1 files changed, 40 insertions, 0 deletions

diff --git a/block/ll_rw_blk.c b/block/ll_rw_blk.c
index 31512cd9f3ad..4f83fd922377 100644
--- a/block/ll_rw_blk.c
+++ b/block/ll_rw_blk.c
@@ -28,6 +28,7 @@
 #include <linux/interrupt.h>
 #include <linux/cpu.h>
 #include <linux/blktrace_api.h>
+#include <linux/fault-inject.h>
 
 /*
  * for max sense size
@@ -3056,6 +3057,42 @@ static void handle_bad_sector(struct bio *bio)
         set_bit(BIO_EOF, &bio->bi_flags);
 }
 
+#ifdef CONFIG_FAIL_MAKE_REQUEST
+
+static DECLARE_FAULT_ATTR(fail_make_request);
+
+static int __init setup_fail_make_request(char *str)
+{
+        return setup_fault_attr(&fail_make_request, str);
+}
+__setup("fail_make_request=", setup_fail_make_request);
+
+static int should_fail_request(struct bio *bio)
+{
+        if ((bio->bi_bdev->bd_disk->flags & GENHD_FL_FAIL) ||
+            (bio->bi_bdev->bd_part && bio->bi_bdev->bd_part->make_it_fail))
+                return should_fail(&fail_make_request, bio->bi_size);
+
+        return 0;
+}
+
+static int __init fail_make_request_debugfs(void)
+{
+        return init_fault_attr_dentries(&fail_make_request,
+                                        "fail_make_request");
+}
+
+late_initcall(fail_make_request_debugfs);
+
+#else /* CONFIG_FAIL_MAKE_REQUEST */
+
+static inline int should_fail_request(struct bio *bio)
+{
+        return 0;
+}
+
+#endif /* CONFIG_FAIL_MAKE_REQUEST */
+
 /**
  * generic_make_request: hand a buffer to its device driver for I/O
  * @bio:  The bio describing the location in memory and on the device.
@@ -3141,6 +3178,9 @@ end_io:
                 if (unlikely(test_bit(QUEUE_FLAG_DEAD, &q->queue_flags)))
                         goto end_io;
 
+                if (should_fail_request(bio))
+                        goto end_io;
+
                 /*
                  * If this device has partitions, remap block n
                  * of partition p to block n+start(p) of the disk.