diff options
Diffstat (limited to 'include/linux/raid/raid5.h')
| -rw-r--r-- | include/linux/raid/raid5.h | 25 |
1 files changed, 21 insertions, 4 deletions
diff --git a/include/linux/raid/raid5.h b/include/linux/raid/raid5.h index 394da8207b3..914af667044 100644 --- a/include/linux/raid/raid5.h +++ b/include/linux/raid/raid5.h @@ -135,6 +135,7 @@ struct stripe_head { atomic_t count; /* nr of active thread/requests */ spinlock_t lock; int bm_seq; /* sequence number for bitmap flushes */ + int disks; /* disks in stripe */ struct r5dev { struct bio req; struct bio_vec vec; @@ -156,6 +157,7 @@ struct stripe_head { #define R5_ReadError 8 /* seen a read error here recently */ #define R5_ReWrite 9 /* have tried to over-write the readerror */ +#define R5_Expanded 10 /* This block now has post-expand data */ /* * Write method */ @@ -174,7 +176,9 @@ struct stripe_head { #define STRIPE_DELAYED 6 #define STRIPE_DEGRADED 7 #define STRIPE_BIT_DELAY 8 - +#define STRIPE_EXPANDING 9 +#define STRIPE_EXPAND_SOURCE 10 +#define STRIPE_EXPAND_READY 11 /* * Plugging: * @@ -211,12 +215,24 @@ struct raid5_private_data { int raid_disks, working_disks, failed_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 + */ + int previous_raid_disks; + struct list_head handle_list; /* stripes needing handling */ struct list_head delayed_list; /* stripes that have plugged requests */ struct list_head bitmap_list; /* stripes delaying awaiting bitmap update */ atomic_t preread_active_stripes; /* stripes with scheduled io */ - char cache_name[20]; + atomic_t reshape_stripes; /* stripes with pending writes for reshape */ + /* unfortunately we need two cache names as we temporarily have + * two caches. + */ + int active_name; + char cache_name[2][20]; kmem_cache_t *slab_cache; /* for allocating stripes */ int seq_flush, seq_write; @@ -238,9 +254,10 @@ struct raid5_private_data { wait_queue_head_t wait_for_overlap; int inactive_blocked; /* release of inactive stripes blocked, * waiting for 25% to be free - */ + */ + int pool_size; /* number of disks in stripeheads in pool */ spinlock_t device_lock; - struct disk_info disks[0]; + struct disk_info *disks; }; typedef struct raid5_private_data raid5_conf_t; |