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Diffstat (limited to 'drivers/md/raid5.h')
-rw-r--r--drivers/md/raid5.h59
1 files changed, 50 insertions, 9 deletions
diff --git a/drivers/md/raid5.h b/drivers/md/raid5.h
index 983e18a83db1..7dc0dd86074b 100644
--- a/drivers/md/raid5.h
+++ b/drivers/md/raid5.h
@@ -210,11 +210,19 @@ struct stripe_head {
atomic_t count; /* nr of active thread/requests */
int bm_seq; /* sequence number for bitmap flushes */
int disks; /* disks in stripe */
+ int overwrite_disks; /* total overwrite disks in stripe,
+ * this is only checked when stripe
+ * has STRIPE_BATCH_READY
+ */
enum check_states check_state;
enum reconstruct_states reconstruct_state;
spinlock_t stripe_lock;
int cpu;
struct r5worker_group *group;
+
+ struct stripe_head *batch_head; /* protected by stripe lock */
+ spinlock_t batch_lock; /* only header's lock is useful */
+ struct list_head batch_list; /* protected by head's batch lock*/
/**
* struct stripe_operations
* @target - STRIPE_OP_COMPUTE_BLK target
@@ -327,8 +335,15 @@ enum {
STRIPE_ON_UNPLUG_LIST,
STRIPE_DISCARD,
STRIPE_ON_RELEASE_LIST,
+ STRIPE_BATCH_READY,
+ STRIPE_BATCH_ERR,
};
+#define STRIPE_EXPAND_SYNC_FLAG \
+ ((1 << STRIPE_EXPAND_SOURCE) |\
+ (1 << STRIPE_EXPAND_READY) |\
+ (1 << STRIPE_EXPANDING) |\
+ (1 << STRIPE_SYNC_REQUESTED))
/*
* Operation request flags
*/
@@ -340,6 +355,24 @@ enum {
STRIPE_OP_RECONSTRUCT,
STRIPE_OP_CHECK,
};
+
+/*
+ * RAID parity calculation preferences
+ */
+enum {
+ PARITY_DISABLE_RMW = 0,
+ PARITY_ENABLE_RMW,
+ PARITY_PREFER_RMW,
+};
+
+/*
+ * Pages requested from set_syndrome_sources()
+ */
+enum {
+ SYNDROME_SRC_ALL,
+ SYNDROME_SRC_WANT_DRAIN,
+ SYNDROME_SRC_WRITTEN,
+};
/*
* Plugging:
*
@@ -396,10 +429,11 @@ struct r5conf {
spinlock_t hash_locks[NR_STRIPE_HASH_LOCKS];
struct mddev *mddev;
int chunk_sectors;
- int level, algorithm;
+ int level, algorithm, rmw_level;
int max_degraded;
int raid_disks;
int max_nr_stripes;
+ int min_nr_stripes;
/* reshape_progress is the leading edge of a 'reshape'
* It has value MaxSector when no reshape is happening
@@ -458,15 +492,11 @@ struct r5conf {
/* per cpu variables */
struct raid5_percpu {
struct page *spare_page; /* Used when checking P/Q in raid6 */
- void *scribble; /* space for constructing buffer
+ struct flex_array *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
@@ -480,9 +510,19 @@ struct r5conf {
struct llist_head released_stripes;
wait_queue_head_t wait_for_stripe;
wait_queue_head_t wait_for_overlap;
- int inactive_blocked; /* release of inactive stripes blocked,
- * waiting for 25% to be free
- */
+ unsigned long cache_state;
+#define R5_INACTIVE_BLOCKED 1 /* release of inactive stripes blocked,
+ * waiting for 25% to be free
+ */
+#define R5_ALLOC_MORE 2 /* It might help to allocate another
+ * stripe.
+ */
+#define R5_DID_ALLOC 4 /* A stripe was allocated, don't allocate
+ * more until at least one has been
+ * released. This avoids flooding
+ * the cache.
+ */
+ struct shrinker shrinker;
int pool_size; /* number of disks in stripeheads in pool */
spinlock_t device_lock;
struct disk_info *disks;
@@ -497,6 +537,7 @@ struct r5conf {
int worker_cnt_per_group;
};
+
/*
* Our supported algorithms
*/