2463 | ptr += acelen; | |
2464 | acl_size = acelen + sizeof(struct smb3_acl); | |
2465 | ace_count = 1; | |
975221ec SF |
2466 | |
2467 | if (set_owner) { | |
2468 | /* we do not need to reallocate buffer to add the two more ACEs. plenty of space */ | |
ea64370b RS |
2469 | acelen = setup_special_user_owner_ACE((struct cifs_ace *)ptr); |
2470 | ptr += acelen; | |
2471 | acl_size += acelen; | |
2472 | ace_count += 1; | |
2473 | } | |
975221ec | 2474 | |
643fbcee | 2475 | /* and one more ACE to allow access for authenticated users */ |
ea64370b RS |
2476 | acelen = setup_authusers_ACE((struct cifs_ace *)ptr); |
2477 | ptr += acelen; | |
2478 | acl_size += acelen; | |
2479 | ace_count += 1; | |
2480 | ||
2481 | acl.AclRevision = ACL_REVISION; /* See 2.4.4.1 of MS-DTYP */ | |
2482 | acl.AclSize = cpu_to_le16(acl_size); | |
2483 | acl.AceCount = cpu_to_le16(ace_count); | |
b06d893e | 2484 | memcpy(aclptr, &acl, sizeof(struct smb3_acl)); |
ea64370b RS |
2485 | |
2486 | buf->ccontext.DataLength = cpu_to_le32(ptr - (__u8 *)&buf->sd); | |
7d3fc017 | 2487 | *len = roundup(ptr - (__u8 *)buf, 8); |
975221ec | 2488 | |
fdef665b SF |
2489 | return buf; |
2490 | } | |
2491 | ||
2492 | static int | |
975221ec | 2493 | add_sd_context(struct kvec *iov, unsigned int *num_iovec, umode_t mode, bool set_owner) |
fdef665b SF |
2494 | { |
2495 | struct smb2_create_req *req = iov[0].iov_base; | |
2496 | unsigned int num = *num_iovec; | |
2497 | unsigned int len = 0; | |
2498 | ||
975221ec | 2499 | iov[num].iov_base = create_sd_buf(mode, set_owner, &len); |
fdef665b SF |
2500 | if (iov[num].iov_base == NULL) |
2501 | return -ENOMEM; | |
2502 | iov[num].iov_len = len; | |
2503 | if (!req->CreateContextsOffset) | |
2504 | req->CreateContextsOffset = cpu_to_le32( | |
2505 | sizeof(struct smb2_create_req) + | |
2506 | iov[num - 1].iov_len); | |
2507 | le32_add_cpu(&req->CreateContextsLength, len); | |
2508 | *num_iovec = num + 1; | |
2509 | return 0; | |
2510 | } | |
2511 | ||
ff2a09e9 SF |
2512 | static struct crt_query_id_ctxt * |
2513 | create_query_id_buf(void) | |
2514 | { | |
2515 | struct crt_query_id_ctxt *buf; | |
2516 | ||
2517 | buf = kzalloc(sizeof(struct crt_query_id_ctxt), GFP_KERNEL); | |
2518 | if (!buf) | |
2519 | return NULL; | |
2520 | ||
2521 | buf->ccontext.DataOffset = cpu_to_le16(0); | |
2522 | buf->ccontext.DataLength = cpu_to_le32(0); | |
2523 | buf->ccontext.NameOffset = cpu_to_le16(offsetof | |
2524 | (struct crt_query_id_ctxt, Name)); | |
2525 | buf->ccontext.NameLength = cpu_to_le16(4); | |
2526 | /* SMB2_CREATE_QUERY_ON_DISK_ID is "QFid" */ | |
2527 | buf->Name[0] = 'Q'; | |
2528 | buf->Name[1] = 'F'; | |
2529 | buf->Name[2] = 'i'; | |
2530 | buf->Name[3] = 'd'; | |
2531 | return buf; | |
2532 | } | |
2533 | ||
2534 | /* See MS-SMB2 2.2.13.2.9 */ | |
2535 | static int | |
2536 | add_query_id_context(struct kvec *iov, unsigned int *num_iovec) | |
2537 | { | |
2538 | struct smb2_create_req *req = iov[0].iov_base; | |
2539 | unsigned int num = *num_iovec; | |
2540 | ||
2541 | iov[num].iov_base = create_query_id_buf(); | |
2542 | if (iov[num].iov_base == NULL) | |
2543 | return -ENOMEM; | |
2544 | iov[num].iov_len = sizeof(struct crt_query_id_ctxt); | |
2545 | if (!req->CreateContextsOffset) | |
2546 | req->CreateContextsOffset = cpu_to_le32( | |
2547 | sizeof(struct smb2_create_req) + | |
2548 | iov[num - 1].iov_len); | |
2549 | le32_add_cpu(&req->CreateContextsLength, sizeof(struct crt_query_id_ctxt)); | |
2550 | *num_iovec = num + 1; | |
2551 | return 0; | |
2552 | } | |
2553 | ||
f0712928 AA |
2554 | static int |
2555 | alloc_path_with_tree_prefix(__le16 **out_path, int *out_size, int *out_len, | |
2556 | const char *treename, const __le16 *path) | |
2557 | { | |
2558 | int treename_len, path_len; | |
2559 | struct nls_table *cp; | |
2560 | const __le16 sep[] = {cpu_to_le16('\\'), cpu_to_le16(0x0000)}; | |
2561 | ||
2562 | /* | |
2563 | * skip leading "\\" | |
2564 | */ | |
2565 | treename_len = strlen(treename); | |
2566 | if (treename_len < 2 || !(treename[0] == '\\' && treename[1] == '\\')) | |
2567 | return -EINVAL; | |
2568 | ||
2569 | treename += 2; | |
2570 | treename_len -= 2; | |
2571 | ||
2572 | path_len = UniStrnlen((wchar_t *)path, PATH_MAX); | |
2573 | ||
2574 | /* | |
2575 | * make room for one path separator between the treename and | |
2576 | * path | |
2577 | */ | |
2578 | *out_len = treename_len + 1 + path_len; | |
2579 | ||
2580 | /* | |
2581 | * final path needs to be null-terminated UTF16 with a | |
2582 | * size aligned to 8 | |
2583 | */ | |
2584 | ||
2585 | *out_size = roundup((*out_len+1)*2, 8); | |
2586 | *out_path = kzalloc(*out_size, GFP_KERNEL); | |
2587 | if (!*out_path) | |
2588 | return -ENOMEM; | |
2589 | ||
2590 | cp = load_nls_default(); | |
2591 | cifs_strtoUTF16(*out_path, treename, treename_len, cp); | |
7eacba3b EK |
2592 | |
2593 | /* Do not append the separator if the path is empty */ | |
2594 | if (path[0] != cpu_to_le16(0x0000)) { | |
2595 | UniStrcat(*out_path, sep); | |
2596 | UniStrcat(*out_path, path); | |
2597 | } | |
2598 | ||
f0712928 AA |
2599 | unload_nls(cp); |
2600 | ||
2601 | return 0; | |
2602 | } | |
2603 | ||
bea851b8 SF |
2604 | int smb311_posix_mkdir(const unsigned int xid, struct inode *inode, |
2605 | umode_t mode, struct cifs_tcon *tcon, | |
2606 | const char *full_path, | |
2607 | struct cifs_sb_info *cifs_sb) | |
2608 | { | |
2609 | struct smb_rqst rqst; | |
2610 | struct smb2_create_req *req; | |
256b4c3f | 2611 | struct smb2_create_rsp *rsp = NULL; |
bea851b8 SF |
2612 | struct cifs_ses *ses = tcon->ses; |
2613 | struct kvec iov[3]; /* make sure at least one for each open context */ | |
2614 | struct kvec rsp_iov = {NULL, 0}; | |
2615 | int resp_buftype; | |
2616 | int uni_path_len; | |
2617 | __le16 *copy_path = NULL; | |
2618 | int copy_size; | |
2619 | int rc = 0; | |
2620 | unsigned int n_iov = 2; | |
2621 | __u32 file_attributes = 0; | |
2622 | char *pc_buf = NULL; | |
2623 | int flags = 0; | |
2624 | unsigned int total_len; | |
256b4c3f | 2625 | __le16 *utf16_path = NULL; |
352d96f3 | 2626 | struct TCP_Server_Info *server = cifs_pick_channel(ses); |
bea851b8 SF |
2627 | |
2628 | cifs_dbg(FYI, "mkdir\n"); | |
2629 | ||
256b4c3f AA |
2630 | /* resource #1: path allocation */ |
2631 | utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb); | |
2632 | if (!utf16_path) | |
2633 | return -ENOMEM; | |
2634 | ||
352d96f3 | 2635 | if (!ses || !server) { |
256b4c3f AA |
2636 | rc = -EIO; |
2637 | goto err_free_path; | |
2638 | } | |
bea851b8 | 2639 | |
256b4c3f | 2640 | /* resource #2: request */ |
352d96f3 AA |
2641 | rc = smb2_plain_req_init(SMB2_CREATE, tcon, server, |
2642 | (void **) &req, &total_len); | |
bea851b8 | 2643 | if (rc) |
256b4c3f AA |
2644 | goto err_free_path; |
2645 | ||
bea851b8 SF |
2646 | |
2647 | if (smb3_encryption_required(tcon)) | |
2648 | flags |= CIFS_TRANSFORM_REQ; | |
2649 | ||
bea851b8 SF |
2650 | req->ImpersonationLevel = IL_IMPERSONATION; |
2651 | req->DesiredAccess = cpu_to_le32(FILE_WRITE_ATTRIBUTES); | |
2652 | /* File attributes ignored on open (used in create though) */ | |
2653 | req->FileAttributes = cpu_to_le32(file_attributes); | |
2654 | req->ShareAccess = FILE_SHARE_ALL_LE; | |
2655 | req->CreateDisposition = cpu_to_le32(FILE_CREATE); | |
2656 | req->CreateOptions = cpu_to_le32(CREATE_NOT_FILE); | |
2657 | ||
2658 | iov[0].iov_base = (char *)req; | |
2659 | /* -1 since last byte is buf[0] which is sent below (path) */ | |
2660 | iov[0].iov_len = total_len - 1; | |
2661 | ||
2662 | req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req)); | |
2663 | ||
2664 | /* [MS-SMB2] 2.2.13 NameOffset: | |
2665 | * If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of | |
2666 | * the SMB2 header, the file name includes a prefix that will | |
2667 | * be processed during DFS name normalization as specified in | |
2668 | * section 3.3.5.9. Otherwise, the file name is relative to | |
2669 | * the share that is identified by the TreeId in the SMB2 | |
2670 | * header. | |
2671 | */ | |
2672 | if (tcon->share_flags & SHI1005_FLAGS_DFS) { | |
2673 | int name_len; | |
2674 | ||
0d35e382 | 2675 | req->hdr.Flags |= SMB2_FLAGS_DFS_OPERATIONS; |
bea851b8 SF |
2676 | rc = alloc_path_with_tree_prefix(©_path, ©_size, |
2677 | &name_len, | |
256b4c3f AA |
2678 | tcon->treeName, utf16_path); |
2679 | if (rc) | |
2680 | goto err_free_req; | |
2681 | ||
bea851b8 SF |
2682 | req->NameLength = cpu_to_le16(name_len * 2); |
2683 | uni_path_len = copy_size; | |
256b4c3f AA |
2684 | /* free before overwriting resource */ |
2685 | kfree(utf16_path); | |
2686 | utf16_path = copy_path; | |
bea851b8 | 2687 | } else { |
256b4c3f | 2688 | uni_path_len = (2 * UniStrnlen((wchar_t *)utf16_path, PATH_MAX)) + 2; |
bea851b8 SF |
2689 | /* MUST set path len (NameLength) to 0 opening root of share */ |
2690 | req->NameLength = cpu_to_le16(uni_path_len - 2); | |
2691 | if (uni_path_len % 8 != 0) { | |
2692 | copy_size = roundup(uni_path_len, 8); | |
2693 | copy_path = kzalloc(copy_size, GFP_KERNEL); | |
2694 | if (!copy_path) { | |
256b4c3f AA |
2695 | rc = -ENOMEM; |
2696 | goto err_free_req; | |
bea851b8 | 2697 | } |
256b4c3f | 2698 | memcpy((char *)copy_path, (const char *)utf16_path, |
bea851b8 SF |
2699 | uni_path_len); |
2700 | uni_path_len = copy_size; | |
256b4c3f AA |
2701 | /* free before overwriting resource */ |
2702 | kfree(utf16_path); | |
2703 | utf16_path = copy_path; | |
bea851b8 SF |
2704 | } |
2705 | } | |
2706 | ||
2707 | iov[1].iov_len = uni_path_len; | |
256b4c3f | 2708 | iov[1].iov_base = utf16_path; |
bea851b8 SF |
2709 | req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_NONE; |
2710 | ||
2711 | if (tcon->posix_extensions) { | |
256b4c3f | 2712 | /* resource #3: posix buf */ |
bea851b8 | 2713 | rc = add_posix_context(iov, &n_iov, mode); |
256b4c3f AA |
2714 | if (rc) |
2715 | goto err_free_req; | |
bea851b8 SF |
2716 | pc_buf = iov[n_iov-1].iov_base; |
2717 | } | |
2718 | ||
2719 | ||
2720 | memset(&rqst, 0, sizeof(struct smb_rqst)); | |
2721 | rqst.rq_iov = iov; | |
2722 | rqst.rq_nvec = n_iov; | |
2723 | ||
d2f15428 | 2724 | /* no need to inc num_remote_opens because we close it just below */ |
efe2e9f3 SF |
2725 | trace_smb3_posix_mkdir_enter(xid, tcon->tid, ses->Suid, CREATE_NOT_FILE, |
2726 | FILE_WRITE_ATTRIBUTES); | |
256b4c3f | 2727 | /* resource #4: response buffer */ |
352d96f3 AA |
2728 | rc = cifs_send_recv(xid, ses, server, |
2729 | &rqst, &resp_buftype, flags, &rsp_iov); | |
256b4c3f | 2730 | if (rc) { |
bea851b8 SF |
2731 | cifs_stats_fail_inc(tcon, SMB2_CREATE_HE); |
2732 | trace_smb3_posix_mkdir_err(xid, tcon->tid, ses->Suid, | |
256b4c3f AA |
2733 | CREATE_NOT_FILE, |
2734 | FILE_WRITE_ATTRIBUTES, rc); | |
2735 | goto err_free_rsp_buf; | |
2736 | } | |
2737 | ||
ca780da5 SF |
2738 | /* |
2739 | * Although unlikely to be possible for rsp to be null and rc not set, | |
2740 | * adding check below is slightly safer long term (and quiets Coverity | |
2741 | * warning) | |
2742 | */ | |
256b4c3f | 2743 | rsp = (struct smb2_create_rsp *)rsp_iov.iov_base; |
ca780da5 SF |
2744 | if (rsp == NULL) { |
2745 | rc = -EIO; | |
2746 | kfree(pc_buf); | |
2747 | goto err_free_req; | |
2748 | } | |
2749 | ||
351a59da PA |
2750 | trace_smb3_posix_mkdir_done(xid, rsp->PersistentFileId, tcon->tid, ses->Suid, |
2751 | CREATE_NOT_FILE, FILE_WRITE_ATTRIBUTES); | |
bea851b8 | 2752 | |
351a59da | 2753 | SMB2_close(xid, tcon, rsp->PersistentFileId, rsp->VolatileFileId); |
bea851b8 SF |
2754 | |
2755 | /* Eventually save off posix specific response info and timestaps */ | |
2756 | ||
256b4c3f | 2757 | err_free_rsp_buf: |
bea851b8 | 2758 | free_rsp_buf(resp_buftype, rsp); |
256b4c3f AA |
2759 | kfree(pc_buf); |
2760 | err_free_req: | |
2761 | cifs_small_buf_release(req); | |
2762 | err_free_path: | |
2763 | kfree(utf16_path); | |
bea851b8 | 2764 | return rc; |
bea851b8 | 2765 | } |
bea851b8 | 2766 | |
2503a0db | 2767 | int |
352d96f3 AA |
2768 | SMB2_open_init(struct cifs_tcon *tcon, struct TCP_Server_Info *server, |
2769 | struct smb_rqst *rqst, __u8 *oplock, | |
1eb9fb52 | 2770 | struct cifs_open_parms *oparms, __le16 *path) |
2503a0db PS |
2771 | { |
2772 | struct smb2_create_req *req; | |
da502f7d | 2773 | unsigned int n_iov = 2; |
ca81983f | 2774 | __u32 file_attributes = 0; |
1eb9fb52 RS |
2775 | int copy_size; |
2776 | int uni_path_len; | |
4f33bc35 | 2777 | unsigned int total_len; |
1eb9fb52 RS |
2778 | struct kvec *iov = rqst->rq_iov; |
2779 | __le16 *copy_path; | |
2780 | int rc; | |
2503a0db | 2781 | |
352d96f3 AA |
2782 | rc = smb2_plain_req_init(SMB2_CREATE, tcon, server, |
2783 | (void **) &req, &total_len); | |
2503a0db PS |
2784 | if (rc) |
2785 | return rc; | |
2786 | ||
1eb9fb52 RS |
2787 | iov[0].iov_base = (char *)req; |
2788 | /* -1 since last byte is buf[0] which is sent below (path) */ | |
2789 | iov[0].iov_len = total_len - 1; | |
7fb8986e | 2790 | |
064f6047 | 2791 | if (oparms->create_options & CREATE_OPTION_READONLY) |
ca81983f | 2792 | file_attributes |= ATTR_READONLY; |
db8b631d SF |
2793 | if (oparms->create_options & CREATE_OPTION_SPECIAL) |
2794 | file_attributes |= ATTR_SYSTEM; | |
ca81983f | 2795 | |
2503a0db | 2796 | req->ImpersonationLevel = IL_IMPERSONATION; |
064f6047 | 2797 | req->DesiredAccess = cpu_to_le32(oparms->desired_access); |
2503a0db PS |
2798 | /* File attributes ignored on open (used in create though) */ |
2799 | req->FileAttributes = cpu_to_le32(file_attributes); | |
2800 | req->ShareAccess = FILE_SHARE_ALL_LE; | |
c3ca78e2 | 2801 | |
064f6047 PS |
2802 | req->CreateDisposition = cpu_to_le32(oparms->disposition); |
2803 | req->CreateOptions = cpu_to_le32(oparms->create_options & CREATE_OPTIONS_MASK); | |
4f33bc35 | 2804 | req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req)); |
f0712928 AA |
2805 | |
2806 | /* [MS-SMB2] 2.2.13 NameOffset: | |
2807 | * If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of | |
2808 | * the SMB2 header, the file name includes a prefix that will | |
2809 | * be processed during DFS name normalization as specified in | |
2810 | * section 3.3.5.9. Otherwise, the file name is relative to | |
2811 | * the share that is identified by the TreeId in the SMB2 | |
2812 | * header. | |
2813 | */ | |
2814 | if (tcon->share_flags & SHI1005_FLAGS_DFS) { | |
2815 | int name_len; | |
2816 | ||
0d35e382 | 2817 | req->hdr.Flags |= SMB2_FLAGS_DFS_OPERATIONS; |
f0712928 AA |
2818 | rc = alloc_path_with_tree_prefix(©_path, ©_size, |
2819 | &name_len, | |
2820 | tcon->treeName, path); | |
1eb9fb52 | 2821 | if (rc) |
f0712928 AA |
2822 | return rc; |
2823 | req->NameLength = cpu_to_le16(name_len * 2); | |
59aa3718 PS |
2824 | uni_path_len = copy_size; |
2825 | path = copy_path; | |
f0712928 AA |
2826 | } else { |
2827 | uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2; | |
2828 | /* MUST set path len (NameLength) to 0 opening root of share */ | |
2829 | req->NameLength = cpu_to_le16(uni_path_len - 2); | |
1eb9fb52 RS |
2830 | copy_size = uni_path_len; |
2831 | if (copy_size % 8 != 0) | |
2832 | copy_size = roundup(copy_size, 8); | |
2833 | copy_path = kzalloc(copy_size, GFP_KERNEL); | |
2834 | if (!copy_path) | |
2835 | return -ENOMEM; | |
2836 | memcpy((char *)copy_path, (const char *)path, | |
2837 | uni_path_len); | |
2838 | uni_path_len = copy_size; | |
2839 | path = copy_path; | |
2503a0db PS |
2840 | } |
2841 | ||
59aa3718 PS |
2842 | iov[1].iov_len = uni_path_len; |
2843 | iov[1].iov_base = path; | |
59aa3718 | 2844 | |
3e7a02d4 | 2845 | if ((!server->oplocks) || (tcon->no_lease)) |
b8c32dbb PS |
2846 | *oplock = SMB2_OPLOCK_LEVEL_NONE; |
2847 | ||
a41a28bd | 2848 | if (!(server->capabilities & SMB2_GLOBAL_CAP_LEASING) || |
b8c32dbb PS |
2849 | *oplock == SMB2_OPLOCK_LEVEL_NONE) |
2850 | req->RequestedOplockLevel = *oplock; | |
f8015683 SF |
2851 | else if (!(server->capabilities & SMB2_GLOBAL_CAP_DIRECTORY_LEASING) && |
2852 | (oparms->create_options & CREATE_NOT_FILE)) | |
2853 | req->RequestedOplockLevel = *oplock; /* no srv lease support */ | |
b8c32dbb | 2854 | else { |
729c0c9d SB |
2855 | rc = add_lease_context(server, iov, &n_iov, |
2856 | oparms->fid->lease_key, oplock); | |
1eb9fb52 | 2857 | if (rc) |
d22cbfec | 2858 | return rc; |
b8c32dbb PS |
2859 | } |
2860 | ||
63eb3def PS |
2861 | if (*oplock == SMB2_OPLOCK_LEVEL_BATCH) { |
2862 | /* need to set Next field of lease context if we request it */ | |
a41a28bd | 2863 | if (server->capabilities & SMB2_GLOBAL_CAP_LEASING) { |
63eb3def | 2864 | struct create_context *ccontext = |
da502f7d | 2865 | (struct create_context *)iov[n_iov-1].iov_base; |
1c46943f | 2866 | ccontext->Next = |
a41a28bd | 2867 | cpu_to_le32(server->vals->create_lease_size); |
63eb3def | 2868 | } |
b56eae4d | 2869 | |
da502f7d | 2870 | rc = add_durable_context(iov, &n_iov, oparms, |
b56eae4d | 2871 | tcon->use_persistent); |
1eb9fb52 | 2872 | if (rc) |
63eb3def | 2873 | return rc; |
63eb3def PS |
2874 | } |
2875 | ||
ce558b0e SF |
2876 | if (tcon->posix_extensions) { |
2877 | if (n_iov > 2) { | |
2878 | struct create_context *ccontext = | |
2879 | (struct create_context *)iov[n_iov-1].iov_base; | |
2880 | ccontext->Next = | |
2881 | cpu_to_le32(iov[n_iov-1].iov_len); | |
2882 | } | |
2883 | ||
2884 | rc = add_posix_context(iov, &n_iov, oparms->mode); | |
1eb9fb52 | 2885 | if (rc) |
ce558b0e | 2886 | return rc; |
ce558b0e | 2887 | } |
ce558b0e | 2888 | |
cdeaf9d0 SF |
2889 | if (tcon->snapshot_time) { |
2890 | cifs_dbg(FYI, "adding snapshot context\n"); | |
2891 | if (n_iov > 2) { | |
2892 | struct create_context *ccontext = | |
2893 | (struct create_context *)iov[n_iov-1].iov_base; | |
2894 | ccontext->Next = | |
2895 | cpu_to_le32(iov[n_iov-1].iov_len); | |
2896 | } | |
2897 | ||
2898 | rc = add_twarp_context(iov, &n_iov, tcon->snapshot_time); | |
2899 | if (rc) | |
2900 | return rc; | |
2901 | } | |
2902 | ||
975221ec SF |
2903 | if ((oparms->disposition != FILE_OPEN) && (oparms->cifs_sb)) { |
2904 | bool set_mode; | |
2905 | bool set_owner; | |
2906 | ||
2907 | if ((oparms->cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID) && | |
2908 | (oparms->mode != ACL_NO_MODE)) | |
2909 | set_mode = true; | |
2910 | else { | |
2911 | set_mode = false; | |
2912 | oparms->mode = ACL_NO_MODE; | |
c3ca78e2 SF |
2913 | } |
2914 | ||
975221ec SF |
2915 | if (oparms->cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UID_FROM_ACL) |
2916 | set_owner = true; | |
2917 | else | |
2918 | set_owner = false; | |
2919 | ||
2920 | if (set_owner | set_mode) { | |
2921 | if (n_iov > 2) { | |
2922 | struct create_context *ccontext = | |
2923 | (struct create_context *)iov[n_iov-1].iov_base; | |
2924 | ccontext->Next = cpu_to_le32(iov[n_iov-1].iov_len); | |
2925 | } | |
2926 | ||
2927 | cifs_dbg(FYI, "add sd with mode 0x%x\n", oparms->mode); | |
2928 | rc = add_sd_context(iov, &n_iov, oparms->mode, set_owner); | |
2929 | if (rc) | |
2930 | return rc; | |
2931 | } | |
c3ca78e2 SF |
2932 | } |
2933 | ||
ff2a09e9 SF |
2934 | if (n_iov > 2) { |
2935 | struct create_context *ccontext = | |
2936 | (struct create_context *)iov[n_iov-1].iov_base; | |
2937 | ccontext->Next = cpu_to_le32(iov[n_iov-1].iov_len); | |
2938 | } | |
2939 | add_query_id_context(iov, &n_iov); | |
cdeaf9d0 | 2940 | |
1eb9fb52 RS |
2941 | rqst->rq_nvec = n_iov; |
2942 | return 0; | |
2943 | } | |
2944 | ||
2945 | /* rq_iov[0] is the request and is released by cifs_small_buf_release(). | |
2946 | * All other vectors are freed by kfree(). | |
2947 | */ | |
2948 | void | |
2949 | SMB2_open_free(struct smb_rqst *rqst) | |
2950 | { | |
2951 | int i; | |
2952 | ||
32a1fb36 RS |
2953 | if (rqst && rqst->rq_iov) { |
2954 | cifs_small_buf_release(rqst->rq_iov[0].iov_base); | |
2955 | for (i = 1; i < rqst->rq_nvec; i++) | |
2956 | if (rqst->rq_iov[i].iov_base != smb2_padding) | |
2957 | kfree(rqst->rq_iov[i].iov_base); | |
2958 | } | |
1eb9fb52 RS |
2959 | } |
2960 | ||
2961 | int | |
2962 | SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path, | |
2963 | __u8 *oplock, struct smb2_file_all_info *buf, | |
69dda305 | 2964 | struct create_posix_rsp *posix, |
1eb9fb52 RS |
2965 | struct kvec *err_iov, int *buftype) |
2966 | { | |
2967 | struct smb_rqst rqst; | |
2968 | struct smb2_create_rsp *rsp = NULL; | |
1eb9fb52 RS |
2969 | struct cifs_tcon *tcon = oparms->tcon; |
2970 | struct cifs_ses *ses = tcon->ses; | |
352d96f3 | 2971 | struct TCP_Server_Info *server = cifs_pick_channel(ses); |
4d8dfafc | 2972 | struct kvec iov[SMB2_CREATE_IOV_SIZE]; |
1eb9fb52 | 2973 | struct kvec rsp_iov = {NULL, 0}; |
ef2298a0 | 2974 | int resp_buftype = CIFS_NO_BUFFER; |
1eb9fb52 RS |
2975 | int rc = 0; |
2976 | int flags = 0; | |
2977 | ||
2978 | cifs_dbg(FYI, "create/open\n"); | |
352d96f3 | 2979 | if (!ses || !server) |
1eb9fb52 RS |
2980 | return -EIO; |
2981 | ||
2982 | if (smb3_encryption_required(tcon)) | |
2983 | flags |= CIFS_TRANSFORM_REQ; | |
2984 | ||
40eff45b | 2985 | memset(&rqst, 0, sizeof(struct smb_rqst)); |
1eb9fb52 | 2986 | memset(&iov, 0, sizeof(iov)); |
40eff45b | 2987 | rqst.rq_iov = iov; |
4d8dfafc | 2988 | rqst.rq_nvec = SMB2_CREATE_IOV_SIZE; |
1eb9fb52 | 2989 | |
352d96f3 AA |
2990 | rc = SMB2_open_init(tcon, server, |
2991 | &rqst, oplock, oparms, path); | |
1eb9fb52 RS |
2992 | if (rc) |
2993 | goto creat_exit; | |
40eff45b | 2994 | |
efe2e9f3 SF |
2995 | trace_smb3_open_enter(xid, tcon->tid, tcon->ses->Suid, |
2996 | oparms->create_options, oparms->desired_access); | |
2997 | ||
352d96f3 AA |
2998 | rc = cifs_send_recv(xid, ses, server, |
2999 | &rqst, &resp_buftype, flags, | |
4f33bc35 | 3000 | &rsp_iov); |
da502f7d | 3001 | rsp = (struct smb2_create_rsp *)rsp_iov.iov_base; |
2503a0db PS |
3002 | |
3003 | if (rc != 0) { | |
3004 | cifs_stats_fail_inc(tcon, SMB2_CREATE_HE); | |
91cb74f5 RS |
3005 | if (err_iov && rsp) { |
3006 | *err_iov = rsp_iov; | |
9d874c36 | 3007 | *buftype = resp_buftype; |
91cb74f5 RS |
3008 | resp_buftype = CIFS_NO_BUFFER; |
3009 | rsp = NULL; | |
3010 | } | |
28d59363 SF |
3011 | trace_smb3_open_err(xid, tcon->tid, ses->Suid, |
3012 | oparms->create_options, oparms->desired_access, rc); | |
7dcc82c2 | 3013 | if (rc == -EREMCHG) { |
a0a3036b JP |
3014 | pr_warn_once("server share %s deleted\n", |
3015 | tcon->treeName); | |
7dcc82c2 SF |
3016 | tcon->need_reconnect = true; |
3017 | } | |
2503a0db | 3018 | goto creat_exit; |
6b789518 SF |
3019 | } else if (rsp == NULL) /* unlikely to happen, but safer to check */ |
3020 | goto creat_exit; | |
3021 | else | |
351a59da PA |
3022 | trace_smb3_open_done(xid, rsp->PersistentFileId, tcon->tid, ses->Suid, |
3023 | oparms->create_options, oparms->desired_access); | |
2503a0db | 3024 | |
fae8044c | 3025 | atomic_inc(&tcon->num_remote_opens); |
351a59da PA |
3026 | oparms->fid->persistent_fid = rsp->PersistentFileId; |
3027 | oparms->fid->volatile_fid = rsp->VolatileFileId; | |
86f740f2 | 3028 | oparms->fid->access = oparms->desired_access; |
dfe33f9a | 3029 | #ifdef CONFIG_CIFS_DEBUG2 |
0d35e382 | 3030 | oparms->fid->mid = le64_to_cpu(rsp->hdr.MessageId); |
dfe33f9a | 3031 | #endif /* CIFS_DEBUG2 */ |
f0df737e PS |
3032 | |
3033 | if (buf) { | |
fbcff33d KC |
3034 | buf->CreationTime = rsp->CreationTime; |
3035 | buf->LastAccessTime = rsp->LastAccessTime; | |
3036 | buf->LastWriteTime = rsp->LastWriteTime; | |
3037 | buf->ChangeTime = rsp->ChangeTime; | |
f0df737e PS |
3038 | buf->AllocationSize = rsp->AllocationSize; |
3039 | buf->EndOfFile = rsp->EndofFile; | |
3040 | buf->Attributes = rsp->FileAttributes; | |
3041 | buf->NumberOfLinks = cpu_to_le32(1); | |
3042 | buf->DeletePending = 0; | |
3043 | } | |
2e44b288 | 3044 | |
89a5bfa3 SF |
3045 | |
3046 | smb2_parse_contexts(server, rsp, &oparms->fid->epoch, | |
69dda305 | 3047 | oparms->fid->lease_key, oplock, buf, posix); |
2503a0db | 3048 | creat_exit: |
1eb9fb52 | 3049 | SMB2_open_free(&rqst); |
2503a0db PS |
3050 | free_rsp_buf(resp_buftype, rsp); |
3051 | return rc; | |
3052 | } | |
3053 | ||
4a72dafa | 3054 | int |
352d96f3 AA |
3055 | SMB2_ioctl_init(struct cifs_tcon *tcon, struct TCP_Server_Info *server, |
3056 | struct smb_rqst *rqst, | |
ccdc77a3 | 3057 | u64 persistent_fid, u64 volatile_fid, u32 opcode, |
153322f7 SF |
3058 | bool is_fsctl, char *in_data, u32 indatalen, |
3059 | __u32 max_response_size) | |
4a72dafa SF |
3060 | { |
3061 | struct smb2_ioctl_req *req; | |
ccdc77a3 | 3062 | struct kvec *iov = rqst->rq_iov; |
97754680 | 3063 | unsigned int total_len; |
ccdc77a3 | 3064 | int rc; |
2c87d6a9 | 3065 | char *in_data_buf; |
4a72dafa | 3066 | |
352d96f3 AA |
3067 | rc = smb2_ioctl_req_init(opcode, tcon, server, |
3068 | (void **) &req, &total_len); | |
4a72dafa SF |
3069 | if (rc) |
3070 | return rc; | |
3071 | ||
2c87d6a9 LL |
3072 | if (indatalen) { |
3073 | /* | |
3074 | * indatalen is usually small at a couple of bytes max, so | |
3075 | * just allocate through generic pool | |
3076 | */ | |
d81f0974 | 3077 | in_data_buf = kmemdup(in_data, indatalen, GFP_NOFS); |
2c87d6a9 LL |
3078 | if (!in_data_buf) { |
3079 | cifs_small_buf_release(req); | |
3080 | return -ENOMEM; | |
3081 | } | |
2c87d6a9 LL |
3082 | } |
3083 | ||
4a72dafa SF |
3084 | req->CtlCode = cpu_to_le32(opcode); |
3085 | req->PersistentFileId = persistent_fid; | |
3086 | req->VolatileFileId = volatile_fid; | |
3087 | ||
ccdc77a3 RS |
3088 | iov[0].iov_base = (char *)req; |
3089 | /* | |
3090 | * If no input data, the size of ioctl struct in | |
3091 | * protocol spec still includes a 1 byte data buffer, | |
3092 | * but if input data passed to ioctl, we do not | |
3093 | * want to double count this, so we do not send | |
3094 | * the dummy one byte of data in iovec[0] if sending | |
3095 | * input data (in iovec[1]). | |
3096 | */ | |
4a72dafa SF |
3097 | if (indatalen) { |
3098 | req->InputCount = cpu_to_le32(indatalen); | |
3099 | /* do not set InputOffset if no input data */ | |
3100 | req->InputOffset = | |
97754680 | 3101 | cpu_to_le32(offsetof(struct smb2_ioctl_req, Buffer)); |
ccdc77a3 RS |
3102 | rqst->rq_nvec = 2; |
3103 | iov[0].iov_len = total_len - 1; | |
2c87d6a9 | 3104 | iov[1].iov_base = in_data_buf; |
4a72dafa | 3105 | iov[1].iov_len = indatalen; |
ccdc77a3 RS |
3106 | } else { |
3107 | rqst->rq_nvec = 1; | |
3108 | iov[0].iov_len = total_len; | |
3109 | } | |
4a72dafa SF |
3110 | |
3111 | req->OutputOffset = 0; | |
3112 | req->OutputCount = 0; /* MBZ */ | |
3113 | ||
3114 | /* | |
153322f7 SF |
3115 | * In most cases max_response_size is set to 16K (CIFSMaxBufSize) |
3116 | * We Could increase default MaxOutputResponse, but that could require | |
3117 | * more credits. Windows typically sets this smaller, but for some | |
4a72dafa SF |
3118 | * ioctls it may be useful to allow server to send more. No point |
3119 | * limiting what the server can send as long as fits in one credit | |
153322f7 SF |
3120 | * We can not handle more than CIFS_MAX_BUF_SIZE yet but may want |
3121 | * to increase this limit up in the future. | |
3122 | * Note that for snapshot queries that servers like Azure expect that | |
3123 | * the first query be minimal size (and just used to get the number/size | |
3124 | * of previous versions) so response size must be specified as EXACTLY | |
3125 | * sizeof(struct snapshot_array) which is 16 when rounded up to multiple | |
3126 | * of eight bytes. Currently that is the only case where we set max | |
3127 | * response size smaller. | |
4a72dafa | 3128 | */ |
153322f7 | 3129 | req->MaxOutputResponse = cpu_to_le32(max_response_size); |
0d35e382 | 3130 | req->hdr.CreditCharge = |
ebf57440 NJ |
3131 | cpu_to_le16(DIV_ROUND_UP(max(indatalen, max_response_size), |
3132 | SMB2_MAX_BUFFER_SIZE)); | |
4a72dafa SF |
3133 | if (is_fsctl) |
3134 | req->Flags = cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL); | |
3135 | else | |
3136 | req->Flags = 0; | |
3137 | ||
4587eee0 SF |
3138 | /* validate negotiate request must be signed - see MS-SMB2 3.2.5.5 */ |
3139 | if (opcode == FSCTL_VALIDATE_NEGOTIATE_INFO) | |
0d35e382 | 3140 | req->hdr.Flags |= SMB2_FLAGS_SIGNED; |
4a72dafa | 3141 | |
ccdc77a3 RS |
3142 | return 0; |
3143 | } | |
3144 | ||
3145 | void | |
3146 | SMB2_ioctl_free(struct smb_rqst *rqst) | |
3147 | { | |
6457c20e | 3148 | int i; |
2c87d6a9 | 3149 | if (rqst && rqst->rq_iov) { |
ccdc77a3 | 3150 | cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */ |
6457c20e MZ |
3151 | for (i = 1; i < rqst->rq_nvec; i++) |
3152 | if (rqst->rq_iov[i].iov_base != smb2_padding) | |
3153 | kfree(rqst->rq_iov[i].iov_base); | |
2c87d6a9 | 3154 | } |
ccdc77a3 RS |
3155 | } |
3156 | ||
153322f7 | 3157 | |
ccdc77a3 RS |
3158 | /* |
3159 | * SMB2 IOCTL is used for both IOCTLs and FSCTLs | |
3160 | */ | |
3161 | int | |
3162 | SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, | |
3163 | u64 volatile_fid, u32 opcode, bool is_fsctl, | |
153322f7 | 3164 | char *in_data, u32 indatalen, u32 max_out_data_len, |
ccdc77a3 RS |
3165 | char **out_data, u32 *plen /* returned data len */) |
3166 | { | |
3167 | struct smb_rqst rqst; | |
3168 | struct smb2_ioctl_rsp *rsp = NULL; | |
3169 | struct cifs_ses *ses; | |
352d96f3 | 3170 | struct TCP_Server_Info *server; |
72c419d9 | 3171 | struct kvec iov[SMB2_IOCTL_IOV_SIZE]; |
ccdc77a3 RS |
3172 | struct kvec rsp_iov = {NULL, 0}; |
3173 | int resp_buftype = CIFS_NO_BUFFER; | |
3174 | int rc = 0; | |
3175 | int flags = 0; | |
3176 | ||
3177 | cifs_dbg(FYI, "SMB2 IOCTL\n"); | |
3178 | ||
3179 | if (out_data != NULL) | |
3180 | *out_data = NULL; | |
3181 | ||
3182 | /* zero out returned data len, in case of error */ | |
3183 | if (plen) | |
3184 | *plen = 0; | |
3185 | ||
352d96f3 | 3186 | if (!tcon) |
ccdc77a3 RS |
3187 | return -EIO; |
3188 | ||
352d96f3 | 3189 | ses = tcon->ses; |
ac6ad7a8 CIK |
3190 | if (!ses) |
3191 | return -EIO; | |
352d96f3 AA |
3192 | |
3193 | server = cifs_pick_channel(ses); | |
ac6ad7a8 | 3194 | if (!server) |
ccdc77a3 RS |
3195 | return -EIO; |
3196 | ||
3197 | if (smb3_encryption_required(tcon)) | |
3198 | flags |= CIFS_TRANSFORM_REQ; | |
3199 | ||
40eff45b | 3200 | memset(&rqst, 0, sizeof(struct smb_rqst)); |
ccdc77a3 | 3201 | memset(&iov, 0, sizeof(iov)); |
40eff45b | 3202 | rqst.rq_iov = iov; |
72c419d9 | 3203 | rqst.rq_nvec = SMB2_IOCTL_IOV_SIZE; |
ccdc77a3 | 3204 | |
352d96f3 AA |
3205 | rc = SMB2_ioctl_init(tcon, server, |
3206 | &rqst, persistent_fid, volatile_fid, opcode, | |
153322f7 | 3207 | is_fsctl, in_data, indatalen, max_out_data_len); |
ccdc77a3 RS |
3208 | if (rc) |
3209 | goto ioctl_exit; | |
40eff45b | 3210 | |
352d96f3 AA |
3211 | rc = cifs_send_recv(xid, ses, server, |
3212 | &rqst, &resp_buftype, flags, | |
97754680 | 3213 | &rsp_iov); |
da502f7d | 3214 | rsp = (struct smb2_ioctl_rsp *)rsp_iov.iov_base; |
4a72dafa | 3215 | |
eccb4422 SF |
3216 | if (rc != 0) |
3217 | trace_smb3_fsctl_err(xid, persistent_fid, tcon->tid, | |
3218 | ses->Suid, 0, opcode, rc); | |
3219 | ||
2f3ebaba | 3220 | if ((rc != 0) && (rc != -EINVAL) && (rc != -E2BIG)) { |
8e353106 | 3221 | cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE); |
4a72dafa | 3222 | goto ioctl_exit; |
9bf0c9cd SF |
3223 | } else if (rc == -EINVAL) { |
3224 | if ((opcode != FSCTL_SRV_COPYCHUNK_WRITE) && | |
3225 | (opcode != FSCTL_SRV_COPYCHUNK)) { | |
8e353106 | 3226 | cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE); |
9bf0c9cd SF |
3227 | goto ioctl_exit; |
3228 | } | |
2f3ebaba RS |
3229 | } else if (rc == -E2BIG) { |
3230 | if (opcode != FSCTL_QUERY_ALLOCATED_RANGES) { | |
3231 | cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE); | |
3232 | goto ioctl_exit; | |
3233 | } | |
4a72dafa SF |
3234 | } |
3235 | ||
3236 | /* check if caller wants to look at return data or just return rc */ | |
3237 | if ((plen == NULL) || (out_data == NULL)) | |
3238 | goto ioctl_exit; | |
3239 | ||
4d9beec2 SF |
3240 | /* |
3241 | * Although unlikely to be possible for rsp to be null and rc not set, | |
3242 | * adding check below is slightly safer long term (and quiets Coverity | |
3243 | * warning) | |
3244 | */ | |
3245 | if (rsp == NULL) { | |
3246 | rc = -EIO; | |
3247 | goto ioctl_exit; | |
3248 | } | |
3249 | ||
4a72dafa SF |
3250 | *plen = le32_to_cpu(rsp->OutputCount); |
3251 | ||
3252 | /* We check for obvious errors in the output buffer length and offset */ | |
3253 | if (*plen == 0) | |
3254 | goto ioctl_exit; /* server returned no data */ | |
2d204ee9 | 3255 | else if (*plen > rsp_iov.iov_len || *plen > 0xFF00) { |
3175eb9b | 3256 | cifs_tcon_dbg(VFS, "srv returned invalid ioctl length: %d\n", *plen); |
4a72dafa SF |
3257 | *plen = 0; |
3258 | rc = -EIO; | |
3259 | goto ioctl_exit; | |
3260 | } | |
3261 | ||
2d204ee9 | 3262 | if (rsp_iov.iov_len - *plen < le32_to_cpu(rsp->OutputOffset)) { |
3175eb9b | 3263 | cifs_tcon_dbg(VFS, "Malformed ioctl resp: len %d offset %d\n", *plen, |
4a72dafa SF |
3264 | le32_to_cpu(rsp->OutputOffset)); |
3265 | *plen = 0; | |
3266 | rc = -EIO; | |
3267 | goto ioctl_exit; | |
3268 | } | |
3269 | ||
d034feeb Y |
3270 | *out_data = kmemdup((char *)rsp + le32_to_cpu(rsp->OutputOffset), |
3271 | *plen, GFP_KERNEL); | |
4a72dafa SF |
3272 | if (*out_data == NULL) { |
3273 | rc = -ENOMEM; | |
3274 | goto ioctl_exit; | |
3275 | } | |
3276 | ||
4a72dafa | 3277 | ioctl_exit: |
ccdc77a3 | 3278 | SMB2_ioctl_free(&rqst); |
4a72dafa SF |
3279 | free_rsp_buf(resp_buftype, rsp); |
3280 | return rc; | |
3281 | } | |
3282 | ||
64a5cfa6 SF |
3283 | /* |
3284 | * Individual callers to ioctl worker function follow | |
3285 | */ | |
3286 | ||
3287 | int | |
3288 | SMB2_set_compression(const unsigned int xid, struct cifs_tcon *tcon, | |
3289 | u64 persistent_fid, u64 volatile_fid) | |
3290 | { | |
3291 | int rc; | |
64a5cfa6 SF |
3292 | struct compress_ioctl fsctl_input; |
3293 | char *ret_data = NULL; | |
3294 | ||
3295 | fsctl_input.CompressionState = | |
bc09d141 | 3296 | cpu_to_le16(COMPRESSION_FORMAT_DEFAULT); |
64a5cfa6 SF |
3297 | |
3298 | rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid, | |
3299 | FSCTL_SET_COMPRESSION, true /* is_fsctl */, | |
3300 | (char *)&fsctl_input /* data input */, | |
153322f7 SF |
3301 | 2 /* in data len */, CIFSMaxBufSize /* max out data */, |
3302 | &ret_data /* out data */, NULL); | |
64a5cfa6 SF |
3303 | |
3304 | cifs_dbg(FYI, "set compression rc %d\n", rc); | |
64a5cfa6 SF |
3305 | |
3306 | return rc; | |
3307 | } | |
3308 | ||
8eb4ecfa | 3309 | int |
352d96f3 AA |
3310 | SMB2_close_init(struct cifs_tcon *tcon, struct TCP_Server_Info *server, |
3311 | struct smb_rqst *rqst, | |
43f8a6a7 | 3312 | u64 persistent_fid, u64 volatile_fid, bool query_attrs) |
8eb4ecfa RS |
3313 | { |
3314 | struct smb2_close_req *req; | |
3315 | struct kvec *iov = rqst->rq_iov; | |
3316 | unsigned int total_len; | |
3317 | int rc; | |
3318 | ||
352d96f3 AA |
3319 | rc = smb2_plain_req_init(SMB2_CLOSE, tcon, server, |
3320 | (void **) &req, &total_len); | |
8eb4ecfa RS |
3321 | if (rc) |
3322 | return rc; | |
3323 | ||
351a59da PA |
3324 | req->PersistentFileId = persistent_fid; |
3325 | req->VolatileFileId = volatile_fid; | |
43f8a6a7 SF |
3326 | if (query_attrs) |
3327 | req->Flags = SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB; | |
3328 | else | |
3329 | req->Flags = 0; | |
8eb4ecfa RS |
3330 | iov[0].iov_base = (char *)req; |
3331 | iov[0].iov_len = total_len; | |
3332 | ||
3333 | return 0; | |
3334 | } | |
3335 | ||
3336 | void | |
3337 | SMB2_close_free(struct smb_rqst *rqst) | |
3338 | { | |
32a1fb36 RS |
3339 | if (rqst && rqst->rq_iov) |
3340 | cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */ | |
8eb4ecfa RS |
3341 | } |
3342 | ||
2503a0db | 3343 | int |
43f8a6a7 SF |
3344 | __SMB2_close(const unsigned int xid, struct cifs_tcon *tcon, |
3345 | u64 persistent_fid, u64 volatile_fid, | |
3346 | struct smb2_file_network_open_info *pbuf) | |
2503a0db | 3347 | { |
40eff45b | 3348 | struct smb_rqst rqst; |
8eb4ecfa | 3349 | struct smb2_close_rsp *rsp = NULL; |
2503a0db | 3350 | struct cifs_ses *ses = tcon->ses; |
352d96f3 | 3351 | struct TCP_Server_Info *server = cifs_pick_channel(ses); |
2503a0db | 3352 | struct kvec iov[1]; |
da502f7d | 3353 | struct kvec rsp_iov; |
ef2298a0 | 3354 | int resp_buftype = CIFS_NO_BUFFER; |
2503a0db | 3355 | int rc = 0; |
9e8fae25 | 3356 | int flags = 0; |
43f8a6a7 | 3357 | bool query_attrs = false; |
2503a0db | 3358 | |
f96637be | 3359 | cifs_dbg(FYI, "Close\n"); |
2503a0db | 3360 | |
352d96f3 | 3361 | if (!ses || !server) |
2503a0db PS |
3362 | return -EIO; |
3363 | ||
5a77e75f | 3364 | if (smb3_encryption_required(tcon)) |
7fb8986e PS |
3365 | flags |= CIFS_TRANSFORM_REQ; |
3366 | ||
40eff45b | 3367 | memset(&rqst, 0, sizeof(struct smb_rqst)); |
8eb4ecfa | 3368 | memset(&iov, 0, sizeof(iov)); |
40eff45b RS |
3369 | rqst.rq_iov = iov; |
3370 | rqst.rq_nvec = 1; | |
3371 | ||
43f8a6a7 SF |
3372 | /* check if need to ask server to return timestamps in close response */ |
3373 | if (pbuf) | |
3374 | query_attrs = true; | |
3375 | ||
f90f9797 | 3376 | trace_smb3_close_enter(xid, persistent_fid, tcon->tid, ses->Suid); |
352d96f3 AA |
3377 | rc = SMB2_close_init(tcon, server, |
3378 | &rqst, persistent_fid, volatile_fid, | |
43f8a6a7 | 3379 | query_attrs); |
8eb4ecfa RS |
3380 | if (rc) |
3381 | goto close_exit; | |
3382 | ||
352d96f3 AA |
3383 | rc = cifs_send_recv(xid, ses, server, |
3384 | &rqst, &resp_buftype, flags, &rsp_iov); | |
da502f7d | 3385 | rsp = (struct smb2_close_rsp *)rsp_iov.iov_base; |
2503a0db PS |
3386 | |
3387 | if (rc != 0) { | |
d4a029d2 | 3388 | cifs_stats_fail_inc(tcon, SMB2_CLOSE_HE); |
eccb4422 SF |
3389 | trace_smb3_close_err(xid, persistent_fid, tcon->tid, ses->Suid, |
3390 | rc); | |
2503a0db | 3391 | goto close_exit; |
43f8a6a7 | 3392 | } else { |
f90f9797 SF |
3393 | trace_smb3_close_done(xid, persistent_fid, tcon->tid, |
3394 | ses->Suid); | |
43f8a6a7 SF |
3395 | /* |
3396 | * Note that have to subtract 4 since struct network_open_info | |
3397 | * has a final 4 byte pad that close response does not have | |
3398 | */ | |
3399 | if (pbuf) | |
3400 | memcpy(pbuf, (char *)&rsp->CreationTime, sizeof(*pbuf) - 4); | |
3401 | } | |
2503a0db | 3402 | |
fae8044c | 3403 | atomic_dec(&tcon->num_remote_opens); |
2503a0db | 3404 | close_exit: |
8eb4ecfa | 3405 | SMB2_close_free(&rqst); |
2503a0db | 3406 | free_rsp_buf(resp_buftype, rsp); |
9150c3ad PS |
3407 | |
3408 | /* retry close in a worker thread if this one is interrupted */ | |
2659d3bf | 3409 | if (is_interrupt_error(rc)) { |
9e8fae25 SF |
3410 | int tmp_rc; |
3411 | ||
9150c3ad PS |
3412 | tmp_rc = smb2_handle_cancelled_close(tcon, persistent_fid, |
3413 | volatile_fid); | |
3414 | if (tmp_rc) | |
3415 | cifs_dbg(VFS, "handle cancelled close fid 0x%llx returned error %d\n", | |
3416 | persistent_fid, tmp_rc); | |
3417 | } | |
9150c3ad | 3418 | return rc; |
97ca1762 RS |
3419 | } |
3420 | ||
43f8a6a7 SF |
3421 | int |
3422 | SMB2_close(const unsigned int xid, struct cifs_tcon *tcon, | |
3423 | u64 persistent_fid, u64 volatile_fid) | |
3424 | { | |
3425 | return __SMB2_close(xid, tcon, persistent_fid, volatile_fid, NULL); | |
3426 | } | |
3427 | ||
730928c8 RS |
3428 | int |
3429 | smb2_validate_iov(unsigned int offset, unsigned int buffer_length, | |
3430 | struct kvec *iov, unsigned int min_buf_size) | |
be4cb9e3 | 3431 | { |
c1596ff5 | 3432 | unsigned int smb_len = iov->iov_len; |
1fc6ad2f RS |
3433 | char *end_of_smb = smb_len + (char *)iov->iov_base; |
3434 | char *begin_of_buf = offset + (char *)iov->iov_base; | |
be4cb9e3 PS |
3435 | char *end_of_buf = begin_of_buf + buffer_length; |
3436 | ||
3437 | ||
3438 | if (buffer_length < min_buf_size) { | |
f96637be JP |
3439 | cifs_dbg(VFS, "buffer length %d smaller than minimum size %d\n", |
3440 | buffer_length, min_buf_size); | |
be4cb9e3 PS |
3441 | return -EINVAL; |
3442 | } | |
3443 | ||
3444 | /* check if beyond RFC1001 maximum length */ | |
3445 | if ((smb_len > 0x7FFFFF) || (buffer_length > 0x7FFFFF)) { | |
f96637be JP |
3446 | cifs_dbg(VFS, "buffer length %d or smb length %d too large\n", |
3447 | buffer_length, smb_len); | |
be4cb9e3 PS |
3448 | return -EINVAL; |
3449 | } | |
3450 | ||
3451 | if ((begin_of_buf > end_of_smb) || (end_of_buf > end_of_smb)) { | |
a0a3036b | 3452 | cifs_dbg(VFS, "Invalid server response, bad offset to data\n"); |
be4cb9e3 PS |
3453 | return -EINVAL; |
3454 | } | |
3455 | ||
3456 | return 0; | |
3457 | } | |
3458 | ||
3459 | /* | |
3460 | * If SMB buffer fields are valid, copy into temporary buffer to hold result. | |
3461 | * Caller must free buffer. | |
3462 | */ | |
c5a5f38f RS |
3463 | int |
3464 | smb2_validate_and_copy_iov(unsigned int offset, unsigned int buffer_length, | |
3465 | struct kvec *iov, unsigned int minbufsize, | |
3466 | char *data) | |
be4cb9e3 | 3467 | { |
1fc6ad2f | 3468 | char *begin_of_buf = offset + (char *)iov->iov_base; |
be4cb9e3 PS |
3469 | int rc; |
3470 | ||
3471 | if (!data) | |
3472 | return -EINVAL; | |
3473 | ||
730928c8 | 3474 | rc = smb2_validate_iov(offset, buffer_length, iov, minbufsize); |
be4cb9e3 PS |
3475 | if (rc) |
3476 | return rc; | |
3477 | ||
3478 | memcpy(data, begin_of_buf, buffer_length); | |
3479 | ||
3480 | return 0; | |
3481 | } | |
3482 | ||
296ecbae | 3483 | int |
352d96f3 AA |
3484 | SMB2_query_info_init(struct cifs_tcon *tcon, struct TCP_Server_Info *server, |
3485 | struct smb_rqst *rqst, | |
296ecbae RS |
3486 | u64 persistent_fid, u64 volatile_fid, |
3487 | u8 info_class, u8 info_type, u32 additional_info, | |
f5b05d62 | 3488 | size_t output_len, size_t input_len, void *input) |
be4cb9e3 PS |
3489 | { |
3490 | struct smb2_query_info_req *req; | |
296ecbae | 3491 | struct kvec *iov = rqst->rq_iov; |
b2fb7fec | 3492 | unsigned int total_len; |
296ecbae | 3493 | int rc; |
be4cb9e3 | 3494 | |
352d96f3 AA |
3495 | rc = smb2_plain_req_init(SMB2_QUERY_INFO, tcon, server, |
3496 | (void **) &req, &total_len); | |
be4cb9e3 PS |
3497 | if (rc) |
3498 | return rc; | |
3499 | ||
42c493c1 | 3500 | req->InfoType = info_type; |
f0df737e | 3501 | req->FileInfoClass = info_class; |
be4cb9e3 PS |
3502 | req->PersistentFileId = persistent_fid; |
3503 | req->VolatileFileId = volatile_fid; | |
42c493c1 | 3504 | req->AdditionalInformation = cpu_to_le32(additional_info); |
48923d2a | 3505 | |
f0df737e | 3506 | req->OutputBufferLength = cpu_to_le32(output_len); |
f5b05d62 RS |
3507 | if (input_len) { |
3508 | req->InputBufferLength = cpu_to_le32(input_len); | |
3509 | /* total_len for smb query request never close to le16 max */ | |
3510 | req->InputBufferOffset = cpu_to_le16(total_len - 1); | |
3511 | memcpy(req->Buffer, input, input_len); | |
3512 | } | |
be4cb9e3 PS |
3513 | |
3514 | iov[0].iov_base = (char *)req; | |
b2fb7fec | 3515 | /* 1 for Buffer */ |
f5b05d62 | 3516 | iov[0].iov_len = total_len - 1 + input_len; |
296ecbae RS |
3517 | return 0; |
3518 | } | |
3519 | ||
3520 | void | |
3521 | SMB2_query_info_free(struct smb_rqst *rqst) | |
3522 | { | |
32a1fb36 RS |
3523 | if (rqst && rqst->rq_iov) |
3524 | cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */ | |
296ecbae RS |
3525 | } |
3526 | ||
3527 | static int | |
3528 | query_info(const unsigned int xid, struct cifs_tcon *tcon, | |
3529 | u64 persistent_fid, u64 volatile_fid, u8 info_class, u8 info_type, | |
3530 | u32 additional_info, size_t output_len, size_t min_len, void **data, | |
3531 | u32 *dlen) | |
3532 | { | |
3533 | struct smb_rqst rqst; | |
3534 | struct smb2_query_info_rsp *rsp = NULL; | |
3535 | struct kvec iov[1]; | |
3536 | struct kvec rsp_iov; | |
3537 | int rc = 0; | |
ef2298a0 | 3538 | int resp_buftype = CIFS_NO_BUFFER; |
296ecbae | 3539 | struct cifs_ses *ses = tcon->ses; |
ac6ad7a8 | 3540 | struct TCP_Server_Info *server; |
296ecbae | 3541 | int flags = 0; |
73aaf920 | 3542 | bool allocated = false; |
296ecbae RS |
3543 | |
3544 | cifs_dbg(FYI, "Query Info\n"); | |
3545 | ||
ac6ad7a8 CIK |
3546 | if (!ses) |
3547 | return -EIO; | |
352d96f3 | 3548 | server = cifs_pick_channel(ses); |
ac6ad7a8 | 3549 | if (!server) |
296ecbae RS |
3550 | return -EIO; |
3551 | ||
3552 | if (smb3_encryption_required(tcon)) | |
3553 | flags |= CIFS_TRANSFORM_REQ; | |
be4cb9e3 | 3554 | |
40eff45b | 3555 | memset(&rqst, 0, sizeof(struct smb_rqst)); |
296ecbae | 3556 | memset(&iov, 0, sizeof(iov)); |
40eff45b RS |
3557 | rqst.rq_iov = iov; |
3558 | rqst.rq_nvec = 1; | |
3559 | ||
352d96f3 AA |
3560 | rc = SMB2_query_info_init(tcon, server, |
3561 | &rqst, persistent_fid, volatile_fid, | |
296ecbae | 3562 | info_class, info_type, additional_info, |
f5b05d62 | 3563 | output_len, 0, NULL); |
296ecbae RS |
3564 | if (rc) |
3565 | goto qinf_exit; | |
3566 | ||
d42043a6 SF |
3567 | trace_smb3_query_info_enter(xid, persistent_fid, tcon->tid, |
3568 | ses->Suid, info_class, (__u32)info_type); | |
3569 | ||
352d96f3 AA |
3570 | rc = cifs_send_recv(xid, ses, server, |
3571 | &rqst, &resp_buftype, flags, &rsp_iov); | |
da502f7d | 3572 | rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; |
e5d04887 | 3573 | |
be4cb9e3 PS |
3574 | if (rc) { |
3575 | cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE); | |
eccb4422 SF |
3576 | trace_smb3_query_info_err(xid, persistent_fid, tcon->tid, |
3577 | ses->Suid, info_class, (__u32)info_type, rc); | |
be4cb9e3 PS |
3578 | goto qinf_exit; |
3579 | } | |
3580 | ||
d42043a6 SF |
3581 | trace_smb3_query_info_done(xid, persistent_fid, tcon->tid, |
3582 | ses->Suid, info_class, (__u32)info_type); | |
3583 | ||
42c493c1 SP |
3584 | if (dlen) { |
3585 | *dlen = le32_to_cpu(rsp->OutputBufferLength); | |
3586 | if (!*data) { | |
3587 | *data = kmalloc(*dlen, GFP_KERNEL); | |
3588 | if (!*data) { | |
3175eb9b | 3589 | cifs_tcon_dbg(VFS, |
42c493c1 SP |
3590 | "Error %d allocating memory for acl\n", |
3591 | rc); | |
3592 | *dlen = 0; | |
73aaf920 | 3593 | rc = -ENOMEM; |
42c493c1 SP |
3594 | goto qinf_exit; |
3595 | } | |
73aaf920 | 3596 | allocated = true; |
42c493c1 SP |
3597 | } |
3598 | } | |
3599 | ||
c5a5f38f RS |
3600 | rc = smb2_validate_and_copy_iov(le16_to_cpu(rsp->OutputBufferOffset), |
3601 | le32_to_cpu(rsp->OutputBufferLength), | |
3602 | &rsp_iov, min_len, *data); | |
73aaf920 CIK |
3603 | if (rc && allocated) { |
3604 | kfree(*data); | |
3605 | *data = NULL; | |
3606 | *dlen = 0; | |
3607 | } | |
be4cb9e3 PS |
3608 | |
3609 | qinf_exit: | |
296ecbae | 3610 | SMB2_query_info_free(&rqst); |
be4cb9e3 PS |
3611 | free_rsp_buf(resp_buftype, rsp); |
3612 | return rc; | |
3613 | } | |
9094fad1 | 3614 | |
42c493c1 SP |
3615 | int SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon, |
3616 | u64 persistent_fid, u64 volatile_fid, struct smb2_file_all_info *data) | |
3617 | { | |
3618 | return query_info(xid, tcon, persistent_fid, volatile_fid, | |
3619 | FILE_ALL_INFORMATION, SMB2_O_INFO_FILE, 0, | |
3620 | sizeof(struct smb2_file_all_info) + PATH_MAX * 2, | |
3621 | sizeof(struct smb2_file_all_info), (void **)&data, | |
3622 | NULL); | |
3623 | } | |
3624 | ||
e0ae8a9a SF |
3625 | #if 0 |
3626 | /* currently unused, as now we are doing compounding instead (see smb311_posix_query_path_info) */ | |
b1bc1874 SF |
3627 | int |
3628 | SMB311_posix_query_info(const unsigned int xid, struct cifs_tcon *tcon, | |
3629 | u64 persistent_fid, u64 volatile_fid, struct smb311_posix_qinfo *data, u32 *plen) | |
3630 | { | |
3631 | size_t output_len = sizeof(struct smb311_posix_qinfo *) + | |
3632 | (sizeof(struct cifs_sid) * 2) + (PATH_MAX * 2); | |
3633 | *plen = 0; | |
3634 | ||
3635 | return query_info(xid, tcon, persistent_fid, volatile_fid, | |
3636 | SMB_FIND_FILE_POSIX_INFO, SMB2_O_INFO_FILE, 0, | |
3637 | output_len, sizeof(struct smb311_posix_qinfo), (void **)&data, plen); | |
e0ae8a9a | 3638 | /* Note caller must free "data" (passed in above). It may be allocated in query_info call */ |
b1bc1874 | 3639 | } |
e0ae8a9a | 3640 | #endif |
b1bc1874 | 3641 | |
f0df737e | 3642 | int |
42c493c1 | 3643 | SMB2_query_acl(const unsigned int xid, struct cifs_tcon *tcon, |
3970acf7 | 3644 | u64 persistent_fid, u64 volatile_fid, |
9541b813 | 3645 | void **data, u32 *plen, u32 extra_info) |
f0df737e | 3646 | { |
9541b813 BP |
3647 | __u32 additional_info = OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO | |
3648 | extra_info; | |
42c493c1 SP |
3649 | *plen = 0; |
3650 | ||
f0df737e | 3651 | return query_info(xid, tcon, persistent_fid, volatile_fid, |
42c493c1 | 3652 | 0, SMB2_O_INFO_SECURITY, additional_info, |
ee25c6dd | 3653 | SMB2_MAX_BUFFER_SIZE, MIN_SEC_DESC_LEN, data, plen); |
f0df737e PS |
3654 | } |
3655 | ||
3656 | int | |
3657 | SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon, | |
3658 | u64 persistent_fid, u64 volatile_fid, __le64 *uniqueid) | |
3659 | { | |
3660 | return query_info(xid, tcon, persistent_fid, volatile_fid, | |
42c493c1 SP |
3661 | FILE_INTERNAL_INFORMATION, SMB2_O_INFO_FILE, 0, |
3662 | sizeof(struct smb2_file_internal_info), | |
f0df737e | 3663 | sizeof(struct smb2_file_internal_info), |
42c493c1 | 3664 | (void **)&uniqueid, NULL); |
f0df737e PS |
3665 | } |
3666 | ||
c3498185 SF |
3667 | /* |
3668 | * CHANGE_NOTIFY Request is sent to get notifications on changes to a directory | |
3669 | * See MS-SMB2 2.2.35 and 2.2.36 | |
3670 | */ | |
3671 | ||
388962e8 | 3672 | static int |
c3498185 | 3673 | SMB2_notify_init(const unsigned int xid, struct smb_rqst *rqst, |
352d96f3 AA |
3674 | struct cifs_tcon *tcon, struct TCP_Server_Info *server, |
3675 | u64 persistent_fid, u64 volatile_fid, | |
3676 | u32 completion_filter, bool watch_tree) | |
c3498185 SF |
3677 | { |
3678 | struct smb2_change_notify_req *req; | |
3679 | struct kvec *iov = rqst->rq_iov; | |
3680 | unsigned int total_len; | |
3681 | int rc; | |
3682 | ||
352d96f3 AA |
3683 | rc = smb2_plain_req_init(SMB2_CHANGE_NOTIFY, tcon, server, |
3684 | (void **) &req, &total_len); | |
c3498185 SF |
3685 | if (rc) |
3686 | return rc; | |
3687 | ||
351a59da PA |
3688 | req->PersistentFileId = persistent_fid; |
3689 | req->VolatileFileId = volatile_fid; | |
d26c2ddd | 3690 | /* See note 354 of MS-SMB2, 64K max */ |
52870d50 SF |
3691 | req->OutputBufferLength = |
3692 | cpu_to_le32(SMB2_MAX_BUFFER_SIZE - MAX_SMB2_HDR_SIZE); | |
c3498185 SF |
3693 | req->CompletionFilter = cpu_to_le32(completion_filter); |
3694 | if (watch_tree) | |
3695 | req->Flags = cpu_to_le16(SMB2_WATCH_TREE); | |
3696 | else | |
3697 | req->Flags = 0; | |
3698 | ||
3699 | iov[0].iov_base = (char *)req; | |
3700 | iov[0].iov_len = total_len; | |
3701 | ||
3702 | return 0; | |
3703 | } | |
3704 | ||
3705 | int | |
3706 | SMB2_change_notify(const unsigned int xid, struct cifs_tcon *tcon, | |
3707 | u64 persistent_fid, u64 volatile_fid, bool watch_tree, | |
3708 | u32 completion_filter) | |
3709 | { | |
3710 | struct cifs_ses *ses = tcon->ses; | |
352d96f3 | 3711 | struct TCP_Server_Info *server = cifs_pick_channel(ses); |
c3498185 SF |
3712 | struct smb_rqst rqst; |
3713 | struct kvec iov[1]; | |
3714 | struct kvec rsp_iov = {NULL, 0}; | |
3715 | int resp_buftype = CIFS_NO_BUFFER; | |
3716 | int flags = 0; | |
3717 | int rc = 0; | |
3718 | ||
3719 | cifs_dbg(FYI, "change notify\n"); | |
352d96f3 | 3720 | if (!ses || !server) |
c3498185 SF |
3721 | return -EIO; |
3722 | ||
3723 | if (smb3_encryption_required(tcon)) | |
3724 | flags |= CIFS_TRANSFORM_REQ; | |
3725 | ||
3726 | memset(&rqst, 0, sizeof(struct smb_rqst)); | |
3727 | memset(&iov, 0, sizeof(iov)); | |
3728 | rqst.rq_iov = iov; | |
3729 | rqst.rq_nvec = 1; | |
3730 | ||
352d96f3 AA |
3731 | rc = SMB2_notify_init(xid, &rqst, tcon, server, |
3732 | persistent_fid, volatile_fid, | |
c3498185 SF |
3733 | completion_filter, watch_tree); |
3734 | if (rc) | |
3735 | goto cnotify_exit; | |
3736 | ||
3737 | trace_smb3_notify_enter(xid, persistent_fid, tcon->tid, ses->Suid, | |
3738 | (u8)watch_tree, completion_filter); | |
352d96f3 AA |
3739 | rc = cifs_send_recv(xid, ses, server, |
3740 | &rqst, &resp_buftype, flags, &rsp_iov); | |
c3498185 SF |
3741 | |
3742 | if (rc != 0) { | |
3743 | cifs_stats_fail_inc(tcon, SMB2_CHANGE_NOTIFY_HE); | |
3744 | trace_smb3_notify_err(xid, persistent_fid, tcon->tid, ses->Suid, | |
3745 | (u8)watch_tree, completion_filter, rc); | |
3746 | } else | |
3747 | trace_smb3_notify_done(xid, persistent_fid, tcon->tid, | |
3748 | ses->Suid, (u8)watch_tree, completion_filter); | |
3749 | ||
3750 | cnotify_exit: | |
3751 | if (rqst.rq_iov) | |
3752 | cifs_small_buf_release(rqst.rq_iov[0].iov_base); /* request */ | |
3753 | free_rsp_buf(resp_buftype, rsp_iov.iov_base); | |
3754 | return rc; | |
3755 | } | |
3756 | ||
3757 | ||
3758 | ||
9094fad1 PS |
3759 | /* |
3760 | * This is a no-op for now. We're not really interested in the reply, but | |
3761 | * rather in the fact that the server sent one and that server->lstrp | |
3762 | * gets updated. | |
3763 | * | |
3764 | * FIXME: maybe we should consider checking that the reply matches request? | |
3765 | */ | |
3766 | static void | |
3767 | smb2_echo_callback(struct mid_q_entry *mid) | |
3768 | { | |
3769 | struct TCP_Server_Info *server = mid->callback_data; | |
31473fc4 | 3770 | struct smb2_echo_rsp *rsp = (struct smb2_echo_rsp *)mid->resp_buf; |
34f4deb7 | 3771 | struct cifs_credits credits = { .value = 0, .instance = 0 }; |
9094fad1 | 3772 | |
0fd1d37b | 3773 | if (mid->mid_state == MID_RESPONSE_RECEIVED |
34f4deb7 | 3774 | || mid->mid_state == MID_RESPONSE_MALFORMED) { |
0d35e382 | 3775 | credits.value = le16_to_cpu(rsp->hdr.CreditRequest); |
34f4deb7 PS |
3776 | credits.instance = server->reconnect_instance; |
3777 | } | |
9094fad1 PS |
3778 | |
3779 | DeleteMidQEntry(mid); | |
34f4deb7 | 3780 | add_credits(server, &credits, CIFS_ECHO_OP); |
9094fad1 PS |
3781 | } |
3782 | ||
53e0e11e PS |
3783 | void smb2_reconnect_server(struct work_struct *work) |
3784 | { | |
3785 | struct TCP_Server_Info *server = container_of(work, | |
3786 | struct TCP_Server_Info, reconnect.work); | |
3663c904 SP |
3787 | struct TCP_Server_Info *pserver; |
3788 | struct cifs_ses *ses, *ses2; | |
53e0e11e | 3789 | struct cifs_tcon *tcon, *tcon2; |
3663c904 SP |
3790 | struct list_head tmp_list, tmp_ses_list; |
3791 | bool tcon_exist = false, ses_exist = false; | |
8a409cda | 3792 | bool tcon_selected = false; |
18ea4311 | 3793 | int rc; |
3663c904 | 3794 | bool resched = false; |
18ea4311 | 3795 | |
3663c904 SP |
3796 | /* If server is a channel, select the primary channel */ |
3797 | pserver = CIFS_SERVER_IS_CHAN(server) ? server->primary_server : server; | |
53e0e11e PS |
3798 | |
3799 | /* Prevent simultaneous reconnects that can corrupt tcon->rlist list */ | |
3663c904 | 3800 | mutex_lock(&pserver->reconnect_mutex); |
53e0e11e PS |
3801 | |
3802 | INIT_LIST_HEAD(&tmp_list); | |
3663c904 SP |
3803 | INIT_LIST_HEAD(&tmp_ses_list); |
3804 | cifs_dbg(FYI, "Reconnecting tcons and channels\n"); | |
53e0e11e PS |
3805 | |
3806 | spin_lock(&cifs_tcp_ses_lock); | |
3663c904 SP |
3807 | list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) { |
3808 | ||
8a409cda | 3809 | tcon_selected = false; |
3663c904 | 3810 | |
53e0e11e | 3811 | list_for_each_entry(tcon, &ses->tcon_list, tcon_list) { |
96a988ff | 3812 | if (tcon->need_reconnect || tcon->need_reopen_files) { |
53e0e11e PS |
3813 | tcon->tc_count++; |
3814 | list_add_tail(&tcon->rlist, &tmp_list); | |
3663c904 | 3815 | tcon_selected = tcon_exist = true; |
53e0e11e PS |
3816 | } |
3817 | } | |
0ff2b018 RS |
3818 | /* |
3819 | * IPC has the same lifetime as its session and uses its | |
3820 | * refcount. | |
3821 | */ | |
b327a717 AA |
3822 | if (ses->tcon_ipc && ses->tcon_ipc->need_reconnect) { |
3823 | list_add_tail(&ses->tcon_ipc->rlist, &tmp_list); | |
3663c904 SP |
3824 | tcon_selected = tcon_exist = true; |
3825 | ses->ses_count++; | |
3826 | } | |
3827 | /* | |
3828 | * handle the case where channel needs to reconnect | |
3829 | * binding session, but tcon is healthy (some other channel | |
3830 | * is active) | |
3831 | */ | |
88b024f5 | 3832 | spin_lock(&ses->chan_lock); |
3663c904 SP |
3833 | if (!tcon_selected && cifs_chan_needs_reconnect(ses, server)) { |
3834 | list_add_tail(&ses->rlist, &tmp_ses_list); | |
8a409cda | 3835 | ses_exist = true; |
0ff2b018 | 3836 | ses->ses_count++; |
b327a717 | 3837 | } |
88b024f5 | 3838 | spin_unlock(&ses->chan_lock); |
53e0e11e PS |
3839 | } |
3840 | /* | |
3841 | * Get the reference to server struct to be sure that the last call of | |
3842 | * cifs_put_tcon() in the loop below won't release the server pointer. | |
3843 | */ | |
3663c904 | 3844 | if (tcon_exist || ses_exist) |
53e0e11e PS |
3845 | server->srv_count++; |
3846 | ||
3847 | spin_unlock(&cifs_tcp_ses_lock); | |
3848 | ||
3849 | list_for_each_entry_safe(tcon, tcon2, &tmp_list, rlist) { | |
352d96f3 | 3850 | rc = smb2_reconnect(SMB2_INTERNAL_CMD, tcon, server); |
18ea4311 | 3851 | if (!rc) |
96a988ff | 3852 | cifs_reopen_persistent_handles(tcon); |
18ea4311 GP |
3853 | else |
3854 | resched = true; | |
53e0e11e | 3855 | list_del_init(&tcon->rlist); |
0ff2b018 RS |
3856 | if (tcon->ipc) |
3857 | cifs_put_smb_ses(tcon->ses); | |
3858 | else | |
3859 | cifs_put_tcon(tcon); | |
53e0e11e PS |
3860 | } |
3861 | ||
3663c904 SP |
3862 | if (!ses_exist) |
3863 | goto done; | |
3864 | ||
3865 | /* allocate a dummy tcon struct used for reconnect */ | |
3866 | tcon = kzalloc(sizeof(struct cifs_tcon), GFP_KERNEL); | |
3867 | if (!tcon) { | |
3868 | resched = true; | |
a96c9448 XT |
3869 | list_for_each_entry_safe(ses, ses2, &tmp_ses_list, rlist) { |
3870 | list_del_init(&ses->rlist); | |
3871 | cifs_put_smb_ses(ses); | |
3872 | } | |
3663c904 SP |
3873 | goto done; |
3874 | } | |
3875 | ||
fdf59eb5 | 3876 | tcon->status = TID_GOOD; |
3663c904 SP |
3877 | tcon->retry = false; |
3878 | tcon->need_reconnect = false; | |
3879 | ||
3880 | /* now reconnect sessions for necessary channels */ | |
3881 | list_for_each_entry_safe(ses, ses2, &tmp_ses_list, rlist) { | |
3882 | tcon->ses = ses; | |
3883 | rc = smb2_reconnect(SMB2_INTERNAL_CMD, tcon, server); | |
3884 | if (rc) | |
3885 | resched = true; | |
3886 | list_del_init(&ses->rlist); | |
3887 | cifs_put_smb_ses(ses); | |
3888 | } | |
3889 | kfree(tcon); | |
3890 | ||
3891 | done: | |
3892 | cifs_dbg(FYI, "Reconnecting tcons and channels finished\n"); | |
18ea4311 GP |
3893 | if (resched) |
3894 | queue_delayed_work(cifsiod_wq, &server->reconnect, 2 * HZ); | |
3663c904 | 3895 | mutex_unlock(&pserver->reconnect_mutex); |
53e0e11e PS |
3896 | |
3897 | /* now we can safely release srv struct */ | |
3663c904 | 3898 | if (tcon_exist || ses_exist) |
53e0e11e PS |
3899 | cifs_put_tcp_session(server, 1); |
3900 | } | |
3901 | ||
9094fad1 PS |
3902 | int |
3903 | SMB2_echo(struct TCP_Server_Info *server) | |
3904 | { | |
3905 | struct smb2_echo_req *req; | |
3906 | int rc = 0; | |
c713c877 | 3907 | struct kvec iov[1]; |
738f9de5 | 3908 | struct smb_rqst rqst = { .rq_iov = iov, |
c713c877 | 3909 | .rq_nvec = 1 }; |
7f7ae759 | 3910 | unsigned int total_len; |
9094fad1 | 3911 | |
bda487ac | 3912 | cifs_dbg(FYI, "In echo request for conn_id %lld\n", server->conn_id); |
9094fad1 | 3913 | |
d7d7a66a | 3914 | spin_lock(&server->srv_lock); |
1a6a41d4 SP |
3915 | if (server->ops->need_neg && |
3916 | server->ops->need_neg(server)) { | |
d7d7a66a | 3917 | spin_unlock(&server->srv_lock); |
53e0e11e | 3918 | /* No need to send echo on newly established connections */ |
b08484d7 | 3919 | mod_delayed_work(cifsiod_wq, &server->reconnect, 0); |
53e0e11e | 3920 | return rc; |
4fcd1813 | 3921 | } |
d7d7a66a | 3922 | spin_unlock(&server->srv_lock); |
4fcd1813 | 3923 | |
352d96f3 AA |
3924 | rc = smb2_plain_req_init(SMB2_ECHO, NULL, server, |
3925 | (void **)&req, &total_len); | |
9094fad1 PS |
3926 | if (rc) |
3927 | return rc; | |
3928 | ||
0d35e382 | 3929 | req->hdr.CreditRequest = cpu_to_le16(1); |
9094fad1 | 3930 | |
c713c877 RS |
3931 | iov[0].iov_len = total_len; |
3932 | iov[0].iov_base = (char *)req; | |
9094fad1 | 3933 | |
9b7c18a2 | 3934 | rc = cifs_call_async(server, &rqst, NULL, smb2_echo_callback, NULL, |
3349c3a7 | 3935 | server, CIFS_ECHO_OP, NULL); |
9094fad1 | 3936 | if (rc) |
f96637be | 3937 | cifs_dbg(FYI, "Echo request failed: %d\n", rc); |
9094fad1 PS |
3938 | |
3939 | cifs_small_buf_release(req); | |
3940 | return rc; | |
3941 | } | |
7a5cfb19 | 3942 | |
86e14e12 RS |
3943 | void |
3944 | SMB2_flush_free(struct smb_rqst *rqst) | |
3945 | { | |
3946 | if (rqst && rqst->rq_iov) | |
3947 | cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */ | |
3948 | } | |
3949 | ||
7a5cfb19 | 3950 | int |
86e14e12 | 3951 | SMB2_flush_init(const unsigned int xid, struct smb_rqst *rqst, |
352d96f3 AA |
3952 | struct cifs_tcon *tcon, struct TCP_Server_Info *server, |
3953 | u64 persistent_fid, u64 volatile_fid) | |
7a5cfb19 PS |
3954 | { |
3955 | struct smb2_flush_req *req; | |
86e14e12 | 3956 | struct kvec *iov = rqst->rq_iov; |
1f444e4c | 3957 | unsigned int total_len; |
86e14e12 | 3958 | int rc; |
7a5cfb19 | 3959 | |
352d96f3 AA |
3960 | rc = smb2_plain_req_init(SMB2_FLUSH, tcon, server, |
3961 | (void **) &req, &total_len); | |
7a5cfb19 PS |
3962 | if (rc) |
3963 | return rc; | |
3964 | ||
351a59da PA |
3965 | req->PersistentFileId = persistent_fid; |
3966 | req->VolatileFileId = volatile_fid; | |
7a5cfb19 PS |
3967 | |
3968 | iov[0].iov_base = (char *)req; | |
1f444e4c | 3969 | iov[0].iov_len = total_len; |
7a5cfb19 | 3970 | |
86e14e12 RS |
3971 | return 0; |
3972 | } | |
3973 | ||
3974 | int | |
3975 | SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, | |
3976 | u64 volatile_fid) | |
3977 | { | |
3978 | struct cifs_ses *ses = tcon->ses; | |
3979 | struct smb_rqst rqst; | |
3980 | struct kvec iov[1]; | |
3981 | struct kvec rsp_iov = {NULL, 0}; | |
352d96f3 | 3982 | struct TCP_Server_Info *server = cifs_pick_channel(ses); |
86e14e12 RS |
3983 | int resp_buftype = CIFS_NO_BUFFER; |
3984 | int flags = 0; | |
3985 | int rc = 0; | |
3986 | ||
3987 | cifs_dbg(FYI, "flush\n"); | |
3988 | if (!ses || !(ses->server)) | |
3989 | return -EIO; | |
3990 | ||
3991 | if (smb3_encryption_required(tcon)) | |
3992 | flags |= CIFS_TRANSFORM_REQ; | |
3993 | ||
40eff45b | 3994 | memset(&rqst, 0, sizeof(struct smb_rqst)); |
86e14e12 | 3995 | memset(&iov, 0, sizeof(iov)); |
40eff45b RS |
3996 | rqst.rq_iov = iov; |
3997 | rqst.rq_nvec = 1; | |
3998 | ||
352d96f3 AA |
3999 | rc = SMB2_flush_init(xid, &rqst, tcon, server, |
4000 | persistent_fid, volatile_fid); | |
86e14e12 RS |
4001 | if (rc) |
4002 | goto flush_exit; | |
4003 | ||
f90f9797 | 4004 | trace_smb3_flush_enter(xid, persistent_fid, tcon->tid, ses->Suid); |
352d96f3 AA |
4005 | rc = cifs_send_recv(xid, ses, server, |
4006 | &rqst, &resp_buftype, flags, &rsp_iov); | |
7a5cfb19 | 4007 | |
eccb4422 | 4008 | if (rc != 0) { |
7a5cfb19 | 4009 | cifs_stats_fail_inc(tcon, SMB2_FLUSH_HE); |
eccb4422 SF |
4010 | trace_smb3_flush_err(xid, persistent_fid, tcon->tid, ses->Suid, |
4011 | rc); | |
f90f9797 SF |
4012 | } else |
4013 | trace_smb3_flush_done(xid, persistent_fid, tcon->tid, | |
4014 | ses->Suid); | |
7a5cfb19 | 4015 | |
86e14e12 RS |
4016 | flush_exit: |
4017 | SMB2_flush_free(&rqst); | |
da502f7d | 4018 | free_rsp_buf(resp_buftype, rsp_iov.iov_base); |
7a5cfb19 PS |
4019 | return rc; |
4020 | } | |
09a4707e PS |
4021 | |
4022 | /* | |
4023 | * To form a chain of read requests, any read requests after the first should | |
4024 | * have the end_of_chain boolean set to true. | |
4025 | */ | |
4026 | static int | |
738f9de5 | 4027 | smb2_new_read_req(void **buf, unsigned int *total_len, |
2dabfd5b LL |
4028 | struct cifs_io_parms *io_parms, struct cifs_readdata *rdata, |
4029 | unsigned int remaining_bytes, int request_type) | |
09a4707e PS |
4030 | { |
4031 | int rc = -EACCES; | |
d8d9de53 | 4032 | struct smb2_read_req *req = NULL; |
0d35e382 | 4033 | struct smb2_hdr *shdr; |
352d96f3 | 4034 | struct TCP_Server_Info *server = io_parms->server; |
09a4707e | 4035 | |
352d96f3 AA |
4036 | rc = smb2_plain_req_init(SMB2_READ, io_parms->tcon, server, |
4037 | (void **) &req, total_len); | |
09a4707e PS |
4038 | if (rc) |
4039 | return rc; | |
2dabfd5b | 4040 | |
2dabfd5b | 4041 | if (server == NULL) |
09a4707e PS |
4042 | return -ECONNABORTED; |
4043 | ||
0d35e382 RS |
4044 | shdr = &req->hdr; |
4045 | shdr->Id.SyncId.ProcessId = cpu_to_le32(io_parms->pid); | |
09a4707e | 4046 | |
351a59da PA |
4047 | req->PersistentFileId = io_parms->persistent_fid; |
4048 | req->VolatileFileId = io_parms->volatile_fid; | |
09a4707e PS |
4049 | req->ReadChannelInfoOffset = 0; /* reserved */ |
4050 | req->ReadChannelInfoLength = 0; /* reserved */ | |
4051 | req->Channel = 0; /* reserved */ | |
4052 | req->MinimumCount = 0; | |
4053 | req->Length = cpu_to_le32(io_parms->length); | |
4054 | req->Offset = cpu_to_le64(io_parms->offset); | |
d323c246 SF |
4055 | |
4056 | trace_smb3_read_enter(0 /* xid */, | |
4057 | io_parms->persistent_fid, | |
4058 | io_parms->tcon->tid, io_parms->tcon->ses->Suid, | |
4059 | io_parms->offset, io_parms->length); | |
bd3dcc6a LL |
4060 | #ifdef CONFIG_CIFS_SMB_DIRECT |
4061 | /* | |
4062 | * If we want to do a RDMA write, fill in and append | |
4063 | * smbd_buffer_descriptor_v1 to the end of read request | |
4064 | */ | |
bb4c0419 | 4065 | if (server->rdma && rdata && !server->sign && |
bd3dcc6a LL |
4066 | rdata->bytes >= server->smbd_conn->rdma_readwrite_threshold) { |
4067 | ||
4068 | struct smbd_buffer_descriptor_v1 *v1; | |
352d96f3 | 4069 | bool need_invalidate = server->dialect == SMB30_PROT_ID; |
bd3dcc6a LL |
4070 | |
4071 | rdata->mr = smbd_register_mr( | |
4072 | server->smbd_conn, rdata->pages, | |
7cf20bce LL |
4073 | rdata->nr_pages, rdata->page_offset, |
4074 | rdata->tailsz, true, need_invalidate); | |
bd3dcc6a | 4075 | if (!rdata->mr) |
b7972092 | 4076 | return -EAGAIN; |
bd3dcc6a LL |
4077 | |
4078 | req->Channel = SMB2_CHANNEL_RDMA_V1_INVALIDATE; | |
4079 | if (need_invalidate) | |
4080 | req->Channel = SMB2_CHANNEL_RDMA_V1; | |
4081 | req->ReadChannelInfoOffset = | |
d8d9de53 | 4082 | cpu_to_le16(offsetof(struct smb2_read_req, Buffer)); |
bd3dcc6a | 4083 | req->ReadChannelInfoLength = |
2026b06e | 4084 | cpu_to_le16(sizeof(struct smbd_buffer_descriptor_v1)); |
bd3dcc6a | 4085 | v1 = (struct smbd_buffer_descriptor_v1 *) &req->Buffer[0]; |
2026b06e SF |
4086 | v1->offset = cpu_to_le64(rdata->mr->mr->iova); |
4087 | v1->token = cpu_to_le32(rdata->mr->mr->rkey); | |
4088 | v1->length = cpu_to_le32(rdata->mr->mr->length); | |
bd3dcc6a LL |
4089 | |
4090 | *total_len += sizeof(*v1) - 1; | |
4091 | } | |
4092 | #endif | |
09a4707e PS |
4093 | if (request_type & CHAINED_REQUEST) { |
4094 | if (!(request_type & END_OF_CHAIN)) { | |
b8f57ee8 PS |
4095 | /* next 8-byte aligned request */ |
4096 | *total_len = DIV_ROUND_UP(*total_len, 8) * 8; | |
4097 | shdr->NextCommand = cpu_to_le32(*total_len); | |
09a4707e | 4098 | } else /* END_OF_CHAIN */ |
31473fc4 | 4099 | shdr->NextCommand = 0; |
09a4707e | 4100 | if (request_type & RELATED_REQUEST) { |
31473fc4 | 4101 | shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS; |
09a4707e PS |
4102 | /* |
4103 | * Related requests use info from previous read request | |
4104 | * in chain. | |
4105 | */ | |
0d35e382 RS |
4106 | shdr->SessionId = cpu_to_le64(0xFFFFFFFFFFFFFFFF); |
4107 | shdr->Id.SyncId.TreeId = cpu_to_le32(0xFFFFFFFF); | |
351a59da PA |
4108 | req->PersistentFileId = (u64)-1; |
4109 | req->VolatileFileId = (u64)-1; | |
09a4707e PS |
4110 | } |
4111 | } | |
4112 | if (remaining_bytes > io_parms->length) | |
4113 | req->RemainingBytes = cpu_to_le32(remaining_bytes); | |
4114 | else | |
4115 | req->RemainingBytes = 0; | |
4116 | ||
738f9de5 | 4117 | *buf = req; |
09a4707e PS |
4118 | return rc; |
4119 | } | |
4120 | ||
4121 | static void | |
4122 | smb2_readv_callback(struct mid_q_entry *mid) | |
4123 | { | |
4124 | struct cifs_readdata *rdata = mid->callback_data; | |
4125 | struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink); | |
352d96f3 | 4126 | struct TCP_Server_Info *server = rdata->server; |
0d35e382 RS |
4127 | struct smb2_hdr *shdr = |
4128 | (struct smb2_hdr *)rdata->iov[0].iov_base; | |
34f4deb7 | 4129 | struct cifs_credits credits = { .value = 0, .instance = 0 }; |
46f17d17 SF |
4130 | struct smb_rqst rqst = { .rq_iov = &rdata->iov[1], |
4131 | .rq_nvec = 1, | |
8321fec4 | 4132 | .rq_pages = rdata->pages, |
1dbe3466 | 4133 | .rq_offset = rdata->page_offset, |
8321fec4 JL |
4134 | .rq_npages = rdata->nr_pages, |
4135 | .rq_pagesz = rdata->pagesz, | |
4136 | .rq_tailsz = rdata->tailsz }; | |
09a4707e | 4137 | |
352d96f3 AA |
4138 | WARN_ONCE(rdata->server != mid->server, |
4139 | "rdata server %p != mid server %p", | |
4140 | rdata->server, mid->server); | |
4141 | ||
f96637be JP |
4142 | cifs_dbg(FYI, "%s: mid=%llu state=%d result=%d bytes=%u\n", |
4143 | __func__, mid->mid, mid->mid_state, rdata->result, | |
4144 | rdata->bytes); | |
09a4707e PS |
4145 | |
4146 | switch (mid->mid_state) { | |
4147 | case MID_RESPONSE_RECEIVED: | |
34f4deb7 PS |
4148 | credits.value = le16_to_cpu(shdr->CreditRequest); |
4149 | credits.instance = server->reconnect_instance; | |
09a4707e | 4150 | /* result already set, check signature */ |
4326ed2f | 4151 | if (server->sign && !mid->decrypted) { |
3c1bf7e4 PS |
4152 | int rc; |
4153 | ||
0b688cfc | 4154 | rc = smb2_verify_signature(&rqst, server); |
3c1bf7e4 | 4155 | if (rc) |
3175eb9b | 4156 | cifs_tcon_dbg(VFS, "SMB signature verification returned error = %d\n", |
f96637be | 4157 | rc); |
3c1bf7e4 | 4158 | } |
09a4707e | 4159 | /* FIXME: should this be counted toward the initiating task? */ |
34a54d61 PS |
4160 | task_io_account_read(rdata->got_bytes); |
4161 | cifs_stats_bytes_read(tcon, rdata->got_bytes); | |
09a4707e PS |
4162 | break; |
4163 | case MID_REQUEST_SUBMITTED: | |
4164 | case MID_RETRY_NEEDED: | |
4165 | rdata->result = -EAGAIN; | |
d913ed17 PS |
4166 | if (server->sign && rdata->got_bytes) |
4167 | /* reset bytes number since we can not check a sign */ | |
4168 | rdata->got_bytes = 0; | |
4169 | /* FIXME: should this be counted toward the initiating task? */ | |
4170 | task_io_account_read(rdata->got_bytes); | |
4171 | cifs_stats_bytes_read(tcon, rdata->got_bytes); | |
09a4707e | 4172 | break; |
0fd1d37b | 4173 | case MID_RESPONSE_MALFORMED: |
34f4deb7 PS |
4174 | credits.value = le16_to_cpu(shdr->CreditRequest); |
4175 | credits.instance = server->reconnect_instance; | |
30b5ae21 | 4176 | fallthrough; |
09a4707e | 4177 | default: |
6b15eb18 | 4178 | rdata->result = -EIO; |
09a4707e | 4179 | } |
bd3dcc6a LL |
4180 | #ifdef CONFIG_CIFS_SMB_DIRECT |
4181 | /* | |
4182 | * If this rdata has a memmory registered, the MR can be freed | |
4183 | * MR needs to be freed as soon as I/O finishes to prevent deadlock | |
4184 | * because they have limited number and are used for future I/Os | |
4185 | */ | |
4186 | if (rdata->mr) { | |
4187 | smbd_deregister_mr(rdata->mr); | |
4188 | rdata->mr = NULL; | |
4189 | } | |
4190 | #endif | |
082aaa87 | 4191 | if (rdata->result && rdata->result != -ENODATA) { |
09a4707e | 4192 | cifs_stats_fail_inc(tcon, SMB2_READ_HE); |
7d42e72f PS |
4193 | trace_smb3_read_err(0 /* xid */, |
4194 | rdata->cfile->fid.persistent_fid, | |
4195 | tcon->tid, tcon->ses->Suid, rdata->offset, | |
4196 | rdata->bytes, rdata->result); | |
4197 | } else | |
4198 | trace_smb3_read_done(0 /* xid */, | |
4199 | rdata->cfile->fid.persistent_fid, | |
4200 | tcon->tid, tcon->ses->Suid, | |
4201 | rdata->offset, rdata->got_bytes); | |
09a4707e PS |
4202 | |
4203 | queue_work(cifsiod_wq, &rdata->work); | |
4204 | DeleteMidQEntry(mid); | |
34f4deb7 | 4205 | add_credits(server, &credits, 0); |
09a4707e PS |
4206 | } |
4207 | ||
738f9de5 | 4208 | /* smb2_async_readv - send an async read, and set up mid to handle result */ |
09a4707e PS |
4209 | int |
4210 | smb2_async_readv(struct cifs_readdata *rdata) | |
4211 | { | |
bed9da02 | 4212 | int rc, flags = 0; |
31473fc4 | 4213 | char *buf; |
0d35e382 | 4214 | struct smb2_hdr *shdr; |
09a4707e | 4215 | struct cifs_io_parms io_parms; |
738f9de5 | 4216 | struct smb_rqst rqst = { .rq_iov = rdata->iov, |
c713c877 | 4217 | .rq_nvec = 1 }; |
bed9da02 | 4218 | struct TCP_Server_Info *server; |
352d96f3 | 4219 | struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink); |
738f9de5 | 4220 | unsigned int total_len; |
09a4707e | 4221 | |
f96637be JP |
4222 | cifs_dbg(FYI, "%s: offset=%llu bytes=%u\n", |
4223 | __func__, rdata->offset, rdata->bytes); | |
09a4707e | 4224 | |
352d96f3 AA |
4225 | if (!rdata->server) |
4226 | rdata->server = cifs_pick_channel(tcon->ses); | |
4227 | ||
09a4707e | 4228 | io_parms.tcon = tlink_tcon(rdata->cfile->tlink); |
352d96f3 | 4229 | io_parms.server = server = rdata->server; |
09a4707e PS |
4230 | io_parms.offset = rdata->offset; |
4231 | io_parms.length = rdata->bytes; | |
4232 | io_parms.persistent_fid = rdata->cfile->fid.persistent_fid; | |
4233 | io_parms.volatile_fid = rdata->cfile->fid.volatile_fid; | |
4234 | io_parms.pid = rdata->pid; | |
bed9da02 | 4235 | |
2dabfd5b LL |
4236 | rc = smb2_new_read_req( |
4237 | (void **) &buf, &total_len, &io_parms, rdata, 0, 0); | |
f0b93cb9 | 4238 | if (rc) |
09a4707e PS |
4239 | return rc; |
4240 | ||
5a77e75f | 4241 | if (smb3_encryption_required(io_parms.tcon)) |
7fb8986e PS |
4242 | flags |= CIFS_TRANSFORM_REQ; |
4243 | ||
c713c877 RS |
4244 | rdata->iov[0].iov_base = buf; |
4245 | rdata->iov[0].iov_len = total_len; | |
b8f57ee8 | 4246 | |
0d35e382 | 4247 | shdr = (struct smb2_hdr *)buf; |
09a4707e | 4248 | |
335b7b62 | 4249 | if (rdata->credits.value > 0) { |
31473fc4 | 4250 | shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(rdata->bytes, |
bed9da02 | 4251 | SMB2_MAX_BUFFER_SIZE)); |
88fd98a2 | 4252 | shdr->CreditRequest = cpu_to_le16(le16_to_cpu(shdr->CreditCharge) + 8); |
9a1c67e8 PS |
4253 | |
4254 | rc = adjust_credits(server, &rdata->credits, rdata->bytes); | |
4255 | if (rc) | |
335b7b62 | 4256 | goto async_readv_out; |
9a1c67e8 | 4257 | |
7fb8986e | 4258 | flags |= CIFS_HAS_CREDITS; |
bed9da02 PS |
4259 | } |
4260 | ||
09a4707e | 4261 | kref_get(&rdata->refcount); |
352d96f3 | 4262 | rc = cifs_call_async(server, &rqst, |
09a4707e | 4263 | cifs_readv_receive, smb2_readv_callback, |
3349c3a7 PS |
4264 | smb3_handle_read_data, rdata, flags, |
4265 | &rdata->credits); | |
e5d04887 | 4266 | if (rc) { |
09a4707e | 4267 | kref_put(&rdata->refcount, cifs_readdata_release); |
e5d04887 | 4268 | cifs_stats_fail_inc(io_parms.tcon, SMB2_READ_HE); |
7d42e72f PS |
4269 | trace_smb3_read_err(0 /* xid */, io_parms.persistent_fid, |
4270 | io_parms.tcon->tid, | |
4271 | io_parms.tcon->ses->Suid, | |
4272 | io_parms.offset, io_parms.length, rc); | |
4273 | } | |
09a4707e | 4274 | |
335b7b62 | 4275 | async_readv_out: |
09a4707e PS |
4276 | cifs_small_buf_release(buf); |
4277 | return rc; | |
4278 | } | |
33319141 | 4279 | |
d8e05039 PS |
4280 | int |
4281 | SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms, | |
4282 | unsigned int *nbytes, char **buf, int *buf_type) | |
4283 | { | |
40eff45b | 4284 | struct smb_rqst rqst; |
1efd4fc7 | 4285 | int resp_buftype, rc; |
d8d9de53 | 4286 | struct smb2_read_req *req = NULL; |
d8e05039 | 4287 | struct smb2_read_rsp *rsp = NULL; |
f5688a6d | 4288 | struct kvec iov[1]; |
da502f7d | 4289 | struct kvec rsp_iov; |
738f9de5 | 4290 | unsigned int total_len; |
7fb8986e PS |
4291 | int flags = CIFS_LOG_ERROR; |
4292 | struct cifs_ses *ses = io_parms->tcon->ses; | |
d8e05039 | 4293 | |
352d96f3 AA |
4294 | if (!io_parms->server) |
4295 | io_parms->server = cifs_pick_channel(io_parms->tcon->ses); | |
4296 | ||
d8e05039 | 4297 | *nbytes = 0; |
2dabfd5b | 4298 | rc = smb2_new_read_req((void **)&req, &total_len, io_parms, NULL, 0, 0); |
d8e05039 PS |
4299 | if (rc) |
4300 | return rc; | |
4301 | ||
5a77e75f | 4302 | if (smb3_encryption_required(io_parms->tcon)) |
7fb8986e PS |
4303 | flags |= CIFS_TRANSFORM_REQ; |
4304 | ||
f5688a6d RS |
4305 | iov[0].iov_base = (char *)req; |
4306 | iov[0].iov_len = total_len; | |
b8f57ee8 | 4307 | |
40eff45b RS |
4308 | memset(&rqst, 0, sizeof(struct smb_rqst)); |
4309 | rqst.rq_iov = iov; | |
4310 | rqst.rq_nvec = 1; | |
4311 | ||
352d96f3 AA |
4312 | rc = cifs_send_recv(xid, ses, io_parms->server, |
4313 | &rqst, &resp_buftype, flags, &rsp_iov); | |
da502f7d | 4314 | rsp = (struct smb2_read_rsp *)rsp_iov.iov_base; |
d8e05039 | 4315 | |
a821df3f RS |
4316 | if (rc) { |
4317 | if (rc != -ENODATA) { | |
4318 | cifs_stats_fail_inc(io_parms->tcon, SMB2_READ_HE); | |
4319 | cifs_dbg(VFS, "Send error in read = %d\n", rc); | |
d8d9de53 | 4320 | trace_smb3_read_err(xid, |
351a59da | 4321 | req->PersistentFileId, |
7d42e72f PS |
4322 | io_parms->tcon->tid, ses->Suid, |
4323 | io_parms->offset, io_parms->length, | |
4324 | rc); | |
b0a42f2a | 4325 | } else |
351a59da PA |
4326 | trace_smb3_read_done(xid, req->PersistentFileId, io_parms->tcon->tid, |
4327 | ses->Suid, io_parms->offset, 0); | |
da502f7d | 4328 | free_rsp_buf(resp_buftype, rsp_iov.iov_base); |
05fd5c2c | 4329 | cifs_small_buf_release(req); |
a821df3f | 4330 | return rc == -ENODATA ? 0 : rc; |
eccb4422 | 4331 | } else |
d8d9de53 | 4332 | trace_smb3_read_done(xid, |
351a59da | 4333 | req->PersistentFileId, |
eccb4422 SF |
4334 | io_parms->tcon->tid, ses->Suid, |
4335 | io_parms->offset, io_parms->length); | |
d8e05039 | 4336 | |
088aaf17 Z |
4337 | cifs_small_buf_release(req); |
4338 | ||
a821df3f RS |
4339 | *nbytes = le32_to_cpu(rsp->DataLength); |
4340 | if ((*nbytes > CIFS_MAX_MSGSIZE) || | |
4341 | (*nbytes > io_parms->length)) { | |
4342 | cifs_dbg(FYI, "bad length %d for count %d\n", | |
4343 | *nbytes, io_parms->length); | |
4344 | rc = -EIO; | |
4345 | *nbytes = 0; | |
d8e05039 PS |
4346 | } |
4347 | ||
4348 | if (*buf) { | |
977b6170 | 4349 | memcpy(*buf, (char *)rsp + rsp->DataOffset, *nbytes); |
da502f7d | 4350 | free_rsp_buf(resp_buftype, rsp_iov.iov_base); |
d8e05039 | 4351 | } else if (resp_buftype != CIFS_NO_BUFFER) { |
da502f7d | 4352 | *buf = rsp_iov.iov_base; |
d8e05039 PS |
4353 | if (resp_buftype == CIFS_SMALL_BUFFER) |
4354 | *buf_type = CIFS_SMALL_BUFFER; | |
4355 | else if (resp_buftype == CIFS_LARGE_BUFFER) | |
4356 | *buf_type = CIFS_LARGE_BUFFER; | |
4357 | } | |
4358 | return rc; | |
4359 | } | |
4360 | ||
33319141 PS |
4361 | /* |
4362 | * Check the mid_state and signature on received buffer (if any), and queue the | |
4363 | * workqueue completion task. | |
4364 | */ | |
4365 | static void | |
4366 | smb2_writev_callback(struct mid_q_entry *mid) | |
4367 | { | |
4368 | struct cifs_writedata *wdata = mid->callback_data; | |
4369 | struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink); | |
352d96f3 | 4370 | struct TCP_Server_Info *server = wdata->server; |
33319141 PS |
4371 | unsigned int written; |
4372 | struct smb2_write_rsp *rsp = (struct smb2_write_rsp *)mid->resp_buf; | |
34f4deb7 | 4373 | struct cifs_credits credits = { .value = 0, .instance = 0 }; |
33319141 | 4374 | |
352d96f3 AA |
4375 | WARN_ONCE(wdata->server != mid->server, |
4376 | "wdata server %p != mid server %p", | |
4377 | wdata->server, mid->server); | |
4378 | ||
33319141 PS |
4379 | switch (mid->mid_state) { |
4380 | case MID_RESPONSE_RECEIVED: | |
0d35e382 | 4381 | credits.value = le16_to_cpu(rsp->hdr.CreditRequest); |
34f4deb7 PS |
4382 | credits.instance = server->reconnect_instance; |
4383 | wdata->result = smb2_check_receive(mid, server, 0); | |
33319141 PS |
4384 | if (wdata->result != 0) |
4385 | break; | |
4386 | ||
4387 | written = le32_to_cpu(rsp->DataLength); | |
4388 | /* | |
4389 | * Mask off high 16 bits when bytes written as returned | |
4390 | * by the server is greater than bytes requested by the | |
4391 | * client. OS/2 servers are known to set incorrect | |
4392 | * CountHigh values. | |
4393 | */ | |
4394 | if (written > wdata->bytes) | |
4395 | written &= 0xFFFF; | |
4396 | ||
4397 | if (written < wdata->bytes) | |
4398 | wdata->result = -ENOSPC; | |
4399 | else | |
4400 | wdata->bytes = written; | |
4401 | break; | |
4402 | case MID_REQUEST_SUBMITTED: | |
4403 | case MID_RETRY_NEEDED: | |
4404 | wdata->result = -EAGAIN; | |
4405 | break; | |
0fd1d37b | 4406 | case MID_RESPONSE_MALFORMED: |
0d35e382 | 4407 | credits.value = le16_to_cpu(rsp->hdr.CreditRequest); |
34f4deb7 | 4408 | credits.instance = server->reconnect_instance; |
30b5ae21 | 4409 | fallthrough; |
33319141 PS |
4410 | default: |
4411 | wdata->result = -EIO; | |
4412 | break; | |
4413 | } | |
db223a59 LL |
4414 | #ifdef CONFIG_CIFS_SMB_DIRECT |
4415 | /* | |
4416 | * If this wdata has a memory registered, the MR can be freed | |
4417 | * The number of MRs available is limited, it's important to recover | |
4418 | * used MR as soon as I/O is finished. Hold MR longer in the later | |
4419 | * I/O process can possibly result in I/O deadlock due to lack of MR | |
4420 | * to send request on I/O retry | |
4421 | */ | |
4422 | if (wdata->mr) { | |
4423 | smbd_deregister_mr(wdata->mr); | |
4424 | wdata->mr = NULL; | |
4425 | } | |
4426 | #endif | |
7d42e72f | 4427 | if (wdata->result) { |
33319141 | 4428 | cifs_stats_fail_inc(tcon, SMB2_WRITE_HE); |
7d42e72f PS |
4429 | trace_smb3_write_err(0 /* no xid */, |
4430 | wdata->cfile->fid.persistent_fid, | |
4431 | tcon->tid, tcon->ses->Suid, wdata->offset, | |
4432 | wdata->bytes, wdata->result); | |
d6fd4190 | 4433 | if (wdata->result == -ENOSPC) |
a0a3036b JP |
4434 | pr_warn_once("Out of space writing to %s\n", |
4435 | tcon->treeName); | |
7d42e72f PS |
4436 | } else |
4437 | trace_smb3_write_done(0 /* no xid */, | |
4438 | wdata->cfile->fid.persistent_fid, | |
4439 | tcon->tid, tcon->ses->Suid, | |
4440 | wdata->offset, wdata->bytes); | |
33319141 PS |
4441 | |
4442 | queue_work(cifsiod_wq, &wdata->work); | |
4443 | DeleteMidQEntry(mid); | |
34f4deb7 | 4444 | add_credits(server, &credits, 0); |
33319141 PS |
4445 | } |
4446 | ||
4447 | /* smb2_async_writev - send an async write, and set up mid to handle result */ | |
4448 | int | |
4a5c80d7 SF |
4449 | smb2_async_writev(struct cifs_writedata *wdata, |
4450 | void (*release)(struct kref *kref)) | |
33319141 | 4451 | { |
cb7e9eab | 4452 | int rc = -EACCES, flags = 0; |
33319141 | 4453 | struct smb2_write_req *req = NULL; |
0d35e382 | 4454 | struct smb2_hdr *shdr; |
33319141 | 4455 | struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink); |
352d96f3 | 4456 | struct TCP_Server_Info *server = wdata->server; |
c713c877 | 4457 | struct kvec iov[1]; |
738f9de5 | 4458 | struct smb_rqst rqst = { }; |
f5688a6d | 4459 | unsigned int total_len; |
33319141 | 4460 | |
352d96f3 AA |
4461 | if (!wdata->server) |
4462 | server = wdata->server = cifs_pick_channel(tcon->ses); | |
4463 | ||
4464 | rc = smb2_plain_req_init(SMB2_WRITE, tcon, server, | |
4465 | (void **) &req, &total_len); | |
f0b93cb9 PS |
4466 | if (rc) |
4467 | return rc; | |
33319141 | 4468 | |
5a77e75f | 4469 | if (smb3_encryption_required(tcon)) |
7fb8986e PS |
4470 | flags |= CIFS_TRANSFORM_REQ; |
4471 | ||
0d35e382 RS |
4472 | shdr = (struct smb2_hdr *)req; |
4473 | shdr->Id.SyncId.ProcessId = cpu_to_le32(wdata->cfile->pid); | |
33319141 | 4474 | |
351a59da PA |
4475 | req->PersistentFileId = wdata->cfile->fid.persistent_fid; |
4476 | req->VolatileFileId = wdata->cfile->fid.volatile_fid; | |
33319141 PS |
4477 | req->WriteChannelInfoOffset = 0; |
4478 | req->WriteChannelInfoLength = 0; | |
4479 | req->Channel = 0; | |
4480 | req->Offset = cpu_to_le64(wdata->offset); | |
33319141 | 4481 | req->DataOffset = cpu_to_le16( |
f5688a6d | 4482 | offsetof(struct smb2_write_req, Buffer)); |
33319141 | 4483 | req->RemainingBytes = 0; |
d323c246 SF |
4484 | |
4485 | trace_smb3_write_enter(0 /* xid */, wdata->cfile->fid.persistent_fid, | |
4486 | tcon->tid, tcon->ses->Suid, wdata->offset, wdata->bytes); | |
db223a59 LL |
4487 | #ifdef CONFIG_CIFS_SMB_DIRECT |
4488 | /* | |
4489 | * If we want to do a server RDMA read, fill in and append | |
4490 | * smbd_buffer_descriptor_v1 to the end of write request | |
4491 | */ | |
bb4c0419 | 4492 | if (server->rdma && !server->sign && wdata->bytes >= |
db223a59 LL |
4493 | server->smbd_conn->rdma_readwrite_threshold) { |
4494 | ||
4495 | struct smbd_buffer_descriptor_v1 *v1; | |
4496 | bool need_invalidate = server->dialect == SMB30_PROT_ID; | |
4497 | ||
4498 | wdata->mr = smbd_register_mr( | |
4499 | server->smbd_conn, wdata->pages, | |
7cf20bce LL |
4500 | wdata->nr_pages, wdata->page_offset, |
4501 | wdata->tailsz, false, need_invalidate); | |
db223a59 | 4502 | if (!wdata->mr) { |
b7972092 | 4503 | rc = -EAGAIN; |
db223a59 LL |
4504 | goto async_writev_out; |
4505 | } | |
4506 | req->Length = 0; | |
4507 | req->DataOffset = 0; | |
7cf20bce LL |
4508 | if (wdata->nr_pages > 1) |
4509 | req->RemainingBytes = | |
4510 | cpu_to_le32( | |
4511 | (wdata->nr_pages - 1) * wdata->pagesz - | |
4512 | wdata->page_offset + wdata->tailsz | |
4513 | ); | |
4514 | else | |
4515 | req->RemainingBytes = cpu_to_le32(wdata->tailsz); | |
db223a59 LL |
4516 | req->Channel = SMB2_CHANNEL_RDMA_V1_INVALIDATE; |
4517 | if (need_invalidate) | |
4518 | req->Channel = SMB2_CHANNEL_RDMA_V1; | |
4519 | req->WriteChannelInfoOffset = | |
2026b06e | 4520 | cpu_to_le16(offsetof(struct smb2_write_req, Buffer)); |
db223a59 | 4521 | req->WriteChannelInfoLength = |
2026b06e | 4522 | cpu_to_le16(sizeof(struct smbd_buffer_descriptor_v1)); |
db223a59 | 4523 | v1 = (struct smbd_buffer_descriptor_v1 *) &req->Buffer[0]; |
2026b06e SF |
4524 | v1->offset = cpu_to_le64(wdata->mr->mr->iova); |
4525 | v1->token = cpu_to_le32(wdata->mr->mr->rkey); | |
4526 | v1->length = cpu_to_le32(wdata->mr->mr->length); | |
db223a59 LL |
4527 | } |
4528 | #endif | |
c713c877 RS |
4529 | iov[0].iov_len = total_len - 1; |
4530 | iov[0].iov_base = (char *)req; | |
33319141 | 4531 | |
738f9de5 | 4532 | rqst.rq_iov = iov; |
c713c877 | 4533 | rqst.rq_nvec = 1; |
eddb079d | 4534 | rqst.rq_pages = wdata->pages; |
57a929a6 | 4535 | rqst.rq_offset = wdata->page_offset; |
eddb079d JL |
4536 | rqst.rq_npages = wdata->nr_pages; |
4537 | rqst.rq_pagesz = wdata->pagesz; | |
4538 | rqst.rq_tailsz = wdata->tailsz; | |
db223a59 LL |
4539 | #ifdef CONFIG_CIFS_SMB_DIRECT |
4540 | if (wdata->mr) { | |
c713c877 | 4541 | iov[0].iov_len += sizeof(struct smbd_buffer_descriptor_v1); |
db223a59 LL |
4542 | rqst.rq_npages = 0; |
4543 | } | |
4544 | #endif | |
f96637be JP |
4545 | cifs_dbg(FYI, "async write at %llu %u bytes\n", |
4546 | wdata->offset, wdata->bytes); | |
33319141 | 4547 | |
db223a59 LL |
4548 | #ifdef CONFIG_CIFS_SMB_DIRECT |
4549 | /* For RDMA read, I/O size is in RemainingBytes not in Length */ | |
4550 | if (!wdata->mr) | |
4551 | req->Length = cpu_to_le32(wdata->bytes); | |
4552 | #else | |
33319141 | 4553 | req->Length = cpu_to_le32(wdata->bytes); |
db223a59 | 4554 | #endif |
33319141 | 4555 | |
335b7b62 | 4556 | if (wdata->credits.value > 0) { |
31473fc4 | 4557 | shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(wdata->bytes, |
cb7e9eab | 4558 | SMB2_MAX_BUFFER_SIZE)); |
88fd98a2 | 4559 | shdr->CreditRequest = cpu_to_le16(le16_to_cpu(shdr->CreditCharge) + 8); |
9a1c67e8 PS |
4560 | |
4561 | rc = adjust_credits(server, &wdata->credits, wdata->bytes); | |
4562 | if (rc) | |
335b7b62 | 4563 | goto async_writev_out; |
9a1c67e8 | 4564 | |
7fb8986e | 4565 | flags |= CIFS_HAS_CREDITS; |
cb7e9eab PS |
4566 | } |
4567 | ||
33319141 | 4568 | kref_get(&wdata->refcount); |
9b7c18a2 | 4569 | rc = cifs_call_async(server, &rqst, NULL, smb2_writev_callback, NULL, |
3349c3a7 | 4570 | wdata, flags, &wdata->credits); |
33319141 | 4571 | |
e5d04887 | 4572 | if (rc) { |
d8d9de53 | 4573 | trace_smb3_write_err(0 /* no xid */, |
351a59da | 4574 | req->PersistentFileId, |
eccb4422 SF |
4575 | tcon->tid, tcon->ses->Suid, wdata->offset, |
4576 | wdata->bytes, rc); | |
4a5c80d7 | 4577 | kref_put(&wdata->refcount, release); |
e5d04887 | 4578 | cifs_stats_fail_inc(tcon, SMB2_WRITE_HE); |
7d42e72f | 4579 | } |
33319141 | 4580 | |
33319141 PS |
4581 | async_writev_out: |
4582 | cifs_small_buf_release(req); | |
33319141 PS |
4583 | return rc; |
4584 | } | |
009d3443 PS |
4585 | |
4586 | /* | |
4587 | * SMB2_write function gets iov pointer to kvec array with n_vec as a length. | |
4588 | * The length field from io_parms must be at least 1 and indicates a number of | |
4589 | * elements with data to write that begins with position 1 in iov array. All | |
4590 | * data length is specified by count. | |
4591 | */ | |
4592 | int | |
4593 | SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms, | |
4594 | unsigned int *nbytes, struct kvec *iov, int n_vec) | |
4595 | { | |
40eff45b | 4596 | struct smb_rqst rqst; |
009d3443 PS |
4597 | int rc = 0; |
4598 | struct smb2_write_req *req = NULL; | |
4599 | struct smb2_write_rsp *rsp = NULL; | |
4600 | int resp_buftype; | |
da502f7d | 4601 | struct kvec rsp_iov; |
7fb8986e | 4602 | int flags = 0; |
f5688a6d | 4603 | unsigned int total_len; |
352d96f3 | 4604 | struct TCP_Server_Info *server; |
da502f7d | 4605 | |
009d3443 PS |
4606 | *nbytes = 0; |
4607 | ||
4608 | if (n_vec < 1) | |
4609 | return rc; | |
4610 | ||
352d96f3 AA |
4611 | if (!io_parms->server) |
4612 | io_parms->server = cifs_pick_channel(io_parms->tcon->ses); | |
4613 | server = io_parms->server; | |
4614 | if (server == NULL) | |
4615 | return -ECONNABORTED; | |
4616 | ||
4617 | rc = smb2_plain_req_init(SMB2_WRITE, io_parms->tcon, server, | |
4618 | (void **) &req, &total_len); | |
009d3443 PS |
4619 | if (rc) |
4620 | return rc; | |
4621 | ||
5a77e75f | 4622 | if (smb3_encryption_required(io_parms->tcon)) |
7fb8986e PS |
4623 | flags |= CIFS_TRANSFORM_REQ; |
4624 | ||
0d35e382 | 4625 | req->hdr.Id.SyncId.ProcessId = cpu_to_le32(io_parms->pid); |
009d3443 | 4626 | |
351a59da PA |
4627 | req->PersistentFileId = io_parms->persistent_fid; |
4628 | req->VolatileFileId = io_parms->volatile_fid; | |
009d3443 PS |
4629 | req->WriteChannelInfoOffset = 0; |
4630 | req->WriteChannelInfoLength = 0; | |
4631 | req->Channel = 0; | |
4632 | req->Length = cpu_to_le32(io_parms->length); | |
4633 | req->Offset = cpu_to_le64(io_parms->offset); | |
009d3443 | 4634 | req->DataOffset = cpu_to_le16( |
f5688a6d | 4635 | offsetof(struct smb2_write_req, Buffer)); |
009d3443 PS |
4636 | req->RemainingBytes = 0; |
4637 | ||
d323c246 SF |
4638 | trace_smb3_write_enter(xid, io_parms->persistent_fid, |
4639 | io_parms->tcon->tid, io_parms->tcon->ses->Suid, | |
4640 | io_parms->offset, io_parms->length); | |
4641 | ||
009d3443 | 4642 | iov[0].iov_base = (char *)req; |
f5688a6d RS |
4643 | /* 1 for Buffer */ |
4644 | iov[0].iov_len = total_len - 1; | |
009d3443 | 4645 | |
40eff45b RS |
4646 | memset(&rqst, 0, sizeof(struct smb_rqst)); |
4647 | rqst.rq_iov = iov; | |
4648 | rqst.rq_nvec = n_vec + 1; | |
4649 | ||
352d96f3 AA |
4650 | rc = cifs_send_recv(xid, io_parms->tcon->ses, server, |
4651 | &rqst, | |
f5688a6d | 4652 | &resp_buftype, flags, &rsp_iov); |
da502f7d | 4653 | rsp = (struct smb2_write_rsp *)rsp_iov.iov_base; |
009d3443 PS |
4654 | |
4655 | if (rc) { | |
d8d9de53 | 4656 | trace_smb3_write_err(xid, |
351a59da | 4657 | req->PersistentFileId, |
eccb4422 SF |
4658 | io_parms->tcon->tid, |
4659 | io_parms->tcon->ses->Suid, | |
4660 | io_parms->offset, io_parms->length, rc); | |
009d3443 | 4661 | cifs_stats_fail_inc(io_parms->tcon, SMB2_WRITE_HE); |
f96637be | 4662 | cifs_dbg(VFS, "Send error in write = %d\n", rc); |
eccb4422 | 4663 | } else { |
009d3443 | 4664 | *nbytes = le32_to_cpu(rsp->DataLength); |
d8d9de53 | 4665 | trace_smb3_write_done(xid, |
351a59da | 4666 | req->PersistentFileId, |
d8d9de53 RS |
4667 | io_parms->tcon->tid, |
4668 | io_parms->tcon->ses->Suid, | |
4669 | io_parms->offset, *nbytes); | |
eccb4422 | 4670 | } |
e5d04887 | 4671 | |
6a3eb336 | 4672 | cifs_small_buf_release(req); |
e5d04887 | 4673 | free_rsp_buf(resp_buftype, rsp); |
009d3443 PS |
4674 | return rc; |
4675 | } | |
35143eb5 | 4676 | |
69dda305 | 4677 | int posix_info_sid_size(const void *beg, const void *end) |
349e13ad AA |
4678 | { |
4679 | size_t subauth; | |
4680 | int total; | |
4681 | ||
4682 | if (beg + 1 > end) | |
4683 | return -1; | |
4684 | ||
4685 | subauth = *(u8 *)(beg+1); | |
4686 | if (subauth < 1 || subauth > 15) | |
4687 | return -1; | |
4688 | ||
4689 | total = 1 + 1 + 6 + 4*subauth; | |
4690 | if (beg + total > end) | |
4691 | return -1; | |
4692 | ||
4693 | return total; | |
4694 | } | |
4695 | ||
4696 | int posix_info_parse(const void *beg, const void *end, | |
4697 | struct smb2_posix_info_parsed *out) | |
4698 | ||
4699 | { | |
4700 | int total_len = 0; | |
ca38fabc | 4701 | int owner_len, group_len; |
349e13ad AA |
4702 | int name_len; |
4703 | const void *owner_sid; | |
4704 | const void *group_sid; | |
4705 | const void *name; | |
4706 | ||
4707 | /* if no end bound given, assume payload to be correct */ | |
4708 | if (!end) { | |
4709 | const struct smb2_posix_info *p = beg; | |
4710 | ||
4711 | end = beg + le32_to_cpu(p->NextEntryOffset); | |
4712 | /* last element will have a 0 offset, pick a sensible bound */ | |
4713 | if (end == beg) | |
4714 | end += 0xFFFF; | |
4715 | } | |
4716 | ||
4717 | /* check base buf */ | |
4718 | if (beg + sizeof(struct smb2_posix_info) > end) | |
4719 | return -1; | |
4720 | total_len = sizeof(struct smb2_posix_info); | |
4721 | ||
4722 | /* check owner sid */ | |
4723 | owner_sid = beg + total_len; | |
ca38fabc RS |
4724 | owner_len = posix_info_sid_size(owner_sid, end); |
4725 | if (owner_len < 0) | |
349e13ad | 4726 | return -1; |
ca38fabc | 4727 | total_len += owner_len; |
349e13ad AA |
4728 | |
4729 | /* check group sid */ | |
4730 | group_sid = beg + total_len; | |
ca38fabc RS |
4731 | group_len = posix_info_sid_size(group_sid, end); |
4732 | if (group_len < 0) | |
349e13ad | 4733 | return -1; |
ca38fabc | 4734 | total_len += group_len; |
349e13ad AA |
4735 | |
4736 | /* check name len */ | |
4737 | if (beg + total_len + 4 > end) | |
4738 | return -1; | |
4739 | name_len = le32_to_cpu(*(__le32 *)(beg + total_len)); | |
4740 | if (name_len < 1 || name_len > 0xFFFF) | |
4741 | return -1; | |
4742 | total_len += 4; | |
4743 | ||
4744 | /* check name */ | |
4745 | name = beg + total_len; | |
4746 | if (name + name_len > end) | |
4747 | return -1; | |
4748 | total_len += name_len; | |
4749 | ||
4750 | if (out) { | |
4751 | out->base = beg; | |
4752 | out->size = total_len; | |
4753 | out->name_len = name_len; | |
4754 | out->name = name; | |
ca38fabc RS |
4755 | memcpy(&out->owner, owner_sid, owner_len); |
4756 | memcpy(&out->group, group_sid, group_len); | |
349e13ad AA |
4757 | } |
4758 | return total_len; | |
4759 | } | |
4760 | ||
4761 | static int posix_info_extra_size(const void *beg, const void *end) | |
4762 | { | |
4763 | int len = posix_info_parse(beg, end, NULL); | |
4764 | ||
4765 | if (len < 0) | |
4766 | return -1; | |
4767 | return len - sizeof(struct smb2_posix_info); | |
4768 | } | |
4769 | ||
d324f08d | 4770 | static unsigned int |
3d519bd1 AA |
4771 | num_entries(int infotype, char *bufstart, char *end_of_buf, char **lastentry, |
4772 | size_t size) | |
d324f08d PS |
4773 | { |
4774 | int len; | |
4775 | unsigned int entrycount = 0; | |
4776 | unsigned int next_offset = 0; | |
56446f21 DC |
4777 | char *entryptr; |
4778 | FILE_DIRECTORY_INFO *dir_info; | |
d324f08d PS |
4779 | |
4780 | if (bufstart == NULL) | |
4781 | return 0; | |
4782 | ||
56446f21 | 4783 | entryptr = bufstart; |
d324f08d PS |
4784 | |
4785 | while (1) { | |
56446f21 DC |
4786 | if (entryptr + next_offset < entryptr || |
4787 | entryptr + next_offset > end_of_buf || | |
4788 | entryptr + next_offset + size > end_of_buf) { | |
f96637be | 4789 | cifs_dbg(VFS, "malformed search entry would overflow\n"); |
d324f08d PS |
4790 | break; |
4791 | } | |
4792 | ||
56446f21 DC |
4793 | entryptr = entryptr + next_offset; |
4794 | dir_info = (FILE_DIRECTORY_INFO *)entryptr; | |
4795 | ||
3d519bd1 AA |
4796 | if (infotype == SMB_FIND_FILE_POSIX_INFO) |
4797 | len = posix_info_extra_size(entryptr, end_of_buf); | |
4798 | else | |
4799 | len = le32_to_cpu(dir_info->FileNameLength); | |
4800 | ||
4801 | if (len < 0 || | |
4802 | entryptr + len < entryptr || | |
56446f21 DC |
4803 | entryptr + len > end_of_buf || |
4804 | entryptr + len + size > end_of_buf) { | |
f96637be JP |
4805 | cifs_dbg(VFS, "directory entry name would overflow frame end of buf %p\n", |
4806 | end_of_buf); | |
d324f08d PS |
4807 | break; |
4808 | } | |
4809 | ||
56446f21 | 4810 | *lastentry = entryptr; |
d324f08d PS |
4811 | entrycount++; |
4812 | ||
56446f21 | 4813 | next_offset = le32_to_cpu(dir_info->NextEntryOffset); |
d324f08d PS |
4814 | if (!next_offset) |
4815 | break; | |
4816 | } | |
4817 | ||
4818 | return entrycount; | |
4819 | } | |
4820 | ||
4821 | /* | |
4822 | * Readdir/FindFirst | |
4823 | */ | |
0a17799c | 4824 | int SMB2_query_directory_init(const unsigned int xid, |
352d96f3 AA |
4825 | struct cifs_tcon *tcon, |
4826 | struct TCP_Server_Info *server, | |
4827 | struct smb_rqst *rqst, | |
0a17799c RS |
4828 | u64 persistent_fid, u64 volatile_fid, |
4829 | int index, int info_level) | |
d324f08d PS |
4830 | { |
4831 | struct smb2_query_directory_req *req; | |
d324f08d | 4832 | unsigned char *bufptr; |
d324f08d | 4833 | __le16 asteriks = cpu_to_le16('*'); |
0a17799c RS |
4834 | unsigned int output_size = CIFSMaxBufSize - |
4835 | MAX_SMB2_CREATE_RESPONSE_SIZE - | |
4836 | MAX_SMB2_CLOSE_RESPONSE_SIZE; | |
7c00c3a6 | 4837 | unsigned int total_len; |
0a17799c RS |
4838 | struct kvec *iov = rqst->rq_iov; |
4839 | int len, rc; | |
d324f08d | 4840 | |
352d96f3 AA |
4841 | rc = smb2_plain_req_init(SMB2_QUERY_DIRECTORY, tcon, server, |
4842 | (void **) &req, &total_len); | |
d324f08d PS |
4843 | if (rc) |
4844 | return rc; | |
4845 | ||
0a17799c | 4846 | switch (info_level) { |
d324f08d PS |
4847 | case SMB_FIND_FILE_DIRECTORY_INFO: |
4848 | req->FileInformationClass = FILE_DIRECTORY_INFORMATION; | |
d324f08d PS |
4849 | break; |
4850 | case SMB_FIND_FILE_ID_FULL_DIR_INFO: | |
4851 | req->FileInformationClass = FILEID_FULL_DIRECTORY_INFORMATION; | |
d324f08d | 4852 | break; |
3d519bd1 AA |
4853 | case SMB_FIND_FILE_POSIX_INFO: |
4854 | req->FileInformationClass = SMB_FIND_FILE_POSIX_INFO; | |
4855 | break; | |
d324f08d | 4856 | default: |
3175eb9b | 4857 | cifs_tcon_dbg(VFS, "info level %u isn't supported\n", |
0a17799c RS |
4858 | info_level); |
4859 | return -EINVAL; | |
d324f08d PS |
4860 | } |
4861 | ||
4862 | req->FileIndex = cpu_to_le32(index); | |
4863 | req->PersistentFileId = persistent_fid; | |
4864 | req->VolatileFileId = volatile_fid; | |
4865 | ||
4866 | len = 0x2; | |
4867 | bufptr = req->Buffer; | |
4868 | memcpy(bufptr, &asteriks, len); | |
4869 | ||
4870 | req->FileNameOffset = | |
7c00c3a6 | 4871 | cpu_to_le16(sizeof(struct smb2_query_directory_req) - 1); |
d324f08d PS |
4872 | req->FileNameLength = cpu_to_le16(len); |
4873 | /* | |
4874 | * BB could be 30 bytes or so longer if we used SMB2 specific | |
4875 | * buffer lengths, but this is safe and close enough. | |
4876 | */ | |
4877 | output_size = min_t(unsigned int, output_size, server->maxBuf); | |
4878 | output_size = min_t(unsigned int, output_size, 2 << 15); | |
4879 | req->OutputBufferLength = cpu_to_le32(output_size); | |
4880 | ||
4881 | iov[0].iov_base = (char *)req; | |
7c00c3a6 RS |
4882 | /* 1 for Buffer */ |
4883 | iov[0].iov_len = total_len - 1; | |
d324f08d PS |
4884 | |
4885 | iov[1].iov_base = (char *)(req->Buffer); | |
4886 | iov[1].iov_len = len; | |
4887 | ||
0a17799c RS |
4888 | trace_smb3_query_dir_enter(xid, persistent_fid, tcon->tid, |
4889 | tcon->ses->Suid, index, output_size); | |
4890 | ||
4891 | return 0; | |
4892 | } | |
4893 | ||
4894 | void SMB2_query_directory_free(struct smb_rqst *rqst) | |
4895 | { | |
4896 | if (rqst && rqst->rq_iov) { | |
4897 | cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */ | |
4898 | } | |
4899 | } | |
4900 | ||
af08f9e7 RS |
4901 | int |
4902 | smb2_parse_query_directory(struct cifs_tcon *tcon, | |
4903 | struct kvec *rsp_iov, | |
4904 | int resp_buftype, | |
4905 | struct cifs_search_info *srch_inf) | |
4906 | { | |
4907 | struct smb2_query_directory_rsp *rsp; | |
4908 | size_t info_buf_size; | |
4909 | char *end_of_smb; | |
4910 | int rc; | |
4911 | ||
4912 | rsp = (struct smb2_query_directory_rsp *)rsp_iov->iov_base; | |
4913 | ||
4914 | switch (srch_inf->info_level) { | |
4915 | case SMB_FIND_FILE_DIRECTORY_INFO: | |
4916 | info_buf_size = sizeof(FILE_DIRECTORY_INFO) - 1; | |
4917 | break; | |
4918 | case SMB_FIND_FILE_ID_FULL_DIR_INFO: | |
4919 | info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO) - 1; | |
4920 | break; | |
3d519bd1 AA |
4921 | case SMB_FIND_FILE_POSIX_INFO: |
4922 | /* note that posix payload are variable size */ | |
4923 | info_buf_size = sizeof(struct smb2_posix_info); | |
4924 | break; | |
af08f9e7 RS |
4925 | default: |
4926 | cifs_tcon_dbg(VFS, "info level %u isn't supported\n", | |
4927 | srch_inf->info_level); | |
4928 | return -EINVAL; | |
4929 | } | |
4930 | ||
4931 | rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset), | |
4932 | le32_to_cpu(rsp->OutputBufferLength), rsp_iov, | |
4933 | info_buf_size); | |
3d519bd1 AA |
4934 | if (rc) { |
4935 | cifs_tcon_dbg(VFS, "bad info payload"); | |
af08f9e7 | 4936 | return rc; |
3d519bd1 | 4937 | } |
af08f9e7 RS |
4938 | |
4939 | srch_inf->unicode = true; | |
4940 | ||
4941 | if (srch_inf->ntwrk_buf_start) { | |
4942 | if (srch_inf->smallBuf) | |
4943 | cifs_small_buf_release(srch_inf->ntwrk_buf_start); | |
4944 | else | |
4945 | cifs_buf_release(srch_inf->ntwrk_buf_start); | |
4946 | } | |
4947 | srch_inf->ntwrk_buf_start = (char *)rsp; | |
4948 | srch_inf->srch_entries_start = srch_inf->last_entry = | |
4949 | (char *)rsp + le16_to_cpu(rsp->OutputBufferOffset); | |
4950 | end_of_smb = rsp_iov->iov_len + (char *)rsp; | |
3d519bd1 AA |
4951 | |
4952 | srch_inf->entries_in_buffer = num_entries( | |
4953 | srch_inf->info_level, | |
4954 | srch_inf->srch_entries_start, | |
4955 | end_of_smb, | |
4956 | &srch_inf->last_entry, | |
4957 | info_buf_size); | |
4958 | ||
af08f9e7 RS |
4959 | srch_inf->index_of_last_entry += srch_inf->entries_in_buffer; |
4960 | cifs_dbg(FYI, "num entries %d last_index %lld srch start %p srch end %p\n", | |
4961 | srch_inf->entries_in_buffer, srch_inf->index_of_last_entry, | |
4962 | srch_inf->srch_entries_start, srch_inf->last_entry); | |
4963 | if (resp_buftype == CIFS_LARGE_BUFFER) | |
4964 | srch_inf->smallBuf = false; | |
4965 | else if (resp_buftype == CIFS_SMALL_BUFFER) | |
4966 | srch_inf->smallBuf = true; | |
4967 | else | |
a0a3036b | 4968 | cifs_tcon_dbg(VFS, "Invalid search buffer type\n"); |
af08f9e7 RS |
4969 | |
4970 | return 0; | |
4971 | } | |
4972 | ||
0a17799c RS |
4973 | int |
4974 | SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon, | |
4975 | u64 persistent_fid, u64 volatile_fid, int index, | |
4976 | struct cifs_search_info *srch_inf) | |
4977 | { | |
4978 | struct smb_rqst rqst; | |
4979 | struct kvec iov[SMB2_QUERY_DIRECTORY_IOV_SIZE]; | |
4980 | struct smb2_query_directory_rsp *rsp = NULL; | |
4981 | int resp_buftype = CIFS_NO_BUFFER; | |
4982 | struct kvec rsp_iov; | |
4983 | int rc = 0; | |
0a17799c | 4984 | struct cifs_ses *ses = tcon->ses; |
352d96f3 | 4985 | struct TCP_Server_Info *server = cifs_pick_channel(ses); |
0a17799c RS |
4986 | int flags = 0; |
4987 | ||
c4985c3d | 4988 | if (!ses || !(ses->server)) |
0a17799c RS |
4989 | return -EIO; |
4990 | ||
4991 | if (smb3_encryption_required(tcon)) | |
4992 | flags |= CIFS_TRANSFORM_REQ; | |
4993 | ||
40eff45b | 4994 | memset(&rqst, 0, sizeof(struct smb_rqst)); |
0a17799c | 4995 | memset(&iov, 0, sizeof(iov)); |
40eff45b | 4996 | rqst.rq_iov = iov; |
0a17799c | 4997 | rqst.rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE; |
40eff45b | 4998 | |
352d96f3 AA |
4999 | rc = SMB2_query_directory_init(xid, tcon, server, |
5000 | &rqst, persistent_fid, | |
0a17799c RS |
5001 | volatile_fid, index, |
5002 | srch_inf->info_level); | |
5003 | if (rc) | |
5004 | goto qdir_exit; | |
d323c246 | 5005 | |
352d96f3 AA |
5006 | rc = cifs_send_recv(xid, ses, server, |
5007 | &rqst, &resp_buftype, flags, &rsp_iov); | |
da502f7d | 5008 | rsp = (struct smb2_query_directory_rsp *)rsp_iov.iov_base; |
e5d04887 | 5009 | |
d324f08d | 5010 | if (rc) { |
31473fc4 | 5011 | if (rc == -ENODATA && |
0d35e382 | 5012 | rsp->hdr.Status == STATUS_NO_MORE_FILES) { |
adb3b4e9 SF |
5013 | trace_smb3_query_dir_done(xid, persistent_fid, |
5014 | tcon->tid, tcon->ses->Suid, index, 0); | |
52755808 PS |
5015 | srch_inf->endOfSearch = true; |
5016 | rc = 0; | |
adb3b4e9 SF |
5017 | } else { |
5018 | trace_smb3_query_dir_err(xid, persistent_fid, tcon->tid, | |
5019 | tcon->ses->Suid, index, 0, rc); | |
8e6e72ae | 5020 | cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE); |
adb3b4e9 | 5021 | } |
d324f08d PS |
5022 | goto qdir_exit; |
5023 | } | |
d324f08d | 5024 | |
af08f9e7 RS |
5025 | rc = smb2_parse_query_directory(tcon, &rsp_iov, resp_buftype, |
5026 | srch_inf); | |
adb3b4e9 SF |
5027 | if (rc) { |
5028 | trace_smb3_query_dir_err(xid, persistent_fid, tcon->tid, | |
5029 | tcon->ses->Suid, index, 0, rc); | |
d324f08d | 5030 | goto qdir_exit; |
adb3b4e9 | 5031 | } |
0a17799c RS |
5032 | resp_buftype = CIFS_NO_BUFFER; |
5033 | ||
adb3b4e9 SF |
5034 | trace_smb3_query_dir_done(xid, persistent_fid, tcon->tid, |
5035 | tcon->ses->Suid, index, srch_inf->entries_in_buffer); | |
d324f08d PS |
5036 | |
5037 | qdir_exit: | |
0a17799c | 5038 | SMB2_query_directory_free(&rqst); |
d324f08d PS |
5039 | free_rsp_buf(resp_buftype, rsp); |
5040 | return rc; | |
5041 | } | |
5042 | ||
ba8ca116 | 5043 | int |
352d96f3 AA |
5044 | SMB2_set_info_init(struct cifs_tcon *tcon, struct TCP_Server_Info *server, |
5045 | struct smb_rqst *rqst, | |
5046 | u64 persistent_fid, u64 volatile_fid, u32 pid, | |
5047 | u8 info_class, u8 info_type, u32 additional_info, | |
5048 | void **data, unsigned int *size) | |
35143eb5 PS |
5049 | { |
5050 | struct smb2_set_info_req *req; | |
ba8ca116 RS |
5051 | struct kvec *iov = rqst->rq_iov; |
5052 | unsigned int i, total_len; | |
5053 | int rc; | |
35143eb5 | 5054 | |
352d96f3 AA |
5055 | rc = smb2_plain_req_init(SMB2_SET_INFO, tcon, server, |
5056 | (void **) &req, &total_len); | |
ba8ca116 | 5057 | if (rc) |
35143eb5 | 5058 | return rc; |
7fb8986e | 5059 | |
0d35e382 | 5060 | req->hdr.Id.SyncId.ProcessId = cpu_to_le32(pid); |
dac95340 | 5061 | req->InfoType = info_type; |
35143eb5 PS |
5062 | req->FileInfoClass = info_class; |
5063 | req->PersistentFileId = persistent_fid; | |
5064 | req->VolatileFileId = volatile_fid; | |
dac95340 | 5065 | req->AdditionalInformation = cpu_to_le32(additional_info); |
35143eb5 | 5066 | |
35143eb5 | 5067 | req->BufferOffset = |
2fc803ef | 5068 | cpu_to_le16(sizeof(struct smb2_set_info_req) - 1); |
35143eb5 PS |
5069 | req->BufferLength = cpu_to_le32(*size); |
5070 | ||
35143eb5 | 5071 | memcpy(req->Buffer, *data, *size); |
2fc803ef | 5072 | total_len += *size; |
35143eb5 PS |
5073 | |
5074 | iov[0].iov_base = (char *)req; | |
2fc803ef RS |
5075 | /* 1 for Buffer */ |
5076 | iov[0].iov_len = total_len - 1; | |
35143eb5 | 5077 | |
ba8ca116 | 5078 | for (i = 1; i < rqst->rq_nvec; i++) { |
35143eb5 PS |
5079 | le32_add_cpu(&req->BufferLength, size[i]); |
5080 | iov[i].iov_base = (char *)data[i]; | |
5081 | iov[i].iov_len = size[i]; | |
5082 | } | |
5083 | ||
ba8ca116 RS |
5084 | return 0; |
5085 | } | |
5086 | ||
5087 | void | |
5088 | SMB2_set_info_free(struct smb_rqst *rqst) | |
5089 | { | |
32a1fb36 RS |
5090 | if (rqst && rqst->rq_iov) |
5091 | cifs_buf_release(rqst->rq_iov[0].iov_base); /* request */ | |
ba8ca116 RS |
5092 | } |
5093 | ||
5094 | static int | |
5095 | send_set_info(const unsigned int xid, struct cifs_tcon *tcon, | |
5096 | u64 persistent_fid, u64 volatile_fid, u32 pid, u8 info_class, | |
5097 | u8 info_type, u32 additional_info, unsigned int num, | |
5098 | void **data, unsigned int *size) | |
5099 | { | |
5100 | struct smb_rqst rqst; | |
5101 | struct smb2_set_info_rsp *rsp = NULL; | |
5102 | struct kvec *iov; | |
5103 | struct kvec rsp_iov; | |
5104 | int rc = 0; | |
5105 | int resp_buftype; | |
5106 | struct cifs_ses *ses = tcon->ses; | |
352d96f3 | 5107 | struct TCP_Server_Info *server = cifs_pick_channel(ses); |
ba8ca116 RS |
5108 | int flags = 0; |
5109 | ||
352d96f3 | 5110 | if (!ses || !server) |
ba8ca116 RS |
5111 | return -EIO; |
5112 | ||
5113 | if (!num) | |
5114 | return -EINVAL; | |
5115 | ||
5116 | if (smb3_encryption_required(tcon)) | |
5117 | flags |= CIFS_TRANSFORM_REQ; | |
5118 | ||
5119 | iov = kmalloc_array(num, sizeof(struct kvec), GFP_KERNEL); | |
5120 | if (!iov) | |
5121 | return -ENOMEM; | |
5122 | ||
40eff45b RS |
5123 | memset(&rqst, 0, sizeof(struct smb_rqst)); |
5124 | rqst.rq_iov = iov; | |
5125 | rqst.rq_nvec = num; | |
5126 | ||
352d96f3 AA |
5127 | rc = SMB2_set_info_init(tcon, server, |
5128 | &rqst, persistent_fid, volatile_fid, pid, | |
ba8ca116 RS |
5129 | info_class, info_type, additional_info, |
5130 | data, size); | |
5131 | if (rc) { | |
5132 | kfree(iov); | |
5133 | return rc; | |
5134 | } | |
5135 | ||
5136 | ||
352d96f3 AA |
5137 | rc = cifs_send_recv(xid, ses, server, |
5138 | &rqst, &resp_buftype, flags, | |
2fc803ef | 5139 | &rsp_iov); |
ba8ca116 | 5140 | SMB2_set_info_free(&rqst); |
da502f7d | 5141 | rsp = (struct smb2_set_info_rsp *)rsp_iov.iov_base; |
35143eb5 | 5142 | |
eccb4422 | 5143 | if (rc != 0) { |
35143eb5 | 5144 | cifs_stats_fail_inc(tcon, SMB2_SET_INFO_HE); |
eccb4422 SF |
5145 | trace_smb3_set_info_err(xid, persistent_fid, tcon->tid, |
5146 | ses->Suid, info_class, (__u32)info_type, rc); | |
5147 | } | |
7d3fb24b | 5148 | |
35143eb5 PS |
5149 | free_rsp_buf(resp_buftype, rsp); |
5150 | kfree(iov); | |
5151 | return rc; | |
5152 | } | |
5153 | ||
c839ff24 PS |
5154 | int |
5155 | SMB2_set_eof(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, | |
3764cbd1 | 5156 | u64 volatile_fid, u32 pid, __le64 *eof) |
c839ff24 PS |
5157 | { |
5158 | struct smb2_file_eof_info info; | |
5159 | void *data; | |
5160 | unsigned int size; | |
5161 | ||
5162 | info.EndOfFile = *eof; | |
5163 | ||
5164 | data = &info; | |
5165 | size = sizeof(struct smb2_file_eof_info); | |
5166 | ||
7c05eae8 SF |
5167 | trace_smb3_set_eof(xid, persistent_fid, tcon->tid, tcon->ses->Suid, le64_to_cpu(*eof)); |
5168 | ||
3764cbd1 | 5169 | return send_set_info(xid, tcon, persistent_fid, volatile_fid, |
dac95340 SP |
5170 | pid, FILE_END_OF_FILE_INFORMATION, SMB2_O_INFO_FILE, |
5171 | 0, 1, &data, &size); | |
c839ff24 | 5172 | } |
1feeaac7 | 5173 | |
dac95340 SP |
5174 | int |
5175 | SMB2_set_acl(const unsigned int xid, struct cifs_tcon *tcon, | |
5176 | u64 persistent_fid, u64 volatile_fid, | |
5177 | struct cifs_ntsd *pnntsd, int pacllen, int aclflag) | |
5178 | { | |
5179 | return send_set_info(xid, tcon, persistent_fid, volatile_fid, | |
5180 | current->tgid, 0, SMB2_O_INFO_SECURITY, aclflag, | |
5181 | 1, (void **)&pnntsd, &pacllen); | |
1feeaac7 | 5182 | } |
983c88a4 | 5183 | |
5517554e RS |
5184 | int |
5185 | SMB2_set_ea(const unsigned int xid, struct cifs_tcon *tcon, | |
5186 | u64 persistent_fid, u64 volatile_fid, | |
5187 | struct smb2_file_full_ea_info *buf, int len) | |
5188 | { | |
5189 | return send_set_info(xid, tcon, persistent_fid, volatile_fid, | |
5190 | current->tgid, FILE_FULL_EA_INFORMATION, SMB2_O_INFO_FILE, | |
5191 | 0, 1, (void **)&buf, &len); | |
5192 | } | |
5193 | ||
983c88a4 PS |
5194 | int |
5195 | SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon, | |
5196 | const u64 persistent_fid, const u64 volatile_fid, | |
5197 | __u8 oplock_level) | |
5198 | { | |
40eff45b | 5199 | struct smb_rqst rqst; |
983c88a4 | 5200 | int rc; |
0d5a288d | 5201 | struct smb2_oplock_break *req = NULL; |
21ad9487 | 5202 | struct cifs_ses *ses = tcon->ses; |
352d96f3 | 5203 | struct TCP_Server_Info *server = cifs_pick_channel(ses); |
7fb8986e | 5204 | int flags = CIFS_OBREAK_OP; |
21ad9487 RS |
5205 | unsigned int total_len; |
5206 | struct kvec iov[1]; | |
5207 | struct kvec rsp_iov; | |
5208 | int resp_buf_type; | |
983c88a4 | 5209 | |
f96637be | 5210 | cifs_dbg(FYI, "SMB2_oplock_break\n"); |
352d96f3 AA |
5211 | rc = smb2_plain_req_init(SMB2_OPLOCK_BREAK, tcon, server, |
5212 | (void **) &req, &total_len); | |
983c88a4 PS |
5213 | if (rc) |
5214 | return rc; | |
5215 | ||
5a77e75f | 5216 | if (smb3_encryption_required(tcon)) |
7fb8986e PS |
5217 | flags |= CIFS_TRANSFORM_REQ; |
5218 | ||
983c88a4 PS |
5219 | req->VolatileFid = volatile_fid; |
5220 | req->PersistentFid = persistent_fid; | |
5221 | req->OplockLevel = oplock_level; | |
0d35e382 | 5222 | req->hdr.CreditRequest = cpu_to_le16(1); |
983c88a4 | 5223 | |
392e1c5d | 5224 | flags |= CIFS_NO_RSP_BUF; |
21ad9487 RS |
5225 | |
5226 | iov[0].iov_base = (char *)req; | |
5227 | iov[0].iov_len = total_len; | |
5228 | ||
40eff45b RS |
5229 | memset(&rqst, 0, sizeof(struct smb_rqst)); |
5230 | rqst.rq_iov = iov; | |
5231 | rqst.rq_nvec = 1; | |
5232 | ||
352d96f3 AA |
5233 | rc = cifs_send_recv(xid, ses, server, |
5234 | &rqst, &resp_buf_type, flags, &rsp_iov); | |
da502f7d | 5235 | cifs_small_buf_release(req); |
983c88a4 PS |
5236 | |
5237 | if (rc) { | |
5238 | cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE); | |
f96637be | 5239 | cifs_dbg(FYI, "Send error in Oplock Break = %d\n", rc); |
983c88a4 PS |
5240 | } |
5241 | ||
5242 | return rc; | |
5243 | } | |
6fc05c25 | 5244 | |
730928c8 RS |
5245 | void |
5246 | smb2_copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info *pfs_inf, | |
5247 | struct kstatfs *kst) | |
6fc05c25 PS |
5248 | { |
5249 | kst->f_bsize = le32_to_cpu(pfs_inf->BytesPerSector) * | |
5250 | le32_to_cpu(pfs_inf->SectorsPerAllocationUnit); | |
5251 | kst->f_blocks = le64_to_cpu(pfs_inf->TotalAllocationUnits); | |
42bec214 SP |
5252 | kst->f_bfree = kst->f_bavail = |
5253 | le64_to_cpu(pfs_inf->CallerAvailableAllocationUnits); | |
6fc05c25 PS |
5254 | return; |
5255 | } | |
5256 | ||
2d304217 SF |
5257 | static void |
5258 | copy_posix_fs_info_to_kstatfs(FILE_SYSTEM_POSIX_INFO *response_data, | |
5259 | struct kstatfs *kst) | |
5260 | { | |
5261 | kst->f_bsize = le32_to_cpu(response_data->BlockSize); | |
5262 | kst->f_blocks = le64_to_cpu(response_data->TotalBlocks); | |
5263 | kst->f_bfree = le64_to_cpu(response_data->BlocksAvail); | |
5264 | if (response_data->UserBlocksAvail == cpu_to_le64(-1)) | |
5265 | kst->f_bavail = kst->f_bfree; | |
5266 | else | |
5267 | kst->f_bavail = le64_to_cpu(response_data->UserBlocksAvail); | |
5268 | if (response_data->TotalFileNodes != cpu_to_le64(-1)) | |
5269 | kst->f_files = le64_to_cpu(response_data->TotalFileNodes); | |
5270 | if (response_data->FreeFileNodes != cpu_to_le64(-1)) | |
5271 | kst->f_ffree = le64_to_cpu(response_data->FreeFileNodes); | |
5272 | ||
5273 | return; | |
5274 | } | |
2d304217 | 5275 | |
6fc05c25 | 5276 | static int |
352d96f3 AA |
5277 | build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon, |
5278 | struct TCP_Server_Info *server, | |
5279 | int level, int outbuf_len, u64 persistent_fid, | |
5280 | u64 volatile_fid) | |
6fc05c25 PS |
5281 | { |
5282 | int rc; | |
5283 | struct smb2_query_info_req *req; | |
b2fb7fec | 5284 | unsigned int total_len; |
6fc05c25 | 5285 | |
f96637be | 5286 | cifs_dbg(FYI, "Query FSInfo level %d\n", level); |
6fc05c25 | 5287 | |
352d96f3 | 5288 | if ((tcon->ses == NULL) || server == NULL) |
6fc05c25 PS |
5289 | return -EIO; |
5290 | ||
352d96f3 AA |
5291 | rc = smb2_plain_req_init(SMB2_QUERY_INFO, tcon, server, |
5292 | (void **) &req, &total_len); | |
6fc05c25 PS |
5293 | if (rc) |
5294 | return rc; | |
5295 | ||
5296 | req->InfoType = SMB2_O_INFO_FILESYSTEM; | |
5297 | req->FileInfoClass = level; | |
5298 | req->PersistentFileId = persistent_fid; | |
5299 | req->VolatileFileId = volatile_fid; | |
b2fb7fec | 5300 | /* 1 for pad */ |
6fc05c25 | 5301 | req->InputBufferOffset = |
b2fb7fec | 5302 | cpu_to_le16(sizeof(struct smb2_query_info_req) - 1); |
6fc05c25 | 5303 | req->OutputBufferLength = cpu_to_le32( |
1fc6ad2f | 5304 | outbuf_len + sizeof(struct smb2_query_info_rsp) - 1); |
6fc05c25 PS |
5305 | |
5306 | iov->iov_base = (char *)req; | |
b2fb7fec | 5307 | iov->iov_len = total_len; |
6fc05c25 PS |
5308 | return 0; |
5309 | } | |
5310 | ||
2d304217 SF |
5311 | int |
5312 | SMB311_posix_qfs_info(const unsigned int xid, struct cifs_tcon *tcon, | |
5313 | u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata) | |
5314 | { | |
5315 | struct smb_rqst rqst; | |
5316 | struct smb2_query_info_rsp *rsp = NULL; | |
5317 | struct kvec iov; | |
5318 | struct kvec rsp_iov; | |
5319 | int rc = 0; | |
5320 | int resp_buftype; | |
5321 | struct cifs_ses *ses = tcon->ses; | |
352d96f3 | 5322 | struct TCP_Server_Info *server = cifs_pick_channel(ses); |
2d304217 SF |
5323 | FILE_SYSTEM_POSIX_INFO *info = NULL; |
5324 | int flags = 0; | |
5325 | ||
352d96f3 AA |
5326 | rc = build_qfs_info_req(&iov, tcon, server, |
5327 | FS_POSIX_INFORMATION, | |
2d304217 SF |
5328 | sizeof(FILE_SYSTEM_POSIX_INFO), |
5329 | persistent_fid, volatile_fid); | |
5330 | if (rc) | |
5331 | return rc; | |
5332 | ||
5333 | if (smb3_encryption_required(tcon)) | |
5334 | flags |= CIFS_TRANSFORM_REQ; | |
5335 | ||
5336 | memset(&rqst, 0, sizeof(struct smb_rqst)); | |
5337 | rqst.rq_iov = &iov; | |
5338 | rqst.rq_nvec = 1; | |
5339 | ||
352d96f3 AA |
5340 | rc = cifs_send_recv(xid, ses, server, |
5341 | &rqst, &resp_buftype, flags, &rsp_iov); | |
2d304217 SF |
5342 | cifs_small_buf_release(iov.iov_base); |
5343 | if (rc) { | |
5344 | cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE); | |
5345 | goto posix_qfsinf_exit; | |
5346 | } | |
5347 | rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; | |
5348 | ||
5349 | info = (FILE_SYSTEM_POSIX_INFO *)( | |
5350 | le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp); | |
730928c8 RS |
5351 | rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset), |
5352 | le32_to_cpu(rsp->OutputBufferLength), &rsp_iov, | |
5353 | sizeof(FILE_SYSTEM_POSIX_INFO)); | |
2d304217 SF |
5354 | if (!rc) |
5355 | copy_posix_fs_info_to_kstatfs(info, fsdata); | |
5356 | ||
5357 | posix_qfsinf_exit: | |
5358 | free_rsp_buf(resp_buftype, rsp_iov.iov_base); | |
5359 | return rc; | |
5360 | } | |
2d304217 | 5361 | |
6fc05c25 PS |
5362 | int |
5363 | SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon, | |
5364 | u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata) | |
5365 | { | |
40eff45b | 5366 | struct smb_rqst rqst; |
6fc05c25 PS |
5367 | struct smb2_query_info_rsp *rsp = NULL; |
5368 | struct kvec iov; | |
da502f7d | 5369 | struct kvec rsp_iov; |
6fc05c25 PS |
5370 | int rc = 0; |
5371 | int resp_buftype; | |
5372 | struct cifs_ses *ses = tcon->ses; | |
352d96f3 | 5373 | struct TCP_Server_Info *server = cifs_pick_channel(ses); |
6fc05c25 | 5374 | struct smb2_fs_full_size_info *info = NULL; |
7fb8986e | 5375 | int flags = 0; |
6fc05c25 | 5376 | |
352d96f3 AA |
5377 | rc = build_qfs_info_req(&iov, tcon, server, |
5378 | FS_FULL_SIZE_INFORMATION, | |
6fc05c25 PS |
5379 | sizeof(struct smb2_fs_full_size_info), |
5380 | persistent_fid, volatile_fid); | |
5381 | if (rc) | |
5382 | return rc; | |
5383 | ||
5a77e75f | 5384 | if (smb3_encryption_required(tcon)) |
7fb8986e PS |
5385 | flags |= CIFS_TRANSFORM_REQ; |
5386 | ||
40eff45b RS |
5387 | memset(&rqst, 0, sizeof(struct smb_rqst)); |
5388 | rqst.rq_iov = &iov; | |
5389 | rqst.rq_nvec = 1; | |
5390 | ||
352d96f3 AA |
5391 | rc = cifs_send_recv(xid, ses, server, |
5392 | &rqst, &resp_buftype, flags, &rsp_iov); | |
da502f7d | 5393 | cifs_small_buf_release(iov.iov_base); |
6fc05c25 PS |
5394 | if (rc) { |
5395 | cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE); | |
34f62640 | 5396 | goto qfsinf_exit; |
6fc05c25 | 5397 | } |
da502f7d | 5398 | rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; |
6fc05c25 | 5399 | |
1fc6ad2f | 5400 | info = (struct smb2_fs_full_size_info *)( |
49f466bd | 5401 | le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp); |
730928c8 RS |
5402 | rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset), |
5403 | le32_to_cpu(rsp->OutputBufferLength), &rsp_iov, | |
5404 | sizeof(struct smb2_fs_full_size_info)); | |
6fc05c25 | 5405 | if (!rc) |
730928c8 | 5406 | smb2_copy_fs_info_to_kstatfs(info, fsdata); |
6fc05c25 | 5407 | |
34f62640 | 5408 | qfsinf_exit: |
da502f7d | 5409 | free_rsp_buf(resp_buftype, rsp_iov.iov_base); |
34f62640 SF |
5410 | return rc; |
5411 | } | |
5412 | ||
5413 | int | |
5414 | SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon, | |
2167114c | 5415 | u64 persistent_fid, u64 volatile_fid, int level) |
34f62640 | 5416 | { |
40eff45b | 5417 | struct smb_rqst rqst; |
34f62640 SF |
5418 | struct smb2_query_info_rsp *rsp = NULL; |
5419 | struct kvec iov; | |
da502f7d | 5420 | struct kvec rsp_iov; |
34f62640 | 5421 | int rc = 0; |
2167114c | 5422 | int resp_buftype, max_len, min_len; |
34f62640 | 5423 | struct cifs_ses *ses = tcon->ses; |
352d96f3 | 5424 | struct TCP_Server_Info *server = cifs_pick_channel(ses); |
34f62640 | 5425 | unsigned int rsp_len, offset; |
7fb8986e | 5426 | int flags = 0; |
34f62640 | 5427 | |
2167114c SF |
5428 | if (level == FS_DEVICE_INFORMATION) { |
5429 | max_len = sizeof(FILE_SYSTEM_DEVICE_INFO); | |
5430 | min_len = sizeof(FILE_SYSTEM_DEVICE_INFO); | |
5431 | } else if (level == FS_ATTRIBUTE_INFORMATION) { | |
5432 | max_len = sizeof(FILE_SYSTEM_ATTRIBUTE_INFO); | |
5433 | min_len = MIN_FS_ATTR_INFO_SIZE; | |
af6a12ea SF |
5434 | } else if (level == FS_SECTOR_SIZE_INFORMATION) { |
5435 | max_len = sizeof(struct smb3_fs_ss_info); | |
5436 | min_len = sizeof(struct smb3_fs_ss_info); | |
21ba3845 SF |
5437 | } else if (level == FS_VOLUME_INFORMATION) { |
5438 | max_len = sizeof(struct smb3_fs_vol_info) + MAX_VOL_LABEL_LEN; | |
5439 | min_len = sizeof(struct smb3_fs_vol_info); | |
2167114c | 5440 | } else { |
af6a12ea | 5441 | cifs_dbg(FYI, "Invalid qfsinfo level %d\n", level); |
2167114c SF |
5442 | return -EINVAL; |
5443 | } | |
5444 | ||
352d96f3 AA |
5445 | rc = build_qfs_info_req(&iov, tcon, server, |
5446 | level, max_len, | |
34f62640 SF |
5447 | persistent_fid, volatile_fid); |
5448 | if (rc) | |
5449 | return rc; | |
5450 | ||
5a77e75f | 5451 | if (smb3_encryption_required(tcon)) |
7fb8986e PS |
5452 | flags |= CIFS_TRANSFORM_REQ; |
5453 | ||
40eff45b RS |
5454 | memset(&rqst, 0, sizeof(struct smb_rqst)); |
5455 | rqst.rq_iov = &iov; | |
5456 | rqst.rq_nvec = 1; | |
5457 | ||
352d96f3 AA |
5458 | rc = cifs_send_recv(xid, ses, server, |
5459 | &rqst, &resp_buftype, flags, &rsp_iov); | |
da502f7d | 5460 | cifs_small_buf_release(iov.iov_base); |
34f62640 SF |
5461 | if (rc) { |
5462 | cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE); | |
5463 | goto qfsattr_exit; | |
5464 | } | |
da502f7d | 5465 | rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; |
34f62640 SF |
5466 | |
5467 | rsp_len = le32_to_cpu(rsp->OutputBufferLength); | |
5468 | offset = le16_to_cpu(rsp->OutputBufferOffset); | |
730928c8 | 5469 | rc = smb2_validate_iov(offset, rsp_len, &rsp_iov, min_len); |
2167114c SF |
5470 | if (rc) |
5471 | goto qfsattr_exit; | |
5472 | ||
5473 | if (level == FS_ATTRIBUTE_INFORMATION) | |
1fc6ad2f | 5474 | memcpy(&tcon->fsAttrInfo, offset |
49f466bd | 5475 | + (char *)rsp, min_t(unsigned int, |
2167114c SF |
5476 | rsp_len, max_len)); |
5477 | else if (level == FS_DEVICE_INFORMATION) | |
1fc6ad2f | 5478 | memcpy(&tcon->fsDevInfo, offset |
49f466bd | 5479 | + (char *)rsp, sizeof(FILE_SYSTEM_DEVICE_INFO)); |
af6a12ea SF |
5480 | else if (level == FS_SECTOR_SIZE_INFORMATION) { |
5481 | struct smb3_fs_ss_info *ss_info = (struct smb3_fs_ss_info *) | |
1fc6ad2f | 5482 | (offset + (char *)rsp); |
af6a12ea SF |
5483 | tcon->ss_flags = le32_to_cpu(ss_info->Flags); |
5484 | tcon->perf_sector_size = | |
5485 | le32_to_cpu(ss_info->PhysicalBytesPerSectorForPerf); | |
21ba3845 SF |
5486 | } else if (level == FS_VOLUME_INFORMATION) { |
5487 | struct smb3_fs_vol_info *vol_info = (struct smb3_fs_vol_info *) | |
5488 | (offset + (char *)rsp); | |
5489 | tcon->vol_serial_number = vol_info->VolumeSerialNumber; | |
5490 | tcon->vol_create_time = vol_info->VolumeCreationTime; | |
af6a12ea | 5491 | } |
34f62640 SF |
5492 | |
5493 | qfsattr_exit: | |
da502f7d | 5494 | free_rsp_buf(resp_buftype, rsp_iov.iov_base); |
6fc05c25 PS |
5495 | return rc; |
5496 | } | |
f7ba7fe6 PS |
5497 | |
5498 | int | |
5499 | smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon, | |
5500 | const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid, | |
5501 | const __u32 num_lock, struct smb2_lock_element *buf) | |
5502 | { | |
40eff45b | 5503 | struct smb_rqst rqst; |
f7ba7fe6 PS |
5504 | int rc = 0; |
5505 | struct smb2_lock_req *req = NULL; | |
5506 | struct kvec iov[2]; | |
da502f7d | 5507 | struct kvec rsp_iov; |
f7ba7fe6 PS |
5508 | int resp_buf_type; |
5509 | unsigned int count; | |
392e1c5d | 5510 | int flags = CIFS_NO_RSP_BUF; |
ced93679 | 5511 | unsigned int total_len; |
352d96f3 | 5512 | struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses); |
f7ba7fe6 | 5513 | |
f96637be | 5514 | cifs_dbg(FYI, "smb2_lockv num lock %d\n", num_lock); |
f7ba7fe6 | 5515 | |
352d96f3 AA |
5516 | rc = smb2_plain_req_init(SMB2_LOCK, tcon, server, |
5517 | (void **) &req, &total_len); | |
f7ba7fe6 PS |
5518 | if (rc) |
5519 | return rc; | |
5520 | ||
5a77e75f | 5521 | if (smb3_encryption_required(tcon)) |
7fb8986e PS |
5522 | flags |= CIFS_TRANSFORM_REQ; |
5523 | ||
0d35e382 | 5524 | req->hdr.Id.SyncId.ProcessId = cpu_to_le32(pid); |
f7ba7fe6 PS |
5525 | req->LockCount = cpu_to_le16(num_lock); |
5526 | ||
5527 | req->PersistentFileId = persist_fid; | |
5528 | req->VolatileFileId = volatile_fid; | |
5529 | ||
5530 | count = num_lock * sizeof(struct smb2_lock_element); | |
f7ba7fe6 PS |
5531 | |
5532 | iov[0].iov_base = (char *)req; | |
ced93679 | 5533 | iov[0].iov_len = total_len - sizeof(struct smb2_lock_element); |
f7ba7fe6 PS |
5534 | iov[1].iov_base = (char *)buf; |
5535 | iov[1].iov_len = count; | |
5536 | ||
5537 | cifs_stats_inc(&tcon->stats.cifs_stats.num_locks); | |
40eff45b RS |
5538 | |
5539 | memset(&rqst, 0, sizeof(struct smb_rqst)); | |
5540 | rqst.rq_iov = iov; | |
5541 | rqst.rq_nvec = 2; | |
5542 | ||
352d96f3 AA |
5543 | rc = cifs_send_recv(xid, tcon->ses, server, |
5544 | &rqst, &resp_buf_type, flags, | |
ced93679 | 5545 | &rsp_iov); |
da502f7d | 5546 | cifs_small_buf_release(req); |
f7ba7fe6 | 5547 | if (rc) { |
f96637be | 5548 | cifs_dbg(FYI, "Send error in smb2_lockv = %d\n", rc); |
f7ba7fe6 | 5549 | cifs_stats_fail_inc(tcon, SMB2_LOCK_HE); |
eccb4422 SF |
5550 | trace_smb3_lock_err(xid, persist_fid, tcon->tid, |
5551 | tcon->ses->Suid, rc); | |
f7ba7fe6 PS |
5552 | } |
5553 | ||
5554 | return rc; | |
5555 | } | |
5556 | ||
5557 | int | |
5558 | SMB2_lock(const unsigned int xid, struct cifs_tcon *tcon, | |
5559 | const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid, | |
5560 | const __u64 length, const __u64 offset, const __u32 lock_flags, | |
5561 | const bool wait) | |
5562 | { | |
5563 | struct smb2_lock_element lock; | |
5564 | ||
5565 | lock.Offset = cpu_to_le64(offset); | |
5566 | lock.Length = cpu_to_le64(length); | |
5567 | lock.Flags = cpu_to_le32(lock_flags); | |
5568 | if (!wait && lock_flags != SMB2_LOCKFLAG_UNLOCK) | |
5569 | lock.Flags |= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY); | |
5570 | ||
5571 | return smb2_lockv(xid, tcon, persist_fid, volatile_fid, pid, 1, &lock); | |
5572 | } | |
0822f514 PS |
5573 | |
5574 | int | |
5575 | SMB2_lease_break(const unsigned int xid, struct cifs_tcon *tcon, | |
5576 | __u8 *lease_key, const __le32 lease_state) | |
5577 | { | |
40eff45b | 5578 | struct smb_rqst rqst; |
0822f514 PS |
5579 | int rc; |
5580 | struct smb2_lease_ack *req = NULL; | |
8eb7998e | 5581 | struct cifs_ses *ses = tcon->ses; |
7fb8986e | 5582 | int flags = CIFS_OBREAK_OP; |
8eb7998e RS |
5583 | unsigned int total_len; |
5584 | struct kvec iov[1]; | |
5585 | struct kvec rsp_iov; | |
5586 | int resp_buf_type; | |
179e44d4 SF |
5587 | __u64 *please_key_high; |
5588 | __u64 *please_key_low; | |
352d96f3 | 5589 | struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses); |
0822f514 | 5590 | |
f96637be | 5591 | cifs_dbg(FYI, "SMB2_lease_break\n"); |
352d96f3 AA |
5592 | rc = smb2_plain_req_init(SMB2_OPLOCK_BREAK, tcon, server, |
5593 | (void **) &req, &total_len); | |
0822f514 PS |
5594 | if (rc) |
5595 | return rc; | |
5596 | ||
5a77e75f | 5597 | if (smb3_encryption_required(tcon)) |
7fb8986e PS |
5598 | flags |= CIFS_TRANSFORM_REQ; |
5599 | ||
0d35e382 | 5600 | req->hdr.CreditRequest = cpu_to_le16(1); |
0822f514 | 5601 | req->StructureSize = cpu_to_le16(36); |
8eb7998e | 5602 | total_len += 12; |
0822f514 PS |
5603 | |
5604 | memcpy(req->LeaseKey, lease_key, 16); | |
5605 | req->LeaseState = lease_state; | |
5606 | ||
392e1c5d | 5607 | flags |= CIFS_NO_RSP_BUF; |
8eb7998e RS |
5608 | |
5609 | iov[0].iov_base = (char *)req; | |
5610 | iov[0].iov_len = total_len; | |
5611 | ||
40eff45b RS |
5612 | memset(&rqst, 0, sizeof(struct smb_rqst)); |
5613 | rqst.rq_iov = iov; | |
5614 | rqst.rq_nvec = 1; | |
5615 | ||
352d96f3 AA |
5616 | rc = cifs_send_recv(xid, ses, server, |
5617 | &rqst, &resp_buf_type, flags, &rsp_iov); | |
da502f7d | 5618 | cifs_small_buf_release(req); |
0822f514 | 5619 | |
d339adc1 AA |
5620 | please_key_low = (__u64 *)lease_key; |
5621 | please_key_high = (__u64 *)(lease_key+8); | |
0822f514 PS |
5622 | if (rc) { |
5623 | cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE); | |
179e44d4 SF |
5624 | trace_smb3_lease_err(le32_to_cpu(lease_state), tcon->tid, |
5625 | ses->Suid, *please_key_low, *please_key_high, rc); | |
f96637be | 5626 | cifs_dbg(FYI, "Send error in Lease Break = %d\n", rc); |
179e44d4 SF |
5627 | } else |
5628 | trace_smb3_lease_done(le32_to_cpu(lease_state), tcon->tid, | |
5629 | ses->Suid, *please_key_low, *please_key_high); | |
0822f514 PS |
5630 | |
5631 | return rc; | |
5632 | } |