fs: get mnt_writers count for an open backing file's real path

[linux-2.6-block.git] / fs / internal.h

diff --git a/fs/internal.h b/fs/internal.h
index f08d8fe3ae5e81d4252087d5553ae309a4136761..4e93a685bdaa6e88e4f8d6f0e4b2b5d082a5148c 100644 (file)
--- a/fs/internal.h
+++ b/fs/internal.h
@@ -96,13 +96,20 @@ struct file *alloc_empty_file_noaccount(int flags, const struct cred *cred);
 struct file *alloc_empty_backing_file(int flags, const struct cred *cred);
 void release_empty_file(struct file *f);
 
+static inline void file_put_write_access(struct file *file)
+{
+       put_write_access(file->f_inode);
+       mnt_put_write_access(file->f_path.mnt);
+       if (unlikely(file->f_mode & FMODE_BACKING))
+               mnt_put_write_access(backing_file_real_path(file)->mnt);
+}
+
 static inline void put_file_access(struct file *file)
 {
        if ((file->f_mode & (FMODE_READ | FMODE_WRITE)) == FMODE_READ) {
                i_readcount_dec(file->f_inode);
        } else if (file->f_mode & FMODE_WRITER) {
-               put_write_access(file->f_inode);
-               mnt_put_write_access(file->f_path.mnt);
+               file_put_write_access(file);
        }
 }