blob: e65f72d1f23bc4532f387762388cacd254e999b9 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * fs/cifs/connect.c
3 *
Steve Frenchd185cda2009-04-30 17:45:10 +00004 * Copyright (C) International Business Machines Corp., 2002,2009
Linus Torvalds1da177e2005-04-16 15:20:36 -07005 * Author(s): Steve French (sfrench@us.ibm.com)
6 *
7 * This library is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU Lesser General Public License as published
9 * by the Free Software Foundation; either version 2.1 of the License, or
10 * (at your option) any later version.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
15 * the GNU Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public License
18 * along with this library; if not, write to the Free Software
Steve Frenchfb8c4b12007-07-10 01:16:18 +000019 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Linus Torvalds1da177e2005-04-16 15:20:36 -070020 */
21#include <linux/fs.h>
22#include <linux/net.h>
23#include <linux/string.h>
24#include <linux/list.h>
25#include <linux/wait.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090026#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#include <linux/pagemap.h>
28#include <linux/ctype.h>
29#include <linux/utsname.h>
30#include <linux/mempool.h>
Steve Frenchb8643e12005-04-28 22:41:07 -070031#include <linux/delay.h>
Steve Frenchf1914012005-08-18 09:37:34 -070032#include <linux/completion.h>
Igor Mammedovaaf737a2007-04-03 19:16:43 +000033#include <linux/kthread.h>
Steve French0ae0efa2005-10-10 10:57:19 -070034#include <linux/pagevec.h>
Nigel Cunningham7dfb7102006-12-06 20:34:23 -080035#include <linux/freezer.h>
Igor Mammedov5c2503a2009-04-21 19:31:05 +040036#include <linux/namei.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070037#include <asm/uaccess.h>
38#include <asm/processor.h>
Jeff Layton50b64e32009-06-02 06:55:20 -040039#include <linux/inet.h>
Steve French0e2beda2009-01-30 21:24:41 +000040#include <net/ipv6.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070041#include "cifspdu.h"
42#include "cifsglob.h"
43#include "cifsproto.h"
44#include "cifs_unicode.h"
45#include "cifs_debug.h"
46#include "cifs_fs_sb.h"
47#include "ntlmssp.h"
48#include "nterr.h"
49#include "rfc1002pdu.h"
Suresh Jayaraman488f1d2d2010-07-05 18:12:15 +053050#include "fscache.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070051
52#define CIFS_PORT 445
53#define RFC1001_PORT 139
54
Linus Torvalds1da177e2005-04-16 15:20:36 -070055extern void SMBNTencrypt(unsigned char *passwd, unsigned char *c8,
56 unsigned char *p24);
57
58extern mempool_t *cifs_req_poolp;
59
60struct smb_vol {
61 char *username;
62 char *password;
63 char *domainname;
64 char *UNC;
65 char *UNCip;
Linus Torvalds1da177e2005-04-16 15:20:36 -070066 char *iocharset; /* local code page for mapping to and from Unicode */
67 char source_rfc1001_name[16]; /* netbios name of client */
Steve Frencha10faeb22005-08-22 21:38:31 -070068 char target_rfc1001_name[16]; /* netbios name of server for Win9x/ME */
Jeff Layton3e4b3e12010-07-19 18:00:17 -040069 uid_t cred_uid;
Linus Torvalds1da177e2005-04-16 15:20:36 -070070 uid_t linux_uid;
71 gid_t linux_gid;
72 mode_t file_mode;
73 mode_t dir_mode;
Steve French189acaa2006-06-23 02:33:48 +000074 unsigned secFlg;
Steve French4b18f2a2008-04-29 00:06:05 +000075 bool retry:1;
76 bool intr:1;
77 bool setuids:1;
78 bool override_uid:1;
79 bool override_gid:1;
Jeff Laytond0a9c072008-05-12 22:23:49 +000080 bool dynperm:1;
Steve French4b18f2a2008-04-29 00:06:05 +000081 bool noperm:1;
82 bool no_psx_acl:1; /* set if posix acl support should be disabled */
83 bool cifs_acl:1;
84 bool no_xattr:1; /* set if xattr (EA) support should be disabled*/
85 bool server_ino:1; /* use inode numbers from server ie UniqueId */
86 bool direct_io:1;
Steve French95b1cb92008-05-15 16:44:38 +000087 bool remap:1; /* set to remap seven reserved chars in filenames */
88 bool posix_paths:1; /* unset to not ask for posix pathnames. */
Steve French4b18f2a2008-04-29 00:06:05 +000089 bool no_linux_ext:1;
90 bool sfu_emul:1;
Steve French95b1cb92008-05-15 16:44:38 +000091 bool nullauth:1; /* attempt to authenticate with null user */
92 bool nocase:1; /* request case insensitive filenames */
93 bool nobrl:1; /* disable sending byte range locks to srv */
Steve French13a6e422008-12-02 17:24:33 +000094 bool mand_lock:1; /* send mandatory not posix byte range lock reqs */
Steve French95b1cb92008-05-15 16:44:38 +000095 bool seal:1; /* request transport encryption on share */
Steve French84210e92008-10-23 04:42:37 +000096 bool nodfs:1; /* Do not request DFS, even if available */
97 bool local_lease:1; /* check leases only on local system, not remote */
Steve Frenchedf1ae42008-10-29 00:47:57 +000098 bool noblocksnd:1;
99 bool noautotune:1;
Steve Frenchbe652442009-02-23 15:21:59 +0000100 bool nostrictsync:1; /* do not force expensive SMBflush on every sync */
Suresh Jayaramanfa1df752010-07-05 18:13:36 +0530101 bool fsc:1; /* enable fscache */
Stefan Metzmacher736a33202010-07-30 14:56:00 +0200102 bool mfsymlinks:1; /* use Minshall+French Symlinks */
Jeff Layton0eb8a132010-10-06 19:51:12 -0400103 bool multiuser:1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104 unsigned int rsize;
105 unsigned int wsize;
Steve French6a5fa2362010-01-01 01:28:43 +0000106 bool sockopt_tcp_nodelay:1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107 unsigned short int port;
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000108 char *prepath;
Ben Greear3eb9a882010-09-01 17:06:02 -0700109 struct sockaddr_storage srcaddr; /* allow binding to a local IP */
Jeff Laytona5fc4ce2010-04-24 07:57:42 -0400110 struct nls_table *local_nls;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111};
112
Jeff Layton9d002df2010-10-06 19:51:11 -0400113#define TLINK_ERROR_EXPIRE (1 * HZ)
114
115
Jeff Laytonbcf4b102008-12-01 18:42:15 -0500116static int ipv4_connect(struct TCP_Server_Info *server);
Jeff Laytond5c56052008-12-01 18:42:33 -0500117static int ipv6_connect(struct TCP_Server_Info *server);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118
Jeff Laytond5c56052008-12-01 18:42:33 -0500119/*
120 * cifs tcp session reconnection
121 *
122 * mark tcp session as reconnecting so temporarily locked
123 * mark all smb sessions as reconnecting for tcp session
124 * reconnect tcp session
125 * wake up waiters on reconnection? - (not needed currently)
126 */
Steve French2cd646a2006-09-28 19:43:08 +0000127static int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128cifs_reconnect(struct TCP_Server_Info *server)
129{
130 int rc = 0;
Jeff Laytonf1987b42008-11-15 11:12:47 -0500131 struct list_head *tmp, *tmp2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132 struct cifsSesInfo *ses;
133 struct cifsTconInfo *tcon;
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000134 struct mid_q_entry *mid_entry;
Steve French50c2f752007-07-13 00:33:32 +0000135
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136 spin_lock(&GlobalMid_Lock);
Jeff Layton469ee612008-10-16 18:46:39 +0000137 if (server->tcpStatus == CifsExiting) {
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000138 /* the demux thread will exit normally
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139 next time through the loop */
140 spin_unlock(&GlobalMid_Lock);
141 return rc;
142 } else
143 server->tcpStatus = CifsNeedReconnect;
144 spin_unlock(&GlobalMid_Lock);
145 server->maxBuf = 0;
146
Joe Perchesb6b38f72010-04-21 03:50:45 +0000147 cFYI(1, "Reconnecting tcp session");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148
149 /* before reconnecting the tcp session, mark the smb session (uid)
150 and the tid bad so they are not used until reconnected */
Jeff Layton14fbf502008-11-14 13:53:46 -0500151 read_lock(&cifs_tcp_ses_lock);
152 list_for_each(tmp, &server->smb_ses_list) {
153 ses = list_entry(tmp, struct cifsSesInfo, smb_ses_list);
154 ses->need_reconnect = true;
155 ses->ipc_tid = 0;
Jeff Laytonf1987b42008-11-15 11:12:47 -0500156 list_for_each(tmp2, &ses->tcon_list) {
157 tcon = list_entry(tmp2, struct cifsTconInfo, tcon_list);
158 tcon->need_reconnect = true;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160 }
Jeff Layton14fbf502008-11-14 13:53:46 -0500161 read_unlock(&cifs_tcp_ses_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162 /* do not want to be sending data on a socket we are freeing */
Jeff Layton72ca5452008-12-01 07:09:36 -0500163 mutex_lock(&server->srv_mutex);
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000164 if (server->ssocket) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000165 cFYI(1, "State: 0x%x Flags: 0x%lx", server->ssocket->state,
166 server->ssocket->flags);
Trond Myklebust91cf45f2007-11-12 18:10:39 -0800167 kernel_sock_shutdown(server->ssocket, SHUT_WR);
Joe Perchesb6b38f72010-04-21 03:50:45 +0000168 cFYI(1, "Post shutdown state: 0x%x Flags: 0x%lx",
Steve French467a8f82007-06-27 22:41:32 +0000169 server->ssocket->state,
Joe Perchesb6b38f72010-04-21 03:50:45 +0000170 server->ssocket->flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171 sock_release(server->ssocket);
172 server->ssocket = NULL;
173 }
174
175 spin_lock(&GlobalMid_Lock);
176 list_for_each(tmp, &server->pending_mid_q) {
177 mid_entry = list_entry(tmp, struct
178 mid_q_entry,
179 qhead);
Steve Frenchad8b15f2008-08-08 21:10:16 +0000180 if (mid_entry->midState == MID_REQUEST_SUBMITTED) {
Steve French09d1db52005-04-28 22:41:08 -0700181 /* Mark other intransit requests as needing
182 retry so we do not immediately mark the
183 session bad again (ie after we reconnect
184 below) as they timeout too */
Steve Frenchad8b15f2008-08-08 21:10:16 +0000185 mid_entry->midState = MID_RETRY_NEEDED;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186 }
187 }
188 spin_unlock(&GlobalMid_Lock);
Jeff Layton72ca5452008-12-01 07:09:36 -0500189 mutex_unlock(&server->srv_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190
Jeff Layton469ee612008-10-16 18:46:39 +0000191 while ((server->tcpStatus != CifsExiting) &&
192 (server->tcpStatus != CifsGood)) {
Steve French6c3d8902006-07-31 22:46:20 +0000193 try_to_freeze();
Jeff Laytonbcf4b102008-12-01 18:42:15 -0500194 if (server->addr.sockAddr6.sin6_family == AF_INET6)
Jeff Laytond5c56052008-12-01 18:42:33 -0500195 rc = ipv6_connect(server);
Jeff Laytonbcf4b102008-12-01 18:42:15 -0500196 else
197 rc = ipv4_connect(server);
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000198 if (rc) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000199 cFYI(1, "reconnect error %d", rc);
Steve French0cb766a2005-04-28 22:41:11 -0700200 msleep(3000);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201 } else {
202 atomic_inc(&tcpSesReconnectCount);
203 spin_lock(&GlobalMid_Lock);
Jeff Layton469ee612008-10-16 18:46:39 +0000204 if (server->tcpStatus != CifsExiting)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205 server->tcpStatus = CifsGood;
Steve Frenchad009ac2005-04-28 22:41:05 -0700206 server->sequence_number = 0;
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000207 spin_unlock(&GlobalMid_Lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208 /* atomic_set(&server->inFlight,0);*/
209 wake_up(&server->response_q);
210 }
211 }
212 return rc;
213}
214
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000215/*
Steve Frenche4eb2952005-04-28 22:41:09 -0700216 return codes:
217 0 not a transact2, or all data present
218 >0 transact2 with that much data missing
219 -EINVAL = invalid transact2
220
221 */
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000222static int check2ndT2(struct smb_hdr *pSMB, unsigned int maxBufSize)
Steve Frenche4eb2952005-04-28 22:41:09 -0700223{
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000224 struct smb_t2_rsp *pSMBt;
225 int total_data_size;
Steve Frenche4eb2952005-04-28 22:41:09 -0700226 int data_in_this_rsp;
227 int remaining;
228
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000229 if (pSMB->Command != SMB_COM_TRANSACTION2)
Steve Frenche4eb2952005-04-28 22:41:09 -0700230 return 0;
231
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000232 /* check for plausible wct, bcc and t2 data and parm sizes */
233 /* check for parm and data offset going beyond end of smb */
234 if (pSMB->WordCount != 10) { /* coalesce_t2 depends on this */
Joe Perchesb6b38f72010-04-21 03:50:45 +0000235 cFYI(1, "invalid transact2 word count");
Steve Frenche4eb2952005-04-28 22:41:09 -0700236 return -EINVAL;
237 }
238
239 pSMBt = (struct smb_t2_rsp *)pSMB;
240
241 total_data_size = le16_to_cpu(pSMBt->t2_rsp.TotalDataCount);
242 data_in_this_rsp = le16_to_cpu(pSMBt->t2_rsp.DataCount);
243
244 remaining = total_data_size - data_in_this_rsp;
245
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000246 if (remaining == 0)
Steve Frenche4eb2952005-04-28 22:41:09 -0700247 return 0;
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000248 else if (remaining < 0) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000249 cFYI(1, "total data %d smaller than data in frame %d",
250 total_data_size, data_in_this_rsp);
Steve Frenche4eb2952005-04-28 22:41:09 -0700251 return -EINVAL;
252 } else {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000253 cFYI(1, "missing %d bytes from transact2, check next response",
254 remaining);
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000255 if (total_data_size > maxBufSize) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000256 cERROR(1, "TotalDataSize %d is over maximum buffer %d",
257 total_data_size, maxBufSize);
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000258 return -EINVAL;
Steve Frenche4eb2952005-04-28 22:41:09 -0700259 }
260 return remaining;
261 }
262}
263
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000264static int coalesce_t2(struct smb_hdr *psecond, struct smb_hdr *pTargetSMB)
Steve Frenche4eb2952005-04-28 22:41:09 -0700265{
266 struct smb_t2_rsp *pSMB2 = (struct smb_t2_rsp *)psecond;
267 struct smb_t2_rsp *pSMBt = (struct smb_t2_rsp *)pTargetSMB;
268 int total_data_size;
269 int total_in_buf;
270 int remaining;
271 int total_in_buf2;
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000272 char *data_area_of_target;
273 char *data_area_of_buf2;
Steve Frenche4eb2952005-04-28 22:41:09 -0700274 __u16 byte_count;
275
276 total_data_size = le16_to_cpu(pSMBt->t2_rsp.TotalDataCount);
277
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000278 if (total_data_size != le16_to_cpu(pSMB2->t2_rsp.TotalDataCount)) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000279 cFYI(1, "total data size of primary and secondary t2 differ");
Steve Frenche4eb2952005-04-28 22:41:09 -0700280 }
281
282 total_in_buf = le16_to_cpu(pSMBt->t2_rsp.DataCount);
283
284 remaining = total_data_size - total_in_buf;
Steve French50c2f752007-07-13 00:33:32 +0000285
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000286 if (remaining < 0)
Steve Frenche4eb2952005-04-28 22:41:09 -0700287 return -EINVAL;
288
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000289 if (remaining == 0) /* nothing to do, ignore */
Steve Frenche4eb2952005-04-28 22:41:09 -0700290 return 0;
Steve French50c2f752007-07-13 00:33:32 +0000291
Steve Frenche4eb2952005-04-28 22:41:09 -0700292 total_in_buf2 = le16_to_cpu(pSMB2->t2_rsp.DataCount);
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000293 if (remaining < total_in_buf2) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000294 cFYI(1, "transact2 2nd response contains too much data");
Steve Frenche4eb2952005-04-28 22:41:09 -0700295 }
296
297 /* find end of first SMB data area */
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000298 data_area_of_target = (char *)&pSMBt->hdr.Protocol +
Steve Frenche4eb2952005-04-28 22:41:09 -0700299 le16_to_cpu(pSMBt->t2_rsp.DataOffset);
300 /* validate target area */
301
302 data_area_of_buf2 = (char *) &pSMB2->hdr.Protocol +
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000303 le16_to_cpu(pSMB2->t2_rsp.DataOffset);
Steve Frenche4eb2952005-04-28 22:41:09 -0700304
305 data_area_of_target += total_in_buf;
306
307 /* copy second buffer into end of first buffer */
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000308 memcpy(data_area_of_target, data_area_of_buf2, total_in_buf2);
Steve Frenche4eb2952005-04-28 22:41:09 -0700309 total_in_buf += total_in_buf2;
310 pSMBt->t2_rsp.DataCount = cpu_to_le16(total_in_buf);
311 byte_count = le16_to_cpu(BCC_LE(pTargetSMB));
312 byte_count += total_in_buf2;
313 BCC_LE(pTargetSMB) = cpu_to_le16(byte_count);
314
Steve French70ca7342005-09-22 16:32:06 -0700315 byte_count = pTargetSMB->smb_buf_length;
Steve Frenche4eb2952005-04-28 22:41:09 -0700316 byte_count += total_in_buf2;
317
318 /* BB also add check that we are not beyond maximum buffer size */
Steve French50c2f752007-07-13 00:33:32 +0000319
Steve French70ca7342005-09-22 16:32:06 -0700320 pTargetSMB->smb_buf_length = byte_count;
Steve Frenche4eb2952005-04-28 22:41:09 -0700321
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000322 if (remaining == total_in_buf2) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000323 cFYI(1, "found the last secondary response");
Steve Frenche4eb2952005-04-28 22:41:09 -0700324 return 0; /* we are done */
325 } else /* more responses to go */
326 return 1;
327
328}
329
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330static int
331cifs_demultiplex_thread(struct TCP_Server_Info *server)
332{
333 int length;
334 unsigned int pdu_length, total_read;
335 struct smb_hdr *smb_buffer = NULL;
Steve Frenchb8643e12005-04-28 22:41:07 -0700336 struct smb_hdr *bigbuf = NULL;
337 struct smb_hdr *smallbuf = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338 struct msghdr smb_msg;
339 struct kvec iov;
340 struct socket *csocket = server->ssocket;
341 struct list_head *tmp;
342 struct cifsSesInfo *ses;
343 struct task_struct *task_to_wake = NULL;
344 struct mid_q_entry *mid_entry;
Steve French70ca7342005-09-22 16:32:06 -0700345 char temp;
Steve French4b18f2a2008-04-29 00:06:05 +0000346 bool isLargeBuf = false;
347 bool isMultiRsp;
Steve Frenche4eb2952005-04-28 22:41:09 -0700348 int reconnect;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350 current->flags |= PF_MEMALLOC;
Joe Perchesb6b38f72010-04-21 03:50:45 +0000351 cFYI(1, "Demultiplex PID: %d", task_pid_nr(current));
Jeff Layton93d0ec82008-08-02 08:00:48 -0400352
353 length = atomic_inc_return(&tcpSesAllocCount);
354 if (length > 1)
Steve French26f57362007-08-30 22:09:15 +0000355 mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
356 GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357
Rafael J. Wysocki83144182007-07-17 04:03:35 -0700358 set_freezable();
Jeff Layton469ee612008-10-16 18:46:39 +0000359 while (server->tcpStatus != CifsExiting) {
Steve Frenchede13272005-08-30 20:10:14 -0700360 if (try_to_freeze())
361 continue;
Steve Frenchb8643e12005-04-28 22:41:07 -0700362 if (bigbuf == NULL) {
363 bigbuf = cifs_buf_get();
Pavel Machek0fd1ffe2006-06-13 21:31:39 +0000364 if (!bigbuf) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000365 cERROR(1, "No memory for large SMB response");
Steve Frenchb8643e12005-04-28 22:41:07 -0700366 msleep(3000);
367 /* retry will check if exiting */
368 continue;
369 }
Pavel Machek0fd1ffe2006-06-13 21:31:39 +0000370 } else if (isLargeBuf) {
371 /* we are reusing a dirty large buf, clear its start */
Steve French26f57362007-08-30 22:09:15 +0000372 memset(bigbuf, 0, sizeof(struct smb_hdr));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373 }
Steve Frenchb8643e12005-04-28 22:41:07 -0700374
375 if (smallbuf == NULL) {
376 smallbuf = cifs_small_buf_get();
Pavel Machek0fd1ffe2006-06-13 21:31:39 +0000377 if (!smallbuf) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000378 cERROR(1, "No memory for SMB response");
Steve Frenchb8643e12005-04-28 22:41:07 -0700379 msleep(1000);
380 /* retry will check if exiting */
381 continue;
382 }
383 /* beginning of smb buffer is cleared in our buf_get */
384 } else /* if existing small buf clear beginning */
Steve French26f57362007-08-30 22:09:15 +0000385 memset(smallbuf, 0, sizeof(struct smb_hdr));
Steve Frenchb8643e12005-04-28 22:41:07 -0700386
Steve French4b18f2a2008-04-29 00:06:05 +0000387 isLargeBuf = false;
388 isMultiRsp = false;
Steve Frenchb8643e12005-04-28 22:41:07 -0700389 smb_buffer = smallbuf;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390 iov.iov_base = smb_buffer;
391 iov.iov_len = 4;
392 smb_msg.msg_control = NULL;
393 smb_msg.msg_controllen = 0;
Steve Frenchf01d5e12007-08-30 21:13:31 +0000394 pdu_length = 4; /* enough to get RFC1001 header */
395incomplete_rcv:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396 length =
397 kernel_recvmsg(csocket, &smb_msg,
Steve Frenchf01d5e12007-08-30 21:13:31 +0000398 &iov, 1, pdu_length, 0 /* BB other flags? */);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399
Jeff Layton469ee612008-10-16 18:46:39 +0000400 if (server->tcpStatus == CifsExiting) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401 break;
402 } else if (server->tcpStatus == CifsNeedReconnect) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000403 cFYI(1, "Reconnect after server stopped responding");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700404 cifs_reconnect(server);
Joe Perchesb6b38f72010-04-21 03:50:45 +0000405 cFYI(1, "call to reconnect done");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406 csocket = server->ssocket;
407 continue;
Jeff Layton522bbe62010-09-03 12:00:49 -0400408 } else if (length == -ERESTARTSYS ||
409 length == -EAGAIN ||
410 length == -EINTR) {
Steve Frenchb8643e12005-04-28 22:41:07 -0700411 msleep(1); /* minimum sleep to prevent looping
Linus Torvalds1da177e2005-04-16 15:20:36 -0700412 allowing socket to clear and app threads to set
413 tcpStatus CifsNeedReconnect if server hung */
Steve Frenchc527c8a2008-11-03 20:46:21 +0000414 if (pdu_length < 4) {
415 iov.iov_base = (4 - pdu_length) +
416 (char *)smb_buffer;
417 iov.iov_len = pdu_length;
418 smb_msg.msg_control = NULL;
419 smb_msg.msg_controllen = 0;
Steve Frenchc18c7322007-10-17 18:01:11 +0000420 goto incomplete_rcv;
Steve Frenchc527c8a2008-11-03 20:46:21 +0000421 } else
Steve Frenchc18c7322007-10-17 18:01:11 +0000422 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423 } else if (length <= 0) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000424 cFYI(1, "Reconnect after unexpected peek error %d",
425 length);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700426 cifs_reconnect(server);
427 csocket = server->ssocket;
428 wake_up(&server->response_q);
429 continue;
Petr Tesarik2a974682007-11-20 02:24:08 +0000430 } else if (length < pdu_length) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000431 cFYI(1, "requested %d bytes but only got %d bytes",
432 pdu_length, length);
Steve Frenchf01d5e12007-08-30 21:13:31 +0000433 pdu_length -= length;
Steve Frenchf01d5e12007-08-30 21:13:31 +0000434 msleep(1);
435 goto incomplete_rcv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436 }
Steve French67010fb2005-04-28 22:41:09 -0700437
Steve French70ca7342005-09-22 16:32:06 -0700438 /* The right amount was read from socket - 4 bytes */
439 /* so we can now interpret the length field */
Steve French46810cb2005-04-28 22:41:09 -0700440
Steve French70ca7342005-09-22 16:32:06 -0700441 /* the first byte big endian of the length field,
442 is actually not part of the length but the type
443 with the most common, zero, as regular data */
444 temp = *((char *) smb_buffer);
445
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000446 /* Note that FC 1001 length is big endian on the wire,
Steve French70ca7342005-09-22 16:32:06 -0700447 but we convert it here so it is always manipulated
448 as host byte order */
Harvey Harrison5ca33c62008-07-23 17:45:58 -0700449 pdu_length = be32_to_cpu((__force __be32)smb_buffer->smb_buf_length);
Steve French70ca7342005-09-22 16:32:06 -0700450 smb_buffer->smb_buf_length = pdu_length;
Steve French46810cb2005-04-28 22:41:09 -0700451
Joe Perchesb6b38f72010-04-21 03:50:45 +0000452 cFYI(1, "rfc1002 length 0x%x", pdu_length+4);
Steve French70ca7342005-09-22 16:32:06 -0700453
454 if (temp == (char) RFC1002_SESSION_KEEP_ALIVE) {
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000455 continue;
Steve French70ca7342005-09-22 16:32:06 -0700456 } else if (temp == (char)RFC1002_POSITIVE_SESSION_RESPONSE) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000457 cFYI(1, "Good RFC 1002 session rsp");
Steve Frenche4eb2952005-04-28 22:41:09 -0700458 continue;
Steve French70ca7342005-09-22 16:32:06 -0700459 } else if (temp == (char)RFC1002_NEGATIVE_SESSION_RESPONSE) {
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000460 /* we get this from Windows 98 instead of
Steve French46810cb2005-04-28 22:41:09 -0700461 an error on SMB negprot response */
Joe Perchesb6b38f72010-04-21 03:50:45 +0000462 cFYI(1, "Negative RFC1002 Session Response Error 0x%x)",
463 pdu_length);
Jeff Layton7332f2a2010-09-03 12:00:49 -0400464 /* give server a second to clean up */
465 msleep(1000);
466 /* always try 445 first on reconnect since we get NACK
467 * on some if we ever connected to port 139 (the NACK
468 * is since we do not begin with RFC1001 session
469 * initialize frame)
470 */
Jeff Layton32670392010-09-03 12:00:50 -0400471 cifs_set_port((struct sockaddr *)
472 &server->addr.sockAddr, CIFS_PORT);
Jeff Layton7332f2a2010-09-03 12:00:49 -0400473 cifs_reconnect(server);
474 csocket = server->ssocket;
475 wake_up(&server->response_q);
476 continue;
Steve French70ca7342005-09-22 16:32:06 -0700477 } else if (temp != (char) 0) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000478 cERROR(1, "Unknown RFC 1002 frame");
Steve French70ca7342005-09-22 16:32:06 -0700479 cifs_dump_mem(" Received Data: ", (char *)smb_buffer,
480 length);
Steve French46810cb2005-04-28 22:41:09 -0700481 cifs_reconnect(server);
482 csocket = server->ssocket;
483 continue;
Steve Frenche4eb2952005-04-28 22:41:09 -0700484 }
485
486 /* else we have an SMB response */
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000487 if ((pdu_length > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) ||
Steve French26f57362007-08-30 22:09:15 +0000488 (pdu_length < sizeof(struct smb_hdr) - 1 - 4)) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000489 cERROR(1, "Invalid size SMB length %d pdu_length %d",
490 length, pdu_length+4);
Steve Frenche4eb2952005-04-28 22:41:09 -0700491 cifs_reconnect(server);
492 csocket = server->ssocket;
493 wake_up(&server->response_q);
494 continue;
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000495 }
Steve Frenche4eb2952005-04-28 22:41:09 -0700496
497 /* else length ok */
498 reconnect = 0;
499
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000500 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) {
Steve French4b18f2a2008-04-29 00:06:05 +0000501 isLargeBuf = true;
Steve Frenche4eb2952005-04-28 22:41:09 -0700502 memcpy(bigbuf, smallbuf, 4);
503 smb_buffer = bigbuf;
504 }
505 length = 0;
506 iov.iov_base = 4 + (char *)smb_buffer;
507 iov.iov_len = pdu_length;
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000508 for (total_read = 0; total_read < pdu_length;
Steve Frenche4eb2952005-04-28 22:41:09 -0700509 total_read += length) {
510 length = kernel_recvmsg(csocket, &smb_msg, &iov, 1,
511 pdu_length - total_read, 0);
Jeff Layton522bbe62010-09-03 12:00:49 -0400512 if (server->tcpStatus == CifsExiting) {
Steve Frenche4eb2952005-04-28 22:41:09 -0700513 /* then will exit */
514 reconnect = 2;
515 break;
516 } else if (server->tcpStatus == CifsNeedReconnect) {
Steve French46810cb2005-04-28 22:41:09 -0700517 cifs_reconnect(server);
518 csocket = server->ssocket;
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000519 /* Reconnect wakes up rspns q */
Steve Frenche4eb2952005-04-28 22:41:09 -0700520 /* Now we will reread sock */
521 reconnect = 1;
522 break;
Jeff Layton522bbe62010-09-03 12:00:49 -0400523 } else if (length == -ERESTARTSYS ||
524 length == -EAGAIN ||
525 length == -EINTR) {
Steve Frenche4eb2952005-04-28 22:41:09 -0700526 msleep(1); /* minimum sleep to prevent looping,
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000527 allowing socket to clear and app
Steve Frenche4eb2952005-04-28 22:41:09 -0700528 threads to set tcpStatus
529 CifsNeedReconnect if server hung*/
Steve Frenchc18c7322007-10-17 18:01:11 +0000530 length = 0;
Steve French46810cb2005-04-28 22:41:09 -0700531 continue;
Steve Frenche4eb2952005-04-28 22:41:09 -0700532 } else if (length <= 0) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000533 cERROR(1, "Received no data, expecting %d",
534 pdu_length - total_read);
Steve Frenche4eb2952005-04-28 22:41:09 -0700535 cifs_reconnect(server);
536 csocket = server->ssocket;
537 reconnect = 1;
538 break;
Steve French46810cb2005-04-28 22:41:09 -0700539 }
540 }
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000541 if (reconnect == 2)
Steve Frenche4eb2952005-04-28 22:41:09 -0700542 break;
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000543 else if (reconnect == 1)
Steve Frenche4eb2952005-04-28 22:41:09 -0700544 continue;
545
546 length += 4; /* account for rfc1002 hdr */
Steve French50c2f752007-07-13 00:33:32 +0000547
Steve Frenche4eb2952005-04-28 22:41:09 -0700548
549 dump_smb(smb_buffer, length);
Steve French184ed212006-02-24 06:15:11 +0000550 if (checkSMB(smb_buffer, smb_buffer->Mid, total_read+4)) {
Steve Frenchb387eae2005-10-10 14:21:15 -0700551 cifs_dump_mem("Bad SMB: ", smb_buffer, 48);
Steve Frenche4eb2952005-04-28 22:41:09 -0700552 continue;
553 }
554
555
556 task_to_wake = NULL;
557 spin_lock(&GlobalMid_Lock);
558 list_for_each(tmp, &server->pending_mid_q) {
559 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
560
Steve French50c2f752007-07-13 00:33:32 +0000561 if ((mid_entry->mid == smb_buffer->Mid) &&
Steve Frenche4eb2952005-04-28 22:41:09 -0700562 (mid_entry->midState == MID_REQUEST_SUBMITTED) &&
563 (mid_entry->command == smb_buffer->Command)) {
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000564 if (check2ndT2(smb_buffer,server->maxBuf) > 0) {
Steve Frenche4eb2952005-04-28 22:41:09 -0700565 /* We have a multipart transact2 resp */
Steve French4b18f2a2008-04-29 00:06:05 +0000566 isMultiRsp = true;
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000567 if (mid_entry->resp_buf) {
Steve Frenche4eb2952005-04-28 22:41:09 -0700568 /* merge response - fix up 1st*/
Steve French50c2f752007-07-13 00:33:32 +0000569 if (coalesce_t2(smb_buffer,
Steve Frenche4eb2952005-04-28 22:41:09 -0700570 mid_entry->resp_buf)) {
Steve French4b18f2a2008-04-29 00:06:05 +0000571 mid_entry->multiRsp =
572 true;
Steve Frenche4eb2952005-04-28 22:41:09 -0700573 break;
574 } else {
575 /* all parts received */
Steve French4b18f2a2008-04-29 00:06:05 +0000576 mid_entry->multiEnd =
577 true;
Steve French50c2f752007-07-13 00:33:32 +0000578 goto multi_t2_fnd;
Steve Frenche4eb2952005-04-28 22:41:09 -0700579 }
580 } else {
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000581 if (!isLargeBuf) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000582 cERROR(1, "1st trans2 resp needs bigbuf");
Steve Frenche4eb2952005-04-28 22:41:09 -0700583 /* BB maybe we can fix this up, switch
Steve French50c2f752007-07-13 00:33:32 +0000584 to already allocated large buffer? */
Steve Frenche4eb2952005-04-28 22:41:09 -0700585 } else {
Steve Frenchcd634992005-04-28 22:41:10 -0700586 /* Have first buffer */
Steve Frenche4eb2952005-04-28 22:41:09 -0700587 mid_entry->resp_buf =
588 smb_buffer;
Steve French4b18f2a2008-04-29 00:06:05 +0000589 mid_entry->largeBuf =
590 true;
Steve Frenche4eb2952005-04-28 22:41:09 -0700591 bigbuf = NULL;
592 }
593 }
594 break;
Steve French50c2f752007-07-13 00:33:32 +0000595 }
Steve Frenche4eb2952005-04-28 22:41:09 -0700596 mid_entry->resp_buf = smb_buffer;
Steve French4b18f2a2008-04-29 00:06:05 +0000597 mid_entry->largeBuf = isLargeBuf;
Steve Frenche4eb2952005-04-28 22:41:09 -0700598multi_t2_fnd:
599 task_to_wake = mid_entry->tsk;
600 mid_entry->midState = MID_RESPONSE_RECEIVED;
Steve French1047abc2005-10-11 19:58:06 -0700601#ifdef CONFIG_CIFS_STATS2
602 mid_entry->when_received = jiffies;
603#endif
Steve French3a5ff612006-07-14 22:37:11 +0000604 /* so we do not time out requests to server
605 which is still responding (since server could
606 be busy but not dead) */
607 server->lstrp = jiffies;
Steve Frenche4eb2952005-04-28 22:41:09 -0700608 break;
609 }
610 }
611 spin_unlock(&GlobalMid_Lock);
612 if (task_to_wake) {
Steve Frenchcd634992005-04-28 22:41:10 -0700613 /* Was previous buf put in mpx struct for multi-rsp? */
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000614 if (!isMultiRsp) {
Steve Frenchcd634992005-04-28 22:41:10 -0700615 /* smb buffer will be freed by user thread */
Steve French26f57362007-08-30 22:09:15 +0000616 if (isLargeBuf)
Steve Frenchcd634992005-04-28 22:41:10 -0700617 bigbuf = NULL;
Steve French26f57362007-08-30 22:09:15 +0000618 else
Steve Frenchcd634992005-04-28 22:41:10 -0700619 smallbuf = NULL;
620 }
Steve Frenche4eb2952005-04-28 22:41:09 -0700621 wake_up_process(task_to_wake);
Steve French4b18f2a2008-04-29 00:06:05 +0000622 } else if (!is_valid_oplock_break(smb_buffer, server) &&
623 !isMultiRsp) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000624 cERROR(1, "No task to wake, unknown frame received! "
625 "NumMids %d", midCount.counter);
Steve French50c2f752007-07-13 00:33:32 +0000626 cifs_dump_mem("Received Data is: ", (char *)smb_buffer,
Steve French70ca7342005-09-22 16:32:06 -0700627 sizeof(struct smb_hdr));
Steve French39798772006-05-31 22:40:51 +0000628#ifdef CONFIG_CIFS_DEBUG2
629 cifs_dump_detail(smb_buffer);
630 cifs_dump_mids(server);
631#endif /* CIFS_DEBUG2 */
Steve French50c2f752007-07-13 00:33:32 +0000632
Steve Frenche4eb2952005-04-28 22:41:09 -0700633 }
634 } /* end while !EXITING */
635
Jeff Laytone7ddee92008-11-14 13:44:38 -0500636 /* take it off the list, if it's not already */
637 write_lock(&cifs_tcp_ses_lock);
638 list_del_init(&server->tcp_ses_list);
639 write_unlock(&cifs_tcp_ses_lock);
640
Linus Torvalds1da177e2005-04-16 15:20:36 -0700641 spin_lock(&GlobalMid_Lock);
642 server->tcpStatus = CifsExiting;
Steve Frenche691b9d2008-05-11 15:53:33 +0000643 spin_unlock(&GlobalMid_Lock);
Steve Frenchdbdbb872008-06-10 21:21:56 +0000644 wake_up_all(&server->response_q);
Steve Frenche691b9d2008-05-11 15:53:33 +0000645
Steve French31ca3bc2005-04-28 22:41:11 -0700646 /* check if we have blocked requests that need to free */
647 /* Note that cifs_max_pending is normally 50, but
648 can be set at module install time to as little as two */
Steve Frenche691b9d2008-05-11 15:53:33 +0000649 spin_lock(&GlobalMid_Lock);
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000650 if (atomic_read(&server->inFlight) >= cifs_max_pending)
Steve French31ca3bc2005-04-28 22:41:11 -0700651 atomic_set(&server->inFlight, cifs_max_pending - 1);
652 /* We do not want to set the max_pending too low or we
653 could end up with the counter going negative */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700654 spin_unlock(&GlobalMid_Lock);
Steve French50c2f752007-07-13 00:33:32 +0000655 /* Although there should not be any requests blocked on
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656 this queue it can not hurt to be paranoid and try to wake up requests
Steve French09d1db52005-04-28 22:41:08 -0700657 that may haven been blocked when more than 50 at time were on the wire
Linus Torvalds1da177e2005-04-16 15:20:36 -0700658 to the same server - they now will see the session is in exit state
659 and get out of SendReceive. */
660 wake_up_all(&server->request_q);
661 /* give those requests time to exit */
Steve Frenchb8643e12005-04-28 22:41:07 -0700662 msleep(125);
Steve French50c2f752007-07-13 00:33:32 +0000663
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000664 if (server->ssocket) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700665 sock_release(csocket);
666 server->ssocket = NULL;
667 }
Steve Frenchb8643e12005-04-28 22:41:07 -0700668 /* buffer usuallly freed in free_mid - need to free it here on exit */
Mariusz Kozlowskia8a11d32007-10-03 16:41:24 +0000669 cifs_buf_release(bigbuf);
670 if (smallbuf) /* no sense logging a debug message if NULL */
Steve Frenchb8643e12005-04-28 22:41:07 -0700671 cifs_small_buf_release(smallbuf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700672
Jeff Layton14fbf502008-11-14 13:53:46 -0500673 /*
674 * BB: we shouldn't have to do any of this. It shouldn't be
675 * possible to exit from the thread with active SMB sessions
676 */
677 read_lock(&cifs_tcp_ses_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700678 if (list_empty(&server->pending_mid_q)) {
Steve French09d1db52005-04-28 22:41:08 -0700679 /* loop through server session structures attached to this and
680 mark them dead */
Jeff Layton14fbf502008-11-14 13:53:46 -0500681 list_for_each(tmp, &server->smb_ses_list) {
682 ses = list_entry(tmp, struct cifsSesInfo,
683 smb_ses_list);
684 ses->status = CifsExiting;
685 ses->server = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700686 }
Jeff Layton14fbf502008-11-14 13:53:46 -0500687 read_unlock(&cifs_tcp_ses_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700688 } else {
Steve French31ca3bc2005-04-28 22:41:11 -0700689 /* although we can not zero the server struct pointer yet,
690 since there are active requests which may depnd on them,
691 mark the corresponding SMB sessions as exiting too */
Jeff Layton14fbf502008-11-14 13:53:46 -0500692 list_for_each(tmp, &server->smb_ses_list) {
Steve French31ca3bc2005-04-28 22:41:11 -0700693 ses = list_entry(tmp, struct cifsSesInfo,
Jeff Layton14fbf502008-11-14 13:53:46 -0500694 smb_ses_list);
695 ses->status = CifsExiting;
Steve French31ca3bc2005-04-28 22:41:11 -0700696 }
697
Linus Torvalds1da177e2005-04-16 15:20:36 -0700698 spin_lock(&GlobalMid_Lock);
699 list_for_each(tmp, &server->pending_mid_q) {
700 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
701 if (mid_entry->midState == MID_REQUEST_SUBMITTED) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000702 cFYI(1, "Clearing Mid 0x%x - waking up ",
703 mid_entry->mid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700704 task_to_wake = mid_entry->tsk;
Steve French26f57362007-08-30 22:09:15 +0000705 if (task_to_wake)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700706 wake_up_process(task_to_wake);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700707 }
708 }
709 spin_unlock(&GlobalMid_Lock);
Jeff Layton14fbf502008-11-14 13:53:46 -0500710 read_unlock(&cifs_tcp_ses_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700711 /* 1/8th of sec is more than enough time for them to exit */
Steve Frenchb8643e12005-04-28 22:41:07 -0700712 msleep(125);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700713 }
714
Steve Frenchf1914012005-08-18 09:37:34 -0700715 if (!list_empty(&server->pending_mid_q)) {
Steve French50c2f752007-07-13 00:33:32 +0000716 /* mpx threads have not exited yet give them
Linus Torvalds1da177e2005-04-16 15:20:36 -0700717 at least the smb send timeout time for long ops */
Steve French31ca3bc2005-04-28 22:41:11 -0700718 /* due to delays on oplock break requests, we need
719 to wait at least 45 seconds before giving up
720 on a request getting a response and going ahead
721 and killing cifsd */
Joe Perchesb6b38f72010-04-21 03:50:45 +0000722 cFYI(1, "Wait for exit from demultiplex thread");
Steve French31ca3bc2005-04-28 22:41:11 -0700723 msleep(46000);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700724 /* if threads still have not exited they are probably never
725 coming home not much else we can do but free the memory */
726 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700727
Steve French31ca3bc2005-04-28 22:41:11 -0700728 /* last chance to mark ses pointers invalid
729 if there are any pointing to this (e.g
Steve French50c2f752007-07-13 00:33:32 +0000730 if a crazy root user tried to kill cifsd
Steve French31ca3bc2005-04-28 22:41:11 -0700731 kernel thread explicitly this might happen) */
Jeff Layton14fbf502008-11-14 13:53:46 -0500732 /* BB: This shouldn't be necessary, see above */
733 read_lock(&cifs_tcp_ses_lock);
734 list_for_each(tmp, &server->smb_ses_list) {
735 ses = list_entry(tmp, struct cifsSesInfo, smb_ses_list);
736 ses->server = NULL;
Steve French31ca3bc2005-04-28 22:41:11 -0700737 }
Jeff Layton14fbf502008-11-14 13:53:46 -0500738 read_unlock(&cifs_tcp_ses_lock);
Steve French31ca3bc2005-04-28 22:41:11 -0700739
Jeff Laytonc359cf32007-11-16 22:22:06 +0000740 kfree(server->hostname);
Jeff Laytonb1c8d2b2008-10-22 13:57:07 -0400741 task_to_wake = xchg(&server->tsk, NULL);
Steve French31ca3bc2005-04-28 22:41:11 -0700742 kfree(server);
Jeff Layton93d0ec82008-08-02 08:00:48 -0400743
744 length = atomic_dec_return(&tcpSesAllocCount);
Steve French26f57362007-08-30 22:09:15 +0000745 if (length > 0)
746 mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
747 GFP_KERNEL);
Steve French50c2f752007-07-13 00:33:32 +0000748
Jeff Laytonb1c8d2b2008-10-22 13:57:07 -0400749 /* if server->tsk was NULL then wait for a signal before exiting */
750 if (!task_to_wake) {
751 set_current_state(TASK_INTERRUPTIBLE);
752 while (!signal_pending(current)) {
753 schedule();
754 set_current_state(TASK_INTERRUPTIBLE);
755 }
756 set_current_state(TASK_RUNNING);
757 }
758
Jeff Layton0468a2c2008-12-01 07:09:35 -0500759 module_put_and_exit(0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700760}
761
Jeff Laytonc359cf32007-11-16 22:22:06 +0000762/* extract the host portion of the UNC string */
763static char *
764extract_hostname(const char *unc)
765{
766 const char *src;
767 char *dst, *delim;
768 unsigned int len;
769
770 /* skip double chars at beginning of string */
771 /* BB: check validity of these bytes? */
772 src = unc + 2;
773
774 /* delimiter between hostname and sharename is always '\\' now */
775 delim = strchr(src, '\\');
776 if (!delim)
777 return ERR_PTR(-EINVAL);
778
779 len = delim - src;
780 dst = kmalloc((len + 1), GFP_KERNEL);
781 if (dst == NULL)
782 return ERR_PTR(-ENOMEM);
783
784 memcpy(dst, src, len);
785 dst[len] = '\0';
786
787 return dst;
788}
789
Linus Torvalds1da177e2005-04-16 15:20:36 -0700790static int
Steve French50c2f752007-07-13 00:33:32 +0000791cifs_parse_mount_options(char *options, const char *devname,
792 struct smb_vol *vol)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700793{
794 char *value;
795 char *data;
796 unsigned int temp_len, i, j;
797 char separator[2];
Jeff Layton9b9d6b242009-07-31 06:56:09 -0400798 short int override_uid = -1;
799 short int override_gid = -1;
800 bool uid_specified = false;
801 bool gid_specified = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700802
803 separator[0] = ',';
Steve French50c2f752007-07-13 00:33:32 +0000804 separator[1] = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700805
Linus Torvalds12e36b22006-10-13 08:09:29 -0700806 if (Local_System_Name[0] != 0)
Steve French50c2f752007-07-13 00:33:32 +0000807 memcpy(vol->source_rfc1001_name, Local_System_Name, 15);
Steve French2cd646a2006-09-28 19:43:08 +0000808 else {
Linus Torvalds12e36b22006-10-13 08:09:29 -0700809 char *nodename = utsname()->nodename;
Steve French50c2f752007-07-13 00:33:32 +0000810 int n = strnlen(nodename, 15);
811 memset(vol->source_rfc1001_name, 0x20, 15);
812 for (i = 0; i < n; i++) {
Steve French2cd646a2006-09-28 19:43:08 +0000813 /* does not have to be perfect mapping since field is
814 informational, only used for servers that do not support
815 port 445 and it can be overridden at mount time */
Linus Torvalds12e36b22006-10-13 08:09:29 -0700816 vol->source_rfc1001_name[i] = toupper(nodename[i]);
Steve French2cd646a2006-09-28 19:43:08 +0000817 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700818 }
819 vol->source_rfc1001_name[15] = 0;
Steve Frencha10faeb22005-08-22 21:38:31 -0700820 /* null target name indicates to use *SMBSERVR default called name
821 if we end up sending RFC1001 session initialize */
822 vol->target_rfc1001_name[0] = 0;
Jeff Layton3e4b3e12010-07-19 18:00:17 -0400823 vol->cred_uid = current_uid();
824 vol->linux_uid = current_uid();
David Howellsa001e5b2008-11-14 10:38:47 +1100825 vol->linux_gid = current_gid();
Jeff Laytonf55ed1a2009-05-26 16:28:11 -0400826
827 /* default to only allowing write access to owner of the mount */
828 vol->dir_mode = vol->file_mode = S_IRUGO | S_IXUGO | S_IWUSR;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700829
830 /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */
Jeremy Allisonac670552005-06-22 17:26:35 -0700831 /* default is always to request posix paths. */
832 vol->posix_paths = 1;
Jeff Laytona0c92172009-05-27 15:40:47 -0400833 /* default to using server inode numbers where available */
834 vol->server_ino = 1;
Jeremy Allisonac670552005-06-22 17:26:35 -0700835
Linus Torvalds1da177e2005-04-16 15:20:36 -0700836 if (!options)
837 return 1;
838
Steve French50c2f752007-07-13 00:33:32 +0000839 if (strncmp(options, "sep=", 4) == 0) {
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000840 if (options[4] != 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700841 separator[0] = options[4];
842 options += 5;
843 } else {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000844 cFYI(1, "Null separator not allowed");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700845 }
846 }
Steve French50c2f752007-07-13 00:33:32 +0000847
Linus Torvalds1da177e2005-04-16 15:20:36 -0700848 while ((data = strsep(&options, separator)) != NULL) {
849 if (!*data)
850 continue;
851 if ((value = strchr(data, '=')) != NULL)
852 *value++ = '\0';
853
Steve French50c2f752007-07-13 00:33:32 +0000854 /* Have to parse this before we parse for "user" */
855 if (strnicmp(data, "user_xattr", 10) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700856 vol->no_xattr = 0;
Steve French50c2f752007-07-13 00:33:32 +0000857 } else if (strnicmp(data, "nouser_xattr", 12) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700858 vol->no_xattr = 1;
859 } else if (strnicmp(data, "user", 4) == 0) {
Steve French4b952a92006-10-30 21:46:13 +0000860 if (!value) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700861 printk(KERN_WARNING
862 "CIFS: invalid or missing username\n");
863 return 1; /* needs_arg; */
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000864 } else if (!*value) {
Steve French4b952a92006-10-30 21:46:13 +0000865 /* null user, ie anonymous, authentication */
866 vol->nullauth = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700867 }
868 if (strnlen(value, 200) < 200) {
869 vol->username = value;
870 } else {
871 printk(KERN_WARNING "CIFS: username too long\n");
872 return 1;
873 }
874 } else if (strnicmp(data, "pass", 4) == 0) {
875 if (!value) {
876 vol->password = NULL;
877 continue;
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000878 } else if (value[0] == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700879 /* check if string begins with double comma
880 since that would mean the password really
881 does start with a comma, and would not
882 indicate an empty string */
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000883 if (value[1] != separator[0]) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700884 vol->password = NULL;
885 continue;
886 }
887 }
888 temp_len = strlen(value);
889 /* removed password length check, NTLM passwords
890 can be arbitrarily long */
891
Steve French50c2f752007-07-13 00:33:32 +0000892 /* if comma in password, the string will be
Linus Torvalds1da177e2005-04-16 15:20:36 -0700893 prematurely null terminated. Commas in password are
894 specified across the cifs mount interface by a double
895 comma ie ,, and a comma used as in other cases ie ','
896 as a parameter delimiter/separator is single and due
897 to the strsep above is temporarily zeroed. */
898
899 /* NB: password legally can have multiple commas and
900 the only illegal character in a password is null */
901
Steve French50c2f752007-07-13 00:33:32 +0000902 if ((value[temp_len] == 0) &&
Steve French09d1db52005-04-28 22:41:08 -0700903 (value[temp_len+1] == separator[0])) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700904 /* reinsert comma */
905 value[temp_len] = separator[0];
Steve French50c2f752007-07-13 00:33:32 +0000906 temp_len += 2; /* move after second comma */
907 while (value[temp_len] != 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700908 if (value[temp_len] == separator[0]) {
Steve French50c2f752007-07-13 00:33:32 +0000909 if (value[temp_len+1] ==
Steve French09d1db52005-04-28 22:41:08 -0700910 separator[0]) {
911 /* skip second comma */
912 temp_len++;
Steve French50c2f752007-07-13 00:33:32 +0000913 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700914 /* single comma indicating start
915 of next parm */
916 break;
917 }
918 }
919 temp_len++;
920 }
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000921 if (value[temp_len] == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700922 options = NULL;
923 } else {
924 value[temp_len] = 0;
925 /* point option to start of next parm */
926 options = value + temp_len + 1;
927 }
Steve French50c2f752007-07-13 00:33:32 +0000928 /* go from value to value + temp_len condensing
Linus Torvalds1da177e2005-04-16 15:20:36 -0700929 double commas to singles. Note that this ends up
930 allocating a few bytes too many, which is ok */
Pekka Enberge915fc42005-09-06 15:18:35 -0700931 vol->password = kzalloc(temp_len, GFP_KERNEL);
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000932 if (vol->password == NULL) {
Steve French50c2f752007-07-13 00:33:32 +0000933 printk(KERN_WARNING "CIFS: no memory "
934 "for password\n");
Steve French433dc242005-04-28 22:41:08 -0700935 return 1;
936 }
Steve French50c2f752007-07-13 00:33:32 +0000937 for (i = 0, j = 0; i < temp_len; i++, j++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700938 vol->password[j] = value[i];
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000939 if (value[i] == separator[0]
Steve French09d1db52005-04-28 22:41:08 -0700940 && value[i+1] == separator[0]) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700941 /* skip second comma */
942 i++;
943 }
944 }
945 vol->password[j] = 0;
946 } else {
Pekka Enberge915fc42005-09-06 15:18:35 -0700947 vol->password = kzalloc(temp_len+1, GFP_KERNEL);
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000948 if (vol->password == NULL) {
Steve French50c2f752007-07-13 00:33:32 +0000949 printk(KERN_WARNING "CIFS: no memory "
950 "for password\n");
Steve French433dc242005-04-28 22:41:08 -0700951 return 1;
952 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700953 strcpy(vol->password, value);
954 }
Jeff Layton58f7f682009-06-10 09:57:55 -0400955 } else if (!strnicmp(data, "ip", 2) ||
956 !strnicmp(data, "addr", 4)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700957 if (!value || !*value) {
958 vol->UNCip = NULL;
Jeff Layton50b64e32009-06-02 06:55:20 -0400959 } else if (strnlen(value, INET6_ADDRSTRLEN) <
960 INET6_ADDRSTRLEN) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700961 vol->UNCip = value;
962 } else {
Steve French50c2f752007-07-13 00:33:32 +0000963 printk(KERN_WARNING "CIFS: ip address "
964 "too long\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700965 return 1;
966 }
Steve French50c2f752007-07-13 00:33:32 +0000967 } else if (strnicmp(data, "sec", 3) == 0) {
968 if (!value || !*value) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000969 cERROR(1, "no security value specified");
Steve French50c2f752007-07-13 00:33:32 +0000970 continue;
971 } else if (strnicmp(value, "krb5i", 5) == 0) {
972 vol->secFlg |= CIFSSEC_MAY_KRB5 |
Steve French189acaa2006-06-23 02:33:48 +0000973 CIFSSEC_MUST_SIGN;
Steve Frenchbf820672005-12-01 22:32:42 -0800974 } else if (strnicmp(value, "krb5p", 5) == 0) {
Steve French50c2f752007-07-13 00:33:32 +0000975 /* vol->secFlg |= CIFSSEC_MUST_SEAL |
976 CIFSSEC_MAY_KRB5; */
Joe Perchesb6b38f72010-04-21 03:50:45 +0000977 cERROR(1, "Krb5 cifs privacy not supported");
Steve Frenchbf820672005-12-01 22:32:42 -0800978 return 1;
979 } else if (strnicmp(value, "krb5", 4) == 0) {
Steve French750d1152006-06-27 06:28:30 +0000980 vol->secFlg |= CIFSSEC_MAY_KRB5;
Steve Frenchac683922009-05-06 04:16:04 +0000981#ifdef CONFIG_CIFS_EXPERIMENTAL
982 } else if (strnicmp(value, "ntlmsspi", 8) == 0) {
983 vol->secFlg |= CIFSSEC_MAY_NTLMSSP |
984 CIFSSEC_MUST_SIGN;
985 } else if (strnicmp(value, "ntlmssp", 7) == 0) {
986 vol->secFlg |= CIFSSEC_MAY_NTLMSSP;
987#endif
Steve Frenchbf820672005-12-01 22:32:42 -0800988 } else if (strnicmp(value, "ntlmv2i", 7) == 0) {
Steve French750d1152006-06-27 06:28:30 +0000989 vol->secFlg |= CIFSSEC_MAY_NTLMV2 |
Steve French189acaa2006-06-23 02:33:48 +0000990 CIFSSEC_MUST_SIGN;
Steve Frenchbf820672005-12-01 22:32:42 -0800991 } else if (strnicmp(value, "ntlmv2", 6) == 0) {
Steve French750d1152006-06-27 06:28:30 +0000992 vol->secFlg |= CIFSSEC_MAY_NTLMV2;
Steve Frenchbf820672005-12-01 22:32:42 -0800993 } else if (strnicmp(value, "ntlmi", 5) == 0) {
Steve French750d1152006-06-27 06:28:30 +0000994 vol->secFlg |= CIFSSEC_MAY_NTLM |
Steve French189acaa2006-06-23 02:33:48 +0000995 CIFSSEC_MUST_SIGN;
Steve Frenchbf820672005-12-01 22:32:42 -0800996 } else if (strnicmp(value, "ntlm", 4) == 0) {
997 /* ntlm is default so can be turned off too */
Steve French750d1152006-06-27 06:28:30 +0000998 vol->secFlg |= CIFSSEC_MAY_NTLM;
Steve Frenchbf820672005-12-01 22:32:42 -0800999 } else if (strnicmp(value, "nontlm", 6) == 0) {
Steve French189acaa2006-06-23 02:33:48 +00001000 /* BB is there a better way to do this? */
Steve French750d1152006-06-27 06:28:30 +00001001 vol->secFlg |= CIFSSEC_MAY_NTLMV2;
Steve French189acaa2006-06-23 02:33:48 +00001002#ifdef CONFIG_CIFS_WEAK_PW_HASH
1003 } else if (strnicmp(value, "lanman", 6) == 0) {
Steve French50c2f752007-07-13 00:33:32 +00001004 vol->secFlg |= CIFSSEC_MAY_LANMAN;
Steve French189acaa2006-06-23 02:33:48 +00001005#endif
Steve Frenchbf820672005-12-01 22:32:42 -08001006 } else if (strnicmp(value, "none", 4) == 0) {
Steve French189acaa2006-06-23 02:33:48 +00001007 vol->nullauth = 1;
Steve French50c2f752007-07-13 00:33:32 +00001008 } else {
Joe Perchesb6b38f72010-04-21 03:50:45 +00001009 cERROR(1, "bad security option: %s", value);
Steve French50c2f752007-07-13 00:33:32 +00001010 return 1;
1011 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001012 } else if ((strnicmp(data, "unc", 3) == 0)
1013 || (strnicmp(data, "target", 6) == 0)
1014 || (strnicmp(data, "path", 4) == 0)) {
1015 if (!value || !*value) {
Steve French50c2f752007-07-13 00:33:32 +00001016 printk(KERN_WARNING "CIFS: invalid path to "
1017 "network resource\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001018 return 1; /* needs_arg; */
1019 }
1020 if ((temp_len = strnlen(value, 300)) < 300) {
Steve French50c2f752007-07-13 00:33:32 +00001021 vol->UNC = kmalloc(temp_len+1, GFP_KERNEL);
Steve French4523cc32007-04-30 20:13:06 +00001022 if (vol->UNC == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001023 return 1;
Steve French50c2f752007-07-13 00:33:32 +00001024 strcpy(vol->UNC, value);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001025 if (strncmp(vol->UNC, "//", 2) == 0) {
1026 vol->UNC[0] = '\\';
1027 vol->UNC[1] = '\\';
Steve French50c2f752007-07-13 00:33:32 +00001028 } else if (strncmp(vol->UNC, "\\\\", 2) != 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001029 printk(KERN_WARNING
Steve French50c2f752007-07-13 00:33:32 +00001030 "CIFS: UNC Path does not begin "
1031 "with // or \\\\ \n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001032 return 1;
1033 }
1034 } else {
1035 printk(KERN_WARNING "CIFS: UNC name too long\n");
1036 return 1;
1037 }
1038 } else if ((strnicmp(data, "domain", 3) == 0)
1039 || (strnicmp(data, "workgroup", 5) == 0)) {
1040 if (!value || !*value) {
1041 printk(KERN_WARNING "CIFS: invalid domain name\n");
1042 return 1; /* needs_arg; */
1043 }
1044 /* BB are there cases in which a comma can be valid in
1045 a domain name and need special handling? */
Steve French39798772006-05-31 22:40:51 +00001046 if (strnlen(value, 256) < 256) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001047 vol->domainname = value;
Joe Perchesb6b38f72010-04-21 03:50:45 +00001048 cFYI(1, "Domain name set");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001049 } else {
Steve French50c2f752007-07-13 00:33:32 +00001050 printk(KERN_WARNING "CIFS: domain name too "
1051 "long\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001052 return 1;
1053 }
Ben Greear3eb9a882010-09-01 17:06:02 -07001054 } else if (strnicmp(data, "srcaddr", 7) == 0) {
1055 vol->srcaddr.ss_family = AF_UNSPEC;
1056
1057 if (!value || !*value) {
1058 printk(KERN_WARNING "CIFS: srcaddr value"
1059 " not specified.\n");
1060 return 1; /* needs_arg; */
1061 }
1062 i = cifs_convert_address((struct sockaddr *)&vol->srcaddr,
1063 value, strlen(value));
1064 if (i < 0) {
1065 printk(KERN_WARNING "CIFS: Could not parse"
1066 " srcaddr: %s\n",
1067 value);
1068 return 1;
1069 }
Steve French50c2f752007-07-13 00:33:32 +00001070 } else if (strnicmp(data, "prefixpath", 10) == 0) {
1071 if (!value || !*value) {
1072 printk(KERN_WARNING
1073 "CIFS: invalid path prefix\n");
1074 return 1; /* needs_argument */
1075 }
1076 if ((temp_len = strnlen(value, 1024)) < 1024) {
Steve French4523cc32007-04-30 20:13:06 +00001077 if (value[0] != '/')
Steve French2fe87f02006-09-21 07:02:52 +00001078 temp_len++; /* missing leading slash */
Steve French50c2f752007-07-13 00:33:32 +00001079 vol->prepath = kmalloc(temp_len+1, GFP_KERNEL);
1080 if (vol->prepath == NULL)
1081 return 1;
Steve French4523cc32007-04-30 20:13:06 +00001082 if (value[0] != '/') {
Steve French2fe87f02006-09-21 07:02:52 +00001083 vol->prepath[0] = '/';
Steve French50c2f752007-07-13 00:33:32 +00001084 strcpy(vol->prepath+1, value);
Steve French2fe87f02006-09-21 07:02:52 +00001085 } else
Steve French50c2f752007-07-13 00:33:32 +00001086 strcpy(vol->prepath, value);
Joe Perchesb6b38f72010-04-21 03:50:45 +00001087 cFYI(1, "prefix path %s", vol->prepath);
Steve French50c2f752007-07-13 00:33:32 +00001088 } else {
1089 printk(KERN_WARNING "CIFS: prefix too long\n");
1090 return 1;
1091 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001092 } else if (strnicmp(data, "iocharset", 9) == 0) {
1093 if (!value || !*value) {
Steve French63135e02007-07-17 17:34:02 +00001094 printk(KERN_WARNING "CIFS: invalid iocharset "
1095 "specified\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001096 return 1; /* needs_arg; */
1097 }
1098 if (strnlen(value, 65) < 65) {
Steve French50c2f752007-07-13 00:33:32 +00001099 if (strnicmp(value, "default", 7))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001100 vol->iocharset = value;
Steve French50c2f752007-07-13 00:33:32 +00001101 /* if iocharset not set then load_nls_default
1102 is used by caller */
Joe Perchesb6b38f72010-04-21 03:50:45 +00001103 cFYI(1, "iocharset set to %s", value);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001104 } else {
Steve French63135e02007-07-17 17:34:02 +00001105 printk(KERN_WARNING "CIFS: iocharset name "
1106 "too long.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001107 return 1;
1108 }
Jeff Layton9b9d6b242009-07-31 06:56:09 -04001109 } else if (!strnicmp(data, "uid", 3) && value && *value) {
1110 vol->linux_uid = simple_strtoul(value, &value, 0);
1111 uid_specified = true;
1112 } else if (!strnicmp(data, "forceuid", 8)) {
1113 override_uid = 1;
1114 } else if (!strnicmp(data, "noforceuid", 10)) {
1115 override_uid = 0;
1116 } else if (!strnicmp(data, "gid", 3) && value && *value) {
1117 vol->linux_gid = simple_strtoul(value, &value, 0);
1118 gid_specified = true;
1119 } else if (!strnicmp(data, "forcegid", 8)) {
1120 override_gid = 1;
1121 } else if (!strnicmp(data, "noforcegid", 10)) {
1122 override_gid = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001123 } else if (strnicmp(data, "file_mode", 4) == 0) {
1124 if (value && *value) {
1125 vol->file_mode =
1126 simple_strtoul(value, &value, 0);
1127 }
1128 } else if (strnicmp(data, "dir_mode", 4) == 0) {
1129 if (value && *value) {
1130 vol->dir_mode =
1131 simple_strtoul(value, &value, 0);
1132 }
1133 } else if (strnicmp(data, "dirmode", 4) == 0) {
1134 if (value && *value) {
1135 vol->dir_mode =
1136 simple_strtoul(value, &value, 0);
1137 }
1138 } else if (strnicmp(data, "port", 4) == 0) {
1139 if (value && *value) {
1140 vol->port =
1141 simple_strtoul(value, &value, 0);
1142 }
1143 } else if (strnicmp(data, "rsize", 5) == 0) {
1144 if (value && *value) {
1145 vol->rsize =
1146 simple_strtoul(value, &value, 0);
1147 }
1148 } else if (strnicmp(data, "wsize", 5) == 0) {
1149 if (value && *value) {
1150 vol->wsize =
1151 simple_strtoul(value, &value, 0);
1152 }
1153 } else if (strnicmp(data, "sockopt", 5) == 0) {
Steve French6a5fa2362010-01-01 01:28:43 +00001154 if (!value || !*value) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00001155 cERROR(1, "no socket option specified");
Steve French6a5fa2362010-01-01 01:28:43 +00001156 continue;
1157 } else if (strnicmp(value, "TCP_NODELAY", 11) == 0) {
1158 vol->sockopt_tcp_nodelay = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001159 }
1160 } else if (strnicmp(data, "netbiosname", 4) == 0) {
1161 if (!value || !*value || (*value == ' ')) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00001162 cFYI(1, "invalid (empty) netbiosname");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001163 } else {
Steve French50c2f752007-07-13 00:33:32 +00001164 memset(vol->source_rfc1001_name, 0x20, 15);
1165 for (i = 0; i < 15; i++) {
1166 /* BB are there cases in which a comma can be
Linus Torvalds1da177e2005-04-16 15:20:36 -07001167 valid in this workstation netbios name (and need
1168 special handling)? */
1169
1170 /* We do not uppercase netbiosname for user */
Steve French50c2f752007-07-13 00:33:32 +00001171 if (value[i] == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001172 break;
Steve French50c2f752007-07-13 00:33:32 +00001173 else
1174 vol->source_rfc1001_name[i] =
1175 value[i];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001176 }
1177 /* The string has 16th byte zero still from
1178 set at top of the function */
Steve French50c2f752007-07-13 00:33:32 +00001179 if ((i == 15) && (value[i] != 0))
1180 printk(KERN_WARNING "CIFS: netbiosname"
1181 " longer than 15 truncated.\n");
Steve Frencha10faeb22005-08-22 21:38:31 -07001182 }
1183 } else if (strnicmp(data, "servern", 7) == 0) {
1184 /* servernetbiosname specified override *SMBSERVER */
1185 if (!value || !*value || (*value == ' ')) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00001186 cFYI(1, "empty server netbiosname specified");
Steve Frencha10faeb22005-08-22 21:38:31 -07001187 } else {
1188 /* last byte, type, is 0x20 for servr type */
Steve French50c2f752007-07-13 00:33:32 +00001189 memset(vol->target_rfc1001_name, 0x20, 16);
Steve Frencha10faeb22005-08-22 21:38:31 -07001190
Steve French50c2f752007-07-13 00:33:32 +00001191 for (i = 0; i < 15; i++) {
Steve Frencha10faeb22005-08-22 21:38:31 -07001192 /* BB are there cases in which a comma can be
Steve French50c2f752007-07-13 00:33:32 +00001193 valid in this workstation netbios name
1194 (and need special handling)? */
Steve Frencha10faeb22005-08-22 21:38:31 -07001195
Steve French50c2f752007-07-13 00:33:32 +00001196 /* user or mount helper must uppercase
1197 the netbiosname */
1198 if (value[i] == 0)
Steve Frencha10faeb22005-08-22 21:38:31 -07001199 break;
1200 else
Steve French50c2f752007-07-13 00:33:32 +00001201 vol->target_rfc1001_name[i] =
1202 value[i];
Steve Frencha10faeb22005-08-22 21:38:31 -07001203 }
1204 /* The string has 16th byte zero still from
1205 set at top of the function */
Steve French50c2f752007-07-13 00:33:32 +00001206 if ((i == 15) && (value[i] != 0))
1207 printk(KERN_WARNING "CIFS: server net"
1208 "biosname longer than 15 truncated.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001209 }
1210 } else if (strnicmp(data, "credentials", 4) == 0) {
1211 /* ignore */
1212 } else if (strnicmp(data, "version", 3) == 0) {
1213 /* ignore */
Steve French50c2f752007-07-13 00:33:32 +00001214 } else if (strnicmp(data, "guest", 5) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001215 /* ignore */
Steve French71a394f2009-06-26 04:07:18 +00001216 } else if (strnicmp(data, "rw", 2) == 0) {
1217 /* ignore */
1218 } else if (strnicmp(data, "ro", 2) == 0) {
1219 /* ignore */
Steve Frenchedf1ae42008-10-29 00:47:57 +00001220 } else if (strnicmp(data, "noblocksend", 11) == 0) {
1221 vol->noblocksnd = 1;
1222 } else if (strnicmp(data, "noautotune", 10) == 0) {
1223 vol->noautotune = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001224 } else if ((strnicmp(data, "suid", 4) == 0) ||
1225 (strnicmp(data, "nosuid", 6) == 0) ||
1226 (strnicmp(data, "exec", 4) == 0) ||
1227 (strnicmp(data, "noexec", 6) == 0) ||
1228 (strnicmp(data, "nodev", 5) == 0) ||
1229 (strnicmp(data, "noauto", 6) == 0) ||
1230 (strnicmp(data, "dev", 3) == 0)) {
1231 /* The mount tool or mount.cifs helper (if present)
Steve French50c2f752007-07-13 00:33:32 +00001232 uses these opts to set flags, and the flags are read
1233 by the kernel vfs layer before we get here (ie
1234 before read super) so there is no point trying to
1235 parse these options again and set anything and it
1236 is ok to just ignore them */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001237 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001238 } else if (strnicmp(data, "hard", 4) == 0) {
1239 vol->retry = 1;
1240 } else if (strnicmp(data, "soft", 4) == 0) {
1241 vol->retry = 0;
1242 } else if (strnicmp(data, "perm", 4) == 0) {
1243 vol->noperm = 0;
1244 } else if (strnicmp(data, "noperm", 6) == 0) {
1245 vol->noperm = 1;
Steve French6a0b4822005-04-28 22:41:05 -07001246 } else if (strnicmp(data, "mapchars", 8) == 0) {
1247 vol->remap = 1;
1248 } else if (strnicmp(data, "nomapchars", 10) == 0) {
1249 vol->remap = 0;
Steve French50c2f752007-07-13 00:33:32 +00001250 } else if (strnicmp(data, "sfu", 3) == 0) {
1251 vol->sfu_emul = 1;
1252 } else if (strnicmp(data, "nosfu", 5) == 0) {
1253 vol->sfu_emul = 0;
Steve French2c1b8612008-10-16 18:35:21 +00001254 } else if (strnicmp(data, "nodfs", 5) == 0) {
1255 vol->nodfs = 1;
Jeremy Allisonac670552005-06-22 17:26:35 -07001256 } else if (strnicmp(data, "posixpaths", 10) == 0) {
1257 vol->posix_paths = 1;
1258 } else if (strnicmp(data, "noposixpaths", 12) == 0) {
1259 vol->posix_paths = 0;
Steve Frenchc18c8422007-07-18 23:21:09 +00001260 } else if (strnicmp(data, "nounix", 6) == 0) {
1261 vol->no_linux_ext = 1;
1262 } else if (strnicmp(data, "nolinux", 7) == 0) {
1263 vol->no_linux_ext = 1;
Steve French50c2f752007-07-13 00:33:32 +00001264 } else if ((strnicmp(data, "nocase", 6) == 0) ||
Steve Frencha10faeb22005-08-22 21:38:31 -07001265 (strnicmp(data, "ignorecase", 10) == 0)) {
Steve French50c2f752007-07-13 00:33:32 +00001266 vol->nocase = 1;
Jeff Laytonf636a342010-07-26 10:29:58 -04001267 } else if (strnicmp(data, "mand", 4) == 0) {
1268 /* ignore */
1269 } else if (strnicmp(data, "nomand", 6) == 0) {
1270 /* ignore */
1271 } else if (strnicmp(data, "_netdev", 7) == 0) {
1272 /* ignore */
Steve Frenchc46fa8a2005-08-18 20:49:57 -07001273 } else if (strnicmp(data, "brl", 3) == 0) {
1274 vol->nobrl = 0;
Steve French50c2f752007-07-13 00:33:32 +00001275 } else if ((strnicmp(data, "nobrl", 5) == 0) ||
Steve French1c955182005-08-30 20:58:07 -07001276 (strnicmp(data, "nolock", 6) == 0)) {
Steve Frenchc46fa8a2005-08-18 20:49:57 -07001277 vol->nobrl = 1;
Steve Frenchd3485d32005-08-19 11:04:29 -07001278 /* turn off mandatory locking in mode
1279 if remote locking is turned off since the
1280 local vfs will do advisory */
Steve French50c2f752007-07-13 00:33:32 +00001281 if (vol->file_mode ==
1282 (S_IALLUGO & ~(S_ISUID | S_IXGRP)))
Steve Frenchd3485d32005-08-19 11:04:29 -07001283 vol->file_mode = S_IALLUGO;
Steve French13a6e422008-12-02 17:24:33 +00001284 } else if (strnicmp(data, "forcemandatorylock", 9) == 0) {
1285 /* will take the shorter form "forcemand" as well */
1286 /* This mount option will force use of mandatory
1287 (DOS/Windows style) byte range locks, instead of
1288 using posix advisory byte range locks, even if the
1289 Unix extensions are available and posix locks would
1290 be supported otherwise. If Unix extensions are not
1291 negotiated this has no effect since mandatory locks
1292 would be used (mandatory locks is all that those
1293 those servers support) */
1294 vol->mand_lock = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001295 } else if (strnicmp(data, "setuids", 7) == 0) {
1296 vol->setuids = 1;
1297 } else if (strnicmp(data, "nosetuids", 9) == 0) {
1298 vol->setuids = 0;
Jeff Laytond0a9c072008-05-12 22:23:49 +00001299 } else if (strnicmp(data, "dynperm", 7) == 0) {
1300 vol->dynperm = true;
1301 } else if (strnicmp(data, "nodynperm", 9) == 0) {
1302 vol->dynperm = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001303 } else if (strnicmp(data, "nohard", 6) == 0) {
1304 vol->retry = 0;
1305 } else if (strnicmp(data, "nosoft", 6) == 0) {
1306 vol->retry = 1;
1307 } else if (strnicmp(data, "nointr", 6) == 0) {
1308 vol->intr = 0;
1309 } else if (strnicmp(data, "intr", 4) == 0) {
1310 vol->intr = 1;
Steve Frenchbe652442009-02-23 15:21:59 +00001311 } else if (strnicmp(data, "nostrictsync", 12) == 0) {
1312 vol->nostrictsync = 1;
1313 } else if (strnicmp(data, "strictsync", 10) == 0) {
1314 vol->nostrictsync = 0;
Steve French50c2f752007-07-13 00:33:32 +00001315 } else if (strnicmp(data, "serverino", 7) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001316 vol->server_ino = 1;
Steve French50c2f752007-07-13 00:33:32 +00001317 } else if (strnicmp(data, "noserverino", 9) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001318 vol->server_ino = 0;
Steve French50c2f752007-07-13 00:33:32 +00001319 } else if (strnicmp(data, "cifsacl", 7) == 0) {
Steve French0a4b92c2006-01-12 15:44:21 -08001320 vol->cifs_acl = 1;
1321 } else if (strnicmp(data, "nocifsacl", 9) == 0) {
1322 vol->cifs_acl = 0;
Steve French50c2f752007-07-13 00:33:32 +00001323 } else if (strnicmp(data, "acl", 3) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001324 vol->no_psx_acl = 0;
Steve French50c2f752007-07-13 00:33:32 +00001325 } else if (strnicmp(data, "noacl", 5) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001326 vol->no_psx_acl = 1;
Steve French84210e92008-10-23 04:42:37 +00001327#ifdef CONFIG_CIFS_EXPERIMENTAL
1328 } else if (strnicmp(data, "locallease", 6) == 0) {
1329 vol->local_lease = 1;
1330#endif
Steve French50c2f752007-07-13 00:33:32 +00001331 } else if (strnicmp(data, "sign", 4) == 0) {
Steve French750d1152006-06-27 06:28:30 +00001332 vol->secFlg |= CIFSSEC_MUST_SIGN;
Steve French95b1cb92008-05-15 16:44:38 +00001333 } else if (strnicmp(data, "seal", 4) == 0) {
1334 /* we do not do the following in secFlags because seal
1335 is a per tree connection (mount) not a per socket
1336 or per-smb connection option in the protocol */
1337 /* vol->secFlg |= CIFSSEC_MUST_SEAL; */
1338 vol->seal = 1;
Steve French50c2f752007-07-13 00:33:32 +00001339 } else if (strnicmp(data, "direct", 6) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001340 vol->direct_io = 1;
Steve French50c2f752007-07-13 00:33:32 +00001341 } else if (strnicmp(data, "forcedirectio", 13) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001342 vol->direct_io = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001343 } else if (strnicmp(data, "noac", 4) == 0) {
Steve French50c2f752007-07-13 00:33:32 +00001344 printk(KERN_WARNING "CIFS: Mount option noac not "
1345 "supported. Instead set "
1346 "/proc/fs/cifs/LookupCacheEnabled to 0\n");
Suresh Jayaramanfa1df752010-07-05 18:13:36 +05301347 } else if (strnicmp(data, "fsc", 3) == 0) {
1348 vol->fsc = true;
Stefan Metzmacher736a33202010-07-30 14:56:00 +02001349 } else if (strnicmp(data, "mfsymlinks", 10) == 0) {
1350 vol->mfsymlinks = true;
Jeff Layton0eb8a132010-10-06 19:51:12 -04001351 } else if (strnicmp(data, "multiuser", 8) == 0) {
1352 vol->multiuser = true;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001353 } else
Steve French50c2f752007-07-13 00:33:32 +00001354 printk(KERN_WARNING "CIFS: Unknown mount option %s\n",
1355 data);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001356 }
1357 if (vol->UNC == NULL) {
Steve French4523cc32007-04-30 20:13:06 +00001358 if (devname == NULL) {
Steve French50c2f752007-07-13 00:33:32 +00001359 printk(KERN_WARNING "CIFS: Missing UNC name for mount "
1360 "target\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001361 return 1;
1362 }
1363 if ((temp_len = strnlen(devname, 300)) < 300) {
Steve French50c2f752007-07-13 00:33:32 +00001364 vol->UNC = kmalloc(temp_len+1, GFP_KERNEL);
Steve French4523cc32007-04-30 20:13:06 +00001365 if (vol->UNC == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001366 return 1;
Steve French50c2f752007-07-13 00:33:32 +00001367 strcpy(vol->UNC, devname);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001368 if (strncmp(vol->UNC, "//", 2) == 0) {
1369 vol->UNC[0] = '\\';
1370 vol->UNC[1] = '\\';
1371 } else if (strncmp(vol->UNC, "\\\\", 2) != 0) {
Steve French50c2f752007-07-13 00:33:32 +00001372 printk(KERN_WARNING "CIFS: UNC Path does not "
1373 "begin with // or \\\\ \n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001374 return 1;
1375 }
Igor Mammedov7c5e6282008-05-08 20:48:42 +00001376 value = strpbrk(vol->UNC+2, "/\\");
1377 if (value)
1378 *value = '\\';
Linus Torvalds1da177e2005-04-16 15:20:36 -07001379 } else {
1380 printk(KERN_WARNING "CIFS: UNC name too long\n");
1381 return 1;
1382 }
1383 }
Jeff Layton0eb8a132010-10-06 19:51:12 -04001384
1385 if (vol->multiuser && !(vol->secFlg & CIFSSEC_MAY_KRB5)) {
1386 cERROR(1, "Multiuser mounts currently require krb5 "
1387 "authentication!");
1388 return 1;
1389 }
1390
Steve Frenchfb8c4b12007-07-10 01:16:18 +00001391 if (vol->UNCip == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001392 vol->UNCip = &vol->UNC[2];
1393
Jeff Layton9b9d6b242009-07-31 06:56:09 -04001394 if (uid_specified)
1395 vol->override_uid = override_uid;
1396 else if (override_uid == 1)
1397 printk(KERN_NOTICE "CIFS: ignoring forceuid mount option "
1398 "specified with no uid= option.\n");
1399
1400 if (gid_specified)
1401 vol->override_gid = override_gid;
1402 else if (override_gid == 1)
1403 printk(KERN_NOTICE "CIFS: ignoring forcegid mount option "
1404 "specified with no gid= option.\n");
1405
Linus Torvalds1da177e2005-04-16 15:20:36 -07001406 return 0;
1407}
1408
Ben Greear3eb9a882010-09-01 17:06:02 -07001409/** Returns true if srcaddr isn't specified and rhs isn't
1410 * specified, or if srcaddr is specified and
1411 * matches the IP address of the rhs argument.
1412 */
Jeff Layton45151482010-07-06 20:43:02 -04001413static bool
Ben Greear3eb9a882010-09-01 17:06:02 -07001414srcip_matches(struct sockaddr *srcaddr, struct sockaddr *rhs)
1415{
1416 switch (srcaddr->sa_family) {
1417 case AF_UNSPEC:
1418 return (rhs->sa_family == AF_UNSPEC);
1419 case AF_INET: {
1420 struct sockaddr_in *saddr4 = (struct sockaddr_in *)srcaddr;
1421 struct sockaddr_in *vaddr4 = (struct sockaddr_in *)rhs;
1422 return (saddr4->sin_addr.s_addr == vaddr4->sin_addr.s_addr);
1423 }
1424 case AF_INET6: {
1425 struct sockaddr_in6 *saddr6 = (struct sockaddr_in6 *)srcaddr;
1426 struct sockaddr_in6 *vaddr6 = (struct sockaddr_in6 *)&rhs;
1427 return ipv6_addr_equal(&saddr6->sin6_addr, &vaddr6->sin6_addr);
1428 }
1429 default:
1430 WARN_ON(1);
1431 return false; /* don't expect to be here */
1432 }
1433}
1434
1435
1436static bool
1437match_address(struct TCP_Server_Info *server, struct sockaddr *addr,
1438 struct sockaddr *srcaddr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001439{
Jeff Layton45151482010-07-06 20:43:02 -04001440 struct sockaddr_in *addr4 = (struct sockaddr_in *)addr;
1441 struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr;
1442
1443 switch (addr->sa_family) {
1444 case AF_INET:
1445 if (addr4->sin_addr.s_addr !=
1446 server->addr.sockAddr.sin_addr.s_addr)
1447 return false;
1448 if (addr4->sin_port &&
1449 addr4->sin_port != server->addr.sockAddr.sin_port)
1450 return false;
1451 break;
1452 case AF_INET6:
1453 if (!ipv6_addr_equal(&addr6->sin6_addr,
1454 &server->addr.sockAddr6.sin6_addr))
1455 return false;
1456 if (addr6->sin6_scope_id !=
1457 server->addr.sockAddr6.sin6_scope_id)
1458 return false;
1459 if (addr6->sin6_port &&
1460 addr6->sin6_port != server->addr.sockAddr6.sin6_port)
1461 return false;
1462 break;
1463 }
1464
Ben Greear3eb9a882010-09-01 17:06:02 -07001465 if (!srcip_matches(srcaddr, (struct sockaddr *)&server->srcaddr))
1466 return false;
1467
Jeff Layton45151482010-07-06 20:43:02 -04001468 return true;
1469}
1470
Jeff Laytondaf5b0b2010-07-06 20:43:02 -04001471static bool
1472match_security(struct TCP_Server_Info *server, struct smb_vol *vol)
1473{
1474 unsigned int secFlags;
1475
1476 if (vol->secFlg & (~(CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL)))
1477 secFlags = vol->secFlg;
1478 else
1479 secFlags = global_secflags | vol->secFlg;
1480
1481 switch (server->secType) {
1482 case LANMAN:
1483 if (!(secFlags & (CIFSSEC_MAY_LANMAN|CIFSSEC_MAY_PLNTXT)))
1484 return false;
1485 break;
1486 case NTLMv2:
1487 if (!(secFlags & CIFSSEC_MAY_NTLMV2))
1488 return false;
1489 break;
1490 case NTLM:
1491 if (!(secFlags & CIFSSEC_MAY_NTLM))
1492 return false;
1493 break;
1494 case Kerberos:
1495 if (!(secFlags & CIFSSEC_MAY_KRB5))
1496 return false;
1497 break;
1498 case RawNTLMSSP:
1499 if (!(secFlags & CIFSSEC_MAY_NTLMSSP))
1500 return false;
1501 break;
1502 default:
1503 /* shouldn't happen */
1504 return false;
1505 }
1506
1507 /* now check if signing mode is acceptible */
1508 if ((secFlags & CIFSSEC_MAY_SIGN) == 0 &&
1509 (server->secMode & SECMODE_SIGN_REQUIRED))
1510 return false;
1511 else if (((secFlags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN) &&
1512 (server->secMode &
1513 (SECMODE_SIGN_ENABLED|SECMODE_SIGN_REQUIRED)) == 0)
1514 return false;
1515
1516 return true;
1517}
1518
Jeff Layton45151482010-07-06 20:43:02 -04001519static struct TCP_Server_Info *
Jeff Laytondaf5b0b2010-07-06 20:43:02 -04001520cifs_find_tcp_session(struct sockaddr *addr, struct smb_vol *vol)
Jeff Layton45151482010-07-06 20:43:02 -04001521{
Jeff Laytone7ddee92008-11-14 13:44:38 -05001522 struct TCP_Server_Info *server;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001523
Jeff Laytone7ddee92008-11-14 13:44:38 -05001524 write_lock(&cifs_tcp_ses_lock);
Jeff Layton45151482010-07-06 20:43:02 -04001525 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
Ben Greear3eb9a882010-09-01 17:06:02 -07001526 if (!match_address(server, addr,
1527 (struct sockaddr *)&vol->srcaddr))
Jeff Layton45151482010-07-06 20:43:02 -04001528 continue;
Steve French50c2f752007-07-13 00:33:32 +00001529
Jeff Laytondaf5b0b2010-07-06 20:43:02 -04001530 if (!match_security(server, vol))
1531 continue;
1532
Jeff Laytone7ddee92008-11-14 13:44:38 -05001533 ++server->srv_count;
1534 write_unlock(&cifs_tcp_ses_lock);
Joe Perchesb6b38f72010-04-21 03:50:45 +00001535 cFYI(1, "Existing tcp session with server found");
Jeff Laytone7ddee92008-11-14 13:44:38 -05001536 return server;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001537 }
Jeff Laytone7ddee92008-11-14 13:44:38 -05001538 write_unlock(&cifs_tcp_ses_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001539 return NULL;
1540}
1541
Jeff Layton14fbf502008-11-14 13:53:46 -05001542static void
Jeff Laytone7ddee92008-11-14 13:44:38 -05001543cifs_put_tcp_session(struct TCP_Server_Info *server)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001544{
Jeff Laytone7ddee92008-11-14 13:44:38 -05001545 struct task_struct *task;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001546
Jeff Laytone7ddee92008-11-14 13:44:38 -05001547 write_lock(&cifs_tcp_ses_lock);
1548 if (--server->srv_count > 0) {
1549 write_unlock(&cifs_tcp_ses_lock);
1550 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001551 }
Steve Frenchdea570e02008-05-06 22:05:51 +00001552
Jeff Laytone7ddee92008-11-14 13:44:38 -05001553 list_del_init(&server->tcp_ses_list);
1554 write_unlock(&cifs_tcp_ses_lock);
1555
1556 spin_lock(&GlobalMid_Lock);
1557 server->tcpStatus = CifsExiting;
1558 spin_unlock(&GlobalMid_Lock);
1559
Suresh Jayaraman488f1d2d2010-07-05 18:12:15 +05301560 cifs_fscache_release_client_cookie(server);
1561
Jeff Laytone7ddee92008-11-14 13:44:38 -05001562 task = xchg(&server->tsk, NULL);
1563 if (task)
1564 force_sig(SIGKILL, task);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001565}
1566
Jeff Layton63c038c2008-12-01 18:41:46 -05001567static struct TCP_Server_Info *
1568cifs_get_tcp_session(struct smb_vol *volume_info)
1569{
1570 struct TCP_Server_Info *tcp_ses = NULL;
Jeff Laytona9ac49d2009-01-22 14:43:21 -05001571 struct sockaddr_storage addr;
Jeff Layton63c038c2008-12-01 18:41:46 -05001572 struct sockaddr_in *sin_server = (struct sockaddr_in *) &addr;
1573 struct sockaddr_in6 *sin_server6 = (struct sockaddr_in6 *) &addr;
1574 int rc;
1575
Jeff Laytona9ac49d2009-01-22 14:43:21 -05001576 memset(&addr, 0, sizeof(struct sockaddr_storage));
Jeff Layton63c038c2008-12-01 18:41:46 -05001577
Joe Perchesb6b38f72010-04-21 03:50:45 +00001578 cFYI(1, "UNC: %s ip: %s", volume_info->UNC, volume_info->UNCip);
Jeff Layton1e68b2b2009-06-11 10:27:30 -04001579
Jeff Layton63c038c2008-12-01 18:41:46 -05001580 if (volume_info->UNCip && volume_info->UNC) {
Jeff Layton50d97162010-07-06 20:43:01 -04001581 rc = cifs_fill_sockaddr((struct sockaddr *)&addr,
1582 volume_info->UNCip,
David Howells67b76262010-07-22 18:33:01 +01001583 strlen(volume_info->UNCip),
Jeff Layton50d97162010-07-06 20:43:01 -04001584 volume_info->port);
Jeff Layton1e68b2b2009-06-11 10:27:30 -04001585 if (!rc) {
Jeff Layton63c038c2008-12-01 18:41:46 -05001586 /* we failed translating address */
1587 rc = -EINVAL;
1588 goto out_err;
1589 }
Jeff Layton63c038c2008-12-01 18:41:46 -05001590 } else if (volume_info->UNCip) {
1591 /* BB using ip addr as tcp_ses name to connect to the
1592 DFS root below */
Joe Perchesb6b38f72010-04-21 03:50:45 +00001593 cERROR(1, "Connecting to DFS root not implemented yet");
Jeff Layton63c038c2008-12-01 18:41:46 -05001594 rc = -EINVAL;
1595 goto out_err;
1596 } else /* which tcp_sess DFS root would we conect to */ {
Joe Perchesb6b38f72010-04-21 03:50:45 +00001597 cERROR(1, "CIFS mount error: No UNC path (e.g. -o "
1598 "unc=//192.168.1.100/public) specified");
Jeff Layton63c038c2008-12-01 18:41:46 -05001599 rc = -EINVAL;
1600 goto out_err;
1601 }
1602
1603 /* see if we already have a matching tcp_ses */
Jeff Laytondaf5b0b2010-07-06 20:43:02 -04001604 tcp_ses = cifs_find_tcp_session((struct sockaddr *)&addr, volume_info);
Jeff Layton63c038c2008-12-01 18:41:46 -05001605 if (tcp_ses)
1606 return tcp_ses;
1607
1608 tcp_ses = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL);
1609 if (!tcp_ses) {
1610 rc = -ENOMEM;
1611 goto out_err;
1612 }
1613
1614 tcp_ses->hostname = extract_hostname(volume_info->UNC);
1615 if (IS_ERR(tcp_ses->hostname)) {
1616 rc = PTR_ERR(tcp_ses->hostname);
1617 goto out_err;
1618 }
1619
1620 tcp_ses->noblocksnd = volume_info->noblocksnd;
1621 tcp_ses->noautotune = volume_info->noautotune;
Steve French6a5fa2362010-01-01 01:28:43 +00001622 tcp_ses->tcp_nodelay = volume_info->sockopt_tcp_nodelay;
Jeff Layton63c038c2008-12-01 18:41:46 -05001623 atomic_set(&tcp_ses->inFlight, 0);
1624 init_waitqueue_head(&tcp_ses->response_q);
1625 init_waitqueue_head(&tcp_ses->request_q);
1626 INIT_LIST_HEAD(&tcp_ses->pending_mid_q);
1627 mutex_init(&tcp_ses->srv_mutex);
1628 memcpy(tcp_ses->workstation_RFC1001_name,
1629 volume_info->source_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL);
1630 memcpy(tcp_ses->server_RFC1001_name,
1631 volume_info->target_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL);
1632 tcp_ses->sequence_number = 0;
1633 INIT_LIST_HEAD(&tcp_ses->tcp_ses_list);
1634 INIT_LIST_HEAD(&tcp_ses->smb_ses_list);
1635
1636 /*
1637 * at this point we are the only ones with the pointer
1638 * to the struct since the kernel thread not created yet
1639 * no need to spinlock this init of tcpStatus or srv_count
1640 */
1641 tcp_ses->tcpStatus = CifsNew;
Ben Greear3eb9a882010-09-01 17:06:02 -07001642 memcpy(&tcp_ses->srcaddr, &volume_info->srcaddr,
1643 sizeof(tcp_ses->srcaddr));
Jeff Layton63c038c2008-12-01 18:41:46 -05001644 ++tcp_ses->srv_count;
1645
Jeff Laytona9ac49d2009-01-22 14:43:21 -05001646 if (addr.ss_family == AF_INET6) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00001647 cFYI(1, "attempting ipv6 connect");
Jeff Layton63c038c2008-12-01 18:41:46 -05001648 /* BB should we allow ipv6 on port 139? */
1649 /* other OS never observed in Wild doing 139 with v6 */
1650 memcpy(&tcp_ses->addr.sockAddr6, sin_server6,
1651 sizeof(struct sockaddr_in6));
Jeff Laytond5c56052008-12-01 18:42:33 -05001652 rc = ipv6_connect(tcp_ses);
Jeff Layton63c038c2008-12-01 18:41:46 -05001653 } else {
1654 memcpy(&tcp_ses->addr.sockAddr, sin_server,
1655 sizeof(struct sockaddr_in));
Jeff Laytonbcf4b102008-12-01 18:42:15 -05001656 rc = ipv4_connect(tcp_ses);
Jeff Layton63c038c2008-12-01 18:41:46 -05001657 }
1658 if (rc < 0) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00001659 cERROR(1, "Error connecting to socket. Aborting operation");
Jeff Layton63c038c2008-12-01 18:41:46 -05001660 goto out_err;
1661 }
1662
1663 /*
1664 * since we're in a cifs function already, we know that
1665 * this will succeed. No need for try_module_get().
1666 */
1667 __module_get(THIS_MODULE);
1668 tcp_ses->tsk = kthread_run((void *)(void *)cifs_demultiplex_thread,
1669 tcp_ses, "cifsd");
1670 if (IS_ERR(tcp_ses->tsk)) {
1671 rc = PTR_ERR(tcp_ses->tsk);
Joe Perchesb6b38f72010-04-21 03:50:45 +00001672 cERROR(1, "error %d create cifsd thread", rc);
Jeff Layton63c038c2008-12-01 18:41:46 -05001673 module_put(THIS_MODULE);
1674 goto out_err;
1675 }
1676
1677 /* thread spawned, put it on the list */
1678 write_lock(&cifs_tcp_ses_lock);
1679 list_add(&tcp_ses->tcp_ses_list, &cifs_tcp_ses_list);
1680 write_unlock(&cifs_tcp_ses_lock);
1681
Suresh Jayaraman488f1d2d2010-07-05 18:12:15 +05301682 cifs_fscache_get_client_cookie(tcp_ses);
1683
Jeff Layton63c038c2008-12-01 18:41:46 -05001684 return tcp_ses;
1685
1686out_err:
1687 if (tcp_ses) {
Steve French8347a5c2009-10-06 18:31:29 +00001688 if (!IS_ERR(tcp_ses->hostname))
1689 kfree(tcp_ses->hostname);
Jeff Layton63c038c2008-12-01 18:41:46 -05001690 if (tcp_ses->ssocket)
1691 sock_release(tcp_ses->ssocket);
1692 kfree(tcp_ses);
1693 }
1694 return ERR_PTR(rc);
1695}
1696
Linus Torvalds1da177e2005-04-16 15:20:36 -07001697static struct cifsSesInfo *
Jeff Layton4ff67b72010-07-06 20:43:02 -04001698cifs_find_smb_ses(struct TCP_Server_Info *server, struct smb_vol *vol)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001699{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001700 struct cifsSesInfo *ses;
1701
Jeff Layton14fbf502008-11-14 13:53:46 -05001702 write_lock(&cifs_tcp_ses_lock);
Jeff Layton4ff67b72010-07-06 20:43:02 -04001703 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
1704 switch (server->secType) {
1705 case Kerberos:
Jeff Layton3e4b3e12010-07-19 18:00:17 -04001706 if (vol->cred_uid != ses->cred_uid)
Jeff Layton4ff67b72010-07-06 20:43:02 -04001707 continue;
1708 break;
1709 default:
1710 /* anything else takes username/password */
1711 if (strncmp(ses->userName, vol->username,
1712 MAX_USERNAME_SIZE))
1713 continue;
1714 if (strlen(vol->username) != 0 &&
Jeff Layton24e6cf92010-08-23 11:38:04 -04001715 ses->password != NULL &&
Jeff Laytonfc87a402010-08-18 13:13:39 -04001716 strncmp(ses->password,
1717 vol->password ? vol->password : "",
Jeff Layton4ff67b72010-07-06 20:43:02 -04001718 MAX_PASSWORD_SIZE))
1719 continue;
1720 }
Jeff Layton14fbf502008-11-14 13:53:46 -05001721 ++ses->ses_count;
1722 write_unlock(&cifs_tcp_ses_lock);
1723 return ses;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001724 }
Jeff Layton14fbf502008-11-14 13:53:46 -05001725 write_unlock(&cifs_tcp_ses_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001726 return NULL;
1727}
1728
Jeff Layton14fbf502008-11-14 13:53:46 -05001729static void
1730cifs_put_smb_ses(struct cifsSesInfo *ses)
1731{
1732 int xid;
1733 struct TCP_Server_Info *server = ses->server;
1734
Jeff Layton36988c72010-04-24 07:57:43 -04001735 cFYI(1, "%s: ses_count=%d\n", __func__, ses->ses_count);
Jeff Layton14fbf502008-11-14 13:53:46 -05001736 write_lock(&cifs_tcp_ses_lock);
1737 if (--ses->ses_count > 0) {
1738 write_unlock(&cifs_tcp_ses_lock);
1739 return;
1740 }
1741
1742 list_del_init(&ses->smb_ses_list);
1743 write_unlock(&cifs_tcp_ses_lock);
1744
1745 if (ses->status == CifsGood) {
1746 xid = GetXid();
1747 CIFSSMBLogoff(xid, ses);
1748 _FreeXid(xid);
1749 }
1750 sesInfoFree(ses);
1751 cifs_put_tcp_session(server);
1752}
1753
Jeff Layton36988c72010-04-24 07:57:43 -04001754static struct cifsSesInfo *
1755cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info)
1756{
1757 int rc = -ENOMEM, xid;
1758 struct cifsSesInfo *ses;
1759
1760 xid = GetXid();
1761
Jeff Layton4ff67b72010-07-06 20:43:02 -04001762 ses = cifs_find_smb_ses(server, volume_info);
Jeff Layton36988c72010-04-24 07:57:43 -04001763 if (ses) {
1764 cFYI(1, "Existing smb sess found (status=%d)", ses->status);
1765
Jeff Layton36988c72010-04-24 07:57:43 -04001766 mutex_lock(&ses->session_mutex);
Jeff Layton198b5682010-04-24 07:57:48 -04001767 rc = cifs_negotiate_protocol(xid, ses);
1768 if (rc) {
1769 mutex_unlock(&ses->session_mutex);
1770 /* problem -- put our ses reference */
1771 cifs_put_smb_ses(ses);
1772 FreeXid(xid);
1773 return ERR_PTR(rc);
1774 }
Jeff Layton36988c72010-04-24 07:57:43 -04001775 if (ses->need_reconnect) {
1776 cFYI(1, "Session needs reconnect");
1777 rc = cifs_setup_session(xid, ses,
1778 volume_info->local_nls);
1779 if (rc) {
1780 mutex_unlock(&ses->session_mutex);
1781 /* problem -- put our reference */
1782 cifs_put_smb_ses(ses);
1783 FreeXid(xid);
1784 return ERR_PTR(rc);
1785 }
1786 }
1787 mutex_unlock(&ses->session_mutex);
Jeff Layton460cf342010-09-14 11:38:24 -04001788
1789 /* existing SMB ses has a server reference already */
1790 cifs_put_tcp_session(server);
Jeff Layton36988c72010-04-24 07:57:43 -04001791 FreeXid(xid);
1792 return ses;
1793 }
1794
1795 cFYI(1, "Existing smb sess not found");
1796 ses = sesInfoAlloc();
1797 if (ses == NULL)
1798 goto get_ses_fail;
1799
Shirish Pargaonkar2b149f12010-09-18 22:02:18 -05001800 ses->tilen = 0;
1801 ses->tiblob = NULL;
Jeff Layton36988c72010-04-24 07:57:43 -04001802 /* new SMB session uses our server ref */
1803 ses->server = server;
1804 if (server->addr.sockAddr6.sin6_family == AF_INET6)
1805 sprintf(ses->serverName, "%pI6",
1806 &server->addr.sockAddr6.sin6_addr);
1807 else
1808 sprintf(ses->serverName, "%pI4",
1809 &server->addr.sockAddr.sin_addr.s_addr);
1810
1811 if (volume_info->username)
1812 strncpy(ses->userName, volume_info->username,
1813 MAX_USERNAME_SIZE);
1814
1815 /* volume_info->password freed at unmount */
1816 if (volume_info->password) {
1817 ses->password = kstrdup(volume_info->password, GFP_KERNEL);
1818 if (!ses->password)
1819 goto get_ses_fail;
1820 }
1821 if (volume_info->domainname) {
1822 int len = strlen(volume_info->domainname);
1823 ses->domainName = kmalloc(len + 1, GFP_KERNEL);
1824 if (ses->domainName)
1825 strcpy(ses->domainName, volume_info->domainname);
1826 }
Jeff Layton3e4b3e12010-07-19 18:00:17 -04001827 ses->cred_uid = volume_info->cred_uid;
Jeff Layton36988c72010-04-24 07:57:43 -04001828 ses->linux_uid = volume_info->linux_uid;
1829 ses->overrideSecFlg = volume_info->secFlg;
1830
1831 mutex_lock(&ses->session_mutex);
Jeff Layton198b5682010-04-24 07:57:48 -04001832 rc = cifs_negotiate_protocol(xid, ses);
1833 if (!rc)
1834 rc = cifs_setup_session(xid, ses, volume_info->local_nls);
Jeff Layton36988c72010-04-24 07:57:43 -04001835 mutex_unlock(&ses->session_mutex);
Steve Frenchc8e56f12010-09-08 21:10:58 +00001836 if (rc)
Jeff Layton36988c72010-04-24 07:57:43 -04001837 goto get_ses_fail;
1838
1839 /* success, put it on the list */
1840 write_lock(&cifs_tcp_ses_lock);
1841 list_add(&ses->smb_ses_list, &server->smb_ses_list);
1842 write_unlock(&cifs_tcp_ses_lock);
1843
1844 FreeXid(xid);
1845 return ses;
1846
1847get_ses_fail:
1848 sesInfoFree(ses);
1849 FreeXid(xid);
1850 return ERR_PTR(rc);
1851}
1852
Linus Torvalds1da177e2005-04-16 15:20:36 -07001853static struct cifsTconInfo *
Jeff Laytonf1987b42008-11-15 11:12:47 -05001854cifs_find_tcon(struct cifsSesInfo *ses, const char *unc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001855{
1856 struct list_head *tmp;
1857 struct cifsTconInfo *tcon;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001858
Jeff Laytonf1987b42008-11-15 11:12:47 -05001859 write_lock(&cifs_tcp_ses_lock);
1860 list_for_each(tmp, &ses->tcon_list) {
1861 tcon = list_entry(tmp, struct cifsTconInfo, tcon_list);
1862 if (tcon->tidStatus == CifsExiting)
1863 continue;
1864 if (strncmp(tcon->treeName, unc, MAX_TREE_SIZE))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001865 continue;
1866
Jeff Laytonf1987b42008-11-15 11:12:47 -05001867 ++tcon->tc_count;
1868 write_unlock(&cifs_tcp_ses_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001869 return tcon;
1870 }
Jeff Laytonf1987b42008-11-15 11:12:47 -05001871 write_unlock(&cifs_tcp_ses_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001872 return NULL;
1873}
1874
Jeff Laytonf1987b42008-11-15 11:12:47 -05001875static void
1876cifs_put_tcon(struct cifsTconInfo *tcon)
1877{
1878 int xid;
1879 struct cifsSesInfo *ses = tcon->ses;
1880
Jeff Laytond00c28d2010-04-24 07:57:44 -04001881 cFYI(1, "%s: tc_count=%d\n", __func__, tcon->tc_count);
Jeff Laytonf1987b42008-11-15 11:12:47 -05001882 write_lock(&cifs_tcp_ses_lock);
1883 if (--tcon->tc_count > 0) {
1884 write_unlock(&cifs_tcp_ses_lock);
1885 return;
1886 }
1887
1888 list_del_init(&tcon->tcon_list);
1889 write_unlock(&cifs_tcp_ses_lock);
1890
1891 xid = GetXid();
1892 CIFSSMBTDis(xid, tcon);
1893 _FreeXid(xid);
1894
Suresh Jayaramand03382c2010-07-05 18:12:27 +05301895 cifs_fscache_release_super_cookie(tcon);
Steve French9f841592010-07-23 20:37:53 +00001896 tconInfoFree(tcon);
Jeff Laytonf1987b42008-11-15 11:12:47 -05001897 cifs_put_smb_ses(ses);
1898}
1899
Jeff Laytond00c28d2010-04-24 07:57:44 -04001900static struct cifsTconInfo *
1901cifs_get_tcon(struct cifsSesInfo *ses, struct smb_vol *volume_info)
1902{
1903 int rc, xid;
1904 struct cifsTconInfo *tcon;
1905
1906 tcon = cifs_find_tcon(ses, volume_info->UNC);
1907 if (tcon) {
1908 cFYI(1, "Found match on UNC path");
1909 /* existing tcon already has a reference */
1910 cifs_put_smb_ses(ses);
1911 if (tcon->seal != volume_info->seal)
1912 cERROR(1, "transport encryption setting "
1913 "conflicts with existing tid");
1914 return tcon;
1915 }
1916
1917 tcon = tconInfoAlloc();
1918 if (tcon == NULL) {
1919 rc = -ENOMEM;
1920 goto out_fail;
1921 }
1922
1923 tcon->ses = ses;
1924 if (volume_info->password) {
1925 tcon->password = kstrdup(volume_info->password, GFP_KERNEL);
1926 if (!tcon->password) {
1927 rc = -ENOMEM;
1928 goto out_fail;
1929 }
1930 }
1931
1932 if (strchr(volume_info->UNC + 3, '\\') == NULL
1933 && strchr(volume_info->UNC + 3, '/') == NULL) {
1934 cERROR(1, "Missing share name");
1935 rc = -ENODEV;
1936 goto out_fail;
1937 }
1938
1939 /* BB Do we need to wrap session_mutex around
1940 * this TCon call and Unix SetFS as
1941 * we do on SessSetup and reconnect? */
1942 xid = GetXid();
1943 rc = CIFSTCon(xid, ses, volume_info->UNC, tcon, volume_info->local_nls);
1944 FreeXid(xid);
1945 cFYI(1, "CIFS Tcon rc = %d", rc);
1946 if (rc)
1947 goto out_fail;
1948
1949 if (volume_info->nodfs) {
1950 tcon->Flags &= ~SMB_SHARE_IS_IN_DFS;
1951 cFYI(1, "DFS disabled (%d)", tcon->Flags);
1952 }
1953 tcon->seal = volume_info->seal;
1954 /* we can have only one retry value for a connection
1955 to a share so for resources mounted more than once
1956 to the same server share the last value passed in
1957 for the retry flag is used */
1958 tcon->retry = volume_info->retry;
1959 tcon->nocase = volume_info->nocase;
1960 tcon->local_lease = volume_info->local_lease;
1961
1962 write_lock(&cifs_tcp_ses_lock);
1963 list_add(&tcon->tcon_list, &ses->tcon_list);
1964 write_unlock(&cifs_tcp_ses_lock);
1965
Suresh Jayaramand03382c2010-07-05 18:12:27 +05301966 cifs_fscache_get_super_cookie(tcon);
1967
Jeff Laytond00c28d2010-04-24 07:57:44 -04001968 return tcon;
1969
1970out_fail:
1971 tconInfoFree(tcon);
1972 return ERR_PTR(rc);
1973}
1974
Jeff Layton9d002df2010-10-06 19:51:11 -04001975void
1976cifs_put_tlink(struct tcon_link *tlink)
1977{
1978 if (!tlink || IS_ERR(tlink))
1979 return;
1980
1981 if (!atomic_dec_and_test(&tlink->tl_count) ||
1982 test_bit(TCON_LINK_IN_TREE, &tlink->tl_flags)) {
1983 tlink->tl_time = jiffies;
1984 return;
1985 }
1986
1987 if (!IS_ERR(tlink_tcon(tlink)))
1988 cifs_put_tcon(tlink_tcon(tlink));
1989 kfree(tlink);
1990 return;
1991}
Jeff Laytond00c28d2010-04-24 07:57:44 -04001992
Linus Torvalds1da177e2005-04-16 15:20:36 -07001993int
Steve French50c2f752007-07-13 00:33:32 +00001994get_dfs_path(int xid, struct cifsSesInfo *pSesInfo, const char *old_path,
1995 const struct nls_table *nls_codepage, unsigned int *pnum_referrals,
Steve French366781c2008-01-25 10:12:41 +00001996 struct dfs_info3_param **preferrals, int remap)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001997{
1998 char *temp_unc;
1999 int rc = 0;
2000
2001 *pnum_referrals = 0;
Steve French366781c2008-01-25 10:12:41 +00002002 *preferrals = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002003
2004 if (pSesInfo->ipc_tid == 0) {
2005 temp_unc = kmalloc(2 /* for slashes */ +
Steve French50c2f752007-07-13 00:33:32 +00002006 strnlen(pSesInfo->serverName,
2007 SERVER_NAME_LEN_WITH_NULL * 2)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002008 + 1 + 4 /* slash IPC$ */ + 2,
2009 GFP_KERNEL);
2010 if (temp_unc == NULL)
2011 return -ENOMEM;
2012 temp_unc[0] = '\\';
2013 temp_unc[1] = '\\';
2014 strcpy(temp_unc + 2, pSesInfo->serverName);
2015 strcpy(temp_unc + 2 + strlen(pSesInfo->serverName), "\\IPC$");
2016 rc = CIFSTCon(xid, pSesInfo, temp_unc, NULL, nls_codepage);
Joe Perchesb6b38f72010-04-21 03:50:45 +00002017 cFYI(1, "CIFS Tcon rc = %d ipc_tid = %d", rc, pSesInfo->ipc_tid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002018 kfree(temp_unc);
2019 }
2020 if (rc == 0)
Steve Frenchc2cf07d2008-05-15 06:20:02 +00002021 rc = CIFSGetDFSRefer(xid, pSesInfo, old_path, preferrals,
Steve French737b7582005-04-28 22:41:06 -07002022 pnum_referrals, nls_codepage, remap);
Steve French366781c2008-01-25 10:12:41 +00002023 /* BB map targetUNCs to dfs_info3 structures, here or
2024 in CIFSGetDFSRefer BB */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002025
2026 return rc;
2027}
2028
Jeff Layton09e50d52008-07-23 10:11:19 -04002029#ifdef CONFIG_DEBUG_LOCK_ALLOC
2030static struct lock_class_key cifs_key[2];
2031static struct lock_class_key cifs_slock_key[2];
2032
2033static inline void
2034cifs_reclassify_socket4(struct socket *sock)
2035{
2036 struct sock *sk = sock->sk;
2037 BUG_ON(sock_owned_by_user(sk));
2038 sock_lock_init_class_and_name(sk, "slock-AF_INET-CIFS",
2039 &cifs_slock_key[0], "sk_lock-AF_INET-CIFS", &cifs_key[0]);
2040}
2041
2042static inline void
2043cifs_reclassify_socket6(struct socket *sock)
2044{
2045 struct sock *sk = sock->sk;
2046 BUG_ON(sock_owned_by_user(sk));
2047 sock_lock_init_class_and_name(sk, "slock-AF_INET6-CIFS",
2048 &cifs_slock_key[1], "sk_lock-AF_INET6-CIFS", &cifs_key[1]);
2049}
2050#else
2051static inline void
2052cifs_reclassify_socket4(struct socket *sock)
2053{
2054}
2055
2056static inline void
2057cifs_reclassify_socket6(struct socket *sock)
2058{
2059}
2060#endif
2061
Linus Torvalds1da177e2005-04-16 15:20:36 -07002062/* See RFC1001 section 14 on representation of Netbios names */
Steve French50c2f752007-07-13 00:33:32 +00002063static void rfc1002mangle(char *target, char *source, unsigned int length)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002064{
Steve French50c2f752007-07-13 00:33:32 +00002065 unsigned int i, j;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002066
Steve French50c2f752007-07-13 00:33:32 +00002067 for (i = 0, j = 0; i < (length); i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002068 /* mask a nibble at a time and encode */
2069 target[j] = 'A' + (0x0F & (source[i] >> 4));
2070 target[j+1] = 'A' + (0x0F & source[i]);
Steve French50c2f752007-07-13 00:33:32 +00002071 j += 2;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002072 }
2073
2074}
2075
Ben Greear3eb9a882010-09-01 17:06:02 -07002076static int
2077bind_socket(struct TCP_Server_Info *server)
2078{
2079 int rc = 0;
2080 if (server->srcaddr.ss_family != AF_UNSPEC) {
2081 /* Bind to the specified local IP address */
2082 struct socket *socket = server->ssocket;
2083 rc = socket->ops->bind(socket,
2084 (struct sockaddr *) &server->srcaddr,
2085 sizeof(server->srcaddr));
2086 if (rc < 0) {
2087 struct sockaddr_in *saddr4;
2088 struct sockaddr_in6 *saddr6;
2089 saddr4 = (struct sockaddr_in *)&server->srcaddr;
2090 saddr6 = (struct sockaddr_in6 *)&server->srcaddr;
2091 if (saddr6->sin6_family == AF_INET6)
2092 cERROR(1, "cifs: "
2093 "Failed to bind to: %pI6c, error: %d\n",
2094 &saddr6->sin6_addr, rc);
2095 else
2096 cERROR(1, "cifs: "
2097 "Failed to bind to: %pI4, error: %d\n",
2098 &saddr4->sin_addr.s_addr, rc);
2099 }
2100 }
2101 return rc;
2102}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002103
2104static int
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002105ipv4_connect(struct TCP_Server_Info *server)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002106{
2107 int rc = 0;
Steve French6a5fa2362010-01-01 01:28:43 +00002108 int val;
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002109 bool connected = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002110 __be16 orig_port = 0;
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002111 struct socket *socket = server->ssocket;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002112
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002113 if (socket == NULL) {
Steve French50c2f752007-07-13 00:33:32 +00002114 rc = sock_create_kern(PF_INET, SOCK_STREAM,
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002115 IPPROTO_TCP, &socket);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002116 if (rc < 0) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00002117 cERROR(1, "Error %d creating socket", rc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002118 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002119 }
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002120
2121 /* BB other socket options to set KEEPALIVE, NODELAY? */
Joe Perchesb6b38f72010-04-21 03:50:45 +00002122 cFYI(1, "Socket created");
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002123 server->ssocket = socket;
2124 socket->sk->sk_allocation = GFP_NOFS;
2125 cifs_reclassify_socket4(socket);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002126 }
2127
Ben Greear3eb9a882010-09-01 17:06:02 -07002128 rc = bind_socket(server);
2129 if (rc < 0)
2130 return rc;
2131
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002132 /* user overrode default port */
2133 if (server->addr.sockAddr.sin_port) {
2134 rc = socket->ops->connect(socket, (struct sockaddr *)
2135 &server->addr.sockAddr,
2136 sizeof(struct sockaddr_in), 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002137 if (rc >= 0)
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002138 connected = true;
Steve French50c2f752007-07-13 00:33:32 +00002139 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002140
Steve Frenchfb8c4b12007-07-10 01:16:18 +00002141 if (!connected) {
Steve French50c2f752007-07-13 00:33:32 +00002142 /* save original port so we can retry user specified port
Linus Torvalds1da177e2005-04-16 15:20:36 -07002143 later if fall back ports fail this time */
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002144 orig_port = server->addr.sockAddr.sin_port;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002145
2146 /* do not retry on the same port we just failed on */
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002147 if (server->addr.sockAddr.sin_port != htons(CIFS_PORT)) {
2148 server->addr.sockAddr.sin_port = htons(CIFS_PORT);
2149 rc = socket->ops->connect(socket,
2150 (struct sockaddr *)
2151 &server->addr.sockAddr,
2152 sizeof(struct sockaddr_in), 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002153 if (rc >= 0)
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002154 connected = true;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002155 }
2156 }
2157 if (!connected) {
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002158 server->addr.sockAddr.sin_port = htons(RFC1001_PORT);
2159 rc = socket->ops->connect(socket, (struct sockaddr *)
2160 &server->addr.sockAddr,
Cyrill Gorcunov6345a3a2007-10-16 17:57:55 +00002161 sizeof(struct sockaddr_in), 0);
Steve French50c2f752007-07-13 00:33:32 +00002162 if (rc >= 0)
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002163 connected = true;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002164 }
2165
2166 /* give up here - unless we want to retry on different
2167 protocol families some day */
2168 if (!connected) {
Steve Frenchfb8c4b12007-07-10 01:16:18 +00002169 if (orig_port)
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002170 server->addr.sockAddr.sin_port = orig_port;
Joe Perchesb6b38f72010-04-21 03:50:45 +00002171 cFYI(1, "Error %d connecting to server via ipv4", rc);
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002172 sock_release(socket);
2173 server->ssocket = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002174 return rc;
2175 }
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002176
2177
2178 /*
2179 * Eventually check for other socket options to change from
2180 * the default. sock_setsockopt not used because it expects
2181 * user space buffer
2182 */
2183 socket->sk->sk_rcvtimeo = 7 * HZ;
Steve Frenchda505c32009-01-19 03:49:35 +00002184 socket->sk->sk_sndtimeo = 5 * HZ;
Steve Frenchedf1ae42008-10-29 00:47:57 +00002185
Steve Frenchb387eae2005-10-10 14:21:15 -07002186 /* make the bufsizes depend on wsize/rsize and max requests */
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002187 if (server->noautotune) {
2188 if (socket->sk->sk_sndbuf < (200 * 1024))
2189 socket->sk->sk_sndbuf = 200 * 1024;
2190 if (socket->sk->sk_rcvbuf < (140 * 1024))
2191 socket->sk->sk_rcvbuf = 140 * 1024;
Steve Frenchedf1ae42008-10-29 00:47:57 +00002192 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002193
Steve French6a5fa2362010-01-01 01:28:43 +00002194 if (server->tcp_nodelay) {
2195 val = 1;
2196 rc = kernel_setsockopt(socket, SOL_TCP, TCP_NODELAY,
2197 (char *)&val, sizeof(val));
2198 if (rc)
Joe Perchesb6b38f72010-04-21 03:50:45 +00002199 cFYI(1, "set TCP_NODELAY socket option error %d", rc);
Steve French6a5fa2362010-01-01 01:28:43 +00002200 }
2201
Joe Perchesb6b38f72010-04-21 03:50:45 +00002202 cFYI(1, "sndbuf %d rcvbuf %d rcvtimeo 0x%lx",
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002203 socket->sk->sk_sndbuf,
Joe Perchesb6b38f72010-04-21 03:50:45 +00002204 socket->sk->sk_rcvbuf, socket->sk->sk_rcvtimeo);
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002205
Linus Torvalds1da177e2005-04-16 15:20:36 -07002206 /* send RFC1001 sessinit */
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002207 if (server->addr.sockAddr.sin_port == htons(RFC1001_PORT)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002208 /* some servers require RFC1001 sessinit before sending
Steve French50c2f752007-07-13 00:33:32 +00002209 negprot - BB check reconnection in case where second
Linus Torvalds1da177e2005-04-16 15:20:36 -07002210 sessinit is sent but no second negprot */
Steve French50c2f752007-07-13 00:33:32 +00002211 struct rfc1002_session_packet *ses_init_buf;
2212 struct smb_hdr *smb_buf;
2213 ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet),
2214 GFP_KERNEL);
Steve Frenchfb8c4b12007-07-10 01:16:18 +00002215 if (ses_init_buf) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002216 ses_init_buf->trailer.session_req.called_len = 32;
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002217 if (server->server_RFC1001_name &&
2218 server->server_RFC1001_name[0] != 0)
Jeff Layton8ecaf672008-12-01 15:23:50 -05002219 rfc1002mangle(ses_init_buf->trailer.
2220 session_req.called_name,
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002221 server->server_RFC1001_name,
Jeff Layton8ecaf672008-12-01 15:23:50 -05002222 RFC1001_NAME_LEN_WITH_NULL);
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002223 else
Jeff Layton8ecaf672008-12-01 15:23:50 -05002224 rfc1002mangle(ses_init_buf->trailer.
2225 session_req.called_name,
2226 DEFAULT_CIFS_CALLED_NAME,
2227 RFC1001_NAME_LEN_WITH_NULL);
Steve Frencha10faeb22005-08-22 21:38:31 -07002228
Linus Torvalds1da177e2005-04-16 15:20:36 -07002229 ses_init_buf->trailer.session_req.calling_len = 32;
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002230
Linus Torvalds1da177e2005-04-16 15:20:36 -07002231 /* calling name ends in null (byte 16) from old smb
2232 convention. */
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002233 if (server->workstation_RFC1001_name &&
2234 server->workstation_RFC1001_name[0] != 0)
Jeff Layton8ecaf672008-12-01 15:23:50 -05002235 rfc1002mangle(ses_init_buf->trailer.
2236 session_req.calling_name,
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002237 server->workstation_RFC1001_name,
Jeff Layton8ecaf672008-12-01 15:23:50 -05002238 RFC1001_NAME_LEN_WITH_NULL);
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002239 else
Jeff Layton8ecaf672008-12-01 15:23:50 -05002240 rfc1002mangle(ses_init_buf->trailer.
2241 session_req.calling_name,
2242 "LINUX_CIFS_CLNT",
2243 RFC1001_NAME_LEN_WITH_NULL);
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002244
Linus Torvalds1da177e2005-04-16 15:20:36 -07002245 ses_init_buf->trailer.session_req.scope1 = 0;
2246 ses_init_buf->trailer.session_req.scope2 = 0;
2247 smb_buf = (struct smb_hdr *)ses_init_buf;
2248 /* sizeof RFC1002_SESSION_REQUEST with no scope */
2249 smb_buf->smb_buf_length = 0x81000044;
Jeff Layton0496e022008-12-30 12:39:16 -05002250 rc = smb_send(server, smb_buf, 0x44);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002251 kfree(ses_init_buf);
Steve French50c2f752007-07-13 00:33:32 +00002252 msleep(1); /* RFC1001 layer in at least one server
Steve French083d3a22006-03-03 09:53:36 +00002253 requires very short break before negprot
2254 presumably because not expecting negprot
2255 to follow so fast. This is a simple
Steve French50c2f752007-07-13 00:33:32 +00002256 solution that works without
Steve French083d3a22006-03-03 09:53:36 +00002257 complicating the code and causes no
2258 significant slowing down on mount
2259 for everyone else */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002260 }
Steve French50c2f752007-07-13 00:33:32 +00002261 /* else the negprot may still work without this
Linus Torvalds1da177e2005-04-16 15:20:36 -07002262 even though malloc failed */
Steve French50c2f752007-07-13 00:33:32 +00002263
Linus Torvalds1da177e2005-04-16 15:20:36 -07002264 }
Steve French50c2f752007-07-13 00:33:32 +00002265
Linus Torvalds1da177e2005-04-16 15:20:36 -07002266 return rc;
2267}
2268
2269static int
Jeff Laytond5c56052008-12-01 18:42:33 -05002270ipv6_connect(struct TCP_Server_Info *server)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002271{
2272 int rc = 0;
Steve French6a5fa2362010-01-01 01:28:43 +00002273 int val;
Jeff Laytond5c56052008-12-01 18:42:33 -05002274 bool connected = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002275 __be16 orig_port = 0;
Jeff Laytond5c56052008-12-01 18:42:33 -05002276 struct socket *socket = server->ssocket;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002277
Jeff Laytond5c56052008-12-01 18:42:33 -05002278 if (socket == NULL) {
Steve French50c2f752007-07-13 00:33:32 +00002279 rc = sock_create_kern(PF_INET6, SOCK_STREAM,
Jeff Laytond5c56052008-12-01 18:42:33 -05002280 IPPROTO_TCP, &socket);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002281 if (rc < 0) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00002282 cERROR(1, "Error %d creating ipv6 socket", rc);
Jeff Laytond5c56052008-12-01 18:42:33 -05002283 socket = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002284 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002285 }
Jeff Laytond5c56052008-12-01 18:42:33 -05002286
2287 /* BB other socket options to set KEEPALIVE, NODELAY? */
Joe Perchesb6b38f72010-04-21 03:50:45 +00002288 cFYI(1, "ipv6 Socket created");
Jeff Laytond5c56052008-12-01 18:42:33 -05002289 server->ssocket = socket;
2290 socket->sk->sk_allocation = GFP_NOFS;
2291 cifs_reclassify_socket6(socket);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002292 }
2293
Ben Greear3eb9a882010-09-01 17:06:02 -07002294 rc = bind_socket(server);
2295 if (rc < 0)
2296 return rc;
2297
Jeff Laytond5c56052008-12-01 18:42:33 -05002298 /* user overrode default port */
2299 if (server->addr.sockAddr6.sin6_port) {
2300 rc = socket->ops->connect(socket,
2301 (struct sockaddr *) &server->addr.sockAddr6,
Cyrill Gorcunov6345a3a2007-10-16 17:57:55 +00002302 sizeof(struct sockaddr_in6), 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002303 if (rc >= 0)
Jeff Laytond5c56052008-12-01 18:42:33 -05002304 connected = true;
Steve French50c2f752007-07-13 00:33:32 +00002305 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002306
Steve Frenchfb8c4b12007-07-10 01:16:18 +00002307 if (!connected) {
Steve French50c2f752007-07-13 00:33:32 +00002308 /* save original port so we can retry user specified port
Linus Torvalds1da177e2005-04-16 15:20:36 -07002309 later if fall back ports fail this time */
2310
Jeff Laytond5c56052008-12-01 18:42:33 -05002311 orig_port = server->addr.sockAddr6.sin6_port;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002312 /* do not retry on the same port we just failed on */
Jeff Laytond5c56052008-12-01 18:42:33 -05002313 if (server->addr.sockAddr6.sin6_port != htons(CIFS_PORT)) {
2314 server->addr.sockAddr6.sin6_port = htons(CIFS_PORT);
2315 rc = socket->ops->connect(socket, (struct sockaddr *)
2316 &server->addr.sockAddr6,
Cyrill Gorcunov6345a3a2007-10-16 17:57:55 +00002317 sizeof(struct sockaddr_in6), 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002318 if (rc >= 0)
Jeff Laytond5c56052008-12-01 18:42:33 -05002319 connected = true;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002320 }
2321 }
2322 if (!connected) {
Jeff Laytond5c56052008-12-01 18:42:33 -05002323 server->addr.sockAddr6.sin6_port = htons(RFC1001_PORT);
2324 rc = socket->ops->connect(socket, (struct sockaddr *)
2325 &server->addr.sockAddr6,
2326 sizeof(struct sockaddr_in6), 0);
Steve French50c2f752007-07-13 00:33:32 +00002327 if (rc >= 0)
Jeff Laytond5c56052008-12-01 18:42:33 -05002328 connected = true;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002329 }
2330
2331 /* give up here - unless we want to retry on different
2332 protocol families some day */
2333 if (!connected) {
Steve Frenchfb8c4b12007-07-10 01:16:18 +00002334 if (orig_port)
Jeff Laytond5c56052008-12-01 18:42:33 -05002335 server->addr.sockAddr6.sin6_port = orig_port;
Joe Perchesb6b38f72010-04-21 03:50:45 +00002336 cFYI(1, "Error %d connecting to server via ipv6", rc);
Jeff Laytond5c56052008-12-01 18:42:33 -05002337 sock_release(socket);
2338 server->ssocket = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002339 return rc;
2340 }
Steve Frenchedf1ae42008-10-29 00:47:57 +00002341
Jeff Laytond5c56052008-12-01 18:42:33 -05002342 /*
2343 * Eventually check for other socket options to change from
2344 * the default. sock_setsockopt not used because it expects
2345 * user space buffer
2346 */
2347 socket->sk->sk_rcvtimeo = 7 * HZ;
Steve Frenchda505c32009-01-19 03:49:35 +00002348 socket->sk->sk_sndtimeo = 5 * HZ;
Steve French6a5fa2362010-01-01 01:28:43 +00002349
2350 if (server->tcp_nodelay) {
2351 val = 1;
2352 rc = kernel_setsockopt(socket, SOL_TCP, TCP_NODELAY,
2353 (char *)&val, sizeof(val));
2354 if (rc)
Joe Perchesb6b38f72010-04-21 03:50:45 +00002355 cFYI(1, "set TCP_NODELAY socket option error %d", rc);
Steve French6a5fa2362010-01-01 01:28:43 +00002356 }
2357
Jeff Laytond5c56052008-12-01 18:42:33 -05002358 server->ssocket = socket;
Steve French50c2f752007-07-13 00:33:32 +00002359
Linus Torvalds1da177e2005-04-16 15:20:36 -07002360 return rc;
2361}
2362
Steve French50c2f752007-07-13 00:33:32 +00002363void reset_cifs_unix_caps(int xid, struct cifsTconInfo *tcon,
2364 struct super_block *sb, struct smb_vol *vol_info)
Steve French8af18972007-02-14 04:42:51 +00002365{
2366 /* if we are reconnecting then should we check to see if
2367 * any requested capabilities changed locally e.g. via
2368 * remount but we can not do much about it here
2369 * if they have (even if we could detect it by the following)
2370 * Perhaps we could add a backpointer to array of sb from tcon
2371 * or if we change to make all sb to same share the same
2372 * sb as NFS - then we only have one backpointer to sb.
2373 * What if we wanted to mount the server share twice once with
2374 * and once without posixacls or posix paths? */
2375 __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
Steve French50c2f752007-07-13 00:33:32 +00002376
Steve Frenchc18c8422007-07-18 23:21:09 +00002377 if (vol_info && vol_info->no_linux_ext) {
2378 tcon->fsUnixInfo.Capability = 0;
2379 tcon->unix_ext = 0; /* Unix Extensions disabled */
Joe Perchesb6b38f72010-04-21 03:50:45 +00002380 cFYI(1, "Linux protocol extensions disabled");
Steve Frenchc18c8422007-07-18 23:21:09 +00002381 return;
2382 } else if (vol_info)
2383 tcon->unix_ext = 1; /* Unix Extensions supported */
2384
2385 if (tcon->unix_ext == 0) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00002386 cFYI(1, "Unix extensions disabled so not set on reconnect");
Steve Frenchc18c8422007-07-18 23:21:09 +00002387 return;
2388 }
Steve French50c2f752007-07-13 00:33:32 +00002389
Steve Frenchfb8c4b12007-07-10 01:16:18 +00002390 if (!CIFSSMBQFSUnixInfo(xid, tcon)) {
Steve French8af18972007-02-14 04:42:51 +00002391 __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
Steve French50c2f752007-07-13 00:33:32 +00002392
Steve French8af18972007-02-14 04:42:51 +00002393 /* check for reconnect case in which we do not
2394 want to change the mount behavior if we can avoid it */
Steve Frenchfb8c4b12007-07-10 01:16:18 +00002395 if (vol_info == NULL) {
Steve French50c2f752007-07-13 00:33:32 +00002396 /* turn off POSIX ACL and PATHNAMES if not set
Steve French8af18972007-02-14 04:42:51 +00002397 originally at mount time */
2398 if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0)
2399 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
Igor Mammedov11b6d642008-02-15 19:06:04 +00002400 if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
2401 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
Joe Perchesb6b38f72010-04-21 03:50:45 +00002402 cERROR(1, "POSIXPATH support change");
Steve French8af18972007-02-14 04:42:51 +00002403 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
Igor Mammedov11b6d642008-02-15 19:06:04 +00002404 } else if ((cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00002405 cERROR(1, "possible reconnect error");
2406 cERROR(1, "server disabled POSIX path support");
Igor Mammedov11b6d642008-02-15 19:06:04 +00002407 }
Steve French8af18972007-02-14 04:42:51 +00002408 }
Steve French50c2f752007-07-13 00:33:32 +00002409
Steve French8af18972007-02-14 04:42:51 +00002410 cap &= CIFS_UNIX_CAP_MASK;
Steve French75865f8c2007-06-24 18:30:48 +00002411 if (vol_info && vol_info->no_psx_acl)
Steve French8af18972007-02-14 04:42:51 +00002412 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
Steve French75865f8c2007-06-24 18:30:48 +00002413 else if (CIFS_UNIX_POSIX_ACL_CAP & cap) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00002414 cFYI(1, "negotiated posix acl support");
Steve Frenchfb8c4b12007-07-10 01:16:18 +00002415 if (sb)
Steve French8af18972007-02-14 04:42:51 +00002416 sb->s_flags |= MS_POSIXACL;
2417 }
2418
Steve French75865f8c2007-06-24 18:30:48 +00002419 if (vol_info && vol_info->posix_paths == 0)
Steve French8af18972007-02-14 04:42:51 +00002420 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
Steve French75865f8c2007-06-24 18:30:48 +00002421 else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00002422 cFYI(1, "negotiate posix pathnames");
Steve French75865f8c2007-06-24 18:30:48 +00002423 if (sb)
Steve French50c2f752007-07-13 00:33:32 +00002424 CIFS_SB(sb)->mnt_cifs_flags |=
Steve French8af18972007-02-14 04:42:51 +00002425 CIFS_MOUNT_POSIX_PATHS;
2426 }
Steve French50c2f752007-07-13 00:33:32 +00002427
Steve French984acfe2007-04-26 16:42:50 +00002428 /* We might be setting the path sep back to a different
2429 form if we are reconnecting and the server switched its
Steve French50c2f752007-07-13 00:33:32 +00002430 posix path capability for this share */
Steve French75865f8c2007-06-24 18:30:48 +00002431 if (sb && (CIFS_SB(sb)->prepathlen > 0))
Steve French984acfe2007-04-26 16:42:50 +00002432 CIFS_SB(sb)->prepath[0] = CIFS_DIR_SEP(CIFS_SB(sb));
Steve French75865f8c2007-06-24 18:30:48 +00002433
2434 if (sb && (CIFS_SB(sb)->rsize > 127 * 1024)) {
2435 if ((cap & CIFS_UNIX_LARGE_READ_CAP) == 0) {
2436 CIFS_SB(sb)->rsize = 127 * 1024;
Joe Perchesb6b38f72010-04-21 03:50:45 +00002437 cFYI(DBG2, "larger reads not supported by srv");
Steve French75865f8c2007-06-24 18:30:48 +00002438 }
2439 }
Steve French50c2f752007-07-13 00:33:32 +00002440
2441
Joe Perchesb6b38f72010-04-21 03:50:45 +00002442 cFYI(1, "Negotiate caps 0x%x", (int)cap);
Steve French8af18972007-02-14 04:42:51 +00002443#ifdef CONFIG_CIFS_DEBUG2
Steve French75865f8c2007-06-24 18:30:48 +00002444 if (cap & CIFS_UNIX_FCNTL_CAP)
Joe Perchesb6b38f72010-04-21 03:50:45 +00002445 cFYI(1, "FCNTL cap");
Steve French75865f8c2007-06-24 18:30:48 +00002446 if (cap & CIFS_UNIX_EXTATTR_CAP)
Joe Perchesb6b38f72010-04-21 03:50:45 +00002447 cFYI(1, "EXTATTR cap");
Steve French75865f8c2007-06-24 18:30:48 +00002448 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
Joe Perchesb6b38f72010-04-21 03:50:45 +00002449 cFYI(1, "POSIX path cap");
Steve French75865f8c2007-06-24 18:30:48 +00002450 if (cap & CIFS_UNIX_XATTR_CAP)
Joe Perchesb6b38f72010-04-21 03:50:45 +00002451 cFYI(1, "XATTR cap");
Steve French75865f8c2007-06-24 18:30:48 +00002452 if (cap & CIFS_UNIX_POSIX_ACL_CAP)
Joe Perchesb6b38f72010-04-21 03:50:45 +00002453 cFYI(1, "POSIX ACL cap");
Steve French75865f8c2007-06-24 18:30:48 +00002454 if (cap & CIFS_UNIX_LARGE_READ_CAP)
Joe Perchesb6b38f72010-04-21 03:50:45 +00002455 cFYI(1, "very large read cap");
Steve French75865f8c2007-06-24 18:30:48 +00002456 if (cap & CIFS_UNIX_LARGE_WRITE_CAP)
Joe Perchesb6b38f72010-04-21 03:50:45 +00002457 cFYI(1, "very large write cap");
Steve French8af18972007-02-14 04:42:51 +00002458#endif /* CIFS_DEBUG2 */
2459 if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) {
Steve French442aa312007-09-24 20:25:46 +00002460 if (vol_info == NULL) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00002461 cFYI(1, "resetting capabilities failed");
Steve French442aa312007-09-24 20:25:46 +00002462 } else
Joe Perchesb6b38f72010-04-21 03:50:45 +00002463 cERROR(1, "Negotiating Unix capabilities "
Steve French5a44b312007-09-20 15:16:24 +00002464 "with the server failed. Consider "
2465 "mounting with the Unix Extensions\n"
2466 "disabled, if problems are found, "
2467 "by specifying the nounix mount "
Joe Perchesb6b38f72010-04-21 03:50:45 +00002468 "option.");
Steve French5a44b312007-09-20 15:16:24 +00002469
Steve French8af18972007-02-14 04:42:51 +00002470 }
2471 }
2472}
2473
Steve French03a143c2008-02-14 06:38:30 +00002474static void
2475convert_delimiter(char *path, char delim)
2476{
2477 int i;
Steve Frenchc2d68ea2008-02-15 19:20:18 +00002478 char old_delim;
Steve French03a143c2008-02-14 06:38:30 +00002479
2480 if (path == NULL)
2481 return;
2482
Steve French582d21e2008-05-13 04:54:12 +00002483 if (delim == '/')
Steve Frenchc2d68ea2008-02-15 19:20:18 +00002484 old_delim = '\\';
2485 else
2486 old_delim = '/';
2487
Steve French03a143c2008-02-14 06:38:30 +00002488 for (i = 0; path[i] != '\0'; i++) {
Steve Frenchc2d68ea2008-02-15 19:20:18 +00002489 if (path[i] == old_delim)
Steve French03a143c2008-02-14 06:38:30 +00002490 path[i] = delim;
2491 }
2492}
2493
Steve French3b795212008-11-13 19:45:32 +00002494static void setup_cifs_sb(struct smb_vol *pvolume_info,
2495 struct cifs_sb_info *cifs_sb)
Jeff Laytonb1c8d2b2008-10-22 13:57:07 -04002496{
Steve French3b795212008-11-13 19:45:32 +00002497 if (pvolume_info->rsize > CIFSMaxBufSize) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00002498 cERROR(1, "rsize %d too large, using MaxBufSize",
2499 pvolume_info->rsize);
Steve French3b795212008-11-13 19:45:32 +00002500 cifs_sb->rsize = CIFSMaxBufSize;
2501 } else if ((pvolume_info->rsize) &&
2502 (pvolume_info->rsize <= CIFSMaxBufSize))
2503 cifs_sb->rsize = pvolume_info->rsize;
2504 else /* default */
2505 cifs_sb->rsize = CIFSMaxBufSize;
Jeff Laytonb1c8d2b2008-10-22 13:57:07 -04002506
Steve French3b795212008-11-13 19:45:32 +00002507 if (pvolume_info->wsize > PAGEVEC_SIZE * PAGE_CACHE_SIZE) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00002508 cERROR(1, "wsize %d too large, using 4096 instead",
2509 pvolume_info->wsize);
Steve French3b795212008-11-13 19:45:32 +00002510 cifs_sb->wsize = 4096;
2511 } else if (pvolume_info->wsize)
2512 cifs_sb->wsize = pvolume_info->wsize;
2513 else
2514 cifs_sb->wsize = min_t(const int,
2515 PAGEVEC_SIZE * PAGE_CACHE_SIZE,
2516 127*1024);
2517 /* old default of CIFSMaxBufSize was too small now
2518 that SMB Write2 can send multiple pages in kvec.
2519 RFC1001 does not describe what happens when frame
2520 bigger than 128K is sent so use that as max in
2521 conjunction with 52K kvec constraint on arch with 4K
2522 page size */
2523
2524 if (cifs_sb->rsize < 2048) {
2525 cifs_sb->rsize = 2048;
2526 /* Windows ME may prefer this */
Joe Perchesb6b38f72010-04-21 03:50:45 +00002527 cFYI(1, "readsize set to minimum: 2048");
Steve French3b795212008-11-13 19:45:32 +00002528 }
2529 /* calculate prepath */
2530 cifs_sb->prepath = pvolume_info->prepath;
2531 if (cifs_sb->prepath) {
2532 cifs_sb->prepathlen = strlen(cifs_sb->prepath);
2533 /* we can not convert the / to \ in the path
2534 separators in the prefixpath yet because we do not
2535 know (until reset_cifs_unix_caps is called later)
2536 whether POSIX PATH CAP is available. We normalize
2537 the / to \ after reset_cifs_unix_caps is called */
2538 pvolume_info->prepath = NULL;
2539 } else
2540 cifs_sb->prepathlen = 0;
2541 cifs_sb->mnt_uid = pvolume_info->linux_uid;
2542 cifs_sb->mnt_gid = pvolume_info->linux_gid;
2543 cifs_sb->mnt_file_mode = pvolume_info->file_mode;
2544 cifs_sb->mnt_dir_mode = pvolume_info->dir_mode;
Joe Perchesb6b38f72010-04-21 03:50:45 +00002545 cFYI(1, "file mode: 0x%x dir mode: 0x%x",
2546 cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode);
Steve French3b795212008-11-13 19:45:32 +00002547
2548 if (pvolume_info->noperm)
2549 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM;
2550 if (pvolume_info->setuids)
2551 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID;
2552 if (pvolume_info->server_ino)
2553 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM;
2554 if (pvolume_info->remap)
2555 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR;
2556 if (pvolume_info->no_xattr)
2557 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR;
2558 if (pvolume_info->sfu_emul)
2559 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL;
2560 if (pvolume_info->nobrl)
2561 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL;
Steve Frenchbe652442009-02-23 15:21:59 +00002562 if (pvolume_info->nostrictsync)
Steve French4717bed2009-02-24 14:44:19 +00002563 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOSSYNC;
Steve French13a6e422008-12-02 17:24:33 +00002564 if (pvolume_info->mand_lock)
2565 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL;
Steve French3b795212008-11-13 19:45:32 +00002566 if (pvolume_info->cifs_acl)
2567 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL;
2568 if (pvolume_info->override_uid)
2569 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID;
2570 if (pvolume_info->override_gid)
2571 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID;
2572 if (pvolume_info->dynperm)
2573 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM;
Suresh Jayaramanfa1df752010-07-05 18:13:36 +05302574 if (pvolume_info->fsc)
2575 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_FSCACHE;
Jeff Layton0eb8a132010-10-06 19:51:12 -04002576 if (pvolume_info->multiuser)
2577 cifs_sb->mnt_cifs_flags |= (CIFS_MOUNT_MULTIUSER |
2578 CIFS_MOUNT_NO_PERM);
Steve French3b795212008-11-13 19:45:32 +00002579 if (pvolume_info->direct_io) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00002580 cFYI(1, "mounting share using direct i/o");
Steve French3b795212008-11-13 19:45:32 +00002581 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO;
2582 }
Stefan Metzmacher736a33202010-07-30 14:56:00 +02002583 if (pvolume_info->mfsymlinks) {
2584 if (pvolume_info->sfu_emul) {
2585 cERROR(1, "mount option mfsymlinks ignored if sfu "
2586 "mount option is used");
2587 } else {
2588 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MF_SYMLINKS;
2589 }
2590 }
Steve French3b795212008-11-13 19:45:32 +00002591
2592 if ((pvolume_info->cifs_acl) && (pvolume_info->dynperm))
Joe Perchesb6b38f72010-04-21 03:50:45 +00002593 cERROR(1, "mount option dynperm ignored if cifsacl "
2594 "mount option supported");
Jeff Laytonb1c8d2b2008-10-22 13:57:07 -04002595}
2596
Igor Mammedove4cce942009-02-10 14:10:26 +03002597static int
2598is_path_accessible(int xid, struct cifsTconInfo *tcon,
2599 struct cifs_sb_info *cifs_sb, const char *full_path)
2600{
2601 int rc;
Igor Mammedove4cce942009-02-10 14:10:26 +03002602 FILE_ALL_INFO *pfile_info;
2603
Igor Mammedove4cce942009-02-10 14:10:26 +03002604 pfile_info = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
2605 if (pfile_info == NULL)
2606 return -ENOMEM;
2607
2608 rc = CIFSSMBQPathInfo(xid, tcon, full_path, pfile_info,
2609 0 /* not legacy */, cifs_sb->local_nls,
2610 cifs_sb->mnt_cifs_flags &
2611 CIFS_MOUNT_MAP_SPECIAL_CHR);
2612 kfree(pfile_info);
2613 return rc;
2614}
2615
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002616static void
2617cleanup_volume_info(struct smb_vol **pvolume_info)
2618{
2619 struct smb_vol *volume_info;
2620
Dan Carpenterad6cca62010-04-26 12:10:06 +02002621 if (!pvolume_info || !*pvolume_info)
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002622 return;
2623
2624 volume_info = *pvolume_info;
2625 kzfree(volume_info->password);
2626 kfree(volume_info->UNC);
2627 kfree(volume_info->prepath);
2628 kfree(volume_info);
2629 *pvolume_info = NULL;
2630 return;
2631}
2632
Steve French2d6d5892009-04-09 00:36:44 +00002633#ifdef CONFIG_CIFS_DFS_UPCALL
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002634/* build_path_to_root returns full path to root when
2635 * we do not have an exiting connection (tcon) */
2636static char *
2637build_unc_path_to_root(const struct smb_vol *volume_info,
2638 const struct cifs_sb_info *cifs_sb)
2639{
2640 char *full_path;
2641
2642 int unc_len = strnlen(volume_info->UNC, MAX_TREE_SIZE + 1);
2643 full_path = kmalloc(unc_len + cifs_sb->prepathlen + 1, GFP_KERNEL);
2644 if (full_path == NULL)
2645 return ERR_PTR(-ENOMEM);
2646
2647 strncpy(full_path, volume_info->UNC, unc_len);
2648 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) {
2649 int i;
2650 for (i = 0; i < unc_len; i++) {
2651 if (full_path[i] == '\\')
2652 full_path[i] = '/';
2653 }
2654 }
2655
2656 if (cifs_sb->prepathlen)
2657 strncpy(full_path + unc_len, cifs_sb->prepath,
2658 cifs_sb->prepathlen);
2659
2660 full_path[unc_len + cifs_sb->prepathlen] = 0; /* add trailing null */
2661 return full_path;
2662}
Steve French2d6d5892009-04-09 00:36:44 +00002663#endif
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002664
Linus Torvalds1da177e2005-04-16 15:20:36 -07002665int
2666cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002667 char *mount_data_global, const char *devname)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002668{
Jeff Laytona2934c72009-12-03 08:09:41 -05002669 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002670 int xid;
Jeff Layton7586b762008-12-01 18:41:49 -05002671 struct smb_vol *volume_info;
Jeff Laytona2934c72009-12-03 08:09:41 -05002672 struct cifsSesInfo *pSesInfo;
2673 struct cifsTconInfo *tcon;
2674 struct TCP_Server_Info *srvTcp;
Igor Mammedove4cce942009-02-10 14:10:26 +03002675 char *full_path;
Steve French2d6d5892009-04-09 00:36:44 +00002676 char *mount_data = mount_data_global;
Jeff Layton9d002df2010-10-06 19:51:11 -04002677 struct tcon_link *tlink;
Steve French2d6d5892009-04-09 00:36:44 +00002678#ifdef CONFIG_CIFS_DFS_UPCALL
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002679 struct dfs_info3_param *referrals = NULL;
2680 unsigned int num_referrals = 0;
Igor Mammedov5c2503a2009-04-21 19:31:05 +04002681 int referral_walks_count = 0;
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002682try_mount_again:
Steve French2d6d5892009-04-09 00:36:44 +00002683#endif
Jeff Laytona2934c72009-12-03 08:09:41 -05002684 rc = 0;
2685 tcon = NULL;
2686 pSesInfo = NULL;
2687 srvTcp = NULL;
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002688 full_path = NULL;
Jeff Layton9d002df2010-10-06 19:51:11 -04002689 tlink = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002690
2691 xid = GetXid();
2692
Jeff Layton7586b762008-12-01 18:41:49 -05002693 volume_info = kzalloc(sizeof(struct smb_vol), GFP_KERNEL);
2694 if (!volume_info) {
2695 rc = -ENOMEM;
2696 goto out;
2697 }
Steve French50c2f752007-07-13 00:33:32 +00002698
Jeff Layton7586b762008-12-01 18:41:49 -05002699 if (cifs_parse_mount_options(mount_data, devname, volume_info)) {
Jeff Layton70fe7dc2007-11-16 22:21:07 +00002700 rc = -EINVAL;
2701 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002702 }
2703
Jeff Layton7586b762008-12-01 18:41:49 -05002704 if (volume_info->nullauth) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00002705 cFYI(1, "null user");
Jeff Layton7586b762008-12-01 18:41:49 -05002706 volume_info->username = "";
2707 } else if (volume_info->username) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002708 /* BB fixme parse for domain name here */
Joe Perchesb6b38f72010-04-21 03:50:45 +00002709 cFYI(1, "Username: %s", volume_info->username);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002710 } else {
Steve Frenchbf820672005-12-01 22:32:42 -08002711 cifserror("No username specified");
Steve French50c2f752007-07-13 00:33:32 +00002712 /* In userspace mount helper we can get user name from alternate
2713 locations such as env variables and files on disk */
Jeff Layton70fe7dc2007-11-16 22:21:07 +00002714 rc = -EINVAL;
2715 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002716 }
2717
Linus Torvalds1da177e2005-04-16 15:20:36 -07002718 /* this is needed for ASCII cp to Unicode converts */
Jeff Layton7586b762008-12-01 18:41:49 -05002719 if (volume_info->iocharset == NULL) {
Jeff Laytona5fc4ce2010-04-24 07:57:42 -04002720 /* load_nls_default cannot return null */
2721 volume_info->local_nls = load_nls_default();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002722 } else {
Jeff Laytona5fc4ce2010-04-24 07:57:42 -04002723 volume_info->local_nls = load_nls(volume_info->iocharset);
2724 if (volume_info->local_nls == NULL) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00002725 cERROR(1, "CIFS mount error: iocharset %s not found",
2726 volume_info->iocharset);
Jeff Layton70fe7dc2007-11-16 22:21:07 +00002727 rc = -ELIBACC;
2728 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002729 }
2730 }
Jeff Laytona5fc4ce2010-04-24 07:57:42 -04002731 cifs_sb->local_nls = volume_info->local_nls;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002732
Jeff Layton63c038c2008-12-01 18:41:46 -05002733 /* get a reference to a tcp session */
Jeff Layton7586b762008-12-01 18:41:49 -05002734 srvTcp = cifs_get_tcp_session(volume_info);
Jeff Layton63c038c2008-12-01 18:41:46 -05002735 if (IS_ERR(srvTcp)) {
2736 rc = PTR_ERR(srvTcp);
2737 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002738 }
2739
Jeff Layton36988c72010-04-24 07:57:43 -04002740 /* get a reference to a SMB session */
2741 pSesInfo = cifs_get_smb_ses(srvTcp, volume_info);
2742 if (IS_ERR(pSesInfo)) {
2743 rc = PTR_ERR(pSesInfo);
2744 pSesInfo = NULL;
2745 goto mount_fail_check;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002746 }
Steve French50c2f752007-07-13 00:33:32 +00002747
Jeff Laytond00c28d2010-04-24 07:57:44 -04002748 setup_cifs_sb(volume_info, cifs_sb);
2749 if (pSesInfo->capabilities & CAP_LARGE_FILES)
2750 sb->s_maxbytes = MAX_LFS_FILESIZE;
2751 else
2752 sb->s_maxbytes = MAX_NON_LFS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002753
Steve French8af18972007-02-14 04:42:51 +00002754 /* BB FIXME fix time_gran to be larger for LANMAN sessions */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002755 sb->s_time_gran = 100;
2756
Jeff Laytond00c28d2010-04-24 07:57:44 -04002757 /* search for existing tcon to this server share */
2758 tcon = cifs_get_tcon(pSesInfo, volume_info);
2759 if (IS_ERR(tcon)) {
2760 rc = PTR_ERR(tcon);
2761 tcon = NULL;
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002762 goto remote_path_check;
Jeff Laytond00c28d2010-04-24 07:57:44 -04002763 }
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002764
Steve Frenchd82c2df2008-11-15 00:07:26 +00002765 /* do not care if following two calls succeed - informational */
2766 if (!tcon->ipc) {
2767 CIFSSMBQFSDeviceInfo(xid, tcon);
2768 CIFSSMBQFSAttributeInfo(xid, tcon);
2769 }
2770
2771 /* tell server which Unix caps we support */
2772 if (tcon->ses->capabilities & CAP_UNIX)
2773 /* reset of caps checks mount to see if unix extensions
2774 disabled for just this mount */
Jeff Layton7586b762008-12-01 18:41:49 -05002775 reset_cifs_unix_caps(xid, tcon, sb, volume_info);
Steve Frenchd82c2df2008-11-15 00:07:26 +00002776 else
2777 tcon->unix_ext = 0; /* server does not support them */
2778
2779 /* convert forward to back slashes in prepath here if needed */
2780 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) == 0)
2781 convert_delimiter(cifs_sb->prepath, CIFS_DIR_SEP(cifs_sb));
2782
2783 if ((tcon->unix_ext == 0) && (cifs_sb->rsize > (1024 * 127))) {
2784 cifs_sb->rsize = 1024 * 127;
Joe Perchesb6b38f72010-04-21 03:50:45 +00002785 cFYI(DBG2, "no very large read support, rsize now 127K");
Steve Frenchd82c2df2008-11-15 00:07:26 +00002786 }
2787 if (!(tcon->ses->capabilities & CAP_LARGE_WRITE_X))
2788 cifs_sb->wsize = min(cifs_sb->wsize,
2789 (tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE));
2790 if (!(tcon->ses->capabilities & CAP_LARGE_READ_X))
2791 cifs_sb->rsize = min(cifs_sb->rsize,
2792 (tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002793
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002794remote_path_check:
2795 /* check if a whole path (including prepath) is not remote */
2796 if (!rc && cifs_sb->prepathlen && tcon) {
Igor Mammedove4cce942009-02-10 14:10:26 +03002797 /* build_path_to_root works only when we have a valid tcon */
2798 full_path = cifs_build_path_to_root(cifs_sb);
2799 if (full_path == NULL) {
2800 rc = -ENOMEM;
2801 goto mount_fail_check;
2802 }
2803 rc = is_path_accessible(xid, tcon, cifs_sb, full_path);
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002804 if (rc != -EREMOTE) {
Igor Mammedove4cce942009-02-10 14:10:26 +03002805 kfree(full_path);
2806 goto mount_fail_check;
2807 }
2808 kfree(full_path);
2809 }
2810
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002811 /* get referral if needed */
2812 if (rc == -EREMOTE) {
Steve Frenchd036f502009-04-03 03:12:08 +00002813#ifdef CONFIG_CIFS_DFS_UPCALL
Igor Mammedov5c2503a2009-04-21 19:31:05 +04002814 if (referral_walks_count > MAX_NESTED_LINKS) {
2815 /*
2816 * BB: when we implement proper loop detection,
2817 * we will remove this check. But now we need it
2818 * to prevent an indefinite loop if 'DFS tree' is
2819 * misconfigured (i.e. has loops).
2820 */
2821 rc = -ELOOP;
2822 goto mount_fail_check;
2823 }
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002824 /* convert forward to back slashes in prepath here if needed */
2825 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) == 0)
2826 convert_delimiter(cifs_sb->prepath,
2827 CIFS_DIR_SEP(cifs_sb));
2828 full_path = build_unc_path_to_root(volume_info, cifs_sb);
2829 if (IS_ERR(full_path)) {
2830 rc = PTR_ERR(full_path);
2831 goto mount_fail_check;
2832 }
2833
Joe Perchesb6b38f72010-04-21 03:50:45 +00002834 cFYI(1, "Getting referral for: %s", full_path);
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002835 rc = get_dfs_path(xid, pSesInfo , full_path + 1,
2836 cifs_sb->local_nls, &num_referrals, &referrals,
2837 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
2838 if (!rc && num_referrals > 0) {
2839 char *fake_devname = NULL;
2840
2841 if (mount_data != mount_data_global)
2842 kfree(mount_data);
Jeff Layton7b91e262009-07-23 15:22:30 -04002843
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002844 mount_data = cifs_compose_mount_options(
2845 cifs_sb->mountdata, full_path + 1,
2846 referrals, &fake_devname);
Jeff Layton7b91e262009-07-23 15:22:30 -04002847
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002848 free_dfs_info_array(referrals, num_referrals);
Jeff Layton7b91e262009-07-23 15:22:30 -04002849 kfree(fake_devname);
2850 kfree(full_path);
2851
2852 if (IS_ERR(mount_data)) {
2853 rc = PTR_ERR(mount_data);
2854 mount_data = NULL;
2855 goto mount_fail_check;
2856 }
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002857
2858 if (tcon)
2859 cifs_put_tcon(tcon);
2860 else if (pSesInfo)
2861 cifs_put_smb_ses(pSesInfo);
2862
2863 cleanup_volume_info(&volume_info);
Igor Mammedov5c2503a2009-04-21 19:31:05 +04002864 referral_walks_count++;
Jeff Laytona2934c72009-12-03 08:09:41 -05002865 FreeXid(xid);
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002866 goto try_mount_again;
2867 }
Steve Frenchd036f502009-04-03 03:12:08 +00002868#else /* No DFS support, return error on mount */
2869 rc = -EOPNOTSUPP;
2870#endif
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002871 }
2872
Jeff Layton9d002df2010-10-06 19:51:11 -04002873 if (rc)
2874 goto mount_fail_check;
2875
2876 /* now, hang the tcon off of the superblock */
2877 tlink = kzalloc(sizeof *tlink, GFP_KERNEL);
2878 if (tlink == NULL) {
2879 rc = -ENOMEM;
2880 goto mount_fail_check;
2881 }
2882
2883 tlink->tl_index = pSesInfo->linux_uid;
2884 tlink->tl_tcon = tcon;
2885 tlink->tl_time = jiffies;
2886 set_bit(TCON_LINK_MASTER, &tlink->tl_flags);
2887 set_bit(TCON_LINK_IN_TREE, &tlink->tl_flags);
2888
2889 rc = radix_tree_preload(GFP_KERNEL);
2890 if (rc == -ENOMEM) {
2891 kfree(tlink);
2892 goto mount_fail_check;
2893 }
2894
2895 spin_lock(&cifs_sb->tlink_tree_lock);
2896 radix_tree_insert(&cifs_sb->tlink_tree, pSesInfo->linux_uid, tlink);
2897 radix_tree_tag_set(&cifs_sb->tlink_tree, pSesInfo->linux_uid,
2898 CIFS_TLINK_MASTER_TAG);
2899 spin_unlock(&cifs_sb->tlink_tree_lock);
2900 radix_tree_preload_end();
2901
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002902mount_fail_check:
2903 /* on error free sesinfo and tcon struct if needed */
2904 if (rc) {
2905 if (mount_data != mount_data_global)
2906 kfree(mount_data);
2907 /* If find_unc succeeded then rc == 0 so we can not end */
2908 /* up accidently freeing someone elses tcon struct */
2909 if (tcon)
2910 cifs_put_tcon(tcon);
2911 else if (pSesInfo)
2912 cifs_put_smb_ses(pSesInfo);
2913 else
2914 cifs_put_tcp_session(srvTcp);
2915 goto out;
2916 }
2917
Jeff Layton7586b762008-12-01 18:41:49 -05002918 /* volume_info->password is freed above when existing session found
Linus Torvalds1da177e2005-04-16 15:20:36 -07002919 (in which case it is not needed anymore) but when new sesion is created
2920 the password ptr is put in the new session structure (in which case the
2921 password will be freed at unmount time) */
Jeff Layton70fe7dc2007-11-16 22:21:07 +00002922out:
2923 /* zero out password before freeing */
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002924 cleanup_volume_info(&volume_info);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002925 FreeXid(xid);
2926 return rc;
2927}
2928
Linus Torvalds1da177e2005-04-16 15:20:36 -07002929int
2930CIFSTCon(unsigned int xid, struct cifsSesInfo *ses,
2931 const char *tree, struct cifsTconInfo *tcon,
2932 const struct nls_table *nls_codepage)
2933{
2934 struct smb_hdr *smb_buffer;
2935 struct smb_hdr *smb_buffer_response;
2936 TCONX_REQ *pSMB;
2937 TCONX_RSP *pSMBr;
2938 unsigned char *bcc_ptr;
2939 int rc = 0;
Jeff Laytoncc20c032009-04-30 07:16:21 -04002940 int length, bytes_left;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002941 __u16 count;
2942
2943 if (ses == NULL)
2944 return -EIO;
2945
2946 smb_buffer = cifs_buf_get();
Steve Frenchca43e3b2009-09-01 17:20:50 +00002947 if (smb_buffer == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002948 return -ENOMEM;
Steve Frenchca43e3b2009-09-01 17:20:50 +00002949
Linus Torvalds1da177e2005-04-16 15:20:36 -07002950 smb_buffer_response = smb_buffer;
2951
2952 header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX,
2953 NULL /*no tid */ , 4 /*wct */ );
Steve French1982c342005-08-17 12:38:22 -07002954
2955 smb_buffer->Mid = GetNextMid(ses->server);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002956 smb_buffer->Uid = ses->Suid;
2957 pSMB = (TCONX_REQ *) smb_buffer;
2958 pSMBr = (TCONX_RSP *) smb_buffer_response;
2959
2960 pSMB->AndXCommand = 0xFF;
2961 pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002962 bcc_ptr = &pSMB->Password[0];
Steve Frenchfb8c4b12007-07-10 01:16:18 +00002963 if ((ses->server->secMode) & SECMODE_USER) {
Steve Frencheeac8042006-01-13 21:34:58 -08002964 pSMB->PasswordLength = cpu_to_le16(1); /* minimum */
Steve French7c7b25b2006-06-01 19:20:10 +00002965 *bcc_ptr = 0; /* password is null byte */
Steve Frencheeac8042006-01-13 21:34:58 -08002966 bcc_ptr++; /* skip password */
Steve French7c7b25b2006-06-01 19:20:10 +00002967 /* already aligned so no need to do it below */
Steve Frencheeac8042006-01-13 21:34:58 -08002968 } else {
Steve French7c7b25b2006-06-01 19:20:10 +00002969 pSMB->PasswordLength = cpu_to_le16(CIFS_SESS_KEY_SIZE);
Steve Frencheeac8042006-01-13 21:34:58 -08002970 /* BB FIXME add code to fail this if NTLMv2 or Kerberos
2971 specified as required (when that support is added to
2972 the vfs in the future) as only NTLM or the much
Steve French7c7b25b2006-06-01 19:20:10 +00002973 weaker LANMAN (which we do not send by default) is accepted
Steve Frencheeac8042006-01-13 21:34:58 -08002974 by Samba (not sure whether other servers allow
2975 NTLMv2 password here) */
Steve French7c7b25b2006-06-01 19:20:10 +00002976#ifdef CONFIG_CIFS_WEAK_PW_HASH
Jeff Layton04912d62010-04-24 07:57:45 -04002977 if ((global_secflags & CIFSSEC_MAY_LANMAN) &&
Jeff Layton00e485b2008-12-05 20:41:21 -05002978 (ses->server->secType == LANMAN))
2979 calc_lanman_hash(tcon->password, ses->server->cryptKey,
Jeff Layton4e53a3f2008-12-05 20:41:21 -05002980 ses->server->secMode &
2981 SECMODE_PW_ENCRYPT ? true : false,
2982 bcc_ptr);
Steve French7c7b25b2006-06-01 19:20:10 +00002983 else
2984#endif /* CIFS_WEAK_PW_HASH */
Jeff Layton00e485b2008-12-05 20:41:21 -05002985 SMBNTencrypt(tcon->password, ses->server->cryptKey,
Steve Frencheeac8042006-01-13 21:34:58 -08002986 bcc_ptr);
2987
Steve French7c7b25b2006-06-01 19:20:10 +00002988 bcc_ptr += CIFS_SESS_KEY_SIZE;
Steve Frenchfb8c4b12007-07-10 01:16:18 +00002989 if (ses->capabilities & CAP_UNICODE) {
Steve French7c7b25b2006-06-01 19:20:10 +00002990 /* must align unicode strings */
2991 *bcc_ptr = 0; /* null byte password */
2992 bcc_ptr++;
2993 }
Steve Frencheeac8042006-01-13 21:34:58 -08002994 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002995
Steve French50c2f752007-07-13 00:33:32 +00002996 if (ses->server->secMode &
Steve Frencha878fb22006-05-30 18:04:19 +00002997 (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002998 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2999
3000 if (ses->capabilities & CAP_STATUS32) {
3001 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
3002 }
3003 if (ses->capabilities & CAP_DFS) {
3004 smb_buffer->Flags2 |= SMBFLG2_DFS;
3005 }
3006 if (ses->capabilities & CAP_UNICODE) {
3007 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
3008 length =
Steve French50c2f752007-07-13 00:33:32 +00003009 cifs_strtoUCS((__le16 *) bcc_ptr, tree,
3010 6 /* max utf8 char length in bytes */ *
Steve Frencha878fb22006-05-30 18:04:19 +00003011 (/* server len*/ + 256 /* share len */), nls_codepage);
3012 bcc_ptr += 2 * length; /* convert num 16 bit words to bytes */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003013 bcc_ptr += 2; /* skip trailing null */
3014 } else { /* ASCII */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003015 strcpy(bcc_ptr, tree);
3016 bcc_ptr += strlen(tree) + 1;
3017 }
3018 strcpy(bcc_ptr, "?????");
3019 bcc_ptr += strlen("?????");
3020 bcc_ptr += 1;
3021 count = bcc_ptr - &pSMB->Password[0];
3022 pSMB->hdr.smb_buf_length += count;
3023 pSMB->ByteCount = cpu_to_le16(count);
3024
Steve French133672e2007-11-13 22:41:37 +00003025 rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length,
3026 CIFS_STD_OP);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003027
Linus Torvalds1da177e2005-04-16 15:20:36 -07003028 /* above now done in SendReceive */
3029 if ((rc == 0) && (tcon != NULL)) {
Steve French0e0d2cf2009-05-01 05:27:32 +00003030 bool is_unicode;
3031
Linus Torvalds1da177e2005-04-16 15:20:36 -07003032 tcon->tidStatus = CifsGood;
Steve French3b795212008-11-13 19:45:32 +00003033 tcon->need_reconnect = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003034 tcon->tid = smb_buffer_response->Tid;
3035 bcc_ptr = pByteArea(smb_buffer_response);
Jeff Laytoncc20c032009-04-30 07:16:21 -04003036 bytes_left = BCC(smb_buffer_response);
3037 length = strnlen(bcc_ptr, bytes_left - 2);
Steve French0e0d2cf2009-05-01 05:27:32 +00003038 if (smb_buffer->Flags2 & SMBFLG2_UNICODE)
3039 is_unicode = true;
3040 else
3041 is_unicode = false;
3042
Jeff Laytoncc20c032009-04-30 07:16:21 -04003043
Steve French50c2f752007-07-13 00:33:32 +00003044 /* skip service field (NB: this field is always ASCII) */
Steve French7f8ed422007-09-28 22:28:55 +00003045 if (length == 3) {
3046 if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') &&
3047 (bcc_ptr[2] == 'C')) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00003048 cFYI(1, "IPC connection");
Steve French7f8ed422007-09-28 22:28:55 +00003049 tcon->ipc = 1;
3050 }
3051 } else if (length == 2) {
3052 if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) {
3053 /* the most common case */
Joe Perchesb6b38f72010-04-21 03:50:45 +00003054 cFYI(1, "disk share connection");
Steve French7f8ed422007-09-28 22:28:55 +00003055 }
3056 }
Steve French50c2f752007-07-13 00:33:32 +00003057 bcc_ptr += length + 1;
Jeff Laytoncc20c032009-04-30 07:16:21 -04003058 bytes_left -= (length + 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003059 strncpy(tcon->treeName, tree, MAX_TREE_SIZE);
Jeff Laytoncc20c032009-04-30 07:16:21 -04003060
3061 /* mostly informational -- no need to fail on error here */
Jeff Layton90a98b22009-07-20 13:40:52 -04003062 kfree(tcon->nativeFileSystem);
Steve Frenchd185cda2009-04-30 17:45:10 +00003063 tcon->nativeFileSystem = cifs_strndup_from_ucs(bcc_ptr,
Steve French0e0d2cf2009-05-01 05:27:32 +00003064 bytes_left, is_unicode,
Jeff Laytoncc20c032009-04-30 07:16:21 -04003065 nls_codepage);
3066
Joe Perchesb6b38f72010-04-21 03:50:45 +00003067 cFYI(1, "nativeFileSystem=%s", tcon->nativeFileSystem);
Jeff Laytoncc20c032009-04-30 07:16:21 -04003068
Steve Frenchfb8c4b12007-07-10 01:16:18 +00003069 if ((smb_buffer_response->WordCount == 3) ||
Steve French1a4e15a2006-10-12 21:33:51 +00003070 (smb_buffer_response->WordCount == 7))
3071 /* field is in same location */
Steve French39798772006-05-31 22:40:51 +00003072 tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport);
3073 else
3074 tcon->Flags = 0;
Joe Perchesb6b38f72010-04-21 03:50:45 +00003075 cFYI(1, "Tcon flags: 0x%x ", tcon->Flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003076 } else if ((rc == 0) && tcon == NULL) {
Steve French50c2f752007-07-13 00:33:32 +00003077 /* all we need to save for IPC$ connection */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003078 ses->ipc_tid = smb_buffer_response->Tid;
3079 }
3080
Mariusz Kozlowskia8a11d32007-10-03 16:41:24 +00003081 cifs_buf_release(smb_buffer);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003082 return rc;
3083}
3084
3085int
3086cifs_umount(struct super_block *sb, struct cifs_sb_info *cifs_sb)
3087{
Jeff Layton9d002df2010-10-06 19:51:11 -04003088 int i, ret;
Steve French50c2f752007-07-13 00:33:32 +00003089 char *tmp;
Jeff Layton9d002df2010-10-06 19:51:11 -04003090 struct tcon_link *tlink[8];
3091 unsigned long index = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003092
Jeff Layton9d002df2010-10-06 19:51:11 -04003093 do {
3094 spin_lock(&cifs_sb->tlink_tree_lock);
3095 ret = radix_tree_gang_lookup(&cifs_sb->tlink_tree,
3096 (void **)tlink, index,
3097 ARRAY_SIZE(tlink));
3098 /* increment index for next pass */
3099 if (ret > 0)
3100 index = tlink[ret - 1]->tl_index + 1;
3101 for (i = 0; i < ret; i++) {
3102 cifs_get_tlink(tlink[i]);
3103 clear_bit(TCON_LINK_IN_TREE, &tlink[i]->tl_flags);
3104 radix_tree_delete(&cifs_sb->tlink_tree,
3105 tlink[i]->tl_index);
3106 }
3107 spin_unlock(&cifs_sb->tlink_tree_lock);
Steve French50c2f752007-07-13 00:33:32 +00003108
Jeff Layton9d002df2010-10-06 19:51:11 -04003109 for (i = 0; i < ret; i++)
3110 cifs_put_tlink(tlink[i]);
3111 } while (ret != 0);
3112
Steve French2fe87f02006-09-21 07:02:52 +00003113 tmp = cifs_sb->prepath;
3114 cifs_sb->prepathlen = 0;
3115 cifs_sb->prepath = NULL;
3116 kfree(tmp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003117
Jeff Layton9d002df2010-10-06 19:51:11 -04003118 return 0;
Steve French50c2f752007-07-13 00:33:32 +00003119}
Linus Torvalds1da177e2005-04-16 15:20:36 -07003120
Jeff Layton198b5682010-04-24 07:57:48 -04003121int cifs_negotiate_protocol(unsigned int xid, struct cifsSesInfo *ses)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003122{
3123 int rc = 0;
Jeff Layton198b5682010-04-24 07:57:48 -04003124 struct TCP_Server_Info *server = ses->server;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003125
Jeff Layton198b5682010-04-24 07:57:48 -04003126 /* only send once per connect */
3127 if (server->maxBuf != 0)
3128 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003129
Jeff Layton198b5682010-04-24 07:57:48 -04003130 rc = CIFSSMBNegotiate(xid, ses);
3131 if (rc == -EAGAIN) {
3132 /* retry only once on 1st time connection */
3133 rc = CIFSSMBNegotiate(xid, ses);
3134 if (rc == -EAGAIN)
3135 rc = -EHOSTDOWN;
3136 }
3137 if (rc == 0) {
3138 spin_lock(&GlobalMid_Lock);
3139 if (server->tcpStatus != CifsExiting)
3140 server->tcpStatus = CifsGood;
3141 else
3142 rc = -EHOSTDOWN;
3143 spin_unlock(&GlobalMid_Lock);
3144
Linus Torvalds1da177e2005-04-16 15:20:36 -07003145 }
Steve French26b994f2008-08-06 05:11:33 +00003146
Jeff Layton198b5682010-04-24 07:57:48 -04003147 return rc;
3148}
Steve French26b994f2008-08-06 05:11:33 +00003149
Jeff Layton198b5682010-04-24 07:57:48 -04003150
3151int cifs_setup_session(unsigned int xid, struct cifsSesInfo *ses,
3152 struct nls_table *nls_info)
3153{
3154 int rc = 0;
3155 struct TCP_Server_Info *server = ses->server;
3156
3157 ses->flags = 0;
3158 ses->capabilities = server->capabilities;
Steve French26b994f2008-08-06 05:11:33 +00003159 if (linuxExtEnabled == 0)
Jeff Layton198b5682010-04-24 07:57:48 -04003160 ses->capabilities &= (~CAP_UNIX);
Steve French20418ac2009-04-30 16:13:32 +00003161
Joe Perchesb6b38f72010-04-21 03:50:45 +00003162 cFYI(1, "Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d",
3163 server->secMode, server->capabilities, server->timeAdj);
Jeff Laytoncb7691b2008-08-18 15:41:05 -04003164
Jeff Layton198b5682010-04-24 07:57:48 -04003165 rc = CIFS_SessSetup(xid, ses, nls_info);
Steve French26b994f2008-08-06 05:11:33 +00003166 if (rc) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00003167 cERROR(1, "Send error in SessSetup = %d", rc);
Steve French26b994f2008-08-06 05:11:33 +00003168 } else {
Joe Perchesb6b38f72010-04-21 03:50:45 +00003169 cFYI(1, "CIFS Session Established successfully");
Steve French20418ac2009-04-30 16:13:32 +00003170 spin_lock(&GlobalMid_Lock);
Jeff Layton198b5682010-04-24 07:57:48 -04003171 ses->status = CifsGood;
3172 ses->need_reconnect = false;
Steve French20418ac2009-04-30 16:13:32 +00003173 spin_unlock(&GlobalMid_Lock);
Steve French26b994f2008-08-06 05:11:33 +00003174 }
3175
Linus Torvalds1da177e2005-04-16 15:20:36 -07003176 return rc;
3177}
3178
Jeff Layton9d002df2010-10-06 19:51:11 -04003179struct cifsTconInfo *
3180cifs_construct_tcon(struct cifs_sb_info *cifs_sb, uid_t fsuid)
3181{
3182 struct cifsTconInfo *master_tcon = cifs_sb_master_tcon(cifs_sb);
3183 struct cifsSesInfo *ses;
3184 struct cifsTconInfo *tcon = NULL;
3185 struct smb_vol *vol_info;
3186 char username[MAX_USERNAME_SIZE + 1];
3187
3188 vol_info = kzalloc(sizeof(*vol_info), GFP_KERNEL);
3189 if (vol_info == NULL) {
3190 tcon = ERR_PTR(-ENOMEM);
3191 goto out;
3192 }
3193
3194 snprintf(username, MAX_USERNAME_SIZE, "krb50x%x", fsuid);
3195 vol_info->username = username;
3196 vol_info->local_nls = cifs_sb->local_nls;
3197 vol_info->linux_uid = fsuid;
3198 vol_info->cred_uid = fsuid;
3199 vol_info->UNC = master_tcon->treeName;
3200 vol_info->retry = master_tcon->retry;
3201 vol_info->nocase = master_tcon->nocase;
3202 vol_info->local_lease = master_tcon->local_lease;
3203 vol_info->no_linux_ext = !master_tcon->unix_ext;
3204
3205 /* FIXME: allow for other secFlg settings */
3206 vol_info->secFlg = CIFSSEC_MUST_KRB5;
3207
3208 /* get a reference for the same TCP session */
3209 write_lock(&cifs_tcp_ses_lock);
3210 ++master_tcon->ses->server->srv_count;
3211 write_unlock(&cifs_tcp_ses_lock);
3212
3213 ses = cifs_get_smb_ses(master_tcon->ses->server, vol_info);
3214 if (IS_ERR(ses)) {
3215 tcon = (struct cifsTconInfo *)ses;
3216 cifs_put_tcp_session(master_tcon->ses->server);
3217 goto out;
3218 }
3219
3220 tcon = cifs_get_tcon(ses, vol_info);
3221 if (IS_ERR(tcon)) {
3222 cifs_put_smb_ses(ses);
3223 goto out;
3224 }
3225
3226 if (ses->capabilities & CAP_UNIX)
3227 reset_cifs_unix_caps(0, tcon, NULL, vol_info);
3228out:
3229 kfree(vol_info);
3230
3231 return tcon;
3232}
3233
3234static struct tcon_link *
3235cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb)
3236{
3237 struct tcon_link *tlink;
3238 unsigned int ret;
3239
3240 spin_lock(&cifs_sb->tlink_tree_lock);
3241 ret = radix_tree_gang_lookup_tag(&cifs_sb->tlink_tree, (void **)&tlink,
3242 0, 1, CIFS_TLINK_MASTER_TAG);
3243 spin_unlock(&cifs_sb->tlink_tree_lock);
3244
3245 /* the master tcon should always be present */
3246 if (ret == 0)
3247 BUG();
3248
3249 return tlink;
3250}
3251
3252struct cifsTconInfo *
3253cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb)
3254{
3255 return tlink_tcon(cifs_sb_master_tlink(cifs_sb));
3256}
3257
3258static int
3259cifs_sb_tcon_pending_wait(void *unused)
3260{
3261 schedule();
3262 return signal_pending(current) ? -ERESTARTSYS : 0;
3263}
3264
3265/*
3266 * Find or construct an appropriate tcon given a cifs_sb and the fsuid of the
3267 * current task.
3268 *
3269 * If the superblock doesn't refer to a multiuser mount, then just return
3270 * the master tcon for the mount.
3271 *
3272 * First, search the radix tree for an existing tcon for this fsuid. If one
3273 * exists, then check to see if it's pending construction. If it is then wait
3274 * for construction to complete. Once it's no longer pending, check to see if
3275 * it failed and either return an error or retry construction, depending on
3276 * the timeout.
3277 *
3278 * If one doesn't exist then insert a new tcon_link struct into the tree and
3279 * try to construct a new one.
3280 */
3281struct tcon_link *
3282cifs_sb_tlink(struct cifs_sb_info *cifs_sb)
3283{
3284 int ret;
3285 unsigned long fsuid = (unsigned long) current_fsuid();
3286 struct tcon_link *tlink, *newtlink;
3287
3288 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER))
3289 return cifs_get_tlink(cifs_sb_master_tlink(cifs_sb));
3290
3291 spin_lock(&cifs_sb->tlink_tree_lock);
3292 tlink = radix_tree_lookup(&cifs_sb->tlink_tree, fsuid);
3293 if (tlink)
3294 cifs_get_tlink(tlink);
3295 spin_unlock(&cifs_sb->tlink_tree_lock);
3296
3297 if (tlink == NULL) {
3298 newtlink = kzalloc(sizeof(*tlink), GFP_KERNEL);
3299 if (newtlink == NULL)
3300 return ERR_PTR(-ENOMEM);
3301 newtlink->tl_index = fsuid;
3302 newtlink->tl_tcon = ERR_PTR(-EACCES);
3303 set_bit(TCON_LINK_PENDING, &newtlink->tl_flags);
3304 set_bit(TCON_LINK_IN_TREE, &newtlink->tl_flags);
3305 cifs_get_tlink(newtlink);
3306
3307 ret = radix_tree_preload(GFP_KERNEL);
3308 if (ret != 0) {
3309 kfree(newtlink);
3310 return ERR_PTR(ret);
3311 }
3312
3313 spin_lock(&cifs_sb->tlink_tree_lock);
3314 /* was one inserted after previous search? */
3315 tlink = radix_tree_lookup(&cifs_sb->tlink_tree, fsuid);
3316 if (tlink) {
3317 cifs_get_tlink(tlink);
3318 spin_unlock(&cifs_sb->tlink_tree_lock);
3319 radix_tree_preload_end();
3320 kfree(newtlink);
3321 goto wait_for_construction;
3322 }
3323 ret = radix_tree_insert(&cifs_sb->tlink_tree, fsuid, newtlink);
3324 spin_unlock(&cifs_sb->tlink_tree_lock);
3325 radix_tree_preload_end();
3326 if (ret) {
3327 kfree(newtlink);
3328 return ERR_PTR(ret);
3329 }
3330 tlink = newtlink;
3331 } else {
3332wait_for_construction:
3333 ret = wait_on_bit(&tlink->tl_flags, TCON_LINK_PENDING,
3334 cifs_sb_tcon_pending_wait,
3335 TASK_INTERRUPTIBLE);
3336 if (ret) {
3337 cifs_put_tlink(tlink);
3338 return ERR_PTR(ret);
3339 }
3340
3341 /* if it's good, return it */
3342 if (!IS_ERR(tlink->tl_tcon))
3343 return tlink;
3344
3345 /* return error if we tried this already recently */
3346 if (time_before(jiffies, tlink->tl_time + TLINK_ERROR_EXPIRE)) {
3347 cifs_put_tlink(tlink);
3348 return ERR_PTR(-EACCES);
3349 }
3350
3351 if (test_and_set_bit(TCON_LINK_PENDING, &tlink->tl_flags))
3352 goto wait_for_construction;
3353 }
3354
3355 tlink->tl_tcon = cifs_construct_tcon(cifs_sb, fsuid);
3356 clear_bit(TCON_LINK_PENDING, &tlink->tl_flags);
3357 wake_up_bit(&tlink->tl_flags, TCON_LINK_PENDING);
3358
3359 if (IS_ERR(tlink->tl_tcon)) {
3360 cifs_put_tlink(tlink);
3361 return ERR_PTR(-EACCES);
3362 }
3363
3364 return tlink;
3365}