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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> |
0eeca283 | 18 | |
c32ccd87 NP |
19 | /* |
20 | * fsnotify_d_instantiate - instantiate a dentry for inode | |
21 | * Called with dcache_lock held. | |
22 | */ | |
23 | static inline void fsnotify_d_instantiate(struct dentry *entry, | |
24 | struct inode *inode) | |
25 | { | |
c28f7e56 EP |
26 | __fsnotify_d_instantiate(entry, inode); |
27 | ||
c32ccd87 NP |
28 | inotify_d_instantiate(entry, inode); |
29 | } | |
30 | ||
c28f7e56 EP |
31 | /* Notify this dentry's parent about a child's events. */ |
32 | static inline void fsnotify_parent(struct dentry *dentry, __u32 mask) | |
33 | { | |
34 | __fsnotify_parent(dentry, mask); | |
35 | ||
36 | inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name); | |
37 | } | |
38 | ||
c32ccd87 NP |
39 | /* |
40 | * fsnotify_d_move - entry has been moved | |
41 | * Called with dcache_lock and entry->d_lock held. | |
42 | */ | |
43 | static inline void fsnotify_d_move(struct dentry *entry) | |
44 | { | |
c28f7e56 EP |
45 | /* |
46 | * On move we need to update entry->d_flags to indicate if the new parent | |
47 | * cares about events from this entry. | |
48 | */ | |
49 | __fsnotify_update_dcache_flags(entry); | |
50 | ||
c32ccd87 NP |
51 | inotify_d_move(entry); |
52 | } | |
53 | ||
90586523 EP |
54 | /* |
55 | * fsnotify_link_count - inode's link count changed | |
56 | */ | |
57 | static inline void fsnotify_link_count(struct inode *inode) | |
58 | { | |
59 | inotify_inode_queue_event(inode, IN_ATTRIB, 0, NULL, NULL); | |
60 | ||
47882c6f | 61 | fsnotify(inode, FS_ATTRIB, inode, FSNOTIFY_EVENT_INODE, NULL, 0); |
90586523 EP |
62 | } |
63 | ||
0eeca283 RL |
64 | /* |
65 | * fsnotify_move - file old_name at old_dir was moved to new_name at new_dir | |
66 | */ | |
67 | static inline void fsnotify_move(struct inode *old_dir, struct inode *new_dir, | |
123df294 | 68 | const char *old_name, |
5a190ae6 | 69 | int isdir, struct inode *target, struct dentry *moved) |
0eeca283 | 70 | { |
5a190ae6 | 71 | struct inode *source = moved->d_inode; |
47882c6f EP |
72 | u32 in_cookie = inotify_get_cookie(); |
73 | u32 fs_cookie = fsnotify_get_cookie(); | |
ff52cc21 EP |
74 | __u32 old_dir_mask = (FS_EVENT_ON_CHILD | FS_MOVED_FROM); |
75 | __u32 new_dir_mask = (FS_EVENT_ON_CHILD | FS_MOVED_TO); | |
123df294 | 76 | const char *new_name = moved->d_name.name; |
0eeca283 | 77 | |
ff52cc21 EP |
78 | if (old_dir == new_dir) |
79 | old_dir_mask |= FS_DN_RENAME; | |
0eeca283 | 80 | |
90586523 | 81 | if (isdir) { |
0eeca283 | 82 | isdir = IN_ISDIR; |
90586523 EP |
83 | old_dir_mask |= FS_IN_ISDIR; |
84 | new_dir_mask |= FS_IN_ISDIR; | |
85 | } | |
86 | ||
47882c6f | 87 | inotify_inode_queue_event(old_dir, IN_MOVED_FROM|isdir, in_cookie, old_name, |
7c297722 | 88 | source); |
47882c6f | 89 | inotify_inode_queue_event(new_dir, IN_MOVED_TO|isdir, in_cookie, new_name, |
7c297722 | 90 | source); |
75449536 | 91 | |
47882c6f EP |
92 | fsnotify(old_dir, old_dir_mask, old_dir, FSNOTIFY_EVENT_INODE, old_name, fs_cookie); |
93 | fsnotify(new_dir, new_dir_mask, new_dir, FSNOTIFY_EVENT_INODE, new_name, fs_cookie); | |
90586523 | 94 | |
75449536 | 95 | if (target) { |
7c297722 | 96 | inotify_inode_queue_event(target, IN_DELETE_SELF, 0, NULL, NULL); |
75449536 | 97 | inotify_inode_is_dead(target); |
90586523 EP |
98 | |
99 | /* this is really a link_count change not a removal */ | |
100 | fsnotify_link_count(target); | |
75449536 | 101 | } |
89204c40 JM |
102 | |
103 | if (source) { | |
7c297722 | 104 | inotify_inode_queue_event(source, IN_MOVE_SELF, 0, NULL, NULL); |
47882c6f | 105 | fsnotify(source, FS_MOVE_SELF, moved->d_inode, FSNOTIFY_EVENT_INODE, NULL, 0); |
89204c40 | 106 | } |
cccc6bba | 107 | audit_inode_child(moved, new_dir); |
0eeca283 RL |
108 | } |
109 | ||
3be25f49 EP |
110 | /* |
111 | * fsnotify_inode_delete - and inode is being evicted from cache, clean up is needed | |
112 | */ | |
113 | static inline void fsnotify_inode_delete(struct inode *inode) | |
114 | { | |
115 | __fsnotify_inode_delete(inode); | |
116 | } | |
117 | ||
7a91bf7f JM |
118 | /* |
119 | * fsnotify_nameremove - a filename was removed from a directory | |
120 | */ | |
121 | static inline void fsnotify_nameremove(struct dentry *dentry, int isdir) | |
122 | { | |
90586523 EP |
123 | __u32 mask = FS_DELETE; |
124 | ||
7a91bf7f | 125 | if (isdir) |
90586523 | 126 | mask |= FS_IN_ISDIR; |
c28f7e56 EP |
127 | |
128 | fsnotify_parent(dentry, mask); | |
7a91bf7f JM |
129 | } |
130 | ||
131 | /* | |
132 | * fsnotify_inoderemove - an inode is going away | |
133 | */ | |
134 | static inline void fsnotify_inoderemove(struct inode *inode) | |
135 | { | |
7c297722 | 136 | inotify_inode_queue_event(inode, IN_DELETE_SELF, 0, NULL, NULL); |
7a91bf7f | 137 | inotify_inode_is_dead(inode); |
7a91bf7f | 138 | |
47882c6f | 139 | fsnotify(inode, FS_DELETE_SELF, inode, FSNOTIFY_EVENT_INODE, NULL, 0); |
3be25f49 | 140 | __fsnotify_inode_delete(inode); |
ece95912 JK |
141 | } |
142 | ||
0eeca283 RL |
143 | /* |
144 | * fsnotify_create - 'name' was linked in | |
145 | */ | |
f38aa942 | 146 | static inline void fsnotify_create(struct inode *inode, struct dentry *dentry) |
0eeca283 | 147 | { |
7c297722 AG |
148 | inotify_inode_queue_event(inode, IN_CREATE, 0, dentry->d_name.name, |
149 | dentry->d_inode); | |
cccc6bba | 150 | audit_inode_child(dentry, inode); |
90586523 | 151 | |
47882c6f | 152 | fsnotify(inode, FS_CREATE, dentry->d_inode, FSNOTIFY_EVENT_INODE, dentry->d_name.name, 0); |
0eeca283 RL |
153 | } |
154 | ||
ece95912 JK |
155 | /* |
156 | * fsnotify_link - new hardlink in 'inode' directory | |
157 | * Note: We have to pass also the linked inode ptr as some filesystems leave | |
158 | * new_dentry->d_inode NULL and instantiate inode pointer later | |
159 | */ | |
160 | static inline void fsnotify_link(struct inode *dir, struct inode *inode, struct dentry *new_dentry) | |
161 | { | |
ece95912 JK |
162 | inotify_inode_queue_event(dir, IN_CREATE, 0, new_dentry->d_name.name, |
163 | inode); | |
164 | fsnotify_link_count(inode); | |
cccc6bba | 165 | audit_inode_child(new_dentry, dir); |
90586523 | 166 | |
47882c6f | 167 | fsnotify(dir, FS_CREATE, inode, FSNOTIFY_EVENT_INODE, new_dentry->d_name.name, 0); |
ece95912 JK |
168 | } |
169 | ||
0eeca283 RL |
170 | /* |
171 | * fsnotify_mkdir - directory 'name' was created | |
172 | */ | |
f38aa942 | 173 | static inline void fsnotify_mkdir(struct inode *inode, struct dentry *dentry) |
0eeca283 | 174 | { |
90586523 EP |
175 | __u32 mask = (FS_CREATE | FS_IN_ISDIR); |
176 | struct inode *d_inode = dentry->d_inode; | |
177 | ||
90586523 | 178 | inotify_inode_queue_event(inode, mask, 0, dentry->d_name.name, d_inode); |
cccc6bba | 179 | audit_inode_child(dentry, inode); |
90586523 | 180 | |
47882c6f | 181 | fsnotify(inode, mask, d_inode, FSNOTIFY_EVENT_INODE, dentry->d_name.name, 0); |
0eeca283 RL |
182 | } |
183 | ||
184 | /* | |
185 | * fsnotify_access - file was read | |
186 | */ | |
187 | static inline void fsnotify_access(struct dentry *dentry) | |
188 | { | |
189 | struct inode *inode = dentry->d_inode; | |
90586523 | 190 | __u32 mask = FS_ACCESS; |
0eeca283 RL |
191 | |
192 | if (S_ISDIR(inode->i_mode)) | |
90586523 | 193 | mask |= FS_IN_ISDIR; |
0eeca283 | 194 | |
7c297722 | 195 | inotify_inode_queue_event(inode, mask, 0, NULL, NULL); |
90586523 | 196 | |
c28f7e56 | 197 | fsnotify_parent(dentry, mask); |
47882c6f | 198 | fsnotify(inode, mask, inode, FSNOTIFY_EVENT_INODE, NULL, 0); |
0eeca283 RL |
199 | } |
200 | ||
201 | /* | |
202 | * fsnotify_modify - file was modified | |
203 | */ | |
204 | static inline void fsnotify_modify(struct dentry *dentry) | |
205 | { | |
206 | struct inode *inode = dentry->d_inode; | |
90586523 | 207 | __u32 mask = FS_MODIFY; |
0eeca283 RL |
208 | |
209 | if (S_ISDIR(inode->i_mode)) | |
90586523 | 210 | mask |= FS_IN_ISDIR; |
0eeca283 | 211 | |
7c297722 | 212 | inotify_inode_queue_event(inode, mask, 0, NULL, NULL); |
90586523 | 213 | |
c28f7e56 | 214 | fsnotify_parent(dentry, mask); |
47882c6f | 215 | fsnotify(inode, mask, inode, FSNOTIFY_EVENT_INODE, NULL, 0); |
0eeca283 RL |
216 | } |
217 | ||
218 | /* | |
219 | * fsnotify_open - file was opened | |
220 | */ | |
221 | static inline void fsnotify_open(struct dentry *dentry) | |
222 | { | |
223 | struct inode *inode = dentry->d_inode; | |
90586523 | 224 | __u32 mask = FS_OPEN; |
0eeca283 RL |
225 | |
226 | if (S_ISDIR(inode->i_mode)) | |
90586523 | 227 | mask |= FS_IN_ISDIR; |
0eeca283 | 228 | |
7c297722 | 229 | inotify_inode_queue_event(inode, mask, 0, NULL, NULL); |
90586523 | 230 | |
c28f7e56 | 231 | fsnotify_parent(dentry, mask); |
47882c6f | 232 | fsnotify(inode, mask, inode, FSNOTIFY_EVENT_INODE, NULL, 0); |
0eeca283 RL |
233 | } |
234 | ||
235 | /* | |
236 | * fsnotify_close - file was closed | |
237 | */ | |
238 | static inline void fsnotify_close(struct file *file) | |
239 | { | |
0f7fc9e4 | 240 | struct dentry *dentry = file->f_path.dentry; |
0eeca283 | 241 | struct inode *inode = dentry->d_inode; |
aeb5d727 | 242 | fmode_t mode = file->f_mode; |
90586523 | 243 | __u32 mask = (mode & FMODE_WRITE) ? FS_CLOSE_WRITE : FS_CLOSE_NOWRITE; |
0eeca283 RL |
244 | |
245 | if (S_ISDIR(inode->i_mode)) | |
90586523 | 246 | mask |= FS_IN_ISDIR; |
0eeca283 | 247 | |
7c297722 | 248 | inotify_inode_queue_event(inode, mask, 0, NULL, NULL); |
90586523 | 249 | |
c28f7e56 | 250 | fsnotify_parent(dentry, mask); |
47882c6f | 251 | fsnotify(inode, mask, file, FSNOTIFY_EVENT_FILE, NULL, 0); |
0eeca283 RL |
252 | } |
253 | ||
254 | /* | |
255 | * fsnotify_xattr - extended attributes were changed | |
256 | */ | |
257 | static inline void fsnotify_xattr(struct dentry *dentry) | |
258 | { | |
259 | struct inode *inode = dentry->d_inode; | |
90586523 | 260 | __u32 mask = FS_ATTRIB; |
0eeca283 RL |
261 | |
262 | if (S_ISDIR(inode->i_mode)) | |
90586523 | 263 | mask |= FS_IN_ISDIR; |
0eeca283 | 264 | |
7c297722 | 265 | inotify_inode_queue_event(inode, mask, 0, NULL, NULL); |
90586523 | 266 | |
c28f7e56 | 267 | fsnotify_parent(dentry, mask); |
47882c6f | 268 | fsnotify(inode, mask, inode, FSNOTIFY_EVENT_INODE, NULL, 0); |
0eeca283 RL |
269 | } |
270 | ||
271 | /* | |
272 | * fsnotify_change - notify_change event. file was modified and/or metadata | |
273 | * was changed. | |
274 | */ | |
275 | static inline void fsnotify_change(struct dentry *dentry, unsigned int ia_valid) | |
276 | { | |
277 | struct inode *inode = dentry->d_inode; | |
3c5119c0 EP |
278 | __u32 mask = 0; |
279 | ||
280 | if (ia_valid & ATTR_UID) | |
281 | mask |= FS_ATTRIB; | |
282 | if (ia_valid & ATTR_GID) | |
283 | mask |= FS_ATTRIB; | |
284 | if (ia_valid & ATTR_SIZE) | |
285 | mask |= FS_MODIFY; | |
0eeca283 | 286 | |
0eeca283 RL |
287 | /* both times implies a utime(s) call */ |
288 | if ((ia_valid & (ATTR_ATIME | ATTR_MTIME)) == (ATTR_ATIME | ATTR_MTIME)) | |
3c5119c0 EP |
289 | mask |= FS_ATTRIB; |
290 | else if (ia_valid & ATTR_ATIME) | |
291 | mask |= FS_ACCESS; | |
292 | else if (ia_valid & ATTR_MTIME) | |
293 | mask |= FS_MODIFY; | |
294 | ||
295 | if (ia_valid & ATTR_MODE) | |
296 | mask |= FS_ATTRIB; | |
0eeca283 | 297 | |
3c5119c0 | 298 | if (mask) { |
0eeca283 | 299 | if (S_ISDIR(inode->i_mode)) |
3c5119c0 EP |
300 | mask |= FS_IN_ISDIR; |
301 | inotify_inode_queue_event(inode, mask, 0, NULL, NULL); | |
c28f7e56 | 302 | |
3c5119c0 | 303 | fsnotify_parent(dentry, mask); |
47882c6f | 304 | fsnotify(inode, mask, inode, FSNOTIFY_EVENT_INODE, NULL, 0); |
0eeca283 RL |
305 | } |
306 | } | |
307 | ||
90586523 | 308 | #if defined(CONFIG_INOTIFY) || defined(CONFIG_FSNOTIFY) /* notify helpers */ |
0eeca283 RL |
309 | |
310 | /* | |
311 | * fsnotify_oldname_init - save off the old filename before we change it | |
312 | */ | |
313 | static inline const char *fsnotify_oldname_init(const char *name) | |
314 | { | |
315 | return kstrdup(name, GFP_KERNEL); | |
316 | } | |
317 | ||
318 | /* | |
319 | * fsnotify_oldname_free - free the name we got from fsnotify_oldname_init | |
320 | */ | |
321 | static inline void fsnotify_oldname_free(const char *old_name) | |
322 | { | |
323 | kfree(old_name); | |
324 | } | |
325 | ||
90586523 | 326 | #else /* CONFIG_INOTIFY || CONFIG_FSNOTIFY */ |
0eeca283 RL |
327 | |
328 | static inline const char *fsnotify_oldname_init(const char *name) | |
329 | { | |
330 | return NULL; | |
331 | } | |
332 | ||
333 | static inline void fsnotify_oldname_free(const char *old_name) | |
334 | { | |
335 | } | |
336 | ||
337 | #endif /* ! CONFIG_INOTIFY */ | |
338 | ||
0eeca283 | 339 | #endif /* _LINUX_FS_NOTIFY_H */ |