Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * fs/cifs/connect.c |
| 3 | * |
Steve French | d185cda | 2009-04-30 17:45:10 +0000 | [diff] [blame] | 4 | * Copyright (C) International Business Machines Corp., 2002,2009 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | * 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 French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | */ |
| 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 Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 26 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | #include <linux/pagemap.h> |
| 28 | #include <linux/ctype.h> |
| 29 | #include <linux/utsname.h> |
| 30 | #include <linux/mempool.h> |
Steve French | b8643e1 | 2005-04-28 22:41:07 -0700 | [diff] [blame] | 31 | #include <linux/delay.h> |
Steve French | f191401 | 2005-08-18 09:37:34 -0700 | [diff] [blame] | 32 | #include <linux/completion.h> |
Igor Mammedov | aaf737a | 2007-04-03 19:16:43 +0000 | [diff] [blame] | 33 | #include <linux/kthread.h> |
Steve French | 0ae0efa | 2005-10-10 10:57:19 -0700 | [diff] [blame] | 34 | #include <linux/pagevec.h> |
Nigel Cunningham | 7dfb710 | 2006-12-06 20:34:23 -0800 | [diff] [blame] | 35 | #include <linux/freezer.h> |
Igor Mammedov | 5c2503a | 2009-04-21 19:31:05 +0400 | [diff] [blame] | 36 | #include <linux/namei.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | #include <asm/uaccess.h> |
| 38 | #include <asm/processor.h> |
Jeff Layton | 50b64e3 | 2009-06-02 06:55:20 -0400 | [diff] [blame] | 39 | #include <linux/inet.h> |
Paul Gortmaker | 143cb49 | 2011-07-01 14:23:34 -0400 | [diff] [blame] | 40 | #include <linux/module.h> |
Jeff Layton | 8a8798a | 2012-01-17 16:09:15 -0500 | [diff] [blame] | 41 | #include <keys/user-type.h> |
Steve French | 0e2beda | 2009-01-30 21:24:41 +0000 | [diff] [blame] | 42 | #include <net/ipv6.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | #include "cifspdu.h" |
| 44 | #include "cifsglob.h" |
| 45 | #include "cifsproto.h" |
| 46 | #include "cifs_unicode.h" |
| 47 | #include "cifs_debug.h" |
| 48 | #include "cifs_fs_sb.h" |
| 49 | #include "ntlmssp.h" |
| 50 | #include "nterr.h" |
| 51 | #include "rfc1002pdu.h" |
Suresh Jayaraman | 488f1d2d | 2010-07-05 18:12:15 +0530 | [diff] [blame] | 52 | #include "fscache.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | |
| 54 | #define CIFS_PORT 445 |
| 55 | #define RFC1001_PORT 139 |
| 56 | |
Jeff Layton | c74093b | 2011-01-11 07:24:23 -0500 | [diff] [blame] | 57 | /* SMB echo "timeout" -- FIXME: tunable? */ |
| 58 | #define SMB_ECHO_INTERVAL (60 * HZ) |
| 59 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | extern mempool_t *cifs_req_poolp; |
| 61 | |
Jeff Layton | 2de970f | 2010-10-06 19:51:12 -0400 | [diff] [blame] | 62 | /* FIXME: should these be tunable? */ |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 63 | #define TLINK_ERROR_EXPIRE (1 * HZ) |
Jeff Layton | 2de970f | 2010-10-06 19:51:12 -0400 | [diff] [blame] | 64 | #define TLINK_IDLE_EXPIRE (600 * HZ) |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 65 | |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 66 | static int ip_connect(struct TCP_Server_Info *server); |
| 67 | static int generic_ip_connect(struct TCP_Server_Info *server); |
Jeff Layton | b647c35 | 2010-10-28 11:16:44 -0400 | [diff] [blame] | 68 | static void tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink); |
Jeff Layton | 2de970f | 2010-10-06 19:51:12 -0400 | [diff] [blame] | 69 | static void cifs_prune_tlinks(struct work_struct *work); |
Jeff Layton | b9bce2e | 2011-07-06 08:10:39 -0400 | [diff] [blame] | 70 | static int cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data, |
| 71 | const char *devname); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | |
Jeff Layton | d5c5605 | 2008-12-01 18:42:33 -0500 | [diff] [blame] | 73 | /* |
| 74 | * cifs tcp session reconnection |
| 75 | * |
| 76 | * mark tcp session as reconnecting so temporarily locked |
| 77 | * mark all smb sessions as reconnecting for tcp session |
| 78 | * reconnect tcp session |
| 79 | * wake up waiters on reconnection? - (not needed currently) |
| 80 | */ |
Steve French | 2cd646a | 2006-09-28 19:43:08 +0000 | [diff] [blame] | 81 | static int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | cifs_reconnect(struct TCP_Server_Info *server) |
| 83 | { |
| 84 | int rc = 0; |
Jeff Layton | f1987b4 | 2008-11-15 11:12:47 -0500 | [diff] [blame] | 85 | struct list_head *tmp, *tmp2; |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 86 | struct cifs_ses *ses; |
| 87 | struct cifs_tcon *tcon; |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 88 | struct mid_q_entry *mid_entry; |
Jeff Layton | 3c1105d | 2011-05-22 07:09:13 -0400 | [diff] [blame] | 89 | struct list_head retry_list; |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 90 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | spin_lock(&GlobalMid_Lock); |
Jeff Layton | 469ee61 | 2008-10-16 18:46:39 +0000 | [diff] [blame] | 92 | if (server->tcpStatus == CifsExiting) { |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 93 | /* the demux thread will exit normally |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | next time through the loop */ |
| 95 | spin_unlock(&GlobalMid_Lock); |
| 96 | return rc; |
| 97 | } else |
| 98 | server->tcpStatus = CifsNeedReconnect; |
| 99 | spin_unlock(&GlobalMid_Lock); |
| 100 | server->maxBuf = 0; |
| 101 | |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 102 | cFYI(1, "Reconnecting tcp session"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | |
| 104 | /* before reconnecting the tcp session, mark the smb session (uid) |
| 105 | and the tid bad so they are not used until reconnected */ |
Jeff Layton | 2b84a36c | 2011-01-11 07:24:21 -0500 | [diff] [blame] | 106 | cFYI(1, "%s: marking sessions and tcons for reconnect", __func__); |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 107 | spin_lock(&cifs_tcp_ses_lock); |
Jeff Layton | 14fbf50 | 2008-11-14 13:53:46 -0500 | [diff] [blame] | 108 | list_for_each(tmp, &server->smb_ses_list) { |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 109 | ses = list_entry(tmp, struct cifs_ses, smb_ses_list); |
Jeff Layton | 14fbf50 | 2008-11-14 13:53:46 -0500 | [diff] [blame] | 110 | ses->need_reconnect = true; |
| 111 | ses->ipc_tid = 0; |
Jeff Layton | f1987b4 | 2008-11-15 11:12:47 -0500 | [diff] [blame] | 112 | list_for_each(tmp2, &ses->tcon_list) { |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 113 | tcon = list_entry(tmp2, struct cifs_tcon, tcon_list); |
Jeff Layton | f1987b4 | 2008-11-15 11:12:47 -0500 | [diff] [blame] | 114 | tcon->need_reconnect = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 116 | } |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 117 | spin_unlock(&cifs_tcp_ses_lock); |
Jeff Layton | 2b84a36c | 2011-01-11 07:24:21 -0500 | [diff] [blame] | 118 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | /* do not want to be sending data on a socket we are freeing */ |
Jeff Layton | 2b84a36c | 2011-01-11 07:24:21 -0500 | [diff] [blame] | 120 | cFYI(1, "%s: tearing down socket", __func__); |
Jeff Layton | 72ca545 | 2008-12-01 07:09:36 -0500 | [diff] [blame] | 121 | mutex_lock(&server->srv_mutex); |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 122 | if (server->ssocket) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 123 | cFYI(1, "State: 0x%x Flags: 0x%lx", server->ssocket->state, |
| 124 | server->ssocket->flags); |
Trond Myklebust | 91cf45f | 2007-11-12 18:10:39 -0800 | [diff] [blame] | 125 | kernel_sock_shutdown(server->ssocket, SHUT_WR); |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 126 | cFYI(1, "Post shutdown state: 0x%x Flags: 0x%lx", |
Steve French | 467a8f8 | 2007-06-27 22:41:32 +0000 | [diff] [blame] | 127 | server->ssocket->state, |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 128 | server->ssocket->flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | sock_release(server->ssocket); |
| 130 | server->ssocket = NULL; |
| 131 | } |
Shirish Pargaonkar | 5d0d288 | 2010-10-13 18:15:00 -0500 | [diff] [blame] | 132 | server->sequence_number = 0; |
| 133 | server->session_estab = false; |
Shirish Pargaonkar | 21e7339 | 2010-10-21 06:42:55 -0500 | [diff] [blame] | 134 | kfree(server->session_key.response); |
| 135 | server->session_key.response = NULL; |
| 136 | server->session_key.len = 0; |
Steve French | fda3594 | 2011-01-20 18:06:34 +0000 | [diff] [blame] | 137 | server->lstrp = jiffies; |
Jeff Layton | 2b84a36c | 2011-01-11 07:24:21 -0500 | [diff] [blame] | 138 | mutex_unlock(&server->srv_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | |
Jeff Layton | 2b84a36c | 2011-01-11 07:24:21 -0500 | [diff] [blame] | 140 | /* mark submitted MIDs for retry and issue callback */ |
Jeff Layton | 3c1105d | 2011-05-22 07:09:13 -0400 | [diff] [blame] | 141 | INIT_LIST_HEAD(&retry_list); |
| 142 | cFYI(1, "%s: moving mids to private list", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | spin_lock(&GlobalMid_Lock); |
Jeff Layton | 2b84a36c | 2011-01-11 07:24:21 -0500 | [diff] [blame] | 144 | list_for_each_safe(tmp, tmp2, &server->pending_mid_q) { |
| 145 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); |
| 146 | if (mid_entry->midState == MID_REQUEST_SUBMITTED) |
Steve French | ad8b15f | 2008-08-08 21:10:16 +0000 | [diff] [blame] | 147 | mid_entry->midState = MID_RETRY_NEEDED; |
Jeff Layton | 3c1105d | 2011-05-22 07:09:13 -0400 | [diff] [blame] | 148 | list_move(&mid_entry->qhead, &retry_list); |
| 149 | } |
| 150 | spin_unlock(&GlobalMid_Lock); |
| 151 | |
| 152 | cFYI(1, "%s: issuing mid callbacks", __func__); |
| 153 | list_for_each_safe(tmp, tmp2, &retry_list) { |
| 154 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); |
Jeff Layton | 2b84a36c | 2011-01-11 07:24:21 -0500 | [diff] [blame] | 155 | list_del_init(&mid_entry->qhead); |
| 156 | mid_entry->callback(mid_entry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | |
Jeff Layton | 7fdbaa1 | 2011-06-10 16:14:57 -0400 | [diff] [blame] | 159 | do { |
Steve French | 6c3d890 | 2006-07-31 22:46:20 +0000 | [diff] [blame] | 160 | try_to_freeze(); |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 161 | |
| 162 | /* we should try only the port we connected to before */ |
| 163 | rc = generic_ip_connect(server); |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 164 | if (rc) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 165 | cFYI(1, "reconnect error %d", rc); |
Steve French | 0cb766a | 2005-04-28 22:41:11 -0700 | [diff] [blame] | 166 | msleep(3000); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | } else { |
| 168 | atomic_inc(&tcpSesReconnectCount); |
| 169 | spin_lock(&GlobalMid_Lock); |
Jeff Layton | 469ee61 | 2008-10-16 18:46:39 +0000 | [diff] [blame] | 170 | if (server->tcpStatus != CifsExiting) |
Steve French | fd88ce9 | 2011-04-12 01:01:14 +0000 | [diff] [blame] | 171 | server->tcpStatus = CifsNeedNegotiate; |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 172 | spin_unlock(&GlobalMid_Lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | } |
Jeff Layton | 7fdbaa1 | 2011-06-10 16:14:57 -0400 | [diff] [blame] | 174 | } while (server->tcpStatus == CifsNeedReconnect); |
Jeff Layton | 2b84a36c | 2011-01-11 07:24:21 -0500 | [diff] [blame] | 175 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | return rc; |
| 177 | } |
| 178 | |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 179 | /* |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 180 | return codes: |
| 181 | 0 not a transact2, or all data present |
| 182 | >0 transact2 with that much data missing |
| 183 | -EINVAL = invalid transact2 |
| 184 | |
| 185 | */ |
Jeff Layton | c974bef | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 186 | static int check2ndT2(struct smb_hdr *pSMB) |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 187 | { |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 188 | struct smb_t2_rsp *pSMBt; |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 189 | int remaining; |
Jeff Layton | 26ec254 | 2011-01-20 13:36:51 -0500 | [diff] [blame] | 190 | __u16 total_data_size, data_in_this_rsp; |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 191 | |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 192 | if (pSMB->Command != SMB_COM_TRANSACTION2) |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 193 | return 0; |
| 194 | |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 195 | /* check for plausible wct, bcc and t2 data and parm sizes */ |
| 196 | /* check for parm and data offset going beyond end of smb */ |
| 197 | if (pSMB->WordCount != 10) { /* coalesce_t2 depends on this */ |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 198 | cFYI(1, "invalid transact2 word count"); |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 199 | return -EINVAL; |
| 200 | } |
| 201 | |
| 202 | pSMBt = (struct smb_t2_rsp *)pSMB; |
| 203 | |
Jeff Layton | 26ec254 | 2011-01-20 13:36:51 -0500 | [diff] [blame] | 204 | total_data_size = get_unaligned_le16(&pSMBt->t2_rsp.TotalDataCount); |
| 205 | data_in_this_rsp = get_unaligned_le16(&pSMBt->t2_rsp.DataCount); |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 206 | |
Jeff Layton | c0c7b90 | 2011-03-31 17:32:54 -0400 | [diff] [blame] | 207 | if (total_data_size == data_in_this_rsp) |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 208 | return 0; |
Jeff Layton | c0c7b90 | 2011-03-31 17:32:54 -0400 | [diff] [blame] | 209 | else if (total_data_size < data_in_this_rsp) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 210 | cFYI(1, "total data %d smaller than data in frame %d", |
| 211 | total_data_size, data_in_this_rsp); |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 212 | return -EINVAL; |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 213 | } |
Jeff Layton | c0c7b90 | 2011-03-31 17:32:54 -0400 | [diff] [blame] | 214 | |
| 215 | remaining = total_data_size - data_in_this_rsp; |
| 216 | |
| 217 | cFYI(1, "missing %d bytes from transact2, check next response", |
| 218 | remaining); |
Jeff Layton | c974bef | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 219 | if (total_data_size > CIFSMaxBufSize) { |
Jeff Layton | c0c7b90 | 2011-03-31 17:32:54 -0400 | [diff] [blame] | 220 | cERROR(1, "TotalDataSize %d is over maximum buffer %d", |
Jeff Layton | c974bef | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 221 | total_data_size, CIFSMaxBufSize); |
Jeff Layton | c0c7b90 | 2011-03-31 17:32:54 -0400 | [diff] [blame] | 222 | return -EINVAL; |
| 223 | } |
| 224 | return remaining; |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 225 | } |
| 226 | |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 227 | static int coalesce_t2(struct smb_hdr *psecond, struct smb_hdr *pTargetSMB) |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 228 | { |
Jeff Layton | f5fffce | 2012-01-17 13:49:17 -0500 | [diff] [blame] | 229 | struct smb_t2_rsp *pSMBs = (struct smb_t2_rsp *)psecond; |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 230 | struct smb_t2_rsp *pSMBt = (struct smb_t2_rsp *)pTargetSMB; |
Jeff Layton | f5fffce | 2012-01-17 13:49:17 -0500 | [diff] [blame] | 231 | char *data_area_of_tgt; |
| 232 | char *data_area_of_src; |
Jeff Layton | 26ec254 | 2011-01-20 13:36:51 -0500 | [diff] [blame] | 233 | int remaining; |
Jeff Layton | f5fffce | 2012-01-17 13:49:17 -0500 | [diff] [blame] | 234 | unsigned int byte_count, total_in_tgt; |
| 235 | __u16 tgt_total_cnt, src_total_cnt, total_in_src; |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 236 | |
Jeff Layton | f5fffce | 2012-01-17 13:49:17 -0500 | [diff] [blame] | 237 | src_total_cnt = get_unaligned_le16(&pSMBs->t2_rsp.TotalDataCount); |
| 238 | tgt_total_cnt = get_unaligned_le16(&pSMBt->t2_rsp.TotalDataCount); |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 239 | |
Jeff Layton | f5fffce | 2012-01-17 13:49:17 -0500 | [diff] [blame] | 240 | if (tgt_total_cnt != src_total_cnt) |
| 241 | cFYI(1, "total data count of primary and secondary t2 differ " |
| 242 | "source=%hu target=%hu", src_total_cnt, tgt_total_cnt); |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 243 | |
Jeff Layton | f5fffce | 2012-01-17 13:49:17 -0500 | [diff] [blame] | 244 | total_in_tgt = get_unaligned_le16(&pSMBt->t2_rsp.DataCount); |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 245 | |
Jeff Layton | f5fffce | 2012-01-17 13:49:17 -0500 | [diff] [blame] | 246 | remaining = tgt_total_cnt - total_in_tgt; |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 247 | |
Jeff Layton | f5fffce | 2012-01-17 13:49:17 -0500 | [diff] [blame] | 248 | if (remaining < 0) { |
| 249 | cFYI(1, "Server sent too much data. tgt_total_cnt=%hu " |
| 250 | "total_in_tgt=%hu", tgt_total_cnt, total_in_tgt); |
Jeff Layton | 2a2047bc | 2011-04-27 13:29:49 -0400 | [diff] [blame] | 251 | return -EPROTO; |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 252 | } |
| 253 | |
Jeff Layton | f5fffce | 2012-01-17 13:49:17 -0500 | [diff] [blame] | 254 | if (remaining == 0) { |
| 255 | /* nothing to do, ignore */ |
| 256 | cFYI(1, "no more data remains"); |
| 257 | return 0; |
| 258 | } |
| 259 | |
| 260 | total_in_src = get_unaligned_le16(&pSMBs->t2_rsp.DataCount); |
| 261 | if (remaining < total_in_src) |
| 262 | cFYI(1, "transact2 2nd response contains too much data"); |
| 263 | |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 264 | /* find end of first SMB data area */ |
Jeff Layton | f5fffce | 2012-01-17 13:49:17 -0500 | [diff] [blame] | 265 | data_area_of_tgt = (char *)&pSMBt->hdr.Protocol + |
Jeff Layton | 26ec254 | 2011-01-20 13:36:51 -0500 | [diff] [blame] | 266 | get_unaligned_le16(&pSMBt->t2_rsp.DataOffset); |
Jeff Layton | f5fffce | 2012-01-17 13:49:17 -0500 | [diff] [blame] | 267 | |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 268 | /* validate target area */ |
Jeff Layton | f5fffce | 2012-01-17 13:49:17 -0500 | [diff] [blame] | 269 | data_area_of_src = (char *)&pSMBs->hdr.Protocol + |
| 270 | get_unaligned_le16(&pSMBs->t2_rsp.DataOffset); |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 271 | |
Jeff Layton | f5fffce | 2012-01-17 13:49:17 -0500 | [diff] [blame] | 272 | data_area_of_tgt += total_in_tgt; |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 273 | |
Jeff Layton | f5fffce | 2012-01-17 13:49:17 -0500 | [diff] [blame] | 274 | total_in_tgt += total_in_src; |
Jeff Layton | 2a2047bc | 2011-04-27 13:29:49 -0400 | [diff] [blame] | 275 | /* is the result too big for the field? */ |
Jeff Layton | f5fffce | 2012-01-17 13:49:17 -0500 | [diff] [blame] | 276 | if (total_in_tgt > USHRT_MAX) { |
| 277 | cFYI(1, "coalesced DataCount too large (%u)", total_in_tgt); |
Jeff Layton | 2a2047bc | 2011-04-27 13:29:49 -0400 | [diff] [blame] | 278 | return -EPROTO; |
Jeff Layton | f5fffce | 2012-01-17 13:49:17 -0500 | [diff] [blame] | 279 | } |
| 280 | put_unaligned_le16(total_in_tgt, &pSMBt->t2_rsp.DataCount); |
Jeff Layton | 2a2047bc | 2011-04-27 13:29:49 -0400 | [diff] [blame] | 281 | |
| 282 | /* fix up the BCC */ |
Jeff Layton | 820a803 | 2011-05-04 08:05:26 -0400 | [diff] [blame] | 283 | byte_count = get_bcc(pTargetSMB); |
Jeff Layton | f5fffce | 2012-01-17 13:49:17 -0500 | [diff] [blame] | 284 | byte_count += total_in_src; |
Jeff Layton | 2a2047bc | 2011-04-27 13:29:49 -0400 | [diff] [blame] | 285 | /* is the result too big for the field? */ |
Jeff Layton | f5fffce | 2012-01-17 13:49:17 -0500 | [diff] [blame] | 286 | if (byte_count > USHRT_MAX) { |
| 287 | cFYI(1, "coalesced BCC too large (%u)", byte_count); |
Jeff Layton | 2a2047bc | 2011-04-27 13:29:49 -0400 | [diff] [blame] | 288 | return -EPROTO; |
Jeff Layton | f5fffce | 2012-01-17 13:49:17 -0500 | [diff] [blame] | 289 | } |
Jeff Layton | 820a803 | 2011-05-04 08:05:26 -0400 | [diff] [blame] | 290 | put_bcc(byte_count, pTargetSMB); |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 291 | |
Steve French | be8e3b0 | 2011-04-29 05:40:20 +0000 | [diff] [blame] | 292 | byte_count = be32_to_cpu(pTargetSMB->smb_buf_length); |
Jeff Layton | f5fffce | 2012-01-17 13:49:17 -0500 | [diff] [blame] | 293 | byte_count += total_in_src; |
Jeff Layton | 2a2047bc | 2011-04-27 13:29:49 -0400 | [diff] [blame] | 294 | /* don't allow buffer to overflow */ |
Jeff Layton | f5fffce | 2012-01-17 13:49:17 -0500 | [diff] [blame] | 295 | if (byte_count > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) { |
| 296 | cFYI(1, "coalesced BCC exceeds buffer size (%u)", byte_count); |
Jeff Layton | 2a2047bc | 2011-04-27 13:29:49 -0400 | [diff] [blame] | 297 | return -ENOBUFS; |
Jeff Layton | f5fffce | 2012-01-17 13:49:17 -0500 | [diff] [blame] | 298 | } |
Steve French | be8e3b0 | 2011-04-29 05:40:20 +0000 | [diff] [blame] | 299 | pTargetSMB->smb_buf_length = cpu_to_be32(byte_count); |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 300 | |
Jeff Layton | f5fffce | 2012-01-17 13:49:17 -0500 | [diff] [blame] | 301 | /* copy second buffer into end of first buffer */ |
| 302 | memcpy(data_area_of_tgt, data_area_of_src, total_in_src); |
Jeff Layton | 2a2047bc | 2011-04-27 13:29:49 -0400 | [diff] [blame] | 303 | |
Jeff Layton | f5fffce | 2012-01-17 13:49:17 -0500 | [diff] [blame] | 304 | if (remaining != total_in_src) { |
| 305 | /* more responses to go */ |
| 306 | cFYI(1, "waiting for more secondary responses"); |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 307 | return 1; |
Jeff Layton | f5fffce | 2012-01-17 13:49:17 -0500 | [diff] [blame] | 308 | } |
| 309 | |
| 310 | /* we are done */ |
| 311 | cFYI(1, "found the last secondary response"); |
| 312 | return 0; |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 313 | } |
| 314 | |
Jeff Layton | c74093b | 2011-01-11 07:24:23 -0500 | [diff] [blame] | 315 | static void |
| 316 | cifs_echo_request(struct work_struct *work) |
| 317 | { |
| 318 | int rc; |
| 319 | struct TCP_Server_Info *server = container_of(work, |
| 320 | struct TCP_Server_Info, echo.work); |
| 321 | |
Jeff Layton | 247ec9b | 2011-02-04 17:09:50 -0500 | [diff] [blame] | 322 | /* |
Jeff Layton | 195291e | 2011-02-09 12:01:42 -0500 | [diff] [blame] | 323 | * We cannot send an echo until the NEGOTIATE_PROTOCOL request is |
| 324 | * done, which is indicated by maxBuf != 0. Also, no need to ping if |
| 325 | * we got a response recently |
Jeff Layton | 247ec9b | 2011-02-04 17:09:50 -0500 | [diff] [blame] | 326 | */ |
Jeff Layton | 195291e | 2011-02-09 12:01:42 -0500 | [diff] [blame] | 327 | if (server->maxBuf == 0 || |
Jeff Layton | 247ec9b | 2011-02-04 17:09:50 -0500 | [diff] [blame] | 328 | time_before(jiffies, server->lstrp + SMB_ECHO_INTERVAL - HZ)) |
Jeff Layton | c74093b | 2011-01-11 07:24:23 -0500 | [diff] [blame] | 329 | goto requeue_echo; |
| 330 | |
| 331 | rc = CIFSSMBEcho(server); |
| 332 | if (rc) |
| 333 | cFYI(1, "Unable to send echo request to server: %s", |
| 334 | server->hostname); |
| 335 | |
| 336 | requeue_echo: |
| 337 | queue_delayed_work(system_nrt_wq, &server->echo, SMB_ECHO_INTERVAL); |
| 338 | } |
| 339 | |
Pavel Shilovsky | 3d9c247 | 2011-08-01 13:19:40 +0400 | [diff] [blame] | 340 | static bool |
Jeff Layton | 2a37ef9 | 2011-10-19 15:29:23 -0400 | [diff] [blame] | 341 | allocate_buffers(struct TCP_Server_Info *server) |
Pavel Shilovsky | 3d9c247 | 2011-08-01 13:19:40 +0400 | [diff] [blame] | 342 | { |
Jeff Layton | 2a37ef9 | 2011-10-19 15:29:23 -0400 | [diff] [blame] | 343 | if (!server->bigbuf) { |
| 344 | server->bigbuf = (char *)cifs_buf_get(); |
| 345 | if (!server->bigbuf) { |
Pavel Shilovsky | 3d9c247 | 2011-08-01 13:19:40 +0400 | [diff] [blame] | 346 | cERROR(1, "No memory for large SMB response"); |
| 347 | msleep(3000); |
| 348 | /* retry will check if exiting */ |
| 349 | return false; |
| 350 | } |
Jeff Layton | 2a37ef9 | 2011-10-19 15:29:23 -0400 | [diff] [blame] | 351 | } else if (server->large_buf) { |
Pavel Shilovsky | 3d9c247 | 2011-08-01 13:19:40 +0400 | [diff] [blame] | 352 | /* we are reusing a dirty large buf, clear its start */ |
Jeff Layton | 2a37ef9 | 2011-10-19 15:29:23 -0400 | [diff] [blame] | 353 | memset(server->bigbuf, 0, sizeof(struct smb_hdr)); |
Pavel Shilovsky | 3d9c247 | 2011-08-01 13:19:40 +0400 | [diff] [blame] | 354 | } |
| 355 | |
Jeff Layton | 2a37ef9 | 2011-10-19 15:29:23 -0400 | [diff] [blame] | 356 | if (!server->smallbuf) { |
| 357 | server->smallbuf = (char *)cifs_small_buf_get(); |
| 358 | if (!server->smallbuf) { |
Pavel Shilovsky | 3d9c247 | 2011-08-01 13:19:40 +0400 | [diff] [blame] | 359 | cERROR(1, "No memory for SMB response"); |
| 360 | msleep(1000); |
| 361 | /* retry will check if exiting */ |
| 362 | return false; |
| 363 | } |
| 364 | /* beginning of smb buffer is cleared in our buf_get */ |
| 365 | } else { |
| 366 | /* if existing small buf clear beginning */ |
Jeff Layton | 2a37ef9 | 2011-10-19 15:29:23 -0400 | [diff] [blame] | 367 | memset(server->smallbuf, 0, sizeof(struct smb_hdr)); |
Pavel Shilovsky | 3d9c247 | 2011-08-01 13:19:40 +0400 | [diff] [blame] | 368 | } |
| 369 | |
Pavel Shilovsky | 3d9c247 | 2011-08-01 13:19:40 +0400 | [diff] [blame] | 370 | return true; |
| 371 | } |
| 372 | |
Jeff Layton | ba749e6 | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 373 | static bool |
| 374 | server_unresponsive(struct TCP_Server_Info *server) |
Pavel Shilovsky | e7015fb | 2011-08-01 13:19:41 +0400 | [diff] [blame] | 375 | { |
Pavel Shilovsky | 6dae51a | 2012-02-21 16:50:23 +0300 | [diff] [blame^] | 376 | /* |
| 377 | * We need to wait 2 echo intervals to make sure we handle such |
| 378 | * situations right: |
| 379 | * 1s client sends a normal SMB request |
| 380 | * 2s client gets a response |
| 381 | * 30s echo workqueue job pops, and decides we got a response recently |
| 382 | * and don't need to send another |
| 383 | * ... |
| 384 | * 65s kernel_recvmsg times out, and we see that we haven't gotten |
| 385 | * a response in >60s. |
| 386 | */ |
| 387 | if (server->tcpStatus == CifsGood && |
| 388 | time_after(jiffies, server->lstrp + 2 * SMB_ECHO_INTERVAL)) { |
Jeff Layton | ba749e6 | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 389 | cERROR(1, "Server %s has not responded in %d seconds. " |
| 390 | "Reconnecting...", server->hostname, |
Pavel Shilovsky | 6dae51a | 2012-02-21 16:50:23 +0300 | [diff] [blame^] | 391 | (2 * SMB_ECHO_INTERVAL) / HZ); |
Jeff Layton | ba749e6 | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 392 | cifs_reconnect(server); |
| 393 | wake_up(&server->response_q); |
| 394 | return true; |
| 395 | } |
Pavel Shilovsky | e7015fb | 2011-08-01 13:19:41 +0400 | [diff] [blame] | 396 | |
Jeff Layton | ba749e6 | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 397 | return false; |
| 398 | } |
| 399 | |
Jeff Layton | 42c4dfc | 2011-10-19 15:28:17 -0400 | [diff] [blame] | 400 | /* |
| 401 | * kvec_array_init - clone a kvec array, and advance into it |
| 402 | * @new: pointer to memory for cloned array |
| 403 | * @iov: pointer to original array |
| 404 | * @nr_segs: number of members in original array |
| 405 | * @bytes: number of bytes to advance into the cloned array |
| 406 | * |
| 407 | * This function will copy the array provided in iov to a section of memory |
| 408 | * and advance the specified number of bytes into the new array. It returns |
| 409 | * the number of segments in the new array. "new" must be at least as big as |
| 410 | * the original iov array. |
| 411 | */ |
| 412 | static unsigned int |
| 413 | kvec_array_init(struct kvec *new, struct kvec *iov, unsigned int nr_segs, |
| 414 | size_t bytes) |
| 415 | { |
| 416 | size_t base = 0; |
| 417 | |
| 418 | while (bytes || !iov->iov_len) { |
| 419 | int copy = min(bytes, iov->iov_len); |
| 420 | |
| 421 | bytes -= copy; |
| 422 | base += copy; |
| 423 | if (iov->iov_len == base) { |
| 424 | iov++; |
| 425 | nr_segs--; |
| 426 | base = 0; |
| 427 | } |
| 428 | } |
| 429 | memcpy(new, iov, sizeof(*iov) * nr_segs); |
| 430 | new->iov_base += base; |
| 431 | new->iov_len -= base; |
| 432 | return nr_segs; |
| 433 | } |
| 434 | |
Jeff Layton | 1041e3f | 2011-10-19 15:28:27 -0400 | [diff] [blame] | 435 | static struct kvec * |
| 436 | get_server_iovec(struct TCP_Server_Info *server, unsigned int nr_segs) |
| 437 | { |
| 438 | struct kvec *new_iov; |
| 439 | |
| 440 | if (server->iov && nr_segs <= server->nr_iov) |
| 441 | return server->iov; |
| 442 | |
| 443 | /* not big enough -- allocate a new one and release the old */ |
| 444 | new_iov = kmalloc(sizeof(*new_iov) * nr_segs, GFP_NOFS); |
| 445 | if (new_iov) { |
| 446 | kfree(server->iov); |
| 447 | server->iov = new_iov; |
| 448 | server->nr_iov = nr_segs; |
| 449 | } |
| 450 | return new_iov; |
| 451 | } |
| 452 | |
Jeff Layton | e28bc5b | 2011-10-19 15:30:07 -0400 | [diff] [blame] | 453 | int |
| 454 | cifs_readv_from_socket(struct TCP_Server_Info *server, struct kvec *iov_orig, |
| 455 | unsigned int nr_segs, unsigned int to_read) |
Pavel Shilovsky | e7015fb | 2011-08-01 13:19:41 +0400 | [diff] [blame] | 456 | { |
Jeff Layton | a52c1eb | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 457 | int length = 0; |
| 458 | int total_read; |
Jeff Layton | 42c4dfc | 2011-10-19 15:28:17 -0400 | [diff] [blame] | 459 | unsigned int segs; |
Jeff Layton | e831e6c | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 460 | struct msghdr smb_msg; |
Jeff Layton | 42c4dfc | 2011-10-19 15:28:17 -0400 | [diff] [blame] | 461 | struct kvec *iov; |
| 462 | |
Jeff Layton | 1041e3f | 2011-10-19 15:28:27 -0400 | [diff] [blame] | 463 | iov = get_server_iovec(server, nr_segs); |
Jeff Layton | 42c4dfc | 2011-10-19 15:28:17 -0400 | [diff] [blame] | 464 | if (!iov) |
| 465 | return -ENOMEM; |
Pavel Shilovsky | e7015fb | 2011-08-01 13:19:41 +0400 | [diff] [blame] | 466 | |
Jeff Layton | e831e6c | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 467 | smb_msg.msg_control = NULL; |
| 468 | smb_msg.msg_controllen = 0; |
| 469 | |
Jeff Layton | a52c1eb | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 470 | for (total_read = 0; to_read; total_read += length, to_read -= length) { |
Jeff Layton | 95edcff | 2011-12-01 20:22:41 -0500 | [diff] [blame] | 471 | try_to_freeze(); |
| 472 | |
Jeff Layton | ba749e6 | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 473 | if (server_unresponsive(server)) { |
Jeff Layton | a52c1eb | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 474 | total_read = -EAGAIN; |
Jeff Layton | ba749e6 | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 475 | break; |
| 476 | } |
| 477 | |
Jeff Layton | 42c4dfc | 2011-10-19 15:28:17 -0400 | [diff] [blame] | 478 | segs = kvec_array_init(iov, iov_orig, nr_segs, total_read); |
| 479 | |
| 480 | length = kernel_recvmsg(server->ssocket, &smb_msg, |
| 481 | iov, segs, to_read, 0); |
| 482 | |
Pavel Shilovsky | e7015fb | 2011-08-01 13:19:41 +0400 | [diff] [blame] | 483 | if (server->tcpStatus == CifsExiting) { |
Jeff Layton | a52c1eb | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 484 | total_read = -ESHUTDOWN; |
Pavel Shilovsky | e7015fb | 2011-08-01 13:19:41 +0400 | [diff] [blame] | 485 | break; |
| 486 | } else if (server->tcpStatus == CifsNeedReconnect) { |
| 487 | cifs_reconnect(server); |
Jeff Layton | a52c1eb | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 488 | total_read = -EAGAIN; |
Pavel Shilovsky | e7015fb | 2011-08-01 13:19:41 +0400 | [diff] [blame] | 489 | break; |
| 490 | } else if (length == -ERESTARTSYS || |
| 491 | length == -EAGAIN || |
| 492 | length == -EINTR) { |
| 493 | /* |
| 494 | * Minimum sleep to prevent looping, allowing socket |
| 495 | * to clear and app threads to set tcpStatus |
| 496 | * CifsNeedReconnect if server hung. |
| 497 | */ |
| 498 | usleep_range(1000, 2000); |
| 499 | length = 0; |
Jeff Layton | a52c1eb | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 500 | continue; |
Pavel Shilovsky | e7015fb | 2011-08-01 13:19:41 +0400 | [diff] [blame] | 501 | } else if (length <= 0) { |
Jeff Layton | a52c1eb | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 502 | cFYI(1, "Received no data or error: expecting %d " |
| 503 | "got %d", to_read, length); |
Pavel Shilovsky | e7015fb | 2011-08-01 13:19:41 +0400 | [diff] [blame] | 504 | cifs_reconnect(server); |
Jeff Layton | a52c1eb | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 505 | total_read = -EAGAIN; |
Pavel Shilovsky | e7015fb | 2011-08-01 13:19:41 +0400 | [diff] [blame] | 506 | break; |
| 507 | } |
| 508 | } |
Jeff Layton | a52c1eb | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 509 | return total_read; |
Pavel Shilovsky | e7015fb | 2011-08-01 13:19:41 +0400 | [diff] [blame] | 510 | } |
Pavel Shilovsky | e7015fb | 2011-08-01 13:19:41 +0400 | [diff] [blame] | 511 | |
Jeff Layton | e28bc5b | 2011-10-19 15:30:07 -0400 | [diff] [blame] | 512 | int |
| 513 | cifs_read_from_socket(struct TCP_Server_Info *server, char *buf, |
| 514 | unsigned int to_read) |
Jeff Layton | 42c4dfc | 2011-10-19 15:28:17 -0400 | [diff] [blame] | 515 | { |
| 516 | struct kvec iov; |
| 517 | |
| 518 | iov.iov_base = buf; |
| 519 | iov.iov_len = to_read; |
| 520 | |
Jeff Layton | e28bc5b | 2011-10-19 15:30:07 -0400 | [diff] [blame] | 521 | return cifs_readv_from_socket(server, &iov, 1, to_read); |
Pavel Shilovsky | e7015fb | 2011-08-01 13:19:41 +0400 | [diff] [blame] | 522 | } |
| 523 | |
Pavel Shilovsky | 98bac62 | 2011-08-01 13:19:42 +0400 | [diff] [blame] | 524 | static bool |
Jeff Layton | fe11e4c | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 525 | is_smb_response(struct TCP_Server_Info *server, unsigned char type) |
Pavel Shilovsky | 98bac62 | 2011-08-01 13:19:42 +0400 | [diff] [blame] | 526 | { |
Pavel Shilovsky | 98bac62 | 2011-08-01 13:19:42 +0400 | [diff] [blame] | 527 | /* |
| 528 | * The first byte big endian of the length field, |
| 529 | * is actually not part of the length but the type |
| 530 | * with the most common, zero, as regular data. |
| 531 | */ |
Jeff Layton | fe11e4c | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 532 | switch (type) { |
| 533 | case RFC1002_SESSION_MESSAGE: |
| 534 | /* Regular SMB response */ |
| 535 | return true; |
| 536 | case RFC1002_SESSION_KEEP_ALIVE: |
| 537 | cFYI(1, "RFC 1002 session keep alive"); |
| 538 | break; |
| 539 | case RFC1002_POSITIVE_SESSION_RESPONSE: |
| 540 | cFYI(1, "RFC 1002 positive session response"); |
| 541 | break; |
| 542 | case RFC1002_NEGATIVE_SESSION_RESPONSE: |
Pavel Shilovsky | 98bac62 | 2011-08-01 13:19:42 +0400 | [diff] [blame] | 543 | /* |
| 544 | * We get this from Windows 98 instead of an error on |
| 545 | * SMB negprot response. |
| 546 | */ |
Jeff Layton | fe11e4c | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 547 | cFYI(1, "RFC 1002 negative session response"); |
Pavel Shilovsky | 98bac62 | 2011-08-01 13:19:42 +0400 | [diff] [blame] | 548 | /* give server a second to clean up */ |
| 549 | msleep(1000); |
| 550 | /* |
| 551 | * Always try 445 first on reconnect since we get NACK |
| 552 | * on some if we ever connected to port 139 (the NACK |
| 553 | * is since we do not begin with RFC1001 session |
| 554 | * initialize frame). |
| 555 | */ |
Jeff Layton | fe11e4c | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 556 | cifs_set_port((struct sockaddr *)&server->dstaddr, CIFS_PORT); |
Pavel Shilovsky | 98bac62 | 2011-08-01 13:19:42 +0400 | [diff] [blame] | 557 | cifs_reconnect(server); |
| 558 | wake_up(&server->response_q); |
Jeff Layton | fe11e4c | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 559 | break; |
| 560 | default: |
| 561 | cERROR(1, "RFC 1002 unknown response type 0x%x", type); |
Pavel Shilovsky | 98bac62 | 2011-08-01 13:19:42 +0400 | [diff] [blame] | 562 | cifs_reconnect(server); |
Pavel Shilovsky | 98bac62 | 2011-08-01 13:19:42 +0400 | [diff] [blame] | 563 | } |
| 564 | |
Jeff Layton | fe11e4c | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 565 | return false; |
Pavel Shilovsky | 98bac62 | 2011-08-01 13:19:42 +0400 | [diff] [blame] | 566 | } |
| 567 | |
Pavel Shilovsky | ad69bae | 2011-08-01 13:19:43 +0400 | [diff] [blame] | 568 | static struct mid_q_entry * |
Jeff Layton | ea1f450 | 2011-10-19 15:29:05 -0400 | [diff] [blame] | 569 | find_mid(struct TCP_Server_Info *server, struct smb_hdr *buf) |
Pavel Shilovsky | ad69bae | 2011-08-01 13:19:43 +0400 | [diff] [blame] | 570 | { |
Jeff Layton | ea1f450 | 2011-10-19 15:29:05 -0400 | [diff] [blame] | 571 | struct mid_q_entry *mid; |
Pavel Shilovsky | ad69bae | 2011-08-01 13:19:43 +0400 | [diff] [blame] | 572 | |
| 573 | spin_lock(&GlobalMid_Lock); |
Jeff Layton | ea1f450 | 2011-10-19 15:29:05 -0400 | [diff] [blame] | 574 | list_for_each_entry(mid, &server->pending_mid_q, qhead) { |
| 575 | if (mid->mid == buf->Mid && |
| 576 | mid->midState == MID_REQUEST_SUBMITTED && |
| 577 | mid->command == buf->Command) { |
| 578 | spin_unlock(&GlobalMid_Lock); |
| 579 | return mid; |
Pavel Shilovsky | ad69bae | 2011-08-01 13:19:43 +0400 | [diff] [blame] | 580 | } |
Pavel Shilovsky | ad69bae | 2011-08-01 13:19:43 +0400 | [diff] [blame] | 581 | } |
| 582 | spin_unlock(&GlobalMid_Lock); |
Jeff Layton | ea1f450 | 2011-10-19 15:29:05 -0400 | [diff] [blame] | 583 | return NULL; |
| 584 | } |
Pavel Shilovsky | ad69bae | 2011-08-01 13:19:43 +0400 | [diff] [blame] | 585 | |
Jeff Layton | e28bc5b | 2011-10-19 15:30:07 -0400 | [diff] [blame] | 586 | void |
| 587 | dequeue_mid(struct mid_q_entry *mid, bool malformed) |
Jeff Layton | ea1f450 | 2011-10-19 15:29:05 -0400 | [diff] [blame] | 588 | { |
| 589 | #ifdef CONFIG_CIFS_STATS2 |
| 590 | mid->when_received = jiffies; |
| 591 | #endif |
| 592 | spin_lock(&GlobalMid_Lock); |
| 593 | if (!malformed) |
| 594 | mid->midState = MID_RESPONSE_RECEIVED; |
| 595 | else |
| 596 | mid->midState = MID_RESPONSE_MALFORMED; |
| 597 | list_del_init(&mid->qhead); |
| 598 | spin_unlock(&GlobalMid_Lock); |
| 599 | } |
| 600 | |
Jeff Layton | c8054eb | 2011-10-19 15:29:31 -0400 | [diff] [blame] | 601 | static void |
| 602 | handle_mid(struct mid_q_entry *mid, struct TCP_Server_Info *server, |
| 603 | struct smb_hdr *buf, int malformed) |
Jeff Layton | ea1f450 | 2011-10-19 15:29:05 -0400 | [diff] [blame] | 604 | { |
Jeff Layton | ffc00e2 | 2011-10-19 15:29:13 -0400 | [diff] [blame] | 605 | if (malformed == 0 && check2ndT2(buf) > 0) { |
| 606 | mid->multiRsp = true; |
Jeff Layton | ea1f450 | 2011-10-19 15:29:05 -0400 | [diff] [blame] | 607 | if (mid->resp_buf) { |
| 608 | /* merge response - fix up 1st*/ |
Jeff Layton | ffc00e2 | 2011-10-19 15:29:13 -0400 | [diff] [blame] | 609 | malformed = coalesce_t2(buf, mid->resp_buf); |
| 610 | if (malformed > 0) |
Jeff Layton | c8054eb | 2011-10-19 15:29:31 -0400 | [diff] [blame] | 611 | return; |
Jeff Layton | ffc00e2 | 2011-10-19 15:29:13 -0400 | [diff] [blame] | 612 | |
Jeff Layton | ea1f450 | 2011-10-19 15:29:05 -0400 | [diff] [blame] | 613 | /* All parts received or packet is malformed. */ |
| 614 | mid->multiEnd = true; |
Jeff Layton | c8054eb | 2011-10-19 15:29:31 -0400 | [diff] [blame] | 615 | return dequeue_mid(mid, malformed); |
Jeff Layton | ea1f450 | 2011-10-19 15:29:05 -0400 | [diff] [blame] | 616 | } |
Jeff Layton | 2a37ef9 | 2011-10-19 15:29:23 -0400 | [diff] [blame] | 617 | if (!server->large_buf) { |
Jeff Layton | ea1f450 | 2011-10-19 15:29:05 -0400 | [diff] [blame] | 618 | /*FIXME: switch to already allocated largebuf?*/ |
| 619 | cERROR(1, "1st trans2 resp needs bigbuf"); |
| 620 | } else { |
| 621 | /* Have first buffer */ |
| 622 | mid->resp_buf = buf; |
| 623 | mid->largeBuf = true; |
Jeff Layton | 2a37ef9 | 2011-10-19 15:29:23 -0400 | [diff] [blame] | 624 | server->bigbuf = NULL; |
Jeff Layton | ea1f450 | 2011-10-19 15:29:05 -0400 | [diff] [blame] | 625 | } |
Jeff Layton | c8054eb | 2011-10-19 15:29:31 -0400 | [diff] [blame] | 626 | return; |
Jeff Layton | ea1f450 | 2011-10-19 15:29:05 -0400 | [diff] [blame] | 627 | } |
| 628 | mid->resp_buf = buf; |
Jeff Layton | 2a37ef9 | 2011-10-19 15:29:23 -0400 | [diff] [blame] | 629 | mid->largeBuf = server->large_buf; |
| 630 | /* Was previous buf put in mpx struct for multi-rsp? */ |
| 631 | if (!mid->multiRsp) { |
| 632 | /* smb buffer will be freed by user thread */ |
| 633 | if (server->large_buf) |
| 634 | server->bigbuf = NULL; |
| 635 | else |
| 636 | server->smallbuf = NULL; |
| 637 | } |
Jeff Layton | ffc00e2 | 2011-10-19 15:29:13 -0400 | [diff] [blame] | 638 | dequeue_mid(mid, malformed); |
Pavel Shilovsky | ad69bae | 2011-08-01 13:19:43 +0400 | [diff] [blame] | 639 | } |
| 640 | |
Pavel Shilovsky | 762dfd1 | 2011-08-01 13:19:44 +0400 | [diff] [blame] | 641 | static void clean_demultiplex_info(struct TCP_Server_Info *server) |
| 642 | { |
| 643 | int length; |
| 644 | |
| 645 | /* take it off the list, if it's not already */ |
| 646 | spin_lock(&cifs_tcp_ses_lock); |
| 647 | list_del_init(&server->tcp_ses_list); |
| 648 | spin_unlock(&cifs_tcp_ses_lock); |
| 649 | |
| 650 | spin_lock(&GlobalMid_Lock); |
| 651 | server->tcpStatus = CifsExiting; |
| 652 | spin_unlock(&GlobalMid_Lock); |
| 653 | wake_up_all(&server->response_q); |
| 654 | |
Pavel Shilovsky | 2d86dbc | 2012-02-06 15:59:18 +0400 | [diff] [blame] | 655 | /* check if we have blocked requests that need to free */ |
Pavel Shilovsky | fc40f9c | 2012-02-17 17:09:12 +0300 | [diff] [blame] | 656 | spin_lock(&server->req_lock); |
Pavel Shilovsky | 2d86dbc | 2012-02-06 15:59:18 +0400 | [diff] [blame] | 657 | if (server->credits <= 0) |
| 658 | server->credits = 1; |
Pavel Shilovsky | fc40f9c | 2012-02-17 17:09:12 +0300 | [diff] [blame] | 659 | spin_unlock(&server->req_lock); |
Pavel Shilovsky | 762dfd1 | 2011-08-01 13:19:44 +0400 | [diff] [blame] | 660 | /* |
| 661 | * Although there should not be any requests blocked on this queue it |
| 662 | * can not hurt to be paranoid and try to wake up requests that may |
| 663 | * haven been blocked when more than 50 at time were on the wire to the |
| 664 | * same server - they now will see the session is in exit state and get |
| 665 | * out of SendReceive. |
| 666 | */ |
| 667 | wake_up_all(&server->request_q); |
| 668 | /* give those requests time to exit */ |
| 669 | msleep(125); |
| 670 | |
| 671 | if (server->ssocket) { |
| 672 | sock_release(server->ssocket); |
| 673 | server->ssocket = NULL; |
| 674 | } |
| 675 | |
| 676 | if (!list_empty(&server->pending_mid_q)) { |
| 677 | struct list_head dispose_list; |
| 678 | struct mid_q_entry *mid_entry; |
| 679 | struct list_head *tmp, *tmp2; |
| 680 | |
| 681 | INIT_LIST_HEAD(&dispose_list); |
| 682 | spin_lock(&GlobalMid_Lock); |
| 683 | list_for_each_safe(tmp, tmp2, &server->pending_mid_q) { |
| 684 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); |
| 685 | cFYI(1, "Clearing mid 0x%x", mid_entry->mid); |
| 686 | mid_entry->midState = MID_SHUTDOWN; |
| 687 | list_move(&mid_entry->qhead, &dispose_list); |
| 688 | } |
| 689 | spin_unlock(&GlobalMid_Lock); |
| 690 | |
| 691 | /* now walk dispose list and issue callbacks */ |
| 692 | list_for_each_safe(tmp, tmp2, &dispose_list) { |
| 693 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); |
| 694 | cFYI(1, "Callback mid 0x%x", mid_entry->mid); |
| 695 | list_del_init(&mid_entry->qhead); |
| 696 | mid_entry->callback(mid_entry); |
| 697 | } |
| 698 | /* 1/8th of sec is more than enough time for them to exit */ |
| 699 | msleep(125); |
| 700 | } |
| 701 | |
| 702 | if (!list_empty(&server->pending_mid_q)) { |
| 703 | /* |
| 704 | * mpx threads have not exited yet give them at least the smb |
| 705 | * send timeout time for long ops. |
| 706 | * |
| 707 | * Due to delays on oplock break requests, we need to wait at |
| 708 | * least 45 seconds before giving up on a request getting a |
| 709 | * response and going ahead and killing cifsd. |
| 710 | */ |
| 711 | cFYI(1, "Wait for exit from demultiplex thread"); |
| 712 | msleep(46000); |
| 713 | /* |
| 714 | * If threads still have not exited they are probably never |
| 715 | * coming home not much else we can do but free the memory. |
| 716 | */ |
| 717 | } |
| 718 | |
| 719 | kfree(server->hostname); |
Jeff Layton | 1041e3f | 2011-10-19 15:28:27 -0400 | [diff] [blame] | 720 | kfree(server->iov); |
Pavel Shilovsky | 762dfd1 | 2011-08-01 13:19:44 +0400 | [diff] [blame] | 721 | kfree(server); |
| 722 | |
| 723 | length = atomic_dec_return(&tcpSesAllocCount); |
| 724 | if (length > 0) |
| 725 | mempool_resize(cifs_req_poolp, length + cifs_min_rcv, |
| 726 | GFP_KERNEL); |
| 727 | } |
| 728 | |
Pavel Shilovsky | e7015fb | 2011-08-01 13:19:41 +0400 | [diff] [blame] | 729 | static int |
Jeff Layton | e9097ab | 2011-10-19 15:29:40 -0400 | [diff] [blame] | 730 | standard_receive3(struct TCP_Server_Info *server, struct mid_q_entry *mid) |
| 731 | { |
| 732 | int length; |
| 733 | char *buf = server->smallbuf; |
| 734 | struct smb_hdr *smb_buffer = (struct smb_hdr *)buf; |
| 735 | unsigned int pdu_length = be32_to_cpu(smb_buffer->smb_buf_length); |
| 736 | |
| 737 | /* make sure this will fit in a large buffer */ |
| 738 | if (pdu_length > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) { |
| 739 | cERROR(1, "SMB response too long (%u bytes)", |
| 740 | pdu_length); |
| 741 | cifs_reconnect(server); |
| 742 | wake_up(&server->response_q); |
| 743 | return -EAGAIN; |
| 744 | } |
| 745 | |
| 746 | /* switch to large buffer if too big for a small one */ |
| 747 | if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) { |
| 748 | server->large_buf = true; |
| 749 | memcpy(server->bigbuf, server->smallbuf, server->total_read); |
| 750 | buf = server->bigbuf; |
| 751 | smb_buffer = (struct smb_hdr *)buf; |
| 752 | } |
| 753 | |
| 754 | /* now read the rest */ |
Jeff Layton | e28bc5b | 2011-10-19 15:30:07 -0400 | [diff] [blame] | 755 | length = cifs_read_from_socket(server, |
Jeff Layton | e9097ab | 2011-10-19 15:29:40 -0400 | [diff] [blame] | 756 | buf + sizeof(struct smb_hdr) - 1, |
| 757 | pdu_length - sizeof(struct smb_hdr) + 1 + 4); |
| 758 | if (length < 0) |
| 759 | return length; |
| 760 | server->total_read += length; |
| 761 | |
| 762 | dump_smb(smb_buffer, server->total_read); |
| 763 | |
| 764 | /* |
| 765 | * We know that we received enough to get to the MID as we |
| 766 | * checked the pdu_length earlier. Now check to see |
| 767 | * if the rest of the header is OK. We borrow the length |
| 768 | * var for the rest of the loop to avoid a new stack var. |
| 769 | * |
| 770 | * 48 bytes is enough to display the header and a little bit |
| 771 | * into the payload for debugging purposes. |
| 772 | */ |
| 773 | length = checkSMB(smb_buffer, smb_buffer->Mid, server->total_read); |
| 774 | if (length != 0) |
| 775 | cifs_dump_mem("Bad SMB: ", buf, |
| 776 | min_t(unsigned int, server->total_read, 48)); |
| 777 | |
Jeff Layton | ff4fa4a | 2012-02-07 06:31:05 -0500 | [diff] [blame] | 778 | if (!mid) |
| 779 | return length; |
Jeff Layton | e9097ab | 2011-10-19 15:29:40 -0400 | [diff] [blame] | 780 | |
Jeff Layton | ff4fa4a | 2012-02-07 06:31:05 -0500 | [diff] [blame] | 781 | handle_mid(mid, server, smb_buffer, length); |
| 782 | return 0; |
Jeff Layton | e9097ab | 2011-10-19 15:29:40 -0400 | [diff] [blame] | 783 | } |
| 784 | |
| 785 | static int |
Al Viro | 7c97c20 | 2011-06-21 08:51:28 -0400 | [diff] [blame] | 786 | cifs_demultiplex_thread(void *p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 787 | { |
| 788 | int length; |
Al Viro | 7c97c20 | 2011-06-21 08:51:28 -0400 | [diff] [blame] | 789 | struct TCP_Server_Info *server = p; |
Jeff Layton | 2a37ef9 | 2011-10-19 15:29:23 -0400 | [diff] [blame] | 790 | unsigned int pdu_length; |
| 791 | char *buf = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 792 | struct smb_hdr *smb_buffer = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 793 | struct task_struct *task_to_wake = NULL; |
| 794 | struct mid_q_entry *mid_entry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 795 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 796 | current->flags |= PF_MEMALLOC; |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 797 | cFYI(1, "Demultiplex PID: %d", task_pid_nr(current)); |
Jeff Layton | 93d0ec8 | 2008-08-02 08:00:48 -0400 | [diff] [blame] | 798 | |
| 799 | length = atomic_inc_return(&tcpSesAllocCount); |
| 800 | if (length > 1) |
Steve French | 26f5736 | 2007-08-30 22:09:15 +0000 | [diff] [blame] | 801 | mempool_resize(cifs_req_poolp, length + cifs_min_rcv, |
| 802 | GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 803 | |
Rafael J. Wysocki | 8314418 | 2007-07-17 04:03:35 -0700 | [diff] [blame] | 804 | set_freezable(); |
Jeff Layton | 469ee61 | 2008-10-16 18:46:39 +0000 | [diff] [blame] | 805 | while (server->tcpStatus != CifsExiting) { |
Steve French | ede1327 | 2005-08-30 20:10:14 -0700 | [diff] [blame] | 806 | if (try_to_freeze()) |
| 807 | continue; |
Steve French | b8643e1 | 2005-04-28 22:41:07 -0700 | [diff] [blame] | 808 | |
Jeff Layton | 2a37ef9 | 2011-10-19 15:29:23 -0400 | [diff] [blame] | 809 | if (!allocate_buffers(server)) |
Pavel Shilovsky | 3d9c247 | 2011-08-01 13:19:40 +0400 | [diff] [blame] | 810 | continue; |
Steve French | b8643e1 | 2005-04-28 22:41:07 -0700 | [diff] [blame] | 811 | |
Jeff Layton | 2a37ef9 | 2011-10-19 15:29:23 -0400 | [diff] [blame] | 812 | server->large_buf = false; |
| 813 | smb_buffer = (struct smb_hdr *)server->smallbuf; |
| 814 | buf = server->smallbuf; |
Steve French | f01d5e1 | 2007-08-30 21:13:31 +0000 | [diff] [blame] | 815 | pdu_length = 4; /* enough to get RFC1001 header */ |
Steve French | fda3594 | 2011-01-20 18:06:34 +0000 | [diff] [blame] | 816 | |
Jeff Layton | e28bc5b | 2011-10-19 15:30:07 -0400 | [diff] [blame] | 817 | length = cifs_read_from_socket(server, buf, pdu_length); |
Jeff Layton | a52c1eb | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 818 | if (length < 0) |
Steve French | fda3594 | 2011-01-20 18:06:34 +0000 | [diff] [blame] | 819 | continue; |
Jeff Layton | 2a37ef9 | 2011-10-19 15:29:23 -0400 | [diff] [blame] | 820 | server->total_read = length; |
Steve French | 67010fb | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 821 | |
Pavel Shilovsky | 98bac62 | 2011-08-01 13:19:42 +0400 | [diff] [blame] | 822 | /* |
| 823 | * The right amount was read from socket - 4 bytes, |
| 824 | * so we can now interpret the length field. |
| 825 | */ |
Steve French | be8e3b0 | 2011-04-29 05:40:20 +0000 | [diff] [blame] | 826 | pdu_length = be32_to_cpu(smb_buffer->smb_buf_length); |
Steve French | 46810cb | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 827 | |
Jeff Layton | fe11e4c | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 828 | cFYI(1, "RFC1002 header 0x%x", pdu_length); |
| 829 | if (!is_smb_response(server, buf[0])) |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 830 | continue; |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 831 | |
Jeff Layton | 89482a5 | 2011-10-19 15:28:57 -0400 | [diff] [blame] | 832 | /* make sure we have enough to get to the MID */ |
| 833 | if (pdu_length < sizeof(struct smb_hdr) - 1 - 4) { |
| 834 | cERROR(1, "SMB response too short (%u bytes)", |
| 835 | pdu_length); |
| 836 | cifs_reconnect(server); |
| 837 | wake_up(&server->response_q); |
| 838 | continue; |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 839 | } |
Pavel Shilovsky | e7015fb | 2011-08-01 13:19:41 +0400 | [diff] [blame] | 840 | |
Jeff Layton | 89482a5 | 2011-10-19 15:28:57 -0400 | [diff] [blame] | 841 | /* read down to the MID */ |
Jeff Layton | e28bc5b | 2011-10-19 15:30:07 -0400 | [diff] [blame] | 842 | length = cifs_read_from_socket(server, buf + 4, |
| 843 | sizeof(struct smb_hdr) - 1 - 4); |
Jeff Layton | 89482a5 | 2011-10-19 15:28:57 -0400 | [diff] [blame] | 844 | if (length < 0) |
| 845 | continue; |
Jeff Layton | 2a37ef9 | 2011-10-19 15:29:23 -0400 | [diff] [blame] | 846 | server->total_read += length; |
Jeff Layton | 89482a5 | 2011-10-19 15:28:57 -0400 | [diff] [blame] | 847 | |
Jeff Layton | c8054eb | 2011-10-19 15:29:31 -0400 | [diff] [blame] | 848 | mid_entry = find_mid(server, smb_buffer); |
| 849 | |
Jeff Layton | 44d22d8 | 2011-10-19 15:29:49 -0400 | [diff] [blame] | 850 | if (!mid_entry || !mid_entry->receive) |
| 851 | length = standard_receive3(server, mid_entry); |
| 852 | else |
| 853 | length = mid_entry->receive(server, mid_entry); |
| 854 | |
Jeff Layton | a52c1eb | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 855 | if (length < 0) |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 856 | continue; |
| 857 | |
Jeff Layton | e9097ab | 2011-10-19 15:29:40 -0400 | [diff] [blame] | 858 | if (server->large_buf) { |
| 859 | buf = server->bigbuf; |
| 860 | smb_buffer = (struct smb_hdr *)buf; |
| 861 | } |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 862 | |
Steve French | fda3594 | 2011-01-20 18:06:34 +0000 | [diff] [blame] | 863 | server->lstrp = jiffies; |
Jeff Layton | 2b84a36c | 2011-01-11 07:24:21 -0500 | [diff] [blame] | 864 | if (mid_entry != NULL) { |
Jeff Layton | 2a37ef9 | 2011-10-19 15:29:23 -0400 | [diff] [blame] | 865 | if (!mid_entry->multiRsp || mid_entry->multiEnd) |
| 866 | mid_entry->callback(mid_entry); |
Jeff Layton | ffc00e2 | 2011-10-19 15:29:13 -0400 | [diff] [blame] | 867 | } else if (!is_valid_oplock_break(smb_buffer, server)) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 868 | cERROR(1, "No task to wake, unknown frame received! " |
Jeff Layton | 8097531 | 2011-01-11 07:24:02 -0500 | [diff] [blame] | 869 | "NumMids %d", atomic_read(&midCount)); |
Pavel Shilovsky | 3d9c247 | 2011-08-01 13:19:40 +0400 | [diff] [blame] | 870 | cifs_dump_mem("Received Data is: ", buf, |
Steve French | 70ca734 | 2005-09-22 16:32:06 -0700 | [diff] [blame] | 871 | sizeof(struct smb_hdr)); |
Steve French | 3979877 | 2006-05-31 22:40:51 +0000 | [diff] [blame] | 872 | #ifdef CONFIG_CIFS_DEBUG2 |
| 873 | cifs_dump_detail(smb_buffer); |
| 874 | cifs_dump_mids(server); |
| 875 | #endif /* CIFS_DEBUG2 */ |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 876 | |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 877 | } |
| 878 | } /* end while !EXITING */ |
| 879 | |
Justin P. Mattock | fd62cb7 | 2011-02-24 22:15:02 -0800 | [diff] [blame] | 880 | /* buffer usually freed in free_mid - need to free it here on exit */ |
Jeff Layton | 2a37ef9 | 2011-10-19 15:29:23 -0400 | [diff] [blame] | 881 | cifs_buf_release(server->bigbuf); |
| 882 | if (server->smallbuf) /* no sense logging a debug message if NULL */ |
| 883 | cifs_small_buf_release(server->smallbuf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 884 | |
Jeff Layton | b1c8d2b | 2008-10-22 13:57:07 -0400 | [diff] [blame] | 885 | task_to_wake = xchg(&server->tsk, NULL); |
Pavel Shilovsky | 762dfd1 | 2011-08-01 13:19:44 +0400 | [diff] [blame] | 886 | clean_demultiplex_info(server); |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 887 | |
Jeff Layton | b1c8d2b | 2008-10-22 13:57:07 -0400 | [diff] [blame] | 888 | /* if server->tsk was NULL then wait for a signal before exiting */ |
| 889 | if (!task_to_wake) { |
| 890 | set_current_state(TASK_INTERRUPTIBLE); |
| 891 | while (!signal_pending(current)) { |
| 892 | schedule(); |
| 893 | set_current_state(TASK_INTERRUPTIBLE); |
| 894 | } |
| 895 | set_current_state(TASK_RUNNING); |
| 896 | } |
| 897 | |
Jeff Layton | 0468a2c | 2008-12-01 07:09:35 -0500 | [diff] [blame] | 898 | module_put_and_exit(0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 899 | } |
| 900 | |
Jeff Layton | c359cf3 | 2007-11-16 22:22:06 +0000 | [diff] [blame] | 901 | /* extract the host portion of the UNC string */ |
| 902 | static char * |
| 903 | extract_hostname(const char *unc) |
| 904 | { |
| 905 | const char *src; |
| 906 | char *dst, *delim; |
| 907 | unsigned int len; |
| 908 | |
| 909 | /* skip double chars at beginning of string */ |
| 910 | /* BB: check validity of these bytes? */ |
| 911 | src = unc + 2; |
| 912 | |
| 913 | /* delimiter between hostname and sharename is always '\\' now */ |
| 914 | delim = strchr(src, '\\'); |
| 915 | if (!delim) |
| 916 | return ERR_PTR(-EINVAL); |
| 917 | |
| 918 | len = delim - src; |
| 919 | dst = kmalloc((len + 1), GFP_KERNEL); |
| 920 | if (dst == NULL) |
| 921 | return ERR_PTR(-ENOMEM); |
| 922 | |
| 923 | memcpy(dst, src, len); |
| 924 | dst[len] = '\0'; |
| 925 | |
| 926 | return dst; |
| 927 | } |
| 928 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 929 | static int |
Sean Finney | b946845 | 2011-04-11 13:19:32 +0000 | [diff] [blame] | 930 | cifs_parse_mount_options(const char *mountdata, const char *devname, |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 931 | struct smb_vol *vol) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 932 | { |
Pavel Shilovsky | 4906e50 | 2011-04-14 22:00:56 +0400 | [diff] [blame] | 933 | char *value, *data, *end; |
Vasily Averin | 957df45 | 2011-06-06 11:33:12 +0400 | [diff] [blame] | 934 | char *mountdata_copy = NULL, *options; |
Shirish Pargaonkar | 3d3ea8e | 2011-09-26 09:56:44 -0500 | [diff] [blame] | 935 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 936 | unsigned int temp_len, i, j; |
| 937 | char separator[2]; |
Jeff Layton | 9b9d6b24 | 2009-07-31 06:56:09 -0400 | [diff] [blame] | 938 | short int override_uid = -1; |
| 939 | short int override_gid = -1; |
| 940 | bool uid_specified = false; |
| 941 | bool gid_specified = false; |
Jeff Layton | 8846399 | 2010-11-22 15:31:03 -0500 | [diff] [blame] | 942 | char *nodename = utsname()->nodename; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 943 | |
| 944 | separator[0] = ','; |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 945 | separator[1] = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 946 | |
Jeff Layton | 8846399 | 2010-11-22 15:31:03 -0500 | [diff] [blame] | 947 | /* |
| 948 | * does not have to be perfect mapping since field is |
| 949 | * informational, only used for servers that do not support |
| 950 | * port 445 and it can be overridden at mount time |
| 951 | */ |
Jeff Layton | 1397f2e | 2011-01-07 11:30:28 -0500 | [diff] [blame] | 952 | memset(vol->source_rfc1001_name, 0x20, RFC1001_NAME_LEN); |
| 953 | for (i = 0; i < strnlen(nodename, RFC1001_NAME_LEN); i++) |
Jeff Layton | 8846399 | 2010-11-22 15:31:03 -0500 | [diff] [blame] | 954 | vol->source_rfc1001_name[i] = toupper(nodename[i]); |
| 955 | |
Jeff Layton | 1397f2e | 2011-01-07 11:30:28 -0500 | [diff] [blame] | 956 | vol->source_rfc1001_name[RFC1001_NAME_LEN] = 0; |
Steve French | a10faeb2 | 2005-08-22 21:38:31 -0700 | [diff] [blame] | 957 | /* null target name indicates to use *SMBSERVR default called name |
| 958 | if we end up sending RFC1001 session initialize */ |
| 959 | vol->target_rfc1001_name[0] = 0; |
Jeff Layton | 3e4b3e1 | 2010-07-19 18:00:17 -0400 | [diff] [blame] | 960 | vol->cred_uid = current_uid(); |
| 961 | vol->linux_uid = current_uid(); |
David Howells | a001e5b | 2008-11-14 10:38:47 +1100 | [diff] [blame] | 962 | vol->linux_gid = current_gid(); |
Jeff Layton | f55ed1a | 2009-05-26 16:28:11 -0400 | [diff] [blame] | 963 | |
| 964 | /* default to only allowing write access to owner of the mount */ |
| 965 | vol->dir_mode = vol->file_mode = S_IRUGO | S_IXUGO | S_IWUSR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 966 | |
| 967 | /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */ |
Jeremy Allison | ac67055 | 2005-06-22 17:26:35 -0700 | [diff] [blame] | 968 | /* default is always to request posix paths. */ |
| 969 | vol->posix_paths = 1; |
Jeff Layton | a0c9217 | 2009-05-27 15:40:47 -0400 | [diff] [blame] | 970 | /* default to using server inode numbers where available */ |
| 971 | vol->server_ino = 1; |
Jeremy Allison | ac67055 | 2005-06-22 17:26:35 -0700 | [diff] [blame] | 972 | |
Suresh Jayaraman | 6d20e84 | 2010-12-01 14:42:28 +0530 | [diff] [blame] | 973 | vol->actimeo = CIFS_DEF_ACTIMEO; |
| 974 | |
Sean Finney | b946845 | 2011-04-11 13:19:32 +0000 | [diff] [blame] | 975 | if (!mountdata) |
| 976 | goto cifs_parse_mount_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 977 | |
Sean Finney | b946845 | 2011-04-11 13:19:32 +0000 | [diff] [blame] | 978 | mountdata_copy = kstrndup(mountdata, PAGE_SIZE, GFP_KERNEL); |
| 979 | if (!mountdata_copy) |
| 980 | goto cifs_parse_mount_err; |
| 981 | |
| 982 | options = mountdata_copy; |
Pavel Shilovsky | 4906e50 | 2011-04-14 22:00:56 +0400 | [diff] [blame] | 983 | end = options + strlen(options); |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 984 | if (strncmp(options, "sep=", 4) == 0) { |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 985 | if (options[4] != 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 986 | separator[0] = options[4]; |
| 987 | options += 5; |
| 988 | } else { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 989 | cFYI(1, "Null separator not allowed"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 990 | } |
| 991 | } |
Shirish Pargaonkar | 3d3ea8e | 2011-09-26 09:56:44 -0500 | [diff] [blame] | 992 | vol->backupuid_specified = false; /* no backup intent for a user */ |
| 993 | vol->backupgid_specified = false; /* no backup intent for a group */ |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 994 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 995 | while ((data = strsep(&options, separator)) != NULL) { |
| 996 | if (!*data) |
| 997 | continue; |
| 998 | if ((value = strchr(data, '=')) != NULL) |
| 999 | *value++ = '\0'; |
| 1000 | |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1001 | /* Have to parse this before we parse for "user" */ |
| 1002 | if (strnicmp(data, "user_xattr", 10) == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1003 | vol->no_xattr = 0; |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1004 | } else if (strnicmp(data, "nouser_xattr", 12) == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1005 | vol->no_xattr = 1; |
| 1006 | } else if (strnicmp(data, "user", 4) == 0) { |
Steve French | 4b952a9 | 2006-10-30 21:46:13 +0000 | [diff] [blame] | 1007 | if (!value) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1008 | printk(KERN_WARNING |
| 1009 | "CIFS: invalid or missing username\n"); |
Sean Finney | b946845 | 2011-04-11 13:19:32 +0000 | [diff] [blame] | 1010 | goto cifs_parse_mount_err; |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 1011 | } else if (!*value) { |
Steve French | 4b952a9 | 2006-10-30 21:46:13 +0000 | [diff] [blame] | 1012 | /* null user, ie anonymous, authentication */ |
| 1013 | vol->nullauth = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1014 | } |
Steve French | 8727c8a | 2011-02-25 01:11:56 -0600 | [diff] [blame] | 1015 | if (strnlen(value, MAX_USERNAME_SIZE) < |
| 1016 | MAX_USERNAME_SIZE) { |
Sean Finney | b946845 | 2011-04-11 13:19:32 +0000 | [diff] [blame] | 1017 | vol->username = kstrdup(value, GFP_KERNEL); |
| 1018 | if (!vol->username) { |
| 1019 | printk(KERN_WARNING "CIFS: no memory " |
| 1020 | "for username\n"); |
| 1021 | goto cifs_parse_mount_err; |
| 1022 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1023 | } else { |
| 1024 | printk(KERN_WARNING "CIFS: username too long\n"); |
Sean Finney | b946845 | 2011-04-11 13:19:32 +0000 | [diff] [blame] | 1025 | goto cifs_parse_mount_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1026 | } |
| 1027 | } else if (strnicmp(data, "pass", 4) == 0) { |
| 1028 | if (!value) { |
| 1029 | vol->password = NULL; |
| 1030 | continue; |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 1031 | } else if (value[0] == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1032 | /* check if string begins with double comma |
| 1033 | since that would mean the password really |
| 1034 | does start with a comma, and would not |
| 1035 | indicate an empty string */ |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 1036 | if (value[1] != separator[0]) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1037 | vol->password = NULL; |
| 1038 | continue; |
| 1039 | } |
| 1040 | } |
| 1041 | temp_len = strlen(value); |
| 1042 | /* removed password length check, NTLM passwords |
| 1043 | can be arbitrarily long */ |
| 1044 | |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1045 | /* if comma in password, the string will be |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1046 | prematurely null terminated. Commas in password are |
| 1047 | specified across the cifs mount interface by a double |
| 1048 | comma ie ,, and a comma used as in other cases ie ',' |
| 1049 | as a parameter delimiter/separator is single and due |
| 1050 | to the strsep above is temporarily zeroed. */ |
| 1051 | |
| 1052 | /* NB: password legally can have multiple commas and |
| 1053 | the only illegal character in a password is null */ |
| 1054 | |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1055 | if ((value[temp_len] == 0) && |
Pavel Shilovsky | 4906e50 | 2011-04-14 22:00:56 +0400 | [diff] [blame] | 1056 | (value + temp_len < end) && |
Steve French | 09d1db5 | 2005-04-28 22:41:08 -0700 | [diff] [blame] | 1057 | (value[temp_len+1] == separator[0])) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1058 | /* reinsert comma */ |
| 1059 | value[temp_len] = separator[0]; |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1060 | temp_len += 2; /* move after second comma */ |
| 1061 | while (value[temp_len] != 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1062 | if (value[temp_len] == separator[0]) { |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1063 | if (value[temp_len+1] == |
Steve French | 09d1db5 | 2005-04-28 22:41:08 -0700 | [diff] [blame] | 1064 | separator[0]) { |
| 1065 | /* skip second comma */ |
| 1066 | temp_len++; |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1067 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1068 | /* single comma indicating start |
| 1069 | of next parm */ |
| 1070 | break; |
| 1071 | } |
| 1072 | } |
| 1073 | temp_len++; |
| 1074 | } |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 1075 | if (value[temp_len] == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1076 | options = NULL; |
| 1077 | } else { |
| 1078 | value[temp_len] = 0; |
| 1079 | /* point option to start of next parm */ |
| 1080 | options = value + temp_len + 1; |
| 1081 | } |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1082 | /* go from value to value + temp_len condensing |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1083 | double commas to singles. Note that this ends up |
| 1084 | allocating a few bytes too many, which is ok */ |
Pekka Enberg | e915fc4 | 2005-09-06 15:18:35 -0700 | [diff] [blame] | 1085 | vol->password = kzalloc(temp_len, GFP_KERNEL); |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 1086 | if (vol->password == NULL) { |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1087 | printk(KERN_WARNING "CIFS: no memory " |
| 1088 | "for password\n"); |
Sean Finney | b946845 | 2011-04-11 13:19:32 +0000 | [diff] [blame] | 1089 | goto cifs_parse_mount_err; |
Steve French | 433dc24 | 2005-04-28 22:41:08 -0700 | [diff] [blame] | 1090 | } |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1091 | for (i = 0, j = 0; i < temp_len; i++, j++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1092 | vol->password[j] = value[i]; |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 1093 | if (value[i] == separator[0] |
Steve French | 09d1db5 | 2005-04-28 22:41:08 -0700 | [diff] [blame] | 1094 | && value[i+1] == separator[0]) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1095 | /* skip second comma */ |
| 1096 | i++; |
| 1097 | } |
| 1098 | } |
| 1099 | vol->password[j] = 0; |
| 1100 | } else { |
Pekka Enberg | e915fc4 | 2005-09-06 15:18:35 -0700 | [diff] [blame] | 1101 | vol->password = kzalloc(temp_len+1, GFP_KERNEL); |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 1102 | if (vol->password == NULL) { |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1103 | printk(KERN_WARNING "CIFS: no memory " |
| 1104 | "for password\n"); |
Sean Finney | b946845 | 2011-04-11 13:19:32 +0000 | [diff] [blame] | 1105 | goto cifs_parse_mount_err; |
Steve French | 433dc24 | 2005-04-28 22:41:08 -0700 | [diff] [blame] | 1106 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1107 | strcpy(vol->password, value); |
| 1108 | } |
Jeff Layton | 58f7f68 | 2009-06-10 09:57:55 -0400 | [diff] [blame] | 1109 | } else if (!strnicmp(data, "ip", 2) || |
| 1110 | !strnicmp(data, "addr", 4)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1111 | if (!value || !*value) { |
| 1112 | vol->UNCip = NULL; |
Jeff Layton | 50b64e3 | 2009-06-02 06:55:20 -0400 | [diff] [blame] | 1113 | } else if (strnlen(value, INET6_ADDRSTRLEN) < |
| 1114 | INET6_ADDRSTRLEN) { |
Sean Finney | b946845 | 2011-04-11 13:19:32 +0000 | [diff] [blame] | 1115 | vol->UNCip = kstrdup(value, GFP_KERNEL); |
| 1116 | if (!vol->UNCip) { |
| 1117 | printk(KERN_WARNING "CIFS: no memory " |
| 1118 | "for UNC IP\n"); |
| 1119 | goto cifs_parse_mount_err; |
| 1120 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1121 | } else { |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1122 | printk(KERN_WARNING "CIFS: ip address " |
| 1123 | "too long\n"); |
Sean Finney | b946845 | 2011-04-11 13:19:32 +0000 | [diff] [blame] | 1124 | goto cifs_parse_mount_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1125 | } |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1126 | } else if (strnicmp(data, "sec", 3) == 0) { |
| 1127 | if (!value || !*value) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 1128 | cERROR(1, "no security value specified"); |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1129 | continue; |
| 1130 | } else if (strnicmp(value, "krb5i", 5) == 0) { |
| 1131 | vol->secFlg |= CIFSSEC_MAY_KRB5 | |
Steve French | 189acaa | 2006-06-23 02:33:48 +0000 | [diff] [blame] | 1132 | CIFSSEC_MUST_SIGN; |
Steve French | bf82067 | 2005-12-01 22:32:42 -0800 | [diff] [blame] | 1133 | } else if (strnicmp(value, "krb5p", 5) == 0) { |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1134 | /* vol->secFlg |= CIFSSEC_MUST_SEAL | |
| 1135 | CIFSSEC_MAY_KRB5; */ |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 1136 | cERROR(1, "Krb5 cifs privacy not supported"); |
Sean Finney | b946845 | 2011-04-11 13:19:32 +0000 | [diff] [blame] | 1137 | goto cifs_parse_mount_err; |
Steve French | bf82067 | 2005-12-01 22:32:42 -0800 | [diff] [blame] | 1138 | } else if (strnicmp(value, "krb5", 4) == 0) { |
Steve French | 750d115 | 2006-06-27 06:28:30 +0000 | [diff] [blame] | 1139 | vol->secFlg |= CIFSSEC_MAY_KRB5; |
Steve French | ac68392 | 2009-05-06 04:16:04 +0000 | [diff] [blame] | 1140 | } else if (strnicmp(value, "ntlmsspi", 8) == 0) { |
| 1141 | vol->secFlg |= CIFSSEC_MAY_NTLMSSP | |
| 1142 | CIFSSEC_MUST_SIGN; |
| 1143 | } else if (strnicmp(value, "ntlmssp", 7) == 0) { |
| 1144 | vol->secFlg |= CIFSSEC_MAY_NTLMSSP; |
Steve French | bf82067 | 2005-12-01 22:32:42 -0800 | [diff] [blame] | 1145 | } else if (strnicmp(value, "ntlmv2i", 7) == 0) { |
Steve French | 750d115 | 2006-06-27 06:28:30 +0000 | [diff] [blame] | 1146 | vol->secFlg |= CIFSSEC_MAY_NTLMV2 | |
Steve French | 189acaa | 2006-06-23 02:33:48 +0000 | [diff] [blame] | 1147 | CIFSSEC_MUST_SIGN; |
Steve French | bf82067 | 2005-12-01 22:32:42 -0800 | [diff] [blame] | 1148 | } else if (strnicmp(value, "ntlmv2", 6) == 0) { |
Steve French | 750d115 | 2006-06-27 06:28:30 +0000 | [diff] [blame] | 1149 | vol->secFlg |= CIFSSEC_MAY_NTLMV2; |
Steve French | bf82067 | 2005-12-01 22:32:42 -0800 | [diff] [blame] | 1150 | } else if (strnicmp(value, "ntlmi", 5) == 0) { |
Steve French | 750d115 | 2006-06-27 06:28:30 +0000 | [diff] [blame] | 1151 | vol->secFlg |= CIFSSEC_MAY_NTLM | |
Steve French | 189acaa | 2006-06-23 02:33:48 +0000 | [diff] [blame] | 1152 | CIFSSEC_MUST_SIGN; |
Steve French | bf82067 | 2005-12-01 22:32:42 -0800 | [diff] [blame] | 1153 | } else if (strnicmp(value, "ntlm", 4) == 0) { |
| 1154 | /* ntlm is default so can be turned off too */ |
Steve French | 750d115 | 2006-06-27 06:28:30 +0000 | [diff] [blame] | 1155 | vol->secFlg |= CIFSSEC_MAY_NTLM; |
Steve French | bf82067 | 2005-12-01 22:32:42 -0800 | [diff] [blame] | 1156 | } else if (strnicmp(value, "nontlm", 6) == 0) { |
Steve French | 189acaa | 2006-06-23 02:33:48 +0000 | [diff] [blame] | 1157 | /* BB is there a better way to do this? */ |
Steve French | 750d115 | 2006-06-27 06:28:30 +0000 | [diff] [blame] | 1158 | vol->secFlg |= CIFSSEC_MAY_NTLMV2; |
Steve French | 189acaa | 2006-06-23 02:33:48 +0000 | [diff] [blame] | 1159 | #ifdef CONFIG_CIFS_WEAK_PW_HASH |
| 1160 | } else if (strnicmp(value, "lanman", 6) == 0) { |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1161 | vol->secFlg |= CIFSSEC_MAY_LANMAN; |
Steve French | 189acaa | 2006-06-23 02:33:48 +0000 | [diff] [blame] | 1162 | #endif |
Steve French | bf82067 | 2005-12-01 22:32:42 -0800 | [diff] [blame] | 1163 | } else if (strnicmp(value, "none", 4) == 0) { |
Steve French | 189acaa | 2006-06-23 02:33:48 +0000 | [diff] [blame] | 1164 | vol->nullauth = 1; |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1165 | } else { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 1166 | cERROR(1, "bad security option: %s", value); |
Sean Finney | b946845 | 2011-04-11 13:19:32 +0000 | [diff] [blame] | 1167 | goto cifs_parse_mount_err; |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1168 | } |
Steve French | 1cb06d0 | 2011-02-24 18:07:19 +0000 | [diff] [blame] | 1169 | } else if (strnicmp(data, "vers", 3) == 0) { |
| 1170 | if (!value || !*value) { |
| 1171 | cERROR(1, "no protocol version specified" |
| 1172 | " after vers= mount option"); |
| 1173 | } else if ((strnicmp(value, "cifs", 4) == 0) || |
| 1174 | (strnicmp(value, "1", 1) == 0)) { |
| 1175 | /* this is the default */ |
| 1176 | continue; |
Steve French | 1cb06d0 | 2011-02-24 18:07:19 +0000 | [diff] [blame] | 1177 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1178 | } else if ((strnicmp(data, "unc", 3) == 0) |
| 1179 | || (strnicmp(data, "target", 6) == 0) |
| 1180 | || (strnicmp(data, "path", 4) == 0)) { |
| 1181 | if (!value || !*value) { |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1182 | printk(KERN_WARNING "CIFS: invalid path to " |
| 1183 | "network resource\n"); |
Sean Finney | b946845 | 2011-04-11 13:19:32 +0000 | [diff] [blame] | 1184 | goto cifs_parse_mount_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1185 | } |
| 1186 | if ((temp_len = strnlen(value, 300)) < 300) { |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1187 | vol->UNC = kmalloc(temp_len+1, GFP_KERNEL); |
Steve French | 4523cc3 | 2007-04-30 20:13:06 +0000 | [diff] [blame] | 1188 | if (vol->UNC == NULL) |
Sean Finney | b946845 | 2011-04-11 13:19:32 +0000 | [diff] [blame] | 1189 | goto cifs_parse_mount_err; |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1190 | strcpy(vol->UNC, value); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1191 | if (strncmp(vol->UNC, "//", 2) == 0) { |
| 1192 | vol->UNC[0] = '\\'; |
| 1193 | vol->UNC[1] = '\\'; |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1194 | } else if (strncmp(vol->UNC, "\\\\", 2) != 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1195 | printk(KERN_WARNING |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1196 | "CIFS: UNC Path does not begin " |
| 1197 | "with // or \\\\ \n"); |
Sean Finney | b946845 | 2011-04-11 13:19:32 +0000 | [diff] [blame] | 1198 | goto cifs_parse_mount_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1199 | } |
| 1200 | } else { |
| 1201 | printk(KERN_WARNING "CIFS: UNC name too long\n"); |
Sean Finney | b946845 | 2011-04-11 13:19:32 +0000 | [diff] [blame] | 1202 | goto cifs_parse_mount_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1203 | } |
| 1204 | } else if ((strnicmp(data, "domain", 3) == 0) |
| 1205 | || (strnicmp(data, "workgroup", 5) == 0)) { |
| 1206 | if (!value || !*value) { |
| 1207 | printk(KERN_WARNING "CIFS: invalid domain name\n"); |
Sean Finney | b946845 | 2011-04-11 13:19:32 +0000 | [diff] [blame] | 1208 | goto cifs_parse_mount_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1209 | } |
| 1210 | /* BB are there cases in which a comma can be valid in |
| 1211 | a domain name and need special handling? */ |
Steve French | 3979877 | 2006-05-31 22:40:51 +0000 | [diff] [blame] | 1212 | if (strnlen(value, 256) < 256) { |
Sean Finney | b946845 | 2011-04-11 13:19:32 +0000 | [diff] [blame] | 1213 | vol->domainname = kstrdup(value, GFP_KERNEL); |
| 1214 | if (!vol->domainname) { |
| 1215 | printk(KERN_WARNING "CIFS: no memory " |
| 1216 | "for domainname\n"); |
| 1217 | goto cifs_parse_mount_err; |
| 1218 | } |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 1219 | cFYI(1, "Domain name set"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1220 | } else { |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1221 | printk(KERN_WARNING "CIFS: domain name too " |
| 1222 | "long\n"); |
Sean Finney | b946845 | 2011-04-11 13:19:32 +0000 | [diff] [blame] | 1223 | goto cifs_parse_mount_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1224 | } |
Ben Greear | 3eb9a88 | 2010-09-01 17:06:02 -0700 | [diff] [blame] | 1225 | } else if (strnicmp(data, "srcaddr", 7) == 0) { |
| 1226 | vol->srcaddr.ss_family = AF_UNSPEC; |
| 1227 | |
| 1228 | if (!value || !*value) { |
| 1229 | printk(KERN_WARNING "CIFS: srcaddr value" |
| 1230 | " not specified.\n"); |
Sean Finney | b946845 | 2011-04-11 13:19:32 +0000 | [diff] [blame] | 1231 | goto cifs_parse_mount_err; |
Ben Greear | 3eb9a88 | 2010-09-01 17:06:02 -0700 | [diff] [blame] | 1232 | } |
| 1233 | i = cifs_convert_address((struct sockaddr *)&vol->srcaddr, |
| 1234 | value, strlen(value)); |
Dan Carpenter | b235f37 | 2010-10-25 07:02:56 +0200 | [diff] [blame] | 1235 | if (i == 0) { |
Ben Greear | 3eb9a88 | 2010-09-01 17:06:02 -0700 | [diff] [blame] | 1236 | printk(KERN_WARNING "CIFS: Could not parse" |
| 1237 | " srcaddr: %s\n", |
| 1238 | value); |
Sean Finney | b946845 | 2011-04-11 13:19:32 +0000 | [diff] [blame] | 1239 | goto cifs_parse_mount_err; |
Ben Greear | 3eb9a88 | 2010-09-01 17:06:02 -0700 | [diff] [blame] | 1240 | } |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1241 | } else if (strnicmp(data, "prefixpath", 10) == 0) { |
| 1242 | if (!value || !*value) { |
| 1243 | printk(KERN_WARNING |
| 1244 | "CIFS: invalid path prefix\n"); |
Sean Finney | b946845 | 2011-04-11 13:19:32 +0000 | [diff] [blame] | 1245 | goto cifs_parse_mount_err; |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1246 | } |
| 1247 | if ((temp_len = strnlen(value, 1024)) < 1024) { |
Steve French | 4523cc3 | 2007-04-30 20:13:06 +0000 | [diff] [blame] | 1248 | if (value[0] != '/') |
Steve French | 2fe87f0 | 2006-09-21 07:02:52 +0000 | [diff] [blame] | 1249 | temp_len++; /* missing leading slash */ |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1250 | vol->prepath = kmalloc(temp_len+1, GFP_KERNEL); |
| 1251 | if (vol->prepath == NULL) |
Sean Finney | b946845 | 2011-04-11 13:19:32 +0000 | [diff] [blame] | 1252 | goto cifs_parse_mount_err; |
Steve French | 4523cc3 | 2007-04-30 20:13:06 +0000 | [diff] [blame] | 1253 | if (value[0] != '/') { |
Steve French | 2fe87f0 | 2006-09-21 07:02:52 +0000 | [diff] [blame] | 1254 | vol->prepath[0] = '/'; |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1255 | strcpy(vol->prepath+1, value); |
Steve French | 2fe87f0 | 2006-09-21 07:02:52 +0000 | [diff] [blame] | 1256 | } else |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1257 | strcpy(vol->prepath, value); |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 1258 | cFYI(1, "prefix path %s", vol->prepath); |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1259 | } else { |
| 1260 | printk(KERN_WARNING "CIFS: prefix too long\n"); |
Sean Finney | b946845 | 2011-04-11 13:19:32 +0000 | [diff] [blame] | 1261 | goto cifs_parse_mount_err; |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1262 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1263 | } else if (strnicmp(data, "iocharset", 9) == 0) { |
| 1264 | if (!value || !*value) { |
Steve French | 63135e0 | 2007-07-17 17:34:02 +0000 | [diff] [blame] | 1265 | printk(KERN_WARNING "CIFS: invalid iocharset " |
| 1266 | "specified\n"); |
Sean Finney | b946845 | 2011-04-11 13:19:32 +0000 | [diff] [blame] | 1267 | goto cifs_parse_mount_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1268 | } |
| 1269 | if (strnlen(value, 65) < 65) { |
Sean Finney | b946845 | 2011-04-11 13:19:32 +0000 | [diff] [blame] | 1270 | if (strnicmp(value, "default", 7)) { |
| 1271 | vol->iocharset = kstrdup(value, |
| 1272 | GFP_KERNEL); |
| 1273 | |
| 1274 | if (!vol->iocharset) { |
| 1275 | printk(KERN_WARNING "CIFS: no " |
| 1276 | "memory for" |
| 1277 | "charset\n"); |
| 1278 | goto cifs_parse_mount_err; |
| 1279 | } |
| 1280 | } |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1281 | /* if iocharset not set then load_nls_default |
| 1282 | is used by caller */ |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 1283 | cFYI(1, "iocharset set to %s", value); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1284 | } else { |
Steve French | 63135e0 | 2007-07-17 17:34:02 +0000 | [diff] [blame] | 1285 | printk(KERN_WARNING "CIFS: iocharset name " |
| 1286 | "too long.\n"); |
Sean Finney | b946845 | 2011-04-11 13:19:32 +0000 | [diff] [blame] | 1287 | goto cifs_parse_mount_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1288 | } |
Jeff Layton | 9b9d6b24 | 2009-07-31 06:56:09 -0400 | [diff] [blame] | 1289 | } else if (!strnicmp(data, "uid", 3) && value && *value) { |
| 1290 | vol->linux_uid = simple_strtoul(value, &value, 0); |
| 1291 | uid_specified = true; |
Jeff Layton | bd76331 | 2011-01-11 10:33:24 -0500 | [diff] [blame] | 1292 | } else if (!strnicmp(data, "cruid", 5) && value && *value) { |
| 1293 | vol->cred_uid = simple_strtoul(value, &value, 0); |
Jeff Layton | 9b9d6b24 | 2009-07-31 06:56:09 -0400 | [diff] [blame] | 1294 | } else if (!strnicmp(data, "forceuid", 8)) { |
| 1295 | override_uid = 1; |
| 1296 | } else if (!strnicmp(data, "noforceuid", 10)) { |
| 1297 | override_uid = 0; |
| 1298 | } else if (!strnicmp(data, "gid", 3) && value && *value) { |
| 1299 | vol->linux_gid = simple_strtoul(value, &value, 0); |
| 1300 | gid_specified = true; |
| 1301 | } else if (!strnicmp(data, "forcegid", 8)) { |
| 1302 | override_gid = 1; |
| 1303 | } else if (!strnicmp(data, "noforcegid", 10)) { |
| 1304 | override_gid = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1305 | } else if (strnicmp(data, "file_mode", 4) == 0) { |
| 1306 | if (value && *value) { |
| 1307 | vol->file_mode = |
| 1308 | simple_strtoul(value, &value, 0); |
| 1309 | } |
| 1310 | } else if (strnicmp(data, "dir_mode", 4) == 0) { |
| 1311 | if (value && *value) { |
| 1312 | vol->dir_mode = |
| 1313 | simple_strtoul(value, &value, 0); |
| 1314 | } |
| 1315 | } else if (strnicmp(data, "dirmode", 4) == 0) { |
| 1316 | if (value && *value) { |
| 1317 | vol->dir_mode = |
| 1318 | simple_strtoul(value, &value, 0); |
| 1319 | } |
| 1320 | } else if (strnicmp(data, "port", 4) == 0) { |
| 1321 | if (value && *value) { |
| 1322 | vol->port = |
| 1323 | simple_strtoul(value, &value, 0); |
| 1324 | } |
| 1325 | } else if (strnicmp(data, "rsize", 5) == 0) { |
| 1326 | if (value && *value) { |
| 1327 | vol->rsize = |
| 1328 | simple_strtoul(value, &value, 0); |
| 1329 | } |
| 1330 | } else if (strnicmp(data, "wsize", 5) == 0) { |
| 1331 | if (value && *value) { |
| 1332 | vol->wsize = |
| 1333 | simple_strtoul(value, &value, 0); |
| 1334 | } |
| 1335 | } else if (strnicmp(data, "sockopt", 5) == 0) { |
Steve French | 6a5fa236 | 2010-01-01 01:28:43 +0000 | [diff] [blame] | 1336 | if (!value || !*value) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 1337 | cERROR(1, "no socket option specified"); |
Steve French | 6a5fa236 | 2010-01-01 01:28:43 +0000 | [diff] [blame] | 1338 | continue; |
| 1339 | } else if (strnicmp(value, "TCP_NODELAY", 11) == 0) { |
| 1340 | vol->sockopt_tcp_nodelay = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1341 | } |
| 1342 | } else if (strnicmp(data, "netbiosname", 4) == 0) { |
| 1343 | if (!value || !*value || (*value == ' ')) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 1344 | cFYI(1, "invalid (empty) netbiosname"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1345 | } else { |
Jeff Layton | 1397f2e | 2011-01-07 11:30:28 -0500 | [diff] [blame] | 1346 | memset(vol->source_rfc1001_name, 0x20, |
| 1347 | RFC1001_NAME_LEN); |
| 1348 | /* |
| 1349 | * FIXME: are there cases in which a comma can |
| 1350 | * be valid in workstation netbios name (and |
| 1351 | * need special handling)? |
| 1352 | */ |
| 1353 | for (i = 0; i < RFC1001_NAME_LEN; i++) { |
| 1354 | /* don't ucase netbiosname for user */ |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1355 | if (value[i] == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1356 | break; |
Jeff Layton | 1397f2e | 2011-01-07 11:30:28 -0500 | [diff] [blame] | 1357 | vol->source_rfc1001_name[i] = value[i]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1358 | } |
| 1359 | /* The string has 16th byte zero still from |
| 1360 | set at top of the function */ |
Jeff Layton | 1397f2e | 2011-01-07 11:30:28 -0500 | [diff] [blame] | 1361 | if (i == RFC1001_NAME_LEN && value[i] != 0) |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1362 | printk(KERN_WARNING "CIFS: netbiosname" |
| 1363 | " longer than 15 truncated.\n"); |
Steve French | a10faeb2 | 2005-08-22 21:38:31 -0700 | [diff] [blame] | 1364 | } |
| 1365 | } else if (strnicmp(data, "servern", 7) == 0) { |
| 1366 | /* servernetbiosname specified override *SMBSERVER */ |
| 1367 | if (!value || !*value || (*value == ' ')) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 1368 | cFYI(1, "empty server netbiosname specified"); |
Steve French | a10faeb2 | 2005-08-22 21:38:31 -0700 | [diff] [blame] | 1369 | } else { |
| 1370 | /* last byte, type, is 0x20 for servr type */ |
Jeff Layton | 1397f2e | 2011-01-07 11:30:28 -0500 | [diff] [blame] | 1371 | memset(vol->target_rfc1001_name, 0x20, |
| 1372 | RFC1001_NAME_LEN_WITH_NULL); |
Steve French | a10faeb2 | 2005-08-22 21:38:31 -0700 | [diff] [blame] | 1373 | |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1374 | for (i = 0; i < 15; i++) { |
Steve French | a10faeb2 | 2005-08-22 21:38:31 -0700 | [diff] [blame] | 1375 | /* BB are there cases in which a comma can be |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1376 | valid in this workstation netbios name |
| 1377 | (and need special handling)? */ |
Steve French | a10faeb2 | 2005-08-22 21:38:31 -0700 | [diff] [blame] | 1378 | |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1379 | /* user or mount helper must uppercase |
| 1380 | the netbiosname */ |
| 1381 | if (value[i] == 0) |
Steve French | a10faeb2 | 2005-08-22 21:38:31 -0700 | [diff] [blame] | 1382 | break; |
| 1383 | else |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1384 | vol->target_rfc1001_name[i] = |
| 1385 | value[i]; |
Steve French | a10faeb2 | 2005-08-22 21:38:31 -0700 | [diff] [blame] | 1386 | } |
| 1387 | /* The string has 16th byte zero still from |
| 1388 | set at top of the function */ |
Jeff Layton | 1397f2e | 2011-01-07 11:30:28 -0500 | [diff] [blame] | 1389 | if (i == RFC1001_NAME_LEN && value[i] != 0) |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1390 | printk(KERN_WARNING "CIFS: server net" |
| 1391 | "biosname longer than 15 truncated.\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1392 | } |
Suresh Jayaraman | 6d20e84 | 2010-12-01 14:42:28 +0530 | [diff] [blame] | 1393 | } else if (strnicmp(data, "actimeo", 7) == 0) { |
| 1394 | if (value && *value) { |
| 1395 | vol->actimeo = HZ * simple_strtoul(value, |
| 1396 | &value, 0); |
| 1397 | if (vol->actimeo > CIFS_MAX_ACTIMEO) { |
| 1398 | cERROR(1, "CIFS: attribute cache" |
| 1399 | "timeout too large"); |
Sean Finney | b946845 | 2011-04-11 13:19:32 +0000 | [diff] [blame] | 1400 | goto cifs_parse_mount_err; |
Suresh Jayaraman | 6d20e84 | 2010-12-01 14:42:28 +0530 | [diff] [blame] | 1401 | } |
| 1402 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1403 | } else if (strnicmp(data, "credentials", 4) == 0) { |
| 1404 | /* ignore */ |
| 1405 | } else if (strnicmp(data, "version", 3) == 0) { |
| 1406 | /* ignore */ |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1407 | } else if (strnicmp(data, "guest", 5) == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1408 | /* ignore */ |
Steve French | c9c7fa0 | 2011-08-29 18:54:12 +0000 | [diff] [blame] | 1409 | } else if (strnicmp(data, "rw", 2) == 0 && strlen(data) == 2) { |
Steve French | 71a394f | 2009-06-26 04:07:18 +0000 | [diff] [blame] | 1410 | /* ignore */ |
| 1411 | } else if (strnicmp(data, "ro", 2) == 0) { |
| 1412 | /* ignore */ |
Steve French | edf1ae4 | 2008-10-29 00:47:57 +0000 | [diff] [blame] | 1413 | } else if (strnicmp(data, "noblocksend", 11) == 0) { |
| 1414 | vol->noblocksnd = 1; |
| 1415 | } else if (strnicmp(data, "noautotune", 10) == 0) { |
| 1416 | vol->noautotune = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1417 | } else if ((strnicmp(data, "suid", 4) == 0) || |
| 1418 | (strnicmp(data, "nosuid", 6) == 0) || |
| 1419 | (strnicmp(data, "exec", 4) == 0) || |
| 1420 | (strnicmp(data, "noexec", 6) == 0) || |
| 1421 | (strnicmp(data, "nodev", 5) == 0) || |
| 1422 | (strnicmp(data, "noauto", 6) == 0) || |
| 1423 | (strnicmp(data, "dev", 3) == 0)) { |
| 1424 | /* The mount tool or mount.cifs helper (if present) |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1425 | uses these opts to set flags, and the flags are read |
| 1426 | by the kernel vfs layer before we get here (ie |
| 1427 | before read super) so there is no point trying to |
| 1428 | parse these options again and set anything and it |
| 1429 | is ok to just ignore them */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1430 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1431 | } else if (strnicmp(data, "hard", 4) == 0) { |
| 1432 | vol->retry = 1; |
| 1433 | } else if (strnicmp(data, "soft", 4) == 0) { |
| 1434 | vol->retry = 0; |
| 1435 | } else if (strnicmp(data, "perm", 4) == 0) { |
| 1436 | vol->noperm = 0; |
| 1437 | } else if (strnicmp(data, "noperm", 6) == 0) { |
| 1438 | vol->noperm = 1; |
Steve French | 6a0b482 | 2005-04-28 22:41:05 -0700 | [diff] [blame] | 1439 | } else if (strnicmp(data, "mapchars", 8) == 0) { |
| 1440 | vol->remap = 1; |
| 1441 | } else if (strnicmp(data, "nomapchars", 10) == 0) { |
| 1442 | vol->remap = 0; |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1443 | } else if (strnicmp(data, "sfu", 3) == 0) { |
| 1444 | vol->sfu_emul = 1; |
| 1445 | } else if (strnicmp(data, "nosfu", 5) == 0) { |
| 1446 | vol->sfu_emul = 0; |
Steve French | 2c1b861 | 2008-10-16 18:35:21 +0000 | [diff] [blame] | 1447 | } else if (strnicmp(data, "nodfs", 5) == 0) { |
| 1448 | vol->nodfs = 1; |
Jeremy Allison | ac67055 | 2005-06-22 17:26:35 -0700 | [diff] [blame] | 1449 | } else if (strnicmp(data, "posixpaths", 10) == 0) { |
| 1450 | vol->posix_paths = 1; |
| 1451 | } else if (strnicmp(data, "noposixpaths", 12) == 0) { |
| 1452 | vol->posix_paths = 0; |
Steve French | c18c842 | 2007-07-18 23:21:09 +0000 | [diff] [blame] | 1453 | } else if (strnicmp(data, "nounix", 6) == 0) { |
| 1454 | vol->no_linux_ext = 1; |
| 1455 | } else if (strnicmp(data, "nolinux", 7) == 0) { |
| 1456 | vol->no_linux_ext = 1; |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1457 | } else if ((strnicmp(data, "nocase", 6) == 0) || |
Steve French | a10faeb2 | 2005-08-22 21:38:31 -0700 | [diff] [blame] | 1458 | (strnicmp(data, "ignorecase", 10) == 0)) { |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1459 | vol->nocase = 1; |
Jeff Layton | f636a34 | 2010-07-26 10:29:58 -0400 | [diff] [blame] | 1460 | } else if (strnicmp(data, "mand", 4) == 0) { |
| 1461 | /* ignore */ |
| 1462 | } else if (strnicmp(data, "nomand", 6) == 0) { |
| 1463 | /* ignore */ |
| 1464 | } else if (strnicmp(data, "_netdev", 7) == 0) { |
| 1465 | /* ignore */ |
Steve French | c46fa8a | 2005-08-18 20:49:57 -0700 | [diff] [blame] | 1466 | } else if (strnicmp(data, "brl", 3) == 0) { |
| 1467 | vol->nobrl = 0; |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1468 | } else if ((strnicmp(data, "nobrl", 5) == 0) || |
Steve French | 1c95518 | 2005-08-30 20:58:07 -0700 | [diff] [blame] | 1469 | (strnicmp(data, "nolock", 6) == 0)) { |
Steve French | c46fa8a | 2005-08-18 20:49:57 -0700 | [diff] [blame] | 1470 | vol->nobrl = 1; |
Steve French | d3485d3 | 2005-08-19 11:04:29 -0700 | [diff] [blame] | 1471 | /* turn off mandatory locking in mode |
| 1472 | if remote locking is turned off since the |
| 1473 | local vfs will do advisory */ |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1474 | if (vol->file_mode == |
| 1475 | (S_IALLUGO & ~(S_ISUID | S_IXGRP))) |
Steve French | d3485d3 | 2005-08-19 11:04:29 -0700 | [diff] [blame] | 1476 | vol->file_mode = S_IALLUGO; |
Steve French | 13a6e42 | 2008-12-02 17:24:33 +0000 | [diff] [blame] | 1477 | } else if (strnicmp(data, "forcemandatorylock", 9) == 0) { |
| 1478 | /* will take the shorter form "forcemand" as well */ |
| 1479 | /* This mount option will force use of mandatory |
| 1480 | (DOS/Windows style) byte range locks, instead of |
| 1481 | using posix advisory byte range locks, even if the |
| 1482 | Unix extensions are available and posix locks would |
| 1483 | be supported otherwise. If Unix extensions are not |
| 1484 | negotiated this has no effect since mandatory locks |
| 1485 | would be used (mandatory locks is all that those |
| 1486 | those servers support) */ |
| 1487 | vol->mand_lock = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1488 | } else if (strnicmp(data, "setuids", 7) == 0) { |
| 1489 | vol->setuids = 1; |
| 1490 | } else if (strnicmp(data, "nosetuids", 9) == 0) { |
| 1491 | vol->setuids = 0; |
Jeff Layton | d0a9c07 | 2008-05-12 22:23:49 +0000 | [diff] [blame] | 1492 | } else if (strnicmp(data, "dynperm", 7) == 0) { |
| 1493 | vol->dynperm = true; |
| 1494 | } else if (strnicmp(data, "nodynperm", 9) == 0) { |
| 1495 | vol->dynperm = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1496 | } else if (strnicmp(data, "nohard", 6) == 0) { |
| 1497 | vol->retry = 0; |
| 1498 | } else if (strnicmp(data, "nosoft", 6) == 0) { |
| 1499 | vol->retry = 1; |
| 1500 | } else if (strnicmp(data, "nointr", 6) == 0) { |
| 1501 | vol->intr = 0; |
| 1502 | } else if (strnicmp(data, "intr", 4) == 0) { |
| 1503 | vol->intr = 1; |
Steve French | be65244 | 2009-02-23 15:21:59 +0000 | [diff] [blame] | 1504 | } else if (strnicmp(data, "nostrictsync", 12) == 0) { |
| 1505 | vol->nostrictsync = 1; |
| 1506 | } else if (strnicmp(data, "strictsync", 10) == 0) { |
| 1507 | vol->nostrictsync = 0; |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1508 | } else if (strnicmp(data, "serverino", 7) == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1509 | vol->server_ino = 1; |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1510 | } else if (strnicmp(data, "noserverino", 9) == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1511 | vol->server_ino = 0; |
Steve French | c9c7fa0 | 2011-08-29 18:54:12 +0000 | [diff] [blame] | 1512 | } else if (strnicmp(data, "rwpidforward", 12) == 0) { |
Pavel Shilovsky | d4ffff1 | 2011-05-26 06:02:00 +0000 | [diff] [blame] | 1513 | vol->rwpidforward = 1; |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1514 | } else if (strnicmp(data, "cifsacl", 7) == 0) { |
Steve French | 0a4b92c | 2006-01-12 15:44:21 -0800 | [diff] [blame] | 1515 | vol->cifs_acl = 1; |
| 1516 | } else if (strnicmp(data, "nocifsacl", 9) == 0) { |
| 1517 | vol->cifs_acl = 0; |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1518 | } else if (strnicmp(data, "acl", 3) == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1519 | vol->no_psx_acl = 0; |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1520 | } else if (strnicmp(data, "noacl", 5) == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1521 | vol->no_psx_acl = 1; |
Steve French | 84210e9 | 2008-10-23 04:42:37 +0000 | [diff] [blame] | 1522 | } else if (strnicmp(data, "locallease", 6) == 0) { |
| 1523 | vol->local_lease = 1; |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1524 | } else if (strnicmp(data, "sign", 4) == 0) { |
Steve French | 750d115 | 2006-06-27 06:28:30 +0000 | [diff] [blame] | 1525 | vol->secFlg |= CIFSSEC_MUST_SIGN; |
Steve French | 95b1cb9 | 2008-05-15 16:44:38 +0000 | [diff] [blame] | 1526 | } else if (strnicmp(data, "seal", 4) == 0) { |
| 1527 | /* we do not do the following in secFlags because seal |
| 1528 | is a per tree connection (mount) not a per socket |
| 1529 | or per-smb connection option in the protocol */ |
| 1530 | /* vol->secFlg |= CIFSSEC_MUST_SEAL; */ |
| 1531 | vol->seal = 1; |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1532 | } else if (strnicmp(data, "direct", 6) == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1533 | vol->direct_io = 1; |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1534 | } else if (strnicmp(data, "forcedirectio", 13) == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1535 | vol->direct_io = 1; |
Pavel Shilovsky | d39454f | 2011-01-24 14:16:35 -0500 | [diff] [blame] | 1536 | } else if (strnicmp(data, "strictcache", 11) == 0) { |
| 1537 | vol->strict_io = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1538 | } else if (strnicmp(data, "noac", 4) == 0) { |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1539 | printk(KERN_WARNING "CIFS: Mount option noac not " |
| 1540 | "supported. Instead set " |
| 1541 | "/proc/fs/cifs/LookupCacheEnabled to 0\n"); |
Suresh Jayaraman | fa1df75 | 2010-07-05 18:13:36 +0530 | [diff] [blame] | 1542 | } else if (strnicmp(data, "fsc", 3) == 0) { |
Suresh Jayaraman | 607a569 | 2010-11-24 17:49:05 +0530 | [diff] [blame] | 1543 | #ifndef CONFIG_CIFS_FSCACHE |
Jeff Layton | 83fb086 | 2011-06-08 07:35:24 -0400 | [diff] [blame] | 1544 | cERROR(1, "FS-Cache support needs CONFIG_CIFS_FSCACHE " |
Suresh Jayaraman | 607a569 | 2010-11-24 17:49:05 +0530 | [diff] [blame] | 1545 | "kernel config option set"); |
Sean Finney | b946845 | 2011-04-11 13:19:32 +0000 | [diff] [blame] | 1546 | goto cifs_parse_mount_err; |
Suresh Jayaraman | 607a569 | 2010-11-24 17:49:05 +0530 | [diff] [blame] | 1547 | #endif |
Suresh Jayaraman | fa1df75 | 2010-07-05 18:13:36 +0530 | [diff] [blame] | 1548 | vol->fsc = true; |
Stefan Metzmacher | 736a332 | 2010-07-30 14:56:00 +0200 | [diff] [blame] | 1549 | } else if (strnicmp(data, "mfsymlinks", 10) == 0) { |
| 1550 | vol->mfsymlinks = true; |
Jeff Layton | 0eb8a13 | 2010-10-06 19:51:12 -0400 | [diff] [blame] | 1551 | } else if (strnicmp(data, "multiuser", 8) == 0) { |
| 1552 | vol->multiuser = true; |
Shirish Pargaonkar | 3d3ea8e | 2011-09-26 09:56:44 -0500 | [diff] [blame] | 1553 | } else if (!strnicmp(data, "backupuid", 9) && value && *value) { |
| 1554 | err = kstrtouint(value, 0, &vol->backupuid); |
| 1555 | if (err < 0) { |
| 1556 | cERROR(1, "%s: Invalid backupuid value", |
| 1557 | __func__); |
| 1558 | goto cifs_parse_mount_err; |
| 1559 | } |
| 1560 | vol->backupuid_specified = true; |
| 1561 | } else if (!strnicmp(data, "backupgid", 9) && value && *value) { |
| 1562 | err = kstrtouint(value, 0, &vol->backupgid); |
| 1563 | if (err < 0) { |
| 1564 | cERROR(1, "%s: Invalid backupgid value", |
| 1565 | __func__); |
| 1566 | goto cifs_parse_mount_err; |
| 1567 | } |
| 1568 | vol->backupgid_specified = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1569 | } else |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1570 | printk(KERN_WARNING "CIFS: Unknown mount option %s\n", |
| 1571 | data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1572 | } |
| 1573 | if (vol->UNC == NULL) { |
Steve French | 4523cc3 | 2007-04-30 20:13:06 +0000 | [diff] [blame] | 1574 | if (devname == NULL) { |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1575 | printk(KERN_WARNING "CIFS: Missing UNC name for mount " |
| 1576 | "target\n"); |
Sean Finney | b946845 | 2011-04-11 13:19:32 +0000 | [diff] [blame] | 1577 | goto cifs_parse_mount_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1578 | } |
| 1579 | if ((temp_len = strnlen(devname, 300)) < 300) { |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1580 | vol->UNC = kmalloc(temp_len+1, GFP_KERNEL); |
Steve French | 4523cc3 | 2007-04-30 20:13:06 +0000 | [diff] [blame] | 1581 | if (vol->UNC == NULL) |
Sean Finney | b946845 | 2011-04-11 13:19:32 +0000 | [diff] [blame] | 1582 | goto cifs_parse_mount_err; |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1583 | strcpy(vol->UNC, devname); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1584 | if (strncmp(vol->UNC, "//", 2) == 0) { |
| 1585 | vol->UNC[0] = '\\'; |
| 1586 | vol->UNC[1] = '\\'; |
| 1587 | } else if (strncmp(vol->UNC, "\\\\", 2) != 0) { |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1588 | printk(KERN_WARNING "CIFS: UNC Path does not " |
| 1589 | "begin with // or \\\\ \n"); |
Sean Finney | b946845 | 2011-04-11 13:19:32 +0000 | [diff] [blame] | 1590 | goto cifs_parse_mount_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1591 | } |
Igor Mammedov | 7c5e628 | 2008-05-08 20:48:42 +0000 | [diff] [blame] | 1592 | value = strpbrk(vol->UNC+2, "/\\"); |
| 1593 | if (value) |
| 1594 | *value = '\\'; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1595 | } else { |
| 1596 | printk(KERN_WARNING "CIFS: UNC name too long\n"); |
Sean Finney | b946845 | 2011-04-11 13:19:32 +0000 | [diff] [blame] | 1597 | goto cifs_parse_mount_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1598 | } |
| 1599 | } |
Jeff Layton | 0eb8a13 | 2010-10-06 19:51:12 -0400 | [diff] [blame] | 1600 | |
Jeff Layton | 8a8798a | 2012-01-17 16:09:15 -0500 | [diff] [blame] | 1601 | #ifndef CONFIG_KEYS |
| 1602 | /* Muliuser mounts require CONFIG_KEYS support */ |
| 1603 | if (vol->multiuser) { |
| 1604 | cERROR(1, "Multiuser mounts require kernels with " |
| 1605 | "CONFIG_KEYS enabled."); |
Sean Finney | b946845 | 2011-04-11 13:19:32 +0000 | [diff] [blame] | 1606 | goto cifs_parse_mount_err; |
Jeff Layton | 0eb8a13 | 2010-10-06 19:51:12 -0400 | [diff] [blame] | 1607 | } |
Jeff Layton | 8a8798a | 2012-01-17 16:09:15 -0500 | [diff] [blame] | 1608 | #endif |
Jeff Layton | 0eb8a13 | 2010-10-06 19:51:12 -0400 | [diff] [blame] | 1609 | |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 1610 | if (vol->UNCip == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1611 | vol->UNCip = &vol->UNC[2]; |
| 1612 | |
Jeff Layton | 9b9d6b24 | 2009-07-31 06:56:09 -0400 | [diff] [blame] | 1613 | if (uid_specified) |
| 1614 | vol->override_uid = override_uid; |
| 1615 | else if (override_uid == 1) |
| 1616 | printk(KERN_NOTICE "CIFS: ignoring forceuid mount option " |
| 1617 | "specified with no uid= option.\n"); |
| 1618 | |
| 1619 | if (gid_specified) |
| 1620 | vol->override_gid = override_gid; |
| 1621 | else if (override_gid == 1) |
| 1622 | printk(KERN_NOTICE "CIFS: ignoring forcegid mount option " |
| 1623 | "specified with no gid= option.\n"); |
| 1624 | |
Sean Finney | b946845 | 2011-04-11 13:19:32 +0000 | [diff] [blame] | 1625 | kfree(mountdata_copy); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1626 | return 0; |
Sean Finney | b946845 | 2011-04-11 13:19:32 +0000 | [diff] [blame] | 1627 | |
| 1628 | cifs_parse_mount_err: |
| 1629 | kfree(mountdata_copy); |
| 1630 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1631 | } |
| 1632 | |
Ben Greear | 3eb9a88 | 2010-09-01 17:06:02 -0700 | [diff] [blame] | 1633 | /** Returns true if srcaddr isn't specified and rhs isn't |
| 1634 | * specified, or if srcaddr is specified and |
| 1635 | * matches the IP address of the rhs argument. |
| 1636 | */ |
Jeff Layton | 4515148 | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 1637 | static bool |
Ben Greear | 3eb9a88 | 2010-09-01 17:06:02 -0700 | [diff] [blame] | 1638 | srcip_matches(struct sockaddr *srcaddr, struct sockaddr *rhs) |
| 1639 | { |
| 1640 | switch (srcaddr->sa_family) { |
| 1641 | case AF_UNSPEC: |
| 1642 | return (rhs->sa_family == AF_UNSPEC); |
| 1643 | case AF_INET: { |
| 1644 | struct sockaddr_in *saddr4 = (struct sockaddr_in *)srcaddr; |
| 1645 | struct sockaddr_in *vaddr4 = (struct sockaddr_in *)rhs; |
| 1646 | return (saddr4->sin_addr.s_addr == vaddr4->sin_addr.s_addr); |
| 1647 | } |
| 1648 | case AF_INET6: { |
| 1649 | struct sockaddr_in6 *saddr6 = (struct sockaddr_in6 *)srcaddr; |
| 1650 | struct sockaddr_in6 *vaddr6 = (struct sockaddr_in6 *)&rhs; |
| 1651 | return ipv6_addr_equal(&saddr6->sin6_addr, &vaddr6->sin6_addr); |
| 1652 | } |
| 1653 | default: |
| 1654 | WARN_ON(1); |
| 1655 | return false; /* don't expect to be here */ |
| 1656 | } |
| 1657 | } |
| 1658 | |
Pavel Shilovsky | 4b88613 | 2010-12-13 22:18:07 +0300 | [diff] [blame] | 1659 | /* |
| 1660 | * If no port is specified in addr structure, we try to match with 445 port |
| 1661 | * and if it fails - with 139 ports. It should be called only if address |
| 1662 | * families of server and addr are equal. |
| 1663 | */ |
| 1664 | static bool |
| 1665 | match_port(struct TCP_Server_Info *server, struct sockaddr *addr) |
| 1666 | { |
Steve French | 6da9791 | 2011-03-13 18:55:55 +0000 | [diff] [blame] | 1667 | __be16 port, *sport; |
Pavel Shilovsky | 4b88613 | 2010-12-13 22:18:07 +0300 | [diff] [blame] | 1668 | |
| 1669 | switch (addr->sa_family) { |
| 1670 | case AF_INET: |
| 1671 | sport = &((struct sockaddr_in *) &server->dstaddr)->sin_port; |
| 1672 | port = ((struct sockaddr_in *) addr)->sin_port; |
| 1673 | break; |
| 1674 | case AF_INET6: |
| 1675 | sport = &((struct sockaddr_in6 *) &server->dstaddr)->sin6_port; |
| 1676 | port = ((struct sockaddr_in6 *) addr)->sin6_port; |
| 1677 | break; |
| 1678 | default: |
| 1679 | WARN_ON(1); |
| 1680 | return false; |
| 1681 | } |
| 1682 | |
| 1683 | if (!port) { |
| 1684 | port = htons(CIFS_PORT); |
| 1685 | if (port == *sport) |
| 1686 | return true; |
| 1687 | |
| 1688 | port = htons(RFC1001_PORT); |
| 1689 | } |
| 1690 | |
| 1691 | return port == *sport; |
| 1692 | } |
Ben Greear | 3eb9a88 | 2010-09-01 17:06:02 -0700 | [diff] [blame] | 1693 | |
| 1694 | static bool |
| 1695 | match_address(struct TCP_Server_Info *server, struct sockaddr *addr, |
| 1696 | struct sockaddr *srcaddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1697 | { |
Jeff Layton | 4515148 | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 1698 | switch (addr->sa_family) { |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 1699 | case AF_INET: { |
| 1700 | struct sockaddr_in *addr4 = (struct sockaddr_in *)addr; |
| 1701 | struct sockaddr_in *srv_addr4 = |
| 1702 | (struct sockaddr_in *)&server->dstaddr; |
| 1703 | |
| 1704 | if (addr4->sin_addr.s_addr != srv_addr4->sin_addr.s_addr) |
Jeff Layton | 4515148 | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 1705 | return false; |
Jeff Layton | 4515148 | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 1706 | break; |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 1707 | } |
| 1708 | case AF_INET6: { |
| 1709 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr; |
| 1710 | struct sockaddr_in6 *srv_addr6 = |
| 1711 | (struct sockaddr_in6 *)&server->dstaddr; |
| 1712 | |
Jeff Layton | 4515148 | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 1713 | if (!ipv6_addr_equal(&addr6->sin6_addr, |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 1714 | &srv_addr6->sin6_addr)) |
Jeff Layton | 4515148 | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 1715 | return false; |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 1716 | if (addr6->sin6_scope_id != srv_addr6->sin6_scope_id) |
Jeff Layton | 4515148 | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 1717 | return false; |
Jeff Layton | 4515148 | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 1718 | break; |
| 1719 | } |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 1720 | default: |
| 1721 | WARN_ON(1); |
| 1722 | return false; /* don't expect to be here */ |
| 1723 | } |
Jeff Layton | 4515148 | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 1724 | |
Ben Greear | 3eb9a88 | 2010-09-01 17:06:02 -0700 | [diff] [blame] | 1725 | if (!srcip_matches(srcaddr, (struct sockaddr *)&server->srcaddr)) |
| 1726 | return false; |
| 1727 | |
Jeff Layton | 4515148 | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 1728 | return true; |
| 1729 | } |
| 1730 | |
Jeff Layton | daf5b0b | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 1731 | static bool |
| 1732 | match_security(struct TCP_Server_Info *server, struct smb_vol *vol) |
| 1733 | { |
| 1734 | unsigned int secFlags; |
| 1735 | |
| 1736 | if (vol->secFlg & (~(CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL))) |
| 1737 | secFlags = vol->secFlg; |
| 1738 | else |
| 1739 | secFlags = global_secflags | vol->secFlg; |
| 1740 | |
| 1741 | switch (server->secType) { |
| 1742 | case LANMAN: |
| 1743 | if (!(secFlags & (CIFSSEC_MAY_LANMAN|CIFSSEC_MAY_PLNTXT))) |
| 1744 | return false; |
| 1745 | break; |
| 1746 | case NTLMv2: |
| 1747 | if (!(secFlags & CIFSSEC_MAY_NTLMV2)) |
| 1748 | return false; |
| 1749 | break; |
| 1750 | case NTLM: |
| 1751 | if (!(secFlags & CIFSSEC_MAY_NTLM)) |
| 1752 | return false; |
| 1753 | break; |
| 1754 | case Kerberos: |
| 1755 | if (!(secFlags & CIFSSEC_MAY_KRB5)) |
| 1756 | return false; |
| 1757 | break; |
| 1758 | case RawNTLMSSP: |
| 1759 | if (!(secFlags & CIFSSEC_MAY_NTLMSSP)) |
| 1760 | return false; |
| 1761 | break; |
| 1762 | default: |
| 1763 | /* shouldn't happen */ |
| 1764 | return false; |
| 1765 | } |
| 1766 | |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 1767 | /* now check if signing mode is acceptable */ |
Jeff Layton | daf5b0b | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 1768 | if ((secFlags & CIFSSEC_MAY_SIGN) == 0 && |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 1769 | (server->sec_mode & SECMODE_SIGN_REQUIRED)) |
Jeff Layton | daf5b0b | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 1770 | return false; |
| 1771 | else if (((secFlags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN) && |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 1772 | (server->sec_mode & |
Jeff Layton | daf5b0b | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 1773 | (SECMODE_SIGN_ENABLED|SECMODE_SIGN_REQUIRED)) == 0) |
| 1774 | return false; |
| 1775 | |
| 1776 | return true; |
| 1777 | } |
| 1778 | |
Pavel Shilovsky | 37bb04e | 2011-05-05 09:55:11 +0000 | [diff] [blame] | 1779 | static int match_server(struct TCP_Server_Info *server, struct sockaddr *addr, |
| 1780 | struct smb_vol *vol) |
| 1781 | { |
| 1782 | if (!net_eq(cifs_net_ns(server), current->nsproxy->net_ns)) |
| 1783 | return 0; |
| 1784 | |
| 1785 | if (!match_address(server, addr, |
| 1786 | (struct sockaddr *)&vol->srcaddr)) |
| 1787 | return 0; |
| 1788 | |
| 1789 | if (!match_port(server, addr)) |
| 1790 | return 0; |
| 1791 | |
| 1792 | if (!match_security(server, vol)) |
| 1793 | return 0; |
| 1794 | |
| 1795 | return 1; |
| 1796 | } |
| 1797 | |
Jeff Layton | 4515148 | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 1798 | static struct TCP_Server_Info * |
Jeff Layton | daf5b0b | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 1799 | cifs_find_tcp_session(struct sockaddr *addr, struct smb_vol *vol) |
Jeff Layton | 4515148 | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 1800 | { |
Jeff Layton | e7ddee9 | 2008-11-14 13:44:38 -0500 | [diff] [blame] | 1801 | struct TCP_Server_Info *server; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1802 | |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 1803 | spin_lock(&cifs_tcp_ses_lock); |
Jeff Layton | 4515148 | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 1804 | list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) { |
Pavel Shilovsky | 37bb04e | 2011-05-05 09:55:11 +0000 | [diff] [blame] | 1805 | if (!match_server(server, addr, vol)) |
Jeff Layton | daf5b0b | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 1806 | continue; |
| 1807 | |
Jeff Layton | e7ddee9 | 2008-11-14 13:44:38 -0500 | [diff] [blame] | 1808 | ++server->srv_count; |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 1809 | spin_unlock(&cifs_tcp_ses_lock); |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 1810 | cFYI(1, "Existing tcp session with server found"); |
Jeff Layton | e7ddee9 | 2008-11-14 13:44:38 -0500 | [diff] [blame] | 1811 | return server; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1812 | } |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 1813 | spin_unlock(&cifs_tcp_ses_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1814 | return NULL; |
| 1815 | } |
| 1816 | |
Jeff Layton | 14fbf50 | 2008-11-14 13:53:46 -0500 | [diff] [blame] | 1817 | static void |
Jeff Layton | e7ddee9 | 2008-11-14 13:44:38 -0500 | [diff] [blame] | 1818 | cifs_put_tcp_session(struct TCP_Server_Info *server) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1819 | { |
Jeff Layton | e7ddee9 | 2008-11-14 13:44:38 -0500 | [diff] [blame] | 1820 | struct task_struct *task; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1821 | |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 1822 | spin_lock(&cifs_tcp_ses_lock); |
Jeff Layton | e7ddee9 | 2008-11-14 13:44:38 -0500 | [diff] [blame] | 1823 | if (--server->srv_count > 0) { |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 1824 | spin_unlock(&cifs_tcp_ses_lock); |
Jeff Layton | e7ddee9 | 2008-11-14 13:44:38 -0500 | [diff] [blame] | 1825 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1826 | } |
Steve French | dea570e0 | 2008-05-06 22:05:51 +0000 | [diff] [blame] | 1827 | |
Rob Landley | f1d0c99 | 2011-01-22 15:44:05 -0600 | [diff] [blame] | 1828 | put_net(cifs_net_ns(server)); |
| 1829 | |
Jeff Layton | e7ddee9 | 2008-11-14 13:44:38 -0500 | [diff] [blame] | 1830 | list_del_init(&server->tcp_ses_list); |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 1831 | spin_unlock(&cifs_tcp_ses_lock); |
Jeff Layton | e7ddee9 | 2008-11-14 13:44:38 -0500 | [diff] [blame] | 1832 | |
Jeff Layton | c74093b | 2011-01-11 07:24:23 -0500 | [diff] [blame] | 1833 | cancel_delayed_work_sync(&server->echo); |
| 1834 | |
Jeff Layton | e7ddee9 | 2008-11-14 13:44:38 -0500 | [diff] [blame] | 1835 | spin_lock(&GlobalMid_Lock); |
| 1836 | server->tcpStatus = CifsExiting; |
| 1837 | spin_unlock(&GlobalMid_Lock); |
| 1838 | |
Shirish Pargaonkar | d2b9152 | 2010-10-21 14:25:08 -0500 | [diff] [blame] | 1839 | cifs_crypto_shash_release(server); |
Suresh Jayaraman | 488f1d2d | 2010-07-05 18:12:15 +0530 | [diff] [blame] | 1840 | cifs_fscache_release_client_cookie(server); |
| 1841 | |
Shirish Pargaonkar | 21e7339 | 2010-10-21 06:42:55 -0500 | [diff] [blame] | 1842 | kfree(server->session_key.response); |
| 1843 | server->session_key.response = NULL; |
| 1844 | server->session_key.len = 0; |
| 1845 | |
Jeff Layton | e7ddee9 | 2008-11-14 13:44:38 -0500 | [diff] [blame] | 1846 | task = xchg(&server->tsk, NULL); |
| 1847 | if (task) |
| 1848 | force_sig(SIGKILL, task); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1849 | } |
| 1850 | |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 1851 | static struct TCP_Server_Info * |
| 1852 | cifs_get_tcp_session(struct smb_vol *volume_info) |
| 1853 | { |
| 1854 | struct TCP_Server_Info *tcp_ses = NULL; |
Jeff Layton | a9ac49d | 2009-01-22 14:43:21 -0500 | [diff] [blame] | 1855 | struct sockaddr_storage addr; |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 1856 | struct sockaddr_in *sin_server = (struct sockaddr_in *) &addr; |
| 1857 | struct sockaddr_in6 *sin_server6 = (struct sockaddr_in6 *) &addr; |
| 1858 | int rc; |
| 1859 | |
Jeff Layton | a9ac49d | 2009-01-22 14:43:21 -0500 | [diff] [blame] | 1860 | memset(&addr, 0, sizeof(struct sockaddr_storage)); |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 1861 | |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 1862 | cFYI(1, "UNC: %s ip: %s", volume_info->UNC, volume_info->UNCip); |
Jeff Layton | 1e68b2b | 2009-06-11 10:27:30 -0400 | [diff] [blame] | 1863 | |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 1864 | if (volume_info->UNCip && volume_info->UNC) { |
Jeff Layton | 50d9716 | 2010-07-06 20:43:01 -0400 | [diff] [blame] | 1865 | rc = cifs_fill_sockaddr((struct sockaddr *)&addr, |
| 1866 | volume_info->UNCip, |
David Howells | 67b7626 | 2010-07-22 18:33:01 +0100 | [diff] [blame] | 1867 | strlen(volume_info->UNCip), |
Jeff Layton | 50d9716 | 2010-07-06 20:43:01 -0400 | [diff] [blame] | 1868 | volume_info->port); |
Jeff Layton | 1e68b2b | 2009-06-11 10:27:30 -0400 | [diff] [blame] | 1869 | if (!rc) { |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 1870 | /* we failed translating address */ |
| 1871 | rc = -EINVAL; |
| 1872 | goto out_err; |
| 1873 | } |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 1874 | } else if (volume_info->UNCip) { |
| 1875 | /* BB using ip addr as tcp_ses name to connect to the |
| 1876 | DFS root below */ |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 1877 | cERROR(1, "Connecting to DFS root not implemented yet"); |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 1878 | rc = -EINVAL; |
| 1879 | goto out_err; |
| 1880 | } else /* which tcp_sess DFS root would we conect to */ { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 1881 | cERROR(1, "CIFS mount error: No UNC path (e.g. -o " |
| 1882 | "unc=//192.168.1.100/public) specified"); |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 1883 | rc = -EINVAL; |
| 1884 | goto out_err; |
| 1885 | } |
| 1886 | |
| 1887 | /* see if we already have a matching tcp_ses */ |
Jeff Layton | daf5b0b | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 1888 | tcp_ses = cifs_find_tcp_session((struct sockaddr *)&addr, volume_info); |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 1889 | if (tcp_ses) |
| 1890 | return tcp_ses; |
| 1891 | |
| 1892 | tcp_ses = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL); |
| 1893 | if (!tcp_ses) { |
| 1894 | rc = -ENOMEM; |
| 1895 | goto out_err; |
| 1896 | } |
| 1897 | |
Shirish Pargaonkar | d2b9152 | 2010-10-21 14:25:08 -0500 | [diff] [blame] | 1898 | rc = cifs_crypto_shash_allocate(tcp_ses); |
| 1899 | if (rc) { |
| 1900 | cERROR(1, "could not setup hash structures rc %d", rc); |
| 1901 | goto out_err; |
| 1902 | } |
| 1903 | |
Rob Landley | f1d0c99 | 2011-01-22 15:44:05 -0600 | [diff] [blame] | 1904 | cifs_set_net_ns(tcp_ses, get_net(current->nsproxy->net_ns)); |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 1905 | tcp_ses->hostname = extract_hostname(volume_info->UNC); |
| 1906 | if (IS_ERR(tcp_ses->hostname)) { |
| 1907 | rc = PTR_ERR(tcp_ses->hostname); |
Shirish Pargaonkar | f7c5445 | 2010-10-26 18:10:24 -0500 | [diff] [blame] | 1908 | goto out_err_crypto_release; |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 1909 | } |
| 1910 | |
| 1911 | tcp_ses->noblocksnd = volume_info->noblocksnd; |
| 1912 | tcp_ses->noautotune = volume_info->noautotune; |
Steve French | 6a5fa236 | 2010-01-01 01:28:43 +0000 | [diff] [blame] | 1913 | tcp_ses->tcp_nodelay = volume_info->sockopt_tcp_nodelay; |
Pavel Shilovsky | fc40f9c | 2012-02-17 17:09:12 +0300 | [diff] [blame] | 1914 | tcp_ses->in_flight = 0; |
Pavel Shilovsky | 2d86dbc | 2012-02-06 15:59:18 +0400 | [diff] [blame] | 1915 | tcp_ses->credits = 1; |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 1916 | init_waitqueue_head(&tcp_ses->response_q); |
| 1917 | init_waitqueue_head(&tcp_ses->request_q); |
| 1918 | INIT_LIST_HEAD(&tcp_ses->pending_mid_q); |
| 1919 | mutex_init(&tcp_ses->srv_mutex); |
| 1920 | memcpy(tcp_ses->workstation_RFC1001_name, |
| 1921 | volume_info->source_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL); |
| 1922 | memcpy(tcp_ses->server_RFC1001_name, |
| 1923 | volume_info->target_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL); |
Shirish Pargaonkar | 5d0d288 | 2010-10-13 18:15:00 -0500 | [diff] [blame] | 1924 | tcp_ses->session_estab = false; |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 1925 | tcp_ses->sequence_number = 0; |
Steve French | fda3594 | 2011-01-20 18:06:34 +0000 | [diff] [blame] | 1926 | tcp_ses->lstrp = jiffies; |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 1927 | INIT_LIST_HEAD(&tcp_ses->tcp_ses_list); |
| 1928 | INIT_LIST_HEAD(&tcp_ses->smb_ses_list); |
Jeff Layton | c74093b | 2011-01-11 07:24:23 -0500 | [diff] [blame] | 1929 | INIT_DELAYED_WORK(&tcp_ses->echo, cifs_echo_request); |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 1930 | |
| 1931 | /* |
| 1932 | * at this point we are the only ones with the pointer |
| 1933 | * to the struct since the kernel thread not created yet |
| 1934 | * no need to spinlock this init of tcpStatus or srv_count |
| 1935 | */ |
| 1936 | tcp_ses->tcpStatus = CifsNew; |
Ben Greear | 3eb9a88 | 2010-09-01 17:06:02 -0700 | [diff] [blame] | 1937 | memcpy(&tcp_ses->srcaddr, &volume_info->srcaddr, |
| 1938 | sizeof(tcp_ses->srcaddr)); |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 1939 | ++tcp_ses->srv_count; |
| 1940 | |
Jeff Layton | a9ac49d | 2009-01-22 14:43:21 -0500 | [diff] [blame] | 1941 | if (addr.ss_family == AF_INET6) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 1942 | cFYI(1, "attempting ipv6 connect"); |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 1943 | /* BB should we allow ipv6 on port 139? */ |
| 1944 | /* other OS never observed in Wild doing 139 with v6 */ |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 1945 | memcpy(&tcp_ses->dstaddr, sin_server6, |
| 1946 | sizeof(struct sockaddr_in6)); |
| 1947 | } else |
| 1948 | memcpy(&tcp_ses->dstaddr, sin_server, |
| 1949 | sizeof(struct sockaddr_in)); |
| 1950 | |
| 1951 | rc = ip_connect(tcp_ses); |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 1952 | if (rc < 0) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 1953 | cERROR(1, "Error connecting to socket. Aborting operation"); |
Shirish Pargaonkar | f7c5445 | 2010-10-26 18:10:24 -0500 | [diff] [blame] | 1954 | goto out_err_crypto_release; |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 1955 | } |
| 1956 | |
| 1957 | /* |
| 1958 | * since we're in a cifs function already, we know that |
| 1959 | * this will succeed. No need for try_module_get(). |
| 1960 | */ |
| 1961 | __module_get(THIS_MODULE); |
Al Viro | 7c97c20 | 2011-06-21 08:51:28 -0400 | [diff] [blame] | 1962 | tcp_ses->tsk = kthread_run(cifs_demultiplex_thread, |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 1963 | tcp_ses, "cifsd"); |
| 1964 | if (IS_ERR(tcp_ses->tsk)) { |
| 1965 | rc = PTR_ERR(tcp_ses->tsk); |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 1966 | cERROR(1, "error %d create cifsd thread", rc); |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 1967 | module_put(THIS_MODULE); |
Shirish Pargaonkar | f7c5445 | 2010-10-26 18:10:24 -0500 | [diff] [blame] | 1968 | goto out_err_crypto_release; |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 1969 | } |
Steve French | fd88ce9 | 2011-04-12 01:01:14 +0000 | [diff] [blame] | 1970 | tcp_ses->tcpStatus = CifsNeedNegotiate; |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 1971 | |
| 1972 | /* thread spawned, put it on the list */ |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 1973 | spin_lock(&cifs_tcp_ses_lock); |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 1974 | list_add(&tcp_ses->tcp_ses_list, &cifs_tcp_ses_list); |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 1975 | spin_unlock(&cifs_tcp_ses_lock); |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 1976 | |
Suresh Jayaraman | 488f1d2d | 2010-07-05 18:12:15 +0530 | [diff] [blame] | 1977 | cifs_fscache_get_client_cookie(tcp_ses); |
| 1978 | |
Jeff Layton | c74093b | 2011-01-11 07:24:23 -0500 | [diff] [blame] | 1979 | /* queue echo request delayed work */ |
| 1980 | queue_delayed_work(system_nrt_wq, &tcp_ses->echo, SMB_ECHO_INTERVAL); |
| 1981 | |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 1982 | return tcp_ses; |
| 1983 | |
Shirish Pargaonkar | f7c5445 | 2010-10-26 18:10:24 -0500 | [diff] [blame] | 1984 | out_err_crypto_release: |
Shirish Pargaonkar | d2b9152 | 2010-10-21 14:25:08 -0500 | [diff] [blame] | 1985 | cifs_crypto_shash_release(tcp_ses); |
| 1986 | |
Rob Landley | f1d0c99 | 2011-01-22 15:44:05 -0600 | [diff] [blame] | 1987 | put_net(cifs_net_ns(tcp_ses)); |
| 1988 | |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 1989 | out_err: |
| 1990 | if (tcp_ses) { |
Steve French | 8347a5c | 2009-10-06 18:31:29 +0000 | [diff] [blame] | 1991 | if (!IS_ERR(tcp_ses->hostname)) |
| 1992 | kfree(tcp_ses->hostname); |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 1993 | if (tcp_ses->ssocket) |
| 1994 | sock_release(tcp_ses->ssocket); |
| 1995 | kfree(tcp_ses); |
| 1996 | } |
| 1997 | return ERR_PTR(rc); |
| 1998 | } |
| 1999 | |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 2000 | static int match_session(struct cifs_ses *ses, struct smb_vol *vol) |
Pavel Shilovsky | 37bb04e | 2011-05-05 09:55:11 +0000 | [diff] [blame] | 2001 | { |
| 2002 | switch (ses->server->secType) { |
| 2003 | case Kerberos: |
| 2004 | if (vol->cred_uid != ses->cred_uid) |
| 2005 | return 0; |
| 2006 | break; |
| 2007 | default: |
Jeff Layton | 04febab | 2012-01-17 16:09:15 -0500 | [diff] [blame] | 2008 | /* NULL username means anonymous session */ |
| 2009 | if (ses->user_name == NULL) { |
| 2010 | if (!vol->nullauth) |
| 2011 | return 0; |
| 2012 | break; |
| 2013 | } |
| 2014 | |
Pavel Shilovsky | 37bb04e | 2011-05-05 09:55:11 +0000 | [diff] [blame] | 2015 | /* anything else takes username/password */ |
Jeff Layton | 04febab | 2012-01-17 16:09:15 -0500 | [diff] [blame] | 2016 | if (strncmp(ses->user_name, |
| 2017 | vol->username ? vol->username : "", |
Pavel Shilovsky | 37bb04e | 2011-05-05 09:55:11 +0000 | [diff] [blame] | 2018 | MAX_USERNAME_SIZE)) |
| 2019 | return 0; |
| 2020 | if (strlen(vol->username) != 0 && |
| 2021 | ses->password != NULL && |
| 2022 | strncmp(ses->password, |
| 2023 | vol->password ? vol->password : "", |
| 2024 | MAX_PASSWORD_SIZE)) |
| 2025 | return 0; |
| 2026 | } |
| 2027 | return 1; |
| 2028 | } |
| 2029 | |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 2030 | static struct cifs_ses * |
Jeff Layton | 4ff67b7 | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 2031 | cifs_find_smb_ses(struct TCP_Server_Info *server, struct smb_vol *vol) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2032 | { |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 2033 | struct cifs_ses *ses; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2034 | |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 2035 | spin_lock(&cifs_tcp_ses_lock); |
Jeff Layton | 4ff67b7 | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 2036 | list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) { |
Pavel Shilovsky | 37bb04e | 2011-05-05 09:55:11 +0000 | [diff] [blame] | 2037 | if (!match_session(ses, vol)) |
| 2038 | continue; |
Jeff Layton | 14fbf50 | 2008-11-14 13:53:46 -0500 | [diff] [blame] | 2039 | ++ses->ses_count; |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 2040 | spin_unlock(&cifs_tcp_ses_lock); |
Jeff Layton | 14fbf50 | 2008-11-14 13:53:46 -0500 | [diff] [blame] | 2041 | return ses; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2042 | } |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 2043 | spin_unlock(&cifs_tcp_ses_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2044 | return NULL; |
| 2045 | } |
| 2046 | |
Jeff Layton | 14fbf50 | 2008-11-14 13:53:46 -0500 | [diff] [blame] | 2047 | static void |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 2048 | cifs_put_smb_ses(struct cifs_ses *ses) |
Jeff Layton | 14fbf50 | 2008-11-14 13:53:46 -0500 | [diff] [blame] | 2049 | { |
| 2050 | int xid; |
| 2051 | struct TCP_Server_Info *server = ses->server; |
| 2052 | |
Jeff Layton | 36988c7 | 2010-04-24 07:57:43 -0400 | [diff] [blame] | 2053 | cFYI(1, "%s: ses_count=%d\n", __func__, ses->ses_count); |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 2054 | spin_lock(&cifs_tcp_ses_lock); |
Jeff Layton | 14fbf50 | 2008-11-14 13:53:46 -0500 | [diff] [blame] | 2055 | if (--ses->ses_count > 0) { |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 2056 | spin_unlock(&cifs_tcp_ses_lock); |
Jeff Layton | 14fbf50 | 2008-11-14 13:53:46 -0500 | [diff] [blame] | 2057 | return; |
| 2058 | } |
| 2059 | |
| 2060 | list_del_init(&ses->smb_ses_list); |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 2061 | spin_unlock(&cifs_tcp_ses_lock); |
Jeff Layton | 14fbf50 | 2008-11-14 13:53:46 -0500 | [diff] [blame] | 2062 | |
| 2063 | if (ses->status == CifsGood) { |
| 2064 | xid = GetXid(); |
| 2065 | CIFSSMBLogoff(xid, ses); |
| 2066 | _FreeXid(xid); |
| 2067 | } |
| 2068 | sesInfoFree(ses); |
| 2069 | cifs_put_tcp_session(server); |
| 2070 | } |
| 2071 | |
Jeff Layton | 8a8798a | 2012-01-17 16:09:15 -0500 | [diff] [blame] | 2072 | #ifdef CONFIG_KEYS |
| 2073 | |
| 2074 | /* strlen("cifs:a:") + INET6_ADDRSTRLEN + 1 */ |
| 2075 | #define CIFSCREDS_DESC_SIZE (7 + INET6_ADDRSTRLEN + 1) |
| 2076 | |
| 2077 | /* Populate username and pw fields from keyring if possible */ |
| 2078 | static int |
| 2079 | cifs_set_cifscreds(struct smb_vol *vol, struct cifs_ses *ses) |
| 2080 | { |
| 2081 | int rc = 0; |
| 2082 | char *desc, *delim, *payload; |
| 2083 | ssize_t len; |
| 2084 | struct key *key; |
| 2085 | struct TCP_Server_Info *server = ses->server; |
| 2086 | struct sockaddr_in *sa; |
| 2087 | struct sockaddr_in6 *sa6; |
| 2088 | struct user_key_payload *upayload; |
| 2089 | |
| 2090 | desc = kmalloc(CIFSCREDS_DESC_SIZE, GFP_KERNEL); |
| 2091 | if (!desc) |
| 2092 | return -ENOMEM; |
| 2093 | |
| 2094 | /* try to find an address key first */ |
| 2095 | switch (server->dstaddr.ss_family) { |
| 2096 | case AF_INET: |
| 2097 | sa = (struct sockaddr_in *)&server->dstaddr; |
| 2098 | sprintf(desc, "cifs:a:%pI4", &sa->sin_addr.s_addr); |
| 2099 | break; |
| 2100 | case AF_INET6: |
| 2101 | sa6 = (struct sockaddr_in6 *)&server->dstaddr; |
| 2102 | sprintf(desc, "cifs:a:%pI6c", &sa6->sin6_addr.s6_addr); |
| 2103 | break; |
| 2104 | default: |
| 2105 | cFYI(1, "Bad ss_family (%hu)", server->dstaddr.ss_family); |
| 2106 | rc = -EINVAL; |
| 2107 | goto out_err; |
| 2108 | } |
| 2109 | |
| 2110 | cFYI(1, "%s: desc=%s", __func__, desc); |
| 2111 | key = request_key(&key_type_logon, desc, ""); |
| 2112 | if (IS_ERR(key)) { |
| 2113 | if (!ses->domainName) { |
| 2114 | cFYI(1, "domainName is NULL"); |
| 2115 | rc = PTR_ERR(key); |
| 2116 | goto out_err; |
| 2117 | } |
| 2118 | |
| 2119 | /* didn't work, try to find a domain key */ |
| 2120 | sprintf(desc, "cifs:d:%s", ses->domainName); |
| 2121 | cFYI(1, "%s: desc=%s", __func__, desc); |
| 2122 | key = request_key(&key_type_logon, desc, ""); |
| 2123 | if (IS_ERR(key)) { |
| 2124 | rc = PTR_ERR(key); |
| 2125 | goto out_err; |
| 2126 | } |
| 2127 | } |
| 2128 | |
| 2129 | down_read(&key->sem); |
| 2130 | upayload = key->payload.data; |
| 2131 | if (IS_ERR_OR_NULL(upayload)) { |
Jeff Layton | 4edc53c | 2012-02-07 06:30:51 -0500 | [diff] [blame] | 2132 | rc = upayload ? PTR_ERR(upayload) : -EINVAL; |
Jeff Layton | 8a8798a | 2012-01-17 16:09:15 -0500 | [diff] [blame] | 2133 | goto out_key_put; |
| 2134 | } |
| 2135 | |
| 2136 | /* find first : in payload */ |
| 2137 | payload = (char *)upayload->data; |
| 2138 | delim = strnchr(payload, upayload->datalen, ':'); |
| 2139 | cFYI(1, "payload=%s", payload); |
| 2140 | if (!delim) { |
| 2141 | cFYI(1, "Unable to find ':' in payload (datalen=%d)", |
| 2142 | upayload->datalen); |
| 2143 | rc = -EINVAL; |
| 2144 | goto out_key_put; |
| 2145 | } |
| 2146 | |
| 2147 | len = delim - payload; |
| 2148 | if (len > MAX_USERNAME_SIZE || len <= 0) { |
Randy Dunlap | 000f9bb | 2012-01-30 19:50:01 -0800 | [diff] [blame] | 2149 | cFYI(1, "Bad value from username search (len=%zd)", len); |
Jeff Layton | 8a8798a | 2012-01-17 16:09:15 -0500 | [diff] [blame] | 2150 | rc = -EINVAL; |
| 2151 | goto out_key_put; |
| 2152 | } |
| 2153 | |
| 2154 | vol->username = kstrndup(payload, len, GFP_KERNEL); |
| 2155 | if (!vol->username) { |
Randy Dunlap | 000f9bb | 2012-01-30 19:50:01 -0800 | [diff] [blame] | 2156 | cFYI(1, "Unable to allocate %zd bytes for username", len); |
Jeff Layton | 8a8798a | 2012-01-17 16:09:15 -0500 | [diff] [blame] | 2157 | rc = -ENOMEM; |
| 2158 | goto out_key_put; |
| 2159 | } |
| 2160 | cFYI(1, "%s: username=%s", __func__, vol->username); |
| 2161 | |
| 2162 | len = key->datalen - (len + 1); |
| 2163 | if (len > MAX_PASSWORD_SIZE || len <= 0) { |
Randy Dunlap | 000f9bb | 2012-01-30 19:50:01 -0800 | [diff] [blame] | 2164 | cFYI(1, "Bad len for password search (len=%zd)", len); |
Jeff Layton | 8a8798a | 2012-01-17 16:09:15 -0500 | [diff] [blame] | 2165 | rc = -EINVAL; |
| 2166 | kfree(vol->username); |
| 2167 | vol->username = NULL; |
| 2168 | goto out_key_put; |
| 2169 | } |
| 2170 | |
| 2171 | ++delim; |
| 2172 | vol->password = kstrndup(delim, len, GFP_KERNEL); |
| 2173 | if (!vol->password) { |
Randy Dunlap | 000f9bb | 2012-01-30 19:50:01 -0800 | [diff] [blame] | 2174 | cFYI(1, "Unable to allocate %zd bytes for password", len); |
Jeff Layton | 8a8798a | 2012-01-17 16:09:15 -0500 | [diff] [blame] | 2175 | rc = -ENOMEM; |
| 2176 | kfree(vol->username); |
| 2177 | vol->username = NULL; |
| 2178 | goto out_key_put; |
| 2179 | } |
| 2180 | |
| 2181 | out_key_put: |
| 2182 | up_read(&key->sem); |
| 2183 | key_put(key); |
| 2184 | out_err: |
| 2185 | kfree(desc); |
| 2186 | cFYI(1, "%s: returning %d", __func__, rc); |
| 2187 | return rc; |
| 2188 | } |
| 2189 | #else /* ! CONFIG_KEYS */ |
| 2190 | static inline int |
| 2191 | cifs_set_cifscreds(struct smb_vol *vol __attribute__((unused)), |
| 2192 | struct cifs_ses *ses __attribute__((unused))) |
| 2193 | { |
| 2194 | return -ENOSYS; |
| 2195 | } |
| 2196 | #endif /* CONFIG_KEYS */ |
| 2197 | |
Steve French | d9b9420 | 2011-04-12 01:24:57 +0000 | [diff] [blame] | 2198 | static bool warned_on_ntlm; /* globals init to false automatically */ |
| 2199 | |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 2200 | static struct cifs_ses * |
Jeff Layton | 36988c7 | 2010-04-24 07:57:43 -0400 | [diff] [blame] | 2201 | cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info) |
| 2202 | { |
| 2203 | int rc = -ENOMEM, xid; |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 2204 | struct cifs_ses *ses; |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 2205 | struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr; |
| 2206 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr; |
Jeff Layton | 36988c7 | 2010-04-24 07:57:43 -0400 | [diff] [blame] | 2207 | |
| 2208 | xid = GetXid(); |
| 2209 | |
Jeff Layton | 4ff67b7 | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 2210 | ses = cifs_find_smb_ses(server, volume_info); |
Jeff Layton | 36988c7 | 2010-04-24 07:57:43 -0400 | [diff] [blame] | 2211 | if (ses) { |
| 2212 | cFYI(1, "Existing smb sess found (status=%d)", ses->status); |
| 2213 | |
Jeff Layton | 36988c7 | 2010-04-24 07:57:43 -0400 | [diff] [blame] | 2214 | mutex_lock(&ses->session_mutex); |
Jeff Layton | 198b568 | 2010-04-24 07:57:48 -0400 | [diff] [blame] | 2215 | rc = cifs_negotiate_protocol(xid, ses); |
| 2216 | if (rc) { |
| 2217 | mutex_unlock(&ses->session_mutex); |
| 2218 | /* problem -- put our ses reference */ |
| 2219 | cifs_put_smb_ses(ses); |
| 2220 | FreeXid(xid); |
| 2221 | return ERR_PTR(rc); |
| 2222 | } |
Jeff Layton | 36988c7 | 2010-04-24 07:57:43 -0400 | [diff] [blame] | 2223 | if (ses->need_reconnect) { |
| 2224 | cFYI(1, "Session needs reconnect"); |
| 2225 | rc = cifs_setup_session(xid, ses, |
| 2226 | volume_info->local_nls); |
| 2227 | if (rc) { |
| 2228 | mutex_unlock(&ses->session_mutex); |
| 2229 | /* problem -- put our reference */ |
| 2230 | cifs_put_smb_ses(ses); |
| 2231 | FreeXid(xid); |
| 2232 | return ERR_PTR(rc); |
| 2233 | } |
| 2234 | } |
| 2235 | mutex_unlock(&ses->session_mutex); |
Jeff Layton | 460cf34 | 2010-09-14 11:38:24 -0400 | [diff] [blame] | 2236 | |
| 2237 | /* existing SMB ses has a server reference already */ |
| 2238 | cifs_put_tcp_session(server); |
Jeff Layton | 36988c7 | 2010-04-24 07:57:43 -0400 | [diff] [blame] | 2239 | FreeXid(xid); |
| 2240 | return ses; |
| 2241 | } |
| 2242 | |
| 2243 | cFYI(1, "Existing smb sess not found"); |
| 2244 | ses = sesInfoAlloc(); |
| 2245 | if (ses == NULL) |
| 2246 | goto get_ses_fail; |
| 2247 | |
| 2248 | /* new SMB session uses our server ref */ |
| 2249 | ses->server = server; |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 2250 | if (server->dstaddr.ss_family == AF_INET6) |
| 2251 | sprintf(ses->serverName, "%pI6", &addr6->sin6_addr); |
Jeff Layton | 36988c7 | 2010-04-24 07:57:43 -0400 | [diff] [blame] | 2252 | else |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 2253 | sprintf(ses->serverName, "%pI4", &addr->sin_addr); |
Jeff Layton | 36988c7 | 2010-04-24 07:57:43 -0400 | [diff] [blame] | 2254 | |
Steve French | 8727c8a | 2011-02-25 01:11:56 -0600 | [diff] [blame] | 2255 | if (volume_info->username) { |
| 2256 | ses->user_name = kstrdup(volume_info->username, GFP_KERNEL); |
| 2257 | if (!ses->user_name) |
| 2258 | goto get_ses_fail; |
| 2259 | } |
Jeff Layton | 36988c7 | 2010-04-24 07:57:43 -0400 | [diff] [blame] | 2260 | |
| 2261 | /* volume_info->password freed at unmount */ |
| 2262 | if (volume_info->password) { |
| 2263 | ses->password = kstrdup(volume_info->password, GFP_KERNEL); |
| 2264 | if (!ses->password) |
| 2265 | goto get_ses_fail; |
| 2266 | } |
| 2267 | if (volume_info->domainname) { |
Shirish Pargaonkar | d3686d5 | 2010-10-28 09:53:07 -0500 | [diff] [blame] | 2268 | ses->domainName = kstrdup(volume_info->domainname, GFP_KERNEL); |
| 2269 | if (!ses->domainName) |
| 2270 | goto get_ses_fail; |
Jeff Layton | 36988c7 | 2010-04-24 07:57:43 -0400 | [diff] [blame] | 2271 | } |
Jeff Layton | 3e4b3e1 | 2010-07-19 18:00:17 -0400 | [diff] [blame] | 2272 | ses->cred_uid = volume_info->cred_uid; |
Jeff Layton | 36988c7 | 2010-04-24 07:57:43 -0400 | [diff] [blame] | 2273 | ses->linux_uid = volume_info->linux_uid; |
Steve French | d9b9420 | 2011-04-12 01:24:57 +0000 | [diff] [blame] | 2274 | |
| 2275 | /* ntlmv2 is much stronger than ntlm security, and has been broadly |
| 2276 | supported for many years, time to update default security mechanism */ |
| 2277 | if ((volume_info->secFlg == 0) && warned_on_ntlm == false) { |
| 2278 | warned_on_ntlm = true; |
| 2279 | cERROR(1, "default security mechanism requested. The default " |
| 2280 | "security mechanism will be upgraded from ntlm to " |
Steve French | 225de11 | 2012-01-03 23:08:24 -0600 | [diff] [blame] | 2281 | "ntlmv2 in kernel release 3.3"); |
Steve French | d9b9420 | 2011-04-12 01:24:57 +0000 | [diff] [blame] | 2282 | } |
Jeff Layton | 36988c7 | 2010-04-24 07:57:43 -0400 | [diff] [blame] | 2283 | ses->overrideSecFlg = volume_info->secFlg; |
| 2284 | |
| 2285 | mutex_lock(&ses->session_mutex); |
Jeff Layton | 198b568 | 2010-04-24 07:57:48 -0400 | [diff] [blame] | 2286 | rc = cifs_negotiate_protocol(xid, ses); |
| 2287 | if (!rc) |
| 2288 | rc = cifs_setup_session(xid, ses, volume_info->local_nls); |
Jeff Layton | 36988c7 | 2010-04-24 07:57:43 -0400 | [diff] [blame] | 2289 | mutex_unlock(&ses->session_mutex); |
Steve French | c8e56f1 | 2010-09-08 21:10:58 +0000 | [diff] [blame] | 2290 | if (rc) |
Jeff Layton | 36988c7 | 2010-04-24 07:57:43 -0400 | [diff] [blame] | 2291 | goto get_ses_fail; |
| 2292 | |
| 2293 | /* success, put it on the list */ |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 2294 | spin_lock(&cifs_tcp_ses_lock); |
Jeff Layton | 36988c7 | 2010-04-24 07:57:43 -0400 | [diff] [blame] | 2295 | list_add(&ses->smb_ses_list, &server->smb_ses_list); |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 2296 | spin_unlock(&cifs_tcp_ses_lock); |
Jeff Layton | 36988c7 | 2010-04-24 07:57:43 -0400 | [diff] [blame] | 2297 | |
| 2298 | FreeXid(xid); |
| 2299 | return ses; |
| 2300 | |
| 2301 | get_ses_fail: |
| 2302 | sesInfoFree(ses); |
| 2303 | FreeXid(xid); |
| 2304 | return ERR_PTR(rc); |
| 2305 | } |
| 2306 | |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 2307 | static int match_tcon(struct cifs_tcon *tcon, const char *unc) |
Pavel Shilovsky | 37bb04e | 2011-05-05 09:55:11 +0000 | [diff] [blame] | 2308 | { |
| 2309 | if (tcon->tidStatus == CifsExiting) |
| 2310 | return 0; |
| 2311 | if (strncmp(tcon->treeName, unc, MAX_TREE_SIZE)) |
| 2312 | return 0; |
| 2313 | return 1; |
| 2314 | } |
| 2315 | |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 2316 | static struct cifs_tcon * |
| 2317 | cifs_find_tcon(struct cifs_ses *ses, const char *unc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2318 | { |
| 2319 | struct list_head *tmp; |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 2320 | struct cifs_tcon *tcon; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2321 | |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 2322 | spin_lock(&cifs_tcp_ses_lock); |
Jeff Layton | f1987b4 | 2008-11-15 11:12:47 -0500 | [diff] [blame] | 2323 | list_for_each(tmp, &ses->tcon_list) { |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 2324 | tcon = list_entry(tmp, struct cifs_tcon, tcon_list); |
Pavel Shilovsky | 37bb04e | 2011-05-05 09:55:11 +0000 | [diff] [blame] | 2325 | if (!match_tcon(tcon, unc)) |
Jeff Layton | f1987b4 | 2008-11-15 11:12:47 -0500 | [diff] [blame] | 2326 | continue; |
Jeff Layton | f1987b4 | 2008-11-15 11:12:47 -0500 | [diff] [blame] | 2327 | ++tcon->tc_count; |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 2328 | spin_unlock(&cifs_tcp_ses_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2329 | return tcon; |
| 2330 | } |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 2331 | spin_unlock(&cifs_tcp_ses_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2332 | return NULL; |
| 2333 | } |
| 2334 | |
Jeff Layton | f1987b4 | 2008-11-15 11:12:47 -0500 | [diff] [blame] | 2335 | static void |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 2336 | cifs_put_tcon(struct cifs_tcon *tcon) |
Jeff Layton | f1987b4 | 2008-11-15 11:12:47 -0500 | [diff] [blame] | 2337 | { |
| 2338 | int xid; |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 2339 | struct cifs_ses *ses = tcon->ses; |
Jeff Layton | f1987b4 | 2008-11-15 11:12:47 -0500 | [diff] [blame] | 2340 | |
Jeff Layton | d00c28d | 2010-04-24 07:57:44 -0400 | [diff] [blame] | 2341 | cFYI(1, "%s: tc_count=%d\n", __func__, tcon->tc_count); |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 2342 | spin_lock(&cifs_tcp_ses_lock); |
Jeff Layton | f1987b4 | 2008-11-15 11:12:47 -0500 | [diff] [blame] | 2343 | if (--tcon->tc_count > 0) { |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 2344 | spin_unlock(&cifs_tcp_ses_lock); |
Jeff Layton | f1987b4 | 2008-11-15 11:12:47 -0500 | [diff] [blame] | 2345 | return; |
| 2346 | } |
| 2347 | |
| 2348 | list_del_init(&tcon->tcon_list); |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 2349 | spin_unlock(&cifs_tcp_ses_lock); |
Jeff Layton | f1987b4 | 2008-11-15 11:12:47 -0500 | [diff] [blame] | 2350 | |
| 2351 | xid = GetXid(); |
| 2352 | CIFSSMBTDis(xid, tcon); |
| 2353 | _FreeXid(xid); |
| 2354 | |
Suresh Jayaraman | d03382c | 2010-07-05 18:12:27 +0530 | [diff] [blame] | 2355 | cifs_fscache_release_super_cookie(tcon); |
Steve French | 9f84159 | 2010-07-23 20:37:53 +0000 | [diff] [blame] | 2356 | tconInfoFree(tcon); |
Jeff Layton | f1987b4 | 2008-11-15 11:12:47 -0500 | [diff] [blame] | 2357 | cifs_put_smb_ses(ses); |
| 2358 | } |
| 2359 | |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 2360 | static struct cifs_tcon * |
| 2361 | cifs_get_tcon(struct cifs_ses *ses, struct smb_vol *volume_info) |
Jeff Layton | d00c28d | 2010-04-24 07:57:44 -0400 | [diff] [blame] | 2362 | { |
| 2363 | int rc, xid; |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 2364 | struct cifs_tcon *tcon; |
Jeff Layton | d00c28d | 2010-04-24 07:57:44 -0400 | [diff] [blame] | 2365 | |
| 2366 | tcon = cifs_find_tcon(ses, volume_info->UNC); |
| 2367 | if (tcon) { |
| 2368 | cFYI(1, "Found match on UNC path"); |
| 2369 | /* existing tcon already has a reference */ |
| 2370 | cifs_put_smb_ses(ses); |
| 2371 | if (tcon->seal != volume_info->seal) |
| 2372 | cERROR(1, "transport encryption setting " |
| 2373 | "conflicts with existing tid"); |
| 2374 | return tcon; |
| 2375 | } |
| 2376 | |
| 2377 | tcon = tconInfoAlloc(); |
| 2378 | if (tcon == NULL) { |
| 2379 | rc = -ENOMEM; |
| 2380 | goto out_fail; |
| 2381 | } |
| 2382 | |
| 2383 | tcon->ses = ses; |
| 2384 | if (volume_info->password) { |
| 2385 | tcon->password = kstrdup(volume_info->password, GFP_KERNEL); |
| 2386 | if (!tcon->password) { |
| 2387 | rc = -ENOMEM; |
| 2388 | goto out_fail; |
| 2389 | } |
| 2390 | } |
| 2391 | |
| 2392 | if (strchr(volume_info->UNC + 3, '\\') == NULL |
| 2393 | && strchr(volume_info->UNC + 3, '/') == NULL) { |
| 2394 | cERROR(1, "Missing share name"); |
| 2395 | rc = -ENODEV; |
| 2396 | goto out_fail; |
| 2397 | } |
| 2398 | |
| 2399 | /* BB Do we need to wrap session_mutex around |
| 2400 | * this TCon call and Unix SetFS as |
| 2401 | * we do on SessSetup and reconnect? */ |
| 2402 | xid = GetXid(); |
| 2403 | rc = CIFSTCon(xid, ses, volume_info->UNC, tcon, volume_info->local_nls); |
| 2404 | FreeXid(xid); |
| 2405 | cFYI(1, "CIFS Tcon rc = %d", rc); |
| 2406 | if (rc) |
| 2407 | goto out_fail; |
| 2408 | |
| 2409 | if (volume_info->nodfs) { |
| 2410 | tcon->Flags &= ~SMB_SHARE_IS_IN_DFS; |
| 2411 | cFYI(1, "DFS disabled (%d)", tcon->Flags); |
| 2412 | } |
| 2413 | tcon->seal = volume_info->seal; |
| 2414 | /* we can have only one retry value for a connection |
| 2415 | to a share so for resources mounted more than once |
| 2416 | to the same server share the last value passed in |
| 2417 | for the retry flag is used */ |
| 2418 | tcon->retry = volume_info->retry; |
| 2419 | tcon->nocase = volume_info->nocase; |
| 2420 | tcon->local_lease = volume_info->local_lease; |
| 2421 | |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 2422 | spin_lock(&cifs_tcp_ses_lock); |
Jeff Layton | d00c28d | 2010-04-24 07:57:44 -0400 | [diff] [blame] | 2423 | list_add(&tcon->tcon_list, &ses->tcon_list); |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 2424 | spin_unlock(&cifs_tcp_ses_lock); |
Jeff Layton | d00c28d | 2010-04-24 07:57:44 -0400 | [diff] [blame] | 2425 | |
Suresh Jayaraman | d03382c | 2010-07-05 18:12:27 +0530 | [diff] [blame] | 2426 | cifs_fscache_get_super_cookie(tcon); |
| 2427 | |
Jeff Layton | d00c28d | 2010-04-24 07:57:44 -0400 | [diff] [blame] | 2428 | return tcon; |
| 2429 | |
| 2430 | out_fail: |
| 2431 | tconInfoFree(tcon); |
| 2432 | return ERR_PTR(rc); |
| 2433 | } |
| 2434 | |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 2435 | void |
| 2436 | cifs_put_tlink(struct tcon_link *tlink) |
| 2437 | { |
| 2438 | if (!tlink || IS_ERR(tlink)) |
| 2439 | return; |
| 2440 | |
| 2441 | if (!atomic_dec_and_test(&tlink->tl_count) || |
| 2442 | test_bit(TCON_LINK_IN_TREE, &tlink->tl_flags)) { |
| 2443 | tlink->tl_time = jiffies; |
| 2444 | return; |
| 2445 | } |
| 2446 | |
| 2447 | if (!IS_ERR(tlink_tcon(tlink))) |
| 2448 | cifs_put_tcon(tlink_tcon(tlink)); |
| 2449 | kfree(tlink); |
| 2450 | return; |
| 2451 | } |
Jeff Layton | d00c28d | 2010-04-24 07:57:44 -0400 | [diff] [blame] | 2452 | |
Pavel Shilovsky | 25c7f41 | 2011-05-26 23:35:47 +0400 | [diff] [blame] | 2453 | static inline struct tcon_link * |
Pavel Shilovsky | cd51875 | 2011-06-09 12:58:53 +0400 | [diff] [blame] | 2454 | cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb) |
| 2455 | { |
| 2456 | return cifs_sb->master_tlink; |
| 2457 | } |
Pavel Shilovsky | 25c7f41 | 2011-05-26 23:35:47 +0400 | [diff] [blame] | 2458 | |
| 2459 | static int |
| 2460 | compare_mount_options(struct super_block *sb, struct cifs_mnt_data *mnt_data) |
| 2461 | { |
| 2462 | struct cifs_sb_info *old = CIFS_SB(sb); |
| 2463 | struct cifs_sb_info *new = mnt_data->cifs_sb; |
| 2464 | |
| 2465 | if ((sb->s_flags & CIFS_MS_MASK) != (mnt_data->flags & CIFS_MS_MASK)) |
| 2466 | return 0; |
| 2467 | |
| 2468 | if ((old->mnt_cifs_flags & CIFS_MOUNT_MASK) != |
| 2469 | (new->mnt_cifs_flags & CIFS_MOUNT_MASK)) |
| 2470 | return 0; |
| 2471 | |
Pavel Shilovsky | 25c7f41 | 2011-05-26 23:35:47 +0400 | [diff] [blame] | 2472 | /* |
Jeff Layton | 5eba8ab | 2011-10-19 15:30:26 -0400 | [diff] [blame] | 2473 | * We want to share sb only if we don't specify an r/wsize or |
| 2474 | * specified r/wsize is greater than or equal to existing one. |
Pavel Shilovsky | 25c7f41 | 2011-05-26 23:35:47 +0400 | [diff] [blame] | 2475 | */ |
| 2476 | if (new->wsize && new->wsize < old->wsize) |
| 2477 | return 0; |
| 2478 | |
Jeff Layton | 5eba8ab | 2011-10-19 15:30:26 -0400 | [diff] [blame] | 2479 | if (new->rsize && new->rsize < old->rsize) |
| 2480 | return 0; |
| 2481 | |
Pavel Shilovsky | 25c7f41 | 2011-05-26 23:35:47 +0400 | [diff] [blame] | 2482 | if (old->mnt_uid != new->mnt_uid || old->mnt_gid != new->mnt_gid) |
| 2483 | return 0; |
| 2484 | |
| 2485 | if (old->mnt_file_mode != new->mnt_file_mode || |
| 2486 | old->mnt_dir_mode != new->mnt_dir_mode) |
| 2487 | return 0; |
| 2488 | |
| 2489 | if (strcmp(old->local_nls->charset, new->local_nls->charset)) |
| 2490 | return 0; |
| 2491 | |
| 2492 | if (old->actimeo != new->actimeo) |
| 2493 | return 0; |
| 2494 | |
| 2495 | return 1; |
| 2496 | } |
| 2497 | |
| 2498 | int |
| 2499 | cifs_match_super(struct super_block *sb, void *data) |
| 2500 | { |
| 2501 | struct cifs_mnt_data *mnt_data = (struct cifs_mnt_data *)data; |
| 2502 | struct smb_vol *volume_info; |
| 2503 | struct cifs_sb_info *cifs_sb; |
| 2504 | struct TCP_Server_Info *tcp_srv; |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 2505 | struct cifs_ses *ses; |
| 2506 | struct cifs_tcon *tcon; |
Pavel Shilovsky | 25c7f41 | 2011-05-26 23:35:47 +0400 | [diff] [blame] | 2507 | struct tcon_link *tlink; |
| 2508 | struct sockaddr_storage addr; |
| 2509 | int rc = 0; |
| 2510 | |
| 2511 | memset(&addr, 0, sizeof(struct sockaddr_storage)); |
| 2512 | |
| 2513 | spin_lock(&cifs_tcp_ses_lock); |
| 2514 | cifs_sb = CIFS_SB(sb); |
| 2515 | tlink = cifs_get_tlink(cifs_sb_master_tlink(cifs_sb)); |
| 2516 | if (IS_ERR(tlink)) { |
| 2517 | spin_unlock(&cifs_tcp_ses_lock); |
| 2518 | return rc; |
| 2519 | } |
| 2520 | tcon = tlink_tcon(tlink); |
| 2521 | ses = tcon->ses; |
| 2522 | tcp_srv = ses->server; |
| 2523 | |
| 2524 | volume_info = mnt_data->vol; |
| 2525 | |
| 2526 | if (!volume_info->UNCip || !volume_info->UNC) |
| 2527 | goto out; |
| 2528 | |
| 2529 | rc = cifs_fill_sockaddr((struct sockaddr *)&addr, |
| 2530 | volume_info->UNCip, |
| 2531 | strlen(volume_info->UNCip), |
| 2532 | volume_info->port); |
| 2533 | if (!rc) |
| 2534 | goto out; |
| 2535 | |
| 2536 | if (!match_server(tcp_srv, (struct sockaddr *)&addr, volume_info) || |
| 2537 | !match_session(ses, volume_info) || |
| 2538 | !match_tcon(tcon, volume_info->UNC)) { |
| 2539 | rc = 0; |
| 2540 | goto out; |
| 2541 | } |
| 2542 | |
| 2543 | rc = compare_mount_options(sb, mnt_data); |
| 2544 | out: |
Pavel Shilovsky | 25c7f41 | 2011-05-26 23:35:47 +0400 | [diff] [blame] | 2545 | spin_unlock(&cifs_tcp_ses_lock); |
Jeff Layton | f484b5d0 | 2011-07-11 10:16:34 -0400 | [diff] [blame] | 2546 | cifs_put_tlink(tlink); |
Pavel Shilovsky | 25c7f41 | 2011-05-26 23:35:47 +0400 | [diff] [blame] | 2547 | return rc; |
| 2548 | } |
| 2549 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2550 | int |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 2551 | get_dfs_path(int xid, struct cifs_ses *pSesInfo, const char *old_path, |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 2552 | const struct nls_table *nls_codepage, unsigned int *pnum_referrals, |
Steve French | 366781c | 2008-01-25 10:12:41 +0000 | [diff] [blame] | 2553 | struct dfs_info3_param **preferrals, int remap) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2554 | { |
| 2555 | char *temp_unc; |
| 2556 | int rc = 0; |
| 2557 | |
| 2558 | *pnum_referrals = 0; |
Steve French | 366781c | 2008-01-25 10:12:41 +0000 | [diff] [blame] | 2559 | *preferrals = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2560 | |
| 2561 | if (pSesInfo->ipc_tid == 0) { |
| 2562 | temp_unc = kmalloc(2 /* for slashes */ + |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 2563 | strnlen(pSesInfo->serverName, |
| 2564 | SERVER_NAME_LEN_WITH_NULL * 2) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2565 | + 1 + 4 /* slash IPC$ */ + 2, |
| 2566 | GFP_KERNEL); |
| 2567 | if (temp_unc == NULL) |
| 2568 | return -ENOMEM; |
| 2569 | temp_unc[0] = '\\'; |
| 2570 | temp_unc[1] = '\\'; |
| 2571 | strcpy(temp_unc + 2, pSesInfo->serverName); |
| 2572 | strcpy(temp_unc + 2 + strlen(pSesInfo->serverName), "\\IPC$"); |
| 2573 | rc = CIFSTCon(xid, pSesInfo, temp_unc, NULL, nls_codepage); |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 2574 | cFYI(1, "CIFS Tcon rc = %d ipc_tid = %d", rc, pSesInfo->ipc_tid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2575 | kfree(temp_unc); |
| 2576 | } |
| 2577 | if (rc == 0) |
Steve French | c2cf07d | 2008-05-15 06:20:02 +0000 | [diff] [blame] | 2578 | rc = CIFSGetDFSRefer(xid, pSesInfo, old_path, preferrals, |
Steve French | 737b758 | 2005-04-28 22:41:06 -0700 | [diff] [blame] | 2579 | pnum_referrals, nls_codepage, remap); |
Steve French | 366781c | 2008-01-25 10:12:41 +0000 | [diff] [blame] | 2580 | /* BB map targetUNCs to dfs_info3 structures, here or |
| 2581 | in CIFSGetDFSRefer BB */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2582 | |
| 2583 | return rc; |
| 2584 | } |
| 2585 | |
Jeff Layton | 09e50d5 | 2008-07-23 10:11:19 -0400 | [diff] [blame] | 2586 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
| 2587 | static struct lock_class_key cifs_key[2]; |
| 2588 | static struct lock_class_key cifs_slock_key[2]; |
| 2589 | |
| 2590 | static inline void |
| 2591 | cifs_reclassify_socket4(struct socket *sock) |
| 2592 | { |
| 2593 | struct sock *sk = sock->sk; |
| 2594 | BUG_ON(sock_owned_by_user(sk)); |
| 2595 | sock_lock_init_class_and_name(sk, "slock-AF_INET-CIFS", |
| 2596 | &cifs_slock_key[0], "sk_lock-AF_INET-CIFS", &cifs_key[0]); |
| 2597 | } |
| 2598 | |
| 2599 | static inline void |
| 2600 | cifs_reclassify_socket6(struct socket *sock) |
| 2601 | { |
| 2602 | struct sock *sk = sock->sk; |
| 2603 | BUG_ON(sock_owned_by_user(sk)); |
| 2604 | sock_lock_init_class_and_name(sk, "slock-AF_INET6-CIFS", |
| 2605 | &cifs_slock_key[1], "sk_lock-AF_INET6-CIFS", &cifs_key[1]); |
| 2606 | } |
| 2607 | #else |
| 2608 | static inline void |
| 2609 | cifs_reclassify_socket4(struct socket *sock) |
| 2610 | { |
| 2611 | } |
| 2612 | |
| 2613 | static inline void |
| 2614 | cifs_reclassify_socket6(struct socket *sock) |
| 2615 | { |
| 2616 | } |
| 2617 | #endif |
| 2618 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2619 | /* See RFC1001 section 14 on representation of Netbios names */ |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 2620 | static void rfc1002mangle(char *target, char *source, unsigned int length) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2621 | { |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 2622 | unsigned int i, j; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2623 | |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 2624 | for (i = 0, j = 0; i < (length); i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2625 | /* mask a nibble at a time and encode */ |
| 2626 | target[j] = 'A' + (0x0F & (source[i] >> 4)); |
| 2627 | target[j+1] = 'A' + (0x0F & source[i]); |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 2628 | j += 2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2629 | } |
| 2630 | |
| 2631 | } |
| 2632 | |
Ben Greear | 3eb9a88 | 2010-09-01 17:06:02 -0700 | [diff] [blame] | 2633 | static int |
| 2634 | bind_socket(struct TCP_Server_Info *server) |
| 2635 | { |
| 2636 | int rc = 0; |
| 2637 | if (server->srcaddr.ss_family != AF_UNSPEC) { |
| 2638 | /* Bind to the specified local IP address */ |
| 2639 | struct socket *socket = server->ssocket; |
| 2640 | rc = socket->ops->bind(socket, |
| 2641 | (struct sockaddr *) &server->srcaddr, |
| 2642 | sizeof(server->srcaddr)); |
| 2643 | if (rc < 0) { |
| 2644 | struct sockaddr_in *saddr4; |
| 2645 | struct sockaddr_in6 *saddr6; |
| 2646 | saddr4 = (struct sockaddr_in *)&server->srcaddr; |
| 2647 | saddr6 = (struct sockaddr_in6 *)&server->srcaddr; |
| 2648 | if (saddr6->sin6_family == AF_INET6) |
| 2649 | cERROR(1, "cifs: " |
| 2650 | "Failed to bind to: %pI6c, error: %d\n", |
| 2651 | &saddr6->sin6_addr, rc); |
| 2652 | else |
| 2653 | cERROR(1, "cifs: " |
| 2654 | "Failed to bind to: %pI4, error: %d\n", |
| 2655 | &saddr4->sin_addr.s_addr, rc); |
| 2656 | } |
| 2657 | } |
| 2658 | return rc; |
| 2659 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2660 | |
| 2661 | static int |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 2662 | ip_rfc1001_connect(struct TCP_Server_Info *server) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2663 | { |
| 2664 | int rc = 0; |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 2665 | /* |
| 2666 | * some servers require RFC1001 sessinit before sending |
| 2667 | * negprot - BB check reconnection in case where second |
| 2668 | * sessinit is sent but no second negprot |
| 2669 | */ |
| 2670 | struct rfc1002_session_packet *ses_init_buf; |
| 2671 | struct smb_hdr *smb_buf; |
| 2672 | ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet), |
| 2673 | GFP_KERNEL); |
| 2674 | if (ses_init_buf) { |
| 2675 | ses_init_buf->trailer.session_req.called_len = 32; |
| 2676 | |
| 2677 | if (server->server_RFC1001_name && |
| 2678 | server->server_RFC1001_name[0] != 0) |
| 2679 | rfc1002mangle(ses_init_buf->trailer. |
| 2680 | session_req.called_name, |
| 2681 | server->server_RFC1001_name, |
| 2682 | RFC1001_NAME_LEN_WITH_NULL); |
| 2683 | else |
| 2684 | rfc1002mangle(ses_init_buf->trailer. |
| 2685 | session_req.called_name, |
| 2686 | DEFAULT_CIFS_CALLED_NAME, |
| 2687 | RFC1001_NAME_LEN_WITH_NULL); |
| 2688 | |
| 2689 | ses_init_buf->trailer.session_req.calling_len = 32; |
| 2690 | |
| 2691 | /* |
| 2692 | * calling name ends in null (byte 16) from old smb |
| 2693 | * convention. |
| 2694 | */ |
| 2695 | if (server->workstation_RFC1001_name && |
| 2696 | server->workstation_RFC1001_name[0] != 0) |
| 2697 | rfc1002mangle(ses_init_buf->trailer. |
| 2698 | session_req.calling_name, |
| 2699 | server->workstation_RFC1001_name, |
| 2700 | RFC1001_NAME_LEN_WITH_NULL); |
| 2701 | else |
| 2702 | rfc1002mangle(ses_init_buf->trailer. |
| 2703 | session_req.calling_name, |
| 2704 | "LINUX_CIFS_CLNT", |
| 2705 | RFC1001_NAME_LEN_WITH_NULL); |
| 2706 | |
| 2707 | ses_init_buf->trailer.session_req.scope1 = 0; |
| 2708 | ses_init_buf->trailer.session_req.scope2 = 0; |
| 2709 | smb_buf = (struct smb_hdr *)ses_init_buf; |
| 2710 | |
| 2711 | /* sizeof RFC1002_SESSION_REQUEST with no scope */ |
Steve French | be8e3b0 | 2011-04-29 05:40:20 +0000 | [diff] [blame] | 2712 | smb_buf->smb_buf_length = cpu_to_be32(0x81000044); |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 2713 | rc = smb_send(server, smb_buf, 0x44); |
| 2714 | kfree(ses_init_buf); |
| 2715 | /* |
| 2716 | * RFC1001 layer in at least one server |
| 2717 | * requires very short break before negprot |
| 2718 | * presumably because not expecting negprot |
| 2719 | * to follow so fast. This is a simple |
| 2720 | * solution that works without |
| 2721 | * complicating the code and causes no |
| 2722 | * significant slowing down on mount |
| 2723 | * for everyone else |
| 2724 | */ |
| 2725 | usleep_range(1000, 2000); |
| 2726 | } |
| 2727 | /* |
| 2728 | * else the negprot may still work without this |
| 2729 | * even though malloc failed |
| 2730 | */ |
| 2731 | |
| 2732 | return rc; |
| 2733 | } |
| 2734 | |
| 2735 | static int |
| 2736 | generic_ip_connect(struct TCP_Server_Info *server) |
| 2737 | { |
| 2738 | int rc = 0; |
Steve French | 6da9791 | 2011-03-13 18:55:55 +0000 | [diff] [blame] | 2739 | __be16 sport; |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 2740 | int slen, sfamily; |
Jeff Layton | bcf4b10 | 2008-12-01 18:42:15 -0500 | [diff] [blame] | 2741 | struct socket *socket = server->ssocket; |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 2742 | struct sockaddr *saddr; |
| 2743 | |
| 2744 | saddr = (struct sockaddr *) &server->dstaddr; |
| 2745 | |
| 2746 | if (server->dstaddr.ss_family == AF_INET6) { |
| 2747 | sport = ((struct sockaddr_in6 *) saddr)->sin6_port; |
| 2748 | slen = sizeof(struct sockaddr_in6); |
| 2749 | sfamily = AF_INET6; |
| 2750 | } else { |
| 2751 | sport = ((struct sockaddr_in *) saddr)->sin_port; |
| 2752 | slen = sizeof(struct sockaddr_in); |
| 2753 | sfamily = AF_INET; |
| 2754 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2755 | |
Jeff Layton | bcf4b10 | 2008-12-01 18:42:15 -0500 | [diff] [blame] | 2756 | if (socket == NULL) { |
Rob Landley | f1d0c99 | 2011-01-22 15:44:05 -0600 | [diff] [blame] | 2757 | rc = __sock_create(cifs_net_ns(server), sfamily, SOCK_STREAM, |
| 2758 | IPPROTO_TCP, &socket, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2759 | if (rc < 0) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 2760 | cERROR(1, "Error %d creating socket", rc); |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 2761 | server->ssocket = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2762 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2763 | } |
Jeff Layton | bcf4b10 | 2008-12-01 18:42:15 -0500 | [diff] [blame] | 2764 | |
| 2765 | /* BB other socket options to set KEEPALIVE, NODELAY? */ |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 2766 | cFYI(1, "Socket created"); |
Jeff Layton | bcf4b10 | 2008-12-01 18:42:15 -0500 | [diff] [blame] | 2767 | server->ssocket = socket; |
| 2768 | socket->sk->sk_allocation = GFP_NOFS; |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 2769 | if (sfamily == AF_INET6) |
| 2770 | cifs_reclassify_socket6(socket); |
| 2771 | else |
| 2772 | cifs_reclassify_socket4(socket); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2773 | } |
| 2774 | |
Ben Greear | 3eb9a88 | 2010-09-01 17:06:02 -0700 | [diff] [blame] | 2775 | rc = bind_socket(server); |
| 2776 | if (rc < 0) |
| 2777 | return rc; |
| 2778 | |
Jeff Layton | d5c5605 | 2008-12-01 18:42:33 -0500 | [diff] [blame] | 2779 | /* |
| 2780 | * Eventually check for other socket options to change from |
| 2781 | * the default. sock_setsockopt not used because it expects |
| 2782 | * user space buffer |
| 2783 | */ |
| 2784 | socket->sk->sk_rcvtimeo = 7 * HZ; |
Steve French | da505c3 | 2009-01-19 03:49:35 +0000 | [diff] [blame] | 2785 | socket->sk->sk_sndtimeo = 5 * HZ; |
Steve French | 6a5fa236 | 2010-01-01 01:28:43 +0000 | [diff] [blame] | 2786 | |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 2787 | /* make the bufsizes depend on wsize/rsize and max requests */ |
| 2788 | if (server->noautotune) { |
| 2789 | if (socket->sk->sk_sndbuf < (200 * 1024)) |
| 2790 | socket->sk->sk_sndbuf = 200 * 1024; |
| 2791 | if (socket->sk->sk_rcvbuf < (140 * 1024)) |
| 2792 | socket->sk->sk_rcvbuf = 140 * 1024; |
| 2793 | } |
| 2794 | |
Steve French | 6a5fa236 | 2010-01-01 01:28:43 +0000 | [diff] [blame] | 2795 | if (server->tcp_nodelay) { |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 2796 | int val = 1; |
Steve French | 6a5fa236 | 2010-01-01 01:28:43 +0000 | [diff] [blame] | 2797 | rc = kernel_setsockopt(socket, SOL_TCP, TCP_NODELAY, |
| 2798 | (char *)&val, sizeof(val)); |
| 2799 | if (rc) |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 2800 | cFYI(1, "set TCP_NODELAY socket option error %d", rc); |
Steve French | 6a5fa236 | 2010-01-01 01:28:43 +0000 | [diff] [blame] | 2801 | } |
| 2802 | |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 2803 | cFYI(1, "sndbuf %d rcvbuf %d rcvtimeo 0x%lx", |
| 2804 | socket->sk->sk_sndbuf, |
| 2805 | socket->sk->sk_rcvbuf, socket->sk->sk_rcvtimeo); |
| 2806 | |
Jeff Layton | ee1b3ea | 2011-06-21 07:18:26 -0400 | [diff] [blame] | 2807 | rc = socket->ops->connect(socket, saddr, slen, 0); |
| 2808 | if (rc < 0) { |
| 2809 | cFYI(1, "Error %d connecting to server", rc); |
| 2810 | sock_release(socket); |
| 2811 | server->ssocket = NULL; |
| 2812 | return rc; |
| 2813 | } |
| 2814 | |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 2815 | if (sport == htons(RFC1001_PORT)) |
| 2816 | rc = ip_rfc1001_connect(server); |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 2817 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2818 | return rc; |
| 2819 | } |
| 2820 | |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 2821 | static int |
| 2822 | ip_connect(struct TCP_Server_Info *server) |
| 2823 | { |
Steve French | 6da9791 | 2011-03-13 18:55:55 +0000 | [diff] [blame] | 2824 | __be16 *sport; |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 2825 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr; |
| 2826 | struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr; |
| 2827 | |
| 2828 | if (server->dstaddr.ss_family == AF_INET6) |
| 2829 | sport = &addr6->sin6_port; |
| 2830 | else |
| 2831 | sport = &addr->sin_port; |
| 2832 | |
| 2833 | if (*sport == 0) { |
| 2834 | int rc; |
| 2835 | |
| 2836 | /* try with 445 port at first */ |
| 2837 | *sport = htons(CIFS_PORT); |
| 2838 | |
| 2839 | rc = generic_ip_connect(server); |
| 2840 | if (rc >= 0) |
| 2841 | return rc; |
| 2842 | |
| 2843 | /* if it failed, try with 139 port */ |
| 2844 | *sport = htons(RFC1001_PORT); |
| 2845 | } |
| 2846 | |
| 2847 | return generic_ip_connect(server); |
| 2848 | } |
| 2849 | |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 2850 | void reset_cifs_unix_caps(int xid, struct cifs_tcon *tcon, |
Al Viro | 2c6292a | 2011-06-17 09:05:48 -0400 | [diff] [blame] | 2851 | struct cifs_sb_info *cifs_sb, struct smb_vol *vol_info) |
Steve French | 8af1897 | 2007-02-14 04:42:51 +0000 | [diff] [blame] | 2852 | { |
| 2853 | /* if we are reconnecting then should we check to see if |
| 2854 | * any requested capabilities changed locally e.g. via |
| 2855 | * remount but we can not do much about it here |
| 2856 | * if they have (even if we could detect it by the following) |
| 2857 | * Perhaps we could add a backpointer to array of sb from tcon |
| 2858 | * or if we change to make all sb to same share the same |
| 2859 | * sb as NFS - then we only have one backpointer to sb. |
| 2860 | * What if we wanted to mount the server share twice once with |
| 2861 | * and once without posixacls or posix paths? */ |
| 2862 | __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability); |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 2863 | |
Steve French | c18c842 | 2007-07-18 23:21:09 +0000 | [diff] [blame] | 2864 | if (vol_info && vol_info->no_linux_ext) { |
| 2865 | tcon->fsUnixInfo.Capability = 0; |
| 2866 | tcon->unix_ext = 0; /* Unix Extensions disabled */ |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 2867 | cFYI(1, "Linux protocol extensions disabled"); |
Steve French | c18c842 | 2007-07-18 23:21:09 +0000 | [diff] [blame] | 2868 | return; |
| 2869 | } else if (vol_info) |
| 2870 | tcon->unix_ext = 1; /* Unix Extensions supported */ |
| 2871 | |
| 2872 | if (tcon->unix_ext == 0) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 2873 | cFYI(1, "Unix extensions disabled so not set on reconnect"); |
Steve French | c18c842 | 2007-07-18 23:21:09 +0000 | [diff] [blame] | 2874 | return; |
| 2875 | } |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 2876 | |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 2877 | if (!CIFSSMBQFSUnixInfo(xid, tcon)) { |
Steve French | 8af1897 | 2007-02-14 04:42:51 +0000 | [diff] [blame] | 2878 | __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability); |
Steve French | 6848b73 | 2011-05-26 18:38:54 +0000 | [diff] [blame] | 2879 | cFYI(1, "unix caps which server supports %lld", cap); |
Steve French | 8af1897 | 2007-02-14 04:42:51 +0000 | [diff] [blame] | 2880 | /* check for reconnect case in which we do not |
| 2881 | want to change the mount behavior if we can avoid it */ |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 2882 | if (vol_info == NULL) { |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 2883 | /* turn off POSIX ACL and PATHNAMES if not set |
Steve French | 8af1897 | 2007-02-14 04:42:51 +0000 | [diff] [blame] | 2884 | originally at mount time */ |
| 2885 | if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0) |
| 2886 | cap &= ~CIFS_UNIX_POSIX_ACL_CAP; |
Igor Mammedov | 11b6d64 | 2008-02-15 19:06:04 +0000 | [diff] [blame] | 2887 | if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) { |
| 2888 | if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 2889 | cERROR(1, "POSIXPATH support change"); |
Steve French | 8af1897 | 2007-02-14 04:42:51 +0000 | [diff] [blame] | 2890 | cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP; |
Igor Mammedov | 11b6d64 | 2008-02-15 19:06:04 +0000 | [diff] [blame] | 2891 | } else if ((cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 2892 | cERROR(1, "possible reconnect error"); |
| 2893 | cERROR(1, "server disabled POSIX path support"); |
Igor Mammedov | 11b6d64 | 2008-02-15 19:06:04 +0000 | [diff] [blame] | 2894 | } |
Steve French | 8af1897 | 2007-02-14 04:42:51 +0000 | [diff] [blame] | 2895 | } |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 2896 | |
Steve French | 6848b73 | 2011-05-26 18:38:54 +0000 | [diff] [blame] | 2897 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP) |
| 2898 | cERROR(1, "per-share encryption not supported yet"); |
| 2899 | |
Steve French | 8af1897 | 2007-02-14 04:42:51 +0000 | [diff] [blame] | 2900 | cap &= CIFS_UNIX_CAP_MASK; |
Steve French | 75865f8c | 2007-06-24 18:30:48 +0000 | [diff] [blame] | 2901 | if (vol_info && vol_info->no_psx_acl) |
Steve French | 8af1897 | 2007-02-14 04:42:51 +0000 | [diff] [blame] | 2902 | cap &= ~CIFS_UNIX_POSIX_ACL_CAP; |
Steve French | 75865f8c | 2007-06-24 18:30:48 +0000 | [diff] [blame] | 2903 | else if (CIFS_UNIX_POSIX_ACL_CAP & cap) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 2904 | cFYI(1, "negotiated posix acl support"); |
Al Viro | 2c6292a | 2011-06-17 09:05:48 -0400 | [diff] [blame] | 2905 | if (cifs_sb) |
| 2906 | cifs_sb->mnt_cifs_flags |= |
| 2907 | CIFS_MOUNT_POSIXACL; |
Steve French | 8af1897 | 2007-02-14 04:42:51 +0000 | [diff] [blame] | 2908 | } |
| 2909 | |
Steve French | 75865f8c | 2007-06-24 18:30:48 +0000 | [diff] [blame] | 2910 | if (vol_info && vol_info->posix_paths == 0) |
Steve French | 8af1897 | 2007-02-14 04:42:51 +0000 | [diff] [blame] | 2911 | cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP; |
Steve French | 75865f8c | 2007-06-24 18:30:48 +0000 | [diff] [blame] | 2912 | else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 2913 | cFYI(1, "negotiate posix pathnames"); |
Al Viro | 2c6292a | 2011-06-17 09:05:48 -0400 | [diff] [blame] | 2914 | if (cifs_sb) |
| 2915 | cifs_sb->mnt_cifs_flags |= |
Steve French | 8af1897 | 2007-02-14 04:42:51 +0000 | [diff] [blame] | 2916 | CIFS_MOUNT_POSIX_PATHS; |
| 2917 | } |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 2918 | |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 2919 | cFYI(1, "Negotiate caps 0x%x", (int)cap); |
Steve French | 8af1897 | 2007-02-14 04:42:51 +0000 | [diff] [blame] | 2920 | #ifdef CONFIG_CIFS_DEBUG2 |
Steve French | 75865f8c | 2007-06-24 18:30:48 +0000 | [diff] [blame] | 2921 | if (cap & CIFS_UNIX_FCNTL_CAP) |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 2922 | cFYI(1, "FCNTL cap"); |
Steve French | 75865f8c | 2007-06-24 18:30:48 +0000 | [diff] [blame] | 2923 | if (cap & CIFS_UNIX_EXTATTR_CAP) |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 2924 | cFYI(1, "EXTATTR cap"); |
Steve French | 75865f8c | 2007-06-24 18:30:48 +0000 | [diff] [blame] | 2925 | if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 2926 | cFYI(1, "POSIX path cap"); |
Steve French | 75865f8c | 2007-06-24 18:30:48 +0000 | [diff] [blame] | 2927 | if (cap & CIFS_UNIX_XATTR_CAP) |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 2928 | cFYI(1, "XATTR cap"); |
Steve French | 75865f8c | 2007-06-24 18:30:48 +0000 | [diff] [blame] | 2929 | if (cap & CIFS_UNIX_POSIX_ACL_CAP) |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 2930 | cFYI(1, "POSIX ACL cap"); |
Steve French | 75865f8c | 2007-06-24 18:30:48 +0000 | [diff] [blame] | 2931 | if (cap & CIFS_UNIX_LARGE_READ_CAP) |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 2932 | cFYI(1, "very large read cap"); |
Steve French | 75865f8c | 2007-06-24 18:30:48 +0000 | [diff] [blame] | 2933 | if (cap & CIFS_UNIX_LARGE_WRITE_CAP) |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 2934 | cFYI(1, "very large write cap"); |
Steve French | 6848b73 | 2011-05-26 18:38:54 +0000 | [diff] [blame] | 2935 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_CAP) |
| 2936 | cFYI(1, "transport encryption cap"); |
| 2937 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP) |
| 2938 | cFYI(1, "mandatory transport encryption cap"); |
Steve French | 8af1897 | 2007-02-14 04:42:51 +0000 | [diff] [blame] | 2939 | #endif /* CIFS_DEBUG2 */ |
| 2940 | if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) { |
Steve French | 442aa31 | 2007-09-24 20:25:46 +0000 | [diff] [blame] | 2941 | if (vol_info == NULL) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 2942 | cFYI(1, "resetting capabilities failed"); |
Steve French | 442aa31 | 2007-09-24 20:25:46 +0000 | [diff] [blame] | 2943 | } else |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 2944 | cERROR(1, "Negotiating Unix capabilities " |
Steve French | 5a44b31 | 2007-09-20 15:16:24 +0000 | [diff] [blame] | 2945 | "with the server failed. Consider " |
| 2946 | "mounting with the Unix Extensions\n" |
| 2947 | "disabled, if problems are found, " |
| 2948 | "by specifying the nounix mount " |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 2949 | "option."); |
Steve French | 5a44b31 | 2007-09-20 15:16:24 +0000 | [diff] [blame] | 2950 | |
Steve French | 8af1897 | 2007-02-14 04:42:51 +0000 | [diff] [blame] | 2951 | } |
| 2952 | } |
| 2953 | } |
| 2954 | |
Pavel Shilovsky | 724d9f1 | 2011-05-05 09:55:12 +0000 | [diff] [blame] | 2955 | void cifs_setup_cifs_sb(struct smb_vol *pvolume_info, |
| 2956 | struct cifs_sb_info *cifs_sb) |
Jeff Layton | b1c8d2b | 2008-10-22 13:57:07 -0400 | [diff] [blame] | 2957 | { |
Jeff Layton | 2de970f | 2010-10-06 19:51:12 -0400 | [diff] [blame] | 2958 | INIT_DELAYED_WORK(&cifs_sb->prune_tlinks, cifs_prune_tlinks); |
| 2959 | |
Al Viro | 2ced6f6 | 2011-06-17 09:20:04 -0400 | [diff] [blame] | 2960 | spin_lock_init(&cifs_sb->tlink_tree_lock); |
| 2961 | cifs_sb->tlink_tree = RB_ROOT; |
| 2962 | |
Pavel Shilovsky | 25c7f41 | 2011-05-26 23:35:47 +0400 | [diff] [blame] | 2963 | /* |
Jeff Layton | 5eba8ab | 2011-10-19 15:30:26 -0400 | [diff] [blame] | 2964 | * Temporarily set r/wsize for matching superblock. If we end up using |
| 2965 | * new sb then client will later negotiate it downward if needed. |
Pavel Shilovsky | 25c7f41 | 2011-05-26 23:35:47 +0400 | [diff] [blame] | 2966 | */ |
Jeff Layton | 5eba8ab | 2011-10-19 15:30:26 -0400 | [diff] [blame] | 2967 | cifs_sb->rsize = pvolume_info->rsize; |
Pavel Shilovsky | 25c7f41 | 2011-05-26 23:35:47 +0400 | [diff] [blame] | 2968 | cifs_sb->wsize = pvolume_info->wsize; |
| 2969 | |
Steve French | 3b79521 | 2008-11-13 19:45:32 +0000 | [diff] [blame] | 2970 | cifs_sb->mnt_uid = pvolume_info->linux_uid; |
| 2971 | cifs_sb->mnt_gid = pvolume_info->linux_gid; |
Shirish Pargaonkar | 3d3ea8e | 2011-09-26 09:56:44 -0500 | [diff] [blame] | 2972 | if (pvolume_info->backupuid_specified) |
| 2973 | cifs_sb->mnt_backupuid = pvolume_info->backupuid; |
| 2974 | if (pvolume_info->backupgid_specified) |
| 2975 | cifs_sb->mnt_backupgid = pvolume_info->backupgid; |
Steve French | 3b79521 | 2008-11-13 19:45:32 +0000 | [diff] [blame] | 2976 | cifs_sb->mnt_file_mode = pvolume_info->file_mode; |
| 2977 | cifs_sb->mnt_dir_mode = pvolume_info->dir_mode; |
Al Viro | 5206efd | 2011-07-26 03:22:14 -0400 | [diff] [blame] | 2978 | cFYI(1, "file mode: 0x%hx dir mode: 0x%hx", |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 2979 | cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode); |
Steve French | 3b79521 | 2008-11-13 19:45:32 +0000 | [diff] [blame] | 2980 | |
Suresh Jayaraman | 6d20e84 | 2010-12-01 14:42:28 +0530 | [diff] [blame] | 2981 | cifs_sb->actimeo = pvolume_info->actimeo; |
Pavel Shilovsky | 724d9f1 | 2011-05-05 09:55:12 +0000 | [diff] [blame] | 2982 | cifs_sb->local_nls = pvolume_info->local_nls; |
Suresh Jayaraman | 6d20e84 | 2010-12-01 14:42:28 +0530 | [diff] [blame] | 2983 | |
Steve French | 3b79521 | 2008-11-13 19:45:32 +0000 | [diff] [blame] | 2984 | if (pvolume_info->noperm) |
| 2985 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM; |
| 2986 | if (pvolume_info->setuids) |
| 2987 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID; |
| 2988 | if (pvolume_info->server_ino) |
| 2989 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM; |
| 2990 | if (pvolume_info->remap) |
| 2991 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR; |
| 2992 | if (pvolume_info->no_xattr) |
| 2993 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR; |
| 2994 | if (pvolume_info->sfu_emul) |
| 2995 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL; |
| 2996 | if (pvolume_info->nobrl) |
| 2997 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL; |
Steve French | be65244 | 2009-02-23 15:21:59 +0000 | [diff] [blame] | 2998 | if (pvolume_info->nostrictsync) |
Steve French | 4717bed | 2009-02-24 14:44:19 +0000 | [diff] [blame] | 2999 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOSSYNC; |
Steve French | 13a6e42 | 2008-12-02 17:24:33 +0000 | [diff] [blame] | 3000 | if (pvolume_info->mand_lock) |
| 3001 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL; |
Pavel Shilovsky | d4ffff1 | 2011-05-26 06:02:00 +0000 | [diff] [blame] | 3002 | if (pvolume_info->rwpidforward) |
| 3003 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_RWPIDFORWARD; |
Steve French | 3b79521 | 2008-11-13 19:45:32 +0000 | [diff] [blame] | 3004 | if (pvolume_info->cifs_acl) |
| 3005 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL; |
Shirish Pargaonkar | 3d3ea8e | 2011-09-26 09:56:44 -0500 | [diff] [blame] | 3006 | if (pvolume_info->backupuid_specified) |
| 3007 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPUID; |
| 3008 | if (pvolume_info->backupgid_specified) |
| 3009 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPGID; |
Steve French | 3b79521 | 2008-11-13 19:45:32 +0000 | [diff] [blame] | 3010 | if (pvolume_info->override_uid) |
| 3011 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID; |
| 3012 | if (pvolume_info->override_gid) |
| 3013 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID; |
| 3014 | if (pvolume_info->dynperm) |
| 3015 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM; |
Suresh Jayaraman | fa1df75 | 2010-07-05 18:13:36 +0530 | [diff] [blame] | 3016 | if (pvolume_info->fsc) |
| 3017 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_FSCACHE; |
Jeff Layton | 0eb8a13 | 2010-10-06 19:51:12 -0400 | [diff] [blame] | 3018 | if (pvolume_info->multiuser) |
| 3019 | cifs_sb->mnt_cifs_flags |= (CIFS_MOUNT_MULTIUSER | |
| 3020 | CIFS_MOUNT_NO_PERM); |
Pavel Shilovsky | d39454f | 2011-01-24 14:16:35 -0500 | [diff] [blame] | 3021 | if (pvolume_info->strict_io) |
| 3022 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_STRICT_IO; |
Steve French | 3b79521 | 2008-11-13 19:45:32 +0000 | [diff] [blame] | 3023 | if (pvolume_info->direct_io) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 3024 | cFYI(1, "mounting share using direct i/o"); |
Steve French | 3b79521 | 2008-11-13 19:45:32 +0000 | [diff] [blame] | 3025 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO; |
| 3026 | } |
Stefan Metzmacher | 736a332 | 2010-07-30 14:56:00 +0200 | [diff] [blame] | 3027 | if (pvolume_info->mfsymlinks) { |
| 3028 | if (pvolume_info->sfu_emul) { |
| 3029 | cERROR(1, "mount option mfsymlinks ignored if sfu " |
| 3030 | "mount option is used"); |
| 3031 | } else { |
| 3032 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MF_SYMLINKS; |
| 3033 | } |
| 3034 | } |
Steve French | 3b79521 | 2008-11-13 19:45:32 +0000 | [diff] [blame] | 3035 | |
| 3036 | if ((pvolume_info->cifs_acl) && (pvolume_info->dynperm)) |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 3037 | cERROR(1, "mount option dynperm ignored if cifsacl " |
| 3038 | "mount option supported"); |
Jeff Layton | b1c8d2b | 2008-10-22 13:57:07 -0400 | [diff] [blame] | 3039 | } |
| 3040 | |
Jeff Layton | f7910cb | 2011-05-19 16:22:58 -0400 | [diff] [blame] | 3041 | /* |
Jeff Layton | 5eba8ab | 2011-10-19 15:30:26 -0400 | [diff] [blame] | 3042 | * When the server supports very large reads and writes via POSIX extensions, |
| 3043 | * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not |
| 3044 | * including the RFC1001 length. |
Jeff Layton | f7910cb | 2011-05-19 16:22:58 -0400 | [diff] [blame] | 3045 | * |
| 3046 | * Note that this might make for "interesting" allocation problems during |
Jeff Layton | 1190f6a | 2011-06-22 17:33:57 -0400 | [diff] [blame] | 3047 | * writeback however as we have to allocate an array of pointers for the |
| 3048 | * pages. A 16M write means ~32kb page array with PAGE_CACHE_SIZE == 4096. |
Jeff Layton | 5eba8ab | 2011-10-19 15:30:26 -0400 | [diff] [blame] | 3049 | * |
| 3050 | * For reads, there is a similar problem as we need to allocate an array |
| 3051 | * of kvecs to handle the receive, though that should only need to be done |
| 3052 | * once. |
Jeff Layton | f7910cb | 2011-05-19 16:22:58 -0400 | [diff] [blame] | 3053 | */ |
Jeff Layton | 1190f6a | 2011-06-22 17:33:57 -0400 | [diff] [blame] | 3054 | #define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4) |
Jeff Layton | 5eba8ab | 2011-10-19 15:30:26 -0400 | [diff] [blame] | 3055 | #define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4) |
Jeff Layton | f7910cb | 2011-05-19 16:22:58 -0400 | [diff] [blame] | 3056 | |
| 3057 | /* |
Jeff Layton | 5eba8ab | 2011-10-19 15:30:26 -0400 | [diff] [blame] | 3058 | * When the server doesn't allow large posix writes, only allow a rsize/wsize |
| 3059 | * of 2^17-1 minus the size of the call header. That allows for a read or |
| 3060 | * write up to the maximum size described by RFC1002. |
Jeff Layton | f7910cb | 2011-05-19 16:22:58 -0400 | [diff] [blame] | 3061 | */ |
Pavel Shilovsky | 94443f4 | 2011-10-07 18:57:45 +0400 | [diff] [blame] | 3062 | #define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4) |
Jeff Layton | 5eba8ab | 2011-10-19 15:30:26 -0400 | [diff] [blame] | 3063 | #define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4) |
Jeff Layton | f7910cb | 2011-05-19 16:22:58 -0400 | [diff] [blame] | 3064 | |
| 3065 | /* |
| 3066 | * The default wsize is 1M. find_get_pages seems to return a maximum of 256 |
| 3067 | * pages in a single call. With PAGE_CACHE_SIZE == 4k, this means we can fill |
| 3068 | * a single wsize request with a single call. |
| 3069 | */ |
Jeff Layton | 5eba8ab | 2011-10-19 15:30:26 -0400 | [diff] [blame] | 3070 | #define CIFS_DEFAULT_IOSIZE (1024 * 1024) |
| 3071 | |
| 3072 | /* |
Jeff Layton | ce91acb | 2012-01-17 16:08:51 -0500 | [diff] [blame] | 3073 | * Windows only supports a max of 60kb reads and 65535 byte writes. Default to |
| 3074 | * those values when posix extensions aren't in force. In actuality here, we |
| 3075 | * use 65536 to allow for a write that is a multiple of 4k. Most servers seem |
| 3076 | * to be ok with the extra byte even though Windows doesn't send writes that |
| 3077 | * are that large. |
| 3078 | * |
| 3079 | * Citation: |
| 3080 | * |
| 3081 | * http://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx |
Jeff Layton | 5eba8ab | 2011-10-19 15:30:26 -0400 | [diff] [blame] | 3082 | */ |
| 3083 | #define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024) |
Jeff Layton | ce91acb | 2012-01-17 16:08:51 -0500 | [diff] [blame] | 3084 | #define CIFS_DEFAULT_NON_POSIX_WSIZE (65536) |
Jeff Layton | f7910cb | 2011-05-19 16:22:58 -0400 | [diff] [blame] | 3085 | |
| 3086 | static unsigned int |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 3087 | cifs_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *pvolume_info) |
Jeff Layton | f7910cb | 2011-05-19 16:22:58 -0400 | [diff] [blame] | 3088 | { |
| 3089 | __u64 unix_cap = le64_to_cpu(tcon->fsUnixInfo.Capability); |
| 3090 | struct TCP_Server_Info *server = tcon->ses->server; |
Jeff Layton | ce91acb | 2012-01-17 16:08:51 -0500 | [diff] [blame] | 3091 | unsigned int wsize; |
| 3092 | |
| 3093 | /* start with specified wsize, or default */ |
| 3094 | if (pvolume_info->wsize) |
| 3095 | wsize = pvolume_info->wsize; |
| 3096 | else if (tcon->unix_ext && (unix_cap & CIFS_UNIX_LARGE_WRITE_CAP)) |
| 3097 | wsize = CIFS_DEFAULT_IOSIZE; |
| 3098 | else |
| 3099 | wsize = CIFS_DEFAULT_NON_POSIX_WSIZE; |
Jeff Layton | f7910cb | 2011-05-19 16:22:58 -0400 | [diff] [blame] | 3100 | |
| 3101 | /* can server support 24-bit write sizes? (via UNIX extensions) */ |
| 3102 | if (!tcon->unix_ext || !(unix_cap & CIFS_UNIX_LARGE_WRITE_CAP)) |
Jeff Layton | 1190f6a | 2011-06-22 17:33:57 -0400 | [diff] [blame] | 3103 | wsize = min_t(unsigned int, wsize, CIFS_MAX_RFC1002_WSIZE); |
Jeff Layton | f7910cb | 2011-05-19 16:22:58 -0400 | [diff] [blame] | 3104 | |
Jeff Layton | 1190f6a | 2011-06-22 17:33:57 -0400 | [diff] [blame] | 3105 | /* |
| 3106 | * no CAP_LARGE_WRITE_X or is signing enabled without CAP_UNIX set? |
| 3107 | * Limit it to max buffer offered by the server, minus the size of the |
| 3108 | * WRITEX header, not including the 4 byte RFC1001 length. |
| 3109 | */ |
| 3110 | if (!(server->capabilities & CAP_LARGE_WRITE_X) || |
| 3111 | (!(server->capabilities & CAP_UNIX) && |
| 3112 | (server->sec_mode & (SECMODE_SIGN_ENABLED|SECMODE_SIGN_REQUIRED)))) |
| 3113 | wsize = min_t(unsigned int, wsize, |
| 3114 | server->maxBuf - sizeof(WRITE_REQ) + 4); |
Jeff Layton | f7910cb | 2011-05-19 16:22:58 -0400 | [diff] [blame] | 3115 | |
| 3116 | /* hard limit of CIFS_MAX_WSIZE */ |
| 3117 | wsize = min_t(unsigned int, wsize, CIFS_MAX_WSIZE); |
| 3118 | |
| 3119 | return wsize; |
| 3120 | } |
| 3121 | |
Jeff Layton | 5eba8ab | 2011-10-19 15:30:26 -0400 | [diff] [blame] | 3122 | static unsigned int |
| 3123 | cifs_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *pvolume_info) |
| 3124 | { |
| 3125 | __u64 unix_cap = le64_to_cpu(tcon->fsUnixInfo.Capability); |
| 3126 | struct TCP_Server_Info *server = tcon->ses->server; |
| 3127 | unsigned int rsize, defsize; |
| 3128 | |
| 3129 | /* |
| 3130 | * Set default value... |
| 3131 | * |
| 3132 | * HACK alert! Ancient servers have very small buffers. Even though |
| 3133 | * MS-CIFS indicates that servers are only limited by the client's |
| 3134 | * bufsize for reads, testing against win98se shows that it throws |
| 3135 | * INVALID_PARAMETER errors if you try to request too large a read. |
| 3136 | * |
| 3137 | * If the server advertises a MaxBufferSize of less than one page, |
| 3138 | * assume that it also can't satisfy reads larger than that either. |
| 3139 | * |
| 3140 | * FIXME: Is there a better heuristic for this? |
| 3141 | */ |
| 3142 | if (tcon->unix_ext && (unix_cap & CIFS_UNIX_LARGE_READ_CAP)) |
| 3143 | defsize = CIFS_DEFAULT_IOSIZE; |
| 3144 | else if (server->capabilities & CAP_LARGE_READ_X) |
| 3145 | defsize = CIFS_DEFAULT_NON_POSIX_RSIZE; |
| 3146 | else if (server->maxBuf >= PAGE_CACHE_SIZE) |
| 3147 | defsize = CIFSMaxBufSize; |
| 3148 | else |
| 3149 | defsize = server->maxBuf - sizeof(READ_RSP); |
| 3150 | |
| 3151 | rsize = pvolume_info->rsize ? pvolume_info->rsize : defsize; |
| 3152 | |
| 3153 | /* |
| 3154 | * no CAP_LARGE_READ_X? Then MS-CIFS states that we must limit this to |
| 3155 | * the client's MaxBufferSize. |
| 3156 | */ |
| 3157 | if (!(server->capabilities & CAP_LARGE_READ_X)) |
| 3158 | rsize = min_t(unsigned int, CIFSMaxBufSize, rsize); |
| 3159 | |
| 3160 | /* hard limit of CIFS_MAX_RSIZE */ |
| 3161 | rsize = min_t(unsigned int, rsize, CIFS_MAX_RSIZE); |
| 3162 | |
| 3163 | return rsize; |
| 3164 | } |
| 3165 | |
Igor Mammedov | e4cce94 | 2009-02-10 14:10:26 +0300 | [diff] [blame] | 3166 | static int |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 3167 | is_path_accessible(int xid, struct cifs_tcon *tcon, |
Igor Mammedov | e4cce94 | 2009-02-10 14:10:26 +0300 | [diff] [blame] | 3168 | struct cifs_sb_info *cifs_sb, const char *full_path) |
| 3169 | { |
| 3170 | int rc; |
Igor Mammedov | e4cce94 | 2009-02-10 14:10:26 +0300 | [diff] [blame] | 3171 | FILE_ALL_INFO *pfile_info; |
| 3172 | |
Igor Mammedov | e4cce94 | 2009-02-10 14:10:26 +0300 | [diff] [blame] | 3173 | pfile_info = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); |
| 3174 | if (pfile_info == NULL) |
| 3175 | return -ENOMEM; |
| 3176 | |
| 3177 | rc = CIFSSMBQPathInfo(xid, tcon, full_path, pfile_info, |
| 3178 | 0 /* not legacy */, cifs_sb->local_nls, |
| 3179 | cifs_sb->mnt_cifs_flags & |
| 3180 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
Jeff Layton | 221d1d7 | 2011-05-17 06:40:30 -0400 | [diff] [blame] | 3181 | |
| 3182 | if (rc == -EOPNOTSUPP || rc == -EINVAL) |
| 3183 | rc = SMBQueryInformation(xid, tcon, full_path, pfile_info, |
| 3184 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & |
| 3185 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
Igor Mammedov | e4cce94 | 2009-02-10 14:10:26 +0300 | [diff] [blame] | 3186 | kfree(pfile_info); |
| 3187 | return rc; |
| 3188 | } |
| 3189 | |
Jeff Layton | b9bce2e | 2011-07-06 08:10:39 -0400 | [diff] [blame] | 3190 | static void |
| 3191 | cleanup_volume_info_contents(struct smb_vol *volume_info) |
Igor Mammedov | 1bfe73c | 2009-04-01 17:54:42 +0400 | [diff] [blame] | 3192 | { |
Sean Finney | b946845 | 2011-04-11 13:19:32 +0000 | [diff] [blame] | 3193 | kfree(volume_info->username); |
Igor Mammedov | 1bfe73c | 2009-04-01 17:54:42 +0400 | [diff] [blame] | 3194 | kzfree(volume_info->password); |
Steve French | 13589c4 | 2011-08-18 04:41:55 +0000 | [diff] [blame] | 3195 | if (volume_info->UNCip != volume_info->UNC + 2) |
| 3196 | kfree(volume_info->UNCip); |
Jesper Juhl | 95c7545 | 2011-08-27 18:58:34 +0200 | [diff] [blame] | 3197 | kfree(volume_info->UNC); |
Sean Finney | b946845 | 2011-04-11 13:19:32 +0000 | [diff] [blame] | 3198 | kfree(volume_info->domainname); |
| 3199 | kfree(volume_info->iocharset); |
Igor Mammedov | 1bfe73c | 2009-04-01 17:54:42 +0400 | [diff] [blame] | 3200 | kfree(volume_info->prepath); |
Igor Mammedov | 1bfe73c | 2009-04-01 17:54:42 +0400 | [diff] [blame] | 3201 | } |
| 3202 | |
Jeff Layton | b9bce2e | 2011-07-06 08:10:39 -0400 | [diff] [blame] | 3203 | void |
| 3204 | cifs_cleanup_volume_info(struct smb_vol *volume_info) |
| 3205 | { |
| 3206 | if (!volume_info) |
| 3207 | return; |
| 3208 | cleanup_volume_info_contents(volume_info); |
| 3209 | kfree(volume_info); |
| 3210 | } |
| 3211 | |
| 3212 | |
Steve French | 2d6d589 | 2009-04-09 00:36:44 +0000 | [diff] [blame] | 3213 | #ifdef CONFIG_CIFS_DFS_UPCALL |
Igor Mammedov | 1bfe73c | 2009-04-01 17:54:42 +0400 | [diff] [blame] | 3214 | /* build_path_to_root returns full path to root when |
| 3215 | * we do not have an exiting connection (tcon) */ |
| 3216 | static char * |
Jeff Layton | b2a0fa1 | 2011-07-06 08:10:36 -0400 | [diff] [blame] | 3217 | build_unc_path_to_root(const struct smb_vol *vol, |
Igor Mammedov | 1bfe73c | 2009-04-01 17:54:42 +0400 | [diff] [blame] | 3218 | const struct cifs_sb_info *cifs_sb) |
| 3219 | { |
Jeff Layton | b2a0fa1 | 2011-07-06 08:10:36 -0400 | [diff] [blame] | 3220 | char *full_path, *pos; |
| 3221 | unsigned int pplen = vol->prepath ? strlen(vol->prepath) : 0; |
| 3222 | unsigned int unc_len = strnlen(vol->UNC, MAX_TREE_SIZE + 1); |
Igor Mammedov | 1bfe73c | 2009-04-01 17:54:42 +0400 | [diff] [blame] | 3223 | |
Jeff Layton | b2a0fa1 | 2011-07-06 08:10:36 -0400 | [diff] [blame] | 3224 | full_path = kmalloc(unc_len + pplen + 1, GFP_KERNEL); |
Igor Mammedov | 1bfe73c | 2009-04-01 17:54:42 +0400 | [diff] [blame] | 3225 | if (full_path == NULL) |
| 3226 | return ERR_PTR(-ENOMEM); |
| 3227 | |
Jeff Layton | b2a0fa1 | 2011-07-06 08:10:36 -0400 | [diff] [blame] | 3228 | strncpy(full_path, vol->UNC, unc_len); |
| 3229 | pos = full_path + unc_len; |
| 3230 | |
| 3231 | if (pplen) { |
| 3232 | strncpy(pos, vol->prepath, pplen); |
| 3233 | pos += pplen; |
| 3234 | } |
| 3235 | |
| 3236 | *pos = '\0'; /* add trailing null */ |
Steve French | f87d39d | 2011-05-27 03:50:55 +0000 | [diff] [blame] | 3237 | convert_delimiter(full_path, CIFS_DIR_SEP(cifs_sb)); |
Jeff Layton | b2a0fa1 | 2011-07-06 08:10:36 -0400 | [diff] [blame] | 3238 | cFYI(1, "%s: full_path=%s", __func__, full_path); |
Igor Mammedov | 1bfe73c | 2009-04-01 17:54:42 +0400 | [diff] [blame] | 3239 | return full_path; |
| 3240 | } |
Sean Finney | dd61394 | 2011-04-11 13:19:30 +0000 | [diff] [blame] | 3241 | |
| 3242 | /* |
| 3243 | * Perform a dfs referral query for a share and (optionally) prefix |
| 3244 | * |
Sean Finney | 046462a | 2011-04-11 13:19:33 +0000 | [diff] [blame] | 3245 | * If a referral is found, cifs_sb->mountdata will be (re-)allocated |
| 3246 | * to a string containing updated options for the submount. Otherwise it |
| 3247 | * will be left untouched. |
Sean Finney | dd61394 | 2011-04-11 13:19:30 +0000 | [diff] [blame] | 3248 | * |
| 3249 | * Returns the rc from get_dfs_path to the caller, which can be used to |
| 3250 | * determine whether there were referrals. |
| 3251 | */ |
| 3252 | static int |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 3253 | expand_dfs_referral(int xid, struct cifs_ses *pSesInfo, |
Sean Finney | dd61394 | 2011-04-11 13:19:30 +0000 | [diff] [blame] | 3254 | struct smb_vol *volume_info, struct cifs_sb_info *cifs_sb, |
Sean Finney | 046462a | 2011-04-11 13:19:33 +0000 | [diff] [blame] | 3255 | int check_prefix) |
Sean Finney | dd61394 | 2011-04-11 13:19:30 +0000 | [diff] [blame] | 3256 | { |
| 3257 | int rc; |
| 3258 | unsigned int num_referrals = 0; |
| 3259 | struct dfs_info3_param *referrals = NULL; |
| 3260 | char *full_path = NULL, *ref_path = NULL, *mdata = NULL; |
| 3261 | |
| 3262 | full_path = build_unc_path_to_root(volume_info, cifs_sb); |
| 3263 | if (IS_ERR(full_path)) |
| 3264 | return PTR_ERR(full_path); |
| 3265 | |
| 3266 | /* For DFS paths, skip the first '\' of the UNC */ |
| 3267 | ref_path = check_prefix ? full_path + 1 : volume_info->UNC + 1; |
| 3268 | |
| 3269 | rc = get_dfs_path(xid, pSesInfo , ref_path, cifs_sb->local_nls, |
| 3270 | &num_referrals, &referrals, |
| 3271 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); |
| 3272 | |
| 3273 | if (!rc && num_referrals > 0) { |
| 3274 | char *fake_devname = NULL; |
| 3275 | |
| 3276 | mdata = cifs_compose_mount_options(cifs_sb->mountdata, |
| 3277 | full_path + 1, referrals, |
| 3278 | &fake_devname); |
| 3279 | |
| 3280 | free_dfs_info_array(referrals, num_referrals); |
Sean Finney | 046462a | 2011-04-11 13:19:33 +0000 | [diff] [blame] | 3281 | |
Sean Finney | dd61394 | 2011-04-11 13:19:30 +0000 | [diff] [blame] | 3282 | if (IS_ERR(mdata)) { |
| 3283 | rc = PTR_ERR(mdata); |
| 3284 | mdata = NULL; |
Jeff Layton | b9bce2e | 2011-07-06 08:10:39 -0400 | [diff] [blame] | 3285 | } else { |
| 3286 | cleanup_volume_info_contents(volume_info); |
| 3287 | memset(volume_info, '\0', sizeof(*volume_info)); |
| 3288 | rc = cifs_setup_volume_info(volume_info, mdata, |
| 3289 | fake_devname); |
Sean Finney | dd61394 | 2011-04-11 13:19:30 +0000 | [diff] [blame] | 3290 | } |
Jeff Layton | b9bce2e | 2011-07-06 08:10:39 -0400 | [diff] [blame] | 3291 | kfree(fake_devname); |
| 3292 | kfree(cifs_sb->mountdata); |
Sean Finney | 046462a | 2011-04-11 13:19:33 +0000 | [diff] [blame] | 3293 | cifs_sb->mountdata = mdata; |
Sean Finney | dd61394 | 2011-04-11 13:19:30 +0000 | [diff] [blame] | 3294 | } |
| 3295 | kfree(full_path); |
| 3296 | return rc; |
| 3297 | } |
Steve French | 2d6d589 | 2009-04-09 00:36:44 +0000 | [diff] [blame] | 3298 | #endif |
Igor Mammedov | 1bfe73c | 2009-04-01 17:54:42 +0400 | [diff] [blame] | 3299 | |
Jeff Layton | 04db79b | 2011-07-06 08:10:38 -0400 | [diff] [blame] | 3300 | static int |
| 3301 | cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data, |
| 3302 | const char *devname) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3303 | { |
Pavel Shilovsky | 724d9f1 | 2011-05-05 09:55:12 +0000 | [diff] [blame] | 3304 | int rc = 0; |
Sean Finney | dd61394 | 2011-04-11 13:19:30 +0000 | [diff] [blame] | 3305 | |
Jeff Layton | 04db79b | 2011-07-06 08:10:38 -0400 | [diff] [blame] | 3306 | if (cifs_parse_mount_options(mount_data, devname, volume_info)) |
| 3307 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3308 | |
Jeff Layton | 7586b76 | 2008-12-01 18:41:49 -0500 | [diff] [blame] | 3309 | if (volume_info->nullauth) { |
Jeff Layton | 04febab | 2012-01-17 16:09:15 -0500 | [diff] [blame] | 3310 | cFYI(1, "Anonymous login"); |
| 3311 | kfree(volume_info->username); |
| 3312 | volume_info->username = NULL; |
Jeff Layton | 7586b76 | 2008-12-01 18:41:49 -0500 | [diff] [blame] | 3313 | } else if (volume_info->username) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3314 | /* BB fixme parse for domain name here */ |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 3315 | cFYI(1, "Username: %s", volume_info->username); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3316 | } else { |
Steve French | bf82067 | 2005-12-01 22:32:42 -0800 | [diff] [blame] | 3317 | cifserror("No username specified"); |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 3318 | /* In userspace mount helper we can get user name from alternate |
| 3319 | locations such as env variables and files on disk */ |
Jeff Layton | 04db79b | 2011-07-06 08:10:38 -0400 | [diff] [blame] | 3320 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3321 | } |
| 3322 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3323 | /* this is needed for ASCII cp to Unicode converts */ |
Jeff Layton | 7586b76 | 2008-12-01 18:41:49 -0500 | [diff] [blame] | 3324 | if (volume_info->iocharset == NULL) { |
Jeff Layton | a5fc4ce | 2010-04-24 07:57:42 -0400 | [diff] [blame] | 3325 | /* load_nls_default cannot return null */ |
| 3326 | volume_info->local_nls = load_nls_default(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3327 | } else { |
Jeff Layton | a5fc4ce | 2010-04-24 07:57:42 -0400 | [diff] [blame] | 3328 | volume_info->local_nls = load_nls(volume_info->iocharset); |
| 3329 | if (volume_info->local_nls == NULL) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 3330 | cERROR(1, "CIFS mount error: iocharset %s not found", |
| 3331 | volume_info->iocharset); |
Jeff Layton | 04db79b | 2011-07-06 08:10:38 -0400 | [diff] [blame] | 3332 | return -ELIBACC; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3333 | } |
| 3334 | } |
Pavel Shilovsky | 724d9f1 | 2011-05-05 09:55:12 +0000 | [diff] [blame] | 3335 | |
Pavel Shilovsky | 724d9f1 | 2011-05-05 09:55:12 +0000 | [diff] [blame] | 3336 | return rc; |
Jeff Layton | 04db79b | 2011-07-06 08:10:38 -0400 | [diff] [blame] | 3337 | } |
| 3338 | |
| 3339 | struct smb_vol * |
| 3340 | cifs_get_volume_info(char *mount_data, const char *devname) |
| 3341 | { |
| 3342 | int rc; |
| 3343 | struct smb_vol *volume_info; |
| 3344 | |
| 3345 | volume_info = kzalloc(sizeof(struct smb_vol), GFP_KERNEL); |
| 3346 | if (!volume_info) |
| 3347 | return ERR_PTR(-ENOMEM); |
| 3348 | |
| 3349 | rc = cifs_setup_volume_info(volume_info, mount_data, devname); |
| 3350 | if (rc) { |
| 3351 | cifs_cleanup_volume_info(volume_info); |
| 3352 | volume_info = ERR_PTR(rc); |
| 3353 | } |
| 3354 | |
| 3355 | return volume_info; |
Pavel Shilovsky | 724d9f1 | 2011-05-05 09:55:12 +0000 | [diff] [blame] | 3356 | } |
| 3357 | |
Jeff Layton | 66bfaad | 2011-10-19 15:30:35 -0400 | [diff] [blame] | 3358 | /* make sure ra_pages is a multiple of rsize */ |
| 3359 | static inline unsigned int |
| 3360 | cifs_ra_pages(struct cifs_sb_info *cifs_sb) |
| 3361 | { |
| 3362 | unsigned int reads; |
| 3363 | unsigned int rsize_pages = cifs_sb->rsize / PAGE_CACHE_SIZE; |
| 3364 | |
| 3365 | if (rsize_pages >= default_backing_dev_info.ra_pages) |
| 3366 | return default_backing_dev_info.ra_pages; |
| 3367 | else if (rsize_pages == 0) |
| 3368 | return rsize_pages; |
| 3369 | |
| 3370 | reads = default_backing_dev_info.ra_pages / rsize_pages; |
| 3371 | return reads * rsize_pages; |
| 3372 | } |
| 3373 | |
Pavel Shilovsky | 724d9f1 | 2011-05-05 09:55:12 +0000 | [diff] [blame] | 3374 | int |
Al Viro | 2c6292a | 2011-06-17 09:05:48 -0400 | [diff] [blame] | 3375 | cifs_mount(struct cifs_sb_info *cifs_sb, struct smb_vol *volume_info) |
Pavel Shilovsky | 724d9f1 | 2011-05-05 09:55:12 +0000 | [diff] [blame] | 3376 | { |
Jeff Layton | 1daaae8 | 2012-03-21 06:30:40 -0400 | [diff] [blame] | 3377 | int rc; |
Pavel Shilovsky | 724d9f1 | 2011-05-05 09:55:12 +0000 | [diff] [blame] | 3378 | int xid; |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 3379 | struct cifs_ses *pSesInfo; |
| 3380 | struct cifs_tcon *tcon; |
Pavel Shilovsky | 724d9f1 | 2011-05-05 09:55:12 +0000 | [diff] [blame] | 3381 | struct TCP_Server_Info *srvTcp; |
| 3382 | char *full_path; |
| 3383 | struct tcon_link *tlink; |
| 3384 | #ifdef CONFIG_CIFS_DFS_UPCALL |
| 3385 | int referral_walks_count = 0; |
Jeff Layton | 2054749 | 2011-07-09 12:21:07 -0400 | [diff] [blame] | 3386 | #endif |
Al Viro | dd85446 | 2011-06-17 08:24:42 -0400 | [diff] [blame] | 3387 | |
| 3388 | rc = bdi_setup_and_register(&cifs_sb->bdi, "cifs", BDI_CAP_MAP_COPY); |
| 3389 | if (rc) |
| 3390 | return rc; |
| 3391 | |
Jeff Layton | 2054749 | 2011-07-09 12:21:07 -0400 | [diff] [blame] | 3392 | #ifdef CONFIG_CIFS_DFS_UPCALL |
Pavel Shilovsky | 724d9f1 | 2011-05-05 09:55:12 +0000 | [diff] [blame] | 3393 | try_mount_again: |
| 3394 | /* cleanup activities if we're chasing a referral */ |
| 3395 | if (referral_walks_count) { |
| 3396 | if (tcon) |
| 3397 | cifs_put_tcon(tcon); |
| 3398 | else if (pSesInfo) |
| 3399 | cifs_put_smb_ses(pSesInfo); |
| 3400 | |
Pavel Shilovsky | 724d9f1 | 2011-05-05 09:55:12 +0000 | [diff] [blame] | 3401 | FreeXid(xid); |
| 3402 | } |
| 3403 | #endif |
Jeff Layton | 1daaae8 | 2012-03-21 06:30:40 -0400 | [diff] [blame] | 3404 | rc = 0; |
Pavel Shilovsky | 724d9f1 | 2011-05-05 09:55:12 +0000 | [diff] [blame] | 3405 | tcon = NULL; |
| 3406 | pSesInfo = NULL; |
| 3407 | srvTcp = NULL; |
| 3408 | full_path = NULL; |
| 3409 | tlink = NULL; |
| 3410 | |
| 3411 | xid = GetXid(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3412 | |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 3413 | /* get a reference to a tcp session */ |
Jeff Layton | 7586b76 | 2008-12-01 18:41:49 -0500 | [diff] [blame] | 3414 | srvTcp = cifs_get_tcp_session(volume_info); |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 3415 | if (IS_ERR(srvTcp)) { |
| 3416 | rc = PTR_ERR(srvTcp); |
Al Viro | dd85446 | 2011-06-17 08:24:42 -0400 | [diff] [blame] | 3417 | bdi_destroy(&cifs_sb->bdi); |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 3418 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3419 | } |
| 3420 | |
Jeff Layton | 36988c7 | 2010-04-24 07:57:43 -0400 | [diff] [blame] | 3421 | /* get a reference to a SMB session */ |
| 3422 | pSesInfo = cifs_get_smb_ses(srvTcp, volume_info); |
| 3423 | if (IS_ERR(pSesInfo)) { |
| 3424 | rc = PTR_ERR(pSesInfo); |
| 3425 | pSesInfo = NULL; |
| 3426 | goto mount_fail_check; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3427 | } |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 3428 | |
Jeff Layton | d00c28d | 2010-04-24 07:57:44 -0400 | [diff] [blame] | 3429 | /* search for existing tcon to this server share */ |
| 3430 | tcon = cifs_get_tcon(pSesInfo, volume_info); |
| 3431 | if (IS_ERR(tcon)) { |
| 3432 | rc = PTR_ERR(tcon); |
| 3433 | tcon = NULL; |
Igor Mammedov | 1bfe73c | 2009-04-01 17:54:42 +0400 | [diff] [blame] | 3434 | goto remote_path_check; |
Jeff Layton | d00c28d | 2010-04-24 07:57:44 -0400 | [diff] [blame] | 3435 | } |
Igor Mammedov | 1bfe73c | 2009-04-01 17:54:42 +0400 | [diff] [blame] | 3436 | |
Steve French | 6848b73 | 2011-05-26 18:38:54 +0000 | [diff] [blame] | 3437 | /* tell server which Unix caps we support */ |
| 3438 | if (tcon->ses->capabilities & CAP_UNIX) { |
| 3439 | /* reset of caps checks mount to see if unix extensions |
| 3440 | disabled for just this mount */ |
Al Viro | 2c6292a | 2011-06-17 09:05:48 -0400 | [diff] [blame] | 3441 | reset_cifs_unix_caps(xid, tcon, cifs_sb, volume_info); |
Steve French | 6848b73 | 2011-05-26 18:38:54 +0000 | [diff] [blame] | 3442 | if ((tcon->ses->server->tcpStatus == CifsNeedReconnect) && |
| 3443 | (le64_to_cpu(tcon->fsUnixInfo.Capability) & |
| 3444 | CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)) { |
| 3445 | rc = -EACCES; |
| 3446 | goto mount_fail_check; |
| 3447 | } |
| 3448 | } else |
| 3449 | tcon->unix_ext = 0; /* server does not support them */ |
| 3450 | |
Steve French | d82c2df | 2008-11-15 00:07:26 +0000 | [diff] [blame] | 3451 | /* do not care if following two calls succeed - informational */ |
| 3452 | if (!tcon->ipc) { |
| 3453 | CIFSSMBQFSDeviceInfo(xid, tcon); |
| 3454 | CIFSSMBQFSAttributeInfo(xid, tcon); |
| 3455 | } |
| 3456 | |
Jeff Layton | f7910cb | 2011-05-19 16:22:58 -0400 | [diff] [blame] | 3457 | cifs_sb->wsize = cifs_negotiate_wsize(tcon, volume_info); |
Jeff Layton | 5eba8ab | 2011-10-19 15:30:26 -0400 | [diff] [blame] | 3458 | cifs_sb->rsize = cifs_negotiate_rsize(tcon, volume_info); |
Jeff Layton | f7910cb | 2011-05-19 16:22:58 -0400 | [diff] [blame] | 3459 | |
Jeff Layton | 66bfaad | 2011-10-19 15:30:35 -0400 | [diff] [blame] | 3460 | /* tune readahead according to rsize */ |
| 3461 | cifs_sb->bdi.ra_pages = cifs_ra_pages(cifs_sb); |
Jeff Layton | 03ceace | 2010-12-06 21:07:33 -0500 | [diff] [blame] | 3462 | |
Igor Mammedov | e4cce94 | 2009-02-10 14:10:26 +0300 | [diff] [blame] | 3463 | remote_path_check: |
| 3464 | #ifdef CONFIG_CIFS_DFS_UPCALL |
| 3465 | /* |
| 3466 | * Perform an unconditional check for whether there are DFS |
| 3467 | * referrals for this path without prefix, to provide support |
| 3468 | * for DFS referrals from w2k8 servers which don't seem to respond |
Igor Mammedov | 1bfe73c | 2009-04-01 17:54:42 +0400 | [diff] [blame] | 3469 | * with PATH_NOT_COVERED to requests that include the prefix. |
| 3470 | * Chase the referral if found, otherwise continue normally. |
Steve French | d036f50 | 2009-04-03 03:12:08 +0000 | [diff] [blame] | 3471 | */ |
Igor Mammedov | 5c2503a | 2009-04-21 19:31:05 +0400 | [diff] [blame] | 3472 | if (referral_walks_count == 0) { |
| 3473 | int refrc = expand_dfs_referral(xid, pSesInfo, volume_info, |
| 3474 | cifs_sb, false); |
| 3475 | if (!refrc) { |
| 3476 | referral_walks_count++; |
| 3477 | goto try_mount_again; |
| 3478 | } |
| 3479 | } |
| 3480 | #endif |
| 3481 | |
Steve French | f87d39d | 2011-05-27 03:50:55 +0000 | [diff] [blame] | 3482 | /* check if a whole path is not remote */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3483 | if (!rc && tcon) { |
| 3484 | /* build_path_to_root works only when we have a valid tcon */ |
Steve French | f87d39d | 2011-05-27 03:50:55 +0000 | [diff] [blame] | 3485 | full_path = cifs_build_path_to_root(volume_info, cifs_sb, tcon); |
Steve French | 7c7b25b | 2006-06-01 19:20:10 +0000 | [diff] [blame] | 3486 | if (full_path == NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3487 | rc = -ENOMEM; |
| 3488 | goto mount_fail_check; |
| 3489 | } |
| 3490 | rc = is_path_accessible(xid, tcon, cifs_sb, full_path); |
| 3491 | if (rc != 0 && rc != -EREMOTE) { |
| 3492 | kfree(full_path); |
| 3493 | goto mount_fail_check; |
| 3494 | } |
| 3495 | kfree(full_path); |
| 3496 | } |
| 3497 | |
| 3498 | /* get referral if needed */ |
| 3499 | if (rc == -EREMOTE) { |
| 3500 | #ifdef CONFIG_CIFS_DFS_UPCALL |
| 3501 | if (referral_walks_count > MAX_NESTED_LINKS) { |
| 3502 | /* |
Steve French | eeac804 | 2006-01-13 21:34:58 -0800 | [diff] [blame] | 3503 | * BB: when we implement proper loop detection, |
Steve French | 4523cc3 | 2007-04-30 20:13:06 +0000 | [diff] [blame] | 3504 | * we will remove this check. But now we need it |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3505 | * to prevent an indefinite loop if 'DFS tree' is |
| 3506 | * misconfigured (i.e. has loops). |
| 3507 | */ |
| 3508 | rc = -ELOOP; |
Igor Mammedov | 1bfe73c | 2009-04-01 17:54:42 +0400 | [diff] [blame] | 3509 | goto mount_fail_check; |
| 3510 | } |
Igor Mammedov | 1bfe73c | 2009-04-01 17:54:42 +0400 | [diff] [blame] | 3511 | |
Sean Finney | dd61394 | 2011-04-11 13:19:30 +0000 | [diff] [blame] | 3512 | rc = expand_dfs_referral(xid, pSesInfo, volume_info, cifs_sb, |
Sean Finney | 046462a | 2011-04-11 13:19:33 +0000 | [diff] [blame] | 3513 | true); |
Jeff Layton | 7b91e26 | 2009-07-23 15:22:30 -0400 | [diff] [blame] | 3514 | |
Sean Finney | dd61394 | 2011-04-11 13:19:30 +0000 | [diff] [blame] | 3515 | if (!rc) { |
Igor Mammedov | 5c2503a | 2009-04-21 19:31:05 +0400 | [diff] [blame] | 3516 | referral_walks_count++; |
Igor Mammedov | 1bfe73c | 2009-04-01 17:54:42 +0400 | [diff] [blame] | 3517 | goto try_mount_again; |
| 3518 | } |
Sean Finney | dd61394 | 2011-04-11 13:19:30 +0000 | [diff] [blame] | 3519 | goto mount_fail_check; |
Steve French | d036f50 | 2009-04-03 03:12:08 +0000 | [diff] [blame] | 3520 | #else /* No DFS support, return error on mount */ |
| 3521 | rc = -EOPNOTSUPP; |
| 3522 | #endif |
Igor Mammedov | 1bfe73c | 2009-04-01 17:54:42 +0400 | [diff] [blame] | 3523 | } |
| 3524 | |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 3525 | if (rc) |
| 3526 | goto mount_fail_check; |
| 3527 | |
| 3528 | /* now, hang the tcon off of the superblock */ |
| 3529 | tlink = kzalloc(sizeof *tlink, GFP_KERNEL); |
| 3530 | if (tlink == NULL) { |
| 3531 | rc = -ENOMEM; |
| 3532 | goto mount_fail_check; |
| 3533 | } |
| 3534 | |
Jeff Layton | b647c35 | 2010-10-28 11:16:44 -0400 | [diff] [blame] | 3535 | tlink->tl_uid = pSesInfo->linux_uid; |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 3536 | tlink->tl_tcon = tcon; |
| 3537 | tlink->tl_time = jiffies; |
| 3538 | set_bit(TCON_LINK_MASTER, &tlink->tl_flags); |
| 3539 | set_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); |
| 3540 | |
Jeff Layton | 413e661 | 2010-10-28 13:33:38 -0400 | [diff] [blame] | 3541 | cifs_sb->master_tlink = tlink; |
Jeff Layton | b647c35 | 2010-10-28 11:16:44 -0400 | [diff] [blame] | 3542 | spin_lock(&cifs_sb->tlink_tree_lock); |
| 3543 | tlink_rb_insert(&cifs_sb->tlink_tree, tlink); |
| 3544 | spin_unlock(&cifs_sb->tlink_tree_lock); |
Jeff Layton | 413e661 | 2010-10-28 13:33:38 -0400 | [diff] [blame] | 3545 | |
Jeff Layton | 2de970f | 2010-10-06 19:51:12 -0400 | [diff] [blame] | 3546 | queue_delayed_work(system_nrt_wq, &cifs_sb->prune_tlinks, |
| 3547 | TLINK_IDLE_EXPIRE); |
| 3548 | |
Igor Mammedov | 1bfe73c | 2009-04-01 17:54:42 +0400 | [diff] [blame] | 3549 | mount_fail_check: |
| 3550 | /* on error free sesinfo and tcon struct if needed */ |
| 3551 | if (rc) { |
Igor Mammedov | 1bfe73c | 2009-04-01 17:54:42 +0400 | [diff] [blame] | 3552 | /* If find_unc succeeded then rc == 0 so we can not end */ |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 3553 | /* up accidentally freeing someone elses tcon struct */ |
Igor Mammedov | 1bfe73c | 2009-04-01 17:54:42 +0400 | [diff] [blame] | 3554 | if (tcon) |
| 3555 | cifs_put_tcon(tcon); |
| 3556 | else if (pSesInfo) |
| 3557 | cifs_put_smb_ses(pSesInfo); |
| 3558 | else |
| 3559 | cifs_put_tcp_session(srvTcp); |
Al Viro | dd85446 | 2011-06-17 08:24:42 -0400 | [diff] [blame] | 3560 | bdi_destroy(&cifs_sb->bdi); |
Igor Mammedov | 1bfe73c | 2009-04-01 17:54:42 +0400 | [diff] [blame] | 3561 | } |
| 3562 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3563 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3564 | FreeXid(xid); |
| 3565 | return rc; |
| 3566 | } |
| 3567 | |
Jeff Layton | 8d1bca3 | 2011-06-11 21:17:10 -0400 | [diff] [blame] | 3568 | /* |
| 3569 | * Issue a TREE_CONNECT request. Note that for IPC$ shares, that the tcon |
| 3570 | * pointer may be NULL. |
| 3571 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3572 | int |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 3573 | CIFSTCon(unsigned int xid, struct cifs_ses *ses, |
| 3574 | const char *tree, struct cifs_tcon *tcon, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3575 | const struct nls_table *nls_codepage) |
| 3576 | { |
| 3577 | struct smb_hdr *smb_buffer; |
| 3578 | struct smb_hdr *smb_buffer_response; |
| 3579 | TCONX_REQ *pSMB; |
| 3580 | TCONX_RSP *pSMBr; |
| 3581 | unsigned char *bcc_ptr; |
| 3582 | int rc = 0; |
Jeff Layton | 690c522 | 2011-01-20 13:36:51 -0500 | [diff] [blame] | 3583 | int length; |
| 3584 | __u16 bytes_left, count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3585 | |
| 3586 | if (ses == NULL) |
| 3587 | return -EIO; |
| 3588 | |
| 3589 | smb_buffer = cifs_buf_get(); |
Steve French | ca43e3b | 2009-09-01 17:20:50 +0000 | [diff] [blame] | 3590 | if (smb_buffer == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3591 | return -ENOMEM; |
Steve French | ca43e3b | 2009-09-01 17:20:50 +0000 | [diff] [blame] | 3592 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3593 | smb_buffer_response = smb_buffer; |
| 3594 | |
| 3595 | header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX, |
| 3596 | NULL /*no tid */ , 4 /*wct */ ); |
Steve French | 1982c34 | 2005-08-17 12:38:22 -0700 | [diff] [blame] | 3597 | |
| 3598 | smb_buffer->Mid = GetNextMid(ses->server); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3599 | smb_buffer->Uid = ses->Suid; |
| 3600 | pSMB = (TCONX_REQ *) smb_buffer; |
| 3601 | pSMBr = (TCONX_RSP *) smb_buffer_response; |
| 3602 | |
| 3603 | pSMB->AndXCommand = 0xFF; |
| 3604 | pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3605 | bcc_ptr = &pSMB->Password[0]; |
Jeff Layton | 8d1bca3 | 2011-06-11 21:17:10 -0400 | [diff] [blame] | 3606 | if (!tcon || (ses->server->sec_mode & SECMODE_USER)) { |
Steve French | eeac804 | 2006-01-13 21:34:58 -0800 | [diff] [blame] | 3607 | pSMB->PasswordLength = cpu_to_le16(1); /* minimum */ |
Steve French | 7c7b25b | 2006-06-01 19:20:10 +0000 | [diff] [blame] | 3608 | *bcc_ptr = 0; /* password is null byte */ |
Steve French | eeac804 | 2006-01-13 21:34:58 -0800 | [diff] [blame] | 3609 | bcc_ptr++; /* skip password */ |
Steve French | 7c7b25b | 2006-06-01 19:20:10 +0000 | [diff] [blame] | 3610 | /* already aligned so no need to do it below */ |
Steve French | eeac804 | 2006-01-13 21:34:58 -0800 | [diff] [blame] | 3611 | } else { |
Shirish Pargaonkar | 540b2e3 | 2011-01-18 22:33:54 -0600 | [diff] [blame] | 3612 | pSMB->PasswordLength = cpu_to_le16(CIFS_AUTH_RESP_SIZE); |
Steve French | eeac804 | 2006-01-13 21:34:58 -0800 | [diff] [blame] | 3613 | /* BB FIXME add code to fail this if NTLMv2 or Kerberos |
| 3614 | specified as required (when that support is added to |
| 3615 | the vfs in the future) as only NTLM or the much |
Steve French | 7c7b25b | 2006-06-01 19:20:10 +0000 | [diff] [blame] | 3616 | weaker LANMAN (which we do not send by default) is accepted |
Steve French | eeac804 | 2006-01-13 21:34:58 -0800 | [diff] [blame] | 3617 | by Samba (not sure whether other servers allow |
| 3618 | NTLMv2 password here) */ |
Steve French | 7c7b25b | 2006-06-01 19:20:10 +0000 | [diff] [blame] | 3619 | #ifdef CONFIG_CIFS_WEAK_PW_HASH |
Jeff Layton | 04912d6 | 2010-04-24 07:57:45 -0400 | [diff] [blame] | 3620 | if ((global_secflags & CIFSSEC_MAY_LANMAN) && |
Jeff Layton | 00e485b | 2008-12-05 20:41:21 -0500 | [diff] [blame] | 3621 | (ses->server->secType == LANMAN)) |
Shirish Pargaonkar | d3ba50b | 2010-10-27 15:20:36 -0500 | [diff] [blame] | 3622 | calc_lanman_hash(tcon->password, ses->server->cryptkey, |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 3623 | ses->server->sec_mode & |
Jeff Layton | 4e53a3f | 2008-12-05 20:41:21 -0500 | [diff] [blame] | 3624 | SECMODE_PW_ENCRYPT ? true : false, |
| 3625 | bcc_ptr); |
Steve French | 7c7b25b | 2006-06-01 19:20:10 +0000 | [diff] [blame] | 3626 | else |
| 3627 | #endif /* CIFS_WEAK_PW_HASH */ |
Shirish Pargaonkar | ee2c925 | 2011-01-27 09:58:04 -0600 | [diff] [blame] | 3628 | rc = SMBNTencrypt(tcon->password, ses->server->cryptkey, |
Shirish Pargaonkar | 9ef5992 | 2011-10-20 13:21:59 -0500 | [diff] [blame] | 3629 | bcc_ptr, nls_codepage); |
Steve French | eeac804 | 2006-01-13 21:34:58 -0800 | [diff] [blame] | 3630 | |
Shirish Pargaonkar | 540b2e3 | 2011-01-18 22:33:54 -0600 | [diff] [blame] | 3631 | bcc_ptr += CIFS_AUTH_RESP_SIZE; |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 3632 | if (ses->capabilities & CAP_UNICODE) { |
Steve French | 7c7b25b | 2006-06-01 19:20:10 +0000 | [diff] [blame] | 3633 | /* must align unicode strings */ |
| 3634 | *bcc_ptr = 0; /* null byte password */ |
| 3635 | bcc_ptr++; |
| 3636 | } |
Steve French | eeac804 | 2006-01-13 21:34:58 -0800 | [diff] [blame] | 3637 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3638 | |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 3639 | if (ses->server->sec_mode & |
Steve French | a878fb2 | 2006-05-30 18:04:19 +0000 | [diff] [blame] | 3640 | (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3641 | smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE; |
| 3642 | |
| 3643 | if (ses->capabilities & CAP_STATUS32) { |
| 3644 | smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS; |
| 3645 | } |
| 3646 | if (ses->capabilities & CAP_DFS) { |
| 3647 | smb_buffer->Flags2 |= SMBFLG2_DFS; |
| 3648 | } |
| 3649 | if (ses->capabilities & CAP_UNICODE) { |
| 3650 | smb_buffer->Flags2 |= SMBFLG2_UNICODE; |
| 3651 | length = |
Steve French | acbbb76 | 2012-01-18 22:32:33 -0600 | [diff] [blame] | 3652 | cifs_strtoUTF16((__le16 *) bcc_ptr, tree, |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 3653 | 6 /* max utf8 char length in bytes */ * |
Steve French | a878fb2 | 2006-05-30 18:04:19 +0000 | [diff] [blame] | 3654 | (/* server len*/ + 256 /* share len */), nls_codepage); |
| 3655 | bcc_ptr += 2 * length; /* convert num 16 bit words to bytes */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3656 | bcc_ptr += 2; /* skip trailing null */ |
| 3657 | } else { /* ASCII */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3658 | strcpy(bcc_ptr, tree); |
| 3659 | bcc_ptr += strlen(tree) + 1; |
| 3660 | } |
| 3661 | strcpy(bcc_ptr, "?????"); |
| 3662 | bcc_ptr += strlen("?????"); |
| 3663 | bcc_ptr += 1; |
| 3664 | count = bcc_ptr - &pSMB->Password[0]; |
Steve French | be8e3b0 | 2011-04-29 05:40:20 +0000 | [diff] [blame] | 3665 | pSMB->hdr.smb_buf_length = cpu_to_be32(be32_to_cpu( |
| 3666 | pSMB->hdr.smb_buf_length) + count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3667 | pSMB->ByteCount = cpu_to_le16(count); |
| 3668 | |
Steve French | 133672e | 2007-11-13 22:41:37 +0000 | [diff] [blame] | 3669 | rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length, |
Jeff Layton | 7749981 | 2011-01-11 07:24:23 -0500 | [diff] [blame] | 3670 | 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3671 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3672 | /* above now done in SendReceive */ |
| 3673 | if ((rc == 0) && (tcon != NULL)) { |
Steve French | 0e0d2cf | 2009-05-01 05:27:32 +0000 | [diff] [blame] | 3674 | bool is_unicode; |
| 3675 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3676 | tcon->tidStatus = CifsGood; |
Steve French | 3b79521 | 2008-11-13 19:45:32 +0000 | [diff] [blame] | 3677 | tcon->need_reconnect = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3678 | tcon->tid = smb_buffer_response->Tid; |
| 3679 | bcc_ptr = pByteArea(smb_buffer_response); |
Jeff Layton | 690c522 | 2011-01-20 13:36:51 -0500 | [diff] [blame] | 3680 | bytes_left = get_bcc(smb_buffer_response); |
Jeff Layton | cc20c03 | 2009-04-30 07:16:21 -0400 | [diff] [blame] | 3681 | length = strnlen(bcc_ptr, bytes_left - 2); |
Steve French | 0e0d2cf | 2009-05-01 05:27:32 +0000 | [diff] [blame] | 3682 | if (smb_buffer->Flags2 & SMBFLG2_UNICODE) |
| 3683 | is_unicode = true; |
| 3684 | else |
| 3685 | is_unicode = false; |
| 3686 | |
Jeff Layton | cc20c03 | 2009-04-30 07:16:21 -0400 | [diff] [blame] | 3687 | |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 3688 | /* skip service field (NB: this field is always ASCII) */ |
Steve French | 7f8ed42 | 2007-09-28 22:28:55 +0000 | [diff] [blame] | 3689 | if (length == 3) { |
| 3690 | if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') && |
| 3691 | (bcc_ptr[2] == 'C')) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 3692 | cFYI(1, "IPC connection"); |
Steve French | 7f8ed42 | 2007-09-28 22:28:55 +0000 | [diff] [blame] | 3693 | tcon->ipc = 1; |
| 3694 | } |
| 3695 | } else if (length == 2) { |
| 3696 | if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) { |
| 3697 | /* the most common case */ |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 3698 | cFYI(1, "disk share connection"); |
Steve French | 7f8ed42 | 2007-09-28 22:28:55 +0000 | [diff] [blame] | 3699 | } |
| 3700 | } |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 3701 | bcc_ptr += length + 1; |
Jeff Layton | cc20c03 | 2009-04-30 07:16:21 -0400 | [diff] [blame] | 3702 | bytes_left -= (length + 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3703 | strncpy(tcon->treeName, tree, MAX_TREE_SIZE); |
Jeff Layton | cc20c03 | 2009-04-30 07:16:21 -0400 | [diff] [blame] | 3704 | |
| 3705 | /* mostly informational -- no need to fail on error here */ |
Jeff Layton | 90a98b2 | 2009-07-20 13:40:52 -0400 | [diff] [blame] | 3706 | kfree(tcon->nativeFileSystem); |
Steve French | acbbb76 | 2012-01-18 22:32:33 -0600 | [diff] [blame] | 3707 | tcon->nativeFileSystem = cifs_strndup_from_utf16(bcc_ptr, |
Steve French | 0e0d2cf | 2009-05-01 05:27:32 +0000 | [diff] [blame] | 3708 | bytes_left, is_unicode, |
Jeff Layton | cc20c03 | 2009-04-30 07:16:21 -0400 | [diff] [blame] | 3709 | nls_codepage); |
| 3710 | |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 3711 | cFYI(1, "nativeFileSystem=%s", tcon->nativeFileSystem); |
Jeff Layton | cc20c03 | 2009-04-30 07:16:21 -0400 | [diff] [blame] | 3712 | |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 3713 | if ((smb_buffer_response->WordCount == 3) || |
Steve French | 1a4e15a | 2006-10-12 21:33:51 +0000 | [diff] [blame] | 3714 | (smb_buffer_response->WordCount == 7)) |
| 3715 | /* field is in same location */ |
Steve French | 3979877 | 2006-05-31 22:40:51 +0000 | [diff] [blame] | 3716 | tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport); |
| 3717 | else |
| 3718 | tcon->Flags = 0; |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 3719 | cFYI(1, "Tcon flags: 0x%x ", tcon->Flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3720 | } else if ((rc == 0) && tcon == NULL) { |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 3721 | /* all we need to save for IPC$ connection */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3722 | ses->ipc_tid = smb_buffer_response->Tid; |
| 3723 | } |
| 3724 | |
Mariusz Kozlowski | a8a11d3 | 2007-10-03 16:41:24 +0000 | [diff] [blame] | 3725 | cifs_buf_release(smb_buffer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3726 | return rc; |
| 3727 | } |
| 3728 | |
Al Viro | 2a9b995 | 2011-06-17 09:27:16 -0400 | [diff] [blame] | 3729 | void |
| 3730 | cifs_umount(struct cifs_sb_info *cifs_sb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3731 | { |
Jeff Layton | b647c35 | 2010-10-28 11:16:44 -0400 | [diff] [blame] | 3732 | struct rb_root *root = &cifs_sb->tlink_tree; |
| 3733 | struct rb_node *node; |
| 3734 | struct tcon_link *tlink; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3735 | |
Jeff Layton | 2de970f | 2010-10-06 19:51:12 -0400 | [diff] [blame] | 3736 | cancel_delayed_work_sync(&cifs_sb->prune_tlinks); |
| 3737 | |
Jeff Layton | b647c35 | 2010-10-28 11:16:44 -0400 | [diff] [blame] | 3738 | spin_lock(&cifs_sb->tlink_tree_lock); |
| 3739 | while ((node = rb_first(root))) { |
| 3740 | tlink = rb_entry(node, struct tcon_link, tl_rbnode); |
| 3741 | cifs_get_tlink(tlink); |
| 3742 | clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); |
| 3743 | rb_erase(node, root); |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 3744 | |
Jeff Layton | b647c35 | 2010-10-28 11:16:44 -0400 | [diff] [blame] | 3745 | spin_unlock(&cifs_sb->tlink_tree_lock); |
| 3746 | cifs_put_tlink(tlink); |
| 3747 | spin_lock(&cifs_sb->tlink_tree_lock); |
| 3748 | } |
| 3749 | spin_unlock(&cifs_sb->tlink_tree_lock); |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 3750 | |
Al Viro | dd85446 | 2011-06-17 08:24:42 -0400 | [diff] [blame] | 3751 | bdi_destroy(&cifs_sb->bdi); |
Al Viro | d757d71 | 2011-06-17 09:42:43 -0400 | [diff] [blame] | 3752 | kfree(cifs_sb->mountdata); |
| 3753 | unload_nls(cifs_sb->local_nls); |
| 3754 | kfree(cifs_sb); |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 3755 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3756 | |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 3757 | int cifs_negotiate_protocol(unsigned int xid, struct cifs_ses *ses) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3758 | { |
| 3759 | int rc = 0; |
Jeff Layton | 198b568 | 2010-04-24 07:57:48 -0400 | [diff] [blame] | 3760 | struct TCP_Server_Info *server = ses->server; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3761 | |
Jeff Layton | 198b568 | 2010-04-24 07:57:48 -0400 | [diff] [blame] | 3762 | /* only send once per connect */ |
| 3763 | if (server->maxBuf != 0) |
| 3764 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3765 | |
Pavel Shilovsky | 2d86dbc | 2012-02-06 15:59:18 +0400 | [diff] [blame] | 3766 | cifs_set_credits(server, 1); |
Jeff Layton | 198b568 | 2010-04-24 07:57:48 -0400 | [diff] [blame] | 3767 | rc = CIFSSMBNegotiate(xid, ses); |
| 3768 | if (rc == -EAGAIN) { |
| 3769 | /* retry only once on 1st time connection */ |
Pavel Shilovsky | 2d86dbc | 2012-02-06 15:59:18 +0400 | [diff] [blame] | 3770 | cifs_set_credits(server, 1); |
Jeff Layton | 198b568 | 2010-04-24 07:57:48 -0400 | [diff] [blame] | 3771 | rc = CIFSSMBNegotiate(xid, ses); |
| 3772 | if (rc == -EAGAIN) |
| 3773 | rc = -EHOSTDOWN; |
| 3774 | } |
| 3775 | if (rc == 0) { |
| 3776 | spin_lock(&GlobalMid_Lock); |
Jeff Layton | 7fdbaa1 | 2011-06-10 16:14:57 -0400 | [diff] [blame] | 3777 | if (server->tcpStatus == CifsNeedNegotiate) |
Jeff Layton | 198b568 | 2010-04-24 07:57:48 -0400 | [diff] [blame] | 3778 | server->tcpStatus = CifsGood; |
| 3779 | else |
| 3780 | rc = -EHOSTDOWN; |
| 3781 | spin_unlock(&GlobalMid_Lock); |
| 3782 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3783 | } |
Steve French | 26b994f | 2008-08-06 05:11:33 +0000 | [diff] [blame] | 3784 | |
Jeff Layton | 198b568 | 2010-04-24 07:57:48 -0400 | [diff] [blame] | 3785 | return rc; |
| 3786 | } |
Steve French | 26b994f | 2008-08-06 05:11:33 +0000 | [diff] [blame] | 3787 | |
Jeff Layton | 198b568 | 2010-04-24 07:57:48 -0400 | [diff] [blame] | 3788 | |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 3789 | int cifs_setup_session(unsigned int xid, struct cifs_ses *ses, |
Jeff Layton | 198b568 | 2010-04-24 07:57:48 -0400 | [diff] [blame] | 3790 | struct nls_table *nls_info) |
| 3791 | { |
| 3792 | int rc = 0; |
| 3793 | struct TCP_Server_Info *server = ses->server; |
| 3794 | |
| 3795 | ses->flags = 0; |
| 3796 | ses->capabilities = server->capabilities; |
Steve French | 26b994f | 2008-08-06 05:11:33 +0000 | [diff] [blame] | 3797 | if (linuxExtEnabled == 0) |
Jeff Layton | 198b568 | 2010-04-24 07:57:48 -0400 | [diff] [blame] | 3798 | ses->capabilities &= (~CAP_UNIX); |
Steve French | 20418ac | 2009-04-30 16:13:32 +0000 | [diff] [blame] | 3799 | |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 3800 | cFYI(1, "Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d", |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 3801 | server->sec_mode, server->capabilities, server->timeAdj); |
Jeff Layton | cb7691b | 2008-08-18 15:41:05 -0400 | [diff] [blame] | 3802 | |
Jeff Layton | 198b568 | 2010-04-24 07:57:48 -0400 | [diff] [blame] | 3803 | rc = CIFS_SessSetup(xid, ses, nls_info); |
Steve French | 26b994f | 2008-08-06 05:11:33 +0000 | [diff] [blame] | 3804 | if (rc) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 3805 | cERROR(1, "Send error in SessSetup = %d", rc); |
Steve French | 26b994f | 2008-08-06 05:11:33 +0000 | [diff] [blame] | 3806 | } else { |
Shirish Pargaonkar | 5d0d288 | 2010-10-13 18:15:00 -0500 | [diff] [blame] | 3807 | mutex_lock(&ses->server->srv_mutex); |
| 3808 | if (!server->session_estab) { |
Shirish Pargaonkar | 21e7339 | 2010-10-21 06:42:55 -0500 | [diff] [blame] | 3809 | server->session_key.response = ses->auth_key.response; |
Shirish Pargaonkar | 5d0d288 | 2010-10-13 18:15:00 -0500 | [diff] [blame] | 3810 | server->session_key.len = ses->auth_key.len; |
Shirish Pargaonkar | 21e7339 | 2010-10-21 06:42:55 -0500 | [diff] [blame] | 3811 | server->sequence_number = 0x2; |
| 3812 | server->session_estab = true; |
| 3813 | ses->auth_key.response = NULL; |
Shirish Pargaonkar | 5d0d288 | 2010-10-13 18:15:00 -0500 | [diff] [blame] | 3814 | } |
| 3815 | mutex_unlock(&server->srv_mutex); |
| 3816 | |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 3817 | cFYI(1, "CIFS Session Established successfully"); |
Steve French | 20418ac | 2009-04-30 16:13:32 +0000 | [diff] [blame] | 3818 | spin_lock(&GlobalMid_Lock); |
Jeff Layton | 198b568 | 2010-04-24 07:57:48 -0400 | [diff] [blame] | 3819 | ses->status = CifsGood; |
| 3820 | ses->need_reconnect = false; |
Steve French | 20418ac | 2009-04-30 16:13:32 +0000 | [diff] [blame] | 3821 | spin_unlock(&GlobalMid_Lock); |
Steve French | 26b994f | 2008-08-06 05:11:33 +0000 | [diff] [blame] | 3822 | } |
| 3823 | |
Shirish Pargaonkar | 21e7339 | 2010-10-21 06:42:55 -0500 | [diff] [blame] | 3824 | kfree(ses->auth_key.response); |
| 3825 | ses->auth_key.response = NULL; |
| 3826 | ses->auth_key.len = 0; |
Shirish Pargaonkar | d3686d5 | 2010-10-28 09:53:07 -0500 | [diff] [blame] | 3827 | kfree(ses->ntlmssp); |
| 3828 | ses->ntlmssp = NULL; |
Shirish Pargaonkar | 21e7339 | 2010-10-21 06:42:55 -0500 | [diff] [blame] | 3829 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3830 | return rc; |
| 3831 | } |
| 3832 | |
Jeff Layton | 8a8798a | 2012-01-17 16:09:15 -0500 | [diff] [blame] | 3833 | static int |
| 3834 | cifs_set_vol_auth(struct smb_vol *vol, struct cifs_ses *ses) |
| 3835 | { |
| 3836 | switch (ses->server->secType) { |
| 3837 | case Kerberos: |
| 3838 | vol->secFlg = CIFSSEC_MUST_KRB5; |
| 3839 | return 0; |
| 3840 | case NTLMv2: |
| 3841 | vol->secFlg = CIFSSEC_MUST_NTLMV2; |
| 3842 | break; |
| 3843 | case NTLM: |
| 3844 | vol->secFlg = CIFSSEC_MUST_NTLM; |
| 3845 | break; |
| 3846 | case RawNTLMSSP: |
| 3847 | vol->secFlg = CIFSSEC_MUST_NTLMSSP; |
| 3848 | break; |
| 3849 | case LANMAN: |
| 3850 | vol->secFlg = CIFSSEC_MUST_LANMAN; |
| 3851 | break; |
| 3852 | } |
| 3853 | |
| 3854 | return cifs_set_cifscreds(vol, ses); |
| 3855 | } |
| 3856 | |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 3857 | static struct cifs_tcon * |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 3858 | cifs_construct_tcon(struct cifs_sb_info *cifs_sb, uid_t fsuid) |
| 3859 | { |
Jeff Layton | 8a8798a | 2012-01-17 16:09:15 -0500 | [diff] [blame] | 3860 | int rc; |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 3861 | struct cifs_tcon *master_tcon = cifs_sb_master_tcon(cifs_sb); |
| 3862 | struct cifs_ses *ses; |
| 3863 | struct cifs_tcon *tcon = NULL; |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 3864 | struct smb_vol *vol_info; |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 3865 | |
| 3866 | vol_info = kzalloc(sizeof(*vol_info), GFP_KERNEL); |
Dan Carpenter | 803ab97 | 2012-01-24 11:39:22 +0300 | [diff] [blame] | 3867 | if (vol_info == NULL) |
| 3868 | return ERR_PTR(-ENOMEM); |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 3869 | |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 3870 | vol_info->local_nls = cifs_sb->local_nls; |
| 3871 | vol_info->linux_uid = fsuid; |
| 3872 | vol_info->cred_uid = fsuid; |
| 3873 | vol_info->UNC = master_tcon->treeName; |
| 3874 | vol_info->retry = master_tcon->retry; |
| 3875 | vol_info->nocase = master_tcon->nocase; |
| 3876 | vol_info->local_lease = master_tcon->local_lease; |
| 3877 | vol_info->no_linux_ext = !master_tcon->unix_ext; |
| 3878 | |
Jeff Layton | 8a8798a | 2012-01-17 16:09:15 -0500 | [diff] [blame] | 3879 | rc = cifs_set_vol_auth(vol_info, master_tcon->ses); |
| 3880 | if (rc) { |
| 3881 | tcon = ERR_PTR(rc); |
| 3882 | goto out; |
| 3883 | } |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 3884 | |
| 3885 | /* get a reference for the same TCP session */ |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 3886 | spin_lock(&cifs_tcp_ses_lock); |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 3887 | ++master_tcon->ses->server->srv_count; |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 3888 | spin_unlock(&cifs_tcp_ses_lock); |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 3889 | |
| 3890 | ses = cifs_get_smb_ses(master_tcon->ses->server, vol_info); |
| 3891 | if (IS_ERR(ses)) { |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 3892 | tcon = (struct cifs_tcon *)ses; |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 3893 | cifs_put_tcp_session(master_tcon->ses->server); |
| 3894 | goto out; |
| 3895 | } |
| 3896 | |
| 3897 | tcon = cifs_get_tcon(ses, vol_info); |
| 3898 | if (IS_ERR(tcon)) { |
| 3899 | cifs_put_smb_ses(ses); |
| 3900 | goto out; |
| 3901 | } |
| 3902 | |
| 3903 | if (ses->capabilities & CAP_UNIX) |
| 3904 | reset_cifs_unix_caps(0, tcon, NULL, vol_info); |
| 3905 | out: |
Jeff Layton | 8a8798a | 2012-01-17 16:09:15 -0500 | [diff] [blame] | 3906 | kfree(vol_info->username); |
| 3907 | kfree(vol_info->password); |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 3908 | kfree(vol_info); |
| 3909 | |
| 3910 | return tcon; |
| 3911 | } |
| 3912 | |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 3913 | struct cifs_tcon * |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 3914 | cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb) |
| 3915 | { |
| 3916 | return tlink_tcon(cifs_sb_master_tlink(cifs_sb)); |
| 3917 | } |
| 3918 | |
| 3919 | static int |
| 3920 | cifs_sb_tcon_pending_wait(void *unused) |
| 3921 | { |
| 3922 | schedule(); |
| 3923 | return signal_pending(current) ? -ERESTARTSYS : 0; |
| 3924 | } |
| 3925 | |
Jeff Layton | b647c35 | 2010-10-28 11:16:44 -0400 | [diff] [blame] | 3926 | /* find and return a tlink with given uid */ |
| 3927 | static struct tcon_link * |
| 3928 | tlink_rb_search(struct rb_root *root, uid_t uid) |
| 3929 | { |
| 3930 | struct rb_node *node = root->rb_node; |
| 3931 | struct tcon_link *tlink; |
| 3932 | |
| 3933 | while (node) { |
| 3934 | tlink = rb_entry(node, struct tcon_link, tl_rbnode); |
| 3935 | |
| 3936 | if (tlink->tl_uid > uid) |
| 3937 | node = node->rb_left; |
| 3938 | else if (tlink->tl_uid < uid) |
| 3939 | node = node->rb_right; |
| 3940 | else |
| 3941 | return tlink; |
| 3942 | } |
| 3943 | return NULL; |
| 3944 | } |
| 3945 | |
| 3946 | /* insert a tcon_link into the tree */ |
| 3947 | static void |
| 3948 | tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink) |
| 3949 | { |
| 3950 | struct rb_node **new = &(root->rb_node), *parent = NULL; |
| 3951 | struct tcon_link *tlink; |
| 3952 | |
| 3953 | while (*new) { |
| 3954 | tlink = rb_entry(*new, struct tcon_link, tl_rbnode); |
| 3955 | parent = *new; |
| 3956 | |
| 3957 | if (tlink->tl_uid > new_tlink->tl_uid) |
| 3958 | new = &((*new)->rb_left); |
| 3959 | else |
| 3960 | new = &((*new)->rb_right); |
| 3961 | } |
| 3962 | |
| 3963 | rb_link_node(&new_tlink->tl_rbnode, parent, new); |
| 3964 | rb_insert_color(&new_tlink->tl_rbnode, root); |
| 3965 | } |
| 3966 | |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 3967 | /* |
| 3968 | * Find or construct an appropriate tcon given a cifs_sb and the fsuid of the |
| 3969 | * current task. |
| 3970 | * |
| 3971 | * If the superblock doesn't refer to a multiuser mount, then just return |
| 3972 | * the master tcon for the mount. |
| 3973 | * |
Suresh Jayaraman | 6ef933a | 2010-11-03 10:53:49 +0530 | [diff] [blame] | 3974 | * First, search the rbtree for an existing tcon for this fsuid. If one |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 3975 | * exists, then check to see if it's pending construction. If it is then wait |
| 3976 | * for construction to complete. Once it's no longer pending, check to see if |
| 3977 | * it failed and either return an error or retry construction, depending on |
| 3978 | * the timeout. |
| 3979 | * |
| 3980 | * If one doesn't exist then insert a new tcon_link struct into the tree and |
| 3981 | * try to construct a new one. |
| 3982 | */ |
| 3983 | struct tcon_link * |
| 3984 | cifs_sb_tlink(struct cifs_sb_info *cifs_sb) |
| 3985 | { |
| 3986 | int ret; |
Jeff Layton | b647c35 | 2010-10-28 11:16:44 -0400 | [diff] [blame] | 3987 | uid_t fsuid = current_fsuid(); |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 3988 | struct tcon_link *tlink, *newtlink; |
| 3989 | |
| 3990 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)) |
| 3991 | return cifs_get_tlink(cifs_sb_master_tlink(cifs_sb)); |
| 3992 | |
| 3993 | spin_lock(&cifs_sb->tlink_tree_lock); |
Jeff Layton | b647c35 | 2010-10-28 11:16:44 -0400 | [diff] [blame] | 3994 | tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid); |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 3995 | if (tlink) |
| 3996 | cifs_get_tlink(tlink); |
| 3997 | spin_unlock(&cifs_sb->tlink_tree_lock); |
| 3998 | |
| 3999 | if (tlink == NULL) { |
| 4000 | newtlink = kzalloc(sizeof(*tlink), GFP_KERNEL); |
| 4001 | if (newtlink == NULL) |
| 4002 | return ERR_PTR(-ENOMEM); |
Jeff Layton | b647c35 | 2010-10-28 11:16:44 -0400 | [diff] [blame] | 4003 | newtlink->tl_uid = fsuid; |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 4004 | newtlink->tl_tcon = ERR_PTR(-EACCES); |
| 4005 | set_bit(TCON_LINK_PENDING, &newtlink->tl_flags); |
| 4006 | set_bit(TCON_LINK_IN_TREE, &newtlink->tl_flags); |
| 4007 | cifs_get_tlink(newtlink); |
| 4008 | |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 4009 | spin_lock(&cifs_sb->tlink_tree_lock); |
| 4010 | /* was one inserted after previous search? */ |
Jeff Layton | b647c35 | 2010-10-28 11:16:44 -0400 | [diff] [blame] | 4011 | tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid); |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 4012 | if (tlink) { |
| 4013 | cifs_get_tlink(tlink); |
| 4014 | spin_unlock(&cifs_sb->tlink_tree_lock); |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 4015 | kfree(newtlink); |
| 4016 | goto wait_for_construction; |
| 4017 | } |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 4018 | tlink = newtlink; |
Jeff Layton | b647c35 | 2010-10-28 11:16:44 -0400 | [diff] [blame] | 4019 | tlink_rb_insert(&cifs_sb->tlink_tree, tlink); |
| 4020 | spin_unlock(&cifs_sb->tlink_tree_lock); |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 4021 | } else { |
| 4022 | wait_for_construction: |
| 4023 | ret = wait_on_bit(&tlink->tl_flags, TCON_LINK_PENDING, |
| 4024 | cifs_sb_tcon_pending_wait, |
| 4025 | TASK_INTERRUPTIBLE); |
| 4026 | if (ret) { |
| 4027 | cifs_put_tlink(tlink); |
| 4028 | return ERR_PTR(ret); |
| 4029 | } |
| 4030 | |
| 4031 | /* if it's good, return it */ |
| 4032 | if (!IS_ERR(tlink->tl_tcon)) |
| 4033 | return tlink; |
| 4034 | |
| 4035 | /* return error if we tried this already recently */ |
| 4036 | if (time_before(jiffies, tlink->tl_time + TLINK_ERROR_EXPIRE)) { |
| 4037 | cifs_put_tlink(tlink); |
| 4038 | return ERR_PTR(-EACCES); |
| 4039 | } |
| 4040 | |
| 4041 | if (test_and_set_bit(TCON_LINK_PENDING, &tlink->tl_flags)) |
| 4042 | goto wait_for_construction; |
| 4043 | } |
| 4044 | |
| 4045 | tlink->tl_tcon = cifs_construct_tcon(cifs_sb, fsuid); |
| 4046 | clear_bit(TCON_LINK_PENDING, &tlink->tl_flags); |
| 4047 | wake_up_bit(&tlink->tl_flags, TCON_LINK_PENDING); |
| 4048 | |
| 4049 | if (IS_ERR(tlink->tl_tcon)) { |
| 4050 | cifs_put_tlink(tlink); |
| 4051 | return ERR_PTR(-EACCES); |
| 4052 | } |
| 4053 | |
| 4054 | return tlink; |
| 4055 | } |
Jeff Layton | 2de970f | 2010-10-06 19:51:12 -0400 | [diff] [blame] | 4056 | |
| 4057 | /* |
| 4058 | * periodic workqueue job that scans tcon_tree for a superblock and closes |
| 4059 | * out tcons. |
| 4060 | */ |
| 4061 | static void |
| 4062 | cifs_prune_tlinks(struct work_struct *work) |
| 4063 | { |
| 4064 | struct cifs_sb_info *cifs_sb = container_of(work, struct cifs_sb_info, |
| 4065 | prune_tlinks.work); |
Jeff Layton | b647c35 | 2010-10-28 11:16:44 -0400 | [diff] [blame] | 4066 | struct rb_root *root = &cifs_sb->tlink_tree; |
| 4067 | struct rb_node *node = rb_first(root); |
| 4068 | struct rb_node *tmp; |
| 4069 | struct tcon_link *tlink; |
Jeff Layton | 2de970f | 2010-10-06 19:51:12 -0400 | [diff] [blame] | 4070 | |
Jeff Layton | b647c35 | 2010-10-28 11:16:44 -0400 | [diff] [blame] | 4071 | /* |
| 4072 | * Because we drop the spinlock in the loop in order to put the tlink |
| 4073 | * it's not guarded against removal of links from the tree. The only |
| 4074 | * places that remove entries from the tree are this function and |
| 4075 | * umounts. Because this function is non-reentrant and is canceled |
| 4076 | * before umount can proceed, this is safe. |
| 4077 | */ |
| 4078 | spin_lock(&cifs_sb->tlink_tree_lock); |
| 4079 | node = rb_first(root); |
| 4080 | while (node != NULL) { |
| 4081 | tmp = node; |
| 4082 | node = rb_next(tmp); |
| 4083 | tlink = rb_entry(tmp, struct tcon_link, tl_rbnode); |
| 4084 | |
| 4085 | if (test_bit(TCON_LINK_MASTER, &tlink->tl_flags) || |
| 4086 | atomic_read(&tlink->tl_count) != 0 || |
| 4087 | time_after(tlink->tl_time + TLINK_IDLE_EXPIRE, jiffies)) |
| 4088 | continue; |
| 4089 | |
| 4090 | cifs_get_tlink(tlink); |
| 4091 | clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); |
| 4092 | rb_erase(tmp, root); |
| 4093 | |
Jeff Layton | 2de970f | 2010-10-06 19:51:12 -0400 | [diff] [blame] | 4094 | spin_unlock(&cifs_sb->tlink_tree_lock); |
Jeff Layton | b647c35 | 2010-10-28 11:16:44 -0400 | [diff] [blame] | 4095 | cifs_put_tlink(tlink); |
| 4096 | spin_lock(&cifs_sb->tlink_tree_lock); |
| 4097 | } |
| 4098 | spin_unlock(&cifs_sb->tlink_tree_lock); |
Jeff Layton | 2de970f | 2010-10-06 19:51:12 -0400 | [diff] [blame] | 4099 | |
| 4100 | queue_delayed_work(system_nrt_wq, &cifs_sb->prune_tlinks, |
| 4101 | TLINK_IDLE_EXPIRE); |
| 4102 | } |