Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/fs/9p/vfs_inode.c |
| 3 | * |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 4 | * This file contains vfs inode ops for the 9P2000 protocol. |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 5 | * |
| 6 | * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com> |
| 7 | * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov> |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
Eric Van Hensbergen | 42e8c50 | 2006-03-25 03:07:28 -0800 | [diff] [blame] | 10 | * it under the terms of the GNU General Public License version 2 |
| 11 | * as published by the Free Software Foundation. |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with this program; if not, write to: |
| 20 | * Free Software Foundation |
| 21 | * 51 Franklin Street, Fifth Floor |
| 22 | * Boston, MA 02111-1301 USA |
| 23 | * |
| 24 | */ |
| 25 | |
| 26 | #include <linux/module.h> |
| 27 | #include <linux/errno.h> |
| 28 | #include <linux/fs.h> |
| 29 | #include <linux/file.h> |
| 30 | #include <linux/pagemap.h> |
| 31 | #include <linux/stat.h> |
| 32 | #include <linux/string.h> |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 33 | #include <linux/inet.h> |
| 34 | #include <linux/namei.h> |
| 35 | #include <linux/idr.h> |
Alexey Dobriyan | e8edc6e | 2007-05-21 01:22:52 +0400 | [diff] [blame] | 36 | #include <linux/sched.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 37 | #include <linux/slab.h> |
Aneesh Kumar K.V | ebf4626 | 2010-05-31 13:22:56 +0530 | [diff] [blame] | 38 | #include <linux/xattr.h> |
Aneesh Kumar K.V | 85ff872 | 2010-09-28 00:27:39 +0530 | [diff] [blame] | 39 | #include <linux/posix_acl.h> |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 40 | #include <net/9p/9p.h> |
| 41 | #include <net/9p/client.h> |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 42 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 43 | #include "v9fs.h" |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 44 | #include "v9fs_vfs.h" |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 45 | #include "fid.h" |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 46 | #include "cache.h" |
Aneesh Kumar K.V | ebf4626 | 2010-05-31 13:22:56 +0530 | [diff] [blame] | 47 | #include "xattr.h" |
Aneesh Kumar K.V | 85ff872 | 2010-09-28 00:27:39 +0530 | [diff] [blame] | 48 | #include "acl.h" |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 49 | |
Arjan van de Ven | 754661f | 2007-02-12 00:55:38 -0800 | [diff] [blame] | 50 | static const struct inode_operations v9fs_dir_inode_operations; |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 51 | static const struct inode_operations v9fs_dir_inode_operations_dotu; |
Arjan van de Ven | 754661f | 2007-02-12 00:55:38 -0800 | [diff] [blame] | 52 | static const struct inode_operations v9fs_file_inode_operations; |
| 53 | static const struct inode_operations v9fs_symlink_inode_operations; |
Aneesh Kumar K.V | f5fc614 | 2010-10-12 13:02:25 +0530 | [diff] [blame] | 54 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 55 | /** |
| 56 | * unixmode2p9mode - convert unix mode bits to plan 9 |
| 57 | * @v9ses: v9fs session information |
| 58 | * @mode: mode to convert |
| 59 | * |
| 60 | */ |
| 61 | |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 62 | static int unixmode2p9mode(struct v9fs_session_info *v9ses, int mode) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 63 | { |
| 64 | int res; |
| 65 | res = mode & 0777; |
| 66 | if (S_ISDIR(mode)) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 67 | res |= P9_DMDIR; |
Sripathi Kodi | dd6102f | 2010-03-05 18:48:00 +0000 | [diff] [blame] | 68 | if (v9fs_proto_dotu(v9ses)) { |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 69 | if (S_ISLNK(mode)) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 70 | res |= P9_DMSYMLINK; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 71 | if (v9ses->nodev == 0) { |
| 72 | if (S_ISSOCK(mode)) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 73 | res |= P9_DMSOCKET; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 74 | if (S_ISFIFO(mode)) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 75 | res |= P9_DMNAMEDPIPE; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 76 | if (S_ISBLK(mode)) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 77 | res |= P9_DMDEVICE; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 78 | if (S_ISCHR(mode)) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 79 | res |= P9_DMDEVICE; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 80 | } |
| 81 | |
| 82 | if ((mode & S_ISUID) == S_ISUID) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 83 | res |= P9_DMSETUID; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 84 | if ((mode & S_ISGID) == S_ISGID) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 85 | res |= P9_DMSETGID; |
Anthony Liguori | d199d65 | 2008-02-06 19:25:06 -0600 | [diff] [blame] | 86 | if ((mode & S_ISVTX) == S_ISVTX) |
| 87 | res |= P9_DMSETVTX; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 88 | if ((mode & P9_DMLINK)) |
| 89 | res |= P9_DMLINK; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 90 | } |
| 91 | |
| 92 | return res; |
| 93 | } |
| 94 | |
| 95 | /** |
| 96 | * p9mode2unixmode- convert plan9 mode bits to unix mode bits |
| 97 | * @v9ses: v9fs session information |
| 98 | * @mode: mode to convert |
| 99 | * |
| 100 | */ |
| 101 | |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 102 | static int p9mode2unixmode(struct v9fs_session_info *v9ses, int mode) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 103 | { |
| 104 | int res; |
| 105 | |
| 106 | res = mode & 0777; |
| 107 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 108 | if ((mode & P9_DMDIR) == P9_DMDIR) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 109 | res |= S_IFDIR; |
Sripathi Kodi | dd6102f | 2010-03-05 18:48:00 +0000 | [diff] [blame] | 110 | else if ((mode & P9_DMSYMLINK) && (v9fs_proto_dotu(v9ses))) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 111 | res |= S_IFLNK; |
Sripathi Kodi | dd6102f | 2010-03-05 18:48:00 +0000 | [diff] [blame] | 112 | else if ((mode & P9_DMSOCKET) && (v9fs_proto_dotu(v9ses)) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 113 | && (v9ses->nodev == 0)) |
| 114 | res |= S_IFSOCK; |
Sripathi Kodi | dd6102f | 2010-03-05 18:48:00 +0000 | [diff] [blame] | 115 | else if ((mode & P9_DMNAMEDPIPE) && (v9fs_proto_dotu(v9ses)) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 116 | && (v9ses->nodev == 0)) |
| 117 | res |= S_IFIFO; |
Sripathi Kodi | dd6102f | 2010-03-05 18:48:00 +0000 | [diff] [blame] | 118 | else if ((mode & P9_DMDEVICE) && (v9fs_proto_dotu(v9ses)) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 119 | && (v9ses->nodev == 0)) |
| 120 | res |= S_IFBLK; |
| 121 | else |
| 122 | res |= S_IFREG; |
| 123 | |
Sripathi Kodi | dd6102f | 2010-03-05 18:48:00 +0000 | [diff] [blame] | 124 | if (v9fs_proto_dotu(v9ses)) { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 125 | if ((mode & P9_DMSETUID) == P9_DMSETUID) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 126 | res |= S_ISUID; |
| 127 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 128 | if ((mode & P9_DMSETGID) == P9_DMSETGID) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 129 | res |= S_ISGID; |
Anthony Liguori | d199d65 | 2008-02-06 19:25:06 -0600 | [diff] [blame] | 130 | |
| 131 | if ((mode & P9_DMSETVTX) == P9_DMSETVTX) |
| 132 | res |= S_ISVTX; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 133 | } |
| 134 | |
| 135 | return res; |
| 136 | } |
| 137 | |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 138 | /** |
| 139 | * v9fs_uflags2omode- convert posix open flags to plan 9 mode bits |
| 140 | * @uflags: flags to convert |
Eric Van Hensbergen | 2e4bef4 | 2008-06-24 17:39:39 -0500 | [diff] [blame] | 141 | * @extended: if .u extensions are active |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 142 | */ |
| 143 | |
Eric Van Hensbergen | 2e4bef4 | 2008-06-24 17:39:39 -0500 | [diff] [blame] | 144 | int v9fs_uflags2omode(int uflags, int extended) |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 145 | { |
| 146 | int ret; |
| 147 | |
| 148 | ret = 0; |
| 149 | switch (uflags&3) { |
| 150 | default: |
| 151 | case O_RDONLY: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 152 | ret = P9_OREAD; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 153 | break; |
| 154 | |
| 155 | case O_WRONLY: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 156 | ret = P9_OWRITE; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 157 | break; |
| 158 | |
| 159 | case O_RDWR: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 160 | ret = P9_ORDWR; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 161 | break; |
| 162 | } |
| 163 | |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 164 | if (uflags & O_TRUNC) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 165 | ret |= P9_OTRUNC; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 166 | |
Eric Van Hensbergen | 2e4bef4 | 2008-06-24 17:39:39 -0500 | [diff] [blame] | 167 | if (extended) { |
| 168 | if (uflags & O_EXCL) |
| 169 | ret |= P9_OEXCL; |
| 170 | |
| 171 | if (uflags & O_APPEND) |
| 172 | ret |= P9_OAPPEND; |
| 173 | } |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 174 | |
| 175 | return ret; |
| 176 | } |
| 177 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 178 | /** |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 179 | * v9fs_blank_wstat - helper function to setup a 9P stat structure |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 180 | * @wstat: structure to initialize |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 181 | * |
| 182 | */ |
| 183 | |
M. Mohan Kumar | 7a4439c | 2010-02-08 15:36:48 -0600 | [diff] [blame] | 184 | void |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 185 | v9fs_blank_wstat(struct p9_wstat *wstat) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 186 | { |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 187 | wstat->type = ~0; |
| 188 | wstat->dev = ~0; |
| 189 | wstat->qid.type = ~0; |
| 190 | wstat->qid.version = ~0; |
| 191 | *((long long *)&wstat->qid.path) = ~0; |
| 192 | wstat->mode = ~0; |
| 193 | wstat->atime = ~0; |
| 194 | wstat->mtime = ~0; |
| 195 | wstat->length = ~0; |
| 196 | wstat->name = NULL; |
| 197 | wstat->uid = NULL; |
| 198 | wstat->gid = NULL; |
| 199 | wstat->muid = NULL; |
| 200 | wstat->n_uid = ~0; |
| 201 | wstat->n_gid = ~0; |
| 202 | wstat->n_muid = ~0; |
| 203 | wstat->extension = NULL; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 204 | } |
| 205 | |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 206 | /** |
| 207 | * v9fs_alloc_inode - helper function to allocate an inode |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 208 | * |
| 209 | */ |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 210 | struct inode *v9fs_alloc_inode(struct super_block *sb) |
| 211 | { |
Aneesh Kumar K.V | a78ce05 | 2011-02-28 17:04:02 +0530 | [diff] [blame] | 212 | struct v9fs_inode *v9inode; |
| 213 | v9inode = (struct v9fs_inode *)kmem_cache_alloc(v9fs_inode_cache, |
| 214 | GFP_KERNEL); |
| 215 | if (!v9inode) |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 216 | return NULL; |
Aneesh Kumar K.V | a78ce05 | 2011-02-28 17:04:02 +0530 | [diff] [blame] | 217 | #ifdef CONFIG_9P_FSCACHE |
| 218 | v9inode->fscache = NULL; |
| 219 | v9inode->fscache_key = NULL; |
| 220 | spin_lock_init(&v9inode->fscache_lock); |
| 221 | #endif |
Aneesh Kumar K.V | 6b39f6d | 2011-02-28 17:04:03 +0530 | [diff] [blame] | 222 | v9inode->writeback_fid = NULL; |
Aneesh Kumar K.V | b3cbea0 | 2011-02-28 17:04:06 +0530 | [diff] [blame] | 223 | v9inode->cache_validity = 0; |
Aneesh Kumar K.V | 5a7e0a8 | 2011-03-08 16:39:46 +0530 | [diff] [blame] | 224 | mutex_init(&v9inode->v_mutex); |
Aneesh Kumar K.V | a78ce05 | 2011-02-28 17:04:02 +0530 | [diff] [blame] | 225 | return &v9inode->vfs_inode; |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 226 | } |
| 227 | |
| 228 | /** |
| 229 | * v9fs_destroy_inode - destroy an inode |
| 230 | * |
| 231 | */ |
| 232 | |
Nick Piggin | fa0d7e3d | 2011-01-07 17:49:49 +1100 | [diff] [blame] | 233 | static void v9fs_i_callback(struct rcu_head *head) |
| 234 | { |
| 235 | struct inode *inode = container_of(head, struct inode, i_rcu); |
| 236 | INIT_LIST_HEAD(&inode->i_dentry); |
Aneesh Kumar K.V | a78ce05 | 2011-02-28 17:04:02 +0530 | [diff] [blame] | 237 | kmem_cache_free(v9fs_inode_cache, V9FS_I(inode)); |
Nick Piggin | fa0d7e3d | 2011-01-07 17:49:49 +1100 | [diff] [blame] | 238 | } |
| 239 | |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 240 | void v9fs_destroy_inode(struct inode *inode) |
| 241 | { |
Nick Piggin | fa0d7e3d | 2011-01-07 17:49:49 +1100 | [diff] [blame] | 242 | call_rcu(&inode->i_rcu, v9fs_i_callback); |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 243 | } |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 244 | |
Aneesh Kumar K.V | 5ffc0cb | 2011-02-28 17:04:01 +0530 | [diff] [blame] | 245 | int v9fs_init_inode(struct v9fs_session_info *v9ses, |
| 246 | struct inode *inode, int mode) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 247 | { |
Aneesh Kumar K.V | 5ffc0cb | 2011-02-28 17:04:01 +0530 | [diff] [blame] | 248 | int err = 0; |
Abhishek Kulkarni | 2bb5411 | 2009-07-19 13:41:56 -0600 | [diff] [blame] | 249 | |
Dmitry Monakhov | 217f206 | 2010-03-04 17:30:57 +0300 | [diff] [blame] | 250 | inode_init_owner(inode, NULL, mode); |
Abhishek Kulkarni | 2bb5411 | 2009-07-19 13:41:56 -0600 | [diff] [blame] | 251 | inode->i_blocks = 0; |
| 252 | inode->i_rdev = 0; |
| 253 | inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; |
| 254 | inode->i_mapping->a_ops = &v9fs_addr_operations; |
| 255 | |
| 256 | switch (mode & S_IFMT) { |
| 257 | case S_IFIFO: |
| 258 | case S_IFBLK: |
| 259 | case S_IFCHR: |
| 260 | case S_IFSOCK: |
M. Mohan Kumar | 4b43516 | 2010-06-16 14:27:01 +0530 | [diff] [blame] | 261 | if (v9fs_proto_dotl(v9ses)) { |
| 262 | inode->i_op = &v9fs_file_inode_operations_dotl; |
| 263 | inode->i_fop = &v9fs_file_operations_dotl; |
| 264 | } else if (v9fs_proto_dotu(v9ses)) { |
| 265 | inode->i_op = &v9fs_file_inode_operations; |
| 266 | inode->i_fop = &v9fs_file_operations; |
| 267 | } else { |
Abhishek Kulkarni | 2bb5411 | 2009-07-19 13:41:56 -0600 | [diff] [blame] | 268 | P9_DPRINTK(P9_DEBUG_ERROR, |
| 269 | "special files without extended mode\n"); |
| 270 | err = -EINVAL; |
| 271 | goto error; |
| 272 | } |
| 273 | init_special_inode(inode, inode->i_mode, inode->i_rdev); |
| 274 | break; |
| 275 | case S_IFREG: |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 276 | if (v9fs_proto_dotl(v9ses)) { |
| 277 | inode->i_op = &v9fs_file_inode_operations_dotl; |
Aneesh Kumar K.V | 29236f4 | 2011-02-28 17:03:54 +0530 | [diff] [blame] | 278 | if (v9ses->cache) |
| 279 | inode->i_fop = |
| 280 | &v9fs_cached_file_operations_dotl; |
| 281 | else |
| 282 | inode->i_fop = &v9fs_file_operations_dotl; |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 283 | } else { |
| 284 | inode->i_op = &v9fs_file_inode_operations; |
Aneesh Kumar K.V | 29236f4 | 2011-02-28 17:03:54 +0530 | [diff] [blame] | 285 | if (v9ses->cache) |
| 286 | inode->i_fop = &v9fs_cached_file_operations; |
| 287 | else |
| 288 | inode->i_fop = &v9fs_file_operations; |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 289 | } |
| 290 | |
Abhishek Kulkarni | 2bb5411 | 2009-07-19 13:41:56 -0600 | [diff] [blame] | 291 | break; |
| 292 | case S_IFLNK: |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 293 | if (!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses)) { |
| 294 | P9_DPRINTK(P9_DEBUG_ERROR, "extended modes used with " |
| 295 | "legacy protocol.\n"); |
Abhishek Kulkarni | 2bb5411 | 2009-07-19 13:41:56 -0600 | [diff] [blame] | 296 | err = -EINVAL; |
| 297 | goto error; |
| 298 | } |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 299 | |
| 300 | if (v9fs_proto_dotl(v9ses)) |
| 301 | inode->i_op = &v9fs_symlink_inode_operations_dotl; |
| 302 | else |
| 303 | inode->i_op = &v9fs_symlink_inode_operations; |
| 304 | |
Abhishek Kulkarni | 2bb5411 | 2009-07-19 13:41:56 -0600 | [diff] [blame] | 305 | break; |
| 306 | case S_IFDIR: |
| 307 | inc_nlink(inode); |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 308 | if (v9fs_proto_dotl(v9ses)) |
| 309 | inode->i_op = &v9fs_dir_inode_operations_dotl; |
| 310 | else if (v9fs_proto_dotu(v9ses)) |
| 311 | inode->i_op = &v9fs_dir_inode_operations_dotu; |
Abhishek Kulkarni | 2bb5411 | 2009-07-19 13:41:56 -0600 | [diff] [blame] | 312 | else |
| 313 | inode->i_op = &v9fs_dir_inode_operations; |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 314 | |
| 315 | if (v9fs_proto_dotl(v9ses)) |
| 316 | inode->i_fop = &v9fs_dir_operations_dotl; |
| 317 | else |
| 318 | inode->i_fop = &v9fs_dir_operations; |
| 319 | |
Abhishek Kulkarni | 2bb5411 | 2009-07-19 13:41:56 -0600 | [diff] [blame] | 320 | break; |
| 321 | default: |
| 322 | P9_DPRINTK(P9_DEBUG_ERROR, "BAD mode 0x%x S_IFMT 0x%x\n", |
| 323 | mode, mode & S_IFMT); |
| 324 | err = -EINVAL; |
| 325 | goto error; |
| 326 | } |
Abhishek Kulkarni | 2bb5411 | 2009-07-19 13:41:56 -0600 | [diff] [blame] | 327 | error: |
Aneesh Kumar K.V | 5ffc0cb | 2011-02-28 17:04:01 +0530 | [diff] [blame] | 328 | return err; |
| 329 | |
| 330 | } |
| 331 | |
| 332 | /** |
| 333 | * v9fs_get_inode - helper function to setup an inode |
| 334 | * @sb: superblock |
| 335 | * @mode: mode to setup inode with |
| 336 | * |
| 337 | */ |
| 338 | |
| 339 | struct inode *v9fs_get_inode(struct super_block *sb, int mode) |
| 340 | { |
| 341 | int err; |
| 342 | struct inode *inode; |
| 343 | struct v9fs_session_info *v9ses = sb->s_fs_info; |
| 344 | |
| 345 | P9_DPRINTK(P9_DEBUG_VFS, "super block: %p mode: %o\n", sb, mode); |
| 346 | |
| 347 | inode = new_inode(sb); |
| 348 | if (!inode) { |
| 349 | P9_EPRINTK(KERN_WARNING, "Problem allocating inode\n"); |
| 350 | return ERR_PTR(-ENOMEM); |
| 351 | } |
| 352 | err = v9fs_init_inode(v9ses, inode, mode); |
| 353 | if (err) { |
| 354 | iput(inode); |
| 355 | return ERR_PTR(err); |
| 356 | } |
| 357 | return inode; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 358 | } |
| 359 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 360 | /* |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 361 | static struct v9fs_fid* |
| 362 | v9fs_clone_walk(struct v9fs_session_info *v9ses, u32 fid, struct dentry *dentry) |
| 363 | { |
| 364 | int err; |
Mika Kukkonen | 736c4b85 | 2006-12-06 20:36:29 -0800 | [diff] [blame] | 365 | int nfid; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 366 | struct v9fs_fid *ret; |
| 367 | struct v9fs_fcall *fcall; |
| 368 | |
| 369 | nfid = v9fs_get_idpool(&v9ses->fidpool); |
| 370 | if (nfid < 0) { |
| 371 | eprintk(KERN_WARNING, "no free fids available\n"); |
Latchesar Ionkov | 731805b | 2006-03-07 21:55:42 -0800 | [diff] [blame] | 372 | return ERR_PTR(-ENOSPC); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 373 | } |
| 374 | |
| 375 | err = v9fs_t_walk(v9ses, fid, nfid, (char *) dentry->d_name.name, |
| 376 | &fcall); |
| 377 | |
| 378 | if (err < 0) { |
Latchesar Ionkov | 41e5a6a | 2006-05-15 09:44:21 -0700 | [diff] [blame] | 379 | if (fcall && fcall->id == RWALK) |
| 380 | goto clunk_fid; |
| 381 | |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 382 | PRINT_FCALL_ERROR("walk error", fcall); |
| 383 | v9fs_put_idpool(nfid, &v9ses->fidpool); |
| 384 | goto error; |
| 385 | } |
| 386 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 387 | kfree(fcall); |
Latchesar Ionkov | 3cf6429 | 2006-01-08 01:04:58 -0800 | [diff] [blame] | 388 | fcall = NULL; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 389 | ret = v9fs_fid_create(v9ses, nfid); |
| 390 | if (!ret) { |
| 391 | err = -ENOMEM; |
| 392 | goto clunk_fid; |
| 393 | } |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 394 | |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 395 | err = v9fs_fid_insert(ret, dentry); |
| 396 | if (err < 0) { |
| 397 | v9fs_fid_destroy(ret); |
| 398 | goto clunk_fid; |
Latchesar Ionkov | 0b8dd17 | 2005-09-27 21:45:24 -0700 | [diff] [blame] | 399 | } |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 400 | |
| 401 | return ret; |
| 402 | |
| 403 | clunk_fid: |
| 404 | v9fs_t_clunk(v9ses, nfid); |
| 405 | |
| 406 | error: |
| 407 | kfree(fcall); |
| 408 | return ERR_PTR(err); |
| 409 | } |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 410 | */ |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 411 | |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 412 | |
| 413 | /** |
| 414 | * v9fs_clear_inode - release an inode |
| 415 | * @inode: inode to release |
| 416 | * |
| 417 | */ |
Al Viro | b57922d | 2010-06-07 14:34:48 -0400 | [diff] [blame] | 418 | void v9fs_evict_inode(struct inode *inode) |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 419 | { |
Aneesh Kumar K.V | 6b39f6d | 2011-02-28 17:04:03 +0530 | [diff] [blame] | 420 | struct v9fs_inode *v9inode = V9FS_I(inode); |
| 421 | |
Al Viro | b57922d | 2010-06-07 14:34:48 -0400 | [diff] [blame] | 422 | truncate_inode_pages(inode->i_mapping, 0); |
| 423 | end_writeback(inode); |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 424 | filemap_fdatawrite(inode->i_mapping); |
| 425 | |
| 426 | #ifdef CONFIG_9P_FSCACHE |
| 427 | v9fs_cache_inode_put_cookie(inode); |
| 428 | #endif |
Aneesh Kumar K.V | 6b39f6d | 2011-02-28 17:04:03 +0530 | [diff] [blame] | 429 | /* clunk the fid stashed in writeback_fid */ |
| 430 | if (v9inode->writeback_fid) { |
| 431 | p9_client_clunk(v9inode->writeback_fid); |
| 432 | v9inode->writeback_fid = NULL; |
Aneesh Kumar K.V | 3cf387d | 2011-02-28 17:03:57 +0530 | [diff] [blame] | 433 | } |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 434 | } |
| 435 | |
Aneesh Kumar K.V | 5ffc0cb | 2011-02-28 17:04:01 +0530 | [diff] [blame] | 436 | static struct inode *v9fs_qid_iget(struct super_block *sb, |
| 437 | struct p9_qid *qid, |
| 438 | struct p9_wstat *st) |
| 439 | { |
| 440 | int retval, umode; |
| 441 | unsigned long i_ino; |
| 442 | struct inode *inode; |
| 443 | struct v9fs_session_info *v9ses = sb->s_fs_info; |
| 444 | |
| 445 | i_ino = v9fs_qid2ino(qid); |
| 446 | inode = iget_locked(sb, i_ino); |
| 447 | if (!inode) |
| 448 | return ERR_PTR(-ENOMEM); |
| 449 | if (!(inode->i_state & I_NEW)) |
| 450 | return inode; |
| 451 | /* |
| 452 | * initialize the inode with the stat info |
| 453 | * FIXME!! we may need support for stale inodes |
| 454 | * later. |
| 455 | */ |
| 456 | umode = p9mode2unixmode(v9ses, st->mode); |
| 457 | retval = v9fs_init_inode(v9ses, inode, umode); |
| 458 | if (retval) |
| 459 | goto error; |
| 460 | |
| 461 | v9fs_stat2inode(st, inode, sb); |
| 462 | #ifdef CONFIG_9P_FSCACHE |
Aneesh Kumar K.V | a78ce05 | 2011-02-28 17:04:02 +0530 | [diff] [blame] | 463 | v9fs_fscache_set_key(inode, &st->qid); |
Aneesh Kumar K.V | 5ffc0cb | 2011-02-28 17:04:01 +0530 | [diff] [blame] | 464 | v9fs_cache_inode_get_cookie(inode); |
| 465 | #endif |
| 466 | unlock_new_inode(inode); |
| 467 | return inode; |
| 468 | error: |
| 469 | unlock_new_inode(inode); |
| 470 | iput(inode); |
| 471 | return ERR_PTR(retval); |
| 472 | |
| 473 | } |
| 474 | |
Aneesh Kumar K.V | 53c06f4 | 2011-01-10 13:51:47 -0600 | [diff] [blame] | 475 | struct inode * |
Aneesh Kumar K.V | a78ce05 | 2011-02-28 17:04:02 +0530 | [diff] [blame] | 476 | v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, |
| 477 | struct super_block *sb) |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 478 | { |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 479 | struct p9_wstat *st; |
Aneesh Kumar K.V | 5ffc0cb | 2011-02-28 17:04:01 +0530 | [diff] [blame] | 480 | struct inode *inode = NULL; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 481 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 482 | st = p9_client_stat(fid); |
Abhishek Kulkarni | 02bc356 | 2009-07-19 13:41:54 -0600 | [diff] [blame] | 483 | if (IS_ERR(st)) |
| 484 | return ERR_CAST(st); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 485 | |
Aneesh Kumar K.V | 5ffc0cb | 2011-02-28 17:04:01 +0530 | [diff] [blame] | 486 | inode = v9fs_qid_iget(sb, &st->qid, st); |
Abhishek Kulkarni | 02bc356 | 2009-07-19 13:41:54 -0600 | [diff] [blame] | 487 | p9stat_free(st); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 488 | kfree(st); |
Aneesh Kumar K.V | 5ffc0cb | 2011-02-28 17:04:01 +0530 | [diff] [blame] | 489 | return inode; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 490 | } |
| 491 | |
| 492 | /** |
| 493 | * v9fs_remove - helper function to remove files and directories |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 494 | * @dir: directory inode that is being deleted |
| 495 | * @file: dentry that is being deleted |
| 496 | * @rmdir: removing a directory |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 497 | * |
| 498 | */ |
| 499 | |
| 500 | static int v9fs_remove(struct inode *dir, struct dentry *file, int rmdir) |
| 501 | { |
Aneesh Kumar K.V | d994f40 | 2010-03-29 18:14:50 -0500 | [diff] [blame] | 502 | int retval; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 503 | struct p9_fid *v9fid; |
Aneesh Kumar K.V | d28c61f | 2011-02-28 17:04:08 +0530 | [diff] [blame] | 504 | struct inode *file_inode; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 505 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 506 | P9_DPRINTK(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %d\n", dir, file, |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 507 | rmdir); |
| 508 | |
| 509 | file_inode = file->d_inode; |
Latchesar Ionkov | c959df9 | 2007-04-23 14:41:11 -0700 | [diff] [blame] | 510 | v9fid = v9fs_fid_clone(file); |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 511 | if (IS_ERR(v9fid)) |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 512 | return PTR_ERR(v9fid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 513 | |
Aneesh Kumar K.V | d994f40 | 2010-03-29 18:14:50 -0500 | [diff] [blame] | 514 | retval = p9_client_remove(v9fid); |
Aneesh Kumar K.V | b271ec4 | 2011-02-28 17:04:05 +0530 | [diff] [blame] | 515 | if (!retval) { |
| 516 | /* |
| 517 | * directories on unlink should have zero |
| 518 | * link count |
| 519 | */ |
| 520 | if (rmdir) { |
| 521 | clear_nlink(file_inode); |
| 522 | drop_nlink(dir); |
| 523 | } else |
| 524 | drop_nlink(file_inode); |
Aneesh Kumar K.V | d28c61f | 2011-02-28 17:04:08 +0530 | [diff] [blame] | 525 | |
Aneesh Kumar K.V | 3bc86de | 2011-02-28 17:04:07 +0530 | [diff] [blame] | 526 | v9fs_invalidate_inode_attr(file_inode); |
Aneesh Kumar K.V | d28c61f | 2011-02-28 17:04:08 +0530 | [diff] [blame] | 527 | v9fs_invalidate_inode_attr(dir); |
Aneesh Kumar K.V | b271ec4 | 2011-02-28 17:04:05 +0530 | [diff] [blame] | 528 | } |
Aneesh Kumar K.V | d994f40 | 2010-03-29 18:14:50 -0500 | [diff] [blame] | 529 | return retval; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 530 | } |
| 531 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 532 | /** |
| 533 | * v9fs_create - Create a file |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 534 | * @v9ses: session information |
| 535 | * @dir: directory that dentry is being created in |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 536 | * @dentry: dentry that is being created |
Abhishek Kulkarni | 0e15597 | 2009-07-19 13:41:55 -0600 | [diff] [blame] | 537 | * @extension: 9p2000.u extension string to support devices, etc. |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 538 | * @perm: create permissions |
| 539 | * @mode: open mode |
| 540 | * |
| 541 | */ |
| 542 | static struct p9_fid * |
| 543 | v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir, |
| 544 | struct dentry *dentry, char *extension, u32 perm, u8 mode) |
| 545 | { |
| 546 | int err; |
| 547 | char *name; |
| 548 | struct p9_fid *dfid, *ofid, *fid; |
| 549 | struct inode *inode; |
| 550 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 551 | P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); |
| 552 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 553 | err = 0; |
| 554 | ofid = NULL; |
| 555 | fid = NULL; |
| 556 | name = (char *) dentry->d_name.name; |
Venkateswararao Jujjuri | 6d27e64 | 2010-05-10 18:08:28 +0000 | [diff] [blame] | 557 | dfid = v9fs_fid_lookup(dentry->d_parent); |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 558 | if (IS_ERR(dfid)) { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 559 | err = PTR_ERR(dfid); |
Venkateswararao Jujjuri | 6d27e64 | 2010-05-10 18:08:28 +0000 | [diff] [blame] | 560 | P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); |
| 561 | return ERR_PTR(err); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 562 | } |
| 563 | |
| 564 | /* clone a fid to use for creation */ |
| 565 | ofid = p9_client_walk(dfid, 0, NULL, 1); |
| 566 | if (IS_ERR(ofid)) { |
| 567 | err = PTR_ERR(ofid); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 568 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); |
Venkateswararao Jujjuri | 6d27e64 | 2010-05-10 18:08:28 +0000 | [diff] [blame] | 569 | return ERR_PTR(err); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 570 | } |
| 571 | |
| 572 | err = p9_client_fcreate(ofid, name, perm, mode, extension); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 573 | if (err < 0) { |
| 574 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 575 | goto error; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 576 | } |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 577 | |
| 578 | /* now walk from the parent so we can get unopened fid */ |
Venkateswararao Jujjuri | 6d27e64 | 2010-05-10 18:08:28 +0000 | [diff] [blame] | 579 | fid = p9_client_walk(dfid, 1, &name, 1); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 580 | if (IS_ERR(fid)) { |
| 581 | err = PTR_ERR(fid); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 582 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 583 | fid = NULL; |
| 584 | goto error; |
Venkateswararao Jujjuri | 6d27e64 | 2010-05-10 18:08:28 +0000 | [diff] [blame] | 585 | } |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 586 | |
| 587 | /* instantiate inode and assign the unopened fid to the dentry */ |
Aneesh Kumar K.V | a78ce05 | 2011-02-28 17:04:02 +0530 | [diff] [blame] | 588 | inode = v9fs_get_inode_from_fid(v9ses, fid, dir->i_sb); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 589 | if (IS_ERR(inode)) { |
| 590 | err = PTR_ERR(inode); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 591 | P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", err); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 592 | goto error; |
| 593 | } |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 594 | d_instantiate(dentry, inode); |
Abhishek Kulkarni | 50fb6d2 | 2009-07-19 13:41:57 -0600 | [diff] [blame] | 595 | err = v9fs_fid_add(dentry, fid); |
| 596 | if (err < 0) |
| 597 | goto error; |
| 598 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 599 | return ofid; |
| 600 | |
| 601 | error: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 602 | if (ofid) |
| 603 | p9_client_clunk(ofid); |
| 604 | |
| 605 | if (fid) |
| 606 | p9_client_clunk(fid); |
| 607 | |
| 608 | return ERR_PTR(err); |
| 609 | } |
| 610 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 611 | /** |
| 612 | * v9fs_vfs_create - VFS hook to create files |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 613 | * @dir: directory inode that is being created |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 614 | * @dentry: dentry that is being deleted |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 615 | * @mode: create permissions |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 616 | * @nd: path information |
| 617 | * |
| 618 | */ |
| 619 | |
| 620 | static int |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 621 | v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode, |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 622 | struct nameidata *nd) |
| 623 | { |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 624 | int err; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 625 | u32 perm; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 626 | int flags; |
Aneesh Kumar K.V | 6b39f6d | 2011-02-28 17:04:03 +0530 | [diff] [blame] | 627 | struct file *filp; |
| 628 | struct v9fs_inode *v9inode; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 629 | struct v9fs_session_info *v9ses; |
Aneesh Kumar K.V | 3cf387d | 2011-02-28 17:03:57 +0530 | [diff] [blame] | 630 | struct p9_fid *fid, *inode_fid; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 631 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 632 | err = 0; |
| 633 | fid = NULL; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 634 | v9ses = v9fs_inode2v9ses(dir); |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 635 | perm = unixmode2p9mode(v9ses, mode); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 636 | if (nd && nd->flags & LOOKUP_OPEN) |
| 637 | flags = nd->intent.open.flags - 1; |
| 638 | else |
| 639 | flags = O_RDWR; |
| 640 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 641 | fid = v9fs_create(v9ses, dir, dentry, NULL, perm, |
Sripathi Kodi | dd6102f | 2010-03-05 18:48:00 +0000 | [diff] [blame] | 642 | v9fs_uflags2omode(flags, |
| 643 | v9fs_proto_dotu(v9ses))); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 644 | if (IS_ERR(fid)) { |
| 645 | err = PTR_ERR(fid); |
| 646 | fid = NULL; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 647 | goto error; |
| 648 | } |
| 649 | |
Aneesh Kumar K.V | d28c61f | 2011-02-28 17:04:08 +0530 | [diff] [blame] | 650 | v9fs_invalidate_inode_attr(dir); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 651 | /* if we are opening a file, assign the open fid to the file */ |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 652 | if (nd && nd->flags & LOOKUP_OPEN) { |
Aneesh Kumar K.V | 6b39f6d | 2011-02-28 17:04:03 +0530 | [diff] [blame] | 653 | v9inode = V9FS_I(dentry->d_inode); |
Aneesh Kumar K.V | 5a7e0a8 | 2011-03-08 16:39:46 +0530 | [diff] [blame] | 654 | mutex_lock(&v9inode->v_mutex); |
Aneesh Kumar K.V | 7add697 | 2011-03-08 16:39:49 +0530 | [diff] [blame^] | 655 | if (v9ses->cache && !v9inode->writeback_fid && |
| 656 | ((flags & O_ACCMODE) != O_RDONLY)) { |
Aneesh Kumar K.V | 3cf387d | 2011-02-28 17:03:57 +0530 | [diff] [blame] | 657 | /* |
Aneesh Kumar K.V | 6b39f6d | 2011-02-28 17:04:03 +0530 | [diff] [blame] | 658 | * clone a fid and add it to writeback_fid |
Aneesh Kumar K.V | 3cf387d | 2011-02-28 17:03:57 +0530 | [diff] [blame] | 659 | * we do it during open time instead of |
| 660 | * page dirty time via write_begin/page_mkwrite |
| 661 | * because we want write after unlink usecase |
| 662 | * to work. |
| 663 | */ |
| 664 | inode_fid = v9fs_writeback_fid(dentry); |
| 665 | if (IS_ERR(inode_fid)) { |
| 666 | err = PTR_ERR(inode_fid); |
Aneesh Kumar K.V | 5a7e0a8 | 2011-03-08 16:39:46 +0530 | [diff] [blame] | 667 | mutex_unlock(&v9inode->v_mutex); |
Aneesh Kumar K.V | 3cf387d | 2011-02-28 17:03:57 +0530 | [diff] [blame] | 668 | goto error; |
| 669 | } |
Aneesh Kumar K.V | 6b39f6d | 2011-02-28 17:04:03 +0530 | [diff] [blame] | 670 | v9inode->writeback_fid = (void *) inode_fid; |
Aneesh Kumar K.V | 3cf387d | 2011-02-28 17:03:57 +0530 | [diff] [blame] | 671 | } |
Aneesh Kumar K.V | 5a7e0a8 | 2011-03-08 16:39:46 +0530 | [diff] [blame] | 672 | mutex_unlock(&v9inode->v_mutex); |
Aneesh Kumar K.V | 877cb3d | 2010-09-22 12:42:30 +0530 | [diff] [blame] | 673 | filp = lookup_instantiate_filp(nd, dentry, generic_file_open); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 674 | if (IS_ERR(filp)) { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 675 | err = PTR_ERR(filp); |
| 676 | goto error; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 677 | } |
| 678 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 679 | filp->private_data = fid; |
Aneesh Kumar K.V | 46848de | 2011-02-28 17:03:55 +0530 | [diff] [blame] | 680 | #ifdef CONFIG_9P_FSCACHE |
| 681 | if (v9ses->cache) |
| 682 | v9fs_cache_inode_set_cookie(dentry->d_inode, filp); |
| 683 | #endif |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 684 | } else |
| 685 | p9_client_clunk(fid); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 686 | |
| 687 | return 0; |
| 688 | |
| 689 | error: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 690 | if (fid) |
| 691 | p9_client_clunk(fid); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 692 | |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 693 | return err; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 694 | } |
| 695 | |
| 696 | /** |
| 697 | * v9fs_vfs_mkdir - VFS mkdir hook to create a directory |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 698 | * @dir: inode that is being unlinked |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 699 | * @dentry: dentry that is being unlinked |
| 700 | * @mode: mode for new directory |
| 701 | * |
| 702 | */ |
| 703 | |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 704 | static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 705 | { |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 706 | int err; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 707 | u32 perm; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 708 | struct p9_fid *fid; |
Aneesh Kumar K.V | d28c61f | 2011-02-28 17:04:08 +0530 | [diff] [blame] | 709 | struct v9fs_session_info *v9ses; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 710 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 711 | P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); |
| 712 | err = 0; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 713 | v9ses = v9fs_inode2v9ses(dir); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 714 | perm = unixmode2p9mode(v9ses, mode | S_IFDIR); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 715 | fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD); |
| 716 | if (IS_ERR(fid)) { |
| 717 | err = PTR_ERR(fid); |
| 718 | fid = NULL; |
Aneesh Kumar K.V | d28c61f | 2011-02-28 17:04:08 +0530 | [diff] [blame] | 719 | } else { |
Aneesh Kumar K.V | b271ec4 | 2011-02-28 17:04:05 +0530 | [diff] [blame] | 720 | inc_nlink(dir); |
Aneesh Kumar K.V | d28c61f | 2011-02-28 17:04:08 +0530 | [diff] [blame] | 721 | v9fs_invalidate_inode_attr(dir); |
| 722 | } |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 723 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 724 | if (fid) |
| 725 | p9_client_clunk(fid); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 726 | |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 727 | return err; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 728 | } |
| 729 | |
| 730 | /** |
| 731 | * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode |
| 732 | * @dir: inode that is being walked from |
| 733 | * @dentry: dentry that is being walked to? |
| 734 | * @nameidata: path data |
| 735 | * |
| 736 | */ |
| 737 | |
Aneesh Kumar K.V | 53c06f4 | 2011-01-10 13:51:47 -0600 | [diff] [blame] | 738 | struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 739 | struct nameidata *nameidata) |
| 740 | { |
| 741 | struct super_block *sb; |
| 742 | struct v9fs_session_info *v9ses; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 743 | struct p9_fid *dfid, *fid; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 744 | struct inode *inode; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 745 | char *name; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 746 | int result = 0; |
| 747 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 748 | P9_DPRINTK(P9_DEBUG_VFS, "dir: %p dentry: (%s) %p nameidata: %p\n", |
Latchesar Ionkov | 731805b | 2006-03-07 21:55:42 -0800 | [diff] [blame] | 749 | dir, dentry->d_name.name, dentry, nameidata); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 750 | |
Sripathi Kodi | 11e9b49 | 2010-03-29 18:13:59 -0500 | [diff] [blame] | 751 | if (dentry->d_name.len > NAME_MAX) |
| 752 | return ERR_PTR(-ENAMETOOLONG); |
| 753 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 754 | sb = dir->i_sb; |
| 755 | v9ses = v9fs_inode2v9ses(dir); |
Aneesh Kumar K.V | a534c8d | 2010-06-30 19:18:50 +0530 | [diff] [blame] | 756 | /* We can walk d_parent because we hold the dir->i_mutex */ |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 757 | dfid = v9fs_fid_lookup(dentry->d_parent); |
| 758 | if (IS_ERR(dfid)) |
David Howells | e231c2e | 2008-02-07 00:15:26 -0800 | [diff] [blame] | 759 | return ERR_CAST(dfid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 760 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 761 | name = (char *) dentry->d_name.name; |
| 762 | fid = p9_client_walk(dfid, 1, &name, 1); |
| 763 | if (IS_ERR(fid)) { |
| 764 | result = PTR_ERR(fid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 765 | if (result == -ENOENT) { |
Aneesh Kumar K.V | 85e0df2 | 2010-05-14 13:04:39 +0000 | [diff] [blame] | 766 | inode = NULL; |
| 767 | goto inst_out; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 768 | } |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 769 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 770 | return ERR_PTR(result); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 771 | } |
| 772 | |
Aneesh Kumar K.V | a78ce05 | 2011-02-28 17:04:02 +0530 | [diff] [blame] | 773 | inode = v9fs_get_inode_from_fid(v9ses, fid, dir->i_sb); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 774 | if (IS_ERR(inode)) { |
| 775 | result = PTR_ERR(inode); |
| 776 | inode = NULL; |
| 777 | goto error; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 778 | } |
| 779 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 780 | result = v9fs_fid_add(dentry, fid); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 781 | if (result < 0) |
Aneesh Kumar K.V | 9856af8 | 2010-09-22 12:24:23 +0530 | [diff] [blame] | 782 | goto error_iput; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 783 | |
Aneesh Kumar K.V | 85e0df2 | 2010-05-14 13:04:39 +0000 | [diff] [blame] | 784 | inst_out: |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 785 | d_add(dentry, inode); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 786 | return NULL; |
| 787 | |
Aneesh Kumar K.V | 9856af8 | 2010-09-22 12:24:23 +0530 | [diff] [blame] | 788 | error_iput: |
| 789 | iput(inode); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 790 | error: |
Julien Brunel | 62aa528 | 2008-09-24 16:22:22 -0500 | [diff] [blame] | 791 | p9_client_clunk(fid); |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 792 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 793 | return ERR_PTR(result); |
| 794 | } |
| 795 | |
| 796 | /** |
| 797 | * v9fs_vfs_unlink - VFS unlink hook to delete an inode |
| 798 | * @i: inode that is being unlinked |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 799 | * @d: dentry that is being unlinked |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 800 | * |
| 801 | */ |
| 802 | |
Aneesh Kumar K.V | 53c06f4 | 2011-01-10 13:51:47 -0600 | [diff] [blame] | 803 | int v9fs_vfs_unlink(struct inode *i, struct dentry *d) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 804 | { |
| 805 | return v9fs_remove(i, d, 0); |
| 806 | } |
| 807 | |
| 808 | /** |
| 809 | * v9fs_vfs_rmdir - VFS unlink hook to delete a directory |
| 810 | * @i: inode that is being unlinked |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 811 | * @d: dentry that is being unlinked |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 812 | * |
| 813 | */ |
| 814 | |
Aneesh Kumar K.V | 53c06f4 | 2011-01-10 13:51:47 -0600 | [diff] [blame] | 815 | int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 816 | { |
| 817 | return v9fs_remove(i, d, 1); |
| 818 | } |
| 819 | |
| 820 | /** |
| 821 | * v9fs_vfs_rename - VFS hook to rename an inode |
| 822 | * @old_dir: old dir inode |
| 823 | * @old_dentry: old dentry |
| 824 | * @new_dir: new dir inode |
| 825 | * @new_dentry: new dentry |
| 826 | * |
| 827 | */ |
| 828 | |
Aneesh Kumar K.V | 53c06f4 | 2011-01-10 13:51:47 -0600 | [diff] [blame] | 829 | int |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 830 | v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry, |
| 831 | struct inode *new_dir, struct dentry *new_dentry) |
| 832 | { |
Aneesh Kumar K.V | d28c61f | 2011-02-28 17:04:08 +0530 | [diff] [blame] | 833 | int retval; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 834 | struct inode *old_inode; |
Aneesh Kumar K.V | b271ec4 | 2011-02-28 17:04:05 +0530 | [diff] [blame] | 835 | struct inode *new_inode; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 836 | struct v9fs_session_info *v9ses; |
| 837 | struct p9_fid *oldfid; |
| 838 | struct p9_fid *olddirfid; |
| 839 | struct p9_fid *newdirfid; |
| 840 | struct p9_wstat wstat; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 841 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 842 | P9_DPRINTK(P9_DEBUG_VFS, "\n"); |
| 843 | retval = 0; |
| 844 | old_inode = old_dentry->d_inode; |
Aneesh Kumar K.V | b271ec4 | 2011-02-28 17:04:05 +0530 | [diff] [blame] | 845 | new_inode = new_dentry->d_inode; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 846 | v9ses = v9fs_inode2v9ses(old_inode); |
| 847 | oldfid = v9fs_fid_lookup(old_dentry); |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 848 | if (IS_ERR(oldfid)) |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 849 | return PTR_ERR(oldfid); |
| 850 | |
| 851 | olddirfid = v9fs_fid_clone(old_dentry->d_parent); |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 852 | if (IS_ERR(olddirfid)) { |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 853 | retval = PTR_ERR(olddirfid); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 854 | goto done; |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 855 | } |
| 856 | |
| 857 | newdirfid = v9fs_fid_clone(new_dentry->d_parent); |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 858 | if (IS_ERR(newdirfid)) { |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 859 | retval = PTR_ERR(newdirfid); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 860 | goto clunk_olddir; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 861 | } |
| 862 | |
Aneesh Kumar K.V | a534c8d | 2010-06-30 19:18:50 +0530 | [diff] [blame] | 863 | down_write(&v9ses->rename_sem); |
Sripathi Kodi | 4681dbd | 2010-03-25 12:47:26 +0000 | [diff] [blame] | 864 | if (v9fs_proto_dotl(v9ses)) { |
| 865 | retval = p9_client_rename(oldfid, newdirfid, |
| 866 | (char *) new_dentry->d_name.name); |
| 867 | if (retval != -ENOSYS) |
| 868 | goto clunk_newdir; |
| 869 | } |
Aneesh Kumar K.V | a534c8d | 2010-06-30 19:18:50 +0530 | [diff] [blame] | 870 | if (old_dentry->d_parent != new_dentry->d_parent) { |
| 871 | /* |
| 872 | * 9P .u can only handle file rename in the same directory |
| 873 | */ |
Sripathi Kodi | 4681dbd | 2010-03-25 12:47:26 +0000 | [diff] [blame] | 874 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 875 | P9_DPRINTK(P9_DEBUG_ERROR, |
| 876 | "old dir and new dir are different\n"); |
Eric Van Hensbergen | 621997c | 2007-01-26 00:57:04 -0800 | [diff] [blame] | 877 | retval = -EXDEV; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 878 | goto clunk_newdir; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 879 | } |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 880 | v9fs_blank_wstat(&wstat); |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 881 | wstat.muid = v9ses->uname; |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 882 | wstat.name = (char *) new_dentry->d_name.name; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 883 | retval = p9_client_wstat(oldfid, &wstat); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 884 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 885 | clunk_newdir: |
Aneesh Kumar K.V | b271ec4 | 2011-02-28 17:04:05 +0530 | [diff] [blame] | 886 | if (!retval) { |
| 887 | if (new_inode) { |
| 888 | if (S_ISDIR(new_inode->i_mode)) |
| 889 | clear_nlink(new_inode); |
| 890 | else |
| 891 | drop_nlink(new_inode); |
Aneesh Kumar K.V | 23b08e9 | 2011-02-28 17:04:08 +0530 | [diff] [blame] | 892 | /* |
| 893 | * Work around vfs rename rehash bug with |
| 894 | * FS_RENAME_DOES_D_MOVE |
| 895 | */ |
| 896 | v9fs_invalidate_inode_attr(new_inode); |
Aneesh Kumar K.V | b271ec4 | 2011-02-28 17:04:05 +0530 | [diff] [blame] | 897 | } |
| 898 | if (S_ISDIR(old_inode->i_mode)) { |
| 899 | if (!new_inode) |
| 900 | inc_nlink(new_dir); |
| 901 | drop_nlink(old_dir); |
| 902 | } |
Aneesh Kumar K.V | 3bc86de | 2011-02-28 17:04:07 +0530 | [diff] [blame] | 903 | v9fs_invalidate_inode_attr(old_inode); |
Aneesh Kumar K.V | d28c61f | 2011-02-28 17:04:08 +0530 | [diff] [blame] | 904 | v9fs_invalidate_inode_attr(old_dir); |
| 905 | v9fs_invalidate_inode_attr(new_dir); |
Aneesh Kumar K.V | 3bc86de | 2011-02-28 17:04:07 +0530 | [diff] [blame] | 906 | |
Aneesh Kumar K.V | a534c8d | 2010-06-30 19:18:50 +0530 | [diff] [blame] | 907 | /* successful rename */ |
| 908 | d_move(old_dentry, new_dentry); |
Aneesh Kumar K.V | b271ec4 | 2011-02-28 17:04:05 +0530 | [diff] [blame] | 909 | } |
Aneesh Kumar K.V | a534c8d | 2010-06-30 19:18:50 +0530 | [diff] [blame] | 910 | up_write(&v9ses->rename_sem); |
Latchesar Ionkov | 22150c4 | 2007-10-23 13:48:33 -0500 | [diff] [blame] | 911 | p9_client_clunk(newdirfid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 912 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 913 | clunk_olddir: |
Latchesar Ionkov | 22150c4 | 2007-10-23 13:48:33 -0500 | [diff] [blame] | 914 | p9_client_clunk(olddirfid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 915 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 916 | done: |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 917 | return retval; |
| 918 | } |
| 919 | |
| 920 | /** |
Adrian Bunk | 943ffb5 | 2006-01-10 00:10:13 +0100 | [diff] [blame] | 921 | * v9fs_vfs_getattr - retrieve file metadata |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 922 | * @mnt: mount information |
| 923 | * @dentry: file to get attributes on |
| 924 | * @stat: metadata structure to populate |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 925 | * |
| 926 | */ |
| 927 | |
| 928 | static int |
| 929 | v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry, |
| 930 | struct kstat *stat) |
| 931 | { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 932 | int err; |
| 933 | struct v9fs_session_info *v9ses; |
| 934 | struct p9_fid *fid; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 935 | struct p9_wstat *st; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 936 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 937 | P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry); |
| 938 | err = -EPERM; |
| 939 | v9ses = v9fs_inode2v9ses(dentry->d_inode); |
Aneesh Kumar K.V | a121190 | 2011-02-28 17:04:01 +0530 | [diff] [blame] | 940 | if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { |
| 941 | generic_fillattr(dentry->d_inode, stat); |
| 942 | return 0; |
| 943 | } |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 944 | fid = v9fs_fid_lookup(dentry); |
| 945 | if (IS_ERR(fid)) |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 946 | return PTR_ERR(fid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 947 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 948 | st = p9_client_stat(fid); |
| 949 | if (IS_ERR(st)) |
| 950 | return PTR_ERR(st); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 951 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 952 | v9fs_stat2inode(st, dentry->d_inode, dentry->d_inode->i_sb); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 953 | generic_fillattr(dentry->d_inode, stat); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 954 | |
Latchesar Ionkov | 62b2be5 | 2010-08-24 18:13:59 +0000 | [diff] [blame] | 955 | p9stat_free(st); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 956 | kfree(st); |
| 957 | return 0; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 958 | } |
| 959 | |
| 960 | /** |
| 961 | * v9fs_vfs_setattr - set file metadata |
| 962 | * @dentry: file whose metadata to set |
| 963 | * @iattr: metadata assignment structure |
| 964 | * |
| 965 | */ |
| 966 | |
| 967 | static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr) |
| 968 | { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 969 | int retval; |
| 970 | struct v9fs_session_info *v9ses; |
| 971 | struct p9_fid *fid; |
| 972 | struct p9_wstat wstat; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 973 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 974 | P9_DPRINTK(P9_DEBUG_VFS, "\n"); |
Aneesh Kumar K.V | 059c138 | 2011-03-08 16:39:48 +0530 | [diff] [blame] | 975 | retval = inode_change_ok(dentry->d_inode, iattr); |
| 976 | if (retval) |
| 977 | return retval; |
| 978 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 979 | retval = -EPERM; |
| 980 | v9ses = v9fs_inode2v9ses(dentry->d_inode); |
| 981 | fid = v9fs_fid_lookup(dentry); |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 982 | if(IS_ERR(fid)) |
| 983 | return PTR_ERR(fid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 984 | |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 985 | v9fs_blank_wstat(&wstat); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 986 | if (iattr->ia_valid & ATTR_MODE) |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 987 | wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 988 | |
| 989 | if (iattr->ia_valid & ATTR_MTIME) |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 990 | wstat.mtime = iattr->ia_mtime.tv_sec; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 991 | |
| 992 | if (iattr->ia_valid & ATTR_ATIME) |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 993 | wstat.atime = iattr->ia_atime.tv_sec; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 994 | |
| 995 | if (iattr->ia_valid & ATTR_SIZE) |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 996 | wstat.length = iattr->ia_size; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 997 | |
Sripathi Kodi | dd6102f | 2010-03-05 18:48:00 +0000 | [diff] [blame] | 998 | if (v9fs_proto_dotu(v9ses)) { |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 999 | if (iattr->ia_valid & ATTR_UID) |
| 1000 | wstat.n_uid = iattr->ia_uid; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1001 | |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1002 | if (iattr->ia_valid & ATTR_GID) |
| 1003 | wstat.n_gid = iattr->ia_gid; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1004 | } |
Aneesh Kumar K.V | 059c138 | 2011-03-08 16:39:48 +0530 | [diff] [blame] | 1005 | |
Aneesh Kumar K.V | 3dc5436 | 2011-02-28 17:04:11 +0530 | [diff] [blame] | 1006 | /* Write all dirty data */ |
| 1007 | if (S_ISREG(dentry->d_inode->i_mode)) |
| 1008 | filemap_write_and_wait(dentry->d_inode->i_mapping); |
| 1009 | |
Aneesh Kumar K.V | f10fc50 | 2011-02-28 17:04:10 +0530 | [diff] [blame] | 1010 | retval = p9_client_wstat(fid, &wstat); |
| 1011 | if (retval < 0) |
| 1012 | return retval; |
Aneesh Kumar K.V | 059c138 | 2011-03-08 16:39:48 +0530 | [diff] [blame] | 1013 | |
| 1014 | if ((iattr->ia_valid & ATTR_SIZE) && |
| 1015 | iattr->ia_size != i_size_read(dentry->d_inode)) |
| 1016 | truncate_setsize(dentry->d_inode, iattr->ia_size); |
| 1017 | |
Aneesh Kumar K.V | f10fc50 | 2011-02-28 17:04:10 +0530 | [diff] [blame] | 1018 | v9fs_invalidate_inode_attr(dentry->d_inode); |
Christoph Hellwig | 1025774 | 2010-06-04 11:30:02 +0200 | [diff] [blame] | 1019 | |
| 1020 | setattr_copy(dentry->d_inode, iattr); |
| 1021 | mark_inode_dirty(dentry->d_inode); |
| 1022 | return 0; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1023 | } |
| 1024 | |
| 1025 | /** |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1026 | * v9fs_stat2inode - populate an inode structure with mistat info |
| 1027 | * @stat: Plan 9 metadata (mistat) structure |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1028 | * @inode: inode to populate |
| 1029 | * @sb: superblock of filesystem |
| 1030 | * |
| 1031 | */ |
| 1032 | |
| 1033 | void |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1034 | v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode, |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1035 | struct super_block *sb) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1036 | { |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1037 | char ext[32]; |
Aneesh Kumar K.V | 5717144 | 2010-03-05 14:43:43 -0600 | [diff] [blame] | 1038 | char tag_name[14]; |
| 1039 | unsigned int i_nlink; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1040 | struct v9fs_session_info *v9ses = sb->s_fs_info; |
Aneesh Kumar K.V | b3cbea0 | 2011-02-28 17:04:06 +0530 | [diff] [blame] | 1041 | struct v9fs_inode *v9inode = V9FS_I(inode); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1042 | |
| 1043 | inode->i_nlink = 1; |
| 1044 | |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1045 | inode->i_atime.tv_sec = stat->atime; |
| 1046 | inode->i_mtime.tv_sec = stat->mtime; |
| 1047 | inode->i_ctime.tv_sec = stat->mtime; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1048 | |
Latchesar Ionkov | bd32b82 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 1049 | inode->i_uid = v9ses->dfltuid; |
| 1050 | inode->i_gid = v9ses->dfltgid; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1051 | |
Sripathi Kodi | dd6102f | 2010-03-05 18:48:00 +0000 | [diff] [blame] | 1052 | if (v9fs_proto_dotu(v9ses)) { |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1053 | inode->i_uid = stat->n_uid; |
| 1054 | inode->i_gid = stat->n_gid; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1055 | } |
Aneesh Kumar K.V | 5717144 | 2010-03-05 14:43:43 -0600 | [diff] [blame] | 1056 | if ((S_ISREG(inode->i_mode)) || (S_ISDIR(inode->i_mode))) { |
| 1057 | if (v9fs_proto_dotu(v9ses) && (stat->extension[0] != '\0')) { |
| 1058 | /* |
| 1059 | * Hadlink support got added later to |
| 1060 | * to the .u extension. So there can be |
| 1061 | * server out there that doesn't support |
| 1062 | * this even with .u extension. So check |
| 1063 | * for non NULL stat->extension |
| 1064 | */ |
| 1065 | strncpy(ext, stat->extension, sizeof(ext)); |
| 1066 | /* HARDLINKCOUNT %u */ |
| 1067 | sscanf(ext, "%13s %u", tag_name, &i_nlink); |
| 1068 | if (!strncmp(tag_name, "HARDLINKCOUNT", 13)) |
| 1069 | inode->i_nlink = i_nlink; |
| 1070 | } |
| 1071 | } |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1072 | inode->i_mode = p9mode2unixmode(v9ses, stat->mode); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1073 | if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) { |
| 1074 | char type = 0; |
| 1075 | int major = -1; |
| 1076 | int minor = -1; |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1077 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1078 | strncpy(ext, stat->extension, sizeof(ext)); |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1079 | sscanf(ext, "%c %u %u", &type, &major, &minor); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1080 | switch (type) { |
| 1081 | case 'c': |
| 1082 | inode->i_mode &= ~S_IFBLK; |
| 1083 | inode->i_mode |= S_IFCHR; |
| 1084 | break; |
| 1085 | case 'b': |
| 1086 | break; |
| 1087 | default: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1088 | P9_DPRINTK(P9_DEBUG_ERROR, |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1089 | "Unknown special type %c %s\n", type, |
| 1090 | stat->extension); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1091 | }; |
| 1092 | inode->i_rdev = MKDEV(major, minor); |
Magnus Deininger | 57c7b4e | 2008-10-17 12:44:46 -0500 | [diff] [blame] | 1093 | init_special_inode(inode, inode->i_mode, inode->i_rdev); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1094 | } else |
| 1095 | inode->i_rdev = 0; |
| 1096 | |
Abhishek Kulkarni | 7549ae3 | 2009-09-22 11:34:05 -0500 | [diff] [blame] | 1097 | i_size_write(inode, stat->length); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1098 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1099 | /* not real number of blocks, but 512 byte ones ... */ |
Abhishek Kulkarni | 7549ae3 | 2009-09-22 11:34:05 -0500 | [diff] [blame] | 1100 | inode->i_blocks = (i_size_read(inode) + 512 - 1) >> 9; |
Aneesh Kumar K.V | b3cbea0 | 2011-02-28 17:04:06 +0530 | [diff] [blame] | 1101 | v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1102 | } |
| 1103 | |
| 1104 | /** |
| 1105 | * v9fs_qid2ino - convert qid into inode number |
| 1106 | * @qid: qid to hash |
| 1107 | * |
| 1108 | * BUG: potential for inode number collisions? |
| 1109 | */ |
| 1110 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1111 | ino_t v9fs_qid2ino(struct p9_qid *qid) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1112 | { |
| 1113 | u64 path = qid->path + 2; |
| 1114 | ino_t i = 0; |
| 1115 | |
| 1116 | if (sizeof(ino_t) == sizeof(path)) |
| 1117 | memcpy(&i, &path, sizeof(ino_t)); |
| 1118 | else |
| 1119 | i = (ino_t) (path ^ (path >> 32)); |
| 1120 | |
| 1121 | return i; |
| 1122 | } |
| 1123 | |
| 1124 | /** |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1125 | * v9fs_readlink - read a symlink's location (internal version) |
| 1126 | * @dentry: dentry for symlink |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 1127 | * @buffer: buffer to load symlink location into |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1128 | * @buflen: length of buffer |
| 1129 | * |
| 1130 | */ |
| 1131 | |
| 1132 | static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen) |
| 1133 | { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1134 | int retval; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1135 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1136 | struct v9fs_session_info *v9ses; |
| 1137 | struct p9_fid *fid; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1138 | struct p9_wstat *st; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1139 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1140 | P9_DPRINTK(P9_DEBUG_VFS, " %s\n", dentry->d_name.name); |
| 1141 | retval = -EPERM; |
| 1142 | v9ses = v9fs_inode2v9ses(dentry->d_inode); |
| 1143 | fid = v9fs_fid_lookup(dentry); |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 1144 | if (IS_ERR(fid)) |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 1145 | return PTR_ERR(fid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1146 | |
M. Mohan Kumar | 329176c | 2010-09-28 19:59:25 +0530 | [diff] [blame] | 1147 | if (!v9fs_proto_dotu(v9ses)) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1148 | return -EBADF; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1149 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1150 | st = p9_client_stat(fid); |
| 1151 | if (IS_ERR(st)) |
| 1152 | return PTR_ERR(st); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1153 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1154 | if (!(st->mode & P9_DMSYMLINK)) { |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1155 | retval = -EINVAL; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1156 | goto done; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1157 | } |
| 1158 | |
| 1159 | /* copy extension buffer into buffer */ |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1160 | strncpy(buffer, st->extension, buflen); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1161 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1162 | P9_DPRINTK(P9_DEBUG_VFS, |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1163 | "%s -> %s (%s)\n", dentry->d_name.name, st->extension, buffer); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1164 | |
Martin Stava | 2511cd0 | 2009-11-02 08:39:34 -0600 | [diff] [blame] | 1165 | retval = strnlen(buffer, buflen); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1166 | done: |
Latchesar Ionkov | 62b2be5 | 2010-08-24 18:13:59 +0000 | [diff] [blame] | 1167 | p9stat_free(st); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1168 | kfree(st); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1169 | return retval; |
| 1170 | } |
| 1171 | |
| 1172 | /** |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1173 | * v9fs_vfs_follow_link - follow a symlink path |
| 1174 | * @dentry: dentry for symlink |
| 1175 | * @nd: nameidata |
| 1176 | * |
| 1177 | */ |
| 1178 | |
| 1179 | static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd) |
| 1180 | { |
| 1181 | int len = 0; |
| 1182 | char *link = __getname(); |
| 1183 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1184 | P9_DPRINTK(P9_DEBUG_VFS, "%s n", dentry->d_name.name); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1185 | |
| 1186 | if (!link) |
| 1187 | link = ERR_PTR(-ENOMEM); |
| 1188 | else { |
Latchesar Ionkov | 16cce6d | 2006-03-25 03:07:26 -0800 | [diff] [blame] | 1189 | len = v9fs_readlink(dentry, link, PATH_MAX); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1190 | |
| 1191 | if (len < 0) { |
Davi Arnaut | ce44eeb | 2005-11-07 00:59:36 -0800 | [diff] [blame] | 1192 | __putname(link); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1193 | link = ERR_PTR(len); |
| 1194 | } else |
Martin Stava | 2511cd0 | 2009-11-02 08:39:34 -0600 | [diff] [blame] | 1195 | link[min(len, PATH_MAX-1)] = 0; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1196 | } |
| 1197 | nd_set_link(nd, link); |
| 1198 | |
| 1199 | return NULL; |
| 1200 | } |
| 1201 | |
| 1202 | /** |
| 1203 | * v9fs_vfs_put_link - release a symlink path |
| 1204 | * @dentry: dentry for symlink |
| 1205 | * @nd: nameidata |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 1206 | * @p: unused |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1207 | * |
| 1208 | */ |
| 1209 | |
Aneesh Kumar K.V | 53c06f4 | 2011-01-10 13:51:47 -0600 | [diff] [blame] | 1210 | void |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 1211 | v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, void *p) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1212 | { |
| 1213 | char *s = nd_get_link(nd); |
| 1214 | |
Duane Griffin | 6ff2320 | 2008-12-19 16:45:21 -0600 | [diff] [blame] | 1215 | P9_DPRINTK(P9_DEBUG_VFS, " %s %s\n", dentry->d_name.name, |
| 1216 | IS_ERR(s) ? "<error>" : s); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1217 | if (!IS_ERR(s)) |
Davi Arnaut | ce44eeb | 2005-11-07 00:59:36 -0800 | [diff] [blame] | 1218 | __putname(s); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1219 | } |
| 1220 | |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 1221 | /** |
| 1222 | * v9fs_vfs_mkspecial - create a special file |
| 1223 | * @dir: inode to create special file in |
| 1224 | * @dentry: dentry to create |
| 1225 | * @mode: mode to create special file |
| 1226 | * @extension: 9p2000.u format extension string representing special file |
| 1227 | * |
| 1228 | */ |
| 1229 | |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1230 | static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, |
| 1231 | int mode, const char *extension) |
| 1232 | { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1233 | u32 perm; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1234 | struct p9_fid *fid; |
Aneesh Kumar K.V | d28c61f | 2011-02-28 17:04:08 +0530 | [diff] [blame] | 1235 | struct v9fs_session_info *v9ses; |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1236 | |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 1237 | v9ses = v9fs_inode2v9ses(dir); |
Sripathi Kodi | dd6102f | 2010-03-05 18:48:00 +0000 | [diff] [blame] | 1238 | if (!v9fs_proto_dotu(v9ses)) { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1239 | P9_DPRINTK(P9_DEBUG_ERROR, "not extended\n"); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 1240 | return -EPERM; |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1241 | } |
| 1242 | |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 1243 | perm = unixmode2p9mode(v9ses, mode); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1244 | fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm, |
| 1245 | P9_OREAD); |
| 1246 | if (IS_ERR(fid)) |
| 1247 | return PTR_ERR(fid); |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 1248 | |
Aneesh Kumar K.V | d28c61f | 2011-02-28 17:04:08 +0530 | [diff] [blame] | 1249 | v9fs_invalidate_inode_attr(dir); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1250 | p9_client_clunk(fid); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 1251 | return 0; |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1252 | } |
| 1253 | |
| 1254 | /** |
| 1255 | * v9fs_vfs_symlink - helper function to create symlinks |
| 1256 | * @dir: directory inode containing symlink |
| 1257 | * @dentry: dentry for symlink |
| 1258 | * @symname: symlink data |
| 1259 | * |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 1260 | * See Also: 9P2000.u RFC for more information |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1261 | * |
| 1262 | */ |
| 1263 | |
| 1264 | static int |
| 1265 | v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname) |
| 1266 | { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1267 | P9_DPRINTK(P9_DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino, |
| 1268 | dentry->d_name.name, symname); |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1269 | |
| 1270 | return v9fs_vfs_mkspecial(dir, dentry, S_IFLNK, symname); |
| 1271 | } |
| 1272 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1273 | /** |
| 1274 | * v9fs_vfs_link - create a hardlink |
| 1275 | * @old_dentry: dentry for file to link to |
| 1276 | * @dir: inode destination for new link |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 1277 | * @dentry: dentry for link |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1278 | * |
| 1279 | */ |
| 1280 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1281 | static int |
| 1282 | v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, |
| 1283 | struct dentry *dentry) |
| 1284 | { |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1285 | int retval; |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1286 | char *name; |
Aneesh Kumar K.V | d28c61f | 2011-02-28 17:04:08 +0530 | [diff] [blame] | 1287 | struct p9_fid *oldfid; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1288 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1289 | P9_DPRINTK(P9_DEBUG_VFS, |
| 1290 | " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name, |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1291 | old_dentry->d_name.name); |
| 1292 | |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 1293 | oldfid = v9fs_fid_clone(old_dentry); |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 1294 | if (IS_ERR(oldfid)) |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 1295 | return PTR_ERR(oldfid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1296 | |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1297 | name = __getname(); |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 1298 | if (unlikely(!name)) { |
| 1299 | retval = -ENOMEM; |
| 1300 | goto clunk_fid; |
| 1301 | } |
Florin Malita | 0710d36 | 2006-06-25 05:48:31 -0700 | [diff] [blame] | 1302 | |
Latchesar Ionkov | 16cce6d | 2006-03-25 03:07:26 -0800 | [diff] [blame] | 1303 | sprintf(name, "%d\n", oldfid->fid); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1304 | retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name); |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1305 | __putname(name); |
Aneesh Kumar K.V | c06c066 | 2011-02-28 17:04:09 +0530 | [diff] [blame] | 1306 | if (!retval) { |
| 1307 | v9fs_refresh_inode(oldfid, old_dentry->d_inode); |
Aneesh Kumar K.V | d28c61f | 2011-02-28 17:04:08 +0530 | [diff] [blame] | 1308 | v9fs_invalidate_inode_attr(dir); |
Aneesh Kumar K.V | c06c066 | 2011-02-28 17:04:09 +0530 | [diff] [blame] | 1309 | } |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 1310 | clunk_fid: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1311 | p9_client_clunk(oldfid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1312 | return retval; |
| 1313 | } |
| 1314 | |
| 1315 | /** |
| 1316 | * v9fs_vfs_mknod - create a special file |
| 1317 | * @dir: inode destination for new link |
| 1318 | * @dentry: dentry for file |
| 1319 | * @mode: mode for creation |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 1320 | * @rdev: device associated with special file |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1321 | * |
| 1322 | */ |
| 1323 | |
| 1324 | static int |
| 1325 | v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev) |
| 1326 | { |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1327 | int retval; |
| 1328 | char *name; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1329 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1330 | P9_DPRINTK(P9_DEBUG_VFS, |
| 1331 | " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino, |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1332 | dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev)); |
| 1333 | |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1334 | if (!new_valid_dev(rdev)) |
| 1335 | return -EINVAL; |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 1336 | |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1337 | name = __getname(); |
Eugene Teo | c0291a0 | 2006-03-25 03:07:27 -0800 | [diff] [blame] | 1338 | if (!name) |
| 1339 | return -ENOMEM; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1340 | /* build extension */ |
| 1341 | if (S_ISBLK(mode)) |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1342 | sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev)); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1343 | else if (S_ISCHR(mode)) |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1344 | sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev)); |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 1345 | else if (S_ISFIFO(mode)) |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1346 | *name = 0; |
Venkateswararao Jujjuri | 75cc5c9 | 2010-05-22 12:20:30 -0500 | [diff] [blame] | 1347 | else if (S_ISSOCK(mode)) |
| 1348 | *name = 0; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1349 | else { |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1350 | __putname(name); |
| 1351 | return -EINVAL; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1352 | } |
| 1353 | |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1354 | retval = v9fs_vfs_mkspecial(dir, dentry, mode, name); |
| 1355 | __putname(name); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1356 | |
| 1357 | return retval; |
| 1358 | } |
| 1359 | |
Aneesh Kumar K.V | b3cbea0 | 2011-02-28 17:04:06 +0530 | [diff] [blame] | 1360 | int v9fs_refresh_inode(struct p9_fid *fid, struct inode *inode) |
| 1361 | { |
| 1362 | loff_t i_size; |
| 1363 | struct p9_wstat *st; |
| 1364 | struct v9fs_session_info *v9ses; |
| 1365 | |
| 1366 | v9ses = v9fs_inode2v9ses(inode); |
| 1367 | st = p9_client_stat(fid); |
| 1368 | if (IS_ERR(st)) |
| 1369 | return PTR_ERR(st); |
| 1370 | |
| 1371 | spin_lock(&inode->i_lock); |
| 1372 | /* |
| 1373 | * We don't want to refresh inode->i_size, |
| 1374 | * because we may have cached data |
| 1375 | */ |
| 1376 | i_size = inode->i_size; |
| 1377 | v9fs_stat2inode(st, inode, inode->i_sb); |
| 1378 | if (v9ses->cache) |
| 1379 | inode->i_size = i_size; |
| 1380 | spin_unlock(&inode->i_lock); |
| 1381 | p9stat_free(st); |
| 1382 | kfree(st); |
| 1383 | return 0; |
| 1384 | } |
| 1385 | |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 1386 | static const struct inode_operations v9fs_dir_inode_operations_dotu = { |
| 1387 | .create = v9fs_vfs_create, |
| 1388 | .lookup = v9fs_vfs_lookup, |
| 1389 | .symlink = v9fs_vfs_symlink, |
Venkateswararao Jujjuri (JV) | 50cc42f | 2010-06-09 15:59:31 -0700 | [diff] [blame] | 1390 | .link = v9fs_vfs_link, |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 1391 | .unlink = v9fs_vfs_unlink, |
| 1392 | .mkdir = v9fs_vfs_mkdir, |
| 1393 | .rmdir = v9fs_vfs_rmdir, |
Aneesh Kumar K.V | 1d76e31 | 2010-08-30 17:43:07 +0000 | [diff] [blame] | 1394 | .mknod = v9fs_vfs_mknod, |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 1395 | .rename = v9fs_vfs_rename, |
| 1396 | .getattr = v9fs_vfs_getattr, |
| 1397 | .setattr = v9fs_vfs_setattr, |
| 1398 | }; |
| 1399 | |
Arjan van de Ven | 754661f | 2007-02-12 00:55:38 -0800 | [diff] [blame] | 1400 | static const struct inode_operations v9fs_dir_inode_operations = { |
Eric Van Hensbergen | b501611 | 2005-09-09 13:04:27 -0700 | [diff] [blame] | 1401 | .create = v9fs_vfs_create, |
| 1402 | .lookup = v9fs_vfs_lookup, |
| 1403 | .unlink = v9fs_vfs_unlink, |
| 1404 | .mkdir = v9fs_vfs_mkdir, |
| 1405 | .rmdir = v9fs_vfs_rmdir, |
| 1406 | .mknod = v9fs_vfs_mknod, |
| 1407 | .rename = v9fs_vfs_rename, |
| 1408 | .getattr = v9fs_vfs_getattr, |
| 1409 | .setattr = v9fs_vfs_setattr, |
| 1410 | }; |
| 1411 | |
Arjan van de Ven | 754661f | 2007-02-12 00:55:38 -0800 | [diff] [blame] | 1412 | static const struct inode_operations v9fs_file_inode_operations = { |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1413 | .getattr = v9fs_vfs_getattr, |
| 1414 | .setattr = v9fs_vfs_setattr, |
| 1415 | }; |
| 1416 | |
Arjan van de Ven | 754661f | 2007-02-12 00:55:38 -0800 | [diff] [blame] | 1417 | static const struct inode_operations v9fs_symlink_inode_operations = { |
Al Viro | 204f2f0 | 2009-12-23 00:35:54 -0500 | [diff] [blame] | 1418 | .readlink = generic_readlink, |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1419 | .follow_link = v9fs_vfs_follow_link, |
| 1420 | .put_link = v9fs_vfs_put_link, |
| 1421 | .getattr = v9fs_vfs_getattr, |
| 1422 | .setattr = v9fs_vfs_setattr, |
| 1423 | }; |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 1424 | |