#define _RAID5_H
#include <linux/raid/xor.h>
+#include <linux/dmaengine.h>
/*
*
*/
enum check_states {
check_state_idle = 0,
- check_state_run, /* parity check */
+ check_state_run, /* xor parity check */
+ check_state_run_q, /* q-parity check */
+ check_state_run_pq, /* pq dual parity check */
check_state_check_result,
check_state_compute_run, /* parity repair */
check_state_compute_result,
struct hlist_node hash;
struct list_head lru; /* inactive_list or handle_list */
struct raid5_private_data *raid_conf;
+ short generation; /* increments with every
+ * reshape */
sector_t sector; /* sector of this row */
short pd_idx; /* parity disk index */
short qd_idx; /* 'Q' disk index for raid6 */
int disks; /* disks in stripe */
enum check_states check_state;
enum reconstruct_states reconstruct_state;
- /* stripe_operations
+ /**
+ * struct stripe_operations
* @target - STRIPE_OP_COMPUTE_BLK target
+ * @target2 - 2nd compute target in the raid6 case
+ * @zero_sum_result - P and Q verification flags
+ * @request - async service request flags for raid_run_ops
*/
struct stripe_operations {
- int target;
- u32 zero_sum_result;
+ int target, target2;
+ enum sum_check_flags zero_sum_result;
+ #ifdef CONFIG_MULTICORE_RAID456
+ unsigned long request;
+ wait_queue_head_t wait_for_ops;
+ #endif
} ops;
struct r5dev {
struct bio req;
#define STRIPE_FULL_WRITE 13 /* all blocks are set to be overwritten */
#define STRIPE_BIOFILL_RUN 14
#define STRIPE_COMPUTE_RUN 15
+#define STRIPE_OPS_REQ_PENDING 16
+
/*
* Operation request flags
*/
#define STRIPE_OP_COMPUTE_BLK 1
#define STRIPE_OP_PREXOR 2
#define STRIPE_OP_BIODRAIN 3
-#define STRIPE_OP_POSTXOR 4
+#define STRIPE_OP_RECONSTRUCT 4
#define STRIPE_OP_CHECK 5
/*
struct hlist_head *stripe_hashtbl;
mddev_t *mddev;
struct disk_info *spare;
- int chunk_size, level, algorithm;
+ int chunk_sectors;
+ int level, algorithm;
int max_degraded;
int raid_disks;
int max_nr_stripes;
- /* used during an expand */
- sector_t expand_progress; /* MaxSector when no expand happening */
- sector_t expand_lo; /* from here up to expand_progress it out-of-bounds
- * as we haven't flushed the metadata yet
- */
+ /* reshape_progress is the leading edge of a 'reshape'
+ * It has value MaxSector when no reshape is happening
+ * If delta_disks < 0, it is the last sector we started work on,
+ * else is it the next sector to work on.
+ */
+ sector_t reshape_progress;
+ /* reshape_safe is the trailing edge of a reshape. We know that
+ * before (or after) this address, all reshape has completed.
+ */
+ sector_t reshape_safe;
int previous_raid_disks;
+ int prev_chunk_sectors;
+ int prev_algo;
+ short generation; /* increments with every reshape */
+ unsigned long reshape_checkpoint; /* Time we last updated
+ * metadata */
struct list_head handle_list; /* stripes needing handling */
struct list_head hold_list; /* preread ready stripes */
* (fresh device added).
* Cleared when a sync completes.
*/
-
- struct page *spare_page; /* Used when checking P/Q in raid6 */
+ /* per cpu variables */
+ struct raid5_percpu {
+ struct page *spare_page; /* Used when checking P/Q in raid6 */
+ void *scribble; /* space for constructing buffer
+ * lists and performing address
+ * conversions
+ */
+ } __percpu *percpu;
+ size_t scribble_len; /* size of scribble region must be
+ * associated with conf to handle
+ * cpu hotplug while reshaping
+ */
+#ifdef CONFIG_HOTPLUG_CPU
+ struct notifier_block cpu_notify;
+#endif
/*
* Free stripes pool
typedef struct raid5_private_data raid5_conf_t;
-#define mddev_to_conf(mddev) ((raid5_conf_t *) mddev->private)
-
/*
* Our supported algorithms
*/
{
return (layout >= 0 && layout <= 5)
||
- (layout == 8 || layout == 10)
+ (layout >= 8 && layout <= 10)
||
(layout >= 16 && layout <= 20);
}
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