btrfs: make open_ctree error injectable

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

Signed-off-by: Josef Bacik <jbacik@fb.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 10a2a579cc7f6a3569212444fb37dd5ddcf0c0c7..02b5f5667754ef3ef81977ebdaa503852d2c4a30 100644 (file)
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -30,6 +30,7 @@
 #include <linux/ratelimit.h>
 #include <linux/uuid.h>
 #include <linux/semaphore.h>
+#include <linux/bpf.h>
 #include <asm/unaligned.h>
 #include "ctree.h"
 #include "disk-io.h"
@@ -3123,6 +3124,7 @@ recovery_tree_root:
                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)
 {