/* 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 RAID1 3UL
-#define RAID5 4UL
-#define TRANSLUCENT 5UL
-#define HSM 6UL
-#define MULTIPATH 7UL
-#define RAID6 8UL
-#define RAID10 9UL
-#define FAULTY 10UL
-#define MAX_PERSONALITY 11UL
-
#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)
+
#define MaxSector (~(sector_t)0)
#define MD_THREAD_NAME_MAX 14
-static inline int pers_to_level (int pers)
-{
- switch (pers) {
- case FAULTY: return LEVEL_FAULTY;
- case MULTIPATH: return LEVEL_MULTIPATH;
- case HSM: return -3;
- case TRANSLUCENT: return -2;
- case LINEAR: return LEVEL_LINEAR;
- case RAID0: return 0;
- case RAID1: return 1;
- case RAID5: return 5;
- case RAID6: return 6;
- case RAID10: return 10;
- }
- BUG();
- return MD_RESERVED;
-}
-
-static inline int level_to_pers (int level)
-{
- switch (level) {
- case LEVEL_FAULTY: return FAULTY;
- case LEVEL_MULTIPATH: return MULTIPATH;
- case -3: return HSM;
- case -2: return TRANSLUCENT;
- case LEVEL_LINEAR: return LINEAR;
- case 0: return RAID0;
- case 1: return RAID1;
- case 4:
- case 5: return RAID5;
- case 6: return RAID6;
- case 10: return RAID10;
- }
- return MD_RESERVED;
-}
-
typedef struct mddev_s mddev_t;
typedef struct mdk_rdev_s mdk_rdev_t;
* options passed in raidrun:
*/
-#define MAX_CHUNK_SIZE (4096*1024)
+/* Currently this must fix in an 'int' */
+#define MAX_CHUNK_SIZE (1<<30)
/*
* MD's 'extended' device
struct page *sb_page;
int sb_loaded;
+ __u64 sb_events;
sector_t data_offset; /* start of data in array */
sector_t sb_offset;
int sb_size; /* bytes in the superblock */
* 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
atomic_t read_errors; /* number of consecutive read errors that
* we have tried to ignore.
*/
+ atomic_t corrected_errors; /* number of corrected read errors,
+ * for reporting to userspace and storing
+ * in superblock.
+ */
};
-typedef struct mdk_personality_s mdk_personality_t;
-
struct mddev_s
{
void *private;
- mdk_personality_t *pers;
+ struct mdk_personality *pers;
dev_t unit;
int md_minor;
struct list_head disks;
int chunk_size;
time_t ctime, utime;
int level, layout;
+ char clevel[16];
int raid_disks;
int max_disks;
sector_t size; /* used size of component devices */
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 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;
+
+ 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
* 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_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 in_sync; /* know to not need resync */
- struct semaphore reconfig_sem;
+ struct mutex reconfig_mutex;
atomic_t active;
int changed; /* true if we might need to reread partition info */
atomic_add(nr_sectors, &bdev->bd_contains->bd_disk->sync_io);
}
-struct mdk_personality_s
+struct mdk_personality
{
char *name;
+ int level;
+ struct list_head list;
struct module *owner;
int (*make_request)(request_queue_t *q, struct bio *bio);
int (*run)(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
return mddev->gendisk ? mddev->gendisk->disk_name : "mdX";
}
-extern mdk_rdev_t * find_rdev_nr(mddev_t *mddev, int nr);
-
/*
* iterates through some rdev ringlist. It's safe to remove the
* current 'rdev'. Dont touch 'tmp' though.
__wait_event_lock_irq(wq, condition, lock, cmd); \
} while (0)
+static inline void safe_put_page(struct page *p)
+{
+ if (p) put_page(p);
+}
+
#endif
projects / powerpc.git / blobdiff