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Diffstat (limited to 'include/linux/raid/raid5.h')
-rw-r--r--include/linux/raid/raid5.h46
1 files changed, 40 insertions, 6 deletions
diff --git a/include/linux/raid/raid5.h b/include/linux/raid/raid5.h
index 1301195abf4..2c96d5fd54b 100644
--- a/include/linux/raid/raid5.h
+++ b/include/linux/raid/raid5.h
@@ -158,6 +158,41 @@
* the compute block completes.
*/
+/*
+ * Operations state - intermediate states that are visible outside of sh->lock
+ * In general _idle indicates nothing is running, _run indicates a data
+ * processing operation is active, and _result means the data processing result
+ * is stable and can be acted upon. For simple operations like biofill and
+ * compute that only have an _idle and _run state they are indicated with
+ * sh->state flags (STRIPE_BIOFILL_RUN and STRIPE_COMPUTE_RUN)
+ */
+/**
+ * enum check_states - handles syncing / repairing a stripe
+ * @check_state_idle - check operations are quiesced
+ * @check_state_run - check operation is running
+ * @check_state_result - set outside lock when check result is valid
+ * @check_state_compute_run - check failed and we are repairing
+ * @check_state_compute_result - set outside lock when compute result is valid
+ */
+enum check_states {
+ check_state_idle = 0,
+ check_state_run, /* parity check */
+ check_state_check_result,
+ check_state_compute_run, /* parity repair */
+ check_state_compute_result,
+};
+
+/**
+ * enum reconstruct_states - handles writing or expanding a stripe
+ */
+enum reconstruct_states {
+ reconstruct_state_idle = 0,
+ reconstruct_state_drain_run, /* write */
+ reconstruct_state_run, /* expand */
+ reconstruct_state_drain_result,
+ reconstruct_state_result,
+};
+
struct stripe_head {
struct hlist_node hash;
struct list_head lru; /* inactive_list or handle_list */
@@ -169,6 +204,7 @@ struct stripe_head {
spinlock_t lock;
int bm_seq; /* sequence number for bitmap flushes */
int disks; /* disks in stripe */
+ enum check_states check_state;
/* stripe_operations
* @pending - pending ops flags (set for request->issue->complete)
* @ack - submitted ops flags (set for issue->complete)
@@ -202,6 +238,7 @@ struct stripe_head_state {
int locked, uptodate, to_read, to_write, failed, written;
int to_fill, compute, req_compute, non_overwrite;
int failed_num;
+ unsigned long ops_request;
};
/* r6_state - extra state data only relevant to r6 */
@@ -254,8 +291,10 @@ struct r6_state {
#define STRIPE_EXPAND_READY 11
#define STRIPE_IO_STARTED 12 /* do not count towards 'bypass_count' */
#define STRIPE_FULL_WRITE 13 /* all blocks are set to be overwritten */
+#define STRIPE_BIOFILL_RUN 14
+#define STRIPE_COMPUTE_RUN 15
/*
- * Operations flags (in issue order)
+ * Operation request flags
*/
#define STRIPE_OP_BIOFILL 0
#define STRIPE_OP_COMPUTE_BLK 1
@@ -264,11 +303,6 @@ struct r6_state {
#define STRIPE_OP_POSTXOR 4
#define STRIPE_OP_CHECK 5
-/* modifiers to the base operations
- * STRIPE_OP_MOD_REPAIR_PD - compute the parity block and write it back
- */
-#define STRIPE_OP_MOD_REPAIR_PD 7
-
/*
* Plugging:
*