From cf79ffb5b79e8a2b587fbf218809e691bb396c98 Mon Sep 17 00:00:00 2001 From: Josef Bacik Date: Mon, 1 Apr 2013 11:23:58 -0400 Subject: [PATCH] Btrfs: fix infinite loop when we abort on mount Testing my enospc log code I managed to abort a transaction during mount, which put me into an infinite loop. This is because of two things, first we don't reset trans_no_join if we abort during transaction commit, which will force anybody trying to start a transaction to just loop endlessly waiting for it to be set to 0. But this is still just a symptom, the second issue is we don't set the fs state to error during errors on mount. This is because we don't want to do the flip read only thing during mount, but we still really want to set the fs state to an error to keep us from even getting to the trans_no_join check. So fix both of these things, make sure to reset trans_no_join if we abort during a commit, and make sure we set the fs state to error no matter if we're mounting or not. This should keep us from getting into this infinite loop again. Thanks, Signed-off-by: Josef Bacik --- fs/btrfs/super.c | 5 ++--- fs/btrfs/transaction.c | 4 ++++ 2 files changed, 6 insertions(+), 3 deletions(-) diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index c3254c9..88f812e 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -161,10 +161,9 @@ void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function, } /* Don't go through full error handling during mount */ - if (sb->s_flags & MS_BORN) { - save_error_info(fs_info); + save_error_info(fs_info); + if (sb->s_flags & MS_BORN) btrfs_handle_error(fs_info); - } } static const char * const logtypes[] = { diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c index 9940fd9..a5764ae 100644 --- a/fs/btrfs/transaction.c +++ b/fs/btrfs/transaction.c @@ -1487,6 +1487,10 @@ static void cleanup_transaction(struct btrfs_trans_handle *trans, current->journal_info = NULL; kmem_cache_free(btrfs_trans_handle_cachep, trans); + + spin_lock(&root->fs_info->trans_lock); + root->fs_info->trans_no_join = 0; + spin_unlock(&root->fs_info->trans_lock); } static int btrfs_flush_all_pending_stuffs(struct btrfs_trans_handle *trans, -- 2.7.4