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 | |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 26 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 27 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 28 | #include <linux/module.h> |
| 29 | #include <linux/errno.h> |
| 30 | #include <linux/fs.h> |
| 31 | #include <linux/file.h> |
| 32 | #include <linux/pagemap.h> |
| 33 | #include <linux/stat.h> |
| 34 | #include <linux/string.h> |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 35 | #include <linux/inet.h> |
| 36 | #include <linux/namei.h> |
| 37 | #include <linux/idr.h> |
Alexey Dobriyan | e8edc6e | 2007-05-21 01:22:52 +0400 | [diff] [blame] | 38 | #include <linux/sched.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 39 | #include <linux/slab.h> |
Aneesh Kumar K.V | ebf4626 | 2010-05-31 13:22:56 +0530 | [diff] [blame] | 40 | #include <linux/xattr.h> |
Aneesh Kumar K.V | 85ff872 | 2010-09-28 00:27:39 +0530 | [diff] [blame] | 41 | #include <linux/posix_acl.h> |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 42 | #include <net/9p/9p.h> |
| 43 | #include <net/9p/client.h> |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 44 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 45 | #include "v9fs.h" |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 46 | #include "v9fs_vfs.h" |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 47 | #include "fid.h" |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 48 | #include "cache.h" |
Aneesh Kumar K.V | ebf4626 | 2010-05-31 13:22:56 +0530 | [diff] [blame] | 49 | #include "xattr.h" |
Aneesh Kumar K.V | 85ff872 | 2010-09-28 00:27:39 +0530 | [diff] [blame] | 50 | #include "acl.h" |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 51 | |
Arjan van de Ven | 754661f | 2007-02-12 00:55:38 -0800 | [diff] [blame] | 52 | static const struct inode_operations v9fs_dir_inode_operations; |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 53 | static const struct inode_operations v9fs_dir_inode_operations_dotu; |
Arjan van de Ven | 754661f | 2007-02-12 00:55:38 -0800 | [diff] [blame] | 54 | static const struct inode_operations v9fs_file_inode_operations; |
| 55 | static const struct inode_operations v9fs_symlink_inode_operations; |
Aneesh Kumar K.V | f5fc614 | 2010-10-12 13:02:25 +0530 | [diff] [blame] | 56 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 57 | /** |
| 58 | * unixmode2p9mode - convert unix mode bits to plan 9 |
| 59 | * @v9ses: v9fs session information |
| 60 | * @mode: mode to convert |
| 61 | * |
| 62 | */ |
| 63 | |
Al Viro | 3eda0de | 2011-07-26 02:53:22 -0400 | [diff] [blame] | 64 | static u32 unixmode2p9mode(struct v9fs_session_info *v9ses, umode_t mode) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 65 | { |
| 66 | int res; |
| 67 | res = mode & 0777; |
| 68 | if (S_ISDIR(mode)) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 69 | res |= P9_DMDIR; |
Sripathi Kodi | dd6102f | 2010-03-05 18:48:00 +0000 | [diff] [blame] | 70 | if (v9fs_proto_dotu(v9ses)) { |
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; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 88 | } |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 89 | return res; |
| 90 | } |
| 91 | |
| 92 | /** |
Aneesh Kumar K.V | df345c6 | 2012-01-05 13:39:49 +0530 | [diff] [blame] | 93 | * p9mode2perm- convert plan9 mode bits to unix permission bits |
| 94 | * @v9ses: v9fs session information |
| 95 | * @stat: p9_wstat from which mode need to be derived |
| 96 | * |
| 97 | */ |
| 98 | static int p9mode2perm(struct v9fs_session_info *v9ses, |
| 99 | struct p9_wstat *stat) |
| 100 | { |
| 101 | int res; |
| 102 | int mode = stat->mode; |
| 103 | |
| 104 | res = mode & S_IALLUGO; |
| 105 | if (v9fs_proto_dotu(v9ses)) { |
| 106 | if ((mode & P9_DMSETUID) == P9_DMSETUID) |
| 107 | res |= S_ISUID; |
| 108 | |
| 109 | if ((mode & P9_DMSETGID) == P9_DMSETGID) |
| 110 | res |= S_ISGID; |
| 111 | |
| 112 | if ((mode & P9_DMSETVTX) == P9_DMSETVTX) |
| 113 | res |= S_ISVTX; |
| 114 | } |
| 115 | return res; |
| 116 | } |
| 117 | |
| 118 | /** |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 119 | * p9mode2unixmode- convert plan9 mode bits to unix mode bits |
| 120 | * @v9ses: v9fs session information |
Aneesh Kumar K.V | 4508914 | 2011-07-25 18:06:33 +0000 | [diff] [blame] | 121 | * @stat: p9_wstat from which mode need to be derived |
| 122 | * @rdev: major number, minor number in case of device files. |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 123 | * |
| 124 | */ |
Al Viro | 3eda0de | 2011-07-26 02:53:22 -0400 | [diff] [blame] | 125 | static umode_t p9mode2unixmode(struct v9fs_session_info *v9ses, |
| 126 | struct p9_wstat *stat, dev_t *rdev) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 127 | { |
| 128 | int res; |
Al Viro | 3eda0de | 2011-07-26 02:53:22 -0400 | [diff] [blame] | 129 | u32 mode = stat->mode; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 130 | |
Aneesh Kumar K.V | 4508914 | 2011-07-25 18:06:33 +0000 | [diff] [blame] | 131 | *rdev = 0; |
Aneesh Kumar K.V | df345c6 | 2012-01-05 13:39:49 +0530 | [diff] [blame] | 132 | res = p9mode2perm(v9ses, stat); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 133 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 134 | if ((mode & P9_DMDIR) == P9_DMDIR) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 135 | res |= S_IFDIR; |
Sripathi Kodi | dd6102f | 2010-03-05 18:48:00 +0000 | [diff] [blame] | 136 | else if ((mode & P9_DMSYMLINK) && (v9fs_proto_dotu(v9ses))) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 137 | res |= S_IFLNK; |
Sripathi Kodi | dd6102f | 2010-03-05 18:48:00 +0000 | [diff] [blame] | 138 | else if ((mode & P9_DMSOCKET) && (v9fs_proto_dotu(v9ses)) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 139 | && (v9ses->nodev == 0)) |
| 140 | res |= S_IFSOCK; |
Sripathi Kodi | dd6102f | 2010-03-05 18:48:00 +0000 | [diff] [blame] | 141 | else if ((mode & P9_DMNAMEDPIPE) && (v9fs_proto_dotu(v9ses)) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 142 | && (v9ses->nodev == 0)) |
| 143 | res |= S_IFIFO; |
Sripathi Kodi | dd6102f | 2010-03-05 18:48:00 +0000 | [diff] [blame] | 144 | else if ((mode & P9_DMDEVICE) && (v9fs_proto_dotu(v9ses)) |
Aneesh Kumar K.V | 4508914 | 2011-07-25 18:06:33 +0000 | [diff] [blame] | 145 | && (v9ses->nodev == 0)) { |
| 146 | char type = 0, ext[32]; |
| 147 | int major = -1, minor = -1; |
| 148 | |
Chen Gang | b3f8ab4 | 2013-07-16 15:33:16 +0800 | [diff] [blame] | 149 | strlcpy(ext, stat->extension, sizeof(ext)); |
Aneesh Kumar K.V | 4508914 | 2011-07-25 18:06:33 +0000 | [diff] [blame] | 150 | sscanf(ext, "%c %u %u", &type, &major, &minor); |
| 151 | switch (type) { |
| 152 | case 'c': |
| 153 | res |= S_IFCHR; |
| 154 | break; |
| 155 | case 'b': |
| 156 | res |= S_IFBLK; |
| 157 | break; |
| 158 | default: |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 159 | p9_debug(P9_DEBUG_ERROR, "Unknown special type %c %s\n", |
| 160 | type, stat->extension); |
Aneesh Kumar K.V | 4508914 | 2011-07-25 18:06:33 +0000 | [diff] [blame] | 161 | }; |
| 162 | *rdev = MKDEV(major, minor); |
| 163 | } else |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 164 | res |= S_IFREG; |
| 165 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 166 | return res; |
| 167 | } |
| 168 | |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 169 | /** |
| 170 | * v9fs_uflags2omode- convert posix open flags to plan 9 mode bits |
| 171 | * @uflags: flags to convert |
Eric Van Hensbergen | 2e4bef4 | 2008-06-24 17:39:39 -0500 | [diff] [blame] | 172 | * @extended: if .u extensions are active |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 173 | */ |
| 174 | |
Eric Van Hensbergen | 2e4bef4 | 2008-06-24 17:39:39 -0500 | [diff] [blame] | 175 | int v9fs_uflags2omode(int uflags, int extended) |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 176 | { |
| 177 | int ret; |
| 178 | |
| 179 | ret = 0; |
| 180 | switch (uflags&3) { |
| 181 | default: |
| 182 | case O_RDONLY: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 183 | ret = P9_OREAD; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 184 | break; |
| 185 | |
| 186 | case O_WRONLY: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 187 | ret = P9_OWRITE; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 188 | break; |
| 189 | |
| 190 | case O_RDWR: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 191 | ret = P9_ORDWR; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 192 | break; |
| 193 | } |
| 194 | |
Eric Van Hensbergen | 2e4bef4 | 2008-06-24 17:39:39 -0500 | [diff] [blame] | 195 | if (extended) { |
| 196 | if (uflags & O_EXCL) |
| 197 | ret |= P9_OEXCL; |
| 198 | |
| 199 | if (uflags & O_APPEND) |
| 200 | ret |= P9_OAPPEND; |
| 201 | } |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 202 | |
| 203 | return ret; |
| 204 | } |
| 205 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 206 | /** |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 207 | * v9fs_blank_wstat - helper function to setup a 9P stat structure |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 208 | * @wstat: structure to initialize |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 209 | * |
| 210 | */ |
| 211 | |
M. Mohan Kumar | 7a4439c | 2010-02-08 15:36:48 -0600 | [diff] [blame] | 212 | void |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 213 | v9fs_blank_wstat(struct p9_wstat *wstat) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 214 | { |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 215 | wstat->type = ~0; |
| 216 | wstat->dev = ~0; |
| 217 | wstat->qid.type = ~0; |
| 218 | wstat->qid.version = ~0; |
| 219 | *((long long *)&wstat->qid.path) = ~0; |
| 220 | wstat->mode = ~0; |
| 221 | wstat->atime = ~0; |
| 222 | wstat->mtime = ~0; |
| 223 | wstat->length = ~0; |
| 224 | wstat->name = NULL; |
| 225 | wstat->uid = NULL; |
| 226 | wstat->gid = NULL; |
| 227 | wstat->muid = NULL; |
Eric W. Biederman | 447c509 | 2013-01-29 16:18:50 -0800 | [diff] [blame] | 228 | wstat->n_uid = INVALID_UID; |
| 229 | wstat->n_gid = INVALID_GID; |
| 230 | wstat->n_muid = INVALID_UID; |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 231 | wstat->extension = NULL; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 232 | } |
| 233 | |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 234 | /** |
| 235 | * v9fs_alloc_inode - helper function to allocate an inode |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 236 | * |
| 237 | */ |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 238 | struct inode *v9fs_alloc_inode(struct super_block *sb) |
| 239 | { |
Aneesh Kumar K.V | a78ce05 | 2011-02-28 17:04:02 +0530 | [diff] [blame] | 240 | struct v9fs_inode *v9inode; |
| 241 | v9inode = (struct v9fs_inode *)kmem_cache_alloc(v9fs_inode_cache, |
| 242 | GFP_KERNEL); |
| 243 | if (!v9inode) |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 244 | return NULL; |
Aneesh Kumar K.V | a78ce05 | 2011-02-28 17:04:02 +0530 | [diff] [blame] | 245 | #ifdef CONFIG_9P_FSCACHE |
| 246 | v9inode->fscache = NULL; |
Aneesh Kumar K.V | a78ce05 | 2011-02-28 17:04:02 +0530 | [diff] [blame] | 247 | spin_lock_init(&v9inode->fscache_lock); |
| 248 | #endif |
Aneesh Kumar K.V | 6b39f6d | 2011-02-28 17:04:03 +0530 | [diff] [blame] | 249 | v9inode->writeback_fid = NULL; |
Aneesh Kumar K.V | b3cbea0 | 2011-02-28 17:04:06 +0530 | [diff] [blame] | 250 | v9inode->cache_validity = 0; |
Aneesh Kumar K.V | 5a7e0a8 | 2011-03-08 16:39:46 +0530 | [diff] [blame] | 251 | mutex_init(&v9inode->v_mutex); |
Aneesh Kumar K.V | a78ce05 | 2011-02-28 17:04:02 +0530 | [diff] [blame] | 252 | return &v9inode->vfs_inode; |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 253 | } |
| 254 | |
| 255 | /** |
| 256 | * v9fs_destroy_inode - destroy an inode |
| 257 | * |
| 258 | */ |
| 259 | |
Nick Piggin | fa0d7e3d | 2011-01-07 17:49:49 +1100 | [diff] [blame] | 260 | static void v9fs_i_callback(struct rcu_head *head) |
| 261 | { |
| 262 | struct inode *inode = container_of(head, struct inode, i_rcu); |
Aneesh Kumar K.V | a78ce05 | 2011-02-28 17:04:02 +0530 | [diff] [blame] | 263 | kmem_cache_free(v9fs_inode_cache, V9FS_I(inode)); |
Nick Piggin | fa0d7e3d | 2011-01-07 17:49:49 +1100 | [diff] [blame] | 264 | } |
| 265 | |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 266 | void v9fs_destroy_inode(struct inode *inode) |
| 267 | { |
Nick Piggin | fa0d7e3d | 2011-01-07 17:49:49 +1100 | [diff] [blame] | 268 | call_rcu(&inode->i_rcu, v9fs_i_callback); |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 269 | } |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 270 | |
Aneesh Kumar K.V | 5ffc0cb | 2011-02-28 17:04:01 +0530 | [diff] [blame] | 271 | int v9fs_init_inode(struct v9fs_session_info *v9ses, |
Al Viro | 3eda0de | 2011-07-26 02:53:22 -0400 | [diff] [blame] | 272 | struct inode *inode, umode_t mode, dev_t rdev) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 273 | { |
Aneesh Kumar K.V | 5ffc0cb | 2011-02-28 17:04:01 +0530 | [diff] [blame] | 274 | int err = 0; |
Abhishek Kulkarni | 2bb5411 | 2009-07-19 13:41:56 -0600 | [diff] [blame] | 275 | |
Dmitry Monakhov | 217f206 | 2010-03-04 17:30:57 +0300 | [diff] [blame] | 276 | inode_init_owner(inode, NULL, mode); |
Abhishek Kulkarni | 2bb5411 | 2009-07-19 13:41:56 -0600 | [diff] [blame] | 277 | inode->i_blocks = 0; |
Aneesh Kumar K.V | 4508914 | 2011-07-25 18:06:33 +0000 | [diff] [blame] | 278 | inode->i_rdev = rdev; |
Abhishek Kulkarni | 2bb5411 | 2009-07-19 13:41:56 -0600 | [diff] [blame] | 279 | inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; |
| 280 | inode->i_mapping->a_ops = &v9fs_addr_operations; |
| 281 | |
| 282 | switch (mode & S_IFMT) { |
| 283 | case S_IFIFO: |
| 284 | case S_IFBLK: |
| 285 | case S_IFCHR: |
| 286 | case S_IFSOCK: |
M. Mohan Kumar | 4b43516 | 2010-06-16 14:27:01 +0530 | [diff] [blame] | 287 | if (v9fs_proto_dotl(v9ses)) { |
| 288 | inode->i_op = &v9fs_file_inode_operations_dotl; |
M. Mohan Kumar | 4b43516 | 2010-06-16 14:27:01 +0530 | [diff] [blame] | 289 | } else if (v9fs_proto_dotu(v9ses)) { |
| 290 | inode->i_op = &v9fs_file_inode_operations; |
M. Mohan Kumar | 4b43516 | 2010-06-16 14:27:01 +0530 | [diff] [blame] | 291 | } else { |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 292 | p9_debug(P9_DEBUG_ERROR, |
| 293 | "special files without extended mode\n"); |
Abhishek Kulkarni | 2bb5411 | 2009-07-19 13:41:56 -0600 | [diff] [blame] | 294 | err = -EINVAL; |
| 295 | goto error; |
| 296 | } |
| 297 | init_special_inode(inode, inode->i_mode, inode->i_rdev); |
| 298 | break; |
| 299 | case S_IFREG: |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 300 | if (v9fs_proto_dotl(v9ses)) { |
| 301 | inode->i_op = &v9fs_file_inode_operations_dotl; |
Aneesh Kumar K.V | 29236f4 | 2011-02-28 17:03:54 +0530 | [diff] [blame] | 302 | if (v9ses->cache) |
| 303 | inode->i_fop = |
| 304 | &v9fs_cached_file_operations_dotl; |
| 305 | else |
| 306 | inode->i_fop = &v9fs_file_operations_dotl; |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 307 | } else { |
| 308 | inode->i_op = &v9fs_file_inode_operations; |
Aneesh Kumar K.V | 29236f4 | 2011-02-28 17:03:54 +0530 | [diff] [blame] | 309 | if (v9ses->cache) |
| 310 | inode->i_fop = &v9fs_cached_file_operations; |
| 311 | else |
| 312 | inode->i_fop = &v9fs_file_operations; |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 313 | } |
| 314 | |
Abhishek Kulkarni | 2bb5411 | 2009-07-19 13:41:56 -0600 | [diff] [blame] | 315 | break; |
| 316 | case S_IFLNK: |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 317 | if (!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses)) { |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 318 | p9_debug(P9_DEBUG_ERROR, |
| 319 | "extended modes used with legacy protocol\n"); |
Abhishek Kulkarni | 2bb5411 | 2009-07-19 13:41:56 -0600 | [diff] [blame] | 320 | err = -EINVAL; |
| 321 | goto error; |
| 322 | } |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 323 | |
| 324 | if (v9fs_proto_dotl(v9ses)) |
| 325 | inode->i_op = &v9fs_symlink_inode_operations_dotl; |
| 326 | else |
| 327 | inode->i_op = &v9fs_symlink_inode_operations; |
| 328 | |
Abhishek Kulkarni | 2bb5411 | 2009-07-19 13:41:56 -0600 | [diff] [blame] | 329 | break; |
| 330 | case S_IFDIR: |
| 331 | inc_nlink(inode); |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 332 | if (v9fs_proto_dotl(v9ses)) |
| 333 | inode->i_op = &v9fs_dir_inode_operations_dotl; |
| 334 | else if (v9fs_proto_dotu(v9ses)) |
| 335 | inode->i_op = &v9fs_dir_inode_operations_dotu; |
Abhishek Kulkarni | 2bb5411 | 2009-07-19 13:41:56 -0600 | [diff] [blame] | 336 | else |
| 337 | inode->i_op = &v9fs_dir_inode_operations; |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 338 | |
| 339 | if (v9fs_proto_dotl(v9ses)) |
| 340 | inode->i_fop = &v9fs_dir_operations_dotl; |
| 341 | else |
| 342 | inode->i_fop = &v9fs_dir_operations; |
| 343 | |
Abhishek Kulkarni | 2bb5411 | 2009-07-19 13:41:56 -0600 | [diff] [blame] | 344 | break; |
| 345 | default: |
Linus Torvalds | 609eac1 | 2012-01-10 15:09:01 -0800 | [diff] [blame] | 346 | p9_debug(P9_DEBUG_ERROR, "BAD mode 0x%hx S_IFMT 0x%x\n", |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 347 | mode, mode & S_IFMT); |
Abhishek Kulkarni | 2bb5411 | 2009-07-19 13:41:56 -0600 | [diff] [blame] | 348 | err = -EINVAL; |
| 349 | goto error; |
| 350 | } |
Abhishek Kulkarni | 2bb5411 | 2009-07-19 13:41:56 -0600 | [diff] [blame] | 351 | error: |
Aneesh Kumar K.V | 5ffc0cb | 2011-02-28 17:04:01 +0530 | [diff] [blame] | 352 | return err; |
| 353 | |
| 354 | } |
| 355 | |
| 356 | /** |
| 357 | * v9fs_get_inode - helper function to setup an inode |
| 358 | * @sb: superblock |
| 359 | * @mode: mode to setup inode with |
| 360 | * |
| 361 | */ |
| 362 | |
Al Viro | 3eda0de | 2011-07-26 02:53:22 -0400 | [diff] [blame] | 363 | struct inode *v9fs_get_inode(struct super_block *sb, umode_t mode, dev_t rdev) |
Aneesh Kumar K.V | 5ffc0cb | 2011-02-28 17:04:01 +0530 | [diff] [blame] | 364 | { |
| 365 | int err; |
| 366 | struct inode *inode; |
| 367 | struct v9fs_session_info *v9ses = sb->s_fs_info; |
| 368 | |
Linus Torvalds | 609eac1 | 2012-01-10 15:09:01 -0800 | [diff] [blame] | 369 | p9_debug(P9_DEBUG_VFS, "super block: %p mode: %ho\n", sb, mode); |
Aneesh Kumar K.V | 5ffc0cb | 2011-02-28 17:04:01 +0530 | [diff] [blame] | 370 | |
| 371 | inode = new_inode(sb); |
| 372 | if (!inode) { |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 373 | pr_warn("%s (%d): Problem allocating inode\n", |
| 374 | __func__, task_pid_nr(current)); |
Aneesh Kumar K.V | 5ffc0cb | 2011-02-28 17:04:01 +0530 | [diff] [blame] | 375 | return ERR_PTR(-ENOMEM); |
| 376 | } |
Aneesh Kumar K.V | 4508914 | 2011-07-25 18:06:33 +0000 | [diff] [blame] | 377 | err = v9fs_init_inode(v9ses, inode, mode, rdev); |
Aneesh Kumar K.V | 5ffc0cb | 2011-02-28 17:04:01 +0530 | [diff] [blame] | 378 | if (err) { |
| 379 | iput(inode); |
| 380 | return ERR_PTR(err); |
| 381 | } |
| 382 | return inode; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 383 | } |
| 384 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 385 | /* |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 386 | static struct v9fs_fid* |
| 387 | v9fs_clone_walk(struct v9fs_session_info *v9ses, u32 fid, struct dentry *dentry) |
| 388 | { |
| 389 | int err; |
Mika Kukkonen | 736c4b8 | 2006-12-06 20:36:29 -0800 | [diff] [blame] | 390 | int nfid; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 391 | struct v9fs_fid *ret; |
| 392 | struct v9fs_fcall *fcall; |
| 393 | |
| 394 | nfid = v9fs_get_idpool(&v9ses->fidpool); |
| 395 | if (nfid < 0) { |
| 396 | eprintk(KERN_WARNING, "no free fids available\n"); |
Latchesar Ionkov | 731805b | 2006-03-07 21:55:42 -0800 | [diff] [blame] | 397 | return ERR_PTR(-ENOSPC); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 398 | } |
| 399 | |
| 400 | err = v9fs_t_walk(v9ses, fid, nfid, (char *) dentry->d_name.name, |
| 401 | &fcall); |
| 402 | |
| 403 | if (err < 0) { |
Latchesar Ionkov | 41e5a6a | 2006-05-15 09:44:21 -0700 | [diff] [blame] | 404 | if (fcall && fcall->id == RWALK) |
| 405 | goto clunk_fid; |
| 406 | |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 407 | PRINT_FCALL_ERROR("walk error", fcall); |
| 408 | v9fs_put_idpool(nfid, &v9ses->fidpool); |
| 409 | goto error; |
| 410 | } |
| 411 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 412 | kfree(fcall); |
Latchesar Ionkov | 3cf6429 | 2006-01-08 01:04:58 -0800 | [diff] [blame] | 413 | fcall = NULL; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 414 | ret = v9fs_fid_create(v9ses, nfid); |
| 415 | if (!ret) { |
| 416 | err = -ENOMEM; |
| 417 | goto clunk_fid; |
| 418 | } |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 419 | |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 420 | err = v9fs_fid_insert(ret, dentry); |
| 421 | if (err < 0) { |
| 422 | v9fs_fid_destroy(ret); |
| 423 | goto clunk_fid; |
Latchesar Ionkov | 0b8dd17 | 2005-09-27 21:45:24 -0700 | [diff] [blame] | 424 | } |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 425 | |
| 426 | return ret; |
| 427 | |
| 428 | clunk_fid: |
| 429 | v9fs_t_clunk(v9ses, nfid); |
| 430 | |
| 431 | error: |
| 432 | kfree(fcall); |
| 433 | return ERR_PTR(err); |
| 434 | } |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 435 | */ |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 436 | |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 437 | |
| 438 | /** |
| 439 | * v9fs_clear_inode - release an inode |
| 440 | * @inode: inode to release |
| 441 | * |
| 442 | */ |
Al Viro | b57922d | 2010-06-07 14:34:48 -0400 | [diff] [blame] | 443 | void v9fs_evict_inode(struct inode *inode) |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 444 | { |
Aneesh Kumar K.V | 6b39f6d | 2011-02-28 17:04:03 +0530 | [diff] [blame] | 445 | struct v9fs_inode *v9inode = V9FS_I(inode); |
| 446 | |
Al Viro | b57922d | 2010-06-07 14:34:48 -0400 | [diff] [blame] | 447 | truncate_inode_pages(inode->i_mapping, 0); |
Jan Kara | dbd5768 | 2012-05-03 14:48:02 +0200 | [diff] [blame] | 448 | clear_inode(inode); |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 449 | filemap_fdatawrite(inode->i_mapping); |
| 450 | |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 451 | v9fs_cache_inode_put_cookie(inode); |
Aneesh Kumar K.V | 6b39f6d | 2011-02-28 17:04:03 +0530 | [diff] [blame] | 452 | /* clunk the fid stashed in writeback_fid */ |
| 453 | if (v9inode->writeback_fid) { |
| 454 | p9_client_clunk(v9inode->writeback_fid); |
| 455 | v9inode->writeback_fid = NULL; |
Aneesh Kumar K.V | 3cf387d | 2011-02-28 17:03:57 +0530 | [diff] [blame] | 456 | } |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 457 | } |
| 458 | |
Aneesh Kumar K.V | fd2421f | 2011-07-11 16:40:59 +0000 | [diff] [blame] | 459 | static int v9fs_test_inode(struct inode *inode, void *data) |
| 460 | { |
| 461 | int umode; |
Aneesh Kumar K.V | 4508914 | 2011-07-25 18:06:33 +0000 | [diff] [blame] | 462 | dev_t rdev; |
Aneesh Kumar K.V | fd2421f | 2011-07-11 16:40:59 +0000 | [diff] [blame] | 463 | struct v9fs_inode *v9inode = V9FS_I(inode); |
| 464 | struct p9_wstat *st = (struct p9_wstat *)data; |
| 465 | struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode); |
| 466 | |
Aneesh Kumar K.V | 4508914 | 2011-07-25 18:06:33 +0000 | [diff] [blame] | 467 | umode = p9mode2unixmode(v9ses, st, &rdev); |
Aneesh Kumar K.V | fd2421f | 2011-07-11 16:40:59 +0000 | [diff] [blame] | 468 | /* don't match inode of different type */ |
| 469 | if ((inode->i_mode & S_IFMT) != (umode & S_IFMT)) |
| 470 | return 0; |
| 471 | |
| 472 | /* compare qid details */ |
| 473 | if (memcmp(&v9inode->qid.version, |
| 474 | &st->qid.version, sizeof(v9inode->qid.version))) |
| 475 | return 0; |
| 476 | |
| 477 | if (v9inode->qid.type != st->qid.type) |
| 478 | return 0; |
| 479 | return 1; |
| 480 | } |
| 481 | |
Aneesh Kumar K.V | ed80fcf | 2011-07-06 16:32:31 +0530 | [diff] [blame] | 482 | static int v9fs_test_new_inode(struct inode *inode, void *data) |
| 483 | { |
| 484 | return 0; |
| 485 | } |
| 486 | |
Aneesh Kumar K.V | fd2421f | 2011-07-11 16:40:59 +0000 | [diff] [blame] | 487 | static int v9fs_set_inode(struct inode *inode, void *data) |
| 488 | { |
| 489 | struct v9fs_inode *v9inode = V9FS_I(inode); |
| 490 | struct p9_wstat *st = (struct p9_wstat *)data; |
| 491 | |
| 492 | memcpy(&v9inode->qid, &st->qid, sizeof(st->qid)); |
| 493 | return 0; |
| 494 | } |
| 495 | |
Aneesh Kumar K.V | 5ffc0cb | 2011-02-28 17:04:01 +0530 | [diff] [blame] | 496 | static struct inode *v9fs_qid_iget(struct super_block *sb, |
| 497 | struct p9_qid *qid, |
Aneesh Kumar K.V | ed80fcf | 2011-07-06 16:32:31 +0530 | [diff] [blame] | 498 | struct p9_wstat *st, |
| 499 | int new) |
Aneesh Kumar K.V | 5ffc0cb | 2011-02-28 17:04:01 +0530 | [diff] [blame] | 500 | { |
Aneesh Kumar K.V | 4508914 | 2011-07-25 18:06:33 +0000 | [diff] [blame] | 501 | dev_t rdev; |
Al Viro | 3eda0de | 2011-07-26 02:53:22 -0400 | [diff] [blame] | 502 | int retval; |
| 503 | umode_t umode; |
Aneesh Kumar K.V | 5ffc0cb | 2011-02-28 17:04:01 +0530 | [diff] [blame] | 504 | unsigned long i_ino; |
| 505 | struct inode *inode; |
| 506 | struct v9fs_session_info *v9ses = sb->s_fs_info; |
Aneesh Kumar K.V | ed80fcf | 2011-07-06 16:32:31 +0530 | [diff] [blame] | 507 | int (*test)(struct inode *, void *); |
| 508 | |
| 509 | if (new) |
| 510 | test = v9fs_test_new_inode; |
| 511 | else |
| 512 | test = v9fs_test_inode; |
Aneesh Kumar K.V | 5ffc0cb | 2011-02-28 17:04:01 +0530 | [diff] [blame] | 513 | |
| 514 | i_ino = v9fs_qid2ino(qid); |
Aneesh Kumar K.V | ed80fcf | 2011-07-06 16:32:31 +0530 | [diff] [blame] | 515 | 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] | 516 | if (!inode) |
| 517 | return ERR_PTR(-ENOMEM); |
| 518 | if (!(inode->i_state & I_NEW)) |
| 519 | return inode; |
| 520 | /* |
| 521 | * initialize the inode with the stat info |
| 522 | * FIXME!! we may need support for stale inodes |
| 523 | * later. |
| 524 | */ |
Aneesh Kumar K.V | fd2421f | 2011-07-11 16:40:59 +0000 | [diff] [blame] | 525 | inode->i_ino = i_ino; |
Aneesh Kumar K.V | 4508914 | 2011-07-25 18:06:33 +0000 | [diff] [blame] | 526 | umode = p9mode2unixmode(v9ses, st, &rdev); |
| 527 | retval = v9fs_init_inode(v9ses, inode, umode, rdev); |
Aneesh Kumar K.V | 5ffc0cb | 2011-02-28 17:04:01 +0530 | [diff] [blame] | 528 | if (retval) |
| 529 | goto error; |
| 530 | |
| 531 | v9fs_stat2inode(st, inode, sb); |
Aneesh Kumar K.V | 5ffc0cb | 2011-02-28 17:04:01 +0530 | [diff] [blame] | 532 | v9fs_cache_inode_get_cookie(inode); |
Aneesh Kumar K.V | 5ffc0cb | 2011-02-28 17:04:01 +0530 | [diff] [blame] | 533 | unlock_new_inode(inode); |
| 534 | return inode; |
| 535 | error: |
| 536 | unlock_new_inode(inode); |
| 537 | iput(inode); |
| 538 | return ERR_PTR(retval); |
| 539 | |
| 540 | } |
| 541 | |
Aneesh Kumar K.V | 53c06f4 | 2011-01-10 13:51:47 -0600 | [diff] [blame] | 542 | struct inode * |
Aneesh Kumar K.V | a78ce05 | 2011-02-28 17:04:02 +0530 | [diff] [blame] | 543 | 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] | 544 | struct super_block *sb, int new) |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 545 | { |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 546 | struct p9_wstat *st; |
Aneesh Kumar K.V | 5ffc0cb | 2011-02-28 17:04:01 +0530 | [diff] [blame] | 547 | struct inode *inode = NULL; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 548 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 549 | st = p9_client_stat(fid); |
Abhishek Kulkarni | 02bc356 | 2009-07-19 13:41:54 -0600 | [diff] [blame] | 550 | if (IS_ERR(st)) |
| 551 | return ERR_CAST(st); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 552 | |
Aneesh Kumar K.V | ed80fcf | 2011-07-06 16:32:31 +0530 | [diff] [blame] | 553 | inode = v9fs_qid_iget(sb, &st->qid, st, new); |
Abhishek Kulkarni | 02bc356 | 2009-07-19 13:41:54 -0600 | [diff] [blame] | 554 | p9stat_free(st); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 555 | kfree(st); |
Aneesh Kumar K.V | 5ffc0cb | 2011-02-28 17:04:01 +0530 | [diff] [blame] | 556 | return inode; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 557 | } |
| 558 | |
| 559 | /** |
Aneesh Kumar K.V | f88657c | 2011-08-03 19:55:32 +0530 | [diff] [blame] | 560 | * v9fs_at_to_dotl_flags- convert Linux specific AT flags to |
| 561 | * plan 9 AT flag. |
| 562 | * @flags: flags to convert |
| 563 | */ |
| 564 | static int v9fs_at_to_dotl_flags(int flags) |
| 565 | { |
| 566 | int rflags = 0; |
| 567 | if (flags & AT_REMOVEDIR) |
| 568 | rflags |= P9_DOTL_AT_REMOVEDIR; |
| 569 | return rflags; |
| 570 | } |
| 571 | |
| 572 | /** |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 573 | * v9fs_remove - helper function to remove files and directories |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 574 | * @dir: directory inode that is being deleted |
Aneesh Kumar K.V | 48e370f | 2011-06-28 15:41:18 +0530 | [diff] [blame] | 575 | * @dentry: dentry that is being deleted |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 576 | * @rmdir: removing a directory |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 577 | * |
| 578 | */ |
| 579 | |
Aneesh Kumar K.V | 48e370f | 2011-06-28 15:41:18 +0530 | [diff] [blame] | 580 | 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] | 581 | { |
Aneesh Kumar K.V | 48e370f | 2011-06-28 15:41:18 +0530 | [diff] [blame] | 582 | struct inode *inode; |
| 583 | int retval = -EOPNOTSUPP; |
| 584 | struct p9_fid *v9fid, *dfid; |
| 585 | struct v9fs_session_info *v9ses; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 586 | |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 587 | p9_debug(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %x\n", |
| 588 | dir, dentry, flags); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 589 | |
Aneesh Kumar K.V | 48e370f | 2011-06-28 15:41:18 +0530 | [diff] [blame] | 590 | v9ses = v9fs_inode2v9ses(dir); |
| 591 | inode = dentry->d_inode; |
| 592 | dfid = v9fs_fid_lookup(dentry->d_parent); |
| 593 | if (IS_ERR(dfid)) { |
| 594 | retval = PTR_ERR(dfid); |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 595 | p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", retval); |
Aneesh Kumar K.V | 48e370f | 2011-06-28 15:41:18 +0530 | [diff] [blame] | 596 | return retval; |
| 597 | } |
| 598 | if (v9fs_proto_dotl(v9ses)) |
Aneesh Kumar K.V | f88657c | 2011-08-03 19:55:32 +0530 | [diff] [blame] | 599 | retval = p9_client_unlinkat(dfid, dentry->d_name.name, |
| 600 | v9fs_at_to_dotl_flags(flags)); |
Aneesh Kumar K.V | 48e370f | 2011-06-28 15:41:18 +0530 | [diff] [blame] | 601 | if (retval == -EOPNOTSUPP) { |
| 602 | /* Try the one based on path */ |
| 603 | v9fid = v9fs_fid_clone(dentry); |
| 604 | if (IS_ERR(v9fid)) |
| 605 | return PTR_ERR(v9fid); |
| 606 | retval = p9_client_remove(v9fid); |
| 607 | } |
Aneesh Kumar K.V | b271ec4 | 2011-02-28 17:04:05 +0530 | [diff] [blame] | 608 | if (!retval) { |
| 609 | /* |
| 610 | * directories on unlink should have zero |
| 611 | * link count |
| 612 | */ |
Aneesh Kumar K.V | 48e370f | 2011-06-28 15:41:18 +0530 | [diff] [blame] | 613 | if (flags & AT_REMOVEDIR) { |
| 614 | clear_nlink(inode); |
Aneesh Kumar K.V | b271ec4 | 2011-02-28 17:04:05 +0530 | [diff] [blame] | 615 | drop_nlink(dir); |
| 616 | } else |
Aneesh Kumar K.V | 48e370f | 2011-06-28 15:41:18 +0530 | [diff] [blame] | 617 | drop_nlink(inode); |
Aneesh Kumar K.V | d28c61f | 2011-02-28 17:04:08 +0530 | [diff] [blame] | 618 | |
Aneesh Kumar K.V | 48e370f | 2011-06-28 15:41:18 +0530 | [diff] [blame] | 619 | v9fs_invalidate_inode_attr(inode); |
Aneesh Kumar K.V | d28c61f | 2011-02-28 17:04:08 +0530 | [diff] [blame] | 620 | v9fs_invalidate_inode_attr(dir); |
Aneesh Kumar K.V | b271ec4 | 2011-02-28 17:04:05 +0530 | [diff] [blame] | 621 | } |
Aneesh Kumar K.V | d994f40 | 2010-03-29 18:14:50 -0500 | [diff] [blame] | 622 | return retval; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 623 | } |
| 624 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 625 | /** |
| 626 | * v9fs_create - Create a file |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 627 | * @v9ses: session information |
| 628 | * @dir: directory that dentry is being created in |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 629 | * @dentry: dentry that is being created |
Abhishek Kulkarni | 0e15597 | 2009-07-19 13:41:55 -0600 | [diff] [blame] | 630 | * @extension: 9p2000.u extension string to support devices, etc. |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 631 | * @perm: create permissions |
| 632 | * @mode: open mode |
| 633 | * |
| 634 | */ |
| 635 | static struct p9_fid * |
| 636 | v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir, |
| 637 | struct dentry *dentry, char *extension, u32 perm, u8 mode) |
| 638 | { |
| 639 | int err; |
| 640 | char *name; |
| 641 | struct p9_fid *dfid, *ofid, *fid; |
| 642 | struct inode *inode; |
| 643 | |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 644 | p9_debug(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 645 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 646 | err = 0; |
| 647 | ofid = NULL; |
| 648 | fid = NULL; |
| 649 | name = (char *) dentry->d_name.name; |
Venkateswararao Jujjuri | 6d27e64 | 2010-05-10 18:08:28 +0000 | [diff] [blame] | 650 | dfid = v9fs_fid_lookup(dentry->d_parent); |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 651 | if (IS_ERR(dfid)) { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 652 | err = PTR_ERR(dfid); |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 653 | p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err); |
Venkateswararao Jujjuri | 6d27e64 | 2010-05-10 18:08:28 +0000 | [diff] [blame] | 654 | return ERR_PTR(err); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 655 | } |
| 656 | |
| 657 | /* clone a fid to use for creation */ |
| 658 | ofid = p9_client_walk(dfid, 0, NULL, 1); |
| 659 | if (IS_ERR(ofid)) { |
| 660 | err = PTR_ERR(ofid); |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 661 | p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); |
Venkateswararao Jujjuri | 6d27e64 | 2010-05-10 18:08:28 +0000 | [diff] [blame] | 662 | return ERR_PTR(err); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 663 | } |
| 664 | |
| 665 | err = p9_client_fcreate(ofid, name, perm, mode, extension); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 666 | if (err < 0) { |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 667 | p9_debug(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 668 | goto error; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 669 | } |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 670 | |
Aneesh Kumar K.V | b605479 | 2012-01-05 10:42:17 -0600 | [diff] [blame] | 671 | if (!(perm & P9_DMLINK)) { |
| 672 | /* now walk from the parent so we can get unopened fid */ |
| 673 | fid = p9_client_walk(dfid, 1, &name, 1); |
| 674 | if (IS_ERR(fid)) { |
| 675 | err = PTR_ERR(fid); |
| 676 | p9_debug(P9_DEBUG_VFS, |
| 677 | "p9_client_walk failed %d\n", err); |
| 678 | fid = NULL; |
| 679 | goto error; |
| 680 | } |
| 681 | /* |
| 682 | * instantiate inode and assign the unopened fid to the dentry |
| 683 | */ |
| 684 | inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); |
| 685 | if (IS_ERR(inode)) { |
| 686 | err = PTR_ERR(inode); |
| 687 | p9_debug(P9_DEBUG_VFS, |
| 688 | "inode creation failed %d\n", err); |
| 689 | goto error; |
| 690 | } |
Al Viro | 2ea03e1d | 2013-02-28 01:18:14 -0500 | [diff] [blame] | 691 | v9fs_fid_add(dentry, fid); |
Aneesh Kumar K.V | b605479 | 2012-01-05 10:42:17 -0600 | [diff] [blame] | 692 | d_instantiate(dentry, inode); |
Venkateswararao Jujjuri | 6d27e64 | 2010-05-10 18:08:28 +0000 | [diff] [blame] | 693 | } |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 694 | return ofid; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 695 | error: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 696 | if (ofid) |
| 697 | p9_client_clunk(ofid); |
| 698 | |
| 699 | if (fid) |
| 700 | p9_client_clunk(fid); |
| 701 | |
| 702 | return ERR_PTR(err); |
| 703 | } |
| 704 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 705 | /** |
Miklos Szeredi | e43ae79 | 2012-06-05 15:10:26 +0200 | [diff] [blame] | 706 | * v9fs_vfs_create - VFS hook to create a regular file |
| 707 | * |
| 708 | * open(.., O_CREAT) is handled in v9fs_vfs_atomic_open(). This is only called |
| 709 | * for mknod(2). |
| 710 | * |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 711 | * @dir: directory inode that is being created |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 712 | * @dentry: dentry that is being deleted |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 713 | * @mode: create permissions |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 714 | * |
| 715 | */ |
| 716 | |
| 717 | static int |
Al Viro | 4acdaf2 | 2011-07-26 01:42:34 -0400 | [diff] [blame] | 718 | v9fs_vfs_create(struct inode *dir, struct dentry *dentry, umode_t mode, |
Al Viro | ebfc3b4 | 2012-06-10 18:05:36 -0400 | [diff] [blame] | 719 | bool excl) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 720 | { |
Miklos Szeredi | e43ae79 | 2012-06-05 15:10:26 +0200 | [diff] [blame] | 721 | struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); |
| 722 | u32 perm = unixmode2p9mode(v9ses, mode); |
| 723 | struct p9_fid *fid; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 724 | |
Miklos Szeredi | e43ae79 | 2012-06-05 15:10:26 +0200 | [diff] [blame] | 725 | /* P9_OEXCL? */ |
| 726 | fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_ORDWR); |
| 727 | if (IS_ERR(fid)) |
| 728 | return PTR_ERR(fid); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 729 | |
Aneesh Kumar K.V | d28c61f | 2011-02-28 17:04:08 +0530 | [diff] [blame] | 730 | v9fs_invalidate_inode_attr(dir); |
Miklos Szeredi | e43ae79 | 2012-06-05 15:10:26 +0200 | [diff] [blame] | 731 | p9_client_clunk(fid); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 732 | |
| 733 | return 0; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 734 | } |
| 735 | |
| 736 | /** |
| 737 | * v9fs_vfs_mkdir - VFS mkdir hook to create a directory |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 738 | * @dir: inode that is being unlinked |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 739 | * @dentry: dentry that is being unlinked |
| 740 | * @mode: mode for new directory |
| 741 | * |
| 742 | */ |
| 743 | |
Al Viro | 18bb1db | 2011-07-26 01:41:39 -0400 | [diff] [blame] | 744 | static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 745 | { |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 746 | int err; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 747 | u32 perm; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 748 | struct p9_fid *fid; |
Aneesh Kumar K.V | d28c61f | 2011-02-28 17:04:08 +0530 | [diff] [blame] | 749 | struct v9fs_session_info *v9ses; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 750 | |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 751 | p9_debug(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 752 | err = 0; |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 753 | v9ses = v9fs_inode2v9ses(dir); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 754 | perm = unixmode2p9mode(v9ses, mode | S_IFDIR); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 755 | fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD); |
| 756 | if (IS_ERR(fid)) { |
| 757 | err = PTR_ERR(fid); |
| 758 | fid = NULL; |
Aneesh Kumar K.V | d28c61f | 2011-02-28 17:04:08 +0530 | [diff] [blame] | 759 | } else { |
Aneesh Kumar K.V | b271ec4 | 2011-02-28 17:04:05 +0530 | [diff] [blame] | 760 | inc_nlink(dir); |
Aneesh Kumar K.V | d28c61f | 2011-02-28 17:04:08 +0530 | [diff] [blame] | 761 | v9fs_invalidate_inode_attr(dir); |
| 762 | } |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 763 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 764 | if (fid) |
| 765 | p9_client_clunk(fid); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 766 | |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 767 | return err; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 768 | } |
| 769 | |
| 770 | /** |
| 771 | * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode |
| 772 | * @dir: inode that is being walked from |
| 773 | * @dentry: dentry that is being walked to? |
| 774 | * @nameidata: path data |
| 775 | * |
| 776 | */ |
| 777 | |
Aneesh Kumar K.V | 53c06f4 | 2011-01-10 13:51:47 -0600 | [diff] [blame] | 778 | struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, |
Al Viro | 00cd8dd | 2012-06-10 17:13:09 -0400 | [diff] [blame] | 779 | unsigned int flags) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 780 | { |
Aneesh Kumar K.V | 73f5071 | 2011-08-16 22:19:28 +0530 | [diff] [blame] | 781 | struct dentry *res; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 782 | struct v9fs_session_info *v9ses; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 783 | struct p9_fid *dfid, *fid; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 784 | struct inode *inode; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 785 | char *name; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 786 | |
Al Viro | 00cd8dd | 2012-06-10 17:13:09 -0400 | [diff] [blame] | 787 | p9_debug(P9_DEBUG_VFS, "dir: %p dentry: (%s) %p flags: %x\n", |
| 788 | dir, dentry->d_name.name, dentry, flags); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 789 | |
Sripathi Kodi | 11e9b49 | 2010-03-29 18:13:59 -0500 | [diff] [blame] | 790 | if (dentry->d_name.len > NAME_MAX) |
| 791 | return ERR_PTR(-ENAMETOOLONG); |
| 792 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 793 | v9ses = v9fs_inode2v9ses(dir); |
Aneesh Kumar K.V | a534c8d | 2010-06-30 19:18:50 +0530 | [diff] [blame] | 794 | /* We can walk d_parent because we hold the dir->i_mutex */ |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 795 | dfid = v9fs_fid_lookup(dentry->d_parent); |
| 796 | if (IS_ERR(dfid)) |
David Howells | e231c2e | 2008-02-07 00:15:26 -0800 | [diff] [blame] | 797 | return ERR_CAST(dfid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 798 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 799 | name = (char *) dentry->d_name.name; |
| 800 | fid = p9_client_walk(dfid, 1, &name, 1); |
| 801 | if (IS_ERR(fid)) { |
Al Viro | 7b5be62 | 2013-02-28 01:28:21 -0500 | [diff] [blame] | 802 | if (fid == ERR_PTR(-ENOENT)) { |
| 803 | d_add(dentry, NULL); |
| 804 | return NULL; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 805 | } |
Al Viro | 7b5be62 | 2013-02-28 01:28:21 -0500 | [diff] [blame] | 806 | return ERR_CAST(fid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 807 | } |
Aneesh Kumar K.V | 73f5071 | 2011-08-16 22:19:28 +0530 | [diff] [blame] | 808 | /* |
| 809 | * Make sure we don't use a wrong inode due to parallel |
| 810 | * unlink. For cached mode create calls request for new |
| 811 | * inode. But with cache disabled, lookup should do this. |
| 812 | */ |
| 813 | if (v9ses->cache) |
| 814 | inode = v9fs_get_inode_from_fid(v9ses, fid, dir->i_sb); |
| 815 | else |
| 816 | inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 817 | if (IS_ERR(inode)) { |
Al Viro | 7b5be62 | 2013-02-28 01:28:21 -0500 | [diff] [blame] | 818 | p9_client_clunk(fid); |
| 819 | return ERR_CAST(inode); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 820 | } |
Aneesh Kumar K.V | 73f5071 | 2011-08-16 22:19:28 +0530 | [diff] [blame] | 821 | /* |
| 822 | * If we had a rename on the server and a parallel lookup |
| 823 | * for the new name, then make sure we instantiate with |
| 824 | * the new name. ie look up for a/b, while on server somebody |
| 825 | * moved b under k and client parallely did a lookup for |
| 826 | * k/b. |
| 827 | */ |
| 828 | res = d_materialise_unique(dentry, inode); |
Al Viro | a3b2157 | 2013-02-28 01:29:48 -0500 | [diff] [blame] | 829 | if (!res) |
| 830 | v9fs_fid_add(dentry, fid); |
| 831 | else if (!IS_ERR(res)) |
| 832 | v9fs_fid_add(res, fid); |
| 833 | else |
Al Viro | 7b5be62 | 2013-02-28 01:28:21 -0500 | [diff] [blame] | 834 | p9_client_clunk(fid); |
| 835 | return res; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 836 | } |
| 837 | |
Al Viro | d958527 | 2012-06-22 12:39:14 +0400 | [diff] [blame] | 838 | static int |
Miklos Szeredi | e43ae79 | 2012-06-05 15:10:26 +0200 | [diff] [blame] | 839 | v9fs_vfs_atomic_open(struct inode *dir, struct dentry *dentry, |
Al Viro | 30d9049 | 2012-06-22 12:40:19 +0400 | [diff] [blame] | 840 | struct file *file, unsigned flags, umode_t mode, |
Al Viro | 4723768 | 2012-06-10 05:01:45 -0400 | [diff] [blame] | 841 | int *opened) |
Miklos Szeredi | e43ae79 | 2012-06-05 15:10:26 +0200 | [diff] [blame] | 842 | { |
| 843 | int err; |
| 844 | u32 perm; |
Miklos Szeredi | e43ae79 | 2012-06-05 15:10:26 +0200 | [diff] [blame] | 845 | struct v9fs_inode *v9inode; |
| 846 | struct v9fs_session_info *v9ses; |
| 847 | struct p9_fid *fid, *inode_fid; |
| 848 | struct dentry *res = NULL; |
| 849 | |
| 850 | if (d_unhashed(dentry)) { |
Al Viro | 00cd8dd | 2012-06-10 17:13:09 -0400 | [diff] [blame] | 851 | res = v9fs_vfs_lookup(dir, dentry, 0); |
Miklos Szeredi | e43ae79 | 2012-06-05 15:10:26 +0200 | [diff] [blame] | 852 | if (IS_ERR(res)) |
Al Viro | d958527 | 2012-06-22 12:39:14 +0400 | [diff] [blame] | 853 | return PTR_ERR(res); |
Miklos Szeredi | e43ae79 | 2012-06-05 15:10:26 +0200 | [diff] [blame] | 854 | |
| 855 | if (res) |
| 856 | dentry = res; |
| 857 | } |
| 858 | |
| 859 | /* Only creates */ |
Al Viro | e45198a | 2012-06-10 06:48:09 -0400 | [diff] [blame] | 860 | if (!(flags & O_CREAT) || dentry->d_inode) |
| 861 | return finish_no_open(file, res); |
Miklos Szeredi | e43ae79 | 2012-06-05 15:10:26 +0200 | [diff] [blame] | 862 | |
| 863 | err = 0; |
Geyslan G. Bem | fae7469 | 2013-09-28 20:32:15 -0300 | [diff] [blame^] | 864 | |
Miklos Szeredi | e43ae79 | 2012-06-05 15:10:26 +0200 | [diff] [blame] | 865 | v9ses = v9fs_inode2v9ses(dir); |
| 866 | perm = unixmode2p9mode(v9ses, mode); |
| 867 | fid = v9fs_create(v9ses, dir, dentry, NULL, perm, |
| 868 | v9fs_uflags2omode(flags, |
| 869 | v9fs_proto_dotu(v9ses))); |
| 870 | if (IS_ERR(fid)) { |
| 871 | err = PTR_ERR(fid); |
| 872 | fid = NULL; |
| 873 | goto error; |
| 874 | } |
| 875 | |
| 876 | v9fs_invalidate_inode_attr(dir); |
| 877 | v9inode = V9FS_I(dentry->d_inode); |
| 878 | mutex_lock(&v9inode->v_mutex); |
| 879 | if (v9ses->cache && !v9inode->writeback_fid && |
| 880 | ((flags & O_ACCMODE) != O_RDONLY)) { |
| 881 | /* |
| 882 | * clone a fid and add it to writeback_fid |
| 883 | * we do it during open time instead of |
| 884 | * page dirty time via write_begin/page_mkwrite |
| 885 | * because we want write after unlink usecase |
| 886 | * to work. |
| 887 | */ |
| 888 | inode_fid = v9fs_writeback_fid(dentry); |
| 889 | if (IS_ERR(inode_fid)) { |
| 890 | err = PTR_ERR(inode_fid); |
| 891 | mutex_unlock(&v9inode->v_mutex); |
| 892 | goto error; |
| 893 | } |
| 894 | v9inode->writeback_fid = (void *) inode_fid; |
| 895 | } |
| 896 | mutex_unlock(&v9inode->v_mutex); |
Al Viro | 30d9049 | 2012-06-22 12:40:19 +0400 | [diff] [blame] | 897 | err = finish_open(file, dentry, generic_file_open, opened); |
| 898 | if (err) |
Miklos Szeredi | e43ae79 | 2012-06-05 15:10:26 +0200 | [diff] [blame] | 899 | goto error; |
Miklos Szeredi | e43ae79 | 2012-06-05 15:10:26 +0200 | [diff] [blame] | 900 | |
Al Viro | 30d9049 | 2012-06-22 12:40:19 +0400 | [diff] [blame] | 901 | file->private_data = fid; |
Miklos Szeredi | e43ae79 | 2012-06-05 15:10:26 +0200 | [diff] [blame] | 902 | if (v9ses->cache) |
Al Viro | 30d9049 | 2012-06-22 12:40:19 +0400 | [diff] [blame] | 903 | v9fs_cache_inode_set_cookie(dentry->d_inode, file); |
Miklos Szeredi | e43ae79 | 2012-06-05 15:10:26 +0200 | [diff] [blame] | 904 | |
Al Viro | 4723768 | 2012-06-10 05:01:45 -0400 | [diff] [blame] | 905 | *opened |= FILE_CREATED; |
Miklos Szeredi | e43ae79 | 2012-06-05 15:10:26 +0200 | [diff] [blame] | 906 | out: |
| 907 | dput(res); |
Al Viro | d958527 | 2012-06-22 12:39:14 +0400 | [diff] [blame] | 908 | return err; |
Miklos Szeredi | e43ae79 | 2012-06-05 15:10:26 +0200 | [diff] [blame] | 909 | |
| 910 | error: |
| 911 | if (fid) |
| 912 | p9_client_clunk(fid); |
Miklos Szeredi | e43ae79 | 2012-06-05 15:10:26 +0200 | [diff] [blame] | 913 | goto out; |
| 914 | } |
| 915 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 916 | /** |
| 917 | * v9fs_vfs_unlink - VFS unlink hook to delete an inode |
| 918 | * @i: inode that is being unlinked |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 919 | * @d: dentry that is being unlinked |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 920 | * |
| 921 | */ |
| 922 | |
Aneesh Kumar K.V | 53c06f4 | 2011-01-10 13:51:47 -0600 | [diff] [blame] | 923 | int v9fs_vfs_unlink(struct inode *i, struct dentry *d) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 924 | { |
| 925 | return v9fs_remove(i, d, 0); |
| 926 | } |
| 927 | |
| 928 | /** |
| 929 | * v9fs_vfs_rmdir - VFS unlink hook to delete a directory |
| 930 | * @i: inode that is being unlinked |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 931 | * @d: dentry that is being unlinked |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 932 | * |
| 933 | */ |
| 934 | |
Aneesh Kumar K.V | 53c06f4 | 2011-01-10 13:51:47 -0600 | [diff] [blame] | 935 | int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 936 | { |
Aneesh Kumar K.V | 48e370f | 2011-06-28 15:41:18 +0530 | [diff] [blame] | 937 | return v9fs_remove(i, d, AT_REMOVEDIR); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 938 | } |
| 939 | |
| 940 | /** |
| 941 | * v9fs_vfs_rename - VFS hook to rename an inode |
| 942 | * @old_dir: old dir inode |
| 943 | * @old_dentry: old dentry |
| 944 | * @new_dir: new dir inode |
| 945 | * @new_dentry: new dentry |
| 946 | * |
| 947 | */ |
| 948 | |
Aneesh Kumar K.V | 53c06f4 | 2011-01-10 13:51:47 -0600 | [diff] [blame] | 949 | int |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 950 | v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry, |
| 951 | struct inode *new_dir, struct dentry *new_dentry) |
| 952 | { |
Aneesh Kumar K.V | d28c61f | 2011-02-28 17:04:08 +0530 | [diff] [blame] | 953 | int retval; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 954 | struct inode *old_inode; |
Aneesh Kumar K.V | b271ec4 | 2011-02-28 17:04:05 +0530 | [diff] [blame] | 955 | struct inode *new_inode; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 956 | struct v9fs_session_info *v9ses; |
| 957 | struct p9_fid *oldfid; |
| 958 | struct p9_fid *olddirfid; |
| 959 | struct p9_fid *newdirfid; |
| 960 | struct p9_wstat wstat; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 961 | |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 962 | p9_debug(P9_DEBUG_VFS, "\n"); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 963 | retval = 0; |
| 964 | old_inode = old_dentry->d_inode; |
Aneesh Kumar K.V | b271ec4 | 2011-02-28 17:04:05 +0530 | [diff] [blame] | 965 | new_inode = new_dentry->d_inode; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 966 | v9ses = v9fs_inode2v9ses(old_inode); |
| 967 | oldfid = v9fs_fid_lookup(old_dentry); |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 968 | if (IS_ERR(oldfid)) |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 969 | return PTR_ERR(oldfid); |
| 970 | |
| 971 | olddirfid = v9fs_fid_clone(old_dentry->d_parent); |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 972 | if (IS_ERR(olddirfid)) { |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 973 | retval = PTR_ERR(olddirfid); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 974 | goto done; |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 975 | } |
| 976 | |
| 977 | newdirfid = v9fs_fid_clone(new_dentry->d_parent); |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 978 | if (IS_ERR(newdirfid)) { |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 979 | retval = PTR_ERR(newdirfid); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 980 | goto clunk_olddir; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 981 | } |
| 982 | |
Aneesh Kumar K.V | a534c8d | 2010-06-30 19:18:50 +0530 | [diff] [blame] | 983 | down_write(&v9ses->rename_sem); |
Sripathi Kodi | 4681dbd | 2010-03-25 12:47:26 +0000 | [diff] [blame] | 984 | if (v9fs_proto_dotl(v9ses)) { |
Aneesh Kumar K.V | 9e8fb38 | 2011-06-28 15:41:16 +0530 | [diff] [blame] | 985 | retval = p9_client_renameat(olddirfid, old_dentry->d_name.name, |
| 986 | newdirfid, new_dentry->d_name.name); |
| 987 | if (retval == -EOPNOTSUPP) |
| 988 | retval = p9_client_rename(oldfid, newdirfid, |
| 989 | new_dentry->d_name.name); |
| 990 | if (retval != -EOPNOTSUPP) |
Sripathi Kodi | 4681dbd | 2010-03-25 12:47:26 +0000 | [diff] [blame] | 991 | goto clunk_newdir; |
| 992 | } |
Aneesh Kumar K.V | a534c8d | 2010-06-30 19:18:50 +0530 | [diff] [blame] | 993 | if (old_dentry->d_parent != new_dentry->d_parent) { |
| 994 | /* |
| 995 | * 9P .u can only handle file rename in the same directory |
| 996 | */ |
Sripathi Kodi | 4681dbd | 2010-03-25 12:47:26 +0000 | [diff] [blame] | 997 | |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 998 | p9_debug(P9_DEBUG_ERROR, "old dir and new dir are different\n"); |
Eric Van Hensbergen | 621997c | 2007-01-26 00:57:04 -0800 | [diff] [blame] | 999 | retval = -EXDEV; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1000 | goto clunk_newdir; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1001 | } |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1002 | v9fs_blank_wstat(&wstat); |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 1003 | wstat.muid = v9ses->uname; |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1004 | wstat.name = (char *) new_dentry->d_name.name; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1005 | retval = p9_client_wstat(oldfid, &wstat); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1006 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1007 | clunk_newdir: |
Aneesh Kumar K.V | b271ec4 | 2011-02-28 17:04:05 +0530 | [diff] [blame] | 1008 | if (!retval) { |
| 1009 | if (new_inode) { |
| 1010 | if (S_ISDIR(new_inode->i_mode)) |
| 1011 | clear_nlink(new_inode); |
| 1012 | else |
| 1013 | drop_nlink(new_inode); |
| 1014 | } |
| 1015 | if (S_ISDIR(old_inode->i_mode)) { |
| 1016 | if (!new_inode) |
| 1017 | inc_nlink(new_dir); |
| 1018 | drop_nlink(old_dir); |
| 1019 | } |
Aneesh Kumar K.V | 3bc86de | 2011-02-28 17:04:07 +0530 | [diff] [blame] | 1020 | v9fs_invalidate_inode_attr(old_inode); |
Aneesh Kumar K.V | d28c61f | 2011-02-28 17:04:08 +0530 | [diff] [blame] | 1021 | v9fs_invalidate_inode_attr(old_dir); |
| 1022 | v9fs_invalidate_inode_attr(new_dir); |
Aneesh Kumar K.V | 3bc86de | 2011-02-28 17:04:07 +0530 | [diff] [blame] | 1023 | |
Aneesh Kumar K.V | a534c8d | 2010-06-30 19:18:50 +0530 | [diff] [blame] | 1024 | /* successful rename */ |
| 1025 | d_move(old_dentry, new_dentry); |
Aneesh Kumar K.V | b271ec4 | 2011-02-28 17:04:05 +0530 | [diff] [blame] | 1026 | } |
Aneesh Kumar K.V | a534c8d | 2010-06-30 19:18:50 +0530 | [diff] [blame] | 1027 | up_write(&v9ses->rename_sem); |
Latchesar Ionkov | 22150c4 | 2007-10-23 13:48:33 -0500 | [diff] [blame] | 1028 | p9_client_clunk(newdirfid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1029 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1030 | clunk_olddir: |
Latchesar Ionkov | 22150c4 | 2007-10-23 13:48:33 -0500 | [diff] [blame] | 1031 | p9_client_clunk(olddirfid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1032 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1033 | done: |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1034 | return retval; |
| 1035 | } |
| 1036 | |
| 1037 | /** |
Adrian Bunk | 943ffb5 | 2006-01-10 00:10:13 +0100 | [diff] [blame] | 1038 | * v9fs_vfs_getattr - retrieve file metadata |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 1039 | * @mnt: mount information |
| 1040 | * @dentry: file to get attributes on |
| 1041 | * @stat: metadata structure to populate |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1042 | * |
| 1043 | */ |
| 1044 | |
| 1045 | static int |
| 1046 | v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry, |
| 1047 | struct kstat *stat) |
| 1048 | { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1049 | struct v9fs_session_info *v9ses; |
| 1050 | struct p9_fid *fid; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1051 | struct p9_wstat *st; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1052 | |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 1053 | p9_debug(P9_DEBUG_VFS, "dentry: %p\n", dentry); |
Aneesh Kumar K.V | 42869c8 | 2011-03-08 16:39:50 +0530 | [diff] [blame] | 1054 | v9ses = v9fs_dentry2v9ses(dentry); |
Aneesh Kumar K.V | a121190 | 2011-02-28 17:04:01 +0530 | [diff] [blame] | 1055 | if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { |
| 1056 | generic_fillattr(dentry->d_inode, stat); |
| 1057 | return 0; |
| 1058 | } |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1059 | fid = v9fs_fid_lookup(dentry); |
| 1060 | if (IS_ERR(fid)) |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 1061 | return PTR_ERR(fid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1062 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1063 | st = p9_client_stat(fid); |
| 1064 | if (IS_ERR(st)) |
| 1065 | return PTR_ERR(st); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1066 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1067 | 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] | 1068 | generic_fillattr(dentry->d_inode, stat); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1069 | |
Latchesar Ionkov | 62b2be5 | 2010-08-24 18:13:59 +0000 | [diff] [blame] | 1070 | p9stat_free(st); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1071 | kfree(st); |
| 1072 | return 0; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1073 | } |
| 1074 | |
| 1075 | /** |
| 1076 | * v9fs_vfs_setattr - set file metadata |
| 1077 | * @dentry: file whose metadata to set |
| 1078 | * @iattr: metadata assignment structure |
| 1079 | * |
| 1080 | */ |
| 1081 | |
| 1082 | static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr) |
| 1083 | { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1084 | int retval; |
| 1085 | struct v9fs_session_info *v9ses; |
| 1086 | struct p9_fid *fid; |
| 1087 | struct p9_wstat wstat; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1088 | |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 1089 | p9_debug(P9_DEBUG_VFS, "\n"); |
Aneesh Kumar K.V | 059c138 | 2011-03-08 16:39:48 +0530 | [diff] [blame] | 1090 | retval = inode_change_ok(dentry->d_inode, iattr); |
| 1091 | if (retval) |
| 1092 | return retval; |
| 1093 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1094 | retval = -EPERM; |
Aneesh Kumar K.V | 42869c8 | 2011-03-08 16:39:50 +0530 | [diff] [blame] | 1095 | v9ses = v9fs_dentry2v9ses(dentry); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1096 | fid = v9fs_fid_lookup(dentry); |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 1097 | if(IS_ERR(fid)) |
| 1098 | return PTR_ERR(fid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1099 | |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1100 | v9fs_blank_wstat(&wstat); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1101 | if (iattr->ia_valid & ATTR_MODE) |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1102 | wstat.mode = unixmode2p9mode(v9ses, iattr->ia_mode); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1103 | |
| 1104 | if (iattr->ia_valid & ATTR_MTIME) |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1105 | wstat.mtime = iattr->ia_mtime.tv_sec; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1106 | |
| 1107 | if (iattr->ia_valid & ATTR_ATIME) |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1108 | wstat.atime = iattr->ia_atime.tv_sec; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1109 | |
| 1110 | if (iattr->ia_valid & ATTR_SIZE) |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1111 | wstat.length = iattr->ia_size; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1112 | |
Sripathi Kodi | dd6102f | 2010-03-05 18:48:00 +0000 | [diff] [blame] | 1113 | if (v9fs_proto_dotu(v9ses)) { |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1114 | if (iattr->ia_valid & ATTR_UID) |
| 1115 | wstat.n_uid = iattr->ia_uid; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1116 | |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1117 | if (iattr->ia_valid & ATTR_GID) |
| 1118 | wstat.n_gid = iattr->ia_gid; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1119 | } |
Aneesh Kumar K.V | 059c138 | 2011-03-08 16:39:48 +0530 | [diff] [blame] | 1120 | |
Aneesh Kumar K.V | 3dc5436 | 2011-02-28 17:04:11 +0530 | [diff] [blame] | 1121 | /* Write all dirty data */ |
| 1122 | if (S_ISREG(dentry->d_inode->i_mode)) |
| 1123 | filemap_write_and_wait(dentry->d_inode->i_mapping); |
| 1124 | |
Aneesh Kumar K.V | f10fc50 | 2011-02-28 17:04:10 +0530 | [diff] [blame] | 1125 | retval = p9_client_wstat(fid, &wstat); |
| 1126 | if (retval < 0) |
| 1127 | return retval; |
Aneesh Kumar K.V | 059c138 | 2011-03-08 16:39:48 +0530 | [diff] [blame] | 1128 | |
| 1129 | if ((iattr->ia_valid & ATTR_SIZE) && |
| 1130 | iattr->ia_size != i_size_read(dentry->d_inode)) |
| 1131 | truncate_setsize(dentry->d_inode, iattr->ia_size); |
| 1132 | |
Aneesh Kumar K.V | f10fc50 | 2011-02-28 17:04:10 +0530 | [diff] [blame] | 1133 | v9fs_invalidate_inode_attr(dentry->d_inode); |
Christoph Hellwig | 1025774 | 2010-06-04 11:30:02 +0200 | [diff] [blame] | 1134 | |
| 1135 | setattr_copy(dentry->d_inode, iattr); |
| 1136 | mark_inode_dirty(dentry->d_inode); |
| 1137 | return 0; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1138 | } |
| 1139 | |
| 1140 | /** |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1141 | * v9fs_stat2inode - populate an inode structure with mistat info |
| 1142 | * @stat: Plan 9 metadata (mistat) structure |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1143 | * @inode: inode to populate |
| 1144 | * @sb: superblock of filesystem |
| 1145 | * |
| 1146 | */ |
| 1147 | |
| 1148 | void |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1149 | v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode, |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1150 | struct super_block *sb) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1151 | { |
Al Viro | 3eda0de | 2011-07-26 02:53:22 -0400 | [diff] [blame] | 1152 | umode_t mode; |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1153 | char ext[32]; |
Aneesh Kumar K.V | 5717144 | 2010-03-05 14:43:43 -0600 | [diff] [blame] | 1154 | char tag_name[14]; |
| 1155 | unsigned int i_nlink; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1156 | struct v9fs_session_info *v9ses = sb->s_fs_info; |
Aneesh Kumar K.V | b3cbea0 | 2011-02-28 17:04:06 +0530 | [diff] [blame] | 1157 | struct v9fs_inode *v9inode = V9FS_I(inode); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1158 | |
Miklos Szeredi | bfe8684 | 2011-10-28 14:13:29 +0200 | [diff] [blame] | 1159 | set_nlink(inode, 1); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1160 | |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1161 | inode->i_atime.tv_sec = stat->atime; |
| 1162 | inode->i_mtime.tv_sec = stat->mtime; |
| 1163 | inode->i_ctime.tv_sec = stat->mtime; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1164 | |
Latchesar Ionkov | bd32b82 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 1165 | inode->i_uid = v9ses->dfltuid; |
| 1166 | inode->i_gid = v9ses->dfltgid; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1167 | |
Sripathi Kodi | dd6102f | 2010-03-05 18:48:00 +0000 | [diff] [blame] | 1168 | if (v9fs_proto_dotu(v9ses)) { |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1169 | inode->i_uid = stat->n_uid; |
| 1170 | inode->i_gid = stat->n_gid; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1171 | } |
Aneesh Kumar K.V | 5717144 | 2010-03-05 14:43:43 -0600 | [diff] [blame] | 1172 | if ((S_ISREG(inode->i_mode)) || (S_ISDIR(inode->i_mode))) { |
| 1173 | if (v9fs_proto_dotu(v9ses) && (stat->extension[0] != '\0')) { |
| 1174 | /* |
| 1175 | * Hadlink support got added later to |
| 1176 | * to the .u extension. So there can be |
| 1177 | * server out there that doesn't support |
| 1178 | * this even with .u extension. So check |
| 1179 | * for non NULL stat->extension |
| 1180 | */ |
Chen Gang | b3f8ab4 | 2013-07-16 15:33:16 +0800 | [diff] [blame] | 1181 | strlcpy(ext, stat->extension, sizeof(ext)); |
Aneesh Kumar K.V | 5717144 | 2010-03-05 14:43:43 -0600 | [diff] [blame] | 1182 | /* HARDLINKCOUNT %u */ |
| 1183 | sscanf(ext, "%13s %u", tag_name, &i_nlink); |
| 1184 | if (!strncmp(tag_name, "HARDLINKCOUNT", 13)) |
Miklos Szeredi | bfe8684 | 2011-10-28 14:13:29 +0200 | [diff] [blame] | 1185 | set_nlink(inode, i_nlink); |
Aneesh Kumar K.V | 5717144 | 2010-03-05 14:43:43 -0600 | [diff] [blame] | 1186 | } |
| 1187 | } |
Aneesh Kumar K.V | df345c6 | 2012-01-05 13:39:49 +0530 | [diff] [blame] | 1188 | mode = p9mode2perm(v9ses, stat); |
Aneesh Kumar K.V | 4508914 | 2011-07-25 18:06:33 +0000 | [diff] [blame] | 1189 | mode |= inode->i_mode & ~S_IALLUGO; |
| 1190 | inode->i_mode = mode; |
Abhishek Kulkarni | 7549ae3 | 2009-09-22 11:34:05 -0500 | [diff] [blame] | 1191 | i_size_write(inode, stat->length); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1192 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1193 | /* not real number of blocks, but 512 byte ones ... */ |
Abhishek Kulkarni | 7549ae3 | 2009-09-22 11:34:05 -0500 | [diff] [blame] | 1194 | inode->i_blocks = (i_size_read(inode) + 512 - 1) >> 9; |
Aneesh Kumar K.V | b3cbea0 | 2011-02-28 17:04:06 +0530 | [diff] [blame] | 1195 | v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1196 | } |
| 1197 | |
| 1198 | /** |
| 1199 | * v9fs_qid2ino - convert qid into inode number |
| 1200 | * @qid: qid to hash |
| 1201 | * |
| 1202 | * BUG: potential for inode number collisions? |
| 1203 | */ |
| 1204 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1205 | ino_t v9fs_qid2ino(struct p9_qid *qid) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1206 | { |
| 1207 | u64 path = qid->path + 2; |
| 1208 | ino_t i = 0; |
| 1209 | |
| 1210 | if (sizeof(ino_t) == sizeof(path)) |
| 1211 | memcpy(&i, &path, sizeof(ino_t)); |
| 1212 | else |
| 1213 | i = (ino_t) (path ^ (path >> 32)); |
| 1214 | |
| 1215 | return i; |
| 1216 | } |
| 1217 | |
| 1218 | /** |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1219 | * v9fs_readlink - read a symlink's location (internal version) |
| 1220 | * @dentry: dentry for symlink |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 1221 | * @buffer: buffer to load symlink location into |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1222 | * @buflen: length of buffer |
| 1223 | * |
| 1224 | */ |
| 1225 | |
| 1226 | static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen) |
| 1227 | { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1228 | int retval; |
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 | struct v9fs_session_info *v9ses; |
| 1231 | struct p9_fid *fid; |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 1232 | struct p9_wstat *st; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1233 | |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 1234 | p9_debug(P9_DEBUG_VFS, " %s\n", dentry->d_name.name); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1235 | retval = -EPERM; |
Aneesh Kumar K.V | 42869c8 | 2011-03-08 16:39:50 +0530 | [diff] [blame] | 1236 | v9ses = v9fs_dentry2v9ses(dentry); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1237 | fid = v9fs_fid_lookup(dentry); |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 1238 | if (IS_ERR(fid)) |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 1239 | return PTR_ERR(fid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1240 | |
M. Mohan Kumar | 329176c | 2010-09-28 19:59:25 +0530 | [diff] [blame] | 1241 | if (!v9fs_proto_dotu(v9ses)) |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1242 | return -EBADF; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1243 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1244 | st = p9_client_stat(fid); |
| 1245 | if (IS_ERR(st)) |
| 1246 | return PTR_ERR(st); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1247 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1248 | if (!(st->mode & P9_DMSYMLINK)) { |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1249 | retval = -EINVAL; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1250 | goto done; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1251 | } |
| 1252 | |
| 1253 | /* copy extension buffer into buffer */ |
Jim Meyering | ba413ab | 2012-08-21 09:20:49 +0200 | [diff] [blame] | 1254 | retval = min(strlen(st->extension)+1, (size_t)buflen); |
| 1255 | memcpy(buffer, st->extension, retval); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1256 | |
Jim Meyering | ba413ab | 2012-08-21 09:20:49 +0200 | [diff] [blame] | 1257 | p9_debug(P9_DEBUG_VFS, "%s -> %s (%.*s)\n", |
| 1258 | dentry->d_name.name, st->extension, buflen, buffer); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1259 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1260 | done: |
Latchesar Ionkov | 62b2be5 | 2010-08-24 18:13:59 +0000 | [diff] [blame] | 1261 | p9stat_free(st); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1262 | kfree(st); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1263 | return retval; |
| 1264 | } |
| 1265 | |
| 1266 | /** |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1267 | * v9fs_vfs_follow_link - follow a symlink path |
| 1268 | * @dentry: dentry for symlink |
| 1269 | * @nd: nameidata |
| 1270 | * |
| 1271 | */ |
| 1272 | |
| 1273 | static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd) |
| 1274 | { |
| 1275 | int len = 0; |
| 1276 | char *link = __getname(); |
| 1277 | |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 1278 | p9_debug(P9_DEBUG_VFS, "%s\n", dentry->d_name.name); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1279 | |
| 1280 | if (!link) |
| 1281 | link = ERR_PTR(-ENOMEM); |
| 1282 | else { |
Latchesar Ionkov | 16cce6d | 2006-03-25 03:07:26 -0800 | [diff] [blame] | 1283 | len = v9fs_readlink(dentry, link, PATH_MAX); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1284 | |
| 1285 | if (len < 0) { |
Davi Arnaut | ce44eeb | 2005-11-07 00:59:36 -0800 | [diff] [blame] | 1286 | __putname(link); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1287 | link = ERR_PTR(len); |
| 1288 | } else |
Martin Stava | 2511cd0 | 2009-11-02 08:39:34 -0600 | [diff] [blame] | 1289 | link[min(len, PATH_MAX-1)] = 0; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1290 | } |
| 1291 | nd_set_link(nd, link); |
| 1292 | |
| 1293 | return NULL; |
| 1294 | } |
| 1295 | |
| 1296 | /** |
| 1297 | * v9fs_vfs_put_link - release a symlink path |
| 1298 | * @dentry: dentry for symlink |
| 1299 | * @nd: nameidata |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 1300 | * @p: unused |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1301 | * |
| 1302 | */ |
| 1303 | |
Aneesh Kumar K.V | 53c06f4 | 2011-01-10 13:51:47 -0600 | [diff] [blame] | 1304 | void |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 1305 | 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] | 1306 | { |
| 1307 | char *s = nd_get_link(nd); |
| 1308 | |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 1309 | p9_debug(P9_DEBUG_VFS, " %s %s\n", |
| 1310 | dentry->d_name.name, IS_ERR(s) ? "<error>" : s); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1311 | if (!IS_ERR(s)) |
Davi Arnaut | ce44eeb | 2005-11-07 00:59:36 -0800 | [diff] [blame] | 1312 | __putname(s); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1313 | } |
| 1314 | |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 1315 | /** |
| 1316 | * v9fs_vfs_mkspecial - create a special file |
| 1317 | * @dir: inode to create special file in |
| 1318 | * @dentry: dentry to create |
| 1319 | * @mode: mode to create special file |
| 1320 | * @extension: 9p2000.u format extension string representing special file |
| 1321 | * |
| 1322 | */ |
| 1323 | |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1324 | static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, |
Al Viro | c2837de | 2011-07-24 18:59:07 -0400 | [diff] [blame] | 1325 | u32 perm, const char *extension) |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1326 | { |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1327 | struct p9_fid *fid; |
Aneesh Kumar K.V | d28c61f | 2011-02-28 17:04:08 +0530 | [diff] [blame] | 1328 | struct v9fs_session_info *v9ses; |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1329 | |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 1330 | v9ses = v9fs_inode2v9ses(dir); |
Sripathi Kodi | dd6102f | 2010-03-05 18:48:00 +0000 | [diff] [blame] | 1331 | if (!v9fs_proto_dotu(v9ses)) { |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 1332 | p9_debug(P9_DEBUG_ERROR, "not extended\n"); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 1333 | return -EPERM; |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1334 | } |
| 1335 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1336 | fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm, |
| 1337 | P9_OREAD); |
| 1338 | if (IS_ERR(fid)) |
| 1339 | return PTR_ERR(fid); |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 1340 | |
Aneesh Kumar K.V | d28c61f | 2011-02-28 17:04:08 +0530 | [diff] [blame] | 1341 | v9fs_invalidate_inode_attr(dir); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1342 | p9_client_clunk(fid); |
Latchesar Ionkov | 6a3124a | 2006-03-02 02:54:30 -0800 | [diff] [blame] | 1343 | return 0; |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1344 | } |
| 1345 | |
| 1346 | /** |
| 1347 | * v9fs_vfs_symlink - helper function to create symlinks |
| 1348 | * @dir: directory inode containing symlink |
| 1349 | * @dentry: dentry for symlink |
| 1350 | * @symname: symlink data |
| 1351 | * |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 1352 | * See Also: 9P2000.u RFC for more information |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1353 | * |
| 1354 | */ |
| 1355 | |
| 1356 | static int |
| 1357 | v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname) |
| 1358 | { |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 1359 | p9_debug(P9_DEBUG_VFS, " %lu,%s,%s\n", |
| 1360 | dir->i_ino, dentry->d_name.name, symname); |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1361 | |
Al Viro | c2837de | 2011-07-24 18:59:07 -0400 | [diff] [blame] | 1362 | return v9fs_vfs_mkspecial(dir, dentry, P9_DMSYMLINK, symname); |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1363 | } |
| 1364 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1365 | /** |
| 1366 | * v9fs_vfs_link - create a hardlink |
| 1367 | * @old_dentry: dentry for file to link to |
| 1368 | * @dir: inode destination for new link |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 1369 | * @dentry: dentry for link |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1370 | * |
| 1371 | */ |
| 1372 | |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1373 | static int |
| 1374 | v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, |
| 1375 | struct dentry *dentry) |
| 1376 | { |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1377 | int retval; |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1378 | char *name; |
Aneesh Kumar K.V | d28c61f | 2011-02-28 17:04:08 +0530 | [diff] [blame] | 1379 | struct p9_fid *oldfid; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1380 | |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 1381 | p9_debug(P9_DEBUG_VFS, " %lu,%s,%s\n", |
| 1382 | dir->i_ino, dentry->d_name.name, old_dentry->d_name.name); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1383 | |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 1384 | oldfid = v9fs_fid_clone(old_dentry); |
Latchesar Ionkov | ba17674 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 1385 | if (IS_ERR(oldfid)) |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 1386 | return PTR_ERR(oldfid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1387 | |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1388 | name = __getname(); |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 1389 | if (unlikely(!name)) { |
| 1390 | retval = -ENOMEM; |
| 1391 | goto clunk_fid; |
| 1392 | } |
Florin Malita | 0710d36 | 2006-06-25 05:48:31 -0700 | [diff] [blame] | 1393 | |
Latchesar Ionkov | 16cce6d | 2006-03-25 03:07:26 -0800 | [diff] [blame] | 1394 | sprintf(name, "%d\n", oldfid->fid); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1395 | retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name); |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1396 | __putname(name); |
Aneesh Kumar K.V | c06c066 | 2011-02-28 17:04:09 +0530 | [diff] [blame] | 1397 | if (!retval) { |
| 1398 | v9fs_refresh_inode(oldfid, old_dentry->d_inode); |
Aneesh Kumar K.V | d28c61f | 2011-02-28 17:04:08 +0530 | [diff] [blame] | 1399 | v9fs_invalidate_inode_attr(dir); |
Aneesh Kumar K.V | c06c066 | 2011-02-28 17:04:09 +0530 | [diff] [blame] | 1400 | } |
Eric Van Hensbergen | da977b2 | 2007-01-26 00:57:06 -0800 | [diff] [blame] | 1401 | clunk_fid: |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 1402 | p9_client_clunk(oldfid); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1403 | return retval; |
| 1404 | } |
| 1405 | |
| 1406 | /** |
| 1407 | * v9fs_vfs_mknod - create a special file |
| 1408 | * @dir: inode destination for new link |
| 1409 | * @dentry: dentry for file |
| 1410 | * @mode: mode for creation |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 1411 | * @rdev: device associated with special file |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1412 | * |
| 1413 | */ |
| 1414 | |
| 1415 | static int |
Al Viro | 1a67aaf | 2011-07-26 01:52:52 -0400 | [diff] [blame] | 1416 | v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t rdev) |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1417 | { |
Al Viro | c2837de | 2011-07-24 18:59:07 -0400 | [diff] [blame] | 1418 | struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1419 | int retval; |
| 1420 | char *name; |
Al Viro | c2837de | 2011-07-24 18:59:07 -0400 | [diff] [blame] | 1421 | u32 perm; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1422 | |
Linus Torvalds | 609eac1 | 2012-01-10 15:09:01 -0800 | [diff] [blame] | 1423 | p9_debug(P9_DEBUG_VFS, " %lu,%s mode: %hx MAJOR: %u MINOR: %u\n", |
Joe Perches | 5d38515 | 2011-11-28 10:40:46 -0800 | [diff] [blame] | 1424 | dir->i_ino, dentry->d_name.name, mode, |
| 1425 | MAJOR(rdev), MINOR(rdev)); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1426 | |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1427 | if (!new_valid_dev(rdev)) |
| 1428 | return -EINVAL; |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 1429 | |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1430 | name = __getname(); |
Eugene Teo | c0291a0 | 2006-03-25 03:07:27 -0800 | [diff] [blame] | 1431 | if (!name) |
| 1432 | return -ENOMEM; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1433 | /* build extension */ |
| 1434 | if (S_ISBLK(mode)) |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1435 | sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev)); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1436 | else if (S_ISCHR(mode)) |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1437 | sprintf(name, "c %u %u", MAJOR(rdev), MINOR(rdev)); |
Eric Van Hensbergen | 73c592b | 2005-09-09 13:04:26 -0700 | [diff] [blame] | 1438 | else if (S_ISFIFO(mode)) |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1439 | *name = 0; |
Venkateswararao Jujjuri | 75cc5c9 | 2010-05-22 12:20:30 -0500 | [diff] [blame] | 1440 | else if (S_ISSOCK(mode)) |
| 1441 | *name = 0; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1442 | else { |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1443 | __putname(name); |
| 1444 | return -EINVAL; |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1445 | } |
| 1446 | |
Al Viro | c2837de | 2011-07-24 18:59:07 -0400 | [diff] [blame] | 1447 | perm = unixmode2p9mode(v9ses, mode); |
| 1448 | retval = v9fs_vfs_mkspecial(dir, dentry, perm, name); |
Latchesar Ionkov | 531b109 | 2006-01-08 01:05:00 -0800 | [diff] [blame] | 1449 | __putname(name); |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1450 | |
| 1451 | return retval; |
| 1452 | } |
| 1453 | |
Aneesh Kumar K.V | b3cbea0 | 2011-02-28 17:04:06 +0530 | [diff] [blame] | 1454 | int v9fs_refresh_inode(struct p9_fid *fid, struct inode *inode) |
| 1455 | { |
Aneesh Kumar K.V | 4508914 | 2011-07-25 18:06:33 +0000 | [diff] [blame] | 1456 | int umode; |
| 1457 | dev_t rdev; |
Aneesh Kumar K.V | b3cbea0 | 2011-02-28 17:04:06 +0530 | [diff] [blame] | 1458 | loff_t i_size; |
| 1459 | struct p9_wstat *st; |
| 1460 | struct v9fs_session_info *v9ses; |
| 1461 | |
| 1462 | v9ses = v9fs_inode2v9ses(inode); |
| 1463 | st = p9_client_stat(fid); |
| 1464 | if (IS_ERR(st)) |
| 1465 | return PTR_ERR(st); |
Aneesh Kumar K.V | 4508914 | 2011-07-25 18:06:33 +0000 | [diff] [blame] | 1466 | /* |
| 1467 | * Don't update inode if the file type is different |
| 1468 | */ |
| 1469 | umode = p9mode2unixmode(v9ses, st, &rdev); |
| 1470 | if ((inode->i_mode & S_IFMT) != (umode & S_IFMT)) |
| 1471 | goto out; |
Aneesh Kumar K.V | b3cbea0 | 2011-02-28 17:04:06 +0530 | [diff] [blame] | 1472 | |
| 1473 | spin_lock(&inode->i_lock); |
| 1474 | /* |
| 1475 | * We don't want to refresh inode->i_size, |
| 1476 | * because we may have cached data |
| 1477 | */ |
| 1478 | i_size = inode->i_size; |
| 1479 | v9fs_stat2inode(st, inode, inode->i_sb); |
| 1480 | if (v9ses->cache) |
| 1481 | inode->i_size = i_size; |
| 1482 | spin_unlock(&inode->i_lock); |
Aneesh Kumar K.V | 4508914 | 2011-07-25 18:06:33 +0000 | [diff] [blame] | 1483 | out: |
Aneesh Kumar K.V | b3cbea0 | 2011-02-28 17:04:06 +0530 | [diff] [blame] | 1484 | p9stat_free(st); |
| 1485 | kfree(st); |
| 1486 | return 0; |
| 1487 | } |
| 1488 | |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 1489 | static const struct inode_operations v9fs_dir_inode_operations_dotu = { |
| 1490 | .create = v9fs_vfs_create, |
| 1491 | .lookup = v9fs_vfs_lookup, |
Miklos Szeredi | e43ae79 | 2012-06-05 15:10:26 +0200 | [diff] [blame] | 1492 | .atomic_open = v9fs_vfs_atomic_open, |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 1493 | .symlink = v9fs_vfs_symlink, |
Venkateswararao Jujjuri (JV) | 50cc42f | 2010-06-09 15:59:31 -0700 | [diff] [blame] | 1494 | .link = v9fs_vfs_link, |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 1495 | .unlink = v9fs_vfs_unlink, |
| 1496 | .mkdir = v9fs_vfs_mkdir, |
| 1497 | .rmdir = v9fs_vfs_rmdir, |
Aneesh Kumar K.V | 1d76e31 | 2010-08-30 17:43:07 +0000 | [diff] [blame] | 1498 | .mknod = v9fs_vfs_mknod, |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 1499 | .rename = v9fs_vfs_rename, |
| 1500 | .getattr = v9fs_vfs_getattr, |
| 1501 | .setattr = v9fs_vfs_setattr, |
| 1502 | }; |
| 1503 | |
Arjan van de Ven | 754661f | 2007-02-12 00:55:38 -0800 | [diff] [blame] | 1504 | static const struct inode_operations v9fs_dir_inode_operations = { |
Eric Van Hensbergen | b501611 | 2005-09-09 13:04:27 -0700 | [diff] [blame] | 1505 | .create = v9fs_vfs_create, |
| 1506 | .lookup = v9fs_vfs_lookup, |
Miklos Szeredi | e43ae79 | 2012-06-05 15:10:26 +0200 | [diff] [blame] | 1507 | .atomic_open = v9fs_vfs_atomic_open, |
Eric Van Hensbergen | b501611 | 2005-09-09 13:04:27 -0700 | [diff] [blame] | 1508 | .unlink = v9fs_vfs_unlink, |
| 1509 | .mkdir = v9fs_vfs_mkdir, |
| 1510 | .rmdir = v9fs_vfs_rmdir, |
| 1511 | .mknod = v9fs_vfs_mknod, |
| 1512 | .rename = v9fs_vfs_rename, |
| 1513 | .getattr = v9fs_vfs_getattr, |
| 1514 | .setattr = v9fs_vfs_setattr, |
| 1515 | }; |
| 1516 | |
Arjan van de Ven | 754661f | 2007-02-12 00:55:38 -0800 | [diff] [blame] | 1517 | static const struct inode_operations v9fs_file_inode_operations = { |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1518 | .getattr = v9fs_vfs_getattr, |
| 1519 | .setattr = v9fs_vfs_setattr, |
| 1520 | }; |
| 1521 | |
Arjan van de Ven | 754661f | 2007-02-12 00:55:38 -0800 | [diff] [blame] | 1522 | static const struct inode_operations v9fs_symlink_inode_operations = { |
Al Viro | 204f2f0 | 2009-12-23 00:35:54 -0500 | [diff] [blame] | 1523 | .readlink = generic_readlink, |
Eric Van Hensbergen | 2bad847 | 2005-09-09 13:04:19 -0700 | [diff] [blame] | 1524 | .follow_link = v9fs_vfs_follow_link, |
| 1525 | .put_link = v9fs_vfs_put_link, |
| 1526 | .getattr = v9fs_vfs_getattr, |
| 1527 | .setattr = v9fs_vfs_setattr, |
| 1528 | }; |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 1529 | |