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