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https://github.com/kdave/btrfs-progs
synced 2025-04-29 14:37:56 +00:00
btrfs-progs: convert: move create_image_file_range
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
David Sterba
parent
14e6cbe973
commit
3a62c6845b
233
btrfs-convert.c
233
btrfs-convert.c
@ -406,6 +406,122 @@ fail:
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return ret;
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}
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static int create_image_file_range(struct btrfs_trans_handle *trans,
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struct btrfs_root *root,
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struct cache_tree *used,
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struct btrfs_inode_item *inode,
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u64 ino, u64 bytenr, u64 *ret_len,
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int datacsum)
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{
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struct cache_extent *cache;
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struct btrfs_block_group_cache *bg_cache;
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u64 len = *ret_len;
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u64 disk_bytenr;
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int i;
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int ret;
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BUG_ON(bytenr != round_down(bytenr, root->sectorsize));
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BUG_ON(len != round_down(len, root->sectorsize));
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len = min_t(u64, len, BTRFS_MAX_EXTENT_SIZE);
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/*
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* Skip sb ranges first
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* [0, 1M), [sb_offset(1), +64K), [sb_offset(2), +64K].
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*
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* Or we will insert a hole into current image file, and later
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* migrate block will fail as there is already a file extent.
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*/
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if (bytenr < 1024 * 1024) {
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*ret_len = 1024 * 1024 - bytenr;
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return 0;
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}
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for (i = 1; i < BTRFS_SUPER_MIRROR_MAX; i++) {
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u64 cur = btrfs_sb_offset(i);
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if (bytenr >= cur && bytenr < cur + BTRFS_STRIPE_LEN) {
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*ret_len = cur + BTRFS_STRIPE_LEN - bytenr;
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return 0;
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}
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}
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for (i = 1; i < BTRFS_SUPER_MIRROR_MAX; i++) {
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u64 cur = btrfs_sb_offset(i);
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/*
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* |--reserved--|
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* |----range-------|
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* May still need to go through file extent inserts
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*/
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if (bytenr < cur && bytenr + len >= cur) {
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len = min_t(u64, len, cur - bytenr);
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break;
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}
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/*
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* |--reserved--|
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* |---range---|
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* Drop out, no need to insert anything
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*/
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if (bytenr >= cur && bytenr < cur + BTRFS_STRIPE_LEN) {
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*ret_len = cur + BTRFS_STRIPE_LEN - bytenr;
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return 0;
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}
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}
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cache = search_cache_extent(used, bytenr);
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if (cache) {
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if (cache->start <= bytenr) {
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/*
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* |///////Used///////|
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* |<--insert--->|
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* bytenr
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*/
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len = min_t(u64, len, cache->start + cache->size -
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bytenr);
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disk_bytenr = bytenr;
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} else {
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/*
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* |//Used//|
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* |<-insert-->|
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* bytenr
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*/
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len = min(len, cache->start - bytenr);
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disk_bytenr = 0;
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datacsum = 0;
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}
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} else {
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/*
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* |//Used//| |EOF
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* |<-insert-->|
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* bytenr
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*/
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disk_bytenr = 0;
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datacsum = 0;
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}
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if (disk_bytenr) {
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/* Check if the range is in a data block group */
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bg_cache = btrfs_lookup_block_group(root->fs_info, bytenr);
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if (!bg_cache)
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return -ENOENT;
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if (!(bg_cache->flags & BTRFS_BLOCK_GROUP_DATA))
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return -EINVAL;
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/* The extent should never cross block group boundary */
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len = min_t(u64, len, bg_cache->key.objectid +
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bg_cache->key.offset - bytenr);
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}
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BUG_ON(len != round_down(len, root->sectorsize));
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ret = btrfs_record_file_extent(trans, root, ino, inode, bytenr,
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disk_bytenr, len);
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if (ret < 0)
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return ret;
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if (datacsum)
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ret = csum_disk_extent(trans, root, bytenr, len);
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*ret_len = len;
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return ret;
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}
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/*
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* Open Ext2fs in readonly mode, read block allocation bitmap and
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* inode bitmap into memory.
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@ -1255,123 +1371,6 @@ static int ext2_copy_inodes(struct btrfs_convert_context *cctx,
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return ret;
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}
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static int create_image_file_range(struct btrfs_trans_handle *trans,
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struct btrfs_root *root,
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struct cache_tree *used,
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struct btrfs_inode_item *inode,
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u64 ino, u64 bytenr, u64 *ret_len,
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int datacsum)
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{
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struct cache_extent *cache;
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struct btrfs_block_group_cache *bg_cache;
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u64 len = *ret_len;
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u64 disk_bytenr;
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int i;
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int ret;
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BUG_ON(bytenr != round_down(bytenr, root->sectorsize));
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BUG_ON(len != round_down(len, root->sectorsize));
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len = min_t(u64, len, BTRFS_MAX_EXTENT_SIZE);
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/*
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* Skip sb ranges first
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* [0, 1M), [sb_offset(1), +64K), [sb_offset(2), +64K].
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*
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* Or we will insert a hole into current image file, and later
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* migrate block will fail as there is already a file extent.
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*/
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if (bytenr < 1024 * 1024) {
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*ret_len = 1024 * 1024 - bytenr;
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return 0;
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}
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for (i = 1; i < BTRFS_SUPER_MIRROR_MAX; i++) {
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u64 cur = btrfs_sb_offset(i);
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if (bytenr >= cur && bytenr < cur + BTRFS_STRIPE_LEN) {
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*ret_len = cur + BTRFS_STRIPE_LEN - bytenr;
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return 0;
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}
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}
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for (i = 1; i < BTRFS_SUPER_MIRROR_MAX; i++) {
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u64 cur = btrfs_sb_offset(i);
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/*
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* |--reserved--|
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* |----range-------|
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* May still need to go through file extent inserts
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*/
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if (bytenr < cur && bytenr + len >= cur) {
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len = min_t(u64, len, cur - bytenr);
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break;
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}
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/*
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* |--reserved--|
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* |---range---|
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* Drop out, no need to insert anything
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*/
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if (bytenr >= cur && bytenr < cur + BTRFS_STRIPE_LEN) {
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*ret_len = cur + BTRFS_STRIPE_LEN - bytenr;
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return 0;
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}
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}
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cache = search_cache_extent(used, bytenr);
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if (cache) {
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if (cache->start <= bytenr) {
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/*
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* |///////Used///////|
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* |<--insert--->|
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* bytenr
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*/
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len = min_t(u64, len, cache->start + cache->size -
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bytenr);
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disk_bytenr = bytenr;
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} else {
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/*
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* |//Used//|
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* |<-insert-->|
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* bytenr
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*/
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len = min(len, cache->start - bytenr);
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disk_bytenr = 0;
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datacsum = 0;
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}
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} else {
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/*
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* |//Used//| |EOF
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* |<-insert-->|
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* bytenr
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*/
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disk_bytenr = 0;
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datacsum = 0;
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}
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if (disk_bytenr) {
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/* Check if the range is in a data block group */
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bg_cache = btrfs_lookup_block_group(root->fs_info, bytenr);
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if (!bg_cache)
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return -ENOENT;
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if (!(bg_cache->flags & BTRFS_BLOCK_GROUP_DATA))
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return -EINVAL;
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/* The extent should never cross block group boundary */
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len = min_t(u64, len, bg_cache->key.objectid +
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bg_cache->key.offset - bytenr);
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}
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BUG_ON(len != round_down(len, root->sectorsize));
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ret = btrfs_record_file_extent(trans, root, ino, inode, bytenr,
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disk_bytenr, len);
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if (ret < 0)
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return ret;
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if (datacsum)
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ret = csum_disk_extent(trans, root, bytenr, len);
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*ret_len = len;
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return ret;
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}
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/*
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* Relocate old fs data in one reserved ranges
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*
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