Btrfs: Fix usage of struct extent_map->orig_start
This makes sure the orig_start field in struct extent_map gets set everywhere the extent_map structs are created or modified. Signed-off-by: Chris Mason <chris.mason@oracle.com>
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@ -244,16 +244,17 @@ int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
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split->start = start + len;
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split->start = start + len;
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split->len = em->start + em->len - (start + len);
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split->len = em->start + em->len - (start + len);
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split->orig_start = em->orig_start;
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split->bdev = em->bdev;
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split->bdev = em->bdev;
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split->flags = flags;
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split->flags = flags;
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if (compressed) {
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if (compressed) {
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split->block_len = em->block_len;
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split->block_len = em->block_len;
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split->block_start = em->block_start;
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split->block_start = em->block_start;
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split->orig_start = em->orig_start;
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} else {
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} else {
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split->block_len = split->len;
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split->block_len = split->len;
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split->block_start = em->block_start + diff;
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split->block_start = em->block_start + diff;
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split->orig_start = split->start;
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}
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}
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ret = add_extent_mapping(em_tree, split);
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ret = add_extent_mapping(em_tree, split);
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@ -610,6 +610,7 @@ static noinline int submit_compressed_extents(struct inode *inode,
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em = alloc_extent_map(GFP_NOFS);
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em = alloc_extent_map(GFP_NOFS);
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em->start = async_extent->start;
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em->start = async_extent->start;
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em->len = async_extent->ram_size;
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em->len = async_extent->ram_size;
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em->orig_start = em->start;
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em->block_start = ins.objectid;
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em->block_start = ins.objectid;
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em->block_len = ins.offset;
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em->block_len = ins.offset;
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@ -743,6 +744,7 @@ static noinline int cow_file_range(struct inode *inode,
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}
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}
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em = alloc_extent_map(GFP_NOFS);
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em = alloc_extent_map(GFP_NOFS);
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em->start = start;
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em->start = start;
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em->orig_start = em->start;
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ram_size = ins.offset;
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ram_size = ins.offset;
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em->len = ins.offset;
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em->len = ins.offset;
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@ -1057,6 +1059,7 @@ out_check:
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em_tree = &BTRFS_I(inode)->extent_tree;
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em_tree = &BTRFS_I(inode)->extent_tree;
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em = alloc_extent_map(GFP_NOFS);
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em = alloc_extent_map(GFP_NOFS);
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em->start = cur_offset;
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em->start = cur_offset;
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em->orig_start = em->start;
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em->len = num_bytes;
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em->len = num_bytes;
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em->block_len = num_bytes;
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em->block_len = num_bytes;
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em->block_start = disk_bytenr;
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em->block_start = disk_bytenr;
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@ -3876,6 +3879,7 @@ again:
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}
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}
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em->bdev = root->fs_info->fs_devices->latest_bdev;
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em->bdev = root->fs_info->fs_devices->latest_bdev;
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em->start = EXTENT_MAP_HOLE;
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em->start = EXTENT_MAP_HOLE;
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em->orig_start = EXTENT_MAP_HOLE;
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em->len = (u64)-1;
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em->len = (u64)-1;
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em->block_len = (u64)-1;
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em->block_len = (u64)-1;
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