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ec2e4523 PS |
1 | /* |
2 | * fs/cifs/smb2pdu.c | |
3 | * | |
4 | * Copyright (C) International Business Machines Corp., 2009, 2011 | |
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> |
33319141 | 36 | #include <linux/pagemap.h> |
ec2e4523 PS |
37 | #include <linux/xattr.h> |
38 | #include "smb2pdu.h" | |
39 | #include "cifsglob.h" | |
40 | #include "cifsacl.h" | |
41 | #include "cifsproto.h" | |
42 | #include "smb2proto.h" | |
43 | #include "cifs_unicode.h" | |
44 | #include "cifs_debug.h" | |
45 | #include "ntlmssp.h" | |
46 | #include "smb2status.h" | |
09a4707e | 47 | #include "smb2glob.h" |
d324f08d | 48 | #include "cifspdu.h" |
ec2e4523 PS |
49 | |
50 | /* | |
51 | * The following table defines the expected "StructureSize" of SMB2 requests | |
52 | * in order by SMB2 command. This is similar to "wct" in SMB/CIFS requests. | |
53 | * | |
54 | * Note that commands are defined in smb2pdu.h in le16 but the array below is | |
55 | * indexed by command in host byte order. | |
56 | */ | |
57 | static const int smb2_req_struct_sizes[NUMBER_OF_SMB2_COMMANDS] = { | |
58 | /* SMB2_NEGOTIATE */ 36, | |
59 | /* SMB2_SESSION_SETUP */ 25, | |
60 | /* SMB2_LOGOFF */ 4, | |
61 | /* SMB2_TREE_CONNECT */ 9, | |
62 | /* SMB2_TREE_DISCONNECT */ 4, | |
63 | /* SMB2_CREATE */ 57, | |
64 | /* SMB2_CLOSE */ 24, | |
65 | /* SMB2_FLUSH */ 24, | |
66 | /* SMB2_READ */ 49, | |
67 | /* SMB2_WRITE */ 49, | |
68 | /* SMB2_LOCK */ 48, | |
69 | /* SMB2_IOCTL */ 57, | |
70 | /* SMB2_CANCEL */ 4, | |
71 | /* SMB2_ECHO */ 4, | |
72 | /* SMB2_QUERY_DIRECTORY */ 33, | |
73 | /* SMB2_CHANGE_NOTIFY */ 32, | |
74 | /* SMB2_QUERY_INFO */ 41, | |
75 | /* SMB2_SET_INFO */ 33, | |
76 | /* SMB2_OPLOCK_BREAK */ 24 /* BB this is 36 for LEASE_BREAK variant */ | |
77 | }; | |
78 | ||
79 | ||
80 | static void | |
81 | smb2_hdr_assemble(struct smb2_hdr *hdr, __le16 smb2_cmd /* command */ , | |
82 | const struct cifs_tcon *tcon) | |
83 | { | |
84 | struct smb2_pdu *pdu = (struct smb2_pdu *)hdr; | |
85 | char *temp = (char *)hdr; | |
86 | /* lookup word count ie StructureSize from table */ | |
87 | __u16 parmsize = smb2_req_struct_sizes[le16_to_cpu(smb2_cmd)]; | |
88 | ||
89 | /* | |
90 | * smaller than SMALL_BUFFER_SIZE but bigger than fixed area of | |
91 | * largest operations (Create) | |
92 | */ | |
93 | memset(temp, 0, 256); | |
94 | ||
95 | /* Note this is only network field converted to big endian */ | |
96 | hdr->smb2_buf_length = cpu_to_be32(parmsize + sizeof(struct smb2_hdr) | |
97 | - 4 /* RFC 1001 length field itself not counted */); | |
98 | ||
99 | hdr->ProtocolId[0] = 0xFE; | |
100 | hdr->ProtocolId[1] = 'S'; | |
101 | hdr->ProtocolId[2] = 'M'; | |
102 | hdr->ProtocolId[3] = 'B'; | |
103 | hdr->StructureSize = cpu_to_le16(64); | |
104 | hdr->Command = smb2_cmd; | |
105 | hdr->CreditRequest = cpu_to_le16(2); /* BB make this dynamic */ | |
106 | hdr->ProcessId = cpu_to_le32((__u16)current->tgid); | |
107 | ||
108 | if (!tcon) | |
109 | goto out; | |
110 | ||
111 | hdr->TreeId = tcon->tid; | |
112 | /* Uid is not converted */ | |
113 | if (tcon->ses) | |
114 | hdr->SessionId = tcon->ses->Suid; | |
115 | /* BB check following DFS flags BB */ | |
116 | /* BB do we have to add check for SHI1005_FLAGS_DFS_ROOT too? */ | |
faaf946a PS |
117 | if (tcon->share_flags & SHI1005_FLAGS_DFS) |
118 | hdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS; | |
ec2e4523 PS |
119 | /* BB how does SMB2 do case sensitive? */ |
120 | /* if (tcon->nocase) | |
121 | hdr->Flags |= SMBFLG_CASELESS; */ | |
3c1bf7e4 | 122 | if (tcon->ses && tcon->ses->server && |
ec2e4523 | 123 | (tcon->ses->server->sec_mode & SECMODE_SIGN_REQUIRED)) |
3c1bf7e4 | 124 | hdr->Flags |= SMB2_FLAGS_SIGNED; |
ec2e4523 PS |
125 | out: |
126 | pdu->StructureSize2 = cpu_to_le16(parmsize); | |
127 | return; | |
128 | } | |
129 | ||
130 | static int | |
131 | smb2_reconnect(__le16 smb2_command, struct cifs_tcon *tcon) | |
132 | { | |
133 | int rc = 0; | |
aa24d1e9 PS |
134 | struct nls_table *nls_codepage; |
135 | struct cifs_ses *ses; | |
136 | struct TCP_Server_Info *server; | |
137 | ||
138 | /* | |
139 | * SMB2s NegProt, SessSetup, Logoff do not have tcon yet so | |
140 | * check for tcp and smb session status done differently | |
141 | * for those three - in the calling routine. | |
142 | */ | |
143 | if (tcon == NULL) | |
144 | return rc; | |
145 | ||
146 | if (smb2_command == SMB2_TREE_CONNECT) | |
147 | return rc; | |
148 | ||
149 | if (tcon->tidStatus == CifsExiting) { | |
150 | /* | |
151 | * only tree disconnect, open, and write, | |
152 | * (and ulogoff which does not have tcon) | |
153 | * are allowed as we start force umount. | |
154 | */ | |
155 | if ((smb2_command != SMB2_WRITE) && | |
156 | (smb2_command != SMB2_CREATE) && | |
157 | (smb2_command != SMB2_TREE_DISCONNECT)) { | |
158 | cFYI(1, "can not send cmd %d while umounting", | |
159 | smb2_command); | |
160 | return -ENODEV; | |
161 | } | |
162 | } | |
163 | if ((!tcon->ses) || (tcon->ses->status == CifsExiting) || | |
164 | (!tcon->ses->server)) | |
165 | return -EIO; | |
166 | ||
167 | ses = tcon->ses; | |
168 | server = ses->server; | |
169 | ||
170 | /* | |
171 | * Give demultiplex thread up to 10 seconds to reconnect, should be | |
172 | * greater than cifs socket timeout which is 7 seconds | |
173 | */ | |
174 | while (server->tcpStatus == CifsNeedReconnect) { | |
175 | /* | |
176 | * Return to caller for TREE_DISCONNECT and LOGOFF and CLOSE | |
177 | * here since they are implicitly done when session drops. | |
178 | */ | |
179 | switch (smb2_command) { | |
180 | /* | |
181 | * BB Should we keep oplock break and add flush to exceptions? | |
182 | */ | |
183 | case SMB2_TREE_DISCONNECT: | |
184 | case SMB2_CANCEL: | |
185 | case SMB2_CLOSE: | |
186 | case SMB2_OPLOCK_BREAK: | |
187 | return -EAGAIN; | |
188 | } | |
189 | ||
190 | wait_event_interruptible_timeout(server->response_q, | |
191 | (server->tcpStatus != CifsNeedReconnect), 10 * HZ); | |
192 | ||
193 | /* are we still trying to reconnect? */ | |
194 | if (server->tcpStatus != CifsNeedReconnect) | |
195 | break; | |
196 | ||
197 | /* | |
198 | * on "soft" mounts we wait once. Hard mounts keep | |
199 | * retrying until process is killed or server comes | |
200 | * back on-line | |
201 | */ | |
202 | if (!tcon->retry) { | |
203 | cFYI(1, "gave up waiting on reconnect in smb_init"); | |
204 | return -EHOSTDOWN; | |
205 | } | |
206 | } | |
207 | ||
208 | if (!tcon->ses->need_reconnect && !tcon->need_reconnect) | |
209 | return rc; | |
210 | ||
211 | nls_codepage = load_nls_default(); | |
212 | ||
213 | /* | |
214 | * need to prevent multiple threads trying to simultaneously reconnect | |
215 | * the same SMB session | |
216 | */ | |
217 | mutex_lock(&tcon->ses->session_mutex); | |
218 | rc = cifs_negotiate_protocol(0, tcon->ses); | |
219 | if (!rc && tcon->ses->need_reconnect) | |
220 | rc = cifs_setup_session(0, tcon->ses, nls_codepage); | |
221 | ||
222 | if (rc || !tcon->need_reconnect) { | |
223 | mutex_unlock(&tcon->ses->session_mutex); | |
224 | goto out; | |
225 | } | |
226 | ||
227 | cifs_mark_open_files_invalid(tcon); | |
228 | rc = SMB2_tcon(0, tcon->ses, tcon->treeName, tcon, nls_codepage); | |
229 | mutex_unlock(&tcon->ses->session_mutex); | |
230 | cFYI(1, "reconnect tcon rc = %d", rc); | |
231 | if (rc) | |
232 | goto out; | |
233 | atomic_inc(&tconInfoReconnectCount); | |
234 | /* | |
235 | * BB FIXME add code to check if wsize needs update due to negotiated | |
236 | * smb buffer size shrinking. | |
237 | */ | |
238 | out: | |
239 | /* | |
240 | * Check if handle based operation so we know whether we can continue | |
241 | * or not without returning to caller to reset file handle. | |
242 | */ | |
243 | /* | |
244 | * BB Is flush done by server on drop of tcp session? Should we special | |
245 | * case it and skip above? | |
246 | */ | |
247 | switch (smb2_command) { | |
248 | case SMB2_FLUSH: | |
249 | case SMB2_READ: | |
250 | case SMB2_WRITE: | |
251 | case SMB2_LOCK: | |
252 | case SMB2_IOCTL: | |
253 | case SMB2_QUERY_DIRECTORY: | |
254 | case SMB2_CHANGE_NOTIFY: | |
255 | case SMB2_QUERY_INFO: | |
256 | case SMB2_SET_INFO: | |
257 | return -EAGAIN; | |
258 | } | |
259 | unload_nls(nls_codepage); | |
ec2e4523 PS |
260 | return rc; |
261 | } | |
262 | ||
263 | /* | |
264 | * Allocate and return pointer to an SMB request hdr, and set basic | |
265 | * SMB information in the SMB header. If the return code is zero, this | |
266 | * function must have filled in request_buf pointer. | |
267 | */ | |
268 | static int | |
269 | small_smb2_init(__le16 smb2_command, struct cifs_tcon *tcon, | |
270 | void **request_buf) | |
271 | { | |
272 | int rc = 0; | |
273 | ||
274 | rc = smb2_reconnect(smb2_command, tcon); | |
275 | if (rc) | |
276 | return rc; | |
277 | ||
278 | /* BB eventually switch this to SMB2 specific small buf size */ | |
279 | *request_buf = cifs_small_buf_get(); | |
280 | if (*request_buf == NULL) { | |
281 | /* BB should we add a retry in here if not a writepage? */ | |
282 | return -ENOMEM; | |
283 | } | |
284 | ||
285 | smb2_hdr_assemble((struct smb2_hdr *) *request_buf, smb2_command, tcon); | |
286 | ||
287 | if (tcon != NULL) { | |
288 | #ifdef CONFIG_CIFS_STATS2 | |
ec2e4523 PS |
289 | uint16_t com_code = le16_to_cpu(smb2_command); |
290 | cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_sent[com_code]); | |
ec2e4523 PS |
291 | #endif |
292 | cifs_stats_inc(&tcon->num_smbs_sent); | |
293 | } | |
294 | ||
295 | return rc; | |
296 | } | |
297 | ||
298 | static void | |
299 | free_rsp_buf(int resp_buftype, void *rsp) | |
300 | { | |
301 | if (resp_buftype == CIFS_SMALL_BUFFER) | |
302 | cifs_small_buf_release(rsp); | |
303 | else if (resp_buftype == CIFS_LARGE_BUFFER) | |
304 | cifs_buf_release(rsp); | |
305 | } | |
306 | ||
307 | #define SMB2_NUM_PROT 1 | |
308 | ||
309 | #define SMB2_PROT 0 | |
310 | #define SMB21_PROT 1 | |
311 | #define BAD_PROT 0xFFFF | |
312 | ||
313 | #define SMB2_PROT_ID 0x0202 | |
314 | #define SMB21_PROT_ID 0x0210 | |
315 | #define BAD_PROT_ID 0xFFFF | |
316 | ||
317 | static struct { | |
318 | int index; | |
319 | __le16 name; | |
320 | } smb2protocols[] = { | |
321 | {SMB2_PROT, cpu_to_le16(SMB2_PROT_ID)}, | |
322 | {SMB21_PROT, cpu_to_le16(SMB21_PROT_ID)}, | |
323 | {BAD_PROT, cpu_to_le16(BAD_PROT_ID)} | |
324 | }; | |
325 | ||
326 | /* | |
327 | * | |
328 | * SMB2 Worker functions follow: | |
329 | * | |
330 | * The general structure of the worker functions is: | |
331 | * 1) Call smb2_init (assembles SMB2 header) | |
332 | * 2) Initialize SMB2 command specific fields in fixed length area of SMB | |
333 | * 3) Call smb_sendrcv2 (sends request on socket and waits for response) | |
334 | * 4) Decode SMB2 command specific fields in the fixed length area | |
335 | * 5) Decode variable length data area (if any for this SMB2 command type) | |
336 | * 6) Call free smb buffer | |
337 | * 7) return | |
338 | * | |
339 | */ | |
340 | ||
341 | int | |
342 | SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses) | |
343 | { | |
344 | struct smb2_negotiate_req *req; | |
345 | struct smb2_negotiate_rsp *rsp; | |
346 | struct kvec iov[1]; | |
347 | int rc = 0; | |
348 | int resp_buftype; | |
349 | struct TCP_Server_Info *server; | |
350 | unsigned int sec_flags; | |
351 | u16 i; | |
352 | u16 temp = 0; | |
353 | int blob_offset, blob_length; | |
354 | char *security_blob; | |
355 | int flags = CIFS_NEG_OP; | |
356 | ||
357 | cFYI(1, "Negotiate protocol"); | |
358 | ||
359 | if (ses->server) | |
360 | server = ses->server; | |
361 | else { | |
362 | rc = -EIO; | |
363 | return rc; | |
364 | } | |
365 | ||
366 | rc = small_smb2_init(SMB2_NEGOTIATE, NULL, (void **) &req); | |
367 | if (rc) | |
368 | return rc; | |
369 | ||
370 | /* if any of auth flags (ie not sign or seal) are overriden use them */ | |
371 | if (ses->overrideSecFlg & (~(CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL))) | |
372 | sec_flags = ses->overrideSecFlg; /* BB FIXME fix sign flags?*/ | |
373 | else /* if override flags set only sign/seal OR them with global auth */ | |
374 | sec_flags = global_secflags | ses->overrideSecFlg; | |
375 | ||
376 | cFYI(1, "sec_flags 0x%x", sec_flags); | |
377 | ||
378 | req->hdr.SessionId = 0; | |
379 | ||
380 | for (i = 0; i < SMB2_NUM_PROT; i++) | |
381 | req->Dialects[i] = smb2protocols[i].name; | |
382 | ||
383 | req->DialectCount = cpu_to_le16(i); | |
384 | inc_rfc1001_len(req, i * 2); | |
385 | ||
386 | /* only one of SMB2 signing flags may be set in SMB2 request */ | |
387 | if ((sec_flags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN) | |
388 | temp = SMB2_NEGOTIATE_SIGNING_REQUIRED; | |
389 | else if (sec_flags & CIFSSEC_MAY_SIGN) /* MAY_SIGN is a single flag */ | |
390 | temp = SMB2_NEGOTIATE_SIGNING_ENABLED; | |
391 | ||
392 | req->SecurityMode = cpu_to_le16(temp); | |
393 | ||
394 | req->Capabilities = cpu_to_le32(SMB2_GLOBAL_CAP_DFS); | |
395 | ||
396 | iov[0].iov_base = (char *)req; | |
397 | /* 4 for rfc1002 length field */ | |
398 | iov[0].iov_len = get_rfc1002_length(req) + 4; | |
399 | ||
400 | rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, flags); | |
401 | ||
402 | rsp = (struct smb2_negotiate_rsp *)iov[0].iov_base; | |
403 | /* | |
404 | * No tcon so can't do | |
405 | * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]); | |
406 | */ | |
407 | if (rc != 0) | |
408 | goto neg_exit; | |
409 | ||
410 | if (rsp == NULL) { | |
411 | rc = -EIO; | |
412 | goto neg_exit; | |
413 | } | |
414 | ||
415 | cFYI(1, "mode 0x%x", rsp->SecurityMode); | |
416 | ||
417 | if (rsp->DialectRevision == smb2protocols[SMB21_PROT].name) | |
418 | cFYI(1, "negotiated smb2.1 dialect"); | |
419 | else if (rsp->DialectRevision == smb2protocols[SMB2_PROT].name) | |
420 | cFYI(1, "negotiated smb2 dialect"); | |
421 | else { | |
422 | cERROR(1, "Illegal dialect returned by server %d", | |
423 | le16_to_cpu(rsp->DialectRevision)); | |
424 | rc = -EIO; | |
425 | goto neg_exit; | |
426 | } | |
427 | server->dialect = le16_to_cpu(rsp->DialectRevision); | |
428 | ||
429 | server->maxBuf = le32_to_cpu(rsp->MaxTransactSize); | |
430 | server->max_read = le32_to_cpu(rsp->MaxReadSize); | |
431 | server->max_write = le32_to_cpu(rsp->MaxWriteSize); | |
432 | /* BB Do we need to validate the SecurityMode? */ | |
433 | server->sec_mode = le16_to_cpu(rsp->SecurityMode); | |
434 | server->capabilities = le32_to_cpu(rsp->Capabilities); | |
29e20f9c PS |
435 | /* Internal types */ |
436 | server->capabilities |= SMB2_NT_FIND | SMB2_LARGE_FILES; | |
ec2e4523 PS |
437 | |
438 | security_blob = smb2_get_data_area_len(&blob_offset, &blob_length, | |
439 | &rsp->hdr); | |
440 | if (blob_length == 0) { | |
441 | cERROR(1, "missing security blob on negprot"); | |
442 | rc = -EIO; | |
443 | goto neg_exit; | |
444 | } | |
3c1bf7e4 PS |
445 | |
446 | cFYI(1, "sec_flags 0x%x", sec_flags); | |
447 | if (sec_flags & CIFSSEC_MUST_SIGN) { | |
448 | cFYI(1, "Signing required"); | |
449 | if (!(server->sec_mode & (SMB2_NEGOTIATE_SIGNING_REQUIRED | | |
450 | SMB2_NEGOTIATE_SIGNING_ENABLED))) { | |
451 | cERROR(1, "signing required but server lacks support"); | |
452 | rc = -EOPNOTSUPP; | |
453 | goto neg_exit; | |
454 | } | |
455 | server->sec_mode |= SECMODE_SIGN_REQUIRED; | |
456 | } else if (sec_flags & CIFSSEC_MAY_SIGN) { | |
457 | cFYI(1, "Signing optional"); | |
458 | if (server->sec_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED) { | |
459 | cFYI(1, "Server requires signing"); | |
460 | server->sec_mode |= SECMODE_SIGN_REQUIRED; | |
461 | } else { | |
462 | server->sec_mode &= | |
463 | ~(SECMODE_SIGN_ENABLED | SECMODE_SIGN_REQUIRED); | |
464 | } | |
465 | } else { | |
466 | cFYI(1, "Signing disabled"); | |
467 | if (server->sec_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED) { | |
468 | cERROR(1, "Server requires packet signing to be enabled" | |
469 | " in /proc/fs/cifs/SecurityFlags."); | |
470 | rc = -EOPNOTSUPP; | |
471 | goto neg_exit; | |
472 | } | |
473 | server->sec_mode &= | |
474 | ~(SECMODE_SIGN_ENABLED | SECMODE_SIGN_REQUIRED); | |
475 | } | |
476 | ||
ec2e4523 PS |
477 | #ifdef CONFIG_SMB2_ASN1 /* BB REMOVEME when updated asn1.c ready */ |
478 | rc = decode_neg_token_init(security_blob, blob_length, | |
479 | &server->sec_type); | |
480 | if (rc == 1) | |
481 | rc = 0; | |
482 | else if (rc == 0) { | |
483 | rc = -EIO; | |
484 | goto neg_exit; | |
485 | } | |
486 | #endif | |
487 | ||
488 | neg_exit: | |
489 | free_rsp_buf(resp_buftype, rsp); | |
490 | return rc; | |
491 | } | |
5478f9ba PS |
492 | |
493 | int | |
494 | SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses, | |
495 | const struct nls_table *nls_cp) | |
496 | { | |
497 | struct smb2_sess_setup_req *req; | |
498 | struct smb2_sess_setup_rsp *rsp = NULL; | |
499 | struct kvec iov[2]; | |
500 | int rc = 0; | |
501 | int resp_buftype; | |
502 | __le32 phase = NtLmNegotiate; /* NTLMSSP, if needed, is multistage */ | |
503 | struct TCP_Server_Info *server; | |
504 | unsigned int sec_flags; | |
505 | u8 temp = 0; | |
506 | u16 blob_length = 0; | |
507 | char *security_blob; | |
508 | char *ntlmssp_blob = NULL; | |
509 | bool use_spnego = false; /* else use raw ntlmssp */ | |
510 | ||
511 | cFYI(1, "Session Setup"); | |
512 | ||
513 | if (ses->server) | |
514 | server = ses->server; | |
515 | else { | |
516 | rc = -EIO; | |
517 | return rc; | |
518 | } | |
519 | ||
520 | /* | |
521 | * If memory allocation is successful, caller of this function | |
522 | * frees it. | |
523 | */ | |
524 | ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL); | |
525 | if (!ses->ntlmssp) | |
526 | return -ENOMEM; | |
527 | ||
528 | ses->server->secType = RawNTLMSSP; | |
529 | ||
530 | ssetup_ntlmssp_authenticate: | |
531 | if (phase == NtLmChallenge) | |
532 | phase = NtLmAuthenticate; /* if ntlmssp, now final phase */ | |
533 | ||
534 | rc = small_smb2_init(SMB2_SESSION_SETUP, NULL, (void **) &req); | |
535 | if (rc) | |
536 | return rc; | |
537 | ||
538 | /* if any of auth flags (ie not sign or seal) are overriden use them */ | |
539 | if (ses->overrideSecFlg & (~(CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL))) | |
540 | sec_flags = ses->overrideSecFlg; /* BB FIXME fix sign flags?*/ | |
541 | else /* if override flags set only sign/seal OR them with global auth */ | |
542 | sec_flags = global_secflags | ses->overrideSecFlg; | |
543 | ||
544 | cFYI(1, "sec_flags 0x%x", sec_flags); | |
545 | ||
546 | req->hdr.SessionId = 0; /* First session, not a reauthenticate */ | |
547 | req->VcNumber = 0; /* MBZ */ | |
548 | /* to enable echos and oplocks */ | |
549 | req->hdr.CreditRequest = cpu_to_le16(3); | |
550 | ||
551 | /* only one of SMB2 signing flags may be set in SMB2 request */ | |
552 | if ((sec_flags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN) | |
553 | temp = SMB2_NEGOTIATE_SIGNING_REQUIRED; | |
554 | else if (ses->server->sec_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED) | |
555 | temp = SMB2_NEGOTIATE_SIGNING_REQUIRED; | |
556 | else if (sec_flags & CIFSSEC_MAY_SIGN) /* MAY_SIGN is a single flag */ | |
557 | temp = SMB2_NEGOTIATE_SIGNING_ENABLED; | |
558 | ||
559 | req->SecurityMode = temp; | |
560 | req->Capabilities = 0; | |
561 | req->Channel = 0; /* MBZ */ | |
562 | ||
563 | iov[0].iov_base = (char *)req; | |
564 | /* 4 for rfc1002 length field and 1 for pad */ | |
565 | iov[0].iov_len = get_rfc1002_length(req) + 4 - 1; | |
566 | if (phase == NtLmNegotiate) { | |
567 | ntlmssp_blob = kmalloc(sizeof(struct _NEGOTIATE_MESSAGE), | |
568 | GFP_KERNEL); | |
569 | if (ntlmssp_blob == NULL) { | |
570 | rc = -ENOMEM; | |
571 | goto ssetup_exit; | |
572 | } | |
573 | build_ntlmssp_negotiate_blob(ntlmssp_blob, ses); | |
574 | if (use_spnego) { | |
575 | /* blob_length = build_spnego_ntlmssp_blob( | |
576 | &security_blob, | |
577 | sizeof(struct _NEGOTIATE_MESSAGE), | |
578 | ntlmssp_blob); */ | |
579 | /* BB eventually need to add this */ | |
580 | cERROR(1, "spnego not supported for SMB2 yet"); | |
581 | rc = -EOPNOTSUPP; | |
582 | kfree(ntlmssp_blob); | |
583 | goto ssetup_exit; | |
584 | } else { | |
585 | blob_length = sizeof(struct _NEGOTIATE_MESSAGE); | |
586 | /* with raw NTLMSSP we don't encapsulate in SPNEGO */ | |
587 | security_blob = ntlmssp_blob; | |
588 | } | |
589 | } else if (phase == NtLmAuthenticate) { | |
590 | req->hdr.SessionId = ses->Suid; | |
591 | ntlmssp_blob = kzalloc(sizeof(struct _NEGOTIATE_MESSAGE) + 500, | |
592 | GFP_KERNEL); | |
593 | if (ntlmssp_blob == NULL) { | |
594 | cERROR(1, "failed to malloc ntlmssp blob"); | |
595 | rc = -ENOMEM; | |
596 | goto ssetup_exit; | |
597 | } | |
598 | rc = build_ntlmssp_auth_blob(ntlmssp_blob, &blob_length, ses, | |
599 | nls_cp); | |
600 | if (rc) { | |
601 | cFYI(1, "build_ntlmssp_auth_blob failed %d", rc); | |
602 | goto ssetup_exit; /* BB double check error handling */ | |
603 | } | |
604 | if (use_spnego) { | |
605 | /* blob_length = build_spnego_ntlmssp_blob( | |
606 | &security_blob, | |
607 | blob_length, | |
608 | ntlmssp_blob); */ | |
609 | cERROR(1, "spnego not supported for SMB2 yet"); | |
610 | rc = -EOPNOTSUPP; | |
611 | kfree(ntlmssp_blob); | |
612 | goto ssetup_exit; | |
613 | } else { | |
614 | security_blob = ntlmssp_blob; | |
615 | } | |
616 | } else { | |
617 | cERROR(1, "illegal ntlmssp phase"); | |
618 | rc = -EIO; | |
619 | goto ssetup_exit; | |
620 | } | |
621 | ||
622 | /* Testing shows that buffer offset must be at location of Buffer[0] */ | |
623 | req->SecurityBufferOffset = | |
624 | cpu_to_le16(sizeof(struct smb2_sess_setup_req) - | |
625 | 1 /* pad */ - 4 /* rfc1001 len */); | |
626 | req->SecurityBufferLength = cpu_to_le16(blob_length); | |
627 | iov[1].iov_base = security_blob; | |
628 | iov[1].iov_len = blob_length; | |
629 | ||
630 | inc_rfc1001_len(req, blob_length - 1 /* pad */); | |
631 | ||
632 | /* BB add code to build os and lm fields */ | |
633 | ||
634 | rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, CIFS_LOG_ERROR); | |
635 | ||
636 | kfree(security_blob); | |
637 | rsp = (struct smb2_sess_setup_rsp *)iov[0].iov_base; | |
638 | if (rsp->hdr.Status == STATUS_MORE_PROCESSING_REQUIRED) { | |
639 | if (phase != NtLmNegotiate) { | |
640 | cERROR(1, "Unexpected more processing error"); | |
641 | goto ssetup_exit; | |
642 | } | |
643 | if (offsetof(struct smb2_sess_setup_rsp, Buffer) - 4 != | |
644 | le16_to_cpu(rsp->SecurityBufferOffset)) { | |
645 | cERROR(1, "Invalid security buffer offset %d", | |
646 | le16_to_cpu(rsp->SecurityBufferOffset)); | |
647 | rc = -EIO; | |
648 | goto ssetup_exit; | |
649 | } | |
650 | ||
651 | /* NTLMSSP Negotiate sent now processing challenge (response) */ | |
652 | phase = NtLmChallenge; /* process ntlmssp challenge */ | |
653 | rc = 0; /* MORE_PROCESSING is not an error here but expected */ | |
654 | ses->Suid = rsp->hdr.SessionId; | |
655 | rc = decode_ntlmssp_challenge(rsp->Buffer, | |
656 | le16_to_cpu(rsp->SecurityBufferLength), ses); | |
657 | } | |
658 | ||
659 | /* | |
660 | * BB eventually add code for SPNEGO decoding of NtlmChallenge blob, | |
661 | * but at least the raw NTLMSSP case works. | |
662 | */ | |
663 | /* | |
664 | * No tcon so can't do | |
665 | * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]); | |
666 | */ | |
667 | if (rc != 0) | |
668 | goto ssetup_exit; | |
669 | ||
670 | if (rsp == NULL) { | |
671 | rc = -EIO; | |
672 | goto ssetup_exit; | |
673 | } | |
674 | ||
675 | ses->session_flags = le16_to_cpu(rsp->SessionFlags); | |
676 | ssetup_exit: | |
677 | free_rsp_buf(resp_buftype, rsp); | |
678 | ||
679 | /* if ntlmssp, and negotiate succeeded, proceed to authenticate phase */ | |
680 | if ((phase == NtLmChallenge) && (rc == 0)) | |
681 | goto ssetup_ntlmssp_authenticate; | |
682 | return rc; | |
683 | } | |
684 | ||
685 | int | |
686 | SMB2_logoff(const unsigned int xid, struct cifs_ses *ses) | |
687 | { | |
688 | struct smb2_logoff_req *req; /* response is also trivial struct */ | |
689 | int rc = 0; | |
690 | struct TCP_Server_Info *server; | |
691 | ||
692 | cFYI(1, "disconnect session %p", ses); | |
693 | ||
694 | if (ses && (ses->server)) | |
695 | server = ses->server; | |
696 | else | |
697 | return -EIO; | |
698 | ||
699 | rc = small_smb2_init(SMB2_LOGOFF, NULL, (void **) &req); | |
700 | if (rc) | |
701 | return rc; | |
702 | ||
703 | /* since no tcon, smb2_init can not do this, so do here */ | |
704 | req->hdr.SessionId = ses->Suid; | |
3c1bf7e4 PS |
705 | if (server->sec_mode & SECMODE_SIGN_REQUIRED) |
706 | req->hdr.Flags |= SMB2_FLAGS_SIGNED; | |
5478f9ba PS |
707 | |
708 | rc = SendReceiveNoRsp(xid, ses, (char *) &req->hdr, 0); | |
709 | /* | |
710 | * No tcon so can't do | |
711 | * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]); | |
712 | */ | |
713 | return rc; | |
714 | } | |
faaf946a PS |
715 | |
716 | static inline void cifs_stats_fail_inc(struct cifs_tcon *tcon, uint16_t code) | |
717 | { | |
d60622eb | 718 | cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_failed[code]); |
faaf946a PS |
719 | } |
720 | ||
721 | #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */) | |
722 | ||
723 | int | |
724 | SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree, | |
725 | struct cifs_tcon *tcon, const struct nls_table *cp) | |
726 | { | |
727 | struct smb2_tree_connect_req *req; | |
728 | struct smb2_tree_connect_rsp *rsp = NULL; | |
729 | struct kvec iov[2]; | |
730 | int rc = 0; | |
731 | int resp_buftype; | |
732 | int unc_path_len; | |
733 | struct TCP_Server_Info *server; | |
734 | __le16 *unc_path = NULL; | |
735 | ||
736 | cFYI(1, "TCON"); | |
737 | ||
738 | if ((ses->server) && tree) | |
739 | server = ses->server; | |
740 | else | |
741 | return -EIO; | |
742 | ||
743 | if (tcon && tcon->bad_network_name) | |
744 | return -ENOENT; | |
745 | ||
746 | unc_path = kmalloc(MAX_SHARENAME_LENGTH * 2, GFP_KERNEL); | |
747 | if (unc_path == NULL) | |
748 | return -ENOMEM; | |
749 | ||
750 | unc_path_len = cifs_strtoUTF16(unc_path, tree, strlen(tree), cp) + 1; | |
751 | unc_path_len *= 2; | |
752 | if (unc_path_len < 2) { | |
753 | kfree(unc_path); | |
754 | return -EINVAL; | |
755 | } | |
756 | ||
757 | rc = small_smb2_init(SMB2_TREE_CONNECT, tcon, (void **) &req); | |
758 | if (rc) { | |
759 | kfree(unc_path); | |
760 | return rc; | |
761 | } | |
762 | ||
763 | if (tcon == NULL) { | |
764 | /* since no tcon, smb2_init can not do this, so do here */ | |
765 | req->hdr.SessionId = ses->Suid; | |
766 | /* if (ses->server->sec_mode & SECMODE_SIGN_REQUIRED) | |
767 | req->hdr.Flags |= SMB2_FLAGS_SIGNED; */ | |
768 | } | |
769 | ||
770 | iov[0].iov_base = (char *)req; | |
771 | /* 4 for rfc1002 length field and 1 for pad */ | |
772 | iov[0].iov_len = get_rfc1002_length(req) + 4 - 1; | |
773 | ||
774 | /* Testing shows that buffer offset must be at location of Buffer[0] */ | |
775 | req->PathOffset = cpu_to_le16(sizeof(struct smb2_tree_connect_req) | |
776 | - 1 /* pad */ - 4 /* do not count rfc1001 len field */); | |
777 | req->PathLength = cpu_to_le16(unc_path_len - 2); | |
778 | iov[1].iov_base = unc_path; | |
779 | iov[1].iov_len = unc_path_len; | |
780 | ||
781 | inc_rfc1001_len(req, unc_path_len - 1 /* pad */); | |
782 | ||
783 | rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, 0); | |
784 | rsp = (struct smb2_tree_connect_rsp *)iov[0].iov_base; | |
785 | ||
786 | if (rc != 0) { | |
787 | if (tcon) { | |
788 | cifs_stats_fail_inc(tcon, SMB2_TREE_CONNECT_HE); | |
789 | tcon->need_reconnect = true; | |
790 | } | |
791 | goto tcon_error_exit; | |
792 | } | |
793 | ||
794 | if (rsp == NULL) { | |
795 | rc = -EIO; | |
796 | goto tcon_exit; | |
797 | } | |
798 | ||
799 | if (tcon == NULL) { | |
800 | ses->ipc_tid = rsp->hdr.TreeId; | |
801 | goto tcon_exit; | |
802 | } | |
803 | ||
804 | if (rsp->ShareType & SMB2_SHARE_TYPE_DISK) | |
805 | cFYI(1, "connection to disk share"); | |
806 | else if (rsp->ShareType & SMB2_SHARE_TYPE_PIPE) { | |
807 | tcon->ipc = true; | |
808 | cFYI(1, "connection to pipe share"); | |
809 | } else if (rsp->ShareType & SMB2_SHARE_TYPE_PRINT) { | |
810 | tcon->print = true; | |
811 | cFYI(1, "connection to printer"); | |
812 | } else { | |
813 | cERROR(1, "unknown share type %d", rsp->ShareType); | |
814 | rc = -EOPNOTSUPP; | |
815 | goto tcon_error_exit; | |
816 | } | |
817 | ||
818 | tcon->share_flags = le32_to_cpu(rsp->ShareFlags); | |
819 | tcon->maximal_access = le32_to_cpu(rsp->MaximalAccess); | |
820 | tcon->tidStatus = CifsGood; | |
821 | tcon->need_reconnect = false; | |
822 | tcon->tid = rsp->hdr.TreeId; | |
823 | strncpy(tcon->treeName, tree, MAX_TREE_SIZE); | |
824 | ||
825 | if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) && | |
826 | ((tcon->share_flags & SHI1005_FLAGS_DFS) == 0)) | |
827 | cERROR(1, "DFS capability contradicts DFS flag"); | |
828 | ||
829 | tcon_exit: | |
830 | free_rsp_buf(resp_buftype, rsp); | |
831 | kfree(unc_path); | |
832 | return rc; | |
833 | ||
834 | tcon_error_exit: | |
835 | if (rsp->hdr.Status == STATUS_BAD_NETWORK_NAME) { | |
836 | cERROR(1, "BAD_NETWORK_NAME: %s", tree); | |
837 | tcon->bad_network_name = true; | |
838 | } | |
839 | goto tcon_exit; | |
840 | } | |
841 | ||
842 | int | |
843 | SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon) | |
844 | { | |
845 | struct smb2_tree_disconnect_req *req; /* response is trivial */ | |
846 | int rc = 0; | |
847 | struct TCP_Server_Info *server; | |
848 | struct cifs_ses *ses = tcon->ses; | |
849 | ||
850 | cFYI(1, "Tree Disconnect"); | |
851 | ||
852 | if (ses && (ses->server)) | |
853 | server = ses->server; | |
854 | else | |
855 | return -EIO; | |
856 | ||
857 | if ((tcon->need_reconnect) || (tcon->ses->need_reconnect)) | |
858 | return 0; | |
859 | ||
860 | rc = small_smb2_init(SMB2_TREE_DISCONNECT, tcon, (void **) &req); | |
861 | if (rc) | |
862 | return rc; | |
863 | ||
864 | rc = SendReceiveNoRsp(xid, ses, (char *)&req->hdr, 0); | |
865 | if (rc) | |
866 | cifs_stats_fail_inc(tcon, SMB2_TREE_DISCONNECT_HE); | |
867 | ||
868 | return rc; | |
869 | } | |
2503a0db PS |
870 | |
871 | int | |
872 | SMB2_open(const unsigned int xid, struct cifs_tcon *tcon, __le16 *path, | |
873 | u64 *persistent_fid, u64 *volatile_fid, __u32 desired_access, | |
f0df737e | 874 | __u32 create_disposition, __u32 file_attributes, __u32 create_options, |
2e44b288 | 875 | __u8 *oplock, struct smb2_file_all_info *buf) |
2503a0db PS |
876 | { |
877 | struct smb2_create_req *req; | |
878 | struct smb2_create_rsp *rsp; | |
879 | struct TCP_Server_Info *server; | |
880 | struct cifs_ses *ses = tcon->ses; | |
881 | struct kvec iov[2]; | |
882 | int resp_buftype; | |
883 | int uni_path_len; | |
884 | int rc = 0; | |
885 | int num_iovecs = 2; | |
886 | ||
887 | cFYI(1, "create/open"); | |
888 | ||
889 | if (ses && (ses->server)) | |
890 | server = ses->server; | |
891 | else | |
892 | return -EIO; | |
893 | ||
894 | rc = small_smb2_init(SMB2_CREATE, tcon, (void **) &req); | |
895 | if (rc) | |
896 | return rc; | |
897 | ||
2e44b288 PS |
898 | if (server->oplocks) |
899 | req->RequestedOplockLevel = *oplock; | |
900 | else | |
2503a0db PS |
901 | req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_NONE; |
902 | req->ImpersonationLevel = IL_IMPERSONATION; | |
903 | req->DesiredAccess = cpu_to_le32(desired_access); | |
904 | /* File attributes ignored on open (used in create though) */ | |
905 | req->FileAttributes = cpu_to_le32(file_attributes); | |
906 | req->ShareAccess = FILE_SHARE_ALL_LE; | |
907 | req->CreateDisposition = cpu_to_le32(create_disposition); | |
908 | req->CreateOptions = cpu_to_le32(create_options); | |
909 | uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2; | |
910 | req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req) | |
911 | - 1 /* pad */ - 4 /* do not count rfc1001 len field */); | |
912 | ||
913 | iov[0].iov_base = (char *)req; | |
914 | /* 4 for rfc1002 length field */ | |
915 | iov[0].iov_len = get_rfc1002_length(req) + 4; | |
916 | ||
917 | /* MUST set path len (NameLength) to 0 opening root of share */ | |
918 | if (uni_path_len >= 4) { | |
919 | req->NameLength = cpu_to_le16(uni_path_len - 2); | |
920 | /* -1 since last byte is buf[0] which is sent below (path) */ | |
921 | iov[0].iov_len--; | |
922 | iov[1].iov_len = uni_path_len; | |
923 | iov[1].iov_base = path; | |
924 | /* | |
925 | * -1 since last byte is buf[0] which was counted in | |
926 | * smb2_buf_len. | |
927 | */ | |
928 | inc_rfc1001_len(req, uni_path_len - 1); | |
929 | } else { | |
930 | num_iovecs = 1; | |
931 | req->NameLength = 0; | |
932 | } | |
933 | ||
934 | rc = SendReceive2(xid, ses, iov, num_iovecs, &resp_buftype, 0); | |
935 | rsp = (struct smb2_create_rsp *)iov[0].iov_base; | |
936 | ||
937 | if (rc != 0) { | |
938 | cifs_stats_fail_inc(tcon, SMB2_CREATE_HE); | |
939 | goto creat_exit; | |
940 | } | |
941 | ||
942 | if (rsp == NULL) { | |
943 | rc = -EIO; | |
944 | goto creat_exit; | |
945 | } | |
946 | *persistent_fid = rsp->PersistentFileId; | |
947 | *volatile_fid = rsp->VolatileFileId; | |
f0df737e PS |
948 | |
949 | if (buf) { | |
950 | memcpy(buf, &rsp->CreationTime, 32); | |
951 | buf->AllocationSize = rsp->AllocationSize; | |
952 | buf->EndOfFile = rsp->EndofFile; | |
953 | buf->Attributes = rsp->FileAttributes; | |
954 | buf->NumberOfLinks = cpu_to_le32(1); | |
955 | buf->DeletePending = 0; | |
956 | } | |
2e44b288 PS |
957 | |
958 | *oplock = rsp->OplockLevel; | |
2503a0db PS |
959 | creat_exit: |
960 | free_rsp_buf(resp_buftype, rsp); | |
961 | return rc; | |
962 | } | |
963 | ||
964 | int | |
965 | SMB2_close(const unsigned int xid, struct cifs_tcon *tcon, | |
966 | u64 persistent_fid, u64 volatile_fid) | |
967 | { | |
968 | struct smb2_close_req *req; | |
969 | struct smb2_close_rsp *rsp; | |
970 | struct TCP_Server_Info *server; | |
971 | struct cifs_ses *ses = tcon->ses; | |
972 | struct kvec iov[1]; | |
973 | int resp_buftype; | |
974 | int rc = 0; | |
975 | ||
976 | cFYI(1, "Close"); | |
977 | ||
978 | if (ses && (ses->server)) | |
979 | server = ses->server; | |
980 | else | |
981 | return -EIO; | |
982 | ||
983 | rc = small_smb2_init(SMB2_CLOSE, tcon, (void **) &req); | |
984 | if (rc) | |
985 | return rc; | |
986 | ||
987 | req->PersistentFileId = persistent_fid; | |
988 | req->VolatileFileId = volatile_fid; | |
989 | ||
990 | iov[0].iov_base = (char *)req; | |
991 | /* 4 for rfc1002 length field */ | |
992 | iov[0].iov_len = get_rfc1002_length(req) + 4; | |
993 | ||
994 | rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0); | |
995 | rsp = (struct smb2_close_rsp *)iov[0].iov_base; | |
996 | ||
997 | if (rc != 0) { | |
998 | if (tcon) | |
999 | cifs_stats_fail_inc(tcon, SMB2_CLOSE_HE); | |
1000 | goto close_exit; | |
1001 | } | |
1002 | ||
1003 | if (rsp == NULL) { | |
1004 | rc = -EIO; | |
1005 | goto close_exit; | |
1006 | } | |
1007 | ||
1008 | /* BB FIXME - decode close response, update inode for caching */ | |
1009 | ||
1010 | close_exit: | |
1011 | free_rsp_buf(resp_buftype, rsp); | |
1012 | return rc; | |
1013 | } | |
be4cb9e3 PS |
1014 | |
1015 | static int | |
1016 | validate_buf(unsigned int offset, unsigned int buffer_length, | |
1017 | struct smb2_hdr *hdr, unsigned int min_buf_size) | |
1018 | ||
1019 | { | |
1020 | unsigned int smb_len = be32_to_cpu(hdr->smb2_buf_length); | |
1021 | char *end_of_smb = smb_len + 4 /* RFC1001 length field */ + (char *)hdr; | |
1022 | char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr; | |
1023 | char *end_of_buf = begin_of_buf + buffer_length; | |
1024 | ||
1025 | ||
1026 | if (buffer_length < min_buf_size) { | |
1027 | cERROR(1, "buffer length %d smaller than minimum size %d", | |
1028 | buffer_length, min_buf_size); | |
1029 | return -EINVAL; | |
1030 | } | |
1031 | ||
1032 | /* check if beyond RFC1001 maximum length */ | |
1033 | if ((smb_len > 0x7FFFFF) || (buffer_length > 0x7FFFFF)) { | |
1034 | cERROR(1, "buffer length %d or smb length %d too large", | |
1035 | buffer_length, smb_len); | |
1036 | return -EINVAL; | |
1037 | } | |
1038 | ||
1039 | if ((begin_of_buf > end_of_smb) || (end_of_buf > end_of_smb)) { | |
1040 | cERROR(1, "illegal server response, bad offset to data"); | |
1041 | return -EINVAL; | |
1042 | } | |
1043 | ||
1044 | return 0; | |
1045 | } | |
1046 | ||
1047 | /* | |
1048 | * If SMB buffer fields are valid, copy into temporary buffer to hold result. | |
1049 | * Caller must free buffer. | |
1050 | */ | |
1051 | static int | |
1052 | validate_and_copy_buf(unsigned int offset, unsigned int buffer_length, | |
1053 | struct smb2_hdr *hdr, unsigned int minbufsize, | |
1054 | char *data) | |
1055 | ||
1056 | { | |
1057 | char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr; | |
1058 | int rc; | |
1059 | ||
1060 | if (!data) | |
1061 | return -EINVAL; | |
1062 | ||
1063 | rc = validate_buf(offset, buffer_length, hdr, minbufsize); | |
1064 | if (rc) | |
1065 | return rc; | |
1066 | ||
1067 | memcpy(data, begin_of_buf, buffer_length); | |
1068 | ||
1069 | return 0; | |
1070 | } | |
1071 | ||
f0df737e PS |
1072 | static int |
1073 | query_info(const unsigned int xid, struct cifs_tcon *tcon, | |
1074 | u64 persistent_fid, u64 volatile_fid, u8 info_class, | |
1075 | size_t output_len, size_t min_len, void *data) | |
be4cb9e3 PS |
1076 | { |
1077 | struct smb2_query_info_req *req; | |
1078 | struct smb2_query_info_rsp *rsp = NULL; | |
1079 | struct kvec iov[2]; | |
1080 | int rc = 0; | |
1081 | int resp_buftype; | |
1082 | struct TCP_Server_Info *server; | |
1083 | struct cifs_ses *ses = tcon->ses; | |
1084 | ||
1085 | cFYI(1, "Query Info"); | |
1086 | ||
1087 | if (ses && (ses->server)) | |
1088 | server = ses->server; | |
1089 | else | |
1090 | return -EIO; | |
1091 | ||
1092 | rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req); | |
1093 | if (rc) | |
1094 | return rc; | |
1095 | ||
1096 | req->InfoType = SMB2_O_INFO_FILE; | |
f0df737e | 1097 | req->FileInfoClass = info_class; |
be4cb9e3 PS |
1098 | req->PersistentFileId = persistent_fid; |
1099 | req->VolatileFileId = volatile_fid; | |
1100 | /* 4 for rfc1002 length field and 1 for Buffer */ | |
1101 | req->InputBufferOffset = | |
1102 | cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4); | |
f0df737e | 1103 | req->OutputBufferLength = cpu_to_le32(output_len); |
be4cb9e3 PS |
1104 | |
1105 | iov[0].iov_base = (char *)req; | |
1106 | /* 4 for rfc1002 length field */ | |
1107 | iov[0].iov_len = get_rfc1002_length(req) + 4; | |
1108 | ||
1109 | rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0); | |
1110 | if (rc) { | |
1111 | cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE); | |
1112 | goto qinf_exit; | |
1113 | } | |
1114 | ||
1115 | rsp = (struct smb2_query_info_rsp *)iov[0].iov_base; | |
1116 | ||
1117 | rc = validate_and_copy_buf(le16_to_cpu(rsp->OutputBufferOffset), | |
1118 | le32_to_cpu(rsp->OutputBufferLength), | |
f0df737e | 1119 | &rsp->hdr, min_len, data); |
be4cb9e3 PS |
1120 | |
1121 | qinf_exit: | |
1122 | free_rsp_buf(resp_buftype, rsp); | |
1123 | return rc; | |
1124 | } | |
9094fad1 | 1125 | |
f0df737e PS |
1126 | int |
1127 | SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon, | |
1128 | u64 persistent_fid, u64 volatile_fid, | |
1129 | struct smb2_file_all_info *data) | |
1130 | { | |
1131 | return query_info(xid, tcon, persistent_fid, volatile_fid, | |
1132 | FILE_ALL_INFORMATION, | |
1133 | sizeof(struct smb2_file_all_info) + MAX_NAME * 2, | |
1134 | sizeof(struct smb2_file_all_info), data); | |
1135 | } | |
1136 | ||
1137 | int | |
1138 | SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon, | |
1139 | u64 persistent_fid, u64 volatile_fid, __le64 *uniqueid) | |
1140 | { | |
1141 | return query_info(xid, tcon, persistent_fid, volatile_fid, | |
1142 | FILE_INTERNAL_INFORMATION, | |
1143 | sizeof(struct smb2_file_internal_info), | |
1144 | sizeof(struct smb2_file_internal_info), uniqueid); | |
1145 | } | |
1146 | ||
9094fad1 PS |
1147 | /* |
1148 | * This is a no-op for now. We're not really interested in the reply, but | |
1149 | * rather in the fact that the server sent one and that server->lstrp | |
1150 | * gets updated. | |
1151 | * | |
1152 | * FIXME: maybe we should consider checking that the reply matches request? | |
1153 | */ | |
1154 | static void | |
1155 | smb2_echo_callback(struct mid_q_entry *mid) | |
1156 | { | |
1157 | struct TCP_Server_Info *server = mid->callback_data; | |
1158 | struct smb2_echo_rsp *smb2 = (struct smb2_echo_rsp *)mid->resp_buf; | |
1159 | unsigned int credits_received = 1; | |
1160 | ||
1161 | if (mid->mid_state == MID_RESPONSE_RECEIVED) | |
1162 | credits_received = le16_to_cpu(smb2->hdr.CreditRequest); | |
1163 | ||
1164 | DeleteMidQEntry(mid); | |
1165 | add_credits(server, credits_received, CIFS_ECHO_OP); | |
1166 | } | |
1167 | ||
1168 | int | |
1169 | SMB2_echo(struct TCP_Server_Info *server) | |
1170 | { | |
1171 | struct smb2_echo_req *req; | |
1172 | int rc = 0; | |
1173 | struct kvec iov; | |
fec344e3 JL |
1174 | struct smb_rqst rqst = { .rq_iov = &iov, |
1175 | .rq_nvec = 1 }; | |
9094fad1 PS |
1176 | |
1177 | cFYI(1, "In echo request"); | |
1178 | ||
1179 | rc = small_smb2_init(SMB2_ECHO, NULL, (void **)&req); | |
1180 | if (rc) | |
1181 | return rc; | |
1182 | ||
1183 | req->hdr.CreditRequest = cpu_to_le16(1); | |
1184 | ||
1185 | iov.iov_base = (char *)req; | |
1186 | /* 4 for rfc1002 length field */ | |
1187 | iov.iov_len = get_rfc1002_length(req) + 4; | |
1188 | ||
fec344e3 | 1189 | rc = cifs_call_async(server, &rqst, NULL, smb2_echo_callback, server, |
9094fad1 PS |
1190 | CIFS_ECHO_OP); |
1191 | if (rc) | |
1192 | cFYI(1, "Echo request failed: %d", rc); | |
1193 | ||
1194 | cifs_small_buf_release(req); | |
1195 | return rc; | |
1196 | } | |
7a5cfb19 PS |
1197 | |
1198 | int | |
1199 | SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, | |
1200 | u64 volatile_fid) | |
1201 | { | |
1202 | struct smb2_flush_req *req; | |
1203 | struct TCP_Server_Info *server; | |
1204 | struct cifs_ses *ses = tcon->ses; | |
1205 | struct kvec iov[1]; | |
1206 | int resp_buftype; | |
1207 | int rc = 0; | |
1208 | ||
1209 | cFYI(1, "Flush"); | |
1210 | ||
1211 | if (ses && (ses->server)) | |
1212 | server = ses->server; | |
1213 | else | |
1214 | return -EIO; | |
1215 | ||
1216 | rc = small_smb2_init(SMB2_FLUSH, tcon, (void **) &req); | |
1217 | if (rc) | |
1218 | return rc; | |
1219 | ||
1220 | req->PersistentFileId = persistent_fid; | |
1221 | req->VolatileFileId = volatile_fid; | |
1222 | ||
1223 | iov[0].iov_base = (char *)req; | |
1224 | /* 4 for rfc1002 length field */ | |
1225 | iov[0].iov_len = get_rfc1002_length(req) + 4; | |
1226 | ||
1227 | rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0); | |
1228 | ||
1229 | if ((rc != 0) && tcon) | |
1230 | cifs_stats_fail_inc(tcon, SMB2_FLUSH_HE); | |
1231 | ||
1232 | free_rsp_buf(resp_buftype, iov[0].iov_base); | |
1233 | return rc; | |
1234 | } | |
09a4707e PS |
1235 | |
1236 | /* | |
1237 | * To form a chain of read requests, any read requests after the first should | |
1238 | * have the end_of_chain boolean set to true. | |
1239 | */ | |
1240 | static int | |
1241 | smb2_new_read_req(struct kvec *iov, struct cifs_io_parms *io_parms, | |
1242 | unsigned int remaining_bytes, int request_type) | |
1243 | { | |
1244 | int rc = -EACCES; | |
1245 | struct smb2_read_req *req = NULL; | |
1246 | ||
1247 | rc = small_smb2_init(SMB2_READ, io_parms->tcon, (void **) &req); | |
1248 | if (rc) | |
1249 | return rc; | |
1250 | if (io_parms->tcon->ses->server == NULL) | |
1251 | return -ECONNABORTED; | |
1252 | ||
1253 | req->hdr.ProcessId = cpu_to_le32(io_parms->pid); | |
1254 | ||
1255 | req->PersistentFileId = io_parms->persistent_fid; | |
1256 | req->VolatileFileId = io_parms->volatile_fid; | |
1257 | req->ReadChannelInfoOffset = 0; /* reserved */ | |
1258 | req->ReadChannelInfoLength = 0; /* reserved */ | |
1259 | req->Channel = 0; /* reserved */ | |
1260 | req->MinimumCount = 0; | |
1261 | req->Length = cpu_to_le32(io_parms->length); | |
1262 | req->Offset = cpu_to_le64(io_parms->offset); | |
1263 | ||
1264 | if (request_type & CHAINED_REQUEST) { | |
1265 | if (!(request_type & END_OF_CHAIN)) { | |
1266 | /* 4 for rfc1002 length field */ | |
1267 | req->hdr.NextCommand = | |
1268 | cpu_to_le32(get_rfc1002_length(req) + 4); | |
1269 | } else /* END_OF_CHAIN */ | |
1270 | req->hdr.NextCommand = 0; | |
1271 | if (request_type & RELATED_REQUEST) { | |
1272 | req->hdr.Flags |= SMB2_FLAGS_RELATED_OPERATIONS; | |
1273 | /* | |
1274 | * Related requests use info from previous read request | |
1275 | * in chain. | |
1276 | */ | |
1277 | req->hdr.SessionId = 0xFFFFFFFF; | |
1278 | req->hdr.TreeId = 0xFFFFFFFF; | |
1279 | req->PersistentFileId = 0xFFFFFFFF; | |
1280 | req->VolatileFileId = 0xFFFFFFFF; | |
1281 | } | |
1282 | } | |
1283 | if (remaining_bytes > io_parms->length) | |
1284 | req->RemainingBytes = cpu_to_le32(remaining_bytes); | |
1285 | else | |
1286 | req->RemainingBytes = 0; | |
1287 | ||
1288 | iov[0].iov_base = (char *)req; | |
1289 | /* 4 for rfc1002 length field */ | |
1290 | iov[0].iov_len = get_rfc1002_length(req) + 4; | |
1291 | return rc; | |
1292 | } | |
1293 | ||
1294 | static void | |
1295 | smb2_readv_callback(struct mid_q_entry *mid) | |
1296 | { | |
1297 | struct cifs_readdata *rdata = mid->callback_data; | |
1298 | struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink); | |
1299 | struct TCP_Server_Info *server = tcon->ses->server; | |
1300 | struct smb2_hdr *buf = (struct smb2_hdr *)rdata->iov[0].iov_base; | |
1301 | unsigned int credits_received = 1; | |
0b688cfc JL |
1302 | struct smb_rqst rqst = { .rq_iov = rdata->iov, |
1303 | .rq_nvec = rdata->nr_iov }; | |
09a4707e PS |
1304 | |
1305 | cFYI(1, "%s: mid=%llu state=%d result=%d bytes=%u", __func__, | |
1306 | mid->mid, mid->mid_state, rdata->result, rdata->bytes); | |
1307 | ||
1308 | switch (mid->mid_state) { | |
1309 | case MID_RESPONSE_RECEIVED: | |
1310 | credits_received = le16_to_cpu(buf->CreditRequest); | |
1311 | /* result already set, check signature */ | |
3c1bf7e4 PS |
1312 | if (server->sec_mode & |
1313 | (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) { | |
1314 | int rc; | |
1315 | ||
0b688cfc | 1316 | rc = smb2_verify_signature(&rqst, server); |
3c1bf7e4 PS |
1317 | if (rc) |
1318 | cERROR(1, "SMB signature verification returned " | |
1319 | "error = %d", rc); | |
1320 | } | |
09a4707e PS |
1321 | /* FIXME: should this be counted toward the initiating task? */ |
1322 | task_io_account_read(rdata->bytes); | |
1323 | cifs_stats_bytes_read(tcon, rdata->bytes); | |
1324 | break; | |
1325 | case MID_REQUEST_SUBMITTED: | |
1326 | case MID_RETRY_NEEDED: | |
1327 | rdata->result = -EAGAIN; | |
1328 | break; | |
1329 | default: | |
1330 | if (rdata->result != -ENODATA) | |
1331 | rdata->result = -EIO; | |
1332 | } | |
1333 | ||
1334 | if (rdata->result) | |
1335 | cifs_stats_fail_inc(tcon, SMB2_READ_HE); | |
1336 | ||
1337 | queue_work(cifsiod_wq, &rdata->work); | |
1338 | DeleteMidQEntry(mid); | |
1339 | add_credits(server, credits_received, 0); | |
1340 | } | |
1341 | ||
1342 | /* smb2_async_readv - send an async write, and set up mid to handle result */ | |
1343 | int | |
1344 | smb2_async_readv(struct cifs_readdata *rdata) | |
1345 | { | |
1346 | int rc; | |
1347 | struct smb2_hdr *buf; | |
1348 | struct cifs_io_parms io_parms; | |
fec344e3 JL |
1349 | struct smb_rqst rqst = { .rq_iov = rdata->iov, |
1350 | .rq_nvec = 1 }; | |
09a4707e PS |
1351 | |
1352 | cFYI(1, "%s: offset=%llu bytes=%u", __func__, | |
1353 | rdata->offset, rdata->bytes); | |
1354 | ||
1355 | io_parms.tcon = tlink_tcon(rdata->cfile->tlink); | |
1356 | io_parms.offset = rdata->offset; | |
1357 | io_parms.length = rdata->bytes; | |
1358 | io_parms.persistent_fid = rdata->cfile->fid.persistent_fid; | |
1359 | io_parms.volatile_fid = rdata->cfile->fid.volatile_fid; | |
1360 | io_parms.pid = rdata->pid; | |
1361 | rc = smb2_new_read_req(&rdata->iov[0], &io_parms, 0, 0); | |
1362 | if (rc) | |
1363 | return rc; | |
1364 | ||
1365 | buf = (struct smb2_hdr *)rdata->iov[0].iov_base; | |
1366 | /* 4 for rfc1002 length field */ | |
1367 | rdata->iov[0].iov_len = get_rfc1002_length(rdata->iov[0].iov_base) + 4; | |
1368 | ||
1369 | kref_get(&rdata->refcount); | |
fec344e3 | 1370 | rc = cifs_call_async(io_parms.tcon->ses->server, &rqst, |
09a4707e PS |
1371 | cifs_readv_receive, smb2_readv_callback, |
1372 | rdata, 0); | |
1373 | if (rc) | |
1374 | kref_put(&rdata->refcount, cifs_readdata_release); | |
1375 | ||
1376 | cifs_small_buf_release(buf); | |
1377 | return rc; | |
1378 | } | |
33319141 | 1379 | |
d8e05039 PS |
1380 | int |
1381 | SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms, | |
1382 | unsigned int *nbytes, char **buf, int *buf_type) | |
1383 | { | |
1384 | int resp_buftype, rc = -EACCES; | |
1385 | struct smb2_read_rsp *rsp = NULL; | |
1386 | struct kvec iov[1]; | |
1387 | ||
1388 | *nbytes = 0; | |
1389 | rc = smb2_new_read_req(iov, io_parms, 0, 0); | |
1390 | if (rc) | |
1391 | return rc; | |
1392 | ||
1393 | rc = SendReceive2(xid, io_parms->tcon->ses, iov, 1, | |
1394 | &resp_buftype, CIFS_LOG_ERROR); | |
1395 | ||
1396 | rsp = (struct smb2_read_rsp *)iov[0].iov_base; | |
1397 | ||
1398 | if (rsp->hdr.Status == STATUS_END_OF_FILE) { | |
1399 | free_rsp_buf(resp_buftype, iov[0].iov_base); | |
1400 | return 0; | |
1401 | } | |
1402 | ||
1403 | if (rc) { | |
1404 | cifs_stats_fail_inc(io_parms->tcon, SMB2_READ_HE); | |
1405 | cERROR(1, "Send error in read = %d", rc); | |
1406 | } else { | |
1407 | *nbytes = le32_to_cpu(rsp->DataLength); | |
1408 | if ((*nbytes > CIFS_MAX_MSGSIZE) || | |
1409 | (*nbytes > io_parms->length)) { | |
1410 | cFYI(1, "bad length %d for count %d", *nbytes, | |
1411 | io_parms->length); | |
1412 | rc = -EIO; | |
1413 | *nbytes = 0; | |
1414 | } | |
1415 | } | |
1416 | ||
1417 | if (*buf) { | |
1418 | memcpy(*buf, (char *)rsp->hdr.ProtocolId + rsp->DataOffset, | |
1419 | *nbytes); | |
1420 | free_rsp_buf(resp_buftype, iov[0].iov_base); | |
1421 | } else if (resp_buftype != CIFS_NO_BUFFER) { | |
1422 | *buf = iov[0].iov_base; | |
1423 | if (resp_buftype == CIFS_SMALL_BUFFER) | |
1424 | *buf_type = CIFS_SMALL_BUFFER; | |
1425 | else if (resp_buftype == CIFS_LARGE_BUFFER) | |
1426 | *buf_type = CIFS_LARGE_BUFFER; | |
1427 | } | |
1428 | return rc; | |
1429 | } | |
1430 | ||
33319141 PS |
1431 | /* |
1432 | * Check the mid_state and signature on received buffer (if any), and queue the | |
1433 | * workqueue completion task. | |
1434 | */ | |
1435 | static void | |
1436 | smb2_writev_callback(struct mid_q_entry *mid) | |
1437 | { | |
1438 | struct cifs_writedata *wdata = mid->callback_data; | |
1439 | struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink); | |
1440 | unsigned int written; | |
1441 | struct smb2_write_rsp *rsp = (struct smb2_write_rsp *)mid->resp_buf; | |
1442 | unsigned int credits_received = 1; | |
1443 | ||
1444 | switch (mid->mid_state) { | |
1445 | case MID_RESPONSE_RECEIVED: | |
1446 | credits_received = le16_to_cpu(rsp->hdr.CreditRequest); | |
1447 | wdata->result = smb2_check_receive(mid, tcon->ses->server, 0); | |
1448 | if (wdata->result != 0) | |
1449 | break; | |
1450 | ||
1451 | written = le32_to_cpu(rsp->DataLength); | |
1452 | /* | |
1453 | * Mask off high 16 bits when bytes written as returned | |
1454 | * by the server is greater than bytes requested by the | |
1455 | * client. OS/2 servers are known to set incorrect | |
1456 | * CountHigh values. | |
1457 | */ | |
1458 | if (written > wdata->bytes) | |
1459 | written &= 0xFFFF; | |
1460 | ||
1461 | if (written < wdata->bytes) | |
1462 | wdata->result = -ENOSPC; | |
1463 | else | |
1464 | wdata->bytes = written; | |
1465 | break; | |
1466 | case MID_REQUEST_SUBMITTED: | |
1467 | case MID_RETRY_NEEDED: | |
1468 | wdata->result = -EAGAIN; | |
1469 | break; | |
1470 | default: | |
1471 | wdata->result = -EIO; | |
1472 | break; | |
1473 | } | |
1474 | ||
1475 | if (wdata->result) | |
1476 | cifs_stats_fail_inc(tcon, SMB2_WRITE_HE); | |
1477 | ||
1478 | queue_work(cifsiod_wq, &wdata->work); | |
1479 | DeleteMidQEntry(mid); | |
1480 | add_credits(tcon->ses->server, credits_received, 0); | |
1481 | } | |
1482 | ||
1483 | /* smb2_async_writev - send an async write, and set up mid to handle result */ | |
1484 | int | |
1485 | smb2_async_writev(struct cifs_writedata *wdata) | |
1486 | { | |
eddb079d | 1487 | int rc = -EACCES; |
33319141 PS |
1488 | struct smb2_write_req *req = NULL; |
1489 | struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink); | |
eddb079d | 1490 | struct kvec iov; |
fec344e3 | 1491 | struct smb_rqst rqst; |
33319141 PS |
1492 | |
1493 | rc = small_smb2_init(SMB2_WRITE, tcon, (void **) &req); | |
1494 | if (rc) | |
1495 | goto async_writev_out; | |
1496 | ||
33319141 PS |
1497 | req->hdr.ProcessId = cpu_to_le32(wdata->cfile->pid); |
1498 | ||
1499 | req->PersistentFileId = wdata->cfile->fid.persistent_fid; | |
1500 | req->VolatileFileId = wdata->cfile->fid.volatile_fid; | |
1501 | req->WriteChannelInfoOffset = 0; | |
1502 | req->WriteChannelInfoLength = 0; | |
1503 | req->Channel = 0; | |
1504 | req->Offset = cpu_to_le64(wdata->offset); | |
1505 | /* 4 for rfc1002 length field */ | |
1506 | req->DataOffset = cpu_to_le16( | |
1507 | offsetof(struct smb2_write_req, Buffer) - 4); | |
1508 | req->RemainingBytes = 0; | |
1509 | ||
1510 | /* 4 for rfc1002 length field and 1 for Buffer */ | |
eddb079d JL |
1511 | iov.iov_len = get_rfc1002_length(req) + 4 - 1; |
1512 | iov.iov_base = req; | |
33319141 | 1513 | |
eddb079d JL |
1514 | rqst.rq_iov = &iov; |
1515 | rqst.rq_nvec = 1; | |
1516 | rqst.rq_pages = wdata->pages; | |
1517 | rqst.rq_npages = wdata->nr_pages; | |
1518 | rqst.rq_pagesz = wdata->pagesz; | |
1519 | rqst.rq_tailsz = wdata->tailsz; | |
33319141 PS |
1520 | |
1521 | cFYI(1, "async write at %llu %u bytes", wdata->offset, wdata->bytes); | |
1522 | ||
1523 | req->Length = cpu_to_le32(wdata->bytes); | |
1524 | ||
1525 | inc_rfc1001_len(&req->hdr, wdata->bytes - 1 /* Buffer */); | |
1526 | ||
1527 | kref_get(&wdata->refcount); | |
fec344e3 JL |
1528 | rc = cifs_call_async(tcon->ses->server, &rqst, NULL, |
1529 | smb2_writev_callback, wdata, 0); | |
33319141 PS |
1530 | |
1531 | if (rc) | |
1532 | kref_put(&wdata->refcount, cifs_writedata_release); | |
1533 | ||
33319141 PS |
1534 | async_writev_out: |
1535 | cifs_small_buf_release(req); | |
33319141 PS |
1536 | return rc; |
1537 | } | |
009d3443 PS |
1538 | |
1539 | /* | |
1540 | * SMB2_write function gets iov pointer to kvec array with n_vec as a length. | |
1541 | * The length field from io_parms must be at least 1 and indicates a number of | |
1542 | * elements with data to write that begins with position 1 in iov array. All | |
1543 | * data length is specified by count. | |
1544 | */ | |
1545 | int | |
1546 | SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms, | |
1547 | unsigned int *nbytes, struct kvec *iov, int n_vec) | |
1548 | { | |
1549 | int rc = 0; | |
1550 | struct smb2_write_req *req = NULL; | |
1551 | struct smb2_write_rsp *rsp = NULL; | |
1552 | int resp_buftype; | |
1553 | *nbytes = 0; | |
1554 | ||
1555 | if (n_vec < 1) | |
1556 | return rc; | |
1557 | ||
1558 | rc = small_smb2_init(SMB2_WRITE, io_parms->tcon, (void **) &req); | |
1559 | if (rc) | |
1560 | return rc; | |
1561 | ||
1562 | if (io_parms->tcon->ses->server == NULL) | |
1563 | return -ECONNABORTED; | |
1564 | ||
1565 | req->hdr.ProcessId = cpu_to_le32(io_parms->pid); | |
1566 | ||
1567 | req->PersistentFileId = io_parms->persistent_fid; | |
1568 | req->VolatileFileId = io_parms->volatile_fid; | |
1569 | req->WriteChannelInfoOffset = 0; | |
1570 | req->WriteChannelInfoLength = 0; | |
1571 | req->Channel = 0; | |
1572 | req->Length = cpu_to_le32(io_parms->length); | |
1573 | req->Offset = cpu_to_le64(io_parms->offset); | |
1574 | /* 4 for rfc1002 length field */ | |
1575 | req->DataOffset = cpu_to_le16( | |
1576 | offsetof(struct smb2_write_req, Buffer) - 4); | |
1577 | req->RemainingBytes = 0; | |
1578 | ||
1579 | iov[0].iov_base = (char *)req; | |
1580 | /* 4 for rfc1002 length field and 1 for Buffer */ | |
1581 | iov[0].iov_len = get_rfc1002_length(req) + 4 - 1; | |
1582 | ||
1583 | /* length of entire message including data to be written */ | |
1584 | inc_rfc1001_len(req, io_parms->length - 1 /* Buffer */); | |
1585 | ||
1586 | rc = SendReceive2(xid, io_parms->tcon->ses, iov, n_vec + 1, | |
1587 | &resp_buftype, 0); | |
1588 | ||
1589 | if (rc) { | |
1590 | cifs_stats_fail_inc(io_parms->tcon, SMB2_WRITE_HE); | |
1591 | cERROR(1, "Send error in write = %d", rc); | |
1592 | } else { | |
1593 | rsp = (struct smb2_write_rsp *)iov[0].iov_base; | |
1594 | *nbytes = le32_to_cpu(rsp->DataLength); | |
1595 | free_rsp_buf(resp_buftype, rsp); | |
1596 | } | |
1597 | return rc; | |
1598 | } | |
35143eb5 | 1599 | |
d324f08d PS |
1600 | static unsigned int |
1601 | num_entries(char *bufstart, char *end_of_buf, char **lastentry, size_t size) | |
1602 | { | |
1603 | int len; | |
1604 | unsigned int entrycount = 0; | |
1605 | unsigned int next_offset = 0; | |
1606 | FILE_DIRECTORY_INFO *entryptr; | |
1607 | ||
1608 | if (bufstart == NULL) | |
1609 | return 0; | |
1610 | ||
1611 | entryptr = (FILE_DIRECTORY_INFO *)bufstart; | |
1612 | ||
1613 | while (1) { | |
1614 | entryptr = (FILE_DIRECTORY_INFO *) | |
1615 | ((char *)entryptr + next_offset); | |
1616 | ||
1617 | if ((char *)entryptr + size > end_of_buf) { | |
1618 | cERROR(1, "malformed search entry would overflow"); | |
1619 | break; | |
1620 | } | |
1621 | ||
1622 | len = le32_to_cpu(entryptr->FileNameLength); | |
1623 | if ((char *)entryptr + len + size > end_of_buf) { | |
1624 | cERROR(1, "directory entry name would overflow frame " | |
1625 | "end of buf %p", end_of_buf); | |
1626 | break; | |
1627 | } | |
1628 | ||
1629 | *lastentry = (char *)entryptr; | |
1630 | entrycount++; | |
1631 | ||
1632 | next_offset = le32_to_cpu(entryptr->NextEntryOffset); | |
1633 | if (!next_offset) | |
1634 | break; | |
1635 | } | |
1636 | ||
1637 | return entrycount; | |
1638 | } | |
1639 | ||
1640 | /* | |
1641 | * Readdir/FindFirst | |
1642 | */ | |
1643 | int | |
1644 | SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon, | |
1645 | u64 persistent_fid, u64 volatile_fid, int index, | |
1646 | struct cifs_search_info *srch_inf) | |
1647 | { | |
1648 | struct smb2_query_directory_req *req; | |
1649 | struct smb2_query_directory_rsp *rsp = NULL; | |
1650 | struct kvec iov[2]; | |
1651 | int rc = 0; | |
1652 | int len; | |
1653 | int resp_buftype; | |
1654 | unsigned char *bufptr; | |
1655 | struct TCP_Server_Info *server; | |
1656 | struct cifs_ses *ses = tcon->ses; | |
1657 | __le16 asteriks = cpu_to_le16('*'); | |
1658 | char *end_of_smb; | |
1659 | unsigned int output_size = CIFSMaxBufSize; | |
1660 | size_t info_buf_size; | |
1661 | ||
1662 | if (ses && (ses->server)) | |
1663 | server = ses->server; | |
1664 | else | |
1665 | return -EIO; | |
1666 | ||
1667 | rc = small_smb2_init(SMB2_QUERY_DIRECTORY, tcon, (void **) &req); | |
1668 | if (rc) | |
1669 | return rc; | |
1670 | ||
1671 | switch (srch_inf->info_level) { | |
1672 | case SMB_FIND_FILE_DIRECTORY_INFO: | |
1673 | req->FileInformationClass = FILE_DIRECTORY_INFORMATION; | |
1674 | info_buf_size = sizeof(FILE_DIRECTORY_INFO) - 1; | |
1675 | break; | |
1676 | case SMB_FIND_FILE_ID_FULL_DIR_INFO: | |
1677 | req->FileInformationClass = FILEID_FULL_DIRECTORY_INFORMATION; | |
1678 | info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO) - 1; | |
1679 | break; | |
1680 | default: | |
1681 | cERROR(1, "info level %u isn't supported", | |
1682 | srch_inf->info_level); | |
1683 | rc = -EINVAL; | |
1684 | goto qdir_exit; | |
1685 | } | |
1686 | ||
1687 | req->FileIndex = cpu_to_le32(index); | |
1688 | req->PersistentFileId = persistent_fid; | |
1689 | req->VolatileFileId = volatile_fid; | |
1690 | ||
1691 | len = 0x2; | |
1692 | bufptr = req->Buffer; | |
1693 | memcpy(bufptr, &asteriks, len); | |
1694 | ||
1695 | req->FileNameOffset = | |
1696 | cpu_to_le16(sizeof(struct smb2_query_directory_req) - 1 - 4); | |
1697 | req->FileNameLength = cpu_to_le16(len); | |
1698 | /* | |
1699 | * BB could be 30 bytes or so longer if we used SMB2 specific | |
1700 | * buffer lengths, but this is safe and close enough. | |
1701 | */ | |
1702 | output_size = min_t(unsigned int, output_size, server->maxBuf); | |
1703 | output_size = min_t(unsigned int, output_size, 2 << 15); | |
1704 | req->OutputBufferLength = cpu_to_le32(output_size); | |
1705 | ||
1706 | iov[0].iov_base = (char *)req; | |
1707 | /* 4 for RFC1001 length and 1 for Buffer */ | |
1708 | iov[0].iov_len = get_rfc1002_length(req) + 4 - 1; | |
1709 | ||
1710 | iov[1].iov_base = (char *)(req->Buffer); | |
1711 | iov[1].iov_len = len; | |
1712 | ||
1713 | inc_rfc1001_len(req, len - 1 /* Buffer */); | |
1714 | ||
1715 | rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, 0); | |
1716 | if (rc) { | |
1717 | cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE); | |
1718 | goto qdir_exit; | |
1719 | } | |
1720 | rsp = (struct smb2_query_directory_rsp *)iov[0].iov_base; | |
1721 | ||
1722 | rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset), | |
1723 | le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr, | |
1724 | info_buf_size); | |
1725 | if (rc) | |
1726 | goto qdir_exit; | |
1727 | ||
1728 | srch_inf->unicode = true; | |
1729 | ||
1730 | if (srch_inf->ntwrk_buf_start) { | |
1731 | if (srch_inf->smallBuf) | |
1732 | cifs_small_buf_release(srch_inf->ntwrk_buf_start); | |
1733 | else | |
1734 | cifs_buf_release(srch_inf->ntwrk_buf_start); | |
1735 | } | |
1736 | srch_inf->ntwrk_buf_start = (char *)rsp; | |
1737 | srch_inf->srch_entries_start = srch_inf->last_entry = 4 /* rfclen */ + | |
1738 | (char *)&rsp->hdr + le16_to_cpu(rsp->OutputBufferOffset); | |
1739 | /* 4 for rfc1002 length field */ | |
1740 | end_of_smb = get_rfc1002_length(rsp) + 4 + (char *)&rsp->hdr; | |
1741 | srch_inf->entries_in_buffer = | |
1742 | num_entries(srch_inf->srch_entries_start, end_of_smb, | |
1743 | &srch_inf->last_entry, info_buf_size); | |
1744 | srch_inf->index_of_last_entry += srch_inf->entries_in_buffer; | |
1745 | cFYI(1, "num entries %d last_index %lld srch start %p srch end %p", | |
1746 | srch_inf->entries_in_buffer, srch_inf->index_of_last_entry, | |
1747 | srch_inf->srch_entries_start, srch_inf->last_entry); | |
1748 | if (resp_buftype == CIFS_LARGE_BUFFER) | |
1749 | srch_inf->smallBuf = false; | |
1750 | else if (resp_buftype == CIFS_SMALL_BUFFER) | |
1751 | srch_inf->smallBuf = true; | |
1752 | else | |
1753 | cERROR(1, "illegal search buffer type"); | |
1754 | ||
1755 | if (rsp->hdr.Status == STATUS_NO_MORE_FILES) | |
1756 | srch_inf->endOfSearch = 1; | |
1757 | else | |
1758 | srch_inf->endOfSearch = 0; | |
1759 | ||
1760 | return rc; | |
1761 | ||
1762 | qdir_exit: | |
1763 | free_rsp_buf(resp_buftype, rsp); | |
1764 | return rc; | |
1765 | } | |
1766 | ||
35143eb5 PS |
1767 | static int |
1768 | send_set_info(const unsigned int xid, struct cifs_tcon *tcon, | |
c839ff24 | 1769 | u64 persistent_fid, u64 volatile_fid, u32 pid, int info_class, |
35143eb5 PS |
1770 | unsigned int num, void **data, unsigned int *size) |
1771 | { | |
1772 | struct smb2_set_info_req *req; | |
1773 | struct smb2_set_info_rsp *rsp = NULL; | |
1774 | struct kvec *iov; | |
1775 | int rc = 0; | |
1776 | int resp_buftype; | |
1777 | unsigned int i; | |
1778 | struct TCP_Server_Info *server; | |
1779 | struct cifs_ses *ses = tcon->ses; | |
1780 | ||
1781 | if (ses && (ses->server)) | |
1782 | server = ses->server; | |
1783 | else | |
1784 | return -EIO; | |
1785 | ||
1786 | if (!num) | |
1787 | return -EINVAL; | |
1788 | ||
1789 | iov = kmalloc(sizeof(struct kvec) * num, GFP_KERNEL); | |
1790 | if (!iov) | |
1791 | return -ENOMEM; | |
1792 | ||
1793 | rc = small_smb2_init(SMB2_SET_INFO, tcon, (void **) &req); | |
1794 | if (rc) { | |
1795 | kfree(iov); | |
1796 | return rc; | |
1797 | } | |
1798 | ||
c839ff24 PS |
1799 | req->hdr.ProcessId = cpu_to_le32(pid); |
1800 | ||
35143eb5 PS |
1801 | req->InfoType = SMB2_O_INFO_FILE; |
1802 | req->FileInfoClass = info_class; | |
1803 | req->PersistentFileId = persistent_fid; | |
1804 | req->VolatileFileId = volatile_fid; | |
1805 | ||
1806 | /* 4 for RFC1001 length and 1 for Buffer */ | |
1807 | req->BufferOffset = | |
1808 | cpu_to_le16(sizeof(struct smb2_set_info_req) - 1 - 4); | |
1809 | req->BufferLength = cpu_to_le32(*size); | |
1810 | ||
1811 | inc_rfc1001_len(req, *size - 1 /* Buffer */); | |
1812 | ||
1813 | memcpy(req->Buffer, *data, *size); | |
1814 | ||
1815 | iov[0].iov_base = (char *)req; | |
1816 | /* 4 for RFC1001 length */ | |
1817 | iov[0].iov_len = get_rfc1002_length(req) + 4; | |
1818 | ||
1819 | for (i = 1; i < num; i++) { | |
1820 | inc_rfc1001_len(req, size[i]); | |
1821 | le32_add_cpu(&req->BufferLength, size[i]); | |
1822 | iov[i].iov_base = (char *)data[i]; | |
1823 | iov[i].iov_len = size[i]; | |
1824 | } | |
1825 | ||
1826 | rc = SendReceive2(xid, ses, iov, num, &resp_buftype, 0); | |
1827 | rsp = (struct smb2_set_info_rsp *)iov[0].iov_base; | |
1828 | ||
1829 | if (rc != 0) { | |
1830 | cifs_stats_fail_inc(tcon, SMB2_SET_INFO_HE); | |
1831 | goto out; | |
1832 | } | |
1833 | ||
1834 | if (rsp == NULL) { | |
1835 | rc = -EIO; | |
1836 | goto out; | |
1837 | } | |
1838 | ||
1839 | out: | |
1840 | free_rsp_buf(resp_buftype, rsp); | |
1841 | kfree(iov); | |
1842 | return rc; | |
1843 | } | |
1844 | ||
1845 | int | |
1846 | SMB2_rename(const unsigned int xid, struct cifs_tcon *tcon, | |
1847 | u64 persistent_fid, u64 volatile_fid, __le16 *target_file) | |
1848 | { | |
1849 | struct smb2_file_rename_info info; | |
1850 | void **data; | |
1851 | unsigned int size[2]; | |
1852 | int rc; | |
1853 | int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX)); | |
1854 | ||
1855 | data = kmalloc(sizeof(void *) * 2, GFP_KERNEL); | |
1856 | if (!data) | |
1857 | return -ENOMEM; | |
1858 | ||
1859 | info.ReplaceIfExists = 1; /* 1 = replace existing target with new */ | |
1860 | /* 0 = fail if target already exists */ | |
1861 | info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */ | |
1862 | info.FileNameLength = cpu_to_le32(len); | |
1863 | ||
1864 | data[0] = &info; | |
1865 | size[0] = sizeof(struct smb2_file_rename_info); | |
1866 | ||
1867 | data[1] = target_file; | |
1868 | size[1] = len + 2 /* null */; | |
1869 | ||
1870 | rc = send_set_info(xid, tcon, persistent_fid, volatile_fid, | |
c839ff24 PS |
1871 | current->tgid, FILE_RENAME_INFORMATION, 2, data, |
1872 | size); | |
35143eb5 PS |
1873 | kfree(data); |
1874 | return rc; | |
1875 | } | |
568798cc PS |
1876 | |
1877 | int | |
1878 | SMB2_set_hardlink(const unsigned int xid, struct cifs_tcon *tcon, | |
1879 | u64 persistent_fid, u64 volatile_fid, __le16 *target_file) | |
1880 | { | |
1881 | struct smb2_file_link_info info; | |
1882 | void **data; | |
1883 | unsigned int size[2]; | |
1884 | int rc; | |
1885 | int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX)); | |
1886 | ||
1887 | data = kmalloc(sizeof(void *) * 2, GFP_KERNEL); | |
1888 | if (!data) | |
1889 | return -ENOMEM; | |
1890 | ||
1891 | info.ReplaceIfExists = 0; /* 1 = replace existing link with new */ | |
1892 | /* 0 = fail if link already exists */ | |
1893 | info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */ | |
1894 | info.FileNameLength = cpu_to_le32(len); | |
1895 | ||
1896 | data[0] = &info; | |
1897 | size[0] = sizeof(struct smb2_file_link_info); | |
1898 | ||
1899 | data[1] = target_file; | |
1900 | size[1] = len + 2 /* null */; | |
1901 | ||
1902 | rc = send_set_info(xid, tcon, persistent_fid, volatile_fid, | |
c839ff24 | 1903 | current->tgid, FILE_LINK_INFORMATION, 2, data, size); |
568798cc PS |
1904 | kfree(data); |
1905 | return rc; | |
1906 | } | |
c839ff24 PS |
1907 | |
1908 | int | |
1909 | SMB2_set_eof(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, | |
1910 | u64 volatile_fid, u32 pid, __le64 *eof) | |
1911 | { | |
1912 | struct smb2_file_eof_info info; | |
1913 | void *data; | |
1914 | unsigned int size; | |
1915 | ||
1916 | info.EndOfFile = *eof; | |
1917 | ||
1918 | data = &info; | |
1919 | size = sizeof(struct smb2_file_eof_info); | |
1920 | ||
1921 | return send_set_info(xid, tcon, persistent_fid, volatile_fid, pid, | |
1922 | FILE_END_OF_FILE_INFORMATION, 1, &data, &size); | |
1923 | } | |
1feeaac7 PS |
1924 | |
1925 | int | |
1926 | SMB2_set_info(const unsigned int xid, struct cifs_tcon *tcon, | |
1927 | u64 persistent_fid, u64 volatile_fid, FILE_BASIC_INFO *buf) | |
1928 | { | |
1929 | unsigned int size; | |
1930 | size = sizeof(FILE_BASIC_INFO); | |
1931 | return send_set_info(xid, tcon, persistent_fid, volatile_fid, | |
1932 | current->tgid, FILE_BASIC_INFORMATION, 1, | |
1933 | (void **)&buf, &size); | |
1934 | } | |
983c88a4 PS |
1935 | |
1936 | int | |
1937 | SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon, | |
1938 | const u64 persistent_fid, const u64 volatile_fid, | |
1939 | __u8 oplock_level) | |
1940 | { | |
1941 | int rc; | |
1942 | struct smb2_oplock_break *req = NULL; | |
1943 | ||
1944 | cFYI(1, "SMB2_oplock_break"); | |
1945 | rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req); | |
1946 | ||
1947 | if (rc) | |
1948 | return rc; | |
1949 | ||
1950 | req->VolatileFid = volatile_fid; | |
1951 | req->PersistentFid = persistent_fid; | |
1952 | req->OplockLevel = oplock_level; | |
1953 | req->hdr.CreditRequest = cpu_to_le16(1); | |
1954 | ||
1955 | rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, CIFS_OBREAK_OP); | |
1956 | /* SMB2 buffer freed by function above */ | |
1957 | ||
1958 | if (rc) { | |
1959 | cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE); | |
1960 | cFYI(1, "Send error in Oplock Break = %d", rc); | |
1961 | } | |
1962 | ||
1963 | return rc; | |
1964 | } | |
6fc05c25 PS |
1965 | |
1966 | static void | |
1967 | copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info *pfs_inf, | |
1968 | struct kstatfs *kst) | |
1969 | { | |
1970 | kst->f_bsize = le32_to_cpu(pfs_inf->BytesPerSector) * | |
1971 | le32_to_cpu(pfs_inf->SectorsPerAllocationUnit); | |
1972 | kst->f_blocks = le64_to_cpu(pfs_inf->TotalAllocationUnits); | |
1973 | kst->f_bfree = le64_to_cpu(pfs_inf->ActualAvailableAllocationUnits); | |
1974 | kst->f_bavail = le64_to_cpu(pfs_inf->CallerAvailableAllocationUnits); | |
1975 | return; | |
1976 | } | |
1977 | ||
1978 | static int | |
1979 | build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon, int level, | |
1980 | int outbuf_len, u64 persistent_fid, u64 volatile_fid) | |
1981 | { | |
1982 | int rc; | |
1983 | struct smb2_query_info_req *req; | |
1984 | ||
1985 | cFYI(1, "Query FSInfo level %d", level); | |
1986 | ||
1987 | if ((tcon->ses == NULL) || (tcon->ses->server == NULL)) | |
1988 | return -EIO; | |
1989 | ||
1990 | rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req); | |
1991 | if (rc) | |
1992 | return rc; | |
1993 | ||
1994 | req->InfoType = SMB2_O_INFO_FILESYSTEM; | |
1995 | req->FileInfoClass = level; | |
1996 | req->PersistentFileId = persistent_fid; | |
1997 | req->VolatileFileId = volatile_fid; | |
1998 | /* 4 for rfc1002 length field and 1 for pad */ | |
1999 | req->InputBufferOffset = | |
2000 | cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4); | |
2001 | req->OutputBufferLength = cpu_to_le32( | |
2002 | outbuf_len + sizeof(struct smb2_query_info_rsp) - 1 - 4); | |
2003 | ||
2004 | iov->iov_base = (char *)req; | |
2005 | /* 4 for rfc1002 length field */ | |
2006 | iov->iov_len = get_rfc1002_length(req) + 4; | |
2007 | return 0; | |
2008 | } | |
2009 | ||
2010 | int | |
2011 | SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon, | |
2012 | u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata) | |
2013 | { | |
2014 | struct smb2_query_info_rsp *rsp = NULL; | |
2015 | struct kvec iov; | |
2016 | int rc = 0; | |
2017 | int resp_buftype; | |
2018 | struct cifs_ses *ses = tcon->ses; | |
2019 | struct smb2_fs_full_size_info *info = NULL; | |
2020 | ||
2021 | rc = build_qfs_info_req(&iov, tcon, FS_FULL_SIZE_INFORMATION, | |
2022 | sizeof(struct smb2_fs_full_size_info), | |
2023 | persistent_fid, volatile_fid); | |
2024 | if (rc) | |
2025 | return rc; | |
2026 | ||
2027 | rc = SendReceive2(xid, ses, &iov, 1, &resp_buftype, 0); | |
2028 | if (rc) { | |
2029 | cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE); | |
2030 | goto qinf_exit; | |
2031 | } | |
2032 | rsp = (struct smb2_query_info_rsp *)iov.iov_base; | |
2033 | ||
2034 | info = (struct smb2_fs_full_size_info *)(4 /* RFC1001 len */ + | |
2035 | le16_to_cpu(rsp->OutputBufferOffset) + (char *)&rsp->hdr); | |
2036 | rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset), | |
2037 | le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr, | |
2038 | sizeof(struct smb2_fs_full_size_info)); | |
2039 | if (!rc) | |
2040 | copy_fs_info_to_kstatfs(info, fsdata); | |
2041 | ||
2042 | qinf_exit: | |
2043 | free_rsp_buf(resp_buftype, iov.iov_base); | |
2044 | return rc; | |
2045 | } |