Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/fs/9p/vfs_inode.c |
| 3 | * |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 4 | * This file contains vfs inode ops for the 9P2000 protocol. |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 5 | * |
| 6 | * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com> |
| 7 | * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov> |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
Eric Van Hensbergen | 42e8c50 | 2006-03-25 03:07:28 -0800 | [diff] [blame] | 10 | * it under the terms of the GNU General Public License version 2 |
| 11 | * as published by the Free Software Foundation. |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with this program; if not, write to: |
| 20 | * Free Software Foundation |
| 21 | * 51 Franklin Street, Fifth Floor |
| 22 | * Boston, MA 02111-1301 USA |
| 23 | * |
| 24 | */ |
| 25 | |
| 26 | #include <linux/module.h> |
| 27 | #include <linux/errno.h> |
| 28 | #include <linux/fs.h> |
| 29 | #include <linux/file.h> |
| 30 | #include <linux/pagemap.h> |
| 31 | #include <linux/stat.h> |
| 32 | #include <linux/string.h> |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 33 | #include <linux/inet.h> |
| 34 | #include <linux/namei.h> |
| 35 | #include <linux/idr.h> |
Alexey Dobriyan | e8edc6e | 2007-05-21 01:22:52 +0400 | [diff] [blame] | 36 | #include <linux/sched.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 37 | #include <linux/slab.h> |
Aneesh Kumar K.V | ebf4626 | 2010-05-31 13:22:56 +0530 | [diff] [blame] | 38 | #include <linux/xattr.h> |
Aneesh Kumar K.V | 85ff872 | 2010-09-28 00:27:39 +0530 | [diff] [blame] | 39 | #include <linux/posix_acl.h> |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 40 | #include <net/9p/9p.h> |
| 41 | #include <net/9p/client.h> |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 42 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 43 | #include "v9fs.h" |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 44 | #include "v9fs_vfs.h" |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 45 | #include "fid.h" |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 46 | #include "cache.h" |
Aneesh Kumar K.V | ebf4626 | 2010-05-31 13:22:56 +0530 | [diff] [blame] | 47 | #include "xattr.h" |
Aneesh Kumar K.V | 85ff872 | 2010-09-28 00:27:39 +0530 | [diff] [blame] | 48 | #include "acl.h" |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 49 | |
Arjan van de Ven | 754661f | 2007-02-12 00:55:38 -0800 | [diff] [blame] | 50 | static const struct inode_operations v9fs_dir_inode_operations; |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 51 | static const struct inode_operations v9fs_dir_inode_operations_dotu; |
Arjan van de Ven | 754661f | 2007-02-12 00:55:38 -0800 | [diff] [blame] | 52 | static const struct inode_operations v9fs_file_inode_operations; |
| 53 | static const struct inode_operations v9fs_symlink_inode_operations; |
Aneesh Kumar K.V | f5fc614 | 2010-10-12 13:02:25 +0530 | [diff] [blame] | 54 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 55 | /** |
| 56 | * unixmode2p9mode - convert unix mode bits to plan 9 |
| 57 | * @v9ses: v9fs session information |
| 58 | * @mode: mode to convert |
| 59 | * |
| 60 | */ |
| 61 | |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 62 | static int unixmode2p9mode(struct v9fs_session_info *v9ses, int mode) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 63 | { |
| 64 | int res; |
| 65 | res = mode & 0777; |
| 66 | if (S_ISDIR(mode)) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 67 | res |= P9_DMDIR; |
Sripathi Kodi | dd6102f | 2010-03-05 18:48:00 +0000 | [diff] [blame] | 68 | if (v9fs_proto_dotu(v9ses)) { |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 69 | if (S_ISLNK(mode)) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 70 | res |= P9_DMSYMLINK; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 71 | if (v9ses->nodev == 0) { |
| 72 | if (S_ISSOCK(mode)) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 73 | res |= P9_DMSOCKET; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 74 | if (S_ISFIFO(mode)) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 75 | res |= P9_DMNAMEDPIPE; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 76 | if (S_ISBLK(mode)) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 77 | res |= P9_DMDEVICE; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 78 | if (S_ISCHR(mode)) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 79 | res |= P9_DMDEVICE; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 80 | } |
| 81 | |
| 82 | if ((mode & S_ISUID) == S_ISUID) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 83 | res |= P9_DMSETUID; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 84 | if ((mode & S_ISGID) == S_ISGID) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 85 | res |= P9_DMSETGID; |
Anthony Liguori | d199d65 | 2008-02-06 19:25:06 -0600 | [diff] [blame] | 86 | if ((mode & S_ISVTX) == S_ISVTX) |
| 87 | res |= P9_DMSETVTX; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 88 | if ((mode & P9_DMLINK)) |
| 89 | res |= P9_DMLINK; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 90 | } |
| 91 | |
| 92 | return res; |
| 93 | } |
| 94 | |
| 95 | /** |
| 96 | * p9mode2unixmode- convert plan9 mode bits to unix mode bits |
| 97 | * @v9ses: v9fs session information |
Aneesh Kumar K.V | 4508914 | 2011-07-25 18:06:33 +0000 | [diff] [blame] | 98 | * @stat: p9_wstat from which mode need to be derived |
| 99 | * @rdev: major number, minor number in case of device files. |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 100 | * |
| 101 | */ |
Aneesh Kumar K.V | 4508914 | 2011-07-25 18:06:33 +0000 | [diff] [blame] | 102 | static int p9mode2unixmode(struct v9fs_session_info *v9ses, |
| 103 | struct p9_wstat *stat, dev_t *rdev) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 104 | { |
| 105 | int res; |
Aneesh Kumar K.V | 4508914 | 2011-07-25 18:06:33 +0000 | [diff] [blame] | 106 | int mode = stat->mode; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 107 | |
Aneesh Kumar K.V | 4508914 | 2011-07-25 18:06:33 +0000 | [diff] [blame] | 108 | res = mode & S_IALLUGO; |
| 109 | *rdev = 0; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 110 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 111 | if ((mode & P9_DMDIR) == P9_DMDIR) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 112 | res |= S_IFDIR; |
Sripathi Kodi | dd6102f | 2010-03-05 18:48:00 +0000 | [diff] [blame] | 113 | else if ((mode & P9_DMSYMLINK) && (v9fs_proto_dotu(v9ses))) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 114 | res |= S_IFLNK; |
Sripathi Kodi | dd6102f | 2010-03-05 18:48:00 +0000 | [diff] [blame] | 115 | else if ((mode & P9_DMSOCKET) && (v9fs_proto_dotu(v9ses)) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 116 | && (v9ses->nodev == 0)) |
| 117 | res |= S_IFSOCK; |
Sripathi Kodi | dd6102f | 2010-03-05 18:48:00 +0000 | [diff] [blame] | 118 | else if ((mode & P9_DMNAMEDPIPE) && (v9fs_proto_dotu(v9ses)) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 119 | && (v9ses->nodev == 0)) |
| 120 | res |= S_IFIFO; |
Sripathi Kodi | dd6102f | 2010-03-05 18:48:00 +0000 | [diff] [blame] | 121 | else if ((mode & P9_DMDEVICE) && (v9fs_proto_dotu(v9ses)) |
Aneesh Kumar K.V | 4508914 | 2011-07-25 18:06:33 +0000 | [diff] [blame] | 122 | && (v9ses->nodev == 0)) { |
| 123 | char type = 0, ext[32]; |
| 124 | int major = -1, minor = -1; |
| 125 | |
| 126 | strncpy(ext, stat->extension, sizeof(ext)); |
| 127 | sscanf(ext, "%c %u %u", &type, &major, &minor); |
| 128 | switch (type) { |
| 129 | case 'c': |
| 130 | res |= S_IFCHR; |
| 131 | break; |
| 132 | case 'b': |
| 133 | res |= S_IFBLK; |
| 134 | break; |
| 135 | default: |
| 136 | P9_DPRINTK(P9_DEBUG_ERROR, |
| 137 | "Unknown special type %c %s\n", type, |
| 138 | stat->extension); |
| 139 | }; |
| 140 | *rdev = MKDEV(major, minor); |
| 141 | } else |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 142 | res |= S_IFREG; |
| 143 | |
Sripathi Kodi | dd6102f | 2010-03-05 18:48:00 +0000 | [diff] [blame] | 144 | if (v9fs_proto_dotu(v9ses)) { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 145 | if ((mode & P9_DMSETUID) == P9_DMSETUID) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 146 | res |= S_ISUID; |
| 147 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 148 | if ((mode & P9_DMSETGID) == P9_DMSETGID) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 149 | res |= S_ISGID; |
Anthony Liguori | d199d65 | 2008-02-06 19:25:06 -0600 | [diff] [blame] | 150 | |
| 151 | if ((mode & P9_DMSETVTX) == P9_DMSETVTX) |
| 152 | res |= S_ISVTX; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 153 | } |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 154 | return res; |
| 155 | } |
| 156 | |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 157 | /** |
| 158 | * v9fs_uflags2omode- convert posix open flags to plan 9 mode bits |
| 159 | * @uflags: flags to convert |
Eric Van Hensbergen | 2e4bef4 | 2008-06-24 17:39:39 -0500 | [diff] [blame] | 160 | * @extended: if .u extensions are active |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 161 | */ |
| 162 | |
Eric Van Hensbergen | 2e4bef4 | 2008-06-24 17:39:39 -0500 | [diff] [blame] | 163 | int v9fs_uflags2omode(int uflags, int extended) |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 164 | { |
| 165 | int ret; |
| 166 | |
| 167 | ret = 0; |
| 168 | switch (uflags&3) { |
| 169 | default: |
| 170 | case O_RDONLY: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 171 | ret = P9_OREAD; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 172 | break; |
| 173 | |
| 174 | case O_WRONLY: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 175 | ret = P9_OWRITE; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 176 | break; |
| 177 | |
| 178 | case O_RDWR: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 179 | ret = P9_ORDWR; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 180 | break; |
| 181 | } |
| 182 | |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 183 | if (uflags & O_TRUNC) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 184 | ret |= P9_OTRUNC; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 185 | |
Eric Van Hensbergen | 2e4bef4 | 2008-06-24 17:39:39 -0500 | [diff] [blame] | 186 | if (extended) { |
| 187 | if (uflags & O_EXCL) |
| 188 | ret |= P9_OEXCL; |
| 189 | |
| 190 | if (uflags & O_APPEND) |
| 191 | ret |= P9_OAPPEND; |
| 192 | } |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 193 | |
| 194 | return ret; |
| 195 | } |
| 196 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 197 | /** |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 198 | * v9fs_blank_wstat - helper function to setup a 9P stat structure |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 199 | * @wstat: structure to initialize |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 200 | * |
| 201 | */ |
| 202 | |
M. Mohan Kumar | 7a4439c | 2010-02-08 15:36:48 -0600 | [diff] [blame] | 203 | void |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 204 | v9fs_blank_wstat(struct p9_wstat *wstat) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 205 | { |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 206 | wstat->type = ~0; |
| 207 | wstat->dev = ~0; |
| 208 | wstat->qid.type = ~0; |
| 209 | wstat->qid.version = ~0; |
| 210 | *((long long *)&wstat->qid.path) = ~0; |
| 211 | wstat->mode = ~0; |
| 212 | wstat->atime = ~0; |
| 213 | wstat->mtime = ~0; |
| 214 | wstat->length = ~0; |
| 215 | wstat->name = NULL; |
| 216 | wstat->uid = NULL; |
| 217 | wstat->gid = NULL; |
| 218 | wstat->muid = NULL; |
| 219 | wstat->n_uid = ~0; |
| 220 | wstat->n_gid = ~0; |
| 221 | wstat->n_muid = ~0; |
| 222 | wstat->extension = NULL; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 223 | } |
| 224 | |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 225 | /** |
| 226 | * v9fs_alloc_inode - helper function to allocate an inode |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 227 | * |
| 228 | */ |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 229 | struct inode *v9fs_alloc_inode(struct super_block *sb) |
| 230 | { |
Aneesh Kumar K.V | a78ce05 | 2011-02-28 17:04:02 +0530 | [diff] [blame] | 231 | struct v9fs_inode *v9inode; |
| 232 | v9inode = (struct v9fs_inode *)kmem_cache_alloc(v9fs_inode_cache, |
| 233 | GFP_KERNEL); |
| 234 | if (!v9inode) |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 235 | return NULL; |
Aneesh Kumar K.V | a78ce05 | 2011-02-28 17:04:02 +0530 | [diff] [blame] | 236 | #ifdef CONFIG_9P_FSCACHE |
| 237 | v9inode->fscache = NULL; |
Aneesh Kumar K.V | a78ce05 | 2011-02-28 17:04:02 +0530 | [diff] [blame] | 238 | spin_lock_init(&v9inode->fscache_lock); |
| 239 | #endif |
Aneesh Kumar K.V | 6b39f6d | 2011-02-28 17:04:03 +0530 | [diff] [blame] | 240 | v9inode->writeback_fid = NULL; |
Aneesh Kumar K.V | b3cbea0 | 2011-02-28 17:04:06 +0530 | [diff] [blame] | 241 | v9inode->cache_validity = 0; |
Aneesh Kumar K.V | 5a7e0a8 | 2011-03-08 16:39:46 +0530 | [diff] [blame] | 242 | mutex_init(&v9inode->v_mutex); |
Aneesh Kumar K.V | a78ce05 | 2011-02-28 17:04:02 +0530 | [diff] [blame] | 243 | return &v9inode->vfs_inode; |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 244 | } |
| 245 | |
| 246 | /** |
| 247 | * v9fs_destroy_inode - destroy an inode |
| 248 | * |
| 249 | */ |
| 250 | |
Nick Piggin | fa0d7e3d | 2011-01-07 17:49:49 +1100 | [diff] [blame] | 251 | static void v9fs_i_callback(struct rcu_head *head) |
| 252 | { |
| 253 | struct inode *inode = container_of(head, struct inode, i_rcu); |
| 254 | INIT_LIST_HEAD(&inode->i_dentry); |
Aneesh Kumar K.V | a78ce05 | 2011-02-28 17:04:02 +0530 | [diff] [blame] | 255 | kmem_cache_free(v9fs_inode_cache, V9FS_I(inode)); |
Nick Piggin | fa0d7e3d | 2011-01-07 17:49:49 +1100 | [diff] [blame] | 256 | } |
| 257 | |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 258 | void v9fs_destroy_inode(struct inode *inode) |
| 259 | { |
Nick Piggin | fa0d7e3d | 2011-01-07 17:49:49 +1100 | [diff] [blame] | 260 | call_rcu(&inode->i_rcu, v9fs_i_callback); |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 261 | } |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 262 | |
Aneesh Kumar K.V | 5ffc0cb | 2011-02-28 17:04:01 +0530 | [diff] [blame] | 263 | int v9fs_init_inode(struct v9fs_session_info *v9ses, |
Aneesh Kumar K.V | 4508914 | 2011-07-25 18:06:33 +0000 | [diff] [blame] | 264 | struct inode *inode, int mode, dev_t rdev) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 265 | { |
Aneesh Kumar K.V | 5ffc0cb | 2011-02-28 17:04:01 +0530 | [diff] [blame] | 266 | int err = 0; |
Abhishek Kulkarni | 2bb5411 | 2009-07-19 13:41:56 -0600 | [diff] [blame] | 267 | |
Dmitry Monakhov | 217f206 | 2010-03-04 17:30:57 +0300 | [diff] [blame] | 268 | inode_init_owner(inode, NULL, mode); |
Abhishek Kulkarni | 2bb5411 | 2009-07-19 13:41:56 -0600 | [diff] [blame] | 269 | inode->i_blocks = 0; |
Aneesh Kumar K.V | 4508914 | 2011-07-25 18:06:33 +0000 | [diff] [blame] | 270 | inode->i_rdev = rdev; |
Abhishek Kulkarni | 2bb5411 | 2009-07-19 13:41:56 -0600 | [diff] [blame] | 271 | inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; |
| 272 | inode->i_mapping->a_ops = &v9fs_addr_operations; |
| 273 | |
| 274 | switch (mode & S_IFMT) { |
| 275 | case S_IFIFO: |
| 276 | case S_IFBLK: |
| 277 | case S_IFCHR: |
| 278 | case S_IFSOCK: |
M. Mohan Kumar | 4b43516 | 2010-06-16 14:27:01 +0530 | [diff] [blame] | 279 | if (v9fs_proto_dotl(v9ses)) { |
| 280 | inode->i_op = &v9fs_file_inode_operations_dotl; |
M. Mohan Kumar | 4b43516 | 2010-06-16 14:27:01 +0530 | [diff] [blame] | 281 | } else if (v9fs_proto_dotu(v9ses)) { |
| 282 | inode->i_op = &v9fs_file_inode_operations; |
M. Mohan Kumar | 4b43516 | 2010-06-16 14:27:01 +0530 | [diff] [blame] | 283 | } else { |
Abhishek Kulkarni | 2bb5411 | 2009-07-19 13:41:56 -0600 | [diff] [blame] | 284 | P9_DPRINTK(P9_DEBUG_ERROR, |
| 285 | "special files without extended mode\n"); |
| 286 | err = -EINVAL; |
| 287 | goto error; |
| 288 | } |
| 289 | init_special_inode(inode, inode->i_mode, inode->i_rdev); |
| 290 | break; |
| 291 | case S_IFREG: |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 292 | if (v9fs_proto_dotl(v9ses)) { |
| 293 | inode->i_op = &v9fs_file_inode_operations_dotl; |
Aneesh Kumar K.V | 29236f4 | 2011-02-28 17:03:54 +0530 | [diff] [blame] | 294 | if (v9ses->cache) |
| 295 | inode->i_fop = |
| 296 | &v9fs_cached_file_operations_dotl; |
| 297 | else |
| 298 | inode->i_fop = &v9fs_file_operations_dotl; |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 299 | } else { |
| 300 | inode->i_op = &v9fs_file_inode_operations; |
Aneesh Kumar K.V | 29236f4 | 2011-02-28 17:03:54 +0530 | [diff] [blame] | 301 | if (v9ses->cache) |
| 302 | inode->i_fop = &v9fs_cached_file_operations; |
| 303 | else |
| 304 | inode->i_fop = &v9fs_file_operations; |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 305 | } |
| 306 | |
Abhishek Kulkarni | 2bb5411 | 2009-07-19 13:41:56 -0600 | [diff] [blame] | 307 | break; |
| 308 | case S_IFLNK: |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 309 | if (!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses)) { |
| 310 | P9_DPRINTK(P9_DEBUG_ERROR, "extended modes used with " |
| 311 | "legacy protocol.\n"); |
Abhishek Kulkarni | 2bb5411 | 2009-07-19 13:41:56 -0600 | [diff] [blame] | 312 | err = -EINVAL; |
| 313 | goto error; |
| 314 | } |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 315 | |
| 316 | if (v9fs_proto_dotl(v9ses)) |
| 317 | inode->i_op = &v9fs_symlink_inode_operations_dotl; |
| 318 | else |
| 319 | inode->i_op = &v9fs_symlink_inode_operations; |
| 320 | |
Abhishek Kulkarni | 2bb5411 | 2009-07-19 13:41:56 -0600 | [diff] [blame] | 321 | break; |
| 322 | case S_IFDIR: |
| 323 | inc_nlink(inode); |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 324 | if (v9fs_proto_dotl(v9ses)) |
| 325 | inode->i_op = &v9fs_dir_inode_operations_dotl; |
| 326 | else if (v9fs_proto_dotu(v9ses)) |
| 327 | inode->i_op = &v9fs_dir_inode_operations_dotu; |
Abhishek Kulkarni | 2bb5411 | 2009-07-19 13:41:56 -0600 | [diff] [blame] | 328 | else |
| 329 | inode->i_op = &v9fs_dir_inode_operations; |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 330 | |
| 331 | if (v9fs_proto_dotl(v9ses)) |
| 332 | inode->i_fop = &v9fs_dir_operations_dotl; |
| 333 | else |
| 334 | inode->i_fop = &v9fs_dir_operations; |
| 335 | |
Abhishek Kulkarni | 2bb5411 | 2009-07-19 13:41:56 -0600 | [diff] [blame] | 336 | break; |
| 337 | default: |
| 338 | P9_DPRINTK(P9_DEBUG_ERROR, "BAD mode 0x%x S_IFMT 0x%x\n", |
| 339 | mode, mode & S_IFMT); |
| 340 | err = -EINVAL; |
| 341 | goto error; |
| 342 | } |
Abhishek Kulkarni | 2bb5411 | 2009-07-19 13:41:56 -0600 | [diff] [blame] | 343 | error: |
Aneesh Kumar K.V | 5ffc0cb | 2011-02-28 17:04:01 +0530 | [diff] [blame] | 344 | return err; |
| 345 | |
| 346 | } |
| 347 | |
| 348 | /** |
| 349 | * v9fs_get_inode - helper function to setup an inode |
| 350 | * @sb: superblock |
| 351 | * @mode: mode to setup inode with |
| 352 | * |
| 353 | */ |
| 354 | |
Aneesh Kumar K.V | 4508914 | 2011-07-25 18:06:33 +0000 | [diff] [blame] | 355 | struct inode *v9fs_get_inode(struct super_block *sb, int mode, dev_t rdev) |
Aneesh Kumar K.V | 5ffc0cb | 2011-02-28 17:04:01 +0530 | [diff] [blame] | 356 | { |
| 357 | int err; |
| 358 | struct inode *inode; |
| 359 | struct v9fs_session_info *v9ses = sb->s_fs_info; |
| 360 | |
| 361 | P9_DPRINTK(P9_DEBUG_VFS, "super block: %p mode: %o\n", sb, mode); |
| 362 | |
| 363 | inode = new_inode(sb); |
| 364 | if (!inode) { |
| 365 | P9_EPRINTK(KERN_WARNING, "Problem allocating inode\n"); |
| 366 | return ERR_PTR(-ENOMEM); |
| 367 | } |
Aneesh Kumar K.V | 4508914 | 2011-07-25 18:06:33 +0000 | [diff] [blame] | 368 | err = v9fs_init_inode(v9ses, inode, mode, rdev); |
Aneesh Kumar K.V | 5ffc0cb | 2011-02-28 17:04:01 +0530 | [diff] [blame] | 369 | if (err) { |
| 370 | iput(inode); |
| 371 | return ERR_PTR(err); |
| 372 | } |
| 373 | return inode; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 374 | } |
| 375 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 376 | /* |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 377 | static struct v9fs_fid* |
| 378 | v9fs_clone_walk(struct v9fs_session_info *v9ses, u32 fid, struct dentry *dentry) |
| 379 | { |
| 380 | int err; |
Mika Kukkonen | 736c4b8 | 2006-12-06 20:36:29 -0800 | [diff] [blame] | 381 | int nfid; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 382 | struct v9fs_fid *ret; |
| 383 | struct v9fs_fcall *fcall; |
| 384 | |
| 385 | nfid = v9fs_get_idpool(&v9ses->fidpool); |
| 386 | if (nfid < 0) { |
| 387 | eprintk(KERN_WARNING, "no free fids available\n"); |
Latchesar Ionkov | 731805b | 2006-03-07 21:55:42 -0800 | [diff] [blame] | 388 | return ERR_PTR(-ENOSPC); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 389 | } |
| 390 | |
| 391 | err = v9fs_t_walk(v9ses, fid, nfid, (char *) dentry->d_name.name, |
| 392 | &fcall); |
| 393 | |
| 394 | if (err < 0) { |
Latchesar Ionkov | 41e5a6a | 2006-05-15 09:44:21 -0700 | [diff] [blame] | 395 | if (fcall && fcall->id == RWALK) |
| 396 | goto clunk_fid; |
| 397 | |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 398 | PRINT_FCALL_ERROR("walk error", fcall); |
| 399 | v9fs_put_idpool(nfid, &v9ses->fidpool); |
| 400 | goto error; |
| 401 | } |
| 402 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 403 | kfree(fcall); |
Latchesar Ionkov | 3cf6429 | 2006-01-08 01:04:58 -0800 | [diff] [blame] | 404 | fcall = NULL; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 405 | ret = v9fs_fid_create(v9ses, nfid); |
| 406 | if (!ret) { |
| 407 | err = -ENOMEM; |
| 408 | goto clunk_fid; |
| 409 | } |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 410 | |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 411 | err = v9fs_fid_insert(ret, dentry); |
| 412 | if (err < 0) { |
| 413 | v9fs_fid_destroy(ret); |
| 414 | goto clunk_fid; |
Latchesar Ionkov | 0b8dd17 | 2005-09-27 21:45:24 -0700 | [diff] [blame] | 415 | } |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 416 | |
| 417 | return ret; |
| 418 | |
| 419 | clunk_fid: |
| 420 | v9fs_t_clunk(v9ses, nfid); |
| 421 | |
| 422 | error: |
| 423 | kfree(fcall); |
| 424 | return ERR_PTR(err); |
| 425 | } |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 426 | */ |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 427 | |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 428 | |
| 429 | /** |
| 430 | * v9fs_clear_inode - release an inode |
| 431 | * @inode: inode to release |
| 432 | * |
| 433 | */ |
Al Viro | b57922d | 2010-06-07 14:34:48 -0400 | [diff] [blame] | 434 | void v9fs_evict_inode(struct inode *inode) |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 435 | { |
Aneesh Kumar K.V | 6b39f6d | 2011-02-28 17:04:03 +0530 | [diff] [blame] | 436 | struct v9fs_inode *v9inode = V9FS_I(inode); |
| 437 | |
Al Viro | b57922d | 2010-06-07 14:34:48 -0400 | [diff] [blame] | 438 | truncate_inode_pages(inode->i_mapping, 0); |
| 439 | end_writeback(inode); |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 440 | filemap_fdatawrite(inode->i_mapping); |
| 441 | |
| 442 | #ifdef CONFIG_9P_FSCACHE |
| 443 | v9fs_cache_inode_put_cookie(inode); |
| 444 | #endif |
Aneesh Kumar K.V | 6b39f6d | 2011-02-28 17:04:03 +0530 | [diff] [blame] | 445 | /* clunk the fid stashed in writeback_fid */ |
| 446 | if (v9inode->writeback_fid) { |
| 447 | p9_client_clunk(v9inode->writeback_fid); |
| 448 | v9inode->writeback_fid = NULL; |
Aneesh Kumar K.V | 3cf387d | 2011-02-28 17:03:57 +0530 | [diff] [blame] | 449 | } |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 450 | } |
| 451 | |
Aneesh Kumar K.V | fd2421f | 2011-07-11 16:40:59 +0000 | [diff] [blame] | 452 | static int v9fs_test_inode(struct inode *inode, void *data) |
| 453 | { |
| 454 | int umode; |
Aneesh Kumar K.V | 4508914 | 2011-07-25 18:06:33 +0000 | [diff] [blame] | 455 | dev_t rdev; |
Aneesh Kumar K.V | fd2421f | 2011-07-11 16:40:59 +0000 | [diff] [blame] | 456 | struct v9fs_inode *v9inode = V9FS_I(inode); |
| 457 | struct p9_wstat *st = (struct p9_wstat *)data; |
| 458 | struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode); |
| 459 | |
Aneesh Kumar K.V | 4508914 | 2011-07-25 18:06:33 +0000 | [diff] [blame] | 460 | umode = p9mode2unixmode(v9ses, st, &rdev); |
Aneesh Kumar K.V | fd2421f | 2011-07-11 16:40:59 +0000 | [diff] [blame] | 461 | /* don't match inode of different type */ |
| 462 | if ((inode->i_mode & S_IFMT) != (umode & S_IFMT)) |
| 463 | return 0; |
| 464 | |
| 465 | /* compare qid details */ |
| 466 | if (memcmp(&v9inode->qid.version, |
| 467 | &st->qid.version, sizeof(v9inode->qid.version))) |
| 468 | return 0; |
| 469 | |
| 470 | if (v9inode->qid.type != st->qid.type) |
| 471 | return 0; |
| 472 | return 1; |
| 473 | } |
| 474 | |
Aneesh Kumar K.V | ed80fcf | 2011-07-06 16:32:31 +0530 | [diff] [blame] | 475 | static int v9fs_test_new_inode(struct inode *inode, void *data) |
| 476 | { |
| 477 | return 0; |
| 478 | } |
| 479 | |
Aneesh Kumar K.V | fd2421f | 2011-07-11 16:40:59 +0000 | [diff] [blame] | 480 | static int v9fs_set_inode(struct inode *inode, void *data) |
| 481 | { |
| 482 | struct v9fs_inode *v9inode = V9FS_I(inode); |
| 483 | struct p9_wstat *st = (struct p9_wstat *)data; |
| 484 | |
| 485 | memcpy(&v9inode->qid, &st->qid, sizeof(st->qid)); |
| 486 | return 0; |
| 487 | } |
| 488 | |
Aneesh Kumar K.V | 5ffc0cb | 2011-02-28 17:04:01 +0530 | [diff] [blame] | 489 | static struct inode *v9fs_qid_iget(struct super_block *sb, |
| 490 | struct p9_qid *qid, |
Aneesh Kumar K.V | ed80fcf | 2011-07-06 16:32:31 +0530 | [diff] [blame] | 491 | struct p9_wstat *st, |
| 492 | int new) |
Aneesh Kumar K.V | 5ffc0cb | 2011-02-28 17:04:01 +0530 | [diff] [blame] | 493 | { |
Aneesh Kumar K.V | 4508914 | 2011-07-25 18:06:33 +0000 | [diff] [blame] | 494 | dev_t rdev; |
Aneesh Kumar K.V | 5ffc0cb | 2011-02-28 17:04:01 +0530 | [diff] [blame] | 495 | int retval, umode; |
| 496 | unsigned long i_ino; |
| 497 | struct inode *inode; |
| 498 | struct v9fs_session_info *v9ses = sb->s_fs_info; |
Aneesh Kumar K.V | ed80fcf | 2011-07-06 16:32:31 +0530 | [diff] [blame] | 499 | int (*test)(struct inode *, void *); |
| 500 | |
| 501 | if (new) |
| 502 | test = v9fs_test_new_inode; |
| 503 | else |
| 504 | test = v9fs_test_inode; |
Aneesh Kumar K.V | 5ffc0cb | 2011-02-28 17:04:01 +0530 | [diff] [blame] | 505 | |
| 506 | i_ino = v9fs_qid2ino(qid); |
Aneesh Kumar K.V | ed80fcf | 2011-07-06 16:32:31 +0530 | [diff] [blame] | 507 | inode = iget5_locked(sb, i_ino, test, v9fs_set_inode, st); |
Aneesh Kumar K.V | 5ffc0cb | 2011-02-28 17:04:01 +0530 | [diff] [blame] | 508 | if (!inode) |
| 509 | return ERR_PTR(-ENOMEM); |
| 510 | if (!(inode->i_state & I_NEW)) |
| 511 | return inode; |
| 512 | /* |
| 513 | * initialize the inode with the stat info |
| 514 | * FIXME!! we may need support for stale inodes |
| 515 | * later. |
| 516 | */ |
Aneesh Kumar K.V | fd2421f | 2011-07-11 16:40:59 +0000 | [diff] [blame] | 517 | inode->i_ino = i_ino; |
Aneesh Kumar K.V | 4508914 | 2011-07-25 18:06:33 +0000 | [diff] [blame] | 518 | umode = p9mode2unixmode(v9ses, st, &rdev); |
| 519 | retval = v9fs_init_inode(v9ses, inode, umode, rdev); |
Aneesh Kumar K.V | 5ffc0cb | 2011-02-28 17:04:01 +0530 | [diff] [blame] | 520 | if (retval) |
| 521 | goto error; |
| 522 | |
| 523 | v9fs_stat2inode(st, inode, sb); |
| 524 | #ifdef CONFIG_9P_FSCACHE |
Aneesh Kumar K.V | 5ffc0cb | 2011-02-28 17:04:01 +0530 | [diff] [blame] | 525 | v9fs_cache_inode_get_cookie(inode); |
| 526 | #endif |
| 527 | unlock_new_inode(inode); |
| 528 | return inode; |
| 529 | error: |
| 530 | unlock_new_inode(inode); |
| 531 | iput(inode); |
| 532 | return ERR_PTR(retval); |
| 533 | |
| 534 | } |
| 535 | |
Aneesh Kumar K.V | 53c06f4 | 2011-01-10 13:51:47 -0600 | [diff] [blame] | 536 | struct inode * |
Aneesh Kumar K.V | a78ce05 | 2011-02-28 17:04:02 +0530 | [diff] [blame] | 537 | v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, |
Aneesh Kumar K.V | ed80fcf | 2011-07-06 16:32:31 +0530 | [diff] [blame] | 538 | struct super_block *sb, int new) |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 539 | { |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 540 | struct p9_wstat *st; |
Aneesh Kumar K.V | 5ffc0cb | 2011-02-28 17:04:01 +0530 | [diff] [blame] | 541 | struct inode *inode = NULL; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 542 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 543 | st = p9_client_stat(fid); |
Abhishek Kulkarni | 02bc356 | 2009-07-19 13:41:54 -0600 | [diff] [blame] | 544 | if (IS_ERR(st)) |
| 545 | return ERR_CAST(st); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 546 | |
Aneesh Kumar K.V | ed80fcf | 2011-07-06 16:32:31 +0530 | [diff] [blame] | 547 | inode = v9fs_qid_iget(sb, &st->qid, st, new); |
Abhishek Kulkarni | 02bc356 | 2009-07-19 13:41:54 -0600 | [diff] [blame] | 548 | p9stat_free(st); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 549 | kfree(st); |
Aneesh Kumar K.V | 5ffc0cb | 2011-02-28 17:04:01 +0530 | [diff] [blame] | 550 | return inode; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 551 | } |
| 552 | |
| 553 | /** |
Aneesh Kumar K.V | f88657c | 2011-08-03 19:55:32 +0530 | [diff] [blame] | 554 | * v9fs_at_to_dotl_flags- convert Linux specific AT flags to |
| 555 | * plan 9 AT flag. |
| 556 | * @flags: flags to convert |
| 557 | */ |
| 558 | static int v9fs_at_to_dotl_flags(int flags) |
| 559 | { |
| 560 | int rflags = 0; |
| 561 | if (flags & AT_REMOVEDIR) |
| 562 | rflags |= P9_DOTL_AT_REMOVEDIR; |
| 563 | return rflags; |
| 564 | } |
| 565 | |
| 566 | /** |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 567 | * v9fs_remove - helper function to remove files and directories |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 568 | * @dir: directory inode that is being deleted |
Aneesh Kumar K.V | 48e370f | 2011-06-28 15:41:18 +0530 | [diff] [blame] | 569 | * @dentry: dentry that is being deleted |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 570 | * @rmdir: removing a directory |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 571 | * |
| 572 | */ |
| 573 | |
Aneesh Kumar K.V | 48e370f | 2011-06-28 15:41:18 +0530 | [diff] [blame] | 574 | static int v9fs_remove(struct inode *dir, struct dentry *dentry, int flags) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 575 | { |
Aneesh Kumar K.V | 48e370f | 2011-06-28 15:41:18 +0530 | [diff] [blame] | 576 | struct inode *inode; |
| 577 | int retval = -EOPNOTSUPP; |
| 578 | struct p9_fid *v9fid, *dfid; |
| 579 | struct v9fs_session_info *v9ses; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 580 | |
Aneesh Kumar K.V | 48e370f | 2011-06-28 15:41:18 +0530 | [diff] [blame] | 581 | P9_DPRINTK(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %x\n", |
| 582 | dir, dentry, flags); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 583 | |
Aneesh Kumar K.V | 48e370f | 2011-06-28 15:41:18 +0530 | [diff] [blame] | 584 | v9ses = v9fs_inode2v9ses(dir); |
| 585 | inode = dentry->d_inode; |
| 586 | dfid = v9fs_fid_lookup(dentry->d_parent); |
| 587 | if (IS_ERR(dfid)) { |
| 588 | retval = PTR_ERR(dfid); |
| 589 | P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", retval); |
| 590 | return retval; |
| 591 | } |
| 592 | if (v9fs_proto_dotl(v9ses)) |
Aneesh Kumar K.V | f88657c | 2011-08-03 19:55:32 +0530 | [diff] [blame] | 593 | retval = p9_client_unlinkat(dfid, dentry->d_name.name, |
| 594 | v9fs_at_to_dotl_flags(flags)); |
Aneesh Kumar K.V | 48e370f | 2011-06-28 15:41:18 +0530 | [diff] [blame] | 595 | if (retval == -EOPNOTSUPP) { |
| 596 | /* Try the one based on path */ |
| 597 | v9fid = v9fs_fid_clone(dentry); |
| 598 | if (IS_ERR(v9fid)) |
| 599 | return PTR_ERR(v9fid); |
| 600 | retval = p9_client_remove(v9fid); |
| 601 | } |
Aneesh Kumar K.V | b271ec4 | 2011-02-28 17:04:05 +0530 | [diff] [blame] | 602 | if (!retval) { |
| 603 | /* |
| 604 | * directories on unlink should have zero |
| 605 | * link count |
| 606 | */ |
Aneesh Kumar K.V | 48e370f | 2011-06-28 15:41:18 +0530 | [diff] [blame] | 607 | if (flags & AT_REMOVEDIR) { |
| 608 | clear_nlink(inode); |
Aneesh Kumar K.V | b271ec4 | 2011-02-28 17:04:05 +0530 | [diff] [blame] | 609 | drop_nlink(dir); |
| 610 | } else |
Aneesh Kumar K.V | 48e370f | 2011-06-28 15:41:18 +0530 | [diff] [blame] | 611 | drop_nlink(inode); |
Aneesh Kumar K.V | d28c61f | 2011-02-28 17:04:08 +0530 | [diff] [blame] | 612 | |
Aneesh Kumar K.V | 48e370f | 2011-06-28 15:41:18 +0530 | [diff] [blame] | 613 | v9fs_invalidate_inode_attr(inode); |
Aneesh Kumar K.V | d28c61f | 2011-02-28 17:04:08 +0530 | [diff] [blame] | 614 | v9fs_invalidate_inode_attr(dir); |
Aneesh Kumar K.V | b271ec4 | 2011-02-28 17:04:05 +0530 | [diff] [blame] | 615 | } |
Aneesh Kumar K.V | d994f40 | 2010-03-29 18:14:50 -0500 | [diff] [blame] | 616 | return retval; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 617 | } |
| 618 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 619 | /** |
| 620 | * v9fs_create - Create a file |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 621 | * @v9ses: session information |
| 622 | * @dir: directory that dentry is being created in |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 623 | * @dentry: dentry that is being created |
Abhishek Kulkarni | 0e15597 | 2009-07-19 13:41:55 -0600 | [diff] [blame] | 624 | * @extension: 9p2000.u extension string to support devices, etc. |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 625 | * @perm: create permissions |
| 626 | * @mode: open mode |
| 627 | * |
| 628 | */ |
| 629 | static struct p9_fid * |
| 630 | v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir, |
| 631 | struct dentry *dentry, char *extension, u32 perm, u8 mode) |
| 632 | { |
| 633 | int err; |
| 634 | char *name; |
| 635 | struct p9_fid *dfid, *ofid, *fid; |
| 636 | struct inode *inode; |
| 637 | |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 638 | P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); |
| 639 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 640 | err = 0; |
| 641 | ofid = NULL; |
| 642 | fid = NULL; |
| 643 | name = (char *) dentry->d_name.name; |
Venkateswararao Jujjuri | 6d27e64 | 2010-05-10 18:08:28 +0000 | [diff] [blame] | 644 | dfid = v9fs_fid_lookup(dentry->d_parent); |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 645 | if (IS_ERR(dfid)) { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 646 | err = PTR_ERR(dfid); |
Venkateswararao Jujjuri | 6d27e64 | 2010-05-10 18:08:28 +0000 | [diff] [blame] | 647 | P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); |
| 648 | return ERR_PTR(err); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 649 | } |
| 650 | |
| 651 | /* clone a fid to use for creation */ |
| 652 | ofid = p9_client_walk(dfid, 0, NULL, 1); |
| 653 | if (IS_ERR(ofid)) { |
| 654 | err = PTR_ERR(ofid); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 655 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); |
Venkateswararao Jujjuri | 6d27e64 | 2010-05-10 18:08:28 +0000 | [diff] [blame] | 656 | return ERR_PTR(err); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 657 | } |
| 658 | |
| 659 | err = p9_client_fcreate(ofid, name, perm, mode, extension); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 660 | if (err < 0) { |
| 661 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 662 | goto error; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 663 | } |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 664 | |
| 665 | /* now walk from the parent so we can get unopened fid */ |
Venkateswararao Jujjuri | 6d27e64 | 2010-05-10 18:08:28 +0000 | [diff] [blame] | 666 | fid = p9_client_walk(dfid, 1, &name, 1); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 667 | if (IS_ERR(fid)) { |
| 668 | err = PTR_ERR(fid); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 669 | P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 670 | fid = NULL; |
| 671 | goto error; |
Venkateswararao Jujjuri | 6d27e64 | 2010-05-10 18:08:28 +0000 | [diff] [blame] | 672 | } |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 673 | |
| 674 | /* instantiate inode and assign the unopened fid to the dentry */ |
Aneesh Kumar K.V | ed80fcf | 2011-07-06 16:32:31 +0530 | [diff] [blame] | 675 | inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 676 | if (IS_ERR(inode)) { |
| 677 | err = PTR_ERR(inode); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 678 | P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", err); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 679 | goto error; |
| 680 | } |
Abhishek Kulkarni | 50fb6d2 | 2009-07-19 13:41:57 -0600 | [diff] [blame] | 681 | err = v9fs_fid_add(dentry, fid); |
| 682 | if (err < 0) |
| 683 | goto error; |
Aneesh Kumar K.V | 5441ae5 | 2011-07-25 18:06:32 +0000 | [diff] [blame] | 684 | d_instantiate(dentry, inode); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 685 | return ofid; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 686 | error: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 687 | if (ofid) |
| 688 | p9_client_clunk(ofid); |
| 689 | |
| 690 | if (fid) |
| 691 | p9_client_clunk(fid); |
| 692 | |
| 693 | return ERR_PTR(err); |
| 694 | } |
| 695 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 696 | /** |
| 697 | * v9fs_vfs_create - VFS hook to create files |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 698 | * @dir: directory inode that is being created |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 699 | * @dentry: dentry that is being deleted |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 700 | * @mode: create permissions |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 701 | * @nd: path information |
| 702 | * |
| 703 | */ |
| 704 | |
| 705 | static int |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 706 | v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode, |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 707 | struct nameidata *nd) |
| 708 | { |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 709 | int err; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 710 | u32 perm; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 711 | int flags; |
Aneesh Kumar K.V | 6b39f6d | 2011-02-28 17:04:03 +0530 | [diff] [blame] | 712 | struct file *filp; |
| 713 | struct v9fs_inode *v9inode; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 714 | struct v9fs_session_info *v9ses; |
Aneesh Kumar K.V | 3cf387d | 2011-02-28 17:03:57 +0530 | [diff] [blame] | 715 | struct p9_fid *fid, *inode_fid; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 716 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 717 | err = 0; |
| 718 | fid = NULL; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 719 | v9ses = v9fs_inode2v9ses(dir); |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 720 | perm = unixmode2p9mode(v9ses, mode); |
Al Viro | dd7dd55 | 2011-06-25 21:17:17 -0400 | [diff] [blame] | 721 | if (nd) |
Al Viro | 8a5e929 | 2011-06-25 19:15:54 -0400 | [diff] [blame] | 722 | flags = nd->intent.open.flags; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 723 | else |
| 724 | flags = O_RDWR; |
| 725 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 726 | fid = v9fs_create(v9ses, dir, dentry, NULL, perm, |
Sripathi Kodi | dd6102f | 2010-03-05 18:48:00 +0000 | [diff] [blame] | 727 | v9fs_uflags2omode(flags, |
| 728 | v9fs_proto_dotu(v9ses))); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 729 | if (IS_ERR(fid)) { |
| 730 | err = PTR_ERR(fid); |
| 731 | fid = NULL; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 732 | goto error; |
| 733 | } |
| 734 | |
Aneesh Kumar K.V | d28c61f | 2011-02-28 17:04:08 +0530 | [diff] [blame] | 735 | v9fs_invalidate_inode_attr(dir); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 736 | /* if we are opening a file, assign the open fid to the file */ |
Al Viro | dd7dd55 | 2011-06-25 21:17:17 -0400 | [diff] [blame] | 737 | if (nd) { |
Aneesh Kumar K.V | 6b39f6d | 2011-02-28 17:04:03 +0530 | [diff] [blame] | 738 | v9inode = V9FS_I(dentry->d_inode); |
Aneesh Kumar K.V | 5a7e0a8 | 2011-03-08 16:39:46 +0530 | [diff] [blame] | 739 | mutex_lock(&v9inode->v_mutex); |
Aneesh Kumar K.V | 7add697 | 2011-03-08 16:39:49 +0530 | [diff] [blame] | 740 | if (v9ses->cache && !v9inode->writeback_fid && |
| 741 | ((flags & O_ACCMODE) != O_RDONLY)) { |
Aneesh Kumar K.V | 3cf387d | 2011-02-28 17:03:57 +0530 | [diff] [blame] | 742 | /* |
Aneesh Kumar K.V | 6b39f6d | 2011-02-28 17:04:03 +0530 | [diff] [blame] | 743 | * clone a fid and add it to writeback_fid |
Aneesh Kumar K.V | 3cf387d | 2011-02-28 17:03:57 +0530 | [diff] [blame] | 744 | * we do it during open time instead of |
| 745 | * page dirty time via write_begin/page_mkwrite |
| 746 | * because we want write after unlink usecase |
| 747 | * to work. |
| 748 | */ |
| 749 | inode_fid = v9fs_writeback_fid(dentry); |
| 750 | if (IS_ERR(inode_fid)) { |
| 751 | err = PTR_ERR(inode_fid); |
Aneesh Kumar K.V | 5a7e0a8 | 2011-03-08 16:39:46 +0530 | [diff] [blame] | 752 | mutex_unlock(&v9inode->v_mutex); |
Aneesh Kumar K.V | 3cf387d | 2011-02-28 17:03:57 +0530 | [diff] [blame] | 753 | goto error; |
| 754 | } |
Aneesh Kumar K.V | 6b39f6d | 2011-02-28 17:04:03 +0530 | [diff] [blame] | 755 | v9inode->writeback_fid = (void *) inode_fid; |
Aneesh Kumar K.V | 3cf387d | 2011-02-28 17:03:57 +0530 | [diff] [blame] | 756 | } |
Aneesh Kumar K.V | 5a7e0a8 | 2011-03-08 16:39:46 +0530 | [diff] [blame] | 757 | mutex_unlock(&v9inode->v_mutex); |
Aneesh Kumar K.V | 877cb3d | 2010-09-22 12:42:30 +0530 | [diff] [blame] | 758 | filp = lookup_instantiate_filp(nd, dentry, generic_file_open); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 759 | if (IS_ERR(filp)) { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 760 | err = PTR_ERR(filp); |
| 761 | goto error; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 762 | } |
| 763 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 764 | filp->private_data = fid; |
Aneesh Kumar K.V | 46848de | 2011-02-28 17:03:55 +0530 | [diff] [blame] | 765 | #ifdef CONFIG_9P_FSCACHE |
| 766 | if (v9ses->cache) |
| 767 | v9fs_cache_inode_set_cookie(dentry->d_inode, filp); |
| 768 | #endif |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 769 | } else |
| 770 | p9_client_clunk(fid); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 771 | |
| 772 | return 0; |
| 773 | |
| 774 | error: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 775 | if (fid) |
| 776 | p9_client_clunk(fid); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 777 | |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 778 | return err; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 779 | } |
| 780 | |
| 781 | /** |
| 782 | * v9fs_vfs_mkdir - VFS mkdir hook to create a directory |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 783 | * @dir: inode that is being unlinked |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 784 | * @dentry: dentry that is being unlinked |
| 785 | * @mode: mode for new directory |
| 786 | * |
| 787 | */ |
| 788 | |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 789 | 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] | 790 | { |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 791 | int err; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 792 | u32 perm; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 793 | struct p9_fid *fid; |
Aneesh Kumar K.V | d28c61f | 2011-02-28 17:04:08 +0530 | [diff] [blame] | 794 | struct v9fs_session_info *v9ses; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 795 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 796 | P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); |
| 797 | err = 0; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 798 | v9ses = v9fs_inode2v9ses(dir); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 799 | perm = unixmode2p9mode(v9ses, mode | S_IFDIR); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 800 | fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD); |
| 801 | if (IS_ERR(fid)) { |
| 802 | err = PTR_ERR(fid); |
| 803 | fid = NULL; |
Aneesh Kumar K.V | d28c61f | 2011-02-28 17:04:08 +0530 | [diff] [blame] | 804 | } else { |
Aneesh Kumar K.V | b271ec4 | 2011-02-28 17:04:05 +0530 | [diff] [blame] | 805 | inc_nlink(dir); |
Aneesh Kumar K.V | d28c61f | 2011-02-28 17:04:08 +0530 | [diff] [blame] | 806 | v9fs_invalidate_inode_attr(dir); |
| 807 | } |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 808 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 809 | if (fid) |
| 810 | p9_client_clunk(fid); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 811 | |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 812 | return err; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 813 | } |
| 814 | |
| 815 | /** |
| 816 | * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode |
| 817 | * @dir: inode that is being walked from |
| 818 | * @dentry: dentry that is being walked to? |
| 819 | * @nameidata: path data |
| 820 | * |
| 821 | */ |
| 822 | |
Aneesh Kumar K.V | 53c06f4 | 2011-01-10 13:51:47 -0600 | [diff] [blame] | 823 | struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 824 | struct nameidata *nameidata) |
| 825 | { |
Aneesh Kumar K.V | 73f5071 | 2011-08-16 22:19:28 +0530 | [diff] [blame] | 826 | struct dentry *res; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 827 | struct super_block *sb; |
| 828 | struct v9fs_session_info *v9ses; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 829 | struct p9_fid *dfid, *fid; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 830 | struct inode *inode; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 831 | char *name; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 832 | int result = 0; |
| 833 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 834 | 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] | 835 | dir, dentry->d_name.name, dentry, nameidata); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 836 | |
Sripathi Kodi | 11e9b49 | 2010-03-29 18:13:59 -0500 | [diff] [blame] | 837 | if (dentry->d_name.len > NAME_MAX) |
| 838 | return ERR_PTR(-ENAMETOOLONG); |
| 839 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 840 | sb = dir->i_sb; |
| 841 | v9ses = v9fs_inode2v9ses(dir); |
Aneesh Kumar K.V | a534c8d | 2010-06-30 19:18:50 +0530 | [diff] [blame] | 842 | /* We can walk d_parent because we hold the dir->i_mutex */ |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 843 | dfid = v9fs_fid_lookup(dentry->d_parent); |
| 844 | if (IS_ERR(dfid)) |
David Howells | e231c2e | 2008-02-07 00:15:26 -0800 | [diff] [blame] | 845 | return ERR_CAST(dfid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 846 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 847 | name = (char *) dentry->d_name.name; |
| 848 | fid = p9_client_walk(dfid, 1, &name, 1); |
| 849 | if (IS_ERR(fid)) { |
| 850 | result = PTR_ERR(fid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 851 | if (result == -ENOENT) { |
Aneesh Kumar K.V | 85e0df2 | 2010-05-14 13:04:39 +0000 | [diff] [blame] | 852 | inode = NULL; |
| 853 | goto inst_out; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 854 | } |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 855 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 856 | return ERR_PTR(result); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 857 | } |
Aneesh Kumar K.V | 73f5071 | 2011-08-16 22:19:28 +0530 | [diff] [blame] | 858 | /* |
| 859 | * Make sure we don't use a wrong inode due to parallel |
| 860 | * unlink. For cached mode create calls request for new |
| 861 | * inode. But with cache disabled, lookup should do this. |
| 862 | */ |
| 863 | if (v9ses->cache) |
| 864 | inode = v9fs_get_inode_from_fid(v9ses, fid, dir->i_sb); |
| 865 | else |
| 866 | inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 867 | if (IS_ERR(inode)) { |
| 868 | result = PTR_ERR(inode); |
| 869 | inode = NULL; |
| 870 | goto error; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 871 | } |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 872 | result = v9fs_fid_add(dentry, fid); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 873 | if (result < 0) |
Aneesh Kumar K.V | 9856af8 | 2010-09-22 12:24:23 +0530 | [diff] [blame] | 874 | goto error_iput; |
Aneesh Kumar K.V | 85e0df2 | 2010-05-14 13:04:39 +0000 | [diff] [blame] | 875 | inst_out: |
Aneesh Kumar K.V | 73f5071 | 2011-08-16 22:19:28 +0530 | [diff] [blame] | 876 | /* |
| 877 | * If we had a rename on the server and a parallel lookup |
| 878 | * for the new name, then make sure we instantiate with |
| 879 | * the new name. ie look up for a/b, while on server somebody |
| 880 | * moved b under k and client parallely did a lookup for |
| 881 | * k/b. |
| 882 | */ |
| 883 | res = d_materialise_unique(dentry, inode); |
| 884 | if (!IS_ERR(res)) |
| 885 | return res; |
| 886 | result = PTR_ERR(res); |
Aneesh Kumar K.V | 9856af8 | 2010-09-22 12:24:23 +0530 | [diff] [blame] | 887 | error_iput: |
| 888 | iput(inode); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 889 | error: |
Julien Brunel | 62aa528 | 2008-09-24 16:22:22 -0500 | [diff] [blame] | 890 | p9_client_clunk(fid); |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 891 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 892 | return ERR_PTR(result); |
| 893 | } |
| 894 | |
| 895 | /** |
| 896 | * v9fs_vfs_unlink - VFS unlink hook to delete an inode |
| 897 | * @i: inode that is being unlinked |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 898 | * @d: dentry that is being unlinked |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 899 | * |
| 900 | */ |
| 901 | |
Aneesh Kumar K.V | 53c06f4 | 2011-01-10 13:51:47 -0600 | [diff] [blame] | 902 | int v9fs_vfs_unlink(struct inode *i, struct dentry *d) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 903 | { |
| 904 | return v9fs_remove(i, d, 0); |
| 905 | } |
| 906 | |
| 907 | /** |
| 908 | * v9fs_vfs_rmdir - VFS unlink hook to delete a directory |
| 909 | * @i: inode that is being unlinked |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 910 | * @d: dentry that is being unlinked |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 911 | * |
| 912 | */ |
| 913 | |
Aneesh Kumar K.V | 53c06f4 | 2011-01-10 13:51:47 -0600 | [diff] [blame] | 914 | int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 915 | { |
Aneesh Kumar K.V | 48e370f | 2011-06-28 15:41:18 +0530 | [diff] [blame] | 916 | return v9fs_remove(i, d, AT_REMOVEDIR); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 917 | } |
| 918 | |
| 919 | /** |
| 920 | * v9fs_vfs_rename - VFS hook to rename an inode |
| 921 | * @old_dir: old dir inode |
| 922 | * @old_dentry: old dentry |
| 923 | * @new_dir: new dir inode |
| 924 | * @new_dentry: new dentry |
| 925 | * |
| 926 | */ |
| 927 | |
Aneesh Kumar K.V | 53c06f4 | 2011-01-10 13:51:47 -0600 | [diff] [blame] | 928 | int |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 929 | v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry, |
| 930 | struct inode *new_dir, struct dentry *new_dentry) |
| 931 | { |
Aneesh Kumar K.V | d28c61f | 2011-02-28 17:04:08 +0530 | [diff] [blame] | 932 | int retval; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 933 | struct inode *old_inode; |
Aneesh Kumar K.V | b271ec4 | 2011-02-28 17:04:05 +0530 | [diff] [blame] | 934 | struct inode *new_inode; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 935 | struct v9fs_session_info *v9ses; |
| 936 | struct p9_fid *oldfid; |
| 937 | struct p9_fid *olddirfid; |
| 938 | struct p9_fid *newdirfid; |
| 939 | struct p9_wstat wstat; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 940 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 941 | P9_DPRINTK(P9_DEBUG_VFS, "\n"); |
| 942 | retval = 0; |
| 943 | old_inode = old_dentry->d_inode; |
Aneesh Kumar K.V | b271ec4 | 2011-02-28 17:04:05 +0530 | [diff] [blame] | 944 | new_inode = new_dentry->d_inode; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 945 | v9ses = v9fs_inode2v9ses(old_inode); |
| 946 | oldfid = v9fs_fid_lookup(old_dentry); |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 947 | if (IS_ERR(oldfid)) |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 948 | return PTR_ERR(oldfid); |
| 949 | |
| 950 | olddirfid = v9fs_fid_clone(old_dentry->d_parent); |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 951 | if (IS_ERR(olddirfid)) { |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 952 | retval = PTR_ERR(olddirfid); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 953 | goto done; |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 954 | } |
| 955 | |
| 956 | newdirfid = v9fs_fid_clone(new_dentry->d_parent); |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 957 | if (IS_ERR(newdirfid)) { |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 958 | retval = PTR_ERR(newdirfid); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 959 | goto clunk_olddir; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 960 | } |
| 961 | |
Aneesh Kumar K.V | a534c8d | 2010-06-30 19:18:50 +0530 | [diff] [blame] | 962 | down_write(&v9ses->rename_sem); |
Sripathi Kodi | 4681dbd | 2010-03-25 12:47:26 +0000 | [diff] [blame] | 963 | if (v9fs_proto_dotl(v9ses)) { |
Aneesh Kumar K.V | 9e8fb38 | 2011-06-28 15:41:16 +0530 | [diff] [blame] | 964 | retval = p9_client_renameat(olddirfid, old_dentry->d_name.name, |
| 965 | newdirfid, new_dentry->d_name.name); |
| 966 | if (retval == -EOPNOTSUPP) |
| 967 | retval = p9_client_rename(oldfid, newdirfid, |
| 968 | new_dentry->d_name.name); |
| 969 | if (retval != -EOPNOTSUPP) |
Sripathi Kodi | 4681dbd | 2010-03-25 12:47:26 +0000 | [diff] [blame] | 970 | goto clunk_newdir; |
| 971 | } |
Aneesh Kumar K.V | a534c8d | 2010-06-30 19:18:50 +0530 | [diff] [blame] | 972 | if (old_dentry->d_parent != new_dentry->d_parent) { |
| 973 | /* |
| 974 | * 9P .u can only handle file rename in the same directory |
| 975 | */ |
Sripathi Kodi | 4681dbd | 2010-03-25 12:47:26 +0000 | [diff] [blame] | 976 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 977 | P9_DPRINTK(P9_DEBUG_ERROR, |
| 978 | "old dir and new dir are different\n"); |
Eric Van Hensbergen | 621997c | 2007-01-26 00:57:04 -0800 | [diff] [blame] | 979 | retval = -EXDEV; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 980 | goto clunk_newdir; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 981 | } |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 982 | v9fs_blank_wstat(&wstat); |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 983 | wstat.muid = v9ses->uname; |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 984 | wstat.name = (char *) new_dentry->d_name.name; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 985 | retval = p9_client_wstat(oldfid, &wstat); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 986 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 987 | clunk_newdir: |
Aneesh Kumar K.V | b271ec4 | 2011-02-28 17:04:05 +0530 | [diff] [blame] | 988 | if (!retval) { |
| 989 | if (new_inode) { |
| 990 | if (S_ISDIR(new_inode->i_mode)) |
| 991 | clear_nlink(new_inode); |
| 992 | else |
| 993 | drop_nlink(new_inode); |
| 994 | } |
| 995 | if (S_ISDIR(old_inode->i_mode)) { |
| 996 | if (!new_inode) |
| 997 | inc_nlink(new_dir); |
| 998 | drop_nlink(old_dir); |
| 999 | } |
Aneesh Kumar K.V | 3bc86de | 2011-02-28 17:04:07 +0530 | [diff] [blame] | 1000 | v9fs_invalidate_inode_attr(old_inode); |
Aneesh Kumar K.V | d28c61f | 2011-02-28 17:04:08 +0530 | [diff] [blame] | 1001 | v9fs_invalidate_inode_attr(old_dir); |
| 1002 | v9fs_invalidate_inode_attr(new_dir); |
Aneesh Kumar K.V | 3bc86de | 2011-02-28 17:04:07 +0530 | [diff] [blame] | 1003 | |
Aneesh Kumar K.V | a534c8d | 2010-06-30 19:18:50 +0530 | [diff] [blame] | 1004 | /* successful rename */ |
| 1005 | d_move(old_dentry, new_dentry); |
Aneesh Kumar K.V | b271ec4 | 2011-02-28 17:04:05 +0530 | [diff] [blame] | 1006 | } |
Aneesh Kumar K.V | a534c8d | 2010-06-30 19:18:50 +0530 | [diff] [blame] | 1007 | up_write(&v9ses->rename_sem); |
Latchesar Ionkov | 22150c4 | 2007-10-23 13:48:33 -0500 | [diff] [blame] | 1008 | p9_client_clunk(newdirfid); |
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 | clunk_olddir: |
Latchesar Ionkov | 22150c4 | 2007-10-23 13:48:33 -0500 | [diff] [blame] | 1011 | p9_client_clunk(olddirfid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1012 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1013 | done: |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1014 | return retval; |
| 1015 | } |
| 1016 | |
| 1017 | /** |
Adrian Bunk | 943ffb5 | 2006-01-10 00:10:13 +0100 | [diff] [blame] | 1018 | * v9fs_vfs_getattr - retrieve file metadata |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 1019 | * @mnt: mount information |
| 1020 | * @dentry: file to get attributes on |
| 1021 | * @stat: metadata structure to populate |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1022 | * |
| 1023 | */ |
| 1024 | |
| 1025 | static int |
| 1026 | v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry, |
| 1027 | struct kstat *stat) |
| 1028 | { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1029 | int err; |
| 1030 | struct v9fs_session_info *v9ses; |
| 1031 | struct p9_fid *fid; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1032 | struct p9_wstat *st; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1033 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1034 | P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry); |
| 1035 | err = -EPERM; |
Aneesh Kumar K.V | 42869c8 | 2011-03-08 16:39:50 +0530 | [diff] [blame] | 1036 | v9ses = v9fs_dentry2v9ses(dentry); |
Aneesh Kumar K.V | a121190 | 2011-02-28 17:04:01 +0530 | [diff] [blame] | 1037 | if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { |
| 1038 | generic_fillattr(dentry->d_inode, stat); |
| 1039 | return 0; |
| 1040 | } |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1041 | fid = v9fs_fid_lookup(dentry); |
| 1042 | if (IS_ERR(fid)) |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 1043 | return PTR_ERR(fid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1044 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1045 | st = p9_client_stat(fid); |
| 1046 | if (IS_ERR(st)) |
| 1047 | return PTR_ERR(st); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1048 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1049 | v9fs_stat2inode(st, dentry->d_inode, dentry->d_inode->i_sb); |
Aneesh Kumar K.V | 4508914 | 2011-07-25 18:06:33 +0000 | [diff] [blame] | 1050 | generic_fillattr(dentry->d_inode, stat); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1051 | |
Latchesar Ionkov | 62b2be5 | 2010-08-24 18:13:59 +0000 | [diff] [blame] | 1052 | p9stat_free(st); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1053 | kfree(st); |
| 1054 | return 0; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1055 | } |
| 1056 | |
| 1057 | /** |
| 1058 | * v9fs_vfs_setattr - set file metadata |
| 1059 | * @dentry: file whose metadata to set |
| 1060 | * @iattr: metadata assignment structure |
| 1061 | * |
| 1062 | */ |
| 1063 | |
| 1064 | static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr) |
| 1065 | { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1066 | int retval; |
| 1067 | struct v9fs_session_info *v9ses; |
| 1068 | struct p9_fid *fid; |
| 1069 | struct p9_wstat wstat; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1070 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1071 | P9_DPRINTK(P9_DEBUG_VFS, "\n"); |
Aneesh Kumar K.V | 059c138 | 2011-03-08 16:39:48 +0530 | [diff] [blame] | 1072 | retval = inode_change_ok(dentry->d_inode, iattr); |
| 1073 | if (retval) |
| 1074 | return retval; |
| 1075 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1076 | retval = -EPERM; |
Aneesh Kumar K.V | 42869c8 | 2011-03-08 16:39:50 +0530 | [diff] [blame] | 1077 | v9ses = v9fs_dentry2v9ses(dentry); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1078 | fid = v9fs_fid_lookup(dentry); |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 1079 | if(IS_ERR(fid)) |
| 1080 | return PTR_ERR(fid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1081 | |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1082 | v9fs_blank_wstat(&wstat); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1083 | if (iattr->ia_valid & ATTR_MODE) |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1084 | wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1085 | |
| 1086 | if (iattr->ia_valid & ATTR_MTIME) |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1087 | wstat.mtime = iattr->ia_mtime.tv_sec; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1088 | |
| 1089 | if (iattr->ia_valid & ATTR_ATIME) |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1090 | wstat.atime = iattr->ia_atime.tv_sec; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1091 | |
| 1092 | if (iattr->ia_valid & ATTR_SIZE) |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1093 | wstat.length = iattr->ia_size; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1094 | |
Sripathi Kodi | dd6102f | 2010-03-05 18:48:00 +0000 | [diff] [blame] | 1095 | if (v9fs_proto_dotu(v9ses)) { |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1096 | if (iattr->ia_valid & ATTR_UID) |
| 1097 | wstat.n_uid = iattr->ia_uid; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1098 | |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1099 | if (iattr->ia_valid & ATTR_GID) |
| 1100 | wstat.n_gid = iattr->ia_gid; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1101 | } |
Aneesh Kumar K.V | 059c138 | 2011-03-08 16:39:48 +0530 | [diff] [blame] | 1102 | |
Aneesh Kumar K.V | 3dc5436 | 2011-02-28 17:04:11 +0530 | [diff] [blame] | 1103 | /* Write all dirty data */ |
| 1104 | if (S_ISREG(dentry->d_inode->i_mode)) |
| 1105 | filemap_write_and_wait(dentry->d_inode->i_mapping); |
| 1106 | |
Aneesh Kumar K.V | f10fc50 | 2011-02-28 17:04:10 +0530 | [diff] [blame] | 1107 | retval = p9_client_wstat(fid, &wstat); |
| 1108 | if (retval < 0) |
| 1109 | return retval; |
Aneesh Kumar K.V | 059c138 | 2011-03-08 16:39:48 +0530 | [diff] [blame] | 1110 | |
| 1111 | if ((iattr->ia_valid & ATTR_SIZE) && |
| 1112 | iattr->ia_size != i_size_read(dentry->d_inode)) |
| 1113 | truncate_setsize(dentry->d_inode, iattr->ia_size); |
| 1114 | |
Aneesh Kumar K.V | f10fc50 | 2011-02-28 17:04:10 +0530 | [diff] [blame] | 1115 | v9fs_invalidate_inode_attr(dentry->d_inode); |
Christoph Hellwig | 1025774 | 2010-06-04 11:30:02 +0200 | [diff] [blame] | 1116 | |
| 1117 | setattr_copy(dentry->d_inode, iattr); |
| 1118 | mark_inode_dirty(dentry->d_inode); |
| 1119 | return 0; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1120 | } |
| 1121 | |
| 1122 | /** |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1123 | * v9fs_stat2inode - populate an inode structure with mistat info |
| 1124 | * @stat: Plan 9 metadata (mistat) structure |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1125 | * @inode: inode to populate |
| 1126 | * @sb: superblock of filesystem |
| 1127 | * |
| 1128 | */ |
| 1129 | |
| 1130 | void |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1131 | v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode, |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1132 | struct super_block *sb) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1133 | { |
Aneesh Kumar K.V | 4508914 | 2011-07-25 18:06:33 +0000 | [diff] [blame] | 1134 | mode_t mode; |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1135 | char ext[32]; |
Aneesh Kumar K.V | 5717144 | 2010-03-05 14:43:43 -0600 | [diff] [blame] | 1136 | char tag_name[14]; |
| 1137 | unsigned int i_nlink; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1138 | struct v9fs_session_info *v9ses = sb->s_fs_info; |
Aneesh Kumar K.V | b3cbea0 | 2011-02-28 17:04:06 +0530 | [diff] [blame] | 1139 | struct v9fs_inode *v9inode = V9FS_I(inode); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1140 | |
Miklos Szeredi | bfe8684 | 2011-10-28 14:13:29 +0200 | [diff] [blame] | 1141 | set_nlink(inode, 1); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1142 | |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1143 | inode->i_atime.tv_sec = stat->atime; |
| 1144 | inode->i_mtime.tv_sec = stat->mtime; |
| 1145 | inode->i_ctime.tv_sec = stat->mtime; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1146 | |
Latchesar Ionkov | bd32b82 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 1147 | inode->i_uid = v9ses->dfltuid; |
| 1148 | inode->i_gid = v9ses->dfltgid; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1149 | |
Sripathi Kodi | dd6102f | 2010-03-05 18:48:00 +0000 | [diff] [blame] | 1150 | if (v9fs_proto_dotu(v9ses)) { |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1151 | inode->i_uid = stat->n_uid; |
| 1152 | inode->i_gid = stat->n_gid; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1153 | } |
Aneesh Kumar K.V | 5717144 | 2010-03-05 14:43:43 -0600 | [diff] [blame] | 1154 | if ((S_ISREG(inode->i_mode)) || (S_ISDIR(inode->i_mode))) { |
| 1155 | if (v9fs_proto_dotu(v9ses) && (stat->extension[0] != '\0')) { |
| 1156 | /* |
| 1157 | * Hadlink support got added later to |
| 1158 | * to the .u extension. So there can be |
| 1159 | * server out there that doesn't support |
| 1160 | * this even with .u extension. So check |
| 1161 | * for non NULL stat->extension |
| 1162 | */ |
| 1163 | strncpy(ext, stat->extension, sizeof(ext)); |
| 1164 | /* HARDLINKCOUNT %u */ |
| 1165 | sscanf(ext, "%13s %u", tag_name, &i_nlink); |
| 1166 | if (!strncmp(tag_name, "HARDLINKCOUNT", 13)) |
Miklos Szeredi | bfe8684 | 2011-10-28 14:13:29 +0200 | [diff] [blame] | 1167 | set_nlink(inode, i_nlink); |
Aneesh Kumar K.V | 5717144 | 2010-03-05 14:43:43 -0600 | [diff] [blame] | 1168 | } |
| 1169 | } |
Aneesh Kumar K.V | 4508914 | 2011-07-25 18:06:33 +0000 | [diff] [blame] | 1170 | mode = stat->mode & S_IALLUGO; |
| 1171 | mode |= inode->i_mode & ~S_IALLUGO; |
| 1172 | inode->i_mode = mode; |
Abhishek Kulkarni | 7549ae3 | 2009-09-22 11:34:05 -0500 | [diff] [blame] | 1173 | i_size_write(inode, stat->length); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1174 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1175 | /* not real number of blocks, but 512 byte ones ... */ |
Abhishek Kulkarni | 7549ae3 | 2009-09-22 11:34:05 -0500 | [diff] [blame] | 1176 | inode->i_blocks = (i_size_read(inode) + 512 - 1) >> 9; |
Aneesh Kumar K.V | b3cbea0 | 2011-02-28 17:04:06 +0530 | [diff] [blame] | 1177 | v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1178 | } |
| 1179 | |
| 1180 | /** |
| 1181 | * v9fs_qid2ino - convert qid into inode number |
| 1182 | * @qid: qid to hash |
| 1183 | * |
| 1184 | * BUG: potential for inode number collisions? |
| 1185 | */ |
| 1186 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1187 | ino_t v9fs_qid2ino(struct p9_qid *qid) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1188 | { |
| 1189 | u64 path = qid->path + 2; |
| 1190 | ino_t i = 0; |
| 1191 | |
| 1192 | if (sizeof(ino_t) == sizeof(path)) |
| 1193 | memcpy(&i, &path, sizeof(ino_t)); |
| 1194 | else |
| 1195 | i = (ino_t) (path ^ (path >> 32)); |
| 1196 | |
| 1197 | return i; |
| 1198 | } |
| 1199 | |
| 1200 | /** |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1201 | * v9fs_readlink - read a symlink's location (internal version) |
| 1202 | * @dentry: dentry for symlink |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 1203 | * @buffer: buffer to load symlink location into |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1204 | * @buflen: length of buffer |
| 1205 | * |
| 1206 | */ |
| 1207 | |
| 1208 | static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen) |
| 1209 | { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1210 | int retval; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1211 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1212 | struct v9fs_session_info *v9ses; |
| 1213 | struct p9_fid *fid; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1214 | struct p9_wstat *st; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1215 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1216 | P9_DPRINTK(P9_DEBUG_VFS, " %s\n", dentry->d_name.name); |
| 1217 | retval = -EPERM; |
Aneesh Kumar K.V | 42869c8 | 2011-03-08 16:39:50 +0530 | [diff] [blame] | 1218 | v9ses = v9fs_dentry2v9ses(dentry); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1219 | fid = v9fs_fid_lookup(dentry); |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 1220 | if (IS_ERR(fid)) |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 1221 | return PTR_ERR(fid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1222 | |
M. Mohan Kumar | 329176c | 2010-09-28 19:59:25 +0530 | [diff] [blame] | 1223 | if (!v9fs_proto_dotu(v9ses)) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1224 | return -EBADF; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1225 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1226 | st = p9_client_stat(fid); |
| 1227 | if (IS_ERR(st)) |
| 1228 | return PTR_ERR(st); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1229 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1230 | if (!(st->mode & P9_DMSYMLINK)) { |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1231 | retval = -EINVAL; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1232 | goto done; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1233 | } |
| 1234 | |
| 1235 | /* copy extension buffer into buffer */ |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1236 | strncpy(buffer, st->extension, buflen); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1237 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1238 | P9_DPRINTK(P9_DEBUG_VFS, |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1239 | "%s -> %s (%s)\n", dentry->d_name.name, st->extension, buffer); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1240 | |
Martin Stava | 2511cd0 | 2009-11-02 08:39:34 -0600 | [diff] [blame] | 1241 | retval = strnlen(buffer, buflen); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1242 | done: |
Latchesar Ionkov | 62b2be5 | 2010-08-24 18:13:59 +0000 | [diff] [blame] | 1243 | p9stat_free(st); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1244 | kfree(st); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1245 | return retval; |
| 1246 | } |
| 1247 | |
| 1248 | /** |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1249 | * v9fs_vfs_follow_link - follow a symlink path |
| 1250 | * @dentry: dentry for symlink |
| 1251 | * @nd: nameidata |
| 1252 | * |
| 1253 | */ |
| 1254 | |
| 1255 | static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd) |
| 1256 | { |
| 1257 | int len = 0; |
| 1258 | char *link = __getname(); |
| 1259 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1260 | P9_DPRINTK(P9_DEBUG_VFS, "%s n", dentry->d_name.name); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1261 | |
| 1262 | if (!link) |
| 1263 | link = ERR_PTR(-ENOMEM); |
| 1264 | else { |
Latchesar Ionkov | 16cce6d | 2006-03-25 03:07:26 -0800 | [diff] [blame] | 1265 | len = v9fs_readlink(dentry, link, PATH_MAX); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1266 | |
| 1267 | if (len < 0) { |
Davi Arnaut | ce44eeb | 2005-11-07 00:59:36 -0800 | [diff] [blame] | 1268 | __putname(link); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1269 | link = ERR_PTR(len); |
| 1270 | } else |
Martin Stava | 2511cd0 | 2009-11-02 08:39:34 -0600 | [diff] [blame] | 1271 | link[min(len, PATH_MAX-1)] = 0; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1272 | } |
| 1273 | nd_set_link(nd, link); |
| 1274 | |
| 1275 | return NULL; |
| 1276 | } |
| 1277 | |
| 1278 | /** |
| 1279 | * v9fs_vfs_put_link - release a symlink path |
| 1280 | * @dentry: dentry for symlink |
| 1281 | * @nd: nameidata |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 1282 | * @p: unused |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1283 | * |
| 1284 | */ |
| 1285 | |
Aneesh Kumar K.V | 53c06f4 | 2011-01-10 13:51:47 -0600 | [diff] [blame] | 1286 | void |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 1287 | 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] | 1288 | { |
| 1289 | char *s = nd_get_link(nd); |
| 1290 | |
Duane Griffin | 6ff2320 | 2008-12-19 16:45:21 -0600 | [diff] [blame] | 1291 | P9_DPRINTK(P9_DEBUG_VFS, " %s %s\n", dentry->d_name.name, |
| 1292 | IS_ERR(s) ? "<error>" : s); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1293 | if (!IS_ERR(s)) |
Davi Arnaut | ce44eeb | 2005-11-07 00:59:36 -0800 | [diff] [blame] | 1294 | __putname(s); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1295 | } |
| 1296 | |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 1297 | /** |
| 1298 | * v9fs_vfs_mkspecial - create a special file |
| 1299 | * @dir: inode to create special file in |
| 1300 | * @dentry: dentry to create |
| 1301 | * @mode: mode to create special file |
| 1302 | * @extension: 9p2000.u format extension string representing special file |
| 1303 | * |
| 1304 | */ |
| 1305 | |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1306 | static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, |
| 1307 | int mode, const char *extension) |
| 1308 | { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1309 | u32 perm; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1310 | struct p9_fid *fid; |
Aneesh Kumar K.V | d28c61f | 2011-02-28 17:04:08 +0530 | [diff] [blame] | 1311 | struct v9fs_session_info *v9ses; |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1312 | |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 1313 | v9ses = v9fs_inode2v9ses(dir); |
Sripathi Kodi | dd6102f | 2010-03-05 18:48:00 +0000 | [diff] [blame] | 1314 | if (!v9fs_proto_dotu(v9ses)) { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1315 | P9_DPRINTK(P9_DEBUG_ERROR, "not extended\n"); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 1316 | return -EPERM; |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1317 | } |
| 1318 | |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 1319 | perm = unixmode2p9mode(v9ses, mode); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1320 | fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm, |
| 1321 | P9_OREAD); |
| 1322 | if (IS_ERR(fid)) |
| 1323 | return PTR_ERR(fid); |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 1324 | |
Aneesh Kumar K.V | d28c61f | 2011-02-28 17:04:08 +0530 | [diff] [blame] | 1325 | v9fs_invalidate_inode_attr(dir); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1326 | p9_client_clunk(fid); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 1327 | return 0; |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1328 | } |
| 1329 | |
| 1330 | /** |
| 1331 | * v9fs_vfs_symlink - helper function to create symlinks |
| 1332 | * @dir: directory inode containing symlink |
| 1333 | * @dentry: dentry for symlink |
| 1334 | * @symname: symlink data |
| 1335 | * |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 1336 | * See Also: 9P2000.u RFC for more information |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1337 | * |
| 1338 | */ |
| 1339 | |
| 1340 | static int |
| 1341 | v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname) |
| 1342 | { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1343 | P9_DPRINTK(P9_DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino, |
| 1344 | dentry->d_name.name, symname); |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1345 | |
| 1346 | return v9fs_vfs_mkspecial(dir, dentry, S_IFLNK, symname); |
| 1347 | } |
| 1348 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1349 | /** |
| 1350 | * v9fs_vfs_link - create a hardlink |
| 1351 | * @old_dentry: dentry for file to link to |
| 1352 | * @dir: inode destination for new link |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 1353 | * @dentry: dentry for link |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1354 | * |
| 1355 | */ |
| 1356 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1357 | static int |
| 1358 | v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, |
| 1359 | struct dentry *dentry) |
| 1360 | { |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1361 | int retval; |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1362 | char *name; |
Aneesh Kumar K.V | d28c61f | 2011-02-28 17:04:08 +0530 | [diff] [blame] | 1363 | struct p9_fid *oldfid; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1364 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1365 | P9_DPRINTK(P9_DEBUG_VFS, |
| 1366 | " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name, |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1367 | old_dentry->d_name.name); |
| 1368 | |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 1369 | oldfid = v9fs_fid_clone(old_dentry); |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 1370 | if (IS_ERR(oldfid)) |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 1371 | return PTR_ERR(oldfid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1372 | |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1373 | name = __getname(); |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 1374 | if (unlikely(!name)) { |
| 1375 | retval = -ENOMEM; |
| 1376 | goto clunk_fid; |
| 1377 | } |
Florin Malita | 0710d36 | 2006-06-25 05:48:31 -0700 | [diff] [blame] | 1378 | |
Latchesar Ionkov | 16cce6d | 2006-03-25 03:07:26 -0800 | [diff] [blame] | 1379 | sprintf(name, "%d\n", oldfid->fid); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1380 | retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name); |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1381 | __putname(name); |
Aneesh Kumar K.V | c06c066 | 2011-02-28 17:04:09 +0530 | [diff] [blame] | 1382 | if (!retval) { |
| 1383 | v9fs_refresh_inode(oldfid, old_dentry->d_inode); |
Aneesh Kumar K.V | d28c61f | 2011-02-28 17:04:08 +0530 | [diff] [blame] | 1384 | v9fs_invalidate_inode_attr(dir); |
Aneesh Kumar K.V | c06c066 | 2011-02-28 17:04:09 +0530 | [diff] [blame] | 1385 | } |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 1386 | clunk_fid: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1387 | p9_client_clunk(oldfid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1388 | return retval; |
| 1389 | } |
| 1390 | |
| 1391 | /** |
| 1392 | * v9fs_vfs_mknod - create a special file |
| 1393 | * @dir: inode destination for new link |
| 1394 | * @dentry: dentry for file |
| 1395 | * @mode: mode for creation |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 1396 | * @rdev: device associated with special file |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1397 | * |
| 1398 | */ |
| 1399 | |
| 1400 | static int |
| 1401 | v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev) |
| 1402 | { |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1403 | int retval; |
| 1404 | char *name; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1405 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1406 | P9_DPRINTK(P9_DEBUG_VFS, |
| 1407 | " %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] | 1408 | dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev)); |
| 1409 | |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1410 | if (!new_valid_dev(rdev)) |
| 1411 | return -EINVAL; |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 1412 | |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1413 | name = __getname(); |
Eugene Teo | c0291a0 | 2006-03-25 03:07:27 -0800 | [diff] [blame] | 1414 | if (!name) |
| 1415 | return -ENOMEM; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1416 | /* build extension */ |
| 1417 | if (S_ISBLK(mode)) |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1418 | sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev)); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1419 | else if (S_ISCHR(mode)) |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1420 | sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev)); |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 1421 | else if (S_ISFIFO(mode)) |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1422 | *name = 0; |
Venkateswararao Jujjuri | 75cc5c9 | 2010-05-22 12:20:30 -0500 | [diff] [blame] | 1423 | else if (S_ISSOCK(mode)) |
| 1424 | *name = 0; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1425 | else { |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1426 | __putname(name); |
| 1427 | return -EINVAL; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1428 | } |
| 1429 | |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1430 | retval = v9fs_vfs_mkspecial(dir, dentry, mode, name); |
| 1431 | __putname(name); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1432 | |
| 1433 | return retval; |
| 1434 | } |
| 1435 | |
Aneesh Kumar K.V | b3cbea0 | 2011-02-28 17:04:06 +0530 | [diff] [blame] | 1436 | int v9fs_refresh_inode(struct p9_fid *fid, struct inode *inode) |
| 1437 | { |
Aneesh Kumar K.V | 4508914 | 2011-07-25 18:06:33 +0000 | [diff] [blame] | 1438 | int umode; |
| 1439 | dev_t rdev; |
Aneesh Kumar K.V | b3cbea0 | 2011-02-28 17:04:06 +0530 | [diff] [blame] | 1440 | loff_t i_size; |
| 1441 | struct p9_wstat *st; |
| 1442 | struct v9fs_session_info *v9ses; |
| 1443 | |
| 1444 | v9ses = v9fs_inode2v9ses(inode); |
| 1445 | st = p9_client_stat(fid); |
| 1446 | if (IS_ERR(st)) |
| 1447 | return PTR_ERR(st); |
Aneesh Kumar K.V | 4508914 | 2011-07-25 18:06:33 +0000 | [diff] [blame] | 1448 | /* |
| 1449 | * Don't update inode if the file type is different |
| 1450 | */ |
| 1451 | umode = p9mode2unixmode(v9ses, st, &rdev); |
| 1452 | if ((inode->i_mode & S_IFMT) != (umode & S_IFMT)) |
| 1453 | goto out; |
Aneesh Kumar K.V | b3cbea0 | 2011-02-28 17:04:06 +0530 | [diff] [blame] | 1454 | |
| 1455 | spin_lock(&inode->i_lock); |
| 1456 | /* |
| 1457 | * We don't want to refresh inode->i_size, |
| 1458 | * because we may have cached data |
| 1459 | */ |
| 1460 | i_size = inode->i_size; |
| 1461 | v9fs_stat2inode(st, inode, inode->i_sb); |
| 1462 | if (v9ses->cache) |
| 1463 | inode->i_size = i_size; |
| 1464 | spin_unlock(&inode->i_lock); |
Aneesh Kumar K.V | 4508914 | 2011-07-25 18:06:33 +0000 | [diff] [blame] | 1465 | out: |
Aneesh Kumar K.V | b3cbea0 | 2011-02-28 17:04:06 +0530 | [diff] [blame] | 1466 | p9stat_free(st); |
| 1467 | kfree(st); |
| 1468 | return 0; |
| 1469 | } |
| 1470 | |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 1471 | static const struct inode_operations v9fs_dir_inode_operations_dotu = { |
| 1472 | .create = v9fs_vfs_create, |
| 1473 | .lookup = v9fs_vfs_lookup, |
| 1474 | .symlink = v9fs_vfs_symlink, |
Venkateswararao Jujjuri (JV) | 50cc42f | 2010-06-09 15:59:31 -0700 | [diff] [blame] | 1475 | .link = v9fs_vfs_link, |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 1476 | .unlink = v9fs_vfs_unlink, |
| 1477 | .mkdir = v9fs_vfs_mkdir, |
| 1478 | .rmdir = v9fs_vfs_rmdir, |
Aneesh Kumar K.V | 1d76e31 | 2010-08-30 17:43:07 +0000 | [diff] [blame] | 1479 | .mknod = v9fs_vfs_mknod, |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 1480 | .rename = v9fs_vfs_rename, |
| 1481 | .getattr = v9fs_vfs_getattr, |
| 1482 | .setattr = v9fs_vfs_setattr, |
| 1483 | }; |
| 1484 | |
Arjan van de Ven | 754661f | 2007-02-12 00:55:38 -0800 | [diff] [blame] | 1485 | static const struct inode_operations v9fs_dir_inode_operations = { |
Eric Van Hensbergen | b501611 | 2005-09-09 13:04:27 -0700 | [diff] [blame] | 1486 | .create = v9fs_vfs_create, |
| 1487 | .lookup = v9fs_vfs_lookup, |
| 1488 | .unlink = v9fs_vfs_unlink, |
| 1489 | .mkdir = v9fs_vfs_mkdir, |
| 1490 | .rmdir = v9fs_vfs_rmdir, |
| 1491 | .mknod = v9fs_vfs_mknod, |
| 1492 | .rename = v9fs_vfs_rename, |
| 1493 | .getattr = v9fs_vfs_getattr, |
| 1494 | .setattr = v9fs_vfs_setattr, |
| 1495 | }; |
| 1496 | |
Arjan van de Ven | 754661f | 2007-02-12 00:55:38 -0800 | [diff] [blame] | 1497 | static const struct inode_operations v9fs_file_inode_operations = { |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1498 | .getattr = v9fs_vfs_getattr, |
| 1499 | .setattr = v9fs_vfs_setattr, |
| 1500 | }; |
| 1501 | |
Arjan van de Ven | 754661f | 2007-02-12 00:55:38 -0800 | [diff] [blame] | 1502 | static const struct inode_operations v9fs_symlink_inode_operations = { |
Al Viro | 204f2f0 | 2009-12-23 00:35:54 -0500 | [diff] [blame] | 1503 | .readlink = generic_readlink, |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1504 | .follow_link = v9fs_vfs_follow_link, |
| 1505 | .put_link = v9fs_vfs_put_link, |
| 1506 | .getattr = v9fs_vfs_getattr, |
| 1507 | .setattr = v9fs_vfs_setattr, |
| 1508 | }; |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 1509 | |