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-rw-r--r--include/linux/raid/raid1.h13
1 files changed, 13 insertions, 0 deletions
diff --git a/include/linux/raid/raid1.h b/include/linux/raid/raid1.h
index 9d93cf12e890..60e19b667548 100644
--- a/include/linux/raid/raid1.h
+++ b/include/linux/raid/raid1.h
@@ -80,6 +80,9 @@ struct r1bio_s {
atomic_t remaining; /* 'have we finished' count,
* used from IRQ handlers
*/
+ atomic_t behind_remaining; /* number of write-behind ios remaining
+ * in this BehindIO request
+ */
sector_t sector;
int sectors;
unsigned long state;
@@ -107,4 +110,14 @@ struct r1bio_s {
#define R1BIO_Uptodate 0
#define R1BIO_IsSync 1
#define R1BIO_Degraded 2
+#define R1BIO_BehindIO 3
+/* 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
+ * any write-behind write succeeds, otherwise we call
+ * with failure when last write completes (and all failed).
+ * Record that bi_end_io was called with this flag...
+ */
+#define R1BIO_Returned 4
+
#endif
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