/* and dm-bio-list.h is not under include/linux because.... ??? */
#include "../../../drivers/md/dm-bio-list.h"
-#define LEVEL_MULTIPATH (-4)
-#define LEVEL_LINEAR (-1)
-#define LEVEL_FAULTY (-5)
-
-/* we need a value for 'no level specified' and 0
- * means 'raid0', so we need something else. This is
- * for internal use only
- */
-#define LEVEL_NONE (-1000000)
+#ifdef CONFIG_BLOCK
#define MaxSector (~(sector_t)0)
-#define MD_THREAD_NAME_MAX 14
typedef struct mddev_s mddev_t;
typedef struct mdk_rdev_s mdk_rdev_t;
-#define MAX_MD_DEVS 256 /* Max number of md dev */
-
/*
* options passed in raidrun:
*/
-#define MAX_CHUNK_SIZE (4096*1024)
+/* Currently this must fit in an 'int' */
+#define MAX_CHUNK_SIZE (1<<30)
/*
* MD's 'extended' device
sector_t size; /* Device size (in blocks) */
mddev_t *mddev; /* RAID array if running */
- unsigned long last_events; /* IO event timestamp */
+ int last_events; /* IO event timestamp */
struct block_device *bdev; /* block device handle */
struct page *sb_page;
int sb_loaded;
+ __u64 sb_events;
sector_t data_offset; /* start of data in array */
- sector_t sb_offset;
+ sector_t sb_start; /* offset of the super block (in 512byte sectors) */
int sb_size; /* bytes in the superblock */
int preferred_minor; /* autorun support */
#define In_sync 2 /* device is in_sync with rest of array */
#define WriteMostly 4 /* Avoid reading if at all possible */
#define BarriersNotsupp 5 /* BIO_RW_BARRIER is not supported */
+#define AllReserved 6 /* If whole device is reserved for
+ * one array */
+#define AutoDetected 7 /* added by auto-detect */
+#define Blocked 8 /* An error occured on an externally
+ * managed array, don't allow writes
+ * until it is cleared */
+#define StateChanged 9 /* Faulty or Blocked has changed during
+ * interrupt, so it needs to be
+ * notified by the thread */
+ wait_queue_head_t blocked_wait;
int desc_nr; /* descriptor index in the superblock */
int raid_disk; /* role of device in array */
* array and could again if we did a partial
* resync from the bitmap
*/
+ sector_t recovery_offset;/* If this device has been partially
+ * recovered, this is where we were
+ * up to.
+ */
atomic_t nr_pending; /* number of pending requests.
* only maintained for arrays that
* for reporting to userspace and storing
* in superblock.
*/
+ struct work_struct del_work; /* used for delayed sysfs removal */
+
+ struct sysfs_dirent *sysfs_state; /* handle for 'state'
+ * sysfs entry */
};
struct mddev_s
dev_t unit;
int md_minor;
struct list_head disks;
- int sb_dirty;
+ unsigned long flags;
+#define MD_CHANGE_DEVS 0 /* Some device status has changed */
+#define MD_CHANGE_CLEAN 1 /* transition to or from 'clean' */
+#define MD_CHANGE_PENDING 2 /* superblock update in progress */
+
int ro;
struct gendisk *gendisk;
struct kobject kobj;
+ int hold_active;
+#define UNTIL_IOCTL 1
+#define UNTIL_STOP 2
/* Superblock information */
int major_version,
minor_version,
patch_version;
int persistent;
+ int external; /* metadata is
+ * managed externally */
+ char metadata_type[17]; /* externally set*/
int chunk_size;
time_t ctime, utime;
int level, layout;
int raid_disks;
int max_disks;
sector_t size; /* used size of component devices */
- sector_t array_size; /* exported array size */
+ sector_t array_sectors; /* exported array size */
__u64 events;
char uuid[16];
+ /* If the array is being reshaped, we need to record the
+ * new shape and an indication of where we are up to.
+ * This is written to the superblock.
+ * If reshape_position is MaxSector, then no reshape is happening (yet).
+ */
+ sector_t reshape_position;
+ int delta_disks, new_level, new_layout, new_chunk;
+
struct mdk_thread_s *thread; /* management thread */
struct mdk_thread_s *sync_thread; /* doing resync or reconstruct */
- sector_t curr_resync; /* blocks scheduled */
+ sector_t curr_resync; /* last block scheduled */
unsigned long resync_mark; /* a recent timestamp */
sector_t resync_mark_cnt;/* blocks written at resync_mark */
+ sector_t curr_mark_cnt; /* blocks scheduled now */
sector_t resync_max_sectors; /* may be set by personality */
sector_t resync_mismatches; /* count of sectors where
* parity/replica mismatch found
*/
+
+ /* allow user-space to request suspension of IO to regions of the array */
+ sector_t suspend_lo;
+ sector_t suspend_hi;
+ /* if zero, use the system-wide default */
+ int sync_speed_min;
+ int sync_speed_max;
+
+ /* resync even though the same disks are shared among md-devices */
+ int parallel_resync;
+
int ok_start_degraded;
/* recovery/resync flags
* NEEDED: we might need to start a resync/recover
* RUNNING: a thread is running, or about to be started
* SYNC: actually doing a resync, not a recovery
- * ERR: and IO error was detected - abort the resync/recovery
- * INTR: someone requested a (clean) early abort.
+ * RECOVER: doing recovery, or need to try it.
+ * INTR: resync needs to be aborted for some reason
* DONE: thread is done and is waiting to be reaped
* REQUEST: user-space has requested a sync (used with SYNC)
* CHECK: user-space request for for check-only, no repair
+ * RESHAPE: A reshape is happening
+ *
+ * If neither SYNC or RESHAPE are set, then it is a recovery.
*/
#define MD_RECOVERY_RUNNING 0
#define MD_RECOVERY_SYNC 1
-#define MD_RECOVERY_ERR 2
+#define MD_RECOVERY_RECOVER 2
#define MD_RECOVERY_INTR 3
#define MD_RECOVERY_DONE 4
#define MD_RECOVERY_NEEDED 5
#define MD_RECOVERY_REQUESTED 6
#define MD_RECOVERY_CHECK 7
+#define MD_RECOVERY_RESHAPE 8
+#define MD_RECOVERY_FROZEN 9
+
unsigned long recovery;
+ int recovery_disabled; /* if we detect that recovery
+ * will always fail, set this
+ * so we don't loop trying */
int in_sync; /* know to not need resync */
- struct semaphore reconfig_sem;
- atomic_t active;
+ struct mutex reconfig_mutex;
+ atomic_t active; /* general refcount */
+ atomic_t openers; /* number of active opens */
int changed; /* true if we might need to reread partition info */
int degraded; /* whether md should consider
atomic_t recovery_active; /* blocks scheduled, but not written */
wait_queue_head_t recovery_wait;
sector_t recovery_cp;
+ sector_t resync_min; /* user requested sync
+ * starts here */
+ sector_t resync_max; /* resync should pause
+ * when it gets here */
+
+ struct sysfs_dirent *sysfs_state; /* handle for 'array_state'
+ * file in sysfs.
+ */
+ struct sysfs_dirent *sysfs_action; /* handle for 'sync_action' */
+
+ struct work_struct del_work; /* used for delayed sysfs removal */
spinlock_t write_lock;
wait_queue_head_t sb_wait; /* for waiting on superblock updates */
unsigned int safemode_delay;
struct timer_list safemode_timer;
atomic_t writes_pending;
- request_queue_t *queue; /* for plugging ... */
+ struct request_queue *queue; /* for plugging ... */
atomic_t write_behind; /* outstanding async IO */
unsigned int max_write_behind; /* 0 = sync */
int level;
struct list_head list;
struct module *owner;
- int (*make_request)(request_queue_t *q, struct bio *bio);
+ int (*make_request)(struct request_queue *q, struct bio *bio);
int (*run)(mddev_t *mddev);
int (*stop)(mddev_t *mddev);
void (*status)(struct seq_file *seq, mddev_t *mddev);
int (*spare_active) (mddev_t *mddev);
sector_t (*sync_request)(mddev_t *mddev, sector_t sector_nr, int *skipped, int go_faster);
int (*resize) (mddev_t *mddev, sector_t sectors);
- int (*reshape) (mddev_t *mddev, int raid_disks);
+ int (*check_reshape) (mddev_t *mddev);
+ int (*start_reshape) (mddev_t *mddev);
int (*reconfig) (mddev_t *mddev, int layout, int chunk_size);
/* quiesce moves between quiescence states
* 0 - fully active
* iterates through some rdev ringlist. It's safe to remove the
* current 'rdev'. Dont touch 'tmp' though.
*/
-#define ITERATE_RDEV_GENERIC(head,rdev,tmp) \
- \
- for ((tmp) = (head).next; \
- (rdev) = (list_entry((tmp), mdk_rdev_t, same_set)), \
- (tmp) = (tmp)->next, (tmp)->prev != &(head) \
- ; )
+#define rdev_for_each_list(rdev, tmp, head) \
+ list_for_each_entry_safe(rdev, tmp, head, same_set)
+
/*
* iterates through the 'same array disks' ringlist
*/
-#define ITERATE_RDEV(mddev,rdev,tmp) \
- ITERATE_RDEV_GENERIC((mddev)->disks,rdev,tmp)
+#define rdev_for_each(rdev, tmp, mddev) \
+ list_for_each_entry_safe(rdev, tmp, &((mddev)->disks), same_set)
-/*
- * Iterates through 'pending RAID disks'
- */
-#define ITERATE_RDEV_PENDING(rdev,tmp) \
- ITERATE_RDEV_GENERIC(pending_raid_disks,rdev,tmp)
+#define rdev_for_each_rcu(rdev, mddev) \
+ list_for_each_entry_rcu(rdev, &((mddev)->disks), same_set)
typedef struct mdk_thread_s {
void (*run) (mddev_t *mddev);
if (p) put_page(p);
}
+#endif /* CONFIG_BLOCK */
#endif
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff