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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" |
ceb1b0b9 | 49 | #include "cifs_spnego.h" |
ec2e4523 PS |
50 | |
51 | /* | |
52 | * The following table defines the expected "StructureSize" of SMB2 requests | |
53 | * in order by SMB2 command. This is similar to "wct" in SMB/CIFS requests. | |
54 | * | |
55 | * Note that commands are defined in smb2pdu.h in le16 but the array below is | |
56 | * indexed by command in host byte order. | |
57 | */ | |
58 | static const int smb2_req_struct_sizes[NUMBER_OF_SMB2_COMMANDS] = { | |
59 | /* SMB2_NEGOTIATE */ 36, | |
60 | /* SMB2_SESSION_SETUP */ 25, | |
61 | /* SMB2_LOGOFF */ 4, | |
62 | /* SMB2_TREE_CONNECT */ 9, | |
63 | /* SMB2_TREE_DISCONNECT */ 4, | |
64 | /* SMB2_CREATE */ 57, | |
65 | /* SMB2_CLOSE */ 24, | |
66 | /* SMB2_FLUSH */ 24, | |
67 | /* SMB2_READ */ 49, | |
68 | /* SMB2_WRITE */ 49, | |
69 | /* SMB2_LOCK */ 48, | |
70 | /* SMB2_IOCTL */ 57, | |
71 | /* SMB2_CANCEL */ 4, | |
72 | /* SMB2_ECHO */ 4, | |
73 | /* SMB2_QUERY_DIRECTORY */ 33, | |
74 | /* SMB2_CHANGE_NOTIFY */ 32, | |
75 | /* SMB2_QUERY_INFO */ 41, | |
76 | /* SMB2_SET_INFO */ 33, | |
77 | /* SMB2_OPLOCK_BREAK */ 24 /* BB this is 36 for LEASE_BREAK variant */ | |
78 | }; | |
79 | ||
80 | ||
81 | static void | |
82 | smb2_hdr_assemble(struct smb2_hdr *hdr, __le16 smb2_cmd /* command */ , | |
83 | const struct cifs_tcon *tcon) | |
84 | { | |
85 | struct smb2_pdu *pdu = (struct smb2_pdu *)hdr; | |
86 | char *temp = (char *)hdr; | |
87 | /* lookup word count ie StructureSize from table */ | |
88 | __u16 parmsize = smb2_req_struct_sizes[le16_to_cpu(smb2_cmd)]; | |
89 | ||
90 | /* | |
91 | * smaller than SMALL_BUFFER_SIZE but bigger than fixed area of | |
92 | * largest operations (Create) | |
93 | */ | |
94 | memset(temp, 0, 256); | |
95 | ||
96 | /* Note this is only network field converted to big endian */ | |
97 | hdr->smb2_buf_length = cpu_to_be32(parmsize + sizeof(struct smb2_hdr) | |
98 | - 4 /* RFC 1001 length field itself not counted */); | |
99 | ||
373512ec | 100 | hdr->ProtocolId = SMB2_PROTO_NUMBER; |
ec2e4523 PS |
101 | hdr->StructureSize = cpu_to_le16(64); |
102 | hdr->Command = smb2_cmd; | |
103 | hdr->CreditRequest = cpu_to_le16(2); /* BB make this dynamic */ | |
104 | hdr->ProcessId = cpu_to_le32((__u16)current->tgid); | |
105 | ||
106 | if (!tcon) | |
107 | goto out; | |
108 | ||
2b80d049 SF |
109 | /* GLOBAL_CAP_LARGE_MTU will only be set if dialect > SMB2.02 */ |
110 | /* See sections 2.2.4 and 3.2.4.1.5 of MS-SMB2 */ | |
1dc92c45 | 111 | if ((tcon->ses) && (tcon->ses->server) && |
84ceeb96 | 112 | (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) |
2b80d049 SF |
113 | hdr->CreditCharge = cpu_to_le16(1); |
114 | /* else CreditCharge MBZ */ | |
115 | ||
ec2e4523 PS |
116 | hdr->TreeId = tcon->tid; |
117 | /* Uid is not converted */ | |
118 | if (tcon->ses) | |
119 | hdr->SessionId = tcon->ses->Suid; | |
f87ab88b SF |
120 | |
121 | /* | |
122 | * If we would set SMB2_FLAGS_DFS_OPERATIONS on open we also would have | |
123 | * to pass the path on the Open SMB prefixed by \\server\share. | |
124 | * Not sure when we would need to do the augmented path (if ever) and | |
125 | * setting this flag breaks the SMB2 open operation since it is | |
126 | * illegal to send an empty path name (without \\server\share prefix) | |
127 | * when the DFS flag is set in the SMB open header. We could | |
128 | * consider setting the flag on all operations other than open | |
129 | * but it is safer to net set it for now. | |
130 | */ | |
131 | /* if (tcon->share_flags & SHI1005_FLAGS_DFS) | |
132 | hdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS; */ | |
133 | ||
38d77c50 | 134 | if (tcon->ses && tcon->ses->server && tcon->ses->server->sign) |
3c1bf7e4 | 135 | hdr->Flags |= SMB2_FLAGS_SIGNED; |
ec2e4523 PS |
136 | out: |
137 | pdu->StructureSize2 = cpu_to_le16(parmsize); | |
138 | return; | |
139 | } | |
140 | ||
141 | static int | |
142 | smb2_reconnect(__le16 smb2_command, struct cifs_tcon *tcon) | |
143 | { | |
144 | int rc = 0; | |
aa24d1e9 PS |
145 | struct nls_table *nls_codepage; |
146 | struct cifs_ses *ses; | |
147 | struct TCP_Server_Info *server; | |
148 | ||
149 | /* | |
150 | * SMB2s NegProt, SessSetup, Logoff do not have tcon yet so | |
151 | * check for tcp and smb session status done differently | |
152 | * for those three - in the calling routine. | |
153 | */ | |
154 | if (tcon == NULL) | |
155 | return rc; | |
156 | ||
157 | if (smb2_command == SMB2_TREE_CONNECT) | |
158 | return rc; | |
159 | ||
160 | if (tcon->tidStatus == CifsExiting) { | |
161 | /* | |
162 | * only tree disconnect, open, and write, | |
163 | * (and ulogoff which does not have tcon) | |
164 | * are allowed as we start force umount. | |
165 | */ | |
166 | if ((smb2_command != SMB2_WRITE) && | |
167 | (smb2_command != SMB2_CREATE) && | |
168 | (smb2_command != SMB2_TREE_DISCONNECT)) { | |
f96637be JP |
169 | cifs_dbg(FYI, "can not send cmd %d while umounting\n", |
170 | smb2_command); | |
aa24d1e9 PS |
171 | return -ENODEV; |
172 | } | |
173 | } | |
174 | if ((!tcon->ses) || (tcon->ses->status == CifsExiting) || | |
175 | (!tcon->ses->server)) | |
176 | return -EIO; | |
177 | ||
178 | ses = tcon->ses; | |
179 | server = ses->server; | |
180 | ||
181 | /* | |
182 | * Give demultiplex thread up to 10 seconds to reconnect, should be | |
183 | * greater than cifs socket timeout which is 7 seconds | |
184 | */ | |
185 | while (server->tcpStatus == CifsNeedReconnect) { | |
186 | /* | |
187 | * Return to caller for TREE_DISCONNECT and LOGOFF and CLOSE | |
188 | * here since they are implicitly done when session drops. | |
189 | */ | |
190 | switch (smb2_command) { | |
191 | /* | |
192 | * BB Should we keep oplock break and add flush to exceptions? | |
193 | */ | |
194 | case SMB2_TREE_DISCONNECT: | |
195 | case SMB2_CANCEL: | |
196 | case SMB2_CLOSE: | |
197 | case SMB2_OPLOCK_BREAK: | |
198 | return -EAGAIN; | |
199 | } | |
200 | ||
201 | wait_event_interruptible_timeout(server->response_q, | |
202 | (server->tcpStatus != CifsNeedReconnect), 10 * HZ); | |
203 | ||
204 | /* are we still trying to reconnect? */ | |
205 | if (server->tcpStatus != CifsNeedReconnect) | |
206 | break; | |
207 | ||
208 | /* | |
209 | * on "soft" mounts we wait once. Hard mounts keep | |
210 | * retrying until process is killed or server comes | |
211 | * back on-line | |
212 | */ | |
213 | if (!tcon->retry) { | |
f96637be | 214 | cifs_dbg(FYI, "gave up waiting on reconnect in smb_init\n"); |
aa24d1e9 PS |
215 | return -EHOSTDOWN; |
216 | } | |
217 | } | |
218 | ||
219 | if (!tcon->ses->need_reconnect && !tcon->need_reconnect) | |
220 | return rc; | |
221 | ||
222 | nls_codepage = load_nls_default(); | |
223 | ||
224 | /* | |
225 | * need to prevent multiple threads trying to simultaneously reconnect | |
226 | * the same SMB session | |
227 | */ | |
228 | mutex_lock(&tcon->ses->session_mutex); | |
229 | rc = cifs_negotiate_protocol(0, tcon->ses); | |
230 | if (!rc && tcon->ses->need_reconnect) | |
231 | rc = cifs_setup_session(0, tcon->ses, nls_codepage); | |
232 | ||
233 | if (rc || !tcon->need_reconnect) { | |
234 | mutex_unlock(&tcon->ses->session_mutex); | |
235 | goto out; | |
236 | } | |
237 | ||
238 | cifs_mark_open_files_invalid(tcon); | |
239 | rc = SMB2_tcon(0, tcon->ses, tcon->treeName, tcon, nls_codepage); | |
240 | mutex_unlock(&tcon->ses->session_mutex); | |
f96637be | 241 | cifs_dbg(FYI, "reconnect tcon rc = %d\n", rc); |
aa24d1e9 PS |
242 | if (rc) |
243 | goto out; | |
244 | atomic_inc(&tconInfoReconnectCount); | |
aa24d1e9 PS |
245 | out: |
246 | /* | |
247 | * Check if handle based operation so we know whether we can continue | |
248 | * or not without returning to caller to reset file handle. | |
249 | */ | |
250 | /* | |
251 | * BB Is flush done by server on drop of tcp session? Should we special | |
252 | * case it and skip above? | |
253 | */ | |
254 | switch (smb2_command) { | |
255 | case SMB2_FLUSH: | |
256 | case SMB2_READ: | |
257 | case SMB2_WRITE: | |
258 | case SMB2_LOCK: | |
259 | case SMB2_IOCTL: | |
260 | case SMB2_QUERY_DIRECTORY: | |
261 | case SMB2_CHANGE_NOTIFY: | |
262 | case SMB2_QUERY_INFO: | |
263 | case SMB2_SET_INFO: | |
264 | return -EAGAIN; | |
265 | } | |
266 | unload_nls(nls_codepage); | |
ec2e4523 PS |
267 | return rc; |
268 | } | |
269 | ||
270 | /* | |
271 | * Allocate and return pointer to an SMB request hdr, and set basic | |
272 | * SMB information in the SMB header. If the return code is zero, this | |
273 | * function must have filled in request_buf pointer. | |
274 | */ | |
275 | static int | |
276 | small_smb2_init(__le16 smb2_command, struct cifs_tcon *tcon, | |
277 | void **request_buf) | |
278 | { | |
279 | int rc = 0; | |
280 | ||
281 | rc = smb2_reconnect(smb2_command, tcon); | |
282 | if (rc) | |
283 | return rc; | |
284 | ||
285 | /* BB eventually switch this to SMB2 specific small buf size */ | |
286 | *request_buf = cifs_small_buf_get(); | |
287 | if (*request_buf == NULL) { | |
288 | /* BB should we add a retry in here if not a writepage? */ | |
289 | return -ENOMEM; | |
290 | } | |
291 | ||
292 | smb2_hdr_assemble((struct smb2_hdr *) *request_buf, smb2_command, tcon); | |
293 | ||
294 | if (tcon != NULL) { | |
295 | #ifdef CONFIG_CIFS_STATS2 | |
ec2e4523 PS |
296 | uint16_t com_code = le16_to_cpu(smb2_command); |
297 | cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_sent[com_code]); | |
ec2e4523 PS |
298 | #endif |
299 | cifs_stats_inc(&tcon->num_smbs_sent); | |
300 | } | |
301 | ||
302 | return rc; | |
303 | } | |
304 | ||
ebb3a9d4 SF |
305 | #ifdef CONFIG_CIFS_SMB311 |
306 | /* offset is sizeof smb2_negotiate_req - 4 but rounded up to 8 bytes */ | |
307 | #define OFFSET_OF_NEG_CONTEXT 0x68 /* sizeof(struct smb2_negotiate_req) - 4 */ | |
308 | ||
309 | ||
310 | #define SMB2_PREAUTH_INTEGRITY_CAPABILITIES cpu_to_le16(1) | |
311 | #define SMB2_ENCRYPTION_CAPABILITIES cpu_to_le16(2) | |
312 | ||
313 | static void | |
314 | build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt) | |
315 | { | |
316 | pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES; | |
317 | pneg_ctxt->DataLength = cpu_to_le16(38); | |
318 | pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1); | |
319 | pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE); | |
320 | get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE); | |
321 | pneg_ctxt->HashAlgorithms = SMB2_PREAUTH_INTEGRITY_SHA512; | |
322 | } | |
323 | ||
324 | static void | |
325 | build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt) | |
326 | { | |
327 | pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES; | |
328 | pneg_ctxt->DataLength = cpu_to_le16(6); | |
329 | pneg_ctxt->CipherCount = cpu_to_le16(2); | |
330 | pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES128_GCM; | |
331 | pneg_ctxt->Ciphers[1] = SMB2_ENCRYPTION_AES128_CCM; | |
332 | } | |
333 | ||
334 | static void | |
335 | assemble_neg_contexts(struct smb2_negotiate_req *req) | |
336 | { | |
337 | ||
338 | /* +4 is to account for the RFC1001 len field */ | |
339 | char *pneg_ctxt = (char *)req + OFFSET_OF_NEG_CONTEXT + 4; | |
340 | ||
341 | build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt); | |
342 | /* Add 2 to size to round to 8 byte boundary */ | |
343 | pneg_ctxt += 2 + sizeof(struct smb2_preauth_neg_context); | |
344 | build_encrypt_ctxt((struct smb2_encryption_neg_context *)pneg_ctxt); | |
345 | req->NegotiateContextOffset = cpu_to_le32(OFFSET_OF_NEG_CONTEXT); | |
346 | req->NegotiateContextCount = cpu_to_le16(2); | |
347 | inc_rfc1001_len(req, 4 + sizeof(struct smb2_preauth_neg_context) + 2 | |
348 | + sizeof(struct smb2_encryption_neg_context)); /* calculate hash */ | |
349 | } | |
350 | #else | |
351 | static void assemble_neg_contexts(struct smb2_negotiate_req *req) | |
352 | { | |
353 | return; | |
354 | } | |
355 | #endif /* SMB311 */ | |
356 | ||
357 | ||
ec2e4523 PS |
358 | /* |
359 | * | |
360 | * SMB2 Worker functions follow: | |
361 | * | |
362 | * The general structure of the worker functions is: | |
363 | * 1) Call smb2_init (assembles SMB2 header) | |
364 | * 2) Initialize SMB2 command specific fields in fixed length area of SMB | |
365 | * 3) Call smb_sendrcv2 (sends request on socket and waits for response) | |
366 | * 4) Decode SMB2 command specific fields in the fixed length area | |
367 | * 5) Decode variable length data area (if any for this SMB2 command type) | |
368 | * 6) Call free smb buffer | |
369 | * 7) return | |
370 | * | |
371 | */ | |
372 | ||
373 | int | |
374 | SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses) | |
375 | { | |
376 | struct smb2_negotiate_req *req; | |
377 | struct smb2_negotiate_rsp *rsp; | |
378 | struct kvec iov[1]; | |
379 | int rc = 0; | |
380 | int resp_buftype; | |
3534b850 | 381 | struct TCP_Server_Info *server = ses->server; |
ec2e4523 PS |
382 | int blob_offset, blob_length; |
383 | char *security_blob; | |
384 | int flags = CIFS_NEG_OP; | |
385 | ||
f96637be | 386 | cifs_dbg(FYI, "Negotiate protocol\n"); |
ec2e4523 | 387 | |
3534b850 JL |
388 | if (!server) { |
389 | WARN(1, "%s: server is NULL!\n", __func__); | |
390 | return -EIO; | |
ec2e4523 PS |
391 | } |
392 | ||
393 | rc = small_smb2_init(SMB2_NEGOTIATE, NULL, (void **) &req); | |
394 | if (rc) | |
395 | return rc; | |
396 | ||
ec2e4523 PS |
397 | req->hdr.SessionId = 0; |
398 | ||
e4aa25e7 | 399 | req->Dialects[0] = cpu_to_le16(ses->server->vals->protocol_id); |
ec2e4523 | 400 | |
e4aa25e7 SF |
401 | req->DialectCount = cpu_to_le16(1); /* One vers= at a time for now */ |
402 | inc_rfc1001_len(req, 2); | |
ec2e4523 PS |
403 | |
404 | /* only one of SMB2 signing flags may be set in SMB2 request */ | |
38d77c50 | 405 | if (ses->sign) |
9cd2e62c | 406 | req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED); |
38d77c50 | 407 | else if (global_secflags & CIFSSEC_MAY_SIGN) |
9cd2e62c | 408 | req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED); |
38d77c50 JL |
409 | else |
410 | req->SecurityMode = 0; | |
ec2e4523 | 411 | |
e4aa25e7 | 412 | req->Capabilities = cpu_to_le32(ses->server->vals->req_capabilities); |
ec2e4523 | 413 | |
3c5f9be1 SF |
414 | /* ClientGUID must be zero for SMB2.02 dialect */ |
415 | if (ses->server->vals->protocol_id == SMB20_PROT_ID) | |
416 | memset(req->ClientGUID, 0, SMB2_CLIENT_GUID_SIZE); | |
ebb3a9d4 | 417 | else { |
3c5f9be1 SF |
418 | memcpy(req->ClientGUID, server->client_guid, |
419 | SMB2_CLIENT_GUID_SIZE); | |
ebb3a9d4 SF |
420 | if (ses->server->vals->protocol_id == SMB311_PROT_ID) |
421 | assemble_neg_contexts(req); | |
422 | } | |
ec2e4523 PS |
423 | iov[0].iov_base = (char *)req; |
424 | /* 4 for rfc1002 length field */ | |
425 | iov[0].iov_len = get_rfc1002_length(req) + 4; | |
426 | ||
427 | rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, flags); | |
428 | ||
429 | rsp = (struct smb2_negotiate_rsp *)iov[0].iov_base; | |
430 | /* | |
431 | * No tcon so can't do | |
432 | * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]); | |
433 | */ | |
434 | if (rc != 0) | |
435 | goto neg_exit; | |
436 | ||
f96637be | 437 | cifs_dbg(FYI, "mode 0x%x\n", rsp->SecurityMode); |
ec2e4523 | 438 | |
e4aa25e7 SF |
439 | /* BB we may eventually want to match the negotiated vs. requested |
440 | dialect, even though we are only requesting one at a time */ | |
441 | if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) | |
f96637be | 442 | cifs_dbg(FYI, "negotiated smb2.0 dialect\n"); |
e4aa25e7 | 443 | else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) |
f96637be | 444 | cifs_dbg(FYI, "negotiated smb2.1 dialect\n"); |
e4aa25e7 | 445 | else if (rsp->DialectRevision == cpu_to_le16(SMB30_PROT_ID)) |
f96637be | 446 | cifs_dbg(FYI, "negotiated smb3.0 dialect\n"); |
20b6d8b4 SF |
447 | else if (rsp->DialectRevision == cpu_to_le16(SMB302_PROT_ID)) |
448 | cifs_dbg(FYI, "negotiated smb3.02 dialect\n"); | |
5f7fbf73 SF |
449 | #ifdef CONFIG_CIFS_SMB311 |
450 | else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID)) | |
451 | cifs_dbg(FYI, "negotiated smb3.1.1 dialect\n"); | |
452 | #endif /* SMB311 */ | |
ec2e4523 | 453 | else { |
f799d623 | 454 | cifs_dbg(VFS, "Illegal dialect returned by server 0x%x\n", |
f96637be | 455 | le16_to_cpu(rsp->DialectRevision)); |
ec2e4523 PS |
456 | rc = -EIO; |
457 | goto neg_exit; | |
458 | } | |
459 | server->dialect = le16_to_cpu(rsp->DialectRevision); | |
460 | ||
e598d1d8 JL |
461 | /* SMB2 only has an extended negflavor */ |
462 | server->negflavor = CIFS_NEGFLAVOR_EXTENDED; | |
2365c4ea PS |
463 | /* set it to the maximum buffer size value we can send with 1 credit */ |
464 | server->maxBuf = min_t(unsigned int, le32_to_cpu(rsp->MaxTransactSize), | |
465 | SMB2_MAX_BUFFER_SIZE); | |
ec2e4523 PS |
466 | server->max_read = le32_to_cpu(rsp->MaxReadSize); |
467 | server->max_write = le32_to_cpu(rsp->MaxWriteSize); | |
468 | /* BB Do we need to validate the SecurityMode? */ | |
469 | server->sec_mode = le16_to_cpu(rsp->SecurityMode); | |
470 | server->capabilities = le32_to_cpu(rsp->Capabilities); | |
29e20f9c PS |
471 | /* Internal types */ |
472 | server->capabilities |= SMB2_NT_FIND | SMB2_LARGE_FILES; | |
ec2e4523 PS |
473 | |
474 | security_blob = smb2_get_data_area_len(&blob_offset, &blob_length, | |
475 | &rsp->hdr); | |
5d875cc9 SF |
476 | /* |
477 | * See MS-SMB2 section 2.2.4: if no blob, client picks default which | |
478 | * for us will be | |
479 | * ses->sectype = RawNTLMSSP; | |
480 | * but for time being this is our only auth choice so doesn't matter. | |
481 | * We just found a server which sets blob length to zero expecting raw. | |
482 | */ | |
483 | if (blob_length == 0) | |
484 | cifs_dbg(FYI, "missing security blob on negprot\n"); | |
3c1bf7e4 | 485 | |
38d77c50 | 486 | rc = cifs_enable_signing(server, ses->sign); |
9ddec561 JL |
487 | if (rc) |
488 | goto neg_exit; | |
ceb1b0b9 | 489 | if (blob_length) { |
ebdd207e | 490 | rc = decode_negTokenInit(security_blob, blob_length, server); |
ceb1b0b9 SF |
491 | if (rc == 1) |
492 | rc = 0; | |
493 | else if (rc == 0) | |
494 | rc = -EIO; | |
ec2e4523 | 495 | } |
ec2e4523 PS |
496 | neg_exit: |
497 | free_rsp_buf(resp_buftype, rsp); | |
498 | return rc; | |
499 | } | |
5478f9ba | 500 | |
ff1c038a SF |
501 | int smb3_validate_negotiate(const unsigned int xid, struct cifs_tcon *tcon) |
502 | { | |
503 | int rc = 0; | |
504 | struct validate_negotiate_info_req vneg_inbuf; | |
505 | struct validate_negotiate_info_rsp *pneg_rsp; | |
506 | u32 rsplen; | |
507 | ||
508 | cifs_dbg(FYI, "validate negotiate\n"); | |
509 | ||
510 | /* | |
511 | * validation ioctl must be signed, so no point sending this if we | |
512 | * can not sign it. We could eventually change this to selectively | |
513 | * sign just this, the first and only signed request on a connection. | |
514 | * This is good enough for now since a user who wants better security | |
515 | * would also enable signing on the mount. Having validation of | |
516 | * negotiate info for signed connections helps reduce attack vectors | |
517 | */ | |
518 | if (tcon->ses->server->sign == false) | |
519 | return 0; /* validation requires signing */ | |
520 | ||
521 | vneg_inbuf.Capabilities = | |
522 | cpu_to_le32(tcon->ses->server->vals->req_capabilities); | |
39552ea8 SP |
523 | memcpy(vneg_inbuf.Guid, tcon->ses->server->client_guid, |
524 | SMB2_CLIENT_GUID_SIZE); | |
ff1c038a SF |
525 | |
526 | if (tcon->ses->sign) | |
527 | vneg_inbuf.SecurityMode = | |
528 | cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED); | |
529 | else if (global_secflags & CIFSSEC_MAY_SIGN) | |
530 | vneg_inbuf.SecurityMode = | |
531 | cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED); | |
532 | else | |
533 | vneg_inbuf.SecurityMode = 0; | |
534 | ||
535 | vneg_inbuf.DialectCount = cpu_to_le16(1); | |
536 | vneg_inbuf.Dialects[0] = | |
537 | cpu_to_le16(tcon->ses->server->vals->protocol_id); | |
538 | ||
539 | rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID, | |
540 | FSCTL_VALIDATE_NEGOTIATE_INFO, true /* is_fsctl */, | |
541 | (char *)&vneg_inbuf, sizeof(struct validate_negotiate_info_req), | |
542 | (char **)&pneg_rsp, &rsplen); | |
543 | ||
544 | if (rc != 0) { | |
545 | cifs_dbg(VFS, "validate protocol negotiate failed: %d\n", rc); | |
546 | return -EIO; | |
547 | } | |
548 | ||
549 | if (rsplen != sizeof(struct validate_negotiate_info_rsp)) { | |
550 | cifs_dbg(VFS, "invalid size of protocol negotiate response\n"); | |
551 | return -EIO; | |
552 | } | |
553 | ||
554 | /* check validate negotiate info response matches what we got earlier */ | |
555 | if (pneg_rsp->Dialect != | |
556 | cpu_to_le16(tcon->ses->server->vals->protocol_id)) | |
557 | goto vneg_out; | |
558 | ||
559 | if (pneg_rsp->SecurityMode != cpu_to_le16(tcon->ses->server->sec_mode)) | |
560 | goto vneg_out; | |
561 | ||
562 | /* do not validate server guid because not saved at negprot time yet */ | |
563 | ||
564 | if ((le32_to_cpu(pneg_rsp->Capabilities) | SMB2_NT_FIND | | |
565 | SMB2_LARGE_FILES) != tcon->ses->server->capabilities) | |
566 | goto vneg_out; | |
567 | ||
568 | /* validate negotiate successful */ | |
569 | cifs_dbg(FYI, "validate negotiate info successful\n"); | |
570 | return 0; | |
571 | ||
572 | vneg_out: | |
573 | cifs_dbg(VFS, "protocol revalidation - security settings mismatch\n"); | |
574 | return -EIO; | |
575 | } | |
576 | ||
5478f9ba PS |
577 | int |
578 | SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses, | |
579 | const struct nls_table *nls_cp) | |
580 | { | |
581 | struct smb2_sess_setup_req *req; | |
582 | struct smb2_sess_setup_rsp *rsp = NULL; | |
583 | struct kvec iov[2]; | |
584 | int rc = 0; | |
7de975e3 | 585 | int resp_buftype = CIFS_NO_BUFFER; |
5478f9ba | 586 | __le32 phase = NtLmNegotiate; /* NTLMSSP, if needed, is multistage */ |
3534b850 | 587 | struct TCP_Server_Info *server = ses->server; |
5478f9ba | 588 | u16 blob_length = 0; |
ceb1b0b9 SF |
589 | struct key *spnego_key = NULL; |
590 | char *security_blob = NULL; | |
b8da344b | 591 | unsigned char *ntlmssp_blob = NULL; |
5478f9ba PS |
592 | bool use_spnego = false; /* else use raw ntlmssp */ |
593 | ||
f96637be | 594 | cifs_dbg(FYI, "Session Setup\n"); |
5478f9ba | 595 | |
3534b850 JL |
596 | if (!server) { |
597 | WARN(1, "%s: server is NULL!\n", __func__); | |
598 | return -EIO; | |
5478f9ba PS |
599 | } |
600 | ||
d4e63bd6 SP |
601 | /* |
602 | * If we are here due to reconnect, free per-smb session key | |
603 | * in case signing was required. | |
604 | */ | |
605 | kfree(ses->auth_key.response); | |
606 | ses->auth_key.response = NULL; | |
607 | ||
5478f9ba PS |
608 | /* |
609 | * If memory allocation is successful, caller of this function | |
610 | * frees it. | |
611 | */ | |
612 | ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL); | |
613 | if (!ses->ntlmssp) | |
614 | return -ENOMEM; | |
5c234aa5 | 615 | ses->ntlmssp->sesskey_per_smbsess = true; |
5478f9ba | 616 | |
3f618223 | 617 | /* FIXME: allow for other auth types besides NTLMSSP (e.g. krb5) */ |
ceb1b0b9 SF |
618 | if (ses->sectype != Kerberos && ses->sectype != RawNTLMSSP) |
619 | ses->sectype = RawNTLMSSP; | |
5478f9ba PS |
620 | |
621 | ssetup_ntlmssp_authenticate: | |
622 | if (phase == NtLmChallenge) | |
623 | phase = NtLmAuthenticate; /* if ntlmssp, now final phase */ | |
624 | ||
625 | rc = small_smb2_init(SMB2_SESSION_SETUP, NULL, (void **) &req); | |
626 | if (rc) | |
627 | return rc; | |
628 | ||
5478f9ba | 629 | req->hdr.SessionId = 0; /* First session, not a reauthenticate */ |
eed0e175 | 630 | req->Flags = 0; /* MBZ */ |
5478f9ba PS |
631 | /* to enable echos and oplocks */ |
632 | req->hdr.CreditRequest = cpu_to_le16(3); | |
633 | ||
634 | /* only one of SMB2 signing flags may be set in SMB2 request */ | |
38d77c50 JL |
635 | if (server->sign) |
636 | req->SecurityMode = SMB2_NEGOTIATE_SIGNING_REQUIRED; | |
637 | else if (global_secflags & CIFSSEC_MAY_SIGN) /* one flag unlike MUST_ */ | |
638 | req->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED; | |
639 | else | |
640 | req->SecurityMode = 0; | |
641 | ||
5478f9ba PS |
642 | req->Capabilities = 0; |
643 | req->Channel = 0; /* MBZ */ | |
644 | ||
645 | iov[0].iov_base = (char *)req; | |
646 | /* 4 for rfc1002 length field and 1 for pad */ | |
647 | iov[0].iov_len = get_rfc1002_length(req) + 4 - 1; | |
ceb1b0b9 SF |
648 | |
649 | if (ses->sectype == Kerberos) { | |
650 | #ifdef CONFIG_CIFS_UPCALL | |
651 | struct cifs_spnego_msg *msg; | |
652 | ||
653 | spnego_key = cifs_get_spnego_key(ses); | |
654 | if (IS_ERR(spnego_key)) { | |
655 | rc = PTR_ERR(spnego_key); | |
656 | spnego_key = NULL; | |
657 | goto ssetup_exit; | |
658 | } | |
659 | ||
146aa8b1 | 660 | msg = spnego_key->payload.data[0]; |
ceb1b0b9 SF |
661 | /* |
662 | * check version field to make sure that cifs.upcall is | |
663 | * sending us a response in an expected form | |
664 | */ | |
665 | if (msg->version != CIFS_SPNEGO_UPCALL_VERSION) { | |
666 | cifs_dbg(VFS, | |
667 | "bad cifs.upcall version. Expected %d got %d", | |
668 | CIFS_SPNEGO_UPCALL_VERSION, msg->version); | |
669 | rc = -EKEYREJECTED; | |
670 | goto ssetup_exit; | |
671 | } | |
672 | ses->auth_key.response = kmemdup(msg->data, msg->sesskey_len, | |
673 | GFP_KERNEL); | |
674 | if (!ses->auth_key.response) { | |
675 | cifs_dbg(VFS, | |
676 | "Kerberos can't allocate (%u bytes) memory", | |
677 | msg->sesskey_len); | |
678 | rc = -ENOMEM; | |
679 | goto ssetup_exit; | |
680 | } | |
681 | ses->auth_key.len = msg->sesskey_len; | |
682 | blob_length = msg->secblob_len; | |
683 | iov[1].iov_base = msg->data + msg->sesskey_len; | |
684 | iov[1].iov_len = blob_length; | |
685 | #else | |
686 | rc = -EOPNOTSUPP; | |
687 | goto ssetup_exit; | |
688 | #endif /* CONFIG_CIFS_UPCALL */ | |
689 | } else if (phase == NtLmNegotiate) { /* if not krb5 must be ntlmssp */ | |
5478f9ba PS |
690 | ntlmssp_blob = kmalloc(sizeof(struct _NEGOTIATE_MESSAGE), |
691 | GFP_KERNEL); | |
692 | if (ntlmssp_blob == NULL) { | |
693 | rc = -ENOMEM; | |
694 | goto ssetup_exit; | |
695 | } | |
696 | build_ntlmssp_negotiate_blob(ntlmssp_blob, ses); | |
697 | if (use_spnego) { | |
698 | /* blob_length = build_spnego_ntlmssp_blob( | |
699 | &security_blob, | |
700 | sizeof(struct _NEGOTIATE_MESSAGE), | |
701 | ntlmssp_blob); */ | |
702 | /* BB eventually need to add this */ | |
f96637be | 703 | cifs_dbg(VFS, "spnego not supported for SMB2 yet\n"); |
5478f9ba PS |
704 | rc = -EOPNOTSUPP; |
705 | kfree(ntlmssp_blob); | |
706 | goto ssetup_exit; | |
707 | } else { | |
708 | blob_length = sizeof(struct _NEGOTIATE_MESSAGE); | |
709 | /* with raw NTLMSSP we don't encapsulate in SPNEGO */ | |
710 | security_blob = ntlmssp_blob; | |
711 | } | |
ceb1b0b9 SF |
712 | iov[1].iov_base = security_blob; |
713 | iov[1].iov_len = blob_length; | |
5478f9ba PS |
714 | } else if (phase == NtLmAuthenticate) { |
715 | req->hdr.SessionId = ses->Suid; | |
b8da344b | 716 | rc = build_ntlmssp_auth_blob(&ntlmssp_blob, &blob_length, ses, |
5478f9ba PS |
717 | nls_cp); |
718 | if (rc) { | |
f96637be JP |
719 | cifs_dbg(FYI, "build_ntlmssp_auth_blob failed %d\n", |
720 | rc); | |
5478f9ba PS |
721 | goto ssetup_exit; /* BB double check error handling */ |
722 | } | |
723 | if (use_spnego) { | |
724 | /* blob_length = build_spnego_ntlmssp_blob( | |
725 | &security_blob, | |
726 | blob_length, | |
727 | ntlmssp_blob); */ | |
f96637be | 728 | cifs_dbg(VFS, "spnego not supported for SMB2 yet\n"); |
5478f9ba PS |
729 | rc = -EOPNOTSUPP; |
730 | kfree(ntlmssp_blob); | |
731 | goto ssetup_exit; | |
732 | } else { | |
733 | security_blob = ntlmssp_blob; | |
734 | } | |
ceb1b0b9 SF |
735 | iov[1].iov_base = security_blob; |
736 | iov[1].iov_len = blob_length; | |
5478f9ba | 737 | } else { |
f96637be | 738 | cifs_dbg(VFS, "illegal ntlmssp phase\n"); |
5478f9ba PS |
739 | rc = -EIO; |
740 | goto ssetup_exit; | |
741 | } | |
742 | ||
743 | /* Testing shows that buffer offset must be at location of Buffer[0] */ | |
744 | req->SecurityBufferOffset = | |
745 | cpu_to_le16(sizeof(struct smb2_sess_setup_req) - | |
746 | 1 /* pad */ - 4 /* rfc1001 len */); | |
747 | req->SecurityBufferLength = cpu_to_le16(blob_length); | |
5478f9ba PS |
748 | |
749 | inc_rfc1001_len(req, blob_length - 1 /* pad */); | |
750 | ||
751 | /* BB add code to build os and lm fields */ | |
752 | ||
6d8b59d7 SF |
753 | rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, |
754 | CIFS_LOG_ERROR | CIFS_NEG_OP); | |
5478f9ba PS |
755 | |
756 | kfree(security_blob); | |
757 | rsp = (struct smb2_sess_setup_rsp *)iov[0].iov_base; | |
ceb1b0b9 | 758 | ses->Suid = rsp->hdr.SessionId; |
4ca3a99c PS |
759 | if (resp_buftype != CIFS_NO_BUFFER && |
760 | rsp->hdr.Status == STATUS_MORE_PROCESSING_REQUIRED) { | |
5478f9ba | 761 | if (phase != NtLmNegotiate) { |
f96637be | 762 | cifs_dbg(VFS, "Unexpected more processing error\n"); |
5478f9ba PS |
763 | goto ssetup_exit; |
764 | } | |
765 | if (offsetof(struct smb2_sess_setup_rsp, Buffer) - 4 != | |
4ca3a99c | 766 | le16_to_cpu(rsp->SecurityBufferOffset)) { |
f96637be JP |
767 | cifs_dbg(VFS, "Invalid security buffer offset %d\n", |
768 | le16_to_cpu(rsp->SecurityBufferOffset)); | |
5478f9ba PS |
769 | rc = -EIO; |
770 | goto ssetup_exit; | |
771 | } | |
772 | ||
773 | /* NTLMSSP Negotiate sent now processing challenge (response) */ | |
774 | phase = NtLmChallenge; /* process ntlmssp challenge */ | |
775 | rc = 0; /* MORE_PROCESSING is not an error here but expected */ | |
5478f9ba PS |
776 | rc = decode_ntlmssp_challenge(rsp->Buffer, |
777 | le16_to_cpu(rsp->SecurityBufferLength), ses); | |
778 | } | |
779 | ||
780 | /* | |
781 | * BB eventually add code for SPNEGO decoding of NtlmChallenge blob, | |
782 | * but at least the raw NTLMSSP case works. | |
783 | */ | |
784 | /* | |
785 | * No tcon so can't do | |
786 | * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]); | |
787 | */ | |
788 | if (rc != 0) | |
789 | goto ssetup_exit; | |
790 | ||
5478f9ba | 791 | ses->session_flags = le16_to_cpu(rsp->SessionFlags); |
0cbaa53c SF |
792 | if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) |
793 | cifs_dbg(VFS, "SMB3 encryption not supported yet\n"); | |
5478f9ba PS |
794 | ssetup_exit: |
795 | free_rsp_buf(resp_buftype, rsp); | |
796 | ||
797 | /* if ntlmssp, and negotiate succeeded, proceed to authenticate phase */ | |
798 | if ((phase == NtLmChallenge) && (rc == 0)) | |
799 | goto ssetup_ntlmssp_authenticate; | |
d4e63bd6 SP |
800 | |
801 | if (!rc) { | |
802 | mutex_lock(&server->srv_mutex); | |
32811d24 SP |
803 | if (server->sign && server->ops->generate_signingkey) { |
804 | rc = server->ops->generate_signingkey(ses); | |
805 | kfree(ses->auth_key.response); | |
806 | ses->auth_key.response = NULL; | |
807 | if (rc) { | |
808 | cifs_dbg(FYI, | |
809 | "SMB3 session key generation failed\n"); | |
810 | mutex_unlock(&server->srv_mutex); | |
811 | goto keygen_exit; | |
812 | } | |
813 | } | |
d4e63bd6 SP |
814 | if (!server->session_estab) { |
815 | server->sequence_number = 0x2; | |
816 | server->session_estab = true; | |
d4e63bd6 SP |
817 | } |
818 | mutex_unlock(&server->srv_mutex); | |
819 | ||
820 | cifs_dbg(FYI, "SMB2/3 session established successfully\n"); | |
821 | spin_lock(&GlobalMid_Lock); | |
822 | ses->status = CifsGood; | |
823 | ses->need_reconnect = false; | |
824 | spin_unlock(&GlobalMid_Lock); | |
825 | } | |
826 | ||
32811d24 | 827 | keygen_exit: |
d4e63bd6 SP |
828 | if (!server->sign) { |
829 | kfree(ses->auth_key.response); | |
830 | ses->auth_key.response = NULL; | |
831 | } | |
ceb1b0b9 SF |
832 | if (spnego_key) { |
833 | key_invalidate(spnego_key); | |
834 | key_put(spnego_key); | |
835 | } | |
d4e63bd6 SP |
836 | kfree(ses->ntlmssp); |
837 | ||
5478f9ba PS |
838 | return rc; |
839 | } | |
840 | ||
841 | int | |
842 | SMB2_logoff(const unsigned int xid, struct cifs_ses *ses) | |
843 | { | |
844 | struct smb2_logoff_req *req; /* response is also trivial struct */ | |
845 | int rc = 0; | |
846 | struct TCP_Server_Info *server; | |
847 | ||
f96637be | 848 | cifs_dbg(FYI, "disconnect session %p\n", ses); |
5478f9ba PS |
849 | |
850 | if (ses && (ses->server)) | |
851 | server = ses->server; | |
852 | else | |
853 | return -EIO; | |
854 | ||
eb4c7df6 SP |
855 | /* no need to send SMB logoff if uid already closed due to reconnect */ |
856 | if (ses->need_reconnect) | |
857 | goto smb2_session_already_dead; | |
858 | ||
5478f9ba PS |
859 | rc = small_smb2_init(SMB2_LOGOFF, NULL, (void **) &req); |
860 | if (rc) | |
861 | return rc; | |
862 | ||
863 | /* since no tcon, smb2_init can not do this, so do here */ | |
864 | req->hdr.SessionId = ses->Suid; | |
38d77c50 | 865 | if (server->sign) |
3c1bf7e4 | 866 | req->hdr.Flags |= SMB2_FLAGS_SIGNED; |
5478f9ba PS |
867 | |
868 | rc = SendReceiveNoRsp(xid, ses, (char *) &req->hdr, 0); | |
869 | /* | |
870 | * No tcon so can't do | |
871 | * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]); | |
872 | */ | |
eb4c7df6 SP |
873 | |
874 | smb2_session_already_dead: | |
5478f9ba PS |
875 | return rc; |
876 | } | |
faaf946a PS |
877 | |
878 | static inline void cifs_stats_fail_inc(struct cifs_tcon *tcon, uint16_t code) | |
879 | { | |
d60622eb | 880 | cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_failed[code]); |
faaf946a PS |
881 | } |
882 | ||
883 | #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */) | |
884 | ||
de9f68df SF |
885 | /* These are similar values to what Windows uses */ |
886 | static inline void init_copy_chunk_defaults(struct cifs_tcon *tcon) | |
887 | { | |
888 | tcon->max_chunks = 256; | |
889 | tcon->max_bytes_chunk = 1048576; | |
890 | tcon->max_bytes_copy = 16777216; | |
891 | } | |
892 | ||
faaf946a PS |
893 | int |
894 | SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree, | |
895 | struct cifs_tcon *tcon, const struct nls_table *cp) | |
896 | { | |
897 | struct smb2_tree_connect_req *req; | |
898 | struct smb2_tree_connect_rsp *rsp = NULL; | |
899 | struct kvec iov[2]; | |
900 | int rc = 0; | |
901 | int resp_buftype; | |
902 | int unc_path_len; | |
903 | struct TCP_Server_Info *server; | |
904 | __le16 *unc_path = NULL; | |
905 | ||
f96637be | 906 | cifs_dbg(FYI, "TCON\n"); |
faaf946a PS |
907 | |
908 | if ((ses->server) && tree) | |
909 | server = ses->server; | |
910 | else | |
911 | return -EIO; | |
912 | ||
913 | if (tcon && tcon->bad_network_name) | |
914 | return -ENOENT; | |
915 | ||
ff9f84b7 | 916 | if ((tcon && tcon->seal) && |
88627148 SF |
917 | ((ses->server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION) == 0)) { |
918 | cifs_dbg(VFS, "encryption requested but no server support"); | |
919 | return -EOPNOTSUPP; | |
920 | } | |
921 | ||
faaf946a PS |
922 | unc_path = kmalloc(MAX_SHARENAME_LENGTH * 2, GFP_KERNEL); |
923 | if (unc_path == NULL) | |
924 | return -ENOMEM; | |
925 | ||
926 | unc_path_len = cifs_strtoUTF16(unc_path, tree, strlen(tree), cp) + 1; | |
927 | unc_path_len *= 2; | |
928 | if (unc_path_len < 2) { | |
929 | kfree(unc_path); | |
930 | return -EINVAL; | |
931 | } | |
932 | ||
933 | rc = small_smb2_init(SMB2_TREE_CONNECT, tcon, (void **) &req); | |
934 | if (rc) { | |
935 | kfree(unc_path); | |
936 | return rc; | |
937 | } | |
938 | ||
939 | if (tcon == NULL) { | |
940 | /* since no tcon, smb2_init can not do this, so do here */ | |
941 | req->hdr.SessionId = ses->Suid; | |
942 | /* if (ses->server->sec_mode & SECMODE_SIGN_REQUIRED) | |
943 | req->hdr.Flags |= SMB2_FLAGS_SIGNED; */ | |
944 | } | |
945 | ||
946 | iov[0].iov_base = (char *)req; | |
947 | /* 4 for rfc1002 length field and 1 for pad */ | |
948 | iov[0].iov_len = get_rfc1002_length(req) + 4 - 1; | |
949 | ||
950 | /* Testing shows that buffer offset must be at location of Buffer[0] */ | |
951 | req->PathOffset = cpu_to_le16(sizeof(struct smb2_tree_connect_req) | |
952 | - 1 /* pad */ - 4 /* do not count rfc1001 len field */); | |
953 | req->PathLength = cpu_to_le16(unc_path_len - 2); | |
954 | iov[1].iov_base = unc_path; | |
955 | iov[1].iov_len = unc_path_len; | |
956 | ||
957 | inc_rfc1001_len(req, unc_path_len - 1 /* pad */); | |
958 | ||
959 | rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, 0); | |
960 | rsp = (struct smb2_tree_connect_rsp *)iov[0].iov_base; | |
961 | ||
962 | if (rc != 0) { | |
963 | if (tcon) { | |
964 | cifs_stats_fail_inc(tcon, SMB2_TREE_CONNECT_HE); | |
965 | tcon->need_reconnect = true; | |
966 | } | |
967 | goto tcon_error_exit; | |
968 | } | |
969 | ||
faaf946a PS |
970 | if (tcon == NULL) { |
971 | ses->ipc_tid = rsp->hdr.TreeId; | |
972 | goto tcon_exit; | |
973 | } | |
974 | ||
975 | if (rsp->ShareType & SMB2_SHARE_TYPE_DISK) | |
f96637be | 976 | cifs_dbg(FYI, "connection to disk share\n"); |
faaf946a PS |
977 | else if (rsp->ShareType & SMB2_SHARE_TYPE_PIPE) { |
978 | tcon->ipc = true; | |
f96637be | 979 | cifs_dbg(FYI, "connection to pipe share\n"); |
faaf946a PS |
980 | } else if (rsp->ShareType & SMB2_SHARE_TYPE_PRINT) { |
981 | tcon->print = true; | |
f96637be | 982 | cifs_dbg(FYI, "connection to printer\n"); |
faaf946a | 983 | } else { |
f96637be | 984 | cifs_dbg(VFS, "unknown share type %d\n", rsp->ShareType); |
faaf946a PS |
985 | rc = -EOPNOTSUPP; |
986 | goto tcon_error_exit; | |
987 | } | |
988 | ||
989 | tcon->share_flags = le32_to_cpu(rsp->ShareFlags); | |
769ee6a4 | 990 | tcon->capabilities = rsp->Capabilities; /* we keep caps little endian */ |
faaf946a PS |
991 | tcon->maximal_access = le32_to_cpu(rsp->MaximalAccess); |
992 | tcon->tidStatus = CifsGood; | |
993 | tcon->need_reconnect = false; | |
994 | tcon->tid = rsp->hdr.TreeId; | |
46b51d08 | 995 | strlcpy(tcon->treeName, tree, sizeof(tcon->treeName)); |
faaf946a PS |
996 | |
997 | if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) && | |
998 | ((tcon->share_flags & SHI1005_FLAGS_DFS) == 0)) | |
f96637be | 999 | cifs_dbg(VFS, "DFS capability contradicts DFS flag\n"); |
de9f68df | 1000 | init_copy_chunk_defaults(tcon); |
88627148 SF |
1001 | if (tcon->share_flags & SHI1005_FLAGS_ENCRYPT_DATA) |
1002 | cifs_dbg(VFS, "Encrypted shares not supported"); | |
ff1c038a SF |
1003 | if (tcon->ses->server->ops->validate_negotiate) |
1004 | rc = tcon->ses->server->ops->validate_negotiate(xid, tcon); | |
faaf946a PS |
1005 | tcon_exit: |
1006 | free_rsp_buf(resp_buftype, rsp); | |
1007 | kfree(unc_path); | |
1008 | return rc; | |
1009 | ||
1010 | tcon_error_exit: | |
1011 | if (rsp->hdr.Status == STATUS_BAD_NETWORK_NAME) { | |
f96637be | 1012 | cifs_dbg(VFS, "BAD_NETWORK_NAME: %s\n", tree); |
18f39e7b SF |
1013 | if (tcon) |
1014 | tcon->bad_network_name = true; | |
faaf946a PS |
1015 | } |
1016 | goto tcon_exit; | |
1017 | } | |
1018 | ||
1019 | int | |
1020 | SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon) | |
1021 | { | |
1022 | struct smb2_tree_disconnect_req *req; /* response is trivial */ | |
1023 | int rc = 0; | |
1024 | struct TCP_Server_Info *server; | |
1025 | struct cifs_ses *ses = tcon->ses; | |
1026 | ||
f96637be | 1027 | cifs_dbg(FYI, "Tree Disconnect\n"); |
faaf946a PS |
1028 | |
1029 | if (ses && (ses->server)) | |
1030 | server = ses->server; | |
1031 | else | |
1032 | return -EIO; | |
1033 | ||
1034 | if ((tcon->need_reconnect) || (tcon->ses->need_reconnect)) | |
1035 | return 0; | |
1036 | ||
1037 | rc = small_smb2_init(SMB2_TREE_DISCONNECT, tcon, (void **) &req); | |
1038 | if (rc) | |
1039 | return rc; | |
1040 | ||
1041 | rc = SendReceiveNoRsp(xid, ses, (char *)&req->hdr, 0); | |
1042 | if (rc) | |
1043 | cifs_stats_fail_inc(tcon, SMB2_TREE_DISCONNECT_HE); | |
1044 | ||
1045 | return rc; | |
1046 | } | |
2503a0db | 1047 | |
b8c32dbb | 1048 | |
63eb3def PS |
1049 | static struct create_durable * |
1050 | create_durable_buf(void) | |
1051 | { | |
1052 | struct create_durable *buf; | |
1053 | ||
1054 | buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL); | |
1055 | if (!buf) | |
1056 | return NULL; | |
1057 | ||
1058 | buf->ccontext.DataOffset = cpu_to_le16(offsetof | |
9cbc0b73 | 1059 | (struct create_durable, Data)); |
63eb3def PS |
1060 | buf->ccontext.DataLength = cpu_to_le32(16); |
1061 | buf->ccontext.NameOffset = cpu_to_le16(offsetof | |
1062 | (struct create_durable, Name)); | |
1063 | buf->ccontext.NameLength = cpu_to_le16(4); | |
12197a7f | 1064 | /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DHnQ" */ |
63eb3def PS |
1065 | buf->Name[0] = 'D'; |
1066 | buf->Name[1] = 'H'; | |
1067 | buf->Name[2] = 'n'; | |
1068 | buf->Name[3] = 'Q'; | |
1069 | return buf; | |
1070 | } | |
1071 | ||
9cbc0b73 PS |
1072 | static struct create_durable * |
1073 | create_reconnect_durable_buf(struct cifs_fid *fid) | |
1074 | { | |
1075 | struct create_durable *buf; | |
1076 | ||
1077 | buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL); | |
1078 | if (!buf) | |
1079 | return NULL; | |
1080 | ||
1081 | buf->ccontext.DataOffset = cpu_to_le16(offsetof | |
1082 | (struct create_durable, Data)); | |
1083 | buf->ccontext.DataLength = cpu_to_le32(16); | |
1084 | buf->ccontext.NameOffset = cpu_to_le16(offsetof | |
1085 | (struct create_durable, Name)); | |
1086 | buf->ccontext.NameLength = cpu_to_le16(4); | |
1087 | buf->Data.Fid.PersistentFileId = fid->persistent_fid; | |
1088 | buf->Data.Fid.VolatileFileId = fid->volatile_fid; | |
12197a7f | 1089 | /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT is "DHnC" */ |
9cbc0b73 PS |
1090 | buf->Name[0] = 'D'; |
1091 | buf->Name[1] = 'H'; | |
1092 | buf->Name[2] = 'n'; | |
1093 | buf->Name[3] = 'C'; | |
1094 | return buf; | |
1095 | } | |
1096 | ||
b8c32dbb | 1097 | static __u8 |
42873b0a PS |
1098 | parse_lease_state(struct TCP_Server_Info *server, struct smb2_create_rsp *rsp, |
1099 | unsigned int *epoch) | |
b8c32dbb PS |
1100 | { |
1101 | char *data_offset; | |
b5c7cde3 | 1102 | struct create_context *cc; |
deb7deff JM |
1103 | unsigned int next; |
1104 | unsigned int remaining; | |
fd554396 | 1105 | char *name; |
b8c32dbb | 1106 | |
fd554396 | 1107 | data_offset = (char *)rsp + 4 + le32_to_cpu(rsp->CreateContextsOffset); |
deb7deff | 1108 | remaining = le32_to_cpu(rsp->CreateContextsLength); |
b5c7cde3 | 1109 | cc = (struct create_context *)data_offset; |
deb7deff | 1110 | while (remaining >= sizeof(struct create_context)) { |
b5c7cde3 | 1111 | name = le16_to_cpu(cc->NameOffset) + (char *)cc; |
deb7deff JM |
1112 | if (le16_to_cpu(cc->NameLength) == 4 && |
1113 | strncmp(name, "RqLs", 4) == 0) | |
1114 | return server->ops->parse_lease_buf(cc, epoch); | |
1115 | ||
1116 | next = le32_to_cpu(cc->Next); | |
1117 | if (!next) | |
1118 | break; | |
1119 | remaining -= next; | |
1120 | cc = (struct create_context *)((char *)cc + next); | |
1121 | } | |
b8c32dbb | 1122 | |
b5c7cde3 | 1123 | return 0; |
b8c32dbb PS |
1124 | } |
1125 | ||
d22cbfec | 1126 | static int |
a41a28bd PS |
1127 | add_lease_context(struct TCP_Server_Info *server, struct kvec *iov, |
1128 | unsigned int *num_iovec, __u8 *oplock) | |
d22cbfec PS |
1129 | { |
1130 | struct smb2_create_req *req = iov[0].iov_base; | |
1131 | unsigned int num = *num_iovec; | |
1132 | ||
a41a28bd | 1133 | iov[num].iov_base = server->ops->create_lease_buf(oplock+1, *oplock); |
d22cbfec PS |
1134 | if (iov[num].iov_base == NULL) |
1135 | return -ENOMEM; | |
a41a28bd | 1136 | iov[num].iov_len = server->vals->create_lease_size; |
d22cbfec PS |
1137 | req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_LEASE; |
1138 | if (!req->CreateContextsOffset) | |
1139 | req->CreateContextsOffset = cpu_to_le32( | |
1140 | sizeof(struct smb2_create_req) - 4 + | |
1141 | iov[num - 1].iov_len); | |
a41a28bd PS |
1142 | le32_add_cpu(&req->CreateContextsLength, |
1143 | server->vals->create_lease_size); | |
1144 | inc_rfc1001_len(&req->hdr, server->vals->create_lease_size); | |
d22cbfec PS |
1145 | *num_iovec = num + 1; |
1146 | return 0; | |
1147 | } | |
1148 | ||
b56eae4d SF |
1149 | static struct create_durable_v2 * |
1150 | create_durable_v2_buf(struct cifs_fid *pfid) | |
1151 | { | |
1152 | struct create_durable_v2 *buf; | |
1153 | ||
1154 | buf = kzalloc(sizeof(struct create_durable_v2), GFP_KERNEL); | |
1155 | if (!buf) | |
1156 | return NULL; | |
1157 | ||
1158 | buf->ccontext.DataOffset = cpu_to_le16(offsetof | |
1159 | (struct create_durable_v2, dcontext)); | |
1160 | buf->ccontext.DataLength = cpu_to_le32(sizeof(struct durable_context_v2)); | |
1161 | buf->ccontext.NameOffset = cpu_to_le16(offsetof | |
1162 | (struct create_durable_v2, Name)); | |
1163 | buf->ccontext.NameLength = cpu_to_le16(4); | |
1164 | ||
1165 | buf->dcontext.Timeout = 0; /* Should this be configurable by workload */ | |
1166 | buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT); | |
1167 | get_random_bytes(buf->dcontext.CreateGuid, 16); | |
1168 | memcpy(pfid->create_guid, buf->dcontext.CreateGuid, 16); | |
1169 | ||
1170 | /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DH2Q" */ | |
1171 | buf->Name[0] = 'D'; | |
1172 | buf->Name[1] = 'H'; | |
1173 | buf->Name[2] = '2'; | |
1174 | buf->Name[3] = 'Q'; | |
1175 | return buf; | |
1176 | } | |
1177 | ||
1178 | static struct create_durable_handle_reconnect_v2 * | |
1179 | create_reconnect_durable_v2_buf(struct cifs_fid *fid) | |
1180 | { | |
1181 | struct create_durable_handle_reconnect_v2 *buf; | |
1182 | ||
1183 | buf = kzalloc(sizeof(struct create_durable_handle_reconnect_v2), | |
1184 | GFP_KERNEL); | |
1185 | if (!buf) | |
1186 | return NULL; | |
1187 | ||
1188 | buf->ccontext.DataOffset = | |
1189 | cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2, | |
1190 | dcontext)); | |
1191 | buf->ccontext.DataLength = | |
1192 | cpu_to_le32(sizeof(struct durable_reconnect_context_v2)); | |
1193 | buf->ccontext.NameOffset = | |
1194 | cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2, | |
1195 | Name)); | |
1196 | buf->ccontext.NameLength = cpu_to_le16(4); | |
1197 | ||
1198 | buf->dcontext.Fid.PersistentFileId = fid->persistent_fid; | |
1199 | buf->dcontext.Fid.VolatileFileId = fid->volatile_fid; | |
1200 | buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT); | |
1201 | memcpy(buf->dcontext.CreateGuid, fid->create_guid, 16); | |
1202 | ||
1203 | /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2 is "DH2C" */ | |
1204 | buf->Name[0] = 'D'; | |
1205 | buf->Name[1] = 'H'; | |
1206 | buf->Name[2] = '2'; | |
1207 | buf->Name[3] = 'C'; | |
1208 | return buf; | |
1209 | } | |
1210 | ||
63eb3def | 1211 | static int |
b56eae4d SF |
1212 | add_durable_v2_context(struct kvec *iov, unsigned int *num_iovec, |
1213 | struct cifs_open_parms *oparms) | |
1214 | { | |
1215 | struct smb2_create_req *req = iov[0].iov_base; | |
1216 | unsigned int num = *num_iovec; | |
1217 | ||
1218 | iov[num].iov_base = create_durable_v2_buf(oparms->fid); | |
1219 | if (iov[num].iov_base == NULL) | |
1220 | return -ENOMEM; | |
1221 | iov[num].iov_len = sizeof(struct create_durable_v2); | |
1222 | if (!req->CreateContextsOffset) | |
1223 | req->CreateContextsOffset = | |
1224 | cpu_to_le32(sizeof(struct smb2_create_req) - 4 + | |
1225 | iov[1].iov_len); | |
1226 | le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable_v2)); | |
1227 | inc_rfc1001_len(&req->hdr, sizeof(struct create_durable_v2)); | |
1228 | *num_iovec = num + 1; | |
1229 | return 0; | |
1230 | } | |
1231 | ||
1232 | static int | |
1233 | add_durable_reconnect_v2_context(struct kvec *iov, unsigned int *num_iovec, | |
9cbc0b73 | 1234 | struct cifs_open_parms *oparms) |
63eb3def PS |
1235 | { |
1236 | struct smb2_create_req *req = iov[0].iov_base; | |
1237 | unsigned int num = *num_iovec; | |
1238 | ||
b56eae4d SF |
1239 | /* indicate that we don't need to relock the file */ |
1240 | oparms->reconnect = false; | |
1241 | ||
1242 | iov[num].iov_base = create_reconnect_durable_v2_buf(oparms->fid); | |
1243 | if (iov[num].iov_base == NULL) | |
1244 | return -ENOMEM; | |
1245 | iov[num].iov_len = sizeof(struct create_durable_handle_reconnect_v2); | |
1246 | if (!req->CreateContextsOffset) | |
1247 | req->CreateContextsOffset = | |
1248 | cpu_to_le32(sizeof(struct smb2_create_req) - 4 + | |
1249 | iov[1].iov_len); | |
1250 | le32_add_cpu(&req->CreateContextsLength, | |
1251 | sizeof(struct create_durable_handle_reconnect_v2)); | |
1252 | inc_rfc1001_len(&req->hdr, | |
1253 | sizeof(struct create_durable_handle_reconnect_v2)); | |
1254 | *num_iovec = num + 1; | |
1255 | return 0; | |
1256 | } | |
1257 | ||
1258 | static int | |
1259 | add_durable_context(struct kvec *iov, unsigned int *num_iovec, | |
1260 | struct cifs_open_parms *oparms, bool use_persistent) | |
1261 | { | |
1262 | struct smb2_create_req *req = iov[0].iov_base; | |
1263 | unsigned int num = *num_iovec; | |
1264 | ||
1265 | if (use_persistent) { | |
1266 | if (oparms->reconnect) | |
1267 | return add_durable_reconnect_v2_context(iov, num_iovec, | |
1268 | oparms); | |
1269 | else | |
1270 | return add_durable_v2_context(iov, num_iovec, oparms); | |
1271 | } | |
1272 | ||
9cbc0b73 PS |
1273 | if (oparms->reconnect) { |
1274 | iov[num].iov_base = create_reconnect_durable_buf(oparms->fid); | |
1275 | /* indicate that we don't need to relock the file */ | |
1276 | oparms->reconnect = false; | |
1277 | } else | |
1278 | iov[num].iov_base = create_durable_buf(); | |
63eb3def PS |
1279 | if (iov[num].iov_base == NULL) |
1280 | return -ENOMEM; | |
1281 | iov[num].iov_len = sizeof(struct create_durable); | |
1282 | if (!req->CreateContextsOffset) | |
1283 | req->CreateContextsOffset = | |
1284 | cpu_to_le32(sizeof(struct smb2_create_req) - 4 + | |
1285 | iov[1].iov_len); | |
31f92e9a | 1286 | le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable)); |
63eb3def PS |
1287 | inc_rfc1001_len(&req->hdr, sizeof(struct create_durable)); |
1288 | *num_iovec = num + 1; | |
1289 | return 0; | |
1290 | } | |
1291 | ||
2503a0db | 1292 | int |
064f6047 | 1293 | SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path, |
b42bf888 PS |
1294 | __u8 *oplock, struct smb2_file_all_info *buf, |
1295 | struct smb2_err_rsp **err_buf) | |
2503a0db PS |
1296 | { |
1297 | struct smb2_create_req *req; | |
1298 | struct smb2_create_rsp *rsp; | |
1299 | struct TCP_Server_Info *server; | |
064f6047 | 1300 | struct cifs_tcon *tcon = oparms->tcon; |
2503a0db | 1301 | struct cifs_ses *ses = tcon->ses; |
63eb3def | 1302 | struct kvec iov[4]; |
2503a0db PS |
1303 | int resp_buftype; |
1304 | int uni_path_len; | |
b8c32dbb PS |
1305 | __le16 *copy_path = NULL; |
1306 | int copy_size; | |
2503a0db | 1307 | int rc = 0; |
59aa3718 | 1308 | unsigned int num_iovecs = 2; |
ca81983f | 1309 | __u32 file_attributes = 0; |
663a9621 | 1310 | char *dhc_buf = NULL, *lc_buf = NULL; |
2503a0db | 1311 | |
f96637be | 1312 | cifs_dbg(FYI, "create/open\n"); |
2503a0db PS |
1313 | |
1314 | if (ses && (ses->server)) | |
1315 | server = ses->server; | |
1316 | else | |
1317 | return -EIO; | |
1318 | ||
1319 | rc = small_smb2_init(SMB2_CREATE, tcon, (void **) &req); | |
1320 | if (rc) | |
1321 | return rc; | |
1322 | ||
064f6047 | 1323 | if (oparms->create_options & CREATE_OPTION_READONLY) |
ca81983f | 1324 | file_attributes |= ATTR_READONLY; |
db8b631d SF |
1325 | if (oparms->create_options & CREATE_OPTION_SPECIAL) |
1326 | file_attributes |= ATTR_SYSTEM; | |
ca81983f | 1327 | |
2503a0db | 1328 | req->ImpersonationLevel = IL_IMPERSONATION; |
064f6047 | 1329 | req->DesiredAccess = cpu_to_le32(oparms->desired_access); |
2503a0db PS |
1330 | /* File attributes ignored on open (used in create though) */ |
1331 | req->FileAttributes = cpu_to_le32(file_attributes); | |
1332 | req->ShareAccess = FILE_SHARE_ALL_LE; | |
064f6047 PS |
1333 | req->CreateDisposition = cpu_to_le32(oparms->disposition); |
1334 | req->CreateOptions = cpu_to_le32(oparms->create_options & CREATE_OPTIONS_MASK); | |
2503a0db | 1335 | uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2; |
59aa3718 PS |
1336 | /* do not count rfc1001 len field */ |
1337 | req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req) - 4); | |
2503a0db PS |
1338 | |
1339 | iov[0].iov_base = (char *)req; | |
1340 | /* 4 for rfc1002 length field */ | |
1341 | iov[0].iov_len = get_rfc1002_length(req) + 4; | |
1342 | ||
1343 | /* MUST set path len (NameLength) to 0 opening root of share */ | |
59aa3718 PS |
1344 | req->NameLength = cpu_to_le16(uni_path_len - 2); |
1345 | /* -1 since last byte is buf[0] which is sent below (path) */ | |
1346 | iov[0].iov_len--; | |
1347 | if (uni_path_len % 8 != 0) { | |
1348 | copy_size = uni_path_len / 8 * 8; | |
1349 | if (copy_size < uni_path_len) | |
1350 | copy_size += 8; | |
1351 | ||
1352 | copy_path = kzalloc(copy_size, GFP_KERNEL); | |
1353 | if (!copy_path) | |
1354 | return -ENOMEM; | |
1355 | memcpy((char *)copy_path, (const char *)path, | |
1356 | uni_path_len); | |
1357 | uni_path_len = copy_size; | |
1358 | path = copy_path; | |
2503a0db PS |
1359 | } |
1360 | ||
59aa3718 PS |
1361 | iov[1].iov_len = uni_path_len; |
1362 | iov[1].iov_base = path; | |
1363 | /* -1 since last byte is buf[0] which was counted in smb2_buf_len */ | |
1364 | inc_rfc1001_len(req, uni_path_len - 1); | |
1365 | ||
b8c32dbb PS |
1366 | if (!server->oplocks) |
1367 | *oplock = SMB2_OPLOCK_LEVEL_NONE; | |
1368 | ||
a41a28bd | 1369 | if (!(server->capabilities & SMB2_GLOBAL_CAP_LEASING) || |
b8c32dbb PS |
1370 | *oplock == SMB2_OPLOCK_LEVEL_NONE) |
1371 | req->RequestedOplockLevel = *oplock; | |
1372 | else { | |
a41a28bd | 1373 | rc = add_lease_context(server, iov, &num_iovecs, oplock); |
d22cbfec | 1374 | if (rc) { |
b8c32dbb PS |
1375 | cifs_small_buf_release(req); |
1376 | kfree(copy_path); | |
d22cbfec | 1377 | return rc; |
b8c32dbb | 1378 | } |
663a9621 | 1379 | lc_buf = iov[num_iovecs-1].iov_base; |
b8c32dbb PS |
1380 | } |
1381 | ||
63eb3def PS |
1382 | if (*oplock == SMB2_OPLOCK_LEVEL_BATCH) { |
1383 | /* need to set Next field of lease context if we request it */ | |
a41a28bd | 1384 | if (server->capabilities & SMB2_GLOBAL_CAP_LEASING) { |
63eb3def PS |
1385 | struct create_context *ccontext = |
1386 | (struct create_context *)iov[num_iovecs-1].iov_base; | |
1c46943f | 1387 | ccontext->Next = |
a41a28bd | 1388 | cpu_to_le32(server->vals->create_lease_size); |
63eb3def | 1389 | } |
b56eae4d SF |
1390 | |
1391 | rc = add_durable_context(iov, &num_iovecs, oparms, | |
1392 | tcon->use_persistent); | |
63eb3def PS |
1393 | if (rc) { |
1394 | cifs_small_buf_release(req); | |
1395 | kfree(copy_path); | |
663a9621 | 1396 | kfree(lc_buf); |
63eb3def PS |
1397 | return rc; |
1398 | } | |
663a9621 | 1399 | dhc_buf = iov[num_iovecs-1].iov_base; |
63eb3def PS |
1400 | } |
1401 | ||
2503a0db PS |
1402 | rc = SendReceive2(xid, ses, iov, num_iovecs, &resp_buftype, 0); |
1403 | rsp = (struct smb2_create_rsp *)iov[0].iov_base; | |
1404 | ||
1405 | if (rc != 0) { | |
1406 | cifs_stats_fail_inc(tcon, SMB2_CREATE_HE); | |
b42bf888 PS |
1407 | if (err_buf) |
1408 | *err_buf = kmemdup(rsp, get_rfc1002_length(rsp) + 4, | |
1409 | GFP_KERNEL); | |
2503a0db PS |
1410 | goto creat_exit; |
1411 | } | |
1412 | ||
064f6047 PS |
1413 | oparms->fid->persistent_fid = rsp->PersistentFileId; |
1414 | oparms->fid->volatile_fid = rsp->VolatileFileId; | |
f0df737e PS |
1415 | |
1416 | if (buf) { | |
1417 | memcpy(buf, &rsp->CreationTime, 32); | |
1418 | buf->AllocationSize = rsp->AllocationSize; | |
1419 | buf->EndOfFile = rsp->EndofFile; | |
1420 | buf->Attributes = rsp->FileAttributes; | |
1421 | buf->NumberOfLinks = cpu_to_le32(1); | |
1422 | buf->DeletePending = 0; | |
1423 | } | |
2e44b288 | 1424 | |
b8c32dbb | 1425 | if (rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE) |
42873b0a | 1426 | *oplock = parse_lease_state(server, rsp, &oparms->fid->epoch); |
b8c32dbb PS |
1427 | else |
1428 | *oplock = rsp->OplockLevel; | |
2503a0db | 1429 | creat_exit: |
b8c32dbb | 1430 | kfree(copy_path); |
663a9621 PS |
1431 | kfree(lc_buf); |
1432 | kfree(dhc_buf); | |
2503a0db PS |
1433 | free_rsp_buf(resp_buftype, rsp); |
1434 | return rc; | |
1435 | } | |
1436 | ||
4a72dafa SF |
1437 | /* |
1438 | * SMB2 IOCTL is used for both IOCTLs and FSCTLs | |
1439 | */ | |
1440 | int | |
1441 | SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, | |
1442 | u64 volatile_fid, u32 opcode, bool is_fsctl, char *in_data, | |
1443 | u32 indatalen, char **out_data, u32 *plen /* returned data len */) | |
1444 | { | |
1445 | struct smb2_ioctl_req *req; | |
1446 | struct smb2_ioctl_rsp *rsp; | |
1447 | struct TCP_Server_Info *server; | |
8e353106 | 1448 | struct cifs_ses *ses; |
4a72dafa SF |
1449 | struct kvec iov[2]; |
1450 | int resp_buftype; | |
1451 | int num_iovecs; | |
1452 | int rc = 0; | |
1453 | ||
1454 | cifs_dbg(FYI, "SMB2 IOCTL\n"); | |
1455 | ||
3d1a3745 SF |
1456 | if (out_data != NULL) |
1457 | *out_data = NULL; | |
1458 | ||
4a72dafa SF |
1459 | /* zero out returned data len, in case of error */ |
1460 | if (plen) | |
1461 | *plen = 0; | |
1462 | ||
8e353106 SF |
1463 | if (tcon) |
1464 | ses = tcon->ses; | |
1465 | else | |
1466 | return -EIO; | |
1467 | ||
4a72dafa SF |
1468 | if (ses && (ses->server)) |
1469 | server = ses->server; | |
1470 | else | |
1471 | return -EIO; | |
1472 | ||
1473 | rc = small_smb2_init(SMB2_IOCTL, tcon, (void **) &req); | |
1474 | if (rc) | |
1475 | return rc; | |
1476 | ||
1477 | req->CtlCode = cpu_to_le32(opcode); | |
1478 | req->PersistentFileId = persistent_fid; | |
1479 | req->VolatileFileId = volatile_fid; | |
1480 | ||
1481 | if (indatalen) { | |
1482 | req->InputCount = cpu_to_le32(indatalen); | |
1483 | /* do not set InputOffset if no input data */ | |
1484 | req->InputOffset = | |
1485 | cpu_to_le32(offsetof(struct smb2_ioctl_req, Buffer) - 4); | |
1486 | iov[1].iov_base = in_data; | |
1487 | iov[1].iov_len = indatalen; | |
1488 | num_iovecs = 2; | |
1489 | } else | |
1490 | num_iovecs = 1; | |
1491 | ||
1492 | req->OutputOffset = 0; | |
1493 | req->OutputCount = 0; /* MBZ */ | |
1494 | ||
1495 | /* | |
1496 | * Could increase MaxOutputResponse, but that would require more | |
1497 | * than one credit. Windows typically sets this smaller, but for some | |
1498 | * ioctls it may be useful to allow server to send more. No point | |
1499 | * limiting what the server can send as long as fits in one credit | |
1500 | */ | |
1501 | req->MaxOutputResponse = cpu_to_le32(0xFF00); /* < 64K uses 1 credit */ | |
1502 | ||
1503 | if (is_fsctl) | |
1504 | req->Flags = cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL); | |
1505 | else | |
1506 | req->Flags = 0; | |
1507 | ||
1508 | iov[0].iov_base = (char *)req; | |
4a72dafa | 1509 | |
7ff8d45c SF |
1510 | /* |
1511 | * If no input data, the size of ioctl struct in | |
1512 | * protocol spec still includes a 1 byte data buffer, | |
1513 | * but if input data passed to ioctl, we do not | |
1514 | * want to double count this, so we do not send | |
1515 | * the dummy one byte of data in iovec[0] if sending | |
1516 | * input data (in iovec[1]). We also must add 4 bytes | |
1517 | * in first iovec to allow for rfc1002 length field. | |
1518 | */ | |
1519 | ||
1520 | if (indatalen) { | |
1521 | iov[0].iov_len = get_rfc1002_length(req) + 4 - 1; | |
1522 | inc_rfc1001_len(req, indatalen - 1); | |
1523 | } else | |
1524 | iov[0].iov_len = get_rfc1002_length(req) + 4; | |
1525 | ||
4a72dafa SF |
1526 | |
1527 | rc = SendReceive2(xid, ses, iov, num_iovecs, &resp_buftype, 0); | |
1528 | rsp = (struct smb2_ioctl_rsp *)iov[0].iov_base; | |
1529 | ||
9bf0c9cd | 1530 | if ((rc != 0) && (rc != -EINVAL)) { |
8e353106 | 1531 | cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE); |
4a72dafa | 1532 | goto ioctl_exit; |
9bf0c9cd SF |
1533 | } else if (rc == -EINVAL) { |
1534 | if ((opcode != FSCTL_SRV_COPYCHUNK_WRITE) && | |
1535 | (opcode != FSCTL_SRV_COPYCHUNK)) { | |
8e353106 | 1536 | cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE); |
9bf0c9cd SF |
1537 | goto ioctl_exit; |
1538 | } | |
4a72dafa SF |
1539 | } |
1540 | ||
1541 | /* check if caller wants to look at return data or just return rc */ | |
1542 | if ((plen == NULL) || (out_data == NULL)) | |
1543 | goto ioctl_exit; | |
1544 | ||
1545 | *plen = le32_to_cpu(rsp->OutputCount); | |
1546 | ||
1547 | /* We check for obvious errors in the output buffer length and offset */ | |
1548 | if (*plen == 0) | |
1549 | goto ioctl_exit; /* server returned no data */ | |
1550 | else if (*plen > 0xFF00) { | |
1551 | cifs_dbg(VFS, "srv returned invalid ioctl length: %d\n", *plen); | |
1552 | *plen = 0; | |
1553 | rc = -EIO; | |
1554 | goto ioctl_exit; | |
1555 | } | |
1556 | ||
1557 | if (get_rfc1002_length(rsp) < le32_to_cpu(rsp->OutputOffset) + *plen) { | |
1558 | cifs_dbg(VFS, "Malformed ioctl resp: len %d offset %d\n", *plen, | |
1559 | le32_to_cpu(rsp->OutputOffset)); | |
1560 | *plen = 0; | |
1561 | rc = -EIO; | |
1562 | goto ioctl_exit; | |
1563 | } | |
1564 | ||
1565 | *out_data = kmalloc(*plen, GFP_KERNEL); | |
1566 | if (*out_data == NULL) { | |
1567 | rc = -ENOMEM; | |
1568 | goto ioctl_exit; | |
1569 | } | |
1570 | ||
373512ec SF |
1571 | memcpy(*out_data, |
1572 | (char *)&rsp->hdr.ProtocolId + le32_to_cpu(rsp->OutputOffset), | |
4a72dafa SF |
1573 | *plen); |
1574 | ioctl_exit: | |
1575 | free_rsp_buf(resp_buftype, rsp); | |
1576 | return rc; | |
1577 | } | |
1578 | ||
64a5cfa6 SF |
1579 | /* |
1580 | * Individual callers to ioctl worker function follow | |
1581 | */ | |
1582 | ||
1583 | int | |
1584 | SMB2_set_compression(const unsigned int xid, struct cifs_tcon *tcon, | |
1585 | u64 persistent_fid, u64 volatile_fid) | |
1586 | { | |
1587 | int rc; | |
64a5cfa6 SF |
1588 | struct compress_ioctl fsctl_input; |
1589 | char *ret_data = NULL; | |
1590 | ||
1591 | fsctl_input.CompressionState = | |
bc09d141 | 1592 | cpu_to_le16(COMPRESSION_FORMAT_DEFAULT); |
64a5cfa6 SF |
1593 | |
1594 | rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid, | |
1595 | FSCTL_SET_COMPRESSION, true /* is_fsctl */, | |
1596 | (char *)&fsctl_input /* data input */, | |
1597 | 2 /* in data len */, &ret_data /* out data */, NULL); | |
1598 | ||
1599 | cifs_dbg(FYI, "set compression rc %d\n", rc); | |
64a5cfa6 SF |
1600 | |
1601 | return rc; | |
1602 | } | |
1603 | ||
2503a0db PS |
1604 | int |
1605 | SMB2_close(const unsigned int xid, struct cifs_tcon *tcon, | |
1606 | u64 persistent_fid, u64 volatile_fid) | |
1607 | { | |
1608 | struct smb2_close_req *req; | |
1609 | struct smb2_close_rsp *rsp; | |
1610 | struct TCP_Server_Info *server; | |
1611 | struct cifs_ses *ses = tcon->ses; | |
1612 | struct kvec iov[1]; | |
1613 | int resp_buftype; | |
1614 | int rc = 0; | |
1615 | ||
f96637be | 1616 | cifs_dbg(FYI, "Close\n"); |
2503a0db PS |
1617 | |
1618 | if (ses && (ses->server)) | |
1619 | server = ses->server; | |
1620 | else | |
1621 | return -EIO; | |
1622 | ||
1623 | rc = small_smb2_init(SMB2_CLOSE, tcon, (void **) &req); | |
1624 | if (rc) | |
1625 | return rc; | |
1626 | ||
1627 | req->PersistentFileId = persistent_fid; | |
1628 | req->VolatileFileId = volatile_fid; | |
1629 | ||
1630 | iov[0].iov_base = (char *)req; | |
1631 | /* 4 for rfc1002 length field */ | |
1632 | iov[0].iov_len = get_rfc1002_length(req) + 4; | |
1633 | ||
1634 | rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0); | |
1635 | rsp = (struct smb2_close_rsp *)iov[0].iov_base; | |
1636 | ||
1637 | if (rc != 0) { | |
d4a029d2 | 1638 | cifs_stats_fail_inc(tcon, SMB2_CLOSE_HE); |
2503a0db PS |
1639 | goto close_exit; |
1640 | } | |
1641 | ||
2503a0db PS |
1642 | /* BB FIXME - decode close response, update inode for caching */ |
1643 | ||
1644 | close_exit: | |
1645 | free_rsp_buf(resp_buftype, rsp); | |
1646 | return rc; | |
1647 | } | |
be4cb9e3 PS |
1648 | |
1649 | static int | |
1650 | validate_buf(unsigned int offset, unsigned int buffer_length, | |
1651 | struct smb2_hdr *hdr, unsigned int min_buf_size) | |
1652 | ||
1653 | { | |
1654 | unsigned int smb_len = be32_to_cpu(hdr->smb2_buf_length); | |
1655 | char *end_of_smb = smb_len + 4 /* RFC1001 length field */ + (char *)hdr; | |
1656 | char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr; | |
1657 | char *end_of_buf = begin_of_buf + buffer_length; | |
1658 | ||
1659 | ||
1660 | if (buffer_length < min_buf_size) { | |
f96637be JP |
1661 | cifs_dbg(VFS, "buffer length %d smaller than minimum size %d\n", |
1662 | buffer_length, min_buf_size); | |
be4cb9e3 PS |
1663 | return -EINVAL; |
1664 | } | |
1665 | ||
1666 | /* check if beyond RFC1001 maximum length */ | |
1667 | if ((smb_len > 0x7FFFFF) || (buffer_length > 0x7FFFFF)) { | |
f96637be JP |
1668 | cifs_dbg(VFS, "buffer length %d or smb length %d too large\n", |
1669 | buffer_length, smb_len); | |
be4cb9e3 PS |
1670 | return -EINVAL; |
1671 | } | |
1672 | ||
1673 | if ((begin_of_buf > end_of_smb) || (end_of_buf > end_of_smb)) { | |
f96637be | 1674 | cifs_dbg(VFS, "illegal server response, bad offset to data\n"); |
be4cb9e3 PS |
1675 | return -EINVAL; |
1676 | } | |
1677 | ||
1678 | return 0; | |
1679 | } | |
1680 | ||
1681 | /* | |
1682 | * If SMB buffer fields are valid, copy into temporary buffer to hold result. | |
1683 | * Caller must free buffer. | |
1684 | */ | |
1685 | static int | |
1686 | validate_and_copy_buf(unsigned int offset, unsigned int buffer_length, | |
1687 | struct smb2_hdr *hdr, unsigned int minbufsize, | |
1688 | char *data) | |
1689 | ||
1690 | { | |
1691 | char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr; | |
1692 | int rc; | |
1693 | ||
1694 | if (!data) | |
1695 | return -EINVAL; | |
1696 | ||
1697 | rc = validate_buf(offset, buffer_length, hdr, minbufsize); | |
1698 | if (rc) | |
1699 | return rc; | |
1700 | ||
1701 | memcpy(data, begin_of_buf, buffer_length); | |
1702 | ||
1703 | return 0; | |
1704 | } | |
1705 | ||
f0df737e PS |
1706 | static int |
1707 | query_info(const unsigned int xid, struct cifs_tcon *tcon, | |
1708 | u64 persistent_fid, u64 volatile_fid, u8 info_class, | |
1709 | size_t output_len, size_t min_len, void *data) | |
be4cb9e3 PS |
1710 | { |
1711 | struct smb2_query_info_req *req; | |
1712 | struct smb2_query_info_rsp *rsp = NULL; | |
1713 | struct kvec iov[2]; | |
1714 | int rc = 0; | |
1715 | int resp_buftype; | |
1716 | struct TCP_Server_Info *server; | |
1717 | struct cifs_ses *ses = tcon->ses; | |
1718 | ||
f96637be | 1719 | cifs_dbg(FYI, "Query Info\n"); |
be4cb9e3 PS |
1720 | |
1721 | if (ses && (ses->server)) | |
1722 | server = ses->server; | |
1723 | else | |
1724 | return -EIO; | |
1725 | ||
1726 | rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req); | |
1727 | if (rc) | |
1728 | return rc; | |
1729 | ||
1730 | req->InfoType = SMB2_O_INFO_FILE; | |
f0df737e | 1731 | req->FileInfoClass = info_class; |
be4cb9e3 PS |
1732 | req->PersistentFileId = persistent_fid; |
1733 | req->VolatileFileId = volatile_fid; | |
1734 | /* 4 for rfc1002 length field and 1 for Buffer */ | |
1735 | req->InputBufferOffset = | |
1736 | cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4); | |
f0df737e | 1737 | req->OutputBufferLength = cpu_to_le32(output_len); |
be4cb9e3 PS |
1738 | |
1739 | iov[0].iov_base = (char *)req; | |
1740 | /* 4 for rfc1002 length field */ | |
1741 | iov[0].iov_len = get_rfc1002_length(req) + 4; | |
1742 | ||
1743 | rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0); | |
e5d04887 PS |
1744 | rsp = (struct smb2_query_info_rsp *)iov[0].iov_base; |
1745 | ||
be4cb9e3 PS |
1746 | if (rc) { |
1747 | cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE); | |
1748 | goto qinf_exit; | |
1749 | } | |
1750 | ||
be4cb9e3 PS |
1751 | rc = validate_and_copy_buf(le16_to_cpu(rsp->OutputBufferOffset), |
1752 | le32_to_cpu(rsp->OutputBufferLength), | |
f0df737e | 1753 | &rsp->hdr, min_len, data); |
be4cb9e3 PS |
1754 | |
1755 | qinf_exit: | |
1756 | free_rsp_buf(resp_buftype, rsp); | |
1757 | return rc; | |
1758 | } | |
9094fad1 | 1759 | |
f0df737e PS |
1760 | int |
1761 | SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon, | |
1762 | u64 persistent_fid, u64 volatile_fid, | |
1763 | struct smb2_file_all_info *data) | |
1764 | { | |
1765 | return query_info(xid, tcon, persistent_fid, volatile_fid, | |
1766 | FILE_ALL_INFORMATION, | |
1bbe4997 | 1767 | sizeof(struct smb2_file_all_info) + PATH_MAX * 2, |
f0df737e PS |
1768 | sizeof(struct smb2_file_all_info), data); |
1769 | } | |
1770 | ||
1771 | int | |
1772 | SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon, | |
1773 | u64 persistent_fid, u64 volatile_fid, __le64 *uniqueid) | |
1774 | { | |
1775 | return query_info(xid, tcon, persistent_fid, volatile_fid, | |
1776 | FILE_INTERNAL_INFORMATION, | |
1777 | sizeof(struct smb2_file_internal_info), | |
1778 | sizeof(struct smb2_file_internal_info), uniqueid); | |
1779 | } | |
1780 | ||
9094fad1 PS |
1781 | /* |
1782 | * This is a no-op for now. We're not really interested in the reply, but | |
1783 | * rather in the fact that the server sent one and that server->lstrp | |
1784 | * gets updated. | |
1785 | * | |
1786 | * FIXME: maybe we should consider checking that the reply matches request? | |
1787 | */ | |
1788 | static void | |
1789 | smb2_echo_callback(struct mid_q_entry *mid) | |
1790 | { | |
1791 | struct TCP_Server_Info *server = mid->callback_data; | |
1792 | struct smb2_echo_rsp *smb2 = (struct smb2_echo_rsp *)mid->resp_buf; | |
1793 | unsigned int credits_received = 1; | |
1794 | ||
1795 | if (mid->mid_state == MID_RESPONSE_RECEIVED) | |
1796 | credits_received = le16_to_cpu(smb2->hdr.CreditRequest); | |
1797 | ||
5fb4e288 | 1798 | mutex_lock(&server->srv_mutex); |
9094fad1 | 1799 | DeleteMidQEntry(mid); |
5fb4e288 | 1800 | mutex_unlock(&server->srv_mutex); |
9094fad1 PS |
1801 | add_credits(server, credits_received, CIFS_ECHO_OP); |
1802 | } | |
1803 | ||
1804 | int | |
1805 | SMB2_echo(struct TCP_Server_Info *server) | |
1806 | { | |
1807 | struct smb2_echo_req *req; | |
1808 | int rc = 0; | |
1809 | struct kvec iov; | |
fec344e3 JL |
1810 | struct smb_rqst rqst = { .rq_iov = &iov, |
1811 | .rq_nvec = 1 }; | |
9094fad1 | 1812 | |
f96637be | 1813 | cifs_dbg(FYI, "In echo request\n"); |
9094fad1 | 1814 | |
4fcd1813 SF |
1815 | if (server->tcpStatus == CifsNeedNegotiate) { |
1816 | struct list_head *tmp, *tmp2; | |
1817 | struct cifs_ses *ses; | |
1818 | struct cifs_tcon *tcon; | |
1819 | ||
1820 | cifs_dbg(FYI, "Need negotiate, reconnecting tcons\n"); | |
1821 | spin_lock(&cifs_tcp_ses_lock); | |
1822 | list_for_each(tmp, &server->smb_ses_list) { | |
1823 | ses = list_entry(tmp, struct cifs_ses, smb_ses_list); | |
1824 | list_for_each(tmp2, &ses->tcon_list) { | |
1825 | tcon = list_entry(tmp2, struct cifs_tcon, | |
1826 | tcon_list); | |
1827 | /* add check for persistent handle reconnect */ | |
1828 | if (tcon && tcon->need_reconnect) { | |
1829 | spin_unlock(&cifs_tcp_ses_lock); | |
1830 | rc = smb2_reconnect(SMB2_ECHO, tcon); | |
1831 | spin_lock(&cifs_tcp_ses_lock); | |
1832 | } | |
1833 | } | |
1834 | } | |
1835 | spin_unlock(&cifs_tcp_ses_lock); | |
1836 | } | |
1837 | ||
1838 | /* if no session, renegotiate failed above */ | |
1839 | if (server->tcpStatus == CifsNeedNegotiate) | |
1840 | return -EIO; | |
1841 | ||
9094fad1 PS |
1842 | rc = small_smb2_init(SMB2_ECHO, NULL, (void **)&req); |
1843 | if (rc) | |
1844 | return rc; | |
1845 | ||
1846 | req->hdr.CreditRequest = cpu_to_le16(1); | |
1847 | ||
1848 | iov.iov_base = (char *)req; | |
1849 | /* 4 for rfc1002 length field */ | |
1850 | iov.iov_len = get_rfc1002_length(req) + 4; | |
1851 | ||
fec344e3 | 1852 | rc = cifs_call_async(server, &rqst, NULL, smb2_echo_callback, server, |
9094fad1 PS |
1853 | CIFS_ECHO_OP); |
1854 | if (rc) | |
f96637be | 1855 | cifs_dbg(FYI, "Echo request failed: %d\n", rc); |
9094fad1 PS |
1856 | |
1857 | cifs_small_buf_release(req); | |
1858 | return rc; | |
1859 | } | |
7a5cfb19 PS |
1860 | |
1861 | int | |
1862 | SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, | |
1863 | u64 volatile_fid) | |
1864 | { | |
1865 | struct smb2_flush_req *req; | |
1866 | struct TCP_Server_Info *server; | |
1867 | struct cifs_ses *ses = tcon->ses; | |
1868 | struct kvec iov[1]; | |
1869 | int resp_buftype; | |
1870 | int rc = 0; | |
1871 | ||
f96637be | 1872 | cifs_dbg(FYI, "Flush\n"); |
7a5cfb19 PS |
1873 | |
1874 | if (ses && (ses->server)) | |
1875 | server = ses->server; | |
1876 | else | |
1877 | return -EIO; | |
1878 | ||
1879 | rc = small_smb2_init(SMB2_FLUSH, tcon, (void **) &req); | |
1880 | if (rc) | |
1881 | return rc; | |
1882 | ||
1883 | req->PersistentFileId = persistent_fid; | |
1884 | req->VolatileFileId = volatile_fid; | |
1885 | ||
1886 | iov[0].iov_base = (char *)req; | |
1887 | /* 4 for rfc1002 length field */ | |
1888 | iov[0].iov_len = get_rfc1002_length(req) + 4; | |
1889 | ||
1890 | rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0); | |
1891 | ||
dfebe400 | 1892 | if (rc != 0) |
7a5cfb19 PS |
1893 | cifs_stats_fail_inc(tcon, SMB2_FLUSH_HE); |
1894 | ||
1895 | free_rsp_buf(resp_buftype, iov[0].iov_base); | |
1896 | return rc; | |
1897 | } | |
09a4707e PS |
1898 | |
1899 | /* | |
1900 | * To form a chain of read requests, any read requests after the first should | |
1901 | * have the end_of_chain boolean set to true. | |
1902 | */ | |
1903 | static int | |
1904 | smb2_new_read_req(struct kvec *iov, struct cifs_io_parms *io_parms, | |
1905 | unsigned int remaining_bytes, int request_type) | |
1906 | { | |
1907 | int rc = -EACCES; | |
1908 | struct smb2_read_req *req = NULL; | |
1909 | ||
1910 | rc = small_smb2_init(SMB2_READ, io_parms->tcon, (void **) &req); | |
1911 | if (rc) | |
1912 | return rc; | |
1913 | if (io_parms->tcon->ses->server == NULL) | |
1914 | return -ECONNABORTED; | |
1915 | ||
1916 | req->hdr.ProcessId = cpu_to_le32(io_parms->pid); | |
1917 | ||
1918 | req->PersistentFileId = io_parms->persistent_fid; | |
1919 | req->VolatileFileId = io_parms->volatile_fid; | |
1920 | req->ReadChannelInfoOffset = 0; /* reserved */ | |
1921 | req->ReadChannelInfoLength = 0; /* reserved */ | |
1922 | req->Channel = 0; /* reserved */ | |
1923 | req->MinimumCount = 0; | |
1924 | req->Length = cpu_to_le32(io_parms->length); | |
1925 | req->Offset = cpu_to_le64(io_parms->offset); | |
1926 | ||
1927 | if (request_type & CHAINED_REQUEST) { | |
1928 | if (!(request_type & END_OF_CHAIN)) { | |
1929 | /* 4 for rfc1002 length field */ | |
1930 | req->hdr.NextCommand = | |
1931 | cpu_to_le32(get_rfc1002_length(req) + 4); | |
1932 | } else /* END_OF_CHAIN */ | |
1933 | req->hdr.NextCommand = 0; | |
1934 | if (request_type & RELATED_REQUEST) { | |
1935 | req->hdr.Flags |= SMB2_FLAGS_RELATED_OPERATIONS; | |
1936 | /* | |
1937 | * Related requests use info from previous read request | |
1938 | * in chain. | |
1939 | */ | |
1940 | req->hdr.SessionId = 0xFFFFFFFF; | |
1941 | req->hdr.TreeId = 0xFFFFFFFF; | |
1942 | req->PersistentFileId = 0xFFFFFFFF; | |
1943 | req->VolatileFileId = 0xFFFFFFFF; | |
1944 | } | |
1945 | } | |
1946 | if (remaining_bytes > io_parms->length) | |
1947 | req->RemainingBytes = cpu_to_le32(remaining_bytes); | |
1948 | else | |
1949 | req->RemainingBytes = 0; | |
1950 | ||
1951 | iov[0].iov_base = (char *)req; | |
1952 | /* 4 for rfc1002 length field */ | |
1953 | iov[0].iov_len = get_rfc1002_length(req) + 4; | |
1954 | return rc; | |
1955 | } | |
1956 | ||
1957 | static void | |
1958 | smb2_readv_callback(struct mid_q_entry *mid) | |
1959 | { | |
1960 | struct cifs_readdata *rdata = mid->callback_data; | |
1961 | struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink); | |
1962 | struct TCP_Server_Info *server = tcon->ses->server; | |
5819575e | 1963 | struct smb2_hdr *buf = (struct smb2_hdr *)rdata->iov.iov_base; |
09a4707e | 1964 | unsigned int credits_received = 1; |
5819575e | 1965 | struct smb_rqst rqst = { .rq_iov = &rdata->iov, |
8321fec4 JL |
1966 | .rq_nvec = 1, |
1967 | .rq_pages = rdata->pages, | |
1968 | .rq_npages = rdata->nr_pages, | |
1969 | .rq_pagesz = rdata->pagesz, | |
1970 | .rq_tailsz = rdata->tailsz }; | |
09a4707e | 1971 | |
f96637be JP |
1972 | cifs_dbg(FYI, "%s: mid=%llu state=%d result=%d bytes=%u\n", |
1973 | __func__, mid->mid, mid->mid_state, rdata->result, | |
1974 | rdata->bytes); | |
09a4707e PS |
1975 | |
1976 | switch (mid->mid_state) { | |
1977 | case MID_RESPONSE_RECEIVED: | |
1978 | credits_received = le16_to_cpu(buf->CreditRequest); | |
1979 | /* result already set, check signature */ | |
38d77c50 | 1980 | if (server->sign) { |
3c1bf7e4 PS |
1981 | int rc; |
1982 | ||
0b688cfc | 1983 | rc = smb2_verify_signature(&rqst, server); |
3c1bf7e4 | 1984 | if (rc) |
f96637be JP |
1985 | cifs_dbg(VFS, "SMB signature verification returned error = %d\n", |
1986 | rc); | |
3c1bf7e4 | 1987 | } |
09a4707e | 1988 | /* FIXME: should this be counted toward the initiating task? */ |
34a54d61 PS |
1989 | task_io_account_read(rdata->got_bytes); |
1990 | cifs_stats_bytes_read(tcon, rdata->got_bytes); | |
09a4707e PS |
1991 | break; |
1992 | case MID_REQUEST_SUBMITTED: | |
1993 | case MID_RETRY_NEEDED: | |
1994 | rdata->result = -EAGAIN; | |
d913ed17 PS |
1995 | if (server->sign && rdata->got_bytes) |
1996 | /* reset bytes number since we can not check a sign */ | |
1997 | rdata->got_bytes = 0; | |
1998 | /* FIXME: should this be counted toward the initiating task? */ | |
1999 | task_io_account_read(rdata->got_bytes); | |
2000 | cifs_stats_bytes_read(tcon, rdata->got_bytes); | |
09a4707e PS |
2001 | break; |
2002 | default: | |
2003 | if (rdata->result != -ENODATA) | |
2004 | rdata->result = -EIO; | |
2005 | } | |
2006 | ||
2007 | if (rdata->result) | |
2008 | cifs_stats_fail_inc(tcon, SMB2_READ_HE); | |
2009 | ||
2010 | queue_work(cifsiod_wq, &rdata->work); | |
5fb4e288 | 2011 | mutex_lock(&server->srv_mutex); |
09a4707e | 2012 | DeleteMidQEntry(mid); |
5fb4e288 | 2013 | mutex_unlock(&server->srv_mutex); |
09a4707e PS |
2014 | add_credits(server, credits_received, 0); |
2015 | } | |
2016 | ||
2017 | /* smb2_async_readv - send an async write, and set up mid to handle result */ | |
2018 | int | |
2019 | smb2_async_readv(struct cifs_readdata *rdata) | |
2020 | { | |
bed9da02 | 2021 | int rc, flags = 0; |
09a4707e PS |
2022 | struct smb2_hdr *buf; |
2023 | struct cifs_io_parms io_parms; | |
5819575e | 2024 | struct smb_rqst rqst = { .rq_iov = &rdata->iov, |
fec344e3 | 2025 | .rq_nvec = 1 }; |
bed9da02 | 2026 | struct TCP_Server_Info *server; |
09a4707e | 2027 | |
f96637be JP |
2028 | cifs_dbg(FYI, "%s: offset=%llu bytes=%u\n", |
2029 | __func__, rdata->offset, rdata->bytes); | |
09a4707e PS |
2030 | |
2031 | io_parms.tcon = tlink_tcon(rdata->cfile->tlink); | |
2032 | io_parms.offset = rdata->offset; | |
2033 | io_parms.length = rdata->bytes; | |
2034 | io_parms.persistent_fid = rdata->cfile->fid.persistent_fid; | |
2035 | io_parms.volatile_fid = rdata->cfile->fid.volatile_fid; | |
2036 | io_parms.pid = rdata->pid; | |
bed9da02 PS |
2037 | |
2038 | server = io_parms.tcon->ses->server; | |
2039 | ||
5819575e | 2040 | rc = smb2_new_read_req(&rdata->iov, &io_parms, 0, 0); |
bed9da02 PS |
2041 | if (rc) { |
2042 | if (rc == -EAGAIN && rdata->credits) { | |
2043 | /* credits was reset by reconnect */ | |
2044 | rdata->credits = 0; | |
2045 | /* reduce in_flight value since we won't send the req */ | |
2046 | spin_lock(&server->req_lock); | |
2047 | server->in_flight--; | |
2048 | spin_unlock(&server->req_lock); | |
2049 | } | |
09a4707e | 2050 | return rc; |
bed9da02 | 2051 | } |
09a4707e | 2052 | |
5819575e | 2053 | buf = (struct smb2_hdr *)rdata->iov.iov_base; |
09a4707e | 2054 | /* 4 for rfc1002 length field */ |
5819575e | 2055 | rdata->iov.iov_len = get_rfc1002_length(rdata->iov.iov_base) + 4; |
09a4707e | 2056 | |
bed9da02 PS |
2057 | if (rdata->credits) { |
2058 | buf->CreditCharge = cpu_to_le16(DIV_ROUND_UP(rdata->bytes, | |
2059 | SMB2_MAX_BUFFER_SIZE)); | |
2060 | spin_lock(&server->req_lock); | |
2061 | server->credits += rdata->credits - | |
2062 | le16_to_cpu(buf->CreditCharge); | |
2063 | spin_unlock(&server->req_lock); | |
2064 | wake_up(&server->request_q); | |
2065 | flags = CIFS_HAS_CREDITS; | |
2066 | } | |
2067 | ||
09a4707e | 2068 | kref_get(&rdata->refcount); |
fec344e3 | 2069 | rc = cifs_call_async(io_parms.tcon->ses->server, &rqst, |
09a4707e | 2070 | cifs_readv_receive, smb2_readv_callback, |
bed9da02 | 2071 | rdata, flags); |
e5d04887 | 2072 | if (rc) { |
09a4707e | 2073 | kref_put(&rdata->refcount, cifs_readdata_release); |
e5d04887 PS |
2074 | cifs_stats_fail_inc(io_parms.tcon, SMB2_READ_HE); |
2075 | } | |
09a4707e PS |
2076 | |
2077 | cifs_small_buf_release(buf); | |
2078 | return rc; | |
2079 | } | |
33319141 | 2080 | |
d8e05039 PS |
2081 | int |
2082 | SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms, | |
2083 | unsigned int *nbytes, char **buf, int *buf_type) | |
2084 | { | |
2085 | int resp_buftype, rc = -EACCES; | |
2086 | struct smb2_read_rsp *rsp = NULL; | |
2087 | struct kvec iov[1]; | |
2088 | ||
2089 | *nbytes = 0; | |
2090 | rc = smb2_new_read_req(iov, io_parms, 0, 0); | |
2091 | if (rc) | |
2092 | return rc; | |
2093 | ||
2094 | rc = SendReceive2(xid, io_parms->tcon->ses, iov, 1, | |
2095 | &resp_buftype, CIFS_LOG_ERROR); | |
2096 | ||
2097 | rsp = (struct smb2_read_rsp *)iov[0].iov_base; | |
2098 | ||
2099 | if (rsp->hdr.Status == STATUS_END_OF_FILE) { | |
2100 | free_rsp_buf(resp_buftype, iov[0].iov_base); | |
2101 | return 0; | |
2102 | } | |
2103 | ||
2104 | if (rc) { | |
2105 | cifs_stats_fail_inc(io_parms->tcon, SMB2_READ_HE); | |
f96637be | 2106 | cifs_dbg(VFS, "Send error in read = %d\n", rc); |
d8e05039 PS |
2107 | } else { |
2108 | *nbytes = le32_to_cpu(rsp->DataLength); | |
2109 | if ((*nbytes > CIFS_MAX_MSGSIZE) || | |
2110 | (*nbytes > io_parms->length)) { | |
f96637be JP |
2111 | cifs_dbg(FYI, "bad length %d for count %d\n", |
2112 | *nbytes, io_parms->length); | |
d8e05039 PS |
2113 | rc = -EIO; |
2114 | *nbytes = 0; | |
2115 | } | |
2116 | } | |
2117 | ||
2118 | if (*buf) { | |
373512ec | 2119 | memcpy(*buf, (char *)&rsp->hdr.ProtocolId + rsp->DataOffset, |
d8e05039 PS |
2120 | *nbytes); |
2121 | free_rsp_buf(resp_buftype, iov[0].iov_base); | |
2122 | } else if (resp_buftype != CIFS_NO_BUFFER) { | |
2123 | *buf = iov[0].iov_base; | |
2124 | if (resp_buftype == CIFS_SMALL_BUFFER) | |
2125 | *buf_type = CIFS_SMALL_BUFFER; | |
2126 | else if (resp_buftype == CIFS_LARGE_BUFFER) | |
2127 | *buf_type = CIFS_LARGE_BUFFER; | |
2128 | } | |
2129 | return rc; | |
2130 | } | |
2131 | ||
33319141 PS |
2132 | /* |
2133 | * Check the mid_state and signature on received buffer (if any), and queue the | |
2134 | * workqueue completion task. | |
2135 | */ | |
2136 | static void | |
2137 | smb2_writev_callback(struct mid_q_entry *mid) | |
2138 | { | |
2139 | struct cifs_writedata *wdata = mid->callback_data; | |
2140 | struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink); | |
5fb4e288 | 2141 | struct TCP_Server_Info *server = tcon->ses->server; |
33319141 PS |
2142 | unsigned int written; |
2143 | struct smb2_write_rsp *rsp = (struct smb2_write_rsp *)mid->resp_buf; | |
2144 | unsigned int credits_received = 1; | |
2145 | ||
2146 | switch (mid->mid_state) { | |
2147 | case MID_RESPONSE_RECEIVED: | |
2148 | credits_received = le16_to_cpu(rsp->hdr.CreditRequest); | |
2149 | wdata->result = smb2_check_receive(mid, tcon->ses->server, 0); | |
2150 | if (wdata->result != 0) | |
2151 | break; | |
2152 | ||
2153 | written = le32_to_cpu(rsp->DataLength); | |
2154 | /* | |
2155 | * Mask off high 16 bits when bytes written as returned | |
2156 | * by the server is greater than bytes requested by the | |
2157 | * client. OS/2 servers are known to set incorrect | |
2158 | * CountHigh values. | |
2159 | */ | |
2160 | if (written > wdata->bytes) | |
2161 | written &= 0xFFFF; | |
2162 | ||
2163 | if (written < wdata->bytes) | |
2164 | wdata->result = -ENOSPC; | |
2165 | else | |
2166 | wdata->bytes = written; | |
2167 | break; | |
2168 | case MID_REQUEST_SUBMITTED: | |
2169 | case MID_RETRY_NEEDED: | |
2170 | wdata->result = -EAGAIN; | |
2171 | break; | |
2172 | default: | |
2173 | wdata->result = -EIO; | |
2174 | break; | |
2175 | } | |
2176 | ||
2177 | if (wdata->result) | |
2178 | cifs_stats_fail_inc(tcon, SMB2_WRITE_HE); | |
2179 | ||
2180 | queue_work(cifsiod_wq, &wdata->work); | |
5fb4e288 | 2181 | mutex_lock(&server->srv_mutex); |
33319141 | 2182 | DeleteMidQEntry(mid); |
5fb4e288 | 2183 | mutex_unlock(&server->srv_mutex); |
33319141 PS |
2184 | add_credits(tcon->ses->server, credits_received, 0); |
2185 | } | |
2186 | ||
2187 | /* smb2_async_writev - send an async write, and set up mid to handle result */ | |
2188 | int | |
4a5c80d7 SF |
2189 | smb2_async_writev(struct cifs_writedata *wdata, |
2190 | void (*release)(struct kref *kref)) | |
33319141 | 2191 | { |
cb7e9eab | 2192 | int rc = -EACCES, flags = 0; |
33319141 PS |
2193 | struct smb2_write_req *req = NULL; |
2194 | struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink); | |
cb7e9eab | 2195 | struct TCP_Server_Info *server = tcon->ses->server; |
eddb079d | 2196 | struct kvec iov; |
fec344e3 | 2197 | struct smb_rqst rqst; |
33319141 PS |
2198 | |
2199 | rc = small_smb2_init(SMB2_WRITE, tcon, (void **) &req); | |
cb7e9eab PS |
2200 | if (rc) { |
2201 | if (rc == -EAGAIN && wdata->credits) { | |
2202 | /* credits was reset by reconnect */ | |
2203 | wdata->credits = 0; | |
2204 | /* reduce in_flight value since we won't send the req */ | |
2205 | spin_lock(&server->req_lock); | |
2206 | server->in_flight--; | |
2207 | spin_unlock(&server->req_lock); | |
2208 | } | |
33319141 | 2209 | goto async_writev_out; |
cb7e9eab | 2210 | } |
33319141 | 2211 | |
33319141 PS |
2212 | req->hdr.ProcessId = cpu_to_le32(wdata->cfile->pid); |
2213 | ||
2214 | req->PersistentFileId = wdata->cfile->fid.persistent_fid; | |
2215 | req->VolatileFileId = wdata->cfile->fid.volatile_fid; | |
2216 | req->WriteChannelInfoOffset = 0; | |
2217 | req->WriteChannelInfoLength = 0; | |
2218 | req->Channel = 0; | |
2219 | req->Offset = cpu_to_le64(wdata->offset); | |
2220 | /* 4 for rfc1002 length field */ | |
2221 | req->DataOffset = cpu_to_le16( | |
2222 | offsetof(struct smb2_write_req, Buffer) - 4); | |
2223 | req->RemainingBytes = 0; | |
2224 | ||
2225 | /* 4 for rfc1002 length field and 1 for Buffer */ | |
eddb079d JL |
2226 | iov.iov_len = get_rfc1002_length(req) + 4 - 1; |
2227 | iov.iov_base = req; | |
33319141 | 2228 | |
eddb079d JL |
2229 | rqst.rq_iov = &iov; |
2230 | rqst.rq_nvec = 1; | |
2231 | rqst.rq_pages = wdata->pages; | |
2232 | rqst.rq_npages = wdata->nr_pages; | |
2233 | rqst.rq_pagesz = wdata->pagesz; | |
2234 | rqst.rq_tailsz = wdata->tailsz; | |
33319141 | 2235 | |
f96637be JP |
2236 | cifs_dbg(FYI, "async write at %llu %u bytes\n", |
2237 | wdata->offset, wdata->bytes); | |
33319141 PS |
2238 | |
2239 | req->Length = cpu_to_le32(wdata->bytes); | |
2240 | ||
2241 | inc_rfc1001_len(&req->hdr, wdata->bytes - 1 /* Buffer */); | |
2242 | ||
cb7e9eab PS |
2243 | if (wdata->credits) { |
2244 | req->hdr.CreditCharge = cpu_to_le16(DIV_ROUND_UP(wdata->bytes, | |
2245 | SMB2_MAX_BUFFER_SIZE)); | |
2246 | spin_lock(&server->req_lock); | |
2247 | server->credits += wdata->credits - | |
2248 | le16_to_cpu(req->hdr.CreditCharge); | |
2249 | spin_unlock(&server->req_lock); | |
2250 | wake_up(&server->request_q); | |
2251 | flags = CIFS_HAS_CREDITS; | |
2252 | } | |
2253 | ||
33319141 | 2254 | kref_get(&wdata->refcount); |
cb7e9eab PS |
2255 | rc = cifs_call_async(server, &rqst, NULL, smb2_writev_callback, wdata, |
2256 | flags); | |
33319141 | 2257 | |
e5d04887 | 2258 | if (rc) { |
4a5c80d7 | 2259 | kref_put(&wdata->refcount, release); |
e5d04887 PS |
2260 | cifs_stats_fail_inc(tcon, SMB2_WRITE_HE); |
2261 | } | |
33319141 | 2262 | |
33319141 PS |
2263 | async_writev_out: |
2264 | cifs_small_buf_release(req); | |
33319141 PS |
2265 | return rc; |
2266 | } | |
009d3443 PS |
2267 | |
2268 | /* | |
2269 | * SMB2_write function gets iov pointer to kvec array with n_vec as a length. | |
2270 | * The length field from io_parms must be at least 1 and indicates a number of | |
2271 | * elements with data to write that begins with position 1 in iov array. All | |
2272 | * data length is specified by count. | |
2273 | */ | |
2274 | int | |
2275 | SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms, | |
2276 | unsigned int *nbytes, struct kvec *iov, int n_vec) | |
2277 | { | |
2278 | int rc = 0; | |
2279 | struct smb2_write_req *req = NULL; | |
2280 | struct smb2_write_rsp *rsp = NULL; | |
2281 | int resp_buftype; | |
2282 | *nbytes = 0; | |
2283 | ||
2284 | if (n_vec < 1) | |
2285 | return rc; | |
2286 | ||
2287 | rc = small_smb2_init(SMB2_WRITE, io_parms->tcon, (void **) &req); | |
2288 | if (rc) | |
2289 | return rc; | |
2290 | ||
2291 | if (io_parms->tcon->ses->server == NULL) | |
2292 | return -ECONNABORTED; | |
2293 | ||
2294 | req->hdr.ProcessId = cpu_to_le32(io_parms->pid); | |
2295 | ||
2296 | req->PersistentFileId = io_parms->persistent_fid; | |
2297 | req->VolatileFileId = io_parms->volatile_fid; | |
2298 | req->WriteChannelInfoOffset = 0; | |
2299 | req->WriteChannelInfoLength = 0; | |
2300 | req->Channel = 0; | |
2301 | req->Length = cpu_to_le32(io_parms->length); | |
2302 | req->Offset = cpu_to_le64(io_parms->offset); | |
2303 | /* 4 for rfc1002 length field */ | |
2304 | req->DataOffset = cpu_to_le16( | |
2305 | offsetof(struct smb2_write_req, Buffer) - 4); | |
2306 | req->RemainingBytes = 0; | |
2307 | ||
2308 | iov[0].iov_base = (char *)req; | |
2309 | /* 4 for rfc1002 length field and 1 for Buffer */ | |
2310 | iov[0].iov_len = get_rfc1002_length(req) + 4 - 1; | |
2311 | ||
2312 | /* length of entire message including data to be written */ | |
2313 | inc_rfc1001_len(req, io_parms->length - 1 /* Buffer */); | |
2314 | ||
2315 | rc = SendReceive2(xid, io_parms->tcon->ses, iov, n_vec + 1, | |
2316 | &resp_buftype, 0); | |
e5d04887 | 2317 | rsp = (struct smb2_write_rsp *)iov[0].iov_base; |
009d3443 PS |
2318 | |
2319 | if (rc) { | |
2320 | cifs_stats_fail_inc(io_parms->tcon, SMB2_WRITE_HE); | |
f96637be | 2321 | cifs_dbg(VFS, "Send error in write = %d\n", rc); |
e5d04887 | 2322 | } else |
009d3443 | 2323 | *nbytes = le32_to_cpu(rsp->DataLength); |
e5d04887 PS |
2324 | |
2325 | free_rsp_buf(resp_buftype, rsp); | |
009d3443 PS |
2326 | return rc; |
2327 | } | |
35143eb5 | 2328 | |
d324f08d PS |
2329 | static unsigned int |
2330 | num_entries(char *bufstart, char *end_of_buf, char **lastentry, size_t size) | |
2331 | { | |
2332 | int len; | |
2333 | unsigned int entrycount = 0; | |
2334 | unsigned int next_offset = 0; | |
2335 | FILE_DIRECTORY_INFO *entryptr; | |
2336 | ||
2337 | if (bufstart == NULL) | |
2338 | return 0; | |
2339 | ||
2340 | entryptr = (FILE_DIRECTORY_INFO *)bufstart; | |
2341 | ||
2342 | while (1) { | |
2343 | entryptr = (FILE_DIRECTORY_INFO *) | |
2344 | ((char *)entryptr + next_offset); | |
2345 | ||
2346 | if ((char *)entryptr + size > end_of_buf) { | |
f96637be | 2347 | cifs_dbg(VFS, "malformed search entry would overflow\n"); |
d324f08d PS |
2348 | break; |
2349 | } | |
2350 | ||
2351 | len = le32_to_cpu(entryptr->FileNameLength); | |
2352 | if ((char *)entryptr + len + size > end_of_buf) { | |
f96637be JP |
2353 | cifs_dbg(VFS, "directory entry name would overflow frame end of buf %p\n", |
2354 | end_of_buf); | |
d324f08d PS |
2355 | break; |
2356 | } | |
2357 | ||
2358 | *lastentry = (char *)entryptr; | |
2359 | entrycount++; | |
2360 | ||
2361 | next_offset = le32_to_cpu(entryptr->NextEntryOffset); | |
2362 | if (!next_offset) | |
2363 | break; | |
2364 | } | |
2365 | ||
2366 | return entrycount; | |
2367 | } | |
2368 | ||
2369 | /* | |
2370 | * Readdir/FindFirst | |
2371 | */ | |
2372 | int | |
2373 | SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon, | |
2374 | u64 persistent_fid, u64 volatile_fid, int index, | |
2375 | struct cifs_search_info *srch_inf) | |
2376 | { | |
2377 | struct smb2_query_directory_req *req; | |
2378 | struct smb2_query_directory_rsp *rsp = NULL; | |
2379 | struct kvec iov[2]; | |
2380 | int rc = 0; | |
2381 | int len; | |
75fdfc84 | 2382 | int resp_buftype = CIFS_NO_BUFFER; |
d324f08d PS |
2383 | unsigned char *bufptr; |
2384 | struct TCP_Server_Info *server; | |
2385 | struct cifs_ses *ses = tcon->ses; | |
2386 | __le16 asteriks = cpu_to_le16('*'); | |
2387 | char *end_of_smb; | |
2388 | unsigned int output_size = CIFSMaxBufSize; | |
2389 | size_t info_buf_size; | |
2390 | ||
2391 | if (ses && (ses->server)) | |
2392 | server = ses->server; | |
2393 | else | |
2394 | return -EIO; | |
2395 | ||
2396 | rc = small_smb2_init(SMB2_QUERY_DIRECTORY, tcon, (void **) &req); | |
2397 | if (rc) | |
2398 | return rc; | |
2399 | ||
2400 | switch (srch_inf->info_level) { | |
2401 | case SMB_FIND_FILE_DIRECTORY_INFO: | |
2402 | req->FileInformationClass = FILE_DIRECTORY_INFORMATION; | |
2403 | info_buf_size = sizeof(FILE_DIRECTORY_INFO) - 1; | |
2404 | break; | |
2405 | case SMB_FIND_FILE_ID_FULL_DIR_INFO: | |
2406 | req->FileInformationClass = FILEID_FULL_DIRECTORY_INFORMATION; | |
2407 | info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO) - 1; | |
2408 | break; | |
2409 | default: | |
f96637be JP |
2410 | cifs_dbg(VFS, "info level %u isn't supported\n", |
2411 | srch_inf->info_level); | |
d324f08d PS |
2412 | rc = -EINVAL; |
2413 | goto qdir_exit; | |
2414 | } | |
2415 | ||
2416 | req->FileIndex = cpu_to_le32(index); | |
2417 | req->PersistentFileId = persistent_fid; | |
2418 | req->VolatileFileId = volatile_fid; | |
2419 | ||
2420 | len = 0x2; | |
2421 | bufptr = req->Buffer; | |
2422 | memcpy(bufptr, &asteriks, len); | |
2423 | ||
2424 | req->FileNameOffset = | |
2425 | cpu_to_le16(sizeof(struct smb2_query_directory_req) - 1 - 4); | |
2426 | req->FileNameLength = cpu_to_le16(len); | |
2427 | /* | |
2428 | * BB could be 30 bytes or so longer if we used SMB2 specific | |
2429 | * buffer lengths, but this is safe and close enough. | |
2430 | */ | |
2431 | output_size = min_t(unsigned int, output_size, server->maxBuf); | |
2432 | output_size = min_t(unsigned int, output_size, 2 << 15); | |
2433 | req->OutputBufferLength = cpu_to_le32(output_size); | |
2434 | ||
2435 | iov[0].iov_base = (char *)req; | |
2436 | /* 4 for RFC1001 length and 1 for Buffer */ | |
2437 | iov[0].iov_len = get_rfc1002_length(req) + 4 - 1; | |
2438 | ||
2439 | iov[1].iov_base = (char *)(req->Buffer); | |
2440 | iov[1].iov_len = len; | |
2441 | ||
2442 | inc_rfc1001_len(req, len - 1 /* Buffer */); | |
2443 | ||
2444 | rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, 0); | |
e5d04887 PS |
2445 | rsp = (struct smb2_query_directory_rsp *)iov[0].iov_base; |
2446 | ||
d324f08d | 2447 | if (rc) { |
52755808 PS |
2448 | if (rc == -ENODATA && rsp->hdr.Status == STATUS_NO_MORE_FILES) { |
2449 | srch_inf->endOfSearch = true; | |
2450 | rc = 0; | |
2451 | } | |
d324f08d PS |
2452 | cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE); |
2453 | goto qdir_exit; | |
2454 | } | |
d324f08d PS |
2455 | |
2456 | rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset), | |
2457 | le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr, | |
2458 | info_buf_size); | |
2459 | if (rc) | |
2460 | goto qdir_exit; | |
2461 | ||
2462 | srch_inf->unicode = true; | |
2463 | ||
2464 | if (srch_inf->ntwrk_buf_start) { | |
2465 | if (srch_inf->smallBuf) | |
2466 | cifs_small_buf_release(srch_inf->ntwrk_buf_start); | |
2467 | else | |
2468 | cifs_buf_release(srch_inf->ntwrk_buf_start); | |
2469 | } | |
2470 | srch_inf->ntwrk_buf_start = (char *)rsp; | |
2471 | srch_inf->srch_entries_start = srch_inf->last_entry = 4 /* rfclen */ + | |
2472 | (char *)&rsp->hdr + le16_to_cpu(rsp->OutputBufferOffset); | |
2473 | /* 4 for rfc1002 length field */ | |
2474 | end_of_smb = get_rfc1002_length(rsp) + 4 + (char *)&rsp->hdr; | |
2475 | srch_inf->entries_in_buffer = | |
2476 | num_entries(srch_inf->srch_entries_start, end_of_smb, | |
2477 | &srch_inf->last_entry, info_buf_size); | |
2478 | srch_inf->index_of_last_entry += srch_inf->entries_in_buffer; | |
f96637be JP |
2479 | cifs_dbg(FYI, "num entries %d last_index %lld srch start %p srch end %p\n", |
2480 | srch_inf->entries_in_buffer, srch_inf->index_of_last_entry, | |
2481 | srch_inf->srch_entries_start, srch_inf->last_entry); | |
d324f08d PS |
2482 | if (resp_buftype == CIFS_LARGE_BUFFER) |
2483 | srch_inf->smallBuf = false; | |
2484 | else if (resp_buftype == CIFS_SMALL_BUFFER) | |
2485 | srch_inf->smallBuf = true; | |
2486 | else | |
f96637be | 2487 | cifs_dbg(VFS, "illegal search buffer type\n"); |
d324f08d | 2488 | |
d324f08d PS |
2489 | return rc; |
2490 | ||
2491 | qdir_exit: | |
2492 | free_rsp_buf(resp_buftype, rsp); | |
2493 | return rc; | |
2494 | } | |
2495 | ||
35143eb5 PS |
2496 | static int |
2497 | send_set_info(const unsigned int xid, struct cifs_tcon *tcon, | |
c839ff24 | 2498 | u64 persistent_fid, u64 volatile_fid, u32 pid, int info_class, |
35143eb5 PS |
2499 | unsigned int num, void **data, unsigned int *size) |
2500 | { | |
2501 | struct smb2_set_info_req *req; | |
2502 | struct smb2_set_info_rsp *rsp = NULL; | |
2503 | struct kvec *iov; | |
2504 | int rc = 0; | |
2505 | int resp_buftype; | |
2506 | unsigned int i; | |
2507 | struct TCP_Server_Info *server; | |
2508 | struct cifs_ses *ses = tcon->ses; | |
2509 | ||
2510 | if (ses && (ses->server)) | |
2511 | server = ses->server; | |
2512 | else | |
2513 | return -EIO; | |
2514 | ||
2515 | if (!num) | |
2516 | return -EINVAL; | |
2517 | ||
2518 | iov = kmalloc(sizeof(struct kvec) * num, GFP_KERNEL); | |
2519 | if (!iov) | |
2520 | return -ENOMEM; | |
2521 | ||
2522 | rc = small_smb2_init(SMB2_SET_INFO, tcon, (void **) &req); | |
2523 | if (rc) { | |
2524 | kfree(iov); | |
2525 | return rc; | |
2526 | } | |
2527 | ||
c839ff24 PS |
2528 | req->hdr.ProcessId = cpu_to_le32(pid); |
2529 | ||
35143eb5 PS |
2530 | req->InfoType = SMB2_O_INFO_FILE; |
2531 | req->FileInfoClass = info_class; | |
2532 | req->PersistentFileId = persistent_fid; | |
2533 | req->VolatileFileId = volatile_fid; | |
2534 | ||
2535 | /* 4 for RFC1001 length and 1 for Buffer */ | |
2536 | req->BufferOffset = | |
2537 | cpu_to_le16(sizeof(struct smb2_set_info_req) - 1 - 4); | |
2538 | req->BufferLength = cpu_to_le32(*size); | |
2539 | ||
2540 | inc_rfc1001_len(req, *size - 1 /* Buffer */); | |
2541 | ||
2542 | memcpy(req->Buffer, *data, *size); | |
2543 | ||
2544 | iov[0].iov_base = (char *)req; | |
2545 | /* 4 for RFC1001 length */ | |
2546 | iov[0].iov_len = get_rfc1002_length(req) + 4; | |
2547 | ||
2548 | for (i = 1; i < num; i++) { | |
2549 | inc_rfc1001_len(req, size[i]); | |
2550 | le32_add_cpu(&req->BufferLength, size[i]); | |
2551 | iov[i].iov_base = (char *)data[i]; | |
2552 | iov[i].iov_len = size[i]; | |
2553 | } | |
2554 | ||
2555 | rc = SendReceive2(xid, ses, iov, num, &resp_buftype, 0); | |
2556 | rsp = (struct smb2_set_info_rsp *)iov[0].iov_base; | |
2557 | ||
7d3fb24b | 2558 | if (rc != 0) |
35143eb5 | 2559 | cifs_stats_fail_inc(tcon, SMB2_SET_INFO_HE); |
7d3fb24b | 2560 | |
35143eb5 PS |
2561 | free_rsp_buf(resp_buftype, rsp); |
2562 | kfree(iov); | |
2563 | return rc; | |
2564 | } | |
2565 | ||
2566 | int | |
2567 | SMB2_rename(const unsigned int xid, struct cifs_tcon *tcon, | |
2568 | u64 persistent_fid, u64 volatile_fid, __le16 *target_file) | |
2569 | { | |
2570 | struct smb2_file_rename_info info; | |
2571 | void **data; | |
2572 | unsigned int size[2]; | |
2573 | int rc; | |
2574 | int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX)); | |
2575 | ||
2576 | data = kmalloc(sizeof(void *) * 2, GFP_KERNEL); | |
2577 | if (!data) | |
2578 | return -ENOMEM; | |
2579 | ||
2580 | info.ReplaceIfExists = 1; /* 1 = replace existing target with new */ | |
2581 | /* 0 = fail if target already exists */ | |
2582 | info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */ | |
2583 | info.FileNameLength = cpu_to_le32(len); | |
2584 | ||
2585 | data[0] = &info; | |
2586 | size[0] = sizeof(struct smb2_file_rename_info); | |
2587 | ||
2588 | data[1] = target_file; | |
2589 | size[1] = len + 2 /* null */; | |
2590 | ||
2591 | rc = send_set_info(xid, tcon, persistent_fid, volatile_fid, | |
c839ff24 PS |
2592 | current->tgid, FILE_RENAME_INFORMATION, 2, data, |
2593 | size); | |
35143eb5 PS |
2594 | kfree(data); |
2595 | return rc; | |
2596 | } | |
568798cc | 2597 | |
897fba11 SF |
2598 | int |
2599 | SMB2_rmdir(const unsigned int xid, struct cifs_tcon *tcon, | |
2600 | u64 persistent_fid, u64 volatile_fid) | |
2601 | { | |
2602 | __u8 delete_pending = 1; | |
2603 | void *data; | |
2604 | unsigned int size; | |
2605 | ||
2606 | data = &delete_pending; | |
2607 | size = 1; /* sizeof __u8 */ | |
2608 | ||
2609 | return send_set_info(xid, tcon, persistent_fid, volatile_fid, | |
2610 | current->tgid, FILE_DISPOSITION_INFORMATION, 1, &data, | |
2611 | &size); | |
2612 | } | |
2613 | ||
568798cc PS |
2614 | int |
2615 | SMB2_set_hardlink(const unsigned int xid, struct cifs_tcon *tcon, | |
2616 | u64 persistent_fid, u64 volatile_fid, __le16 *target_file) | |
2617 | { | |
2618 | struct smb2_file_link_info info; | |
2619 | void **data; | |
2620 | unsigned int size[2]; | |
2621 | int rc; | |
2622 | int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX)); | |
2623 | ||
2624 | data = kmalloc(sizeof(void *) * 2, GFP_KERNEL); | |
2625 | if (!data) | |
2626 | return -ENOMEM; | |
2627 | ||
2628 | info.ReplaceIfExists = 0; /* 1 = replace existing link with new */ | |
2629 | /* 0 = fail if link already exists */ | |
2630 | info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */ | |
2631 | info.FileNameLength = cpu_to_le32(len); | |
2632 | ||
2633 | data[0] = &info; | |
2634 | size[0] = sizeof(struct smb2_file_link_info); | |
2635 | ||
2636 | data[1] = target_file; | |
2637 | size[1] = len + 2 /* null */; | |
2638 | ||
2639 | rc = send_set_info(xid, tcon, persistent_fid, volatile_fid, | |
c839ff24 | 2640 | current->tgid, FILE_LINK_INFORMATION, 2, data, size); |
568798cc PS |
2641 | kfree(data); |
2642 | return rc; | |
2643 | } | |
c839ff24 PS |
2644 | |
2645 | int | |
2646 | SMB2_set_eof(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, | |
f29ebb47 | 2647 | u64 volatile_fid, u32 pid, __le64 *eof, bool is_falloc) |
c839ff24 PS |
2648 | { |
2649 | struct smb2_file_eof_info info; | |
2650 | void *data; | |
2651 | unsigned int size; | |
2652 | ||
2653 | info.EndOfFile = *eof; | |
2654 | ||
2655 | data = &info; | |
2656 | size = sizeof(struct smb2_file_eof_info); | |
2657 | ||
f29ebb47 SF |
2658 | if (is_falloc) |
2659 | return send_set_info(xid, tcon, persistent_fid, volatile_fid, | |
2660 | pid, FILE_ALLOCATION_INFORMATION, 1, &data, &size); | |
2661 | else | |
2662 | return send_set_info(xid, tcon, persistent_fid, volatile_fid, | |
2663 | pid, FILE_END_OF_FILE_INFORMATION, 1, &data, &size); | |
c839ff24 | 2664 | } |
1feeaac7 PS |
2665 | |
2666 | int | |
2667 | SMB2_set_info(const unsigned int xid, struct cifs_tcon *tcon, | |
2668 | u64 persistent_fid, u64 volatile_fid, FILE_BASIC_INFO *buf) | |
2669 | { | |
2670 | unsigned int size; | |
2671 | size = sizeof(FILE_BASIC_INFO); | |
2672 | return send_set_info(xid, tcon, persistent_fid, volatile_fid, | |
2673 | current->tgid, FILE_BASIC_INFORMATION, 1, | |
2674 | (void **)&buf, &size); | |
2675 | } | |
983c88a4 PS |
2676 | |
2677 | int | |
2678 | SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon, | |
2679 | const u64 persistent_fid, const u64 volatile_fid, | |
2680 | __u8 oplock_level) | |
2681 | { | |
2682 | int rc; | |
2683 | struct smb2_oplock_break *req = NULL; | |
2684 | ||
f96637be | 2685 | cifs_dbg(FYI, "SMB2_oplock_break\n"); |
983c88a4 PS |
2686 | rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req); |
2687 | ||
2688 | if (rc) | |
2689 | return rc; | |
2690 | ||
2691 | req->VolatileFid = volatile_fid; | |
2692 | req->PersistentFid = persistent_fid; | |
2693 | req->OplockLevel = oplock_level; | |
2694 | req->hdr.CreditRequest = cpu_to_le16(1); | |
2695 | ||
2696 | rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, CIFS_OBREAK_OP); | |
2697 | /* SMB2 buffer freed by function above */ | |
2698 | ||
2699 | if (rc) { | |
2700 | cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE); | |
f96637be | 2701 | cifs_dbg(FYI, "Send error in Oplock Break = %d\n", rc); |
983c88a4 PS |
2702 | } |
2703 | ||
2704 | return rc; | |
2705 | } | |
6fc05c25 PS |
2706 | |
2707 | static void | |
2708 | copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info *pfs_inf, | |
2709 | struct kstatfs *kst) | |
2710 | { | |
2711 | kst->f_bsize = le32_to_cpu(pfs_inf->BytesPerSector) * | |
2712 | le32_to_cpu(pfs_inf->SectorsPerAllocationUnit); | |
2713 | kst->f_blocks = le64_to_cpu(pfs_inf->TotalAllocationUnits); | |
2714 | kst->f_bfree = le64_to_cpu(pfs_inf->ActualAvailableAllocationUnits); | |
2715 | kst->f_bavail = le64_to_cpu(pfs_inf->CallerAvailableAllocationUnits); | |
2716 | return; | |
2717 | } | |
2718 | ||
2719 | static int | |
2720 | build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon, int level, | |
2721 | int outbuf_len, u64 persistent_fid, u64 volatile_fid) | |
2722 | { | |
2723 | int rc; | |
2724 | struct smb2_query_info_req *req; | |
2725 | ||
f96637be | 2726 | cifs_dbg(FYI, "Query FSInfo level %d\n", level); |
6fc05c25 PS |
2727 | |
2728 | if ((tcon->ses == NULL) || (tcon->ses->server == NULL)) | |
2729 | return -EIO; | |
2730 | ||
2731 | rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req); | |
2732 | if (rc) | |
2733 | return rc; | |
2734 | ||
2735 | req->InfoType = SMB2_O_INFO_FILESYSTEM; | |
2736 | req->FileInfoClass = level; | |
2737 | req->PersistentFileId = persistent_fid; | |
2738 | req->VolatileFileId = volatile_fid; | |
2739 | /* 4 for rfc1002 length field and 1 for pad */ | |
2740 | req->InputBufferOffset = | |
2741 | cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4); | |
2742 | req->OutputBufferLength = cpu_to_le32( | |
2743 | outbuf_len + sizeof(struct smb2_query_info_rsp) - 1 - 4); | |
2744 | ||
2745 | iov->iov_base = (char *)req; | |
2746 | /* 4 for rfc1002 length field */ | |
2747 | iov->iov_len = get_rfc1002_length(req) + 4; | |
2748 | return 0; | |
2749 | } | |
2750 | ||
2751 | int | |
2752 | SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon, | |
2753 | u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata) | |
2754 | { | |
2755 | struct smb2_query_info_rsp *rsp = NULL; | |
2756 | struct kvec iov; | |
2757 | int rc = 0; | |
2758 | int resp_buftype; | |
2759 | struct cifs_ses *ses = tcon->ses; | |
2760 | struct smb2_fs_full_size_info *info = NULL; | |
2761 | ||
2762 | rc = build_qfs_info_req(&iov, tcon, FS_FULL_SIZE_INFORMATION, | |
2763 | sizeof(struct smb2_fs_full_size_info), | |
2764 | persistent_fid, volatile_fid); | |
2765 | if (rc) | |
2766 | return rc; | |
2767 | ||
2768 | rc = SendReceive2(xid, ses, &iov, 1, &resp_buftype, 0); | |
2769 | if (rc) { | |
2770 | cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE); | |
34f62640 | 2771 | goto qfsinf_exit; |
6fc05c25 PS |
2772 | } |
2773 | rsp = (struct smb2_query_info_rsp *)iov.iov_base; | |
2774 | ||
2775 | info = (struct smb2_fs_full_size_info *)(4 /* RFC1001 len */ + | |
2776 | le16_to_cpu(rsp->OutputBufferOffset) + (char *)&rsp->hdr); | |
2777 | rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset), | |
2778 | le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr, | |
2779 | sizeof(struct smb2_fs_full_size_info)); | |
2780 | if (!rc) | |
2781 | copy_fs_info_to_kstatfs(info, fsdata); | |
2782 | ||
34f62640 SF |
2783 | qfsinf_exit: |
2784 | free_rsp_buf(resp_buftype, iov.iov_base); | |
2785 | return rc; | |
2786 | } | |
2787 | ||
2788 | int | |
2789 | SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon, | |
2167114c | 2790 | u64 persistent_fid, u64 volatile_fid, int level) |
34f62640 SF |
2791 | { |
2792 | struct smb2_query_info_rsp *rsp = NULL; | |
2793 | struct kvec iov; | |
2794 | int rc = 0; | |
2167114c | 2795 | int resp_buftype, max_len, min_len; |
34f62640 SF |
2796 | struct cifs_ses *ses = tcon->ses; |
2797 | unsigned int rsp_len, offset; | |
2798 | ||
2167114c SF |
2799 | if (level == FS_DEVICE_INFORMATION) { |
2800 | max_len = sizeof(FILE_SYSTEM_DEVICE_INFO); | |
2801 | min_len = sizeof(FILE_SYSTEM_DEVICE_INFO); | |
2802 | } else if (level == FS_ATTRIBUTE_INFORMATION) { | |
2803 | max_len = sizeof(FILE_SYSTEM_ATTRIBUTE_INFO); | |
2804 | min_len = MIN_FS_ATTR_INFO_SIZE; | |
af6a12ea SF |
2805 | } else if (level == FS_SECTOR_SIZE_INFORMATION) { |
2806 | max_len = sizeof(struct smb3_fs_ss_info); | |
2807 | min_len = sizeof(struct smb3_fs_ss_info); | |
2167114c | 2808 | } else { |
af6a12ea | 2809 | cifs_dbg(FYI, "Invalid qfsinfo level %d\n", level); |
2167114c SF |
2810 | return -EINVAL; |
2811 | } | |
2812 | ||
2813 | rc = build_qfs_info_req(&iov, tcon, level, max_len, | |
34f62640 SF |
2814 | persistent_fid, volatile_fid); |
2815 | if (rc) | |
2816 | return rc; | |
2817 | ||
2818 | rc = SendReceive2(xid, ses, &iov, 1, &resp_buftype, 0); | |
2819 | if (rc) { | |
2820 | cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE); | |
2821 | goto qfsattr_exit; | |
2822 | } | |
2823 | rsp = (struct smb2_query_info_rsp *)iov.iov_base; | |
2824 | ||
2825 | rsp_len = le32_to_cpu(rsp->OutputBufferLength); | |
2826 | offset = le16_to_cpu(rsp->OutputBufferOffset); | |
2167114c SF |
2827 | rc = validate_buf(offset, rsp_len, &rsp->hdr, min_len); |
2828 | if (rc) | |
2829 | goto qfsattr_exit; | |
2830 | ||
2831 | if (level == FS_ATTRIBUTE_INFORMATION) | |
34f62640 SF |
2832 | memcpy(&tcon->fsAttrInfo, 4 /* RFC1001 len */ + offset |
2833 | + (char *)&rsp->hdr, min_t(unsigned int, | |
2167114c SF |
2834 | rsp_len, max_len)); |
2835 | else if (level == FS_DEVICE_INFORMATION) | |
2836 | memcpy(&tcon->fsDevInfo, 4 /* RFC1001 len */ + offset | |
2837 | + (char *)&rsp->hdr, sizeof(FILE_SYSTEM_DEVICE_INFO)); | |
af6a12ea SF |
2838 | else if (level == FS_SECTOR_SIZE_INFORMATION) { |
2839 | struct smb3_fs_ss_info *ss_info = (struct smb3_fs_ss_info *) | |
2840 | (4 /* RFC1001 len */ + offset + (char *)&rsp->hdr); | |
2841 | tcon->ss_flags = le32_to_cpu(ss_info->Flags); | |
2842 | tcon->perf_sector_size = | |
2843 | le32_to_cpu(ss_info->PhysicalBytesPerSectorForPerf); | |
2844 | } | |
34f62640 SF |
2845 | |
2846 | qfsattr_exit: | |
6fc05c25 PS |
2847 | free_rsp_buf(resp_buftype, iov.iov_base); |
2848 | return rc; | |
2849 | } | |
f7ba7fe6 PS |
2850 | |
2851 | int | |
2852 | smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon, | |
2853 | const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid, | |
2854 | const __u32 num_lock, struct smb2_lock_element *buf) | |
2855 | { | |
2856 | int rc = 0; | |
2857 | struct smb2_lock_req *req = NULL; | |
2858 | struct kvec iov[2]; | |
2859 | int resp_buf_type; | |
2860 | unsigned int count; | |
2861 | ||
f96637be | 2862 | cifs_dbg(FYI, "smb2_lockv num lock %d\n", num_lock); |
f7ba7fe6 PS |
2863 | |
2864 | rc = small_smb2_init(SMB2_LOCK, tcon, (void **) &req); | |
2865 | if (rc) | |
2866 | return rc; | |
2867 | ||
2868 | req->hdr.ProcessId = cpu_to_le32(pid); | |
2869 | req->LockCount = cpu_to_le16(num_lock); | |
2870 | ||
2871 | req->PersistentFileId = persist_fid; | |
2872 | req->VolatileFileId = volatile_fid; | |
2873 | ||
2874 | count = num_lock * sizeof(struct smb2_lock_element); | |
2875 | inc_rfc1001_len(req, count - sizeof(struct smb2_lock_element)); | |
2876 | ||
2877 | iov[0].iov_base = (char *)req; | |
2878 | /* 4 for rfc1002 length field and count for all locks */ | |
2879 | iov[0].iov_len = get_rfc1002_length(req) + 4 - count; | |
2880 | iov[1].iov_base = (char *)buf; | |
2881 | iov[1].iov_len = count; | |
2882 | ||
2883 | cifs_stats_inc(&tcon->stats.cifs_stats.num_locks); | |
2884 | rc = SendReceive2(xid, tcon->ses, iov, 2, &resp_buf_type, CIFS_NO_RESP); | |
2885 | if (rc) { | |
f96637be | 2886 | cifs_dbg(FYI, "Send error in smb2_lockv = %d\n", rc); |
f7ba7fe6 PS |
2887 | cifs_stats_fail_inc(tcon, SMB2_LOCK_HE); |
2888 | } | |
2889 | ||
2890 | return rc; | |
2891 | } | |
2892 | ||
2893 | int | |
2894 | SMB2_lock(const unsigned int xid, struct cifs_tcon *tcon, | |
2895 | const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid, | |
2896 | const __u64 length, const __u64 offset, const __u32 lock_flags, | |
2897 | const bool wait) | |
2898 | { | |
2899 | struct smb2_lock_element lock; | |
2900 | ||
2901 | lock.Offset = cpu_to_le64(offset); | |
2902 | lock.Length = cpu_to_le64(length); | |
2903 | lock.Flags = cpu_to_le32(lock_flags); | |
2904 | if (!wait && lock_flags != SMB2_LOCKFLAG_UNLOCK) | |
2905 | lock.Flags |= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY); | |
2906 | ||
2907 | return smb2_lockv(xid, tcon, persist_fid, volatile_fid, pid, 1, &lock); | |
2908 | } | |
0822f514 PS |
2909 | |
2910 | int | |
2911 | SMB2_lease_break(const unsigned int xid, struct cifs_tcon *tcon, | |
2912 | __u8 *lease_key, const __le32 lease_state) | |
2913 | { | |
2914 | int rc; | |
2915 | struct smb2_lease_ack *req = NULL; | |
2916 | ||
f96637be | 2917 | cifs_dbg(FYI, "SMB2_lease_break\n"); |
0822f514 PS |
2918 | rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req); |
2919 | ||
2920 | if (rc) | |
2921 | return rc; | |
2922 | ||
2923 | req->hdr.CreditRequest = cpu_to_le16(1); | |
2924 | req->StructureSize = cpu_to_le16(36); | |
2925 | inc_rfc1001_len(req, 12); | |
2926 | ||
2927 | memcpy(req->LeaseKey, lease_key, 16); | |
2928 | req->LeaseState = lease_state; | |
2929 | ||
2930 | rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, CIFS_OBREAK_OP); | |
2931 | /* SMB2 buffer freed by function above */ | |
2932 | ||
2933 | if (rc) { | |
2934 | cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE); | |
f96637be | 2935 | cifs_dbg(FYI, "Send error in Lease Break = %d\n", rc); |
0822f514 PS |
2936 | } |
2937 | ||
2938 | return rc; | |
2939 | } |