blob: 633c246b67752efe0f7460cb01e8ac62309314e8 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * fs/cifs/connect.c
3 *
Steve Frenchd185cda2009-04-30 17:45:10 +00004 * Copyright (C) International Business Machines Corp., 2002,2009
Linus Torvalds1da177e2005-04-16 15:20:36 -07005 * Author(s): Steve French (sfrench@us.ibm.com)
6 *
7 * This library is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU Lesser General Public License as published
9 * by the Free Software Foundation; either version 2.1 of the License, or
10 * (at your option) any later version.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
15 * the GNU Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public License
18 * along with this library; if not, write to the Free Software
Steve Frenchfb8c4b12007-07-10 01:16:18 +000019 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Linus Torvalds1da177e2005-04-16 15:20:36 -070020 */
21#include <linux/fs.h>
22#include <linux/net.h>
23#include <linux/string.h>
24#include <linux/list.h>
25#include <linux/wait.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090026#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#include <linux/pagemap.h>
28#include <linux/ctype.h>
29#include <linux/utsname.h>
30#include <linux/mempool.h>
Steve Frenchb8643e12005-04-28 22:41:07 -070031#include <linux/delay.h>
Steve Frenchf1914012005-08-18 09:37:34 -070032#include <linux/completion.h>
Igor Mammedovaaf737a2007-04-03 19:16:43 +000033#include <linux/kthread.h>
Steve French0ae0efa2005-10-10 10:57:19 -070034#include <linux/pagevec.h>
Nigel Cunningham7dfb7102006-12-06 20:34:23 -080035#include <linux/freezer.h>
Igor Mammedov5c2503a2009-04-21 19:31:05 +040036#include <linux/namei.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070037#include <asm/uaccess.h>
38#include <asm/processor.h>
Jeff Layton50b64e32009-06-02 06:55:20 -040039#include <linux/inet.h>
Steve French0e2beda2009-01-30 21:24:41 +000040#include <net/ipv6.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070041#include "cifspdu.h"
42#include "cifsglob.h"
43#include "cifsproto.h"
44#include "cifs_unicode.h"
45#include "cifs_debug.h"
46#include "cifs_fs_sb.h"
47#include "ntlmssp.h"
48#include "nterr.h"
49#include "rfc1002pdu.h"
Suresh Jayaraman488f1d2d2010-07-05 18:12:15 +053050#include "fscache.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070051
52#define CIFS_PORT 445
53#define RFC1001_PORT 139
54
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 mempool_t *cifs_req_poolp;
59
Jeff Layton2de970f2010-10-06 19:51:12 -040060/* FIXME: should these be tunable? */
Jeff Layton9d002df2010-10-06 19:51:11 -040061#define TLINK_ERROR_EXPIRE (1 * HZ)
Jeff Layton2de970f2010-10-06 19:51:12 -040062#define TLINK_IDLE_EXPIRE (600 * HZ)
Jeff Layton9d002df2010-10-06 19:51:11 -040063
Pavel Shilovskya9f1b852010-12-13 19:08:35 +030064static int ip_connect(struct TCP_Server_Info *server);
65static int generic_ip_connect(struct TCP_Server_Info *server);
Jeff Laytonb647c352010-10-28 11:16:44 -040066static void tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink);
Jeff Layton2de970f2010-10-06 19:51:12 -040067static void cifs_prune_tlinks(struct work_struct *work);
Jeff Laytonb9bce2e2011-07-06 08:10:39 -040068static int cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data,
69 const char *devname);
Linus Torvalds1da177e2005-04-16 15:20:36 -070070
Jeff Laytond5c56052008-12-01 18:42:33 -050071/*
72 * cifs tcp session reconnection
73 *
74 * mark tcp session as reconnecting so temporarily locked
75 * mark all smb sessions as reconnecting for tcp session
76 * reconnect tcp session
77 * wake up waiters on reconnection? - (not needed currently)
78 */
Steve French2cd646a2006-09-28 19:43:08 +000079static int
Linus Torvalds1da177e2005-04-16 15:20:36 -070080cifs_reconnect(struct TCP_Server_Info *server)
81{
82 int rc = 0;
Jeff Laytonf1987b42008-11-15 11:12:47 -050083 struct list_head *tmp, *tmp2;
Steve French96daf2b2011-05-27 04:34:02 +000084 struct cifs_ses *ses;
85 struct cifs_tcon *tcon;
Steve Frenchfb8c4b12007-07-10 01:16:18 +000086 struct mid_q_entry *mid_entry;
Jeff Layton3c1105d2011-05-22 07:09:13 -040087 struct list_head retry_list;
Steve French50c2f752007-07-13 00:33:32 +000088
Linus Torvalds1da177e2005-04-16 15:20:36 -070089 spin_lock(&GlobalMid_Lock);
Jeff Layton469ee612008-10-16 18:46:39 +000090 if (server->tcpStatus == CifsExiting) {
Steve Frenchfb8c4b12007-07-10 01:16:18 +000091 /* the demux thread will exit normally
Linus Torvalds1da177e2005-04-16 15:20:36 -070092 next time through the loop */
93 spin_unlock(&GlobalMid_Lock);
94 return rc;
95 } else
96 server->tcpStatus = CifsNeedReconnect;
97 spin_unlock(&GlobalMid_Lock);
98 server->maxBuf = 0;
99
Joe Perchesb6b38f72010-04-21 03:50:45 +0000100 cFYI(1, "Reconnecting tcp session");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101
102 /* before reconnecting the tcp session, mark the smb session (uid)
103 and the tid bad so they are not used until reconnected */
Jeff Layton2b84a36c2011-01-11 07:24:21 -0500104 cFYI(1, "%s: marking sessions and tcons for reconnect", __func__);
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +0530105 spin_lock(&cifs_tcp_ses_lock);
Jeff Layton14fbf502008-11-14 13:53:46 -0500106 list_for_each(tmp, &server->smb_ses_list) {
Steve French96daf2b2011-05-27 04:34:02 +0000107 ses = list_entry(tmp, struct cifs_ses, smb_ses_list);
Jeff Layton14fbf502008-11-14 13:53:46 -0500108 ses->need_reconnect = true;
109 ses->ipc_tid = 0;
Jeff Laytonf1987b42008-11-15 11:12:47 -0500110 list_for_each(tmp2, &ses->tcon_list) {
Steve French96daf2b2011-05-27 04:34:02 +0000111 tcon = list_entry(tmp2, struct cifs_tcon, tcon_list);
Jeff Laytonf1987b42008-11-15 11:12:47 -0500112 tcon->need_reconnect = true;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114 }
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +0530115 spin_unlock(&cifs_tcp_ses_lock);
Jeff Layton2b84a36c2011-01-11 07:24:21 -0500116
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117 /* do not want to be sending data on a socket we are freeing */
Jeff Layton2b84a36c2011-01-11 07:24:21 -0500118 cFYI(1, "%s: tearing down socket", __func__);
Jeff Layton72ca5452008-12-01 07:09:36 -0500119 mutex_lock(&server->srv_mutex);
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000120 if (server->ssocket) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000121 cFYI(1, "State: 0x%x Flags: 0x%lx", server->ssocket->state,
122 server->ssocket->flags);
Trond Myklebust91cf45f2007-11-12 18:10:39 -0800123 kernel_sock_shutdown(server->ssocket, SHUT_WR);
Joe Perchesb6b38f72010-04-21 03:50:45 +0000124 cFYI(1, "Post shutdown state: 0x%x Flags: 0x%lx",
Steve French467a8f82007-06-27 22:41:32 +0000125 server->ssocket->state,
Joe Perchesb6b38f72010-04-21 03:50:45 +0000126 server->ssocket->flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127 sock_release(server->ssocket);
128 server->ssocket = NULL;
129 }
Shirish Pargaonkar5d0d2882010-10-13 18:15:00 -0500130 server->sequence_number = 0;
131 server->session_estab = false;
Shirish Pargaonkar21e73392010-10-21 06:42:55 -0500132 kfree(server->session_key.response);
133 server->session_key.response = NULL;
134 server->session_key.len = 0;
Steve Frenchfda35942011-01-20 18:06:34 +0000135 server->lstrp = jiffies;
Jeff Layton2b84a36c2011-01-11 07:24:21 -0500136 mutex_unlock(&server->srv_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137
Jeff Layton2b84a36c2011-01-11 07:24:21 -0500138 /* mark submitted MIDs for retry and issue callback */
Jeff Layton3c1105d2011-05-22 07:09:13 -0400139 INIT_LIST_HEAD(&retry_list);
140 cFYI(1, "%s: moving mids to private list", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141 spin_lock(&GlobalMid_Lock);
Jeff Layton2b84a36c2011-01-11 07:24:21 -0500142 list_for_each_safe(tmp, tmp2, &server->pending_mid_q) {
143 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
144 if (mid_entry->midState == MID_REQUEST_SUBMITTED)
Steve Frenchad8b15f2008-08-08 21:10:16 +0000145 mid_entry->midState = MID_RETRY_NEEDED;
Jeff Layton3c1105d2011-05-22 07:09:13 -0400146 list_move(&mid_entry->qhead, &retry_list);
147 }
148 spin_unlock(&GlobalMid_Lock);
149
150 cFYI(1, "%s: issuing mid callbacks", __func__);
151 list_for_each_safe(tmp, tmp2, &retry_list) {
152 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
Jeff Layton2b84a36c2011-01-11 07:24:21 -0500153 list_del_init(&mid_entry->qhead);
154 mid_entry->callback(mid_entry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156
Jeff Layton7fdbaa12011-06-10 16:14:57 -0400157 do {
Steve French6c3d8902006-07-31 22:46:20 +0000158 try_to_freeze();
Pavel Shilovskya9f1b852010-12-13 19:08:35 +0300159
160 /* we should try only the port we connected to before */
161 rc = generic_ip_connect(server);
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000162 if (rc) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000163 cFYI(1, "reconnect error %d", rc);
Steve French0cb766a2005-04-28 22:41:11 -0700164 msleep(3000);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165 } else {
166 atomic_inc(&tcpSesReconnectCount);
167 spin_lock(&GlobalMid_Lock);
Jeff Layton469ee612008-10-16 18:46:39 +0000168 if (server->tcpStatus != CifsExiting)
Steve Frenchfd88ce92011-04-12 01:01:14 +0000169 server->tcpStatus = CifsNeedNegotiate;
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000170 spin_unlock(&GlobalMid_Lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171 }
Jeff Layton7fdbaa12011-06-10 16:14:57 -0400172 } while (server->tcpStatus == CifsNeedReconnect);
Jeff Layton2b84a36c2011-01-11 07:24:21 -0500173
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174 return rc;
175}
176
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000177/*
Steve Frenche4eb2952005-04-28 22:41:09 -0700178 return codes:
179 0 not a transact2, or all data present
180 >0 transact2 with that much data missing
181 -EINVAL = invalid transact2
182
183 */
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000184static int check2ndT2(struct smb_hdr *pSMB, unsigned int maxBufSize)
Steve Frenche4eb2952005-04-28 22:41:09 -0700185{
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000186 struct smb_t2_rsp *pSMBt;
Steve Frenche4eb2952005-04-28 22:41:09 -0700187 int remaining;
Jeff Layton26ec2542011-01-20 13:36:51 -0500188 __u16 total_data_size, data_in_this_rsp;
Steve Frenche4eb2952005-04-28 22:41:09 -0700189
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000190 if (pSMB->Command != SMB_COM_TRANSACTION2)
Steve Frenche4eb2952005-04-28 22:41:09 -0700191 return 0;
192
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000193 /* check for plausible wct, bcc and t2 data and parm sizes */
194 /* check for parm and data offset going beyond end of smb */
195 if (pSMB->WordCount != 10) { /* coalesce_t2 depends on this */
Joe Perchesb6b38f72010-04-21 03:50:45 +0000196 cFYI(1, "invalid transact2 word count");
Steve Frenche4eb2952005-04-28 22:41:09 -0700197 return -EINVAL;
198 }
199
200 pSMBt = (struct smb_t2_rsp *)pSMB;
201
Jeff Layton26ec2542011-01-20 13:36:51 -0500202 total_data_size = get_unaligned_le16(&pSMBt->t2_rsp.TotalDataCount);
203 data_in_this_rsp = get_unaligned_le16(&pSMBt->t2_rsp.DataCount);
Steve Frenche4eb2952005-04-28 22:41:09 -0700204
Jeff Laytonc0c7b902011-03-31 17:32:54 -0400205 if (total_data_size == data_in_this_rsp)
Steve Frenche4eb2952005-04-28 22:41:09 -0700206 return 0;
Jeff Laytonc0c7b902011-03-31 17:32:54 -0400207 else if (total_data_size < data_in_this_rsp) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000208 cFYI(1, "total data %d smaller than data in frame %d",
209 total_data_size, data_in_this_rsp);
Steve Frenche4eb2952005-04-28 22:41:09 -0700210 return -EINVAL;
Steve Frenche4eb2952005-04-28 22:41:09 -0700211 }
Jeff Laytonc0c7b902011-03-31 17:32:54 -0400212
213 remaining = total_data_size - data_in_this_rsp;
214
215 cFYI(1, "missing %d bytes from transact2, check next response",
216 remaining);
217 if (total_data_size > maxBufSize) {
218 cERROR(1, "TotalDataSize %d is over maximum buffer %d",
219 total_data_size, maxBufSize);
220 return -EINVAL;
221 }
222 return remaining;
Steve Frenche4eb2952005-04-28 22:41:09 -0700223}
224
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000225static int coalesce_t2(struct smb_hdr *psecond, struct smb_hdr *pTargetSMB)
Steve Frenche4eb2952005-04-28 22:41:09 -0700226{
227 struct smb_t2_rsp *pSMB2 = (struct smb_t2_rsp *)psecond;
228 struct smb_t2_rsp *pSMBt = (struct smb_t2_rsp *)pTargetSMB;
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000229 char *data_area_of_target;
230 char *data_area_of_buf2;
Jeff Layton26ec2542011-01-20 13:36:51 -0500231 int remaining;
Jeff Layton2a2047bc2011-04-27 13:29:49 -0400232 unsigned int byte_count, total_in_buf;
233 __u16 total_data_size, total_in_buf2;
Steve Frenche4eb2952005-04-28 22:41:09 -0700234
Jeff Layton26ec2542011-01-20 13:36:51 -0500235 total_data_size = get_unaligned_le16(&pSMBt->t2_rsp.TotalDataCount);
Steve Frenche4eb2952005-04-28 22:41:09 -0700236
Jeff Layton26ec2542011-01-20 13:36:51 -0500237 if (total_data_size !=
238 get_unaligned_le16(&pSMB2->t2_rsp.TotalDataCount))
Joe Perchesb6b38f72010-04-21 03:50:45 +0000239 cFYI(1, "total data size of primary and secondary t2 differ");
Steve Frenche4eb2952005-04-28 22:41:09 -0700240
Jeff Layton26ec2542011-01-20 13:36:51 -0500241 total_in_buf = get_unaligned_le16(&pSMBt->t2_rsp.DataCount);
Steve Frenche4eb2952005-04-28 22:41:09 -0700242
243 remaining = total_data_size - total_in_buf;
Steve French50c2f752007-07-13 00:33:32 +0000244
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000245 if (remaining < 0)
Jeff Layton2a2047bc2011-04-27 13:29:49 -0400246 return -EPROTO;
Steve Frenche4eb2952005-04-28 22:41:09 -0700247
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000248 if (remaining == 0) /* nothing to do, ignore */
Steve Frenche4eb2952005-04-28 22:41:09 -0700249 return 0;
Steve French50c2f752007-07-13 00:33:32 +0000250
Jeff Layton26ec2542011-01-20 13:36:51 -0500251 total_in_buf2 = get_unaligned_le16(&pSMB2->t2_rsp.DataCount);
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000252 if (remaining < total_in_buf2) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000253 cFYI(1, "transact2 2nd response contains too much data");
Steve Frenche4eb2952005-04-28 22:41:09 -0700254 }
255
256 /* find end of first SMB data area */
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000257 data_area_of_target = (char *)&pSMBt->hdr.Protocol +
Jeff Layton26ec2542011-01-20 13:36:51 -0500258 get_unaligned_le16(&pSMBt->t2_rsp.DataOffset);
Steve Frenche4eb2952005-04-28 22:41:09 -0700259 /* validate target area */
260
Jeff Layton26ec2542011-01-20 13:36:51 -0500261 data_area_of_buf2 = (char *)&pSMB2->hdr.Protocol +
262 get_unaligned_le16(&pSMB2->t2_rsp.DataOffset);
Steve Frenche4eb2952005-04-28 22:41:09 -0700263
264 data_area_of_target += total_in_buf;
265
266 /* copy second buffer into end of first buffer */
Steve Frenche4eb2952005-04-28 22:41:09 -0700267 total_in_buf += total_in_buf2;
Jeff Layton2a2047bc2011-04-27 13:29:49 -0400268 /* is the result too big for the field? */
269 if (total_in_buf > USHRT_MAX)
270 return -EPROTO;
Jeff Layton26ec2542011-01-20 13:36:51 -0500271 put_unaligned_le16(total_in_buf, &pSMBt->t2_rsp.DataCount);
Jeff Layton2a2047bc2011-04-27 13:29:49 -0400272
273 /* fix up the BCC */
Jeff Layton820a8032011-05-04 08:05:26 -0400274 byte_count = get_bcc(pTargetSMB);
Steve Frenche4eb2952005-04-28 22:41:09 -0700275 byte_count += total_in_buf2;
Jeff Layton2a2047bc2011-04-27 13:29:49 -0400276 /* is the result too big for the field? */
277 if (byte_count > USHRT_MAX)
278 return -EPROTO;
Jeff Layton820a8032011-05-04 08:05:26 -0400279 put_bcc(byte_count, pTargetSMB);
Steve Frenche4eb2952005-04-28 22:41:09 -0700280
Steve Frenchbe8e3b02011-04-29 05:40:20 +0000281 byte_count = be32_to_cpu(pTargetSMB->smb_buf_length);
Steve Frenche4eb2952005-04-28 22:41:09 -0700282 byte_count += total_in_buf2;
Jeff Layton2a2047bc2011-04-27 13:29:49 -0400283 /* don't allow buffer to overflow */
284 if (byte_count > CIFSMaxBufSize)
285 return -ENOBUFS;
Steve Frenchbe8e3b02011-04-29 05:40:20 +0000286 pTargetSMB->smb_buf_length = cpu_to_be32(byte_count);
Steve Frenche4eb2952005-04-28 22:41:09 -0700287
Jeff Layton2a2047bc2011-04-27 13:29:49 -0400288 memcpy(data_area_of_target, data_area_of_buf2, total_in_buf2);
289
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000290 if (remaining == total_in_buf2) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000291 cFYI(1, "found the last secondary response");
Steve Frenche4eb2952005-04-28 22:41:09 -0700292 return 0; /* we are done */
293 } else /* more responses to go */
294 return 1;
Steve Frenche4eb2952005-04-28 22:41:09 -0700295}
296
Jeff Laytonc74093b2011-01-11 07:24:23 -0500297static void
298cifs_echo_request(struct work_struct *work)
299{
300 int rc;
301 struct TCP_Server_Info *server = container_of(work,
302 struct TCP_Server_Info, echo.work);
303
Jeff Layton247ec9b2011-02-04 17:09:50 -0500304 /*
Jeff Layton195291e2011-02-09 12:01:42 -0500305 * We cannot send an echo until the NEGOTIATE_PROTOCOL request is
306 * done, which is indicated by maxBuf != 0. Also, no need to ping if
307 * we got a response recently
Jeff Layton247ec9b2011-02-04 17:09:50 -0500308 */
Jeff Layton195291e2011-02-09 12:01:42 -0500309 if (server->maxBuf == 0 ||
Jeff Layton247ec9b2011-02-04 17:09:50 -0500310 time_before(jiffies, server->lstrp + SMB_ECHO_INTERVAL - HZ))
Jeff Laytonc74093b2011-01-11 07:24:23 -0500311 goto requeue_echo;
312
313 rc = CIFSSMBEcho(server);
314 if (rc)
315 cFYI(1, "Unable to send echo request to server: %s",
316 server->hostname);
317
318requeue_echo:
319 queue_delayed_work(system_nrt_wq, &server->echo, SMB_ECHO_INTERVAL);
320}
321
Pavel Shilovsky3d9c2472011-08-01 13:19:40 +0400322static bool
323allocate_buffers(char **bigbuf, char **smallbuf, unsigned int size,
324 bool is_large_buf)
325{
326 char *bbuf = *bigbuf, *sbuf = *smallbuf;
327
328 if (bbuf == NULL) {
329 bbuf = (char *)cifs_buf_get();
330 if (!bbuf) {
331 cERROR(1, "No memory for large SMB response");
332 msleep(3000);
333 /* retry will check if exiting */
334 return false;
335 }
336 } else if (is_large_buf) {
337 /* we are reusing a dirty large buf, clear its start */
338 memset(bbuf, 0, size);
339 }
340
341 if (sbuf == NULL) {
342 sbuf = (char *)cifs_small_buf_get();
343 if (!sbuf) {
344 cERROR(1, "No memory for SMB response");
345 msleep(1000);
346 /* retry will check if exiting */
347 return false;
348 }
349 /* beginning of smb buffer is cleared in our buf_get */
350 } else {
351 /* if existing small buf clear beginning */
352 memset(sbuf, 0, size);
353 }
354
355 *bigbuf = bbuf;
356 *smallbuf = sbuf;
357
358 return true;
359}
360
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361static int
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400362read_from_socket(struct TCP_Server_Info *server, struct msghdr *smb_msg,
363 struct kvec *iov, unsigned int to_read,
364 unsigned int *ptotal_read, bool is_header_read)
365{
366 int length, rc = 0;
367 unsigned int total_read;
368 char *buf = iov->iov_base;
369
370 for (total_read = 0; total_read < to_read; total_read += length) {
371 length = kernel_recvmsg(server->ssocket, smb_msg, iov, 1,
372 to_read - total_read, 0);
373 if (server->tcpStatus == CifsExiting) {
374 /* then will exit */
375 rc = 2;
376 break;
377 } else if (server->tcpStatus == CifsNeedReconnect) {
378 cifs_reconnect(server);
379 /* Reconnect wakes up rspns q */
380 /* Now we will reread sock */
381 rc = 1;
382 break;
383 } else if (length == -ERESTARTSYS ||
384 length == -EAGAIN ||
385 length == -EINTR) {
386 /*
387 * Minimum sleep to prevent looping, allowing socket
388 * to clear and app threads to set tcpStatus
389 * CifsNeedReconnect if server hung.
390 */
391 usleep_range(1000, 2000);
392 length = 0;
393 if (!is_header_read)
394 continue;
395 /* Special handling for header read */
396 if (total_read) {
397 iov->iov_base = (to_read - total_read) +
398 buf;
399 iov->iov_len = to_read - total_read;
400 smb_msg->msg_control = NULL;
401 smb_msg->msg_controllen = 0;
402 rc = 3;
403 } else
404 rc = 1;
405 break;
406 } else if (length <= 0) {
407 cERROR(1, "Received no data, expecting %d",
408 to_read - total_read);
409 cifs_reconnect(server);
410 rc = 1;
411 break;
412 }
413 }
414
415 *ptotal_read = total_read;
416 return rc;
417}
418
Pavel Shilovsky98bac622011-08-01 13:19:42 +0400419static bool
420check_rfc1002_header(struct TCP_Server_Info *server, char *buf)
421{
422 char temp = *buf;
423 unsigned int pdu_length = be32_to_cpu(
424 ((struct smb_hdr *)buf)->smb_buf_length);
425
426 /*
427 * The first byte big endian of the length field,
428 * is actually not part of the length but the type
429 * with the most common, zero, as regular data.
430 */
431 if (temp == (char) RFC1002_SESSION_KEEP_ALIVE) {
432 return false;
433 } else if (temp == (char)RFC1002_POSITIVE_SESSION_RESPONSE) {
434 cFYI(1, "Good RFC 1002 session rsp");
435 return false;
436 } else if (temp == (char)RFC1002_NEGATIVE_SESSION_RESPONSE) {
437 /*
438 * We get this from Windows 98 instead of an error on
439 * SMB negprot response.
440 */
441 cFYI(1, "Negative RFC1002 Session Response Error 0x%x)",
442 pdu_length);
443 /* give server a second to clean up */
444 msleep(1000);
445 /*
446 * Always try 445 first on reconnect since we get NACK
447 * on some if we ever connected to port 139 (the NACK
448 * is since we do not begin with RFC1001 session
449 * initialize frame).
450 */
451 cifs_set_port((struct sockaddr *)
452 &server->dstaddr, CIFS_PORT);
453 cifs_reconnect(server);
454 wake_up(&server->response_q);
455 return false;
456 } else if (temp != (char) 0) {
457 cERROR(1, "Unknown RFC 1002 frame");
458 cifs_dump_mem(" Received Data: ", buf, 4);
459 cifs_reconnect(server);
460 return false;
461 }
462
463 /* else we have an SMB response */
464 if ((pdu_length > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) ||
465 (pdu_length < sizeof(struct smb_hdr) - 1 - 4)) {
466 cERROR(1, "Invalid size SMB length %d pdu_length %d",
467 4, pdu_length+4);
468 cifs_reconnect(server);
469 wake_up(&server->response_q);
470 return false;
471 }
472
473 return true;
474}
475
Pavel Shilovskyad69bae2011-08-01 13:19:43 +0400476static struct mid_q_entry *
477find_cifs_mid(struct TCP_Server_Info *server, struct smb_hdr *buf,
478 int *length, bool is_large_buf, bool *is_multi_rsp, char **bigbuf)
479{
480 struct mid_q_entry *mid = NULL, *tmp_mid, *ret = NULL;
481
482 spin_lock(&GlobalMid_Lock);
483 list_for_each_entry_safe(mid, tmp_mid, &server->pending_mid_q, qhead) {
484 if (mid->mid != buf->Mid ||
485 mid->midState != MID_REQUEST_SUBMITTED ||
486 mid->command != buf->Command)
487 continue;
488
489 if (*length == 0 && check2ndT2(buf, server->maxBuf) > 0) {
490 /* We have a multipart transact2 resp */
491 *is_multi_rsp = true;
492 if (mid->resp_buf) {
493 /* merge response - fix up 1st*/
494 *length = coalesce_t2(buf, mid->resp_buf);
495 if (*length > 0) {
496 *length = 0;
497 mid->multiRsp = true;
498 break;
499 }
500 /* All parts received or packet is malformed. */
501 mid->multiEnd = true;
502 goto multi_t2_fnd;
503 }
504 if (!is_large_buf) {
505 /*FIXME: switch to already allocated largebuf?*/
506 cERROR(1, "1st trans2 resp needs bigbuf");
507 } else {
508 /* Have first buffer */
509 mid->resp_buf = buf;
510 mid->largeBuf = true;
511 *bigbuf = NULL;
512 }
513 break;
514 }
515 mid->resp_buf = buf;
516 mid->largeBuf = is_large_buf;
517multi_t2_fnd:
518 if (*length == 0)
519 mid->midState = MID_RESPONSE_RECEIVED;
520 else
521 mid->midState = MID_RESPONSE_MALFORMED;
522#ifdef CONFIG_CIFS_STATS2
523 mid->when_received = jiffies;
524#endif
525 list_del_init(&mid->qhead);
526 ret = mid;
527 break;
528 }
529 spin_unlock(&GlobalMid_Lock);
530
531 return ret;
532}
533
Pavel Shilovsky762dfd12011-08-01 13:19:44 +0400534static void clean_demultiplex_info(struct TCP_Server_Info *server)
535{
536 int length;
537
538 /* take it off the list, if it's not already */
539 spin_lock(&cifs_tcp_ses_lock);
540 list_del_init(&server->tcp_ses_list);
541 spin_unlock(&cifs_tcp_ses_lock);
542
543 spin_lock(&GlobalMid_Lock);
544 server->tcpStatus = CifsExiting;
545 spin_unlock(&GlobalMid_Lock);
546 wake_up_all(&server->response_q);
547
548 /*
549 * Check if we have blocked requests that need to free. Note that
550 * cifs_max_pending is normally 50, but can be set at module install
551 * time to as little as two.
552 */
553 spin_lock(&GlobalMid_Lock);
554 if (atomic_read(&server->inFlight) >= cifs_max_pending)
555 atomic_set(&server->inFlight, cifs_max_pending - 1);
556 /*
557 * We do not want to set the max_pending too low or we could end up
558 * with the counter going negative.
559 */
560 spin_unlock(&GlobalMid_Lock);
561 /*
562 * Although there should not be any requests blocked on this queue it
563 * can not hurt to be paranoid and try to wake up requests that may
564 * haven been blocked when more than 50 at time were on the wire to the
565 * same server - they now will see the session is in exit state and get
566 * out of SendReceive.
567 */
568 wake_up_all(&server->request_q);
569 /* give those requests time to exit */
570 msleep(125);
571
572 if (server->ssocket) {
573 sock_release(server->ssocket);
574 server->ssocket = NULL;
575 }
576
577 if (!list_empty(&server->pending_mid_q)) {
578 struct list_head dispose_list;
579 struct mid_q_entry *mid_entry;
580 struct list_head *tmp, *tmp2;
581
582 INIT_LIST_HEAD(&dispose_list);
583 spin_lock(&GlobalMid_Lock);
584 list_for_each_safe(tmp, tmp2, &server->pending_mid_q) {
585 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
586 cFYI(1, "Clearing mid 0x%x", mid_entry->mid);
587 mid_entry->midState = MID_SHUTDOWN;
588 list_move(&mid_entry->qhead, &dispose_list);
589 }
590 spin_unlock(&GlobalMid_Lock);
591
592 /* now walk dispose list and issue callbacks */
593 list_for_each_safe(tmp, tmp2, &dispose_list) {
594 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
595 cFYI(1, "Callback mid 0x%x", mid_entry->mid);
596 list_del_init(&mid_entry->qhead);
597 mid_entry->callback(mid_entry);
598 }
599 /* 1/8th of sec is more than enough time for them to exit */
600 msleep(125);
601 }
602
603 if (!list_empty(&server->pending_mid_q)) {
604 /*
605 * mpx threads have not exited yet give them at least the smb
606 * send timeout time for long ops.
607 *
608 * Due to delays on oplock break requests, we need to wait at
609 * least 45 seconds before giving up on a request getting a
610 * response and going ahead and killing cifsd.
611 */
612 cFYI(1, "Wait for exit from demultiplex thread");
613 msleep(46000);
614 /*
615 * If threads still have not exited they are probably never
616 * coming home not much else we can do but free the memory.
617 */
618 }
619
620 kfree(server->hostname);
621 kfree(server);
622
623 length = atomic_dec_return(&tcpSesAllocCount);
624 if (length > 0)
625 mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
626 GFP_KERNEL);
627}
628
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400629static int
Al Viro7c97c202011-06-21 08:51:28 -0400630cifs_demultiplex_thread(void *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700631{
632 int length;
Al Viro7c97c202011-06-21 08:51:28 -0400633 struct TCP_Server_Info *server = p;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700634 unsigned int pdu_length, total_read;
Pavel Shilovsky3d9c2472011-08-01 13:19:40 +0400635 char *buf = NULL, *bigbuf = NULL, *smallbuf = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700636 struct smb_hdr *smb_buffer = NULL;
637 struct msghdr smb_msg;
638 struct kvec iov;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700639 struct task_struct *task_to_wake = NULL;
640 struct mid_q_entry *mid_entry;
Steve French4b18f2a2008-04-29 00:06:05 +0000641 bool isLargeBuf = false;
Pavel Shilovskyad69bae2011-08-01 13:19:43 +0400642 bool isMultiRsp = false;
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400643 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700644
Linus Torvalds1da177e2005-04-16 15:20:36 -0700645 current->flags |= PF_MEMALLOC;
Joe Perchesb6b38f72010-04-21 03:50:45 +0000646 cFYI(1, "Demultiplex PID: %d", task_pid_nr(current));
Jeff Layton93d0ec82008-08-02 08:00:48 -0400647
648 length = atomic_inc_return(&tcpSesAllocCount);
649 if (length > 1)
Steve French26f57362007-08-30 22:09:15 +0000650 mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
651 GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700652
Rafael J. Wysocki83144182007-07-17 04:03:35 -0700653 set_freezable();
Jeff Layton469ee612008-10-16 18:46:39 +0000654 while (server->tcpStatus != CifsExiting) {
Steve Frenchede13272005-08-30 20:10:14 -0700655 if (try_to_freeze())
656 continue;
Steve Frenchb8643e12005-04-28 22:41:07 -0700657
Pavel Shilovsky3d9c2472011-08-01 13:19:40 +0400658 if (!allocate_buffers(&bigbuf, &smallbuf,
659 sizeof(struct smb_hdr), isLargeBuf))
660 continue;
Steve Frenchb8643e12005-04-28 22:41:07 -0700661
Steve French4b18f2a2008-04-29 00:06:05 +0000662 isLargeBuf = false;
663 isMultiRsp = false;
Pavel Shilovsky3d9c2472011-08-01 13:19:40 +0400664 smb_buffer = (struct smb_hdr *)smallbuf;
665 buf = smallbuf;
666 iov.iov_base = buf;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700667 iov.iov_len = 4;
668 smb_msg.msg_control = NULL;
669 smb_msg.msg_controllen = 0;
Steve Frenchf01d5e12007-08-30 21:13:31 +0000670 pdu_length = 4; /* enough to get RFC1001 header */
Steve Frenchfda35942011-01-20 18:06:34 +0000671
Steve Frenchf01d5e12007-08-30 21:13:31 +0000672incomplete_rcv:
Steve Frenchfd88ce92011-04-12 01:01:14 +0000673 if (echo_retries > 0 && server->tcpStatus == CifsGood &&
Steve Frenchfda35942011-01-20 18:06:34 +0000674 time_after(jiffies, server->lstrp +
675 (echo_retries * SMB_ECHO_INTERVAL))) {
676 cERROR(1, "Server %s has not responded in %d seconds. "
677 "Reconnecting...", server->hostname,
678 (echo_retries * SMB_ECHO_INTERVAL / HZ));
679 cifs_reconnect(server);
Steve Frenchfda35942011-01-20 18:06:34 +0000680 wake_up(&server->response_q);
681 continue;
682 }
683
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400684 rc = read_from_socket(server, &smb_msg, &iov, pdu_length,
685 &total_read, true /* header read */);
686 if (rc == 3)
Steve Frenchf01d5e12007-08-30 21:13:31 +0000687 goto incomplete_rcv;
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400688 else if (rc == 2)
689 break;
690 else if (rc == 1)
691 continue;
Steve French67010fb2005-04-28 22:41:09 -0700692
Pavel Shilovsky98bac622011-08-01 13:19:42 +0400693 /*
694 * The right amount was read from socket - 4 bytes,
695 * so we can now interpret the length field.
696 */
Steve French46810cb2005-04-28 22:41:09 -0700697
Pavel Shilovsky98bac622011-08-01 13:19:42 +0400698 /*
699 * Note that RFC 1001 length is big endian on the wire,
700 * but we convert it here so it is always manipulated
701 * as host byte order.
702 */
Steve Frenchbe8e3b02011-04-29 05:40:20 +0000703 pdu_length = be32_to_cpu(smb_buffer->smb_buf_length);
Steve French46810cb2005-04-28 22:41:09 -0700704
Joe Perchesb6b38f72010-04-21 03:50:45 +0000705 cFYI(1, "rfc1002 length 0x%x", pdu_length+4);
Pavel Shilovsky98bac622011-08-01 13:19:42 +0400706 if (!check_rfc1002_header(server, buf))
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000707 continue;
Steve Frenche4eb2952005-04-28 22:41:09 -0700708
709 /* else length ok */
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000710 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) {
Steve French4b18f2a2008-04-29 00:06:05 +0000711 isLargeBuf = true;
Steve Frenche4eb2952005-04-28 22:41:09 -0700712 memcpy(bigbuf, smallbuf, 4);
Pavel Shilovsky3d9c2472011-08-01 13:19:40 +0400713 smb_buffer = (struct smb_hdr *)bigbuf;
714 buf = bigbuf;
Steve Frenche4eb2952005-04-28 22:41:09 -0700715 }
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400716
Pavel Shilovsky3d9c2472011-08-01 13:19:40 +0400717 iov.iov_base = 4 + buf;
Steve Frenche4eb2952005-04-28 22:41:09 -0700718 iov.iov_len = pdu_length;
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400719 rc = read_from_socket(server, &smb_msg, &iov, pdu_length,
720 &total_read, false);
721 if (rc == 2)
Steve Frenche4eb2952005-04-28 22:41:09 -0700722 break;
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400723 else if (rc == 1)
Steve Frenche4eb2952005-04-28 22:41:09 -0700724 continue;
725
Jeff Layton9587fcf2011-02-01 08:40:43 -0500726 total_read += 4; /* account for rfc1002 hdr */
Steve French50c2f752007-07-13 00:33:32 +0000727
Jeff Layton9587fcf2011-02-01 08:40:43 -0500728 dump_smb(smb_buffer, total_read);
Jeff Layton71823ba2011-02-10 08:03:50 -0500729
730 /*
731 * We know that we received enough to get to the MID as we
732 * checked the pdu_length earlier. Now check to see
733 * if the rest of the header is OK. We borrow the length
734 * var for the rest of the loop to avoid a new stack var.
735 *
736 * 48 bytes is enough to display the header and a little bit
737 * into the payload for debugging purposes.
738 */
739 length = checkSMB(smb_buffer, smb_buffer->Mid, total_read);
740 if (length != 0)
Pavel Shilovsky3d9c2472011-08-01 13:19:40 +0400741 cifs_dump_mem("Bad SMB: ", buf,
742 min_t(unsigned int, total_read, 48));
Steve Frenche4eb2952005-04-28 22:41:09 -0700743
Steve Frenchfda35942011-01-20 18:06:34 +0000744 server->lstrp = jiffies;
745
Pavel Shilovskyad69bae2011-08-01 13:19:43 +0400746 mid_entry = find_cifs_mid(server, smb_buffer, &length,
747 isLargeBuf, &isMultiRsp, &bigbuf);
Jeff Layton2b84a36c2011-01-11 07:24:21 -0500748 if (mid_entry != NULL) {
Jeff Layton3c1105d2011-05-22 07:09:13 -0400749 mid_entry->callback(mid_entry);
Steve Frenchcd634992005-04-28 22:41:10 -0700750 /* Was previous buf put in mpx struct for multi-rsp? */
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000751 if (!isMultiRsp) {
Steve Frenchcd634992005-04-28 22:41:10 -0700752 /* smb buffer will be freed by user thread */
Steve French26f57362007-08-30 22:09:15 +0000753 if (isLargeBuf)
Steve Frenchcd634992005-04-28 22:41:10 -0700754 bigbuf = NULL;
Steve French26f57362007-08-30 22:09:15 +0000755 else
Steve Frenchcd634992005-04-28 22:41:10 -0700756 smallbuf = NULL;
757 }
Jeff Layton71823ba2011-02-10 08:03:50 -0500758 } else if (length != 0) {
759 /* response sanity checks failed */
760 continue;
Steve French4b18f2a2008-04-29 00:06:05 +0000761 } else if (!is_valid_oplock_break(smb_buffer, server) &&
762 !isMultiRsp) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000763 cERROR(1, "No task to wake, unknown frame received! "
Jeff Layton80975312011-01-11 07:24:02 -0500764 "NumMids %d", atomic_read(&midCount));
Pavel Shilovsky3d9c2472011-08-01 13:19:40 +0400765 cifs_dump_mem("Received Data is: ", buf,
Steve French70ca7342005-09-22 16:32:06 -0700766 sizeof(struct smb_hdr));
Steve French39798772006-05-31 22:40:51 +0000767#ifdef CONFIG_CIFS_DEBUG2
768 cifs_dump_detail(smb_buffer);
769 cifs_dump_mids(server);
770#endif /* CIFS_DEBUG2 */
Steve French50c2f752007-07-13 00:33:32 +0000771
Steve Frenche4eb2952005-04-28 22:41:09 -0700772 }
773 } /* end while !EXITING */
774
Justin P. Mattockfd62cb72011-02-24 22:15:02 -0800775 /* buffer usually freed in free_mid - need to free it here on exit */
Mariusz Kozlowskia8a11d32007-10-03 16:41:24 +0000776 cifs_buf_release(bigbuf);
777 if (smallbuf) /* no sense logging a debug message if NULL */
Steve Frenchb8643e12005-04-28 22:41:07 -0700778 cifs_small_buf_release(smallbuf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700779
Jeff Laytonb1c8d2b2008-10-22 13:57:07 -0400780 task_to_wake = xchg(&server->tsk, NULL);
Pavel Shilovsky762dfd12011-08-01 13:19:44 +0400781 clean_demultiplex_info(server);
Steve French50c2f752007-07-13 00:33:32 +0000782
Jeff Laytonb1c8d2b2008-10-22 13:57:07 -0400783 /* if server->tsk was NULL then wait for a signal before exiting */
784 if (!task_to_wake) {
785 set_current_state(TASK_INTERRUPTIBLE);
786 while (!signal_pending(current)) {
787 schedule();
788 set_current_state(TASK_INTERRUPTIBLE);
789 }
790 set_current_state(TASK_RUNNING);
791 }
792
Jeff Layton0468a2c2008-12-01 07:09:35 -0500793 module_put_and_exit(0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700794}
795
Jeff Laytonc359cf32007-11-16 22:22:06 +0000796/* extract the host portion of the UNC string */
797static char *
798extract_hostname(const char *unc)
799{
800 const char *src;
801 char *dst, *delim;
802 unsigned int len;
803
804 /* skip double chars at beginning of string */
805 /* BB: check validity of these bytes? */
806 src = unc + 2;
807
808 /* delimiter between hostname and sharename is always '\\' now */
809 delim = strchr(src, '\\');
810 if (!delim)
811 return ERR_PTR(-EINVAL);
812
813 len = delim - src;
814 dst = kmalloc((len + 1), GFP_KERNEL);
815 if (dst == NULL)
816 return ERR_PTR(-ENOMEM);
817
818 memcpy(dst, src, len);
819 dst[len] = '\0';
820
821 return dst;
822}
823
Linus Torvalds1da177e2005-04-16 15:20:36 -0700824static int
Sean Finneyb9468452011-04-11 13:19:32 +0000825cifs_parse_mount_options(const char *mountdata, const char *devname,
Steve French50c2f752007-07-13 00:33:32 +0000826 struct smb_vol *vol)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700827{
Pavel Shilovsky4906e502011-04-14 22:00:56 +0400828 char *value, *data, *end;
Vasily Averin957df452011-06-06 11:33:12 +0400829 char *mountdata_copy = NULL, *options;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700830 unsigned int temp_len, i, j;
831 char separator[2];
Jeff Layton9b9d6b242009-07-31 06:56:09 -0400832 short int override_uid = -1;
833 short int override_gid = -1;
834 bool uid_specified = false;
835 bool gid_specified = false;
Jeff Layton88463992010-11-22 15:31:03 -0500836 char *nodename = utsname()->nodename;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700837
838 separator[0] = ',';
Steve French50c2f752007-07-13 00:33:32 +0000839 separator[1] = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700840
Jeff Layton88463992010-11-22 15:31:03 -0500841 /*
842 * does not have to be perfect mapping since field is
843 * informational, only used for servers that do not support
844 * port 445 and it can be overridden at mount time
845 */
Jeff Layton1397f2e2011-01-07 11:30:28 -0500846 memset(vol->source_rfc1001_name, 0x20, RFC1001_NAME_LEN);
847 for (i = 0; i < strnlen(nodename, RFC1001_NAME_LEN); i++)
Jeff Layton88463992010-11-22 15:31:03 -0500848 vol->source_rfc1001_name[i] = toupper(nodename[i]);
849
Jeff Layton1397f2e2011-01-07 11:30:28 -0500850 vol->source_rfc1001_name[RFC1001_NAME_LEN] = 0;
Steve Frencha10faeb22005-08-22 21:38:31 -0700851 /* null target name indicates to use *SMBSERVR default called name
852 if we end up sending RFC1001 session initialize */
853 vol->target_rfc1001_name[0] = 0;
Jeff Layton3e4b3e12010-07-19 18:00:17 -0400854 vol->cred_uid = current_uid();
855 vol->linux_uid = current_uid();
David Howellsa001e5b2008-11-14 10:38:47 +1100856 vol->linux_gid = current_gid();
Jeff Laytonf55ed1a2009-05-26 16:28:11 -0400857
858 /* default to only allowing write access to owner of the mount */
859 vol->dir_mode = vol->file_mode = S_IRUGO | S_IXUGO | S_IWUSR;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700860
861 /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */
Jeremy Allisonac670552005-06-22 17:26:35 -0700862 /* default is always to request posix paths. */
863 vol->posix_paths = 1;
Jeff Laytona0c92172009-05-27 15:40:47 -0400864 /* default to using server inode numbers where available */
865 vol->server_ino = 1;
Jeremy Allisonac670552005-06-22 17:26:35 -0700866
Suresh Jayaraman6d20e842010-12-01 14:42:28 +0530867 vol->actimeo = CIFS_DEF_ACTIMEO;
868
Sean Finneyb9468452011-04-11 13:19:32 +0000869 if (!mountdata)
870 goto cifs_parse_mount_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700871
Sean Finneyb9468452011-04-11 13:19:32 +0000872 mountdata_copy = kstrndup(mountdata, PAGE_SIZE, GFP_KERNEL);
873 if (!mountdata_copy)
874 goto cifs_parse_mount_err;
875
876 options = mountdata_copy;
Pavel Shilovsky4906e502011-04-14 22:00:56 +0400877 end = options + strlen(options);
Steve French50c2f752007-07-13 00:33:32 +0000878 if (strncmp(options, "sep=", 4) == 0) {
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000879 if (options[4] != 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700880 separator[0] = options[4];
881 options += 5;
882 } else {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000883 cFYI(1, "Null separator not allowed");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700884 }
885 }
Steve French50c2f752007-07-13 00:33:32 +0000886
Linus Torvalds1da177e2005-04-16 15:20:36 -0700887 while ((data = strsep(&options, separator)) != NULL) {
888 if (!*data)
889 continue;
890 if ((value = strchr(data, '=')) != NULL)
891 *value++ = '\0';
892
Steve French50c2f752007-07-13 00:33:32 +0000893 /* Have to parse this before we parse for "user" */
894 if (strnicmp(data, "user_xattr", 10) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700895 vol->no_xattr = 0;
Steve French50c2f752007-07-13 00:33:32 +0000896 } else if (strnicmp(data, "nouser_xattr", 12) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700897 vol->no_xattr = 1;
898 } else if (strnicmp(data, "user", 4) == 0) {
Steve French4b952a92006-10-30 21:46:13 +0000899 if (!value) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700900 printk(KERN_WARNING
901 "CIFS: invalid or missing username\n");
Sean Finneyb9468452011-04-11 13:19:32 +0000902 goto cifs_parse_mount_err;
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000903 } else if (!*value) {
Steve French4b952a92006-10-30 21:46:13 +0000904 /* null user, ie anonymous, authentication */
905 vol->nullauth = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700906 }
Steve French8727c8a2011-02-25 01:11:56 -0600907 if (strnlen(value, MAX_USERNAME_SIZE) <
908 MAX_USERNAME_SIZE) {
Sean Finneyb9468452011-04-11 13:19:32 +0000909 vol->username = kstrdup(value, GFP_KERNEL);
910 if (!vol->username) {
911 printk(KERN_WARNING "CIFS: no memory "
912 "for username\n");
913 goto cifs_parse_mount_err;
914 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700915 } else {
916 printk(KERN_WARNING "CIFS: username too long\n");
Sean Finneyb9468452011-04-11 13:19:32 +0000917 goto cifs_parse_mount_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700918 }
919 } else if (strnicmp(data, "pass", 4) == 0) {
920 if (!value) {
921 vol->password = NULL;
922 continue;
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000923 } else if (value[0] == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700924 /* check if string begins with double comma
925 since that would mean the password really
926 does start with a comma, and would not
927 indicate an empty string */
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000928 if (value[1] != separator[0]) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700929 vol->password = NULL;
930 continue;
931 }
932 }
933 temp_len = strlen(value);
934 /* removed password length check, NTLM passwords
935 can be arbitrarily long */
936
Steve French50c2f752007-07-13 00:33:32 +0000937 /* if comma in password, the string will be
Linus Torvalds1da177e2005-04-16 15:20:36 -0700938 prematurely null terminated. Commas in password are
939 specified across the cifs mount interface by a double
940 comma ie ,, and a comma used as in other cases ie ','
941 as a parameter delimiter/separator is single and due
942 to the strsep above is temporarily zeroed. */
943
944 /* NB: password legally can have multiple commas and
945 the only illegal character in a password is null */
946
Steve French50c2f752007-07-13 00:33:32 +0000947 if ((value[temp_len] == 0) &&
Pavel Shilovsky4906e502011-04-14 22:00:56 +0400948 (value + temp_len < end) &&
Steve French09d1db52005-04-28 22:41:08 -0700949 (value[temp_len+1] == separator[0])) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700950 /* reinsert comma */
951 value[temp_len] = separator[0];
Steve French50c2f752007-07-13 00:33:32 +0000952 temp_len += 2; /* move after second comma */
953 while (value[temp_len] != 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700954 if (value[temp_len] == separator[0]) {
Steve French50c2f752007-07-13 00:33:32 +0000955 if (value[temp_len+1] ==
Steve French09d1db52005-04-28 22:41:08 -0700956 separator[0]) {
957 /* skip second comma */
958 temp_len++;
Steve French50c2f752007-07-13 00:33:32 +0000959 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700960 /* single comma indicating start
961 of next parm */
962 break;
963 }
964 }
965 temp_len++;
966 }
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000967 if (value[temp_len] == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700968 options = NULL;
969 } else {
970 value[temp_len] = 0;
971 /* point option to start of next parm */
972 options = value + temp_len + 1;
973 }
Steve French50c2f752007-07-13 00:33:32 +0000974 /* go from value to value + temp_len condensing
Linus Torvalds1da177e2005-04-16 15:20:36 -0700975 double commas to singles. Note that this ends up
976 allocating a few bytes too many, which is ok */
Pekka Enberge915fc42005-09-06 15:18:35 -0700977 vol->password = kzalloc(temp_len, GFP_KERNEL);
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000978 if (vol->password == NULL) {
Steve French50c2f752007-07-13 00:33:32 +0000979 printk(KERN_WARNING "CIFS: no memory "
980 "for password\n");
Sean Finneyb9468452011-04-11 13:19:32 +0000981 goto cifs_parse_mount_err;
Steve French433dc242005-04-28 22:41:08 -0700982 }
Steve French50c2f752007-07-13 00:33:32 +0000983 for (i = 0, j = 0; i < temp_len; i++, j++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700984 vol->password[j] = value[i];
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000985 if (value[i] == separator[0]
Steve French09d1db52005-04-28 22:41:08 -0700986 && value[i+1] == separator[0]) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700987 /* skip second comma */
988 i++;
989 }
990 }
991 vol->password[j] = 0;
992 } else {
Pekka Enberge915fc42005-09-06 15:18:35 -0700993 vol->password = kzalloc(temp_len+1, GFP_KERNEL);
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000994 if (vol->password == NULL) {
Steve French50c2f752007-07-13 00:33:32 +0000995 printk(KERN_WARNING "CIFS: no memory "
996 "for password\n");
Sean Finneyb9468452011-04-11 13:19:32 +0000997 goto cifs_parse_mount_err;
Steve French433dc242005-04-28 22:41:08 -0700998 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700999 strcpy(vol->password, value);
1000 }
Jeff Layton58f7f682009-06-10 09:57:55 -04001001 } else if (!strnicmp(data, "ip", 2) ||
1002 !strnicmp(data, "addr", 4)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001003 if (!value || !*value) {
1004 vol->UNCip = NULL;
Jeff Layton50b64e32009-06-02 06:55:20 -04001005 } else if (strnlen(value, INET6_ADDRSTRLEN) <
1006 INET6_ADDRSTRLEN) {
Sean Finneyb9468452011-04-11 13:19:32 +00001007 vol->UNCip = kstrdup(value, GFP_KERNEL);
1008 if (!vol->UNCip) {
1009 printk(KERN_WARNING "CIFS: no memory "
1010 "for UNC IP\n");
1011 goto cifs_parse_mount_err;
1012 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001013 } else {
Steve French50c2f752007-07-13 00:33:32 +00001014 printk(KERN_WARNING "CIFS: ip address "
1015 "too long\n");
Sean Finneyb9468452011-04-11 13:19:32 +00001016 goto cifs_parse_mount_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001017 }
Steve French50c2f752007-07-13 00:33:32 +00001018 } else if (strnicmp(data, "sec", 3) == 0) {
1019 if (!value || !*value) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00001020 cERROR(1, "no security value specified");
Steve French50c2f752007-07-13 00:33:32 +00001021 continue;
1022 } else if (strnicmp(value, "krb5i", 5) == 0) {
1023 vol->secFlg |= CIFSSEC_MAY_KRB5 |
Steve French189acaa2006-06-23 02:33:48 +00001024 CIFSSEC_MUST_SIGN;
Steve Frenchbf820672005-12-01 22:32:42 -08001025 } else if (strnicmp(value, "krb5p", 5) == 0) {
Steve French50c2f752007-07-13 00:33:32 +00001026 /* vol->secFlg |= CIFSSEC_MUST_SEAL |
1027 CIFSSEC_MAY_KRB5; */
Joe Perchesb6b38f72010-04-21 03:50:45 +00001028 cERROR(1, "Krb5 cifs privacy not supported");
Sean Finneyb9468452011-04-11 13:19:32 +00001029 goto cifs_parse_mount_err;
Steve Frenchbf820672005-12-01 22:32:42 -08001030 } else if (strnicmp(value, "krb5", 4) == 0) {
Steve French750d1152006-06-27 06:28:30 +00001031 vol->secFlg |= CIFSSEC_MAY_KRB5;
Steve Frenchac683922009-05-06 04:16:04 +00001032 } else if (strnicmp(value, "ntlmsspi", 8) == 0) {
1033 vol->secFlg |= CIFSSEC_MAY_NTLMSSP |
1034 CIFSSEC_MUST_SIGN;
1035 } else if (strnicmp(value, "ntlmssp", 7) == 0) {
1036 vol->secFlg |= CIFSSEC_MAY_NTLMSSP;
Steve Frenchbf820672005-12-01 22:32:42 -08001037 } else if (strnicmp(value, "ntlmv2i", 7) == 0) {
Steve French750d1152006-06-27 06:28:30 +00001038 vol->secFlg |= CIFSSEC_MAY_NTLMV2 |
Steve French189acaa2006-06-23 02:33:48 +00001039 CIFSSEC_MUST_SIGN;
Steve Frenchbf820672005-12-01 22:32:42 -08001040 } else if (strnicmp(value, "ntlmv2", 6) == 0) {
Steve French750d1152006-06-27 06:28:30 +00001041 vol->secFlg |= CIFSSEC_MAY_NTLMV2;
Steve Frenchbf820672005-12-01 22:32:42 -08001042 } else if (strnicmp(value, "ntlmi", 5) == 0) {
Steve French750d1152006-06-27 06:28:30 +00001043 vol->secFlg |= CIFSSEC_MAY_NTLM |
Steve French189acaa2006-06-23 02:33:48 +00001044 CIFSSEC_MUST_SIGN;
Steve Frenchbf820672005-12-01 22:32:42 -08001045 } else if (strnicmp(value, "ntlm", 4) == 0) {
1046 /* ntlm is default so can be turned off too */
Steve French750d1152006-06-27 06:28:30 +00001047 vol->secFlg |= CIFSSEC_MAY_NTLM;
Steve Frenchbf820672005-12-01 22:32:42 -08001048 } else if (strnicmp(value, "nontlm", 6) == 0) {
Steve French189acaa2006-06-23 02:33:48 +00001049 /* BB is there a better way to do this? */
Steve French750d1152006-06-27 06:28:30 +00001050 vol->secFlg |= CIFSSEC_MAY_NTLMV2;
Steve French189acaa2006-06-23 02:33:48 +00001051#ifdef CONFIG_CIFS_WEAK_PW_HASH
1052 } else if (strnicmp(value, "lanman", 6) == 0) {
Steve French50c2f752007-07-13 00:33:32 +00001053 vol->secFlg |= CIFSSEC_MAY_LANMAN;
Steve French189acaa2006-06-23 02:33:48 +00001054#endif
Steve Frenchbf820672005-12-01 22:32:42 -08001055 } else if (strnicmp(value, "none", 4) == 0) {
Steve French189acaa2006-06-23 02:33:48 +00001056 vol->nullauth = 1;
Steve French50c2f752007-07-13 00:33:32 +00001057 } else {
Joe Perchesb6b38f72010-04-21 03:50:45 +00001058 cERROR(1, "bad security option: %s", value);
Sean Finneyb9468452011-04-11 13:19:32 +00001059 goto cifs_parse_mount_err;
Steve French50c2f752007-07-13 00:33:32 +00001060 }
Steve French1cb06d02011-02-24 18:07:19 +00001061 } else if (strnicmp(data, "vers", 3) == 0) {
1062 if (!value || !*value) {
1063 cERROR(1, "no protocol version specified"
1064 " after vers= mount option");
1065 } else if ((strnicmp(value, "cifs", 4) == 0) ||
1066 (strnicmp(value, "1", 1) == 0)) {
1067 /* this is the default */
1068 continue;
Steve French1cb06d02011-02-24 18:07:19 +00001069 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001070 } else if ((strnicmp(data, "unc", 3) == 0)
1071 || (strnicmp(data, "target", 6) == 0)
1072 || (strnicmp(data, "path", 4) == 0)) {
1073 if (!value || !*value) {
Steve French50c2f752007-07-13 00:33:32 +00001074 printk(KERN_WARNING "CIFS: invalid path to "
1075 "network resource\n");
Sean Finneyb9468452011-04-11 13:19:32 +00001076 goto cifs_parse_mount_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001077 }
1078 if ((temp_len = strnlen(value, 300)) < 300) {
Steve French50c2f752007-07-13 00:33:32 +00001079 vol->UNC = kmalloc(temp_len+1, GFP_KERNEL);
Steve French4523cc32007-04-30 20:13:06 +00001080 if (vol->UNC == NULL)
Sean Finneyb9468452011-04-11 13:19:32 +00001081 goto cifs_parse_mount_err;
Steve French50c2f752007-07-13 00:33:32 +00001082 strcpy(vol->UNC, value);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001083 if (strncmp(vol->UNC, "//", 2) == 0) {
1084 vol->UNC[0] = '\\';
1085 vol->UNC[1] = '\\';
Steve French50c2f752007-07-13 00:33:32 +00001086 } else if (strncmp(vol->UNC, "\\\\", 2) != 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001087 printk(KERN_WARNING
Steve French50c2f752007-07-13 00:33:32 +00001088 "CIFS: UNC Path does not begin "
1089 "with // or \\\\ \n");
Sean Finneyb9468452011-04-11 13:19:32 +00001090 goto cifs_parse_mount_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001091 }
1092 } else {
1093 printk(KERN_WARNING "CIFS: UNC name too long\n");
Sean Finneyb9468452011-04-11 13:19:32 +00001094 goto cifs_parse_mount_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001095 }
1096 } else if ((strnicmp(data, "domain", 3) == 0)
1097 || (strnicmp(data, "workgroup", 5) == 0)) {
1098 if (!value || !*value) {
1099 printk(KERN_WARNING "CIFS: invalid domain name\n");
Sean Finneyb9468452011-04-11 13:19:32 +00001100 goto cifs_parse_mount_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001101 }
1102 /* BB are there cases in which a comma can be valid in
1103 a domain name and need special handling? */
Steve French39798772006-05-31 22:40:51 +00001104 if (strnlen(value, 256) < 256) {
Sean Finneyb9468452011-04-11 13:19:32 +00001105 vol->domainname = kstrdup(value, GFP_KERNEL);
1106 if (!vol->domainname) {
1107 printk(KERN_WARNING "CIFS: no memory "
1108 "for domainname\n");
1109 goto cifs_parse_mount_err;
1110 }
Joe Perchesb6b38f72010-04-21 03:50:45 +00001111 cFYI(1, "Domain name set");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001112 } else {
Steve French50c2f752007-07-13 00:33:32 +00001113 printk(KERN_WARNING "CIFS: domain name too "
1114 "long\n");
Sean Finneyb9468452011-04-11 13:19:32 +00001115 goto cifs_parse_mount_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001116 }
Ben Greear3eb9a882010-09-01 17:06:02 -07001117 } else if (strnicmp(data, "srcaddr", 7) == 0) {
1118 vol->srcaddr.ss_family = AF_UNSPEC;
1119
1120 if (!value || !*value) {
1121 printk(KERN_WARNING "CIFS: srcaddr value"
1122 " not specified.\n");
Sean Finneyb9468452011-04-11 13:19:32 +00001123 goto cifs_parse_mount_err;
Ben Greear3eb9a882010-09-01 17:06:02 -07001124 }
1125 i = cifs_convert_address((struct sockaddr *)&vol->srcaddr,
1126 value, strlen(value));
Dan Carpenterb235f372010-10-25 07:02:56 +02001127 if (i == 0) {
Ben Greear3eb9a882010-09-01 17:06:02 -07001128 printk(KERN_WARNING "CIFS: Could not parse"
1129 " srcaddr: %s\n",
1130 value);
Sean Finneyb9468452011-04-11 13:19:32 +00001131 goto cifs_parse_mount_err;
Ben Greear3eb9a882010-09-01 17:06:02 -07001132 }
Steve French50c2f752007-07-13 00:33:32 +00001133 } else if (strnicmp(data, "prefixpath", 10) == 0) {
1134 if (!value || !*value) {
1135 printk(KERN_WARNING
1136 "CIFS: invalid path prefix\n");
Sean Finneyb9468452011-04-11 13:19:32 +00001137 goto cifs_parse_mount_err;
Steve French50c2f752007-07-13 00:33:32 +00001138 }
1139 if ((temp_len = strnlen(value, 1024)) < 1024) {
Steve French4523cc32007-04-30 20:13:06 +00001140 if (value[0] != '/')
Steve French2fe87f02006-09-21 07:02:52 +00001141 temp_len++; /* missing leading slash */
Steve French50c2f752007-07-13 00:33:32 +00001142 vol->prepath = kmalloc(temp_len+1, GFP_KERNEL);
1143 if (vol->prepath == NULL)
Sean Finneyb9468452011-04-11 13:19:32 +00001144 goto cifs_parse_mount_err;
Steve French4523cc32007-04-30 20:13:06 +00001145 if (value[0] != '/') {
Steve French2fe87f02006-09-21 07:02:52 +00001146 vol->prepath[0] = '/';
Steve French50c2f752007-07-13 00:33:32 +00001147 strcpy(vol->prepath+1, value);
Steve French2fe87f02006-09-21 07:02:52 +00001148 } else
Steve French50c2f752007-07-13 00:33:32 +00001149 strcpy(vol->prepath, value);
Joe Perchesb6b38f72010-04-21 03:50:45 +00001150 cFYI(1, "prefix path %s", vol->prepath);
Steve French50c2f752007-07-13 00:33:32 +00001151 } else {
1152 printk(KERN_WARNING "CIFS: prefix too long\n");
Sean Finneyb9468452011-04-11 13:19:32 +00001153 goto cifs_parse_mount_err;
Steve French50c2f752007-07-13 00:33:32 +00001154 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001155 } else if (strnicmp(data, "iocharset", 9) == 0) {
1156 if (!value || !*value) {
Steve French63135e02007-07-17 17:34:02 +00001157 printk(KERN_WARNING "CIFS: invalid iocharset "
1158 "specified\n");
Sean Finneyb9468452011-04-11 13:19:32 +00001159 goto cifs_parse_mount_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001160 }
1161 if (strnlen(value, 65) < 65) {
Sean Finneyb9468452011-04-11 13:19:32 +00001162 if (strnicmp(value, "default", 7)) {
1163 vol->iocharset = kstrdup(value,
1164 GFP_KERNEL);
1165
1166 if (!vol->iocharset) {
1167 printk(KERN_WARNING "CIFS: no "
1168 "memory for"
1169 "charset\n");
1170 goto cifs_parse_mount_err;
1171 }
1172 }
Steve French50c2f752007-07-13 00:33:32 +00001173 /* if iocharset not set then load_nls_default
1174 is used by caller */
Joe Perchesb6b38f72010-04-21 03:50:45 +00001175 cFYI(1, "iocharset set to %s", value);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001176 } else {
Steve French63135e02007-07-17 17:34:02 +00001177 printk(KERN_WARNING "CIFS: iocharset name "
1178 "too long.\n");
Sean Finneyb9468452011-04-11 13:19:32 +00001179 goto cifs_parse_mount_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001180 }
Jeff Layton9b9d6b242009-07-31 06:56:09 -04001181 } else if (!strnicmp(data, "uid", 3) && value && *value) {
1182 vol->linux_uid = simple_strtoul(value, &value, 0);
1183 uid_specified = true;
Jeff Laytonbd763312011-01-11 10:33:24 -05001184 } else if (!strnicmp(data, "cruid", 5) && value && *value) {
1185 vol->cred_uid = simple_strtoul(value, &value, 0);
Jeff Layton9b9d6b242009-07-31 06:56:09 -04001186 } else if (!strnicmp(data, "forceuid", 8)) {
1187 override_uid = 1;
1188 } else if (!strnicmp(data, "noforceuid", 10)) {
1189 override_uid = 0;
1190 } else if (!strnicmp(data, "gid", 3) && value && *value) {
1191 vol->linux_gid = simple_strtoul(value, &value, 0);
1192 gid_specified = true;
1193 } else if (!strnicmp(data, "forcegid", 8)) {
1194 override_gid = 1;
1195 } else if (!strnicmp(data, "noforcegid", 10)) {
1196 override_gid = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001197 } else if (strnicmp(data, "file_mode", 4) == 0) {
1198 if (value && *value) {
1199 vol->file_mode =
1200 simple_strtoul(value, &value, 0);
1201 }
1202 } else if (strnicmp(data, "dir_mode", 4) == 0) {
1203 if (value && *value) {
1204 vol->dir_mode =
1205 simple_strtoul(value, &value, 0);
1206 }
1207 } else if (strnicmp(data, "dirmode", 4) == 0) {
1208 if (value && *value) {
1209 vol->dir_mode =
1210 simple_strtoul(value, &value, 0);
1211 }
1212 } else if (strnicmp(data, "port", 4) == 0) {
1213 if (value && *value) {
1214 vol->port =
1215 simple_strtoul(value, &value, 0);
1216 }
1217 } else if (strnicmp(data, "rsize", 5) == 0) {
1218 if (value && *value) {
1219 vol->rsize =
1220 simple_strtoul(value, &value, 0);
1221 }
1222 } else if (strnicmp(data, "wsize", 5) == 0) {
1223 if (value && *value) {
1224 vol->wsize =
1225 simple_strtoul(value, &value, 0);
1226 }
1227 } else if (strnicmp(data, "sockopt", 5) == 0) {
Steve French6a5fa2362010-01-01 01:28:43 +00001228 if (!value || !*value) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00001229 cERROR(1, "no socket option specified");
Steve French6a5fa2362010-01-01 01:28:43 +00001230 continue;
1231 } else if (strnicmp(value, "TCP_NODELAY", 11) == 0) {
1232 vol->sockopt_tcp_nodelay = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001233 }
1234 } else if (strnicmp(data, "netbiosname", 4) == 0) {
1235 if (!value || !*value || (*value == ' ')) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00001236 cFYI(1, "invalid (empty) netbiosname");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001237 } else {
Jeff Layton1397f2e2011-01-07 11:30:28 -05001238 memset(vol->source_rfc1001_name, 0x20,
1239 RFC1001_NAME_LEN);
1240 /*
1241 * FIXME: are there cases in which a comma can
1242 * be valid in workstation netbios name (and
1243 * need special handling)?
1244 */
1245 for (i = 0; i < RFC1001_NAME_LEN; i++) {
1246 /* don't ucase netbiosname for user */
Steve French50c2f752007-07-13 00:33:32 +00001247 if (value[i] == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001248 break;
Jeff Layton1397f2e2011-01-07 11:30:28 -05001249 vol->source_rfc1001_name[i] = value[i];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001250 }
1251 /* The string has 16th byte zero still from
1252 set at top of the function */
Jeff Layton1397f2e2011-01-07 11:30:28 -05001253 if (i == RFC1001_NAME_LEN && value[i] != 0)
Steve French50c2f752007-07-13 00:33:32 +00001254 printk(KERN_WARNING "CIFS: netbiosname"
1255 " longer than 15 truncated.\n");
Steve Frencha10faeb22005-08-22 21:38:31 -07001256 }
1257 } else if (strnicmp(data, "servern", 7) == 0) {
1258 /* servernetbiosname specified override *SMBSERVER */
1259 if (!value || !*value || (*value == ' ')) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00001260 cFYI(1, "empty server netbiosname specified");
Steve Frencha10faeb22005-08-22 21:38:31 -07001261 } else {
1262 /* last byte, type, is 0x20 for servr type */
Jeff Layton1397f2e2011-01-07 11:30:28 -05001263 memset(vol->target_rfc1001_name, 0x20,
1264 RFC1001_NAME_LEN_WITH_NULL);
Steve Frencha10faeb22005-08-22 21:38:31 -07001265
Steve French50c2f752007-07-13 00:33:32 +00001266 for (i = 0; i < 15; i++) {
Steve Frencha10faeb22005-08-22 21:38:31 -07001267 /* BB are there cases in which a comma can be
Steve French50c2f752007-07-13 00:33:32 +00001268 valid in this workstation netbios name
1269 (and need special handling)? */
Steve Frencha10faeb22005-08-22 21:38:31 -07001270
Steve French50c2f752007-07-13 00:33:32 +00001271 /* user or mount helper must uppercase
1272 the netbiosname */
1273 if (value[i] == 0)
Steve Frencha10faeb22005-08-22 21:38:31 -07001274 break;
1275 else
Steve French50c2f752007-07-13 00:33:32 +00001276 vol->target_rfc1001_name[i] =
1277 value[i];
Steve Frencha10faeb22005-08-22 21:38:31 -07001278 }
1279 /* The string has 16th byte zero still from
1280 set at top of the function */
Jeff Layton1397f2e2011-01-07 11:30:28 -05001281 if (i == RFC1001_NAME_LEN && value[i] != 0)
Steve French50c2f752007-07-13 00:33:32 +00001282 printk(KERN_WARNING "CIFS: server net"
1283 "biosname longer than 15 truncated.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001284 }
Suresh Jayaraman6d20e842010-12-01 14:42:28 +05301285 } else if (strnicmp(data, "actimeo", 7) == 0) {
1286 if (value && *value) {
1287 vol->actimeo = HZ * simple_strtoul(value,
1288 &value, 0);
1289 if (vol->actimeo > CIFS_MAX_ACTIMEO) {
1290 cERROR(1, "CIFS: attribute cache"
1291 "timeout too large");
Sean Finneyb9468452011-04-11 13:19:32 +00001292 goto cifs_parse_mount_err;
Suresh Jayaraman6d20e842010-12-01 14:42:28 +05301293 }
1294 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001295 } else if (strnicmp(data, "credentials", 4) == 0) {
1296 /* ignore */
1297 } else if (strnicmp(data, "version", 3) == 0) {
1298 /* ignore */
Steve French50c2f752007-07-13 00:33:32 +00001299 } else if (strnicmp(data, "guest", 5) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001300 /* ignore */
Steve French71a394f2009-06-26 04:07:18 +00001301 } else if (strnicmp(data, "rw", 2) == 0) {
1302 /* ignore */
1303 } else if (strnicmp(data, "ro", 2) == 0) {
1304 /* ignore */
Steve Frenchedf1ae42008-10-29 00:47:57 +00001305 } else if (strnicmp(data, "noblocksend", 11) == 0) {
1306 vol->noblocksnd = 1;
1307 } else if (strnicmp(data, "noautotune", 10) == 0) {
1308 vol->noautotune = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001309 } else if ((strnicmp(data, "suid", 4) == 0) ||
1310 (strnicmp(data, "nosuid", 6) == 0) ||
1311 (strnicmp(data, "exec", 4) == 0) ||
1312 (strnicmp(data, "noexec", 6) == 0) ||
1313 (strnicmp(data, "nodev", 5) == 0) ||
1314 (strnicmp(data, "noauto", 6) == 0) ||
1315 (strnicmp(data, "dev", 3) == 0)) {
1316 /* The mount tool or mount.cifs helper (if present)
Steve French50c2f752007-07-13 00:33:32 +00001317 uses these opts to set flags, and the flags are read
1318 by the kernel vfs layer before we get here (ie
1319 before read super) so there is no point trying to
1320 parse these options again and set anything and it
1321 is ok to just ignore them */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001322 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001323 } else if (strnicmp(data, "hard", 4) == 0) {
1324 vol->retry = 1;
1325 } else if (strnicmp(data, "soft", 4) == 0) {
1326 vol->retry = 0;
1327 } else if (strnicmp(data, "perm", 4) == 0) {
1328 vol->noperm = 0;
1329 } else if (strnicmp(data, "noperm", 6) == 0) {
1330 vol->noperm = 1;
Steve French6a0b4822005-04-28 22:41:05 -07001331 } else if (strnicmp(data, "mapchars", 8) == 0) {
1332 vol->remap = 1;
1333 } else if (strnicmp(data, "nomapchars", 10) == 0) {
1334 vol->remap = 0;
Steve French50c2f752007-07-13 00:33:32 +00001335 } else if (strnicmp(data, "sfu", 3) == 0) {
1336 vol->sfu_emul = 1;
1337 } else if (strnicmp(data, "nosfu", 5) == 0) {
1338 vol->sfu_emul = 0;
Steve French2c1b8612008-10-16 18:35:21 +00001339 } else if (strnicmp(data, "nodfs", 5) == 0) {
1340 vol->nodfs = 1;
Jeremy Allisonac670552005-06-22 17:26:35 -07001341 } else if (strnicmp(data, "posixpaths", 10) == 0) {
1342 vol->posix_paths = 1;
1343 } else if (strnicmp(data, "noposixpaths", 12) == 0) {
1344 vol->posix_paths = 0;
Steve Frenchc18c8422007-07-18 23:21:09 +00001345 } else if (strnicmp(data, "nounix", 6) == 0) {
1346 vol->no_linux_ext = 1;
1347 } else if (strnicmp(data, "nolinux", 7) == 0) {
1348 vol->no_linux_ext = 1;
Steve French50c2f752007-07-13 00:33:32 +00001349 } else if ((strnicmp(data, "nocase", 6) == 0) ||
Steve Frencha10faeb22005-08-22 21:38:31 -07001350 (strnicmp(data, "ignorecase", 10) == 0)) {
Steve French50c2f752007-07-13 00:33:32 +00001351 vol->nocase = 1;
Jeff Laytonf636a342010-07-26 10:29:58 -04001352 } else if (strnicmp(data, "mand", 4) == 0) {
1353 /* ignore */
1354 } else if (strnicmp(data, "nomand", 6) == 0) {
1355 /* ignore */
1356 } else if (strnicmp(data, "_netdev", 7) == 0) {
1357 /* ignore */
Steve Frenchc46fa8a2005-08-18 20:49:57 -07001358 } else if (strnicmp(data, "brl", 3) == 0) {
1359 vol->nobrl = 0;
Steve French50c2f752007-07-13 00:33:32 +00001360 } else if ((strnicmp(data, "nobrl", 5) == 0) ||
Steve French1c955182005-08-30 20:58:07 -07001361 (strnicmp(data, "nolock", 6) == 0)) {
Steve Frenchc46fa8a2005-08-18 20:49:57 -07001362 vol->nobrl = 1;
Steve Frenchd3485d32005-08-19 11:04:29 -07001363 /* turn off mandatory locking in mode
1364 if remote locking is turned off since the
1365 local vfs will do advisory */
Steve French50c2f752007-07-13 00:33:32 +00001366 if (vol->file_mode ==
1367 (S_IALLUGO & ~(S_ISUID | S_IXGRP)))
Steve Frenchd3485d32005-08-19 11:04:29 -07001368 vol->file_mode = S_IALLUGO;
Steve French13a6e422008-12-02 17:24:33 +00001369 } else if (strnicmp(data, "forcemandatorylock", 9) == 0) {
1370 /* will take the shorter form "forcemand" as well */
1371 /* This mount option will force use of mandatory
1372 (DOS/Windows style) byte range locks, instead of
1373 using posix advisory byte range locks, even if the
1374 Unix extensions are available and posix locks would
1375 be supported otherwise. If Unix extensions are not
1376 negotiated this has no effect since mandatory locks
1377 would be used (mandatory locks is all that those
1378 those servers support) */
1379 vol->mand_lock = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001380 } else if (strnicmp(data, "setuids", 7) == 0) {
1381 vol->setuids = 1;
1382 } else if (strnicmp(data, "nosetuids", 9) == 0) {
1383 vol->setuids = 0;
Jeff Laytond0a9c072008-05-12 22:23:49 +00001384 } else if (strnicmp(data, "dynperm", 7) == 0) {
1385 vol->dynperm = true;
1386 } else if (strnicmp(data, "nodynperm", 9) == 0) {
1387 vol->dynperm = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001388 } else if (strnicmp(data, "nohard", 6) == 0) {
1389 vol->retry = 0;
1390 } else if (strnicmp(data, "nosoft", 6) == 0) {
1391 vol->retry = 1;
1392 } else if (strnicmp(data, "nointr", 6) == 0) {
1393 vol->intr = 0;
1394 } else if (strnicmp(data, "intr", 4) == 0) {
1395 vol->intr = 1;
Steve Frenchbe652442009-02-23 15:21:59 +00001396 } else if (strnicmp(data, "nostrictsync", 12) == 0) {
1397 vol->nostrictsync = 1;
1398 } else if (strnicmp(data, "strictsync", 10) == 0) {
1399 vol->nostrictsync = 0;
Steve French50c2f752007-07-13 00:33:32 +00001400 } else if (strnicmp(data, "serverino", 7) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001401 vol->server_ino = 1;
Steve French50c2f752007-07-13 00:33:32 +00001402 } else if (strnicmp(data, "noserverino", 9) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001403 vol->server_ino = 0;
Pavel Shilovskyd4ffff12011-05-26 06:02:00 +00001404 } else if (strnicmp(data, "rwpidforward", 4) == 0) {
1405 vol->rwpidforward = 1;
Steve French50c2f752007-07-13 00:33:32 +00001406 } else if (strnicmp(data, "cifsacl", 7) == 0) {
Steve French0a4b92c2006-01-12 15:44:21 -08001407 vol->cifs_acl = 1;
1408 } else if (strnicmp(data, "nocifsacl", 9) == 0) {
1409 vol->cifs_acl = 0;
Steve French50c2f752007-07-13 00:33:32 +00001410 } else if (strnicmp(data, "acl", 3) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001411 vol->no_psx_acl = 0;
Steve French50c2f752007-07-13 00:33:32 +00001412 } else if (strnicmp(data, "noacl", 5) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001413 vol->no_psx_acl = 1;
Steve French84210e92008-10-23 04:42:37 +00001414 } else if (strnicmp(data, "locallease", 6) == 0) {
1415 vol->local_lease = 1;
Steve French50c2f752007-07-13 00:33:32 +00001416 } else if (strnicmp(data, "sign", 4) == 0) {
Steve French750d1152006-06-27 06:28:30 +00001417 vol->secFlg |= CIFSSEC_MUST_SIGN;
Steve French95b1cb92008-05-15 16:44:38 +00001418 } else if (strnicmp(data, "seal", 4) == 0) {
1419 /* we do not do the following in secFlags because seal
1420 is a per tree connection (mount) not a per socket
1421 or per-smb connection option in the protocol */
1422 /* vol->secFlg |= CIFSSEC_MUST_SEAL; */
1423 vol->seal = 1;
Steve French50c2f752007-07-13 00:33:32 +00001424 } else if (strnicmp(data, "direct", 6) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001425 vol->direct_io = 1;
Steve French50c2f752007-07-13 00:33:32 +00001426 } else if (strnicmp(data, "forcedirectio", 13) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001427 vol->direct_io = 1;
Pavel Shilovskyd39454f2011-01-24 14:16:35 -05001428 } else if (strnicmp(data, "strictcache", 11) == 0) {
1429 vol->strict_io = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001430 } else if (strnicmp(data, "noac", 4) == 0) {
Steve French50c2f752007-07-13 00:33:32 +00001431 printk(KERN_WARNING "CIFS: Mount option noac not "
1432 "supported. Instead set "
1433 "/proc/fs/cifs/LookupCacheEnabled to 0\n");
Suresh Jayaramanfa1df752010-07-05 18:13:36 +05301434 } else if (strnicmp(data, "fsc", 3) == 0) {
Suresh Jayaraman607a5692010-11-24 17:49:05 +05301435#ifndef CONFIG_CIFS_FSCACHE
Jeff Layton83fb0862011-06-08 07:35:24 -04001436 cERROR(1, "FS-Cache support needs CONFIG_CIFS_FSCACHE "
Suresh Jayaraman607a5692010-11-24 17:49:05 +05301437 "kernel config option set");
Sean Finneyb9468452011-04-11 13:19:32 +00001438 goto cifs_parse_mount_err;
Suresh Jayaraman607a5692010-11-24 17:49:05 +05301439#endif
Suresh Jayaramanfa1df752010-07-05 18:13:36 +05301440 vol->fsc = true;
Stefan Metzmacher736a3322010-07-30 14:56:00 +02001441 } else if (strnicmp(data, "mfsymlinks", 10) == 0) {
1442 vol->mfsymlinks = true;
Jeff Layton0eb8a132010-10-06 19:51:12 -04001443 } else if (strnicmp(data, "multiuser", 8) == 0) {
1444 vol->multiuser = true;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001445 } else
Steve French50c2f752007-07-13 00:33:32 +00001446 printk(KERN_WARNING "CIFS: Unknown mount option %s\n",
1447 data);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001448 }
1449 if (vol->UNC == NULL) {
Steve French4523cc32007-04-30 20:13:06 +00001450 if (devname == NULL) {
Steve French50c2f752007-07-13 00:33:32 +00001451 printk(KERN_WARNING "CIFS: Missing UNC name for mount "
1452 "target\n");
Sean Finneyb9468452011-04-11 13:19:32 +00001453 goto cifs_parse_mount_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001454 }
1455 if ((temp_len = strnlen(devname, 300)) < 300) {
Steve French50c2f752007-07-13 00:33:32 +00001456 vol->UNC = kmalloc(temp_len+1, GFP_KERNEL);
Steve French4523cc32007-04-30 20:13:06 +00001457 if (vol->UNC == NULL)
Sean Finneyb9468452011-04-11 13:19:32 +00001458 goto cifs_parse_mount_err;
Steve French50c2f752007-07-13 00:33:32 +00001459 strcpy(vol->UNC, devname);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001460 if (strncmp(vol->UNC, "//", 2) == 0) {
1461 vol->UNC[0] = '\\';
1462 vol->UNC[1] = '\\';
1463 } else if (strncmp(vol->UNC, "\\\\", 2) != 0) {
Steve French50c2f752007-07-13 00:33:32 +00001464 printk(KERN_WARNING "CIFS: UNC Path does not "
1465 "begin with // or \\\\ \n");
Sean Finneyb9468452011-04-11 13:19:32 +00001466 goto cifs_parse_mount_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001467 }
Igor Mammedov7c5e6282008-05-08 20:48:42 +00001468 value = strpbrk(vol->UNC+2, "/\\");
1469 if (value)
1470 *value = '\\';
Linus Torvalds1da177e2005-04-16 15:20:36 -07001471 } else {
1472 printk(KERN_WARNING "CIFS: UNC name too long\n");
Sean Finneyb9468452011-04-11 13:19:32 +00001473 goto cifs_parse_mount_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001474 }
1475 }
Jeff Layton0eb8a132010-10-06 19:51:12 -04001476
1477 if (vol->multiuser && !(vol->secFlg & CIFSSEC_MAY_KRB5)) {
1478 cERROR(1, "Multiuser mounts currently require krb5 "
1479 "authentication!");
Sean Finneyb9468452011-04-11 13:19:32 +00001480 goto cifs_parse_mount_err;
Jeff Layton0eb8a132010-10-06 19:51:12 -04001481 }
1482
Steve Frenchfb8c4b12007-07-10 01:16:18 +00001483 if (vol->UNCip == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001484 vol->UNCip = &vol->UNC[2];
1485
Jeff Layton9b9d6b242009-07-31 06:56:09 -04001486 if (uid_specified)
1487 vol->override_uid = override_uid;
1488 else if (override_uid == 1)
1489 printk(KERN_NOTICE "CIFS: ignoring forceuid mount option "
1490 "specified with no uid= option.\n");
1491
1492 if (gid_specified)
1493 vol->override_gid = override_gid;
1494 else if (override_gid == 1)
1495 printk(KERN_NOTICE "CIFS: ignoring forcegid mount option "
1496 "specified with no gid= option.\n");
1497
Sean Finneyb9468452011-04-11 13:19:32 +00001498 kfree(mountdata_copy);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001499 return 0;
Sean Finneyb9468452011-04-11 13:19:32 +00001500
1501cifs_parse_mount_err:
1502 kfree(mountdata_copy);
1503 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001504}
1505
Ben Greear3eb9a882010-09-01 17:06:02 -07001506/** Returns true if srcaddr isn't specified and rhs isn't
1507 * specified, or if srcaddr is specified and
1508 * matches the IP address of the rhs argument.
1509 */
Jeff Layton45151482010-07-06 20:43:02 -04001510static bool
Ben Greear3eb9a882010-09-01 17:06:02 -07001511srcip_matches(struct sockaddr *srcaddr, struct sockaddr *rhs)
1512{
1513 switch (srcaddr->sa_family) {
1514 case AF_UNSPEC:
1515 return (rhs->sa_family == AF_UNSPEC);
1516 case AF_INET: {
1517 struct sockaddr_in *saddr4 = (struct sockaddr_in *)srcaddr;
1518 struct sockaddr_in *vaddr4 = (struct sockaddr_in *)rhs;
1519 return (saddr4->sin_addr.s_addr == vaddr4->sin_addr.s_addr);
1520 }
1521 case AF_INET6: {
1522 struct sockaddr_in6 *saddr6 = (struct sockaddr_in6 *)srcaddr;
1523 struct sockaddr_in6 *vaddr6 = (struct sockaddr_in6 *)&rhs;
1524 return ipv6_addr_equal(&saddr6->sin6_addr, &vaddr6->sin6_addr);
1525 }
1526 default:
1527 WARN_ON(1);
1528 return false; /* don't expect to be here */
1529 }
1530}
1531
Pavel Shilovsky4b886132010-12-13 22:18:07 +03001532/*
1533 * If no port is specified in addr structure, we try to match with 445 port
1534 * and if it fails - with 139 ports. It should be called only if address
1535 * families of server and addr are equal.
1536 */
1537static bool
1538match_port(struct TCP_Server_Info *server, struct sockaddr *addr)
1539{
Steve French6da97912011-03-13 18:55:55 +00001540 __be16 port, *sport;
Pavel Shilovsky4b886132010-12-13 22:18:07 +03001541
1542 switch (addr->sa_family) {
1543 case AF_INET:
1544 sport = &((struct sockaddr_in *) &server->dstaddr)->sin_port;
1545 port = ((struct sockaddr_in *) addr)->sin_port;
1546 break;
1547 case AF_INET6:
1548 sport = &((struct sockaddr_in6 *) &server->dstaddr)->sin6_port;
1549 port = ((struct sockaddr_in6 *) addr)->sin6_port;
1550 break;
1551 default:
1552 WARN_ON(1);
1553 return false;
1554 }
1555
1556 if (!port) {
1557 port = htons(CIFS_PORT);
1558 if (port == *sport)
1559 return true;
1560
1561 port = htons(RFC1001_PORT);
1562 }
1563
1564 return port == *sport;
1565}
Ben Greear3eb9a882010-09-01 17:06:02 -07001566
1567static bool
1568match_address(struct TCP_Server_Info *server, struct sockaddr *addr,
1569 struct sockaddr *srcaddr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001570{
Jeff Layton45151482010-07-06 20:43:02 -04001571 switch (addr->sa_family) {
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03001572 case AF_INET: {
1573 struct sockaddr_in *addr4 = (struct sockaddr_in *)addr;
1574 struct sockaddr_in *srv_addr4 =
1575 (struct sockaddr_in *)&server->dstaddr;
1576
1577 if (addr4->sin_addr.s_addr != srv_addr4->sin_addr.s_addr)
Jeff Layton45151482010-07-06 20:43:02 -04001578 return false;
Jeff Layton45151482010-07-06 20:43:02 -04001579 break;
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03001580 }
1581 case AF_INET6: {
1582 struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr;
1583 struct sockaddr_in6 *srv_addr6 =
1584 (struct sockaddr_in6 *)&server->dstaddr;
1585
Jeff Layton45151482010-07-06 20:43:02 -04001586 if (!ipv6_addr_equal(&addr6->sin6_addr,
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03001587 &srv_addr6->sin6_addr))
Jeff Layton45151482010-07-06 20:43:02 -04001588 return false;
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03001589 if (addr6->sin6_scope_id != srv_addr6->sin6_scope_id)
Jeff Layton45151482010-07-06 20:43:02 -04001590 return false;
Jeff Layton45151482010-07-06 20:43:02 -04001591 break;
1592 }
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03001593 default:
1594 WARN_ON(1);
1595 return false; /* don't expect to be here */
1596 }
Jeff Layton45151482010-07-06 20:43:02 -04001597
Ben Greear3eb9a882010-09-01 17:06:02 -07001598 if (!srcip_matches(srcaddr, (struct sockaddr *)&server->srcaddr))
1599 return false;
1600
Jeff Layton45151482010-07-06 20:43:02 -04001601 return true;
1602}
1603
Jeff Laytondaf5b0b2010-07-06 20:43:02 -04001604static bool
1605match_security(struct TCP_Server_Info *server, struct smb_vol *vol)
1606{
1607 unsigned int secFlags;
1608
1609 if (vol->secFlg & (~(CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL)))
1610 secFlags = vol->secFlg;
1611 else
1612 secFlags = global_secflags | vol->secFlg;
1613
1614 switch (server->secType) {
1615 case LANMAN:
1616 if (!(secFlags & (CIFSSEC_MAY_LANMAN|CIFSSEC_MAY_PLNTXT)))
1617 return false;
1618 break;
1619 case NTLMv2:
1620 if (!(secFlags & CIFSSEC_MAY_NTLMV2))
1621 return false;
1622 break;
1623 case NTLM:
1624 if (!(secFlags & CIFSSEC_MAY_NTLM))
1625 return false;
1626 break;
1627 case Kerberos:
1628 if (!(secFlags & CIFSSEC_MAY_KRB5))
1629 return false;
1630 break;
1631 case RawNTLMSSP:
1632 if (!(secFlags & CIFSSEC_MAY_NTLMSSP))
1633 return false;
1634 break;
1635 default:
1636 /* shouldn't happen */
1637 return false;
1638 }
1639
Lucas De Marchi25985ed2011-03-30 22:57:33 -03001640 /* now check if signing mode is acceptable */
Jeff Laytondaf5b0b2010-07-06 20:43:02 -04001641 if ((secFlags & CIFSSEC_MAY_SIGN) == 0 &&
Steve French96daf2b2011-05-27 04:34:02 +00001642 (server->sec_mode & SECMODE_SIGN_REQUIRED))
Jeff Laytondaf5b0b2010-07-06 20:43:02 -04001643 return false;
1644 else if (((secFlags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN) &&
Steve French96daf2b2011-05-27 04:34:02 +00001645 (server->sec_mode &
Jeff Laytondaf5b0b2010-07-06 20:43:02 -04001646 (SECMODE_SIGN_ENABLED|SECMODE_SIGN_REQUIRED)) == 0)
1647 return false;
1648
1649 return true;
1650}
1651
Pavel Shilovsky37bb04e2011-05-05 09:55:11 +00001652static int match_server(struct TCP_Server_Info *server, struct sockaddr *addr,
1653 struct smb_vol *vol)
1654{
1655 if (!net_eq(cifs_net_ns(server), current->nsproxy->net_ns))
1656 return 0;
1657
1658 if (!match_address(server, addr,
1659 (struct sockaddr *)&vol->srcaddr))
1660 return 0;
1661
1662 if (!match_port(server, addr))
1663 return 0;
1664
1665 if (!match_security(server, vol))
1666 return 0;
1667
1668 return 1;
1669}
1670
Jeff Layton45151482010-07-06 20:43:02 -04001671static struct TCP_Server_Info *
Jeff Laytondaf5b0b2010-07-06 20:43:02 -04001672cifs_find_tcp_session(struct sockaddr *addr, struct smb_vol *vol)
Jeff Layton45151482010-07-06 20:43:02 -04001673{
Jeff Laytone7ddee92008-11-14 13:44:38 -05001674 struct TCP_Server_Info *server;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001675
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05301676 spin_lock(&cifs_tcp_ses_lock);
Jeff Layton45151482010-07-06 20:43:02 -04001677 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
Pavel Shilovsky37bb04e2011-05-05 09:55:11 +00001678 if (!match_server(server, addr, vol))
Jeff Laytondaf5b0b2010-07-06 20:43:02 -04001679 continue;
1680
Jeff Laytone7ddee92008-11-14 13:44:38 -05001681 ++server->srv_count;
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05301682 spin_unlock(&cifs_tcp_ses_lock);
Joe Perchesb6b38f72010-04-21 03:50:45 +00001683 cFYI(1, "Existing tcp session with server found");
Jeff Laytone7ddee92008-11-14 13:44:38 -05001684 return server;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001685 }
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05301686 spin_unlock(&cifs_tcp_ses_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001687 return NULL;
1688}
1689
Jeff Layton14fbf502008-11-14 13:53:46 -05001690static void
Jeff Laytone7ddee92008-11-14 13:44:38 -05001691cifs_put_tcp_session(struct TCP_Server_Info *server)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001692{
Jeff Laytone7ddee92008-11-14 13:44:38 -05001693 struct task_struct *task;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001694
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05301695 spin_lock(&cifs_tcp_ses_lock);
Jeff Laytone7ddee92008-11-14 13:44:38 -05001696 if (--server->srv_count > 0) {
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05301697 spin_unlock(&cifs_tcp_ses_lock);
Jeff Laytone7ddee92008-11-14 13:44:38 -05001698 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001699 }
Steve Frenchdea570e02008-05-06 22:05:51 +00001700
Rob Landleyf1d0c992011-01-22 15:44:05 -06001701 put_net(cifs_net_ns(server));
1702
Jeff Laytone7ddee92008-11-14 13:44:38 -05001703 list_del_init(&server->tcp_ses_list);
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05301704 spin_unlock(&cifs_tcp_ses_lock);
Jeff Laytone7ddee92008-11-14 13:44:38 -05001705
Jeff Laytonc74093b2011-01-11 07:24:23 -05001706 cancel_delayed_work_sync(&server->echo);
1707
Jeff Laytone7ddee92008-11-14 13:44:38 -05001708 spin_lock(&GlobalMid_Lock);
1709 server->tcpStatus = CifsExiting;
1710 spin_unlock(&GlobalMid_Lock);
1711
Shirish Pargaonkard2b91522010-10-21 14:25:08 -05001712 cifs_crypto_shash_release(server);
Suresh Jayaraman488f1d2d2010-07-05 18:12:15 +05301713 cifs_fscache_release_client_cookie(server);
1714
Shirish Pargaonkar21e73392010-10-21 06:42:55 -05001715 kfree(server->session_key.response);
1716 server->session_key.response = NULL;
1717 server->session_key.len = 0;
1718
Jeff Laytone7ddee92008-11-14 13:44:38 -05001719 task = xchg(&server->tsk, NULL);
1720 if (task)
1721 force_sig(SIGKILL, task);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001722}
1723
Jeff Layton63c038c2008-12-01 18:41:46 -05001724static struct TCP_Server_Info *
1725cifs_get_tcp_session(struct smb_vol *volume_info)
1726{
1727 struct TCP_Server_Info *tcp_ses = NULL;
Jeff Laytona9ac49d2009-01-22 14:43:21 -05001728 struct sockaddr_storage addr;
Jeff Layton63c038c2008-12-01 18:41:46 -05001729 struct sockaddr_in *sin_server = (struct sockaddr_in *) &addr;
1730 struct sockaddr_in6 *sin_server6 = (struct sockaddr_in6 *) &addr;
1731 int rc;
1732
Jeff Laytona9ac49d2009-01-22 14:43:21 -05001733 memset(&addr, 0, sizeof(struct sockaddr_storage));
Jeff Layton63c038c2008-12-01 18:41:46 -05001734
Joe Perchesb6b38f72010-04-21 03:50:45 +00001735 cFYI(1, "UNC: %s ip: %s", volume_info->UNC, volume_info->UNCip);
Jeff Layton1e68b2b2009-06-11 10:27:30 -04001736
Jeff Layton63c038c2008-12-01 18:41:46 -05001737 if (volume_info->UNCip && volume_info->UNC) {
Jeff Layton50d97162010-07-06 20:43:01 -04001738 rc = cifs_fill_sockaddr((struct sockaddr *)&addr,
1739 volume_info->UNCip,
David Howells67b76262010-07-22 18:33:01 +01001740 strlen(volume_info->UNCip),
Jeff Layton50d97162010-07-06 20:43:01 -04001741 volume_info->port);
Jeff Layton1e68b2b2009-06-11 10:27:30 -04001742 if (!rc) {
Jeff Layton63c038c2008-12-01 18:41:46 -05001743 /* we failed translating address */
1744 rc = -EINVAL;
1745 goto out_err;
1746 }
Jeff Layton63c038c2008-12-01 18:41:46 -05001747 } else if (volume_info->UNCip) {
1748 /* BB using ip addr as tcp_ses name to connect to the
1749 DFS root below */
Joe Perchesb6b38f72010-04-21 03:50:45 +00001750 cERROR(1, "Connecting to DFS root not implemented yet");
Jeff Layton63c038c2008-12-01 18:41:46 -05001751 rc = -EINVAL;
1752 goto out_err;
1753 } else /* which tcp_sess DFS root would we conect to */ {
Joe Perchesb6b38f72010-04-21 03:50:45 +00001754 cERROR(1, "CIFS mount error: No UNC path (e.g. -o "
1755 "unc=//192.168.1.100/public) specified");
Jeff Layton63c038c2008-12-01 18:41:46 -05001756 rc = -EINVAL;
1757 goto out_err;
1758 }
1759
1760 /* see if we already have a matching tcp_ses */
Jeff Laytondaf5b0b2010-07-06 20:43:02 -04001761 tcp_ses = cifs_find_tcp_session((struct sockaddr *)&addr, volume_info);
Jeff Layton63c038c2008-12-01 18:41:46 -05001762 if (tcp_ses)
1763 return tcp_ses;
1764
1765 tcp_ses = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL);
1766 if (!tcp_ses) {
1767 rc = -ENOMEM;
1768 goto out_err;
1769 }
1770
Shirish Pargaonkard2b91522010-10-21 14:25:08 -05001771 rc = cifs_crypto_shash_allocate(tcp_ses);
1772 if (rc) {
1773 cERROR(1, "could not setup hash structures rc %d", rc);
1774 goto out_err;
1775 }
1776
Rob Landleyf1d0c992011-01-22 15:44:05 -06001777 cifs_set_net_ns(tcp_ses, get_net(current->nsproxy->net_ns));
Jeff Layton63c038c2008-12-01 18:41:46 -05001778 tcp_ses->hostname = extract_hostname(volume_info->UNC);
1779 if (IS_ERR(tcp_ses->hostname)) {
1780 rc = PTR_ERR(tcp_ses->hostname);
Shirish Pargaonkarf7c54452010-10-26 18:10:24 -05001781 goto out_err_crypto_release;
Jeff Layton63c038c2008-12-01 18:41:46 -05001782 }
1783
1784 tcp_ses->noblocksnd = volume_info->noblocksnd;
1785 tcp_ses->noautotune = volume_info->noautotune;
Steve French6a5fa2362010-01-01 01:28:43 +00001786 tcp_ses->tcp_nodelay = volume_info->sockopt_tcp_nodelay;
Jeff Layton63c038c2008-12-01 18:41:46 -05001787 atomic_set(&tcp_ses->inFlight, 0);
1788 init_waitqueue_head(&tcp_ses->response_q);
1789 init_waitqueue_head(&tcp_ses->request_q);
1790 INIT_LIST_HEAD(&tcp_ses->pending_mid_q);
1791 mutex_init(&tcp_ses->srv_mutex);
1792 memcpy(tcp_ses->workstation_RFC1001_name,
1793 volume_info->source_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL);
1794 memcpy(tcp_ses->server_RFC1001_name,
1795 volume_info->target_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL);
Shirish Pargaonkar5d0d2882010-10-13 18:15:00 -05001796 tcp_ses->session_estab = false;
Jeff Layton63c038c2008-12-01 18:41:46 -05001797 tcp_ses->sequence_number = 0;
Steve Frenchfda35942011-01-20 18:06:34 +00001798 tcp_ses->lstrp = jiffies;
Jeff Layton63c038c2008-12-01 18:41:46 -05001799 INIT_LIST_HEAD(&tcp_ses->tcp_ses_list);
1800 INIT_LIST_HEAD(&tcp_ses->smb_ses_list);
Jeff Laytonc74093b2011-01-11 07:24:23 -05001801 INIT_DELAYED_WORK(&tcp_ses->echo, cifs_echo_request);
Jeff Layton63c038c2008-12-01 18:41:46 -05001802
1803 /*
1804 * at this point we are the only ones with the pointer
1805 * to the struct since the kernel thread not created yet
1806 * no need to spinlock this init of tcpStatus or srv_count
1807 */
1808 tcp_ses->tcpStatus = CifsNew;
Ben Greear3eb9a882010-09-01 17:06:02 -07001809 memcpy(&tcp_ses->srcaddr, &volume_info->srcaddr,
1810 sizeof(tcp_ses->srcaddr));
Jeff Layton63c038c2008-12-01 18:41:46 -05001811 ++tcp_ses->srv_count;
1812
Jeff Laytona9ac49d2009-01-22 14:43:21 -05001813 if (addr.ss_family == AF_INET6) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00001814 cFYI(1, "attempting ipv6 connect");
Jeff Layton63c038c2008-12-01 18:41:46 -05001815 /* BB should we allow ipv6 on port 139? */
1816 /* other OS never observed in Wild doing 139 with v6 */
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03001817 memcpy(&tcp_ses->dstaddr, sin_server6,
1818 sizeof(struct sockaddr_in6));
1819 } else
1820 memcpy(&tcp_ses->dstaddr, sin_server,
1821 sizeof(struct sockaddr_in));
1822
1823 rc = ip_connect(tcp_ses);
Jeff Layton63c038c2008-12-01 18:41:46 -05001824 if (rc < 0) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00001825 cERROR(1, "Error connecting to socket. Aborting operation");
Shirish Pargaonkarf7c54452010-10-26 18:10:24 -05001826 goto out_err_crypto_release;
Jeff Layton63c038c2008-12-01 18:41:46 -05001827 }
1828
1829 /*
1830 * since we're in a cifs function already, we know that
1831 * this will succeed. No need for try_module_get().
1832 */
1833 __module_get(THIS_MODULE);
Al Viro7c97c202011-06-21 08:51:28 -04001834 tcp_ses->tsk = kthread_run(cifs_demultiplex_thread,
Jeff Layton63c038c2008-12-01 18:41:46 -05001835 tcp_ses, "cifsd");
1836 if (IS_ERR(tcp_ses->tsk)) {
1837 rc = PTR_ERR(tcp_ses->tsk);
Joe Perchesb6b38f72010-04-21 03:50:45 +00001838 cERROR(1, "error %d create cifsd thread", rc);
Jeff Layton63c038c2008-12-01 18:41:46 -05001839 module_put(THIS_MODULE);
Shirish Pargaonkarf7c54452010-10-26 18:10:24 -05001840 goto out_err_crypto_release;
Jeff Layton63c038c2008-12-01 18:41:46 -05001841 }
Steve Frenchfd88ce92011-04-12 01:01:14 +00001842 tcp_ses->tcpStatus = CifsNeedNegotiate;
Jeff Layton63c038c2008-12-01 18:41:46 -05001843
1844 /* thread spawned, put it on the list */
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05301845 spin_lock(&cifs_tcp_ses_lock);
Jeff Layton63c038c2008-12-01 18:41:46 -05001846 list_add(&tcp_ses->tcp_ses_list, &cifs_tcp_ses_list);
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05301847 spin_unlock(&cifs_tcp_ses_lock);
Jeff Layton63c038c2008-12-01 18:41:46 -05001848
Suresh Jayaraman488f1d2d2010-07-05 18:12:15 +05301849 cifs_fscache_get_client_cookie(tcp_ses);
1850
Jeff Laytonc74093b2011-01-11 07:24:23 -05001851 /* queue echo request delayed work */
1852 queue_delayed_work(system_nrt_wq, &tcp_ses->echo, SMB_ECHO_INTERVAL);
1853
Jeff Layton63c038c2008-12-01 18:41:46 -05001854 return tcp_ses;
1855
Shirish Pargaonkarf7c54452010-10-26 18:10:24 -05001856out_err_crypto_release:
Shirish Pargaonkard2b91522010-10-21 14:25:08 -05001857 cifs_crypto_shash_release(tcp_ses);
1858
Rob Landleyf1d0c992011-01-22 15:44:05 -06001859 put_net(cifs_net_ns(tcp_ses));
1860
Jeff Layton63c038c2008-12-01 18:41:46 -05001861out_err:
1862 if (tcp_ses) {
Steve French8347a5c2009-10-06 18:31:29 +00001863 if (!IS_ERR(tcp_ses->hostname))
1864 kfree(tcp_ses->hostname);
Jeff Layton63c038c2008-12-01 18:41:46 -05001865 if (tcp_ses->ssocket)
1866 sock_release(tcp_ses->ssocket);
1867 kfree(tcp_ses);
1868 }
1869 return ERR_PTR(rc);
1870}
1871
Steve French96daf2b2011-05-27 04:34:02 +00001872static int match_session(struct cifs_ses *ses, struct smb_vol *vol)
Pavel Shilovsky37bb04e2011-05-05 09:55:11 +00001873{
1874 switch (ses->server->secType) {
1875 case Kerberos:
1876 if (vol->cred_uid != ses->cred_uid)
1877 return 0;
1878 break;
1879 default:
1880 /* anything else takes username/password */
1881 if (ses->user_name == NULL)
1882 return 0;
1883 if (strncmp(ses->user_name, vol->username,
1884 MAX_USERNAME_SIZE))
1885 return 0;
1886 if (strlen(vol->username) != 0 &&
1887 ses->password != NULL &&
1888 strncmp(ses->password,
1889 vol->password ? vol->password : "",
1890 MAX_PASSWORD_SIZE))
1891 return 0;
1892 }
1893 return 1;
1894}
1895
Steve French96daf2b2011-05-27 04:34:02 +00001896static struct cifs_ses *
Jeff Layton4ff67b72010-07-06 20:43:02 -04001897cifs_find_smb_ses(struct TCP_Server_Info *server, struct smb_vol *vol)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001898{
Steve French96daf2b2011-05-27 04:34:02 +00001899 struct cifs_ses *ses;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001900
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05301901 spin_lock(&cifs_tcp_ses_lock);
Jeff Layton4ff67b72010-07-06 20:43:02 -04001902 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
Pavel Shilovsky37bb04e2011-05-05 09:55:11 +00001903 if (!match_session(ses, vol))
1904 continue;
Jeff Layton14fbf502008-11-14 13:53:46 -05001905 ++ses->ses_count;
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05301906 spin_unlock(&cifs_tcp_ses_lock);
Jeff Layton14fbf502008-11-14 13:53:46 -05001907 return ses;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001908 }
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05301909 spin_unlock(&cifs_tcp_ses_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001910 return NULL;
1911}
1912
Jeff Layton14fbf502008-11-14 13:53:46 -05001913static void
Steve French96daf2b2011-05-27 04:34:02 +00001914cifs_put_smb_ses(struct cifs_ses *ses)
Jeff Layton14fbf502008-11-14 13:53:46 -05001915{
1916 int xid;
1917 struct TCP_Server_Info *server = ses->server;
1918
Jeff Layton36988c72010-04-24 07:57:43 -04001919 cFYI(1, "%s: ses_count=%d\n", __func__, ses->ses_count);
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05301920 spin_lock(&cifs_tcp_ses_lock);
Jeff Layton14fbf502008-11-14 13:53:46 -05001921 if (--ses->ses_count > 0) {
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05301922 spin_unlock(&cifs_tcp_ses_lock);
Jeff Layton14fbf502008-11-14 13:53:46 -05001923 return;
1924 }
1925
1926 list_del_init(&ses->smb_ses_list);
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05301927 spin_unlock(&cifs_tcp_ses_lock);
Jeff Layton14fbf502008-11-14 13:53:46 -05001928
1929 if (ses->status == CifsGood) {
1930 xid = GetXid();
1931 CIFSSMBLogoff(xid, ses);
1932 _FreeXid(xid);
1933 }
1934 sesInfoFree(ses);
1935 cifs_put_tcp_session(server);
1936}
1937
Steve Frenchd9b94202011-04-12 01:24:57 +00001938static bool warned_on_ntlm; /* globals init to false automatically */
1939
Steve French96daf2b2011-05-27 04:34:02 +00001940static struct cifs_ses *
Jeff Layton36988c72010-04-24 07:57:43 -04001941cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info)
1942{
1943 int rc = -ENOMEM, xid;
Steve French96daf2b2011-05-27 04:34:02 +00001944 struct cifs_ses *ses;
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03001945 struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr;
1946 struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr;
Jeff Layton36988c72010-04-24 07:57:43 -04001947
1948 xid = GetXid();
1949
Jeff Layton4ff67b72010-07-06 20:43:02 -04001950 ses = cifs_find_smb_ses(server, volume_info);
Jeff Layton36988c72010-04-24 07:57:43 -04001951 if (ses) {
1952 cFYI(1, "Existing smb sess found (status=%d)", ses->status);
1953
Jeff Layton36988c72010-04-24 07:57:43 -04001954 mutex_lock(&ses->session_mutex);
Jeff Layton198b5682010-04-24 07:57:48 -04001955 rc = cifs_negotiate_protocol(xid, ses);
1956 if (rc) {
1957 mutex_unlock(&ses->session_mutex);
1958 /* problem -- put our ses reference */
1959 cifs_put_smb_ses(ses);
1960 FreeXid(xid);
1961 return ERR_PTR(rc);
1962 }
Jeff Layton36988c72010-04-24 07:57:43 -04001963 if (ses->need_reconnect) {
1964 cFYI(1, "Session needs reconnect");
1965 rc = cifs_setup_session(xid, ses,
1966 volume_info->local_nls);
1967 if (rc) {
1968 mutex_unlock(&ses->session_mutex);
1969 /* problem -- put our reference */
1970 cifs_put_smb_ses(ses);
1971 FreeXid(xid);
1972 return ERR_PTR(rc);
1973 }
1974 }
1975 mutex_unlock(&ses->session_mutex);
Jeff Layton460cf342010-09-14 11:38:24 -04001976
1977 /* existing SMB ses has a server reference already */
1978 cifs_put_tcp_session(server);
Jeff Layton36988c72010-04-24 07:57:43 -04001979 FreeXid(xid);
1980 return ses;
1981 }
1982
1983 cFYI(1, "Existing smb sess not found");
1984 ses = sesInfoAlloc();
1985 if (ses == NULL)
1986 goto get_ses_fail;
1987
1988 /* new SMB session uses our server ref */
1989 ses->server = server;
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03001990 if (server->dstaddr.ss_family == AF_INET6)
1991 sprintf(ses->serverName, "%pI6", &addr6->sin6_addr);
Jeff Layton36988c72010-04-24 07:57:43 -04001992 else
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03001993 sprintf(ses->serverName, "%pI4", &addr->sin_addr);
Jeff Layton36988c72010-04-24 07:57:43 -04001994
Steve French8727c8a2011-02-25 01:11:56 -06001995 if (volume_info->username) {
1996 ses->user_name = kstrdup(volume_info->username, GFP_KERNEL);
1997 if (!ses->user_name)
1998 goto get_ses_fail;
1999 }
Jeff Layton36988c72010-04-24 07:57:43 -04002000
2001 /* volume_info->password freed at unmount */
2002 if (volume_info->password) {
2003 ses->password = kstrdup(volume_info->password, GFP_KERNEL);
2004 if (!ses->password)
2005 goto get_ses_fail;
2006 }
2007 if (volume_info->domainname) {
Shirish Pargaonkard3686d52010-10-28 09:53:07 -05002008 ses->domainName = kstrdup(volume_info->domainname, GFP_KERNEL);
2009 if (!ses->domainName)
2010 goto get_ses_fail;
Jeff Layton36988c72010-04-24 07:57:43 -04002011 }
Jeff Layton3e4b3e12010-07-19 18:00:17 -04002012 ses->cred_uid = volume_info->cred_uid;
Jeff Layton36988c72010-04-24 07:57:43 -04002013 ses->linux_uid = volume_info->linux_uid;
Steve Frenchd9b94202011-04-12 01:24:57 +00002014
2015 /* ntlmv2 is much stronger than ntlm security, and has been broadly
2016 supported for many years, time to update default security mechanism */
2017 if ((volume_info->secFlg == 0) && warned_on_ntlm == false) {
2018 warned_on_ntlm = true;
2019 cERROR(1, "default security mechanism requested. The default "
2020 "security mechanism will be upgraded from ntlm to "
Suresh Jayaramanc592a702011-06-03 12:06:19 +05302021 "ntlmv2 in kernel release 3.1");
Steve Frenchd9b94202011-04-12 01:24:57 +00002022 }
Jeff Layton36988c72010-04-24 07:57:43 -04002023 ses->overrideSecFlg = volume_info->secFlg;
2024
2025 mutex_lock(&ses->session_mutex);
Jeff Layton198b5682010-04-24 07:57:48 -04002026 rc = cifs_negotiate_protocol(xid, ses);
2027 if (!rc)
2028 rc = cifs_setup_session(xid, ses, volume_info->local_nls);
Jeff Layton36988c72010-04-24 07:57:43 -04002029 mutex_unlock(&ses->session_mutex);
Steve Frenchc8e56f12010-09-08 21:10:58 +00002030 if (rc)
Jeff Layton36988c72010-04-24 07:57:43 -04002031 goto get_ses_fail;
2032
2033 /* success, put it on the list */
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302034 spin_lock(&cifs_tcp_ses_lock);
Jeff Layton36988c72010-04-24 07:57:43 -04002035 list_add(&ses->smb_ses_list, &server->smb_ses_list);
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302036 spin_unlock(&cifs_tcp_ses_lock);
Jeff Layton36988c72010-04-24 07:57:43 -04002037
2038 FreeXid(xid);
2039 return ses;
2040
2041get_ses_fail:
2042 sesInfoFree(ses);
2043 FreeXid(xid);
2044 return ERR_PTR(rc);
2045}
2046
Steve French96daf2b2011-05-27 04:34:02 +00002047static int match_tcon(struct cifs_tcon *tcon, const char *unc)
Pavel Shilovsky37bb04e2011-05-05 09:55:11 +00002048{
2049 if (tcon->tidStatus == CifsExiting)
2050 return 0;
2051 if (strncmp(tcon->treeName, unc, MAX_TREE_SIZE))
2052 return 0;
2053 return 1;
2054}
2055
Steve French96daf2b2011-05-27 04:34:02 +00002056static struct cifs_tcon *
2057cifs_find_tcon(struct cifs_ses *ses, const char *unc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002058{
2059 struct list_head *tmp;
Steve French96daf2b2011-05-27 04:34:02 +00002060 struct cifs_tcon *tcon;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002061
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302062 spin_lock(&cifs_tcp_ses_lock);
Jeff Laytonf1987b42008-11-15 11:12:47 -05002063 list_for_each(tmp, &ses->tcon_list) {
Steve French96daf2b2011-05-27 04:34:02 +00002064 tcon = list_entry(tmp, struct cifs_tcon, tcon_list);
Pavel Shilovsky37bb04e2011-05-05 09:55:11 +00002065 if (!match_tcon(tcon, unc))
Jeff Laytonf1987b42008-11-15 11:12:47 -05002066 continue;
Jeff Laytonf1987b42008-11-15 11:12:47 -05002067 ++tcon->tc_count;
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302068 spin_unlock(&cifs_tcp_ses_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002069 return tcon;
2070 }
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302071 spin_unlock(&cifs_tcp_ses_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002072 return NULL;
2073}
2074
Jeff Laytonf1987b42008-11-15 11:12:47 -05002075static void
Steve French96daf2b2011-05-27 04:34:02 +00002076cifs_put_tcon(struct cifs_tcon *tcon)
Jeff Laytonf1987b42008-11-15 11:12:47 -05002077{
2078 int xid;
Steve French96daf2b2011-05-27 04:34:02 +00002079 struct cifs_ses *ses = tcon->ses;
Jeff Laytonf1987b42008-11-15 11:12:47 -05002080
Jeff Laytond00c28d2010-04-24 07:57:44 -04002081 cFYI(1, "%s: tc_count=%d\n", __func__, tcon->tc_count);
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302082 spin_lock(&cifs_tcp_ses_lock);
Jeff Laytonf1987b42008-11-15 11:12:47 -05002083 if (--tcon->tc_count > 0) {
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302084 spin_unlock(&cifs_tcp_ses_lock);
Jeff Laytonf1987b42008-11-15 11:12:47 -05002085 return;
2086 }
2087
2088 list_del_init(&tcon->tcon_list);
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302089 spin_unlock(&cifs_tcp_ses_lock);
Jeff Laytonf1987b42008-11-15 11:12:47 -05002090
2091 xid = GetXid();
2092 CIFSSMBTDis(xid, tcon);
2093 _FreeXid(xid);
2094
Suresh Jayaramand03382c2010-07-05 18:12:27 +05302095 cifs_fscache_release_super_cookie(tcon);
Steve French9f841592010-07-23 20:37:53 +00002096 tconInfoFree(tcon);
Jeff Laytonf1987b42008-11-15 11:12:47 -05002097 cifs_put_smb_ses(ses);
2098}
2099
Steve French96daf2b2011-05-27 04:34:02 +00002100static struct cifs_tcon *
2101cifs_get_tcon(struct cifs_ses *ses, struct smb_vol *volume_info)
Jeff Laytond00c28d2010-04-24 07:57:44 -04002102{
2103 int rc, xid;
Steve French96daf2b2011-05-27 04:34:02 +00002104 struct cifs_tcon *tcon;
Jeff Laytond00c28d2010-04-24 07:57:44 -04002105
2106 tcon = cifs_find_tcon(ses, volume_info->UNC);
2107 if (tcon) {
2108 cFYI(1, "Found match on UNC path");
2109 /* existing tcon already has a reference */
2110 cifs_put_smb_ses(ses);
2111 if (tcon->seal != volume_info->seal)
2112 cERROR(1, "transport encryption setting "
2113 "conflicts with existing tid");
2114 return tcon;
2115 }
2116
2117 tcon = tconInfoAlloc();
2118 if (tcon == NULL) {
2119 rc = -ENOMEM;
2120 goto out_fail;
2121 }
2122
2123 tcon->ses = ses;
2124 if (volume_info->password) {
2125 tcon->password = kstrdup(volume_info->password, GFP_KERNEL);
2126 if (!tcon->password) {
2127 rc = -ENOMEM;
2128 goto out_fail;
2129 }
2130 }
2131
2132 if (strchr(volume_info->UNC + 3, '\\') == NULL
2133 && strchr(volume_info->UNC + 3, '/') == NULL) {
2134 cERROR(1, "Missing share name");
2135 rc = -ENODEV;
2136 goto out_fail;
2137 }
2138
2139 /* BB Do we need to wrap session_mutex around
2140 * this TCon call and Unix SetFS as
2141 * we do on SessSetup and reconnect? */
2142 xid = GetXid();
2143 rc = CIFSTCon(xid, ses, volume_info->UNC, tcon, volume_info->local_nls);
2144 FreeXid(xid);
2145 cFYI(1, "CIFS Tcon rc = %d", rc);
2146 if (rc)
2147 goto out_fail;
2148
2149 if (volume_info->nodfs) {
2150 tcon->Flags &= ~SMB_SHARE_IS_IN_DFS;
2151 cFYI(1, "DFS disabled (%d)", tcon->Flags);
2152 }
2153 tcon->seal = volume_info->seal;
2154 /* we can have only one retry value for a connection
2155 to a share so for resources mounted more than once
2156 to the same server share the last value passed in
2157 for the retry flag is used */
2158 tcon->retry = volume_info->retry;
2159 tcon->nocase = volume_info->nocase;
2160 tcon->local_lease = volume_info->local_lease;
2161
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302162 spin_lock(&cifs_tcp_ses_lock);
Jeff Laytond00c28d2010-04-24 07:57:44 -04002163 list_add(&tcon->tcon_list, &ses->tcon_list);
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302164 spin_unlock(&cifs_tcp_ses_lock);
Jeff Laytond00c28d2010-04-24 07:57:44 -04002165
Suresh Jayaramand03382c2010-07-05 18:12:27 +05302166 cifs_fscache_get_super_cookie(tcon);
2167
Jeff Laytond00c28d2010-04-24 07:57:44 -04002168 return tcon;
2169
2170out_fail:
2171 tconInfoFree(tcon);
2172 return ERR_PTR(rc);
2173}
2174
Jeff Layton9d002df2010-10-06 19:51:11 -04002175void
2176cifs_put_tlink(struct tcon_link *tlink)
2177{
2178 if (!tlink || IS_ERR(tlink))
2179 return;
2180
2181 if (!atomic_dec_and_test(&tlink->tl_count) ||
2182 test_bit(TCON_LINK_IN_TREE, &tlink->tl_flags)) {
2183 tlink->tl_time = jiffies;
2184 return;
2185 }
2186
2187 if (!IS_ERR(tlink_tcon(tlink)))
2188 cifs_put_tcon(tlink_tcon(tlink));
2189 kfree(tlink);
2190 return;
2191}
Jeff Laytond00c28d2010-04-24 07:57:44 -04002192
Pavel Shilovsky25c7f412011-05-26 23:35:47 +04002193static inline struct tcon_link *
Pavel Shilovskycd518752011-06-09 12:58:53 +04002194cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb)
2195{
2196 return cifs_sb->master_tlink;
2197}
Pavel Shilovsky25c7f412011-05-26 23:35:47 +04002198
2199static int
2200compare_mount_options(struct super_block *sb, struct cifs_mnt_data *mnt_data)
2201{
2202 struct cifs_sb_info *old = CIFS_SB(sb);
2203 struct cifs_sb_info *new = mnt_data->cifs_sb;
2204
2205 if ((sb->s_flags & CIFS_MS_MASK) != (mnt_data->flags & CIFS_MS_MASK))
2206 return 0;
2207
2208 if ((old->mnt_cifs_flags & CIFS_MOUNT_MASK) !=
2209 (new->mnt_cifs_flags & CIFS_MOUNT_MASK))
2210 return 0;
2211
2212 if (old->rsize != new->rsize)
2213 return 0;
2214
2215 /*
2216 * We want to share sb only if we don't specify wsize or specified wsize
2217 * is greater or equal than existing one.
2218 */
2219 if (new->wsize && new->wsize < old->wsize)
2220 return 0;
2221
2222 if (old->mnt_uid != new->mnt_uid || old->mnt_gid != new->mnt_gid)
2223 return 0;
2224
2225 if (old->mnt_file_mode != new->mnt_file_mode ||
2226 old->mnt_dir_mode != new->mnt_dir_mode)
2227 return 0;
2228
2229 if (strcmp(old->local_nls->charset, new->local_nls->charset))
2230 return 0;
2231
2232 if (old->actimeo != new->actimeo)
2233 return 0;
2234
2235 return 1;
2236}
2237
2238int
2239cifs_match_super(struct super_block *sb, void *data)
2240{
2241 struct cifs_mnt_data *mnt_data = (struct cifs_mnt_data *)data;
2242 struct smb_vol *volume_info;
2243 struct cifs_sb_info *cifs_sb;
2244 struct TCP_Server_Info *tcp_srv;
Steve French96daf2b2011-05-27 04:34:02 +00002245 struct cifs_ses *ses;
2246 struct cifs_tcon *tcon;
Pavel Shilovsky25c7f412011-05-26 23:35:47 +04002247 struct tcon_link *tlink;
2248 struct sockaddr_storage addr;
2249 int rc = 0;
2250
2251 memset(&addr, 0, sizeof(struct sockaddr_storage));
2252
2253 spin_lock(&cifs_tcp_ses_lock);
2254 cifs_sb = CIFS_SB(sb);
2255 tlink = cifs_get_tlink(cifs_sb_master_tlink(cifs_sb));
2256 if (IS_ERR(tlink)) {
2257 spin_unlock(&cifs_tcp_ses_lock);
2258 return rc;
2259 }
2260 tcon = tlink_tcon(tlink);
2261 ses = tcon->ses;
2262 tcp_srv = ses->server;
2263
2264 volume_info = mnt_data->vol;
2265
2266 if (!volume_info->UNCip || !volume_info->UNC)
2267 goto out;
2268
2269 rc = cifs_fill_sockaddr((struct sockaddr *)&addr,
2270 volume_info->UNCip,
2271 strlen(volume_info->UNCip),
2272 volume_info->port);
2273 if (!rc)
2274 goto out;
2275
2276 if (!match_server(tcp_srv, (struct sockaddr *)&addr, volume_info) ||
2277 !match_session(ses, volume_info) ||
2278 !match_tcon(tcon, volume_info->UNC)) {
2279 rc = 0;
2280 goto out;
2281 }
2282
2283 rc = compare_mount_options(sb, mnt_data);
2284out:
Pavel Shilovsky25c7f412011-05-26 23:35:47 +04002285 spin_unlock(&cifs_tcp_ses_lock);
Jeff Laytonf484b5d02011-07-11 10:16:34 -04002286 cifs_put_tlink(tlink);
Pavel Shilovsky25c7f412011-05-26 23:35:47 +04002287 return rc;
2288}
2289
Linus Torvalds1da177e2005-04-16 15:20:36 -07002290int
Steve French96daf2b2011-05-27 04:34:02 +00002291get_dfs_path(int xid, struct cifs_ses *pSesInfo, const char *old_path,
Steve French50c2f752007-07-13 00:33:32 +00002292 const struct nls_table *nls_codepage, unsigned int *pnum_referrals,
Steve French366781c2008-01-25 10:12:41 +00002293 struct dfs_info3_param **preferrals, int remap)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002294{
2295 char *temp_unc;
2296 int rc = 0;
2297
2298 *pnum_referrals = 0;
Steve French366781c2008-01-25 10:12:41 +00002299 *preferrals = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002300
2301 if (pSesInfo->ipc_tid == 0) {
2302 temp_unc = kmalloc(2 /* for slashes */ +
Steve French50c2f752007-07-13 00:33:32 +00002303 strnlen(pSesInfo->serverName,
2304 SERVER_NAME_LEN_WITH_NULL * 2)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002305 + 1 + 4 /* slash IPC$ */ + 2,
2306 GFP_KERNEL);
2307 if (temp_unc == NULL)
2308 return -ENOMEM;
2309 temp_unc[0] = '\\';
2310 temp_unc[1] = '\\';
2311 strcpy(temp_unc + 2, pSesInfo->serverName);
2312 strcpy(temp_unc + 2 + strlen(pSesInfo->serverName), "\\IPC$");
2313 rc = CIFSTCon(xid, pSesInfo, temp_unc, NULL, nls_codepage);
Joe Perchesb6b38f72010-04-21 03:50:45 +00002314 cFYI(1, "CIFS Tcon rc = %d ipc_tid = %d", rc, pSesInfo->ipc_tid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002315 kfree(temp_unc);
2316 }
2317 if (rc == 0)
Steve Frenchc2cf07d2008-05-15 06:20:02 +00002318 rc = CIFSGetDFSRefer(xid, pSesInfo, old_path, preferrals,
Steve French737b7582005-04-28 22:41:06 -07002319 pnum_referrals, nls_codepage, remap);
Steve French366781c2008-01-25 10:12:41 +00002320 /* BB map targetUNCs to dfs_info3 structures, here or
2321 in CIFSGetDFSRefer BB */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002322
2323 return rc;
2324}
2325
Jeff Layton09e50d52008-07-23 10:11:19 -04002326#ifdef CONFIG_DEBUG_LOCK_ALLOC
2327static struct lock_class_key cifs_key[2];
2328static struct lock_class_key cifs_slock_key[2];
2329
2330static inline void
2331cifs_reclassify_socket4(struct socket *sock)
2332{
2333 struct sock *sk = sock->sk;
2334 BUG_ON(sock_owned_by_user(sk));
2335 sock_lock_init_class_and_name(sk, "slock-AF_INET-CIFS",
2336 &cifs_slock_key[0], "sk_lock-AF_INET-CIFS", &cifs_key[0]);
2337}
2338
2339static inline void
2340cifs_reclassify_socket6(struct socket *sock)
2341{
2342 struct sock *sk = sock->sk;
2343 BUG_ON(sock_owned_by_user(sk));
2344 sock_lock_init_class_and_name(sk, "slock-AF_INET6-CIFS",
2345 &cifs_slock_key[1], "sk_lock-AF_INET6-CIFS", &cifs_key[1]);
2346}
2347#else
2348static inline void
2349cifs_reclassify_socket4(struct socket *sock)
2350{
2351}
2352
2353static inline void
2354cifs_reclassify_socket6(struct socket *sock)
2355{
2356}
2357#endif
2358
Linus Torvalds1da177e2005-04-16 15:20:36 -07002359/* See RFC1001 section 14 on representation of Netbios names */
Steve French50c2f752007-07-13 00:33:32 +00002360static void rfc1002mangle(char *target, char *source, unsigned int length)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002361{
Steve French50c2f752007-07-13 00:33:32 +00002362 unsigned int i, j;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002363
Steve French50c2f752007-07-13 00:33:32 +00002364 for (i = 0, j = 0; i < (length); i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002365 /* mask a nibble at a time and encode */
2366 target[j] = 'A' + (0x0F & (source[i] >> 4));
2367 target[j+1] = 'A' + (0x0F & source[i]);
Steve French50c2f752007-07-13 00:33:32 +00002368 j += 2;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002369 }
2370
2371}
2372
Ben Greear3eb9a882010-09-01 17:06:02 -07002373static int
2374bind_socket(struct TCP_Server_Info *server)
2375{
2376 int rc = 0;
2377 if (server->srcaddr.ss_family != AF_UNSPEC) {
2378 /* Bind to the specified local IP address */
2379 struct socket *socket = server->ssocket;
2380 rc = socket->ops->bind(socket,
2381 (struct sockaddr *) &server->srcaddr,
2382 sizeof(server->srcaddr));
2383 if (rc < 0) {
2384 struct sockaddr_in *saddr4;
2385 struct sockaddr_in6 *saddr6;
2386 saddr4 = (struct sockaddr_in *)&server->srcaddr;
2387 saddr6 = (struct sockaddr_in6 *)&server->srcaddr;
2388 if (saddr6->sin6_family == AF_INET6)
2389 cERROR(1, "cifs: "
2390 "Failed to bind to: %pI6c, error: %d\n",
2391 &saddr6->sin6_addr, rc);
2392 else
2393 cERROR(1, "cifs: "
2394 "Failed to bind to: %pI4, error: %d\n",
2395 &saddr4->sin_addr.s_addr, rc);
2396 }
2397 }
2398 return rc;
2399}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002400
2401static int
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002402ip_rfc1001_connect(struct TCP_Server_Info *server)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002403{
2404 int rc = 0;
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002405 /*
2406 * some servers require RFC1001 sessinit before sending
2407 * negprot - BB check reconnection in case where second
2408 * sessinit is sent but no second negprot
2409 */
2410 struct rfc1002_session_packet *ses_init_buf;
2411 struct smb_hdr *smb_buf;
2412 ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet),
2413 GFP_KERNEL);
2414 if (ses_init_buf) {
2415 ses_init_buf->trailer.session_req.called_len = 32;
2416
2417 if (server->server_RFC1001_name &&
2418 server->server_RFC1001_name[0] != 0)
2419 rfc1002mangle(ses_init_buf->trailer.
2420 session_req.called_name,
2421 server->server_RFC1001_name,
2422 RFC1001_NAME_LEN_WITH_NULL);
2423 else
2424 rfc1002mangle(ses_init_buf->trailer.
2425 session_req.called_name,
2426 DEFAULT_CIFS_CALLED_NAME,
2427 RFC1001_NAME_LEN_WITH_NULL);
2428
2429 ses_init_buf->trailer.session_req.calling_len = 32;
2430
2431 /*
2432 * calling name ends in null (byte 16) from old smb
2433 * convention.
2434 */
2435 if (server->workstation_RFC1001_name &&
2436 server->workstation_RFC1001_name[0] != 0)
2437 rfc1002mangle(ses_init_buf->trailer.
2438 session_req.calling_name,
2439 server->workstation_RFC1001_name,
2440 RFC1001_NAME_LEN_WITH_NULL);
2441 else
2442 rfc1002mangle(ses_init_buf->trailer.
2443 session_req.calling_name,
2444 "LINUX_CIFS_CLNT",
2445 RFC1001_NAME_LEN_WITH_NULL);
2446
2447 ses_init_buf->trailer.session_req.scope1 = 0;
2448 ses_init_buf->trailer.session_req.scope2 = 0;
2449 smb_buf = (struct smb_hdr *)ses_init_buf;
2450
2451 /* sizeof RFC1002_SESSION_REQUEST with no scope */
Steve Frenchbe8e3b02011-04-29 05:40:20 +00002452 smb_buf->smb_buf_length = cpu_to_be32(0x81000044);
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002453 rc = smb_send(server, smb_buf, 0x44);
2454 kfree(ses_init_buf);
2455 /*
2456 * RFC1001 layer in at least one server
2457 * requires very short break before negprot
2458 * presumably because not expecting negprot
2459 * to follow so fast. This is a simple
2460 * solution that works without
2461 * complicating the code and causes no
2462 * significant slowing down on mount
2463 * for everyone else
2464 */
2465 usleep_range(1000, 2000);
2466 }
2467 /*
2468 * else the negprot may still work without this
2469 * even though malloc failed
2470 */
2471
2472 return rc;
2473}
2474
2475static int
2476generic_ip_connect(struct TCP_Server_Info *server)
2477{
2478 int rc = 0;
Steve French6da97912011-03-13 18:55:55 +00002479 __be16 sport;
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002480 int slen, sfamily;
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002481 struct socket *socket = server->ssocket;
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002482 struct sockaddr *saddr;
2483
2484 saddr = (struct sockaddr *) &server->dstaddr;
2485
2486 if (server->dstaddr.ss_family == AF_INET6) {
2487 sport = ((struct sockaddr_in6 *) saddr)->sin6_port;
2488 slen = sizeof(struct sockaddr_in6);
2489 sfamily = AF_INET6;
2490 } else {
2491 sport = ((struct sockaddr_in *) saddr)->sin_port;
2492 slen = sizeof(struct sockaddr_in);
2493 sfamily = AF_INET;
2494 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002495
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002496 if (socket == NULL) {
Rob Landleyf1d0c992011-01-22 15:44:05 -06002497 rc = __sock_create(cifs_net_ns(server), sfamily, SOCK_STREAM,
2498 IPPROTO_TCP, &socket, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002499 if (rc < 0) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00002500 cERROR(1, "Error %d creating socket", rc);
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002501 server->ssocket = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002502 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002503 }
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002504
2505 /* BB other socket options to set KEEPALIVE, NODELAY? */
Joe Perchesb6b38f72010-04-21 03:50:45 +00002506 cFYI(1, "Socket created");
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002507 server->ssocket = socket;
2508 socket->sk->sk_allocation = GFP_NOFS;
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002509 if (sfamily == AF_INET6)
2510 cifs_reclassify_socket6(socket);
2511 else
2512 cifs_reclassify_socket4(socket);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002513 }
2514
Ben Greear3eb9a882010-09-01 17:06:02 -07002515 rc = bind_socket(server);
2516 if (rc < 0)
2517 return rc;
2518
Jeff Laytond5c56052008-12-01 18:42:33 -05002519 /*
2520 * Eventually check for other socket options to change from
2521 * the default. sock_setsockopt not used because it expects
2522 * user space buffer
2523 */
2524 socket->sk->sk_rcvtimeo = 7 * HZ;
Steve Frenchda505c32009-01-19 03:49:35 +00002525 socket->sk->sk_sndtimeo = 5 * HZ;
Steve French6a5fa2362010-01-01 01:28:43 +00002526
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002527 /* make the bufsizes depend on wsize/rsize and max requests */
2528 if (server->noautotune) {
2529 if (socket->sk->sk_sndbuf < (200 * 1024))
2530 socket->sk->sk_sndbuf = 200 * 1024;
2531 if (socket->sk->sk_rcvbuf < (140 * 1024))
2532 socket->sk->sk_rcvbuf = 140 * 1024;
2533 }
2534
Steve French6a5fa2362010-01-01 01:28:43 +00002535 if (server->tcp_nodelay) {
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002536 int val = 1;
Steve French6a5fa2362010-01-01 01:28:43 +00002537 rc = kernel_setsockopt(socket, SOL_TCP, TCP_NODELAY,
2538 (char *)&val, sizeof(val));
2539 if (rc)
Joe Perchesb6b38f72010-04-21 03:50:45 +00002540 cFYI(1, "set TCP_NODELAY socket option error %d", rc);
Steve French6a5fa2362010-01-01 01:28:43 +00002541 }
2542
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002543 cFYI(1, "sndbuf %d rcvbuf %d rcvtimeo 0x%lx",
2544 socket->sk->sk_sndbuf,
2545 socket->sk->sk_rcvbuf, socket->sk->sk_rcvtimeo);
2546
Jeff Laytonee1b3ea2011-06-21 07:18:26 -04002547 rc = socket->ops->connect(socket, saddr, slen, 0);
2548 if (rc < 0) {
2549 cFYI(1, "Error %d connecting to server", rc);
2550 sock_release(socket);
2551 server->ssocket = NULL;
2552 return rc;
2553 }
2554
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002555 if (sport == htons(RFC1001_PORT))
2556 rc = ip_rfc1001_connect(server);
Steve French50c2f752007-07-13 00:33:32 +00002557
Linus Torvalds1da177e2005-04-16 15:20:36 -07002558 return rc;
2559}
2560
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002561static int
2562ip_connect(struct TCP_Server_Info *server)
2563{
Steve French6da97912011-03-13 18:55:55 +00002564 __be16 *sport;
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002565 struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr;
2566 struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr;
2567
2568 if (server->dstaddr.ss_family == AF_INET6)
2569 sport = &addr6->sin6_port;
2570 else
2571 sport = &addr->sin_port;
2572
2573 if (*sport == 0) {
2574 int rc;
2575
2576 /* try with 445 port at first */
2577 *sport = htons(CIFS_PORT);
2578
2579 rc = generic_ip_connect(server);
2580 if (rc >= 0)
2581 return rc;
2582
2583 /* if it failed, try with 139 port */
2584 *sport = htons(RFC1001_PORT);
2585 }
2586
2587 return generic_ip_connect(server);
2588}
2589
Steve French96daf2b2011-05-27 04:34:02 +00002590void reset_cifs_unix_caps(int xid, struct cifs_tcon *tcon,
Al Viro2c6292a2011-06-17 09:05:48 -04002591 struct cifs_sb_info *cifs_sb, struct smb_vol *vol_info)
Steve French8af18972007-02-14 04:42:51 +00002592{
2593 /* if we are reconnecting then should we check to see if
2594 * any requested capabilities changed locally e.g. via
2595 * remount but we can not do much about it here
2596 * if they have (even if we could detect it by the following)
2597 * Perhaps we could add a backpointer to array of sb from tcon
2598 * or if we change to make all sb to same share the same
2599 * sb as NFS - then we only have one backpointer to sb.
2600 * What if we wanted to mount the server share twice once with
2601 * and once without posixacls or posix paths? */
2602 __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
Steve French50c2f752007-07-13 00:33:32 +00002603
Steve Frenchc18c8422007-07-18 23:21:09 +00002604 if (vol_info && vol_info->no_linux_ext) {
2605 tcon->fsUnixInfo.Capability = 0;
2606 tcon->unix_ext = 0; /* Unix Extensions disabled */
Joe Perchesb6b38f72010-04-21 03:50:45 +00002607 cFYI(1, "Linux protocol extensions disabled");
Steve Frenchc18c8422007-07-18 23:21:09 +00002608 return;
2609 } else if (vol_info)
2610 tcon->unix_ext = 1; /* Unix Extensions supported */
2611
2612 if (tcon->unix_ext == 0) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00002613 cFYI(1, "Unix extensions disabled so not set on reconnect");
Steve Frenchc18c8422007-07-18 23:21:09 +00002614 return;
2615 }
Steve French50c2f752007-07-13 00:33:32 +00002616
Steve Frenchfb8c4b12007-07-10 01:16:18 +00002617 if (!CIFSSMBQFSUnixInfo(xid, tcon)) {
Steve French8af18972007-02-14 04:42:51 +00002618 __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
Steve French6848b732011-05-26 18:38:54 +00002619 cFYI(1, "unix caps which server supports %lld", cap);
Steve French8af18972007-02-14 04:42:51 +00002620 /* check for reconnect case in which we do not
2621 want to change the mount behavior if we can avoid it */
Steve Frenchfb8c4b12007-07-10 01:16:18 +00002622 if (vol_info == NULL) {
Steve French50c2f752007-07-13 00:33:32 +00002623 /* turn off POSIX ACL and PATHNAMES if not set
Steve French8af18972007-02-14 04:42:51 +00002624 originally at mount time */
2625 if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0)
2626 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
Igor Mammedov11b6d642008-02-15 19:06:04 +00002627 if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
2628 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
Joe Perchesb6b38f72010-04-21 03:50:45 +00002629 cERROR(1, "POSIXPATH support change");
Steve French8af18972007-02-14 04:42:51 +00002630 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
Igor Mammedov11b6d642008-02-15 19:06:04 +00002631 } else if ((cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00002632 cERROR(1, "possible reconnect error");
2633 cERROR(1, "server disabled POSIX path support");
Igor Mammedov11b6d642008-02-15 19:06:04 +00002634 }
Steve French8af18972007-02-14 04:42:51 +00002635 }
Steve French50c2f752007-07-13 00:33:32 +00002636
Steve French6848b732011-05-26 18:38:54 +00002637 if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)
2638 cERROR(1, "per-share encryption not supported yet");
2639
Steve French8af18972007-02-14 04:42:51 +00002640 cap &= CIFS_UNIX_CAP_MASK;
Steve French75865f8c2007-06-24 18:30:48 +00002641 if (vol_info && vol_info->no_psx_acl)
Steve French8af18972007-02-14 04:42:51 +00002642 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
Steve French75865f8c2007-06-24 18:30:48 +00002643 else if (CIFS_UNIX_POSIX_ACL_CAP & cap) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00002644 cFYI(1, "negotiated posix acl support");
Al Viro2c6292a2011-06-17 09:05:48 -04002645 if (cifs_sb)
2646 cifs_sb->mnt_cifs_flags |=
2647 CIFS_MOUNT_POSIXACL;
Steve French8af18972007-02-14 04:42:51 +00002648 }
2649
Steve French75865f8c2007-06-24 18:30:48 +00002650 if (vol_info && vol_info->posix_paths == 0)
Steve French8af18972007-02-14 04:42:51 +00002651 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
Steve French75865f8c2007-06-24 18:30:48 +00002652 else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00002653 cFYI(1, "negotiate posix pathnames");
Al Viro2c6292a2011-06-17 09:05:48 -04002654 if (cifs_sb)
2655 cifs_sb->mnt_cifs_flags |=
Steve French8af18972007-02-14 04:42:51 +00002656 CIFS_MOUNT_POSIX_PATHS;
2657 }
Steve French50c2f752007-07-13 00:33:32 +00002658
Al Viro2c6292a2011-06-17 09:05:48 -04002659 if (cifs_sb && (cifs_sb->rsize > 127 * 1024)) {
Steve French75865f8c2007-06-24 18:30:48 +00002660 if ((cap & CIFS_UNIX_LARGE_READ_CAP) == 0) {
Al Viro2c6292a2011-06-17 09:05:48 -04002661 cifs_sb->rsize = 127 * 1024;
Joe Perchesb6b38f72010-04-21 03:50:45 +00002662 cFYI(DBG2, "larger reads not supported by srv");
Steve French75865f8c2007-06-24 18:30:48 +00002663 }
2664 }
Steve French50c2f752007-07-13 00:33:32 +00002665
2666
Joe Perchesb6b38f72010-04-21 03:50:45 +00002667 cFYI(1, "Negotiate caps 0x%x", (int)cap);
Steve French8af18972007-02-14 04:42:51 +00002668#ifdef CONFIG_CIFS_DEBUG2
Steve French75865f8c2007-06-24 18:30:48 +00002669 if (cap & CIFS_UNIX_FCNTL_CAP)
Joe Perchesb6b38f72010-04-21 03:50:45 +00002670 cFYI(1, "FCNTL cap");
Steve French75865f8c2007-06-24 18:30:48 +00002671 if (cap & CIFS_UNIX_EXTATTR_CAP)
Joe Perchesb6b38f72010-04-21 03:50:45 +00002672 cFYI(1, "EXTATTR cap");
Steve French75865f8c2007-06-24 18:30:48 +00002673 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
Joe Perchesb6b38f72010-04-21 03:50:45 +00002674 cFYI(1, "POSIX path cap");
Steve French75865f8c2007-06-24 18:30:48 +00002675 if (cap & CIFS_UNIX_XATTR_CAP)
Joe Perchesb6b38f72010-04-21 03:50:45 +00002676 cFYI(1, "XATTR cap");
Steve French75865f8c2007-06-24 18:30:48 +00002677 if (cap & CIFS_UNIX_POSIX_ACL_CAP)
Joe Perchesb6b38f72010-04-21 03:50:45 +00002678 cFYI(1, "POSIX ACL cap");
Steve French75865f8c2007-06-24 18:30:48 +00002679 if (cap & CIFS_UNIX_LARGE_READ_CAP)
Joe Perchesb6b38f72010-04-21 03:50:45 +00002680 cFYI(1, "very large read cap");
Steve French75865f8c2007-06-24 18:30:48 +00002681 if (cap & CIFS_UNIX_LARGE_WRITE_CAP)
Joe Perchesb6b38f72010-04-21 03:50:45 +00002682 cFYI(1, "very large write cap");
Steve French6848b732011-05-26 18:38:54 +00002683 if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_CAP)
2684 cFYI(1, "transport encryption cap");
2685 if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)
2686 cFYI(1, "mandatory transport encryption cap");
Steve French8af18972007-02-14 04:42:51 +00002687#endif /* CIFS_DEBUG2 */
2688 if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) {
Steve French442aa312007-09-24 20:25:46 +00002689 if (vol_info == NULL) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00002690 cFYI(1, "resetting capabilities failed");
Steve French442aa312007-09-24 20:25:46 +00002691 } else
Joe Perchesb6b38f72010-04-21 03:50:45 +00002692 cERROR(1, "Negotiating Unix capabilities "
Steve French5a44b312007-09-20 15:16:24 +00002693 "with the server failed. Consider "
2694 "mounting with the Unix Extensions\n"
2695 "disabled, if problems are found, "
2696 "by specifying the nounix mount "
Joe Perchesb6b38f72010-04-21 03:50:45 +00002697 "option.");
Steve French5a44b312007-09-20 15:16:24 +00002698
Steve French8af18972007-02-14 04:42:51 +00002699 }
2700 }
2701}
2702
Pavel Shilovsky724d9f12011-05-05 09:55:12 +00002703void cifs_setup_cifs_sb(struct smb_vol *pvolume_info,
2704 struct cifs_sb_info *cifs_sb)
Jeff Laytonb1c8d2b2008-10-22 13:57:07 -04002705{
Jeff Layton2de970f2010-10-06 19:51:12 -04002706 INIT_DELAYED_WORK(&cifs_sb->prune_tlinks, cifs_prune_tlinks);
2707
Al Viro2ced6f62011-06-17 09:20:04 -04002708 spin_lock_init(&cifs_sb->tlink_tree_lock);
2709 cifs_sb->tlink_tree = RB_ROOT;
2710
Steve French3b795212008-11-13 19:45:32 +00002711 if (pvolume_info->rsize > CIFSMaxBufSize) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00002712 cERROR(1, "rsize %d too large, using MaxBufSize",
2713 pvolume_info->rsize);
Steve French3b795212008-11-13 19:45:32 +00002714 cifs_sb->rsize = CIFSMaxBufSize;
2715 } else if ((pvolume_info->rsize) &&
2716 (pvolume_info->rsize <= CIFSMaxBufSize))
2717 cifs_sb->rsize = pvolume_info->rsize;
2718 else /* default */
2719 cifs_sb->rsize = CIFSMaxBufSize;
Jeff Laytonb1c8d2b2008-10-22 13:57:07 -04002720
Steve French3b795212008-11-13 19:45:32 +00002721 if (cifs_sb->rsize < 2048) {
2722 cifs_sb->rsize = 2048;
2723 /* Windows ME may prefer this */
Joe Perchesb6b38f72010-04-21 03:50:45 +00002724 cFYI(1, "readsize set to minimum: 2048");
Steve French3b795212008-11-13 19:45:32 +00002725 }
Pavel Shilovsky25c7f412011-05-26 23:35:47 +04002726
2727 /*
2728 * Temporarily set wsize for matching superblock. If we end up using
2729 * new sb then cifs_negotiate_wsize will later negotiate it downward
2730 * if needed.
2731 */
2732 cifs_sb->wsize = pvolume_info->wsize;
2733
Steve French3b795212008-11-13 19:45:32 +00002734 cifs_sb->mnt_uid = pvolume_info->linux_uid;
2735 cifs_sb->mnt_gid = pvolume_info->linux_gid;
2736 cifs_sb->mnt_file_mode = pvolume_info->file_mode;
2737 cifs_sb->mnt_dir_mode = pvolume_info->dir_mode;
Joe Perchesb6b38f72010-04-21 03:50:45 +00002738 cFYI(1, "file mode: 0x%x dir mode: 0x%x",
2739 cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode);
Steve French3b795212008-11-13 19:45:32 +00002740
Suresh Jayaraman6d20e842010-12-01 14:42:28 +05302741 cifs_sb->actimeo = pvolume_info->actimeo;
Pavel Shilovsky724d9f12011-05-05 09:55:12 +00002742 cifs_sb->local_nls = pvolume_info->local_nls;
Suresh Jayaraman6d20e842010-12-01 14:42:28 +05302743
Steve French3b795212008-11-13 19:45:32 +00002744 if (pvolume_info->noperm)
2745 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM;
2746 if (pvolume_info->setuids)
2747 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID;
2748 if (pvolume_info->server_ino)
2749 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM;
2750 if (pvolume_info->remap)
2751 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR;
2752 if (pvolume_info->no_xattr)
2753 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR;
2754 if (pvolume_info->sfu_emul)
2755 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL;
2756 if (pvolume_info->nobrl)
2757 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL;
Steve Frenchbe652442009-02-23 15:21:59 +00002758 if (pvolume_info->nostrictsync)
Steve French4717bed2009-02-24 14:44:19 +00002759 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOSSYNC;
Steve French13a6e422008-12-02 17:24:33 +00002760 if (pvolume_info->mand_lock)
2761 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL;
Pavel Shilovskyd4ffff12011-05-26 06:02:00 +00002762 if (pvolume_info->rwpidforward)
2763 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_RWPIDFORWARD;
Steve French3b795212008-11-13 19:45:32 +00002764 if (pvolume_info->cifs_acl)
2765 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL;
2766 if (pvolume_info->override_uid)
2767 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID;
2768 if (pvolume_info->override_gid)
2769 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID;
2770 if (pvolume_info->dynperm)
2771 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM;
Suresh Jayaramanfa1df752010-07-05 18:13:36 +05302772 if (pvolume_info->fsc)
2773 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_FSCACHE;
Jeff Layton0eb8a132010-10-06 19:51:12 -04002774 if (pvolume_info->multiuser)
2775 cifs_sb->mnt_cifs_flags |= (CIFS_MOUNT_MULTIUSER |
2776 CIFS_MOUNT_NO_PERM);
Pavel Shilovskyd39454f2011-01-24 14:16:35 -05002777 if (pvolume_info->strict_io)
2778 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_STRICT_IO;
Steve French3b795212008-11-13 19:45:32 +00002779 if (pvolume_info->direct_io) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00002780 cFYI(1, "mounting share using direct i/o");
Steve French3b795212008-11-13 19:45:32 +00002781 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO;
2782 }
Stefan Metzmacher736a3322010-07-30 14:56:00 +02002783 if (pvolume_info->mfsymlinks) {
2784 if (pvolume_info->sfu_emul) {
2785 cERROR(1, "mount option mfsymlinks ignored if sfu "
2786 "mount option is used");
2787 } else {
2788 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MF_SYMLINKS;
2789 }
2790 }
Steve French3b795212008-11-13 19:45:32 +00002791
2792 if ((pvolume_info->cifs_acl) && (pvolume_info->dynperm))
Joe Perchesb6b38f72010-04-21 03:50:45 +00002793 cERROR(1, "mount option dynperm ignored if cifsacl "
2794 "mount option supported");
Jeff Laytonb1c8d2b2008-10-22 13:57:07 -04002795}
2796
Jeff Laytonf7910cb2011-05-19 16:22:58 -04002797/*
2798 * When the server supports very large writes via POSIX extensions, we can
Jeff Layton1190f6a2011-06-22 17:33:57 -04002799 * allow up to 2^24-1, minus the size of a WRITE_AND_X header, not including
2800 * the RFC1001 length.
Jeff Laytonf7910cb2011-05-19 16:22:58 -04002801 *
2802 * Note that this might make for "interesting" allocation problems during
Jeff Layton1190f6a2011-06-22 17:33:57 -04002803 * writeback however as we have to allocate an array of pointers for the
2804 * pages. A 16M write means ~32kb page array with PAGE_CACHE_SIZE == 4096.
Jeff Laytonf7910cb2011-05-19 16:22:58 -04002805 */
Jeff Layton1190f6a2011-06-22 17:33:57 -04002806#define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4)
Jeff Laytonf7910cb2011-05-19 16:22:58 -04002807
2808/*
Jeff Layton1190f6a2011-06-22 17:33:57 -04002809 * When the server doesn't allow large posix writes, only allow a wsize of
2810 * 128k minus the size of the WRITE_AND_X header. That allows for a write up
2811 * to the maximum size described by RFC1002.
Jeff Laytonf7910cb2011-05-19 16:22:58 -04002812 */
Jeff Layton1190f6a2011-06-22 17:33:57 -04002813#define CIFS_MAX_RFC1002_WSIZE (128 * 1024 - sizeof(WRITE_REQ) + 4)
Jeff Laytonf7910cb2011-05-19 16:22:58 -04002814
2815/*
2816 * The default wsize is 1M. find_get_pages seems to return a maximum of 256
2817 * pages in a single call. With PAGE_CACHE_SIZE == 4k, this means we can fill
2818 * a single wsize request with a single call.
2819 */
2820#define CIFS_DEFAULT_WSIZE (1024 * 1024)
2821
2822static unsigned int
Steve French96daf2b2011-05-27 04:34:02 +00002823cifs_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *pvolume_info)
Jeff Laytonf7910cb2011-05-19 16:22:58 -04002824{
2825 __u64 unix_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
2826 struct TCP_Server_Info *server = tcon->ses->server;
2827 unsigned int wsize = pvolume_info->wsize ? pvolume_info->wsize :
2828 CIFS_DEFAULT_WSIZE;
2829
2830 /* can server support 24-bit write sizes? (via UNIX extensions) */
2831 if (!tcon->unix_ext || !(unix_cap & CIFS_UNIX_LARGE_WRITE_CAP))
Jeff Layton1190f6a2011-06-22 17:33:57 -04002832 wsize = min_t(unsigned int, wsize, CIFS_MAX_RFC1002_WSIZE);
Jeff Laytonf7910cb2011-05-19 16:22:58 -04002833
Jeff Layton1190f6a2011-06-22 17:33:57 -04002834 /*
2835 * no CAP_LARGE_WRITE_X or is signing enabled without CAP_UNIX set?
2836 * Limit it to max buffer offered by the server, minus the size of the
2837 * WRITEX header, not including the 4 byte RFC1001 length.
2838 */
2839 if (!(server->capabilities & CAP_LARGE_WRITE_X) ||
2840 (!(server->capabilities & CAP_UNIX) &&
2841 (server->sec_mode & (SECMODE_SIGN_ENABLED|SECMODE_SIGN_REQUIRED))))
2842 wsize = min_t(unsigned int, wsize,
2843 server->maxBuf - sizeof(WRITE_REQ) + 4);
Jeff Laytonf7910cb2011-05-19 16:22:58 -04002844
2845 /* hard limit of CIFS_MAX_WSIZE */
2846 wsize = min_t(unsigned int, wsize, CIFS_MAX_WSIZE);
2847
2848 return wsize;
2849}
2850
Igor Mammedove4cce942009-02-10 14:10:26 +03002851static int
Steve French96daf2b2011-05-27 04:34:02 +00002852is_path_accessible(int xid, struct cifs_tcon *tcon,
Igor Mammedove4cce942009-02-10 14:10:26 +03002853 struct cifs_sb_info *cifs_sb, const char *full_path)
2854{
2855 int rc;
Igor Mammedove4cce942009-02-10 14:10:26 +03002856 FILE_ALL_INFO *pfile_info;
2857
Igor Mammedove4cce942009-02-10 14:10:26 +03002858 pfile_info = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
2859 if (pfile_info == NULL)
2860 return -ENOMEM;
2861
2862 rc = CIFSSMBQPathInfo(xid, tcon, full_path, pfile_info,
2863 0 /* not legacy */, cifs_sb->local_nls,
2864 cifs_sb->mnt_cifs_flags &
2865 CIFS_MOUNT_MAP_SPECIAL_CHR);
Jeff Layton221d1d72011-05-17 06:40:30 -04002866
2867 if (rc == -EOPNOTSUPP || rc == -EINVAL)
2868 rc = SMBQueryInformation(xid, tcon, full_path, pfile_info,
2869 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
2870 CIFS_MOUNT_MAP_SPECIAL_CHR);
Igor Mammedove4cce942009-02-10 14:10:26 +03002871 kfree(pfile_info);
2872 return rc;
2873}
2874
Jeff Laytonb9bce2e2011-07-06 08:10:39 -04002875static void
2876cleanup_volume_info_contents(struct smb_vol *volume_info)
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002877{
Sean Finneyb9468452011-04-11 13:19:32 +00002878 kfree(volume_info->username);
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002879 kzfree(volume_info->password);
2880 kfree(volume_info->UNC);
Steve French13589c42011-08-18 04:41:55 +00002881 if (volume_info->UNCip != volume_info->UNC + 2)
2882 kfree(volume_info->UNCip);
Sean Finneyb9468452011-04-11 13:19:32 +00002883 kfree(volume_info->domainname);
2884 kfree(volume_info->iocharset);
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002885 kfree(volume_info->prepath);
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002886}
2887
Jeff Laytonb9bce2e2011-07-06 08:10:39 -04002888void
2889cifs_cleanup_volume_info(struct smb_vol *volume_info)
2890{
2891 if (!volume_info)
2892 return;
2893 cleanup_volume_info_contents(volume_info);
2894 kfree(volume_info);
2895}
2896
2897
Steve French2d6d5892009-04-09 00:36:44 +00002898#ifdef CONFIG_CIFS_DFS_UPCALL
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002899/* build_path_to_root returns full path to root when
2900 * we do not have an exiting connection (tcon) */
2901static char *
Jeff Laytonb2a0fa12011-07-06 08:10:36 -04002902build_unc_path_to_root(const struct smb_vol *vol,
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002903 const struct cifs_sb_info *cifs_sb)
2904{
Jeff Laytonb2a0fa12011-07-06 08:10:36 -04002905 char *full_path, *pos;
2906 unsigned int pplen = vol->prepath ? strlen(vol->prepath) : 0;
2907 unsigned int unc_len = strnlen(vol->UNC, MAX_TREE_SIZE + 1);
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002908
Jeff Laytonb2a0fa12011-07-06 08:10:36 -04002909 full_path = kmalloc(unc_len + pplen + 1, GFP_KERNEL);
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002910 if (full_path == NULL)
2911 return ERR_PTR(-ENOMEM);
2912
Jeff Laytonb2a0fa12011-07-06 08:10:36 -04002913 strncpy(full_path, vol->UNC, unc_len);
2914 pos = full_path + unc_len;
2915
2916 if (pplen) {
2917 strncpy(pos, vol->prepath, pplen);
2918 pos += pplen;
2919 }
2920
2921 *pos = '\0'; /* add trailing null */
Steve Frenchf87d39d2011-05-27 03:50:55 +00002922 convert_delimiter(full_path, CIFS_DIR_SEP(cifs_sb));
Jeff Laytonb2a0fa12011-07-06 08:10:36 -04002923 cFYI(1, "%s: full_path=%s", __func__, full_path);
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002924 return full_path;
2925}
Sean Finneydd613942011-04-11 13:19:30 +00002926
2927/*
2928 * Perform a dfs referral query for a share and (optionally) prefix
2929 *
Sean Finney046462a2011-04-11 13:19:33 +00002930 * If a referral is found, cifs_sb->mountdata will be (re-)allocated
2931 * to a string containing updated options for the submount. Otherwise it
2932 * will be left untouched.
Sean Finneydd613942011-04-11 13:19:30 +00002933 *
2934 * Returns the rc from get_dfs_path to the caller, which can be used to
2935 * determine whether there were referrals.
2936 */
2937static int
Steve French96daf2b2011-05-27 04:34:02 +00002938expand_dfs_referral(int xid, struct cifs_ses *pSesInfo,
Sean Finneydd613942011-04-11 13:19:30 +00002939 struct smb_vol *volume_info, struct cifs_sb_info *cifs_sb,
Sean Finney046462a2011-04-11 13:19:33 +00002940 int check_prefix)
Sean Finneydd613942011-04-11 13:19:30 +00002941{
2942 int rc;
2943 unsigned int num_referrals = 0;
2944 struct dfs_info3_param *referrals = NULL;
2945 char *full_path = NULL, *ref_path = NULL, *mdata = NULL;
2946
2947 full_path = build_unc_path_to_root(volume_info, cifs_sb);
2948 if (IS_ERR(full_path))
2949 return PTR_ERR(full_path);
2950
2951 /* For DFS paths, skip the first '\' of the UNC */
2952 ref_path = check_prefix ? full_path + 1 : volume_info->UNC + 1;
2953
2954 rc = get_dfs_path(xid, pSesInfo , ref_path, cifs_sb->local_nls,
2955 &num_referrals, &referrals,
2956 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
2957
2958 if (!rc && num_referrals > 0) {
2959 char *fake_devname = NULL;
2960
2961 mdata = cifs_compose_mount_options(cifs_sb->mountdata,
2962 full_path + 1, referrals,
2963 &fake_devname);
2964
2965 free_dfs_info_array(referrals, num_referrals);
Sean Finney046462a2011-04-11 13:19:33 +00002966
Sean Finneydd613942011-04-11 13:19:30 +00002967 if (IS_ERR(mdata)) {
2968 rc = PTR_ERR(mdata);
2969 mdata = NULL;
Jeff Laytonb9bce2e2011-07-06 08:10:39 -04002970 } else {
2971 cleanup_volume_info_contents(volume_info);
2972 memset(volume_info, '\0', sizeof(*volume_info));
2973 rc = cifs_setup_volume_info(volume_info, mdata,
2974 fake_devname);
Sean Finneydd613942011-04-11 13:19:30 +00002975 }
Jeff Laytonb9bce2e2011-07-06 08:10:39 -04002976 kfree(fake_devname);
2977 kfree(cifs_sb->mountdata);
Sean Finney046462a2011-04-11 13:19:33 +00002978 cifs_sb->mountdata = mdata;
Sean Finneydd613942011-04-11 13:19:30 +00002979 }
2980 kfree(full_path);
2981 return rc;
2982}
Steve French2d6d5892009-04-09 00:36:44 +00002983#endif
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04002984
Jeff Layton04db79b2011-07-06 08:10:38 -04002985static int
2986cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data,
2987 const char *devname)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002988{
Pavel Shilovsky724d9f12011-05-05 09:55:12 +00002989 int rc = 0;
Sean Finneydd613942011-04-11 13:19:30 +00002990
Jeff Layton04db79b2011-07-06 08:10:38 -04002991 if (cifs_parse_mount_options(mount_data, devname, volume_info))
2992 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002993
Jeff Layton7586b762008-12-01 18:41:49 -05002994 if (volume_info->nullauth) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00002995 cFYI(1, "null user");
Pavel Shilovsky446b23a2011-06-20 12:33:16 +04002996 volume_info->username = kzalloc(1, GFP_KERNEL);
Jeff Layton04db79b2011-07-06 08:10:38 -04002997 if (volume_info->username == NULL)
2998 return -ENOMEM;
Jeff Layton7586b762008-12-01 18:41:49 -05002999 } else if (volume_info->username) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003000 /* BB fixme parse for domain name here */
Joe Perchesb6b38f72010-04-21 03:50:45 +00003001 cFYI(1, "Username: %s", volume_info->username);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003002 } else {
Steve Frenchbf820672005-12-01 22:32:42 -08003003 cifserror("No username specified");
Steve French50c2f752007-07-13 00:33:32 +00003004 /* In userspace mount helper we can get user name from alternate
3005 locations such as env variables and files on disk */
Jeff Layton04db79b2011-07-06 08:10:38 -04003006 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003007 }
3008
Linus Torvalds1da177e2005-04-16 15:20:36 -07003009 /* this is needed for ASCII cp to Unicode converts */
Jeff Layton7586b762008-12-01 18:41:49 -05003010 if (volume_info->iocharset == NULL) {
Jeff Laytona5fc4ce2010-04-24 07:57:42 -04003011 /* load_nls_default cannot return null */
3012 volume_info->local_nls = load_nls_default();
Linus Torvalds1da177e2005-04-16 15:20:36 -07003013 } else {
Jeff Laytona5fc4ce2010-04-24 07:57:42 -04003014 volume_info->local_nls = load_nls(volume_info->iocharset);
3015 if (volume_info->local_nls == NULL) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00003016 cERROR(1, "CIFS mount error: iocharset %s not found",
3017 volume_info->iocharset);
Jeff Layton04db79b2011-07-06 08:10:38 -04003018 return -ELIBACC;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003019 }
3020 }
Pavel Shilovsky724d9f12011-05-05 09:55:12 +00003021
Pavel Shilovsky724d9f12011-05-05 09:55:12 +00003022 return rc;
Jeff Layton04db79b2011-07-06 08:10:38 -04003023}
3024
3025struct smb_vol *
3026cifs_get_volume_info(char *mount_data, const char *devname)
3027{
3028 int rc;
3029 struct smb_vol *volume_info;
3030
3031 volume_info = kzalloc(sizeof(struct smb_vol), GFP_KERNEL);
3032 if (!volume_info)
3033 return ERR_PTR(-ENOMEM);
3034
3035 rc = cifs_setup_volume_info(volume_info, mount_data, devname);
3036 if (rc) {
3037 cifs_cleanup_volume_info(volume_info);
3038 volume_info = ERR_PTR(rc);
3039 }
3040
3041 return volume_info;
Pavel Shilovsky724d9f12011-05-05 09:55:12 +00003042}
3043
3044int
Al Viro2c6292a2011-06-17 09:05:48 -04003045cifs_mount(struct cifs_sb_info *cifs_sb, struct smb_vol *volume_info)
Pavel Shilovsky724d9f12011-05-05 09:55:12 +00003046{
3047 int rc = 0;
3048 int xid;
Steve French96daf2b2011-05-27 04:34:02 +00003049 struct cifs_ses *pSesInfo;
3050 struct cifs_tcon *tcon;
Pavel Shilovsky724d9f12011-05-05 09:55:12 +00003051 struct TCP_Server_Info *srvTcp;
3052 char *full_path;
3053 struct tcon_link *tlink;
3054#ifdef CONFIG_CIFS_DFS_UPCALL
3055 int referral_walks_count = 0;
Jeff Layton20547492011-07-09 12:21:07 -04003056#endif
Al Virodd854462011-06-17 08:24:42 -04003057
3058 rc = bdi_setup_and_register(&cifs_sb->bdi, "cifs", BDI_CAP_MAP_COPY);
3059 if (rc)
3060 return rc;
3061
3062 cifs_sb->bdi.ra_pages = default_backing_dev_info.ra_pages;
3063
Jeff Layton20547492011-07-09 12:21:07 -04003064#ifdef CONFIG_CIFS_DFS_UPCALL
Pavel Shilovsky724d9f12011-05-05 09:55:12 +00003065try_mount_again:
3066 /* cleanup activities if we're chasing a referral */
3067 if (referral_walks_count) {
3068 if (tcon)
3069 cifs_put_tcon(tcon);
3070 else if (pSesInfo)
3071 cifs_put_smb_ses(pSesInfo);
3072
Pavel Shilovsky724d9f12011-05-05 09:55:12 +00003073 FreeXid(xid);
3074 }
3075#endif
3076 tcon = NULL;
3077 pSesInfo = NULL;
3078 srvTcp = NULL;
3079 full_path = NULL;
3080 tlink = NULL;
3081
3082 xid = GetXid();
Linus Torvalds1da177e2005-04-16 15:20:36 -07003083
Jeff Layton63c038c2008-12-01 18:41:46 -05003084 /* get a reference to a tcp session */
Jeff Layton7586b762008-12-01 18:41:49 -05003085 srvTcp = cifs_get_tcp_session(volume_info);
Jeff Layton63c038c2008-12-01 18:41:46 -05003086 if (IS_ERR(srvTcp)) {
3087 rc = PTR_ERR(srvTcp);
Al Virodd854462011-06-17 08:24:42 -04003088 bdi_destroy(&cifs_sb->bdi);
Jeff Layton63c038c2008-12-01 18:41:46 -05003089 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003090 }
3091
Jeff Layton36988c72010-04-24 07:57:43 -04003092 /* get a reference to a SMB session */
3093 pSesInfo = cifs_get_smb_ses(srvTcp, volume_info);
3094 if (IS_ERR(pSesInfo)) {
3095 rc = PTR_ERR(pSesInfo);
3096 pSesInfo = NULL;
3097 goto mount_fail_check;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003098 }
Steve French50c2f752007-07-13 00:33:32 +00003099
Jeff Laytond00c28d2010-04-24 07:57:44 -04003100 /* search for existing tcon to this server share */
3101 tcon = cifs_get_tcon(pSesInfo, volume_info);
3102 if (IS_ERR(tcon)) {
3103 rc = PTR_ERR(tcon);
3104 tcon = NULL;
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003105 goto remote_path_check;
Jeff Laytond00c28d2010-04-24 07:57:44 -04003106 }
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003107
Steve French6848b732011-05-26 18:38:54 +00003108 /* tell server which Unix caps we support */
3109 if (tcon->ses->capabilities & CAP_UNIX) {
3110 /* reset of caps checks mount to see if unix extensions
3111 disabled for just this mount */
Al Viro2c6292a2011-06-17 09:05:48 -04003112 reset_cifs_unix_caps(xid, tcon, cifs_sb, volume_info);
Steve French6848b732011-05-26 18:38:54 +00003113 if ((tcon->ses->server->tcpStatus == CifsNeedReconnect) &&
3114 (le64_to_cpu(tcon->fsUnixInfo.Capability) &
3115 CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)) {
3116 rc = -EACCES;
3117 goto mount_fail_check;
3118 }
3119 } else
3120 tcon->unix_ext = 0; /* server does not support them */
3121
Steve Frenchd82c2df2008-11-15 00:07:26 +00003122 /* do not care if following two calls succeed - informational */
3123 if (!tcon->ipc) {
3124 CIFSSMBQFSDeviceInfo(xid, tcon);
3125 CIFSSMBQFSAttributeInfo(xid, tcon);
3126 }
3127
Steve Frenchd82c2df2008-11-15 00:07:26 +00003128 if ((tcon->unix_ext == 0) && (cifs_sb->rsize > (1024 * 127))) {
3129 cifs_sb->rsize = 1024 * 127;
Joe Perchesb6b38f72010-04-21 03:50:45 +00003130 cFYI(DBG2, "no very large read support, rsize now 127K");
Steve Frenchd82c2df2008-11-15 00:07:26 +00003131 }
Steve Frenchd82c2df2008-11-15 00:07:26 +00003132 if (!(tcon->ses->capabilities & CAP_LARGE_READ_X))
3133 cifs_sb->rsize = min(cifs_sb->rsize,
3134 (tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003135
Jeff Laytonf7910cb2011-05-19 16:22:58 -04003136 cifs_sb->wsize = cifs_negotiate_wsize(tcon, volume_info);
3137
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003138remote_path_check:
Sean Finneyc1508ca2011-04-11 13:19:31 +00003139#ifdef CONFIG_CIFS_DFS_UPCALL
3140 /*
3141 * Perform an unconditional check for whether there are DFS
3142 * referrals for this path without prefix, to provide support
3143 * for DFS referrals from w2k8 servers which don't seem to respond
3144 * with PATH_NOT_COVERED to requests that include the prefix.
3145 * Chase the referral if found, otherwise continue normally.
3146 */
3147 if (referral_walks_count == 0) {
3148 int refrc = expand_dfs_referral(xid, pSesInfo, volume_info,
Sean Finney046462a2011-04-11 13:19:33 +00003149 cifs_sb, false);
Sean Finneyc1508ca2011-04-11 13:19:31 +00003150 if (!refrc) {
3151 referral_walks_count++;
3152 goto try_mount_again;
3153 }
3154 }
3155#endif
3156
Steve Frenchf87d39d2011-05-27 03:50:55 +00003157 /* check if a whole path is not remote */
Jeff Layton70945642011-03-14 13:48:08 -04003158 if (!rc && tcon) {
Igor Mammedove4cce942009-02-10 14:10:26 +03003159 /* build_path_to_root works only when we have a valid tcon */
Steve Frenchf87d39d2011-05-27 03:50:55 +00003160 full_path = cifs_build_path_to_root(volume_info, cifs_sb, tcon);
Igor Mammedove4cce942009-02-10 14:10:26 +03003161 if (full_path == NULL) {
3162 rc = -ENOMEM;
3163 goto mount_fail_check;
3164 }
3165 rc = is_path_accessible(xid, tcon, cifs_sb, full_path);
Jeff Layton03ceace2010-12-06 21:07:33 -05003166 if (rc != 0 && rc != -EREMOTE) {
Igor Mammedove4cce942009-02-10 14:10:26 +03003167 kfree(full_path);
3168 goto mount_fail_check;
3169 }
3170 kfree(full_path);
3171 }
3172
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003173 /* get referral if needed */
3174 if (rc == -EREMOTE) {
Steve Frenchd036f502009-04-03 03:12:08 +00003175#ifdef CONFIG_CIFS_DFS_UPCALL
Igor Mammedov5c2503a2009-04-21 19:31:05 +04003176 if (referral_walks_count > MAX_NESTED_LINKS) {
3177 /*
3178 * BB: when we implement proper loop detection,
3179 * we will remove this check. But now we need it
3180 * to prevent an indefinite loop if 'DFS tree' is
3181 * misconfigured (i.e. has loops).
3182 */
3183 rc = -ELOOP;
3184 goto mount_fail_check;
3185 }
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003186
Sean Finneydd613942011-04-11 13:19:30 +00003187 rc = expand_dfs_referral(xid, pSesInfo, volume_info, cifs_sb,
Sean Finney046462a2011-04-11 13:19:33 +00003188 true);
Jeff Layton7b91e262009-07-23 15:22:30 -04003189
Sean Finneydd613942011-04-11 13:19:30 +00003190 if (!rc) {
Igor Mammedov5c2503a2009-04-21 19:31:05 +04003191 referral_walks_count++;
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003192 goto try_mount_again;
3193 }
Sean Finneydd613942011-04-11 13:19:30 +00003194 goto mount_fail_check;
Steve Frenchd036f502009-04-03 03:12:08 +00003195#else /* No DFS support, return error on mount */
3196 rc = -EOPNOTSUPP;
3197#endif
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003198 }
3199
Jeff Layton9d002df2010-10-06 19:51:11 -04003200 if (rc)
3201 goto mount_fail_check;
3202
3203 /* now, hang the tcon off of the superblock */
3204 tlink = kzalloc(sizeof *tlink, GFP_KERNEL);
3205 if (tlink == NULL) {
3206 rc = -ENOMEM;
3207 goto mount_fail_check;
3208 }
3209
Jeff Laytonb647c352010-10-28 11:16:44 -04003210 tlink->tl_uid = pSesInfo->linux_uid;
Jeff Layton9d002df2010-10-06 19:51:11 -04003211 tlink->tl_tcon = tcon;
3212 tlink->tl_time = jiffies;
3213 set_bit(TCON_LINK_MASTER, &tlink->tl_flags);
3214 set_bit(TCON_LINK_IN_TREE, &tlink->tl_flags);
3215
Jeff Layton413e6612010-10-28 13:33:38 -04003216 cifs_sb->master_tlink = tlink;
Jeff Laytonb647c352010-10-28 11:16:44 -04003217 spin_lock(&cifs_sb->tlink_tree_lock);
3218 tlink_rb_insert(&cifs_sb->tlink_tree, tlink);
3219 spin_unlock(&cifs_sb->tlink_tree_lock);
Jeff Layton413e6612010-10-28 13:33:38 -04003220
Jeff Layton2de970f2010-10-06 19:51:12 -04003221 queue_delayed_work(system_nrt_wq, &cifs_sb->prune_tlinks,
3222 TLINK_IDLE_EXPIRE);
3223
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003224mount_fail_check:
3225 /* on error free sesinfo and tcon struct if needed */
3226 if (rc) {
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003227 /* If find_unc succeeded then rc == 0 so we can not end */
Lucas De Marchi25985ed2011-03-30 22:57:33 -03003228 /* up accidentally freeing someone elses tcon struct */
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003229 if (tcon)
3230 cifs_put_tcon(tcon);
3231 else if (pSesInfo)
3232 cifs_put_smb_ses(pSesInfo);
3233 else
3234 cifs_put_tcp_session(srvTcp);
Al Virodd854462011-06-17 08:24:42 -04003235 bdi_destroy(&cifs_sb->bdi);
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003236 }
3237
Jeff Layton70fe7dc2007-11-16 22:21:07 +00003238out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07003239 FreeXid(xid);
3240 return rc;
3241}
3242
Jeff Layton8d1bca32011-06-11 21:17:10 -04003243/*
3244 * Issue a TREE_CONNECT request. Note that for IPC$ shares, that the tcon
3245 * pointer may be NULL.
3246 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003247int
Steve French96daf2b2011-05-27 04:34:02 +00003248CIFSTCon(unsigned int xid, struct cifs_ses *ses,
3249 const char *tree, struct cifs_tcon *tcon,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003250 const struct nls_table *nls_codepage)
3251{
3252 struct smb_hdr *smb_buffer;
3253 struct smb_hdr *smb_buffer_response;
3254 TCONX_REQ *pSMB;
3255 TCONX_RSP *pSMBr;
3256 unsigned char *bcc_ptr;
3257 int rc = 0;
Jeff Layton690c5222011-01-20 13:36:51 -05003258 int length;
3259 __u16 bytes_left, count;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003260
3261 if (ses == NULL)
3262 return -EIO;
3263
3264 smb_buffer = cifs_buf_get();
Steve Frenchca43e3b2009-09-01 17:20:50 +00003265 if (smb_buffer == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003266 return -ENOMEM;
Steve Frenchca43e3b2009-09-01 17:20:50 +00003267
Linus Torvalds1da177e2005-04-16 15:20:36 -07003268 smb_buffer_response = smb_buffer;
3269
3270 header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX,
3271 NULL /*no tid */ , 4 /*wct */ );
Steve French1982c342005-08-17 12:38:22 -07003272
3273 smb_buffer->Mid = GetNextMid(ses->server);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003274 smb_buffer->Uid = ses->Suid;
3275 pSMB = (TCONX_REQ *) smb_buffer;
3276 pSMBr = (TCONX_RSP *) smb_buffer_response;
3277
3278 pSMB->AndXCommand = 0xFF;
3279 pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003280 bcc_ptr = &pSMB->Password[0];
Jeff Layton8d1bca32011-06-11 21:17:10 -04003281 if (!tcon || (ses->server->sec_mode & SECMODE_USER)) {
Steve Frencheeac8042006-01-13 21:34:58 -08003282 pSMB->PasswordLength = cpu_to_le16(1); /* minimum */
Steve French7c7b25b2006-06-01 19:20:10 +00003283 *bcc_ptr = 0; /* password is null byte */
Steve Frencheeac8042006-01-13 21:34:58 -08003284 bcc_ptr++; /* skip password */
Steve French7c7b25b2006-06-01 19:20:10 +00003285 /* already aligned so no need to do it below */
Steve Frencheeac8042006-01-13 21:34:58 -08003286 } else {
Shirish Pargaonkar540b2e32011-01-18 22:33:54 -06003287 pSMB->PasswordLength = cpu_to_le16(CIFS_AUTH_RESP_SIZE);
Steve Frencheeac8042006-01-13 21:34:58 -08003288 /* BB FIXME add code to fail this if NTLMv2 or Kerberos
3289 specified as required (when that support is added to
3290 the vfs in the future) as only NTLM or the much
Steve French7c7b25b2006-06-01 19:20:10 +00003291 weaker LANMAN (which we do not send by default) is accepted
Steve Frencheeac8042006-01-13 21:34:58 -08003292 by Samba (not sure whether other servers allow
3293 NTLMv2 password here) */
Steve French7c7b25b2006-06-01 19:20:10 +00003294#ifdef CONFIG_CIFS_WEAK_PW_HASH
Jeff Layton04912d62010-04-24 07:57:45 -04003295 if ((global_secflags & CIFSSEC_MAY_LANMAN) &&
Jeff Layton00e485b2008-12-05 20:41:21 -05003296 (ses->server->secType == LANMAN))
Shirish Pargaonkard3ba50b2010-10-27 15:20:36 -05003297 calc_lanman_hash(tcon->password, ses->server->cryptkey,
Steve French96daf2b2011-05-27 04:34:02 +00003298 ses->server->sec_mode &
Jeff Layton4e53a3f2008-12-05 20:41:21 -05003299 SECMODE_PW_ENCRYPT ? true : false,
3300 bcc_ptr);
Steve French7c7b25b2006-06-01 19:20:10 +00003301 else
3302#endif /* CIFS_WEAK_PW_HASH */
Shirish Pargaonkaree2c9252011-01-27 09:58:04 -06003303 rc = SMBNTencrypt(tcon->password, ses->server->cryptkey,
3304 bcc_ptr);
Steve Frencheeac8042006-01-13 21:34:58 -08003305
Shirish Pargaonkar540b2e32011-01-18 22:33:54 -06003306 bcc_ptr += CIFS_AUTH_RESP_SIZE;
Steve Frenchfb8c4b12007-07-10 01:16:18 +00003307 if (ses->capabilities & CAP_UNICODE) {
Steve French7c7b25b2006-06-01 19:20:10 +00003308 /* must align unicode strings */
3309 *bcc_ptr = 0; /* null byte password */
3310 bcc_ptr++;
3311 }
Steve Frencheeac8042006-01-13 21:34:58 -08003312 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003313
Steve French96daf2b2011-05-27 04:34:02 +00003314 if (ses->server->sec_mode &
Steve Frencha878fb22006-05-30 18:04:19 +00003315 (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003316 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
3317
3318 if (ses->capabilities & CAP_STATUS32) {
3319 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
3320 }
3321 if (ses->capabilities & CAP_DFS) {
3322 smb_buffer->Flags2 |= SMBFLG2_DFS;
3323 }
3324 if (ses->capabilities & CAP_UNICODE) {
3325 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
3326 length =
Steve French50c2f752007-07-13 00:33:32 +00003327 cifs_strtoUCS((__le16 *) bcc_ptr, tree,
3328 6 /* max utf8 char length in bytes */ *
Steve Frencha878fb22006-05-30 18:04:19 +00003329 (/* server len*/ + 256 /* share len */), nls_codepage);
3330 bcc_ptr += 2 * length; /* convert num 16 bit words to bytes */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003331 bcc_ptr += 2; /* skip trailing null */
3332 } else { /* ASCII */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003333 strcpy(bcc_ptr, tree);
3334 bcc_ptr += strlen(tree) + 1;
3335 }
3336 strcpy(bcc_ptr, "?????");
3337 bcc_ptr += strlen("?????");
3338 bcc_ptr += 1;
3339 count = bcc_ptr - &pSMB->Password[0];
Steve Frenchbe8e3b02011-04-29 05:40:20 +00003340 pSMB->hdr.smb_buf_length = cpu_to_be32(be32_to_cpu(
3341 pSMB->hdr.smb_buf_length) + count);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003342 pSMB->ByteCount = cpu_to_le16(count);
3343
Steve French133672e2007-11-13 22:41:37 +00003344 rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length,
Jeff Layton77499812011-01-11 07:24:23 -05003345 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003346
Linus Torvalds1da177e2005-04-16 15:20:36 -07003347 /* above now done in SendReceive */
3348 if ((rc == 0) && (tcon != NULL)) {
Steve French0e0d2cf2009-05-01 05:27:32 +00003349 bool is_unicode;
3350
Linus Torvalds1da177e2005-04-16 15:20:36 -07003351 tcon->tidStatus = CifsGood;
Steve French3b795212008-11-13 19:45:32 +00003352 tcon->need_reconnect = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003353 tcon->tid = smb_buffer_response->Tid;
3354 bcc_ptr = pByteArea(smb_buffer_response);
Jeff Layton690c5222011-01-20 13:36:51 -05003355 bytes_left = get_bcc(smb_buffer_response);
Jeff Laytoncc20c032009-04-30 07:16:21 -04003356 length = strnlen(bcc_ptr, bytes_left - 2);
Steve French0e0d2cf2009-05-01 05:27:32 +00003357 if (smb_buffer->Flags2 & SMBFLG2_UNICODE)
3358 is_unicode = true;
3359 else
3360 is_unicode = false;
3361
Jeff Laytoncc20c032009-04-30 07:16:21 -04003362
Steve French50c2f752007-07-13 00:33:32 +00003363 /* skip service field (NB: this field is always ASCII) */
Steve French7f8ed422007-09-28 22:28:55 +00003364 if (length == 3) {
3365 if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') &&
3366 (bcc_ptr[2] == 'C')) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00003367 cFYI(1, "IPC connection");
Steve French7f8ed422007-09-28 22:28:55 +00003368 tcon->ipc = 1;
3369 }
3370 } else if (length == 2) {
3371 if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) {
3372 /* the most common case */
Joe Perchesb6b38f72010-04-21 03:50:45 +00003373 cFYI(1, "disk share connection");
Steve French7f8ed422007-09-28 22:28:55 +00003374 }
3375 }
Steve French50c2f752007-07-13 00:33:32 +00003376 bcc_ptr += length + 1;
Jeff Laytoncc20c032009-04-30 07:16:21 -04003377 bytes_left -= (length + 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003378 strncpy(tcon->treeName, tree, MAX_TREE_SIZE);
Jeff Laytoncc20c032009-04-30 07:16:21 -04003379
3380 /* mostly informational -- no need to fail on error here */
Jeff Layton90a98b22009-07-20 13:40:52 -04003381 kfree(tcon->nativeFileSystem);
Steve Frenchd185cda2009-04-30 17:45:10 +00003382 tcon->nativeFileSystem = cifs_strndup_from_ucs(bcc_ptr,
Steve French0e0d2cf2009-05-01 05:27:32 +00003383 bytes_left, is_unicode,
Jeff Laytoncc20c032009-04-30 07:16:21 -04003384 nls_codepage);
3385
Joe Perchesb6b38f72010-04-21 03:50:45 +00003386 cFYI(1, "nativeFileSystem=%s", tcon->nativeFileSystem);
Jeff Laytoncc20c032009-04-30 07:16:21 -04003387
Steve Frenchfb8c4b12007-07-10 01:16:18 +00003388 if ((smb_buffer_response->WordCount == 3) ||
Steve French1a4e15a2006-10-12 21:33:51 +00003389 (smb_buffer_response->WordCount == 7))
3390 /* field is in same location */
Steve French39798772006-05-31 22:40:51 +00003391 tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport);
3392 else
3393 tcon->Flags = 0;
Joe Perchesb6b38f72010-04-21 03:50:45 +00003394 cFYI(1, "Tcon flags: 0x%x ", tcon->Flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003395 } else if ((rc == 0) && tcon == NULL) {
Steve French50c2f752007-07-13 00:33:32 +00003396 /* all we need to save for IPC$ connection */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003397 ses->ipc_tid = smb_buffer_response->Tid;
3398 }
3399
Mariusz Kozlowskia8a11d32007-10-03 16:41:24 +00003400 cifs_buf_release(smb_buffer);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003401 return rc;
3402}
3403
Al Viro2a9b9952011-06-17 09:27:16 -04003404void
3405cifs_umount(struct cifs_sb_info *cifs_sb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003406{
Jeff Laytonb647c352010-10-28 11:16:44 -04003407 struct rb_root *root = &cifs_sb->tlink_tree;
3408 struct rb_node *node;
3409 struct tcon_link *tlink;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003410
Jeff Layton2de970f2010-10-06 19:51:12 -04003411 cancel_delayed_work_sync(&cifs_sb->prune_tlinks);
3412
Jeff Laytonb647c352010-10-28 11:16:44 -04003413 spin_lock(&cifs_sb->tlink_tree_lock);
3414 while ((node = rb_first(root))) {
3415 tlink = rb_entry(node, struct tcon_link, tl_rbnode);
3416 cifs_get_tlink(tlink);
3417 clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags);
3418 rb_erase(node, root);
Steve French50c2f752007-07-13 00:33:32 +00003419
Jeff Laytonb647c352010-10-28 11:16:44 -04003420 spin_unlock(&cifs_sb->tlink_tree_lock);
3421 cifs_put_tlink(tlink);
3422 spin_lock(&cifs_sb->tlink_tree_lock);
3423 }
3424 spin_unlock(&cifs_sb->tlink_tree_lock);
Jeff Layton9d002df2010-10-06 19:51:11 -04003425
Al Virodd854462011-06-17 08:24:42 -04003426 bdi_destroy(&cifs_sb->bdi);
Al Virod757d712011-06-17 09:42:43 -04003427 kfree(cifs_sb->mountdata);
3428 unload_nls(cifs_sb->local_nls);
3429 kfree(cifs_sb);
Steve French50c2f752007-07-13 00:33:32 +00003430}
Linus Torvalds1da177e2005-04-16 15:20:36 -07003431
Steve French96daf2b2011-05-27 04:34:02 +00003432int cifs_negotiate_protocol(unsigned int xid, struct cifs_ses *ses)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003433{
3434 int rc = 0;
Jeff Layton198b5682010-04-24 07:57:48 -04003435 struct TCP_Server_Info *server = ses->server;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003436
Jeff Layton198b5682010-04-24 07:57:48 -04003437 /* only send once per connect */
3438 if (server->maxBuf != 0)
3439 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003440
Jeff Layton198b5682010-04-24 07:57:48 -04003441 rc = CIFSSMBNegotiate(xid, ses);
3442 if (rc == -EAGAIN) {
3443 /* retry only once on 1st time connection */
3444 rc = CIFSSMBNegotiate(xid, ses);
3445 if (rc == -EAGAIN)
3446 rc = -EHOSTDOWN;
3447 }
3448 if (rc == 0) {
3449 spin_lock(&GlobalMid_Lock);
Jeff Layton7fdbaa12011-06-10 16:14:57 -04003450 if (server->tcpStatus == CifsNeedNegotiate)
Jeff Layton198b5682010-04-24 07:57:48 -04003451 server->tcpStatus = CifsGood;
3452 else
3453 rc = -EHOSTDOWN;
3454 spin_unlock(&GlobalMid_Lock);
3455
Linus Torvalds1da177e2005-04-16 15:20:36 -07003456 }
Steve French26b994f2008-08-06 05:11:33 +00003457
Jeff Layton198b5682010-04-24 07:57:48 -04003458 return rc;
3459}
Steve French26b994f2008-08-06 05:11:33 +00003460
Jeff Layton198b5682010-04-24 07:57:48 -04003461
Steve French96daf2b2011-05-27 04:34:02 +00003462int cifs_setup_session(unsigned int xid, struct cifs_ses *ses,
Jeff Layton198b5682010-04-24 07:57:48 -04003463 struct nls_table *nls_info)
3464{
3465 int rc = 0;
3466 struct TCP_Server_Info *server = ses->server;
3467
3468 ses->flags = 0;
3469 ses->capabilities = server->capabilities;
Steve French26b994f2008-08-06 05:11:33 +00003470 if (linuxExtEnabled == 0)
Jeff Layton198b5682010-04-24 07:57:48 -04003471 ses->capabilities &= (~CAP_UNIX);
Steve French20418ac2009-04-30 16:13:32 +00003472
Joe Perchesb6b38f72010-04-21 03:50:45 +00003473 cFYI(1, "Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d",
Steve French96daf2b2011-05-27 04:34:02 +00003474 server->sec_mode, server->capabilities, server->timeAdj);
Jeff Laytoncb7691b2008-08-18 15:41:05 -04003475
Jeff Layton198b5682010-04-24 07:57:48 -04003476 rc = CIFS_SessSetup(xid, ses, nls_info);
Steve French26b994f2008-08-06 05:11:33 +00003477 if (rc) {
Joe Perchesb6b38f72010-04-21 03:50:45 +00003478 cERROR(1, "Send error in SessSetup = %d", rc);
Steve French26b994f2008-08-06 05:11:33 +00003479 } else {
Shirish Pargaonkar5d0d2882010-10-13 18:15:00 -05003480 mutex_lock(&ses->server->srv_mutex);
3481 if (!server->session_estab) {
Shirish Pargaonkar21e73392010-10-21 06:42:55 -05003482 server->session_key.response = ses->auth_key.response;
Shirish Pargaonkar5d0d2882010-10-13 18:15:00 -05003483 server->session_key.len = ses->auth_key.len;
Shirish Pargaonkar21e73392010-10-21 06:42:55 -05003484 server->sequence_number = 0x2;
3485 server->session_estab = true;
3486 ses->auth_key.response = NULL;
Shirish Pargaonkar5d0d2882010-10-13 18:15:00 -05003487 }
3488 mutex_unlock(&server->srv_mutex);
3489
Joe Perchesb6b38f72010-04-21 03:50:45 +00003490 cFYI(1, "CIFS Session Established successfully");
Steve French20418ac2009-04-30 16:13:32 +00003491 spin_lock(&GlobalMid_Lock);
Jeff Layton198b5682010-04-24 07:57:48 -04003492 ses->status = CifsGood;
3493 ses->need_reconnect = false;
Steve French20418ac2009-04-30 16:13:32 +00003494 spin_unlock(&GlobalMid_Lock);
Steve French26b994f2008-08-06 05:11:33 +00003495 }
3496
Shirish Pargaonkar21e73392010-10-21 06:42:55 -05003497 kfree(ses->auth_key.response);
3498 ses->auth_key.response = NULL;
3499 ses->auth_key.len = 0;
Shirish Pargaonkard3686d52010-10-28 09:53:07 -05003500 kfree(ses->ntlmssp);
3501 ses->ntlmssp = NULL;
Shirish Pargaonkar21e73392010-10-21 06:42:55 -05003502
Linus Torvalds1da177e2005-04-16 15:20:36 -07003503 return rc;
3504}
3505
Steve French96daf2b2011-05-27 04:34:02 +00003506static struct cifs_tcon *
Jeff Layton9d002df2010-10-06 19:51:11 -04003507cifs_construct_tcon(struct cifs_sb_info *cifs_sb, uid_t fsuid)
3508{
Steve French96daf2b2011-05-27 04:34:02 +00003509 struct cifs_tcon *master_tcon = cifs_sb_master_tcon(cifs_sb);
3510 struct cifs_ses *ses;
3511 struct cifs_tcon *tcon = NULL;
Jeff Layton9d002df2010-10-06 19:51:11 -04003512 struct smb_vol *vol_info;
Steve French34c87902011-03-01 05:02:57 +00003513 char username[28]; /* big enough for "krb50x" + hex of ULONG_MAX 6+16 */
3514 /* We used to have this as MAX_USERNAME which is */
3515 /* way too big now (256 instead of 32) */
Jeff Layton9d002df2010-10-06 19:51:11 -04003516
3517 vol_info = kzalloc(sizeof(*vol_info), GFP_KERNEL);
3518 if (vol_info == NULL) {
3519 tcon = ERR_PTR(-ENOMEM);
3520 goto out;
3521 }
3522
Steve Frenchea1be1a2011-07-12 18:24:43 +00003523 snprintf(username, sizeof(username), "krb50x%x", fsuid);
Jeff Layton9d002df2010-10-06 19:51:11 -04003524 vol_info->username = username;
3525 vol_info->local_nls = cifs_sb->local_nls;
3526 vol_info->linux_uid = fsuid;
3527 vol_info->cred_uid = fsuid;
3528 vol_info->UNC = master_tcon->treeName;
3529 vol_info->retry = master_tcon->retry;
3530 vol_info->nocase = master_tcon->nocase;
3531 vol_info->local_lease = master_tcon->local_lease;
3532 vol_info->no_linux_ext = !master_tcon->unix_ext;
3533
3534 /* FIXME: allow for other secFlg settings */
3535 vol_info->secFlg = CIFSSEC_MUST_KRB5;
3536
3537 /* get a reference for the same TCP session */
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05303538 spin_lock(&cifs_tcp_ses_lock);
Jeff Layton9d002df2010-10-06 19:51:11 -04003539 ++master_tcon->ses->server->srv_count;
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05303540 spin_unlock(&cifs_tcp_ses_lock);
Jeff Layton9d002df2010-10-06 19:51:11 -04003541
3542 ses = cifs_get_smb_ses(master_tcon->ses->server, vol_info);
3543 if (IS_ERR(ses)) {
Steve French96daf2b2011-05-27 04:34:02 +00003544 tcon = (struct cifs_tcon *)ses;
Jeff Layton9d002df2010-10-06 19:51:11 -04003545 cifs_put_tcp_session(master_tcon->ses->server);
3546 goto out;
3547 }
3548
3549 tcon = cifs_get_tcon(ses, vol_info);
3550 if (IS_ERR(tcon)) {
3551 cifs_put_smb_ses(ses);
3552 goto out;
3553 }
3554
3555 if (ses->capabilities & CAP_UNIX)
3556 reset_cifs_unix_caps(0, tcon, NULL, vol_info);
3557out:
3558 kfree(vol_info);
3559
3560 return tcon;
3561}
3562
Steve French96daf2b2011-05-27 04:34:02 +00003563struct cifs_tcon *
Jeff Layton9d002df2010-10-06 19:51:11 -04003564cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb)
3565{
3566 return tlink_tcon(cifs_sb_master_tlink(cifs_sb));
3567}
3568
3569static int
3570cifs_sb_tcon_pending_wait(void *unused)
3571{
3572 schedule();
3573 return signal_pending(current) ? -ERESTARTSYS : 0;
3574}
3575
Jeff Laytonb647c352010-10-28 11:16:44 -04003576/* find and return a tlink with given uid */
3577static struct tcon_link *
3578tlink_rb_search(struct rb_root *root, uid_t uid)
3579{
3580 struct rb_node *node = root->rb_node;
3581 struct tcon_link *tlink;
3582
3583 while (node) {
3584 tlink = rb_entry(node, struct tcon_link, tl_rbnode);
3585
3586 if (tlink->tl_uid > uid)
3587 node = node->rb_left;
3588 else if (tlink->tl_uid < uid)
3589 node = node->rb_right;
3590 else
3591 return tlink;
3592 }
3593 return NULL;
3594}
3595
3596/* insert a tcon_link into the tree */
3597static void
3598tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink)
3599{
3600 struct rb_node **new = &(root->rb_node), *parent = NULL;
3601 struct tcon_link *tlink;
3602
3603 while (*new) {
3604 tlink = rb_entry(*new, struct tcon_link, tl_rbnode);
3605 parent = *new;
3606
3607 if (tlink->tl_uid > new_tlink->tl_uid)
3608 new = &((*new)->rb_left);
3609 else
3610 new = &((*new)->rb_right);
3611 }
3612
3613 rb_link_node(&new_tlink->tl_rbnode, parent, new);
3614 rb_insert_color(&new_tlink->tl_rbnode, root);
3615}
3616
Jeff Layton9d002df2010-10-06 19:51:11 -04003617/*
3618 * Find or construct an appropriate tcon given a cifs_sb and the fsuid of the
3619 * current task.
3620 *
3621 * If the superblock doesn't refer to a multiuser mount, then just return
3622 * the master tcon for the mount.
3623 *
Suresh Jayaraman6ef933a2010-11-03 10:53:49 +05303624 * First, search the rbtree for an existing tcon for this fsuid. If one
Jeff Layton9d002df2010-10-06 19:51:11 -04003625 * exists, then check to see if it's pending construction. If it is then wait
3626 * for construction to complete. Once it's no longer pending, check to see if
3627 * it failed and either return an error or retry construction, depending on
3628 * the timeout.
3629 *
3630 * If one doesn't exist then insert a new tcon_link struct into the tree and
3631 * try to construct a new one.
3632 */
3633struct tcon_link *
3634cifs_sb_tlink(struct cifs_sb_info *cifs_sb)
3635{
3636 int ret;
Jeff Laytonb647c352010-10-28 11:16:44 -04003637 uid_t fsuid = current_fsuid();
Jeff Layton9d002df2010-10-06 19:51:11 -04003638 struct tcon_link *tlink, *newtlink;
3639
3640 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER))
3641 return cifs_get_tlink(cifs_sb_master_tlink(cifs_sb));
3642
3643 spin_lock(&cifs_sb->tlink_tree_lock);
Jeff Laytonb647c352010-10-28 11:16:44 -04003644 tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid);
Jeff Layton9d002df2010-10-06 19:51:11 -04003645 if (tlink)
3646 cifs_get_tlink(tlink);
3647 spin_unlock(&cifs_sb->tlink_tree_lock);
3648
3649 if (tlink == NULL) {
3650 newtlink = kzalloc(sizeof(*tlink), GFP_KERNEL);
3651 if (newtlink == NULL)
3652 return ERR_PTR(-ENOMEM);
Jeff Laytonb647c352010-10-28 11:16:44 -04003653 newtlink->tl_uid = fsuid;
Jeff Layton9d002df2010-10-06 19:51:11 -04003654 newtlink->tl_tcon = ERR_PTR(-EACCES);
3655 set_bit(TCON_LINK_PENDING, &newtlink->tl_flags);
3656 set_bit(TCON_LINK_IN_TREE, &newtlink->tl_flags);
3657 cifs_get_tlink(newtlink);
3658
Jeff Layton9d002df2010-10-06 19:51:11 -04003659 spin_lock(&cifs_sb->tlink_tree_lock);
3660 /* was one inserted after previous search? */
Jeff Laytonb647c352010-10-28 11:16:44 -04003661 tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid);
Jeff Layton9d002df2010-10-06 19:51:11 -04003662 if (tlink) {
3663 cifs_get_tlink(tlink);
3664 spin_unlock(&cifs_sb->tlink_tree_lock);
Jeff Layton9d002df2010-10-06 19:51:11 -04003665 kfree(newtlink);
3666 goto wait_for_construction;
3667 }
Jeff Layton9d002df2010-10-06 19:51:11 -04003668 tlink = newtlink;
Jeff Laytonb647c352010-10-28 11:16:44 -04003669 tlink_rb_insert(&cifs_sb->tlink_tree, tlink);
3670 spin_unlock(&cifs_sb->tlink_tree_lock);
Jeff Layton9d002df2010-10-06 19:51:11 -04003671 } else {
3672wait_for_construction:
3673 ret = wait_on_bit(&tlink->tl_flags, TCON_LINK_PENDING,
3674 cifs_sb_tcon_pending_wait,
3675 TASK_INTERRUPTIBLE);
3676 if (ret) {
3677 cifs_put_tlink(tlink);
3678 return ERR_PTR(ret);
3679 }
3680
3681 /* if it's good, return it */
3682 if (!IS_ERR(tlink->tl_tcon))
3683 return tlink;
3684
3685 /* return error if we tried this already recently */
3686 if (time_before(jiffies, tlink->tl_time + TLINK_ERROR_EXPIRE)) {
3687 cifs_put_tlink(tlink);
3688 return ERR_PTR(-EACCES);
3689 }
3690
3691 if (test_and_set_bit(TCON_LINK_PENDING, &tlink->tl_flags))
3692 goto wait_for_construction;
3693 }
3694
3695 tlink->tl_tcon = cifs_construct_tcon(cifs_sb, fsuid);
3696 clear_bit(TCON_LINK_PENDING, &tlink->tl_flags);
3697 wake_up_bit(&tlink->tl_flags, TCON_LINK_PENDING);
3698
3699 if (IS_ERR(tlink->tl_tcon)) {
3700 cifs_put_tlink(tlink);
3701 return ERR_PTR(-EACCES);
3702 }
3703
3704 return tlink;
3705}
Jeff Layton2de970f2010-10-06 19:51:12 -04003706
3707/*
3708 * periodic workqueue job that scans tcon_tree for a superblock and closes
3709 * out tcons.
3710 */
3711static void
3712cifs_prune_tlinks(struct work_struct *work)
3713{
3714 struct cifs_sb_info *cifs_sb = container_of(work, struct cifs_sb_info,
3715 prune_tlinks.work);
Jeff Laytonb647c352010-10-28 11:16:44 -04003716 struct rb_root *root = &cifs_sb->tlink_tree;
3717 struct rb_node *node = rb_first(root);
3718 struct rb_node *tmp;
3719 struct tcon_link *tlink;
Jeff Layton2de970f2010-10-06 19:51:12 -04003720
Jeff Laytonb647c352010-10-28 11:16:44 -04003721 /*
3722 * Because we drop the spinlock in the loop in order to put the tlink
3723 * it's not guarded against removal of links from the tree. The only
3724 * places that remove entries from the tree are this function and
3725 * umounts. Because this function is non-reentrant and is canceled
3726 * before umount can proceed, this is safe.
3727 */
3728 spin_lock(&cifs_sb->tlink_tree_lock);
3729 node = rb_first(root);
3730 while (node != NULL) {
3731 tmp = node;
3732 node = rb_next(tmp);
3733 tlink = rb_entry(tmp, struct tcon_link, tl_rbnode);
3734
3735 if (test_bit(TCON_LINK_MASTER, &tlink->tl_flags) ||
3736 atomic_read(&tlink->tl_count) != 0 ||
3737 time_after(tlink->tl_time + TLINK_IDLE_EXPIRE, jiffies))
3738 continue;
3739
3740 cifs_get_tlink(tlink);
3741 clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags);
3742 rb_erase(tmp, root);
3743
Jeff Layton2de970f2010-10-06 19:51:12 -04003744 spin_unlock(&cifs_sb->tlink_tree_lock);
Jeff Laytonb647c352010-10-28 11:16:44 -04003745 cifs_put_tlink(tlink);
3746 spin_lock(&cifs_sb->tlink_tree_lock);
3747 }
3748 spin_unlock(&cifs_sb->tlink_tree_lock);
Jeff Layton2de970f2010-10-06 19:51:12 -04003749
3750 queue_delayed_work(system_nrt_wq, &cifs_sb->prune_tlinks,
3751 TLINK_IDLE_EXPIRE);
3752}