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btrfs: Load only necessary csums into list in scrub
We need not load csum of whole strip in scrub because strip is trimed before use, it is to say, what we really need to calculate csum is data between [extent_logical, extent_len). This patch changed to use above segment for btrfs_lookup_csums_range() in scrub_stripe() Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com> Signed-off-by: Chris Mason <clm@fb.com>
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1 changed files with 5 additions and 3 deletions
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@ -3254,9 +3254,11 @@ static noinline_for_stack int scrub_stripe(struct scrub_ctx *sctx,
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&extent_dev,
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&extent_mirror_num);
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ret = btrfs_lookup_csums_range(csum_root, logical,
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logical + map->stripe_len - 1,
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&sctx->csum_list, 1);
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ret = btrfs_lookup_csums_range(csum_root,
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extent_logical,
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extent_logical +
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extent_len - 1,
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&sctx->csum_list, 1);
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if (ret)
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goto out;
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