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0eeca283 RL |
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 | ||
0eeca283 RL |
14 | #include <linux/dnotify.h> |
15 | #include <linux/inotify.h> | |
90586523 | 16 | #include <linux/fsnotify_backend.h> |
73241ccc | 17 | #include <linux/audit.h> |
5a0e3ad6 | 18 | #include <linux/slab.h> |
0eeca283 | 19 | |
c32ccd87 NP |
20 | /* |
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 | { | |
c28f7e56 EP |
27 | __fsnotify_d_instantiate(entry, inode); |
28 | ||
c32ccd87 NP |
29 | inotify_d_instantiate(entry, inode); |
30 | } | |
31 | ||
c28f7e56 EP |
32 | /* Notify this dentry's parent about a child's events. */ |
33 | static inline void fsnotify_parent(struct dentry *dentry, __u32 mask) | |
34 | { | |
35 | __fsnotify_parent(dentry, mask); | |
36 | ||
37 | inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name); | |
38 | } | |
39 | ||
c32ccd87 NP |
40 | /* |
41 | * fsnotify_d_move - entry has been moved | |
42 | * Called with dcache_lock and entry->d_lock held. | |
43 | */ | |
44 | static inline void fsnotify_d_move(struct dentry *entry) | |
45 | { | |
c28f7e56 EP |
46 | /* |
47 | * On move we need to update entry->d_flags to indicate if the new parent | |
48 | * cares about events from this entry. | |
49 | */ | |
50 | __fsnotify_update_dcache_flags(entry); | |
51 | ||
c32ccd87 NP |
52 | inotify_d_move(entry); |
53 | } | |
54 | ||
90586523 EP |
55 | /* |
56 | * fsnotify_link_count - inode's link count changed | |
57 | */ | |
58 | static inline void fsnotify_link_count(struct inode *inode) | |
59 | { | |
60 | inotify_inode_queue_event(inode, IN_ATTRIB, 0, NULL, NULL); | |
61 | ||
47882c6f | 62 | fsnotify(inode, FS_ATTRIB, inode, FSNOTIFY_EVENT_INODE, NULL, 0); |
90586523 EP |
63 | } |
64 | ||
0eeca283 RL |
65 | /* |
66 | * fsnotify_move - file old_name at old_dir was moved to new_name at new_dir | |
67 | */ | |
68 | static inline void fsnotify_move(struct inode *old_dir, struct inode *new_dir, | |
123df294 | 69 | const char *old_name, |
5a190ae6 | 70 | int isdir, struct inode *target, struct dentry *moved) |
0eeca283 | 71 | { |
5a190ae6 | 72 | struct inode *source = moved->d_inode; |
47882c6f EP |
73 | u32 in_cookie = inotify_get_cookie(); |
74 | u32 fs_cookie = fsnotify_get_cookie(); | |
ff52cc21 EP |
75 | __u32 old_dir_mask = (FS_EVENT_ON_CHILD | FS_MOVED_FROM); |
76 | __u32 new_dir_mask = (FS_EVENT_ON_CHILD | FS_MOVED_TO); | |
123df294 | 77 | const char *new_name = moved->d_name.name; |
0eeca283 | 78 | |
ff52cc21 EP |
79 | if (old_dir == new_dir) |
80 | old_dir_mask |= FS_DN_RENAME; | |
0eeca283 | 81 | |
90586523 | 82 | if (isdir) { |
0eeca283 | 83 | isdir = IN_ISDIR; |
90586523 EP |
84 | old_dir_mask |= FS_IN_ISDIR; |
85 | new_dir_mask |= FS_IN_ISDIR; | |
86 | } | |
87 | ||
47882c6f | 88 | inotify_inode_queue_event(old_dir, IN_MOVED_FROM|isdir, in_cookie, old_name, |
7c297722 | 89 | source); |
47882c6f | 90 | inotify_inode_queue_event(new_dir, IN_MOVED_TO|isdir, in_cookie, new_name, |
7c297722 | 91 | source); |
75449536 | 92 | |
47882c6f EP |
93 | fsnotify(old_dir, old_dir_mask, old_dir, FSNOTIFY_EVENT_INODE, old_name, fs_cookie); |
94 | fsnotify(new_dir, new_dir_mask, new_dir, FSNOTIFY_EVENT_INODE, new_name, fs_cookie); | |
90586523 | 95 | |
75449536 | 96 | if (target) { |
7c297722 | 97 | inotify_inode_queue_event(target, IN_DELETE_SELF, 0, NULL, NULL); |
75449536 | 98 | inotify_inode_is_dead(target); |
90586523 EP |
99 | |
100 | /* this is really a link_count change not a removal */ | |
101 | fsnotify_link_count(target); | |
75449536 | 102 | } |
89204c40 JM |
103 | |
104 | if (source) { | |
7c297722 | 105 | inotify_inode_queue_event(source, IN_MOVE_SELF, 0, NULL, NULL); |
47882c6f | 106 | fsnotify(source, FS_MOVE_SELF, moved->d_inode, FSNOTIFY_EVENT_INODE, NULL, 0); |
89204c40 | 107 | } |
cccc6bba | 108 | audit_inode_child(moved, new_dir); |
0eeca283 RL |
109 | } |
110 | ||
3be25f49 EP |
111 | /* |
112 | * fsnotify_inode_delete - and inode is being evicted from cache, clean up is needed | |
113 | */ | |
114 | static inline void fsnotify_inode_delete(struct inode *inode) | |
115 | { | |
116 | __fsnotify_inode_delete(inode); | |
117 | } | |
118 | ||
7a91bf7f JM |
119 | /* |
120 | * fsnotify_nameremove - a filename was removed from a directory | |
121 | */ | |
122 | static inline void fsnotify_nameremove(struct dentry *dentry, int isdir) | |
123 | { | |
90586523 EP |
124 | __u32 mask = FS_DELETE; |
125 | ||
7a91bf7f | 126 | if (isdir) |
90586523 | 127 | mask |= FS_IN_ISDIR; |
c28f7e56 EP |
128 | |
129 | fsnotify_parent(dentry, mask); | |
7a91bf7f JM |
130 | } |
131 | ||
132 | /* | |
133 | * fsnotify_inoderemove - an inode is going away | |
134 | */ | |
135 | static inline void fsnotify_inoderemove(struct inode *inode) | |
136 | { | |
7c297722 | 137 | inotify_inode_queue_event(inode, IN_DELETE_SELF, 0, NULL, NULL); |
7a91bf7f | 138 | inotify_inode_is_dead(inode); |
7a91bf7f | 139 | |
47882c6f | 140 | fsnotify(inode, FS_DELETE_SELF, inode, FSNOTIFY_EVENT_INODE, NULL, 0); |
3be25f49 | 141 | __fsnotify_inode_delete(inode); |
ece95912 JK |
142 | } |
143 | ||
0eeca283 RL |
144 | /* |
145 | * fsnotify_create - 'name' was linked in | |
146 | */ | |
f38aa942 | 147 | static inline void fsnotify_create(struct inode *inode, struct dentry *dentry) |
0eeca283 | 148 | { |
7c297722 AG |
149 | inotify_inode_queue_event(inode, IN_CREATE, 0, dentry->d_name.name, |
150 | dentry->d_inode); | |
cccc6bba | 151 | audit_inode_child(dentry, inode); |
90586523 | 152 | |
47882c6f | 153 | fsnotify(inode, FS_CREATE, dentry->d_inode, FSNOTIFY_EVENT_INODE, dentry->d_name.name, 0); |
0eeca283 RL |
154 | } |
155 | ||
ece95912 JK |
156 | /* |
157 | * fsnotify_link - new hardlink in 'inode' directory | |
158 | * Note: We have to pass also the linked inode ptr as some filesystems leave | |
159 | * new_dentry->d_inode NULL and instantiate inode pointer later | |
160 | */ | |
161 | static inline void fsnotify_link(struct inode *dir, struct inode *inode, struct dentry *new_dentry) | |
162 | { | |
ece95912 JK |
163 | inotify_inode_queue_event(dir, IN_CREATE, 0, new_dentry->d_name.name, |
164 | inode); | |
165 | fsnotify_link_count(inode); | |
cccc6bba | 166 | audit_inode_child(new_dentry, dir); |
90586523 | 167 | |
47882c6f | 168 | fsnotify(dir, FS_CREATE, inode, FSNOTIFY_EVENT_INODE, new_dentry->d_name.name, 0); |
ece95912 JK |
169 | } |
170 | ||
0eeca283 RL |
171 | /* |
172 | * fsnotify_mkdir - directory 'name' was created | |
173 | */ | |
f38aa942 | 174 | static inline void fsnotify_mkdir(struct inode *inode, struct dentry *dentry) |
0eeca283 | 175 | { |
90586523 EP |
176 | __u32 mask = (FS_CREATE | FS_IN_ISDIR); |
177 | struct inode *d_inode = dentry->d_inode; | |
178 | ||
90586523 | 179 | inotify_inode_queue_event(inode, mask, 0, dentry->d_name.name, d_inode); |
cccc6bba | 180 | audit_inode_child(dentry, inode); |
90586523 | 181 | |
47882c6f | 182 | fsnotify(inode, mask, d_inode, FSNOTIFY_EVENT_INODE, dentry->d_name.name, 0); |
0eeca283 RL |
183 | } |
184 | ||
185 | /* | |
186 | * fsnotify_access - file was read | |
187 | */ | |
188 | static inline void fsnotify_access(struct dentry *dentry) | |
189 | { | |
190 | struct inode *inode = dentry->d_inode; | |
90586523 | 191 | __u32 mask = FS_ACCESS; |
0eeca283 RL |
192 | |
193 | if (S_ISDIR(inode->i_mode)) | |
90586523 | 194 | mask |= FS_IN_ISDIR; |
0eeca283 | 195 | |
7c297722 | 196 | inotify_inode_queue_event(inode, mask, 0, NULL, NULL); |
90586523 | 197 | |
c28f7e56 | 198 | fsnotify_parent(dentry, mask); |
47882c6f | 199 | fsnotify(inode, mask, inode, FSNOTIFY_EVENT_INODE, NULL, 0); |
0eeca283 RL |
200 | } |
201 | ||
202 | /* | |
203 | * fsnotify_modify - file was modified | |
204 | */ | |
205 | static inline void fsnotify_modify(struct dentry *dentry) | |
206 | { | |
207 | struct inode *inode = dentry->d_inode; | |
90586523 | 208 | __u32 mask = FS_MODIFY; |
0eeca283 RL |
209 | |
210 | if (S_ISDIR(inode->i_mode)) | |
90586523 | 211 | mask |= FS_IN_ISDIR; |
0eeca283 | 212 | |
7c297722 | 213 | inotify_inode_queue_event(inode, mask, 0, NULL, NULL); |
90586523 | 214 | |
c28f7e56 | 215 | fsnotify_parent(dentry, mask); |
47882c6f | 216 | fsnotify(inode, mask, inode, FSNOTIFY_EVENT_INODE, NULL, 0); |
0eeca283 RL |
217 | } |
218 | ||
219 | /* | |
220 | * fsnotify_open - file was opened | |
221 | */ | |
222 | static inline void fsnotify_open(struct dentry *dentry) | |
223 | { | |
224 | struct inode *inode = dentry->d_inode; | |
90586523 | 225 | __u32 mask = FS_OPEN; |
0eeca283 RL |
226 | |
227 | if (S_ISDIR(inode->i_mode)) | |
90586523 | 228 | mask |= FS_IN_ISDIR; |
0eeca283 | 229 | |
7c297722 | 230 | inotify_inode_queue_event(inode, mask, 0, NULL, NULL); |
90586523 | 231 | |
c28f7e56 | 232 | fsnotify_parent(dentry, mask); |
47882c6f | 233 | fsnotify(inode, mask, inode, FSNOTIFY_EVENT_INODE, NULL, 0); |
0eeca283 RL |
234 | } |
235 | ||
236 | /* | |
237 | * fsnotify_close - file was closed | |
238 | */ | |
239 | static inline void fsnotify_close(struct file *file) | |
240 | { | |
0f7fc9e4 | 241 | struct dentry *dentry = file->f_path.dentry; |
0eeca283 | 242 | struct inode *inode = dentry->d_inode; |
aeb5d727 | 243 | fmode_t mode = file->f_mode; |
90586523 | 244 | __u32 mask = (mode & FMODE_WRITE) ? FS_CLOSE_WRITE : FS_CLOSE_NOWRITE; |
0eeca283 RL |
245 | |
246 | if (S_ISDIR(inode->i_mode)) | |
90586523 | 247 | mask |= FS_IN_ISDIR; |
0eeca283 | 248 | |
7c297722 | 249 | inotify_inode_queue_event(inode, mask, 0, NULL, NULL); |
90586523 | 250 | |
c28f7e56 | 251 | fsnotify_parent(dentry, mask); |
47882c6f | 252 | fsnotify(inode, mask, file, FSNOTIFY_EVENT_FILE, NULL, 0); |
0eeca283 RL |
253 | } |
254 | ||
255 | /* | |
256 | * fsnotify_xattr - extended attributes were changed | |
257 | */ | |
258 | static inline void fsnotify_xattr(struct dentry *dentry) | |
259 | { | |
260 | struct inode *inode = dentry->d_inode; | |
90586523 | 261 | __u32 mask = FS_ATTRIB; |
0eeca283 RL |
262 | |
263 | if (S_ISDIR(inode->i_mode)) | |
90586523 | 264 | mask |= FS_IN_ISDIR; |
0eeca283 | 265 | |
7c297722 | 266 | inotify_inode_queue_event(inode, mask, 0, NULL, NULL); |
90586523 | 267 | |
c28f7e56 | 268 | fsnotify_parent(dentry, mask); |
47882c6f | 269 | fsnotify(inode, mask, inode, FSNOTIFY_EVENT_INODE, NULL, 0); |
0eeca283 RL |
270 | } |
271 | ||
272 | /* | |
273 | * fsnotify_change - notify_change event. file was modified and/or metadata | |
274 | * was changed. | |
275 | */ | |
276 | static inline void fsnotify_change(struct dentry *dentry, unsigned int ia_valid) | |
277 | { | |
278 | struct inode *inode = dentry->d_inode; | |
3c5119c0 EP |
279 | __u32 mask = 0; |
280 | ||
281 | if (ia_valid & ATTR_UID) | |
282 | mask |= FS_ATTRIB; | |
283 | if (ia_valid & ATTR_GID) | |
284 | mask |= FS_ATTRIB; | |
285 | if (ia_valid & ATTR_SIZE) | |
286 | mask |= FS_MODIFY; | |
0eeca283 | 287 | |
0eeca283 RL |
288 | /* both times implies a utime(s) call */ |
289 | if ((ia_valid & (ATTR_ATIME | ATTR_MTIME)) == (ATTR_ATIME | ATTR_MTIME)) | |
3c5119c0 EP |
290 | mask |= FS_ATTRIB; |
291 | else if (ia_valid & ATTR_ATIME) | |
292 | mask |= FS_ACCESS; | |
293 | else if (ia_valid & ATTR_MTIME) | |
294 | mask |= FS_MODIFY; | |
295 | ||
296 | if (ia_valid & ATTR_MODE) | |
297 | mask |= FS_ATTRIB; | |
0eeca283 | 298 | |
3c5119c0 | 299 | if (mask) { |
0eeca283 | 300 | if (S_ISDIR(inode->i_mode)) |
3c5119c0 EP |
301 | mask |= FS_IN_ISDIR; |
302 | inotify_inode_queue_event(inode, mask, 0, NULL, NULL); | |
c28f7e56 | 303 | |
3c5119c0 | 304 | fsnotify_parent(dentry, mask); |
47882c6f | 305 | fsnotify(inode, mask, inode, FSNOTIFY_EVENT_INODE, NULL, 0); |
0eeca283 RL |
306 | } |
307 | } | |
308 | ||
90586523 | 309 | #if defined(CONFIG_INOTIFY) || defined(CONFIG_FSNOTIFY) /* notify helpers */ |
0eeca283 RL |
310 | |
311 | /* | |
312 | * fsnotify_oldname_init - save off the old filename before we change it | |
313 | */ | |
314 | static inline const char *fsnotify_oldname_init(const char *name) | |
315 | { | |
316 | return kstrdup(name, GFP_KERNEL); | |
317 | } | |
318 | ||
319 | /* | |
320 | * fsnotify_oldname_free - free the name we got from fsnotify_oldname_init | |
321 | */ | |
322 | static inline void fsnotify_oldname_free(const char *old_name) | |
323 | { | |
324 | kfree(old_name); | |
325 | } | |
326 | ||
90586523 | 327 | #else /* CONFIG_INOTIFY || CONFIG_FSNOTIFY */ |
0eeca283 RL |
328 | |
329 | static inline const char *fsnotify_oldname_init(const char *name) | |
330 | { | |
331 | return NULL; | |
332 | } | |
333 | ||
334 | static inline void fsnotify_oldname_free(const char *old_name) | |
335 | { | |
336 | } | |
337 | ||
338 | #endif /* ! CONFIG_INOTIFY */ | |
339 | ||
0eeca283 | 340 | #endif /* _LINUX_FS_NOTIFY_H */ |