Commit | Line | Data |
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ec2e4523 PS |
1 | /* |
2 | * fs/cifs/smb2pdu.c | |
3 | * | |
2b80d049 | 4 | * Copyright (C) International Business Machines Corp., 2009, 2013 |
ec2e4523 PS |
5 | * Etersoft, 2012 |
6 | * Author(s): Steve French (sfrench@us.ibm.com) | |
7 | * Pavel Shilovsky (pshilovsky@samba.org) 2012 | |
8 | * | |
9 | * Contains the routines for constructing the SMB2 PDUs themselves | |
10 | * | |
11 | * This library is free software; you can redistribute it and/or modify | |
12 | * it under the terms of the GNU Lesser General Public License as published | |
13 | * by the Free Software Foundation; either version 2.1 of the License, or | |
14 | * (at your option) any later version. | |
15 | * | |
16 | * This library is distributed in the hope that it will be useful, | |
17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See | |
19 | * the GNU Lesser General Public License for more details. | |
20 | * | |
21 | * You should have received a copy of the GNU Lesser General Public License | |
22 | * along with this library; if not, write to the Free Software | |
23 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
24 | */ | |
25 | ||
26 | /* SMB2 PDU handling routines here - except for leftovers (eg session setup) */ | |
27 | /* Note that there are handle based routines which must be */ | |
28 | /* treated slightly differently for reconnection purposes since we never */ | |
29 | /* want to reuse a stale file handle and only the caller knows the file info */ | |
30 | ||
31 | #include <linux/fs.h> | |
32 | #include <linux/kernel.h> | |
33 | #include <linux/vfs.h> | |
09a4707e | 34 | #include <linux/task_io_accounting_ops.h> |
ec2e4523 | 35 | #include <linux/uaccess.h> |
33319141 | 36 | #include <linux/pagemap.h> |
ec2e4523 PS |
37 | #include <linux/xattr.h> |
38 | #include "smb2pdu.h" | |
39 | #include "cifsglob.h" | |
40 | #include "cifsacl.h" | |
41 | #include "cifsproto.h" | |
42 | #include "smb2proto.h" | |
43 | #include "cifs_unicode.h" | |
44 | #include "cifs_debug.h" | |
45 | #include "ntlmssp.h" | |
46 | #include "smb2status.h" | |
09a4707e | 47 | #include "smb2glob.h" |
d324f08d | 48 | #include "cifspdu.h" |
ec2e4523 PS |
49 | |
50 | /* | |
51 | * The following table defines the expected "StructureSize" of SMB2 requests | |
52 | * in order by SMB2 command. This is similar to "wct" in SMB/CIFS requests. | |
53 | * | |
54 | * Note that commands are defined in smb2pdu.h in le16 but the array below is | |
55 | * indexed by command in host byte order. | |
56 | */ | |
57 | static const int smb2_req_struct_sizes[NUMBER_OF_SMB2_COMMANDS] = { | |
58 | /* SMB2_NEGOTIATE */ 36, | |
59 | /* SMB2_SESSION_SETUP */ 25, | |
60 | /* SMB2_LOGOFF */ 4, | |
61 | /* SMB2_TREE_CONNECT */ 9, | |
62 | /* SMB2_TREE_DISCONNECT */ 4, | |
63 | /* SMB2_CREATE */ 57, | |
64 | /* SMB2_CLOSE */ 24, | |
65 | /* SMB2_FLUSH */ 24, | |
66 | /* SMB2_READ */ 49, | |
67 | /* SMB2_WRITE */ 49, | |
68 | /* SMB2_LOCK */ 48, | |
69 | /* SMB2_IOCTL */ 57, | |
70 | /* SMB2_CANCEL */ 4, | |
71 | /* SMB2_ECHO */ 4, | |
72 | /* SMB2_QUERY_DIRECTORY */ 33, | |
73 | /* SMB2_CHANGE_NOTIFY */ 32, | |
74 | /* SMB2_QUERY_INFO */ 41, | |
75 | /* SMB2_SET_INFO */ 33, | |
76 | /* SMB2_OPLOCK_BREAK */ 24 /* BB this is 36 for LEASE_BREAK variant */ | |
77 | }; | |
78 | ||
79 | ||
80 | static void | |
81 | smb2_hdr_assemble(struct smb2_hdr *hdr, __le16 smb2_cmd /* command */ , | |
82 | const struct cifs_tcon *tcon) | |
83 | { | |
84 | struct smb2_pdu *pdu = (struct smb2_pdu *)hdr; | |
85 | char *temp = (char *)hdr; | |
86 | /* lookup word count ie StructureSize from table */ | |
87 | __u16 parmsize = smb2_req_struct_sizes[le16_to_cpu(smb2_cmd)]; | |
88 | ||
89 | /* | |
90 | * smaller than SMALL_BUFFER_SIZE but bigger than fixed area of | |
91 | * largest operations (Create) | |
92 | */ | |
93 | memset(temp, 0, 256); | |
94 | ||
95 | /* Note this is only network field converted to big endian */ | |
96 | hdr->smb2_buf_length = cpu_to_be32(parmsize + sizeof(struct smb2_hdr) | |
97 | - 4 /* RFC 1001 length field itself not counted */); | |
98 | ||
99 | hdr->ProtocolId[0] = 0xFE; | |
100 | hdr->ProtocolId[1] = 'S'; | |
101 | hdr->ProtocolId[2] = 'M'; | |
102 | hdr->ProtocolId[3] = 'B'; | |
103 | hdr->StructureSize = cpu_to_le16(64); | |
104 | hdr->Command = smb2_cmd; | |
105 | hdr->CreditRequest = cpu_to_le16(2); /* BB make this dynamic */ | |
106 | hdr->ProcessId = cpu_to_le32((__u16)current->tgid); | |
107 | ||
108 | if (!tcon) | |
109 | goto out; | |
110 | ||
2b80d049 SF |
111 | /* BB FIXME when we do write > 64K add +1 for every 64K in req or rsp */ |
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 */ | |
84ceeb96 SF |
114 | if ((tcon->ses) && |
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); | |
248 | /* | |
249 | * BB FIXME add code to check if wsize needs update due to negotiated | |
250 | * smb buffer size shrinking. | |
251 | */ | |
252 | out: | |
253 | /* | |
254 | * Check if handle based operation so we know whether we can continue | |
255 | * or not without returning to caller to reset file handle. | |
256 | */ | |
257 | /* | |
258 | * BB Is flush done by server on drop of tcp session? Should we special | |
259 | * case it and skip above? | |
260 | */ | |
261 | switch (smb2_command) { | |
262 | case SMB2_FLUSH: | |
263 | case SMB2_READ: | |
264 | case SMB2_WRITE: | |
265 | case SMB2_LOCK: | |
266 | case SMB2_IOCTL: | |
267 | case SMB2_QUERY_DIRECTORY: | |
268 | case SMB2_CHANGE_NOTIFY: | |
269 | case SMB2_QUERY_INFO: | |
270 | case SMB2_SET_INFO: | |
271 | return -EAGAIN; | |
272 | } | |
273 | unload_nls(nls_codepage); | |
ec2e4523 PS |
274 | return rc; |
275 | } | |
276 | ||
277 | /* | |
278 | * Allocate and return pointer to an SMB request hdr, and set basic | |
279 | * SMB information in the SMB header. If the return code is zero, this | |
280 | * function must have filled in request_buf pointer. | |
281 | */ | |
282 | static int | |
283 | small_smb2_init(__le16 smb2_command, struct cifs_tcon *tcon, | |
284 | void **request_buf) | |
285 | { | |
286 | int rc = 0; | |
287 | ||
288 | rc = smb2_reconnect(smb2_command, tcon); | |
289 | if (rc) | |
290 | return rc; | |
291 | ||
292 | /* BB eventually switch this to SMB2 specific small buf size */ | |
293 | *request_buf = cifs_small_buf_get(); | |
294 | if (*request_buf == NULL) { | |
295 | /* BB should we add a retry in here if not a writepage? */ | |
296 | return -ENOMEM; | |
297 | } | |
298 | ||
299 | smb2_hdr_assemble((struct smb2_hdr *) *request_buf, smb2_command, tcon); | |
300 | ||
301 | if (tcon != NULL) { | |
302 | #ifdef CONFIG_CIFS_STATS2 | |
ec2e4523 PS |
303 | uint16_t com_code = le16_to_cpu(smb2_command); |
304 | cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_sent[com_code]); | |
ec2e4523 PS |
305 | #endif |
306 | cifs_stats_inc(&tcon->num_smbs_sent); | |
307 | } | |
308 | ||
309 | return rc; | |
310 | } | |
311 | ||
312 | static void | |
313 | free_rsp_buf(int resp_buftype, void *rsp) | |
314 | { | |
315 | if (resp_buftype == CIFS_SMALL_BUFFER) | |
316 | cifs_small_buf_release(rsp); | |
317 | else if (resp_buftype == CIFS_LARGE_BUFFER) | |
318 | cifs_buf_release(rsp); | |
319 | } | |
320 | ||
ec2e4523 PS |
321 | |
322 | /* | |
323 | * | |
324 | * SMB2 Worker functions follow: | |
325 | * | |
326 | * The general structure of the worker functions is: | |
327 | * 1) Call smb2_init (assembles SMB2 header) | |
328 | * 2) Initialize SMB2 command specific fields in fixed length area of SMB | |
329 | * 3) Call smb_sendrcv2 (sends request on socket and waits for response) | |
330 | * 4) Decode SMB2 command specific fields in the fixed length area | |
331 | * 5) Decode variable length data area (if any for this SMB2 command type) | |
332 | * 6) Call free smb buffer | |
333 | * 7) return | |
334 | * | |
335 | */ | |
336 | ||
337 | int | |
338 | SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses) | |
339 | { | |
340 | struct smb2_negotiate_req *req; | |
341 | struct smb2_negotiate_rsp *rsp; | |
342 | struct kvec iov[1]; | |
343 | int rc = 0; | |
344 | int resp_buftype; | |
3534b850 | 345 | struct TCP_Server_Info *server = ses->server; |
ec2e4523 PS |
346 | int blob_offset, blob_length; |
347 | char *security_blob; | |
348 | int flags = CIFS_NEG_OP; | |
349 | ||
f96637be | 350 | cifs_dbg(FYI, "Negotiate protocol\n"); |
ec2e4523 | 351 | |
3534b850 JL |
352 | if (!server) { |
353 | WARN(1, "%s: server is NULL!\n", __func__); | |
354 | return -EIO; | |
ec2e4523 PS |
355 | } |
356 | ||
357 | rc = small_smb2_init(SMB2_NEGOTIATE, NULL, (void **) &req); | |
358 | if (rc) | |
359 | return rc; | |
360 | ||
ec2e4523 PS |
361 | req->hdr.SessionId = 0; |
362 | ||
e4aa25e7 | 363 | req->Dialects[0] = cpu_to_le16(ses->server->vals->protocol_id); |
ec2e4523 | 364 | |
e4aa25e7 SF |
365 | req->DialectCount = cpu_to_le16(1); /* One vers= at a time for now */ |
366 | inc_rfc1001_len(req, 2); | |
ec2e4523 PS |
367 | |
368 | /* only one of SMB2 signing flags may be set in SMB2 request */ | |
38d77c50 | 369 | if (ses->sign) |
9cd2e62c | 370 | req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED); |
38d77c50 | 371 | else if (global_secflags & CIFSSEC_MAY_SIGN) |
9cd2e62c | 372 | req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED); |
38d77c50 JL |
373 | else |
374 | req->SecurityMode = 0; | |
ec2e4523 | 375 | |
e4aa25e7 | 376 | req->Capabilities = cpu_to_le32(ses->server->vals->req_capabilities); |
ec2e4523 | 377 | |
b8c32dbb PS |
378 | memcpy(req->ClientGUID, cifs_client_guid, SMB2_CLIENT_GUID_SIZE); |
379 | ||
ec2e4523 PS |
380 | iov[0].iov_base = (char *)req; |
381 | /* 4 for rfc1002 length field */ | |
382 | iov[0].iov_len = get_rfc1002_length(req) + 4; | |
383 | ||
384 | rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, flags); | |
385 | ||
386 | rsp = (struct smb2_negotiate_rsp *)iov[0].iov_base; | |
387 | /* | |
388 | * No tcon so can't do | |
389 | * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]); | |
390 | */ | |
391 | if (rc != 0) | |
392 | goto neg_exit; | |
393 | ||
f96637be | 394 | cifs_dbg(FYI, "mode 0x%x\n", rsp->SecurityMode); |
ec2e4523 | 395 | |
e4aa25e7 SF |
396 | /* BB we may eventually want to match the negotiated vs. requested |
397 | dialect, even though we are only requesting one at a time */ | |
398 | if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) | |
f96637be | 399 | cifs_dbg(FYI, "negotiated smb2.0 dialect\n"); |
e4aa25e7 | 400 | else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) |
f96637be | 401 | cifs_dbg(FYI, "negotiated smb2.1 dialect\n"); |
e4aa25e7 | 402 | else if (rsp->DialectRevision == cpu_to_le16(SMB30_PROT_ID)) |
f96637be | 403 | cifs_dbg(FYI, "negotiated smb3.0 dialect\n"); |
20b6d8b4 SF |
404 | else if (rsp->DialectRevision == cpu_to_le16(SMB302_PROT_ID)) |
405 | cifs_dbg(FYI, "negotiated smb3.02 dialect\n"); | |
ec2e4523 | 406 | else { |
f96637be JP |
407 | cifs_dbg(VFS, "Illegal dialect returned by server %d\n", |
408 | le16_to_cpu(rsp->DialectRevision)); | |
ec2e4523 PS |
409 | rc = -EIO; |
410 | goto neg_exit; | |
411 | } | |
412 | server->dialect = le16_to_cpu(rsp->DialectRevision); | |
413 | ||
e598d1d8 JL |
414 | /* SMB2 only has an extended negflavor */ |
415 | server->negflavor = CIFS_NEGFLAVOR_EXTENDED; | |
ec2e4523 PS |
416 | server->maxBuf = le32_to_cpu(rsp->MaxTransactSize); |
417 | server->max_read = le32_to_cpu(rsp->MaxReadSize); | |
418 | server->max_write = le32_to_cpu(rsp->MaxWriteSize); | |
419 | /* BB Do we need to validate the SecurityMode? */ | |
420 | server->sec_mode = le16_to_cpu(rsp->SecurityMode); | |
421 | server->capabilities = le32_to_cpu(rsp->Capabilities); | |
29e20f9c PS |
422 | /* Internal types */ |
423 | server->capabilities |= SMB2_NT_FIND | SMB2_LARGE_FILES; | |
ec2e4523 PS |
424 | |
425 | security_blob = smb2_get_data_area_len(&blob_offset, &blob_length, | |
426 | &rsp->hdr); | |
5d875cc9 SF |
427 | /* |
428 | * See MS-SMB2 section 2.2.4: if no blob, client picks default which | |
429 | * for us will be | |
430 | * ses->sectype = RawNTLMSSP; | |
431 | * but for time being this is our only auth choice so doesn't matter. | |
432 | * We just found a server which sets blob length to zero expecting raw. | |
433 | */ | |
434 | if (blob_length == 0) | |
435 | cifs_dbg(FYI, "missing security blob on negprot\n"); | |
3c1bf7e4 | 436 | |
38d77c50 | 437 | rc = cifs_enable_signing(server, ses->sign); |
ec2e4523 | 438 | #ifdef CONFIG_SMB2_ASN1 /* BB REMOVEME when updated asn1.c ready */ |
9ddec561 JL |
439 | if (rc) |
440 | goto neg_exit; | |
5d875cc9 SF |
441 | if (blob_length) |
442 | rc = decode_neg_token_init(security_blob, blob_length, | |
ec2e4523 PS |
443 | &server->sec_type); |
444 | if (rc == 1) | |
445 | rc = 0; | |
446 | else if (rc == 0) { | |
447 | rc = -EIO; | |
448 | goto neg_exit; | |
449 | } | |
450 | #endif | |
451 | ||
452 | neg_exit: | |
453 | free_rsp_buf(resp_buftype, rsp); | |
454 | return rc; | |
455 | } | |
5478f9ba PS |
456 | |
457 | int | |
458 | SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses, | |
459 | const struct nls_table *nls_cp) | |
460 | { | |
461 | struct smb2_sess_setup_req *req; | |
462 | struct smb2_sess_setup_rsp *rsp = NULL; | |
463 | struct kvec iov[2]; | |
464 | int rc = 0; | |
465 | int resp_buftype; | |
466 | __le32 phase = NtLmNegotiate; /* NTLMSSP, if needed, is multistage */ | |
3534b850 | 467 | struct TCP_Server_Info *server = ses->server; |
5478f9ba PS |
468 | u16 blob_length = 0; |
469 | char *security_blob; | |
470 | char *ntlmssp_blob = NULL; | |
471 | bool use_spnego = false; /* else use raw ntlmssp */ | |
472 | ||
f96637be | 473 | cifs_dbg(FYI, "Session Setup\n"); |
5478f9ba | 474 | |
3534b850 JL |
475 | if (!server) { |
476 | WARN(1, "%s: server is NULL!\n", __func__); | |
477 | return -EIO; | |
5478f9ba PS |
478 | } |
479 | ||
d4e63bd6 SP |
480 | /* |
481 | * If we are here due to reconnect, free per-smb session key | |
482 | * in case signing was required. | |
483 | */ | |
484 | kfree(ses->auth_key.response); | |
485 | ses->auth_key.response = NULL; | |
486 | ||
5478f9ba PS |
487 | /* |
488 | * If memory allocation is successful, caller of this function | |
489 | * frees it. | |
490 | */ | |
491 | ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL); | |
492 | if (!ses->ntlmssp) | |
493 | return -ENOMEM; | |
5c234aa5 | 494 | ses->ntlmssp->sesskey_per_smbsess = true; |
5478f9ba | 495 | |
3f618223 JL |
496 | /* FIXME: allow for other auth types besides NTLMSSP (e.g. krb5) */ |
497 | ses->sectype = RawNTLMSSP; | |
5478f9ba PS |
498 | |
499 | ssetup_ntlmssp_authenticate: | |
500 | if (phase == NtLmChallenge) | |
501 | phase = NtLmAuthenticate; /* if ntlmssp, now final phase */ | |
502 | ||
503 | rc = small_smb2_init(SMB2_SESSION_SETUP, NULL, (void **) &req); | |
504 | if (rc) | |
505 | return rc; | |
506 | ||
5478f9ba PS |
507 | req->hdr.SessionId = 0; /* First session, not a reauthenticate */ |
508 | req->VcNumber = 0; /* MBZ */ | |
509 | /* to enable echos and oplocks */ | |
510 | req->hdr.CreditRequest = cpu_to_le16(3); | |
511 | ||
512 | /* only one of SMB2 signing flags may be set in SMB2 request */ | |
38d77c50 JL |
513 | if (server->sign) |
514 | req->SecurityMode = SMB2_NEGOTIATE_SIGNING_REQUIRED; | |
515 | else if (global_secflags & CIFSSEC_MAY_SIGN) /* one flag unlike MUST_ */ | |
516 | req->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED; | |
517 | else | |
518 | req->SecurityMode = 0; | |
519 | ||
5478f9ba PS |
520 | req->Capabilities = 0; |
521 | req->Channel = 0; /* MBZ */ | |
522 | ||
523 | iov[0].iov_base = (char *)req; | |
524 | /* 4 for rfc1002 length field and 1 for pad */ | |
525 | iov[0].iov_len = get_rfc1002_length(req) + 4 - 1; | |
526 | if (phase == NtLmNegotiate) { | |
527 | ntlmssp_blob = kmalloc(sizeof(struct _NEGOTIATE_MESSAGE), | |
528 | GFP_KERNEL); | |
529 | if (ntlmssp_blob == NULL) { | |
530 | rc = -ENOMEM; | |
531 | goto ssetup_exit; | |
532 | } | |
533 | build_ntlmssp_negotiate_blob(ntlmssp_blob, ses); | |
534 | if (use_spnego) { | |
535 | /* blob_length = build_spnego_ntlmssp_blob( | |
536 | &security_blob, | |
537 | sizeof(struct _NEGOTIATE_MESSAGE), | |
538 | ntlmssp_blob); */ | |
539 | /* BB eventually need to add this */ | |
f96637be | 540 | cifs_dbg(VFS, "spnego not supported for SMB2 yet\n"); |
5478f9ba PS |
541 | rc = -EOPNOTSUPP; |
542 | kfree(ntlmssp_blob); | |
543 | goto ssetup_exit; | |
544 | } else { | |
545 | blob_length = sizeof(struct _NEGOTIATE_MESSAGE); | |
546 | /* with raw NTLMSSP we don't encapsulate in SPNEGO */ | |
547 | security_blob = ntlmssp_blob; | |
548 | } | |
549 | } else if (phase == NtLmAuthenticate) { | |
550 | req->hdr.SessionId = ses->Suid; | |
551 | ntlmssp_blob = kzalloc(sizeof(struct _NEGOTIATE_MESSAGE) + 500, | |
552 | GFP_KERNEL); | |
553 | if (ntlmssp_blob == NULL) { | |
5478f9ba PS |
554 | rc = -ENOMEM; |
555 | goto ssetup_exit; | |
556 | } | |
557 | rc = build_ntlmssp_auth_blob(ntlmssp_blob, &blob_length, ses, | |
558 | nls_cp); | |
559 | if (rc) { | |
f96637be JP |
560 | cifs_dbg(FYI, "build_ntlmssp_auth_blob failed %d\n", |
561 | rc); | |
5478f9ba PS |
562 | goto ssetup_exit; /* BB double check error handling */ |
563 | } | |
564 | if (use_spnego) { | |
565 | /* blob_length = build_spnego_ntlmssp_blob( | |
566 | &security_blob, | |
567 | blob_length, | |
568 | ntlmssp_blob); */ | |
f96637be | 569 | cifs_dbg(VFS, "spnego not supported for SMB2 yet\n"); |
5478f9ba PS |
570 | rc = -EOPNOTSUPP; |
571 | kfree(ntlmssp_blob); | |
572 | goto ssetup_exit; | |
573 | } else { | |
574 | security_blob = ntlmssp_blob; | |
575 | } | |
576 | } else { | |
f96637be | 577 | cifs_dbg(VFS, "illegal ntlmssp phase\n"); |
5478f9ba PS |
578 | rc = -EIO; |
579 | goto ssetup_exit; | |
580 | } | |
581 | ||
582 | /* Testing shows that buffer offset must be at location of Buffer[0] */ | |
583 | req->SecurityBufferOffset = | |
584 | cpu_to_le16(sizeof(struct smb2_sess_setup_req) - | |
585 | 1 /* pad */ - 4 /* rfc1001 len */); | |
586 | req->SecurityBufferLength = cpu_to_le16(blob_length); | |
587 | iov[1].iov_base = security_blob; | |
588 | iov[1].iov_len = blob_length; | |
589 | ||
590 | inc_rfc1001_len(req, blob_length - 1 /* pad */); | |
591 | ||
592 | /* BB add code to build os and lm fields */ | |
593 | ||
6d8b59d7 SF |
594 | rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, |
595 | CIFS_LOG_ERROR | CIFS_NEG_OP); | |
5478f9ba PS |
596 | |
597 | kfree(security_blob); | |
598 | rsp = (struct smb2_sess_setup_rsp *)iov[0].iov_base; | |
4ca3a99c PS |
599 | if (resp_buftype != CIFS_NO_BUFFER && |
600 | rsp->hdr.Status == STATUS_MORE_PROCESSING_REQUIRED) { | |
5478f9ba | 601 | if (phase != NtLmNegotiate) { |
f96637be | 602 | cifs_dbg(VFS, "Unexpected more processing error\n"); |
5478f9ba PS |
603 | goto ssetup_exit; |
604 | } | |
605 | if (offsetof(struct smb2_sess_setup_rsp, Buffer) - 4 != | |
4ca3a99c | 606 | le16_to_cpu(rsp->SecurityBufferOffset)) { |
f96637be JP |
607 | cifs_dbg(VFS, "Invalid security buffer offset %d\n", |
608 | le16_to_cpu(rsp->SecurityBufferOffset)); | |
5478f9ba PS |
609 | rc = -EIO; |
610 | goto ssetup_exit; | |
611 | } | |
612 | ||
613 | /* NTLMSSP Negotiate sent now processing challenge (response) */ | |
614 | phase = NtLmChallenge; /* process ntlmssp challenge */ | |
615 | rc = 0; /* MORE_PROCESSING is not an error here but expected */ | |
616 | ses->Suid = rsp->hdr.SessionId; | |
617 | rc = decode_ntlmssp_challenge(rsp->Buffer, | |
618 | le16_to_cpu(rsp->SecurityBufferLength), ses); | |
619 | } | |
620 | ||
621 | /* | |
622 | * BB eventually add code for SPNEGO decoding of NtlmChallenge blob, | |
623 | * but at least the raw NTLMSSP case works. | |
624 | */ | |
625 | /* | |
626 | * No tcon so can't do | |
627 | * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]); | |
628 | */ | |
629 | if (rc != 0) | |
630 | goto ssetup_exit; | |
631 | ||
5478f9ba PS |
632 | ses->session_flags = le16_to_cpu(rsp->SessionFlags); |
633 | ssetup_exit: | |
634 | free_rsp_buf(resp_buftype, rsp); | |
635 | ||
636 | /* if ntlmssp, and negotiate succeeded, proceed to authenticate phase */ | |
637 | if ((phase == NtLmChallenge) && (rc == 0)) | |
638 | goto ssetup_ntlmssp_authenticate; | |
d4e63bd6 SP |
639 | |
640 | if (!rc) { | |
641 | mutex_lock(&server->srv_mutex); | |
32811d24 SP |
642 | if (server->sign && server->ops->generate_signingkey) { |
643 | rc = server->ops->generate_signingkey(ses); | |
644 | kfree(ses->auth_key.response); | |
645 | ses->auth_key.response = NULL; | |
646 | if (rc) { | |
647 | cifs_dbg(FYI, | |
648 | "SMB3 session key generation failed\n"); | |
649 | mutex_unlock(&server->srv_mutex); | |
650 | goto keygen_exit; | |
651 | } | |
652 | } | |
d4e63bd6 SP |
653 | if (!server->session_estab) { |
654 | server->sequence_number = 0x2; | |
655 | server->session_estab = true; | |
d4e63bd6 SP |
656 | } |
657 | mutex_unlock(&server->srv_mutex); | |
658 | ||
659 | cifs_dbg(FYI, "SMB2/3 session established successfully\n"); | |
660 | spin_lock(&GlobalMid_Lock); | |
661 | ses->status = CifsGood; | |
662 | ses->need_reconnect = false; | |
663 | spin_unlock(&GlobalMid_Lock); | |
664 | } | |
665 | ||
32811d24 | 666 | keygen_exit: |
d4e63bd6 SP |
667 | if (!server->sign) { |
668 | kfree(ses->auth_key.response); | |
669 | ses->auth_key.response = NULL; | |
670 | } | |
671 | kfree(ses->ntlmssp); | |
672 | ||
5478f9ba PS |
673 | return rc; |
674 | } | |
675 | ||
676 | int | |
677 | SMB2_logoff(const unsigned int xid, struct cifs_ses *ses) | |
678 | { | |
679 | struct smb2_logoff_req *req; /* response is also trivial struct */ | |
680 | int rc = 0; | |
681 | struct TCP_Server_Info *server; | |
682 | ||
f96637be | 683 | cifs_dbg(FYI, "disconnect session %p\n", ses); |
5478f9ba PS |
684 | |
685 | if (ses && (ses->server)) | |
686 | server = ses->server; | |
687 | else | |
688 | return -EIO; | |
689 | ||
eb4c7df6 SP |
690 | /* no need to send SMB logoff if uid already closed due to reconnect */ |
691 | if (ses->need_reconnect) | |
692 | goto smb2_session_already_dead; | |
693 | ||
5478f9ba PS |
694 | rc = small_smb2_init(SMB2_LOGOFF, NULL, (void **) &req); |
695 | if (rc) | |
696 | return rc; | |
697 | ||
698 | /* since no tcon, smb2_init can not do this, so do here */ | |
699 | req->hdr.SessionId = ses->Suid; | |
38d77c50 | 700 | if (server->sign) |
3c1bf7e4 | 701 | req->hdr.Flags |= SMB2_FLAGS_SIGNED; |
5478f9ba PS |
702 | |
703 | rc = SendReceiveNoRsp(xid, ses, (char *) &req->hdr, 0); | |
704 | /* | |
705 | * No tcon so can't do | |
706 | * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]); | |
707 | */ | |
eb4c7df6 SP |
708 | |
709 | smb2_session_already_dead: | |
5478f9ba PS |
710 | return rc; |
711 | } | |
faaf946a PS |
712 | |
713 | static inline void cifs_stats_fail_inc(struct cifs_tcon *tcon, uint16_t code) | |
714 | { | |
d60622eb | 715 | cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_failed[code]); |
faaf946a PS |
716 | } |
717 | ||
718 | #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */) | |
719 | ||
720 | int | |
721 | SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree, | |
722 | struct cifs_tcon *tcon, const struct nls_table *cp) | |
723 | { | |
724 | struct smb2_tree_connect_req *req; | |
725 | struct smb2_tree_connect_rsp *rsp = NULL; | |
726 | struct kvec iov[2]; | |
727 | int rc = 0; | |
728 | int resp_buftype; | |
729 | int unc_path_len; | |
730 | struct TCP_Server_Info *server; | |
731 | __le16 *unc_path = NULL; | |
732 | ||
f96637be | 733 | cifs_dbg(FYI, "TCON\n"); |
faaf946a PS |
734 | |
735 | if ((ses->server) && tree) | |
736 | server = ses->server; | |
737 | else | |
738 | return -EIO; | |
739 | ||
740 | if (tcon && tcon->bad_network_name) | |
741 | return -ENOENT; | |
742 | ||
743 | unc_path = kmalloc(MAX_SHARENAME_LENGTH * 2, GFP_KERNEL); | |
744 | if (unc_path == NULL) | |
745 | return -ENOMEM; | |
746 | ||
747 | unc_path_len = cifs_strtoUTF16(unc_path, tree, strlen(tree), cp) + 1; | |
748 | unc_path_len *= 2; | |
749 | if (unc_path_len < 2) { | |
750 | kfree(unc_path); | |
751 | return -EINVAL; | |
752 | } | |
753 | ||
754 | rc = small_smb2_init(SMB2_TREE_CONNECT, tcon, (void **) &req); | |
755 | if (rc) { | |
756 | kfree(unc_path); | |
757 | return rc; | |
758 | } | |
759 | ||
760 | if (tcon == NULL) { | |
761 | /* since no tcon, smb2_init can not do this, so do here */ | |
762 | req->hdr.SessionId = ses->Suid; | |
763 | /* if (ses->server->sec_mode & SECMODE_SIGN_REQUIRED) | |
764 | req->hdr.Flags |= SMB2_FLAGS_SIGNED; */ | |
765 | } | |
766 | ||
767 | iov[0].iov_base = (char *)req; | |
768 | /* 4 for rfc1002 length field and 1 for pad */ | |
769 | iov[0].iov_len = get_rfc1002_length(req) + 4 - 1; | |
770 | ||
771 | /* Testing shows that buffer offset must be at location of Buffer[0] */ | |
772 | req->PathOffset = cpu_to_le16(sizeof(struct smb2_tree_connect_req) | |
773 | - 1 /* pad */ - 4 /* do not count rfc1001 len field */); | |
774 | req->PathLength = cpu_to_le16(unc_path_len - 2); | |
775 | iov[1].iov_base = unc_path; | |
776 | iov[1].iov_len = unc_path_len; | |
777 | ||
778 | inc_rfc1001_len(req, unc_path_len - 1 /* pad */); | |
779 | ||
780 | rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, 0); | |
781 | rsp = (struct smb2_tree_connect_rsp *)iov[0].iov_base; | |
782 | ||
783 | if (rc != 0) { | |
784 | if (tcon) { | |
785 | cifs_stats_fail_inc(tcon, SMB2_TREE_CONNECT_HE); | |
786 | tcon->need_reconnect = true; | |
787 | } | |
788 | goto tcon_error_exit; | |
789 | } | |
790 | ||
faaf946a PS |
791 | if (tcon == NULL) { |
792 | ses->ipc_tid = rsp->hdr.TreeId; | |
793 | goto tcon_exit; | |
794 | } | |
795 | ||
796 | if (rsp->ShareType & SMB2_SHARE_TYPE_DISK) | |
f96637be | 797 | cifs_dbg(FYI, "connection to disk share\n"); |
faaf946a PS |
798 | else if (rsp->ShareType & SMB2_SHARE_TYPE_PIPE) { |
799 | tcon->ipc = true; | |
f96637be | 800 | cifs_dbg(FYI, "connection to pipe share\n"); |
faaf946a PS |
801 | } else if (rsp->ShareType & SMB2_SHARE_TYPE_PRINT) { |
802 | tcon->print = true; | |
f96637be | 803 | cifs_dbg(FYI, "connection to printer\n"); |
faaf946a | 804 | } else { |
f96637be | 805 | cifs_dbg(VFS, "unknown share type %d\n", rsp->ShareType); |
faaf946a PS |
806 | rc = -EOPNOTSUPP; |
807 | goto tcon_error_exit; | |
808 | } | |
809 | ||
810 | tcon->share_flags = le32_to_cpu(rsp->ShareFlags); | |
769ee6a4 | 811 | tcon->capabilities = rsp->Capabilities; /* we keep caps little endian */ |
faaf946a PS |
812 | tcon->maximal_access = le32_to_cpu(rsp->MaximalAccess); |
813 | tcon->tidStatus = CifsGood; | |
814 | tcon->need_reconnect = false; | |
815 | tcon->tid = rsp->hdr.TreeId; | |
46b51d08 | 816 | strlcpy(tcon->treeName, tree, sizeof(tcon->treeName)); |
faaf946a PS |
817 | |
818 | if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) && | |
819 | ((tcon->share_flags & SHI1005_FLAGS_DFS) == 0)) | |
f96637be | 820 | cifs_dbg(VFS, "DFS capability contradicts DFS flag\n"); |
faaf946a PS |
821 | |
822 | tcon_exit: | |
823 | free_rsp_buf(resp_buftype, rsp); | |
824 | kfree(unc_path); | |
825 | return rc; | |
826 | ||
827 | tcon_error_exit: | |
828 | if (rsp->hdr.Status == STATUS_BAD_NETWORK_NAME) { | |
f96637be | 829 | cifs_dbg(VFS, "BAD_NETWORK_NAME: %s\n", tree); |
faaf946a PS |
830 | tcon->bad_network_name = true; |
831 | } | |
832 | goto tcon_exit; | |
833 | } | |
834 | ||
835 | int | |
836 | SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon) | |
837 | { | |
838 | struct smb2_tree_disconnect_req *req; /* response is trivial */ | |
839 | int rc = 0; | |
840 | struct TCP_Server_Info *server; | |
841 | struct cifs_ses *ses = tcon->ses; | |
842 | ||
f96637be | 843 | cifs_dbg(FYI, "Tree Disconnect\n"); |
faaf946a PS |
844 | |
845 | if (ses && (ses->server)) | |
846 | server = ses->server; | |
847 | else | |
848 | return -EIO; | |
849 | ||
850 | if ((tcon->need_reconnect) || (tcon->ses->need_reconnect)) | |
851 | return 0; | |
852 | ||
853 | rc = small_smb2_init(SMB2_TREE_DISCONNECT, tcon, (void **) &req); | |
854 | if (rc) | |
855 | return rc; | |
856 | ||
857 | rc = SendReceiveNoRsp(xid, ses, (char *)&req->hdr, 0); | |
858 | if (rc) | |
859 | cifs_stats_fail_inc(tcon, SMB2_TREE_DISCONNECT_HE); | |
860 | ||
861 | return rc; | |
862 | } | |
2503a0db | 863 | |
b8c32dbb | 864 | |
63eb3def PS |
865 | static struct create_durable * |
866 | create_durable_buf(void) | |
867 | { | |
868 | struct create_durable *buf; | |
869 | ||
870 | buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL); | |
871 | if (!buf) | |
872 | return NULL; | |
873 | ||
874 | buf->ccontext.DataOffset = cpu_to_le16(offsetof | |
9cbc0b73 | 875 | (struct create_durable, Data)); |
63eb3def PS |
876 | buf->ccontext.DataLength = cpu_to_le32(16); |
877 | buf->ccontext.NameOffset = cpu_to_le16(offsetof | |
878 | (struct create_durable, Name)); | |
879 | buf->ccontext.NameLength = cpu_to_le16(4); | |
880 | buf->Name[0] = 'D'; | |
881 | buf->Name[1] = 'H'; | |
882 | buf->Name[2] = 'n'; | |
883 | buf->Name[3] = 'Q'; | |
884 | return buf; | |
885 | } | |
886 | ||
9cbc0b73 PS |
887 | static struct create_durable * |
888 | create_reconnect_durable_buf(struct cifs_fid *fid) | |
889 | { | |
890 | struct create_durable *buf; | |
891 | ||
892 | buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL); | |
893 | if (!buf) | |
894 | return NULL; | |
895 | ||
896 | buf->ccontext.DataOffset = cpu_to_le16(offsetof | |
897 | (struct create_durable, Data)); | |
898 | buf->ccontext.DataLength = cpu_to_le32(16); | |
899 | buf->ccontext.NameOffset = cpu_to_le16(offsetof | |
900 | (struct create_durable, Name)); | |
901 | buf->ccontext.NameLength = cpu_to_le16(4); | |
902 | buf->Data.Fid.PersistentFileId = fid->persistent_fid; | |
903 | buf->Data.Fid.VolatileFileId = fid->volatile_fid; | |
904 | buf->Name[0] = 'D'; | |
905 | buf->Name[1] = 'H'; | |
906 | buf->Name[2] = 'n'; | |
907 | buf->Name[3] = 'C'; | |
908 | return buf; | |
909 | } | |
910 | ||
b8c32dbb | 911 | static __u8 |
42873b0a PS |
912 | parse_lease_state(struct TCP_Server_Info *server, struct smb2_create_rsp *rsp, |
913 | unsigned int *epoch) | |
b8c32dbb PS |
914 | { |
915 | char *data_offset; | |
b5c7cde3 | 916 | struct create_context *cc; |
fd554396 PS |
917 | unsigned int next = 0; |
918 | char *name; | |
b8c32dbb | 919 | |
fd554396 | 920 | data_offset = (char *)rsp + 4 + le32_to_cpu(rsp->CreateContextsOffset); |
b5c7cde3 | 921 | cc = (struct create_context *)data_offset; |
b8c32dbb | 922 | do { |
b5c7cde3 PS |
923 | cc = (struct create_context *)((char *)cc + next); |
924 | name = le16_to_cpu(cc->NameOffset) + (char *)cc; | |
925 | if (le16_to_cpu(cc->NameLength) != 4 || | |
b8c32dbb | 926 | strncmp(name, "RqLs", 4)) { |
b5c7cde3 | 927 | next = le32_to_cpu(cc->Next); |
b8c32dbb PS |
928 | continue; |
929 | } | |
42873b0a | 930 | return server->ops->parse_lease_buf(cc, epoch); |
fd554396 | 931 | } while (next != 0); |
b8c32dbb | 932 | |
b5c7cde3 | 933 | return 0; |
b8c32dbb PS |
934 | } |
935 | ||
d22cbfec | 936 | static int |
a41a28bd PS |
937 | add_lease_context(struct TCP_Server_Info *server, struct kvec *iov, |
938 | unsigned int *num_iovec, __u8 *oplock) | |
d22cbfec PS |
939 | { |
940 | struct smb2_create_req *req = iov[0].iov_base; | |
941 | unsigned int num = *num_iovec; | |
942 | ||
a41a28bd | 943 | iov[num].iov_base = server->ops->create_lease_buf(oplock+1, *oplock); |
d22cbfec PS |
944 | if (iov[num].iov_base == NULL) |
945 | return -ENOMEM; | |
a41a28bd | 946 | iov[num].iov_len = server->vals->create_lease_size; |
d22cbfec PS |
947 | req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_LEASE; |
948 | if (!req->CreateContextsOffset) | |
949 | req->CreateContextsOffset = cpu_to_le32( | |
950 | sizeof(struct smb2_create_req) - 4 + | |
951 | iov[num - 1].iov_len); | |
a41a28bd PS |
952 | le32_add_cpu(&req->CreateContextsLength, |
953 | server->vals->create_lease_size); | |
954 | inc_rfc1001_len(&req->hdr, server->vals->create_lease_size); | |
d22cbfec PS |
955 | *num_iovec = num + 1; |
956 | return 0; | |
957 | } | |
958 | ||
63eb3def | 959 | static int |
9cbc0b73 PS |
960 | add_durable_context(struct kvec *iov, unsigned int *num_iovec, |
961 | struct cifs_open_parms *oparms) | |
63eb3def PS |
962 | { |
963 | struct smb2_create_req *req = iov[0].iov_base; | |
964 | unsigned int num = *num_iovec; | |
965 | ||
9cbc0b73 PS |
966 | if (oparms->reconnect) { |
967 | iov[num].iov_base = create_reconnect_durable_buf(oparms->fid); | |
968 | /* indicate that we don't need to relock the file */ | |
969 | oparms->reconnect = false; | |
970 | } else | |
971 | iov[num].iov_base = create_durable_buf(); | |
63eb3def PS |
972 | if (iov[num].iov_base == NULL) |
973 | return -ENOMEM; | |
974 | iov[num].iov_len = sizeof(struct create_durable); | |
975 | if (!req->CreateContextsOffset) | |
976 | req->CreateContextsOffset = | |
977 | cpu_to_le32(sizeof(struct smb2_create_req) - 4 + | |
978 | iov[1].iov_len); | |
31f92e9a | 979 | le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable)); |
63eb3def PS |
980 | inc_rfc1001_len(&req->hdr, sizeof(struct create_durable)); |
981 | *num_iovec = num + 1; | |
982 | return 0; | |
983 | } | |
984 | ||
2503a0db | 985 | int |
064f6047 | 986 | SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path, |
b42bf888 PS |
987 | __u8 *oplock, struct smb2_file_all_info *buf, |
988 | struct smb2_err_rsp **err_buf) | |
2503a0db PS |
989 | { |
990 | struct smb2_create_req *req; | |
991 | struct smb2_create_rsp *rsp; | |
992 | struct TCP_Server_Info *server; | |
064f6047 | 993 | struct cifs_tcon *tcon = oparms->tcon; |
2503a0db | 994 | struct cifs_ses *ses = tcon->ses; |
63eb3def | 995 | struct kvec iov[4]; |
2503a0db PS |
996 | int resp_buftype; |
997 | int uni_path_len; | |
b8c32dbb PS |
998 | __le16 *copy_path = NULL; |
999 | int copy_size; | |
2503a0db | 1000 | int rc = 0; |
59aa3718 | 1001 | unsigned int num_iovecs = 2; |
ca81983f | 1002 | __u32 file_attributes = 0; |
2503a0db | 1003 | |
f96637be | 1004 | cifs_dbg(FYI, "create/open\n"); |
2503a0db PS |
1005 | |
1006 | if (ses && (ses->server)) | |
1007 | server = ses->server; | |
1008 | else | |
1009 | return -EIO; | |
1010 | ||
1011 | rc = small_smb2_init(SMB2_CREATE, tcon, (void **) &req); | |
1012 | if (rc) | |
1013 | return rc; | |
1014 | ||
064f6047 | 1015 | if (oparms->create_options & CREATE_OPTION_READONLY) |
ca81983f PS |
1016 | file_attributes |= ATTR_READONLY; |
1017 | ||
2503a0db | 1018 | req->ImpersonationLevel = IL_IMPERSONATION; |
064f6047 | 1019 | req->DesiredAccess = cpu_to_le32(oparms->desired_access); |
2503a0db PS |
1020 | /* File attributes ignored on open (used in create though) */ |
1021 | req->FileAttributes = cpu_to_le32(file_attributes); | |
1022 | req->ShareAccess = FILE_SHARE_ALL_LE; | |
064f6047 PS |
1023 | req->CreateDisposition = cpu_to_le32(oparms->disposition); |
1024 | req->CreateOptions = cpu_to_le32(oparms->create_options & CREATE_OPTIONS_MASK); | |
2503a0db | 1025 | uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2; |
59aa3718 PS |
1026 | /* do not count rfc1001 len field */ |
1027 | req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req) - 4); | |
2503a0db PS |
1028 | |
1029 | iov[0].iov_base = (char *)req; | |
1030 | /* 4 for rfc1002 length field */ | |
1031 | iov[0].iov_len = get_rfc1002_length(req) + 4; | |
1032 | ||
1033 | /* MUST set path len (NameLength) to 0 opening root of share */ | |
59aa3718 PS |
1034 | req->NameLength = cpu_to_le16(uni_path_len - 2); |
1035 | /* -1 since last byte is buf[0] which is sent below (path) */ | |
1036 | iov[0].iov_len--; | |
1037 | if (uni_path_len % 8 != 0) { | |
1038 | copy_size = uni_path_len / 8 * 8; | |
1039 | if (copy_size < uni_path_len) | |
1040 | copy_size += 8; | |
1041 | ||
1042 | copy_path = kzalloc(copy_size, GFP_KERNEL); | |
1043 | if (!copy_path) | |
1044 | return -ENOMEM; | |
1045 | memcpy((char *)copy_path, (const char *)path, | |
1046 | uni_path_len); | |
1047 | uni_path_len = copy_size; | |
1048 | path = copy_path; | |
2503a0db PS |
1049 | } |
1050 | ||
59aa3718 PS |
1051 | iov[1].iov_len = uni_path_len; |
1052 | iov[1].iov_base = path; | |
1053 | /* -1 since last byte is buf[0] which was counted in smb2_buf_len */ | |
1054 | inc_rfc1001_len(req, uni_path_len - 1); | |
1055 | ||
b8c32dbb PS |
1056 | if (!server->oplocks) |
1057 | *oplock = SMB2_OPLOCK_LEVEL_NONE; | |
1058 | ||
a41a28bd | 1059 | if (!(server->capabilities & SMB2_GLOBAL_CAP_LEASING) || |
b8c32dbb PS |
1060 | *oplock == SMB2_OPLOCK_LEVEL_NONE) |
1061 | req->RequestedOplockLevel = *oplock; | |
1062 | else { | |
a41a28bd | 1063 | rc = add_lease_context(server, iov, &num_iovecs, oplock); |
d22cbfec | 1064 | if (rc) { |
b8c32dbb PS |
1065 | cifs_small_buf_release(req); |
1066 | kfree(copy_path); | |
d22cbfec | 1067 | return rc; |
b8c32dbb | 1068 | } |
b8c32dbb PS |
1069 | } |
1070 | ||
63eb3def PS |
1071 | if (*oplock == SMB2_OPLOCK_LEVEL_BATCH) { |
1072 | /* need to set Next field of lease context if we request it */ | |
a41a28bd | 1073 | if (server->capabilities & SMB2_GLOBAL_CAP_LEASING) { |
63eb3def PS |
1074 | struct create_context *ccontext = |
1075 | (struct create_context *)iov[num_iovecs-1].iov_base; | |
1c46943f | 1076 | ccontext->Next = |
a41a28bd | 1077 | cpu_to_le32(server->vals->create_lease_size); |
63eb3def | 1078 | } |
9cbc0b73 | 1079 | rc = add_durable_context(iov, &num_iovecs, oparms); |
63eb3def PS |
1080 | if (rc) { |
1081 | cifs_small_buf_release(req); | |
1082 | kfree(copy_path); | |
1083 | kfree(iov[num_iovecs-1].iov_base); | |
1084 | return rc; | |
1085 | } | |
1086 | } | |
1087 | ||
2503a0db PS |
1088 | rc = SendReceive2(xid, ses, iov, num_iovecs, &resp_buftype, 0); |
1089 | rsp = (struct smb2_create_rsp *)iov[0].iov_base; | |
1090 | ||
1091 | if (rc != 0) { | |
1092 | cifs_stats_fail_inc(tcon, SMB2_CREATE_HE); | |
b42bf888 PS |
1093 | if (err_buf) |
1094 | *err_buf = kmemdup(rsp, get_rfc1002_length(rsp) + 4, | |
1095 | GFP_KERNEL); | |
2503a0db PS |
1096 | goto creat_exit; |
1097 | } | |
1098 | ||
064f6047 PS |
1099 | oparms->fid->persistent_fid = rsp->PersistentFileId; |
1100 | oparms->fid->volatile_fid = rsp->VolatileFileId; | |
f0df737e PS |
1101 | |
1102 | if (buf) { | |
1103 | memcpy(buf, &rsp->CreationTime, 32); | |
1104 | buf->AllocationSize = rsp->AllocationSize; | |
1105 | buf->EndOfFile = rsp->EndofFile; | |
1106 | buf->Attributes = rsp->FileAttributes; | |
1107 | buf->NumberOfLinks = cpu_to_le32(1); | |
1108 | buf->DeletePending = 0; | |
1109 | } | |
2e44b288 | 1110 | |
b8c32dbb | 1111 | if (rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE) |
42873b0a | 1112 | *oplock = parse_lease_state(server, rsp, &oparms->fid->epoch); |
b8c32dbb PS |
1113 | else |
1114 | *oplock = rsp->OplockLevel; | |
2503a0db | 1115 | creat_exit: |
b8c32dbb | 1116 | kfree(copy_path); |
2503a0db PS |
1117 | free_rsp_buf(resp_buftype, rsp); |
1118 | return rc; | |
1119 | } | |
1120 | ||
4a72dafa SF |
1121 | /* |
1122 | * SMB2 IOCTL is used for both IOCTLs and FSCTLs | |
1123 | */ | |
1124 | int | |
1125 | SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, | |
1126 | u64 volatile_fid, u32 opcode, bool is_fsctl, char *in_data, | |
1127 | u32 indatalen, char **out_data, u32 *plen /* returned data len */) | |
1128 | { | |
1129 | struct smb2_ioctl_req *req; | |
1130 | struct smb2_ioctl_rsp *rsp; | |
1131 | struct TCP_Server_Info *server; | |
1132 | struct cifs_ses *ses = tcon->ses; | |
1133 | struct kvec iov[2]; | |
1134 | int resp_buftype; | |
1135 | int num_iovecs; | |
1136 | int rc = 0; | |
1137 | ||
1138 | cifs_dbg(FYI, "SMB2 IOCTL\n"); | |
1139 | ||
1140 | /* zero out returned data len, in case of error */ | |
1141 | if (plen) | |
1142 | *plen = 0; | |
1143 | ||
1144 | if (ses && (ses->server)) | |
1145 | server = ses->server; | |
1146 | else | |
1147 | return -EIO; | |
1148 | ||
1149 | rc = small_smb2_init(SMB2_IOCTL, tcon, (void **) &req); | |
1150 | if (rc) | |
1151 | return rc; | |
1152 | ||
1153 | req->CtlCode = cpu_to_le32(opcode); | |
1154 | req->PersistentFileId = persistent_fid; | |
1155 | req->VolatileFileId = volatile_fid; | |
1156 | ||
1157 | if (indatalen) { | |
1158 | req->InputCount = cpu_to_le32(indatalen); | |
1159 | /* do not set InputOffset if no input data */ | |
1160 | req->InputOffset = | |
1161 | cpu_to_le32(offsetof(struct smb2_ioctl_req, Buffer) - 4); | |
1162 | iov[1].iov_base = in_data; | |
1163 | iov[1].iov_len = indatalen; | |
1164 | num_iovecs = 2; | |
1165 | } else | |
1166 | num_iovecs = 1; | |
1167 | ||
1168 | req->OutputOffset = 0; | |
1169 | req->OutputCount = 0; /* MBZ */ | |
1170 | ||
1171 | /* | |
1172 | * Could increase MaxOutputResponse, but that would require more | |
1173 | * than one credit. Windows typically sets this smaller, but for some | |
1174 | * ioctls it may be useful to allow server to send more. No point | |
1175 | * limiting what the server can send as long as fits in one credit | |
1176 | */ | |
1177 | req->MaxOutputResponse = cpu_to_le32(0xFF00); /* < 64K uses 1 credit */ | |
1178 | ||
1179 | if (is_fsctl) | |
1180 | req->Flags = cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL); | |
1181 | else | |
1182 | req->Flags = 0; | |
1183 | ||
1184 | iov[0].iov_base = (char *)req; | |
1185 | /* 4 for rfc1002 length field */ | |
1186 | iov[0].iov_len = get_rfc1002_length(req) + 4; | |
1187 | ||
1188 | if (indatalen) | |
1189 | inc_rfc1001_len(req, indatalen); | |
1190 | ||
1191 | rc = SendReceive2(xid, ses, iov, num_iovecs, &resp_buftype, 0); | |
1192 | rsp = (struct smb2_ioctl_rsp *)iov[0].iov_base; | |
1193 | ||
1194 | if (rc != 0) { | |
1195 | if (tcon) | |
1196 | cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE); | |
1197 | goto ioctl_exit; | |
1198 | } | |
1199 | ||
1200 | /* check if caller wants to look at return data or just return rc */ | |
1201 | if ((plen == NULL) || (out_data == NULL)) | |
1202 | goto ioctl_exit; | |
1203 | ||
1204 | *plen = le32_to_cpu(rsp->OutputCount); | |
1205 | ||
1206 | /* We check for obvious errors in the output buffer length and offset */ | |
1207 | if (*plen == 0) | |
1208 | goto ioctl_exit; /* server returned no data */ | |
1209 | else if (*plen > 0xFF00) { | |
1210 | cifs_dbg(VFS, "srv returned invalid ioctl length: %d\n", *plen); | |
1211 | *plen = 0; | |
1212 | rc = -EIO; | |
1213 | goto ioctl_exit; | |
1214 | } | |
1215 | ||
1216 | if (get_rfc1002_length(rsp) < le32_to_cpu(rsp->OutputOffset) + *plen) { | |
1217 | cifs_dbg(VFS, "Malformed ioctl resp: len %d offset %d\n", *plen, | |
1218 | le32_to_cpu(rsp->OutputOffset)); | |
1219 | *plen = 0; | |
1220 | rc = -EIO; | |
1221 | goto ioctl_exit; | |
1222 | } | |
1223 | ||
1224 | *out_data = kmalloc(*plen, GFP_KERNEL); | |
1225 | if (*out_data == NULL) { | |
1226 | rc = -ENOMEM; | |
1227 | goto ioctl_exit; | |
1228 | } | |
1229 | ||
1230 | memcpy(*out_data, rsp->hdr.ProtocolId + le32_to_cpu(rsp->OutputOffset), | |
1231 | *plen); | |
1232 | ioctl_exit: | |
1233 | free_rsp_buf(resp_buftype, rsp); | |
1234 | return rc; | |
1235 | } | |
1236 | ||
2503a0db PS |
1237 | int |
1238 | SMB2_close(const unsigned int xid, struct cifs_tcon *tcon, | |
1239 | u64 persistent_fid, u64 volatile_fid) | |
1240 | { | |
1241 | struct smb2_close_req *req; | |
1242 | struct smb2_close_rsp *rsp; | |
1243 | struct TCP_Server_Info *server; | |
1244 | struct cifs_ses *ses = tcon->ses; | |
1245 | struct kvec iov[1]; | |
1246 | int resp_buftype; | |
1247 | int rc = 0; | |
1248 | ||
f96637be | 1249 | cifs_dbg(FYI, "Close\n"); |
2503a0db PS |
1250 | |
1251 | if (ses && (ses->server)) | |
1252 | server = ses->server; | |
1253 | else | |
1254 | return -EIO; | |
1255 | ||
1256 | rc = small_smb2_init(SMB2_CLOSE, tcon, (void **) &req); | |
1257 | if (rc) | |
1258 | return rc; | |
1259 | ||
1260 | req->PersistentFileId = persistent_fid; | |
1261 | req->VolatileFileId = volatile_fid; | |
1262 | ||
1263 | iov[0].iov_base = (char *)req; | |
1264 | /* 4 for rfc1002 length field */ | |
1265 | iov[0].iov_len = get_rfc1002_length(req) + 4; | |
1266 | ||
1267 | rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0); | |
1268 | rsp = (struct smb2_close_rsp *)iov[0].iov_base; | |
1269 | ||
1270 | if (rc != 0) { | |
1271 | if (tcon) | |
1272 | cifs_stats_fail_inc(tcon, SMB2_CLOSE_HE); | |
1273 | goto close_exit; | |
1274 | } | |
1275 | ||
2503a0db PS |
1276 | /* BB FIXME - decode close response, update inode for caching */ |
1277 | ||
1278 | close_exit: | |
1279 | free_rsp_buf(resp_buftype, rsp); | |
1280 | return rc; | |
1281 | } | |
be4cb9e3 PS |
1282 | |
1283 | static int | |
1284 | validate_buf(unsigned int offset, unsigned int buffer_length, | |
1285 | struct smb2_hdr *hdr, unsigned int min_buf_size) | |
1286 | ||
1287 | { | |
1288 | unsigned int smb_len = be32_to_cpu(hdr->smb2_buf_length); | |
1289 | char *end_of_smb = smb_len + 4 /* RFC1001 length field */ + (char *)hdr; | |
1290 | char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr; | |
1291 | char *end_of_buf = begin_of_buf + buffer_length; | |
1292 | ||
1293 | ||
1294 | if (buffer_length < min_buf_size) { | |
f96637be JP |
1295 | cifs_dbg(VFS, "buffer length %d smaller than minimum size %d\n", |
1296 | buffer_length, min_buf_size); | |
be4cb9e3 PS |
1297 | return -EINVAL; |
1298 | } | |
1299 | ||
1300 | /* check if beyond RFC1001 maximum length */ | |
1301 | if ((smb_len > 0x7FFFFF) || (buffer_length > 0x7FFFFF)) { | |
f96637be JP |
1302 | cifs_dbg(VFS, "buffer length %d or smb length %d too large\n", |
1303 | buffer_length, smb_len); | |
be4cb9e3 PS |
1304 | return -EINVAL; |
1305 | } | |
1306 | ||
1307 | if ((begin_of_buf > end_of_smb) || (end_of_buf > end_of_smb)) { | |
f96637be | 1308 | cifs_dbg(VFS, "illegal server response, bad offset to data\n"); |
be4cb9e3 PS |
1309 | return -EINVAL; |
1310 | } | |
1311 | ||
1312 | return 0; | |
1313 | } | |
1314 | ||
1315 | /* | |
1316 | * If SMB buffer fields are valid, copy into temporary buffer to hold result. | |
1317 | * Caller must free buffer. | |
1318 | */ | |
1319 | static int | |
1320 | validate_and_copy_buf(unsigned int offset, unsigned int buffer_length, | |
1321 | struct smb2_hdr *hdr, unsigned int minbufsize, | |
1322 | char *data) | |
1323 | ||
1324 | { | |
1325 | char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr; | |
1326 | int rc; | |
1327 | ||
1328 | if (!data) | |
1329 | return -EINVAL; | |
1330 | ||
1331 | rc = validate_buf(offset, buffer_length, hdr, minbufsize); | |
1332 | if (rc) | |
1333 | return rc; | |
1334 | ||
1335 | memcpy(data, begin_of_buf, buffer_length); | |
1336 | ||
1337 | return 0; | |
1338 | } | |
1339 | ||
f0df737e PS |
1340 | static int |
1341 | query_info(const unsigned int xid, struct cifs_tcon *tcon, | |
1342 | u64 persistent_fid, u64 volatile_fid, u8 info_class, | |
1343 | size_t output_len, size_t min_len, void *data) | |
be4cb9e3 PS |
1344 | { |
1345 | struct smb2_query_info_req *req; | |
1346 | struct smb2_query_info_rsp *rsp = NULL; | |
1347 | struct kvec iov[2]; | |
1348 | int rc = 0; | |
1349 | int resp_buftype; | |
1350 | struct TCP_Server_Info *server; | |
1351 | struct cifs_ses *ses = tcon->ses; | |
1352 | ||
f96637be | 1353 | cifs_dbg(FYI, "Query Info\n"); |
be4cb9e3 PS |
1354 | |
1355 | if (ses && (ses->server)) | |
1356 | server = ses->server; | |
1357 | else | |
1358 | return -EIO; | |
1359 | ||
1360 | rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req); | |
1361 | if (rc) | |
1362 | return rc; | |
1363 | ||
1364 | req->InfoType = SMB2_O_INFO_FILE; | |
f0df737e | 1365 | req->FileInfoClass = info_class; |
be4cb9e3 PS |
1366 | req->PersistentFileId = persistent_fid; |
1367 | req->VolatileFileId = volatile_fid; | |
1368 | /* 4 for rfc1002 length field and 1 for Buffer */ | |
1369 | req->InputBufferOffset = | |
1370 | cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4); | |
f0df737e | 1371 | req->OutputBufferLength = cpu_to_le32(output_len); |
be4cb9e3 PS |
1372 | |
1373 | iov[0].iov_base = (char *)req; | |
1374 | /* 4 for rfc1002 length field */ | |
1375 | iov[0].iov_len = get_rfc1002_length(req) + 4; | |
1376 | ||
1377 | rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0); | |
e5d04887 PS |
1378 | rsp = (struct smb2_query_info_rsp *)iov[0].iov_base; |
1379 | ||
be4cb9e3 PS |
1380 | if (rc) { |
1381 | cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE); | |
1382 | goto qinf_exit; | |
1383 | } | |
1384 | ||
be4cb9e3 PS |
1385 | rc = validate_and_copy_buf(le16_to_cpu(rsp->OutputBufferOffset), |
1386 | le32_to_cpu(rsp->OutputBufferLength), | |
f0df737e | 1387 | &rsp->hdr, min_len, data); |
be4cb9e3 PS |
1388 | |
1389 | qinf_exit: | |
1390 | free_rsp_buf(resp_buftype, rsp); | |
1391 | return rc; | |
1392 | } | |
9094fad1 | 1393 | |
f0df737e PS |
1394 | int |
1395 | SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon, | |
1396 | u64 persistent_fid, u64 volatile_fid, | |
1397 | struct smb2_file_all_info *data) | |
1398 | { | |
1399 | return query_info(xid, tcon, persistent_fid, volatile_fid, | |
1400 | FILE_ALL_INFORMATION, | |
1401 | sizeof(struct smb2_file_all_info) + MAX_NAME * 2, | |
1402 | sizeof(struct smb2_file_all_info), data); | |
1403 | } | |
1404 | ||
1405 | int | |
1406 | SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon, | |
1407 | u64 persistent_fid, u64 volatile_fid, __le64 *uniqueid) | |
1408 | { | |
1409 | return query_info(xid, tcon, persistent_fid, volatile_fid, | |
1410 | FILE_INTERNAL_INFORMATION, | |
1411 | sizeof(struct smb2_file_internal_info), | |
1412 | sizeof(struct smb2_file_internal_info), uniqueid); | |
1413 | } | |
1414 | ||
9094fad1 PS |
1415 | /* |
1416 | * This is a no-op for now. We're not really interested in the reply, but | |
1417 | * rather in the fact that the server sent one and that server->lstrp | |
1418 | * gets updated. | |
1419 | * | |
1420 | * FIXME: maybe we should consider checking that the reply matches request? | |
1421 | */ | |
1422 | static void | |
1423 | smb2_echo_callback(struct mid_q_entry *mid) | |
1424 | { | |
1425 | struct TCP_Server_Info *server = mid->callback_data; | |
1426 | struct smb2_echo_rsp *smb2 = (struct smb2_echo_rsp *)mid->resp_buf; | |
1427 | unsigned int credits_received = 1; | |
1428 | ||
1429 | if (mid->mid_state == MID_RESPONSE_RECEIVED) | |
1430 | credits_received = le16_to_cpu(smb2->hdr.CreditRequest); | |
1431 | ||
1432 | DeleteMidQEntry(mid); | |
1433 | add_credits(server, credits_received, CIFS_ECHO_OP); | |
1434 | } | |
1435 | ||
1436 | int | |
1437 | SMB2_echo(struct TCP_Server_Info *server) | |
1438 | { | |
1439 | struct smb2_echo_req *req; | |
1440 | int rc = 0; | |
1441 | struct kvec iov; | |
fec344e3 JL |
1442 | struct smb_rqst rqst = { .rq_iov = &iov, |
1443 | .rq_nvec = 1 }; | |
9094fad1 | 1444 | |
f96637be | 1445 | cifs_dbg(FYI, "In echo request\n"); |
9094fad1 PS |
1446 | |
1447 | rc = small_smb2_init(SMB2_ECHO, NULL, (void **)&req); | |
1448 | if (rc) | |
1449 | return rc; | |
1450 | ||
1451 | req->hdr.CreditRequest = cpu_to_le16(1); | |
1452 | ||
1453 | iov.iov_base = (char *)req; | |
1454 | /* 4 for rfc1002 length field */ | |
1455 | iov.iov_len = get_rfc1002_length(req) + 4; | |
1456 | ||
fec344e3 | 1457 | rc = cifs_call_async(server, &rqst, NULL, smb2_echo_callback, server, |
9094fad1 PS |
1458 | CIFS_ECHO_OP); |
1459 | if (rc) | |
f96637be | 1460 | cifs_dbg(FYI, "Echo request failed: %d\n", rc); |
9094fad1 PS |
1461 | |
1462 | cifs_small_buf_release(req); | |
1463 | return rc; | |
1464 | } | |
7a5cfb19 PS |
1465 | |
1466 | int | |
1467 | SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, | |
1468 | u64 volatile_fid) | |
1469 | { | |
1470 | struct smb2_flush_req *req; | |
1471 | struct TCP_Server_Info *server; | |
1472 | struct cifs_ses *ses = tcon->ses; | |
1473 | struct kvec iov[1]; | |
1474 | int resp_buftype; | |
1475 | int rc = 0; | |
1476 | ||
f96637be | 1477 | cifs_dbg(FYI, "Flush\n"); |
7a5cfb19 PS |
1478 | |
1479 | if (ses && (ses->server)) | |
1480 | server = ses->server; | |
1481 | else | |
1482 | return -EIO; | |
1483 | ||
1484 | rc = small_smb2_init(SMB2_FLUSH, tcon, (void **) &req); | |
1485 | if (rc) | |
1486 | return rc; | |
1487 | ||
1488 | req->PersistentFileId = persistent_fid; | |
1489 | req->VolatileFileId = volatile_fid; | |
1490 | ||
1491 | iov[0].iov_base = (char *)req; | |
1492 | /* 4 for rfc1002 length field */ | |
1493 | iov[0].iov_len = get_rfc1002_length(req) + 4; | |
1494 | ||
1495 | rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0); | |
1496 | ||
1497 | if ((rc != 0) && tcon) | |
1498 | cifs_stats_fail_inc(tcon, SMB2_FLUSH_HE); | |
1499 | ||
1500 | free_rsp_buf(resp_buftype, iov[0].iov_base); | |
1501 | return rc; | |
1502 | } | |
09a4707e PS |
1503 | |
1504 | /* | |
1505 | * To form a chain of read requests, any read requests after the first should | |
1506 | * have the end_of_chain boolean set to true. | |
1507 | */ | |
1508 | static int | |
1509 | smb2_new_read_req(struct kvec *iov, struct cifs_io_parms *io_parms, | |
1510 | unsigned int remaining_bytes, int request_type) | |
1511 | { | |
1512 | int rc = -EACCES; | |
1513 | struct smb2_read_req *req = NULL; | |
1514 | ||
1515 | rc = small_smb2_init(SMB2_READ, io_parms->tcon, (void **) &req); | |
1516 | if (rc) | |
1517 | return rc; | |
1518 | if (io_parms->tcon->ses->server == NULL) | |
1519 | return -ECONNABORTED; | |
1520 | ||
1521 | req->hdr.ProcessId = cpu_to_le32(io_parms->pid); | |
1522 | ||
1523 | req->PersistentFileId = io_parms->persistent_fid; | |
1524 | req->VolatileFileId = io_parms->volatile_fid; | |
1525 | req->ReadChannelInfoOffset = 0; /* reserved */ | |
1526 | req->ReadChannelInfoLength = 0; /* reserved */ | |
1527 | req->Channel = 0; /* reserved */ | |
1528 | req->MinimumCount = 0; | |
1529 | req->Length = cpu_to_le32(io_parms->length); | |
1530 | req->Offset = cpu_to_le64(io_parms->offset); | |
1531 | ||
1532 | if (request_type & CHAINED_REQUEST) { | |
1533 | if (!(request_type & END_OF_CHAIN)) { | |
1534 | /* 4 for rfc1002 length field */ | |
1535 | req->hdr.NextCommand = | |
1536 | cpu_to_le32(get_rfc1002_length(req) + 4); | |
1537 | } else /* END_OF_CHAIN */ | |
1538 | req->hdr.NextCommand = 0; | |
1539 | if (request_type & RELATED_REQUEST) { | |
1540 | req->hdr.Flags |= SMB2_FLAGS_RELATED_OPERATIONS; | |
1541 | /* | |
1542 | * Related requests use info from previous read request | |
1543 | * in chain. | |
1544 | */ | |
1545 | req->hdr.SessionId = 0xFFFFFFFF; | |
1546 | req->hdr.TreeId = 0xFFFFFFFF; | |
1547 | req->PersistentFileId = 0xFFFFFFFF; | |
1548 | req->VolatileFileId = 0xFFFFFFFF; | |
1549 | } | |
1550 | } | |
1551 | if (remaining_bytes > io_parms->length) | |
1552 | req->RemainingBytes = cpu_to_le32(remaining_bytes); | |
1553 | else | |
1554 | req->RemainingBytes = 0; | |
1555 | ||
1556 | iov[0].iov_base = (char *)req; | |
1557 | /* 4 for rfc1002 length field */ | |
1558 | iov[0].iov_len = get_rfc1002_length(req) + 4; | |
1559 | return rc; | |
1560 | } | |
1561 | ||
1562 | static void | |
1563 | smb2_readv_callback(struct mid_q_entry *mid) | |
1564 | { | |
1565 | struct cifs_readdata *rdata = mid->callback_data; | |
1566 | struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink); | |
1567 | struct TCP_Server_Info *server = tcon->ses->server; | |
5819575e | 1568 | struct smb2_hdr *buf = (struct smb2_hdr *)rdata->iov.iov_base; |
09a4707e | 1569 | unsigned int credits_received = 1; |
5819575e | 1570 | struct smb_rqst rqst = { .rq_iov = &rdata->iov, |
8321fec4 JL |
1571 | .rq_nvec = 1, |
1572 | .rq_pages = rdata->pages, | |
1573 | .rq_npages = rdata->nr_pages, | |
1574 | .rq_pagesz = rdata->pagesz, | |
1575 | .rq_tailsz = rdata->tailsz }; | |
09a4707e | 1576 | |
f96637be JP |
1577 | cifs_dbg(FYI, "%s: mid=%llu state=%d result=%d bytes=%u\n", |
1578 | __func__, mid->mid, mid->mid_state, rdata->result, | |
1579 | rdata->bytes); | |
09a4707e PS |
1580 | |
1581 | switch (mid->mid_state) { | |
1582 | case MID_RESPONSE_RECEIVED: | |
1583 | credits_received = le16_to_cpu(buf->CreditRequest); | |
1584 | /* result already set, check signature */ | |
38d77c50 | 1585 | if (server->sign) { |
3c1bf7e4 PS |
1586 | int rc; |
1587 | ||
0b688cfc | 1588 | rc = smb2_verify_signature(&rqst, server); |
3c1bf7e4 | 1589 | if (rc) |
f96637be JP |
1590 | cifs_dbg(VFS, "SMB signature verification returned error = %d\n", |
1591 | rc); | |
3c1bf7e4 | 1592 | } |
09a4707e PS |
1593 | /* FIXME: should this be counted toward the initiating task? */ |
1594 | task_io_account_read(rdata->bytes); | |
1595 | cifs_stats_bytes_read(tcon, rdata->bytes); | |
1596 | break; | |
1597 | case MID_REQUEST_SUBMITTED: | |
1598 | case MID_RETRY_NEEDED: | |
1599 | rdata->result = -EAGAIN; | |
1600 | break; | |
1601 | default: | |
1602 | if (rdata->result != -ENODATA) | |
1603 | rdata->result = -EIO; | |
1604 | } | |
1605 | ||
1606 | if (rdata->result) | |
1607 | cifs_stats_fail_inc(tcon, SMB2_READ_HE); | |
1608 | ||
1609 | queue_work(cifsiod_wq, &rdata->work); | |
1610 | DeleteMidQEntry(mid); | |
1611 | add_credits(server, credits_received, 0); | |
1612 | } | |
1613 | ||
1614 | /* smb2_async_readv - send an async write, and set up mid to handle result */ | |
1615 | int | |
1616 | smb2_async_readv(struct cifs_readdata *rdata) | |
1617 | { | |
1618 | int rc; | |
1619 | struct smb2_hdr *buf; | |
1620 | struct cifs_io_parms io_parms; | |
5819575e | 1621 | struct smb_rqst rqst = { .rq_iov = &rdata->iov, |
fec344e3 | 1622 | .rq_nvec = 1 }; |
09a4707e | 1623 | |
f96637be JP |
1624 | cifs_dbg(FYI, "%s: offset=%llu bytes=%u\n", |
1625 | __func__, rdata->offset, rdata->bytes); | |
09a4707e PS |
1626 | |
1627 | io_parms.tcon = tlink_tcon(rdata->cfile->tlink); | |
1628 | io_parms.offset = rdata->offset; | |
1629 | io_parms.length = rdata->bytes; | |
1630 | io_parms.persistent_fid = rdata->cfile->fid.persistent_fid; | |
1631 | io_parms.volatile_fid = rdata->cfile->fid.volatile_fid; | |
1632 | io_parms.pid = rdata->pid; | |
5819575e | 1633 | rc = smb2_new_read_req(&rdata->iov, &io_parms, 0, 0); |
09a4707e PS |
1634 | if (rc) |
1635 | return rc; | |
1636 | ||
5819575e | 1637 | buf = (struct smb2_hdr *)rdata->iov.iov_base; |
09a4707e | 1638 | /* 4 for rfc1002 length field */ |
5819575e | 1639 | rdata->iov.iov_len = get_rfc1002_length(rdata->iov.iov_base) + 4; |
09a4707e PS |
1640 | |
1641 | kref_get(&rdata->refcount); | |
fec344e3 | 1642 | rc = cifs_call_async(io_parms.tcon->ses->server, &rqst, |
09a4707e PS |
1643 | cifs_readv_receive, smb2_readv_callback, |
1644 | rdata, 0); | |
e5d04887 | 1645 | if (rc) { |
09a4707e | 1646 | kref_put(&rdata->refcount, cifs_readdata_release); |
e5d04887 PS |
1647 | cifs_stats_fail_inc(io_parms.tcon, SMB2_READ_HE); |
1648 | } | |
09a4707e PS |
1649 | |
1650 | cifs_small_buf_release(buf); | |
1651 | return rc; | |
1652 | } | |
33319141 | 1653 | |
d8e05039 PS |
1654 | int |
1655 | SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms, | |
1656 | unsigned int *nbytes, char **buf, int *buf_type) | |
1657 | { | |
1658 | int resp_buftype, rc = -EACCES; | |
1659 | struct smb2_read_rsp *rsp = NULL; | |
1660 | struct kvec iov[1]; | |
1661 | ||
1662 | *nbytes = 0; | |
1663 | rc = smb2_new_read_req(iov, io_parms, 0, 0); | |
1664 | if (rc) | |
1665 | return rc; | |
1666 | ||
1667 | rc = SendReceive2(xid, io_parms->tcon->ses, iov, 1, | |
1668 | &resp_buftype, CIFS_LOG_ERROR); | |
1669 | ||
1670 | rsp = (struct smb2_read_rsp *)iov[0].iov_base; | |
1671 | ||
1672 | if (rsp->hdr.Status == STATUS_END_OF_FILE) { | |
1673 | free_rsp_buf(resp_buftype, iov[0].iov_base); | |
1674 | return 0; | |
1675 | } | |
1676 | ||
1677 | if (rc) { | |
1678 | cifs_stats_fail_inc(io_parms->tcon, SMB2_READ_HE); | |
f96637be | 1679 | cifs_dbg(VFS, "Send error in read = %d\n", rc); |
d8e05039 PS |
1680 | } else { |
1681 | *nbytes = le32_to_cpu(rsp->DataLength); | |
1682 | if ((*nbytes > CIFS_MAX_MSGSIZE) || | |
1683 | (*nbytes > io_parms->length)) { | |
f96637be JP |
1684 | cifs_dbg(FYI, "bad length %d for count %d\n", |
1685 | *nbytes, io_parms->length); | |
d8e05039 PS |
1686 | rc = -EIO; |
1687 | *nbytes = 0; | |
1688 | } | |
1689 | } | |
1690 | ||
1691 | if (*buf) { | |
1692 | memcpy(*buf, (char *)rsp->hdr.ProtocolId + rsp->DataOffset, | |
1693 | *nbytes); | |
1694 | free_rsp_buf(resp_buftype, iov[0].iov_base); | |
1695 | } else if (resp_buftype != CIFS_NO_BUFFER) { | |
1696 | *buf = iov[0].iov_base; | |
1697 | if (resp_buftype == CIFS_SMALL_BUFFER) | |
1698 | *buf_type = CIFS_SMALL_BUFFER; | |
1699 | else if (resp_buftype == CIFS_LARGE_BUFFER) | |
1700 | *buf_type = CIFS_LARGE_BUFFER; | |
1701 | } | |
1702 | return rc; | |
1703 | } | |
1704 | ||
33319141 PS |
1705 | /* |
1706 | * Check the mid_state and signature on received buffer (if any), and queue the | |
1707 | * workqueue completion task. | |
1708 | */ | |
1709 | static void | |
1710 | smb2_writev_callback(struct mid_q_entry *mid) | |
1711 | { | |
1712 | struct cifs_writedata *wdata = mid->callback_data; | |
1713 | struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink); | |
1714 | unsigned int written; | |
1715 | struct smb2_write_rsp *rsp = (struct smb2_write_rsp *)mid->resp_buf; | |
1716 | unsigned int credits_received = 1; | |
1717 | ||
1718 | switch (mid->mid_state) { | |
1719 | case MID_RESPONSE_RECEIVED: | |
1720 | credits_received = le16_to_cpu(rsp->hdr.CreditRequest); | |
1721 | wdata->result = smb2_check_receive(mid, tcon->ses->server, 0); | |
1722 | if (wdata->result != 0) | |
1723 | break; | |
1724 | ||
1725 | written = le32_to_cpu(rsp->DataLength); | |
1726 | /* | |
1727 | * Mask off high 16 bits when bytes written as returned | |
1728 | * by the server is greater than bytes requested by the | |
1729 | * client. OS/2 servers are known to set incorrect | |
1730 | * CountHigh values. | |
1731 | */ | |
1732 | if (written > wdata->bytes) | |
1733 | written &= 0xFFFF; | |
1734 | ||
1735 | if (written < wdata->bytes) | |
1736 | wdata->result = -ENOSPC; | |
1737 | else | |
1738 | wdata->bytes = written; | |
1739 | break; | |
1740 | case MID_REQUEST_SUBMITTED: | |
1741 | case MID_RETRY_NEEDED: | |
1742 | wdata->result = -EAGAIN; | |
1743 | break; | |
1744 | default: | |
1745 | wdata->result = -EIO; | |
1746 | break; | |
1747 | } | |
1748 | ||
1749 | if (wdata->result) | |
1750 | cifs_stats_fail_inc(tcon, SMB2_WRITE_HE); | |
1751 | ||
1752 | queue_work(cifsiod_wq, &wdata->work); | |
1753 | DeleteMidQEntry(mid); | |
1754 | add_credits(tcon->ses->server, credits_received, 0); | |
1755 | } | |
1756 | ||
1757 | /* smb2_async_writev - send an async write, and set up mid to handle result */ | |
1758 | int | |
1759 | smb2_async_writev(struct cifs_writedata *wdata) | |
1760 | { | |
eddb079d | 1761 | int rc = -EACCES; |
33319141 PS |
1762 | struct smb2_write_req *req = NULL; |
1763 | struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink); | |
eddb079d | 1764 | struct kvec iov; |
fec344e3 | 1765 | struct smb_rqst rqst; |
33319141 PS |
1766 | |
1767 | rc = small_smb2_init(SMB2_WRITE, tcon, (void **) &req); | |
1768 | if (rc) | |
1769 | goto async_writev_out; | |
1770 | ||
33319141 PS |
1771 | req->hdr.ProcessId = cpu_to_le32(wdata->cfile->pid); |
1772 | ||
1773 | req->PersistentFileId = wdata->cfile->fid.persistent_fid; | |
1774 | req->VolatileFileId = wdata->cfile->fid.volatile_fid; | |
1775 | req->WriteChannelInfoOffset = 0; | |
1776 | req->WriteChannelInfoLength = 0; | |
1777 | req->Channel = 0; | |
1778 | req->Offset = cpu_to_le64(wdata->offset); | |
1779 | /* 4 for rfc1002 length field */ | |
1780 | req->DataOffset = cpu_to_le16( | |
1781 | offsetof(struct smb2_write_req, Buffer) - 4); | |
1782 | req->RemainingBytes = 0; | |
1783 | ||
1784 | /* 4 for rfc1002 length field and 1 for Buffer */ | |
eddb079d JL |
1785 | iov.iov_len = get_rfc1002_length(req) + 4 - 1; |
1786 | iov.iov_base = req; | |
33319141 | 1787 | |
eddb079d JL |
1788 | rqst.rq_iov = &iov; |
1789 | rqst.rq_nvec = 1; | |
1790 | rqst.rq_pages = wdata->pages; | |
1791 | rqst.rq_npages = wdata->nr_pages; | |
1792 | rqst.rq_pagesz = wdata->pagesz; | |
1793 | rqst.rq_tailsz = wdata->tailsz; | |
33319141 | 1794 | |
f96637be JP |
1795 | cifs_dbg(FYI, "async write at %llu %u bytes\n", |
1796 | wdata->offset, wdata->bytes); | |
33319141 PS |
1797 | |
1798 | req->Length = cpu_to_le32(wdata->bytes); | |
1799 | ||
1800 | inc_rfc1001_len(&req->hdr, wdata->bytes - 1 /* Buffer */); | |
1801 | ||
1802 | kref_get(&wdata->refcount); | |
fec344e3 JL |
1803 | rc = cifs_call_async(tcon->ses->server, &rqst, NULL, |
1804 | smb2_writev_callback, wdata, 0); | |
33319141 | 1805 | |
e5d04887 | 1806 | if (rc) { |
33319141 | 1807 | kref_put(&wdata->refcount, cifs_writedata_release); |
e5d04887 PS |
1808 | cifs_stats_fail_inc(tcon, SMB2_WRITE_HE); |
1809 | } | |
33319141 | 1810 | |
33319141 PS |
1811 | async_writev_out: |
1812 | cifs_small_buf_release(req); | |
33319141 PS |
1813 | return rc; |
1814 | } | |
009d3443 PS |
1815 | |
1816 | /* | |
1817 | * SMB2_write function gets iov pointer to kvec array with n_vec as a length. | |
1818 | * The length field from io_parms must be at least 1 and indicates a number of | |
1819 | * elements with data to write that begins with position 1 in iov array. All | |
1820 | * data length is specified by count. | |
1821 | */ | |
1822 | int | |
1823 | SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms, | |
1824 | unsigned int *nbytes, struct kvec *iov, int n_vec) | |
1825 | { | |
1826 | int rc = 0; | |
1827 | struct smb2_write_req *req = NULL; | |
1828 | struct smb2_write_rsp *rsp = NULL; | |
1829 | int resp_buftype; | |
1830 | *nbytes = 0; | |
1831 | ||
1832 | if (n_vec < 1) | |
1833 | return rc; | |
1834 | ||
1835 | rc = small_smb2_init(SMB2_WRITE, io_parms->tcon, (void **) &req); | |
1836 | if (rc) | |
1837 | return rc; | |
1838 | ||
1839 | if (io_parms->tcon->ses->server == NULL) | |
1840 | return -ECONNABORTED; | |
1841 | ||
1842 | req->hdr.ProcessId = cpu_to_le32(io_parms->pid); | |
1843 | ||
1844 | req->PersistentFileId = io_parms->persistent_fid; | |
1845 | req->VolatileFileId = io_parms->volatile_fid; | |
1846 | req->WriteChannelInfoOffset = 0; | |
1847 | req->WriteChannelInfoLength = 0; | |
1848 | req->Channel = 0; | |
1849 | req->Length = cpu_to_le32(io_parms->length); | |
1850 | req->Offset = cpu_to_le64(io_parms->offset); | |
1851 | /* 4 for rfc1002 length field */ | |
1852 | req->DataOffset = cpu_to_le16( | |
1853 | offsetof(struct smb2_write_req, Buffer) - 4); | |
1854 | req->RemainingBytes = 0; | |
1855 | ||
1856 | iov[0].iov_base = (char *)req; | |
1857 | /* 4 for rfc1002 length field and 1 for Buffer */ | |
1858 | iov[0].iov_len = get_rfc1002_length(req) + 4 - 1; | |
1859 | ||
1860 | /* length of entire message including data to be written */ | |
1861 | inc_rfc1001_len(req, io_parms->length - 1 /* Buffer */); | |
1862 | ||
1863 | rc = SendReceive2(xid, io_parms->tcon->ses, iov, n_vec + 1, | |
1864 | &resp_buftype, 0); | |
e5d04887 | 1865 | rsp = (struct smb2_write_rsp *)iov[0].iov_base; |
009d3443 PS |
1866 | |
1867 | if (rc) { | |
1868 | cifs_stats_fail_inc(io_parms->tcon, SMB2_WRITE_HE); | |
f96637be | 1869 | cifs_dbg(VFS, "Send error in write = %d\n", rc); |
e5d04887 | 1870 | } else |
009d3443 | 1871 | *nbytes = le32_to_cpu(rsp->DataLength); |
e5d04887 PS |
1872 | |
1873 | free_rsp_buf(resp_buftype, rsp); | |
009d3443 PS |
1874 | return rc; |
1875 | } | |
35143eb5 | 1876 | |
d324f08d PS |
1877 | static unsigned int |
1878 | num_entries(char *bufstart, char *end_of_buf, char **lastentry, size_t size) | |
1879 | { | |
1880 | int len; | |
1881 | unsigned int entrycount = 0; | |
1882 | unsigned int next_offset = 0; | |
1883 | FILE_DIRECTORY_INFO *entryptr; | |
1884 | ||
1885 | if (bufstart == NULL) | |
1886 | return 0; | |
1887 | ||
1888 | entryptr = (FILE_DIRECTORY_INFO *)bufstart; | |
1889 | ||
1890 | while (1) { | |
1891 | entryptr = (FILE_DIRECTORY_INFO *) | |
1892 | ((char *)entryptr + next_offset); | |
1893 | ||
1894 | if ((char *)entryptr + size > end_of_buf) { | |
f96637be | 1895 | cifs_dbg(VFS, "malformed search entry would overflow\n"); |
d324f08d PS |
1896 | break; |
1897 | } | |
1898 | ||
1899 | len = le32_to_cpu(entryptr->FileNameLength); | |
1900 | if ((char *)entryptr + len + size > end_of_buf) { | |
f96637be JP |
1901 | cifs_dbg(VFS, "directory entry name would overflow frame end of buf %p\n", |
1902 | end_of_buf); | |
d324f08d PS |
1903 | break; |
1904 | } | |
1905 | ||
1906 | *lastentry = (char *)entryptr; | |
1907 | entrycount++; | |
1908 | ||
1909 | next_offset = le32_to_cpu(entryptr->NextEntryOffset); | |
1910 | if (!next_offset) | |
1911 | break; | |
1912 | } | |
1913 | ||
1914 | return entrycount; | |
1915 | } | |
1916 | ||
1917 | /* | |
1918 | * Readdir/FindFirst | |
1919 | */ | |
1920 | int | |
1921 | SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon, | |
1922 | u64 persistent_fid, u64 volatile_fid, int index, | |
1923 | struct cifs_search_info *srch_inf) | |
1924 | { | |
1925 | struct smb2_query_directory_req *req; | |
1926 | struct smb2_query_directory_rsp *rsp = NULL; | |
1927 | struct kvec iov[2]; | |
1928 | int rc = 0; | |
1929 | int len; | |
1930 | int resp_buftype; | |
1931 | unsigned char *bufptr; | |
1932 | struct TCP_Server_Info *server; | |
1933 | struct cifs_ses *ses = tcon->ses; | |
1934 | __le16 asteriks = cpu_to_le16('*'); | |
1935 | char *end_of_smb; | |
1936 | unsigned int output_size = CIFSMaxBufSize; | |
1937 | size_t info_buf_size; | |
1938 | ||
1939 | if (ses && (ses->server)) | |
1940 | server = ses->server; | |
1941 | else | |
1942 | return -EIO; | |
1943 | ||
1944 | rc = small_smb2_init(SMB2_QUERY_DIRECTORY, tcon, (void **) &req); | |
1945 | if (rc) | |
1946 | return rc; | |
1947 | ||
1948 | switch (srch_inf->info_level) { | |
1949 | case SMB_FIND_FILE_DIRECTORY_INFO: | |
1950 | req->FileInformationClass = FILE_DIRECTORY_INFORMATION; | |
1951 | info_buf_size = sizeof(FILE_DIRECTORY_INFO) - 1; | |
1952 | break; | |
1953 | case SMB_FIND_FILE_ID_FULL_DIR_INFO: | |
1954 | req->FileInformationClass = FILEID_FULL_DIRECTORY_INFORMATION; | |
1955 | info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO) - 1; | |
1956 | break; | |
1957 | default: | |
f96637be JP |
1958 | cifs_dbg(VFS, "info level %u isn't supported\n", |
1959 | srch_inf->info_level); | |
d324f08d PS |
1960 | rc = -EINVAL; |
1961 | goto qdir_exit; | |
1962 | } | |
1963 | ||
1964 | req->FileIndex = cpu_to_le32(index); | |
1965 | req->PersistentFileId = persistent_fid; | |
1966 | req->VolatileFileId = volatile_fid; | |
1967 | ||
1968 | len = 0x2; | |
1969 | bufptr = req->Buffer; | |
1970 | memcpy(bufptr, &asteriks, len); | |
1971 | ||
1972 | req->FileNameOffset = | |
1973 | cpu_to_le16(sizeof(struct smb2_query_directory_req) - 1 - 4); | |
1974 | req->FileNameLength = cpu_to_le16(len); | |
1975 | /* | |
1976 | * BB could be 30 bytes or so longer if we used SMB2 specific | |
1977 | * buffer lengths, but this is safe and close enough. | |
1978 | */ | |
1979 | output_size = min_t(unsigned int, output_size, server->maxBuf); | |
1980 | output_size = min_t(unsigned int, output_size, 2 << 15); | |
1981 | req->OutputBufferLength = cpu_to_le32(output_size); | |
1982 | ||
1983 | iov[0].iov_base = (char *)req; | |
1984 | /* 4 for RFC1001 length and 1 for Buffer */ | |
1985 | iov[0].iov_len = get_rfc1002_length(req) + 4 - 1; | |
1986 | ||
1987 | iov[1].iov_base = (char *)(req->Buffer); | |
1988 | iov[1].iov_len = len; | |
1989 | ||
1990 | inc_rfc1001_len(req, len - 1 /* Buffer */); | |
1991 | ||
1992 | rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, 0); | |
e5d04887 PS |
1993 | rsp = (struct smb2_query_directory_rsp *)iov[0].iov_base; |
1994 | ||
d324f08d PS |
1995 | if (rc) { |
1996 | cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE); | |
1997 | goto qdir_exit; | |
1998 | } | |
d324f08d PS |
1999 | |
2000 | rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset), | |
2001 | le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr, | |
2002 | info_buf_size); | |
2003 | if (rc) | |
2004 | goto qdir_exit; | |
2005 | ||
2006 | srch_inf->unicode = true; | |
2007 | ||
2008 | if (srch_inf->ntwrk_buf_start) { | |
2009 | if (srch_inf->smallBuf) | |
2010 | cifs_small_buf_release(srch_inf->ntwrk_buf_start); | |
2011 | else | |
2012 | cifs_buf_release(srch_inf->ntwrk_buf_start); | |
2013 | } | |
2014 | srch_inf->ntwrk_buf_start = (char *)rsp; | |
2015 | srch_inf->srch_entries_start = srch_inf->last_entry = 4 /* rfclen */ + | |
2016 | (char *)&rsp->hdr + le16_to_cpu(rsp->OutputBufferOffset); | |
2017 | /* 4 for rfc1002 length field */ | |
2018 | end_of_smb = get_rfc1002_length(rsp) + 4 + (char *)&rsp->hdr; | |
2019 | srch_inf->entries_in_buffer = | |
2020 | num_entries(srch_inf->srch_entries_start, end_of_smb, | |
2021 | &srch_inf->last_entry, info_buf_size); | |
2022 | srch_inf->index_of_last_entry += srch_inf->entries_in_buffer; | |
f96637be JP |
2023 | cifs_dbg(FYI, "num entries %d last_index %lld srch start %p srch end %p\n", |
2024 | srch_inf->entries_in_buffer, srch_inf->index_of_last_entry, | |
2025 | srch_inf->srch_entries_start, srch_inf->last_entry); | |
d324f08d PS |
2026 | if (resp_buftype == CIFS_LARGE_BUFFER) |
2027 | srch_inf->smallBuf = false; | |
2028 | else if (resp_buftype == CIFS_SMALL_BUFFER) | |
2029 | srch_inf->smallBuf = true; | |
2030 | else | |
f96637be | 2031 | cifs_dbg(VFS, "illegal search buffer type\n"); |
d324f08d PS |
2032 | |
2033 | if (rsp->hdr.Status == STATUS_NO_MORE_FILES) | |
2034 | srch_inf->endOfSearch = 1; | |
2035 | else | |
2036 | srch_inf->endOfSearch = 0; | |
2037 | ||
2038 | return rc; | |
2039 | ||
2040 | qdir_exit: | |
2041 | free_rsp_buf(resp_buftype, rsp); | |
2042 | return rc; | |
2043 | } | |
2044 | ||
35143eb5 PS |
2045 | static int |
2046 | send_set_info(const unsigned int xid, struct cifs_tcon *tcon, | |
c839ff24 | 2047 | u64 persistent_fid, u64 volatile_fid, u32 pid, int info_class, |
35143eb5 PS |
2048 | unsigned int num, void **data, unsigned int *size) |
2049 | { | |
2050 | struct smb2_set_info_req *req; | |
2051 | struct smb2_set_info_rsp *rsp = NULL; | |
2052 | struct kvec *iov; | |
2053 | int rc = 0; | |
2054 | int resp_buftype; | |
2055 | unsigned int i; | |
2056 | struct TCP_Server_Info *server; | |
2057 | struct cifs_ses *ses = tcon->ses; | |
2058 | ||
2059 | if (ses && (ses->server)) | |
2060 | server = ses->server; | |
2061 | else | |
2062 | return -EIO; | |
2063 | ||
2064 | if (!num) | |
2065 | return -EINVAL; | |
2066 | ||
2067 | iov = kmalloc(sizeof(struct kvec) * num, GFP_KERNEL); | |
2068 | if (!iov) | |
2069 | return -ENOMEM; | |
2070 | ||
2071 | rc = small_smb2_init(SMB2_SET_INFO, tcon, (void **) &req); | |
2072 | if (rc) { | |
2073 | kfree(iov); | |
2074 | return rc; | |
2075 | } | |
2076 | ||
c839ff24 PS |
2077 | req->hdr.ProcessId = cpu_to_le32(pid); |
2078 | ||
35143eb5 PS |
2079 | req->InfoType = SMB2_O_INFO_FILE; |
2080 | req->FileInfoClass = info_class; | |
2081 | req->PersistentFileId = persistent_fid; | |
2082 | req->VolatileFileId = volatile_fid; | |
2083 | ||
2084 | /* 4 for RFC1001 length and 1 for Buffer */ | |
2085 | req->BufferOffset = | |
2086 | cpu_to_le16(sizeof(struct smb2_set_info_req) - 1 - 4); | |
2087 | req->BufferLength = cpu_to_le32(*size); | |
2088 | ||
2089 | inc_rfc1001_len(req, *size - 1 /* Buffer */); | |
2090 | ||
2091 | memcpy(req->Buffer, *data, *size); | |
2092 | ||
2093 | iov[0].iov_base = (char *)req; | |
2094 | /* 4 for RFC1001 length */ | |
2095 | iov[0].iov_len = get_rfc1002_length(req) + 4; | |
2096 | ||
2097 | for (i = 1; i < num; i++) { | |
2098 | inc_rfc1001_len(req, size[i]); | |
2099 | le32_add_cpu(&req->BufferLength, size[i]); | |
2100 | iov[i].iov_base = (char *)data[i]; | |
2101 | iov[i].iov_len = size[i]; | |
2102 | } | |
2103 | ||
2104 | rc = SendReceive2(xid, ses, iov, num, &resp_buftype, 0); | |
2105 | rsp = (struct smb2_set_info_rsp *)iov[0].iov_base; | |
2106 | ||
2107 | if (rc != 0) { | |
2108 | cifs_stats_fail_inc(tcon, SMB2_SET_INFO_HE); | |
2109 | goto out; | |
2110 | } | |
35143eb5 PS |
2111 | out: |
2112 | free_rsp_buf(resp_buftype, rsp); | |
2113 | kfree(iov); | |
2114 | return rc; | |
2115 | } | |
2116 | ||
2117 | int | |
2118 | SMB2_rename(const unsigned int xid, struct cifs_tcon *tcon, | |
2119 | u64 persistent_fid, u64 volatile_fid, __le16 *target_file) | |
2120 | { | |
2121 | struct smb2_file_rename_info info; | |
2122 | void **data; | |
2123 | unsigned int size[2]; | |
2124 | int rc; | |
2125 | int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX)); | |
2126 | ||
2127 | data = kmalloc(sizeof(void *) * 2, GFP_KERNEL); | |
2128 | if (!data) | |
2129 | return -ENOMEM; | |
2130 | ||
2131 | info.ReplaceIfExists = 1; /* 1 = replace existing target with new */ | |
2132 | /* 0 = fail if target already exists */ | |
2133 | info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */ | |
2134 | info.FileNameLength = cpu_to_le32(len); | |
2135 | ||
2136 | data[0] = &info; | |
2137 | size[0] = sizeof(struct smb2_file_rename_info); | |
2138 | ||
2139 | data[1] = target_file; | |
2140 | size[1] = len + 2 /* null */; | |
2141 | ||
2142 | rc = send_set_info(xid, tcon, persistent_fid, volatile_fid, | |
c839ff24 PS |
2143 | current->tgid, FILE_RENAME_INFORMATION, 2, data, |
2144 | size); | |
35143eb5 PS |
2145 | kfree(data); |
2146 | return rc; | |
2147 | } | |
568798cc PS |
2148 | |
2149 | int | |
2150 | SMB2_set_hardlink(const unsigned int xid, struct cifs_tcon *tcon, | |
2151 | u64 persistent_fid, u64 volatile_fid, __le16 *target_file) | |
2152 | { | |
2153 | struct smb2_file_link_info info; | |
2154 | void **data; | |
2155 | unsigned int size[2]; | |
2156 | int rc; | |
2157 | int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX)); | |
2158 | ||
2159 | data = kmalloc(sizeof(void *) * 2, GFP_KERNEL); | |
2160 | if (!data) | |
2161 | return -ENOMEM; | |
2162 | ||
2163 | info.ReplaceIfExists = 0; /* 1 = replace existing link with new */ | |
2164 | /* 0 = fail if link already exists */ | |
2165 | info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */ | |
2166 | info.FileNameLength = cpu_to_le32(len); | |
2167 | ||
2168 | data[0] = &info; | |
2169 | size[0] = sizeof(struct smb2_file_link_info); | |
2170 | ||
2171 | data[1] = target_file; | |
2172 | size[1] = len + 2 /* null */; | |
2173 | ||
2174 | rc = send_set_info(xid, tcon, persistent_fid, volatile_fid, | |
c839ff24 | 2175 | current->tgid, FILE_LINK_INFORMATION, 2, data, size); |
568798cc PS |
2176 | kfree(data); |
2177 | return rc; | |
2178 | } | |
c839ff24 PS |
2179 | |
2180 | int | |
2181 | SMB2_set_eof(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, | |
2182 | u64 volatile_fid, u32 pid, __le64 *eof) | |
2183 | { | |
2184 | struct smb2_file_eof_info info; | |
2185 | void *data; | |
2186 | unsigned int size; | |
2187 | ||
2188 | info.EndOfFile = *eof; | |
2189 | ||
2190 | data = &info; | |
2191 | size = sizeof(struct smb2_file_eof_info); | |
2192 | ||
2193 | return send_set_info(xid, tcon, persistent_fid, volatile_fid, pid, | |
2194 | FILE_END_OF_FILE_INFORMATION, 1, &data, &size); | |
2195 | } | |
1feeaac7 PS |
2196 | |
2197 | int | |
2198 | SMB2_set_info(const unsigned int xid, struct cifs_tcon *tcon, | |
2199 | u64 persistent_fid, u64 volatile_fid, FILE_BASIC_INFO *buf) | |
2200 | { | |
2201 | unsigned int size; | |
2202 | size = sizeof(FILE_BASIC_INFO); | |
2203 | return send_set_info(xid, tcon, persistent_fid, volatile_fid, | |
2204 | current->tgid, FILE_BASIC_INFORMATION, 1, | |
2205 | (void **)&buf, &size); | |
2206 | } | |
983c88a4 PS |
2207 | |
2208 | int | |
2209 | SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon, | |
2210 | const u64 persistent_fid, const u64 volatile_fid, | |
2211 | __u8 oplock_level) | |
2212 | { | |
2213 | int rc; | |
2214 | struct smb2_oplock_break *req = NULL; | |
2215 | ||
f96637be | 2216 | cifs_dbg(FYI, "SMB2_oplock_break\n"); |
983c88a4 PS |
2217 | rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req); |
2218 | ||
2219 | if (rc) | |
2220 | return rc; | |
2221 | ||
2222 | req->VolatileFid = volatile_fid; | |
2223 | req->PersistentFid = persistent_fid; | |
2224 | req->OplockLevel = oplock_level; | |
2225 | req->hdr.CreditRequest = cpu_to_le16(1); | |
2226 | ||
2227 | rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, CIFS_OBREAK_OP); | |
2228 | /* SMB2 buffer freed by function above */ | |
2229 | ||
2230 | if (rc) { | |
2231 | cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE); | |
f96637be | 2232 | cifs_dbg(FYI, "Send error in Oplock Break = %d\n", rc); |
983c88a4 PS |
2233 | } |
2234 | ||
2235 | return rc; | |
2236 | } | |
6fc05c25 PS |
2237 | |
2238 | static void | |
2239 | copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info *pfs_inf, | |
2240 | struct kstatfs *kst) | |
2241 | { | |
2242 | kst->f_bsize = le32_to_cpu(pfs_inf->BytesPerSector) * | |
2243 | le32_to_cpu(pfs_inf->SectorsPerAllocationUnit); | |
2244 | kst->f_blocks = le64_to_cpu(pfs_inf->TotalAllocationUnits); | |
2245 | kst->f_bfree = le64_to_cpu(pfs_inf->ActualAvailableAllocationUnits); | |
2246 | kst->f_bavail = le64_to_cpu(pfs_inf->CallerAvailableAllocationUnits); | |
2247 | return; | |
2248 | } | |
2249 | ||
2250 | static int | |
2251 | build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon, int level, | |
2252 | int outbuf_len, u64 persistent_fid, u64 volatile_fid) | |
2253 | { | |
2254 | int rc; | |
2255 | struct smb2_query_info_req *req; | |
2256 | ||
f96637be | 2257 | cifs_dbg(FYI, "Query FSInfo level %d\n", level); |
6fc05c25 PS |
2258 | |
2259 | if ((tcon->ses == NULL) || (tcon->ses->server == NULL)) | |
2260 | return -EIO; | |
2261 | ||
2262 | rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req); | |
2263 | if (rc) | |
2264 | return rc; | |
2265 | ||
2266 | req->InfoType = SMB2_O_INFO_FILESYSTEM; | |
2267 | req->FileInfoClass = level; | |
2268 | req->PersistentFileId = persistent_fid; | |
2269 | req->VolatileFileId = volatile_fid; | |
2270 | /* 4 for rfc1002 length field and 1 for pad */ | |
2271 | req->InputBufferOffset = | |
2272 | cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4); | |
2273 | req->OutputBufferLength = cpu_to_le32( | |
2274 | outbuf_len + sizeof(struct smb2_query_info_rsp) - 1 - 4); | |
2275 | ||
2276 | iov->iov_base = (char *)req; | |
2277 | /* 4 for rfc1002 length field */ | |
2278 | iov->iov_len = get_rfc1002_length(req) + 4; | |
2279 | return 0; | |
2280 | } | |
2281 | ||
2282 | int | |
2283 | SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon, | |
2284 | u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata) | |
2285 | { | |
2286 | struct smb2_query_info_rsp *rsp = NULL; | |
2287 | struct kvec iov; | |
2288 | int rc = 0; | |
2289 | int resp_buftype; | |
2290 | struct cifs_ses *ses = tcon->ses; | |
2291 | struct smb2_fs_full_size_info *info = NULL; | |
2292 | ||
2293 | rc = build_qfs_info_req(&iov, tcon, FS_FULL_SIZE_INFORMATION, | |
2294 | sizeof(struct smb2_fs_full_size_info), | |
2295 | persistent_fid, volatile_fid); | |
2296 | if (rc) | |
2297 | return rc; | |
2298 | ||
2299 | rc = SendReceive2(xid, ses, &iov, 1, &resp_buftype, 0); | |
2300 | if (rc) { | |
2301 | cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE); | |
2302 | goto qinf_exit; | |
2303 | } | |
2304 | rsp = (struct smb2_query_info_rsp *)iov.iov_base; | |
2305 | ||
2306 | info = (struct smb2_fs_full_size_info *)(4 /* RFC1001 len */ + | |
2307 | le16_to_cpu(rsp->OutputBufferOffset) + (char *)&rsp->hdr); | |
2308 | rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset), | |
2309 | le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr, | |
2310 | sizeof(struct smb2_fs_full_size_info)); | |
2311 | if (!rc) | |
2312 | copy_fs_info_to_kstatfs(info, fsdata); | |
2313 | ||
2314 | qinf_exit: | |
2315 | free_rsp_buf(resp_buftype, iov.iov_base); | |
2316 | return rc; | |
2317 | } | |
f7ba7fe6 PS |
2318 | |
2319 | int | |
2320 | smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon, | |
2321 | const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid, | |
2322 | const __u32 num_lock, struct smb2_lock_element *buf) | |
2323 | { | |
2324 | int rc = 0; | |
2325 | struct smb2_lock_req *req = NULL; | |
2326 | struct kvec iov[2]; | |
2327 | int resp_buf_type; | |
2328 | unsigned int count; | |
2329 | ||
f96637be | 2330 | cifs_dbg(FYI, "smb2_lockv num lock %d\n", num_lock); |
f7ba7fe6 PS |
2331 | |
2332 | rc = small_smb2_init(SMB2_LOCK, tcon, (void **) &req); | |
2333 | if (rc) | |
2334 | return rc; | |
2335 | ||
2336 | req->hdr.ProcessId = cpu_to_le32(pid); | |
2337 | req->LockCount = cpu_to_le16(num_lock); | |
2338 | ||
2339 | req->PersistentFileId = persist_fid; | |
2340 | req->VolatileFileId = volatile_fid; | |
2341 | ||
2342 | count = num_lock * sizeof(struct smb2_lock_element); | |
2343 | inc_rfc1001_len(req, count - sizeof(struct smb2_lock_element)); | |
2344 | ||
2345 | iov[0].iov_base = (char *)req; | |
2346 | /* 4 for rfc1002 length field and count for all locks */ | |
2347 | iov[0].iov_len = get_rfc1002_length(req) + 4 - count; | |
2348 | iov[1].iov_base = (char *)buf; | |
2349 | iov[1].iov_len = count; | |
2350 | ||
2351 | cifs_stats_inc(&tcon->stats.cifs_stats.num_locks); | |
2352 | rc = SendReceive2(xid, tcon->ses, iov, 2, &resp_buf_type, CIFS_NO_RESP); | |
2353 | if (rc) { | |
f96637be | 2354 | cifs_dbg(FYI, "Send error in smb2_lockv = %d\n", rc); |
f7ba7fe6 PS |
2355 | cifs_stats_fail_inc(tcon, SMB2_LOCK_HE); |
2356 | } | |
2357 | ||
2358 | return rc; | |
2359 | } | |
2360 | ||
2361 | int | |
2362 | SMB2_lock(const unsigned int xid, struct cifs_tcon *tcon, | |
2363 | const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid, | |
2364 | const __u64 length, const __u64 offset, const __u32 lock_flags, | |
2365 | const bool wait) | |
2366 | { | |
2367 | struct smb2_lock_element lock; | |
2368 | ||
2369 | lock.Offset = cpu_to_le64(offset); | |
2370 | lock.Length = cpu_to_le64(length); | |
2371 | lock.Flags = cpu_to_le32(lock_flags); | |
2372 | if (!wait && lock_flags != SMB2_LOCKFLAG_UNLOCK) | |
2373 | lock.Flags |= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY); | |
2374 | ||
2375 | return smb2_lockv(xid, tcon, persist_fid, volatile_fid, pid, 1, &lock); | |
2376 | } | |
0822f514 PS |
2377 | |
2378 | int | |
2379 | SMB2_lease_break(const unsigned int xid, struct cifs_tcon *tcon, | |
2380 | __u8 *lease_key, const __le32 lease_state) | |
2381 | { | |
2382 | int rc; | |
2383 | struct smb2_lease_ack *req = NULL; | |
2384 | ||
f96637be | 2385 | cifs_dbg(FYI, "SMB2_lease_break\n"); |
0822f514 PS |
2386 | rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req); |
2387 | ||
2388 | if (rc) | |
2389 | return rc; | |
2390 | ||
2391 | req->hdr.CreditRequest = cpu_to_le16(1); | |
2392 | req->StructureSize = cpu_to_le16(36); | |
2393 | inc_rfc1001_len(req, 12); | |
2394 | ||
2395 | memcpy(req->LeaseKey, lease_key, 16); | |
2396 | req->LeaseState = lease_state; | |
2397 | ||
2398 | rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, CIFS_OBREAK_OP); | |
2399 | /* SMB2 buffer freed by function above */ | |
2400 | ||
2401 | if (rc) { | |
2402 | cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE); | |
f96637be | 2403 | cifs_dbg(FYI, "Send error in Lease Break = %d\n", rc); |
0822f514 PS |
2404 | } |
2405 | ||
2406 | return rc; | |
2407 | } |