fedora core 6 1.2949 + vserver 2.2.0

[linux-2.6.git] / include / linux / raid / md_k.h

diff --git a/include/linux/raid/md_k.h b/include/linux/raid/md_k.h
index 617b950..8245c28 100644 (file)
--- a/include/linux/raid/md_k.h
+++ b/include/linux/raid/md_k.h
@@ -18,6 +18,8 @@
 /* and dm-bio-list.h is not under include/linux because.... ??? */
 #include "../../../drivers/md/dm-bio-list.h"
 
+#ifdef CONFIG_BLOCK
+
 #define        LEVEL_MULTIPATH         (-4)
 #define        LEVEL_LINEAR            (-1)
 #define        LEVEL_FAULTY            (-5)
@@ -29,18 +31,16 @@
 #define        LEVEL_NONE              (-1000000)
 
 #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
@@ -57,6 +57,7 @@ struct mdk_rdev_s
 
        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 */
@@ -87,6 +88,10 @@ struct mdk_rdev_s
                                         * 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
@@ -108,7 +113,11 @@ 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;
@@ -132,17 +141,30 @@ struct mddev_s
 
        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;
@@ -157,6 +179,9 @@ struct mddev_s
         * 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
@@ -166,10 +191,13 @@ struct mddev_s
 #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 */
@@ -249,7 +277,8 @@ struct mdk_personality
        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
@@ -336,5 +365,6 @@ static inline void safe_put_page(struct page *p)
        if (p) put_page(p);
 }
 
+#endif /* CONFIG_BLOCK */
 #endif