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Btrfs: dev-replace: skip prealloc extents when copy nocow pages
It doens't make sense to process prealloc extents as pages will be filled with zero when reading prealloc extents. Signed-off-by: Liu Bo <bo.li.liu@oracle.com> Reviewed-by: Filipe Manana <fdmanana@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
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@ -4480,7 +4480,8 @@ static int check_extent_to_block(struct btrfs_inode *inode, u64 start, u64 len,
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* move on to the next inode.
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*/
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if (em->block_start > logical ||
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em->block_start + em->block_len < logical + len) {
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em->block_start + em->block_len < logical + len ||
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test_bit(EXTENT_FLAG_PREALLOC, &em->flags)) {
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free_extent_map(em);
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ret = 1;
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goto out_unlock;
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