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SUSE:SLE-12-SP3:GA
btrfsprogs.11414
0023-btrfs-progs-Cleanup-old-btrfs-convert.patch
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File 0023-btrfs-progs-Cleanup-old-btrfs-convert.patch of Package btrfsprogs.11414
From: Qu Wenruo <quwenruo@cn.fujitsu.com> Date: Fri, 29 Jan 2016 13:03:32 +0800 Subject: btrfs-progs: Cleanup old btrfs-convert Git-commit: cfdcb4fa616cb7cef3f11e266ac57adba9079ac0 Patch-mainline: v4.6 References: bsc#1042369 Cleanup all the old btrfs-convert facilities, including: 1) btrfs_convert_operations->alloc/free/test_extents* No need to do non-standard extent allocation. After init_btrfs() everything can be done by normal routine. Now only 4 functions are needed in btrfs_convert_operations. 1) open_fs 2) read_used_space 3) copy_inodes 4) close_fs 2) fs_info->extent_ops Same as above. 3) Old init_btrfs(), create_image(), create_file_image_range() Replaced with newer and cleaner one. Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com> Signed-off-by: David Sterba <dsterba@suse.com> --- btrfs-convert.c | 1425 ++----------------------------------------------------- ctree.h | 8 - extent-tree.c | 17 - 3 files changed, 52 insertions(+), 1398 deletions(-) diff --git a/btrfs-convert.c b/btrfs-convert.c index ba6a7df..6f9a2fb 100644 --- a/btrfs-convert.c +++ b/btrfs-convert.c @@ -312,90 +274,6 @@ static void ext2_close_fs(struct btrfs_convert_context *cctx) ext2fs_close(cctx->fs_data); } -static int ext2_alloc_block(struct btrfs_convert_context *cctx, - u64 goal, u64 *block_ret) -{ - ext2_filsys fs = cctx->fs_data; - blk_t block; - - if (!ext2fs_new_block(fs, goal, NULL, &block)) { - ext2fs_fast_mark_block_bitmap(fs->block_map, block); - *block_ret = block; - return 0; - } - return -ENOSPC; -} - -static int ext2_alloc_block_range(struct btrfs_convert_context *cctx, u64 goal, - int num, u64 *block_ret) -{ - ext2_filsys fs = cctx->fs_data; - blk_t block; - ext2fs_block_bitmap bitmap = fs->block_map; - blk_t start = ext2fs_get_block_bitmap_start(bitmap); - blk_t end = ext2fs_get_block_bitmap_end(bitmap); - - for (block = max_t(u64, goal, start); block + num < end; block++) { - if (ext2fs_fast_test_block_bitmap_range(bitmap, block, num)) { - ext2fs_fast_mark_block_bitmap_range(bitmap, block, - num); - *block_ret = block; - return 0; - } - } - return -ENOSPC; -} - -static void ext2_free_block(struct btrfs_convert_context *cctx, u64 block) -{ - ext2_filsys fs = cctx->fs_data; - - BUG_ON(block != (blk_t)block); - ext2fs_fast_unmark_block_bitmap(fs->block_map, block); -} - -static void ext2_free_block_range(struct btrfs_convert_context *cctx, u64 block, int num) -{ - ext2_filsys fs = cctx->fs_data; - - BUG_ON(block != (blk_t)block); - ext2fs_fast_unmark_block_bitmap_range(fs->block_map, block, num); -} - -static int cache_free_extents(struct btrfs_root *root, - struct btrfs_convert_context *cctx) - -{ - int i, ret = 0; - blk_t block; - u64 bytenr; - u64 blocksize = cctx->blocksize; - - block = cctx->first_data_block; - for (; block < cctx->block_count; block++) { - if (convert_test_block(cctx, block)) - continue; - bytenr = block * blocksize; - ret = set_extent_dirty(&root->fs_info->free_space_cache, - bytenr, bytenr + blocksize - 1, 0); - BUG_ON(ret); - } - - for (i = 0; i < BTRFS_SUPER_MIRROR_MAX; i++) { - bytenr = btrfs_sb_offset(i); - bytenr &= ~((u64)BTRFS_STRIPE_LEN - 1); - if (bytenr >= blocksize * cctx->block_count) - break; - clear_extent_dirty(&root->fs_info->free_space_cache, bytenr, - bytenr + BTRFS_STRIPE_LEN - 1, 0); - } - - clear_extent_dirty(&root->fs_info->free_space_cache, - 0, BTRFS_SUPER_INFO_OFFSET - 1, 0); - - return 0; -} - static int custom_alloc_extent(struct btrfs_root *root, u64 num_bytes, u64 hint_byte, struct btrfs_key *ins, int metadata) @@ -474,17 +290,6 @@ static int intersect_with_sb(u64 bytenr, u64 num_bytes) return 0; } -static int custom_free_extent(struct btrfs_root *root, u64 bytenr, - u64 num_bytes) -{ - return intersect_with_sb(bytenr, num_bytes); -} - -static struct btrfs_extent_ops extent_ops = { - .alloc_extent = custom_alloc_extent, - .free_extent = custom_free_extent, -}; - static int convert_insert_dirent(struct btrfs_trans_handle *trans, struct btrfs_root *root, const char *name, size_t name_len, @@ -1388,29 +1193,6 @@ static int copy_single_inode(struct btrfs_trans_handle *trans, return btrfs_insert_inode(trans, root, objectid, &btrfs_inode); } -static int copy_disk_extent(struct btrfs_root *root, u64 dst_bytenr, - u64 src_bytenr, u32 num_bytes) -{ - int ret; - char *buffer; - struct btrfs_fs_devices *fs_devs = root->fs_info->fs_devices; - - buffer = malloc(num_bytes); - if (!buffer) - return -ENOMEM; - ret = pread(fs_devs->latest_bdev, buffer, num_bytes, src_bytenr); - if (ret != num_bytes) - goto fail; - ret = pwrite(fs_devs->latest_bdev, buffer, num_bytes, dst_bytenr); - if (ret != num_bytes) - goto fail; - ret = 0; -fail: - free(buffer); - if (ret > 0) - ret = -1; - return ret; -} /* * scan ext2's inode bitmap and copy all used inodes. */ @@ -1470,255 +1252,7 @@ static int ext2_copy_inodes(struct btrfs_convert_context *cctx, return ret; } -static int ext2_test_block(struct btrfs_convert_context *cctx, u64 block) -{ - ext2_filsys ext2_fs = cctx->fs_data; - - BUG_ON(block != (u32)block); - return ext2fs_fast_test_block_bitmap(ext2_fs->block_map, block); -} - -/* - * Construct a range of ext2fs image file. - * scan block allocation bitmap, find all blocks used by the ext2fs - * in this range and create file extents that point to these blocks. - * - * Note: Before calling the function, no file extent points to blocks - * in this range - */ static int create_image_file_range(struct btrfs_trans_handle *trans, - struct btrfs_root *root, u64 objectid, - struct btrfs_inode_item *inode, - u64 start_byte, u64 end_byte, - struct btrfs_convert_context *cctx, int datacsum) -{ - u32 blocksize = cctx->blocksize; - u32 block = start_byte / blocksize; - u32 last_block = (end_byte + blocksize - 1) / blocksize; - int ret = 0; - struct blk_iterate_data data; - - init_blk_iterate_data(&data, trans, root, inode, objectid, datacsum); - data.first_block = block; - - for (; start_byte < end_byte; block++, start_byte += blocksize) { - if (!convert_test_block(cctx, block)) - continue; - ret = block_iterate_proc(block, block, &data); - if (ret < 0) - goto fail; - } - if (data.num_blocks > 0) { - ret = record_file_blocks(&data, data.first_block, - data.disk_block, data.num_blocks); - if (ret) - goto fail; - data.first_block += data.num_blocks; - } - if (last_block > data.first_block) { - ret = record_file_blocks(&data, data.first_block, 0, - last_block - data.first_block); - if (ret) - goto fail; - } -fail: - return ret; -} - -/* - * Create the fs image file. - */ -static int create_image(struct btrfs_convert_context *cctx, - struct btrfs_root *root, const char *name, int datacsum) -{ - int ret; - struct btrfs_key key; - struct btrfs_key location; - struct btrfs_path path; - struct btrfs_inode_item btrfs_inode; - struct btrfs_inode_item *inode_item; - struct extent_buffer *leaf; - struct btrfs_fs_info *fs_info = root->fs_info; - struct btrfs_root *extent_root = fs_info->extent_root; - struct btrfs_trans_handle *trans; - struct btrfs_extent_item *ei; - struct btrfs_extent_inline_ref *iref; - struct btrfs_extent_data_ref *dref; - u64 bytenr; - u64 num_bytes; - u64 objectid; - u64 last_byte; - u64 first_free; - u64 total_bytes; - u64 flags = BTRFS_INODE_READONLY; - u32 sectorsize = root->sectorsize; - - total_bytes = btrfs_super_total_bytes(fs_info->super_copy); - first_free = BTRFS_SUPER_INFO_OFFSET + sectorsize * 2 - 1; - first_free &= ~((u64)sectorsize - 1); - if (!datacsum) - flags |= BTRFS_INODE_NODATASUM; - - memset(&btrfs_inode, 0, sizeof(btrfs_inode)); - btrfs_set_stack_inode_generation(&btrfs_inode, 1); - btrfs_set_stack_inode_size(&btrfs_inode, total_bytes); - btrfs_set_stack_inode_nlink(&btrfs_inode, 1); - btrfs_set_stack_inode_nbytes(&btrfs_inode, 0); - btrfs_set_stack_inode_mode(&btrfs_inode, S_IFREG | 0400); - btrfs_set_stack_inode_flags(&btrfs_inode, flags); - btrfs_init_path(&path); - trans = btrfs_start_transaction(root, 1); - BUG_ON(!trans); - - objectid = btrfs_root_dirid(&root->root_item); - ret = btrfs_find_free_objectid(trans, root, objectid, &objectid); - if (ret) - goto fail; - - /* - * copy blocks covered by extent #0 to new positions. extent #0 is - * special, we can't rely on relocate_extents_range to relocate it. - */ - for (last_byte = 0; last_byte < first_free; last_byte += sectorsize) { - ret = custom_alloc_extent(root, sectorsize, 0, &key, 0); - if (ret) - goto fail; - ret = copy_disk_extent(root, key.objectid, last_byte, - sectorsize); - if (ret) - goto fail; - ret = btrfs_record_file_extent(trans, root, objectid, - &btrfs_inode, last_byte, - key.objectid, sectorsize); - if (ret) - goto fail; - if (datacsum) { - ret = csum_disk_extent(trans, root, key.objectid, - sectorsize); - if (ret) - goto fail; - } - } - - while(1) { - key.objectid = last_byte; - key.offset = 0; - btrfs_set_key_type(&key, BTRFS_EXTENT_ITEM_KEY); - ret = btrfs_search_slot(trans, fs_info->extent_root, - &key, &path, 0, 0); - if (ret < 0) - goto fail; -next: - leaf = path.nodes[0]; - if (path.slots[0] >= btrfs_header_nritems(leaf)) { - ret = btrfs_next_leaf(extent_root, &path); - if (ret < 0) - goto fail; - if (ret > 0) - break; - leaf = path.nodes[0]; - } - btrfs_item_key_to_cpu(leaf, &key, path.slots[0]); - if (last_byte > key.objectid || - key.type != BTRFS_EXTENT_ITEM_KEY) { - path.slots[0]++; - goto next; - } - - bytenr = key.objectid; - num_bytes = key.offset; - ei = btrfs_item_ptr(leaf, path.slots[0], - struct btrfs_extent_item); - if (!(btrfs_extent_flags(leaf, ei) & BTRFS_EXTENT_FLAG_DATA)) { - path.slots[0]++; - goto next; - } - - BUG_ON(btrfs_item_size_nr(leaf, path.slots[0]) != sizeof(*ei) + - btrfs_extent_inline_ref_size(BTRFS_EXTENT_DATA_REF_KEY)); - - iref = (struct btrfs_extent_inline_ref *)(ei + 1); - key.type = btrfs_extent_inline_ref_type(leaf, iref); - BUG_ON(key.type != BTRFS_EXTENT_DATA_REF_KEY); - dref = (struct btrfs_extent_data_ref *)(&iref->offset); - if (btrfs_extent_data_ref_root(leaf, dref) != - BTRFS_FS_TREE_OBJECTID) { - path.slots[0]++; - goto next; - } - - if (bytenr > last_byte) { - ret = create_image_file_range(trans, root, objectid, - &btrfs_inode, last_byte, - bytenr, cctx, - datacsum); - if (ret) - goto fail; - } - ret = btrfs_record_file_extent(trans, root, objectid, - &btrfs_inode, bytenr, bytenr, - num_bytes); - if (ret) - goto fail; - last_byte = bytenr + num_bytes; - btrfs_release_path(&path); - - if (trans->blocks_used >= 4096) { - ret = btrfs_commit_transaction(trans, root); - BUG_ON(ret); - trans = btrfs_start_transaction(root, 1); - BUG_ON(!trans); - } - } - btrfs_release_path(&path); - if (total_bytes > last_byte) { - ret = create_image_file_range(trans, root, objectid, - &btrfs_inode, last_byte, - total_bytes, cctx, - datacsum); - if (ret) - goto fail; - } - - ret = btrfs_insert_inode(trans, root, objectid, &btrfs_inode); - if (ret) - goto fail; - - location.objectid = objectid; - location.offset = 0; - btrfs_set_key_type(&location, BTRFS_INODE_ITEM_KEY); - ret = btrfs_insert_dir_item(trans, root, name, strlen(name), - btrfs_root_dirid(&root->root_item), - &location, BTRFS_FT_REG_FILE, objectid); - if (ret) - goto fail; - ret = btrfs_insert_inode_ref(trans, root, name, strlen(name), - objectid, - btrfs_root_dirid(&root->root_item), - objectid); - if (ret) - goto fail; - location.objectid = btrfs_root_dirid(&root->root_item); - location.offset = 0; - btrfs_set_key_type(&location, BTRFS_INODE_ITEM_KEY); - ret = btrfs_lookup_inode(trans, root, &path, &location, 1); - if (ret) - goto fail; - leaf = path.nodes[0]; - inode_item = btrfs_item_ptr(leaf, path.slots[0], - struct btrfs_inode_item); - btrfs_set_inode_size(leaf, inode_item, strlen(name) * 2 + - btrfs_inode_size(leaf, inode_item)); - btrfs_mark_buffer_dirty(leaf); - btrfs_release_path(&path); - ret = btrfs_commit_transaction(trans, root); - BUG_ON(ret); -fail: - btrfs_release_path(&path); - return ret; -} - -static int create_image_file_range_v2(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct cache_tree *used, struct btrfs_inode_item *inode, @@ -1917,7 +1451,7 @@ static int wipe_reserved_ranges(struct cache_tree *tree, u64 min_stripe_size, * This is completely fs independent as we have cctx->used, only * need to create file extents pointing to all the positions. */ -static int create_image_v2(struct btrfs_root *root, +static int create_image(struct btrfs_root *root, struct btrfs_mkfs_config *cfg, struct btrfs_convert_context *cctx, int fd, u64 size, char *name, int datacsum) @@ -1984,14 +1518,14 @@ static int create_image_v2(struct btrfs_root *root, goto out; /* - * Start from 1M, as 0~1M is reserved, and create_image_file_range_v2() + * Start from 1M, as 0~1M is reserved, and create_image_file_range() * can't handle bytenr 0(will consider it as a hole) */ cur = 1024 * 1024; while (cur < size) { u64 len = size - cur; - ret = create_image_file_range_v2(trans, root, &used_tmp, + ret = create_image_file_range(trans, root, &used_tmp, &buf, ino, cur, &len, datacsum); if (ret < 0) goto out; @@ -2121,147 +1655,24 @@ fail: return new_root; } -static int create_chunk_mapping(struct btrfs_trans_handle *trans, - struct btrfs_root *root) +static int create_subvol(struct btrfs_trans_handle *trans, + struct btrfs_root *root, u64 root_objectid) { - struct btrfs_fs_info *info = root->fs_info; - struct btrfs_root *chunk_root = info->chunk_root; - struct btrfs_root *extent_root = info->extent_root; - struct btrfs_device *device; - struct btrfs_block_group_cache *cache; - struct btrfs_dev_extent *extent; - struct extent_buffer *leaf; - struct btrfs_chunk chunk; + struct extent_buffer *tmp; + struct btrfs_root *new_root; struct btrfs_key key; - struct btrfs_path path; - u64 cur_start; - u64 total_bytes; - u64 chunk_objectid; + struct btrfs_root_item root_item; int ret; - btrfs_init_path(&path); - - total_bytes = btrfs_super_total_bytes(root->fs_info->super_copy); - chunk_objectid = BTRFS_FIRST_CHUNK_TREE_OBJECTID; + ret = btrfs_copy_root(trans, root, root->node, &tmp, + root_objectid); + BUG_ON(ret); - BUG_ON(list_empty(&info->fs_devices->devices)); - device = list_entry(info->fs_devices->devices.next, - struct btrfs_device, dev_list); - BUG_ON(device->devid != info->fs_devices->latest_devid); - - /* delete device extent created by make_btrfs */ - key.objectid = device->devid; - key.offset = 0; - key.type = BTRFS_DEV_EXTENT_KEY; - ret = btrfs_search_slot(trans, device->dev_root, &key, &path, -1, 1); - if (ret < 0) - goto err; - - BUG_ON(ret > 0); - ret = btrfs_del_item(trans, device->dev_root, &path); - if (ret) - goto err; - btrfs_release_path(&path); - - /* delete chunk item created by make_btrfs */ - key.objectid = chunk_objectid; - key.offset = 0; - key.type = BTRFS_CHUNK_ITEM_KEY; - ret = btrfs_search_slot(trans, chunk_root, &key, &path, -1, 1); - if (ret < 0) - goto err; - - BUG_ON(ret > 0); - ret = btrfs_del_item(trans, chunk_root, &path); - if (ret) - goto err; - btrfs_release_path(&path); - - /* for each block group, create device extent and chunk item */ - cur_start = 0; - while (cur_start < total_bytes) { - cache = btrfs_lookup_block_group(root->fs_info, cur_start); - BUG_ON(!cache); - - /* insert device extent */ - key.objectid = device->devid; - key.offset = cache->key.objectid; - key.type = BTRFS_DEV_EXTENT_KEY; - ret = btrfs_insert_empty_item(trans, device->dev_root, &path, - &key, sizeof(*extent)); - if (ret) - goto err; - - leaf = path.nodes[0]; - extent = btrfs_item_ptr(leaf, path.slots[0], - struct btrfs_dev_extent); - - btrfs_set_dev_extent_chunk_tree(leaf, extent, - chunk_root->root_key.objectid); - btrfs_set_dev_extent_chunk_objectid(leaf, extent, - chunk_objectid); - btrfs_set_dev_extent_chunk_offset(leaf, extent, - cache->key.objectid); - btrfs_set_dev_extent_length(leaf, extent, cache->key.offset); - write_extent_buffer(leaf, root->fs_info->chunk_tree_uuid, - (unsigned long)btrfs_dev_extent_chunk_tree_uuid(extent), - BTRFS_UUID_SIZE); - btrfs_mark_buffer_dirty(leaf); - btrfs_release_path(&path); - - /* insert chunk item */ - btrfs_set_stack_chunk_length(&chunk, cache->key.offset); - btrfs_set_stack_chunk_owner(&chunk, - extent_root->root_key.objectid); - btrfs_set_stack_chunk_stripe_len(&chunk, BTRFS_STRIPE_LEN); - btrfs_set_stack_chunk_type(&chunk, cache->flags); - btrfs_set_stack_chunk_io_align(&chunk, device->io_align); - btrfs_set_stack_chunk_io_width(&chunk, device->io_width); - btrfs_set_stack_chunk_sector_size(&chunk, device->sector_size); - btrfs_set_stack_chunk_num_stripes(&chunk, 1); - btrfs_set_stack_chunk_sub_stripes(&chunk, 0); - btrfs_set_stack_stripe_devid(&chunk.stripe, device->devid); - btrfs_set_stack_stripe_offset(&chunk.stripe, - cache->key.objectid); - memcpy(&chunk.stripe.dev_uuid, device->uuid, BTRFS_UUID_SIZE); - - key.objectid = chunk_objectid; - key.offset = cache->key.objectid; - key.type = BTRFS_CHUNK_ITEM_KEY; - - ret = btrfs_insert_item(trans, chunk_root, &key, &chunk, - btrfs_chunk_item_size(1)); - if (ret) - goto err; - - cur_start = cache->key.objectid + cache->key.offset; - } - - device->bytes_used = total_bytes; - ret = btrfs_update_device(trans, device); -err: - btrfs_release_path(&path); - return ret; -} - -static int create_subvol(struct btrfs_trans_handle *trans, - struct btrfs_root *root, u64 root_objectid) -{ - struct extent_buffer *tmp; - struct btrfs_root *new_root; - struct btrfs_key key; - struct btrfs_root_item root_item; - int ret; - - ret = btrfs_copy_root(trans, root, root->node, &tmp, - root_objectid); - BUG_ON(ret); - - memcpy(&root_item, &root->root_item, sizeof(root_item)); - btrfs_set_root_bytenr(&root_item, tmp->start); - btrfs_set_root_level(&root_item, btrfs_header_level(tmp)); - btrfs_set_root_generation(&root_item, trans->transid); - free_extent_buffer(tmp); + memcpy(&root_item, &root->root_item, sizeof(root_item)); + btrfs_set_root_bytenr(&root_item, tmp->start); + btrfs_set_root_level(&root_item, btrfs_header_level(tmp)); + btrfs_set_root_generation(&root_item, trans->transid); + free_extent_buffer(tmp); key.objectid = root_objectid; key.type = BTRFS_ROOT_ITEM_KEY; @@ -2280,7 +1691,7 @@ static int create_subvol(struct btrfs_trans_handle *trans, } /* - * New make_btrfs_v2() has handle system and meta chunks quite well. + * New make_btrfs() has handle system and meta chunks quite well. * So only need to add remaining data chunks. */ static int make_convert_data_block_groups(struct btrfs_trans_handle *trans, @@ -2340,7 +1751,7 @@ static int make_convert_data_block_groups(struct btrfs_trans_handle *trans, * (XXX: Not need again?) * But the convert image subvolume is *NOT* linked to fs tree yet. */ -static int init_btrfs_v2(struct btrfs_mkfs_config *cfg, struct btrfs_root *root, +static int init_btrfs(struct btrfs_mkfs_config *cfg, struct btrfs_root *root, struct btrfs_convert_context *cctx, int datacsum, int packing, int noxattr) { @@ -2399,63 +1810,6 @@ err: return ret; } -static int init_btrfs(struct btrfs_root *root) -{ - int ret; - struct btrfs_key location; - struct btrfs_trans_handle *trans; - struct btrfs_fs_info *fs_info = root->fs_info; - struct extent_buffer *tmp; - - trans = btrfs_start_transaction(root, 1); - BUG_ON(!trans); - ret = btrfs_make_block_groups(trans, root); - if (ret) - goto err; - ret = btrfs_fix_block_accounting(trans, root); - if (ret) - goto err; - ret = create_chunk_mapping(trans, root); - if (ret) - goto err; - ret = btrfs_make_root_dir(trans, fs_info->tree_root, - BTRFS_ROOT_TREE_DIR_OBJECTID); - if (ret) - goto err; - memcpy(&location, &root->root_key, sizeof(location)); - location.offset = (u64)-1; - ret = btrfs_insert_dir_item(trans, fs_info->tree_root, "default", 7, - btrfs_super_root_dir(fs_info->super_copy), - &location, BTRFS_FT_DIR, 0); - if (ret) - goto err; - ret = btrfs_insert_inode_ref(trans, fs_info->tree_root, "default", 7, - location.objectid, - btrfs_super_root_dir(fs_info->super_copy), 0); - if (ret) - goto err; - btrfs_set_root_dirid(&fs_info->fs_root->root_item, - BTRFS_FIRST_FREE_OBJECTID); - - /* subvol for fs image file */ - ret = create_subvol(trans, root, CONV_IMAGE_SUBVOL_OBJECTID); - BUG_ON(ret); - /* subvol for data relocation */ - ret = create_subvol(trans, root, BTRFS_DATA_RELOC_TREE_OBJECTID); - BUG_ON(ret); - - extent_buffer_get(fs_info->csum_root->node); - ret = __btrfs_cow_block(trans, fs_info->csum_root, - fs_info->csum_root->node, NULL, 0, &tmp, 0, 0); - BUG_ON(ret); - free_extent_buffer(tmp); - - ret = btrfs_commit_transaction(trans, root); - BUG_ON(ret); -err: - return ret; -} - /* * Migrate super block to its default position and zero 0 ~ 16k */ @@ -2498,515 +1852,54 @@ static int migrate_super_block(int fd, u64 old_bytenr, u32 sectorsize) ret = pwrite(fd, buf->data, len, bytenr); if (ret != len) { fprintf(stderr, "unable to zero fill device\n"); - break; - } - bytenr += len; - } - ret = 0; - fsync(fd); -fail: - free(buf); - if (ret > 0) - ret = -1; - return ret; -} - -static int prepare_system_chunk_sb(struct btrfs_super_block *super) -{ - struct btrfs_chunk *chunk; - struct btrfs_disk_key *key; - u32 sectorsize = btrfs_super_sectorsize(super); - - key = (struct btrfs_disk_key *)(super->sys_chunk_array); - chunk = (struct btrfs_chunk *)(super->sys_chunk_array + - sizeof(struct btrfs_disk_key)); - - btrfs_set_disk_key_objectid(key, BTRFS_FIRST_CHUNK_TREE_OBJECTID); - btrfs_set_disk_key_type(key, BTRFS_CHUNK_ITEM_KEY); - btrfs_set_disk_key_offset(key, 0); - - btrfs_set_stack_chunk_length(chunk, btrfs_super_total_bytes(super)); - btrfs_set_stack_chunk_owner(chunk, BTRFS_EXTENT_TREE_OBJECTID); - btrfs_set_stack_chunk_stripe_len(chunk, BTRFS_STRIPE_LEN); - btrfs_set_stack_chunk_type(chunk, BTRFS_BLOCK_GROUP_SYSTEM); - btrfs_set_stack_chunk_io_align(chunk, sectorsize); - btrfs_set_stack_chunk_io_width(chunk, sectorsize); - btrfs_set_stack_chunk_sector_size(chunk, sectorsize); - btrfs_set_stack_chunk_num_stripes(chunk, 1); - btrfs_set_stack_chunk_sub_stripes(chunk, 0); - chunk->stripe.devid = super->dev_item.devid; - btrfs_set_stack_stripe_offset(&chunk->stripe, 0); - memcpy(chunk->stripe.dev_uuid, super->dev_item.uuid, BTRFS_UUID_SIZE); - btrfs_set_super_sys_array_size(super, sizeof(*key) + sizeof(*chunk)); - return 0; -} - -static int prepare_system_chunk(int fd, u64 sb_bytenr) -{ - int ret; - struct extent_buffer *buf; - struct btrfs_super_block *super; - - BUG_ON(BTRFS_SUPER_INFO_SIZE < sizeof(*super)); - buf = malloc(sizeof(*buf) + BTRFS_SUPER_INFO_SIZE); - if (!buf) - return -ENOMEM; - - buf->len = BTRFS_SUPER_INFO_SIZE; - ret = pread(fd, buf->data, BTRFS_SUPER_INFO_SIZE, sb_bytenr); - if (ret != BTRFS_SUPER_INFO_SIZE) - goto fail; - - super = (struct btrfs_super_block *)buf->data; - BUG_ON(btrfs_super_bytenr(super) != sb_bytenr); - BUG_ON(btrfs_super_num_devices(super) != 1); - - ret = prepare_system_chunk_sb(super); - if (ret) - goto fail; - - csum_tree_block_size(buf, BTRFS_CRC32_SIZE, 0); - ret = pwrite(fd, buf->data, BTRFS_SUPER_INFO_SIZE, sb_bytenr); - if (ret != BTRFS_SUPER_INFO_SIZE) - goto fail; - - ret = 0; -fail: - free(buf); - if (ret > 0) - ret = -1; - return ret; -} - -static int relocate_one_reference(struct btrfs_trans_handle *trans, - struct btrfs_root *root, - u64 extent_start, u64 extent_size, - struct btrfs_key *extent_key, - struct extent_io_tree *reloc_tree) -{ - struct extent_buffer *leaf; - struct btrfs_file_extent_item *fi; - struct btrfs_key key; - struct btrfs_path path; - struct btrfs_inode_item inode; - struct blk_iterate_data data; - u64 bytenr; - u64 num_bytes; - u64 cur_offset; - u64 new_pos; - u64 nbytes; - u64 sector_end; - u32 sectorsize = root->sectorsize; - unsigned long ptr; - int datacsum; - int fd; - int ret; - - btrfs_init_path(&path); - ret = btrfs_search_slot(trans, root, extent_key, &path, -1, 1); - if (ret) - goto fail; - - leaf = path.nodes[0]; - fi = btrfs_item_ptr(leaf, path.slots[0], - struct btrfs_file_extent_item); - BUG_ON(btrfs_file_extent_offset(leaf, fi) > 0); - if (extent_start != btrfs_file_extent_disk_bytenr(leaf, fi) || - extent_size != btrfs_file_extent_disk_num_bytes(leaf, fi)) { - ret = 1; - goto fail; - } - - bytenr = extent_start + btrfs_file_extent_offset(leaf, fi); - num_bytes = btrfs_file_extent_num_bytes(leaf, fi); - - ret = btrfs_del_item(trans, root, &path); - if (ret) - goto fail; - - ret = btrfs_free_extent(trans, root, extent_start, extent_size, 0, - root->root_key.objectid, - extent_key->objectid, extent_key->offset); - if (ret) - goto fail; - - btrfs_release_path(&path); - - key.objectid = extent_key->objectid; - key.offset = 0; - key.type = BTRFS_INODE_ITEM_KEY; - ret = btrfs_lookup_inode(trans, root, &path, &key, 0); - if (ret) - goto fail; - - leaf = path.nodes[0]; - ptr = btrfs_item_ptr_offset(leaf, path.slots[0]); - read_extent_buffer(leaf, &inode, ptr, sizeof(inode)); - btrfs_release_path(&path); - - BUG_ON(num_bytes & (sectorsize - 1)); - nbytes = btrfs_stack_inode_nbytes(&inode) - num_bytes; - btrfs_set_stack_inode_nbytes(&inode, nbytes); - datacsum = !(btrfs_stack_inode_flags(&inode) & BTRFS_INODE_NODATASUM); - - init_blk_iterate_data(&data, trans, root, &inode, extent_key->objectid, - datacsum); - data.first_block = extent_key->offset; - - cur_offset = extent_key->offset; - while (num_bytes > 0) { - sector_end = bytenr + sectorsize - 1; - if (test_range_bit(reloc_tree, bytenr, sector_end, - EXTENT_LOCKED, 1)) { - ret = get_state_private(reloc_tree, bytenr, &new_pos); - BUG_ON(ret); - } else { - ret = custom_alloc_extent(root, sectorsize, 0, &key, 0); - if (ret) - goto fail; - new_pos = key.objectid; - - if (cur_offset == extent_key->offset) { - fd = root->fs_info->fs_devices->latest_bdev; - readahead(fd, bytenr, num_bytes); - } - ret = copy_disk_extent(root, new_pos, bytenr, - sectorsize); - if (ret) - goto fail; - ret = set_extent_bits(reloc_tree, bytenr, sector_end, - EXTENT_LOCKED, GFP_NOFS); - BUG_ON(ret); - ret = set_state_private(reloc_tree, bytenr, new_pos); - BUG_ON(ret); - } - - ret = block_iterate_proc(new_pos / sectorsize, - cur_offset / sectorsize, &data); - if (ret < 0) - goto fail; - - cur_offset += sectorsize; - bytenr += sectorsize; - num_bytes -= sectorsize; - } - - if (data.num_blocks > 0) { - ret = record_file_blocks(&data, data.first_block, - data.disk_block, data.num_blocks); - if (ret) - goto fail; - } - - key.objectid = extent_key->objectid; - key.offset = 0; - key.type = BTRFS_INODE_ITEM_KEY; - ret = btrfs_lookup_inode(trans, root, &path, &key, 1); - if (ret) - goto fail; - - leaf = path.nodes[0]; - ptr = btrfs_item_ptr_offset(leaf, path.slots[0]); - write_extent_buffer(leaf, &inode, ptr, sizeof(inode)); - btrfs_mark_buffer_dirty(leaf); - btrfs_release_path(&path); - -fail: - btrfs_release_path(&path); - return ret; -} - -static int relocate_extents_range(struct btrfs_root *fs_root, - struct btrfs_root *image_root, - u64 start_byte, u64 end_byte) -{ - struct btrfs_fs_info *info = fs_root->fs_info; - struct btrfs_root *extent_root = info->extent_root; - struct btrfs_root *cur_root = NULL; - struct btrfs_trans_handle *trans; - struct btrfs_extent_data_ref *dref; - struct btrfs_extent_inline_ref *iref; - struct btrfs_extent_item *ei; - struct extent_buffer *leaf; - struct btrfs_key key; - struct btrfs_key extent_key; - struct btrfs_path path; - struct extent_io_tree reloc_tree; - unsigned long ptr; - unsigned long end; - u64 cur_byte; - u64 num_bytes; - u64 ref_root; - u64 num_extents; - int pass = 0; - int ret; - - btrfs_init_path(&path); - extent_io_tree_init(&reloc_tree); - - key.objectid = start_byte; - key.offset = 0; - key.type = BTRFS_EXTENT_ITEM_KEY; - ret = btrfs_search_slot(NULL, extent_root, &key, &path, 0, 0); - if (ret < 0) - goto fail; - if (ret > 0) { - ret = btrfs_previous_item(extent_root, &path, 0, - BTRFS_EXTENT_ITEM_KEY); - if (ret < 0) - goto fail; - if (ret == 0) { - leaf = path.nodes[0]; - btrfs_item_key_to_cpu(leaf, &key, path.slots[0]); - if (key.objectid + key.offset > start_byte) - start_byte = key.objectid; - } - } - btrfs_release_path(&path); -again: - cur_root = (pass % 2 == 0) ? image_root : fs_root; - num_extents = 0; - - trans = btrfs_start_transaction(cur_root, 1); - BUG_ON(!trans); - - cur_byte = start_byte; - while (1) { - key.objectid = cur_byte; - key.offset = 0; - key.type = BTRFS_EXTENT_ITEM_KEY; - ret = btrfs_search_slot(trans, extent_root, - &key, &path, 0, 0); - if (ret < 0) - goto fail; -next: - leaf = path.nodes[0]; - if (path.slots[0] >= btrfs_header_nritems(leaf)) { - ret = btrfs_next_leaf(extent_root, &path); - if (ret < 0) - goto fail; - if (ret > 0) - break; - leaf = path.nodes[0]; - } - - btrfs_item_key_to_cpu(leaf, &key, path.slots[0]); - if (key.objectid < cur_byte || - key.type != BTRFS_EXTENT_ITEM_KEY) { - path.slots[0]++; - goto next; - } - if (key.objectid >= end_byte) - break; - - num_extents++; - - cur_byte = key.objectid; - num_bytes = key.offset; - ei = btrfs_item_ptr(leaf, path.slots[0], - struct btrfs_extent_item); - BUG_ON(!(btrfs_extent_flags(leaf, ei) & - BTRFS_EXTENT_FLAG_DATA)); - - ptr = btrfs_item_ptr_offset(leaf, path.slots[0]); - end = ptr + btrfs_item_size_nr(leaf, path.slots[0]); - - ptr += sizeof(struct btrfs_extent_item); - - while (ptr < end) { - iref = (struct btrfs_extent_inline_ref *)ptr; - key.type = btrfs_extent_inline_ref_type(leaf, iref); - BUG_ON(key.type != BTRFS_EXTENT_DATA_REF_KEY); - dref = (struct btrfs_extent_data_ref *)(&iref->offset); - ref_root = btrfs_extent_data_ref_root(leaf, dref); - extent_key.objectid = - btrfs_extent_data_ref_objectid(leaf, dref); - extent_key.offset = - btrfs_extent_data_ref_offset(leaf, dref); - extent_key.type = BTRFS_EXTENT_DATA_KEY; - BUG_ON(btrfs_extent_data_ref_count(leaf, dref) != 1); - - if (ref_root == cur_root->root_key.objectid) - break; - - ptr += btrfs_extent_inline_ref_size(key.type); - } - - if (ptr >= end) { - path.slots[0]++; - goto next; - } - - ret = relocate_one_reference(trans, cur_root, cur_byte, - num_bytes, &extent_key, - &reloc_tree); - if (ret < 0) - goto fail; - - cur_byte += num_bytes; - btrfs_release_path(&path); - - if (trans->blocks_used >= 4096) { - ret = btrfs_commit_transaction(trans, cur_root); - BUG_ON(ret); - trans = btrfs_start_transaction(cur_root, 1); - BUG_ON(!trans); - } - } - btrfs_release_path(&path); - - ret = btrfs_commit_transaction(trans, cur_root); - BUG_ON(ret); - - if (num_extents > 0 && pass++ < 16) - goto again; - - ret = (num_extents > 0) ? -1 : 0; -fail: - btrfs_release_path(&path); - extent_io_tree_cleanup(&reloc_tree); - return ret; -} - -/* - * relocate data in system chunk - */ -static int cleanup_sys_chunk(struct btrfs_root *fs_root, - struct btrfs_root *image_root) -{ - struct btrfs_block_group_cache *cache; - int i, ret = 0; - u64 offset = 0; - u64 end_byte; - - while(1) { - cache = btrfs_lookup_block_group(fs_root->fs_info, offset); - if (!cache) - break; - - end_byte = cache->key.objectid + cache->key.offset; - if (cache->flags & BTRFS_BLOCK_GROUP_SYSTEM) { - ret = relocate_extents_range(fs_root, image_root, - cache->key.objectid, - end_byte); - if (ret) - goto fail; + break; } - offset = end_byte; - } - for (i = 0; i < BTRFS_SUPER_MIRROR_MAX; i++) { - offset = btrfs_sb_offset(i); - offset &= ~((u64)BTRFS_STRIPE_LEN - 1); - - ret = relocate_extents_range(fs_root, image_root, - offset, offset + BTRFS_STRIPE_LEN); - if (ret) - goto fail; + bytenr += len; } ret = 0; + fsync(fd); fail: + free(buf); + if (ret > 0) + ret = -1; return ret; } -static int fixup_chunk_mapping(struct btrfs_root *root) +static int prepare_system_chunk_sb(struct btrfs_super_block *super) { - struct btrfs_trans_handle *trans; - struct btrfs_fs_info *info = root->fs_info; - struct btrfs_root *chunk_root = info->chunk_root; - struct extent_buffer *leaf; - struct btrfs_key key; - struct btrfs_path path; - struct btrfs_chunk chunk; - unsigned long ptr; - u32 size; - u64 type; - int ret; - - btrfs_init_path(&path); - - trans = btrfs_start_transaction(root, 1); - BUG_ON(!trans); - - /* - * recow the whole chunk tree. this will move all chunk tree blocks - * into system block group. - */ - memset(&key, 0, sizeof(key)); - while (1) { - ret = btrfs_search_slot(trans, chunk_root, &key, &path, 0, 1); - if (ret < 0) - goto err; - - ret = btrfs_next_leaf(chunk_root, &path); - if (ret < 0) - goto err; - if (ret > 0) - break; - - btrfs_item_key_to_cpu(path.nodes[0], &key, path.slots[0]); - btrfs_release_path(&path); - } - btrfs_release_path(&path); - - /* fixup the system chunk array in super block */ - btrfs_set_super_sys_array_size(info->super_copy, 0); - - key.objectid = BTRFS_FIRST_CHUNK_TREE_OBJECTID; - key.offset = 0; - key.type = BTRFS_CHUNK_ITEM_KEY; - - ret = btrfs_search_slot(trans, chunk_root, &key, &path, 0, 0); - if (ret < 0) - goto err; - BUG_ON(ret != 0); - while(1) { - leaf = path.nodes[0]; - if (path.slots[0] >= btrfs_header_nritems(leaf)) { - ret = btrfs_next_leaf(chunk_root, &path); - if (ret < 0) - goto err; - if (ret > 0) - break; - leaf = path.nodes[0]; - } - btrfs_item_key_to_cpu(leaf, &key, path.slots[0]); - if (key.type != BTRFS_CHUNK_ITEM_KEY) - goto next; - - ptr = btrfs_item_ptr_offset(leaf, path.slots[0]); - size = btrfs_item_size_nr(leaf, path.slots[0]); - BUG_ON(size != sizeof(chunk)); - read_extent_buffer(leaf, &chunk, ptr, size); - type = btrfs_stack_chunk_type(&chunk); + struct btrfs_chunk *chunk; + struct btrfs_disk_key *key; + u32 sectorsize = btrfs_super_sectorsize(super); - if (!(type & BTRFS_BLOCK_GROUP_SYSTEM)) - goto next; + key = (struct btrfs_disk_key *)(super->sys_chunk_array); + chunk = (struct btrfs_chunk *)(super->sys_chunk_array + + sizeof(struct btrfs_disk_key)); - ret = btrfs_add_system_chunk(trans, chunk_root, &key, - &chunk, size); - if (ret) - goto err; -next: - path.slots[0]++; - } + btrfs_set_disk_key_objectid(key, BTRFS_FIRST_CHUNK_TREE_OBJECTID); + btrfs_set_disk_key_type(key, BTRFS_CHUNK_ITEM_KEY); + btrfs_set_disk_key_offset(key, 0); - ret = btrfs_commit_transaction(trans, root); - BUG_ON(ret); -err: - btrfs_release_path(&path); - return ret; + btrfs_set_stack_chunk_length(chunk, btrfs_super_total_bytes(super)); + btrfs_set_stack_chunk_owner(chunk, BTRFS_EXTENT_TREE_OBJECTID); + btrfs_set_stack_chunk_stripe_len(chunk, BTRFS_STRIPE_LEN); + btrfs_set_stack_chunk_type(chunk, BTRFS_BLOCK_GROUP_SYSTEM); + btrfs_set_stack_chunk_io_align(chunk, sectorsize); + btrfs_set_stack_chunk_io_width(chunk, sectorsize); + btrfs_set_stack_chunk_sector_size(chunk, sectorsize); + btrfs_set_stack_chunk_num_stripes(chunk, 1); + btrfs_set_stack_chunk_sub_stripes(chunk, 0); + chunk->stripe.devid = super->dev_item.devid; + btrfs_set_stack_stripe_offset(&chunk->stripe, 0); + memcpy(chunk->stripe.dev_uuid, super->dev_item.uuid, BTRFS_UUID_SIZE); + btrfs_set_super_sys_array_size(super, sizeof(*key) + sizeof(*chunk)); + return 0; } static const struct btrfs_convert_operations ext2_convert_ops = { .name = "ext2", .open_fs = ext2_open_fs, .read_used_space = ext2_read_used_space, - .alloc_block = ext2_alloc_block, - .alloc_block_range = ext2_alloc_block_range, .copy_inodes = ext2_copy_inodes, - .test_block = ext2_test_block, - .free_block = ext2_free_block, - .free_block_range = ext2_free_block_range, .close_fs = ext2_close_fs, }; @@ -3247,7 +2140,7 @@ static int convert_read_used_space(struct btrfs_convert_context *cctx) return ret; } -static int do_convert_v2(const char *devname, int datacsum, int packing, +static int do_convert(const char *devname, int datacsum, int packing, int noxattr, u32 nodesize, int copylabel, const char *fslabel, int progress, u64 features) { @@ -3320,7 +2213,7 @@ static int do_convert_v2(const char *devname, int datacsum, int packing, fprintf(stderr, "unable to open ctree\n"); goto fail; } - ret = init_btrfs_v2(&mkfs_cfg, root, &cctx, datacsum, packing, noxattr); + ret = init_btrfs(&mkfs_cfg, root, &cctx, datacsum, packing, noxattr); if (ret) { fprintf(stderr, "unable to setup the root tree\n"); goto fail; @@ -3341,7 +2234,7 @@ static int do_convert_v2(const char *devname, int datacsum, int packing, fprintf(stderr, "unable to create subvol\n"); goto fail; } - ret = create_image_v2(image_root, &mkfs_cfg, &cctx, fd, + ret = create_image(image_root, &mkfs_cfg, &cctx, fd, mkfs_cfg.num_bytes, "image", datacsum); if (ret) { fprintf(stderr, "error during create_image %d\n", ret); @@ -3422,220 +2315,6 @@ fail: return -1; } -static int do_convert(const char *devname, int datacsum, int packing, int noxattr, - u32 nodesize, int copylabel, const char *fslabel, int progress, - u64 features) -{ - int i, ret, blocks_per_node; - int fd = -1; - int is_btrfs = 0; - u32 blocksize; - u64 blocks[7]; - u64 total_bytes; - u64 super_bytenr; - struct btrfs_root *root; - struct btrfs_root *image_root; - struct btrfs_convert_context cctx; - char *subvol_name = NULL; - struct task_ctx ctx; - char features_buf[64]; - struct btrfs_mkfs_config mkfs_cfg; - - init_convert_context(&cctx); - ret = convert_open_fs(devname, &cctx); - if (ret) - goto fail; - ret = convert_read_used_space(&cctx); - if (ret) - goto fail; - - blocksize = cctx.blocksize; - total_bytes = (u64)blocksize * (u64)cctx.block_count; - if (blocksize < 4096) { - fprintf(stderr, "block size is too small\n"); - goto fail; - } - if (btrfs_check_nodesize(nodesize, blocksize, features)) - goto fail; - blocks_per_node = nodesize / blocksize; - ret = -blocks_per_node; - for (i = 0; i < 7; i++) { - if (nodesize == blocksize) - ret = convert_alloc_block(&cctx, 0, blocks + i); - else - ret = convert_alloc_block_range(&cctx, - ret + blocks_per_node, blocks_per_node, - blocks + i); - if (ret) { - fprintf(stderr, "not enough free space\n"); - goto fail; - } - blocks[i] *= blocksize; - } - super_bytenr = blocks[0]; - fd = open(devname, O_RDWR); - if (fd < 0) { - fprintf(stderr, "unable to open %s\n", devname); - goto fail; - } - btrfs_parse_features_to_string(features_buf, features); - if (features == BTRFS_MKFS_DEFAULT_FEATURES) - strcat(features_buf, " (default)"); - - printf("create btrfs filesystem:\n"); - printf("\tblocksize: %u\n", blocksize); - printf("\tnodesize: %u\n", nodesize); - printf("\tfeatures: %s\n", features_buf); - - mkfs_cfg.label = cctx.volume_name; - mkfs_cfg.fs_uuid = NULL; - memcpy(mkfs_cfg.blocks, blocks, sizeof(blocks)); - mkfs_cfg.num_bytes = total_bytes; - mkfs_cfg.nodesize = nodesize; - mkfs_cfg.sectorsize = blocksize; - mkfs_cfg.stripesize = blocksize; - mkfs_cfg.features = features; - - ret = make_btrfs(fd, &mkfs_cfg, NULL); - if (ret) { - fprintf(stderr, "unable to create initial ctree: %s\n", - strerror(-ret)); - goto fail; - } - /* create a system chunk that maps the whole device */ - ret = prepare_system_chunk(fd, super_bytenr); - if (ret) { - fprintf(stderr, "unable to update system chunk\n"); - goto fail; - } - root = open_ctree_fd(fd, devname, super_bytenr, OPEN_CTREE_WRITES); - if (!root) { - fprintf(stderr, "unable to open ctree\n"); - goto fail; - } - ret = cache_free_extents(root, &cctx); - if (ret) { - fprintf(stderr, "error during cache_free_extents %d\n", ret); - goto fail; - } - root->fs_info->extent_ops = &extent_ops; - /* recover block allocation bitmap */ - for (i = 0; i < 7; i++) { - blocks[i] /= blocksize; - if (nodesize == blocksize) - convert_free_block(&cctx, blocks[i]); - else - convert_free_block_range(&cctx, blocks[i], - blocks_per_node); - } - ret = init_btrfs(root); - if (ret) { - fprintf(stderr, "unable to setup the root tree\n"); - goto fail; - } - printf("creating btrfs metadata.\n"); - ctx.max_copy_inodes = (cctx.inodes_count - cctx.free_inodes_count); - ctx.cur_copy_inodes = 0; - - if (progress) { - ctx.info = task_init(print_copied_inodes, after_copied_inodes, &ctx); - task_start(ctx.info); - } - ret = copy_inodes(&cctx, root, datacsum, packing, noxattr, &ctx); - if (ret) { - fprintf(stderr, "error during copy_inodes %d\n", ret); - goto fail; - } - if (progress) { - task_stop(ctx.info); - task_deinit(ctx.info); - } - - printf("creating %s image file.\n", cctx.convert_ops->name); - ret = asprintf(&subvol_name, "%s_saved", cctx.convert_ops->name); - if (ret < 0) { - fprintf(stderr, "error allocating subvolume name: %s_saved\n", - cctx.convert_ops->name); - goto fail; - } - - image_root = link_subvol(root, subvol_name, CONV_IMAGE_SUBVOL_OBJECTID); - - free(subvol_name); - - if (!image_root) { - fprintf(stderr, "unable to create subvol\n"); - goto fail; - } - ret = create_image(&cctx, image_root, "image", datacsum); - if (ret) { - fprintf(stderr, "error during create_image %d\n", ret); - goto fail; - } - memset(root->fs_info->super_copy->label, 0, BTRFS_LABEL_SIZE); - if (copylabel == 1) { - __strncpy_null(root->fs_info->super_copy->label, - cctx.volume_name, BTRFS_LABEL_SIZE - 1); - fprintf(stderr, "copy label '%s'\n", - root->fs_info->super_copy->label); - } else if (copylabel == -1) { - strcpy(root->fs_info->super_copy->label, fslabel); - fprintf(stderr, "set label to '%s'\n", fslabel); - } - - printf("cleaning up system chunk.\n"); - ret = cleanup_sys_chunk(root, image_root); - if (ret) { - fprintf(stderr, "error during cleanup_sys_chunk %d\n", ret); - goto fail; - } - ret = close_ctree(root); - if (ret) { - fprintf(stderr, "error during close_ctree %d\n", ret); - goto fail; - } - convert_close_fs(&cctx); - clean_convert_context(&cctx); - - /* - * If this step succeed, we get a mountable btrfs. Otherwise - * the source fs is left unchanged. - */ - ret = migrate_super_block(fd, super_bytenr, blocksize); - if (ret) { - fprintf(stderr, "unable to migrate super block\n"); - goto fail; - } - is_btrfs = 1; - - root = open_ctree_fd(fd, devname, 0, OPEN_CTREE_WRITES); - if (!root) { - fprintf(stderr, "unable to open ctree\n"); - goto fail; - } - /* move chunk tree into system chunk. */ - ret = fixup_chunk_mapping(root); - if (ret) { - fprintf(stderr, "error during fixup_chunk_tree\n"); - goto fail; - } - ret = close_ctree(root); - close(fd); - - printf("conversion complete.\n"); - return 0; -fail: - clean_convert_context(&cctx); - if (fd != -1) - close(fd); - if (is_btrfs) - fprintf(stderr, - "WARNING: an error occured during chunk mapping fixup, filesystem mountable but not finalized\n"); - else - fprintf(stderr, "conversion aborted\n"); - return -1; -} - static int may_rollback(struct btrfs_root *root) { struct btrfs_fs_info *info = root->fs_info; @@ -4178,7 +2857,7 @@ int main(int argc, char *argv[]) if (rollback) { ret = do_rollback(file); } else { - ret = do_convert_v2(file, datacsum, packing, noxattr, nodesize, + ret = do_convert(file, datacsum, packing, noxattr, nodesize, copylabel, fslabel, progress, features); } if (ret) diff --git a/ctree.h b/ctree.h index 15e73e0..13ed050 100644 --- a/ctree.h +++ b/ctree.h @@ -960,13 +960,6 @@ struct btrfs_block_group_cache { int ro; }; -struct btrfs_extent_ops { - int (*alloc_extent)(struct btrfs_root *root, u64 num_bytes, - u64 hint_byte, struct btrfs_key *ins, int metadata); - int (*free_extent)(struct btrfs_root *root, u64 bytenr, - u64 num_bytes); -}; - struct btrfs_device; struct btrfs_fs_devices; struct btrfs_fs_info { @@ -1017,7 +1010,6 @@ struct btrfs_fs_info { u64 super_bytenr; u64 total_pinned; - struct btrfs_extent_ops *extent_ops; struct list_head dirty_cowonly_roots; struct list_head recow_ebs; diff --git a/extent-tree.c b/extent-tree.c index f9e4bf2..5ca53fa 100644 --- a/extent-tree.c +++ b/extent-tree.c @@ -2181,7 +2181,6 @@ static int __free_extent(struct btrfs_trans_handle *trans, struct btrfs_key key; struct btrfs_path *path; - struct btrfs_extent_ops *ops = root->fs_info->extent_ops; struct btrfs_root *extent_root = root->fs_info->extent_root; struct extent_buffer *leaf; struct btrfs_extent_item *ei; @@ -2382,14 +2381,6 @@ static int __free_extent(struct btrfs_trans_handle *trans, } } - if (ops && ops->free_extent) { - ret = ops->free_extent(root, bytenr, num_bytes); - if (ret > 0) { - pin = 0; - mark_free = 0; - } - } - if (pin) { ret = pin_down_bytes(trans, root, bytenr, num_bytes, is_data); @@ -2662,13 +2653,6 @@ int btrfs_reserve_extent(struct btrfs_trans_handle *trans, u64 alloc_profile; struct btrfs_fs_info *info = root->fs_info; - if (info->extent_ops) { - struct btrfs_extent_ops *ops = info->extent_ops; - ret = ops->alloc_extent(root, num_bytes, hint_byte, ins, !data); - BUG_ON(ret); - goto found; - } - if (data) { alloc_profile = info->avail_data_alloc_bits & info->data_alloc_profile; @@ -2702,7 +2686,6 @@ int btrfs_reserve_extent(struct btrfs_trans_handle *trans, trans->alloc_exclude_start, trans->alloc_exclude_nr, data); BUG_ON(ret); -found: clear_extent_dirty(&root->fs_info->free_space_cache, ins->objectid, ins->objectid + ins->offset - 1, GFP_NOFS); -- 2.12.3
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