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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 | ||
61 | fsnotify(inode, FS_ATTRIB, inode, FSNOTIFY_EVENT_INODE); | |
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, | |
68 | const char *old_name, const char *new_name, | |
5a190ae6 | 69 | int isdir, struct inode *target, struct dentry *moved) |
0eeca283 | 70 | { |
5a190ae6 | 71 | struct inode *source = moved->d_inode; |
0eeca283 | 72 | u32 cookie = inotify_get_cookie(); |
90586523 EP |
73 | __u32 old_dir_mask = 0; |
74 | __u32 new_dir_mask = 0; | |
0eeca283 | 75 | |
90586523 | 76 | if (old_dir == new_dir) { |
0eeca283 | 77 | inode_dir_notify(old_dir, DN_RENAME); |
90586523 EP |
78 | old_dir_mask = FS_DN_RENAME; |
79 | } else { | |
0eeca283 | 80 | inode_dir_notify(old_dir, DN_DELETE); |
90586523 | 81 | old_dir_mask = FS_DELETE; |
0eeca283 | 82 | inode_dir_notify(new_dir, DN_CREATE); |
90586523 | 83 | new_dir_mask = FS_CREATE; |
0eeca283 RL |
84 | } |
85 | ||
90586523 | 86 | if (isdir) { |
0eeca283 | 87 | isdir = IN_ISDIR; |
90586523 EP |
88 | old_dir_mask |= FS_IN_ISDIR; |
89 | new_dir_mask |= FS_IN_ISDIR; | |
90 | } | |
91 | ||
92 | old_dir_mask |= FS_MOVED_FROM; | |
93 | new_dir_mask |= FS_MOVED_TO; | |
94 | ||
7c297722 AG |
95 | inotify_inode_queue_event(old_dir, IN_MOVED_FROM|isdir,cookie,old_name, |
96 | source); | |
97 | inotify_inode_queue_event(new_dir, IN_MOVED_TO|isdir, cookie, new_name, | |
98 | source); | |
75449536 | 99 | |
90586523 EP |
100 | fsnotify(old_dir, old_dir_mask, old_dir, FSNOTIFY_EVENT_INODE); |
101 | fsnotify(new_dir, new_dir_mask, new_dir, FSNOTIFY_EVENT_INODE); | |
102 | ||
75449536 | 103 | if (target) { |
7c297722 | 104 | inotify_inode_queue_event(target, IN_DELETE_SELF, 0, NULL, NULL); |
75449536 | 105 | inotify_inode_is_dead(target); |
90586523 EP |
106 | |
107 | /* this is really a link_count change not a removal */ | |
108 | fsnotify_link_count(target); | |
75449536 | 109 | } |
89204c40 JM |
110 | |
111 | if (source) { | |
7c297722 | 112 | inotify_inode_queue_event(source, IN_MOVE_SELF, 0, NULL, NULL); |
90586523 | 113 | fsnotify(source, FS_MOVE_SELF, moved->d_inode, FSNOTIFY_EVENT_INODE); |
89204c40 | 114 | } |
5a190ae6 | 115 | audit_inode_child(new_name, moved, new_dir); |
0eeca283 RL |
116 | } |
117 | ||
3be25f49 EP |
118 | /* |
119 | * fsnotify_inode_delete - and inode is being evicted from cache, clean up is needed | |
120 | */ | |
121 | static inline void fsnotify_inode_delete(struct inode *inode) | |
122 | { | |
123 | __fsnotify_inode_delete(inode); | |
124 | } | |
125 | ||
7a91bf7f JM |
126 | /* |
127 | * fsnotify_nameremove - a filename was removed from a directory | |
128 | */ | |
129 | static inline void fsnotify_nameremove(struct dentry *dentry, int isdir) | |
130 | { | |
90586523 EP |
131 | __u32 mask = FS_DELETE; |
132 | ||
7a91bf7f | 133 | if (isdir) |
90586523 | 134 | mask |= FS_IN_ISDIR; |
7a91bf7f | 135 | dnotify_parent(dentry, DN_DELETE); |
c28f7e56 EP |
136 | |
137 | fsnotify_parent(dentry, mask); | |
7a91bf7f JM |
138 | } |
139 | ||
140 | /* | |
141 | * fsnotify_inoderemove - an inode is going away | |
142 | */ | |
143 | static inline void fsnotify_inoderemove(struct inode *inode) | |
144 | { | |
7c297722 | 145 | inotify_inode_queue_event(inode, IN_DELETE_SELF, 0, NULL, NULL); |
7a91bf7f | 146 | inotify_inode_is_dead(inode); |
7a91bf7f | 147 | |
90586523 | 148 | fsnotify(inode, FS_DELETE_SELF, inode, FSNOTIFY_EVENT_INODE); |
3be25f49 | 149 | __fsnotify_inode_delete(inode); |
ece95912 JK |
150 | } |
151 | ||
0eeca283 RL |
152 | /* |
153 | * fsnotify_create - 'name' was linked in | |
154 | */ | |
f38aa942 | 155 | static inline void fsnotify_create(struct inode *inode, struct dentry *dentry) |
0eeca283 RL |
156 | { |
157 | inode_dir_notify(inode, DN_CREATE); | |
7c297722 AG |
158 | inotify_inode_queue_event(inode, IN_CREATE, 0, dentry->d_name.name, |
159 | dentry->d_inode); | |
5a190ae6 | 160 | audit_inode_child(dentry->d_name.name, dentry, inode); |
90586523 EP |
161 | |
162 | fsnotify(inode, FS_CREATE, dentry->d_inode, FSNOTIFY_EVENT_INODE); | |
0eeca283 RL |
163 | } |
164 | ||
ece95912 JK |
165 | /* |
166 | * fsnotify_link - new hardlink in 'inode' directory | |
167 | * Note: We have to pass also the linked inode ptr as some filesystems leave | |
168 | * new_dentry->d_inode NULL and instantiate inode pointer later | |
169 | */ | |
170 | static inline void fsnotify_link(struct inode *dir, struct inode *inode, struct dentry *new_dentry) | |
171 | { | |
172 | inode_dir_notify(dir, DN_CREATE); | |
173 | inotify_inode_queue_event(dir, IN_CREATE, 0, new_dentry->d_name.name, | |
174 | inode); | |
175 | fsnotify_link_count(inode); | |
176 | audit_inode_child(new_dentry->d_name.name, new_dentry, dir); | |
90586523 EP |
177 | |
178 | fsnotify(dir, FS_CREATE, inode, FSNOTIFY_EVENT_INODE); | |
ece95912 JK |
179 | } |
180 | ||
0eeca283 RL |
181 | /* |
182 | * fsnotify_mkdir - directory 'name' was created | |
183 | */ | |
f38aa942 | 184 | static inline void fsnotify_mkdir(struct inode *inode, struct dentry *dentry) |
0eeca283 | 185 | { |
90586523 EP |
186 | __u32 mask = (FS_CREATE | FS_IN_ISDIR); |
187 | struct inode *d_inode = dentry->d_inode; | |
188 | ||
0eeca283 | 189 | inode_dir_notify(inode, DN_CREATE); |
90586523 | 190 | inotify_inode_queue_event(inode, mask, 0, dentry->d_name.name, d_inode); |
5a190ae6 | 191 | audit_inode_child(dentry->d_name.name, dentry, inode); |
90586523 EP |
192 | |
193 | fsnotify(inode, mask, d_inode, FSNOTIFY_EVENT_INODE); | |
0eeca283 RL |
194 | } |
195 | ||
196 | /* | |
197 | * fsnotify_access - file was read | |
198 | */ | |
199 | static inline void fsnotify_access(struct dentry *dentry) | |
200 | { | |
201 | struct inode *inode = dentry->d_inode; | |
90586523 | 202 | __u32 mask = FS_ACCESS; |
0eeca283 RL |
203 | |
204 | if (S_ISDIR(inode->i_mode)) | |
90586523 | 205 | mask |= FS_IN_ISDIR; |
0eeca283 RL |
206 | |
207 | dnotify_parent(dentry, DN_ACCESS); | |
7c297722 | 208 | inotify_inode_queue_event(inode, mask, 0, NULL, NULL); |
90586523 | 209 | |
c28f7e56 | 210 | fsnotify_parent(dentry, mask); |
90586523 | 211 | fsnotify(inode, mask, inode, FSNOTIFY_EVENT_INODE); |
0eeca283 RL |
212 | } |
213 | ||
214 | /* | |
215 | * fsnotify_modify - file was modified | |
216 | */ | |
217 | static inline void fsnotify_modify(struct dentry *dentry) | |
218 | { | |
219 | struct inode *inode = dentry->d_inode; | |
90586523 | 220 | __u32 mask = FS_MODIFY; |
0eeca283 RL |
221 | |
222 | if (S_ISDIR(inode->i_mode)) | |
90586523 | 223 | mask |= FS_IN_ISDIR; |
0eeca283 RL |
224 | |
225 | dnotify_parent(dentry, DN_MODIFY); | |
7c297722 | 226 | inotify_inode_queue_event(inode, mask, 0, NULL, NULL); |
90586523 | 227 | |
c28f7e56 | 228 | fsnotify_parent(dentry, mask); |
90586523 | 229 | fsnotify(inode, mask, inode, FSNOTIFY_EVENT_INODE); |
0eeca283 RL |
230 | } |
231 | ||
232 | /* | |
233 | * fsnotify_open - file was opened | |
234 | */ | |
235 | static inline void fsnotify_open(struct dentry *dentry) | |
236 | { | |
237 | struct inode *inode = dentry->d_inode; | |
90586523 | 238 | __u32 mask = FS_OPEN; |
0eeca283 RL |
239 | |
240 | if (S_ISDIR(inode->i_mode)) | |
90586523 | 241 | mask |= FS_IN_ISDIR; |
0eeca283 | 242 | |
7c297722 | 243 | inotify_inode_queue_event(inode, mask, 0, NULL, NULL); |
90586523 | 244 | |
c28f7e56 | 245 | fsnotify_parent(dentry, mask); |
90586523 | 246 | fsnotify(inode, mask, inode, FSNOTIFY_EVENT_INODE); |
0eeca283 RL |
247 | } |
248 | ||
249 | /* | |
250 | * fsnotify_close - file was closed | |
251 | */ | |
252 | static inline void fsnotify_close(struct file *file) | |
253 | { | |
0f7fc9e4 | 254 | struct dentry *dentry = file->f_path.dentry; |
0eeca283 | 255 | struct inode *inode = dentry->d_inode; |
aeb5d727 | 256 | fmode_t mode = file->f_mode; |
90586523 | 257 | __u32 mask = (mode & FMODE_WRITE) ? FS_CLOSE_WRITE : FS_CLOSE_NOWRITE; |
0eeca283 RL |
258 | |
259 | if (S_ISDIR(inode->i_mode)) | |
90586523 | 260 | mask |= FS_IN_ISDIR; |
0eeca283 | 261 | |
7c297722 | 262 | inotify_inode_queue_event(inode, mask, 0, NULL, NULL); |
90586523 | 263 | |
c28f7e56 | 264 | fsnotify_parent(dentry, mask); |
90586523 | 265 | fsnotify(inode, mask, file, FSNOTIFY_EVENT_FILE); |
0eeca283 RL |
266 | } |
267 | ||
268 | /* | |
269 | * fsnotify_xattr - extended attributes were changed | |
270 | */ | |
271 | static inline void fsnotify_xattr(struct dentry *dentry) | |
272 | { | |
273 | struct inode *inode = dentry->d_inode; | |
90586523 | 274 | __u32 mask = FS_ATTRIB; |
0eeca283 RL |
275 | |
276 | if (S_ISDIR(inode->i_mode)) | |
90586523 | 277 | mask |= FS_IN_ISDIR; |
0eeca283 | 278 | |
7c297722 | 279 | inotify_inode_queue_event(inode, mask, 0, NULL, NULL); |
90586523 | 280 | |
c28f7e56 | 281 | fsnotify_parent(dentry, mask); |
90586523 | 282 | fsnotify(inode, mask, inode, FSNOTIFY_EVENT_INODE); |
0eeca283 RL |
283 | } |
284 | ||
285 | /* | |
286 | * fsnotify_change - notify_change event. file was modified and/or metadata | |
287 | * was changed. | |
288 | */ | |
289 | static inline void fsnotify_change(struct dentry *dentry, unsigned int ia_valid) | |
290 | { | |
291 | struct inode *inode = dentry->d_inode; | |
292 | int dn_mask = 0; | |
90586523 | 293 | __u32 in_mask = 0; |
0eeca283 RL |
294 | |
295 | if (ia_valid & ATTR_UID) { | |
90586523 | 296 | in_mask |= FS_ATTRIB; |
0eeca283 RL |
297 | dn_mask |= DN_ATTRIB; |
298 | } | |
299 | if (ia_valid & ATTR_GID) { | |
90586523 | 300 | in_mask |= FS_ATTRIB; |
0eeca283 RL |
301 | dn_mask |= DN_ATTRIB; |
302 | } | |
303 | if (ia_valid & ATTR_SIZE) { | |
90586523 | 304 | in_mask |= FS_MODIFY; |
0eeca283 RL |
305 | dn_mask |= DN_MODIFY; |
306 | } | |
307 | /* both times implies a utime(s) call */ | |
308 | if ((ia_valid & (ATTR_ATIME | ATTR_MTIME)) == (ATTR_ATIME | ATTR_MTIME)) | |
309 | { | |
90586523 | 310 | in_mask |= FS_ATTRIB; |
0eeca283 RL |
311 | dn_mask |= DN_ATTRIB; |
312 | } else if (ia_valid & ATTR_ATIME) { | |
90586523 | 313 | in_mask |= FS_ACCESS; |
0eeca283 RL |
314 | dn_mask |= DN_ACCESS; |
315 | } else if (ia_valid & ATTR_MTIME) { | |
90586523 | 316 | in_mask |= FS_MODIFY; |
0eeca283 RL |
317 | dn_mask |= DN_MODIFY; |
318 | } | |
319 | if (ia_valid & ATTR_MODE) { | |
90586523 | 320 | in_mask |= FS_ATTRIB; |
0eeca283 RL |
321 | dn_mask |= DN_ATTRIB; |
322 | } | |
323 | ||
324 | if (dn_mask) | |
325 | dnotify_parent(dentry, dn_mask); | |
326 | if (in_mask) { | |
327 | if (S_ISDIR(inode->i_mode)) | |
90586523 | 328 | in_mask |= FS_IN_ISDIR; |
7c297722 | 329 | inotify_inode_queue_event(inode, in_mask, 0, NULL, NULL); |
c28f7e56 EP |
330 | |
331 | fsnotify_parent(dentry, in_mask); | |
90586523 | 332 | fsnotify(inode, in_mask, inode, FSNOTIFY_EVENT_INODE); |
0eeca283 RL |
333 | } |
334 | } | |
335 | ||
90586523 | 336 | #if defined(CONFIG_INOTIFY) || defined(CONFIG_FSNOTIFY) /* notify helpers */ |
0eeca283 RL |
337 | |
338 | /* | |
339 | * fsnotify_oldname_init - save off the old filename before we change it | |
340 | */ | |
341 | static inline const char *fsnotify_oldname_init(const char *name) | |
342 | { | |
343 | return kstrdup(name, GFP_KERNEL); | |
344 | } | |
345 | ||
346 | /* | |
347 | * fsnotify_oldname_free - free the name we got from fsnotify_oldname_init | |
348 | */ | |
349 | static inline void fsnotify_oldname_free(const char *old_name) | |
350 | { | |
351 | kfree(old_name); | |
352 | } | |
353 | ||
90586523 | 354 | #else /* CONFIG_INOTIFY || CONFIG_FSNOTIFY */ |
0eeca283 RL |
355 | |
356 | static inline const char *fsnotify_oldname_init(const char *name) | |
357 | { | |
358 | return NULL; | |
359 | } | |
360 | ||
361 | static inline void fsnotify_oldname_free(const char *old_name) | |
362 | { | |
363 | } | |
364 | ||
365 | #endif /* ! CONFIG_INOTIFY */ | |
366 | ||
0eeca283 | 367 | #endif /* _LINUX_FS_NOTIFY_H */ |