Merge branch 'for-linus' of git://neil.brown.name/md
* 'for-linus' of git://neil.brown.name/md: md/raid5: remove unusual use of bio_iovec_idx() md/raid5: fix FUA request handling in ops_run_io() md/raid5: fix raid5_set_bi_hw_segments md:Documentation/md.txt - fix typo md/bitmap: remove unused fields from struct bitmap md/bitmap: use proper accessor macro md: check ->hot_remove_disk when removing disk md: Using poll /proc/mdstat can monitor the events of adding a spare disks MD: use is_power_of_2 macro MD: raid5 do not set fullsync MD: support initial bitmap creation in-kernel MD: add sync_super to mddev_t struct MD: raid1 changes to allow use by device mapper MD: move thread wakeups into resume MD: possible typo MD: no sync IO while suspended MD: no integrity register if no gendisk
This commit is contained in:
Linus Torvalds
Коммит
81eb3dd843
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@ -555,7 +555,7 @@ also have
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sync_min
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sync_max
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The two values, given as numbers of sectors, indicate a range
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withing the array where 'check'/'repair' will operate. Must be
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within the array where 'check'/'repair' will operate. Must be
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a multiple of chunk_size. When it reaches "sync_max" it will
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pause, rather than complete.
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You can use 'select' or 'poll' on "sync_completed" to wait for
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@ -534,6 +534,82 @@ void bitmap_print_sb(struct bitmap *bitmap)
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kunmap_atomic(sb, KM_USER0);
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}
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/*
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* bitmap_new_disk_sb
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* @bitmap
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*
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* This function is somewhat the reverse of bitmap_read_sb. bitmap_read_sb
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* reads and verifies the on-disk bitmap superblock and populates bitmap_info.
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* This function verifies 'bitmap_info' and populates the on-disk bitmap
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* structure, which is to be written to disk.
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*
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* Returns: 0 on success, -Exxx on error
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*/
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static int bitmap_new_disk_sb(struct bitmap *bitmap)
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{
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bitmap_super_t *sb;
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unsigned long chunksize, daemon_sleep, write_behind;
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int err = -EINVAL;
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bitmap->sb_page = alloc_page(GFP_KERNEL);
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if (IS_ERR(bitmap->sb_page)) {
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err = PTR_ERR(bitmap->sb_page);
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bitmap->sb_page = NULL;
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return err;
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}
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bitmap->sb_page->index = 0;
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sb = kmap_atomic(bitmap->sb_page, KM_USER0);
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sb->magic = cpu_to_le32(BITMAP_MAGIC);
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sb->version = cpu_to_le32(BITMAP_MAJOR_HI);
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chunksize = bitmap->mddev->bitmap_info.chunksize;
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BUG_ON(!chunksize);
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if (!is_power_of_2(chunksize)) {
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kunmap_atomic(sb, KM_USER0);
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printk(KERN_ERR "bitmap chunksize not a power of 2\n");
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return -EINVAL;
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}
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sb->chunksize = cpu_to_le32(chunksize);
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daemon_sleep = bitmap->mddev->bitmap_info.daemon_sleep;
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if (!daemon_sleep ||
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(daemon_sleep < 1) || (daemon_sleep > MAX_SCHEDULE_TIMEOUT)) {
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printk(KERN_INFO "Choosing daemon_sleep default (5 sec)\n");
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daemon_sleep = 5 * HZ;
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}
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sb->daemon_sleep = cpu_to_le32(daemon_sleep);
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bitmap->mddev->bitmap_info.daemon_sleep = daemon_sleep;
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/*
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* FIXME: write_behind for RAID1. If not specified, what
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* is a good choice? We choose COUNTER_MAX / 2 arbitrarily.
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*/
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write_behind = bitmap->mddev->bitmap_info.max_write_behind;
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if (write_behind > COUNTER_MAX)
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write_behind = COUNTER_MAX / 2;
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sb->write_behind = cpu_to_le32(write_behind);
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bitmap->mddev->bitmap_info.max_write_behind = write_behind;
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/* keep the array size field of the bitmap superblock up to date */
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sb->sync_size = cpu_to_le64(bitmap->mddev->resync_max_sectors);
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memcpy(sb->uuid, bitmap->mddev->uuid, 16);
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bitmap->flags |= BITMAP_STALE;
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sb->state |= cpu_to_le32(BITMAP_STALE);
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bitmap->events_cleared = bitmap->mddev->events;
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sb->events_cleared = cpu_to_le64(bitmap->mddev->events);
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bitmap->flags |= BITMAP_HOSTENDIAN;
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sb->version = cpu_to_le32(BITMAP_MAJOR_HOSTENDIAN);
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kunmap_atomic(sb, KM_USER0);
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return 0;
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}
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/* read the superblock from the bitmap file and initialize some bitmap fields */
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static int bitmap_read_sb(struct bitmap *bitmap)
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{
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@ -575,7 +651,7 @@ static int bitmap_read_sb(struct bitmap *bitmap)
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reason = "unrecognized superblock version";
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else if (chunksize < 512)
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reason = "bitmap chunksize too small";
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else if ((1 << ffz(~chunksize)) != chunksize)
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else if (!is_power_of_2(chunksize))
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reason = "bitmap chunksize not a power of 2";
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else if (daemon_sleep < 1 || daemon_sleep > MAX_SCHEDULE_TIMEOUT)
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reason = "daemon sleep period out of range";
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@ -1076,8 +1152,8 @@ static int bitmap_init_from_disk(struct bitmap *bitmap, sector_t start)
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}
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printk(KERN_INFO "%s: bitmap initialized from disk: "
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"read %lu/%lu pages, set %lu bits\n",
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bmname(bitmap), bitmap->file_pages, num_pages, bit_cnt);
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"read %lu/%lu pages, set %lu of %lu bits\n",
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bmname(bitmap), bitmap->file_pages, num_pages, bit_cnt, chunks);
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return 0;
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@ -1332,7 +1408,7 @@ int bitmap_startwrite(struct bitmap *bitmap, sector_t offset, unsigned long sect
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return 0;
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}
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if (unlikely((*bmc & COUNTER_MAX) == COUNTER_MAX)) {
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if (unlikely(COUNTER(*bmc) == COUNTER_MAX)) {
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DEFINE_WAIT(__wait);
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/* note that it is safe to do the prepare_to_wait
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* after the test as long as we do it before dropping
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@ -1404,10 +1480,10 @@ void bitmap_endwrite(struct bitmap *bitmap, sector_t offset, unsigned long secto
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sysfs_notify_dirent_safe(bitmap->sysfs_can_clear);
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}
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if (!success && ! (*bmc & NEEDED_MASK))
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if (!success && !NEEDED(*bmc))
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*bmc |= NEEDED_MASK;
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if ((*bmc & COUNTER_MAX) == COUNTER_MAX)
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if (COUNTER(*bmc) == COUNTER_MAX)
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wake_up(&bitmap->overflow_wait);
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(*bmc)--;
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@ -1728,9 +1804,16 @@ int bitmap_create(mddev_t *mddev)
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vfs_fsync(file, 1);
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}
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/* read superblock from bitmap file (this sets mddev->bitmap_info.chunksize) */
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if (!mddev->bitmap_info.external)
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err = bitmap_read_sb(bitmap);
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else {
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if (!mddev->bitmap_info.external) {
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/*
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* If 'MD_ARRAY_FIRST_USE' is set, then device-mapper is
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* instructing us to create a new on-disk bitmap instance.
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*/
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if (test_and_clear_bit(MD_ARRAY_FIRST_USE, &mddev->flags))
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err = bitmap_new_disk_sb(bitmap);
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else
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err = bitmap_read_sb(bitmap);
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} else {
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err = 0;
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if (mddev->bitmap_info.chunksize == 0 ||
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mddev->bitmap_info.daemon_sleep == 0)
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@ -1754,9 +1837,6 @@ int bitmap_create(mddev_t *mddev)
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bitmap->chunks = chunks;
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bitmap->pages = pages;
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bitmap->missing_pages = pages;
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bitmap->counter_bits = COUNTER_BITS;
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bitmap->syncchunk = ~0UL;
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#ifdef INJECT_FATAL_FAULT_1
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bitmap->bp = NULL;
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@ -85,7 +85,6 @@
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typedef __u16 bitmap_counter_t;
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#define COUNTER_BITS 16
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#define COUNTER_BIT_SHIFT 4
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#define COUNTER_BYTE_RATIO (COUNTER_BITS / 8)
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#define COUNTER_BYTE_SHIFT (COUNTER_BIT_SHIFT - 3)
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#define NEEDED_MASK ((bitmap_counter_t) (1 << (COUNTER_BITS - 1)))
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@ -196,19 +195,10 @@ struct bitmap {
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mddev_t *mddev; /* the md device that the bitmap is for */
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int counter_bits; /* how many bits per block counter */
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/* bitmap chunksize -- how much data does each bit represent? */
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unsigned long chunkshift; /* chunksize = 2^chunkshift (for bitops) */
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unsigned long chunks; /* total number of data chunks for the array */
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/* We hold a count on the chunk currently being synced, and drop
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* it when the last block is started. If the resync is aborted
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* midway, we need to be able to drop that count, so we remember
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* the counted chunk..
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*/
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unsigned long syncchunk;
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__u64 events_cleared;
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int need_sync;
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@ -351,6 +351,9 @@ void mddev_resume(mddev_t *mddev)
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mddev->suspended = 0;
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wake_up(&mddev->sb_wait);
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mddev->pers->quiesce(mddev, 0);
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md_wakeup_thread(mddev->thread);
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md_wakeup_thread(mddev->sync_thread); /* possibly kick off a reshape */
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}
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EXPORT_SYMBOL_GPL(mddev_resume);
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@ -1750,6 +1753,18 @@ static struct super_type super_types[] = {
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},
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};
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static void sync_super(mddev_t *mddev, mdk_rdev_t *rdev)
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{
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if (mddev->sync_super) {
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mddev->sync_super(mddev, rdev);
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return;
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}
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BUG_ON(mddev->major_version >= ARRAY_SIZE(super_types));
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super_types[mddev->major_version].sync_super(mddev, rdev);
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}
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static int match_mddev_units(mddev_t *mddev1, mddev_t *mddev2)
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{
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mdk_rdev_t *rdev, *rdev2;
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@ -1781,8 +1796,8 @@ int md_integrity_register(mddev_t *mddev)
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if (list_empty(&mddev->disks))
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return 0; /* nothing to do */
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if (blk_get_integrity(mddev->gendisk))
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return 0; /* already registered */
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if (!mddev->gendisk || blk_get_integrity(mddev->gendisk))
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return 0; /* shouldn't register, or already is */
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list_for_each_entry(rdev, &mddev->disks, same_set) {
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/* skip spares and non-functional disks */
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if (test_bit(Faulty, &rdev->flags))
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@ -2168,8 +2183,7 @@ static void sync_sbs(mddev_t * mddev, int nospares)
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/* Don't update this superblock */
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rdev->sb_loaded = 2;
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} else {
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super_types[mddev->major_version].
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sync_super(mddev, rdev);
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sync_super(mddev, rdev);
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rdev->sb_loaded = 1;
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}
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}
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@ -2462,7 +2476,7 @@ slot_store(mdk_rdev_t *rdev, const char *buf, size_t len)
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if (rdev->raid_disk == -1)
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return -EEXIST;
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/* personality does all needed checks */
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if (rdev->mddev->pers->hot_add_disk == NULL)
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if (rdev->mddev->pers->hot_remove_disk == NULL)
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return -EINVAL;
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err = rdev->mddev->pers->
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hot_remove_disk(rdev->mddev, rdev->raid_disk);
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@ -4619,9 +4633,6 @@ int md_run(mddev_t *mddev)
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if (mddev->flags)
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md_update_sb(mddev, 0);
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md_wakeup_thread(mddev->thread);
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md_wakeup_thread(mddev->sync_thread); /* possibly kick off a reshape */
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md_new_event(mddev);
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sysfs_notify_dirent_safe(mddev->sysfs_state);
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sysfs_notify_dirent_safe(mddev->sysfs_action);
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@ -4642,6 +4653,10 @@ static int do_md_run(mddev_t *mddev)
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bitmap_destroy(mddev);
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goto out;
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}
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md_wakeup_thread(mddev->thread);
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md_wakeup_thread(mddev->sync_thread); /* possibly kick off a reshape */
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set_capacity(mddev->gendisk, mddev->array_sectors);
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revalidate_disk(mddev->gendisk);
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mddev->changed = 1;
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|
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@ -5259,6 +5274,8 @@ static int add_new_disk(mddev_t * mddev, mdu_disk_info_t *info)
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if (mddev->degraded)
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set_bit(MD_RECOVERY_RECOVER, &mddev->recovery);
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set_bit(MD_RECOVERY_NEEDED, &mddev->recovery);
|
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if (!err)
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md_new_event(mddev);
|
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md_wakeup_thread(mddev->thread);
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return err;
|
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}
|
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|
|
@ -6866,8 +6883,8 @@ void md_do_sync(mddev_t *mddev)
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* Tune reconstruction:
|
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*/
|
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window = 32*(PAGE_SIZE/512);
|
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printk(KERN_INFO "md: using %dk window, over a total of %llu blocks.\n",
|
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window/2,(unsigned long long) max_sectors/2);
|
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printk(KERN_INFO "md: using %dk window, over a total of %lluk.\n",
|
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window/2, (unsigned long long)max_sectors/2);
|
||||
|
||||
atomic_set(&mddev->recovery_active, 0);
|
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last_check = 0;
|
||||
|
|
@ -7045,7 +7062,6 @@ void md_do_sync(mddev_t *mddev)
|
|||
}
|
||||
EXPORT_SYMBOL_GPL(md_do_sync);
|
||||
|
||||
|
||||
static int remove_and_add_spares(mddev_t *mddev)
|
||||
{
|
||||
mdk_rdev_t *rdev;
|
||||
|
|
@ -7157,6 +7173,9 @@ static void reap_sync_thread(mddev_t *mddev)
|
|||
*/
|
||||
void md_check_recovery(mddev_t *mddev)
|
||||
{
|
||||
if (mddev->suspended)
|
||||
return;
|
||||
|
||||
if (mddev->bitmap)
|
||||
bitmap_daemon_work(mddev);
|
||||
|
||||
|
|
|
|||
|
|
@ -124,6 +124,7 @@ struct mddev_s
|
|||
#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 /* switch from 'clean' to 'active' in progress */
|
||||
#define MD_ARRAY_FIRST_USE 3 /* First use of array, needs initialization */
|
||||
|
||||
int suspended;
|
||||
atomic_t active_io;
|
||||
|
|
@ -330,6 +331,7 @@ struct mddev_s
|
|||
atomic_t flush_pending;
|
||||
struct work_struct flush_work;
|
||||
struct work_struct event_work; /* used by dm to report failure event */
|
||||
void (*sync_super)(mddev_t *mddev, mdk_rdev_t *rdev);
|
||||
};
|
||||
|
||||
|
||||
|
|
|
|||
|
|
@ -497,21 +497,19 @@ static int read_balance(conf_t *conf, r1bio_t *r1_bio)
|
|||
return best_disk;
|
||||
}
|
||||
|
||||
static int raid1_congested(void *data, int bits)
|
||||
int md_raid1_congested(mddev_t *mddev, int bits)
|
||||
{
|
||||
mddev_t *mddev = data;
|
||||
conf_t *conf = mddev->private;
|
||||
int i, ret = 0;
|
||||
|
||||
if (mddev_congested(mddev, bits))
|
||||
return 1;
|
||||
|
||||
rcu_read_lock();
|
||||
for (i = 0; i < mddev->raid_disks; i++) {
|
||||
mdk_rdev_t *rdev = rcu_dereference(conf->mirrors[i].rdev);
|
||||
if (rdev && !test_bit(Faulty, &rdev->flags)) {
|
||||
struct request_queue *q = bdev_get_queue(rdev->bdev);
|
||||
|
||||
BUG_ON(!q);
|
||||
|
||||
/* Note the '|| 1' - when read_balance prefers
|
||||
* non-congested targets, it can be removed
|
||||
*/
|
||||
|
|
@ -524,7 +522,15 @@ static int raid1_congested(void *data, int bits)
|
|||
rcu_read_unlock();
|
||||
return ret;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(md_raid1_congested);
|
||||
|
||||
static int raid1_congested(void *data, int bits)
|
||||
{
|
||||
mddev_t *mddev = data;
|
||||
|
||||
return mddev_congested(mddev, bits) ||
|
||||
md_raid1_congested(mddev, bits);
|
||||
}
|
||||
|
||||
static void flush_pending_writes(conf_t *conf)
|
||||
{
|
||||
|
|
@ -1972,6 +1978,8 @@ static int run(mddev_t *mddev)
|
|||
return PTR_ERR(conf);
|
||||
|
||||
list_for_each_entry(rdev, &mddev->disks, same_set) {
|
||||
if (!mddev->gendisk)
|
||||
continue;
|
||||
disk_stack_limits(mddev->gendisk, rdev->bdev,
|
||||
rdev->data_offset << 9);
|
||||
/* as we don't honour merge_bvec_fn, we must never risk
|
||||
|
|
@ -2013,8 +2021,10 @@ static int run(mddev_t *mddev)
|
|||
|
||||
md_set_array_sectors(mddev, raid1_size(mddev, 0, 0));
|
||||
|
||||
mddev->queue->backing_dev_info.congested_fn = raid1_congested;
|
||||
mddev->queue->backing_dev_info.congested_data = mddev;
|
||||
if (mddev->queue) {
|
||||
mddev->queue->backing_dev_info.congested_fn = raid1_congested;
|
||||
mddev->queue->backing_dev_info.congested_data = mddev;
|
||||
}
|
||||
return md_integrity_register(mddev);
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -126,4 +126,6 @@ struct r1bio_s {
|
|||
*/
|
||||
#define R1BIO_Returned 6
|
||||
|
||||
extern int md_raid1_congested(mddev_t *mddev, int bits);
|
||||
|
||||
#endif
|
||||
|
|
|
|||
|
|
@ -129,7 +129,7 @@ static inline int raid5_dec_bi_hw_segments(struct bio *bio)
|
|||
|
||||
static inline void raid5_set_bi_hw_segments(struct bio *bio, unsigned int cnt)
|
||||
{
|
||||
bio->bi_phys_segments = raid5_bi_phys_segments(bio) || (cnt << 16);
|
||||
bio->bi_phys_segments = raid5_bi_phys_segments(bio) | (cnt << 16);
|
||||
}
|
||||
|
||||
/* Find first data disk in a raid6 stripe */
|
||||
|
|
@ -514,7 +514,7 @@ static void ops_run_io(struct stripe_head *sh, struct stripe_head_state *s)
|
|||
bi = &sh->dev[i].req;
|
||||
|
||||
bi->bi_rw = rw;
|
||||
if (rw == WRITE)
|
||||
if (rw & WRITE)
|
||||
bi->bi_end_io = raid5_end_write_request;
|
||||
else
|
||||
bi->bi_end_io = raid5_end_read_request;
|
||||
|
|
@ -548,13 +548,13 @@ static void ops_run_io(struct stripe_head *sh, struct stripe_head_state *s)
|
|||
bi->bi_io_vec[0].bv_offset = 0;
|
||||
bi->bi_size = STRIPE_SIZE;
|
||||
bi->bi_next = NULL;
|
||||
if (rw == WRITE &&
|
||||
if ((rw & WRITE) &&
|
||||
test_bit(R5_ReWrite, &sh->dev[i].flags))
|
||||
atomic_add(STRIPE_SECTORS,
|
||||
&rdev->corrected_errors);
|
||||
generic_make_request(bi);
|
||||
} else {
|
||||
if (rw == WRITE)
|
||||
if (rw & WRITE)
|
||||
set_bit(STRIPE_DEGRADED, &sh->state);
|
||||
pr_debug("skip op %ld on disc %d for sector %llu\n",
|
||||
bi->bi_rw, i, (unsigned long long)sh->sector);
|
||||
|
|
@ -585,7 +585,7 @@ async_copy_data(int frombio, struct bio *bio, struct page *page,
|
|||
init_async_submit(&submit, flags, tx, NULL, NULL, NULL);
|
||||
|
||||
bio_for_each_segment(bvl, bio, i) {
|
||||
int len = bio_iovec_idx(bio, i)->bv_len;
|
||||
int len = bvl->bv_len;
|
||||
int clen;
|
||||
int b_offset = 0;
|
||||
|
||||
|
|
@ -601,8 +601,8 @@ async_copy_data(int frombio, struct bio *bio, struct page *page,
|
|||
clen = len;
|
||||
|
||||
if (clen > 0) {
|
||||
b_offset += bio_iovec_idx(bio, i)->bv_offset;
|
||||
bio_page = bio_iovec_idx(bio, i)->bv_page;
|
||||
b_offset += bvl->bv_offset;
|
||||
bio_page = bvl->bv_page;
|
||||
if (frombio)
|
||||
tx = async_memcpy(page, bio_page, page_offset,
|
||||
b_offset, clen, &submit);
|
||||
|
|
@ -4858,7 +4858,7 @@ static raid5_conf_t *setup_conf(mddev_t *mddev)
|
|||
printk(KERN_INFO "md/raid:%s: device %s operational as raid"
|
||||
" disk %d\n",
|
||||
mdname(mddev), bdevname(rdev->bdev, b), raid_disk);
|
||||
} else
|
||||
} else if (rdev->saved_raid_disk != raid_disk)
|
||||
/* Cannot rely on bitmap to complete recovery */
|
||||
conf->fullsync = 1;
|
||||
}
|
||||
|
|
|
|||
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