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!
diff --git a/include/linux/raid/md_k.h b/include/linux/raid/md_k.h
new file mode 100644
index 0000000..c9a0d40
--- /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
+