1 files changed, 58 insertions, 80 deletions

diff --git a/include/linux/fsnotify.h b/include/linux/fsnotify.h
index a2d5d175d3c1..5ab28f6c7d26 100644
--- a/include/linux/fsnotify.h
+++ b/include/linux/fsnotify.h
@@ -18,39 +18,63 @@
 #include <linux/bug.h>
 
 /*
- * Notify this @dir inode about a change in the directory entry @dentry.
+ * Notify this @dir inode about a change in a child directory entry.
+ * The directory entry may have turned positive or negative or its inode may
+ * have changed (i.e. renamed over).
  *
  * Unlike fsnotify_parent(), the event will be reported regardless of the
  * FS_EVENT_ON_CHILD mask on the parent inode.
  */
-static inline int fsnotify_dirent(struct inode *dir, struct dentry *dentry,
-				  __u32 mask)
+static inline void fsnotify_name(struct inode *dir, __u32 mask,
+				 struct inode *child,
+				 const struct qstr *name, u32 cookie)
 {
-	return fsnotify(dir, mask, d_inode(dentry), FSNOTIFY_EVENT_INODE,
-			&dentry->d_name, 0);
+	fsnotify(dir, mask, child, FSNOTIFY_EVENT_INODE, name, cookie);
+	/*
+	 * Send another flavor of the event without child inode data and
+	 * without the specific event type (e.g. FS_CREATE|FS_IS_DIR).
+	 * The name is relative to the dir inode the event is reported to.
+	 */
+	fsnotify(dir, FS_DIR_MODIFY, dir, FSNOTIFY_EVENT_INODE, name, 0);
 }
 
-/* Notify this dentry's parent about a child's events. */
-static inline int fsnotify_parent(const struct path *path,
-				  struct dentry *dentry, __u32 mask)
+static inline void fsnotify_dirent(struct inode *dir, struct dentry *dentry,
+				   __u32 mask)
 {
-	if (!dentry)
-		dentry = path->dentry;
-
-	return __fsnotify_parent(path, dentry, mask);
+	fsnotify_name(dir, mask, d_inode(dentry), &dentry->d_name, 0);
 }
 
 /*
- * Simple wrapper to consolidate calls fsnotify_parent()/fsnotify() when
- * an event is on a path.
+ * Simple wrappers to consolidate calls fsnotify_parent()/fsnotify() when
+ * an event is on a file/dentry.
  */
-static inline int fsnotify_path(struct inode *inode, const struct path *path,
-				__u32 mask)
+static inline void fsnotify_dentry(struct dentry *dentry, __u32 mask)
+{
+	struct inode *inode = d_inode(dentry);
+
+	if (S_ISDIR(inode->i_mode))
+		mask |= FS_ISDIR;
+
+	fsnotify_parent(dentry, mask, inode, FSNOTIFY_EVENT_INODE);
+	fsnotify(inode, mask, inode, FSNOTIFY_EVENT_INODE, NULL, 0);
+}
+
+static inline int fsnotify_file(struct file *file, __u32 mask)
 {
-	int ret = fsnotify_parent(path, NULL, mask);
+	const struct path *path = &file->f_path;
+	struct inode *inode = file_inode(file);
+	int ret;
+
+	if (file->f_mode & FMODE_NONOTIFY)
+		return 0;
+
+	if (S_ISDIR(inode->i_mode))
+		mask |= FS_ISDIR;
 
+	ret = fsnotify_parent(path->dentry, mask, path, FSNOTIFY_EVENT_PATH);
 	if (ret)
 		return ret;
+
 	return fsnotify(inode, mask, path, FSNOTIFY_EVENT_PATH, NULL, 0);
 }
 
@@ -58,19 +82,16 @@ static inline int fsnotify_path(struct inode *inode, const struct path *path,
 static inline int fsnotify_perm(struct file *file, int mask)
 {
 	int ret;
-	const struct path *path = &file->f_path;
-	struct inode *inode = file_inode(file);
 	__u32 fsnotify_mask = 0;
 
-	if (file->f_mode & FMODE_NONOTIFY)
-		return 0;
 	if (!(mask & (MAY_READ | MAY_OPEN)))
 		return 0;
+
 	if (mask & MAY_OPEN) {
 		fsnotify_mask = FS_OPEN_PERM;
 
 		if (file->f_flags & __FMODE_EXEC) {
-			ret = fsnotify_path(inode, path, FS_OPEN_EXEC_PERM);
+			ret = fsnotify_file(file, FS_OPEN_EXEC_PERM);
 
 			if (ret)
 				return ret;
@@ -79,10 +100,7 @@ static inline int fsnotify_perm(struct file *file, int mask)
 		fsnotify_mask = FS_ACCESS_PERM;
 	}
 
-	if (S_ISDIR(inode->i_mode))
-		fsnotify_mask |= FS_ISDIR;
-
-	return fsnotify_path(inode, path, fsnotify_mask);
+	return fsnotify_file(file, fsnotify_mask);
 }
 
 /*
@@ -122,10 +140,8 @@ static inline void fsnotify_move(struct inode *old_dir, struct inode *new_dir,
 		mask |= FS_ISDIR;
 	}
 
-	fsnotify(old_dir, old_dir_mask, source, FSNOTIFY_EVENT_INODE, old_name,
-		 fs_cookie);
-	fsnotify(new_dir, new_dir_mask, source, FSNOTIFY_EVENT_INODE, new_name,
-		 fs_cookie);
+	fsnotify_name(old_dir, old_dir_mask, source, old_name, fs_cookie);
+	fsnotify_name(new_dir, new_dir_mask, source, new_name, fs_cookie);
 
 	if (target)
 		fsnotify_link_count(target);
@@ -180,12 +196,13 @@ static inline void fsnotify_create(struct inode *inode, struct dentry *dentry)
  * Note: We have to pass also the linked inode ptr as some filesystems leave
  *   new_dentry->d_inode NULL and instantiate inode pointer later
  */
-static inline void fsnotify_link(struct inode *dir, struct inode *inode, struct dentry *new_dentry)
+static inline void fsnotify_link(struct inode *dir, struct inode *inode,
+				 struct dentry *new_dentry)
 {
 	fsnotify_link_count(inode);
 	audit_inode_child(dir, new_dentry, AUDIT_TYPE_CHILD_CREATE);
 
-	fsnotify(dir, FS_CREATE, inode, FSNOTIFY_EVENT_INODE, &new_dentry->d_name, 0);
+	fsnotify_name(dir, FS_CREATE, inode, &new_dentry->d_name, 0);
 }
 
 /*
@@ -229,15 +246,7 @@ static inline void fsnotify_rmdir(struct inode *dir, struct dentry *dentry)
  */
 static inline void fsnotify_access(struct file *file)
 {
-	const struct path *path = &file->f_path;
-	struct inode *inode = file_inode(file);
-	__u32 mask = FS_ACCESS;
-
-	if (S_ISDIR(inode->i_mode))
-		mask |= FS_ISDIR;
-
-	if (!(file->f_mode & FMODE_NONOTIFY))
-		fsnotify_path(inode, path, mask);
+	fsnotify_file(file, FS_ACCESS);
 }
 
 /*
@@ -245,15 +254,7 @@ static inline void fsnotify_access(struct file *file)
  */
 static inline void fsnotify_modify(struct file *file)
 {
-	const struct path *path = &file->f_path;
-	struct inode *inode = file_inode(file);
-	__u32 mask = FS_MODIFY;
-
-	if (S_ISDIR(inode->i_mode))
-		mask |= FS_ISDIR;
-
-	if (!(file->f_mode & FMODE_NONOTIFY))
-		fsnotify_path(inode, path, mask);
+	fsnotify_file(file, FS_MODIFY);
 }
 
 /*
@@ -261,16 +262,12 @@ static inline void fsnotify_modify(struct file *file)
  */
 static inline void fsnotify_open(struct file *file)
 {
-	const struct path *path = &file->f_path;
-	struct inode *inode = file_inode(file);
 	__u32 mask = FS_OPEN;
 
-	if (S_ISDIR(inode->i_mode))
-		mask |= FS_ISDIR;
 	if (file->f_flags & __FMODE_EXEC)
 		mask |= FS_OPEN_EXEC;
 
-	fsnotify_path(inode, path, mask);
+	fsnotify_file(file, mask);
 }
 
 /*
@@ -278,16 +275,10 @@ static inline void fsnotify_open(struct file *file)
  */
 static inline void fsnotify_close(struct file *file)
 {
-	const struct path *path = &file->f_path;
-	struct inode *inode = file_inode(file);
-	fmode_t mode = file->f_mode;
-	__u32 mask = (mode & FMODE_WRITE) ? FS_CLOSE_WRITE : FS_CLOSE_NOWRITE;
+	__u32 mask = (file->f_mode & FMODE_WRITE) ? FS_CLOSE_WRITE :
+						    FS_CLOSE_NOWRITE;
 
-	if (S_ISDIR(inode->i_mode))
-		mask |= FS_ISDIR;
-
-	if (!(file->f_mode & FMODE_NONOTIFY))
-		fsnotify_path(inode, path, mask);
+	fsnotify_file(file, mask);
 }
 
 /*
@@ -295,14 +286,7 @@ static inline void fsnotify_close(struct file *file)
  */
 static inline void fsnotify_xattr(struct dentry *dentry)
 {
-	struct inode *inode = dentry->d_inode;
-	__u32 mask = FS_ATTRIB;
-
-	if (S_ISDIR(inode->i_mode))
-		mask |= FS_ISDIR;
-
-	fsnotify_parent(NULL, dentry, mask);
-	fsnotify(inode, mask, inode, FSNOTIFY_EVENT_INODE, NULL, 0);
+	fsnotify_dentry(dentry, FS_ATTRIB);
 }
 
 /*
@@ -311,7 +295,6 @@ static inline void fsnotify_xattr(struct dentry *dentry)
  */
 static inline void fsnotify_change(struct dentry *dentry, unsigned int ia_valid)
 {
-	struct inode *inode = dentry->d_inode;
 	__u32 mask = 0;
 
 	if (ia_valid & ATTR_UID)
@@ -332,13 +315,8 @@ static inline void fsnotify_change(struct dentry *dentry, unsigned int ia_valid)
 	if (ia_valid & ATTR_MODE)
 		mask |= FS_ATTRIB;
 
-	if (mask) {
-		if (S_ISDIR(inode->i_mode))
-			mask |= FS_ISDIR;
-
-		fsnotify_parent(NULL, dentry, mask);
-		fsnotify(inode, mask, inode, FSNOTIFY_EVENT_INODE, NULL, 0);
-	}
+	if (mask)
+		fsnotify_dentry(dentry, mask);
 }
 
 #endif	/* _LINUX_FS_NOTIFY_H */