diff options
Diffstat (limited to 'drivers/md/md.h')
| -rw-r--r-- | drivers/md/md.h | 71 |
1 files changed, 39 insertions, 32 deletions
diff --git a/drivers/md/md.h b/drivers/md/md.h index 9bcb77bca963..ade83af123a2 100644 --- a/drivers/md/md.h +++ b/drivers/md/md.h @@ -59,6 +59,7 @@ struct md_rdev { */ struct block_device *meta_bdev; struct block_device *bdev; /* block device handle */ + struct bdev_handle *bdev_handle; /* Handle from open for bdev */ struct page *sb_page, *bb_page; int sb_loaded; @@ -245,10 +246,6 @@ struct md_cluster_info; * become failed. * @MD_HAS_PPL: The raid array has PPL feature set. * @MD_HAS_MULTIPLE_PPLS: The raid array has multiple PPLs feature set. - * @MD_ALLOW_SB_UPDATE: md_check_recovery is allowed to update the metadata - * without taking reconfig_mutex. - * @MD_UPDATING_SB: md_check_recovery is updating the metadata without - * explicitly holding reconfig_mutex. * @MD_NOT_READY: do_md_run() is active, so 'array_state', ust not report that * array is ready yet. * @MD_BROKEN: This is used to stop writes and mark array as failed. @@ -265,8 +262,6 @@ enum mddev_flags { MD_FAILFAST_SUPPORTED, MD_HAS_PPL, MD_HAS_MULTIPLE_PPLS, - MD_ALLOW_SB_UPDATE, - MD_UPDATING_SB, MD_NOT_READY, MD_BROKEN, MD_DELETED, @@ -313,6 +308,7 @@ struct mddev { unsigned long sb_flags; int suspended; + struct mutex suspend_mutex; struct percpu_ref active_io; int ro; int sysfs_active; /* set when sysfs deletes @@ -450,7 +446,10 @@ struct mddev { struct kernfs_node *sysfs_degraded; /*handle for 'degraded' */ struct kernfs_node *sysfs_level; /*handle for 'level' */ - struct work_struct del_work; /* used for delayed sysfs removal */ + /* used for delayed sysfs removal */ + struct work_struct del_work; + /* used for register new sync thread */ + struct work_struct sync_work; /* "lock" protects: * flush_bio transition from NULL to !NULL @@ -564,23 +563,6 @@ enum recovery_flags { MD_RESYNCING_REMOTE, /* remote node is running resync thread */ }; -enum md_ro_state { - MD_RDWR, - MD_RDONLY, - MD_AUTO_READ, - MD_MAX_STATE -}; - -static inline bool md_is_rdwr(struct mddev *mddev) -{ - return (mddev->ro == MD_RDWR); -} - -static inline bool is_md_suspended(struct mddev *mddev) -{ - return percpu_ref_is_dying(&mddev->active_io); -} - static inline int __must_check mddev_lock(struct mddev *mddev) { return mutex_lock_interruptible(&mddev->reconfig_mutex); @@ -640,7 +622,6 @@ struct md_personality int (*start_reshape) (struct mddev *mddev); void (*finish_reshape) (struct mddev *mddev); void (*update_reshape_pos) (struct mddev *mddev); - void (*prepare_suspend) (struct mddev *mddev); /* quiesce suspends or resumes internal processing. * 1 - stop new actions and wait for action io to complete * 0 - return to normal behaviour @@ -765,7 +746,6 @@ extern void md_unregister_thread(struct mddev *mddev, struct md_thread __rcu **t extern void md_wakeup_thread(struct md_thread __rcu *thread); extern void md_check_recovery(struct mddev *mddev); extern void md_reap_sync_thread(struct mddev *mddev); -extern int mddev_init_writes_pending(struct mddev *mddev); extern bool md_write_start(struct mddev *mddev, struct bio *bi); extern void md_write_inc(struct mddev *mddev, struct bio *bi); extern void md_write_end(struct mddev *mddev); @@ -792,7 +772,8 @@ extern int md_integrity_register(struct mddev *mddev); extern int md_integrity_add_rdev(struct md_rdev *rdev, struct mddev *mddev); extern int strict_strtoul_scaled(const char *cp, unsigned long *res, int scale); -extern void mddev_init(struct mddev *mddev); +extern int mddev_init(struct mddev *mddev); +extern void mddev_destroy(struct mddev *mddev); struct mddev *md_alloc(dev_t dev, char *name); void mddev_put(struct mddev *mddev); extern int md_run(struct mddev *mddev); @@ -803,15 +784,14 @@ extern int md_rdev_init(struct md_rdev *rdev); extern void md_rdev_clear(struct md_rdev *rdev); extern void md_handle_request(struct mddev *mddev, struct bio *bio); -extern void mddev_suspend(struct mddev *mddev); +extern int mddev_suspend(struct mddev *mddev, bool interruptible); extern void mddev_resume(struct mddev *mddev); extern void md_reload_sb(struct mddev *mddev, int raid_disk); extern void md_update_sb(struct mddev *mddev, int force); -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); +extern void mddev_create_serial_pool(struct mddev *mddev, struct md_rdev *rdev); +extern void mddev_destroy_serial_pool(struct mddev *mddev, + struct md_rdev *rdev); 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); @@ -849,6 +829,33 @@ static inline void mddev_check_write_zeroes(struct mddev *mddev, struct bio *bio mddev->queue->limits.max_write_zeroes_sectors = 0; } +static inline int mddev_suspend_and_lock(struct mddev *mddev) +{ + int ret; + + ret = mddev_suspend(mddev, true); + if (ret) + return ret; + + ret = mddev_lock(mddev); + if (ret) + mddev_resume(mddev); + + return ret; +} + +static inline void mddev_suspend_and_lock_nointr(struct mddev *mddev) +{ + mddev_suspend(mddev, false); + mutex_lock(&mddev->reconfig_mutex); +} + +static inline void mddev_unlock_and_resume(struct mddev *mddev) +{ + mddev_unlock(mddev); + mddev_resume(mddev); +} + struct mdu_array_info_s; struct mdu_disk_info_s; |