Commit | Line | Data |
---|---|---|
ec2e4523 PS |
1 | /* |
2 | * fs/cifs/smb2pdu.c | |
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 | * | |
11 | * This library is free software; you can redistribute it and/or modify | |
12 | * it under the terms of the GNU Lesser General Public License as published | |
13 | * by the Free Software Foundation; either version 2.1 of the License, or | |
14 | * (at your option) any later version. | |
15 | * | |
16 | * This library is distributed in the hope that it will be useful, | |
17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See | |
19 | * the GNU Lesser General Public License for more details. | |
20 | * | |
21 | * You should have received a copy of the GNU Lesser General Public License | |
22 | * along with this library; if not, write to the Free Software | |
23 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
24 | */ | |
25 | ||
26 | /* SMB2 PDU handling routines here - except for leftovers (eg session setup) */ | |
27 | /* Note that there are handle based routines which must be */ | |
28 | /* treated slightly differently for reconnection purposes since we never */ | |
29 | /* want to reuse a stale file handle and only the caller knows the file info */ | |
30 | ||
31 | #include <linux/fs.h> | |
32 | #include <linux/kernel.h> | |
33 | #include <linux/vfs.h> | |
09a4707e | 34 | #include <linux/task_io_accounting_ops.h> |
ec2e4523 | 35 | #include <linux/uaccess.h> |
c6e970a0 | 36 | #include <linux/uuid.h> |
33319141 | 37 | #include <linux/pagemap.h> |
ec2e4523 PS |
38 | #include <linux/xattr.h> |
39 | #include "smb2pdu.h" | |
40 | #include "cifsglob.h" | |
41 | #include "cifsacl.h" | |
42 | #include "cifsproto.h" | |
43 | #include "smb2proto.h" | |
44 | #include "cifs_unicode.h" | |
45 | #include "cifs_debug.h" | |
46 | #include "ntlmssp.h" | |
47 | #include "smb2status.h" | |
09a4707e | 48 | #include "smb2glob.h" |
d324f08d | 49 | #include "cifspdu.h" |
ceb1b0b9 | 50 | #include "cifs_spnego.h" |
db223a59 | 51 | #include "smbdirect.h" |
ec2e4523 PS |
52 | |
53 | /* | |
54 | * The following table defines the expected "StructureSize" of SMB2 requests | |
55 | * in order by SMB2 command. This is similar to "wct" in SMB/CIFS requests. | |
56 | * | |
57 | * Note that commands are defined in smb2pdu.h in le16 but the array below is | |
58 | * indexed by command in host byte order. | |
59 | */ | |
60 | static const int smb2_req_struct_sizes[NUMBER_OF_SMB2_COMMANDS] = { | |
61 | /* SMB2_NEGOTIATE */ 36, | |
62 | /* SMB2_SESSION_SETUP */ 25, | |
63 | /* SMB2_LOGOFF */ 4, | |
64 | /* SMB2_TREE_CONNECT */ 9, | |
65 | /* SMB2_TREE_DISCONNECT */ 4, | |
66 | /* SMB2_CREATE */ 57, | |
67 | /* SMB2_CLOSE */ 24, | |
68 | /* SMB2_FLUSH */ 24, | |
69 | /* SMB2_READ */ 49, | |
70 | /* SMB2_WRITE */ 49, | |
71 | /* SMB2_LOCK */ 48, | |
72 | /* SMB2_IOCTL */ 57, | |
73 | /* SMB2_CANCEL */ 4, | |
74 | /* SMB2_ECHO */ 4, | |
75 | /* SMB2_QUERY_DIRECTORY */ 33, | |
76 | /* SMB2_CHANGE_NOTIFY */ 32, | |
77 | /* SMB2_QUERY_INFO */ 41, | |
78 | /* SMB2_SET_INFO */ 33, | |
79 | /* SMB2_OPLOCK_BREAK */ 24 /* BB this is 36 for LEASE_BREAK variant */ | |
80 | }; | |
81 | ||
7fb8986e PS |
82 | static int encryption_required(const struct cifs_tcon *tcon) |
83 | { | |
ae6f8dd4 PS |
84 | if (!tcon) |
85 | return 0; | |
7fb8986e PS |
86 | if ((tcon->ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) || |
87 | (tcon->share_flags & SHI1005_FLAGS_ENCRYPT_DATA)) | |
88 | return 1; | |
ae6f8dd4 PS |
89 | if (tcon->seal && |
90 | (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION)) | |
91 | return 1; | |
7fb8986e PS |
92 | return 0; |
93 | } | |
ec2e4523 PS |
94 | |
95 | static void | |
cb200bd6 | 96 | smb2_hdr_assemble(struct smb2_sync_hdr *shdr, __le16 smb2_cmd, |
ec2e4523 PS |
97 | const struct cifs_tcon *tcon) |
98 | { | |
31473fc4 PS |
99 | shdr->ProtocolId = SMB2_PROTO_NUMBER; |
100 | shdr->StructureSize = cpu_to_le16(64); | |
101 | shdr->Command = smb2_cmd; | |
7d414f39 RL |
102 | if (tcon && tcon->ses && tcon->ses->server) { |
103 | struct TCP_Server_Info *server = tcon->ses->server; | |
104 | ||
105 | spin_lock(&server->req_lock); | |
106 | /* Request up to 2 credits but don't go over the limit. */ | |
141891f4 | 107 | if (server->credits >= server->max_credits) |
31473fc4 | 108 | shdr->CreditRequest = cpu_to_le16(0); |
7d414f39 | 109 | else |
31473fc4 | 110 | shdr->CreditRequest = cpu_to_le16( |
141891f4 | 111 | min_t(int, server->max_credits - |
7d414f39 RL |
112 | server->credits, 2)); |
113 | spin_unlock(&server->req_lock); | |
114 | } else { | |
31473fc4 | 115 | shdr->CreditRequest = cpu_to_le16(2); |
7d414f39 | 116 | } |
31473fc4 | 117 | shdr->ProcessId = cpu_to_le32((__u16)current->tgid); |
ec2e4523 PS |
118 | |
119 | if (!tcon) | |
120 | goto out; | |
121 | ||
2b80d049 SF |
122 | /* GLOBAL_CAP_LARGE_MTU will only be set if dialect > SMB2.02 */ |
123 | /* See sections 2.2.4 and 3.2.4.1.5 of MS-SMB2 */ | |
1dc92c45 | 124 | if ((tcon->ses) && (tcon->ses->server) && |
84ceeb96 | 125 | (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) |
31473fc4 | 126 | shdr->CreditCharge = cpu_to_le16(1); |
2b80d049 SF |
127 | /* else CreditCharge MBZ */ |
128 | ||
31473fc4 | 129 | shdr->TreeId = tcon->tid; |
ec2e4523 PS |
130 | /* Uid is not converted */ |
131 | if (tcon->ses) | |
31473fc4 | 132 | shdr->SessionId = tcon->ses->Suid; |
f87ab88b SF |
133 | |
134 | /* | |
135 | * If we would set SMB2_FLAGS_DFS_OPERATIONS on open we also would have | |
136 | * to pass the path on the Open SMB prefixed by \\server\share. | |
137 | * Not sure when we would need to do the augmented path (if ever) and | |
138 | * setting this flag breaks the SMB2 open operation since it is | |
139 | * illegal to send an empty path name (without \\server\share prefix) | |
140 | * when the DFS flag is set in the SMB open header. We could | |
141 | * consider setting the flag on all operations other than open | |
142 | * but it is safer to net set it for now. | |
143 | */ | |
144 | /* if (tcon->share_flags & SHI1005_FLAGS_DFS) | |
31473fc4 | 145 | shdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS; */ |
f87ab88b | 146 | |
7fb8986e PS |
147 | if (tcon->ses && tcon->ses->server && tcon->ses->server->sign && |
148 | !encryption_required(tcon)) | |
31473fc4 | 149 | shdr->Flags |= SMB2_FLAGS_SIGNED; |
ec2e4523 | 150 | out: |
ec2e4523 PS |
151 | return; |
152 | } | |
153 | ||
154 | static int | |
155 | smb2_reconnect(__le16 smb2_command, struct cifs_tcon *tcon) | |
156 | { | |
157 | int rc = 0; | |
aa24d1e9 PS |
158 | struct nls_table *nls_codepage; |
159 | struct cifs_ses *ses; | |
160 | struct TCP_Server_Info *server; | |
161 | ||
162 | /* | |
163 | * SMB2s NegProt, SessSetup, Logoff do not have tcon yet so | |
164 | * check for tcp and smb session status done differently | |
165 | * for those three - in the calling routine. | |
166 | */ | |
167 | if (tcon == NULL) | |
168 | return rc; | |
169 | ||
170 | if (smb2_command == SMB2_TREE_CONNECT) | |
171 | return rc; | |
172 | ||
173 | if (tcon->tidStatus == CifsExiting) { | |
174 | /* | |
175 | * only tree disconnect, open, and write, | |
176 | * (and ulogoff which does not have tcon) | |
177 | * are allowed as we start force umount. | |
178 | */ | |
179 | if ((smb2_command != SMB2_WRITE) && | |
180 | (smb2_command != SMB2_CREATE) && | |
181 | (smb2_command != SMB2_TREE_DISCONNECT)) { | |
f96637be JP |
182 | cifs_dbg(FYI, "can not send cmd %d while umounting\n", |
183 | smb2_command); | |
aa24d1e9 PS |
184 | return -ENODEV; |
185 | } | |
186 | } | |
187 | if ((!tcon->ses) || (tcon->ses->status == CifsExiting) || | |
188 | (!tcon->ses->server)) | |
189 | return -EIO; | |
190 | ||
191 | ses = tcon->ses; | |
192 | server = ses->server; | |
193 | ||
194 | /* | |
195 | * Give demultiplex thread up to 10 seconds to reconnect, should be | |
196 | * greater than cifs socket timeout which is 7 seconds | |
197 | */ | |
198 | while (server->tcpStatus == CifsNeedReconnect) { | |
199 | /* | |
200 | * Return to caller for TREE_DISCONNECT and LOGOFF and CLOSE | |
201 | * here since they are implicitly done when session drops. | |
202 | */ | |
203 | switch (smb2_command) { | |
204 | /* | |
205 | * BB Should we keep oplock break and add flush to exceptions? | |
206 | */ | |
207 | case SMB2_TREE_DISCONNECT: | |
208 | case SMB2_CANCEL: | |
209 | case SMB2_CLOSE: | |
210 | case SMB2_OPLOCK_BREAK: | |
211 | return -EAGAIN; | |
212 | } | |
213 | ||
214 | wait_event_interruptible_timeout(server->response_q, | |
215 | (server->tcpStatus != CifsNeedReconnect), 10 * HZ); | |
216 | ||
217 | /* are we still trying to reconnect? */ | |
218 | if (server->tcpStatus != CifsNeedReconnect) | |
219 | break; | |
220 | ||
221 | /* | |
222 | * on "soft" mounts we wait once. Hard mounts keep | |
223 | * retrying until process is killed or server comes | |
224 | * back on-line | |
225 | */ | |
226 | if (!tcon->retry) { | |
f96637be | 227 | cifs_dbg(FYI, "gave up waiting on reconnect in smb_init\n"); |
aa24d1e9 PS |
228 | return -EHOSTDOWN; |
229 | } | |
230 | } | |
231 | ||
232 | if (!tcon->ses->need_reconnect && !tcon->need_reconnect) | |
233 | return rc; | |
234 | ||
235 | nls_codepage = load_nls_default(); | |
236 | ||
237 | /* | |
238 | * need to prevent multiple threads trying to simultaneously reconnect | |
239 | * the same SMB session | |
240 | */ | |
241 | mutex_lock(&tcon->ses->session_mutex); | |
76e75270 SC |
242 | |
243 | /* | |
244 | * Recheck after acquire mutex. If another thread is negotiating | |
245 | * and the server never sends an answer the socket will be closed | |
246 | * and tcpStatus set to reconnect. | |
247 | */ | |
248 | if (server->tcpStatus == CifsNeedReconnect) { | |
249 | rc = -EHOSTDOWN; | |
250 | mutex_unlock(&tcon->ses->session_mutex); | |
251 | goto out; | |
252 | } | |
253 | ||
aa24d1e9 PS |
254 | rc = cifs_negotiate_protocol(0, tcon->ses); |
255 | if (!rc && tcon->ses->need_reconnect) | |
256 | rc = cifs_setup_session(0, tcon->ses, nls_codepage); | |
257 | ||
258 | if (rc || !tcon->need_reconnect) { | |
259 | mutex_unlock(&tcon->ses->session_mutex); | |
260 | goto out; | |
261 | } | |
262 | ||
263 | cifs_mark_open_files_invalid(tcon); | |
96a988ff PS |
264 | if (tcon->use_persistent) |
265 | tcon->need_reopen_files = true; | |
52ace1ef | 266 | |
aa24d1e9 PS |
267 | rc = SMB2_tcon(0, tcon->ses, tcon->treeName, tcon, nls_codepage); |
268 | mutex_unlock(&tcon->ses->session_mutex); | |
52ace1ef | 269 | |
f96637be | 270 | cifs_dbg(FYI, "reconnect tcon rc = %d\n", rc); |
c318e6c2 SF |
271 | if (rc) { |
272 | /* If sess reconnected but tcon didn't, something strange ... */ | |
273 | printk_once(KERN_WARNING "reconnect tcon failed rc = %d\n", rc); | |
aa24d1e9 | 274 | goto out; |
c318e6c2 | 275 | } |
96a988ff PS |
276 | |
277 | if (smb2_command != SMB2_INTERNAL_CMD) | |
278 | queue_delayed_work(cifsiod_wq, &server->reconnect, 0); | |
279 | ||
aa24d1e9 | 280 | atomic_inc(&tconInfoReconnectCount); |
aa24d1e9 PS |
281 | out: |
282 | /* | |
283 | * Check if handle based operation so we know whether we can continue | |
284 | * or not without returning to caller to reset file handle. | |
285 | */ | |
286 | /* | |
287 | * BB Is flush done by server on drop of tcp session? Should we special | |
288 | * case it and skip above? | |
289 | */ | |
290 | switch (smb2_command) { | |
291 | case SMB2_FLUSH: | |
292 | case SMB2_READ: | |
293 | case SMB2_WRITE: | |
294 | case SMB2_LOCK: | |
295 | case SMB2_IOCTL: | |
296 | case SMB2_QUERY_DIRECTORY: | |
297 | case SMB2_CHANGE_NOTIFY: | |
298 | case SMB2_QUERY_INFO: | |
299 | case SMB2_SET_INFO: | |
4772c795 | 300 | rc = -EAGAIN; |
aa24d1e9 PS |
301 | } |
302 | unload_nls(nls_codepage); | |
ec2e4523 PS |
303 | return rc; |
304 | } | |
305 | ||
cb200bd6 PS |
306 | static void |
307 | fill_small_buf(__le16 smb2_command, struct cifs_tcon *tcon, void *buf, | |
308 | unsigned int *total_len) | |
309 | { | |
310 | struct smb2_sync_pdu *spdu = (struct smb2_sync_pdu *)buf; | |
311 | /* lookup word count ie StructureSize from table */ | |
312 | __u16 parmsize = smb2_req_struct_sizes[le16_to_cpu(smb2_command)]; | |
313 | ||
314 | /* | |
315 | * smaller than SMALL_BUFFER_SIZE but bigger than fixed area of | |
316 | * largest operations (Create) | |
317 | */ | |
318 | memset(buf, 0, 256); | |
319 | ||
320 | smb2_hdr_assemble(&spdu->sync_hdr, smb2_command, tcon); | |
321 | spdu->StructureSize2 = cpu_to_le16(parmsize); | |
322 | ||
323 | *total_len = parmsize + sizeof(struct smb2_sync_hdr); | |
324 | } | |
325 | ||
ec2e4523 PS |
326 | /* |
327 | * Allocate and return pointer to an SMB request hdr, and set basic | |
328 | * SMB information in the SMB header. If the return code is zero, this | |
305428ac | 329 | * function must have filled in request_buf pointer. |
ec2e4523 PS |
330 | */ |
331 | static int | |
305428ac RS |
332 | smb2_plain_req_init(__le16 smb2_command, struct cifs_tcon *tcon, |
333 | void **request_buf, unsigned int *total_len) | |
ec2e4523 | 334 | { |
cb200bd6 | 335 | int rc; |
ec2e4523 PS |
336 | |
337 | rc = smb2_reconnect(smb2_command, tcon); | |
338 | if (rc) | |
339 | return rc; | |
340 | ||
341 | /* BB eventually switch this to SMB2 specific small buf size */ | |
342 | *request_buf = cifs_small_buf_get(); | |
343 | if (*request_buf == NULL) { | |
344 | /* BB should we add a retry in here if not a writepage? */ | |
345 | return -ENOMEM; | |
346 | } | |
347 | ||
305428ac RS |
348 | fill_small_buf(smb2_command, tcon, |
349 | (struct smb2_sync_hdr *)(*request_buf), | |
350 | total_len); | |
ec2e4523 PS |
351 | |
352 | if (tcon != NULL) { | |
353 | #ifdef CONFIG_CIFS_STATS2 | |
ec2e4523 PS |
354 | uint16_t com_code = le16_to_cpu(smb2_command); |
355 | cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_sent[com_code]); | |
ec2e4523 PS |
356 | #endif |
357 | cifs_stats_inc(&tcon->num_smbs_sent); | |
358 | } | |
359 | ||
360 | return rc; | |
361 | } | |
362 | ||
ebb3a9d4 | 363 | #ifdef CONFIG_CIFS_SMB311 |
13cacea7 RS |
364 | /* offset is sizeof smb2_negotiate_req but rounded up to 8 bytes */ |
365 | #define OFFSET_OF_NEG_CONTEXT 0x68 /* sizeof(struct smb2_negotiate_req) */ | |
ebb3a9d4 SF |
366 | |
367 | ||
368 | #define SMB2_PREAUTH_INTEGRITY_CAPABILITIES cpu_to_le16(1) | |
369 | #define SMB2_ENCRYPTION_CAPABILITIES cpu_to_le16(2) | |
370 | ||
371 | static void | |
372 | build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt) | |
373 | { | |
374 | pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES; | |
375 | pneg_ctxt->DataLength = cpu_to_le16(38); | |
376 | pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1); | |
377 | pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE); | |
378 | get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE); | |
379 | pneg_ctxt->HashAlgorithms = SMB2_PREAUTH_INTEGRITY_SHA512; | |
380 | } | |
381 | ||
382 | static void | |
383 | build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt) | |
384 | { | |
385 | pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES; | |
386 | pneg_ctxt->DataLength = cpu_to_le16(6); | |
387 | pneg_ctxt->CipherCount = cpu_to_le16(2); | |
388 | pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES128_GCM; | |
389 | pneg_ctxt->Ciphers[1] = SMB2_ENCRYPTION_AES128_CCM; | |
390 | } | |
391 | ||
392 | static void | |
13cacea7 RS |
393 | assemble_neg_contexts(struct smb2_negotiate_req *req, |
394 | unsigned int *total_len) | |
ebb3a9d4 | 395 | { |
13cacea7 | 396 | char *pneg_ctxt = (char *)req + OFFSET_OF_NEG_CONTEXT; |
ebb3a9d4 SF |
397 | |
398 | build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt); | |
399 | /* Add 2 to size to round to 8 byte boundary */ | |
13cacea7 | 400 | |
ebb3a9d4 SF |
401 | pneg_ctxt += 2 + sizeof(struct smb2_preauth_neg_context); |
402 | build_encrypt_ctxt((struct smb2_encryption_neg_context *)pneg_ctxt); | |
403 | req->NegotiateContextOffset = cpu_to_le32(OFFSET_OF_NEG_CONTEXT); | |
404 | req->NegotiateContextCount = cpu_to_le16(2); | |
13cacea7 RS |
405 | |
406 | *total_len += 4 + sizeof(struct smb2_preauth_neg_context) | |
407 | + sizeof(struct smb2_encryption_neg_context); | |
ebb3a9d4 | 408 | } |
5100d8a3 SF |
409 | |
410 | static void decode_preauth_context(struct smb2_preauth_neg_context *ctxt) | |
411 | { | |
412 | unsigned int len = le16_to_cpu(ctxt->DataLength); | |
413 | ||
414 | /* If invalid preauth context warn but use what we requested, SHA-512 */ | |
415 | if (len < MIN_PREAUTH_CTXT_DATA_LEN) { | |
416 | printk_once(KERN_WARNING "server sent bad preauth context\n"); | |
417 | return; | |
418 | } | |
419 | if (le16_to_cpu(ctxt->HashAlgorithmCount) != 1) | |
420 | printk_once(KERN_WARNING "illegal SMB3 hash algorithm count\n"); | |
421 | if (ctxt->HashAlgorithms != SMB2_PREAUTH_INTEGRITY_SHA512) | |
422 | printk_once(KERN_WARNING "unknown SMB3 hash algorithm\n"); | |
423 | } | |
424 | ||
425 | static int decode_encrypt_ctx(struct TCP_Server_Info *server, | |
426 | struct smb2_encryption_neg_context *ctxt) | |
427 | { | |
428 | unsigned int len = le16_to_cpu(ctxt->DataLength); | |
429 | ||
430 | cifs_dbg(FYI, "decode SMB3.11 encryption neg context of len %d\n", len); | |
431 | if (len < MIN_ENCRYPT_CTXT_DATA_LEN) { | |
432 | printk_once(KERN_WARNING "server sent bad crypto ctxt len\n"); | |
433 | return -EINVAL; | |
434 | } | |
435 | ||
436 | if (le16_to_cpu(ctxt->CipherCount) != 1) { | |
437 | printk_once(KERN_WARNING "illegal SMB3.11 cipher count\n"); | |
438 | return -EINVAL; | |
439 | } | |
440 | cifs_dbg(FYI, "SMB311 cipher type:%d\n", le16_to_cpu(ctxt->Ciphers[0])); | |
441 | if ((ctxt->Ciphers[0] != SMB2_ENCRYPTION_AES128_CCM) && | |
442 | (ctxt->Ciphers[0] != SMB2_ENCRYPTION_AES128_GCM)) { | |
443 | printk_once(KERN_WARNING "invalid SMB3.11 cipher returned\n"); | |
444 | return -EINVAL; | |
445 | } | |
446 | server->cipher_type = ctxt->Ciphers[0]; | |
447 | return 0; | |
448 | } | |
449 | ||
450 | static int smb311_decode_neg_context(struct smb2_negotiate_rsp *rsp, | |
451 | struct TCP_Server_Info *server) | |
452 | { | |
453 | struct smb2_neg_context *pctx; | |
454 | unsigned int offset = le32_to_cpu(rsp->NegotiateContextOffset); | |
455 | unsigned int ctxt_cnt = le16_to_cpu(rsp->NegotiateContextCount); | |
456 | unsigned int len_of_smb = be32_to_cpu(rsp->hdr.smb2_buf_length); | |
457 | unsigned int len_of_ctxts, i; | |
458 | int rc = 0; | |
459 | ||
460 | cifs_dbg(FYI, "decoding %d negotiate contexts\n", ctxt_cnt); | |
461 | if (len_of_smb <= offset) { | |
462 | cifs_dbg(VFS, "Invalid response: negotiate context offset\n"); | |
463 | return -EINVAL; | |
464 | } | |
465 | ||
466 | len_of_ctxts = len_of_smb - offset; | |
467 | ||
468 | for (i = 0; i < ctxt_cnt; i++) { | |
469 | int clen; | |
470 | /* check that offset is not beyond end of SMB */ | |
471 | if (len_of_ctxts == 0) | |
472 | break; | |
473 | ||
474 | if (len_of_ctxts < sizeof(struct smb2_neg_context)) | |
475 | break; | |
476 | ||
0d4b46ba SF |
477 | pctx = (struct smb2_neg_context *)(offset + |
478 | server->vals->header_preamble_size + (char *)rsp); | |
5100d8a3 SF |
479 | clen = le16_to_cpu(pctx->DataLength); |
480 | if (clen > len_of_ctxts) | |
481 | break; | |
482 | ||
483 | if (pctx->ContextType == SMB2_PREAUTH_INTEGRITY_CAPABILITIES) | |
484 | decode_preauth_context( | |
485 | (struct smb2_preauth_neg_context *)pctx); | |
486 | else if (pctx->ContextType == SMB2_ENCRYPTION_CAPABILITIES) | |
487 | rc = decode_encrypt_ctx(server, | |
488 | (struct smb2_encryption_neg_context *)pctx); | |
489 | else | |
490 | cifs_dbg(VFS, "unknown negcontext of type %d ignored\n", | |
491 | le16_to_cpu(pctx->ContextType)); | |
492 | ||
493 | if (rc) | |
494 | break; | |
495 | /* offsets must be 8 byte aligned */ | |
496 | clen = (clen + 7) & ~0x7; | |
497 | offset += clen + sizeof(struct smb2_neg_context); | |
498 | len_of_ctxts -= clen; | |
499 | } | |
500 | return rc; | |
501 | } | |
502 | ||
ebb3a9d4 | 503 | #else |
13cacea7 RS |
504 | static void assemble_neg_contexts(struct smb2_negotiate_req *req, |
505 | unsigned int *total_len) | |
ebb3a9d4 SF |
506 | { |
507 | return; | |
508 | } | |
509 | #endif /* SMB311 */ | |
510 | ||
ec2e4523 PS |
511 | /* |
512 | * | |
513 | * SMB2 Worker functions follow: | |
514 | * | |
515 | * The general structure of the worker functions is: | |
516 | * 1) Call smb2_init (assembles SMB2 header) | |
517 | * 2) Initialize SMB2 command specific fields in fixed length area of SMB | |
518 | * 3) Call smb_sendrcv2 (sends request on socket and waits for response) | |
519 | * 4) Decode SMB2 command specific fields in the fixed length area | |
520 | * 5) Decode variable length data area (if any for this SMB2 command type) | |
521 | * 6) Call free smb buffer | |
522 | * 7) return | |
523 | * | |
524 | */ | |
525 | ||
526 | int | |
527 | SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses) | |
528 | { | |
529 | struct smb2_negotiate_req *req; | |
530 | struct smb2_negotiate_rsp *rsp; | |
531 | struct kvec iov[1]; | |
da502f7d | 532 | struct kvec rsp_iov; |
ec2e4523 PS |
533 | int rc = 0; |
534 | int resp_buftype; | |
3534b850 | 535 | struct TCP_Server_Info *server = ses->server; |
ec2e4523 PS |
536 | int blob_offset, blob_length; |
537 | char *security_blob; | |
538 | int flags = CIFS_NEG_OP; | |
13cacea7 | 539 | unsigned int total_len; |
ec2e4523 | 540 | |
f96637be | 541 | cifs_dbg(FYI, "Negotiate protocol\n"); |
ec2e4523 | 542 | |
3534b850 JL |
543 | if (!server) { |
544 | WARN(1, "%s: server is NULL!\n", __func__); | |
545 | return -EIO; | |
ec2e4523 PS |
546 | } |
547 | ||
13cacea7 | 548 | rc = smb2_plain_req_init(SMB2_NEGOTIATE, NULL, (void **) &req, &total_len); |
ec2e4523 PS |
549 | if (rc) |
550 | return rc; | |
551 | ||
13cacea7 | 552 | req->sync_hdr.SessionId = 0; |
8bd68c6e AA |
553 | #ifdef CONFIG_CIFS_SMB311 |
554 | memset(server->preauth_sha_hash, 0, SMB2_PREAUTH_HASH_SIZE); | |
555 | memset(ses->preauth_sha_hash, 0, SMB2_PREAUTH_HASH_SIZE); | |
556 | #endif | |
ec2e4523 | 557 | |
9764c02f SF |
558 | if (strcmp(ses->server->vals->version_string, |
559 | SMB3ANY_VERSION_STRING) == 0) { | |
560 | req->Dialects[0] = cpu_to_le16(SMB30_PROT_ID); | |
561 | req->Dialects[1] = cpu_to_le16(SMB302_PROT_ID); | |
562 | req->DialectCount = cpu_to_le16(2); | |
13cacea7 | 563 | total_len += 4; |
9764c02f SF |
564 | } else if (strcmp(ses->server->vals->version_string, |
565 | SMBDEFAULT_VERSION_STRING) == 0) { | |
566 | req->Dialects[0] = cpu_to_le16(SMB21_PROT_ID); | |
567 | req->Dialects[1] = cpu_to_le16(SMB30_PROT_ID); | |
568 | req->Dialects[2] = cpu_to_le16(SMB302_PROT_ID); | |
569 | req->DialectCount = cpu_to_le16(3); | |
13cacea7 | 570 | total_len += 6; |
9764c02f SF |
571 | } else { |
572 | /* otherwise send specific dialect */ | |
573 | req->Dialects[0] = cpu_to_le16(ses->server->vals->protocol_id); | |
574 | req->DialectCount = cpu_to_le16(1); | |
13cacea7 | 575 | total_len += 2; |
9764c02f | 576 | } |
ec2e4523 PS |
577 | |
578 | /* only one of SMB2 signing flags may be set in SMB2 request */ | |
38d77c50 | 579 | if (ses->sign) |
9cd2e62c | 580 | req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED); |
38d77c50 | 581 | else if (global_secflags & CIFSSEC_MAY_SIGN) |
9cd2e62c | 582 | req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED); |
38d77c50 JL |
583 | else |
584 | req->SecurityMode = 0; | |
ec2e4523 | 585 | |
e4aa25e7 | 586 | req->Capabilities = cpu_to_le32(ses->server->vals->req_capabilities); |
ec2e4523 | 587 | |
3c5f9be1 SF |
588 | /* ClientGUID must be zero for SMB2.02 dialect */ |
589 | if (ses->server->vals->protocol_id == SMB20_PROT_ID) | |
590 | memset(req->ClientGUID, 0, SMB2_CLIENT_GUID_SIZE); | |
ebb3a9d4 | 591 | else { |
3c5f9be1 SF |
592 | memcpy(req->ClientGUID, server->client_guid, |
593 | SMB2_CLIENT_GUID_SIZE); | |
ebb3a9d4 | 594 | if (ses->server->vals->protocol_id == SMB311_PROT_ID) |
13cacea7 | 595 | assemble_neg_contexts(req, &total_len); |
ebb3a9d4 | 596 | } |
ec2e4523 | 597 | iov[0].iov_base = (char *)req; |
13cacea7 | 598 | iov[0].iov_len = total_len; |
ec2e4523 | 599 | |
13cacea7 | 600 | rc = smb2_send_recv(xid, ses, iov, 1, &resp_buftype, flags, &rsp_iov); |
da502f7d PS |
601 | cifs_small_buf_release(req); |
602 | rsp = (struct smb2_negotiate_rsp *)rsp_iov.iov_base; | |
ec2e4523 PS |
603 | /* |
604 | * No tcon so can't do | |
605 | * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]); | |
606 | */ | |
7e682f76 SF |
607 | if (rc == -EOPNOTSUPP) { |
608 | cifs_dbg(VFS, "Dialect not supported by server. Consider " | |
9764c02f | 609 | "specifying vers=1.0 or vers=2.0 on mount for accessing" |
7e682f76 SF |
610 | " older servers\n"); |
611 | goto neg_exit; | |
612 | } else if (rc != 0) | |
ec2e4523 PS |
613 | goto neg_exit; |
614 | ||
9764c02f SF |
615 | if (strcmp(ses->server->vals->version_string, |
616 | SMB3ANY_VERSION_STRING) == 0) { | |
617 | if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) { | |
618 | cifs_dbg(VFS, | |
619 | "SMB2 dialect returned but not requested\n"); | |
620 | return -EIO; | |
621 | } else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) { | |
622 | cifs_dbg(VFS, | |
623 | "SMB2.1 dialect returned but not requested\n"); | |
624 | return -EIO; | |
625 | } | |
626 | } else if (strcmp(ses->server->vals->version_string, | |
627 | SMBDEFAULT_VERSION_STRING) == 0) { | |
628 | if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) { | |
629 | cifs_dbg(VFS, | |
630 | "SMB2 dialect returned but not requested\n"); | |
631 | return -EIO; | |
632 | } else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) { | |
633 | /* ops set to 3.0 by default for default so update */ | |
634 | ses->server->ops = &smb21_operations; | |
635 | } | |
590d08d3 SF |
636 | } else if (le16_to_cpu(rsp->DialectRevision) != |
637 | ses->server->vals->protocol_id) { | |
9764c02f SF |
638 | /* if requested single dialect ensure returned dialect matched */ |
639 | cifs_dbg(VFS, "Illegal 0x%x dialect returned: not requested\n", | |
590d08d3 | 640 | le16_to_cpu(rsp->DialectRevision)); |
9764c02f SF |
641 | return -EIO; |
642 | } | |
643 | ||
f96637be | 644 | cifs_dbg(FYI, "mode 0x%x\n", rsp->SecurityMode); |
ec2e4523 | 645 | |
e4aa25e7 | 646 | if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) |
f96637be | 647 | cifs_dbg(FYI, "negotiated smb2.0 dialect\n"); |
e4aa25e7 | 648 | else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) |
f96637be | 649 | cifs_dbg(FYI, "negotiated smb2.1 dialect\n"); |
e4aa25e7 | 650 | else if (rsp->DialectRevision == cpu_to_le16(SMB30_PROT_ID)) |
f96637be | 651 | cifs_dbg(FYI, "negotiated smb3.0 dialect\n"); |
20b6d8b4 SF |
652 | else if (rsp->DialectRevision == cpu_to_le16(SMB302_PROT_ID)) |
653 | cifs_dbg(FYI, "negotiated smb3.02 dialect\n"); | |
5f7fbf73 SF |
654 | #ifdef CONFIG_CIFS_SMB311 |
655 | else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID)) | |
656 | cifs_dbg(FYI, "negotiated smb3.1.1 dialect\n"); | |
657 | #endif /* SMB311 */ | |
ec2e4523 | 658 | else { |
f799d623 | 659 | cifs_dbg(VFS, "Illegal dialect returned by server 0x%x\n", |
f96637be | 660 | le16_to_cpu(rsp->DialectRevision)); |
ec2e4523 PS |
661 | rc = -EIO; |
662 | goto neg_exit; | |
663 | } | |
664 | server->dialect = le16_to_cpu(rsp->DialectRevision); | |
665 | ||
9764c02f SF |
666 | /* BB: add check that dialect was valid given dialect(s) we asked for */ |
667 | ||
8bd68c6e AA |
668 | #ifdef CONFIG_CIFS_SMB311 |
669 | /* | |
670 | * Keep a copy of the hash after negprot. This hash will be | |
671 | * the starting hash value for all sessions made from this | |
672 | * server. | |
673 | */ | |
674 | memcpy(server->preauth_sha_hash, ses->preauth_sha_hash, | |
675 | SMB2_PREAUTH_HASH_SIZE); | |
676 | #endif | |
e598d1d8 JL |
677 | /* SMB2 only has an extended negflavor */ |
678 | server->negflavor = CIFS_NEGFLAVOR_EXTENDED; | |
2365c4ea PS |
679 | /* set it to the maximum buffer size value we can send with 1 credit */ |
680 | server->maxBuf = min_t(unsigned int, le32_to_cpu(rsp->MaxTransactSize), | |
681 | SMB2_MAX_BUFFER_SIZE); | |
ec2e4523 PS |
682 | server->max_read = le32_to_cpu(rsp->MaxReadSize); |
683 | server->max_write = le32_to_cpu(rsp->MaxWriteSize); | |
ec2e4523 | 684 | server->sec_mode = le16_to_cpu(rsp->SecurityMode); |
07108d0e SF |
685 | if ((server->sec_mode & SMB2_SEC_MODE_FLAGS_ALL) != server->sec_mode) |
686 | cifs_dbg(FYI, "Server returned unexpected security mode 0x%x\n", | |
687 | server->sec_mode); | |
ec2e4523 | 688 | server->capabilities = le32_to_cpu(rsp->Capabilities); |
29e20f9c PS |
689 | /* Internal types */ |
690 | server->capabilities |= SMB2_NT_FIND | SMB2_LARGE_FILES; | |
ec2e4523 PS |
691 | |
692 | security_blob = smb2_get_data_area_len(&blob_offset, &blob_length, | |
693 | &rsp->hdr); | |
5d875cc9 SF |
694 | /* |
695 | * See MS-SMB2 section 2.2.4: if no blob, client picks default which | |
696 | * for us will be | |
697 | * ses->sectype = RawNTLMSSP; | |
698 | * but for time being this is our only auth choice so doesn't matter. | |
699 | * We just found a server which sets blob length to zero expecting raw. | |
700 | */ | |
67dbea2c | 701 | if (blob_length == 0) { |
5d875cc9 | 702 | cifs_dbg(FYI, "missing security blob on negprot\n"); |
67dbea2c PS |
703 | server->sec_ntlmssp = true; |
704 | } | |
3c1bf7e4 | 705 | |
38d77c50 | 706 | rc = cifs_enable_signing(server, ses->sign); |
9ddec561 JL |
707 | if (rc) |
708 | goto neg_exit; | |
ceb1b0b9 | 709 | if (blob_length) { |
ebdd207e | 710 | rc = decode_negTokenInit(security_blob, blob_length, server); |
ceb1b0b9 SF |
711 | if (rc == 1) |
712 | rc = 0; | |
713 | else if (rc == 0) | |
714 | rc = -EIO; | |
ec2e4523 | 715 | } |
5100d8a3 SF |
716 | |
717 | #ifdef CONFIG_CIFS_SMB311 | |
718 | if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID)) { | |
719 | if (rsp->NegotiateContextCount) | |
720 | rc = smb311_decode_neg_context(rsp, server); | |
721 | else | |
722 | cifs_dbg(VFS, "Missing expected negotiate contexts\n"); | |
723 | } | |
724 | #endif /* CONFIG_CIFS_SMB311 */ | |
ec2e4523 PS |
725 | neg_exit: |
726 | free_rsp_buf(resp_buftype, rsp); | |
727 | return rc; | |
728 | } | |
5478f9ba | 729 | |
ff1c038a SF |
730 | int smb3_validate_negotiate(const unsigned int xid, struct cifs_tcon *tcon) |
731 | { | |
732 | int rc = 0; | |
733 | struct validate_negotiate_info_req vneg_inbuf; | |
fe83bebc | 734 | struct validate_negotiate_info_rsp *pneg_rsp = NULL; |
ff1c038a | 735 | u32 rsplen; |
9764c02f | 736 | u32 inbuflen; /* max of 4 dialects */ |
ff1c038a SF |
737 | |
738 | cifs_dbg(FYI, "validate negotiate\n"); | |
739 | ||
8801e902 LL |
740 | #ifdef CONFIG_CIFS_SMB_DIRECT |
741 | if (tcon->ses->server->rdma) | |
742 | return 0; | |
743 | #endif | |
744 | ||
8bd68c6e AA |
745 | /* In SMB3.11 preauth integrity supersedes validate negotiate */ |
746 | if (tcon->ses->server->dialect == SMB311_PROT_ID) | |
747 | return 0; | |
748 | ||
ff1c038a SF |
749 | /* |
750 | * validation ioctl must be signed, so no point sending this if we | |
0603c96f SF |
751 | * can not sign it (ie are not known user). Even if signing is not |
752 | * required (enabled but not negotiated), in those cases we selectively | |
ff1c038a | 753 | * sign just this, the first and only signed request on a connection. |
0603c96f | 754 | * Having validation of negotiate info helps reduce attack vectors. |
ff1c038a | 755 | */ |
0603c96f | 756 | if (tcon->ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST) |
ff1c038a SF |
757 | return 0; /* validation requires signing */ |
758 | ||
0603c96f SF |
759 | if (tcon->ses->user_name == NULL) { |
760 | cifs_dbg(FYI, "Can't validate negotiate: null user mount\n"); | |
761 | return 0; /* validation requires signing */ | |
762 | } | |
763 | ||
764 | if (tcon->ses->session_flags & SMB2_SESSION_FLAG_IS_NULL) | |
765 | cifs_dbg(VFS, "Unexpected null user (anonymous) auth flag sent by server\n"); | |
766 | ||
ff1c038a SF |
767 | vneg_inbuf.Capabilities = |
768 | cpu_to_le32(tcon->ses->server->vals->req_capabilities); | |
39552ea8 SP |
769 | memcpy(vneg_inbuf.Guid, tcon->ses->server->client_guid, |
770 | SMB2_CLIENT_GUID_SIZE); | |
ff1c038a SF |
771 | |
772 | if (tcon->ses->sign) | |
773 | vneg_inbuf.SecurityMode = | |
774 | cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED); | |
775 | else if (global_secflags & CIFSSEC_MAY_SIGN) | |
776 | vneg_inbuf.SecurityMode = | |
777 | cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED); | |
778 | else | |
779 | vneg_inbuf.SecurityMode = 0; | |
780 | ||
9764c02f SF |
781 | |
782 | if (strcmp(tcon->ses->server->vals->version_string, | |
783 | SMB3ANY_VERSION_STRING) == 0) { | |
784 | vneg_inbuf.Dialects[0] = cpu_to_le16(SMB30_PROT_ID); | |
785 | vneg_inbuf.Dialects[1] = cpu_to_le16(SMB302_PROT_ID); | |
786 | vneg_inbuf.DialectCount = cpu_to_le16(2); | |
787 | /* structure is big enough for 3 dialects, sending only 2 */ | |
788 | inbuflen = sizeof(struct validate_negotiate_info_req) - 2; | |
789 | } else if (strcmp(tcon->ses->server->vals->version_string, | |
790 | SMBDEFAULT_VERSION_STRING) == 0) { | |
791 | vneg_inbuf.Dialects[0] = cpu_to_le16(SMB21_PROT_ID); | |
792 | vneg_inbuf.Dialects[1] = cpu_to_le16(SMB30_PROT_ID); | |
793 | vneg_inbuf.Dialects[2] = cpu_to_le16(SMB302_PROT_ID); | |
794 | vneg_inbuf.DialectCount = cpu_to_le16(3); | |
795 | /* structure is big enough for 3 dialects */ | |
796 | inbuflen = sizeof(struct validate_negotiate_info_req); | |
797 | } else { | |
798 | /* otherwise specific dialect was requested */ | |
799 | vneg_inbuf.Dialects[0] = | |
800 | cpu_to_le16(tcon->ses->server->vals->protocol_id); | |
801 | vneg_inbuf.DialectCount = cpu_to_le16(1); | |
802 | /* structure is big enough for 3 dialects, sending only 1 */ | |
803 | inbuflen = sizeof(struct validate_negotiate_info_req) - 4; | |
804 | } | |
ff1c038a SF |
805 | |
806 | rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID, | |
807 | FSCTL_VALIDATE_NEGOTIATE_INFO, true /* is_fsctl */, | |
808 | (char *)&vneg_inbuf, sizeof(struct validate_negotiate_info_req), | |
809 | (char **)&pneg_rsp, &rsplen); | |
810 | ||
811 | if (rc != 0) { | |
812 | cifs_dbg(VFS, "validate protocol negotiate failed: %d\n", rc); | |
813 | return -EIO; | |
814 | } | |
815 | ||
816 | if (rsplen != sizeof(struct validate_negotiate_info_rsp)) { | |
7db0a6ef SF |
817 | cifs_dbg(VFS, "invalid protocol negotiate response size: %d\n", |
818 | rsplen); | |
819 | ||
820 | /* relax check since Mac returns max bufsize allowed on ioctl */ | |
a2d9daad DD |
821 | if ((rsplen > CIFSMaxBufSize) |
822 | || (rsplen < sizeof(struct validate_negotiate_info_rsp))) | |
fe83bebc | 823 | goto err_rsp_free; |
ff1c038a SF |
824 | } |
825 | ||
826 | /* check validate negotiate info response matches what we got earlier */ | |
9aca7e45 | 827 | if (pneg_rsp->Dialect != cpu_to_le16(tcon->ses->server->dialect)) |
ff1c038a SF |
828 | goto vneg_out; |
829 | ||
830 | if (pneg_rsp->SecurityMode != cpu_to_le16(tcon->ses->server->sec_mode)) | |
831 | goto vneg_out; | |
832 | ||
833 | /* do not validate server guid because not saved at negprot time yet */ | |
834 | ||
835 | if ((le32_to_cpu(pneg_rsp->Capabilities) | SMB2_NT_FIND | | |
836 | SMB2_LARGE_FILES) != tcon->ses->server->capabilities) | |
837 | goto vneg_out; | |
838 | ||
839 | /* validate negotiate successful */ | |
840 | cifs_dbg(FYI, "validate negotiate info successful\n"); | |
fe83bebc | 841 | kfree(pneg_rsp); |
ff1c038a SF |
842 | return 0; |
843 | ||
844 | vneg_out: | |
845 | cifs_dbg(VFS, "protocol revalidation - security settings mismatch\n"); | |
fe83bebc DD |
846 | err_rsp_free: |
847 | kfree(pneg_rsp); | |
ff1c038a SF |
848 | return -EIO; |
849 | } | |
850 | ||
ef65aaed SP |
851 | enum securityEnum |
852 | smb2_select_sectype(struct TCP_Server_Info *server, enum securityEnum requested) | |
853 | { | |
854 | switch (requested) { | |
855 | case Kerberos: | |
856 | case RawNTLMSSP: | |
857 | return requested; | |
858 | case NTLMv2: | |
859 | return RawNTLMSSP; | |
860 | case Unspecified: | |
861 | if (server->sec_ntlmssp && | |
862 | (global_secflags & CIFSSEC_MAY_NTLMSSP)) | |
863 | return RawNTLMSSP; | |
864 | if ((server->sec_kerberos || server->sec_mskerberos) && | |
865 | (global_secflags & CIFSSEC_MAY_KRB5)) | |
866 | return Kerberos; | |
867 | /* Fallthrough */ | |
868 | default: | |
869 | return Unspecified; | |
870 | } | |
871 | } | |
872 | ||
3baf1a7b SP |
873 | struct SMB2_sess_data { |
874 | unsigned int xid; | |
875 | struct cifs_ses *ses; | |
876 | struct nls_table *nls_cp; | |
877 | void (*func)(struct SMB2_sess_data *); | |
878 | int result; | |
879 | u64 previous_session; | |
880 | ||
881 | /* we will send the SMB in three pieces: | |
882 | * a fixed length beginning part, an optional | |
883 | * SPNEGO blob (which can be zero length), and a | |
884 | * last part which will include the strings | |
885 | * and rest of bcc area. This allows us to avoid | |
886 | * a large buffer 17K allocation | |
887 | */ | |
888 | int buf0_type; | |
889 | struct kvec iov[2]; | |
890 | }; | |
891 | ||
892 | static int | |
893 | SMB2_sess_alloc_buffer(struct SMB2_sess_data *sess_data) | |
894 | { | |
895 | int rc; | |
896 | struct cifs_ses *ses = sess_data->ses; | |
897 | struct smb2_sess_setup_req *req; | |
898 | struct TCP_Server_Info *server = ses->server; | |
88ea5cb7 | 899 | unsigned int total_len; |
3baf1a7b | 900 | |
88ea5cb7 RS |
901 | rc = smb2_plain_req_init(SMB2_SESSION_SETUP, NULL, (void **) &req, |
902 | &total_len); | |
3baf1a7b SP |
903 | if (rc) |
904 | return rc; | |
905 | ||
31473fc4 | 906 | /* First session, not a reauthenticate */ |
88ea5cb7 | 907 | req->sync_hdr.SessionId = 0; |
3baf1a7b SP |
908 | |
909 | /* if reconnect, we need to send previous sess id, otherwise it is 0 */ | |
910 | req->PreviousSessionId = sess_data->previous_session; | |
911 | ||
912 | req->Flags = 0; /* MBZ */ | |
913 | /* to enable echos and oplocks */ | |
88ea5cb7 | 914 | req->sync_hdr.CreditRequest = cpu_to_le16(3); |
3baf1a7b SP |
915 | |
916 | /* only one of SMB2 signing flags may be set in SMB2 request */ | |
917 | if (server->sign) | |
918 | req->SecurityMode = SMB2_NEGOTIATE_SIGNING_REQUIRED; | |
919 | else if (global_secflags & CIFSSEC_MAY_SIGN) /* one flag unlike MUST_ */ | |
920 | req->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED; | |
921 | else | |
922 | req->SecurityMode = 0; | |
923 | ||
924 | req->Capabilities = 0; | |
925 | req->Channel = 0; /* MBZ */ | |
926 | ||
927 | sess_data->iov[0].iov_base = (char *)req; | |
88ea5cb7 RS |
928 | /* 1 for pad */ |
929 | sess_data->iov[0].iov_len = total_len - 1; | |
3baf1a7b SP |
930 | /* |
931 | * This variable will be used to clear the buffer | |
932 | * allocated above in case of any error in the calling function. | |
933 | */ | |
934 | sess_data->buf0_type = CIFS_SMALL_BUFFER; | |
935 | ||
936 | return 0; | |
937 | } | |
938 | ||
939 | static void | |
940 | SMB2_sess_free_buffer(struct SMB2_sess_data *sess_data) | |
941 | { | |
942 | free_rsp_buf(sess_data->buf0_type, sess_data->iov[0].iov_base); | |
943 | sess_data->buf0_type = CIFS_NO_BUFFER; | |
944 | } | |
945 | ||
946 | static int | |
947 | SMB2_sess_sendreceive(struct SMB2_sess_data *sess_data) | |
948 | { | |
949 | int rc; | |
950 | struct smb2_sess_setup_req *req = sess_data->iov[0].iov_base; | |
da502f7d | 951 | struct kvec rsp_iov = { NULL, 0 }; |
3baf1a7b SP |
952 | |
953 | /* Testing shows that buffer offset must be at location of Buffer[0] */ | |
954 | req->SecurityBufferOffset = | |
88ea5cb7 | 955 | cpu_to_le16(sizeof(struct smb2_sess_setup_req) - 1 /* pad */); |
3baf1a7b SP |
956 | req->SecurityBufferLength = cpu_to_le16(sess_data->iov[1].iov_len); |
957 | ||
3baf1a7b SP |
958 | /* BB add code to build os and lm fields */ |
959 | ||
88ea5cb7 RS |
960 | rc = smb2_send_recv(sess_data->xid, sess_data->ses, |
961 | sess_data->iov, 2, | |
962 | &sess_data->buf0_type, | |
963 | CIFS_LOG_ERROR | CIFS_NEG_OP, &rsp_iov); | |
da502f7d PS |
964 | cifs_small_buf_release(sess_data->iov[0].iov_base); |
965 | memcpy(&sess_data->iov[0], &rsp_iov, sizeof(struct kvec)); | |
3baf1a7b SP |
966 | |
967 | return rc; | |
968 | } | |
969 | ||
970 | static int | |
971 | SMB2_sess_establish_session(struct SMB2_sess_data *sess_data) | |
972 | { | |
973 | int rc = 0; | |
974 | struct cifs_ses *ses = sess_data->ses; | |
975 | ||
976 | mutex_lock(&ses->server->srv_mutex); | |
cabfb368 | 977 | if (ses->server->ops->generate_signingkey) { |
3baf1a7b | 978 | rc = ses->server->ops->generate_signingkey(ses); |
3baf1a7b SP |
979 | if (rc) { |
980 | cifs_dbg(FYI, | |
981 | "SMB3 session key generation failed\n"); | |
982 | mutex_unlock(&ses->server->srv_mutex); | |
cabfb368 | 983 | return rc; |
3baf1a7b SP |
984 | } |
985 | } | |
986 | if (!ses->server->session_estab) { | |
987 | ses->server->sequence_number = 0x2; | |
988 | ses->server->session_estab = true; | |
989 | } | |
990 | mutex_unlock(&ses->server->srv_mutex); | |
991 | ||
992 | cifs_dbg(FYI, "SMB2/3 session established successfully\n"); | |
993 | spin_lock(&GlobalMid_Lock); | |
994 | ses->status = CifsGood; | |
995 | ses->need_reconnect = false; | |
996 | spin_unlock(&GlobalMid_Lock); | |
3baf1a7b SP |
997 | return rc; |
998 | } | |
999 | ||
1000 | #ifdef CONFIG_CIFS_UPCALL | |
1001 | static void | |
1002 | SMB2_auth_kerberos(struct SMB2_sess_data *sess_data) | |
1003 | { | |
1004 | int rc; | |
1005 | struct cifs_ses *ses = sess_data->ses; | |
1006 | struct cifs_spnego_msg *msg; | |
1007 | struct key *spnego_key = NULL; | |
1008 | struct smb2_sess_setup_rsp *rsp = NULL; | |
1009 | ||
1010 | rc = SMB2_sess_alloc_buffer(sess_data); | |
1011 | if (rc) | |
1012 | goto out; | |
1013 | ||
1014 | spnego_key = cifs_get_spnego_key(ses); | |
1015 | if (IS_ERR(spnego_key)) { | |
1016 | rc = PTR_ERR(spnego_key); | |
1017 | spnego_key = NULL; | |
1018 | goto out; | |
1019 | } | |
1020 | ||
1021 | msg = spnego_key->payload.data[0]; | |
1022 | /* | |
1023 | * check version field to make sure that cifs.upcall is | |
1024 | * sending us a response in an expected form | |
1025 | */ | |
1026 | if (msg->version != CIFS_SPNEGO_UPCALL_VERSION) { | |
1027 | cifs_dbg(VFS, | |
1028 | "bad cifs.upcall version. Expected %d got %d", | |
1029 | CIFS_SPNEGO_UPCALL_VERSION, msg->version); | |
1030 | rc = -EKEYREJECTED; | |
1031 | goto out_put_spnego_key; | |
1032 | } | |
1033 | ||
1034 | ses->auth_key.response = kmemdup(msg->data, msg->sesskey_len, | |
1035 | GFP_KERNEL); | |
1036 | if (!ses->auth_key.response) { | |
1037 | cifs_dbg(VFS, | |
1038 | "Kerberos can't allocate (%u bytes) memory", | |
1039 | msg->sesskey_len); | |
1040 | rc = -ENOMEM; | |
1041 | goto out_put_spnego_key; | |
1042 | } | |
1043 | ses->auth_key.len = msg->sesskey_len; | |
1044 | ||
1045 | sess_data->iov[1].iov_base = msg->data + msg->sesskey_len; | |
1046 | sess_data->iov[1].iov_len = msg->secblob_len; | |
1047 | ||
1048 | rc = SMB2_sess_sendreceive(sess_data); | |
1049 | if (rc) | |
1050 | goto out_put_spnego_key; | |
1051 | ||
1052 | rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base; | |
31473fc4 | 1053 | ses->Suid = rsp->hdr.sync_hdr.SessionId; |
3baf1a7b SP |
1054 | |
1055 | ses->session_flags = le16_to_cpu(rsp->SessionFlags); | |
3baf1a7b SP |
1056 | |
1057 | rc = SMB2_sess_establish_session(sess_data); | |
1058 | out_put_spnego_key: | |
1059 | key_invalidate(spnego_key); | |
1060 | key_put(spnego_key); | |
1061 | out: | |
1062 | sess_data->result = rc; | |
1063 | sess_data->func = NULL; | |
1064 | SMB2_sess_free_buffer(sess_data); | |
1065 | } | |
1066 | #else | |
1067 | static void | |
1068 | SMB2_auth_kerberos(struct SMB2_sess_data *sess_data) | |
1069 | { | |
1070 | cifs_dbg(VFS, "Kerberos negotiated but upcall support disabled!\n"); | |
1071 | sess_data->result = -EOPNOTSUPP; | |
1072 | sess_data->func = NULL; | |
1073 | } | |
1074 | #endif | |
1075 | ||
166cea4d SP |
1076 | static void |
1077 | SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data *sess_data); | |
1078 | ||
1079 | static void | |
1080 | SMB2_sess_auth_rawntlmssp_negotiate(struct SMB2_sess_data *sess_data) | |
5478f9ba | 1081 | { |
166cea4d SP |
1082 | int rc; |
1083 | struct cifs_ses *ses = sess_data->ses; | |
5478f9ba | 1084 | struct smb2_sess_setup_rsp *rsp = NULL; |
166cea4d | 1085 | char *ntlmssp_blob = NULL; |
5478f9ba | 1086 | bool use_spnego = false; /* else use raw ntlmssp */ |
166cea4d | 1087 | u16 blob_length = 0; |
d4e63bd6 | 1088 | |
5478f9ba PS |
1089 | /* |
1090 | * If memory allocation is successful, caller of this function | |
1091 | * frees it. | |
1092 | */ | |
1093 | ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL); | |
166cea4d SP |
1094 | if (!ses->ntlmssp) { |
1095 | rc = -ENOMEM; | |
1096 | goto out_err; | |
1097 | } | |
5c234aa5 | 1098 | ses->ntlmssp->sesskey_per_smbsess = true; |
5478f9ba | 1099 | |
166cea4d | 1100 | rc = SMB2_sess_alloc_buffer(sess_data); |
5478f9ba | 1101 | if (rc) |
166cea4d | 1102 | goto out_err; |
5478f9ba | 1103 | |
166cea4d SP |
1104 | ntlmssp_blob = kmalloc(sizeof(struct _NEGOTIATE_MESSAGE), |
1105 | GFP_KERNEL); | |
1106 | if (ntlmssp_blob == NULL) { | |
1107 | rc = -ENOMEM; | |
1108 | goto out; | |
1109 | } | |
c2afb814 | 1110 | |
166cea4d SP |
1111 | build_ntlmssp_negotiate_blob(ntlmssp_blob, ses); |
1112 | if (use_spnego) { | |
1113 | /* BB eventually need to add this */ | |
1114 | cifs_dbg(VFS, "spnego not supported for SMB2 yet\n"); | |
1115 | rc = -EOPNOTSUPP; | |
1116 | goto out; | |
1117 | } else { | |
1118 | blob_length = sizeof(struct _NEGOTIATE_MESSAGE); | |
1119 | /* with raw NTLMSSP we don't encapsulate in SPNEGO */ | |
1120 | } | |
1121 | sess_data->iov[1].iov_base = ntlmssp_blob; | |
1122 | sess_data->iov[1].iov_len = blob_length; | |
c2afb814 | 1123 | |
166cea4d SP |
1124 | rc = SMB2_sess_sendreceive(sess_data); |
1125 | rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base; | |
5478f9ba | 1126 | |
166cea4d SP |
1127 | /* If true, rc here is expected and not an error */ |
1128 | if (sess_data->buf0_type != CIFS_NO_BUFFER && | |
31473fc4 | 1129 | rsp->hdr.sync_hdr.Status == STATUS_MORE_PROCESSING_REQUIRED) |
166cea4d | 1130 | rc = 0; |
38d77c50 | 1131 | |
166cea4d SP |
1132 | if (rc) |
1133 | goto out; | |
5478f9ba | 1134 | |
9fdd2e00 | 1135 | if (offsetof(struct smb2_sess_setup_rsp, Buffer) - ses->server->vals->header_preamble_size != |
166cea4d SP |
1136 | le16_to_cpu(rsp->SecurityBufferOffset)) { |
1137 | cifs_dbg(VFS, "Invalid security buffer offset %d\n", | |
1138 | le16_to_cpu(rsp->SecurityBufferOffset)); | |
5478f9ba | 1139 | rc = -EIO; |
166cea4d | 1140 | goto out; |
5478f9ba | 1141 | } |
166cea4d SP |
1142 | rc = decode_ntlmssp_challenge(rsp->Buffer, |
1143 | le16_to_cpu(rsp->SecurityBufferLength), ses); | |
1144 | if (rc) | |
1145 | goto out; | |
5478f9ba | 1146 | |
166cea4d | 1147 | cifs_dbg(FYI, "rawntlmssp session setup challenge phase\n"); |
5478f9ba | 1148 | |
5478f9ba | 1149 | |
31473fc4 | 1150 | ses->Suid = rsp->hdr.sync_hdr.SessionId; |
166cea4d | 1151 | ses->session_flags = le16_to_cpu(rsp->SessionFlags); |
166cea4d SP |
1152 | |
1153 | out: | |
1154 | kfree(ntlmssp_blob); | |
1155 | SMB2_sess_free_buffer(sess_data); | |
1156 | if (!rc) { | |
1157 | sess_data->result = 0; | |
1158 | sess_data->func = SMB2_sess_auth_rawntlmssp_authenticate; | |
1159 | return; | |
1160 | } | |
1161 | out_err: | |
1162 | kfree(ses->ntlmssp); | |
1163 | ses->ntlmssp = NULL; | |
1164 | sess_data->result = rc; | |
1165 | sess_data->func = NULL; | |
1166 | } | |
5478f9ba | 1167 | |
166cea4d SP |
1168 | static void |
1169 | SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data *sess_data) | |
1170 | { | |
1171 | int rc; | |
1172 | struct cifs_ses *ses = sess_data->ses; | |
1173 | struct smb2_sess_setup_req *req; | |
1174 | struct smb2_sess_setup_rsp *rsp = NULL; | |
1175 | unsigned char *ntlmssp_blob = NULL; | |
1176 | bool use_spnego = false; /* else use raw ntlmssp */ | |
1177 | u16 blob_length = 0; | |
5478f9ba | 1178 | |
166cea4d SP |
1179 | rc = SMB2_sess_alloc_buffer(sess_data); |
1180 | if (rc) | |
1181 | goto out; | |
5478f9ba | 1182 | |
166cea4d | 1183 | req = (struct smb2_sess_setup_req *) sess_data->iov[0].iov_base; |
88ea5cb7 | 1184 | req->sync_hdr.SessionId = ses->Suid; |
166cea4d SP |
1185 | |
1186 | rc = build_ntlmssp_auth_blob(&ntlmssp_blob, &blob_length, ses, | |
1187 | sess_data->nls_cp); | |
1188 | if (rc) { | |
1189 | cifs_dbg(FYI, "build_ntlmssp_auth_blob failed %d\n", rc); | |
1190 | goto out; | |
5478f9ba PS |
1191 | } |
1192 | ||
166cea4d SP |
1193 | if (use_spnego) { |
1194 | /* BB eventually need to add this */ | |
1195 | cifs_dbg(VFS, "spnego not supported for SMB2 yet\n"); | |
1196 | rc = -EOPNOTSUPP; | |
1197 | goto out; | |
1198 | } | |
1199 | sess_data->iov[1].iov_base = ntlmssp_blob; | |
1200 | sess_data->iov[1].iov_len = blob_length; | |
5478f9ba | 1201 | |
166cea4d SP |
1202 | rc = SMB2_sess_sendreceive(sess_data); |
1203 | if (rc) | |
1204 | goto out; | |
1205 | ||
1206 | rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base; | |
1207 | ||
31473fc4 | 1208 | ses->Suid = rsp->hdr.sync_hdr.SessionId; |
5478f9ba | 1209 | ses->session_flags = le16_to_cpu(rsp->SessionFlags); |
5478f9ba | 1210 | |
166cea4d SP |
1211 | rc = SMB2_sess_establish_session(sess_data); |
1212 | out: | |
1213 | kfree(ntlmssp_blob); | |
1214 | SMB2_sess_free_buffer(sess_data); | |
1215 | kfree(ses->ntlmssp); | |
1216 | ses->ntlmssp = NULL; | |
1217 | sess_data->result = rc; | |
1218 | sess_data->func = NULL; | |
1219 | } | |
d4e63bd6 | 1220 | |
166cea4d SP |
1221 | static int |
1222 | SMB2_select_sec(struct cifs_ses *ses, struct SMB2_sess_data *sess_data) | |
1223 | { | |
ef65aaed SP |
1224 | int type; |
1225 | ||
1226 | type = smb2_select_sectype(ses->server, ses->sectype); | |
1227 | cifs_dbg(FYI, "sess setup type %d\n", type); | |
1228 | if (type == Unspecified) { | |
1229 | cifs_dbg(VFS, | |
1230 | "Unable to select appropriate authentication method!"); | |
1231 | return -EINVAL; | |
1232 | } | |
d4e63bd6 | 1233 | |
ef65aaed | 1234 | switch (type) { |
166cea4d SP |
1235 | case Kerberos: |
1236 | sess_data->func = SMB2_auth_kerberos; | |
1237 | break; | |
1238 | case RawNTLMSSP: | |
1239 | sess_data->func = SMB2_sess_auth_rawntlmssp_negotiate; | |
1240 | break; | |
1241 | default: | |
ef65aaed | 1242 | cifs_dbg(VFS, "secType %d not supported!\n", type); |
166cea4d | 1243 | return -EOPNOTSUPP; |
d4e63bd6 SP |
1244 | } |
1245 | ||
166cea4d SP |
1246 | return 0; |
1247 | } | |
1248 | ||
1249 | int | |
1250 | SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses, | |
1251 | const struct nls_table *nls_cp) | |
1252 | { | |
1253 | int rc = 0; | |
1254 | struct TCP_Server_Info *server = ses->server; | |
1255 | struct SMB2_sess_data *sess_data; | |
1256 | ||
1257 | cifs_dbg(FYI, "Session Setup\n"); | |
1258 | ||
1259 | if (!server) { | |
1260 | WARN(1, "%s: server is NULL!\n", __func__); | |
1261 | return -EIO; | |
d4e63bd6 | 1262 | } |
d4e63bd6 | 1263 | |
166cea4d SP |
1264 | sess_data = kzalloc(sizeof(struct SMB2_sess_data), GFP_KERNEL); |
1265 | if (!sess_data) | |
1266 | return -ENOMEM; | |
1267 | ||
1268 | rc = SMB2_select_sec(ses, sess_data); | |
1269 | if (rc) | |
1270 | goto out; | |
1271 | sess_data->xid = xid; | |
1272 | sess_data->ses = ses; | |
1273 | sess_data->buf0_type = CIFS_NO_BUFFER; | |
1274 | sess_data->nls_cp = (struct nls_table *) nls_cp; | |
1275 | ||
8bd68c6e AA |
1276 | #ifdef CONFIG_CIFS_SMB311 |
1277 | /* | |
1278 | * Initialize the session hash with the server one. | |
1279 | */ | |
1280 | memcpy(ses->preauth_sha_hash, ses->server->preauth_sha_hash, | |
1281 | SMB2_PREAUTH_HASH_SIZE); | |
1282 | #endif | |
1283 | ||
166cea4d SP |
1284 | while (sess_data->func) |
1285 | sess_data->func(sess_data); | |
1286 | ||
c721c389 SF |
1287 | if ((ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST) && (ses->sign)) |
1288 | cifs_dbg(VFS, "signing requested but authenticated as guest\n"); | |
3baf1a7b | 1289 | rc = sess_data->result; |
166cea4d | 1290 | out: |
3baf1a7b | 1291 | kfree(sess_data); |
5478f9ba PS |
1292 | return rc; |
1293 | } | |
1294 | ||
1295 | int | |
1296 | SMB2_logoff(const unsigned int xid, struct cifs_ses *ses) | |
1297 | { | |
1298 | struct smb2_logoff_req *req; /* response is also trivial struct */ | |
1299 | int rc = 0; | |
1300 | struct TCP_Server_Info *server; | |
7fb8986e | 1301 | int flags = 0; |
45305eda RS |
1302 | unsigned int total_len; |
1303 | struct kvec iov[1]; | |
1304 | struct kvec rsp_iov; | |
1305 | int resp_buf_type; | |
5478f9ba | 1306 | |
f96637be | 1307 | cifs_dbg(FYI, "disconnect session %p\n", ses); |
5478f9ba PS |
1308 | |
1309 | if (ses && (ses->server)) | |
1310 | server = ses->server; | |
1311 | else | |
1312 | return -EIO; | |
1313 | ||
eb4c7df6 SP |
1314 | /* no need to send SMB logoff if uid already closed due to reconnect */ |
1315 | if (ses->need_reconnect) | |
1316 | goto smb2_session_already_dead; | |
1317 | ||
45305eda | 1318 | rc = smb2_plain_req_init(SMB2_LOGOFF, NULL, (void **) &req, &total_len); |
5478f9ba PS |
1319 | if (rc) |
1320 | return rc; | |
1321 | ||
1322 | /* since no tcon, smb2_init can not do this, so do here */ | |
45305eda | 1323 | req->sync_hdr.SessionId = ses->Suid; |
7fb8986e PS |
1324 | |
1325 | if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) | |
1326 | flags |= CIFS_TRANSFORM_REQ; | |
1327 | else if (server->sign) | |
45305eda RS |
1328 | req->sync_hdr.Flags |= SMB2_FLAGS_SIGNED; |
1329 | ||
1330 | flags |= CIFS_NO_RESP; | |
1331 | ||
1332 | iov[0].iov_base = (char *)req; | |
1333 | iov[0].iov_len = total_len; | |
5478f9ba | 1334 | |
45305eda | 1335 | rc = smb2_send_recv(xid, ses, iov, 1, &resp_buf_type, flags, &rsp_iov); |
da502f7d | 1336 | cifs_small_buf_release(req); |
5478f9ba PS |
1337 | /* |
1338 | * No tcon so can't do | |
1339 | * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]); | |
1340 | */ | |
eb4c7df6 SP |
1341 | |
1342 | smb2_session_already_dead: | |
5478f9ba PS |
1343 | return rc; |
1344 | } | |
faaf946a PS |
1345 | |
1346 | static inline void cifs_stats_fail_inc(struct cifs_tcon *tcon, uint16_t code) | |
1347 | { | |
d60622eb | 1348 | cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_failed[code]); |
faaf946a PS |
1349 | } |
1350 | ||
1351 | #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */) | |
1352 | ||
de9f68df SF |
1353 | /* These are similar values to what Windows uses */ |
1354 | static inline void init_copy_chunk_defaults(struct cifs_tcon *tcon) | |
1355 | { | |
1356 | tcon->max_chunks = 256; | |
1357 | tcon->max_bytes_chunk = 1048576; | |
1358 | tcon->max_bytes_copy = 16777216; | |
1359 | } | |
1360 | ||
faaf946a PS |
1361 | int |
1362 | SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree, | |
1363 | struct cifs_tcon *tcon, const struct nls_table *cp) | |
1364 | { | |
1365 | struct smb2_tree_connect_req *req; | |
1366 | struct smb2_tree_connect_rsp *rsp = NULL; | |
1367 | struct kvec iov[2]; | |
db3b5474 | 1368 | struct kvec rsp_iov = { NULL, 0 }; |
faaf946a PS |
1369 | int rc = 0; |
1370 | int resp_buftype; | |
1371 | int unc_path_len; | |
faaf946a | 1372 | __le16 *unc_path = NULL; |
7fb8986e | 1373 | int flags = 0; |
661bb943 | 1374 | unsigned int total_len; |
faaf946a | 1375 | |
f96637be | 1376 | cifs_dbg(FYI, "TCON\n"); |
faaf946a | 1377 | |
68a6afa7 | 1378 | if (!(ses->server) || !tree) |
faaf946a PS |
1379 | return -EIO; |
1380 | ||
faaf946a PS |
1381 | unc_path = kmalloc(MAX_SHARENAME_LENGTH * 2, GFP_KERNEL); |
1382 | if (unc_path == NULL) | |
1383 | return -ENOMEM; | |
1384 | ||
1385 | unc_path_len = cifs_strtoUTF16(unc_path, tree, strlen(tree), cp) + 1; | |
1386 | unc_path_len *= 2; | |
1387 | if (unc_path_len < 2) { | |
1388 | kfree(unc_path); | |
1389 | return -EINVAL; | |
1390 | } | |
1391 | ||
806a28ef | 1392 | /* SMB2 TREE_CONNECT request must be called with TreeId == 0 */ |
b327a717 | 1393 | tcon->tid = 0; |
806a28ef | 1394 | |
661bb943 RS |
1395 | rc = smb2_plain_req_init(SMB2_TREE_CONNECT, tcon, (void **) &req, |
1396 | &total_len); | |
faaf946a PS |
1397 | if (rc) { |
1398 | kfree(unc_path); | |
1399 | return rc; | |
1400 | } | |
1401 | ||
b327a717 | 1402 | if (encryption_required(tcon)) |
ae6f8dd4 | 1403 | flags |= CIFS_TRANSFORM_REQ; |
faaf946a PS |
1404 | |
1405 | iov[0].iov_base = (char *)req; | |
661bb943 RS |
1406 | /* 1 for pad */ |
1407 | iov[0].iov_len = total_len - 1; | |
faaf946a PS |
1408 | |
1409 | /* Testing shows that buffer offset must be at location of Buffer[0] */ | |
1410 | req->PathOffset = cpu_to_le16(sizeof(struct smb2_tree_connect_req) | |
661bb943 | 1411 | - 1 /* pad */); |
faaf946a PS |
1412 | req->PathLength = cpu_to_le16(unc_path_len - 2); |
1413 | iov[1].iov_base = unc_path; | |
1414 | iov[1].iov_len = unc_path_len; | |
1415 | ||
6188f28b SF |
1416 | /* 3.11 tcon req must be signed if not encrypted. See MS-SMB2 3.2.4.1.1 */ |
1417 | if ((ses->server->dialect == SMB311_PROT_ID) && | |
1418 | !encryption_required(tcon)) | |
1419 | req->sync_hdr.Flags |= SMB2_FLAGS_SIGNED; | |
1420 | ||
661bb943 | 1421 | rc = smb2_send_recv(xid, ses, iov, 2, &resp_buftype, flags, &rsp_iov); |
da502f7d PS |
1422 | cifs_small_buf_release(req); |
1423 | rsp = (struct smb2_tree_connect_rsp *)rsp_iov.iov_base; | |
faaf946a PS |
1424 | |
1425 | if (rc != 0) { | |
1426 | if (tcon) { | |
1427 | cifs_stats_fail_inc(tcon, SMB2_TREE_CONNECT_HE); | |
1428 | tcon->need_reconnect = true; | |
1429 | } | |
1430 | goto tcon_error_exit; | |
1431 | } | |
1432 | ||
cd123007 CJ |
1433 | switch (rsp->ShareType) { |
1434 | case SMB2_SHARE_TYPE_DISK: | |
f96637be | 1435 | cifs_dbg(FYI, "connection to disk share\n"); |
cd123007 CJ |
1436 | break; |
1437 | case SMB2_SHARE_TYPE_PIPE: | |
b327a717 | 1438 | tcon->pipe = true; |
f96637be | 1439 | cifs_dbg(FYI, "connection to pipe share\n"); |
cd123007 CJ |
1440 | break; |
1441 | case SMB2_SHARE_TYPE_PRINT: | |
b327a717 | 1442 | tcon->print = true; |
f96637be | 1443 | cifs_dbg(FYI, "connection to printer\n"); |
cd123007 CJ |
1444 | break; |
1445 | default: | |
f96637be | 1446 | cifs_dbg(VFS, "unknown share type %d\n", rsp->ShareType); |
faaf946a PS |
1447 | rc = -EOPNOTSUPP; |
1448 | goto tcon_error_exit; | |
1449 | } | |
1450 | ||
1451 | tcon->share_flags = le32_to_cpu(rsp->ShareFlags); | |
769ee6a4 | 1452 | tcon->capabilities = rsp->Capabilities; /* we keep caps little endian */ |
faaf946a PS |
1453 | tcon->maximal_access = le32_to_cpu(rsp->MaximalAccess); |
1454 | tcon->tidStatus = CifsGood; | |
1455 | tcon->need_reconnect = false; | |
31473fc4 | 1456 | tcon->tid = rsp->hdr.sync_hdr.TreeId; |
46b51d08 | 1457 | strlcpy(tcon->treeName, tree, sizeof(tcon->treeName)); |
faaf946a PS |
1458 | |
1459 | if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) && | |
1460 | ((tcon->share_flags & SHI1005_FLAGS_DFS) == 0)) | |
f96637be | 1461 | cifs_dbg(VFS, "DFS capability contradicts DFS flag\n"); |
ae6f8dd4 PS |
1462 | |
1463 | if (tcon->seal && | |
1464 | !(tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION)) | |
1465 | cifs_dbg(VFS, "Encryption is requested but not supported\n"); | |
1466 | ||
de9f68df | 1467 | init_copy_chunk_defaults(tcon); |
ff1c038a SF |
1468 | if (tcon->ses->server->ops->validate_negotiate) |
1469 | rc = tcon->ses->server->ops->validate_negotiate(xid, tcon); | |
faaf946a PS |
1470 | tcon_exit: |
1471 | free_rsp_buf(resp_buftype, rsp); | |
1472 | kfree(unc_path); | |
1473 | return rc; | |
1474 | ||
1475 | tcon_error_exit: | |
db3b5474 | 1476 | if (rsp && rsp->hdr.sync_hdr.Status == STATUS_BAD_NETWORK_NAME) { |
f96637be | 1477 | cifs_dbg(VFS, "BAD_NETWORK_NAME: %s\n", tree); |
faaf946a PS |
1478 | } |
1479 | goto tcon_exit; | |
1480 | } | |
1481 | ||
1482 | int | |
1483 | SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon) | |
1484 | { | |
1485 | struct smb2_tree_disconnect_req *req; /* response is trivial */ | |
1486 | int rc = 0; | |
faaf946a | 1487 | struct cifs_ses *ses = tcon->ses; |
7fb8986e | 1488 | int flags = 0; |
4eecf4cf RS |
1489 | unsigned int total_len; |
1490 | struct kvec iov[1]; | |
1491 | struct kvec rsp_iov; | |
1492 | int resp_buf_type; | |
faaf946a | 1493 | |
f96637be | 1494 | cifs_dbg(FYI, "Tree Disconnect\n"); |
faaf946a | 1495 | |
68a6afa7 | 1496 | if (!ses || !(ses->server)) |
faaf946a PS |
1497 | return -EIO; |
1498 | ||
1499 | if ((tcon->need_reconnect) || (tcon->ses->need_reconnect)) | |
1500 | return 0; | |
1501 | ||
4eecf4cf RS |
1502 | rc = smb2_plain_req_init(SMB2_TREE_DISCONNECT, tcon, (void **) &req, |
1503 | &total_len); | |
faaf946a PS |
1504 | if (rc) |
1505 | return rc; | |
1506 | ||
7fb8986e PS |
1507 | if (encryption_required(tcon)) |
1508 | flags |= CIFS_TRANSFORM_REQ; | |
1509 | ||
4eecf4cf RS |
1510 | flags |= CIFS_NO_RESP; |
1511 | ||
1512 | iov[0].iov_base = (char *)req; | |
1513 | iov[0].iov_len = total_len; | |
1514 | ||
1515 | rc = smb2_send_recv(xid, ses, iov, 1, &resp_buf_type, flags, &rsp_iov); | |
da502f7d | 1516 | cifs_small_buf_release(req); |
faaf946a PS |
1517 | if (rc) |
1518 | cifs_stats_fail_inc(tcon, SMB2_TREE_DISCONNECT_HE); | |
1519 | ||
1520 | return rc; | |
1521 | } | |
2503a0db | 1522 | |
b8c32dbb | 1523 | |
63eb3def PS |
1524 | static struct create_durable * |
1525 | create_durable_buf(void) | |
1526 | { | |
1527 | struct create_durable *buf; | |
1528 | ||
1529 | buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL); | |
1530 | if (!buf) | |
1531 | return NULL; | |
1532 | ||
1533 | buf->ccontext.DataOffset = cpu_to_le16(offsetof | |
9cbc0b73 | 1534 | (struct create_durable, Data)); |
63eb3def PS |
1535 | buf->ccontext.DataLength = cpu_to_le32(16); |
1536 | buf->ccontext.NameOffset = cpu_to_le16(offsetof | |
1537 | (struct create_durable, Name)); | |
1538 | buf->ccontext.NameLength = cpu_to_le16(4); | |
12197a7f | 1539 | /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DHnQ" */ |
63eb3def PS |
1540 | buf->Name[0] = 'D'; |
1541 | buf->Name[1] = 'H'; | |
1542 | buf->Name[2] = 'n'; | |
1543 | buf->Name[3] = 'Q'; | |
1544 | return buf; | |
1545 | } | |
1546 | ||
9cbc0b73 PS |
1547 | static struct create_durable * |
1548 | create_reconnect_durable_buf(struct cifs_fid *fid) | |
1549 | { | |
1550 | struct create_durable *buf; | |
1551 | ||
1552 | buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL); | |
1553 | if (!buf) | |
1554 | return NULL; | |
1555 | ||
1556 | buf->ccontext.DataOffset = cpu_to_le16(offsetof | |
1557 | (struct create_durable, Data)); | |
1558 | buf->ccontext.DataLength = cpu_to_le32(16); | |
1559 | buf->ccontext.NameOffset = cpu_to_le16(offsetof | |
1560 | (struct create_durable, Name)); | |
1561 | buf->ccontext.NameLength = cpu_to_le16(4); | |
1562 | buf->Data.Fid.PersistentFileId = fid->persistent_fid; | |
1563 | buf->Data.Fid.VolatileFileId = fid->volatile_fid; | |
12197a7f | 1564 | /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT is "DHnC" */ |
9cbc0b73 PS |
1565 | buf->Name[0] = 'D'; |
1566 | buf->Name[1] = 'H'; | |
1567 | buf->Name[2] = 'n'; | |
1568 | buf->Name[3] = 'C'; | |
1569 | return buf; | |
1570 | } | |
1571 | ||
b8c32dbb | 1572 | static __u8 |
42873b0a PS |
1573 | parse_lease_state(struct TCP_Server_Info *server, struct smb2_create_rsp *rsp, |
1574 | unsigned int *epoch) | |
b8c32dbb PS |
1575 | { |
1576 | char *data_offset; | |
b5c7cde3 | 1577 | struct create_context *cc; |
deb7deff JM |
1578 | unsigned int next; |
1579 | unsigned int remaining; | |
fd554396 | 1580 | char *name; |
b8c32dbb | 1581 | |
93012bf9 | 1582 | data_offset = (char *)rsp + server->vals->header_preamble_size + le32_to_cpu(rsp->CreateContextsOffset); |
deb7deff | 1583 | remaining = le32_to_cpu(rsp->CreateContextsLength); |
b5c7cde3 | 1584 | cc = (struct create_context *)data_offset; |
deb7deff | 1585 | while (remaining >= sizeof(struct create_context)) { |
b5c7cde3 | 1586 | name = le16_to_cpu(cc->NameOffset) + (char *)cc; |
deb7deff JM |
1587 | if (le16_to_cpu(cc->NameLength) == 4 && |
1588 | strncmp(name, "RqLs", 4) == 0) | |
1589 | return server->ops->parse_lease_buf(cc, epoch); | |
1590 | ||
1591 | next = le32_to_cpu(cc->Next); | |
1592 | if (!next) | |
1593 | break; | |
1594 | remaining -= next; | |
1595 | cc = (struct create_context *)((char *)cc + next); | |
1596 | } | |
b8c32dbb | 1597 | |
b5c7cde3 | 1598 | return 0; |
b8c32dbb PS |
1599 | } |
1600 | ||
d22cbfec | 1601 | static int |
a41a28bd PS |
1602 | add_lease_context(struct TCP_Server_Info *server, struct kvec *iov, |
1603 | unsigned int *num_iovec, __u8 *oplock) | |
d22cbfec PS |
1604 | { |
1605 | struct smb2_create_req *req = iov[0].iov_base; | |
1606 | unsigned int num = *num_iovec; | |
1607 | ||
a41a28bd | 1608 | iov[num].iov_base = server->ops->create_lease_buf(oplock+1, *oplock); |
d22cbfec PS |
1609 | if (iov[num].iov_base == NULL) |
1610 | return -ENOMEM; | |
a41a28bd | 1611 | iov[num].iov_len = server->vals->create_lease_size; |
d22cbfec PS |
1612 | req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_LEASE; |
1613 | if (!req->CreateContextsOffset) | |
1614 | req->CreateContextsOffset = cpu_to_le32( | |
4f33bc35 | 1615 | sizeof(struct smb2_create_req) + |
d22cbfec | 1616 | iov[num - 1].iov_len); |
a41a28bd PS |
1617 | le32_add_cpu(&req->CreateContextsLength, |
1618 | server->vals->create_lease_size); | |
d22cbfec PS |
1619 | *num_iovec = num + 1; |
1620 | return 0; | |
1621 | } | |
1622 | ||
b56eae4d SF |
1623 | static struct create_durable_v2 * |
1624 | create_durable_v2_buf(struct cifs_fid *pfid) | |
1625 | { | |
1626 | struct create_durable_v2 *buf; | |
1627 | ||
1628 | buf = kzalloc(sizeof(struct create_durable_v2), GFP_KERNEL); | |
1629 | if (!buf) | |
1630 | return NULL; | |
1631 | ||
1632 | buf->ccontext.DataOffset = cpu_to_le16(offsetof | |
1633 | (struct create_durable_v2, dcontext)); | |
1634 | buf->ccontext.DataLength = cpu_to_le32(sizeof(struct durable_context_v2)); | |
1635 | buf->ccontext.NameOffset = cpu_to_le16(offsetof | |
1636 | (struct create_durable_v2, Name)); | |
1637 | buf->ccontext.NameLength = cpu_to_le16(4); | |
1638 | ||
1639 | buf->dcontext.Timeout = 0; /* Should this be configurable by workload */ | |
1640 | buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT); | |
fa70b87c | 1641 | generate_random_uuid(buf->dcontext.CreateGuid); |
b56eae4d SF |
1642 | memcpy(pfid->create_guid, buf->dcontext.CreateGuid, 16); |
1643 | ||
1644 | /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DH2Q" */ | |
1645 | buf->Name[0] = 'D'; | |
1646 | buf->Name[1] = 'H'; | |
1647 | buf->Name[2] = '2'; | |
1648 | buf->Name[3] = 'Q'; | |
1649 | return buf; | |
1650 | } | |
1651 | ||
1652 | static struct create_durable_handle_reconnect_v2 * | |
1653 | create_reconnect_durable_v2_buf(struct cifs_fid *fid) | |
1654 | { | |
1655 | struct create_durable_handle_reconnect_v2 *buf; | |
1656 | ||
1657 | buf = kzalloc(sizeof(struct create_durable_handle_reconnect_v2), | |
1658 | GFP_KERNEL); | |
1659 | if (!buf) | |
1660 | return NULL; | |
1661 | ||
1662 | buf->ccontext.DataOffset = | |
1663 | cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2, | |
1664 | dcontext)); | |
1665 | buf->ccontext.DataLength = | |
1666 | cpu_to_le32(sizeof(struct durable_reconnect_context_v2)); | |
1667 | buf->ccontext.NameOffset = | |
1668 | cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2, | |
1669 | Name)); | |
1670 | buf->ccontext.NameLength = cpu_to_le16(4); | |
1671 | ||
1672 | buf->dcontext.Fid.PersistentFileId = fid->persistent_fid; | |
1673 | buf->dcontext.Fid.VolatileFileId = fid->volatile_fid; | |
1674 | buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT); | |
1675 | memcpy(buf->dcontext.CreateGuid, fid->create_guid, 16); | |
1676 | ||
1677 | /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2 is "DH2C" */ | |
1678 | buf->Name[0] = 'D'; | |
1679 | buf->Name[1] = 'H'; | |
1680 | buf->Name[2] = '2'; | |
1681 | buf->Name[3] = 'C'; | |
1682 | return buf; | |
1683 | } | |
1684 | ||
63eb3def | 1685 | static int |
b56eae4d SF |
1686 | add_durable_v2_context(struct kvec *iov, unsigned int *num_iovec, |
1687 | struct cifs_open_parms *oparms) | |
1688 | { | |
1689 | struct smb2_create_req *req = iov[0].iov_base; | |
1690 | unsigned int num = *num_iovec; | |
1691 | ||
1692 | iov[num].iov_base = create_durable_v2_buf(oparms->fid); | |
1693 | if (iov[num].iov_base == NULL) | |
1694 | return -ENOMEM; | |
1695 | iov[num].iov_len = sizeof(struct create_durable_v2); | |
1696 | if (!req->CreateContextsOffset) | |
1697 | req->CreateContextsOffset = | |
4f33bc35 | 1698 | cpu_to_le32(sizeof(struct smb2_create_req) + |
b56eae4d SF |
1699 | iov[1].iov_len); |
1700 | le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable_v2)); | |
b56eae4d SF |
1701 | *num_iovec = num + 1; |
1702 | return 0; | |
1703 | } | |
1704 | ||
1705 | static int | |
1706 | add_durable_reconnect_v2_context(struct kvec *iov, unsigned int *num_iovec, | |
9cbc0b73 | 1707 | struct cifs_open_parms *oparms) |
63eb3def PS |
1708 | { |
1709 | struct smb2_create_req *req = iov[0].iov_base; | |
1710 | unsigned int num = *num_iovec; | |
1711 | ||
b56eae4d SF |
1712 | /* indicate that we don't need to relock the file */ |
1713 | oparms->reconnect = false; | |
1714 | ||
1715 | iov[num].iov_base = create_reconnect_durable_v2_buf(oparms->fid); | |
1716 | if (iov[num].iov_base == NULL) | |
1717 | return -ENOMEM; | |
1718 | iov[num].iov_len = sizeof(struct create_durable_handle_reconnect_v2); | |
1719 | if (!req->CreateContextsOffset) | |
1720 | req->CreateContextsOffset = | |
4f33bc35 | 1721 | cpu_to_le32(sizeof(struct smb2_create_req) + |
b56eae4d SF |
1722 | iov[1].iov_len); |
1723 | le32_add_cpu(&req->CreateContextsLength, | |
1724 | sizeof(struct create_durable_handle_reconnect_v2)); | |
b56eae4d SF |
1725 | *num_iovec = num + 1; |
1726 | return 0; | |
1727 | } | |
1728 | ||
1729 | static int | |
1730 | add_durable_context(struct kvec *iov, unsigned int *num_iovec, | |
1731 | struct cifs_open_parms *oparms, bool use_persistent) | |
1732 | { | |
1733 | struct smb2_create_req *req = iov[0].iov_base; | |
1734 | unsigned int num = *num_iovec; | |
1735 | ||
1736 | if (use_persistent) { | |
1737 | if (oparms->reconnect) | |
1738 | return add_durable_reconnect_v2_context(iov, num_iovec, | |
1739 | oparms); | |
1740 | else | |
1741 | return add_durable_v2_context(iov, num_iovec, oparms); | |
1742 | } | |
1743 | ||
9cbc0b73 PS |
1744 | if (oparms->reconnect) { |
1745 | iov[num].iov_base = create_reconnect_durable_buf(oparms->fid); | |
1746 | /* indicate that we don't need to relock the file */ | |
1747 | oparms->reconnect = false; | |
1748 | } else | |
1749 | iov[num].iov_base = create_durable_buf(); | |
63eb3def PS |
1750 | if (iov[num].iov_base == NULL) |
1751 | return -ENOMEM; | |
1752 | iov[num].iov_len = sizeof(struct create_durable); | |
1753 | if (!req->CreateContextsOffset) | |
1754 | req->CreateContextsOffset = | |
4f33bc35 | 1755 | cpu_to_le32(sizeof(struct smb2_create_req) + |
63eb3def | 1756 | iov[1].iov_len); |
31f92e9a | 1757 | le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable)); |
63eb3def PS |
1758 | *num_iovec = num + 1; |
1759 | return 0; | |
1760 | } | |
1761 | ||
f0712928 AA |
1762 | static int |
1763 | alloc_path_with_tree_prefix(__le16 **out_path, int *out_size, int *out_len, | |
1764 | const char *treename, const __le16 *path) | |
1765 | { | |
1766 | int treename_len, path_len; | |
1767 | struct nls_table *cp; | |
1768 | const __le16 sep[] = {cpu_to_le16('\\'), cpu_to_le16(0x0000)}; | |
1769 | ||
1770 | /* | |
1771 | * skip leading "\\" | |
1772 | */ | |
1773 | treename_len = strlen(treename); | |
1774 | if (treename_len < 2 || !(treename[0] == '\\' && treename[1] == '\\')) | |
1775 | return -EINVAL; | |
1776 | ||
1777 | treename += 2; | |
1778 | treename_len -= 2; | |
1779 | ||
1780 | path_len = UniStrnlen((wchar_t *)path, PATH_MAX); | |
1781 | ||
1782 | /* | |
1783 | * make room for one path separator between the treename and | |
1784 | * path | |
1785 | */ | |
1786 | *out_len = treename_len + 1 + path_len; | |
1787 | ||
1788 | /* | |
1789 | * final path needs to be null-terminated UTF16 with a | |
1790 | * size aligned to 8 | |
1791 | */ | |
1792 | ||
1793 | *out_size = roundup((*out_len+1)*2, 8); | |
1794 | *out_path = kzalloc(*out_size, GFP_KERNEL); | |
1795 | if (!*out_path) | |
1796 | return -ENOMEM; | |
1797 | ||
1798 | cp = load_nls_default(); | |
1799 | cifs_strtoUTF16(*out_path, treename, treename_len, cp); | |
1800 | UniStrcat(*out_path, sep); | |
1801 | UniStrcat(*out_path, path); | |
1802 | unload_nls(cp); | |
1803 | ||
1804 | return 0; | |
1805 | } | |
1806 | ||
2503a0db | 1807 | int |
064f6047 | 1808 | SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path, |
b42bf888 | 1809 | __u8 *oplock, struct smb2_file_all_info *buf, |
91cb74f5 | 1810 | struct kvec *err_iov) |
2503a0db PS |
1811 | { |
1812 | struct smb2_create_req *req; | |
1813 | struct smb2_create_rsp *rsp; | |
1814 | struct TCP_Server_Info *server; | |
064f6047 | 1815 | struct cifs_tcon *tcon = oparms->tcon; |
2503a0db | 1816 | struct cifs_ses *ses = tcon->ses; |
63eb3def | 1817 | struct kvec iov[4]; |
bf2afee1 | 1818 | struct kvec rsp_iov = {NULL, 0}; |
2503a0db PS |
1819 | int resp_buftype; |
1820 | int uni_path_len; | |
b8c32dbb PS |
1821 | __le16 *copy_path = NULL; |
1822 | int copy_size; | |
2503a0db | 1823 | int rc = 0; |
da502f7d | 1824 | unsigned int n_iov = 2; |
ca81983f | 1825 | __u32 file_attributes = 0; |
663a9621 | 1826 | char *dhc_buf = NULL, *lc_buf = NULL; |
7fb8986e | 1827 | int flags = 0; |
4f33bc35 | 1828 | unsigned int total_len; |
2503a0db | 1829 | |
f96637be | 1830 | cifs_dbg(FYI, "create/open\n"); |
2503a0db PS |
1831 | |
1832 | if (ses && (ses->server)) | |
1833 | server = ses->server; | |
1834 | else | |
1835 | return -EIO; | |
1836 | ||
4f33bc35 RS |
1837 | rc = smb2_plain_req_init(SMB2_CREATE, tcon, (void **) &req, &total_len); |
1838 | ||
2503a0db PS |
1839 | if (rc) |
1840 | return rc; | |
1841 | ||
7fb8986e PS |
1842 | if (encryption_required(tcon)) |
1843 | flags |= CIFS_TRANSFORM_REQ; | |
1844 | ||
064f6047 | 1845 | if (oparms->create_options & CREATE_OPTION_READONLY) |
ca81983f | 1846 | file_attributes |= ATTR_READONLY; |
db8b631d SF |
1847 | if (oparms->create_options & CREATE_OPTION_SPECIAL) |
1848 | file_attributes |= ATTR_SYSTEM; | |
ca81983f | 1849 | |
2503a0db | 1850 | req->ImpersonationLevel = IL_IMPERSONATION; |
064f6047 | 1851 | req->DesiredAccess = cpu_to_le32(oparms->desired_access); |
2503a0db PS |
1852 | /* File attributes ignored on open (used in create though) */ |
1853 | req->FileAttributes = cpu_to_le32(file_attributes); | |
1854 | req->ShareAccess = FILE_SHARE_ALL_LE; | |
064f6047 PS |
1855 | req->CreateDisposition = cpu_to_le32(oparms->disposition); |
1856 | req->CreateOptions = cpu_to_le32(oparms->create_options & CREATE_OPTIONS_MASK); | |
2503a0db PS |
1857 | |
1858 | iov[0].iov_base = (char *)req; | |
59aa3718 | 1859 | /* -1 since last byte is buf[0] which is sent below (path) */ |
4f33bc35 | 1860 | iov[0].iov_len = total_len - 1; |
f0712928 | 1861 | |
4f33bc35 | 1862 | req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req)); |
f0712928 AA |
1863 | |
1864 | /* [MS-SMB2] 2.2.13 NameOffset: | |
1865 | * If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of | |
1866 | * the SMB2 header, the file name includes a prefix that will | |
1867 | * be processed during DFS name normalization as specified in | |
1868 | * section 3.3.5.9. Otherwise, the file name is relative to | |
1869 | * the share that is identified by the TreeId in the SMB2 | |
1870 | * header. | |
1871 | */ | |
1872 | if (tcon->share_flags & SHI1005_FLAGS_DFS) { | |
1873 | int name_len; | |
1874 | ||
4f33bc35 | 1875 | req->sync_hdr.Flags |= SMB2_FLAGS_DFS_OPERATIONS; |
f0712928 AA |
1876 | rc = alloc_path_with_tree_prefix(©_path, ©_size, |
1877 | &name_len, | |
1878 | tcon->treeName, path); | |
b7a73c84 RS |
1879 | if (rc) { |
1880 | cifs_small_buf_release(req); | |
f0712928 | 1881 | return rc; |
b7a73c84 | 1882 | } |
f0712928 | 1883 | req->NameLength = cpu_to_le16(name_len * 2); |
59aa3718 PS |
1884 | uni_path_len = copy_size; |
1885 | path = copy_path; | |
f0712928 AA |
1886 | } else { |
1887 | uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2; | |
1888 | /* MUST set path len (NameLength) to 0 opening root of share */ | |
1889 | req->NameLength = cpu_to_le16(uni_path_len - 2); | |
1890 | if (uni_path_len % 8 != 0) { | |
1891 | copy_size = roundup(uni_path_len, 8); | |
1892 | copy_path = kzalloc(copy_size, GFP_KERNEL); | |
b7a73c84 RS |
1893 | if (!copy_path) { |
1894 | cifs_small_buf_release(req); | |
f0712928 | 1895 | return -ENOMEM; |
b7a73c84 | 1896 | } |
f0712928 AA |
1897 | memcpy((char *)copy_path, (const char *)path, |
1898 | uni_path_len); | |
1899 | uni_path_len = copy_size; | |
1900 | path = copy_path; | |
1901 | } | |
2503a0db PS |
1902 | } |
1903 | ||
59aa3718 PS |
1904 | iov[1].iov_len = uni_path_len; |
1905 | iov[1].iov_base = path; | |
59aa3718 | 1906 | |
b8c32dbb PS |
1907 | if (!server->oplocks) |
1908 | *oplock = SMB2_OPLOCK_LEVEL_NONE; | |
1909 | ||
a41a28bd | 1910 | if (!(server->capabilities & SMB2_GLOBAL_CAP_LEASING) || |
b8c32dbb PS |
1911 | *oplock == SMB2_OPLOCK_LEVEL_NONE) |
1912 | req->RequestedOplockLevel = *oplock; | |
1913 | else { | |
da502f7d | 1914 | rc = add_lease_context(server, iov, &n_iov, oplock); |
d22cbfec | 1915 | if (rc) { |
b8c32dbb PS |
1916 | cifs_small_buf_release(req); |
1917 | kfree(copy_path); | |
d22cbfec | 1918 | return rc; |
b8c32dbb | 1919 | } |
da502f7d | 1920 | lc_buf = iov[n_iov-1].iov_base; |
b8c32dbb PS |
1921 | } |
1922 | ||
63eb3def PS |
1923 | if (*oplock == SMB2_OPLOCK_LEVEL_BATCH) { |
1924 | /* need to set Next field of lease context if we request it */ | |
a41a28bd | 1925 | if (server->capabilities & SMB2_GLOBAL_CAP_LEASING) { |
63eb3def | 1926 | struct create_context *ccontext = |
da502f7d | 1927 | (struct create_context *)iov[n_iov-1].iov_base; |
1c46943f | 1928 | ccontext->Next = |
a41a28bd | 1929 | cpu_to_le32(server->vals->create_lease_size); |
63eb3def | 1930 | } |
b56eae4d | 1931 | |
da502f7d | 1932 | rc = add_durable_context(iov, &n_iov, oparms, |
b56eae4d | 1933 | tcon->use_persistent); |
63eb3def PS |
1934 | if (rc) { |
1935 | cifs_small_buf_release(req); | |
1936 | kfree(copy_path); | |
663a9621 | 1937 | kfree(lc_buf); |
63eb3def PS |
1938 | return rc; |
1939 | } | |
da502f7d | 1940 | dhc_buf = iov[n_iov-1].iov_base; |
63eb3def PS |
1941 | } |
1942 | ||
4f33bc35 RS |
1943 | rc = smb2_send_recv(xid, ses, iov, n_iov, &resp_buftype, flags, |
1944 | &rsp_iov); | |
da502f7d PS |
1945 | cifs_small_buf_release(req); |
1946 | rsp = (struct smb2_create_rsp *)rsp_iov.iov_base; | |
2503a0db PS |
1947 | |
1948 | if (rc != 0) { | |
1949 | cifs_stats_fail_inc(tcon, SMB2_CREATE_HE); | |
91cb74f5 RS |
1950 | if (err_iov && rsp) { |
1951 | *err_iov = rsp_iov; | |
1952 | resp_buftype = CIFS_NO_BUFFER; | |
1953 | rsp = NULL; | |
1954 | } | |
2503a0db PS |
1955 | goto creat_exit; |
1956 | } | |
1957 | ||
064f6047 PS |
1958 | oparms->fid->persistent_fid = rsp->PersistentFileId; |
1959 | oparms->fid->volatile_fid = rsp->VolatileFileId; | |
f0df737e PS |
1960 | |
1961 | if (buf) { | |
1962 | memcpy(buf, &rsp->CreationTime, 32); | |
1963 | buf->AllocationSize = rsp->AllocationSize; | |
1964 | buf->EndOfFile = rsp->EndofFile; | |
1965 | buf->Attributes = rsp->FileAttributes; | |
1966 | buf->NumberOfLinks = cpu_to_le32(1); | |
1967 | buf->DeletePending = 0; | |
1968 | } | |
2e44b288 | 1969 | |
b8c32dbb | 1970 | if (rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE) |
42873b0a | 1971 | *oplock = parse_lease_state(server, rsp, &oparms->fid->epoch); |
b8c32dbb PS |
1972 | else |
1973 | *oplock = rsp->OplockLevel; | |
2503a0db | 1974 | creat_exit: |
b8c32dbb | 1975 | kfree(copy_path); |
663a9621 PS |
1976 | kfree(lc_buf); |
1977 | kfree(dhc_buf); | |
2503a0db PS |
1978 | free_rsp_buf(resp_buftype, rsp); |
1979 | return rc; | |
1980 | } | |
1981 | ||
4a72dafa SF |
1982 | /* |
1983 | * SMB2 IOCTL is used for both IOCTLs and FSCTLs | |
1984 | */ | |
1985 | int | |
1986 | SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, | |
63a83b86 | 1987 | u64 volatile_fid, u32 opcode, bool is_fsctl, |
51146625 AA |
1988 | char *in_data, u32 indatalen, |
1989 | char **out_data, u32 *plen /* returned data len */) | |
4a72dafa SF |
1990 | { |
1991 | struct smb2_ioctl_req *req; | |
1992 | struct smb2_ioctl_rsp *rsp; | |
31473fc4 | 1993 | struct smb2_sync_hdr *shdr; |
8e353106 | 1994 | struct cifs_ses *ses; |
4a72dafa | 1995 | struct kvec iov[2]; |
da502f7d | 1996 | struct kvec rsp_iov; |
4a72dafa | 1997 | int resp_buftype; |
da502f7d | 1998 | int n_iov; |
4a72dafa | 1999 | int rc = 0; |
7fb8986e | 2000 | int flags = 0; |
97754680 | 2001 | unsigned int total_len; |
4a72dafa SF |
2002 | |
2003 | cifs_dbg(FYI, "SMB2 IOCTL\n"); | |
2004 | ||
3d1a3745 SF |
2005 | if (out_data != NULL) |
2006 | *out_data = NULL; | |
2007 | ||
4a72dafa SF |
2008 | /* zero out returned data len, in case of error */ |
2009 | if (plen) | |
2010 | *plen = 0; | |
2011 | ||
8e353106 SF |
2012 | if (tcon) |
2013 | ses = tcon->ses; | |
2014 | else | |
2015 | return -EIO; | |
2016 | ||
68a6afa7 | 2017 | if (!ses || !(ses->server)) |
4a72dafa SF |
2018 | return -EIO; |
2019 | ||
97754680 | 2020 | rc = smb2_plain_req_init(SMB2_IOCTL, tcon, (void **) &req, &total_len); |
4a72dafa SF |
2021 | if (rc) |
2022 | return rc; | |
2023 | ||
7fb8986e PS |
2024 | if (encryption_required(tcon)) |
2025 | flags |= CIFS_TRANSFORM_REQ; | |
2026 | ||
4a72dafa SF |
2027 | req->CtlCode = cpu_to_le32(opcode); |
2028 | req->PersistentFileId = persistent_fid; | |
2029 | req->VolatileFileId = volatile_fid; | |
2030 | ||
2031 | if (indatalen) { | |
2032 | req->InputCount = cpu_to_le32(indatalen); | |
2033 | /* do not set InputOffset if no input data */ | |
2034 | req->InputOffset = | |
97754680 | 2035 | cpu_to_le32(offsetof(struct smb2_ioctl_req, Buffer)); |
4a72dafa SF |
2036 | iov[1].iov_base = in_data; |
2037 | iov[1].iov_len = indatalen; | |
da502f7d | 2038 | n_iov = 2; |
4a72dafa | 2039 | } else |
da502f7d | 2040 | n_iov = 1; |
4a72dafa SF |
2041 | |
2042 | req->OutputOffset = 0; | |
2043 | req->OutputCount = 0; /* MBZ */ | |
2044 | ||
2045 | /* | |
2046 | * Could increase MaxOutputResponse, but that would require more | |
2047 | * than one credit. Windows typically sets this smaller, but for some | |
2048 | * ioctls it may be useful to allow server to send more. No point | |
2049 | * limiting what the server can send as long as fits in one credit | |
7db0a6ef SF |
2050 | * Unfortunately - we can not handle more than CIFS_MAX_MSG_SIZE |
2051 | * (by default, note that it can be overridden to make max larger) | |
2052 | * in responses (except for read responses which can be bigger. | |
2053 | * We may want to bump this limit up | |
4a72dafa | 2054 | */ |
7db0a6ef | 2055 | req->MaxOutputResponse = cpu_to_le32(CIFSMaxBufSize); |
4a72dafa SF |
2056 | |
2057 | if (is_fsctl) | |
2058 | req->Flags = cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL); | |
2059 | else | |
2060 | req->Flags = 0; | |
2061 | ||
2062 | iov[0].iov_base = (char *)req; | |
4a72dafa | 2063 | |
7ff8d45c SF |
2064 | /* |
2065 | * If no input data, the size of ioctl struct in | |
2066 | * protocol spec still includes a 1 byte data buffer, | |
2067 | * but if input data passed to ioctl, we do not | |
2068 | * want to double count this, so we do not send | |
2069 | * the dummy one byte of data in iovec[0] if sending | |
97754680 | 2070 | * input data (in iovec[1]). |
7ff8d45c SF |
2071 | */ |
2072 | ||
2073 | if (indatalen) { | |
97754680 | 2074 | iov[0].iov_len = total_len - 1; |
7ff8d45c | 2075 | } else |
97754680 | 2076 | iov[0].iov_len = total_len; |
7ff8d45c | 2077 | |
4587eee0 SF |
2078 | /* validate negotiate request must be signed - see MS-SMB2 3.2.5.5 */ |
2079 | if (opcode == FSCTL_VALIDATE_NEGOTIATE_INFO) | |
97754680 | 2080 | req->sync_hdr.Flags |= SMB2_FLAGS_SIGNED; |
4a72dafa | 2081 | |
97754680 RS |
2082 | rc = smb2_send_recv(xid, ses, iov, n_iov, &resp_buftype, flags, |
2083 | &rsp_iov); | |
da502f7d PS |
2084 | cifs_small_buf_release(req); |
2085 | rsp = (struct smb2_ioctl_rsp *)rsp_iov.iov_base; | |
4a72dafa | 2086 | |
9bf0c9cd | 2087 | if ((rc != 0) && (rc != -EINVAL)) { |
8e353106 | 2088 | cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE); |
4a72dafa | 2089 | goto ioctl_exit; |
9bf0c9cd SF |
2090 | } else if (rc == -EINVAL) { |
2091 | if ((opcode != FSCTL_SRV_COPYCHUNK_WRITE) && | |
2092 | (opcode != FSCTL_SRV_COPYCHUNK)) { | |
8e353106 | 2093 | cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE); |
9bf0c9cd SF |
2094 | goto ioctl_exit; |
2095 | } | |
4a72dafa SF |
2096 | } |
2097 | ||
2098 | /* check if caller wants to look at return data or just return rc */ | |
2099 | if ((plen == NULL) || (out_data == NULL)) | |
2100 | goto ioctl_exit; | |
2101 | ||
2102 | *plen = le32_to_cpu(rsp->OutputCount); | |
2103 | ||
2104 | /* We check for obvious errors in the output buffer length and offset */ | |
2105 | if (*plen == 0) | |
2106 | goto ioctl_exit; /* server returned no data */ | |
2107 | else if (*plen > 0xFF00) { | |
2108 | cifs_dbg(VFS, "srv returned invalid ioctl length: %d\n", *plen); | |
2109 | *plen = 0; | |
2110 | rc = -EIO; | |
2111 | goto ioctl_exit; | |
2112 | } | |
2113 | ||
2114 | if (get_rfc1002_length(rsp) < le32_to_cpu(rsp->OutputOffset) + *plen) { | |
2115 | cifs_dbg(VFS, "Malformed ioctl resp: len %d offset %d\n", *plen, | |
2116 | le32_to_cpu(rsp->OutputOffset)); | |
2117 | *plen = 0; | |
2118 | rc = -EIO; | |
2119 | goto ioctl_exit; | |
2120 | } | |
2121 | ||
2122 | *out_data = kmalloc(*plen, GFP_KERNEL); | |
2123 | if (*out_data == NULL) { | |
2124 | rc = -ENOMEM; | |
2125 | goto ioctl_exit; | |
2126 | } | |
2127 | ||
31473fc4 PS |
2128 | shdr = get_sync_hdr(rsp); |
2129 | memcpy(*out_data, (char *)shdr + le32_to_cpu(rsp->OutputOffset), *plen); | |
4a72dafa SF |
2130 | ioctl_exit: |
2131 | free_rsp_buf(resp_buftype, rsp); | |
2132 | return rc; | |
2133 | } | |
2134 | ||
64a5cfa6 SF |
2135 | /* |
2136 | * Individual callers to ioctl worker function follow | |
2137 | */ | |
2138 | ||
2139 | int | |
2140 | SMB2_set_compression(const unsigned int xid, struct cifs_tcon *tcon, | |
2141 | u64 persistent_fid, u64 volatile_fid) | |
2142 | { | |
2143 | int rc; | |
64a5cfa6 SF |
2144 | struct compress_ioctl fsctl_input; |
2145 | char *ret_data = NULL; | |
2146 | ||
2147 | fsctl_input.CompressionState = | |
bc09d141 | 2148 | cpu_to_le16(COMPRESSION_FORMAT_DEFAULT); |
64a5cfa6 SF |
2149 | |
2150 | rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid, | |
2151 | FSCTL_SET_COMPRESSION, true /* is_fsctl */, | |
2152 | (char *)&fsctl_input /* data input */, | |
2153 | 2 /* in data len */, &ret_data /* out data */, NULL); | |
2154 | ||
2155 | cifs_dbg(FYI, "set compression rc %d\n", rc); | |
64a5cfa6 SF |
2156 | |
2157 | return rc; | |
2158 | } | |
2159 | ||
2503a0db PS |
2160 | int |
2161 | SMB2_close(const unsigned int xid, struct cifs_tcon *tcon, | |
2162 | u64 persistent_fid, u64 volatile_fid) | |
2163 | { | |
2164 | struct smb2_close_req *req; | |
2165 | struct smb2_close_rsp *rsp; | |
2503a0db PS |
2166 | struct cifs_ses *ses = tcon->ses; |
2167 | struct kvec iov[1]; | |
da502f7d | 2168 | struct kvec rsp_iov; |
2503a0db PS |
2169 | int resp_buftype; |
2170 | int rc = 0; | |
7fb8986e | 2171 | int flags = 0; |
afcccefd | 2172 | unsigned int total_len; |
2503a0db | 2173 | |
f96637be | 2174 | cifs_dbg(FYI, "Close\n"); |
2503a0db | 2175 | |
68a6afa7 | 2176 | if (!ses || !(ses->server)) |
2503a0db PS |
2177 | return -EIO; |
2178 | ||
afcccefd | 2179 | rc = smb2_plain_req_init(SMB2_CLOSE, tcon, (void **) &req, &total_len); |
2503a0db PS |
2180 | if (rc) |
2181 | return rc; | |
2182 | ||
7fb8986e PS |
2183 | if (encryption_required(tcon)) |
2184 | flags |= CIFS_TRANSFORM_REQ; | |
2185 | ||
2503a0db PS |
2186 | req->PersistentFileId = persistent_fid; |
2187 | req->VolatileFileId = volatile_fid; | |
2188 | ||
2189 | iov[0].iov_base = (char *)req; | |
afcccefd | 2190 | iov[0].iov_len = total_len; |
2503a0db | 2191 | |
afcccefd | 2192 | rc = smb2_send_recv(xid, ses, iov, 1, &resp_buftype, flags, &rsp_iov); |
da502f7d PS |
2193 | cifs_small_buf_release(req); |
2194 | rsp = (struct smb2_close_rsp *)rsp_iov.iov_base; | |
2503a0db PS |
2195 | |
2196 | if (rc != 0) { | |
d4a029d2 | 2197 | cifs_stats_fail_inc(tcon, SMB2_CLOSE_HE); |
2503a0db PS |
2198 | goto close_exit; |
2199 | } | |
2200 | ||
2503a0db PS |
2201 | /* BB FIXME - decode close response, update inode for caching */ |
2202 | ||
2203 | close_exit: | |
2204 | free_rsp_buf(resp_buftype, rsp); | |
2205 | return rc; | |
2206 | } | |
be4cb9e3 PS |
2207 | |
2208 | static int | |
c1596ff5 RS |
2209 | validate_iov(struct TCP_Server_Info *server, |
2210 | unsigned int offset, unsigned int buffer_length, | |
2211 | struct kvec *iov, unsigned int min_buf_size) | |
be4cb9e3 | 2212 | { |
c1596ff5 RS |
2213 | unsigned int smb_len = iov->iov_len; |
2214 | char *end_of_smb = smb_len + server->vals->header_preamble_size + (char *)iov->iov_base; | |
2215 | char *begin_of_buf = server->vals->header_preamble_size + offset + (char *)iov->iov_base; | |
be4cb9e3 PS |
2216 | char *end_of_buf = begin_of_buf + buffer_length; |
2217 | ||
2218 | ||
2219 | if (buffer_length < min_buf_size) { | |
f96637be JP |
2220 | cifs_dbg(VFS, "buffer length %d smaller than minimum size %d\n", |
2221 | buffer_length, min_buf_size); | |
be4cb9e3 PS |
2222 | return -EINVAL; |
2223 | } | |
2224 | ||
2225 | /* check if beyond RFC1001 maximum length */ | |
2226 | if ((smb_len > 0x7FFFFF) || (buffer_length > 0x7FFFFF)) { | |
f96637be JP |
2227 | cifs_dbg(VFS, "buffer length %d or smb length %d too large\n", |
2228 | buffer_length, smb_len); | |
be4cb9e3 PS |
2229 | return -EINVAL; |
2230 | } | |
2231 | ||
2232 | if ((begin_of_buf > end_of_smb) || (end_of_buf > end_of_smb)) { | |
f96637be | 2233 | cifs_dbg(VFS, "illegal server response, bad offset to data\n"); |
be4cb9e3 PS |
2234 | return -EINVAL; |
2235 | } | |
2236 | ||
2237 | return 0; | |
2238 | } | |
2239 | ||
2240 | /* | |
2241 | * If SMB buffer fields are valid, copy into temporary buffer to hold result. | |
2242 | * Caller must free buffer. | |
2243 | */ | |
2244 | static int | |
c1596ff5 RS |
2245 | validate_and_copy_iov(struct TCP_Server_Info *server, |
2246 | unsigned int offset, unsigned int buffer_length, | |
2247 | struct kvec *iov, unsigned int minbufsize, | |
be4cb9e3 | 2248 | char *data) |
be4cb9e3 | 2249 | { |
c1596ff5 | 2250 | char *begin_of_buf = server->vals->header_preamble_size + offset + (char *)(iov->iov_base); |
be4cb9e3 PS |
2251 | int rc; |
2252 | ||
2253 | if (!data) | |
2254 | return -EINVAL; | |
2255 | ||
c1596ff5 | 2256 | rc = validate_iov(server, offset, buffer_length, iov, minbufsize); |
be4cb9e3 PS |
2257 | if (rc) |
2258 | return rc; | |
2259 | ||
2260 | memcpy(data, begin_of_buf, buffer_length); | |
2261 | ||
2262 | return 0; | |
2263 | } | |
2264 | ||
f0df737e PS |
2265 | static int |
2266 | query_info(const unsigned int xid, struct cifs_tcon *tcon, | |
42c493c1 SP |
2267 | u64 persistent_fid, u64 volatile_fid, u8 info_class, u8 info_type, |
2268 | u32 additional_info, size_t output_len, size_t min_len, void **data, | |
2269 | u32 *dlen) | |
be4cb9e3 PS |
2270 | { |
2271 | struct smb2_query_info_req *req; | |
2272 | struct smb2_query_info_rsp *rsp = NULL; | |
2273 | struct kvec iov[2]; | |
da502f7d | 2274 | struct kvec rsp_iov; |
be4cb9e3 PS |
2275 | int rc = 0; |
2276 | int resp_buftype; | |
be4cb9e3 | 2277 | struct cifs_ses *ses = tcon->ses; |
7fb8986e | 2278 | int flags = 0; |
b2fb7fec | 2279 | unsigned int total_len; |
be4cb9e3 | 2280 | |
f96637be | 2281 | cifs_dbg(FYI, "Query Info\n"); |
be4cb9e3 | 2282 | |
68a6afa7 | 2283 | if (!ses || !(ses->server)) |
be4cb9e3 PS |
2284 | return -EIO; |
2285 | ||
b2fb7fec RS |
2286 | rc = smb2_plain_req_init(SMB2_QUERY_INFO, tcon, (void **) &req, |
2287 | &total_len); | |
be4cb9e3 PS |
2288 | if (rc) |
2289 | return rc; | |
2290 | ||
7fb8986e PS |
2291 | if (encryption_required(tcon)) |
2292 | flags |= CIFS_TRANSFORM_REQ; | |
2293 | ||
42c493c1 | 2294 | req->InfoType = info_type; |
f0df737e | 2295 | req->FileInfoClass = info_class; |
be4cb9e3 PS |
2296 | req->PersistentFileId = persistent_fid; |
2297 | req->VolatileFileId = volatile_fid; | |
42c493c1 | 2298 | req->AdditionalInformation = cpu_to_le32(additional_info); |
48923d2a AA |
2299 | |
2300 | /* | |
2301 | * We do not use the input buffer (do not send extra byte) | |
2302 | */ | |
2303 | req->InputBufferOffset = 0; | |
48923d2a | 2304 | |
f0df737e | 2305 | req->OutputBufferLength = cpu_to_le32(output_len); |
be4cb9e3 PS |
2306 | |
2307 | iov[0].iov_base = (char *)req; | |
b2fb7fec RS |
2308 | /* 1 for Buffer */ |
2309 | iov[0].iov_len = total_len - 1; | |
be4cb9e3 | 2310 | |
b2fb7fec | 2311 | rc = smb2_send_recv(xid, ses, iov, 1, &resp_buftype, flags, &rsp_iov); |
da502f7d PS |
2312 | cifs_small_buf_release(req); |
2313 | rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; | |
e5d04887 | 2314 | |
be4cb9e3 PS |
2315 | if (rc) { |
2316 | cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE); | |
2317 | goto qinf_exit; | |
2318 | } | |
2319 | ||
42c493c1 SP |
2320 | if (dlen) { |
2321 | *dlen = le32_to_cpu(rsp->OutputBufferLength); | |
2322 | if (!*data) { | |
2323 | *data = kmalloc(*dlen, GFP_KERNEL); | |
2324 | if (!*data) { | |
2325 | cifs_dbg(VFS, | |
2326 | "Error %d allocating memory for acl\n", | |
2327 | rc); | |
2328 | *dlen = 0; | |
2329 | goto qinf_exit; | |
2330 | } | |
2331 | } | |
2332 | } | |
2333 | ||
c1596ff5 RS |
2334 | rc = validate_and_copy_iov(ses->server, |
2335 | le16_to_cpu(rsp->OutputBufferOffset), | |
be4cb9e3 | 2336 | le32_to_cpu(rsp->OutputBufferLength), |
c1596ff5 | 2337 | &rsp_iov, min_len, *data); |
be4cb9e3 PS |
2338 | |
2339 | qinf_exit: | |
2340 | free_rsp_buf(resp_buftype, rsp); | |
2341 | return rc; | |
2342 | } | |
9094fad1 | 2343 | |
95907fea | 2344 | int SMB2_query_eas(const unsigned int xid, struct cifs_tcon *tcon, |
7cb3def4 RS |
2345 | u64 persistent_fid, u64 volatile_fid, |
2346 | int ea_buf_size, struct smb2_file_full_ea_info *data) | |
95907fea RS |
2347 | { |
2348 | return query_info(xid, tcon, persistent_fid, volatile_fid, | |
2349 | FILE_FULL_EA_INFORMATION, SMB2_O_INFO_FILE, 0, | |
7cb3def4 | 2350 | ea_buf_size, |
95907fea RS |
2351 | sizeof(struct smb2_file_full_ea_info), |
2352 | (void **)&data, | |
2353 | NULL); | |
2354 | } | |
2355 | ||
42c493c1 SP |
2356 | int SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon, |
2357 | u64 persistent_fid, u64 volatile_fid, struct smb2_file_all_info *data) | |
2358 | { | |
2359 | return query_info(xid, tcon, persistent_fid, volatile_fid, | |
2360 | FILE_ALL_INFORMATION, SMB2_O_INFO_FILE, 0, | |
2361 | sizeof(struct smb2_file_all_info) + PATH_MAX * 2, | |
2362 | sizeof(struct smb2_file_all_info), (void **)&data, | |
2363 | NULL); | |
2364 | } | |
2365 | ||
f0df737e | 2366 | int |
42c493c1 | 2367 | SMB2_query_acl(const unsigned int xid, struct cifs_tcon *tcon, |
f0df737e | 2368 | u64 persistent_fid, u64 volatile_fid, |
42c493c1 | 2369 | void **data, u32 *plen) |
f0df737e | 2370 | { |
42c493c1 SP |
2371 | __u32 additional_info = OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO; |
2372 | *plen = 0; | |
2373 | ||
f0df737e | 2374 | return query_info(xid, tcon, persistent_fid, volatile_fid, |
42c493c1 SP |
2375 | 0, SMB2_O_INFO_SECURITY, additional_info, |
2376 | SMB2_MAX_BUFFER_SIZE, | |
2377 | sizeof(struct smb2_file_all_info), data, plen); | |
f0df737e PS |
2378 | } |
2379 | ||
2380 | int | |
2381 | SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon, | |
2382 | u64 persistent_fid, u64 volatile_fid, __le64 *uniqueid) | |
2383 | { | |
2384 | return query_info(xid, tcon, persistent_fid, volatile_fid, | |
42c493c1 SP |
2385 | FILE_INTERNAL_INFORMATION, SMB2_O_INFO_FILE, 0, |
2386 | sizeof(struct smb2_file_internal_info), | |
f0df737e | 2387 | sizeof(struct smb2_file_internal_info), |
42c493c1 | 2388 | (void **)&uniqueid, NULL); |
f0df737e PS |
2389 | } |
2390 | ||
9094fad1 PS |
2391 | /* |
2392 | * This is a no-op for now. We're not really interested in the reply, but | |
2393 | * rather in the fact that the server sent one and that server->lstrp | |
2394 | * gets updated. | |
2395 | * | |
2396 | * FIXME: maybe we should consider checking that the reply matches request? | |
2397 | */ | |
2398 | static void | |
2399 | smb2_echo_callback(struct mid_q_entry *mid) | |
2400 | { | |
2401 | struct TCP_Server_Info *server = mid->callback_data; | |
31473fc4 | 2402 | struct smb2_echo_rsp *rsp = (struct smb2_echo_rsp *)mid->resp_buf; |
9094fad1 PS |
2403 | unsigned int credits_received = 1; |
2404 | ||
2405 | if (mid->mid_state == MID_RESPONSE_RECEIVED) | |
31473fc4 | 2406 | credits_received = le16_to_cpu(rsp->hdr.sync_hdr.CreditRequest); |
9094fad1 PS |
2407 | |
2408 | DeleteMidQEntry(mid); | |
2409 | add_credits(server, credits_received, CIFS_ECHO_OP); | |
2410 | } | |
2411 | ||
53e0e11e PS |
2412 | void smb2_reconnect_server(struct work_struct *work) |
2413 | { | |
2414 | struct TCP_Server_Info *server = container_of(work, | |
2415 | struct TCP_Server_Info, reconnect.work); | |
2416 | struct cifs_ses *ses; | |
2417 | struct cifs_tcon *tcon, *tcon2; | |
2418 | struct list_head tmp_list; | |
2419 | int tcon_exist = false; | |
18ea4311 GP |
2420 | int rc; |
2421 | int resched = false; | |
2422 | ||
53e0e11e PS |
2423 | |
2424 | /* Prevent simultaneous reconnects that can corrupt tcon->rlist list */ | |
2425 | mutex_lock(&server->reconnect_mutex); | |
2426 | ||
2427 | INIT_LIST_HEAD(&tmp_list); | |
2428 | cifs_dbg(FYI, "Need negotiate, reconnecting tcons\n"); | |
2429 | ||
2430 | spin_lock(&cifs_tcp_ses_lock); | |
2431 | list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) { | |
2432 | list_for_each_entry(tcon, &ses->tcon_list, tcon_list) { | |
96a988ff | 2433 | if (tcon->need_reconnect || tcon->need_reopen_files) { |
53e0e11e PS |
2434 | tcon->tc_count++; |
2435 | list_add_tail(&tcon->rlist, &tmp_list); | |
2436 | tcon_exist = true; | |
2437 | } | |
2438 | } | |
b327a717 AA |
2439 | if (ses->tcon_ipc && ses->tcon_ipc->need_reconnect) { |
2440 | list_add_tail(&ses->tcon_ipc->rlist, &tmp_list); | |
2441 | tcon_exist = true; | |
2442 | } | |
53e0e11e PS |
2443 | } |
2444 | /* | |
2445 | * Get the reference to server struct to be sure that the last call of | |
2446 | * cifs_put_tcon() in the loop below won't release the server pointer. | |
2447 | */ | |
2448 | if (tcon_exist) | |
2449 | server->srv_count++; | |
2450 | ||
2451 | spin_unlock(&cifs_tcp_ses_lock); | |
2452 | ||
2453 | list_for_each_entry_safe(tcon, tcon2, &tmp_list, rlist) { | |
18ea4311 GP |
2454 | rc = smb2_reconnect(SMB2_INTERNAL_CMD, tcon); |
2455 | if (!rc) | |
96a988ff | 2456 | cifs_reopen_persistent_handles(tcon); |
18ea4311 GP |
2457 | else |
2458 | resched = true; | |
53e0e11e PS |
2459 | list_del_init(&tcon->rlist); |
2460 | cifs_put_tcon(tcon); | |
2461 | } | |
2462 | ||
2463 | cifs_dbg(FYI, "Reconnecting tcons finished\n"); | |
18ea4311 GP |
2464 | if (resched) |
2465 | queue_delayed_work(cifsiod_wq, &server->reconnect, 2 * HZ); | |
53e0e11e PS |
2466 | mutex_unlock(&server->reconnect_mutex); |
2467 | ||
2468 | /* now we can safely release srv struct */ | |
2469 | if (tcon_exist) | |
2470 | cifs_put_tcp_session(server, 1); | |
2471 | } | |
2472 | ||
9094fad1 PS |
2473 | int |
2474 | SMB2_echo(struct TCP_Server_Info *server) | |
2475 | { | |
2476 | struct smb2_echo_req *req; | |
2477 | int rc = 0; | |
738f9de5 PS |
2478 | struct kvec iov[2]; |
2479 | struct smb_rqst rqst = { .rq_iov = iov, | |
2480 | .rq_nvec = 2 }; | |
7f7ae759 RS |
2481 | unsigned int total_len; |
2482 | __be32 rfc1002_marker; | |
9094fad1 | 2483 | |
f96637be | 2484 | cifs_dbg(FYI, "In echo request\n"); |
9094fad1 | 2485 | |
4fcd1813 | 2486 | if (server->tcpStatus == CifsNeedNegotiate) { |
53e0e11e PS |
2487 | /* No need to send echo on newly established connections */ |
2488 | queue_delayed_work(cifsiod_wq, &server->reconnect, 0); | |
2489 | return rc; | |
4fcd1813 SF |
2490 | } |
2491 | ||
7f7ae759 | 2492 | rc = smb2_plain_req_init(SMB2_ECHO, NULL, (void **)&req, &total_len); |
9094fad1 PS |
2493 | if (rc) |
2494 | return rc; | |
2495 | ||
7f7ae759 | 2496 | req->sync_hdr.CreditRequest = cpu_to_le16(1); |
9094fad1 | 2497 | |
738f9de5 | 2498 | iov[0].iov_len = 4; |
7f7ae759 RS |
2499 | rfc1002_marker = cpu_to_be32(total_len); |
2500 | iov[0].iov_base = &rfc1002_marker; | |
2501 | iov[1].iov_len = total_len; | |
2502 | iov[1].iov_base = (char *)req; | |
9094fad1 | 2503 | |
9b7c18a2 PS |
2504 | rc = cifs_call_async(server, &rqst, NULL, smb2_echo_callback, NULL, |
2505 | server, CIFS_ECHO_OP); | |
9094fad1 | 2506 | if (rc) |
f96637be | 2507 | cifs_dbg(FYI, "Echo request failed: %d\n", rc); |
9094fad1 PS |
2508 | |
2509 | cifs_small_buf_release(req); | |
2510 | return rc; | |
2511 | } | |
7a5cfb19 PS |
2512 | |
2513 | int | |
2514 | SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, | |
2515 | u64 volatile_fid) | |
2516 | { | |
2517 | struct smb2_flush_req *req; | |
7a5cfb19 PS |
2518 | struct cifs_ses *ses = tcon->ses; |
2519 | struct kvec iov[1]; | |
da502f7d | 2520 | struct kvec rsp_iov; |
7a5cfb19 PS |
2521 | int resp_buftype; |
2522 | int rc = 0; | |
7fb8986e | 2523 | int flags = 0; |
1f444e4c | 2524 | unsigned int total_len; |
7a5cfb19 | 2525 | |
f96637be | 2526 | cifs_dbg(FYI, "Flush\n"); |
7a5cfb19 | 2527 | |
68a6afa7 | 2528 | if (!ses || !(ses->server)) |
7a5cfb19 PS |
2529 | return -EIO; |
2530 | ||
1f444e4c | 2531 | rc = smb2_plain_req_init(SMB2_FLUSH, tcon, (void **) &req, &total_len); |
7a5cfb19 PS |
2532 | if (rc) |
2533 | return rc; | |
2534 | ||
7fb8986e PS |
2535 | if (encryption_required(tcon)) |
2536 | flags |= CIFS_TRANSFORM_REQ; | |
2537 | ||
7a5cfb19 PS |
2538 | req->PersistentFileId = persistent_fid; |
2539 | req->VolatileFileId = volatile_fid; | |
2540 | ||
2541 | iov[0].iov_base = (char *)req; | |
1f444e4c | 2542 | iov[0].iov_len = total_len; |
7a5cfb19 | 2543 | |
1f444e4c | 2544 | rc = smb2_send_recv(xid, ses, iov, 1, &resp_buftype, flags, &rsp_iov); |
da502f7d | 2545 | cifs_small_buf_release(req); |
7a5cfb19 | 2546 | |
dfebe400 | 2547 | if (rc != 0) |
7a5cfb19 PS |
2548 | cifs_stats_fail_inc(tcon, SMB2_FLUSH_HE); |
2549 | ||
da502f7d | 2550 | free_rsp_buf(resp_buftype, rsp_iov.iov_base); |
7a5cfb19 PS |
2551 | return rc; |
2552 | } | |
09a4707e PS |
2553 | |
2554 | /* | |
2555 | * To form a chain of read requests, any read requests after the first should | |
2556 | * have the end_of_chain boolean set to true. | |
2557 | */ | |
2558 | static int | |
738f9de5 | 2559 | smb2_new_read_req(void **buf, unsigned int *total_len, |
2dabfd5b LL |
2560 | struct cifs_io_parms *io_parms, struct cifs_readdata *rdata, |
2561 | unsigned int remaining_bytes, int request_type) | |
09a4707e PS |
2562 | { |
2563 | int rc = -EACCES; | |
b8f57ee8 | 2564 | struct smb2_read_plain_req *req = NULL; |
31473fc4 | 2565 | struct smb2_sync_hdr *shdr; |
2dabfd5b | 2566 | struct TCP_Server_Info *server; |
09a4707e | 2567 | |
b8f57ee8 PS |
2568 | rc = smb2_plain_req_init(SMB2_READ, io_parms->tcon, (void **) &req, |
2569 | total_len); | |
09a4707e PS |
2570 | if (rc) |
2571 | return rc; | |
2dabfd5b LL |
2572 | |
2573 | server = io_parms->tcon->ses->server; | |
2574 | if (server == NULL) | |
09a4707e PS |
2575 | return -ECONNABORTED; |
2576 | ||
b8f57ee8 | 2577 | shdr = &req->sync_hdr; |
31473fc4 | 2578 | shdr->ProcessId = cpu_to_le32(io_parms->pid); |
09a4707e PS |
2579 | |
2580 | req->PersistentFileId = io_parms->persistent_fid; | |
2581 | req->VolatileFileId = io_parms->volatile_fid; | |
2582 | req->ReadChannelInfoOffset = 0; /* reserved */ | |
2583 | req->ReadChannelInfoLength = 0; /* reserved */ | |
2584 | req->Channel = 0; /* reserved */ | |
2585 | req->MinimumCount = 0; | |
2586 | req->Length = cpu_to_le32(io_parms->length); | |
2587 | req->Offset = cpu_to_le64(io_parms->offset); | |
bd3dcc6a LL |
2588 | #ifdef CONFIG_CIFS_SMB_DIRECT |
2589 | /* | |
2590 | * If we want to do a RDMA write, fill in and append | |
2591 | * smbd_buffer_descriptor_v1 to the end of read request | |
2592 | */ | |
2593 | if (server->rdma && rdata && | |
2594 | rdata->bytes >= server->smbd_conn->rdma_readwrite_threshold) { | |
2595 | ||
2596 | struct smbd_buffer_descriptor_v1 *v1; | |
2597 | bool need_invalidate = | |
2598 | io_parms->tcon->ses->server->dialect == SMB30_PROT_ID; | |
2599 | ||
2600 | rdata->mr = smbd_register_mr( | |
2601 | server->smbd_conn, rdata->pages, | |
2602 | rdata->nr_pages, rdata->tailsz, | |
2603 | true, need_invalidate); | |
2604 | if (!rdata->mr) | |
2605 | return -ENOBUFS; | |
2606 | ||
2607 | req->Channel = SMB2_CHANNEL_RDMA_V1_INVALIDATE; | |
2608 | if (need_invalidate) | |
2609 | req->Channel = SMB2_CHANNEL_RDMA_V1; | |
2610 | req->ReadChannelInfoOffset = | |
2026b06e | 2611 | cpu_to_le16(offsetof(struct smb2_read_plain_req, Buffer)); |
bd3dcc6a | 2612 | req->ReadChannelInfoLength = |
2026b06e | 2613 | cpu_to_le16(sizeof(struct smbd_buffer_descriptor_v1)); |
bd3dcc6a | 2614 | v1 = (struct smbd_buffer_descriptor_v1 *) &req->Buffer[0]; |
2026b06e SF |
2615 | v1->offset = cpu_to_le64(rdata->mr->mr->iova); |
2616 | v1->token = cpu_to_le32(rdata->mr->mr->rkey); | |
2617 | v1->length = cpu_to_le32(rdata->mr->mr->length); | |
bd3dcc6a LL |
2618 | |
2619 | *total_len += sizeof(*v1) - 1; | |
2620 | } | |
2621 | #endif | |
09a4707e PS |
2622 | if (request_type & CHAINED_REQUEST) { |
2623 | if (!(request_type & END_OF_CHAIN)) { | |
b8f57ee8 PS |
2624 | /* next 8-byte aligned request */ |
2625 | *total_len = DIV_ROUND_UP(*total_len, 8) * 8; | |
2626 | shdr->NextCommand = cpu_to_le32(*total_len); | |
09a4707e | 2627 | } else /* END_OF_CHAIN */ |
31473fc4 | 2628 | shdr->NextCommand = 0; |
09a4707e | 2629 | if (request_type & RELATED_REQUEST) { |
31473fc4 | 2630 | shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS; |
09a4707e PS |
2631 | /* |
2632 | * Related requests use info from previous read request | |
2633 | * in chain. | |
2634 | */ | |
31473fc4 PS |
2635 | shdr->SessionId = 0xFFFFFFFF; |
2636 | shdr->TreeId = 0xFFFFFFFF; | |
09a4707e PS |
2637 | req->PersistentFileId = 0xFFFFFFFF; |
2638 | req->VolatileFileId = 0xFFFFFFFF; | |
2639 | } | |
2640 | } | |
2641 | if (remaining_bytes > io_parms->length) | |
2642 | req->RemainingBytes = cpu_to_le32(remaining_bytes); | |
2643 | else | |
2644 | req->RemainingBytes = 0; | |
2645 | ||
738f9de5 | 2646 | *buf = req; |
09a4707e PS |
2647 | return rc; |
2648 | } | |
2649 | ||
2650 | static void | |
2651 | smb2_readv_callback(struct mid_q_entry *mid) | |
2652 | { | |
2653 | struct cifs_readdata *rdata = mid->callback_data; | |
2654 | struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink); | |
2655 | struct TCP_Server_Info *server = tcon->ses->server; | |
738f9de5 PS |
2656 | struct smb2_sync_hdr *shdr = |
2657 | (struct smb2_sync_hdr *)rdata->iov[1].iov_base; | |
09a4707e | 2658 | unsigned int credits_received = 1; |
738f9de5 PS |
2659 | struct smb_rqst rqst = { .rq_iov = rdata->iov, |
2660 | .rq_nvec = 2, | |
8321fec4 JL |
2661 | .rq_pages = rdata->pages, |
2662 | .rq_npages = rdata->nr_pages, | |
2663 | .rq_pagesz = rdata->pagesz, | |
2664 | .rq_tailsz = rdata->tailsz }; | |
09a4707e | 2665 | |
f96637be JP |
2666 | cifs_dbg(FYI, "%s: mid=%llu state=%d result=%d bytes=%u\n", |
2667 | __func__, mid->mid, mid->mid_state, rdata->result, | |
2668 | rdata->bytes); | |
09a4707e PS |
2669 | |
2670 | switch (mid->mid_state) { | |
2671 | case MID_RESPONSE_RECEIVED: | |
31473fc4 | 2672 | credits_received = le16_to_cpu(shdr->CreditRequest); |
09a4707e | 2673 | /* result already set, check signature */ |
4326ed2f | 2674 | if (server->sign && !mid->decrypted) { |
3c1bf7e4 PS |
2675 | int rc; |
2676 | ||
0b688cfc | 2677 | rc = smb2_verify_signature(&rqst, server); |
3c1bf7e4 | 2678 | if (rc) |
f96637be JP |
2679 | cifs_dbg(VFS, "SMB signature verification returned error = %d\n", |
2680 | rc); | |
3c1bf7e4 | 2681 | } |
09a4707e | 2682 | /* FIXME: should this be counted toward the initiating task? */ |
34a54d61 PS |
2683 | task_io_account_read(rdata->got_bytes); |
2684 | cifs_stats_bytes_read(tcon, rdata->got_bytes); | |
09a4707e PS |
2685 | break; |
2686 | case MID_REQUEST_SUBMITTED: | |
2687 | case MID_RETRY_NEEDED: | |
2688 | rdata->result = -EAGAIN; | |
d913ed17 PS |
2689 | if (server->sign && rdata->got_bytes) |
2690 | /* reset bytes number since we can not check a sign */ | |
2691 | rdata->got_bytes = 0; | |
2692 | /* FIXME: should this be counted toward the initiating task? */ | |
2693 | task_io_account_read(rdata->got_bytes); | |
2694 | cifs_stats_bytes_read(tcon, rdata->got_bytes); | |
09a4707e PS |
2695 | break; |
2696 | default: | |
2697 | if (rdata->result != -ENODATA) | |
2698 | rdata->result = -EIO; | |
2699 | } | |
bd3dcc6a LL |
2700 | #ifdef CONFIG_CIFS_SMB_DIRECT |
2701 | /* | |
2702 | * If this rdata has a memmory registered, the MR can be freed | |
2703 | * MR needs to be freed as soon as I/O finishes to prevent deadlock | |
2704 | * because they have limited number and are used for future I/Os | |
2705 | */ | |
2706 | if (rdata->mr) { | |
2707 | smbd_deregister_mr(rdata->mr); | |
2708 | rdata->mr = NULL; | |
2709 | } | |
2710 | #endif | |
09a4707e PS |
2711 | if (rdata->result) |
2712 | cifs_stats_fail_inc(tcon, SMB2_READ_HE); | |
2713 | ||
2714 | queue_work(cifsiod_wq, &rdata->work); | |
2715 | DeleteMidQEntry(mid); | |
2716 | add_credits(server, credits_received, 0); | |
2717 | } | |
2718 | ||
738f9de5 | 2719 | /* smb2_async_readv - send an async read, and set up mid to handle result */ |
09a4707e PS |
2720 | int |
2721 | smb2_async_readv(struct cifs_readdata *rdata) | |
2722 | { | |
bed9da02 | 2723 | int rc, flags = 0; |
31473fc4 PS |
2724 | char *buf; |
2725 | struct smb2_sync_hdr *shdr; | |
09a4707e | 2726 | struct cifs_io_parms io_parms; |
738f9de5 PS |
2727 | struct smb_rqst rqst = { .rq_iov = rdata->iov, |
2728 | .rq_nvec = 2 }; | |
bed9da02 | 2729 | struct TCP_Server_Info *server; |
738f9de5 | 2730 | unsigned int total_len; |
b8f57ee8 | 2731 | __be32 req_len; |
09a4707e | 2732 | |
f96637be JP |
2733 | cifs_dbg(FYI, "%s: offset=%llu bytes=%u\n", |
2734 | __func__, rdata->offset, rdata->bytes); | |
09a4707e PS |
2735 | |
2736 | io_parms.tcon = tlink_tcon(rdata->cfile->tlink); | |
2737 | io_parms.offset = rdata->offset; | |
2738 | io_parms.length = rdata->bytes; | |
2739 | io_parms.persistent_fid = rdata->cfile->fid.persistent_fid; | |
2740 | io_parms.volatile_fid = rdata->cfile->fid.volatile_fid; | |
2741 | io_parms.pid = rdata->pid; | |
bed9da02 PS |
2742 | |
2743 | server = io_parms.tcon->ses->server; | |
2744 | ||
2dabfd5b LL |
2745 | rc = smb2_new_read_req( |
2746 | (void **) &buf, &total_len, &io_parms, rdata, 0, 0); | |
bed9da02 PS |
2747 | if (rc) { |
2748 | if (rc == -EAGAIN && rdata->credits) { | |
2749 | /* credits was reset by reconnect */ | |
2750 | rdata->credits = 0; | |
2751 | /* reduce in_flight value since we won't send the req */ | |
2752 | spin_lock(&server->req_lock); | |
2753 | server->in_flight--; | |
2754 | spin_unlock(&server->req_lock); | |
2755 | } | |
09a4707e | 2756 | return rc; |
bed9da02 | 2757 | } |
09a4707e | 2758 | |
7fb8986e PS |
2759 | if (encryption_required(io_parms.tcon)) |
2760 | flags |= CIFS_TRANSFORM_REQ; | |
2761 | ||
b8f57ee8 PS |
2762 | req_len = cpu_to_be32(total_len); |
2763 | ||
2764 | rdata->iov[0].iov_base = &req_len; | |
2765 | rdata->iov[0].iov_len = sizeof(__be32); | |
2766 | rdata->iov[1].iov_base = buf; | |
2767 | rdata->iov[1].iov_len = total_len; | |
2768 | ||
2769 | shdr = (struct smb2_sync_hdr *)buf; | |
09a4707e | 2770 | |
bed9da02 | 2771 | if (rdata->credits) { |
31473fc4 | 2772 | shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(rdata->bytes, |
bed9da02 | 2773 | SMB2_MAX_BUFFER_SIZE)); |
31473fc4 | 2774 | shdr->CreditRequest = shdr->CreditCharge; |
bed9da02 PS |
2775 | spin_lock(&server->req_lock); |
2776 | server->credits += rdata->credits - | |
31473fc4 | 2777 | le16_to_cpu(shdr->CreditCharge); |
bed9da02 PS |
2778 | spin_unlock(&server->req_lock); |
2779 | wake_up(&server->request_q); | |
7fb8986e | 2780 | flags |= CIFS_HAS_CREDITS; |
bed9da02 PS |
2781 | } |
2782 | ||
09a4707e | 2783 | kref_get(&rdata->refcount); |
fec344e3 | 2784 | rc = cifs_call_async(io_parms.tcon->ses->server, &rqst, |
09a4707e | 2785 | cifs_readv_receive, smb2_readv_callback, |
4326ed2f | 2786 | smb3_handle_read_data, rdata, flags); |
e5d04887 | 2787 | if (rc) { |
09a4707e | 2788 | kref_put(&rdata->refcount, cifs_readdata_release); |
e5d04887 PS |
2789 | cifs_stats_fail_inc(io_parms.tcon, SMB2_READ_HE); |
2790 | } | |
09a4707e PS |
2791 | |
2792 | cifs_small_buf_release(buf); | |
2793 | return rc; | |
2794 | } | |
33319141 | 2795 | |
d8e05039 PS |
2796 | int |
2797 | SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms, | |
2798 | unsigned int *nbytes, char **buf, int *buf_type) | |
2799 | { | |
2800 | int resp_buftype, rc = -EACCES; | |
b8f57ee8 | 2801 | struct smb2_read_plain_req *req = NULL; |
d8e05039 | 2802 | struct smb2_read_rsp *rsp = NULL; |
31473fc4 | 2803 | struct smb2_sync_hdr *shdr; |
f5688a6d | 2804 | struct kvec iov[1]; |
da502f7d | 2805 | struct kvec rsp_iov; |
738f9de5 | 2806 | unsigned int total_len; |
7fb8986e PS |
2807 | int flags = CIFS_LOG_ERROR; |
2808 | struct cifs_ses *ses = io_parms->tcon->ses; | |
d8e05039 PS |
2809 | |
2810 | *nbytes = 0; | |
2dabfd5b | 2811 | rc = smb2_new_read_req((void **)&req, &total_len, io_parms, NULL, 0, 0); |
d8e05039 PS |
2812 | if (rc) |
2813 | return rc; | |
2814 | ||
7fb8986e PS |
2815 | if (encryption_required(io_parms->tcon)) |
2816 | flags |= CIFS_TRANSFORM_REQ; | |
2817 | ||
f5688a6d RS |
2818 | iov[0].iov_base = (char *)req; |
2819 | iov[0].iov_len = total_len; | |
b8f57ee8 | 2820 | |
f5688a6d | 2821 | rc = smb2_send_recv(xid, ses, iov, 1, &resp_buftype, flags, &rsp_iov); |
b8f57ee8 | 2822 | cifs_small_buf_release(req); |
d8e05039 | 2823 | |
da502f7d | 2824 | rsp = (struct smb2_read_rsp *)rsp_iov.iov_base; |
d8e05039 | 2825 | |
a821df3f RS |
2826 | if (rc) { |
2827 | if (rc != -ENODATA) { | |
2828 | cifs_stats_fail_inc(io_parms->tcon, SMB2_READ_HE); | |
2829 | cifs_dbg(VFS, "Send error in read = %d\n", rc); | |
2830 | } | |
da502f7d | 2831 | free_rsp_buf(resp_buftype, rsp_iov.iov_base); |
a821df3f | 2832 | return rc == -ENODATA ? 0 : rc; |
d8e05039 PS |
2833 | } |
2834 | ||
a821df3f RS |
2835 | *nbytes = le32_to_cpu(rsp->DataLength); |
2836 | if ((*nbytes > CIFS_MAX_MSGSIZE) || | |
2837 | (*nbytes > io_parms->length)) { | |
2838 | cifs_dbg(FYI, "bad length %d for count %d\n", | |
2839 | *nbytes, io_parms->length); | |
2840 | rc = -EIO; | |
2841 | *nbytes = 0; | |
d8e05039 PS |
2842 | } |
2843 | ||
a821df3f RS |
2844 | shdr = get_sync_hdr(rsp); |
2845 | ||
d8e05039 | 2846 | if (*buf) { |
31473fc4 | 2847 | memcpy(*buf, (char *)shdr + rsp->DataOffset, *nbytes); |
da502f7d | 2848 | free_rsp_buf(resp_buftype, rsp_iov.iov_base); |
d8e05039 | 2849 | } else if (resp_buftype != CIFS_NO_BUFFER) { |
da502f7d | 2850 | *buf = rsp_iov.iov_base; |
d8e05039 PS |
2851 | if (resp_buftype == CIFS_SMALL_BUFFER) |
2852 | *buf_type = CIFS_SMALL_BUFFER; | |
2853 | else if (resp_buftype == CIFS_LARGE_BUFFER) | |
2854 | *buf_type = CIFS_LARGE_BUFFER; | |
2855 | } | |
2856 | return rc; | |
2857 | } | |
2858 | ||
33319141 PS |
2859 | /* |
2860 | * Check the mid_state and signature on received buffer (if any), and queue the | |
2861 | * workqueue completion task. | |
2862 | */ | |
2863 | static void | |
2864 | smb2_writev_callback(struct mid_q_entry *mid) | |
2865 | { | |
2866 | struct cifs_writedata *wdata = mid->callback_data; | |
2867 | struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink); | |
2868 | unsigned int written; | |
2869 | struct smb2_write_rsp *rsp = (struct smb2_write_rsp *)mid->resp_buf; | |
2870 | unsigned int credits_received = 1; | |
2871 | ||
2872 | switch (mid->mid_state) { | |
2873 | case MID_RESPONSE_RECEIVED: | |
31473fc4 | 2874 | credits_received = le16_to_cpu(rsp->hdr.sync_hdr.CreditRequest); |
33319141 PS |
2875 | wdata->result = smb2_check_receive(mid, tcon->ses->server, 0); |
2876 | if (wdata->result != 0) | |
2877 | break; | |
2878 | ||
2879 | written = le32_to_cpu(rsp->DataLength); | |
2880 | /* | |
2881 | * Mask off high 16 bits when bytes written as returned | |
2882 | * by the server is greater than bytes requested by the | |
2883 | * client. OS/2 servers are known to set incorrect | |
2884 | * CountHigh values. | |
2885 | */ | |
2886 | if (written > wdata->bytes) | |
2887 | written &= 0xFFFF; | |
2888 | ||
2889 | if (written < wdata->bytes) | |
2890 | wdata->result = -ENOSPC; | |
2891 | else | |
2892 | wdata->bytes = written; | |
2893 | break; | |
2894 | case MID_REQUEST_SUBMITTED: | |
2895 | case MID_RETRY_NEEDED: | |
2896 | wdata->result = -EAGAIN; | |
2897 | break; | |
2898 | default: | |
2899 | wdata->result = -EIO; | |
2900 | break; | |
2901 | } | |
db223a59 LL |
2902 | #ifdef CONFIG_CIFS_SMB_DIRECT |
2903 | /* | |
2904 | * If this wdata has a memory registered, the MR can be freed | |
2905 | * The number of MRs available is limited, it's important to recover | |
2906 | * used MR as soon as I/O is finished. Hold MR longer in the later | |
2907 | * I/O process can possibly result in I/O deadlock due to lack of MR | |
2908 | * to send request on I/O retry | |
2909 | */ | |
2910 | if (wdata->mr) { | |
2911 | smbd_deregister_mr(wdata->mr); | |
2912 | wdata->mr = NULL; | |
2913 | } | |
2914 | #endif | |
33319141 PS |
2915 | if (wdata->result) |
2916 | cifs_stats_fail_inc(tcon, SMB2_WRITE_HE); | |
2917 | ||
2918 | queue_work(cifsiod_wq, &wdata->work); | |
2919 | DeleteMidQEntry(mid); | |
2920 | add_credits(tcon->ses->server, credits_received, 0); | |
2921 | } | |
2922 | ||
2923 | /* smb2_async_writev - send an async write, and set up mid to handle result */ | |
2924 | int | |
4a5c80d7 SF |
2925 | smb2_async_writev(struct cifs_writedata *wdata, |
2926 | void (*release)(struct kref *kref)) | |
33319141 | 2927 | { |
cb7e9eab | 2928 | int rc = -EACCES, flags = 0; |
33319141 | 2929 | struct smb2_write_req *req = NULL; |
31473fc4 | 2930 | struct smb2_sync_hdr *shdr; |
33319141 | 2931 | struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink); |
cb7e9eab | 2932 | struct TCP_Server_Info *server = tcon->ses->server; |
738f9de5 PS |
2933 | struct kvec iov[2]; |
2934 | struct smb_rqst rqst = { }; | |
f5688a6d RS |
2935 | unsigned int total_len; |
2936 | __be32 rfc1002_marker; | |
33319141 | 2937 | |
f5688a6d | 2938 | rc = smb2_plain_req_init(SMB2_WRITE, tcon, (void **) &req, &total_len); |
cb7e9eab PS |
2939 | if (rc) { |
2940 | if (rc == -EAGAIN && wdata->credits) { | |
2941 | /* credits was reset by reconnect */ | |
2942 | wdata->credits = 0; | |
2943 | /* reduce in_flight value since we won't send the req */ | |
2944 | spin_lock(&server->req_lock); | |
2945 | server->in_flight--; | |
2946 | spin_unlock(&server->req_lock); | |
2947 | } | |
33319141 | 2948 | goto async_writev_out; |
cb7e9eab | 2949 | } |
33319141 | 2950 | |
7fb8986e PS |
2951 | if (encryption_required(tcon)) |
2952 | flags |= CIFS_TRANSFORM_REQ; | |
2953 | ||
f5688a6d | 2954 | shdr = (struct smb2_sync_hdr *)req; |
31473fc4 | 2955 | shdr->ProcessId = cpu_to_le32(wdata->cfile->pid); |
33319141 PS |
2956 | |
2957 | req->PersistentFileId = wdata->cfile->fid.persistent_fid; | |
2958 | req->VolatileFileId = wdata->cfile->fid.volatile_fid; | |
2959 | req->WriteChannelInfoOffset = 0; | |
2960 | req->WriteChannelInfoLength = 0; | |
2961 | req->Channel = 0; | |
2962 | req->Offset = cpu_to_le64(wdata->offset); | |
33319141 | 2963 | req->DataOffset = cpu_to_le16( |
f5688a6d | 2964 | offsetof(struct smb2_write_req, Buffer)); |
33319141 | 2965 | req->RemainingBytes = 0; |
db223a59 LL |
2966 | #ifdef CONFIG_CIFS_SMB_DIRECT |
2967 | /* | |
2968 | * If we want to do a server RDMA read, fill in and append | |
2969 | * smbd_buffer_descriptor_v1 to the end of write request | |
2970 | */ | |
2971 | if (server->rdma && wdata->bytes >= | |
2972 | server->smbd_conn->rdma_readwrite_threshold) { | |
2973 | ||
2974 | struct smbd_buffer_descriptor_v1 *v1; | |
2975 | bool need_invalidate = server->dialect == SMB30_PROT_ID; | |
2976 | ||
2977 | wdata->mr = smbd_register_mr( | |
2978 | server->smbd_conn, wdata->pages, | |
2979 | wdata->nr_pages, wdata->tailsz, | |
2980 | false, need_invalidate); | |
2981 | if (!wdata->mr) { | |
2982 | rc = -ENOBUFS; | |
2983 | goto async_writev_out; | |
2984 | } | |
2985 | req->Length = 0; | |
2986 | req->DataOffset = 0; | |
2987 | req->RemainingBytes = | |
2026b06e | 2988 | cpu_to_le32((wdata->nr_pages-1)*PAGE_SIZE + wdata->tailsz); |
db223a59 LL |
2989 | req->Channel = SMB2_CHANNEL_RDMA_V1_INVALIDATE; |
2990 | if (need_invalidate) | |
2991 | req->Channel = SMB2_CHANNEL_RDMA_V1; | |
2992 | req->WriteChannelInfoOffset = | |
2026b06e | 2993 | cpu_to_le16(offsetof(struct smb2_write_req, Buffer)); |
db223a59 | 2994 | req->WriteChannelInfoLength = |
2026b06e | 2995 | cpu_to_le16(sizeof(struct smbd_buffer_descriptor_v1)); |
db223a59 | 2996 | v1 = (struct smbd_buffer_descriptor_v1 *) &req->Buffer[0]; |
2026b06e SF |
2997 | v1->offset = cpu_to_le64(wdata->mr->mr->iova); |
2998 | v1->token = cpu_to_le32(wdata->mr->mr->rkey); | |
2999 | v1->length = cpu_to_le32(wdata->mr->mr->length); | |
db223a59 LL |
3000 | } |
3001 | #endif | |
33319141 | 3002 | /* 4 for rfc1002 length field and 1 for Buffer */ |
738f9de5 | 3003 | iov[0].iov_len = 4; |
f5688a6d RS |
3004 | rfc1002_marker = cpu_to_be32(total_len - 1 + wdata->bytes); |
3005 | iov[0].iov_base = &rfc1002_marker; | |
3006 | iov[1].iov_len = total_len - 1; | |
3007 | iov[1].iov_base = (char *)req; | |
33319141 | 3008 | |
738f9de5 PS |
3009 | rqst.rq_iov = iov; |
3010 | rqst.rq_nvec = 2; | |
eddb079d JL |
3011 | rqst.rq_pages = wdata->pages; |
3012 | rqst.rq_npages = wdata->nr_pages; | |
3013 | rqst.rq_pagesz = wdata->pagesz; | |
3014 | rqst.rq_tailsz = wdata->tailsz; | |
db223a59 LL |
3015 | #ifdef CONFIG_CIFS_SMB_DIRECT |
3016 | if (wdata->mr) { | |
3017 | iov[1].iov_len += sizeof(struct smbd_buffer_descriptor_v1); | |
3018 | rqst.rq_npages = 0; | |
3019 | } | |
3020 | #endif | |
f96637be JP |
3021 | cifs_dbg(FYI, "async write at %llu %u bytes\n", |
3022 | wdata->offset, wdata->bytes); | |
33319141 | 3023 | |
db223a59 LL |
3024 | #ifdef CONFIG_CIFS_SMB_DIRECT |
3025 | /* For RDMA read, I/O size is in RemainingBytes not in Length */ | |
3026 | if (!wdata->mr) | |
3027 | req->Length = cpu_to_le32(wdata->bytes); | |
3028 | #else | |
33319141 | 3029 | req->Length = cpu_to_le32(wdata->bytes); |
db223a59 | 3030 | #endif |
33319141 | 3031 | |
cb7e9eab | 3032 | if (wdata->credits) { |
31473fc4 | 3033 | shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(wdata->bytes, |
cb7e9eab | 3034 | SMB2_MAX_BUFFER_SIZE)); |
31473fc4 | 3035 | shdr->CreditRequest = shdr->CreditCharge; |
cb7e9eab PS |
3036 | spin_lock(&server->req_lock); |
3037 | server->credits += wdata->credits - | |
31473fc4 | 3038 | le16_to_cpu(shdr->CreditCharge); |
cb7e9eab PS |
3039 | spin_unlock(&server->req_lock); |
3040 | wake_up(&server->request_q); | |
7fb8986e | 3041 | flags |= CIFS_HAS_CREDITS; |
cb7e9eab PS |
3042 | } |
3043 | ||
33319141 | 3044 | kref_get(&wdata->refcount); |
9b7c18a2 PS |
3045 | rc = cifs_call_async(server, &rqst, NULL, smb2_writev_callback, NULL, |
3046 | wdata, flags); | |
33319141 | 3047 | |
e5d04887 | 3048 | if (rc) { |
4a5c80d7 | 3049 | kref_put(&wdata->refcount, release); |
e5d04887 PS |
3050 | cifs_stats_fail_inc(tcon, SMB2_WRITE_HE); |
3051 | } | |
33319141 | 3052 | |
33319141 PS |
3053 | async_writev_out: |
3054 | cifs_small_buf_release(req); | |
33319141 PS |
3055 | return rc; |
3056 | } | |
009d3443 PS |
3057 | |
3058 | /* | |
3059 | * SMB2_write function gets iov pointer to kvec array with n_vec as a length. | |
3060 | * The length field from io_parms must be at least 1 and indicates a number of | |
3061 | * elements with data to write that begins with position 1 in iov array. All | |
3062 | * data length is specified by count. | |
3063 | */ | |
3064 | int | |
3065 | SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms, | |
3066 | unsigned int *nbytes, struct kvec *iov, int n_vec) | |
3067 | { | |
3068 | int rc = 0; | |
3069 | struct smb2_write_req *req = NULL; | |
3070 | struct smb2_write_rsp *rsp = NULL; | |
3071 | int resp_buftype; | |
da502f7d | 3072 | struct kvec rsp_iov; |
7fb8986e | 3073 | int flags = 0; |
f5688a6d | 3074 | unsigned int total_len; |
da502f7d | 3075 | |
009d3443 PS |
3076 | *nbytes = 0; |
3077 | ||
3078 | if (n_vec < 1) | |
3079 | return rc; | |
3080 | ||
f5688a6d RS |
3081 | rc = smb2_plain_req_init(SMB2_WRITE, io_parms->tcon, (void **) &req, |
3082 | &total_len); | |
009d3443 PS |
3083 | if (rc) |
3084 | return rc; | |
3085 | ||
3086 | if (io_parms->tcon->ses->server == NULL) | |
3087 | return -ECONNABORTED; | |
3088 | ||
7fb8986e PS |
3089 | if (encryption_required(io_parms->tcon)) |
3090 | flags |= CIFS_TRANSFORM_REQ; | |
3091 | ||
f5688a6d | 3092 | req->sync_hdr.ProcessId = cpu_to_le32(io_parms->pid); |
009d3443 PS |
3093 | |
3094 | req->PersistentFileId = io_parms->persistent_fid; | |
3095 | req->VolatileFileId = io_parms->volatile_fid; | |
3096 | req->WriteChannelInfoOffset = 0; | |
3097 | req->WriteChannelInfoLength = 0; | |
3098 | req->Channel = 0; | |
3099 | req->Length = cpu_to_le32(io_parms->length); | |
3100 | req->Offset = cpu_to_le64(io_parms->offset); | |
009d3443 | 3101 | req->DataOffset = cpu_to_le16( |
f5688a6d | 3102 | offsetof(struct smb2_write_req, Buffer)); |
009d3443 PS |
3103 | req->RemainingBytes = 0; |
3104 | ||
3105 | iov[0].iov_base = (char *)req; | |
f5688a6d RS |
3106 | /* 1 for Buffer */ |
3107 | iov[0].iov_len = total_len - 1; | |
009d3443 | 3108 | |
f5688a6d RS |
3109 | rc = smb2_send_recv(xid, io_parms->tcon->ses, iov, n_vec + 1, |
3110 | &resp_buftype, flags, &rsp_iov); | |
da502f7d PS |
3111 | cifs_small_buf_release(req); |
3112 | rsp = (struct smb2_write_rsp *)rsp_iov.iov_base; | |
009d3443 PS |
3113 | |
3114 | if (rc) { | |
3115 | cifs_stats_fail_inc(io_parms->tcon, SMB2_WRITE_HE); | |
f96637be | 3116 | cifs_dbg(VFS, "Send error in write = %d\n", rc); |
e5d04887 | 3117 | } else |
009d3443 | 3118 | *nbytes = le32_to_cpu(rsp->DataLength); |
e5d04887 PS |
3119 | |
3120 | free_rsp_buf(resp_buftype, rsp); | |
009d3443 PS |
3121 | return rc; |
3122 | } | |
35143eb5 | 3123 | |
d324f08d PS |
3124 | static unsigned int |
3125 | num_entries(char *bufstart, char *end_of_buf, char **lastentry, size_t size) | |
3126 | { | |
3127 | int len; | |
3128 | unsigned int entrycount = 0; | |
3129 | unsigned int next_offset = 0; | |
3130 | FILE_DIRECTORY_INFO *entryptr; | |
3131 | ||
3132 | if (bufstart == NULL) | |
3133 | return 0; | |
3134 | ||
3135 | entryptr = (FILE_DIRECTORY_INFO *)bufstart; | |
3136 | ||
3137 | while (1) { | |
3138 | entryptr = (FILE_DIRECTORY_INFO *) | |
3139 | ((char *)entryptr + next_offset); | |
3140 | ||
3141 | if ((char *)entryptr + size > end_of_buf) { | |
f96637be | 3142 | cifs_dbg(VFS, "malformed search entry would overflow\n"); |
d324f08d PS |
3143 | break; |
3144 | } | |
3145 | ||
3146 | len = le32_to_cpu(entryptr->FileNameLength); | |
3147 | if ((char *)entryptr + len + size > end_of_buf) { | |
f96637be JP |
3148 | cifs_dbg(VFS, "directory entry name would overflow frame end of buf %p\n", |
3149 | end_of_buf); | |
d324f08d PS |
3150 | break; |
3151 | } | |
3152 | ||
3153 | *lastentry = (char *)entryptr; | |
3154 | entrycount++; | |
3155 | ||
3156 | next_offset = le32_to_cpu(entryptr->NextEntryOffset); | |
3157 | if (!next_offset) | |
3158 | break; | |
3159 | } | |
3160 | ||
3161 | return entrycount; | |
3162 | } | |
3163 | ||
3164 | /* | |
3165 | * Readdir/FindFirst | |
3166 | */ | |
3167 | int | |
3168 | SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon, | |
3169 | u64 persistent_fid, u64 volatile_fid, int index, | |
3170 | struct cifs_search_info *srch_inf) | |
3171 | { | |
3172 | struct smb2_query_directory_req *req; | |
3173 | struct smb2_query_directory_rsp *rsp = NULL; | |
3174 | struct kvec iov[2]; | |
da502f7d | 3175 | struct kvec rsp_iov; |
d324f08d PS |
3176 | int rc = 0; |
3177 | int len; | |
75fdfc84 | 3178 | int resp_buftype = CIFS_NO_BUFFER; |
d324f08d PS |
3179 | unsigned char *bufptr; |
3180 | struct TCP_Server_Info *server; | |
3181 | struct cifs_ses *ses = tcon->ses; | |
3182 | __le16 asteriks = cpu_to_le16('*'); | |
3183 | char *end_of_smb; | |
3184 | unsigned int output_size = CIFSMaxBufSize; | |
3185 | size_t info_buf_size; | |
7fb8986e | 3186 | int flags = 0; |
7c00c3a6 | 3187 | unsigned int total_len; |
d324f08d PS |
3188 | |
3189 | if (ses && (ses->server)) | |
3190 | server = ses->server; | |
3191 | else | |
3192 | return -EIO; | |
3193 | ||
7c00c3a6 RS |
3194 | rc = smb2_plain_req_init(SMB2_QUERY_DIRECTORY, tcon, (void **) &req, |
3195 | &total_len); | |
d324f08d PS |
3196 | if (rc) |
3197 | return rc; | |
3198 | ||
7fb8986e PS |
3199 | if (encryption_required(tcon)) |
3200 | flags |= CIFS_TRANSFORM_REQ; | |
3201 | ||
d324f08d PS |
3202 | switch (srch_inf->info_level) { |
3203 | case SMB_FIND_FILE_DIRECTORY_INFO: | |
3204 | req->FileInformationClass = FILE_DIRECTORY_INFORMATION; | |
3205 | info_buf_size = sizeof(FILE_DIRECTORY_INFO) - 1; | |
3206 | break; | |
3207 | case SMB_FIND_FILE_ID_FULL_DIR_INFO: | |
3208 | req->FileInformationClass = FILEID_FULL_DIRECTORY_INFORMATION; | |
3209 | info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO) - 1; | |
3210 | break; | |
3211 | default: | |
f96637be JP |
3212 | cifs_dbg(VFS, "info level %u isn't supported\n", |
3213 | srch_inf->info_level); | |
d324f08d PS |
3214 | rc = -EINVAL; |
3215 | goto qdir_exit; | |
3216 | } | |
3217 | ||
3218 | req->FileIndex = cpu_to_le32(index); | |
3219 | req->PersistentFileId = persistent_fid; | |
3220 | req->VolatileFileId = volatile_fid; | |
3221 | ||
3222 | len = 0x2; | |
3223 | bufptr = req->Buffer; | |
3224 | memcpy(bufptr, &asteriks, len); | |
3225 | ||
3226 | req->FileNameOffset = | |
7c00c3a6 | 3227 | cpu_to_le16(sizeof(struct smb2_query_directory_req) - 1); |
d324f08d PS |
3228 | req->FileNameLength = cpu_to_le16(len); |
3229 | /* | |
3230 | * BB could be 30 bytes or so longer if we used SMB2 specific | |
3231 | * buffer lengths, but this is safe and close enough. | |
3232 | */ | |
3233 | output_size = min_t(unsigned int, output_size, server->maxBuf); | |
3234 | output_size = min_t(unsigned int, output_size, 2 << 15); | |
3235 | req->OutputBufferLength = cpu_to_le32(output_size); | |
3236 | ||
3237 | iov[0].iov_base = (char *)req; | |
7c00c3a6 RS |
3238 | /* 1 for Buffer */ |
3239 | iov[0].iov_len = total_len - 1; | |
d324f08d PS |
3240 | |
3241 | iov[1].iov_base = (char *)(req->Buffer); | |
3242 | iov[1].iov_len = len; | |
3243 | ||
7c00c3a6 | 3244 | rc = smb2_send_recv(xid, ses, iov, 2, &resp_buftype, flags, &rsp_iov); |
da502f7d PS |
3245 | cifs_small_buf_release(req); |
3246 | rsp = (struct smb2_query_directory_rsp *)rsp_iov.iov_base; | |
e5d04887 | 3247 | |
d324f08d | 3248 | if (rc) { |
31473fc4 PS |
3249 | if (rc == -ENODATA && |
3250 | rsp->hdr.sync_hdr.Status == STATUS_NO_MORE_FILES) { | |
52755808 PS |
3251 | srch_inf->endOfSearch = true; |
3252 | rc = 0; | |
3253 | } | |
d324f08d PS |
3254 | cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE); |
3255 | goto qdir_exit; | |
3256 | } | |
d324f08d | 3257 | |
c1596ff5 RS |
3258 | rc = validate_iov(server, |
3259 | le16_to_cpu(rsp->OutputBufferOffset), | |
3260 | le32_to_cpu(rsp->OutputBufferLength), &rsp_iov, | |
d324f08d PS |
3261 | info_buf_size); |
3262 | if (rc) | |
3263 | goto qdir_exit; | |
3264 | ||
3265 | srch_inf->unicode = true; | |
3266 | ||
3267 | if (srch_inf->ntwrk_buf_start) { | |
3268 | if (srch_inf->smallBuf) | |
3269 | cifs_small_buf_release(srch_inf->ntwrk_buf_start); | |
3270 | else | |
3271 | cifs_buf_release(srch_inf->ntwrk_buf_start); | |
3272 | } | |
3273 | srch_inf->ntwrk_buf_start = (char *)rsp; | |
3274 | srch_inf->srch_entries_start = srch_inf->last_entry = 4 /* rfclen */ + | |
3275 | (char *)&rsp->hdr + le16_to_cpu(rsp->OutputBufferOffset); | |
3276 | /* 4 for rfc1002 length field */ | |
3277 | end_of_smb = get_rfc1002_length(rsp) + 4 + (char *)&rsp->hdr; | |
3278 | srch_inf->entries_in_buffer = | |
3279 | num_entries(srch_inf->srch_entries_start, end_of_smb, | |
3280 | &srch_inf->last_entry, info_buf_size); | |
3281 | srch_inf->index_of_last_entry += srch_inf->entries_in_buffer; | |
f96637be JP |
3282 | cifs_dbg(FYI, "num entries %d last_index %lld srch start %p srch end %p\n", |
3283 | srch_inf->entries_in_buffer, srch_inf->index_of_last_entry, | |
3284 | srch_inf->srch_entries_start, srch_inf->last_entry); | |
d324f08d PS |
3285 | if (resp_buftype == CIFS_LARGE_BUFFER) |
3286 | srch_inf->smallBuf = false; | |
3287 | else if (resp_buftype == CIFS_SMALL_BUFFER) | |
3288 | srch_inf->smallBuf = true; | |
3289 | else | |
f96637be | 3290 | cifs_dbg(VFS, "illegal search buffer type\n"); |
d324f08d | 3291 | |
d324f08d PS |
3292 | return rc; |
3293 | ||
3294 | qdir_exit: | |
3295 | free_rsp_buf(resp_buftype, rsp); | |
3296 | return rc; | |
3297 | } | |
3298 | ||
35143eb5 PS |
3299 | static int |
3300 | send_set_info(const unsigned int xid, struct cifs_tcon *tcon, | |
dac95340 SP |
3301 | u64 persistent_fid, u64 volatile_fid, u32 pid, u8 info_class, |
3302 | u8 info_type, u32 additional_info, unsigned int num, | |
3303 | void **data, unsigned int *size) | |
35143eb5 PS |
3304 | { |
3305 | struct smb2_set_info_req *req; | |
3306 | struct smb2_set_info_rsp *rsp = NULL; | |
3307 | struct kvec *iov; | |
da502f7d | 3308 | struct kvec rsp_iov; |
35143eb5 PS |
3309 | int rc = 0; |
3310 | int resp_buftype; | |
3311 | unsigned int i; | |
35143eb5 | 3312 | struct cifs_ses *ses = tcon->ses; |
7fb8986e | 3313 | int flags = 0; |
2fc803ef | 3314 | unsigned int total_len; |
35143eb5 | 3315 | |
68a6afa7 | 3316 | if (!ses || !(ses->server)) |
35143eb5 PS |
3317 | return -EIO; |
3318 | ||
3319 | if (!num) | |
3320 | return -EINVAL; | |
3321 | ||
3322 | iov = kmalloc(sizeof(struct kvec) * num, GFP_KERNEL); | |
3323 | if (!iov) | |
3324 | return -ENOMEM; | |
3325 | ||
2fc803ef | 3326 | rc = smb2_plain_req_init(SMB2_SET_INFO, tcon, (void **) &req, &total_len); |
35143eb5 PS |
3327 | if (rc) { |
3328 | kfree(iov); | |
3329 | return rc; | |
3330 | } | |
3331 | ||
7fb8986e PS |
3332 | if (encryption_required(tcon)) |
3333 | flags |= CIFS_TRANSFORM_REQ; | |
3334 | ||
2fc803ef | 3335 | req->sync_hdr.ProcessId = cpu_to_le32(pid); |
c839ff24 | 3336 | |
dac95340 | 3337 | req->InfoType = info_type; |
35143eb5 PS |
3338 | req->FileInfoClass = info_class; |
3339 | req->PersistentFileId = persistent_fid; | |
3340 | req->VolatileFileId = volatile_fid; | |
dac95340 | 3341 | req->AdditionalInformation = cpu_to_le32(additional_info); |
35143eb5 | 3342 | |
35143eb5 | 3343 | req->BufferOffset = |
2fc803ef | 3344 | cpu_to_le16(sizeof(struct smb2_set_info_req) - 1); |
35143eb5 PS |
3345 | req->BufferLength = cpu_to_le32(*size); |
3346 | ||
35143eb5 | 3347 | memcpy(req->Buffer, *data, *size); |
2fc803ef | 3348 | total_len += *size; |
35143eb5 PS |
3349 | |
3350 | iov[0].iov_base = (char *)req; | |
2fc803ef RS |
3351 | /* 1 for Buffer */ |
3352 | iov[0].iov_len = total_len - 1; | |
35143eb5 PS |
3353 | |
3354 | for (i = 1; i < num; i++) { | |
35143eb5 PS |
3355 | le32_add_cpu(&req->BufferLength, size[i]); |
3356 | iov[i].iov_base = (char *)data[i]; | |
3357 | iov[i].iov_len = size[i]; | |
3358 | } | |
3359 | ||
2fc803ef RS |
3360 | rc = smb2_send_recv(xid, ses, iov, num, &resp_buftype, flags, |
3361 | &rsp_iov); | |
da502f7d PS |
3362 | cifs_small_buf_release(req); |
3363 | rsp = (struct smb2_set_info_rsp *)rsp_iov.iov_base; | |
35143eb5 | 3364 | |
7d3fb24b | 3365 | if (rc != 0) |
35143eb5 | 3366 | cifs_stats_fail_inc(tcon, SMB2_SET_INFO_HE); |
7d3fb24b | 3367 | |
35143eb5 PS |
3368 | free_rsp_buf(resp_buftype, rsp); |
3369 | kfree(iov); | |
3370 | return rc; | |
3371 | } | |
3372 | ||
3373 | int | |
3374 | SMB2_rename(const unsigned int xid, struct cifs_tcon *tcon, | |
3375 | u64 persistent_fid, u64 volatile_fid, __le16 *target_file) | |
3376 | { | |
3377 | struct smb2_file_rename_info info; | |
3378 | void **data; | |
3379 | unsigned int size[2]; | |
3380 | int rc; | |
3381 | int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX)); | |
3382 | ||
3383 | data = kmalloc(sizeof(void *) * 2, GFP_KERNEL); | |
3384 | if (!data) | |
3385 | return -ENOMEM; | |
3386 | ||
3387 | info.ReplaceIfExists = 1; /* 1 = replace existing target with new */ | |
3388 | /* 0 = fail if target already exists */ | |
3389 | info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */ | |
3390 | info.FileNameLength = cpu_to_le32(len); | |
3391 | ||
3392 | data[0] = &info; | |
3393 | size[0] = sizeof(struct smb2_file_rename_info); | |
3394 | ||
3395 | data[1] = target_file; | |
3396 | size[1] = len + 2 /* null */; | |
3397 | ||
3398 | rc = send_set_info(xid, tcon, persistent_fid, volatile_fid, | |
dac95340 SP |
3399 | current->tgid, FILE_RENAME_INFORMATION, SMB2_O_INFO_FILE, |
3400 | 0, 2, data, size); | |
35143eb5 PS |
3401 | kfree(data); |
3402 | return rc; | |
3403 | } | |
568798cc | 3404 | |
897fba11 SF |
3405 | int |
3406 | SMB2_rmdir(const unsigned int xid, struct cifs_tcon *tcon, | |
3407 | u64 persistent_fid, u64 volatile_fid) | |
3408 | { | |
3409 | __u8 delete_pending = 1; | |
3410 | void *data; | |
3411 | unsigned int size; | |
3412 | ||
3413 | data = &delete_pending; | |
3414 | size = 1; /* sizeof __u8 */ | |
3415 | ||
3416 | return send_set_info(xid, tcon, persistent_fid, volatile_fid, | |
dac95340 SP |
3417 | current->tgid, FILE_DISPOSITION_INFORMATION, SMB2_O_INFO_FILE, |
3418 | 0, 1, &data, &size); | |
897fba11 SF |
3419 | } |
3420 | ||
568798cc PS |
3421 | int |
3422 | SMB2_set_hardlink(const unsigned int xid, struct cifs_tcon *tcon, | |
3423 | u64 persistent_fid, u64 volatile_fid, __le16 *target_file) | |
3424 | { | |
3425 | struct smb2_file_link_info info; | |
3426 | void **data; | |
3427 | unsigned int size[2]; | |
3428 | int rc; | |
3429 | int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX)); | |
3430 | ||
3431 | data = kmalloc(sizeof(void *) * 2, GFP_KERNEL); | |
3432 | if (!data) | |
3433 | return -ENOMEM; | |
3434 | ||
3435 | info.ReplaceIfExists = 0; /* 1 = replace existing link with new */ | |
3436 | /* 0 = fail if link already exists */ | |
3437 | info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */ | |
3438 | info.FileNameLength = cpu_to_le32(len); | |
3439 | ||
3440 | data[0] = &info; | |
3441 | size[0] = sizeof(struct smb2_file_link_info); | |
3442 | ||
3443 | data[1] = target_file; | |
3444 | size[1] = len + 2 /* null */; | |
3445 | ||
3446 | rc = send_set_info(xid, tcon, persistent_fid, volatile_fid, | |
dac95340 SP |
3447 | current->tgid, FILE_LINK_INFORMATION, SMB2_O_INFO_FILE, |
3448 | 0, 2, data, size); | |
568798cc PS |
3449 | kfree(data); |
3450 | return rc; | |
3451 | } | |
c839ff24 PS |
3452 | |
3453 | int | |
3454 | SMB2_set_eof(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, | |
f29ebb47 | 3455 | u64 volatile_fid, u32 pid, __le64 *eof, bool is_falloc) |
c839ff24 PS |
3456 | { |
3457 | struct smb2_file_eof_info info; | |
3458 | void *data; | |
3459 | unsigned int size; | |
3460 | ||
3461 | info.EndOfFile = *eof; | |
3462 | ||
3463 | data = &info; | |
3464 | size = sizeof(struct smb2_file_eof_info); | |
3465 | ||
f29ebb47 SF |
3466 | if (is_falloc) |
3467 | return send_set_info(xid, tcon, persistent_fid, volatile_fid, | |
dac95340 SP |
3468 | pid, FILE_ALLOCATION_INFORMATION, SMB2_O_INFO_FILE, |
3469 | 0, 1, &data, &size); | |
f29ebb47 SF |
3470 | else |
3471 | return send_set_info(xid, tcon, persistent_fid, volatile_fid, | |
dac95340 SP |
3472 | pid, FILE_END_OF_FILE_INFORMATION, SMB2_O_INFO_FILE, |
3473 | 0, 1, &data, &size); | |
c839ff24 | 3474 | } |
1feeaac7 PS |
3475 | |
3476 | int | |
3477 | SMB2_set_info(const unsigned int xid, struct cifs_tcon *tcon, | |
3478 | u64 persistent_fid, u64 volatile_fid, FILE_BASIC_INFO *buf) | |
3479 | { | |
3480 | unsigned int size; | |
3481 | size = sizeof(FILE_BASIC_INFO); | |
3482 | return send_set_info(xid, tcon, persistent_fid, volatile_fid, | |
dac95340 SP |
3483 | current->tgid, FILE_BASIC_INFORMATION, SMB2_O_INFO_FILE, |
3484 | 0, 1, (void **)&buf, &size); | |
3485 | } | |
3486 | ||
3487 | int | |
3488 | SMB2_set_acl(const unsigned int xid, struct cifs_tcon *tcon, | |
3489 | u64 persistent_fid, u64 volatile_fid, | |
3490 | struct cifs_ntsd *pnntsd, int pacllen, int aclflag) | |
3491 | { | |
3492 | return send_set_info(xid, tcon, persistent_fid, volatile_fid, | |
3493 | current->tgid, 0, SMB2_O_INFO_SECURITY, aclflag, | |
3494 | 1, (void **)&pnntsd, &pacllen); | |
1feeaac7 | 3495 | } |
983c88a4 | 3496 | |
5517554e RS |
3497 | int |
3498 | SMB2_set_ea(const unsigned int xid, struct cifs_tcon *tcon, | |
3499 | u64 persistent_fid, u64 volatile_fid, | |
3500 | struct smb2_file_full_ea_info *buf, int len) | |
3501 | { | |
3502 | return send_set_info(xid, tcon, persistent_fid, volatile_fid, | |
3503 | current->tgid, FILE_FULL_EA_INFORMATION, SMB2_O_INFO_FILE, | |
3504 | 0, 1, (void **)&buf, &len); | |
3505 | } | |
3506 | ||
983c88a4 PS |
3507 | int |
3508 | SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon, | |
3509 | const u64 persistent_fid, const u64 volatile_fid, | |
3510 | __u8 oplock_level) | |
3511 | { | |
3512 | int rc; | |
21ad9487 RS |
3513 | struct smb2_oplock_break_req *req = NULL; |
3514 | struct cifs_ses *ses = tcon->ses; | |
7fb8986e | 3515 | int flags = CIFS_OBREAK_OP; |
21ad9487 RS |
3516 | unsigned int total_len; |
3517 | struct kvec iov[1]; | |
3518 | struct kvec rsp_iov; | |
3519 | int resp_buf_type; | |
983c88a4 | 3520 | |
f96637be | 3521 | cifs_dbg(FYI, "SMB2_oplock_break\n"); |
21ad9487 RS |
3522 | rc = smb2_plain_req_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req, |
3523 | &total_len); | |
983c88a4 PS |
3524 | if (rc) |
3525 | return rc; | |
3526 | ||
7fb8986e PS |
3527 | if (encryption_required(tcon)) |
3528 | flags |= CIFS_TRANSFORM_REQ; | |
3529 | ||
983c88a4 PS |
3530 | req->VolatileFid = volatile_fid; |
3531 | req->PersistentFid = persistent_fid; | |
3532 | req->OplockLevel = oplock_level; | |
21ad9487 | 3533 | req->sync_hdr.CreditRequest = cpu_to_le16(1); |
983c88a4 | 3534 | |
21ad9487 RS |
3535 | flags |= CIFS_NO_RESP; |
3536 | ||
3537 | iov[0].iov_base = (char *)req; | |
3538 | iov[0].iov_len = total_len; | |
3539 | ||
3540 | rc = smb2_send_recv(xid, ses, iov, 1, &resp_buf_type, flags, &rsp_iov); | |
da502f7d | 3541 | cifs_small_buf_release(req); |
983c88a4 PS |
3542 | |
3543 | if (rc) { | |
3544 | cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE); | |
f96637be | 3545 | cifs_dbg(FYI, "Send error in Oplock Break = %d\n", rc); |
983c88a4 PS |
3546 | } |
3547 | ||
3548 | return rc; | |
3549 | } | |
6fc05c25 PS |
3550 | |
3551 | static void | |
3552 | copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info *pfs_inf, | |
3553 | struct kstatfs *kst) | |
3554 | { | |
3555 | kst->f_bsize = le32_to_cpu(pfs_inf->BytesPerSector) * | |
3556 | le32_to_cpu(pfs_inf->SectorsPerAllocationUnit); | |
3557 | kst->f_blocks = le64_to_cpu(pfs_inf->TotalAllocationUnits); | |
42bec214 SP |
3558 | kst->f_bfree = kst->f_bavail = |
3559 | le64_to_cpu(pfs_inf->CallerAvailableAllocationUnits); | |
6fc05c25 PS |
3560 | return; |
3561 | } | |
3562 | ||
3563 | static int | |
3564 | build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon, int level, | |
3565 | int outbuf_len, u64 persistent_fid, u64 volatile_fid) | |
3566 | { | |
c0953f2e | 3567 | struct TCP_Server_Info *server; |
6fc05c25 PS |
3568 | int rc; |
3569 | struct smb2_query_info_req *req; | |
b2fb7fec | 3570 | unsigned int total_len; |
6fc05c25 | 3571 | |
f96637be | 3572 | cifs_dbg(FYI, "Query FSInfo level %d\n", level); |
6fc05c25 PS |
3573 | |
3574 | if ((tcon->ses == NULL) || (tcon->ses->server == NULL)) | |
3575 | return -EIO; | |
3576 | ||
c0953f2e GS |
3577 | server = tcon->ses->server; |
3578 | ||
b2fb7fec RS |
3579 | rc = smb2_plain_req_init(SMB2_QUERY_INFO, tcon, (void **) &req, |
3580 | &total_len); | |
6fc05c25 PS |
3581 | if (rc) |
3582 | return rc; | |
3583 | ||
3584 | req->InfoType = SMB2_O_INFO_FILESYSTEM; | |
3585 | req->FileInfoClass = level; | |
3586 | req->PersistentFileId = persistent_fid; | |
3587 | req->VolatileFileId = volatile_fid; | |
b2fb7fec | 3588 | /* 1 for pad */ |
6fc05c25 | 3589 | req->InputBufferOffset = |
b2fb7fec | 3590 | cpu_to_le16(sizeof(struct smb2_query_info_req) - 1); |
6fc05c25 | 3591 | req->OutputBufferLength = cpu_to_le32( |
93012bf9 | 3592 | outbuf_len + sizeof(struct smb2_query_info_rsp) - 1 - server->vals->header_preamble_size); |
6fc05c25 PS |
3593 | |
3594 | iov->iov_base = (char *)req; | |
b2fb7fec | 3595 | iov->iov_len = total_len; |
6fc05c25 PS |
3596 | return 0; |
3597 | } | |
3598 | ||
3599 | int | |
3600 | SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon, | |
3601 | u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata) | |
3602 | { | |
3603 | struct smb2_query_info_rsp *rsp = NULL; | |
3604 | struct kvec iov; | |
da502f7d | 3605 | struct kvec rsp_iov; |
6fc05c25 PS |
3606 | int rc = 0; |
3607 | int resp_buftype; | |
3608 | struct cifs_ses *ses = tcon->ses; | |
93012bf9 | 3609 | struct TCP_Server_Info *server = ses->server; |
6fc05c25 | 3610 | struct smb2_fs_full_size_info *info = NULL; |
7fb8986e | 3611 | int flags = 0; |
6fc05c25 PS |
3612 | |
3613 | rc = build_qfs_info_req(&iov, tcon, FS_FULL_SIZE_INFORMATION, | |
3614 | sizeof(struct smb2_fs_full_size_info), | |
3615 | persistent_fid, volatile_fid); | |
3616 | if (rc) | |
3617 | return rc; | |
3618 | ||
7fb8986e PS |
3619 | if (encryption_required(tcon)) |
3620 | flags |= CIFS_TRANSFORM_REQ; | |
3621 | ||
b2fb7fec | 3622 | rc = smb2_send_recv(xid, ses, &iov, 1, &resp_buftype, flags, &rsp_iov); |
da502f7d | 3623 | cifs_small_buf_release(iov.iov_base); |
6fc05c25 PS |
3624 | if (rc) { |
3625 | cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE); | |
34f62640 | 3626 | goto qfsinf_exit; |
6fc05c25 | 3627 | } |
da502f7d | 3628 | rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; |
6fc05c25 | 3629 | |
93012bf9 | 3630 | info = (struct smb2_fs_full_size_info *)(server->vals->header_preamble_size + |
6fc05c25 | 3631 | le16_to_cpu(rsp->OutputBufferOffset) + (char *)&rsp->hdr); |
c1596ff5 RS |
3632 | rc = validate_iov(server, |
3633 | le16_to_cpu(rsp->OutputBufferOffset), | |
3634 | le32_to_cpu(rsp->OutputBufferLength), &rsp_iov, | |
6fc05c25 PS |
3635 | sizeof(struct smb2_fs_full_size_info)); |
3636 | if (!rc) | |
3637 | copy_fs_info_to_kstatfs(info, fsdata); | |
3638 | ||
34f62640 | 3639 | qfsinf_exit: |
da502f7d | 3640 | free_rsp_buf(resp_buftype, rsp_iov.iov_base); |
34f62640 SF |
3641 | return rc; |
3642 | } | |
3643 | ||
3644 | int | |
3645 | SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon, | |
2167114c | 3646 | u64 persistent_fid, u64 volatile_fid, int level) |
34f62640 SF |
3647 | { |
3648 | struct smb2_query_info_rsp *rsp = NULL; | |
3649 | struct kvec iov; | |
da502f7d | 3650 | struct kvec rsp_iov; |
34f62640 | 3651 | int rc = 0; |
2167114c | 3652 | int resp_buftype, max_len, min_len; |
34f62640 | 3653 | struct cifs_ses *ses = tcon->ses; |
93012bf9 | 3654 | struct TCP_Server_Info *server = ses->server; |
34f62640 | 3655 | unsigned int rsp_len, offset; |
7fb8986e | 3656 | int flags = 0; |
34f62640 | 3657 | |
2167114c SF |
3658 | if (level == FS_DEVICE_INFORMATION) { |
3659 | max_len = sizeof(FILE_SYSTEM_DEVICE_INFO); | |
3660 | min_len = sizeof(FILE_SYSTEM_DEVICE_INFO); | |
3661 | } else if (level == FS_ATTRIBUTE_INFORMATION) { | |
3662 | max_len = sizeof(FILE_SYSTEM_ATTRIBUTE_INFO); | |
3663 | min_len = MIN_FS_ATTR_INFO_SIZE; | |
af6a12ea SF |
3664 | } else if (level == FS_SECTOR_SIZE_INFORMATION) { |
3665 | max_len = sizeof(struct smb3_fs_ss_info); | |
3666 | min_len = sizeof(struct smb3_fs_ss_info); | |
2167114c | 3667 | } else { |
af6a12ea | 3668 | cifs_dbg(FYI, "Invalid qfsinfo level %d\n", level); |
2167114c SF |
3669 | return -EINVAL; |
3670 | } | |
3671 | ||
3672 | rc = build_qfs_info_req(&iov, tcon, level, max_len, | |
34f62640 SF |
3673 | persistent_fid, volatile_fid); |
3674 | if (rc) | |
3675 | return rc; | |
3676 | ||
7fb8986e PS |
3677 | if (encryption_required(tcon)) |
3678 | flags |= CIFS_TRANSFORM_REQ; | |
3679 | ||
b2fb7fec | 3680 | rc = smb2_send_recv(xid, ses, &iov, 1, &resp_buftype, flags, &rsp_iov); |
da502f7d | 3681 | cifs_small_buf_release(iov.iov_base); |
34f62640 SF |
3682 | if (rc) { |
3683 | cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE); | |
3684 | goto qfsattr_exit; | |
3685 | } | |
da502f7d | 3686 | rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; |
34f62640 SF |
3687 | |
3688 | rsp_len = le32_to_cpu(rsp->OutputBufferLength); | |
3689 | offset = le16_to_cpu(rsp->OutputBufferOffset); | |
c1596ff5 | 3690 | rc = validate_iov(server, offset, rsp_len, &rsp_iov, min_len); |
2167114c SF |
3691 | if (rc) |
3692 | goto qfsattr_exit; | |
3693 | ||
3694 | if (level == FS_ATTRIBUTE_INFORMATION) | |
93012bf9 | 3695 | memcpy(&tcon->fsAttrInfo, server->vals->header_preamble_size + offset |
34f62640 | 3696 | + (char *)&rsp->hdr, min_t(unsigned int, |
2167114c SF |
3697 | rsp_len, max_len)); |
3698 | else if (level == FS_DEVICE_INFORMATION) | |
93012bf9 | 3699 | memcpy(&tcon->fsDevInfo, server->vals->header_preamble_size + offset |
2167114c | 3700 | + (char *)&rsp->hdr, sizeof(FILE_SYSTEM_DEVICE_INFO)); |
af6a12ea SF |
3701 | else if (level == FS_SECTOR_SIZE_INFORMATION) { |
3702 | struct smb3_fs_ss_info *ss_info = (struct smb3_fs_ss_info *) | |
93012bf9 | 3703 | (server->vals->header_preamble_size + offset + (char *)&rsp->hdr); |
af6a12ea SF |
3704 | tcon->ss_flags = le32_to_cpu(ss_info->Flags); |
3705 | tcon->perf_sector_size = | |
3706 | le32_to_cpu(ss_info->PhysicalBytesPerSectorForPerf); | |
3707 | } | |
34f62640 SF |
3708 | |
3709 | qfsattr_exit: | |
da502f7d | 3710 | free_rsp_buf(resp_buftype, rsp_iov.iov_base); |
6fc05c25 PS |
3711 | return rc; |
3712 | } | |
f7ba7fe6 PS |
3713 | |
3714 | int | |
3715 | smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon, | |
3716 | const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid, | |
3717 | const __u32 num_lock, struct smb2_lock_element *buf) | |
3718 | { | |
3719 | int rc = 0; | |
3720 | struct smb2_lock_req *req = NULL; | |
3721 | struct kvec iov[2]; | |
da502f7d | 3722 | struct kvec rsp_iov; |
f7ba7fe6 PS |
3723 | int resp_buf_type; |
3724 | unsigned int count; | |
7fb8986e | 3725 | int flags = CIFS_NO_RESP; |
ced93679 | 3726 | unsigned int total_len; |
f7ba7fe6 | 3727 | |
f96637be | 3728 | cifs_dbg(FYI, "smb2_lockv num lock %d\n", num_lock); |
f7ba7fe6 | 3729 | |
ced93679 | 3730 | rc = smb2_plain_req_init(SMB2_LOCK, tcon, (void **) &req, &total_len); |
f7ba7fe6 PS |
3731 | if (rc) |
3732 | return rc; | |
3733 | ||
7fb8986e PS |
3734 | if (encryption_required(tcon)) |
3735 | flags |= CIFS_TRANSFORM_REQ; | |
3736 | ||
ced93679 | 3737 | req->sync_hdr.ProcessId = cpu_to_le32(pid); |
f7ba7fe6 PS |
3738 | req->LockCount = cpu_to_le16(num_lock); |
3739 | ||
3740 | req->PersistentFileId = persist_fid; | |
3741 | req->VolatileFileId = volatile_fid; | |
3742 | ||
3743 | count = num_lock * sizeof(struct smb2_lock_element); | |
f7ba7fe6 PS |
3744 | |
3745 | iov[0].iov_base = (char *)req; | |
ced93679 | 3746 | iov[0].iov_len = total_len - sizeof(struct smb2_lock_element); |
f7ba7fe6 PS |
3747 | iov[1].iov_base = (char *)buf; |
3748 | iov[1].iov_len = count; | |
3749 | ||
3750 | cifs_stats_inc(&tcon->stats.cifs_stats.num_locks); | |
ced93679 RS |
3751 | rc = smb2_send_recv(xid, tcon->ses, iov, 2, &resp_buf_type, flags, |
3752 | &rsp_iov); | |
da502f7d | 3753 | cifs_small_buf_release(req); |
f7ba7fe6 | 3754 | if (rc) { |
f96637be | 3755 | cifs_dbg(FYI, "Send error in smb2_lockv = %d\n", rc); |
f7ba7fe6 PS |
3756 | cifs_stats_fail_inc(tcon, SMB2_LOCK_HE); |
3757 | } | |
3758 | ||
3759 | return rc; | |
3760 | } | |
3761 | ||
3762 | int | |
3763 | SMB2_lock(const unsigned int xid, struct cifs_tcon *tcon, | |
3764 | const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid, | |
3765 | const __u64 length, const __u64 offset, const __u32 lock_flags, | |
3766 | const bool wait) | |
3767 | { | |
3768 | struct smb2_lock_element lock; | |
3769 | ||
3770 | lock.Offset = cpu_to_le64(offset); | |
3771 | lock.Length = cpu_to_le64(length); | |
3772 | lock.Flags = cpu_to_le32(lock_flags); | |
3773 | if (!wait && lock_flags != SMB2_LOCKFLAG_UNLOCK) | |
3774 | lock.Flags |= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY); | |
3775 | ||
3776 | return smb2_lockv(xid, tcon, persist_fid, volatile_fid, pid, 1, &lock); | |
3777 | } | |
0822f514 PS |
3778 | |
3779 | int | |
3780 | SMB2_lease_break(const unsigned int xid, struct cifs_tcon *tcon, | |
3781 | __u8 *lease_key, const __le32 lease_state) | |
3782 | { | |
3783 | int rc; | |
3784 | struct smb2_lease_ack *req = NULL; | |
8eb7998e | 3785 | struct cifs_ses *ses = tcon->ses; |
7fb8986e | 3786 | int flags = CIFS_OBREAK_OP; |
8eb7998e RS |
3787 | unsigned int total_len; |
3788 | struct kvec iov[1]; | |
3789 | struct kvec rsp_iov; | |
3790 | int resp_buf_type; | |
0822f514 | 3791 | |
f96637be | 3792 | cifs_dbg(FYI, "SMB2_lease_break\n"); |
8eb7998e RS |
3793 | rc = smb2_plain_req_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req, |
3794 | &total_len); | |
0822f514 PS |
3795 | if (rc) |
3796 | return rc; | |
3797 | ||
7fb8986e PS |
3798 | if (encryption_required(tcon)) |
3799 | flags |= CIFS_TRANSFORM_REQ; | |
3800 | ||
8eb7998e | 3801 | req->sync_hdr.CreditRequest = cpu_to_le16(1); |
0822f514 | 3802 | req->StructureSize = cpu_to_le16(36); |
8eb7998e | 3803 | total_len += 12; |
0822f514 PS |
3804 | |
3805 | memcpy(req->LeaseKey, lease_key, 16); | |
3806 | req->LeaseState = lease_state; | |
3807 | ||
8eb7998e RS |
3808 | flags |= CIFS_NO_RESP; |
3809 | ||
3810 | iov[0].iov_base = (char *)req; | |
3811 | iov[0].iov_len = total_len; | |
3812 | ||
3813 | rc = smb2_send_recv(xid, ses, iov, 1, &resp_buf_type, flags, &rsp_iov); | |
da502f7d | 3814 | cifs_small_buf_release(req); |
0822f514 PS |
3815 | |
3816 | if (rc) { | |
3817 | cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE); | |
f96637be | 3818 | cifs_dbg(FYI, "Send error in Lease Break = %d\n", rc); |
0822f514 PS |
3819 | } |
3820 | ||
3821 | return rc; | |
3822 | } |