#ifndef _MD_K_H
#define _MD_K_H
+/* and dm-bio-list.h is not under include/linux because.... ??? */
+#include "../../../drivers/md/dm-bio-list.h"
+
#define MD_RESERVED 0UL
#define LINEAR 1UL
#define RAID0 2UL
#define MAX_CHUNK_SIZE (4096*1024)
-/*
- * default readahead
- */
-
-static inline int disk_faulty(mdp_disk_t * d)
-{
- return d->state & (1 << MD_DISK_FAULTY);
-}
-
-static inline int disk_active(mdp_disk_t * d)
-{
- return d->state & (1 << MD_DISK_ACTIVE);
-}
-
-static inline int disk_sync(mdp_disk_t * d)
-{
- return d->state & (1 << MD_DISK_SYNC);
-}
-
-static inline int disk_spare(mdp_disk_t * d)
-{
- return !disk_sync(d) && !disk_active(d) && !disk_faulty(d);
-}
-
-static inline int disk_removed(mdp_disk_t * d)
-{
- return d->state & (1 << MD_DISK_REMOVED);
-}
-
-static inline void mark_disk_faulty(mdp_disk_t * d)
-{
- d->state |= (1 << MD_DISK_FAULTY);
-}
-
-static inline void mark_disk_active(mdp_disk_t * d)
-{
- d->state |= (1 << MD_DISK_ACTIVE);
-}
-
-static inline void mark_disk_sync(mdp_disk_t * d)
-{
- d->state |= (1 << MD_DISK_SYNC);
-}
-
-static inline void mark_disk_spare(mdp_disk_t * d)
-{
- d->state = 0;
-}
-
-static inline void mark_disk_removed(mdp_disk_t * d)
-{
- d->state = (1 << MD_DISK_FAULTY) | (1 << MD_DISK_REMOVED);
-}
-
-static inline void mark_disk_inactive(mdp_disk_t * d)
-{
- d->state &= ~(1 << MD_DISK_ACTIVE);
-}
-
-static inline void mark_disk_nonsync(mdp_disk_t * d)
-{
- d->state &= ~(1 << MD_DISK_SYNC);
-}
-
/*
* MD's 'extended' device
*/
int sb_loaded;
sector_t data_offset; /* start of data in array */
sector_t sb_offset;
+ int sb_size; /* bytes in the superblock */
int preferred_minor; /* autorun support */
+ struct kobject kobj;
+
/* A device can be in one of three states based on two flags:
* Not working: faulty==1 in_sync==0
* Fully working: faulty==0 in_sync==1
* It can never have faulty==1, in_sync==1
* This reduces the burden of testing multiple flags in many cases
*/
- int faulty; /* if faulty do not issue IO requests */
- int in_sync; /* device is a full member of the array */
+
+ unsigned long flags;
+#define Faulty 1 /* device is known to have a fault */
+#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 */
int desc_nr; /* descriptor index in the superblock */
int raid_disk; /* role of device in array */
+ int saved_raid_disk; /* role that device used to have in the
+ * array and could again if we did a partial
+ * resync from the bitmap
+ */
atomic_t nr_pending; /* number of pending requests.
* only maintained for arrays that
* support hot removal
*/
+ atomic_t read_errors; /* number of consecutive read errors that
+ * we have tried to ignore.
+ */
};
typedef struct mdk_personality_s mdk_personality_t;
struct gendisk *gendisk;
+ struct kobject kobj;
+
/* Superblock information */
int major_version,
minor_version,
sector_t resync_mark_cnt;/* blocks written at resync_mark */
sector_t resync_max_sectors; /* may be set by personality */
+
+ sector_t resync_mismatches; /* count of sectors where
+ * parity/replica mismatch found
+ */
/* recovery/resync flags
* NEEDED: we might need to start a resync/recover
* RUNNING: a thread is running, or about to be started
* ERR: and IO error was detected - abort the resync/recovery
* INTR: someone requested a (clean) early abort.
* 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
*/
#define MD_RECOVERY_RUNNING 0
#define MD_RECOVERY_SYNC 1
#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
unsigned long recovery;
int in_sync; /* know to not need resync */
int degraded; /* whether md should consider
* adding a spare
*/
+ int barriers_work; /* initialised to true, cleared as soon
+ * as a barrier request to slave
+ * fails. Only supported
+ */
+ struct bio *biolist; /* bios that need to be retried
+ * because BIO_RW_BARRIER is not supported
+ */
atomic_t recovery_active; /* blocks scheduled, but not written */
wait_queue_head_t recovery_wait;
sector_t recovery_cp;
+
+ spinlock_t write_lock;
+ wait_queue_head_t sb_wait; /* for waiting on superblock updates */
+ atomic_t pending_writes; /* number of active superblock writes */
+
unsigned int safemode; /* if set, update "clean" superblock
* when no writes pending.
*/
atomic_t writes_pending;
request_queue_t *queue; /* for plugging ... */
+ atomic_t write_behind; /* outstanding async IO */
+ unsigned int max_write_behind; /* 0 = sync */
+
+ struct bitmap *bitmap; /* the bitmap for the device */
+ struct file *bitmap_file; /* the bitmap file */
+ long bitmap_offset; /* offset from superblock of
+ * start of bitmap. May be
+ * negative, but not '0'
+ */
+ long default_bitmap_offset; /* this is the offset to use when
+ * hot-adding a bitmap. It should
+ * eventually be settable by sysfs.
+ */
+
struct list_head all_mddevs;
};
static inline void rdev_dec_pending(mdk_rdev_t *rdev, mddev_t *mddev)
{
- int faulty = rdev->faulty;
+ int faulty = test_bit(Faulty, &rdev->flags);
if (atomic_dec_and_test(&rdev->nr_pending) && faulty)
set_bit(MD_RECOVERY_NEEDED, &mddev->recovery);
}
int (*hot_add_disk) (mddev_t *mddev, mdk_rdev_t *rdev);
int (*hot_remove_disk) (mddev_t *mddev, int number);
int (*spare_active) (mddev_t *mddev);
- int (*sync_request)(mddev_t *mddev, sector_t sector_nr, int go_faster);
+ 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 (*reconfig) (mddev_t *mddev, int layout, int chunk_size);
+ /* quiesce moves between quiescence states
+ * 0 - fully active
+ * 1 - no new requests allowed
+ * others - reserved
+ */
+ void (*quiesce) (mddev_t *mddev, int state);
+};
+
+
+struct md_sysfs_entry {
+ struct attribute attr;
+ ssize_t (*show)(mddev_t *, char *);
+ ssize_t (*store)(mddev_t *, const char *, size_t);
};
mddev_t *mddev;
wait_queue_head_t wqueue;
unsigned long flags;
- struct completion *event;
struct task_struct *tsk;
- const char *name;
+ unsigned long timeout;
} mdk_thread_t;
#define THREAD_WAKEUP 0
projects / linux-2.6-omap-h63xx.git / blobdiff