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> |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 37 | #include <net/9p/9p.h> |
| 38 | #include <net/9p/client.h> |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 39 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 40 | #include "v9fs.h" |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 41 | #include "v9fs_vfs.h" |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 42 | #include "fid.h" |
| 43 | |
Arjan van de Ven | 754661f | 2007-02-12 00:55:38 -0800 | [diff] [blame] | 44 | static const struct inode_operations v9fs_dir_inode_operations; |
| 45 | static const struct inode_operations v9fs_dir_inode_operations_ext; |
| 46 | static const struct inode_operations v9fs_file_inode_operations; |
| 47 | static const struct inode_operations v9fs_symlink_inode_operations; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 48 | |
| 49 | /** |
| 50 | * unixmode2p9mode - convert unix mode bits to plan 9 |
| 51 | * @v9ses: v9fs session information |
| 52 | * @mode: mode to convert |
| 53 | * |
| 54 | */ |
| 55 | |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 56 | static int unixmode2p9mode(struct v9fs_session_info *v9ses, int mode) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 57 | { |
| 58 | int res; |
| 59 | res = mode & 0777; |
| 60 | if (S_ISDIR(mode)) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 61 | res |= P9_DMDIR; |
Latchesar Ionkov | 2405669 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 62 | if (v9fs_extended(v9ses)) { |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 63 | if (S_ISLNK(mode)) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 64 | res |= P9_DMSYMLINK; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 65 | if (v9ses->nodev == 0) { |
| 66 | if (S_ISSOCK(mode)) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 67 | res |= P9_DMSOCKET; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 68 | if (S_ISFIFO(mode)) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 69 | res |= P9_DMNAMEDPIPE; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 70 | if (S_ISBLK(mode)) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 71 | res |= P9_DMDEVICE; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 72 | if (S_ISCHR(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 | } |
| 75 | |
| 76 | if ((mode & S_ISUID) == S_ISUID) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 77 | res |= P9_DMSETUID; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 78 | if ((mode & S_ISGID) == S_ISGID) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 79 | res |= P9_DMSETGID; |
Anthony Liguori | d199d65 | 2008-02-06 19:25:06 -0600 | [diff] [blame] | 80 | if ((mode & S_ISVTX) == S_ISVTX) |
| 81 | res |= P9_DMSETVTX; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 82 | if ((mode & P9_DMLINK)) |
| 83 | res |= P9_DMLINK; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 84 | } |
| 85 | |
| 86 | return res; |
| 87 | } |
| 88 | |
| 89 | /** |
| 90 | * p9mode2unixmode- convert plan9 mode bits to unix mode bits |
| 91 | * @v9ses: v9fs session information |
| 92 | * @mode: mode to convert |
| 93 | * |
| 94 | */ |
| 95 | |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 96 | static int p9mode2unixmode(struct v9fs_session_info *v9ses, int mode) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 97 | { |
| 98 | int res; |
| 99 | |
| 100 | res = mode & 0777; |
| 101 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 102 | if ((mode & P9_DMDIR) == P9_DMDIR) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 103 | res |= S_IFDIR; |
Latchesar Ionkov | 2405669 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 104 | else if ((mode & P9_DMSYMLINK) && (v9fs_extended(v9ses))) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 105 | res |= S_IFLNK; |
Latchesar Ionkov | 2405669 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 106 | else if ((mode & P9_DMSOCKET) && (v9fs_extended(v9ses)) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 107 | && (v9ses->nodev == 0)) |
| 108 | res |= S_IFSOCK; |
Latchesar Ionkov | 2405669 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 109 | else if ((mode & P9_DMNAMEDPIPE) && (v9fs_extended(v9ses)) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 110 | && (v9ses->nodev == 0)) |
| 111 | res |= S_IFIFO; |
Latchesar Ionkov | 2405669 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 112 | else if ((mode & P9_DMDEVICE) && (v9fs_extended(v9ses)) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 113 | && (v9ses->nodev == 0)) |
| 114 | res |= S_IFBLK; |
| 115 | else |
| 116 | res |= S_IFREG; |
| 117 | |
Latchesar Ionkov | 2405669 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 118 | if (v9fs_extended(v9ses)) { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 119 | if ((mode & P9_DMSETUID) == P9_DMSETUID) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 120 | res |= S_ISUID; |
| 121 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 122 | if ((mode & P9_DMSETGID) == P9_DMSETGID) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 123 | res |= S_ISGID; |
Anthony Liguori | d199d65 | 2008-02-06 19:25:06 -0600 | [diff] [blame] | 124 | |
| 125 | if ((mode & P9_DMSETVTX) == P9_DMSETVTX) |
| 126 | res |= S_ISVTX; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 127 | } |
| 128 | |
| 129 | return res; |
| 130 | } |
| 131 | |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 132 | /** |
| 133 | * v9fs_uflags2omode- convert posix open flags to plan 9 mode bits |
| 134 | * @uflags: flags to convert |
Eric Van Hensbergen | 2e4bef4 | 2008-06-24 17:39:39 -0500 | [diff] [blame] | 135 | * @extended: if .u extensions are active |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 136 | */ |
| 137 | |
Eric Van Hensbergen | 2e4bef4 | 2008-06-24 17:39:39 -0500 | [diff] [blame] | 138 | int v9fs_uflags2omode(int uflags, int extended) |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 139 | { |
| 140 | int ret; |
| 141 | |
| 142 | ret = 0; |
| 143 | switch (uflags&3) { |
| 144 | default: |
| 145 | case O_RDONLY: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 146 | ret = P9_OREAD; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 147 | break; |
| 148 | |
| 149 | case O_WRONLY: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 150 | ret = P9_OWRITE; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 151 | break; |
| 152 | |
| 153 | case O_RDWR: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 154 | ret = P9_ORDWR; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 155 | break; |
| 156 | } |
| 157 | |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 158 | if (uflags & O_TRUNC) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 159 | ret |= P9_OTRUNC; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 160 | |
Eric Van Hensbergen | 2e4bef4 | 2008-06-24 17:39:39 -0500 | [diff] [blame] | 161 | if (extended) { |
| 162 | if (uflags & O_EXCL) |
| 163 | ret |= P9_OEXCL; |
| 164 | |
| 165 | if (uflags & O_APPEND) |
| 166 | ret |= P9_OAPPEND; |
| 167 | } |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 168 | |
| 169 | return ret; |
| 170 | } |
| 171 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 172 | /** |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 173 | * v9fs_blank_wstat - helper function to setup a 9P stat structure |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 174 | * @v9ses: 9P session info (for determining extended mode) |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 175 | * @wstat: structure to initialize |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 176 | * |
| 177 | */ |
| 178 | |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 179 | static void |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 180 | v9fs_blank_wstat(struct p9_wstat *wstat) |
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 | wstat->type = ~0; |
| 183 | wstat->dev = ~0; |
| 184 | wstat->qid.type = ~0; |
| 185 | wstat->qid.version = ~0; |
| 186 | *((long long *)&wstat->qid.path) = ~0; |
| 187 | wstat->mode = ~0; |
| 188 | wstat->atime = ~0; |
| 189 | wstat->mtime = ~0; |
| 190 | wstat->length = ~0; |
| 191 | wstat->name = NULL; |
| 192 | wstat->uid = NULL; |
| 193 | wstat->gid = NULL; |
| 194 | wstat->muid = NULL; |
| 195 | wstat->n_uid = ~0; |
| 196 | wstat->n_gid = ~0; |
| 197 | wstat->n_muid = ~0; |
| 198 | wstat->extension = NULL; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 199 | } |
| 200 | |
| 201 | /** |
| 202 | * v9fs_get_inode - helper function to setup an inode |
| 203 | * @sb: superblock |
| 204 | * @mode: mode to setup inode with |
| 205 | * |
| 206 | */ |
| 207 | |
| 208 | struct inode *v9fs_get_inode(struct super_block *sb, int mode) |
| 209 | { |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 210 | struct inode *inode; |
Eric Van Hensbergen | b501611 | 2005-09-09 13:04:27 -0700 | [diff] [blame] | 211 | struct v9fs_session_info *v9ses = sb->s_fs_info; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 212 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 213 | 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] | 214 | |
| 215 | inode = new_inode(sb); |
| 216 | if (inode) { |
| 217 | inode->i_mode = mode; |
David Howells | f8b9d53 | 2008-11-14 10:38:44 +1100 | [diff] [blame] | 218 | inode->i_uid = current_fsuid(); |
| 219 | inode->i_gid = current_fsgid(); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 220 | inode->i_blocks = 0; |
| 221 | inode->i_rdev = 0; |
| 222 | inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; |
Eric Van Hensbergen | 147b31c | 2006-01-18 17:43:02 -0800 | [diff] [blame] | 223 | inode->i_mapping->a_ops = &v9fs_addr_operations; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 224 | |
| 225 | switch (mode & S_IFMT) { |
| 226 | case S_IFIFO: |
| 227 | case S_IFBLK: |
| 228 | case S_IFCHR: |
| 229 | case S_IFSOCK: |
Latchesar Ionkov | 2405669 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 230 | if (!v9fs_extended(v9ses)) { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 231 | P9_DPRINTK(P9_DEBUG_ERROR, |
| 232 | "special files without extended mode\n"); |
Eric Van Hensbergen | b501611 | 2005-09-09 13:04:27 -0700 | [diff] [blame] | 233 | return ERR_PTR(-EINVAL); |
| 234 | } |
Eric Van Hensbergen | 5d58bec | 2005-09-09 13:04:27 -0700 | [diff] [blame] | 235 | init_special_inode(inode, inode->i_mode, |
| 236 | inode->i_rdev); |
| 237 | break; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 238 | case S_IFREG: |
| 239 | inode->i_op = &v9fs_file_inode_operations; |
| 240 | inode->i_fop = &v9fs_file_operations; |
| 241 | break; |
Eric Van Hensbergen | b501611 | 2005-09-09 13:04:27 -0700 | [diff] [blame] | 242 | case S_IFLNK: |
Latchesar Ionkov | 2405669 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 243 | if (!v9fs_extended(v9ses)) { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 244 | P9_DPRINTK(P9_DEBUG_ERROR, |
| 245 | "extended modes used w/o 9P2000.u\n"); |
Eric Van Hensbergen | b501611 | 2005-09-09 13:04:27 -0700 | [diff] [blame] | 246 | return ERR_PTR(-EINVAL); |
| 247 | } |
| 248 | inode->i_op = &v9fs_symlink_inode_operations; |
| 249 | break; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 250 | case S_IFDIR: |
Dave Hansen | d8c76e6 | 2006-09-30 23:29:04 -0700 | [diff] [blame] | 251 | inc_nlink(inode); |
Latchesar Ionkov | 2405669 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 252 | if (v9fs_extended(v9ses)) |
Eric Van Hensbergen | b501611 | 2005-09-09 13:04:27 -0700 | [diff] [blame] | 253 | inode->i_op = &v9fs_dir_inode_operations_ext; |
| 254 | else |
| 255 | inode->i_op = &v9fs_dir_inode_operations; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 256 | inode->i_fop = &v9fs_dir_operations; |
| 257 | break; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 258 | default: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 259 | P9_DPRINTK(P9_DEBUG_ERROR, |
| 260 | "BAD mode 0x%x S_IFMT 0x%x\n", |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 261 | mode, mode & S_IFMT); |
| 262 | return ERR_PTR(-EINVAL); |
| 263 | } |
| 264 | } else { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 265 | P9_EPRINTK(KERN_WARNING, "Problem allocating inode\n"); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 266 | return ERR_PTR(-ENOMEM); |
| 267 | } |
| 268 | return inode; |
| 269 | } |
| 270 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 271 | /* |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 272 | static struct v9fs_fid* |
| 273 | v9fs_clone_walk(struct v9fs_session_info *v9ses, u32 fid, struct dentry *dentry) |
| 274 | { |
| 275 | int err; |
Mika Kukkonen | 736c4b85 | 2006-12-06 20:36:29 -0800 | [diff] [blame] | 276 | int nfid; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 277 | struct v9fs_fid *ret; |
| 278 | struct v9fs_fcall *fcall; |
| 279 | |
| 280 | nfid = v9fs_get_idpool(&v9ses->fidpool); |
| 281 | if (nfid < 0) { |
| 282 | eprintk(KERN_WARNING, "no free fids available\n"); |
Latchesar Ionkov | 731805b | 2006-03-07 21:55:42 -0800 | [diff] [blame] | 283 | return ERR_PTR(-ENOSPC); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 284 | } |
| 285 | |
| 286 | err = v9fs_t_walk(v9ses, fid, nfid, (char *) dentry->d_name.name, |
| 287 | &fcall); |
| 288 | |
| 289 | if (err < 0) { |
Latchesar Ionkov | 41e5a6a | 2006-05-15 09:44:21 -0700 | [diff] [blame] | 290 | if (fcall && fcall->id == RWALK) |
| 291 | goto clunk_fid; |
| 292 | |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 293 | PRINT_FCALL_ERROR("walk error", fcall); |
| 294 | v9fs_put_idpool(nfid, &v9ses->fidpool); |
| 295 | goto error; |
| 296 | } |
| 297 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 298 | kfree(fcall); |
Latchesar Ionkov | 3cf6429 | 2006-01-08 01:04:58 -0800 | [diff] [blame] | 299 | fcall = NULL; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 300 | ret = v9fs_fid_create(v9ses, nfid); |
| 301 | if (!ret) { |
| 302 | err = -ENOMEM; |
| 303 | goto clunk_fid; |
| 304 | } |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 305 | |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 306 | err = v9fs_fid_insert(ret, dentry); |
| 307 | if (err < 0) { |
| 308 | v9fs_fid_destroy(ret); |
| 309 | goto clunk_fid; |
Latchesar Ionkov | 0b8dd17 | 2005-09-27 21:45:24 -0700 | [diff] [blame] | 310 | } |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 311 | |
| 312 | return ret; |
| 313 | |
| 314 | clunk_fid: |
| 315 | v9fs_t_clunk(v9ses, nfid); |
| 316 | |
| 317 | error: |
| 318 | kfree(fcall); |
| 319 | return ERR_PTR(err); |
| 320 | } |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 321 | */ |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 322 | |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 323 | /** |
| 324 | * v9fs_inode_from_fid - populate an inode by issuing a attribute request |
| 325 | * @v9ses: session information |
| 326 | * @fid: fid to issue attribute request for |
| 327 | * @sb: superblock on which to create inode |
| 328 | * |
| 329 | */ |
| 330 | |
Latchesar Ionkov | 5174fda | 2006-03-25 03:07:25 -0800 | [diff] [blame] | 331 | static struct inode * |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 332 | 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] | 333 | struct super_block *sb) |
| 334 | { |
| 335 | int err, umode; |
| 336 | struct inode *ret; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 337 | struct p9_wstat *st; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 338 | |
| 339 | ret = NULL; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 340 | st = p9_client_stat(fid); |
| 341 | if (IS_ERR(st)) { |
| 342 | err = PTR_ERR(st); |
| 343 | st = NULL; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 344 | goto error; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 345 | } |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 346 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 347 | umode = p9mode2unixmode(v9ses, st->mode); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 348 | ret = v9fs_get_inode(sb, umode); |
| 349 | if (IS_ERR(ret)) { |
| 350 | err = PTR_ERR(ret); |
| 351 | ret = NULL; |
| 352 | goto error; |
| 353 | } |
| 354 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 355 | v9fs_stat2inode(st, ret, sb); |
| 356 | ret->i_ino = v9fs_qid2ino(&st->qid); |
| 357 | kfree(st); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 358 | return ret; |
| 359 | |
| 360 | error: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 361 | kfree(st); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 362 | if (ret) |
| 363 | iput(ret); |
| 364 | |
| 365 | return ERR_PTR(err); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 366 | } |
| 367 | |
| 368 | /** |
| 369 | * v9fs_remove - helper function to remove files and directories |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 370 | * @dir: directory inode that is being deleted |
| 371 | * @file: dentry that is being deleted |
| 372 | * @rmdir: removing a directory |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 373 | * |
| 374 | */ |
| 375 | |
| 376 | static int v9fs_remove(struct inode *dir, struct dentry *file, int rmdir) |
| 377 | { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 378 | struct inode *file_inode; |
| 379 | struct v9fs_session_info *v9ses; |
| 380 | struct p9_fid *v9fid; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 381 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 382 | 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] | 383 | rmdir); |
| 384 | |
| 385 | file_inode = file->d_inode; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 386 | v9ses = v9fs_inode2v9ses(file_inode); |
Latchesar Ionkov | c959df9 | 2007-04-23 14:41:11 -0700 | [diff] [blame] | 387 | v9fid = v9fs_fid_clone(file); |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 388 | if (IS_ERR(v9fid)) |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 389 | return PTR_ERR(v9fid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 390 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 391 | return p9_client_remove(v9fid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 392 | } |
| 393 | |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 394 | static int |
| 395 | v9fs_open_created(struct inode *inode, struct file *file) |
| 396 | { |
| 397 | return 0; |
| 398 | } |
| 399 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 400 | |
| 401 | /** |
| 402 | * v9fs_create - Create a file |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 403 | * @v9ses: session information |
| 404 | * @dir: directory that dentry is being created in |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 405 | * @dentry: dentry that is being created |
| 406 | * @perm: create permissions |
| 407 | * @mode: open mode |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 408 | * @extension: 9p2000.u extension string to support devices, etc. |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 409 | * |
| 410 | */ |
| 411 | static struct p9_fid * |
| 412 | v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir, |
| 413 | struct dentry *dentry, char *extension, u32 perm, u8 mode) |
| 414 | { |
| 415 | int err; |
| 416 | char *name; |
| 417 | struct p9_fid *dfid, *ofid, *fid; |
| 418 | struct inode *inode; |
| 419 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 420 | P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); |
| 421 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 422 | err = 0; |
| 423 | ofid = NULL; |
| 424 | fid = NULL; |
| 425 | name = (char *) dentry->d_name.name; |
| 426 | dfid = v9fs_fid_clone(dentry->d_parent); |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 427 | if (IS_ERR(dfid)) { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 428 | err = PTR_ERR(dfid); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 429 | P9_DPRINTK(P9_DEBUG_VFS, "fid clone failed %d\n", err); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 430 | dfid = NULL; |
| 431 | goto error; |
| 432 | } |
| 433 | |
| 434 | /* clone a fid to use for creation */ |
| 435 | ofid = p9_client_walk(dfid, 0, NULL, 1); |
| 436 | if (IS_ERR(ofid)) { |
| 437 | err = PTR_ERR(ofid); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 438 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 439 | ofid = NULL; |
| 440 | goto error; |
| 441 | } |
| 442 | |
| 443 | err = p9_client_fcreate(ofid, name, perm, mode, extension); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 444 | if (err < 0) { |
| 445 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 446 | goto error; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 447 | } |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 448 | |
| 449 | /* now walk from the parent so we can get unopened fid */ |
| 450 | fid = p9_client_walk(dfid, 1, &name, 0); |
| 451 | if (IS_ERR(fid)) { |
| 452 | err = PTR_ERR(fid); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 453 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 454 | fid = NULL; |
| 455 | goto error; |
| 456 | } else |
| 457 | dfid = NULL; |
| 458 | |
| 459 | /* instantiate inode and assign the unopened fid to the dentry */ |
| 460 | inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); |
| 461 | if (IS_ERR(inode)) { |
| 462 | err = PTR_ERR(inode); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 463 | P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", err); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 464 | goto error; |
| 465 | } |
| 466 | |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 467 | if (v9ses->cache) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 468 | dentry->d_op = &v9fs_cached_dentry_operations; |
| 469 | else |
| 470 | dentry->d_op = &v9fs_dentry_operations; |
| 471 | |
| 472 | d_instantiate(dentry, inode); |
Abhishek Kulkarni | 50fb6d2 | 2009-07-19 13:41:57 -0600 | [diff] [blame^] | 473 | err = v9fs_fid_add(dentry, fid); |
| 474 | if (err < 0) |
| 475 | goto error; |
| 476 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 477 | return ofid; |
| 478 | |
| 479 | error: |
| 480 | if (dfid) |
| 481 | p9_client_clunk(dfid); |
| 482 | |
| 483 | if (ofid) |
| 484 | p9_client_clunk(ofid); |
| 485 | |
| 486 | if (fid) |
| 487 | p9_client_clunk(fid); |
| 488 | |
| 489 | return ERR_PTR(err); |
| 490 | } |
| 491 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 492 | /** |
| 493 | * v9fs_vfs_create - VFS hook to create files |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 494 | * @dir: directory inode that is being created |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 495 | * @dentry: dentry that is being deleted |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 496 | * @mode: create permissions |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 497 | * @nd: path information |
| 498 | * |
| 499 | */ |
| 500 | |
| 501 | static int |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 502 | v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode, |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 503 | struct nameidata *nd) |
| 504 | { |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 505 | int err; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 506 | u32 perm; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 507 | int flags; |
| 508 | struct v9fs_session_info *v9ses; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 509 | struct p9_fid *fid; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 510 | struct file *filp; |
| 511 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 512 | err = 0; |
| 513 | fid = NULL; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 514 | v9ses = v9fs_inode2v9ses(dir); |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 515 | perm = unixmode2p9mode(v9ses, mode); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 516 | if (nd && nd->flags & LOOKUP_OPEN) |
| 517 | flags = nd->intent.open.flags - 1; |
| 518 | else |
| 519 | flags = O_RDWR; |
| 520 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 521 | fid = v9fs_create(v9ses, dir, dentry, NULL, perm, |
Eric Van Hensbergen | 2e4bef4 | 2008-06-24 17:39:39 -0500 | [diff] [blame] | 522 | v9fs_uflags2omode(flags, v9fs_extended(v9ses))); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 523 | if (IS_ERR(fid)) { |
| 524 | err = PTR_ERR(fid); |
| 525 | fid = NULL; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 526 | goto error; |
| 527 | } |
| 528 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 529 | /* 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] | 530 | if (nd && nd->flags & LOOKUP_OPEN) { |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 531 | filp = lookup_instantiate_filp(nd, dentry, v9fs_open_created); |
| 532 | if (IS_ERR(filp)) { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 533 | err = PTR_ERR(filp); |
| 534 | goto error; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 535 | } |
| 536 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 537 | filp->private_data = fid; |
| 538 | } else |
| 539 | p9_client_clunk(fid); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 540 | |
| 541 | return 0; |
| 542 | |
| 543 | error: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 544 | if (fid) |
| 545 | p9_client_clunk(fid); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 546 | |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 547 | return err; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 548 | } |
| 549 | |
| 550 | /** |
| 551 | * v9fs_vfs_mkdir - VFS mkdir hook to create a directory |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 552 | * @dir: inode that is being unlinked |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 553 | * @dentry: dentry that is being unlinked |
| 554 | * @mode: mode for new directory |
| 555 | * |
| 556 | */ |
| 557 | |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 558 | 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] | 559 | { |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 560 | int err; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 561 | u32 perm; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 562 | struct v9fs_session_info *v9ses; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 563 | struct p9_fid *fid; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 564 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 565 | P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); |
| 566 | err = 0; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 567 | v9ses = v9fs_inode2v9ses(dir); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 568 | perm = unixmode2p9mode(v9ses, mode | S_IFDIR); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 569 | fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD); |
| 570 | if (IS_ERR(fid)) { |
| 571 | err = PTR_ERR(fid); |
| 572 | fid = NULL; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 573 | } |
| 574 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 575 | if (fid) |
| 576 | p9_client_clunk(fid); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 577 | |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 578 | return err; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 579 | } |
| 580 | |
| 581 | /** |
| 582 | * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode |
| 583 | * @dir: inode that is being walked from |
| 584 | * @dentry: dentry that is being walked to? |
| 585 | * @nameidata: path data |
| 586 | * |
| 587 | */ |
| 588 | |
| 589 | static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, |
| 590 | struct nameidata *nameidata) |
| 591 | { |
| 592 | struct super_block *sb; |
| 593 | struct v9fs_session_info *v9ses; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 594 | struct p9_fid *dfid, *fid; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 595 | struct inode *inode; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 596 | char *name; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 597 | int result = 0; |
| 598 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 599 | 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] | 600 | dir, dentry->d_name.name, dentry, nameidata); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 601 | |
| 602 | sb = dir->i_sb; |
| 603 | v9ses = v9fs_inode2v9ses(dir); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 604 | dfid = v9fs_fid_lookup(dentry->d_parent); |
| 605 | if (IS_ERR(dfid)) |
David Howells | e231c2e | 2008-02-07 00:15:26 -0800 | [diff] [blame] | 606 | return ERR_CAST(dfid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 607 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 608 | name = (char *) dentry->d_name.name; |
| 609 | fid = p9_client_walk(dfid, 1, &name, 1); |
| 610 | if (IS_ERR(fid)) { |
| 611 | result = PTR_ERR(fid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 612 | if (result == -ENOENT) { |
| 613 | d_add(dentry, NULL); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 614 | return NULL; |
| 615 | } |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 616 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 617 | return ERR_PTR(result); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 618 | } |
| 619 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 620 | inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); |
| 621 | if (IS_ERR(inode)) { |
| 622 | result = PTR_ERR(inode); |
| 623 | inode = NULL; |
| 624 | goto error; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 625 | } |
| 626 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 627 | result = v9fs_fid_add(dentry, fid); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 628 | if (result < 0) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 629 | goto error; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 630 | |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 631 | if ((fid->qid.version) && (v9ses->cache)) |
Eric Van Hensbergen | e03abc0 | 2007-02-11 13:21:39 -0600 | [diff] [blame] | 632 | dentry->d_op = &v9fs_cached_dentry_operations; |
| 633 | else |
| 634 | dentry->d_op = &v9fs_dentry_operations; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 635 | |
| 636 | d_add(dentry, inode); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 637 | return NULL; |
| 638 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 639 | error: |
Julien Brunel | 62aa528 | 2008-09-24 16:22:22 -0500 | [diff] [blame] | 640 | p9_client_clunk(fid); |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 641 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 642 | return ERR_PTR(result); |
| 643 | } |
| 644 | |
| 645 | /** |
| 646 | * v9fs_vfs_unlink - VFS unlink hook to delete an inode |
| 647 | * @i: inode that is being unlinked |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 648 | * @d: dentry that is being unlinked |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 649 | * |
| 650 | */ |
| 651 | |
| 652 | static int v9fs_vfs_unlink(struct inode *i, struct dentry *d) |
| 653 | { |
| 654 | return v9fs_remove(i, d, 0); |
| 655 | } |
| 656 | |
| 657 | /** |
| 658 | * v9fs_vfs_rmdir - VFS unlink hook to delete a directory |
| 659 | * @i: inode that is being unlinked |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 660 | * @d: dentry that is being unlinked |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 661 | * |
| 662 | */ |
| 663 | |
| 664 | static int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) |
| 665 | { |
| 666 | return v9fs_remove(i, d, 1); |
| 667 | } |
| 668 | |
| 669 | /** |
| 670 | * v9fs_vfs_rename - VFS hook to rename an inode |
| 671 | * @old_dir: old dir inode |
| 672 | * @old_dentry: old dentry |
| 673 | * @new_dir: new dir inode |
| 674 | * @new_dentry: new dentry |
| 675 | * |
| 676 | */ |
| 677 | |
| 678 | static int |
| 679 | v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry, |
| 680 | struct inode *new_dir, struct dentry *new_dentry) |
| 681 | { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 682 | struct inode *old_inode; |
| 683 | struct v9fs_session_info *v9ses; |
| 684 | struct p9_fid *oldfid; |
| 685 | struct p9_fid *olddirfid; |
| 686 | struct p9_fid *newdirfid; |
| 687 | struct p9_wstat wstat; |
| 688 | int retval; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 689 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 690 | P9_DPRINTK(P9_DEBUG_VFS, "\n"); |
| 691 | retval = 0; |
| 692 | old_inode = old_dentry->d_inode; |
| 693 | v9ses = v9fs_inode2v9ses(old_inode); |
| 694 | oldfid = v9fs_fid_lookup(old_dentry); |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 695 | if (IS_ERR(oldfid)) |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 696 | return PTR_ERR(oldfid); |
| 697 | |
| 698 | olddirfid = v9fs_fid_clone(old_dentry->d_parent); |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 699 | if (IS_ERR(olddirfid)) { |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 700 | retval = PTR_ERR(olddirfid); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 701 | goto done; |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 702 | } |
| 703 | |
| 704 | newdirfid = v9fs_fid_clone(new_dentry->d_parent); |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 705 | if (IS_ERR(newdirfid)) { |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 706 | retval = PTR_ERR(newdirfid); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 707 | goto clunk_olddir; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 708 | } |
| 709 | |
| 710 | /* 9P can only handle file rename in the same directory */ |
| 711 | if (memcmp(&olddirfid->qid, &newdirfid->qid, sizeof(newdirfid->qid))) { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 712 | P9_DPRINTK(P9_DEBUG_ERROR, |
| 713 | "old dir and new dir are different\n"); |
Eric Van Hensbergen | 621997c | 2007-01-26 00:57:04 -0800 | [diff] [blame] | 714 | retval = -EXDEV; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 715 | goto clunk_newdir; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 716 | } |
| 717 | |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 718 | v9fs_blank_wstat(&wstat); |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 719 | wstat.muid = v9ses->uname; |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 720 | wstat.name = (char *) new_dentry->d_name.name; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 721 | retval = p9_client_wstat(oldfid, &wstat); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 722 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 723 | clunk_newdir: |
Latchesar Ionkov | 22150c4 | 2007-10-23 13:48:33 -0500 | [diff] [blame] | 724 | p9_client_clunk(newdirfid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 725 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 726 | clunk_olddir: |
Latchesar Ionkov | 22150c4 | 2007-10-23 13:48:33 -0500 | [diff] [blame] | 727 | p9_client_clunk(olddirfid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 728 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 729 | done: |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 730 | return retval; |
| 731 | } |
| 732 | |
| 733 | /** |
Adrian Bunk | 943ffb5 | 2006-01-10 00:10:13 +0100 | [diff] [blame] | 734 | * v9fs_vfs_getattr - retrieve file metadata |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 735 | * @mnt: mount information |
| 736 | * @dentry: file to get attributes on |
| 737 | * @stat: metadata structure to populate |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 738 | * |
| 739 | */ |
| 740 | |
| 741 | static int |
| 742 | v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry, |
| 743 | struct kstat *stat) |
| 744 | { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 745 | int err; |
| 746 | struct v9fs_session_info *v9ses; |
| 747 | struct p9_fid *fid; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 748 | struct p9_wstat *st; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 749 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 750 | P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry); |
| 751 | err = -EPERM; |
| 752 | v9ses = v9fs_inode2v9ses(dentry->d_inode); |
Eric Van Hensbergen | 9523a84 | 2007-07-13 13:01:27 -0500 | [diff] [blame] | 753 | if (v9ses->cache == CACHE_LOOSE) |
| 754 | return simple_getattr(mnt, dentry, stat); |
| 755 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 756 | fid = v9fs_fid_lookup(dentry); |
| 757 | if (IS_ERR(fid)) |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 758 | return PTR_ERR(fid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 759 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 760 | st = p9_client_stat(fid); |
| 761 | if (IS_ERR(st)) |
| 762 | return PTR_ERR(st); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 763 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 764 | v9fs_stat2inode(st, dentry->d_inode, dentry->d_inode->i_sb); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 765 | generic_fillattr(dentry->d_inode, stat); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 766 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 767 | kfree(st); |
| 768 | return 0; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 769 | } |
| 770 | |
| 771 | /** |
| 772 | * v9fs_vfs_setattr - set file metadata |
| 773 | * @dentry: file whose metadata to set |
| 774 | * @iattr: metadata assignment structure |
| 775 | * |
| 776 | */ |
| 777 | |
| 778 | static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr) |
| 779 | { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 780 | int retval; |
| 781 | struct v9fs_session_info *v9ses; |
| 782 | struct p9_fid *fid; |
| 783 | struct p9_wstat wstat; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 784 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 785 | P9_DPRINTK(P9_DEBUG_VFS, "\n"); |
| 786 | retval = -EPERM; |
| 787 | v9ses = v9fs_inode2v9ses(dentry->d_inode); |
| 788 | fid = v9fs_fid_lookup(dentry); |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 789 | if(IS_ERR(fid)) |
| 790 | return PTR_ERR(fid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 791 | |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 792 | v9fs_blank_wstat(&wstat); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 793 | if (iattr->ia_valid & ATTR_MODE) |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 794 | wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 795 | |
| 796 | if (iattr->ia_valid & ATTR_MTIME) |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 797 | wstat.mtime = iattr->ia_mtime.tv_sec; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 798 | |
| 799 | if (iattr->ia_valid & ATTR_ATIME) |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 800 | wstat.atime = iattr->ia_atime.tv_sec; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 801 | |
| 802 | if (iattr->ia_valid & ATTR_SIZE) |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 803 | wstat.length = iattr->ia_size; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 804 | |
Latchesar Ionkov | 2405669 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 805 | if (v9fs_extended(v9ses)) { |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 806 | if (iattr->ia_valid & ATTR_UID) |
| 807 | wstat.n_uid = iattr->ia_uid; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 808 | |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 809 | if (iattr->ia_valid & ATTR_GID) |
| 810 | wstat.n_gid = iattr->ia_gid; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 811 | } |
| 812 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 813 | retval = p9_client_wstat(fid, &wstat); |
| 814 | if (retval >= 0) |
| 815 | retval = inode_setattr(dentry->d_inode, iattr); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 816 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 817 | return retval; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 818 | } |
| 819 | |
| 820 | /** |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 821 | * v9fs_stat2inode - populate an inode structure with mistat info |
| 822 | * @stat: Plan 9 metadata (mistat) structure |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 823 | * @inode: inode to populate |
| 824 | * @sb: superblock of filesystem |
| 825 | * |
| 826 | */ |
| 827 | |
| 828 | void |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 829 | v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode, |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 830 | struct super_block *sb) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 831 | { |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 832 | char ext[32]; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 833 | struct v9fs_session_info *v9ses = sb->s_fs_info; |
| 834 | |
| 835 | inode->i_nlink = 1; |
| 836 | |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 837 | inode->i_atime.tv_sec = stat->atime; |
| 838 | inode->i_mtime.tv_sec = stat->mtime; |
| 839 | inode->i_ctime.tv_sec = stat->mtime; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 840 | |
Latchesar Ionkov | bd32b82 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 841 | inode->i_uid = v9ses->dfltuid; |
| 842 | inode->i_gid = v9ses->dfltgid; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 843 | |
Latchesar Ionkov | 2405669 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 844 | if (v9fs_extended(v9ses)) { |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 845 | inode->i_uid = stat->n_uid; |
| 846 | inode->i_gid = stat->n_gid; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 847 | } |
| 848 | |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 849 | inode->i_mode = p9mode2unixmode(v9ses, stat->mode); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 850 | if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) { |
| 851 | char type = 0; |
| 852 | int major = -1; |
| 853 | int minor = -1; |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 854 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 855 | strncpy(ext, stat->extension, sizeof(ext)); |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 856 | sscanf(ext, "%c %u %u", &type, &major, &minor); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 857 | switch (type) { |
| 858 | case 'c': |
| 859 | inode->i_mode &= ~S_IFBLK; |
| 860 | inode->i_mode |= S_IFCHR; |
| 861 | break; |
| 862 | case 'b': |
| 863 | break; |
| 864 | default: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 865 | P9_DPRINTK(P9_DEBUG_ERROR, |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 866 | "Unknown special type %c %s\n", type, |
| 867 | stat->extension); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 868 | }; |
| 869 | inode->i_rdev = MKDEV(major, minor); |
Magnus Deininger | 57c7b4e | 2008-10-17 12:44:46 -0500 | [diff] [blame] | 870 | init_special_inode(inode, inode->i_mode, inode->i_rdev); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 871 | } else |
| 872 | inode->i_rdev = 0; |
| 873 | |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 874 | inode->i_size = stat->length; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 875 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 876 | /* not real number of blocks, but 512 byte ones ... */ |
| 877 | inode->i_blocks = (inode->i_size + 512 - 1) >> 9; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 878 | } |
| 879 | |
| 880 | /** |
| 881 | * v9fs_qid2ino - convert qid into inode number |
| 882 | * @qid: qid to hash |
| 883 | * |
| 884 | * BUG: potential for inode number collisions? |
| 885 | */ |
| 886 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 887 | ino_t v9fs_qid2ino(struct p9_qid *qid) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 888 | { |
| 889 | u64 path = qid->path + 2; |
| 890 | ino_t i = 0; |
| 891 | |
| 892 | if (sizeof(ino_t) == sizeof(path)) |
| 893 | memcpy(&i, &path, sizeof(ino_t)); |
| 894 | else |
| 895 | i = (ino_t) (path ^ (path >> 32)); |
| 896 | |
| 897 | return i; |
| 898 | } |
| 899 | |
| 900 | /** |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 901 | * v9fs_readlink - read a symlink's location (internal version) |
| 902 | * @dentry: dentry for symlink |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 903 | * @buffer: buffer to load symlink location into |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 904 | * @buflen: length of buffer |
| 905 | * |
| 906 | */ |
| 907 | |
| 908 | static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen) |
| 909 | { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 910 | int retval; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 911 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 912 | struct v9fs_session_info *v9ses; |
| 913 | struct p9_fid *fid; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 914 | struct p9_wstat *st; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 915 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 916 | P9_DPRINTK(P9_DEBUG_VFS, " %s\n", dentry->d_name.name); |
| 917 | retval = -EPERM; |
| 918 | v9ses = v9fs_inode2v9ses(dentry->d_inode); |
| 919 | fid = v9fs_fid_lookup(dentry); |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 920 | if (IS_ERR(fid)) |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 921 | return PTR_ERR(fid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 922 | |
Latchesar Ionkov | 2405669 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 923 | if (!v9fs_extended(v9ses)) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 924 | return -EBADF; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 925 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 926 | st = p9_client_stat(fid); |
| 927 | if (IS_ERR(st)) |
| 928 | return PTR_ERR(st); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 929 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 930 | if (!(st->mode & P9_DMSYMLINK)) { |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 931 | retval = -EINVAL; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 932 | goto done; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 933 | } |
| 934 | |
| 935 | /* copy extension buffer into buffer */ |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 936 | strncpy(buffer, st->extension, buflen); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 937 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 938 | P9_DPRINTK(P9_DEBUG_VFS, |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 939 | "%s -> %s (%s)\n", dentry->d_name.name, st->extension, buffer); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 940 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 941 | retval = buflen; |
| 942 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 943 | done: |
| 944 | kfree(st); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 945 | return retval; |
| 946 | } |
| 947 | |
| 948 | /** |
| 949 | * v9fs_vfs_readlink - read a symlink's location |
| 950 | * @dentry: dentry for symlink |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 951 | * @buffer: buffer to load symlink location into |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 952 | * @buflen: length of buffer |
| 953 | * |
| 954 | */ |
| 955 | |
| 956 | static int v9fs_vfs_readlink(struct dentry *dentry, char __user * buffer, |
| 957 | int buflen) |
| 958 | { |
| 959 | int retval; |
| 960 | int ret; |
| 961 | char *link = __getname(); |
| 962 | |
Florin Malita | 0710d36 | 2006-06-25 05:48:31 -0700 | [diff] [blame] | 963 | if (unlikely(!link)) |
| 964 | return -ENOMEM; |
| 965 | |
Latchesar Ionkov | a1f9d8d | 2005-09-22 21:43:52 -0700 | [diff] [blame] | 966 | if (buflen > PATH_MAX) |
| 967 | buflen = PATH_MAX; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 968 | |
Wu Fengguang | 7dd0cdc | 2008-12-19 16:47:40 -0600 | [diff] [blame] | 969 | P9_DPRINTK(P9_DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_name.name, |
| 970 | dentry); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 971 | |
| 972 | retval = v9fs_readlink(dentry, link, buflen); |
| 973 | |
| 974 | if (retval > 0) { |
| 975 | if ((ret = copy_to_user(buffer, link, retval)) != 0) { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 976 | P9_DPRINTK(P9_DEBUG_ERROR, |
| 977 | "problem copying to user: %d\n", ret); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 978 | retval = ret; |
| 979 | } |
| 980 | } |
| 981 | |
Davi Arnaut | ce44eeb | 2005-11-07 00:59:36 -0800 | [diff] [blame] | 982 | __putname(link); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 983 | return retval; |
| 984 | } |
| 985 | |
| 986 | /** |
| 987 | * v9fs_vfs_follow_link - follow a symlink path |
| 988 | * @dentry: dentry for symlink |
| 989 | * @nd: nameidata |
| 990 | * |
| 991 | */ |
| 992 | |
| 993 | static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd) |
| 994 | { |
| 995 | int len = 0; |
| 996 | char *link = __getname(); |
| 997 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 998 | P9_DPRINTK(P9_DEBUG_VFS, "%s n", dentry->d_name.name); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 999 | |
| 1000 | if (!link) |
| 1001 | link = ERR_PTR(-ENOMEM); |
| 1002 | else { |
Latchesar Ionkov | 16cce6d | 2006-03-25 03:07:26 -0800 | [diff] [blame] | 1003 | len = v9fs_readlink(dentry, link, PATH_MAX); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1004 | |
| 1005 | if (len < 0) { |
Davi Arnaut | ce44eeb | 2005-11-07 00:59:36 -0800 | [diff] [blame] | 1006 | __putname(link); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1007 | link = ERR_PTR(len); |
| 1008 | } else |
| 1009 | link[len] = 0; |
| 1010 | } |
| 1011 | nd_set_link(nd, link); |
| 1012 | |
| 1013 | return NULL; |
| 1014 | } |
| 1015 | |
| 1016 | /** |
| 1017 | * v9fs_vfs_put_link - release a symlink path |
| 1018 | * @dentry: dentry for symlink |
| 1019 | * @nd: nameidata |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 1020 | * @p: unused |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1021 | * |
| 1022 | */ |
| 1023 | |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 1024 | static void |
| 1025 | 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] | 1026 | { |
| 1027 | char *s = nd_get_link(nd); |
| 1028 | |
Duane Griffin | 6ff2320 | 2008-12-19 16:45:21 -0600 | [diff] [blame] | 1029 | P9_DPRINTK(P9_DEBUG_VFS, " %s %s\n", dentry->d_name.name, |
| 1030 | IS_ERR(s) ? "<error>" : s); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1031 | if (!IS_ERR(s)) |
Davi Arnaut | ce44eeb | 2005-11-07 00:59:36 -0800 | [diff] [blame] | 1032 | __putname(s); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1033 | } |
| 1034 | |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 1035 | /** |
| 1036 | * v9fs_vfs_mkspecial - create a special file |
| 1037 | * @dir: inode to create special file in |
| 1038 | * @dentry: dentry to create |
| 1039 | * @mode: mode to create special file |
| 1040 | * @extension: 9p2000.u format extension string representing special file |
| 1041 | * |
| 1042 | */ |
| 1043 | |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1044 | static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, |
| 1045 | int mode, const char *extension) |
| 1046 | { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1047 | u32 perm; |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1048 | struct v9fs_session_info *v9ses; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1049 | struct p9_fid *fid; |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1050 | |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 1051 | v9ses = v9fs_inode2v9ses(dir); |
Latchesar Ionkov | 2405669 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 1052 | if (!v9fs_extended(v9ses)) { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1053 | P9_DPRINTK(P9_DEBUG_ERROR, "not extended\n"); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 1054 | return -EPERM; |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1055 | } |
| 1056 | |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 1057 | perm = unixmode2p9mode(v9ses, mode); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1058 | fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm, |
| 1059 | P9_OREAD); |
| 1060 | if (IS_ERR(fid)) |
| 1061 | return PTR_ERR(fid); |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 1062 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1063 | p9_client_clunk(fid); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 1064 | return 0; |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1065 | } |
| 1066 | |
| 1067 | /** |
| 1068 | * v9fs_vfs_symlink - helper function to create symlinks |
| 1069 | * @dir: directory inode containing symlink |
| 1070 | * @dentry: dentry for symlink |
| 1071 | * @symname: symlink data |
| 1072 | * |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 1073 | * See Also: 9P2000.u RFC for more information |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1074 | * |
| 1075 | */ |
| 1076 | |
| 1077 | static int |
| 1078 | v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname) |
| 1079 | { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1080 | P9_DPRINTK(P9_DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino, |
| 1081 | dentry->d_name.name, symname); |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1082 | |
| 1083 | return v9fs_vfs_mkspecial(dir, dentry, S_IFLNK, symname); |
| 1084 | } |
| 1085 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1086 | /** |
| 1087 | * v9fs_vfs_link - create a hardlink |
| 1088 | * @old_dentry: dentry for file to link to |
| 1089 | * @dir: inode destination for new link |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 1090 | * @dentry: dentry for link |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1091 | * |
| 1092 | */ |
| 1093 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1094 | static int |
| 1095 | v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, |
| 1096 | struct dentry *dentry) |
| 1097 | { |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1098 | int retval; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1099 | struct p9_fid *oldfid; |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1100 | char *name; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1101 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1102 | P9_DPRINTK(P9_DEBUG_VFS, |
| 1103 | " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name, |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1104 | old_dentry->d_name.name); |
| 1105 | |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 1106 | oldfid = v9fs_fid_clone(old_dentry); |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 1107 | if (IS_ERR(oldfid)) |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 1108 | return PTR_ERR(oldfid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1109 | |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1110 | name = __getname(); |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 1111 | if (unlikely(!name)) { |
| 1112 | retval = -ENOMEM; |
| 1113 | goto clunk_fid; |
| 1114 | } |
Florin Malita | 0710d36 | 2006-06-25 05:48:31 -0700 | [diff] [blame] | 1115 | |
Latchesar Ionkov | 16cce6d | 2006-03-25 03:07:26 -0800 | [diff] [blame] | 1116 | sprintf(name, "%d\n", oldfid->fid); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1117 | retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name); |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1118 | __putname(name); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1119 | |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 1120 | clunk_fid: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1121 | p9_client_clunk(oldfid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1122 | return retval; |
| 1123 | } |
| 1124 | |
| 1125 | /** |
| 1126 | * v9fs_vfs_mknod - create a special file |
| 1127 | * @dir: inode destination for new link |
| 1128 | * @dentry: dentry for file |
| 1129 | * @mode: mode for creation |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 1130 | * @rdev: device associated with special file |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1131 | * |
| 1132 | */ |
| 1133 | |
| 1134 | static int |
| 1135 | v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev) |
| 1136 | { |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1137 | int retval; |
| 1138 | char *name; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1139 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1140 | P9_DPRINTK(P9_DEBUG_VFS, |
| 1141 | " %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] | 1142 | dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev)); |
| 1143 | |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1144 | if (!new_valid_dev(rdev)) |
| 1145 | return -EINVAL; |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 1146 | |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1147 | name = __getname(); |
Eugene Teo | c0291a0 | 2006-03-25 03:07:27 -0800 | [diff] [blame] | 1148 | if (!name) |
| 1149 | return -ENOMEM; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1150 | /* build extension */ |
| 1151 | if (S_ISBLK(mode)) |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1152 | sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev)); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1153 | else if (S_ISCHR(mode)) |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1154 | sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev)); |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 1155 | else if (S_ISFIFO(mode)) |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1156 | *name = 0; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1157 | else { |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1158 | __putname(name); |
| 1159 | return -EINVAL; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1160 | } |
| 1161 | |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1162 | retval = v9fs_vfs_mkspecial(dir, dentry, mode, name); |
| 1163 | __putname(name); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1164 | |
| 1165 | return retval; |
| 1166 | } |
| 1167 | |
Arjan van de Ven | 754661f | 2007-02-12 00:55:38 -0800 | [diff] [blame] | 1168 | static const struct inode_operations v9fs_dir_inode_operations_ext = { |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1169 | .create = v9fs_vfs_create, |
| 1170 | .lookup = v9fs_vfs_lookup, |
| 1171 | .symlink = v9fs_vfs_symlink, |
| 1172 | .link = v9fs_vfs_link, |
| 1173 | .unlink = v9fs_vfs_unlink, |
| 1174 | .mkdir = v9fs_vfs_mkdir, |
| 1175 | .rmdir = v9fs_vfs_rmdir, |
| 1176 | .mknod = v9fs_vfs_mknod, |
| 1177 | .rename = v9fs_vfs_rename, |
| 1178 | .readlink = v9fs_vfs_readlink, |
| 1179 | .getattr = v9fs_vfs_getattr, |
| 1180 | .setattr = v9fs_vfs_setattr, |
| 1181 | }; |
| 1182 | |
Arjan van de Ven | 754661f | 2007-02-12 00:55:38 -0800 | [diff] [blame] | 1183 | static const struct inode_operations v9fs_dir_inode_operations = { |
Eric Van Hensbergen | b501611 | 2005-09-09 13:04:27 -0700 | [diff] [blame] | 1184 | .create = v9fs_vfs_create, |
| 1185 | .lookup = v9fs_vfs_lookup, |
| 1186 | .unlink = v9fs_vfs_unlink, |
| 1187 | .mkdir = v9fs_vfs_mkdir, |
| 1188 | .rmdir = v9fs_vfs_rmdir, |
| 1189 | .mknod = v9fs_vfs_mknod, |
| 1190 | .rename = v9fs_vfs_rename, |
| 1191 | .getattr = v9fs_vfs_getattr, |
| 1192 | .setattr = v9fs_vfs_setattr, |
| 1193 | }; |
| 1194 | |
Arjan van de Ven | 754661f | 2007-02-12 00:55:38 -0800 | [diff] [blame] | 1195 | static const struct inode_operations v9fs_file_inode_operations = { |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1196 | .getattr = v9fs_vfs_getattr, |
| 1197 | .setattr = v9fs_vfs_setattr, |
| 1198 | }; |
| 1199 | |
Arjan van de Ven | 754661f | 2007-02-12 00:55:38 -0800 | [diff] [blame] | 1200 | static const struct inode_operations v9fs_symlink_inode_operations = { |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1201 | .readlink = v9fs_vfs_readlink, |
| 1202 | .follow_link = v9fs_vfs_follow_link, |
| 1203 | .put_link = v9fs_vfs_put_link, |
| 1204 | .getattr = v9fs_vfs_getattr, |
| 1205 | .setattr = v9fs_vfs_setattr, |
| 1206 | }; |