fsnotify: kill FSNOTIFY_EVENT_FILE

Some fsnotify operations send a struct file.  This is more information than
we technically need.  We instead send a struct path in all cases instead of
sometimes a path and sometimes a file.

Signed-off-by: Andreas Gruenbacher <agruen@suse.de>
Signed-off-by: Eric Paris <eparis@redhat.com>

4 files changed, 26 insertions, 36 deletions

diff --git a/fs/notify/fsnotify.c b/fs/notify/fsnotify.c
index 78c440c343a8..60e84fd338dd 100644
--- a/fs/notify/fsnotify.c
+++ b/fs/notify/fsnotify.c
@@ -79,15 +79,15 @@ void __fsnotify_update_child_dentry_flags(struct inode *inode)
 }
 
 /* Notify this dentry's parent about a child's events. */
-void __fsnotify_parent(struct file *file, struct dentry *dentry, __u32 mask)
+void __fsnotify_parent(struct path *path, struct dentry *dentry, __u32 mask)
 {
         struct dentry *parent;
         struct inode *p_inode;
         bool send = false;
         bool should_update_children = false;
 
-        if (file)
-                dentry = file->f_path.dentry;
+        if (!dentry)
+                dentry = path->dentry;
 
         if (!(dentry->d_flags & DCACHE_FSNOTIFY_PARENT_WATCHED))
                 return;
@@ -119,8 +119,8 @@ void __fsnotify_parent(struct file *file, struct dentry *dentry, __u32 mask)
                  * specifies these are events which came from a child. */
                 mask |= FS_EVENT_ON_CHILD;
 
-                if (file)
-                        fsnotify(p_inode, mask, file, FSNOTIFY_EVENT_FILE,
+                if (path)
+                        fsnotify(p_inode, mask, path, FSNOTIFY_EVENT_PATH,
                                  dentry->d_name.name, 0);
                 else
                         fsnotify(p_inode, mask, dentry->d_inode, FSNOTIFY_EVENT_INODE,
@@ -194,8 +194,6 @@ void fsnotify(struct inode *to_tell, __u32 mask, void *data, int data_is, const
  
         if (data_is == FSNOTIFY_EVENT_PATH)
                 mnt = ((struct path *)data)->mnt;
-        else if (data_is == FSNOTIFY_EVENT_FILE)
-                mnt = ((struct file *)data)->f_path.mnt;
 
         /* if this inode's directed listeners don't care and nothing on the vfsmount
          * listeners list cares, nothing to do */
diff --git a/fs/notify/notification.c b/fs/notify/notification.c
index dafd0b7687b8..066f1f988bac 100644
--- a/fs/notify/notification.c
+++ b/fs/notify/notification.c
@@ -390,15 +390,6 @@ struct fsnotify_event *fsnotify_create_event(struct inode *to_tell, __u32 mask,
         event->data_type = data_type;
 
         switch (data_type) {
-        case FSNOTIFY_EVENT_FILE: {
-                struct file *file = data;
-                struct path *path = &file->f_path;
-                event->path.dentry = path->dentry;
-                event->path.mnt = path->mnt;
-                path_get(&event->path);
-                event->data_type = FSNOTIFY_EVENT_PATH;
-                break;
-        }
         case FSNOTIFY_EVENT_PATH: {
                 struct path *path = data;
                 event->path.dentry = path->dentry;
diff --git a/include/linux/fsnotify.h b/include/linux/fsnotify.h
index 04ea03ea8090..06d296d85ebf 100644
--- a/include/linux/fsnotify.h
+++ b/include/linux/fsnotify.h
@@ -26,14 +26,12 @@ static inline void fsnotify_d_instantiate(struct dentry *entry,
 }
 
 /* Notify this dentry's parent about a child's events. */
-static inline void fsnotify_parent(struct file *file, struct dentry *dentry, __u32 mask)
+static inline void fsnotify_parent(struct path *path, struct dentry *dentry, __u32 mask)
 {
-        BUG_ON(file && dentry);
+        if (!dentry)
+                dentry = path->dentry;
 
-        if (file)
-                dentry = file->f_path.dentry;
-
-        __fsnotify_parent(file, dentry, mask);
+        __fsnotify_parent(path, dentry, mask);
 }
 
 /*
@@ -160,14 +158,15 @@ static inline void fsnotify_mkdir(struct inode *inode, struct dentry *dentry)
  */
 static inline void fsnotify_access(struct file *file)
 {
-        struct inode *inode = file->f_path.dentry->d_inode;
+        struct path *path = &file->f_path;
+        struct inode *inode = path->dentry->d_inode;
         __u32 mask = FS_ACCESS;
 
         if (S_ISDIR(inode->i_mode))
                 mask |= FS_IN_ISDIR;
 
-        fsnotify_parent(file, NULL, mask);
-        fsnotify(inode, mask, file, FSNOTIFY_EVENT_FILE, NULL, 0);
+        fsnotify_parent(path, NULL, mask);
+        fsnotify(inode, mask, path, FSNOTIFY_EVENT_PATH, NULL, 0);
 }
 
 /*
@@ -175,14 +174,15 @@ static inline void fsnotify_access(struct file *file)
  */
 static inline void fsnotify_modify(struct file *file)
 {
-        struct inode *inode = file->f_path.dentry->d_inode;
+        struct path *path = &file->f_path;
+        struct inode *inode = path->dentry->d_inode;
         __u32 mask = FS_MODIFY;
 
         if (S_ISDIR(inode->i_mode))
                 mask |= FS_IN_ISDIR;
 
-        fsnotify_parent(file, NULL, mask);
-        fsnotify(inode, mask, file, FSNOTIFY_EVENT_FILE, NULL, 0);
+        fsnotify_parent(path, NULL, mask);
+        fsnotify(inode, mask, path, FSNOTIFY_EVENT_PATH, NULL, 0);
 }
 
 /*
@@ -190,14 +190,15 @@ static inline void fsnotify_modify(struct file *file)
  */
 static inline void fsnotify_open(struct file *file)
 {
-        struct inode *inode = file->f_path.dentry->d_inode;
+        struct path *path = &file->f_path;
+        struct inode *inode = path->dentry->d_inode;
         __u32 mask = FS_OPEN;
 
         if (S_ISDIR(inode->i_mode))
                 mask |= FS_IN_ISDIR;
 
-        fsnotify_parent(file, NULL, mask);
-        fsnotify(inode, mask, file, FSNOTIFY_EVENT_FILE, NULL, 0);
+        fsnotify_parent(path, NULL, mask);
+        fsnotify(inode, mask, path, FSNOTIFY_EVENT_PATH, NULL, 0);
 }
 
 /*
@@ -205,6 +206,7 @@ static inline void fsnotify_open(struct file *file)
  */
 static inline void fsnotify_close(struct file *file)
 {
+        struct path *path = &file->f_path;
         struct inode *inode = file->f_path.dentry->d_inode;
         fmode_t mode = file->f_mode;
         __u32 mask = (mode & FMODE_WRITE) ? FS_CLOSE_WRITE : FS_CLOSE_NOWRITE;
@@ -212,8 +214,8 @@ static inline void fsnotify_close(struct file *file)
         if (S_ISDIR(inode->i_mode))
                 mask |= FS_IN_ISDIR;
 
-        fsnotify_parent(file, NULL, mask);
-        fsnotify(inode, mask, file, FSNOTIFY_EVENT_FILE, NULL, 0);
+        fsnotify_parent(path, NULL, mask);
+        fsnotify(inode, mask, path, FSNOTIFY_EVENT_PATH, NULL, 0);
 }
 
 /*
diff --git a/include/linux/fsnotify_backend.h b/include/linux/fsnotify_backend.h
index cf165857199b..7a6ba755acc3 100644
--- a/include/linux/fsnotify_backend.h
+++ b/include/linux/fsnotify_backend.h
@@ -214,7 +214,6 @@ struct fsnotify_event {
 #define FSNOTIFY_EVENT_NONE     0
 #define FSNOTIFY_EVENT_PATH     1
 #define FSNOTIFY_EVENT_INODE    2
-#define FSNOTIFY_EVENT_FILE     3
         int data_type;          /* which of the above union we have */
         atomic_t refcnt;        /* how many groups still are using/need to send this event */
         __u32 mask;             /* the type of access, bitwise OR for FS_* event types */
@@ -280,7 +279,7 @@ struct fsnotify_mark_entry {
 /* main fsnotify call to send events */
 extern void fsnotify(struct inode *to_tell, __u32 mask, void *data, int data_is,
                      const char *name, u32 cookie);
-extern void __fsnotify_parent(struct file *file, struct dentry *dentry, __u32 mask);
+extern void __fsnotify_parent(struct path *path, struct dentry *dentry, __u32 mask);
 extern void __fsnotify_inode_delete(struct inode *inode);
 extern u32 fsnotify_get_cookie(void);
 
@@ -393,7 +392,7 @@ static inline void fsnotify(struct inode *to_tell, __u32 mask, void *data, int d
                             const char *name, u32 cookie)
 {}
 
-static inline void __fsnotify_parent(struct file *file, struct dentry *dentry, __u32 mask)
+static inline void __fsnotify_parent(struct path *path, struct dentry *dentry, __u32 mask)
 {}
 
 static inline void __fsnotify_inode_delete(struct inode *inode)