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: | |
85beff45 | 257 | rc = -EAGAIN; |
aa24d1e9 PS |
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); | |
32c36d88 PS |
411 | /* set it to the maximum buffer size value we can send with 1 credit */ |
412 | server->maxBuf = min_t(unsigned int, le32_to_cpu(rsp->MaxTransactSize), | |
413 | SMB2_MAX_BUFFER_SIZE); | |
ec2e4523 PS |
414 | server->max_read = le32_to_cpu(rsp->MaxReadSize); |
415 | server->max_write = le32_to_cpu(rsp->MaxWriteSize); | |
416 | /* BB Do we need to validate the SecurityMode? */ | |
417 | server->sec_mode = le16_to_cpu(rsp->SecurityMode); | |
418 | server->capabilities = le32_to_cpu(rsp->Capabilities); | |
29e20f9c PS |
419 | /* Internal types */ |
420 | server->capabilities |= SMB2_NT_FIND | SMB2_LARGE_FILES; | |
ec2e4523 PS |
421 | |
422 | security_blob = smb2_get_data_area_len(&blob_offset, &blob_length, | |
423 | &rsp->hdr); | |
424 | if (blob_length == 0) { | |
f96637be | 425 | cifs_dbg(VFS, "missing security blob on negprot\n"); |
ec2e4523 PS |
426 | rc = -EIO; |
427 | goto neg_exit; | |
428 | } | |
3c1bf7e4 | 429 | |
f96637be | 430 | cifs_dbg(FYI, "sec_flags 0x%x\n", sec_flags); |
52c0f4ad | 431 | if ((sec_flags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN) { |
f96637be | 432 | cifs_dbg(FYI, "Signing required\n"); |
3c1bf7e4 PS |
433 | if (!(server->sec_mode & (SMB2_NEGOTIATE_SIGNING_REQUIRED | |
434 | SMB2_NEGOTIATE_SIGNING_ENABLED))) { | |
f96637be | 435 | cifs_dbg(VFS, "signing required but server lacks support\n"); |
3c1bf7e4 PS |
436 | rc = -EOPNOTSUPP; |
437 | goto neg_exit; | |
438 | } | |
439 | server->sec_mode |= SECMODE_SIGN_REQUIRED; | |
440 | } else if (sec_flags & CIFSSEC_MAY_SIGN) { | |
f96637be | 441 | cifs_dbg(FYI, "Signing optional\n"); |
3c1bf7e4 | 442 | if (server->sec_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED) { |
f96637be | 443 | cifs_dbg(FYI, "Server requires signing\n"); |
3c1bf7e4 PS |
444 | server->sec_mode |= SECMODE_SIGN_REQUIRED; |
445 | } else { | |
446 | server->sec_mode &= | |
447 | ~(SECMODE_SIGN_ENABLED | SECMODE_SIGN_REQUIRED); | |
448 | } | |
449 | } else { | |
f96637be | 450 | cifs_dbg(FYI, "Signing disabled\n"); |
3c1bf7e4 | 451 | if (server->sec_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED) { |
f96637be | 452 | cifs_dbg(VFS, "Server requires packet signing to be enabled in /proc/fs/cifs/SecurityFlags\n"); |
3c1bf7e4 PS |
453 | rc = -EOPNOTSUPP; |
454 | goto neg_exit; | |
455 | } | |
456 | server->sec_mode &= | |
457 | ~(SECMODE_SIGN_ENABLED | SECMODE_SIGN_REQUIRED); | |
458 | } | |
459 | ||
ec2e4523 PS |
460 | #ifdef CONFIG_SMB2_ASN1 /* BB REMOVEME when updated asn1.c ready */ |
461 | rc = decode_neg_token_init(security_blob, blob_length, | |
462 | &server->sec_type); | |
463 | if (rc == 1) | |
464 | rc = 0; | |
465 | else if (rc == 0) { | |
466 | rc = -EIO; | |
467 | goto neg_exit; | |
468 | } | |
469 | #endif | |
470 | ||
471 | neg_exit: | |
472 | free_rsp_buf(resp_buftype, rsp); | |
473 | return rc; | |
474 | } | |
5478f9ba PS |
475 | |
476 | int | |
477 | SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses, | |
478 | const struct nls_table *nls_cp) | |
479 | { | |
480 | struct smb2_sess_setup_req *req; | |
481 | struct smb2_sess_setup_rsp *rsp = NULL; | |
482 | struct kvec iov[2]; | |
483 | int rc = 0; | |
484 | int resp_buftype; | |
485 | __le32 phase = NtLmNegotiate; /* NTLMSSP, if needed, is multistage */ | |
486 | struct TCP_Server_Info *server; | |
487 | unsigned int sec_flags; | |
488 | u8 temp = 0; | |
489 | u16 blob_length = 0; | |
490 | char *security_blob; | |
491 | char *ntlmssp_blob = NULL; | |
492 | bool use_spnego = false; /* else use raw ntlmssp */ | |
493 | ||
f96637be | 494 | cifs_dbg(FYI, "Session Setup\n"); |
5478f9ba PS |
495 | |
496 | if (ses->server) | |
497 | server = ses->server; | |
498 | else { | |
499 | rc = -EIO; | |
500 | return rc; | |
501 | } | |
502 | ||
503 | /* | |
504 | * If memory allocation is successful, caller of this function | |
505 | * frees it. | |
506 | */ | |
507 | ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL); | |
508 | if (!ses->ntlmssp) | |
509 | return -ENOMEM; | |
510 | ||
511 | ses->server->secType = RawNTLMSSP; | |
512 | ||
513 | ssetup_ntlmssp_authenticate: | |
514 | if (phase == NtLmChallenge) | |
515 | phase = NtLmAuthenticate; /* if ntlmssp, now final phase */ | |
516 | ||
517 | rc = small_smb2_init(SMB2_SESSION_SETUP, NULL, (void **) &req); | |
518 | if (rc) | |
519 | return rc; | |
520 | ||
521 | /* if any of auth flags (ie not sign or seal) are overriden use them */ | |
522 | if (ses->overrideSecFlg & (~(CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL))) | |
523 | sec_flags = ses->overrideSecFlg; /* BB FIXME fix sign flags?*/ | |
524 | else /* if override flags set only sign/seal OR them with global auth */ | |
525 | sec_flags = global_secflags | ses->overrideSecFlg; | |
526 | ||
f96637be | 527 | cifs_dbg(FYI, "sec_flags 0x%x\n", sec_flags); |
5478f9ba PS |
528 | |
529 | req->hdr.SessionId = 0; /* First session, not a reauthenticate */ | |
530 | req->VcNumber = 0; /* MBZ */ | |
531 | /* to enable echos and oplocks */ | |
532 | req->hdr.CreditRequest = cpu_to_le16(3); | |
533 | ||
534 | /* only one of SMB2 signing flags may be set in SMB2 request */ | |
535 | if ((sec_flags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN) | |
536 | temp = SMB2_NEGOTIATE_SIGNING_REQUIRED; | |
537 | else if (ses->server->sec_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED) | |
538 | temp = SMB2_NEGOTIATE_SIGNING_REQUIRED; | |
539 | else if (sec_flags & CIFSSEC_MAY_SIGN) /* MAY_SIGN is a single flag */ | |
540 | temp = SMB2_NEGOTIATE_SIGNING_ENABLED; | |
541 | ||
542 | req->SecurityMode = temp; | |
543 | req->Capabilities = 0; | |
544 | req->Channel = 0; /* MBZ */ | |
545 | ||
546 | iov[0].iov_base = (char *)req; | |
547 | /* 4 for rfc1002 length field and 1 for pad */ | |
548 | iov[0].iov_len = get_rfc1002_length(req) + 4 - 1; | |
549 | if (phase == NtLmNegotiate) { | |
550 | ntlmssp_blob = kmalloc(sizeof(struct _NEGOTIATE_MESSAGE), | |
551 | GFP_KERNEL); | |
552 | if (ntlmssp_blob == NULL) { | |
553 | rc = -ENOMEM; | |
554 | goto ssetup_exit; | |
555 | } | |
556 | build_ntlmssp_negotiate_blob(ntlmssp_blob, ses); | |
557 | if (use_spnego) { | |
558 | /* blob_length = build_spnego_ntlmssp_blob( | |
559 | &security_blob, | |
560 | sizeof(struct _NEGOTIATE_MESSAGE), | |
561 | ntlmssp_blob); */ | |
562 | /* BB eventually need to add this */ | |
f96637be | 563 | cifs_dbg(VFS, "spnego not supported for SMB2 yet\n"); |
5478f9ba PS |
564 | rc = -EOPNOTSUPP; |
565 | kfree(ntlmssp_blob); | |
566 | goto ssetup_exit; | |
567 | } else { | |
568 | blob_length = sizeof(struct _NEGOTIATE_MESSAGE); | |
569 | /* with raw NTLMSSP we don't encapsulate in SPNEGO */ | |
570 | security_blob = ntlmssp_blob; | |
571 | } | |
572 | } else if (phase == NtLmAuthenticate) { | |
573 | req->hdr.SessionId = ses->Suid; | |
574 | ntlmssp_blob = kzalloc(sizeof(struct _NEGOTIATE_MESSAGE) + 500, | |
575 | GFP_KERNEL); | |
576 | if (ntlmssp_blob == NULL) { | |
5478f9ba PS |
577 | rc = -ENOMEM; |
578 | goto ssetup_exit; | |
579 | } | |
580 | rc = build_ntlmssp_auth_blob(ntlmssp_blob, &blob_length, ses, | |
581 | nls_cp); | |
582 | if (rc) { | |
f96637be JP |
583 | cifs_dbg(FYI, "build_ntlmssp_auth_blob failed %d\n", |
584 | rc); | |
5478f9ba PS |
585 | goto ssetup_exit; /* BB double check error handling */ |
586 | } | |
587 | if (use_spnego) { | |
588 | /* blob_length = build_spnego_ntlmssp_blob( | |
589 | &security_blob, | |
590 | blob_length, | |
591 | ntlmssp_blob); */ | |
f96637be | 592 | cifs_dbg(VFS, "spnego not supported for SMB2 yet\n"); |
5478f9ba PS |
593 | rc = -EOPNOTSUPP; |
594 | kfree(ntlmssp_blob); | |
595 | goto ssetup_exit; | |
596 | } else { | |
597 | security_blob = ntlmssp_blob; | |
598 | } | |
599 | } else { | |
f96637be | 600 | cifs_dbg(VFS, "illegal ntlmssp phase\n"); |
5478f9ba PS |
601 | rc = -EIO; |
602 | goto ssetup_exit; | |
603 | } | |
604 | ||
605 | /* Testing shows that buffer offset must be at location of Buffer[0] */ | |
606 | req->SecurityBufferOffset = | |
607 | cpu_to_le16(sizeof(struct smb2_sess_setup_req) - | |
608 | 1 /* pad */ - 4 /* rfc1001 len */); | |
609 | req->SecurityBufferLength = cpu_to_le16(blob_length); | |
610 | iov[1].iov_base = security_blob; | |
611 | iov[1].iov_len = blob_length; | |
612 | ||
613 | inc_rfc1001_len(req, blob_length - 1 /* pad */); | |
614 | ||
615 | /* BB add code to build os and lm fields */ | |
616 | ||
6d8b59d7 SF |
617 | rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, |
618 | CIFS_LOG_ERROR | CIFS_NEG_OP); | |
5478f9ba PS |
619 | |
620 | kfree(security_blob); | |
621 | rsp = (struct smb2_sess_setup_rsp *)iov[0].iov_base; | |
4ca3a99c PS |
622 | if (resp_buftype != CIFS_NO_BUFFER && |
623 | rsp->hdr.Status == STATUS_MORE_PROCESSING_REQUIRED) { | |
5478f9ba | 624 | if (phase != NtLmNegotiate) { |
f96637be | 625 | cifs_dbg(VFS, "Unexpected more processing error\n"); |
5478f9ba PS |
626 | goto ssetup_exit; |
627 | } | |
628 | if (offsetof(struct smb2_sess_setup_rsp, Buffer) - 4 != | |
4ca3a99c | 629 | le16_to_cpu(rsp->SecurityBufferOffset)) { |
f96637be JP |
630 | cifs_dbg(VFS, "Invalid security buffer offset %d\n", |
631 | le16_to_cpu(rsp->SecurityBufferOffset)); | |
5478f9ba PS |
632 | rc = -EIO; |
633 | goto ssetup_exit; | |
634 | } | |
635 | ||
636 | /* NTLMSSP Negotiate sent now processing challenge (response) */ | |
637 | phase = NtLmChallenge; /* process ntlmssp challenge */ | |
638 | rc = 0; /* MORE_PROCESSING is not an error here but expected */ | |
639 | ses->Suid = rsp->hdr.SessionId; | |
640 | rc = decode_ntlmssp_challenge(rsp->Buffer, | |
641 | le16_to_cpu(rsp->SecurityBufferLength), ses); | |
642 | } | |
643 | ||
644 | /* | |
645 | * BB eventually add code for SPNEGO decoding of NtlmChallenge blob, | |
646 | * but at least the raw NTLMSSP case works. | |
647 | */ | |
648 | /* | |
649 | * No tcon so can't do | |
650 | * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]); | |
651 | */ | |
652 | if (rc != 0) | |
653 | goto ssetup_exit; | |
654 | ||
5478f9ba PS |
655 | ses->session_flags = le16_to_cpu(rsp->SessionFlags); |
656 | ssetup_exit: | |
657 | free_rsp_buf(resp_buftype, rsp); | |
658 | ||
659 | /* if ntlmssp, and negotiate succeeded, proceed to authenticate phase */ | |
660 | if ((phase == NtLmChallenge) && (rc == 0)) | |
661 | goto ssetup_ntlmssp_authenticate; | |
662 | return rc; | |
663 | } | |
664 | ||
665 | int | |
666 | SMB2_logoff(const unsigned int xid, struct cifs_ses *ses) | |
667 | { | |
668 | struct smb2_logoff_req *req; /* response is also trivial struct */ | |
669 | int rc = 0; | |
670 | struct TCP_Server_Info *server; | |
671 | ||
f96637be | 672 | cifs_dbg(FYI, "disconnect session %p\n", ses); |
5478f9ba PS |
673 | |
674 | if (ses && (ses->server)) | |
675 | server = ses->server; | |
676 | else | |
677 | return -EIO; | |
678 | ||
679 | rc = small_smb2_init(SMB2_LOGOFF, NULL, (void **) &req); | |
680 | if (rc) | |
681 | return rc; | |
682 | ||
683 | /* since no tcon, smb2_init can not do this, so do here */ | |
684 | req->hdr.SessionId = ses->Suid; | |
3c1bf7e4 PS |
685 | if (server->sec_mode & SECMODE_SIGN_REQUIRED) |
686 | req->hdr.Flags |= SMB2_FLAGS_SIGNED; | |
5478f9ba PS |
687 | |
688 | rc = SendReceiveNoRsp(xid, ses, (char *) &req->hdr, 0); | |
689 | /* | |
690 | * No tcon so can't do | |
691 | * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]); | |
692 | */ | |
693 | return rc; | |
694 | } | |
faaf946a PS |
695 | |
696 | static inline void cifs_stats_fail_inc(struct cifs_tcon *tcon, uint16_t code) | |
697 | { | |
d60622eb | 698 | cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_failed[code]); |
faaf946a PS |
699 | } |
700 | ||
701 | #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */) | |
702 | ||
703 | int | |
704 | SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree, | |
705 | struct cifs_tcon *tcon, const struct nls_table *cp) | |
706 | { | |
707 | struct smb2_tree_connect_req *req; | |
708 | struct smb2_tree_connect_rsp *rsp = NULL; | |
709 | struct kvec iov[2]; | |
710 | int rc = 0; | |
711 | int resp_buftype; | |
712 | int unc_path_len; | |
713 | struct TCP_Server_Info *server; | |
714 | __le16 *unc_path = NULL; | |
715 | ||
f96637be | 716 | cifs_dbg(FYI, "TCON\n"); |
faaf946a PS |
717 | |
718 | if ((ses->server) && tree) | |
719 | server = ses->server; | |
720 | else | |
721 | return -EIO; | |
722 | ||
faaf946a PS |
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 | ||
903377e0 JMG |
734 | /* SMB2 TREE_CONNECT request must be called with TreeId == 0 */ |
735 | if (tcon) | |
736 | tcon->tid = 0; | |
737 | ||
faaf946a PS |
738 | rc = small_smb2_init(SMB2_TREE_CONNECT, tcon, (void **) &req); |
739 | if (rc) { | |
740 | kfree(unc_path); | |
741 | return rc; | |
742 | } | |
743 | ||
744 | if (tcon == NULL) { | |
745 | /* since no tcon, smb2_init can not do this, so do here */ | |
746 | req->hdr.SessionId = ses->Suid; | |
747 | /* if (ses->server->sec_mode & SECMODE_SIGN_REQUIRED) | |
748 | req->hdr.Flags |= SMB2_FLAGS_SIGNED; */ | |
749 | } | |
750 | ||
751 | iov[0].iov_base = (char *)req; | |
752 | /* 4 for rfc1002 length field and 1 for pad */ | |
753 | iov[0].iov_len = get_rfc1002_length(req) + 4 - 1; | |
754 | ||
755 | /* Testing shows that buffer offset must be at location of Buffer[0] */ | |
756 | req->PathOffset = cpu_to_le16(sizeof(struct smb2_tree_connect_req) | |
757 | - 1 /* pad */ - 4 /* do not count rfc1001 len field */); | |
758 | req->PathLength = cpu_to_le16(unc_path_len - 2); | |
759 | iov[1].iov_base = unc_path; | |
760 | iov[1].iov_len = unc_path_len; | |
761 | ||
762 | inc_rfc1001_len(req, unc_path_len - 1 /* pad */); | |
763 | ||
764 | rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, 0); | |
765 | rsp = (struct smb2_tree_connect_rsp *)iov[0].iov_base; | |
766 | ||
767 | if (rc != 0) { | |
768 | if (tcon) { | |
769 | cifs_stats_fail_inc(tcon, SMB2_TREE_CONNECT_HE); | |
770 | tcon->need_reconnect = true; | |
771 | } | |
772 | goto tcon_error_exit; | |
773 | } | |
774 | ||
faaf946a PS |
775 | if (tcon == NULL) { |
776 | ses->ipc_tid = rsp->hdr.TreeId; | |
777 | goto tcon_exit; | |
778 | } | |
779 | ||
780 | if (rsp->ShareType & SMB2_SHARE_TYPE_DISK) | |
f96637be | 781 | cifs_dbg(FYI, "connection to disk share\n"); |
faaf946a PS |
782 | else if (rsp->ShareType & SMB2_SHARE_TYPE_PIPE) { |
783 | tcon->ipc = true; | |
f96637be | 784 | cifs_dbg(FYI, "connection to pipe share\n"); |
faaf946a PS |
785 | } else if (rsp->ShareType & SMB2_SHARE_TYPE_PRINT) { |
786 | tcon->print = true; | |
f96637be | 787 | cifs_dbg(FYI, "connection to printer\n"); |
faaf946a | 788 | } else { |
f96637be | 789 | cifs_dbg(VFS, "unknown share type %d\n", rsp->ShareType); |
faaf946a PS |
790 | rc = -EOPNOTSUPP; |
791 | goto tcon_error_exit; | |
792 | } | |
793 | ||
794 | tcon->share_flags = le32_to_cpu(rsp->ShareFlags); | |
795 | tcon->maximal_access = le32_to_cpu(rsp->MaximalAccess); | |
796 | tcon->tidStatus = CifsGood; | |
797 | tcon->need_reconnect = false; | |
798 | tcon->tid = rsp->hdr.TreeId; | |
799 | strncpy(tcon->treeName, tree, MAX_TREE_SIZE); | |
800 | ||
801 | if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) && | |
802 | ((tcon->share_flags & SHI1005_FLAGS_DFS) == 0)) | |
f96637be | 803 | cifs_dbg(VFS, "DFS capability contradicts DFS flag\n"); |
faaf946a PS |
804 | |
805 | tcon_exit: | |
806 | free_rsp_buf(resp_buftype, rsp); | |
807 | kfree(unc_path); | |
808 | return rc; | |
809 | ||
810 | tcon_error_exit: | |
811 | if (rsp->hdr.Status == STATUS_BAD_NETWORK_NAME) { | |
f96637be | 812 | cifs_dbg(VFS, "BAD_NETWORK_NAME: %s\n", tree); |
faaf946a PS |
813 | } |
814 | goto tcon_exit; | |
815 | } | |
816 | ||
817 | int | |
818 | SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon) | |
819 | { | |
820 | struct smb2_tree_disconnect_req *req; /* response is trivial */ | |
821 | int rc = 0; | |
822 | struct TCP_Server_Info *server; | |
823 | struct cifs_ses *ses = tcon->ses; | |
824 | ||
f96637be | 825 | cifs_dbg(FYI, "Tree Disconnect\n"); |
faaf946a PS |
826 | |
827 | if (ses && (ses->server)) | |
828 | server = ses->server; | |
829 | else | |
830 | return -EIO; | |
831 | ||
832 | if ((tcon->need_reconnect) || (tcon->ses->need_reconnect)) | |
833 | return 0; | |
834 | ||
835 | rc = small_smb2_init(SMB2_TREE_DISCONNECT, tcon, (void **) &req); | |
836 | if (rc) | |
837 | return rc; | |
838 | ||
839 | rc = SendReceiveNoRsp(xid, ses, (char *)&req->hdr, 0); | |
840 | if (rc) | |
841 | cifs_stats_fail_inc(tcon, SMB2_TREE_DISCONNECT_HE); | |
842 | ||
843 | return rc; | |
844 | } | |
2503a0db | 845 | |
b8c32dbb PS |
846 | static struct create_lease * |
847 | create_lease_buf(u8 *lease_key, u8 oplock) | |
848 | { | |
849 | struct create_lease *buf; | |
850 | ||
d455b72b | 851 | buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL); |
b8c32dbb PS |
852 | if (!buf) |
853 | return NULL; | |
854 | ||
b8c32dbb PS |
855 | buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key)); |
856 | buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8))); | |
857 | if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) | |
858 | buf->lcontext.LeaseState = SMB2_LEASE_WRITE_CACHING | | |
859 | SMB2_LEASE_READ_CACHING; | |
860 | else if (oplock == SMB2_OPLOCK_LEVEL_II) | |
861 | buf->lcontext.LeaseState = SMB2_LEASE_READ_CACHING; | |
862 | else if (oplock == SMB2_OPLOCK_LEVEL_BATCH) | |
863 | buf->lcontext.LeaseState = SMB2_LEASE_HANDLE_CACHING | | |
864 | SMB2_LEASE_READ_CACHING | | |
865 | SMB2_LEASE_WRITE_CACHING; | |
866 | ||
867 | buf->ccontext.DataOffset = cpu_to_le16(offsetof | |
868 | (struct create_lease, lcontext)); | |
869 | buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context)); | |
870 | buf->ccontext.NameOffset = cpu_to_le16(offsetof | |
871 | (struct create_lease, Name)); | |
872 | buf->ccontext.NameLength = cpu_to_le16(4); | |
873 | buf->Name[0] = 'R'; | |
874 | buf->Name[1] = 'q'; | |
875 | buf->Name[2] = 'L'; | |
876 | buf->Name[3] = 's'; | |
877 | return buf; | |
878 | } | |
879 | ||
880 | static __u8 | |
881 | parse_lease_state(struct smb2_create_rsp *rsp) | |
882 | { | |
883 | char *data_offset; | |
884 | struct create_lease *lc; | |
b8c32dbb PS |
885 | bool found = false; |
886 | ||
887 | data_offset = (char *)rsp; | |
888 | data_offset += 4 + le32_to_cpu(rsp->CreateContextsOffset); | |
889 | lc = (struct create_lease *)data_offset; | |
890 | do { | |
891 | char *name = le16_to_cpu(lc->ccontext.NameOffset) + (char *)lc; | |
892 | if (le16_to_cpu(lc->ccontext.NameLength) != 4 || | |
893 | strncmp(name, "RqLs", 4)) { | |
894 | lc = (struct create_lease *)((char *)lc | |
895 | + le32_to_cpu(lc->ccontext.Next)); | |
896 | continue; | |
897 | } | |
898 | if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS) | |
899 | return SMB2_OPLOCK_LEVEL_NOCHANGE; | |
900 | found = true; | |
901 | break; | |
902 | } while (le32_to_cpu(lc->ccontext.Next) != 0); | |
903 | ||
904 | if (!found) | |
0822f514 | 905 | return 0; |
b8c32dbb | 906 | |
0822f514 | 907 | return smb2_map_lease_to_oplock(lc->lcontext.LeaseState); |
b8c32dbb PS |
908 | } |
909 | ||
2503a0db PS |
910 | int |
911 | SMB2_open(const unsigned int xid, struct cifs_tcon *tcon, __le16 *path, | |
912 | u64 *persistent_fid, u64 *volatile_fid, __u32 desired_access, | |
f0df737e | 913 | __u32 create_disposition, __u32 file_attributes, __u32 create_options, |
2e44b288 | 914 | __u8 *oplock, struct smb2_file_all_info *buf) |
2503a0db PS |
915 | { |
916 | struct smb2_create_req *req; | |
917 | struct smb2_create_rsp *rsp; | |
918 | struct TCP_Server_Info *server; | |
919 | struct cifs_ses *ses = tcon->ses; | |
b8c32dbb | 920 | struct kvec iov[3]; |
2503a0db PS |
921 | int resp_buftype; |
922 | int uni_path_len; | |
b8c32dbb PS |
923 | __le16 *copy_path = NULL; |
924 | int copy_size; | |
2503a0db PS |
925 | int rc = 0; |
926 | int num_iovecs = 2; | |
927 | ||
f96637be | 928 | cifs_dbg(FYI, "create/open\n"); |
2503a0db PS |
929 | |
930 | if (ses && (ses->server)) | |
931 | server = ses->server; | |
932 | else | |
933 | return -EIO; | |
934 | ||
935 | rc = small_smb2_init(SMB2_CREATE, tcon, (void **) &req); | |
936 | if (rc) | |
937 | return rc; | |
938 | ||
2503a0db PS |
939 | req->ImpersonationLevel = IL_IMPERSONATION; |
940 | req->DesiredAccess = cpu_to_le32(desired_access); | |
941 | /* File attributes ignored on open (used in create though) */ | |
942 | req->FileAttributes = cpu_to_le32(file_attributes); | |
943 | req->ShareAccess = FILE_SHARE_ALL_LE; | |
944 | req->CreateDisposition = cpu_to_le32(create_disposition); | |
945 | req->CreateOptions = cpu_to_le32(create_options); | |
946 | uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2; | |
947 | req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req) | |
b8c32dbb | 948 | - 8 /* pad */ - 4 /* do not count rfc1001 len field */); |
2503a0db PS |
949 | |
950 | iov[0].iov_base = (char *)req; | |
951 | /* 4 for rfc1002 length field */ | |
952 | iov[0].iov_len = get_rfc1002_length(req) + 4; | |
953 | ||
954 | /* MUST set path len (NameLength) to 0 opening root of share */ | |
955 | if (uni_path_len >= 4) { | |
956 | req->NameLength = cpu_to_le16(uni_path_len - 2); | |
957 | /* -1 since last byte is buf[0] which is sent below (path) */ | |
958 | iov[0].iov_len--; | |
b8c32dbb PS |
959 | if (uni_path_len % 8 != 0) { |
960 | copy_size = uni_path_len / 8 * 8; | |
961 | if (copy_size < uni_path_len) | |
962 | copy_size += 8; | |
963 | ||
964 | copy_path = kzalloc(copy_size, GFP_KERNEL); | |
965 | if (!copy_path) | |
966 | return -ENOMEM; | |
967 | memcpy((char *)copy_path, (const char *)path, | |
968 | uni_path_len); | |
969 | uni_path_len = copy_size; | |
970 | path = copy_path; | |
971 | } | |
972 | ||
2503a0db PS |
973 | iov[1].iov_len = uni_path_len; |
974 | iov[1].iov_base = path; | |
975 | /* | |
976 | * -1 since last byte is buf[0] which was counted in | |
977 | * smb2_buf_len. | |
978 | */ | |
979 | inc_rfc1001_len(req, uni_path_len - 1); | |
980 | } else { | |
b8c32dbb PS |
981 | iov[0].iov_len += 7; |
982 | req->hdr.smb2_buf_length = cpu_to_be32(be32_to_cpu( | |
983 | req->hdr.smb2_buf_length) + 8 - 1); | |
2503a0db PS |
984 | num_iovecs = 1; |
985 | req->NameLength = 0; | |
986 | } | |
987 | ||
b8c32dbb PS |
988 | if (!server->oplocks) |
989 | *oplock = SMB2_OPLOCK_LEVEL_NONE; | |
990 | ||
991 | if (!(tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING) || | |
992 | *oplock == SMB2_OPLOCK_LEVEL_NONE) | |
993 | req->RequestedOplockLevel = *oplock; | |
994 | else { | |
995 | iov[num_iovecs].iov_base = create_lease_buf(oplock+1, *oplock); | |
996 | if (iov[num_iovecs].iov_base == NULL) { | |
997 | cifs_small_buf_release(req); | |
998 | kfree(copy_path); | |
999 | return -ENOMEM; | |
1000 | } | |
1001 | iov[num_iovecs].iov_len = sizeof(struct create_lease); | |
1002 | req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_LEASE; | |
1003 | req->CreateContextsOffset = cpu_to_le32( | |
1004 | sizeof(struct smb2_create_req) - 4 - 8 + | |
1005 | iov[num_iovecs-1].iov_len); | |
1006 | req->CreateContextsLength = cpu_to_le32( | |
1007 | sizeof(struct create_lease)); | |
1008 | inc_rfc1001_len(&req->hdr, sizeof(struct create_lease)); | |
1009 | num_iovecs++; | |
1010 | } | |
1011 | ||
2503a0db PS |
1012 | rc = SendReceive2(xid, ses, iov, num_iovecs, &resp_buftype, 0); |
1013 | rsp = (struct smb2_create_rsp *)iov[0].iov_base; | |
1014 | ||
1015 | if (rc != 0) { | |
1016 | cifs_stats_fail_inc(tcon, SMB2_CREATE_HE); | |
1017 | goto creat_exit; | |
1018 | } | |
1019 | ||
2503a0db PS |
1020 | *persistent_fid = rsp->PersistentFileId; |
1021 | *volatile_fid = rsp->VolatileFileId; | |
f0df737e PS |
1022 | |
1023 | if (buf) { | |
1024 | memcpy(buf, &rsp->CreationTime, 32); | |
1025 | buf->AllocationSize = rsp->AllocationSize; | |
1026 | buf->EndOfFile = rsp->EndofFile; | |
1027 | buf->Attributes = rsp->FileAttributes; | |
1028 | buf->NumberOfLinks = cpu_to_le32(1); | |
1029 | buf->DeletePending = 0; | |
1030 | } | |
2e44b288 | 1031 | |
b8c32dbb PS |
1032 | if (rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE) |
1033 | *oplock = parse_lease_state(rsp); | |
1034 | else | |
1035 | *oplock = rsp->OplockLevel; | |
2503a0db | 1036 | creat_exit: |
b8c32dbb | 1037 | kfree(copy_path); |
2503a0db PS |
1038 | free_rsp_buf(resp_buftype, rsp); |
1039 | return rc; | |
1040 | } | |
1041 | ||
1042 | int | |
1043 | SMB2_close(const unsigned int xid, struct cifs_tcon *tcon, | |
1044 | u64 persistent_fid, u64 volatile_fid) | |
1045 | { | |
1046 | struct smb2_close_req *req; | |
1047 | struct smb2_close_rsp *rsp; | |
1048 | struct TCP_Server_Info *server; | |
1049 | struct cifs_ses *ses = tcon->ses; | |
1050 | struct kvec iov[1]; | |
1051 | int resp_buftype; | |
1052 | int rc = 0; | |
1053 | ||
f96637be | 1054 | cifs_dbg(FYI, "Close\n"); |
2503a0db PS |
1055 | |
1056 | if (ses && (ses->server)) | |
1057 | server = ses->server; | |
1058 | else | |
1059 | return -EIO; | |
1060 | ||
1061 | rc = small_smb2_init(SMB2_CLOSE, tcon, (void **) &req); | |
1062 | if (rc) | |
1063 | return rc; | |
1064 | ||
1065 | req->PersistentFileId = persistent_fid; | |
1066 | req->VolatileFileId = volatile_fid; | |
1067 | ||
1068 | iov[0].iov_base = (char *)req; | |
1069 | /* 4 for rfc1002 length field */ | |
1070 | iov[0].iov_len = get_rfc1002_length(req) + 4; | |
1071 | ||
1072 | rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0); | |
1073 | rsp = (struct smb2_close_rsp *)iov[0].iov_base; | |
1074 | ||
1075 | if (rc != 0) { | |
1076 | if (tcon) | |
1077 | cifs_stats_fail_inc(tcon, SMB2_CLOSE_HE); | |
1078 | goto close_exit; | |
1079 | } | |
1080 | ||
2503a0db PS |
1081 | /* BB FIXME - decode close response, update inode for caching */ |
1082 | ||
1083 | close_exit: | |
1084 | free_rsp_buf(resp_buftype, rsp); | |
1085 | return rc; | |
1086 | } | |
be4cb9e3 PS |
1087 | |
1088 | static int | |
1089 | validate_buf(unsigned int offset, unsigned int buffer_length, | |
1090 | struct smb2_hdr *hdr, unsigned int min_buf_size) | |
1091 | ||
1092 | { | |
1093 | unsigned int smb_len = be32_to_cpu(hdr->smb2_buf_length); | |
1094 | char *end_of_smb = smb_len + 4 /* RFC1001 length field */ + (char *)hdr; | |
1095 | char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr; | |
1096 | char *end_of_buf = begin_of_buf + buffer_length; | |
1097 | ||
1098 | ||
1099 | if (buffer_length < min_buf_size) { | |
f96637be JP |
1100 | cifs_dbg(VFS, "buffer length %d smaller than minimum size %d\n", |
1101 | buffer_length, min_buf_size); | |
be4cb9e3 PS |
1102 | return -EINVAL; |
1103 | } | |
1104 | ||
1105 | /* check if beyond RFC1001 maximum length */ | |
1106 | if ((smb_len > 0x7FFFFF) || (buffer_length > 0x7FFFFF)) { | |
f96637be JP |
1107 | cifs_dbg(VFS, "buffer length %d or smb length %d too large\n", |
1108 | buffer_length, smb_len); | |
be4cb9e3 PS |
1109 | return -EINVAL; |
1110 | } | |
1111 | ||
1112 | if ((begin_of_buf > end_of_smb) || (end_of_buf > end_of_smb)) { | |
f96637be | 1113 | cifs_dbg(VFS, "illegal server response, bad offset to data\n"); |
be4cb9e3 PS |
1114 | return -EINVAL; |
1115 | } | |
1116 | ||
1117 | return 0; | |
1118 | } | |
1119 | ||
1120 | /* | |
1121 | * If SMB buffer fields are valid, copy into temporary buffer to hold result. | |
1122 | * Caller must free buffer. | |
1123 | */ | |
1124 | static int | |
1125 | validate_and_copy_buf(unsigned int offset, unsigned int buffer_length, | |
1126 | struct smb2_hdr *hdr, unsigned int minbufsize, | |
1127 | char *data) | |
1128 | ||
1129 | { | |
1130 | char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr; | |
1131 | int rc; | |
1132 | ||
1133 | if (!data) | |
1134 | return -EINVAL; | |
1135 | ||
1136 | rc = validate_buf(offset, buffer_length, hdr, minbufsize); | |
1137 | if (rc) | |
1138 | return rc; | |
1139 | ||
1140 | memcpy(data, begin_of_buf, buffer_length); | |
1141 | ||
1142 | return 0; | |
1143 | } | |
1144 | ||
f0df737e PS |
1145 | static int |
1146 | query_info(const unsigned int xid, struct cifs_tcon *tcon, | |
1147 | u64 persistent_fid, u64 volatile_fid, u8 info_class, | |
1148 | size_t output_len, size_t min_len, void *data) | |
be4cb9e3 PS |
1149 | { |
1150 | struct smb2_query_info_req *req; | |
1151 | struct smb2_query_info_rsp *rsp = NULL; | |
1152 | struct kvec iov[2]; | |
1153 | int rc = 0; | |
1154 | int resp_buftype; | |
1155 | struct TCP_Server_Info *server; | |
1156 | struct cifs_ses *ses = tcon->ses; | |
1157 | ||
f96637be | 1158 | cifs_dbg(FYI, "Query Info\n"); |
be4cb9e3 PS |
1159 | |
1160 | if (ses && (ses->server)) | |
1161 | server = ses->server; | |
1162 | else | |
1163 | return -EIO; | |
1164 | ||
1165 | rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req); | |
1166 | if (rc) | |
1167 | return rc; | |
1168 | ||
1169 | req->InfoType = SMB2_O_INFO_FILE; | |
f0df737e | 1170 | req->FileInfoClass = info_class; |
be4cb9e3 PS |
1171 | req->PersistentFileId = persistent_fid; |
1172 | req->VolatileFileId = volatile_fid; | |
1173 | /* 4 for rfc1002 length field and 1 for Buffer */ | |
1174 | req->InputBufferOffset = | |
1175 | cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4); | |
f0df737e | 1176 | req->OutputBufferLength = cpu_to_le32(output_len); |
be4cb9e3 PS |
1177 | |
1178 | iov[0].iov_base = (char *)req; | |
1179 | /* 4 for rfc1002 length field */ | |
1180 | iov[0].iov_len = get_rfc1002_length(req) + 4; | |
1181 | ||
1182 | rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0); | |
e5d04887 PS |
1183 | rsp = (struct smb2_query_info_rsp *)iov[0].iov_base; |
1184 | ||
be4cb9e3 PS |
1185 | if (rc) { |
1186 | cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE); | |
1187 | goto qinf_exit; | |
1188 | } | |
1189 | ||
be4cb9e3 PS |
1190 | rc = validate_and_copy_buf(le16_to_cpu(rsp->OutputBufferOffset), |
1191 | le32_to_cpu(rsp->OutputBufferLength), | |
f0df737e | 1192 | &rsp->hdr, min_len, data); |
be4cb9e3 PS |
1193 | |
1194 | qinf_exit: | |
1195 | free_rsp_buf(resp_buftype, rsp); | |
1196 | return rc; | |
1197 | } | |
9094fad1 | 1198 | |
f0df737e PS |
1199 | int |
1200 | SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon, | |
1201 | u64 persistent_fid, u64 volatile_fid, | |
1202 | struct smb2_file_all_info *data) | |
1203 | { | |
1204 | return query_info(xid, tcon, persistent_fid, volatile_fid, | |
1205 | FILE_ALL_INFORMATION, | |
0c17ceb6 | 1206 | sizeof(struct smb2_file_all_info) + PATH_MAX * 2, |
f0df737e PS |
1207 | sizeof(struct smb2_file_all_info), data); |
1208 | } | |
1209 | ||
1210 | int | |
1211 | SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon, | |
1212 | u64 persistent_fid, u64 volatile_fid, __le64 *uniqueid) | |
1213 | { | |
1214 | return query_info(xid, tcon, persistent_fid, volatile_fid, | |
1215 | FILE_INTERNAL_INFORMATION, | |
1216 | sizeof(struct smb2_file_internal_info), | |
1217 | sizeof(struct smb2_file_internal_info), uniqueid); | |
1218 | } | |
1219 | ||
9094fad1 PS |
1220 | /* |
1221 | * This is a no-op for now. We're not really interested in the reply, but | |
1222 | * rather in the fact that the server sent one and that server->lstrp | |
1223 | * gets updated. | |
1224 | * | |
1225 | * FIXME: maybe we should consider checking that the reply matches request? | |
1226 | */ | |
1227 | static void | |
1228 | smb2_echo_callback(struct mid_q_entry *mid) | |
1229 | { | |
1230 | struct TCP_Server_Info *server = mid->callback_data; | |
1231 | struct smb2_echo_rsp *smb2 = (struct smb2_echo_rsp *)mid->resp_buf; | |
1232 | unsigned int credits_received = 1; | |
1233 | ||
1234 | if (mid->mid_state == MID_RESPONSE_RECEIVED) | |
1235 | credits_received = le16_to_cpu(smb2->hdr.CreditRequest); | |
1236 | ||
1237 | DeleteMidQEntry(mid); | |
1238 | add_credits(server, credits_received, CIFS_ECHO_OP); | |
1239 | } | |
1240 | ||
e008a962 PS |
1241 | void smb2_reconnect_server(struct work_struct *work) |
1242 | { | |
1243 | struct TCP_Server_Info *server = container_of(work, | |
1244 | struct TCP_Server_Info, reconnect.work); | |
1245 | struct cifs_ses *ses; | |
1246 | struct cifs_tcon *tcon, *tcon2; | |
1247 | struct list_head tmp_list; | |
1248 | int tcon_exist = false; | |
1249 | ||
1250 | /* Prevent simultaneous reconnects that can corrupt tcon->rlist list */ | |
1251 | mutex_lock(&server->reconnect_mutex); | |
1252 | ||
1253 | INIT_LIST_HEAD(&tmp_list); | |
1254 | cifs_dbg(FYI, "Need negotiate, reconnecting tcons\n"); | |
1255 | ||
1256 | spin_lock(&cifs_tcp_ses_lock); | |
1257 | list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) { | |
1258 | list_for_each_entry(tcon, &ses->tcon_list, tcon_list) { | |
1259 | if (tcon->need_reconnect) { | |
1260 | tcon->tc_count++; | |
1261 | list_add_tail(&tcon->rlist, &tmp_list); | |
1262 | tcon_exist = true; | |
1263 | } | |
1264 | } | |
1265 | } | |
1266 | /* | |
1267 | * Get the reference to server struct to be sure that the last call of | |
1268 | * cifs_put_tcon() in the loop below won't release the server pointer. | |
1269 | */ | |
1270 | if (tcon_exist) | |
1271 | server->srv_count++; | |
1272 | ||
1273 | spin_unlock(&cifs_tcp_ses_lock); | |
1274 | ||
1275 | list_for_each_entry_safe(tcon, tcon2, &tmp_list, rlist) { | |
1276 | smb2_reconnect(SMB2_ECHO, tcon); | |
1277 | list_del_init(&tcon->rlist); | |
1278 | cifs_put_tcon(tcon); | |
1279 | } | |
1280 | ||
1281 | cifs_dbg(FYI, "Reconnecting tcons finished\n"); | |
1282 | mutex_unlock(&server->reconnect_mutex); | |
1283 | ||
1284 | /* now we can safely release srv struct */ | |
1285 | if (tcon_exist) | |
1286 | cifs_put_tcp_session(server, 1); | |
1287 | } | |
1288 | ||
9094fad1 PS |
1289 | int |
1290 | SMB2_echo(struct TCP_Server_Info *server) | |
1291 | { | |
1292 | struct smb2_echo_req *req; | |
1293 | int rc = 0; | |
1294 | struct kvec iov; | |
fec344e3 JL |
1295 | struct smb_rqst rqst = { .rq_iov = &iov, |
1296 | .rq_nvec = 1 }; | |
9094fad1 | 1297 | |
f96637be | 1298 | cifs_dbg(FYI, "In echo request\n"); |
9094fad1 | 1299 | |
655e0c06 | 1300 | if (server->tcpStatus == CifsNeedNegotiate) { |
e008a962 PS |
1301 | /* No need to send echo on newly established connections */ |
1302 | queue_delayed_work(cifsiod_wq, &server->reconnect, 0); | |
1303 | return rc; | |
655e0c06 SF |
1304 | } |
1305 | ||
9094fad1 PS |
1306 | rc = small_smb2_init(SMB2_ECHO, NULL, (void **)&req); |
1307 | if (rc) | |
1308 | return rc; | |
1309 | ||
1310 | req->hdr.CreditRequest = cpu_to_le16(1); | |
1311 | ||
1312 | iov.iov_base = (char *)req; | |
1313 | /* 4 for rfc1002 length field */ | |
1314 | iov.iov_len = get_rfc1002_length(req) + 4; | |
1315 | ||
fec344e3 | 1316 | rc = cifs_call_async(server, &rqst, NULL, smb2_echo_callback, server, |
9094fad1 PS |
1317 | CIFS_ECHO_OP); |
1318 | if (rc) | |
f96637be | 1319 | cifs_dbg(FYI, "Echo request failed: %d\n", rc); |
9094fad1 PS |
1320 | |
1321 | cifs_small_buf_release(req); | |
1322 | return rc; | |
1323 | } | |
7a5cfb19 PS |
1324 | |
1325 | int | |
1326 | SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, | |
1327 | u64 volatile_fid) | |
1328 | { | |
1329 | struct smb2_flush_req *req; | |
1330 | struct TCP_Server_Info *server; | |
1331 | struct cifs_ses *ses = tcon->ses; | |
1332 | struct kvec iov[1]; | |
1333 | int resp_buftype; | |
1334 | int rc = 0; | |
1335 | ||
f96637be | 1336 | cifs_dbg(FYI, "Flush\n"); |
7a5cfb19 PS |
1337 | |
1338 | if (ses && (ses->server)) | |
1339 | server = ses->server; | |
1340 | else | |
1341 | return -EIO; | |
1342 | ||
1343 | rc = small_smb2_init(SMB2_FLUSH, tcon, (void **) &req); | |
1344 | if (rc) | |
1345 | return rc; | |
1346 | ||
1347 | req->PersistentFileId = persistent_fid; | |
1348 | req->VolatileFileId = volatile_fid; | |
1349 | ||
1350 | iov[0].iov_base = (char *)req; | |
1351 | /* 4 for rfc1002 length field */ | |
1352 | iov[0].iov_len = get_rfc1002_length(req) + 4; | |
1353 | ||
1354 | rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0); | |
1355 | ||
1356 | if ((rc != 0) && tcon) | |
1357 | cifs_stats_fail_inc(tcon, SMB2_FLUSH_HE); | |
1358 | ||
1359 | free_rsp_buf(resp_buftype, iov[0].iov_base); | |
1360 | return rc; | |
1361 | } | |
09a4707e PS |
1362 | |
1363 | /* | |
1364 | * To form a chain of read requests, any read requests after the first should | |
1365 | * have the end_of_chain boolean set to true. | |
1366 | */ | |
1367 | static int | |
1368 | smb2_new_read_req(struct kvec *iov, struct cifs_io_parms *io_parms, | |
1369 | unsigned int remaining_bytes, int request_type) | |
1370 | { | |
1371 | int rc = -EACCES; | |
1372 | struct smb2_read_req *req = NULL; | |
1373 | ||
1374 | rc = small_smb2_init(SMB2_READ, io_parms->tcon, (void **) &req); | |
1375 | if (rc) | |
1376 | return rc; | |
1377 | if (io_parms->tcon->ses->server == NULL) | |
1378 | return -ECONNABORTED; | |
1379 | ||
1380 | req->hdr.ProcessId = cpu_to_le32(io_parms->pid); | |
1381 | ||
1382 | req->PersistentFileId = io_parms->persistent_fid; | |
1383 | req->VolatileFileId = io_parms->volatile_fid; | |
1384 | req->ReadChannelInfoOffset = 0; /* reserved */ | |
1385 | req->ReadChannelInfoLength = 0; /* reserved */ | |
1386 | req->Channel = 0; /* reserved */ | |
1387 | req->MinimumCount = 0; | |
1388 | req->Length = cpu_to_le32(io_parms->length); | |
1389 | req->Offset = cpu_to_le64(io_parms->offset); | |
1390 | ||
1391 | if (request_type & CHAINED_REQUEST) { | |
1392 | if (!(request_type & END_OF_CHAIN)) { | |
1393 | /* 4 for rfc1002 length field */ | |
1394 | req->hdr.NextCommand = | |
1395 | cpu_to_le32(get_rfc1002_length(req) + 4); | |
1396 | } else /* END_OF_CHAIN */ | |
1397 | req->hdr.NextCommand = 0; | |
1398 | if (request_type & RELATED_REQUEST) { | |
1399 | req->hdr.Flags |= SMB2_FLAGS_RELATED_OPERATIONS; | |
1400 | /* | |
1401 | * Related requests use info from previous read request | |
1402 | * in chain. | |
1403 | */ | |
1404 | req->hdr.SessionId = 0xFFFFFFFF; | |
1405 | req->hdr.TreeId = 0xFFFFFFFF; | |
1406 | req->PersistentFileId = 0xFFFFFFFF; | |
1407 | req->VolatileFileId = 0xFFFFFFFF; | |
1408 | } | |
1409 | } | |
1410 | if (remaining_bytes > io_parms->length) | |
1411 | req->RemainingBytes = cpu_to_le32(remaining_bytes); | |
1412 | else | |
1413 | req->RemainingBytes = 0; | |
1414 | ||
1415 | iov[0].iov_base = (char *)req; | |
1416 | /* 4 for rfc1002 length field */ | |
1417 | iov[0].iov_len = get_rfc1002_length(req) + 4; | |
1418 | return rc; | |
1419 | } | |
1420 | ||
1421 | static void | |
1422 | smb2_readv_callback(struct mid_q_entry *mid) | |
1423 | { | |
1424 | struct cifs_readdata *rdata = mid->callback_data; | |
1425 | struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink); | |
1426 | struct TCP_Server_Info *server = tcon->ses->server; | |
5819575e | 1427 | struct smb2_hdr *buf = (struct smb2_hdr *)rdata->iov.iov_base; |
09a4707e | 1428 | unsigned int credits_received = 1; |
5819575e | 1429 | struct smb_rqst rqst = { .rq_iov = &rdata->iov, |
8321fec4 JL |
1430 | .rq_nvec = 1, |
1431 | .rq_pages = rdata->pages, | |
1432 | .rq_npages = rdata->nr_pages, | |
1433 | .rq_pagesz = rdata->pagesz, | |
1434 | .rq_tailsz = rdata->tailsz }; | |
09a4707e | 1435 | |
f96637be JP |
1436 | cifs_dbg(FYI, "%s: mid=%llu state=%d result=%d bytes=%u\n", |
1437 | __func__, mid->mid, mid->mid_state, rdata->result, | |
1438 | rdata->bytes); | |
09a4707e PS |
1439 | |
1440 | switch (mid->mid_state) { | |
1441 | case MID_RESPONSE_RECEIVED: | |
1442 | credits_received = le16_to_cpu(buf->CreditRequest); | |
1443 | /* result already set, check signature */ | |
3c1bf7e4 PS |
1444 | if (server->sec_mode & |
1445 | (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) { | |
1446 | int rc; | |
1447 | ||
0b688cfc | 1448 | rc = smb2_verify_signature(&rqst, server); |
3c1bf7e4 | 1449 | if (rc) |
f96637be JP |
1450 | cifs_dbg(VFS, "SMB signature verification returned error = %d\n", |
1451 | rc); | |
3c1bf7e4 | 1452 | } |
09a4707e PS |
1453 | /* FIXME: should this be counted toward the initiating task? */ |
1454 | task_io_account_read(rdata->bytes); | |
1455 | cifs_stats_bytes_read(tcon, rdata->bytes); | |
1456 | break; | |
1457 | case MID_REQUEST_SUBMITTED: | |
1458 | case MID_RETRY_NEEDED: | |
1459 | rdata->result = -EAGAIN; | |
1460 | break; | |
1461 | default: | |
1462 | if (rdata->result != -ENODATA) | |
1463 | rdata->result = -EIO; | |
1464 | } | |
1465 | ||
1466 | if (rdata->result) | |
1467 | cifs_stats_fail_inc(tcon, SMB2_READ_HE); | |
1468 | ||
1469 | queue_work(cifsiod_wq, &rdata->work); | |
1470 | DeleteMidQEntry(mid); | |
1471 | add_credits(server, credits_received, 0); | |
1472 | } | |
1473 | ||
1474 | /* smb2_async_readv - send an async write, and set up mid to handle result */ | |
1475 | int | |
1476 | smb2_async_readv(struct cifs_readdata *rdata) | |
1477 | { | |
1478 | int rc; | |
1479 | struct smb2_hdr *buf; | |
1480 | struct cifs_io_parms io_parms; | |
5819575e | 1481 | struct smb_rqst rqst = { .rq_iov = &rdata->iov, |
fec344e3 | 1482 | .rq_nvec = 1 }; |
09a4707e | 1483 | |
f96637be JP |
1484 | cifs_dbg(FYI, "%s: offset=%llu bytes=%u\n", |
1485 | __func__, rdata->offset, rdata->bytes); | |
09a4707e PS |
1486 | |
1487 | io_parms.tcon = tlink_tcon(rdata->cfile->tlink); | |
1488 | io_parms.offset = rdata->offset; | |
1489 | io_parms.length = rdata->bytes; | |
1490 | io_parms.persistent_fid = rdata->cfile->fid.persistent_fid; | |
1491 | io_parms.volatile_fid = rdata->cfile->fid.volatile_fid; | |
1492 | io_parms.pid = rdata->pid; | |
5819575e | 1493 | rc = smb2_new_read_req(&rdata->iov, &io_parms, 0, 0); |
09a4707e PS |
1494 | if (rc) |
1495 | return rc; | |
1496 | ||
5819575e | 1497 | buf = (struct smb2_hdr *)rdata->iov.iov_base; |
09a4707e | 1498 | /* 4 for rfc1002 length field */ |
5819575e | 1499 | rdata->iov.iov_len = get_rfc1002_length(rdata->iov.iov_base) + 4; |
09a4707e PS |
1500 | |
1501 | kref_get(&rdata->refcount); | |
fec344e3 | 1502 | rc = cifs_call_async(io_parms.tcon->ses->server, &rqst, |
09a4707e PS |
1503 | cifs_readv_receive, smb2_readv_callback, |
1504 | rdata, 0); | |
e5d04887 | 1505 | if (rc) { |
09a4707e | 1506 | kref_put(&rdata->refcount, cifs_readdata_release); |
e5d04887 PS |
1507 | cifs_stats_fail_inc(io_parms.tcon, SMB2_READ_HE); |
1508 | } | |
09a4707e PS |
1509 | |
1510 | cifs_small_buf_release(buf); | |
1511 | return rc; | |
1512 | } | |
33319141 | 1513 | |
d8e05039 PS |
1514 | int |
1515 | SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms, | |
1516 | unsigned int *nbytes, char **buf, int *buf_type) | |
1517 | { | |
1518 | int resp_buftype, rc = -EACCES; | |
1519 | struct smb2_read_rsp *rsp = NULL; | |
1520 | struct kvec iov[1]; | |
1521 | ||
1522 | *nbytes = 0; | |
1523 | rc = smb2_new_read_req(iov, io_parms, 0, 0); | |
1524 | if (rc) | |
1525 | return rc; | |
1526 | ||
1527 | rc = SendReceive2(xid, io_parms->tcon->ses, iov, 1, | |
1528 | &resp_buftype, CIFS_LOG_ERROR); | |
1529 | ||
1530 | rsp = (struct smb2_read_rsp *)iov[0].iov_base; | |
1531 | ||
1532 | if (rsp->hdr.Status == STATUS_END_OF_FILE) { | |
1533 | free_rsp_buf(resp_buftype, iov[0].iov_base); | |
1534 | return 0; | |
1535 | } | |
1536 | ||
1537 | if (rc) { | |
1538 | cifs_stats_fail_inc(io_parms->tcon, SMB2_READ_HE); | |
f96637be | 1539 | cifs_dbg(VFS, "Send error in read = %d\n", rc); |
d8e05039 PS |
1540 | } else { |
1541 | *nbytes = le32_to_cpu(rsp->DataLength); | |
1542 | if ((*nbytes > CIFS_MAX_MSGSIZE) || | |
1543 | (*nbytes > io_parms->length)) { | |
f96637be JP |
1544 | cifs_dbg(FYI, "bad length %d for count %d\n", |
1545 | *nbytes, io_parms->length); | |
d8e05039 PS |
1546 | rc = -EIO; |
1547 | *nbytes = 0; | |
1548 | } | |
1549 | } | |
1550 | ||
1551 | if (*buf) { | |
1552 | memcpy(*buf, (char *)rsp->hdr.ProtocolId + rsp->DataOffset, | |
1553 | *nbytes); | |
1554 | free_rsp_buf(resp_buftype, iov[0].iov_base); | |
1555 | } else if (resp_buftype != CIFS_NO_BUFFER) { | |
1556 | *buf = iov[0].iov_base; | |
1557 | if (resp_buftype == CIFS_SMALL_BUFFER) | |
1558 | *buf_type = CIFS_SMALL_BUFFER; | |
1559 | else if (resp_buftype == CIFS_LARGE_BUFFER) | |
1560 | *buf_type = CIFS_LARGE_BUFFER; | |
1561 | } | |
1562 | return rc; | |
1563 | } | |
1564 | ||
33319141 PS |
1565 | /* |
1566 | * Check the mid_state and signature on received buffer (if any), and queue the | |
1567 | * workqueue completion task. | |
1568 | */ | |
1569 | static void | |
1570 | smb2_writev_callback(struct mid_q_entry *mid) | |
1571 | { | |
1572 | struct cifs_writedata *wdata = mid->callback_data; | |
1573 | struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink); | |
1574 | unsigned int written; | |
1575 | struct smb2_write_rsp *rsp = (struct smb2_write_rsp *)mid->resp_buf; | |
1576 | unsigned int credits_received = 1; | |
1577 | ||
1578 | switch (mid->mid_state) { | |
1579 | case MID_RESPONSE_RECEIVED: | |
1580 | credits_received = le16_to_cpu(rsp->hdr.CreditRequest); | |
1581 | wdata->result = smb2_check_receive(mid, tcon->ses->server, 0); | |
1582 | if (wdata->result != 0) | |
1583 | break; | |
1584 | ||
1585 | written = le32_to_cpu(rsp->DataLength); | |
1586 | /* | |
1587 | * Mask off high 16 bits when bytes written as returned | |
1588 | * by the server is greater than bytes requested by the | |
1589 | * client. OS/2 servers are known to set incorrect | |
1590 | * CountHigh values. | |
1591 | */ | |
1592 | if (written > wdata->bytes) | |
1593 | written &= 0xFFFF; | |
1594 | ||
1595 | if (written < wdata->bytes) | |
1596 | wdata->result = -ENOSPC; | |
1597 | else | |
1598 | wdata->bytes = written; | |
1599 | break; | |
1600 | case MID_REQUEST_SUBMITTED: | |
1601 | case MID_RETRY_NEEDED: | |
1602 | wdata->result = -EAGAIN; | |
1603 | break; | |
1604 | default: | |
1605 | wdata->result = -EIO; | |
1606 | break; | |
1607 | } | |
1608 | ||
1609 | if (wdata->result) | |
1610 | cifs_stats_fail_inc(tcon, SMB2_WRITE_HE); | |
1611 | ||
1612 | queue_work(cifsiod_wq, &wdata->work); | |
1613 | DeleteMidQEntry(mid); | |
1614 | add_credits(tcon->ses->server, credits_received, 0); | |
1615 | } | |
1616 | ||
1617 | /* smb2_async_writev - send an async write, and set up mid to handle result */ | |
1618 | int | |
1619 | smb2_async_writev(struct cifs_writedata *wdata) | |
1620 | { | |
eddb079d | 1621 | int rc = -EACCES; |
33319141 PS |
1622 | struct smb2_write_req *req = NULL; |
1623 | struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink); | |
eddb079d | 1624 | struct kvec iov; |
fec344e3 | 1625 | struct smb_rqst rqst; |
33319141 PS |
1626 | |
1627 | rc = small_smb2_init(SMB2_WRITE, tcon, (void **) &req); | |
1628 | if (rc) | |
1629 | goto async_writev_out; | |
1630 | ||
33319141 PS |
1631 | req->hdr.ProcessId = cpu_to_le32(wdata->cfile->pid); |
1632 | ||
1633 | req->PersistentFileId = wdata->cfile->fid.persistent_fid; | |
1634 | req->VolatileFileId = wdata->cfile->fid.volatile_fid; | |
1635 | req->WriteChannelInfoOffset = 0; | |
1636 | req->WriteChannelInfoLength = 0; | |
1637 | req->Channel = 0; | |
1638 | req->Offset = cpu_to_le64(wdata->offset); | |
1639 | /* 4 for rfc1002 length field */ | |
1640 | req->DataOffset = cpu_to_le16( | |
1641 | offsetof(struct smb2_write_req, Buffer) - 4); | |
1642 | req->RemainingBytes = 0; | |
1643 | ||
1644 | /* 4 for rfc1002 length field and 1 for Buffer */ | |
eddb079d JL |
1645 | iov.iov_len = get_rfc1002_length(req) + 4 - 1; |
1646 | iov.iov_base = req; | |
33319141 | 1647 | |
eddb079d JL |
1648 | rqst.rq_iov = &iov; |
1649 | rqst.rq_nvec = 1; | |
1650 | rqst.rq_pages = wdata->pages; | |
1651 | rqst.rq_npages = wdata->nr_pages; | |
1652 | rqst.rq_pagesz = wdata->pagesz; | |
1653 | rqst.rq_tailsz = wdata->tailsz; | |
33319141 | 1654 | |
f96637be JP |
1655 | cifs_dbg(FYI, "async write at %llu %u bytes\n", |
1656 | wdata->offset, wdata->bytes); | |
33319141 PS |
1657 | |
1658 | req->Length = cpu_to_le32(wdata->bytes); | |
1659 | ||
1660 | inc_rfc1001_len(&req->hdr, wdata->bytes - 1 /* Buffer */); | |
1661 | ||
1662 | kref_get(&wdata->refcount); | |
fec344e3 JL |
1663 | rc = cifs_call_async(tcon->ses->server, &rqst, NULL, |
1664 | smb2_writev_callback, wdata, 0); | |
33319141 | 1665 | |
e5d04887 | 1666 | if (rc) { |
33319141 | 1667 | kref_put(&wdata->refcount, cifs_writedata_release); |
e5d04887 PS |
1668 | cifs_stats_fail_inc(tcon, SMB2_WRITE_HE); |
1669 | } | |
33319141 | 1670 | |
33319141 PS |
1671 | async_writev_out: |
1672 | cifs_small_buf_release(req); | |
33319141 PS |
1673 | return rc; |
1674 | } | |
009d3443 PS |
1675 | |
1676 | /* | |
1677 | * SMB2_write function gets iov pointer to kvec array with n_vec as a length. | |
1678 | * The length field from io_parms must be at least 1 and indicates a number of | |
1679 | * elements with data to write that begins with position 1 in iov array. All | |
1680 | * data length is specified by count. | |
1681 | */ | |
1682 | int | |
1683 | SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms, | |
1684 | unsigned int *nbytes, struct kvec *iov, int n_vec) | |
1685 | { | |
1686 | int rc = 0; | |
1687 | struct smb2_write_req *req = NULL; | |
1688 | struct smb2_write_rsp *rsp = NULL; | |
1689 | int resp_buftype; | |
1690 | *nbytes = 0; | |
1691 | ||
1692 | if (n_vec < 1) | |
1693 | return rc; | |
1694 | ||
1695 | rc = small_smb2_init(SMB2_WRITE, io_parms->tcon, (void **) &req); | |
1696 | if (rc) | |
1697 | return rc; | |
1698 | ||
1699 | if (io_parms->tcon->ses->server == NULL) | |
1700 | return -ECONNABORTED; | |
1701 | ||
1702 | req->hdr.ProcessId = cpu_to_le32(io_parms->pid); | |
1703 | ||
1704 | req->PersistentFileId = io_parms->persistent_fid; | |
1705 | req->VolatileFileId = io_parms->volatile_fid; | |
1706 | req->WriteChannelInfoOffset = 0; | |
1707 | req->WriteChannelInfoLength = 0; | |
1708 | req->Channel = 0; | |
1709 | req->Length = cpu_to_le32(io_parms->length); | |
1710 | req->Offset = cpu_to_le64(io_parms->offset); | |
1711 | /* 4 for rfc1002 length field */ | |
1712 | req->DataOffset = cpu_to_le16( | |
1713 | offsetof(struct smb2_write_req, Buffer) - 4); | |
1714 | req->RemainingBytes = 0; | |
1715 | ||
1716 | iov[0].iov_base = (char *)req; | |
1717 | /* 4 for rfc1002 length field and 1 for Buffer */ | |
1718 | iov[0].iov_len = get_rfc1002_length(req) + 4 - 1; | |
1719 | ||
1720 | /* length of entire message including data to be written */ | |
1721 | inc_rfc1001_len(req, io_parms->length - 1 /* Buffer */); | |
1722 | ||
1723 | rc = SendReceive2(xid, io_parms->tcon->ses, iov, n_vec + 1, | |
1724 | &resp_buftype, 0); | |
e5d04887 | 1725 | rsp = (struct smb2_write_rsp *)iov[0].iov_base; |
009d3443 PS |
1726 | |
1727 | if (rc) { | |
1728 | cifs_stats_fail_inc(io_parms->tcon, SMB2_WRITE_HE); | |
f96637be | 1729 | cifs_dbg(VFS, "Send error in write = %d\n", rc); |
e5d04887 | 1730 | } else |
009d3443 | 1731 | *nbytes = le32_to_cpu(rsp->DataLength); |
e5d04887 PS |
1732 | |
1733 | free_rsp_buf(resp_buftype, rsp); | |
009d3443 PS |
1734 | return rc; |
1735 | } | |
35143eb5 | 1736 | |
d324f08d PS |
1737 | static unsigned int |
1738 | num_entries(char *bufstart, char *end_of_buf, char **lastentry, size_t size) | |
1739 | { | |
1740 | int len; | |
1741 | unsigned int entrycount = 0; | |
1742 | unsigned int next_offset = 0; | |
1743 | FILE_DIRECTORY_INFO *entryptr; | |
1744 | ||
1745 | if (bufstart == NULL) | |
1746 | return 0; | |
1747 | ||
1748 | entryptr = (FILE_DIRECTORY_INFO *)bufstart; | |
1749 | ||
1750 | while (1) { | |
1751 | entryptr = (FILE_DIRECTORY_INFO *) | |
1752 | ((char *)entryptr + next_offset); | |
1753 | ||
1754 | if ((char *)entryptr + size > end_of_buf) { | |
f96637be | 1755 | cifs_dbg(VFS, "malformed search entry would overflow\n"); |
d324f08d PS |
1756 | break; |
1757 | } | |
1758 | ||
1759 | len = le32_to_cpu(entryptr->FileNameLength); | |
1760 | if ((char *)entryptr + len + size > end_of_buf) { | |
f96637be JP |
1761 | cifs_dbg(VFS, "directory entry name would overflow frame end of buf %p\n", |
1762 | end_of_buf); | |
d324f08d PS |
1763 | break; |
1764 | } | |
1765 | ||
1766 | *lastentry = (char *)entryptr; | |
1767 | entrycount++; | |
1768 | ||
1769 | next_offset = le32_to_cpu(entryptr->NextEntryOffset); | |
1770 | if (!next_offset) | |
1771 | break; | |
1772 | } | |
1773 | ||
1774 | return entrycount; | |
1775 | } | |
1776 | ||
1777 | /* | |
1778 | * Readdir/FindFirst | |
1779 | */ | |
1780 | int | |
1781 | SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon, | |
1782 | u64 persistent_fid, u64 volatile_fid, int index, | |
1783 | struct cifs_search_info *srch_inf) | |
1784 | { | |
1785 | struct smb2_query_directory_req *req; | |
1786 | struct smb2_query_directory_rsp *rsp = NULL; | |
1787 | struct kvec iov[2]; | |
1788 | int rc = 0; | |
1789 | int len; | |
1790 | int resp_buftype; | |
1791 | unsigned char *bufptr; | |
1792 | struct TCP_Server_Info *server; | |
1793 | struct cifs_ses *ses = tcon->ses; | |
1794 | __le16 asteriks = cpu_to_le16('*'); | |
1795 | char *end_of_smb; | |
1796 | unsigned int output_size = CIFSMaxBufSize; | |
1797 | size_t info_buf_size; | |
1798 | ||
1799 | if (ses && (ses->server)) | |
1800 | server = ses->server; | |
1801 | else | |
1802 | return -EIO; | |
1803 | ||
1804 | rc = small_smb2_init(SMB2_QUERY_DIRECTORY, tcon, (void **) &req); | |
1805 | if (rc) | |
1806 | return rc; | |
1807 | ||
1808 | switch (srch_inf->info_level) { | |
1809 | case SMB_FIND_FILE_DIRECTORY_INFO: | |
1810 | req->FileInformationClass = FILE_DIRECTORY_INFORMATION; | |
1811 | info_buf_size = sizeof(FILE_DIRECTORY_INFO) - 1; | |
1812 | break; | |
1813 | case SMB_FIND_FILE_ID_FULL_DIR_INFO: | |
1814 | req->FileInformationClass = FILEID_FULL_DIRECTORY_INFORMATION; | |
1815 | info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO) - 1; | |
1816 | break; | |
1817 | default: | |
f96637be JP |
1818 | cifs_dbg(VFS, "info level %u isn't supported\n", |
1819 | srch_inf->info_level); | |
d324f08d PS |
1820 | rc = -EINVAL; |
1821 | goto qdir_exit; | |
1822 | } | |
1823 | ||
1824 | req->FileIndex = cpu_to_le32(index); | |
1825 | req->PersistentFileId = persistent_fid; | |
1826 | req->VolatileFileId = volatile_fid; | |
1827 | ||
1828 | len = 0x2; | |
1829 | bufptr = req->Buffer; | |
1830 | memcpy(bufptr, &asteriks, len); | |
1831 | ||
1832 | req->FileNameOffset = | |
1833 | cpu_to_le16(sizeof(struct smb2_query_directory_req) - 1 - 4); | |
1834 | req->FileNameLength = cpu_to_le16(len); | |
1835 | /* | |
1836 | * BB could be 30 bytes or so longer if we used SMB2 specific | |
1837 | * buffer lengths, but this is safe and close enough. | |
1838 | */ | |
1839 | output_size = min_t(unsigned int, output_size, server->maxBuf); | |
1840 | output_size = min_t(unsigned int, output_size, 2 << 15); | |
1841 | req->OutputBufferLength = cpu_to_le32(output_size); | |
1842 | ||
1843 | iov[0].iov_base = (char *)req; | |
1844 | /* 4 for RFC1001 length and 1 for Buffer */ | |
1845 | iov[0].iov_len = get_rfc1002_length(req) + 4 - 1; | |
1846 | ||
1847 | iov[1].iov_base = (char *)(req->Buffer); | |
1848 | iov[1].iov_len = len; | |
1849 | ||
1850 | inc_rfc1001_len(req, len - 1 /* Buffer */); | |
1851 | ||
1852 | rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, 0); | |
e5d04887 PS |
1853 | rsp = (struct smb2_query_directory_rsp *)iov[0].iov_base; |
1854 | ||
d324f08d | 1855 | if (rc) { |
922798d5 PS |
1856 | if (rc == -ENODATA && rsp->hdr.Status == STATUS_NO_MORE_FILES) { |
1857 | srch_inf->endOfSearch = true; | |
1858 | rc = 0; | |
1859 | } | |
d324f08d PS |
1860 | cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE); |
1861 | goto qdir_exit; | |
1862 | } | |
d324f08d PS |
1863 | |
1864 | rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset), | |
1865 | le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr, | |
1866 | info_buf_size); | |
1867 | if (rc) | |
1868 | goto qdir_exit; | |
1869 | ||
1870 | srch_inf->unicode = true; | |
1871 | ||
1872 | if (srch_inf->ntwrk_buf_start) { | |
1873 | if (srch_inf->smallBuf) | |
1874 | cifs_small_buf_release(srch_inf->ntwrk_buf_start); | |
1875 | else | |
1876 | cifs_buf_release(srch_inf->ntwrk_buf_start); | |
1877 | } | |
1878 | srch_inf->ntwrk_buf_start = (char *)rsp; | |
1879 | srch_inf->srch_entries_start = srch_inf->last_entry = 4 /* rfclen */ + | |
1880 | (char *)&rsp->hdr + le16_to_cpu(rsp->OutputBufferOffset); | |
1881 | /* 4 for rfc1002 length field */ | |
1882 | end_of_smb = get_rfc1002_length(rsp) + 4 + (char *)&rsp->hdr; | |
1883 | srch_inf->entries_in_buffer = | |
1884 | num_entries(srch_inf->srch_entries_start, end_of_smb, | |
1885 | &srch_inf->last_entry, info_buf_size); | |
1886 | srch_inf->index_of_last_entry += srch_inf->entries_in_buffer; | |
f96637be JP |
1887 | cifs_dbg(FYI, "num entries %d last_index %lld srch start %p srch end %p\n", |
1888 | srch_inf->entries_in_buffer, srch_inf->index_of_last_entry, | |
1889 | srch_inf->srch_entries_start, srch_inf->last_entry); | |
d324f08d PS |
1890 | if (resp_buftype == CIFS_LARGE_BUFFER) |
1891 | srch_inf->smallBuf = false; | |
1892 | else if (resp_buftype == CIFS_SMALL_BUFFER) | |
1893 | srch_inf->smallBuf = true; | |
1894 | else | |
f96637be | 1895 | cifs_dbg(VFS, "illegal search buffer type\n"); |
d324f08d | 1896 | |
d324f08d PS |
1897 | return rc; |
1898 | ||
1899 | qdir_exit: | |
1900 | free_rsp_buf(resp_buftype, rsp); | |
1901 | return rc; | |
1902 | } | |
1903 | ||
35143eb5 PS |
1904 | static int |
1905 | send_set_info(const unsigned int xid, struct cifs_tcon *tcon, | |
c839ff24 | 1906 | u64 persistent_fid, u64 volatile_fid, u32 pid, int info_class, |
35143eb5 PS |
1907 | unsigned int num, void **data, unsigned int *size) |
1908 | { | |
1909 | struct smb2_set_info_req *req; | |
1910 | struct smb2_set_info_rsp *rsp = NULL; | |
1911 | struct kvec *iov; | |
1912 | int rc = 0; | |
1913 | int resp_buftype; | |
1914 | unsigned int i; | |
1915 | struct TCP_Server_Info *server; | |
1916 | struct cifs_ses *ses = tcon->ses; | |
1917 | ||
1918 | if (ses && (ses->server)) | |
1919 | server = ses->server; | |
1920 | else | |
1921 | return -EIO; | |
1922 | ||
1923 | if (!num) | |
1924 | return -EINVAL; | |
1925 | ||
1926 | iov = kmalloc(sizeof(struct kvec) * num, GFP_KERNEL); | |
1927 | if (!iov) | |
1928 | return -ENOMEM; | |
1929 | ||
1930 | rc = small_smb2_init(SMB2_SET_INFO, tcon, (void **) &req); | |
1931 | if (rc) { | |
1932 | kfree(iov); | |
1933 | return rc; | |
1934 | } | |
1935 | ||
c839ff24 PS |
1936 | req->hdr.ProcessId = cpu_to_le32(pid); |
1937 | ||
35143eb5 PS |
1938 | req->InfoType = SMB2_O_INFO_FILE; |
1939 | req->FileInfoClass = info_class; | |
1940 | req->PersistentFileId = persistent_fid; | |
1941 | req->VolatileFileId = volatile_fid; | |
1942 | ||
1943 | /* 4 for RFC1001 length and 1 for Buffer */ | |
1944 | req->BufferOffset = | |
1945 | cpu_to_le16(sizeof(struct smb2_set_info_req) - 1 - 4); | |
1946 | req->BufferLength = cpu_to_le32(*size); | |
1947 | ||
1948 | inc_rfc1001_len(req, *size - 1 /* Buffer */); | |
1949 | ||
1950 | memcpy(req->Buffer, *data, *size); | |
1951 | ||
1952 | iov[0].iov_base = (char *)req; | |
1953 | /* 4 for RFC1001 length */ | |
1954 | iov[0].iov_len = get_rfc1002_length(req) + 4; | |
1955 | ||
1956 | for (i = 1; i < num; i++) { | |
1957 | inc_rfc1001_len(req, size[i]); | |
1958 | le32_add_cpu(&req->BufferLength, size[i]); | |
1959 | iov[i].iov_base = (char *)data[i]; | |
1960 | iov[i].iov_len = size[i]; | |
1961 | } | |
1962 | ||
1963 | rc = SendReceive2(xid, ses, iov, num, &resp_buftype, 0); | |
1964 | rsp = (struct smb2_set_info_rsp *)iov[0].iov_base; | |
1965 | ||
1966 | if (rc != 0) { | |
1967 | cifs_stats_fail_inc(tcon, SMB2_SET_INFO_HE); | |
1968 | goto out; | |
1969 | } | |
35143eb5 PS |
1970 | out: |
1971 | free_rsp_buf(resp_buftype, rsp); | |
1972 | kfree(iov); | |
1973 | return rc; | |
1974 | } | |
1975 | ||
1976 | int | |
1977 | SMB2_rename(const unsigned int xid, struct cifs_tcon *tcon, | |
1978 | u64 persistent_fid, u64 volatile_fid, __le16 *target_file) | |
1979 | { | |
1980 | struct smb2_file_rename_info info; | |
1981 | void **data; | |
1982 | unsigned int size[2]; | |
1983 | int rc; | |
1984 | int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX)); | |
1985 | ||
1986 | data = kmalloc(sizeof(void *) * 2, GFP_KERNEL); | |
1987 | if (!data) | |
1988 | return -ENOMEM; | |
1989 | ||
1990 | info.ReplaceIfExists = 1; /* 1 = replace existing target with new */ | |
1991 | /* 0 = fail if target already exists */ | |
1992 | info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */ | |
1993 | info.FileNameLength = cpu_to_le32(len); | |
1994 | ||
1995 | data[0] = &info; | |
1996 | size[0] = sizeof(struct smb2_file_rename_info); | |
1997 | ||
1998 | data[1] = target_file; | |
1999 | size[1] = len + 2 /* null */; | |
2000 | ||
2001 | rc = send_set_info(xid, tcon, persistent_fid, volatile_fid, | |
c839ff24 PS |
2002 | current->tgid, FILE_RENAME_INFORMATION, 2, data, |
2003 | size); | |
35143eb5 PS |
2004 | kfree(data); |
2005 | return rc; | |
2006 | } | |
568798cc PS |
2007 | |
2008 | int | |
2009 | SMB2_set_hardlink(const unsigned int xid, struct cifs_tcon *tcon, | |
2010 | u64 persistent_fid, u64 volatile_fid, __le16 *target_file) | |
2011 | { | |
2012 | struct smb2_file_link_info info; | |
2013 | void **data; | |
2014 | unsigned int size[2]; | |
2015 | int rc; | |
2016 | int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX)); | |
2017 | ||
2018 | data = kmalloc(sizeof(void *) * 2, GFP_KERNEL); | |
2019 | if (!data) | |
2020 | return -ENOMEM; | |
2021 | ||
2022 | info.ReplaceIfExists = 0; /* 1 = replace existing link with new */ | |
2023 | /* 0 = fail if link already exists */ | |
2024 | info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */ | |
2025 | info.FileNameLength = cpu_to_le32(len); | |
2026 | ||
2027 | data[0] = &info; | |
2028 | size[0] = sizeof(struct smb2_file_link_info); | |
2029 | ||
2030 | data[1] = target_file; | |
2031 | size[1] = len + 2 /* null */; | |
2032 | ||
2033 | rc = send_set_info(xid, tcon, persistent_fid, volatile_fid, | |
c839ff24 | 2034 | current->tgid, FILE_LINK_INFORMATION, 2, data, size); |
568798cc PS |
2035 | kfree(data); |
2036 | return rc; | |
2037 | } | |
c839ff24 PS |
2038 | |
2039 | int | |
2040 | SMB2_set_eof(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, | |
2041 | u64 volatile_fid, u32 pid, __le64 *eof) | |
2042 | { | |
2043 | struct smb2_file_eof_info info; | |
2044 | void *data; | |
2045 | unsigned int size; | |
2046 | ||
2047 | info.EndOfFile = *eof; | |
2048 | ||
2049 | data = &info; | |
2050 | size = sizeof(struct smb2_file_eof_info); | |
2051 | ||
2052 | return send_set_info(xid, tcon, persistent_fid, volatile_fid, pid, | |
2053 | FILE_END_OF_FILE_INFORMATION, 1, &data, &size); | |
2054 | } | |
1feeaac7 PS |
2055 | |
2056 | int | |
2057 | SMB2_set_info(const unsigned int xid, struct cifs_tcon *tcon, | |
2058 | u64 persistent_fid, u64 volatile_fid, FILE_BASIC_INFO *buf) | |
2059 | { | |
2060 | unsigned int size; | |
2061 | size = sizeof(FILE_BASIC_INFO); | |
2062 | return send_set_info(xid, tcon, persistent_fid, volatile_fid, | |
2063 | current->tgid, FILE_BASIC_INFORMATION, 1, | |
2064 | (void **)&buf, &size); | |
2065 | } | |
983c88a4 PS |
2066 | |
2067 | int | |
2068 | SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon, | |
2069 | const u64 persistent_fid, const u64 volatile_fid, | |
2070 | __u8 oplock_level) | |
2071 | { | |
2072 | int rc; | |
2073 | struct smb2_oplock_break *req = NULL; | |
2074 | ||
f96637be | 2075 | cifs_dbg(FYI, "SMB2_oplock_break\n"); |
983c88a4 PS |
2076 | rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req); |
2077 | ||
2078 | if (rc) | |
2079 | return rc; | |
2080 | ||
2081 | req->VolatileFid = volatile_fid; | |
2082 | req->PersistentFid = persistent_fid; | |
2083 | req->OplockLevel = oplock_level; | |
2084 | req->hdr.CreditRequest = cpu_to_le16(1); | |
2085 | ||
2086 | rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, CIFS_OBREAK_OP); | |
2087 | /* SMB2 buffer freed by function above */ | |
2088 | ||
2089 | if (rc) { | |
2090 | cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE); | |
f96637be | 2091 | cifs_dbg(FYI, "Send error in Oplock Break = %d\n", rc); |
983c88a4 PS |
2092 | } |
2093 | ||
2094 | return rc; | |
2095 | } | |
6fc05c25 PS |
2096 | |
2097 | static void | |
2098 | copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info *pfs_inf, | |
2099 | struct kstatfs *kst) | |
2100 | { | |
2101 | kst->f_bsize = le32_to_cpu(pfs_inf->BytesPerSector) * | |
2102 | le32_to_cpu(pfs_inf->SectorsPerAllocationUnit); | |
2103 | kst->f_blocks = le64_to_cpu(pfs_inf->TotalAllocationUnits); | |
2104 | kst->f_bfree = le64_to_cpu(pfs_inf->ActualAvailableAllocationUnits); | |
2105 | kst->f_bavail = le64_to_cpu(pfs_inf->CallerAvailableAllocationUnits); | |
2106 | return; | |
2107 | } | |
2108 | ||
2109 | static int | |
2110 | build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon, int level, | |
2111 | int outbuf_len, u64 persistent_fid, u64 volatile_fid) | |
2112 | { | |
2113 | int rc; | |
2114 | struct smb2_query_info_req *req; | |
2115 | ||
f96637be | 2116 | cifs_dbg(FYI, "Query FSInfo level %d\n", level); |
6fc05c25 PS |
2117 | |
2118 | if ((tcon->ses == NULL) || (tcon->ses->server == NULL)) | |
2119 | return -EIO; | |
2120 | ||
2121 | rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req); | |
2122 | if (rc) | |
2123 | return rc; | |
2124 | ||
2125 | req->InfoType = SMB2_O_INFO_FILESYSTEM; | |
2126 | req->FileInfoClass = level; | |
2127 | req->PersistentFileId = persistent_fid; | |
2128 | req->VolatileFileId = volatile_fid; | |
2129 | /* 4 for rfc1002 length field and 1 for pad */ | |
2130 | req->InputBufferOffset = | |
2131 | cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4); | |
2132 | req->OutputBufferLength = cpu_to_le32( | |
2133 | outbuf_len + sizeof(struct smb2_query_info_rsp) - 1 - 4); | |
2134 | ||
2135 | iov->iov_base = (char *)req; | |
2136 | /* 4 for rfc1002 length field */ | |
2137 | iov->iov_len = get_rfc1002_length(req) + 4; | |
2138 | return 0; | |
2139 | } | |
2140 | ||
2141 | int | |
2142 | SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon, | |
2143 | u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata) | |
2144 | { | |
2145 | struct smb2_query_info_rsp *rsp = NULL; | |
2146 | struct kvec iov; | |
2147 | int rc = 0; | |
2148 | int resp_buftype; | |
2149 | struct cifs_ses *ses = tcon->ses; | |
2150 | struct smb2_fs_full_size_info *info = NULL; | |
2151 | ||
2152 | rc = build_qfs_info_req(&iov, tcon, FS_FULL_SIZE_INFORMATION, | |
2153 | sizeof(struct smb2_fs_full_size_info), | |
2154 | persistent_fid, volatile_fid); | |
2155 | if (rc) | |
2156 | return rc; | |
2157 | ||
2158 | rc = SendReceive2(xid, ses, &iov, 1, &resp_buftype, 0); | |
2159 | if (rc) { | |
2160 | cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE); | |
2161 | goto qinf_exit; | |
2162 | } | |
2163 | rsp = (struct smb2_query_info_rsp *)iov.iov_base; | |
2164 | ||
2165 | info = (struct smb2_fs_full_size_info *)(4 /* RFC1001 len */ + | |
2166 | le16_to_cpu(rsp->OutputBufferOffset) + (char *)&rsp->hdr); | |
2167 | rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset), | |
2168 | le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr, | |
2169 | sizeof(struct smb2_fs_full_size_info)); | |
2170 | if (!rc) | |
2171 | copy_fs_info_to_kstatfs(info, fsdata); | |
2172 | ||
2173 | qinf_exit: | |
2174 | free_rsp_buf(resp_buftype, iov.iov_base); | |
2175 | return rc; | |
2176 | } | |
f7ba7fe6 PS |
2177 | |
2178 | int | |
2179 | smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon, | |
2180 | const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid, | |
2181 | const __u32 num_lock, struct smb2_lock_element *buf) | |
2182 | { | |
2183 | int rc = 0; | |
2184 | struct smb2_lock_req *req = NULL; | |
2185 | struct kvec iov[2]; | |
2186 | int resp_buf_type; | |
2187 | unsigned int count; | |
2188 | ||
f96637be | 2189 | cifs_dbg(FYI, "smb2_lockv num lock %d\n", num_lock); |
f7ba7fe6 PS |
2190 | |
2191 | rc = small_smb2_init(SMB2_LOCK, tcon, (void **) &req); | |
2192 | if (rc) | |
2193 | return rc; | |
2194 | ||
2195 | req->hdr.ProcessId = cpu_to_le32(pid); | |
2196 | req->LockCount = cpu_to_le16(num_lock); | |
2197 | ||
2198 | req->PersistentFileId = persist_fid; | |
2199 | req->VolatileFileId = volatile_fid; | |
2200 | ||
2201 | count = num_lock * sizeof(struct smb2_lock_element); | |
2202 | inc_rfc1001_len(req, count - sizeof(struct smb2_lock_element)); | |
2203 | ||
2204 | iov[0].iov_base = (char *)req; | |
2205 | /* 4 for rfc1002 length field and count for all locks */ | |
2206 | iov[0].iov_len = get_rfc1002_length(req) + 4 - count; | |
2207 | iov[1].iov_base = (char *)buf; | |
2208 | iov[1].iov_len = count; | |
2209 | ||
2210 | cifs_stats_inc(&tcon->stats.cifs_stats.num_locks); | |
2211 | rc = SendReceive2(xid, tcon->ses, iov, 2, &resp_buf_type, CIFS_NO_RESP); | |
2212 | if (rc) { | |
f96637be | 2213 | cifs_dbg(FYI, "Send error in smb2_lockv = %d\n", rc); |
f7ba7fe6 PS |
2214 | cifs_stats_fail_inc(tcon, SMB2_LOCK_HE); |
2215 | } | |
2216 | ||
2217 | return rc; | |
2218 | } | |
2219 | ||
2220 | int | |
2221 | SMB2_lock(const unsigned int xid, struct cifs_tcon *tcon, | |
2222 | const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid, | |
2223 | const __u64 length, const __u64 offset, const __u32 lock_flags, | |
2224 | const bool wait) | |
2225 | { | |
2226 | struct smb2_lock_element lock; | |
2227 | ||
2228 | lock.Offset = cpu_to_le64(offset); | |
2229 | lock.Length = cpu_to_le64(length); | |
2230 | lock.Flags = cpu_to_le32(lock_flags); | |
2231 | if (!wait && lock_flags != SMB2_LOCKFLAG_UNLOCK) | |
2232 | lock.Flags |= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY); | |
2233 | ||
2234 | return smb2_lockv(xid, tcon, persist_fid, volatile_fid, pid, 1, &lock); | |
2235 | } | |
0822f514 PS |
2236 | |
2237 | int | |
2238 | SMB2_lease_break(const unsigned int xid, struct cifs_tcon *tcon, | |
2239 | __u8 *lease_key, const __le32 lease_state) | |
2240 | { | |
2241 | int rc; | |
2242 | struct smb2_lease_ack *req = NULL; | |
2243 | ||
f96637be | 2244 | cifs_dbg(FYI, "SMB2_lease_break\n"); |
0822f514 PS |
2245 | rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req); |
2246 | ||
2247 | if (rc) | |
2248 | return rc; | |
2249 | ||
2250 | req->hdr.CreditRequest = cpu_to_le16(1); | |
2251 | req->StructureSize = cpu_to_le16(36); | |
2252 | inc_rfc1001_len(req, 12); | |
2253 | ||
2254 | memcpy(req->LeaseKey, lease_key, 16); | |
2255 | req->LeaseState = lease_state; | |
2256 | ||
2257 | rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, CIFS_OBREAK_OP); | |
2258 | /* SMB2 buffer freed by function above */ | |
2259 | ||
2260 | if (rc) { | |
2261 | cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE); | |
f96637be | 2262 | cifs_dbg(FYI, "Send error in Lease Break = %d\n", rc); |
0822f514 PS |
2263 | } |
2264 | ||
2265 | return rc; | |
2266 | } |