Commit | Line | Data |
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ec2e4523 PS |
1 | /* |
2 | * fs/cifs/smb2pdu.c | |
3 | * | |
e4aa25e7 | 4 | * Copyright (C) International Business Machines Corp., 2009, 2012 |
ec2e4523 PS |
5 | * Etersoft, 2012 |
6 | * Author(s): Steve French (sfrench@us.ibm.com) | |
7 | * Pavel Shilovsky (pshilovsky@samba.org) 2012 | |
8 | * | |
9 | * Contains the routines for constructing the SMB2 PDUs themselves | |
10 | * | |
11 | * This library is free software; you can redistribute it and/or modify | |
12 | * it under the terms of the GNU Lesser General Public License as published | |
13 | * by the Free Software Foundation; either version 2.1 of the License, or | |
14 | * (at your option) any later version. | |
15 | * | |
16 | * This library is distributed in the hope that it will be useful, | |
17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See | |
19 | * the GNU Lesser General Public License for more details. | |
20 | * | |
21 | * You should have received a copy of the GNU Lesser General Public License | |
22 | * along with this library; if not, write to the Free Software | |
23 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
24 | */ | |
25 | ||
26 | /* SMB2 PDU handling routines here - except for leftovers (eg session setup) */ | |
27 | /* Note that there are handle based routines which must be */ | |
28 | /* treated slightly differently for reconnection purposes since we never */ | |
29 | /* want to reuse a stale file handle and only the caller knows the file info */ | |
30 | ||
31 | #include <linux/fs.h> | |
32 | #include <linux/kernel.h> | |
33 | #include <linux/vfs.h> | |
09a4707e | 34 | #include <linux/task_io_accounting_ops.h> |
ec2e4523 | 35 | #include <linux/uaccess.h> |
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)) { | |
f96637be JP |
158 | cifs_dbg(FYI, "can not send cmd %d while umounting\n", |
159 | smb2_command); | |
aa24d1e9 PS |
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) { | |
f96637be | 203 | cifs_dbg(FYI, "gave up waiting on reconnect in smb_init\n"); |
aa24d1e9 PS |
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); | |
f96637be | 230 | cifs_dbg(FYI, "reconnect tcon rc = %d\n", rc); |
aa24d1e9 PS |
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 | ||
ec2e4523 PS |
307 | |
308 | /* | |
309 | * | |
310 | * SMB2 Worker functions follow: | |
311 | * | |
312 | * The general structure of the worker functions is: | |
313 | * 1) Call smb2_init (assembles SMB2 header) | |
314 | * 2) Initialize SMB2 command specific fields in fixed length area of SMB | |
315 | * 3) Call smb_sendrcv2 (sends request on socket and waits for response) | |
316 | * 4) Decode SMB2 command specific fields in the fixed length area | |
317 | * 5) Decode variable length data area (if any for this SMB2 command type) | |
318 | * 6) Call free smb buffer | |
319 | * 7) return | |
320 | * | |
321 | */ | |
322 | ||
323 | int | |
324 | SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses) | |
325 | { | |
326 | struct smb2_negotiate_req *req; | |
327 | struct smb2_negotiate_rsp *rsp; | |
328 | struct kvec iov[1]; | |
329 | int rc = 0; | |
330 | int resp_buftype; | |
331 | struct TCP_Server_Info *server; | |
332 | unsigned int sec_flags; | |
ec2e4523 PS |
333 | u16 temp = 0; |
334 | int blob_offset, blob_length; | |
335 | char *security_blob; | |
336 | int flags = CIFS_NEG_OP; | |
337 | ||
f96637be | 338 | cifs_dbg(FYI, "Negotiate protocol\n"); |
ec2e4523 PS |
339 | |
340 | if (ses->server) | |
341 | server = ses->server; | |
342 | else { | |
343 | rc = -EIO; | |
344 | return rc; | |
345 | } | |
346 | ||
347 | rc = small_smb2_init(SMB2_NEGOTIATE, NULL, (void **) &req); | |
348 | if (rc) | |
349 | return rc; | |
350 | ||
351 | /* if any of auth flags (ie not sign or seal) are overriden use them */ | |
352 | if (ses->overrideSecFlg & (~(CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL))) | |
353 | sec_flags = ses->overrideSecFlg; /* BB FIXME fix sign flags?*/ | |
354 | else /* if override flags set only sign/seal OR them with global auth */ | |
355 | sec_flags = global_secflags | ses->overrideSecFlg; | |
356 | ||
f96637be | 357 | cifs_dbg(FYI, "sec_flags 0x%x\n", sec_flags); |
ec2e4523 PS |
358 | |
359 | req->hdr.SessionId = 0; | |
360 | ||
e4aa25e7 | 361 | req->Dialects[0] = cpu_to_le16(ses->server->vals->protocol_id); |
ec2e4523 | 362 | |
e4aa25e7 SF |
363 | req->DialectCount = cpu_to_le16(1); /* One vers= at a time for now */ |
364 | inc_rfc1001_len(req, 2); | |
ec2e4523 PS |
365 | |
366 | /* only one of SMB2 signing flags may be set in SMB2 request */ | |
367 | if ((sec_flags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN) | |
368 | temp = SMB2_NEGOTIATE_SIGNING_REQUIRED; | |
369 | else if (sec_flags & CIFSSEC_MAY_SIGN) /* MAY_SIGN is a single flag */ | |
370 | temp = SMB2_NEGOTIATE_SIGNING_ENABLED; | |
371 | ||
372 | req->SecurityMode = cpu_to_le16(temp); | |
373 | ||
e4aa25e7 | 374 | req->Capabilities = cpu_to_le32(ses->server->vals->req_capabilities); |
ec2e4523 | 375 | |
b8c32dbb PS |
376 | memcpy(req->ClientGUID, cifs_client_guid, SMB2_CLIENT_GUID_SIZE); |
377 | ||
ec2e4523 PS |
378 | iov[0].iov_base = (char *)req; |
379 | /* 4 for rfc1002 length field */ | |
380 | iov[0].iov_len = get_rfc1002_length(req) + 4; | |
381 | ||
382 | rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, flags); | |
383 | ||
384 | rsp = (struct smb2_negotiate_rsp *)iov[0].iov_base; | |
385 | /* | |
386 | * No tcon so can't do | |
387 | * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]); | |
388 | */ | |
389 | if (rc != 0) | |
390 | goto neg_exit; | |
391 | ||
f96637be | 392 | cifs_dbg(FYI, "mode 0x%x\n", rsp->SecurityMode); |
ec2e4523 | 393 | |
e4aa25e7 SF |
394 | /* BB we may eventually want to match the negotiated vs. requested |
395 | dialect, even though we are only requesting one at a time */ | |
396 | if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) | |
f96637be | 397 | cifs_dbg(FYI, "negotiated smb2.0 dialect\n"); |
e4aa25e7 | 398 | else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) |
f96637be | 399 | cifs_dbg(FYI, "negotiated smb2.1 dialect\n"); |
e4aa25e7 | 400 | else if (rsp->DialectRevision == cpu_to_le16(SMB30_PROT_ID)) |
f96637be | 401 | cifs_dbg(FYI, "negotiated smb3.0 dialect\n"); |
ec2e4523 | 402 | else { |
f96637be JP |
403 | cifs_dbg(VFS, "Illegal dialect returned by server %d\n", |
404 | le16_to_cpu(rsp->DialectRevision)); | |
ec2e4523 PS |
405 | rc = -EIO; |
406 | goto neg_exit; | |
407 | } | |
408 | server->dialect = le16_to_cpu(rsp->DialectRevision); | |
409 | ||
410 | server->maxBuf = le32_to_cpu(rsp->MaxTransactSize); | |
411 | server->max_read = le32_to_cpu(rsp->MaxReadSize); | |
412 | server->max_write = le32_to_cpu(rsp->MaxWriteSize); | |
413 | /* BB Do we need to validate the SecurityMode? */ | |
414 | server->sec_mode = le16_to_cpu(rsp->SecurityMode); | |
415 | server->capabilities = le32_to_cpu(rsp->Capabilities); | |
29e20f9c PS |
416 | /* Internal types */ |
417 | server->capabilities |= SMB2_NT_FIND | SMB2_LARGE_FILES; | |
ec2e4523 PS |
418 | |
419 | security_blob = smb2_get_data_area_len(&blob_offset, &blob_length, | |
420 | &rsp->hdr); | |
421 | if (blob_length == 0) { | |
f96637be | 422 | cifs_dbg(VFS, "missing security blob on negprot\n"); |
ec2e4523 PS |
423 | rc = -EIO; |
424 | goto neg_exit; | |
425 | } | |
3c1bf7e4 | 426 | |
f96637be | 427 | cifs_dbg(FYI, "sec_flags 0x%x\n", sec_flags); |
52c0f4ad | 428 | if ((sec_flags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN) { |
f96637be | 429 | cifs_dbg(FYI, "Signing required\n"); |
3c1bf7e4 PS |
430 | if (!(server->sec_mode & (SMB2_NEGOTIATE_SIGNING_REQUIRED | |
431 | SMB2_NEGOTIATE_SIGNING_ENABLED))) { | |
f96637be | 432 | cifs_dbg(VFS, "signing required but server lacks support\n"); |
3c1bf7e4 PS |
433 | rc = -EOPNOTSUPP; |
434 | goto neg_exit; | |
435 | } | |
436 | server->sec_mode |= SECMODE_SIGN_REQUIRED; | |
437 | } else if (sec_flags & CIFSSEC_MAY_SIGN) { | |
f96637be | 438 | cifs_dbg(FYI, "Signing optional\n"); |
3c1bf7e4 | 439 | if (server->sec_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED) { |
f96637be | 440 | cifs_dbg(FYI, "Server requires signing\n"); |
3c1bf7e4 PS |
441 | server->sec_mode |= SECMODE_SIGN_REQUIRED; |
442 | } else { | |
443 | server->sec_mode &= | |
444 | ~(SECMODE_SIGN_ENABLED | SECMODE_SIGN_REQUIRED); | |
445 | } | |
446 | } else { | |
f96637be | 447 | cifs_dbg(FYI, "Signing disabled\n"); |
3c1bf7e4 | 448 | if (server->sec_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED) { |
f96637be | 449 | cifs_dbg(VFS, "Server requires packet signing to be enabled in /proc/fs/cifs/SecurityFlags\n"); |
3c1bf7e4 PS |
450 | rc = -EOPNOTSUPP; |
451 | goto neg_exit; | |
452 | } | |
453 | server->sec_mode &= | |
454 | ~(SECMODE_SIGN_ENABLED | SECMODE_SIGN_REQUIRED); | |
455 | } | |
456 | ||
ec2e4523 PS |
457 | #ifdef CONFIG_SMB2_ASN1 /* BB REMOVEME when updated asn1.c ready */ |
458 | rc = decode_neg_token_init(security_blob, blob_length, | |
459 | &server->sec_type); | |
460 | if (rc == 1) | |
461 | rc = 0; | |
462 | else if (rc == 0) { | |
463 | rc = -EIO; | |
464 | goto neg_exit; | |
465 | } | |
466 | #endif | |
467 | ||
468 | neg_exit: | |
469 | free_rsp_buf(resp_buftype, rsp); | |
470 | return rc; | |
471 | } | |
5478f9ba PS |
472 | |
473 | int | |
474 | SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses, | |
475 | const struct nls_table *nls_cp) | |
476 | { | |
477 | struct smb2_sess_setup_req *req; | |
478 | struct smb2_sess_setup_rsp *rsp = NULL; | |
479 | struct kvec iov[2]; | |
480 | int rc = 0; | |
481 | int resp_buftype; | |
482 | __le32 phase = NtLmNegotiate; /* NTLMSSP, if needed, is multistage */ | |
483 | struct TCP_Server_Info *server; | |
484 | unsigned int sec_flags; | |
485 | u8 temp = 0; | |
486 | u16 blob_length = 0; | |
487 | char *security_blob; | |
488 | char *ntlmssp_blob = NULL; | |
489 | bool use_spnego = false; /* else use raw ntlmssp */ | |
490 | ||
f96637be | 491 | cifs_dbg(FYI, "Session Setup\n"); |
5478f9ba PS |
492 | |
493 | if (ses->server) | |
494 | server = ses->server; | |
495 | else { | |
496 | rc = -EIO; | |
497 | return rc; | |
498 | } | |
499 | ||
500 | /* | |
501 | * If memory allocation is successful, caller of this function | |
502 | * frees it. | |
503 | */ | |
504 | ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL); | |
505 | if (!ses->ntlmssp) | |
506 | return -ENOMEM; | |
507 | ||
508 | ses->server->secType = RawNTLMSSP; | |
509 | ||
510 | ssetup_ntlmssp_authenticate: | |
511 | if (phase == NtLmChallenge) | |
512 | phase = NtLmAuthenticate; /* if ntlmssp, now final phase */ | |
513 | ||
514 | rc = small_smb2_init(SMB2_SESSION_SETUP, NULL, (void **) &req); | |
515 | if (rc) | |
516 | return rc; | |
517 | ||
518 | /* if any of auth flags (ie not sign or seal) are overriden use them */ | |
519 | if (ses->overrideSecFlg & (~(CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL))) | |
520 | sec_flags = ses->overrideSecFlg; /* BB FIXME fix sign flags?*/ | |
521 | else /* if override flags set only sign/seal OR them with global auth */ | |
522 | sec_flags = global_secflags | ses->overrideSecFlg; | |
523 | ||
f96637be | 524 | cifs_dbg(FYI, "sec_flags 0x%x\n", sec_flags); |
5478f9ba PS |
525 | |
526 | req->hdr.SessionId = 0; /* First session, not a reauthenticate */ | |
527 | req->VcNumber = 0; /* MBZ */ | |
528 | /* to enable echos and oplocks */ | |
529 | req->hdr.CreditRequest = cpu_to_le16(3); | |
530 | ||
531 | /* only one of SMB2 signing flags may be set in SMB2 request */ | |
532 | if ((sec_flags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN) | |
533 | temp = SMB2_NEGOTIATE_SIGNING_REQUIRED; | |
534 | else if (ses->server->sec_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED) | |
535 | temp = SMB2_NEGOTIATE_SIGNING_REQUIRED; | |
536 | else if (sec_flags & CIFSSEC_MAY_SIGN) /* MAY_SIGN is a single flag */ | |
537 | temp = SMB2_NEGOTIATE_SIGNING_ENABLED; | |
538 | ||
539 | req->SecurityMode = temp; | |
540 | req->Capabilities = 0; | |
541 | req->Channel = 0; /* MBZ */ | |
542 | ||
543 | iov[0].iov_base = (char *)req; | |
544 | /* 4 for rfc1002 length field and 1 for pad */ | |
545 | iov[0].iov_len = get_rfc1002_length(req) + 4 - 1; | |
546 | if (phase == NtLmNegotiate) { | |
547 | ntlmssp_blob = kmalloc(sizeof(struct _NEGOTIATE_MESSAGE), | |
548 | GFP_KERNEL); | |
549 | if (ntlmssp_blob == NULL) { | |
550 | rc = -ENOMEM; | |
551 | goto ssetup_exit; | |
552 | } | |
553 | build_ntlmssp_negotiate_blob(ntlmssp_blob, ses); | |
554 | if (use_spnego) { | |
555 | /* blob_length = build_spnego_ntlmssp_blob( | |
556 | &security_blob, | |
557 | sizeof(struct _NEGOTIATE_MESSAGE), | |
558 | ntlmssp_blob); */ | |
559 | /* BB eventually need to add this */ | |
f96637be | 560 | cifs_dbg(VFS, "spnego not supported for SMB2 yet\n"); |
5478f9ba PS |
561 | rc = -EOPNOTSUPP; |
562 | kfree(ntlmssp_blob); | |
563 | goto ssetup_exit; | |
564 | } else { | |
565 | blob_length = sizeof(struct _NEGOTIATE_MESSAGE); | |
566 | /* with raw NTLMSSP we don't encapsulate in SPNEGO */ | |
567 | security_blob = ntlmssp_blob; | |
568 | } | |
569 | } else if (phase == NtLmAuthenticate) { | |
570 | req->hdr.SessionId = ses->Suid; | |
571 | ntlmssp_blob = kzalloc(sizeof(struct _NEGOTIATE_MESSAGE) + 500, | |
572 | GFP_KERNEL); | |
573 | if (ntlmssp_blob == NULL) { | |
5478f9ba PS |
574 | rc = -ENOMEM; |
575 | goto ssetup_exit; | |
576 | } | |
577 | rc = build_ntlmssp_auth_blob(ntlmssp_blob, &blob_length, ses, | |
578 | nls_cp); | |
579 | if (rc) { | |
f96637be JP |
580 | cifs_dbg(FYI, "build_ntlmssp_auth_blob failed %d\n", |
581 | rc); | |
5478f9ba PS |
582 | goto ssetup_exit; /* BB double check error handling */ |
583 | } | |
584 | if (use_spnego) { | |
585 | /* blob_length = build_spnego_ntlmssp_blob( | |
586 | &security_blob, | |
587 | blob_length, | |
588 | ntlmssp_blob); */ | |
f96637be | 589 | cifs_dbg(VFS, "spnego not supported for SMB2 yet\n"); |
5478f9ba PS |
590 | rc = -EOPNOTSUPP; |
591 | kfree(ntlmssp_blob); | |
592 | goto ssetup_exit; | |
593 | } else { | |
594 | security_blob = ntlmssp_blob; | |
595 | } | |
596 | } else { | |
f96637be | 597 | cifs_dbg(VFS, "illegal ntlmssp phase\n"); |
5478f9ba PS |
598 | rc = -EIO; |
599 | goto ssetup_exit; | |
600 | } | |
601 | ||
602 | /* Testing shows that buffer offset must be at location of Buffer[0] */ | |
603 | req->SecurityBufferOffset = | |
604 | cpu_to_le16(sizeof(struct smb2_sess_setup_req) - | |
605 | 1 /* pad */ - 4 /* rfc1001 len */); | |
606 | req->SecurityBufferLength = cpu_to_le16(blob_length); | |
607 | iov[1].iov_base = security_blob; | |
608 | iov[1].iov_len = blob_length; | |
609 | ||
610 | inc_rfc1001_len(req, blob_length - 1 /* pad */); | |
611 | ||
612 | /* BB add code to build os and lm fields */ | |
613 | ||
6d8b59d7 SF |
614 | rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, |
615 | CIFS_LOG_ERROR | CIFS_NEG_OP); | |
5478f9ba PS |
616 | |
617 | kfree(security_blob); | |
618 | rsp = (struct smb2_sess_setup_rsp *)iov[0].iov_base; | |
4ca3a99c PS |
619 | if (resp_buftype != CIFS_NO_BUFFER && |
620 | rsp->hdr.Status == STATUS_MORE_PROCESSING_REQUIRED) { | |
5478f9ba | 621 | if (phase != NtLmNegotiate) { |
f96637be | 622 | cifs_dbg(VFS, "Unexpected more processing error\n"); |
5478f9ba PS |
623 | goto ssetup_exit; |
624 | } | |
625 | if (offsetof(struct smb2_sess_setup_rsp, Buffer) - 4 != | |
4ca3a99c | 626 | le16_to_cpu(rsp->SecurityBufferOffset)) { |
f96637be JP |
627 | cifs_dbg(VFS, "Invalid security buffer offset %d\n", |
628 | le16_to_cpu(rsp->SecurityBufferOffset)); | |
5478f9ba PS |
629 | rc = -EIO; |
630 | goto ssetup_exit; | |
631 | } | |
632 | ||
633 | /* NTLMSSP Negotiate sent now processing challenge (response) */ | |
634 | phase = NtLmChallenge; /* process ntlmssp challenge */ | |
635 | rc = 0; /* MORE_PROCESSING is not an error here but expected */ | |
636 | ses->Suid = rsp->hdr.SessionId; | |
637 | rc = decode_ntlmssp_challenge(rsp->Buffer, | |
638 | le16_to_cpu(rsp->SecurityBufferLength), ses); | |
639 | } | |
640 | ||
641 | /* | |
642 | * BB eventually add code for SPNEGO decoding of NtlmChallenge blob, | |
643 | * but at least the raw NTLMSSP case works. | |
644 | */ | |
645 | /* | |
646 | * No tcon so can't do | |
647 | * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]); | |
648 | */ | |
649 | if (rc != 0) | |
650 | goto ssetup_exit; | |
651 | ||
5478f9ba PS |
652 | ses->session_flags = le16_to_cpu(rsp->SessionFlags); |
653 | ssetup_exit: | |
654 | free_rsp_buf(resp_buftype, rsp); | |
655 | ||
656 | /* if ntlmssp, and negotiate succeeded, proceed to authenticate phase */ | |
657 | if ((phase == NtLmChallenge) && (rc == 0)) | |
658 | goto ssetup_ntlmssp_authenticate; | |
659 | return rc; | |
660 | } | |
661 | ||
662 | int | |
663 | SMB2_logoff(const unsigned int xid, struct cifs_ses *ses) | |
664 | { | |
665 | struct smb2_logoff_req *req; /* response is also trivial struct */ | |
666 | int rc = 0; | |
667 | struct TCP_Server_Info *server; | |
668 | ||
f96637be | 669 | cifs_dbg(FYI, "disconnect session %p\n", ses); |
5478f9ba PS |
670 | |
671 | if (ses && (ses->server)) | |
672 | server = ses->server; | |
673 | else | |
674 | return -EIO; | |
675 | ||
676 | rc = small_smb2_init(SMB2_LOGOFF, NULL, (void **) &req); | |
677 | if (rc) | |
678 | return rc; | |
679 | ||
680 | /* since no tcon, smb2_init can not do this, so do here */ | |
681 | req->hdr.SessionId = ses->Suid; | |
3c1bf7e4 PS |
682 | if (server->sec_mode & SECMODE_SIGN_REQUIRED) |
683 | req->hdr.Flags |= SMB2_FLAGS_SIGNED; | |
5478f9ba PS |
684 | |
685 | rc = SendReceiveNoRsp(xid, ses, (char *) &req->hdr, 0); | |
686 | /* | |
687 | * No tcon so can't do | |
688 | * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]); | |
689 | */ | |
690 | return rc; | |
691 | } | |
faaf946a PS |
692 | |
693 | static inline void cifs_stats_fail_inc(struct cifs_tcon *tcon, uint16_t code) | |
694 | { | |
d60622eb | 695 | cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_failed[code]); |
faaf946a PS |
696 | } |
697 | ||
698 | #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */) | |
699 | ||
700 | int | |
701 | SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree, | |
702 | struct cifs_tcon *tcon, const struct nls_table *cp) | |
703 | { | |
704 | struct smb2_tree_connect_req *req; | |
705 | struct smb2_tree_connect_rsp *rsp = NULL; | |
706 | struct kvec iov[2]; | |
707 | int rc = 0; | |
708 | int resp_buftype; | |
709 | int unc_path_len; | |
710 | struct TCP_Server_Info *server; | |
711 | __le16 *unc_path = NULL; | |
712 | ||
f96637be | 713 | cifs_dbg(FYI, "TCON\n"); |
faaf946a PS |
714 | |
715 | if ((ses->server) && tree) | |
716 | server = ses->server; | |
717 | else | |
718 | return -EIO; | |
719 | ||
720 | if (tcon && tcon->bad_network_name) | |
721 | return -ENOENT; | |
722 | ||
723 | unc_path = kmalloc(MAX_SHARENAME_LENGTH * 2, GFP_KERNEL); | |
724 | if (unc_path == NULL) | |
725 | return -ENOMEM; | |
726 | ||
727 | unc_path_len = cifs_strtoUTF16(unc_path, tree, strlen(tree), cp) + 1; | |
728 | unc_path_len *= 2; | |
729 | if (unc_path_len < 2) { | |
730 | kfree(unc_path); | |
731 | return -EINVAL; | |
732 | } | |
733 | ||
734 | rc = small_smb2_init(SMB2_TREE_CONNECT, tcon, (void **) &req); | |
735 | if (rc) { | |
736 | kfree(unc_path); | |
737 | return rc; | |
738 | } | |
739 | ||
740 | if (tcon == NULL) { | |
741 | /* since no tcon, smb2_init can not do this, so do here */ | |
742 | req->hdr.SessionId = ses->Suid; | |
743 | /* if (ses->server->sec_mode & SECMODE_SIGN_REQUIRED) | |
744 | req->hdr.Flags |= SMB2_FLAGS_SIGNED; */ | |
745 | } | |
746 | ||
747 | iov[0].iov_base = (char *)req; | |
748 | /* 4 for rfc1002 length field and 1 for pad */ | |
749 | iov[0].iov_len = get_rfc1002_length(req) + 4 - 1; | |
750 | ||
751 | /* Testing shows that buffer offset must be at location of Buffer[0] */ | |
752 | req->PathOffset = cpu_to_le16(sizeof(struct smb2_tree_connect_req) | |
753 | - 1 /* pad */ - 4 /* do not count rfc1001 len field */); | |
754 | req->PathLength = cpu_to_le16(unc_path_len - 2); | |
755 | iov[1].iov_base = unc_path; | |
756 | iov[1].iov_len = unc_path_len; | |
757 | ||
758 | inc_rfc1001_len(req, unc_path_len - 1 /* pad */); | |
759 | ||
760 | rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, 0); | |
761 | rsp = (struct smb2_tree_connect_rsp *)iov[0].iov_base; | |
762 | ||
763 | if (rc != 0) { | |
764 | if (tcon) { | |
765 | cifs_stats_fail_inc(tcon, SMB2_TREE_CONNECT_HE); | |
766 | tcon->need_reconnect = true; | |
767 | } | |
768 | goto tcon_error_exit; | |
769 | } | |
770 | ||
faaf946a PS |
771 | if (tcon == NULL) { |
772 | ses->ipc_tid = rsp->hdr.TreeId; | |
773 | goto tcon_exit; | |
774 | } | |
775 | ||
776 | if (rsp->ShareType & SMB2_SHARE_TYPE_DISK) | |
f96637be | 777 | cifs_dbg(FYI, "connection to disk share\n"); |
faaf946a PS |
778 | else if (rsp->ShareType & SMB2_SHARE_TYPE_PIPE) { |
779 | tcon->ipc = true; | |
f96637be | 780 | cifs_dbg(FYI, "connection to pipe share\n"); |
faaf946a PS |
781 | } else if (rsp->ShareType & SMB2_SHARE_TYPE_PRINT) { |
782 | tcon->print = true; | |
f96637be | 783 | cifs_dbg(FYI, "connection to printer\n"); |
faaf946a | 784 | } else { |
f96637be | 785 | cifs_dbg(VFS, "unknown share type %d\n", rsp->ShareType); |
faaf946a PS |
786 | rc = -EOPNOTSUPP; |
787 | goto tcon_error_exit; | |
788 | } | |
789 | ||
790 | tcon->share_flags = le32_to_cpu(rsp->ShareFlags); | |
791 | tcon->maximal_access = le32_to_cpu(rsp->MaximalAccess); | |
792 | tcon->tidStatus = CifsGood; | |
793 | tcon->need_reconnect = false; | |
794 | tcon->tid = rsp->hdr.TreeId; | |
795 | strncpy(tcon->treeName, tree, MAX_TREE_SIZE); | |
796 | ||
797 | if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) && | |
798 | ((tcon->share_flags & SHI1005_FLAGS_DFS) == 0)) | |
f96637be | 799 | cifs_dbg(VFS, "DFS capability contradicts DFS flag\n"); |
faaf946a PS |
800 | |
801 | tcon_exit: | |
802 | free_rsp_buf(resp_buftype, rsp); | |
803 | kfree(unc_path); | |
804 | return rc; | |
805 | ||
806 | tcon_error_exit: | |
807 | if (rsp->hdr.Status == STATUS_BAD_NETWORK_NAME) { | |
f96637be | 808 | cifs_dbg(VFS, "BAD_NETWORK_NAME: %s\n", tree); |
faaf946a PS |
809 | tcon->bad_network_name = true; |
810 | } | |
811 | goto tcon_exit; | |
812 | } | |
813 | ||
814 | int | |
815 | SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon) | |
816 | { | |
817 | struct smb2_tree_disconnect_req *req; /* response is trivial */ | |
818 | int rc = 0; | |
819 | struct TCP_Server_Info *server; | |
820 | struct cifs_ses *ses = tcon->ses; | |
821 | ||
f96637be | 822 | cifs_dbg(FYI, "Tree Disconnect\n"); |
faaf946a PS |
823 | |
824 | if (ses && (ses->server)) | |
825 | server = ses->server; | |
826 | else | |
827 | return -EIO; | |
828 | ||
829 | if ((tcon->need_reconnect) || (tcon->ses->need_reconnect)) | |
830 | return 0; | |
831 | ||
832 | rc = small_smb2_init(SMB2_TREE_DISCONNECT, tcon, (void **) &req); | |
833 | if (rc) | |
834 | return rc; | |
835 | ||
836 | rc = SendReceiveNoRsp(xid, ses, (char *)&req->hdr, 0); | |
837 | if (rc) | |
838 | cifs_stats_fail_inc(tcon, SMB2_TREE_DISCONNECT_HE); | |
839 | ||
840 | return rc; | |
841 | } | |
2503a0db | 842 | |
b8c32dbb PS |
843 | static struct create_lease * |
844 | create_lease_buf(u8 *lease_key, u8 oplock) | |
845 | { | |
846 | struct create_lease *buf; | |
847 | ||
d455b72b | 848 | buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL); |
b8c32dbb PS |
849 | if (!buf) |
850 | return NULL; | |
851 | ||
b8c32dbb PS |
852 | buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key)); |
853 | buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8))); | |
854 | if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) | |
855 | buf->lcontext.LeaseState = SMB2_LEASE_WRITE_CACHING | | |
856 | SMB2_LEASE_READ_CACHING; | |
857 | else if (oplock == SMB2_OPLOCK_LEVEL_II) | |
858 | buf->lcontext.LeaseState = SMB2_LEASE_READ_CACHING; | |
859 | else if (oplock == SMB2_OPLOCK_LEVEL_BATCH) | |
860 | buf->lcontext.LeaseState = SMB2_LEASE_HANDLE_CACHING | | |
861 | SMB2_LEASE_READ_CACHING | | |
862 | SMB2_LEASE_WRITE_CACHING; | |
863 | ||
864 | buf->ccontext.DataOffset = cpu_to_le16(offsetof | |
865 | (struct create_lease, lcontext)); | |
866 | buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context)); | |
867 | buf->ccontext.NameOffset = cpu_to_le16(offsetof | |
868 | (struct create_lease, Name)); | |
869 | buf->ccontext.NameLength = cpu_to_le16(4); | |
870 | buf->Name[0] = 'R'; | |
871 | buf->Name[1] = 'q'; | |
872 | buf->Name[2] = 'L'; | |
873 | buf->Name[3] = 's'; | |
874 | return buf; | |
875 | } | |
876 | ||
877 | static __u8 | |
878 | parse_lease_state(struct smb2_create_rsp *rsp) | |
879 | { | |
880 | char *data_offset; | |
881 | struct create_lease *lc; | |
b8c32dbb PS |
882 | bool found = false; |
883 | ||
884 | data_offset = (char *)rsp; | |
885 | data_offset += 4 + le32_to_cpu(rsp->CreateContextsOffset); | |
886 | lc = (struct create_lease *)data_offset; | |
887 | do { | |
888 | char *name = le16_to_cpu(lc->ccontext.NameOffset) + (char *)lc; | |
889 | if (le16_to_cpu(lc->ccontext.NameLength) != 4 || | |
890 | strncmp(name, "RqLs", 4)) { | |
891 | lc = (struct create_lease *)((char *)lc | |
892 | + le32_to_cpu(lc->ccontext.Next)); | |
893 | continue; | |
894 | } | |
895 | if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS) | |
896 | return SMB2_OPLOCK_LEVEL_NOCHANGE; | |
897 | found = true; | |
898 | break; | |
899 | } while (le32_to_cpu(lc->ccontext.Next) != 0); | |
900 | ||
901 | if (!found) | |
0822f514 | 902 | return 0; |
b8c32dbb | 903 | |
0822f514 | 904 | return smb2_map_lease_to_oplock(lc->lcontext.LeaseState); |
b8c32dbb PS |
905 | } |
906 | ||
2503a0db PS |
907 | int |
908 | SMB2_open(const unsigned int xid, struct cifs_tcon *tcon, __le16 *path, | |
909 | u64 *persistent_fid, u64 *volatile_fid, __u32 desired_access, | |
f0df737e | 910 | __u32 create_disposition, __u32 file_attributes, __u32 create_options, |
2e44b288 | 911 | __u8 *oplock, struct smb2_file_all_info *buf) |
2503a0db PS |
912 | { |
913 | struct smb2_create_req *req; | |
914 | struct smb2_create_rsp *rsp; | |
915 | struct TCP_Server_Info *server; | |
916 | struct cifs_ses *ses = tcon->ses; | |
b8c32dbb | 917 | struct kvec iov[3]; |
2503a0db PS |
918 | int resp_buftype; |
919 | int uni_path_len; | |
b8c32dbb PS |
920 | __le16 *copy_path = NULL; |
921 | int copy_size; | |
2503a0db PS |
922 | int rc = 0; |
923 | int num_iovecs = 2; | |
924 | ||
f96637be | 925 | cifs_dbg(FYI, "create/open\n"); |
2503a0db PS |
926 | |
927 | if (ses && (ses->server)) | |
928 | server = ses->server; | |
929 | else | |
930 | return -EIO; | |
931 | ||
932 | rc = small_smb2_init(SMB2_CREATE, tcon, (void **) &req); | |
933 | if (rc) | |
934 | return rc; | |
935 | ||
2503a0db PS |
936 | req->ImpersonationLevel = IL_IMPERSONATION; |
937 | req->DesiredAccess = cpu_to_le32(desired_access); | |
938 | /* File attributes ignored on open (used in create though) */ | |
939 | req->FileAttributes = cpu_to_le32(file_attributes); | |
940 | req->ShareAccess = FILE_SHARE_ALL_LE; | |
941 | req->CreateDisposition = cpu_to_le32(create_disposition); | |
942 | req->CreateOptions = cpu_to_le32(create_options); | |
943 | uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2; | |
944 | req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req) | |
b8c32dbb | 945 | - 8 /* pad */ - 4 /* do not count rfc1001 len field */); |
2503a0db PS |
946 | |
947 | iov[0].iov_base = (char *)req; | |
948 | /* 4 for rfc1002 length field */ | |
949 | iov[0].iov_len = get_rfc1002_length(req) + 4; | |
950 | ||
951 | /* MUST set path len (NameLength) to 0 opening root of share */ | |
952 | if (uni_path_len >= 4) { | |
953 | req->NameLength = cpu_to_le16(uni_path_len - 2); | |
954 | /* -1 since last byte is buf[0] which is sent below (path) */ | |
955 | iov[0].iov_len--; | |
b8c32dbb PS |
956 | if (uni_path_len % 8 != 0) { |
957 | copy_size = uni_path_len / 8 * 8; | |
958 | if (copy_size < uni_path_len) | |
959 | copy_size += 8; | |
960 | ||
961 | copy_path = kzalloc(copy_size, GFP_KERNEL); | |
962 | if (!copy_path) | |
963 | return -ENOMEM; | |
964 | memcpy((char *)copy_path, (const char *)path, | |
965 | uni_path_len); | |
966 | uni_path_len = copy_size; | |
967 | path = copy_path; | |
968 | } | |
969 | ||
2503a0db PS |
970 | iov[1].iov_len = uni_path_len; |
971 | iov[1].iov_base = path; | |
972 | /* | |
973 | * -1 since last byte is buf[0] which was counted in | |
974 | * smb2_buf_len. | |
975 | */ | |
976 | inc_rfc1001_len(req, uni_path_len - 1); | |
977 | } else { | |
b8c32dbb PS |
978 | iov[0].iov_len += 7; |
979 | req->hdr.smb2_buf_length = cpu_to_be32(be32_to_cpu( | |
980 | req->hdr.smb2_buf_length) + 8 - 1); | |
2503a0db PS |
981 | num_iovecs = 1; |
982 | req->NameLength = 0; | |
983 | } | |
984 | ||
b8c32dbb PS |
985 | if (!server->oplocks) |
986 | *oplock = SMB2_OPLOCK_LEVEL_NONE; | |
987 | ||
988 | if (!(tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING) || | |
989 | *oplock == SMB2_OPLOCK_LEVEL_NONE) | |
990 | req->RequestedOplockLevel = *oplock; | |
991 | else { | |
992 | iov[num_iovecs].iov_base = create_lease_buf(oplock+1, *oplock); | |
993 | if (iov[num_iovecs].iov_base == NULL) { | |
994 | cifs_small_buf_release(req); | |
995 | kfree(copy_path); | |
996 | return -ENOMEM; | |
997 | } | |
998 | iov[num_iovecs].iov_len = sizeof(struct create_lease); | |
999 | req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_LEASE; | |
1000 | req->CreateContextsOffset = cpu_to_le32( | |
1001 | sizeof(struct smb2_create_req) - 4 - 8 + | |
1002 | iov[num_iovecs-1].iov_len); | |
1003 | req->CreateContextsLength = cpu_to_le32( | |
1004 | sizeof(struct create_lease)); | |
1005 | inc_rfc1001_len(&req->hdr, sizeof(struct create_lease)); | |
1006 | num_iovecs++; | |
1007 | } | |
1008 | ||
2503a0db PS |
1009 | rc = SendReceive2(xid, ses, iov, num_iovecs, &resp_buftype, 0); |
1010 | rsp = (struct smb2_create_rsp *)iov[0].iov_base; | |
1011 | ||
1012 | if (rc != 0) { | |
1013 | cifs_stats_fail_inc(tcon, SMB2_CREATE_HE); | |
1014 | goto creat_exit; | |
1015 | } | |
1016 | ||
2503a0db PS |
1017 | *persistent_fid = rsp->PersistentFileId; |
1018 | *volatile_fid = rsp->VolatileFileId; | |
f0df737e PS |
1019 | |
1020 | if (buf) { | |
1021 | memcpy(buf, &rsp->CreationTime, 32); | |
1022 | buf->AllocationSize = rsp->AllocationSize; | |
1023 | buf->EndOfFile = rsp->EndofFile; | |
1024 | buf->Attributes = rsp->FileAttributes; | |
1025 | buf->NumberOfLinks = cpu_to_le32(1); | |
1026 | buf->DeletePending = 0; | |
1027 | } | |
2e44b288 | 1028 | |
b8c32dbb PS |
1029 | if (rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE) |
1030 | *oplock = parse_lease_state(rsp); | |
1031 | else | |
1032 | *oplock = rsp->OplockLevel; | |
2503a0db | 1033 | creat_exit: |
b8c32dbb | 1034 | kfree(copy_path); |
2503a0db PS |
1035 | free_rsp_buf(resp_buftype, rsp); |
1036 | return rc; | |
1037 | } | |
1038 | ||
1039 | int | |
1040 | SMB2_close(const unsigned int xid, struct cifs_tcon *tcon, | |
1041 | u64 persistent_fid, u64 volatile_fid) | |
1042 | { | |
1043 | struct smb2_close_req *req; | |
1044 | struct smb2_close_rsp *rsp; | |
1045 | struct TCP_Server_Info *server; | |
1046 | struct cifs_ses *ses = tcon->ses; | |
1047 | struct kvec iov[1]; | |
1048 | int resp_buftype; | |
1049 | int rc = 0; | |
1050 | ||
f96637be | 1051 | cifs_dbg(FYI, "Close\n"); |
2503a0db PS |
1052 | |
1053 | if (ses && (ses->server)) | |
1054 | server = ses->server; | |
1055 | else | |
1056 | return -EIO; | |
1057 | ||
1058 | rc = small_smb2_init(SMB2_CLOSE, tcon, (void **) &req); | |
1059 | if (rc) | |
1060 | return rc; | |
1061 | ||
1062 | req->PersistentFileId = persistent_fid; | |
1063 | req->VolatileFileId = volatile_fid; | |
1064 | ||
1065 | iov[0].iov_base = (char *)req; | |
1066 | /* 4 for rfc1002 length field */ | |
1067 | iov[0].iov_len = get_rfc1002_length(req) + 4; | |
1068 | ||
1069 | rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0); | |
1070 | rsp = (struct smb2_close_rsp *)iov[0].iov_base; | |
1071 | ||
1072 | if (rc != 0) { | |
1073 | if (tcon) | |
1074 | cifs_stats_fail_inc(tcon, SMB2_CLOSE_HE); | |
1075 | goto close_exit; | |
1076 | } | |
1077 | ||
2503a0db PS |
1078 | /* BB FIXME - decode close response, update inode for caching */ |
1079 | ||
1080 | close_exit: | |
1081 | free_rsp_buf(resp_buftype, rsp); | |
1082 | return rc; | |
1083 | } | |
be4cb9e3 PS |
1084 | |
1085 | static int | |
1086 | validate_buf(unsigned int offset, unsigned int buffer_length, | |
1087 | struct smb2_hdr *hdr, unsigned int min_buf_size) | |
1088 | ||
1089 | { | |
1090 | unsigned int smb_len = be32_to_cpu(hdr->smb2_buf_length); | |
1091 | char *end_of_smb = smb_len + 4 /* RFC1001 length field */ + (char *)hdr; | |
1092 | char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr; | |
1093 | char *end_of_buf = begin_of_buf + buffer_length; | |
1094 | ||
1095 | ||
1096 | if (buffer_length < min_buf_size) { | |
f96637be JP |
1097 | cifs_dbg(VFS, "buffer length %d smaller than minimum size %d\n", |
1098 | buffer_length, min_buf_size); | |
be4cb9e3 PS |
1099 | return -EINVAL; |
1100 | } | |
1101 | ||
1102 | /* check if beyond RFC1001 maximum length */ | |
1103 | if ((smb_len > 0x7FFFFF) || (buffer_length > 0x7FFFFF)) { | |
f96637be JP |
1104 | cifs_dbg(VFS, "buffer length %d or smb length %d too large\n", |
1105 | buffer_length, smb_len); | |
be4cb9e3 PS |
1106 | return -EINVAL; |
1107 | } | |
1108 | ||
1109 | if ((begin_of_buf > end_of_smb) || (end_of_buf > end_of_smb)) { | |
f96637be | 1110 | cifs_dbg(VFS, "illegal server response, bad offset to data\n"); |
be4cb9e3 PS |
1111 | return -EINVAL; |
1112 | } | |
1113 | ||
1114 | return 0; | |
1115 | } | |
1116 | ||
1117 | /* | |
1118 | * If SMB buffer fields are valid, copy into temporary buffer to hold result. | |
1119 | * Caller must free buffer. | |
1120 | */ | |
1121 | static int | |
1122 | validate_and_copy_buf(unsigned int offset, unsigned int buffer_length, | |
1123 | struct smb2_hdr *hdr, unsigned int minbufsize, | |
1124 | char *data) | |
1125 | ||
1126 | { | |
1127 | char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr; | |
1128 | int rc; | |
1129 | ||
1130 | if (!data) | |
1131 | return -EINVAL; | |
1132 | ||
1133 | rc = validate_buf(offset, buffer_length, hdr, minbufsize); | |
1134 | if (rc) | |
1135 | return rc; | |
1136 | ||
1137 | memcpy(data, begin_of_buf, buffer_length); | |
1138 | ||
1139 | return 0; | |
1140 | } | |
1141 | ||
f0df737e PS |
1142 | static int |
1143 | query_info(const unsigned int xid, struct cifs_tcon *tcon, | |
1144 | u64 persistent_fid, u64 volatile_fid, u8 info_class, | |
1145 | size_t output_len, size_t min_len, void *data) | |
be4cb9e3 PS |
1146 | { |
1147 | struct smb2_query_info_req *req; | |
1148 | struct smb2_query_info_rsp *rsp = NULL; | |
1149 | struct kvec iov[2]; | |
1150 | int rc = 0; | |
1151 | int resp_buftype; | |
1152 | struct TCP_Server_Info *server; | |
1153 | struct cifs_ses *ses = tcon->ses; | |
1154 | ||
f96637be | 1155 | cifs_dbg(FYI, "Query Info\n"); |
be4cb9e3 PS |
1156 | |
1157 | if (ses && (ses->server)) | |
1158 | server = ses->server; | |
1159 | else | |
1160 | return -EIO; | |
1161 | ||
1162 | rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req); | |
1163 | if (rc) | |
1164 | return rc; | |
1165 | ||
1166 | req->InfoType = SMB2_O_INFO_FILE; | |
f0df737e | 1167 | req->FileInfoClass = info_class; |
be4cb9e3 PS |
1168 | req->PersistentFileId = persistent_fid; |
1169 | req->VolatileFileId = volatile_fid; | |
1170 | /* 4 for rfc1002 length field and 1 for Buffer */ | |
1171 | req->InputBufferOffset = | |
1172 | cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4); | |
f0df737e | 1173 | req->OutputBufferLength = cpu_to_le32(output_len); |
be4cb9e3 PS |
1174 | |
1175 | iov[0].iov_base = (char *)req; | |
1176 | /* 4 for rfc1002 length field */ | |
1177 | iov[0].iov_len = get_rfc1002_length(req) + 4; | |
1178 | ||
1179 | rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0); | |
e5d04887 PS |
1180 | rsp = (struct smb2_query_info_rsp *)iov[0].iov_base; |
1181 | ||
be4cb9e3 PS |
1182 | if (rc) { |
1183 | cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE); | |
1184 | goto qinf_exit; | |
1185 | } | |
1186 | ||
be4cb9e3 PS |
1187 | rc = validate_and_copy_buf(le16_to_cpu(rsp->OutputBufferOffset), |
1188 | le32_to_cpu(rsp->OutputBufferLength), | |
f0df737e | 1189 | &rsp->hdr, min_len, data); |
be4cb9e3 PS |
1190 | |
1191 | qinf_exit: | |
1192 | free_rsp_buf(resp_buftype, rsp); | |
1193 | return rc; | |
1194 | } | |
9094fad1 | 1195 | |
f0df737e PS |
1196 | int |
1197 | SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon, | |
1198 | u64 persistent_fid, u64 volatile_fid, | |
1199 | struct smb2_file_all_info *data) | |
1200 | { | |
1201 | return query_info(xid, tcon, persistent_fid, volatile_fid, | |
1202 | FILE_ALL_INFORMATION, | |
1203 | sizeof(struct smb2_file_all_info) + MAX_NAME * 2, | |
1204 | sizeof(struct smb2_file_all_info), data); | |
1205 | } | |
1206 | ||
1207 | int | |
1208 | SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon, | |
1209 | u64 persistent_fid, u64 volatile_fid, __le64 *uniqueid) | |
1210 | { | |
1211 | return query_info(xid, tcon, persistent_fid, volatile_fid, | |
1212 | FILE_INTERNAL_INFORMATION, | |
1213 | sizeof(struct smb2_file_internal_info), | |
1214 | sizeof(struct smb2_file_internal_info), uniqueid); | |
1215 | } | |
1216 | ||
9094fad1 PS |
1217 | /* |
1218 | * This is a no-op for now. We're not really interested in the reply, but | |
1219 | * rather in the fact that the server sent one and that server->lstrp | |
1220 | * gets updated. | |
1221 | * | |
1222 | * FIXME: maybe we should consider checking that the reply matches request? | |
1223 | */ | |
1224 | static void | |
1225 | smb2_echo_callback(struct mid_q_entry *mid) | |
1226 | { | |
1227 | struct TCP_Server_Info *server = mid->callback_data; | |
1228 | struct smb2_echo_rsp *smb2 = (struct smb2_echo_rsp *)mid->resp_buf; | |
1229 | unsigned int credits_received = 1; | |
1230 | ||
1231 | if (mid->mid_state == MID_RESPONSE_RECEIVED) | |
1232 | credits_received = le16_to_cpu(smb2->hdr.CreditRequest); | |
1233 | ||
1234 | DeleteMidQEntry(mid); | |
1235 | add_credits(server, credits_received, CIFS_ECHO_OP); | |
1236 | } | |
1237 | ||
1238 | int | |
1239 | SMB2_echo(struct TCP_Server_Info *server) | |
1240 | { | |
1241 | struct smb2_echo_req *req; | |
1242 | int rc = 0; | |
1243 | struct kvec iov; | |
fec344e3 JL |
1244 | struct smb_rqst rqst = { .rq_iov = &iov, |
1245 | .rq_nvec = 1 }; | |
9094fad1 | 1246 | |
f96637be | 1247 | cifs_dbg(FYI, "In echo request\n"); |
9094fad1 PS |
1248 | |
1249 | rc = small_smb2_init(SMB2_ECHO, NULL, (void **)&req); | |
1250 | if (rc) | |
1251 | return rc; | |
1252 | ||
1253 | req->hdr.CreditRequest = cpu_to_le16(1); | |
1254 | ||
1255 | iov.iov_base = (char *)req; | |
1256 | /* 4 for rfc1002 length field */ | |
1257 | iov.iov_len = get_rfc1002_length(req) + 4; | |
1258 | ||
fec344e3 | 1259 | rc = cifs_call_async(server, &rqst, NULL, smb2_echo_callback, server, |
9094fad1 PS |
1260 | CIFS_ECHO_OP); |
1261 | if (rc) | |
f96637be | 1262 | cifs_dbg(FYI, "Echo request failed: %d\n", rc); |
9094fad1 PS |
1263 | |
1264 | cifs_small_buf_release(req); | |
1265 | return rc; | |
1266 | } | |
7a5cfb19 PS |
1267 | |
1268 | int | |
1269 | SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, | |
1270 | u64 volatile_fid) | |
1271 | { | |
1272 | struct smb2_flush_req *req; | |
1273 | struct TCP_Server_Info *server; | |
1274 | struct cifs_ses *ses = tcon->ses; | |
1275 | struct kvec iov[1]; | |
1276 | int resp_buftype; | |
1277 | int rc = 0; | |
1278 | ||
f96637be | 1279 | cifs_dbg(FYI, "Flush\n"); |
7a5cfb19 PS |
1280 | |
1281 | if (ses && (ses->server)) | |
1282 | server = ses->server; | |
1283 | else | |
1284 | return -EIO; | |
1285 | ||
1286 | rc = small_smb2_init(SMB2_FLUSH, tcon, (void **) &req); | |
1287 | if (rc) | |
1288 | return rc; | |
1289 | ||
1290 | req->PersistentFileId = persistent_fid; | |
1291 | req->VolatileFileId = volatile_fid; | |
1292 | ||
1293 | iov[0].iov_base = (char *)req; | |
1294 | /* 4 for rfc1002 length field */ | |
1295 | iov[0].iov_len = get_rfc1002_length(req) + 4; | |
1296 | ||
1297 | rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0); | |
1298 | ||
1299 | if ((rc != 0) && tcon) | |
1300 | cifs_stats_fail_inc(tcon, SMB2_FLUSH_HE); | |
1301 | ||
1302 | free_rsp_buf(resp_buftype, iov[0].iov_base); | |
1303 | return rc; | |
1304 | } | |
09a4707e PS |
1305 | |
1306 | /* | |
1307 | * To form a chain of read requests, any read requests after the first should | |
1308 | * have the end_of_chain boolean set to true. | |
1309 | */ | |
1310 | static int | |
1311 | smb2_new_read_req(struct kvec *iov, struct cifs_io_parms *io_parms, | |
1312 | unsigned int remaining_bytes, int request_type) | |
1313 | { | |
1314 | int rc = -EACCES; | |
1315 | struct smb2_read_req *req = NULL; | |
1316 | ||
1317 | rc = small_smb2_init(SMB2_READ, io_parms->tcon, (void **) &req); | |
1318 | if (rc) | |
1319 | return rc; | |
1320 | if (io_parms->tcon->ses->server == NULL) | |
1321 | return -ECONNABORTED; | |
1322 | ||
1323 | req->hdr.ProcessId = cpu_to_le32(io_parms->pid); | |
1324 | ||
1325 | req->PersistentFileId = io_parms->persistent_fid; | |
1326 | req->VolatileFileId = io_parms->volatile_fid; | |
1327 | req->ReadChannelInfoOffset = 0; /* reserved */ | |
1328 | req->ReadChannelInfoLength = 0; /* reserved */ | |
1329 | req->Channel = 0; /* reserved */ | |
1330 | req->MinimumCount = 0; | |
1331 | req->Length = cpu_to_le32(io_parms->length); | |
1332 | req->Offset = cpu_to_le64(io_parms->offset); | |
1333 | ||
1334 | if (request_type & CHAINED_REQUEST) { | |
1335 | if (!(request_type & END_OF_CHAIN)) { | |
1336 | /* 4 for rfc1002 length field */ | |
1337 | req->hdr.NextCommand = | |
1338 | cpu_to_le32(get_rfc1002_length(req) + 4); | |
1339 | } else /* END_OF_CHAIN */ | |
1340 | req->hdr.NextCommand = 0; | |
1341 | if (request_type & RELATED_REQUEST) { | |
1342 | req->hdr.Flags |= SMB2_FLAGS_RELATED_OPERATIONS; | |
1343 | /* | |
1344 | * Related requests use info from previous read request | |
1345 | * in chain. | |
1346 | */ | |
1347 | req->hdr.SessionId = 0xFFFFFFFF; | |
1348 | req->hdr.TreeId = 0xFFFFFFFF; | |
1349 | req->PersistentFileId = 0xFFFFFFFF; | |
1350 | req->VolatileFileId = 0xFFFFFFFF; | |
1351 | } | |
1352 | } | |
1353 | if (remaining_bytes > io_parms->length) | |
1354 | req->RemainingBytes = cpu_to_le32(remaining_bytes); | |
1355 | else | |
1356 | req->RemainingBytes = 0; | |
1357 | ||
1358 | iov[0].iov_base = (char *)req; | |
1359 | /* 4 for rfc1002 length field */ | |
1360 | iov[0].iov_len = get_rfc1002_length(req) + 4; | |
1361 | return rc; | |
1362 | } | |
1363 | ||
1364 | static void | |
1365 | smb2_readv_callback(struct mid_q_entry *mid) | |
1366 | { | |
1367 | struct cifs_readdata *rdata = mid->callback_data; | |
1368 | struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink); | |
1369 | struct TCP_Server_Info *server = tcon->ses->server; | |
5819575e | 1370 | struct smb2_hdr *buf = (struct smb2_hdr *)rdata->iov.iov_base; |
09a4707e | 1371 | unsigned int credits_received = 1; |
5819575e | 1372 | struct smb_rqst rqst = { .rq_iov = &rdata->iov, |
8321fec4 JL |
1373 | .rq_nvec = 1, |
1374 | .rq_pages = rdata->pages, | |
1375 | .rq_npages = rdata->nr_pages, | |
1376 | .rq_pagesz = rdata->pagesz, | |
1377 | .rq_tailsz = rdata->tailsz }; | |
09a4707e | 1378 | |
f96637be JP |
1379 | cifs_dbg(FYI, "%s: mid=%llu state=%d result=%d bytes=%u\n", |
1380 | __func__, mid->mid, mid->mid_state, rdata->result, | |
1381 | rdata->bytes); | |
09a4707e PS |
1382 | |
1383 | switch (mid->mid_state) { | |
1384 | case MID_RESPONSE_RECEIVED: | |
1385 | credits_received = le16_to_cpu(buf->CreditRequest); | |
1386 | /* result already set, check signature */ | |
3c1bf7e4 PS |
1387 | if (server->sec_mode & |
1388 | (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) { | |
1389 | int rc; | |
1390 | ||
0b688cfc | 1391 | rc = smb2_verify_signature(&rqst, server); |
3c1bf7e4 | 1392 | if (rc) |
f96637be JP |
1393 | cifs_dbg(VFS, "SMB signature verification returned error = %d\n", |
1394 | rc); | |
3c1bf7e4 | 1395 | } |
09a4707e PS |
1396 | /* FIXME: should this be counted toward the initiating task? */ |
1397 | task_io_account_read(rdata->bytes); | |
1398 | cifs_stats_bytes_read(tcon, rdata->bytes); | |
1399 | break; | |
1400 | case MID_REQUEST_SUBMITTED: | |
1401 | case MID_RETRY_NEEDED: | |
1402 | rdata->result = -EAGAIN; | |
1403 | break; | |
1404 | default: | |
1405 | if (rdata->result != -ENODATA) | |
1406 | rdata->result = -EIO; | |
1407 | } | |
1408 | ||
1409 | if (rdata->result) | |
1410 | cifs_stats_fail_inc(tcon, SMB2_READ_HE); | |
1411 | ||
1412 | queue_work(cifsiod_wq, &rdata->work); | |
1413 | DeleteMidQEntry(mid); | |
1414 | add_credits(server, credits_received, 0); | |
1415 | } | |
1416 | ||
1417 | /* smb2_async_readv - send an async write, and set up mid to handle result */ | |
1418 | int | |
1419 | smb2_async_readv(struct cifs_readdata *rdata) | |
1420 | { | |
1421 | int rc; | |
1422 | struct smb2_hdr *buf; | |
1423 | struct cifs_io_parms io_parms; | |
5819575e | 1424 | struct smb_rqst rqst = { .rq_iov = &rdata->iov, |
fec344e3 | 1425 | .rq_nvec = 1 }; |
09a4707e | 1426 | |
f96637be JP |
1427 | cifs_dbg(FYI, "%s: offset=%llu bytes=%u\n", |
1428 | __func__, rdata->offset, rdata->bytes); | |
09a4707e PS |
1429 | |
1430 | io_parms.tcon = tlink_tcon(rdata->cfile->tlink); | |
1431 | io_parms.offset = rdata->offset; | |
1432 | io_parms.length = rdata->bytes; | |
1433 | io_parms.persistent_fid = rdata->cfile->fid.persistent_fid; | |
1434 | io_parms.volatile_fid = rdata->cfile->fid.volatile_fid; | |
1435 | io_parms.pid = rdata->pid; | |
5819575e | 1436 | rc = smb2_new_read_req(&rdata->iov, &io_parms, 0, 0); |
09a4707e PS |
1437 | if (rc) |
1438 | return rc; | |
1439 | ||
5819575e | 1440 | buf = (struct smb2_hdr *)rdata->iov.iov_base; |
09a4707e | 1441 | /* 4 for rfc1002 length field */ |
5819575e | 1442 | rdata->iov.iov_len = get_rfc1002_length(rdata->iov.iov_base) + 4; |
09a4707e PS |
1443 | |
1444 | kref_get(&rdata->refcount); | |
fec344e3 | 1445 | rc = cifs_call_async(io_parms.tcon->ses->server, &rqst, |
09a4707e PS |
1446 | cifs_readv_receive, smb2_readv_callback, |
1447 | rdata, 0); | |
e5d04887 | 1448 | if (rc) { |
09a4707e | 1449 | kref_put(&rdata->refcount, cifs_readdata_release); |
e5d04887 PS |
1450 | cifs_stats_fail_inc(io_parms.tcon, SMB2_READ_HE); |
1451 | } | |
09a4707e PS |
1452 | |
1453 | cifs_small_buf_release(buf); | |
1454 | return rc; | |
1455 | } | |
33319141 | 1456 | |
d8e05039 PS |
1457 | int |
1458 | SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms, | |
1459 | unsigned int *nbytes, char **buf, int *buf_type) | |
1460 | { | |
1461 | int resp_buftype, rc = -EACCES; | |
1462 | struct smb2_read_rsp *rsp = NULL; | |
1463 | struct kvec iov[1]; | |
1464 | ||
1465 | *nbytes = 0; | |
1466 | rc = smb2_new_read_req(iov, io_parms, 0, 0); | |
1467 | if (rc) | |
1468 | return rc; | |
1469 | ||
1470 | rc = SendReceive2(xid, io_parms->tcon->ses, iov, 1, | |
1471 | &resp_buftype, CIFS_LOG_ERROR); | |
1472 | ||
1473 | rsp = (struct smb2_read_rsp *)iov[0].iov_base; | |
1474 | ||
1475 | if (rsp->hdr.Status == STATUS_END_OF_FILE) { | |
1476 | free_rsp_buf(resp_buftype, iov[0].iov_base); | |
1477 | return 0; | |
1478 | } | |
1479 | ||
1480 | if (rc) { | |
1481 | cifs_stats_fail_inc(io_parms->tcon, SMB2_READ_HE); | |
f96637be | 1482 | cifs_dbg(VFS, "Send error in read = %d\n", rc); |
d8e05039 PS |
1483 | } else { |
1484 | *nbytes = le32_to_cpu(rsp->DataLength); | |
1485 | if ((*nbytes > CIFS_MAX_MSGSIZE) || | |
1486 | (*nbytes > io_parms->length)) { | |
f96637be JP |
1487 | cifs_dbg(FYI, "bad length %d for count %d\n", |
1488 | *nbytes, io_parms->length); | |
d8e05039 PS |
1489 | rc = -EIO; |
1490 | *nbytes = 0; | |
1491 | } | |
1492 | } | |
1493 | ||
1494 | if (*buf) { | |
1495 | memcpy(*buf, (char *)rsp->hdr.ProtocolId + rsp->DataOffset, | |
1496 | *nbytes); | |
1497 | free_rsp_buf(resp_buftype, iov[0].iov_base); | |
1498 | } else if (resp_buftype != CIFS_NO_BUFFER) { | |
1499 | *buf = iov[0].iov_base; | |
1500 | if (resp_buftype == CIFS_SMALL_BUFFER) | |
1501 | *buf_type = CIFS_SMALL_BUFFER; | |
1502 | else if (resp_buftype == CIFS_LARGE_BUFFER) | |
1503 | *buf_type = CIFS_LARGE_BUFFER; | |
1504 | } | |
1505 | return rc; | |
1506 | } | |
1507 | ||
33319141 PS |
1508 | /* |
1509 | * Check the mid_state and signature on received buffer (if any), and queue the | |
1510 | * workqueue completion task. | |
1511 | */ | |
1512 | static void | |
1513 | smb2_writev_callback(struct mid_q_entry *mid) | |
1514 | { | |
1515 | struct cifs_writedata *wdata = mid->callback_data; | |
1516 | struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink); | |
1517 | unsigned int written; | |
1518 | struct smb2_write_rsp *rsp = (struct smb2_write_rsp *)mid->resp_buf; | |
1519 | unsigned int credits_received = 1; | |
1520 | ||
1521 | switch (mid->mid_state) { | |
1522 | case MID_RESPONSE_RECEIVED: | |
1523 | credits_received = le16_to_cpu(rsp->hdr.CreditRequest); | |
1524 | wdata->result = smb2_check_receive(mid, tcon->ses->server, 0); | |
1525 | if (wdata->result != 0) | |
1526 | break; | |
1527 | ||
1528 | written = le32_to_cpu(rsp->DataLength); | |
1529 | /* | |
1530 | * Mask off high 16 bits when bytes written as returned | |
1531 | * by the server is greater than bytes requested by the | |
1532 | * client. OS/2 servers are known to set incorrect | |
1533 | * CountHigh values. | |
1534 | */ | |
1535 | if (written > wdata->bytes) | |
1536 | written &= 0xFFFF; | |
1537 | ||
1538 | if (written < wdata->bytes) | |
1539 | wdata->result = -ENOSPC; | |
1540 | else | |
1541 | wdata->bytes = written; | |
1542 | break; | |
1543 | case MID_REQUEST_SUBMITTED: | |
1544 | case MID_RETRY_NEEDED: | |
1545 | wdata->result = -EAGAIN; | |
1546 | break; | |
1547 | default: | |
1548 | wdata->result = -EIO; | |
1549 | break; | |
1550 | } | |
1551 | ||
1552 | if (wdata->result) | |
1553 | cifs_stats_fail_inc(tcon, SMB2_WRITE_HE); | |
1554 | ||
1555 | queue_work(cifsiod_wq, &wdata->work); | |
1556 | DeleteMidQEntry(mid); | |
1557 | add_credits(tcon->ses->server, credits_received, 0); | |
1558 | } | |
1559 | ||
1560 | /* smb2_async_writev - send an async write, and set up mid to handle result */ | |
1561 | int | |
1562 | smb2_async_writev(struct cifs_writedata *wdata) | |
1563 | { | |
eddb079d | 1564 | int rc = -EACCES; |
33319141 PS |
1565 | struct smb2_write_req *req = NULL; |
1566 | struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink); | |
eddb079d | 1567 | struct kvec iov; |
fec344e3 | 1568 | struct smb_rqst rqst; |
33319141 PS |
1569 | |
1570 | rc = small_smb2_init(SMB2_WRITE, tcon, (void **) &req); | |
1571 | if (rc) | |
1572 | goto async_writev_out; | |
1573 | ||
33319141 PS |
1574 | req->hdr.ProcessId = cpu_to_le32(wdata->cfile->pid); |
1575 | ||
1576 | req->PersistentFileId = wdata->cfile->fid.persistent_fid; | |
1577 | req->VolatileFileId = wdata->cfile->fid.volatile_fid; | |
1578 | req->WriteChannelInfoOffset = 0; | |
1579 | req->WriteChannelInfoLength = 0; | |
1580 | req->Channel = 0; | |
1581 | req->Offset = cpu_to_le64(wdata->offset); | |
1582 | /* 4 for rfc1002 length field */ | |
1583 | req->DataOffset = cpu_to_le16( | |
1584 | offsetof(struct smb2_write_req, Buffer) - 4); | |
1585 | req->RemainingBytes = 0; | |
1586 | ||
1587 | /* 4 for rfc1002 length field and 1 for Buffer */ | |
eddb079d JL |
1588 | iov.iov_len = get_rfc1002_length(req) + 4 - 1; |
1589 | iov.iov_base = req; | |
33319141 | 1590 | |
eddb079d JL |
1591 | rqst.rq_iov = &iov; |
1592 | rqst.rq_nvec = 1; | |
1593 | rqst.rq_pages = wdata->pages; | |
1594 | rqst.rq_npages = wdata->nr_pages; | |
1595 | rqst.rq_pagesz = wdata->pagesz; | |
1596 | rqst.rq_tailsz = wdata->tailsz; | |
33319141 | 1597 | |
f96637be JP |
1598 | cifs_dbg(FYI, "async write at %llu %u bytes\n", |
1599 | wdata->offset, wdata->bytes); | |
33319141 PS |
1600 | |
1601 | req->Length = cpu_to_le32(wdata->bytes); | |
1602 | ||
1603 | inc_rfc1001_len(&req->hdr, wdata->bytes - 1 /* Buffer */); | |
1604 | ||
1605 | kref_get(&wdata->refcount); | |
fec344e3 JL |
1606 | rc = cifs_call_async(tcon->ses->server, &rqst, NULL, |
1607 | smb2_writev_callback, wdata, 0); | |
33319141 | 1608 | |
e5d04887 | 1609 | if (rc) { |
33319141 | 1610 | kref_put(&wdata->refcount, cifs_writedata_release); |
e5d04887 PS |
1611 | cifs_stats_fail_inc(tcon, SMB2_WRITE_HE); |
1612 | } | |
33319141 | 1613 | |
33319141 PS |
1614 | async_writev_out: |
1615 | cifs_small_buf_release(req); | |
33319141 PS |
1616 | return rc; |
1617 | } | |
009d3443 PS |
1618 | |
1619 | /* | |
1620 | * SMB2_write function gets iov pointer to kvec array with n_vec as a length. | |
1621 | * The length field from io_parms must be at least 1 and indicates a number of | |
1622 | * elements with data to write that begins with position 1 in iov array. All | |
1623 | * data length is specified by count. | |
1624 | */ | |
1625 | int | |
1626 | SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms, | |
1627 | unsigned int *nbytes, struct kvec *iov, int n_vec) | |
1628 | { | |
1629 | int rc = 0; | |
1630 | struct smb2_write_req *req = NULL; | |
1631 | struct smb2_write_rsp *rsp = NULL; | |
1632 | int resp_buftype; | |
1633 | *nbytes = 0; | |
1634 | ||
1635 | if (n_vec < 1) | |
1636 | return rc; | |
1637 | ||
1638 | rc = small_smb2_init(SMB2_WRITE, io_parms->tcon, (void **) &req); | |
1639 | if (rc) | |
1640 | return rc; | |
1641 | ||
1642 | if (io_parms->tcon->ses->server == NULL) | |
1643 | return -ECONNABORTED; | |
1644 | ||
1645 | req->hdr.ProcessId = cpu_to_le32(io_parms->pid); | |
1646 | ||
1647 | req->PersistentFileId = io_parms->persistent_fid; | |
1648 | req->VolatileFileId = io_parms->volatile_fid; | |
1649 | req->WriteChannelInfoOffset = 0; | |
1650 | req->WriteChannelInfoLength = 0; | |
1651 | req->Channel = 0; | |
1652 | req->Length = cpu_to_le32(io_parms->length); | |
1653 | req->Offset = cpu_to_le64(io_parms->offset); | |
1654 | /* 4 for rfc1002 length field */ | |
1655 | req->DataOffset = cpu_to_le16( | |
1656 | offsetof(struct smb2_write_req, Buffer) - 4); | |
1657 | req->RemainingBytes = 0; | |
1658 | ||
1659 | iov[0].iov_base = (char *)req; | |
1660 | /* 4 for rfc1002 length field and 1 for Buffer */ | |
1661 | iov[0].iov_len = get_rfc1002_length(req) + 4 - 1; | |
1662 | ||
1663 | /* length of entire message including data to be written */ | |
1664 | inc_rfc1001_len(req, io_parms->length - 1 /* Buffer */); | |
1665 | ||
1666 | rc = SendReceive2(xid, io_parms->tcon->ses, iov, n_vec + 1, | |
1667 | &resp_buftype, 0); | |
e5d04887 | 1668 | rsp = (struct smb2_write_rsp *)iov[0].iov_base; |
009d3443 PS |
1669 | |
1670 | if (rc) { | |
1671 | cifs_stats_fail_inc(io_parms->tcon, SMB2_WRITE_HE); | |
f96637be | 1672 | cifs_dbg(VFS, "Send error in write = %d\n", rc); |
e5d04887 | 1673 | } else |
009d3443 | 1674 | *nbytes = le32_to_cpu(rsp->DataLength); |
e5d04887 PS |
1675 | |
1676 | free_rsp_buf(resp_buftype, rsp); | |
009d3443 PS |
1677 | return rc; |
1678 | } | |
35143eb5 | 1679 | |
d324f08d PS |
1680 | static unsigned int |
1681 | num_entries(char *bufstart, char *end_of_buf, char **lastentry, size_t size) | |
1682 | { | |
1683 | int len; | |
1684 | unsigned int entrycount = 0; | |
1685 | unsigned int next_offset = 0; | |
1686 | FILE_DIRECTORY_INFO *entryptr; | |
1687 | ||
1688 | if (bufstart == NULL) | |
1689 | return 0; | |
1690 | ||
1691 | entryptr = (FILE_DIRECTORY_INFO *)bufstart; | |
1692 | ||
1693 | while (1) { | |
1694 | entryptr = (FILE_DIRECTORY_INFO *) | |
1695 | ((char *)entryptr + next_offset); | |
1696 | ||
1697 | if ((char *)entryptr + size > end_of_buf) { | |
f96637be | 1698 | cifs_dbg(VFS, "malformed search entry would overflow\n"); |
d324f08d PS |
1699 | break; |
1700 | } | |
1701 | ||
1702 | len = le32_to_cpu(entryptr->FileNameLength); | |
1703 | if ((char *)entryptr + len + size > end_of_buf) { | |
f96637be JP |
1704 | cifs_dbg(VFS, "directory entry name would overflow frame end of buf %p\n", |
1705 | end_of_buf); | |
d324f08d PS |
1706 | break; |
1707 | } | |
1708 | ||
1709 | *lastentry = (char *)entryptr; | |
1710 | entrycount++; | |
1711 | ||
1712 | next_offset = le32_to_cpu(entryptr->NextEntryOffset); | |
1713 | if (!next_offset) | |
1714 | break; | |
1715 | } | |
1716 | ||
1717 | return entrycount; | |
1718 | } | |
1719 | ||
1720 | /* | |
1721 | * Readdir/FindFirst | |
1722 | */ | |
1723 | int | |
1724 | SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon, | |
1725 | u64 persistent_fid, u64 volatile_fid, int index, | |
1726 | struct cifs_search_info *srch_inf) | |
1727 | { | |
1728 | struct smb2_query_directory_req *req; | |
1729 | struct smb2_query_directory_rsp *rsp = NULL; | |
1730 | struct kvec iov[2]; | |
1731 | int rc = 0; | |
1732 | int len; | |
1733 | int resp_buftype; | |
1734 | unsigned char *bufptr; | |
1735 | struct TCP_Server_Info *server; | |
1736 | struct cifs_ses *ses = tcon->ses; | |
1737 | __le16 asteriks = cpu_to_le16('*'); | |
1738 | char *end_of_smb; | |
1739 | unsigned int output_size = CIFSMaxBufSize; | |
1740 | size_t info_buf_size; | |
1741 | ||
1742 | if (ses && (ses->server)) | |
1743 | server = ses->server; | |
1744 | else | |
1745 | return -EIO; | |
1746 | ||
1747 | rc = small_smb2_init(SMB2_QUERY_DIRECTORY, tcon, (void **) &req); | |
1748 | if (rc) | |
1749 | return rc; | |
1750 | ||
1751 | switch (srch_inf->info_level) { | |
1752 | case SMB_FIND_FILE_DIRECTORY_INFO: | |
1753 | req->FileInformationClass = FILE_DIRECTORY_INFORMATION; | |
1754 | info_buf_size = sizeof(FILE_DIRECTORY_INFO) - 1; | |
1755 | break; | |
1756 | case SMB_FIND_FILE_ID_FULL_DIR_INFO: | |
1757 | req->FileInformationClass = FILEID_FULL_DIRECTORY_INFORMATION; | |
1758 | info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO) - 1; | |
1759 | break; | |
1760 | default: | |
f96637be JP |
1761 | cifs_dbg(VFS, "info level %u isn't supported\n", |
1762 | srch_inf->info_level); | |
d324f08d PS |
1763 | rc = -EINVAL; |
1764 | goto qdir_exit; | |
1765 | } | |
1766 | ||
1767 | req->FileIndex = cpu_to_le32(index); | |
1768 | req->PersistentFileId = persistent_fid; | |
1769 | req->VolatileFileId = volatile_fid; | |
1770 | ||
1771 | len = 0x2; | |
1772 | bufptr = req->Buffer; | |
1773 | memcpy(bufptr, &asteriks, len); | |
1774 | ||
1775 | req->FileNameOffset = | |
1776 | cpu_to_le16(sizeof(struct smb2_query_directory_req) - 1 - 4); | |
1777 | req->FileNameLength = cpu_to_le16(len); | |
1778 | /* | |
1779 | * BB could be 30 bytes or so longer if we used SMB2 specific | |
1780 | * buffer lengths, but this is safe and close enough. | |
1781 | */ | |
1782 | output_size = min_t(unsigned int, output_size, server->maxBuf); | |
1783 | output_size = min_t(unsigned int, output_size, 2 << 15); | |
1784 | req->OutputBufferLength = cpu_to_le32(output_size); | |
1785 | ||
1786 | iov[0].iov_base = (char *)req; | |
1787 | /* 4 for RFC1001 length and 1 for Buffer */ | |
1788 | iov[0].iov_len = get_rfc1002_length(req) + 4 - 1; | |
1789 | ||
1790 | iov[1].iov_base = (char *)(req->Buffer); | |
1791 | iov[1].iov_len = len; | |
1792 | ||
1793 | inc_rfc1001_len(req, len - 1 /* Buffer */); | |
1794 | ||
1795 | rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, 0); | |
e5d04887 PS |
1796 | rsp = (struct smb2_query_directory_rsp *)iov[0].iov_base; |
1797 | ||
d324f08d PS |
1798 | if (rc) { |
1799 | cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE); | |
1800 | goto qdir_exit; | |
1801 | } | |
d324f08d PS |
1802 | |
1803 | rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset), | |
1804 | le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr, | |
1805 | info_buf_size); | |
1806 | if (rc) | |
1807 | goto qdir_exit; | |
1808 | ||
1809 | srch_inf->unicode = true; | |
1810 | ||
1811 | if (srch_inf->ntwrk_buf_start) { | |
1812 | if (srch_inf->smallBuf) | |
1813 | cifs_small_buf_release(srch_inf->ntwrk_buf_start); | |
1814 | else | |
1815 | cifs_buf_release(srch_inf->ntwrk_buf_start); | |
1816 | } | |
1817 | srch_inf->ntwrk_buf_start = (char *)rsp; | |
1818 | srch_inf->srch_entries_start = srch_inf->last_entry = 4 /* rfclen */ + | |
1819 | (char *)&rsp->hdr + le16_to_cpu(rsp->OutputBufferOffset); | |
1820 | /* 4 for rfc1002 length field */ | |
1821 | end_of_smb = get_rfc1002_length(rsp) + 4 + (char *)&rsp->hdr; | |
1822 | srch_inf->entries_in_buffer = | |
1823 | num_entries(srch_inf->srch_entries_start, end_of_smb, | |
1824 | &srch_inf->last_entry, info_buf_size); | |
1825 | srch_inf->index_of_last_entry += srch_inf->entries_in_buffer; | |
f96637be JP |
1826 | cifs_dbg(FYI, "num entries %d last_index %lld srch start %p srch end %p\n", |
1827 | srch_inf->entries_in_buffer, srch_inf->index_of_last_entry, | |
1828 | srch_inf->srch_entries_start, srch_inf->last_entry); | |
d324f08d PS |
1829 | if (resp_buftype == CIFS_LARGE_BUFFER) |
1830 | srch_inf->smallBuf = false; | |
1831 | else if (resp_buftype == CIFS_SMALL_BUFFER) | |
1832 | srch_inf->smallBuf = true; | |
1833 | else | |
f96637be | 1834 | cifs_dbg(VFS, "illegal search buffer type\n"); |
d324f08d PS |
1835 | |
1836 | if (rsp->hdr.Status == STATUS_NO_MORE_FILES) | |
1837 | srch_inf->endOfSearch = 1; | |
1838 | else | |
1839 | srch_inf->endOfSearch = 0; | |
1840 | ||
1841 | return rc; | |
1842 | ||
1843 | qdir_exit: | |
1844 | free_rsp_buf(resp_buftype, rsp); | |
1845 | return rc; | |
1846 | } | |
1847 | ||
35143eb5 PS |
1848 | static int |
1849 | send_set_info(const unsigned int xid, struct cifs_tcon *tcon, | |
c839ff24 | 1850 | u64 persistent_fid, u64 volatile_fid, u32 pid, int info_class, |
35143eb5 PS |
1851 | unsigned int num, void **data, unsigned int *size) |
1852 | { | |
1853 | struct smb2_set_info_req *req; | |
1854 | struct smb2_set_info_rsp *rsp = NULL; | |
1855 | struct kvec *iov; | |
1856 | int rc = 0; | |
1857 | int resp_buftype; | |
1858 | unsigned int i; | |
1859 | struct TCP_Server_Info *server; | |
1860 | struct cifs_ses *ses = tcon->ses; | |
1861 | ||
1862 | if (ses && (ses->server)) | |
1863 | server = ses->server; | |
1864 | else | |
1865 | return -EIO; | |
1866 | ||
1867 | if (!num) | |
1868 | return -EINVAL; | |
1869 | ||
1870 | iov = kmalloc(sizeof(struct kvec) * num, GFP_KERNEL); | |
1871 | if (!iov) | |
1872 | return -ENOMEM; | |
1873 | ||
1874 | rc = small_smb2_init(SMB2_SET_INFO, tcon, (void **) &req); | |
1875 | if (rc) { | |
1876 | kfree(iov); | |
1877 | return rc; | |
1878 | } | |
1879 | ||
c839ff24 PS |
1880 | req->hdr.ProcessId = cpu_to_le32(pid); |
1881 | ||
35143eb5 PS |
1882 | req->InfoType = SMB2_O_INFO_FILE; |
1883 | req->FileInfoClass = info_class; | |
1884 | req->PersistentFileId = persistent_fid; | |
1885 | req->VolatileFileId = volatile_fid; | |
1886 | ||
1887 | /* 4 for RFC1001 length and 1 for Buffer */ | |
1888 | req->BufferOffset = | |
1889 | cpu_to_le16(sizeof(struct smb2_set_info_req) - 1 - 4); | |
1890 | req->BufferLength = cpu_to_le32(*size); | |
1891 | ||
1892 | inc_rfc1001_len(req, *size - 1 /* Buffer */); | |
1893 | ||
1894 | memcpy(req->Buffer, *data, *size); | |
1895 | ||
1896 | iov[0].iov_base = (char *)req; | |
1897 | /* 4 for RFC1001 length */ | |
1898 | iov[0].iov_len = get_rfc1002_length(req) + 4; | |
1899 | ||
1900 | for (i = 1; i < num; i++) { | |
1901 | inc_rfc1001_len(req, size[i]); | |
1902 | le32_add_cpu(&req->BufferLength, size[i]); | |
1903 | iov[i].iov_base = (char *)data[i]; | |
1904 | iov[i].iov_len = size[i]; | |
1905 | } | |
1906 | ||
1907 | rc = SendReceive2(xid, ses, iov, num, &resp_buftype, 0); | |
1908 | rsp = (struct smb2_set_info_rsp *)iov[0].iov_base; | |
1909 | ||
1910 | if (rc != 0) { | |
1911 | cifs_stats_fail_inc(tcon, SMB2_SET_INFO_HE); | |
1912 | goto out; | |
1913 | } | |
35143eb5 PS |
1914 | out: |
1915 | free_rsp_buf(resp_buftype, rsp); | |
1916 | kfree(iov); | |
1917 | return rc; | |
1918 | } | |
1919 | ||
1920 | int | |
1921 | SMB2_rename(const unsigned int xid, struct cifs_tcon *tcon, | |
1922 | u64 persistent_fid, u64 volatile_fid, __le16 *target_file) | |
1923 | { | |
1924 | struct smb2_file_rename_info info; | |
1925 | void **data; | |
1926 | unsigned int size[2]; | |
1927 | int rc; | |
1928 | int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX)); | |
1929 | ||
1930 | data = kmalloc(sizeof(void *) * 2, GFP_KERNEL); | |
1931 | if (!data) | |
1932 | return -ENOMEM; | |
1933 | ||
1934 | info.ReplaceIfExists = 1; /* 1 = replace existing target with new */ | |
1935 | /* 0 = fail if target already exists */ | |
1936 | info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */ | |
1937 | info.FileNameLength = cpu_to_le32(len); | |
1938 | ||
1939 | data[0] = &info; | |
1940 | size[0] = sizeof(struct smb2_file_rename_info); | |
1941 | ||
1942 | data[1] = target_file; | |
1943 | size[1] = len + 2 /* null */; | |
1944 | ||
1945 | rc = send_set_info(xid, tcon, persistent_fid, volatile_fid, | |
c839ff24 PS |
1946 | current->tgid, FILE_RENAME_INFORMATION, 2, data, |
1947 | size); | |
35143eb5 PS |
1948 | kfree(data); |
1949 | return rc; | |
1950 | } | |
568798cc PS |
1951 | |
1952 | int | |
1953 | SMB2_set_hardlink(const unsigned int xid, struct cifs_tcon *tcon, | |
1954 | u64 persistent_fid, u64 volatile_fid, __le16 *target_file) | |
1955 | { | |
1956 | struct smb2_file_link_info info; | |
1957 | void **data; | |
1958 | unsigned int size[2]; | |
1959 | int rc; | |
1960 | int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX)); | |
1961 | ||
1962 | data = kmalloc(sizeof(void *) * 2, GFP_KERNEL); | |
1963 | if (!data) | |
1964 | return -ENOMEM; | |
1965 | ||
1966 | info.ReplaceIfExists = 0; /* 1 = replace existing link with new */ | |
1967 | /* 0 = fail if link already exists */ | |
1968 | info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */ | |
1969 | info.FileNameLength = cpu_to_le32(len); | |
1970 | ||
1971 | data[0] = &info; | |
1972 | size[0] = sizeof(struct smb2_file_link_info); | |
1973 | ||
1974 | data[1] = target_file; | |
1975 | size[1] = len + 2 /* null */; | |
1976 | ||
1977 | rc = send_set_info(xid, tcon, persistent_fid, volatile_fid, | |
c839ff24 | 1978 | current->tgid, FILE_LINK_INFORMATION, 2, data, size); |
568798cc PS |
1979 | kfree(data); |
1980 | return rc; | |
1981 | } | |
c839ff24 PS |
1982 | |
1983 | int | |
1984 | SMB2_set_eof(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, | |
1985 | u64 volatile_fid, u32 pid, __le64 *eof) | |
1986 | { | |
1987 | struct smb2_file_eof_info info; | |
1988 | void *data; | |
1989 | unsigned int size; | |
1990 | ||
1991 | info.EndOfFile = *eof; | |
1992 | ||
1993 | data = &info; | |
1994 | size = sizeof(struct smb2_file_eof_info); | |
1995 | ||
1996 | return send_set_info(xid, tcon, persistent_fid, volatile_fid, pid, | |
1997 | FILE_END_OF_FILE_INFORMATION, 1, &data, &size); | |
1998 | } | |
1feeaac7 PS |
1999 | |
2000 | int | |
2001 | SMB2_set_info(const unsigned int xid, struct cifs_tcon *tcon, | |
2002 | u64 persistent_fid, u64 volatile_fid, FILE_BASIC_INFO *buf) | |
2003 | { | |
2004 | unsigned int size; | |
2005 | size = sizeof(FILE_BASIC_INFO); | |
2006 | return send_set_info(xid, tcon, persistent_fid, volatile_fid, | |
2007 | current->tgid, FILE_BASIC_INFORMATION, 1, | |
2008 | (void **)&buf, &size); | |
2009 | } | |
983c88a4 PS |
2010 | |
2011 | int | |
2012 | SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon, | |
2013 | const u64 persistent_fid, const u64 volatile_fid, | |
2014 | __u8 oplock_level) | |
2015 | { | |
2016 | int rc; | |
2017 | struct smb2_oplock_break *req = NULL; | |
2018 | ||
f96637be | 2019 | cifs_dbg(FYI, "SMB2_oplock_break\n"); |
983c88a4 PS |
2020 | rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req); |
2021 | ||
2022 | if (rc) | |
2023 | return rc; | |
2024 | ||
2025 | req->VolatileFid = volatile_fid; | |
2026 | req->PersistentFid = persistent_fid; | |
2027 | req->OplockLevel = oplock_level; | |
2028 | req->hdr.CreditRequest = cpu_to_le16(1); | |
2029 | ||
2030 | rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, CIFS_OBREAK_OP); | |
2031 | /* SMB2 buffer freed by function above */ | |
2032 | ||
2033 | if (rc) { | |
2034 | cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE); | |
f96637be | 2035 | cifs_dbg(FYI, "Send error in Oplock Break = %d\n", rc); |
983c88a4 PS |
2036 | } |
2037 | ||
2038 | return rc; | |
2039 | } | |
6fc05c25 PS |
2040 | |
2041 | static void | |
2042 | copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info *pfs_inf, | |
2043 | struct kstatfs *kst) | |
2044 | { | |
2045 | kst->f_bsize = le32_to_cpu(pfs_inf->BytesPerSector) * | |
2046 | le32_to_cpu(pfs_inf->SectorsPerAllocationUnit); | |
2047 | kst->f_blocks = le64_to_cpu(pfs_inf->TotalAllocationUnits); | |
2048 | kst->f_bfree = le64_to_cpu(pfs_inf->ActualAvailableAllocationUnits); | |
2049 | kst->f_bavail = le64_to_cpu(pfs_inf->CallerAvailableAllocationUnits); | |
2050 | return; | |
2051 | } | |
2052 | ||
2053 | static int | |
2054 | build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon, int level, | |
2055 | int outbuf_len, u64 persistent_fid, u64 volatile_fid) | |
2056 | { | |
2057 | int rc; | |
2058 | struct smb2_query_info_req *req; | |
2059 | ||
f96637be | 2060 | cifs_dbg(FYI, "Query FSInfo level %d\n", level); |
6fc05c25 PS |
2061 | |
2062 | if ((tcon->ses == NULL) || (tcon->ses->server == NULL)) | |
2063 | return -EIO; | |
2064 | ||
2065 | rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req); | |
2066 | if (rc) | |
2067 | return rc; | |
2068 | ||
2069 | req->InfoType = SMB2_O_INFO_FILESYSTEM; | |
2070 | req->FileInfoClass = level; | |
2071 | req->PersistentFileId = persistent_fid; | |
2072 | req->VolatileFileId = volatile_fid; | |
2073 | /* 4 for rfc1002 length field and 1 for pad */ | |
2074 | req->InputBufferOffset = | |
2075 | cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4); | |
2076 | req->OutputBufferLength = cpu_to_le32( | |
2077 | outbuf_len + sizeof(struct smb2_query_info_rsp) - 1 - 4); | |
2078 | ||
2079 | iov->iov_base = (char *)req; | |
2080 | /* 4 for rfc1002 length field */ | |
2081 | iov->iov_len = get_rfc1002_length(req) + 4; | |
2082 | return 0; | |
2083 | } | |
2084 | ||
2085 | int | |
2086 | SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon, | |
2087 | u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata) | |
2088 | { | |
2089 | struct smb2_query_info_rsp *rsp = NULL; | |
2090 | struct kvec iov; | |
2091 | int rc = 0; | |
2092 | int resp_buftype; | |
2093 | struct cifs_ses *ses = tcon->ses; | |
2094 | struct smb2_fs_full_size_info *info = NULL; | |
2095 | ||
2096 | rc = build_qfs_info_req(&iov, tcon, FS_FULL_SIZE_INFORMATION, | |
2097 | sizeof(struct smb2_fs_full_size_info), | |
2098 | persistent_fid, volatile_fid); | |
2099 | if (rc) | |
2100 | return rc; | |
2101 | ||
2102 | rc = SendReceive2(xid, ses, &iov, 1, &resp_buftype, 0); | |
2103 | if (rc) { | |
2104 | cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE); | |
2105 | goto qinf_exit; | |
2106 | } | |
2107 | rsp = (struct smb2_query_info_rsp *)iov.iov_base; | |
2108 | ||
2109 | info = (struct smb2_fs_full_size_info *)(4 /* RFC1001 len */ + | |
2110 | le16_to_cpu(rsp->OutputBufferOffset) + (char *)&rsp->hdr); | |
2111 | rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset), | |
2112 | le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr, | |
2113 | sizeof(struct smb2_fs_full_size_info)); | |
2114 | if (!rc) | |
2115 | copy_fs_info_to_kstatfs(info, fsdata); | |
2116 | ||
2117 | qinf_exit: | |
2118 | free_rsp_buf(resp_buftype, iov.iov_base); | |
2119 | return rc; | |
2120 | } | |
f7ba7fe6 PS |
2121 | |
2122 | int | |
2123 | smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon, | |
2124 | const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid, | |
2125 | const __u32 num_lock, struct smb2_lock_element *buf) | |
2126 | { | |
2127 | int rc = 0; | |
2128 | struct smb2_lock_req *req = NULL; | |
2129 | struct kvec iov[2]; | |
2130 | int resp_buf_type; | |
2131 | unsigned int count; | |
2132 | ||
f96637be | 2133 | cifs_dbg(FYI, "smb2_lockv num lock %d\n", num_lock); |
f7ba7fe6 PS |
2134 | |
2135 | rc = small_smb2_init(SMB2_LOCK, tcon, (void **) &req); | |
2136 | if (rc) | |
2137 | return rc; | |
2138 | ||
2139 | req->hdr.ProcessId = cpu_to_le32(pid); | |
2140 | req->LockCount = cpu_to_le16(num_lock); | |
2141 | ||
2142 | req->PersistentFileId = persist_fid; | |
2143 | req->VolatileFileId = volatile_fid; | |
2144 | ||
2145 | count = num_lock * sizeof(struct smb2_lock_element); | |
2146 | inc_rfc1001_len(req, count - sizeof(struct smb2_lock_element)); | |
2147 | ||
2148 | iov[0].iov_base = (char *)req; | |
2149 | /* 4 for rfc1002 length field and count for all locks */ | |
2150 | iov[0].iov_len = get_rfc1002_length(req) + 4 - count; | |
2151 | iov[1].iov_base = (char *)buf; | |
2152 | iov[1].iov_len = count; | |
2153 | ||
2154 | cifs_stats_inc(&tcon->stats.cifs_stats.num_locks); | |
2155 | rc = SendReceive2(xid, tcon->ses, iov, 2, &resp_buf_type, CIFS_NO_RESP); | |
2156 | if (rc) { | |
f96637be | 2157 | cifs_dbg(FYI, "Send error in smb2_lockv = %d\n", rc); |
f7ba7fe6 PS |
2158 | cifs_stats_fail_inc(tcon, SMB2_LOCK_HE); |
2159 | } | |
2160 | ||
2161 | return rc; | |
2162 | } | |
2163 | ||
2164 | int | |
2165 | SMB2_lock(const unsigned int xid, struct cifs_tcon *tcon, | |
2166 | const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid, | |
2167 | const __u64 length, const __u64 offset, const __u32 lock_flags, | |
2168 | const bool wait) | |
2169 | { | |
2170 | struct smb2_lock_element lock; | |
2171 | ||
2172 | lock.Offset = cpu_to_le64(offset); | |
2173 | lock.Length = cpu_to_le64(length); | |
2174 | lock.Flags = cpu_to_le32(lock_flags); | |
2175 | if (!wait && lock_flags != SMB2_LOCKFLAG_UNLOCK) | |
2176 | lock.Flags |= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY); | |
2177 | ||
2178 | return smb2_lockv(xid, tcon, persist_fid, volatile_fid, pid, 1, &lock); | |
2179 | } | |
0822f514 PS |
2180 | |
2181 | int | |
2182 | SMB2_lease_break(const unsigned int xid, struct cifs_tcon *tcon, | |
2183 | __u8 *lease_key, const __le32 lease_state) | |
2184 | { | |
2185 | int rc; | |
2186 | struct smb2_lease_ack *req = NULL; | |
2187 | ||
f96637be | 2188 | cifs_dbg(FYI, "SMB2_lease_break\n"); |
0822f514 PS |
2189 | rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req); |
2190 | ||
2191 | if (rc) | |
2192 | return rc; | |
2193 | ||
2194 | req->hdr.CreditRequest = cpu_to_le16(1); | |
2195 | req->StructureSize = cpu_to_le16(36); | |
2196 | inc_rfc1001_len(req, 12); | |
2197 | ||
2198 | memcpy(req->LeaseKey, lease_key, 16); | |
2199 | req->LeaseState = lease_state; | |
2200 | ||
2201 | rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, CIFS_OBREAK_OP); | |
2202 | /* SMB2 buffer freed by function above */ | |
2203 | ||
2204 | if (rc) { | |
2205 | cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE); | |
f96637be | 2206 | cifs_dbg(FYI, "Send error in Lease Break = %d\n", rc); |
0822f514 PS |
2207 | } |
2208 | ||
2209 | return rc; | |
2210 | } |