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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"
Steve Frencha2653eb2005-11-10 15:33:38 -080050#include "cn_cifs.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 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070069 uid_t linux_uid;
70 gid_t linux_gid;
71 mode_t file_mode;
72 mode_t dir_mode;
Steve French189acaa2006-06-23 02:33:48 +000073 unsigned secFlg;
Steve French4b18f2a2008-04-29 00:06:05 +000074 bool retry:1;
75 bool intr:1;
76 bool setuids:1;
77 bool override_uid:1;
78 bool override_gid:1;
Jeff Laytond0a9c072008-05-12 22:23:49 +000079 bool dynperm:1;
Steve French4b18f2a2008-04-29 00:06:05 +000080 bool noperm:1;
81 bool no_psx_acl:1; /* set if posix acl support should be disabled */
82 bool cifs_acl:1;
83 bool no_xattr:1; /* set if xattr (EA) support should be disabled*/
84 bool server_ino:1; /* use inode numbers from server ie UniqueId */
85 bool direct_io:1;
Steve French95b1cb92008-05-15 16:44:38 +000086 bool remap:1; /* set to remap seven reserved chars in filenames */
87 bool posix_paths:1; /* unset to not ask for posix pathnames. */
Steve French4b18f2a2008-04-29 00:06:05 +000088 bool no_linux_ext:1;
89 bool sfu_emul:1;
Steve French95b1cb92008-05-15 16:44:38 +000090 bool nullauth:1; /* attempt to authenticate with null user */
91 bool nocase:1; /* request case insensitive filenames */
92 bool nobrl:1; /* disable sending byte range locks to srv */
Steve French13a6e422008-12-02 17:24:33 +000093 bool mand_lock:1; /* send mandatory not posix byte range lock reqs */
Steve French95b1cb92008-05-15 16:44:38 +000094 bool seal:1; /* request transport encryption on share */
Steve French84210e92008-10-23 04:42:37 +000095 bool nodfs:1; /* Do not request DFS, even if available */
96 bool local_lease:1; /* check leases only on local system, not remote */
Steve Frenchedf1ae42008-10-29 00:47:57 +000097 bool noblocksnd:1;
98 bool noautotune:1;
Steve Frenchbe652442009-02-23 15:21:59 +000099 bool nostrictsync:1; /* do not force expensive SMBflush on every sync */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100 unsigned int rsize;
101 unsigned int wsize;
Steve French6a5fa2362010-01-01 01:28:43 +0000102 bool sockopt_tcp_nodelay:1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103 unsigned short int port;
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000104 char *prepath;
Jeff Laytona5fc4ce2010-04-24 07:57:42 -0400105 struct nls_table *local_nls;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106};
107
Jeff Laytonbcf4b102008-12-01 18:42:15 -0500108static int ipv4_connect(struct TCP_Server_Info *server);
Jeff Laytond5c56052008-12-01 18:42:33 -0500109static int ipv6_connect(struct TCP_Server_Info *server);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110
Jeff Laytond5c56052008-12-01 18:42:33 -0500111/*
112 * cifs tcp session reconnection
113 *
114 * mark tcp session as reconnecting so temporarily locked
115 * mark all smb sessions as reconnecting for tcp session
116 * reconnect tcp session
117 * wake up waiters on reconnection? - (not needed currently)
118 */
Steve French2cd646a2006-09-28 19:43:08 +0000119static int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120cifs_reconnect(struct TCP_Server_Info *server)
121{
122 int rc = 0;
Jeff Laytonf1987b42008-11-15 11:12:47 -0500123 struct list_head *tmp, *tmp2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124 struct cifsSesInfo *ses;
125 struct cifsTconInfo *tcon;
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000126 struct mid_q_entry *mid_entry;
Steve French50c2f752007-07-13 00:33:32 +0000127
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128 spin_lock(&GlobalMid_Lock);
Jeff Layton469ee612008-10-16 18:46:39 +0000129 if (server->tcpStatus == CifsExiting) {
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000130 /* the demux thread will exit normally
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131 next time through the loop */
132 spin_unlock(&GlobalMid_Lock);
133 return rc;
134 } else
135 server->tcpStatus = CifsNeedReconnect;
136 spin_unlock(&GlobalMid_Lock);
137 server->maxBuf = 0;
138
Joe Perchesb6b38f72010-04-21 03:50:45 +0000139 cFYI(1, "Reconnecting tcp session");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140
141 /* before reconnecting the tcp session, mark the smb session (uid)
142 and the tid bad so they are not used until reconnected */
Jeff Layton14fbf502008-11-14 13:53:46 -0500143 read_lock(&cifs_tcp_ses_lock);
144 list_for_each(tmp, &server->smb_ses_list) {
145 ses = list_entry(tmp, struct cifsSesInfo, smb_ses_list);
146 ses->need_reconnect = true;
147 ses->ipc_tid = 0;
Jeff Laytonf1987b42008-11-15 11:12:47 -0500148 list_for_each(tmp2, &ses->tcon_list) {
149 tcon = list_entry(tmp2, struct cifsTconInfo, tcon_list);
150 tcon->need_reconnect = true;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152 }
Jeff Layton14fbf502008-11-14 13:53:46 -0500153 read_unlock(&cifs_tcp_ses_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154 /* do not want to be sending data on a socket we are freeing */
Jeff Layton72ca5452008-12-01 07:09:36 -0500155 mutex_lock(&server->srv_mutex);
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000156 if (server->ssocket) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000157 cFYI(1, "State: 0x%x Flags: 0x%lx", server->ssocket->state,
158 server->ssocket->flags);
Trond Myklebust91cf45f2007-11-12 18:10:39 -0800159 kernel_sock_shutdown(server->ssocket, SHUT_WR);
Joe Perchesb6b38f72010-04-21 03:50:45 +0000160 cFYI(1, "Post shutdown state: 0x%x Flags: 0x%lx",
Steve French467a8f82007-06-27 22:41:32 +0000161 server->ssocket->state,
Joe Perchesb6b38f72010-04-21 03:50:45 +0000162 server->ssocket->flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163 sock_release(server->ssocket);
164 server->ssocket = NULL;
165 }
166
167 spin_lock(&GlobalMid_Lock);
168 list_for_each(tmp, &server->pending_mid_q) {
169 mid_entry = list_entry(tmp, struct
170 mid_q_entry,
171 qhead);
Steve Frenchad8b15f2008-08-08 21:10:16 +0000172 if (mid_entry->midState == MID_REQUEST_SUBMITTED) {
Steve French09d1db52005-04-28 22:41:08 -0700173 /* Mark other intransit requests as needing
174 retry so we do not immediately mark the
175 session bad again (ie after we reconnect
176 below) as they timeout too */
Steve Frenchad8b15f2008-08-08 21:10:16 +0000177 mid_entry->midState = MID_RETRY_NEEDED;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178 }
179 }
180 spin_unlock(&GlobalMid_Lock);
Jeff Layton72ca5452008-12-01 07:09:36 -0500181 mutex_unlock(&server->srv_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182
Jeff Layton469ee612008-10-16 18:46:39 +0000183 while ((server->tcpStatus != CifsExiting) &&
184 (server->tcpStatus != CifsGood)) {
Steve French6c3d8902006-07-31 22:46:20 +0000185 try_to_freeze();
Jeff Laytonbcf4b102008-12-01 18:42:15 -0500186 if (server->addr.sockAddr6.sin6_family == AF_INET6)
Jeff Laytond5c56052008-12-01 18:42:33 -0500187 rc = ipv6_connect(server);
Jeff Laytonbcf4b102008-12-01 18:42:15 -0500188 else
189 rc = ipv4_connect(server);
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000190 if (rc) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000191 cFYI(1, "reconnect error %d", rc);
Steve French0cb766a2005-04-28 22:41:11 -0700192 msleep(3000);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193 } else {
194 atomic_inc(&tcpSesReconnectCount);
195 spin_lock(&GlobalMid_Lock);
Jeff Layton469ee612008-10-16 18:46:39 +0000196 if (server->tcpStatus != CifsExiting)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197 server->tcpStatus = CifsGood;
Steve Frenchad009ac2005-04-28 22:41:05 -0700198 server->sequence_number = 0;
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000199 spin_unlock(&GlobalMid_Lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200 /* atomic_set(&server->inFlight,0);*/
201 wake_up(&server->response_q);
202 }
203 }
204 return rc;
205}
206
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000207/*
Steve Frenche4eb2952005-04-28 22:41:09 -0700208 return codes:
209 0 not a transact2, or all data present
210 >0 transact2 with that much data missing
211 -EINVAL = invalid transact2
212
213 */
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000214static int check2ndT2(struct smb_hdr *pSMB, unsigned int maxBufSize)
Steve Frenche4eb2952005-04-28 22:41:09 -0700215{
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000216 struct smb_t2_rsp *pSMBt;
217 int total_data_size;
Steve Frenche4eb2952005-04-28 22:41:09 -0700218 int data_in_this_rsp;
219 int remaining;
220
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000221 if (pSMB->Command != SMB_COM_TRANSACTION2)
Steve Frenche4eb2952005-04-28 22:41:09 -0700222 return 0;
223
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000224 /* check for plausible wct, bcc and t2 data and parm sizes */
225 /* check for parm and data offset going beyond end of smb */
226 if (pSMB->WordCount != 10) { /* coalesce_t2 depends on this */
Joe Perchesb6b38f72010-04-21 03:50:45 +0000227 cFYI(1, "invalid transact2 word count");
Steve Frenche4eb2952005-04-28 22:41:09 -0700228 return -EINVAL;
229 }
230
231 pSMBt = (struct smb_t2_rsp *)pSMB;
232
233 total_data_size = le16_to_cpu(pSMBt->t2_rsp.TotalDataCount);
234 data_in_this_rsp = le16_to_cpu(pSMBt->t2_rsp.DataCount);
235
236 remaining = total_data_size - data_in_this_rsp;
237
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000238 if (remaining == 0)
Steve Frenche4eb2952005-04-28 22:41:09 -0700239 return 0;
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000240 else if (remaining < 0) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000241 cFYI(1, "total data %d smaller than data in frame %d",
242 total_data_size, data_in_this_rsp);
Steve Frenche4eb2952005-04-28 22:41:09 -0700243 return -EINVAL;
244 } else {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000245 cFYI(1, "missing %d bytes from transact2, check next response",
246 remaining);
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000247 if (total_data_size > maxBufSize) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000248 cERROR(1, "TotalDataSize %d is over maximum buffer %d",
249 total_data_size, maxBufSize);
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000250 return -EINVAL;
Steve Frenche4eb2952005-04-28 22:41:09 -0700251 }
252 return remaining;
253 }
254}
255
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000256static int coalesce_t2(struct smb_hdr *psecond, struct smb_hdr *pTargetSMB)
Steve Frenche4eb2952005-04-28 22:41:09 -0700257{
258 struct smb_t2_rsp *pSMB2 = (struct smb_t2_rsp *)psecond;
259 struct smb_t2_rsp *pSMBt = (struct smb_t2_rsp *)pTargetSMB;
260 int total_data_size;
261 int total_in_buf;
262 int remaining;
263 int total_in_buf2;
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000264 char *data_area_of_target;
265 char *data_area_of_buf2;
Steve Frenche4eb2952005-04-28 22:41:09 -0700266 __u16 byte_count;
267
268 total_data_size = le16_to_cpu(pSMBt->t2_rsp.TotalDataCount);
269
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000270 if (total_data_size != le16_to_cpu(pSMB2->t2_rsp.TotalDataCount)) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000271 cFYI(1, "total data size of primary and secondary t2 differ");
Steve Frenche4eb2952005-04-28 22:41:09 -0700272 }
273
274 total_in_buf = le16_to_cpu(pSMBt->t2_rsp.DataCount);
275
276 remaining = total_data_size - total_in_buf;
Steve French50c2f752007-07-13 00:33:32 +0000277
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000278 if (remaining < 0)
Steve Frenche4eb2952005-04-28 22:41:09 -0700279 return -EINVAL;
280
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000281 if (remaining == 0) /* nothing to do, ignore */
Steve Frenche4eb2952005-04-28 22:41:09 -0700282 return 0;
Steve French50c2f752007-07-13 00:33:32 +0000283
Steve Frenche4eb2952005-04-28 22:41:09 -0700284 total_in_buf2 = le16_to_cpu(pSMB2->t2_rsp.DataCount);
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000285 if (remaining < total_in_buf2) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000286 cFYI(1, "transact2 2nd response contains too much data");
Steve Frenche4eb2952005-04-28 22:41:09 -0700287 }
288
289 /* find end of first SMB data area */
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000290 data_area_of_target = (char *)&pSMBt->hdr.Protocol +
Steve Frenche4eb2952005-04-28 22:41:09 -0700291 le16_to_cpu(pSMBt->t2_rsp.DataOffset);
292 /* validate target area */
293
294 data_area_of_buf2 = (char *) &pSMB2->hdr.Protocol +
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000295 le16_to_cpu(pSMB2->t2_rsp.DataOffset);
Steve Frenche4eb2952005-04-28 22:41:09 -0700296
297 data_area_of_target += total_in_buf;
298
299 /* copy second buffer into end of first buffer */
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000300 memcpy(data_area_of_target, data_area_of_buf2, total_in_buf2);
Steve Frenche4eb2952005-04-28 22:41:09 -0700301 total_in_buf += total_in_buf2;
302 pSMBt->t2_rsp.DataCount = cpu_to_le16(total_in_buf);
303 byte_count = le16_to_cpu(BCC_LE(pTargetSMB));
304 byte_count += total_in_buf2;
305 BCC_LE(pTargetSMB) = cpu_to_le16(byte_count);
306
Steve French70ca7342005-09-22 16:32:06 -0700307 byte_count = pTargetSMB->smb_buf_length;
Steve Frenche4eb2952005-04-28 22:41:09 -0700308 byte_count += total_in_buf2;
309
310 /* BB also add check that we are not beyond maximum buffer size */
Steve French50c2f752007-07-13 00:33:32 +0000311
Steve French70ca7342005-09-22 16:32:06 -0700312 pTargetSMB->smb_buf_length = byte_count;
Steve Frenche4eb2952005-04-28 22:41:09 -0700313
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000314 if (remaining == total_in_buf2) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000315 cFYI(1, "found the last secondary response");
Steve Frenche4eb2952005-04-28 22:41:09 -0700316 return 0; /* we are done */
317 } else /* more responses to go */
318 return 1;
319
320}
321
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322static int
323cifs_demultiplex_thread(struct TCP_Server_Info *server)
324{
325 int length;
326 unsigned int pdu_length, total_read;
327 struct smb_hdr *smb_buffer = NULL;
Steve Frenchb8643e12005-04-28 22:41:07 -0700328 struct smb_hdr *bigbuf = NULL;
329 struct smb_hdr *smallbuf = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330 struct msghdr smb_msg;
331 struct kvec iov;
332 struct socket *csocket = server->ssocket;
333 struct list_head *tmp;
334 struct cifsSesInfo *ses;
335 struct task_struct *task_to_wake = NULL;
336 struct mid_q_entry *mid_entry;
Steve French70ca7342005-09-22 16:32:06 -0700337 char temp;
Steve French4b18f2a2008-04-29 00:06:05 +0000338 bool isLargeBuf = false;
339 bool isMultiRsp;
Steve Frenche4eb2952005-04-28 22:41:09 -0700340 int reconnect;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342 current->flags |= PF_MEMALLOC;
Joe Perchesb6b38f72010-04-21 03:50:45 +0000343 cFYI(1, "Demultiplex PID: %d", task_pid_nr(current));
Jeff Layton93d0ec82008-08-02 08:00:48 -0400344
345 length = atomic_inc_return(&tcpSesAllocCount);
346 if (length > 1)
Steve French26f57362007-08-30 22:09:15 +0000347 mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
348 GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349
Rafael J. Wysocki83144182007-07-17 04:03:35 -0700350 set_freezable();
Jeff Layton469ee612008-10-16 18:46:39 +0000351 while (server->tcpStatus != CifsExiting) {
Steve Frenchede13272005-08-30 20:10:14 -0700352 if (try_to_freeze())
353 continue;
Steve Frenchb8643e12005-04-28 22:41:07 -0700354 if (bigbuf == NULL) {
355 bigbuf = cifs_buf_get();
Pavel Machek0fd1ffe2006-06-13 21:31:39 +0000356 if (!bigbuf) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000357 cERROR(1, "No memory for large SMB response");
Steve Frenchb8643e12005-04-28 22:41:07 -0700358 msleep(3000);
359 /* retry will check if exiting */
360 continue;
361 }
Pavel Machek0fd1ffe2006-06-13 21:31:39 +0000362 } else if (isLargeBuf) {
363 /* we are reusing a dirty large buf, clear its start */
Steve French26f57362007-08-30 22:09:15 +0000364 memset(bigbuf, 0, sizeof(struct smb_hdr));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365 }
Steve Frenchb8643e12005-04-28 22:41:07 -0700366
367 if (smallbuf == NULL) {
368 smallbuf = cifs_small_buf_get();
Pavel Machek0fd1ffe2006-06-13 21:31:39 +0000369 if (!smallbuf) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000370 cERROR(1, "No memory for SMB response");
Steve Frenchb8643e12005-04-28 22:41:07 -0700371 msleep(1000);
372 /* retry will check if exiting */
373 continue;
374 }
375 /* beginning of smb buffer is cleared in our buf_get */
376 } else /* if existing small buf clear beginning */
Steve French26f57362007-08-30 22:09:15 +0000377 memset(smallbuf, 0, sizeof(struct smb_hdr));
Steve Frenchb8643e12005-04-28 22:41:07 -0700378
Steve French4b18f2a2008-04-29 00:06:05 +0000379 isLargeBuf = false;
380 isMultiRsp = false;
Steve Frenchb8643e12005-04-28 22:41:07 -0700381 smb_buffer = smallbuf;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382 iov.iov_base = smb_buffer;
383 iov.iov_len = 4;
384 smb_msg.msg_control = NULL;
385 smb_msg.msg_controllen = 0;
Steve Frenchf01d5e12007-08-30 21:13:31 +0000386 pdu_length = 4; /* enough to get RFC1001 header */
387incomplete_rcv:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388 length =
389 kernel_recvmsg(csocket, &smb_msg,
Steve Frenchf01d5e12007-08-30 21:13:31 +0000390 &iov, 1, pdu_length, 0 /* BB other flags? */);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391
Jeff Layton469ee612008-10-16 18:46:39 +0000392 if (server->tcpStatus == CifsExiting) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393 break;
394 } else if (server->tcpStatus == CifsNeedReconnect) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000395 cFYI(1, "Reconnect after server stopped responding");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396 cifs_reconnect(server);
Joe Perchesb6b38f72010-04-21 03:50:45 +0000397 cFYI(1, "call to reconnect done");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700398 csocket = server->ssocket;
399 continue;
400 } else if ((length == -ERESTARTSYS) || (length == -EAGAIN)) {
Steve Frenchb8643e12005-04-28 22:41:07 -0700401 msleep(1); /* minimum sleep to prevent looping
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402 allowing socket to clear and app threads to set
403 tcpStatus CifsNeedReconnect if server hung */
Steve Frenchc527c8a2008-11-03 20:46:21 +0000404 if (pdu_length < 4) {
405 iov.iov_base = (4 - pdu_length) +
406 (char *)smb_buffer;
407 iov.iov_len = pdu_length;
408 smb_msg.msg_control = NULL;
409 smb_msg.msg_controllen = 0;
Steve Frenchc18c7322007-10-17 18:01:11 +0000410 goto incomplete_rcv;
Steve Frenchc527c8a2008-11-03 20:46:21 +0000411 } else
Steve Frenchc18c7322007-10-17 18:01:11 +0000412 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413 } else if (length <= 0) {
Pavel Machek0fd1ffe2006-06-13 21:31:39 +0000414 if (server->tcpStatus == CifsNew) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000415 cFYI(1, "tcp session abend after SMBnegprot");
Steve French09d1db52005-04-28 22:41:08 -0700416 /* some servers kill the TCP session rather than
417 returning an SMB negprot error, in which
418 case reconnecting here is not going to help,
419 and so simply return error to mount */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420 break;
421 }
Pavel Machek0fd1ffe2006-06-13 21:31:39 +0000422 if (!try_to_freeze() && (length == -EINTR)) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000423 cFYI(1, "cifsd thread killed");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424 break;
425 }
Joe Perchesb6b38f72010-04-21 03:50:45 +0000426 cFYI(1, "Reconnect after unexpected peek error %d",
427 length);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428 cifs_reconnect(server);
429 csocket = server->ssocket;
430 wake_up(&server->response_q);
431 continue;
Petr Tesarik2a974682007-11-20 02:24:08 +0000432 } else if (length < pdu_length) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000433 cFYI(1, "requested %d bytes but only got %d bytes",
434 pdu_length, length);
Steve Frenchf01d5e12007-08-30 21:13:31 +0000435 pdu_length -= length;
Steve Frenchf01d5e12007-08-30 21:13:31 +0000436 msleep(1);
437 goto incomplete_rcv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438 }
Steve French67010fb2005-04-28 22:41:09 -0700439
Steve French70ca7342005-09-22 16:32:06 -0700440 /* The right amount was read from socket - 4 bytes */
441 /* so we can now interpret the length field */
Steve French46810cb2005-04-28 22:41:09 -0700442
Steve French70ca7342005-09-22 16:32:06 -0700443 /* the first byte big endian of the length field,
444 is actually not part of the length but the type
445 with the most common, zero, as regular data */
446 temp = *((char *) smb_buffer);
447
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000448 /* Note that FC 1001 length is big endian on the wire,
Steve French70ca7342005-09-22 16:32:06 -0700449 but we convert it here so it is always manipulated
450 as host byte order */
Harvey Harrison5ca33c62008-07-23 17:45:58 -0700451 pdu_length = be32_to_cpu((__force __be32)smb_buffer->smb_buf_length);
Steve French70ca7342005-09-22 16:32:06 -0700452 smb_buffer->smb_buf_length = pdu_length;
Steve French46810cb2005-04-28 22:41:09 -0700453
Joe Perchesb6b38f72010-04-21 03:50:45 +0000454 cFYI(1, "rfc1002 length 0x%x", pdu_length+4);
Steve French70ca7342005-09-22 16:32:06 -0700455
456 if (temp == (char) RFC1002_SESSION_KEEP_ALIVE) {
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000457 continue;
Steve French70ca7342005-09-22 16:32:06 -0700458 } else if (temp == (char)RFC1002_POSITIVE_SESSION_RESPONSE) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000459 cFYI(1, "Good RFC 1002 session rsp");
Steve Frenche4eb2952005-04-28 22:41:09 -0700460 continue;
Steve French70ca7342005-09-22 16:32:06 -0700461 } else if (temp == (char)RFC1002_NEGATIVE_SESSION_RESPONSE) {
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000462 /* we get this from Windows 98 instead of
Steve French46810cb2005-04-28 22:41:09 -0700463 an error on SMB negprot response */
Joe Perchesb6b38f72010-04-21 03:50:45 +0000464 cFYI(1, "Negative RFC1002 Session Response Error 0x%x)",
465 pdu_length);
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000466 if (server->tcpStatus == CifsNew) {
467 /* if nack on negprot (rather than
Steve French46810cb2005-04-28 22:41:09 -0700468 ret of smb negprot error) reconnecting
469 not going to help, ret error to mount */
470 break;
471 } else {
472 /* give server a second to
473 clean up before reconnect attempt */
474 msleep(1000);
475 /* always try 445 first on reconnect
476 since we get NACK on some if we ever
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000477 connected to port 139 (the NACK is
Steve French46810cb2005-04-28 22:41:09 -0700478 since we do not begin with RFC1001
479 session initialize frame) */
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000480 server->addr.sockAddr.sin_port =
Steve French46810cb2005-04-28 22:41:09 -0700481 htons(CIFS_PORT);
482 cifs_reconnect(server);
483 csocket = server->ssocket;
484 wake_up(&server->response_q);
485 continue;
486 }
Steve French70ca7342005-09-22 16:32:06 -0700487 } else if (temp != (char) 0) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000488 cERROR(1, "Unknown RFC 1002 frame");
Steve French70ca7342005-09-22 16:32:06 -0700489 cifs_dump_mem(" Received Data: ", (char *)smb_buffer,
490 length);
Steve French46810cb2005-04-28 22:41:09 -0700491 cifs_reconnect(server);
492 csocket = server->ssocket;
493 continue;
Steve Frenche4eb2952005-04-28 22:41:09 -0700494 }
495
496 /* else we have an SMB response */
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000497 if ((pdu_length > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) ||
Steve French26f57362007-08-30 22:09:15 +0000498 (pdu_length < sizeof(struct smb_hdr) - 1 - 4)) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000499 cERROR(1, "Invalid size SMB length %d pdu_length %d",
500 length, pdu_length+4);
Steve Frenche4eb2952005-04-28 22:41:09 -0700501 cifs_reconnect(server);
502 csocket = server->ssocket;
503 wake_up(&server->response_q);
504 continue;
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000505 }
Steve Frenche4eb2952005-04-28 22:41:09 -0700506
507 /* else length ok */
508 reconnect = 0;
509
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000510 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) {
Steve French4b18f2a2008-04-29 00:06:05 +0000511 isLargeBuf = true;
Steve Frenche4eb2952005-04-28 22:41:09 -0700512 memcpy(bigbuf, smallbuf, 4);
513 smb_buffer = bigbuf;
514 }
515 length = 0;
516 iov.iov_base = 4 + (char *)smb_buffer;
517 iov.iov_len = pdu_length;
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000518 for (total_read = 0; total_read < pdu_length;
Steve Frenche4eb2952005-04-28 22:41:09 -0700519 total_read += length) {
520 length = kernel_recvmsg(csocket, &smb_msg, &iov, 1,
521 pdu_length - total_read, 0);
Jeff Layton469ee612008-10-16 18:46:39 +0000522 if ((server->tcpStatus == CifsExiting) ||
Steve Frenche4eb2952005-04-28 22:41:09 -0700523 (length == -EINTR)) {
524 /* then will exit */
525 reconnect = 2;
526 break;
527 } else if (server->tcpStatus == CifsNeedReconnect) {
Steve French46810cb2005-04-28 22:41:09 -0700528 cifs_reconnect(server);
529 csocket = server->ssocket;
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000530 /* Reconnect wakes up rspns q */
Steve Frenche4eb2952005-04-28 22:41:09 -0700531 /* Now we will reread sock */
532 reconnect = 1;
533 break;
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000534 } else if ((length == -ERESTARTSYS) ||
Steve Frenche4eb2952005-04-28 22:41:09 -0700535 (length == -EAGAIN)) {
536 msleep(1); /* minimum sleep to prevent looping,
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000537 allowing socket to clear and app
Steve Frenche4eb2952005-04-28 22:41:09 -0700538 threads to set tcpStatus
539 CifsNeedReconnect if server hung*/
Steve Frenchc18c7322007-10-17 18:01:11 +0000540 length = 0;
Steve French46810cb2005-04-28 22:41:09 -0700541 continue;
Steve Frenche4eb2952005-04-28 22:41:09 -0700542 } else if (length <= 0) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000543 cERROR(1, "Received no data, expecting %d",
544 pdu_length - total_read);
Steve Frenche4eb2952005-04-28 22:41:09 -0700545 cifs_reconnect(server);
546 csocket = server->ssocket;
547 reconnect = 1;
548 break;
Steve French46810cb2005-04-28 22:41:09 -0700549 }
550 }
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000551 if (reconnect == 2)
Steve Frenche4eb2952005-04-28 22:41:09 -0700552 break;
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000553 else if (reconnect == 1)
Steve Frenche4eb2952005-04-28 22:41:09 -0700554 continue;
555
556 length += 4; /* account for rfc1002 hdr */
Steve French50c2f752007-07-13 00:33:32 +0000557
Steve Frenche4eb2952005-04-28 22:41:09 -0700558
559 dump_smb(smb_buffer, length);
Steve French184ed212006-02-24 06:15:11 +0000560 if (checkSMB(smb_buffer, smb_buffer->Mid, total_read+4)) {
Steve Frenchb387eae2005-10-10 14:21:15 -0700561 cifs_dump_mem("Bad SMB: ", smb_buffer, 48);
Steve Frenche4eb2952005-04-28 22:41:09 -0700562 continue;
563 }
564
565
566 task_to_wake = NULL;
567 spin_lock(&GlobalMid_Lock);
568 list_for_each(tmp, &server->pending_mid_q) {
569 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
570
Steve French50c2f752007-07-13 00:33:32 +0000571 if ((mid_entry->mid == smb_buffer->Mid) &&
Steve Frenche4eb2952005-04-28 22:41:09 -0700572 (mid_entry->midState == MID_REQUEST_SUBMITTED) &&
573 (mid_entry->command == smb_buffer->Command)) {
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000574 if (check2ndT2(smb_buffer,server->maxBuf) > 0) {
Steve Frenche4eb2952005-04-28 22:41:09 -0700575 /* We have a multipart transact2 resp */
Steve French4b18f2a2008-04-29 00:06:05 +0000576 isMultiRsp = true;
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000577 if (mid_entry->resp_buf) {
Steve Frenche4eb2952005-04-28 22:41:09 -0700578 /* merge response - fix up 1st*/
Steve French50c2f752007-07-13 00:33:32 +0000579 if (coalesce_t2(smb_buffer,
Steve Frenche4eb2952005-04-28 22:41:09 -0700580 mid_entry->resp_buf)) {
Steve French4b18f2a2008-04-29 00:06:05 +0000581 mid_entry->multiRsp =
582 true;
Steve Frenche4eb2952005-04-28 22:41:09 -0700583 break;
584 } else {
585 /* all parts received */
Steve French4b18f2a2008-04-29 00:06:05 +0000586 mid_entry->multiEnd =
587 true;
Steve French50c2f752007-07-13 00:33:32 +0000588 goto multi_t2_fnd;
Steve Frenche4eb2952005-04-28 22:41:09 -0700589 }
590 } else {
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000591 if (!isLargeBuf) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000592 cERROR(1, "1st trans2 resp needs bigbuf");
Steve Frenche4eb2952005-04-28 22:41:09 -0700593 /* BB maybe we can fix this up, switch
Steve French50c2f752007-07-13 00:33:32 +0000594 to already allocated large buffer? */
Steve Frenche4eb2952005-04-28 22:41:09 -0700595 } else {
Steve Frenchcd634992005-04-28 22:41:10 -0700596 /* Have first buffer */
Steve Frenche4eb2952005-04-28 22:41:09 -0700597 mid_entry->resp_buf =
598 smb_buffer;
Steve French4b18f2a2008-04-29 00:06:05 +0000599 mid_entry->largeBuf =
600 true;
Steve Frenche4eb2952005-04-28 22:41:09 -0700601 bigbuf = NULL;
602 }
603 }
604 break;
Steve French50c2f752007-07-13 00:33:32 +0000605 }
Steve Frenche4eb2952005-04-28 22:41:09 -0700606 mid_entry->resp_buf = smb_buffer;
Steve French4b18f2a2008-04-29 00:06:05 +0000607 mid_entry->largeBuf = isLargeBuf;
Steve Frenche4eb2952005-04-28 22:41:09 -0700608multi_t2_fnd:
609 task_to_wake = mid_entry->tsk;
610 mid_entry->midState = MID_RESPONSE_RECEIVED;
Steve French1047abc2005-10-11 19:58:06 -0700611#ifdef CONFIG_CIFS_STATS2
612 mid_entry->when_received = jiffies;
613#endif
Steve French3a5ff612006-07-14 22:37:11 +0000614 /* so we do not time out requests to server
615 which is still responding (since server could
616 be busy but not dead) */
617 server->lstrp = jiffies;
Steve Frenche4eb2952005-04-28 22:41:09 -0700618 break;
619 }
620 }
621 spin_unlock(&GlobalMid_Lock);
622 if (task_to_wake) {
Steve Frenchcd634992005-04-28 22:41:10 -0700623 /* Was previous buf put in mpx struct for multi-rsp? */
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000624 if (!isMultiRsp) {
Steve Frenchcd634992005-04-28 22:41:10 -0700625 /* smb buffer will be freed by user thread */
Steve French26f57362007-08-30 22:09:15 +0000626 if (isLargeBuf)
Steve Frenchcd634992005-04-28 22:41:10 -0700627 bigbuf = NULL;
Steve French26f57362007-08-30 22:09:15 +0000628 else
Steve Frenchcd634992005-04-28 22:41:10 -0700629 smallbuf = NULL;
630 }
Steve Frenche4eb2952005-04-28 22:41:09 -0700631 wake_up_process(task_to_wake);
Steve French4b18f2a2008-04-29 00:06:05 +0000632 } else if (!is_valid_oplock_break(smb_buffer, server) &&
633 !isMultiRsp) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000634 cERROR(1, "No task to wake, unknown frame received! "
635 "NumMids %d", midCount.counter);
Steve French50c2f752007-07-13 00:33:32 +0000636 cifs_dump_mem("Received Data is: ", (char *)smb_buffer,
Steve French70ca7342005-09-22 16:32:06 -0700637 sizeof(struct smb_hdr));
Steve French39798772006-05-31 22:40:51 +0000638#ifdef CONFIG_CIFS_DEBUG2
639 cifs_dump_detail(smb_buffer);
640 cifs_dump_mids(server);
641#endif /* CIFS_DEBUG2 */
Steve French50c2f752007-07-13 00:33:32 +0000642
Steve Frenche4eb2952005-04-28 22:41:09 -0700643 }
644 } /* end while !EXITING */
645
Jeff Laytone7ddee92008-11-14 13:44:38 -0500646 /* take it off the list, if it's not already */
647 write_lock(&cifs_tcp_ses_lock);
648 list_del_init(&server->tcp_ses_list);
649 write_unlock(&cifs_tcp_ses_lock);
650
Linus Torvalds1da177e2005-04-16 15:20:36 -0700651 spin_lock(&GlobalMid_Lock);
652 server->tcpStatus = CifsExiting;
Steve Frenche691b9d2008-05-11 15:53:33 +0000653 spin_unlock(&GlobalMid_Lock);
Steve Frenchdbdbb872008-06-10 21:21:56 +0000654 wake_up_all(&server->response_q);
Steve Frenche691b9d2008-05-11 15:53:33 +0000655
Steve French31ca3bc2005-04-28 22:41:11 -0700656 /* check if we have blocked requests that need to free */
657 /* Note that cifs_max_pending is normally 50, but
658 can be set at module install time to as little as two */
Steve Frenche691b9d2008-05-11 15:53:33 +0000659 spin_lock(&GlobalMid_Lock);
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000660 if (atomic_read(&server->inFlight) >= cifs_max_pending)
Steve French31ca3bc2005-04-28 22:41:11 -0700661 atomic_set(&server->inFlight, cifs_max_pending - 1);
662 /* We do not want to set the max_pending too low or we
663 could end up with the counter going negative */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700664 spin_unlock(&GlobalMid_Lock);
Steve French50c2f752007-07-13 00:33:32 +0000665 /* Although there should not be any requests blocked on
Linus Torvalds1da177e2005-04-16 15:20:36 -0700666 this queue it can not hurt to be paranoid and try to wake up requests
Steve French09d1db52005-04-28 22:41:08 -0700667 that may haven been blocked when more than 50 at time were on the wire
Linus Torvalds1da177e2005-04-16 15:20:36 -0700668 to the same server - they now will see the session is in exit state
669 and get out of SendReceive. */
670 wake_up_all(&server->request_q);
671 /* give those requests time to exit */
Steve Frenchb8643e12005-04-28 22:41:07 -0700672 msleep(125);
Steve French50c2f752007-07-13 00:33:32 +0000673
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000674 if (server->ssocket) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700675 sock_release(csocket);
676 server->ssocket = NULL;
677 }
Steve Frenchb8643e12005-04-28 22:41:07 -0700678 /* buffer usuallly freed in free_mid - need to free it here on exit */
Mariusz Kozlowskia8a11d32007-10-03 16:41:24 +0000679 cifs_buf_release(bigbuf);
680 if (smallbuf) /* no sense logging a debug message if NULL */
Steve Frenchb8643e12005-04-28 22:41:07 -0700681 cifs_small_buf_release(smallbuf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700682
Jeff Layton14fbf502008-11-14 13:53:46 -0500683 /*
684 * BB: we shouldn't have to do any of this. It shouldn't be
685 * possible to exit from the thread with active SMB sessions
686 */
687 read_lock(&cifs_tcp_ses_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700688 if (list_empty(&server->pending_mid_q)) {
Steve French09d1db52005-04-28 22:41:08 -0700689 /* loop through server session structures attached to this and
690 mark them dead */
Jeff Layton14fbf502008-11-14 13:53:46 -0500691 list_for_each(tmp, &server->smb_ses_list) {
692 ses = list_entry(tmp, struct cifsSesInfo,
693 smb_ses_list);
694 ses->status = CifsExiting;
695 ses->server = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700696 }
Jeff Layton14fbf502008-11-14 13:53:46 -0500697 read_unlock(&cifs_tcp_ses_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700698 } else {
Steve French31ca3bc2005-04-28 22:41:11 -0700699 /* although we can not zero the server struct pointer yet,
700 since there are active requests which may depnd on them,
701 mark the corresponding SMB sessions as exiting too */
Jeff Layton14fbf502008-11-14 13:53:46 -0500702 list_for_each(tmp, &server->smb_ses_list) {
Steve French31ca3bc2005-04-28 22:41:11 -0700703 ses = list_entry(tmp, struct cifsSesInfo,
Jeff Layton14fbf502008-11-14 13:53:46 -0500704 smb_ses_list);
705 ses->status = CifsExiting;
Steve French31ca3bc2005-04-28 22:41:11 -0700706 }
707
Linus Torvalds1da177e2005-04-16 15:20:36 -0700708 spin_lock(&GlobalMid_Lock);
709 list_for_each(tmp, &server->pending_mid_q) {
710 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
711 if (mid_entry->midState == MID_REQUEST_SUBMITTED) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000712 cFYI(1, "Clearing Mid 0x%x - waking up ",
713 mid_entry->mid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700714 task_to_wake = mid_entry->tsk;
Steve French26f57362007-08-30 22:09:15 +0000715 if (task_to_wake)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700716 wake_up_process(task_to_wake);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700717 }
718 }
719 spin_unlock(&GlobalMid_Lock);
Jeff Layton14fbf502008-11-14 13:53:46 -0500720 read_unlock(&cifs_tcp_ses_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700721 /* 1/8th of sec is more than enough time for them to exit */
Steve Frenchb8643e12005-04-28 22:41:07 -0700722 msleep(125);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700723 }
724
Steve Frenchf1914012005-08-18 09:37:34 -0700725 if (!list_empty(&server->pending_mid_q)) {
Steve French50c2f752007-07-13 00:33:32 +0000726 /* mpx threads have not exited yet give them
Linus Torvalds1da177e2005-04-16 15:20:36 -0700727 at least the smb send timeout time for long ops */
Steve French31ca3bc2005-04-28 22:41:11 -0700728 /* due to delays on oplock break requests, we need
729 to wait at least 45 seconds before giving up
730 on a request getting a response and going ahead
731 and killing cifsd */
Joe Perchesb6b38f72010-04-21 03:50:45 +0000732 cFYI(1, "Wait for exit from demultiplex thread");
Steve French31ca3bc2005-04-28 22:41:11 -0700733 msleep(46000);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700734 /* if threads still have not exited they are probably never
735 coming home not much else we can do but free the memory */
736 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700737
Steve French31ca3bc2005-04-28 22:41:11 -0700738 /* last chance to mark ses pointers invalid
739 if there are any pointing to this (e.g
Steve French50c2f752007-07-13 00:33:32 +0000740 if a crazy root user tried to kill cifsd
Steve French31ca3bc2005-04-28 22:41:11 -0700741 kernel thread explicitly this might happen) */
Jeff Layton14fbf502008-11-14 13:53:46 -0500742 /* BB: This shouldn't be necessary, see above */
743 read_lock(&cifs_tcp_ses_lock);
744 list_for_each(tmp, &server->smb_ses_list) {
745 ses = list_entry(tmp, struct cifsSesInfo, smb_ses_list);
746 ses->server = NULL;
Steve French31ca3bc2005-04-28 22:41:11 -0700747 }
Jeff Layton14fbf502008-11-14 13:53:46 -0500748 read_unlock(&cifs_tcp_ses_lock);
Steve French31ca3bc2005-04-28 22:41:11 -0700749
Jeff Laytonc359cf32007-11-16 22:22:06 +0000750 kfree(server->hostname);
Jeff Laytonb1c8d2b2008-10-22 13:57:07 -0400751 task_to_wake = xchg(&server->tsk, NULL);
Steve French31ca3bc2005-04-28 22:41:11 -0700752 kfree(server);
Jeff Layton93d0ec82008-08-02 08:00:48 -0400753
754 length = atomic_dec_return(&tcpSesAllocCount);
Steve French26f57362007-08-30 22:09:15 +0000755 if (length > 0)
756 mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
757 GFP_KERNEL);
Steve French50c2f752007-07-13 00:33:32 +0000758
Jeff Laytonb1c8d2b2008-10-22 13:57:07 -0400759 /* if server->tsk was NULL then wait for a signal before exiting */
760 if (!task_to_wake) {
761 set_current_state(TASK_INTERRUPTIBLE);
762 while (!signal_pending(current)) {
763 schedule();
764 set_current_state(TASK_INTERRUPTIBLE);
765 }
766 set_current_state(TASK_RUNNING);
767 }
768
Jeff Layton0468a2c2008-12-01 07:09:35 -0500769 module_put_and_exit(0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700770}
771
Jeff Laytonc359cf32007-11-16 22:22:06 +0000772/* extract the host portion of the UNC string */
773static char *
774extract_hostname(const char *unc)
775{
776 const char *src;
777 char *dst, *delim;
778 unsigned int len;
779
780 /* skip double chars at beginning of string */
781 /* BB: check validity of these bytes? */
782 src = unc + 2;
783
784 /* delimiter between hostname and sharename is always '\\' now */
785 delim = strchr(src, '\\');
786 if (!delim)
787 return ERR_PTR(-EINVAL);
788
789 len = delim - src;
790 dst = kmalloc((len + 1), GFP_KERNEL);
791 if (dst == NULL)
792 return ERR_PTR(-ENOMEM);
793
794 memcpy(dst, src, len);
795 dst[len] = '\0';
796
797 return dst;
798}
799
Linus Torvalds1da177e2005-04-16 15:20:36 -0700800static int
Steve French50c2f752007-07-13 00:33:32 +0000801cifs_parse_mount_options(char *options, const char *devname,
802 struct smb_vol *vol)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700803{
804 char *value;
805 char *data;
806 unsigned int temp_len, i, j;
807 char separator[2];
Jeff Layton9b9d6b242009-07-31 06:56:09 -0400808 short int override_uid = -1;
809 short int override_gid = -1;
810 bool uid_specified = false;
811 bool gid_specified = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700812
813 separator[0] = ',';
Steve French50c2f752007-07-13 00:33:32 +0000814 separator[1] = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700815
Linus Torvalds12e36b22006-10-13 08:09:29 -0700816 if (Local_System_Name[0] != 0)
Steve French50c2f752007-07-13 00:33:32 +0000817 memcpy(vol->source_rfc1001_name, Local_System_Name, 15);
Steve French2cd646a2006-09-28 19:43:08 +0000818 else {
Linus Torvalds12e36b22006-10-13 08:09:29 -0700819 char *nodename = utsname()->nodename;
Steve French50c2f752007-07-13 00:33:32 +0000820 int n = strnlen(nodename, 15);
821 memset(vol->source_rfc1001_name, 0x20, 15);
822 for (i = 0; i < n; i++) {
Steve French2cd646a2006-09-28 19:43:08 +0000823 /* does not have to be perfect mapping since field is
824 informational, only used for servers that do not support
825 port 445 and it can be overridden at mount time */
Linus Torvalds12e36b22006-10-13 08:09:29 -0700826 vol->source_rfc1001_name[i] = toupper(nodename[i]);
Steve French2cd646a2006-09-28 19:43:08 +0000827 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700828 }
829 vol->source_rfc1001_name[15] = 0;
Steve Frencha10faeb22005-08-22 21:38:31 -0700830 /* null target name indicates to use *SMBSERVR default called name
831 if we end up sending RFC1001 session initialize */
832 vol->target_rfc1001_name[0] = 0;
David Howellsa001e5b2008-11-14 10:38:47 +1100833 vol->linux_uid = current_uid(); /* use current_euid() instead? */
834 vol->linux_gid = current_gid();
Jeff Laytonf55ed1a2009-05-26 16:28:11 -0400835
836 /* default to only allowing write access to owner of the mount */
837 vol->dir_mode = vol->file_mode = S_IRUGO | S_IXUGO | S_IWUSR;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700838
839 /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */
Jeremy Allisonac670552005-06-22 17:26:35 -0700840 /* default is always to request posix paths. */
841 vol->posix_paths = 1;
Jeff Laytona0c92172009-05-27 15:40:47 -0400842 /* default to using server inode numbers where available */
843 vol->server_ino = 1;
Jeremy Allisonac670552005-06-22 17:26:35 -0700844
Linus Torvalds1da177e2005-04-16 15:20:36 -0700845 if (!options)
846 return 1;
847
Steve French50c2f752007-07-13 00:33:32 +0000848 if (strncmp(options, "sep=", 4) == 0) {
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000849 if (options[4] != 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700850 separator[0] = options[4];
851 options += 5;
852 } else {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000853 cFYI(1, "Null separator not allowed");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700854 }
855 }
Steve French50c2f752007-07-13 00:33:32 +0000856
Linus Torvalds1da177e2005-04-16 15:20:36 -0700857 while ((data = strsep(&options, separator)) != NULL) {
858 if (!*data)
859 continue;
860 if ((value = strchr(data, '=')) != NULL)
861 *value++ = '\0';
862
Steve French50c2f752007-07-13 00:33:32 +0000863 /* Have to parse this before we parse for "user" */
864 if (strnicmp(data, "user_xattr", 10) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700865 vol->no_xattr = 0;
Steve French50c2f752007-07-13 00:33:32 +0000866 } else if (strnicmp(data, "nouser_xattr", 12) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700867 vol->no_xattr = 1;
868 } else if (strnicmp(data, "user", 4) == 0) {
Steve French4b952a92006-10-30 21:46:13 +0000869 if (!value) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700870 printk(KERN_WARNING
871 "CIFS: invalid or missing username\n");
872 return 1; /* needs_arg; */
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000873 } else if (!*value) {
Steve French4b952a92006-10-30 21:46:13 +0000874 /* null user, ie anonymous, authentication */
875 vol->nullauth = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700876 }
877 if (strnlen(value, 200) < 200) {
878 vol->username = value;
879 } else {
880 printk(KERN_WARNING "CIFS: username too long\n");
881 return 1;
882 }
883 } else if (strnicmp(data, "pass", 4) == 0) {
884 if (!value) {
885 vol->password = NULL;
886 continue;
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000887 } else if (value[0] == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700888 /* check if string begins with double comma
889 since that would mean the password really
890 does start with a comma, and would not
891 indicate an empty string */
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000892 if (value[1] != separator[0]) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700893 vol->password = NULL;
894 continue;
895 }
896 }
897 temp_len = strlen(value);
898 /* removed password length check, NTLM passwords
899 can be arbitrarily long */
900
Steve French50c2f752007-07-13 00:33:32 +0000901 /* if comma in password, the string will be
Linus Torvalds1da177e2005-04-16 15:20:36 -0700902 prematurely null terminated. Commas in password are
903 specified across the cifs mount interface by a double
904 comma ie ,, and a comma used as in other cases ie ','
905 as a parameter delimiter/separator is single and due
906 to the strsep above is temporarily zeroed. */
907
908 /* NB: password legally can have multiple commas and
909 the only illegal character in a password is null */
910
Steve French50c2f752007-07-13 00:33:32 +0000911 if ((value[temp_len] == 0) &&
Steve French09d1db52005-04-28 22:41:08 -0700912 (value[temp_len+1] == separator[0])) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700913 /* reinsert comma */
914 value[temp_len] = separator[0];
Steve French50c2f752007-07-13 00:33:32 +0000915 temp_len += 2; /* move after second comma */
916 while (value[temp_len] != 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700917 if (value[temp_len] == separator[0]) {
Steve French50c2f752007-07-13 00:33:32 +0000918 if (value[temp_len+1] ==
Steve French09d1db52005-04-28 22:41:08 -0700919 separator[0]) {
920 /* skip second comma */
921 temp_len++;
Steve French50c2f752007-07-13 00:33:32 +0000922 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700923 /* single comma indicating start
924 of next parm */
925 break;
926 }
927 }
928 temp_len++;
929 }
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000930 if (value[temp_len] == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700931 options = NULL;
932 } else {
933 value[temp_len] = 0;
934 /* point option to start of next parm */
935 options = value + temp_len + 1;
936 }
Steve French50c2f752007-07-13 00:33:32 +0000937 /* go from value to value + temp_len condensing
Linus Torvalds1da177e2005-04-16 15:20:36 -0700938 double commas to singles. Note that this ends up
939 allocating a few bytes too many, which is ok */
Pekka Enberge915fc42005-09-06 15:18:35 -0700940 vol->password = kzalloc(temp_len, GFP_KERNEL);
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000941 if (vol->password == NULL) {
Steve French50c2f752007-07-13 00:33:32 +0000942 printk(KERN_WARNING "CIFS: no memory "
943 "for password\n");
Steve French433dc242005-04-28 22:41:08 -0700944 return 1;
945 }
Steve French50c2f752007-07-13 00:33:32 +0000946 for (i = 0, j = 0; i < temp_len; i++, j++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700947 vol->password[j] = value[i];
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000948 if (value[i] == separator[0]
Steve French09d1db52005-04-28 22:41:08 -0700949 && value[i+1] == separator[0]) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700950 /* skip second comma */
951 i++;
952 }
953 }
954 vol->password[j] = 0;
955 } else {
Pekka Enberge915fc42005-09-06 15:18:35 -0700956 vol->password = kzalloc(temp_len+1, GFP_KERNEL);
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000957 if (vol->password == NULL) {
Steve French50c2f752007-07-13 00:33:32 +0000958 printk(KERN_WARNING "CIFS: no memory "
959 "for password\n");
Steve French433dc242005-04-28 22:41:08 -0700960 return 1;
961 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700962 strcpy(vol->password, value);
963 }
Jeff Layton58f7f682009-06-10 09:57:55 -0400964 } else if (!strnicmp(data, "ip", 2) ||
965 !strnicmp(data, "addr", 4)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700966 if (!value || !*value) {
967 vol->UNCip = NULL;
Jeff Layton50b64e32009-06-02 06:55:20 -0400968 } else if (strnlen(value, INET6_ADDRSTRLEN) <
969 INET6_ADDRSTRLEN) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700970 vol->UNCip = value;
971 } else {
Steve French50c2f752007-07-13 00:33:32 +0000972 printk(KERN_WARNING "CIFS: ip address "
973 "too long\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700974 return 1;
975 }
Steve French50c2f752007-07-13 00:33:32 +0000976 } else if (strnicmp(data, "sec", 3) == 0) {
977 if (!value || !*value) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000978 cERROR(1, "no security value specified");
Steve French50c2f752007-07-13 00:33:32 +0000979 continue;
980 } else if (strnicmp(value, "krb5i", 5) == 0) {
981 vol->secFlg |= CIFSSEC_MAY_KRB5 |
Steve French189acaa2006-06-23 02:33:48 +0000982 CIFSSEC_MUST_SIGN;
Steve Frenchbf820672005-12-01 22:32:42 -0800983 } else if (strnicmp(value, "krb5p", 5) == 0) {
Steve French50c2f752007-07-13 00:33:32 +0000984 /* vol->secFlg |= CIFSSEC_MUST_SEAL |
985 CIFSSEC_MAY_KRB5; */
Joe Perchesb6b38f72010-04-21 03:50:45 +0000986 cERROR(1, "Krb5 cifs privacy not supported");
Steve Frenchbf820672005-12-01 22:32:42 -0800987 return 1;
988 } else if (strnicmp(value, "krb5", 4) == 0) {
Steve French750d1152006-06-27 06:28:30 +0000989 vol->secFlg |= CIFSSEC_MAY_KRB5;
Steve Frenchac683922009-05-06 04:16:04 +0000990#ifdef CONFIG_CIFS_EXPERIMENTAL
991 } else if (strnicmp(value, "ntlmsspi", 8) == 0) {
992 vol->secFlg |= CIFSSEC_MAY_NTLMSSP |
993 CIFSSEC_MUST_SIGN;
994 } else if (strnicmp(value, "ntlmssp", 7) == 0) {
995 vol->secFlg |= CIFSSEC_MAY_NTLMSSP;
996#endif
Steve Frenchbf820672005-12-01 22:32:42 -0800997 } else if (strnicmp(value, "ntlmv2i", 7) == 0) {
Steve French750d1152006-06-27 06:28:30 +0000998 vol->secFlg |= CIFSSEC_MAY_NTLMV2 |
Steve French189acaa2006-06-23 02:33:48 +0000999 CIFSSEC_MUST_SIGN;
Steve Frenchbf820672005-12-01 22:32:42 -08001000 } else if (strnicmp(value, "ntlmv2", 6) == 0) {
Steve French750d1152006-06-27 06:28:30 +00001001 vol->secFlg |= CIFSSEC_MAY_NTLMV2;
Steve Frenchbf820672005-12-01 22:32:42 -08001002 } else if (strnicmp(value, "ntlmi", 5) == 0) {
Steve French750d1152006-06-27 06:28:30 +00001003 vol->secFlg |= CIFSSEC_MAY_NTLM |
Steve French189acaa2006-06-23 02:33:48 +00001004 CIFSSEC_MUST_SIGN;
Steve Frenchbf820672005-12-01 22:32:42 -08001005 } else if (strnicmp(value, "ntlm", 4) == 0) {
1006 /* ntlm is default so can be turned off too */
Steve French750d1152006-06-27 06:28:30 +00001007 vol->secFlg |= CIFSSEC_MAY_NTLM;
Steve Frenchbf820672005-12-01 22:32:42 -08001008 } else if (strnicmp(value, "nontlm", 6) == 0) {
Steve French189acaa2006-06-23 02:33:48 +00001009 /* BB is there a better way to do this? */
Steve French750d1152006-06-27 06:28:30 +00001010 vol->secFlg |= CIFSSEC_MAY_NTLMV2;
Steve French189acaa2006-06-23 02:33:48 +00001011#ifdef CONFIG_CIFS_WEAK_PW_HASH
1012 } else if (strnicmp(value, "lanman", 6) == 0) {
Steve French50c2f752007-07-13 00:33:32 +00001013 vol->secFlg |= CIFSSEC_MAY_LANMAN;
Steve French189acaa2006-06-23 02:33:48 +00001014#endif
Steve Frenchbf820672005-12-01 22:32:42 -08001015 } else if (strnicmp(value, "none", 4) == 0) {
Steve French189acaa2006-06-23 02:33:48 +00001016 vol->nullauth = 1;
Steve French50c2f752007-07-13 00:33:32 +00001017 } else {
Joe Perchesb6b38f72010-04-21 03:50:45 +00001018 cERROR(1, "bad security option: %s", value);
Steve French50c2f752007-07-13 00:33:32 +00001019 return 1;
1020 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001021 } else if ((strnicmp(data, "unc", 3) == 0)
1022 || (strnicmp(data, "target", 6) == 0)
1023 || (strnicmp(data, "path", 4) == 0)) {
1024 if (!value || !*value) {
Steve French50c2f752007-07-13 00:33:32 +00001025 printk(KERN_WARNING "CIFS: invalid path to "
1026 "network resource\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001027 return 1; /* needs_arg; */
1028 }
1029 if ((temp_len = strnlen(value, 300)) < 300) {
Steve French50c2f752007-07-13 00:33:32 +00001030 vol->UNC = kmalloc(temp_len+1, GFP_KERNEL);
Steve French4523cc32007-04-30 20:13:06 +00001031 if (vol->UNC == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001032 return 1;
Steve French50c2f752007-07-13 00:33:32 +00001033 strcpy(vol->UNC, value);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001034 if (strncmp(vol->UNC, "//", 2) == 0) {
1035 vol->UNC[0] = '\\';
1036 vol->UNC[1] = '\\';
Steve French50c2f752007-07-13 00:33:32 +00001037 } else if (strncmp(vol->UNC, "\\\\", 2) != 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001038 printk(KERN_WARNING
Steve French50c2f752007-07-13 00:33:32 +00001039 "CIFS: UNC Path does not begin "
1040 "with // or \\\\ \n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001041 return 1;
1042 }
1043 } else {
1044 printk(KERN_WARNING "CIFS: UNC name too long\n");
1045 return 1;
1046 }
1047 } else if ((strnicmp(data, "domain", 3) == 0)
1048 || (strnicmp(data, "workgroup", 5) == 0)) {
1049 if (!value || !*value) {
1050 printk(KERN_WARNING "CIFS: invalid domain name\n");
1051 return 1; /* needs_arg; */
1052 }
1053 /* BB are there cases in which a comma can be valid in
1054 a domain name and need special handling? */
Steve French39798772006-05-31 22:40:51 +00001055 if (strnlen(value, 256) < 256) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001056 vol->domainname = value;
Joe Perchesb6b38f72010-04-21 03:50:45 +00001057 cFYI(1, "Domain name set");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001058 } else {
Steve French50c2f752007-07-13 00:33:32 +00001059 printk(KERN_WARNING "CIFS: domain name too "
1060 "long\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001061 return 1;
1062 }
Steve French50c2f752007-07-13 00:33:32 +00001063 } else if (strnicmp(data, "prefixpath", 10) == 0) {
1064 if (!value || !*value) {
1065 printk(KERN_WARNING
1066 "CIFS: invalid path prefix\n");
1067 return 1; /* needs_argument */
1068 }
1069 if ((temp_len = strnlen(value, 1024)) < 1024) {
Steve French4523cc32007-04-30 20:13:06 +00001070 if (value[0] != '/')
Steve French2fe87f02006-09-21 07:02:52 +00001071 temp_len++; /* missing leading slash */
Steve French50c2f752007-07-13 00:33:32 +00001072 vol->prepath = kmalloc(temp_len+1, GFP_KERNEL);
1073 if (vol->prepath == NULL)
1074 return 1;
Steve French4523cc32007-04-30 20:13:06 +00001075 if (value[0] != '/') {
Steve French2fe87f02006-09-21 07:02:52 +00001076 vol->prepath[0] = '/';
Steve French50c2f752007-07-13 00:33:32 +00001077 strcpy(vol->prepath+1, value);
Steve French2fe87f02006-09-21 07:02:52 +00001078 } else
Steve French50c2f752007-07-13 00:33:32 +00001079 strcpy(vol->prepath, value);
Joe Perchesb6b38f72010-04-21 03:50:45 +00001080 cFYI(1, "prefix path %s", vol->prepath);
Steve French50c2f752007-07-13 00:33:32 +00001081 } else {
1082 printk(KERN_WARNING "CIFS: prefix too long\n");
1083 return 1;
1084 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001085 } else if (strnicmp(data, "iocharset", 9) == 0) {
1086 if (!value || !*value) {
Steve French63135e02007-07-17 17:34:02 +00001087 printk(KERN_WARNING "CIFS: invalid iocharset "
1088 "specified\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001089 return 1; /* needs_arg; */
1090 }
1091 if (strnlen(value, 65) < 65) {
Steve French50c2f752007-07-13 00:33:32 +00001092 if (strnicmp(value, "default", 7))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001093 vol->iocharset = value;
Steve French50c2f752007-07-13 00:33:32 +00001094 /* if iocharset not set then load_nls_default
1095 is used by caller */
Joe Perchesb6b38f72010-04-21 03:50:45 +00001096 cFYI(1, "iocharset set to %s", value);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001097 } else {
Steve French63135e02007-07-17 17:34:02 +00001098 printk(KERN_WARNING "CIFS: iocharset name "
1099 "too long.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001100 return 1;
1101 }
Jeff Layton9b9d6b242009-07-31 06:56:09 -04001102 } else if (!strnicmp(data, "uid", 3) && value && *value) {
1103 vol->linux_uid = simple_strtoul(value, &value, 0);
1104 uid_specified = true;
1105 } else if (!strnicmp(data, "forceuid", 8)) {
1106 override_uid = 1;
1107 } else if (!strnicmp(data, "noforceuid", 10)) {
1108 override_uid = 0;
1109 } else if (!strnicmp(data, "gid", 3) && value && *value) {
1110 vol->linux_gid = simple_strtoul(value, &value, 0);
1111 gid_specified = true;
1112 } else if (!strnicmp(data, "forcegid", 8)) {
1113 override_gid = 1;
1114 } else if (!strnicmp(data, "noforcegid", 10)) {
1115 override_gid = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001116 } else if (strnicmp(data, "file_mode", 4) == 0) {
1117 if (value && *value) {
1118 vol->file_mode =
1119 simple_strtoul(value, &value, 0);
1120 }
1121 } else if (strnicmp(data, "dir_mode", 4) == 0) {
1122 if (value && *value) {
1123 vol->dir_mode =
1124 simple_strtoul(value, &value, 0);
1125 }
1126 } else if (strnicmp(data, "dirmode", 4) == 0) {
1127 if (value && *value) {
1128 vol->dir_mode =
1129 simple_strtoul(value, &value, 0);
1130 }
1131 } else if (strnicmp(data, "port", 4) == 0) {
1132 if (value && *value) {
1133 vol->port =
1134 simple_strtoul(value, &value, 0);
1135 }
1136 } else if (strnicmp(data, "rsize", 5) == 0) {
1137 if (value && *value) {
1138 vol->rsize =
1139 simple_strtoul(value, &value, 0);
1140 }
1141 } else if (strnicmp(data, "wsize", 5) == 0) {
1142 if (value && *value) {
1143 vol->wsize =
1144 simple_strtoul(value, &value, 0);
1145 }
1146 } else if (strnicmp(data, "sockopt", 5) == 0) {
Steve French6a5fa2362010-01-01 01:28:43 +00001147 if (!value || !*value) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00001148 cERROR(1, "no socket option specified");
Steve French6a5fa2362010-01-01 01:28:43 +00001149 continue;
1150 } else if (strnicmp(value, "TCP_NODELAY", 11) == 0) {
1151 vol->sockopt_tcp_nodelay = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001152 }
1153 } else if (strnicmp(data, "netbiosname", 4) == 0) {
1154 if (!value || !*value || (*value == ' ')) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00001155 cFYI(1, "invalid (empty) netbiosname");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001156 } else {
Steve French50c2f752007-07-13 00:33:32 +00001157 memset(vol->source_rfc1001_name, 0x20, 15);
1158 for (i = 0; i < 15; i++) {
1159 /* BB are there cases in which a comma can be
Linus Torvalds1da177e2005-04-16 15:20:36 -07001160 valid in this workstation netbios name (and need
1161 special handling)? */
1162
1163 /* We do not uppercase netbiosname for user */
Steve French50c2f752007-07-13 00:33:32 +00001164 if (value[i] == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001165 break;
Steve French50c2f752007-07-13 00:33:32 +00001166 else
1167 vol->source_rfc1001_name[i] =
1168 value[i];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001169 }
1170 /* The string has 16th byte zero still from
1171 set at top of the function */
Steve French50c2f752007-07-13 00:33:32 +00001172 if ((i == 15) && (value[i] != 0))
1173 printk(KERN_WARNING "CIFS: netbiosname"
1174 " longer than 15 truncated.\n");
Steve Frencha10faeb22005-08-22 21:38:31 -07001175 }
1176 } else if (strnicmp(data, "servern", 7) == 0) {
1177 /* servernetbiosname specified override *SMBSERVER */
1178 if (!value || !*value || (*value == ' ')) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00001179 cFYI(1, "empty server netbiosname specified");
Steve Frencha10faeb22005-08-22 21:38:31 -07001180 } else {
1181 /* last byte, type, is 0x20 for servr type */
Steve French50c2f752007-07-13 00:33:32 +00001182 memset(vol->target_rfc1001_name, 0x20, 16);
Steve Frencha10faeb22005-08-22 21:38:31 -07001183
Steve French50c2f752007-07-13 00:33:32 +00001184 for (i = 0; i < 15; i++) {
Steve Frencha10faeb22005-08-22 21:38:31 -07001185 /* BB are there cases in which a comma can be
Steve French50c2f752007-07-13 00:33:32 +00001186 valid in this workstation netbios name
1187 (and need special handling)? */
Steve Frencha10faeb22005-08-22 21:38:31 -07001188
Steve French50c2f752007-07-13 00:33:32 +00001189 /* user or mount helper must uppercase
1190 the netbiosname */
1191 if (value[i] == 0)
Steve Frencha10faeb22005-08-22 21:38:31 -07001192 break;
1193 else
Steve French50c2f752007-07-13 00:33:32 +00001194 vol->target_rfc1001_name[i] =
1195 value[i];
Steve Frencha10faeb22005-08-22 21:38:31 -07001196 }
1197 /* The string has 16th byte zero still from
1198 set at top of the function */
Steve French50c2f752007-07-13 00:33:32 +00001199 if ((i == 15) && (value[i] != 0))
1200 printk(KERN_WARNING "CIFS: server net"
1201 "biosname longer than 15 truncated.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001202 }
1203 } else if (strnicmp(data, "credentials", 4) == 0) {
1204 /* ignore */
1205 } else if (strnicmp(data, "version", 3) == 0) {
1206 /* ignore */
Steve French50c2f752007-07-13 00:33:32 +00001207 } else if (strnicmp(data, "guest", 5) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001208 /* ignore */
Steve French71a394f2009-06-26 04:07:18 +00001209 } else if (strnicmp(data, "rw", 2) == 0) {
1210 /* ignore */
1211 } else if (strnicmp(data, "ro", 2) == 0) {
1212 /* ignore */
Steve Frenchedf1ae42008-10-29 00:47:57 +00001213 } else if (strnicmp(data, "noblocksend", 11) == 0) {
1214 vol->noblocksnd = 1;
1215 } else if (strnicmp(data, "noautotune", 10) == 0) {
1216 vol->noautotune = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001217 } else if ((strnicmp(data, "suid", 4) == 0) ||
1218 (strnicmp(data, "nosuid", 6) == 0) ||
1219 (strnicmp(data, "exec", 4) == 0) ||
1220 (strnicmp(data, "noexec", 6) == 0) ||
1221 (strnicmp(data, "nodev", 5) == 0) ||
1222 (strnicmp(data, "noauto", 6) == 0) ||
1223 (strnicmp(data, "dev", 3) == 0)) {
1224 /* The mount tool or mount.cifs helper (if present)
Steve French50c2f752007-07-13 00:33:32 +00001225 uses these opts to set flags, and the flags are read
1226 by the kernel vfs layer before we get here (ie
1227 before read super) so there is no point trying to
1228 parse these options again and set anything and it
1229 is ok to just ignore them */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001230 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001231 } else if (strnicmp(data, "hard", 4) == 0) {
1232 vol->retry = 1;
1233 } else if (strnicmp(data, "soft", 4) == 0) {
1234 vol->retry = 0;
1235 } else if (strnicmp(data, "perm", 4) == 0) {
1236 vol->noperm = 0;
1237 } else if (strnicmp(data, "noperm", 6) == 0) {
1238 vol->noperm = 1;
Steve French6a0b4822005-04-28 22:41:05 -07001239 } else if (strnicmp(data, "mapchars", 8) == 0) {
1240 vol->remap = 1;
1241 } else if (strnicmp(data, "nomapchars", 10) == 0) {
1242 vol->remap = 0;
Steve French50c2f752007-07-13 00:33:32 +00001243 } else if (strnicmp(data, "sfu", 3) == 0) {
1244 vol->sfu_emul = 1;
1245 } else if (strnicmp(data, "nosfu", 5) == 0) {
1246 vol->sfu_emul = 0;
Steve French2c1b8612008-10-16 18:35:21 +00001247 } else if (strnicmp(data, "nodfs", 5) == 0) {
1248 vol->nodfs = 1;
Jeremy Allisonac670552005-06-22 17:26:35 -07001249 } else if (strnicmp(data, "posixpaths", 10) == 0) {
1250 vol->posix_paths = 1;
1251 } else if (strnicmp(data, "noposixpaths", 12) == 0) {
1252 vol->posix_paths = 0;
Steve Frenchc18c8422007-07-18 23:21:09 +00001253 } else if (strnicmp(data, "nounix", 6) == 0) {
1254 vol->no_linux_ext = 1;
1255 } else if (strnicmp(data, "nolinux", 7) == 0) {
1256 vol->no_linux_ext = 1;
Steve French50c2f752007-07-13 00:33:32 +00001257 } else if ((strnicmp(data, "nocase", 6) == 0) ||
Steve Frencha10faeb22005-08-22 21:38:31 -07001258 (strnicmp(data, "ignorecase", 10) == 0)) {
Steve French50c2f752007-07-13 00:33:32 +00001259 vol->nocase = 1;
Steve Frenchc46fa8a2005-08-18 20:49:57 -07001260 } else if (strnicmp(data, "brl", 3) == 0) {
1261 vol->nobrl = 0;
Steve French50c2f752007-07-13 00:33:32 +00001262 } else if ((strnicmp(data, "nobrl", 5) == 0) ||
Steve French1c955182005-08-30 20:58:07 -07001263 (strnicmp(data, "nolock", 6) == 0)) {
Steve Frenchc46fa8a2005-08-18 20:49:57 -07001264 vol->nobrl = 1;
Steve Frenchd3485d32005-08-19 11:04:29 -07001265 /* turn off mandatory locking in mode
1266 if remote locking is turned off since the
1267 local vfs will do advisory */
Steve French50c2f752007-07-13 00:33:32 +00001268 if (vol->file_mode ==
1269 (S_IALLUGO & ~(S_ISUID | S_IXGRP)))
Steve Frenchd3485d32005-08-19 11:04:29 -07001270 vol->file_mode = S_IALLUGO;
Steve French13a6e422008-12-02 17:24:33 +00001271 } else if (strnicmp(data, "forcemandatorylock", 9) == 0) {
1272 /* will take the shorter form "forcemand" as well */
1273 /* This mount option will force use of mandatory
1274 (DOS/Windows style) byte range locks, instead of
1275 using posix advisory byte range locks, even if the
1276 Unix extensions are available and posix locks would
1277 be supported otherwise. If Unix extensions are not
1278 negotiated this has no effect since mandatory locks
1279 would be used (mandatory locks is all that those
1280 those servers support) */
1281 vol->mand_lock = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001282 } else if (strnicmp(data, "setuids", 7) == 0) {
1283 vol->setuids = 1;
1284 } else if (strnicmp(data, "nosetuids", 9) == 0) {
1285 vol->setuids = 0;
Jeff Laytond0a9c072008-05-12 22:23:49 +00001286 } else if (strnicmp(data, "dynperm", 7) == 0) {
1287 vol->dynperm = true;
1288 } else if (strnicmp(data, "nodynperm", 9) == 0) {
1289 vol->dynperm = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001290 } else if (strnicmp(data, "nohard", 6) == 0) {
1291 vol->retry = 0;
1292 } else if (strnicmp(data, "nosoft", 6) == 0) {
1293 vol->retry = 1;
1294 } else if (strnicmp(data, "nointr", 6) == 0) {
1295 vol->intr = 0;
1296 } else if (strnicmp(data, "intr", 4) == 0) {
1297 vol->intr = 1;
Steve Frenchbe652442009-02-23 15:21:59 +00001298 } else if (strnicmp(data, "nostrictsync", 12) == 0) {
1299 vol->nostrictsync = 1;
1300 } else if (strnicmp(data, "strictsync", 10) == 0) {
1301 vol->nostrictsync = 0;
Steve French50c2f752007-07-13 00:33:32 +00001302 } else if (strnicmp(data, "serverino", 7) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001303 vol->server_ino = 1;
Steve French50c2f752007-07-13 00:33:32 +00001304 } else if (strnicmp(data, "noserverino", 9) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001305 vol->server_ino = 0;
Steve French50c2f752007-07-13 00:33:32 +00001306 } else if (strnicmp(data, "cifsacl", 7) == 0) {
Steve French0a4b92c2006-01-12 15:44:21 -08001307 vol->cifs_acl = 1;
1308 } else if (strnicmp(data, "nocifsacl", 9) == 0) {
1309 vol->cifs_acl = 0;
Steve French50c2f752007-07-13 00:33:32 +00001310 } else if (strnicmp(data, "acl", 3) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001311 vol->no_psx_acl = 0;
Steve French50c2f752007-07-13 00:33:32 +00001312 } else if (strnicmp(data, "noacl", 5) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001313 vol->no_psx_acl = 1;
Steve French84210e92008-10-23 04:42:37 +00001314#ifdef CONFIG_CIFS_EXPERIMENTAL
1315 } else if (strnicmp(data, "locallease", 6) == 0) {
1316 vol->local_lease = 1;
1317#endif
Steve French50c2f752007-07-13 00:33:32 +00001318 } else if (strnicmp(data, "sign", 4) == 0) {
Steve French750d1152006-06-27 06:28:30 +00001319 vol->secFlg |= CIFSSEC_MUST_SIGN;
Steve French95b1cb92008-05-15 16:44:38 +00001320 } else if (strnicmp(data, "seal", 4) == 0) {
1321 /* we do not do the following in secFlags because seal
1322 is a per tree connection (mount) not a per socket
1323 or per-smb connection option in the protocol */
1324 /* vol->secFlg |= CIFSSEC_MUST_SEAL; */
1325 vol->seal = 1;
Steve French50c2f752007-07-13 00:33:32 +00001326 } else if (strnicmp(data, "direct", 6) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001327 vol->direct_io = 1;
Steve French50c2f752007-07-13 00:33:32 +00001328 } else if (strnicmp(data, "forcedirectio", 13) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001329 vol->direct_io = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001330 } else if (strnicmp(data, "noac", 4) == 0) {
Steve French50c2f752007-07-13 00:33:32 +00001331 printk(KERN_WARNING "CIFS: Mount option noac not "
1332 "supported. Instead set "
1333 "/proc/fs/cifs/LookupCacheEnabled to 0\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001334 } else
Steve French50c2f752007-07-13 00:33:32 +00001335 printk(KERN_WARNING "CIFS: Unknown mount option %s\n",
1336 data);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001337 }
1338 if (vol->UNC == NULL) {
Steve French4523cc32007-04-30 20:13:06 +00001339 if (devname == NULL) {
Steve French50c2f752007-07-13 00:33:32 +00001340 printk(KERN_WARNING "CIFS: Missing UNC name for mount "
1341 "target\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001342 return 1;
1343 }
1344 if ((temp_len = strnlen(devname, 300)) < 300) {
Steve French50c2f752007-07-13 00:33:32 +00001345 vol->UNC = kmalloc(temp_len+1, GFP_KERNEL);
Steve French4523cc32007-04-30 20:13:06 +00001346 if (vol->UNC == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001347 return 1;
Steve French50c2f752007-07-13 00:33:32 +00001348 strcpy(vol->UNC, devname);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001349 if (strncmp(vol->UNC, "//", 2) == 0) {
1350 vol->UNC[0] = '\\';
1351 vol->UNC[1] = '\\';
1352 } else if (strncmp(vol->UNC, "\\\\", 2) != 0) {
Steve French50c2f752007-07-13 00:33:32 +00001353 printk(KERN_WARNING "CIFS: UNC Path does not "
1354 "begin with // or \\\\ \n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001355 return 1;
1356 }
Igor Mammedov7c5e6282008-05-08 20:48:42 +00001357 value = strpbrk(vol->UNC+2, "/\\");
1358 if (value)
1359 *value = '\\';
Linus Torvalds1da177e2005-04-16 15:20:36 -07001360 } else {
1361 printk(KERN_WARNING "CIFS: UNC name too long\n");
1362 return 1;
1363 }
1364 }
Steve Frenchfb8c4b12007-07-10 01:16:18 +00001365 if (vol->UNCip == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001366 vol->UNCip = &vol->UNC[2];
1367
Jeff Layton9b9d6b242009-07-31 06:56:09 -04001368 if (uid_specified)
1369 vol->override_uid = override_uid;
1370 else if (override_uid == 1)
1371 printk(KERN_NOTICE "CIFS: ignoring forceuid mount option "
1372 "specified with no uid= option.\n");
1373
1374 if (gid_specified)
1375 vol->override_gid = override_gid;
1376 else if (override_gid == 1)
1377 printk(KERN_NOTICE "CIFS: ignoring forcegid mount option "
1378 "specified with no gid= option.\n");
1379
Linus Torvalds1da177e2005-04-16 15:20:36 -07001380 return 0;
1381}
1382
Jeff Laytone7ddee92008-11-14 13:44:38 -05001383static struct TCP_Server_Info *
Suresh Jayaramanbdb97ad2009-08-20 13:03:34 +05301384cifs_find_tcp_session(struct sockaddr_storage *addr, unsigned short int port)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001385{
1386 struct list_head *tmp;
Jeff Laytone7ddee92008-11-14 13:44:38 -05001387 struct TCP_Server_Info *server;
1388 struct sockaddr_in *addr4 = (struct sockaddr_in *) addr;
1389 struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *) addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001390
Jeff Laytone7ddee92008-11-14 13:44:38 -05001391 write_lock(&cifs_tcp_ses_lock);
1392 list_for_each(tmp, &cifs_tcp_ses_list) {
1393 server = list_entry(tmp, struct TCP_Server_Info,
1394 tcp_ses_list);
Jeff Laytone7ddee92008-11-14 13:44:38 -05001395 /*
1396 * the demux thread can exit on its own while still in CifsNew
1397 * so don't accept any sockets in that state. Since the
1398 * tcpStatus never changes back to CifsNew it's safe to check
1399 * for this without a lock.
1400 */
1401 if (server->tcpStatus == CifsNew)
Cyrill Gorcunov1b20d672008-05-09 18:17:21 +00001402 continue;
Steve French50c2f752007-07-13 00:33:32 +00001403
Suresh Jayaramanbdb97ad2009-08-20 13:03:34 +05301404 switch (addr->ss_family) {
1405 case AF_INET:
1406 if (addr4->sin_addr.s_addr ==
1407 server->addr.sockAddr.sin_addr.s_addr) {
1408 addr4->sin_port = htons(port);
1409 /* user overrode default port? */
1410 if (addr4->sin_port) {
1411 if (addr4->sin_port !=
1412 server->addr.sockAddr.sin_port)
1413 continue;
1414 }
1415 break;
1416 } else
1417 continue;
1418
1419 case AF_INET6:
1420 if (ipv6_addr_equal(&addr6->sin6_addr,
1421 &server->addr.sockAddr6.sin6_addr) &&
Steve Frenchca43e3b2009-09-01 17:20:50 +00001422 (addr6->sin6_scope_id ==
Suresh Jayaramanbdb97ad2009-08-20 13:03:34 +05301423 server->addr.sockAddr6.sin6_scope_id)) {
1424 addr6->sin6_port = htons(port);
1425 /* user overrode default port? */
1426 if (addr6->sin6_port) {
Steve Frenchca43e3b2009-09-01 17:20:50 +00001427 if (addr6->sin6_port !=
Suresh Jayaramanbdb97ad2009-08-20 13:03:34 +05301428 server->addr.sockAddr6.sin6_port)
Steve Frenchca43e3b2009-09-01 17:20:50 +00001429 continue;
Suresh Jayaramanbdb97ad2009-08-20 13:03:34 +05301430 }
1431 break;
Steve Frenchca43e3b2009-09-01 17:20:50 +00001432 } else
Suresh Jayaramanbdb97ad2009-08-20 13:03:34 +05301433 continue;
1434 }
Steve French50c2f752007-07-13 00:33:32 +00001435
Jeff Laytone7ddee92008-11-14 13:44:38 -05001436 ++server->srv_count;
1437 write_unlock(&cifs_tcp_ses_lock);
Joe Perchesb6b38f72010-04-21 03:50:45 +00001438 cFYI(1, "Existing tcp session with server found");
Jeff Laytone7ddee92008-11-14 13:44:38 -05001439 return server;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001440 }
Jeff Laytone7ddee92008-11-14 13:44:38 -05001441 write_unlock(&cifs_tcp_ses_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001442 return NULL;
1443}
1444
Jeff Layton14fbf502008-11-14 13:53:46 -05001445static void
Jeff Laytone7ddee92008-11-14 13:44:38 -05001446cifs_put_tcp_session(struct TCP_Server_Info *server)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001447{
Jeff Laytone7ddee92008-11-14 13:44:38 -05001448 struct task_struct *task;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001449
Jeff Laytone7ddee92008-11-14 13:44:38 -05001450 write_lock(&cifs_tcp_ses_lock);
1451 if (--server->srv_count > 0) {
1452 write_unlock(&cifs_tcp_ses_lock);
1453 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001454 }
Steve Frenchdea570e02008-05-06 22:05:51 +00001455
Jeff Laytone7ddee92008-11-14 13:44:38 -05001456 list_del_init(&server->tcp_ses_list);
1457 write_unlock(&cifs_tcp_ses_lock);
1458
1459 spin_lock(&GlobalMid_Lock);
1460 server->tcpStatus = CifsExiting;
1461 spin_unlock(&GlobalMid_Lock);
1462
1463 task = xchg(&server->tsk, NULL);
1464 if (task)
1465 force_sig(SIGKILL, task);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001466}
1467
Jeff Layton63c038c2008-12-01 18:41:46 -05001468static struct TCP_Server_Info *
1469cifs_get_tcp_session(struct smb_vol *volume_info)
1470{
1471 struct TCP_Server_Info *tcp_ses = NULL;
Jeff Laytona9ac49d2009-01-22 14:43:21 -05001472 struct sockaddr_storage addr;
Jeff Layton63c038c2008-12-01 18:41:46 -05001473 struct sockaddr_in *sin_server = (struct sockaddr_in *) &addr;
1474 struct sockaddr_in6 *sin_server6 = (struct sockaddr_in6 *) &addr;
1475 int rc;
1476
Jeff Laytona9ac49d2009-01-22 14:43:21 -05001477 memset(&addr, 0, sizeof(struct sockaddr_storage));
Jeff Layton63c038c2008-12-01 18:41:46 -05001478
Joe Perchesb6b38f72010-04-21 03:50:45 +00001479 cFYI(1, "UNC: %s ip: %s", volume_info->UNC, volume_info->UNCip);
Jeff Layton1e68b2b2009-06-11 10:27:30 -04001480
Jeff Layton63c038c2008-12-01 18:41:46 -05001481 if (volume_info->UNCip && volume_info->UNC) {
Jeff Layton1e68b2b2009-06-11 10:27:30 -04001482 rc = cifs_convert_address(volume_info->UNCip, &addr);
1483 if (!rc) {
Jeff Layton63c038c2008-12-01 18:41:46 -05001484 /* we failed translating address */
1485 rc = -EINVAL;
1486 goto out_err;
1487 }
Jeff Layton63c038c2008-12-01 18:41:46 -05001488 } else if (volume_info->UNCip) {
1489 /* BB using ip addr as tcp_ses name to connect to the
1490 DFS root below */
Joe Perchesb6b38f72010-04-21 03:50:45 +00001491 cERROR(1, "Connecting to DFS root not implemented yet");
Jeff Layton63c038c2008-12-01 18:41:46 -05001492 rc = -EINVAL;
1493 goto out_err;
1494 } else /* which tcp_sess DFS root would we conect to */ {
Joe Perchesb6b38f72010-04-21 03:50:45 +00001495 cERROR(1, "CIFS mount error: No UNC path (e.g. -o "
1496 "unc=//192.168.1.100/public) specified");
Jeff Layton63c038c2008-12-01 18:41:46 -05001497 rc = -EINVAL;
1498 goto out_err;
1499 }
1500
1501 /* see if we already have a matching tcp_ses */
Suresh Jayaramanbdb97ad2009-08-20 13:03:34 +05301502 tcp_ses = cifs_find_tcp_session(&addr, volume_info->port);
Jeff Layton63c038c2008-12-01 18:41:46 -05001503 if (tcp_ses)
1504 return tcp_ses;
1505
1506 tcp_ses = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL);
1507 if (!tcp_ses) {
1508 rc = -ENOMEM;
1509 goto out_err;
1510 }
1511
1512 tcp_ses->hostname = extract_hostname(volume_info->UNC);
1513 if (IS_ERR(tcp_ses->hostname)) {
1514 rc = PTR_ERR(tcp_ses->hostname);
1515 goto out_err;
1516 }
1517
1518 tcp_ses->noblocksnd = volume_info->noblocksnd;
1519 tcp_ses->noautotune = volume_info->noautotune;
Steve French6a5fa2362010-01-01 01:28:43 +00001520 tcp_ses->tcp_nodelay = volume_info->sockopt_tcp_nodelay;
Jeff Layton63c038c2008-12-01 18:41:46 -05001521 atomic_set(&tcp_ses->inFlight, 0);
1522 init_waitqueue_head(&tcp_ses->response_q);
1523 init_waitqueue_head(&tcp_ses->request_q);
1524 INIT_LIST_HEAD(&tcp_ses->pending_mid_q);
1525 mutex_init(&tcp_ses->srv_mutex);
1526 memcpy(tcp_ses->workstation_RFC1001_name,
1527 volume_info->source_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL);
1528 memcpy(tcp_ses->server_RFC1001_name,
1529 volume_info->target_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL);
1530 tcp_ses->sequence_number = 0;
1531 INIT_LIST_HEAD(&tcp_ses->tcp_ses_list);
1532 INIT_LIST_HEAD(&tcp_ses->smb_ses_list);
1533
1534 /*
1535 * at this point we are the only ones with the pointer
1536 * to the struct since the kernel thread not created yet
1537 * no need to spinlock this init of tcpStatus or srv_count
1538 */
1539 tcp_ses->tcpStatus = CifsNew;
1540 ++tcp_ses->srv_count;
1541
Jeff Laytona9ac49d2009-01-22 14:43:21 -05001542 if (addr.ss_family == AF_INET6) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00001543 cFYI(1, "attempting ipv6 connect");
Jeff Layton63c038c2008-12-01 18:41:46 -05001544 /* BB should we allow ipv6 on port 139? */
1545 /* other OS never observed in Wild doing 139 with v6 */
Simo Leone6debdbc2009-06-25 02:44:43 +00001546 sin_server6->sin6_port = htons(volume_info->port);
Jeff Layton63c038c2008-12-01 18:41:46 -05001547 memcpy(&tcp_ses->addr.sockAddr6, sin_server6,
1548 sizeof(struct sockaddr_in6));
Jeff Laytond5c56052008-12-01 18:42:33 -05001549 rc = ipv6_connect(tcp_ses);
Jeff Layton63c038c2008-12-01 18:41:46 -05001550 } else {
Simo Leone6debdbc2009-06-25 02:44:43 +00001551 sin_server->sin_port = htons(volume_info->port);
Jeff Layton63c038c2008-12-01 18:41:46 -05001552 memcpy(&tcp_ses->addr.sockAddr, sin_server,
1553 sizeof(struct sockaddr_in));
Jeff Laytonbcf4b102008-12-01 18:42:15 -05001554 rc = ipv4_connect(tcp_ses);
Jeff Layton63c038c2008-12-01 18:41:46 -05001555 }
1556 if (rc < 0) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00001557 cERROR(1, "Error connecting to socket. Aborting operation");
Jeff Layton63c038c2008-12-01 18:41:46 -05001558 goto out_err;
1559 }
1560
1561 /*
1562 * since we're in a cifs function already, we know that
1563 * this will succeed. No need for try_module_get().
1564 */
1565 __module_get(THIS_MODULE);
1566 tcp_ses->tsk = kthread_run((void *)(void *)cifs_demultiplex_thread,
1567 tcp_ses, "cifsd");
1568 if (IS_ERR(tcp_ses->tsk)) {
1569 rc = PTR_ERR(tcp_ses->tsk);
Joe Perchesb6b38f72010-04-21 03:50:45 +00001570 cERROR(1, "error %d create cifsd thread", rc);
Jeff Layton63c038c2008-12-01 18:41:46 -05001571 module_put(THIS_MODULE);
1572 goto out_err;
1573 }
1574
1575 /* thread spawned, put it on the list */
1576 write_lock(&cifs_tcp_ses_lock);
1577 list_add(&tcp_ses->tcp_ses_list, &cifs_tcp_ses_list);
1578 write_unlock(&cifs_tcp_ses_lock);
1579
1580 return tcp_ses;
1581
1582out_err:
1583 if (tcp_ses) {
Steve French8347a5c2009-10-06 18:31:29 +00001584 if (!IS_ERR(tcp_ses->hostname))
1585 kfree(tcp_ses->hostname);
Jeff Layton63c038c2008-12-01 18:41:46 -05001586 if (tcp_ses->ssocket)
1587 sock_release(tcp_ses->ssocket);
1588 kfree(tcp_ses);
1589 }
1590 return ERR_PTR(rc);
1591}
1592
Linus Torvalds1da177e2005-04-16 15:20:36 -07001593static struct cifsSesInfo *
Jeff Layton14fbf502008-11-14 13:53:46 -05001594cifs_find_smb_ses(struct TCP_Server_Info *server, char *username)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001595{
1596 struct list_head *tmp;
1597 struct cifsSesInfo *ses;
1598
Jeff Layton14fbf502008-11-14 13:53:46 -05001599 write_lock(&cifs_tcp_ses_lock);
1600 list_for_each(tmp, &server->smb_ses_list) {
1601 ses = list_entry(tmp, struct cifsSesInfo, smb_ses_list);
1602 if (strncmp(ses->userName, username, MAX_USERNAME_SIZE))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001603 continue;
1604
Jeff Layton14fbf502008-11-14 13:53:46 -05001605 ++ses->ses_count;
1606 write_unlock(&cifs_tcp_ses_lock);
1607 return ses;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001608 }
Jeff Layton14fbf502008-11-14 13:53:46 -05001609 write_unlock(&cifs_tcp_ses_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001610 return NULL;
1611}
1612
Jeff Layton14fbf502008-11-14 13:53:46 -05001613static void
1614cifs_put_smb_ses(struct cifsSesInfo *ses)
1615{
1616 int xid;
1617 struct TCP_Server_Info *server = ses->server;
1618
Jeff Layton36988c72010-04-24 07:57:43 -04001619 cFYI(1, "%s: ses_count=%d\n", __func__, ses->ses_count);
Jeff Layton14fbf502008-11-14 13:53:46 -05001620 write_lock(&cifs_tcp_ses_lock);
1621 if (--ses->ses_count > 0) {
1622 write_unlock(&cifs_tcp_ses_lock);
1623 return;
1624 }
1625
1626 list_del_init(&ses->smb_ses_list);
1627 write_unlock(&cifs_tcp_ses_lock);
1628
1629 if (ses->status == CifsGood) {
1630 xid = GetXid();
1631 CIFSSMBLogoff(xid, ses);
1632 _FreeXid(xid);
1633 }
1634 sesInfoFree(ses);
1635 cifs_put_tcp_session(server);
1636}
1637
Jeff Layton36988c72010-04-24 07:57:43 -04001638static struct cifsSesInfo *
1639cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info)
1640{
1641 int rc = -ENOMEM, xid;
1642 struct cifsSesInfo *ses;
1643
1644 xid = GetXid();
1645
1646 ses = cifs_find_smb_ses(server, volume_info->username);
1647 if (ses) {
1648 cFYI(1, "Existing smb sess found (status=%d)", ses->status);
1649
1650 /* existing SMB ses has a server reference already */
1651 cifs_put_tcp_session(server);
1652
1653 mutex_lock(&ses->session_mutex);
1654 if (ses->need_reconnect) {
1655 cFYI(1, "Session needs reconnect");
1656 rc = cifs_setup_session(xid, ses,
1657 volume_info->local_nls);
1658 if (rc) {
1659 mutex_unlock(&ses->session_mutex);
1660 /* problem -- put our reference */
1661 cifs_put_smb_ses(ses);
1662 FreeXid(xid);
1663 return ERR_PTR(rc);
1664 }
1665 }
1666 mutex_unlock(&ses->session_mutex);
1667 FreeXid(xid);
1668 return ses;
1669 }
1670
1671 cFYI(1, "Existing smb sess not found");
1672 ses = sesInfoAlloc();
1673 if (ses == NULL)
1674 goto get_ses_fail;
1675
1676 /* new SMB session uses our server ref */
1677 ses->server = server;
1678 if (server->addr.sockAddr6.sin6_family == AF_INET6)
1679 sprintf(ses->serverName, "%pI6",
1680 &server->addr.sockAddr6.sin6_addr);
1681 else
1682 sprintf(ses->serverName, "%pI4",
1683 &server->addr.sockAddr.sin_addr.s_addr);
1684
1685 if (volume_info->username)
1686 strncpy(ses->userName, volume_info->username,
1687 MAX_USERNAME_SIZE);
1688
1689 /* volume_info->password freed at unmount */
1690 if (volume_info->password) {
1691 ses->password = kstrdup(volume_info->password, GFP_KERNEL);
1692 if (!ses->password)
1693 goto get_ses_fail;
1694 }
1695 if (volume_info->domainname) {
1696 int len = strlen(volume_info->domainname);
1697 ses->domainName = kmalloc(len + 1, GFP_KERNEL);
1698 if (ses->domainName)
1699 strcpy(ses->domainName, volume_info->domainname);
1700 }
1701 ses->linux_uid = volume_info->linux_uid;
1702 ses->overrideSecFlg = volume_info->secFlg;
1703
1704 mutex_lock(&ses->session_mutex);
1705 rc = cifs_setup_session(xid, ses, volume_info->local_nls);
1706 mutex_unlock(&ses->session_mutex);
1707 if (rc)
1708 goto get_ses_fail;
1709
1710 /* success, put it on the list */
1711 write_lock(&cifs_tcp_ses_lock);
1712 list_add(&ses->smb_ses_list, &server->smb_ses_list);
1713 write_unlock(&cifs_tcp_ses_lock);
1714
1715 FreeXid(xid);
1716 return ses;
1717
1718get_ses_fail:
1719 sesInfoFree(ses);
1720 FreeXid(xid);
1721 return ERR_PTR(rc);
1722}
1723
Linus Torvalds1da177e2005-04-16 15:20:36 -07001724static struct cifsTconInfo *
Jeff Laytonf1987b42008-11-15 11:12:47 -05001725cifs_find_tcon(struct cifsSesInfo *ses, const char *unc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001726{
1727 struct list_head *tmp;
1728 struct cifsTconInfo *tcon;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001729
Jeff Laytonf1987b42008-11-15 11:12:47 -05001730 write_lock(&cifs_tcp_ses_lock);
1731 list_for_each(tmp, &ses->tcon_list) {
1732 tcon = list_entry(tmp, struct cifsTconInfo, tcon_list);
1733 if (tcon->tidStatus == CifsExiting)
1734 continue;
1735 if (strncmp(tcon->treeName, unc, MAX_TREE_SIZE))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001736 continue;
1737
Jeff Laytonf1987b42008-11-15 11:12:47 -05001738 ++tcon->tc_count;
1739 write_unlock(&cifs_tcp_ses_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001740 return tcon;
1741 }
Jeff Laytonf1987b42008-11-15 11:12:47 -05001742 write_unlock(&cifs_tcp_ses_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001743 return NULL;
1744}
1745
Jeff Laytonf1987b42008-11-15 11:12:47 -05001746static void
1747cifs_put_tcon(struct cifsTconInfo *tcon)
1748{
1749 int xid;
1750 struct cifsSesInfo *ses = tcon->ses;
1751
Jeff Laytond00c28d2010-04-24 07:57:44 -04001752 cFYI(1, "%s: tc_count=%d\n", __func__, tcon->tc_count);
Jeff Laytonf1987b42008-11-15 11:12:47 -05001753 write_lock(&cifs_tcp_ses_lock);
1754 if (--tcon->tc_count > 0) {
1755 write_unlock(&cifs_tcp_ses_lock);
1756 return;
1757 }
1758
1759 list_del_init(&tcon->tcon_list);
1760 write_unlock(&cifs_tcp_ses_lock);
1761
1762 xid = GetXid();
1763 CIFSSMBTDis(xid, tcon);
1764 _FreeXid(xid);
1765
Jeff Laytonf1987b42008-11-15 11:12:47 -05001766 tconInfoFree(tcon);
1767 cifs_put_smb_ses(ses);
1768}
1769
Jeff Laytond00c28d2010-04-24 07:57:44 -04001770static struct cifsTconInfo *
1771cifs_get_tcon(struct cifsSesInfo *ses, struct smb_vol *volume_info)
1772{
1773 int rc, xid;
1774 struct cifsTconInfo *tcon;
1775
1776 tcon = cifs_find_tcon(ses, volume_info->UNC);
1777 if (tcon) {
1778 cFYI(1, "Found match on UNC path");
1779 /* existing tcon already has a reference */
1780 cifs_put_smb_ses(ses);
1781 if (tcon->seal != volume_info->seal)
1782 cERROR(1, "transport encryption setting "
1783 "conflicts with existing tid");
1784 return tcon;
1785 }
1786
1787 tcon = tconInfoAlloc();
1788 if (tcon == NULL) {
1789 rc = -ENOMEM;
1790 goto out_fail;
1791 }
1792
1793 tcon->ses = ses;
1794 if (volume_info->password) {
1795 tcon->password = kstrdup(volume_info->password, GFP_KERNEL);
1796 if (!tcon->password) {
1797 rc = -ENOMEM;
1798 goto out_fail;
1799 }
1800 }
1801
1802 if (strchr(volume_info->UNC + 3, '\\') == NULL
1803 && strchr(volume_info->UNC + 3, '/') == NULL) {
1804 cERROR(1, "Missing share name");
1805 rc = -ENODEV;
1806 goto out_fail;
1807 }
1808
1809 /* BB Do we need to wrap session_mutex around
1810 * this TCon call and Unix SetFS as
1811 * we do on SessSetup and reconnect? */
1812 xid = GetXid();
1813 rc = CIFSTCon(xid, ses, volume_info->UNC, tcon, volume_info->local_nls);
1814 FreeXid(xid);
1815 cFYI(1, "CIFS Tcon rc = %d", rc);
1816 if (rc)
1817 goto out_fail;
1818
1819 if (volume_info->nodfs) {
1820 tcon->Flags &= ~SMB_SHARE_IS_IN_DFS;
1821 cFYI(1, "DFS disabled (%d)", tcon->Flags);
1822 }
1823 tcon->seal = volume_info->seal;
1824 /* we can have only one retry value for a connection
1825 to a share so for resources mounted more than once
1826 to the same server share the last value passed in
1827 for the retry flag is used */
1828 tcon->retry = volume_info->retry;
1829 tcon->nocase = volume_info->nocase;
1830 tcon->local_lease = volume_info->local_lease;
1831
1832 write_lock(&cifs_tcp_ses_lock);
1833 list_add(&tcon->tcon_list, &ses->tcon_list);
1834 write_unlock(&cifs_tcp_ses_lock);
1835
1836 return tcon;
1837
1838out_fail:
1839 tconInfoFree(tcon);
1840 return ERR_PTR(rc);
1841}
1842
1843
Linus Torvalds1da177e2005-04-16 15:20:36 -07001844int
Steve French50c2f752007-07-13 00:33:32 +00001845get_dfs_path(int xid, struct cifsSesInfo *pSesInfo, const char *old_path,
1846 const struct nls_table *nls_codepage, unsigned int *pnum_referrals,
Steve French366781c2008-01-25 10:12:41 +00001847 struct dfs_info3_param **preferrals, int remap)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001848{
1849 char *temp_unc;
1850 int rc = 0;
1851
1852 *pnum_referrals = 0;
Steve French366781c2008-01-25 10:12:41 +00001853 *preferrals = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001854
1855 if (pSesInfo->ipc_tid == 0) {
1856 temp_unc = kmalloc(2 /* for slashes */ +
Steve French50c2f752007-07-13 00:33:32 +00001857 strnlen(pSesInfo->serverName,
1858 SERVER_NAME_LEN_WITH_NULL * 2)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001859 + 1 + 4 /* slash IPC$ */ + 2,
1860 GFP_KERNEL);
1861 if (temp_unc == NULL)
1862 return -ENOMEM;
1863 temp_unc[0] = '\\';
1864 temp_unc[1] = '\\';
1865 strcpy(temp_unc + 2, pSesInfo->serverName);
1866 strcpy(temp_unc + 2 + strlen(pSesInfo->serverName), "\\IPC$");
1867 rc = CIFSTCon(xid, pSesInfo, temp_unc, NULL, nls_codepage);
Joe Perchesb6b38f72010-04-21 03:50:45 +00001868 cFYI(1, "CIFS Tcon rc = %d ipc_tid = %d", rc, pSesInfo->ipc_tid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001869 kfree(temp_unc);
1870 }
1871 if (rc == 0)
Steve Frenchc2cf07d2008-05-15 06:20:02 +00001872 rc = CIFSGetDFSRefer(xid, pSesInfo, old_path, preferrals,
Steve French737b7582005-04-28 22:41:06 -07001873 pnum_referrals, nls_codepage, remap);
Steve French366781c2008-01-25 10:12:41 +00001874 /* BB map targetUNCs to dfs_info3 structures, here or
1875 in CIFSGetDFSRefer BB */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001876
1877 return rc;
1878}
1879
Jeff Layton09e50d52008-07-23 10:11:19 -04001880#ifdef CONFIG_DEBUG_LOCK_ALLOC
1881static struct lock_class_key cifs_key[2];
1882static struct lock_class_key cifs_slock_key[2];
1883
1884static inline void
1885cifs_reclassify_socket4(struct socket *sock)
1886{
1887 struct sock *sk = sock->sk;
1888 BUG_ON(sock_owned_by_user(sk));
1889 sock_lock_init_class_and_name(sk, "slock-AF_INET-CIFS",
1890 &cifs_slock_key[0], "sk_lock-AF_INET-CIFS", &cifs_key[0]);
1891}
1892
1893static inline void
1894cifs_reclassify_socket6(struct socket *sock)
1895{
1896 struct sock *sk = sock->sk;
1897 BUG_ON(sock_owned_by_user(sk));
1898 sock_lock_init_class_and_name(sk, "slock-AF_INET6-CIFS",
1899 &cifs_slock_key[1], "sk_lock-AF_INET6-CIFS", &cifs_key[1]);
1900}
1901#else
1902static inline void
1903cifs_reclassify_socket4(struct socket *sock)
1904{
1905}
1906
1907static inline void
1908cifs_reclassify_socket6(struct socket *sock)
1909{
1910}
1911#endif
1912
Linus Torvalds1da177e2005-04-16 15:20:36 -07001913/* See RFC1001 section 14 on representation of Netbios names */
Steve French50c2f752007-07-13 00:33:32 +00001914static void rfc1002mangle(char *target, char *source, unsigned int length)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001915{
Steve French50c2f752007-07-13 00:33:32 +00001916 unsigned int i, j;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001917
Steve French50c2f752007-07-13 00:33:32 +00001918 for (i = 0, j = 0; i < (length); i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001919 /* mask a nibble at a time and encode */
1920 target[j] = 'A' + (0x0F & (source[i] >> 4));
1921 target[j+1] = 'A' + (0x0F & source[i]);
Steve French50c2f752007-07-13 00:33:32 +00001922 j += 2;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001923 }
1924
1925}
1926
1927
1928static int
Jeff Laytonbcf4b102008-12-01 18:42:15 -05001929ipv4_connect(struct TCP_Server_Info *server)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001930{
1931 int rc = 0;
Steve French6a5fa2362010-01-01 01:28:43 +00001932 int val;
Jeff Laytonbcf4b102008-12-01 18:42:15 -05001933 bool connected = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001934 __be16 orig_port = 0;
Jeff Laytonbcf4b102008-12-01 18:42:15 -05001935 struct socket *socket = server->ssocket;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001936
Jeff Laytonbcf4b102008-12-01 18:42:15 -05001937 if (socket == NULL) {
Steve French50c2f752007-07-13 00:33:32 +00001938 rc = sock_create_kern(PF_INET, SOCK_STREAM,
Jeff Laytonbcf4b102008-12-01 18:42:15 -05001939 IPPROTO_TCP, &socket);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001940 if (rc < 0) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00001941 cERROR(1, "Error %d creating socket", rc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001942 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001943 }
Jeff Laytonbcf4b102008-12-01 18:42:15 -05001944
1945 /* BB other socket options to set KEEPALIVE, NODELAY? */
Joe Perchesb6b38f72010-04-21 03:50:45 +00001946 cFYI(1, "Socket created");
Jeff Laytonbcf4b102008-12-01 18:42:15 -05001947 server->ssocket = socket;
1948 socket->sk->sk_allocation = GFP_NOFS;
1949 cifs_reclassify_socket4(socket);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001950 }
1951
Jeff Laytonbcf4b102008-12-01 18:42:15 -05001952 /* user overrode default port */
1953 if (server->addr.sockAddr.sin_port) {
1954 rc = socket->ops->connect(socket, (struct sockaddr *)
1955 &server->addr.sockAddr,
1956 sizeof(struct sockaddr_in), 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001957 if (rc >= 0)
Jeff Laytonbcf4b102008-12-01 18:42:15 -05001958 connected = true;
Steve French50c2f752007-07-13 00:33:32 +00001959 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001960
Steve Frenchfb8c4b12007-07-10 01:16:18 +00001961 if (!connected) {
Steve French50c2f752007-07-13 00:33:32 +00001962 /* save original port so we can retry user specified port
Linus Torvalds1da177e2005-04-16 15:20:36 -07001963 later if fall back ports fail this time */
Jeff Laytonbcf4b102008-12-01 18:42:15 -05001964 orig_port = server->addr.sockAddr.sin_port;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001965
1966 /* do not retry on the same port we just failed on */
Jeff Laytonbcf4b102008-12-01 18:42:15 -05001967 if (server->addr.sockAddr.sin_port != htons(CIFS_PORT)) {
1968 server->addr.sockAddr.sin_port = htons(CIFS_PORT);
1969 rc = socket->ops->connect(socket,
1970 (struct sockaddr *)
1971 &server->addr.sockAddr,
1972 sizeof(struct sockaddr_in), 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001973 if (rc >= 0)
Jeff Laytonbcf4b102008-12-01 18:42:15 -05001974 connected = true;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001975 }
1976 }
1977 if (!connected) {
Jeff Laytonbcf4b102008-12-01 18:42:15 -05001978 server->addr.sockAddr.sin_port = htons(RFC1001_PORT);
1979 rc = socket->ops->connect(socket, (struct sockaddr *)
1980 &server->addr.sockAddr,
Cyrill Gorcunov6345a3a2007-10-16 17:57:55 +00001981 sizeof(struct sockaddr_in), 0);
Steve French50c2f752007-07-13 00:33:32 +00001982 if (rc >= 0)
Jeff Laytonbcf4b102008-12-01 18:42:15 -05001983 connected = true;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001984 }
1985
1986 /* give up here - unless we want to retry on different
1987 protocol families some day */
1988 if (!connected) {
Steve Frenchfb8c4b12007-07-10 01:16:18 +00001989 if (orig_port)
Jeff Laytonbcf4b102008-12-01 18:42:15 -05001990 server->addr.sockAddr.sin_port = orig_port;
Joe Perchesb6b38f72010-04-21 03:50:45 +00001991 cFYI(1, "Error %d connecting to server via ipv4", rc);
Jeff Laytonbcf4b102008-12-01 18:42:15 -05001992 sock_release(socket);
1993 server->ssocket = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001994 return rc;
1995 }
Jeff Laytonbcf4b102008-12-01 18:42:15 -05001996
1997
1998 /*
1999 * Eventually check for other socket options to change from
2000 * the default. sock_setsockopt not used because it expects
2001 * user space buffer
2002 */
2003 socket->sk->sk_rcvtimeo = 7 * HZ;
Steve Frenchda505c32009-01-19 03:49:35 +00002004 socket->sk->sk_sndtimeo = 5 * HZ;
Steve Frenchedf1ae42008-10-29 00:47:57 +00002005
Steve Frenchb387eae2005-10-10 14:21:15 -07002006 /* make the bufsizes depend on wsize/rsize and max requests */
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002007 if (server->noautotune) {
2008 if (socket->sk->sk_sndbuf < (200 * 1024))
2009 socket->sk->sk_sndbuf = 200 * 1024;
2010 if (socket->sk->sk_rcvbuf < (140 * 1024))
2011 socket->sk->sk_rcvbuf = 140 * 1024;
Steve Frenchedf1ae42008-10-29 00:47:57 +00002012 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002013
Steve French6a5fa2362010-01-01 01:28:43 +00002014 if (server->tcp_nodelay) {
2015 val = 1;
2016 rc = kernel_setsockopt(socket, SOL_TCP, TCP_NODELAY,
2017 (char *)&val, sizeof(val));
2018 if (rc)
Joe Perchesb6b38f72010-04-21 03:50:45 +00002019 cFYI(1, "set TCP_NODELAY socket option error %d", rc);
Steve French6a5fa2362010-01-01 01:28:43 +00002020 }
2021
Joe Perchesb6b38f72010-04-21 03:50:45 +00002022 cFYI(1, "sndbuf %d rcvbuf %d rcvtimeo 0x%lx",
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002023 socket->sk->sk_sndbuf,
Joe Perchesb6b38f72010-04-21 03:50:45 +00002024 socket->sk->sk_rcvbuf, socket->sk->sk_rcvtimeo);
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002025
Linus Torvalds1da177e2005-04-16 15:20:36 -07002026 /* send RFC1001 sessinit */
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002027 if (server->addr.sockAddr.sin_port == htons(RFC1001_PORT)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002028 /* some servers require RFC1001 sessinit before sending
Steve French50c2f752007-07-13 00:33:32 +00002029 negprot - BB check reconnection in case where second
Linus Torvalds1da177e2005-04-16 15:20:36 -07002030 sessinit is sent but no second negprot */
Steve French50c2f752007-07-13 00:33:32 +00002031 struct rfc1002_session_packet *ses_init_buf;
2032 struct smb_hdr *smb_buf;
2033 ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet),
2034 GFP_KERNEL);
Steve Frenchfb8c4b12007-07-10 01:16:18 +00002035 if (ses_init_buf) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002036 ses_init_buf->trailer.session_req.called_len = 32;
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002037 if (server->server_RFC1001_name &&
2038 server->server_RFC1001_name[0] != 0)
Jeff Layton8ecaf672008-12-01 15:23:50 -05002039 rfc1002mangle(ses_init_buf->trailer.
2040 session_req.called_name,
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002041 server->server_RFC1001_name,
Jeff Layton8ecaf672008-12-01 15:23:50 -05002042 RFC1001_NAME_LEN_WITH_NULL);
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002043 else
Jeff Layton8ecaf672008-12-01 15:23:50 -05002044 rfc1002mangle(ses_init_buf->trailer.
2045 session_req.called_name,
2046 DEFAULT_CIFS_CALLED_NAME,
2047 RFC1001_NAME_LEN_WITH_NULL);
Steve Frencha10faeb22005-08-22 21:38:31 -07002048
Linus Torvalds1da177e2005-04-16 15:20:36 -07002049 ses_init_buf->trailer.session_req.calling_len = 32;
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002050
Linus Torvalds1da177e2005-04-16 15:20:36 -07002051 /* calling name ends in null (byte 16) from old smb
2052 convention. */
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002053 if (server->workstation_RFC1001_name &&
2054 server->workstation_RFC1001_name[0] != 0)
Jeff Layton8ecaf672008-12-01 15:23:50 -05002055 rfc1002mangle(ses_init_buf->trailer.
2056 session_req.calling_name,
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002057 server->workstation_RFC1001_name,
Jeff Layton8ecaf672008-12-01 15:23:50 -05002058 RFC1001_NAME_LEN_WITH_NULL);
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002059 else
Jeff Layton8ecaf672008-12-01 15:23:50 -05002060 rfc1002mangle(ses_init_buf->trailer.
2061 session_req.calling_name,
2062 "LINUX_CIFS_CLNT",
2063 RFC1001_NAME_LEN_WITH_NULL);
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002064
Linus Torvalds1da177e2005-04-16 15:20:36 -07002065 ses_init_buf->trailer.session_req.scope1 = 0;
2066 ses_init_buf->trailer.session_req.scope2 = 0;
2067 smb_buf = (struct smb_hdr *)ses_init_buf;
2068 /* sizeof RFC1002_SESSION_REQUEST with no scope */
2069 smb_buf->smb_buf_length = 0x81000044;
Jeff Layton0496e022008-12-30 12:39:16 -05002070 rc = smb_send(server, smb_buf, 0x44);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002071 kfree(ses_init_buf);
Steve French50c2f752007-07-13 00:33:32 +00002072 msleep(1); /* RFC1001 layer in at least one server
Steve French083d3a22006-03-03 09:53:36 +00002073 requires very short break before negprot
2074 presumably because not expecting negprot
2075 to follow so fast. This is a simple
Steve French50c2f752007-07-13 00:33:32 +00002076 solution that works without
Steve French083d3a22006-03-03 09:53:36 +00002077 complicating the code and causes no
2078 significant slowing down on mount
2079 for everyone else */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002080 }
Steve French50c2f752007-07-13 00:33:32 +00002081 /* else the negprot may still work without this
Linus Torvalds1da177e2005-04-16 15:20:36 -07002082 even though malloc failed */
Steve French50c2f752007-07-13 00:33:32 +00002083
Linus Torvalds1da177e2005-04-16 15:20:36 -07002084 }
Steve French50c2f752007-07-13 00:33:32 +00002085
Linus Torvalds1da177e2005-04-16 15:20:36 -07002086 return rc;
2087}
2088
2089static int
Jeff Laytond5c56052008-12-01 18:42:33 -05002090ipv6_connect(struct TCP_Server_Info *server)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002091{
2092 int rc = 0;
Steve French6a5fa2362010-01-01 01:28:43 +00002093 int val;
Jeff Laytond5c56052008-12-01 18:42:33 -05002094 bool connected = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002095 __be16 orig_port = 0;
Jeff Laytond5c56052008-12-01 18:42:33 -05002096 struct socket *socket = server->ssocket;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002097
Jeff Laytond5c56052008-12-01 18:42:33 -05002098 if (socket == NULL) {
Steve French50c2f752007-07-13 00:33:32 +00002099 rc = sock_create_kern(PF_INET6, SOCK_STREAM,
Jeff Laytond5c56052008-12-01 18:42:33 -05002100 IPPROTO_TCP, &socket);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002101 if (rc < 0) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00002102 cERROR(1, "Error %d creating ipv6 socket", rc);
Jeff Laytond5c56052008-12-01 18:42:33 -05002103 socket = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002104 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002105 }
Jeff Laytond5c56052008-12-01 18:42:33 -05002106
2107 /* BB other socket options to set KEEPALIVE, NODELAY? */
Joe Perchesb6b38f72010-04-21 03:50:45 +00002108 cFYI(1, "ipv6 Socket created");
Jeff Laytond5c56052008-12-01 18:42:33 -05002109 server->ssocket = socket;
2110 socket->sk->sk_allocation = GFP_NOFS;
2111 cifs_reclassify_socket6(socket);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002112 }
2113
Jeff Laytond5c56052008-12-01 18:42:33 -05002114 /* user overrode default port */
2115 if (server->addr.sockAddr6.sin6_port) {
2116 rc = socket->ops->connect(socket,
2117 (struct sockaddr *) &server->addr.sockAddr6,
Cyrill Gorcunov6345a3a2007-10-16 17:57:55 +00002118 sizeof(struct sockaddr_in6), 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002119 if (rc >= 0)
Jeff Laytond5c56052008-12-01 18:42:33 -05002120 connected = true;
Steve French50c2f752007-07-13 00:33:32 +00002121 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002122
Steve Frenchfb8c4b12007-07-10 01:16:18 +00002123 if (!connected) {
Steve French50c2f752007-07-13 00:33:32 +00002124 /* save original port so we can retry user specified port
Linus Torvalds1da177e2005-04-16 15:20:36 -07002125 later if fall back ports fail this time */
2126
Jeff Laytond5c56052008-12-01 18:42:33 -05002127 orig_port = server->addr.sockAddr6.sin6_port;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002128 /* do not retry on the same port we just failed on */
Jeff Laytond5c56052008-12-01 18:42:33 -05002129 if (server->addr.sockAddr6.sin6_port != htons(CIFS_PORT)) {
2130 server->addr.sockAddr6.sin6_port = htons(CIFS_PORT);
2131 rc = socket->ops->connect(socket, (struct sockaddr *)
2132 &server->addr.sockAddr6,
Cyrill Gorcunov6345a3a2007-10-16 17:57:55 +00002133 sizeof(struct sockaddr_in6), 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002134 if (rc >= 0)
Jeff Laytond5c56052008-12-01 18:42:33 -05002135 connected = true;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002136 }
2137 }
2138 if (!connected) {
Jeff Laytond5c56052008-12-01 18:42:33 -05002139 server->addr.sockAddr6.sin6_port = htons(RFC1001_PORT);
2140 rc = socket->ops->connect(socket, (struct sockaddr *)
2141 &server->addr.sockAddr6,
2142 sizeof(struct sockaddr_in6), 0);
Steve French50c2f752007-07-13 00:33:32 +00002143 if (rc >= 0)
Jeff Laytond5c56052008-12-01 18:42:33 -05002144 connected = true;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002145 }
2146
2147 /* give up here - unless we want to retry on different
2148 protocol families some day */
2149 if (!connected) {
Steve Frenchfb8c4b12007-07-10 01:16:18 +00002150 if (orig_port)
Jeff Laytond5c56052008-12-01 18:42:33 -05002151 server->addr.sockAddr6.sin6_port = orig_port;
Joe Perchesb6b38f72010-04-21 03:50:45 +00002152 cFYI(1, "Error %d connecting to server via ipv6", rc);
Jeff Laytond5c56052008-12-01 18:42:33 -05002153 sock_release(socket);
2154 server->ssocket = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002155 return rc;
2156 }
Steve Frenchedf1ae42008-10-29 00:47:57 +00002157
Jeff Laytond5c56052008-12-01 18:42:33 -05002158 /*
2159 * Eventually check for other socket options to change from
2160 * the default. sock_setsockopt not used because it expects
2161 * user space buffer
2162 */
2163 socket->sk->sk_rcvtimeo = 7 * HZ;
Steve Frenchda505c32009-01-19 03:49:35 +00002164 socket->sk->sk_sndtimeo = 5 * HZ;
Steve French6a5fa2362010-01-01 01:28:43 +00002165
2166 if (server->tcp_nodelay) {
2167 val = 1;
2168 rc = kernel_setsockopt(socket, SOL_TCP, TCP_NODELAY,
2169 (char *)&val, sizeof(val));
2170 if (rc)
Joe Perchesb6b38f72010-04-21 03:50:45 +00002171 cFYI(1, "set TCP_NODELAY socket option error %d", rc);
Steve French6a5fa2362010-01-01 01:28:43 +00002172 }
2173
Jeff Laytond5c56052008-12-01 18:42:33 -05002174 server->ssocket = socket;
Steve French50c2f752007-07-13 00:33:32 +00002175
Linus Torvalds1da177e2005-04-16 15:20:36 -07002176 return rc;
2177}
2178
Steve French50c2f752007-07-13 00:33:32 +00002179void reset_cifs_unix_caps(int xid, struct cifsTconInfo *tcon,
2180 struct super_block *sb, struct smb_vol *vol_info)
Steve French8af18972007-02-14 04:42:51 +00002181{
2182 /* if we are reconnecting then should we check to see if
2183 * any requested capabilities changed locally e.g. via
2184 * remount but we can not do much about it here
2185 * if they have (even if we could detect it by the following)
2186 * Perhaps we could add a backpointer to array of sb from tcon
2187 * or if we change to make all sb to same share the same
2188 * sb as NFS - then we only have one backpointer to sb.
2189 * What if we wanted to mount the server share twice once with
2190 * and once without posixacls or posix paths? */
2191 __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
Steve French50c2f752007-07-13 00:33:32 +00002192
Steve Frenchc18c8422007-07-18 23:21:09 +00002193 if (vol_info && vol_info->no_linux_ext) {
2194 tcon->fsUnixInfo.Capability = 0;
2195 tcon->unix_ext = 0; /* Unix Extensions disabled */
Joe Perchesb6b38f72010-04-21 03:50:45 +00002196 cFYI(1, "Linux protocol extensions disabled");
Steve Frenchc18c8422007-07-18 23:21:09 +00002197 return;
2198 } else if (vol_info)
2199 tcon->unix_ext = 1; /* Unix Extensions supported */
2200
2201 if (tcon->unix_ext == 0) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00002202 cFYI(1, "Unix extensions disabled so not set on reconnect");
Steve Frenchc18c8422007-07-18 23:21:09 +00002203 return;
2204 }
Steve French50c2f752007-07-13 00:33:32 +00002205
Steve Frenchfb8c4b12007-07-10 01:16:18 +00002206 if (!CIFSSMBQFSUnixInfo(xid, tcon)) {
Steve French8af18972007-02-14 04:42:51 +00002207 __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
Steve French50c2f752007-07-13 00:33:32 +00002208
Steve French8af18972007-02-14 04:42:51 +00002209 /* check for reconnect case in which we do not
2210 want to change the mount behavior if we can avoid it */
Steve Frenchfb8c4b12007-07-10 01:16:18 +00002211 if (vol_info == NULL) {
Steve French50c2f752007-07-13 00:33:32 +00002212 /* turn off POSIX ACL and PATHNAMES if not set
Steve French8af18972007-02-14 04:42:51 +00002213 originally at mount time */
2214 if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0)
2215 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
Igor Mammedov11b6d642008-02-15 19:06:04 +00002216 if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
2217 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
Joe Perchesb6b38f72010-04-21 03:50:45 +00002218 cERROR(1, "POSIXPATH support change");
Steve French8af18972007-02-14 04:42:51 +00002219 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
Igor Mammedov11b6d642008-02-15 19:06:04 +00002220 } else if ((cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00002221 cERROR(1, "possible reconnect error");
2222 cERROR(1, "server disabled POSIX path support");
Igor Mammedov11b6d642008-02-15 19:06:04 +00002223 }
Steve French8af18972007-02-14 04:42:51 +00002224 }
Steve French50c2f752007-07-13 00:33:32 +00002225
Steve French8af18972007-02-14 04:42:51 +00002226 cap &= CIFS_UNIX_CAP_MASK;
Steve French75865f8c2007-06-24 18:30:48 +00002227 if (vol_info && vol_info->no_psx_acl)
Steve French8af18972007-02-14 04:42:51 +00002228 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
Steve French75865f8c2007-06-24 18:30:48 +00002229 else if (CIFS_UNIX_POSIX_ACL_CAP & cap) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00002230 cFYI(1, "negotiated posix acl support");
Steve Frenchfb8c4b12007-07-10 01:16:18 +00002231 if (sb)
Steve French8af18972007-02-14 04:42:51 +00002232 sb->s_flags |= MS_POSIXACL;
2233 }
2234
Steve French75865f8c2007-06-24 18:30:48 +00002235 if (vol_info && vol_info->posix_paths == 0)
Steve French8af18972007-02-14 04:42:51 +00002236 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
Steve French75865f8c2007-06-24 18:30:48 +00002237 else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00002238 cFYI(1, "negotiate posix pathnames");
Steve French75865f8c2007-06-24 18:30:48 +00002239 if (sb)
Steve French50c2f752007-07-13 00:33:32 +00002240 CIFS_SB(sb)->mnt_cifs_flags |=
Steve French8af18972007-02-14 04:42:51 +00002241 CIFS_MOUNT_POSIX_PATHS;
2242 }
Steve French50c2f752007-07-13 00:33:32 +00002243
Steve French984acfe2007-04-26 16:42:50 +00002244 /* We might be setting the path sep back to a different
2245 form if we are reconnecting and the server switched its
Steve French50c2f752007-07-13 00:33:32 +00002246 posix path capability for this share */
Steve French75865f8c2007-06-24 18:30:48 +00002247 if (sb && (CIFS_SB(sb)->prepathlen > 0))
Steve French984acfe2007-04-26 16:42:50 +00002248 CIFS_SB(sb)->prepath[0] = CIFS_DIR_SEP(CIFS_SB(sb));
Steve French75865f8c2007-06-24 18:30:48 +00002249
2250 if (sb && (CIFS_SB(sb)->rsize > 127 * 1024)) {
2251 if ((cap & CIFS_UNIX_LARGE_READ_CAP) == 0) {
2252 CIFS_SB(sb)->rsize = 127 * 1024;
Joe Perchesb6b38f72010-04-21 03:50:45 +00002253 cFYI(DBG2, "larger reads not supported by srv");
Steve French75865f8c2007-06-24 18:30:48 +00002254 }
2255 }
Steve French50c2f752007-07-13 00:33:32 +00002256
2257
Joe Perchesb6b38f72010-04-21 03:50:45 +00002258 cFYI(1, "Negotiate caps 0x%x", (int)cap);
Steve French8af18972007-02-14 04:42:51 +00002259#ifdef CONFIG_CIFS_DEBUG2
Steve French75865f8c2007-06-24 18:30:48 +00002260 if (cap & CIFS_UNIX_FCNTL_CAP)
Joe Perchesb6b38f72010-04-21 03:50:45 +00002261 cFYI(1, "FCNTL cap");
Steve French75865f8c2007-06-24 18:30:48 +00002262 if (cap & CIFS_UNIX_EXTATTR_CAP)
Joe Perchesb6b38f72010-04-21 03:50:45 +00002263 cFYI(1, "EXTATTR cap");
Steve French75865f8c2007-06-24 18:30:48 +00002264 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
Joe Perchesb6b38f72010-04-21 03:50:45 +00002265 cFYI(1, "POSIX path cap");
Steve French75865f8c2007-06-24 18:30:48 +00002266 if (cap & CIFS_UNIX_XATTR_CAP)
Joe Perchesb6b38f72010-04-21 03:50:45 +00002267 cFYI(1, "XATTR cap");
Steve French75865f8c2007-06-24 18:30:48 +00002268 if (cap & CIFS_UNIX_POSIX_ACL_CAP)
Joe Perchesb6b38f72010-04-21 03:50:45 +00002269 cFYI(1, "POSIX ACL cap");
Steve French75865f8c2007-06-24 18:30:48 +00002270 if (cap & CIFS_UNIX_LARGE_READ_CAP)
Joe Perchesb6b38f72010-04-21 03:50:45 +00002271 cFYI(1, "very large read cap");
Steve French75865f8c2007-06-24 18:30:48 +00002272 if (cap & CIFS_UNIX_LARGE_WRITE_CAP)
Joe Perchesb6b38f72010-04-21 03:50:45 +00002273 cFYI(1, "very large write cap");
Steve French8af18972007-02-14 04:42:51 +00002274#endif /* CIFS_DEBUG2 */
2275 if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) {
Steve French442aa312007-09-24 20:25:46 +00002276 if (vol_info == NULL) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00002277 cFYI(1, "resetting capabilities failed");
Steve French442aa312007-09-24 20:25:46 +00002278 } else
Joe Perchesb6b38f72010-04-21 03:50:45 +00002279 cERROR(1, "Negotiating Unix capabilities "
Steve French5a44b312007-09-20 15:16:24 +00002280 "with the server failed. Consider "
2281 "mounting with the Unix Extensions\n"
2282 "disabled, if problems are found, "
2283 "by specifying the nounix mount "
Joe Perchesb6b38f72010-04-21 03:50:45 +00002284 "option.");
Steve French5a44b312007-09-20 15:16:24 +00002285
Steve French8af18972007-02-14 04:42:51 +00002286 }
2287 }
2288}
2289
Steve French03a143c2008-02-14 06:38:30 +00002290static void
2291convert_delimiter(char *path, char delim)
2292{
2293 int i;
Steve Frenchc2d68ea2008-02-15 19:20:18 +00002294 char old_delim;
Steve French03a143c2008-02-14 06:38:30 +00002295
2296 if (path == NULL)
2297 return;
2298
Steve French582d21e2008-05-13 04:54:12 +00002299 if (delim == '/')
Steve Frenchc2d68ea2008-02-15 19:20:18 +00002300 old_delim = '\\';
2301 else
2302 old_delim = '/';
2303
Steve French03a143c2008-02-14 06:38:30 +00002304 for (i = 0; path[i] != '\0'; i++) {
Steve Frenchc2d68ea2008-02-15 19:20:18 +00002305 if (path[i] == old_delim)
Steve French03a143c2008-02-14 06:38:30 +00002306 path[i] = delim;
2307 }
2308}
2309
Steve French3b795212008-11-13 19:45:32 +00002310static void setup_cifs_sb(struct smb_vol *pvolume_info,
2311 struct cifs_sb_info *cifs_sb)
Jeff Laytonb1c8d2b2008-10-22 13:57:07 -04002312{
Steve French3b795212008-11-13 19:45:32 +00002313 if (pvolume_info->rsize > CIFSMaxBufSize) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00002314 cERROR(1, "rsize %d too large, using MaxBufSize",
2315 pvolume_info->rsize);
Steve French3b795212008-11-13 19:45:32 +00002316 cifs_sb->rsize = CIFSMaxBufSize;
2317 } else if ((pvolume_info->rsize) &&
2318 (pvolume_info->rsize <= CIFSMaxBufSize))
2319 cifs_sb->rsize = pvolume_info->rsize;
2320 else /* default */
2321 cifs_sb->rsize = CIFSMaxBufSize;
Jeff Laytonb1c8d2b2008-10-22 13:57:07 -04002322
Steve French3b795212008-11-13 19:45:32 +00002323 if (pvolume_info->wsize > PAGEVEC_SIZE * PAGE_CACHE_SIZE) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00002324 cERROR(1, "wsize %d too large, using 4096 instead",
2325 pvolume_info->wsize);
Steve French3b795212008-11-13 19:45:32 +00002326 cifs_sb->wsize = 4096;
2327 } else if (pvolume_info->wsize)
2328 cifs_sb->wsize = pvolume_info->wsize;
2329 else
2330 cifs_sb->wsize = min_t(const int,
2331 PAGEVEC_SIZE * PAGE_CACHE_SIZE,
2332 127*1024);
2333 /* old default of CIFSMaxBufSize was too small now
2334 that SMB Write2 can send multiple pages in kvec.
2335 RFC1001 does not describe what happens when frame
2336 bigger than 128K is sent so use that as max in
2337 conjunction with 52K kvec constraint on arch with 4K
2338 page size */
2339
2340 if (cifs_sb->rsize < 2048) {
2341 cifs_sb->rsize = 2048;
2342 /* Windows ME may prefer this */
Joe Perchesb6b38f72010-04-21 03:50:45 +00002343 cFYI(1, "readsize set to minimum: 2048");
Steve French3b795212008-11-13 19:45:32 +00002344 }
2345 /* calculate prepath */
2346 cifs_sb->prepath = pvolume_info->prepath;
2347 if (cifs_sb->prepath) {
2348 cifs_sb->prepathlen = strlen(cifs_sb->prepath);
2349 /* we can not convert the / to \ in the path
2350 separators in the prefixpath yet because we do not
2351 know (until reset_cifs_unix_caps is called later)
2352 whether POSIX PATH CAP is available. We normalize
2353 the / to \ after reset_cifs_unix_caps is called */
2354 pvolume_info->prepath = NULL;
2355 } else
2356 cifs_sb->prepathlen = 0;
2357 cifs_sb->mnt_uid = pvolume_info->linux_uid;
2358 cifs_sb->mnt_gid = pvolume_info->linux_gid;
2359 cifs_sb->mnt_file_mode = pvolume_info->file_mode;
2360 cifs_sb->mnt_dir_mode = pvolume_info->dir_mode;
Joe Perchesb6b38f72010-04-21 03:50:45 +00002361 cFYI(1, "file mode: 0x%x dir mode: 0x%x",
2362 cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode);
Steve French3b795212008-11-13 19:45:32 +00002363
2364 if (pvolume_info->noperm)
2365 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM;
2366 if (pvolume_info->setuids)
2367 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID;
2368 if (pvolume_info->server_ino)
2369 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM;
2370 if (pvolume_info->remap)
2371 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR;
2372 if (pvolume_info->no_xattr)
2373 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR;
2374 if (pvolume_info->sfu_emul)
2375 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL;
2376 if (pvolume_info->nobrl)
2377 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL;
Steve Frenchbe652442009-02-23 15:21:59 +00002378 if (pvolume_info->nostrictsync)
Steve French4717bed2009-02-24 14:44:19 +00002379 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOSSYNC;
Steve French13a6e422008-12-02 17:24:33 +00002380 if (pvolume_info->mand_lock)
2381 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL;
Steve French3b795212008-11-13 19:45:32 +00002382 if (pvolume_info->cifs_acl)
2383 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL;
2384 if (pvolume_info->override_uid)
2385 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID;
2386 if (pvolume_info->override_gid)
2387 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID;
2388 if (pvolume_info->dynperm)
2389 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM;
2390 if (pvolume_info->direct_io) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00002391 cFYI(1, "mounting share using direct i/o");
Steve French3b795212008-11-13 19:45:32 +00002392 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO;
2393 }
2394
2395 if ((pvolume_info->cifs_acl) && (pvolume_info->dynperm))
Joe Perchesb6b38f72010-04-21 03:50:45 +00002396 cERROR(1, "mount option dynperm ignored if cifsacl "
2397 "mount option supported");
Jeff Laytonb1c8d2b2008-10-22 13:57:07 -04002398}
2399
Igor Mammedove4cce942009-02-10 14:10:26 +03002400static int
2401is_path_accessible(int xid, struct cifsTconInfo *tcon,
2402 struct cifs_sb_info *cifs_sb, const char *full_path)
2403{
2404 int rc;
Igor Mammedove4cce942009-02-10 14:10:26 +03002405 FILE_ALL_INFO *pfile_info;
2406
Igor Mammedove4cce942009-02-10 14:10:26 +03002407 pfile_info = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
2408 if (pfile_info == NULL)
2409 return -ENOMEM;
2410
2411 rc = CIFSSMBQPathInfo(xid, tcon, full_path, pfile_info,
2412 0 /* not legacy */, cifs_sb->local_nls,
2413 cifs_sb->mnt_cifs_flags &
2414 CIFS_MOUNT_MAP_SPECIAL_CHR);
2415 kfree(pfile_info);
2416 return rc;
2417}
2418
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002419static void
2420cleanup_volume_info(struct smb_vol **pvolume_info)
2421{
2422 struct smb_vol *volume_info;
2423
Dan Carpenterad6cca62010-04-26 12:10:06 +02002424 if (!pvolume_info || !*pvolume_info)
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002425 return;
2426
2427 volume_info = *pvolume_info;
2428 kzfree(volume_info->password);
2429 kfree(volume_info->UNC);
2430 kfree(volume_info->prepath);
2431 kfree(volume_info);
2432 *pvolume_info = NULL;
2433 return;
2434}
2435
Steve French2d6d5892009-04-09 00:36:44 +00002436#ifdef CONFIG_CIFS_DFS_UPCALL
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002437/* build_path_to_root returns full path to root when
2438 * we do not have an exiting connection (tcon) */
2439static char *
2440build_unc_path_to_root(const struct smb_vol *volume_info,
2441 const struct cifs_sb_info *cifs_sb)
2442{
2443 char *full_path;
2444
2445 int unc_len = strnlen(volume_info->UNC, MAX_TREE_SIZE + 1);
2446 full_path = kmalloc(unc_len + cifs_sb->prepathlen + 1, GFP_KERNEL);
2447 if (full_path == NULL)
2448 return ERR_PTR(-ENOMEM);
2449
2450 strncpy(full_path, volume_info->UNC, unc_len);
2451 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) {
2452 int i;
2453 for (i = 0; i < unc_len; i++) {
2454 if (full_path[i] == '\\')
2455 full_path[i] = '/';
2456 }
2457 }
2458
2459 if (cifs_sb->prepathlen)
2460 strncpy(full_path + unc_len, cifs_sb->prepath,
2461 cifs_sb->prepathlen);
2462
2463 full_path[unc_len + cifs_sb->prepathlen] = 0; /* add trailing null */
2464 return full_path;
2465}
Steve French2d6d5892009-04-09 00:36:44 +00002466#endif
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002467
Linus Torvalds1da177e2005-04-16 15:20:36 -07002468int
2469cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002470 char *mount_data_global, const char *devname)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002471{
Jeff Laytona2934c72009-12-03 08:09:41 -05002472 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002473 int xid;
Jeff Layton7586b762008-12-01 18:41:49 -05002474 struct smb_vol *volume_info;
Jeff Laytona2934c72009-12-03 08:09:41 -05002475 struct cifsSesInfo *pSesInfo;
2476 struct cifsTconInfo *tcon;
2477 struct TCP_Server_Info *srvTcp;
Igor Mammedove4cce942009-02-10 14:10:26 +03002478 char *full_path;
Steve French2d6d5892009-04-09 00:36:44 +00002479 char *mount_data = mount_data_global;
2480#ifdef CONFIG_CIFS_DFS_UPCALL
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002481 struct dfs_info3_param *referrals = NULL;
2482 unsigned int num_referrals = 0;
Igor Mammedov5c2503a2009-04-21 19:31:05 +04002483 int referral_walks_count = 0;
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002484try_mount_again:
Steve French2d6d5892009-04-09 00:36:44 +00002485#endif
Jeff Laytona2934c72009-12-03 08:09:41 -05002486 rc = 0;
2487 tcon = NULL;
2488 pSesInfo = NULL;
2489 srvTcp = NULL;
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002490 full_path = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002491
2492 xid = GetXid();
2493
Jeff Layton7586b762008-12-01 18:41:49 -05002494 volume_info = kzalloc(sizeof(struct smb_vol), GFP_KERNEL);
2495 if (!volume_info) {
2496 rc = -ENOMEM;
2497 goto out;
2498 }
Steve French50c2f752007-07-13 00:33:32 +00002499
Jeff Layton7586b762008-12-01 18:41:49 -05002500 if (cifs_parse_mount_options(mount_data, devname, volume_info)) {
Jeff Layton70fe7dc2007-11-16 22:21:07 +00002501 rc = -EINVAL;
2502 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002503 }
2504
Jeff Layton7586b762008-12-01 18:41:49 -05002505 if (volume_info->nullauth) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00002506 cFYI(1, "null user");
Jeff Layton7586b762008-12-01 18:41:49 -05002507 volume_info->username = "";
2508 } else if (volume_info->username) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002509 /* BB fixme parse for domain name here */
Joe Perchesb6b38f72010-04-21 03:50:45 +00002510 cFYI(1, "Username: %s", volume_info->username);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002511 } else {
Steve Frenchbf820672005-12-01 22:32:42 -08002512 cifserror("No username specified");
Steve French50c2f752007-07-13 00:33:32 +00002513 /* In userspace mount helper we can get user name from alternate
2514 locations such as env variables and files on disk */
Jeff Layton70fe7dc2007-11-16 22:21:07 +00002515 rc = -EINVAL;
2516 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002517 }
2518
Linus Torvalds1da177e2005-04-16 15:20:36 -07002519 /* this is needed for ASCII cp to Unicode converts */
Jeff Layton7586b762008-12-01 18:41:49 -05002520 if (volume_info->iocharset == NULL) {
Jeff Laytona5fc4ce2010-04-24 07:57:42 -04002521 /* load_nls_default cannot return null */
2522 volume_info->local_nls = load_nls_default();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002523 } else {
Jeff Laytona5fc4ce2010-04-24 07:57:42 -04002524 volume_info->local_nls = load_nls(volume_info->iocharset);
2525 if (volume_info->local_nls == NULL) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00002526 cERROR(1, "CIFS mount error: iocharset %s not found",
2527 volume_info->iocharset);
Jeff Layton70fe7dc2007-11-16 22:21:07 +00002528 rc = -ELIBACC;
2529 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002530 }
2531 }
Jeff Laytona5fc4ce2010-04-24 07:57:42 -04002532 cifs_sb->local_nls = volume_info->local_nls;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002533
Jeff Layton63c038c2008-12-01 18:41:46 -05002534 /* get a reference to a tcp session */
Jeff Layton7586b762008-12-01 18:41:49 -05002535 srvTcp = cifs_get_tcp_session(volume_info);
Jeff Layton63c038c2008-12-01 18:41:46 -05002536 if (IS_ERR(srvTcp)) {
2537 rc = PTR_ERR(srvTcp);
2538 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002539 }
2540
Jeff Layton36988c72010-04-24 07:57:43 -04002541 /* get a reference to a SMB session */
2542 pSesInfo = cifs_get_smb_ses(srvTcp, volume_info);
2543 if (IS_ERR(pSesInfo)) {
2544 rc = PTR_ERR(pSesInfo);
2545 pSesInfo = NULL;
2546 goto mount_fail_check;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002547 }
Steve French50c2f752007-07-13 00:33:32 +00002548
Jeff Laytond00c28d2010-04-24 07:57:44 -04002549 setup_cifs_sb(volume_info, cifs_sb);
2550 if (pSesInfo->capabilities & CAP_LARGE_FILES)
2551 sb->s_maxbytes = MAX_LFS_FILESIZE;
2552 else
2553 sb->s_maxbytes = MAX_NON_LFS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002554
Steve French8af18972007-02-14 04:42:51 +00002555 /* BB FIXME fix time_gran to be larger for LANMAN sessions */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002556 sb->s_time_gran = 100;
2557
Jeff Laytond00c28d2010-04-24 07:57:44 -04002558 /* search for existing tcon to this server share */
2559 tcon = cifs_get_tcon(pSesInfo, volume_info);
2560 if (IS_ERR(tcon)) {
2561 rc = PTR_ERR(tcon);
2562 tcon = NULL;
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002563 goto remote_path_check;
Jeff Laytond00c28d2010-04-24 07:57:44 -04002564 }
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002565
Steve Frenchd82c2df2008-11-15 00:07:26 +00002566 cifs_sb->tcon = tcon;
Steve Frenchd82c2df2008-11-15 00:07:26 +00002567
2568 /* do not care if following two calls succeed - informational */
2569 if (!tcon->ipc) {
2570 CIFSSMBQFSDeviceInfo(xid, tcon);
2571 CIFSSMBQFSAttributeInfo(xid, tcon);
2572 }
2573
2574 /* tell server which Unix caps we support */
2575 if (tcon->ses->capabilities & CAP_UNIX)
2576 /* reset of caps checks mount to see if unix extensions
2577 disabled for just this mount */
Jeff Layton7586b762008-12-01 18:41:49 -05002578 reset_cifs_unix_caps(xid, tcon, sb, volume_info);
Steve Frenchd82c2df2008-11-15 00:07:26 +00002579 else
2580 tcon->unix_ext = 0; /* server does not support them */
2581
2582 /* convert forward to back slashes in prepath here if needed */
2583 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) == 0)
2584 convert_delimiter(cifs_sb->prepath, CIFS_DIR_SEP(cifs_sb));
2585
2586 if ((tcon->unix_ext == 0) && (cifs_sb->rsize > (1024 * 127))) {
2587 cifs_sb->rsize = 1024 * 127;
Joe Perchesb6b38f72010-04-21 03:50:45 +00002588 cFYI(DBG2, "no very large read support, rsize now 127K");
Steve Frenchd82c2df2008-11-15 00:07:26 +00002589 }
2590 if (!(tcon->ses->capabilities & CAP_LARGE_WRITE_X))
2591 cifs_sb->wsize = min(cifs_sb->wsize,
2592 (tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE));
2593 if (!(tcon->ses->capabilities & CAP_LARGE_READ_X))
2594 cifs_sb->rsize = min(cifs_sb->rsize,
2595 (tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002596
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002597remote_path_check:
2598 /* check if a whole path (including prepath) is not remote */
2599 if (!rc && cifs_sb->prepathlen && tcon) {
Igor Mammedove4cce942009-02-10 14:10:26 +03002600 /* build_path_to_root works only when we have a valid tcon */
2601 full_path = cifs_build_path_to_root(cifs_sb);
2602 if (full_path == NULL) {
2603 rc = -ENOMEM;
2604 goto mount_fail_check;
2605 }
2606 rc = is_path_accessible(xid, tcon, cifs_sb, full_path);
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002607 if (rc != -EREMOTE) {
Igor Mammedove4cce942009-02-10 14:10:26 +03002608 kfree(full_path);
2609 goto mount_fail_check;
2610 }
2611 kfree(full_path);
2612 }
2613
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002614 /* get referral if needed */
2615 if (rc == -EREMOTE) {
Steve Frenchd036f502009-04-03 03:12:08 +00002616#ifdef CONFIG_CIFS_DFS_UPCALL
Igor Mammedov5c2503a2009-04-21 19:31:05 +04002617 if (referral_walks_count > MAX_NESTED_LINKS) {
2618 /*
2619 * BB: when we implement proper loop detection,
2620 * we will remove this check. But now we need it
2621 * to prevent an indefinite loop if 'DFS tree' is
2622 * misconfigured (i.e. has loops).
2623 */
2624 rc = -ELOOP;
2625 goto mount_fail_check;
2626 }
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002627 /* convert forward to back slashes in prepath here if needed */
2628 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) == 0)
2629 convert_delimiter(cifs_sb->prepath,
2630 CIFS_DIR_SEP(cifs_sb));
2631 full_path = build_unc_path_to_root(volume_info, cifs_sb);
2632 if (IS_ERR(full_path)) {
2633 rc = PTR_ERR(full_path);
2634 goto mount_fail_check;
2635 }
2636
Joe Perchesb6b38f72010-04-21 03:50:45 +00002637 cFYI(1, "Getting referral for: %s", full_path);
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002638 rc = get_dfs_path(xid, pSesInfo , full_path + 1,
2639 cifs_sb->local_nls, &num_referrals, &referrals,
2640 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
2641 if (!rc && num_referrals > 0) {
2642 char *fake_devname = NULL;
2643
2644 if (mount_data != mount_data_global)
2645 kfree(mount_data);
Jeff Layton7b91e262009-07-23 15:22:30 -04002646
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002647 mount_data = cifs_compose_mount_options(
2648 cifs_sb->mountdata, full_path + 1,
2649 referrals, &fake_devname);
Jeff Layton7b91e262009-07-23 15:22:30 -04002650
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002651 free_dfs_info_array(referrals, num_referrals);
Jeff Layton7b91e262009-07-23 15:22:30 -04002652 kfree(fake_devname);
2653 kfree(full_path);
2654
2655 if (IS_ERR(mount_data)) {
2656 rc = PTR_ERR(mount_data);
2657 mount_data = NULL;
2658 goto mount_fail_check;
2659 }
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002660
2661 if (tcon)
2662 cifs_put_tcon(tcon);
2663 else if (pSesInfo)
2664 cifs_put_smb_ses(pSesInfo);
2665
2666 cleanup_volume_info(&volume_info);
Igor Mammedov5c2503a2009-04-21 19:31:05 +04002667 referral_walks_count++;
Jeff Laytona2934c72009-12-03 08:09:41 -05002668 FreeXid(xid);
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002669 goto try_mount_again;
2670 }
Steve Frenchd036f502009-04-03 03:12:08 +00002671#else /* No DFS support, return error on mount */
2672 rc = -EOPNOTSUPP;
2673#endif
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002674 }
2675
2676mount_fail_check:
2677 /* on error free sesinfo and tcon struct if needed */
2678 if (rc) {
2679 if (mount_data != mount_data_global)
2680 kfree(mount_data);
2681 /* If find_unc succeeded then rc == 0 so we can not end */
2682 /* up accidently freeing someone elses tcon struct */
2683 if (tcon)
2684 cifs_put_tcon(tcon);
2685 else if (pSesInfo)
2686 cifs_put_smb_ses(pSesInfo);
2687 else
2688 cifs_put_tcp_session(srvTcp);
2689 goto out;
2690 }
2691
Jeff Layton7586b762008-12-01 18:41:49 -05002692 /* volume_info->password is freed above when existing session found
Linus Torvalds1da177e2005-04-16 15:20:36 -07002693 (in which case it is not needed anymore) but when new sesion is created
2694 the password ptr is put in the new session structure (in which case the
2695 password will be freed at unmount time) */
Jeff Layton70fe7dc2007-11-16 22:21:07 +00002696out:
2697 /* zero out password before freeing */
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002698 cleanup_volume_info(&volume_info);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002699 FreeXid(xid);
2700 return rc;
2701}
2702
Linus Torvalds1da177e2005-04-16 15:20:36 -07002703int
2704CIFSTCon(unsigned int xid, struct cifsSesInfo *ses,
2705 const char *tree, struct cifsTconInfo *tcon,
2706 const struct nls_table *nls_codepage)
2707{
2708 struct smb_hdr *smb_buffer;
2709 struct smb_hdr *smb_buffer_response;
2710 TCONX_REQ *pSMB;
2711 TCONX_RSP *pSMBr;
2712 unsigned char *bcc_ptr;
2713 int rc = 0;
Jeff Laytoncc20c032009-04-30 07:16:21 -04002714 int length, bytes_left;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002715 __u16 count;
2716
2717 if (ses == NULL)
2718 return -EIO;
2719
2720 smb_buffer = cifs_buf_get();
Steve Frenchca43e3b2009-09-01 17:20:50 +00002721 if (smb_buffer == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002722 return -ENOMEM;
Steve Frenchca43e3b2009-09-01 17:20:50 +00002723
Linus Torvalds1da177e2005-04-16 15:20:36 -07002724 smb_buffer_response = smb_buffer;
2725
2726 header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX,
2727 NULL /*no tid */ , 4 /*wct */ );
Steve French1982c342005-08-17 12:38:22 -07002728
2729 smb_buffer->Mid = GetNextMid(ses->server);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002730 smb_buffer->Uid = ses->Suid;
2731 pSMB = (TCONX_REQ *) smb_buffer;
2732 pSMBr = (TCONX_RSP *) smb_buffer_response;
2733
2734 pSMB->AndXCommand = 0xFF;
2735 pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002736 bcc_ptr = &pSMB->Password[0];
Steve Frenchfb8c4b12007-07-10 01:16:18 +00002737 if ((ses->server->secMode) & SECMODE_USER) {
Steve Frencheeac8042006-01-13 21:34:58 -08002738 pSMB->PasswordLength = cpu_to_le16(1); /* minimum */
Steve French7c7b25b2006-06-01 19:20:10 +00002739 *bcc_ptr = 0; /* password is null byte */
Steve Frencheeac8042006-01-13 21:34:58 -08002740 bcc_ptr++; /* skip password */
Steve French7c7b25b2006-06-01 19:20:10 +00002741 /* already aligned so no need to do it below */
Steve Frencheeac8042006-01-13 21:34:58 -08002742 } else {
Steve French7c7b25b2006-06-01 19:20:10 +00002743 pSMB->PasswordLength = cpu_to_le16(CIFS_SESS_KEY_SIZE);
Steve Frencheeac8042006-01-13 21:34:58 -08002744 /* BB FIXME add code to fail this if NTLMv2 or Kerberos
2745 specified as required (when that support is added to
2746 the vfs in the future) as only NTLM or the much
Steve French7c7b25b2006-06-01 19:20:10 +00002747 weaker LANMAN (which we do not send by default) is accepted
Steve Frencheeac8042006-01-13 21:34:58 -08002748 by Samba (not sure whether other servers allow
2749 NTLMv2 password here) */
Steve French7c7b25b2006-06-01 19:20:10 +00002750#ifdef CONFIG_CIFS_WEAK_PW_HASH
Jeff Layton04912d62010-04-24 07:57:45 -04002751 if ((global_secflags & CIFSSEC_MAY_LANMAN) &&
Jeff Layton00e485b2008-12-05 20:41:21 -05002752 (ses->server->secType == LANMAN))
2753 calc_lanman_hash(tcon->password, ses->server->cryptKey,
Jeff Layton4e53a3f2008-12-05 20:41:21 -05002754 ses->server->secMode &
2755 SECMODE_PW_ENCRYPT ? true : false,
2756 bcc_ptr);
Steve French7c7b25b2006-06-01 19:20:10 +00002757 else
2758#endif /* CIFS_WEAK_PW_HASH */
Jeff Layton00e485b2008-12-05 20:41:21 -05002759 SMBNTencrypt(tcon->password, ses->server->cryptKey,
Steve Frencheeac8042006-01-13 21:34:58 -08002760 bcc_ptr);
2761
Steve French7c7b25b2006-06-01 19:20:10 +00002762 bcc_ptr += CIFS_SESS_KEY_SIZE;
Steve Frenchfb8c4b12007-07-10 01:16:18 +00002763 if (ses->capabilities & CAP_UNICODE) {
Steve French7c7b25b2006-06-01 19:20:10 +00002764 /* must align unicode strings */
2765 *bcc_ptr = 0; /* null byte password */
2766 bcc_ptr++;
2767 }
Steve Frencheeac8042006-01-13 21:34:58 -08002768 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002769
Steve French50c2f752007-07-13 00:33:32 +00002770 if (ses->server->secMode &
Steve Frencha878fb22006-05-30 18:04:19 +00002771 (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002772 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2773
2774 if (ses->capabilities & CAP_STATUS32) {
2775 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2776 }
2777 if (ses->capabilities & CAP_DFS) {
2778 smb_buffer->Flags2 |= SMBFLG2_DFS;
2779 }
2780 if (ses->capabilities & CAP_UNICODE) {
2781 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2782 length =
Steve French50c2f752007-07-13 00:33:32 +00002783 cifs_strtoUCS((__le16 *) bcc_ptr, tree,
2784 6 /* max utf8 char length in bytes */ *
Steve Frencha878fb22006-05-30 18:04:19 +00002785 (/* server len*/ + 256 /* share len */), nls_codepage);
2786 bcc_ptr += 2 * length; /* convert num 16 bit words to bytes */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002787 bcc_ptr += 2; /* skip trailing null */
2788 } else { /* ASCII */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002789 strcpy(bcc_ptr, tree);
2790 bcc_ptr += strlen(tree) + 1;
2791 }
2792 strcpy(bcc_ptr, "?????");
2793 bcc_ptr += strlen("?????");
2794 bcc_ptr += 1;
2795 count = bcc_ptr - &pSMB->Password[0];
2796 pSMB->hdr.smb_buf_length += count;
2797 pSMB->ByteCount = cpu_to_le16(count);
2798
Steve French133672e2007-11-13 22:41:37 +00002799 rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length,
2800 CIFS_STD_OP);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002801
Linus Torvalds1da177e2005-04-16 15:20:36 -07002802 /* above now done in SendReceive */
2803 if ((rc == 0) && (tcon != NULL)) {
Steve French0e0d2cf2009-05-01 05:27:32 +00002804 bool is_unicode;
2805
Linus Torvalds1da177e2005-04-16 15:20:36 -07002806 tcon->tidStatus = CifsGood;
Steve French3b795212008-11-13 19:45:32 +00002807 tcon->need_reconnect = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002808 tcon->tid = smb_buffer_response->Tid;
2809 bcc_ptr = pByteArea(smb_buffer_response);
Jeff Laytoncc20c032009-04-30 07:16:21 -04002810 bytes_left = BCC(smb_buffer_response);
2811 length = strnlen(bcc_ptr, bytes_left - 2);
Steve French0e0d2cf2009-05-01 05:27:32 +00002812 if (smb_buffer->Flags2 & SMBFLG2_UNICODE)
2813 is_unicode = true;
2814 else
2815 is_unicode = false;
2816
Jeff Laytoncc20c032009-04-30 07:16:21 -04002817
Steve French50c2f752007-07-13 00:33:32 +00002818 /* skip service field (NB: this field is always ASCII) */
Steve French7f8ed422007-09-28 22:28:55 +00002819 if (length == 3) {
2820 if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') &&
2821 (bcc_ptr[2] == 'C')) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00002822 cFYI(1, "IPC connection");
Steve French7f8ed422007-09-28 22:28:55 +00002823 tcon->ipc = 1;
2824 }
2825 } else if (length == 2) {
2826 if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) {
2827 /* the most common case */
Joe Perchesb6b38f72010-04-21 03:50:45 +00002828 cFYI(1, "disk share connection");
Steve French7f8ed422007-09-28 22:28:55 +00002829 }
2830 }
Steve French50c2f752007-07-13 00:33:32 +00002831 bcc_ptr += length + 1;
Jeff Laytoncc20c032009-04-30 07:16:21 -04002832 bytes_left -= (length + 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002833 strncpy(tcon->treeName, tree, MAX_TREE_SIZE);
Jeff Laytoncc20c032009-04-30 07:16:21 -04002834
2835 /* mostly informational -- no need to fail on error here */
Jeff Layton90a98b22009-07-20 13:40:52 -04002836 kfree(tcon->nativeFileSystem);
Steve Frenchd185cda2009-04-30 17:45:10 +00002837 tcon->nativeFileSystem = cifs_strndup_from_ucs(bcc_ptr,
Steve French0e0d2cf2009-05-01 05:27:32 +00002838 bytes_left, is_unicode,
Jeff Laytoncc20c032009-04-30 07:16:21 -04002839 nls_codepage);
2840
Joe Perchesb6b38f72010-04-21 03:50:45 +00002841 cFYI(1, "nativeFileSystem=%s", tcon->nativeFileSystem);
Jeff Laytoncc20c032009-04-30 07:16:21 -04002842
Steve Frenchfb8c4b12007-07-10 01:16:18 +00002843 if ((smb_buffer_response->WordCount == 3) ||
Steve French1a4e15a2006-10-12 21:33:51 +00002844 (smb_buffer_response->WordCount == 7))
2845 /* field is in same location */
Steve French39798772006-05-31 22:40:51 +00002846 tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport);
2847 else
2848 tcon->Flags = 0;
Joe Perchesb6b38f72010-04-21 03:50:45 +00002849 cFYI(1, "Tcon flags: 0x%x ", tcon->Flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002850 } else if ((rc == 0) && tcon == NULL) {
Steve French50c2f752007-07-13 00:33:32 +00002851 /* all we need to save for IPC$ connection */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002852 ses->ipc_tid = smb_buffer_response->Tid;
2853 }
2854
Mariusz Kozlowskia8a11d32007-10-03 16:41:24 +00002855 cifs_buf_release(smb_buffer);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002856 return rc;
2857}
2858
2859int
2860cifs_umount(struct super_block *sb, struct cifs_sb_info *cifs_sb)
2861{
2862 int rc = 0;
Steve French50c2f752007-07-13 00:33:32 +00002863 char *tmp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002864
Jeff Laytonf1987b42008-11-15 11:12:47 -05002865 if (cifs_sb->tcon)
2866 cifs_put_tcon(cifs_sb->tcon);
Steve French50c2f752007-07-13 00:33:32 +00002867
Linus Torvalds1da177e2005-04-16 15:20:36 -07002868 cifs_sb->tcon = NULL;
Steve French2fe87f02006-09-21 07:02:52 +00002869 tmp = cifs_sb->prepath;
2870 cifs_sb->prepathlen = 0;
2871 cifs_sb->prepath = NULL;
2872 kfree(tmp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002873
Steve French88e7d702008-01-03 17:37:09 +00002874 return rc;
Steve French50c2f752007-07-13 00:33:32 +00002875}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002876
2877int cifs_setup_session(unsigned int xid, struct cifsSesInfo *pSesInfo,
Steve French50c2f752007-07-13 00:33:32 +00002878 struct nls_table *nls_info)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002879{
2880 int rc = 0;
Steve Frenchad009ac2005-04-28 22:41:05 -07002881 int first_time = 0;
Jeff Laytoncb7691b2008-08-18 15:41:05 -04002882 struct TCP_Server_Info *server = pSesInfo->server;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002883
2884 /* what if server changes its buffer size after dropping the session? */
Jeff Laytoncb7691b2008-08-18 15:41:05 -04002885 if (server->maxBuf == 0) /* no need to send on reconnect */ {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002886 rc = CIFSSMBNegotiate(xid, pSesInfo);
Jeff Laytoncb7691b2008-08-18 15:41:05 -04002887 if (rc == -EAGAIN) {
2888 /* retry only once on 1st time connection */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002889 rc = CIFSSMBNegotiate(xid, pSesInfo);
Steve French50c2f752007-07-13 00:33:32 +00002890 if (rc == -EAGAIN)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002891 rc = -EHOSTDOWN;
2892 }
Steve Frenchfb8c4b12007-07-10 01:16:18 +00002893 if (rc == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002894 spin_lock(&GlobalMid_Lock);
Jeff Laytoncb7691b2008-08-18 15:41:05 -04002895 if (server->tcpStatus != CifsExiting)
2896 server->tcpStatus = CifsGood;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002897 else
2898 rc = -EHOSTDOWN;
2899 spin_unlock(&GlobalMid_Lock);
2900
2901 }
Steve Frenchad009ac2005-04-28 22:41:05 -07002902 first_time = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002903 }
Steve French26b994f2008-08-06 05:11:33 +00002904
2905 if (rc)
2906 goto ss_err_exit;
2907
2908 pSesInfo->flags = 0;
Jeff Laytoncb7691b2008-08-18 15:41:05 -04002909 pSesInfo->capabilities = server->capabilities;
Steve French26b994f2008-08-06 05:11:33 +00002910 if (linuxExtEnabled == 0)
2911 pSesInfo->capabilities &= (~CAP_UNIX);
Steve French20418ac2009-04-30 16:13:32 +00002912
Joe Perchesb6b38f72010-04-21 03:50:45 +00002913 cFYI(1, "Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d",
2914 server->secMode, server->capabilities, server->timeAdj);
Jeff Laytoncb7691b2008-08-18 15:41:05 -04002915
Steve French20418ac2009-04-30 16:13:32 +00002916 rc = CIFS_SessSetup(xid, pSesInfo, first_time, nls_info);
Steve French26b994f2008-08-06 05:11:33 +00002917 if (rc) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00002918 cERROR(1, "Send error in SessSetup = %d", rc);
Steve French26b994f2008-08-06 05:11:33 +00002919 } else {
Joe Perchesb6b38f72010-04-21 03:50:45 +00002920 cFYI(1, "CIFS Session Established successfully");
Steve French20418ac2009-04-30 16:13:32 +00002921 spin_lock(&GlobalMid_Lock);
2922 pSesInfo->status = CifsGood;
2923 pSesInfo->need_reconnect = false;
2924 spin_unlock(&GlobalMid_Lock);
Steve French26b994f2008-08-06 05:11:33 +00002925 }
2926
Linus Torvalds1da177e2005-04-16 15:20:36 -07002927ss_err_exit:
2928 return rc;
2929}
2930