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/fsnotify_backend.h>
15 #include <linux/audit.h>
16 #include <linux/slab.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 *dentry,
25 __fsnotify_d_instantiate(dentry, inode);
28 /* Notify this dentry's parent about a child's events. */
29 static inline void fsnotify_parent(struct path *path, struct dentry *dentry, __u32 mask)
32 dentry = path->dentry;
34 __fsnotify_parent(path, dentry, mask);
38 * fsnotify_d_move - dentry has been moved
39 * Called with dcache_lock and dentry->d_lock held.
41 static inline void fsnotify_d_move(struct dentry *dentry)
44 * On move we need to update dentry->d_flags to indicate if the new parent
45 * cares about events from this dentry.
47 __fsnotify_update_dcache_flags(dentry);
51 * fsnotify_link_count - inode's link count changed
53 static inline void fsnotify_link_count(struct inode *inode)
55 fsnotify(inode, FS_ATTRIB, inode, FSNOTIFY_EVENT_INODE, NULL, 0);
59 * fsnotify_move - file old_name at old_dir was moved to new_name at new_dir
61 static inline void fsnotify_move(struct inode *old_dir, struct inode *new_dir,
63 int isdir, struct inode *target, struct dentry *moved)
65 struct inode *source = moved->d_inode;
66 u32 fs_cookie = fsnotify_get_cookie();
67 __u32 old_dir_mask = (FS_EVENT_ON_CHILD | FS_MOVED_FROM);
68 __u32 new_dir_mask = (FS_EVENT_ON_CHILD | FS_MOVED_TO);
69 const char *new_name = moved->d_name.name;
71 if (old_dir == new_dir)
72 old_dir_mask |= FS_DN_RENAME;
75 old_dir_mask |= FS_IN_ISDIR;
76 new_dir_mask |= FS_IN_ISDIR;
79 fsnotify(old_dir, old_dir_mask, old_dir, FSNOTIFY_EVENT_INODE, old_name, fs_cookie);
80 fsnotify(new_dir, new_dir_mask, new_dir, FSNOTIFY_EVENT_INODE, new_name, fs_cookie);
83 fsnotify_link_count(target);
86 fsnotify(source, FS_MOVE_SELF, moved->d_inode, FSNOTIFY_EVENT_INODE, NULL, 0);
87 audit_inode_child(moved, new_dir);
91 * fsnotify_inode_delete - and inode is being evicted from cache, clean up is needed
93 static inline void fsnotify_inode_delete(struct inode *inode)
95 __fsnotify_inode_delete(inode);
99 * fsnotify_nameremove - a filename was removed from a directory
101 static inline void fsnotify_nameremove(struct dentry *dentry, int isdir)
103 __u32 mask = FS_DELETE;
108 fsnotify_parent(NULL, dentry, mask);
112 * fsnotify_inoderemove - an inode is going away
114 static inline void fsnotify_inoderemove(struct inode *inode)
116 fsnotify(inode, FS_DELETE_SELF, inode, FSNOTIFY_EVENT_INODE, NULL, 0);
117 __fsnotify_inode_delete(inode);
121 * fsnotify_create - 'name' was linked in
123 static inline void fsnotify_create(struct inode *inode, struct dentry *dentry)
125 audit_inode_child(dentry, inode);
127 fsnotify(inode, FS_CREATE, dentry->d_inode, FSNOTIFY_EVENT_INODE, dentry->d_name.name, 0);
131 * fsnotify_link - new hardlink in 'inode' directory
132 * Note: We have to pass also the linked inode ptr as some filesystems leave
133 * new_dentry->d_inode NULL and instantiate inode pointer later
135 static inline void fsnotify_link(struct inode *dir, struct inode *inode, struct dentry *new_dentry)
137 fsnotify_link_count(inode);
138 audit_inode_child(new_dentry, dir);
140 fsnotify(dir, FS_CREATE, inode, FSNOTIFY_EVENT_INODE, new_dentry->d_name.name, 0);
144 * fsnotify_mkdir - directory 'name' was created
146 static inline void fsnotify_mkdir(struct inode *inode, struct dentry *dentry)
148 __u32 mask = (FS_CREATE | FS_IN_ISDIR);
149 struct inode *d_inode = dentry->d_inode;
151 audit_inode_child(dentry, inode);
153 fsnotify(inode, mask, d_inode, FSNOTIFY_EVENT_INODE, dentry->d_name.name, 0);
157 * fsnotify_access - file was read
159 static inline void fsnotify_access(struct file *file)
161 struct path *path = &file->f_path;
162 struct inode *inode = path->dentry->d_inode;
163 __u32 mask = FS_ACCESS;
165 if (S_ISDIR(inode->i_mode))
168 fsnotify_parent(path, NULL, mask);
169 fsnotify(inode, mask, path, FSNOTIFY_EVENT_PATH, NULL, 0);
173 * fsnotify_modify - file was modified
175 static inline void fsnotify_modify(struct file *file)
177 struct path *path = &file->f_path;
178 struct inode *inode = path->dentry->d_inode;
179 __u32 mask = FS_MODIFY;
181 if (S_ISDIR(inode->i_mode))
184 fsnotify_parent(path, NULL, mask);
185 fsnotify(inode, mask, path, FSNOTIFY_EVENT_PATH, NULL, 0);
189 * fsnotify_open - file was opened
191 static inline void fsnotify_open(struct file *file)
193 struct path *path = &file->f_path;
194 struct inode *inode = path->dentry->d_inode;
195 __u32 mask = FS_OPEN;
197 if (S_ISDIR(inode->i_mode))
200 fsnotify_parent(path, NULL, mask);
201 fsnotify(inode, mask, path, FSNOTIFY_EVENT_PATH, NULL, 0);
205 * fsnotify_close - file was closed
207 static inline void fsnotify_close(struct file *file)
209 struct path *path = &file->f_path;
210 struct inode *inode = file->f_path.dentry->d_inode;
211 fmode_t mode = file->f_mode;
212 __u32 mask = (mode & FMODE_WRITE) ? FS_CLOSE_WRITE : FS_CLOSE_NOWRITE;
214 if (S_ISDIR(inode->i_mode))
217 fsnotify_parent(path, NULL, mask);
218 fsnotify(inode, mask, path, FSNOTIFY_EVENT_PATH, NULL, 0);
222 * fsnotify_xattr - extended attributes were changed
224 static inline void fsnotify_xattr(struct dentry *dentry)
226 struct inode *inode = dentry->d_inode;
227 __u32 mask = FS_ATTRIB;
229 if (S_ISDIR(inode->i_mode))
232 fsnotify_parent(NULL, dentry, mask);
233 fsnotify(inode, mask, inode, FSNOTIFY_EVENT_INODE, NULL, 0);
237 * fsnotify_change - notify_change event. file was modified and/or metadata
240 static inline void fsnotify_change(struct dentry *dentry, unsigned int ia_valid)
242 struct inode *inode = dentry->d_inode;
245 if (ia_valid & ATTR_UID)
247 if (ia_valid & ATTR_GID)
249 if (ia_valid & ATTR_SIZE)
252 /* both times implies a utime(s) call */
253 if ((ia_valid & (ATTR_ATIME | ATTR_MTIME)) == (ATTR_ATIME | ATTR_MTIME))
255 else if (ia_valid & ATTR_ATIME)
257 else if (ia_valid & ATTR_MTIME)
260 if (ia_valid & ATTR_MODE)
264 if (S_ISDIR(inode->i_mode))
267 fsnotify_parent(NULL, dentry, mask);
268 fsnotify(inode, mask, inode, FSNOTIFY_EVENT_INODE, NULL, 0);
272 #if defined(CONFIG_FSNOTIFY) /* notify helpers */
275 * fsnotify_oldname_init - save off the old filename before we change it
277 static inline const char *fsnotify_oldname_init(const char *name)
279 return kstrdup(name, GFP_KERNEL);
283 * fsnotify_oldname_free - free the name we got from fsnotify_oldname_init
285 static inline void fsnotify_oldname_free(const char *old_name)
290 #else /* CONFIG_FSNOTIFY */
292 static inline const char *fsnotify_oldname_init(const char *name)
297 static inline void fsnotify_oldname_free(const char *old_name)
301 #endif /* CONFIG_FSNOTIFY */
303 #endif /* _LINUX_FS_NOTIFY_H */