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
16 #include <linux/dnotify.h>
17 #include <linux/inotify.h>
18 #include <linux/audit.h>
21 * fsnotify_d_instantiate - instantiate a dentry for inode
22 * Called with dcache_lock held.
24 static inline void fsnotify_d_instantiate(struct dentry *entry,
27 inotify_d_instantiate(entry, inode);
31 * fsnotify_d_move - entry has been moved
32 * Called with dcache_lock and entry->d_lock held.
34 static inline void fsnotify_d_move(struct dentry *entry)
36 inotify_d_move(entry);
40 * fsnotify_move - file old_name at old_dir was moved to new_name at new_dir
42 static inline void fsnotify_move(struct inode *old_dir, struct inode *new_dir,
43 const char *old_name, const char *new_name,
44 int isdir, struct inode *target, struct dentry *moved)
46 struct inode *source = moved->d_inode;
47 u32 cookie = inotify_get_cookie();
49 if (old_dir == new_dir)
50 inode_dir_notify(old_dir, DN_RENAME);
52 inode_dir_notify(old_dir, DN_DELETE);
53 inode_dir_notify(new_dir, DN_CREATE);
58 inotify_inode_queue_event(old_dir, IN_MOVED_FROM|isdir,cookie,old_name,
60 inotify_inode_queue_event(new_dir, IN_MOVED_TO|isdir, cookie, new_name,
64 inotify_inode_queue_event(target, IN_DELETE_SELF, 0, NULL, NULL);
65 inotify_inode_is_dead(target);
69 inotify_inode_queue_event(source, IN_MOVE_SELF, 0, NULL, NULL);
71 audit_inode_child(new_name, moved, new_dir);
75 * fsnotify_nameremove - a filename was removed from a directory
77 static inline void fsnotify_nameremove(struct dentry *dentry, int isdir)
81 dnotify_parent(dentry, DN_DELETE);
82 inotify_dentry_parent_queue_event(dentry, IN_DELETE|isdir, 0, dentry->d_name.name);
86 * fsnotify_inoderemove - an inode is going away
88 static inline void fsnotify_inoderemove(struct inode *inode)
90 inotify_inode_queue_event(inode, IN_DELETE_SELF, 0, NULL, NULL);
91 inotify_inode_is_dead(inode);
95 * fsnotify_create - 'name' was linked in
97 static inline void fsnotify_create(struct inode *inode, struct dentry *dentry)
99 inode_dir_notify(inode, DN_CREATE);
100 inotify_inode_queue_event(inode, IN_CREATE, 0, dentry->d_name.name,
102 audit_inode_child(dentry->d_name.name, dentry, inode);
106 * fsnotify_mkdir - directory 'name' was created
108 static inline void fsnotify_mkdir(struct inode *inode, struct dentry *dentry)
110 inode_dir_notify(inode, DN_CREATE);
111 inotify_inode_queue_event(inode, IN_CREATE | IN_ISDIR, 0,
112 dentry->d_name.name, dentry->d_inode);
113 audit_inode_child(dentry->d_name.name, dentry, inode);
117 * fsnotify_access - file was read
119 static inline void fsnotify_access(struct dentry *dentry)
121 struct inode *inode = dentry->d_inode;
122 u32 mask = IN_ACCESS;
124 if (S_ISDIR(inode->i_mode))
127 dnotify_parent(dentry, DN_ACCESS);
128 inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name);
129 inotify_inode_queue_event(inode, mask, 0, NULL, NULL);
133 * fsnotify_modify - file was modified
135 static inline void fsnotify_modify(struct dentry *dentry)
137 struct inode *inode = dentry->d_inode;
138 u32 mask = IN_MODIFY;
140 if (S_ISDIR(inode->i_mode))
143 dnotify_parent(dentry, DN_MODIFY);
144 inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name);
145 inotify_inode_queue_event(inode, mask, 0, NULL, NULL);
149 * fsnotify_open - file was opened
151 static inline void fsnotify_open(struct dentry *dentry)
153 struct inode *inode = dentry->d_inode;
156 if (S_ISDIR(inode->i_mode))
159 inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name);
160 inotify_inode_queue_event(inode, mask, 0, NULL, NULL);
164 * fsnotify_close - file was closed
166 static inline void fsnotify_close(struct file *file)
168 struct dentry *dentry = file->f_path.dentry;
169 struct inode *inode = dentry->d_inode;
170 const char *name = dentry->d_name.name;
171 mode_t mode = file->f_mode;
172 u32 mask = (mode & FMODE_WRITE) ? IN_CLOSE_WRITE : IN_CLOSE_NOWRITE;
174 if (S_ISDIR(inode->i_mode))
177 inotify_dentry_parent_queue_event(dentry, mask, 0, name);
178 inotify_inode_queue_event(inode, mask, 0, NULL, NULL);
182 * fsnotify_xattr - extended attributes were changed
184 static inline void fsnotify_xattr(struct dentry *dentry)
186 struct inode *inode = dentry->d_inode;
187 u32 mask = IN_ATTRIB;
189 if (S_ISDIR(inode->i_mode))
192 inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name);
193 inotify_inode_queue_event(inode, mask, 0, NULL, NULL);
197 * fsnotify_change - notify_change event. file was modified and/or metadata
200 static inline void fsnotify_change(struct dentry *dentry, unsigned int ia_valid)
202 struct inode *inode = dentry->d_inode;
206 if (ia_valid & ATTR_UID) {
207 in_mask |= IN_ATTRIB;
208 dn_mask |= DN_ATTRIB;
210 if (ia_valid & ATTR_GID) {
211 in_mask |= IN_ATTRIB;
212 dn_mask |= DN_ATTRIB;
214 if (ia_valid & ATTR_SIZE) {
215 in_mask |= IN_MODIFY;
216 dn_mask |= DN_MODIFY;
218 /* both times implies a utime(s) call */
219 if ((ia_valid & (ATTR_ATIME | ATTR_MTIME)) == (ATTR_ATIME | ATTR_MTIME))
221 in_mask |= IN_ATTRIB;
222 dn_mask |= DN_ATTRIB;
223 } else if (ia_valid & ATTR_ATIME) {
224 in_mask |= IN_ACCESS;
225 dn_mask |= DN_ACCESS;
226 } else if (ia_valid & ATTR_MTIME) {
227 in_mask |= IN_MODIFY;
228 dn_mask |= DN_MODIFY;
230 if (ia_valid & ATTR_MODE) {
231 in_mask |= IN_ATTRIB;
232 dn_mask |= DN_ATTRIB;
236 dnotify_parent(dentry, dn_mask);
238 if (S_ISDIR(inode->i_mode))
240 inotify_inode_queue_event(inode, in_mask, 0, NULL, NULL);
241 inotify_dentry_parent_queue_event(dentry, in_mask, 0,
242 dentry->d_name.name);
246 #ifdef CONFIG_INOTIFY /* inotify helpers */
249 * fsnotify_oldname_init - save off the old filename before we change it
251 static inline const char *fsnotify_oldname_init(const char *name)
253 return kstrdup(name, GFP_KERNEL);
257 * fsnotify_oldname_free - free the name we got from fsnotify_oldname_init
259 static inline void fsnotify_oldname_free(const char *old_name)
264 #else /* CONFIG_INOTIFY */
266 static inline const char *fsnotify_oldname_init(const char *name)
271 static inline void fsnotify_oldname_free(const char *old_name)
275 #endif /* ! CONFIG_INOTIFY */
277 #endif /* __KERNEL__ */
279 #endif /* _LINUX_FS_NOTIFY_H */