Revert "vfs: do get_write_access() on upper layer of overlayfs"

[linux-block.git] / fs / open.c

diff --git a/fs/open.c b/fs/open.c
index a973ca07489680f3e6ea6cc09b5d66546eea3da7..72bcae72bce9c212e4756a1faf1944370d30b912 100644 (file)
--- a/fs/open.c
+++ b/fs/open.c
@@ -68,7 +68,6 @@ int do_truncate(struct dentry *dentry, loff_t length, unsigned int time_attrs,
 long vfs_truncate(const struct path *path, loff_t length)
 {
        struct inode *inode;
-       struct dentry *upperdentry;
        long error;
 
        inode = path->dentry->d_inode;
@@ -91,17 +90,7 @@ long vfs_truncate(const struct path *path, loff_t length)
        if (IS_APPEND(inode))
                goto mnt_drop_write_and_out;
 
-       /*
-        * If this is an overlayfs then do as if opening the file so we get
-        * write access on the upper inode, not on the overlay inode.  For
-        * non-overlay filesystems d_real() is an identity function.
-        */
-       upperdentry = d_real(path->dentry, NULL, O_WRONLY);
-       error = PTR_ERR(upperdentry);
-       if (IS_ERR(upperdentry))
-               goto mnt_drop_write_and_out;
-
-       error = get_write_access(upperdentry->d_inode);
+       error = get_write_access(inode);
        if (error)
                goto mnt_drop_write_and_out;
 
@@ -120,7 +109,7 @@ long vfs_truncate(const struct path *path, loff_t length)
                error = do_truncate(path->dentry, length, 0, NULL);
 
 put_write_and_out:
-       put_write_access(upperdentry->d_inode);
+       put_write_access(inode);
 mnt_drop_write_and_out:
        mnt_drop_write(path->mnt);
 out: