diff options
Diffstat (limited to 'drivers/md/md.h')
| -rw-r--r-- | drivers/md/md.h | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/drivers/md/md.h b/drivers/md/md.h index 7c930c0911932..10f98200e2f8a 100644 --- a/drivers/md/md.h +++ b/drivers/md/md.h @@ -109,6 +109,14 @@ struct md_rdev { * for reporting to userspace and storing * in superblock. */ + + /* + * The members for check collision of write behind IOs. + */ + struct list_head wb_list; + spinlock_t wb_list_lock; + wait_queue_head_t wb_io_wait; + struct work_struct del_work; /* used for delayed sysfs removal */ struct kernfs_node *sysfs_state; /* handle for 'state' @@ -193,6 +201,10 @@ enum flag_bits { * it didn't fail, so don't use FailFast * any more for metadata */ + WBCollisionCheck, /* + * multiqueue device should check if there + * is collision between write behind bios. + */ }; static inline int is_badblock(struct md_rdev *rdev, sector_t s, int sectors, @@ -245,6 +257,14 @@ enum mddev_sb_flags { MD_SB_NEED_REWRITE, /* metadata write needs to be repeated */ }; +#define NR_WB_INFOS 8 +/* record current range of write behind IOs */ +struct wb_info { + sector_t lo; + sector_t hi; + struct list_head list; +}; + struct mddev { void *private; struct md_personality *pers; @@ -461,6 +481,7 @@ struct mddev { */ struct work_struct flush_work; struct work_struct event_work; /* used by dm to report failure event */ + mempool_t *wb_info_pool; void (*sync_super)(struct mddev *mddev, struct md_rdev *rdev); struct md_cluster_info *cluster_info; unsigned int good_device_nr; /* good device num within cluster raid */ @@ -709,6 +730,8 @@ extern struct bio *bio_alloc_mddev(gfp_t gfp_mask, int nr_iovecs, extern void md_reload_sb(struct mddev *mddev, int raid_disk); extern void md_update_sb(struct mddev *mddev, int force); extern void md_kick_rdev_from_array(struct md_rdev * rdev); +extern void mddev_create_wb_pool(struct mddev *mddev, struct md_rdev *rdev, + bool is_suspend); struct md_rdev *md_find_rdev_nr_rcu(struct mddev *mddev, int nr); struct md_rdev *md_find_rdev_rcu(struct mddev *mddev, dev_t dev); |