fsnotify: simplify arguments passing to fsnotify_parent()

Instead of passing both dentry and path and having to figure out which
one to use, pass data/data_type to simplify the code.

Link: https://lore.kernel.org/r/20200319151022.31456-6-amir73il@gmail.com
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>

diff --git a/fs/notify/fsnotify.c b/fs/notify/fsnotify.c
index a5d6467..193530f 100644 (file)
--- a/fs/notify/fsnotify.c
+++ b/fs/notify/fsnotify.c
@@ -143,15 +143,13 @@ void __fsnotify_update_child_dentry_flags(struct inode *inode)
 }
 
 /* Notify this dentry's parent about a child's events. */
-int __fsnotify_parent(const struct path *path, struct dentry *dentry, __u32 mask)
+int fsnotify_parent(struct dentry *dentry, __u32 mask, const void *data,
+                   int data_type)
 {
        struct dentry *parent;
        struct inode *p_inode;
        int ret = 0;
 
-       if (!dentry)
-               dentry = path->dentry;
-
        if (!(dentry->d_flags & DCACHE_FSNOTIFY_PARENT_WATCHED))
                return 0;
 
@@ -168,12 +166,7 @@ int __fsnotify_parent(const struct path *path, struct dentry *dentry, __u32 mask
                mask |= FS_EVENT_ON_CHILD;
 
                take_dentry_name_snapshot(&name, dentry);
-               if (path)
-                       ret = fsnotify(p_inode, mask, path, FSNOTIFY_EVENT_PATH,
-                                      &name.name, 0);
-               else
-                       ret = fsnotify(p_inode, mask, dentry->d_inode, FSNOTIFY_EVENT_INODE,
-                                      &name.name, 0);
+               ret = fsnotify(p_inode, mask, data, data_type, &name.name, 0);
                release_dentry_name_snapshot(&name);
        }
 
@@ -181,7 +174,7 @@ int __fsnotify_parent(const struct path *path, struct dentry *dentry, __u32 mask
 
        return ret;
 }
-EXPORT_SYMBOL_GPL(__fsnotify_parent);
+EXPORT_SYMBOL_GPL(fsnotify_parent);
 
 static int send_to_group(struct inode *to_tell,
                         __u32 mask, const void *data,

diff --git a/include/linux/fsnotify.h b/include/linux/fsnotify.h
index 751da17..860018f 100644 (file)
--- a/include/linux/fsnotify.h
+++ b/include/linux/fsnotify.h
@@ -38,16 +38,6 @@ static inline void fsnotify_dirent(struct inode *dir, struct dentry *dentry,
        fsnotify_name(dir, mask, d_inode(dentry), &dentry->d_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)
-{
-       if (!dentry)
-               dentry = path->dentry;
-
-       return __fsnotify_parent(path, dentry, mask);
-}
-
 /*
  * Simple wrappers to consolidate calls fsnotify_parent()/fsnotify() when
  * an event is on a file/dentry.
@@ -59,7 +49,7 @@ static inline void fsnotify_dentry(struct dentry *dentry, __u32 mask)
        if (S_ISDIR(inode->i_mode))
                mask |= FS_ISDIR;
 
-       fsnotify_parent(NULL, dentry, mask);
+       fsnotify_parent(dentry, mask, inode, FSNOTIFY_EVENT_INODE);
        fsnotify(inode, mask, inode, FSNOTIFY_EVENT_INODE, NULL, 0);
 }
 
@@ -75,7 +65,7 @@ static inline int fsnotify_file(struct file *file, __u32 mask)
        if (S_ISDIR(inode->i_mode))
                mask |= FS_ISDIR;
 
-       ret = fsnotify_parent(path, NULL, mask);
+       ret = fsnotify_parent(path->dentry, mask, path, FSNOTIFY_EVENT_PATH);
        if (ret)
                return ret;
 

diff --git a/include/linux/fsnotify_backend.h b/include/linux/fsnotify_backend.h
index 5cc838d..337c87c 100644 (file)
--- a/include/linux/fsnotify_backend.h
+++ b/include/linux/fsnotify_backend.h
@@ -376,9 +376,10 @@ struct fsnotify_mark {
 /* called from the vfs helpers */
 
 /* main fsnotify call to send events */
-extern int fsnotify(struct inode *to_tell, __u32 mask, const void *data, int data_is,
-                   const struct qstr *name, u32 cookie);
-extern int __fsnotify_parent(const struct path *path, struct dentry *dentry, __u32 mask);
+extern int fsnotify(struct inode *to_tell, __u32 mask, const void *data,
+                   int data_type, const struct qstr *name, u32 cookie);
+extern int fsnotify_parent(struct dentry *dentry, __u32 mask, const void *data,
+                          int data_type);
 extern void __fsnotify_inode_delete(struct inode *inode);
 extern void __fsnotify_vfsmount_delete(struct vfsmount *mnt);
 extern void fsnotify_sb_delete(struct super_block *sb);
@@ -533,13 +534,14 @@ static inline void fsnotify_init_event(struct fsnotify_event *event,
 
 #else
 
-static inline int fsnotify(struct inode *to_tell, __u32 mask, const void *data, int data_is,
-                          const struct qstr *name, u32 cookie)
+static inline int fsnotify(struct inode *to_tell, __u32 mask, const void *data,
+                          int data_type, const struct qstr *name, u32 cookie)
 {
        return 0;
 }
 
-static inline int __fsnotify_parent(const struct path *path, struct dentry *dentry, __u32 mask)
+static inline int fsnotify_parent(struct dentry *dentry, __u32 mask,
+                                 const void *data, int data_type)
 {
        return 0;
 }