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From:   Josef Bacik <josef@toxicpanda.com>
To:     rostedt@goodmis.org, mingo@redhat.com, davem@davemloft.net,
        netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
        ast@kernel.org, kernel-team@fb.com, daniel@iogearbox.net,
        linux-btrfs@vger.kernel.org
Cc:     Josef Bacik <jbacik@fb.com>
Subject: [PATCH 2/4] btrfs: make open_ctree error injectable
Date:   Fri, 17 Nov 2017 13:00:05 -0500
Message-Id: <1510941607-3997-3-git-send-email-josef@toxicpanda.com>
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From: Josef Bacik <jbacik@fb.com>

This allows us to do error injection with BPF for open_ctree.

Signed-off-by: Josef Bacik <jbacik@fb.com>
---
 fs/btrfs/disk-io.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index dfdab849037b..c6b4e1f07072 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -31,6 +31,7 @@
 #include <linux/uuid.h>
 #include <linux/semaphore.h>
 #include <asm/unaligned.h>
+#include <asm/kprobes.h>
 #include "ctree.h"
 #include "disk-io.h"
 #include "hash.h"
@@ -3283,6 +3284,7 @@ int open_ctree(struct super_block *sb,
 		goto fail_block_groups;
 	goto retry_root_backup;
 }
+BPF_ALLOW_ERROR_INJECTION(open_ctree);
 
 static void btrfs_end_buffer_write_sync(struct buffer_head *bh, int uptodate)
 {
-- 
2.7.5


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