Commit 7e775f46 authored Jan 23, 2014 by Dmitry Monakhov Committed by Linus Torvalds Jan 23, 2014

fs/pipe.c: skip file_update_time on frozen fs

Pipe has no data associated with fs so it is not good idea to block
pipe_write() if FS is frozen, but we can not update file's time on such
filesystem.  Let's use same idea as we use in touch_time().

Addresses https://bugzilla.kernel.org/show_bug.cgi?id=65701



Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Reviewed-by: Jan Kara <jack@suse.cz>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent d643a49a

fs/pipe.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -663,10 +663,11 @@ pipe_write(struct kiocb iocb, const struct iovec _iov,
		wake_up_interruptible_sync_poll(&pipe->wait, POLLIN \| POLLRDNORM);
		kill_fasync(&pipe->fasync_readers, SIGIO, POLL_IN);
		}
		if (ret > 0) {
		if (ret > 0 && sb_start_write_trylock(file_inode(filp)->i_sb)) {
		int err = file_update_time(filp);
		if (err)
		ret = err;
		sb_end_write(file_inode(filp)->i_sb);
		}
		return ret;
		}