Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/fs/9p/vfs_inode.c |
| 3 | * |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 4 | * This file contains vfs inode ops for the 9P2000 protocol. |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 5 | * |
| 6 | * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com> |
| 7 | * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov> |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
Eric Van Hensbergen | 42e8c50 | 2006-03-25 03:07:28 -0800 | [diff] [blame] | 10 | * it under the terms of the GNU General Public License version 2 |
| 11 | * as published by the Free Software Foundation. |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with this program; if not, write to: |
| 20 | * Free Software Foundation |
| 21 | * 51 Franklin Street, Fifth Floor |
| 22 | * Boston, MA 02111-1301 USA |
| 23 | * |
| 24 | */ |
| 25 | |
| 26 | #include <linux/module.h> |
| 27 | #include <linux/errno.h> |
| 28 | #include <linux/fs.h> |
| 29 | #include <linux/file.h> |
| 30 | #include <linux/pagemap.h> |
| 31 | #include <linux/stat.h> |
| 32 | #include <linux/string.h> |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 33 | #include <linux/inet.h> |
| 34 | #include <linux/namei.h> |
| 35 | #include <linux/idr.h> |
Alexey Dobriyan | e8edc6e | 2007-05-21 01:22:52 +0400 | [diff] [blame] | 36 | #include <linux/sched.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 37 | #include <linux/slab.h> |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 38 | #include <net/9p/9p.h> |
| 39 | #include <net/9p/client.h> |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 40 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 41 | #include "v9fs.h" |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 42 | #include "v9fs_vfs.h" |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 43 | #include "fid.h" |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 44 | #include "cache.h" |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 45 | |
Arjan van de Ven | 754661f | 2007-02-12 00:55:38 -0800 | [diff] [blame] | 46 | static const struct inode_operations v9fs_dir_inode_operations; |
| 47 | static const struct inode_operations v9fs_dir_inode_operations_ext; |
| 48 | static const struct inode_operations v9fs_file_inode_operations; |
| 49 | static const struct inode_operations v9fs_symlink_inode_operations; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 50 | |
| 51 | /** |
| 52 | * unixmode2p9mode - convert unix mode bits to plan 9 |
| 53 | * @v9ses: v9fs session information |
| 54 | * @mode: mode to convert |
| 55 | * |
| 56 | */ |
| 57 | |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 58 | static int unixmode2p9mode(struct v9fs_session_info *v9ses, int mode) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 59 | { |
| 60 | int res; |
| 61 | res = mode & 0777; |
| 62 | if (S_ISDIR(mode)) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 63 | res |= P9_DMDIR; |
Sripathi Kodi | dd6102f | 2010-03-05 18:48:00 +0000 | [diff] [blame] | 64 | if (v9fs_proto_dotu(v9ses)) { |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 65 | if (S_ISLNK(mode)) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 66 | res |= P9_DMSYMLINK; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 67 | if (v9ses->nodev == 0) { |
| 68 | if (S_ISSOCK(mode)) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 69 | res |= P9_DMSOCKET; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 70 | if (S_ISFIFO(mode)) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 71 | res |= P9_DMNAMEDPIPE; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 72 | if (S_ISBLK(mode)) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 73 | res |= P9_DMDEVICE; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 74 | if (S_ISCHR(mode)) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 75 | res |= P9_DMDEVICE; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 76 | } |
| 77 | |
| 78 | if ((mode & S_ISUID) == S_ISUID) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 79 | res |= P9_DMSETUID; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 80 | if ((mode & S_ISGID) == S_ISGID) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 81 | res |= P9_DMSETGID; |
Anthony Liguori | d199d65 | 2008-02-06 19:25:06 -0600 | [diff] [blame] | 82 | if ((mode & S_ISVTX) == S_ISVTX) |
| 83 | res |= P9_DMSETVTX; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 84 | if ((mode & P9_DMLINK)) |
| 85 | res |= P9_DMLINK; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 86 | } |
| 87 | |
| 88 | return res; |
| 89 | } |
| 90 | |
| 91 | /** |
| 92 | * p9mode2unixmode- convert plan9 mode bits to unix mode bits |
| 93 | * @v9ses: v9fs session information |
| 94 | * @mode: mode to convert |
| 95 | * |
| 96 | */ |
| 97 | |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 98 | static int p9mode2unixmode(struct v9fs_session_info *v9ses, int mode) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 99 | { |
| 100 | int res; |
| 101 | |
| 102 | res = mode & 0777; |
| 103 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 104 | if ((mode & P9_DMDIR) == P9_DMDIR) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 105 | res |= S_IFDIR; |
Sripathi Kodi | dd6102f | 2010-03-05 18:48:00 +0000 | [diff] [blame] | 106 | else if ((mode & P9_DMSYMLINK) && (v9fs_proto_dotu(v9ses))) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 107 | res |= S_IFLNK; |
Sripathi Kodi | dd6102f | 2010-03-05 18:48:00 +0000 | [diff] [blame] | 108 | else if ((mode & P9_DMSOCKET) && (v9fs_proto_dotu(v9ses)) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 109 | && (v9ses->nodev == 0)) |
| 110 | res |= S_IFSOCK; |
Sripathi Kodi | dd6102f | 2010-03-05 18:48:00 +0000 | [diff] [blame] | 111 | else if ((mode & P9_DMNAMEDPIPE) && (v9fs_proto_dotu(v9ses)) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 112 | && (v9ses->nodev == 0)) |
| 113 | res |= S_IFIFO; |
Sripathi Kodi | dd6102f | 2010-03-05 18:48:00 +0000 | [diff] [blame] | 114 | else if ((mode & P9_DMDEVICE) && (v9fs_proto_dotu(v9ses)) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 115 | && (v9ses->nodev == 0)) |
| 116 | res |= S_IFBLK; |
| 117 | else |
| 118 | res |= S_IFREG; |
| 119 | |
Sripathi Kodi | dd6102f | 2010-03-05 18:48:00 +0000 | [diff] [blame] | 120 | if (v9fs_proto_dotu(v9ses)) { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 121 | if ((mode & P9_DMSETUID) == P9_DMSETUID) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 122 | res |= S_ISUID; |
| 123 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 124 | if ((mode & P9_DMSETGID) == P9_DMSETGID) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 125 | res |= S_ISGID; |
Anthony Liguori | d199d65 | 2008-02-06 19:25:06 -0600 | [diff] [blame] | 126 | |
| 127 | if ((mode & P9_DMSETVTX) == P9_DMSETVTX) |
| 128 | res |= S_ISVTX; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 129 | } |
| 130 | |
| 131 | return res; |
| 132 | } |
| 133 | |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 134 | /** |
| 135 | * v9fs_uflags2omode- convert posix open flags to plan 9 mode bits |
| 136 | * @uflags: flags to convert |
Eric Van Hensbergen | 2e4bef4 | 2008-06-24 17:39:39 -0500 | [diff] [blame] | 137 | * @extended: if .u extensions are active |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 138 | */ |
| 139 | |
Eric Van Hensbergen | 2e4bef4 | 2008-06-24 17:39:39 -0500 | [diff] [blame] | 140 | int v9fs_uflags2omode(int uflags, int extended) |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 141 | { |
| 142 | int ret; |
| 143 | |
| 144 | ret = 0; |
| 145 | switch (uflags&3) { |
| 146 | default: |
| 147 | case O_RDONLY: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 148 | ret = P9_OREAD; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 149 | break; |
| 150 | |
| 151 | case O_WRONLY: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 152 | ret = P9_OWRITE; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 153 | break; |
| 154 | |
| 155 | case O_RDWR: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 156 | ret = P9_ORDWR; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 157 | break; |
| 158 | } |
| 159 | |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 160 | if (uflags & O_TRUNC) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 161 | ret |= P9_OTRUNC; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 162 | |
Eric Van Hensbergen | 2e4bef4 | 2008-06-24 17:39:39 -0500 | [diff] [blame] | 163 | if (extended) { |
| 164 | if (uflags & O_EXCL) |
| 165 | ret |= P9_OEXCL; |
| 166 | |
| 167 | if (uflags & O_APPEND) |
| 168 | ret |= P9_OAPPEND; |
| 169 | } |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 170 | |
| 171 | return ret; |
| 172 | } |
| 173 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 174 | /** |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 175 | * v9fs_blank_wstat - helper function to setup a 9P stat structure |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 176 | * @wstat: structure to initialize |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 177 | * |
| 178 | */ |
| 179 | |
M. Mohan Kumar | 7a4439c | 2010-02-08 15:36:48 -0600 | [diff] [blame] | 180 | void |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 181 | v9fs_blank_wstat(struct p9_wstat *wstat) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 182 | { |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 183 | wstat->type = ~0; |
| 184 | wstat->dev = ~0; |
| 185 | wstat->qid.type = ~0; |
| 186 | wstat->qid.version = ~0; |
| 187 | *((long long *)&wstat->qid.path) = ~0; |
| 188 | wstat->mode = ~0; |
| 189 | wstat->atime = ~0; |
| 190 | wstat->mtime = ~0; |
| 191 | wstat->length = ~0; |
| 192 | wstat->name = NULL; |
| 193 | wstat->uid = NULL; |
| 194 | wstat->gid = NULL; |
| 195 | wstat->muid = NULL; |
| 196 | wstat->n_uid = ~0; |
| 197 | wstat->n_gid = ~0; |
| 198 | wstat->n_muid = ~0; |
| 199 | wstat->extension = NULL; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 200 | } |
| 201 | |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 202 | #ifdef CONFIG_9P_FSCACHE |
| 203 | /** |
| 204 | * v9fs_alloc_inode - helper function to allocate an inode |
| 205 | * This callback is executed before setting up the inode so that we |
| 206 | * can associate a vcookie with each inode. |
| 207 | * |
| 208 | */ |
| 209 | |
| 210 | struct inode *v9fs_alloc_inode(struct super_block *sb) |
| 211 | { |
| 212 | struct v9fs_cookie *vcookie; |
| 213 | vcookie = (struct v9fs_cookie *)kmem_cache_alloc(vcookie_cache, |
| 214 | GFP_KERNEL); |
| 215 | if (!vcookie) |
| 216 | return NULL; |
| 217 | |
| 218 | vcookie->fscache = NULL; |
| 219 | vcookie->qid = NULL; |
| 220 | spin_lock_init(&vcookie->lock); |
| 221 | return &vcookie->inode; |
| 222 | } |
| 223 | |
| 224 | /** |
| 225 | * v9fs_destroy_inode - destroy an inode |
| 226 | * |
| 227 | */ |
| 228 | |
| 229 | void v9fs_destroy_inode(struct inode *inode) |
| 230 | { |
| 231 | kmem_cache_free(vcookie_cache, v9fs_inode2cookie(inode)); |
| 232 | } |
| 233 | #endif |
| 234 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 235 | /** |
| 236 | * v9fs_get_inode - helper function to setup an inode |
| 237 | * @sb: superblock |
| 238 | * @mode: mode to setup inode with |
| 239 | * |
| 240 | */ |
| 241 | |
| 242 | struct inode *v9fs_get_inode(struct super_block *sb, int mode) |
| 243 | { |
Abhishek Kulkarni | 2bb5411 | 2009-07-19 13:41:56 -0600 | [diff] [blame] | 244 | int err; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 245 | struct inode *inode; |
Eric Van Hensbergen | b501611 | 2005-09-09 13:04:27 -0700 | [diff] [blame] | 246 | struct v9fs_session_info *v9ses = sb->s_fs_info; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 247 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 248 | 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] | 249 | |
| 250 | inode = new_inode(sb); |
Abhishek Kulkarni | 2bb5411 | 2009-07-19 13:41:56 -0600 | [diff] [blame] | 251 | if (!inode) { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 252 | P9_EPRINTK(KERN_WARNING, "Problem allocating inode\n"); |
Abhishek Kulkarni | 48559b4c | 2009-08-17 16:32:18 -0500 | [diff] [blame] | 253 | return ERR_PTR(-ENOMEM); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 254 | } |
Abhishek Kulkarni | 2bb5411 | 2009-07-19 13:41:56 -0600 | [diff] [blame] | 255 | |
Dmitry Monakhov | 217f206 | 2010-03-04 17:30:57 +0300 | [diff] [blame^] | 256 | inode_init_owner(inode, NULL, mode); |
Abhishek Kulkarni | 2bb5411 | 2009-07-19 13:41:56 -0600 | [diff] [blame] | 257 | inode->i_blocks = 0; |
| 258 | inode->i_rdev = 0; |
| 259 | inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; |
| 260 | inode->i_mapping->a_ops = &v9fs_addr_operations; |
| 261 | |
| 262 | switch (mode & S_IFMT) { |
| 263 | case S_IFIFO: |
| 264 | case S_IFBLK: |
| 265 | case S_IFCHR: |
| 266 | case S_IFSOCK: |
Sripathi Kodi | dd6102f | 2010-03-05 18:48:00 +0000 | [diff] [blame] | 267 | if (!v9fs_proto_dotu(v9ses)) { |
Abhishek Kulkarni | 2bb5411 | 2009-07-19 13:41:56 -0600 | [diff] [blame] | 268 | P9_DPRINTK(P9_DEBUG_ERROR, |
| 269 | "special files without extended mode\n"); |
| 270 | err = -EINVAL; |
| 271 | goto error; |
| 272 | } |
| 273 | init_special_inode(inode, inode->i_mode, inode->i_rdev); |
| 274 | break; |
| 275 | case S_IFREG: |
| 276 | inode->i_op = &v9fs_file_inode_operations; |
| 277 | inode->i_fop = &v9fs_file_operations; |
| 278 | break; |
| 279 | case S_IFLNK: |
Sripathi Kodi | dd6102f | 2010-03-05 18:48:00 +0000 | [diff] [blame] | 280 | if (!v9fs_proto_dotu(v9ses)) { |
Abhishek Kulkarni | 2bb5411 | 2009-07-19 13:41:56 -0600 | [diff] [blame] | 281 | P9_DPRINTK(P9_DEBUG_ERROR, |
| 282 | "extended modes used w/o 9P2000.u\n"); |
| 283 | err = -EINVAL; |
| 284 | goto error; |
| 285 | } |
| 286 | inode->i_op = &v9fs_symlink_inode_operations; |
| 287 | break; |
| 288 | case S_IFDIR: |
| 289 | inc_nlink(inode); |
Sripathi Kodi | dd6102f | 2010-03-05 18:48:00 +0000 | [diff] [blame] | 290 | if (v9fs_proto_dotu(v9ses)) |
Abhishek Kulkarni | 2bb5411 | 2009-07-19 13:41:56 -0600 | [diff] [blame] | 291 | inode->i_op = &v9fs_dir_inode_operations_ext; |
| 292 | else |
| 293 | inode->i_op = &v9fs_dir_inode_operations; |
| 294 | inode->i_fop = &v9fs_dir_operations; |
| 295 | break; |
| 296 | default: |
| 297 | P9_DPRINTK(P9_DEBUG_ERROR, "BAD mode 0x%x S_IFMT 0x%x\n", |
| 298 | mode, mode & S_IFMT); |
| 299 | err = -EINVAL; |
| 300 | goto error; |
| 301 | } |
| 302 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 303 | return inode; |
Abhishek Kulkarni | 2bb5411 | 2009-07-19 13:41:56 -0600 | [diff] [blame] | 304 | |
| 305 | error: |
| 306 | iput(inode); |
| 307 | return ERR_PTR(err); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 308 | } |
| 309 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 310 | /* |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 311 | static struct v9fs_fid* |
| 312 | v9fs_clone_walk(struct v9fs_session_info *v9ses, u32 fid, struct dentry *dentry) |
| 313 | { |
| 314 | int err; |
Mika Kukkonen | 736c4b8 | 2006-12-06 20:36:29 -0800 | [diff] [blame] | 315 | int nfid; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 316 | struct v9fs_fid *ret; |
| 317 | struct v9fs_fcall *fcall; |
| 318 | |
| 319 | nfid = v9fs_get_idpool(&v9ses->fidpool); |
| 320 | if (nfid < 0) { |
| 321 | eprintk(KERN_WARNING, "no free fids available\n"); |
Latchesar Ionkov | 731805b | 2006-03-07 21:55:42 -0800 | [diff] [blame] | 322 | return ERR_PTR(-ENOSPC); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 323 | } |
| 324 | |
| 325 | err = v9fs_t_walk(v9ses, fid, nfid, (char *) dentry->d_name.name, |
| 326 | &fcall); |
| 327 | |
| 328 | if (err < 0) { |
Latchesar Ionkov | 41e5a6a | 2006-05-15 09:44:21 -0700 | [diff] [blame] | 329 | if (fcall && fcall->id == RWALK) |
| 330 | goto clunk_fid; |
| 331 | |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 332 | PRINT_FCALL_ERROR("walk error", fcall); |
| 333 | v9fs_put_idpool(nfid, &v9ses->fidpool); |
| 334 | goto error; |
| 335 | } |
| 336 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 337 | kfree(fcall); |
Latchesar Ionkov | 3cf6429 | 2006-01-08 01:04:58 -0800 | [diff] [blame] | 338 | fcall = NULL; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 339 | ret = v9fs_fid_create(v9ses, nfid); |
| 340 | if (!ret) { |
| 341 | err = -ENOMEM; |
| 342 | goto clunk_fid; |
| 343 | } |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 344 | |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 345 | err = v9fs_fid_insert(ret, dentry); |
| 346 | if (err < 0) { |
| 347 | v9fs_fid_destroy(ret); |
| 348 | goto clunk_fid; |
Latchesar Ionkov | 0b8dd17 | 2005-09-27 21:45:24 -0700 | [diff] [blame] | 349 | } |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 350 | |
| 351 | return ret; |
| 352 | |
| 353 | clunk_fid: |
| 354 | v9fs_t_clunk(v9ses, nfid); |
| 355 | |
| 356 | error: |
| 357 | kfree(fcall); |
| 358 | return ERR_PTR(err); |
| 359 | } |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 360 | */ |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 361 | |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 362 | |
| 363 | /** |
| 364 | * v9fs_clear_inode - release an inode |
| 365 | * @inode: inode to release |
| 366 | * |
| 367 | */ |
| 368 | void v9fs_clear_inode(struct inode *inode) |
| 369 | { |
| 370 | filemap_fdatawrite(inode->i_mapping); |
| 371 | |
| 372 | #ifdef CONFIG_9P_FSCACHE |
| 373 | v9fs_cache_inode_put_cookie(inode); |
| 374 | #endif |
| 375 | } |
| 376 | |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 377 | /** |
| 378 | * v9fs_inode_from_fid - populate an inode by issuing a attribute request |
| 379 | * @v9ses: session information |
| 380 | * @fid: fid to issue attribute request for |
| 381 | * @sb: superblock on which to create inode |
| 382 | * |
| 383 | */ |
| 384 | |
Latchesar Ionkov | 5174fda | 2006-03-25 03:07:25 -0800 | [diff] [blame] | 385 | static struct inode * |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 386 | v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 387 | struct super_block *sb) |
| 388 | { |
| 389 | int err, umode; |
| 390 | struct inode *ret; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 391 | struct p9_wstat *st; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 392 | |
| 393 | ret = NULL; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 394 | st = p9_client_stat(fid); |
Abhishek Kulkarni | 02bc356 | 2009-07-19 13:41:54 -0600 | [diff] [blame] | 395 | if (IS_ERR(st)) |
| 396 | return ERR_CAST(st); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 397 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 398 | umode = p9mode2unixmode(v9ses, st->mode); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 399 | ret = v9fs_get_inode(sb, umode); |
| 400 | if (IS_ERR(ret)) { |
| 401 | err = PTR_ERR(ret); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 402 | goto error; |
| 403 | } |
| 404 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 405 | v9fs_stat2inode(st, ret, sb); |
| 406 | ret->i_ino = v9fs_qid2ino(&st->qid); |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 407 | |
| 408 | #ifdef CONFIG_9P_FSCACHE |
| 409 | v9fs_vcookie_set_qid(ret, &st->qid); |
| 410 | v9fs_cache_inode_get_cookie(ret); |
| 411 | #endif |
Abhishek Kulkarni | 02bc356 | 2009-07-19 13:41:54 -0600 | [diff] [blame] | 412 | p9stat_free(st); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 413 | kfree(st); |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 414 | |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 415 | return ret; |
| 416 | |
| 417 | error: |
Abhishek Kulkarni | 02bc356 | 2009-07-19 13:41:54 -0600 | [diff] [blame] | 418 | p9stat_free(st); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 419 | kfree(st); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 420 | return ERR_PTR(err); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 421 | } |
| 422 | |
| 423 | /** |
| 424 | * v9fs_remove - helper function to remove files and directories |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 425 | * @dir: directory inode that is being deleted |
| 426 | * @file: dentry that is being deleted |
| 427 | * @rmdir: removing a directory |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 428 | * |
| 429 | */ |
| 430 | |
| 431 | static int v9fs_remove(struct inode *dir, struct dentry *file, int rmdir) |
| 432 | { |
Aneesh Kumar K.V | d994f40 | 2010-03-29 18:14:50 -0500 | [diff] [blame] | 433 | int retval; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 434 | struct inode *file_inode; |
| 435 | struct v9fs_session_info *v9ses; |
| 436 | struct p9_fid *v9fid; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 437 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 438 | 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] | 439 | rmdir); |
| 440 | |
| 441 | file_inode = file->d_inode; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 442 | v9ses = v9fs_inode2v9ses(file_inode); |
Latchesar Ionkov | c959df9 | 2007-04-23 14:41:11 -0700 | [diff] [blame] | 443 | v9fid = v9fs_fid_clone(file); |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 444 | if (IS_ERR(v9fid)) |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 445 | return PTR_ERR(v9fid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 446 | |
Aneesh Kumar K.V | d994f40 | 2010-03-29 18:14:50 -0500 | [diff] [blame] | 447 | retval = p9_client_remove(v9fid); |
| 448 | if (!retval) |
| 449 | drop_nlink(file_inode); |
| 450 | return retval; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 451 | } |
| 452 | |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 453 | static int |
| 454 | v9fs_open_created(struct inode *inode, struct file *file) |
| 455 | { |
| 456 | return 0; |
| 457 | } |
| 458 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 459 | |
| 460 | /** |
| 461 | * v9fs_create - Create a file |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 462 | * @v9ses: session information |
| 463 | * @dir: directory that dentry is being created in |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 464 | * @dentry: dentry that is being created |
Abhishek Kulkarni | 0e15597 | 2009-07-19 13:41:55 -0600 | [diff] [blame] | 465 | * @extension: 9p2000.u extension string to support devices, etc. |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 466 | * @perm: create permissions |
| 467 | * @mode: open mode |
| 468 | * |
| 469 | */ |
| 470 | static struct p9_fid * |
| 471 | v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir, |
| 472 | struct dentry *dentry, char *extension, u32 perm, u8 mode) |
| 473 | { |
| 474 | int err; |
| 475 | char *name; |
| 476 | struct p9_fid *dfid, *ofid, *fid; |
| 477 | struct inode *inode; |
| 478 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 479 | P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); |
| 480 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 481 | err = 0; |
| 482 | ofid = NULL; |
| 483 | fid = NULL; |
| 484 | name = (char *) dentry->d_name.name; |
| 485 | dfid = v9fs_fid_clone(dentry->d_parent); |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 486 | if (IS_ERR(dfid)) { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 487 | err = PTR_ERR(dfid); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 488 | P9_DPRINTK(P9_DEBUG_VFS, "fid clone failed %d\n", err); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 489 | dfid = NULL; |
| 490 | goto error; |
| 491 | } |
| 492 | |
| 493 | /* clone a fid to use for creation */ |
| 494 | ofid = p9_client_walk(dfid, 0, NULL, 1); |
| 495 | if (IS_ERR(ofid)) { |
| 496 | err = PTR_ERR(ofid); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 497 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 498 | ofid = NULL; |
| 499 | goto error; |
| 500 | } |
| 501 | |
| 502 | err = p9_client_fcreate(ofid, name, perm, mode, extension); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 503 | if (err < 0) { |
| 504 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 505 | goto error; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 506 | } |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 507 | |
| 508 | /* now walk from the parent so we can get unopened fid */ |
| 509 | fid = p9_client_walk(dfid, 1, &name, 0); |
| 510 | if (IS_ERR(fid)) { |
| 511 | err = PTR_ERR(fid); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 512 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 513 | fid = NULL; |
| 514 | goto error; |
| 515 | } else |
| 516 | dfid = NULL; |
| 517 | |
| 518 | /* instantiate inode and assign the unopened fid to the dentry */ |
| 519 | inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); |
| 520 | if (IS_ERR(inode)) { |
| 521 | err = PTR_ERR(inode); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 522 | P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", err); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 523 | goto error; |
| 524 | } |
| 525 | |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 526 | if (v9ses->cache) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 527 | dentry->d_op = &v9fs_cached_dentry_operations; |
| 528 | else |
| 529 | dentry->d_op = &v9fs_dentry_operations; |
| 530 | |
| 531 | d_instantiate(dentry, inode); |
Abhishek Kulkarni | 50fb6d2 | 2009-07-19 13:41:57 -0600 | [diff] [blame] | 532 | err = v9fs_fid_add(dentry, fid); |
| 533 | if (err < 0) |
| 534 | goto error; |
| 535 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 536 | return ofid; |
| 537 | |
| 538 | error: |
| 539 | if (dfid) |
| 540 | p9_client_clunk(dfid); |
| 541 | |
| 542 | if (ofid) |
| 543 | p9_client_clunk(ofid); |
| 544 | |
| 545 | if (fid) |
| 546 | p9_client_clunk(fid); |
| 547 | |
| 548 | return ERR_PTR(err); |
| 549 | } |
| 550 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 551 | /** |
| 552 | * v9fs_vfs_create - VFS hook to create files |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 553 | * @dir: directory inode that is being created |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 554 | * @dentry: dentry that is being deleted |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 555 | * @mode: create permissions |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 556 | * @nd: path information |
| 557 | * |
| 558 | */ |
| 559 | |
| 560 | static int |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 561 | v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode, |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 562 | struct nameidata *nd) |
| 563 | { |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 564 | int err; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 565 | u32 perm; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 566 | int flags; |
| 567 | struct v9fs_session_info *v9ses; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 568 | struct p9_fid *fid; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 569 | struct file *filp; |
| 570 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 571 | err = 0; |
| 572 | fid = NULL; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 573 | v9ses = v9fs_inode2v9ses(dir); |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 574 | perm = unixmode2p9mode(v9ses, mode); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 575 | if (nd && nd->flags & LOOKUP_OPEN) |
| 576 | flags = nd->intent.open.flags - 1; |
| 577 | else |
| 578 | flags = O_RDWR; |
| 579 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 580 | fid = v9fs_create(v9ses, dir, dentry, NULL, perm, |
Sripathi Kodi | dd6102f | 2010-03-05 18:48:00 +0000 | [diff] [blame] | 581 | v9fs_uflags2omode(flags, |
| 582 | v9fs_proto_dotu(v9ses))); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 583 | if (IS_ERR(fid)) { |
| 584 | err = PTR_ERR(fid); |
| 585 | fid = NULL; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 586 | goto error; |
| 587 | } |
| 588 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 589 | /* 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] | 590 | if (nd && nd->flags & LOOKUP_OPEN) { |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 591 | filp = lookup_instantiate_filp(nd, dentry, v9fs_open_created); |
| 592 | if (IS_ERR(filp)) { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 593 | err = PTR_ERR(filp); |
| 594 | goto error; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 595 | } |
| 596 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 597 | filp->private_data = fid; |
| 598 | } else |
| 599 | p9_client_clunk(fid); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 600 | |
| 601 | return 0; |
| 602 | |
| 603 | error: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 604 | if (fid) |
| 605 | p9_client_clunk(fid); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 606 | |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 607 | return err; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 608 | } |
| 609 | |
| 610 | /** |
| 611 | * v9fs_vfs_mkdir - VFS mkdir hook to create a directory |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 612 | * @dir: inode that is being unlinked |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 613 | * @dentry: dentry that is being unlinked |
| 614 | * @mode: mode for new directory |
| 615 | * |
| 616 | */ |
| 617 | |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 618 | 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] | 619 | { |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 620 | int err; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 621 | u32 perm; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 622 | struct v9fs_session_info *v9ses; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 623 | struct p9_fid *fid; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 624 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 625 | P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); |
| 626 | err = 0; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 627 | v9ses = v9fs_inode2v9ses(dir); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 628 | perm = unixmode2p9mode(v9ses, mode | S_IFDIR); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 629 | fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD); |
| 630 | if (IS_ERR(fid)) { |
| 631 | err = PTR_ERR(fid); |
| 632 | fid = NULL; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 633 | } |
| 634 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 635 | if (fid) |
| 636 | p9_client_clunk(fid); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 637 | |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 638 | return err; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 639 | } |
| 640 | |
| 641 | /** |
| 642 | * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode |
| 643 | * @dir: inode that is being walked from |
| 644 | * @dentry: dentry that is being walked to? |
| 645 | * @nameidata: path data |
| 646 | * |
| 647 | */ |
| 648 | |
| 649 | static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, |
| 650 | struct nameidata *nameidata) |
| 651 | { |
| 652 | struct super_block *sb; |
| 653 | struct v9fs_session_info *v9ses; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 654 | struct p9_fid *dfid, *fid; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 655 | struct inode *inode; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 656 | char *name; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 657 | int result = 0; |
| 658 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 659 | 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] | 660 | dir, dentry->d_name.name, dentry, nameidata); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 661 | |
Sripathi Kodi | 11e9b49 | 2010-03-29 18:13:59 -0500 | [diff] [blame] | 662 | if (dentry->d_name.len > NAME_MAX) |
| 663 | return ERR_PTR(-ENAMETOOLONG); |
| 664 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 665 | sb = dir->i_sb; |
| 666 | v9ses = v9fs_inode2v9ses(dir); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 667 | dfid = v9fs_fid_lookup(dentry->d_parent); |
| 668 | if (IS_ERR(dfid)) |
David Howells | e231c2e | 2008-02-07 00:15:26 -0800 | [diff] [blame] | 669 | return ERR_CAST(dfid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 670 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 671 | name = (char *) dentry->d_name.name; |
| 672 | fid = p9_client_walk(dfid, 1, &name, 1); |
| 673 | if (IS_ERR(fid)) { |
| 674 | result = PTR_ERR(fid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 675 | if (result == -ENOENT) { |
| 676 | d_add(dentry, NULL); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 677 | return NULL; |
| 678 | } |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 679 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 680 | return ERR_PTR(result); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 681 | } |
| 682 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 683 | inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); |
| 684 | if (IS_ERR(inode)) { |
| 685 | result = PTR_ERR(inode); |
| 686 | inode = NULL; |
| 687 | goto error; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 688 | } |
| 689 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 690 | result = v9fs_fid_add(dentry, fid); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 691 | if (result < 0) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 692 | goto error; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 693 | |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 694 | if ((fid->qid.version) && (v9ses->cache)) |
Eric Van Hensbergen | e03abc0 | 2007-02-11 13:21:39 -0600 | [diff] [blame] | 695 | dentry->d_op = &v9fs_cached_dentry_operations; |
| 696 | else |
| 697 | dentry->d_op = &v9fs_dentry_operations; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 698 | |
| 699 | d_add(dentry, inode); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 700 | return NULL; |
| 701 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 702 | error: |
Julien Brunel | 62aa528 | 2008-09-24 16:22:22 -0500 | [diff] [blame] | 703 | p9_client_clunk(fid); |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 704 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 705 | return ERR_PTR(result); |
| 706 | } |
| 707 | |
| 708 | /** |
| 709 | * v9fs_vfs_unlink - VFS unlink hook to delete an inode |
| 710 | * @i: inode that is being unlinked |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 711 | * @d: dentry that is being unlinked |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 712 | * |
| 713 | */ |
| 714 | |
| 715 | static int v9fs_vfs_unlink(struct inode *i, struct dentry *d) |
| 716 | { |
| 717 | return v9fs_remove(i, d, 0); |
| 718 | } |
| 719 | |
| 720 | /** |
| 721 | * v9fs_vfs_rmdir - VFS unlink hook to delete a directory |
| 722 | * @i: inode that is being unlinked |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 723 | * @d: dentry that is being unlinked |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 724 | * |
| 725 | */ |
| 726 | |
| 727 | static int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) |
| 728 | { |
| 729 | return v9fs_remove(i, d, 1); |
| 730 | } |
| 731 | |
| 732 | /** |
| 733 | * v9fs_vfs_rename - VFS hook to rename an inode |
| 734 | * @old_dir: old dir inode |
| 735 | * @old_dentry: old dentry |
| 736 | * @new_dir: new dir inode |
| 737 | * @new_dentry: new dentry |
| 738 | * |
| 739 | */ |
| 740 | |
| 741 | static int |
| 742 | v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry, |
| 743 | struct inode *new_dir, struct dentry *new_dentry) |
| 744 | { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 745 | struct inode *old_inode; |
| 746 | struct v9fs_session_info *v9ses; |
| 747 | struct p9_fid *oldfid; |
| 748 | struct p9_fid *olddirfid; |
| 749 | struct p9_fid *newdirfid; |
| 750 | struct p9_wstat wstat; |
| 751 | int retval; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 752 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 753 | P9_DPRINTK(P9_DEBUG_VFS, "\n"); |
| 754 | retval = 0; |
| 755 | old_inode = old_dentry->d_inode; |
| 756 | v9ses = v9fs_inode2v9ses(old_inode); |
| 757 | oldfid = v9fs_fid_lookup(old_dentry); |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 758 | if (IS_ERR(oldfid)) |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 759 | return PTR_ERR(oldfid); |
| 760 | |
| 761 | olddirfid = v9fs_fid_clone(old_dentry->d_parent); |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 762 | if (IS_ERR(olddirfid)) { |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 763 | retval = PTR_ERR(olddirfid); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 764 | goto done; |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 765 | } |
| 766 | |
| 767 | newdirfid = v9fs_fid_clone(new_dentry->d_parent); |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 768 | if (IS_ERR(newdirfid)) { |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 769 | retval = PTR_ERR(newdirfid); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 770 | goto clunk_olddir; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 771 | } |
| 772 | |
| 773 | /* 9P can only handle file rename in the same directory */ |
| 774 | if (memcmp(&olddirfid->qid, &newdirfid->qid, sizeof(newdirfid->qid))) { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 775 | P9_DPRINTK(P9_DEBUG_ERROR, |
| 776 | "old dir and new dir are different\n"); |
Eric Van Hensbergen | 621997c | 2007-01-26 00:57:04 -0800 | [diff] [blame] | 777 | retval = -EXDEV; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 778 | goto clunk_newdir; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 779 | } |
| 780 | |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 781 | v9fs_blank_wstat(&wstat); |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 782 | wstat.muid = v9ses->uname; |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 783 | wstat.name = (char *) new_dentry->d_name.name; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 784 | retval = p9_client_wstat(oldfid, &wstat); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 785 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 786 | clunk_newdir: |
Latchesar Ionkov | 22150c4 | 2007-10-23 13:48:33 -0500 | [diff] [blame] | 787 | p9_client_clunk(newdirfid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 788 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 789 | clunk_olddir: |
Latchesar Ionkov | 22150c4 | 2007-10-23 13:48:33 -0500 | [diff] [blame] | 790 | p9_client_clunk(olddirfid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 791 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 792 | done: |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 793 | return retval; |
| 794 | } |
| 795 | |
| 796 | /** |
Adrian Bunk | 943ffb5 | 2006-01-10 00:10:13 +0100 | [diff] [blame] | 797 | * v9fs_vfs_getattr - retrieve file metadata |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 798 | * @mnt: mount information |
| 799 | * @dentry: file to get attributes on |
| 800 | * @stat: metadata structure to populate |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 801 | * |
| 802 | */ |
| 803 | |
| 804 | static int |
| 805 | v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry, |
| 806 | struct kstat *stat) |
| 807 | { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 808 | int err; |
| 809 | struct v9fs_session_info *v9ses; |
| 810 | struct p9_fid *fid; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 811 | struct p9_wstat *st; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 812 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 813 | P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry); |
| 814 | err = -EPERM; |
| 815 | v9ses = v9fs_inode2v9ses(dentry->d_inode); |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 816 | if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) |
Eric Van Hensbergen | 9523a84 | 2007-07-13 13:01:27 -0500 | [diff] [blame] | 817 | return simple_getattr(mnt, dentry, stat); |
| 818 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 819 | fid = v9fs_fid_lookup(dentry); |
| 820 | if (IS_ERR(fid)) |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 821 | return PTR_ERR(fid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 822 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 823 | st = p9_client_stat(fid); |
| 824 | if (IS_ERR(st)) |
| 825 | return PTR_ERR(st); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 826 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 827 | v9fs_stat2inode(st, dentry->d_inode, dentry->d_inode->i_sb); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 828 | generic_fillattr(dentry->d_inode, stat); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 829 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 830 | kfree(st); |
| 831 | return 0; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 832 | } |
| 833 | |
| 834 | /** |
| 835 | * v9fs_vfs_setattr - set file metadata |
| 836 | * @dentry: file whose metadata to set |
| 837 | * @iattr: metadata assignment structure |
| 838 | * |
| 839 | */ |
| 840 | |
| 841 | static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr) |
| 842 | { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 843 | int retval; |
| 844 | struct v9fs_session_info *v9ses; |
| 845 | struct p9_fid *fid; |
| 846 | struct p9_wstat wstat; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 847 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 848 | P9_DPRINTK(P9_DEBUG_VFS, "\n"); |
| 849 | retval = -EPERM; |
| 850 | v9ses = v9fs_inode2v9ses(dentry->d_inode); |
| 851 | fid = v9fs_fid_lookup(dentry); |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 852 | if(IS_ERR(fid)) |
| 853 | return PTR_ERR(fid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 854 | |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 855 | v9fs_blank_wstat(&wstat); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 856 | if (iattr->ia_valid & ATTR_MODE) |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 857 | wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 858 | |
| 859 | if (iattr->ia_valid & ATTR_MTIME) |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 860 | wstat.mtime = iattr->ia_mtime.tv_sec; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 861 | |
| 862 | if (iattr->ia_valid & ATTR_ATIME) |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 863 | wstat.atime = iattr->ia_atime.tv_sec; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 864 | |
| 865 | if (iattr->ia_valid & ATTR_SIZE) |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 866 | wstat.length = iattr->ia_size; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 867 | |
Sripathi Kodi | dd6102f | 2010-03-05 18:48:00 +0000 | [diff] [blame] | 868 | if (v9fs_proto_dotu(v9ses)) { |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 869 | if (iattr->ia_valid & ATTR_UID) |
| 870 | wstat.n_uid = iattr->ia_uid; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 871 | |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 872 | if (iattr->ia_valid & ATTR_GID) |
| 873 | wstat.n_gid = iattr->ia_gid; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 874 | } |
| 875 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 876 | retval = p9_client_wstat(fid, &wstat); |
| 877 | if (retval >= 0) |
| 878 | retval = inode_setattr(dentry->d_inode, iattr); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 879 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 880 | return retval; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 881 | } |
| 882 | |
| 883 | /** |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 884 | * v9fs_stat2inode - populate an inode structure with mistat info |
| 885 | * @stat: Plan 9 metadata (mistat) structure |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 886 | * @inode: inode to populate |
| 887 | * @sb: superblock of filesystem |
| 888 | * |
| 889 | */ |
| 890 | |
| 891 | void |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 892 | v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode, |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 893 | struct super_block *sb) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 894 | { |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 895 | char ext[32]; |
Aneesh Kumar K.V | 5717144 | 2010-03-05 14:43:43 -0600 | [diff] [blame] | 896 | char tag_name[14]; |
| 897 | unsigned int i_nlink; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 898 | struct v9fs_session_info *v9ses = sb->s_fs_info; |
| 899 | |
| 900 | inode->i_nlink = 1; |
| 901 | |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 902 | inode->i_atime.tv_sec = stat->atime; |
| 903 | inode->i_mtime.tv_sec = stat->mtime; |
| 904 | inode->i_ctime.tv_sec = stat->mtime; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 905 | |
Latchesar Ionkov | bd32b82 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 906 | inode->i_uid = v9ses->dfltuid; |
| 907 | inode->i_gid = v9ses->dfltgid; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 908 | |
Sripathi Kodi | dd6102f | 2010-03-05 18:48:00 +0000 | [diff] [blame] | 909 | if (v9fs_proto_dotu(v9ses)) { |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 910 | inode->i_uid = stat->n_uid; |
| 911 | inode->i_gid = stat->n_gid; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 912 | } |
Aneesh Kumar K.V | 5717144 | 2010-03-05 14:43:43 -0600 | [diff] [blame] | 913 | if ((S_ISREG(inode->i_mode)) || (S_ISDIR(inode->i_mode))) { |
| 914 | if (v9fs_proto_dotu(v9ses) && (stat->extension[0] != '\0')) { |
| 915 | /* |
| 916 | * Hadlink support got added later to |
| 917 | * to the .u extension. So there can be |
| 918 | * server out there that doesn't support |
| 919 | * this even with .u extension. So check |
| 920 | * for non NULL stat->extension |
| 921 | */ |
| 922 | strncpy(ext, stat->extension, sizeof(ext)); |
| 923 | /* HARDLINKCOUNT %u */ |
| 924 | sscanf(ext, "%13s %u", tag_name, &i_nlink); |
| 925 | if (!strncmp(tag_name, "HARDLINKCOUNT", 13)) |
| 926 | inode->i_nlink = i_nlink; |
| 927 | } |
| 928 | } |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 929 | inode->i_mode = p9mode2unixmode(v9ses, stat->mode); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 930 | if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) { |
| 931 | char type = 0; |
| 932 | int major = -1; |
| 933 | int minor = -1; |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 934 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 935 | strncpy(ext, stat->extension, sizeof(ext)); |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 936 | sscanf(ext, "%c %u %u", &type, &major, &minor); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 937 | switch (type) { |
| 938 | case 'c': |
| 939 | inode->i_mode &= ~S_IFBLK; |
| 940 | inode->i_mode |= S_IFCHR; |
| 941 | break; |
| 942 | case 'b': |
| 943 | break; |
| 944 | default: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 945 | P9_DPRINTK(P9_DEBUG_ERROR, |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 946 | "Unknown special type %c %s\n", type, |
| 947 | stat->extension); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 948 | }; |
| 949 | inode->i_rdev = MKDEV(major, minor); |
Magnus Deininger | 57c7b4e | 2008-10-17 12:44:46 -0500 | [diff] [blame] | 950 | init_special_inode(inode, inode->i_mode, inode->i_rdev); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 951 | } else |
| 952 | inode->i_rdev = 0; |
| 953 | |
Abhishek Kulkarni | 7549ae3 | 2009-09-22 11:34:05 -0500 | [diff] [blame] | 954 | i_size_write(inode, stat->length); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 955 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 956 | /* not real number of blocks, but 512 byte ones ... */ |
Abhishek Kulkarni | 7549ae3 | 2009-09-22 11:34:05 -0500 | [diff] [blame] | 957 | inode->i_blocks = (i_size_read(inode) + 512 - 1) >> 9; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 958 | } |
| 959 | |
| 960 | /** |
| 961 | * v9fs_qid2ino - convert qid into inode number |
| 962 | * @qid: qid to hash |
| 963 | * |
| 964 | * BUG: potential for inode number collisions? |
| 965 | */ |
| 966 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 967 | ino_t v9fs_qid2ino(struct p9_qid *qid) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 968 | { |
| 969 | u64 path = qid->path + 2; |
| 970 | ino_t i = 0; |
| 971 | |
| 972 | if (sizeof(ino_t) == sizeof(path)) |
| 973 | memcpy(&i, &path, sizeof(ino_t)); |
| 974 | else |
| 975 | i = (ino_t) (path ^ (path >> 32)); |
| 976 | |
| 977 | return i; |
| 978 | } |
| 979 | |
| 980 | /** |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 981 | * v9fs_readlink - read a symlink's location (internal version) |
| 982 | * @dentry: dentry for symlink |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 983 | * @buffer: buffer to load symlink location into |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 984 | * @buflen: length of buffer |
| 985 | * |
| 986 | */ |
| 987 | |
| 988 | static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen) |
| 989 | { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 990 | int retval; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 991 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 992 | struct v9fs_session_info *v9ses; |
| 993 | struct p9_fid *fid; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 994 | struct p9_wstat *st; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 995 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 996 | P9_DPRINTK(P9_DEBUG_VFS, " %s\n", dentry->d_name.name); |
| 997 | retval = -EPERM; |
| 998 | v9ses = v9fs_inode2v9ses(dentry->d_inode); |
| 999 | fid = v9fs_fid_lookup(dentry); |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 1000 | if (IS_ERR(fid)) |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 1001 | return PTR_ERR(fid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1002 | |
Sripathi Kodi | dd6102f | 2010-03-05 18:48:00 +0000 | [diff] [blame] | 1003 | if (!v9fs_proto_dotu(v9ses)) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1004 | return -EBADF; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1005 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1006 | st = p9_client_stat(fid); |
| 1007 | if (IS_ERR(st)) |
| 1008 | return PTR_ERR(st); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1009 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1010 | if (!(st->mode & P9_DMSYMLINK)) { |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1011 | retval = -EINVAL; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1012 | goto done; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1013 | } |
| 1014 | |
| 1015 | /* copy extension buffer into buffer */ |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1016 | strncpy(buffer, st->extension, buflen); |
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 | P9_DPRINTK(P9_DEBUG_VFS, |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1019 | "%s -> %s (%s)\n", dentry->d_name.name, st->extension, buffer); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1020 | |
Martin Stava | 2511cd0 | 2009-11-02 08:39:34 -0600 | [diff] [blame] | 1021 | retval = strnlen(buffer, buflen); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1022 | done: |
| 1023 | kfree(st); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1024 | return retval; |
| 1025 | } |
| 1026 | |
| 1027 | /** |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1028 | * v9fs_vfs_follow_link - follow a symlink path |
| 1029 | * @dentry: dentry for symlink |
| 1030 | * @nd: nameidata |
| 1031 | * |
| 1032 | */ |
| 1033 | |
| 1034 | static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd) |
| 1035 | { |
| 1036 | int len = 0; |
| 1037 | char *link = __getname(); |
| 1038 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1039 | P9_DPRINTK(P9_DEBUG_VFS, "%s n", dentry->d_name.name); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1040 | |
| 1041 | if (!link) |
| 1042 | link = ERR_PTR(-ENOMEM); |
| 1043 | else { |
Latchesar Ionkov | 16cce6d | 2006-03-25 03:07:26 -0800 | [diff] [blame] | 1044 | len = v9fs_readlink(dentry, link, PATH_MAX); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1045 | |
| 1046 | if (len < 0) { |
Davi Arnaut | ce44eeb | 2005-11-07 00:59:36 -0800 | [diff] [blame] | 1047 | __putname(link); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1048 | link = ERR_PTR(len); |
| 1049 | } else |
Martin Stava | 2511cd0 | 2009-11-02 08:39:34 -0600 | [diff] [blame] | 1050 | link[min(len, PATH_MAX-1)] = 0; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1051 | } |
| 1052 | nd_set_link(nd, link); |
| 1053 | |
| 1054 | return NULL; |
| 1055 | } |
| 1056 | |
| 1057 | /** |
| 1058 | * v9fs_vfs_put_link - release a symlink path |
| 1059 | * @dentry: dentry for symlink |
| 1060 | * @nd: nameidata |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 1061 | * @p: unused |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1062 | * |
| 1063 | */ |
| 1064 | |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 1065 | static void |
| 1066 | 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] | 1067 | { |
| 1068 | char *s = nd_get_link(nd); |
| 1069 | |
Duane Griffin | 6ff2320 | 2008-12-19 16:45:21 -0600 | [diff] [blame] | 1070 | P9_DPRINTK(P9_DEBUG_VFS, " %s %s\n", dentry->d_name.name, |
| 1071 | IS_ERR(s) ? "<error>" : s); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1072 | if (!IS_ERR(s)) |
Davi Arnaut | ce44eeb | 2005-11-07 00:59:36 -0800 | [diff] [blame] | 1073 | __putname(s); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1074 | } |
| 1075 | |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 1076 | /** |
| 1077 | * v9fs_vfs_mkspecial - create a special file |
| 1078 | * @dir: inode to create special file in |
| 1079 | * @dentry: dentry to create |
| 1080 | * @mode: mode to create special file |
| 1081 | * @extension: 9p2000.u format extension string representing special file |
| 1082 | * |
| 1083 | */ |
| 1084 | |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1085 | static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, |
| 1086 | int mode, const char *extension) |
| 1087 | { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1088 | u32 perm; |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1089 | struct v9fs_session_info *v9ses; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1090 | struct p9_fid *fid; |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1091 | |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 1092 | v9ses = v9fs_inode2v9ses(dir); |
Sripathi Kodi | dd6102f | 2010-03-05 18:48:00 +0000 | [diff] [blame] | 1093 | if (!v9fs_proto_dotu(v9ses)) { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1094 | P9_DPRINTK(P9_DEBUG_ERROR, "not extended\n"); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 1095 | return -EPERM; |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1096 | } |
| 1097 | |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 1098 | perm = unixmode2p9mode(v9ses, mode); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1099 | fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm, |
| 1100 | P9_OREAD); |
| 1101 | if (IS_ERR(fid)) |
| 1102 | return PTR_ERR(fid); |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 1103 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1104 | p9_client_clunk(fid); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 1105 | return 0; |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1106 | } |
| 1107 | |
| 1108 | /** |
| 1109 | * v9fs_vfs_symlink - helper function to create symlinks |
| 1110 | * @dir: directory inode containing symlink |
| 1111 | * @dentry: dentry for symlink |
| 1112 | * @symname: symlink data |
| 1113 | * |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 1114 | * See Also: 9P2000.u RFC for more information |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1115 | * |
| 1116 | */ |
| 1117 | |
| 1118 | static int |
| 1119 | v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname) |
| 1120 | { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1121 | P9_DPRINTK(P9_DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino, |
| 1122 | dentry->d_name.name, symname); |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1123 | |
| 1124 | return v9fs_vfs_mkspecial(dir, dentry, S_IFLNK, symname); |
| 1125 | } |
| 1126 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1127 | /** |
| 1128 | * v9fs_vfs_link - create a hardlink |
| 1129 | * @old_dentry: dentry for file to link to |
| 1130 | * @dir: inode destination for new link |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 1131 | * @dentry: dentry for link |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1132 | * |
| 1133 | */ |
| 1134 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1135 | static int |
| 1136 | v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, |
| 1137 | struct dentry *dentry) |
| 1138 | { |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1139 | int retval; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1140 | struct p9_fid *oldfid; |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1141 | char *name; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1142 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1143 | P9_DPRINTK(P9_DEBUG_VFS, |
| 1144 | " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name, |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1145 | old_dentry->d_name.name); |
| 1146 | |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 1147 | oldfid = v9fs_fid_clone(old_dentry); |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 1148 | if (IS_ERR(oldfid)) |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 1149 | return PTR_ERR(oldfid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1150 | |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1151 | name = __getname(); |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 1152 | if (unlikely(!name)) { |
| 1153 | retval = -ENOMEM; |
| 1154 | goto clunk_fid; |
| 1155 | } |
Florin Malita | 0710d36 | 2006-06-25 05:48:31 -0700 | [diff] [blame] | 1156 | |
Latchesar Ionkov | 16cce6d | 2006-03-25 03:07:26 -0800 | [diff] [blame] | 1157 | sprintf(name, "%d\n", oldfid->fid); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1158 | retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name); |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1159 | __putname(name); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1160 | |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 1161 | clunk_fid: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1162 | p9_client_clunk(oldfid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1163 | return retval; |
| 1164 | } |
| 1165 | |
| 1166 | /** |
| 1167 | * v9fs_vfs_mknod - create a special file |
| 1168 | * @dir: inode destination for new link |
| 1169 | * @dentry: dentry for file |
| 1170 | * @mode: mode for creation |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 1171 | * @rdev: device associated with special file |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1172 | * |
| 1173 | */ |
| 1174 | |
| 1175 | static int |
| 1176 | v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev) |
| 1177 | { |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1178 | int retval; |
| 1179 | char *name; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1180 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1181 | P9_DPRINTK(P9_DEBUG_VFS, |
| 1182 | " %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] | 1183 | dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev)); |
| 1184 | |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1185 | if (!new_valid_dev(rdev)) |
| 1186 | return -EINVAL; |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 1187 | |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1188 | name = __getname(); |
Eugene Teo | c0291a0 | 2006-03-25 03:07:27 -0800 | [diff] [blame] | 1189 | if (!name) |
| 1190 | return -ENOMEM; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1191 | /* build extension */ |
| 1192 | if (S_ISBLK(mode)) |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1193 | sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev)); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1194 | else if (S_ISCHR(mode)) |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1195 | sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev)); |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 1196 | else if (S_ISFIFO(mode)) |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1197 | *name = 0; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1198 | else { |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1199 | __putname(name); |
| 1200 | return -EINVAL; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1201 | } |
| 1202 | |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1203 | retval = v9fs_vfs_mkspecial(dir, dentry, mode, name); |
| 1204 | __putname(name); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1205 | |
| 1206 | return retval; |
| 1207 | } |
| 1208 | |
Arjan van de Ven | 754661f | 2007-02-12 00:55:38 -0800 | [diff] [blame] | 1209 | static const struct inode_operations v9fs_dir_inode_operations_ext = { |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1210 | .create = v9fs_vfs_create, |
| 1211 | .lookup = v9fs_vfs_lookup, |
| 1212 | .symlink = v9fs_vfs_symlink, |
| 1213 | .link = v9fs_vfs_link, |
| 1214 | .unlink = v9fs_vfs_unlink, |
| 1215 | .mkdir = v9fs_vfs_mkdir, |
| 1216 | .rmdir = v9fs_vfs_rmdir, |
| 1217 | .mknod = v9fs_vfs_mknod, |
| 1218 | .rename = v9fs_vfs_rename, |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1219 | .getattr = v9fs_vfs_getattr, |
| 1220 | .setattr = v9fs_vfs_setattr, |
| 1221 | }; |
| 1222 | |
Arjan van de Ven | 754661f | 2007-02-12 00:55:38 -0800 | [diff] [blame] | 1223 | static const struct inode_operations v9fs_dir_inode_operations = { |
Eric Van Hensbergen | b501611 | 2005-09-09 13:04:27 -0700 | [diff] [blame] | 1224 | .create = v9fs_vfs_create, |
| 1225 | .lookup = v9fs_vfs_lookup, |
| 1226 | .unlink = v9fs_vfs_unlink, |
| 1227 | .mkdir = v9fs_vfs_mkdir, |
| 1228 | .rmdir = v9fs_vfs_rmdir, |
| 1229 | .mknod = v9fs_vfs_mknod, |
| 1230 | .rename = v9fs_vfs_rename, |
| 1231 | .getattr = v9fs_vfs_getattr, |
| 1232 | .setattr = v9fs_vfs_setattr, |
| 1233 | }; |
| 1234 | |
Arjan van de Ven | 754661f | 2007-02-12 00:55:38 -0800 | [diff] [blame] | 1235 | static const struct inode_operations v9fs_file_inode_operations = { |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1236 | .getattr = v9fs_vfs_getattr, |
| 1237 | .setattr = v9fs_vfs_setattr, |
| 1238 | }; |
| 1239 | |
Arjan van de Ven | 754661f | 2007-02-12 00:55:38 -0800 | [diff] [blame] | 1240 | static const struct inode_operations v9fs_symlink_inode_operations = { |
Al Viro | 204f2f0 | 2009-12-23 00:35:54 -0500 | [diff] [blame] | 1241 | .readlink = generic_readlink, |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1242 | .follow_link = v9fs_vfs_follow_link, |
| 1243 | .put_link = v9fs_vfs_put_link, |
| 1244 | .getattr = v9fs_vfs_getattr, |
| 1245 | .setattr = v9fs_vfs_setattr, |
| 1246 | }; |