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Pavel Shilovskyec2e4522011-12-27 16:12:43 +04001/*
2 * fs/cifs/smb2pdu.c
3 *
Steve French2b80d042013-06-23 18:43:37 -05004 * Copyright (C) International Business Machines Corp., 2009, 2013
Pavel Shilovskyec2e4522011-12-27 16:12:43 +04005 * 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>
Pavel Shilovsky09a47072012-09-18 16:20:29 -070034#include <linux/task_io_accounting_ops.h>
Pavel Shilovskyec2e4522011-12-27 16:12:43 +040035#include <linux/uaccess.h>
Pavel Shilovsky33319142012-09-18 16:20:29 -070036#include <linux/pagemap.h>
Pavel Shilovskyec2e4522011-12-27 16:12:43 +040037#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"
Pavel Shilovsky09a47072012-09-18 16:20:29 -070047#include "smb2glob.h"
Pavel Shilovskyd324f08d2012-09-18 16:20:33 -070048#include "cifspdu.h"
Pavel Shilovskyec2e4522011-12-27 16:12:43 +040049
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 */
57static 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
80static void
81smb2_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
Steve French2b80d042013-06-23 18:43:37 -0500111 /* 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 */
Steve French84ceeb92013-06-26 17:52:17 -0500114 if ((tcon->ses) &&
115 (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
Steve French2b80d042013-06-23 18:43:37 -0500116 hdr->CreditCharge = cpu_to_le16(1);
117 /* else CreditCharge MBZ */
118
Pavel Shilovskyec2e4522011-12-27 16:12:43 +0400119 hdr->TreeId = tcon->tid;
120 /* Uid is not converted */
121 if (tcon->ses)
122 hdr->SessionId = tcon->ses->Suid;
Steve Frenchf87ab882013-06-26 19:14:55 -0500123
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
Jeff Layton38d77c52013-05-26 07:01:00 -0400137 if (tcon->ses && tcon->ses->server && tcon->ses->server->sign)
Pavel Shilovsky3c1bf7e2012-09-18 16:20:30 -0700138 hdr->Flags |= SMB2_FLAGS_SIGNED;
Pavel Shilovskyec2e4522011-12-27 16:12:43 +0400139out:
140 pdu->StructureSize2 = cpu_to_le16(parmsize);
141 return;
142}
143
144static int
145smb2_reconnect(__le16 smb2_command, struct cifs_tcon *tcon)
146{
147 int rc = 0;
Pavel Shilovskyaa24d1e2011-12-27 16:23:34 +0400148 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)) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500172 cifs_dbg(FYI, "can not send cmd %d while umounting\n",
173 smb2_command);
Pavel Shilovskyaa24d1e2011-12-27 16:23:34 +0400174 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) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500217 cifs_dbg(FYI, "gave up waiting on reconnect in smb_init\n");
Pavel Shilovskyaa24d1e2011-12-27 16:23:34 +0400218 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);
Joe Perchesf96637b2013-05-04 22:12:25 -0500244 cifs_dbg(FYI, "reconnect tcon rc = %d\n", rc);
Pavel Shilovskyaa24d1e2011-12-27 16:23:34 +0400245 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 */
252out:
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);
Pavel Shilovskyec2e4522011-12-27 16:12:43 +0400274 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 */
282static int
283small_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
Pavel Shilovskyec2e4522011-12-27 16:12:43 +0400303 uint16_t com_code = le16_to_cpu(smb2_command);
304 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_sent[com_code]);
Pavel Shilovskyec2e4522011-12-27 16:12:43 +0400305#endif
306 cifs_stats_inc(&tcon->num_smbs_sent);
307 }
308
309 return rc;
310}
311
312static void
313free_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
Pavel Shilovskyec2e4522011-12-27 16:12:43 +0400321
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
337int
338SMB2_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;
Jeff Layton3534b852013-05-24 07:41:01 -0400345 struct TCP_Server_Info *server = ses->server;
Pavel Shilovskyec2e4522011-12-27 16:12:43 +0400346 int blob_offset, blob_length;
347 char *security_blob;
348 int flags = CIFS_NEG_OP;
349
Joe Perchesf96637b2013-05-04 22:12:25 -0500350 cifs_dbg(FYI, "Negotiate protocol\n");
Pavel Shilovskyec2e4522011-12-27 16:12:43 +0400351
Jeff Layton3534b852013-05-24 07:41:01 -0400352 if (!server) {
353 WARN(1, "%s: server is NULL!\n", __func__);
354 return -EIO;
Pavel Shilovskyec2e4522011-12-27 16:12:43 +0400355 }
356
357 rc = small_smb2_init(SMB2_NEGOTIATE, NULL, (void **) &req);
358 if (rc)
359 return rc;
360
Pavel Shilovskyec2e4522011-12-27 16:12:43 +0400361 req->hdr.SessionId = 0;
362
Steve Frenche4aa25e2012-10-01 12:26:22 -0500363 req->Dialects[0] = cpu_to_le16(ses->server->vals->protocol_id);
Pavel Shilovskyec2e4522011-12-27 16:12:43 +0400364
Steve Frenche4aa25e2012-10-01 12:26:22 -0500365 req->DialectCount = cpu_to_le16(1); /* One vers= at a time for now */
366 inc_rfc1001_len(req, 2);
Pavel Shilovskyec2e4522011-12-27 16:12:43 +0400367
368 /* only one of SMB2 signing flags may be set in SMB2 request */
Jeff Layton38d77c52013-05-26 07:01:00 -0400369 if (ses->sign)
Steve French9cd2e622013-06-12 19:59:03 -0500370 req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
Jeff Layton38d77c52013-05-26 07:01:00 -0400371 else if (global_secflags & CIFSSEC_MAY_SIGN)
Steve French9cd2e622013-06-12 19:59:03 -0500372 req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
Jeff Layton38d77c52013-05-26 07:01:00 -0400373 else
374 req->SecurityMode = 0;
Pavel Shilovskyec2e4522011-12-27 16:12:43 +0400375
Steve Frenche4aa25e2012-10-01 12:26:22 -0500376 req->Capabilities = cpu_to_le32(ses->server->vals->req_capabilities);
Pavel Shilovskyec2e4522011-12-27 16:12:43 +0400377
Pavel Shilovskyb8c32db2012-09-19 06:22:44 -0700378 memcpy(req->ClientGUID, cifs_client_guid, SMB2_CLIENT_GUID_SIZE);
379
Pavel Shilovskyec2e4522011-12-27 16:12:43 +0400380 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
Joe Perchesf96637b2013-05-04 22:12:25 -0500394 cifs_dbg(FYI, "mode 0x%x\n", rsp->SecurityMode);
Pavel Shilovskyec2e4522011-12-27 16:12:43 +0400395
Steve Frenche4aa25e2012-10-01 12:26:22 -0500396 /* 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))
Joe Perchesf96637b2013-05-04 22:12:25 -0500399 cifs_dbg(FYI, "negotiated smb2.0 dialect\n");
Steve Frenche4aa25e2012-10-01 12:26:22 -0500400 else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID))
Joe Perchesf96637b2013-05-04 22:12:25 -0500401 cifs_dbg(FYI, "negotiated smb2.1 dialect\n");
Steve Frenche4aa25e2012-10-01 12:26:22 -0500402 else if (rsp->DialectRevision == cpu_to_le16(SMB30_PROT_ID))
Joe Perchesf96637b2013-05-04 22:12:25 -0500403 cifs_dbg(FYI, "negotiated smb3.0 dialect\n");
Steve French20b6d8b2013-06-12 22:48:41 -0500404 else if (rsp->DialectRevision == cpu_to_le16(SMB302_PROT_ID))
405 cifs_dbg(FYI, "negotiated smb3.02 dialect\n");
Pavel Shilovskyec2e4522011-12-27 16:12:43 +0400406 else {
Joe Perchesf96637b2013-05-04 22:12:25 -0500407 cifs_dbg(VFS, "Illegal dialect returned by server %d\n",
408 le16_to_cpu(rsp->DialectRevision));
Pavel Shilovskyec2e4522011-12-27 16:12:43 +0400409 rc = -EIO;
410 goto neg_exit;
411 }
412 server->dialect = le16_to_cpu(rsp->DialectRevision);
413
Jeff Laytone598d1d82013-05-26 07:00:59 -0400414 /* SMB2 only has an extended negflavor */
415 server->negflavor = CIFS_NEGFLAVOR_EXTENDED;
Pavel Shilovsky2365c4e2014-02-14 13:31:02 +0400416 /* set it to the maximum buffer size value we can send with 1 credit */
417 server->maxBuf = min_t(unsigned int, le32_to_cpu(rsp->MaxTransactSize),
418 SMB2_MAX_BUFFER_SIZE);
Pavel Shilovskyec2e4522011-12-27 16:12:43 +0400419 server->max_read = le32_to_cpu(rsp->MaxReadSize);
420 server->max_write = le32_to_cpu(rsp->MaxWriteSize);
421 /* BB Do we need to validate the SecurityMode? */
422 server->sec_mode = le16_to_cpu(rsp->SecurityMode);
423 server->capabilities = le32_to_cpu(rsp->Capabilities);
Pavel Shilovsky29e20f92012-07-13 13:58:14 +0400424 /* Internal types */
425 server->capabilities |= SMB2_NT_FIND | SMB2_LARGE_FILES;
Pavel Shilovskyec2e4522011-12-27 16:12:43 +0400426
427 security_blob = smb2_get_data_area_len(&blob_offset, &blob_length,
428 &rsp->hdr);
Steve French5d875cc2013-06-25 15:33:41 -0500429 /*
430 * See MS-SMB2 section 2.2.4: if no blob, client picks default which
431 * for us will be
432 * ses->sectype = RawNTLMSSP;
433 * but for time being this is our only auth choice so doesn't matter.
434 * We just found a server which sets blob length to zero expecting raw.
435 */
436 if (blob_length == 0)
437 cifs_dbg(FYI, "missing security blob on negprot\n");
Pavel Shilovsky3c1bf7e2012-09-18 16:20:30 -0700438
Jeff Layton38d77c52013-05-26 07:01:00 -0400439 rc = cifs_enable_signing(server, ses->sign);
Pavel Shilovskyec2e4522011-12-27 16:12:43 +0400440#ifdef CONFIG_SMB2_ASN1 /* BB REMOVEME when updated asn1.c ready */
Jeff Layton9ddec562013-05-26 07:00:58 -0400441 if (rc)
442 goto neg_exit;
Steve French5d875cc2013-06-25 15:33:41 -0500443 if (blob_length)
444 rc = decode_neg_token_init(security_blob, blob_length,
Pavel Shilovskyec2e4522011-12-27 16:12:43 +0400445 &server->sec_type);
446 if (rc == 1)
447 rc = 0;
448 else if (rc == 0) {
449 rc = -EIO;
450 goto neg_exit;
451 }
452#endif
453
454neg_exit:
455 free_rsp_buf(resp_buftype, rsp);
456 return rc;
457}
Pavel Shilovsky5478f9b2011-12-27 16:22:00 +0400458
Steve Frenchff1c0382013-11-19 23:44:46 -0600459int smb3_validate_negotiate(const unsigned int xid, struct cifs_tcon *tcon)
460{
461 int rc = 0;
462 struct validate_negotiate_info_req vneg_inbuf;
463 struct validate_negotiate_info_rsp *pneg_rsp;
464 u32 rsplen;
465
466 cifs_dbg(FYI, "validate negotiate\n");
467
468 /*
469 * validation ioctl must be signed, so no point sending this if we
470 * can not sign it. We could eventually change this to selectively
471 * sign just this, the first and only signed request on a connection.
472 * This is good enough for now since a user who wants better security
473 * would also enable signing on the mount. Having validation of
474 * negotiate info for signed connections helps reduce attack vectors
475 */
476 if (tcon->ses->server->sign == false)
477 return 0; /* validation requires signing */
478
479 vneg_inbuf.Capabilities =
480 cpu_to_le32(tcon->ses->server->vals->req_capabilities);
481 memcpy(vneg_inbuf.Guid, cifs_client_guid, SMB2_CLIENT_GUID_SIZE);
482
483 if (tcon->ses->sign)
484 vneg_inbuf.SecurityMode =
485 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
486 else if (global_secflags & CIFSSEC_MAY_SIGN)
487 vneg_inbuf.SecurityMode =
488 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
489 else
490 vneg_inbuf.SecurityMode = 0;
491
492 vneg_inbuf.DialectCount = cpu_to_le16(1);
493 vneg_inbuf.Dialects[0] =
494 cpu_to_le16(tcon->ses->server->vals->protocol_id);
495
496 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
497 FSCTL_VALIDATE_NEGOTIATE_INFO, true /* is_fsctl */,
498 (char *)&vneg_inbuf, sizeof(struct validate_negotiate_info_req),
499 (char **)&pneg_rsp, &rsplen);
500
501 if (rc != 0) {
502 cifs_dbg(VFS, "validate protocol negotiate failed: %d\n", rc);
503 return -EIO;
504 }
505
506 if (rsplen != sizeof(struct validate_negotiate_info_rsp)) {
507 cifs_dbg(VFS, "invalid size of protocol negotiate response\n");
508 return -EIO;
509 }
510
511 /* check validate negotiate info response matches what we got earlier */
512 if (pneg_rsp->Dialect !=
513 cpu_to_le16(tcon->ses->server->vals->protocol_id))
514 goto vneg_out;
515
516 if (pneg_rsp->SecurityMode != cpu_to_le16(tcon->ses->server->sec_mode))
517 goto vneg_out;
518
519 /* do not validate server guid because not saved at negprot time yet */
520
521 if ((le32_to_cpu(pneg_rsp->Capabilities) | SMB2_NT_FIND |
522 SMB2_LARGE_FILES) != tcon->ses->server->capabilities)
523 goto vneg_out;
524
525 /* validate negotiate successful */
526 cifs_dbg(FYI, "validate negotiate info successful\n");
527 return 0;
528
529vneg_out:
530 cifs_dbg(VFS, "protocol revalidation - security settings mismatch\n");
531 return -EIO;
532}
533
Pavel Shilovsky5478f9b2011-12-27 16:22:00 +0400534int
535SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses,
536 const struct nls_table *nls_cp)
537{
538 struct smb2_sess_setup_req *req;
539 struct smb2_sess_setup_rsp *rsp = NULL;
540 struct kvec iov[2];
541 int rc = 0;
542 int resp_buftype;
543 __le32 phase = NtLmNegotiate; /* NTLMSSP, if needed, is multistage */
Jeff Layton3534b852013-05-24 07:41:01 -0400544 struct TCP_Server_Info *server = ses->server;
Pavel Shilovsky5478f9b2011-12-27 16:22:00 +0400545 u16 blob_length = 0;
546 char *security_blob;
547 char *ntlmssp_blob = NULL;
548 bool use_spnego = false; /* else use raw ntlmssp */
549
Joe Perchesf96637b2013-05-04 22:12:25 -0500550 cifs_dbg(FYI, "Session Setup\n");
Pavel Shilovsky5478f9b2011-12-27 16:22:00 +0400551
Jeff Layton3534b852013-05-24 07:41:01 -0400552 if (!server) {
553 WARN(1, "%s: server is NULL!\n", __func__);
554 return -EIO;
Pavel Shilovsky5478f9b2011-12-27 16:22:00 +0400555 }
556
557 /*
Shirish Pargaonkard4e63bd2013-08-29 08:35:09 -0500558 * If we are here due to reconnect, free per-smb session key
559 * in case signing was required.
560 */
561 kfree(ses->auth_key.response);
562 ses->auth_key.response = NULL;
563
564 /*
Pavel Shilovsky5478f9b2011-12-27 16:22:00 +0400565 * If memory allocation is successful, caller of this function
566 * frees it.
567 */
568 ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL);
569 if (!ses->ntlmssp)
570 return -ENOMEM;
Shirish Pargaonkar5c234aa2013-08-29 08:35:10 -0500571 ses->ntlmssp->sesskey_per_smbsess = true;
Pavel Shilovsky5478f9b2011-12-27 16:22:00 +0400572
Jeff Layton3f618222013-06-12 19:52:14 -0500573 /* FIXME: allow for other auth types besides NTLMSSP (e.g. krb5) */
574 ses->sectype = RawNTLMSSP;
Pavel Shilovsky5478f9b2011-12-27 16:22:00 +0400575
576ssetup_ntlmssp_authenticate:
577 if (phase == NtLmChallenge)
578 phase = NtLmAuthenticate; /* if ntlmssp, now final phase */
579
580 rc = small_smb2_init(SMB2_SESSION_SETUP, NULL, (void **) &req);
581 if (rc)
582 return rc;
583
Pavel Shilovsky5478f9b2011-12-27 16:22:00 +0400584 req->hdr.SessionId = 0; /* First session, not a reauthenticate */
585 req->VcNumber = 0; /* MBZ */
586 /* to enable echos and oplocks */
587 req->hdr.CreditRequest = cpu_to_le16(3);
588
589 /* only one of SMB2 signing flags may be set in SMB2 request */
Jeff Layton38d77c52013-05-26 07:01:00 -0400590 if (server->sign)
591 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_REQUIRED;
592 else if (global_secflags & CIFSSEC_MAY_SIGN) /* one flag unlike MUST_ */
593 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED;
594 else
595 req->SecurityMode = 0;
Pavel Shilovsky5478f9b2011-12-27 16:22:00 +0400596
Pavel Shilovsky5478f9b2011-12-27 16:22:00 +0400597 req->Capabilities = 0;
598 req->Channel = 0; /* MBZ */
599
600 iov[0].iov_base = (char *)req;
601 /* 4 for rfc1002 length field and 1 for pad */
602 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
603 if (phase == NtLmNegotiate) {
604 ntlmssp_blob = kmalloc(sizeof(struct _NEGOTIATE_MESSAGE),
605 GFP_KERNEL);
606 if (ntlmssp_blob == NULL) {
607 rc = -ENOMEM;
608 goto ssetup_exit;
609 }
610 build_ntlmssp_negotiate_blob(ntlmssp_blob, ses);
611 if (use_spnego) {
612 /* blob_length = build_spnego_ntlmssp_blob(
613 &security_blob,
614 sizeof(struct _NEGOTIATE_MESSAGE),
615 ntlmssp_blob); */
616 /* BB eventually need to add this */
Joe Perchesf96637b2013-05-04 22:12:25 -0500617 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
Pavel Shilovsky5478f9b2011-12-27 16:22:00 +0400618 rc = -EOPNOTSUPP;
619 kfree(ntlmssp_blob);
620 goto ssetup_exit;
621 } else {
622 blob_length = sizeof(struct _NEGOTIATE_MESSAGE);
623 /* with raw NTLMSSP we don't encapsulate in SPNEGO */
624 security_blob = ntlmssp_blob;
625 }
626 } else if (phase == NtLmAuthenticate) {
627 req->hdr.SessionId = ses->Suid;
628 ntlmssp_blob = kzalloc(sizeof(struct _NEGOTIATE_MESSAGE) + 500,
629 GFP_KERNEL);
630 if (ntlmssp_blob == NULL) {
Pavel Shilovsky5478f9b2011-12-27 16:22:00 +0400631 rc = -ENOMEM;
632 goto ssetup_exit;
633 }
634 rc = build_ntlmssp_auth_blob(ntlmssp_blob, &blob_length, ses,
635 nls_cp);
636 if (rc) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500637 cifs_dbg(FYI, "build_ntlmssp_auth_blob failed %d\n",
638 rc);
Pavel Shilovsky5478f9b2011-12-27 16:22:00 +0400639 goto ssetup_exit; /* BB double check error handling */
640 }
641 if (use_spnego) {
642 /* blob_length = build_spnego_ntlmssp_blob(
643 &security_blob,
644 blob_length,
645 ntlmssp_blob); */
Joe Perchesf96637b2013-05-04 22:12:25 -0500646 cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
Pavel Shilovsky5478f9b2011-12-27 16:22:00 +0400647 rc = -EOPNOTSUPP;
648 kfree(ntlmssp_blob);
649 goto ssetup_exit;
650 } else {
651 security_blob = ntlmssp_blob;
652 }
653 } else {
Joe Perchesf96637b2013-05-04 22:12:25 -0500654 cifs_dbg(VFS, "illegal ntlmssp phase\n");
Pavel Shilovsky5478f9b2011-12-27 16:22:00 +0400655 rc = -EIO;
656 goto ssetup_exit;
657 }
658
659 /* Testing shows that buffer offset must be at location of Buffer[0] */
660 req->SecurityBufferOffset =
661 cpu_to_le16(sizeof(struct smb2_sess_setup_req) -
662 1 /* pad */ - 4 /* rfc1001 len */);
663 req->SecurityBufferLength = cpu_to_le16(blob_length);
664 iov[1].iov_base = security_blob;
665 iov[1].iov_len = blob_length;
666
667 inc_rfc1001_len(req, blob_length - 1 /* pad */);
668
669 /* BB add code to build os and lm fields */
670
Steve French6d8b59d2012-12-08 22:36:29 -0600671 rc = SendReceive2(xid, ses, iov, 2, &resp_buftype,
672 CIFS_LOG_ERROR | CIFS_NEG_OP);
Pavel Shilovsky5478f9b2011-12-27 16:22:00 +0400673
674 kfree(security_blob);
675 rsp = (struct smb2_sess_setup_rsp *)iov[0].iov_base;
Pavel Shilovsky4ca3a992012-09-25 11:00:09 +0400676 if (resp_buftype != CIFS_NO_BUFFER &&
677 rsp->hdr.Status == STATUS_MORE_PROCESSING_REQUIRED) {
Pavel Shilovsky5478f9b2011-12-27 16:22:00 +0400678 if (phase != NtLmNegotiate) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500679 cifs_dbg(VFS, "Unexpected more processing error\n");
Pavel Shilovsky5478f9b2011-12-27 16:22:00 +0400680 goto ssetup_exit;
681 }
682 if (offsetof(struct smb2_sess_setup_rsp, Buffer) - 4 !=
Pavel Shilovsky4ca3a992012-09-25 11:00:09 +0400683 le16_to_cpu(rsp->SecurityBufferOffset)) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500684 cifs_dbg(VFS, "Invalid security buffer offset %d\n",
685 le16_to_cpu(rsp->SecurityBufferOffset));
Pavel Shilovsky5478f9b2011-12-27 16:22:00 +0400686 rc = -EIO;
687 goto ssetup_exit;
688 }
689
690 /* NTLMSSP Negotiate sent now processing challenge (response) */
691 phase = NtLmChallenge; /* process ntlmssp challenge */
692 rc = 0; /* MORE_PROCESSING is not an error here but expected */
693 ses->Suid = rsp->hdr.SessionId;
694 rc = decode_ntlmssp_challenge(rsp->Buffer,
695 le16_to_cpu(rsp->SecurityBufferLength), ses);
696 }
697
698 /*
699 * BB eventually add code for SPNEGO decoding of NtlmChallenge blob,
700 * but at least the raw NTLMSSP case works.
701 */
702 /*
703 * No tcon so can't do
704 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
705 */
706 if (rc != 0)
707 goto ssetup_exit;
708
Pavel Shilovsky5478f9b2011-12-27 16:22:00 +0400709 ses->session_flags = le16_to_cpu(rsp->SessionFlags);
Steve French0cbaa532013-11-15 23:50:24 -0600710 if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
711 cifs_dbg(VFS, "SMB3 encryption not supported yet\n");
Pavel Shilovsky5478f9b2011-12-27 16:22:00 +0400712ssetup_exit:
713 free_rsp_buf(resp_buftype, rsp);
714
715 /* if ntlmssp, and negotiate succeeded, proceed to authenticate phase */
716 if ((phase == NtLmChallenge) && (rc == 0))
717 goto ssetup_ntlmssp_authenticate;
Shirish Pargaonkard4e63bd2013-08-29 08:35:09 -0500718
719 if (!rc) {
720 mutex_lock(&server->srv_mutex);
Shirish Pargaonkar32811d22013-08-29 08:35:11 -0500721 if (server->sign && server->ops->generate_signingkey) {
722 rc = server->ops->generate_signingkey(ses);
723 kfree(ses->auth_key.response);
724 ses->auth_key.response = NULL;
725 if (rc) {
726 cifs_dbg(FYI,
727 "SMB3 session key generation failed\n");
728 mutex_unlock(&server->srv_mutex);
729 goto keygen_exit;
730 }
731 }
Shirish Pargaonkard4e63bd2013-08-29 08:35:09 -0500732 if (!server->session_estab) {
733 server->sequence_number = 0x2;
734 server->session_estab = true;
Shirish Pargaonkard4e63bd2013-08-29 08:35:09 -0500735 }
736 mutex_unlock(&server->srv_mutex);
737
738 cifs_dbg(FYI, "SMB2/3 session established successfully\n");
739 spin_lock(&GlobalMid_Lock);
740 ses->status = CifsGood;
741 ses->need_reconnect = false;
742 spin_unlock(&GlobalMid_Lock);
743 }
744
Shirish Pargaonkar32811d22013-08-29 08:35:11 -0500745keygen_exit:
Shirish Pargaonkard4e63bd2013-08-29 08:35:09 -0500746 if (!server->sign) {
747 kfree(ses->auth_key.response);
748 ses->auth_key.response = NULL;
749 }
750 kfree(ses->ntlmssp);
751
Pavel Shilovsky5478f9b2011-12-27 16:22:00 +0400752 return rc;
753}
754
755int
756SMB2_logoff(const unsigned int xid, struct cifs_ses *ses)
757{
758 struct smb2_logoff_req *req; /* response is also trivial struct */
759 int rc = 0;
760 struct TCP_Server_Info *server;
761
Joe Perchesf96637b2013-05-04 22:12:25 -0500762 cifs_dbg(FYI, "disconnect session %p\n", ses);
Pavel Shilovsky5478f9b2011-12-27 16:22:00 +0400763
764 if (ses && (ses->server))
765 server = ses->server;
766 else
767 return -EIO;
768
Shirish Pargaonkareb4c7df2013-10-03 05:44:45 -0500769 /* no need to send SMB logoff if uid already closed due to reconnect */
770 if (ses->need_reconnect)
771 goto smb2_session_already_dead;
772
Pavel Shilovsky5478f9b2011-12-27 16:22:00 +0400773 rc = small_smb2_init(SMB2_LOGOFF, NULL, (void **) &req);
774 if (rc)
775 return rc;
776
777 /* since no tcon, smb2_init can not do this, so do here */
778 req->hdr.SessionId = ses->Suid;
Jeff Layton38d77c52013-05-26 07:01:00 -0400779 if (server->sign)
Pavel Shilovsky3c1bf7e2012-09-18 16:20:30 -0700780 req->hdr.Flags |= SMB2_FLAGS_SIGNED;
Pavel Shilovsky5478f9b2011-12-27 16:22:00 +0400781
782 rc = SendReceiveNoRsp(xid, ses, (char *) &req->hdr, 0);
783 /*
784 * No tcon so can't do
785 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
786 */
Shirish Pargaonkareb4c7df2013-10-03 05:44:45 -0500787
788smb2_session_already_dead:
Pavel Shilovsky5478f9b2011-12-27 16:22:00 +0400789 return rc;
790}
Pavel Shilovskyfaaf9462011-12-27 16:04:00 +0400791
792static inline void cifs_stats_fail_inc(struct cifs_tcon *tcon, uint16_t code)
793{
Pavel Shilovskyd60622e2012-05-28 15:19:39 +0400794 cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_failed[code]);
Pavel Shilovskyfaaf9462011-12-27 16:04:00 +0400795}
796
797#define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
798
Steve Frenchde9f68d2013-11-15 11:26:24 -0600799/* These are similar values to what Windows uses */
800static inline void init_copy_chunk_defaults(struct cifs_tcon *tcon)
801{
802 tcon->max_chunks = 256;
803 tcon->max_bytes_chunk = 1048576;
804 tcon->max_bytes_copy = 16777216;
805}
806
Pavel Shilovskyfaaf9462011-12-27 16:04:00 +0400807int
808SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree,
809 struct cifs_tcon *tcon, const struct nls_table *cp)
810{
811 struct smb2_tree_connect_req *req;
812 struct smb2_tree_connect_rsp *rsp = NULL;
813 struct kvec iov[2];
814 int rc = 0;
815 int resp_buftype;
816 int unc_path_len;
817 struct TCP_Server_Info *server;
818 __le16 *unc_path = NULL;
819
Joe Perchesf96637b2013-05-04 22:12:25 -0500820 cifs_dbg(FYI, "TCON\n");
Pavel Shilovskyfaaf9462011-12-27 16:04:00 +0400821
822 if ((ses->server) && tree)
823 server = ses->server;
824 else
825 return -EIO;
826
827 if (tcon && tcon->bad_network_name)
828 return -ENOENT;
829
830 unc_path = kmalloc(MAX_SHARENAME_LENGTH * 2, GFP_KERNEL);
831 if (unc_path == NULL)
832 return -ENOMEM;
833
834 unc_path_len = cifs_strtoUTF16(unc_path, tree, strlen(tree), cp) + 1;
835 unc_path_len *= 2;
836 if (unc_path_len < 2) {
837 kfree(unc_path);
838 return -EINVAL;
839 }
840
841 rc = small_smb2_init(SMB2_TREE_CONNECT, tcon, (void **) &req);
842 if (rc) {
843 kfree(unc_path);
844 return rc;
845 }
846
847 if (tcon == NULL) {
848 /* since no tcon, smb2_init can not do this, so do here */
849 req->hdr.SessionId = ses->Suid;
850 /* if (ses->server->sec_mode & SECMODE_SIGN_REQUIRED)
851 req->hdr.Flags |= SMB2_FLAGS_SIGNED; */
852 }
853
854 iov[0].iov_base = (char *)req;
855 /* 4 for rfc1002 length field and 1 for pad */
856 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
857
858 /* Testing shows that buffer offset must be at location of Buffer[0] */
859 req->PathOffset = cpu_to_le16(sizeof(struct smb2_tree_connect_req)
860 - 1 /* pad */ - 4 /* do not count rfc1001 len field */);
861 req->PathLength = cpu_to_le16(unc_path_len - 2);
862 iov[1].iov_base = unc_path;
863 iov[1].iov_len = unc_path_len;
864
865 inc_rfc1001_len(req, unc_path_len - 1 /* pad */);
866
867 rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, 0);
868 rsp = (struct smb2_tree_connect_rsp *)iov[0].iov_base;
869
870 if (rc != 0) {
871 if (tcon) {
872 cifs_stats_fail_inc(tcon, SMB2_TREE_CONNECT_HE);
873 tcon->need_reconnect = true;
874 }
875 goto tcon_error_exit;
876 }
877
Pavel Shilovskyfaaf9462011-12-27 16:04:00 +0400878 if (tcon == NULL) {
879 ses->ipc_tid = rsp->hdr.TreeId;
880 goto tcon_exit;
881 }
882
883 if (rsp->ShareType & SMB2_SHARE_TYPE_DISK)
Joe Perchesf96637b2013-05-04 22:12:25 -0500884 cifs_dbg(FYI, "connection to disk share\n");
Pavel Shilovskyfaaf9462011-12-27 16:04:00 +0400885 else if (rsp->ShareType & SMB2_SHARE_TYPE_PIPE) {
886 tcon->ipc = true;
Joe Perchesf96637b2013-05-04 22:12:25 -0500887 cifs_dbg(FYI, "connection to pipe share\n");
Pavel Shilovskyfaaf9462011-12-27 16:04:00 +0400888 } else if (rsp->ShareType & SMB2_SHARE_TYPE_PRINT) {
889 tcon->print = true;
Joe Perchesf96637b2013-05-04 22:12:25 -0500890 cifs_dbg(FYI, "connection to printer\n");
Pavel Shilovskyfaaf9462011-12-27 16:04:00 +0400891 } else {
Joe Perchesf96637b2013-05-04 22:12:25 -0500892 cifs_dbg(VFS, "unknown share type %d\n", rsp->ShareType);
Pavel Shilovskyfaaf9462011-12-27 16:04:00 +0400893 rc = -EOPNOTSUPP;
894 goto tcon_error_exit;
895 }
896
897 tcon->share_flags = le32_to_cpu(rsp->ShareFlags);
Steve French769ee6a2013-06-19 14:15:30 -0500898 tcon->capabilities = rsp->Capabilities; /* we keep caps little endian */
Pavel Shilovskyfaaf9462011-12-27 16:04:00 +0400899 tcon->maximal_access = le32_to_cpu(rsp->MaximalAccess);
900 tcon->tidStatus = CifsGood;
901 tcon->need_reconnect = false;
902 tcon->tid = rsp->hdr.TreeId;
Zhao Hongjiang46b51d02013-06-24 01:57:47 -0500903 strlcpy(tcon->treeName, tree, sizeof(tcon->treeName));
Pavel Shilovskyfaaf9462011-12-27 16:04:00 +0400904
905 if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) &&
906 ((tcon->share_flags & SHI1005_FLAGS_DFS) == 0))
Joe Perchesf96637b2013-05-04 22:12:25 -0500907 cifs_dbg(VFS, "DFS capability contradicts DFS flag\n");
Steve Frenchde9f68d2013-11-15 11:26:24 -0600908 init_copy_chunk_defaults(tcon);
Steve Frenchff1c0382013-11-19 23:44:46 -0600909 if (tcon->ses->server->ops->validate_negotiate)
910 rc = tcon->ses->server->ops->validate_negotiate(xid, tcon);
Pavel Shilovskyfaaf9462011-12-27 16:04:00 +0400911tcon_exit:
912 free_rsp_buf(resp_buftype, rsp);
913 kfree(unc_path);
914 return rc;
915
916tcon_error_exit:
917 if (rsp->hdr.Status == STATUS_BAD_NETWORK_NAME) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500918 cifs_dbg(VFS, "BAD_NETWORK_NAME: %s\n", tree);
Pavel Shilovskyfaaf9462011-12-27 16:04:00 +0400919 tcon->bad_network_name = true;
920 }
921 goto tcon_exit;
922}
923
924int
925SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon)
926{
927 struct smb2_tree_disconnect_req *req; /* response is trivial */
928 int rc = 0;
929 struct TCP_Server_Info *server;
930 struct cifs_ses *ses = tcon->ses;
931
Joe Perchesf96637b2013-05-04 22:12:25 -0500932 cifs_dbg(FYI, "Tree Disconnect\n");
Pavel Shilovskyfaaf9462011-12-27 16:04:00 +0400933
934 if (ses && (ses->server))
935 server = ses->server;
936 else
937 return -EIO;
938
939 if ((tcon->need_reconnect) || (tcon->ses->need_reconnect))
940 return 0;
941
942 rc = small_smb2_init(SMB2_TREE_DISCONNECT, tcon, (void **) &req);
943 if (rc)
944 return rc;
945
946 rc = SendReceiveNoRsp(xid, ses, (char *)&req->hdr, 0);
947 if (rc)
948 cifs_stats_fail_inc(tcon, SMB2_TREE_DISCONNECT_HE);
949
950 return rc;
951}
Pavel Shilovsky2503a0d2011-12-26 22:58:46 +0400952
Pavel Shilovskyb8c32db2012-09-19 06:22:44 -0700953
Pavel Shilovsky63eb3de2013-07-04 18:41:09 +0400954static struct create_durable *
955create_durable_buf(void)
956{
957 struct create_durable *buf;
958
959 buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
960 if (!buf)
961 return NULL;
962
963 buf->ccontext.DataOffset = cpu_to_le16(offsetof
Pavel Shilovsky9cbc0b72013-07-09 18:40:58 +0400964 (struct create_durable, Data));
Pavel Shilovsky63eb3de2013-07-04 18:41:09 +0400965 buf->ccontext.DataLength = cpu_to_le32(16);
966 buf->ccontext.NameOffset = cpu_to_le16(offsetof
967 (struct create_durable, Name));
968 buf->ccontext.NameLength = cpu_to_le16(4);
969 buf->Name[0] = 'D';
970 buf->Name[1] = 'H';
971 buf->Name[2] = 'n';
972 buf->Name[3] = 'Q';
973 return buf;
974}
975
Pavel Shilovsky9cbc0b72013-07-09 18:40:58 +0400976static struct create_durable *
977create_reconnect_durable_buf(struct cifs_fid *fid)
978{
979 struct create_durable *buf;
980
981 buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
982 if (!buf)
983 return NULL;
984
985 buf->ccontext.DataOffset = cpu_to_le16(offsetof
986 (struct create_durable, Data));
987 buf->ccontext.DataLength = cpu_to_le32(16);
988 buf->ccontext.NameOffset = cpu_to_le16(offsetof
989 (struct create_durable, Name));
990 buf->ccontext.NameLength = cpu_to_le16(4);
991 buf->Data.Fid.PersistentFileId = fid->persistent_fid;
992 buf->Data.Fid.VolatileFileId = fid->volatile_fid;
993 buf->Name[0] = 'D';
994 buf->Name[1] = 'H';
995 buf->Name[2] = 'n';
996 buf->Name[3] = 'C';
997 return buf;
998}
999
Pavel Shilovskyb8c32db2012-09-19 06:22:44 -07001000static __u8
Pavel Shilovsky42873b02013-09-05 21:30:16 +04001001parse_lease_state(struct TCP_Server_Info *server, struct smb2_create_rsp *rsp,
1002 unsigned int *epoch)
Pavel Shilovskyb8c32db2012-09-19 06:22:44 -07001003{
1004 char *data_offset;
Pavel Shilovskyb5c7cde2013-09-05 20:16:45 +04001005 struct create_context *cc;
Pavel Shilovskyfd554392013-07-09 19:44:56 +04001006 unsigned int next = 0;
1007 char *name;
Pavel Shilovskyb8c32db2012-09-19 06:22:44 -07001008
Pavel Shilovskyfd554392013-07-09 19:44:56 +04001009 data_offset = (char *)rsp + 4 + le32_to_cpu(rsp->CreateContextsOffset);
Pavel Shilovskyb5c7cde2013-09-05 20:16:45 +04001010 cc = (struct create_context *)data_offset;
Pavel Shilovskyb8c32db2012-09-19 06:22:44 -07001011 do {
Pavel Shilovskyb5c7cde2013-09-05 20:16:45 +04001012 cc = (struct create_context *)((char *)cc + next);
1013 name = le16_to_cpu(cc->NameOffset) + (char *)cc;
1014 if (le16_to_cpu(cc->NameLength) != 4 ||
Pavel Shilovskyb8c32db2012-09-19 06:22:44 -07001015 strncmp(name, "RqLs", 4)) {
Pavel Shilovskyb5c7cde2013-09-05 20:16:45 +04001016 next = le32_to_cpu(cc->Next);
Pavel Shilovskyb8c32db2012-09-19 06:22:44 -07001017 continue;
1018 }
Pavel Shilovsky42873b02013-09-05 21:30:16 +04001019 return server->ops->parse_lease_buf(cc, epoch);
Pavel Shilovskyfd554392013-07-09 19:44:56 +04001020 } while (next != 0);
Pavel Shilovskyb8c32db2012-09-19 06:22:44 -07001021
Pavel Shilovskyb5c7cde2013-09-05 20:16:45 +04001022 return 0;
Pavel Shilovskyb8c32db2012-09-19 06:22:44 -07001023}
1024
Pavel Shilovskyd22cbfe2013-07-04 19:10:00 +04001025static int
Pavel Shilovskya41a28b2013-09-04 13:07:41 +04001026add_lease_context(struct TCP_Server_Info *server, struct kvec *iov,
1027 unsigned int *num_iovec, __u8 *oplock)
Pavel Shilovskyd22cbfe2013-07-04 19:10:00 +04001028{
1029 struct smb2_create_req *req = iov[0].iov_base;
1030 unsigned int num = *num_iovec;
1031
Pavel Shilovskya41a28b2013-09-04 13:07:41 +04001032 iov[num].iov_base = server->ops->create_lease_buf(oplock+1, *oplock);
Pavel Shilovskyd22cbfe2013-07-04 19:10:00 +04001033 if (iov[num].iov_base == NULL)
1034 return -ENOMEM;
Pavel Shilovskya41a28b2013-09-04 13:07:41 +04001035 iov[num].iov_len = server->vals->create_lease_size;
Pavel Shilovskyd22cbfe2013-07-04 19:10:00 +04001036 req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
1037 if (!req->CreateContextsOffset)
1038 req->CreateContextsOffset = cpu_to_le32(
1039 sizeof(struct smb2_create_req) - 4 +
1040 iov[num - 1].iov_len);
Pavel Shilovskya41a28b2013-09-04 13:07:41 +04001041 le32_add_cpu(&req->CreateContextsLength,
1042 server->vals->create_lease_size);
1043 inc_rfc1001_len(&req->hdr, server->vals->create_lease_size);
Pavel Shilovskyd22cbfe2013-07-04 19:10:00 +04001044 *num_iovec = num + 1;
1045 return 0;
1046}
1047
Pavel Shilovsky63eb3de2013-07-04 18:41:09 +04001048static int
Pavel Shilovsky9cbc0b72013-07-09 18:40:58 +04001049add_durable_context(struct kvec *iov, unsigned int *num_iovec,
1050 struct cifs_open_parms *oparms)
Pavel Shilovsky63eb3de2013-07-04 18:41:09 +04001051{
1052 struct smb2_create_req *req = iov[0].iov_base;
1053 unsigned int num = *num_iovec;
1054
Pavel Shilovsky9cbc0b72013-07-09 18:40:58 +04001055 if (oparms->reconnect) {
1056 iov[num].iov_base = create_reconnect_durable_buf(oparms->fid);
1057 /* indicate that we don't need to relock the file */
1058 oparms->reconnect = false;
1059 } else
1060 iov[num].iov_base = create_durable_buf();
Pavel Shilovsky63eb3de2013-07-04 18:41:09 +04001061 if (iov[num].iov_base == NULL)
1062 return -ENOMEM;
1063 iov[num].iov_len = sizeof(struct create_durable);
1064 if (!req->CreateContextsOffset)
1065 req->CreateContextsOffset =
1066 cpu_to_le32(sizeof(struct smb2_create_req) - 4 +
1067 iov[1].iov_len);
Wei Yongjun31f92e92013-08-26 14:34:46 +08001068 le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable));
Pavel Shilovsky63eb3de2013-07-04 18:41:09 +04001069 inc_rfc1001_len(&req->hdr, sizeof(struct create_durable));
1070 *num_iovec = num + 1;
1071 return 0;
1072}
1073
Pavel Shilovsky2503a0d2011-12-26 22:58:46 +04001074int
Pavel Shilovsky064f6042013-07-09 18:20:30 +04001075SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
Pavel Shilovskyb42bf882013-08-14 19:25:21 +04001076 __u8 *oplock, struct smb2_file_all_info *buf,
1077 struct smb2_err_rsp **err_buf)
Pavel Shilovsky2503a0d2011-12-26 22:58:46 +04001078{
1079 struct smb2_create_req *req;
1080 struct smb2_create_rsp *rsp;
1081 struct TCP_Server_Info *server;
Pavel Shilovsky064f6042013-07-09 18:20:30 +04001082 struct cifs_tcon *tcon = oparms->tcon;
Pavel Shilovsky2503a0d2011-12-26 22:58:46 +04001083 struct cifs_ses *ses = tcon->ses;
Pavel Shilovsky63eb3de2013-07-04 18:41:09 +04001084 struct kvec iov[4];
Pavel Shilovsky2503a0d2011-12-26 22:58:46 +04001085 int resp_buftype;
1086 int uni_path_len;
Pavel Shilovskyb8c32db2012-09-19 06:22:44 -07001087 __le16 *copy_path = NULL;
1088 int copy_size;
Pavel Shilovsky2503a0d2011-12-26 22:58:46 +04001089 int rc = 0;
Pavel Shilovsky59aa3712013-07-04 19:41:24 +04001090 unsigned int num_iovecs = 2;
Pavel Shilovskyca819832013-07-05 12:21:26 +04001091 __u32 file_attributes = 0;
Pavel Shilovsky2503a0d2011-12-26 22:58:46 +04001092
Joe Perchesf96637b2013-05-04 22:12:25 -05001093 cifs_dbg(FYI, "create/open\n");
Pavel Shilovsky2503a0d2011-12-26 22:58:46 +04001094
1095 if (ses && (ses->server))
1096 server = ses->server;
1097 else
1098 return -EIO;
1099
1100 rc = small_smb2_init(SMB2_CREATE, tcon, (void **) &req);
1101 if (rc)
1102 return rc;
1103
Pavel Shilovsky064f6042013-07-09 18:20:30 +04001104 if (oparms->create_options & CREATE_OPTION_READONLY)
Pavel Shilovskyca819832013-07-05 12:21:26 +04001105 file_attributes |= ATTR_READONLY;
1106
Pavel Shilovsky2503a0d2011-12-26 22:58:46 +04001107 req->ImpersonationLevel = IL_IMPERSONATION;
Pavel Shilovsky064f6042013-07-09 18:20:30 +04001108 req->DesiredAccess = cpu_to_le32(oparms->desired_access);
Pavel Shilovsky2503a0d2011-12-26 22:58:46 +04001109 /* File attributes ignored on open (used in create though) */
1110 req->FileAttributes = cpu_to_le32(file_attributes);
1111 req->ShareAccess = FILE_SHARE_ALL_LE;
Pavel Shilovsky064f6042013-07-09 18:20:30 +04001112 req->CreateDisposition = cpu_to_le32(oparms->disposition);
1113 req->CreateOptions = cpu_to_le32(oparms->create_options & CREATE_OPTIONS_MASK);
Pavel Shilovsky2503a0d2011-12-26 22:58:46 +04001114 uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2;
Pavel Shilovsky59aa3712013-07-04 19:41:24 +04001115 /* do not count rfc1001 len field */
1116 req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req) - 4);
Pavel Shilovsky2503a0d2011-12-26 22:58:46 +04001117
1118 iov[0].iov_base = (char *)req;
1119 /* 4 for rfc1002 length field */
1120 iov[0].iov_len = get_rfc1002_length(req) + 4;
1121
1122 /* MUST set path len (NameLength) to 0 opening root of share */
Pavel Shilovsky59aa3712013-07-04 19:41:24 +04001123 req->NameLength = cpu_to_le16(uni_path_len - 2);
1124 /* -1 since last byte is buf[0] which is sent below (path) */
1125 iov[0].iov_len--;
1126 if (uni_path_len % 8 != 0) {
1127 copy_size = uni_path_len / 8 * 8;
1128 if (copy_size < uni_path_len)
1129 copy_size += 8;
Pavel Shilovskyb8c32db2012-09-19 06:22:44 -07001130
Pavel Shilovsky59aa3712013-07-04 19:41:24 +04001131 copy_path = kzalloc(copy_size, GFP_KERNEL);
1132 if (!copy_path)
1133 return -ENOMEM;
1134 memcpy((char *)copy_path, (const char *)path,
1135 uni_path_len);
1136 uni_path_len = copy_size;
1137 path = copy_path;
Pavel Shilovsky2503a0d2011-12-26 22:58:46 +04001138 }
1139
Pavel Shilovsky59aa3712013-07-04 19:41:24 +04001140 iov[1].iov_len = uni_path_len;
1141 iov[1].iov_base = path;
1142 /* -1 since last byte is buf[0] which was counted in smb2_buf_len */
1143 inc_rfc1001_len(req, uni_path_len - 1);
1144
Pavel Shilovskyb8c32db2012-09-19 06:22:44 -07001145 if (!server->oplocks)
1146 *oplock = SMB2_OPLOCK_LEVEL_NONE;
1147
Pavel Shilovskya41a28b2013-09-04 13:07:41 +04001148 if (!(server->capabilities & SMB2_GLOBAL_CAP_LEASING) ||
Pavel Shilovskyb8c32db2012-09-19 06:22:44 -07001149 *oplock == SMB2_OPLOCK_LEVEL_NONE)
1150 req->RequestedOplockLevel = *oplock;
1151 else {
Pavel Shilovskya41a28b2013-09-04 13:07:41 +04001152 rc = add_lease_context(server, iov, &num_iovecs, oplock);
Pavel Shilovskyd22cbfe2013-07-04 19:10:00 +04001153 if (rc) {
Pavel Shilovskyb8c32db2012-09-19 06:22:44 -07001154 cifs_small_buf_release(req);
1155 kfree(copy_path);
Pavel Shilovskyd22cbfe2013-07-04 19:10:00 +04001156 return rc;
Pavel Shilovskyb8c32db2012-09-19 06:22:44 -07001157 }
Pavel Shilovskyb8c32db2012-09-19 06:22:44 -07001158 }
1159
Pavel Shilovsky63eb3de2013-07-04 18:41:09 +04001160 if (*oplock == SMB2_OPLOCK_LEVEL_BATCH) {
1161 /* need to set Next field of lease context if we request it */
Pavel Shilovskya41a28b2013-09-04 13:07:41 +04001162 if (server->capabilities & SMB2_GLOBAL_CAP_LEASING) {
Pavel Shilovsky63eb3de2013-07-04 18:41:09 +04001163 struct create_context *ccontext =
1164 (struct create_context *)iov[num_iovecs-1].iov_base;
Steve French1c469432013-07-10 12:50:57 -05001165 ccontext->Next =
Pavel Shilovskya41a28b2013-09-04 13:07:41 +04001166 cpu_to_le32(server->vals->create_lease_size);
Pavel Shilovsky63eb3de2013-07-04 18:41:09 +04001167 }
Pavel Shilovsky9cbc0b72013-07-09 18:40:58 +04001168 rc = add_durable_context(iov, &num_iovecs, oparms);
Pavel Shilovsky63eb3de2013-07-04 18:41:09 +04001169 if (rc) {
1170 cifs_small_buf_release(req);
1171 kfree(copy_path);
1172 kfree(iov[num_iovecs-1].iov_base);
1173 return rc;
1174 }
1175 }
1176
Pavel Shilovsky2503a0d2011-12-26 22:58:46 +04001177 rc = SendReceive2(xid, ses, iov, num_iovecs, &resp_buftype, 0);
1178 rsp = (struct smb2_create_rsp *)iov[0].iov_base;
1179
1180 if (rc != 0) {
1181 cifs_stats_fail_inc(tcon, SMB2_CREATE_HE);
Pavel Shilovskyb42bf882013-08-14 19:25:21 +04001182 if (err_buf)
1183 *err_buf = kmemdup(rsp, get_rfc1002_length(rsp) + 4,
1184 GFP_KERNEL);
Pavel Shilovsky2503a0d2011-12-26 22:58:46 +04001185 goto creat_exit;
1186 }
1187
Pavel Shilovsky064f6042013-07-09 18:20:30 +04001188 oparms->fid->persistent_fid = rsp->PersistentFileId;
1189 oparms->fid->volatile_fid = rsp->VolatileFileId;
Pavel Shilovskyf0df7372012-09-18 16:20:26 -07001190
1191 if (buf) {
1192 memcpy(buf, &rsp->CreationTime, 32);
1193 buf->AllocationSize = rsp->AllocationSize;
1194 buf->EndOfFile = rsp->EndofFile;
1195 buf->Attributes = rsp->FileAttributes;
1196 buf->NumberOfLinks = cpu_to_le32(1);
1197 buf->DeletePending = 0;
1198 }
Pavel Shilovsky2e44b282012-09-18 16:20:33 -07001199
Pavel Shilovskyb8c32db2012-09-19 06:22:44 -07001200 if (rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE)
Pavel Shilovsky42873b02013-09-05 21:30:16 +04001201 *oplock = parse_lease_state(server, rsp, &oparms->fid->epoch);
Pavel Shilovskyb8c32db2012-09-19 06:22:44 -07001202 else
1203 *oplock = rsp->OplockLevel;
Pavel Shilovsky2503a0d2011-12-26 22:58:46 +04001204creat_exit:
Pavel Shilovskyb8c32db2012-09-19 06:22:44 -07001205 kfree(copy_path);
Pavel Shilovsky2503a0d2011-12-26 22:58:46 +04001206 free_rsp_buf(resp_buftype, rsp);
1207 return rc;
1208}
1209
Steve French4a72daf2013-06-25 00:20:49 -05001210/*
1211 * SMB2 IOCTL is used for both IOCTLs and FSCTLs
1212 */
1213int
1214SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
1215 u64 volatile_fid, u32 opcode, bool is_fsctl, char *in_data,
1216 u32 indatalen, char **out_data, u32 *plen /* returned data len */)
1217{
1218 struct smb2_ioctl_req *req;
1219 struct smb2_ioctl_rsp *rsp;
1220 struct TCP_Server_Info *server;
1221 struct cifs_ses *ses = tcon->ses;
1222 struct kvec iov[2];
1223 int resp_buftype;
1224 int num_iovecs;
1225 int rc = 0;
1226
1227 cifs_dbg(FYI, "SMB2 IOCTL\n");
1228
Steve French7ff8d452013-10-14 00:44:19 -05001229 *out_data = NULL;
Steve French4a72daf2013-06-25 00:20:49 -05001230 /* zero out returned data len, in case of error */
1231 if (plen)
1232 *plen = 0;
1233
1234 if (ses && (ses->server))
1235 server = ses->server;
1236 else
1237 return -EIO;
1238
1239 rc = small_smb2_init(SMB2_IOCTL, tcon, (void **) &req);
1240 if (rc)
1241 return rc;
1242
1243 req->CtlCode = cpu_to_le32(opcode);
1244 req->PersistentFileId = persistent_fid;
1245 req->VolatileFileId = volatile_fid;
1246
1247 if (indatalen) {
1248 req->InputCount = cpu_to_le32(indatalen);
1249 /* do not set InputOffset if no input data */
1250 req->InputOffset =
1251 cpu_to_le32(offsetof(struct smb2_ioctl_req, Buffer) - 4);
1252 iov[1].iov_base = in_data;
1253 iov[1].iov_len = indatalen;
1254 num_iovecs = 2;
1255 } else
1256 num_iovecs = 1;
1257
1258 req->OutputOffset = 0;
1259 req->OutputCount = 0; /* MBZ */
1260
1261 /*
1262 * Could increase MaxOutputResponse, but that would require more
1263 * than one credit. Windows typically sets this smaller, but for some
1264 * ioctls it may be useful to allow server to send more. No point
1265 * limiting what the server can send as long as fits in one credit
1266 */
1267 req->MaxOutputResponse = cpu_to_le32(0xFF00); /* < 64K uses 1 credit */
1268
1269 if (is_fsctl)
1270 req->Flags = cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL);
1271 else
1272 req->Flags = 0;
1273
1274 iov[0].iov_base = (char *)req;
Steve French4a72daf2013-06-25 00:20:49 -05001275
Steve French7ff8d452013-10-14 00:44:19 -05001276 /*
1277 * If no input data, the size of ioctl struct in
1278 * protocol spec still includes a 1 byte data buffer,
1279 * but if input data passed to ioctl, we do not
1280 * want to double count this, so we do not send
1281 * the dummy one byte of data in iovec[0] if sending
1282 * input data (in iovec[1]). We also must add 4 bytes
1283 * in first iovec to allow for rfc1002 length field.
1284 */
1285
1286 if (indatalen) {
1287 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
1288 inc_rfc1001_len(req, indatalen - 1);
1289 } else
1290 iov[0].iov_len = get_rfc1002_length(req) + 4;
1291
Steve French4a72daf2013-06-25 00:20:49 -05001292
1293 rc = SendReceive2(xid, ses, iov, num_iovecs, &resp_buftype, 0);
1294 rsp = (struct smb2_ioctl_rsp *)iov[0].iov_base;
1295
Steve French9bf0c9c2013-11-16 18:05:28 -06001296 if ((rc != 0) && (rc != -EINVAL)) {
Steve French4a72daf2013-06-25 00:20:49 -05001297 if (tcon)
1298 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
1299 goto ioctl_exit;
Steve French9bf0c9c2013-11-16 18:05:28 -06001300 } else if (rc == -EINVAL) {
1301 if ((opcode != FSCTL_SRV_COPYCHUNK_WRITE) &&
1302 (opcode != FSCTL_SRV_COPYCHUNK)) {
1303 if (tcon)
1304 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
1305 goto ioctl_exit;
1306 }
Steve French4a72daf2013-06-25 00:20:49 -05001307 }
1308
1309 /* check if caller wants to look at return data or just return rc */
1310 if ((plen == NULL) || (out_data == NULL))
1311 goto ioctl_exit;
1312
1313 *plen = le32_to_cpu(rsp->OutputCount);
1314
1315 /* We check for obvious errors in the output buffer length and offset */
1316 if (*plen == 0)
1317 goto ioctl_exit; /* server returned no data */
1318 else if (*plen > 0xFF00) {
1319 cifs_dbg(VFS, "srv returned invalid ioctl length: %d\n", *plen);
1320 *plen = 0;
1321 rc = -EIO;
1322 goto ioctl_exit;
1323 }
1324
1325 if (get_rfc1002_length(rsp) < le32_to_cpu(rsp->OutputOffset) + *plen) {
1326 cifs_dbg(VFS, "Malformed ioctl resp: len %d offset %d\n", *plen,
1327 le32_to_cpu(rsp->OutputOffset));
1328 *plen = 0;
1329 rc = -EIO;
1330 goto ioctl_exit;
1331 }
1332
1333 *out_data = kmalloc(*plen, GFP_KERNEL);
1334 if (*out_data == NULL) {
1335 rc = -ENOMEM;
1336 goto ioctl_exit;
1337 }
1338
1339 memcpy(*out_data, rsp->hdr.ProtocolId + le32_to_cpu(rsp->OutputOffset),
1340 *plen);
1341ioctl_exit:
1342 free_rsp_buf(resp_buftype, rsp);
1343 return rc;
1344}
1345
Steve French64a5cfa2013-10-14 15:31:32 -05001346/*
1347 * Individual callers to ioctl worker function follow
1348 */
1349
1350int
1351SMB2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
1352 u64 persistent_fid, u64 volatile_fid)
1353{
1354 int rc;
Steve French64a5cfa2013-10-14 15:31:32 -05001355 struct compress_ioctl fsctl_input;
1356 char *ret_data = NULL;
1357
1358 fsctl_input.CompressionState =
1359 __constant_cpu_to_le16(COMPRESSION_FORMAT_DEFAULT);
1360
1361 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
1362 FSCTL_SET_COMPRESSION, true /* is_fsctl */,
1363 (char *)&fsctl_input /* data input */,
1364 2 /* in data len */, &ret_data /* out data */, NULL);
1365
1366 cifs_dbg(FYI, "set compression rc %d\n", rc);
Steve French64a5cfa2013-10-14 15:31:32 -05001367
1368 return rc;
1369}
1370
Pavel Shilovsky2503a0d2011-12-26 22:58:46 +04001371int
1372SMB2_close(const unsigned int xid, struct cifs_tcon *tcon,
1373 u64 persistent_fid, u64 volatile_fid)
1374{
1375 struct smb2_close_req *req;
1376 struct smb2_close_rsp *rsp;
1377 struct TCP_Server_Info *server;
1378 struct cifs_ses *ses = tcon->ses;
1379 struct kvec iov[1];
1380 int resp_buftype;
1381 int rc = 0;
1382
Joe Perchesf96637b2013-05-04 22:12:25 -05001383 cifs_dbg(FYI, "Close\n");
Pavel Shilovsky2503a0d2011-12-26 22:58:46 +04001384
1385 if (ses && (ses->server))
1386 server = ses->server;
1387 else
1388 return -EIO;
1389
1390 rc = small_smb2_init(SMB2_CLOSE, tcon, (void **) &req);
1391 if (rc)
1392 return rc;
1393
1394 req->PersistentFileId = persistent_fid;
1395 req->VolatileFileId = volatile_fid;
1396
1397 iov[0].iov_base = (char *)req;
1398 /* 4 for rfc1002 length field */
1399 iov[0].iov_len = get_rfc1002_length(req) + 4;
1400
1401 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0);
1402 rsp = (struct smb2_close_rsp *)iov[0].iov_base;
1403
1404 if (rc != 0) {
1405 if (tcon)
1406 cifs_stats_fail_inc(tcon, SMB2_CLOSE_HE);
1407 goto close_exit;
1408 }
1409
Pavel Shilovsky2503a0d2011-12-26 22:58:46 +04001410 /* BB FIXME - decode close response, update inode for caching */
1411
1412close_exit:
1413 free_rsp_buf(resp_buftype, rsp);
1414 return rc;
1415}
Pavel Shilovskybe4cb9e2011-12-29 17:06:33 +04001416
1417static int
1418validate_buf(unsigned int offset, unsigned int buffer_length,
1419 struct smb2_hdr *hdr, unsigned int min_buf_size)
1420
1421{
1422 unsigned int smb_len = be32_to_cpu(hdr->smb2_buf_length);
1423 char *end_of_smb = smb_len + 4 /* RFC1001 length field */ + (char *)hdr;
1424 char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr;
1425 char *end_of_buf = begin_of_buf + buffer_length;
1426
1427
1428 if (buffer_length < min_buf_size) {
Joe Perchesf96637b2013-05-04 22:12:25 -05001429 cifs_dbg(VFS, "buffer length %d smaller than minimum size %d\n",
1430 buffer_length, min_buf_size);
Pavel Shilovskybe4cb9e2011-12-29 17:06:33 +04001431 return -EINVAL;
1432 }
1433
1434 /* check if beyond RFC1001 maximum length */
1435 if ((smb_len > 0x7FFFFF) || (buffer_length > 0x7FFFFF)) {
Joe Perchesf96637b2013-05-04 22:12:25 -05001436 cifs_dbg(VFS, "buffer length %d or smb length %d too large\n",
1437 buffer_length, smb_len);
Pavel Shilovskybe4cb9e2011-12-29 17:06:33 +04001438 return -EINVAL;
1439 }
1440
1441 if ((begin_of_buf > end_of_smb) || (end_of_buf > end_of_smb)) {
Joe Perchesf96637b2013-05-04 22:12:25 -05001442 cifs_dbg(VFS, "illegal server response, bad offset to data\n");
Pavel Shilovskybe4cb9e2011-12-29 17:06:33 +04001443 return -EINVAL;
1444 }
1445
1446 return 0;
1447}
1448
1449/*
1450 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
1451 * Caller must free buffer.
1452 */
1453static int
1454validate_and_copy_buf(unsigned int offset, unsigned int buffer_length,
1455 struct smb2_hdr *hdr, unsigned int minbufsize,
1456 char *data)
1457
1458{
1459 char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr;
1460 int rc;
1461
1462 if (!data)
1463 return -EINVAL;
1464
1465 rc = validate_buf(offset, buffer_length, hdr, minbufsize);
1466 if (rc)
1467 return rc;
1468
1469 memcpy(data, begin_of_buf, buffer_length);
1470
1471 return 0;
1472}
1473
Pavel Shilovskyf0df7372012-09-18 16:20:26 -07001474static int
1475query_info(const unsigned int xid, struct cifs_tcon *tcon,
1476 u64 persistent_fid, u64 volatile_fid, u8 info_class,
1477 size_t output_len, size_t min_len, void *data)
Pavel Shilovskybe4cb9e2011-12-29 17:06:33 +04001478{
1479 struct smb2_query_info_req *req;
1480 struct smb2_query_info_rsp *rsp = NULL;
1481 struct kvec iov[2];
1482 int rc = 0;
1483 int resp_buftype;
1484 struct TCP_Server_Info *server;
1485 struct cifs_ses *ses = tcon->ses;
1486
Joe Perchesf96637b2013-05-04 22:12:25 -05001487 cifs_dbg(FYI, "Query Info\n");
Pavel Shilovskybe4cb9e2011-12-29 17:06:33 +04001488
1489 if (ses && (ses->server))
1490 server = ses->server;
1491 else
1492 return -EIO;
1493
1494 rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req);
1495 if (rc)
1496 return rc;
1497
1498 req->InfoType = SMB2_O_INFO_FILE;
Pavel Shilovskyf0df7372012-09-18 16:20:26 -07001499 req->FileInfoClass = info_class;
Pavel Shilovskybe4cb9e2011-12-29 17:06:33 +04001500 req->PersistentFileId = persistent_fid;
1501 req->VolatileFileId = volatile_fid;
1502 /* 4 for rfc1002 length field and 1 for Buffer */
1503 req->InputBufferOffset =
1504 cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4);
Pavel Shilovskyf0df7372012-09-18 16:20:26 -07001505 req->OutputBufferLength = cpu_to_le32(output_len);
Pavel Shilovskybe4cb9e2011-12-29 17:06:33 +04001506
1507 iov[0].iov_base = (char *)req;
1508 /* 4 for rfc1002 length field */
1509 iov[0].iov_len = get_rfc1002_length(req) + 4;
1510
1511 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0);
Pavel Shilovskye5d04882012-09-19 16:03:26 +04001512 rsp = (struct smb2_query_info_rsp *)iov[0].iov_base;
1513
Pavel Shilovskybe4cb9e2011-12-29 17:06:33 +04001514 if (rc) {
1515 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
1516 goto qinf_exit;
1517 }
1518
Pavel Shilovskybe4cb9e2011-12-29 17:06:33 +04001519 rc = validate_and_copy_buf(le16_to_cpu(rsp->OutputBufferOffset),
1520 le32_to_cpu(rsp->OutputBufferLength),
Pavel Shilovskyf0df7372012-09-18 16:20:26 -07001521 &rsp->hdr, min_len, data);
Pavel Shilovskybe4cb9e2011-12-29 17:06:33 +04001522
1523qinf_exit:
1524 free_rsp_buf(resp_buftype, rsp);
1525 return rc;
1526}
Pavel Shilovsky9094fad2012-07-12 18:30:44 +04001527
Pavel Shilovskyf0df7372012-09-18 16:20:26 -07001528int
1529SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon,
1530 u64 persistent_fid, u64 volatile_fid,
1531 struct smb2_file_all_info *data)
1532{
1533 return query_info(xid, tcon, persistent_fid, volatile_fid,
1534 FILE_ALL_INFORMATION,
1535 sizeof(struct smb2_file_all_info) + MAX_NAME * 2,
1536 sizeof(struct smb2_file_all_info), data);
1537}
1538
1539int
1540SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon,
1541 u64 persistent_fid, u64 volatile_fid, __le64 *uniqueid)
1542{
1543 return query_info(xid, tcon, persistent_fid, volatile_fid,
1544 FILE_INTERNAL_INFORMATION,
1545 sizeof(struct smb2_file_internal_info),
1546 sizeof(struct smb2_file_internal_info), uniqueid);
1547}
1548
Pavel Shilovsky9094fad2012-07-12 18:30:44 +04001549/*
1550 * This is a no-op for now. We're not really interested in the reply, but
1551 * rather in the fact that the server sent one and that server->lstrp
1552 * gets updated.
1553 *
1554 * FIXME: maybe we should consider checking that the reply matches request?
1555 */
1556static void
1557smb2_echo_callback(struct mid_q_entry *mid)
1558{
1559 struct TCP_Server_Info *server = mid->callback_data;
1560 struct smb2_echo_rsp *smb2 = (struct smb2_echo_rsp *)mid->resp_buf;
1561 unsigned int credits_received = 1;
1562
1563 if (mid->mid_state == MID_RESPONSE_RECEIVED)
1564 credits_received = le16_to_cpu(smb2->hdr.CreditRequest);
1565
1566 DeleteMidQEntry(mid);
1567 add_credits(server, credits_received, CIFS_ECHO_OP);
1568}
1569
1570int
1571SMB2_echo(struct TCP_Server_Info *server)
1572{
1573 struct smb2_echo_req *req;
1574 int rc = 0;
1575 struct kvec iov;
Jeff Laytonfec344e2012-09-18 16:20:35 -07001576 struct smb_rqst rqst = { .rq_iov = &iov,
1577 .rq_nvec = 1 };
Pavel Shilovsky9094fad2012-07-12 18:30:44 +04001578
Joe Perchesf96637b2013-05-04 22:12:25 -05001579 cifs_dbg(FYI, "In echo request\n");
Pavel Shilovsky9094fad2012-07-12 18:30:44 +04001580
1581 rc = small_smb2_init(SMB2_ECHO, NULL, (void **)&req);
1582 if (rc)
1583 return rc;
1584
1585 req->hdr.CreditRequest = cpu_to_le16(1);
1586
1587 iov.iov_base = (char *)req;
1588 /* 4 for rfc1002 length field */
1589 iov.iov_len = get_rfc1002_length(req) + 4;
1590
Jeff Laytonfec344e2012-09-18 16:20:35 -07001591 rc = cifs_call_async(server, &rqst, NULL, smb2_echo_callback, server,
Pavel Shilovsky9094fad2012-07-12 18:30:44 +04001592 CIFS_ECHO_OP);
1593 if (rc)
Joe Perchesf96637b2013-05-04 22:12:25 -05001594 cifs_dbg(FYI, "Echo request failed: %d\n", rc);
Pavel Shilovsky9094fad2012-07-12 18:30:44 +04001595
1596 cifs_small_buf_release(req);
1597 return rc;
1598}
Pavel Shilovsky7a5cfb12012-09-18 16:20:28 -07001599
1600int
1601SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
1602 u64 volatile_fid)
1603{
1604 struct smb2_flush_req *req;
1605 struct TCP_Server_Info *server;
1606 struct cifs_ses *ses = tcon->ses;
1607 struct kvec iov[1];
1608 int resp_buftype;
1609 int rc = 0;
1610
Joe Perchesf96637b2013-05-04 22:12:25 -05001611 cifs_dbg(FYI, "Flush\n");
Pavel Shilovsky7a5cfb12012-09-18 16:20:28 -07001612
1613 if (ses && (ses->server))
1614 server = ses->server;
1615 else
1616 return -EIO;
1617
1618 rc = small_smb2_init(SMB2_FLUSH, tcon, (void **) &req);
1619 if (rc)
1620 return rc;
1621
1622 req->PersistentFileId = persistent_fid;
1623 req->VolatileFileId = volatile_fid;
1624
1625 iov[0].iov_base = (char *)req;
1626 /* 4 for rfc1002 length field */
1627 iov[0].iov_len = get_rfc1002_length(req) + 4;
1628
1629 rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0);
1630
1631 if ((rc != 0) && tcon)
1632 cifs_stats_fail_inc(tcon, SMB2_FLUSH_HE);
1633
1634 free_rsp_buf(resp_buftype, iov[0].iov_base);
1635 return rc;
1636}
Pavel Shilovsky09a47072012-09-18 16:20:29 -07001637
1638/*
1639 * To form a chain of read requests, any read requests after the first should
1640 * have the end_of_chain boolean set to true.
1641 */
1642static int
1643smb2_new_read_req(struct kvec *iov, struct cifs_io_parms *io_parms,
1644 unsigned int remaining_bytes, int request_type)
1645{
1646 int rc = -EACCES;
1647 struct smb2_read_req *req = NULL;
1648
1649 rc = small_smb2_init(SMB2_READ, io_parms->tcon, (void **) &req);
1650 if (rc)
1651 return rc;
1652 if (io_parms->tcon->ses->server == NULL)
1653 return -ECONNABORTED;
1654
1655 req->hdr.ProcessId = cpu_to_le32(io_parms->pid);
1656
1657 req->PersistentFileId = io_parms->persistent_fid;
1658 req->VolatileFileId = io_parms->volatile_fid;
1659 req->ReadChannelInfoOffset = 0; /* reserved */
1660 req->ReadChannelInfoLength = 0; /* reserved */
1661 req->Channel = 0; /* reserved */
1662 req->MinimumCount = 0;
1663 req->Length = cpu_to_le32(io_parms->length);
1664 req->Offset = cpu_to_le64(io_parms->offset);
1665
1666 if (request_type & CHAINED_REQUEST) {
1667 if (!(request_type & END_OF_CHAIN)) {
1668 /* 4 for rfc1002 length field */
1669 req->hdr.NextCommand =
1670 cpu_to_le32(get_rfc1002_length(req) + 4);
1671 } else /* END_OF_CHAIN */
1672 req->hdr.NextCommand = 0;
1673 if (request_type & RELATED_REQUEST) {
1674 req->hdr.Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
1675 /*
1676 * Related requests use info from previous read request
1677 * in chain.
1678 */
1679 req->hdr.SessionId = 0xFFFFFFFF;
1680 req->hdr.TreeId = 0xFFFFFFFF;
1681 req->PersistentFileId = 0xFFFFFFFF;
1682 req->VolatileFileId = 0xFFFFFFFF;
1683 }
1684 }
1685 if (remaining_bytes > io_parms->length)
1686 req->RemainingBytes = cpu_to_le32(remaining_bytes);
1687 else
1688 req->RemainingBytes = 0;
1689
1690 iov[0].iov_base = (char *)req;
1691 /* 4 for rfc1002 length field */
1692 iov[0].iov_len = get_rfc1002_length(req) + 4;
1693 return rc;
1694}
1695
1696static void
1697smb2_readv_callback(struct mid_q_entry *mid)
1698{
1699 struct cifs_readdata *rdata = mid->callback_data;
1700 struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink);
1701 struct TCP_Server_Info *server = tcon->ses->server;
Jeff Layton58195752012-09-19 06:22:34 -07001702 struct smb2_hdr *buf = (struct smb2_hdr *)rdata->iov.iov_base;
Pavel Shilovsky09a47072012-09-18 16:20:29 -07001703 unsigned int credits_received = 1;
Jeff Layton58195752012-09-19 06:22:34 -07001704 struct smb_rqst rqst = { .rq_iov = &rdata->iov,
Jeff Layton8321fec2012-09-19 06:22:32 -07001705 .rq_nvec = 1,
1706 .rq_pages = rdata->pages,
1707 .rq_npages = rdata->nr_pages,
1708 .rq_pagesz = rdata->pagesz,
1709 .rq_tailsz = rdata->tailsz };
Pavel Shilovsky09a47072012-09-18 16:20:29 -07001710
Joe Perchesf96637b2013-05-04 22:12:25 -05001711 cifs_dbg(FYI, "%s: mid=%llu state=%d result=%d bytes=%u\n",
1712 __func__, mid->mid, mid->mid_state, rdata->result,
1713 rdata->bytes);
Pavel Shilovsky09a47072012-09-18 16:20:29 -07001714
1715 switch (mid->mid_state) {
1716 case MID_RESPONSE_RECEIVED:
1717 credits_received = le16_to_cpu(buf->CreditRequest);
1718 /* result already set, check signature */
Jeff Layton38d77c52013-05-26 07:01:00 -04001719 if (server->sign) {
Pavel Shilovsky3c1bf7e2012-09-18 16:20:30 -07001720 int rc;
1721
Jeff Layton0b688cf2012-09-18 16:20:34 -07001722 rc = smb2_verify_signature(&rqst, server);
Pavel Shilovsky3c1bf7e2012-09-18 16:20:30 -07001723 if (rc)
Joe Perchesf96637b2013-05-04 22:12:25 -05001724 cifs_dbg(VFS, "SMB signature verification returned error = %d\n",
1725 rc);
Pavel Shilovsky3c1bf7e2012-09-18 16:20:30 -07001726 }
Pavel Shilovsky09a47072012-09-18 16:20:29 -07001727 /* FIXME: should this be counted toward the initiating task? */
1728 task_io_account_read(rdata->bytes);
1729 cifs_stats_bytes_read(tcon, rdata->bytes);
1730 break;
1731 case MID_REQUEST_SUBMITTED:
1732 case MID_RETRY_NEEDED:
1733 rdata->result = -EAGAIN;
1734 break;
1735 default:
1736 if (rdata->result != -ENODATA)
1737 rdata->result = -EIO;
1738 }
1739
1740 if (rdata->result)
1741 cifs_stats_fail_inc(tcon, SMB2_READ_HE);
1742
1743 queue_work(cifsiod_wq, &rdata->work);
1744 DeleteMidQEntry(mid);
1745 add_credits(server, credits_received, 0);
1746}
1747
1748/* smb2_async_readv - send an async write, and set up mid to handle result */
1749int
1750smb2_async_readv(struct cifs_readdata *rdata)
1751{
1752 int rc;
1753 struct smb2_hdr *buf;
1754 struct cifs_io_parms io_parms;
Jeff Layton58195752012-09-19 06:22:34 -07001755 struct smb_rqst rqst = { .rq_iov = &rdata->iov,
Jeff Laytonfec344e2012-09-18 16:20:35 -07001756 .rq_nvec = 1 };
Pavel Shilovsky09a47072012-09-18 16:20:29 -07001757
Joe Perchesf96637b2013-05-04 22:12:25 -05001758 cifs_dbg(FYI, "%s: offset=%llu bytes=%u\n",
1759 __func__, rdata->offset, rdata->bytes);
Pavel Shilovsky09a47072012-09-18 16:20:29 -07001760
1761 io_parms.tcon = tlink_tcon(rdata->cfile->tlink);
1762 io_parms.offset = rdata->offset;
1763 io_parms.length = rdata->bytes;
1764 io_parms.persistent_fid = rdata->cfile->fid.persistent_fid;
1765 io_parms.volatile_fid = rdata->cfile->fid.volatile_fid;
1766 io_parms.pid = rdata->pid;
Jeff Layton58195752012-09-19 06:22:34 -07001767 rc = smb2_new_read_req(&rdata->iov, &io_parms, 0, 0);
Pavel Shilovsky09a47072012-09-18 16:20:29 -07001768 if (rc)
1769 return rc;
1770
Jeff Layton58195752012-09-19 06:22:34 -07001771 buf = (struct smb2_hdr *)rdata->iov.iov_base;
Pavel Shilovsky09a47072012-09-18 16:20:29 -07001772 /* 4 for rfc1002 length field */
Jeff Layton58195752012-09-19 06:22:34 -07001773 rdata->iov.iov_len = get_rfc1002_length(rdata->iov.iov_base) + 4;
Pavel Shilovsky09a47072012-09-18 16:20:29 -07001774
1775 kref_get(&rdata->refcount);
Jeff Laytonfec344e2012-09-18 16:20:35 -07001776 rc = cifs_call_async(io_parms.tcon->ses->server, &rqst,
Pavel Shilovsky09a47072012-09-18 16:20:29 -07001777 cifs_readv_receive, smb2_readv_callback,
1778 rdata, 0);
Pavel Shilovskye5d04882012-09-19 16:03:26 +04001779 if (rc) {
Pavel Shilovsky09a47072012-09-18 16:20:29 -07001780 kref_put(&rdata->refcount, cifs_readdata_release);
Pavel Shilovskye5d04882012-09-19 16:03:26 +04001781 cifs_stats_fail_inc(io_parms.tcon, SMB2_READ_HE);
1782 }
Pavel Shilovsky09a47072012-09-18 16:20:29 -07001783
1784 cifs_small_buf_release(buf);
1785 return rc;
1786}
Pavel Shilovsky33319142012-09-18 16:20:29 -07001787
Pavel Shilovskyd8e05032012-09-18 16:20:30 -07001788int
1789SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms,
1790 unsigned int *nbytes, char **buf, int *buf_type)
1791{
1792 int resp_buftype, rc = -EACCES;
1793 struct smb2_read_rsp *rsp = NULL;
1794 struct kvec iov[1];
1795
1796 *nbytes = 0;
1797 rc = smb2_new_read_req(iov, io_parms, 0, 0);
1798 if (rc)
1799 return rc;
1800
1801 rc = SendReceive2(xid, io_parms->tcon->ses, iov, 1,
1802 &resp_buftype, CIFS_LOG_ERROR);
1803
1804 rsp = (struct smb2_read_rsp *)iov[0].iov_base;
1805
1806 if (rsp->hdr.Status == STATUS_END_OF_FILE) {
1807 free_rsp_buf(resp_buftype, iov[0].iov_base);
1808 return 0;
1809 }
1810
1811 if (rc) {
1812 cifs_stats_fail_inc(io_parms->tcon, SMB2_READ_HE);
Joe Perchesf96637b2013-05-04 22:12:25 -05001813 cifs_dbg(VFS, "Send error in read = %d\n", rc);
Pavel Shilovskyd8e05032012-09-18 16:20:30 -07001814 } else {
1815 *nbytes = le32_to_cpu(rsp->DataLength);
1816 if ((*nbytes > CIFS_MAX_MSGSIZE) ||
1817 (*nbytes > io_parms->length)) {
Joe Perchesf96637b2013-05-04 22:12:25 -05001818 cifs_dbg(FYI, "bad length %d for count %d\n",
1819 *nbytes, io_parms->length);
Pavel Shilovskyd8e05032012-09-18 16:20:30 -07001820 rc = -EIO;
1821 *nbytes = 0;
1822 }
1823 }
1824
1825 if (*buf) {
1826 memcpy(*buf, (char *)rsp->hdr.ProtocolId + rsp->DataOffset,
1827 *nbytes);
1828 free_rsp_buf(resp_buftype, iov[0].iov_base);
1829 } else if (resp_buftype != CIFS_NO_BUFFER) {
1830 *buf = iov[0].iov_base;
1831 if (resp_buftype == CIFS_SMALL_BUFFER)
1832 *buf_type = CIFS_SMALL_BUFFER;
1833 else if (resp_buftype == CIFS_LARGE_BUFFER)
1834 *buf_type = CIFS_LARGE_BUFFER;
1835 }
1836 return rc;
1837}
1838
Pavel Shilovsky33319142012-09-18 16:20:29 -07001839/*
1840 * Check the mid_state and signature on received buffer (if any), and queue the
1841 * workqueue completion task.
1842 */
1843static void
1844smb2_writev_callback(struct mid_q_entry *mid)
1845{
1846 struct cifs_writedata *wdata = mid->callback_data;
1847 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
1848 unsigned int written;
1849 struct smb2_write_rsp *rsp = (struct smb2_write_rsp *)mid->resp_buf;
1850 unsigned int credits_received = 1;
1851
1852 switch (mid->mid_state) {
1853 case MID_RESPONSE_RECEIVED:
1854 credits_received = le16_to_cpu(rsp->hdr.CreditRequest);
1855 wdata->result = smb2_check_receive(mid, tcon->ses->server, 0);
1856 if (wdata->result != 0)
1857 break;
1858
1859 written = le32_to_cpu(rsp->DataLength);
1860 /*
1861 * Mask off high 16 bits when bytes written as returned
1862 * by the server is greater than bytes requested by the
1863 * client. OS/2 servers are known to set incorrect
1864 * CountHigh values.
1865 */
1866 if (written > wdata->bytes)
1867 written &= 0xFFFF;
1868
1869 if (written < wdata->bytes)
1870 wdata->result = -ENOSPC;
1871 else
1872 wdata->bytes = written;
1873 break;
1874 case MID_REQUEST_SUBMITTED:
1875 case MID_RETRY_NEEDED:
1876 wdata->result = -EAGAIN;
1877 break;
1878 default:
1879 wdata->result = -EIO;
1880 break;
1881 }
1882
1883 if (wdata->result)
1884 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
1885
1886 queue_work(cifsiod_wq, &wdata->work);
1887 DeleteMidQEntry(mid);
1888 add_credits(tcon->ses->server, credits_received, 0);
1889}
1890
1891/* smb2_async_writev - send an async write, and set up mid to handle result */
1892int
Steve French4a5c80d2014-02-07 20:45:12 -06001893smb2_async_writev(struct cifs_writedata *wdata,
1894 void (*release)(struct kref *kref))
Pavel Shilovsky33319142012-09-18 16:20:29 -07001895{
Jeff Laytoneddb0792012-09-18 16:20:35 -07001896 int rc = -EACCES;
Pavel Shilovsky33319142012-09-18 16:20:29 -07001897 struct smb2_write_req *req = NULL;
1898 struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
Jeff Laytoneddb0792012-09-18 16:20:35 -07001899 struct kvec iov;
Jeff Laytonfec344e2012-09-18 16:20:35 -07001900 struct smb_rqst rqst;
Pavel Shilovsky33319142012-09-18 16:20:29 -07001901
1902 rc = small_smb2_init(SMB2_WRITE, tcon, (void **) &req);
1903 if (rc)
1904 goto async_writev_out;
1905
Pavel Shilovsky33319142012-09-18 16:20:29 -07001906 req->hdr.ProcessId = cpu_to_le32(wdata->cfile->pid);
1907
1908 req->PersistentFileId = wdata->cfile->fid.persistent_fid;
1909 req->VolatileFileId = wdata->cfile->fid.volatile_fid;
1910 req->WriteChannelInfoOffset = 0;
1911 req->WriteChannelInfoLength = 0;
1912 req->Channel = 0;
1913 req->Offset = cpu_to_le64(wdata->offset);
1914 /* 4 for rfc1002 length field */
1915 req->DataOffset = cpu_to_le16(
1916 offsetof(struct smb2_write_req, Buffer) - 4);
1917 req->RemainingBytes = 0;
1918
1919 /* 4 for rfc1002 length field and 1 for Buffer */
Jeff Laytoneddb0792012-09-18 16:20:35 -07001920 iov.iov_len = get_rfc1002_length(req) + 4 - 1;
1921 iov.iov_base = req;
Pavel Shilovsky33319142012-09-18 16:20:29 -07001922
Jeff Laytoneddb0792012-09-18 16:20:35 -07001923 rqst.rq_iov = &iov;
1924 rqst.rq_nvec = 1;
1925 rqst.rq_pages = wdata->pages;
1926 rqst.rq_npages = wdata->nr_pages;
1927 rqst.rq_pagesz = wdata->pagesz;
1928 rqst.rq_tailsz = wdata->tailsz;
Pavel Shilovsky33319142012-09-18 16:20:29 -07001929
Joe Perchesf96637b2013-05-04 22:12:25 -05001930 cifs_dbg(FYI, "async write at %llu %u bytes\n",
1931 wdata->offset, wdata->bytes);
Pavel Shilovsky33319142012-09-18 16:20:29 -07001932
1933 req->Length = cpu_to_le32(wdata->bytes);
1934
1935 inc_rfc1001_len(&req->hdr, wdata->bytes - 1 /* Buffer */);
1936
1937 kref_get(&wdata->refcount);
Jeff Laytonfec344e2012-09-18 16:20:35 -07001938 rc = cifs_call_async(tcon->ses->server, &rqst, NULL,
1939 smb2_writev_callback, wdata, 0);
Pavel Shilovsky33319142012-09-18 16:20:29 -07001940
Pavel Shilovskye5d04882012-09-19 16:03:26 +04001941 if (rc) {
Steve French4a5c80d2014-02-07 20:45:12 -06001942 kref_put(&wdata->refcount, release);
Pavel Shilovskye5d04882012-09-19 16:03:26 +04001943 cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
1944 }
Pavel Shilovsky33319142012-09-18 16:20:29 -07001945
Pavel Shilovsky33319142012-09-18 16:20:29 -07001946async_writev_out:
1947 cifs_small_buf_release(req);
Pavel Shilovsky33319142012-09-18 16:20:29 -07001948 return rc;
1949}
Pavel Shilovsky009d3442012-09-18 16:20:30 -07001950
1951/*
1952 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
1953 * The length field from io_parms must be at least 1 and indicates a number of
1954 * elements with data to write that begins with position 1 in iov array. All
1955 * data length is specified by count.
1956 */
1957int
1958SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms,
1959 unsigned int *nbytes, struct kvec *iov, int n_vec)
1960{
1961 int rc = 0;
1962 struct smb2_write_req *req = NULL;
1963 struct smb2_write_rsp *rsp = NULL;
1964 int resp_buftype;
1965 *nbytes = 0;
1966
1967 if (n_vec < 1)
1968 return rc;
1969
1970 rc = small_smb2_init(SMB2_WRITE, io_parms->tcon, (void **) &req);
1971 if (rc)
1972 return rc;
1973
1974 if (io_parms->tcon->ses->server == NULL)
1975 return -ECONNABORTED;
1976
1977 req->hdr.ProcessId = cpu_to_le32(io_parms->pid);
1978
1979 req->PersistentFileId = io_parms->persistent_fid;
1980 req->VolatileFileId = io_parms->volatile_fid;
1981 req->WriteChannelInfoOffset = 0;
1982 req->WriteChannelInfoLength = 0;
1983 req->Channel = 0;
1984 req->Length = cpu_to_le32(io_parms->length);
1985 req->Offset = cpu_to_le64(io_parms->offset);
1986 /* 4 for rfc1002 length field */
1987 req->DataOffset = cpu_to_le16(
1988 offsetof(struct smb2_write_req, Buffer) - 4);
1989 req->RemainingBytes = 0;
1990
1991 iov[0].iov_base = (char *)req;
1992 /* 4 for rfc1002 length field and 1 for Buffer */
1993 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
1994
1995 /* length of entire message including data to be written */
1996 inc_rfc1001_len(req, io_parms->length - 1 /* Buffer */);
1997
1998 rc = SendReceive2(xid, io_parms->tcon->ses, iov, n_vec + 1,
1999 &resp_buftype, 0);
Pavel Shilovskye5d04882012-09-19 16:03:26 +04002000 rsp = (struct smb2_write_rsp *)iov[0].iov_base;
Pavel Shilovsky009d3442012-09-18 16:20:30 -07002001
2002 if (rc) {
2003 cifs_stats_fail_inc(io_parms->tcon, SMB2_WRITE_HE);
Joe Perchesf96637b2013-05-04 22:12:25 -05002004 cifs_dbg(VFS, "Send error in write = %d\n", rc);
Pavel Shilovskye5d04882012-09-19 16:03:26 +04002005 } else
Pavel Shilovsky009d3442012-09-18 16:20:30 -07002006 *nbytes = le32_to_cpu(rsp->DataLength);
Pavel Shilovskye5d04882012-09-19 16:03:26 +04002007
2008 free_rsp_buf(resp_buftype, rsp);
Pavel Shilovsky009d3442012-09-18 16:20:30 -07002009 return rc;
2010}
Pavel Shilovsky35143eb2012-09-18 16:20:31 -07002011
Pavel Shilovskyd324f08d2012-09-18 16:20:33 -07002012static unsigned int
2013num_entries(char *bufstart, char *end_of_buf, char **lastentry, size_t size)
2014{
2015 int len;
2016 unsigned int entrycount = 0;
2017 unsigned int next_offset = 0;
2018 FILE_DIRECTORY_INFO *entryptr;
2019
2020 if (bufstart == NULL)
2021 return 0;
2022
2023 entryptr = (FILE_DIRECTORY_INFO *)bufstart;
2024
2025 while (1) {
2026 entryptr = (FILE_DIRECTORY_INFO *)
2027 ((char *)entryptr + next_offset);
2028
2029 if ((char *)entryptr + size > end_of_buf) {
Joe Perchesf96637b2013-05-04 22:12:25 -05002030 cifs_dbg(VFS, "malformed search entry would overflow\n");
Pavel Shilovskyd324f08d2012-09-18 16:20:33 -07002031 break;
2032 }
2033
2034 len = le32_to_cpu(entryptr->FileNameLength);
2035 if ((char *)entryptr + len + size > end_of_buf) {
Joe Perchesf96637b2013-05-04 22:12:25 -05002036 cifs_dbg(VFS, "directory entry name would overflow frame end of buf %p\n",
2037 end_of_buf);
Pavel Shilovskyd324f08d2012-09-18 16:20:33 -07002038 break;
2039 }
2040
2041 *lastentry = (char *)entryptr;
2042 entrycount++;
2043
2044 next_offset = le32_to_cpu(entryptr->NextEntryOffset);
2045 if (!next_offset)
2046 break;
2047 }
2048
2049 return entrycount;
2050}
2051
2052/*
2053 * Readdir/FindFirst
2054 */
2055int
2056SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
2057 u64 persistent_fid, u64 volatile_fid, int index,
2058 struct cifs_search_info *srch_inf)
2059{
2060 struct smb2_query_directory_req *req;
2061 struct smb2_query_directory_rsp *rsp = NULL;
2062 struct kvec iov[2];
2063 int rc = 0;
2064 int len;
2065 int resp_buftype;
2066 unsigned char *bufptr;
2067 struct TCP_Server_Info *server;
2068 struct cifs_ses *ses = tcon->ses;
2069 __le16 asteriks = cpu_to_le16('*');
2070 char *end_of_smb;
2071 unsigned int output_size = CIFSMaxBufSize;
2072 size_t info_buf_size;
2073
2074 if (ses && (ses->server))
2075 server = ses->server;
2076 else
2077 return -EIO;
2078
2079 rc = small_smb2_init(SMB2_QUERY_DIRECTORY, tcon, (void **) &req);
2080 if (rc)
2081 return rc;
2082
2083 switch (srch_inf->info_level) {
2084 case SMB_FIND_FILE_DIRECTORY_INFO:
2085 req->FileInformationClass = FILE_DIRECTORY_INFORMATION;
2086 info_buf_size = sizeof(FILE_DIRECTORY_INFO) - 1;
2087 break;
2088 case SMB_FIND_FILE_ID_FULL_DIR_INFO:
2089 req->FileInformationClass = FILEID_FULL_DIRECTORY_INFORMATION;
2090 info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO) - 1;
2091 break;
2092 default:
Joe Perchesf96637b2013-05-04 22:12:25 -05002093 cifs_dbg(VFS, "info level %u isn't supported\n",
2094 srch_inf->info_level);
Pavel Shilovskyd324f08d2012-09-18 16:20:33 -07002095 rc = -EINVAL;
2096 goto qdir_exit;
2097 }
2098
2099 req->FileIndex = cpu_to_le32(index);
2100 req->PersistentFileId = persistent_fid;
2101 req->VolatileFileId = volatile_fid;
2102
2103 len = 0x2;
2104 bufptr = req->Buffer;
2105 memcpy(bufptr, &asteriks, len);
2106
2107 req->FileNameOffset =
2108 cpu_to_le16(sizeof(struct smb2_query_directory_req) - 1 - 4);
2109 req->FileNameLength = cpu_to_le16(len);
2110 /*
2111 * BB could be 30 bytes or so longer if we used SMB2 specific
2112 * buffer lengths, but this is safe and close enough.
2113 */
2114 output_size = min_t(unsigned int, output_size, server->maxBuf);
2115 output_size = min_t(unsigned int, output_size, 2 << 15);
2116 req->OutputBufferLength = cpu_to_le32(output_size);
2117
2118 iov[0].iov_base = (char *)req;
2119 /* 4 for RFC1001 length and 1 for Buffer */
2120 iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
2121
2122 iov[1].iov_base = (char *)(req->Buffer);
2123 iov[1].iov_len = len;
2124
2125 inc_rfc1001_len(req, len - 1 /* Buffer */);
2126
2127 rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, 0);
Pavel Shilovskye5d04882012-09-19 16:03:26 +04002128 rsp = (struct smb2_query_directory_rsp *)iov[0].iov_base;
2129
Pavel Shilovskyd324f08d2012-09-18 16:20:33 -07002130 if (rc) {
2131 cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE);
2132 goto qdir_exit;
2133 }
Pavel Shilovskyd324f08d2012-09-18 16:20:33 -07002134
2135 rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset),
2136 le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr,
2137 info_buf_size);
2138 if (rc)
2139 goto qdir_exit;
2140
2141 srch_inf->unicode = true;
2142
2143 if (srch_inf->ntwrk_buf_start) {
2144 if (srch_inf->smallBuf)
2145 cifs_small_buf_release(srch_inf->ntwrk_buf_start);
2146 else
2147 cifs_buf_release(srch_inf->ntwrk_buf_start);
2148 }
2149 srch_inf->ntwrk_buf_start = (char *)rsp;
2150 srch_inf->srch_entries_start = srch_inf->last_entry = 4 /* rfclen */ +
2151 (char *)&rsp->hdr + le16_to_cpu(rsp->OutputBufferOffset);
2152 /* 4 for rfc1002 length field */
2153 end_of_smb = get_rfc1002_length(rsp) + 4 + (char *)&rsp->hdr;
2154 srch_inf->entries_in_buffer =
2155 num_entries(srch_inf->srch_entries_start, end_of_smb,
2156 &srch_inf->last_entry, info_buf_size);
2157 srch_inf->index_of_last_entry += srch_inf->entries_in_buffer;
Joe Perchesf96637b2013-05-04 22:12:25 -05002158 cifs_dbg(FYI, "num entries %d last_index %lld srch start %p srch end %p\n",
2159 srch_inf->entries_in_buffer, srch_inf->index_of_last_entry,
2160 srch_inf->srch_entries_start, srch_inf->last_entry);
Pavel Shilovskyd324f08d2012-09-18 16:20:33 -07002161 if (resp_buftype == CIFS_LARGE_BUFFER)
2162 srch_inf->smallBuf = false;
2163 else if (resp_buftype == CIFS_SMALL_BUFFER)
2164 srch_inf->smallBuf = true;
2165 else
Joe Perchesf96637b2013-05-04 22:12:25 -05002166 cifs_dbg(VFS, "illegal search buffer type\n");
Pavel Shilovskyd324f08d2012-09-18 16:20:33 -07002167
2168 if (rsp->hdr.Status == STATUS_NO_MORE_FILES)
2169 srch_inf->endOfSearch = 1;
2170 else
2171 srch_inf->endOfSearch = 0;
2172
2173 return rc;
2174
2175qdir_exit:
2176 free_rsp_buf(resp_buftype, rsp);
2177 return rc;
2178}
2179
Pavel Shilovsky35143eb2012-09-18 16:20:31 -07002180static int
2181send_set_info(const unsigned int xid, struct cifs_tcon *tcon,
Pavel Shilovskyc839ff22012-09-18 16:20:32 -07002182 u64 persistent_fid, u64 volatile_fid, u32 pid, int info_class,
Pavel Shilovsky35143eb2012-09-18 16:20:31 -07002183 unsigned int num, void **data, unsigned int *size)
2184{
2185 struct smb2_set_info_req *req;
2186 struct smb2_set_info_rsp *rsp = NULL;
2187 struct kvec *iov;
2188 int rc = 0;
2189 int resp_buftype;
2190 unsigned int i;
2191 struct TCP_Server_Info *server;
2192 struct cifs_ses *ses = tcon->ses;
2193
2194 if (ses && (ses->server))
2195 server = ses->server;
2196 else
2197 return -EIO;
2198
2199 if (!num)
2200 return -EINVAL;
2201
2202 iov = kmalloc(sizeof(struct kvec) * num, GFP_KERNEL);
2203 if (!iov)
2204 return -ENOMEM;
2205
2206 rc = small_smb2_init(SMB2_SET_INFO, tcon, (void **) &req);
2207 if (rc) {
2208 kfree(iov);
2209 return rc;
2210 }
2211
Pavel Shilovskyc839ff22012-09-18 16:20:32 -07002212 req->hdr.ProcessId = cpu_to_le32(pid);
2213
Pavel Shilovsky35143eb2012-09-18 16:20:31 -07002214 req->InfoType = SMB2_O_INFO_FILE;
2215 req->FileInfoClass = info_class;
2216 req->PersistentFileId = persistent_fid;
2217 req->VolatileFileId = volatile_fid;
2218
2219 /* 4 for RFC1001 length and 1 for Buffer */
2220 req->BufferOffset =
2221 cpu_to_le16(sizeof(struct smb2_set_info_req) - 1 - 4);
2222 req->BufferLength = cpu_to_le32(*size);
2223
2224 inc_rfc1001_len(req, *size - 1 /* Buffer */);
2225
2226 memcpy(req->Buffer, *data, *size);
2227
2228 iov[0].iov_base = (char *)req;
2229 /* 4 for RFC1001 length */
2230 iov[0].iov_len = get_rfc1002_length(req) + 4;
2231
2232 for (i = 1; i < num; i++) {
2233 inc_rfc1001_len(req, size[i]);
2234 le32_add_cpu(&req->BufferLength, size[i]);
2235 iov[i].iov_base = (char *)data[i];
2236 iov[i].iov_len = size[i];
2237 }
2238
2239 rc = SendReceive2(xid, ses, iov, num, &resp_buftype, 0);
2240 rsp = (struct smb2_set_info_rsp *)iov[0].iov_base;
2241
Steve French7d3fb242013-11-18 09:56:28 -06002242 if (rc != 0)
Pavel Shilovsky35143eb2012-09-18 16:20:31 -07002243 cifs_stats_fail_inc(tcon, SMB2_SET_INFO_HE);
Steve French7d3fb242013-11-18 09:56:28 -06002244
Pavel Shilovsky35143eb2012-09-18 16:20:31 -07002245 free_rsp_buf(resp_buftype, rsp);
2246 kfree(iov);
2247 return rc;
2248}
2249
2250int
2251SMB2_rename(const unsigned int xid, struct cifs_tcon *tcon,
2252 u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
2253{
2254 struct smb2_file_rename_info info;
2255 void **data;
2256 unsigned int size[2];
2257 int rc;
2258 int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX));
2259
2260 data = kmalloc(sizeof(void *) * 2, GFP_KERNEL);
2261 if (!data)
2262 return -ENOMEM;
2263
2264 info.ReplaceIfExists = 1; /* 1 = replace existing target with new */
2265 /* 0 = fail if target already exists */
2266 info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */
2267 info.FileNameLength = cpu_to_le32(len);
2268
2269 data[0] = &info;
2270 size[0] = sizeof(struct smb2_file_rename_info);
2271
2272 data[1] = target_file;
2273 size[1] = len + 2 /* null */;
2274
2275 rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
Pavel Shilovskyc839ff22012-09-18 16:20:32 -07002276 current->tgid, FILE_RENAME_INFORMATION, 2, data,
2277 size);
Pavel Shilovsky35143eb2012-09-18 16:20:31 -07002278 kfree(data);
2279 return rc;
2280}
Pavel Shilovsky568798c2012-09-18 16:20:31 -07002281
2282int
2283SMB2_set_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
2284 u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
2285{
2286 struct smb2_file_link_info info;
2287 void **data;
2288 unsigned int size[2];
2289 int rc;
2290 int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX));
2291
2292 data = kmalloc(sizeof(void *) * 2, GFP_KERNEL);
2293 if (!data)
2294 return -ENOMEM;
2295
2296 info.ReplaceIfExists = 0; /* 1 = replace existing link with new */
2297 /* 0 = fail if link already exists */
2298 info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */
2299 info.FileNameLength = cpu_to_le32(len);
2300
2301 data[0] = &info;
2302 size[0] = sizeof(struct smb2_file_link_info);
2303
2304 data[1] = target_file;
2305 size[1] = len + 2 /* null */;
2306
2307 rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
Pavel Shilovskyc839ff22012-09-18 16:20:32 -07002308 current->tgid, FILE_LINK_INFORMATION, 2, data, size);
Pavel Shilovsky568798c2012-09-18 16:20:31 -07002309 kfree(data);
2310 return rc;
2311}
Pavel Shilovskyc839ff22012-09-18 16:20:32 -07002312
2313int
2314SMB2_set_eof(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
2315 u64 volatile_fid, u32 pid, __le64 *eof)
2316{
2317 struct smb2_file_eof_info info;
2318 void *data;
2319 unsigned int size;
2320
2321 info.EndOfFile = *eof;
2322
2323 data = &info;
2324 size = sizeof(struct smb2_file_eof_info);
2325
2326 return send_set_info(xid, tcon, persistent_fid, volatile_fid, pid,
2327 FILE_END_OF_FILE_INFORMATION, 1, &data, &size);
2328}
Pavel Shilovsky1feeaac2012-09-18 16:20:32 -07002329
2330int
2331SMB2_set_info(const unsigned int xid, struct cifs_tcon *tcon,
2332 u64 persistent_fid, u64 volatile_fid, FILE_BASIC_INFO *buf)
2333{
2334 unsigned int size;
2335 size = sizeof(FILE_BASIC_INFO);
2336 return send_set_info(xid, tcon, persistent_fid, volatile_fid,
2337 current->tgid, FILE_BASIC_INFORMATION, 1,
2338 (void **)&buf, &size);
2339}
Pavel Shilovsky983c88a2012-09-18 16:20:33 -07002340
2341int
2342SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon,
2343 const u64 persistent_fid, const u64 volatile_fid,
2344 __u8 oplock_level)
2345{
2346 int rc;
2347 struct smb2_oplock_break *req = NULL;
2348
Joe Perchesf96637b2013-05-04 22:12:25 -05002349 cifs_dbg(FYI, "SMB2_oplock_break\n");
Pavel Shilovsky983c88a2012-09-18 16:20:33 -07002350 rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req);
2351
2352 if (rc)
2353 return rc;
2354
2355 req->VolatileFid = volatile_fid;
2356 req->PersistentFid = persistent_fid;
2357 req->OplockLevel = oplock_level;
2358 req->hdr.CreditRequest = cpu_to_le16(1);
2359
2360 rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, CIFS_OBREAK_OP);
2361 /* SMB2 buffer freed by function above */
2362
2363 if (rc) {
2364 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
Joe Perchesf96637b2013-05-04 22:12:25 -05002365 cifs_dbg(FYI, "Send error in Oplock Break = %d\n", rc);
Pavel Shilovsky983c88a2012-09-18 16:20:33 -07002366 }
2367
2368 return rc;
2369}
Pavel Shilovsky6fc05c22012-09-18 16:20:34 -07002370
2371static void
2372copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info *pfs_inf,
2373 struct kstatfs *kst)
2374{
2375 kst->f_bsize = le32_to_cpu(pfs_inf->BytesPerSector) *
2376 le32_to_cpu(pfs_inf->SectorsPerAllocationUnit);
2377 kst->f_blocks = le64_to_cpu(pfs_inf->TotalAllocationUnits);
2378 kst->f_bfree = le64_to_cpu(pfs_inf->ActualAvailableAllocationUnits);
2379 kst->f_bavail = le64_to_cpu(pfs_inf->CallerAvailableAllocationUnits);
2380 return;
2381}
2382
2383static int
2384build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon, int level,
2385 int outbuf_len, u64 persistent_fid, u64 volatile_fid)
2386{
2387 int rc;
2388 struct smb2_query_info_req *req;
2389
Joe Perchesf96637b2013-05-04 22:12:25 -05002390 cifs_dbg(FYI, "Query FSInfo level %d\n", level);
Pavel Shilovsky6fc05c22012-09-18 16:20:34 -07002391
2392 if ((tcon->ses == NULL) || (tcon->ses->server == NULL))
2393 return -EIO;
2394
2395 rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req);
2396 if (rc)
2397 return rc;
2398
2399 req->InfoType = SMB2_O_INFO_FILESYSTEM;
2400 req->FileInfoClass = level;
2401 req->PersistentFileId = persistent_fid;
2402 req->VolatileFileId = volatile_fid;
2403 /* 4 for rfc1002 length field and 1 for pad */
2404 req->InputBufferOffset =
2405 cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4);
2406 req->OutputBufferLength = cpu_to_le32(
2407 outbuf_len + sizeof(struct smb2_query_info_rsp) - 1 - 4);
2408
2409 iov->iov_base = (char *)req;
2410 /* 4 for rfc1002 length field */
2411 iov->iov_len = get_rfc1002_length(req) + 4;
2412 return 0;
2413}
2414
2415int
2416SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon,
2417 u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata)
2418{
2419 struct smb2_query_info_rsp *rsp = NULL;
2420 struct kvec iov;
2421 int rc = 0;
2422 int resp_buftype;
2423 struct cifs_ses *ses = tcon->ses;
2424 struct smb2_fs_full_size_info *info = NULL;
2425
2426 rc = build_qfs_info_req(&iov, tcon, FS_FULL_SIZE_INFORMATION,
2427 sizeof(struct smb2_fs_full_size_info),
2428 persistent_fid, volatile_fid);
2429 if (rc)
2430 return rc;
2431
2432 rc = SendReceive2(xid, ses, &iov, 1, &resp_buftype, 0);
2433 if (rc) {
2434 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
Steve French34f62642013-10-09 02:07:00 -05002435 goto qfsinf_exit;
Pavel Shilovsky6fc05c22012-09-18 16:20:34 -07002436 }
2437 rsp = (struct smb2_query_info_rsp *)iov.iov_base;
2438
2439 info = (struct smb2_fs_full_size_info *)(4 /* RFC1001 len */ +
2440 le16_to_cpu(rsp->OutputBufferOffset) + (char *)&rsp->hdr);
2441 rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset),
2442 le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr,
2443 sizeof(struct smb2_fs_full_size_info));
2444 if (!rc)
2445 copy_fs_info_to_kstatfs(info, fsdata);
2446
Steve French34f62642013-10-09 02:07:00 -05002447qfsinf_exit:
2448 free_rsp_buf(resp_buftype, iov.iov_base);
2449 return rc;
2450}
2451
2452int
2453SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon,
Steven French21671142013-10-09 13:36:35 -05002454 u64 persistent_fid, u64 volatile_fid, int level)
Steve French34f62642013-10-09 02:07:00 -05002455{
2456 struct smb2_query_info_rsp *rsp = NULL;
2457 struct kvec iov;
2458 int rc = 0;
Steven French21671142013-10-09 13:36:35 -05002459 int resp_buftype, max_len, min_len;
Steve French34f62642013-10-09 02:07:00 -05002460 struct cifs_ses *ses = tcon->ses;
2461 unsigned int rsp_len, offset;
2462
Steven French21671142013-10-09 13:36:35 -05002463 if (level == FS_DEVICE_INFORMATION) {
2464 max_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
2465 min_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
2466 } else if (level == FS_ATTRIBUTE_INFORMATION) {
2467 max_len = sizeof(FILE_SYSTEM_ATTRIBUTE_INFO);
2468 min_len = MIN_FS_ATTR_INFO_SIZE;
Steven Frenchaf6a12e2013-10-09 20:55:53 -05002469 } else if (level == FS_SECTOR_SIZE_INFORMATION) {
2470 max_len = sizeof(struct smb3_fs_ss_info);
2471 min_len = sizeof(struct smb3_fs_ss_info);
Steven French21671142013-10-09 13:36:35 -05002472 } else {
Steven Frenchaf6a12e2013-10-09 20:55:53 -05002473 cifs_dbg(FYI, "Invalid qfsinfo level %d\n", level);
Steven French21671142013-10-09 13:36:35 -05002474 return -EINVAL;
2475 }
2476
2477 rc = build_qfs_info_req(&iov, tcon, level, max_len,
Steve French34f62642013-10-09 02:07:00 -05002478 persistent_fid, volatile_fid);
2479 if (rc)
2480 return rc;
2481
2482 rc = SendReceive2(xid, ses, &iov, 1, &resp_buftype, 0);
2483 if (rc) {
2484 cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
2485 goto qfsattr_exit;
2486 }
2487 rsp = (struct smb2_query_info_rsp *)iov.iov_base;
2488
2489 rsp_len = le32_to_cpu(rsp->OutputBufferLength);
2490 offset = le16_to_cpu(rsp->OutputBufferOffset);
Steven French21671142013-10-09 13:36:35 -05002491 rc = validate_buf(offset, rsp_len, &rsp->hdr, min_len);
2492 if (rc)
2493 goto qfsattr_exit;
2494
2495 if (level == FS_ATTRIBUTE_INFORMATION)
Steve French34f62642013-10-09 02:07:00 -05002496 memcpy(&tcon->fsAttrInfo, 4 /* RFC1001 len */ + offset
2497 + (char *)&rsp->hdr, min_t(unsigned int,
Steven French21671142013-10-09 13:36:35 -05002498 rsp_len, max_len));
2499 else if (level == FS_DEVICE_INFORMATION)
2500 memcpy(&tcon->fsDevInfo, 4 /* RFC1001 len */ + offset
2501 + (char *)&rsp->hdr, sizeof(FILE_SYSTEM_DEVICE_INFO));
Steven Frenchaf6a12e2013-10-09 20:55:53 -05002502 else if (level == FS_SECTOR_SIZE_INFORMATION) {
2503 struct smb3_fs_ss_info *ss_info = (struct smb3_fs_ss_info *)
2504 (4 /* RFC1001 len */ + offset + (char *)&rsp->hdr);
2505 tcon->ss_flags = le32_to_cpu(ss_info->Flags);
2506 tcon->perf_sector_size =
2507 le32_to_cpu(ss_info->PhysicalBytesPerSectorForPerf);
2508 }
Steve French34f62642013-10-09 02:07:00 -05002509
2510qfsattr_exit:
Pavel Shilovsky6fc05c22012-09-18 16:20:34 -07002511 free_rsp_buf(resp_buftype, iov.iov_base);
2512 return rc;
2513}
Pavel Shilovskyf7ba7fe2012-09-19 06:22:43 -07002514
2515int
2516smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon,
2517 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
2518 const __u32 num_lock, struct smb2_lock_element *buf)
2519{
2520 int rc = 0;
2521 struct smb2_lock_req *req = NULL;
2522 struct kvec iov[2];
2523 int resp_buf_type;
2524 unsigned int count;
2525
Joe Perchesf96637b2013-05-04 22:12:25 -05002526 cifs_dbg(FYI, "smb2_lockv num lock %d\n", num_lock);
Pavel Shilovskyf7ba7fe2012-09-19 06:22:43 -07002527
2528 rc = small_smb2_init(SMB2_LOCK, tcon, (void **) &req);
2529 if (rc)
2530 return rc;
2531
2532 req->hdr.ProcessId = cpu_to_le32(pid);
2533 req->LockCount = cpu_to_le16(num_lock);
2534
2535 req->PersistentFileId = persist_fid;
2536 req->VolatileFileId = volatile_fid;
2537
2538 count = num_lock * sizeof(struct smb2_lock_element);
2539 inc_rfc1001_len(req, count - sizeof(struct smb2_lock_element));
2540
2541 iov[0].iov_base = (char *)req;
2542 /* 4 for rfc1002 length field and count for all locks */
2543 iov[0].iov_len = get_rfc1002_length(req) + 4 - count;
2544 iov[1].iov_base = (char *)buf;
2545 iov[1].iov_len = count;
2546
2547 cifs_stats_inc(&tcon->stats.cifs_stats.num_locks);
2548 rc = SendReceive2(xid, tcon->ses, iov, 2, &resp_buf_type, CIFS_NO_RESP);
2549 if (rc) {
Joe Perchesf96637b2013-05-04 22:12:25 -05002550 cifs_dbg(FYI, "Send error in smb2_lockv = %d\n", rc);
Pavel Shilovskyf7ba7fe2012-09-19 06:22:43 -07002551 cifs_stats_fail_inc(tcon, SMB2_LOCK_HE);
2552 }
2553
2554 return rc;
2555}
2556
2557int
2558SMB2_lock(const unsigned int xid, struct cifs_tcon *tcon,
2559 const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid,
2560 const __u64 length, const __u64 offset, const __u32 lock_flags,
2561 const bool wait)
2562{
2563 struct smb2_lock_element lock;
2564
2565 lock.Offset = cpu_to_le64(offset);
2566 lock.Length = cpu_to_le64(length);
2567 lock.Flags = cpu_to_le32(lock_flags);
2568 if (!wait && lock_flags != SMB2_LOCKFLAG_UNLOCK)
2569 lock.Flags |= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY);
2570
2571 return smb2_lockv(xid, tcon, persist_fid, volatile_fid, pid, 1, &lock);
2572}
Pavel Shilovsky0822f512012-09-19 06:22:45 -07002573
2574int
2575SMB2_lease_break(const unsigned int xid, struct cifs_tcon *tcon,
2576 __u8 *lease_key, const __le32 lease_state)
2577{
2578 int rc;
2579 struct smb2_lease_ack *req = NULL;
2580
Joe Perchesf96637b2013-05-04 22:12:25 -05002581 cifs_dbg(FYI, "SMB2_lease_break\n");
Pavel Shilovsky0822f512012-09-19 06:22:45 -07002582 rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req);
2583
2584 if (rc)
2585 return rc;
2586
2587 req->hdr.CreditRequest = cpu_to_le16(1);
2588 req->StructureSize = cpu_to_le16(36);
2589 inc_rfc1001_len(req, 12);
2590
2591 memcpy(req->LeaseKey, lease_key, 16);
2592 req->LeaseState = lease_state;
2593
2594 rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, CIFS_OBREAK_OP);
2595 /* SMB2 buffer freed by function above */
2596
2597 if (rc) {
2598 cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
Joe Perchesf96637b2013-05-04 22:12:25 -05002599 cifs_dbg(FYI, "Send error in Lease Break = %d\n", rc);
Pavel Shilovsky0822f512012-09-19 06:22:45 -07002600 }
2601
2602 return rc;
2603}