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-rw-r--r--include/linux/raid/md.h1
-rw-r--r--include/linux/raid/md_k.h8
-rw-r--r--include/linux/raid/raid1.h4
3 files changed, 12 insertions, 1 deletions
diff --git a/include/linux/raid/md.h b/include/linux/raid/md.h
index 91467a3c4a52..13e7c4b62367 100644
--- a/include/linux/raid/md.h
+++ b/include/linux/raid/md.h
@@ -89,6 +89,7 @@ extern void md_print_devices (void);
extern void md_super_write(mddev_t *mddev, mdk_rdev_t *rdev,
sector_t sector, int size, struct page *page);
+extern void md_super_wait(mddev_t *mddev);
extern int sync_page_io(struct block_device *bdev, sector_t sector, int size,
struct page *page, int rw);
diff --git a/include/linux/raid/md_k.h b/include/linux/raid/md_k.h
index 11629f92180a..d5854c2b2721 100644
--- a/include/linux/raid/md_k.h
+++ b/include/linux/raid/md_k.h
@@ -122,6 +122,7 @@ struct mdk_rdev_s
#define Faulty 1 /* device is known to have a fault */
#define In_sync 2 /* device is in_sync with rest of array */
#define WriteMostly 4 /* Avoid reading if at all possible */
+#define BarriersNotsupp 5 /* BIO_RW_BARRIER is not supported */
int desc_nr; /* descriptor index in the superblock */
int raid_disk; /* role of device in array */
@@ -210,6 +211,13 @@ struct mddev_s
int degraded; /* whether md should consider
* adding a spare
*/
+ int barriers_work; /* initialised to true, cleared as soon
+ * as a barrier request to slave
+ * fails. Only supported
+ */
+ struct bio *biolist; /* bios that need to be retried
+ * because BIO_RW_BARRIER is not supported
+ */
atomic_t recovery_active; /* blocks scheduled, but not written */
wait_queue_head_t recovery_wait;
diff --git a/include/linux/raid/raid1.h b/include/linux/raid/raid1.h
index 60e19b667548..292b98f2b408 100644
--- a/include/linux/raid/raid1.h
+++ b/include/linux/raid/raid1.h
@@ -110,7 +110,9 @@ struct r1bio_s {
#define R1BIO_Uptodate 0
#define R1BIO_IsSync 1
#define R1BIO_Degraded 2
-#define R1BIO_BehindIO 3
+#define R1BIO_BehindIO 3
+#define R1BIO_Barrier 4
+#define R1BIO_BarrierRetry 5
/* For write-behind requests, we call bi_end_io when
* the last non-write-behind device completes, providing
* any write was successful. Otherwise we call when