[patch 1/4] vfs: path_{get,put}() cleanups

Here are some more places where path_{get,put}() can be used instead of
dput()/mntput() pair.

Signed-off-by: Jan Blunck <jblunck@suse.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

2 files changed, 9 insertions, 12 deletions

diff --git a/fs/namei.c b/fs/namei.c
index c7e43536c49a..ee1544696e83 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -581,15 +581,13 @@ static __always_inline int link_path_walk(const char *name, struct nameidata *nd
         int result;
 
         /* make sure the stuff we saved doesn't go away */
-        dget(save.dentry);
-        mntget(save.mnt);
+        path_get(&save);
 
         result = __link_path_walk(name, nd);
         if (result == -ESTALE) {
                 /* nd->path had been dropped */
                 nd->path = save;
-                dget(nd->path.dentry);
-                mntget(nd->path.mnt);
+                path_get(&nd->path);
                 nd->flags |= LOOKUP_REVAL;
                 result = __link_path_walk(name, nd);
         }
@@ -1216,8 +1214,9 @@ int vfs_path_lookup(struct dentry *dentry, struct vfsmount *mnt,
         nd->flags = flags;
         nd->depth = 0;
 
-        nd->path.mnt = mntget(mnt);
-        nd->path.dentry = dget(dentry);
+        nd->path.dentry = dentry;
+        nd->path.mnt = mnt;
+        path_get(&nd->path);
 
         retval = path_walk(name, nd);
         if (unlikely(!retval && !audit_dummy_context() && nd->path.dentry &&
diff --git a/fs/pipe.c b/fs/pipe.c
index ec228bc9f882..700f4e0d9572 100644
--- a/fs/pipe.c
+++ b/fs/pipe.c
@@ -1003,8 +1003,7 @@ struct file *create_write_pipe(void)
 void free_write_pipe(struct file *f)
 {
         free_pipe_info(f->f_dentry->d_inode);
-        dput(f->f_path.dentry);
-        mntput(f->f_path.mnt);
+        path_put(&f->f_path);
         put_filp(f);
 }
 
@@ -1015,8 +1014,8 @@ struct file *create_read_pipe(struct file *wrf)
                 return ERR_PTR(-ENFILE);
 
         /* Grab pipe from the writer */
-        f->f_path.mnt = mntget(wrf->f_path.mnt);
-        f->f_path.dentry = dget(wrf->f_path.dentry);
+        f->f_path = wrf->f_path;
+        path_get(&wrf->f_path);
         f->f_mapping = wrf->f_path.dentry->d_inode->i_mapping;
 
         f->f_pos = 0;
@@ -1068,8 +1067,7 @@ int do_pipe(int *fd)
  err_fdr:
         put_unused_fd(fdr);
  err_read_pipe:
-        dput(fr->f_dentry);
-        mntput(fr->f_vfsmnt);
+        path_put(&fr->f_path);
         put_filp(fr);
  err_write_pipe:
         free_write_pipe(fw);