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