Robert Love | 0eeca28 | 2005-07-12 17:06:03 -0400 | [diff] [blame] | 1 | #ifndef _LINUX_FS_NOTIFY_H |
| 2 | #define _LINUX_FS_NOTIFY_H |
| 3 | |
| 4 | /* |
| 5 | * include/linux/fsnotify.h - generic hooks for filesystem notification, to |
| 6 | * reduce in-source duplication from both dnotify and inotify. |
| 7 | * |
| 8 | * We don't compile any of this away in some complicated menagerie of ifdefs. |
| 9 | * Instead, we rely on the code inside to optimize away as needed. |
| 10 | * |
| 11 | * (C) Copyright 2005 Robert Love |
| 12 | */ |
| 13 | |
| 14 | #ifdef __KERNEL__ |
| 15 | |
| 16 | #include <linux/dnotify.h> |
| 17 | #include <linux/inotify.h> |
Amy Griffis | 73241cc | 2005-11-03 16:00:25 +0000 | [diff] [blame] | 18 | #include <linux/audit.h> |
Robert Love | 0eeca28 | 2005-07-12 17:06:03 -0400 | [diff] [blame] | 19 | |
| 20 | /* |
Nick Piggin | c32ccd8 | 2006-03-25 03:07:09 -0800 | [diff] [blame] | 21 | * fsnotify_d_instantiate - instantiate a dentry for inode |
| 22 | * Called with dcache_lock held. |
| 23 | */ |
| 24 | static inline void fsnotify_d_instantiate(struct dentry *entry, |
| 25 | struct inode *inode) |
| 26 | { |
| 27 | inotify_d_instantiate(entry, inode); |
| 28 | } |
| 29 | |
| 30 | /* |
| 31 | * fsnotify_d_move - entry has been moved |
| 32 | * Called with dcache_lock and entry->d_lock held. |
| 33 | */ |
| 34 | static inline void fsnotify_d_move(struct dentry *entry) |
| 35 | { |
| 36 | inotify_d_move(entry); |
| 37 | } |
| 38 | |
| 39 | /* |
Robert Love | 0eeca28 | 2005-07-12 17:06:03 -0400 | [diff] [blame] | 40 | * fsnotify_move - file old_name at old_dir was moved to new_name at new_dir |
| 41 | */ |
| 42 | static inline void fsnotify_move(struct inode *old_dir, struct inode *new_dir, |
| 43 | const char *old_name, const char *new_name, |
Al Viro | 5a190ae | 2007-06-07 12:19:32 -0400 | [diff] [blame] | 44 | int isdir, struct inode *target, struct dentry *moved) |
Robert Love | 0eeca28 | 2005-07-12 17:06:03 -0400 | [diff] [blame] | 45 | { |
Al Viro | 5a190ae | 2007-06-07 12:19:32 -0400 | [diff] [blame] | 46 | struct inode *source = moved->d_inode; |
Robert Love | 0eeca28 | 2005-07-12 17:06:03 -0400 | [diff] [blame] | 47 | u32 cookie = inotify_get_cookie(); |
| 48 | |
| 49 | if (old_dir == new_dir) |
| 50 | inode_dir_notify(old_dir, DN_RENAME); |
| 51 | else { |
| 52 | inode_dir_notify(old_dir, DN_DELETE); |
| 53 | inode_dir_notify(new_dir, DN_CREATE); |
| 54 | } |
| 55 | |
| 56 | if (isdir) |
| 57 | isdir = IN_ISDIR; |
Amy Griffis | 7c29772 | 2006-06-01 13:11:01 -0700 | [diff] [blame] | 58 | inotify_inode_queue_event(old_dir, IN_MOVED_FROM|isdir,cookie,old_name, |
| 59 | source); |
| 60 | inotify_inode_queue_event(new_dir, IN_MOVED_TO|isdir, cookie, new_name, |
| 61 | source); |
John McCutchan | 7544953 | 2005-08-01 11:00:45 -0400 | [diff] [blame] | 62 | |
| 63 | if (target) { |
Amy Griffis | 7c29772 | 2006-06-01 13:11:01 -0700 | [diff] [blame] | 64 | inotify_inode_queue_event(target, IN_DELETE_SELF, 0, NULL, NULL); |
John McCutchan | 7544953 | 2005-08-01 11:00:45 -0400 | [diff] [blame] | 65 | inotify_inode_is_dead(target); |
| 66 | } |
John McCutchan | 89204c4 | 2005-08-15 12:13:28 -0400 | [diff] [blame] | 67 | |
| 68 | if (source) { |
Amy Griffis | 7c29772 | 2006-06-01 13:11:01 -0700 | [diff] [blame] | 69 | inotify_inode_queue_event(source, IN_MOVE_SELF, 0, NULL, NULL); |
John McCutchan | 89204c4 | 2005-08-15 12:13:28 -0400 | [diff] [blame] | 70 | } |
Al Viro | 5a190ae | 2007-06-07 12:19:32 -0400 | [diff] [blame] | 71 | audit_inode_child(new_name, moved, new_dir); |
Robert Love | 0eeca28 | 2005-07-12 17:06:03 -0400 | [diff] [blame] | 72 | } |
| 73 | |
| 74 | /* |
John McCutchan | 7a91bf7 | 2005-08-08 13:52:16 -0400 | [diff] [blame] | 75 | * fsnotify_nameremove - a filename was removed from a directory |
| 76 | */ |
| 77 | static inline void fsnotify_nameremove(struct dentry *dentry, int isdir) |
| 78 | { |
| 79 | if (isdir) |
| 80 | isdir = IN_ISDIR; |
| 81 | dnotify_parent(dentry, DN_DELETE); |
| 82 | inotify_dentry_parent_queue_event(dentry, IN_DELETE|isdir, 0, dentry->d_name.name); |
| 83 | } |
| 84 | |
| 85 | /* |
| 86 | * fsnotify_inoderemove - an inode is going away |
| 87 | */ |
| 88 | static inline void fsnotify_inoderemove(struct inode *inode) |
| 89 | { |
Amy Griffis | 7c29772 | 2006-06-01 13:11:01 -0700 | [diff] [blame] | 90 | inotify_inode_queue_event(inode, IN_DELETE_SELF, 0, NULL, NULL); |
John McCutchan | 7a91bf7 | 2005-08-08 13:52:16 -0400 | [diff] [blame] | 91 | inotify_inode_is_dead(inode); |
| 92 | } |
| 93 | |
| 94 | /* |
Jan Kara | ece9591 | 2008-02-06 01:37:13 -0800 | [diff] [blame^] | 95 | * fsnotify_link_count - inode's link count changed |
| 96 | */ |
| 97 | static inline void fsnotify_link_count(struct inode *inode) |
| 98 | { |
| 99 | inotify_inode_queue_event(inode, IN_ATTRIB, 0, NULL, NULL); |
| 100 | } |
| 101 | |
| 102 | /* |
Robert Love | 0eeca28 | 2005-07-12 17:06:03 -0400 | [diff] [blame] | 103 | * fsnotify_create - 'name' was linked in |
| 104 | */ |
Amy Griffis | f38aa94 | 2005-11-03 15:57:06 +0000 | [diff] [blame] | 105 | static inline void fsnotify_create(struct inode *inode, struct dentry *dentry) |
Robert Love | 0eeca28 | 2005-07-12 17:06:03 -0400 | [diff] [blame] | 106 | { |
| 107 | inode_dir_notify(inode, DN_CREATE); |
Amy Griffis | 7c29772 | 2006-06-01 13:11:01 -0700 | [diff] [blame] | 108 | inotify_inode_queue_event(inode, IN_CREATE, 0, dentry->d_name.name, |
| 109 | dentry->d_inode); |
Al Viro | 5a190ae | 2007-06-07 12:19:32 -0400 | [diff] [blame] | 110 | audit_inode_child(dentry->d_name.name, dentry, inode); |
Robert Love | 0eeca28 | 2005-07-12 17:06:03 -0400 | [diff] [blame] | 111 | } |
| 112 | |
| 113 | /* |
Jan Kara | ece9591 | 2008-02-06 01:37:13 -0800 | [diff] [blame^] | 114 | * fsnotify_link - new hardlink in 'inode' directory |
| 115 | * Note: We have to pass also the linked inode ptr as some filesystems leave |
| 116 | * new_dentry->d_inode NULL and instantiate inode pointer later |
| 117 | */ |
| 118 | static inline void fsnotify_link(struct inode *dir, struct inode *inode, struct dentry *new_dentry) |
| 119 | { |
| 120 | inode_dir_notify(dir, DN_CREATE); |
| 121 | inotify_inode_queue_event(dir, IN_CREATE, 0, new_dentry->d_name.name, |
| 122 | inode); |
| 123 | fsnotify_link_count(inode); |
| 124 | audit_inode_child(new_dentry->d_name.name, new_dentry, dir); |
| 125 | } |
| 126 | |
| 127 | /* |
Robert Love | 0eeca28 | 2005-07-12 17:06:03 -0400 | [diff] [blame] | 128 | * fsnotify_mkdir - directory 'name' was created |
| 129 | */ |
Amy Griffis | f38aa94 | 2005-11-03 15:57:06 +0000 | [diff] [blame] | 130 | static inline void fsnotify_mkdir(struct inode *inode, struct dentry *dentry) |
Robert Love | 0eeca28 | 2005-07-12 17:06:03 -0400 | [diff] [blame] | 131 | { |
| 132 | inode_dir_notify(inode, DN_CREATE); |
Amy Griffis | f38aa94 | 2005-11-03 15:57:06 +0000 | [diff] [blame] | 133 | inotify_inode_queue_event(inode, IN_CREATE | IN_ISDIR, 0, |
Amy Griffis | 7c29772 | 2006-06-01 13:11:01 -0700 | [diff] [blame] | 134 | dentry->d_name.name, dentry->d_inode); |
Al Viro | 5a190ae | 2007-06-07 12:19:32 -0400 | [diff] [blame] | 135 | audit_inode_child(dentry->d_name.name, dentry, inode); |
Robert Love | 0eeca28 | 2005-07-12 17:06:03 -0400 | [diff] [blame] | 136 | } |
| 137 | |
| 138 | /* |
| 139 | * fsnotify_access - file was read |
| 140 | */ |
| 141 | static inline void fsnotify_access(struct dentry *dentry) |
| 142 | { |
| 143 | struct inode *inode = dentry->d_inode; |
| 144 | u32 mask = IN_ACCESS; |
| 145 | |
| 146 | if (S_ISDIR(inode->i_mode)) |
| 147 | mask |= IN_ISDIR; |
| 148 | |
| 149 | dnotify_parent(dentry, DN_ACCESS); |
| 150 | inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name); |
Amy Griffis | 7c29772 | 2006-06-01 13:11:01 -0700 | [diff] [blame] | 151 | inotify_inode_queue_event(inode, mask, 0, NULL, NULL); |
Robert Love | 0eeca28 | 2005-07-12 17:06:03 -0400 | [diff] [blame] | 152 | } |
| 153 | |
| 154 | /* |
| 155 | * fsnotify_modify - file was modified |
| 156 | */ |
| 157 | static inline void fsnotify_modify(struct dentry *dentry) |
| 158 | { |
| 159 | struct inode *inode = dentry->d_inode; |
| 160 | u32 mask = IN_MODIFY; |
| 161 | |
| 162 | if (S_ISDIR(inode->i_mode)) |
| 163 | mask |= IN_ISDIR; |
| 164 | |
| 165 | dnotify_parent(dentry, DN_MODIFY); |
| 166 | inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name); |
Amy Griffis | 7c29772 | 2006-06-01 13:11:01 -0700 | [diff] [blame] | 167 | inotify_inode_queue_event(inode, mask, 0, NULL, NULL); |
Robert Love | 0eeca28 | 2005-07-12 17:06:03 -0400 | [diff] [blame] | 168 | } |
| 169 | |
| 170 | /* |
| 171 | * fsnotify_open - file was opened |
| 172 | */ |
| 173 | static inline void fsnotify_open(struct dentry *dentry) |
| 174 | { |
| 175 | struct inode *inode = dentry->d_inode; |
| 176 | u32 mask = IN_OPEN; |
| 177 | |
| 178 | if (S_ISDIR(inode->i_mode)) |
| 179 | mask |= IN_ISDIR; |
| 180 | |
Robert Love | 0eeca28 | 2005-07-12 17:06:03 -0400 | [diff] [blame] | 181 | inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name); |
Amy Griffis | 7c29772 | 2006-06-01 13:11:01 -0700 | [diff] [blame] | 182 | inotify_inode_queue_event(inode, mask, 0, NULL, NULL); |
Robert Love | 0eeca28 | 2005-07-12 17:06:03 -0400 | [diff] [blame] | 183 | } |
| 184 | |
| 185 | /* |
| 186 | * fsnotify_close - file was closed |
| 187 | */ |
| 188 | static inline void fsnotify_close(struct file *file) |
| 189 | { |
Josef "Jeff" Sipek | 0f7fc9e | 2006-12-08 02:36:35 -0800 | [diff] [blame] | 190 | struct dentry *dentry = file->f_path.dentry; |
Robert Love | 0eeca28 | 2005-07-12 17:06:03 -0400 | [diff] [blame] | 191 | struct inode *inode = dentry->d_inode; |
| 192 | const char *name = dentry->d_name.name; |
| 193 | mode_t mode = file->f_mode; |
| 194 | u32 mask = (mode & FMODE_WRITE) ? IN_CLOSE_WRITE : IN_CLOSE_NOWRITE; |
| 195 | |
| 196 | if (S_ISDIR(inode->i_mode)) |
| 197 | mask |= IN_ISDIR; |
| 198 | |
| 199 | inotify_dentry_parent_queue_event(dentry, mask, 0, name); |
Amy Griffis | 7c29772 | 2006-06-01 13:11:01 -0700 | [diff] [blame] | 200 | inotify_inode_queue_event(inode, mask, 0, NULL, NULL); |
Robert Love | 0eeca28 | 2005-07-12 17:06:03 -0400 | [diff] [blame] | 201 | } |
| 202 | |
| 203 | /* |
| 204 | * fsnotify_xattr - extended attributes were changed |
| 205 | */ |
| 206 | static inline void fsnotify_xattr(struct dentry *dentry) |
| 207 | { |
| 208 | struct inode *inode = dentry->d_inode; |
| 209 | u32 mask = IN_ATTRIB; |
| 210 | |
| 211 | if (S_ISDIR(inode->i_mode)) |
| 212 | mask |= IN_ISDIR; |
| 213 | |
| 214 | inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name); |
Amy Griffis | 7c29772 | 2006-06-01 13:11:01 -0700 | [diff] [blame] | 215 | inotify_inode_queue_event(inode, mask, 0, NULL, NULL); |
Robert Love | 0eeca28 | 2005-07-12 17:06:03 -0400 | [diff] [blame] | 216 | } |
| 217 | |
| 218 | /* |
| 219 | * fsnotify_change - notify_change event. file was modified and/or metadata |
| 220 | * was changed. |
| 221 | */ |
| 222 | static inline void fsnotify_change(struct dentry *dentry, unsigned int ia_valid) |
| 223 | { |
| 224 | struct inode *inode = dentry->d_inode; |
| 225 | int dn_mask = 0; |
| 226 | u32 in_mask = 0; |
| 227 | |
| 228 | if (ia_valid & ATTR_UID) { |
| 229 | in_mask |= IN_ATTRIB; |
| 230 | dn_mask |= DN_ATTRIB; |
| 231 | } |
| 232 | if (ia_valid & ATTR_GID) { |
| 233 | in_mask |= IN_ATTRIB; |
| 234 | dn_mask |= DN_ATTRIB; |
| 235 | } |
| 236 | if (ia_valid & ATTR_SIZE) { |
| 237 | in_mask |= IN_MODIFY; |
| 238 | dn_mask |= DN_MODIFY; |
| 239 | } |
| 240 | /* both times implies a utime(s) call */ |
| 241 | if ((ia_valid & (ATTR_ATIME | ATTR_MTIME)) == (ATTR_ATIME | ATTR_MTIME)) |
| 242 | { |
| 243 | in_mask |= IN_ATTRIB; |
| 244 | dn_mask |= DN_ATTRIB; |
| 245 | } else if (ia_valid & ATTR_ATIME) { |
| 246 | in_mask |= IN_ACCESS; |
| 247 | dn_mask |= DN_ACCESS; |
| 248 | } else if (ia_valid & ATTR_MTIME) { |
| 249 | in_mask |= IN_MODIFY; |
| 250 | dn_mask |= DN_MODIFY; |
| 251 | } |
| 252 | if (ia_valid & ATTR_MODE) { |
| 253 | in_mask |= IN_ATTRIB; |
| 254 | dn_mask |= DN_ATTRIB; |
| 255 | } |
| 256 | |
| 257 | if (dn_mask) |
| 258 | dnotify_parent(dentry, dn_mask); |
| 259 | if (in_mask) { |
| 260 | if (S_ISDIR(inode->i_mode)) |
| 261 | in_mask |= IN_ISDIR; |
Amy Griffis | 7c29772 | 2006-06-01 13:11:01 -0700 | [diff] [blame] | 262 | inotify_inode_queue_event(inode, in_mask, 0, NULL, NULL); |
Robert Love | 0eeca28 | 2005-07-12 17:06:03 -0400 | [diff] [blame] | 263 | inotify_dentry_parent_queue_event(dentry, in_mask, 0, |
| 264 | dentry->d_name.name); |
| 265 | } |
| 266 | } |
| 267 | |
| 268 | #ifdef CONFIG_INOTIFY /* inotify helpers */ |
| 269 | |
| 270 | /* |
| 271 | * fsnotify_oldname_init - save off the old filename before we change it |
| 272 | */ |
| 273 | static inline const char *fsnotify_oldname_init(const char *name) |
| 274 | { |
| 275 | return kstrdup(name, GFP_KERNEL); |
| 276 | } |
| 277 | |
| 278 | /* |
| 279 | * fsnotify_oldname_free - free the name we got from fsnotify_oldname_init |
| 280 | */ |
| 281 | static inline void fsnotify_oldname_free(const char *old_name) |
| 282 | { |
| 283 | kfree(old_name); |
| 284 | } |
| 285 | |
| 286 | #else /* CONFIG_INOTIFY */ |
| 287 | |
| 288 | static inline const char *fsnotify_oldname_init(const char *name) |
| 289 | { |
| 290 | return NULL; |
| 291 | } |
| 292 | |
| 293 | static inline void fsnotify_oldname_free(const char *old_name) |
| 294 | { |
| 295 | } |
| 296 | |
| 297 | #endif /* ! CONFIG_INOTIFY */ |
| 298 | |
| 299 | #endif /* __KERNEL__ */ |
| 300 | |
| 301 | #endif /* _LINUX_FS_NOTIFY_H */ |