]>
Commit | Line | Data |
---|---|---|
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 PS |
35 | #include <linux/uaccess.h> |
36 | #include <linux/xattr.h> | |
37 | #include "smb2pdu.h" | |
38 | #include "cifsglob.h" | |
39 | #include "cifsacl.h" | |
40 | #include "cifsproto.h" | |
41 | #include "smb2proto.h" | |
42 | #include "cifs_unicode.h" | |
43 | #include "cifs_debug.h" | |
44 | #include "ntlmssp.h" | |
45 | #include "smb2status.h" | |
09a4707e | 46 | #include "smb2glob.h" |
ec2e4523 PS |
47 | |
48 | /* | |
49 | * The following table defines the expected "StructureSize" of SMB2 requests | |
50 | * in order by SMB2 command. This is similar to "wct" in SMB/CIFS requests. | |
51 | * | |
52 | * Note that commands are defined in smb2pdu.h in le16 but the array below is | |
53 | * indexed by command in host byte order. | |
54 | */ | |
55 | static const int smb2_req_struct_sizes[NUMBER_OF_SMB2_COMMANDS] = { | |
56 | /* SMB2_NEGOTIATE */ 36, | |
57 | /* SMB2_SESSION_SETUP */ 25, | |
58 | /* SMB2_LOGOFF */ 4, | |
59 | /* SMB2_TREE_CONNECT */ 9, | |
60 | /* SMB2_TREE_DISCONNECT */ 4, | |
61 | /* SMB2_CREATE */ 57, | |
62 | /* SMB2_CLOSE */ 24, | |
63 | /* SMB2_FLUSH */ 24, | |
64 | /* SMB2_READ */ 49, | |
65 | /* SMB2_WRITE */ 49, | |
66 | /* SMB2_LOCK */ 48, | |
67 | /* SMB2_IOCTL */ 57, | |
68 | /* SMB2_CANCEL */ 4, | |
69 | /* SMB2_ECHO */ 4, | |
70 | /* SMB2_QUERY_DIRECTORY */ 33, | |
71 | /* SMB2_CHANGE_NOTIFY */ 32, | |
72 | /* SMB2_QUERY_INFO */ 41, | |
73 | /* SMB2_SET_INFO */ 33, | |
74 | /* SMB2_OPLOCK_BREAK */ 24 /* BB this is 36 for LEASE_BREAK variant */ | |
75 | }; | |
76 | ||
77 | ||
78 | static void | |
79 | smb2_hdr_assemble(struct smb2_hdr *hdr, __le16 smb2_cmd /* command */ , | |
80 | const struct cifs_tcon *tcon) | |
81 | { | |
82 | struct smb2_pdu *pdu = (struct smb2_pdu *)hdr; | |
83 | char *temp = (char *)hdr; | |
84 | /* lookup word count ie StructureSize from table */ | |
85 | __u16 parmsize = smb2_req_struct_sizes[le16_to_cpu(smb2_cmd)]; | |
86 | ||
87 | /* | |
88 | * smaller than SMALL_BUFFER_SIZE but bigger than fixed area of | |
89 | * largest operations (Create) | |
90 | */ | |
91 | memset(temp, 0, 256); | |
92 | ||
93 | /* Note this is only network field converted to big endian */ | |
94 | hdr->smb2_buf_length = cpu_to_be32(parmsize + sizeof(struct smb2_hdr) | |
95 | - 4 /* RFC 1001 length field itself not counted */); | |
96 | ||
97 | hdr->ProtocolId[0] = 0xFE; | |
98 | hdr->ProtocolId[1] = 'S'; | |
99 | hdr->ProtocolId[2] = 'M'; | |
100 | hdr->ProtocolId[3] = 'B'; | |
101 | hdr->StructureSize = cpu_to_le16(64); | |
102 | hdr->Command = smb2_cmd; | |
103 | hdr->CreditRequest = cpu_to_le16(2); /* BB make this dynamic */ | |
104 | hdr->ProcessId = cpu_to_le32((__u16)current->tgid); | |
105 | ||
106 | if (!tcon) | |
107 | goto out; | |
108 | ||
109 | hdr->TreeId = tcon->tid; | |
110 | /* Uid is not converted */ | |
111 | if (tcon->ses) | |
112 | hdr->SessionId = tcon->ses->Suid; | |
113 | /* BB check following DFS flags BB */ | |
114 | /* BB do we have to add check for SHI1005_FLAGS_DFS_ROOT too? */ | |
faaf946a PS |
115 | if (tcon->share_flags & SHI1005_FLAGS_DFS) |
116 | hdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS; | |
ec2e4523 PS |
117 | /* BB how does SMB2 do case sensitive? */ |
118 | /* if (tcon->nocase) | |
119 | hdr->Flags |= SMBFLG_CASELESS; */ | |
120 | /* if (tcon->ses && tcon->ses->server && | |
121 | (tcon->ses->server->sec_mode & SECMODE_SIGN_REQUIRED)) | |
122 | hdr->Flags |= SMB2_FLAGS_SIGNED; */ | |
123 | out: | |
124 | pdu->StructureSize2 = cpu_to_le16(parmsize); | |
125 | return; | |
126 | } | |
127 | ||
128 | static int | |
129 | smb2_reconnect(__le16 smb2_command, struct cifs_tcon *tcon) | |
130 | { | |
131 | int rc = 0; | |
aa24d1e9 PS |
132 | struct nls_table *nls_codepage; |
133 | struct cifs_ses *ses; | |
134 | struct TCP_Server_Info *server; | |
135 | ||
136 | /* | |
137 | * SMB2s NegProt, SessSetup, Logoff do not have tcon yet so | |
138 | * check for tcp and smb session status done differently | |
139 | * for those three - in the calling routine. | |
140 | */ | |
141 | if (tcon == NULL) | |
142 | return rc; | |
143 | ||
144 | if (smb2_command == SMB2_TREE_CONNECT) | |
145 | return rc; | |
146 | ||
147 | if (tcon->tidStatus == CifsExiting) { | |
148 | /* | |
149 | * only tree disconnect, open, and write, | |
150 | * (and ulogoff which does not have tcon) | |
151 | * are allowed as we start force umount. | |
152 | */ | |
153 | if ((smb2_command != SMB2_WRITE) && | |
154 | (smb2_command != SMB2_CREATE) && | |
155 | (smb2_command != SMB2_TREE_DISCONNECT)) { | |
156 | cFYI(1, "can not send cmd %d while umounting", | |
157 | smb2_command); | |
158 | return -ENODEV; | |
159 | } | |
160 | } | |
161 | if ((!tcon->ses) || (tcon->ses->status == CifsExiting) || | |
162 | (!tcon->ses->server)) | |
163 | return -EIO; | |
164 | ||
165 | ses = tcon->ses; | |
166 | server = ses->server; | |
167 | ||
168 | /* | |
169 | * Give demultiplex thread up to 10 seconds to reconnect, should be | |
170 | * greater than cifs socket timeout which is 7 seconds | |
171 | */ | |
172 | while (server->tcpStatus == CifsNeedReconnect) { | |
173 | /* | |
174 | * Return to caller for TREE_DISCONNECT and LOGOFF and CLOSE | |
175 | * here since they are implicitly done when session drops. | |
176 | */ | |
177 | switch (smb2_command) { | |
178 | /* | |
179 | * BB Should we keep oplock break and add flush to exceptions? | |
180 | */ | |
181 | case SMB2_TREE_DISCONNECT: | |
182 | case SMB2_CANCEL: | |
183 | case SMB2_CLOSE: | |
184 | case SMB2_OPLOCK_BREAK: | |
185 | return -EAGAIN; | |
186 | } | |
187 | ||
188 | wait_event_interruptible_timeout(server->response_q, | |
189 | (server->tcpStatus != CifsNeedReconnect), 10 * HZ); | |
190 | ||
191 | /* are we still trying to reconnect? */ | |
192 | if (server->tcpStatus != CifsNeedReconnect) | |
193 | break; | |
194 | ||
195 | /* | |
196 | * on "soft" mounts we wait once. Hard mounts keep | |
197 | * retrying until process is killed or server comes | |
198 | * back on-line | |
199 | */ | |
200 | if (!tcon->retry) { | |
201 | cFYI(1, "gave up waiting on reconnect in smb_init"); | |
202 | return -EHOSTDOWN; | |
203 | } | |
204 | } | |
205 | ||
206 | if (!tcon->ses->need_reconnect && !tcon->need_reconnect) | |
207 | return rc; | |
208 | ||
209 | nls_codepage = load_nls_default(); | |
210 | ||
211 | /* | |
212 | * need to prevent multiple threads trying to simultaneously reconnect | |
213 | * the same SMB session | |
214 | */ | |
215 | mutex_lock(&tcon->ses->session_mutex); | |
216 | rc = cifs_negotiate_protocol(0, tcon->ses); | |
217 | if (!rc && tcon->ses->need_reconnect) | |
218 | rc = cifs_setup_session(0, tcon->ses, nls_codepage); | |
219 | ||
220 | if (rc || !tcon->need_reconnect) { | |
221 | mutex_unlock(&tcon->ses->session_mutex); | |
222 | goto out; | |
223 | } | |
224 | ||
225 | cifs_mark_open_files_invalid(tcon); | |
226 | rc = SMB2_tcon(0, tcon->ses, tcon->treeName, tcon, nls_codepage); | |
227 | mutex_unlock(&tcon->ses->session_mutex); | |
228 | cFYI(1, "reconnect tcon rc = %d", rc); | |
229 | if (rc) | |
230 | goto out; | |
231 | atomic_inc(&tconInfoReconnectCount); | |
232 | /* | |
233 | * BB FIXME add code to check if wsize needs update due to negotiated | |
234 | * smb buffer size shrinking. | |
235 | */ | |
236 | out: | |
237 | /* | |
238 | * Check if handle based operation so we know whether we can continue | |
239 | * or not without returning to caller to reset file handle. | |
240 | */ | |
241 | /* | |
242 | * BB Is flush done by server on drop of tcp session? Should we special | |
243 | * case it and skip above? | |
244 | */ | |
245 | switch (smb2_command) { | |
246 | case SMB2_FLUSH: | |
247 | case SMB2_READ: | |
248 | case SMB2_WRITE: | |
249 | case SMB2_LOCK: | |
250 | case SMB2_IOCTL: | |
251 | case SMB2_QUERY_DIRECTORY: | |
252 | case SMB2_CHANGE_NOTIFY: | |
253 | case SMB2_QUERY_INFO: | |
254 | case SMB2_SET_INFO: | |
255 | return -EAGAIN; | |
256 | } | |
257 | unload_nls(nls_codepage); | |
ec2e4523 PS |
258 | return rc; |
259 | } | |
260 | ||
261 | /* | |
262 | * Allocate and return pointer to an SMB request hdr, and set basic | |
263 | * SMB information in the SMB header. If the return code is zero, this | |
264 | * function must have filled in request_buf pointer. | |
265 | */ | |
266 | static int | |
267 | small_smb2_init(__le16 smb2_command, struct cifs_tcon *tcon, | |
268 | void **request_buf) | |
269 | { | |
270 | int rc = 0; | |
271 | ||
272 | rc = smb2_reconnect(smb2_command, tcon); | |
273 | if (rc) | |
274 | return rc; | |
275 | ||
276 | /* BB eventually switch this to SMB2 specific small buf size */ | |
277 | *request_buf = cifs_small_buf_get(); | |
278 | if (*request_buf == NULL) { | |
279 | /* BB should we add a retry in here if not a writepage? */ | |
280 | return -ENOMEM; | |
281 | } | |
282 | ||
283 | smb2_hdr_assemble((struct smb2_hdr *) *request_buf, smb2_command, tcon); | |
284 | ||
285 | if (tcon != NULL) { | |
286 | #ifdef CONFIG_CIFS_STATS2 | |
ec2e4523 PS |
287 | uint16_t com_code = le16_to_cpu(smb2_command); |
288 | cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_sent[com_code]); | |
ec2e4523 PS |
289 | #endif |
290 | cifs_stats_inc(&tcon->num_smbs_sent); | |
291 | } | |
292 | ||
293 | return rc; | |
294 | } | |
295 | ||
296 | static void | |
297 | free_rsp_buf(int resp_buftype, void *rsp) | |
298 | { | |
299 | if (resp_buftype == CIFS_SMALL_BUFFER) | |
300 | cifs_small_buf_release(rsp); | |
301 | else if (resp_buftype == CIFS_LARGE_BUFFER) | |
302 | cifs_buf_release(rsp); | |
303 | } | |
304 | ||
305 | #define SMB2_NUM_PROT 1 | |
306 | ||
307 | #define SMB2_PROT 0 | |
308 | #define SMB21_PROT 1 | |
309 | #define BAD_PROT 0xFFFF | |
310 | ||
311 | #define SMB2_PROT_ID 0x0202 | |
312 | #define SMB21_PROT_ID 0x0210 | |
313 | #define BAD_PROT_ID 0xFFFF | |
314 | ||
315 | static struct { | |
316 | int index; | |
317 | __le16 name; | |
318 | } smb2protocols[] = { | |
319 | {SMB2_PROT, cpu_to_le16(SMB2_PROT_ID)}, | |
320 | {SMB21_PROT, cpu_to_le16(SMB21_PROT_ID)}, | |
321 | {BAD_PROT, cpu_to_le16(BAD_PROT_ID)} | |
322 | }; | |
323 | ||
324 | /* | |
325 | * | |
326 | * SMB2 Worker functions follow: | |
327 | * | |
328 | * The general structure of the worker functions is: | |
329 | * 1) Call smb2_init (assembles SMB2 header) | |
330 | * 2) Initialize SMB2 command specific fields in fixed length area of SMB | |
331 | * 3) Call smb_sendrcv2 (sends request on socket and waits for response) | |
332 | * 4) Decode SMB2 command specific fields in the fixed length area | |
333 | * 5) Decode variable length data area (if any for this SMB2 command type) | |
334 | * 6) Call free smb buffer | |
335 | * 7) return | |
336 | * | |
337 | */ | |
338 | ||
339 | int | |
340 | SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses) | |
341 | { | |
342 | struct smb2_negotiate_req *req; | |
343 | struct smb2_negotiate_rsp *rsp; | |
344 | struct kvec iov[1]; | |
345 | int rc = 0; | |
346 | int resp_buftype; | |
347 | struct TCP_Server_Info *server; | |
348 | unsigned int sec_flags; | |
349 | u16 i; | |
350 | u16 temp = 0; | |
351 | int blob_offset, blob_length; | |
352 | char *security_blob; | |
353 | int flags = CIFS_NEG_OP; | |
354 | ||
355 | cFYI(1, "Negotiate protocol"); | |
356 | ||
357 | if (ses->server) | |
358 | server = ses->server; | |
359 | else { | |
360 | rc = -EIO; | |
361 | return rc; | |
362 | } | |
363 | ||
364 | rc = small_smb2_init(SMB2_NEGOTIATE, NULL, (void **) &req); | |
365 | if (rc) | |
366 | return rc; | |
367 | ||
368 | /* if any of auth flags (ie not sign or seal) are overriden use them */ | |
369 | if (ses->overrideSecFlg & (~(CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL))) | |
370 | sec_flags = ses->overrideSecFlg; /* BB FIXME fix sign flags?*/ | |
371 | else /* if override flags set only sign/seal OR them with global auth */ | |
372 | sec_flags = global_secflags | ses->overrideSecFlg; | |
373 | ||
374 | cFYI(1, "sec_flags 0x%x", sec_flags); | |
375 | ||
376 | req->hdr.SessionId = 0; | |
377 | ||
378 | for (i = 0; i < SMB2_NUM_PROT; i++) | |
379 | req->Dialects[i] = smb2protocols[i].name; | |
380 | ||
381 | req->DialectCount = cpu_to_le16(i); | |
382 | inc_rfc1001_len(req, i * 2); | |
383 | ||
384 | /* only one of SMB2 signing flags may be set in SMB2 request */ | |
385 | if ((sec_flags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN) | |
386 | temp = SMB2_NEGOTIATE_SIGNING_REQUIRED; | |
387 | else if (sec_flags & CIFSSEC_MAY_SIGN) /* MAY_SIGN is a single flag */ | |
388 | temp = SMB2_NEGOTIATE_SIGNING_ENABLED; | |
389 | ||
390 | req->SecurityMode = cpu_to_le16(temp); | |
391 | ||
392 | req->Capabilities = cpu_to_le32(SMB2_GLOBAL_CAP_DFS); | |
393 | ||
394 | iov[0].iov_base = (char *)req; | |
395 | /* 4 for rfc1002 length field */ | |
396 | iov[0].iov_len = get_rfc1002_length(req) + 4; | |
397 | ||
398 | rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, flags); | |
399 | ||
400 | rsp = (struct smb2_negotiate_rsp *)iov[0].iov_base; | |
401 | /* | |
402 | * No tcon so can't do | |
403 | * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]); | |
404 | */ | |
405 | if (rc != 0) | |
406 | goto neg_exit; | |
407 | ||
408 | if (rsp == NULL) { | |
409 | rc = -EIO; | |
410 | goto neg_exit; | |
411 | } | |
412 | ||
413 | cFYI(1, "mode 0x%x", rsp->SecurityMode); | |
414 | ||
415 | if (rsp->DialectRevision == smb2protocols[SMB21_PROT].name) | |
416 | cFYI(1, "negotiated smb2.1 dialect"); | |
417 | else if (rsp->DialectRevision == smb2protocols[SMB2_PROT].name) | |
418 | cFYI(1, "negotiated smb2 dialect"); | |
419 | else { | |
420 | cERROR(1, "Illegal dialect returned by server %d", | |
421 | le16_to_cpu(rsp->DialectRevision)); | |
422 | rc = -EIO; | |
423 | goto neg_exit; | |
424 | } | |
425 | server->dialect = le16_to_cpu(rsp->DialectRevision); | |
426 | ||
427 | server->maxBuf = le32_to_cpu(rsp->MaxTransactSize); | |
428 | server->max_read = le32_to_cpu(rsp->MaxReadSize); | |
429 | server->max_write = le32_to_cpu(rsp->MaxWriteSize); | |
430 | /* BB Do we need to validate the SecurityMode? */ | |
431 | server->sec_mode = le16_to_cpu(rsp->SecurityMode); | |
432 | server->capabilities = le32_to_cpu(rsp->Capabilities); | |
29e20f9c PS |
433 | /* Internal types */ |
434 | server->capabilities |= SMB2_NT_FIND | SMB2_LARGE_FILES; | |
ec2e4523 PS |
435 | |
436 | security_blob = smb2_get_data_area_len(&blob_offset, &blob_length, | |
437 | &rsp->hdr); | |
438 | if (blob_length == 0) { | |
439 | cERROR(1, "missing security blob on negprot"); | |
440 | rc = -EIO; | |
441 | goto neg_exit; | |
442 | } | |
443 | #ifdef CONFIG_SMB2_ASN1 /* BB REMOVEME when updated asn1.c ready */ | |
444 | rc = decode_neg_token_init(security_blob, blob_length, | |
445 | &server->sec_type); | |
446 | if (rc == 1) | |
447 | rc = 0; | |
448 | else if (rc == 0) { | |
449 | rc = -EIO; | |
450 | goto neg_exit; | |
451 | } | |
452 | #endif | |
453 | ||
454 | neg_exit: | |
455 | free_rsp_buf(resp_buftype, rsp); | |
456 | return rc; | |
457 | } | |
5478f9ba PS |
458 | |
459 | int | |
460 | SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses, | |
461 | const struct nls_table *nls_cp) | |
462 | { | |
463 | struct smb2_sess_setup_req *req; | |
464 | struct smb2_sess_setup_rsp *rsp = NULL; | |
465 | struct kvec iov[2]; | |
466 | int rc = 0; | |
467 | int resp_buftype; | |
468 | __le32 phase = NtLmNegotiate; /* NTLMSSP, if needed, is multistage */ | |
469 | struct TCP_Server_Info *server; | |
470 | unsigned int sec_flags; | |
471 | u8 temp = 0; | |
472 | u16 blob_length = 0; | |
473 | char *security_blob; | |
474 | char *ntlmssp_blob = NULL; | |
475 | bool use_spnego = false; /* else use raw ntlmssp */ | |
476 | ||
477 | cFYI(1, "Session Setup"); | |
478 | ||
479 | if (ses->server) | |
480 | server = ses->server; | |
481 | else { | |
482 | rc = -EIO; | |
483 | return rc; | |
484 | } | |
485 | ||
486 | /* | |
487 | * If memory allocation is successful, caller of this function | |
488 | * frees it. | |
489 | */ | |
490 | ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL); | |
491 | if (!ses->ntlmssp) | |
492 | return -ENOMEM; | |
493 | ||
494 | ses->server->secType = RawNTLMSSP; | |
495 | ||
496 | ssetup_ntlmssp_authenticate: | |
497 | if (phase == NtLmChallenge) | |
498 | phase = NtLmAuthenticate; /* if ntlmssp, now final phase */ | |
499 | ||
500 | rc = small_smb2_init(SMB2_SESSION_SETUP, NULL, (void **) &req); | |
501 | if (rc) | |
502 | return rc; | |
503 | ||
504 | /* if any of auth flags (ie not sign or seal) are overriden use them */ | |
505 | if (ses->overrideSecFlg & (~(CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL))) | |
506 | sec_flags = ses->overrideSecFlg; /* BB FIXME fix sign flags?*/ | |
507 | else /* if override flags set only sign/seal OR them with global auth */ | |
508 | sec_flags = global_secflags | ses->overrideSecFlg; | |
509 | ||
510 | cFYI(1, "sec_flags 0x%x", sec_flags); | |
511 | ||
512 | req->hdr.SessionId = 0; /* First session, not a reauthenticate */ | |
513 | req->VcNumber = 0; /* MBZ */ | |
514 | /* to enable echos and oplocks */ | |
515 | req->hdr.CreditRequest = cpu_to_le16(3); | |
516 | ||
517 | /* only one of SMB2 signing flags may be set in SMB2 request */ | |
518 | if ((sec_flags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN) | |
519 | temp = SMB2_NEGOTIATE_SIGNING_REQUIRED; | |
520 | else if (ses->server->sec_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED) | |
521 | temp = SMB2_NEGOTIATE_SIGNING_REQUIRED; | |
522 | else if (sec_flags & CIFSSEC_MAY_SIGN) /* MAY_SIGN is a single flag */ | |
523 | temp = SMB2_NEGOTIATE_SIGNING_ENABLED; | |
524 | ||
525 | req->SecurityMode = temp; | |
526 | req->Capabilities = 0; | |
527 | req->Channel = 0; /* MBZ */ | |
528 | ||
529 | iov[0].iov_base = (char *)req; | |
530 | /* 4 for rfc1002 length field and 1 for pad */ | |
531 | iov[0].iov_len = get_rfc1002_length(req) + 4 - 1; | |
532 | if (phase == NtLmNegotiate) { | |
533 | ntlmssp_blob = kmalloc(sizeof(struct _NEGOTIATE_MESSAGE), | |
534 | GFP_KERNEL); | |
535 | if (ntlmssp_blob == NULL) { | |
536 | rc = -ENOMEM; | |
537 | goto ssetup_exit; | |
538 | } | |
539 | build_ntlmssp_negotiate_blob(ntlmssp_blob, ses); | |
540 | if (use_spnego) { | |
541 | /* blob_length = build_spnego_ntlmssp_blob( | |
542 | &security_blob, | |
543 | sizeof(struct _NEGOTIATE_MESSAGE), | |
544 | ntlmssp_blob); */ | |
545 | /* BB eventually need to add this */ | |
546 | cERROR(1, "spnego not supported for SMB2 yet"); | |
547 | rc = -EOPNOTSUPP; | |
548 | kfree(ntlmssp_blob); | |
549 | goto ssetup_exit; | |
550 | } else { | |
551 | blob_length = sizeof(struct _NEGOTIATE_MESSAGE); | |
552 | /* with raw NTLMSSP we don't encapsulate in SPNEGO */ | |
553 | security_blob = ntlmssp_blob; | |
554 | } | |
555 | } else if (phase == NtLmAuthenticate) { | |
556 | req->hdr.SessionId = ses->Suid; | |
557 | ntlmssp_blob = kzalloc(sizeof(struct _NEGOTIATE_MESSAGE) + 500, | |
558 | GFP_KERNEL); | |
559 | if (ntlmssp_blob == NULL) { | |
560 | cERROR(1, "failed to malloc ntlmssp blob"); | |
561 | rc = -ENOMEM; | |
562 | goto ssetup_exit; | |
563 | } | |
564 | rc = build_ntlmssp_auth_blob(ntlmssp_blob, &blob_length, ses, | |
565 | nls_cp); | |
566 | if (rc) { | |
567 | cFYI(1, "build_ntlmssp_auth_blob failed %d", rc); | |
568 | goto ssetup_exit; /* BB double check error handling */ | |
569 | } | |
570 | if (use_spnego) { | |
571 | /* blob_length = build_spnego_ntlmssp_blob( | |
572 | &security_blob, | |
573 | blob_length, | |
574 | ntlmssp_blob); */ | |
575 | cERROR(1, "spnego not supported for SMB2 yet"); | |
576 | rc = -EOPNOTSUPP; | |
577 | kfree(ntlmssp_blob); | |
578 | goto ssetup_exit; | |
579 | } else { | |
580 | security_blob = ntlmssp_blob; | |
581 | } | |
582 | } else { | |
583 | cERROR(1, "illegal ntlmssp phase"); | |
584 | rc = -EIO; | |
585 | goto ssetup_exit; | |
586 | } | |
587 | ||
588 | /* Testing shows that buffer offset must be at location of Buffer[0] */ | |
589 | req->SecurityBufferOffset = | |
590 | cpu_to_le16(sizeof(struct smb2_sess_setup_req) - | |
591 | 1 /* pad */ - 4 /* rfc1001 len */); | |
592 | req->SecurityBufferLength = cpu_to_le16(blob_length); | |
593 | iov[1].iov_base = security_blob; | |
594 | iov[1].iov_len = blob_length; | |
595 | ||
596 | inc_rfc1001_len(req, blob_length - 1 /* pad */); | |
597 | ||
598 | /* BB add code to build os and lm fields */ | |
599 | ||
600 | rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, CIFS_LOG_ERROR); | |
601 | ||
602 | kfree(security_blob); | |
603 | rsp = (struct smb2_sess_setup_rsp *)iov[0].iov_base; | |
604 | if (rsp->hdr.Status == STATUS_MORE_PROCESSING_REQUIRED) { | |
605 | if (phase != NtLmNegotiate) { | |
606 | cERROR(1, "Unexpected more processing error"); | |
607 | goto ssetup_exit; | |
608 | } | |
609 | if (offsetof(struct smb2_sess_setup_rsp, Buffer) - 4 != | |
610 | le16_to_cpu(rsp->SecurityBufferOffset)) { | |
611 | cERROR(1, "Invalid security buffer offset %d", | |
612 | le16_to_cpu(rsp->SecurityBufferOffset)); | |
613 | rc = -EIO; | |
614 | goto ssetup_exit; | |
615 | } | |
616 | ||
617 | /* NTLMSSP Negotiate sent now processing challenge (response) */ | |
618 | phase = NtLmChallenge; /* process ntlmssp challenge */ | |
619 | rc = 0; /* MORE_PROCESSING is not an error here but expected */ | |
620 | ses->Suid = rsp->hdr.SessionId; | |
621 | rc = decode_ntlmssp_challenge(rsp->Buffer, | |
622 | le16_to_cpu(rsp->SecurityBufferLength), ses); | |
623 | } | |
624 | ||
625 | /* | |
626 | * BB eventually add code for SPNEGO decoding of NtlmChallenge blob, | |
627 | * but at least the raw NTLMSSP case works. | |
628 | */ | |
629 | /* | |
630 | * No tcon so can't do | |
631 | * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]); | |
632 | */ | |
633 | if (rc != 0) | |
634 | goto ssetup_exit; | |
635 | ||
636 | if (rsp == NULL) { | |
637 | rc = -EIO; | |
638 | goto ssetup_exit; | |
639 | } | |
640 | ||
641 | ses->session_flags = le16_to_cpu(rsp->SessionFlags); | |
642 | ssetup_exit: | |
643 | free_rsp_buf(resp_buftype, rsp); | |
644 | ||
645 | /* if ntlmssp, and negotiate succeeded, proceed to authenticate phase */ | |
646 | if ((phase == NtLmChallenge) && (rc == 0)) | |
647 | goto ssetup_ntlmssp_authenticate; | |
648 | return rc; | |
649 | } | |
650 | ||
651 | int | |
652 | SMB2_logoff(const unsigned int xid, struct cifs_ses *ses) | |
653 | { | |
654 | struct smb2_logoff_req *req; /* response is also trivial struct */ | |
655 | int rc = 0; | |
656 | struct TCP_Server_Info *server; | |
657 | ||
658 | cFYI(1, "disconnect session %p", ses); | |
659 | ||
660 | if (ses && (ses->server)) | |
661 | server = ses->server; | |
662 | else | |
663 | return -EIO; | |
664 | ||
665 | rc = small_smb2_init(SMB2_LOGOFF, NULL, (void **) &req); | |
666 | if (rc) | |
667 | return rc; | |
668 | ||
669 | /* since no tcon, smb2_init can not do this, so do here */ | |
670 | req->hdr.SessionId = ses->Suid; | |
671 | ||
672 | rc = SendReceiveNoRsp(xid, ses, (char *) &req->hdr, 0); | |
673 | /* | |
674 | * No tcon so can't do | |
675 | * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]); | |
676 | */ | |
677 | return rc; | |
678 | } | |
faaf946a PS |
679 | |
680 | static inline void cifs_stats_fail_inc(struct cifs_tcon *tcon, uint16_t code) | |
681 | { | |
d60622eb | 682 | cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_failed[code]); |
faaf946a PS |
683 | } |
684 | ||
685 | #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */) | |
686 | ||
687 | int | |
688 | SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree, | |
689 | struct cifs_tcon *tcon, const struct nls_table *cp) | |
690 | { | |
691 | struct smb2_tree_connect_req *req; | |
692 | struct smb2_tree_connect_rsp *rsp = NULL; | |
693 | struct kvec iov[2]; | |
694 | int rc = 0; | |
695 | int resp_buftype; | |
696 | int unc_path_len; | |
697 | struct TCP_Server_Info *server; | |
698 | __le16 *unc_path = NULL; | |
699 | ||
700 | cFYI(1, "TCON"); | |
701 | ||
702 | if ((ses->server) && tree) | |
703 | server = ses->server; | |
704 | else | |
705 | return -EIO; | |
706 | ||
707 | if (tcon && tcon->bad_network_name) | |
708 | return -ENOENT; | |
709 | ||
710 | unc_path = kmalloc(MAX_SHARENAME_LENGTH * 2, GFP_KERNEL); | |
711 | if (unc_path == NULL) | |
712 | return -ENOMEM; | |
713 | ||
714 | unc_path_len = cifs_strtoUTF16(unc_path, tree, strlen(tree), cp) + 1; | |
715 | unc_path_len *= 2; | |
716 | if (unc_path_len < 2) { | |
717 | kfree(unc_path); | |
718 | return -EINVAL; | |
719 | } | |
720 | ||
721 | rc = small_smb2_init(SMB2_TREE_CONNECT, tcon, (void **) &req); | |
722 | if (rc) { | |
723 | kfree(unc_path); | |
724 | return rc; | |
725 | } | |
726 | ||
727 | if (tcon == NULL) { | |
728 | /* since no tcon, smb2_init can not do this, so do here */ | |
729 | req->hdr.SessionId = ses->Suid; | |
730 | /* if (ses->server->sec_mode & SECMODE_SIGN_REQUIRED) | |
731 | req->hdr.Flags |= SMB2_FLAGS_SIGNED; */ | |
732 | } | |
733 | ||
734 | iov[0].iov_base = (char *)req; | |
735 | /* 4 for rfc1002 length field and 1 for pad */ | |
736 | iov[0].iov_len = get_rfc1002_length(req) + 4 - 1; | |
737 | ||
738 | /* Testing shows that buffer offset must be at location of Buffer[0] */ | |
739 | req->PathOffset = cpu_to_le16(sizeof(struct smb2_tree_connect_req) | |
740 | - 1 /* pad */ - 4 /* do not count rfc1001 len field */); | |
741 | req->PathLength = cpu_to_le16(unc_path_len - 2); | |
742 | iov[1].iov_base = unc_path; | |
743 | iov[1].iov_len = unc_path_len; | |
744 | ||
745 | inc_rfc1001_len(req, unc_path_len - 1 /* pad */); | |
746 | ||
747 | rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, 0); | |
748 | rsp = (struct smb2_tree_connect_rsp *)iov[0].iov_base; | |
749 | ||
750 | if (rc != 0) { | |
751 | if (tcon) { | |
752 | cifs_stats_fail_inc(tcon, SMB2_TREE_CONNECT_HE); | |
753 | tcon->need_reconnect = true; | |
754 | } | |
755 | goto tcon_error_exit; | |
756 | } | |
757 | ||
758 | if (rsp == NULL) { | |
759 | rc = -EIO; | |
760 | goto tcon_exit; | |
761 | } | |
762 | ||
763 | if (tcon == NULL) { | |
764 | ses->ipc_tid = rsp->hdr.TreeId; | |
765 | goto tcon_exit; | |
766 | } | |
767 | ||
768 | if (rsp->ShareType & SMB2_SHARE_TYPE_DISK) | |
769 | cFYI(1, "connection to disk share"); | |
770 | else if (rsp->ShareType & SMB2_SHARE_TYPE_PIPE) { | |
771 | tcon->ipc = true; | |
772 | cFYI(1, "connection to pipe share"); | |
773 | } else if (rsp->ShareType & SMB2_SHARE_TYPE_PRINT) { | |
774 | tcon->print = true; | |
775 | cFYI(1, "connection to printer"); | |
776 | } else { | |
777 | cERROR(1, "unknown share type %d", rsp->ShareType); | |
778 | rc = -EOPNOTSUPP; | |
779 | goto tcon_error_exit; | |
780 | } | |
781 | ||
782 | tcon->share_flags = le32_to_cpu(rsp->ShareFlags); | |
783 | tcon->maximal_access = le32_to_cpu(rsp->MaximalAccess); | |
784 | tcon->tidStatus = CifsGood; | |
785 | tcon->need_reconnect = false; | |
786 | tcon->tid = rsp->hdr.TreeId; | |
787 | strncpy(tcon->treeName, tree, MAX_TREE_SIZE); | |
788 | ||
789 | if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) && | |
790 | ((tcon->share_flags & SHI1005_FLAGS_DFS) == 0)) | |
791 | cERROR(1, "DFS capability contradicts DFS flag"); | |
792 | ||
793 | tcon_exit: | |
794 | free_rsp_buf(resp_buftype, rsp); | |
795 | kfree(unc_path); | |
796 | return rc; | |
797 | ||
798 | tcon_error_exit: | |
799 | if (rsp->hdr.Status == STATUS_BAD_NETWORK_NAME) { | |
800 | cERROR(1, "BAD_NETWORK_NAME: %s", tree); | |
801 | tcon->bad_network_name = true; | |
802 | } | |
803 | goto tcon_exit; | |
804 | } | |
805 | ||
806 | int | |
807 | SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon) | |
808 | { | |
809 | struct smb2_tree_disconnect_req *req; /* response is trivial */ | |
810 | int rc = 0; | |
811 | struct TCP_Server_Info *server; | |
812 | struct cifs_ses *ses = tcon->ses; | |
813 | ||
814 | cFYI(1, "Tree Disconnect"); | |
815 | ||
816 | if (ses && (ses->server)) | |
817 | server = ses->server; | |
818 | else | |
819 | return -EIO; | |
820 | ||
821 | if ((tcon->need_reconnect) || (tcon->ses->need_reconnect)) | |
822 | return 0; | |
823 | ||
824 | rc = small_smb2_init(SMB2_TREE_DISCONNECT, tcon, (void **) &req); | |
825 | if (rc) | |
826 | return rc; | |
827 | ||
828 | rc = SendReceiveNoRsp(xid, ses, (char *)&req->hdr, 0); | |
829 | if (rc) | |
830 | cifs_stats_fail_inc(tcon, SMB2_TREE_DISCONNECT_HE); | |
831 | ||
832 | return rc; | |
833 | } | |
2503a0db PS |
834 | |
835 | int | |
836 | SMB2_open(const unsigned int xid, struct cifs_tcon *tcon, __le16 *path, | |
837 | u64 *persistent_fid, u64 *volatile_fid, __u32 desired_access, | |
f0df737e PS |
838 | __u32 create_disposition, __u32 file_attributes, __u32 create_options, |
839 | struct smb2_file_all_info *buf) | |
2503a0db PS |
840 | { |
841 | struct smb2_create_req *req; | |
842 | struct smb2_create_rsp *rsp; | |
843 | struct TCP_Server_Info *server; | |
844 | struct cifs_ses *ses = tcon->ses; | |
845 | struct kvec iov[2]; | |
846 | int resp_buftype; | |
847 | int uni_path_len; | |
848 | int rc = 0; | |
849 | int num_iovecs = 2; | |
850 | ||
851 | cFYI(1, "create/open"); | |
852 | ||
853 | if (ses && (ses->server)) | |
854 | server = ses->server; | |
855 | else | |
856 | return -EIO; | |
857 | ||
858 | rc = small_smb2_init(SMB2_CREATE, tcon, (void **) &req); | |
859 | if (rc) | |
860 | return rc; | |
861 | ||
f0df737e | 862 | /* if (server->oplocks) |
2503a0db | 863 | req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_BATCH; |
f0df737e | 864 | else */ |
2503a0db PS |
865 | req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_NONE; |
866 | req->ImpersonationLevel = IL_IMPERSONATION; | |
867 | req->DesiredAccess = cpu_to_le32(desired_access); | |
868 | /* File attributes ignored on open (used in create though) */ | |
869 | req->FileAttributes = cpu_to_le32(file_attributes); | |
870 | req->ShareAccess = FILE_SHARE_ALL_LE; | |
871 | req->CreateDisposition = cpu_to_le32(create_disposition); | |
872 | req->CreateOptions = cpu_to_le32(create_options); | |
873 | uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2; | |
874 | req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req) | |
875 | - 1 /* pad */ - 4 /* do not count rfc1001 len field */); | |
876 | ||
877 | iov[0].iov_base = (char *)req; | |
878 | /* 4 for rfc1002 length field */ | |
879 | iov[0].iov_len = get_rfc1002_length(req) + 4; | |
880 | ||
881 | /* MUST set path len (NameLength) to 0 opening root of share */ | |
882 | if (uni_path_len >= 4) { | |
883 | req->NameLength = cpu_to_le16(uni_path_len - 2); | |
884 | /* -1 since last byte is buf[0] which is sent below (path) */ | |
885 | iov[0].iov_len--; | |
886 | iov[1].iov_len = uni_path_len; | |
887 | iov[1].iov_base = path; | |
888 | /* | |
889 | * -1 since last byte is buf[0] which was counted in | |
890 | * smb2_buf_len. | |
891 | */ | |
892 | inc_rfc1001_len(req, uni_path_len - 1); | |
893 | } else { | |
894 | num_iovecs = 1; | |
895 | req->NameLength = 0; | |
896 | } | |
897 | ||
898 | rc = SendReceive2(xid, ses, iov, num_iovecs, &resp_buftype, 0); | |
899 | rsp = (struct smb2_create_rsp *)iov[0].iov_base; | |
900 | ||
901 | if (rc != 0) { | |
902 | cifs_stats_fail_inc(tcon, SMB2_CREATE_HE); | |
903 | goto creat_exit; | |
904 | } | |
905 | ||
906 | if (rsp == NULL) { | |
907 | rc = -EIO; | |
908 | goto creat_exit; | |
909 | } | |
910 | *persistent_fid = rsp->PersistentFileId; | |
911 | *volatile_fid = rsp->VolatileFileId; | |
f0df737e PS |
912 | |
913 | if (buf) { | |
914 | memcpy(buf, &rsp->CreationTime, 32); | |
915 | buf->AllocationSize = rsp->AllocationSize; | |
916 | buf->EndOfFile = rsp->EndofFile; | |
917 | buf->Attributes = rsp->FileAttributes; | |
918 | buf->NumberOfLinks = cpu_to_le32(1); | |
919 | buf->DeletePending = 0; | |
920 | } | |
2503a0db PS |
921 | creat_exit: |
922 | free_rsp_buf(resp_buftype, rsp); | |
923 | return rc; | |
924 | } | |
925 | ||
926 | int | |
927 | SMB2_close(const unsigned int xid, struct cifs_tcon *tcon, | |
928 | u64 persistent_fid, u64 volatile_fid) | |
929 | { | |
930 | struct smb2_close_req *req; | |
931 | struct smb2_close_rsp *rsp; | |
932 | struct TCP_Server_Info *server; | |
933 | struct cifs_ses *ses = tcon->ses; | |
934 | struct kvec iov[1]; | |
935 | int resp_buftype; | |
936 | int rc = 0; | |
937 | ||
938 | cFYI(1, "Close"); | |
939 | ||
940 | if (ses && (ses->server)) | |
941 | server = ses->server; | |
942 | else | |
943 | return -EIO; | |
944 | ||
945 | rc = small_smb2_init(SMB2_CLOSE, tcon, (void **) &req); | |
946 | if (rc) | |
947 | return rc; | |
948 | ||
949 | req->PersistentFileId = persistent_fid; | |
950 | req->VolatileFileId = volatile_fid; | |
951 | ||
952 | iov[0].iov_base = (char *)req; | |
953 | /* 4 for rfc1002 length field */ | |
954 | iov[0].iov_len = get_rfc1002_length(req) + 4; | |
955 | ||
956 | rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0); | |
957 | rsp = (struct smb2_close_rsp *)iov[0].iov_base; | |
958 | ||
959 | if (rc != 0) { | |
960 | if (tcon) | |
961 | cifs_stats_fail_inc(tcon, SMB2_CLOSE_HE); | |
962 | goto close_exit; | |
963 | } | |
964 | ||
965 | if (rsp == NULL) { | |
966 | rc = -EIO; | |
967 | goto close_exit; | |
968 | } | |
969 | ||
970 | /* BB FIXME - decode close response, update inode for caching */ | |
971 | ||
972 | close_exit: | |
973 | free_rsp_buf(resp_buftype, rsp); | |
974 | return rc; | |
975 | } | |
be4cb9e3 PS |
976 | |
977 | static int | |
978 | validate_buf(unsigned int offset, unsigned int buffer_length, | |
979 | struct smb2_hdr *hdr, unsigned int min_buf_size) | |
980 | ||
981 | { | |
982 | unsigned int smb_len = be32_to_cpu(hdr->smb2_buf_length); | |
983 | char *end_of_smb = smb_len + 4 /* RFC1001 length field */ + (char *)hdr; | |
984 | char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr; | |
985 | char *end_of_buf = begin_of_buf + buffer_length; | |
986 | ||
987 | ||
988 | if (buffer_length < min_buf_size) { | |
989 | cERROR(1, "buffer length %d smaller than minimum size %d", | |
990 | buffer_length, min_buf_size); | |
991 | return -EINVAL; | |
992 | } | |
993 | ||
994 | /* check if beyond RFC1001 maximum length */ | |
995 | if ((smb_len > 0x7FFFFF) || (buffer_length > 0x7FFFFF)) { | |
996 | cERROR(1, "buffer length %d or smb length %d too large", | |
997 | buffer_length, smb_len); | |
998 | return -EINVAL; | |
999 | } | |
1000 | ||
1001 | if ((begin_of_buf > end_of_smb) || (end_of_buf > end_of_smb)) { | |
1002 | cERROR(1, "illegal server response, bad offset to data"); | |
1003 | return -EINVAL; | |
1004 | } | |
1005 | ||
1006 | return 0; | |
1007 | } | |
1008 | ||
1009 | /* | |
1010 | * If SMB buffer fields are valid, copy into temporary buffer to hold result. | |
1011 | * Caller must free buffer. | |
1012 | */ | |
1013 | static int | |
1014 | validate_and_copy_buf(unsigned int offset, unsigned int buffer_length, | |
1015 | struct smb2_hdr *hdr, unsigned int minbufsize, | |
1016 | char *data) | |
1017 | ||
1018 | { | |
1019 | char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr; | |
1020 | int rc; | |
1021 | ||
1022 | if (!data) | |
1023 | return -EINVAL; | |
1024 | ||
1025 | rc = validate_buf(offset, buffer_length, hdr, minbufsize); | |
1026 | if (rc) | |
1027 | return rc; | |
1028 | ||
1029 | memcpy(data, begin_of_buf, buffer_length); | |
1030 | ||
1031 | return 0; | |
1032 | } | |
1033 | ||
f0df737e PS |
1034 | static int |
1035 | query_info(const unsigned int xid, struct cifs_tcon *tcon, | |
1036 | u64 persistent_fid, u64 volatile_fid, u8 info_class, | |
1037 | size_t output_len, size_t min_len, void *data) | |
be4cb9e3 PS |
1038 | { |
1039 | struct smb2_query_info_req *req; | |
1040 | struct smb2_query_info_rsp *rsp = NULL; | |
1041 | struct kvec iov[2]; | |
1042 | int rc = 0; | |
1043 | int resp_buftype; | |
1044 | struct TCP_Server_Info *server; | |
1045 | struct cifs_ses *ses = tcon->ses; | |
1046 | ||
1047 | cFYI(1, "Query Info"); | |
1048 | ||
1049 | if (ses && (ses->server)) | |
1050 | server = ses->server; | |
1051 | else | |
1052 | return -EIO; | |
1053 | ||
1054 | rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req); | |
1055 | if (rc) | |
1056 | return rc; | |
1057 | ||
1058 | req->InfoType = SMB2_O_INFO_FILE; | |
f0df737e | 1059 | req->FileInfoClass = info_class; |
be4cb9e3 PS |
1060 | req->PersistentFileId = persistent_fid; |
1061 | req->VolatileFileId = volatile_fid; | |
1062 | /* 4 for rfc1002 length field and 1 for Buffer */ | |
1063 | req->InputBufferOffset = | |
1064 | cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4); | |
f0df737e | 1065 | req->OutputBufferLength = cpu_to_le32(output_len); |
be4cb9e3 PS |
1066 | |
1067 | iov[0].iov_base = (char *)req; | |
1068 | /* 4 for rfc1002 length field */ | |
1069 | iov[0].iov_len = get_rfc1002_length(req) + 4; | |
1070 | ||
1071 | rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0); | |
1072 | if (rc) { | |
1073 | cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE); | |
1074 | goto qinf_exit; | |
1075 | } | |
1076 | ||
1077 | rsp = (struct smb2_query_info_rsp *)iov[0].iov_base; | |
1078 | ||
1079 | rc = validate_and_copy_buf(le16_to_cpu(rsp->OutputBufferOffset), | |
1080 | le32_to_cpu(rsp->OutputBufferLength), | |
f0df737e | 1081 | &rsp->hdr, min_len, data); |
be4cb9e3 PS |
1082 | |
1083 | qinf_exit: | |
1084 | free_rsp_buf(resp_buftype, rsp); | |
1085 | return rc; | |
1086 | } | |
9094fad1 | 1087 | |
f0df737e PS |
1088 | int |
1089 | SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon, | |
1090 | u64 persistent_fid, u64 volatile_fid, | |
1091 | struct smb2_file_all_info *data) | |
1092 | { | |
1093 | return query_info(xid, tcon, persistent_fid, volatile_fid, | |
1094 | FILE_ALL_INFORMATION, | |
1095 | sizeof(struct smb2_file_all_info) + MAX_NAME * 2, | |
1096 | sizeof(struct smb2_file_all_info), data); | |
1097 | } | |
1098 | ||
1099 | int | |
1100 | SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon, | |
1101 | u64 persistent_fid, u64 volatile_fid, __le64 *uniqueid) | |
1102 | { | |
1103 | return query_info(xid, tcon, persistent_fid, volatile_fid, | |
1104 | FILE_INTERNAL_INFORMATION, | |
1105 | sizeof(struct smb2_file_internal_info), | |
1106 | sizeof(struct smb2_file_internal_info), uniqueid); | |
1107 | } | |
1108 | ||
9094fad1 PS |
1109 | /* |
1110 | * This is a no-op for now. We're not really interested in the reply, but | |
1111 | * rather in the fact that the server sent one and that server->lstrp | |
1112 | * gets updated. | |
1113 | * | |
1114 | * FIXME: maybe we should consider checking that the reply matches request? | |
1115 | */ | |
1116 | static void | |
1117 | smb2_echo_callback(struct mid_q_entry *mid) | |
1118 | { | |
1119 | struct TCP_Server_Info *server = mid->callback_data; | |
1120 | struct smb2_echo_rsp *smb2 = (struct smb2_echo_rsp *)mid->resp_buf; | |
1121 | unsigned int credits_received = 1; | |
1122 | ||
1123 | if (mid->mid_state == MID_RESPONSE_RECEIVED) | |
1124 | credits_received = le16_to_cpu(smb2->hdr.CreditRequest); | |
1125 | ||
1126 | DeleteMidQEntry(mid); | |
1127 | add_credits(server, credits_received, CIFS_ECHO_OP); | |
1128 | } | |
1129 | ||
1130 | int | |
1131 | SMB2_echo(struct TCP_Server_Info *server) | |
1132 | { | |
1133 | struct smb2_echo_req *req; | |
1134 | int rc = 0; | |
1135 | struct kvec iov; | |
1136 | ||
1137 | cFYI(1, "In echo request"); | |
1138 | ||
1139 | rc = small_smb2_init(SMB2_ECHO, NULL, (void **)&req); | |
1140 | if (rc) | |
1141 | return rc; | |
1142 | ||
1143 | req->hdr.CreditRequest = cpu_to_le16(1); | |
1144 | ||
1145 | iov.iov_base = (char *)req; | |
1146 | /* 4 for rfc1002 length field */ | |
1147 | iov.iov_len = get_rfc1002_length(req) + 4; | |
1148 | ||
1149 | rc = cifs_call_async(server, &iov, 1, NULL, smb2_echo_callback, server, | |
1150 | CIFS_ECHO_OP); | |
1151 | if (rc) | |
1152 | cFYI(1, "Echo request failed: %d", rc); | |
1153 | ||
1154 | cifs_small_buf_release(req); | |
1155 | return rc; | |
1156 | } | |
7a5cfb19 PS |
1157 | |
1158 | int | |
1159 | SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, | |
1160 | u64 volatile_fid) | |
1161 | { | |
1162 | struct smb2_flush_req *req; | |
1163 | struct TCP_Server_Info *server; | |
1164 | struct cifs_ses *ses = tcon->ses; | |
1165 | struct kvec iov[1]; | |
1166 | int resp_buftype; | |
1167 | int rc = 0; | |
1168 | ||
1169 | cFYI(1, "Flush"); | |
1170 | ||
1171 | if (ses && (ses->server)) | |
1172 | server = ses->server; | |
1173 | else | |
1174 | return -EIO; | |
1175 | ||
1176 | rc = small_smb2_init(SMB2_FLUSH, tcon, (void **) &req); | |
1177 | if (rc) | |
1178 | return rc; | |
1179 | ||
1180 | req->PersistentFileId = persistent_fid; | |
1181 | req->VolatileFileId = volatile_fid; | |
1182 | ||
1183 | iov[0].iov_base = (char *)req; | |
1184 | /* 4 for rfc1002 length field */ | |
1185 | iov[0].iov_len = get_rfc1002_length(req) + 4; | |
1186 | ||
1187 | rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0); | |
1188 | ||
1189 | if ((rc != 0) && tcon) | |
1190 | cifs_stats_fail_inc(tcon, SMB2_FLUSH_HE); | |
1191 | ||
1192 | free_rsp_buf(resp_buftype, iov[0].iov_base); | |
1193 | return rc; | |
1194 | } | |
09a4707e PS |
1195 | |
1196 | /* | |
1197 | * To form a chain of read requests, any read requests after the first should | |
1198 | * have the end_of_chain boolean set to true. | |
1199 | */ | |
1200 | static int | |
1201 | smb2_new_read_req(struct kvec *iov, struct cifs_io_parms *io_parms, | |
1202 | unsigned int remaining_bytes, int request_type) | |
1203 | { | |
1204 | int rc = -EACCES; | |
1205 | struct smb2_read_req *req = NULL; | |
1206 | ||
1207 | rc = small_smb2_init(SMB2_READ, io_parms->tcon, (void **) &req); | |
1208 | if (rc) | |
1209 | return rc; | |
1210 | if (io_parms->tcon->ses->server == NULL) | |
1211 | return -ECONNABORTED; | |
1212 | ||
1213 | req->hdr.ProcessId = cpu_to_le32(io_parms->pid); | |
1214 | ||
1215 | req->PersistentFileId = io_parms->persistent_fid; | |
1216 | req->VolatileFileId = io_parms->volatile_fid; | |
1217 | req->ReadChannelInfoOffset = 0; /* reserved */ | |
1218 | req->ReadChannelInfoLength = 0; /* reserved */ | |
1219 | req->Channel = 0; /* reserved */ | |
1220 | req->MinimumCount = 0; | |
1221 | req->Length = cpu_to_le32(io_parms->length); | |
1222 | req->Offset = cpu_to_le64(io_parms->offset); | |
1223 | ||
1224 | if (request_type & CHAINED_REQUEST) { | |
1225 | if (!(request_type & END_OF_CHAIN)) { | |
1226 | /* 4 for rfc1002 length field */ | |
1227 | req->hdr.NextCommand = | |
1228 | cpu_to_le32(get_rfc1002_length(req) + 4); | |
1229 | } else /* END_OF_CHAIN */ | |
1230 | req->hdr.NextCommand = 0; | |
1231 | if (request_type & RELATED_REQUEST) { | |
1232 | req->hdr.Flags |= SMB2_FLAGS_RELATED_OPERATIONS; | |
1233 | /* | |
1234 | * Related requests use info from previous read request | |
1235 | * in chain. | |
1236 | */ | |
1237 | req->hdr.SessionId = 0xFFFFFFFF; | |
1238 | req->hdr.TreeId = 0xFFFFFFFF; | |
1239 | req->PersistentFileId = 0xFFFFFFFF; | |
1240 | req->VolatileFileId = 0xFFFFFFFF; | |
1241 | } | |
1242 | } | |
1243 | if (remaining_bytes > io_parms->length) | |
1244 | req->RemainingBytes = cpu_to_le32(remaining_bytes); | |
1245 | else | |
1246 | req->RemainingBytes = 0; | |
1247 | ||
1248 | iov[0].iov_base = (char *)req; | |
1249 | /* 4 for rfc1002 length field */ | |
1250 | iov[0].iov_len = get_rfc1002_length(req) + 4; | |
1251 | return rc; | |
1252 | } | |
1253 | ||
1254 | static void | |
1255 | smb2_readv_callback(struct mid_q_entry *mid) | |
1256 | { | |
1257 | struct cifs_readdata *rdata = mid->callback_data; | |
1258 | struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink); | |
1259 | struct TCP_Server_Info *server = tcon->ses->server; | |
1260 | struct smb2_hdr *buf = (struct smb2_hdr *)rdata->iov[0].iov_base; | |
1261 | unsigned int credits_received = 1; | |
1262 | ||
1263 | cFYI(1, "%s: mid=%llu state=%d result=%d bytes=%u", __func__, | |
1264 | mid->mid, mid->mid_state, rdata->result, rdata->bytes); | |
1265 | ||
1266 | switch (mid->mid_state) { | |
1267 | case MID_RESPONSE_RECEIVED: | |
1268 | credits_received = le16_to_cpu(buf->CreditRequest); | |
1269 | /* result already set, check signature */ | |
1270 | /* if (server->sec_mode & | |
1271 | (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) | |
1272 | if (smb2_verify_signature(mid->resp_buf, server)) | |
1273 | cERROR(1, "Unexpected SMB signature"); */ | |
1274 | /* FIXME: should this be counted toward the initiating task? */ | |
1275 | task_io_account_read(rdata->bytes); | |
1276 | cifs_stats_bytes_read(tcon, rdata->bytes); | |
1277 | break; | |
1278 | case MID_REQUEST_SUBMITTED: | |
1279 | case MID_RETRY_NEEDED: | |
1280 | rdata->result = -EAGAIN; | |
1281 | break; | |
1282 | default: | |
1283 | if (rdata->result != -ENODATA) | |
1284 | rdata->result = -EIO; | |
1285 | } | |
1286 | ||
1287 | if (rdata->result) | |
1288 | cifs_stats_fail_inc(tcon, SMB2_READ_HE); | |
1289 | ||
1290 | queue_work(cifsiod_wq, &rdata->work); | |
1291 | DeleteMidQEntry(mid); | |
1292 | add_credits(server, credits_received, 0); | |
1293 | } | |
1294 | ||
1295 | /* smb2_async_readv - send an async write, and set up mid to handle result */ | |
1296 | int | |
1297 | smb2_async_readv(struct cifs_readdata *rdata) | |
1298 | { | |
1299 | int rc; | |
1300 | struct smb2_hdr *buf; | |
1301 | struct cifs_io_parms io_parms; | |
1302 | ||
1303 | cFYI(1, "%s: offset=%llu bytes=%u", __func__, | |
1304 | rdata->offset, rdata->bytes); | |
1305 | ||
1306 | io_parms.tcon = tlink_tcon(rdata->cfile->tlink); | |
1307 | io_parms.offset = rdata->offset; | |
1308 | io_parms.length = rdata->bytes; | |
1309 | io_parms.persistent_fid = rdata->cfile->fid.persistent_fid; | |
1310 | io_parms.volatile_fid = rdata->cfile->fid.volatile_fid; | |
1311 | io_parms.pid = rdata->pid; | |
1312 | rc = smb2_new_read_req(&rdata->iov[0], &io_parms, 0, 0); | |
1313 | if (rc) | |
1314 | return rc; | |
1315 | ||
1316 | buf = (struct smb2_hdr *)rdata->iov[0].iov_base; | |
1317 | /* 4 for rfc1002 length field */ | |
1318 | rdata->iov[0].iov_len = get_rfc1002_length(rdata->iov[0].iov_base) + 4; | |
1319 | ||
1320 | kref_get(&rdata->refcount); | |
1321 | rc = cifs_call_async(io_parms.tcon->ses->server, rdata->iov, 1, | |
1322 | cifs_readv_receive, smb2_readv_callback, | |
1323 | rdata, 0); | |
1324 | if (rc) | |
1325 | kref_put(&rdata->refcount, cifs_readdata_release); | |
1326 | ||
1327 | cifs_small_buf_release(buf); | |
1328 | return rc; | |
1329 | } |