dm: return error if bio_integrity_clone() fails in clone_bio()
clone_bio() now checks if bio_integrity_clone() returned an error rather
than just drop it on the floor.
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 9c9272b..70d5b82a3 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -1567,21 +1567,26 @@
/*
* Creates a bio that consists of range of complete bvecs.
*/
-static void clone_bio(struct dm_target_io *tio, struct bio *bio,
- sector_t sector, unsigned len)
+static int clone_bio(struct dm_target_io *tio, struct bio *bio,
+ sector_t sector, unsigned len)
{
struct bio *clone = &tio->clone;
__bio_clone_fast(clone, bio);
- if (bio_integrity(bio))
- bio_integrity_clone(clone, bio, GFP_NOIO);
+ if (bio_integrity(bio)) {
+ int r = bio_integrity_clone(clone, bio, GFP_NOIO);
+ if (r < 0)
+ return r;
+ }
bio_advance(clone, to_bytes(sector - clone->bi_iter.bi_sector));
clone->bi_iter.bi_size = to_bytes(len);
if (bio_integrity(bio))
bio_integrity_trim(clone, 0, len);
+
+ return 0;
}
static struct dm_target_io *alloc_tio(struct clone_info *ci,
@@ -1638,13 +1643,14 @@
return 0;
}
-static void __clone_and_map_data_bio(struct clone_info *ci, struct dm_target *ti,
+static int __clone_and_map_data_bio(struct clone_info *ci, struct dm_target *ti,
sector_t sector, unsigned *len)
{
struct bio *bio = ci->bio;
struct dm_target_io *tio;
unsigned target_bio_nr;
unsigned num_target_bios = 1;
+ int r = 0;
/*
* Does the target want to receive duplicate copies of the bio?
@@ -1655,9 +1661,13 @@
for (target_bio_nr = 0; target_bio_nr < num_target_bios; target_bio_nr++) {
tio = alloc_tio(ci, ti, target_bio_nr);
tio->len_ptr = len;
- clone_bio(tio, bio, sector, *len);
+ r = clone_bio(tio, bio, sector, *len);
+ if (r < 0)
+ break;
__map_bio(tio);
}
+
+ return r;
}
typedef unsigned (*get_num_bios_fn)(struct dm_target *ti);
@@ -1734,6 +1744,7 @@
struct bio *bio = ci->bio;
struct dm_target *ti;
unsigned len;
+ int r;
if (unlikely(bio->bi_rw & REQ_DISCARD))
return __send_discard(ci);
@@ -1746,7 +1757,9 @@
len = min_t(sector_t, max_io_len(ci->sector, ti), ci->sector_count);
- __clone_and_map_data_bio(ci, ti, ci->sector, &len);
+ r = __clone_and_map_data_bio(ci, ti, ci->sector, &len);
+ if (r < 0)
+ return r;
ci->sector += len;
ci->sector_count -= len;