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/fsnotify_backend.h>
17 #include <linux/audit.h>
20 * fsnotify_d_instantiate - instantiate a dentry for inode
21 * Called with dcache_lock held.
23 static inline void fsnotify_d_instantiate(struct dentry *entry,
26 __fsnotify_d_instantiate(entry, inode);
28 inotify_d_instantiate(entry, inode);
31 /* Notify this dentry's parent about a child's events. */
32 static inline void fsnotify_parent(struct dentry *dentry, __u32 mask)
34 __fsnotify_parent(dentry, mask);
36 inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name);
40 * fsnotify_d_move - entry has been moved
41 * Called with dcache_lock and entry->d_lock held.
43 static inline void fsnotify_d_move(struct dentry *entry)
46 * On move we need to update entry->d_flags to indicate if the new parent
47 * cares about events from this entry.
49 __fsnotify_update_dcache_flags(entry);
51 inotify_d_move(entry);
55 * fsnotify_link_count - inode's link count changed
57 static inline void fsnotify_link_count(struct inode *inode)
59 inotify_inode_queue_event(inode, IN_ATTRIB, 0, NULL, NULL);
61 fsnotify(inode, FS_ATTRIB, inode, FSNOTIFY_EVENT_INODE);
65 * fsnotify_move - file old_name at old_dir was moved to new_name at new_dir
67 static inline void fsnotify_move(struct inode *old_dir, struct inode *new_dir,
68 const char *old_name, const char *new_name,
69 int isdir, struct inode *target, struct dentry *moved)
71 struct inode *source = moved->d_inode;
72 u32 cookie = inotify_get_cookie();
73 __u32 old_dir_mask = 0;
74 __u32 new_dir_mask = 0;
76 if (old_dir == new_dir) {
77 old_dir_mask = FS_DN_RENAME;
82 old_dir_mask |= FS_IN_ISDIR;
83 new_dir_mask |= FS_IN_ISDIR;
86 old_dir_mask |= FS_MOVED_FROM;
87 new_dir_mask |= FS_MOVED_TO;
89 inotify_inode_queue_event(old_dir, IN_MOVED_FROM|isdir,cookie,old_name,
91 inotify_inode_queue_event(new_dir, IN_MOVED_TO|isdir, cookie, new_name,
94 fsnotify(old_dir, old_dir_mask, old_dir, FSNOTIFY_EVENT_INODE);
95 fsnotify(new_dir, new_dir_mask, new_dir, FSNOTIFY_EVENT_INODE);
98 inotify_inode_queue_event(target, IN_DELETE_SELF, 0, NULL, NULL);
99 inotify_inode_is_dead(target);
101 /* this is really a link_count change not a removal */
102 fsnotify_link_count(target);
106 inotify_inode_queue_event(source, IN_MOVE_SELF, 0, NULL, NULL);
107 fsnotify(source, FS_MOVE_SELF, moved->d_inode, FSNOTIFY_EVENT_INODE);
109 audit_inode_child(new_name, moved, new_dir);
113 * fsnotify_inode_delete - and inode is being evicted from cache, clean up is needed
115 static inline void fsnotify_inode_delete(struct inode *inode)
117 __fsnotify_inode_delete(inode);
121 * fsnotify_nameremove - a filename was removed from a directory
123 static inline void fsnotify_nameremove(struct dentry *dentry, int isdir)
125 __u32 mask = FS_DELETE;
130 fsnotify_parent(dentry, mask);
134 * fsnotify_inoderemove - an inode is going away
136 static inline void fsnotify_inoderemove(struct inode *inode)
138 inotify_inode_queue_event(inode, IN_DELETE_SELF, 0, NULL, NULL);
139 inotify_inode_is_dead(inode);
141 fsnotify(inode, FS_DELETE_SELF, inode, FSNOTIFY_EVENT_INODE);
142 __fsnotify_inode_delete(inode);
146 * fsnotify_create - 'name' was linked in
148 static inline void fsnotify_create(struct inode *inode, struct dentry *dentry)
150 inotify_inode_queue_event(inode, IN_CREATE, 0, dentry->d_name.name,
152 audit_inode_child(dentry->d_name.name, dentry, inode);
154 fsnotify(inode, FS_CREATE, dentry->d_inode, FSNOTIFY_EVENT_INODE);
158 * fsnotify_link - new hardlink in 'inode' directory
159 * Note: We have to pass also the linked inode ptr as some filesystems leave
160 * new_dentry->d_inode NULL and instantiate inode pointer later
162 static inline void fsnotify_link(struct inode *dir, struct inode *inode, struct dentry *new_dentry)
164 inotify_inode_queue_event(dir, IN_CREATE, 0, new_dentry->d_name.name,
166 fsnotify_link_count(inode);
167 audit_inode_child(new_dentry->d_name.name, new_dentry, dir);
169 fsnotify(dir, FS_CREATE, inode, FSNOTIFY_EVENT_INODE);
173 * fsnotify_mkdir - directory 'name' was created
175 static inline void fsnotify_mkdir(struct inode *inode, struct dentry *dentry)
177 __u32 mask = (FS_CREATE | FS_IN_ISDIR);
178 struct inode *d_inode = dentry->d_inode;
180 inotify_inode_queue_event(inode, mask, 0, dentry->d_name.name, d_inode);
181 audit_inode_child(dentry->d_name.name, dentry, inode);
183 fsnotify(inode, mask, d_inode, FSNOTIFY_EVENT_INODE);
187 * fsnotify_access - file was read
189 static inline void fsnotify_access(struct dentry *dentry)
191 struct inode *inode = dentry->d_inode;
192 __u32 mask = FS_ACCESS;
194 if (S_ISDIR(inode->i_mode))
197 inotify_inode_queue_event(inode, mask, 0, NULL, NULL);
199 fsnotify_parent(dentry, mask);
200 fsnotify(inode, mask, inode, FSNOTIFY_EVENT_INODE);
204 * fsnotify_modify - file was modified
206 static inline void fsnotify_modify(struct dentry *dentry)
208 struct inode *inode = dentry->d_inode;
209 __u32 mask = FS_MODIFY;
211 if (S_ISDIR(inode->i_mode))
214 inotify_inode_queue_event(inode, mask, 0, NULL, NULL);
216 fsnotify_parent(dentry, mask);
217 fsnotify(inode, mask, inode, FSNOTIFY_EVENT_INODE);
221 * fsnotify_open - file was opened
223 static inline void fsnotify_open(struct dentry *dentry)
225 struct inode *inode = dentry->d_inode;
226 __u32 mask = FS_OPEN;
228 if (S_ISDIR(inode->i_mode))
231 inotify_inode_queue_event(inode, mask, 0, NULL, NULL);
233 fsnotify_parent(dentry, mask);
234 fsnotify(inode, mask, inode, FSNOTIFY_EVENT_INODE);
238 * fsnotify_close - file was closed
240 static inline void fsnotify_close(struct file *file)
242 struct dentry *dentry = file->f_path.dentry;
243 struct inode *inode = dentry->d_inode;
244 fmode_t mode = file->f_mode;
245 __u32 mask = (mode & FMODE_WRITE) ? FS_CLOSE_WRITE : FS_CLOSE_NOWRITE;
247 if (S_ISDIR(inode->i_mode))
250 inotify_inode_queue_event(inode, mask, 0, NULL, NULL);
252 fsnotify_parent(dentry, mask);
253 fsnotify(inode, mask, file, FSNOTIFY_EVENT_FILE);
257 * fsnotify_xattr - extended attributes were changed
259 static inline void fsnotify_xattr(struct dentry *dentry)
261 struct inode *inode = dentry->d_inode;
262 __u32 mask = FS_ATTRIB;
264 if (S_ISDIR(inode->i_mode))
267 inotify_inode_queue_event(inode, mask, 0, NULL, NULL);
269 fsnotify_parent(dentry, mask);
270 fsnotify(inode, mask, inode, FSNOTIFY_EVENT_INODE);
274 * fsnotify_change - notify_change event. file was modified and/or metadata
277 static inline void fsnotify_change(struct dentry *dentry, unsigned int ia_valid)
279 struct inode *inode = dentry->d_inode;
282 if (ia_valid & ATTR_UID)
284 if (ia_valid & ATTR_GID)
286 if (ia_valid & ATTR_SIZE)
289 /* both times implies a utime(s) call */
290 if ((ia_valid & (ATTR_ATIME | ATTR_MTIME)) == (ATTR_ATIME | ATTR_MTIME))
292 else if (ia_valid & ATTR_ATIME)
294 else if (ia_valid & ATTR_MTIME)
297 if (ia_valid & ATTR_MODE)
301 if (S_ISDIR(inode->i_mode))
303 inotify_inode_queue_event(inode, mask, 0, NULL, NULL);
305 fsnotify_parent(dentry, mask);
306 fsnotify(inode, mask, inode, FSNOTIFY_EVENT_INODE);
310 #if defined(CONFIG_INOTIFY) || defined(CONFIG_FSNOTIFY) /* notify helpers */
313 * fsnotify_oldname_init - save off the old filename before we change it
315 static inline const char *fsnotify_oldname_init(const 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 char *old_name)
328 #else /* CONFIG_INOTIFY || CONFIG_FSNOTIFY */
330 static inline const char *fsnotify_oldname_init(const char *name)
335 static inline void fsnotify_oldname_free(const char *old_name)
339 #endif /* ! CONFIG_INOTIFY */
341 #endif /* _LINUX_FS_NOTIFY_H */