forked from Minki/linux
md: Turn rdev->sb_offset into a sector-based quantity.
Rename it to sb_start to make sure all users have been converted. Signed-off-by: Andre Noll <maan@systemlinux.org> Signed-off-by: Neil Brown <neilb@suse.de>
This commit is contained in:
Andre Noll
Neil Brown
parent
b73df2d3d6
commit
0f420358e3
@ -225,7 +225,7 @@ static struct page *read_sb_page(mddev_t *mddev, long offset, unsigned long inde
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|| test_bit(Faulty, &rdev->flags))
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continue;
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target = (rdev->sb_offset << 1) + offset + index * (PAGE_SIZE/512);
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target = rdev->sb_start + offset + index * (PAGE_SIZE/512);
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if (sync_page_io(rdev->bdev, target, PAGE_SIZE, page, READ)) {
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page->index = index;
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@ -262,12 +262,12 @@ static int write_sb_page(struct bitmap *bitmap, struct page *page, int wait)
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/* bitmap runs in to metadata */
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return -EINVAL;
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if (rdev->data_offset + mddev->size*2
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> rdev->sb_offset*2 + bitmap->offset)
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> rdev->sb_start + bitmap->offset)
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/* data runs in to bitmap */
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return -EINVAL;
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} else if (rdev->sb_offset*2 < rdev->data_offset) {
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} else if (rdev->sb_start < rdev->data_offset) {
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/* METADATA BITMAP DATA */
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if (rdev->sb_offset*2
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if (rdev->sb_start
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+ bitmap->offset
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+ page->index*(PAGE_SIZE/512) + size/512
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> rdev->data_offset)
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@ -277,7 +277,7 @@ static int write_sb_page(struct bitmap *bitmap, struct page *page, int wait)
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/* DATA METADATA BITMAP - no problems */
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}
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md_super_write(mddev, rdev,
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(rdev->sb_offset<<1) + bitmap->offset
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rdev->sb_start + bitmap->offset
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+ page->index * (PAGE_SIZE/512),
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size,
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page);
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@ -356,7 +356,7 @@ static inline sector_t calc_dev_sboffset(struct block_device *bdev)
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static sector_t calc_num_sectors(mdk_rdev_t *rdev, unsigned chunk_size)
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{
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sector_t num_sectors = rdev->sb_offset * 2;
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sector_t num_sectors = rdev->sb_start;
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if (chunk_size)
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num_sectors &= ~((sector_t)chunk_size/512 - 1);
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@ -383,7 +383,7 @@ static void free_disk_sb(mdk_rdev_t * rdev)
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put_page(rdev->sb_page);
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rdev->sb_loaded = 0;
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rdev->sb_page = NULL;
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rdev->sb_offset = 0;
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rdev->sb_start = 0;
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rdev->size = 0;
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}
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}
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@ -529,7 +529,7 @@ static int read_disk_sb(mdk_rdev_t * rdev, int size)
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return 0;
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if (!sync_page_io(rdev->bdev, rdev->sb_offset<<1, size, rdev->sb_page, READ))
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if (!sync_page_io(rdev->bdev, rdev->sb_start, size, rdev->sb_page, READ))
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goto fail;
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rdev->sb_loaded = 1;
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return 0;
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@ -666,16 +666,14 @@ static int super_90_load(mdk_rdev_t *rdev, mdk_rdev_t *refdev, int minor_version
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char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE];
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mdp_super_t *sb;
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int ret;
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sector_t sb_offset;
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/*
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* Calculate the position of the superblock,
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* Calculate the position of the superblock (512byte sectors),
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* it's at the end of the disk.
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*
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* It also happens to be a multiple of 4Kb.
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*/
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sb_offset = calc_dev_sboffset(rdev->bdev) / 2;
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rdev->sb_offset = sb_offset;
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rdev->sb_start = calc_dev_sboffset(rdev->bdev);
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ret = read_disk_sb(rdev, MD_SB_BYTES);
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if (ret) return ret;
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@ -1007,10 +1005,10 @@ super_90_rdev_size_change(mdk_rdev_t *rdev, unsigned long long size)
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size *= 2; /* convert to sectors */
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if (rdev->mddev->bitmap_offset)
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return 0; /* can't move bitmap */
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rdev->sb_offset = calc_dev_sboffset(rdev->bdev) / 2;
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if (!size || size > rdev->sb_offset*2)
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size = rdev->sb_offset*2;
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md_super_write(rdev->mddev, rdev, rdev->sb_offset << 1, rdev->sb_size,
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rdev->sb_start = calc_dev_sboffset(rdev->bdev);
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if (!size || size > rdev->sb_start)
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size = rdev->sb_start;
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md_super_write(rdev->mddev, rdev, rdev->sb_start, rdev->sb_size,
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rdev->sb_page);
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md_super_wait(rdev->mddev);
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return size/2; /* kB for sysfs */
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@ -1048,12 +1046,12 @@ static int super_1_load(mdk_rdev_t *rdev, mdk_rdev_t *refdev, int minor_version)
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{
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struct mdp_superblock_1 *sb;
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int ret;
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sector_t sb_offset;
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sector_t sb_start;
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char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE];
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int bmask;
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/*
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* Calculate the position of the superblock.
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* Calculate the position of the superblock in 512byte sectors.
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* It is always aligned to a 4K boundary and
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* depeding on minor_version, it can be:
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* 0: At least 8K, but less than 12K, from end of device
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@ -1062,22 +1060,20 @@ static int super_1_load(mdk_rdev_t *rdev, mdk_rdev_t *refdev, int minor_version)
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*/
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switch(minor_version) {
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case 0:
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sb_offset = rdev->bdev->bd_inode->i_size >> 9;
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sb_offset -= 8*2;
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sb_offset &= ~(sector_t)(4*2-1);
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/* convert from sectors to K */
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sb_offset /= 2;
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sb_start = rdev->bdev->bd_inode->i_size >> 9;
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sb_start -= 8*2;
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sb_start &= ~(sector_t)(4*2-1);
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break;
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case 1:
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sb_offset = 0;
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sb_start = 0;
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break;
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case 2:
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sb_offset = 4;
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sb_start = 8;
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break;
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default:
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return -EINVAL;
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}
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rdev->sb_offset = sb_offset;
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rdev->sb_start = sb_start;
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/* superblock is rarely larger than 1K, but it can be larger,
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* and it is safe to read 4k, so we do that
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@ -1091,7 +1087,7 @@ static int super_1_load(mdk_rdev_t *rdev, mdk_rdev_t *refdev, int minor_version)
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if (sb->magic != cpu_to_le32(MD_SB_MAGIC) ||
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sb->major_version != cpu_to_le32(1) ||
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le32_to_cpu(sb->max_dev) > (4096-256)/2 ||
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le64_to_cpu(sb->super_offset) != (rdev->sb_offset<<1) ||
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le64_to_cpu(sb->super_offset) != rdev->sb_start ||
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(le32_to_cpu(sb->feature_map) & ~MD_FEATURE_ALL) != 0)
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return -EINVAL;
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@ -1127,7 +1123,7 @@ static int super_1_load(mdk_rdev_t *rdev, mdk_rdev_t *refdev, int minor_version)
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rdev->sb_size = (rdev->sb_size | bmask) + 1;
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if (minor_version
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&& rdev->data_offset < sb_offset + (rdev->sb_size/512))
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&& rdev->data_offset < sb_start + (rdev->sb_size/512))
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return -EINVAL;
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if (sb->level == cpu_to_le32(LEVEL_MULTIPATH))
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@ -1163,7 +1159,7 @@ static int super_1_load(mdk_rdev_t *rdev, mdk_rdev_t *refdev, int minor_version)
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if (minor_version)
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rdev->size = ((rdev->bdev->bd_inode->i_size>>9) - le64_to_cpu(sb->data_offset)) / 2;
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else
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rdev->size = rdev->sb_offset;
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rdev->size = rdev->sb_start / 2;
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if (rdev->size < le64_to_cpu(sb->data_size)/2)
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return -EINVAL;
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rdev->size = le64_to_cpu(sb->data_size)/2;
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@ -1350,7 +1346,7 @@ super_1_rdev_size_change(mdk_rdev_t *rdev, unsigned long long size)
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if (size && size < rdev->mddev->size)
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return 0; /* component must fit device */
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size *= 2; /* convert to sectors */
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if (rdev->sb_offset < rdev->data_offset/2) {
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if (rdev->sb_start < rdev->data_offset) {
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/* minor versions 1 and 2; superblock before data */
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max_size = (rdev->bdev->bd_inode->i_size >> 9);
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max_size -= rdev->data_offset;
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@ -1361,19 +1357,19 @@ super_1_rdev_size_change(mdk_rdev_t *rdev, unsigned long long size)
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return 0;
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} else {
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/* minor version 0; superblock after data */
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sector_t sb_offset;
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sb_offset = (rdev->bdev->bd_inode->i_size >> 9) - 8*2;
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sb_offset &= ~(sector_t)(4*2 - 1);
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max_size = rdev->size*2 + sb_offset - rdev->sb_offset*2;
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sector_t sb_start;
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sb_start = (rdev->bdev->bd_inode->i_size >> 9) - 8*2;
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sb_start &= ~(sector_t)(4*2 - 1);
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max_size = rdev->size*2 + sb_start - rdev->sb_start;
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if (!size || size > max_size)
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size = max_size;
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rdev->sb_offset = sb_offset/2;
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rdev->sb_start = sb_start;
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}
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sb = (struct mdp_superblock_1 *) page_address(rdev->sb_page);
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sb->data_size = cpu_to_le64(size);
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sb->super_offset = rdev->sb_offset*2;
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sb->super_offset = rdev->sb_start;
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sb->sb_csum = calc_sb_1_csum(sb);
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md_super_write(rdev->mddev, rdev, rdev->sb_offset << 1, rdev->sb_size,
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md_super_write(rdev->mddev, rdev, rdev->sb_start, rdev->sb_size,
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rdev->sb_page);
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md_super_wait(rdev->mddev);
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return size/2; /* kB for sysfs */
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@ -1810,11 +1806,11 @@ repeat:
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dprintk("%s ", bdevname(rdev->bdev,b));
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if (!test_bit(Faulty, &rdev->flags)) {
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md_super_write(mddev,rdev,
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rdev->sb_offset<<1, rdev->sb_size,
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rdev->sb_start, rdev->sb_size,
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rdev->sb_page);
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dprintk(KERN_INFO "(write) %s's sb offset: %llu\n",
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bdevname(rdev->bdev,b),
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(unsigned long long)rdev->sb_offset);
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(unsigned long long)rdev->sb_start);
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rdev->sb_events = mddev->events;
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} else
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@ -3577,16 +3573,16 @@ static int do_md_run(mddev_t * mddev)
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* We don't want the data to overlap the metadata,
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* Internal Bitmap issues has handled elsewhere.
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*/
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if (rdev->data_offset < rdev->sb_offset) {
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if (rdev->data_offset < rdev->sb_start) {
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if (mddev->size &&
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rdev->data_offset + mddev->size*2
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> rdev->sb_offset*2) {
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> rdev->sb_start) {
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printk("md: %s: data overlaps metadata\n",
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mdname(mddev));
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return -EINVAL;
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}
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} else {
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if (rdev->sb_offset*2 + rdev->sb_size/512
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if (rdev->sb_start + rdev->sb_size/512
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> rdev->data_offset) {
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printk("md: %s: metadata overlaps data\n",
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mdname(mddev));
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@ -4355,9 +4351,9 @@ static int add_new_disk(mddev_t * mddev, mdu_disk_info_t *info)
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if (!mddev->persistent) {
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printk(KERN_INFO "md: nonpersistent superblock ...\n");
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rdev->sb_offset = rdev->bdev->bd_inode->i_size >> BLOCK_SIZE_BITS;
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rdev->sb_start = rdev->bdev->bd_inode->i_size / 512;
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} else
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rdev->sb_offset = calc_dev_sboffset(rdev->bdev) / 2;
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rdev->sb_start = calc_dev_sboffset(rdev->bdev);
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rdev->size = calc_num_sectors(rdev, mddev->chunk_size) / 2;
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err = bind_rdev_to_array(rdev, mddev);
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@ -4424,10 +4420,9 @@ static int hot_add_disk(mddev_t * mddev, dev_t dev)
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}
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if (mddev->persistent)
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rdev->sb_offset = calc_dev_sboffset(rdev->bdev) / 2;
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rdev->sb_start = calc_dev_sboffset(rdev->bdev);
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else
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rdev->sb_offset =
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rdev->bdev->bd_inode->i_size >> BLOCK_SIZE_BITS;
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rdev->sb_start = rdev->bdev->bd_inode->i_size / 512;
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rdev->size = calc_num_sectors(rdev, mddev->chunk_size) / 2;
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@ -4628,7 +4623,7 @@ static int update_size(mddev_t *mddev, sector_t num_sectors)
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* linear and raid0 always use whatever space is available. We can only
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* consider changing this number if no resync or reconstruction is
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* happening, and if the new size is acceptable. It must fit before the
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* sb_offset or, if that is <data_offset, it must fit before the size
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* sb_start or, if that is <data_offset, it must fit before the size
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* of each device. If num_sectors is zero, we find the largest size
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* that fits.
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@ -59,7 +59,7 @@ struct mdk_rdev_s
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int sb_loaded;
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__u64 sb_events;
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sector_t data_offset; /* start of data in array */
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sector_t sb_offset;
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sector_t sb_start; /* offset of the super block (in 512byte sectors) */
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int sb_size; /* bytes in the superblock */
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int preferred_minor; /* autorun support */
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