Merge tag 'md/4.1-rc4-fixes' of git://neil.brown.name/md

[firefly-linux-kernel-4.4.55.git] / drivers / md / raid5.h

diff --git a/drivers/md/raid5.h b/drivers/md/raid5.h
index ee65ed844d3f32545d1637822acad5d0a744aadf..7dc0dd86074b1702276ccb51ba166a38d5d0f7e3 100644 (file)
--- a/drivers/md/raid5.h
+++ b/drivers/md/raid5.h
@@ -355,6 +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:
  *
@@ -411,10 +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
@@ -491,9 +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;
@@ -508,6 +537,7 @@ struct r5conf {
        int                     worker_cnt_per_group;
 };
 
+
 /*
  * Our supported algorithms
  */