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> |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 38 | #include <net/9p/9p.h> |
| 39 | #include <net/9p/client.h> |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 40 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 41 | #include "v9fs.h" |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 42 | #include "v9fs_vfs.h" |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 43 | #include "fid.h" |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 44 | #include "cache.h" |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 45 | |
Arjan van de Ven | 754661f | 2007-02-12 00:55:38 -0800 | [diff] [blame] | 46 | static const struct inode_operations v9fs_dir_inode_operations; |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 47 | static const struct inode_operations v9fs_dir_inode_operations_dotu; |
| 48 | static const struct inode_operations v9fs_dir_inode_operations_dotl; |
Arjan van de Ven | 754661f | 2007-02-12 00:55:38 -0800 | [diff] [blame] | 49 | static const struct inode_operations v9fs_file_inode_operations; |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 50 | static const struct inode_operations v9fs_file_inode_operations_dotl; |
Arjan van de Ven | 754661f | 2007-02-12 00:55:38 -0800 | [diff] [blame] | 51 | static const struct inode_operations v9fs_symlink_inode_operations; |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 52 | static const struct inode_operations v9fs_symlink_inode_operations_dotl; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 53 | |
| 54 | /** |
| 55 | * unixmode2p9mode - convert unix mode bits to plan 9 |
| 56 | * @v9ses: v9fs session information |
| 57 | * @mode: mode to convert |
| 58 | * |
| 59 | */ |
| 60 | |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 61 | static int unixmode2p9mode(struct v9fs_session_info *v9ses, int mode) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 62 | { |
| 63 | int res; |
| 64 | res = mode & 0777; |
| 65 | if (S_ISDIR(mode)) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 66 | res |= P9_DMDIR; |
Sripathi Kodi | dd6102f | 2010-03-05 18:48:00 +0000 | [diff] [blame] | 67 | if (v9fs_proto_dotu(v9ses)) { |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 68 | if (S_ISLNK(mode)) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 69 | res |= P9_DMSYMLINK; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 70 | if (v9ses->nodev == 0) { |
| 71 | if (S_ISSOCK(mode)) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 72 | res |= P9_DMSOCKET; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 73 | if (S_ISFIFO(mode)) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 74 | res |= P9_DMNAMEDPIPE; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 75 | if (S_ISBLK(mode)) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 76 | res |= P9_DMDEVICE; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 77 | if (S_ISCHR(mode)) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 78 | res |= P9_DMDEVICE; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 79 | } |
| 80 | |
| 81 | if ((mode & S_ISUID) == S_ISUID) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 82 | res |= P9_DMSETUID; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 83 | if ((mode & S_ISGID) == S_ISGID) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 84 | res |= P9_DMSETGID; |
Anthony Liguori | d199d65 | 2008-02-06 19:25:06 -0600 | [diff] [blame] | 85 | if ((mode & S_ISVTX) == S_ISVTX) |
| 86 | res |= P9_DMSETVTX; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 87 | if ((mode & P9_DMLINK)) |
| 88 | res |= P9_DMLINK; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 89 | } |
| 90 | |
| 91 | return res; |
| 92 | } |
| 93 | |
| 94 | /** |
| 95 | * p9mode2unixmode- convert plan9 mode bits to unix mode bits |
| 96 | * @v9ses: v9fs session information |
| 97 | * @mode: mode to convert |
| 98 | * |
| 99 | */ |
| 100 | |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 101 | static int p9mode2unixmode(struct v9fs_session_info *v9ses, int mode) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 102 | { |
| 103 | int res; |
| 104 | |
| 105 | res = mode & 0777; |
| 106 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 107 | if ((mode & P9_DMDIR) == P9_DMDIR) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 108 | res |= S_IFDIR; |
Sripathi Kodi | dd6102f | 2010-03-05 18:48:00 +0000 | [diff] [blame] | 109 | else if ((mode & P9_DMSYMLINK) && (v9fs_proto_dotu(v9ses))) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 110 | res |= S_IFLNK; |
Sripathi Kodi | dd6102f | 2010-03-05 18:48:00 +0000 | [diff] [blame] | 111 | else if ((mode & P9_DMSOCKET) && (v9fs_proto_dotu(v9ses)) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 112 | && (v9ses->nodev == 0)) |
| 113 | res |= S_IFSOCK; |
Sripathi Kodi | dd6102f | 2010-03-05 18:48:00 +0000 | [diff] [blame] | 114 | else if ((mode & P9_DMNAMEDPIPE) && (v9fs_proto_dotu(v9ses)) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 115 | && (v9ses->nodev == 0)) |
| 116 | res |= S_IFIFO; |
Sripathi Kodi | dd6102f | 2010-03-05 18:48:00 +0000 | [diff] [blame] | 117 | else if ((mode & P9_DMDEVICE) && (v9fs_proto_dotu(v9ses)) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 118 | && (v9ses->nodev == 0)) |
| 119 | res |= S_IFBLK; |
| 120 | else |
| 121 | res |= S_IFREG; |
| 122 | |
Sripathi Kodi | dd6102f | 2010-03-05 18:48:00 +0000 | [diff] [blame] | 123 | if (v9fs_proto_dotu(v9ses)) { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 124 | if ((mode & P9_DMSETUID) == P9_DMSETUID) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 125 | res |= S_ISUID; |
| 126 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 127 | if ((mode & P9_DMSETGID) == P9_DMSETGID) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 128 | res |= S_ISGID; |
Anthony Liguori | d199d65 | 2008-02-06 19:25:06 -0600 | [diff] [blame] | 129 | |
| 130 | if ((mode & P9_DMSETVTX) == P9_DMSETVTX) |
| 131 | res |= S_ISVTX; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 132 | } |
| 133 | |
| 134 | return res; |
| 135 | } |
| 136 | |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 137 | /** |
| 138 | * v9fs_uflags2omode- convert posix open flags to plan 9 mode bits |
| 139 | * @uflags: flags to convert |
Eric Van Hensbergen | 2e4bef4 | 2008-06-24 17:39:39 -0500 | [diff] [blame] | 140 | * @extended: if .u extensions are active |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 141 | */ |
| 142 | |
Eric Van Hensbergen | 2e4bef4 | 2008-06-24 17:39:39 -0500 | [diff] [blame] | 143 | int v9fs_uflags2omode(int uflags, int extended) |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 144 | { |
| 145 | int ret; |
| 146 | |
| 147 | ret = 0; |
| 148 | switch (uflags&3) { |
| 149 | default: |
| 150 | case O_RDONLY: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 151 | ret = P9_OREAD; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 152 | break; |
| 153 | |
| 154 | case O_WRONLY: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 155 | ret = P9_OWRITE; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 156 | break; |
| 157 | |
| 158 | case O_RDWR: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 159 | ret = P9_ORDWR; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 160 | break; |
| 161 | } |
| 162 | |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 163 | if (uflags & O_TRUNC) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 164 | ret |= P9_OTRUNC; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 165 | |
Eric Van Hensbergen | 2e4bef4 | 2008-06-24 17:39:39 -0500 | [diff] [blame] | 166 | if (extended) { |
| 167 | if (uflags & O_EXCL) |
| 168 | ret |= P9_OEXCL; |
| 169 | |
| 170 | if (uflags & O_APPEND) |
| 171 | ret |= P9_OAPPEND; |
| 172 | } |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 173 | |
| 174 | return ret; |
| 175 | } |
| 176 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 177 | /** |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 178 | * v9fs_blank_wstat - helper function to setup a 9P stat structure |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 179 | * @wstat: structure to initialize |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 180 | * |
| 181 | */ |
| 182 | |
M. Mohan Kumar | 7a4439c | 2010-02-08 15:36:48 -0600 | [diff] [blame] | 183 | void |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 184 | v9fs_blank_wstat(struct p9_wstat *wstat) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 185 | { |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 186 | wstat->type = ~0; |
| 187 | wstat->dev = ~0; |
| 188 | wstat->qid.type = ~0; |
| 189 | wstat->qid.version = ~0; |
| 190 | *((long long *)&wstat->qid.path) = ~0; |
| 191 | wstat->mode = ~0; |
| 192 | wstat->atime = ~0; |
| 193 | wstat->mtime = ~0; |
| 194 | wstat->length = ~0; |
| 195 | wstat->name = NULL; |
| 196 | wstat->uid = NULL; |
| 197 | wstat->gid = NULL; |
| 198 | wstat->muid = NULL; |
| 199 | wstat->n_uid = ~0; |
| 200 | wstat->n_gid = ~0; |
| 201 | wstat->n_muid = ~0; |
| 202 | wstat->extension = NULL; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 203 | } |
| 204 | |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 205 | #ifdef CONFIG_9P_FSCACHE |
| 206 | /** |
| 207 | * v9fs_alloc_inode - helper function to allocate an inode |
| 208 | * This callback is executed before setting up the inode so that we |
| 209 | * can associate a vcookie with each inode. |
| 210 | * |
| 211 | */ |
| 212 | |
| 213 | struct inode *v9fs_alloc_inode(struct super_block *sb) |
| 214 | { |
| 215 | struct v9fs_cookie *vcookie; |
| 216 | vcookie = (struct v9fs_cookie *)kmem_cache_alloc(vcookie_cache, |
| 217 | GFP_KERNEL); |
| 218 | if (!vcookie) |
| 219 | return NULL; |
| 220 | |
| 221 | vcookie->fscache = NULL; |
| 222 | vcookie->qid = NULL; |
| 223 | spin_lock_init(&vcookie->lock); |
| 224 | return &vcookie->inode; |
| 225 | } |
| 226 | |
| 227 | /** |
| 228 | * v9fs_destroy_inode - destroy an inode |
| 229 | * |
| 230 | */ |
| 231 | |
| 232 | void v9fs_destroy_inode(struct inode *inode) |
| 233 | { |
| 234 | kmem_cache_free(vcookie_cache, v9fs_inode2cookie(inode)); |
| 235 | } |
| 236 | #endif |
| 237 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 238 | /** |
Eric Van Hensbergen | 09d34ee | 2010-08-02 14:28:09 -0500 | [diff] [blame] | 239 | * v9fs_get_fsgid_for_create - Helper function to get the gid for creating a |
| 240 | * new file system object. This checks the S_ISGID to determine the owning |
| 241 | * group of the new file system object. |
| 242 | */ |
| 243 | |
| 244 | static gid_t v9fs_get_fsgid_for_create(struct inode *dir_inode) |
| 245 | { |
| 246 | BUG_ON(dir_inode == NULL); |
| 247 | |
| 248 | if (dir_inode->i_mode & S_ISGID) { |
| 249 | /* set_gid bit is set.*/ |
| 250 | return dir_inode->i_gid; |
| 251 | } |
| 252 | return current_fsgid(); |
| 253 | } |
| 254 | |
| 255 | /** |
| 256 | * v9fs_dentry_from_dir_inode - helper function to get the dentry from |
| 257 | * dir inode. |
| 258 | * |
| 259 | */ |
| 260 | |
| 261 | struct dentry *v9fs_dentry_from_dir_inode(struct inode *inode) |
| 262 | { |
| 263 | struct dentry *dentry; |
| 264 | |
| 265 | spin_lock(&dcache_lock); |
| 266 | /* Directory should have only one entry. */ |
| 267 | BUG_ON(S_ISDIR(inode->i_mode) && !list_is_singular(&inode->i_dentry)); |
| 268 | dentry = list_entry(inode->i_dentry.next, struct dentry, d_alias); |
| 269 | spin_unlock(&dcache_lock); |
| 270 | return dentry; |
| 271 | } |
| 272 | |
| 273 | /** |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 274 | * v9fs_get_inode - helper function to setup an inode |
| 275 | * @sb: superblock |
| 276 | * @mode: mode to setup inode with |
| 277 | * |
| 278 | */ |
| 279 | |
| 280 | struct inode *v9fs_get_inode(struct super_block *sb, int mode) |
| 281 | { |
Abhishek Kulkarni | 2bb5411 | 2009-07-19 13:41:56 -0600 | [diff] [blame] | 282 | int err; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 283 | struct inode *inode; |
Eric Van Hensbergen | b501611 | 2005-09-09 13:04:27 -0700 | [diff] [blame] | 284 | struct v9fs_session_info *v9ses = sb->s_fs_info; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 285 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 286 | P9_DPRINTK(P9_DEBUG_VFS, "super block: %p mode: %o\n", sb, mode); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 287 | |
| 288 | inode = new_inode(sb); |
Abhishek Kulkarni | 2bb5411 | 2009-07-19 13:41:56 -0600 | [diff] [blame] | 289 | if (!inode) { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 290 | P9_EPRINTK(KERN_WARNING, "Problem allocating inode\n"); |
Abhishek Kulkarni | 48559b4c | 2009-08-17 16:32:18 -0500 | [diff] [blame] | 291 | return ERR_PTR(-ENOMEM); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 292 | } |
Abhishek Kulkarni | 2bb5411 | 2009-07-19 13:41:56 -0600 | [diff] [blame] | 293 | |
Dmitry Monakhov | 217f206 | 2010-03-04 17:30:57 +0300 | [diff] [blame] | 294 | inode_init_owner(inode, NULL, mode); |
Abhishek Kulkarni | 2bb5411 | 2009-07-19 13:41:56 -0600 | [diff] [blame] | 295 | inode->i_blocks = 0; |
| 296 | inode->i_rdev = 0; |
| 297 | inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; |
| 298 | inode->i_mapping->a_ops = &v9fs_addr_operations; |
| 299 | |
| 300 | switch (mode & S_IFMT) { |
| 301 | case S_IFIFO: |
| 302 | case S_IFBLK: |
| 303 | case S_IFCHR: |
| 304 | case S_IFSOCK: |
M. Mohan Kumar | 4b43516 | 2010-06-16 14:27:01 +0530 | [diff] [blame^] | 305 | if (v9fs_proto_dotl(v9ses)) { |
| 306 | inode->i_op = &v9fs_file_inode_operations_dotl; |
| 307 | inode->i_fop = &v9fs_file_operations_dotl; |
| 308 | } else if (v9fs_proto_dotu(v9ses)) { |
| 309 | inode->i_op = &v9fs_file_inode_operations; |
| 310 | inode->i_fop = &v9fs_file_operations; |
| 311 | } else { |
Abhishek Kulkarni | 2bb5411 | 2009-07-19 13:41:56 -0600 | [diff] [blame] | 312 | P9_DPRINTK(P9_DEBUG_ERROR, |
| 313 | "special files without extended mode\n"); |
| 314 | err = -EINVAL; |
| 315 | goto error; |
| 316 | } |
| 317 | init_special_inode(inode, inode->i_mode, inode->i_rdev); |
| 318 | break; |
| 319 | case S_IFREG: |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 320 | if (v9fs_proto_dotl(v9ses)) { |
| 321 | inode->i_op = &v9fs_file_inode_operations_dotl; |
| 322 | inode->i_fop = &v9fs_file_operations_dotl; |
| 323 | } else { |
| 324 | inode->i_op = &v9fs_file_inode_operations; |
| 325 | inode->i_fop = &v9fs_file_operations; |
| 326 | } |
| 327 | |
Abhishek Kulkarni | 2bb5411 | 2009-07-19 13:41:56 -0600 | [diff] [blame] | 328 | break; |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 329 | |
Abhishek Kulkarni | 2bb5411 | 2009-07-19 13:41:56 -0600 | [diff] [blame] | 330 | case S_IFLNK: |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 331 | if (!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses)) { |
| 332 | P9_DPRINTK(P9_DEBUG_ERROR, "extended modes used with " |
| 333 | "legacy protocol.\n"); |
Abhishek Kulkarni | 2bb5411 | 2009-07-19 13:41:56 -0600 | [diff] [blame] | 334 | err = -EINVAL; |
| 335 | goto error; |
| 336 | } |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 337 | |
| 338 | if (v9fs_proto_dotl(v9ses)) |
| 339 | inode->i_op = &v9fs_symlink_inode_operations_dotl; |
| 340 | else |
| 341 | inode->i_op = &v9fs_symlink_inode_operations; |
| 342 | |
Abhishek Kulkarni | 2bb5411 | 2009-07-19 13:41:56 -0600 | [diff] [blame] | 343 | break; |
| 344 | case S_IFDIR: |
| 345 | inc_nlink(inode); |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 346 | if (v9fs_proto_dotl(v9ses)) |
| 347 | inode->i_op = &v9fs_dir_inode_operations_dotl; |
| 348 | else if (v9fs_proto_dotu(v9ses)) |
| 349 | inode->i_op = &v9fs_dir_inode_operations_dotu; |
Abhishek Kulkarni | 2bb5411 | 2009-07-19 13:41:56 -0600 | [diff] [blame] | 350 | else |
| 351 | inode->i_op = &v9fs_dir_inode_operations; |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 352 | |
| 353 | if (v9fs_proto_dotl(v9ses)) |
| 354 | inode->i_fop = &v9fs_dir_operations_dotl; |
| 355 | else |
| 356 | inode->i_fop = &v9fs_dir_operations; |
| 357 | |
Abhishek Kulkarni | 2bb5411 | 2009-07-19 13:41:56 -0600 | [diff] [blame] | 358 | break; |
| 359 | default: |
| 360 | P9_DPRINTK(P9_DEBUG_ERROR, "BAD mode 0x%x S_IFMT 0x%x\n", |
| 361 | mode, mode & S_IFMT); |
| 362 | err = -EINVAL; |
| 363 | goto error; |
| 364 | } |
| 365 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 366 | return inode; |
Abhishek Kulkarni | 2bb5411 | 2009-07-19 13:41:56 -0600 | [diff] [blame] | 367 | |
| 368 | error: |
| 369 | iput(inode); |
| 370 | return ERR_PTR(err); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 371 | } |
| 372 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 373 | /* |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 374 | static struct v9fs_fid* |
| 375 | v9fs_clone_walk(struct v9fs_session_info *v9ses, u32 fid, struct dentry *dentry) |
| 376 | { |
| 377 | int err; |
Mika Kukkonen | 736c4b8 | 2006-12-06 20:36:29 -0800 | [diff] [blame] | 378 | int nfid; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 379 | struct v9fs_fid *ret; |
| 380 | struct v9fs_fcall *fcall; |
| 381 | |
| 382 | nfid = v9fs_get_idpool(&v9ses->fidpool); |
| 383 | if (nfid < 0) { |
| 384 | eprintk(KERN_WARNING, "no free fids available\n"); |
Latchesar Ionkov | 731805b | 2006-03-07 21:55:42 -0800 | [diff] [blame] | 385 | return ERR_PTR(-ENOSPC); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 386 | } |
| 387 | |
| 388 | err = v9fs_t_walk(v9ses, fid, nfid, (char *) dentry->d_name.name, |
| 389 | &fcall); |
| 390 | |
| 391 | if (err < 0) { |
Latchesar Ionkov | 41e5a6a | 2006-05-15 09:44:21 -0700 | [diff] [blame] | 392 | if (fcall && fcall->id == RWALK) |
| 393 | goto clunk_fid; |
| 394 | |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 395 | PRINT_FCALL_ERROR("walk error", fcall); |
| 396 | v9fs_put_idpool(nfid, &v9ses->fidpool); |
| 397 | goto error; |
| 398 | } |
| 399 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 400 | kfree(fcall); |
Latchesar Ionkov | 3cf6429 | 2006-01-08 01:04:58 -0800 | [diff] [blame] | 401 | fcall = NULL; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 402 | ret = v9fs_fid_create(v9ses, nfid); |
| 403 | if (!ret) { |
| 404 | err = -ENOMEM; |
| 405 | goto clunk_fid; |
| 406 | } |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 407 | |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 408 | err = v9fs_fid_insert(ret, dentry); |
| 409 | if (err < 0) { |
| 410 | v9fs_fid_destroy(ret); |
| 411 | goto clunk_fid; |
Latchesar Ionkov | 0b8dd17 | 2005-09-27 21:45:24 -0700 | [diff] [blame] | 412 | } |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 413 | |
| 414 | return ret; |
| 415 | |
| 416 | clunk_fid: |
| 417 | v9fs_t_clunk(v9ses, nfid); |
| 418 | |
| 419 | error: |
| 420 | kfree(fcall); |
| 421 | return ERR_PTR(err); |
| 422 | } |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 423 | */ |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 424 | |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 425 | |
| 426 | /** |
| 427 | * v9fs_clear_inode - release an inode |
| 428 | * @inode: inode to release |
| 429 | * |
| 430 | */ |
| 431 | void v9fs_clear_inode(struct inode *inode) |
| 432 | { |
| 433 | filemap_fdatawrite(inode->i_mapping); |
| 434 | |
| 435 | #ifdef CONFIG_9P_FSCACHE |
| 436 | v9fs_cache_inode_put_cookie(inode); |
| 437 | #endif |
| 438 | } |
| 439 | |
Latchesar Ionkov | 5174fda | 2006-03-25 03:07:25 -0800 | [diff] [blame] | 440 | static struct inode * |
Sripathi Kodi | f085312 | 2010-07-12 20:07:23 +0530 | [diff] [blame] | 441 | v9fs_inode(struct v9fs_session_info *v9ses, struct p9_fid *fid, |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 442 | struct super_block *sb) |
| 443 | { |
| 444 | int err, umode; |
Sripathi Kodi | f085312 | 2010-07-12 20:07:23 +0530 | [diff] [blame] | 445 | struct inode *ret = NULL; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 446 | struct p9_wstat *st; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 447 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 448 | st = p9_client_stat(fid); |
Abhishek Kulkarni | 02bc356 | 2009-07-19 13:41:54 -0600 | [diff] [blame] | 449 | if (IS_ERR(st)) |
| 450 | return ERR_CAST(st); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 451 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 452 | umode = p9mode2unixmode(v9ses, st->mode); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 453 | ret = v9fs_get_inode(sb, umode); |
| 454 | if (IS_ERR(ret)) { |
| 455 | err = PTR_ERR(ret); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 456 | goto error; |
| 457 | } |
| 458 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 459 | v9fs_stat2inode(st, ret, sb); |
| 460 | ret->i_ino = v9fs_qid2ino(&st->qid); |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 461 | |
| 462 | #ifdef CONFIG_9P_FSCACHE |
| 463 | v9fs_vcookie_set_qid(ret, &st->qid); |
| 464 | v9fs_cache_inode_get_cookie(ret); |
| 465 | #endif |
Abhishek Kulkarni | 02bc356 | 2009-07-19 13:41:54 -0600 | [diff] [blame] | 466 | p9stat_free(st); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 467 | kfree(st); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 468 | return ret; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 469 | error: |
Abhishek Kulkarni | 02bc356 | 2009-07-19 13:41:54 -0600 | [diff] [blame] | 470 | p9stat_free(st); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 471 | kfree(st); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 472 | return ERR_PTR(err); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 473 | } |
| 474 | |
Sripathi Kodi | f085312 | 2010-07-12 20:07:23 +0530 | [diff] [blame] | 475 | static struct inode * |
| 476 | v9fs_inode_dotl(struct v9fs_session_info *v9ses, struct p9_fid *fid, |
| 477 | struct super_block *sb) |
| 478 | { |
| 479 | struct inode *ret = NULL; |
| 480 | int err; |
| 481 | struct p9_stat_dotl *st; |
| 482 | |
| 483 | st = p9_client_getattr_dotl(fid, P9_STATS_BASIC); |
| 484 | if (IS_ERR(st)) |
| 485 | return ERR_CAST(st); |
| 486 | |
| 487 | ret = v9fs_get_inode(sb, st->st_mode); |
| 488 | if (IS_ERR(ret)) { |
| 489 | err = PTR_ERR(ret); |
| 490 | goto error; |
| 491 | } |
| 492 | |
| 493 | v9fs_stat2inode_dotl(st, ret); |
| 494 | ret->i_ino = v9fs_qid2ino(&st->qid); |
| 495 | #ifdef CONFIG_9P_FSCACHE |
| 496 | v9fs_vcookie_set_qid(ret, &st->qid); |
| 497 | v9fs_cache_inode_get_cookie(ret); |
| 498 | #endif |
| 499 | kfree(st); |
| 500 | return ret; |
| 501 | error: |
| 502 | kfree(st); |
| 503 | return ERR_PTR(err); |
| 504 | } |
| 505 | |
| 506 | /** |
| 507 | * v9fs_inode_from_fid - Helper routine to populate an inode by |
| 508 | * issuing a attribute request |
| 509 | * @v9ses: session information |
| 510 | * @fid: fid to issue attribute request for |
| 511 | * @sb: superblock on which to create inode |
| 512 | * |
| 513 | */ |
| 514 | static inline struct inode * |
| 515 | v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, |
| 516 | struct super_block *sb) |
| 517 | { |
| 518 | if (v9fs_proto_dotl(v9ses)) |
| 519 | return v9fs_inode_dotl(v9ses, fid, sb); |
| 520 | else |
| 521 | return v9fs_inode(v9ses, fid, sb); |
| 522 | } |
| 523 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 524 | /** |
| 525 | * v9fs_remove - helper function to remove files and directories |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 526 | * @dir: directory inode that is being deleted |
| 527 | * @file: dentry that is being deleted |
| 528 | * @rmdir: removing a directory |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 529 | * |
| 530 | */ |
| 531 | |
| 532 | static int v9fs_remove(struct inode *dir, struct dentry *file, int rmdir) |
| 533 | { |
Aneesh Kumar K.V | d994f40 | 2010-03-29 18:14:50 -0500 | [diff] [blame] | 534 | int retval; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 535 | struct inode *file_inode; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 536 | struct p9_fid *v9fid; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 537 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 538 | 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] | 539 | rmdir); |
| 540 | |
| 541 | file_inode = file->d_inode; |
Latchesar Ionkov | c959df9 | 2007-04-23 14:41:11 -0700 | [diff] [blame] | 542 | v9fid = v9fs_fid_clone(file); |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 543 | if (IS_ERR(v9fid)) |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 544 | return PTR_ERR(v9fid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 545 | |
Aneesh Kumar K.V | d994f40 | 2010-03-29 18:14:50 -0500 | [diff] [blame] | 546 | retval = p9_client_remove(v9fid); |
| 547 | if (!retval) |
| 548 | drop_nlink(file_inode); |
| 549 | return retval; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 550 | } |
| 551 | |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 552 | static int |
| 553 | v9fs_open_created(struct inode *inode, struct file *file) |
| 554 | { |
| 555 | return 0; |
| 556 | } |
| 557 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 558 | |
| 559 | /** |
| 560 | * v9fs_create - Create a file |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 561 | * @v9ses: session information |
| 562 | * @dir: directory that dentry is being created in |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 563 | * @dentry: dentry that is being created |
Abhishek Kulkarni | 0e15597 | 2009-07-19 13:41:55 -0600 | [diff] [blame] | 564 | * @extension: 9p2000.u extension string to support devices, etc. |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 565 | * @perm: create permissions |
| 566 | * @mode: open mode |
| 567 | * |
| 568 | */ |
| 569 | static struct p9_fid * |
| 570 | v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir, |
| 571 | struct dentry *dentry, char *extension, u32 perm, u8 mode) |
| 572 | { |
| 573 | int err; |
| 574 | char *name; |
| 575 | struct p9_fid *dfid, *ofid, *fid; |
| 576 | struct inode *inode; |
| 577 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 578 | P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); |
| 579 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 580 | err = 0; |
| 581 | ofid = NULL; |
| 582 | fid = NULL; |
| 583 | name = (char *) dentry->d_name.name; |
Venkateswararao Jujjuri | 6d27e64 | 2010-05-10 18:08:28 +0000 | [diff] [blame] | 584 | dfid = v9fs_fid_lookup(dentry->d_parent); |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 585 | if (IS_ERR(dfid)) { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 586 | err = PTR_ERR(dfid); |
Venkateswararao Jujjuri | 6d27e64 | 2010-05-10 18:08:28 +0000 | [diff] [blame] | 587 | P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); |
| 588 | return ERR_PTR(err); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 589 | } |
| 590 | |
| 591 | /* clone a fid to use for creation */ |
| 592 | ofid = p9_client_walk(dfid, 0, NULL, 1); |
| 593 | if (IS_ERR(ofid)) { |
| 594 | err = PTR_ERR(ofid); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 595 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); |
Venkateswararao Jujjuri | 6d27e64 | 2010-05-10 18:08:28 +0000 | [diff] [blame] | 596 | return ERR_PTR(err); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 597 | } |
| 598 | |
| 599 | err = p9_client_fcreate(ofid, name, perm, mode, extension); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 600 | if (err < 0) { |
| 601 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 602 | goto error; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 603 | } |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 604 | |
| 605 | /* now walk from the parent so we can get unopened fid */ |
Venkateswararao Jujjuri | 6d27e64 | 2010-05-10 18:08:28 +0000 | [diff] [blame] | 606 | fid = p9_client_walk(dfid, 1, &name, 1); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 607 | if (IS_ERR(fid)) { |
| 608 | err = PTR_ERR(fid); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 609 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 610 | fid = NULL; |
| 611 | goto error; |
Venkateswararao Jujjuri | 6d27e64 | 2010-05-10 18:08:28 +0000 | [diff] [blame] | 612 | } |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 613 | |
| 614 | /* instantiate inode and assign the unopened fid to the dentry */ |
| 615 | inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); |
| 616 | if (IS_ERR(inode)) { |
| 617 | err = PTR_ERR(inode); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 618 | P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", err); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 619 | goto error; |
| 620 | } |
| 621 | |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 622 | if (v9ses->cache) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 623 | dentry->d_op = &v9fs_cached_dentry_operations; |
| 624 | else |
| 625 | dentry->d_op = &v9fs_dentry_operations; |
| 626 | |
| 627 | d_instantiate(dentry, inode); |
Abhishek Kulkarni | 50fb6d2 | 2009-07-19 13:41:57 -0600 | [diff] [blame] | 628 | err = v9fs_fid_add(dentry, fid); |
| 629 | if (err < 0) |
| 630 | goto error; |
| 631 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 632 | return ofid; |
| 633 | |
| 634 | error: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 635 | if (ofid) |
| 636 | p9_client_clunk(ofid); |
| 637 | |
| 638 | if (fid) |
| 639 | p9_client_clunk(fid); |
| 640 | |
| 641 | return ERR_PTR(err); |
| 642 | } |
| 643 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 644 | /** |
| 645 | * v9fs_vfs_create - VFS hook to create files |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 646 | * @dir: directory inode that is being created |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 647 | * @dentry: dentry that is being deleted |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 648 | * @mode: create permissions |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 649 | * @nd: path information |
| 650 | * |
| 651 | */ |
| 652 | |
| 653 | static int |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 654 | v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode, |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 655 | struct nameidata *nd) |
| 656 | { |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 657 | int err; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 658 | u32 perm; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 659 | int flags; |
| 660 | struct v9fs_session_info *v9ses; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 661 | struct p9_fid *fid; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 662 | struct file *filp; |
| 663 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 664 | err = 0; |
| 665 | fid = NULL; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 666 | v9ses = v9fs_inode2v9ses(dir); |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 667 | perm = unixmode2p9mode(v9ses, mode); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 668 | if (nd && nd->flags & LOOKUP_OPEN) |
| 669 | flags = nd->intent.open.flags - 1; |
| 670 | else |
| 671 | flags = O_RDWR; |
| 672 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 673 | fid = v9fs_create(v9ses, dir, dentry, NULL, perm, |
Sripathi Kodi | dd6102f | 2010-03-05 18:48:00 +0000 | [diff] [blame] | 674 | v9fs_uflags2omode(flags, |
| 675 | v9fs_proto_dotu(v9ses))); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 676 | if (IS_ERR(fid)) { |
| 677 | err = PTR_ERR(fid); |
| 678 | fid = NULL; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 679 | goto error; |
| 680 | } |
| 681 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 682 | /* 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] | 683 | if (nd && nd->flags & LOOKUP_OPEN) { |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 684 | filp = lookup_instantiate_filp(nd, dentry, v9fs_open_created); |
| 685 | if (IS_ERR(filp)) { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 686 | err = PTR_ERR(filp); |
| 687 | goto error; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 688 | } |
| 689 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 690 | filp->private_data = fid; |
| 691 | } else |
| 692 | p9_client_clunk(fid); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 693 | |
| 694 | return 0; |
| 695 | |
| 696 | error: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 697 | if (fid) |
| 698 | p9_client_clunk(fid); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 699 | |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 700 | return err; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 701 | } |
| 702 | |
| 703 | /** |
| 704 | * v9fs_vfs_mkdir - VFS mkdir hook to create a directory |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 705 | * @dir: inode that is being unlinked |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 706 | * @dentry: dentry that is being unlinked |
| 707 | * @mode: mode for new directory |
| 708 | * |
| 709 | */ |
| 710 | |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 711 | 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] | 712 | { |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 713 | int err; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 714 | u32 perm; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 715 | struct v9fs_session_info *v9ses; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 716 | struct p9_fid *fid; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 717 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 718 | P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); |
| 719 | err = 0; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 720 | v9ses = v9fs_inode2v9ses(dir); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 721 | perm = unixmode2p9mode(v9ses, mode | S_IFDIR); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 722 | fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD); |
| 723 | if (IS_ERR(fid)) { |
| 724 | err = PTR_ERR(fid); |
| 725 | fid = NULL; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 726 | } |
| 727 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 728 | if (fid) |
| 729 | p9_client_clunk(fid); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 730 | |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 731 | return err; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 732 | } |
| 733 | |
| 734 | /** |
| 735 | * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode |
| 736 | * @dir: inode that is being walked from |
| 737 | * @dentry: dentry that is being walked to? |
| 738 | * @nameidata: path data |
| 739 | * |
| 740 | */ |
| 741 | |
| 742 | static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, |
| 743 | struct nameidata *nameidata) |
| 744 | { |
| 745 | struct super_block *sb; |
| 746 | struct v9fs_session_info *v9ses; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 747 | struct p9_fid *dfid, *fid; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 748 | struct inode *inode; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 749 | char *name; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 750 | int result = 0; |
| 751 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 752 | 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] | 753 | dir, dentry->d_name.name, dentry, nameidata); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 754 | |
Sripathi Kodi | 11e9b49 | 2010-03-29 18:13:59 -0500 | [diff] [blame] | 755 | if (dentry->d_name.len > NAME_MAX) |
| 756 | return ERR_PTR(-ENAMETOOLONG); |
| 757 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 758 | sb = dir->i_sb; |
| 759 | v9ses = v9fs_inode2v9ses(dir); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 760 | dfid = v9fs_fid_lookup(dentry->d_parent); |
| 761 | if (IS_ERR(dfid)) |
David Howells | e231c2e | 2008-02-07 00:15:26 -0800 | [diff] [blame] | 762 | return ERR_CAST(dfid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 763 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 764 | name = (char *) dentry->d_name.name; |
| 765 | fid = p9_client_walk(dfid, 1, &name, 1); |
| 766 | if (IS_ERR(fid)) { |
| 767 | result = PTR_ERR(fid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 768 | if (result == -ENOENT) { |
Aneesh Kumar K.V | 85e0df2 | 2010-05-14 13:04:39 +0000 | [diff] [blame] | 769 | inode = NULL; |
| 770 | goto inst_out; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 771 | } |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 772 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 773 | return ERR_PTR(result); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 774 | } |
| 775 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 776 | inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); |
| 777 | if (IS_ERR(inode)) { |
| 778 | result = PTR_ERR(inode); |
| 779 | inode = NULL; |
| 780 | goto error; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 781 | } |
| 782 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 783 | result = v9fs_fid_add(dentry, fid); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 784 | if (result < 0) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 785 | goto error; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 786 | |
Aneesh Kumar K.V | 85e0df2 | 2010-05-14 13:04:39 +0000 | [diff] [blame] | 787 | inst_out: |
| 788 | if (v9ses->cache) |
Eric Van Hensbergen | e03abc0 | 2007-02-11 13:21:39 -0600 | [diff] [blame] | 789 | dentry->d_op = &v9fs_cached_dentry_operations; |
| 790 | else |
| 791 | dentry->d_op = &v9fs_dentry_operations; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 792 | |
| 793 | d_add(dentry, inode); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 794 | return NULL; |
| 795 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 796 | error: |
Julien Brunel | 62aa528 | 2008-09-24 16:22:22 -0500 | [diff] [blame] | 797 | p9_client_clunk(fid); |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 798 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 799 | return ERR_PTR(result); |
| 800 | } |
| 801 | |
| 802 | /** |
| 803 | * v9fs_vfs_unlink - VFS unlink hook to delete an inode |
| 804 | * @i: inode that is being unlinked |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 805 | * @d: dentry that is being unlinked |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 806 | * |
| 807 | */ |
| 808 | |
| 809 | static int v9fs_vfs_unlink(struct inode *i, struct dentry *d) |
| 810 | { |
| 811 | return v9fs_remove(i, d, 0); |
| 812 | } |
| 813 | |
| 814 | /** |
| 815 | * v9fs_vfs_rmdir - VFS unlink hook to delete a directory |
| 816 | * @i: inode that is being unlinked |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 817 | * @d: dentry that is being unlinked |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 818 | * |
| 819 | */ |
| 820 | |
| 821 | static int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) |
| 822 | { |
| 823 | return v9fs_remove(i, d, 1); |
| 824 | } |
| 825 | |
| 826 | /** |
| 827 | * v9fs_vfs_rename - VFS hook to rename an inode |
| 828 | * @old_dir: old dir inode |
| 829 | * @old_dentry: old dentry |
| 830 | * @new_dir: new dir inode |
| 831 | * @new_dentry: new dentry |
| 832 | * |
| 833 | */ |
| 834 | |
| 835 | static int |
| 836 | v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry, |
| 837 | struct inode *new_dir, struct dentry *new_dentry) |
| 838 | { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 839 | struct inode *old_inode; |
| 840 | struct v9fs_session_info *v9ses; |
| 841 | struct p9_fid *oldfid; |
| 842 | struct p9_fid *olddirfid; |
| 843 | struct p9_fid *newdirfid; |
| 844 | struct p9_wstat wstat; |
| 845 | int retval; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 846 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 847 | P9_DPRINTK(P9_DEBUG_VFS, "\n"); |
| 848 | retval = 0; |
| 849 | old_inode = old_dentry->d_inode; |
| 850 | v9ses = v9fs_inode2v9ses(old_inode); |
| 851 | oldfid = v9fs_fid_lookup(old_dentry); |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 852 | if (IS_ERR(oldfid)) |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 853 | return PTR_ERR(oldfid); |
| 854 | |
| 855 | olddirfid = v9fs_fid_clone(old_dentry->d_parent); |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 856 | if (IS_ERR(olddirfid)) { |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 857 | retval = PTR_ERR(olddirfid); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 858 | goto done; |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 859 | } |
| 860 | |
| 861 | newdirfid = v9fs_fid_clone(new_dentry->d_parent); |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 862 | if (IS_ERR(newdirfid)) { |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 863 | retval = PTR_ERR(newdirfid); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 864 | goto clunk_olddir; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 865 | } |
| 866 | |
Sripathi Kodi | 4681dbd | 2010-03-25 12:47:26 +0000 | [diff] [blame] | 867 | if (v9fs_proto_dotl(v9ses)) { |
| 868 | retval = p9_client_rename(oldfid, newdirfid, |
| 869 | (char *) new_dentry->d_name.name); |
| 870 | if (retval != -ENOSYS) |
| 871 | goto clunk_newdir; |
| 872 | } |
| 873 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 874 | /* 9P can only handle file rename in the same directory */ |
| 875 | if (memcmp(&olddirfid->qid, &newdirfid->qid, sizeof(newdirfid->qid))) { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 876 | P9_DPRINTK(P9_DEBUG_ERROR, |
| 877 | "old dir and new dir are different\n"); |
Eric Van Hensbergen | 621997c | 2007-01-26 00:57:04 -0800 | [diff] [blame] | 878 | retval = -EXDEV; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 879 | goto clunk_newdir; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 880 | } |
| 881 | |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 882 | v9fs_blank_wstat(&wstat); |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 883 | wstat.muid = v9ses->uname; |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 884 | wstat.name = (char *) new_dentry->d_name.name; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 885 | retval = p9_client_wstat(oldfid, &wstat); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 886 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 887 | clunk_newdir: |
Latchesar Ionkov | 22150c4 | 2007-10-23 13:48:33 -0500 | [diff] [blame] | 888 | p9_client_clunk(newdirfid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 889 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 890 | clunk_olddir: |
Latchesar Ionkov | 22150c4 | 2007-10-23 13:48:33 -0500 | [diff] [blame] | 891 | p9_client_clunk(olddirfid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 892 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 893 | done: |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 894 | return retval; |
| 895 | } |
| 896 | |
| 897 | /** |
Adrian Bunk | 943ffb5 | 2006-01-10 00:10:13 +0100 | [diff] [blame] | 898 | * v9fs_vfs_getattr - retrieve file metadata |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 899 | * @mnt: mount information |
| 900 | * @dentry: file to get attributes on |
| 901 | * @stat: metadata structure to populate |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 902 | * |
| 903 | */ |
| 904 | |
| 905 | static int |
| 906 | v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry, |
| 907 | struct kstat *stat) |
| 908 | { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 909 | int err; |
| 910 | struct v9fs_session_info *v9ses; |
| 911 | struct p9_fid *fid; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 912 | struct p9_wstat *st; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 913 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 914 | P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry); |
| 915 | err = -EPERM; |
| 916 | v9ses = v9fs_inode2v9ses(dentry->d_inode); |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 917 | if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) |
Eric Van Hensbergen | 9523a84 | 2007-07-13 13:01:27 -0500 | [diff] [blame] | 918 | return simple_getattr(mnt, dentry, stat); |
| 919 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 920 | fid = v9fs_fid_lookup(dentry); |
| 921 | if (IS_ERR(fid)) |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 922 | return PTR_ERR(fid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 923 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 924 | st = p9_client_stat(fid); |
| 925 | if (IS_ERR(st)) |
| 926 | return PTR_ERR(st); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 927 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 928 | v9fs_stat2inode(st, dentry->d_inode, dentry->d_inode->i_sb); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 929 | generic_fillattr(dentry->d_inode, stat); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 930 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 931 | kfree(st); |
| 932 | return 0; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 933 | } |
| 934 | |
Sripathi Kodi | f085312 | 2010-07-12 20:07:23 +0530 | [diff] [blame] | 935 | static int |
| 936 | v9fs_vfs_getattr_dotl(struct vfsmount *mnt, struct dentry *dentry, |
| 937 | struct kstat *stat) |
| 938 | { |
| 939 | int err; |
| 940 | struct v9fs_session_info *v9ses; |
| 941 | struct p9_fid *fid; |
| 942 | struct p9_stat_dotl *st; |
| 943 | |
| 944 | P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry); |
| 945 | err = -EPERM; |
| 946 | v9ses = v9fs_inode2v9ses(dentry->d_inode); |
| 947 | if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) |
| 948 | return simple_getattr(mnt, dentry, stat); |
| 949 | |
| 950 | fid = v9fs_fid_lookup(dentry); |
| 951 | if (IS_ERR(fid)) |
| 952 | return PTR_ERR(fid); |
| 953 | |
| 954 | /* Ask for all the fields in stat structure. Server will return |
| 955 | * whatever it supports |
| 956 | */ |
| 957 | |
| 958 | st = p9_client_getattr_dotl(fid, P9_STATS_ALL); |
| 959 | if (IS_ERR(st)) |
| 960 | return PTR_ERR(st); |
| 961 | |
| 962 | v9fs_stat2inode_dotl(st, dentry->d_inode); |
| 963 | generic_fillattr(dentry->d_inode, stat); |
| 964 | /* Change block size to what the server returned */ |
| 965 | stat->blksize = st->st_blksize; |
| 966 | |
| 967 | kfree(st); |
| 968 | return 0; |
| 969 | } |
| 970 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 971 | /** |
| 972 | * v9fs_vfs_setattr - set file metadata |
| 973 | * @dentry: file whose metadata to set |
| 974 | * @iattr: metadata assignment structure |
| 975 | * |
| 976 | */ |
| 977 | |
| 978 | static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr) |
| 979 | { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 980 | int retval; |
| 981 | struct v9fs_session_info *v9ses; |
| 982 | struct p9_fid *fid; |
| 983 | struct p9_wstat wstat; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 984 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 985 | P9_DPRINTK(P9_DEBUG_VFS, "\n"); |
| 986 | retval = -EPERM; |
| 987 | v9ses = v9fs_inode2v9ses(dentry->d_inode); |
| 988 | fid = v9fs_fid_lookup(dentry); |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 989 | if(IS_ERR(fid)) |
| 990 | return PTR_ERR(fid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 991 | |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 992 | v9fs_blank_wstat(&wstat); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 993 | if (iattr->ia_valid & ATTR_MODE) |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 994 | wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 995 | |
| 996 | if (iattr->ia_valid & ATTR_MTIME) |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 997 | wstat.mtime = iattr->ia_mtime.tv_sec; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 998 | |
| 999 | if (iattr->ia_valid & ATTR_ATIME) |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1000 | wstat.atime = iattr->ia_atime.tv_sec; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1001 | |
| 1002 | if (iattr->ia_valid & ATTR_SIZE) |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1003 | wstat.length = iattr->ia_size; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1004 | |
Sripathi Kodi | dd6102f | 2010-03-05 18:48:00 +0000 | [diff] [blame] | 1005 | if (v9fs_proto_dotu(v9ses)) { |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1006 | if (iattr->ia_valid & ATTR_UID) |
| 1007 | wstat.n_uid = iattr->ia_uid; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1008 | |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1009 | if (iattr->ia_valid & ATTR_GID) |
| 1010 | wstat.n_gid = iattr->ia_gid; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1011 | } |
| 1012 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1013 | retval = p9_client_wstat(fid, &wstat); |
| 1014 | if (retval >= 0) |
| 1015 | retval = inode_setattr(dentry->d_inode, iattr); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1016 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1017 | return retval; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1018 | } |
| 1019 | |
| 1020 | /** |
Sripathi Kodi | 87d7845 | 2010-06-18 11:50:10 +0530 | [diff] [blame] | 1021 | * v9fs_vfs_setattr_dotl - set file metadata |
| 1022 | * @dentry: file whose metadata to set |
| 1023 | * @iattr: metadata assignment structure |
| 1024 | * |
| 1025 | */ |
| 1026 | |
| 1027 | static int v9fs_vfs_setattr_dotl(struct dentry *dentry, struct iattr *iattr) |
| 1028 | { |
| 1029 | int retval; |
| 1030 | struct v9fs_session_info *v9ses; |
| 1031 | struct p9_fid *fid; |
| 1032 | struct p9_iattr_dotl p9attr; |
| 1033 | |
| 1034 | P9_DPRINTK(P9_DEBUG_VFS, "\n"); |
| 1035 | |
| 1036 | retval = inode_change_ok(dentry->d_inode, iattr); |
| 1037 | if (retval) |
| 1038 | return retval; |
| 1039 | |
| 1040 | p9attr.valid = iattr->ia_valid; |
| 1041 | p9attr.mode = iattr->ia_mode; |
| 1042 | p9attr.uid = iattr->ia_uid; |
| 1043 | p9attr.gid = iattr->ia_gid; |
| 1044 | p9attr.size = iattr->ia_size; |
| 1045 | p9attr.atime_sec = iattr->ia_atime.tv_sec; |
| 1046 | p9attr.atime_nsec = iattr->ia_atime.tv_nsec; |
| 1047 | p9attr.mtime_sec = iattr->ia_mtime.tv_sec; |
| 1048 | p9attr.mtime_nsec = iattr->ia_mtime.tv_nsec; |
| 1049 | |
| 1050 | retval = -EPERM; |
| 1051 | v9ses = v9fs_inode2v9ses(dentry->d_inode); |
| 1052 | fid = v9fs_fid_lookup(dentry); |
| 1053 | if (IS_ERR(fid)) |
| 1054 | return PTR_ERR(fid); |
| 1055 | |
| 1056 | retval = p9_client_setattr(fid, &p9attr); |
| 1057 | if (retval >= 0) |
| 1058 | retval = inode_setattr(dentry->d_inode, iattr); |
| 1059 | |
| 1060 | return retval; |
| 1061 | } |
| 1062 | |
| 1063 | /** |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1064 | * v9fs_stat2inode - populate an inode structure with mistat info |
| 1065 | * @stat: Plan 9 metadata (mistat) structure |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1066 | * @inode: inode to populate |
| 1067 | * @sb: superblock of filesystem |
| 1068 | * |
| 1069 | */ |
| 1070 | |
| 1071 | void |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1072 | v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode, |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1073 | struct super_block *sb) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1074 | { |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1075 | char ext[32]; |
Aneesh Kumar K.V | 5717144 | 2010-03-05 14:43:43 -0600 | [diff] [blame] | 1076 | char tag_name[14]; |
| 1077 | unsigned int i_nlink; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1078 | struct v9fs_session_info *v9ses = sb->s_fs_info; |
| 1079 | |
| 1080 | inode->i_nlink = 1; |
| 1081 | |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1082 | inode->i_atime.tv_sec = stat->atime; |
| 1083 | inode->i_mtime.tv_sec = stat->mtime; |
| 1084 | inode->i_ctime.tv_sec = stat->mtime; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1085 | |
Latchesar Ionkov | bd32b82 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 1086 | inode->i_uid = v9ses->dfltuid; |
| 1087 | inode->i_gid = v9ses->dfltgid; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1088 | |
Sripathi Kodi | dd6102f | 2010-03-05 18:48:00 +0000 | [diff] [blame] | 1089 | if (v9fs_proto_dotu(v9ses)) { |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1090 | inode->i_uid = stat->n_uid; |
| 1091 | inode->i_gid = stat->n_gid; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1092 | } |
Aneesh Kumar K.V | 5717144 | 2010-03-05 14:43:43 -0600 | [diff] [blame] | 1093 | if ((S_ISREG(inode->i_mode)) || (S_ISDIR(inode->i_mode))) { |
| 1094 | if (v9fs_proto_dotu(v9ses) && (stat->extension[0] != '\0')) { |
| 1095 | /* |
| 1096 | * Hadlink support got added later to |
| 1097 | * to the .u extension. So there can be |
| 1098 | * server out there that doesn't support |
| 1099 | * this even with .u extension. So check |
| 1100 | * for non NULL stat->extension |
| 1101 | */ |
| 1102 | strncpy(ext, stat->extension, sizeof(ext)); |
| 1103 | /* HARDLINKCOUNT %u */ |
| 1104 | sscanf(ext, "%13s %u", tag_name, &i_nlink); |
| 1105 | if (!strncmp(tag_name, "HARDLINKCOUNT", 13)) |
| 1106 | inode->i_nlink = i_nlink; |
| 1107 | } |
| 1108 | } |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1109 | inode->i_mode = p9mode2unixmode(v9ses, stat->mode); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1110 | if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) { |
| 1111 | char type = 0; |
| 1112 | int major = -1; |
| 1113 | int minor = -1; |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1114 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1115 | strncpy(ext, stat->extension, sizeof(ext)); |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1116 | sscanf(ext, "%c %u %u", &type, &major, &minor); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1117 | switch (type) { |
| 1118 | case 'c': |
| 1119 | inode->i_mode &= ~S_IFBLK; |
| 1120 | inode->i_mode |= S_IFCHR; |
| 1121 | break; |
| 1122 | case 'b': |
| 1123 | break; |
| 1124 | default: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1125 | P9_DPRINTK(P9_DEBUG_ERROR, |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1126 | "Unknown special type %c %s\n", type, |
| 1127 | stat->extension); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1128 | }; |
| 1129 | inode->i_rdev = MKDEV(major, minor); |
Magnus Deininger | 57c7b4e | 2008-10-17 12:44:46 -0500 | [diff] [blame] | 1130 | init_special_inode(inode, inode->i_mode, inode->i_rdev); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1131 | } else |
| 1132 | inode->i_rdev = 0; |
| 1133 | |
Abhishek Kulkarni | 7549ae3 | 2009-09-22 11:34:05 -0500 | [diff] [blame] | 1134 | i_size_write(inode, stat->length); |
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 | /* not real number of blocks, but 512 byte ones ... */ |
Abhishek Kulkarni | 7549ae3 | 2009-09-22 11:34:05 -0500 | [diff] [blame] | 1137 | inode->i_blocks = (i_size_read(inode) + 512 - 1) >> 9; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1138 | } |
| 1139 | |
| 1140 | /** |
Sripathi Kodi | f085312 | 2010-07-12 20:07:23 +0530 | [diff] [blame] | 1141 | * v9fs_stat2inode_dotl - populate an inode structure with stat info |
| 1142 | * @stat: stat structure |
| 1143 | * @inode: inode to populate |
| 1144 | * @sb: superblock of filesystem |
| 1145 | * |
| 1146 | */ |
| 1147 | |
| 1148 | void |
| 1149 | v9fs_stat2inode_dotl(struct p9_stat_dotl *stat, struct inode *inode) |
| 1150 | { |
| 1151 | |
| 1152 | if ((stat->st_result_mask & P9_STATS_BASIC) == P9_STATS_BASIC) { |
| 1153 | inode->i_atime.tv_sec = stat->st_atime_sec; |
| 1154 | inode->i_atime.tv_nsec = stat->st_atime_nsec; |
| 1155 | inode->i_mtime.tv_sec = stat->st_mtime_sec; |
| 1156 | inode->i_mtime.tv_nsec = stat->st_mtime_nsec; |
| 1157 | inode->i_ctime.tv_sec = stat->st_ctime_sec; |
| 1158 | inode->i_ctime.tv_nsec = stat->st_ctime_nsec; |
| 1159 | inode->i_uid = stat->st_uid; |
| 1160 | inode->i_gid = stat->st_gid; |
| 1161 | inode->i_nlink = stat->st_nlink; |
| 1162 | inode->i_mode = stat->st_mode; |
| 1163 | inode->i_rdev = new_decode_dev(stat->st_rdev); |
| 1164 | |
| 1165 | if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) |
| 1166 | init_special_inode(inode, inode->i_mode, inode->i_rdev); |
| 1167 | |
| 1168 | i_size_write(inode, stat->st_size); |
| 1169 | inode->i_blocks = stat->st_blocks; |
| 1170 | } else { |
| 1171 | if (stat->st_result_mask & P9_STATS_ATIME) { |
| 1172 | inode->i_atime.tv_sec = stat->st_atime_sec; |
| 1173 | inode->i_atime.tv_nsec = stat->st_atime_nsec; |
| 1174 | } |
| 1175 | if (stat->st_result_mask & P9_STATS_MTIME) { |
| 1176 | inode->i_mtime.tv_sec = stat->st_mtime_sec; |
| 1177 | inode->i_mtime.tv_nsec = stat->st_mtime_nsec; |
| 1178 | } |
| 1179 | if (stat->st_result_mask & P9_STATS_CTIME) { |
| 1180 | inode->i_ctime.tv_sec = stat->st_ctime_sec; |
| 1181 | inode->i_ctime.tv_nsec = stat->st_ctime_nsec; |
| 1182 | } |
| 1183 | if (stat->st_result_mask & P9_STATS_UID) |
| 1184 | inode->i_uid = stat->st_uid; |
| 1185 | if (stat->st_result_mask & P9_STATS_GID) |
| 1186 | inode->i_gid = stat->st_gid; |
| 1187 | if (stat->st_result_mask & P9_STATS_NLINK) |
| 1188 | inode->i_nlink = stat->st_nlink; |
| 1189 | if (stat->st_result_mask & P9_STATS_MODE) { |
| 1190 | inode->i_mode = stat->st_mode; |
| 1191 | if ((S_ISBLK(inode->i_mode)) || |
| 1192 | (S_ISCHR(inode->i_mode))) |
| 1193 | init_special_inode(inode, inode->i_mode, |
| 1194 | inode->i_rdev); |
| 1195 | } |
| 1196 | if (stat->st_result_mask & P9_STATS_RDEV) |
| 1197 | inode->i_rdev = new_decode_dev(stat->st_rdev); |
| 1198 | if (stat->st_result_mask & P9_STATS_SIZE) |
| 1199 | i_size_write(inode, stat->st_size); |
| 1200 | if (stat->st_result_mask & P9_STATS_BLOCKS) |
| 1201 | inode->i_blocks = stat->st_blocks; |
| 1202 | } |
| 1203 | if (stat->st_result_mask & P9_STATS_GEN) |
| 1204 | inode->i_generation = stat->st_gen; |
| 1205 | |
| 1206 | /* Currently we don't support P9_STATS_BTIME and P9_STATS_DATA_VERSION |
| 1207 | * because the inode structure does not have fields for them. |
| 1208 | */ |
| 1209 | } |
| 1210 | |
| 1211 | /** |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1212 | * v9fs_qid2ino - convert qid into inode number |
| 1213 | * @qid: qid to hash |
| 1214 | * |
| 1215 | * BUG: potential for inode number collisions? |
| 1216 | */ |
| 1217 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1218 | ino_t v9fs_qid2ino(struct p9_qid *qid) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1219 | { |
| 1220 | u64 path = qid->path + 2; |
| 1221 | ino_t i = 0; |
| 1222 | |
| 1223 | if (sizeof(ino_t) == sizeof(path)) |
| 1224 | memcpy(&i, &path, sizeof(ino_t)); |
| 1225 | else |
| 1226 | i = (ino_t) (path ^ (path >> 32)); |
| 1227 | |
| 1228 | return i; |
| 1229 | } |
| 1230 | |
| 1231 | /** |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1232 | * v9fs_readlink - read a symlink's location (internal version) |
| 1233 | * @dentry: dentry for symlink |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 1234 | * @buffer: buffer to load symlink location into |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1235 | * @buflen: length of buffer |
| 1236 | * |
| 1237 | */ |
| 1238 | |
| 1239 | static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen) |
| 1240 | { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1241 | int retval; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1242 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1243 | struct v9fs_session_info *v9ses; |
| 1244 | struct p9_fid *fid; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1245 | struct p9_wstat *st; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1246 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1247 | P9_DPRINTK(P9_DEBUG_VFS, " %s\n", dentry->d_name.name); |
| 1248 | retval = -EPERM; |
| 1249 | v9ses = v9fs_inode2v9ses(dentry->d_inode); |
| 1250 | fid = v9fs_fid_lookup(dentry); |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 1251 | if (IS_ERR(fid)) |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 1252 | return PTR_ERR(fid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1253 | |
Venkateswararao Jujjuri (JV) | 50cc42f | 2010-06-09 15:59:31 -0700 | [diff] [blame] | 1254 | if (!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses)) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1255 | return -EBADF; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1256 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1257 | st = p9_client_stat(fid); |
| 1258 | if (IS_ERR(st)) |
| 1259 | return PTR_ERR(st); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1260 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1261 | if (!(st->mode & P9_DMSYMLINK)) { |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1262 | retval = -EINVAL; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1263 | goto done; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1264 | } |
| 1265 | |
| 1266 | /* copy extension buffer into buffer */ |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1267 | strncpy(buffer, st->extension, buflen); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1268 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1269 | P9_DPRINTK(P9_DEBUG_VFS, |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1270 | "%s -> %s (%s)\n", dentry->d_name.name, st->extension, buffer); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1271 | |
Martin Stava | 2511cd0 | 2009-11-02 08:39:34 -0600 | [diff] [blame] | 1272 | retval = strnlen(buffer, buflen); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1273 | done: |
| 1274 | kfree(st); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1275 | return retval; |
| 1276 | } |
| 1277 | |
| 1278 | /** |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1279 | * v9fs_vfs_follow_link - follow a symlink path |
| 1280 | * @dentry: dentry for symlink |
| 1281 | * @nd: nameidata |
| 1282 | * |
| 1283 | */ |
| 1284 | |
| 1285 | static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd) |
| 1286 | { |
| 1287 | int len = 0; |
| 1288 | char *link = __getname(); |
| 1289 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1290 | P9_DPRINTK(P9_DEBUG_VFS, "%s n", dentry->d_name.name); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1291 | |
| 1292 | if (!link) |
| 1293 | link = ERR_PTR(-ENOMEM); |
| 1294 | else { |
Latchesar Ionkov | 16cce6d | 2006-03-25 03:07:26 -0800 | [diff] [blame] | 1295 | len = v9fs_readlink(dentry, link, PATH_MAX); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1296 | |
| 1297 | if (len < 0) { |
Davi Arnaut | ce44eeb | 2005-11-07 00:59:36 -0800 | [diff] [blame] | 1298 | __putname(link); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1299 | link = ERR_PTR(len); |
| 1300 | } else |
Martin Stava | 2511cd0 | 2009-11-02 08:39:34 -0600 | [diff] [blame] | 1301 | link[min(len, PATH_MAX-1)] = 0; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1302 | } |
| 1303 | nd_set_link(nd, link); |
| 1304 | |
| 1305 | return NULL; |
| 1306 | } |
| 1307 | |
| 1308 | /** |
| 1309 | * v9fs_vfs_put_link - release a symlink path |
| 1310 | * @dentry: dentry for symlink |
| 1311 | * @nd: nameidata |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 1312 | * @p: unused |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1313 | * |
| 1314 | */ |
| 1315 | |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 1316 | static void |
| 1317 | 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] | 1318 | { |
| 1319 | char *s = nd_get_link(nd); |
| 1320 | |
Duane Griffin | 6ff2320 | 2008-12-19 16:45:21 -0600 | [diff] [blame] | 1321 | P9_DPRINTK(P9_DEBUG_VFS, " %s %s\n", dentry->d_name.name, |
| 1322 | IS_ERR(s) ? "<error>" : s); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1323 | if (!IS_ERR(s)) |
Davi Arnaut | ce44eeb | 2005-11-07 00:59:36 -0800 | [diff] [blame] | 1324 | __putname(s); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1325 | } |
| 1326 | |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 1327 | /** |
| 1328 | * v9fs_vfs_mkspecial - create a special file |
| 1329 | * @dir: inode to create special file in |
| 1330 | * @dentry: dentry to create |
| 1331 | * @mode: mode to create special file |
| 1332 | * @extension: 9p2000.u format extension string representing special file |
| 1333 | * |
| 1334 | */ |
| 1335 | |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1336 | static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, |
| 1337 | int mode, const char *extension) |
| 1338 | { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1339 | u32 perm; |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1340 | struct v9fs_session_info *v9ses; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1341 | struct p9_fid *fid; |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1342 | |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 1343 | v9ses = v9fs_inode2v9ses(dir); |
Sripathi Kodi | dd6102f | 2010-03-05 18:48:00 +0000 | [diff] [blame] | 1344 | if (!v9fs_proto_dotu(v9ses)) { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1345 | P9_DPRINTK(P9_DEBUG_ERROR, "not extended\n"); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 1346 | return -EPERM; |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1347 | } |
| 1348 | |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 1349 | perm = unixmode2p9mode(v9ses, mode); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1350 | fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm, |
| 1351 | P9_OREAD); |
| 1352 | if (IS_ERR(fid)) |
| 1353 | return PTR_ERR(fid); |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 1354 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1355 | p9_client_clunk(fid); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 1356 | return 0; |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1357 | } |
| 1358 | |
| 1359 | /** |
Venkateswararao Jujjuri (JV) | 50cc42f | 2010-06-09 15:59:31 -0700 | [diff] [blame] | 1360 | * v9fs_vfs_symlink_dotl - helper function to create symlinks |
| 1361 | * @dir: directory inode containing symlink |
| 1362 | * @dentry: dentry for symlink |
| 1363 | * @symname: symlink data |
| 1364 | * |
| 1365 | * See Also: 9P2000.L RFC for more information |
| 1366 | * |
| 1367 | */ |
| 1368 | |
| 1369 | static int |
| 1370 | v9fs_vfs_symlink_dotl(struct inode *dir, struct dentry *dentry, |
| 1371 | const char *symname) |
| 1372 | { |
| 1373 | struct v9fs_session_info *v9ses; |
| 1374 | struct p9_fid *dfid; |
| 1375 | struct p9_fid *fid = NULL; |
| 1376 | struct inode *inode; |
| 1377 | struct p9_qid qid; |
| 1378 | char *name; |
| 1379 | int err; |
| 1380 | gid_t gid; |
| 1381 | |
| 1382 | name = (char *) dentry->d_name.name; |
| 1383 | P9_DPRINTK(P9_DEBUG_VFS, "v9fs_vfs_symlink_dotl : %lu,%s,%s\n", |
| 1384 | dir->i_ino, name, symname); |
| 1385 | v9ses = v9fs_inode2v9ses(dir); |
| 1386 | |
| 1387 | dfid = v9fs_fid_lookup(dentry->d_parent); |
| 1388 | if (IS_ERR(dfid)) { |
| 1389 | err = PTR_ERR(dfid); |
| 1390 | P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); |
| 1391 | return err; |
| 1392 | } |
| 1393 | |
| 1394 | gid = v9fs_get_fsgid_for_create(dir); |
| 1395 | |
| 1396 | if (gid < 0) { |
| 1397 | P9_DPRINTK(P9_DEBUG_VFS, "v9fs_get_egid failed %d\n", gid); |
| 1398 | goto error; |
| 1399 | } |
| 1400 | |
| 1401 | /* Server doesn't alter fid on TSYMLINK. Hence no need to clone it. */ |
| 1402 | err = p9_client_symlink(dfid, name, (char *)symname, gid, &qid); |
| 1403 | |
| 1404 | if (err < 0) { |
| 1405 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_symlink failed %d\n", err); |
| 1406 | goto error; |
| 1407 | } |
| 1408 | |
| 1409 | if (v9ses->cache) { |
| 1410 | /* Now walk from the parent so we can get an unopened fid. */ |
| 1411 | fid = p9_client_walk(dfid, 1, &name, 1); |
| 1412 | if (IS_ERR(fid)) { |
| 1413 | err = PTR_ERR(fid); |
| 1414 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", |
| 1415 | err); |
| 1416 | fid = NULL; |
| 1417 | goto error; |
| 1418 | } |
| 1419 | |
| 1420 | /* instantiate inode and assign the unopened fid to dentry */ |
| 1421 | inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); |
| 1422 | if (IS_ERR(inode)) { |
| 1423 | err = PTR_ERR(inode); |
| 1424 | P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", |
| 1425 | err); |
| 1426 | goto error; |
| 1427 | } |
| 1428 | dentry->d_op = &v9fs_cached_dentry_operations; |
| 1429 | d_instantiate(dentry, inode); |
| 1430 | err = v9fs_fid_add(dentry, fid); |
| 1431 | if (err < 0) |
| 1432 | goto error; |
| 1433 | fid = NULL; |
| 1434 | } else { |
| 1435 | /* Not in cached mode. No need to populate inode with stat */ |
| 1436 | inode = v9fs_get_inode(dir->i_sb, S_IFLNK); |
| 1437 | if (IS_ERR(inode)) { |
| 1438 | err = PTR_ERR(inode); |
| 1439 | goto error; |
| 1440 | } |
| 1441 | dentry->d_op = &v9fs_dentry_operations; |
| 1442 | d_instantiate(dentry, inode); |
| 1443 | } |
| 1444 | |
| 1445 | error: |
| 1446 | if (fid) |
| 1447 | p9_client_clunk(fid); |
| 1448 | |
| 1449 | return err; |
| 1450 | } |
| 1451 | |
| 1452 | /** |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1453 | * v9fs_vfs_symlink - helper function to create symlinks |
| 1454 | * @dir: directory inode containing symlink |
| 1455 | * @dentry: dentry for symlink |
| 1456 | * @symname: symlink data |
| 1457 | * |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 1458 | * See Also: 9P2000.u RFC for more information |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1459 | * |
| 1460 | */ |
| 1461 | |
| 1462 | static int |
| 1463 | v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname) |
| 1464 | { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1465 | P9_DPRINTK(P9_DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino, |
| 1466 | dentry->d_name.name, symname); |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1467 | |
| 1468 | return v9fs_vfs_mkspecial(dir, dentry, S_IFLNK, symname); |
| 1469 | } |
| 1470 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1471 | /** |
| 1472 | * v9fs_vfs_link - create a hardlink |
| 1473 | * @old_dentry: dentry for file to link to |
| 1474 | * @dir: inode destination for new link |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 1475 | * @dentry: dentry for link |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1476 | * |
| 1477 | */ |
| 1478 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1479 | static int |
| 1480 | v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, |
| 1481 | struct dentry *dentry) |
| 1482 | { |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1483 | int retval; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1484 | struct p9_fid *oldfid; |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1485 | char *name; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1486 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1487 | P9_DPRINTK(P9_DEBUG_VFS, |
| 1488 | " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name, |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1489 | old_dentry->d_name.name); |
| 1490 | |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 1491 | oldfid = v9fs_fid_clone(old_dentry); |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 1492 | if (IS_ERR(oldfid)) |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 1493 | return PTR_ERR(oldfid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1494 | |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1495 | name = __getname(); |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 1496 | if (unlikely(!name)) { |
| 1497 | retval = -ENOMEM; |
| 1498 | goto clunk_fid; |
| 1499 | } |
Florin Malita | 0710d36 | 2006-06-25 05:48:31 -0700 | [diff] [blame] | 1500 | |
Latchesar Ionkov | 16cce6d | 2006-03-25 03:07:26 -0800 | [diff] [blame] | 1501 | sprintf(name, "%d\n", oldfid->fid); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1502 | retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name); |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1503 | __putname(name); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1504 | |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 1505 | clunk_fid: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1506 | p9_client_clunk(oldfid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1507 | return retval; |
| 1508 | } |
| 1509 | |
| 1510 | /** |
Eric Van Hensbergen | 09d34ee | 2010-08-02 14:28:09 -0500 | [diff] [blame] | 1511 | * v9fs_vfs_link_dotl - create a hardlink for dotl |
| 1512 | * @old_dentry: dentry for file to link to |
| 1513 | * @dir: inode destination for new link |
| 1514 | * @dentry: dentry for link |
| 1515 | * |
| 1516 | */ |
| 1517 | |
| 1518 | static int |
| 1519 | v9fs_vfs_link_dotl(struct dentry *old_dentry, struct inode *dir, |
| 1520 | struct dentry *dentry) |
| 1521 | { |
| 1522 | int err; |
| 1523 | struct p9_fid *dfid, *oldfid; |
| 1524 | char *name; |
| 1525 | struct v9fs_session_info *v9ses; |
| 1526 | struct dentry *dir_dentry; |
| 1527 | |
| 1528 | P9_DPRINTK(P9_DEBUG_VFS, "dir ino: %lu, old_name: %s, new_name: %s\n", |
| 1529 | dir->i_ino, old_dentry->d_name.name, |
| 1530 | dentry->d_name.name); |
| 1531 | |
| 1532 | v9ses = v9fs_inode2v9ses(dir); |
| 1533 | dir_dentry = v9fs_dentry_from_dir_inode(dir); |
| 1534 | dfid = v9fs_fid_lookup(dir_dentry); |
| 1535 | if (IS_ERR(dfid)) |
| 1536 | return PTR_ERR(dfid); |
| 1537 | |
| 1538 | oldfid = v9fs_fid_lookup(old_dentry); |
| 1539 | if (IS_ERR(oldfid)) |
| 1540 | return PTR_ERR(oldfid); |
| 1541 | |
| 1542 | name = (char *) dentry->d_name.name; |
| 1543 | |
| 1544 | err = p9_client_link(dfid, oldfid, (char *)dentry->d_name.name); |
| 1545 | |
| 1546 | if (err < 0) { |
| 1547 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_link failed %d\n", err); |
| 1548 | return err; |
| 1549 | } |
| 1550 | |
| 1551 | if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { |
| 1552 | /* Get the latest stat info from server. */ |
| 1553 | struct p9_fid *fid; |
| 1554 | struct p9_stat_dotl *st; |
| 1555 | |
| 1556 | fid = v9fs_fid_lookup(old_dentry); |
| 1557 | if (IS_ERR(fid)) |
| 1558 | return PTR_ERR(fid); |
| 1559 | |
| 1560 | st = p9_client_getattr_dotl(fid, P9_STATS_BASIC); |
| 1561 | if (IS_ERR(st)) |
| 1562 | return PTR_ERR(st); |
| 1563 | |
| 1564 | v9fs_stat2inode_dotl(st, old_dentry->d_inode); |
| 1565 | |
| 1566 | kfree(st); |
| 1567 | } else { |
| 1568 | /* Caching disabled. No need to get upto date stat info. |
| 1569 | * This dentry will be released immediately. So, just i_count++ |
| 1570 | */ |
| 1571 | atomic_inc(&old_dentry->d_inode->i_count); |
| 1572 | } |
| 1573 | |
| 1574 | dentry->d_op = old_dentry->d_op; |
| 1575 | d_instantiate(dentry, old_dentry->d_inode); |
| 1576 | |
| 1577 | return err; |
| 1578 | } |
| 1579 | |
| 1580 | /** |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1581 | * v9fs_vfs_mknod - create a special file |
| 1582 | * @dir: inode destination for new link |
| 1583 | * @dentry: dentry for file |
| 1584 | * @mode: mode for creation |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 1585 | * @rdev: device associated with special file |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1586 | * |
| 1587 | */ |
| 1588 | |
| 1589 | static int |
| 1590 | v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev) |
| 1591 | { |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1592 | int retval; |
| 1593 | char *name; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1594 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1595 | P9_DPRINTK(P9_DEBUG_VFS, |
| 1596 | " %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] | 1597 | dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev)); |
| 1598 | |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1599 | if (!new_valid_dev(rdev)) |
| 1600 | return -EINVAL; |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 1601 | |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1602 | name = __getname(); |
Eugene Teo | c0291a0 | 2006-03-25 03:07:27 -0800 | [diff] [blame] | 1603 | if (!name) |
| 1604 | return -ENOMEM; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1605 | /* build extension */ |
| 1606 | if (S_ISBLK(mode)) |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1607 | sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev)); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1608 | else if (S_ISCHR(mode)) |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1609 | sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev)); |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 1610 | else if (S_ISFIFO(mode)) |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1611 | *name = 0; |
Venkateswararao Jujjuri | 75cc5c9 | 2010-05-22 12:20:30 -0500 | [diff] [blame] | 1612 | else if (S_ISSOCK(mode)) |
| 1613 | *name = 0; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1614 | else { |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1615 | __putname(name); |
| 1616 | return -EINVAL; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1617 | } |
| 1618 | |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1619 | retval = v9fs_vfs_mkspecial(dir, dentry, mode, name); |
| 1620 | __putname(name); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1621 | |
| 1622 | return retval; |
| 1623 | } |
| 1624 | |
M. Mohan Kumar | 4b43516 | 2010-06-16 14:27:01 +0530 | [diff] [blame^] | 1625 | /** |
| 1626 | * v9fs_vfs_mknod_dotl - create a special file |
| 1627 | * @dir: inode destination for new link |
| 1628 | * @dentry: dentry for file |
| 1629 | * @mode: mode for creation |
| 1630 | * @rdev: device associated with special file |
| 1631 | * |
| 1632 | */ |
| 1633 | static int |
| 1634 | v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, int mode, |
| 1635 | dev_t rdev) |
| 1636 | { |
| 1637 | int err; |
| 1638 | char *name; |
| 1639 | struct v9fs_session_info *v9ses; |
| 1640 | struct p9_fid *fid = NULL, *dfid = NULL; |
| 1641 | struct inode *inode; |
| 1642 | gid_t gid; |
| 1643 | struct p9_qid qid; |
| 1644 | struct dentry *dir_entry; |
| 1645 | |
| 1646 | P9_DPRINTK(P9_DEBUG_VFS, |
| 1647 | " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino, |
| 1648 | dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev)); |
| 1649 | |
| 1650 | if (!new_valid_dev(rdev)) |
| 1651 | return -EINVAL; |
| 1652 | |
| 1653 | v9ses = v9fs_inode2v9ses(dir); |
| 1654 | dir_dentry = v9fs_dentry_from_dir_inode(dir); |
| 1655 | dfid = v9fs_fid_lookup(dir_entry); |
| 1656 | if (IS_ERR(dfid)) { |
| 1657 | err = PTR_ERR(dfid); |
| 1658 | P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); |
| 1659 | dfid = NULL; |
| 1660 | goto error; |
| 1661 | } |
| 1662 | |
| 1663 | gid = v9fs_get_fsgid_for_create(dir); |
| 1664 | if (gid < 0) { |
| 1665 | P9_DPRINTK(P9_DEBUG_VFS, "v9fs_get_fsgid_for_create failed\n"); |
| 1666 | goto error; |
| 1667 | } |
| 1668 | |
| 1669 | name = (char *) dentry->d_name.name; |
| 1670 | |
| 1671 | err = p9_client_mknod_dotl(dfid, name, mode, rdev, gid, &qid); |
| 1672 | if (err < 0) |
| 1673 | goto error; |
| 1674 | |
| 1675 | /* instantiate inode and assign the unopened fid to the dentry */ |
| 1676 | if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { |
| 1677 | fid = p9_client_walk(dfid, 1, &name, 1); |
| 1678 | if (IS_ERR(fid)) { |
| 1679 | err = PTR_ERR(fid); |
| 1680 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", |
| 1681 | err); |
| 1682 | fid = NULL; |
| 1683 | goto error; |
| 1684 | } |
| 1685 | |
| 1686 | inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); |
| 1687 | if (IS_ERR(inode)) { |
| 1688 | err = PTR_ERR(inode); |
| 1689 | P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", |
| 1690 | err); |
| 1691 | goto error; |
| 1692 | } |
| 1693 | dentry->d_op = &v9fs_cached_dentry_operations; |
| 1694 | d_instantiate(dentry, inode); |
| 1695 | err = v9fs_fid_add(dentry, fid); |
| 1696 | if (err < 0) |
| 1697 | goto error; |
| 1698 | fid = NULL; |
| 1699 | } else { |
| 1700 | /* |
| 1701 | * Not in cached mode. No need to populate inode with stat. |
| 1702 | * socket syscall returns a fd, so we need instantiate |
| 1703 | */ |
| 1704 | inode = v9fs_get_inode(dir->i_sb, mode); |
| 1705 | if (IS_ERR(inode)) { |
| 1706 | err = PTR_ERR(inode); |
| 1707 | goto error; |
| 1708 | } |
| 1709 | dentry->d_op = &v9fs_dentry_operations; |
| 1710 | d_instantiate(dentry, inode); |
| 1711 | } |
| 1712 | |
| 1713 | error: |
| 1714 | if (fid) |
| 1715 | p9_client_clunk(fid); |
| 1716 | return err; |
| 1717 | } |
| 1718 | |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 1719 | static const struct inode_operations v9fs_dir_inode_operations_dotu = { |
| 1720 | .create = v9fs_vfs_create, |
| 1721 | .lookup = v9fs_vfs_lookup, |
| 1722 | .symlink = v9fs_vfs_symlink, |
Venkateswararao Jujjuri (JV) | 50cc42f | 2010-06-09 15:59:31 -0700 | [diff] [blame] | 1723 | .link = v9fs_vfs_link, |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 1724 | .unlink = v9fs_vfs_unlink, |
| 1725 | .mkdir = v9fs_vfs_mkdir, |
| 1726 | .rmdir = v9fs_vfs_rmdir, |
M. Mohan Kumar | 4b43516 | 2010-06-16 14:27:01 +0530 | [diff] [blame^] | 1727 | .mknod = v9fs_vfs_mknod_dotl, |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 1728 | .rename = v9fs_vfs_rename, |
| 1729 | .getattr = v9fs_vfs_getattr, |
| 1730 | .setattr = v9fs_vfs_setattr, |
| 1731 | }; |
| 1732 | |
| 1733 | static const struct inode_operations v9fs_dir_inode_operations_dotl = { |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1734 | .create = v9fs_vfs_create, |
| 1735 | .lookup = v9fs_vfs_lookup, |
Venkateswararao Jujjuri (JV) | 50cc42f | 2010-06-09 15:59:31 -0700 | [diff] [blame] | 1736 | .link = v9fs_vfs_link_dotl, |
| 1737 | .symlink = v9fs_vfs_symlink_dotl, |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1738 | .unlink = v9fs_vfs_unlink, |
| 1739 | .mkdir = v9fs_vfs_mkdir, |
| 1740 | .rmdir = v9fs_vfs_rmdir, |
M. Mohan Kumar | 4b43516 | 2010-06-16 14:27:01 +0530 | [diff] [blame^] | 1741 | .mknod = v9fs_vfs_mknod_dotl, |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1742 | .rename = v9fs_vfs_rename, |
Sripathi Kodi | f085312 | 2010-07-12 20:07:23 +0530 | [diff] [blame] | 1743 | .getattr = v9fs_vfs_getattr_dotl, |
Sripathi Kodi | 87d7845 | 2010-06-18 11:50:10 +0530 | [diff] [blame] | 1744 | .setattr = v9fs_vfs_setattr_dotl, |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1745 | }; |
| 1746 | |
Arjan van de Ven | 754661f | 2007-02-12 00:55:38 -0800 | [diff] [blame] | 1747 | static const struct inode_operations v9fs_dir_inode_operations = { |
Eric Van Hensbergen | b501611 | 2005-09-09 13:04:27 -0700 | [diff] [blame] | 1748 | .create = v9fs_vfs_create, |
| 1749 | .lookup = v9fs_vfs_lookup, |
| 1750 | .unlink = v9fs_vfs_unlink, |
| 1751 | .mkdir = v9fs_vfs_mkdir, |
| 1752 | .rmdir = v9fs_vfs_rmdir, |
| 1753 | .mknod = v9fs_vfs_mknod, |
| 1754 | .rename = v9fs_vfs_rename, |
| 1755 | .getattr = v9fs_vfs_getattr, |
| 1756 | .setattr = v9fs_vfs_setattr, |
| 1757 | }; |
| 1758 | |
Arjan van de Ven | 754661f | 2007-02-12 00:55:38 -0800 | [diff] [blame] | 1759 | static const struct inode_operations v9fs_file_inode_operations = { |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1760 | .getattr = v9fs_vfs_getattr, |
| 1761 | .setattr = v9fs_vfs_setattr, |
| 1762 | }; |
| 1763 | |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 1764 | static const struct inode_operations v9fs_file_inode_operations_dotl = { |
Sripathi Kodi | f085312 | 2010-07-12 20:07:23 +0530 | [diff] [blame] | 1765 | .getattr = v9fs_vfs_getattr_dotl, |
Sripathi Kodi | 87d7845 | 2010-06-18 11:50:10 +0530 | [diff] [blame] | 1766 | .setattr = v9fs_vfs_setattr_dotl, |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 1767 | }; |
| 1768 | |
Arjan van de Ven | 754661f | 2007-02-12 00:55:38 -0800 | [diff] [blame] | 1769 | static const struct inode_operations v9fs_symlink_inode_operations = { |
Al Viro | 204f2f0 | 2009-12-23 00:35:54 -0500 | [diff] [blame] | 1770 | .readlink = generic_readlink, |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1771 | .follow_link = v9fs_vfs_follow_link, |
| 1772 | .put_link = v9fs_vfs_put_link, |
| 1773 | .getattr = v9fs_vfs_getattr, |
| 1774 | .setattr = v9fs_vfs_setattr, |
| 1775 | }; |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 1776 | |
| 1777 | static const struct inode_operations v9fs_symlink_inode_operations_dotl = { |
| 1778 | .readlink = generic_readlink, |
| 1779 | .follow_link = v9fs_vfs_follow_link, |
| 1780 | .put_link = v9fs_vfs_put_link, |
Sripathi Kodi | f085312 | 2010-07-12 20:07:23 +0530 | [diff] [blame] | 1781 | .getattr = v9fs_vfs_getattr_dotl, |
Sripathi Kodi | 87d7845 | 2010-06-18 11:50:10 +0530 | [diff] [blame] | 1782 | .setattr = v9fs_vfs_setattr_dotl, |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 1783 | }; |