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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 | ||
90586523 | 14 | #include <linux/fsnotify_backend.h> |
73241ccc | 15 | #include <linux/audit.h> |
5a0e3ad6 | 16 | #include <linux/slab.h> |
0eeca283 | 17 | |
c32ccd87 NP |
18 | /* |
19 | * fsnotify_d_instantiate - instantiate a dentry for inode | |
20 | * Called with dcache_lock held. | |
21 | */ | |
e61ce867 EP |
22 | static inline void fsnotify_d_instantiate(struct dentry *dentry, |
23 | struct inode *inode) | |
c32ccd87 | 24 | { |
e61ce867 | 25 | __fsnotify_d_instantiate(dentry, inode); |
c32ccd87 NP |
26 | } |
27 | ||
c28f7e56 | 28 | /* Notify this dentry's parent about a child's events. */ |
72acc854 | 29 | static inline void fsnotify_parent(struct path *path, struct dentry *dentry, __u32 mask) |
c28f7e56 | 30 | { |
72acc854 AG |
31 | if (!dentry) |
32 | dentry = path->dentry; | |
28c60e37 | 33 | |
72acc854 | 34 | __fsnotify_parent(path, dentry, mask); |
c28f7e56 EP |
35 | } |
36 | ||
c32ccd87 | 37 | /* |
e61ce867 EP |
38 | * fsnotify_d_move - dentry has been moved |
39 | * Called with dcache_lock and dentry->d_lock held. | |
c32ccd87 | 40 | */ |
e61ce867 | 41 | static inline void fsnotify_d_move(struct dentry *dentry) |
c32ccd87 | 42 | { |
c28f7e56 | 43 | /* |
e61ce867 EP |
44 | * On move we need to update dentry->d_flags to indicate if the new parent |
45 | * cares about events from this dentry. | |
c28f7e56 | 46 | */ |
e61ce867 | 47 | __fsnotify_update_dcache_flags(dentry); |
c32ccd87 NP |
48 | } |
49 | ||
90586523 EP |
50 | /* |
51 | * fsnotify_link_count - inode's link count changed | |
52 | */ | |
53 | static inline void fsnotify_link_count(struct inode *inode) | |
54 | { | |
47882c6f | 55 | fsnotify(inode, FS_ATTRIB, inode, FSNOTIFY_EVENT_INODE, NULL, 0); |
90586523 EP |
56 | } |
57 | ||
0eeca283 RL |
58 | /* |
59 | * fsnotify_move - file old_name at old_dir was moved to new_name at new_dir | |
60 | */ | |
61 | static inline void fsnotify_move(struct inode *old_dir, struct inode *new_dir, | |
123df294 | 62 | const char *old_name, |
5a190ae6 | 63 | int isdir, struct inode *target, struct dentry *moved) |
0eeca283 | 64 | { |
5a190ae6 | 65 | struct inode *source = moved->d_inode; |
47882c6f | 66 | u32 fs_cookie = fsnotify_get_cookie(); |
ff52cc21 EP |
67 | __u32 old_dir_mask = (FS_EVENT_ON_CHILD | FS_MOVED_FROM); |
68 | __u32 new_dir_mask = (FS_EVENT_ON_CHILD | FS_MOVED_TO); | |
123df294 | 69 | const char *new_name = moved->d_name.name; |
0eeca283 | 70 | |
ff52cc21 EP |
71 | if (old_dir == new_dir) |
72 | old_dir_mask |= FS_DN_RENAME; | |
0eeca283 | 73 | |
90586523 | 74 | if (isdir) { |
90586523 EP |
75 | old_dir_mask |= FS_IN_ISDIR; |
76 | new_dir_mask |= FS_IN_ISDIR; | |
77 | } | |
78 | ||
47882c6f EP |
79 | fsnotify(old_dir, old_dir_mask, old_dir, FSNOTIFY_EVENT_INODE, old_name, fs_cookie); |
80 | fsnotify(new_dir, new_dir_mask, new_dir, FSNOTIFY_EVENT_INODE, new_name, fs_cookie); | |
90586523 | 81 | |
2dfc1cae | 82 | if (target) |
90586523 | 83 | fsnotify_link_count(target); |
89204c40 | 84 | |
2dfc1cae | 85 | if (source) |
47882c6f | 86 | fsnotify(source, FS_MOVE_SELF, moved->d_inode, FSNOTIFY_EVENT_INODE, NULL, 0); |
cccc6bba | 87 | audit_inode_child(moved, new_dir); |
0eeca283 RL |
88 | } |
89 | ||
3be25f49 EP |
90 | /* |
91 | * fsnotify_inode_delete - and inode is being evicted from cache, clean up is needed | |
92 | */ | |
93 | static inline void fsnotify_inode_delete(struct inode *inode) | |
94 | { | |
95 | __fsnotify_inode_delete(inode); | |
96 | } | |
97 | ||
ca9c726e AG |
98 | /* |
99 | * fsnotify_vfsmount_delete - a vfsmount is being destroyed, clean up is needed | |
100 | */ | |
101 | static inline void fsnotify_vfsmount_delete(struct vfsmount *mnt) | |
102 | { | |
103 | __fsnotify_vfsmount_delete(mnt); | |
104 | } | |
105 | ||
7a91bf7f JM |
106 | /* |
107 | * fsnotify_nameremove - a filename was removed from a directory | |
108 | */ | |
109 | static inline void fsnotify_nameremove(struct dentry *dentry, int isdir) | |
110 | { | |
90586523 EP |
111 | __u32 mask = FS_DELETE; |
112 | ||
7a91bf7f | 113 | if (isdir) |
90586523 | 114 | mask |= FS_IN_ISDIR; |
c28f7e56 | 115 | |
28c60e37 | 116 | fsnotify_parent(NULL, dentry, mask); |
7a91bf7f JM |
117 | } |
118 | ||
119 | /* | |
120 | * fsnotify_inoderemove - an inode is going away | |
121 | */ | |
122 | static inline void fsnotify_inoderemove(struct inode *inode) | |
123 | { | |
47882c6f | 124 | fsnotify(inode, FS_DELETE_SELF, inode, FSNOTIFY_EVENT_INODE, NULL, 0); |
3be25f49 | 125 | __fsnotify_inode_delete(inode); |
ece95912 JK |
126 | } |
127 | ||
0eeca283 RL |
128 | /* |
129 | * fsnotify_create - 'name' was linked in | |
130 | */ | |
f38aa942 | 131 | static inline void fsnotify_create(struct inode *inode, struct dentry *dentry) |
0eeca283 | 132 | { |
cccc6bba | 133 | audit_inode_child(dentry, inode); |
90586523 | 134 | |
47882c6f | 135 | fsnotify(inode, FS_CREATE, dentry->d_inode, FSNOTIFY_EVENT_INODE, dentry->d_name.name, 0); |
0eeca283 RL |
136 | } |
137 | ||
ece95912 JK |
138 | /* |
139 | * fsnotify_link - new hardlink in 'inode' directory | |
140 | * Note: We have to pass also the linked inode ptr as some filesystems leave | |
141 | * new_dentry->d_inode NULL and instantiate inode pointer later | |
142 | */ | |
143 | static inline void fsnotify_link(struct inode *dir, struct inode *inode, struct dentry *new_dentry) | |
144 | { | |
ece95912 | 145 | fsnotify_link_count(inode); |
cccc6bba | 146 | audit_inode_child(new_dentry, dir); |
90586523 | 147 | |
47882c6f | 148 | fsnotify(dir, FS_CREATE, inode, FSNOTIFY_EVENT_INODE, new_dentry->d_name.name, 0); |
ece95912 JK |
149 | } |
150 | ||
0eeca283 RL |
151 | /* |
152 | * fsnotify_mkdir - directory 'name' was created | |
153 | */ | |
f38aa942 | 154 | static inline void fsnotify_mkdir(struct inode *inode, struct dentry *dentry) |
0eeca283 | 155 | { |
90586523 EP |
156 | __u32 mask = (FS_CREATE | FS_IN_ISDIR); |
157 | struct inode *d_inode = dentry->d_inode; | |
158 | ||
cccc6bba | 159 | audit_inode_child(dentry, inode); |
90586523 | 160 | |
47882c6f | 161 | fsnotify(inode, mask, d_inode, FSNOTIFY_EVENT_INODE, dentry->d_name.name, 0); |
0eeca283 RL |
162 | } |
163 | ||
164 | /* | |
165 | * fsnotify_access - file was read | |
166 | */ | |
2a12a9d7 | 167 | static inline void fsnotify_access(struct file *file) |
0eeca283 | 168 | { |
72acc854 AG |
169 | struct path *path = &file->f_path; |
170 | struct inode *inode = path->dentry->d_inode; | |
90586523 | 171 | __u32 mask = FS_ACCESS; |
0eeca283 RL |
172 | |
173 | if (S_ISDIR(inode->i_mode)) | |
90586523 | 174 | mask |= FS_IN_ISDIR; |
0eeca283 | 175 | |
ecf081d1 EP |
176 | if (!(file->f_mode & FMODE_NONOTIFY)) { |
177 | fsnotify_parent(path, NULL, mask); | |
178 | fsnotify(inode, mask, path, FSNOTIFY_EVENT_PATH, NULL, 0); | |
179 | } | |
0eeca283 RL |
180 | } |
181 | ||
182 | /* | |
183 | * fsnotify_modify - file was modified | |
184 | */ | |
2a12a9d7 | 185 | static inline void fsnotify_modify(struct file *file) |
0eeca283 | 186 | { |
72acc854 AG |
187 | struct path *path = &file->f_path; |
188 | struct inode *inode = path->dentry->d_inode; | |
90586523 | 189 | __u32 mask = FS_MODIFY; |
0eeca283 RL |
190 | |
191 | if (S_ISDIR(inode->i_mode)) | |
90586523 | 192 | mask |= FS_IN_ISDIR; |
0eeca283 | 193 | |
ecf081d1 EP |
194 | if (!(file->f_mode & FMODE_NONOTIFY)) { |
195 | fsnotify_parent(path, NULL, mask); | |
196 | fsnotify(inode, mask, path, FSNOTIFY_EVENT_PATH, NULL, 0); | |
197 | } | |
0eeca283 RL |
198 | } |
199 | ||
200 | /* | |
201 | * fsnotify_open - file was opened | |
202 | */ | |
2a12a9d7 | 203 | static inline void fsnotify_open(struct file *file) |
0eeca283 | 204 | { |
72acc854 AG |
205 | struct path *path = &file->f_path; |
206 | struct inode *inode = path->dentry->d_inode; | |
90586523 | 207 | __u32 mask = FS_OPEN; |
0eeca283 RL |
208 | |
209 | if (S_ISDIR(inode->i_mode)) | |
90586523 | 210 | mask |= FS_IN_ISDIR; |
0eeca283 | 211 | |
ecf081d1 EP |
212 | if (!(file->f_mode & FMODE_NONOTIFY)) { |
213 | fsnotify_parent(path, NULL, mask); | |
214 | fsnotify(inode, mask, path, FSNOTIFY_EVENT_PATH, NULL, 0); | |
215 | } | |
0eeca283 RL |
216 | } |
217 | ||
218 | /* | |
219 | * fsnotify_close - file was closed | |
220 | */ | |
221 | static inline void fsnotify_close(struct file *file) | |
222 | { | |
72acc854 | 223 | struct path *path = &file->f_path; |
28c60e37 | 224 | struct inode *inode = file->f_path.dentry->d_inode; |
aeb5d727 | 225 | fmode_t mode = file->f_mode; |
90586523 | 226 | __u32 mask = (mode & FMODE_WRITE) ? FS_CLOSE_WRITE : FS_CLOSE_NOWRITE; |
0eeca283 RL |
227 | |
228 | if (S_ISDIR(inode->i_mode)) | |
90586523 | 229 | mask |= FS_IN_ISDIR; |
0eeca283 | 230 | |
ecf081d1 EP |
231 | if (!(file->f_mode & FMODE_NONOTIFY)) { |
232 | fsnotify_parent(path, NULL, mask); | |
233 | fsnotify(inode, mask, path, FSNOTIFY_EVENT_PATH, NULL, 0); | |
234 | } | |
0eeca283 RL |
235 | } |
236 | ||
237 | /* | |
238 | * fsnotify_xattr - extended attributes were changed | |
239 | */ | |
240 | static inline void fsnotify_xattr(struct dentry *dentry) | |
241 | { | |
242 | struct inode *inode = dentry->d_inode; | |
90586523 | 243 | __u32 mask = FS_ATTRIB; |
0eeca283 RL |
244 | |
245 | if (S_ISDIR(inode->i_mode)) | |
90586523 | 246 | mask |= FS_IN_ISDIR; |
0eeca283 | 247 | |
28c60e37 | 248 | fsnotify_parent(NULL, dentry, mask); |
47882c6f | 249 | fsnotify(inode, mask, inode, FSNOTIFY_EVENT_INODE, NULL, 0); |
0eeca283 RL |
250 | } |
251 | ||
252 | /* | |
253 | * fsnotify_change - notify_change event. file was modified and/or metadata | |
254 | * was changed. | |
255 | */ | |
256 | static inline void fsnotify_change(struct dentry *dentry, unsigned int ia_valid) | |
257 | { | |
258 | struct inode *inode = dentry->d_inode; | |
3c5119c0 EP |
259 | __u32 mask = 0; |
260 | ||
261 | if (ia_valid & ATTR_UID) | |
262 | mask |= FS_ATTRIB; | |
263 | if (ia_valid & ATTR_GID) | |
264 | mask |= FS_ATTRIB; | |
265 | if (ia_valid & ATTR_SIZE) | |
266 | mask |= FS_MODIFY; | |
0eeca283 | 267 | |
0eeca283 RL |
268 | /* both times implies a utime(s) call */ |
269 | if ((ia_valid & (ATTR_ATIME | ATTR_MTIME)) == (ATTR_ATIME | ATTR_MTIME)) | |
3c5119c0 EP |
270 | mask |= FS_ATTRIB; |
271 | else if (ia_valid & ATTR_ATIME) | |
272 | mask |= FS_ACCESS; | |
273 | else if (ia_valid & ATTR_MTIME) | |
274 | mask |= FS_MODIFY; | |
275 | ||
276 | if (ia_valid & ATTR_MODE) | |
277 | mask |= FS_ATTRIB; | |
0eeca283 | 278 | |
3c5119c0 | 279 | if (mask) { |
0eeca283 | 280 | if (S_ISDIR(inode->i_mode)) |
3c5119c0 | 281 | mask |= FS_IN_ISDIR; |
28c60e37 EP |
282 | |
283 | fsnotify_parent(NULL, dentry, mask); | |
47882c6f | 284 | fsnotify(inode, mask, inode, FSNOTIFY_EVENT_INODE, NULL, 0); |
0eeca283 RL |
285 | } |
286 | } | |
287 | ||
2dfc1cae | 288 | #if defined(CONFIG_FSNOTIFY) /* notify helpers */ |
0eeca283 RL |
289 | |
290 | /* | |
291 | * fsnotify_oldname_init - save off the old filename before we change it | |
292 | */ | |
293 | static inline const char *fsnotify_oldname_init(const char *name) | |
294 | { | |
295 | return kstrdup(name, GFP_KERNEL); | |
296 | } | |
297 | ||
298 | /* | |
299 | * fsnotify_oldname_free - free the name we got from fsnotify_oldname_init | |
300 | */ | |
301 | static inline void fsnotify_oldname_free(const char *old_name) | |
302 | { | |
303 | kfree(old_name); | |
304 | } | |
305 | ||
28c60e37 | 306 | #else /* CONFIG_FSNOTIFY */ |
0eeca283 RL |
307 | |
308 | static inline const char *fsnotify_oldname_init(const char *name) | |
309 | { | |
310 | return NULL; | |
311 | } | |
312 | ||
313 | static inline void fsnotify_oldname_free(const char *old_name) | |
314 | { | |
315 | } | |
316 | ||
28c60e37 | 317 | #endif /* CONFIG_FSNOTIFY */ |
0eeca283 | 318 | |
0eeca283 | 319 | #endif /* _LINUX_FS_NOTIFY_H */ |