From 46c4e71e9b02a649c722f06569f5b6575da02dba Mon Sep 17 00:00:00 2001 From: Filipe Manana Date: Tue, 24 Jun 2014 17:48:28 +0100 Subject: [PATCH] Btrfs: assert send doesn't attempt to start transactions When starting a transaction just assert that current->journal_info doesn't contain a send transaction stub, since send isn't supposed to start transactions and when it finishes (either successfully or not) it's supposed to set current->journal_info to NULL. This is motivated by the change titled: Btrfs: fix crash when starting transaction Signed-off-by: Filipe David Borba Manana Signed-off-by: Chris Mason --- fs/btrfs/transaction.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c index 511839c04f11..a32ad65b6cdc 100644 --- a/fs/btrfs/transaction.c +++ b/fs/btrfs/transaction.c @@ -386,11 +386,13 @@ start_transaction(struct btrfs_root *root, u64 num_items, unsigned int type, bool reloc_reserved = false; int ret; + /* Send isn't supposed to start transactions. */ + ASSERT(current->journal_info != (void *)BTRFS_SEND_TRANS_STUB); + if (test_bit(BTRFS_FS_STATE_ERROR, &root->fs_info->fs_state)) return ERR_PTR(-EROFS); - if (current->journal_info && - current->journal_info != (void *)BTRFS_SEND_TRANS_STUB) { + if (current->journal_info) { WARN_ON(type & TRANS_EXTWRITERS); h = current->journal_info; h->use_count++;