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,
59 inotify_inode_queue_event(new_dir, IN_MOVED_TO|isdir, cookie, new_name,
63 inotify_inode_queue_event(target, IN_DELETE_SELF, 0, NULL, NULL);
64 inotify_inode_is_dead(target);
68 inotify_inode_queue_event(source, IN_MOVE_SELF, 0, NULL, NULL);
70 audit_inode_child(new_name, source, new_dir->i_ino);
74 * fsnotify_nameremove - a filename was removed from a directory
76 static inline void fsnotify_nameremove(struct dentry *dentry, int isdir)
80 dnotify_parent(dentry, DN_DELETE);
81 inotify_dentry_parent_queue_event(dentry, IN_DELETE|isdir, 0, dentry->d_name.name);
85 * fsnotify_inoderemove - an inode is going away
87 static inline void fsnotify_inoderemove(struct inode *inode)
89 inotify_inode_queue_event(inode, IN_DELETE_SELF, 0, NULL, NULL);
90 inotify_inode_is_dead(inode);
94 * fsnotify_create - 'name' was linked in
96 static inline void fsnotify_create(struct inode *inode, struct dentry *dentry)
98 inode_dir_notify(inode, DN_CREATE);
99 inotify_inode_queue_event(inode, IN_CREATE, 0, dentry->d_name.name,
101 audit_inode_child(dentry->d_name.name, dentry->d_inode, inode->i_ino);
105 * fsnotify_mkdir - directory 'name' was created
107 static inline void fsnotify_mkdir(struct inode *inode, struct dentry *dentry)
109 inode_dir_notify(inode, DN_CREATE);
110 inotify_inode_queue_event(inode, IN_CREATE | IN_ISDIR, 0,
111 dentry->d_name.name, dentry->d_inode);
112 audit_inode_child(dentry->d_name.name, dentry->d_inode, inode->i_ino);
116 * fsnotify_access - file was read
118 static inline void fsnotify_access(struct dentry *dentry)
120 struct inode *inode = dentry->d_inode;
121 u32 mask = IN_ACCESS;
123 if (S_ISDIR(inode->i_mode))
126 dnotify_parent(dentry, DN_ACCESS);
127 inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name);
128 inotify_inode_queue_event(inode, mask, 0, NULL, NULL);
132 * fsnotify_modify - file was modified
134 static inline void fsnotify_modify(struct dentry *dentry)
136 struct inode *inode = dentry->d_inode;
137 u32 mask = IN_MODIFY;
139 if (S_ISDIR(inode->i_mode))
142 dnotify_parent(dentry, DN_MODIFY);
143 inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name);
144 inotify_inode_queue_event(inode, mask, 0, NULL, NULL);
148 * fsnotify_open - file was opened
150 static inline void fsnotify_open(struct dentry *dentry)
152 struct inode *inode = dentry->d_inode;
155 if (S_ISDIR(inode->i_mode))
158 inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name);
159 inotify_inode_queue_event(inode, mask, 0, NULL, NULL);
163 * fsnotify_close - file was closed
165 static inline void fsnotify_close(struct file *file)
167 struct dentry *dentry = file->f_dentry;
168 struct inode *inode = dentry->d_inode;
169 const char *name = dentry->d_name.name;
170 mode_t mode = file->f_mode;
171 u32 mask = (mode & FMODE_WRITE) ? IN_CLOSE_WRITE : IN_CLOSE_NOWRITE;
173 if (S_ISDIR(inode->i_mode))
176 inotify_dentry_parent_queue_event(dentry, mask, 0, name);
177 inotify_inode_queue_event(inode, mask, 0, NULL, NULL);
181 * fsnotify_xattr - extended attributes were changed
183 static inline void fsnotify_xattr(struct dentry *dentry)
185 struct inode *inode = dentry->d_inode;
186 u32 mask = IN_ATTRIB;
188 if (S_ISDIR(inode->i_mode))
191 inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name);
192 inotify_inode_queue_event(inode, mask, 0, NULL, NULL);
196 * fsnotify_change - notify_change event. file was modified and/or metadata
199 static inline void fsnotify_change(struct dentry *dentry, unsigned int ia_valid)
201 struct inode *inode = dentry->d_inode;
205 if (ia_valid & ATTR_UID) {
206 in_mask |= IN_ATTRIB;
207 dn_mask |= DN_ATTRIB;
209 if (ia_valid & ATTR_GID) {
210 in_mask |= IN_ATTRIB;
211 dn_mask |= DN_ATTRIB;
213 if (ia_valid & ATTR_SIZE) {
214 in_mask |= IN_MODIFY;
215 dn_mask |= DN_MODIFY;
217 /* both times implies a utime(s) call */
218 if ((ia_valid & (ATTR_ATIME | ATTR_MTIME)) == (ATTR_ATIME | ATTR_MTIME))
220 in_mask |= IN_ATTRIB;
221 dn_mask |= DN_ATTRIB;
222 } else if (ia_valid & ATTR_ATIME) {
223 in_mask |= IN_ACCESS;
224 dn_mask |= DN_ACCESS;
225 } else if (ia_valid & ATTR_MTIME) {
226 in_mask |= IN_MODIFY;
227 dn_mask |= DN_MODIFY;
229 if (ia_valid & ATTR_MODE) {
230 in_mask |= IN_ATTRIB;
231 dn_mask |= DN_ATTRIB;
235 dnotify_parent(dentry, dn_mask);
237 if (S_ISDIR(inode->i_mode))
239 inotify_inode_queue_event(inode, in_mask, 0, NULL, NULL);
240 inotify_dentry_parent_queue_event(dentry, in_mask, 0,
241 dentry->d_name.name);
245 #ifdef CONFIG_INOTIFY /* inotify helpers */
248 * fsnotify_oldname_init - save off the old filename before we change it
250 static inline const char *fsnotify_oldname_init(const char *name)
252 return kstrdup(name, GFP_KERNEL);
256 * fsnotify_oldname_free - free the name we got from fsnotify_oldname_init
258 static inline void fsnotify_oldname_free(const char *old_name)
263 #else /* CONFIG_INOTIFY */
265 static inline const char *fsnotify_oldname_init(const char *name)
270 static inline void fsnotify_oldname_free(const char *old_name)
274 #endif /* ! CONFIG_INOTIFY */
276 #endif /* __KERNEL__ */
278 #endif /* _LINUX_FS_NOTIFY_H */