btrfs: fix the error handling for submit_extent_page() for btrfs_do_readpage()

[mirror_ubuntu-jammy-kernel.git] / fs / namespace.c

diff --git a/fs/namespace.c b/fs/namespace.c
index 659a8f39c61afbf1477ddc207f117894684f1ba3..d3d75063561042f7643a9405b65e444e3d84d20c 100644 (file)
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -439,6 +439,7 @@ void __mnt_drop_write(struct vfsmount *mnt)
        mnt_dec_writers(real_mount(mnt));
        preempt_enable();
 }
+EXPORT_SYMBOL_GPL(__mnt_drop_write);
 
 /**
  * mnt_drop_write - give up write access to a mount
@@ -808,6 +809,13 @@ static inline int check_mnt(struct mount *mnt)
        return mnt->mnt_ns == current->nsproxy->mnt_ns;
 }
 
+/* for aufs, CONFIG_AUFS_BR_FUSE */
+int is_current_mnt_ns(struct vfsmount *mnt)
+{
+       return check_mnt(real_mount(mnt));
+}
+EXPORT_SYMBOL_GPL(is_current_mnt_ns);
+
 /*
  * vfsmount lock must be held for write
  */
@@ -2005,6 +2013,7 @@ int iterate_mounts(int (*f)(struct vfsmount *, void *), void *arg,
        }
        return 0;
 }
+EXPORT_SYMBOL_GPL(iterate_mounts);
 
 static void lock_mnt_tree(struct mount *mnt)
 {
@@ -4263,12 +4272,11 @@ SYSCALL_DEFINE5(mount_setattr, int, dfd, const char __user *, path,
                return err;
 
        err = user_path_at(dfd, path, kattr.lookup_flags, &target);
-       if (err)
-               return err;
-
-       err = do_mount_setattr(&target, &kattr);
+       if (!err) {
+               err = do_mount_setattr(&target, &kattr);
+               path_put(&target);
+       }
        finish_mount_kattr(&kattr);
-       path_put(&target);
        return err;
 }