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git.proxmox.com Git - mirror_ubuntu-zesty-kernel.git/blob - include/linux/fsnotify.h
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/dnotify.h>
15 #include <linux/inotify.h>
16 #include <linux/audit.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
*entry
,
25 inotify_d_instantiate(entry
, inode
);
29 * fsnotify_d_move - entry has been moved
30 * Called with dcache_lock and entry->d_lock held.
32 static inline void fsnotify_d_move(struct dentry
*entry
)
34 inotify_d_move(entry
);
38 * fsnotify_move - file old_name at old_dir was moved to new_name at new_dir
40 static inline void fsnotify_move(struct inode
*old_dir
, struct inode
*new_dir
,
41 const char *old_name
, const char *new_name
,
42 int isdir
, struct inode
*target
, struct dentry
*moved
)
44 struct inode
*source
= moved
->d_inode
;
45 u32 cookie
= inotify_get_cookie();
47 if (old_dir
== new_dir
)
48 inode_dir_notify(old_dir
, DN_RENAME
);
50 inode_dir_notify(old_dir
, DN_DELETE
);
51 inode_dir_notify(new_dir
, DN_CREATE
);
56 inotify_inode_queue_event(old_dir
, IN_MOVED_FROM
|isdir
,cookie
,old_name
,
58 inotify_inode_queue_event(new_dir
, IN_MOVED_TO
|isdir
, cookie
, new_name
,
62 inotify_inode_queue_event(target
, IN_DELETE_SELF
, 0, NULL
, NULL
);
63 inotify_inode_is_dead(target
);
67 inotify_inode_queue_event(source
, IN_MOVE_SELF
, 0, NULL
, NULL
);
69 audit_inode_child(new_name
, moved
, new_dir
);
73 * fsnotify_nameremove - a filename was removed from a directory
75 static inline void fsnotify_nameremove(struct dentry
*dentry
, int isdir
)
79 dnotify_parent(dentry
, DN_DELETE
);
80 inotify_dentry_parent_queue_event(dentry
, IN_DELETE
|isdir
, 0, dentry
->d_name
.name
);
84 * fsnotify_inoderemove - an inode is going away
86 static inline void fsnotify_inoderemove(struct inode
*inode
)
88 inotify_inode_queue_event(inode
, IN_DELETE_SELF
, 0, NULL
, NULL
);
89 inotify_inode_is_dead(inode
);
93 * fsnotify_link_count - inode's link count changed
95 static inline void fsnotify_link_count(struct inode
*inode
)
97 inotify_inode_queue_event(inode
, IN_ATTRIB
, 0, NULL
, NULL
);
101 * fsnotify_create - 'name' was linked in
103 static inline void fsnotify_create(struct inode
*inode
, struct dentry
*dentry
)
105 inode_dir_notify(inode
, DN_CREATE
);
106 inotify_inode_queue_event(inode
, IN_CREATE
, 0, dentry
->d_name
.name
,
108 audit_inode_child(dentry
->d_name
.name
, dentry
, inode
);
112 * fsnotify_link - new hardlink in 'inode' directory
113 * Note: We have to pass also the linked inode ptr as some filesystems leave
114 * new_dentry->d_inode NULL and instantiate inode pointer later
116 static inline void fsnotify_link(struct inode
*dir
, struct inode
*inode
, struct dentry
*new_dentry
)
118 inode_dir_notify(dir
, DN_CREATE
);
119 inotify_inode_queue_event(dir
, IN_CREATE
, 0, new_dentry
->d_name
.name
,
121 fsnotify_link_count(inode
);
122 audit_inode_child(new_dentry
->d_name
.name
, new_dentry
, dir
);
126 * fsnotify_mkdir - directory 'name' was created
128 static inline void fsnotify_mkdir(struct inode
*inode
, struct dentry
*dentry
)
130 inode_dir_notify(inode
, DN_CREATE
);
131 inotify_inode_queue_event(inode
, IN_CREATE
| IN_ISDIR
, 0,
132 dentry
->d_name
.name
, dentry
->d_inode
);
133 audit_inode_child(dentry
->d_name
.name
, dentry
, inode
);
137 * fsnotify_access - file was read
139 static inline void fsnotify_access(struct dentry
*dentry
)
141 struct inode
*inode
= dentry
->d_inode
;
142 u32 mask
= IN_ACCESS
;
144 if (S_ISDIR(inode
->i_mode
))
147 dnotify_parent(dentry
, DN_ACCESS
);
148 inotify_dentry_parent_queue_event(dentry
, mask
, 0, dentry
->d_name
.name
);
149 inotify_inode_queue_event(inode
, mask
, 0, NULL
, NULL
);
153 * fsnotify_modify - file was modified
155 static inline void fsnotify_modify(struct dentry
*dentry
)
157 struct inode
*inode
= dentry
->d_inode
;
158 u32 mask
= IN_MODIFY
;
160 if (S_ISDIR(inode
->i_mode
))
163 dnotify_parent(dentry
, DN_MODIFY
);
164 inotify_dentry_parent_queue_event(dentry
, mask
, 0, dentry
->d_name
.name
);
165 inotify_inode_queue_event(inode
, mask
, 0, NULL
, NULL
);
169 * fsnotify_open - file was opened
171 static inline void fsnotify_open(struct dentry
*dentry
)
173 struct inode
*inode
= dentry
->d_inode
;
176 if (S_ISDIR(inode
->i_mode
))
179 inotify_dentry_parent_queue_event(dentry
, mask
, 0, dentry
->d_name
.name
);
180 inotify_inode_queue_event(inode
, mask
, 0, NULL
, NULL
);
184 * fsnotify_close - file was closed
186 static inline void fsnotify_close(struct file
*file
)
188 struct dentry
*dentry
= file
->f_path
.dentry
;
189 struct inode
*inode
= dentry
->d_inode
;
190 const char *name
= dentry
->d_name
.name
;
191 fmode_t mode
= file
->f_mode
;
192 u32 mask
= (mode
& FMODE_WRITE
) ? IN_CLOSE_WRITE
: IN_CLOSE_NOWRITE
;
194 if (S_ISDIR(inode
->i_mode
))
197 inotify_dentry_parent_queue_event(dentry
, mask
, 0, name
);
198 inotify_inode_queue_event(inode
, mask
, 0, NULL
, NULL
);
202 * fsnotify_xattr - extended attributes were changed
204 static inline void fsnotify_xattr(struct dentry
*dentry
)
206 struct inode
*inode
= dentry
->d_inode
;
207 u32 mask
= IN_ATTRIB
;
209 if (S_ISDIR(inode
->i_mode
))
212 inotify_dentry_parent_queue_event(dentry
, mask
, 0, dentry
->d_name
.name
);
213 inotify_inode_queue_event(inode
, mask
, 0, NULL
, NULL
);
217 * fsnotify_change - notify_change event. file was modified and/or metadata
220 static inline void fsnotify_change(struct dentry
*dentry
, unsigned int ia_valid
)
222 struct inode
*inode
= dentry
->d_inode
;
226 if (ia_valid
& ATTR_UID
) {
227 in_mask
|= IN_ATTRIB
;
228 dn_mask
|= DN_ATTRIB
;
230 if (ia_valid
& ATTR_GID
) {
231 in_mask
|= IN_ATTRIB
;
232 dn_mask
|= DN_ATTRIB
;
234 if (ia_valid
& ATTR_SIZE
) {
235 in_mask
|= IN_MODIFY
;
236 dn_mask
|= DN_MODIFY
;
238 /* both times implies a utime(s) call */
239 if ((ia_valid
& (ATTR_ATIME
| ATTR_MTIME
)) == (ATTR_ATIME
| ATTR_MTIME
))
241 in_mask
|= IN_ATTRIB
;
242 dn_mask
|= DN_ATTRIB
;
243 } else if (ia_valid
& ATTR_ATIME
) {
244 in_mask
|= IN_ACCESS
;
245 dn_mask
|= DN_ACCESS
;
246 } else if (ia_valid
& ATTR_MTIME
) {
247 in_mask
|= IN_MODIFY
;
248 dn_mask
|= DN_MODIFY
;
250 if (ia_valid
& ATTR_MODE
) {
251 in_mask
|= IN_ATTRIB
;
252 dn_mask
|= DN_ATTRIB
;
256 dnotify_parent(dentry
, dn_mask
);
258 if (S_ISDIR(inode
->i_mode
))
260 inotify_inode_queue_event(inode
, in_mask
, 0, NULL
, NULL
);
261 inotify_dentry_parent_queue_event(dentry
, in_mask
, 0,
262 dentry
->d_name
.name
);
266 #ifdef CONFIG_INOTIFY /* inotify helpers */
269 * fsnotify_oldname_init - save off the old filename before we change it
271 static inline const char *fsnotify_oldname_init(const char *name
)
273 return kstrdup(name
, GFP_KERNEL
);
277 * fsnotify_oldname_free - free the name we got from fsnotify_oldname_init
279 static inline void fsnotify_oldname_free(const char *old_name
)
284 #else /* CONFIG_INOTIFY */
286 static inline const char *fsnotify_oldname_init(const char *name
)
291 static inline void fsnotify_oldname_free(const char *old_name
)
295 #endif /* ! CONFIG_INOTIFY */
297 #endif /* _LINUX_FS_NOTIFY_H */