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md: Fix bitmap offset calculations 

The calculations of bitmap offset is incorrect with respect to bits to bytes
conversion.

Also, remove an irrelevant duplicate message.

Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com>
Signed-off-by: NeilBrown <neilb@suse.de>
This commit is contained in:
Goldwyn Rodrigues 2015-03-24 11:29:05 -05:00 committed by NeilBrown
parent 09dd1af2e0
commit 124eb761ed
1 changed files with 3 additions and 4 deletions
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7
drivers/md/bitmap.c
View File

@ -575,7 +575,9 @@ re_read:
sector_div(bm_blocks,
bitmap->mddev->bitmap_info.chunksize >> 9);
bm_blocks = bm_blocks << 3;
/* bits to bytes */
bm_blocks = ((bm_blocks+7) >> 3) + sizeof(bitmap_super_t);
/* to 4k blocks */
bm_blocks = DIV_ROUND_UP_SECTOR_T(bm_blocks, 4096);
bitmap->mddev->bitmap_info.offset += bitmap->cluster_slot * (bm_blocks << 3);
pr_info("%s:%d bm slot: %d offset: %llu\n", __func__, __LINE__,
@ -672,9 +674,6 @@ out:
goto out_no_sb;
}
bitmap->cluster_slot = md_cluster_ops->slot_number(bitmap->mddev);
pr_info("%s:%d bm slot: %d offset: %llu\n", __func__, __LINE__,
bitmap->cluster_slot,
(unsigned long long)bitmap->mddev->bitmap_info.offset);
goto re_read;
}