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_link_count - inode's link count changed
97 static inline void fsnotify_link_count(struct inode *inode)
99 inotify_inode_queue_event(inode, IN_ATTRIB, 0, NULL, NULL);
103 * fsnotify_create - 'name' was linked in
105 static inline void fsnotify_create(struct inode *inode, struct dentry *dentry)
107 inode_dir_notify(inode, DN_CREATE);
108 inotify_inode_queue_event(inode, IN_CREATE, 0, dentry->d_name.name,
110 audit_inode_child(dentry->d_name.name, dentry, inode);
114 * fsnotify_link - new hardlink in 'inode' directory
115 * Note: We have to pass also the linked inode ptr as some filesystems leave
116 * new_dentry->d_inode NULL and instantiate inode pointer later
118 static inline void fsnotify_link(struct inode *dir, struct inode *inode, struct dentry *new_dentry)
120 inode_dir_notify(dir, DN_CREATE);
121 inotify_inode_queue_event(dir, IN_CREATE, 0, new_dentry->d_name.name,
123 fsnotify_link_count(inode);
124 audit_inode_child(new_dentry->d_name.name, new_dentry, dir);
128 * fsnotify_mkdir - directory 'name' was created
130 static inline void fsnotify_mkdir(struct inode *inode, struct dentry *dentry)
132 inode_dir_notify(inode, DN_CREATE);
133 inotify_inode_queue_event(inode, IN_CREATE | IN_ISDIR, 0,
134 dentry->d_name.name, dentry->d_inode);
135 audit_inode_child(dentry->d_name.name, dentry, inode);
139 * fsnotify_access - file was read
141 static inline void fsnotify_access(struct dentry *dentry)
143 struct inode *inode = dentry->d_inode;
144 u32 mask = IN_ACCESS;
146 if (S_ISDIR(inode->i_mode))
149 dnotify_parent(dentry, DN_ACCESS);
150 inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name);
151 inotify_inode_queue_event(inode, mask, 0, NULL, NULL);
155 * fsnotify_modify - file was modified
157 static inline void fsnotify_modify(struct dentry *dentry)
159 struct inode *inode = dentry->d_inode;
160 u32 mask = IN_MODIFY;
162 if (S_ISDIR(inode->i_mode))
165 dnotify_parent(dentry, DN_MODIFY);
166 inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name);
167 inotify_inode_queue_event(inode, mask, 0, NULL, NULL);
171 * fsnotify_open - file was opened
173 static inline void fsnotify_open(struct dentry *dentry)
175 struct inode *inode = dentry->d_inode;
178 if (S_ISDIR(inode->i_mode))
181 inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name);
182 inotify_inode_queue_event(inode, mask, 0, NULL, NULL);
186 * fsnotify_close - file was closed
188 static inline void fsnotify_close(struct file *file)
190 struct dentry *dentry = file->f_path.dentry;
191 struct inode *inode = dentry->d_inode;
192 const char *name = dentry->d_name.name;
193 mode_t mode = file->f_mode;
194 u32 mask = (mode & FMODE_WRITE) ? IN_CLOSE_WRITE : IN_CLOSE_NOWRITE;
196 if (S_ISDIR(inode->i_mode))
199 inotify_dentry_parent_queue_event(dentry, mask, 0, name);
200 inotify_inode_queue_event(inode, mask, 0, NULL, NULL);
204 * fsnotify_xattr - extended attributes were changed
206 static inline void fsnotify_xattr(struct dentry *dentry)
208 struct inode *inode = dentry->d_inode;
209 u32 mask = IN_ATTRIB;
211 if (S_ISDIR(inode->i_mode))
214 inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name);
215 inotify_inode_queue_event(inode, mask, 0, NULL, NULL);
219 * fsnotify_change - notify_change event. file was modified and/or metadata
222 static inline void fsnotify_change(struct dentry *dentry, unsigned int ia_valid)
224 struct inode *inode = dentry->d_inode;
228 if (ia_valid & ATTR_UID) {
229 in_mask |= IN_ATTRIB;
230 dn_mask |= DN_ATTRIB;
232 if (ia_valid & ATTR_GID) {
233 in_mask |= IN_ATTRIB;
234 dn_mask |= DN_ATTRIB;
236 if (ia_valid & ATTR_SIZE) {
237 in_mask |= IN_MODIFY;
238 dn_mask |= DN_MODIFY;
240 /* both times implies a utime(s) call */
241 if ((ia_valid & (ATTR_ATIME | ATTR_MTIME)) == (ATTR_ATIME | ATTR_MTIME))
243 in_mask |= IN_ATTRIB;
244 dn_mask |= DN_ATTRIB;
245 } else if (ia_valid & ATTR_ATIME) {
246 in_mask |= IN_ACCESS;
247 dn_mask |= DN_ACCESS;
248 } else if (ia_valid & ATTR_MTIME) {
249 in_mask |= IN_MODIFY;
250 dn_mask |= DN_MODIFY;
252 if (ia_valid & ATTR_MODE) {
253 in_mask |= IN_ATTRIB;
254 dn_mask |= DN_ATTRIB;
258 dnotify_parent(dentry, dn_mask);
260 if (S_ISDIR(inode->i_mode))
262 inotify_inode_queue_event(inode, in_mask, 0, NULL, NULL);
263 inotify_dentry_parent_queue_event(dentry, in_mask, 0,
264 dentry->d_name.name);
268 #ifdef CONFIG_INOTIFY /* inotify helpers */
271 * fsnotify_oldname_init - save off the old filename before we change it
273 static inline const char *fsnotify_oldname_init(const char *name)
275 return kstrdup(name, GFP_KERNEL);
279 * fsnotify_oldname_free - free the name we got from fsnotify_oldname_init
281 static inline void fsnotify_oldname_free(const char *old_name)
286 #else /* CONFIG_INOTIFY */
288 static inline const char *fsnotify_oldname_init(const char *name)
293 static inline void fsnotify_oldname_free(const char *old_name)
297 #endif /* ! CONFIG_INOTIFY */
299 #endif /* __KERNEL__ */
301 #endif /* _LINUX_FS_NOTIFY_H */