const char *name;
int (*open_fs)(struct btrfs_convert_context *cctx, const char *devname);
int (*read_used_space)(struct btrfs_convert_context *cctx);
- int (*alloc_block)(struct btrfs_convert_context *cctx, u64 goal,
- u64 *block_ret);
- int (*alloc_block_range)(struct btrfs_convert_context *cctx, u64 goal,
- int num, u64 *block_ret);
- int (*test_block)(struct btrfs_convert_context *cctx, u64 block);
- void (*free_block)(struct btrfs_convert_context *cctx, u64 block);
- void (*free_block_range)(struct btrfs_convert_context *cctx, u64 block,
- int num);
int (*copy_inodes)(struct btrfs_convert_context *cctx,
struct btrfs_root *root, int datacsum,
int packing, int noxattr, struct task_ctx *p);
free_extent_cache_tree(&cctx->free);
}
-static inline int convert_alloc_block(struct btrfs_convert_context *cctx,
- u64 goal, u64 *ret)
-{
- return cctx->convert_ops->alloc_block(cctx, goal, ret);
-}
-
-static inline int convert_alloc_block_range(struct btrfs_convert_context *cctx,
- u64 goal, int num, u64 *ret)
-{
- return cctx->convert_ops->alloc_block_range(cctx, goal, num, ret);
-}
-
-static inline int convert_test_block(struct btrfs_convert_context *cctx,
- u64 block)
-{
- return cctx->convert_ops->test_block(cctx, block);
-}
-
-static inline void convert_free_block(struct btrfs_convert_context *cctx,
- u64 block)
-{
- cctx->convert_ops->free_block(cctx, block);
-}
-
-static inline void convert_free_block_range(struct btrfs_convert_context *cctx,
- u64 block, int num)
-{
- cctx->convert_ops->free_block_range(cctx, block, num);
-}
-
static inline int copy_inodes(struct btrfs_convert_context *cctx,
struct btrfs_root *root, int datacsum,
int packing, int noxattr, struct task_ctx *p)
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)
-{
- u64 start;
- u64 end;
- u64 last = hint_byte;
- int ret;
- int wrapped = 0;
- struct btrfs_block_group_cache *cache;
-
- while(1) {
- ret = find_first_extent_bit(&root->fs_info->free_space_cache,
- last, &start, &end, EXTENT_DIRTY);
- if (ret) {
- if (wrapped++ == 0) {
- last = 0;
- continue;
- } else {
- goto fail;
- }
- }
-
- start = max(last, start);
- last = end + 1;
- if (last - start < num_bytes)
- continue;
-
- last = start + num_bytes;
- if (test_range_bit(&root->fs_info->pinned_extents,
- start, last - 1, EXTENT_DIRTY, 0))
- continue;
-
- cache = btrfs_lookup_block_group(root->fs_info, start);
- BUG_ON(!cache);
- if (cache->flags & BTRFS_BLOCK_GROUP_SYSTEM ||
- last > cache->key.objectid + cache->key.offset) {
- last = cache->key.objectid + cache->key.offset;
- continue;
- }
-
- if (metadata) {
- BUG_ON(num_bytes != root->nodesize);
- if (check_crossing_stripes(start, num_bytes)) {
- last = round_down(start + num_bytes,
- BTRFS_STRIPE_LEN);
- continue;
- }
- }
- clear_extent_dirty(&root->fs_info->free_space_cache,
- start, start + num_bytes - 1, 0);
-
- ins->objectid = start;
- ins->offset = num_bytes;
- ins->type = BTRFS_EXTENT_ITEM_KEY;
- return 0;
- }
-fail:
- fprintf(stderr, "not enough free space\n");
- return -ENOSPC;
-}
-
static int intersect_with_sb(u64 bytenr, u64 num_bytes)
{
int i;
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,
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.
*/
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,
* 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)
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;
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;
}
/*
- * 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,
* (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)
{
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
*/
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,
};
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)
{
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;
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);
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;
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)
projects / platform / upstream / btrfs-progs.git / commitdiff