diff options
Diffstat (limited to 'drivers/md/md.h')
| -rw-r--r-- | drivers/md/md.h | 26 |
1 files changed, 17 insertions, 9 deletions
diff --git a/drivers/md/md.h b/drivers/md/md.h index f51a3afaee1b..acd681939112 100644 --- a/drivers/md/md.h +++ b/drivers/md/md.h @@ -32,6 +32,16 @@ * be retried. */ #define MD_FAILFAST (REQ_FAILFAST_DEV | REQ_FAILFAST_TRANSPORT) + +/* + * The struct embedded in rdev is used to serialize IO. + */ +struct serial_in_rdev { + struct rb_root_cached serial_rb; + spinlock_t serial_lock; + wait_queue_head_t serial_io_wait; +}; + /* * MD's 'extended' device */ @@ -110,12 +120,7 @@ struct md_rdev { * in superblock. */ - /* - * The members for check collision of write IOs. - */ - struct list_head serial_list; - spinlock_t serial_list_lock; - wait_queue_head_t serial_io_wait; + struct serial_in_rdev *serial; /* used for raid1 io serialization */ struct work_struct del_work; /* used for delayed sysfs removal */ @@ -266,9 +271,10 @@ enum mddev_sb_flags { #define NR_SERIAL_INFOS 8 /* record current range of serialize IOs */ struct serial_info { - sector_t lo; - sector_t hi; - struct list_head list; + struct rb_node node; + sector_t start; /* start sector of rb node */ + sector_t last; /* end sector of rb node */ + sector_t _subtree_last; /* highest sector in subtree of rb node */ }; struct mddev { @@ -740,6 +746,8 @@ 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_serial_pool(struct mddev *mddev, struct md_rdev *rdev, bool is_suspend); +extern void mddev_destroy_serial_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); |