>>From b8597fdc23f8f6e26a531e9a7da3c5fe7b99752c Mon Sep 17 00:00:00 2001
From: Dmitry Monakhov <dmonakhov@openvz.org>
Date: Tue, 17 Dec 2013 10:45:35 +1100
Subject: [PATCH] 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>
---
fs/pipe.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/fs/pipe.c b/fs/pipe.c
index 0e0752e..78fd0d0 100644
--- a/fs/pipe.c
+++ b/fs/pipe.c
@@ -663,10 +663,11 @@ out:
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;
}
--
1.8.5.2