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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"
Suresh Jayaraman488f1d2d2010-07-05 18:12:15 +053050#include "fscache.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070051
52#define CIFS_PORT 445
53#define RFC1001_PORT 139
54
Jeff Laytonc74093b2011-01-11 07:24:23 -050055/* SMB echo "timeout" -- FIXME: tunable? */
56#define SMB_ECHO_INTERVAL (60 * HZ)
57
Linus Torvalds1da177e2005-04-16 15:20:36 -070058extern void SMBNTencrypt(unsigned char *passwd, unsigned char *c8,
59 unsigned char *p24);
60
61extern mempool_t *cifs_req_poolp;
62
63struct smb_vol {
64 char *username;
65 char *password;
66 char *domainname;
67 char *UNC;
68 char *UNCip;
Linus Torvalds1da177e2005-04-16 15:20:36 -070069 char *iocharset; /* local code page for mapping to and from Unicode */
Jeff Layton1397f2e2011-01-07 11:30:28 -050070 char source_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* clnt nb name */
71 char target_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* srvr nb name */
Jeff Layton3e4b3e12010-07-19 18:00:17 -040072 uid_t cred_uid;
Linus Torvalds1da177e2005-04-16 15:20:36 -070073 uid_t linux_uid;
74 gid_t linux_gid;
75 mode_t file_mode;
76 mode_t dir_mode;
Steve French189acaa2006-06-23 02:33:48 +000077 unsigned secFlg;
Steve French4b18f2a2008-04-29 00:06:05 +000078 bool retry:1;
79 bool intr:1;
80 bool setuids:1;
81 bool override_uid:1;
82 bool override_gid:1;
Jeff Laytond0a9c072008-05-12 22:23:49 +000083 bool dynperm:1;
Steve French4b18f2a2008-04-29 00:06:05 +000084 bool noperm:1;
85 bool no_psx_acl:1; /* set if posix acl support should be disabled */
86 bool cifs_acl:1;
87 bool no_xattr:1; /* set if xattr (EA) support should be disabled*/
88 bool server_ino:1; /* use inode numbers from server ie UniqueId */
89 bool direct_io:1;
Steve French95b1cb92008-05-15 16:44:38 +000090 bool remap:1; /* set to remap seven reserved chars in filenames */
91 bool posix_paths:1; /* unset to not ask for posix pathnames. */
Steve French4b18f2a2008-04-29 00:06:05 +000092 bool no_linux_ext:1;
93 bool sfu_emul:1;
Steve French95b1cb92008-05-15 16:44:38 +000094 bool nullauth:1; /* attempt to authenticate with null user */
95 bool nocase:1; /* request case insensitive filenames */
96 bool nobrl:1; /* disable sending byte range locks to srv */
Steve French13a6e422008-12-02 17:24:33 +000097 bool mand_lock:1; /* send mandatory not posix byte range lock reqs */
Steve French95b1cb92008-05-15 16:44:38 +000098 bool seal:1; /* request transport encryption on share */
Steve French84210e92008-10-23 04:42:37 +000099 bool nodfs:1; /* Do not request DFS, even if available */
100 bool local_lease:1; /* check leases only on local system, not remote */
Steve Frenchedf1ae42008-10-29 00:47:57 +0000101 bool noblocksnd:1;
102 bool noautotune:1;
Steve Frenchbe652442009-02-23 15:21:59 +0000103 bool nostrictsync:1; /* do not force expensive SMBflush on every sync */
Suresh Jayaramanfa1df752010-07-05 18:13:36 +0530104 bool fsc:1; /* enable fscache */
Stefan Metzmacher736a3322010-07-30 14:56:00 +0200105 bool mfsymlinks:1; /* use Minshall+French Symlinks */
Jeff Layton0eb8a132010-10-06 19:51:12 -0400106 bool multiuser:1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107 unsigned int rsize;
108 unsigned int wsize;
Steve French6a5fa2362010-01-01 01:28:43 +0000109 bool sockopt_tcp_nodelay:1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110 unsigned short int port;
Suresh Jayaraman6d20e842010-12-01 14:42:28 +0530111 unsigned long actimeo; /* attribute cache timeout (jiffies) */
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000112 char *prepath;
Ben Greear3eb9a882010-09-01 17:06:02 -0700113 struct sockaddr_storage srcaddr; /* allow binding to a local IP */
Jeff Laytona5fc4ce2010-04-24 07:57:42 -0400114 struct nls_table *local_nls;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115};
116
Jeff Layton2de970f2010-10-06 19:51:12 -0400117/* FIXME: should these be tunable? */
Jeff Layton9d002df2010-10-06 19:51:11 -0400118#define TLINK_ERROR_EXPIRE (1 * HZ)
Jeff Layton2de970f2010-10-06 19:51:12 -0400119#define TLINK_IDLE_EXPIRE (600 * HZ)
Jeff Layton9d002df2010-10-06 19:51:11 -0400120
Pavel Shilovskya9f1b852010-12-13 19:08:35 +0300121static int ip_connect(struct TCP_Server_Info *server);
122static int generic_ip_connect(struct TCP_Server_Info *server);
Jeff Laytonb647c352010-10-28 11:16:44 -0400123static void tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink);
Jeff Layton2de970f2010-10-06 19:51:12 -0400124static void cifs_prune_tlinks(struct work_struct *work);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125
Jeff Laytond5c56052008-12-01 18:42:33 -0500126/*
127 * cifs tcp session reconnection
128 *
129 * mark tcp session as reconnecting so temporarily locked
130 * mark all smb sessions as reconnecting for tcp session
131 * reconnect tcp session
132 * wake up waiters on reconnection? - (not needed currently)
133 */
Steve French2cd646a2006-09-28 19:43:08 +0000134static int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135cifs_reconnect(struct TCP_Server_Info *server)
136{
137 int rc = 0;
Jeff Laytonf1987b42008-11-15 11:12:47 -0500138 struct list_head *tmp, *tmp2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139 struct cifsSesInfo *ses;
140 struct cifsTconInfo *tcon;
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000141 struct mid_q_entry *mid_entry;
Steve French50c2f752007-07-13 00:33:32 +0000142
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143 spin_lock(&GlobalMid_Lock);
Jeff Layton469ee612008-10-16 18:46:39 +0000144 if (server->tcpStatus == CifsExiting) {
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000145 /* the demux thread will exit normally
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146 next time through the loop */
147 spin_unlock(&GlobalMid_Lock);
148 return rc;
149 } else
150 server->tcpStatus = CifsNeedReconnect;
151 spin_unlock(&GlobalMid_Lock);
152 server->maxBuf = 0;
153
Joe Perchesb6b38f72010-04-21 03:50:45 +0000154 cFYI(1, "Reconnecting tcp session");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155
156 /* before reconnecting the tcp session, mark the smb session (uid)
157 and the tid bad so they are not used until reconnected */
Jeff Layton2b84a36c2011-01-11 07:24:21 -0500158 cFYI(1, "%s: marking sessions and tcons for reconnect", __func__);
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +0530159 spin_lock(&cifs_tcp_ses_lock);
Jeff Layton14fbf502008-11-14 13:53:46 -0500160 list_for_each(tmp, &server->smb_ses_list) {
161 ses = list_entry(tmp, struct cifsSesInfo, smb_ses_list);
162 ses->need_reconnect = true;
163 ses->ipc_tid = 0;
Jeff Laytonf1987b42008-11-15 11:12:47 -0500164 list_for_each(tmp2, &ses->tcon_list) {
165 tcon = list_entry(tmp2, struct cifsTconInfo, tcon_list);
166 tcon->need_reconnect = true;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168 }
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +0530169 spin_unlock(&cifs_tcp_ses_lock);
Jeff Layton2b84a36c2011-01-11 07:24:21 -0500170
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171 /* do not want to be sending data on a socket we are freeing */
Jeff Layton2b84a36c2011-01-11 07:24:21 -0500172 cFYI(1, "%s: tearing down socket", __func__);
Jeff Layton72ca5452008-12-01 07:09:36 -0500173 mutex_lock(&server->srv_mutex);
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000174 if (server->ssocket) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000175 cFYI(1, "State: 0x%x Flags: 0x%lx", server->ssocket->state,
176 server->ssocket->flags);
Trond Myklebust91cf45f2007-11-12 18:10:39 -0800177 kernel_sock_shutdown(server->ssocket, SHUT_WR);
Joe Perchesb6b38f72010-04-21 03:50:45 +0000178 cFYI(1, "Post shutdown state: 0x%x Flags: 0x%lx",
Steve French467a8f82007-06-27 22:41:32 +0000179 server->ssocket->state,
Joe Perchesb6b38f72010-04-21 03:50:45 +0000180 server->ssocket->flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181 sock_release(server->ssocket);
182 server->ssocket = NULL;
183 }
Shirish Pargaonkar5d0d2882010-10-13 18:15:00 -0500184 server->sequence_number = 0;
185 server->session_estab = false;
Shirish Pargaonkar21e73392010-10-21 06:42:55 -0500186 kfree(server->session_key.response);
187 server->session_key.response = NULL;
188 server->session_key.len = 0;
Steve Frenchfda35942011-01-20 18:06:34 +0000189 server->lstrp = jiffies;
Jeff Layton2b84a36c2011-01-11 07:24:21 -0500190 mutex_unlock(&server->srv_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191
Jeff Layton2b84a36c2011-01-11 07:24:21 -0500192 /* mark submitted MIDs for retry and issue callback */
193 cFYI(1, "%s: issuing mid callbacks", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194 spin_lock(&GlobalMid_Lock);
Jeff Layton2b84a36c2011-01-11 07:24:21 -0500195 list_for_each_safe(tmp, tmp2, &server->pending_mid_q) {
196 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
197 if (mid_entry->midState == MID_REQUEST_SUBMITTED)
Steve Frenchad8b15f2008-08-08 21:10:16 +0000198 mid_entry->midState = MID_RETRY_NEEDED;
Jeff Layton2b84a36c2011-01-11 07:24:21 -0500199 list_del_init(&mid_entry->qhead);
200 mid_entry->callback(mid_entry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201 }
202 spin_unlock(&GlobalMid_Lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203
Jeff Layton469ee612008-10-16 18:46:39 +0000204 while ((server->tcpStatus != CifsExiting) &&
205 (server->tcpStatus != CifsGood)) {
Steve French6c3d8902006-07-31 22:46:20 +0000206 try_to_freeze();
Pavel Shilovskya9f1b852010-12-13 19:08:35 +0300207
208 /* we should try only the port we connected to before */
209 rc = generic_ip_connect(server);
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000210 if (rc) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000211 cFYI(1, "reconnect error %d", rc);
Steve French0cb766a2005-04-28 22:41:11 -0700212 msleep(3000);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213 } else {
214 atomic_inc(&tcpSesReconnectCount);
215 spin_lock(&GlobalMid_Lock);
Jeff Layton469ee612008-10-16 18:46:39 +0000216 if (server->tcpStatus != CifsExiting)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217 server->tcpStatus = CifsGood;
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000218 spin_unlock(&GlobalMid_Lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219 }
220 }
Jeff Layton2b84a36c2011-01-11 07:24:21 -0500221
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222 return rc;
223}
224
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000225/*
Steve Frenche4eb2952005-04-28 22:41:09 -0700226 return codes:
227 0 not a transact2, or all data present
228 >0 transact2 with that much data missing
229 -EINVAL = invalid transact2
230
231 */
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000232static int check2ndT2(struct smb_hdr *pSMB, unsigned int maxBufSize)
Steve Frenche4eb2952005-04-28 22:41:09 -0700233{
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000234 struct smb_t2_rsp *pSMBt;
235 int total_data_size;
Steve Frenche4eb2952005-04-28 22:41:09 -0700236 int data_in_this_rsp;
237 int remaining;
238
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000239 if (pSMB->Command != SMB_COM_TRANSACTION2)
Steve Frenche4eb2952005-04-28 22:41:09 -0700240 return 0;
241
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000242 /* check for plausible wct, bcc and t2 data and parm sizes */
243 /* check for parm and data offset going beyond end of smb */
244 if (pSMB->WordCount != 10) { /* coalesce_t2 depends on this */
Joe Perchesb6b38f72010-04-21 03:50:45 +0000245 cFYI(1, "invalid transact2 word count");
Steve Frenche4eb2952005-04-28 22:41:09 -0700246 return -EINVAL;
247 }
248
249 pSMBt = (struct smb_t2_rsp *)pSMB;
250
251 total_data_size = le16_to_cpu(pSMBt->t2_rsp.TotalDataCount);
252 data_in_this_rsp = le16_to_cpu(pSMBt->t2_rsp.DataCount);
253
254 remaining = total_data_size - data_in_this_rsp;
255
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000256 if (remaining == 0)
Steve Frenche4eb2952005-04-28 22:41:09 -0700257 return 0;
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000258 else if (remaining < 0) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000259 cFYI(1, "total data %d smaller than data in frame %d",
260 total_data_size, data_in_this_rsp);
Steve Frenche4eb2952005-04-28 22:41:09 -0700261 return -EINVAL;
262 } else {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000263 cFYI(1, "missing %d bytes from transact2, check next response",
264 remaining);
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000265 if (total_data_size > maxBufSize) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000266 cERROR(1, "TotalDataSize %d is over maximum buffer %d",
267 total_data_size, maxBufSize);
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000268 return -EINVAL;
Steve Frenche4eb2952005-04-28 22:41:09 -0700269 }
270 return remaining;
271 }
272}
273
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000274static int coalesce_t2(struct smb_hdr *psecond, struct smb_hdr *pTargetSMB)
Steve Frenche4eb2952005-04-28 22:41:09 -0700275{
276 struct smb_t2_rsp *pSMB2 = (struct smb_t2_rsp *)psecond;
277 struct smb_t2_rsp *pSMBt = (struct smb_t2_rsp *)pTargetSMB;
278 int total_data_size;
279 int total_in_buf;
280 int remaining;
281 int total_in_buf2;
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000282 char *data_area_of_target;
283 char *data_area_of_buf2;
Steve Frenche4eb2952005-04-28 22:41:09 -0700284 __u16 byte_count;
285
286 total_data_size = le16_to_cpu(pSMBt->t2_rsp.TotalDataCount);
287
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000288 if (total_data_size != le16_to_cpu(pSMB2->t2_rsp.TotalDataCount)) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000289 cFYI(1, "total data size of primary and secondary t2 differ");
Steve Frenche4eb2952005-04-28 22:41:09 -0700290 }
291
292 total_in_buf = le16_to_cpu(pSMBt->t2_rsp.DataCount);
293
294 remaining = total_data_size - total_in_buf;
Steve French50c2f752007-07-13 00:33:32 +0000295
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000296 if (remaining < 0)
Steve Frenche4eb2952005-04-28 22:41:09 -0700297 return -EINVAL;
298
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000299 if (remaining == 0) /* nothing to do, ignore */
Steve Frenche4eb2952005-04-28 22:41:09 -0700300 return 0;
Steve French50c2f752007-07-13 00:33:32 +0000301
Steve Frenche4eb2952005-04-28 22:41:09 -0700302 total_in_buf2 = le16_to_cpu(pSMB2->t2_rsp.DataCount);
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000303 if (remaining < total_in_buf2) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000304 cFYI(1, "transact2 2nd response contains too much data");
Steve Frenche4eb2952005-04-28 22:41:09 -0700305 }
306
307 /* find end of first SMB data area */
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000308 data_area_of_target = (char *)&pSMBt->hdr.Protocol +
Steve Frenche4eb2952005-04-28 22:41:09 -0700309 le16_to_cpu(pSMBt->t2_rsp.DataOffset);
310 /* validate target area */
311
312 data_area_of_buf2 = (char *) &pSMB2->hdr.Protocol +
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000313 le16_to_cpu(pSMB2->t2_rsp.DataOffset);
Steve Frenche4eb2952005-04-28 22:41:09 -0700314
315 data_area_of_target += total_in_buf;
316
317 /* copy second buffer into end of first buffer */
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000318 memcpy(data_area_of_target, data_area_of_buf2, total_in_buf2);
Steve Frenche4eb2952005-04-28 22:41:09 -0700319 total_in_buf += total_in_buf2;
320 pSMBt->t2_rsp.DataCount = cpu_to_le16(total_in_buf);
321 byte_count = le16_to_cpu(BCC_LE(pTargetSMB));
322 byte_count += total_in_buf2;
323 BCC_LE(pTargetSMB) = cpu_to_le16(byte_count);
324
Steve French70ca7342005-09-22 16:32:06 -0700325 byte_count = pTargetSMB->smb_buf_length;
Steve Frenche4eb2952005-04-28 22:41:09 -0700326 byte_count += total_in_buf2;
327
328 /* BB also add check that we are not beyond maximum buffer size */
Steve French50c2f752007-07-13 00:33:32 +0000329
Steve French70ca7342005-09-22 16:32:06 -0700330 pTargetSMB->smb_buf_length = byte_count;
Steve Frenche4eb2952005-04-28 22:41:09 -0700331
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000332 if (remaining == total_in_buf2) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000333 cFYI(1, "found the last secondary response");
Steve Frenche4eb2952005-04-28 22:41:09 -0700334 return 0; /* we are done */
335 } else /* more responses to go */
336 return 1;
337
338}
339
Jeff Laytonc74093b2011-01-11 07:24:23 -0500340static void
341cifs_echo_request(struct work_struct *work)
342{
343 int rc;
344 struct TCP_Server_Info *server = container_of(work,
345 struct TCP_Server_Info, echo.work);
346
347 /* no need to ping if we got a response recently */
348 if (time_before(jiffies, server->lstrp + SMB_ECHO_INTERVAL - HZ))
349 goto requeue_echo;
350
351 rc = CIFSSMBEcho(server);
352 if (rc)
353 cFYI(1, "Unable to send echo request to server: %s",
354 server->hostname);
355
356requeue_echo:
357 queue_delayed_work(system_nrt_wq, &server->echo, SMB_ECHO_INTERVAL);
358}
359
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360static int
361cifs_demultiplex_thread(struct TCP_Server_Info *server)
362{
363 int length;
364 unsigned int pdu_length, total_read;
365 struct smb_hdr *smb_buffer = NULL;
Steve Frenchb8643e12005-04-28 22:41:07 -0700366 struct smb_hdr *bigbuf = NULL;
367 struct smb_hdr *smallbuf = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368 struct msghdr smb_msg;
369 struct kvec iov;
370 struct socket *csocket = server->ssocket;
Jeff Layton2b84a36c2011-01-11 07:24:21 -0500371 struct list_head *tmp, *tmp2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700372 struct task_struct *task_to_wake = NULL;
373 struct mid_q_entry *mid_entry;
Steve French70ca7342005-09-22 16:32:06 -0700374 char temp;
Steve French4b18f2a2008-04-29 00:06:05 +0000375 bool isLargeBuf = false;
376 bool isMultiRsp;
Steve Frenche4eb2952005-04-28 22:41:09 -0700377 int reconnect;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379 current->flags |= PF_MEMALLOC;
Joe Perchesb6b38f72010-04-21 03:50:45 +0000380 cFYI(1, "Demultiplex PID: %d", task_pid_nr(current));
Jeff Layton93d0ec82008-08-02 08:00:48 -0400381
382 length = atomic_inc_return(&tcpSesAllocCount);
383 if (length > 1)
Steve French26f57362007-08-30 22:09:15 +0000384 mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
385 GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386
Rafael J. Wysocki83144182007-07-17 04:03:35 -0700387 set_freezable();
Jeff Layton469ee612008-10-16 18:46:39 +0000388 while (server->tcpStatus != CifsExiting) {
Steve Frenchede13272005-08-30 20:10:14 -0700389 if (try_to_freeze())
390 continue;
Steve Frenchb8643e12005-04-28 22:41:07 -0700391 if (bigbuf == NULL) {
392 bigbuf = cifs_buf_get();
Pavel Machek0fd1ffe2006-06-13 21:31:39 +0000393 if (!bigbuf) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000394 cERROR(1, "No memory for large SMB response");
Steve Frenchb8643e12005-04-28 22:41:07 -0700395 msleep(3000);
396 /* retry will check if exiting */
397 continue;
398 }
Pavel Machek0fd1ffe2006-06-13 21:31:39 +0000399 } else if (isLargeBuf) {
400 /* we are reusing a dirty large buf, clear its start */
Steve French26f57362007-08-30 22:09:15 +0000401 memset(bigbuf, 0, sizeof(struct smb_hdr));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402 }
Steve Frenchb8643e12005-04-28 22:41:07 -0700403
404 if (smallbuf == NULL) {
405 smallbuf = cifs_small_buf_get();
Pavel Machek0fd1ffe2006-06-13 21:31:39 +0000406 if (!smallbuf) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000407 cERROR(1, "No memory for SMB response");
Steve Frenchb8643e12005-04-28 22:41:07 -0700408 msleep(1000);
409 /* retry will check if exiting */
410 continue;
411 }
412 /* beginning of smb buffer is cleared in our buf_get */
413 } else /* if existing small buf clear beginning */
Steve French26f57362007-08-30 22:09:15 +0000414 memset(smallbuf, 0, sizeof(struct smb_hdr));
Steve Frenchb8643e12005-04-28 22:41:07 -0700415
Steve French4b18f2a2008-04-29 00:06:05 +0000416 isLargeBuf = false;
417 isMultiRsp = false;
Steve Frenchb8643e12005-04-28 22:41:07 -0700418 smb_buffer = smallbuf;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419 iov.iov_base = smb_buffer;
420 iov.iov_len = 4;
421 smb_msg.msg_control = NULL;
422 smb_msg.msg_controllen = 0;
Steve Frenchf01d5e12007-08-30 21:13:31 +0000423 pdu_length = 4; /* enough to get RFC1001 header */
Steve Frenchfda35942011-01-20 18:06:34 +0000424
Steve Frenchf01d5e12007-08-30 21:13:31 +0000425incomplete_rcv:
Steve Frenchfda35942011-01-20 18:06:34 +0000426 if (echo_retries > 0 &&
427 time_after(jiffies, server->lstrp +
428 (echo_retries * SMB_ECHO_INTERVAL))) {
429 cERROR(1, "Server %s has not responded in %d seconds. "
430 "Reconnecting...", server->hostname,
431 (echo_retries * SMB_ECHO_INTERVAL / HZ));
432 cifs_reconnect(server);
433 csocket = server->ssocket;
434 wake_up(&server->response_q);
435 continue;
436 }
437
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438 length =
439 kernel_recvmsg(csocket, &smb_msg,
Steve Frenchf01d5e12007-08-30 21:13:31 +0000440 &iov, 1, pdu_length, 0 /* BB other flags? */);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441
Jeff Layton469ee612008-10-16 18:46:39 +0000442 if (server->tcpStatus == CifsExiting) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443 break;
444 } else if (server->tcpStatus == CifsNeedReconnect) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000445 cFYI(1, "Reconnect after server stopped responding");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446 cifs_reconnect(server);
Joe Perchesb6b38f72010-04-21 03:50:45 +0000447 cFYI(1, "call to reconnect done");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700448 csocket = server->ssocket;
449 continue;
Jeff Layton522bbe62010-09-03 12:00:49 -0400450 } else if (length == -ERESTARTSYS ||
451 length == -EAGAIN ||
452 length == -EINTR) {
Steve Frenchb8643e12005-04-28 22:41:07 -0700453 msleep(1); /* minimum sleep to prevent looping
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454 allowing socket to clear and app threads to set
455 tcpStatus CifsNeedReconnect if server hung */
Steve Frenchc527c8a2008-11-03 20:46:21 +0000456 if (pdu_length < 4) {
457 iov.iov_base = (4 - pdu_length) +
458 (char *)smb_buffer;
459 iov.iov_len = pdu_length;
460 smb_msg.msg_control = NULL;
461 smb_msg.msg_controllen = 0;
Steve Frenchc18c7322007-10-17 18:01:11 +0000462 goto incomplete_rcv;
Steve Frenchc527c8a2008-11-03 20:46:21 +0000463 } else
Steve Frenchc18c7322007-10-17 18:01:11 +0000464 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465 } else if (length <= 0) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000466 cFYI(1, "Reconnect after unexpected peek error %d",
467 length);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468 cifs_reconnect(server);
469 csocket = server->ssocket;
470 wake_up(&server->response_q);
471 continue;
Petr Tesarik2a974682007-11-20 02:24:08 +0000472 } else if (length < pdu_length) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000473 cFYI(1, "requested %d bytes but only got %d bytes",
474 pdu_length, length);
Steve Frenchf01d5e12007-08-30 21:13:31 +0000475 pdu_length -= length;
Steve Frenchf01d5e12007-08-30 21:13:31 +0000476 msleep(1);
477 goto incomplete_rcv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478 }
Steve French67010fb2005-04-28 22:41:09 -0700479
Steve French70ca7342005-09-22 16:32:06 -0700480 /* The right amount was read from socket - 4 bytes */
481 /* so we can now interpret the length field */
Steve French46810cb2005-04-28 22:41:09 -0700482
Steve French70ca7342005-09-22 16:32:06 -0700483 /* the first byte big endian of the length field,
484 is actually not part of the length but the type
485 with the most common, zero, as regular data */
486 temp = *((char *) smb_buffer);
487
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000488 /* Note that FC 1001 length is big endian on the wire,
Steve French70ca7342005-09-22 16:32:06 -0700489 but we convert it here so it is always manipulated
490 as host byte order */
Harvey Harrison5ca33c62008-07-23 17:45:58 -0700491 pdu_length = be32_to_cpu((__force __be32)smb_buffer->smb_buf_length);
Steve French70ca7342005-09-22 16:32:06 -0700492 smb_buffer->smb_buf_length = pdu_length;
Steve French46810cb2005-04-28 22:41:09 -0700493
Joe Perchesb6b38f72010-04-21 03:50:45 +0000494 cFYI(1, "rfc1002 length 0x%x", pdu_length+4);
Steve French70ca7342005-09-22 16:32:06 -0700495
496 if (temp == (char) RFC1002_SESSION_KEEP_ALIVE) {
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000497 continue;
Steve French70ca7342005-09-22 16:32:06 -0700498 } else if (temp == (char)RFC1002_POSITIVE_SESSION_RESPONSE) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000499 cFYI(1, "Good RFC 1002 session rsp");
Steve Frenche4eb2952005-04-28 22:41:09 -0700500 continue;
Steve French70ca7342005-09-22 16:32:06 -0700501 } else if (temp == (char)RFC1002_NEGATIVE_SESSION_RESPONSE) {
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000502 /* we get this from Windows 98 instead of
Steve French46810cb2005-04-28 22:41:09 -0700503 an error on SMB negprot response */
Joe Perchesb6b38f72010-04-21 03:50:45 +0000504 cFYI(1, "Negative RFC1002 Session Response Error 0x%x)",
505 pdu_length);
Jeff Layton7332f2a2010-09-03 12:00:49 -0400506 /* give server a second to clean up */
507 msleep(1000);
508 /* always try 445 first on reconnect since we get NACK
509 * on some if we ever connected to port 139 (the NACK
510 * is since we do not begin with RFC1001 session
511 * initialize frame)
512 */
Jeff Layton32670392010-09-03 12:00:50 -0400513 cifs_set_port((struct sockaddr *)
Pavel Shilovskya9f1b852010-12-13 19:08:35 +0300514 &server->dstaddr, CIFS_PORT);
Jeff Layton7332f2a2010-09-03 12:00:49 -0400515 cifs_reconnect(server);
516 csocket = server->ssocket;
517 wake_up(&server->response_q);
518 continue;
Steve French70ca7342005-09-22 16:32:06 -0700519 } else if (temp != (char) 0) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000520 cERROR(1, "Unknown RFC 1002 frame");
Steve French70ca7342005-09-22 16:32:06 -0700521 cifs_dump_mem(" Received Data: ", (char *)smb_buffer,
522 length);
Steve French46810cb2005-04-28 22:41:09 -0700523 cifs_reconnect(server);
524 csocket = server->ssocket;
525 continue;
Steve Frenche4eb2952005-04-28 22:41:09 -0700526 }
527
528 /* else we have an SMB response */
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000529 if ((pdu_length > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) ||
Steve French26f57362007-08-30 22:09:15 +0000530 (pdu_length < sizeof(struct smb_hdr) - 1 - 4)) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000531 cERROR(1, "Invalid size SMB length %d pdu_length %d",
532 length, pdu_length+4);
Steve Frenche4eb2952005-04-28 22:41:09 -0700533 cifs_reconnect(server);
534 csocket = server->ssocket;
535 wake_up(&server->response_q);
536 continue;
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000537 }
Steve Frenche4eb2952005-04-28 22:41:09 -0700538
539 /* else length ok */
540 reconnect = 0;
541
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000542 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) {
Steve French4b18f2a2008-04-29 00:06:05 +0000543 isLargeBuf = true;
Steve Frenche4eb2952005-04-28 22:41:09 -0700544 memcpy(bigbuf, smallbuf, 4);
545 smb_buffer = bigbuf;
546 }
547 length = 0;
548 iov.iov_base = 4 + (char *)smb_buffer;
549 iov.iov_len = pdu_length;
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000550 for (total_read = 0; total_read < pdu_length;
Steve Frenche4eb2952005-04-28 22:41:09 -0700551 total_read += length) {
552 length = kernel_recvmsg(csocket, &smb_msg, &iov, 1,
553 pdu_length - total_read, 0);
Jeff Layton522bbe62010-09-03 12:00:49 -0400554 if (server->tcpStatus == CifsExiting) {
Steve Frenche4eb2952005-04-28 22:41:09 -0700555 /* then will exit */
556 reconnect = 2;
557 break;
558 } else if (server->tcpStatus == CifsNeedReconnect) {
Steve French46810cb2005-04-28 22:41:09 -0700559 cifs_reconnect(server);
560 csocket = server->ssocket;
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000561 /* Reconnect wakes up rspns q */
Steve Frenche4eb2952005-04-28 22:41:09 -0700562 /* Now we will reread sock */
563 reconnect = 1;
564 break;
Jeff Layton522bbe62010-09-03 12:00:49 -0400565 } else if (length == -ERESTARTSYS ||
566 length == -EAGAIN ||
567 length == -EINTR) {
Steve Frenche4eb2952005-04-28 22:41:09 -0700568 msleep(1); /* minimum sleep to prevent looping,
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000569 allowing socket to clear and app
Steve Frenche4eb2952005-04-28 22:41:09 -0700570 threads to set tcpStatus
571 CifsNeedReconnect if server hung*/
Steve Frenchc18c7322007-10-17 18:01:11 +0000572 length = 0;
Steve French46810cb2005-04-28 22:41:09 -0700573 continue;
Steve Frenche4eb2952005-04-28 22:41:09 -0700574 } else if (length <= 0) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000575 cERROR(1, "Received no data, expecting %d",
576 pdu_length - total_read);
Steve Frenche4eb2952005-04-28 22:41:09 -0700577 cifs_reconnect(server);
578 csocket = server->ssocket;
579 reconnect = 1;
580 break;
Steve French46810cb2005-04-28 22:41:09 -0700581 }
582 }
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000583 if (reconnect == 2)
Steve Frenche4eb2952005-04-28 22:41:09 -0700584 break;
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000585 else if (reconnect == 1)
Steve Frenche4eb2952005-04-28 22:41:09 -0700586 continue;
587
588 length += 4; /* account for rfc1002 hdr */
Steve French50c2f752007-07-13 00:33:32 +0000589
Steve Frenche4eb2952005-04-28 22:41:09 -0700590
591 dump_smb(smb_buffer, length);
Steve French184ed212006-02-24 06:15:11 +0000592 if (checkSMB(smb_buffer, smb_buffer->Mid, total_read+4)) {
Steve Frenchb387eae2005-10-10 14:21:15 -0700593 cifs_dump_mem("Bad SMB: ", smb_buffer, 48);
Steve Frenche4eb2952005-04-28 22:41:09 -0700594 continue;
595 }
596
Jeff Layton2b84a36c2011-01-11 07:24:21 -0500597 mid_entry = NULL;
Steve Frenchfda35942011-01-20 18:06:34 +0000598 server->lstrp = jiffies;
599
Steve Frenche4eb2952005-04-28 22:41:09 -0700600 spin_lock(&GlobalMid_Lock);
Jeff Layton2b84a36c2011-01-11 07:24:21 -0500601 list_for_each_safe(tmp, tmp2, &server->pending_mid_q) {
Steve Frenche4eb2952005-04-28 22:41:09 -0700602 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
603
Steve French50c2f752007-07-13 00:33:32 +0000604 if ((mid_entry->mid == smb_buffer->Mid) &&
Steve Frenche4eb2952005-04-28 22:41:09 -0700605 (mid_entry->midState == MID_REQUEST_SUBMITTED) &&
606 (mid_entry->command == smb_buffer->Command)) {
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000607 if (check2ndT2(smb_buffer,server->maxBuf) > 0) {
Steve Frenche4eb2952005-04-28 22:41:09 -0700608 /* We have a multipart transact2 resp */
Steve French4b18f2a2008-04-29 00:06:05 +0000609 isMultiRsp = true;
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000610 if (mid_entry->resp_buf) {
Steve Frenche4eb2952005-04-28 22:41:09 -0700611 /* merge response - fix up 1st*/
Steve French50c2f752007-07-13 00:33:32 +0000612 if (coalesce_t2(smb_buffer,
Steve Frenche4eb2952005-04-28 22:41:09 -0700613 mid_entry->resp_buf)) {
Steve French4b18f2a2008-04-29 00:06:05 +0000614 mid_entry->multiRsp =
615 true;
Steve Frenche4eb2952005-04-28 22:41:09 -0700616 break;
617 } else {
618 /* all parts received */
Steve French4b18f2a2008-04-29 00:06:05 +0000619 mid_entry->multiEnd =
620 true;
Steve French50c2f752007-07-13 00:33:32 +0000621 goto multi_t2_fnd;
Steve Frenche4eb2952005-04-28 22:41:09 -0700622 }
623 } else {
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000624 if (!isLargeBuf) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000625 cERROR(1, "1st trans2 resp needs bigbuf");
Steve Frenche4eb2952005-04-28 22:41:09 -0700626 /* BB maybe we can fix this up, switch
Steve French50c2f752007-07-13 00:33:32 +0000627 to already allocated large buffer? */
Steve Frenche4eb2952005-04-28 22:41:09 -0700628 } else {
Steve Frenchcd634992005-04-28 22:41:10 -0700629 /* Have first buffer */
Steve Frenche4eb2952005-04-28 22:41:09 -0700630 mid_entry->resp_buf =
631 smb_buffer;
Steve French4b18f2a2008-04-29 00:06:05 +0000632 mid_entry->largeBuf =
633 true;
Steve Frenche4eb2952005-04-28 22:41:09 -0700634 bigbuf = NULL;
635 }
636 }
637 break;
Steve French50c2f752007-07-13 00:33:32 +0000638 }
Steve Frenche4eb2952005-04-28 22:41:09 -0700639 mid_entry->resp_buf = smb_buffer;
Steve French4b18f2a2008-04-29 00:06:05 +0000640 mid_entry->largeBuf = isLargeBuf;
Steve Frenche4eb2952005-04-28 22:41:09 -0700641multi_t2_fnd:
Steve Frenche4eb2952005-04-28 22:41:09 -0700642 mid_entry->midState = MID_RESPONSE_RECEIVED;
Jeff Layton2b84a36c2011-01-11 07:24:21 -0500643 list_del_init(&mid_entry->qhead);
644 mid_entry->callback(mid_entry);
Steve French1047abc2005-10-11 19:58:06 -0700645#ifdef CONFIG_CIFS_STATS2
646 mid_entry->when_received = jiffies;
647#endif
Steve Frenche4eb2952005-04-28 22:41:09 -0700648 break;
649 }
Jeff Layton2b84a36c2011-01-11 07:24:21 -0500650 mid_entry = NULL;
Steve Frenche4eb2952005-04-28 22:41:09 -0700651 }
652 spin_unlock(&GlobalMid_Lock);
Jeff Layton2b84a36c2011-01-11 07:24:21 -0500653
654 if (mid_entry != NULL) {
Steve Frenchcd634992005-04-28 22:41:10 -0700655 /* Was previous buf put in mpx struct for multi-rsp? */
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000656 if (!isMultiRsp) {
Steve Frenchcd634992005-04-28 22:41:10 -0700657 /* smb buffer will be freed by user thread */
Steve French26f57362007-08-30 22:09:15 +0000658 if (isLargeBuf)
Steve Frenchcd634992005-04-28 22:41:10 -0700659 bigbuf = NULL;
Steve French26f57362007-08-30 22:09:15 +0000660 else
Steve Frenchcd634992005-04-28 22:41:10 -0700661 smallbuf = NULL;
662 }
Steve French4b18f2a2008-04-29 00:06:05 +0000663 } else if (!is_valid_oplock_break(smb_buffer, server) &&
664 !isMultiRsp) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000665 cERROR(1, "No task to wake, unknown frame received! "
Jeff Layton80975312011-01-11 07:24:02 -0500666 "NumMids %d", atomic_read(&midCount));
Steve French50c2f752007-07-13 00:33:32 +0000667 cifs_dump_mem("Received Data is: ", (char *)smb_buffer,
Steve French70ca7342005-09-22 16:32:06 -0700668 sizeof(struct smb_hdr));
Steve French39798772006-05-31 22:40:51 +0000669#ifdef CONFIG_CIFS_DEBUG2
670 cifs_dump_detail(smb_buffer);
671 cifs_dump_mids(server);
672#endif /* CIFS_DEBUG2 */
Steve French50c2f752007-07-13 00:33:32 +0000673
Steve Frenche4eb2952005-04-28 22:41:09 -0700674 }
675 } /* end while !EXITING */
676
Jeff Laytone7ddee92008-11-14 13:44:38 -0500677 /* take it off the list, if it's not already */
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +0530678 spin_lock(&cifs_tcp_ses_lock);
Jeff Laytone7ddee92008-11-14 13:44:38 -0500679 list_del_init(&server->tcp_ses_list);
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +0530680 spin_unlock(&cifs_tcp_ses_lock);
Jeff Laytone7ddee92008-11-14 13:44:38 -0500681
Linus Torvalds1da177e2005-04-16 15:20:36 -0700682 spin_lock(&GlobalMid_Lock);
683 server->tcpStatus = CifsExiting;
Steve Frenche691b9d2008-05-11 15:53:33 +0000684 spin_unlock(&GlobalMid_Lock);
Steve Frenchdbdbb872008-06-10 21:21:56 +0000685 wake_up_all(&server->response_q);
Steve Frenche691b9d2008-05-11 15:53:33 +0000686
Steve French31ca3bc2005-04-28 22:41:11 -0700687 /* check if we have blocked requests that need to free */
688 /* Note that cifs_max_pending is normally 50, but
689 can be set at module install time to as little as two */
Steve Frenche691b9d2008-05-11 15:53:33 +0000690 spin_lock(&GlobalMid_Lock);
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000691 if (atomic_read(&server->inFlight) >= cifs_max_pending)
Steve French31ca3bc2005-04-28 22:41:11 -0700692 atomic_set(&server->inFlight, cifs_max_pending - 1);
693 /* We do not want to set the max_pending too low or we
694 could end up with the counter going negative */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700695 spin_unlock(&GlobalMid_Lock);
Steve French50c2f752007-07-13 00:33:32 +0000696 /* Although there should not be any requests blocked on
Linus Torvalds1da177e2005-04-16 15:20:36 -0700697 this queue it can not hurt to be paranoid and try to wake up requests
Steve French09d1db52005-04-28 22:41:08 -0700698 that may haven been blocked when more than 50 at time were on the wire
Linus Torvalds1da177e2005-04-16 15:20:36 -0700699 to the same server - they now will see the session is in exit state
700 and get out of SendReceive. */
701 wake_up_all(&server->request_q);
702 /* give those requests time to exit */
Steve Frenchb8643e12005-04-28 22:41:07 -0700703 msleep(125);
Steve French50c2f752007-07-13 00:33:32 +0000704
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000705 if (server->ssocket) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700706 sock_release(csocket);
707 server->ssocket = NULL;
708 }
Steve Frenchb8643e12005-04-28 22:41:07 -0700709 /* buffer usuallly freed in free_mid - need to free it here on exit */
Mariusz Kozlowskia8a11d32007-10-03 16:41:24 +0000710 cifs_buf_release(bigbuf);
711 if (smallbuf) /* no sense logging a debug message if NULL */
Steve Frenchb8643e12005-04-28 22:41:07 -0700712 cifs_small_buf_release(smallbuf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700713
Jeff Layton9d783152011-01-11 07:24:01 -0500714 if (!list_empty(&server->pending_mid_q)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700715 spin_lock(&GlobalMid_Lock);
Jeff Layton2b84a36c2011-01-11 07:24:21 -0500716 list_for_each_safe(tmp, tmp2, &server->pending_mid_q) {
Jeff Layton9d783152011-01-11 07:24:01 -0500717 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
Jeff Layton2b84a36c2011-01-11 07:24:21 -0500718 cFYI(1, "Clearing Mid 0x%x - issuing callback",
719 mid_entry->mid);
720 list_del_init(&mid_entry->qhead);
721 mid_entry->callback(mid_entry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700722 }
723 spin_unlock(&GlobalMid_Lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700724 /* 1/8th of sec is more than enough time for them to exit */
Steve Frenchb8643e12005-04-28 22:41:07 -0700725 msleep(125);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700726 }
727
Steve Frenchf1914012005-08-18 09:37:34 -0700728 if (!list_empty(&server->pending_mid_q)) {
Steve French50c2f752007-07-13 00:33:32 +0000729 /* mpx threads have not exited yet give them
Linus Torvalds1da177e2005-04-16 15:20:36 -0700730 at least the smb send timeout time for long ops */
Steve French31ca3bc2005-04-28 22:41:11 -0700731 /* due to delays on oplock break requests, we need
732 to wait at least 45 seconds before giving up
733 on a request getting a response and going ahead
734 and killing cifsd */
Joe Perchesb6b38f72010-04-21 03:50:45 +0000735 cFYI(1, "Wait for exit from demultiplex thread");
Steve French31ca3bc2005-04-28 22:41:11 -0700736 msleep(46000);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700737 /* if threads still have not exited they are probably never
738 coming home not much else we can do but free the memory */
739 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700740
Jeff Laytonc359cf32007-11-16 22:22:06 +0000741 kfree(server->hostname);
Jeff Laytonb1c8d2b2008-10-22 13:57:07 -0400742 task_to_wake = xchg(&server->tsk, NULL);
Steve French31ca3bc2005-04-28 22:41:11 -0700743 kfree(server);
Jeff Layton93d0ec82008-08-02 08:00:48 -0400744
745 length = atomic_dec_return(&tcpSesAllocCount);
Steve French26f57362007-08-30 22:09:15 +0000746 if (length > 0)
747 mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
748 GFP_KERNEL);
Steve French50c2f752007-07-13 00:33:32 +0000749
Jeff Laytonb1c8d2b2008-10-22 13:57:07 -0400750 /* if server->tsk was NULL then wait for a signal before exiting */
751 if (!task_to_wake) {
752 set_current_state(TASK_INTERRUPTIBLE);
753 while (!signal_pending(current)) {
754 schedule();
755 set_current_state(TASK_INTERRUPTIBLE);
756 }
757 set_current_state(TASK_RUNNING);
758 }
759
Jeff Layton0468a2c2008-12-01 07:09:35 -0500760 module_put_and_exit(0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700761}
762
Jeff Laytonc359cf32007-11-16 22:22:06 +0000763/* extract the host portion of the UNC string */
764static char *
765extract_hostname(const char *unc)
766{
767 const char *src;
768 char *dst, *delim;
769 unsigned int len;
770
771 /* skip double chars at beginning of string */
772 /* BB: check validity of these bytes? */
773 src = unc + 2;
774
775 /* delimiter between hostname and sharename is always '\\' now */
776 delim = strchr(src, '\\');
777 if (!delim)
778 return ERR_PTR(-EINVAL);
779
780 len = delim - src;
781 dst = kmalloc((len + 1), GFP_KERNEL);
782 if (dst == NULL)
783 return ERR_PTR(-ENOMEM);
784
785 memcpy(dst, src, len);
786 dst[len] = '\0';
787
788 return dst;
789}
790
Linus Torvalds1da177e2005-04-16 15:20:36 -0700791static int
Steve French50c2f752007-07-13 00:33:32 +0000792cifs_parse_mount_options(char *options, const char *devname,
793 struct smb_vol *vol)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700794{
795 char *value;
796 char *data;
797 unsigned int temp_len, i, j;
798 char separator[2];
Jeff Layton9b9d6b242009-07-31 06:56:09 -0400799 short int override_uid = -1;
800 short int override_gid = -1;
801 bool uid_specified = false;
802 bool gid_specified = false;
Jeff Layton88463992010-11-22 15:31:03 -0500803 char *nodename = utsname()->nodename;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700804
805 separator[0] = ',';
Steve French50c2f752007-07-13 00:33:32 +0000806 separator[1] = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700807
Jeff Layton88463992010-11-22 15:31:03 -0500808 /*
809 * does not have to be perfect mapping since field is
810 * informational, only used for servers that do not support
811 * port 445 and it can be overridden at mount time
812 */
Jeff Layton1397f2e2011-01-07 11:30:28 -0500813 memset(vol->source_rfc1001_name, 0x20, RFC1001_NAME_LEN);
814 for (i = 0; i < strnlen(nodename, RFC1001_NAME_LEN); i++)
Jeff Layton88463992010-11-22 15:31:03 -0500815 vol->source_rfc1001_name[i] = toupper(nodename[i]);
816
Jeff Layton1397f2e2011-01-07 11:30:28 -0500817 vol->source_rfc1001_name[RFC1001_NAME_LEN] = 0;
Steve Frencha10faeb22005-08-22 21:38:31 -0700818 /* null target name indicates to use *SMBSERVR default called name
819 if we end up sending RFC1001 session initialize */
820 vol->target_rfc1001_name[0] = 0;
Jeff Layton3e4b3e12010-07-19 18:00:17 -0400821 vol->cred_uid = current_uid();
822 vol->linux_uid = current_uid();
David Howellsa001e5b2008-11-14 10:38:47 +1100823 vol->linux_gid = current_gid();
Jeff Laytonf55ed1a2009-05-26 16:28:11 -0400824
825 /* default to only allowing write access to owner of the mount */
826 vol->dir_mode = vol->file_mode = S_IRUGO | S_IXUGO | S_IWUSR;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700827
828 /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */
Jeremy Allisonac670552005-06-22 17:26:35 -0700829 /* default is always to request posix paths. */
830 vol->posix_paths = 1;
Jeff Laytona0c92172009-05-27 15:40:47 -0400831 /* default to using server inode numbers where available */
832 vol->server_ino = 1;
Jeremy Allisonac670552005-06-22 17:26:35 -0700833
Suresh Jayaraman6d20e842010-12-01 14:42:28 +0530834 vol->actimeo = CIFS_DEF_ACTIMEO;
835
Linus Torvalds1da177e2005-04-16 15:20:36 -0700836 if (!options)
837 return 1;
838
Steve French50c2f752007-07-13 00:33:32 +0000839 if (strncmp(options, "sep=", 4) == 0) {
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000840 if (options[4] != 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700841 separator[0] = options[4];
842 options += 5;
843 } else {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000844 cFYI(1, "Null separator not allowed");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700845 }
846 }
Steve French50c2f752007-07-13 00:33:32 +0000847
Linus Torvalds1da177e2005-04-16 15:20:36 -0700848 while ((data = strsep(&options, separator)) != NULL) {
849 if (!*data)
850 continue;
851 if ((value = strchr(data, '=')) != NULL)
852 *value++ = '\0';
853
Steve French50c2f752007-07-13 00:33:32 +0000854 /* Have to parse this before we parse for "user" */
855 if (strnicmp(data, "user_xattr", 10) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700856 vol->no_xattr = 0;
Steve French50c2f752007-07-13 00:33:32 +0000857 } else if (strnicmp(data, "nouser_xattr", 12) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700858 vol->no_xattr = 1;
859 } else if (strnicmp(data, "user", 4) == 0) {
Steve French4b952a92006-10-30 21:46:13 +0000860 if (!value) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700861 printk(KERN_WARNING
862 "CIFS: invalid or missing username\n");
863 return 1; /* needs_arg; */
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000864 } else if (!*value) {
Steve French4b952a92006-10-30 21:46:13 +0000865 /* null user, ie anonymous, authentication */
866 vol->nullauth = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700867 }
868 if (strnlen(value, 200) < 200) {
869 vol->username = value;
870 } else {
871 printk(KERN_WARNING "CIFS: username too long\n");
872 return 1;
873 }
874 } else if (strnicmp(data, "pass", 4) == 0) {
875 if (!value) {
876 vol->password = NULL;
877 continue;
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000878 } else if (value[0] == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700879 /* check if string begins with double comma
880 since that would mean the password really
881 does start with a comma, and would not
882 indicate an empty string */
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000883 if (value[1] != separator[0]) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700884 vol->password = NULL;
885 continue;
886 }
887 }
888 temp_len = strlen(value);
889 /* removed password length check, NTLM passwords
890 can be arbitrarily long */
891
Steve French50c2f752007-07-13 00:33:32 +0000892 /* if comma in password, the string will be
Linus Torvalds1da177e2005-04-16 15:20:36 -0700893 prematurely null terminated. Commas in password are
894 specified across the cifs mount interface by a double
895 comma ie ,, and a comma used as in other cases ie ','
896 as a parameter delimiter/separator is single and due
897 to the strsep above is temporarily zeroed. */
898
899 /* NB: password legally can have multiple commas and
900 the only illegal character in a password is null */
901
Steve French50c2f752007-07-13 00:33:32 +0000902 if ((value[temp_len] == 0) &&
Steve French09d1db52005-04-28 22:41:08 -0700903 (value[temp_len+1] == separator[0])) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700904 /* reinsert comma */
905 value[temp_len] = separator[0];
Steve French50c2f752007-07-13 00:33:32 +0000906 temp_len += 2; /* move after second comma */
907 while (value[temp_len] != 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700908 if (value[temp_len] == separator[0]) {
Steve French50c2f752007-07-13 00:33:32 +0000909 if (value[temp_len+1] ==
Steve French09d1db52005-04-28 22:41:08 -0700910 separator[0]) {
911 /* skip second comma */
912 temp_len++;
Steve French50c2f752007-07-13 00:33:32 +0000913 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700914 /* single comma indicating start
915 of next parm */
916 break;
917 }
918 }
919 temp_len++;
920 }
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000921 if (value[temp_len] == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700922 options = NULL;
923 } else {
924 value[temp_len] = 0;
925 /* point option to start of next parm */
926 options = value + temp_len + 1;
927 }
Steve French50c2f752007-07-13 00:33:32 +0000928 /* go from value to value + temp_len condensing
Linus Torvalds1da177e2005-04-16 15:20:36 -0700929 double commas to singles. Note that this ends up
930 allocating a few bytes too many, which is ok */
Pekka Enberge915fc42005-09-06 15:18:35 -0700931 vol->password = kzalloc(temp_len, GFP_KERNEL);
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000932 if (vol->password == NULL) {
Steve French50c2f752007-07-13 00:33:32 +0000933 printk(KERN_WARNING "CIFS: no memory "
934 "for password\n");
Steve French433dc242005-04-28 22:41:08 -0700935 return 1;
936 }
Steve French50c2f752007-07-13 00:33:32 +0000937 for (i = 0, j = 0; i < temp_len; i++, j++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700938 vol->password[j] = value[i];
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000939 if (value[i] == separator[0]
Steve French09d1db52005-04-28 22:41:08 -0700940 && value[i+1] == separator[0]) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700941 /* skip second comma */
942 i++;
943 }
944 }
945 vol->password[j] = 0;
946 } else {
Pekka Enberge915fc42005-09-06 15:18:35 -0700947 vol->password = kzalloc(temp_len+1, GFP_KERNEL);
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000948 if (vol->password == NULL) {
Steve French50c2f752007-07-13 00:33:32 +0000949 printk(KERN_WARNING "CIFS: no memory "
950 "for password\n");
Steve French433dc242005-04-28 22:41:08 -0700951 return 1;
952 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700953 strcpy(vol->password, value);
954 }
Jeff Layton58f7f682009-06-10 09:57:55 -0400955 } else if (!strnicmp(data, "ip", 2) ||
956 !strnicmp(data, "addr", 4)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700957 if (!value || !*value) {
958 vol->UNCip = NULL;
Jeff Layton50b64e32009-06-02 06:55:20 -0400959 } else if (strnlen(value, INET6_ADDRSTRLEN) <
960 INET6_ADDRSTRLEN) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700961 vol->UNCip = value;
962 } else {
Steve French50c2f752007-07-13 00:33:32 +0000963 printk(KERN_WARNING "CIFS: ip address "
964 "too long\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700965 return 1;
966 }
Steve French50c2f752007-07-13 00:33:32 +0000967 } else if (strnicmp(data, "sec", 3) == 0) {
968 if (!value || !*value) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000969 cERROR(1, "no security value specified");
Steve French50c2f752007-07-13 00:33:32 +0000970 continue;
971 } else if (strnicmp(value, "krb5i", 5) == 0) {
972 vol->secFlg |= CIFSSEC_MAY_KRB5 |
Steve French189acaa2006-06-23 02:33:48 +0000973 CIFSSEC_MUST_SIGN;
Steve Frenchbf820672005-12-01 22:32:42 -0800974 } else if (strnicmp(value, "krb5p", 5) == 0) {
Steve French50c2f752007-07-13 00:33:32 +0000975 /* vol->secFlg |= CIFSSEC_MUST_SEAL |
976 CIFSSEC_MAY_KRB5; */
Joe Perchesb6b38f72010-04-21 03:50:45 +0000977 cERROR(1, "Krb5 cifs privacy not supported");
Steve Frenchbf820672005-12-01 22:32:42 -0800978 return 1;
979 } else if (strnicmp(value, "krb5", 4) == 0) {
Steve French750d1152006-06-27 06:28:30 +0000980 vol->secFlg |= CIFSSEC_MAY_KRB5;
Steve Frenchac683922009-05-06 04:16:04 +0000981 } else if (strnicmp(value, "ntlmsspi", 8) == 0) {
982 vol->secFlg |= CIFSSEC_MAY_NTLMSSP |
983 CIFSSEC_MUST_SIGN;
984 } else if (strnicmp(value, "ntlmssp", 7) == 0) {
985 vol->secFlg |= CIFSSEC_MAY_NTLMSSP;
Steve Frenchbf820672005-12-01 22:32:42 -0800986 } else if (strnicmp(value, "ntlmv2i", 7) == 0) {
Steve French750d1152006-06-27 06:28:30 +0000987 vol->secFlg |= CIFSSEC_MAY_NTLMV2 |
Steve French189acaa2006-06-23 02:33:48 +0000988 CIFSSEC_MUST_SIGN;
Steve Frenchbf820672005-12-01 22:32:42 -0800989 } else if (strnicmp(value, "ntlmv2", 6) == 0) {
Steve French750d1152006-06-27 06:28:30 +0000990 vol->secFlg |= CIFSSEC_MAY_NTLMV2;
Steve Frenchbf820672005-12-01 22:32:42 -0800991 } else if (strnicmp(value, "ntlmi", 5) == 0) {
Steve French750d1152006-06-27 06:28:30 +0000992 vol->secFlg |= CIFSSEC_MAY_NTLM |
Steve French189acaa2006-06-23 02:33:48 +0000993 CIFSSEC_MUST_SIGN;
Steve Frenchbf820672005-12-01 22:32:42 -0800994 } else if (strnicmp(value, "ntlm", 4) == 0) {
995 /* ntlm is default so can be turned off too */
Steve French750d1152006-06-27 06:28:30 +0000996 vol->secFlg |= CIFSSEC_MAY_NTLM;
Steve Frenchbf820672005-12-01 22:32:42 -0800997 } else if (strnicmp(value, "nontlm", 6) == 0) {
Steve French189acaa2006-06-23 02:33:48 +0000998 /* BB is there a better way to do this? */
Steve French750d1152006-06-27 06:28:30 +0000999 vol->secFlg |= CIFSSEC_MAY_NTLMV2;
Steve French189acaa2006-06-23 02:33:48 +00001000#ifdef CONFIG_CIFS_WEAK_PW_HASH
1001 } else if (strnicmp(value, "lanman", 6) == 0) {
Steve French50c2f752007-07-13 00:33:32 +00001002 vol->secFlg |= CIFSSEC_MAY_LANMAN;
Steve French189acaa2006-06-23 02:33:48 +00001003#endif
Steve Frenchbf820672005-12-01 22:32:42 -08001004 } else if (strnicmp(value, "none", 4) == 0) {
Steve French189acaa2006-06-23 02:33:48 +00001005 vol->nullauth = 1;
Steve French50c2f752007-07-13 00:33:32 +00001006 } else {
Joe Perchesb6b38f72010-04-21 03:50:45 +00001007 cERROR(1, "bad security option: %s", value);
Steve French50c2f752007-07-13 00:33:32 +00001008 return 1;
1009 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001010 } else if ((strnicmp(data, "unc", 3) == 0)
1011 || (strnicmp(data, "target", 6) == 0)
1012 || (strnicmp(data, "path", 4) == 0)) {
1013 if (!value || !*value) {
Steve French50c2f752007-07-13 00:33:32 +00001014 printk(KERN_WARNING "CIFS: invalid path to "
1015 "network resource\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001016 return 1; /* needs_arg; */
1017 }
1018 if ((temp_len = strnlen(value, 300)) < 300) {
Steve French50c2f752007-07-13 00:33:32 +00001019 vol->UNC = kmalloc(temp_len+1, GFP_KERNEL);
Steve French4523cc32007-04-30 20:13:06 +00001020 if (vol->UNC == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001021 return 1;
Steve French50c2f752007-07-13 00:33:32 +00001022 strcpy(vol->UNC, value);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001023 if (strncmp(vol->UNC, "//", 2) == 0) {
1024 vol->UNC[0] = '\\';
1025 vol->UNC[1] = '\\';
Steve French50c2f752007-07-13 00:33:32 +00001026 } else if (strncmp(vol->UNC, "\\\\", 2) != 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001027 printk(KERN_WARNING
Steve French50c2f752007-07-13 00:33:32 +00001028 "CIFS: UNC Path does not begin "
1029 "with // or \\\\ \n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001030 return 1;
1031 }
1032 } else {
1033 printk(KERN_WARNING "CIFS: UNC name too long\n");
1034 return 1;
1035 }
1036 } else if ((strnicmp(data, "domain", 3) == 0)
1037 || (strnicmp(data, "workgroup", 5) == 0)) {
1038 if (!value || !*value) {
1039 printk(KERN_WARNING "CIFS: invalid domain name\n");
1040 return 1; /* needs_arg; */
1041 }
1042 /* BB are there cases in which a comma can be valid in
1043 a domain name and need special handling? */
Steve French39798772006-05-31 22:40:51 +00001044 if (strnlen(value, 256) < 256) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001045 vol->domainname = value;
Joe Perchesb6b38f72010-04-21 03:50:45 +00001046 cFYI(1, "Domain name set");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001047 } else {
Steve French50c2f752007-07-13 00:33:32 +00001048 printk(KERN_WARNING "CIFS: domain name too "
1049 "long\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001050 return 1;
1051 }
Ben Greear3eb9a882010-09-01 17:06:02 -07001052 } else if (strnicmp(data, "srcaddr", 7) == 0) {
1053 vol->srcaddr.ss_family = AF_UNSPEC;
1054
1055 if (!value || !*value) {
1056 printk(KERN_WARNING "CIFS: srcaddr value"
1057 " not specified.\n");
1058 return 1; /* needs_arg; */
1059 }
1060 i = cifs_convert_address((struct sockaddr *)&vol->srcaddr,
1061 value, strlen(value));
Dan Carpenterb235f372010-10-25 07:02:56 +02001062 if (i == 0) {
Ben Greear3eb9a882010-09-01 17:06:02 -07001063 printk(KERN_WARNING "CIFS: Could not parse"
1064 " srcaddr: %s\n",
1065 value);
1066 return 1;
1067 }
Steve French50c2f752007-07-13 00:33:32 +00001068 } else if (strnicmp(data, "prefixpath", 10) == 0) {
1069 if (!value || !*value) {
1070 printk(KERN_WARNING
1071 "CIFS: invalid path prefix\n");
1072 return 1; /* needs_argument */
1073 }
1074 if ((temp_len = strnlen(value, 1024)) < 1024) {
Steve French4523cc32007-04-30 20:13:06 +00001075 if (value[0] != '/')
Steve French2fe87f02006-09-21 07:02:52 +00001076 temp_len++; /* missing leading slash */
Steve French50c2f752007-07-13 00:33:32 +00001077 vol->prepath = kmalloc(temp_len+1, GFP_KERNEL);
1078 if (vol->prepath == NULL)
1079 return 1;
Steve French4523cc32007-04-30 20:13:06 +00001080 if (value[0] != '/') {
Steve French2fe87f02006-09-21 07:02:52 +00001081 vol->prepath[0] = '/';
Steve French50c2f752007-07-13 00:33:32 +00001082 strcpy(vol->prepath+1, value);
Steve French2fe87f02006-09-21 07:02:52 +00001083 } else
Steve French50c2f752007-07-13 00:33:32 +00001084 strcpy(vol->prepath, value);
Joe Perchesb6b38f72010-04-21 03:50:45 +00001085 cFYI(1, "prefix path %s", vol->prepath);
Steve French50c2f752007-07-13 00:33:32 +00001086 } else {
1087 printk(KERN_WARNING "CIFS: prefix too long\n");
1088 return 1;
1089 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001090 } else if (strnicmp(data, "iocharset", 9) == 0) {
1091 if (!value || !*value) {
Steve French63135e02007-07-17 17:34:02 +00001092 printk(KERN_WARNING "CIFS: invalid iocharset "
1093 "specified\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001094 return 1; /* needs_arg; */
1095 }
1096 if (strnlen(value, 65) < 65) {
Steve French50c2f752007-07-13 00:33:32 +00001097 if (strnicmp(value, "default", 7))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001098 vol->iocharset = value;
Steve French50c2f752007-07-13 00:33:32 +00001099 /* if iocharset not set then load_nls_default
1100 is used by caller */
Joe Perchesb6b38f72010-04-21 03:50:45 +00001101 cFYI(1, "iocharset set to %s", value);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001102 } else {
Steve French63135e02007-07-17 17:34:02 +00001103 printk(KERN_WARNING "CIFS: iocharset name "
1104 "too long.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001105 return 1;
1106 }
Jeff Layton9b9d6b242009-07-31 06:56:09 -04001107 } else if (!strnicmp(data, "uid", 3) && value && *value) {
1108 vol->linux_uid = simple_strtoul(value, &value, 0);
1109 uid_specified = true;
Jeff Laytonbd763312011-01-11 10:33:24 -05001110 } else if (!strnicmp(data, "cruid", 5) && value && *value) {
1111 vol->cred_uid = simple_strtoul(value, &value, 0);
Jeff Layton9b9d6b242009-07-31 06:56:09 -04001112 } else if (!strnicmp(data, "forceuid", 8)) {
1113 override_uid = 1;
1114 } else if (!strnicmp(data, "noforceuid", 10)) {
1115 override_uid = 0;
1116 } else if (!strnicmp(data, "gid", 3) && value && *value) {
1117 vol->linux_gid = simple_strtoul(value, &value, 0);
1118 gid_specified = true;
1119 } else if (!strnicmp(data, "forcegid", 8)) {
1120 override_gid = 1;
1121 } else if (!strnicmp(data, "noforcegid", 10)) {
1122 override_gid = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001123 } else if (strnicmp(data, "file_mode", 4) == 0) {
1124 if (value && *value) {
1125 vol->file_mode =
1126 simple_strtoul(value, &value, 0);
1127 }
1128 } else if (strnicmp(data, "dir_mode", 4) == 0) {
1129 if (value && *value) {
1130 vol->dir_mode =
1131 simple_strtoul(value, &value, 0);
1132 }
1133 } else if (strnicmp(data, "dirmode", 4) == 0) {
1134 if (value && *value) {
1135 vol->dir_mode =
1136 simple_strtoul(value, &value, 0);
1137 }
1138 } else if (strnicmp(data, "port", 4) == 0) {
1139 if (value && *value) {
1140 vol->port =
1141 simple_strtoul(value, &value, 0);
1142 }
1143 } else if (strnicmp(data, "rsize", 5) == 0) {
1144 if (value && *value) {
1145 vol->rsize =
1146 simple_strtoul(value, &value, 0);
1147 }
1148 } else if (strnicmp(data, "wsize", 5) == 0) {
1149 if (value && *value) {
1150 vol->wsize =
1151 simple_strtoul(value, &value, 0);
1152 }
1153 } else if (strnicmp(data, "sockopt", 5) == 0) {
Steve French6a5fa2362010-01-01 01:28:43 +00001154 if (!value || !*value) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00001155 cERROR(1, "no socket option specified");
Steve French6a5fa2362010-01-01 01:28:43 +00001156 continue;
1157 } else if (strnicmp(value, "TCP_NODELAY", 11) == 0) {
1158 vol->sockopt_tcp_nodelay = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001159 }
1160 } else if (strnicmp(data, "netbiosname", 4) == 0) {
1161 if (!value || !*value || (*value == ' ')) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00001162 cFYI(1, "invalid (empty) netbiosname");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001163 } else {
Jeff Layton1397f2e2011-01-07 11:30:28 -05001164 memset(vol->source_rfc1001_name, 0x20,
1165 RFC1001_NAME_LEN);
1166 /*
1167 * FIXME: are there cases in which a comma can
1168 * be valid in workstation netbios name (and
1169 * need special handling)?
1170 */
1171 for (i = 0; i < RFC1001_NAME_LEN; i++) {
1172 /* don't ucase netbiosname for user */
Steve French50c2f752007-07-13 00:33:32 +00001173 if (value[i] == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001174 break;
Jeff Layton1397f2e2011-01-07 11:30:28 -05001175 vol->source_rfc1001_name[i] = value[i];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001176 }
1177 /* The string has 16th byte zero still from
1178 set at top of the function */
Jeff Layton1397f2e2011-01-07 11:30:28 -05001179 if (i == RFC1001_NAME_LEN && value[i] != 0)
Steve French50c2f752007-07-13 00:33:32 +00001180 printk(KERN_WARNING "CIFS: netbiosname"
1181 " longer than 15 truncated.\n");
Steve Frencha10faeb22005-08-22 21:38:31 -07001182 }
1183 } else if (strnicmp(data, "servern", 7) == 0) {
1184 /* servernetbiosname specified override *SMBSERVER */
1185 if (!value || !*value || (*value == ' ')) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00001186 cFYI(1, "empty server netbiosname specified");
Steve Frencha10faeb22005-08-22 21:38:31 -07001187 } else {
1188 /* last byte, type, is 0x20 for servr type */
Jeff Layton1397f2e2011-01-07 11:30:28 -05001189 memset(vol->target_rfc1001_name, 0x20,
1190 RFC1001_NAME_LEN_WITH_NULL);
Steve Frencha10faeb22005-08-22 21:38:31 -07001191
Steve French50c2f752007-07-13 00:33:32 +00001192 for (i = 0; i < 15; i++) {
Steve Frencha10faeb22005-08-22 21:38:31 -07001193 /* BB are there cases in which a comma can be
Steve French50c2f752007-07-13 00:33:32 +00001194 valid in this workstation netbios name
1195 (and need special handling)? */
Steve Frencha10faeb22005-08-22 21:38:31 -07001196
Steve French50c2f752007-07-13 00:33:32 +00001197 /* user or mount helper must uppercase
1198 the netbiosname */
1199 if (value[i] == 0)
Steve Frencha10faeb22005-08-22 21:38:31 -07001200 break;
1201 else
Steve French50c2f752007-07-13 00:33:32 +00001202 vol->target_rfc1001_name[i] =
1203 value[i];
Steve Frencha10faeb22005-08-22 21:38:31 -07001204 }
1205 /* The string has 16th byte zero still from
1206 set at top of the function */
Jeff Layton1397f2e2011-01-07 11:30:28 -05001207 if (i == RFC1001_NAME_LEN && value[i] != 0)
Steve French50c2f752007-07-13 00:33:32 +00001208 printk(KERN_WARNING "CIFS: server net"
1209 "biosname longer than 15 truncated.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001210 }
Suresh Jayaraman6d20e842010-12-01 14:42:28 +05301211 } else if (strnicmp(data, "actimeo", 7) == 0) {
1212 if (value && *value) {
1213 vol->actimeo = HZ * simple_strtoul(value,
1214 &value, 0);
1215 if (vol->actimeo > CIFS_MAX_ACTIMEO) {
1216 cERROR(1, "CIFS: attribute cache"
1217 "timeout too large");
1218 return 1;
1219 }
1220 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001221 } else if (strnicmp(data, "credentials", 4) == 0) {
1222 /* ignore */
1223 } else if (strnicmp(data, "version", 3) == 0) {
1224 /* ignore */
Steve French50c2f752007-07-13 00:33:32 +00001225 } else if (strnicmp(data, "guest", 5) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001226 /* ignore */
Steve French71a394f2009-06-26 04:07:18 +00001227 } else if (strnicmp(data, "rw", 2) == 0) {
1228 /* ignore */
1229 } else if (strnicmp(data, "ro", 2) == 0) {
1230 /* ignore */
Steve Frenchedf1ae42008-10-29 00:47:57 +00001231 } else if (strnicmp(data, "noblocksend", 11) == 0) {
1232 vol->noblocksnd = 1;
1233 } else if (strnicmp(data, "noautotune", 10) == 0) {
1234 vol->noautotune = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001235 } else if ((strnicmp(data, "suid", 4) == 0) ||
1236 (strnicmp(data, "nosuid", 6) == 0) ||
1237 (strnicmp(data, "exec", 4) == 0) ||
1238 (strnicmp(data, "noexec", 6) == 0) ||
1239 (strnicmp(data, "nodev", 5) == 0) ||
1240 (strnicmp(data, "noauto", 6) == 0) ||
1241 (strnicmp(data, "dev", 3) == 0)) {
1242 /* The mount tool or mount.cifs helper (if present)
Steve French50c2f752007-07-13 00:33:32 +00001243 uses these opts to set flags, and the flags are read
1244 by the kernel vfs layer before we get here (ie
1245 before read super) so there is no point trying to
1246 parse these options again and set anything and it
1247 is ok to just ignore them */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001248 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001249 } else if (strnicmp(data, "hard", 4) == 0) {
1250 vol->retry = 1;
1251 } else if (strnicmp(data, "soft", 4) == 0) {
1252 vol->retry = 0;
1253 } else if (strnicmp(data, "perm", 4) == 0) {
1254 vol->noperm = 0;
1255 } else if (strnicmp(data, "noperm", 6) == 0) {
1256 vol->noperm = 1;
Steve French6a0b4822005-04-28 22:41:05 -07001257 } else if (strnicmp(data, "mapchars", 8) == 0) {
1258 vol->remap = 1;
1259 } else if (strnicmp(data, "nomapchars", 10) == 0) {
1260 vol->remap = 0;
Steve French50c2f752007-07-13 00:33:32 +00001261 } else if (strnicmp(data, "sfu", 3) == 0) {
1262 vol->sfu_emul = 1;
1263 } else if (strnicmp(data, "nosfu", 5) == 0) {
1264 vol->sfu_emul = 0;
Steve French2c1b8612008-10-16 18:35:21 +00001265 } else if (strnicmp(data, "nodfs", 5) == 0) {
1266 vol->nodfs = 1;
Jeremy Allisonac670552005-06-22 17:26:35 -07001267 } else if (strnicmp(data, "posixpaths", 10) == 0) {
1268 vol->posix_paths = 1;
1269 } else if (strnicmp(data, "noposixpaths", 12) == 0) {
1270 vol->posix_paths = 0;
Steve Frenchc18c8422007-07-18 23:21:09 +00001271 } else if (strnicmp(data, "nounix", 6) == 0) {
1272 vol->no_linux_ext = 1;
1273 } else if (strnicmp(data, "nolinux", 7) == 0) {
1274 vol->no_linux_ext = 1;
Steve French50c2f752007-07-13 00:33:32 +00001275 } else if ((strnicmp(data, "nocase", 6) == 0) ||
Steve Frencha10faeb22005-08-22 21:38:31 -07001276 (strnicmp(data, "ignorecase", 10) == 0)) {
Steve French50c2f752007-07-13 00:33:32 +00001277 vol->nocase = 1;
Jeff Laytonf636a342010-07-26 10:29:58 -04001278 } else if (strnicmp(data, "mand", 4) == 0) {
1279 /* ignore */
1280 } else if (strnicmp(data, "nomand", 6) == 0) {
1281 /* ignore */
1282 } else if (strnicmp(data, "_netdev", 7) == 0) {
1283 /* ignore */
Steve Frenchc46fa8a2005-08-18 20:49:57 -07001284 } else if (strnicmp(data, "brl", 3) == 0) {
1285 vol->nobrl = 0;
Steve French50c2f752007-07-13 00:33:32 +00001286 } else if ((strnicmp(data, "nobrl", 5) == 0) ||
Steve French1c955182005-08-30 20:58:07 -07001287 (strnicmp(data, "nolock", 6) == 0)) {
Steve Frenchc46fa8a2005-08-18 20:49:57 -07001288 vol->nobrl = 1;
Steve Frenchd3485d32005-08-19 11:04:29 -07001289 /* turn off mandatory locking in mode
1290 if remote locking is turned off since the
1291 local vfs will do advisory */
Steve French50c2f752007-07-13 00:33:32 +00001292 if (vol->file_mode ==
1293 (S_IALLUGO & ~(S_ISUID | S_IXGRP)))
Steve Frenchd3485d32005-08-19 11:04:29 -07001294 vol->file_mode = S_IALLUGO;
Steve French13a6e422008-12-02 17:24:33 +00001295 } else if (strnicmp(data, "forcemandatorylock", 9) == 0) {
1296 /* will take the shorter form "forcemand" as well */
1297 /* This mount option will force use of mandatory
1298 (DOS/Windows style) byte range locks, instead of
1299 using posix advisory byte range locks, even if the
1300 Unix extensions are available and posix locks would
1301 be supported otherwise. If Unix extensions are not
1302 negotiated this has no effect since mandatory locks
1303 would be used (mandatory locks is all that those
1304 those servers support) */
1305 vol->mand_lock = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001306 } else if (strnicmp(data, "setuids", 7) == 0) {
1307 vol->setuids = 1;
1308 } else if (strnicmp(data, "nosetuids", 9) == 0) {
1309 vol->setuids = 0;
Jeff Laytond0a9c072008-05-12 22:23:49 +00001310 } else if (strnicmp(data, "dynperm", 7) == 0) {
1311 vol->dynperm = true;
1312 } else if (strnicmp(data, "nodynperm", 9) == 0) {
1313 vol->dynperm = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001314 } else if (strnicmp(data, "nohard", 6) == 0) {
1315 vol->retry = 0;
1316 } else if (strnicmp(data, "nosoft", 6) == 0) {
1317 vol->retry = 1;
1318 } else if (strnicmp(data, "nointr", 6) == 0) {
1319 vol->intr = 0;
1320 } else if (strnicmp(data, "intr", 4) == 0) {
1321 vol->intr = 1;
Steve Frenchbe652442009-02-23 15:21:59 +00001322 } else if (strnicmp(data, "nostrictsync", 12) == 0) {
1323 vol->nostrictsync = 1;
1324 } else if (strnicmp(data, "strictsync", 10) == 0) {
1325 vol->nostrictsync = 0;
Steve French50c2f752007-07-13 00:33:32 +00001326 } else if (strnicmp(data, "serverino", 7) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001327 vol->server_ino = 1;
Steve French50c2f752007-07-13 00:33:32 +00001328 } else if (strnicmp(data, "noserverino", 9) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001329 vol->server_ino = 0;
Steve French50c2f752007-07-13 00:33:32 +00001330 } else if (strnicmp(data, "cifsacl", 7) == 0) {
Steve French0a4b92c2006-01-12 15:44:21 -08001331 vol->cifs_acl = 1;
1332 } else if (strnicmp(data, "nocifsacl", 9) == 0) {
1333 vol->cifs_acl = 0;
Steve French50c2f752007-07-13 00:33:32 +00001334 } else if (strnicmp(data, "acl", 3) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001335 vol->no_psx_acl = 0;
Steve French50c2f752007-07-13 00:33:32 +00001336 } else if (strnicmp(data, "noacl", 5) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001337 vol->no_psx_acl = 1;
Steve French84210e92008-10-23 04:42:37 +00001338 } else if (strnicmp(data, "locallease", 6) == 0) {
1339 vol->local_lease = 1;
Steve French50c2f752007-07-13 00:33:32 +00001340 } else if (strnicmp(data, "sign", 4) == 0) {
Steve French750d1152006-06-27 06:28:30 +00001341 vol->secFlg |= CIFSSEC_MUST_SIGN;
Steve French95b1cb92008-05-15 16:44:38 +00001342 } else if (strnicmp(data, "seal", 4) == 0) {
1343 /* we do not do the following in secFlags because seal
1344 is a per tree connection (mount) not a per socket
1345 or per-smb connection option in the protocol */
1346 /* vol->secFlg |= CIFSSEC_MUST_SEAL; */
1347 vol->seal = 1;
Steve French50c2f752007-07-13 00:33:32 +00001348 } else if (strnicmp(data, "direct", 6) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001349 vol->direct_io = 1;
Steve French50c2f752007-07-13 00:33:32 +00001350 } else if (strnicmp(data, "forcedirectio", 13) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001351 vol->direct_io = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001352 } else if (strnicmp(data, "noac", 4) == 0) {
Steve French50c2f752007-07-13 00:33:32 +00001353 printk(KERN_WARNING "CIFS: Mount option noac not "
1354 "supported. Instead set "
1355 "/proc/fs/cifs/LookupCacheEnabled to 0\n");
Suresh Jayaramanfa1df752010-07-05 18:13:36 +05301356 } else if (strnicmp(data, "fsc", 3) == 0) {
Suresh Jayaraman607a5692010-11-24 17:49:05 +05301357#ifndef CONFIG_CIFS_FSCACHE
1358 cERROR(1, "FS-Cache support needs CONFIG_CIFS_FSCACHE"
1359 "kernel config option set");
1360 return 1;
1361#endif
Suresh Jayaramanfa1df752010-07-05 18:13:36 +05301362 vol->fsc = true;
Stefan Metzmacher736a3322010-07-30 14:56:00 +02001363 } else if (strnicmp(data, "mfsymlinks", 10) == 0) {
1364 vol->mfsymlinks = true;
Jeff Layton0eb8a132010-10-06 19:51:12 -04001365 } else if (strnicmp(data, "multiuser", 8) == 0) {
1366 vol->multiuser = true;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001367 } else
Steve French50c2f752007-07-13 00:33:32 +00001368 printk(KERN_WARNING "CIFS: Unknown mount option %s\n",
1369 data);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001370 }
1371 if (vol->UNC == NULL) {
Steve French4523cc32007-04-30 20:13:06 +00001372 if (devname == NULL) {
Steve French50c2f752007-07-13 00:33:32 +00001373 printk(KERN_WARNING "CIFS: Missing UNC name for mount "
1374 "target\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001375 return 1;
1376 }
1377 if ((temp_len = strnlen(devname, 300)) < 300) {
Steve French50c2f752007-07-13 00:33:32 +00001378 vol->UNC = kmalloc(temp_len+1, GFP_KERNEL);
Steve French4523cc32007-04-30 20:13:06 +00001379 if (vol->UNC == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001380 return 1;
Steve French50c2f752007-07-13 00:33:32 +00001381 strcpy(vol->UNC, devname);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001382 if (strncmp(vol->UNC, "//", 2) == 0) {
1383 vol->UNC[0] = '\\';
1384 vol->UNC[1] = '\\';
1385 } else if (strncmp(vol->UNC, "\\\\", 2) != 0) {
Steve French50c2f752007-07-13 00:33:32 +00001386 printk(KERN_WARNING "CIFS: UNC Path does not "
1387 "begin with // or \\\\ \n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001388 return 1;
1389 }
Igor Mammedov7c5e6282008-05-08 20:48:42 +00001390 value = strpbrk(vol->UNC+2, "/\\");
1391 if (value)
1392 *value = '\\';
Linus Torvalds1da177e2005-04-16 15:20:36 -07001393 } else {
1394 printk(KERN_WARNING "CIFS: UNC name too long\n");
1395 return 1;
1396 }
1397 }
Jeff Layton0eb8a132010-10-06 19:51:12 -04001398
1399 if (vol->multiuser && !(vol->secFlg & CIFSSEC_MAY_KRB5)) {
1400 cERROR(1, "Multiuser mounts currently require krb5 "
1401 "authentication!");
1402 return 1;
1403 }
1404
Steve Frenchfb8c4b12007-07-10 01:16:18 +00001405 if (vol->UNCip == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001406 vol->UNCip = &vol->UNC[2];
1407
Jeff Layton9b9d6b242009-07-31 06:56:09 -04001408 if (uid_specified)
1409 vol->override_uid = override_uid;
1410 else if (override_uid == 1)
1411 printk(KERN_NOTICE "CIFS: ignoring forceuid mount option "
1412 "specified with no uid= option.\n");
1413
1414 if (gid_specified)
1415 vol->override_gid = override_gid;
1416 else if (override_gid == 1)
1417 printk(KERN_NOTICE "CIFS: ignoring forcegid mount option "
1418 "specified with no gid= option.\n");
1419
Linus Torvalds1da177e2005-04-16 15:20:36 -07001420 return 0;
1421}
1422
Ben Greear3eb9a882010-09-01 17:06:02 -07001423/** Returns true if srcaddr isn't specified and rhs isn't
1424 * specified, or if srcaddr is specified and
1425 * matches the IP address of the rhs argument.
1426 */
Jeff Layton45151482010-07-06 20:43:02 -04001427static bool
Ben Greear3eb9a882010-09-01 17:06:02 -07001428srcip_matches(struct sockaddr *srcaddr, struct sockaddr *rhs)
1429{
1430 switch (srcaddr->sa_family) {
1431 case AF_UNSPEC:
1432 return (rhs->sa_family == AF_UNSPEC);
1433 case AF_INET: {
1434 struct sockaddr_in *saddr4 = (struct sockaddr_in *)srcaddr;
1435 struct sockaddr_in *vaddr4 = (struct sockaddr_in *)rhs;
1436 return (saddr4->sin_addr.s_addr == vaddr4->sin_addr.s_addr);
1437 }
1438 case AF_INET6: {
1439 struct sockaddr_in6 *saddr6 = (struct sockaddr_in6 *)srcaddr;
1440 struct sockaddr_in6 *vaddr6 = (struct sockaddr_in6 *)&rhs;
1441 return ipv6_addr_equal(&saddr6->sin6_addr, &vaddr6->sin6_addr);
1442 }
1443 default:
1444 WARN_ON(1);
1445 return false; /* don't expect to be here */
1446 }
1447}
1448
Pavel Shilovsky4b886132010-12-13 22:18:07 +03001449/*
1450 * If no port is specified in addr structure, we try to match with 445 port
1451 * and if it fails - with 139 ports. It should be called only if address
1452 * families of server and addr are equal.
1453 */
1454static bool
1455match_port(struct TCP_Server_Info *server, struct sockaddr *addr)
1456{
1457 unsigned short int port, *sport;
1458
1459 switch (addr->sa_family) {
1460 case AF_INET:
1461 sport = &((struct sockaddr_in *) &server->dstaddr)->sin_port;
1462 port = ((struct sockaddr_in *) addr)->sin_port;
1463 break;
1464 case AF_INET6:
1465 sport = &((struct sockaddr_in6 *) &server->dstaddr)->sin6_port;
1466 port = ((struct sockaddr_in6 *) addr)->sin6_port;
1467 break;
1468 default:
1469 WARN_ON(1);
1470 return false;
1471 }
1472
1473 if (!port) {
1474 port = htons(CIFS_PORT);
1475 if (port == *sport)
1476 return true;
1477
1478 port = htons(RFC1001_PORT);
1479 }
1480
1481 return port == *sport;
1482}
Ben Greear3eb9a882010-09-01 17:06:02 -07001483
1484static bool
1485match_address(struct TCP_Server_Info *server, struct sockaddr *addr,
1486 struct sockaddr *srcaddr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001487{
Jeff Layton45151482010-07-06 20:43:02 -04001488 switch (addr->sa_family) {
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03001489 case AF_INET: {
1490 struct sockaddr_in *addr4 = (struct sockaddr_in *)addr;
1491 struct sockaddr_in *srv_addr4 =
1492 (struct sockaddr_in *)&server->dstaddr;
1493
1494 if (addr4->sin_addr.s_addr != srv_addr4->sin_addr.s_addr)
Jeff Layton45151482010-07-06 20:43:02 -04001495 return false;
Jeff Layton45151482010-07-06 20:43:02 -04001496 break;
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03001497 }
1498 case AF_INET6: {
1499 struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr;
1500 struct sockaddr_in6 *srv_addr6 =
1501 (struct sockaddr_in6 *)&server->dstaddr;
1502
Jeff Layton45151482010-07-06 20:43:02 -04001503 if (!ipv6_addr_equal(&addr6->sin6_addr,
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03001504 &srv_addr6->sin6_addr))
Jeff Layton45151482010-07-06 20:43:02 -04001505 return false;
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03001506 if (addr6->sin6_scope_id != srv_addr6->sin6_scope_id)
Jeff Layton45151482010-07-06 20:43:02 -04001507 return false;
Jeff Layton45151482010-07-06 20:43:02 -04001508 break;
1509 }
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03001510 default:
1511 WARN_ON(1);
1512 return false; /* don't expect to be here */
1513 }
Jeff Layton45151482010-07-06 20:43:02 -04001514
Ben Greear3eb9a882010-09-01 17:06:02 -07001515 if (!srcip_matches(srcaddr, (struct sockaddr *)&server->srcaddr))
1516 return false;
1517
Jeff Layton45151482010-07-06 20:43:02 -04001518 return true;
1519}
1520
Jeff Laytondaf5b0b2010-07-06 20:43:02 -04001521static bool
1522match_security(struct TCP_Server_Info *server, struct smb_vol *vol)
1523{
1524 unsigned int secFlags;
1525
1526 if (vol->secFlg & (~(CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL)))
1527 secFlags = vol->secFlg;
1528 else
1529 secFlags = global_secflags | vol->secFlg;
1530
1531 switch (server->secType) {
1532 case LANMAN:
1533 if (!(secFlags & (CIFSSEC_MAY_LANMAN|CIFSSEC_MAY_PLNTXT)))
1534 return false;
1535 break;
1536 case NTLMv2:
1537 if (!(secFlags & CIFSSEC_MAY_NTLMV2))
1538 return false;
1539 break;
1540 case NTLM:
1541 if (!(secFlags & CIFSSEC_MAY_NTLM))
1542 return false;
1543 break;
1544 case Kerberos:
1545 if (!(secFlags & CIFSSEC_MAY_KRB5))
1546 return false;
1547 break;
1548 case RawNTLMSSP:
1549 if (!(secFlags & CIFSSEC_MAY_NTLMSSP))
1550 return false;
1551 break;
1552 default:
1553 /* shouldn't happen */
1554 return false;
1555 }
1556
1557 /* now check if signing mode is acceptible */
1558 if ((secFlags & CIFSSEC_MAY_SIGN) == 0 &&
1559 (server->secMode & SECMODE_SIGN_REQUIRED))
1560 return false;
1561 else if (((secFlags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN) &&
1562 (server->secMode &
1563 (SECMODE_SIGN_ENABLED|SECMODE_SIGN_REQUIRED)) == 0)
1564 return false;
1565
1566 return true;
1567}
1568
Jeff Layton45151482010-07-06 20:43:02 -04001569static struct TCP_Server_Info *
Jeff Laytondaf5b0b2010-07-06 20:43:02 -04001570cifs_find_tcp_session(struct sockaddr *addr, struct smb_vol *vol)
Jeff Layton45151482010-07-06 20:43:02 -04001571{
Jeff Laytone7ddee92008-11-14 13:44:38 -05001572 struct TCP_Server_Info *server;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001573
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05301574 spin_lock(&cifs_tcp_ses_lock);
Jeff Layton45151482010-07-06 20:43:02 -04001575 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
Ben Greear3eb9a882010-09-01 17:06:02 -07001576 if (!match_address(server, addr,
1577 (struct sockaddr *)&vol->srcaddr))
Jeff Layton45151482010-07-06 20:43:02 -04001578 continue;
Steve French50c2f752007-07-13 00:33:32 +00001579
Pavel Shilovsky4b886132010-12-13 22:18:07 +03001580 if (!match_port(server, addr))
1581 continue;
1582
Jeff Laytondaf5b0b2010-07-06 20:43:02 -04001583 if (!match_security(server, vol))
1584 continue;
1585
Jeff Laytone7ddee92008-11-14 13:44:38 -05001586 ++server->srv_count;
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05301587 spin_unlock(&cifs_tcp_ses_lock);
Joe Perchesb6b38f72010-04-21 03:50:45 +00001588 cFYI(1, "Existing tcp session with server found");
Jeff Laytone7ddee92008-11-14 13:44:38 -05001589 return server;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001590 }
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05301591 spin_unlock(&cifs_tcp_ses_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001592 return NULL;
1593}
1594
Jeff Layton14fbf502008-11-14 13:53:46 -05001595static void
Jeff Laytone7ddee92008-11-14 13:44:38 -05001596cifs_put_tcp_session(struct TCP_Server_Info *server)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001597{
Jeff Laytone7ddee92008-11-14 13:44:38 -05001598 struct task_struct *task;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001599
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05301600 spin_lock(&cifs_tcp_ses_lock);
Jeff Laytone7ddee92008-11-14 13:44:38 -05001601 if (--server->srv_count > 0) {
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05301602 spin_unlock(&cifs_tcp_ses_lock);
Jeff Laytone7ddee92008-11-14 13:44:38 -05001603 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001604 }
Steve Frenchdea570e02008-05-06 22:05:51 +00001605
Jeff Laytone7ddee92008-11-14 13:44:38 -05001606 list_del_init(&server->tcp_ses_list);
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05301607 spin_unlock(&cifs_tcp_ses_lock);
Jeff Laytone7ddee92008-11-14 13:44:38 -05001608
Jeff Laytonc74093b2011-01-11 07:24:23 -05001609 cancel_delayed_work_sync(&server->echo);
1610
Jeff Laytone7ddee92008-11-14 13:44:38 -05001611 spin_lock(&GlobalMid_Lock);
1612 server->tcpStatus = CifsExiting;
1613 spin_unlock(&GlobalMid_Lock);
1614
Shirish Pargaonkard2b91522010-10-21 14:25:08 -05001615 cifs_crypto_shash_release(server);
Suresh Jayaraman488f1d2d2010-07-05 18:12:15 +05301616 cifs_fscache_release_client_cookie(server);
1617
Shirish Pargaonkar21e73392010-10-21 06:42:55 -05001618 kfree(server->session_key.response);
1619 server->session_key.response = NULL;
1620 server->session_key.len = 0;
1621
Jeff Laytone7ddee92008-11-14 13:44:38 -05001622 task = xchg(&server->tsk, NULL);
1623 if (task)
1624 force_sig(SIGKILL, task);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001625}
1626
Jeff Layton63c038c2008-12-01 18:41:46 -05001627static struct TCP_Server_Info *
1628cifs_get_tcp_session(struct smb_vol *volume_info)
1629{
1630 struct TCP_Server_Info *tcp_ses = NULL;
Jeff Laytona9ac49d2009-01-22 14:43:21 -05001631 struct sockaddr_storage addr;
Jeff Layton63c038c2008-12-01 18:41:46 -05001632 struct sockaddr_in *sin_server = (struct sockaddr_in *) &addr;
1633 struct sockaddr_in6 *sin_server6 = (struct sockaddr_in6 *) &addr;
1634 int rc;
1635
Jeff Laytona9ac49d2009-01-22 14:43:21 -05001636 memset(&addr, 0, sizeof(struct sockaddr_storage));
Jeff Layton63c038c2008-12-01 18:41:46 -05001637
Joe Perchesb6b38f72010-04-21 03:50:45 +00001638 cFYI(1, "UNC: %s ip: %s", volume_info->UNC, volume_info->UNCip);
Jeff Layton1e68b2b2009-06-11 10:27:30 -04001639
Jeff Layton63c038c2008-12-01 18:41:46 -05001640 if (volume_info->UNCip && volume_info->UNC) {
Jeff Layton50d97162010-07-06 20:43:01 -04001641 rc = cifs_fill_sockaddr((struct sockaddr *)&addr,
1642 volume_info->UNCip,
David Howells67b76262010-07-22 18:33:01 +01001643 strlen(volume_info->UNCip),
Jeff Layton50d97162010-07-06 20:43:01 -04001644 volume_info->port);
Jeff Layton1e68b2b2009-06-11 10:27:30 -04001645 if (!rc) {
Jeff Layton63c038c2008-12-01 18:41:46 -05001646 /* we failed translating address */
1647 rc = -EINVAL;
1648 goto out_err;
1649 }
Jeff Layton63c038c2008-12-01 18:41:46 -05001650 } else if (volume_info->UNCip) {
1651 /* BB using ip addr as tcp_ses name to connect to the
1652 DFS root below */
Joe Perchesb6b38f72010-04-21 03:50:45 +00001653 cERROR(1, "Connecting to DFS root not implemented yet");
Jeff Layton63c038c2008-12-01 18:41:46 -05001654 rc = -EINVAL;
1655 goto out_err;
1656 } else /* which tcp_sess DFS root would we conect to */ {
Joe Perchesb6b38f72010-04-21 03:50:45 +00001657 cERROR(1, "CIFS mount error: No UNC path (e.g. -o "
1658 "unc=//192.168.1.100/public) specified");
Jeff Layton63c038c2008-12-01 18:41:46 -05001659 rc = -EINVAL;
1660 goto out_err;
1661 }
1662
1663 /* see if we already have a matching tcp_ses */
Jeff Laytondaf5b0b2010-07-06 20:43:02 -04001664 tcp_ses = cifs_find_tcp_session((struct sockaddr *)&addr, volume_info);
Jeff Layton63c038c2008-12-01 18:41:46 -05001665 if (tcp_ses)
1666 return tcp_ses;
1667
1668 tcp_ses = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL);
1669 if (!tcp_ses) {
1670 rc = -ENOMEM;
1671 goto out_err;
1672 }
1673
Shirish Pargaonkard2b91522010-10-21 14:25:08 -05001674 rc = cifs_crypto_shash_allocate(tcp_ses);
1675 if (rc) {
1676 cERROR(1, "could not setup hash structures rc %d", rc);
1677 goto out_err;
1678 }
1679
Jeff Layton63c038c2008-12-01 18:41:46 -05001680 tcp_ses->hostname = extract_hostname(volume_info->UNC);
1681 if (IS_ERR(tcp_ses->hostname)) {
1682 rc = PTR_ERR(tcp_ses->hostname);
Shirish Pargaonkarf7c54452010-10-26 18:10:24 -05001683 goto out_err_crypto_release;
Jeff Layton63c038c2008-12-01 18:41:46 -05001684 }
1685
1686 tcp_ses->noblocksnd = volume_info->noblocksnd;
1687 tcp_ses->noautotune = volume_info->noautotune;
Steve French6a5fa2362010-01-01 01:28:43 +00001688 tcp_ses->tcp_nodelay = volume_info->sockopt_tcp_nodelay;
Jeff Layton63c038c2008-12-01 18:41:46 -05001689 atomic_set(&tcp_ses->inFlight, 0);
1690 init_waitqueue_head(&tcp_ses->response_q);
1691 init_waitqueue_head(&tcp_ses->request_q);
1692 INIT_LIST_HEAD(&tcp_ses->pending_mid_q);
1693 mutex_init(&tcp_ses->srv_mutex);
1694 memcpy(tcp_ses->workstation_RFC1001_name,
1695 volume_info->source_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL);
1696 memcpy(tcp_ses->server_RFC1001_name,
1697 volume_info->target_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL);
Shirish Pargaonkar5d0d2882010-10-13 18:15:00 -05001698 tcp_ses->session_estab = false;
Jeff Layton63c038c2008-12-01 18:41:46 -05001699 tcp_ses->sequence_number = 0;
Steve Frenchfda35942011-01-20 18:06:34 +00001700 tcp_ses->lstrp = jiffies;
Jeff Layton63c038c2008-12-01 18:41:46 -05001701 INIT_LIST_HEAD(&tcp_ses->tcp_ses_list);
1702 INIT_LIST_HEAD(&tcp_ses->smb_ses_list);
Jeff Laytonc74093b2011-01-11 07:24:23 -05001703 INIT_DELAYED_WORK(&tcp_ses->echo, cifs_echo_request);
Jeff Layton63c038c2008-12-01 18:41:46 -05001704
1705 /*
1706 * at this point we are the only ones with the pointer
1707 * to the struct since the kernel thread not created yet
1708 * no need to spinlock this init of tcpStatus or srv_count
1709 */
1710 tcp_ses->tcpStatus = CifsNew;
Ben Greear3eb9a882010-09-01 17:06:02 -07001711 memcpy(&tcp_ses->srcaddr, &volume_info->srcaddr,
1712 sizeof(tcp_ses->srcaddr));
Jeff Layton63c038c2008-12-01 18:41:46 -05001713 ++tcp_ses->srv_count;
1714
Jeff Laytona9ac49d2009-01-22 14:43:21 -05001715 if (addr.ss_family == AF_INET6) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00001716 cFYI(1, "attempting ipv6 connect");
Jeff Layton63c038c2008-12-01 18:41:46 -05001717 /* BB should we allow ipv6 on port 139? */
1718 /* other OS never observed in Wild doing 139 with v6 */
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03001719 memcpy(&tcp_ses->dstaddr, sin_server6,
1720 sizeof(struct sockaddr_in6));
1721 } else
1722 memcpy(&tcp_ses->dstaddr, sin_server,
1723 sizeof(struct sockaddr_in));
1724
1725 rc = ip_connect(tcp_ses);
Jeff Layton63c038c2008-12-01 18:41:46 -05001726 if (rc < 0) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00001727 cERROR(1, "Error connecting to socket. Aborting operation");
Shirish Pargaonkarf7c54452010-10-26 18:10:24 -05001728 goto out_err_crypto_release;
Jeff Layton63c038c2008-12-01 18:41:46 -05001729 }
1730
1731 /*
1732 * since we're in a cifs function already, we know that
1733 * this will succeed. No need for try_module_get().
1734 */
1735 __module_get(THIS_MODULE);
1736 tcp_ses->tsk = kthread_run((void *)(void *)cifs_demultiplex_thread,
1737 tcp_ses, "cifsd");
1738 if (IS_ERR(tcp_ses->tsk)) {
1739 rc = PTR_ERR(tcp_ses->tsk);
Joe Perchesb6b38f72010-04-21 03:50:45 +00001740 cERROR(1, "error %d create cifsd thread", rc);
Jeff Layton63c038c2008-12-01 18:41:46 -05001741 module_put(THIS_MODULE);
Shirish Pargaonkarf7c54452010-10-26 18:10:24 -05001742 goto out_err_crypto_release;
Jeff Layton63c038c2008-12-01 18:41:46 -05001743 }
1744
1745 /* thread spawned, put it on the list */
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05301746 spin_lock(&cifs_tcp_ses_lock);
Jeff Layton63c038c2008-12-01 18:41:46 -05001747 list_add(&tcp_ses->tcp_ses_list, &cifs_tcp_ses_list);
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05301748 spin_unlock(&cifs_tcp_ses_lock);
Jeff Layton63c038c2008-12-01 18:41:46 -05001749
Suresh Jayaraman488f1d2d2010-07-05 18:12:15 +05301750 cifs_fscache_get_client_cookie(tcp_ses);
1751
Jeff Laytonc74093b2011-01-11 07:24:23 -05001752 /* queue echo request delayed work */
1753 queue_delayed_work(system_nrt_wq, &tcp_ses->echo, SMB_ECHO_INTERVAL);
1754
Jeff Layton63c038c2008-12-01 18:41:46 -05001755 return tcp_ses;
1756
Shirish Pargaonkarf7c54452010-10-26 18:10:24 -05001757out_err_crypto_release:
Shirish Pargaonkard2b91522010-10-21 14:25:08 -05001758 cifs_crypto_shash_release(tcp_ses);
1759
Jeff Layton63c038c2008-12-01 18:41:46 -05001760out_err:
1761 if (tcp_ses) {
Steve French8347a5c2009-10-06 18:31:29 +00001762 if (!IS_ERR(tcp_ses->hostname))
1763 kfree(tcp_ses->hostname);
Jeff Layton63c038c2008-12-01 18:41:46 -05001764 if (tcp_ses->ssocket)
1765 sock_release(tcp_ses->ssocket);
1766 kfree(tcp_ses);
1767 }
1768 return ERR_PTR(rc);
1769}
1770
Linus Torvalds1da177e2005-04-16 15:20:36 -07001771static struct cifsSesInfo *
Jeff Layton4ff67b72010-07-06 20:43:02 -04001772cifs_find_smb_ses(struct TCP_Server_Info *server, struct smb_vol *vol)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001773{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001774 struct cifsSesInfo *ses;
1775
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05301776 spin_lock(&cifs_tcp_ses_lock);
Jeff Layton4ff67b72010-07-06 20:43:02 -04001777 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
1778 switch (server->secType) {
1779 case Kerberos:
Jeff Layton3e4b3e12010-07-19 18:00:17 -04001780 if (vol->cred_uid != ses->cred_uid)
Jeff Layton4ff67b72010-07-06 20:43:02 -04001781 continue;
1782 break;
1783 default:
1784 /* anything else takes username/password */
1785 if (strncmp(ses->userName, vol->username,
1786 MAX_USERNAME_SIZE))
1787 continue;
1788 if (strlen(vol->username) != 0 &&
Jeff Layton24e6cf92010-08-23 11:38:04 -04001789 ses->password != NULL &&
Jeff Laytonfc87a402010-08-18 13:13:39 -04001790 strncmp(ses->password,
1791 vol->password ? vol->password : "",
Jeff Layton4ff67b72010-07-06 20:43:02 -04001792 MAX_PASSWORD_SIZE))
1793 continue;
1794 }
Jeff Layton14fbf502008-11-14 13:53:46 -05001795 ++ses->ses_count;
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05301796 spin_unlock(&cifs_tcp_ses_lock);
Jeff Layton14fbf502008-11-14 13:53:46 -05001797 return ses;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001798 }
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05301799 spin_unlock(&cifs_tcp_ses_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001800 return NULL;
1801}
1802
Jeff Layton14fbf502008-11-14 13:53:46 -05001803static void
1804cifs_put_smb_ses(struct cifsSesInfo *ses)
1805{
1806 int xid;
1807 struct TCP_Server_Info *server = ses->server;
1808
Jeff Layton36988c72010-04-24 07:57:43 -04001809 cFYI(1, "%s: ses_count=%d\n", __func__, ses->ses_count);
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05301810 spin_lock(&cifs_tcp_ses_lock);
Jeff Layton14fbf502008-11-14 13:53:46 -05001811 if (--ses->ses_count > 0) {
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05301812 spin_unlock(&cifs_tcp_ses_lock);
Jeff Layton14fbf502008-11-14 13:53:46 -05001813 return;
1814 }
1815
1816 list_del_init(&ses->smb_ses_list);
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05301817 spin_unlock(&cifs_tcp_ses_lock);
Jeff Layton14fbf502008-11-14 13:53:46 -05001818
1819 if (ses->status == CifsGood) {
1820 xid = GetXid();
1821 CIFSSMBLogoff(xid, ses);
1822 _FreeXid(xid);
1823 }
1824 sesInfoFree(ses);
1825 cifs_put_tcp_session(server);
1826}
1827
Jeff Layton36988c72010-04-24 07:57:43 -04001828static struct cifsSesInfo *
1829cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info)
1830{
1831 int rc = -ENOMEM, xid;
1832 struct cifsSesInfo *ses;
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03001833 struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr;
1834 struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr;
Jeff Layton36988c72010-04-24 07:57:43 -04001835
1836 xid = GetXid();
1837
Jeff Layton4ff67b72010-07-06 20:43:02 -04001838 ses = cifs_find_smb_ses(server, volume_info);
Jeff Layton36988c72010-04-24 07:57:43 -04001839 if (ses) {
1840 cFYI(1, "Existing smb sess found (status=%d)", ses->status);
1841
Jeff Layton36988c72010-04-24 07:57:43 -04001842 mutex_lock(&ses->session_mutex);
Jeff Layton198b5682010-04-24 07:57:48 -04001843 rc = cifs_negotiate_protocol(xid, ses);
1844 if (rc) {
1845 mutex_unlock(&ses->session_mutex);
1846 /* problem -- put our ses reference */
1847 cifs_put_smb_ses(ses);
1848 FreeXid(xid);
1849 return ERR_PTR(rc);
1850 }
Jeff Layton36988c72010-04-24 07:57:43 -04001851 if (ses->need_reconnect) {
1852 cFYI(1, "Session needs reconnect");
1853 rc = cifs_setup_session(xid, ses,
1854 volume_info->local_nls);
1855 if (rc) {
1856 mutex_unlock(&ses->session_mutex);
1857 /* problem -- put our reference */
1858 cifs_put_smb_ses(ses);
1859 FreeXid(xid);
1860 return ERR_PTR(rc);
1861 }
1862 }
1863 mutex_unlock(&ses->session_mutex);
Jeff Layton460cf342010-09-14 11:38:24 -04001864
1865 /* existing SMB ses has a server reference already */
1866 cifs_put_tcp_session(server);
Jeff Layton36988c72010-04-24 07:57:43 -04001867 FreeXid(xid);
1868 return ses;
1869 }
1870
1871 cFYI(1, "Existing smb sess not found");
1872 ses = sesInfoAlloc();
1873 if (ses == NULL)
1874 goto get_ses_fail;
1875
1876 /* new SMB session uses our server ref */
1877 ses->server = server;
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03001878 if (server->dstaddr.ss_family == AF_INET6)
1879 sprintf(ses->serverName, "%pI6", &addr6->sin6_addr);
Jeff Layton36988c72010-04-24 07:57:43 -04001880 else
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03001881 sprintf(ses->serverName, "%pI4", &addr->sin_addr);
Jeff Layton36988c72010-04-24 07:57:43 -04001882
1883 if (volume_info->username)
1884 strncpy(ses->userName, volume_info->username,
1885 MAX_USERNAME_SIZE);
1886
1887 /* volume_info->password freed at unmount */
1888 if (volume_info->password) {
1889 ses->password = kstrdup(volume_info->password, GFP_KERNEL);
1890 if (!ses->password)
1891 goto get_ses_fail;
1892 }
1893 if (volume_info->domainname) {
Shirish Pargaonkard3686d52010-10-28 09:53:07 -05001894 ses->domainName = kstrdup(volume_info->domainname, GFP_KERNEL);
1895 if (!ses->domainName)
1896 goto get_ses_fail;
Jeff Layton36988c72010-04-24 07:57:43 -04001897 }
Jeff Layton3e4b3e12010-07-19 18:00:17 -04001898 ses->cred_uid = volume_info->cred_uid;
Jeff Layton36988c72010-04-24 07:57:43 -04001899 ses->linux_uid = volume_info->linux_uid;
1900 ses->overrideSecFlg = volume_info->secFlg;
1901
1902 mutex_lock(&ses->session_mutex);
Jeff Layton198b5682010-04-24 07:57:48 -04001903 rc = cifs_negotiate_protocol(xid, ses);
1904 if (!rc)
1905 rc = cifs_setup_session(xid, ses, volume_info->local_nls);
Jeff Layton36988c72010-04-24 07:57:43 -04001906 mutex_unlock(&ses->session_mutex);
Steve Frenchc8e56f12010-09-08 21:10:58 +00001907 if (rc)
Jeff Layton36988c72010-04-24 07:57:43 -04001908 goto get_ses_fail;
1909
1910 /* success, put it on the list */
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05301911 spin_lock(&cifs_tcp_ses_lock);
Jeff Layton36988c72010-04-24 07:57:43 -04001912 list_add(&ses->smb_ses_list, &server->smb_ses_list);
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05301913 spin_unlock(&cifs_tcp_ses_lock);
Jeff Layton36988c72010-04-24 07:57:43 -04001914
1915 FreeXid(xid);
1916 return ses;
1917
1918get_ses_fail:
1919 sesInfoFree(ses);
1920 FreeXid(xid);
1921 return ERR_PTR(rc);
1922}
1923
Linus Torvalds1da177e2005-04-16 15:20:36 -07001924static struct cifsTconInfo *
Jeff Laytonf1987b42008-11-15 11:12:47 -05001925cifs_find_tcon(struct cifsSesInfo *ses, const char *unc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001926{
1927 struct list_head *tmp;
1928 struct cifsTconInfo *tcon;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001929
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05301930 spin_lock(&cifs_tcp_ses_lock);
Jeff Laytonf1987b42008-11-15 11:12:47 -05001931 list_for_each(tmp, &ses->tcon_list) {
1932 tcon = list_entry(tmp, struct cifsTconInfo, tcon_list);
1933 if (tcon->tidStatus == CifsExiting)
1934 continue;
1935 if (strncmp(tcon->treeName, unc, MAX_TREE_SIZE))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001936 continue;
1937
Jeff Laytonf1987b42008-11-15 11:12:47 -05001938 ++tcon->tc_count;
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05301939 spin_unlock(&cifs_tcp_ses_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001940 return tcon;
1941 }
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05301942 spin_unlock(&cifs_tcp_ses_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001943 return NULL;
1944}
1945
Jeff Laytonf1987b42008-11-15 11:12:47 -05001946static void
1947cifs_put_tcon(struct cifsTconInfo *tcon)
1948{
1949 int xid;
1950 struct cifsSesInfo *ses = tcon->ses;
1951
Jeff Laytond00c28d2010-04-24 07:57:44 -04001952 cFYI(1, "%s: tc_count=%d\n", __func__, tcon->tc_count);
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05301953 spin_lock(&cifs_tcp_ses_lock);
Jeff Laytonf1987b42008-11-15 11:12:47 -05001954 if (--tcon->tc_count > 0) {
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05301955 spin_unlock(&cifs_tcp_ses_lock);
Jeff Laytonf1987b42008-11-15 11:12:47 -05001956 return;
1957 }
1958
1959 list_del_init(&tcon->tcon_list);
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05301960 spin_unlock(&cifs_tcp_ses_lock);
Jeff Laytonf1987b42008-11-15 11:12:47 -05001961
1962 xid = GetXid();
1963 CIFSSMBTDis(xid, tcon);
1964 _FreeXid(xid);
1965
Suresh Jayaramand03382c2010-07-05 18:12:27 +05301966 cifs_fscache_release_super_cookie(tcon);
Steve French9f841592010-07-23 20:37:53 +00001967 tconInfoFree(tcon);
Jeff Laytonf1987b42008-11-15 11:12:47 -05001968 cifs_put_smb_ses(ses);
1969}
1970
Jeff Laytond00c28d2010-04-24 07:57:44 -04001971static struct cifsTconInfo *
1972cifs_get_tcon(struct cifsSesInfo *ses, struct smb_vol *volume_info)
1973{
1974 int rc, xid;
1975 struct cifsTconInfo *tcon;
1976
1977 tcon = cifs_find_tcon(ses, volume_info->UNC);
1978 if (tcon) {
1979 cFYI(1, "Found match on UNC path");
1980 /* existing tcon already has a reference */
1981 cifs_put_smb_ses(ses);
1982 if (tcon->seal != volume_info->seal)
1983 cERROR(1, "transport encryption setting "
1984 "conflicts with existing tid");
1985 return tcon;
1986 }
1987
1988 tcon = tconInfoAlloc();
1989 if (tcon == NULL) {
1990 rc = -ENOMEM;
1991 goto out_fail;
1992 }
1993
1994 tcon->ses = ses;
1995 if (volume_info->password) {
1996 tcon->password = kstrdup(volume_info->password, GFP_KERNEL);
1997 if (!tcon->password) {
1998 rc = -ENOMEM;
1999 goto out_fail;
2000 }
2001 }
2002
2003 if (strchr(volume_info->UNC + 3, '\\') == NULL
2004 && strchr(volume_info->UNC + 3, '/') == NULL) {
2005 cERROR(1, "Missing share name");
2006 rc = -ENODEV;
2007 goto out_fail;
2008 }
2009
2010 /* BB Do we need to wrap session_mutex around
2011 * this TCon call and Unix SetFS as
2012 * we do on SessSetup and reconnect? */
2013 xid = GetXid();
2014 rc = CIFSTCon(xid, ses, volume_info->UNC, tcon, volume_info->local_nls);
2015 FreeXid(xid);
2016 cFYI(1, "CIFS Tcon rc = %d", rc);
2017 if (rc)
2018 goto out_fail;
2019
2020 if (volume_info->nodfs) {
2021 tcon->Flags &= ~SMB_SHARE_IS_IN_DFS;
2022 cFYI(1, "DFS disabled (%d)", tcon->Flags);
2023 }
2024 tcon->seal = volume_info->seal;
2025 /* we can have only one retry value for a connection
2026 to a share so for resources mounted more than once
2027 to the same server share the last value passed in
2028 for the retry flag is used */
2029 tcon->retry = volume_info->retry;
2030 tcon->nocase = volume_info->nocase;
2031 tcon->local_lease = volume_info->local_lease;
2032
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302033 spin_lock(&cifs_tcp_ses_lock);
Jeff Laytond00c28d2010-04-24 07:57:44 -04002034 list_add(&tcon->tcon_list, &ses->tcon_list);
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302035 spin_unlock(&cifs_tcp_ses_lock);
Jeff Laytond00c28d2010-04-24 07:57:44 -04002036
Suresh Jayaramand03382c2010-07-05 18:12:27 +05302037 cifs_fscache_get_super_cookie(tcon);
2038
Jeff Laytond00c28d2010-04-24 07:57:44 -04002039 return tcon;
2040
2041out_fail:
2042 tconInfoFree(tcon);
2043 return ERR_PTR(rc);
2044}
2045
Jeff Layton9d002df2010-10-06 19:51:11 -04002046void
2047cifs_put_tlink(struct tcon_link *tlink)
2048{
2049 if (!tlink || IS_ERR(tlink))
2050 return;
2051
2052 if (!atomic_dec_and_test(&tlink->tl_count) ||
2053 test_bit(TCON_LINK_IN_TREE, &tlink->tl_flags)) {
2054 tlink->tl_time = jiffies;
2055 return;
2056 }
2057
2058 if (!IS_ERR(tlink_tcon(tlink)))
2059 cifs_put_tcon(tlink_tcon(tlink));
2060 kfree(tlink);
2061 return;
2062}
Jeff Laytond00c28d2010-04-24 07:57:44 -04002063
Linus Torvalds1da177e2005-04-16 15:20:36 -07002064int
Steve French50c2f752007-07-13 00:33:32 +00002065get_dfs_path(int xid, struct cifsSesInfo *pSesInfo, const char *old_path,
2066 const struct nls_table *nls_codepage, unsigned int *pnum_referrals,
Steve French366781c2008-01-25 10:12:41 +00002067 struct dfs_info3_param **preferrals, int remap)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002068{
2069 char *temp_unc;
2070 int rc = 0;
2071
2072 *pnum_referrals = 0;
Steve French366781c2008-01-25 10:12:41 +00002073 *preferrals = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002074
2075 if (pSesInfo->ipc_tid == 0) {
2076 temp_unc = kmalloc(2 /* for slashes */ +
Steve French50c2f752007-07-13 00:33:32 +00002077 strnlen(pSesInfo->serverName,
2078 SERVER_NAME_LEN_WITH_NULL * 2)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002079 + 1 + 4 /* slash IPC$ */ + 2,
2080 GFP_KERNEL);
2081 if (temp_unc == NULL)
2082 return -ENOMEM;
2083 temp_unc[0] = '\\';
2084 temp_unc[1] = '\\';
2085 strcpy(temp_unc + 2, pSesInfo->serverName);
2086 strcpy(temp_unc + 2 + strlen(pSesInfo->serverName), "\\IPC$");
2087 rc = CIFSTCon(xid, pSesInfo, temp_unc, NULL, nls_codepage);
Joe Perchesb6b38f72010-04-21 03:50:45 +00002088 cFYI(1, "CIFS Tcon rc = %d ipc_tid = %d", rc, pSesInfo->ipc_tid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002089 kfree(temp_unc);
2090 }
2091 if (rc == 0)
Steve Frenchc2cf07d2008-05-15 06:20:02 +00002092 rc = CIFSGetDFSRefer(xid, pSesInfo, old_path, preferrals,
Steve French737b7582005-04-28 22:41:06 -07002093 pnum_referrals, nls_codepage, remap);
Steve French366781c2008-01-25 10:12:41 +00002094 /* BB map targetUNCs to dfs_info3 structures, here or
2095 in CIFSGetDFSRefer BB */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002096
2097 return rc;
2098}
2099
Jeff Layton09e50d52008-07-23 10:11:19 -04002100#ifdef CONFIG_DEBUG_LOCK_ALLOC
2101static struct lock_class_key cifs_key[2];
2102static struct lock_class_key cifs_slock_key[2];
2103
2104static inline void
2105cifs_reclassify_socket4(struct socket *sock)
2106{
2107 struct sock *sk = sock->sk;
2108 BUG_ON(sock_owned_by_user(sk));
2109 sock_lock_init_class_and_name(sk, "slock-AF_INET-CIFS",
2110 &cifs_slock_key[0], "sk_lock-AF_INET-CIFS", &cifs_key[0]);
2111}
2112
2113static inline void
2114cifs_reclassify_socket6(struct socket *sock)
2115{
2116 struct sock *sk = sock->sk;
2117 BUG_ON(sock_owned_by_user(sk));
2118 sock_lock_init_class_and_name(sk, "slock-AF_INET6-CIFS",
2119 &cifs_slock_key[1], "sk_lock-AF_INET6-CIFS", &cifs_key[1]);
2120}
2121#else
2122static inline void
2123cifs_reclassify_socket4(struct socket *sock)
2124{
2125}
2126
2127static inline void
2128cifs_reclassify_socket6(struct socket *sock)
2129{
2130}
2131#endif
2132
Linus Torvalds1da177e2005-04-16 15:20:36 -07002133/* See RFC1001 section 14 on representation of Netbios names */
Steve French50c2f752007-07-13 00:33:32 +00002134static void rfc1002mangle(char *target, char *source, unsigned int length)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002135{
Steve French50c2f752007-07-13 00:33:32 +00002136 unsigned int i, j;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002137
Steve French50c2f752007-07-13 00:33:32 +00002138 for (i = 0, j = 0; i < (length); i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002139 /* mask a nibble at a time and encode */
2140 target[j] = 'A' + (0x0F & (source[i] >> 4));
2141 target[j+1] = 'A' + (0x0F & source[i]);
Steve French50c2f752007-07-13 00:33:32 +00002142 j += 2;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002143 }
2144
2145}
2146
Ben Greear3eb9a882010-09-01 17:06:02 -07002147static int
2148bind_socket(struct TCP_Server_Info *server)
2149{
2150 int rc = 0;
2151 if (server->srcaddr.ss_family != AF_UNSPEC) {
2152 /* Bind to the specified local IP address */
2153 struct socket *socket = server->ssocket;
2154 rc = socket->ops->bind(socket,
2155 (struct sockaddr *) &server->srcaddr,
2156 sizeof(server->srcaddr));
2157 if (rc < 0) {
2158 struct sockaddr_in *saddr4;
2159 struct sockaddr_in6 *saddr6;
2160 saddr4 = (struct sockaddr_in *)&server->srcaddr;
2161 saddr6 = (struct sockaddr_in6 *)&server->srcaddr;
2162 if (saddr6->sin6_family == AF_INET6)
2163 cERROR(1, "cifs: "
2164 "Failed to bind to: %pI6c, error: %d\n",
2165 &saddr6->sin6_addr, rc);
2166 else
2167 cERROR(1, "cifs: "
2168 "Failed to bind to: %pI4, error: %d\n",
2169 &saddr4->sin_addr.s_addr, rc);
2170 }
2171 }
2172 return rc;
2173}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002174
2175static int
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002176ip_rfc1001_connect(struct TCP_Server_Info *server)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002177{
2178 int rc = 0;
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002179 /*
2180 * some servers require RFC1001 sessinit before sending
2181 * negprot - BB check reconnection in case where second
2182 * sessinit is sent but no second negprot
2183 */
2184 struct rfc1002_session_packet *ses_init_buf;
2185 struct smb_hdr *smb_buf;
2186 ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet),
2187 GFP_KERNEL);
2188 if (ses_init_buf) {
2189 ses_init_buf->trailer.session_req.called_len = 32;
2190
2191 if (server->server_RFC1001_name &&
2192 server->server_RFC1001_name[0] != 0)
2193 rfc1002mangle(ses_init_buf->trailer.
2194 session_req.called_name,
2195 server->server_RFC1001_name,
2196 RFC1001_NAME_LEN_WITH_NULL);
2197 else
2198 rfc1002mangle(ses_init_buf->trailer.
2199 session_req.called_name,
2200 DEFAULT_CIFS_CALLED_NAME,
2201 RFC1001_NAME_LEN_WITH_NULL);
2202
2203 ses_init_buf->trailer.session_req.calling_len = 32;
2204
2205 /*
2206 * calling name ends in null (byte 16) from old smb
2207 * convention.
2208 */
2209 if (server->workstation_RFC1001_name &&
2210 server->workstation_RFC1001_name[0] != 0)
2211 rfc1002mangle(ses_init_buf->trailer.
2212 session_req.calling_name,
2213 server->workstation_RFC1001_name,
2214 RFC1001_NAME_LEN_WITH_NULL);
2215 else
2216 rfc1002mangle(ses_init_buf->trailer.
2217 session_req.calling_name,
2218 "LINUX_CIFS_CLNT",
2219 RFC1001_NAME_LEN_WITH_NULL);
2220
2221 ses_init_buf->trailer.session_req.scope1 = 0;
2222 ses_init_buf->trailer.session_req.scope2 = 0;
2223 smb_buf = (struct smb_hdr *)ses_init_buf;
2224
2225 /* sizeof RFC1002_SESSION_REQUEST with no scope */
2226 smb_buf->smb_buf_length = 0x81000044;
2227 rc = smb_send(server, smb_buf, 0x44);
2228 kfree(ses_init_buf);
2229 /*
2230 * RFC1001 layer in at least one server
2231 * requires very short break before negprot
2232 * presumably because not expecting negprot
2233 * to follow so fast. This is a simple
2234 * solution that works without
2235 * complicating the code and causes no
2236 * significant slowing down on mount
2237 * for everyone else
2238 */
2239 usleep_range(1000, 2000);
2240 }
2241 /*
2242 * else the negprot may still work without this
2243 * even though malloc failed
2244 */
2245
2246 return rc;
2247}
2248
2249static int
2250generic_ip_connect(struct TCP_Server_Info *server)
2251{
2252 int rc = 0;
2253 unsigned short int sport;
2254 int slen, sfamily;
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002255 struct socket *socket = server->ssocket;
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002256 struct sockaddr *saddr;
2257
2258 saddr = (struct sockaddr *) &server->dstaddr;
2259
2260 if (server->dstaddr.ss_family == AF_INET6) {
2261 sport = ((struct sockaddr_in6 *) saddr)->sin6_port;
2262 slen = sizeof(struct sockaddr_in6);
2263 sfamily = AF_INET6;
2264 } else {
2265 sport = ((struct sockaddr_in *) saddr)->sin_port;
2266 slen = sizeof(struct sockaddr_in);
2267 sfamily = AF_INET;
2268 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002269
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002270 if (socket == NULL) {
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002271 rc = sock_create_kern(sfamily, SOCK_STREAM,
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002272 IPPROTO_TCP, &socket);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002273 if (rc < 0) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00002274 cERROR(1, "Error %d creating socket", rc);
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002275 server->ssocket = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002276 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002277 }
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002278
2279 /* BB other socket options to set KEEPALIVE, NODELAY? */
Joe Perchesb6b38f72010-04-21 03:50:45 +00002280 cFYI(1, "Socket created");
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002281 server->ssocket = socket;
2282 socket->sk->sk_allocation = GFP_NOFS;
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002283 if (sfamily == AF_INET6)
2284 cifs_reclassify_socket6(socket);
2285 else
2286 cifs_reclassify_socket4(socket);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002287 }
2288
Ben Greear3eb9a882010-09-01 17:06:02 -07002289 rc = bind_socket(server);
2290 if (rc < 0)
2291 return rc;
2292
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002293 rc = socket->ops->connect(socket, saddr, slen, 0);
2294 if (rc < 0) {
2295 cFYI(1, "Error %d connecting to server", rc);
Jeff Laytond5c56052008-12-01 18:42:33 -05002296 sock_release(socket);
2297 server->ssocket = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002298 return rc;
2299 }
Steve Frenchedf1ae42008-10-29 00:47:57 +00002300
Jeff Laytond5c56052008-12-01 18:42:33 -05002301 /*
2302 * Eventually check for other socket options to change from
2303 * the default. sock_setsockopt not used because it expects
2304 * user space buffer
2305 */
2306 socket->sk->sk_rcvtimeo = 7 * HZ;
Steve Frenchda505c32009-01-19 03:49:35 +00002307 socket->sk->sk_sndtimeo = 5 * HZ;
Steve French6a5fa2362010-01-01 01:28:43 +00002308
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002309 /* make the bufsizes depend on wsize/rsize and max requests */
2310 if (server->noautotune) {
2311 if (socket->sk->sk_sndbuf < (200 * 1024))
2312 socket->sk->sk_sndbuf = 200 * 1024;
2313 if (socket->sk->sk_rcvbuf < (140 * 1024))
2314 socket->sk->sk_rcvbuf = 140 * 1024;
2315 }
2316
Steve French6a5fa2362010-01-01 01:28:43 +00002317 if (server->tcp_nodelay) {
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002318 int val = 1;
Steve French6a5fa2362010-01-01 01:28:43 +00002319 rc = kernel_setsockopt(socket, SOL_TCP, TCP_NODELAY,
2320 (char *)&val, sizeof(val));
2321 if (rc)
Joe Perchesb6b38f72010-04-21 03:50:45 +00002322 cFYI(1, "set TCP_NODELAY socket option error %d", rc);
Steve French6a5fa2362010-01-01 01:28:43 +00002323 }
2324
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002325 cFYI(1, "sndbuf %d rcvbuf %d rcvtimeo 0x%lx",
2326 socket->sk->sk_sndbuf,
2327 socket->sk->sk_rcvbuf, socket->sk->sk_rcvtimeo);
2328
2329 if (sport == htons(RFC1001_PORT))
2330 rc = ip_rfc1001_connect(server);
Steve French50c2f752007-07-13 00:33:32 +00002331
Linus Torvalds1da177e2005-04-16 15:20:36 -07002332 return rc;
2333}
2334
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002335static int
2336ip_connect(struct TCP_Server_Info *server)
2337{
2338 unsigned short int *sport;
2339 struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr;
2340 struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr;
2341
2342 if (server->dstaddr.ss_family == AF_INET6)
2343 sport = &addr6->sin6_port;
2344 else
2345 sport = &addr->sin_port;
2346
2347 if (*sport == 0) {
2348 int rc;
2349
2350 /* try with 445 port at first */
2351 *sport = htons(CIFS_PORT);
2352
2353 rc = generic_ip_connect(server);
2354 if (rc >= 0)
2355 return rc;
2356
2357 /* if it failed, try with 139 port */
2358 *sport = htons(RFC1001_PORT);
2359 }
2360
2361 return generic_ip_connect(server);
2362}
2363
Steve French50c2f752007-07-13 00:33:32 +00002364void reset_cifs_unix_caps(int xid, struct cifsTconInfo *tcon,
2365 struct super_block *sb, struct smb_vol *vol_info)
Steve French8af18972007-02-14 04:42:51 +00002366{
2367 /* if we are reconnecting then should we check to see if
2368 * any requested capabilities changed locally e.g. via
2369 * remount but we can not do much about it here
2370 * if they have (even if we could detect it by the following)
2371 * Perhaps we could add a backpointer to array of sb from tcon
2372 * or if we change to make all sb to same share the same
2373 * sb as NFS - then we only have one backpointer to sb.
2374 * What if we wanted to mount the server share twice once with
2375 * and once without posixacls or posix paths? */
2376 __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
Steve French50c2f752007-07-13 00:33:32 +00002377
Steve Frenchc18c8422007-07-18 23:21:09 +00002378 if (vol_info && vol_info->no_linux_ext) {
2379 tcon->fsUnixInfo.Capability = 0;
2380 tcon->unix_ext = 0; /* Unix Extensions disabled */
Joe Perchesb6b38f72010-04-21 03:50:45 +00002381 cFYI(1, "Linux protocol extensions disabled");
Steve Frenchc18c8422007-07-18 23:21:09 +00002382 return;
2383 } else if (vol_info)
2384 tcon->unix_ext = 1; /* Unix Extensions supported */
2385
2386 if (tcon->unix_ext == 0) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00002387 cFYI(1, "Unix extensions disabled so not set on reconnect");
Steve Frenchc18c8422007-07-18 23:21:09 +00002388 return;
2389 }
Steve French50c2f752007-07-13 00:33:32 +00002390
Steve Frenchfb8c4b12007-07-10 01:16:18 +00002391 if (!CIFSSMBQFSUnixInfo(xid, tcon)) {
Steve French8af18972007-02-14 04:42:51 +00002392 __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
Steve French50c2f752007-07-13 00:33:32 +00002393
Steve French8af18972007-02-14 04:42:51 +00002394 /* check for reconnect case in which we do not
2395 want to change the mount behavior if we can avoid it */
Steve Frenchfb8c4b12007-07-10 01:16:18 +00002396 if (vol_info == NULL) {
Steve French50c2f752007-07-13 00:33:32 +00002397 /* turn off POSIX ACL and PATHNAMES if not set
Steve French8af18972007-02-14 04:42:51 +00002398 originally at mount time */
2399 if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0)
2400 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
Igor Mammedov11b6d642008-02-15 19:06:04 +00002401 if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
2402 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
Joe Perchesb6b38f72010-04-21 03:50:45 +00002403 cERROR(1, "POSIXPATH support change");
Steve French8af18972007-02-14 04:42:51 +00002404 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
Igor Mammedov11b6d642008-02-15 19:06:04 +00002405 } else if ((cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00002406 cERROR(1, "possible reconnect error");
2407 cERROR(1, "server disabled POSIX path support");
Igor Mammedov11b6d642008-02-15 19:06:04 +00002408 }
Steve French8af18972007-02-14 04:42:51 +00002409 }
Steve French50c2f752007-07-13 00:33:32 +00002410
Steve French8af18972007-02-14 04:42:51 +00002411 cap &= CIFS_UNIX_CAP_MASK;
Steve French75865f8c2007-06-24 18:30:48 +00002412 if (vol_info && vol_info->no_psx_acl)
Steve French8af18972007-02-14 04:42:51 +00002413 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
Steve French75865f8c2007-06-24 18:30:48 +00002414 else if (CIFS_UNIX_POSIX_ACL_CAP & cap) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00002415 cFYI(1, "negotiated posix acl support");
Steve Frenchfb8c4b12007-07-10 01:16:18 +00002416 if (sb)
Steve French8af18972007-02-14 04:42:51 +00002417 sb->s_flags |= MS_POSIXACL;
2418 }
2419
Steve French75865f8c2007-06-24 18:30:48 +00002420 if (vol_info && vol_info->posix_paths == 0)
Steve French8af18972007-02-14 04:42:51 +00002421 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
Steve French75865f8c2007-06-24 18:30:48 +00002422 else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00002423 cFYI(1, "negotiate posix pathnames");
Steve French75865f8c2007-06-24 18:30:48 +00002424 if (sb)
Steve French50c2f752007-07-13 00:33:32 +00002425 CIFS_SB(sb)->mnt_cifs_flags |=
Steve French8af18972007-02-14 04:42:51 +00002426 CIFS_MOUNT_POSIX_PATHS;
2427 }
Steve French50c2f752007-07-13 00:33:32 +00002428
Steve French984acfe2007-04-26 16:42:50 +00002429 /* We might be setting the path sep back to a different
2430 form if we are reconnecting and the server switched its
Steve French50c2f752007-07-13 00:33:32 +00002431 posix path capability for this share */
Steve French75865f8c2007-06-24 18:30:48 +00002432 if (sb && (CIFS_SB(sb)->prepathlen > 0))
Steve French984acfe2007-04-26 16:42:50 +00002433 CIFS_SB(sb)->prepath[0] = CIFS_DIR_SEP(CIFS_SB(sb));
Steve French75865f8c2007-06-24 18:30:48 +00002434
2435 if (sb && (CIFS_SB(sb)->rsize > 127 * 1024)) {
2436 if ((cap & CIFS_UNIX_LARGE_READ_CAP) == 0) {
2437 CIFS_SB(sb)->rsize = 127 * 1024;
Joe Perchesb6b38f72010-04-21 03:50:45 +00002438 cFYI(DBG2, "larger reads not supported by srv");
Steve French75865f8c2007-06-24 18:30:48 +00002439 }
2440 }
Steve French50c2f752007-07-13 00:33:32 +00002441
2442
Joe Perchesb6b38f72010-04-21 03:50:45 +00002443 cFYI(1, "Negotiate caps 0x%x", (int)cap);
Steve French8af18972007-02-14 04:42:51 +00002444#ifdef CONFIG_CIFS_DEBUG2
Steve French75865f8c2007-06-24 18:30:48 +00002445 if (cap & CIFS_UNIX_FCNTL_CAP)
Joe Perchesb6b38f72010-04-21 03:50:45 +00002446 cFYI(1, "FCNTL cap");
Steve French75865f8c2007-06-24 18:30:48 +00002447 if (cap & CIFS_UNIX_EXTATTR_CAP)
Joe Perchesb6b38f72010-04-21 03:50:45 +00002448 cFYI(1, "EXTATTR cap");
Steve French75865f8c2007-06-24 18:30:48 +00002449 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
Joe Perchesb6b38f72010-04-21 03:50:45 +00002450 cFYI(1, "POSIX path cap");
Steve French75865f8c2007-06-24 18:30:48 +00002451 if (cap & CIFS_UNIX_XATTR_CAP)
Joe Perchesb6b38f72010-04-21 03:50:45 +00002452 cFYI(1, "XATTR cap");
Steve French75865f8c2007-06-24 18:30:48 +00002453 if (cap & CIFS_UNIX_POSIX_ACL_CAP)
Joe Perchesb6b38f72010-04-21 03:50:45 +00002454 cFYI(1, "POSIX ACL cap");
Steve French75865f8c2007-06-24 18:30:48 +00002455 if (cap & CIFS_UNIX_LARGE_READ_CAP)
Joe Perchesb6b38f72010-04-21 03:50:45 +00002456 cFYI(1, "very large read cap");
Steve French75865f8c2007-06-24 18:30:48 +00002457 if (cap & CIFS_UNIX_LARGE_WRITE_CAP)
Joe Perchesb6b38f72010-04-21 03:50:45 +00002458 cFYI(1, "very large write cap");
Steve French8af18972007-02-14 04:42:51 +00002459#endif /* CIFS_DEBUG2 */
2460 if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) {
Steve French442aa312007-09-24 20:25:46 +00002461 if (vol_info == NULL) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00002462 cFYI(1, "resetting capabilities failed");
Steve French442aa312007-09-24 20:25:46 +00002463 } else
Joe Perchesb6b38f72010-04-21 03:50:45 +00002464 cERROR(1, "Negotiating Unix capabilities "
Steve French5a44b312007-09-20 15:16:24 +00002465 "with the server failed. Consider "
2466 "mounting with the Unix Extensions\n"
2467 "disabled, if problems are found, "
2468 "by specifying the nounix mount "
Joe Perchesb6b38f72010-04-21 03:50:45 +00002469 "option.");
Steve French5a44b312007-09-20 15:16:24 +00002470
Steve French8af18972007-02-14 04:42:51 +00002471 }
2472 }
2473}
2474
Steve French03a143c2008-02-14 06:38:30 +00002475static void
2476convert_delimiter(char *path, char delim)
2477{
2478 int i;
Steve Frenchc2d68ea2008-02-15 19:20:18 +00002479 char old_delim;
Steve French03a143c2008-02-14 06:38:30 +00002480
2481 if (path == NULL)
2482 return;
2483
Steve French582d21e2008-05-13 04:54:12 +00002484 if (delim == '/')
Steve Frenchc2d68ea2008-02-15 19:20:18 +00002485 old_delim = '\\';
2486 else
2487 old_delim = '/';
2488
Steve French03a143c2008-02-14 06:38:30 +00002489 for (i = 0; path[i] != '\0'; i++) {
Steve Frenchc2d68ea2008-02-15 19:20:18 +00002490 if (path[i] == old_delim)
Steve French03a143c2008-02-14 06:38:30 +00002491 path[i] = delim;
2492 }
2493}
2494
Steve French3b795212008-11-13 19:45:32 +00002495static void setup_cifs_sb(struct smb_vol *pvolume_info,
2496 struct cifs_sb_info *cifs_sb)
Jeff Laytonb1c8d2b2008-10-22 13:57:07 -04002497{
Jeff Layton2de970f2010-10-06 19:51:12 -04002498 INIT_DELAYED_WORK(&cifs_sb->prune_tlinks, cifs_prune_tlinks);
2499
Steve French3b795212008-11-13 19:45:32 +00002500 if (pvolume_info->rsize > CIFSMaxBufSize) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00002501 cERROR(1, "rsize %d too large, using MaxBufSize",
2502 pvolume_info->rsize);
Steve French3b795212008-11-13 19:45:32 +00002503 cifs_sb->rsize = CIFSMaxBufSize;
2504 } else if ((pvolume_info->rsize) &&
2505 (pvolume_info->rsize <= CIFSMaxBufSize))
2506 cifs_sb->rsize = pvolume_info->rsize;
2507 else /* default */
2508 cifs_sb->rsize = CIFSMaxBufSize;
Jeff Laytonb1c8d2b2008-10-22 13:57:07 -04002509
Steve French3b795212008-11-13 19:45:32 +00002510 if (pvolume_info->wsize > PAGEVEC_SIZE * PAGE_CACHE_SIZE) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00002511 cERROR(1, "wsize %d too large, using 4096 instead",
2512 pvolume_info->wsize);
Steve French3b795212008-11-13 19:45:32 +00002513 cifs_sb->wsize = 4096;
2514 } else if (pvolume_info->wsize)
2515 cifs_sb->wsize = pvolume_info->wsize;
2516 else
2517 cifs_sb->wsize = min_t(const int,
2518 PAGEVEC_SIZE * PAGE_CACHE_SIZE,
2519 127*1024);
2520 /* old default of CIFSMaxBufSize was too small now
2521 that SMB Write2 can send multiple pages in kvec.
2522 RFC1001 does not describe what happens when frame
2523 bigger than 128K is sent so use that as max in
2524 conjunction with 52K kvec constraint on arch with 4K
2525 page size */
2526
2527 if (cifs_sb->rsize < 2048) {
2528 cifs_sb->rsize = 2048;
2529 /* Windows ME may prefer this */
Joe Perchesb6b38f72010-04-21 03:50:45 +00002530 cFYI(1, "readsize set to minimum: 2048");
Steve French3b795212008-11-13 19:45:32 +00002531 }
2532 /* calculate prepath */
2533 cifs_sb->prepath = pvolume_info->prepath;
2534 if (cifs_sb->prepath) {
2535 cifs_sb->prepathlen = strlen(cifs_sb->prepath);
2536 /* we can not convert the / to \ in the path
2537 separators in the prefixpath yet because we do not
2538 know (until reset_cifs_unix_caps is called later)
2539 whether POSIX PATH CAP is available. We normalize
2540 the / to \ after reset_cifs_unix_caps is called */
2541 pvolume_info->prepath = NULL;
2542 } else
2543 cifs_sb->prepathlen = 0;
2544 cifs_sb->mnt_uid = pvolume_info->linux_uid;
2545 cifs_sb->mnt_gid = pvolume_info->linux_gid;
2546 cifs_sb->mnt_file_mode = pvolume_info->file_mode;
2547 cifs_sb->mnt_dir_mode = pvolume_info->dir_mode;
Joe Perchesb6b38f72010-04-21 03:50:45 +00002548 cFYI(1, "file mode: 0x%x dir mode: 0x%x",
2549 cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode);
Steve French3b795212008-11-13 19:45:32 +00002550
Suresh Jayaraman6d20e842010-12-01 14:42:28 +05302551 cifs_sb->actimeo = pvolume_info->actimeo;
2552
Steve French3b795212008-11-13 19:45:32 +00002553 if (pvolume_info->noperm)
2554 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM;
2555 if (pvolume_info->setuids)
2556 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID;
2557 if (pvolume_info->server_ino)
2558 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM;
2559 if (pvolume_info->remap)
2560 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR;
2561 if (pvolume_info->no_xattr)
2562 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR;
2563 if (pvolume_info->sfu_emul)
2564 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL;
2565 if (pvolume_info->nobrl)
2566 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL;
Steve Frenchbe652442009-02-23 15:21:59 +00002567 if (pvolume_info->nostrictsync)
Steve French4717bed2009-02-24 14:44:19 +00002568 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOSSYNC;
Steve French13a6e422008-12-02 17:24:33 +00002569 if (pvolume_info->mand_lock)
2570 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL;
Steve French3b795212008-11-13 19:45:32 +00002571 if (pvolume_info->cifs_acl)
2572 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL;
2573 if (pvolume_info->override_uid)
2574 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID;
2575 if (pvolume_info->override_gid)
2576 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID;
2577 if (pvolume_info->dynperm)
2578 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM;
Suresh Jayaramanfa1df752010-07-05 18:13:36 +05302579 if (pvolume_info->fsc)
2580 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_FSCACHE;
Jeff Layton0eb8a132010-10-06 19:51:12 -04002581 if (pvolume_info->multiuser)
2582 cifs_sb->mnt_cifs_flags |= (CIFS_MOUNT_MULTIUSER |
2583 CIFS_MOUNT_NO_PERM);
Steve French3b795212008-11-13 19:45:32 +00002584 if (pvolume_info->direct_io) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00002585 cFYI(1, "mounting share using direct i/o");
Steve French3b795212008-11-13 19:45:32 +00002586 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO;
2587 }
Stefan Metzmacher736a3322010-07-30 14:56:00 +02002588 if (pvolume_info->mfsymlinks) {
2589 if (pvolume_info->sfu_emul) {
2590 cERROR(1, "mount option mfsymlinks ignored if sfu "
2591 "mount option is used");
2592 } else {
2593 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MF_SYMLINKS;
2594 }
2595 }
Steve French3b795212008-11-13 19:45:32 +00002596
2597 if ((pvolume_info->cifs_acl) && (pvolume_info->dynperm))
Joe Perchesb6b38f72010-04-21 03:50:45 +00002598 cERROR(1, "mount option dynperm ignored if cifsacl "
2599 "mount option supported");
Jeff Laytonb1c8d2b2008-10-22 13:57:07 -04002600}
2601
Igor Mammedove4cce942009-02-10 14:10:26 +03002602static int
2603is_path_accessible(int xid, struct cifsTconInfo *tcon,
2604 struct cifs_sb_info *cifs_sb, const char *full_path)
2605{
2606 int rc;
Igor Mammedove4cce942009-02-10 14:10:26 +03002607 FILE_ALL_INFO *pfile_info;
2608
Igor Mammedove4cce942009-02-10 14:10:26 +03002609 pfile_info = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
2610 if (pfile_info == NULL)
2611 return -ENOMEM;
2612
2613 rc = CIFSSMBQPathInfo(xid, tcon, full_path, pfile_info,
2614 0 /* not legacy */, cifs_sb->local_nls,
2615 cifs_sb->mnt_cifs_flags &
2616 CIFS_MOUNT_MAP_SPECIAL_CHR);
2617 kfree(pfile_info);
2618 return rc;
2619}
2620
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002621static void
2622cleanup_volume_info(struct smb_vol **pvolume_info)
2623{
2624 struct smb_vol *volume_info;
2625
Dan Carpenterad6cca62010-04-26 12:10:06 +02002626 if (!pvolume_info || !*pvolume_info)
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002627 return;
2628
2629 volume_info = *pvolume_info;
2630 kzfree(volume_info->password);
2631 kfree(volume_info->UNC);
2632 kfree(volume_info->prepath);
2633 kfree(volume_info);
2634 *pvolume_info = NULL;
2635 return;
2636}
2637
Steve French2d6d5892009-04-09 00:36:44 +00002638#ifdef CONFIG_CIFS_DFS_UPCALL
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002639/* build_path_to_root returns full path to root when
2640 * we do not have an exiting connection (tcon) */
2641static char *
2642build_unc_path_to_root(const struct smb_vol *volume_info,
2643 const struct cifs_sb_info *cifs_sb)
2644{
2645 char *full_path;
2646
2647 int unc_len = strnlen(volume_info->UNC, MAX_TREE_SIZE + 1);
2648 full_path = kmalloc(unc_len + cifs_sb->prepathlen + 1, GFP_KERNEL);
2649 if (full_path == NULL)
2650 return ERR_PTR(-ENOMEM);
2651
2652 strncpy(full_path, volume_info->UNC, unc_len);
2653 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) {
2654 int i;
2655 for (i = 0; i < unc_len; i++) {
2656 if (full_path[i] == '\\')
2657 full_path[i] = '/';
2658 }
2659 }
2660
2661 if (cifs_sb->prepathlen)
2662 strncpy(full_path + unc_len, cifs_sb->prepath,
2663 cifs_sb->prepathlen);
2664
2665 full_path[unc_len + cifs_sb->prepathlen] = 0; /* add trailing null */
2666 return full_path;
2667}
Steve French2d6d5892009-04-09 00:36:44 +00002668#endif
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002669
Linus Torvalds1da177e2005-04-16 15:20:36 -07002670int
2671cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002672 char *mount_data_global, const char *devname)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002673{
Jeff Laytona2934c72009-12-03 08:09:41 -05002674 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002675 int xid;
Jeff Layton7586b762008-12-01 18:41:49 -05002676 struct smb_vol *volume_info;
Jeff Laytona2934c72009-12-03 08:09:41 -05002677 struct cifsSesInfo *pSesInfo;
2678 struct cifsTconInfo *tcon;
2679 struct TCP_Server_Info *srvTcp;
Igor Mammedove4cce942009-02-10 14:10:26 +03002680 char *full_path;
Steve French2d6d5892009-04-09 00:36:44 +00002681 char *mount_data = mount_data_global;
Jeff Layton9d002df2010-10-06 19:51:11 -04002682 struct tcon_link *tlink;
Steve French2d6d5892009-04-09 00:36:44 +00002683#ifdef CONFIG_CIFS_DFS_UPCALL
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002684 struct dfs_info3_param *referrals = NULL;
2685 unsigned int num_referrals = 0;
Igor Mammedov5c2503a2009-04-21 19:31:05 +04002686 int referral_walks_count = 0;
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002687try_mount_again:
Steve French2d6d5892009-04-09 00:36:44 +00002688#endif
Jeff Laytona2934c72009-12-03 08:09:41 -05002689 rc = 0;
2690 tcon = NULL;
2691 pSesInfo = NULL;
2692 srvTcp = NULL;
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002693 full_path = NULL;
Jeff Layton9d002df2010-10-06 19:51:11 -04002694 tlink = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002695
2696 xid = GetXid();
2697
Jeff Layton7586b762008-12-01 18:41:49 -05002698 volume_info = kzalloc(sizeof(struct smb_vol), GFP_KERNEL);
2699 if (!volume_info) {
2700 rc = -ENOMEM;
2701 goto out;
2702 }
Steve French50c2f752007-07-13 00:33:32 +00002703
Jeff Layton7586b762008-12-01 18:41:49 -05002704 if (cifs_parse_mount_options(mount_data, devname, volume_info)) {
Jeff Layton70fe7dc2007-11-16 22:21:07 +00002705 rc = -EINVAL;
2706 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002707 }
2708
Jeff Layton7586b762008-12-01 18:41:49 -05002709 if (volume_info->nullauth) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00002710 cFYI(1, "null user");
Jeff Layton7586b762008-12-01 18:41:49 -05002711 volume_info->username = "";
2712 } else if (volume_info->username) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002713 /* BB fixme parse for domain name here */
Joe Perchesb6b38f72010-04-21 03:50:45 +00002714 cFYI(1, "Username: %s", volume_info->username);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002715 } else {
Steve Frenchbf820672005-12-01 22:32:42 -08002716 cifserror("No username specified");
Steve French50c2f752007-07-13 00:33:32 +00002717 /* In userspace mount helper we can get user name from alternate
2718 locations such as env variables and files on disk */
Jeff Layton70fe7dc2007-11-16 22:21:07 +00002719 rc = -EINVAL;
2720 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002721 }
2722
Linus Torvalds1da177e2005-04-16 15:20:36 -07002723 /* this is needed for ASCII cp to Unicode converts */
Jeff Layton7586b762008-12-01 18:41:49 -05002724 if (volume_info->iocharset == NULL) {
Jeff Laytona5fc4ce2010-04-24 07:57:42 -04002725 /* load_nls_default cannot return null */
2726 volume_info->local_nls = load_nls_default();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002727 } else {
Jeff Laytona5fc4ce2010-04-24 07:57:42 -04002728 volume_info->local_nls = load_nls(volume_info->iocharset);
2729 if (volume_info->local_nls == NULL) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00002730 cERROR(1, "CIFS mount error: iocharset %s not found",
2731 volume_info->iocharset);
Jeff Layton70fe7dc2007-11-16 22:21:07 +00002732 rc = -ELIBACC;
2733 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002734 }
2735 }
Jeff Laytona5fc4ce2010-04-24 07:57:42 -04002736 cifs_sb->local_nls = volume_info->local_nls;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002737
Jeff Layton63c038c2008-12-01 18:41:46 -05002738 /* get a reference to a tcp session */
Jeff Layton7586b762008-12-01 18:41:49 -05002739 srvTcp = cifs_get_tcp_session(volume_info);
Jeff Layton63c038c2008-12-01 18:41:46 -05002740 if (IS_ERR(srvTcp)) {
2741 rc = PTR_ERR(srvTcp);
2742 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002743 }
2744
Jeff Layton36988c72010-04-24 07:57:43 -04002745 /* get a reference to a SMB session */
2746 pSesInfo = cifs_get_smb_ses(srvTcp, volume_info);
2747 if (IS_ERR(pSesInfo)) {
2748 rc = PTR_ERR(pSesInfo);
2749 pSesInfo = NULL;
2750 goto mount_fail_check;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002751 }
Steve French50c2f752007-07-13 00:33:32 +00002752
Jeff Laytond00c28d2010-04-24 07:57:44 -04002753 setup_cifs_sb(volume_info, cifs_sb);
2754 if (pSesInfo->capabilities & CAP_LARGE_FILES)
2755 sb->s_maxbytes = MAX_LFS_FILESIZE;
2756 else
2757 sb->s_maxbytes = MAX_NON_LFS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002758
Steve French8af18972007-02-14 04:42:51 +00002759 /* BB FIXME fix time_gran to be larger for LANMAN sessions */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002760 sb->s_time_gran = 100;
2761
Jeff Laytond00c28d2010-04-24 07:57:44 -04002762 /* search for existing tcon to this server share */
2763 tcon = cifs_get_tcon(pSesInfo, volume_info);
2764 if (IS_ERR(tcon)) {
2765 rc = PTR_ERR(tcon);
2766 tcon = NULL;
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002767 goto remote_path_check;
Jeff Laytond00c28d2010-04-24 07:57:44 -04002768 }
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002769
Steve Frenchd82c2df2008-11-15 00:07:26 +00002770 /* do not care if following two calls succeed - informational */
2771 if (!tcon->ipc) {
2772 CIFSSMBQFSDeviceInfo(xid, tcon);
2773 CIFSSMBQFSAttributeInfo(xid, tcon);
2774 }
2775
2776 /* tell server which Unix caps we support */
2777 if (tcon->ses->capabilities & CAP_UNIX)
2778 /* reset of caps checks mount to see if unix extensions
2779 disabled for just this mount */
Jeff Layton7586b762008-12-01 18:41:49 -05002780 reset_cifs_unix_caps(xid, tcon, sb, volume_info);
Steve Frenchd82c2df2008-11-15 00:07:26 +00002781 else
2782 tcon->unix_ext = 0; /* server does not support them */
2783
2784 /* convert forward to back slashes in prepath here if needed */
2785 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) == 0)
2786 convert_delimiter(cifs_sb->prepath, CIFS_DIR_SEP(cifs_sb));
2787
2788 if ((tcon->unix_ext == 0) && (cifs_sb->rsize > (1024 * 127))) {
2789 cifs_sb->rsize = 1024 * 127;
Joe Perchesb6b38f72010-04-21 03:50:45 +00002790 cFYI(DBG2, "no very large read support, rsize now 127K");
Steve Frenchd82c2df2008-11-15 00:07:26 +00002791 }
2792 if (!(tcon->ses->capabilities & CAP_LARGE_WRITE_X))
2793 cifs_sb->wsize = min(cifs_sb->wsize,
2794 (tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE));
2795 if (!(tcon->ses->capabilities & CAP_LARGE_READ_X))
2796 cifs_sb->rsize = min(cifs_sb->rsize,
2797 (tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002798
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002799remote_path_check:
2800 /* check if a whole path (including prepath) is not remote */
2801 if (!rc && cifs_sb->prepathlen && tcon) {
Igor Mammedove4cce942009-02-10 14:10:26 +03002802 /* build_path_to_root works only when we have a valid tcon */
Jeff Layton7d161b72010-12-07 02:10:35 -05002803 full_path = cifs_build_path_to_root(cifs_sb, tcon);
Igor Mammedove4cce942009-02-10 14:10:26 +03002804 if (full_path == NULL) {
2805 rc = -ENOMEM;
2806 goto mount_fail_check;
2807 }
2808 rc = is_path_accessible(xid, tcon, cifs_sb, full_path);
Jeff Layton03ceace2010-12-06 21:07:33 -05002809 if (rc != 0 && rc != -EREMOTE) {
Igor Mammedove4cce942009-02-10 14:10:26 +03002810 kfree(full_path);
2811 goto mount_fail_check;
2812 }
2813 kfree(full_path);
2814 }
2815
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002816 /* get referral if needed */
2817 if (rc == -EREMOTE) {
Steve Frenchd036f502009-04-03 03:12:08 +00002818#ifdef CONFIG_CIFS_DFS_UPCALL
Igor Mammedov5c2503a2009-04-21 19:31:05 +04002819 if (referral_walks_count > MAX_NESTED_LINKS) {
2820 /*
2821 * BB: when we implement proper loop detection,
2822 * we will remove this check. But now we need it
2823 * to prevent an indefinite loop if 'DFS tree' is
2824 * misconfigured (i.e. has loops).
2825 */
2826 rc = -ELOOP;
2827 goto mount_fail_check;
2828 }
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002829 /* convert forward to back slashes in prepath here if needed */
2830 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) == 0)
2831 convert_delimiter(cifs_sb->prepath,
2832 CIFS_DIR_SEP(cifs_sb));
2833 full_path = build_unc_path_to_root(volume_info, cifs_sb);
2834 if (IS_ERR(full_path)) {
2835 rc = PTR_ERR(full_path);
2836 goto mount_fail_check;
2837 }
2838
Joe Perchesb6b38f72010-04-21 03:50:45 +00002839 cFYI(1, "Getting referral for: %s", full_path);
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002840 rc = get_dfs_path(xid, pSesInfo , full_path + 1,
2841 cifs_sb->local_nls, &num_referrals, &referrals,
2842 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
2843 if (!rc && num_referrals > 0) {
2844 char *fake_devname = NULL;
2845
2846 if (mount_data != mount_data_global)
2847 kfree(mount_data);
Jeff Layton7b91e262009-07-23 15:22:30 -04002848
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002849 mount_data = cifs_compose_mount_options(
2850 cifs_sb->mountdata, full_path + 1,
2851 referrals, &fake_devname);
Jeff Layton7b91e262009-07-23 15:22:30 -04002852
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002853 free_dfs_info_array(referrals, num_referrals);
Jeff Layton7b91e262009-07-23 15:22:30 -04002854 kfree(fake_devname);
2855 kfree(full_path);
2856
2857 if (IS_ERR(mount_data)) {
2858 rc = PTR_ERR(mount_data);
2859 mount_data = NULL;
2860 goto mount_fail_check;
2861 }
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002862
2863 if (tcon)
2864 cifs_put_tcon(tcon);
2865 else if (pSesInfo)
2866 cifs_put_smb_ses(pSesInfo);
2867
2868 cleanup_volume_info(&volume_info);
Igor Mammedov5c2503a2009-04-21 19:31:05 +04002869 referral_walks_count++;
Jeff Laytona2934c72009-12-03 08:09:41 -05002870 FreeXid(xid);
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002871 goto try_mount_again;
2872 }
Steve Frenchd036f502009-04-03 03:12:08 +00002873#else /* No DFS support, return error on mount */
2874 rc = -EOPNOTSUPP;
2875#endif
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002876 }
2877
Jeff Layton9d002df2010-10-06 19:51:11 -04002878 if (rc)
2879 goto mount_fail_check;
2880
2881 /* now, hang the tcon off of the superblock */
2882 tlink = kzalloc(sizeof *tlink, GFP_KERNEL);
2883 if (tlink == NULL) {
2884 rc = -ENOMEM;
2885 goto mount_fail_check;
2886 }
2887
Jeff Laytonb647c352010-10-28 11:16:44 -04002888 tlink->tl_uid = pSesInfo->linux_uid;
Jeff Layton9d002df2010-10-06 19:51:11 -04002889 tlink->tl_tcon = tcon;
2890 tlink->tl_time = jiffies;
2891 set_bit(TCON_LINK_MASTER, &tlink->tl_flags);
2892 set_bit(TCON_LINK_IN_TREE, &tlink->tl_flags);
2893
Jeff Layton413e6612010-10-28 13:33:38 -04002894 cifs_sb->master_tlink = tlink;
Jeff Laytonb647c352010-10-28 11:16:44 -04002895 spin_lock(&cifs_sb->tlink_tree_lock);
2896 tlink_rb_insert(&cifs_sb->tlink_tree, tlink);
2897 spin_unlock(&cifs_sb->tlink_tree_lock);
Jeff Layton413e6612010-10-28 13:33:38 -04002898
Jeff Layton2de970f2010-10-06 19:51:12 -04002899 queue_delayed_work(system_nrt_wq, &cifs_sb->prune_tlinks,
2900 TLINK_IDLE_EXPIRE);
2901
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002902mount_fail_check:
2903 /* on error free sesinfo and tcon struct if needed */
2904 if (rc) {
2905 if (mount_data != mount_data_global)
2906 kfree(mount_data);
2907 /* If find_unc succeeded then rc == 0 so we can not end */
2908 /* up accidently freeing someone elses tcon struct */
2909 if (tcon)
2910 cifs_put_tcon(tcon);
2911 else if (pSesInfo)
2912 cifs_put_smb_ses(pSesInfo);
2913 else
2914 cifs_put_tcp_session(srvTcp);
2915 goto out;
2916 }
2917
Jeff Layton7586b762008-12-01 18:41:49 -05002918 /* volume_info->password is freed above when existing session found
Linus Torvalds1da177e2005-04-16 15:20:36 -07002919 (in which case it is not needed anymore) but when new sesion is created
2920 the password ptr is put in the new session structure (in which case the
2921 password will be freed at unmount time) */
Jeff Layton70fe7dc2007-11-16 22:21:07 +00002922out:
2923 /* zero out password before freeing */
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002924 cleanup_volume_info(&volume_info);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002925 FreeXid(xid);
2926 return rc;
2927}
2928
Linus Torvalds1da177e2005-04-16 15:20:36 -07002929int
2930CIFSTCon(unsigned int xid, struct cifsSesInfo *ses,
2931 const char *tree, struct cifsTconInfo *tcon,
2932 const struct nls_table *nls_codepage)
2933{
2934 struct smb_hdr *smb_buffer;
2935 struct smb_hdr *smb_buffer_response;
2936 TCONX_REQ *pSMB;
2937 TCONX_RSP *pSMBr;
2938 unsigned char *bcc_ptr;
2939 int rc = 0;
Jeff Laytoncc20c032009-04-30 07:16:21 -04002940 int length, bytes_left;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002941 __u16 count;
2942
2943 if (ses == NULL)
2944 return -EIO;
2945
2946 smb_buffer = cifs_buf_get();
Steve Frenchca43e3b2009-09-01 17:20:50 +00002947 if (smb_buffer == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002948 return -ENOMEM;
Steve Frenchca43e3b2009-09-01 17:20:50 +00002949
Linus Torvalds1da177e2005-04-16 15:20:36 -07002950 smb_buffer_response = smb_buffer;
2951
2952 header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX,
2953 NULL /*no tid */ , 4 /*wct */ );
Steve French1982c342005-08-17 12:38:22 -07002954
2955 smb_buffer->Mid = GetNextMid(ses->server);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002956 smb_buffer->Uid = ses->Suid;
2957 pSMB = (TCONX_REQ *) smb_buffer;
2958 pSMBr = (TCONX_RSP *) smb_buffer_response;
2959
2960 pSMB->AndXCommand = 0xFF;
2961 pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002962 bcc_ptr = &pSMB->Password[0];
Steve Frenchfb8c4b12007-07-10 01:16:18 +00002963 if ((ses->server->secMode) & SECMODE_USER) {
Steve Frencheeac8042006-01-13 21:34:58 -08002964 pSMB->PasswordLength = cpu_to_le16(1); /* minimum */
Steve French7c7b25b2006-06-01 19:20:10 +00002965 *bcc_ptr = 0; /* password is null byte */
Steve Frencheeac8042006-01-13 21:34:58 -08002966 bcc_ptr++; /* skip password */
Steve French7c7b25b2006-06-01 19:20:10 +00002967 /* already aligned so no need to do it below */
Steve Frencheeac8042006-01-13 21:34:58 -08002968 } else {
Shirish Pargaonkar540b2e32011-01-18 22:33:54 -06002969 pSMB->PasswordLength = cpu_to_le16(CIFS_AUTH_RESP_SIZE);
Steve Frencheeac8042006-01-13 21:34:58 -08002970 /* BB FIXME add code to fail this if NTLMv2 or Kerberos
2971 specified as required (when that support is added to
2972 the vfs in the future) as only NTLM or the much
Steve French7c7b25b2006-06-01 19:20:10 +00002973 weaker LANMAN (which we do not send by default) is accepted
Steve Frencheeac8042006-01-13 21:34:58 -08002974 by Samba (not sure whether other servers allow
2975 NTLMv2 password here) */
Steve French7c7b25b2006-06-01 19:20:10 +00002976#ifdef CONFIG_CIFS_WEAK_PW_HASH
Jeff Layton04912d62010-04-24 07:57:45 -04002977 if ((global_secflags & CIFSSEC_MAY_LANMAN) &&
Jeff Layton00e485b2008-12-05 20:41:21 -05002978 (ses->server->secType == LANMAN))
Shirish Pargaonkard3ba50b2010-10-27 15:20:36 -05002979 calc_lanman_hash(tcon->password, ses->server->cryptkey,
Jeff Layton4e53a3f2008-12-05 20:41:21 -05002980 ses->server->secMode &
2981 SECMODE_PW_ENCRYPT ? true : false,
2982 bcc_ptr);
Steve French7c7b25b2006-06-01 19:20:10 +00002983 else
2984#endif /* CIFS_WEAK_PW_HASH */
Shirish Pargaonkard3ba50b2010-10-27 15:20:36 -05002985 SMBNTencrypt(tcon->password, ses->server->cryptkey, bcc_ptr);
Steve Frencheeac8042006-01-13 21:34:58 -08002986
Shirish Pargaonkar540b2e32011-01-18 22:33:54 -06002987 bcc_ptr += CIFS_AUTH_RESP_SIZE;
Steve Frenchfb8c4b12007-07-10 01:16:18 +00002988 if (ses->capabilities & CAP_UNICODE) {
Steve French7c7b25b2006-06-01 19:20:10 +00002989 /* must align unicode strings */
2990 *bcc_ptr = 0; /* null byte password */
2991 bcc_ptr++;
2992 }
Steve Frencheeac8042006-01-13 21:34:58 -08002993 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002994
Steve French50c2f752007-07-13 00:33:32 +00002995 if (ses->server->secMode &
Steve Frencha878fb22006-05-30 18:04:19 +00002996 (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002997 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2998
2999 if (ses->capabilities & CAP_STATUS32) {
3000 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
3001 }
3002 if (ses->capabilities & CAP_DFS) {
3003 smb_buffer->Flags2 |= SMBFLG2_DFS;
3004 }
3005 if (ses->capabilities & CAP_UNICODE) {
3006 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
3007 length =
Steve French50c2f752007-07-13 00:33:32 +00003008 cifs_strtoUCS((__le16 *) bcc_ptr, tree,
3009 6 /* max utf8 char length in bytes */ *
Steve Frencha878fb22006-05-30 18:04:19 +00003010 (/* server len*/ + 256 /* share len */), nls_codepage);
3011 bcc_ptr += 2 * length; /* convert num 16 bit words to bytes */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003012 bcc_ptr += 2; /* skip trailing null */
3013 } else { /* ASCII */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003014 strcpy(bcc_ptr, tree);
3015 bcc_ptr += strlen(tree) + 1;
3016 }
3017 strcpy(bcc_ptr, "?????");
3018 bcc_ptr += strlen("?????");
3019 bcc_ptr += 1;
3020 count = bcc_ptr - &pSMB->Password[0];
3021 pSMB->hdr.smb_buf_length += count;
3022 pSMB->ByteCount = cpu_to_le16(count);
3023
Steve French133672e2007-11-13 22:41:37 +00003024 rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length,
Jeff Layton77499812011-01-11 07:24:23 -05003025 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003026
Linus Torvalds1da177e2005-04-16 15:20:36 -07003027 /* above now done in SendReceive */
3028 if ((rc == 0) && (tcon != NULL)) {
Steve French0e0d2cf2009-05-01 05:27:32 +00003029 bool is_unicode;
3030
Linus Torvalds1da177e2005-04-16 15:20:36 -07003031 tcon->tidStatus = CifsGood;
Steve French3b795212008-11-13 19:45:32 +00003032 tcon->need_reconnect = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003033 tcon->tid = smb_buffer_response->Tid;
3034 bcc_ptr = pByteArea(smb_buffer_response);
Jeff Laytoncc20c032009-04-30 07:16:21 -04003035 bytes_left = BCC(smb_buffer_response);
3036 length = strnlen(bcc_ptr, bytes_left - 2);
Steve French0e0d2cf2009-05-01 05:27:32 +00003037 if (smb_buffer->Flags2 & SMBFLG2_UNICODE)
3038 is_unicode = true;
3039 else
3040 is_unicode = false;
3041
Jeff Laytoncc20c032009-04-30 07:16:21 -04003042
Steve French50c2f752007-07-13 00:33:32 +00003043 /* skip service field (NB: this field is always ASCII) */
Steve French7f8ed422007-09-28 22:28:55 +00003044 if (length == 3) {
3045 if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') &&
3046 (bcc_ptr[2] == 'C')) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00003047 cFYI(1, "IPC connection");
Steve French7f8ed422007-09-28 22:28:55 +00003048 tcon->ipc = 1;
3049 }
3050 } else if (length == 2) {
3051 if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) {
3052 /* the most common case */
Joe Perchesb6b38f72010-04-21 03:50:45 +00003053 cFYI(1, "disk share connection");
Steve French7f8ed422007-09-28 22:28:55 +00003054 }
3055 }
Steve French50c2f752007-07-13 00:33:32 +00003056 bcc_ptr += length + 1;
Jeff Laytoncc20c032009-04-30 07:16:21 -04003057 bytes_left -= (length + 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003058 strncpy(tcon->treeName, tree, MAX_TREE_SIZE);
Jeff Laytoncc20c032009-04-30 07:16:21 -04003059
3060 /* mostly informational -- no need to fail on error here */
Jeff Layton90a98b22009-07-20 13:40:52 -04003061 kfree(tcon->nativeFileSystem);
Steve Frenchd185cda2009-04-30 17:45:10 +00003062 tcon->nativeFileSystem = cifs_strndup_from_ucs(bcc_ptr,
Steve French0e0d2cf2009-05-01 05:27:32 +00003063 bytes_left, is_unicode,
Jeff Laytoncc20c032009-04-30 07:16:21 -04003064 nls_codepage);
3065
Joe Perchesb6b38f72010-04-21 03:50:45 +00003066 cFYI(1, "nativeFileSystem=%s", tcon->nativeFileSystem);
Jeff Laytoncc20c032009-04-30 07:16:21 -04003067
Steve Frenchfb8c4b12007-07-10 01:16:18 +00003068 if ((smb_buffer_response->WordCount == 3) ||
Steve French1a4e15a2006-10-12 21:33:51 +00003069 (smb_buffer_response->WordCount == 7))
3070 /* field is in same location */
Steve French39798772006-05-31 22:40:51 +00003071 tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport);
3072 else
3073 tcon->Flags = 0;
Joe Perchesb6b38f72010-04-21 03:50:45 +00003074 cFYI(1, "Tcon flags: 0x%x ", tcon->Flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003075 } else if ((rc == 0) && tcon == NULL) {
Steve French50c2f752007-07-13 00:33:32 +00003076 /* all we need to save for IPC$ connection */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003077 ses->ipc_tid = smb_buffer_response->Tid;
3078 }
3079
Mariusz Kozlowskia8a11d32007-10-03 16:41:24 +00003080 cifs_buf_release(smb_buffer);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003081 return rc;
3082}
3083
3084int
3085cifs_umount(struct super_block *sb, struct cifs_sb_info *cifs_sb)
3086{
Jeff Laytonb647c352010-10-28 11:16:44 -04003087 struct rb_root *root = &cifs_sb->tlink_tree;
3088 struct rb_node *node;
3089 struct tcon_link *tlink;
Steve French50c2f752007-07-13 00:33:32 +00003090 char *tmp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003091
Jeff Layton2de970f2010-10-06 19:51:12 -04003092 cancel_delayed_work_sync(&cifs_sb->prune_tlinks);
3093
Jeff Laytonb647c352010-10-28 11:16:44 -04003094 spin_lock(&cifs_sb->tlink_tree_lock);
3095 while ((node = rb_first(root))) {
3096 tlink = rb_entry(node, struct tcon_link, tl_rbnode);
3097 cifs_get_tlink(tlink);
3098 clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags);
3099 rb_erase(node, root);
Steve French50c2f752007-07-13 00:33:32 +00003100
Jeff Laytonb647c352010-10-28 11:16:44 -04003101 spin_unlock(&cifs_sb->tlink_tree_lock);
3102 cifs_put_tlink(tlink);
3103 spin_lock(&cifs_sb->tlink_tree_lock);
3104 }
3105 spin_unlock(&cifs_sb->tlink_tree_lock);
Jeff Layton9d002df2010-10-06 19:51:11 -04003106
Steve French2fe87f02006-09-21 07:02:52 +00003107 tmp = cifs_sb->prepath;
3108 cifs_sb->prepathlen = 0;
3109 cifs_sb->prepath = NULL;
3110 kfree(tmp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003111
Jeff Layton9d002df2010-10-06 19:51:11 -04003112 return 0;
Steve French50c2f752007-07-13 00:33:32 +00003113}
Linus Torvalds1da177e2005-04-16 15:20:36 -07003114
Jeff Layton198b5682010-04-24 07:57:48 -04003115int cifs_negotiate_protocol(unsigned int xid, struct cifsSesInfo *ses)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003116{
3117 int rc = 0;
Jeff Layton198b5682010-04-24 07:57:48 -04003118 struct TCP_Server_Info *server = ses->server;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003119
Jeff Layton198b5682010-04-24 07:57:48 -04003120 /* only send once per connect */
3121 if (server->maxBuf != 0)
3122 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003123
Jeff Layton198b5682010-04-24 07:57:48 -04003124 rc = CIFSSMBNegotiate(xid, ses);
3125 if (rc == -EAGAIN) {
3126 /* retry only once on 1st time connection */
3127 rc = CIFSSMBNegotiate(xid, ses);
3128 if (rc == -EAGAIN)
3129 rc = -EHOSTDOWN;
3130 }
3131 if (rc == 0) {
3132 spin_lock(&GlobalMid_Lock);
3133 if (server->tcpStatus != CifsExiting)
3134 server->tcpStatus = CifsGood;
3135 else
3136 rc = -EHOSTDOWN;
3137 spin_unlock(&GlobalMid_Lock);
3138
Linus Torvalds1da177e2005-04-16 15:20:36 -07003139 }
Steve French26b994f2008-08-06 05:11:33 +00003140
Jeff Layton198b5682010-04-24 07:57:48 -04003141 return rc;
3142}
Steve French26b994f2008-08-06 05:11:33 +00003143
Jeff Layton198b5682010-04-24 07:57:48 -04003144
3145int cifs_setup_session(unsigned int xid, struct cifsSesInfo *ses,
3146 struct nls_table *nls_info)
3147{
3148 int rc = 0;
3149 struct TCP_Server_Info *server = ses->server;
3150
3151 ses->flags = 0;
3152 ses->capabilities = server->capabilities;
Steve French26b994f2008-08-06 05:11:33 +00003153 if (linuxExtEnabled == 0)
Jeff Layton198b5682010-04-24 07:57:48 -04003154 ses->capabilities &= (~CAP_UNIX);
Steve French20418ac2009-04-30 16:13:32 +00003155
Joe Perchesb6b38f72010-04-21 03:50:45 +00003156 cFYI(1, "Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d",
3157 server->secMode, server->capabilities, server->timeAdj);
Jeff Laytoncb7691b2008-08-18 15:41:05 -04003158
Jeff Layton198b5682010-04-24 07:57:48 -04003159 rc = CIFS_SessSetup(xid, ses, nls_info);
Steve French26b994f2008-08-06 05:11:33 +00003160 if (rc) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00003161 cERROR(1, "Send error in SessSetup = %d", rc);
Steve French26b994f2008-08-06 05:11:33 +00003162 } else {
Shirish Pargaonkar5d0d2882010-10-13 18:15:00 -05003163 mutex_lock(&ses->server->srv_mutex);
3164 if (!server->session_estab) {
Shirish Pargaonkar21e73392010-10-21 06:42:55 -05003165 server->session_key.response = ses->auth_key.response;
Shirish Pargaonkar5d0d2882010-10-13 18:15:00 -05003166 server->session_key.len = ses->auth_key.len;
Shirish Pargaonkar21e73392010-10-21 06:42:55 -05003167 server->sequence_number = 0x2;
3168 server->session_estab = true;
3169 ses->auth_key.response = NULL;
Shirish Pargaonkar5d0d2882010-10-13 18:15:00 -05003170 }
3171 mutex_unlock(&server->srv_mutex);
3172
Joe Perchesb6b38f72010-04-21 03:50:45 +00003173 cFYI(1, "CIFS Session Established successfully");
Steve French20418ac2009-04-30 16:13:32 +00003174 spin_lock(&GlobalMid_Lock);
Jeff Layton198b5682010-04-24 07:57:48 -04003175 ses->status = CifsGood;
3176 ses->need_reconnect = false;
Steve French20418ac2009-04-30 16:13:32 +00003177 spin_unlock(&GlobalMid_Lock);
Steve French26b994f2008-08-06 05:11:33 +00003178 }
3179
Shirish Pargaonkar21e73392010-10-21 06:42:55 -05003180 kfree(ses->auth_key.response);
3181 ses->auth_key.response = NULL;
3182 ses->auth_key.len = 0;
Shirish Pargaonkard3686d52010-10-28 09:53:07 -05003183 kfree(ses->ntlmssp);
3184 ses->ntlmssp = NULL;
Shirish Pargaonkar21e73392010-10-21 06:42:55 -05003185
Linus Torvalds1da177e2005-04-16 15:20:36 -07003186 return rc;
3187}
3188
Steve Frenchd2445552010-10-08 03:38:46 +00003189static struct cifsTconInfo *
Jeff Layton9d002df2010-10-06 19:51:11 -04003190cifs_construct_tcon(struct cifs_sb_info *cifs_sb, uid_t fsuid)
3191{
3192 struct cifsTconInfo *master_tcon = cifs_sb_master_tcon(cifs_sb);
3193 struct cifsSesInfo *ses;
3194 struct cifsTconInfo *tcon = NULL;
3195 struct smb_vol *vol_info;
3196 char username[MAX_USERNAME_SIZE + 1];
3197
3198 vol_info = kzalloc(sizeof(*vol_info), GFP_KERNEL);
3199 if (vol_info == NULL) {
3200 tcon = ERR_PTR(-ENOMEM);
3201 goto out;
3202 }
3203
3204 snprintf(username, MAX_USERNAME_SIZE, "krb50x%x", fsuid);
3205 vol_info->username = username;
3206 vol_info->local_nls = cifs_sb->local_nls;
3207 vol_info->linux_uid = fsuid;
3208 vol_info->cred_uid = fsuid;
3209 vol_info->UNC = master_tcon->treeName;
3210 vol_info->retry = master_tcon->retry;
3211 vol_info->nocase = master_tcon->nocase;
3212 vol_info->local_lease = master_tcon->local_lease;
3213 vol_info->no_linux_ext = !master_tcon->unix_ext;
3214
3215 /* FIXME: allow for other secFlg settings */
3216 vol_info->secFlg = CIFSSEC_MUST_KRB5;
3217
3218 /* get a reference for the same TCP session */
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05303219 spin_lock(&cifs_tcp_ses_lock);
Jeff Layton9d002df2010-10-06 19:51:11 -04003220 ++master_tcon->ses->server->srv_count;
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05303221 spin_unlock(&cifs_tcp_ses_lock);
Jeff Layton9d002df2010-10-06 19:51:11 -04003222
3223 ses = cifs_get_smb_ses(master_tcon->ses->server, vol_info);
3224 if (IS_ERR(ses)) {
3225 tcon = (struct cifsTconInfo *)ses;
3226 cifs_put_tcp_session(master_tcon->ses->server);
3227 goto out;
3228 }
3229
3230 tcon = cifs_get_tcon(ses, vol_info);
3231 if (IS_ERR(tcon)) {
3232 cifs_put_smb_ses(ses);
3233 goto out;
3234 }
3235
3236 if (ses->capabilities & CAP_UNIX)
3237 reset_cifs_unix_caps(0, tcon, NULL, vol_info);
3238out:
3239 kfree(vol_info);
3240
3241 return tcon;
3242}
3243
Jeff Layton413e6612010-10-28 13:33:38 -04003244static inline struct tcon_link *
Jeff Layton9d002df2010-10-06 19:51:11 -04003245cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb)
3246{
Jeff Layton413e6612010-10-28 13:33:38 -04003247 return cifs_sb->master_tlink;
Jeff Layton9d002df2010-10-06 19:51:11 -04003248}
3249
3250struct cifsTconInfo *
3251cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb)
3252{
3253 return tlink_tcon(cifs_sb_master_tlink(cifs_sb));
3254}
3255
3256static int
3257cifs_sb_tcon_pending_wait(void *unused)
3258{
3259 schedule();
3260 return signal_pending(current) ? -ERESTARTSYS : 0;
3261}
3262
Jeff Laytonb647c352010-10-28 11:16:44 -04003263/* find and return a tlink with given uid */
3264static struct tcon_link *
3265tlink_rb_search(struct rb_root *root, uid_t uid)
3266{
3267 struct rb_node *node = root->rb_node;
3268 struct tcon_link *tlink;
3269
3270 while (node) {
3271 tlink = rb_entry(node, struct tcon_link, tl_rbnode);
3272
3273 if (tlink->tl_uid > uid)
3274 node = node->rb_left;
3275 else if (tlink->tl_uid < uid)
3276 node = node->rb_right;
3277 else
3278 return tlink;
3279 }
3280 return NULL;
3281}
3282
3283/* insert a tcon_link into the tree */
3284static void
3285tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink)
3286{
3287 struct rb_node **new = &(root->rb_node), *parent = NULL;
3288 struct tcon_link *tlink;
3289
3290 while (*new) {
3291 tlink = rb_entry(*new, struct tcon_link, tl_rbnode);
3292 parent = *new;
3293
3294 if (tlink->tl_uid > new_tlink->tl_uid)
3295 new = &((*new)->rb_left);
3296 else
3297 new = &((*new)->rb_right);
3298 }
3299
3300 rb_link_node(&new_tlink->tl_rbnode, parent, new);
3301 rb_insert_color(&new_tlink->tl_rbnode, root);
3302}
3303
Jeff Layton9d002df2010-10-06 19:51:11 -04003304/*
3305 * Find or construct an appropriate tcon given a cifs_sb and the fsuid of the
3306 * current task.
3307 *
3308 * If the superblock doesn't refer to a multiuser mount, then just return
3309 * the master tcon for the mount.
3310 *
Suresh Jayaraman6ef933a2010-11-03 10:53:49 +05303311 * First, search the rbtree for an existing tcon for this fsuid. If one
Jeff Layton9d002df2010-10-06 19:51:11 -04003312 * exists, then check to see if it's pending construction. If it is then wait
3313 * for construction to complete. Once it's no longer pending, check to see if
3314 * it failed and either return an error or retry construction, depending on
3315 * the timeout.
3316 *
3317 * If one doesn't exist then insert a new tcon_link struct into the tree and
3318 * try to construct a new one.
3319 */
3320struct tcon_link *
3321cifs_sb_tlink(struct cifs_sb_info *cifs_sb)
3322{
3323 int ret;
Jeff Laytonb647c352010-10-28 11:16:44 -04003324 uid_t fsuid = current_fsuid();
Jeff Layton9d002df2010-10-06 19:51:11 -04003325 struct tcon_link *tlink, *newtlink;
3326
3327 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER))
3328 return cifs_get_tlink(cifs_sb_master_tlink(cifs_sb));
3329
3330 spin_lock(&cifs_sb->tlink_tree_lock);
Jeff Laytonb647c352010-10-28 11:16:44 -04003331 tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid);
Jeff Layton9d002df2010-10-06 19:51:11 -04003332 if (tlink)
3333 cifs_get_tlink(tlink);
3334 spin_unlock(&cifs_sb->tlink_tree_lock);
3335
3336 if (tlink == NULL) {
3337 newtlink = kzalloc(sizeof(*tlink), GFP_KERNEL);
3338 if (newtlink == NULL)
3339 return ERR_PTR(-ENOMEM);
Jeff Laytonb647c352010-10-28 11:16:44 -04003340 newtlink->tl_uid = fsuid;
Jeff Layton9d002df2010-10-06 19:51:11 -04003341 newtlink->tl_tcon = ERR_PTR(-EACCES);
3342 set_bit(TCON_LINK_PENDING, &newtlink->tl_flags);
3343 set_bit(TCON_LINK_IN_TREE, &newtlink->tl_flags);
3344 cifs_get_tlink(newtlink);
3345
Jeff Layton9d002df2010-10-06 19:51:11 -04003346 spin_lock(&cifs_sb->tlink_tree_lock);
3347 /* was one inserted after previous search? */
Jeff Laytonb647c352010-10-28 11:16:44 -04003348 tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid);
Jeff Layton9d002df2010-10-06 19:51:11 -04003349 if (tlink) {
3350 cifs_get_tlink(tlink);
3351 spin_unlock(&cifs_sb->tlink_tree_lock);
Jeff Layton9d002df2010-10-06 19:51:11 -04003352 kfree(newtlink);
3353 goto wait_for_construction;
3354 }
Jeff Layton9d002df2010-10-06 19:51:11 -04003355 tlink = newtlink;
Jeff Laytonb647c352010-10-28 11:16:44 -04003356 tlink_rb_insert(&cifs_sb->tlink_tree, tlink);
3357 spin_unlock(&cifs_sb->tlink_tree_lock);
Jeff Layton9d002df2010-10-06 19:51:11 -04003358 } else {
3359wait_for_construction:
3360 ret = wait_on_bit(&tlink->tl_flags, TCON_LINK_PENDING,
3361 cifs_sb_tcon_pending_wait,
3362 TASK_INTERRUPTIBLE);
3363 if (ret) {
3364 cifs_put_tlink(tlink);
3365 return ERR_PTR(ret);
3366 }
3367
3368 /* if it's good, return it */
3369 if (!IS_ERR(tlink->tl_tcon))
3370 return tlink;
3371
3372 /* return error if we tried this already recently */
3373 if (time_before(jiffies, tlink->tl_time + TLINK_ERROR_EXPIRE)) {
3374 cifs_put_tlink(tlink);
3375 return ERR_PTR(-EACCES);
3376 }
3377
3378 if (test_and_set_bit(TCON_LINK_PENDING, &tlink->tl_flags))
3379 goto wait_for_construction;
3380 }
3381
3382 tlink->tl_tcon = cifs_construct_tcon(cifs_sb, fsuid);
3383 clear_bit(TCON_LINK_PENDING, &tlink->tl_flags);
3384 wake_up_bit(&tlink->tl_flags, TCON_LINK_PENDING);
3385
3386 if (IS_ERR(tlink->tl_tcon)) {
3387 cifs_put_tlink(tlink);
3388 return ERR_PTR(-EACCES);
3389 }
3390
3391 return tlink;
3392}
Jeff Layton2de970f2010-10-06 19:51:12 -04003393
3394/*
3395 * periodic workqueue job that scans tcon_tree for a superblock and closes
3396 * out tcons.
3397 */
3398static void
3399cifs_prune_tlinks(struct work_struct *work)
3400{
3401 struct cifs_sb_info *cifs_sb = container_of(work, struct cifs_sb_info,
3402 prune_tlinks.work);
Jeff Laytonb647c352010-10-28 11:16:44 -04003403 struct rb_root *root = &cifs_sb->tlink_tree;
3404 struct rb_node *node = rb_first(root);
3405 struct rb_node *tmp;
3406 struct tcon_link *tlink;
Jeff Layton2de970f2010-10-06 19:51:12 -04003407
Jeff Laytonb647c352010-10-28 11:16:44 -04003408 /*
3409 * Because we drop the spinlock in the loop in order to put the tlink
3410 * it's not guarded against removal of links from the tree. The only
3411 * places that remove entries from the tree are this function and
3412 * umounts. Because this function is non-reentrant and is canceled
3413 * before umount can proceed, this is safe.
3414 */
3415 spin_lock(&cifs_sb->tlink_tree_lock);
3416 node = rb_first(root);
3417 while (node != NULL) {
3418 tmp = node;
3419 node = rb_next(tmp);
3420 tlink = rb_entry(tmp, struct tcon_link, tl_rbnode);
3421
3422 if (test_bit(TCON_LINK_MASTER, &tlink->tl_flags) ||
3423 atomic_read(&tlink->tl_count) != 0 ||
3424 time_after(tlink->tl_time + TLINK_IDLE_EXPIRE, jiffies))
3425 continue;
3426
3427 cifs_get_tlink(tlink);
3428 clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags);
3429 rb_erase(tmp, root);
3430
Jeff Layton2de970f2010-10-06 19:51:12 -04003431 spin_unlock(&cifs_sb->tlink_tree_lock);
Jeff Laytonb647c352010-10-28 11:16:44 -04003432 cifs_put_tlink(tlink);
3433 spin_lock(&cifs_sb->tlink_tree_lock);
3434 }
3435 spin_unlock(&cifs_sb->tlink_tree_lock);
Jeff Layton2de970f2010-10-06 19:51:12 -04003436
3437 queue_delayed_work(system_nrt_wq, &cifs_sb->prune_tlinks,
3438 TLINK_IDLE_EXPIRE);
3439}