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1 #ifndef _LINUX_FS_NOTIFY_H
2 #define _LINUX_FS_NOTIFY_H
5 * include/linux/fsnotify.h - generic hooks for filesystem notification, to
6 * reduce in-source duplication from both dnotify and inotify.
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.
11 * (C) Copyright 2005 Robert Love
14 #include <linux/fsnotify_backend.h>
15 #include <linux/audit.h>
16 #include <linux/slab.h>
19 * fsnotify_d_instantiate - instantiate a dentry for inode
20 * Called with dcache_lock held.
22 static inline void fsnotify_d_instantiate(struct dentry
*dentry
,
25 __fsnotify_d_instantiate(dentry
, inode
);
28 /* Notify this dentry's parent about a child's events. */
29 static inline void fsnotify_parent(struct path
*path
, struct dentry
*dentry
, __u32 mask
)
32 dentry
= path
->dentry
;
34 __fsnotify_parent(path
, dentry
, mask
);
37 /* simple call site for access decisions */
38 static inline int fsnotify_perm(struct file
*file
, int mask
)
40 struct path
*path
= &file
->f_path
;
41 struct inode
*inode
= path
->dentry
->d_inode
;
44 if (file
->f_mode
& FMODE_NONOTIFY
)
46 if (!(mask
& (MAY_READ
| MAY_OPEN
)))
49 fsnotify_mask
= FS_ACCESS_PERM
;
51 fsnotify_mask
= FS_OPEN_PERM
;
53 return fsnotify(inode
, fsnotify_mask
, path
, FSNOTIFY_EVENT_PATH
, NULL
, 0);
57 * fsnotify_d_move - dentry has been moved
58 * Called with dcache_lock and dentry->d_lock held.
60 static inline void fsnotify_d_move(struct dentry
*dentry
)
63 * On move we need to update dentry->d_flags to indicate if the new parent
64 * cares about events from this dentry.
66 __fsnotify_update_dcache_flags(dentry
);
70 * fsnotify_link_count - inode's link count changed
72 static inline void fsnotify_link_count(struct inode
*inode
)
74 fsnotify(inode
, FS_ATTRIB
, inode
, FSNOTIFY_EVENT_INODE
, NULL
, 0);
78 * fsnotify_move - file old_name at old_dir was moved to new_name at new_dir
80 static inline void fsnotify_move(struct inode
*old_dir
, struct inode
*new_dir
,
81 const unsigned char *old_name
,
82 int isdir
, struct inode
*target
, struct dentry
*moved
)
84 struct inode
*source
= moved
->d_inode
;
85 u32 fs_cookie
= fsnotify_get_cookie();
86 __u32 old_dir_mask
= (FS_EVENT_ON_CHILD
| FS_MOVED_FROM
);
87 __u32 new_dir_mask
= (FS_EVENT_ON_CHILD
| FS_MOVED_TO
);
88 const unsigned char *new_name
= moved
->d_name
.name
;
90 if (old_dir
== new_dir
)
91 old_dir_mask
|= FS_DN_RENAME
;
94 old_dir_mask
|= FS_IN_ISDIR
;
95 new_dir_mask
|= FS_IN_ISDIR
;
98 fsnotify(old_dir
, old_dir_mask
, old_dir
, FSNOTIFY_EVENT_INODE
, old_name
, fs_cookie
);
99 fsnotify(new_dir
, new_dir_mask
, new_dir
, FSNOTIFY_EVENT_INODE
, new_name
, fs_cookie
);
102 fsnotify_link_count(target
);
105 fsnotify(source
, FS_MOVE_SELF
, moved
->d_inode
, FSNOTIFY_EVENT_INODE
, NULL
, 0);
106 audit_inode_child(moved
, new_dir
);
110 * fsnotify_inode_delete - and inode is being evicted from cache, clean up is needed
112 static inline void fsnotify_inode_delete(struct inode
*inode
)
114 __fsnotify_inode_delete(inode
);
118 * fsnotify_vfsmount_delete - a vfsmount is being destroyed, clean up is needed
120 static inline void fsnotify_vfsmount_delete(struct vfsmount
*mnt
)
122 __fsnotify_vfsmount_delete(mnt
);
126 * fsnotify_nameremove - a filename was removed from a directory
128 static inline void fsnotify_nameremove(struct dentry
*dentry
, int isdir
)
130 __u32 mask
= FS_DELETE
;
135 fsnotify_parent(NULL
, dentry
, mask
);
139 * fsnotify_inoderemove - an inode is going away
141 static inline void fsnotify_inoderemove(struct inode
*inode
)
143 fsnotify(inode
, FS_DELETE_SELF
, inode
, FSNOTIFY_EVENT_INODE
, NULL
, 0);
144 __fsnotify_inode_delete(inode
);
148 * fsnotify_create - 'name' was linked in
150 static inline void fsnotify_create(struct inode
*inode
, struct dentry
*dentry
)
152 audit_inode_child(dentry
, inode
);
154 fsnotify(inode
, FS_CREATE
, dentry
->d_inode
, FSNOTIFY_EVENT_INODE
, dentry
->d_name
.name
, 0);
158 * fsnotify_link - new hardlink in 'inode' directory
159 * Note: We have to pass also the linked inode ptr as some filesystems leave
160 * new_dentry->d_inode NULL and instantiate inode pointer later
162 static inline void fsnotify_link(struct inode
*dir
, struct inode
*inode
, struct dentry
*new_dentry
)
164 fsnotify_link_count(inode
);
165 audit_inode_child(new_dentry
, dir
);
167 fsnotify(dir
, FS_CREATE
, inode
, FSNOTIFY_EVENT_INODE
, new_dentry
->d_name
.name
, 0);
171 * fsnotify_mkdir - directory 'name' was created
173 static inline void fsnotify_mkdir(struct inode
*inode
, struct dentry
*dentry
)
175 __u32 mask
= (FS_CREATE
| FS_IN_ISDIR
);
176 struct inode
*d_inode
= dentry
->d_inode
;
178 audit_inode_child(dentry
, inode
);
180 fsnotify(inode
, mask
, d_inode
, FSNOTIFY_EVENT_INODE
, dentry
->d_name
.name
, 0);
184 * fsnotify_access - file was read
186 static inline void fsnotify_access(struct file
*file
)
188 struct path
*path
= &file
->f_path
;
189 struct inode
*inode
= path
->dentry
->d_inode
;
190 __u32 mask
= FS_ACCESS
;
192 if (S_ISDIR(inode
->i_mode
))
195 if (!(file
->f_mode
& FMODE_NONOTIFY
)) {
196 fsnotify_parent(path
, NULL
, mask
);
197 fsnotify(inode
, mask
, path
, FSNOTIFY_EVENT_PATH
, NULL
, 0);
202 * fsnotify_modify - file was modified
204 static inline void fsnotify_modify(struct file
*file
)
206 struct path
*path
= &file
->f_path
;
207 struct inode
*inode
= path
->dentry
->d_inode
;
208 __u32 mask
= FS_MODIFY
;
210 if (S_ISDIR(inode
->i_mode
))
213 if (!(file
->f_mode
& FMODE_NONOTIFY
)) {
214 fsnotify_parent(path
, NULL
, mask
);
215 fsnotify(inode
, mask
, path
, FSNOTIFY_EVENT_PATH
, NULL
, 0);
220 * fsnotify_open - file was opened
222 static inline void fsnotify_open(struct file
*file
)
224 struct path
*path
= &file
->f_path
;
225 struct inode
*inode
= path
->dentry
->d_inode
;
226 __u32 mask
= FS_OPEN
;
228 if (S_ISDIR(inode
->i_mode
))
231 if (!(file
->f_mode
& FMODE_NONOTIFY
)) {
232 fsnotify_parent(path
, NULL
, mask
);
233 fsnotify(inode
, mask
, path
, FSNOTIFY_EVENT_PATH
, NULL
, 0);
238 * fsnotify_close - file was closed
240 static inline void fsnotify_close(struct file
*file
)
242 struct path
*path
= &file
->f_path
;
243 struct inode
*inode
= file
->f_path
.dentry
->d_inode
;
244 fmode_t mode
= file
->f_mode
;
245 __u32 mask
= (mode
& FMODE_WRITE
) ? FS_CLOSE_WRITE
: FS_CLOSE_NOWRITE
;
247 if (S_ISDIR(inode
->i_mode
))
250 if (!(file
->f_mode
& FMODE_NONOTIFY
)) {
251 fsnotify_parent(path
, NULL
, mask
);
252 fsnotify(inode
, mask
, path
, FSNOTIFY_EVENT_PATH
, NULL
, 0);
257 * fsnotify_xattr - extended attributes were changed
259 static inline void fsnotify_xattr(struct dentry
*dentry
)
261 struct inode
*inode
= dentry
->d_inode
;
262 __u32 mask
= FS_ATTRIB
;
264 if (S_ISDIR(inode
->i_mode
))
267 fsnotify_parent(NULL
, dentry
, mask
);
268 fsnotify(inode
, mask
, inode
, FSNOTIFY_EVENT_INODE
, NULL
, 0);
272 * fsnotify_change - notify_change event. file was modified and/or metadata
275 static inline void fsnotify_change(struct dentry
*dentry
, unsigned int ia_valid
)
277 struct inode
*inode
= dentry
->d_inode
;
280 if (ia_valid
& ATTR_UID
)
282 if (ia_valid
& ATTR_GID
)
284 if (ia_valid
& ATTR_SIZE
)
287 /* both times implies a utime(s) call */
288 if ((ia_valid
& (ATTR_ATIME
| ATTR_MTIME
)) == (ATTR_ATIME
| ATTR_MTIME
))
290 else if (ia_valid
& ATTR_ATIME
)
292 else if (ia_valid
& ATTR_MTIME
)
295 if (ia_valid
& ATTR_MODE
)
299 if (S_ISDIR(inode
->i_mode
))
302 fsnotify_parent(NULL
, dentry
, mask
);
303 fsnotify(inode
, mask
, inode
, FSNOTIFY_EVENT_INODE
, NULL
, 0);
307 #if defined(CONFIG_FSNOTIFY) /* notify helpers */
310 * fsnotify_oldname_init - save off the old filename before we change it
312 static inline const unsigned char *fsnotify_oldname_init(const unsigned char *name
)
314 return kstrdup(name
, GFP_KERNEL
);
318 * fsnotify_oldname_free - free the name we got from fsnotify_oldname_init
320 static inline void fsnotify_oldname_free(const unsigned char *old_name
)
325 #else /* CONFIG_FSNOTIFY */
327 static inline const char *fsnotify_oldname_init(const unsigned char *name
)
332 static inline void fsnotify_oldname_free(const unsigned char *old_name
)
336 #endif /* CONFIG_FSNOTIFY */
338 #endif /* _LINUX_FS_NOTIFY_H */