From: Qu Wenruo Date: Tue, 10 Dec 2024 04:53:06 +0000 (+1030) Subject: btrfs: output the reason for open_ctree() failure X-Git-Tag: v6.14-rc1~207^2~104 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d0f038104fa37380e2a725e669508e43d0c503e9;p=thirdparty%2Fkernel%2Flinux.git btrfs: output the reason for open_ctree() failure There is a recent ML report that mounting a large fs backed by hardware RAID56 controller (with one device missing) took too much time, and systemd seems to kill the mount attempt. In that case, the only error message is: BTRFS error (device sdj): open_ctree failed There is no reason on why the failure happened, making it very hard to understand the reason. At least output the error number (in the particular case it should be -EINTR) to provide some clue. Link: https://lore.kernel.org/linux-btrfs/9b9c4d2810abcca2f9f76e32220ed9a90febb235.camel@scientia.org/ Reported-by: Christoph Anton Mitterer Cc: stable@vger.kernel.org Reviewed-by: Filipe Manana Signed-off-by: Qu Wenruo Reviewed-by: David Sterba Signed-off-by: David Sterba --- diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index 7dfe5005129a1..f6eaaf20229d8 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -971,7 +971,7 @@ static int btrfs_fill_super(struct super_block *sb, err = open_ctree(sb, fs_devices); if (err) { - btrfs_err(fs_info, "open_ctree failed"); + btrfs_err(fs_info, "open_ctree failed: %d", err); return err; }