diff options
Diffstat (limited to 'drivers/md/md.h')
| -rw-r--r-- | drivers/md/md.h | 25 |
1 files changed, 21 insertions, 4 deletions
diff --git a/drivers/md/md.h b/drivers/md/md.h index ab339571e..ca0b643fe 100644 --- a/drivers/md/md.h +++ b/drivers/md/md.h @@ -87,10 +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 @@ -172,6 +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) @@ -221,6 +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; @@ -553,7 +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 @@ -563,7 +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); } @@ -658,7 +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); |