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
21 static inline void fsnotify_d_instantiate(struct dentry
*dentry
,
24 __fsnotify_d_instantiate(dentry
, inode
);
27 /* Notify this dentry's parent about a child's events. */
28 static inline int fsnotify_parent(struct path
*path
, struct dentry
*dentry
, __u32 mask
)
31 dentry
= path
->dentry
;
33 return __fsnotify_parent(path
, dentry
, mask
);
36 /* simple call site for access decisions */
37 static inline int fsnotify_perm(struct file
*file
, int mask
)
39 struct path
*path
= &file
->f_path
;
40 struct inode
*inode
= path
->dentry
->d_inode
;
41 __u32 fsnotify_mask
= 0;
44 if (file
->f_mode
& FMODE_NONOTIFY
)
46 if (!(mask
& (MAY_READ
| MAY_OPEN
)))
49 fsnotify_mask
= FS_OPEN_PERM
;
50 else if (mask
& MAY_READ
)
51 fsnotify_mask
= FS_ACCESS_PERM
;
55 ret
= fsnotify_parent(path
, NULL
, fsnotify_mask
);
59 return fsnotify(inode
, fsnotify_mask
, path
, FSNOTIFY_EVENT_PATH
, NULL
, 0);
63 * fsnotify_d_move - dentry has been moved
65 static inline void fsnotify_d_move(struct dentry
*dentry
)
68 * On move we need to update dentry->d_flags to indicate if the new parent
69 * cares about events from this dentry.
71 __fsnotify_update_dcache_flags(dentry
);
75 * fsnotify_link_count - inode's link count changed
77 static inline void fsnotify_link_count(struct inode
*inode
)
79 fsnotify(inode
, FS_ATTRIB
, inode
, FSNOTIFY_EVENT_INODE
, NULL
, 0);
83 * fsnotify_move - file old_name at old_dir was moved to new_name at new_dir
85 static inline void fsnotify_move(struct inode
*old_dir
, struct inode
*new_dir
,
86 const unsigned char *old_name
,
87 int isdir
, struct inode
*target
, struct dentry
*moved
)
89 struct inode
*source
= moved
->d_inode
;
90 u32 fs_cookie
= fsnotify_get_cookie();
91 __u32 old_dir_mask
= (FS_EVENT_ON_CHILD
| FS_MOVED_FROM
);
92 __u32 new_dir_mask
= (FS_EVENT_ON_CHILD
| FS_MOVED_TO
);
93 const unsigned char *new_name
= moved
->d_name
.name
;
95 if (old_dir
== new_dir
)
96 old_dir_mask
|= FS_DN_RENAME
;
99 old_dir_mask
|= FS_ISDIR
;
100 new_dir_mask
|= FS_ISDIR
;
103 fsnotify(old_dir
, old_dir_mask
, old_dir
, FSNOTIFY_EVENT_INODE
, old_name
, fs_cookie
);
104 fsnotify(new_dir
, new_dir_mask
, new_dir
, FSNOTIFY_EVENT_INODE
, new_name
, fs_cookie
);
107 fsnotify_link_count(target
);
110 fsnotify(source
, FS_MOVE_SELF
, moved
->d_inode
, FSNOTIFY_EVENT_INODE
, NULL
, 0);
111 audit_inode_child(moved
, new_dir
);
115 * fsnotify_inode_delete - and inode is being evicted from cache, clean up is needed
117 static inline void fsnotify_inode_delete(struct inode
*inode
)
119 __fsnotify_inode_delete(inode
);
123 * fsnotify_vfsmount_delete - a vfsmount is being destroyed, clean up is needed
125 static inline void fsnotify_vfsmount_delete(struct vfsmount
*mnt
)
127 __fsnotify_vfsmount_delete(mnt
);
131 * fsnotify_nameremove - a filename was removed from a directory
133 static inline void fsnotify_nameremove(struct dentry
*dentry
, int isdir
)
135 __u32 mask
= FS_DELETE
;
140 fsnotify_parent(NULL
, dentry
, mask
);
144 * fsnotify_inoderemove - an inode is going away
146 static inline void fsnotify_inoderemove(struct inode
*inode
)
148 fsnotify(inode
, FS_DELETE_SELF
, inode
, FSNOTIFY_EVENT_INODE
, NULL
, 0);
149 __fsnotify_inode_delete(inode
);
153 * fsnotify_create - 'name' was linked in
155 static inline void fsnotify_create(struct inode
*inode
, struct dentry
*dentry
)
157 audit_inode_child(dentry
, inode
);
159 fsnotify(inode
, FS_CREATE
, dentry
->d_inode
, FSNOTIFY_EVENT_INODE
, dentry
->d_name
.name
, 0);
163 * fsnotify_link - new hardlink in 'inode' directory
164 * Note: We have to pass also the linked inode ptr as some filesystems leave
165 * new_dentry->d_inode NULL and instantiate inode pointer later
167 static inline void fsnotify_link(struct inode
*dir
, struct inode
*inode
, struct dentry
*new_dentry
)
169 fsnotify_link_count(inode
);
170 audit_inode_child(new_dentry
, dir
);
172 fsnotify(dir
, FS_CREATE
, inode
, FSNOTIFY_EVENT_INODE
, new_dentry
->d_name
.name
, 0);
176 * fsnotify_mkdir - directory 'name' was created
178 static inline void fsnotify_mkdir(struct inode
*inode
, struct dentry
*dentry
)
180 __u32 mask
= (FS_CREATE
| FS_ISDIR
);
181 struct inode
*d_inode
= dentry
->d_inode
;
183 audit_inode_child(dentry
, inode
);
185 fsnotify(inode
, mask
, d_inode
, FSNOTIFY_EVENT_INODE
, dentry
->d_name
.name
, 0);
189 * fsnotify_access - file was read
191 static inline void fsnotify_access(struct file
*file
)
193 struct path
*path
= &file
->f_path
;
194 struct inode
*inode
= path
->dentry
->d_inode
;
195 __u32 mask
= FS_ACCESS
;
197 if (S_ISDIR(inode
->i_mode
))
200 if (!(file
->f_mode
& FMODE_NONOTIFY
)) {
201 fsnotify_parent(path
, NULL
, mask
);
202 fsnotify(inode
, mask
, path
, FSNOTIFY_EVENT_PATH
, NULL
, 0);
207 * fsnotify_modify - file was modified
209 static inline void fsnotify_modify(struct file
*file
)
211 struct path
*path
= &file
->f_path
;
212 struct inode
*inode
= path
->dentry
->d_inode
;
213 __u32 mask
= FS_MODIFY
;
215 if (S_ISDIR(inode
->i_mode
))
218 if (!(file
->f_mode
& FMODE_NONOTIFY
)) {
219 fsnotify_parent(path
, NULL
, mask
);
220 fsnotify(inode
, mask
, path
, FSNOTIFY_EVENT_PATH
, NULL
, 0);
225 * fsnotify_open - file was opened
227 static inline void fsnotify_open(struct file
*file
)
229 struct path
*path
= &file
->f_path
;
230 struct inode
*inode
= path
->dentry
->d_inode
;
231 __u32 mask
= FS_OPEN
;
233 if (S_ISDIR(inode
->i_mode
))
236 fsnotify_parent(path
, NULL
, mask
);
237 fsnotify(inode
, mask
, path
, FSNOTIFY_EVENT_PATH
, NULL
, 0);
241 * fsnotify_close - file was closed
243 static inline void fsnotify_close(struct file
*file
)
245 struct path
*path
= &file
->f_path
;
246 struct inode
*inode
= file
->f_path
.dentry
->d_inode
;
247 fmode_t mode
= file
->f_mode
;
248 __u32 mask
= (mode
& FMODE_WRITE
) ? FS_CLOSE_WRITE
: FS_CLOSE_NOWRITE
;
250 if (S_ISDIR(inode
->i_mode
))
253 if (!(file
->f_mode
& FMODE_NONOTIFY
)) {
254 fsnotify_parent(path
, NULL
, mask
);
255 fsnotify(inode
, mask
, path
, FSNOTIFY_EVENT_PATH
, NULL
, 0);
260 * fsnotify_xattr - extended attributes were changed
262 static inline void fsnotify_xattr(struct dentry
*dentry
)
264 struct inode
*inode
= dentry
->d_inode
;
265 __u32 mask
= FS_ATTRIB
;
267 if (S_ISDIR(inode
->i_mode
))
270 fsnotify_parent(NULL
, dentry
, mask
);
271 fsnotify(inode
, mask
, inode
, FSNOTIFY_EVENT_INODE
, NULL
, 0);
275 * fsnotify_change - notify_change event. file was modified and/or metadata
278 static inline void fsnotify_change(struct dentry
*dentry
, unsigned int ia_valid
)
280 struct inode
*inode
= dentry
->d_inode
;
283 if (ia_valid
& ATTR_UID
)
285 if (ia_valid
& ATTR_GID
)
287 if (ia_valid
& ATTR_SIZE
)
290 /* both times implies a utime(s) call */
291 if ((ia_valid
& (ATTR_ATIME
| ATTR_MTIME
)) == (ATTR_ATIME
| ATTR_MTIME
))
293 else if (ia_valid
& ATTR_ATIME
)
295 else if (ia_valid
& ATTR_MTIME
)
298 if (ia_valid
& ATTR_MODE
)
302 if (S_ISDIR(inode
->i_mode
))
305 fsnotify_parent(NULL
, dentry
, mask
);
306 fsnotify(inode
, mask
, inode
, FSNOTIFY_EVENT_INODE
, NULL
, 0);
310 #if defined(CONFIG_FSNOTIFY) /* notify helpers */
313 * fsnotify_oldname_init - save off the old filename before we change it
315 static inline const unsigned char *fsnotify_oldname_init(const unsigned char *name
)
317 return kstrdup(name
, GFP_KERNEL
);
321 * fsnotify_oldname_free - free the name we got from fsnotify_oldname_init
323 static inline void fsnotify_oldname_free(const unsigned char *old_name
)
328 #else /* CONFIG_FSNOTIFY */
330 static inline const char *fsnotify_oldname_init(const unsigned char *name
)
335 static inline void fsnotify_oldname_free(const unsigned char *old_name
)
339 #endif /* CONFIG_FSNOTIFY */
341 #endif /* _LINUX_FS_NOTIFY_H */
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