Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * fs/cifs/cifsfs.c |
| 3 | * |
Steve French | 2b280fa | 2008-05-17 03:12:45 +0000 | [diff] [blame] | 4 | * Copyright (C) International Business Machines Corp., 2002,2008 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | * Author(s): Steve French (sfrench@us.ibm.com) |
| 6 | * |
| 7 | * Common Internet FileSystem (CIFS) client |
| 8 | * |
| 9 | * This library is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU Lesser General Public License as published |
| 11 | * by the Free Software Foundation; either version 2.1 of the License, or |
| 12 | * (at your option) any later version. |
| 13 | * |
| 14 | * This library is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See |
| 17 | * the GNU Lesser General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU Lesser General Public License |
| 20 | * along with this library; if not, write to the Free Software |
| 21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 22 | */ |
| 23 | |
| 24 | /* Note that BB means BUGBUG (ie something to fix eventually) */ |
| 25 | |
| 26 | #include <linux/module.h> |
| 27 | #include <linux/fs.h> |
| 28 | #include <linux/mount.h> |
| 29 | #include <linux/slab.h> |
| 30 | #include <linux/init.h> |
| 31 | #include <linux/list.h> |
| 32 | #include <linux/seq_file.h> |
| 33 | #include <linux/vfs.h> |
| 34 | #include <linux/mempool.h> |
Steve French | 6ab16d2 | 2005-11-29 20:55:11 -0800 | [diff] [blame] | 35 | #include <linux/delay.h> |
Steve French | 45af7a0 | 2006-04-21 22:52:25 +0000 | [diff] [blame] | 36 | #include <linux/kthread.h> |
Nigel Cunningham | 7dfb710 | 2006-12-06 20:34:23 -0800 | [diff] [blame] | 37 | #include <linux/freezer.h> |
Al Viro | fec11dd | 2011-07-18 13:50:40 -0400 | [diff] [blame] | 38 | #include <linux/namei.h> |
Pavel Shilovsky | b8c32db | 2012-09-19 06:22:44 -0700 | [diff] [blame] | 39 | #include <linux/random.h> |
Andrew Lunn | c6e970a | 2017-03-28 23:45:06 +0200 | [diff] [blame] | 40 | #include <linux/uuid.h> |
Andreas Gruenbacher | a9ae008 | 2016-04-22 12:11:38 +0200 | [diff] [blame] | 41 | #include <linux/xattr.h> |
Ben Greear | 3eb9a88 | 2010-09-01 17:06:02 -0700 | [diff] [blame] | 42 | #include <net/ipv6.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | #include "cifsfs.h" |
| 44 | #include "cifspdu.h" |
| 45 | #define DECLARE_GLOBALS_HERE |
| 46 | #include "cifsglob.h" |
| 47 | #include "cifsproto.h" |
| 48 | #include "cifs_debug.h" |
| 49 | #include "cifs_fs_sb.h" |
| 50 | #include <linux/mm.h> |
Jeff Layton | 84a15b9 | 2007-11-03 05:02:24 +0000 | [diff] [blame] | 51 | #include <linux/key-type.h> |
Jeff Layton | e545937 | 2007-11-03 05:11:06 +0000 | [diff] [blame] | 52 | #include "cifs_spnego.h" |
Suresh Jayaraman | f579cf3 | 2010-07-05 18:11:50 +0530 | [diff] [blame] | 53 | #include "fscache.h" |
Pavel Shilovsky | 3792c17 | 2012-01-12 22:40:50 +0400 | [diff] [blame] | 54 | #include "smb2pdu.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | int cifsFYI = 0; |
Kees Cook | 1404297 | 2016-03-17 14:22:54 -0700 | [diff] [blame] | 57 | bool traceSMB; |
Steve French | e750473 | 2011-10-12 17:47:03 -0500 | [diff] [blame] | 58 | bool enable_oplocks = true; |
Kees Cook | 1404297 | 2016-03-17 14:22:54 -0700 | [diff] [blame] | 59 | bool linuxExtEnabled = true; |
| 60 | bool lookupCacheEnabled = true; |
Jeff Layton | 04912d6 | 2010-04-24 07:57:45 -0400 | [diff] [blame] | 61 | unsigned int global_secflags = CIFSSEC_DEF; |
Steve French | 3979877 | 2006-05-31 22:40:51 +0000 | [diff] [blame] | 62 | /* unsigned int ntlmv2_support = 0; */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | unsigned int sign_CIFS_PDUs = 1; |
Josef 'Jeff' Sipek | ee9b6d6 | 2007-02-12 00:55:41 -0800 | [diff] [blame] | 64 | static const struct super_operations cifs_super_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | unsigned int CIFSMaxBufSize = CIFS_MAX_MSGSIZE; |
Germano Percossi | cb978ac | 2016-09-30 21:25:24 -0500 | [diff] [blame] | 66 | module_param(CIFSMaxBufSize, uint, 0444); |
Steve French | 63135e0 | 2007-07-17 17:34:02 +0000 | [diff] [blame] | 67 | MODULE_PARM_DESC(CIFSMaxBufSize, "Network buffer size (not including header). " |
| 68 | "Default: 16384 Range: 8192 to 130048"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | unsigned int cifs_min_rcv = CIFS_MIN_RCV_POOL; |
Germano Percossi | cb978ac | 2016-09-30 21:25:24 -0500 | [diff] [blame] | 70 | module_param(cifs_min_rcv, uint, 0444); |
Steve French | 63135e0 | 2007-07-17 17:34:02 +0000 | [diff] [blame] | 71 | MODULE_PARM_DESC(cifs_min_rcv, "Network buffers in pool. Default: 4 Range: " |
| 72 | "1 to 64"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | unsigned int cifs_min_small = 30; |
Germano Percossi | cb978ac | 2016-09-30 21:25:24 -0500 | [diff] [blame] | 74 | module_param(cifs_min_small, uint, 0444); |
Steve French | 63135e0 | 2007-07-17 17:34:02 +0000 | [diff] [blame] | 75 | MODULE_PARM_DESC(cifs_min_small, "Small network buffers in pool. Default: 30 " |
| 76 | "Range: 2 to 256"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | unsigned int cifs_max_pending = CIFS_MAX_REQ; |
Jeff Layton | 60654ce | 2012-11-25 08:00:34 -0500 | [diff] [blame] | 78 | module_param(cifs_max_pending, uint, 0444); |
Steve French | 63135e0 | 2007-07-17 17:34:02 +0000 | [diff] [blame] | 79 | MODULE_PARM_DESC(cifs_max_pending, "Simultaneous requests to server. " |
Pavel Shilovsky | 10b9b98 | 2012-03-20 12:55:09 +0300 | [diff] [blame] | 80 | "Default: 32767 Range: 2 to 32767."); |
Steve French | e750473 | 2011-10-12 17:47:03 -0500 | [diff] [blame] | 81 | module_param(enable_oplocks, bool, 0644); |
Jeff Layton | 60654ce | 2012-11-25 08:00:34 -0500 | [diff] [blame] | 82 | MODULE_PARM_DESC(enable_oplocks, "Enable or disable oplocks. Default: y/Y/1"); |
Steve French | e750473 | 2011-10-12 17:47:03 -0500 | [diff] [blame] | 83 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | extern mempool_t *cifs_sm_req_poolp; |
| 85 | extern mempool_t *cifs_req_poolp; |
| 86 | extern mempool_t *cifs_mid_poolp; |
| 87 | |
Jeff Layton | da472fc | 2012-03-23 14:40:53 -0400 | [diff] [blame] | 88 | struct workqueue_struct *cifsiod_wq; |
Rabin Vincent | 3998e6b | 2017-05-03 17:54:01 +0200 | [diff] [blame] | 89 | struct workqueue_struct *cifsoplockd_wq; |
Jeff Layton | 3d22462 | 2016-05-24 06:27:44 -0400 | [diff] [blame] | 90 | __u32 cifs_lock_secret; |
Jeff Layton | da472fc | 2012-03-23 14:40:53 -0400 | [diff] [blame] | 91 | |
Mateusz Guzik | 24261fc | 2013-03-08 16:30:03 +0100 | [diff] [blame] | 92 | /* |
| 93 | * Bumps refcount for cifs super block. |
| 94 | * Note that it should be only called if a referece to VFS super block is |
| 95 | * already held, e.g. in open-type syscalls context. Otherwise it can race with |
| 96 | * atomic_dec_and_test in deactivate_locked_super. |
| 97 | */ |
| 98 | void |
| 99 | cifs_sb_active(struct super_block *sb) |
| 100 | { |
| 101 | struct cifs_sb_info *server = CIFS_SB(sb); |
| 102 | |
| 103 | if (atomic_inc_return(&server->active) == 1) |
| 104 | atomic_inc(&sb->s_active); |
| 105 | } |
| 106 | |
| 107 | void |
| 108 | cifs_sb_deactive(struct super_block *sb) |
| 109 | { |
| 110 | struct cifs_sb_info *server = CIFS_SB(sb); |
| 111 | |
| 112 | if (atomic_dec_and_test(&server->active)) |
| 113 | deactivate_super(sb); |
| 114 | } |
| 115 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 116 | static int |
Al Viro | 97d1152 | 2011-06-17 09:29:57 -0400 | [diff] [blame] | 117 | cifs_read_super(struct super_block *sb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | { |
| 119 | struct inode *inode; |
Pavel Shilovsky | b2e5cd3 | 2011-05-25 13:35:34 +0400 | [diff] [blame] | 120 | struct cifs_sb_info *cifs_sb; |
Jan Klos | 2f6c947 | 2013-10-06 21:08:20 +0200 | [diff] [blame] | 121 | struct cifs_tcon *tcon; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | int rc = 0; |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 123 | |
Pavel Shilovsky | b2e5cd3 | 2011-05-25 13:35:34 +0400 | [diff] [blame] | 124 | cifs_sb = CIFS_SB(sb); |
Jan Klos | 2f6c947 | 2013-10-06 21:08:20 +0200 | [diff] [blame] | 125 | tcon = cifs_sb_master_tcon(cifs_sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | |
Al Viro | 2c6292a | 2011-06-17 09:05:48 -0400 | [diff] [blame] | 127 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIXACL) |
| 128 | sb->s_flags |= MS_POSIXACL; |
| 129 | |
Jan Klos | 2f6c947 | 2013-10-06 21:08:20 +0200 | [diff] [blame] | 130 | if (tcon->ses->capabilities & tcon->ses->server->vals->cap_large_files) |
Al Viro | 2c6292a | 2011-06-17 09:05:48 -0400 | [diff] [blame] | 131 | sb->s_maxbytes = MAX_LFS_FILESIZE; |
| 132 | else |
| 133 | sb->s_maxbytes = MAX_NON_LFS; |
| 134 | |
| 135 | /* BB FIXME fix time_gran to be larger for LANMAN sessions */ |
| 136 | sb->s_time_gran = 100; |
| 137 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | sb->s_magic = CIFS_MAGIC_NUMBER; |
| 139 | sb->s_op = &cifs_super_ops; |
Andreas Gruenbacher | a9ae008 | 2016-04-22 12:11:38 +0200 | [diff] [blame] | 140 | sb->s_xattr = cifs_xattr_handlers; |
Jan Kara | 851ea08 | 2017-04-12 12:24:34 +0200 | [diff] [blame] | 141 | rc = super_setup_bdi(sb); |
| 142 | if (rc) |
| 143 | goto out_no_root; |
| 144 | /* tune readahead according to rsize */ |
| 145 | sb->s_bdi->ra_pages = cifs_sb->rsize / PAGE_SIZE; |
| 146 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | sb->s_blocksize = CIFS_MAX_MSGSIZE; |
| 148 | sb->s_blocksize_bits = 14; /* default 2**14 = CIFS_MAX_MSGSIZE */ |
Shirish Pargaonkar | 9b6763e | 2011-02-21 23:56:59 -0600 | [diff] [blame] | 149 | inode = cifs_root_iget(sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | |
David Howells | ce634ab | 2008-02-07 00:15:33 -0800 | [diff] [blame] | 151 | if (IS_ERR(inode)) { |
| 152 | rc = PTR_ERR(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | goto out_no_root; |
| 154 | } |
| 155 | |
Jan Klos | 2f6c947 | 2013-10-06 21:08:20 +0200 | [diff] [blame] | 156 | if (tcon->nocase) |
Jeff Layton | 66ffd11 | 2013-07-30 11:38:44 -0400 | [diff] [blame] | 157 | sb->s_d_op = &cifs_ci_dentry_ops; |
| 158 | else |
| 159 | sb->s_d_op = &cifs_dentry_ops; |
| 160 | |
Al Viro | 48fde70 | 2012-01-08 22:15:13 -0500 | [diff] [blame] | 161 | sb->s_root = d_make_root(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | if (!sb->s_root) { |
| 163 | rc = -ENOMEM; |
| 164 | goto out_no_root; |
| 165 | } |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 166 | |
Paul Bolle | f3a6a60 | 2011-10-12 14:14:04 +0200 | [diff] [blame] | 167 | #ifdef CONFIG_CIFS_NFSD_EXPORT |
Steve French | 7521a3c | 2007-07-11 18:30:34 +0000 | [diff] [blame] | 168 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 169 | cifs_dbg(FYI, "export ops supported\n"); |
Steve French | 7521a3c | 2007-07-11 18:30:34 +0000 | [diff] [blame] | 170 | sb->s_export_op = &cifs_export_ops; |
| 171 | } |
Paul Bolle | f3a6a60 | 2011-10-12 14:14:04 +0200 | [diff] [blame] | 172 | #endif /* CONFIG_CIFS_NFSD_EXPORT */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | |
| 174 | return 0; |
| 175 | |
| 176 | out_no_root: |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 177 | cifs_dbg(VFS, "%s: get root inode failed\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | return rc; |
| 179 | } |
| 180 | |
Al Viro | 6d68617 | 2011-06-17 08:34:57 -0400 | [diff] [blame] | 181 | static void cifs_kill_sb(struct super_block *sb) |
| 182 | { |
| 183 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
| 184 | kill_anon_super(sb); |
Al Viro | 98ab494 | 2011-06-17 09:32:10 -0400 | [diff] [blame] | 185 | cifs_umount(cifs_sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | } |
| 187 | |
| 188 | static int |
David Howells | 726c334 | 2006-06-23 02:02:58 -0700 | [diff] [blame] | 189 | cifs_statfs(struct dentry *dentry, struct kstatfs *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | { |
David Howells | 726c334 | 2006-06-23 02:02:58 -0700 | [diff] [blame] | 191 | struct super_block *sb = dentry->d_sb; |
Steve French | 39da984 | 2008-04-28 04:04:34 +0000 | [diff] [blame] | 192 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 193 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
Pavel Shilovsky | 76ec5e3 | 2012-09-18 16:20:33 -0700 | [diff] [blame] | 194 | struct TCP_Server_Info *server = tcon->ses->server; |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 195 | unsigned int xid; |
Pavel Shilovsky | 76ec5e3 | 2012-09-18 16:20:33 -0700 | [diff] [blame] | 196 | int rc = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 197 | |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 198 | xid = get_xid(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | |
Steve French | 39da984 | 2008-04-28 04:04:34 +0000 | [diff] [blame] | 200 | /* |
| 201 | * PATH_MAX may be too long - it would presumably be total path, |
| 202 | * but note that some servers (includinng Samba 3) have a shorter |
| 203 | * maximum path. |
| 204 | * |
| 205 | * Instead could get the real value via SMB_QUERY_FS_ATTRIBUTE_INFO. |
| 206 | */ |
| 207 | buf->f_namelen = PATH_MAX; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | buf->f_files = 0; /* undefined */ |
| 209 | buf->f_ffree = 0; /* unlimited */ |
| 210 | |
Pavel Shilovsky | 76ec5e3 | 2012-09-18 16:20:33 -0700 | [diff] [blame] | 211 | if (server->ops->queryfs) |
| 212 | rc = server->ops->queryfs(xid, tcon, buf); |
Steve French | 39da984 | 2008-04-28 04:04:34 +0000 | [diff] [blame] | 213 | |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 214 | free_xid(xid); |
Steve French | 39da984 | 2008-04-28 04:04:34 +0000 | [diff] [blame] | 215 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 216 | } |
| 217 | |
Steve French | 31742c5 | 2014-08-17 08:38:47 -0500 | [diff] [blame] | 218 | static long cifs_fallocate(struct file *file, int mode, loff_t off, loff_t len) |
| 219 | { |
Al Viro | 7119e22 | 2014-10-22 00:25:12 -0400 | [diff] [blame] | 220 | struct cifs_sb_info *cifs_sb = CIFS_FILE_SB(file); |
Steve French | 31742c5 | 2014-08-17 08:38:47 -0500 | [diff] [blame] | 221 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
| 222 | struct TCP_Server_Info *server = tcon->ses->server; |
| 223 | |
| 224 | if (server->ops->fallocate) |
| 225 | return server->ops->fallocate(file, tcon, mode, off, len); |
| 226 | |
| 227 | return -EOPNOTSUPP; |
| 228 | } |
| 229 | |
Al Viro | 10556cb | 2011-06-20 19:28:19 -0400 | [diff] [blame] | 230 | static int cifs_permission(struct inode *inode, int mask) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | { |
| 232 | struct cifs_sb_info *cifs_sb; |
| 233 | |
| 234 | cifs_sb = CIFS_SB(inode->i_sb); |
| 235 | |
Miklos Szeredi | f696a36 | 2008-07-31 13:41:58 +0200 | [diff] [blame] | 236 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) { |
| 237 | if ((mask & MAY_EXEC) && !execute_ok(inode)) |
| 238 | return -EACCES; |
| 239 | else |
| 240 | return 0; |
| 241 | } else /* file mode might have been restricted at mount time |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 242 | on the client (above and beyond ACL on servers) for |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | servers which do not support setting and viewing mode bits, |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 244 | so allowing client to check permissions is useful */ |
Al Viro | 2830ba7 | 2011-06-20 19:16:29 -0400 | [diff] [blame] | 245 | return generic_permission(inode, mask); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | } |
| 247 | |
Christoph Lameter | e18b890 | 2006-12-06 20:33:20 -0800 | [diff] [blame] | 248 | static struct kmem_cache *cifs_inode_cachep; |
| 249 | static struct kmem_cache *cifs_req_cachep; |
| 250 | static struct kmem_cache *cifs_mid_cachep; |
Christoph Lameter | e18b890 | 2006-12-06 20:33:20 -0800 | [diff] [blame] | 251 | static struct kmem_cache *cifs_sm_req_cachep; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | mempool_t *cifs_sm_req_poolp; |
| 253 | mempool_t *cifs_req_poolp; |
| 254 | mempool_t *cifs_mid_poolp; |
| 255 | |
| 256 | static struct inode * |
| 257 | cifs_alloc_inode(struct super_block *sb) |
| 258 | { |
| 259 | struct cifsInodeInfo *cifs_inode; |
Christoph Lameter | e94b176 | 2006-12-06 20:33:17 -0800 | [diff] [blame] | 260 | cifs_inode = kmem_cache_alloc(cifs_inode_cachep, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | if (!cifs_inode) |
| 262 | return NULL; |
| 263 | cifs_inode->cifsAttrs = 0x20; /* default */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | cifs_inode->time = 0; |
Pavel Shilovsky | b8c32db | 2012-09-19 06:22:44 -0700 | [diff] [blame] | 265 | /* |
| 266 | * Until the file is open and we have gotten oplock info back from the |
| 267 | * server, can not assume caching of file data or metadata. |
| 268 | */ |
Pavel Shilovsky | c672362 | 2010-11-03 10:58:57 +0300 | [diff] [blame] | 269 | cifs_set_oplock_level(cifs_inode, 0); |
Jeff Layton | aff8d5c | 2014-04-30 09:31:45 -0400 | [diff] [blame] | 270 | cifs_inode->flags = 0; |
Sachin Prabhu | c11f1df | 2014-03-11 16:11:47 +0000 | [diff] [blame] | 271 | spin_lock_init(&cifs_inode->writers_lock); |
| 272 | cifs_inode->writers = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */ |
Jeff Layton | fbec9ab | 2009-04-03 13:44:00 -0400 | [diff] [blame] | 274 | cifs_inode->server_eof = 0; |
Jeff Layton | 20054bd | 2011-01-07 11:30:27 -0500 | [diff] [blame] | 275 | cifs_inode->uniqueid = 0; |
| 276 | cifs_inode->createtime = 0; |
Pavel Shilovsky | 42873b0 | 2013-09-05 21:30:16 +0400 | [diff] [blame] | 277 | cifs_inode->epoch = 0; |
Steve French | fa70b87 | 2016-09-22 00:39:34 -0500 | [diff] [blame] | 278 | generate_random_uuid(cifs_inode->lease_key); |
Steve French | 2a38e12 | 2017-07-08 18:48:15 -0500 | [diff] [blame] | 279 | |
Pavel Shilovsky | b8c32db | 2012-09-19 06:22:44 -0700 | [diff] [blame] | 280 | /* |
| 281 | * Can not set i_flags here - they get immediately overwritten to zero |
| 282 | * by the VFS. |
| 283 | */ |
| 284 | /* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME; */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | INIT_LIST_HEAD(&cifs_inode->openFileList); |
Pavel Shilovsky | f45d341 | 2012-09-19 06:22:43 -0700 | [diff] [blame] | 286 | INIT_LIST_HEAD(&cifs_inode->llist); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | return &cifs_inode->vfs_inode; |
| 288 | } |
| 289 | |
Nick Piggin | fa0d7e3d | 2011-01-07 17:49:49 +1100 | [diff] [blame] | 290 | static void cifs_i_callback(struct rcu_head *head) |
| 291 | { |
| 292 | struct inode *inode = container_of(head, struct inode, i_rcu); |
Nick Piggin | fa0d7e3d | 2011-01-07 17:49:49 +1100 | [diff] [blame] | 293 | kmem_cache_free(cifs_inode_cachep, CIFS_I(inode)); |
| 294 | } |
| 295 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 296 | static void |
| 297 | cifs_destroy_inode(struct inode *inode) |
| 298 | { |
Nick Piggin | fa0d7e3d | 2011-01-07 17:49:49 +1100 | [diff] [blame] | 299 | call_rcu(&inode->i_rcu, cifs_i_callback); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | } |
| 301 | |
Jeff Layton | 61f98ff | 2009-06-11 10:27:32 -0400 | [diff] [blame] | 302 | static void |
Al Viro | b57922d | 2010-06-07 14:34:48 -0400 | [diff] [blame] | 303 | cifs_evict_inode(struct inode *inode) |
Suresh Jayaraman | 9451a9a | 2010-07-05 18:12:45 +0530 | [diff] [blame] | 304 | { |
Johannes Weiner | 91b0abe | 2014-04-03 14:47:49 -0700 | [diff] [blame] | 305 | truncate_inode_pages_final(&inode->i_data); |
Jan Kara | dbd5768 | 2012-05-03 14:48:02 +0200 | [diff] [blame] | 306 | clear_inode(inode); |
Suresh Jayaraman | 9451a9a | 2010-07-05 18:12:45 +0530 | [diff] [blame] | 307 | cifs_fscache_release_inode_cookie(inode); |
| 308 | } |
| 309 | |
| 310 | static void |
Jeff Layton | 61f98ff | 2009-06-11 10:27:32 -0400 | [diff] [blame] | 311 | cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server) |
| 312 | { |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 313 | struct sockaddr_in *sa = (struct sockaddr_in *) &server->dstaddr; |
| 314 | struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) &server->dstaddr; |
| 315 | |
Fabian Frederick | 571d597 | 2014-05-13 18:04:17 +0200 | [diff] [blame] | 316 | seq_puts(s, ",addr="); |
Jeff Layton | 61f98ff | 2009-06-11 10:27:32 -0400 | [diff] [blame] | 317 | |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 318 | switch (server->dstaddr.ss_family) { |
Jeff Layton | 61f98ff | 2009-06-11 10:27:32 -0400 | [diff] [blame] | 319 | case AF_INET: |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 320 | seq_printf(s, "%pI4", &sa->sin_addr.s_addr); |
Jeff Layton | 61f98ff | 2009-06-11 10:27:32 -0400 | [diff] [blame] | 321 | break; |
| 322 | case AF_INET6: |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 323 | seq_printf(s, "%pI6", &sa6->sin6_addr.s6_addr); |
| 324 | if (sa6->sin6_scope_id) |
| 325 | seq_printf(s, "%%%u", sa6->sin6_scope_id); |
Jeff Layton | 61f98ff | 2009-06-11 10:27:32 -0400 | [diff] [blame] | 326 | break; |
| 327 | default: |
Fabian Frederick | 571d597 | 2014-05-13 18:04:17 +0200 | [diff] [blame] | 328 | seq_puts(s, "(unknown)"); |
Jeff Layton | 61f98ff | 2009-06-11 10:27:32 -0400 | [diff] [blame] | 329 | } |
| 330 | } |
| 331 | |
Jeff Layton | 3e71551 | 2011-06-13 11:50:41 -0400 | [diff] [blame] | 332 | static void |
Jeff Layton | 28e11bd | 2013-05-26 07:01:00 -0400 | [diff] [blame] | 333 | cifs_show_security(struct seq_file *s, struct cifs_ses *ses) |
Jeff Layton | 3e71551 | 2011-06-13 11:50:41 -0400 | [diff] [blame] | 334 | { |
Steve French | eda2116 | 2015-09-11 19:24:19 -0500 | [diff] [blame] | 335 | if (ses->sectype == Unspecified) { |
| 336 | if (ses->user_name == NULL) |
| 337 | seq_puts(s, ",sec=none"); |
Jeff Layton | 28e11bd | 2013-05-26 07:01:00 -0400 | [diff] [blame] | 338 | return; |
Steve French | eda2116 | 2015-09-11 19:24:19 -0500 | [diff] [blame] | 339 | } |
Jeff Layton | 28e11bd | 2013-05-26 07:01:00 -0400 | [diff] [blame] | 340 | |
Fabian Frederick | 571d597 | 2014-05-13 18:04:17 +0200 | [diff] [blame] | 341 | seq_puts(s, ",sec="); |
Jeff Layton | 3e71551 | 2011-06-13 11:50:41 -0400 | [diff] [blame] | 342 | |
Jeff Layton | 28e11bd | 2013-05-26 07:01:00 -0400 | [diff] [blame] | 343 | switch (ses->sectype) { |
Jeff Layton | 3e71551 | 2011-06-13 11:50:41 -0400 | [diff] [blame] | 344 | case LANMAN: |
Fabian Frederick | 571d597 | 2014-05-13 18:04:17 +0200 | [diff] [blame] | 345 | seq_puts(s, "lanman"); |
Jeff Layton | 3e71551 | 2011-06-13 11:50:41 -0400 | [diff] [blame] | 346 | break; |
| 347 | case NTLMv2: |
Fabian Frederick | 571d597 | 2014-05-13 18:04:17 +0200 | [diff] [blame] | 348 | seq_puts(s, "ntlmv2"); |
Jeff Layton | 3e71551 | 2011-06-13 11:50:41 -0400 | [diff] [blame] | 349 | break; |
| 350 | case NTLM: |
Fabian Frederick | 571d597 | 2014-05-13 18:04:17 +0200 | [diff] [blame] | 351 | seq_puts(s, "ntlm"); |
Jeff Layton | 3e71551 | 2011-06-13 11:50:41 -0400 | [diff] [blame] | 352 | break; |
| 353 | case Kerberos: |
Fabian Frederick | 571d597 | 2014-05-13 18:04:17 +0200 | [diff] [blame] | 354 | seq_puts(s, "krb5"); |
Jeff Layton | 3e71551 | 2011-06-13 11:50:41 -0400 | [diff] [blame] | 355 | break; |
| 356 | case RawNTLMSSP: |
Fabian Frederick | 571d597 | 2014-05-13 18:04:17 +0200 | [diff] [blame] | 357 | seq_puts(s, "ntlmssp"); |
Jeff Layton | 3e71551 | 2011-06-13 11:50:41 -0400 | [diff] [blame] | 358 | break; |
| 359 | default: |
| 360 | /* shouldn't ever happen */ |
Fabian Frederick | 571d597 | 2014-05-13 18:04:17 +0200 | [diff] [blame] | 361 | seq_puts(s, "unknown"); |
Jeff Layton | 3e71551 | 2011-06-13 11:50:41 -0400 | [diff] [blame] | 362 | break; |
| 363 | } |
| 364 | |
Jeff Layton | 28e11bd | 2013-05-26 07:01:00 -0400 | [diff] [blame] | 365 | if (ses->sign) |
Fabian Frederick | 571d597 | 2014-05-13 18:04:17 +0200 | [diff] [blame] | 366 | seq_puts(s, "i"); |
Jeff Layton | 3e71551 | 2011-06-13 11:50:41 -0400 | [diff] [blame] | 367 | } |
| 368 | |
Jeff Layton | d06b505 | 2012-05-16 07:53:01 -0400 | [diff] [blame] | 369 | static void |
| 370 | cifs_show_cache_flavor(struct seq_file *s, struct cifs_sb_info *cifs_sb) |
| 371 | { |
Fabian Frederick | 571d597 | 2014-05-13 18:04:17 +0200 | [diff] [blame] | 372 | seq_puts(s, ",cache="); |
Jeff Layton | d06b505 | 2012-05-16 07:53:01 -0400 | [diff] [blame] | 373 | |
| 374 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO) |
Fabian Frederick | 571d597 | 2014-05-13 18:04:17 +0200 | [diff] [blame] | 375 | seq_puts(s, "strict"); |
Jeff Layton | d06b505 | 2012-05-16 07:53:01 -0400 | [diff] [blame] | 376 | else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) |
Fabian Frederick | 571d597 | 2014-05-13 18:04:17 +0200 | [diff] [blame] | 377 | seq_puts(s, "none"); |
Jeff Layton | d06b505 | 2012-05-16 07:53:01 -0400 | [diff] [blame] | 378 | else |
Fabian Frederick | 571d597 | 2014-05-13 18:04:17 +0200 | [diff] [blame] | 379 | seq_puts(s, "loose"); |
Jeff Layton | d06b505 | 2012-05-16 07:53:01 -0400 | [diff] [blame] | 380 | } |
| 381 | |
Jeff Layton | 3ae35cd | 2013-07-30 13:34:40 -0400 | [diff] [blame] | 382 | static void |
| 383 | cifs_show_nls(struct seq_file *s, struct nls_table *cur) |
| 384 | { |
| 385 | struct nls_table *def; |
| 386 | |
| 387 | /* Display iocharset= option if it's not default charset */ |
| 388 | def = load_nls_default(); |
| 389 | if (def != cur) |
| 390 | seq_printf(s, ",iocharset=%s", cur->charset); |
| 391 | unload_nls(def); |
| 392 | } |
| 393 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | /* |
| 395 | * cifs_show_options() is for displaying mount options in /proc/mounts. |
| 396 | * Not all settable options are displayed but most of the important |
| 397 | * ones are. |
| 398 | */ |
| 399 | static int |
Al Viro | 34c80b1 | 2011-12-08 21:32:45 -0500 | [diff] [blame] | 400 | cifs_show_options(struct seq_file *s, struct dentry *root) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | { |
Al Viro | 34c80b1 | 2011-12-08 21:32:45 -0500 | [diff] [blame] | 402 | struct cifs_sb_info *cifs_sb = CIFS_SB(root->d_sb); |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 403 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
Ben Greear | 3eb9a88 | 2010-09-01 17:06:02 -0700 | [diff] [blame] | 404 | struct sockaddr *srcaddr; |
| 405 | srcaddr = (struct sockaddr *)&tcon->ses->server->srcaddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | |
Kees Cook | a068acf | 2015-09-04 15:44:57 -0700 | [diff] [blame] | 407 | seq_show_option(s, "vers", tcon->ses->server->vals->version_string); |
Jeff Layton | 28e11bd | 2013-05-26 07:01:00 -0400 | [diff] [blame] | 408 | cifs_show_security(s, tcon->ses); |
Jeff Layton | d06b505 | 2012-05-16 07:53:01 -0400 | [diff] [blame] | 409 | cifs_show_cache_flavor(s, cifs_sb); |
Jeff Layton | 3e71551 | 2011-06-13 11:50:41 -0400 | [diff] [blame] | 410 | |
Jeff Layton | 29e07c8 | 2010-09-29 19:51:12 -0400 | [diff] [blame] | 411 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER) |
Fabian Frederick | 571d597 | 2014-05-13 18:04:17 +0200 | [diff] [blame] | 412 | seq_puts(s, ",multiuser"); |
Steve French | 8727c8a | 2011-02-25 01:11:56 -0600 | [diff] [blame] | 413 | else if (tcon->ses->user_name) |
Kees Cook | a068acf | 2015-09-04 15:44:57 -0700 | [diff] [blame] | 414 | seq_show_option(s, "username", tcon->ses->user_name); |
Jeff Layton | 29e07c8 | 2010-09-29 19:51:12 -0400 | [diff] [blame] | 415 | |
Jeff Layton | 8616e0f | 2009-06-11 10:27:28 -0400 | [diff] [blame] | 416 | if (tcon->ses->domainName) |
Kees Cook | a068acf | 2015-09-04 15:44:57 -0700 | [diff] [blame] | 417 | seq_show_option(s, "domain", tcon->ses->domainName); |
Jeff Layton | 8616e0f | 2009-06-11 10:27:28 -0400 | [diff] [blame] | 418 | |
Ben Greear | 3eb9a88 | 2010-09-01 17:06:02 -0700 | [diff] [blame] | 419 | if (srcaddr->sa_family != AF_UNSPEC) { |
| 420 | struct sockaddr_in *saddr4; |
| 421 | struct sockaddr_in6 *saddr6; |
| 422 | saddr4 = (struct sockaddr_in *)srcaddr; |
| 423 | saddr6 = (struct sockaddr_in6 *)srcaddr; |
| 424 | if (srcaddr->sa_family == AF_INET6) |
| 425 | seq_printf(s, ",srcaddr=%pI6c", |
| 426 | &saddr6->sin6_addr); |
| 427 | else if (srcaddr->sa_family == AF_INET) |
| 428 | seq_printf(s, ",srcaddr=%pI4", |
| 429 | &saddr4->sin_addr.s_addr); |
| 430 | else |
| 431 | seq_printf(s, ",srcaddr=BAD-AF:%i", |
| 432 | (int)(srcaddr->sa_family)); |
| 433 | } |
| 434 | |
Eric W. Biederman | 1f68233 | 2013-02-06 01:20:20 -0800 | [diff] [blame] | 435 | seq_printf(s, ",uid=%u", |
| 436 | from_kuid_munged(&init_user_ns, cifs_sb->mnt_uid)); |
Jeff Layton | 340481a3 | 2009-06-11 10:27:29 -0400 | [diff] [blame] | 437 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID) |
Fabian Frederick | 571d597 | 2014-05-13 18:04:17 +0200 | [diff] [blame] | 438 | seq_puts(s, ",forceuid"); |
Jeff Layton | 4486d6e | 2009-08-03 12:45:10 -0400 | [diff] [blame] | 439 | else |
Fabian Frederick | 571d597 | 2014-05-13 18:04:17 +0200 | [diff] [blame] | 440 | seq_puts(s, ",noforceuid"); |
Jeff Layton | 340481a3 | 2009-06-11 10:27:29 -0400 | [diff] [blame] | 441 | |
Eric W. Biederman | 1f68233 | 2013-02-06 01:20:20 -0800 | [diff] [blame] | 442 | seq_printf(s, ",gid=%u", |
| 443 | from_kgid_munged(&init_user_ns, cifs_sb->mnt_gid)); |
Jeff Layton | 340481a3 | 2009-06-11 10:27:29 -0400 | [diff] [blame] | 444 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID) |
Fabian Frederick | 571d597 | 2014-05-13 18:04:17 +0200 | [diff] [blame] | 445 | seq_puts(s, ",forcegid"); |
Jeff Layton | 4486d6e | 2009-08-03 12:45:10 -0400 | [diff] [blame] | 446 | else |
Fabian Frederick | 571d597 | 2014-05-13 18:04:17 +0200 | [diff] [blame] | 447 | seq_puts(s, ",noforcegid"); |
Jeff Layton | 8616e0f | 2009-06-11 10:27:28 -0400 | [diff] [blame] | 448 | |
Jeff Layton | 61f98ff | 2009-06-11 10:27:32 -0400 | [diff] [blame] | 449 | cifs_show_address(s, tcon->ses->server); |
Jeff Layton | 8616e0f | 2009-06-11 10:27:28 -0400 | [diff] [blame] | 450 | |
| 451 | if (!tcon->unix_ext) |
Al Viro | 5206efd | 2011-07-26 03:22:14 -0400 | [diff] [blame] | 452 | seq_printf(s, ",file_mode=0%ho,dir_mode=0%ho", |
Steve French | 2b280fa | 2008-05-17 03:12:45 +0000 | [diff] [blame] | 453 | cifs_sb->mnt_file_mode, |
| 454 | cifs_sb->mnt_dir_mode); |
Jeff Layton | 3ae35cd | 2013-07-30 13:34:40 -0400 | [diff] [blame] | 455 | |
| 456 | cifs_show_nls(s, cifs_sb->local_nls); |
| 457 | |
Jeff Layton | 8616e0f | 2009-06-11 10:27:28 -0400 | [diff] [blame] | 458 | if (tcon->seal) |
Fabian Frederick | 571d597 | 2014-05-13 18:04:17 +0200 | [diff] [blame] | 459 | seq_puts(s, ",seal"); |
Jeff Layton | 8616e0f | 2009-06-11 10:27:28 -0400 | [diff] [blame] | 460 | if (tcon->nocase) |
Fabian Frederick | 571d597 | 2014-05-13 18:04:17 +0200 | [diff] [blame] | 461 | seq_puts(s, ",nocase"); |
Jeff Layton | 8616e0f | 2009-06-11 10:27:28 -0400 | [diff] [blame] | 462 | if (tcon->retry) |
Fabian Frederick | 571d597 | 2014-05-13 18:04:17 +0200 | [diff] [blame] | 463 | seq_puts(s, ",hard"); |
Steve French | f16dfa7 | 2015-09-30 21:07:59 -0500 | [diff] [blame] | 464 | if (tcon->use_persistent) |
| 465 | seq_puts(s, ",persistenthandles"); |
Steve French | 592fafe | 2015-11-03 10:08:53 -0600 | [diff] [blame] | 466 | else if (tcon->use_resilient) |
| 467 | seq_puts(s, ",resilienthandles"); |
Pavel Shilovsky | d4ffff1 | 2011-05-26 06:02:00 +0000 | [diff] [blame] | 468 | if (tcon->unix_ext) |
Fabian Frederick | 571d597 | 2014-05-13 18:04:17 +0200 | [diff] [blame] | 469 | seq_puts(s, ",unix"); |
Pavel Shilovsky | d4ffff1 | 2011-05-26 06:02:00 +0000 | [diff] [blame] | 470 | else |
Fabian Frederick | 571d597 | 2014-05-13 18:04:17 +0200 | [diff] [blame] | 471 | seq_puts(s, ",nounix"); |
Jeff Layton | 8616e0f | 2009-06-11 10:27:28 -0400 | [diff] [blame] | 472 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) |
Fabian Frederick | 571d597 | 2014-05-13 18:04:17 +0200 | [diff] [blame] | 473 | seq_puts(s, ",posixpaths"); |
Jeff Layton | 8616e0f | 2009-06-11 10:27:28 -0400 | [diff] [blame] | 474 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) |
Fabian Frederick | 571d597 | 2014-05-13 18:04:17 +0200 | [diff] [blame] | 475 | seq_puts(s, ",setuids"); |
Steve French | 9593265 | 2016-09-23 01:36:34 -0500 | [diff] [blame] | 476 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UID_FROM_ACL) |
| 477 | seq_puts(s, ",idsfromsid"); |
Jeff Layton | 8616e0f | 2009-06-11 10:27:28 -0400 | [diff] [blame] | 478 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) |
Fabian Frederick | 571d597 | 2014-05-13 18:04:17 +0200 | [diff] [blame] | 479 | seq_puts(s, ",serverino"); |
Pavel Shilovsky | d4ffff1 | 2011-05-26 06:02:00 +0000 | [diff] [blame] | 480 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RWPIDFORWARD) |
Fabian Frederick | 571d597 | 2014-05-13 18:04:17 +0200 | [diff] [blame] | 481 | seq_puts(s, ",rwpidforward"); |
Pavel Shilovsky | d4ffff1 | 2011-05-26 06:02:00 +0000 | [diff] [blame] | 482 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL) |
Fabian Frederick | 571d597 | 2014-05-13 18:04:17 +0200 | [diff] [blame] | 483 | seq_puts(s, ",forcemand"); |
Jeff Layton | 8616e0f | 2009-06-11 10:27:28 -0400 | [diff] [blame] | 484 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR) |
Fabian Frederick | 571d597 | 2014-05-13 18:04:17 +0200 | [diff] [blame] | 485 | seq_puts(s, ",nouser_xattr"); |
Jeff Layton | 8616e0f | 2009-06-11 10:27:28 -0400 | [diff] [blame] | 486 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR) |
Fabian Frederick | 571d597 | 2014-05-13 18:04:17 +0200 | [diff] [blame] | 487 | seq_puts(s, ",mapchars"); |
Nakajima Akira | bc8ebdc4 | 2015-02-13 15:35:58 +0900 | [diff] [blame] | 488 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SFM_CHR) |
| 489 | seq_puts(s, ",mapposix"); |
Jeff Layton | 8616e0f | 2009-06-11 10:27:28 -0400 | [diff] [blame] | 490 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) |
Fabian Frederick | 571d597 | 2014-05-13 18:04:17 +0200 | [diff] [blame] | 491 | seq_puts(s, ",sfu"); |
Jeff Layton | 8616e0f | 2009-06-11 10:27:28 -0400 | [diff] [blame] | 492 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) |
Fabian Frederick | 571d597 | 2014-05-13 18:04:17 +0200 | [diff] [blame] | 493 | seq_puts(s, ",nobrl"); |
Jeff Layton | 8616e0f | 2009-06-11 10:27:28 -0400 | [diff] [blame] | 494 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) |
Fabian Frederick | 571d597 | 2014-05-13 18:04:17 +0200 | [diff] [blame] | 495 | seq_puts(s, ",cifsacl"); |
Jeff Layton | 8616e0f | 2009-06-11 10:27:28 -0400 | [diff] [blame] | 496 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) |
Fabian Frederick | 571d597 | 2014-05-13 18:04:17 +0200 | [diff] [blame] | 497 | seq_puts(s, ",dynperm"); |
Al Viro | 34c80b1 | 2011-12-08 21:32:45 -0500 | [diff] [blame] | 498 | if (root->d_sb->s_flags & MS_POSIXACL) |
Fabian Frederick | 571d597 | 2014-05-13 18:04:17 +0200 | [diff] [blame] | 499 | seq_puts(s, ",acl"); |
Stefan Metzmacher | 736a332 | 2010-07-30 14:56:00 +0200 | [diff] [blame] | 500 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) |
Fabian Frederick | 571d597 | 2014-05-13 18:04:17 +0200 | [diff] [blame] | 501 | seq_puts(s, ",mfsymlinks"); |
Suresh Jayaraman | 476428f | 2010-11-24 17:49:07 +0530 | [diff] [blame] | 502 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE) |
Fabian Frederick | 571d597 | 2014-05-13 18:04:17 +0200 | [diff] [blame] | 503 | seq_puts(s, ",fsc"); |
Steve French | 71c424b | 2011-10-19 20:44:48 -0500 | [diff] [blame] | 504 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC) |
Fabian Frederick | 571d597 | 2014-05-13 18:04:17 +0200 | [diff] [blame] | 505 | seq_puts(s, ",nostrictsync"); |
Steve French | 71c424b | 2011-10-19 20:44:48 -0500 | [diff] [blame] | 506 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) |
Fabian Frederick | 571d597 | 2014-05-13 18:04:17 +0200 | [diff] [blame] | 507 | seq_puts(s, ",noperm"); |
Sachin Prabhu | 3c7c87f | 2012-04-24 15:28:14 +0100 | [diff] [blame] | 508 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPUID) |
Eric W. Biederman | 1f68233 | 2013-02-06 01:20:20 -0800 | [diff] [blame] | 509 | seq_printf(s, ",backupuid=%u", |
| 510 | from_kuid_munged(&init_user_ns, |
| 511 | cifs_sb->mnt_backupuid)); |
Sachin Prabhu | 3c7c87f | 2012-04-24 15:28:14 +0100 | [diff] [blame] | 512 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPGID) |
Eric W. Biederman | 1f68233 | 2013-02-06 01:20:20 -0800 | [diff] [blame] | 513 | seq_printf(s, ",backupgid=%u", |
| 514 | from_kgid_munged(&init_user_ns, |
| 515 | cifs_sb->mnt_backupgid)); |
Steve French | 2b280fa | 2008-05-17 03:12:45 +0000 | [diff] [blame] | 516 | |
Sachin Prabhu | 28f8881 | 2012-04-24 15:28:30 +0100 | [diff] [blame] | 517 | seq_printf(s, ",rsize=%u", cifs_sb->rsize); |
| 518 | seq_printf(s, ",wsize=%u", cifs_sb->wsize); |
Steve French | adfeb3e | 2015-12-18 12:31:36 -0600 | [diff] [blame] | 519 | seq_printf(s, ",echo_interval=%lu", |
| 520 | tcon->ses->server->echo_interval / HZ); |
Suresh Jayaraman | 6d20e84 | 2010-12-01 14:42:28 +0530 | [diff] [blame] | 521 | /* convert actimeo and display it in seconds */ |
Sachin Prabhu | 156d179 | 2012-04-25 12:10:14 +0100 | [diff] [blame] | 522 | seq_printf(s, ",actimeo=%lu", cifs_sb->actimeo / HZ); |
Jeff Layton | 8616e0f | 2009-06-11 10:27:28 -0400 | [diff] [blame] | 523 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 524 | return 0; |
| 525 | } |
| 526 | |
Al Viro | 42faad9 | 2008-04-24 07:21:56 -0400 | [diff] [blame] | 527 | static void cifs_umount_begin(struct super_block *sb) |
Steve French | 68058e7 | 2005-10-10 10:34:22 -0700 | [diff] [blame] | 528 | { |
Al Viro | 42faad9 | 2008-04-24 07:21:56 -0400 | [diff] [blame] | 529 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 530 | struct cifs_tcon *tcon; |
Steve French | 68058e7 | 2005-10-10 10:34:22 -0700 | [diff] [blame] | 531 | |
Steve French | 4523cc3 | 2007-04-30 20:13:06 +0000 | [diff] [blame] | 532 | if (cifs_sb == NULL) |
Steve French | 9e2e85f | 2005-10-10 14:28:38 -0700 | [diff] [blame] | 533 | return; |
| 534 | |
Jeff Layton | 0d424ad | 2010-09-20 16:01:35 -0700 | [diff] [blame] | 535 | tcon = cifs_sb_master_tcon(cifs_sb); |
Jeff Layton | f1987b4 | 2008-11-15 11:12:47 -0500 | [diff] [blame] | 536 | |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 537 | spin_lock(&cifs_tcp_ses_lock); |
Steve French | ad8034f | 2009-06-26 03:25:49 +0000 | [diff] [blame] | 538 | if ((tcon->tc_count > 1) || (tcon->tidStatus == CifsExiting)) { |
| 539 | /* we have other mounts to same share or we have |
| 540 | already tried to force umount this and woken up |
| 541 | all waiting network requests, nothing to do */ |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 542 | spin_unlock(&cifs_tcp_ses_lock); |
Steve French | ad8034f | 2009-06-26 03:25:49 +0000 | [diff] [blame] | 543 | return; |
| 544 | } else if (tcon->tc_count == 1) |
Steve French | 5e1253b | 2005-10-10 14:06:37 -0700 | [diff] [blame] | 545 | tcon->tidStatus = CifsExiting; |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 546 | spin_unlock(&cifs_tcp_ses_lock); |
Steve French | 5e1253b | 2005-10-10 14:06:37 -0700 | [diff] [blame] | 547 | |
Steve French | 3a5ff61 | 2006-07-14 22:37:11 +0000 | [diff] [blame] | 548 | /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */ |
Steve French | 7b7abfe | 2005-11-09 15:21:09 -0800 | [diff] [blame] | 549 | /* cancel_notify_requests(tcon); */ |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 550 | if (tcon->ses && tcon->ses->server) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 551 | cifs_dbg(FYI, "wake up tasks now - umount begin not complete\n"); |
Steve French | 9e2e85f | 2005-10-10 14:28:38 -0700 | [diff] [blame] | 552 | wake_up_all(&tcon->ses->server->request_q); |
Steve French | 6ab16d2 | 2005-11-29 20:55:11 -0800 | [diff] [blame] | 553 | wake_up_all(&tcon->ses->server->response_q); |
| 554 | msleep(1); /* yield */ |
| 555 | /* we have to kick the requests once more */ |
| 556 | wake_up_all(&tcon->ses->server->response_q); |
| 557 | msleep(1); |
Steve French | 5e1253b | 2005-10-10 14:06:37 -0700 | [diff] [blame] | 558 | } |
Steve French | 68058e7 | 2005-10-10 10:34:22 -0700 | [diff] [blame] | 559 | |
| 560 | return; |
| 561 | } |
Steve French | 68058e7 | 2005-10-10 10:34:22 -0700 | [diff] [blame] | 562 | |
Steve French | bf97d28 | 2006-09-28 21:34:06 +0000 | [diff] [blame] | 563 | #ifdef CONFIG_CIFS_STATS2 |
Al Viro | 6413237 | 2011-12-08 20:51:13 -0500 | [diff] [blame] | 564 | static int cifs_show_stats(struct seq_file *s, struct dentry *root) |
Steve French | bf97d28 | 2006-09-28 21:34:06 +0000 | [diff] [blame] | 565 | { |
| 566 | /* BB FIXME */ |
| 567 | return 0; |
| 568 | } |
| 569 | #endif |
| 570 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | static int cifs_remount(struct super_block *sb, int *flags, char *data) |
| 572 | { |
Theodore Ts'o | 02b9984 | 2014-03-13 10:14:33 -0400 | [diff] [blame] | 573 | sync_filesystem(sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 574 | *flags |= MS_NODIRATIME; |
| 575 | return 0; |
| 576 | } |
| 577 | |
Al Viro | 45321ac | 2010-06-07 13:43:19 -0400 | [diff] [blame] | 578 | static int cifs_drop_inode(struct inode *inode) |
Jeff Layton | 12420ac | 2010-06-01 14:47:40 -0400 | [diff] [blame] | 579 | { |
| 580 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
| 581 | |
Al Viro | 45321ac | 2010-06-07 13:43:19 -0400 | [diff] [blame] | 582 | /* no serverino => unconditional eviction */ |
| 583 | return !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) || |
| 584 | generic_drop_inode(inode); |
Jeff Layton | 12420ac | 2010-06-01 14:47:40 -0400 | [diff] [blame] | 585 | } |
| 586 | |
Josef 'Jeff' Sipek | ee9b6d6 | 2007-02-12 00:55:41 -0800 | [diff] [blame] | 587 | static const struct super_operations cifs_super_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 588 | .statfs = cifs_statfs, |
| 589 | .alloc_inode = cifs_alloc_inode, |
| 590 | .destroy_inode = cifs_destroy_inode, |
Jeff Layton | 12420ac | 2010-06-01 14:47:40 -0400 | [diff] [blame] | 591 | .drop_inode = cifs_drop_inode, |
Al Viro | b57922d | 2010-06-07 14:34:48 -0400 | [diff] [blame] | 592 | .evict_inode = cifs_evict_inode, |
Jeff Layton | 12420ac | 2010-06-01 14:47:40 -0400 | [diff] [blame] | 593 | /* .delete_inode = cifs_delete_inode, */ /* Do not need above |
| 594 | function unless later we add lazy close of inodes or unless the |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 595 | kernel forgets to call us with the same number of releases (closes) |
| 596 | as opens */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 597 | .show_options = cifs_show_options, |
Steve French | 7b7abfe | 2005-11-09 15:21:09 -0800 | [diff] [blame] | 598 | .umount_begin = cifs_umount_begin, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | .remount_fs = cifs_remount, |
Steve French | bf97d28 | 2006-09-28 21:34:06 +0000 | [diff] [blame] | 600 | #ifdef CONFIG_CIFS_STATS2 |
Steve French | f46d3e1 | 2006-09-30 01:08:55 +0000 | [diff] [blame] | 601 | .show_stats = cifs_show_stats, |
Steve French | bf97d28 | 2006-09-28 21:34:06 +0000 | [diff] [blame] | 602 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 603 | }; |
| 604 | |
Steve French | f87d39d | 2011-05-27 03:50:55 +0000 | [diff] [blame] | 605 | /* |
| 606 | * Get root dentry from superblock according to prefix path mount option. |
| 607 | * Return dentry with refcount + 1 on success and NULL otherwise. |
| 608 | */ |
| 609 | static struct dentry * |
| 610 | cifs_get_root(struct smb_vol *vol, struct super_block *sb) |
| 611 | { |
Al Viro | fec11dd | 2011-07-18 13:50:40 -0400 | [diff] [blame] | 612 | struct dentry *dentry; |
Steve French | f87d39d | 2011-05-27 03:50:55 +0000 | [diff] [blame] | 613 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
Al Viro | fec11dd | 2011-07-18 13:50:40 -0400 | [diff] [blame] | 614 | char *full_path = NULL; |
| 615 | char *s, *p; |
Steve French | f87d39d | 2011-05-27 03:50:55 +0000 | [diff] [blame] | 616 | char sep; |
| 617 | |
Sachin Prabhu | 348c1bf | 2016-07-29 22:38:21 +0100 | [diff] [blame] | 618 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH) |
| 619 | return dget(sb->s_root); |
| 620 | |
Steve French | 6d3ea7e | 2012-11-28 22:34:41 -0600 | [diff] [blame] | 621 | full_path = cifs_build_path_to_root(vol, cifs_sb, |
Sachin Prabhu | 374402a | 2016-12-15 12:31:19 +0530 | [diff] [blame] | 622 | cifs_sb_master_tcon(cifs_sb), 0); |
Steve French | f87d39d | 2011-05-27 03:50:55 +0000 | [diff] [blame] | 623 | if (full_path == NULL) |
Al Viro | 9403c9c | 2011-06-17 10:02:59 -0400 | [diff] [blame] | 624 | return ERR_PTR(-ENOMEM); |
Steve French | f87d39d | 2011-05-27 03:50:55 +0000 | [diff] [blame] | 625 | |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 626 | cifs_dbg(FYI, "Get root dentry for %s\n", full_path); |
Steve French | f87d39d | 2011-05-27 03:50:55 +0000 | [diff] [blame] | 627 | |
Steve French | f87d39d | 2011-05-27 03:50:55 +0000 | [diff] [blame] | 628 | sep = CIFS_DIR_SEP(cifs_sb); |
Al Viro | fec11dd | 2011-07-18 13:50:40 -0400 | [diff] [blame] | 629 | dentry = dget(sb->s_root); |
| 630 | p = s = full_path; |
Steve French | f87d39d | 2011-05-27 03:50:55 +0000 | [diff] [blame] | 631 | |
Al Viro | fec11dd | 2011-07-18 13:50:40 -0400 | [diff] [blame] | 632 | do { |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 633 | struct inode *dir = d_inode(dentry); |
Al Viro | fec11dd | 2011-07-18 13:50:40 -0400 | [diff] [blame] | 634 | struct dentry *child; |
Steve French | f87d39d | 2011-05-27 03:50:55 +0000 | [diff] [blame] | 635 | |
Pavel Shilovsky | 5b980b0 | 2011-08-21 19:30:15 +0400 | [diff] [blame] | 636 | if (!dir) { |
| 637 | dput(dentry); |
| 638 | dentry = ERR_PTR(-ENOENT); |
| 639 | break; |
| 640 | } |
Jeff Layton | ce2ac52 | 2013-02-01 15:11:01 -0500 | [diff] [blame] | 641 | if (!S_ISDIR(dir->i_mode)) { |
| 642 | dput(dentry); |
| 643 | dentry = ERR_PTR(-ENOTDIR); |
| 644 | break; |
| 645 | } |
Pavel Shilovsky | 5b980b0 | 2011-08-21 19:30:15 +0400 | [diff] [blame] | 646 | |
Al Viro | fec11dd | 2011-07-18 13:50:40 -0400 | [diff] [blame] | 647 | /* skip separators */ |
| 648 | while (*s == sep) |
| 649 | s++; |
| 650 | if (!*s) |
| 651 | break; |
| 652 | p = s++; |
| 653 | /* next separator */ |
| 654 | while (*s && *s != sep) |
| 655 | s++; |
Steve French | f87d39d | 2011-05-27 03:50:55 +0000 | [diff] [blame] | 656 | |
Al Viro | 85f4048 | 2016-03-07 23:20:44 -0500 | [diff] [blame] | 657 | child = lookup_one_len_unlocked(p, dentry, s - p); |
Al Viro | fec11dd | 2011-07-18 13:50:40 -0400 | [diff] [blame] | 658 | dput(dentry); |
| 659 | dentry = child; |
| 660 | } while (!IS_ERR(dentry)); |
Steve French | f87d39d | 2011-05-27 03:50:55 +0000 | [diff] [blame] | 661 | kfree(full_path); |
Al Viro | fec11dd | 2011-07-18 13:50:40 -0400 | [diff] [blame] | 662 | return dentry; |
Steve French | f87d39d | 2011-05-27 03:50:55 +0000 | [diff] [blame] | 663 | } |
| 664 | |
Al Viro | ee01a14 | 2011-06-17 09:47:23 -0400 | [diff] [blame] | 665 | static int cifs_set_super(struct super_block *sb, void *data) |
| 666 | { |
| 667 | struct cifs_mnt_data *mnt_data = data; |
| 668 | sb->s_fs_info = mnt_data->cifs_sb; |
| 669 | return set_anon_super(sb, NULL); |
| 670 | } |
| 671 | |
Al Viro | d753ed9 | 2010-07-26 12:52:33 +0400 | [diff] [blame] | 672 | static struct dentry * |
| 673 | cifs_do_mount(struct file_system_type *fs_type, |
Pavel Shilovsky | 724d9f1 | 2011-05-05 09:55:12 +0000 | [diff] [blame] | 674 | int flags, const char *dev_name, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 675 | { |
| 676 | int rc; |
Jan Blunck | db71922 | 2010-08-15 22:51:10 +0200 | [diff] [blame] | 677 | struct super_block *sb; |
Pavel Shilovsky | 724d9f1 | 2011-05-05 09:55:12 +0000 | [diff] [blame] | 678 | struct cifs_sb_info *cifs_sb; |
| 679 | struct smb_vol *volume_info; |
Pavel Shilovsky | 25c7f41 | 2011-05-26 23:35:47 +0400 | [diff] [blame] | 680 | struct cifs_mnt_data mnt_data; |
Pavel Shilovsky | 724d9f1 | 2011-05-05 09:55:12 +0000 | [diff] [blame] | 681 | struct dentry *root; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 682 | |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 683 | cifs_dbg(FYI, "Devname: %s flags: %d\n", dev_name, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 684 | |
Jeff Layton | 04db79b | 2011-07-06 08:10:38 -0400 | [diff] [blame] | 685 | volume_info = cifs_get_volume_info((char *)data, dev_name); |
| 686 | if (IS_ERR(volume_info)) |
| 687 | return ERR_CAST(volume_info); |
Pavel Shilovsky | 724d9f1 | 2011-05-05 09:55:12 +0000 | [diff] [blame] | 688 | |
| 689 | cifs_sb = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL); |
| 690 | if (cifs_sb == NULL) { |
| 691 | root = ERR_PTR(-ENOMEM); |
Al Viro | 5c4f1ad | 2011-06-17 09:56:55 -0400 | [diff] [blame] | 692 | goto out_nls; |
Pavel Shilovsky | 724d9f1 | 2011-05-05 09:55:12 +0000 | [diff] [blame] | 693 | } |
| 694 | |
Al Viro | 5d3bc60 | 2011-06-17 09:17:28 -0400 | [diff] [blame] | 695 | cifs_sb->mountdata = kstrndup(data, PAGE_SIZE, GFP_KERNEL); |
| 696 | if (cifs_sb->mountdata == NULL) { |
| 697 | root = ERR_PTR(-ENOMEM); |
Sachin Prabhu | 4214ebf | 2016-07-29 22:38:19 +0100 | [diff] [blame] | 698 | goto out_free; |
Al Viro | 5d3bc60 | 2011-06-17 09:17:28 -0400 | [diff] [blame] | 699 | } |
| 700 | |
Sachin Prabhu | 4214ebf | 2016-07-29 22:38:19 +0100 | [diff] [blame] | 701 | rc = cifs_setup_cifs_sb(volume_info, cifs_sb); |
| 702 | if (rc) { |
| 703 | root = ERR_PTR(rc); |
| 704 | goto out_free; |
Aurelien Aptel | a6b5058 | 2016-05-25 19:59:09 +0200 | [diff] [blame] | 705 | } |
| 706 | |
Al Viro | 97d1152 | 2011-06-17 09:29:57 -0400 | [diff] [blame] | 707 | rc = cifs_mount(cifs_sb, volume_info); |
| 708 | if (rc) { |
| 709 | if (!(flags & MS_SILENT)) |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 710 | cifs_dbg(VFS, "cifs_mount failed w/return code = %d\n", |
| 711 | rc); |
Al Viro | 97d1152 | 2011-06-17 09:29:57 -0400 | [diff] [blame] | 712 | root = ERR_PTR(rc); |
Sachin Prabhu | 4214ebf | 2016-07-29 22:38:19 +0100 | [diff] [blame] | 713 | goto out_free; |
Al Viro | 97d1152 | 2011-06-17 09:29:57 -0400 | [diff] [blame] | 714 | } |
| 715 | |
Pavel Shilovsky | 25c7f41 | 2011-05-26 23:35:47 +0400 | [diff] [blame] | 716 | mnt_data.vol = volume_info; |
| 717 | mnt_data.cifs_sb = cifs_sb; |
| 718 | mnt_data.flags = flags; |
| 719 | |
David Howells | 9249e17 | 2012-06-25 12:55:37 +0100 | [diff] [blame] | 720 | /* BB should we make this contingent on mount parm? */ |
| 721 | flags |= MS_NODIRATIME | MS_NOATIME; |
| 722 | |
| 723 | sb = sget(fs_type, cifs_match_super, cifs_set_super, flags, &mnt_data); |
Pavel Shilovsky | 724d9f1 | 2011-05-05 09:55:12 +0000 | [diff] [blame] | 724 | if (IS_ERR(sb)) { |
Pavel Shilovsky | 724d9f1 | 2011-05-05 09:55:12 +0000 | [diff] [blame] | 725 | root = ERR_CAST(sb); |
Al Viro | 97d1152 | 2011-06-17 09:29:57 -0400 | [diff] [blame] | 726 | cifs_umount(cifs_sb); |
Al Viro | d757d71 | 2011-06-17 09:42:43 -0400 | [diff] [blame] | 727 | goto out; |
Pavel Shilovsky | 724d9f1 | 2011-05-05 09:55:12 +0000 | [diff] [blame] | 728 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 729 | |
Al Viro | ee01a14 | 2011-06-17 09:47:23 -0400 | [diff] [blame] | 730 | if (sb->s_root) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 731 | cifs_dbg(FYI, "Use existing superblock\n"); |
Al Viro | 97d1152 | 2011-06-17 09:29:57 -0400 | [diff] [blame] | 732 | cifs_umount(cifs_sb); |
Al Viro | 5c4f1ad | 2011-06-17 09:56:55 -0400 | [diff] [blame] | 733 | } else { |
Al Viro | 5c4f1ad | 2011-06-17 09:56:55 -0400 | [diff] [blame] | 734 | rc = cifs_read_super(sb); |
| 735 | if (rc) { |
| 736 | root = ERR_PTR(rc); |
| 737 | goto out_super; |
| 738 | } |
| 739 | |
| 740 | sb->s_flags |= MS_ACTIVE; |
Pavel Shilovsky | 25c7f41 | 2011-05-26 23:35:47 +0400 | [diff] [blame] | 741 | } |
| 742 | |
Sachin Prabhu | 348c1bf | 2016-07-29 22:38:21 +0100 | [diff] [blame] | 743 | root = cifs_get_root(volume_info, sb); |
Al Viro | 9403c9c | 2011-06-17 10:02:59 -0400 | [diff] [blame] | 744 | if (IS_ERR(root)) |
Al Viro | fa18f1b | 2011-06-17 09:50:44 -0400 | [diff] [blame] | 745 | goto out_super; |
Al Viro | fa18f1b | 2011-06-17 09:50:44 -0400 | [diff] [blame] | 746 | |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 747 | cifs_dbg(FYI, "dentry root is: %p\n", root); |
Pavel Shilovsky | 25c7f41 | 2011-05-26 23:35:47 +0400 | [diff] [blame] | 748 | goto out; |
| 749 | |
Pavel Shilovsky | 641a58d | 2011-05-26 00:02:16 +0400 | [diff] [blame] | 750 | out_super: |
Pavel Shilovsky | 641a58d | 2011-05-26 00:02:16 +0400 | [diff] [blame] | 751 | deactivate_locked_super(sb); |
Pavel Shilovsky | 641a58d | 2011-05-26 00:02:16 +0400 | [diff] [blame] | 752 | out: |
Jeff Layton | f9e59bc | 2011-07-06 08:10:37 -0400 | [diff] [blame] | 753 | cifs_cleanup_volume_info(volume_info); |
Pavel Shilovsky | 724d9f1 | 2011-05-05 09:55:12 +0000 | [diff] [blame] | 754 | return root; |
Al Viro | 5c4f1ad | 2011-06-17 09:56:55 -0400 | [diff] [blame] | 755 | |
Sachin Prabhu | 4214ebf | 2016-07-29 22:38:19 +0100 | [diff] [blame] | 756 | out_free: |
| 757 | kfree(cifs_sb->prepath); |
Al Viro | 5c4f1ad | 2011-06-17 09:56:55 -0400 | [diff] [blame] | 758 | kfree(cifs_sb->mountdata); |
Al Viro | 5c4f1ad | 2011-06-17 09:56:55 -0400 | [diff] [blame] | 759 | kfree(cifs_sb); |
| 760 | out_nls: |
| 761 | unload_nls(volume_info->local_nls); |
| 762 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 763 | } |
| 764 | |
Jeff Layton | 08bc035 | 2014-05-23 06:50:21 -0400 | [diff] [blame] | 765 | static ssize_t |
| 766 | cifs_loose_read_iter(struct kiocb *iocb, struct iov_iter *iter) |
| 767 | { |
| 768 | ssize_t rc; |
| 769 | struct inode *inode = file_inode(iocb->ki_filp); |
| 770 | |
Ross Lagerwall | 882137c | 2015-12-02 14:46:07 +0000 | [diff] [blame] | 771 | if (iocb->ki_filp->f_flags & O_DIRECT) |
| 772 | return cifs_user_readv(iocb, iter); |
| 773 | |
Jeff Layton | 08bc035 | 2014-05-23 06:50:21 -0400 | [diff] [blame] | 774 | rc = cifs_revalidate_mapping(inode); |
| 775 | if (rc) |
| 776 | return rc; |
| 777 | |
| 778 | return generic_file_read_iter(iocb, iter); |
| 779 | } |
| 780 | |
Al Viro | 3dae875 | 2014-04-03 12:05:17 -0400 | [diff] [blame] | 781 | static ssize_t cifs_file_write_iter(struct kiocb *iocb, struct iov_iter *from) |
Steve French | 87c89dd | 2005-11-17 17:03:00 -0800 | [diff] [blame] | 782 | { |
Al Viro | 496ad9a | 2013-01-23 17:07:38 -0500 | [diff] [blame] | 783 | struct inode *inode = file_inode(iocb->ki_filp); |
Sachin Prabhu | c11f1df | 2014-03-11 16:11:47 +0000 | [diff] [blame] | 784 | struct cifsInodeInfo *cinode = CIFS_I(inode); |
Steve French | 87c89dd | 2005-11-17 17:03:00 -0800 | [diff] [blame] | 785 | ssize_t written; |
Pavel Shilovsky | 72432ff | 2011-01-24 14:16:35 -0500 | [diff] [blame] | 786 | int rc; |
Steve French | 87c89dd | 2005-11-17 17:03:00 -0800 | [diff] [blame] | 787 | |
Ross Lagerwall | 882137c | 2015-12-02 14:46:07 +0000 | [diff] [blame] | 788 | if (iocb->ki_filp->f_flags & O_DIRECT) { |
| 789 | written = cifs_user_writev(iocb, from); |
| 790 | if (written > 0 && CIFS_CACHE_READ(cinode)) { |
| 791 | cifs_zap_mapping(inode); |
| 792 | cifs_dbg(FYI, |
| 793 | "Set no oplock for inode=%p after a write operation\n", |
| 794 | inode); |
| 795 | cinode->oplock = 0; |
| 796 | } |
| 797 | return written; |
| 798 | } |
| 799 | |
Sachin Prabhu | c11f1df | 2014-03-11 16:11:47 +0000 | [diff] [blame] | 800 | written = cifs_get_writer(cinode); |
| 801 | if (written) |
| 802 | return written; |
| 803 | |
Al Viro | 3dae875 | 2014-04-03 12:05:17 -0400 | [diff] [blame] | 804 | written = generic_file_write_iter(iocb, from); |
Pavel Shilovsky | 72432ff | 2011-01-24 14:16:35 -0500 | [diff] [blame] | 805 | |
Pavel Shilovsky | 18cceb6 | 2013-09-05 13:01:06 +0400 | [diff] [blame] | 806 | if (CIFS_CACHE_WRITE(CIFS_I(inode))) |
Sachin Prabhu | c11f1df | 2014-03-11 16:11:47 +0000 | [diff] [blame] | 807 | goto out; |
Pavel Shilovsky | 72432ff | 2011-01-24 14:16:35 -0500 | [diff] [blame] | 808 | |
| 809 | rc = filemap_fdatawrite(inode->i_mapping); |
| 810 | if (rc) |
Al Viro | 3dae875 | 2014-04-03 12:05:17 -0400 | [diff] [blame] | 811 | cifs_dbg(FYI, "cifs_file_write_iter: %d rc on %p inode\n", |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 812 | rc, inode); |
Pavel Shilovsky | 72432ff | 2011-01-24 14:16:35 -0500 | [diff] [blame] | 813 | |
Sachin Prabhu | c11f1df | 2014-03-11 16:11:47 +0000 | [diff] [blame] | 814 | out: |
| 815 | cifs_put_writer(cinode); |
Steve French | 87c89dd | 2005-11-17 17:03:00 -0800 | [diff] [blame] | 816 | return written; |
| 817 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 818 | |
Andrew Morton | 965c8e5 | 2012-12-17 15:59:39 -0800 | [diff] [blame] | 819 | static loff_t cifs_llseek(struct file *file, loff_t offset, int whence) |
Steve French | c32a0b6 | 2006-01-12 14:41:28 -0800 | [diff] [blame] | 820 | { |
Josef Bacik | 06222e4 | 2011-07-18 13:21:38 -0400 | [diff] [blame] | 821 | /* |
Andrew Morton | 965c8e5 | 2012-12-17 15:59:39 -0800 | [diff] [blame] | 822 | * whence == SEEK_END || SEEK_DATA || SEEK_HOLE => we must revalidate |
Josef Bacik | 06222e4 | 2011-07-18 13:21:38 -0400 | [diff] [blame] | 823 | * the cached file length |
| 824 | */ |
Andrew Morton | 965c8e5 | 2012-12-17 15:59:39 -0800 | [diff] [blame] | 825 | if (whence != SEEK_SET && whence != SEEK_CUR) { |
Pavel Shilovsky | 6feb989 | 2011-04-07 18:18:11 +0400 | [diff] [blame] | 826 | int rc; |
Al Viro | 496ad9a | 2013-01-23 17:07:38 -0500 | [diff] [blame] | 827 | struct inode *inode = file_inode(file); |
Steve French | 030e9d8 | 2007-02-01 04:27:59 +0000 | [diff] [blame] | 828 | |
Pavel Shilovsky | 6feb989 | 2011-04-07 18:18:11 +0400 | [diff] [blame] | 829 | /* |
| 830 | * We need to be sure that all dirty pages are written and the |
| 831 | * server has the newest file length. |
| 832 | */ |
Pavel Shilovsky | 18cceb6 | 2013-09-05 13:01:06 +0400 | [diff] [blame] | 833 | if (!CIFS_CACHE_READ(CIFS_I(inode)) && inode->i_mapping && |
Pavel Shilovsky | 6feb989 | 2011-04-07 18:18:11 +0400 | [diff] [blame] | 834 | inode->i_mapping->nrpages != 0) { |
| 835 | rc = filemap_fdatawait(inode->i_mapping); |
Steve French | 156ecb2 | 2011-05-20 17:00:01 +0000 | [diff] [blame] | 836 | if (rc) { |
| 837 | mapping_set_error(inode->i_mapping, rc); |
| 838 | return rc; |
| 839 | } |
Pavel Shilovsky | 6feb989 | 2011-04-07 18:18:11 +0400 | [diff] [blame] | 840 | } |
| 841 | /* |
| 842 | * Some applications poll for the file length in this strange |
| 843 | * way so we must seek to end on non-oplocked files by |
| 844 | * setting the revalidate time to zero. |
| 845 | */ |
| 846 | CIFS_I(inode)->time = 0; |
Steve French | 030e9d8 | 2007-02-01 04:27:59 +0000 | [diff] [blame] | 847 | |
Pavel Shilovsky | 6feb989 | 2011-04-07 18:18:11 +0400 | [diff] [blame] | 848 | rc = cifs_revalidate_file_attr(file); |
| 849 | if (rc < 0) |
| 850 | return (loff_t)rc; |
Steve French | c32a0b6 | 2006-01-12 14:41:28 -0800 | [diff] [blame] | 851 | } |
Andrew Morton | 965c8e5 | 2012-12-17 15:59:39 -0800 | [diff] [blame] | 852 | return generic_file_llseek(file, offset, whence); |
Steve French | c32a0b6 | 2006-01-12 14:41:28 -0800 | [diff] [blame] | 853 | } |
| 854 | |
Jeff Layton | e6f5c78 | 2014-08-22 10:40:25 -0400 | [diff] [blame] | 855 | static int |
| 856 | cifs_setlease(struct file *file, long arg, struct file_lock **lease, void **priv) |
Steve French | 84210e9 | 2008-10-23 04:42:37 +0000 | [diff] [blame] | 857 | { |
Pavel Shilovsky | 18cceb6 | 2013-09-05 13:01:06 +0400 | [diff] [blame] | 858 | /* |
| 859 | * Note that this is called by vfs setlease with i_lock held to |
| 860 | * protect *lease from going away. |
| 861 | */ |
Al Viro | 496ad9a | 2013-01-23 17:07:38 -0500 | [diff] [blame] | 862 | struct inode *inode = file_inode(file); |
Jeff Layton | ba00ba6 | 2010-09-20 16:01:31 -0700 | [diff] [blame] | 863 | struct cifsFileInfo *cfile = file->private_data; |
Steve French | 84210e9 | 2008-10-23 04:42:37 +0000 | [diff] [blame] | 864 | |
| 865 | if (!(S_ISREG(inode->i_mode))) |
| 866 | return -EINVAL; |
| 867 | |
Jeff Layton | 0244080 | 2014-08-09 10:16:44 -0400 | [diff] [blame] | 868 | /* Check if file is oplocked if this is request for new lease */ |
| 869 | if (arg == F_UNLCK || |
| 870 | ((arg == F_RDLCK) && CIFS_CACHE_READ(CIFS_I(inode))) || |
Pavel Shilovsky | 18cceb6 | 2013-09-05 13:01:06 +0400 | [diff] [blame] | 871 | ((arg == F_WRLCK) && CIFS_CACHE_WRITE(CIFS_I(inode)))) |
Jeff Layton | e6f5c78 | 2014-08-22 10:40:25 -0400 | [diff] [blame] | 872 | return generic_setlease(file, arg, lease, priv); |
Jeff Layton | 13cfb73 | 2010-09-29 19:51:11 -0400 | [diff] [blame] | 873 | else if (tlink_tcon(cfile->tlink)->local_lease && |
Pavel Shilovsky | 18cceb6 | 2013-09-05 13:01:06 +0400 | [diff] [blame] | 874 | !CIFS_CACHE_READ(CIFS_I(inode))) |
| 875 | /* |
| 876 | * If the server claims to support oplock on this file, then we |
| 877 | * still need to check oplock even if the local_lease mount |
| 878 | * option is set, but there are servers which do not support |
| 879 | * oplock for which this mount option may be useful if the user |
| 880 | * knows that the file won't be changed on the server by anyone |
| 881 | * else. |
| 882 | */ |
Jeff Layton | e6f5c78 | 2014-08-22 10:40:25 -0400 | [diff] [blame] | 883 | return generic_setlease(file, arg, lease, priv); |
Christoph Hellwig | 51ee4b8 | 2010-10-31 08:35:10 -0400 | [diff] [blame] | 884 | else |
Steve French | 84210e9 | 2008-10-23 04:42:37 +0000 | [diff] [blame] | 885 | return -EAGAIN; |
| 886 | } |
Steve French | 84210e9 | 2008-10-23 04:42:37 +0000 | [diff] [blame] | 887 | |
Igor Mammedov | e6ab158 | 2008-01-11 01:49:48 +0000 | [diff] [blame] | 888 | struct file_system_type cifs_fs_type = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 889 | .owner = THIS_MODULE, |
| 890 | .name = "cifs", |
Al Viro | d753ed9 | 2010-07-26 12:52:33 +0400 | [diff] [blame] | 891 | .mount = cifs_do_mount, |
Al Viro | 6d68617 | 2011-06-17 08:34:57 -0400 | [diff] [blame] | 892 | .kill_sb = cifs_kill_sb, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 893 | /* .fs_flags */ |
| 894 | }; |
Eric W. Biederman | 3e64fe5 | 2013-03-11 07:05:42 -0700 | [diff] [blame] | 895 | MODULE_ALIAS_FS("cifs"); |
Arjan van de Ven | 754661f | 2007-02-12 00:55:38 -0800 | [diff] [blame] | 896 | const struct inode_operations cifs_dir_inode_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 897 | .create = cifs_create, |
Miklos Szeredi | d2c1271 | 2012-06-05 15:10:23 +0200 | [diff] [blame] | 898 | .atomic_open = cifs_atomic_open, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 899 | .lookup = cifs_lookup, |
| 900 | .getattr = cifs_getattr, |
| 901 | .unlink = cifs_unlink, |
| 902 | .link = cifs_hardlink, |
| 903 | .mkdir = cifs_mkdir, |
| 904 | .rmdir = cifs_rmdir, |
Miklos Szeredi | 2773bf0 | 2016-09-27 11:03:58 +0200 | [diff] [blame] | 905 | .rename = cifs_rename2, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 906 | .permission = cifs_permission, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 907 | .setattr = cifs_setattr, |
| 908 | .symlink = cifs_symlink, |
| 909 | .mknod = cifs_mknod, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 910 | .listxattr = cifs_listxattr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 911 | }; |
| 912 | |
Arjan van de Ven | 754661f | 2007-02-12 00:55:38 -0800 | [diff] [blame] | 913 | const struct inode_operations cifs_file_inode_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 914 | .setattr = cifs_setattr, |
Steve French | 48a77aa | 2016-05-18 20:48:32 -0500 | [diff] [blame] | 915 | .getattr = cifs_getattr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 916 | .permission = cifs_permission, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 917 | .listxattr = cifs_listxattr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 918 | }; |
| 919 | |
Arjan van de Ven | 754661f | 2007-02-12 00:55:38 -0800 | [diff] [blame] | 920 | const struct inode_operations cifs_symlink_inode_ops = { |
Al Viro | 6b25539 | 2015-11-17 10:20:54 -0500 | [diff] [blame] | 921 | .get_link = cifs_get_link, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 922 | .permission = cifs_permission, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 923 | .listxattr = cifs_listxattr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 924 | }; |
| 925 | |
Christoph Hellwig | 04b38d6 | 2015-12-03 12:59:50 +0100 | [diff] [blame] | 926 | static int cifs_clone_file_range(struct file *src_file, loff_t off, |
| 927 | struct file *dst_file, loff_t destoff, u64 len) |
| 928 | { |
| 929 | struct inode *src_inode = file_inode(src_file); |
| 930 | struct inode *target_inode = file_inode(dst_file); |
| 931 | struct cifsFileInfo *smb_file_src = src_file->private_data; |
| 932 | struct cifsFileInfo *smb_file_target = dst_file->private_data; |
Christoph Hellwig | 04b38d6 | 2015-12-03 12:59:50 +0100 | [diff] [blame] | 933 | struct cifs_tcon *target_tcon = tlink_tcon(smb_file_target->tlink); |
| 934 | unsigned int xid; |
| 935 | int rc; |
| 936 | |
| 937 | cifs_dbg(FYI, "clone range\n"); |
| 938 | |
| 939 | xid = get_xid(); |
| 940 | |
| 941 | if (!src_file->private_data || !dst_file->private_data) { |
| 942 | rc = -EBADF; |
| 943 | cifs_dbg(VFS, "missing cifsFileInfo on copy range src file\n"); |
| 944 | goto out; |
| 945 | } |
| 946 | |
| 947 | /* |
| 948 | * Note: cifs case is easier than btrfs since server responsible for |
| 949 | * checks for proper open modes and file type and if it wants |
| 950 | * server could even support copy of range where source = target |
| 951 | */ |
| 952 | lock_two_nondirectories(target_inode, src_inode); |
| 953 | |
| 954 | if (len == 0) |
| 955 | len = src_inode->i_size - off; |
| 956 | |
| 957 | cifs_dbg(FYI, "about to flush pages\n"); |
| 958 | /* should we flush first and last page first */ |
| 959 | truncate_inode_pages_range(&target_inode->i_data, destoff, |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 960 | PAGE_ALIGN(destoff + len)-1); |
Christoph Hellwig | 04b38d6 | 2015-12-03 12:59:50 +0100 | [diff] [blame] | 961 | |
| 962 | if (target_tcon->ses->server->ops->duplicate_extents) |
| 963 | rc = target_tcon->ses->server->ops->duplicate_extents(xid, |
| 964 | smb_file_src, smb_file_target, off, len, destoff); |
| 965 | else |
| 966 | rc = -EOPNOTSUPP; |
| 967 | |
| 968 | /* force revalidate of size and timestamps of target file now |
| 969 | that target is updated on the server */ |
| 970 | CIFS_I(target_inode)->time = 0; |
Christoph Hellwig | 04b38d6 | 2015-12-03 12:59:50 +0100 | [diff] [blame] | 971 | /* although unlocking in the reverse order from locking is not |
| 972 | strictly necessary here it is a little cleaner to be consistent */ |
| 973 | unlock_two_nondirectories(src_inode, target_inode); |
| 974 | out: |
| 975 | free_xid(xid); |
| 976 | return rc; |
| 977 | } |
| 978 | |
Sachin Prabhu | 620d874 | 2017-02-10 16:03:51 +0530 | [diff] [blame] | 979 | ssize_t cifs_file_copychunk_range(unsigned int xid, |
| 980 | struct file *src_file, loff_t off, |
| 981 | struct file *dst_file, loff_t destoff, |
| 982 | size_t len, unsigned int flags) |
| 983 | { |
| 984 | struct inode *src_inode = file_inode(src_file); |
| 985 | struct inode *target_inode = file_inode(dst_file); |
| 986 | struct cifsFileInfo *smb_file_src; |
| 987 | struct cifsFileInfo *smb_file_target; |
| 988 | struct cifs_tcon *src_tcon; |
| 989 | struct cifs_tcon *target_tcon; |
| 990 | ssize_t rc; |
| 991 | |
| 992 | cifs_dbg(FYI, "copychunk range\n"); |
| 993 | |
| 994 | if (src_inode == target_inode) { |
| 995 | rc = -EINVAL; |
| 996 | goto out; |
| 997 | } |
| 998 | |
| 999 | if (!src_file->private_data || !dst_file->private_data) { |
| 1000 | rc = -EBADF; |
| 1001 | cifs_dbg(VFS, "missing cifsFileInfo on copy range src file\n"); |
| 1002 | goto out; |
| 1003 | } |
| 1004 | |
| 1005 | rc = -EXDEV; |
| 1006 | smb_file_target = dst_file->private_data; |
| 1007 | smb_file_src = src_file->private_data; |
| 1008 | src_tcon = tlink_tcon(smb_file_src->tlink); |
| 1009 | target_tcon = tlink_tcon(smb_file_target->tlink); |
| 1010 | |
| 1011 | if (src_tcon->ses != target_tcon->ses) { |
| 1012 | cifs_dbg(VFS, "source and target of copy not on same server\n"); |
| 1013 | goto out; |
| 1014 | } |
| 1015 | |
| 1016 | /* |
| 1017 | * Note: cifs case is easier than btrfs since server responsible for |
| 1018 | * checks for proper open modes and file type and if it wants |
| 1019 | * server could even support copy of range where source = target |
| 1020 | */ |
| 1021 | lock_two_nondirectories(target_inode, src_inode); |
| 1022 | |
| 1023 | cifs_dbg(FYI, "about to flush pages\n"); |
| 1024 | /* should we flush first and last page first */ |
| 1025 | truncate_inode_pages(&target_inode->i_data, 0); |
| 1026 | |
| 1027 | if (target_tcon->ses->server->ops->copychunk_range) |
| 1028 | rc = target_tcon->ses->server->ops->copychunk_range(xid, |
| 1029 | smb_file_src, smb_file_target, off, len, destoff); |
| 1030 | else |
| 1031 | rc = -EOPNOTSUPP; |
| 1032 | |
| 1033 | /* force revalidate of size and timestamps of target file now |
| 1034 | * that target is updated on the server |
| 1035 | */ |
| 1036 | CIFS_I(target_inode)->time = 0; |
| 1037 | /* although unlocking in the reverse order from locking is not |
| 1038 | * strictly necessary here it is a little cleaner to be consistent |
| 1039 | */ |
| 1040 | unlock_two_nondirectories(src_inode, target_inode); |
| 1041 | |
| 1042 | out: |
| 1043 | return rc; |
| 1044 | } |
| 1045 | |
| 1046 | static ssize_t cifs_copy_file_range(struct file *src_file, loff_t off, |
| 1047 | struct file *dst_file, loff_t destoff, |
| 1048 | size_t len, unsigned int flags) |
| 1049 | { |
| 1050 | unsigned int xid = get_xid(); |
| 1051 | ssize_t rc; |
| 1052 | |
| 1053 | rc = cifs_file_copychunk_range(xid, src_file, off, dst_file, destoff, |
| 1054 | len, flags); |
| 1055 | free_xid(xid); |
| 1056 | return rc; |
| 1057 | } |
| 1058 | |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 1059 | const struct file_operations cifs_file_ops = { |
Jeff Layton | 08bc035 | 2014-05-23 06:50:21 -0400 | [diff] [blame] | 1060 | .read_iter = cifs_loose_read_iter, |
Al Viro | 3dae875 | 2014-04-03 12:05:17 -0400 | [diff] [blame] | 1061 | .write_iter = cifs_file_write_iter, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1062 | .open = cifs_open, |
| 1063 | .release = cifs_close, |
| 1064 | .lock = cifs_lock, |
| 1065 | .fsync = cifs_fsync, |
| 1066 | .flush = cifs_flush, |
| 1067 | .mmap = cifs_file_mmap, |
Jens Axboe | 5ffc4ef | 2007-06-01 11:49:19 +0200 | [diff] [blame] | 1068 | .splice_read = generic_file_splice_read, |
Steve French | c32a0b6 | 2006-01-12 14:41:28 -0800 | [diff] [blame] | 1069 | .llseek = cifs_llseek, |
Steve French | f9ddcca | 2008-05-15 05:51:55 +0000 | [diff] [blame] | 1070 | .unlocked_ioctl = cifs_ioctl, |
Sachin Prabhu | 620d874 | 2017-02-10 16:03:51 +0530 | [diff] [blame] | 1071 | .copy_file_range = cifs_copy_file_range, |
Christoph Hellwig | 04b38d6 | 2015-12-03 12:59:50 +0100 | [diff] [blame] | 1072 | .clone_file_range = cifs_clone_file_range, |
Steve French | 84210e9 | 2008-10-23 04:42:37 +0000 | [diff] [blame] | 1073 | .setlease = cifs_setlease, |
Steve French | 31742c5 | 2014-08-17 08:38:47 -0500 | [diff] [blame] | 1074 | .fallocate = cifs_fallocate, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1075 | }; |
| 1076 | |
Pavel Shilovsky | 8be7e6b | 2010-12-12 13:11:13 +0300 | [diff] [blame] | 1077 | const struct file_operations cifs_file_strict_ops = { |
Al Viro | e6a7bcb | 2014-04-02 19:53:36 -0400 | [diff] [blame] | 1078 | .read_iter = cifs_strict_readv, |
Al Viro | 3dae875 | 2014-04-03 12:05:17 -0400 | [diff] [blame] | 1079 | .write_iter = cifs_strict_writev, |
Pavel Shilovsky | 8be7e6b | 2010-12-12 13:11:13 +0300 | [diff] [blame] | 1080 | .open = cifs_open, |
| 1081 | .release = cifs_close, |
| 1082 | .lock = cifs_lock, |
| 1083 | .fsync = cifs_strict_fsync, |
| 1084 | .flush = cifs_flush, |
Pavel Shilovsky | 7a6a19b | 2010-12-14 11:29:51 +0300 | [diff] [blame] | 1085 | .mmap = cifs_file_strict_mmap, |
Pavel Shilovsky | 8be7e6b | 2010-12-12 13:11:13 +0300 | [diff] [blame] | 1086 | .splice_read = generic_file_splice_read, |
| 1087 | .llseek = cifs_llseek, |
Pavel Shilovsky | 8be7e6b | 2010-12-12 13:11:13 +0300 | [diff] [blame] | 1088 | .unlocked_ioctl = cifs_ioctl, |
Sachin Prabhu | 620d874 | 2017-02-10 16:03:51 +0530 | [diff] [blame] | 1089 | .copy_file_range = cifs_copy_file_range, |
Christoph Hellwig | 04b38d6 | 2015-12-03 12:59:50 +0100 | [diff] [blame] | 1090 | .clone_file_range = cifs_clone_file_range, |
Pavel Shilovsky | 8be7e6b | 2010-12-12 13:11:13 +0300 | [diff] [blame] | 1091 | .setlease = cifs_setlease, |
Steve French | 31742c5 | 2014-08-17 08:38:47 -0500 | [diff] [blame] | 1092 | .fallocate = cifs_fallocate, |
Pavel Shilovsky | 8be7e6b | 2010-12-12 13:11:13 +0300 | [diff] [blame] | 1093 | }; |
| 1094 | |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 1095 | const struct file_operations cifs_file_direct_ops = { |
Pavel Shilovsky | 0b81c1c | 2011-03-10 10:11:05 +0300 | [diff] [blame] | 1096 | /* BB reevaluate whether they can be done with directio, no cache */ |
Al Viro | e6a7bcb | 2014-04-02 19:53:36 -0400 | [diff] [blame] | 1097 | .read_iter = cifs_user_readv, |
Al Viro | 3dae875 | 2014-04-03 12:05:17 -0400 | [diff] [blame] | 1098 | .write_iter = cifs_user_writev, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1099 | .open = cifs_open, |
| 1100 | .release = cifs_close, |
| 1101 | .lock = cifs_lock, |
| 1102 | .fsync = cifs_fsync, |
| 1103 | .flush = cifs_flush, |
Steve French | a994b8f | 2009-12-07 05:44:46 +0000 | [diff] [blame] | 1104 | .mmap = cifs_file_mmap, |
Jens Axboe | 5ffc4ef | 2007-06-01 11:49:19 +0200 | [diff] [blame] | 1105 | .splice_read = generic_file_splice_read, |
Steve French | f9ddcca | 2008-05-15 05:51:55 +0000 | [diff] [blame] | 1106 | .unlocked_ioctl = cifs_ioctl, |
Sachin Prabhu | 620d874 | 2017-02-10 16:03:51 +0530 | [diff] [blame] | 1107 | .copy_file_range = cifs_copy_file_range, |
Christoph Hellwig | 04b38d6 | 2015-12-03 12:59:50 +0100 | [diff] [blame] | 1108 | .clone_file_range = cifs_clone_file_range, |
Steve French | c32a0b6 | 2006-01-12 14:41:28 -0800 | [diff] [blame] | 1109 | .llseek = cifs_llseek, |
Steve French | 84210e9 | 2008-10-23 04:42:37 +0000 | [diff] [blame] | 1110 | .setlease = cifs_setlease, |
Steve French | 31742c5 | 2014-08-17 08:38:47 -0500 | [diff] [blame] | 1111 | .fallocate = cifs_fallocate, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1112 | }; |
Pavel Shilovsky | 8be7e6b | 2010-12-12 13:11:13 +0300 | [diff] [blame] | 1113 | |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 1114 | const struct file_operations cifs_file_nobrl_ops = { |
Jeff Layton | 08bc035 | 2014-05-23 06:50:21 -0400 | [diff] [blame] | 1115 | .read_iter = cifs_loose_read_iter, |
Al Viro | 3dae875 | 2014-04-03 12:05:17 -0400 | [diff] [blame] | 1116 | .write_iter = cifs_file_write_iter, |
Steve French | 87c89dd | 2005-11-17 17:03:00 -0800 | [diff] [blame] | 1117 | .open = cifs_open, |
| 1118 | .release = cifs_close, |
| 1119 | .fsync = cifs_fsync, |
| 1120 | .flush = cifs_flush, |
| 1121 | .mmap = cifs_file_mmap, |
Jens Axboe | 5ffc4ef | 2007-06-01 11:49:19 +0200 | [diff] [blame] | 1122 | .splice_read = generic_file_splice_read, |
Steve French | c32a0b6 | 2006-01-12 14:41:28 -0800 | [diff] [blame] | 1123 | .llseek = cifs_llseek, |
Steve French | f9ddcca | 2008-05-15 05:51:55 +0000 | [diff] [blame] | 1124 | .unlocked_ioctl = cifs_ioctl, |
Sachin Prabhu | 620d874 | 2017-02-10 16:03:51 +0530 | [diff] [blame] | 1125 | .copy_file_range = cifs_copy_file_range, |
Christoph Hellwig | 04b38d6 | 2015-12-03 12:59:50 +0100 | [diff] [blame] | 1126 | .clone_file_range = cifs_clone_file_range, |
Steve French | 84210e9 | 2008-10-23 04:42:37 +0000 | [diff] [blame] | 1127 | .setlease = cifs_setlease, |
Steve French | 31742c5 | 2014-08-17 08:38:47 -0500 | [diff] [blame] | 1128 | .fallocate = cifs_fallocate, |
Steve French | 8b94bcb | 2005-11-11 11:41:00 -0800 | [diff] [blame] | 1129 | }; |
| 1130 | |
Pavel Shilovsky | 8be7e6b | 2010-12-12 13:11:13 +0300 | [diff] [blame] | 1131 | const struct file_operations cifs_file_strict_nobrl_ops = { |
Al Viro | e6a7bcb | 2014-04-02 19:53:36 -0400 | [diff] [blame] | 1132 | .read_iter = cifs_strict_readv, |
Al Viro | 3dae875 | 2014-04-03 12:05:17 -0400 | [diff] [blame] | 1133 | .write_iter = cifs_strict_writev, |
Pavel Shilovsky | 8be7e6b | 2010-12-12 13:11:13 +0300 | [diff] [blame] | 1134 | .open = cifs_open, |
| 1135 | .release = cifs_close, |
| 1136 | .fsync = cifs_strict_fsync, |
| 1137 | .flush = cifs_flush, |
Pavel Shilovsky | 7a6a19b | 2010-12-14 11:29:51 +0300 | [diff] [blame] | 1138 | .mmap = cifs_file_strict_mmap, |
Pavel Shilovsky | 8be7e6b | 2010-12-12 13:11:13 +0300 | [diff] [blame] | 1139 | .splice_read = generic_file_splice_read, |
| 1140 | .llseek = cifs_llseek, |
Pavel Shilovsky | 8be7e6b | 2010-12-12 13:11:13 +0300 | [diff] [blame] | 1141 | .unlocked_ioctl = cifs_ioctl, |
Sachin Prabhu | 620d874 | 2017-02-10 16:03:51 +0530 | [diff] [blame] | 1142 | .copy_file_range = cifs_copy_file_range, |
Christoph Hellwig | 04b38d6 | 2015-12-03 12:59:50 +0100 | [diff] [blame] | 1143 | .clone_file_range = cifs_clone_file_range, |
Pavel Shilovsky | 8be7e6b | 2010-12-12 13:11:13 +0300 | [diff] [blame] | 1144 | .setlease = cifs_setlease, |
Steve French | 31742c5 | 2014-08-17 08:38:47 -0500 | [diff] [blame] | 1145 | .fallocate = cifs_fallocate, |
Pavel Shilovsky | 8be7e6b | 2010-12-12 13:11:13 +0300 | [diff] [blame] | 1146 | }; |
| 1147 | |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 1148 | const struct file_operations cifs_file_direct_nobrl_ops = { |
Pavel Shilovsky | 0b81c1c | 2011-03-10 10:11:05 +0300 | [diff] [blame] | 1149 | /* BB reevaluate whether they can be done with directio, no cache */ |
Al Viro | e6a7bcb | 2014-04-02 19:53:36 -0400 | [diff] [blame] | 1150 | .read_iter = cifs_user_readv, |
Al Viro | 3dae875 | 2014-04-03 12:05:17 -0400 | [diff] [blame] | 1151 | .write_iter = cifs_user_writev, |
Steve French | 87c89dd | 2005-11-17 17:03:00 -0800 | [diff] [blame] | 1152 | .open = cifs_open, |
| 1153 | .release = cifs_close, |
| 1154 | .fsync = cifs_fsync, |
| 1155 | .flush = cifs_flush, |
Pavel Shilovsky | 810627a0 | 2010-03-27 02:00:49 +0000 | [diff] [blame] | 1156 | .mmap = cifs_file_mmap, |
Jens Axboe | 5ffc4ef | 2007-06-01 11:49:19 +0200 | [diff] [blame] | 1157 | .splice_read = generic_file_splice_read, |
Steve French | f9ddcca | 2008-05-15 05:51:55 +0000 | [diff] [blame] | 1158 | .unlocked_ioctl = cifs_ioctl, |
Sachin Prabhu | 620d874 | 2017-02-10 16:03:51 +0530 | [diff] [blame] | 1159 | .copy_file_range = cifs_copy_file_range, |
Christoph Hellwig | 04b38d6 | 2015-12-03 12:59:50 +0100 | [diff] [blame] | 1160 | .clone_file_range = cifs_clone_file_range, |
Steve French | c32a0b6 | 2006-01-12 14:41:28 -0800 | [diff] [blame] | 1161 | .llseek = cifs_llseek, |
Steve French | 84210e9 | 2008-10-23 04:42:37 +0000 | [diff] [blame] | 1162 | .setlease = cifs_setlease, |
Steve French | 31742c5 | 2014-08-17 08:38:47 -0500 | [diff] [blame] | 1163 | .fallocate = cifs_fallocate, |
Steve French | 8b94bcb | 2005-11-11 11:41:00 -0800 | [diff] [blame] | 1164 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1165 | |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 1166 | const struct file_operations cifs_dir_ops = { |
Al Viro | 3125d26 | 2016-04-20 17:40:47 -0400 | [diff] [blame] | 1167 | .iterate_shared = cifs_readdir, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1168 | .release = cifs_closedir, |
| 1169 | .read = generic_read_dir, |
Steve French | f9ddcca | 2008-05-15 05:51:55 +0000 | [diff] [blame] | 1170 | .unlocked_ioctl = cifs_ioctl, |
Sachin Prabhu | 620d874 | 2017-02-10 16:03:51 +0530 | [diff] [blame] | 1171 | .copy_file_range = cifs_copy_file_range, |
Christoph Hellwig | 04b38d6 | 2015-12-03 12:59:50 +0100 | [diff] [blame] | 1172 | .clone_file_range = cifs_clone_file_range, |
Christoph Hellwig | 3222a3e | 2008-09-03 21:53:01 +0200 | [diff] [blame] | 1173 | .llseek = generic_file_llseek, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1174 | }; |
| 1175 | |
| 1176 | static void |
Alexey Dobriyan | 51cc506 | 2008-07-25 19:45:34 -0700 | [diff] [blame] | 1177 | cifs_init_once(void *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1178 | { |
| 1179 | struct cifsInodeInfo *cifsi = inode; |
| 1180 | |
Christoph Lameter | a35afb8 | 2007-05-16 22:10:57 -0700 | [diff] [blame] | 1181 | inode_init_once(&cifsi->vfs_inode); |
Pavel Shilovsky | 1b4b55a | 2012-09-19 06:22:44 -0700 | [diff] [blame] | 1182 | init_rwsem(&cifsi->lock_sem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1183 | } |
| 1184 | |
Fabian Frederick | 9ee108b | 2014-04-03 14:46:30 -0700 | [diff] [blame] | 1185 | static int __init |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1186 | cifs_init_inodecache(void) |
| 1187 | { |
| 1188 | cifs_inode_cachep = kmem_cache_create("cifs_inode_cache", |
Steve French | 26f5736 | 2007-08-30 22:09:15 +0000 | [diff] [blame] | 1189 | sizeof(struct cifsInodeInfo), |
Paul Jackson | fffb60f | 2006-03-24 03:16:06 -0800 | [diff] [blame] | 1190 | 0, (SLAB_RECLAIM_ACCOUNT| |
Vladimir Davydov | 5d09705 | 2016-01-14 15:18:21 -0800 | [diff] [blame] | 1191 | SLAB_MEM_SPREAD|SLAB_ACCOUNT), |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 1192 | cifs_init_once); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1193 | if (cifs_inode_cachep == NULL) |
| 1194 | return -ENOMEM; |
| 1195 | |
| 1196 | return 0; |
| 1197 | } |
| 1198 | |
| 1199 | static void |
| 1200 | cifs_destroy_inodecache(void) |
| 1201 | { |
Kirill A. Shutemov | 8c0a853 | 2012-09-26 11:33:07 +1000 | [diff] [blame] | 1202 | /* |
| 1203 | * Make sure all delayed rcu free inodes are flushed before we |
| 1204 | * destroy cache. |
| 1205 | */ |
| 1206 | rcu_barrier(); |
Alexey Dobriyan | 1a1d92c | 2006-09-27 01:49:40 -0700 | [diff] [blame] | 1207 | kmem_cache_destroy(cifs_inode_cachep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1208 | } |
| 1209 | |
| 1210 | static int |
| 1211 | cifs_init_request_bufs(void) |
| 1212 | { |
Pavel Shilovsky | 3792c17 | 2012-01-12 22:40:50 +0400 | [diff] [blame] | 1213 | /* |
| 1214 | * SMB2 maximum header size is bigger than CIFS one - no problems to |
| 1215 | * allocate some more bytes for CIFS. |
| 1216 | */ |
Steve French | 2a38e12 | 2017-07-08 18:48:15 -0500 | [diff] [blame] | 1217 | size_t max_hdr_size = MAX_SMB2_HDR_SIZE; |
| 1218 | |
Steve French | 4523cc3 | 2007-04-30 20:13:06 +0000 | [diff] [blame] | 1219 | if (CIFSMaxBufSize < 8192) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1220 | /* Buffer size can not be smaller than 2 * PATH_MAX since maximum |
| 1221 | Unicode path name has to fit in any SMB/CIFS path based frames */ |
| 1222 | CIFSMaxBufSize = 8192; |
| 1223 | } else if (CIFSMaxBufSize > 1024*127) { |
| 1224 | CIFSMaxBufSize = 1024 * 127; |
| 1225 | } else { |
| 1226 | CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/ |
| 1227 | } |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1228 | /* |
| 1229 | cifs_dbg(VFS, "CIFSMaxBufSize %d 0x%x\n", |
| 1230 | CIFSMaxBufSize, CIFSMaxBufSize); |
| 1231 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1232 | cifs_req_cachep = kmem_cache_create("cifs_request", |
Pavel Shilovsky | 3792c17 | 2012-01-12 22:40:50 +0400 | [diff] [blame] | 1233 | CIFSMaxBufSize + max_hdr_size, 0, |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 1234 | SLAB_HWCACHE_ALIGN, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1235 | if (cifs_req_cachep == NULL) |
| 1236 | return -ENOMEM; |
| 1237 | |
Steve French | 4523cc3 | 2007-04-30 20:13:06 +0000 | [diff] [blame] | 1238 | if (cifs_min_rcv < 1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1239 | cifs_min_rcv = 1; |
| 1240 | else if (cifs_min_rcv > 64) { |
| 1241 | cifs_min_rcv = 64; |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1242 | cifs_dbg(VFS, "cifs_min_rcv set to maximum (64)\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1243 | } |
| 1244 | |
Matthew Dobson | 93d2341 | 2006-03-26 01:37:50 -0800 | [diff] [blame] | 1245 | cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv, |
| 1246 | cifs_req_cachep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1247 | |
Steve French | 4523cc3 | 2007-04-30 20:13:06 +0000 | [diff] [blame] | 1248 | if (cifs_req_poolp == NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1249 | kmem_cache_destroy(cifs_req_cachep); |
| 1250 | return -ENOMEM; |
| 1251 | } |
Steve French | ec637e3 | 2005-12-12 20:53:18 -0800 | [diff] [blame] | 1252 | /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1253 | almost all handle based requests (but not write response, nor is it |
| 1254 | sufficient for path based requests). A smaller size would have |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1255 | been more efficient (compacting multiple slab items on one 4k page) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1256 | for the case in which debug was on, but this larger size allows |
| 1257 | more SMBs to use small buffer alloc and is still much more |
Steve French | 6dc0f87 | 2007-07-06 23:13:06 +0000 | [diff] [blame] | 1258 | efficient to alloc 1 per page off the slab compared to 17K (5page) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1259 | alloc of large cifs buffers even when page debugging is on */ |
| 1260 | cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq", |
Steve French | 6dc0f87 | 2007-07-06 23:13:06 +0000 | [diff] [blame] | 1261 | MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN, |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 1262 | NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1263 | if (cifs_sm_req_cachep == NULL) { |
| 1264 | mempool_destroy(cifs_req_poolp); |
| 1265 | kmem_cache_destroy(cifs_req_cachep); |
Steve French | 6dc0f87 | 2007-07-06 23:13:06 +0000 | [diff] [blame] | 1266 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1267 | } |
| 1268 | |
Steve French | 4523cc3 | 2007-04-30 20:13:06 +0000 | [diff] [blame] | 1269 | if (cifs_min_small < 2) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1270 | cifs_min_small = 2; |
| 1271 | else if (cifs_min_small > 256) { |
| 1272 | cifs_min_small = 256; |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1273 | cifs_dbg(FYI, "cifs_min_small set to maximum (256)\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1274 | } |
| 1275 | |
Matthew Dobson | 93d2341 | 2006-03-26 01:37:50 -0800 | [diff] [blame] | 1276 | cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small, |
| 1277 | cifs_sm_req_cachep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1278 | |
Steve French | 4523cc3 | 2007-04-30 20:13:06 +0000 | [diff] [blame] | 1279 | if (cifs_sm_req_poolp == NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1280 | mempool_destroy(cifs_req_poolp); |
| 1281 | kmem_cache_destroy(cifs_req_cachep); |
| 1282 | kmem_cache_destroy(cifs_sm_req_cachep); |
| 1283 | return -ENOMEM; |
| 1284 | } |
| 1285 | |
| 1286 | return 0; |
| 1287 | } |
| 1288 | |
| 1289 | static void |
| 1290 | cifs_destroy_request_bufs(void) |
| 1291 | { |
| 1292 | mempool_destroy(cifs_req_poolp); |
Alexey Dobriyan | 1a1d92c | 2006-09-27 01:49:40 -0700 | [diff] [blame] | 1293 | kmem_cache_destroy(cifs_req_cachep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1294 | mempool_destroy(cifs_sm_req_poolp); |
Alexey Dobriyan | 1a1d92c | 2006-09-27 01:49:40 -0700 | [diff] [blame] | 1295 | kmem_cache_destroy(cifs_sm_req_cachep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1296 | } |
| 1297 | |
| 1298 | static int |
| 1299 | cifs_init_mids(void) |
| 1300 | { |
| 1301 | cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids", |
Steve French | 26f5736 | 2007-08-30 22:09:15 +0000 | [diff] [blame] | 1302 | sizeof(struct mid_q_entry), 0, |
| 1303 | SLAB_HWCACHE_ALIGN, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1304 | if (cifs_mid_cachep == NULL) |
| 1305 | return -ENOMEM; |
| 1306 | |
Matthew Dobson | 93d2341 | 2006-03-26 01:37:50 -0800 | [diff] [blame] | 1307 | /* 3 is a reasonable minimum number of simultaneous operations */ |
| 1308 | cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep); |
Steve French | 4523cc3 | 2007-04-30 20:13:06 +0000 | [diff] [blame] | 1309 | if (cifs_mid_poolp == NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1310 | kmem_cache_destroy(cifs_mid_cachep); |
| 1311 | return -ENOMEM; |
| 1312 | } |
| 1313 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1314 | return 0; |
| 1315 | } |
| 1316 | |
| 1317 | static void |
| 1318 | cifs_destroy_mids(void) |
| 1319 | { |
| 1320 | mempool_destroy(cifs_mid_poolp); |
Alexey Dobriyan | 1a1d92c | 2006-09-27 01:49:40 -0700 | [diff] [blame] | 1321 | kmem_cache_destroy(cifs_mid_cachep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1322 | } |
| 1323 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1324 | static int __init |
| 1325 | init_cifs(void) |
| 1326 | { |
| 1327 | int rc = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1328 | cifs_proc_init(); |
Jeff Layton | e7ddee9 | 2008-11-14 13:44:38 -0500 | [diff] [blame] | 1329 | INIT_LIST_HEAD(&cifs_tcp_ses_list); |
Steve French | 0eff0e2 | 2011-02-24 05:39:23 +0000 | [diff] [blame] | 1330 | #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */ |
Steve French | 4ca9c19 | 2005-10-10 19:52:13 -0700 | [diff] [blame] | 1331 | INIT_LIST_HEAD(&GlobalDnotifyReqList); |
| 1332 | INIT_LIST_HEAD(&GlobalDnotifyRsp_Q); |
Steve French | 0eff0e2 | 2011-02-24 05:39:23 +0000 | [diff] [blame] | 1333 | #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1334 | /* |
| 1335 | * Initialize Global counters |
| 1336 | */ |
| 1337 | atomic_set(&sesInfoAllocCount, 0); |
| 1338 | atomic_set(&tconInfoAllocCount, 0); |
Steve French | 6dc0f87 | 2007-07-06 23:13:06 +0000 | [diff] [blame] | 1339 | atomic_set(&tcpSesAllocCount, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1340 | atomic_set(&tcpSesReconnectCount, 0); |
| 1341 | atomic_set(&tconInfoReconnectCount, 0); |
| 1342 | |
| 1343 | atomic_set(&bufAllocCount, 0); |
Steve French | 4498eed5 | 2005-12-03 13:58:57 -0800 | [diff] [blame] | 1344 | atomic_set(&smBufAllocCount, 0); |
| 1345 | #ifdef CONFIG_CIFS_STATS2 |
| 1346 | atomic_set(&totBufAllocCount, 0); |
| 1347 | atomic_set(&totSmBufAllocCount, 0); |
| 1348 | #endif /* CONFIG_CIFS_STATS2 */ |
| 1349 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1350 | atomic_set(&midCount, 0); |
| 1351 | GlobalCurrentXid = 0; |
| 1352 | GlobalTotalActiveXid = 0; |
| 1353 | GlobalMaxActiveXid = 0; |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 1354 | spin_lock_init(&cifs_tcp_ses_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1355 | spin_lock_init(&GlobalMid_Lock); |
| 1356 | |
Jason A. Donenfeld | 51b0817 | 2017-06-07 20:42:50 -0400 | [diff] [blame] | 1357 | cifs_lock_secret = get_random_u32(); |
Jeff Layton | 3d22462 | 2016-05-24 06:27:44 -0400 | [diff] [blame] | 1358 | |
Steve French | 4523cc3 | 2007-04-30 20:13:06 +0000 | [diff] [blame] | 1359 | if (cifs_max_pending < 2) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1360 | cifs_max_pending = 2; |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1361 | cifs_dbg(FYI, "cifs_max_pending set to min of 2\n"); |
Pavel Shilovsky | 10b9b98 | 2012-03-20 12:55:09 +0300 | [diff] [blame] | 1362 | } else if (cifs_max_pending > CIFS_MAX_REQ) { |
| 1363 | cifs_max_pending = CIFS_MAX_REQ; |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1364 | cifs_dbg(FYI, "cifs_max_pending set to max of %u\n", |
| 1365 | CIFS_MAX_REQ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1366 | } |
| 1367 | |
Jeff Layton | da472fc | 2012-03-23 14:40:53 -0400 | [diff] [blame] | 1368 | cifsiod_wq = alloc_workqueue("cifsiod", WQ_FREEZABLE|WQ_MEM_RECLAIM, 0); |
| 1369 | if (!cifsiod_wq) { |
| 1370 | rc = -ENOMEM; |
| 1371 | goto out_clean_proc; |
| 1372 | } |
| 1373 | |
Rabin Vincent | 3998e6b | 2017-05-03 17:54:01 +0200 | [diff] [blame] | 1374 | cifsoplockd_wq = alloc_workqueue("cifsoplockd", |
| 1375 | WQ_FREEZABLE|WQ_MEM_RECLAIM, 0); |
| 1376 | if (!cifsoplockd_wq) { |
| 1377 | rc = -ENOMEM; |
| 1378 | goto out_destroy_cifsiod_wq; |
| 1379 | } |
| 1380 | |
Suresh Jayaraman | f579cf3 | 2010-07-05 18:11:50 +0530 | [diff] [blame] | 1381 | rc = cifs_fscache_register(); |
| 1382 | if (rc) |
Rabin Vincent | 3998e6b | 2017-05-03 17:54:01 +0200 | [diff] [blame] | 1383 | goto out_destroy_cifsoplockd_wq; |
Suresh Jayaraman | f579cf3 | 2010-07-05 18:11:50 +0530 | [diff] [blame] | 1384 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1385 | rc = cifs_init_inodecache(); |
Steve French | 45af7a0 | 2006-04-21 22:52:25 +0000 | [diff] [blame] | 1386 | if (rc) |
Steve French | d3bf522 | 2010-09-22 19:15:36 +0000 | [diff] [blame] | 1387 | goto out_unreg_fscache; |
Steve French | 45af7a0 | 2006-04-21 22:52:25 +0000 | [diff] [blame] | 1388 | |
| 1389 | rc = cifs_init_mids(); |
| 1390 | if (rc) |
| 1391 | goto out_destroy_inodecache; |
| 1392 | |
| 1393 | rc = cifs_init_request_bufs(); |
| 1394 | if (rc) |
| 1395 | goto out_destroy_mids; |
| 1396 | |
Jeff Layton | 84a15b9 | 2007-11-03 05:02:24 +0000 | [diff] [blame] | 1397 | #ifdef CONFIG_CIFS_UPCALL |
Sachin Prabhu | b74cb9a | 2016-05-17 18:20:13 -0500 | [diff] [blame] | 1398 | rc = init_cifs_spnego(); |
Jeff Layton | 84a15b9 | 2007-11-03 05:02:24 +0000 | [diff] [blame] | 1399 | if (rc) |
Shirish Pargaonkar | 4d79dba | 2011-04-27 23:34:35 -0500 | [diff] [blame] | 1400 | goto out_destroy_request_bufs; |
| 1401 | #endif /* CONFIG_CIFS_UPCALL */ |
| 1402 | |
| 1403 | #ifdef CONFIG_CIFS_ACL |
| 1404 | rc = init_cifs_idmap(); |
| 1405 | if (rc) |
Shirish Pargaonkar | c4aca0c | 2011-05-06 02:35:00 -0500 | [diff] [blame] | 1406 | goto out_register_key_type; |
Shirish Pargaonkar | 4d79dba | 2011-04-27 23:34:35 -0500 | [diff] [blame] | 1407 | #endif /* CONFIG_CIFS_ACL */ |
| 1408 | |
| 1409 | rc = register_filesystem(&cifs_fs_type); |
| 1410 | if (rc) |
Shirish Pargaonkar | c4aca0c | 2011-05-06 02:35:00 -0500 | [diff] [blame] | 1411 | goto out_init_cifs_idmap; |
Steve French | 45af7a0 | 2006-04-21 22:52:25 +0000 | [diff] [blame] | 1412 | |
Steve French | 45af7a0 | 2006-04-21 22:52:25 +0000 | [diff] [blame] | 1413 | return 0; |
| 1414 | |
Shirish Pargaonkar | c4aca0c | 2011-05-06 02:35:00 -0500 | [diff] [blame] | 1415 | out_init_cifs_idmap: |
Shirish Pargaonkar | 4d79dba | 2011-04-27 23:34:35 -0500 | [diff] [blame] | 1416 | #ifdef CONFIG_CIFS_ACL |
| 1417 | exit_cifs_idmap(); |
Shirish Pargaonkar | c4aca0c | 2011-05-06 02:35:00 -0500 | [diff] [blame] | 1418 | out_register_key_type: |
Shirish Pargaonkar | 4d79dba | 2011-04-27 23:34:35 -0500 | [diff] [blame] | 1419 | #endif |
| 1420 | #ifdef CONFIG_CIFS_UPCALL |
Sachin Prabhu | b74cb9a | 2016-05-17 18:20:13 -0500 | [diff] [blame] | 1421 | exit_cifs_spnego(); |
Shirish Pargaonkar | c4aca0c | 2011-05-06 02:35:00 -0500 | [diff] [blame] | 1422 | out_destroy_request_bufs: |
Shirish Pargaonkar | 4d79dba | 2011-04-27 23:34:35 -0500 | [diff] [blame] | 1423 | #endif |
Steve French | 45af7a0 | 2006-04-21 22:52:25 +0000 | [diff] [blame] | 1424 | cifs_destroy_request_bufs(); |
Steve French | d3bf522 | 2010-09-22 19:15:36 +0000 | [diff] [blame] | 1425 | out_destroy_mids: |
Steve French | 45af7a0 | 2006-04-21 22:52:25 +0000 | [diff] [blame] | 1426 | cifs_destroy_mids(); |
Steve French | d3bf522 | 2010-09-22 19:15:36 +0000 | [diff] [blame] | 1427 | out_destroy_inodecache: |
Steve French | 45af7a0 | 2006-04-21 22:52:25 +0000 | [diff] [blame] | 1428 | cifs_destroy_inodecache(); |
Steve French | d3bf522 | 2010-09-22 19:15:36 +0000 | [diff] [blame] | 1429 | out_unreg_fscache: |
Suresh Jayaraman | f579cf3 | 2010-07-05 18:11:50 +0530 | [diff] [blame] | 1430 | cifs_fscache_unregister(); |
Rabin Vincent | 3998e6b | 2017-05-03 17:54:01 +0200 | [diff] [blame] | 1431 | out_destroy_cifsoplockd_wq: |
| 1432 | destroy_workqueue(cifsoplockd_wq); |
| 1433 | out_destroy_cifsiod_wq: |
Jeff Layton | da472fc | 2012-03-23 14:40:53 -0400 | [diff] [blame] | 1434 | destroy_workqueue(cifsiod_wq); |
Steve French | d3bf522 | 2010-09-22 19:15:36 +0000 | [diff] [blame] | 1435 | out_clean_proc: |
| 1436 | cifs_proc_clean(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1437 | return rc; |
| 1438 | } |
| 1439 | |
| 1440 | static void __exit |
| 1441 | exit_cifs(void) |
| 1442 | { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1443 | cifs_dbg(NOISY, "exit_cifs\n"); |
Jeff Layton | 3dd9330 | 2012-03-21 06:27:55 -0400 | [diff] [blame] | 1444 | unregister_filesystem(&cifs_fs_type); |
Igor Mammedov | 78d31a3 | 2008-04-24 12:56:07 +0400 | [diff] [blame] | 1445 | cifs_dfs_release_automount_timer(); |
Shirish Pargaonkar | 4d79dba | 2011-04-27 23:34:35 -0500 | [diff] [blame] | 1446 | #ifdef CONFIG_CIFS_ACL |
Shirish Pargaonkar | 4d79dba | 2011-04-27 23:34:35 -0500 | [diff] [blame] | 1447 | exit_cifs_idmap(); |
| 1448 | #endif |
Jeff Layton | 84a15b9 | 2007-11-03 05:02:24 +0000 | [diff] [blame] | 1449 | #ifdef CONFIG_CIFS_UPCALL |
| 1450 | unregister_key_type(&cifs_spnego_key_type); |
| 1451 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1452 | cifs_destroy_request_bufs(); |
Jeff Layton | 3dd9330 | 2012-03-21 06:27:55 -0400 | [diff] [blame] | 1453 | cifs_destroy_mids(); |
| 1454 | cifs_destroy_inodecache(); |
| 1455 | cifs_fscache_unregister(); |
Rabin Vincent | 3998e6b | 2017-05-03 17:54:01 +0200 | [diff] [blame] | 1456 | destroy_workqueue(cifsoplockd_wq); |
Jeff Layton | da472fc | 2012-03-23 14:40:53 -0400 | [diff] [blame] | 1457 | destroy_workqueue(cifsiod_wq); |
Jeff Layton | 3dd9330 | 2012-03-21 06:27:55 -0400 | [diff] [blame] | 1458 | cifs_proc_clean(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1459 | } |
| 1460 | |
| 1461 | MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>"); |
Steve French | 6dc0f87 | 2007-07-06 23:13:06 +0000 | [diff] [blame] | 1462 | MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1463 | MODULE_DESCRIPTION |
Steve French | 63135e0 | 2007-07-17 17:34:02 +0000 | [diff] [blame] | 1464 | ("VFS to access servers complying with the SNIA CIFS Specification " |
| 1465 | "e.g. Samba and Windows"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1466 | MODULE_VERSION(CIFS_VERSION); |
Jean Delvare | b9be76d | 2017-01-25 16:09:10 +0100 | [diff] [blame] | 1467 | MODULE_SOFTDEP("pre: arc4"); |
| 1468 | MODULE_SOFTDEP("pre: des"); |
| 1469 | MODULE_SOFTDEP("pre: ecb"); |
| 1470 | MODULE_SOFTDEP("pre: hmac"); |
| 1471 | MODULE_SOFTDEP("pre: md4"); |
| 1472 | MODULE_SOFTDEP("pre: md5"); |
| 1473 | MODULE_SOFTDEP("pre: nls"); |
Jean Delvare | b9be76d | 2017-01-25 16:09:10 +0100 | [diff] [blame] | 1474 | MODULE_SOFTDEP("pre: aes"); |
| 1475 | MODULE_SOFTDEP("pre: cmac"); |
| 1476 | MODULE_SOFTDEP("pre: sha256"); |
Pavel Shilovsky | 026e93d | 2016-11-03 16:47:37 -0700 | [diff] [blame] | 1477 | MODULE_SOFTDEP("pre: aead2"); |
| 1478 | MODULE_SOFTDEP("pre: ccm"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1479 | module_init(init_cifs) |
| 1480 | module_exit(exit_cifs) |