Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 369 insertions, 0 deletions

diff --git a/include/linux/raid/md_k.h b/include/linux/raid/md_k.h
new file mode 100644
index 00000000000..c9a0d4013be
--- /dev/null
+++ b/include/linux/raid/md_k.h
@@ -0,0 +1,369 @@
+/*
+   md_k.h : kernel internal structure of the Linux MD driver
+          Copyright (C) 1996-98 Ingo Molnar, Gadi Oxman
+          
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2, or (at your option)
+   any later version.
+   
+   You should have received a copy of the GNU General Public License
+   (for example /usr/src/linux/COPYING); if not, write to the Free
+   Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  
+*/
+
+#ifndef _MD_K_H
+#define _MD_K_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)
+
+#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;
+
+#define MAX_MD_DEVS  256        /* Max number of md dev */
+
+/*
+ * options passed in raidrun:
+ */
+
+#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
+ */
+struct mdk_rdev_s
+{
+        struct list_head same_set;      /* RAID devices within the same set */
+
+        sector_t size;                  /* Device size (in blocks) */
+        mddev_t *mddev;                 /* RAID array if running */
+        unsigned long last_events;      /* IO event timestamp */
+
+        struct block_device *bdev;      /* block device handle */
+
+        struct page     *sb_page;
+        int             sb_loaded;
+        sector_t        data_offset;    /* start of data in array */
+        sector_t        sb_offset;
+        int             preferred_minor;        /* autorun support */
+
+        /* 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
+         * Working, but not
+         * in sync with array
+         *                faulty==0 in_sync==0
+         *
+         * 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 */
+
+        int desc_nr;                    /* descriptor index in the superblock */
+        int raid_disk;                  /* role of device in array */
+
+        atomic_t        nr_pending;     /* number of pending requests.
+                                         * only maintained for arrays that
+                                         * support hot removal
+                                         */
+};
+
+typedef struct mdk_personality_s mdk_personality_t;
+
+struct mddev_s
+{
+        void                            *private;
+        mdk_personality_t               *pers;
+        dev_t                           unit;
+        int                             md_minor;
+        struct list_head                disks;
+        int                             sb_dirty;
+        int                             ro;
+
+        struct gendisk                  *gendisk;
+
+        /* Superblock information */
+        int                             major_version,
+                                        minor_version,
+                                        patch_version;
+        int                             persistent;
+        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 */
+        __u64                           events;
+
+        char                            uuid[16];
+
+        struct mdk_thread_s             *thread;        /* management thread */
+        struct mdk_thread_s             *sync_thread;   /* doing resync or reconstruct */
+        sector_t                        curr_resync;    /* blocks scheduled */
+        unsigned long                   resync_mark;    /* a recent timestamp */
+        sector_t                        resync_mark_cnt;/* blocks written at resync_mark */
+
+        sector_t                        resync_max_sectors; /* may be set by personality */
+        /* 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.
+         * DONE:     thread is done and is waiting to be reaped
+         */
+#define MD_RECOVERY_RUNNING     0
+#define MD_RECOVERY_SYNC        1
+#define MD_RECOVERY_ERR         2
+#define MD_RECOVERY_INTR        3
+#define MD_RECOVERY_DONE        4
+#define MD_RECOVERY_NEEDED      5
+        unsigned long                   recovery;
+
+        int                             in_sync;        /* know to not need resync */
+        struct semaphore                reconfig_sem;
+        atomic_t                        active;
+
+        int                             changed;        /* true if we might need to reread partition info */
+        int                             degraded;       /* whether md should consider
+                                                         * adding a spare
+                                                         */
+
+        atomic_t                        recovery_active; /* blocks scheduled, but not written */
+        wait_queue_head_t               recovery_wait;
+        sector_t                        recovery_cp;
+        unsigned int                    safemode;       /* if set, update "clean" superblock
+                                                         * when no writes pending.
+                                                         */ 
+        unsigned int                    safemode_delay;
+        struct timer_list               safemode_timer;
+        atomic_t                        writes_pending; 
+        request_queue_t                 *queue; /* for plugging ... */
+
+        struct list_head                all_mddevs;
+};
+
+
+static inline void rdev_dec_pending(mdk_rdev_t *rdev, mddev_t *mddev)
+{
+        int faulty = rdev->faulty;
+        if (atomic_dec_and_test(&rdev->nr_pending) && faulty)
+                set_bit(MD_RECOVERY_NEEDED, &mddev->recovery);
+}
+
+static inline void md_sync_acct(struct block_device *bdev, unsigned long nr_sectors)
+{
+        atomic_add(nr_sectors, &bdev->bd_contains->bd_disk->sync_io);
+}
+
+struct mdk_personality_s
+{
+        char *name;
+        struct module *owner;
+        int (*make_request)(request_queue_t *q, struct bio *bio);
+        int (*run)(mddev_t *mddev);
+        int (*stop)(mddev_t *mddev);
+        void (*status)(struct seq_file *seq, mddev_t *mddev);
+        /* error_handler must set ->faulty and clear ->in_sync
+         * if appropriate, and should abort recovery if needed 
+         */
+        void (*error_handler)(mddev_t *mddev, mdk_rdev_t *rdev);
+        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);
+        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);
+};
+
+
+static inline char * mdname (mddev_t * mddev)
+{
+        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.
+ */
+#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)     \
+                ; )
+/*
+ * iterates through the 'same array disks' ringlist
+ */
+#define ITERATE_RDEV(mddev,rdev,tmp)                                    \
+        ITERATE_RDEV_GENERIC((mddev)->disks,rdev,tmp)
+
+/*
+ * Iterates through 'pending RAID disks'
+ */
+#define ITERATE_RDEV_PENDING(rdev,tmp)                                  \
+        ITERATE_RDEV_GENERIC(pending_raid_disks,rdev,tmp)
+
+typedef struct mdk_thread_s {
+        void                    (*run) (mddev_t *mddev);
+        mddev_t                 *mddev;
+        wait_queue_head_t       wqueue;
+        unsigned long           flags;
+        struct completion       *event;
+        struct task_struct      *tsk;
+        const char              *name;
+} mdk_thread_t;
+
+#define THREAD_WAKEUP  0
+
+#define __wait_event_lock_irq(wq, condition, lock, cmd)                 \
+do {                                                                    \
+        wait_queue_t __wait;                                            \
+        init_waitqueue_entry(&__wait, current);                         \
+                                                                        \
+        add_wait_queue(&wq, &__wait);                                   \
+        for (;;) {                                                      \
+                set_current_state(TASK_UNINTERRUPTIBLE);                \
+                if (condition)                                          \
+                        break;                                          \
+                spin_unlock_irq(&lock);                                 \
+                cmd;                                                    \
+                schedule();                                             \
+                spin_lock_irq(&lock);                                   \
+        }                                                               \
+        current->state = TASK_RUNNING;                                  \
+        remove_wait_queue(&wq, &__wait);                                \
+} while (0)
+
+#define wait_event_lock_irq(wq, condition, lock, cmd)                   \
+do {                                                                    \
+        if (condition)                                                  \
+                break;                                                  \
+        __wait_event_lock_irq(wq, condition, lock, cmd);                \
+} while (0)
+
+#endif
+