Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/fs/9p/vfs_inode.c |
| 3 | * |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 4 | * This file contains vfs inode ops for the 9P2000 protocol. |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 5 | * |
| 6 | * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com> |
| 7 | * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov> |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
Eric Van Hensbergen | 42e8c50 | 2006-03-25 03:07:28 -0800 | [diff] [blame] | 10 | * it under the terms of the GNU General Public License version 2 |
| 11 | * as published by the Free Software Foundation. |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with this program; if not, write to: |
| 20 | * Free Software Foundation |
| 21 | * 51 Franklin Street, Fifth Floor |
| 22 | * Boston, MA 02111-1301 USA |
| 23 | * |
| 24 | */ |
| 25 | |
| 26 | #include <linux/module.h> |
| 27 | #include <linux/errno.h> |
| 28 | #include <linux/fs.h> |
| 29 | #include <linux/file.h> |
| 30 | #include <linux/pagemap.h> |
| 31 | #include <linux/stat.h> |
| 32 | #include <linux/string.h> |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 33 | #include <linux/inet.h> |
| 34 | #include <linux/namei.h> |
| 35 | #include <linux/idr.h> |
Alexey Dobriyan | e8edc6e | 2007-05-21 01:22:52 +0400 | [diff] [blame] | 36 | #include <linux/sched.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 37 | #include <linux/slab.h> |
Aneesh Kumar K.V | ebf4626 | 2010-05-31 13:22:56 +0530 | [diff] [blame] | 38 | #include <linux/xattr.h> |
Aneesh Kumar K.V | 85ff872 | 2010-09-28 00:27:39 +0530 | [diff] [blame] | 39 | #include <linux/posix_acl.h> |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 40 | #include <net/9p/9p.h> |
| 41 | #include <net/9p/client.h> |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 42 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 43 | #include "v9fs.h" |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 44 | #include "v9fs_vfs.h" |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 45 | #include "fid.h" |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 46 | #include "cache.h" |
Aneesh Kumar K.V | ebf4626 | 2010-05-31 13:22:56 +0530 | [diff] [blame] | 47 | #include "xattr.h" |
Aneesh Kumar K.V | 85ff872 | 2010-09-28 00:27:39 +0530 | [diff] [blame] | 48 | #include "acl.h" |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 49 | |
Arjan van de Ven | 754661f | 2007-02-12 00:55:38 -0800 | [diff] [blame] | 50 | static const struct inode_operations v9fs_dir_inode_operations; |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 51 | static const struct inode_operations v9fs_dir_inode_operations_dotu; |
| 52 | static const struct inode_operations v9fs_dir_inode_operations_dotl; |
Arjan van de Ven | 754661f | 2007-02-12 00:55:38 -0800 | [diff] [blame] | 53 | static const struct inode_operations v9fs_file_inode_operations; |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 54 | static const struct inode_operations v9fs_file_inode_operations_dotl; |
Arjan van de Ven | 754661f | 2007-02-12 00:55:38 -0800 | [diff] [blame] | 55 | static const struct inode_operations v9fs_symlink_inode_operations; |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 56 | static const struct inode_operations v9fs_symlink_inode_operations_dotl; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 57 | |
| 58 | /** |
| 59 | * unixmode2p9mode - convert unix mode bits to plan 9 |
| 60 | * @v9ses: v9fs session information |
| 61 | * @mode: mode to convert |
| 62 | * |
| 63 | */ |
| 64 | |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 65 | static int unixmode2p9mode(struct v9fs_session_info *v9ses, int mode) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 66 | { |
| 67 | int res; |
| 68 | res = mode & 0777; |
| 69 | if (S_ISDIR(mode)) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 70 | res |= P9_DMDIR; |
Sripathi Kodi | dd6102f | 2010-03-05 18:48:00 +0000 | [diff] [blame] | 71 | if (v9fs_proto_dotu(v9ses)) { |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 72 | if (S_ISLNK(mode)) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 73 | res |= P9_DMSYMLINK; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 74 | if (v9ses->nodev == 0) { |
| 75 | if (S_ISSOCK(mode)) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 76 | res |= P9_DMSOCKET; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 77 | if (S_ISFIFO(mode)) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 78 | res |= P9_DMNAMEDPIPE; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 79 | if (S_ISBLK(mode)) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 80 | res |= P9_DMDEVICE; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 81 | if (S_ISCHR(mode)) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 82 | res |= P9_DMDEVICE; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 83 | } |
| 84 | |
| 85 | if ((mode & S_ISUID) == S_ISUID) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 86 | res |= P9_DMSETUID; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 87 | if ((mode & S_ISGID) == S_ISGID) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 88 | res |= P9_DMSETGID; |
Anthony Liguori | d199d65 | 2008-02-06 19:25:06 -0600 | [diff] [blame] | 89 | if ((mode & S_ISVTX) == S_ISVTX) |
| 90 | res |= P9_DMSETVTX; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 91 | if ((mode & P9_DMLINK)) |
| 92 | res |= P9_DMLINK; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 93 | } |
| 94 | |
| 95 | return res; |
| 96 | } |
| 97 | |
| 98 | /** |
| 99 | * p9mode2unixmode- convert plan9 mode bits to unix mode bits |
| 100 | * @v9ses: v9fs session information |
| 101 | * @mode: mode to convert |
| 102 | * |
| 103 | */ |
| 104 | |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 105 | static int p9mode2unixmode(struct v9fs_session_info *v9ses, int mode) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 106 | { |
| 107 | int res; |
| 108 | |
| 109 | res = mode & 0777; |
| 110 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 111 | if ((mode & P9_DMDIR) == P9_DMDIR) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 112 | res |= S_IFDIR; |
Sripathi Kodi | dd6102f | 2010-03-05 18:48:00 +0000 | [diff] [blame] | 113 | else if ((mode & P9_DMSYMLINK) && (v9fs_proto_dotu(v9ses))) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 114 | res |= S_IFLNK; |
Sripathi Kodi | dd6102f | 2010-03-05 18:48:00 +0000 | [diff] [blame] | 115 | else if ((mode & P9_DMSOCKET) && (v9fs_proto_dotu(v9ses)) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 116 | && (v9ses->nodev == 0)) |
| 117 | res |= S_IFSOCK; |
Sripathi Kodi | dd6102f | 2010-03-05 18:48:00 +0000 | [diff] [blame] | 118 | else if ((mode & P9_DMNAMEDPIPE) && (v9fs_proto_dotu(v9ses)) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 119 | && (v9ses->nodev == 0)) |
| 120 | res |= S_IFIFO; |
Sripathi Kodi | dd6102f | 2010-03-05 18:48:00 +0000 | [diff] [blame] | 121 | else if ((mode & P9_DMDEVICE) && (v9fs_proto_dotu(v9ses)) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 122 | && (v9ses->nodev == 0)) |
| 123 | res |= S_IFBLK; |
| 124 | else |
| 125 | res |= S_IFREG; |
| 126 | |
Sripathi Kodi | dd6102f | 2010-03-05 18:48:00 +0000 | [diff] [blame] | 127 | if (v9fs_proto_dotu(v9ses)) { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 128 | if ((mode & P9_DMSETUID) == P9_DMSETUID) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 129 | res |= S_ISUID; |
| 130 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 131 | if ((mode & P9_DMSETGID) == P9_DMSETGID) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 132 | res |= S_ISGID; |
Anthony Liguori | d199d65 | 2008-02-06 19:25:06 -0600 | [diff] [blame] | 133 | |
| 134 | if ((mode & P9_DMSETVTX) == P9_DMSETVTX) |
| 135 | res |= S_ISVTX; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 136 | } |
| 137 | |
| 138 | return res; |
| 139 | } |
| 140 | |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 141 | /** |
| 142 | * v9fs_uflags2omode- convert posix open flags to plan 9 mode bits |
| 143 | * @uflags: flags to convert |
Eric Van Hensbergen | 2e4bef4 | 2008-06-24 17:39:39 -0500 | [diff] [blame] | 144 | * @extended: if .u extensions are active |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 145 | */ |
| 146 | |
Eric Van Hensbergen | 2e4bef4 | 2008-06-24 17:39:39 -0500 | [diff] [blame] | 147 | int v9fs_uflags2omode(int uflags, int extended) |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 148 | { |
| 149 | int ret; |
| 150 | |
| 151 | ret = 0; |
| 152 | switch (uflags&3) { |
| 153 | default: |
| 154 | case O_RDONLY: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 155 | ret = P9_OREAD; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 156 | break; |
| 157 | |
| 158 | case O_WRONLY: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 159 | ret = P9_OWRITE; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 160 | break; |
| 161 | |
| 162 | case O_RDWR: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 163 | ret = P9_ORDWR; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 164 | break; |
| 165 | } |
| 166 | |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 167 | if (uflags & O_TRUNC) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 168 | ret |= P9_OTRUNC; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 169 | |
Eric Van Hensbergen | 2e4bef4 | 2008-06-24 17:39:39 -0500 | [diff] [blame] | 170 | if (extended) { |
| 171 | if (uflags & O_EXCL) |
| 172 | ret |= P9_OEXCL; |
| 173 | |
| 174 | if (uflags & O_APPEND) |
| 175 | ret |= P9_OAPPEND; |
| 176 | } |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 177 | |
| 178 | return ret; |
| 179 | } |
| 180 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 181 | /** |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 182 | * v9fs_blank_wstat - helper function to setup a 9P stat structure |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 183 | * @wstat: structure to initialize |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 184 | * |
| 185 | */ |
| 186 | |
M. Mohan Kumar | 7a4439c | 2010-02-08 15:36:48 -0600 | [diff] [blame] | 187 | void |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 188 | v9fs_blank_wstat(struct p9_wstat *wstat) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 189 | { |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 190 | wstat->type = ~0; |
| 191 | wstat->dev = ~0; |
| 192 | wstat->qid.type = ~0; |
| 193 | wstat->qid.version = ~0; |
| 194 | *((long long *)&wstat->qid.path) = ~0; |
| 195 | wstat->mode = ~0; |
| 196 | wstat->atime = ~0; |
| 197 | wstat->mtime = ~0; |
| 198 | wstat->length = ~0; |
| 199 | wstat->name = NULL; |
| 200 | wstat->uid = NULL; |
| 201 | wstat->gid = NULL; |
| 202 | wstat->muid = NULL; |
| 203 | wstat->n_uid = ~0; |
| 204 | wstat->n_gid = ~0; |
| 205 | wstat->n_muid = ~0; |
| 206 | wstat->extension = NULL; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 207 | } |
| 208 | |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 209 | #ifdef CONFIG_9P_FSCACHE |
| 210 | /** |
| 211 | * v9fs_alloc_inode - helper function to allocate an inode |
| 212 | * This callback is executed before setting up the inode so that we |
| 213 | * can associate a vcookie with each inode. |
| 214 | * |
| 215 | */ |
| 216 | |
| 217 | struct inode *v9fs_alloc_inode(struct super_block *sb) |
| 218 | { |
| 219 | struct v9fs_cookie *vcookie; |
| 220 | vcookie = (struct v9fs_cookie *)kmem_cache_alloc(vcookie_cache, |
| 221 | GFP_KERNEL); |
| 222 | if (!vcookie) |
| 223 | return NULL; |
| 224 | |
| 225 | vcookie->fscache = NULL; |
| 226 | vcookie->qid = NULL; |
| 227 | spin_lock_init(&vcookie->lock); |
| 228 | return &vcookie->inode; |
| 229 | } |
| 230 | |
| 231 | /** |
| 232 | * v9fs_destroy_inode - destroy an inode |
| 233 | * |
| 234 | */ |
| 235 | |
| 236 | void v9fs_destroy_inode(struct inode *inode) |
| 237 | { |
| 238 | kmem_cache_free(vcookie_cache, v9fs_inode2cookie(inode)); |
| 239 | } |
| 240 | #endif |
| 241 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 242 | /** |
Eric Van Hensbergen | 09d34ee | 2010-08-02 14:28:09 -0500 | [diff] [blame] | 243 | * v9fs_get_fsgid_for_create - Helper function to get the gid for creating a |
| 244 | * new file system object. This checks the S_ISGID to determine the owning |
| 245 | * group of the new file system object. |
| 246 | */ |
| 247 | |
| 248 | static gid_t v9fs_get_fsgid_for_create(struct inode *dir_inode) |
| 249 | { |
| 250 | BUG_ON(dir_inode == NULL); |
| 251 | |
| 252 | if (dir_inode->i_mode & S_ISGID) { |
| 253 | /* set_gid bit is set.*/ |
| 254 | return dir_inode->i_gid; |
| 255 | } |
| 256 | return current_fsgid(); |
| 257 | } |
| 258 | |
| 259 | /** |
| 260 | * v9fs_dentry_from_dir_inode - helper function to get the dentry from |
| 261 | * dir inode. |
| 262 | * |
| 263 | */ |
| 264 | |
Eric Van Hensbergen | ea137533 | 2010-07-27 14:49:43 -0500 | [diff] [blame] | 265 | static struct dentry *v9fs_dentry_from_dir_inode(struct inode *inode) |
Eric Van Hensbergen | 09d34ee | 2010-08-02 14:28:09 -0500 | [diff] [blame] | 266 | { |
| 267 | struct dentry *dentry; |
| 268 | |
| 269 | spin_lock(&dcache_lock); |
| 270 | /* Directory should have only one entry. */ |
| 271 | BUG_ON(S_ISDIR(inode->i_mode) && !list_is_singular(&inode->i_dentry)); |
| 272 | dentry = list_entry(inode->i_dentry.next, struct dentry, d_alias); |
| 273 | spin_unlock(&dcache_lock); |
| 274 | return dentry; |
| 275 | } |
| 276 | |
| 277 | /** |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 278 | * v9fs_get_inode - helper function to setup an inode |
| 279 | * @sb: superblock |
| 280 | * @mode: mode to setup inode with |
| 281 | * |
| 282 | */ |
| 283 | |
| 284 | struct inode *v9fs_get_inode(struct super_block *sb, int mode) |
| 285 | { |
Abhishek Kulkarni | 2bb5411 | 2009-07-19 13:41:56 -0600 | [diff] [blame] | 286 | int err; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 287 | struct inode *inode; |
Eric Van Hensbergen | b501611 | 2005-09-09 13:04:27 -0700 | [diff] [blame] | 288 | struct v9fs_session_info *v9ses = sb->s_fs_info; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 289 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 290 | 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] | 291 | |
| 292 | inode = new_inode(sb); |
Abhishek Kulkarni | 2bb5411 | 2009-07-19 13:41:56 -0600 | [diff] [blame] | 293 | if (!inode) { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 294 | P9_EPRINTK(KERN_WARNING, "Problem allocating inode\n"); |
Abhishek Kulkarni | 48559b4c | 2009-08-17 16:32:18 -0500 | [diff] [blame] | 295 | return ERR_PTR(-ENOMEM); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 296 | } |
Abhishek Kulkarni | 2bb5411 | 2009-07-19 13:41:56 -0600 | [diff] [blame] | 297 | |
Dmitry Monakhov | 217f206 | 2010-03-04 17:30:57 +0300 | [diff] [blame] | 298 | inode_init_owner(inode, NULL, mode); |
Abhishek Kulkarni | 2bb5411 | 2009-07-19 13:41:56 -0600 | [diff] [blame] | 299 | inode->i_blocks = 0; |
| 300 | inode->i_rdev = 0; |
| 301 | inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; |
| 302 | inode->i_mapping->a_ops = &v9fs_addr_operations; |
| 303 | |
| 304 | switch (mode & S_IFMT) { |
| 305 | case S_IFIFO: |
| 306 | case S_IFBLK: |
| 307 | case S_IFCHR: |
| 308 | case S_IFSOCK: |
M. Mohan Kumar | 4b43516 | 2010-06-16 14:27:01 +0530 | [diff] [blame] | 309 | if (v9fs_proto_dotl(v9ses)) { |
| 310 | inode->i_op = &v9fs_file_inode_operations_dotl; |
| 311 | inode->i_fop = &v9fs_file_operations_dotl; |
| 312 | } else if (v9fs_proto_dotu(v9ses)) { |
| 313 | inode->i_op = &v9fs_file_inode_operations; |
| 314 | inode->i_fop = &v9fs_file_operations; |
| 315 | } else { |
Abhishek Kulkarni | 2bb5411 | 2009-07-19 13:41:56 -0600 | [diff] [blame] | 316 | P9_DPRINTK(P9_DEBUG_ERROR, |
| 317 | "special files without extended mode\n"); |
| 318 | err = -EINVAL; |
| 319 | goto error; |
| 320 | } |
| 321 | init_special_inode(inode, inode->i_mode, inode->i_rdev); |
| 322 | break; |
| 323 | case S_IFREG: |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 324 | if (v9fs_proto_dotl(v9ses)) { |
| 325 | inode->i_op = &v9fs_file_inode_operations_dotl; |
| 326 | inode->i_fop = &v9fs_file_operations_dotl; |
| 327 | } else { |
| 328 | inode->i_op = &v9fs_file_inode_operations; |
| 329 | inode->i_fop = &v9fs_file_operations; |
| 330 | } |
| 331 | |
Abhishek Kulkarni | 2bb5411 | 2009-07-19 13:41:56 -0600 | [diff] [blame] | 332 | break; |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 333 | |
Abhishek Kulkarni | 2bb5411 | 2009-07-19 13:41:56 -0600 | [diff] [blame] | 334 | case S_IFLNK: |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 335 | if (!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses)) { |
| 336 | P9_DPRINTK(P9_DEBUG_ERROR, "extended modes used with " |
| 337 | "legacy protocol.\n"); |
Abhishek Kulkarni | 2bb5411 | 2009-07-19 13:41:56 -0600 | [diff] [blame] | 338 | err = -EINVAL; |
| 339 | goto error; |
| 340 | } |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 341 | |
| 342 | if (v9fs_proto_dotl(v9ses)) |
| 343 | inode->i_op = &v9fs_symlink_inode_operations_dotl; |
| 344 | else |
| 345 | inode->i_op = &v9fs_symlink_inode_operations; |
| 346 | |
Abhishek Kulkarni | 2bb5411 | 2009-07-19 13:41:56 -0600 | [diff] [blame] | 347 | break; |
| 348 | case S_IFDIR: |
| 349 | inc_nlink(inode); |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 350 | if (v9fs_proto_dotl(v9ses)) |
| 351 | inode->i_op = &v9fs_dir_inode_operations_dotl; |
| 352 | else if (v9fs_proto_dotu(v9ses)) |
| 353 | inode->i_op = &v9fs_dir_inode_operations_dotu; |
Abhishek Kulkarni | 2bb5411 | 2009-07-19 13:41:56 -0600 | [diff] [blame] | 354 | else |
| 355 | inode->i_op = &v9fs_dir_inode_operations; |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 356 | |
| 357 | if (v9fs_proto_dotl(v9ses)) |
| 358 | inode->i_fop = &v9fs_dir_operations_dotl; |
| 359 | else |
| 360 | inode->i_fop = &v9fs_dir_operations; |
| 361 | |
Abhishek Kulkarni | 2bb5411 | 2009-07-19 13:41:56 -0600 | [diff] [blame] | 362 | break; |
| 363 | default: |
| 364 | P9_DPRINTK(P9_DEBUG_ERROR, "BAD mode 0x%x S_IFMT 0x%x\n", |
| 365 | mode, mode & S_IFMT); |
| 366 | err = -EINVAL; |
| 367 | goto error; |
| 368 | } |
| 369 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 370 | return inode; |
Abhishek Kulkarni | 2bb5411 | 2009-07-19 13:41:56 -0600 | [diff] [blame] | 371 | |
| 372 | error: |
| 373 | iput(inode); |
| 374 | return ERR_PTR(err); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 375 | } |
| 376 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 377 | /* |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 378 | static struct v9fs_fid* |
| 379 | v9fs_clone_walk(struct v9fs_session_info *v9ses, u32 fid, struct dentry *dentry) |
| 380 | { |
| 381 | int err; |
Mika Kukkonen | 736c4b85 | 2006-12-06 20:36:29 -0800 | [diff] [blame] | 382 | int nfid; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 383 | struct v9fs_fid *ret; |
| 384 | struct v9fs_fcall *fcall; |
| 385 | |
| 386 | nfid = v9fs_get_idpool(&v9ses->fidpool); |
| 387 | if (nfid < 0) { |
| 388 | eprintk(KERN_WARNING, "no free fids available\n"); |
Latchesar Ionkov | 731805b | 2006-03-07 21:55:42 -0800 | [diff] [blame] | 389 | return ERR_PTR(-ENOSPC); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 390 | } |
| 391 | |
| 392 | err = v9fs_t_walk(v9ses, fid, nfid, (char *) dentry->d_name.name, |
| 393 | &fcall); |
| 394 | |
| 395 | if (err < 0) { |
Latchesar Ionkov | 41e5a6a | 2006-05-15 09:44:21 -0700 | [diff] [blame] | 396 | if (fcall && fcall->id == RWALK) |
| 397 | goto clunk_fid; |
| 398 | |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 399 | PRINT_FCALL_ERROR("walk error", fcall); |
| 400 | v9fs_put_idpool(nfid, &v9ses->fidpool); |
| 401 | goto error; |
| 402 | } |
| 403 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 404 | kfree(fcall); |
Latchesar Ionkov | 3cf6429 | 2006-01-08 01:04:58 -0800 | [diff] [blame] | 405 | fcall = NULL; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 406 | ret = v9fs_fid_create(v9ses, nfid); |
| 407 | if (!ret) { |
| 408 | err = -ENOMEM; |
| 409 | goto clunk_fid; |
| 410 | } |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 411 | |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 412 | err = v9fs_fid_insert(ret, dentry); |
| 413 | if (err < 0) { |
| 414 | v9fs_fid_destroy(ret); |
| 415 | goto clunk_fid; |
Latchesar Ionkov | 0b8dd17 | 2005-09-27 21:45:24 -0700 | [diff] [blame] | 416 | } |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 417 | |
| 418 | return ret; |
| 419 | |
| 420 | clunk_fid: |
| 421 | v9fs_t_clunk(v9ses, nfid); |
| 422 | |
| 423 | error: |
| 424 | kfree(fcall); |
| 425 | return ERR_PTR(err); |
| 426 | } |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 427 | */ |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 428 | |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 429 | |
| 430 | /** |
| 431 | * v9fs_clear_inode - release an inode |
| 432 | * @inode: inode to release |
| 433 | * |
| 434 | */ |
Al Viro | b57922d | 2010-06-07 14:34:48 -0400 | [diff] [blame] | 435 | void v9fs_evict_inode(struct inode *inode) |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 436 | { |
Al Viro | b57922d | 2010-06-07 14:34:48 -0400 | [diff] [blame] | 437 | truncate_inode_pages(inode->i_mapping, 0); |
| 438 | end_writeback(inode); |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 439 | filemap_fdatawrite(inode->i_mapping); |
| 440 | |
| 441 | #ifdef CONFIG_9P_FSCACHE |
| 442 | v9fs_cache_inode_put_cookie(inode); |
| 443 | #endif |
| 444 | } |
| 445 | |
Latchesar Ionkov | 5174fda | 2006-03-25 03:07:25 -0800 | [diff] [blame] | 446 | static struct inode * |
Sripathi Kodi | f085312 | 2010-07-12 20:07:23 +0530 | [diff] [blame] | 447 | v9fs_inode(struct v9fs_session_info *v9ses, struct p9_fid *fid, |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 448 | struct super_block *sb) |
| 449 | { |
| 450 | int err, umode; |
Sripathi Kodi | f085312 | 2010-07-12 20:07:23 +0530 | [diff] [blame] | 451 | struct inode *ret = NULL; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 452 | struct p9_wstat *st; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 453 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 454 | st = p9_client_stat(fid); |
Abhishek Kulkarni | 02bc356 | 2009-07-19 13:41:54 -0600 | [diff] [blame] | 455 | if (IS_ERR(st)) |
| 456 | return ERR_CAST(st); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 457 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 458 | umode = p9mode2unixmode(v9ses, st->mode); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 459 | ret = v9fs_get_inode(sb, umode); |
| 460 | if (IS_ERR(ret)) { |
| 461 | err = PTR_ERR(ret); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 462 | goto error; |
| 463 | } |
| 464 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 465 | v9fs_stat2inode(st, ret, sb); |
| 466 | ret->i_ino = v9fs_qid2ino(&st->qid); |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 467 | |
| 468 | #ifdef CONFIG_9P_FSCACHE |
| 469 | v9fs_vcookie_set_qid(ret, &st->qid); |
| 470 | v9fs_cache_inode_get_cookie(ret); |
| 471 | #endif |
Abhishek Kulkarni | 02bc356 | 2009-07-19 13:41:54 -0600 | [diff] [blame] | 472 | p9stat_free(st); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 473 | kfree(st); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 474 | return ret; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 475 | error: |
Abhishek Kulkarni | 02bc356 | 2009-07-19 13:41:54 -0600 | [diff] [blame] | 476 | p9stat_free(st); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 477 | kfree(st); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 478 | return ERR_PTR(err); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 479 | } |
| 480 | |
Sripathi Kodi | f085312 | 2010-07-12 20:07:23 +0530 | [diff] [blame] | 481 | static struct inode * |
| 482 | v9fs_inode_dotl(struct v9fs_session_info *v9ses, struct p9_fid *fid, |
| 483 | struct super_block *sb) |
| 484 | { |
| 485 | struct inode *ret = NULL; |
| 486 | int err; |
| 487 | struct p9_stat_dotl *st; |
| 488 | |
| 489 | st = p9_client_getattr_dotl(fid, P9_STATS_BASIC); |
| 490 | if (IS_ERR(st)) |
| 491 | return ERR_CAST(st); |
| 492 | |
| 493 | ret = v9fs_get_inode(sb, st->st_mode); |
| 494 | if (IS_ERR(ret)) { |
| 495 | err = PTR_ERR(ret); |
| 496 | goto error; |
| 497 | } |
| 498 | |
| 499 | v9fs_stat2inode_dotl(st, ret); |
| 500 | ret->i_ino = v9fs_qid2ino(&st->qid); |
| 501 | #ifdef CONFIG_9P_FSCACHE |
| 502 | v9fs_vcookie_set_qid(ret, &st->qid); |
| 503 | v9fs_cache_inode_get_cookie(ret); |
| 504 | #endif |
Aneesh Kumar K.V | 85ff872 | 2010-09-28 00:27:39 +0530 | [diff] [blame] | 505 | err = v9fs_get_acl(ret, fid); |
| 506 | if (err) { |
| 507 | iput(ret); |
| 508 | goto error; |
| 509 | } |
Sripathi Kodi | f085312 | 2010-07-12 20:07:23 +0530 | [diff] [blame] | 510 | kfree(st); |
| 511 | return ret; |
| 512 | error: |
| 513 | kfree(st); |
| 514 | return ERR_PTR(err); |
| 515 | } |
| 516 | |
| 517 | /** |
| 518 | * v9fs_inode_from_fid - Helper routine to populate an inode by |
| 519 | * issuing a attribute request |
| 520 | * @v9ses: session information |
| 521 | * @fid: fid to issue attribute request for |
| 522 | * @sb: superblock on which to create inode |
| 523 | * |
| 524 | */ |
| 525 | static inline struct inode * |
| 526 | v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, |
| 527 | struct super_block *sb) |
| 528 | { |
| 529 | if (v9fs_proto_dotl(v9ses)) |
| 530 | return v9fs_inode_dotl(v9ses, fid, sb); |
| 531 | else |
| 532 | return v9fs_inode(v9ses, fid, sb); |
| 533 | } |
| 534 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 535 | /** |
| 536 | * v9fs_remove - helper function to remove files and directories |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 537 | * @dir: directory inode that is being deleted |
| 538 | * @file: dentry that is being deleted |
| 539 | * @rmdir: removing a directory |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 540 | * |
| 541 | */ |
| 542 | |
| 543 | static int v9fs_remove(struct inode *dir, struct dentry *file, int rmdir) |
| 544 | { |
Aneesh Kumar K.V | d994f40 | 2010-03-29 18:14:50 -0500 | [diff] [blame] | 545 | int retval; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 546 | struct inode *file_inode; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 547 | struct p9_fid *v9fid; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 548 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 549 | 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] | 550 | rmdir); |
| 551 | |
| 552 | file_inode = file->d_inode; |
Latchesar Ionkov | c959df9 | 2007-04-23 14:41:11 -0700 | [diff] [blame] | 553 | v9fid = v9fs_fid_clone(file); |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 554 | if (IS_ERR(v9fid)) |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 555 | return PTR_ERR(v9fid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 556 | |
Aneesh Kumar K.V | d994f40 | 2010-03-29 18:14:50 -0500 | [diff] [blame] | 557 | retval = p9_client_remove(v9fid); |
| 558 | if (!retval) |
| 559 | drop_nlink(file_inode); |
| 560 | return retval; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 561 | } |
| 562 | |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 563 | static int |
| 564 | v9fs_open_created(struct inode *inode, struct file *file) |
| 565 | { |
| 566 | return 0; |
| 567 | } |
| 568 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 569 | |
| 570 | /** |
| 571 | * v9fs_create - Create a file |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 572 | * @v9ses: session information |
| 573 | * @dir: directory that dentry is being created in |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 574 | * @dentry: dentry that is being created |
Abhishek Kulkarni | 0e15597 | 2009-07-19 13:41:55 -0600 | [diff] [blame] | 575 | * @extension: 9p2000.u extension string to support devices, etc. |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 576 | * @perm: create permissions |
| 577 | * @mode: open mode |
| 578 | * |
| 579 | */ |
| 580 | static struct p9_fid * |
| 581 | v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir, |
| 582 | struct dentry *dentry, char *extension, u32 perm, u8 mode) |
| 583 | { |
| 584 | int err; |
| 585 | char *name; |
| 586 | struct p9_fid *dfid, *ofid, *fid; |
| 587 | struct inode *inode; |
| 588 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 589 | P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); |
| 590 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 591 | err = 0; |
| 592 | ofid = NULL; |
| 593 | fid = NULL; |
| 594 | name = (char *) dentry->d_name.name; |
Venkateswararao Jujjuri | 6d27e64 | 2010-05-10 18:08:28 +0000 | [diff] [blame] | 595 | dfid = v9fs_fid_lookup(dentry->d_parent); |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 596 | if (IS_ERR(dfid)) { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 597 | err = PTR_ERR(dfid); |
Venkateswararao Jujjuri | 6d27e64 | 2010-05-10 18:08:28 +0000 | [diff] [blame] | 598 | P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); |
| 599 | return ERR_PTR(err); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 600 | } |
| 601 | |
| 602 | /* clone a fid to use for creation */ |
| 603 | ofid = p9_client_walk(dfid, 0, NULL, 1); |
| 604 | if (IS_ERR(ofid)) { |
| 605 | err = PTR_ERR(ofid); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 606 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); |
Venkateswararao Jujjuri | 6d27e64 | 2010-05-10 18:08:28 +0000 | [diff] [blame] | 607 | return ERR_PTR(err); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 608 | } |
| 609 | |
| 610 | err = p9_client_fcreate(ofid, name, perm, mode, extension); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 611 | if (err < 0) { |
| 612 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 613 | goto error; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 614 | } |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 615 | |
| 616 | /* now walk from the parent so we can get unopened fid */ |
Venkateswararao Jujjuri | 6d27e64 | 2010-05-10 18:08:28 +0000 | [diff] [blame] | 617 | fid = p9_client_walk(dfid, 1, &name, 1); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 618 | if (IS_ERR(fid)) { |
| 619 | err = PTR_ERR(fid); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 620 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 621 | fid = NULL; |
| 622 | goto error; |
Venkateswararao Jujjuri | 6d27e64 | 2010-05-10 18:08:28 +0000 | [diff] [blame] | 623 | } |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 624 | |
| 625 | /* instantiate inode and assign the unopened fid to the dentry */ |
| 626 | inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); |
| 627 | if (IS_ERR(inode)) { |
| 628 | err = PTR_ERR(inode); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 629 | P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", err); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 630 | goto error; |
| 631 | } |
| 632 | |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 633 | if (v9ses->cache) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 634 | dentry->d_op = &v9fs_cached_dentry_operations; |
| 635 | else |
| 636 | dentry->d_op = &v9fs_dentry_operations; |
| 637 | |
| 638 | d_instantiate(dentry, inode); |
Abhishek Kulkarni | 50fb6d2 | 2009-07-19 13:41:57 -0600 | [diff] [blame] | 639 | err = v9fs_fid_add(dentry, fid); |
| 640 | if (err < 0) |
| 641 | goto error; |
| 642 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 643 | return ofid; |
| 644 | |
| 645 | error: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 646 | if (ofid) |
| 647 | p9_client_clunk(ofid); |
| 648 | |
| 649 | if (fid) |
| 650 | p9_client_clunk(fid); |
| 651 | |
| 652 | return ERR_PTR(err); |
| 653 | } |
| 654 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 655 | /** |
Venkateswararao Jujjuri (JV) | 5643135 | 2010-06-17 18:27:46 -0700 | [diff] [blame] | 656 | * v9fs_vfs_create_dotl - VFS hook to create files for 9P2000.L protocol. |
| 657 | * @dir: directory inode that is being created |
| 658 | * @dentry: dentry that is being deleted |
| 659 | * @mode: create permissions |
| 660 | * @nd: path information |
| 661 | * |
| 662 | */ |
| 663 | |
| 664 | static int |
Aneesh Kumar K.V | ad77dbc | 2010-09-28 00:27:40 +0530 | [diff] [blame^] | 665 | v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, int omode, |
Venkateswararao Jujjuri (JV) | 5643135 | 2010-06-17 18:27:46 -0700 | [diff] [blame] | 666 | struct nameidata *nd) |
| 667 | { |
| 668 | int err = 0; |
| 669 | char *name = NULL; |
| 670 | gid_t gid; |
| 671 | int flags; |
Aneesh Kumar K.V | ad77dbc | 2010-09-28 00:27:40 +0530 | [diff] [blame^] | 672 | mode_t mode; |
Venkateswararao Jujjuri (JV) | 5643135 | 2010-06-17 18:27:46 -0700 | [diff] [blame] | 673 | struct v9fs_session_info *v9ses; |
| 674 | struct p9_fid *fid = NULL; |
| 675 | struct p9_fid *dfid, *ofid; |
| 676 | struct file *filp; |
| 677 | struct p9_qid qid; |
| 678 | struct inode *inode; |
Aneesh Kumar K.V | ad77dbc | 2010-09-28 00:27:40 +0530 | [diff] [blame^] | 679 | struct posix_acl *pacl = NULL, *dacl = NULL; |
Venkateswararao Jujjuri (JV) | 5643135 | 2010-06-17 18:27:46 -0700 | [diff] [blame] | 680 | |
| 681 | v9ses = v9fs_inode2v9ses(dir); |
| 682 | if (nd && nd->flags & LOOKUP_OPEN) |
| 683 | flags = nd->intent.open.flags - 1; |
| 684 | else |
| 685 | flags = O_RDWR; |
| 686 | |
| 687 | name = (char *) dentry->d_name.name; |
| 688 | P9_DPRINTK(P9_DEBUG_VFS, "v9fs_vfs_create_dotl: name:%s flags:0x%x " |
Aneesh Kumar K.V | ad77dbc | 2010-09-28 00:27:40 +0530 | [diff] [blame^] | 689 | "mode:0x%x\n", name, flags, omode); |
Venkateswararao Jujjuri (JV) | 5643135 | 2010-06-17 18:27:46 -0700 | [diff] [blame] | 690 | |
| 691 | dfid = v9fs_fid_lookup(dentry->d_parent); |
| 692 | if (IS_ERR(dfid)) { |
| 693 | err = PTR_ERR(dfid); |
| 694 | P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); |
| 695 | return err; |
| 696 | } |
| 697 | |
| 698 | /* clone a fid to use for creation */ |
| 699 | ofid = p9_client_walk(dfid, 0, NULL, 1); |
| 700 | if (IS_ERR(ofid)) { |
| 701 | err = PTR_ERR(ofid); |
| 702 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); |
| 703 | return err; |
| 704 | } |
| 705 | |
| 706 | gid = v9fs_get_fsgid_for_create(dir); |
Aneesh Kumar K.V | ad77dbc | 2010-09-28 00:27:40 +0530 | [diff] [blame^] | 707 | |
| 708 | mode = omode; |
| 709 | /* Update mode based on ACL value */ |
| 710 | err = v9fs_acl_mode(dir, &mode, &dacl, &pacl); |
| 711 | if (err) { |
| 712 | P9_DPRINTK(P9_DEBUG_VFS, |
| 713 | "Failed to get acl values in creat %d\n", err); |
| 714 | goto error; |
| 715 | } |
Venkateswararao Jujjuri (JV) | 5643135 | 2010-06-17 18:27:46 -0700 | [diff] [blame] | 716 | err = p9_client_create_dotl(ofid, name, flags, mode, gid, &qid); |
| 717 | if (err < 0) { |
| 718 | P9_DPRINTK(P9_DEBUG_VFS, |
| 719 | "p9_client_open_dotl failed in creat %d\n", |
| 720 | err); |
| 721 | goto error; |
| 722 | } |
Aneesh Kumar K.V | ad77dbc | 2010-09-28 00:27:40 +0530 | [diff] [blame^] | 723 | /* instantiate inode and assign the unopened fid to the dentry */ |
| 724 | if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE || |
| 725 | (nd && nd->flags & LOOKUP_OPEN)) { |
| 726 | fid = p9_client_walk(dfid, 1, &name, 1); |
| 727 | if (IS_ERR(fid)) { |
| 728 | err = PTR_ERR(fid); |
| 729 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", |
| 730 | err); |
| 731 | fid = NULL; |
| 732 | goto error; |
| 733 | } |
Venkateswararao Jujjuri (JV) | 5643135 | 2010-06-17 18:27:46 -0700 | [diff] [blame] | 734 | |
Aneesh Kumar K.V | ad77dbc | 2010-09-28 00:27:40 +0530 | [diff] [blame^] | 735 | inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); |
| 736 | if (IS_ERR(inode)) { |
| 737 | err = PTR_ERR(inode); |
| 738 | P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", |
| 739 | err); |
| 740 | goto error; |
| 741 | } |
Aneesh Kumar K.V | 3c30750 | 2010-08-30 16:04:35 +0000 | [diff] [blame] | 742 | dentry->d_op = &v9fs_cached_dentry_operations; |
Aneesh Kumar K.V | ad77dbc | 2010-09-28 00:27:40 +0530 | [diff] [blame^] | 743 | d_instantiate(dentry, inode); |
| 744 | err = v9fs_fid_add(dentry, fid); |
| 745 | if (err < 0) |
| 746 | goto error; |
| 747 | /* The fid would get clunked via a dput */ |
| 748 | fid = NULL; |
| 749 | } else { |
| 750 | /* |
| 751 | * Not in cached mode. No need to populate |
| 752 | * inode with stat. We need to get an inode |
| 753 | * so that we can set the acl with dentry |
| 754 | */ |
| 755 | inode = v9fs_get_inode(dir->i_sb, mode); |
| 756 | if (IS_ERR(inode)) { |
| 757 | err = PTR_ERR(inode); |
| 758 | goto error; |
| 759 | } |
Aneesh Kumar K.V | 3c30750 | 2010-08-30 16:04:35 +0000 | [diff] [blame] | 760 | dentry->d_op = &v9fs_dentry_operations; |
Aneesh Kumar K.V | ad77dbc | 2010-09-28 00:27:40 +0530 | [diff] [blame^] | 761 | d_instantiate(dentry, inode); |
| 762 | } |
| 763 | /* Now set the ACL based on the default value */ |
| 764 | v9fs_set_create_acl(dentry, dacl, pacl); |
Venkateswararao Jujjuri (JV) | 5643135 | 2010-06-17 18:27:46 -0700 | [diff] [blame] | 765 | |
| 766 | /* if we are opening a file, assign the open fid to the file */ |
| 767 | if (nd && nd->flags & LOOKUP_OPEN) { |
| 768 | filp = lookup_instantiate_filp(nd, dentry, v9fs_open_created); |
| 769 | if (IS_ERR(filp)) { |
| 770 | p9_client_clunk(ofid); |
| 771 | return PTR_ERR(filp); |
| 772 | } |
| 773 | filp->private_data = ofid; |
| 774 | } else |
| 775 | p9_client_clunk(ofid); |
| 776 | |
| 777 | return 0; |
| 778 | |
| 779 | error: |
| 780 | if (ofid) |
| 781 | p9_client_clunk(ofid); |
| 782 | if (fid) |
| 783 | p9_client_clunk(fid); |
| 784 | return err; |
| 785 | } |
| 786 | |
| 787 | /** |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 788 | * v9fs_vfs_create - VFS hook to create files |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 789 | * @dir: directory inode that is being created |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 790 | * @dentry: dentry that is being deleted |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 791 | * @mode: create permissions |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 792 | * @nd: path information |
| 793 | * |
| 794 | */ |
| 795 | |
| 796 | static int |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 797 | v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode, |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 798 | struct nameidata *nd) |
| 799 | { |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 800 | int err; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 801 | u32 perm; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 802 | int flags; |
| 803 | struct v9fs_session_info *v9ses; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 804 | struct p9_fid *fid; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 805 | struct file *filp; |
| 806 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 807 | err = 0; |
| 808 | fid = NULL; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 809 | v9ses = v9fs_inode2v9ses(dir); |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 810 | perm = unixmode2p9mode(v9ses, mode); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 811 | if (nd && nd->flags & LOOKUP_OPEN) |
| 812 | flags = nd->intent.open.flags - 1; |
| 813 | else |
| 814 | flags = O_RDWR; |
| 815 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 816 | fid = v9fs_create(v9ses, dir, dentry, NULL, perm, |
Sripathi Kodi | dd6102f | 2010-03-05 18:48:00 +0000 | [diff] [blame] | 817 | v9fs_uflags2omode(flags, |
| 818 | v9fs_proto_dotu(v9ses))); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 819 | if (IS_ERR(fid)) { |
| 820 | err = PTR_ERR(fid); |
| 821 | fid = NULL; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 822 | goto error; |
| 823 | } |
| 824 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 825 | /* 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] | 826 | if (nd && nd->flags & LOOKUP_OPEN) { |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 827 | filp = lookup_instantiate_filp(nd, dentry, v9fs_open_created); |
| 828 | if (IS_ERR(filp)) { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 829 | err = PTR_ERR(filp); |
| 830 | goto error; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 831 | } |
| 832 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 833 | filp->private_data = fid; |
| 834 | } else |
| 835 | p9_client_clunk(fid); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 836 | |
| 837 | return 0; |
| 838 | |
| 839 | error: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 840 | if (fid) |
| 841 | p9_client_clunk(fid); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 842 | |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 843 | return err; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 844 | } |
| 845 | |
| 846 | /** |
| 847 | * v9fs_vfs_mkdir - VFS mkdir hook to create a directory |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 848 | * @dir: inode that is being unlinked |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 849 | * @dentry: dentry that is being unlinked |
| 850 | * @mode: mode for new directory |
| 851 | * |
| 852 | */ |
| 853 | |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 854 | 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] | 855 | { |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 856 | int err; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 857 | u32 perm; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 858 | struct v9fs_session_info *v9ses; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 859 | struct p9_fid *fid; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 860 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 861 | P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); |
| 862 | err = 0; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 863 | v9ses = v9fs_inode2v9ses(dir); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 864 | perm = unixmode2p9mode(v9ses, mode | S_IFDIR); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 865 | fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD); |
| 866 | if (IS_ERR(fid)) { |
| 867 | err = PTR_ERR(fid); |
| 868 | fid = NULL; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 869 | } |
| 870 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 871 | if (fid) |
| 872 | p9_client_clunk(fid); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 873 | |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 874 | return err; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 875 | } |
| 876 | |
M. Mohan Kumar | 01a622b | 2010-06-16 14:27:22 +0530 | [diff] [blame] | 877 | |
| 878 | /** |
| 879 | * v9fs_vfs_mkdir_dotl - VFS mkdir hook to create a directory |
| 880 | * @dir: inode that is being unlinked |
| 881 | * @dentry: dentry that is being unlinked |
| 882 | * @mode: mode for new directory |
| 883 | * |
| 884 | */ |
| 885 | |
Aneesh Kumar K.V | ad77dbc | 2010-09-28 00:27:40 +0530 | [diff] [blame^] | 886 | static int v9fs_vfs_mkdir_dotl(struct inode *dir, |
| 887 | struct dentry *dentry, int omode) |
M. Mohan Kumar | 01a622b | 2010-06-16 14:27:22 +0530 | [diff] [blame] | 888 | { |
| 889 | int err; |
| 890 | struct v9fs_session_info *v9ses; |
| 891 | struct p9_fid *fid = NULL, *dfid = NULL; |
| 892 | gid_t gid; |
| 893 | char *name; |
Aneesh Kumar K.V | ad77dbc | 2010-09-28 00:27:40 +0530 | [diff] [blame^] | 894 | mode_t mode; |
M. Mohan Kumar | 01a622b | 2010-06-16 14:27:22 +0530 | [diff] [blame] | 895 | struct inode *inode; |
| 896 | struct p9_qid qid; |
| 897 | struct dentry *dir_dentry; |
Aneesh Kumar K.V | ad77dbc | 2010-09-28 00:27:40 +0530 | [diff] [blame^] | 898 | struct posix_acl *dacl = NULL, *pacl = NULL; |
M. Mohan Kumar | 01a622b | 2010-06-16 14:27:22 +0530 | [diff] [blame] | 899 | |
| 900 | P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); |
| 901 | err = 0; |
| 902 | v9ses = v9fs_inode2v9ses(dir); |
| 903 | |
Aneesh Kumar K.V | ad77dbc | 2010-09-28 00:27:40 +0530 | [diff] [blame^] | 904 | omode |= S_IFDIR; |
Harsh Prateek Bora | 7c7298c | 2010-08-18 06:01:52 +0000 | [diff] [blame] | 905 | if (dir->i_mode & S_ISGID) |
Aneesh Kumar K.V | ad77dbc | 2010-09-28 00:27:40 +0530 | [diff] [blame^] | 906 | omode |= S_ISGID; |
| 907 | |
M. Mohan Kumar | 01a622b | 2010-06-16 14:27:22 +0530 | [diff] [blame] | 908 | dir_dentry = v9fs_dentry_from_dir_inode(dir); |
| 909 | dfid = v9fs_fid_lookup(dir_dentry); |
| 910 | if (IS_ERR(dfid)) { |
| 911 | err = PTR_ERR(dfid); |
| 912 | P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); |
| 913 | dfid = NULL; |
| 914 | goto error; |
| 915 | } |
| 916 | |
| 917 | gid = v9fs_get_fsgid_for_create(dir); |
Aneesh Kumar K.V | ad77dbc | 2010-09-28 00:27:40 +0530 | [diff] [blame^] | 918 | mode = omode; |
| 919 | /* Update mode based on ACL value */ |
| 920 | err = v9fs_acl_mode(dir, &mode, &dacl, &pacl); |
| 921 | if (err) { |
| 922 | P9_DPRINTK(P9_DEBUG_VFS, |
| 923 | "Failed to get acl values in mkdir %d\n", err); |
| 924 | goto error; |
| 925 | } |
M. Mohan Kumar | 01a622b | 2010-06-16 14:27:22 +0530 | [diff] [blame] | 926 | name = (char *) dentry->d_name.name; |
| 927 | err = p9_client_mkdir_dotl(dfid, name, mode, gid, &qid); |
| 928 | if (err < 0) |
| 929 | goto error; |
| 930 | |
| 931 | /* instantiate inode and assign the unopened fid to the dentry */ |
| 932 | if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { |
| 933 | fid = p9_client_walk(dfid, 1, &name, 1); |
| 934 | if (IS_ERR(fid)) { |
| 935 | err = PTR_ERR(fid); |
| 936 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", |
| 937 | err); |
| 938 | fid = NULL; |
| 939 | goto error; |
| 940 | } |
| 941 | |
| 942 | inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); |
| 943 | if (IS_ERR(inode)) { |
| 944 | err = PTR_ERR(inode); |
| 945 | P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", |
| 946 | err); |
| 947 | goto error; |
| 948 | } |
| 949 | dentry->d_op = &v9fs_cached_dentry_operations; |
| 950 | d_instantiate(dentry, inode); |
| 951 | err = v9fs_fid_add(dentry, fid); |
| 952 | if (err < 0) |
| 953 | goto error; |
| 954 | fid = NULL; |
Aneesh Kumar K.V | ad77dbc | 2010-09-28 00:27:40 +0530 | [diff] [blame^] | 955 | } else { |
| 956 | /* |
| 957 | * Not in cached mode. No need to populate |
| 958 | * inode with stat. We need to get an inode |
| 959 | * so that we can set the acl with dentry |
| 960 | */ |
| 961 | inode = v9fs_get_inode(dir->i_sb, mode); |
| 962 | if (IS_ERR(inode)) { |
| 963 | err = PTR_ERR(inode); |
| 964 | goto error; |
| 965 | } |
| 966 | dentry->d_op = &v9fs_dentry_operations; |
| 967 | d_instantiate(dentry, inode); |
M. Mohan Kumar | 01a622b | 2010-06-16 14:27:22 +0530 | [diff] [blame] | 968 | } |
Aneesh Kumar K.V | ad77dbc | 2010-09-28 00:27:40 +0530 | [diff] [blame^] | 969 | /* Now set the ACL based on the default value */ |
| 970 | v9fs_set_create_acl(dentry, dacl, pacl); |
| 971 | |
M. Mohan Kumar | 01a622b | 2010-06-16 14:27:22 +0530 | [diff] [blame] | 972 | error: |
| 973 | if (fid) |
| 974 | p9_client_clunk(fid); |
| 975 | return err; |
| 976 | } |
| 977 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 978 | /** |
| 979 | * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode |
| 980 | * @dir: inode that is being walked from |
| 981 | * @dentry: dentry that is being walked to? |
| 982 | * @nameidata: path data |
| 983 | * |
| 984 | */ |
| 985 | |
| 986 | static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, |
| 987 | struct nameidata *nameidata) |
| 988 | { |
| 989 | struct super_block *sb; |
| 990 | struct v9fs_session_info *v9ses; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 991 | struct p9_fid *dfid, *fid; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 992 | struct inode *inode; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 993 | char *name; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 994 | int result = 0; |
| 995 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 996 | 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] | 997 | dir, dentry->d_name.name, dentry, nameidata); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 998 | |
Sripathi Kodi | 11e9b49 | 2010-03-29 18:13:59 -0500 | [diff] [blame] | 999 | if (dentry->d_name.len > NAME_MAX) |
| 1000 | return ERR_PTR(-ENAMETOOLONG); |
| 1001 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1002 | sb = dir->i_sb; |
| 1003 | v9ses = v9fs_inode2v9ses(dir); |
Aneesh Kumar K.V | a534c8d | 2010-06-30 19:18:50 +0530 | [diff] [blame] | 1004 | /* We can walk d_parent because we hold the dir->i_mutex */ |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1005 | dfid = v9fs_fid_lookup(dentry->d_parent); |
| 1006 | if (IS_ERR(dfid)) |
David Howells | e231c2e | 2008-02-07 00:15:26 -0800 | [diff] [blame] | 1007 | return ERR_CAST(dfid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1008 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1009 | name = (char *) dentry->d_name.name; |
| 1010 | fid = p9_client_walk(dfid, 1, &name, 1); |
| 1011 | if (IS_ERR(fid)) { |
| 1012 | result = PTR_ERR(fid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1013 | if (result == -ENOENT) { |
Aneesh Kumar K.V | 85e0df2 | 2010-05-14 13:04:39 +0000 | [diff] [blame] | 1014 | inode = NULL; |
| 1015 | goto inst_out; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1016 | } |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1017 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1018 | return ERR_PTR(result); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1019 | } |
| 1020 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1021 | inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); |
| 1022 | if (IS_ERR(inode)) { |
| 1023 | result = PTR_ERR(inode); |
| 1024 | inode = NULL; |
| 1025 | goto error; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1026 | } |
| 1027 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1028 | result = v9fs_fid_add(dentry, fid); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 1029 | if (result < 0) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1030 | goto error; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 1031 | |
Aneesh Kumar K.V | 85e0df2 | 2010-05-14 13:04:39 +0000 | [diff] [blame] | 1032 | inst_out: |
| 1033 | if (v9ses->cache) |
Eric Van Hensbergen | e03abc0 | 2007-02-11 13:21:39 -0600 | [diff] [blame] | 1034 | dentry->d_op = &v9fs_cached_dentry_operations; |
| 1035 | else |
| 1036 | dentry->d_op = &v9fs_dentry_operations; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1037 | |
| 1038 | d_add(dentry, inode); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1039 | return NULL; |
| 1040 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1041 | error: |
Julien Brunel | 62aa528 | 2008-09-24 16:22:22 -0500 | [diff] [blame] | 1042 | p9_client_clunk(fid); |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 1043 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1044 | return ERR_PTR(result); |
| 1045 | } |
| 1046 | |
| 1047 | /** |
| 1048 | * v9fs_vfs_unlink - VFS unlink hook to delete an inode |
| 1049 | * @i: inode that is being unlinked |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 1050 | * @d: dentry that is being unlinked |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1051 | * |
| 1052 | */ |
| 1053 | |
| 1054 | static int v9fs_vfs_unlink(struct inode *i, struct dentry *d) |
| 1055 | { |
| 1056 | return v9fs_remove(i, d, 0); |
| 1057 | } |
| 1058 | |
| 1059 | /** |
| 1060 | * v9fs_vfs_rmdir - VFS unlink hook to delete a directory |
| 1061 | * @i: inode that is being unlinked |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 1062 | * @d: dentry that is being unlinked |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1063 | * |
| 1064 | */ |
| 1065 | |
| 1066 | static int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) |
| 1067 | { |
| 1068 | return v9fs_remove(i, d, 1); |
| 1069 | } |
| 1070 | |
| 1071 | /** |
| 1072 | * v9fs_vfs_rename - VFS hook to rename an inode |
| 1073 | * @old_dir: old dir inode |
| 1074 | * @old_dentry: old dentry |
| 1075 | * @new_dir: new dir inode |
| 1076 | * @new_dentry: new dentry |
| 1077 | * |
| 1078 | */ |
| 1079 | |
| 1080 | static int |
| 1081 | v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry, |
| 1082 | struct inode *new_dir, struct dentry *new_dentry) |
| 1083 | { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1084 | struct inode *old_inode; |
| 1085 | struct v9fs_session_info *v9ses; |
| 1086 | struct p9_fid *oldfid; |
| 1087 | struct p9_fid *olddirfid; |
| 1088 | struct p9_fid *newdirfid; |
| 1089 | struct p9_wstat wstat; |
| 1090 | int retval; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1091 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1092 | P9_DPRINTK(P9_DEBUG_VFS, "\n"); |
| 1093 | retval = 0; |
| 1094 | old_inode = old_dentry->d_inode; |
| 1095 | v9ses = v9fs_inode2v9ses(old_inode); |
| 1096 | oldfid = v9fs_fid_lookup(old_dentry); |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 1097 | if (IS_ERR(oldfid)) |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 1098 | return PTR_ERR(oldfid); |
| 1099 | |
| 1100 | olddirfid = v9fs_fid_clone(old_dentry->d_parent); |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 1101 | if (IS_ERR(olddirfid)) { |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 1102 | retval = PTR_ERR(olddirfid); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1103 | goto done; |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 1104 | } |
| 1105 | |
| 1106 | newdirfid = v9fs_fid_clone(new_dentry->d_parent); |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 1107 | if (IS_ERR(newdirfid)) { |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 1108 | retval = PTR_ERR(newdirfid); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1109 | goto clunk_olddir; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1110 | } |
| 1111 | |
Aneesh Kumar K.V | a534c8d | 2010-06-30 19:18:50 +0530 | [diff] [blame] | 1112 | down_write(&v9ses->rename_sem); |
Sripathi Kodi | 4681dbd | 2010-03-25 12:47:26 +0000 | [diff] [blame] | 1113 | if (v9fs_proto_dotl(v9ses)) { |
| 1114 | retval = p9_client_rename(oldfid, newdirfid, |
| 1115 | (char *) new_dentry->d_name.name); |
| 1116 | if (retval != -ENOSYS) |
| 1117 | goto clunk_newdir; |
| 1118 | } |
Aneesh Kumar K.V | a534c8d | 2010-06-30 19:18:50 +0530 | [diff] [blame] | 1119 | if (old_dentry->d_parent != new_dentry->d_parent) { |
| 1120 | /* |
| 1121 | * 9P .u can only handle file rename in the same directory |
| 1122 | */ |
Sripathi Kodi | 4681dbd | 2010-03-25 12:47:26 +0000 | [diff] [blame] | 1123 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1124 | P9_DPRINTK(P9_DEBUG_ERROR, |
| 1125 | "old dir and new dir are different\n"); |
Eric Van Hensbergen | 621997c | 2007-01-26 00:57:04 -0800 | [diff] [blame] | 1126 | retval = -EXDEV; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1127 | goto clunk_newdir; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1128 | } |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1129 | v9fs_blank_wstat(&wstat); |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 1130 | wstat.muid = v9ses->uname; |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1131 | wstat.name = (char *) new_dentry->d_name.name; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1132 | retval = p9_client_wstat(oldfid, &wstat); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1133 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1134 | clunk_newdir: |
Aneesh Kumar K.V | a534c8d | 2010-06-30 19:18:50 +0530 | [diff] [blame] | 1135 | if (!retval) |
| 1136 | /* successful rename */ |
| 1137 | d_move(old_dentry, new_dentry); |
| 1138 | up_write(&v9ses->rename_sem); |
Latchesar Ionkov | 22150c4 | 2007-10-23 13:48:33 -0500 | [diff] [blame] | 1139 | p9_client_clunk(newdirfid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1140 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1141 | clunk_olddir: |
Latchesar Ionkov | 22150c4 | 2007-10-23 13:48:33 -0500 | [diff] [blame] | 1142 | p9_client_clunk(olddirfid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1143 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1144 | done: |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1145 | return retval; |
| 1146 | } |
| 1147 | |
| 1148 | /** |
Adrian Bunk | 943ffb5 | 2006-01-10 00:10:13 +0100 | [diff] [blame] | 1149 | * v9fs_vfs_getattr - retrieve file metadata |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 1150 | * @mnt: mount information |
| 1151 | * @dentry: file to get attributes on |
| 1152 | * @stat: metadata structure to populate |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1153 | * |
| 1154 | */ |
| 1155 | |
| 1156 | static int |
| 1157 | v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry, |
| 1158 | struct kstat *stat) |
| 1159 | { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1160 | int err; |
| 1161 | struct v9fs_session_info *v9ses; |
| 1162 | struct p9_fid *fid; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1163 | struct p9_wstat *st; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1164 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1165 | P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry); |
| 1166 | err = -EPERM; |
| 1167 | v9ses = v9fs_inode2v9ses(dentry->d_inode); |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 1168 | if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) |
Eric Van Hensbergen | 9523a84 | 2007-07-13 13:01:27 -0500 | [diff] [blame] | 1169 | return simple_getattr(mnt, dentry, stat); |
| 1170 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1171 | fid = v9fs_fid_lookup(dentry); |
| 1172 | if (IS_ERR(fid)) |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 1173 | return PTR_ERR(fid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1174 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1175 | st = p9_client_stat(fid); |
| 1176 | if (IS_ERR(st)) |
| 1177 | return PTR_ERR(st); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1178 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1179 | v9fs_stat2inode(st, dentry->d_inode, dentry->d_inode->i_sb); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1180 | generic_fillattr(dentry->d_inode, stat); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1181 | |
Latchesar Ionkov | 62b2be5 | 2010-08-24 18:13:59 +0000 | [diff] [blame] | 1182 | p9stat_free(st); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1183 | kfree(st); |
| 1184 | return 0; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1185 | } |
| 1186 | |
Sripathi Kodi | f085312 | 2010-07-12 20:07:23 +0530 | [diff] [blame] | 1187 | static int |
| 1188 | v9fs_vfs_getattr_dotl(struct vfsmount *mnt, struct dentry *dentry, |
| 1189 | struct kstat *stat) |
| 1190 | { |
| 1191 | int err; |
| 1192 | struct v9fs_session_info *v9ses; |
| 1193 | struct p9_fid *fid; |
| 1194 | struct p9_stat_dotl *st; |
| 1195 | |
| 1196 | P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry); |
| 1197 | err = -EPERM; |
| 1198 | v9ses = v9fs_inode2v9ses(dentry->d_inode); |
| 1199 | if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) |
| 1200 | return simple_getattr(mnt, dentry, stat); |
| 1201 | |
| 1202 | fid = v9fs_fid_lookup(dentry); |
| 1203 | if (IS_ERR(fid)) |
| 1204 | return PTR_ERR(fid); |
| 1205 | |
| 1206 | /* Ask for all the fields in stat structure. Server will return |
| 1207 | * whatever it supports |
| 1208 | */ |
| 1209 | |
| 1210 | st = p9_client_getattr_dotl(fid, P9_STATS_ALL); |
| 1211 | if (IS_ERR(st)) |
| 1212 | return PTR_ERR(st); |
| 1213 | |
| 1214 | v9fs_stat2inode_dotl(st, dentry->d_inode); |
| 1215 | generic_fillattr(dentry->d_inode, stat); |
| 1216 | /* Change block size to what the server returned */ |
| 1217 | stat->blksize = st->st_blksize; |
| 1218 | |
| 1219 | kfree(st); |
| 1220 | return 0; |
| 1221 | } |
| 1222 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1223 | /** |
| 1224 | * v9fs_vfs_setattr - set file metadata |
| 1225 | * @dentry: file whose metadata to set |
| 1226 | * @iattr: metadata assignment structure |
| 1227 | * |
| 1228 | */ |
| 1229 | |
| 1230 | static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr) |
| 1231 | { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1232 | int retval; |
| 1233 | struct v9fs_session_info *v9ses; |
| 1234 | struct p9_fid *fid; |
| 1235 | struct p9_wstat wstat; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1236 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1237 | P9_DPRINTK(P9_DEBUG_VFS, "\n"); |
| 1238 | retval = -EPERM; |
| 1239 | v9ses = v9fs_inode2v9ses(dentry->d_inode); |
| 1240 | fid = v9fs_fid_lookup(dentry); |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 1241 | if(IS_ERR(fid)) |
| 1242 | return PTR_ERR(fid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1243 | |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1244 | v9fs_blank_wstat(&wstat); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1245 | if (iattr->ia_valid & ATTR_MODE) |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1246 | wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1247 | |
| 1248 | if (iattr->ia_valid & ATTR_MTIME) |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1249 | wstat.mtime = iattr->ia_mtime.tv_sec; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1250 | |
| 1251 | if (iattr->ia_valid & ATTR_ATIME) |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1252 | wstat.atime = iattr->ia_atime.tv_sec; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1253 | |
| 1254 | if (iattr->ia_valid & ATTR_SIZE) |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1255 | wstat.length = iattr->ia_size; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1256 | |
Sripathi Kodi | dd6102f | 2010-03-05 18:48:00 +0000 | [diff] [blame] | 1257 | if (v9fs_proto_dotu(v9ses)) { |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1258 | if (iattr->ia_valid & ATTR_UID) |
| 1259 | wstat.n_uid = iattr->ia_uid; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1260 | |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1261 | if (iattr->ia_valid & ATTR_GID) |
| 1262 | wstat.n_gid = iattr->ia_gid; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1263 | } |
| 1264 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1265 | retval = p9_client_wstat(fid, &wstat); |
Christoph Hellwig | 1025774 | 2010-06-04 11:30:02 +0200 | [diff] [blame] | 1266 | if (retval < 0) |
| 1267 | return retval; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1268 | |
Christoph Hellwig | 1025774 | 2010-06-04 11:30:02 +0200 | [diff] [blame] | 1269 | if ((iattr->ia_valid & ATTR_SIZE) && |
| 1270 | iattr->ia_size != i_size_read(dentry->d_inode)) { |
| 1271 | retval = vmtruncate(dentry->d_inode, iattr->ia_size); |
| 1272 | if (retval) |
| 1273 | return retval; |
| 1274 | } |
| 1275 | |
| 1276 | setattr_copy(dentry->d_inode, iattr); |
| 1277 | mark_inode_dirty(dentry->d_inode); |
| 1278 | return 0; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1279 | } |
| 1280 | |
| 1281 | /** |
Sripathi Kodi | 87d7845 | 2010-06-18 11:50:10 +0530 | [diff] [blame] | 1282 | * v9fs_vfs_setattr_dotl - set file metadata |
| 1283 | * @dentry: file whose metadata to set |
| 1284 | * @iattr: metadata assignment structure |
| 1285 | * |
| 1286 | */ |
| 1287 | |
Aneesh Kumar K.V | 22d8dcd | 2010-09-28 00:27:40 +0530 | [diff] [blame] | 1288 | int v9fs_vfs_setattr_dotl(struct dentry *dentry, struct iattr *iattr) |
Sripathi Kodi | 87d7845 | 2010-06-18 11:50:10 +0530 | [diff] [blame] | 1289 | { |
| 1290 | int retval; |
| 1291 | struct v9fs_session_info *v9ses; |
| 1292 | struct p9_fid *fid; |
| 1293 | struct p9_iattr_dotl p9attr; |
| 1294 | |
| 1295 | P9_DPRINTK(P9_DEBUG_VFS, "\n"); |
| 1296 | |
| 1297 | retval = inode_change_ok(dentry->d_inode, iattr); |
| 1298 | if (retval) |
| 1299 | return retval; |
| 1300 | |
| 1301 | p9attr.valid = iattr->ia_valid; |
| 1302 | p9attr.mode = iattr->ia_mode; |
| 1303 | p9attr.uid = iattr->ia_uid; |
| 1304 | p9attr.gid = iattr->ia_gid; |
| 1305 | p9attr.size = iattr->ia_size; |
| 1306 | p9attr.atime_sec = iattr->ia_atime.tv_sec; |
| 1307 | p9attr.atime_nsec = iattr->ia_atime.tv_nsec; |
| 1308 | p9attr.mtime_sec = iattr->ia_mtime.tv_sec; |
| 1309 | p9attr.mtime_nsec = iattr->ia_mtime.tv_nsec; |
| 1310 | |
| 1311 | retval = -EPERM; |
| 1312 | v9ses = v9fs_inode2v9ses(dentry->d_inode); |
| 1313 | fid = v9fs_fid_lookup(dentry); |
| 1314 | if (IS_ERR(fid)) |
| 1315 | return PTR_ERR(fid); |
| 1316 | |
| 1317 | retval = p9_client_setattr(fid, &p9attr); |
Stephen Rothwell | 8cef9c6 | 2010-06-22 11:15:01 +1000 | [diff] [blame] | 1318 | if (retval < 0) |
| 1319 | return retval; |
Sripathi Kodi | 87d7845 | 2010-06-18 11:50:10 +0530 | [diff] [blame] | 1320 | |
Stephen Rothwell | 8cef9c6 | 2010-06-22 11:15:01 +1000 | [diff] [blame] | 1321 | if ((iattr->ia_valid & ATTR_SIZE) && |
| 1322 | iattr->ia_size != i_size_read(dentry->d_inode)) { |
| 1323 | retval = vmtruncate(dentry->d_inode, iattr->ia_size); |
| 1324 | if (retval) |
| 1325 | return retval; |
| 1326 | } |
| 1327 | |
| 1328 | setattr_copy(dentry->d_inode, iattr); |
| 1329 | mark_inode_dirty(dentry->d_inode); |
Aneesh Kumar K.V | 6e8dc55 | 2010-09-28 00:27:40 +0530 | [diff] [blame] | 1330 | if (iattr->ia_valid & ATTR_MODE) { |
| 1331 | /* We also want to update ACL when we update mode bits */ |
| 1332 | retval = v9fs_acl_chmod(dentry); |
| 1333 | if (retval < 0) |
| 1334 | return retval; |
| 1335 | } |
Stephen Rothwell | 8cef9c6 | 2010-06-22 11:15:01 +1000 | [diff] [blame] | 1336 | return 0; |
Sripathi Kodi | 87d7845 | 2010-06-18 11:50:10 +0530 | [diff] [blame] | 1337 | } |
| 1338 | |
| 1339 | /** |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1340 | * v9fs_stat2inode - populate an inode structure with mistat info |
| 1341 | * @stat: Plan 9 metadata (mistat) structure |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1342 | * @inode: inode to populate |
| 1343 | * @sb: superblock of filesystem |
| 1344 | * |
| 1345 | */ |
| 1346 | |
| 1347 | void |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1348 | v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode, |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1349 | struct super_block *sb) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1350 | { |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1351 | char ext[32]; |
Aneesh Kumar K.V | 5717144 | 2010-03-05 14:43:43 -0600 | [diff] [blame] | 1352 | char tag_name[14]; |
| 1353 | unsigned int i_nlink; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1354 | struct v9fs_session_info *v9ses = sb->s_fs_info; |
| 1355 | |
| 1356 | inode->i_nlink = 1; |
| 1357 | |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1358 | inode->i_atime.tv_sec = stat->atime; |
| 1359 | inode->i_mtime.tv_sec = stat->mtime; |
| 1360 | inode->i_ctime.tv_sec = stat->mtime; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1361 | |
Latchesar Ionkov | bd32b82 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 1362 | inode->i_uid = v9ses->dfltuid; |
| 1363 | inode->i_gid = v9ses->dfltgid; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1364 | |
Sripathi Kodi | dd6102f | 2010-03-05 18:48:00 +0000 | [diff] [blame] | 1365 | if (v9fs_proto_dotu(v9ses)) { |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1366 | inode->i_uid = stat->n_uid; |
| 1367 | inode->i_gid = stat->n_gid; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1368 | } |
Aneesh Kumar K.V | 5717144 | 2010-03-05 14:43:43 -0600 | [diff] [blame] | 1369 | if ((S_ISREG(inode->i_mode)) || (S_ISDIR(inode->i_mode))) { |
| 1370 | if (v9fs_proto_dotu(v9ses) && (stat->extension[0] != '\0')) { |
| 1371 | /* |
| 1372 | * Hadlink support got added later to |
| 1373 | * to the .u extension. So there can be |
| 1374 | * server out there that doesn't support |
| 1375 | * this even with .u extension. So check |
| 1376 | * for non NULL stat->extension |
| 1377 | */ |
| 1378 | strncpy(ext, stat->extension, sizeof(ext)); |
| 1379 | /* HARDLINKCOUNT %u */ |
| 1380 | sscanf(ext, "%13s %u", tag_name, &i_nlink); |
| 1381 | if (!strncmp(tag_name, "HARDLINKCOUNT", 13)) |
| 1382 | inode->i_nlink = i_nlink; |
| 1383 | } |
| 1384 | } |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1385 | inode->i_mode = p9mode2unixmode(v9ses, stat->mode); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1386 | if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) { |
| 1387 | char type = 0; |
| 1388 | int major = -1; |
| 1389 | int minor = -1; |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1390 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1391 | strncpy(ext, stat->extension, sizeof(ext)); |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1392 | sscanf(ext, "%c %u %u", &type, &major, &minor); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1393 | switch (type) { |
| 1394 | case 'c': |
| 1395 | inode->i_mode &= ~S_IFBLK; |
| 1396 | inode->i_mode |= S_IFCHR; |
| 1397 | break; |
| 1398 | case 'b': |
| 1399 | break; |
| 1400 | default: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1401 | P9_DPRINTK(P9_DEBUG_ERROR, |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1402 | "Unknown special type %c %s\n", type, |
| 1403 | stat->extension); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1404 | }; |
| 1405 | inode->i_rdev = MKDEV(major, minor); |
Magnus Deininger | 57c7b4e | 2008-10-17 12:44:46 -0500 | [diff] [blame] | 1406 | init_special_inode(inode, inode->i_mode, inode->i_rdev); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1407 | } else |
| 1408 | inode->i_rdev = 0; |
| 1409 | |
Abhishek Kulkarni | 7549ae3 | 2009-09-22 11:34:05 -0500 | [diff] [blame] | 1410 | i_size_write(inode, stat->length); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1411 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1412 | /* not real number of blocks, but 512 byte ones ... */ |
Abhishek Kulkarni | 7549ae3 | 2009-09-22 11:34:05 -0500 | [diff] [blame] | 1413 | inode->i_blocks = (i_size_read(inode) + 512 - 1) >> 9; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1414 | } |
| 1415 | |
| 1416 | /** |
Sripathi Kodi | f085312 | 2010-07-12 20:07:23 +0530 | [diff] [blame] | 1417 | * v9fs_stat2inode_dotl - populate an inode structure with stat info |
| 1418 | * @stat: stat structure |
| 1419 | * @inode: inode to populate |
| 1420 | * @sb: superblock of filesystem |
| 1421 | * |
| 1422 | */ |
| 1423 | |
| 1424 | void |
| 1425 | v9fs_stat2inode_dotl(struct p9_stat_dotl *stat, struct inode *inode) |
| 1426 | { |
| 1427 | |
| 1428 | if ((stat->st_result_mask & P9_STATS_BASIC) == P9_STATS_BASIC) { |
| 1429 | inode->i_atime.tv_sec = stat->st_atime_sec; |
| 1430 | inode->i_atime.tv_nsec = stat->st_atime_nsec; |
| 1431 | inode->i_mtime.tv_sec = stat->st_mtime_sec; |
| 1432 | inode->i_mtime.tv_nsec = stat->st_mtime_nsec; |
| 1433 | inode->i_ctime.tv_sec = stat->st_ctime_sec; |
| 1434 | inode->i_ctime.tv_nsec = stat->st_ctime_nsec; |
| 1435 | inode->i_uid = stat->st_uid; |
| 1436 | inode->i_gid = stat->st_gid; |
| 1437 | inode->i_nlink = stat->st_nlink; |
| 1438 | inode->i_mode = stat->st_mode; |
| 1439 | inode->i_rdev = new_decode_dev(stat->st_rdev); |
| 1440 | |
| 1441 | if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) |
| 1442 | init_special_inode(inode, inode->i_mode, inode->i_rdev); |
| 1443 | |
| 1444 | i_size_write(inode, stat->st_size); |
| 1445 | inode->i_blocks = stat->st_blocks; |
| 1446 | } else { |
| 1447 | if (stat->st_result_mask & P9_STATS_ATIME) { |
| 1448 | inode->i_atime.tv_sec = stat->st_atime_sec; |
| 1449 | inode->i_atime.tv_nsec = stat->st_atime_nsec; |
| 1450 | } |
| 1451 | if (stat->st_result_mask & P9_STATS_MTIME) { |
| 1452 | inode->i_mtime.tv_sec = stat->st_mtime_sec; |
| 1453 | inode->i_mtime.tv_nsec = stat->st_mtime_nsec; |
| 1454 | } |
| 1455 | if (stat->st_result_mask & P9_STATS_CTIME) { |
| 1456 | inode->i_ctime.tv_sec = stat->st_ctime_sec; |
| 1457 | inode->i_ctime.tv_nsec = stat->st_ctime_nsec; |
| 1458 | } |
| 1459 | if (stat->st_result_mask & P9_STATS_UID) |
| 1460 | inode->i_uid = stat->st_uid; |
| 1461 | if (stat->st_result_mask & P9_STATS_GID) |
| 1462 | inode->i_gid = stat->st_gid; |
| 1463 | if (stat->st_result_mask & P9_STATS_NLINK) |
| 1464 | inode->i_nlink = stat->st_nlink; |
| 1465 | if (stat->st_result_mask & P9_STATS_MODE) { |
| 1466 | inode->i_mode = stat->st_mode; |
| 1467 | if ((S_ISBLK(inode->i_mode)) || |
| 1468 | (S_ISCHR(inode->i_mode))) |
| 1469 | init_special_inode(inode, inode->i_mode, |
| 1470 | inode->i_rdev); |
| 1471 | } |
| 1472 | if (stat->st_result_mask & P9_STATS_RDEV) |
| 1473 | inode->i_rdev = new_decode_dev(stat->st_rdev); |
| 1474 | if (stat->st_result_mask & P9_STATS_SIZE) |
| 1475 | i_size_write(inode, stat->st_size); |
| 1476 | if (stat->st_result_mask & P9_STATS_BLOCKS) |
| 1477 | inode->i_blocks = stat->st_blocks; |
| 1478 | } |
| 1479 | if (stat->st_result_mask & P9_STATS_GEN) |
| 1480 | inode->i_generation = stat->st_gen; |
| 1481 | |
| 1482 | /* Currently we don't support P9_STATS_BTIME and P9_STATS_DATA_VERSION |
| 1483 | * because the inode structure does not have fields for them. |
| 1484 | */ |
| 1485 | } |
| 1486 | |
| 1487 | /** |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1488 | * v9fs_qid2ino - convert qid into inode number |
| 1489 | * @qid: qid to hash |
| 1490 | * |
| 1491 | * BUG: potential for inode number collisions? |
| 1492 | */ |
| 1493 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1494 | ino_t v9fs_qid2ino(struct p9_qid *qid) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1495 | { |
| 1496 | u64 path = qid->path + 2; |
| 1497 | ino_t i = 0; |
| 1498 | |
| 1499 | if (sizeof(ino_t) == sizeof(path)) |
| 1500 | memcpy(&i, &path, sizeof(ino_t)); |
| 1501 | else |
| 1502 | i = (ino_t) (path ^ (path >> 32)); |
| 1503 | |
| 1504 | return i; |
| 1505 | } |
| 1506 | |
| 1507 | /** |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1508 | * v9fs_readlink - read a symlink's location (internal version) |
| 1509 | * @dentry: dentry for symlink |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 1510 | * @buffer: buffer to load symlink location into |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1511 | * @buflen: length of buffer |
| 1512 | * |
| 1513 | */ |
| 1514 | |
| 1515 | static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen) |
| 1516 | { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1517 | int retval; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1518 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1519 | struct v9fs_session_info *v9ses; |
| 1520 | struct p9_fid *fid; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1521 | struct p9_wstat *st; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1522 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1523 | P9_DPRINTK(P9_DEBUG_VFS, " %s\n", dentry->d_name.name); |
| 1524 | retval = -EPERM; |
| 1525 | v9ses = v9fs_inode2v9ses(dentry->d_inode); |
| 1526 | fid = v9fs_fid_lookup(dentry); |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 1527 | if (IS_ERR(fid)) |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 1528 | return PTR_ERR(fid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1529 | |
Venkateswararao Jujjuri (JV) | 50cc42f | 2010-06-09 15:59:31 -0700 | [diff] [blame] | 1530 | if (!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses)) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1531 | return -EBADF; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1532 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1533 | st = p9_client_stat(fid); |
| 1534 | if (IS_ERR(st)) |
| 1535 | return PTR_ERR(st); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1536 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1537 | if (!(st->mode & P9_DMSYMLINK)) { |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1538 | retval = -EINVAL; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1539 | goto done; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1540 | } |
| 1541 | |
| 1542 | /* copy extension buffer into buffer */ |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1543 | strncpy(buffer, st->extension, buflen); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1544 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1545 | P9_DPRINTK(P9_DEBUG_VFS, |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1546 | "%s -> %s (%s)\n", dentry->d_name.name, st->extension, buffer); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1547 | |
Martin Stava | 2511cd0 | 2009-11-02 08:39:34 -0600 | [diff] [blame] | 1548 | retval = strnlen(buffer, buflen); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1549 | done: |
Latchesar Ionkov | 62b2be5 | 2010-08-24 18:13:59 +0000 | [diff] [blame] | 1550 | p9stat_free(st); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1551 | kfree(st); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1552 | return retval; |
| 1553 | } |
| 1554 | |
| 1555 | /** |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1556 | * v9fs_vfs_follow_link - follow a symlink path |
| 1557 | * @dentry: dentry for symlink |
| 1558 | * @nd: nameidata |
| 1559 | * |
| 1560 | */ |
| 1561 | |
| 1562 | static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd) |
| 1563 | { |
| 1564 | int len = 0; |
| 1565 | char *link = __getname(); |
| 1566 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1567 | P9_DPRINTK(P9_DEBUG_VFS, "%s n", dentry->d_name.name); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1568 | |
| 1569 | if (!link) |
| 1570 | link = ERR_PTR(-ENOMEM); |
| 1571 | else { |
Latchesar Ionkov | 16cce6d | 2006-03-25 03:07:26 -0800 | [diff] [blame] | 1572 | len = v9fs_readlink(dentry, link, PATH_MAX); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1573 | |
| 1574 | if (len < 0) { |
Davi Arnaut | ce44eeb | 2005-11-07 00:59:36 -0800 | [diff] [blame] | 1575 | __putname(link); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1576 | link = ERR_PTR(len); |
| 1577 | } else |
Martin Stava | 2511cd0 | 2009-11-02 08:39:34 -0600 | [diff] [blame] | 1578 | link[min(len, PATH_MAX-1)] = 0; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1579 | } |
| 1580 | nd_set_link(nd, link); |
| 1581 | |
| 1582 | return NULL; |
| 1583 | } |
| 1584 | |
| 1585 | /** |
| 1586 | * v9fs_vfs_put_link - release a symlink path |
| 1587 | * @dentry: dentry for symlink |
| 1588 | * @nd: nameidata |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 1589 | * @p: unused |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1590 | * |
| 1591 | */ |
| 1592 | |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 1593 | static void |
| 1594 | 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] | 1595 | { |
| 1596 | char *s = nd_get_link(nd); |
| 1597 | |
Duane Griffin | 6ff2320 | 2008-12-19 16:45:21 -0600 | [diff] [blame] | 1598 | P9_DPRINTK(P9_DEBUG_VFS, " %s %s\n", dentry->d_name.name, |
| 1599 | IS_ERR(s) ? "<error>" : s); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1600 | if (!IS_ERR(s)) |
Davi Arnaut | ce44eeb | 2005-11-07 00:59:36 -0800 | [diff] [blame] | 1601 | __putname(s); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1602 | } |
| 1603 | |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 1604 | /** |
| 1605 | * v9fs_vfs_mkspecial - create a special file |
| 1606 | * @dir: inode to create special file in |
| 1607 | * @dentry: dentry to create |
| 1608 | * @mode: mode to create special file |
| 1609 | * @extension: 9p2000.u format extension string representing special file |
| 1610 | * |
| 1611 | */ |
| 1612 | |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1613 | static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, |
| 1614 | int mode, const char *extension) |
| 1615 | { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1616 | u32 perm; |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1617 | struct v9fs_session_info *v9ses; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1618 | struct p9_fid *fid; |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1619 | |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 1620 | v9ses = v9fs_inode2v9ses(dir); |
Sripathi Kodi | dd6102f | 2010-03-05 18:48:00 +0000 | [diff] [blame] | 1621 | if (!v9fs_proto_dotu(v9ses)) { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1622 | P9_DPRINTK(P9_DEBUG_ERROR, "not extended\n"); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 1623 | return -EPERM; |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1624 | } |
| 1625 | |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 1626 | perm = unixmode2p9mode(v9ses, mode); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1627 | fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm, |
| 1628 | P9_OREAD); |
| 1629 | if (IS_ERR(fid)) |
| 1630 | return PTR_ERR(fid); |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 1631 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1632 | p9_client_clunk(fid); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 1633 | return 0; |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1634 | } |
| 1635 | |
| 1636 | /** |
Venkateswararao Jujjuri (JV) | 50cc42f | 2010-06-09 15:59:31 -0700 | [diff] [blame] | 1637 | * v9fs_vfs_symlink_dotl - helper function to create symlinks |
| 1638 | * @dir: directory inode containing symlink |
| 1639 | * @dentry: dentry for symlink |
| 1640 | * @symname: symlink data |
| 1641 | * |
| 1642 | * See Also: 9P2000.L RFC for more information |
| 1643 | * |
| 1644 | */ |
| 1645 | |
| 1646 | static int |
| 1647 | v9fs_vfs_symlink_dotl(struct inode *dir, struct dentry *dentry, |
| 1648 | const char *symname) |
| 1649 | { |
| 1650 | struct v9fs_session_info *v9ses; |
| 1651 | struct p9_fid *dfid; |
| 1652 | struct p9_fid *fid = NULL; |
| 1653 | struct inode *inode; |
| 1654 | struct p9_qid qid; |
| 1655 | char *name; |
| 1656 | int err; |
| 1657 | gid_t gid; |
| 1658 | |
| 1659 | name = (char *) dentry->d_name.name; |
| 1660 | P9_DPRINTK(P9_DEBUG_VFS, "v9fs_vfs_symlink_dotl : %lu,%s,%s\n", |
| 1661 | dir->i_ino, name, symname); |
| 1662 | v9ses = v9fs_inode2v9ses(dir); |
| 1663 | |
| 1664 | dfid = v9fs_fid_lookup(dentry->d_parent); |
| 1665 | if (IS_ERR(dfid)) { |
| 1666 | err = PTR_ERR(dfid); |
| 1667 | P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); |
| 1668 | return err; |
| 1669 | } |
| 1670 | |
| 1671 | gid = v9fs_get_fsgid_for_create(dir); |
| 1672 | |
Venkateswararao Jujjuri (JV) | 50cc42f | 2010-06-09 15:59:31 -0700 | [diff] [blame] | 1673 | /* Server doesn't alter fid on TSYMLINK. Hence no need to clone it. */ |
| 1674 | err = p9_client_symlink(dfid, name, (char *)symname, gid, &qid); |
| 1675 | |
| 1676 | if (err < 0) { |
| 1677 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_symlink failed %d\n", err); |
| 1678 | goto error; |
| 1679 | } |
| 1680 | |
| 1681 | if (v9ses->cache) { |
| 1682 | /* Now walk from the parent so we can get an unopened fid. */ |
| 1683 | fid = p9_client_walk(dfid, 1, &name, 1); |
| 1684 | if (IS_ERR(fid)) { |
| 1685 | err = PTR_ERR(fid); |
| 1686 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", |
| 1687 | err); |
| 1688 | fid = NULL; |
| 1689 | goto error; |
| 1690 | } |
| 1691 | |
| 1692 | /* instantiate inode and assign the unopened fid to dentry */ |
| 1693 | inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); |
| 1694 | if (IS_ERR(inode)) { |
| 1695 | err = PTR_ERR(inode); |
| 1696 | P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", |
| 1697 | err); |
| 1698 | goto error; |
| 1699 | } |
| 1700 | dentry->d_op = &v9fs_cached_dentry_operations; |
| 1701 | d_instantiate(dentry, inode); |
| 1702 | err = v9fs_fid_add(dentry, fid); |
| 1703 | if (err < 0) |
| 1704 | goto error; |
| 1705 | fid = NULL; |
| 1706 | } else { |
| 1707 | /* Not in cached mode. No need to populate inode with stat */ |
| 1708 | inode = v9fs_get_inode(dir->i_sb, S_IFLNK); |
| 1709 | if (IS_ERR(inode)) { |
| 1710 | err = PTR_ERR(inode); |
| 1711 | goto error; |
| 1712 | } |
| 1713 | dentry->d_op = &v9fs_dentry_operations; |
| 1714 | d_instantiate(dentry, inode); |
| 1715 | } |
| 1716 | |
| 1717 | error: |
| 1718 | if (fid) |
| 1719 | p9_client_clunk(fid); |
| 1720 | |
| 1721 | return err; |
| 1722 | } |
| 1723 | |
| 1724 | /** |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1725 | * v9fs_vfs_symlink - helper function to create symlinks |
| 1726 | * @dir: directory inode containing symlink |
| 1727 | * @dentry: dentry for symlink |
| 1728 | * @symname: symlink data |
| 1729 | * |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 1730 | * See Also: 9P2000.u RFC for more information |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1731 | * |
| 1732 | */ |
| 1733 | |
| 1734 | static int |
| 1735 | v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname) |
| 1736 | { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1737 | P9_DPRINTK(P9_DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino, |
| 1738 | dentry->d_name.name, symname); |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1739 | |
| 1740 | return v9fs_vfs_mkspecial(dir, dentry, S_IFLNK, symname); |
| 1741 | } |
| 1742 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1743 | /** |
| 1744 | * v9fs_vfs_link - create a hardlink |
| 1745 | * @old_dentry: dentry for file to link to |
| 1746 | * @dir: inode destination for new link |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 1747 | * @dentry: dentry for link |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1748 | * |
| 1749 | */ |
| 1750 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1751 | static int |
| 1752 | v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, |
| 1753 | struct dentry *dentry) |
| 1754 | { |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1755 | int retval; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1756 | struct p9_fid *oldfid; |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1757 | char *name; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1758 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1759 | P9_DPRINTK(P9_DEBUG_VFS, |
| 1760 | " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name, |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1761 | old_dentry->d_name.name); |
| 1762 | |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 1763 | oldfid = v9fs_fid_clone(old_dentry); |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 1764 | if (IS_ERR(oldfid)) |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 1765 | return PTR_ERR(oldfid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1766 | |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1767 | name = __getname(); |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 1768 | if (unlikely(!name)) { |
| 1769 | retval = -ENOMEM; |
| 1770 | goto clunk_fid; |
| 1771 | } |
Florin Malita | 0710d36 | 2006-06-25 05:48:31 -0700 | [diff] [blame] | 1772 | |
Latchesar Ionkov | 16cce6d | 2006-03-25 03:07:26 -0800 | [diff] [blame] | 1773 | sprintf(name, "%d\n", oldfid->fid); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1774 | retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name); |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1775 | __putname(name); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1776 | |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 1777 | clunk_fid: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1778 | p9_client_clunk(oldfid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1779 | return retval; |
| 1780 | } |
| 1781 | |
| 1782 | /** |
Eric Van Hensbergen | 09d34ee | 2010-08-02 14:28:09 -0500 | [diff] [blame] | 1783 | * v9fs_vfs_link_dotl - create a hardlink for dotl |
| 1784 | * @old_dentry: dentry for file to link to |
| 1785 | * @dir: inode destination for new link |
| 1786 | * @dentry: dentry for link |
| 1787 | * |
| 1788 | */ |
| 1789 | |
| 1790 | static int |
| 1791 | v9fs_vfs_link_dotl(struct dentry *old_dentry, struct inode *dir, |
| 1792 | struct dentry *dentry) |
| 1793 | { |
| 1794 | int err; |
| 1795 | struct p9_fid *dfid, *oldfid; |
| 1796 | char *name; |
| 1797 | struct v9fs_session_info *v9ses; |
| 1798 | struct dentry *dir_dentry; |
| 1799 | |
| 1800 | P9_DPRINTK(P9_DEBUG_VFS, "dir ino: %lu, old_name: %s, new_name: %s\n", |
| 1801 | dir->i_ino, old_dentry->d_name.name, |
| 1802 | dentry->d_name.name); |
| 1803 | |
| 1804 | v9ses = v9fs_inode2v9ses(dir); |
| 1805 | dir_dentry = v9fs_dentry_from_dir_inode(dir); |
| 1806 | dfid = v9fs_fid_lookup(dir_dentry); |
| 1807 | if (IS_ERR(dfid)) |
| 1808 | return PTR_ERR(dfid); |
| 1809 | |
| 1810 | oldfid = v9fs_fid_lookup(old_dentry); |
| 1811 | if (IS_ERR(oldfid)) |
| 1812 | return PTR_ERR(oldfid); |
| 1813 | |
| 1814 | name = (char *) dentry->d_name.name; |
| 1815 | |
| 1816 | err = p9_client_link(dfid, oldfid, (char *)dentry->d_name.name); |
| 1817 | |
| 1818 | if (err < 0) { |
| 1819 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_link failed %d\n", err); |
| 1820 | return err; |
| 1821 | } |
| 1822 | |
| 1823 | if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { |
| 1824 | /* Get the latest stat info from server. */ |
| 1825 | struct p9_fid *fid; |
| 1826 | struct p9_stat_dotl *st; |
| 1827 | |
| 1828 | fid = v9fs_fid_lookup(old_dentry); |
| 1829 | if (IS_ERR(fid)) |
| 1830 | return PTR_ERR(fid); |
| 1831 | |
| 1832 | st = p9_client_getattr_dotl(fid, P9_STATS_BASIC); |
| 1833 | if (IS_ERR(st)) |
| 1834 | return PTR_ERR(st); |
| 1835 | |
| 1836 | v9fs_stat2inode_dotl(st, old_dentry->d_inode); |
| 1837 | |
| 1838 | kfree(st); |
| 1839 | } else { |
| 1840 | /* Caching disabled. No need to get upto date stat info. |
Al Viro | 7de9c6ee | 2010-10-23 11:11:40 -0400 | [diff] [blame] | 1841 | * This dentry will be released immediately. So, just hold the |
| 1842 | * inode |
Eric Van Hensbergen | 09d34ee | 2010-08-02 14:28:09 -0500 | [diff] [blame] | 1843 | */ |
Al Viro | 7de9c6ee | 2010-10-23 11:11:40 -0400 | [diff] [blame] | 1844 | ihold(old_dentry->d_inode); |
Eric Van Hensbergen | 09d34ee | 2010-08-02 14:28:09 -0500 | [diff] [blame] | 1845 | } |
| 1846 | |
| 1847 | dentry->d_op = old_dentry->d_op; |
| 1848 | d_instantiate(dentry, old_dentry->d_inode); |
| 1849 | |
| 1850 | return err; |
| 1851 | } |
| 1852 | |
| 1853 | /** |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1854 | * v9fs_vfs_mknod - create a special file |
| 1855 | * @dir: inode destination for new link |
| 1856 | * @dentry: dentry for file |
| 1857 | * @mode: mode for creation |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 1858 | * @rdev: device associated with special file |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1859 | * |
| 1860 | */ |
| 1861 | |
| 1862 | static int |
| 1863 | v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev) |
| 1864 | { |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1865 | int retval; |
| 1866 | char *name; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1867 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1868 | P9_DPRINTK(P9_DEBUG_VFS, |
| 1869 | " %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] | 1870 | dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev)); |
| 1871 | |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1872 | if (!new_valid_dev(rdev)) |
| 1873 | return -EINVAL; |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 1874 | |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1875 | name = __getname(); |
Eugene Teo | c0291a0 | 2006-03-25 03:07:27 -0800 | [diff] [blame] | 1876 | if (!name) |
| 1877 | return -ENOMEM; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1878 | /* build extension */ |
| 1879 | if (S_ISBLK(mode)) |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1880 | sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev)); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1881 | else if (S_ISCHR(mode)) |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1882 | sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev)); |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 1883 | else if (S_ISFIFO(mode)) |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1884 | *name = 0; |
Venkateswararao Jujjuri | 75cc5c9 | 2010-05-22 12:20:30 -0500 | [diff] [blame] | 1885 | else if (S_ISSOCK(mode)) |
| 1886 | *name = 0; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1887 | else { |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1888 | __putname(name); |
| 1889 | return -EINVAL; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1890 | } |
| 1891 | |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1892 | retval = v9fs_vfs_mkspecial(dir, dentry, mode, name); |
| 1893 | __putname(name); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1894 | |
| 1895 | return retval; |
| 1896 | } |
| 1897 | |
M. Mohan Kumar | 4b43516 | 2010-06-16 14:27:01 +0530 | [diff] [blame] | 1898 | /** |
| 1899 | * v9fs_vfs_mknod_dotl - create a special file |
| 1900 | * @dir: inode destination for new link |
| 1901 | * @dentry: dentry for file |
| 1902 | * @mode: mode for creation |
| 1903 | * @rdev: device associated with special file |
| 1904 | * |
| 1905 | */ |
| 1906 | static int |
Aneesh Kumar K.V | ad77dbc | 2010-09-28 00:27:40 +0530 | [diff] [blame^] | 1907 | v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, int omode, |
M. Mohan Kumar | 4b43516 | 2010-06-16 14:27:01 +0530 | [diff] [blame] | 1908 | dev_t rdev) |
| 1909 | { |
| 1910 | int err; |
| 1911 | char *name; |
Aneesh Kumar K.V | ad77dbc | 2010-09-28 00:27:40 +0530 | [diff] [blame^] | 1912 | mode_t mode; |
M. Mohan Kumar | 4b43516 | 2010-06-16 14:27:01 +0530 | [diff] [blame] | 1913 | struct v9fs_session_info *v9ses; |
| 1914 | struct p9_fid *fid = NULL, *dfid = NULL; |
| 1915 | struct inode *inode; |
| 1916 | gid_t gid; |
| 1917 | struct p9_qid qid; |
M. Mohan Kumar | 01a622b | 2010-06-16 14:27:22 +0530 | [diff] [blame] | 1918 | struct dentry *dir_dentry; |
Aneesh Kumar K.V | ad77dbc | 2010-09-28 00:27:40 +0530 | [diff] [blame^] | 1919 | struct posix_acl *dacl = NULL, *pacl = NULL; |
M. Mohan Kumar | 4b43516 | 2010-06-16 14:27:01 +0530 | [diff] [blame] | 1920 | |
| 1921 | P9_DPRINTK(P9_DEBUG_VFS, |
| 1922 | " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino, |
Aneesh Kumar K.V | ad77dbc | 2010-09-28 00:27:40 +0530 | [diff] [blame^] | 1923 | dentry->d_name.name, omode, MAJOR(rdev), MINOR(rdev)); |
M. Mohan Kumar | 4b43516 | 2010-06-16 14:27:01 +0530 | [diff] [blame] | 1924 | |
| 1925 | if (!new_valid_dev(rdev)) |
| 1926 | return -EINVAL; |
| 1927 | |
| 1928 | v9ses = v9fs_inode2v9ses(dir); |
| 1929 | dir_dentry = v9fs_dentry_from_dir_inode(dir); |
M. Mohan Kumar | 01a622b | 2010-06-16 14:27:22 +0530 | [diff] [blame] | 1930 | dfid = v9fs_fid_lookup(dir_dentry); |
M. Mohan Kumar | 4b43516 | 2010-06-16 14:27:01 +0530 | [diff] [blame] | 1931 | if (IS_ERR(dfid)) { |
| 1932 | err = PTR_ERR(dfid); |
| 1933 | P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); |
| 1934 | dfid = NULL; |
| 1935 | goto error; |
| 1936 | } |
| 1937 | |
| 1938 | gid = v9fs_get_fsgid_for_create(dir); |
Aneesh Kumar K.V | ad77dbc | 2010-09-28 00:27:40 +0530 | [diff] [blame^] | 1939 | mode = omode; |
| 1940 | /* Update mode based on ACL value */ |
| 1941 | err = v9fs_acl_mode(dir, &mode, &dacl, &pacl); |
| 1942 | if (err) { |
| 1943 | P9_DPRINTK(P9_DEBUG_VFS, |
| 1944 | "Failed to get acl values in mknod %d\n", err); |
| 1945 | goto error; |
| 1946 | } |
M. Mohan Kumar | 4b43516 | 2010-06-16 14:27:01 +0530 | [diff] [blame] | 1947 | name = (char *) dentry->d_name.name; |
| 1948 | |
| 1949 | err = p9_client_mknod_dotl(dfid, name, mode, rdev, gid, &qid); |
| 1950 | if (err < 0) |
| 1951 | goto error; |
| 1952 | |
| 1953 | /* instantiate inode and assign the unopened fid to the dentry */ |
| 1954 | if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { |
| 1955 | fid = p9_client_walk(dfid, 1, &name, 1); |
| 1956 | if (IS_ERR(fid)) { |
| 1957 | err = PTR_ERR(fid); |
| 1958 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", |
| 1959 | err); |
| 1960 | fid = NULL; |
| 1961 | goto error; |
| 1962 | } |
| 1963 | |
| 1964 | inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); |
| 1965 | if (IS_ERR(inode)) { |
| 1966 | err = PTR_ERR(inode); |
| 1967 | P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", |
| 1968 | err); |
| 1969 | goto error; |
| 1970 | } |
| 1971 | dentry->d_op = &v9fs_cached_dentry_operations; |
| 1972 | d_instantiate(dentry, inode); |
| 1973 | err = v9fs_fid_add(dentry, fid); |
| 1974 | if (err < 0) |
| 1975 | goto error; |
| 1976 | fid = NULL; |
| 1977 | } else { |
| 1978 | /* |
| 1979 | * Not in cached mode. No need to populate inode with stat. |
| 1980 | * socket syscall returns a fd, so we need instantiate |
| 1981 | */ |
| 1982 | inode = v9fs_get_inode(dir->i_sb, mode); |
| 1983 | if (IS_ERR(inode)) { |
| 1984 | err = PTR_ERR(inode); |
| 1985 | goto error; |
| 1986 | } |
| 1987 | dentry->d_op = &v9fs_dentry_operations; |
| 1988 | d_instantiate(dentry, inode); |
| 1989 | } |
Aneesh Kumar K.V | ad77dbc | 2010-09-28 00:27:40 +0530 | [diff] [blame^] | 1990 | /* Now set the ACL based on the default value */ |
| 1991 | v9fs_set_create_acl(dentry, dacl, pacl); |
M. Mohan Kumar | 4b43516 | 2010-06-16 14:27:01 +0530 | [diff] [blame] | 1992 | error: |
| 1993 | if (fid) |
| 1994 | p9_client_clunk(fid); |
| 1995 | return err; |
| 1996 | } |
| 1997 | |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 1998 | static const struct inode_operations v9fs_dir_inode_operations_dotu = { |
| 1999 | .create = v9fs_vfs_create, |
| 2000 | .lookup = v9fs_vfs_lookup, |
| 2001 | .symlink = v9fs_vfs_symlink, |
Venkateswararao Jujjuri (JV) | 50cc42f | 2010-06-09 15:59:31 -0700 | [diff] [blame] | 2002 | .link = v9fs_vfs_link, |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 2003 | .unlink = v9fs_vfs_unlink, |
| 2004 | .mkdir = v9fs_vfs_mkdir, |
| 2005 | .rmdir = v9fs_vfs_rmdir, |
Aneesh Kumar K.V | 1d76e31 | 2010-08-30 17:43:07 +0000 | [diff] [blame] | 2006 | .mknod = v9fs_vfs_mknod, |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 2007 | .rename = v9fs_vfs_rename, |
| 2008 | .getattr = v9fs_vfs_getattr, |
| 2009 | .setattr = v9fs_vfs_setattr, |
| 2010 | }; |
| 2011 | |
| 2012 | static const struct inode_operations v9fs_dir_inode_operations_dotl = { |
Venkateswararao Jujjuri (JV) | 5643135 | 2010-06-17 18:27:46 -0700 | [diff] [blame] | 2013 | .create = v9fs_vfs_create_dotl, |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 2014 | .lookup = v9fs_vfs_lookup, |
Venkateswararao Jujjuri (JV) | 50cc42f | 2010-06-09 15:59:31 -0700 | [diff] [blame] | 2015 | .link = v9fs_vfs_link_dotl, |
| 2016 | .symlink = v9fs_vfs_symlink_dotl, |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 2017 | .unlink = v9fs_vfs_unlink, |
M. Mohan Kumar | 01a622b | 2010-06-16 14:27:22 +0530 | [diff] [blame] | 2018 | .mkdir = v9fs_vfs_mkdir_dotl, |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 2019 | .rmdir = v9fs_vfs_rmdir, |
M. Mohan Kumar | 4b43516 | 2010-06-16 14:27:01 +0530 | [diff] [blame] | 2020 | .mknod = v9fs_vfs_mknod_dotl, |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 2021 | .rename = v9fs_vfs_rename, |
Sripathi Kodi | f085312 | 2010-07-12 20:07:23 +0530 | [diff] [blame] | 2022 | .getattr = v9fs_vfs_getattr_dotl, |
Sripathi Kodi | 87d7845 | 2010-06-18 11:50:10 +0530 | [diff] [blame] | 2023 | .setattr = v9fs_vfs_setattr_dotl, |
Aneesh Kumar K.V | ebf4626 | 2010-05-31 13:22:56 +0530 | [diff] [blame] | 2024 | .setxattr = generic_setxattr, |
| 2025 | .getxattr = generic_getxattr, |
| 2026 | .removexattr = generic_removexattr, |
| 2027 | .listxattr = v9fs_listxattr, |
Aneesh Kumar K.V | 85ff872 | 2010-09-28 00:27:39 +0530 | [diff] [blame] | 2028 | .check_acl = v9fs_check_acl, |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 2029 | }; |
| 2030 | |
Arjan van de Ven | 754661f | 2007-02-12 00:55:38 -0800 | [diff] [blame] | 2031 | static const struct inode_operations v9fs_dir_inode_operations = { |
Eric Van Hensbergen | b501611 | 2005-09-09 13:04:27 -0700 | [diff] [blame] | 2032 | .create = v9fs_vfs_create, |
| 2033 | .lookup = v9fs_vfs_lookup, |
| 2034 | .unlink = v9fs_vfs_unlink, |
| 2035 | .mkdir = v9fs_vfs_mkdir, |
| 2036 | .rmdir = v9fs_vfs_rmdir, |
| 2037 | .mknod = v9fs_vfs_mknod, |
| 2038 | .rename = v9fs_vfs_rename, |
| 2039 | .getattr = v9fs_vfs_getattr, |
| 2040 | .setattr = v9fs_vfs_setattr, |
| 2041 | }; |
| 2042 | |
Arjan van de Ven | 754661f | 2007-02-12 00:55:38 -0800 | [diff] [blame] | 2043 | static const struct inode_operations v9fs_file_inode_operations = { |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 2044 | .getattr = v9fs_vfs_getattr, |
| 2045 | .setattr = v9fs_vfs_setattr, |
| 2046 | }; |
| 2047 | |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 2048 | static const struct inode_operations v9fs_file_inode_operations_dotl = { |
Sripathi Kodi | f085312 | 2010-07-12 20:07:23 +0530 | [diff] [blame] | 2049 | .getattr = v9fs_vfs_getattr_dotl, |
Sripathi Kodi | 87d7845 | 2010-06-18 11:50:10 +0530 | [diff] [blame] | 2050 | .setattr = v9fs_vfs_setattr_dotl, |
Aneesh Kumar K.V | ebf4626 | 2010-05-31 13:22:56 +0530 | [diff] [blame] | 2051 | .setxattr = generic_setxattr, |
| 2052 | .getxattr = generic_getxattr, |
| 2053 | .removexattr = generic_removexattr, |
| 2054 | .listxattr = v9fs_listxattr, |
Aneesh Kumar K.V | 85ff872 | 2010-09-28 00:27:39 +0530 | [diff] [blame] | 2055 | .check_acl = v9fs_check_acl, |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 2056 | }; |
| 2057 | |
Arjan van de Ven | 754661f | 2007-02-12 00:55:38 -0800 | [diff] [blame] | 2058 | static const struct inode_operations v9fs_symlink_inode_operations = { |
Al Viro | 204f2f0 | 2009-12-23 00:35:54 -0500 | [diff] [blame] | 2059 | .readlink = generic_readlink, |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 2060 | .follow_link = v9fs_vfs_follow_link, |
| 2061 | .put_link = v9fs_vfs_put_link, |
| 2062 | .getattr = v9fs_vfs_getattr, |
| 2063 | .setattr = v9fs_vfs_setattr, |
| 2064 | }; |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 2065 | |
| 2066 | static const struct inode_operations v9fs_symlink_inode_operations_dotl = { |
| 2067 | .readlink = generic_readlink, |
| 2068 | .follow_link = v9fs_vfs_follow_link, |
| 2069 | .put_link = v9fs_vfs_put_link, |
Sripathi Kodi | f085312 | 2010-07-12 20:07:23 +0530 | [diff] [blame] | 2070 | .getattr = v9fs_vfs_getattr_dotl, |
Sripathi Kodi | 87d7845 | 2010-06-18 11:50:10 +0530 | [diff] [blame] | 2071 | .setattr = v9fs_vfs_setattr_dotl, |
Aneesh Kumar K.V | ebf4626 | 2010-05-31 13:22:56 +0530 | [diff] [blame] | 2072 | .setxattr = generic_setxattr, |
| 2073 | .getxattr = generic_getxattr, |
| 2074 | .removexattr = generic_removexattr, |
| 2075 | .listxattr = v9fs_listxattr, |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 2076 | }; |