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 inode *source)
46 u32 cookie = inotify_get_cookie();
48 if (old_dir == new_dir)
49 inode_dir_notify(old_dir, DN_RENAME);
51 inode_dir_notify(old_dir, DN_DELETE);
52 inode_dir_notify(new_dir, DN_CREATE);
57 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);
61 inotify_inode_queue_event(target, IN_DELETE_SELF, 0, NULL);
62 inotify_inode_is_dead(target);
66 inotify_inode_queue_event(source, IN_MOVE_SELF, 0, NULL);
68 audit_inode_child(old_name, source, old_dir->i_ino);
69 audit_inode_child(new_name, target, new_dir->i_ino);
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);
89 inotify_inode_is_dead(inode);
93 * fsnotify_create - 'name' was linked in
95 static inline void fsnotify_create(struct inode *inode, struct dentry *dentry)
97 inode_dir_notify(inode, DN_CREATE);
98 inotify_inode_queue_event(inode, IN_CREATE, 0, dentry->d_name.name);
99 audit_inode_child(dentry->d_name.name, dentry->d_inode, inode->i_ino);
103 * fsnotify_mkdir - directory 'name' was created
105 static inline void fsnotify_mkdir(struct inode *inode, struct dentry *dentry)
107 inode_dir_notify(inode, DN_CREATE);
108 inotify_inode_queue_event(inode, IN_CREATE | IN_ISDIR, 0,
109 dentry->d_name.name);
110 audit_inode_child(dentry->d_name.name, dentry->d_inode, inode->i_ino);
114 * fsnotify_access - file was read
116 static inline void fsnotify_access(struct dentry *dentry)
118 struct inode *inode = dentry->d_inode;
119 u32 mask = IN_ACCESS;
121 if (S_ISDIR(inode->i_mode))
124 dnotify_parent(dentry, DN_ACCESS);
125 inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name);
126 inotify_inode_queue_event(inode, mask, 0, NULL);
130 * fsnotify_modify - file was modified
132 static inline void fsnotify_modify(struct dentry *dentry)
134 struct inode *inode = dentry->d_inode;
135 u32 mask = IN_MODIFY;
137 if (S_ISDIR(inode->i_mode))
140 dnotify_parent(dentry, DN_MODIFY);
141 inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name);
142 inotify_inode_queue_event(inode, mask, 0, NULL);
146 * fsnotify_open - file was opened
148 static inline void fsnotify_open(struct dentry *dentry)
150 struct inode *inode = dentry->d_inode;
153 if (S_ISDIR(inode->i_mode))
156 inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name);
157 inotify_inode_queue_event(inode, mask, 0, NULL);
161 * fsnotify_close - file was closed
163 static inline void fsnotify_close(struct file *file)
165 struct dentry *dentry = file->f_dentry;
166 struct inode *inode = dentry->d_inode;
167 const char *name = dentry->d_name.name;
168 mode_t mode = file->f_mode;
169 u32 mask = (mode & FMODE_WRITE) ? IN_CLOSE_WRITE : IN_CLOSE_NOWRITE;
171 if (S_ISDIR(inode->i_mode))
174 inotify_dentry_parent_queue_event(dentry, mask, 0, name);
175 inotify_inode_queue_event(inode, mask, 0, NULL);
179 * fsnotify_xattr - extended attributes were changed
181 static inline void fsnotify_xattr(struct dentry *dentry)
183 struct inode *inode = dentry->d_inode;
184 u32 mask = IN_ATTRIB;
186 if (S_ISDIR(inode->i_mode))
189 inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name);
190 inotify_inode_queue_event(inode, mask, 0, NULL);
194 * fsnotify_change - notify_change event. file was modified and/or metadata
197 static inline void fsnotify_change(struct dentry *dentry, unsigned int ia_valid)
199 struct inode *inode = dentry->d_inode;
203 if (ia_valid & ATTR_UID) {
204 in_mask |= IN_ATTRIB;
205 dn_mask |= DN_ATTRIB;
207 if (ia_valid & ATTR_GID) {
208 in_mask |= IN_ATTRIB;
209 dn_mask |= DN_ATTRIB;
211 if (ia_valid & ATTR_SIZE) {
212 in_mask |= IN_MODIFY;
213 dn_mask |= DN_MODIFY;
215 /* both times implies a utime(s) call */
216 if ((ia_valid & (ATTR_ATIME | ATTR_MTIME)) == (ATTR_ATIME | ATTR_MTIME))
218 in_mask |= IN_ATTRIB;
219 dn_mask |= DN_ATTRIB;
220 } else if (ia_valid & ATTR_ATIME) {
221 in_mask |= IN_ACCESS;
222 dn_mask |= DN_ACCESS;
223 } else if (ia_valid & ATTR_MTIME) {
224 in_mask |= IN_MODIFY;
225 dn_mask |= DN_MODIFY;
227 if (ia_valid & ATTR_MODE) {
228 in_mask |= IN_ATTRIB;
229 dn_mask |= DN_ATTRIB;
233 dnotify_parent(dentry, dn_mask);
235 if (S_ISDIR(inode->i_mode))
237 inotify_inode_queue_event(inode, in_mask, 0, NULL);
238 inotify_dentry_parent_queue_event(dentry, in_mask, 0,
239 dentry->d_name.name);
243 #ifdef CONFIG_INOTIFY /* inotify helpers */
246 * fsnotify_oldname_init - save off the old filename before we change it
248 static inline const char *fsnotify_oldname_init(const char *name)
250 return kstrdup(name, GFP_KERNEL);
254 * fsnotify_oldname_free - free the name we got from fsnotify_oldname_init
256 static inline void fsnotify_oldname_free(const char *old_name)
261 #else /* CONFIG_INOTIFY */
263 static inline const char *fsnotify_oldname_init(const char *name)
268 static inline void fsnotify_oldname_free(const char *old_name)
272 #endif /* ! CONFIG_INOTIFY */
274 #endif /* __KERNEL__ */
276 #endif /* _LINUX_FS_NOTIFY_H */