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ec2e4523 PS |
1 | /* |
2 | * fs/cifs/smb2pdu.c | |
3 | * | |
2b80d049 | 4 | * Copyright (C) International Business Machines Corp., 2009, 2013 |
ec2e4523 PS |
5 | * Etersoft, 2012 |
6 | * Author(s): Steve French (sfrench@us.ibm.com) | |
7 | * Pavel Shilovsky (pshilovsky@samba.org) 2012 | |
8 | * | |
9 | * Contains the routines for constructing the SMB2 PDUs themselves | |
10 | * | |
11 | * This library is free software; you can redistribute it and/or modify | |
12 | * it under the terms of the GNU Lesser General Public License as published | |
13 | * by the Free Software Foundation; either version 2.1 of the License, or | |
14 | * (at your option) any later version. | |
15 | * | |
16 | * This library is distributed in the hope that it will be useful, | |
17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See | |
19 | * the GNU Lesser General Public License for more details. | |
20 | * | |
21 | * You should have received a copy of the GNU Lesser General Public License | |
22 | * along with this library; if not, write to the Free Software | |
23 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
24 | */ | |
25 | ||
26 | /* SMB2 PDU handling routines here - except for leftovers (eg session setup) */ | |
27 | /* Note that there are handle based routines which must be */ | |
28 | /* treated slightly differently for reconnection purposes since we never */ | |
29 | /* want to reuse a stale file handle and only the caller knows the file info */ | |
30 | ||
31 | #include <linux/fs.h> | |
32 | #include <linux/kernel.h> | |
33 | #include <linux/vfs.h> | |
09a4707e | 34 | #include <linux/task_io_accounting_ops.h> |
ec2e4523 | 35 | #include <linux/uaccess.h> |
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 | ||
2b80d049 SF |
111 | /* GLOBAL_CAP_LARGE_MTU will only be set if dialect > SMB2.02 */ |
112 | /* See sections 2.2.4 and 3.2.4.1.5 of MS-SMB2 */ | |
84ceeb96 SF |
113 | if ((tcon->ses) && |
114 | (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) | |
2b80d049 SF |
115 | hdr->CreditCharge = cpu_to_le16(1); |
116 | /* else CreditCharge MBZ */ | |
117 | ||
ec2e4523 PS |
118 | hdr->TreeId = tcon->tid; |
119 | /* Uid is not converted */ | |
120 | if (tcon->ses) | |
121 | hdr->SessionId = tcon->ses->Suid; | |
f87ab88b SF |
122 | |
123 | /* | |
124 | * If we would set SMB2_FLAGS_DFS_OPERATIONS on open we also would have | |
125 | * to pass the path on the Open SMB prefixed by \\server\share. | |
126 | * Not sure when we would need to do the augmented path (if ever) and | |
127 | * setting this flag breaks the SMB2 open operation since it is | |
128 | * illegal to send an empty path name (without \\server\share prefix) | |
129 | * when the DFS flag is set in the SMB open header. We could | |
130 | * consider setting the flag on all operations other than open | |
131 | * but it is safer to net set it for now. | |
132 | */ | |
133 | /* if (tcon->share_flags & SHI1005_FLAGS_DFS) | |
134 | hdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS; */ | |
135 | ||
38d77c50 | 136 | if (tcon->ses && tcon->ses->server && tcon->ses->server->sign) |
3c1bf7e4 | 137 | hdr->Flags |= SMB2_FLAGS_SIGNED; |
ec2e4523 PS |
138 | out: |
139 | pdu->StructureSize2 = cpu_to_le16(parmsize); | |
140 | return; | |
141 | } | |
142 | ||
143 | static int | |
144 | smb2_reconnect(__le16 smb2_command, struct cifs_tcon *tcon) | |
145 | { | |
146 | int rc = 0; | |
aa24d1e9 PS |
147 | struct nls_table *nls_codepage; |
148 | struct cifs_ses *ses; | |
149 | struct TCP_Server_Info *server; | |
150 | ||
151 | /* | |
152 | * SMB2s NegProt, SessSetup, Logoff do not have tcon yet so | |
153 | * check for tcp and smb session status done differently | |
154 | * for those three - in the calling routine. | |
155 | */ | |
156 | if (tcon == NULL) | |
157 | return rc; | |
158 | ||
159 | if (smb2_command == SMB2_TREE_CONNECT) | |
160 | return rc; | |
161 | ||
162 | if (tcon->tidStatus == CifsExiting) { | |
163 | /* | |
164 | * only tree disconnect, open, and write, | |
165 | * (and ulogoff which does not have tcon) | |
166 | * are allowed as we start force umount. | |
167 | */ | |
168 | if ((smb2_command != SMB2_WRITE) && | |
169 | (smb2_command != SMB2_CREATE) && | |
170 | (smb2_command != SMB2_TREE_DISCONNECT)) { | |
f96637be JP |
171 | cifs_dbg(FYI, "can not send cmd %d while umounting\n", |
172 | smb2_command); | |
aa24d1e9 PS |
173 | return -ENODEV; |
174 | } | |
175 | } | |
176 | if ((!tcon->ses) || (tcon->ses->status == CifsExiting) || | |
177 | (!tcon->ses->server)) | |
178 | return -EIO; | |
179 | ||
180 | ses = tcon->ses; | |
181 | server = ses->server; | |
182 | ||
183 | /* | |
184 | * Give demultiplex thread up to 10 seconds to reconnect, should be | |
185 | * greater than cifs socket timeout which is 7 seconds | |
186 | */ | |
187 | while (server->tcpStatus == CifsNeedReconnect) { | |
188 | /* | |
189 | * Return to caller for TREE_DISCONNECT and LOGOFF and CLOSE | |
190 | * here since they are implicitly done when session drops. | |
191 | */ | |
192 | switch (smb2_command) { | |
193 | /* | |
194 | * BB Should we keep oplock break and add flush to exceptions? | |
195 | */ | |
196 | case SMB2_TREE_DISCONNECT: | |
197 | case SMB2_CANCEL: | |
198 | case SMB2_CLOSE: | |
199 | case SMB2_OPLOCK_BREAK: | |
200 | return -EAGAIN; | |
201 | } | |
202 | ||
203 | wait_event_interruptible_timeout(server->response_q, | |
204 | (server->tcpStatus != CifsNeedReconnect), 10 * HZ); | |
205 | ||
206 | /* are we still trying to reconnect? */ | |
207 | if (server->tcpStatus != CifsNeedReconnect) | |
208 | break; | |
209 | ||
210 | /* | |
211 | * on "soft" mounts we wait once. Hard mounts keep | |
212 | * retrying until process is killed or server comes | |
213 | * back on-line | |
214 | */ | |
215 | if (!tcon->retry) { | |
f96637be | 216 | cifs_dbg(FYI, "gave up waiting on reconnect in smb_init\n"); |
aa24d1e9 PS |
217 | return -EHOSTDOWN; |
218 | } | |
219 | } | |
220 | ||
221 | if (!tcon->ses->need_reconnect && !tcon->need_reconnect) | |
222 | return rc; | |
223 | ||
224 | nls_codepage = load_nls_default(); | |
225 | ||
226 | /* | |
227 | * need to prevent multiple threads trying to simultaneously reconnect | |
228 | * the same SMB session | |
229 | */ | |
230 | mutex_lock(&tcon->ses->session_mutex); | |
231 | rc = cifs_negotiate_protocol(0, tcon->ses); | |
232 | if (!rc && tcon->ses->need_reconnect) | |
233 | rc = cifs_setup_session(0, tcon->ses, nls_codepage); | |
234 | ||
235 | if (rc || !tcon->need_reconnect) { | |
236 | mutex_unlock(&tcon->ses->session_mutex); | |
237 | goto out; | |
238 | } | |
239 | ||
240 | cifs_mark_open_files_invalid(tcon); | |
241 | rc = SMB2_tcon(0, tcon->ses, tcon->treeName, tcon, nls_codepage); | |
242 | mutex_unlock(&tcon->ses->session_mutex); | |
f96637be | 243 | cifs_dbg(FYI, "reconnect tcon rc = %d\n", rc); |
aa24d1e9 PS |
244 | if (rc) |
245 | goto out; | |
246 | atomic_inc(&tconInfoReconnectCount); | |
aa24d1e9 PS |
247 | out: |
248 | /* | |
249 | * Check if handle based operation so we know whether we can continue | |
250 | * or not without returning to caller to reset file handle. | |
251 | */ | |
252 | /* | |
253 | * BB Is flush done by server on drop of tcp session? Should we special | |
254 | * case it and skip above? | |
255 | */ | |
256 | switch (smb2_command) { | |
257 | case SMB2_FLUSH: | |
258 | case SMB2_READ: | |
259 | case SMB2_WRITE: | |
260 | case SMB2_LOCK: | |
261 | case SMB2_IOCTL: | |
262 | case SMB2_QUERY_DIRECTORY: | |
263 | case SMB2_CHANGE_NOTIFY: | |
264 | case SMB2_QUERY_INFO: | |
265 | case SMB2_SET_INFO: | |
266 | return -EAGAIN; | |
267 | } | |
268 | unload_nls(nls_codepage); | |
ec2e4523 PS |
269 | return rc; |
270 | } | |
271 | ||
272 | /* | |
273 | * Allocate and return pointer to an SMB request hdr, and set basic | |
274 | * SMB information in the SMB header. If the return code is zero, this | |
275 | * function must have filled in request_buf pointer. | |
276 | */ | |
277 | static int | |
278 | small_smb2_init(__le16 smb2_command, struct cifs_tcon *tcon, | |
279 | void **request_buf) | |
280 | { | |
281 | int rc = 0; | |
282 | ||
283 | rc = smb2_reconnect(smb2_command, tcon); | |
284 | if (rc) | |
285 | return rc; | |
286 | ||
287 | /* BB eventually switch this to SMB2 specific small buf size */ | |
288 | *request_buf = cifs_small_buf_get(); | |
289 | if (*request_buf == NULL) { | |
290 | /* BB should we add a retry in here if not a writepage? */ | |
291 | return -ENOMEM; | |
292 | } | |
293 | ||
294 | smb2_hdr_assemble((struct smb2_hdr *) *request_buf, smb2_command, tcon); | |
295 | ||
296 | if (tcon != NULL) { | |
297 | #ifdef CONFIG_CIFS_STATS2 | |
ec2e4523 PS |
298 | uint16_t com_code = le16_to_cpu(smb2_command); |
299 | cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_sent[com_code]); | |
ec2e4523 PS |
300 | #endif |
301 | cifs_stats_inc(&tcon->num_smbs_sent); | |
302 | } | |
303 | ||
304 | return rc; | |
305 | } | |
306 | ||
ec2e4523 PS |
307 | /* |
308 | * | |
309 | * SMB2 Worker functions follow: | |
310 | * | |
311 | * The general structure of the worker functions is: | |
312 | * 1) Call smb2_init (assembles SMB2 header) | |
313 | * 2) Initialize SMB2 command specific fields in fixed length area of SMB | |
314 | * 3) Call smb_sendrcv2 (sends request on socket and waits for response) | |
315 | * 4) Decode SMB2 command specific fields in the fixed length area | |
316 | * 5) Decode variable length data area (if any for this SMB2 command type) | |
317 | * 6) Call free smb buffer | |
318 | * 7) return | |
319 | * | |
320 | */ | |
321 | ||
322 | int | |
323 | SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses) | |
324 | { | |
325 | struct smb2_negotiate_req *req; | |
326 | struct smb2_negotiate_rsp *rsp; | |
327 | struct kvec iov[1]; | |
328 | int rc = 0; | |
329 | int resp_buftype; | |
3534b850 | 330 | struct TCP_Server_Info *server = ses->server; |
ec2e4523 PS |
331 | int blob_offset, blob_length; |
332 | char *security_blob; | |
333 | int flags = CIFS_NEG_OP; | |
334 | ||
f96637be | 335 | cifs_dbg(FYI, "Negotiate protocol\n"); |
ec2e4523 | 336 | |
3534b850 JL |
337 | if (!server) { |
338 | WARN(1, "%s: server is NULL!\n", __func__); | |
339 | return -EIO; | |
ec2e4523 PS |
340 | } |
341 | ||
342 | rc = small_smb2_init(SMB2_NEGOTIATE, NULL, (void **) &req); | |
343 | if (rc) | |
344 | return rc; | |
345 | ||
ec2e4523 PS |
346 | req->hdr.SessionId = 0; |
347 | ||
e4aa25e7 | 348 | req->Dialects[0] = cpu_to_le16(ses->server->vals->protocol_id); |
ec2e4523 | 349 | |
e4aa25e7 SF |
350 | req->DialectCount = cpu_to_le16(1); /* One vers= at a time for now */ |
351 | inc_rfc1001_len(req, 2); | |
ec2e4523 PS |
352 | |
353 | /* only one of SMB2 signing flags may be set in SMB2 request */ | |
38d77c50 | 354 | if (ses->sign) |
9cd2e62c | 355 | req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED); |
38d77c50 | 356 | else if (global_secflags & CIFSSEC_MAY_SIGN) |
9cd2e62c | 357 | req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED); |
38d77c50 JL |
358 | else |
359 | req->SecurityMode = 0; | |
ec2e4523 | 360 | |
e4aa25e7 | 361 | req->Capabilities = cpu_to_le32(ses->server->vals->req_capabilities); |
ec2e4523 | 362 | |
3c5f9be1 SF |
363 | /* ClientGUID must be zero for SMB2.02 dialect */ |
364 | if (ses->server->vals->protocol_id == SMB20_PROT_ID) | |
365 | memset(req->ClientGUID, 0, SMB2_CLIENT_GUID_SIZE); | |
366 | else | |
367 | memcpy(req->ClientGUID, server->client_guid, | |
368 | SMB2_CLIENT_GUID_SIZE); | |
b8c32dbb | 369 | |
ec2e4523 PS |
370 | iov[0].iov_base = (char *)req; |
371 | /* 4 for rfc1002 length field */ | |
372 | iov[0].iov_len = get_rfc1002_length(req) + 4; | |
373 | ||
374 | rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, flags); | |
375 | ||
376 | rsp = (struct smb2_negotiate_rsp *)iov[0].iov_base; | |
377 | /* | |
378 | * No tcon so can't do | |
379 | * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]); | |
380 | */ | |
381 | if (rc != 0) | |
382 | goto neg_exit; | |
383 | ||
f96637be | 384 | cifs_dbg(FYI, "mode 0x%x\n", rsp->SecurityMode); |
ec2e4523 | 385 | |
e4aa25e7 SF |
386 | /* BB we may eventually want to match the negotiated vs. requested |
387 | dialect, even though we are only requesting one at a time */ | |
388 | if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) | |
f96637be | 389 | cifs_dbg(FYI, "negotiated smb2.0 dialect\n"); |
e4aa25e7 | 390 | else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) |
f96637be | 391 | cifs_dbg(FYI, "negotiated smb2.1 dialect\n"); |
e4aa25e7 | 392 | else if (rsp->DialectRevision == cpu_to_le16(SMB30_PROT_ID)) |
f96637be | 393 | cifs_dbg(FYI, "negotiated smb3.0 dialect\n"); |
20b6d8b4 SF |
394 | else if (rsp->DialectRevision == cpu_to_le16(SMB302_PROT_ID)) |
395 | cifs_dbg(FYI, "negotiated smb3.02 dialect\n"); | |
ec2e4523 | 396 | else { |
f96637be JP |
397 | cifs_dbg(VFS, "Illegal dialect returned by server %d\n", |
398 | le16_to_cpu(rsp->DialectRevision)); | |
ec2e4523 PS |
399 | rc = -EIO; |
400 | goto neg_exit; | |
401 | } | |
402 | server->dialect = le16_to_cpu(rsp->DialectRevision); | |
403 | ||
e598d1d8 JL |
404 | /* SMB2 only has an extended negflavor */ |
405 | server->negflavor = CIFS_NEGFLAVOR_EXTENDED; | |
2365c4ea PS |
406 | /* set it to the maximum buffer size value we can send with 1 credit */ |
407 | server->maxBuf = min_t(unsigned int, le32_to_cpu(rsp->MaxTransactSize), | |
408 | SMB2_MAX_BUFFER_SIZE); | |
ec2e4523 PS |
409 | server->max_read = le32_to_cpu(rsp->MaxReadSize); |
410 | server->max_write = le32_to_cpu(rsp->MaxWriteSize); | |
411 | /* BB Do we need to validate the SecurityMode? */ | |
412 | server->sec_mode = le16_to_cpu(rsp->SecurityMode); | |
413 | server->capabilities = le32_to_cpu(rsp->Capabilities); | |
29e20f9c PS |
414 | /* Internal types */ |
415 | server->capabilities |= SMB2_NT_FIND | SMB2_LARGE_FILES; | |
ec2e4523 PS |
416 | |
417 | security_blob = smb2_get_data_area_len(&blob_offset, &blob_length, | |
418 | &rsp->hdr); | |
5d875cc9 SF |
419 | /* |
420 | * See MS-SMB2 section 2.2.4: if no blob, client picks default which | |
421 | * for us will be | |
422 | * ses->sectype = RawNTLMSSP; | |
423 | * but for time being this is our only auth choice so doesn't matter. | |
424 | * We just found a server which sets blob length to zero expecting raw. | |
425 | */ | |
426 | if (blob_length == 0) | |
427 | cifs_dbg(FYI, "missing security blob on negprot\n"); | |
3c1bf7e4 | 428 | |
38d77c50 | 429 | rc = cifs_enable_signing(server, ses->sign); |
ec2e4523 | 430 | #ifdef CONFIG_SMB2_ASN1 /* BB REMOVEME when updated asn1.c ready */ |
9ddec561 JL |
431 | if (rc) |
432 | goto neg_exit; | |
5d875cc9 SF |
433 | if (blob_length) |
434 | rc = decode_neg_token_init(security_blob, blob_length, | |
ec2e4523 PS |
435 | &server->sec_type); |
436 | if (rc == 1) | |
437 | rc = 0; | |
438 | else if (rc == 0) { | |
439 | rc = -EIO; | |
440 | goto neg_exit; | |
441 | } | |
442 | #endif | |
443 | ||
444 | neg_exit: | |
445 | free_rsp_buf(resp_buftype, rsp); | |
446 | return rc; | |
447 | } | |
5478f9ba | 448 | |
ff1c038a SF |
449 | int smb3_validate_negotiate(const unsigned int xid, struct cifs_tcon *tcon) |
450 | { | |
451 | int rc = 0; | |
452 | struct validate_negotiate_info_req vneg_inbuf; | |
453 | struct validate_negotiate_info_rsp *pneg_rsp; | |
454 | u32 rsplen; | |
455 | ||
456 | cifs_dbg(FYI, "validate negotiate\n"); | |
457 | ||
458 | /* | |
459 | * validation ioctl must be signed, so no point sending this if we | |
460 | * can not sign it. We could eventually change this to selectively | |
461 | * sign just this, the first and only signed request on a connection. | |
462 | * This is good enough for now since a user who wants better security | |
463 | * would also enable signing on the mount. Having validation of | |
464 | * negotiate info for signed connections helps reduce attack vectors | |
465 | */ | |
466 | if (tcon->ses->server->sign == false) | |
467 | return 0; /* validation requires signing */ | |
468 | ||
469 | vneg_inbuf.Capabilities = | |
470 | cpu_to_le32(tcon->ses->server->vals->req_capabilities); | |
39552ea8 SP |
471 | memcpy(vneg_inbuf.Guid, tcon->ses->server->client_guid, |
472 | SMB2_CLIENT_GUID_SIZE); | |
ff1c038a SF |
473 | |
474 | if (tcon->ses->sign) | |
475 | vneg_inbuf.SecurityMode = | |
476 | cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED); | |
477 | else if (global_secflags & CIFSSEC_MAY_SIGN) | |
478 | vneg_inbuf.SecurityMode = | |
479 | cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED); | |
480 | else | |
481 | vneg_inbuf.SecurityMode = 0; | |
482 | ||
483 | vneg_inbuf.DialectCount = cpu_to_le16(1); | |
484 | vneg_inbuf.Dialects[0] = | |
485 | cpu_to_le16(tcon->ses->server->vals->protocol_id); | |
486 | ||
487 | rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID, | |
488 | FSCTL_VALIDATE_NEGOTIATE_INFO, true /* is_fsctl */, | |
489 | (char *)&vneg_inbuf, sizeof(struct validate_negotiate_info_req), | |
490 | (char **)&pneg_rsp, &rsplen); | |
491 | ||
492 | if (rc != 0) { | |
493 | cifs_dbg(VFS, "validate protocol negotiate failed: %d\n", rc); | |
494 | return -EIO; | |
495 | } | |
496 | ||
497 | if (rsplen != sizeof(struct validate_negotiate_info_rsp)) { | |
498 | cifs_dbg(VFS, "invalid size of protocol negotiate response\n"); | |
499 | return -EIO; | |
500 | } | |
501 | ||
502 | /* check validate negotiate info response matches what we got earlier */ | |
503 | if (pneg_rsp->Dialect != | |
504 | cpu_to_le16(tcon->ses->server->vals->protocol_id)) | |
505 | goto vneg_out; | |
506 | ||
507 | if (pneg_rsp->SecurityMode != cpu_to_le16(tcon->ses->server->sec_mode)) | |
508 | goto vneg_out; | |
509 | ||
510 | /* do not validate server guid because not saved at negprot time yet */ | |
511 | ||
512 | if ((le32_to_cpu(pneg_rsp->Capabilities) | SMB2_NT_FIND | | |
513 | SMB2_LARGE_FILES) != tcon->ses->server->capabilities) | |
514 | goto vneg_out; | |
515 | ||
516 | /* validate negotiate successful */ | |
517 | cifs_dbg(FYI, "validate negotiate info successful\n"); | |
518 | return 0; | |
519 | ||
520 | vneg_out: | |
521 | cifs_dbg(VFS, "protocol revalidation - security settings mismatch\n"); | |
522 | return -EIO; | |
523 | } | |
524 | ||
5478f9ba PS |
525 | int |
526 | SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses, | |
527 | const struct nls_table *nls_cp) | |
528 | { | |
529 | struct smb2_sess_setup_req *req; | |
530 | struct smb2_sess_setup_rsp *rsp = NULL; | |
531 | struct kvec iov[2]; | |
532 | int rc = 0; | |
533 | int resp_buftype; | |
534 | __le32 phase = NtLmNegotiate; /* NTLMSSP, if needed, is multistage */ | |
3534b850 | 535 | struct TCP_Server_Info *server = ses->server; |
5478f9ba PS |
536 | u16 blob_length = 0; |
537 | char *security_blob; | |
538 | char *ntlmssp_blob = NULL; | |
539 | bool use_spnego = false; /* else use raw ntlmssp */ | |
540 | ||
f96637be | 541 | cifs_dbg(FYI, "Session Setup\n"); |
5478f9ba | 542 | |
3534b850 JL |
543 | if (!server) { |
544 | WARN(1, "%s: server is NULL!\n", __func__); | |
545 | return -EIO; | |
5478f9ba PS |
546 | } |
547 | ||
d4e63bd6 SP |
548 | /* |
549 | * If we are here due to reconnect, free per-smb session key | |
550 | * in case signing was required. | |
551 | */ | |
552 | kfree(ses->auth_key.response); | |
553 | ses->auth_key.response = NULL; | |
554 | ||
5478f9ba PS |
555 | /* |
556 | * If memory allocation is successful, caller of this function | |
557 | * frees it. | |
558 | */ | |
559 | ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL); | |
560 | if (!ses->ntlmssp) | |
561 | return -ENOMEM; | |
5c234aa5 | 562 | ses->ntlmssp->sesskey_per_smbsess = true; |
5478f9ba | 563 | |
3f618223 JL |
564 | /* FIXME: allow for other auth types besides NTLMSSP (e.g. krb5) */ |
565 | ses->sectype = RawNTLMSSP; | |
5478f9ba PS |
566 | |
567 | ssetup_ntlmssp_authenticate: | |
568 | if (phase == NtLmChallenge) | |
569 | phase = NtLmAuthenticate; /* if ntlmssp, now final phase */ | |
570 | ||
571 | rc = small_smb2_init(SMB2_SESSION_SETUP, NULL, (void **) &req); | |
572 | if (rc) | |
573 | return rc; | |
574 | ||
5478f9ba PS |
575 | req->hdr.SessionId = 0; /* First session, not a reauthenticate */ |
576 | req->VcNumber = 0; /* MBZ */ | |
577 | /* to enable echos and oplocks */ | |
578 | req->hdr.CreditRequest = cpu_to_le16(3); | |
579 | ||
580 | /* only one of SMB2 signing flags may be set in SMB2 request */ | |
38d77c50 JL |
581 | if (server->sign) |
582 | req->SecurityMode = SMB2_NEGOTIATE_SIGNING_REQUIRED; | |
583 | else if (global_secflags & CIFSSEC_MAY_SIGN) /* one flag unlike MUST_ */ | |
584 | req->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED; | |
585 | else | |
586 | req->SecurityMode = 0; | |
587 | ||
5478f9ba PS |
588 | req->Capabilities = 0; |
589 | req->Channel = 0; /* MBZ */ | |
590 | ||
591 | iov[0].iov_base = (char *)req; | |
592 | /* 4 for rfc1002 length field and 1 for pad */ | |
593 | iov[0].iov_len = get_rfc1002_length(req) + 4 - 1; | |
594 | if (phase == NtLmNegotiate) { | |
595 | ntlmssp_blob = kmalloc(sizeof(struct _NEGOTIATE_MESSAGE), | |
596 | GFP_KERNEL); | |
597 | if (ntlmssp_blob == NULL) { | |
598 | rc = -ENOMEM; | |
599 | goto ssetup_exit; | |
600 | } | |
601 | build_ntlmssp_negotiate_blob(ntlmssp_blob, ses); | |
602 | if (use_spnego) { | |
603 | /* blob_length = build_spnego_ntlmssp_blob( | |
604 | &security_blob, | |
605 | sizeof(struct _NEGOTIATE_MESSAGE), | |
606 | ntlmssp_blob); */ | |
607 | /* BB eventually need to add this */ | |
f96637be | 608 | cifs_dbg(VFS, "spnego not supported for SMB2 yet\n"); |
5478f9ba PS |
609 | rc = -EOPNOTSUPP; |
610 | kfree(ntlmssp_blob); | |
611 | goto ssetup_exit; | |
612 | } else { | |
613 | blob_length = sizeof(struct _NEGOTIATE_MESSAGE); | |
614 | /* with raw NTLMSSP we don't encapsulate in SPNEGO */ | |
615 | security_blob = ntlmssp_blob; | |
616 | } | |
617 | } else if (phase == NtLmAuthenticate) { | |
618 | req->hdr.SessionId = ses->Suid; | |
619 | ntlmssp_blob = kzalloc(sizeof(struct _NEGOTIATE_MESSAGE) + 500, | |
620 | GFP_KERNEL); | |
621 | if (ntlmssp_blob == NULL) { | |
5478f9ba PS |
622 | rc = -ENOMEM; |
623 | goto ssetup_exit; | |
624 | } | |
625 | rc = build_ntlmssp_auth_blob(ntlmssp_blob, &blob_length, ses, | |
626 | nls_cp); | |
627 | if (rc) { | |
f96637be JP |
628 | cifs_dbg(FYI, "build_ntlmssp_auth_blob failed %d\n", |
629 | rc); | |
5478f9ba PS |
630 | goto ssetup_exit; /* BB double check error handling */ |
631 | } | |
632 | if (use_spnego) { | |
633 | /* blob_length = build_spnego_ntlmssp_blob( | |
634 | &security_blob, | |
635 | blob_length, | |
636 | ntlmssp_blob); */ | |
f96637be | 637 | cifs_dbg(VFS, "spnego not supported for SMB2 yet\n"); |
5478f9ba PS |
638 | rc = -EOPNOTSUPP; |
639 | kfree(ntlmssp_blob); | |
640 | goto ssetup_exit; | |
641 | } else { | |
642 | security_blob = ntlmssp_blob; | |
643 | } | |
644 | } else { | |
f96637be | 645 | cifs_dbg(VFS, "illegal ntlmssp phase\n"); |
5478f9ba PS |
646 | rc = -EIO; |
647 | goto ssetup_exit; | |
648 | } | |
649 | ||
650 | /* Testing shows that buffer offset must be at location of Buffer[0] */ | |
651 | req->SecurityBufferOffset = | |
652 | cpu_to_le16(sizeof(struct smb2_sess_setup_req) - | |
653 | 1 /* pad */ - 4 /* rfc1001 len */); | |
654 | req->SecurityBufferLength = cpu_to_le16(blob_length); | |
655 | iov[1].iov_base = security_blob; | |
656 | iov[1].iov_len = blob_length; | |
657 | ||
658 | inc_rfc1001_len(req, blob_length - 1 /* pad */); | |
659 | ||
660 | /* BB add code to build os and lm fields */ | |
661 | ||
6d8b59d7 SF |
662 | rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, |
663 | CIFS_LOG_ERROR | CIFS_NEG_OP); | |
5478f9ba PS |
664 | |
665 | kfree(security_blob); | |
666 | rsp = (struct smb2_sess_setup_rsp *)iov[0].iov_base; | |
4ca3a99c PS |
667 | if (resp_buftype != CIFS_NO_BUFFER && |
668 | rsp->hdr.Status == STATUS_MORE_PROCESSING_REQUIRED) { | |
5478f9ba | 669 | if (phase != NtLmNegotiate) { |
f96637be | 670 | cifs_dbg(VFS, "Unexpected more processing error\n"); |
5478f9ba PS |
671 | goto ssetup_exit; |
672 | } | |
673 | if (offsetof(struct smb2_sess_setup_rsp, Buffer) - 4 != | |
4ca3a99c | 674 | le16_to_cpu(rsp->SecurityBufferOffset)) { |
f96637be JP |
675 | cifs_dbg(VFS, "Invalid security buffer offset %d\n", |
676 | le16_to_cpu(rsp->SecurityBufferOffset)); | |
5478f9ba PS |
677 | rc = -EIO; |
678 | goto ssetup_exit; | |
679 | } | |
680 | ||
681 | /* NTLMSSP Negotiate sent now processing challenge (response) */ | |
682 | phase = NtLmChallenge; /* process ntlmssp challenge */ | |
683 | rc = 0; /* MORE_PROCESSING is not an error here but expected */ | |
684 | ses->Suid = rsp->hdr.SessionId; | |
685 | rc = decode_ntlmssp_challenge(rsp->Buffer, | |
686 | le16_to_cpu(rsp->SecurityBufferLength), ses); | |
687 | } | |
688 | ||
689 | /* | |
690 | * BB eventually add code for SPNEGO decoding of NtlmChallenge blob, | |
691 | * but at least the raw NTLMSSP case works. | |
692 | */ | |
693 | /* | |
694 | * No tcon so can't do | |
695 | * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]); | |
696 | */ | |
697 | if (rc != 0) | |
698 | goto ssetup_exit; | |
699 | ||
5478f9ba | 700 | ses->session_flags = le16_to_cpu(rsp->SessionFlags); |
0cbaa53c SF |
701 | if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) |
702 | cifs_dbg(VFS, "SMB3 encryption not supported yet\n"); | |
5478f9ba PS |
703 | ssetup_exit: |
704 | free_rsp_buf(resp_buftype, rsp); | |
705 | ||
706 | /* if ntlmssp, and negotiate succeeded, proceed to authenticate phase */ | |
707 | if ((phase == NtLmChallenge) && (rc == 0)) | |
708 | goto ssetup_ntlmssp_authenticate; | |
d4e63bd6 SP |
709 | |
710 | if (!rc) { | |
711 | mutex_lock(&server->srv_mutex); | |
32811d24 SP |
712 | if (server->sign && server->ops->generate_signingkey) { |
713 | rc = server->ops->generate_signingkey(ses); | |
714 | kfree(ses->auth_key.response); | |
715 | ses->auth_key.response = NULL; | |
716 | if (rc) { | |
717 | cifs_dbg(FYI, | |
718 | "SMB3 session key generation failed\n"); | |
719 | mutex_unlock(&server->srv_mutex); | |
720 | goto keygen_exit; | |
721 | } | |
722 | } | |
d4e63bd6 SP |
723 | if (!server->session_estab) { |
724 | server->sequence_number = 0x2; | |
725 | server->session_estab = true; | |
d4e63bd6 SP |
726 | } |
727 | mutex_unlock(&server->srv_mutex); | |
728 | ||
729 | cifs_dbg(FYI, "SMB2/3 session established successfully\n"); | |
730 | spin_lock(&GlobalMid_Lock); | |
731 | ses->status = CifsGood; | |
732 | ses->need_reconnect = false; | |
733 | spin_unlock(&GlobalMid_Lock); | |
734 | } | |
735 | ||
32811d24 | 736 | keygen_exit: |
d4e63bd6 SP |
737 | if (!server->sign) { |
738 | kfree(ses->auth_key.response); | |
739 | ses->auth_key.response = NULL; | |
740 | } | |
741 | kfree(ses->ntlmssp); | |
742 | ||
5478f9ba PS |
743 | return rc; |
744 | } | |
745 | ||
746 | int | |
747 | SMB2_logoff(const unsigned int xid, struct cifs_ses *ses) | |
748 | { | |
749 | struct smb2_logoff_req *req; /* response is also trivial struct */ | |
750 | int rc = 0; | |
751 | struct TCP_Server_Info *server; | |
752 | ||
f96637be | 753 | cifs_dbg(FYI, "disconnect session %p\n", ses); |
5478f9ba PS |
754 | |
755 | if (ses && (ses->server)) | |
756 | server = ses->server; | |
757 | else | |
758 | return -EIO; | |
759 | ||
eb4c7df6 SP |
760 | /* no need to send SMB logoff if uid already closed due to reconnect */ |
761 | if (ses->need_reconnect) | |
762 | goto smb2_session_already_dead; | |
763 | ||
5478f9ba PS |
764 | rc = small_smb2_init(SMB2_LOGOFF, NULL, (void **) &req); |
765 | if (rc) | |
766 | return rc; | |
767 | ||
768 | /* since no tcon, smb2_init can not do this, so do here */ | |
769 | req->hdr.SessionId = ses->Suid; | |
38d77c50 | 770 | if (server->sign) |
3c1bf7e4 | 771 | req->hdr.Flags |= SMB2_FLAGS_SIGNED; |
5478f9ba PS |
772 | |
773 | rc = SendReceiveNoRsp(xid, ses, (char *) &req->hdr, 0); | |
774 | /* | |
775 | * No tcon so can't do | |
776 | * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]); | |
777 | */ | |
eb4c7df6 SP |
778 | |
779 | smb2_session_already_dead: | |
5478f9ba PS |
780 | return rc; |
781 | } | |
faaf946a PS |
782 | |
783 | static inline void cifs_stats_fail_inc(struct cifs_tcon *tcon, uint16_t code) | |
784 | { | |
d60622eb | 785 | cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_failed[code]); |
faaf946a PS |
786 | } |
787 | ||
788 | #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */) | |
789 | ||
de9f68df SF |
790 | /* These are similar values to what Windows uses */ |
791 | static inline void init_copy_chunk_defaults(struct cifs_tcon *tcon) | |
792 | { | |
793 | tcon->max_chunks = 256; | |
794 | tcon->max_bytes_chunk = 1048576; | |
795 | tcon->max_bytes_copy = 16777216; | |
796 | } | |
797 | ||
faaf946a PS |
798 | int |
799 | SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree, | |
800 | struct cifs_tcon *tcon, const struct nls_table *cp) | |
801 | { | |
802 | struct smb2_tree_connect_req *req; | |
803 | struct smb2_tree_connect_rsp *rsp = NULL; | |
804 | struct kvec iov[2]; | |
805 | int rc = 0; | |
806 | int resp_buftype; | |
807 | int unc_path_len; | |
808 | struct TCP_Server_Info *server; | |
809 | __le16 *unc_path = NULL; | |
810 | ||
f96637be | 811 | cifs_dbg(FYI, "TCON\n"); |
faaf946a PS |
812 | |
813 | if ((ses->server) && tree) | |
814 | server = ses->server; | |
815 | else | |
816 | return -EIO; | |
817 | ||
818 | if (tcon && tcon->bad_network_name) | |
819 | return -ENOENT; | |
820 | ||
821 | unc_path = kmalloc(MAX_SHARENAME_LENGTH * 2, GFP_KERNEL); | |
822 | if (unc_path == NULL) | |
823 | return -ENOMEM; | |
824 | ||
825 | unc_path_len = cifs_strtoUTF16(unc_path, tree, strlen(tree), cp) + 1; | |
826 | unc_path_len *= 2; | |
827 | if (unc_path_len < 2) { | |
828 | kfree(unc_path); | |
829 | return -EINVAL; | |
830 | } | |
831 | ||
832 | rc = small_smb2_init(SMB2_TREE_CONNECT, tcon, (void **) &req); | |
833 | if (rc) { | |
834 | kfree(unc_path); | |
835 | return rc; | |
836 | } | |
837 | ||
838 | if (tcon == NULL) { | |
839 | /* since no tcon, smb2_init can not do this, so do here */ | |
840 | req->hdr.SessionId = ses->Suid; | |
841 | /* if (ses->server->sec_mode & SECMODE_SIGN_REQUIRED) | |
842 | req->hdr.Flags |= SMB2_FLAGS_SIGNED; */ | |
843 | } | |
844 | ||
845 | iov[0].iov_base = (char *)req; | |
846 | /* 4 for rfc1002 length field and 1 for pad */ | |
847 | iov[0].iov_len = get_rfc1002_length(req) + 4 - 1; | |
848 | ||
849 | /* Testing shows that buffer offset must be at location of Buffer[0] */ | |
850 | req->PathOffset = cpu_to_le16(sizeof(struct smb2_tree_connect_req) | |
851 | - 1 /* pad */ - 4 /* do not count rfc1001 len field */); | |
852 | req->PathLength = cpu_to_le16(unc_path_len - 2); | |
853 | iov[1].iov_base = unc_path; | |
854 | iov[1].iov_len = unc_path_len; | |
855 | ||
856 | inc_rfc1001_len(req, unc_path_len - 1 /* pad */); | |
857 | ||
858 | rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, 0); | |
859 | rsp = (struct smb2_tree_connect_rsp *)iov[0].iov_base; | |
860 | ||
861 | if (rc != 0) { | |
862 | if (tcon) { | |
863 | cifs_stats_fail_inc(tcon, SMB2_TREE_CONNECT_HE); | |
864 | tcon->need_reconnect = true; | |
865 | } | |
866 | goto tcon_error_exit; | |
867 | } | |
868 | ||
faaf946a PS |
869 | if (tcon == NULL) { |
870 | ses->ipc_tid = rsp->hdr.TreeId; | |
871 | goto tcon_exit; | |
872 | } | |
873 | ||
874 | if (rsp->ShareType & SMB2_SHARE_TYPE_DISK) | |
f96637be | 875 | cifs_dbg(FYI, "connection to disk share\n"); |
faaf946a PS |
876 | else if (rsp->ShareType & SMB2_SHARE_TYPE_PIPE) { |
877 | tcon->ipc = true; | |
f96637be | 878 | cifs_dbg(FYI, "connection to pipe share\n"); |
faaf946a PS |
879 | } else if (rsp->ShareType & SMB2_SHARE_TYPE_PRINT) { |
880 | tcon->print = true; | |
f96637be | 881 | cifs_dbg(FYI, "connection to printer\n"); |
faaf946a | 882 | } else { |
f96637be | 883 | cifs_dbg(VFS, "unknown share type %d\n", rsp->ShareType); |
faaf946a PS |
884 | rc = -EOPNOTSUPP; |
885 | goto tcon_error_exit; | |
886 | } | |
887 | ||
888 | tcon->share_flags = le32_to_cpu(rsp->ShareFlags); | |
769ee6a4 | 889 | tcon->capabilities = rsp->Capabilities; /* we keep caps little endian */ |
faaf946a PS |
890 | tcon->maximal_access = le32_to_cpu(rsp->MaximalAccess); |
891 | tcon->tidStatus = CifsGood; | |
892 | tcon->need_reconnect = false; | |
893 | tcon->tid = rsp->hdr.TreeId; | |
46b51d08 | 894 | strlcpy(tcon->treeName, tree, sizeof(tcon->treeName)); |
faaf946a PS |
895 | |
896 | if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) && | |
897 | ((tcon->share_flags & SHI1005_FLAGS_DFS) == 0)) | |
f96637be | 898 | cifs_dbg(VFS, "DFS capability contradicts DFS flag\n"); |
de9f68df | 899 | init_copy_chunk_defaults(tcon); |
ff1c038a SF |
900 | if (tcon->ses->server->ops->validate_negotiate) |
901 | rc = tcon->ses->server->ops->validate_negotiate(xid, tcon); | |
faaf946a PS |
902 | tcon_exit: |
903 | free_rsp_buf(resp_buftype, rsp); | |
904 | kfree(unc_path); | |
905 | return rc; | |
906 | ||
907 | tcon_error_exit: | |
908 | if (rsp->hdr.Status == STATUS_BAD_NETWORK_NAME) { | |
f96637be | 909 | cifs_dbg(VFS, "BAD_NETWORK_NAME: %s\n", tree); |
faaf946a PS |
910 | tcon->bad_network_name = true; |
911 | } | |
912 | goto tcon_exit; | |
913 | } | |
914 | ||
915 | int | |
916 | SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon) | |
917 | { | |
918 | struct smb2_tree_disconnect_req *req; /* response is trivial */ | |
919 | int rc = 0; | |
920 | struct TCP_Server_Info *server; | |
921 | struct cifs_ses *ses = tcon->ses; | |
922 | ||
f96637be | 923 | cifs_dbg(FYI, "Tree Disconnect\n"); |
faaf946a PS |
924 | |
925 | if (ses && (ses->server)) | |
926 | server = ses->server; | |
927 | else | |
928 | return -EIO; | |
929 | ||
930 | if ((tcon->need_reconnect) || (tcon->ses->need_reconnect)) | |
931 | return 0; | |
932 | ||
933 | rc = small_smb2_init(SMB2_TREE_DISCONNECT, tcon, (void **) &req); | |
934 | if (rc) | |
935 | return rc; | |
936 | ||
937 | rc = SendReceiveNoRsp(xid, ses, (char *)&req->hdr, 0); | |
938 | if (rc) | |
939 | cifs_stats_fail_inc(tcon, SMB2_TREE_DISCONNECT_HE); | |
940 | ||
941 | return rc; | |
942 | } | |
2503a0db | 943 | |
b8c32dbb | 944 | |
63eb3def PS |
945 | static struct create_durable * |
946 | create_durable_buf(void) | |
947 | { | |
948 | struct create_durable *buf; | |
949 | ||
950 | buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL); | |
951 | if (!buf) | |
952 | return NULL; | |
953 | ||
954 | buf->ccontext.DataOffset = cpu_to_le16(offsetof | |
9cbc0b73 | 955 | (struct create_durable, Data)); |
63eb3def PS |
956 | buf->ccontext.DataLength = cpu_to_le32(16); |
957 | buf->ccontext.NameOffset = cpu_to_le16(offsetof | |
958 | (struct create_durable, Name)); | |
959 | buf->ccontext.NameLength = cpu_to_le16(4); | |
12197a7f | 960 | /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DHnQ" */ |
63eb3def PS |
961 | buf->Name[0] = 'D'; |
962 | buf->Name[1] = 'H'; | |
963 | buf->Name[2] = 'n'; | |
964 | buf->Name[3] = 'Q'; | |
965 | return buf; | |
966 | } | |
967 | ||
9cbc0b73 PS |
968 | static struct create_durable * |
969 | create_reconnect_durable_buf(struct cifs_fid *fid) | |
970 | { | |
971 | struct create_durable *buf; | |
972 | ||
973 | buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL); | |
974 | if (!buf) | |
975 | return NULL; | |
976 | ||
977 | buf->ccontext.DataOffset = cpu_to_le16(offsetof | |
978 | (struct create_durable, Data)); | |
979 | buf->ccontext.DataLength = cpu_to_le32(16); | |
980 | buf->ccontext.NameOffset = cpu_to_le16(offsetof | |
981 | (struct create_durable, Name)); | |
982 | buf->ccontext.NameLength = cpu_to_le16(4); | |
983 | buf->Data.Fid.PersistentFileId = fid->persistent_fid; | |
984 | buf->Data.Fid.VolatileFileId = fid->volatile_fid; | |
12197a7f | 985 | /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT is "DHnC" */ |
9cbc0b73 PS |
986 | buf->Name[0] = 'D'; |
987 | buf->Name[1] = 'H'; | |
988 | buf->Name[2] = 'n'; | |
989 | buf->Name[3] = 'C'; | |
990 | return buf; | |
991 | } | |
992 | ||
b8c32dbb | 993 | static __u8 |
42873b0a PS |
994 | parse_lease_state(struct TCP_Server_Info *server, struct smb2_create_rsp *rsp, |
995 | unsigned int *epoch) | |
b8c32dbb PS |
996 | { |
997 | char *data_offset; | |
b5c7cde3 | 998 | struct create_context *cc; |
fd554396 PS |
999 | unsigned int next = 0; |
1000 | char *name; | |
b8c32dbb | 1001 | |
fd554396 | 1002 | data_offset = (char *)rsp + 4 + le32_to_cpu(rsp->CreateContextsOffset); |
b5c7cde3 | 1003 | cc = (struct create_context *)data_offset; |
b8c32dbb | 1004 | do { |
b5c7cde3 PS |
1005 | cc = (struct create_context *)((char *)cc + next); |
1006 | name = le16_to_cpu(cc->NameOffset) + (char *)cc; | |
1007 | if (le16_to_cpu(cc->NameLength) != 4 || | |
b8c32dbb | 1008 | strncmp(name, "RqLs", 4)) { |
b5c7cde3 | 1009 | next = le32_to_cpu(cc->Next); |
b8c32dbb PS |
1010 | continue; |
1011 | } | |
42873b0a | 1012 | return server->ops->parse_lease_buf(cc, epoch); |
fd554396 | 1013 | } while (next != 0); |
b8c32dbb | 1014 | |
b5c7cde3 | 1015 | return 0; |
b8c32dbb PS |
1016 | } |
1017 | ||
d22cbfec | 1018 | static int |
a41a28bd PS |
1019 | add_lease_context(struct TCP_Server_Info *server, struct kvec *iov, |
1020 | unsigned int *num_iovec, __u8 *oplock) | |
d22cbfec PS |
1021 | { |
1022 | struct smb2_create_req *req = iov[0].iov_base; | |
1023 | unsigned int num = *num_iovec; | |
1024 | ||
a41a28bd | 1025 | iov[num].iov_base = server->ops->create_lease_buf(oplock+1, *oplock); |
d22cbfec PS |
1026 | if (iov[num].iov_base == NULL) |
1027 | return -ENOMEM; | |
a41a28bd | 1028 | iov[num].iov_len = server->vals->create_lease_size; |
d22cbfec PS |
1029 | req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_LEASE; |
1030 | if (!req->CreateContextsOffset) | |
1031 | req->CreateContextsOffset = cpu_to_le32( | |
1032 | sizeof(struct smb2_create_req) - 4 + | |
1033 | iov[num - 1].iov_len); | |
a41a28bd PS |
1034 | le32_add_cpu(&req->CreateContextsLength, |
1035 | server->vals->create_lease_size); | |
1036 | inc_rfc1001_len(&req->hdr, server->vals->create_lease_size); | |
d22cbfec PS |
1037 | *num_iovec = num + 1; |
1038 | return 0; | |
1039 | } | |
1040 | ||
63eb3def | 1041 | static int |
9cbc0b73 PS |
1042 | add_durable_context(struct kvec *iov, unsigned int *num_iovec, |
1043 | struct cifs_open_parms *oparms) | |
63eb3def PS |
1044 | { |
1045 | struct smb2_create_req *req = iov[0].iov_base; | |
1046 | unsigned int num = *num_iovec; | |
1047 | ||
9cbc0b73 PS |
1048 | if (oparms->reconnect) { |
1049 | iov[num].iov_base = create_reconnect_durable_buf(oparms->fid); | |
1050 | /* indicate that we don't need to relock the file */ | |
1051 | oparms->reconnect = false; | |
1052 | } else | |
1053 | iov[num].iov_base = create_durable_buf(); | |
63eb3def PS |
1054 | if (iov[num].iov_base == NULL) |
1055 | return -ENOMEM; | |
1056 | iov[num].iov_len = sizeof(struct create_durable); | |
1057 | if (!req->CreateContextsOffset) | |
1058 | req->CreateContextsOffset = | |
1059 | cpu_to_le32(sizeof(struct smb2_create_req) - 4 + | |
1060 | iov[1].iov_len); | |
31f92e9a | 1061 | le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable)); |
63eb3def PS |
1062 | inc_rfc1001_len(&req->hdr, sizeof(struct create_durable)); |
1063 | *num_iovec = num + 1; | |
1064 | return 0; | |
1065 | } | |
1066 | ||
2503a0db | 1067 | int |
064f6047 | 1068 | SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path, |
b42bf888 PS |
1069 | __u8 *oplock, struct smb2_file_all_info *buf, |
1070 | struct smb2_err_rsp **err_buf) | |
2503a0db PS |
1071 | { |
1072 | struct smb2_create_req *req; | |
1073 | struct smb2_create_rsp *rsp; | |
1074 | struct TCP_Server_Info *server; | |
064f6047 | 1075 | struct cifs_tcon *tcon = oparms->tcon; |
2503a0db | 1076 | struct cifs_ses *ses = tcon->ses; |
63eb3def | 1077 | struct kvec iov[4]; |
2503a0db PS |
1078 | int resp_buftype; |
1079 | int uni_path_len; | |
b8c32dbb PS |
1080 | __le16 *copy_path = NULL; |
1081 | int copy_size; | |
2503a0db | 1082 | int rc = 0; |
59aa3718 | 1083 | unsigned int num_iovecs = 2; |
ca81983f | 1084 | __u32 file_attributes = 0; |
663a9621 | 1085 | char *dhc_buf = NULL, *lc_buf = NULL; |
2503a0db | 1086 | |
f96637be | 1087 | cifs_dbg(FYI, "create/open\n"); |
2503a0db PS |
1088 | |
1089 | if (ses && (ses->server)) | |
1090 | server = ses->server; | |
1091 | else | |
1092 | return -EIO; | |
1093 | ||
1094 | rc = small_smb2_init(SMB2_CREATE, tcon, (void **) &req); | |
1095 | if (rc) | |
1096 | return rc; | |
1097 | ||
064f6047 | 1098 | if (oparms->create_options & CREATE_OPTION_READONLY) |
ca81983f PS |
1099 | file_attributes |= ATTR_READONLY; |
1100 | ||
2503a0db | 1101 | req->ImpersonationLevel = IL_IMPERSONATION; |
064f6047 | 1102 | req->DesiredAccess = cpu_to_le32(oparms->desired_access); |
2503a0db PS |
1103 | /* File attributes ignored on open (used in create though) */ |
1104 | req->FileAttributes = cpu_to_le32(file_attributes); | |
1105 | req->ShareAccess = FILE_SHARE_ALL_LE; | |
064f6047 PS |
1106 | req->CreateDisposition = cpu_to_le32(oparms->disposition); |
1107 | req->CreateOptions = cpu_to_le32(oparms->create_options & CREATE_OPTIONS_MASK); | |
2503a0db | 1108 | uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2; |
59aa3718 PS |
1109 | /* do not count rfc1001 len field */ |
1110 | req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req) - 4); | |
2503a0db PS |
1111 | |
1112 | iov[0].iov_base = (char *)req; | |
1113 | /* 4 for rfc1002 length field */ | |
1114 | iov[0].iov_len = get_rfc1002_length(req) + 4; | |
1115 | ||
1116 | /* MUST set path len (NameLength) to 0 opening root of share */ | |
59aa3718 PS |
1117 | req->NameLength = cpu_to_le16(uni_path_len - 2); |
1118 | /* -1 since last byte is buf[0] which is sent below (path) */ | |
1119 | iov[0].iov_len--; | |
1120 | if (uni_path_len % 8 != 0) { | |
1121 | copy_size = uni_path_len / 8 * 8; | |
1122 | if (copy_size < uni_path_len) | |
1123 | copy_size += 8; | |
1124 | ||
1125 | copy_path = kzalloc(copy_size, GFP_KERNEL); | |
1126 | if (!copy_path) | |
1127 | return -ENOMEM; | |
1128 | memcpy((char *)copy_path, (const char *)path, | |
1129 | uni_path_len); | |
1130 | uni_path_len = copy_size; | |
1131 | path = copy_path; | |
2503a0db PS |
1132 | } |
1133 | ||
59aa3718 PS |
1134 | iov[1].iov_len = uni_path_len; |
1135 | iov[1].iov_base = path; | |
1136 | /* -1 since last byte is buf[0] which was counted in smb2_buf_len */ | |
1137 | inc_rfc1001_len(req, uni_path_len - 1); | |
1138 | ||
b8c32dbb PS |
1139 | if (!server->oplocks) |
1140 | *oplock = SMB2_OPLOCK_LEVEL_NONE; | |
1141 | ||
a41a28bd | 1142 | if (!(server->capabilities & SMB2_GLOBAL_CAP_LEASING) || |
b8c32dbb PS |
1143 | *oplock == SMB2_OPLOCK_LEVEL_NONE) |
1144 | req->RequestedOplockLevel = *oplock; | |
1145 | else { | |
a41a28bd | 1146 | rc = add_lease_context(server, iov, &num_iovecs, oplock); |
d22cbfec | 1147 | if (rc) { |
b8c32dbb PS |
1148 | cifs_small_buf_release(req); |
1149 | kfree(copy_path); | |
d22cbfec | 1150 | return rc; |
b8c32dbb | 1151 | } |
663a9621 | 1152 | lc_buf = iov[num_iovecs-1].iov_base; |
b8c32dbb PS |
1153 | } |
1154 | ||
63eb3def PS |
1155 | if (*oplock == SMB2_OPLOCK_LEVEL_BATCH) { |
1156 | /* need to set Next field of lease context if we request it */ | |
a41a28bd | 1157 | if (server->capabilities & SMB2_GLOBAL_CAP_LEASING) { |
63eb3def PS |
1158 | struct create_context *ccontext = |
1159 | (struct create_context *)iov[num_iovecs-1].iov_base; | |
1c46943f | 1160 | ccontext->Next = |
a41a28bd | 1161 | cpu_to_le32(server->vals->create_lease_size); |
63eb3def | 1162 | } |
9cbc0b73 | 1163 | rc = add_durable_context(iov, &num_iovecs, oparms); |
63eb3def PS |
1164 | if (rc) { |
1165 | cifs_small_buf_release(req); | |
1166 | kfree(copy_path); | |
663a9621 | 1167 | kfree(lc_buf); |
63eb3def PS |
1168 | return rc; |
1169 | } | |
663a9621 | 1170 | dhc_buf = iov[num_iovecs-1].iov_base; |
63eb3def PS |
1171 | } |
1172 | ||
2503a0db PS |
1173 | rc = SendReceive2(xid, ses, iov, num_iovecs, &resp_buftype, 0); |
1174 | rsp = (struct smb2_create_rsp *)iov[0].iov_base; | |
1175 | ||
1176 | if (rc != 0) { | |
1177 | cifs_stats_fail_inc(tcon, SMB2_CREATE_HE); | |
b42bf888 PS |
1178 | if (err_buf) |
1179 | *err_buf = kmemdup(rsp, get_rfc1002_length(rsp) + 4, | |
1180 | GFP_KERNEL); | |
2503a0db PS |
1181 | goto creat_exit; |
1182 | } | |
1183 | ||
064f6047 PS |
1184 | oparms->fid->persistent_fid = rsp->PersistentFileId; |
1185 | oparms->fid->volatile_fid = rsp->VolatileFileId; | |
f0df737e PS |
1186 | |
1187 | if (buf) { | |
1188 | memcpy(buf, &rsp->CreationTime, 32); | |
1189 | buf->AllocationSize = rsp->AllocationSize; | |
1190 | buf->EndOfFile = rsp->EndofFile; | |
1191 | buf->Attributes = rsp->FileAttributes; | |
1192 | buf->NumberOfLinks = cpu_to_le32(1); | |
1193 | buf->DeletePending = 0; | |
1194 | } | |
2e44b288 | 1195 | |
b8c32dbb | 1196 | if (rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE) |
42873b0a | 1197 | *oplock = parse_lease_state(server, rsp, &oparms->fid->epoch); |
b8c32dbb PS |
1198 | else |
1199 | *oplock = rsp->OplockLevel; | |
2503a0db | 1200 | creat_exit: |
b8c32dbb | 1201 | kfree(copy_path); |
663a9621 PS |
1202 | kfree(lc_buf); |
1203 | kfree(dhc_buf); | |
2503a0db PS |
1204 | free_rsp_buf(resp_buftype, rsp); |
1205 | return rc; | |
1206 | } | |
1207 | ||
4a72dafa SF |
1208 | /* |
1209 | * SMB2 IOCTL is used for both IOCTLs and FSCTLs | |
1210 | */ | |
1211 | int | |
1212 | SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, | |
1213 | u64 volatile_fid, u32 opcode, bool is_fsctl, char *in_data, | |
1214 | u32 indatalen, char **out_data, u32 *plen /* returned data len */) | |
1215 | { | |
1216 | struct smb2_ioctl_req *req; | |
1217 | struct smb2_ioctl_rsp *rsp; | |
1218 | struct TCP_Server_Info *server; | |
1219 | struct cifs_ses *ses = tcon->ses; | |
1220 | struct kvec iov[2]; | |
1221 | int resp_buftype; | |
1222 | int num_iovecs; | |
1223 | int rc = 0; | |
1224 | ||
1225 | cifs_dbg(FYI, "SMB2 IOCTL\n"); | |
1226 | ||
7ff8d45c | 1227 | *out_data = NULL; |
4a72dafa SF |
1228 | /* zero out returned data len, in case of error */ |
1229 | if (plen) | |
1230 | *plen = 0; | |
1231 | ||
1232 | if (ses && (ses->server)) | |
1233 | server = ses->server; | |
1234 | else | |
1235 | return -EIO; | |
1236 | ||
1237 | rc = small_smb2_init(SMB2_IOCTL, tcon, (void **) &req); | |
1238 | if (rc) | |
1239 | return rc; | |
1240 | ||
1241 | req->CtlCode = cpu_to_le32(opcode); | |
1242 | req->PersistentFileId = persistent_fid; | |
1243 | req->VolatileFileId = volatile_fid; | |
1244 | ||
1245 | if (indatalen) { | |
1246 | req->InputCount = cpu_to_le32(indatalen); | |
1247 | /* do not set InputOffset if no input data */ | |
1248 | req->InputOffset = | |
1249 | cpu_to_le32(offsetof(struct smb2_ioctl_req, Buffer) - 4); | |
1250 | iov[1].iov_base = in_data; | |
1251 | iov[1].iov_len = indatalen; | |
1252 | num_iovecs = 2; | |
1253 | } else | |
1254 | num_iovecs = 1; | |
1255 | ||
1256 | req->OutputOffset = 0; | |
1257 | req->OutputCount = 0; /* MBZ */ | |
1258 | ||
1259 | /* | |
1260 | * Could increase MaxOutputResponse, but that would require more | |
1261 | * than one credit. Windows typically sets this smaller, but for some | |
1262 | * ioctls it may be useful to allow server to send more. No point | |
1263 | * limiting what the server can send as long as fits in one credit | |
1264 | */ | |
1265 | req->MaxOutputResponse = cpu_to_le32(0xFF00); /* < 64K uses 1 credit */ | |
1266 | ||
1267 | if (is_fsctl) | |
1268 | req->Flags = cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL); | |
1269 | else | |
1270 | req->Flags = 0; | |
1271 | ||
1272 | iov[0].iov_base = (char *)req; | |
4a72dafa | 1273 | |
7ff8d45c SF |
1274 | /* |
1275 | * If no input data, the size of ioctl struct in | |
1276 | * protocol spec still includes a 1 byte data buffer, | |
1277 | * but if input data passed to ioctl, we do not | |
1278 | * want to double count this, so we do not send | |
1279 | * the dummy one byte of data in iovec[0] if sending | |
1280 | * input data (in iovec[1]). We also must add 4 bytes | |
1281 | * in first iovec to allow for rfc1002 length field. | |
1282 | */ | |
1283 | ||
1284 | if (indatalen) { | |
1285 | iov[0].iov_len = get_rfc1002_length(req) + 4 - 1; | |
1286 | inc_rfc1001_len(req, indatalen - 1); | |
1287 | } else | |
1288 | iov[0].iov_len = get_rfc1002_length(req) + 4; | |
1289 | ||
4a72dafa SF |
1290 | |
1291 | rc = SendReceive2(xid, ses, iov, num_iovecs, &resp_buftype, 0); | |
1292 | rsp = (struct smb2_ioctl_rsp *)iov[0].iov_base; | |
1293 | ||
9bf0c9cd | 1294 | if ((rc != 0) && (rc != -EINVAL)) { |
4a72dafa SF |
1295 | if (tcon) |
1296 | cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE); | |
1297 | goto ioctl_exit; | |
9bf0c9cd SF |
1298 | } else if (rc == -EINVAL) { |
1299 | if ((opcode != FSCTL_SRV_COPYCHUNK_WRITE) && | |
1300 | (opcode != FSCTL_SRV_COPYCHUNK)) { | |
1301 | if (tcon) | |
1302 | cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE); | |
1303 | goto ioctl_exit; | |
1304 | } | |
4a72dafa SF |
1305 | } |
1306 | ||
1307 | /* check if caller wants to look at return data or just return rc */ | |
1308 | if ((plen == NULL) || (out_data == NULL)) | |
1309 | goto ioctl_exit; | |
1310 | ||
1311 | *plen = le32_to_cpu(rsp->OutputCount); | |
1312 | ||
1313 | /* We check for obvious errors in the output buffer length and offset */ | |
1314 | if (*plen == 0) | |
1315 | goto ioctl_exit; /* server returned no data */ | |
1316 | else if (*plen > 0xFF00) { | |
1317 | cifs_dbg(VFS, "srv returned invalid ioctl length: %d\n", *plen); | |
1318 | *plen = 0; | |
1319 | rc = -EIO; | |
1320 | goto ioctl_exit; | |
1321 | } | |
1322 | ||
1323 | if (get_rfc1002_length(rsp) < le32_to_cpu(rsp->OutputOffset) + *plen) { | |
1324 | cifs_dbg(VFS, "Malformed ioctl resp: len %d offset %d\n", *plen, | |
1325 | le32_to_cpu(rsp->OutputOffset)); | |
1326 | *plen = 0; | |
1327 | rc = -EIO; | |
1328 | goto ioctl_exit; | |
1329 | } | |
1330 | ||
1331 | *out_data = kmalloc(*plen, GFP_KERNEL); | |
1332 | if (*out_data == NULL) { | |
1333 | rc = -ENOMEM; | |
1334 | goto ioctl_exit; | |
1335 | } | |
1336 | ||
1337 | memcpy(*out_data, rsp->hdr.ProtocolId + le32_to_cpu(rsp->OutputOffset), | |
1338 | *plen); | |
1339 | ioctl_exit: | |
1340 | free_rsp_buf(resp_buftype, rsp); | |
1341 | return rc; | |
1342 | } | |
1343 | ||
64a5cfa6 SF |
1344 | /* |
1345 | * Individual callers to ioctl worker function follow | |
1346 | */ | |
1347 | ||
1348 | int | |
1349 | SMB2_set_compression(const unsigned int xid, struct cifs_tcon *tcon, | |
1350 | u64 persistent_fid, u64 volatile_fid) | |
1351 | { | |
1352 | int rc; | |
64a5cfa6 SF |
1353 | struct compress_ioctl fsctl_input; |
1354 | char *ret_data = NULL; | |
1355 | ||
1356 | fsctl_input.CompressionState = | |
1357 | __constant_cpu_to_le16(COMPRESSION_FORMAT_DEFAULT); | |
1358 | ||
1359 | rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid, | |
1360 | FSCTL_SET_COMPRESSION, true /* is_fsctl */, | |
1361 | (char *)&fsctl_input /* data input */, | |
1362 | 2 /* in data len */, &ret_data /* out data */, NULL); | |
1363 | ||
1364 | cifs_dbg(FYI, "set compression rc %d\n", rc); | |
64a5cfa6 SF |
1365 | |
1366 | return rc; | |
1367 | } | |
1368 | ||
2503a0db PS |
1369 | int |
1370 | SMB2_close(const unsigned int xid, struct cifs_tcon *tcon, | |
1371 | u64 persistent_fid, u64 volatile_fid) | |
1372 | { | |
1373 | struct smb2_close_req *req; | |
1374 | struct smb2_close_rsp *rsp; | |
1375 | struct TCP_Server_Info *server; | |
1376 | struct cifs_ses *ses = tcon->ses; | |
1377 | struct kvec iov[1]; | |
1378 | int resp_buftype; | |
1379 | int rc = 0; | |
1380 | ||
f96637be | 1381 | cifs_dbg(FYI, "Close\n"); |
2503a0db PS |
1382 | |
1383 | if (ses && (ses->server)) | |
1384 | server = ses->server; | |
1385 | else | |
1386 | return -EIO; | |
1387 | ||
1388 | rc = small_smb2_init(SMB2_CLOSE, tcon, (void **) &req); | |
1389 | if (rc) | |
1390 | return rc; | |
1391 | ||
1392 | req->PersistentFileId = persistent_fid; | |
1393 | req->VolatileFileId = volatile_fid; | |
1394 | ||
1395 | iov[0].iov_base = (char *)req; | |
1396 | /* 4 for rfc1002 length field */ | |
1397 | iov[0].iov_len = get_rfc1002_length(req) + 4; | |
1398 | ||
1399 | rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0); | |
1400 | rsp = (struct smb2_close_rsp *)iov[0].iov_base; | |
1401 | ||
1402 | if (rc != 0) { | |
1403 | if (tcon) | |
1404 | cifs_stats_fail_inc(tcon, SMB2_CLOSE_HE); | |
1405 | goto close_exit; | |
1406 | } | |
1407 | ||
2503a0db PS |
1408 | /* BB FIXME - decode close response, update inode for caching */ |
1409 | ||
1410 | close_exit: | |
1411 | free_rsp_buf(resp_buftype, rsp); | |
1412 | return rc; | |
1413 | } | |
be4cb9e3 PS |
1414 | |
1415 | static int | |
1416 | validate_buf(unsigned int offset, unsigned int buffer_length, | |
1417 | struct smb2_hdr *hdr, unsigned int min_buf_size) | |
1418 | ||
1419 | { | |
1420 | unsigned int smb_len = be32_to_cpu(hdr->smb2_buf_length); | |
1421 | char *end_of_smb = smb_len + 4 /* RFC1001 length field */ + (char *)hdr; | |
1422 | char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr; | |
1423 | char *end_of_buf = begin_of_buf + buffer_length; | |
1424 | ||
1425 | ||
1426 | if (buffer_length < min_buf_size) { | |
f96637be JP |
1427 | cifs_dbg(VFS, "buffer length %d smaller than minimum size %d\n", |
1428 | buffer_length, min_buf_size); | |
be4cb9e3 PS |
1429 | return -EINVAL; |
1430 | } | |
1431 | ||
1432 | /* check if beyond RFC1001 maximum length */ | |
1433 | if ((smb_len > 0x7FFFFF) || (buffer_length > 0x7FFFFF)) { | |
f96637be JP |
1434 | cifs_dbg(VFS, "buffer length %d or smb length %d too large\n", |
1435 | buffer_length, smb_len); | |
be4cb9e3 PS |
1436 | return -EINVAL; |
1437 | } | |
1438 | ||
1439 | if ((begin_of_buf > end_of_smb) || (end_of_buf > end_of_smb)) { | |
f96637be | 1440 | cifs_dbg(VFS, "illegal server response, bad offset to data\n"); |
be4cb9e3 PS |
1441 | return -EINVAL; |
1442 | } | |
1443 | ||
1444 | return 0; | |
1445 | } | |
1446 | ||
1447 | /* | |
1448 | * If SMB buffer fields are valid, copy into temporary buffer to hold result. | |
1449 | * Caller must free buffer. | |
1450 | */ | |
1451 | static int | |
1452 | validate_and_copy_buf(unsigned int offset, unsigned int buffer_length, | |
1453 | struct smb2_hdr *hdr, unsigned int minbufsize, | |
1454 | char *data) | |
1455 | ||
1456 | { | |
1457 | char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr; | |
1458 | int rc; | |
1459 | ||
1460 | if (!data) | |
1461 | return -EINVAL; | |
1462 | ||
1463 | rc = validate_buf(offset, buffer_length, hdr, minbufsize); | |
1464 | if (rc) | |
1465 | return rc; | |
1466 | ||
1467 | memcpy(data, begin_of_buf, buffer_length); | |
1468 | ||
1469 | return 0; | |
1470 | } | |
1471 | ||
f0df737e PS |
1472 | static int |
1473 | query_info(const unsigned int xid, struct cifs_tcon *tcon, | |
1474 | u64 persistent_fid, u64 volatile_fid, u8 info_class, | |
1475 | size_t output_len, size_t min_len, void *data) | |
be4cb9e3 PS |
1476 | { |
1477 | struct smb2_query_info_req *req; | |
1478 | struct smb2_query_info_rsp *rsp = NULL; | |
1479 | struct kvec iov[2]; | |
1480 | int rc = 0; | |
1481 | int resp_buftype; | |
1482 | struct TCP_Server_Info *server; | |
1483 | struct cifs_ses *ses = tcon->ses; | |
1484 | ||
f96637be | 1485 | cifs_dbg(FYI, "Query Info\n"); |
be4cb9e3 PS |
1486 | |
1487 | if (ses && (ses->server)) | |
1488 | server = ses->server; | |
1489 | else | |
1490 | return -EIO; | |
1491 | ||
1492 | rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req); | |
1493 | if (rc) | |
1494 | return rc; | |
1495 | ||
1496 | req->InfoType = SMB2_O_INFO_FILE; | |
f0df737e | 1497 | req->FileInfoClass = info_class; |
be4cb9e3 PS |
1498 | req->PersistentFileId = persistent_fid; |
1499 | req->VolatileFileId = volatile_fid; | |
1500 | /* 4 for rfc1002 length field and 1 for Buffer */ | |
1501 | req->InputBufferOffset = | |
1502 | cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4); | |
f0df737e | 1503 | req->OutputBufferLength = cpu_to_le32(output_len); |
be4cb9e3 PS |
1504 | |
1505 | iov[0].iov_base = (char *)req; | |
1506 | /* 4 for rfc1002 length field */ | |
1507 | iov[0].iov_len = get_rfc1002_length(req) + 4; | |
1508 | ||
1509 | rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0); | |
e5d04887 PS |
1510 | rsp = (struct smb2_query_info_rsp *)iov[0].iov_base; |
1511 | ||
be4cb9e3 PS |
1512 | if (rc) { |
1513 | cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE); | |
1514 | goto qinf_exit; | |
1515 | } | |
1516 | ||
be4cb9e3 PS |
1517 | rc = validate_and_copy_buf(le16_to_cpu(rsp->OutputBufferOffset), |
1518 | le32_to_cpu(rsp->OutputBufferLength), | |
f0df737e | 1519 | &rsp->hdr, min_len, data); |
be4cb9e3 PS |
1520 | |
1521 | qinf_exit: | |
1522 | free_rsp_buf(resp_buftype, rsp); | |
1523 | return rc; | |
1524 | } | |
9094fad1 | 1525 | |
f0df737e PS |
1526 | int |
1527 | SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon, | |
1528 | u64 persistent_fid, u64 volatile_fid, | |
1529 | struct smb2_file_all_info *data) | |
1530 | { | |
1531 | return query_info(xid, tcon, persistent_fid, volatile_fid, | |
1532 | FILE_ALL_INFORMATION, | |
1533 | sizeof(struct smb2_file_all_info) + MAX_NAME * 2, | |
1534 | sizeof(struct smb2_file_all_info), data); | |
1535 | } | |
1536 | ||
1537 | int | |
1538 | SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon, | |
1539 | u64 persistent_fid, u64 volatile_fid, __le64 *uniqueid) | |
1540 | { | |
1541 | return query_info(xid, tcon, persistent_fid, volatile_fid, | |
1542 | FILE_INTERNAL_INFORMATION, | |
1543 | sizeof(struct smb2_file_internal_info), | |
1544 | sizeof(struct smb2_file_internal_info), uniqueid); | |
1545 | } | |
1546 | ||
9094fad1 PS |
1547 | /* |
1548 | * This is a no-op for now. We're not really interested in the reply, but | |
1549 | * rather in the fact that the server sent one and that server->lstrp | |
1550 | * gets updated. | |
1551 | * | |
1552 | * FIXME: maybe we should consider checking that the reply matches request? | |
1553 | */ | |
1554 | static void | |
1555 | smb2_echo_callback(struct mid_q_entry *mid) | |
1556 | { | |
1557 | struct TCP_Server_Info *server = mid->callback_data; | |
1558 | struct smb2_echo_rsp *smb2 = (struct smb2_echo_rsp *)mid->resp_buf; | |
1559 | unsigned int credits_received = 1; | |
1560 | ||
1561 | if (mid->mid_state == MID_RESPONSE_RECEIVED) | |
1562 | credits_received = le16_to_cpu(smb2->hdr.CreditRequest); | |
1563 | ||
1564 | DeleteMidQEntry(mid); | |
1565 | add_credits(server, credits_received, CIFS_ECHO_OP); | |
1566 | } | |
1567 | ||
1568 | int | |
1569 | SMB2_echo(struct TCP_Server_Info *server) | |
1570 | { | |
1571 | struct smb2_echo_req *req; | |
1572 | int rc = 0; | |
1573 | struct kvec iov; | |
fec344e3 JL |
1574 | struct smb_rqst rqst = { .rq_iov = &iov, |
1575 | .rq_nvec = 1 }; | |
9094fad1 | 1576 | |
f96637be | 1577 | cifs_dbg(FYI, "In echo request\n"); |
9094fad1 PS |
1578 | |
1579 | rc = small_smb2_init(SMB2_ECHO, NULL, (void **)&req); | |
1580 | if (rc) | |
1581 | return rc; | |
1582 | ||
1583 | req->hdr.CreditRequest = cpu_to_le16(1); | |
1584 | ||
1585 | iov.iov_base = (char *)req; | |
1586 | /* 4 for rfc1002 length field */ | |
1587 | iov.iov_len = get_rfc1002_length(req) + 4; | |
1588 | ||
fec344e3 | 1589 | rc = cifs_call_async(server, &rqst, NULL, smb2_echo_callback, server, |
9094fad1 PS |
1590 | CIFS_ECHO_OP); |
1591 | if (rc) | |
f96637be | 1592 | cifs_dbg(FYI, "Echo request failed: %d\n", rc); |
9094fad1 PS |
1593 | |
1594 | cifs_small_buf_release(req); | |
1595 | return rc; | |
1596 | } | |
7a5cfb19 PS |
1597 | |
1598 | int | |
1599 | SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, | |
1600 | u64 volatile_fid) | |
1601 | { | |
1602 | struct smb2_flush_req *req; | |
1603 | struct TCP_Server_Info *server; | |
1604 | struct cifs_ses *ses = tcon->ses; | |
1605 | struct kvec iov[1]; | |
1606 | int resp_buftype; | |
1607 | int rc = 0; | |
1608 | ||
f96637be | 1609 | cifs_dbg(FYI, "Flush\n"); |
7a5cfb19 PS |
1610 | |
1611 | if (ses && (ses->server)) | |
1612 | server = ses->server; | |
1613 | else | |
1614 | return -EIO; | |
1615 | ||
1616 | rc = small_smb2_init(SMB2_FLUSH, tcon, (void **) &req); | |
1617 | if (rc) | |
1618 | return rc; | |
1619 | ||
1620 | req->PersistentFileId = persistent_fid; | |
1621 | req->VolatileFileId = volatile_fid; | |
1622 | ||
1623 | iov[0].iov_base = (char *)req; | |
1624 | /* 4 for rfc1002 length field */ | |
1625 | iov[0].iov_len = get_rfc1002_length(req) + 4; | |
1626 | ||
1627 | rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0); | |
1628 | ||
1629 | if ((rc != 0) && tcon) | |
1630 | cifs_stats_fail_inc(tcon, SMB2_FLUSH_HE); | |
1631 | ||
1632 | free_rsp_buf(resp_buftype, iov[0].iov_base); | |
1633 | return rc; | |
1634 | } | |
09a4707e PS |
1635 | |
1636 | /* | |
1637 | * To form a chain of read requests, any read requests after the first should | |
1638 | * have the end_of_chain boolean set to true. | |
1639 | */ | |
1640 | static int | |
1641 | smb2_new_read_req(struct kvec *iov, struct cifs_io_parms *io_parms, | |
1642 | unsigned int remaining_bytes, int request_type) | |
1643 | { | |
1644 | int rc = -EACCES; | |
1645 | struct smb2_read_req *req = NULL; | |
1646 | ||
1647 | rc = small_smb2_init(SMB2_READ, io_parms->tcon, (void **) &req); | |
1648 | if (rc) | |
1649 | return rc; | |
1650 | if (io_parms->tcon->ses->server == NULL) | |
1651 | return -ECONNABORTED; | |
1652 | ||
1653 | req->hdr.ProcessId = cpu_to_le32(io_parms->pid); | |
1654 | ||
1655 | req->PersistentFileId = io_parms->persistent_fid; | |
1656 | req->VolatileFileId = io_parms->volatile_fid; | |
1657 | req->ReadChannelInfoOffset = 0; /* reserved */ | |
1658 | req->ReadChannelInfoLength = 0; /* reserved */ | |
1659 | req->Channel = 0; /* reserved */ | |
1660 | req->MinimumCount = 0; | |
1661 | req->Length = cpu_to_le32(io_parms->length); | |
1662 | req->Offset = cpu_to_le64(io_parms->offset); | |
1663 | ||
1664 | if (request_type & CHAINED_REQUEST) { | |
1665 | if (!(request_type & END_OF_CHAIN)) { | |
1666 | /* 4 for rfc1002 length field */ | |
1667 | req->hdr.NextCommand = | |
1668 | cpu_to_le32(get_rfc1002_length(req) + 4); | |
1669 | } else /* END_OF_CHAIN */ | |
1670 | req->hdr.NextCommand = 0; | |
1671 | if (request_type & RELATED_REQUEST) { | |
1672 | req->hdr.Flags |= SMB2_FLAGS_RELATED_OPERATIONS; | |
1673 | /* | |
1674 | * Related requests use info from previous read request | |
1675 | * in chain. | |
1676 | */ | |
1677 | req->hdr.SessionId = 0xFFFFFFFF; | |
1678 | req->hdr.TreeId = 0xFFFFFFFF; | |
1679 | req->PersistentFileId = 0xFFFFFFFF; | |
1680 | req->VolatileFileId = 0xFFFFFFFF; | |
1681 | } | |
1682 | } | |
1683 | if (remaining_bytes > io_parms->length) | |
1684 | req->RemainingBytes = cpu_to_le32(remaining_bytes); | |
1685 | else | |
1686 | req->RemainingBytes = 0; | |
1687 | ||
1688 | iov[0].iov_base = (char *)req; | |
1689 | /* 4 for rfc1002 length field */ | |
1690 | iov[0].iov_len = get_rfc1002_length(req) + 4; | |
1691 | return rc; | |
1692 | } | |
1693 | ||
1694 | static void | |
1695 | smb2_readv_callback(struct mid_q_entry *mid) | |
1696 | { | |
1697 | struct cifs_readdata *rdata = mid->callback_data; | |
1698 | struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink); | |
1699 | struct TCP_Server_Info *server = tcon->ses->server; | |
5819575e | 1700 | struct smb2_hdr *buf = (struct smb2_hdr *)rdata->iov.iov_base; |
09a4707e | 1701 | unsigned int credits_received = 1; |
5819575e | 1702 | struct smb_rqst rqst = { .rq_iov = &rdata->iov, |
8321fec4 JL |
1703 | .rq_nvec = 1, |
1704 | .rq_pages = rdata->pages, | |
1705 | .rq_npages = rdata->nr_pages, | |
1706 | .rq_pagesz = rdata->pagesz, | |
1707 | .rq_tailsz = rdata->tailsz }; | |
09a4707e | 1708 | |
f96637be JP |
1709 | cifs_dbg(FYI, "%s: mid=%llu state=%d result=%d bytes=%u\n", |
1710 | __func__, mid->mid, mid->mid_state, rdata->result, | |
1711 | rdata->bytes); | |
09a4707e PS |
1712 | |
1713 | switch (mid->mid_state) { | |
1714 | case MID_RESPONSE_RECEIVED: | |
1715 | credits_received = le16_to_cpu(buf->CreditRequest); | |
1716 | /* result already set, check signature */ | |
38d77c50 | 1717 | if (server->sign) { |
3c1bf7e4 PS |
1718 | int rc; |
1719 | ||
0b688cfc | 1720 | rc = smb2_verify_signature(&rqst, server); |
3c1bf7e4 | 1721 | if (rc) |
f96637be JP |
1722 | cifs_dbg(VFS, "SMB signature verification returned error = %d\n", |
1723 | rc); | |
3c1bf7e4 | 1724 | } |
09a4707e PS |
1725 | /* FIXME: should this be counted toward the initiating task? */ |
1726 | task_io_account_read(rdata->bytes); | |
1727 | cifs_stats_bytes_read(tcon, rdata->bytes); | |
1728 | break; | |
1729 | case MID_REQUEST_SUBMITTED: | |
1730 | case MID_RETRY_NEEDED: | |
1731 | rdata->result = -EAGAIN; | |
1732 | break; | |
1733 | default: | |
1734 | if (rdata->result != -ENODATA) | |
1735 | rdata->result = -EIO; | |
1736 | } | |
1737 | ||
1738 | if (rdata->result) | |
1739 | cifs_stats_fail_inc(tcon, SMB2_READ_HE); | |
1740 | ||
1741 | queue_work(cifsiod_wq, &rdata->work); | |
1742 | DeleteMidQEntry(mid); | |
1743 | add_credits(server, credits_received, 0); | |
1744 | } | |
1745 | ||
1746 | /* smb2_async_readv - send an async write, and set up mid to handle result */ | |
1747 | int | |
1748 | smb2_async_readv(struct cifs_readdata *rdata) | |
1749 | { | |
bed9da02 | 1750 | int rc, flags = 0; |
09a4707e PS |
1751 | struct smb2_hdr *buf; |
1752 | struct cifs_io_parms io_parms; | |
5819575e | 1753 | struct smb_rqst rqst = { .rq_iov = &rdata->iov, |
fec344e3 | 1754 | .rq_nvec = 1 }; |
bed9da02 | 1755 | struct TCP_Server_Info *server; |
09a4707e | 1756 | |
f96637be JP |
1757 | cifs_dbg(FYI, "%s: offset=%llu bytes=%u\n", |
1758 | __func__, rdata->offset, rdata->bytes); | |
09a4707e PS |
1759 | |
1760 | io_parms.tcon = tlink_tcon(rdata->cfile->tlink); | |
1761 | io_parms.offset = rdata->offset; | |
1762 | io_parms.length = rdata->bytes; | |
1763 | io_parms.persistent_fid = rdata->cfile->fid.persistent_fid; | |
1764 | io_parms.volatile_fid = rdata->cfile->fid.volatile_fid; | |
1765 | io_parms.pid = rdata->pid; | |
bed9da02 PS |
1766 | |
1767 | server = io_parms.tcon->ses->server; | |
1768 | ||
5819575e | 1769 | rc = smb2_new_read_req(&rdata->iov, &io_parms, 0, 0); |
bed9da02 PS |
1770 | if (rc) { |
1771 | if (rc == -EAGAIN && rdata->credits) { | |
1772 | /* credits was reset by reconnect */ | |
1773 | rdata->credits = 0; | |
1774 | /* reduce in_flight value since we won't send the req */ | |
1775 | spin_lock(&server->req_lock); | |
1776 | server->in_flight--; | |
1777 | spin_unlock(&server->req_lock); | |
1778 | } | |
09a4707e | 1779 | return rc; |
bed9da02 | 1780 | } |
09a4707e | 1781 | |
5819575e | 1782 | buf = (struct smb2_hdr *)rdata->iov.iov_base; |
09a4707e | 1783 | /* 4 for rfc1002 length field */ |
5819575e | 1784 | rdata->iov.iov_len = get_rfc1002_length(rdata->iov.iov_base) + 4; |
09a4707e | 1785 | |
bed9da02 PS |
1786 | if (rdata->credits) { |
1787 | buf->CreditCharge = cpu_to_le16(DIV_ROUND_UP(rdata->bytes, | |
1788 | SMB2_MAX_BUFFER_SIZE)); | |
1789 | spin_lock(&server->req_lock); | |
1790 | server->credits += rdata->credits - | |
1791 | le16_to_cpu(buf->CreditCharge); | |
1792 | spin_unlock(&server->req_lock); | |
1793 | wake_up(&server->request_q); | |
1794 | flags = CIFS_HAS_CREDITS; | |
1795 | } | |
1796 | ||
09a4707e | 1797 | kref_get(&rdata->refcount); |
fec344e3 | 1798 | rc = cifs_call_async(io_parms.tcon->ses->server, &rqst, |
09a4707e | 1799 | cifs_readv_receive, smb2_readv_callback, |
bed9da02 | 1800 | rdata, flags); |
e5d04887 | 1801 | if (rc) { |
09a4707e | 1802 | kref_put(&rdata->refcount, cifs_readdata_release); |
e5d04887 PS |
1803 | cifs_stats_fail_inc(io_parms.tcon, SMB2_READ_HE); |
1804 | } | |
09a4707e PS |
1805 | |
1806 | cifs_small_buf_release(buf); | |
1807 | return rc; | |
1808 | } | |
33319141 | 1809 | |
d8e05039 PS |
1810 | int |
1811 | SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms, | |
1812 | unsigned int *nbytes, char **buf, int *buf_type) | |
1813 | { | |
1814 | int resp_buftype, rc = -EACCES; | |
1815 | struct smb2_read_rsp *rsp = NULL; | |
1816 | struct kvec iov[1]; | |
1817 | ||
1818 | *nbytes = 0; | |
1819 | rc = smb2_new_read_req(iov, io_parms, 0, 0); | |
1820 | if (rc) | |
1821 | return rc; | |
1822 | ||
1823 | rc = SendReceive2(xid, io_parms->tcon->ses, iov, 1, | |
1824 | &resp_buftype, CIFS_LOG_ERROR); | |
1825 | ||
1826 | rsp = (struct smb2_read_rsp *)iov[0].iov_base; | |
1827 | ||
1828 | if (rsp->hdr.Status == STATUS_END_OF_FILE) { | |
1829 | free_rsp_buf(resp_buftype, iov[0].iov_base); | |
1830 | return 0; | |
1831 | } | |
1832 | ||
1833 | if (rc) { | |
1834 | cifs_stats_fail_inc(io_parms->tcon, SMB2_READ_HE); | |
f96637be | 1835 | cifs_dbg(VFS, "Send error in read = %d\n", rc); |
d8e05039 PS |
1836 | } else { |
1837 | *nbytes = le32_to_cpu(rsp->DataLength); | |
1838 | if ((*nbytes > CIFS_MAX_MSGSIZE) || | |
1839 | (*nbytes > io_parms->length)) { | |
f96637be JP |
1840 | cifs_dbg(FYI, "bad length %d for count %d\n", |
1841 | *nbytes, io_parms->length); | |
d8e05039 PS |
1842 | rc = -EIO; |
1843 | *nbytes = 0; | |
1844 | } | |
1845 | } | |
1846 | ||
1847 | if (*buf) { | |
1848 | memcpy(*buf, (char *)rsp->hdr.ProtocolId + rsp->DataOffset, | |
1849 | *nbytes); | |
1850 | free_rsp_buf(resp_buftype, iov[0].iov_base); | |
1851 | } else if (resp_buftype != CIFS_NO_BUFFER) { | |
1852 | *buf = iov[0].iov_base; | |
1853 | if (resp_buftype == CIFS_SMALL_BUFFER) | |
1854 | *buf_type = CIFS_SMALL_BUFFER; | |
1855 | else if (resp_buftype == CIFS_LARGE_BUFFER) | |
1856 | *buf_type = CIFS_LARGE_BUFFER; | |
1857 | } | |
1858 | return rc; | |
1859 | } | |
1860 | ||
33319141 PS |
1861 | /* |
1862 | * Check the mid_state and signature on received buffer (if any), and queue the | |
1863 | * workqueue completion task. | |
1864 | */ | |
1865 | static void | |
1866 | smb2_writev_callback(struct mid_q_entry *mid) | |
1867 | { | |
1868 | struct cifs_writedata *wdata = mid->callback_data; | |
1869 | struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink); | |
1870 | unsigned int written; | |
1871 | struct smb2_write_rsp *rsp = (struct smb2_write_rsp *)mid->resp_buf; | |
1872 | unsigned int credits_received = 1; | |
1873 | ||
1874 | switch (mid->mid_state) { | |
1875 | case MID_RESPONSE_RECEIVED: | |
1876 | credits_received = le16_to_cpu(rsp->hdr.CreditRequest); | |
1877 | wdata->result = smb2_check_receive(mid, tcon->ses->server, 0); | |
1878 | if (wdata->result != 0) | |
1879 | break; | |
1880 | ||
1881 | written = le32_to_cpu(rsp->DataLength); | |
1882 | /* | |
1883 | * Mask off high 16 bits when bytes written as returned | |
1884 | * by the server is greater than bytes requested by the | |
1885 | * client. OS/2 servers are known to set incorrect | |
1886 | * CountHigh values. | |
1887 | */ | |
1888 | if (written > wdata->bytes) | |
1889 | written &= 0xFFFF; | |
1890 | ||
1891 | if (written < wdata->bytes) | |
1892 | wdata->result = -ENOSPC; | |
1893 | else | |
1894 | wdata->bytes = written; | |
1895 | break; | |
1896 | case MID_REQUEST_SUBMITTED: | |
1897 | case MID_RETRY_NEEDED: | |
1898 | wdata->result = -EAGAIN; | |
1899 | break; | |
1900 | default: | |
1901 | wdata->result = -EIO; | |
1902 | break; | |
1903 | } | |
1904 | ||
1905 | if (wdata->result) | |
1906 | cifs_stats_fail_inc(tcon, SMB2_WRITE_HE); | |
1907 | ||
1908 | queue_work(cifsiod_wq, &wdata->work); | |
1909 | DeleteMidQEntry(mid); | |
1910 | add_credits(tcon->ses->server, credits_received, 0); | |
1911 | } | |
1912 | ||
1913 | /* smb2_async_writev - send an async write, and set up mid to handle result */ | |
1914 | int | |
4a5c80d7 SF |
1915 | smb2_async_writev(struct cifs_writedata *wdata, |
1916 | void (*release)(struct kref *kref)) | |
33319141 | 1917 | { |
cb7e9eab | 1918 | int rc = -EACCES, flags = 0; |
33319141 PS |
1919 | struct smb2_write_req *req = NULL; |
1920 | struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink); | |
cb7e9eab | 1921 | struct TCP_Server_Info *server = tcon->ses->server; |
eddb079d | 1922 | struct kvec iov; |
fec344e3 | 1923 | struct smb_rqst rqst; |
33319141 PS |
1924 | |
1925 | rc = small_smb2_init(SMB2_WRITE, tcon, (void **) &req); | |
cb7e9eab PS |
1926 | if (rc) { |
1927 | if (rc == -EAGAIN && wdata->credits) { | |
1928 | /* credits was reset by reconnect */ | |
1929 | wdata->credits = 0; | |
1930 | /* reduce in_flight value since we won't send the req */ | |
1931 | spin_lock(&server->req_lock); | |
1932 | server->in_flight--; | |
1933 | spin_unlock(&server->req_lock); | |
1934 | } | |
33319141 | 1935 | goto async_writev_out; |
cb7e9eab | 1936 | } |
33319141 | 1937 | |
33319141 PS |
1938 | req->hdr.ProcessId = cpu_to_le32(wdata->cfile->pid); |
1939 | ||
1940 | req->PersistentFileId = wdata->cfile->fid.persistent_fid; | |
1941 | req->VolatileFileId = wdata->cfile->fid.volatile_fid; | |
1942 | req->WriteChannelInfoOffset = 0; | |
1943 | req->WriteChannelInfoLength = 0; | |
1944 | req->Channel = 0; | |
1945 | req->Offset = cpu_to_le64(wdata->offset); | |
1946 | /* 4 for rfc1002 length field */ | |
1947 | req->DataOffset = cpu_to_le16( | |
1948 | offsetof(struct smb2_write_req, Buffer) - 4); | |
1949 | req->RemainingBytes = 0; | |
1950 | ||
1951 | /* 4 for rfc1002 length field and 1 for Buffer */ | |
eddb079d JL |
1952 | iov.iov_len = get_rfc1002_length(req) + 4 - 1; |
1953 | iov.iov_base = req; | |
33319141 | 1954 | |
eddb079d JL |
1955 | rqst.rq_iov = &iov; |
1956 | rqst.rq_nvec = 1; | |
1957 | rqst.rq_pages = wdata->pages; | |
1958 | rqst.rq_npages = wdata->nr_pages; | |
1959 | rqst.rq_pagesz = wdata->pagesz; | |
1960 | rqst.rq_tailsz = wdata->tailsz; | |
33319141 | 1961 | |
f96637be JP |
1962 | cifs_dbg(FYI, "async write at %llu %u bytes\n", |
1963 | wdata->offset, wdata->bytes); | |
33319141 PS |
1964 | |
1965 | req->Length = cpu_to_le32(wdata->bytes); | |
1966 | ||
1967 | inc_rfc1001_len(&req->hdr, wdata->bytes - 1 /* Buffer */); | |
1968 | ||
cb7e9eab PS |
1969 | if (wdata->credits) { |
1970 | req->hdr.CreditCharge = cpu_to_le16(DIV_ROUND_UP(wdata->bytes, | |
1971 | SMB2_MAX_BUFFER_SIZE)); | |
1972 | spin_lock(&server->req_lock); | |
1973 | server->credits += wdata->credits - | |
1974 | le16_to_cpu(req->hdr.CreditCharge); | |
1975 | spin_unlock(&server->req_lock); | |
1976 | wake_up(&server->request_q); | |
1977 | flags = CIFS_HAS_CREDITS; | |
1978 | } | |
1979 | ||
33319141 | 1980 | kref_get(&wdata->refcount); |
cb7e9eab PS |
1981 | rc = cifs_call_async(server, &rqst, NULL, smb2_writev_callback, wdata, |
1982 | flags); | |
33319141 | 1983 | |
e5d04887 | 1984 | if (rc) { |
4a5c80d7 | 1985 | kref_put(&wdata->refcount, release); |
e5d04887 PS |
1986 | cifs_stats_fail_inc(tcon, SMB2_WRITE_HE); |
1987 | } | |
33319141 | 1988 | |
33319141 PS |
1989 | async_writev_out: |
1990 | cifs_small_buf_release(req); | |
33319141 PS |
1991 | return rc; |
1992 | } | |
009d3443 PS |
1993 | |
1994 | /* | |
1995 | * SMB2_write function gets iov pointer to kvec array with n_vec as a length. | |
1996 | * The length field from io_parms must be at least 1 and indicates a number of | |
1997 | * elements with data to write that begins with position 1 in iov array. All | |
1998 | * data length is specified by count. | |
1999 | */ | |
2000 | int | |
2001 | SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms, | |
2002 | unsigned int *nbytes, struct kvec *iov, int n_vec) | |
2003 | { | |
2004 | int rc = 0; | |
2005 | struct smb2_write_req *req = NULL; | |
2006 | struct smb2_write_rsp *rsp = NULL; | |
2007 | int resp_buftype; | |
2008 | *nbytes = 0; | |
2009 | ||
2010 | if (n_vec < 1) | |
2011 | return rc; | |
2012 | ||
2013 | rc = small_smb2_init(SMB2_WRITE, io_parms->tcon, (void **) &req); | |
2014 | if (rc) | |
2015 | return rc; | |
2016 | ||
2017 | if (io_parms->tcon->ses->server == NULL) | |
2018 | return -ECONNABORTED; | |
2019 | ||
2020 | req->hdr.ProcessId = cpu_to_le32(io_parms->pid); | |
2021 | ||
2022 | req->PersistentFileId = io_parms->persistent_fid; | |
2023 | req->VolatileFileId = io_parms->volatile_fid; | |
2024 | req->WriteChannelInfoOffset = 0; | |
2025 | req->WriteChannelInfoLength = 0; | |
2026 | req->Channel = 0; | |
2027 | req->Length = cpu_to_le32(io_parms->length); | |
2028 | req->Offset = cpu_to_le64(io_parms->offset); | |
2029 | /* 4 for rfc1002 length field */ | |
2030 | req->DataOffset = cpu_to_le16( | |
2031 | offsetof(struct smb2_write_req, Buffer) - 4); | |
2032 | req->RemainingBytes = 0; | |
2033 | ||
2034 | iov[0].iov_base = (char *)req; | |
2035 | /* 4 for rfc1002 length field and 1 for Buffer */ | |
2036 | iov[0].iov_len = get_rfc1002_length(req) + 4 - 1; | |
2037 | ||
2038 | /* length of entire message including data to be written */ | |
2039 | inc_rfc1001_len(req, io_parms->length - 1 /* Buffer */); | |
2040 | ||
2041 | rc = SendReceive2(xid, io_parms->tcon->ses, iov, n_vec + 1, | |
2042 | &resp_buftype, 0); | |
e5d04887 | 2043 | rsp = (struct smb2_write_rsp *)iov[0].iov_base; |
009d3443 PS |
2044 | |
2045 | if (rc) { | |
2046 | cifs_stats_fail_inc(io_parms->tcon, SMB2_WRITE_HE); | |
f96637be | 2047 | cifs_dbg(VFS, "Send error in write = %d\n", rc); |
e5d04887 | 2048 | } else |
009d3443 | 2049 | *nbytes = le32_to_cpu(rsp->DataLength); |
e5d04887 PS |
2050 | |
2051 | free_rsp_buf(resp_buftype, rsp); | |
009d3443 PS |
2052 | return rc; |
2053 | } | |
35143eb5 | 2054 | |
d324f08d PS |
2055 | static unsigned int |
2056 | num_entries(char *bufstart, char *end_of_buf, char **lastentry, size_t size) | |
2057 | { | |
2058 | int len; | |
2059 | unsigned int entrycount = 0; | |
2060 | unsigned int next_offset = 0; | |
2061 | FILE_DIRECTORY_INFO *entryptr; | |
2062 | ||
2063 | if (bufstart == NULL) | |
2064 | return 0; | |
2065 | ||
2066 | entryptr = (FILE_DIRECTORY_INFO *)bufstart; | |
2067 | ||
2068 | while (1) { | |
2069 | entryptr = (FILE_DIRECTORY_INFO *) | |
2070 | ((char *)entryptr + next_offset); | |
2071 | ||
2072 | if ((char *)entryptr + size > end_of_buf) { | |
f96637be | 2073 | cifs_dbg(VFS, "malformed search entry would overflow\n"); |
d324f08d PS |
2074 | break; |
2075 | } | |
2076 | ||
2077 | len = le32_to_cpu(entryptr->FileNameLength); | |
2078 | if ((char *)entryptr + len + size > end_of_buf) { | |
f96637be JP |
2079 | cifs_dbg(VFS, "directory entry name would overflow frame end of buf %p\n", |
2080 | end_of_buf); | |
d324f08d PS |
2081 | break; |
2082 | } | |
2083 | ||
2084 | *lastentry = (char *)entryptr; | |
2085 | entrycount++; | |
2086 | ||
2087 | next_offset = le32_to_cpu(entryptr->NextEntryOffset); | |
2088 | if (!next_offset) | |
2089 | break; | |
2090 | } | |
2091 | ||
2092 | return entrycount; | |
2093 | } | |
2094 | ||
2095 | /* | |
2096 | * Readdir/FindFirst | |
2097 | */ | |
2098 | int | |
2099 | SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon, | |
2100 | u64 persistent_fid, u64 volatile_fid, int index, | |
2101 | struct cifs_search_info *srch_inf) | |
2102 | { | |
2103 | struct smb2_query_directory_req *req; | |
2104 | struct smb2_query_directory_rsp *rsp = NULL; | |
2105 | struct kvec iov[2]; | |
2106 | int rc = 0; | |
2107 | int len; | |
2108 | int resp_buftype; | |
2109 | unsigned char *bufptr; | |
2110 | struct TCP_Server_Info *server; | |
2111 | struct cifs_ses *ses = tcon->ses; | |
2112 | __le16 asteriks = cpu_to_le16('*'); | |
2113 | char *end_of_smb; | |
2114 | unsigned int output_size = CIFSMaxBufSize; | |
2115 | size_t info_buf_size; | |
2116 | ||
2117 | if (ses && (ses->server)) | |
2118 | server = ses->server; | |
2119 | else | |
2120 | return -EIO; | |
2121 | ||
2122 | rc = small_smb2_init(SMB2_QUERY_DIRECTORY, tcon, (void **) &req); | |
2123 | if (rc) | |
2124 | return rc; | |
2125 | ||
2126 | switch (srch_inf->info_level) { | |
2127 | case SMB_FIND_FILE_DIRECTORY_INFO: | |
2128 | req->FileInformationClass = FILE_DIRECTORY_INFORMATION; | |
2129 | info_buf_size = sizeof(FILE_DIRECTORY_INFO) - 1; | |
2130 | break; | |
2131 | case SMB_FIND_FILE_ID_FULL_DIR_INFO: | |
2132 | req->FileInformationClass = FILEID_FULL_DIRECTORY_INFORMATION; | |
2133 | info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO) - 1; | |
2134 | break; | |
2135 | default: | |
f96637be JP |
2136 | cifs_dbg(VFS, "info level %u isn't supported\n", |
2137 | srch_inf->info_level); | |
d324f08d PS |
2138 | rc = -EINVAL; |
2139 | goto qdir_exit; | |
2140 | } | |
2141 | ||
2142 | req->FileIndex = cpu_to_le32(index); | |
2143 | req->PersistentFileId = persistent_fid; | |
2144 | req->VolatileFileId = volatile_fid; | |
2145 | ||
2146 | len = 0x2; | |
2147 | bufptr = req->Buffer; | |
2148 | memcpy(bufptr, &asteriks, len); | |
2149 | ||
2150 | req->FileNameOffset = | |
2151 | cpu_to_le16(sizeof(struct smb2_query_directory_req) - 1 - 4); | |
2152 | req->FileNameLength = cpu_to_le16(len); | |
2153 | /* | |
2154 | * BB could be 30 bytes or so longer if we used SMB2 specific | |
2155 | * buffer lengths, but this is safe and close enough. | |
2156 | */ | |
2157 | output_size = min_t(unsigned int, output_size, server->maxBuf); | |
2158 | output_size = min_t(unsigned int, output_size, 2 << 15); | |
2159 | req->OutputBufferLength = cpu_to_le32(output_size); | |
2160 | ||
2161 | iov[0].iov_base = (char *)req; | |
2162 | /* 4 for RFC1001 length and 1 for Buffer */ | |
2163 | iov[0].iov_len = get_rfc1002_length(req) + 4 - 1; | |
2164 | ||
2165 | iov[1].iov_base = (char *)(req->Buffer); | |
2166 | iov[1].iov_len = len; | |
2167 | ||
2168 | inc_rfc1001_len(req, len - 1 /* Buffer */); | |
2169 | ||
2170 | rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, 0); | |
e5d04887 PS |
2171 | rsp = (struct smb2_query_directory_rsp *)iov[0].iov_base; |
2172 | ||
d324f08d PS |
2173 | if (rc) { |
2174 | cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE); | |
2175 | goto qdir_exit; | |
2176 | } | |
d324f08d PS |
2177 | |
2178 | rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset), | |
2179 | le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr, | |
2180 | info_buf_size); | |
2181 | if (rc) | |
2182 | goto qdir_exit; | |
2183 | ||
2184 | srch_inf->unicode = true; | |
2185 | ||
2186 | if (srch_inf->ntwrk_buf_start) { | |
2187 | if (srch_inf->smallBuf) | |
2188 | cifs_small_buf_release(srch_inf->ntwrk_buf_start); | |
2189 | else | |
2190 | cifs_buf_release(srch_inf->ntwrk_buf_start); | |
2191 | } | |
2192 | srch_inf->ntwrk_buf_start = (char *)rsp; | |
2193 | srch_inf->srch_entries_start = srch_inf->last_entry = 4 /* rfclen */ + | |
2194 | (char *)&rsp->hdr + le16_to_cpu(rsp->OutputBufferOffset); | |
2195 | /* 4 for rfc1002 length field */ | |
2196 | end_of_smb = get_rfc1002_length(rsp) + 4 + (char *)&rsp->hdr; | |
2197 | srch_inf->entries_in_buffer = | |
2198 | num_entries(srch_inf->srch_entries_start, end_of_smb, | |
2199 | &srch_inf->last_entry, info_buf_size); | |
2200 | srch_inf->index_of_last_entry += srch_inf->entries_in_buffer; | |
f96637be JP |
2201 | cifs_dbg(FYI, "num entries %d last_index %lld srch start %p srch end %p\n", |
2202 | srch_inf->entries_in_buffer, srch_inf->index_of_last_entry, | |
2203 | srch_inf->srch_entries_start, srch_inf->last_entry); | |
d324f08d PS |
2204 | if (resp_buftype == CIFS_LARGE_BUFFER) |
2205 | srch_inf->smallBuf = false; | |
2206 | else if (resp_buftype == CIFS_SMALL_BUFFER) | |
2207 | srch_inf->smallBuf = true; | |
2208 | else | |
f96637be | 2209 | cifs_dbg(VFS, "illegal search buffer type\n"); |
d324f08d PS |
2210 | |
2211 | if (rsp->hdr.Status == STATUS_NO_MORE_FILES) | |
2212 | srch_inf->endOfSearch = 1; | |
2213 | else | |
2214 | srch_inf->endOfSearch = 0; | |
2215 | ||
2216 | return rc; | |
2217 | ||
2218 | qdir_exit: | |
2219 | free_rsp_buf(resp_buftype, rsp); | |
2220 | return rc; | |
2221 | } | |
2222 | ||
35143eb5 PS |
2223 | static int |
2224 | send_set_info(const unsigned int xid, struct cifs_tcon *tcon, | |
c839ff24 | 2225 | u64 persistent_fid, u64 volatile_fid, u32 pid, int info_class, |
35143eb5 PS |
2226 | unsigned int num, void **data, unsigned int *size) |
2227 | { | |
2228 | struct smb2_set_info_req *req; | |
2229 | struct smb2_set_info_rsp *rsp = NULL; | |
2230 | struct kvec *iov; | |
2231 | int rc = 0; | |
2232 | int resp_buftype; | |
2233 | unsigned int i; | |
2234 | struct TCP_Server_Info *server; | |
2235 | struct cifs_ses *ses = tcon->ses; | |
2236 | ||
2237 | if (ses && (ses->server)) | |
2238 | server = ses->server; | |
2239 | else | |
2240 | return -EIO; | |
2241 | ||
2242 | if (!num) | |
2243 | return -EINVAL; | |
2244 | ||
2245 | iov = kmalloc(sizeof(struct kvec) * num, GFP_KERNEL); | |
2246 | if (!iov) | |
2247 | return -ENOMEM; | |
2248 | ||
2249 | rc = small_smb2_init(SMB2_SET_INFO, tcon, (void **) &req); | |
2250 | if (rc) { | |
2251 | kfree(iov); | |
2252 | return rc; | |
2253 | } | |
2254 | ||
c839ff24 PS |
2255 | req->hdr.ProcessId = cpu_to_le32(pid); |
2256 | ||
35143eb5 PS |
2257 | req->InfoType = SMB2_O_INFO_FILE; |
2258 | req->FileInfoClass = info_class; | |
2259 | req->PersistentFileId = persistent_fid; | |
2260 | req->VolatileFileId = volatile_fid; | |
2261 | ||
2262 | /* 4 for RFC1001 length and 1 for Buffer */ | |
2263 | req->BufferOffset = | |
2264 | cpu_to_le16(sizeof(struct smb2_set_info_req) - 1 - 4); | |
2265 | req->BufferLength = cpu_to_le32(*size); | |
2266 | ||
2267 | inc_rfc1001_len(req, *size - 1 /* Buffer */); | |
2268 | ||
2269 | memcpy(req->Buffer, *data, *size); | |
2270 | ||
2271 | iov[0].iov_base = (char *)req; | |
2272 | /* 4 for RFC1001 length */ | |
2273 | iov[0].iov_len = get_rfc1002_length(req) + 4; | |
2274 | ||
2275 | for (i = 1; i < num; i++) { | |
2276 | inc_rfc1001_len(req, size[i]); | |
2277 | le32_add_cpu(&req->BufferLength, size[i]); | |
2278 | iov[i].iov_base = (char *)data[i]; | |
2279 | iov[i].iov_len = size[i]; | |
2280 | } | |
2281 | ||
2282 | rc = SendReceive2(xid, ses, iov, num, &resp_buftype, 0); | |
2283 | rsp = (struct smb2_set_info_rsp *)iov[0].iov_base; | |
2284 | ||
7d3fb24b | 2285 | if (rc != 0) |
35143eb5 | 2286 | cifs_stats_fail_inc(tcon, SMB2_SET_INFO_HE); |
7d3fb24b | 2287 | |
35143eb5 PS |
2288 | free_rsp_buf(resp_buftype, rsp); |
2289 | kfree(iov); | |
2290 | return rc; | |
2291 | } | |
2292 | ||
2293 | int | |
2294 | SMB2_rename(const unsigned int xid, struct cifs_tcon *tcon, | |
2295 | u64 persistent_fid, u64 volatile_fid, __le16 *target_file) | |
2296 | { | |
2297 | struct smb2_file_rename_info info; | |
2298 | void **data; | |
2299 | unsigned int size[2]; | |
2300 | int rc; | |
2301 | int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX)); | |
2302 | ||
2303 | data = kmalloc(sizeof(void *) * 2, GFP_KERNEL); | |
2304 | if (!data) | |
2305 | return -ENOMEM; | |
2306 | ||
2307 | info.ReplaceIfExists = 1; /* 1 = replace existing target with new */ | |
2308 | /* 0 = fail if target already exists */ | |
2309 | info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */ | |
2310 | info.FileNameLength = cpu_to_le32(len); | |
2311 | ||
2312 | data[0] = &info; | |
2313 | size[0] = sizeof(struct smb2_file_rename_info); | |
2314 | ||
2315 | data[1] = target_file; | |
2316 | size[1] = len + 2 /* null */; | |
2317 | ||
2318 | rc = send_set_info(xid, tcon, persistent_fid, volatile_fid, | |
c839ff24 PS |
2319 | current->tgid, FILE_RENAME_INFORMATION, 2, data, |
2320 | size); | |
35143eb5 PS |
2321 | kfree(data); |
2322 | return rc; | |
2323 | } | |
568798cc PS |
2324 | |
2325 | int | |
2326 | SMB2_set_hardlink(const unsigned int xid, struct cifs_tcon *tcon, | |
2327 | u64 persistent_fid, u64 volatile_fid, __le16 *target_file) | |
2328 | { | |
2329 | struct smb2_file_link_info info; | |
2330 | void **data; | |
2331 | unsigned int size[2]; | |
2332 | int rc; | |
2333 | int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX)); | |
2334 | ||
2335 | data = kmalloc(sizeof(void *) * 2, GFP_KERNEL); | |
2336 | if (!data) | |
2337 | return -ENOMEM; | |
2338 | ||
2339 | info.ReplaceIfExists = 0; /* 1 = replace existing link with new */ | |
2340 | /* 0 = fail if link already exists */ | |
2341 | info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */ | |
2342 | info.FileNameLength = cpu_to_le32(len); | |
2343 | ||
2344 | data[0] = &info; | |
2345 | size[0] = sizeof(struct smb2_file_link_info); | |
2346 | ||
2347 | data[1] = target_file; | |
2348 | size[1] = len + 2 /* null */; | |
2349 | ||
2350 | rc = send_set_info(xid, tcon, persistent_fid, volatile_fid, | |
c839ff24 | 2351 | current->tgid, FILE_LINK_INFORMATION, 2, data, size); |
568798cc PS |
2352 | kfree(data); |
2353 | return rc; | |
2354 | } | |
c839ff24 PS |
2355 | |
2356 | int | |
2357 | SMB2_set_eof(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, | |
2358 | u64 volatile_fid, u32 pid, __le64 *eof) | |
2359 | { | |
2360 | struct smb2_file_eof_info info; | |
2361 | void *data; | |
2362 | unsigned int size; | |
2363 | ||
2364 | info.EndOfFile = *eof; | |
2365 | ||
2366 | data = &info; | |
2367 | size = sizeof(struct smb2_file_eof_info); | |
2368 | ||
2369 | return send_set_info(xid, tcon, persistent_fid, volatile_fid, pid, | |
2370 | FILE_END_OF_FILE_INFORMATION, 1, &data, &size); | |
2371 | } | |
1feeaac7 PS |
2372 | |
2373 | int | |
2374 | SMB2_set_info(const unsigned int xid, struct cifs_tcon *tcon, | |
2375 | u64 persistent_fid, u64 volatile_fid, FILE_BASIC_INFO *buf) | |
2376 | { | |
2377 | unsigned int size; | |
2378 | size = sizeof(FILE_BASIC_INFO); | |
2379 | return send_set_info(xid, tcon, persistent_fid, volatile_fid, | |
2380 | current->tgid, FILE_BASIC_INFORMATION, 1, | |
2381 | (void **)&buf, &size); | |
2382 | } | |
983c88a4 PS |
2383 | |
2384 | int | |
2385 | SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon, | |
2386 | const u64 persistent_fid, const u64 volatile_fid, | |
2387 | __u8 oplock_level) | |
2388 | { | |
2389 | int rc; | |
2390 | struct smb2_oplock_break *req = NULL; | |
2391 | ||
f96637be | 2392 | cifs_dbg(FYI, "SMB2_oplock_break\n"); |
983c88a4 PS |
2393 | rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req); |
2394 | ||
2395 | if (rc) | |
2396 | return rc; | |
2397 | ||
2398 | req->VolatileFid = volatile_fid; | |
2399 | req->PersistentFid = persistent_fid; | |
2400 | req->OplockLevel = oplock_level; | |
2401 | req->hdr.CreditRequest = cpu_to_le16(1); | |
2402 | ||
2403 | rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, CIFS_OBREAK_OP); | |
2404 | /* SMB2 buffer freed by function above */ | |
2405 | ||
2406 | if (rc) { | |
2407 | cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE); | |
f96637be | 2408 | cifs_dbg(FYI, "Send error in Oplock Break = %d\n", rc); |
983c88a4 PS |
2409 | } |
2410 | ||
2411 | return rc; | |
2412 | } | |
6fc05c25 PS |
2413 | |
2414 | static void | |
2415 | copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info *pfs_inf, | |
2416 | struct kstatfs *kst) | |
2417 | { | |
2418 | kst->f_bsize = le32_to_cpu(pfs_inf->BytesPerSector) * | |
2419 | le32_to_cpu(pfs_inf->SectorsPerAllocationUnit); | |
2420 | kst->f_blocks = le64_to_cpu(pfs_inf->TotalAllocationUnits); | |
2421 | kst->f_bfree = le64_to_cpu(pfs_inf->ActualAvailableAllocationUnits); | |
2422 | kst->f_bavail = le64_to_cpu(pfs_inf->CallerAvailableAllocationUnits); | |
2423 | return; | |
2424 | } | |
2425 | ||
2426 | static int | |
2427 | build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon, int level, | |
2428 | int outbuf_len, u64 persistent_fid, u64 volatile_fid) | |
2429 | { | |
2430 | int rc; | |
2431 | struct smb2_query_info_req *req; | |
2432 | ||
f96637be | 2433 | cifs_dbg(FYI, "Query FSInfo level %d\n", level); |
6fc05c25 PS |
2434 | |
2435 | if ((tcon->ses == NULL) || (tcon->ses->server == NULL)) | |
2436 | return -EIO; | |
2437 | ||
2438 | rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req); | |
2439 | if (rc) | |
2440 | return rc; | |
2441 | ||
2442 | req->InfoType = SMB2_O_INFO_FILESYSTEM; | |
2443 | req->FileInfoClass = level; | |
2444 | req->PersistentFileId = persistent_fid; | |
2445 | req->VolatileFileId = volatile_fid; | |
2446 | /* 4 for rfc1002 length field and 1 for pad */ | |
2447 | req->InputBufferOffset = | |
2448 | cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4); | |
2449 | req->OutputBufferLength = cpu_to_le32( | |
2450 | outbuf_len + sizeof(struct smb2_query_info_rsp) - 1 - 4); | |
2451 | ||
2452 | iov->iov_base = (char *)req; | |
2453 | /* 4 for rfc1002 length field */ | |
2454 | iov->iov_len = get_rfc1002_length(req) + 4; | |
2455 | return 0; | |
2456 | } | |
2457 | ||
2458 | int | |
2459 | SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon, | |
2460 | u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata) | |
2461 | { | |
2462 | struct smb2_query_info_rsp *rsp = NULL; | |
2463 | struct kvec iov; | |
2464 | int rc = 0; | |
2465 | int resp_buftype; | |
2466 | struct cifs_ses *ses = tcon->ses; | |
2467 | struct smb2_fs_full_size_info *info = NULL; | |
2468 | ||
2469 | rc = build_qfs_info_req(&iov, tcon, FS_FULL_SIZE_INFORMATION, | |
2470 | sizeof(struct smb2_fs_full_size_info), | |
2471 | persistent_fid, volatile_fid); | |
2472 | if (rc) | |
2473 | return rc; | |
2474 | ||
2475 | rc = SendReceive2(xid, ses, &iov, 1, &resp_buftype, 0); | |
2476 | if (rc) { | |
2477 | cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE); | |
34f62640 | 2478 | goto qfsinf_exit; |
6fc05c25 PS |
2479 | } |
2480 | rsp = (struct smb2_query_info_rsp *)iov.iov_base; | |
2481 | ||
2482 | info = (struct smb2_fs_full_size_info *)(4 /* RFC1001 len */ + | |
2483 | le16_to_cpu(rsp->OutputBufferOffset) + (char *)&rsp->hdr); | |
2484 | rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset), | |
2485 | le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr, | |
2486 | sizeof(struct smb2_fs_full_size_info)); | |
2487 | if (!rc) | |
2488 | copy_fs_info_to_kstatfs(info, fsdata); | |
2489 | ||
34f62640 SF |
2490 | qfsinf_exit: |
2491 | free_rsp_buf(resp_buftype, iov.iov_base); | |
2492 | return rc; | |
2493 | } | |
2494 | ||
2495 | int | |
2496 | SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon, | |
2167114c | 2497 | u64 persistent_fid, u64 volatile_fid, int level) |
34f62640 SF |
2498 | { |
2499 | struct smb2_query_info_rsp *rsp = NULL; | |
2500 | struct kvec iov; | |
2501 | int rc = 0; | |
2167114c | 2502 | int resp_buftype, max_len, min_len; |
34f62640 SF |
2503 | struct cifs_ses *ses = tcon->ses; |
2504 | unsigned int rsp_len, offset; | |
2505 | ||
2167114c SF |
2506 | if (level == FS_DEVICE_INFORMATION) { |
2507 | max_len = sizeof(FILE_SYSTEM_DEVICE_INFO); | |
2508 | min_len = sizeof(FILE_SYSTEM_DEVICE_INFO); | |
2509 | } else if (level == FS_ATTRIBUTE_INFORMATION) { | |
2510 | max_len = sizeof(FILE_SYSTEM_ATTRIBUTE_INFO); | |
2511 | min_len = MIN_FS_ATTR_INFO_SIZE; | |
af6a12ea SF |
2512 | } else if (level == FS_SECTOR_SIZE_INFORMATION) { |
2513 | max_len = sizeof(struct smb3_fs_ss_info); | |
2514 | min_len = sizeof(struct smb3_fs_ss_info); | |
2167114c | 2515 | } else { |
af6a12ea | 2516 | cifs_dbg(FYI, "Invalid qfsinfo level %d\n", level); |
2167114c SF |
2517 | return -EINVAL; |
2518 | } | |
2519 | ||
2520 | rc = build_qfs_info_req(&iov, tcon, level, max_len, | |
34f62640 SF |
2521 | persistent_fid, volatile_fid); |
2522 | if (rc) | |
2523 | return rc; | |
2524 | ||
2525 | rc = SendReceive2(xid, ses, &iov, 1, &resp_buftype, 0); | |
2526 | if (rc) { | |
2527 | cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE); | |
2528 | goto qfsattr_exit; | |
2529 | } | |
2530 | rsp = (struct smb2_query_info_rsp *)iov.iov_base; | |
2531 | ||
2532 | rsp_len = le32_to_cpu(rsp->OutputBufferLength); | |
2533 | offset = le16_to_cpu(rsp->OutputBufferOffset); | |
2167114c SF |
2534 | rc = validate_buf(offset, rsp_len, &rsp->hdr, min_len); |
2535 | if (rc) | |
2536 | goto qfsattr_exit; | |
2537 | ||
2538 | if (level == FS_ATTRIBUTE_INFORMATION) | |
34f62640 SF |
2539 | memcpy(&tcon->fsAttrInfo, 4 /* RFC1001 len */ + offset |
2540 | + (char *)&rsp->hdr, min_t(unsigned int, | |
2167114c SF |
2541 | rsp_len, max_len)); |
2542 | else if (level == FS_DEVICE_INFORMATION) | |
2543 | memcpy(&tcon->fsDevInfo, 4 /* RFC1001 len */ + offset | |
2544 | + (char *)&rsp->hdr, sizeof(FILE_SYSTEM_DEVICE_INFO)); | |
af6a12ea SF |
2545 | else if (level == FS_SECTOR_SIZE_INFORMATION) { |
2546 | struct smb3_fs_ss_info *ss_info = (struct smb3_fs_ss_info *) | |
2547 | (4 /* RFC1001 len */ + offset + (char *)&rsp->hdr); | |
2548 | tcon->ss_flags = le32_to_cpu(ss_info->Flags); | |
2549 | tcon->perf_sector_size = | |
2550 | le32_to_cpu(ss_info->PhysicalBytesPerSectorForPerf); | |
2551 | } | |
34f62640 SF |
2552 | |
2553 | qfsattr_exit: | |
6fc05c25 PS |
2554 | free_rsp_buf(resp_buftype, iov.iov_base); |
2555 | return rc; | |
2556 | } | |
f7ba7fe6 PS |
2557 | |
2558 | int | |
2559 | smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon, | |
2560 | const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid, | |
2561 | const __u32 num_lock, struct smb2_lock_element *buf) | |
2562 | { | |
2563 | int rc = 0; | |
2564 | struct smb2_lock_req *req = NULL; | |
2565 | struct kvec iov[2]; | |
2566 | int resp_buf_type; | |
2567 | unsigned int count; | |
2568 | ||
f96637be | 2569 | cifs_dbg(FYI, "smb2_lockv num lock %d\n", num_lock); |
f7ba7fe6 PS |
2570 | |
2571 | rc = small_smb2_init(SMB2_LOCK, tcon, (void **) &req); | |
2572 | if (rc) | |
2573 | return rc; | |
2574 | ||
2575 | req->hdr.ProcessId = cpu_to_le32(pid); | |
2576 | req->LockCount = cpu_to_le16(num_lock); | |
2577 | ||
2578 | req->PersistentFileId = persist_fid; | |
2579 | req->VolatileFileId = volatile_fid; | |
2580 | ||
2581 | count = num_lock * sizeof(struct smb2_lock_element); | |
2582 | inc_rfc1001_len(req, count - sizeof(struct smb2_lock_element)); | |
2583 | ||
2584 | iov[0].iov_base = (char *)req; | |
2585 | /* 4 for rfc1002 length field and count for all locks */ | |
2586 | iov[0].iov_len = get_rfc1002_length(req) + 4 - count; | |
2587 | iov[1].iov_base = (char *)buf; | |
2588 | iov[1].iov_len = count; | |
2589 | ||
2590 | cifs_stats_inc(&tcon->stats.cifs_stats.num_locks); | |
2591 | rc = SendReceive2(xid, tcon->ses, iov, 2, &resp_buf_type, CIFS_NO_RESP); | |
2592 | if (rc) { | |
f96637be | 2593 | cifs_dbg(FYI, "Send error in smb2_lockv = %d\n", rc); |
f7ba7fe6 PS |
2594 | cifs_stats_fail_inc(tcon, SMB2_LOCK_HE); |
2595 | } | |
2596 | ||
2597 | return rc; | |
2598 | } | |
2599 | ||
2600 | int | |
2601 | SMB2_lock(const unsigned int xid, struct cifs_tcon *tcon, | |
2602 | const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid, | |
2603 | const __u64 length, const __u64 offset, const __u32 lock_flags, | |
2604 | const bool wait) | |
2605 | { | |
2606 | struct smb2_lock_element lock; | |
2607 | ||
2608 | lock.Offset = cpu_to_le64(offset); | |
2609 | lock.Length = cpu_to_le64(length); | |
2610 | lock.Flags = cpu_to_le32(lock_flags); | |
2611 | if (!wait && lock_flags != SMB2_LOCKFLAG_UNLOCK) | |
2612 | lock.Flags |= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY); | |
2613 | ||
2614 | return smb2_lockv(xid, tcon, persist_fid, volatile_fid, pid, 1, &lock); | |
2615 | } | |
0822f514 PS |
2616 | |
2617 | int | |
2618 | SMB2_lease_break(const unsigned int xid, struct cifs_tcon *tcon, | |
2619 | __u8 *lease_key, const __le32 lease_state) | |
2620 | { | |
2621 | int rc; | |
2622 | struct smb2_lease_ack *req = NULL; | |
2623 | ||
f96637be | 2624 | cifs_dbg(FYI, "SMB2_lease_break\n"); |
0822f514 PS |
2625 | rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req); |
2626 | ||
2627 | if (rc) | |
2628 | return rc; | |
2629 | ||
2630 | req->hdr.CreditRequest = cpu_to_le16(1); | |
2631 | req->StructureSize = cpu_to_le16(36); | |
2632 | inc_rfc1001_len(req, 12); | |
2633 | ||
2634 | memcpy(req->LeaseKey, lease_key, 16); | |
2635 | req->LeaseState = lease_state; | |
2636 | ||
2637 | rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, CIFS_OBREAK_OP); | |
2638 | /* SMB2 buffer freed by function above */ | |
2639 | ||
2640 | if (rc) { | |
2641 | cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE); | |
f96637be | 2642 | cifs_dbg(FYI, "Send error in Lease Break = %d\n", rc); |
0822f514 PS |
2643 | } |
2644 | ||
2645 | return rc; | |
2646 | } |