[PATCH v7 5/5] btrfs: allow us to inject errors at io_ctl_init

From: Josef Bacik
Date: Wed Nov 22 2017 - 16:25:55 EST


From: Josef Bacik <jbacik@xxxxxx>

This was instrumental in reproducing a space cache bug.

Signed-off-by: Josef Bacik <jbacik@xxxxxx>
Acked-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
fs/btrfs/free-space-cache.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c
index cdc9f4015ec3..daa98dc1f844 100644
--- a/fs/btrfs/free-space-cache.c
+++ b/fs/btrfs/free-space-cache.c
@@ -22,6 +22,7 @@
#include <linux/slab.h>
#include <linux/math64.h>
#include <linux/ratelimit.h>
+#include <linux/bpf.h>
#include "ctree.h"
#include "free-space-cache.h"
#include "transaction.h"
@@ -332,6 +333,7 @@ static int io_ctl_init(struct btrfs_io_ctl *io_ctl, struct inode *inode,

return 0;
}
+BPF_ALLOW_ERROR_INJECTION(io_ctl_init);

static void io_ctl_free(struct btrfs_io_ctl *io_ctl)
{
--
2.7.5