diff options
Diffstat (limited to 'kernel/drivers/md/md.h')
| -rw-r--r-- | kernel/drivers/md/md.h | 40 |
1 files changed, 23 insertions, 17 deletions
diff --git a/kernel/drivers/md/md.h b/kernel/drivers/md/md.h index 4046a6c6f..dfa57b415 100644 --- a/kernel/drivers/md/md.h +++ b/kernel/drivers/md/md.h @@ -16,6 +16,7 @@ #define _MD_MD_H #include <linux/blkdev.h> +#include <linux/backing-dev.h> #include <linux/kobject.h> #include <linux/list.h> #include <linux/mm.h> @@ -86,10 +87,16 @@ struct md_rdev { * array and could again if we did a partial * resync from the bitmap */ - sector_t recovery_offset;/* If this device has been partially + union { + sector_t recovery_offset;/* If this device has been partially * recovered, this is where we were * up to. */ + sector_t journal_tail; /* If this device is a journal device, + * this is the journal tail (journal + * recovery start point) + */ + }; atomic_t nr_pending; /* number of pending requests. * only maintained for arrays that @@ -133,10 +140,6 @@ enum flag_bits { Bitmap_sync, /* ..actually, not quite In_sync. Need a * bitmap-based recovery to get fully in sync */ - Unmerged, /* device is being added to array and should - * be considerred for bvec_merge_fn but not - * yet for actual IO - */ WriteMostly, /* Avoid reading if at all possible */ AutoDetected, /* added by auto-detect */ Blocked, /* An error occurred but has not yet @@ -175,6 +178,11 @@ enum flag_bits { * This device is seen locally but not * by the whole cluster */ + Journal, /* This device is used as journal for + * raid-5/6. + * Usually, this device should be faster + * than other devices in the array + */ }; #define BB_LEN_MASK (0x00000000000001FFULL) @@ -224,6 +232,8 @@ struct mddev { #define MD_STILL_CLOSED 4 /* If set, then array has not been opened since * md_ioctl checked on it. */ +#define MD_JOURNAL_CLEAN 5 /* A raid with journal is already clean */ +#define MD_HAS_JOURNAL 6 /* The raid array has journal feature set */ int suspended; atomic_t active_io; @@ -373,10 +383,6 @@ struct mddev { int degraded; /* whether md should consider * adding a spare */ - int merge_check_needed; /* at least one - * member device - * has a - * merge_bvec_fn */ atomic_t recovery_active; /* blocks scheduled, but not written */ wait_queue_head_t recovery_wait; @@ -531,10 +537,6 @@ struct md_personality /* congested implements bdi.congested_fn(). * Will not be called while array is 'suspended' */ int (*congested)(struct mddev *mddev, int bits); - /* mergeable_bvec is use to implement ->merge_bvec_fn */ - int (*mergeable_bvec)(struct mddev *mddev, - struct bvec_merge_data *bvm, - struct bio_vec *biovec); }; struct md_sysfs_entry { @@ -564,7 +566,9 @@ static inline char * mdname (struct mddev * mddev) static inline int sysfs_link_rdev(struct mddev *mddev, struct md_rdev *rdev) { char nm[20]; - if (!test_bit(Replacement, &rdev->flags) && mddev->kobj.sd) { + if (!test_bit(Replacement, &rdev->flags) && + !test_bit(Journal, &rdev->flags) && + mddev->kobj.sd) { sprintf(nm, "rd%d", rdev->raid_disk); return sysfs_create_link(&mddev->kobj, &rdev->kobj, nm); } else @@ -574,7 +578,9 @@ static inline int sysfs_link_rdev(struct mddev *mddev, struct md_rdev *rdev) static inline void sysfs_unlink_rdev(struct mddev *mddev, struct md_rdev *rdev) { char nm[20]; - if (!test_bit(Replacement, &rdev->flags) && mddev->kobj.sd) { + if (!test_bit(Replacement, &rdev->flags) && + !test_bit(Journal, &rdev->flags) && + mddev->kobj.sd) { sprintf(nm, "rd%d", rdev->raid_disk); sysfs_remove_link(&mddev->kobj, nm); } @@ -651,7 +657,7 @@ extern void md_wait_for_blocked_rdev(struct md_rdev *rdev, struct mddev *mddev); extern void md_set_array_sectors(struct mddev *mddev, sector_t array_sectors); extern int md_check_no_bitmap(struct mddev *mddev); extern int md_integrity_register(struct mddev *mddev); -extern void md_integrity_add_rdev(struct md_rdev *rdev, 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); @@ -669,7 +675,7 @@ extern struct bio *bio_alloc_mddev(gfp_t gfp_mask, int nr_iovecs, struct mddev *mddev); extern void md_unplug(struct blk_plug_cb *cb, bool from_schedule); -extern void md_reload_sb(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 md_kick_rdev_from_array(struct md_rdev * rdev); struct md_rdev *md_find_rdev_nr_rcu(struct mddev *mddev, int nr); |