[PATCH 2/4] btrfs: make open_ctree error injectable

[Josef Bacik]

From: Josef Bacik <jbacik@xxxxxx>

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

Signed-off-by: Josef Bacik <jbacik@xxxxxx>
---
 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