/* * Copyright (C) 2007 Oracle. All rights reserved. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public * License v2 as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public * License along with this program; if not, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 021110-1307, USA. */ #include "kerncompat.h" #include #include #include "ioctl.h" #include #include #include #include #include #include #include #include #include #include #include "kernel-shared/ctree.h" #include "kernel-shared/disk-io.h" #include "kernel-shared/free-space-tree.h" #include "kernel-shared/volumes.h" #include "kernel-shared/transaction.h" #include "kernel-shared/zoned.h" #include "crypto/crc32c.h" #include "common/utils.h" #include "common/path-utils.h" #include "common/device-utils.h" #include "common/device-scan.h" #include "kernel-lib/list_sort.h" #include "common/help.h" #include "common/rbtree-utils.h" #include "common/parse-utils.h" #include "mkfs/common.h" #include "mkfs/rootdir.h" #include "common/fsfeatures.h" #include "common/box.h" #include "common/units.h" #include "check/qgroup-verify.h" struct mkfs_allocation { u64 data; u64 metadata; u64 mixed; u64 system; }; static int create_metadata_block_groups(struct btrfs_root *root, bool mixed, struct mkfs_allocation *allocation) { struct btrfs_fs_info *fs_info = root->fs_info; struct btrfs_trans_handle *trans; struct btrfs_space_info *sinfo; u64 flags = BTRFS_BLOCK_GROUP_METADATA; u64 chunk_start = 0; u64 chunk_size = 0; u64 system_group_size = BTRFS_MKFS_SYSTEM_GROUP_SIZE; int ret; if (btrfs_is_zoned(fs_info)) { /* Two zones are reserved for superblock */ system_group_size = fs_info->zone_size; } if (mixed) flags |= BTRFS_BLOCK_GROUP_DATA; /* Create needed space info to trace extents reservation */ ret = update_space_info(fs_info, flags, 0, 0, &sinfo); if (ret < 0) return ret; trans = btrfs_start_transaction(root, 1); BUG_ON(IS_ERR(trans)); root->fs_info->system_allocs = 1; /* * We already created the block group item for our temporary system * chunk in make_btrfs(), so account for the size here. */ allocation->system += system_group_size; if (ret) return ret; if (mixed) { ret = btrfs_alloc_chunk(trans, fs_info, &chunk_start, &chunk_size, BTRFS_BLOCK_GROUP_METADATA | BTRFS_BLOCK_GROUP_DATA); if (ret == -ENOSPC) { error("no space to allocate data/metadata chunk"); goto err; } if (ret) return ret; ret = btrfs_make_block_group(trans, fs_info, 0, BTRFS_BLOCK_GROUP_METADATA | BTRFS_BLOCK_GROUP_DATA, chunk_start, chunk_size); if (ret) return ret; allocation->mixed += chunk_size; } else { ret = btrfs_alloc_chunk(trans, fs_info, &chunk_start, &chunk_size, BTRFS_BLOCK_GROUP_METADATA); if (ret == -ENOSPC) { error("no space to allocate metadata chunk"); goto err; } if (ret) return ret; ret = btrfs_make_block_group(trans, fs_info, 0, BTRFS_BLOCK_GROUP_METADATA, chunk_start, chunk_size); allocation->metadata += chunk_size; if (ret) return ret; } root->fs_info->system_allocs = 0; ret = btrfs_commit_transaction(trans, root); err: return ret; } static int create_data_block_groups(struct btrfs_trans_handle *trans, struct btrfs_root *root, bool mixed, struct mkfs_allocation *allocation) { struct btrfs_fs_info *fs_info = root->fs_info; u64 chunk_start = 0; u64 chunk_size = 0; int ret = 0; if (!mixed) { struct btrfs_space_info *sinfo; ret = update_space_info(fs_info, BTRFS_BLOCK_GROUP_DATA, 0, 0, &sinfo); if (ret < 0) return ret; ret = btrfs_alloc_chunk(trans, fs_info, &chunk_start, &chunk_size, BTRFS_BLOCK_GROUP_DATA); if (ret == -ENOSPC) { error("no space to allocate data chunk"); goto err; } if (ret) return ret; ret = btrfs_make_block_group(trans, fs_info, 0, BTRFS_BLOCK_GROUP_DATA, chunk_start, chunk_size); allocation->data += chunk_size; if (ret) return ret; } err: return ret; } static int make_root_dir(struct btrfs_trans_handle *trans, struct btrfs_root *root) { struct btrfs_key location; int ret; ret = btrfs_make_root_dir(trans, root->fs_info->tree_root, BTRFS_ROOT_TREE_DIR_OBJECTID); if (ret) goto err; ret = btrfs_make_root_dir(trans, root, BTRFS_FIRST_FREE_OBJECTID); if (ret) goto err; memcpy(&location, &root->fs_info->fs_root->root_key, sizeof(location)); location.offset = (u64)-1; ret = btrfs_insert_dir_item(trans, root->fs_info->tree_root, "default", 7, btrfs_super_root_dir(root->fs_info->super_copy), &location, BTRFS_FT_DIR, 0); if (ret) goto err; ret = btrfs_insert_inode_ref(trans, root->fs_info->tree_root, "default", 7, location.objectid, BTRFS_ROOT_TREE_DIR_OBJECTID, 0); if (ret) goto err; err: return ret; } static int __recow_root(struct btrfs_trans_handle *trans, struct btrfs_root *root) { struct btrfs_path path; struct btrfs_key key; int ret; btrfs_init_path(&path); key.objectid = 0; key.type = 0; key.offset = 0; /* Get a path to the left-most leaves */ ret = btrfs_search_slot(NULL, root, &key, &path, 0, 0); if (ret < 0) return ret; while (true) { struct btrfs_key found_key; /* * Our parent nodes must not be newer than the leaf, thus if * the leaf is as new as the transaction, no need to re-COW. */ if (btrfs_header_generation(path.nodes[0]) == trans->transid) goto next; /* * Grab the key of current tree block and do a COW search to * the current tree block. */ btrfs_item_key_to_cpu(path.nodes[0], &key, 0); btrfs_release_path(&path); /* This will ensure this leaf and all its parent get COWed */ ret = btrfs_search_slot(trans, root, &key, &path, 0, 1); if (ret < 0) goto out; ret = 0; btrfs_item_key_to_cpu(path.nodes[0], &found_key, 0); ASSERT(btrfs_comp_cpu_keys(&key, &found_key) == 0); next: ret = btrfs_next_leaf(root, &path); if (ret < 0) goto out; if (ret > 0) { ret = 0; goto out; } } out: btrfs_release_path(&path); return ret; } static int recow_global_roots(struct btrfs_trans_handle *trans) { struct btrfs_fs_info *fs_info = trans->fs_info; struct btrfs_root *root; struct rb_node *n; int ret = 0; for (n = rb_first(&fs_info->global_roots_tree); n; n = rb_next(n)) { root = rb_entry(n, struct btrfs_root, rb_node); ret = __recow_root(trans, root); if (ret) return ret; } return ret; } static int recow_roots(struct btrfs_trans_handle *trans, struct btrfs_root *root) { struct btrfs_fs_info *info = root->fs_info; int ret; ret = __recow_root(trans, info->fs_root); if (ret) return ret; ret = __recow_root(trans, info->tree_root); if (ret) return ret; ret = __recow_root(trans, info->chunk_root); if (ret) return ret; ret = __recow_root(trans, info->dev_root); if (ret) return ret; if (btrfs_fs_compat_ro(info, BLOCK_GROUP_TREE)) { ret = __recow_root(trans, info->block_group_root); if (ret) return ret; } ret = recow_global_roots(trans); if (ret) return ret; return 0; } static int create_one_raid_group(struct btrfs_trans_handle *trans, struct btrfs_root *root, u64 type, struct mkfs_allocation *allocation) { struct btrfs_fs_info *fs_info = root->fs_info; u64 chunk_start; u64 chunk_size; int ret; ret = btrfs_alloc_chunk(trans, fs_info, &chunk_start, &chunk_size, type); if (ret == -ENOSPC) { error("not enough free space to allocate chunk"); exit(1); } if (ret) return ret; ret = btrfs_make_block_group(trans, fs_info, 0, type, chunk_start, chunk_size); type &= BTRFS_BLOCK_GROUP_TYPE_MASK; if (type == BTRFS_BLOCK_GROUP_DATA) { allocation->data += chunk_size; } else if (type == BTRFS_BLOCK_GROUP_METADATA) { allocation->metadata += chunk_size; } else if (type == BTRFS_BLOCK_GROUP_SYSTEM) { allocation->system += chunk_size; } else if (type == (BTRFS_BLOCK_GROUP_METADATA | BTRFS_BLOCK_GROUP_DATA)) { allocation->mixed += chunk_size; } else { error("unrecognized profile type: 0x%llx", (unsigned long long)type); ret = -EINVAL; } return ret; } static int create_raid_groups(struct btrfs_trans_handle *trans, struct btrfs_root *root, u64 data_profile, u64 metadata_profile, bool mixed, struct mkfs_allocation *allocation) { int ret = 0; if (metadata_profile) { u64 meta_flags = BTRFS_BLOCK_GROUP_METADATA; ret = create_one_raid_group(trans, root, BTRFS_BLOCK_GROUP_SYSTEM | metadata_profile, allocation); if (ret) return ret; if (mixed) meta_flags |= BTRFS_BLOCK_GROUP_DATA; ret = create_one_raid_group(trans, root, meta_flags | metadata_profile, allocation); if (ret) return ret; } if (!mixed && data_profile) { ret = create_one_raid_group(trans, root, BTRFS_BLOCK_GROUP_DATA | data_profile, allocation); if (ret) return ret; } return ret; } static void print_usage(int ret) { printf("Usage: mkfs.btrfs [options] dev [ dev ... ]\n"); printf("Options:\n"); printf(" allocation profiles:\n"); printf("\t-d|--data PROFILE data profile, raid0, raid1, raid1c3, raid1c4, raid5, raid6, raid10, dup or single\n"); printf("\t-m|--metadata PROFILE metadata profile, values like for data profile\n"); printf("\t-M|--mixed mix metadata and data together\n"); printf(" features:\n"); printf("\t--csum TYPE\n"); printf("\t--checksum TYPE checksum algorithm to use, crc32c (default), xxhash, sha256, blake2\n"); printf("\t-n|--nodesize SIZE size of btree nodes\n"); printf("\t-s|--sectorsize SIZE data block size (may not be mountable by current kernel)\n"); printf("\t-O|--features LIST comma separated list of filesystem features (use '-O list-all' to list features)\n"); printf("\t-R|--runtime-features LIST comma separated list of runtime features (use '-R list-all' to list runtime features)\n"); printf("\t-L|--label LABEL set the filesystem label\n"); printf("\t-U|--uuid UUID specify the filesystem UUID (must be unique)\n"); printf(" creation:\n"); printf("\t-b|--byte-count SIZE set filesystem size to SIZE (on the first device)\n"); printf("\t-r|--rootdir DIR copy files from DIR to the image root directory\n"); printf("\t--shrink (with --rootdir) shrink the filled filesystem to minimal size\n"); printf("\t-K|--nodiscard do not perform whole device TRIM\n"); printf("\t-f|--force force overwrite of existing filesystem\n"); printf(" general:\n"); printf("\t-q|--quiet no messages except errors\n"); printf("\t-v|--verbose increase verbosity level, default is 1\n"); printf("\t-V|--version print the mkfs.btrfs version and exit\n"); printf("\t--help print this help and exit\n"); printf(" deprecated:\n"); printf("\t-l|--leafsize SIZE deprecated, alias for nodesize\n"); exit(ret); } static u64 parse_profile(const char *s) { int ret; u64 flags = 0; ret = parse_bg_profile(s, &flags); if (ret) { error("unknown profile %s", s); exit(1); } return flags; } static char *parse_label(const char *input) { int len = strlen(input); if (len >= BTRFS_LABEL_SIZE) { error("label %s is too long (max %d)", input, BTRFS_LABEL_SIZE - 1); exit(1); } return strdup(input); } static int zero_output_file(int out_fd, u64 size) { int loop_num; u64 location = 0; char buf[SZ_4K]; int ret = 0, i; ssize_t written; memset(buf, 0, SZ_4K); /* Only zero out the first 1M */ loop_num = SZ_1M / SZ_4K; for (i = 0; i < loop_num; i++) { written = pwrite64(out_fd, buf, SZ_4K, location); if (written != SZ_4K) ret = -EIO; location += SZ_4K; } /* Then enlarge the file to size */ written = pwrite64(out_fd, buf, 1, size - 1); if (written < 1) ret = -EIO; return ret; } static bool is_ssd(const char *file) { char rotational; int ret; ret = device_get_queue_param(file, "rotational", &rotational, 1); if (ret < 1) return false; return rotational == '0'; } static int _cmp_device_by_id(void *priv, struct list_head *a, struct list_head *b) { return list_entry(a, struct btrfs_device, dev_list)->devid - list_entry(b, struct btrfs_device, dev_list)->devid; } static void list_all_devices(struct btrfs_root *root) { struct btrfs_fs_devices *fs_devices; struct btrfs_device *device; int number_of_devices = 0; u64 total_block_count = 0; fs_devices = root->fs_info->fs_devices; list_for_each_entry(device, &fs_devices->devices, dev_list) number_of_devices++; list_sort(NULL, &fs_devices->devices, _cmp_device_by_id); printf("Number of devices: %d\n", number_of_devices); /* printf("Total devices size: %10s\n", */ /* pretty_size(total_block_count)); */ printf("Devices:\n"); printf(" ID SIZE PATH\n"); list_for_each_entry(device, &fs_devices->devices, dev_list) { printf(" %3llu %10s %s\n", device->devid, pretty_size(device->total_bytes), device->name); total_block_count += device->total_bytes; } printf("\n"); } static int is_temp_block_group(struct extent_buffer *node, struct btrfs_block_group_item *bgi, u64 data_profile, u64 meta_profile, u64 sys_profile) { u64 flag = btrfs_block_group_flags(node, bgi); u64 flag_type = flag & BTRFS_BLOCK_GROUP_TYPE_MASK; u64 flag_profile = flag & BTRFS_BLOCK_GROUP_PROFILE_MASK; u64 used = btrfs_block_group_used(node, bgi); /* * Chunks meets all the following conditions is a temp chunk * 1) Empty chunk * Temp chunk is always empty. * * 2) profile mismatch with mkfs profile. * Temp chunk is always in SINGLE * * 3) Size differs with mkfs_alloc * Special case for SINGLE/SINGLE btrfs. * In that case, temp data chunk and real data chunk are always empty. * So we need to use mkfs_alloc to be sure which chunk is the newly * allocated. * * Normally, new chunk size is equal to mkfs one (One chunk) * If it has multiple chunks, we just refuse to delete any one. * As they are all single, so no real problem will happen. * So only use condition 1) and 2) to judge them. */ if (used != 0) return 0; switch (flag_type) { case BTRFS_BLOCK_GROUP_DATA: case BTRFS_BLOCK_GROUP_DATA | BTRFS_BLOCK_GROUP_METADATA: data_profile &= BTRFS_BLOCK_GROUP_PROFILE_MASK; if (flag_profile != data_profile) return 1; break; case BTRFS_BLOCK_GROUP_METADATA: meta_profile &= BTRFS_BLOCK_GROUP_PROFILE_MASK; if (flag_profile != meta_profile) return 1; break; case BTRFS_BLOCK_GROUP_SYSTEM: sys_profile &= BTRFS_BLOCK_GROUP_PROFILE_MASK; if (flag_profile != sys_profile) return 1; break; } return 0; } /* Note: if current is a block group, it will skip it anyway */ static int next_block_group(struct btrfs_root *root, struct btrfs_path *path) { struct btrfs_key key; int ret = 0; while (1) { ret = btrfs_next_item(root, path); if (ret) goto out; btrfs_item_key_to_cpu(path->nodes[0], &key, path->slots[0]); if (key.type == BTRFS_BLOCK_GROUP_ITEM_KEY) goto out; } out: return ret; } /* This function will cleanup */ static int cleanup_temp_chunks(struct btrfs_fs_info *fs_info, struct mkfs_allocation *alloc, u64 data_profile, u64 meta_profile, u64 sys_profile) { struct btrfs_trans_handle *trans = NULL; struct btrfs_block_group_item *bgi; struct btrfs_root *root = btrfs_block_group_root(fs_info); struct btrfs_key key; struct btrfs_key found_key; struct btrfs_path path; int ret = 0; btrfs_init_path(&path); trans = btrfs_start_transaction(root, 1); BUG_ON(IS_ERR(trans)); key.objectid = 0; key.type = BTRFS_BLOCK_GROUP_ITEM_KEY; key.offset = 0; while (1) { /* * as the rest of the loop may modify the tree, we need to * start a new search each time. */ ret = btrfs_search_slot(trans, root, &key, &path, 0, 0); if (ret < 0) goto out; /* Don't pollute ret for >0 case */ if (ret > 0) ret = 0; btrfs_item_key_to_cpu(path.nodes[0], &found_key, path.slots[0]); if (found_key.objectid < key.objectid) goto out; if (found_key.type != BTRFS_BLOCK_GROUP_ITEM_KEY) { ret = next_block_group(root, &path); if (ret < 0) goto out; if (ret > 0) { ret = 0; goto out; } btrfs_item_key_to_cpu(path.nodes[0], &found_key, path.slots[0]); } bgi = btrfs_item_ptr(path.nodes[0], path.slots[0], struct btrfs_block_group_item); if (is_temp_block_group(path.nodes[0], bgi, data_profile, meta_profile, sys_profile)) { u64 flags = btrfs_block_group_flags(path.nodes[0], bgi); ret = btrfs_remove_block_group(trans, found_key.objectid, found_key.offset); if (ret < 0) goto out; if ((flags & BTRFS_BLOCK_GROUP_TYPE_MASK) == BTRFS_BLOCK_GROUP_DATA) alloc->data -= found_key.offset; else if ((flags & BTRFS_BLOCK_GROUP_TYPE_MASK) == BTRFS_BLOCK_GROUP_METADATA) alloc->metadata -= found_key.offset; else if ((flags & BTRFS_BLOCK_GROUP_TYPE_MASK) == BTRFS_BLOCK_GROUP_SYSTEM) alloc->system -= found_key.offset; else if ((flags & BTRFS_BLOCK_GROUP_TYPE_MASK) == (BTRFS_BLOCK_GROUP_METADATA | BTRFS_BLOCK_GROUP_DATA)) alloc->mixed -= found_key.offset; } btrfs_release_path(&path); key.objectid = found_key.objectid + found_key.offset; } out: if (trans) btrfs_commit_transaction(trans, root); btrfs_release_path(&path); return ret; } /* * Just update chunk allocation info, since --rootdir may allocate new * chunks which is not updated in @allocation structure. */ static void update_chunk_allocation(struct btrfs_fs_info *fs_info, struct mkfs_allocation *allocation) { struct btrfs_block_group *bg_cache; const u64 mixed_flag = BTRFS_BLOCK_GROUP_DATA | BTRFS_BLOCK_GROUP_METADATA; u64 search_start = 0; allocation->mixed = 0; allocation->data = 0; allocation->metadata = 0; allocation->system = 0; while (1) { bg_cache = btrfs_lookup_first_block_group(fs_info, search_start); if (!bg_cache) break; if ((bg_cache->flags & mixed_flag) == mixed_flag) allocation->mixed += bg_cache->length; else if (bg_cache->flags & BTRFS_BLOCK_GROUP_DATA) allocation->data += bg_cache->length; else if (bg_cache->flags & BTRFS_BLOCK_GROUP_METADATA) allocation->metadata += bg_cache->length; else allocation->system += bg_cache->length; search_start = bg_cache->start + bg_cache->length; } } static int create_data_reloc_tree(struct btrfs_trans_handle *trans) { struct btrfs_fs_info *fs_info = trans->fs_info; struct btrfs_inode_item *inode; struct btrfs_root *root; struct btrfs_path path; struct btrfs_key key = { .objectid = BTRFS_DATA_RELOC_TREE_OBJECTID, .type = BTRFS_ROOT_ITEM_KEY, }; u64 ino = BTRFS_FIRST_FREE_OBJECTID; char *name = ".."; int ret; root = btrfs_create_tree(trans, fs_info, &key); if (IS_ERR(root)) { ret = PTR_ERR(root); goto out; } /* Update dirid as created tree has default dirid 0 */ btrfs_set_root_dirid(&root->root_item, ino); ret = btrfs_update_root(trans, fs_info->tree_root, &root->root_key, &root->root_item); if (ret < 0) goto out; /* Cache this tree so it can be cleaned up at close_ctree() */ ret = rb_insert(&fs_info->fs_root_tree, &root->rb_node, btrfs_fs_roots_compare_roots); if (ret < 0) goto out; /* Insert INODE_ITEM */ ret = btrfs_new_inode(trans, root, ino, 0755 | S_IFDIR); if (ret < 0) goto out; /* then INODE_REF */ ret = btrfs_insert_inode_ref(trans, root, name, strlen(name), ino, ino, 0); if (ret < 0) goto out; /* Update nlink of that inode item */ key.objectid = ino; key.type = BTRFS_INODE_ITEM_KEY; key.offset = 0; btrfs_init_path(&path); ret = btrfs_search_slot(trans, root, &key, &path, 0, 1); if (ret > 0) { ret = -ENOENT; btrfs_release_path(&path); goto out; } if (ret < 0) { btrfs_release_path(&path); goto out; } inode = btrfs_item_ptr(path.nodes[0], path.slots[0], struct btrfs_inode_item); btrfs_set_inode_nlink(path.nodes[0], inode, 1); btrfs_mark_buffer_dirty(path.nodes[0]); btrfs_release_path(&path); return 0; out: btrfs_abort_transaction(trans, ret); return ret; } static int create_uuid_tree(struct btrfs_trans_handle *trans) { struct btrfs_fs_info *fs_info = trans->fs_info; struct btrfs_root *root; struct btrfs_key key = { .objectid = BTRFS_UUID_TREE_OBJECTID, .type = BTRFS_ROOT_ITEM_KEY, }; int ret = 0; ASSERT(fs_info->uuid_root == NULL); root = btrfs_create_tree(trans, fs_info, &key); if (IS_ERR(root)) { ret = PTR_ERR(root); goto out; } add_root_to_dirty_list(root); fs_info->uuid_root = root; ret = btrfs_uuid_tree_add(trans, fs_info->fs_root->root_item.uuid, BTRFS_UUID_KEY_SUBVOL, fs_info->fs_root->root_key.objectid); if (ret < 0) btrfs_abort_transaction(trans, ret); out: return ret; } static int create_global_root(struct btrfs_trans_handle *trans, u64 objectid, int root_id) { struct btrfs_fs_info *fs_info = trans->fs_info; struct btrfs_root *root; struct btrfs_key key = { .objectid = objectid, .type = BTRFS_ROOT_ITEM_KEY, .offset = root_id, }; int ret = 0; root = btrfs_create_tree(trans, fs_info, &key); if (IS_ERR(root)) { ret = PTR_ERR(root); goto out; } ret = btrfs_global_root_insert(fs_info, root); out: if (ret) btrfs_abort_transaction(trans, ret); return ret; } static int create_global_roots(struct btrfs_trans_handle *trans, int nr_global_roots) { int ret, i; for (i = 1; i < nr_global_roots; i++) { ret = create_global_root(trans, BTRFS_EXTENT_TREE_OBJECTID, i); if (ret) return ret; ret = create_global_root(trans, BTRFS_CSUM_TREE_OBJECTID, i); if (ret) return ret; ret = create_global_root(trans, BTRFS_FREE_SPACE_TREE_OBJECTID, i); if (ret) return ret; } btrfs_set_super_nr_global_roots(trans->fs_info->super_copy, nr_global_roots); return 0; } static int insert_qgroup_items(struct btrfs_trans_handle *trans, struct btrfs_fs_info *fs_info, u64 qgroupid) { struct btrfs_path path; struct btrfs_root *quota_root = fs_info->quota_root; struct btrfs_key key; int ret; if (qgroupid >> BTRFS_QGROUP_LEVEL_SHIFT) { error("qgroup level other than 0 is not supported yet"); return -ENOTTY; } key.objectid = 0; key.type = BTRFS_QGROUP_INFO_KEY; key.offset = qgroupid; btrfs_init_path(&path); ret = btrfs_insert_empty_item(trans, quota_root, &path, &key, sizeof(struct btrfs_qgroup_info_item)); btrfs_release_path(&path); if (ret < 0) return ret; key.objectid = 0; key.type = BTRFS_QGROUP_LIMIT_KEY; key.offset = qgroupid; ret = btrfs_insert_empty_item(trans, quota_root, &path, &key, sizeof(struct btrfs_qgroup_limit_item)); btrfs_release_path(&path); return ret; } static int setup_quota_root(struct btrfs_fs_info *fs_info) { struct btrfs_trans_handle *trans; struct btrfs_qgroup_status_item *qsi; struct btrfs_root *quota_root; struct btrfs_path path; struct btrfs_key key; int qgroup_repaired = 0; int ret; /* One to modify tree root, one for quota root */ trans = btrfs_start_transaction(fs_info->tree_root, 2); if (IS_ERR(trans)) { ret = PTR_ERR(trans); error("failed to start transaction: %d (%m)", ret); return ret; } ret = btrfs_create_root(trans, fs_info, BTRFS_QUOTA_TREE_OBJECTID); if (ret < 0) { error("failed to create quota root: %d (%m)", ret); goto fail; } quota_root = fs_info->quota_root; key.objectid = 0; key.type = BTRFS_QGROUP_STATUS_KEY; key.offset = 0; btrfs_init_path(&path); ret = btrfs_insert_empty_item(trans, quota_root, &path, &key, sizeof(*qsi)); if (ret < 0) { error("failed to insert qgroup status item: %d (%m)", ret); goto fail; } qsi = btrfs_item_ptr(path.nodes[0], path.slots[0], struct btrfs_qgroup_status_item); btrfs_set_qgroup_status_generation(path.nodes[0], qsi, 0); btrfs_set_qgroup_status_rescan(path.nodes[0], qsi, 0); /* Mark current status info inconsistent, and fix it later */ btrfs_set_qgroup_status_flags(path.nodes[0], qsi, BTRFS_QGROUP_STATUS_FLAG_ON | BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT); btrfs_release_path(&path); /* Currently mkfs will only create one subvolume */ ret = insert_qgroup_items(trans, fs_info, BTRFS_FS_TREE_OBJECTID); if (ret < 0) { error("failed to insert qgroup items: %d (%m)", ret); goto fail; } ret = btrfs_commit_transaction(trans, fs_info->tree_root); if (ret < 0) { error("failed to commit current transaction: %d (%m)", ret); return ret; } /* * Qgroup is setup but with wrong info, use qgroup-verify * infrastructure to repair them. (Just acts as offline rescan) */ ret = qgroup_verify_all(fs_info); if (ret < 0) { error("qgroup rescan failed: %d (%m)", ret); return ret; } ret = repair_qgroups(fs_info, &qgroup_repaired, true); if (ret < 0) error("failed to fill qgroup info: %d (%m)", ret); return ret; fail: btrfs_abort_transaction(trans, ret); return ret; } int BOX_MAIN(mkfs)(int argc, char **argv) { char *file; struct btrfs_root *root; struct btrfs_fs_info *fs_info; struct btrfs_trans_handle *trans; struct open_ctree_flags ocf = { 0 }; char *label = NULL; u64 block_count = 0; u64 dev_block_count = 0; u64 metadata_profile = 0; u64 data_profile = 0; u32 nodesize = 0; u32 sectorsize = 0; u32 stripesize = 4096; bool zero_end = true; int fd = -1; int ret = 0; int close_ret; int i; bool mixed = false; bool nodesize_forced = false; bool data_profile_opt = false; bool metadata_profile_opt = false; bool discard = true; bool ssd = false; bool zoned = false; bool force_overwrite = false; int oflags; char *source_dir = NULL; bool source_dir_set = false; bool shrink_rootdir = false; u64 source_dir_size = 0; u64 min_dev_size; u64 shrink_size; int dev_cnt = 0; int saved_optind; char fs_uuid[BTRFS_UUID_UNPARSED_SIZE] = { 0 }; u64 features = BTRFS_MKFS_DEFAULT_FEATURES; u64 runtime_features = BTRFS_MKFS_DEFAULT_RUNTIME_FEATURES; struct mkfs_allocation allocation = { 0 }; struct btrfs_mkfs_config mkfs_cfg; enum btrfs_csum_type csum_type = BTRFS_CSUM_TYPE_CRC32; u64 system_group_size; int nr_global_roots = sysconf(_SC_NPROCESSORS_ONLN); crc32c_optimization_init(); btrfs_config_init(); while(1) { int c; enum { GETOPT_VAL_SHRINK = GETOPT_VAL_FIRST, GETOPT_VAL_CHECKSUM, GETOPT_VAL_GLOBAL_ROOTS, }; static const struct option long_options[] = { { "byte-count", required_argument, NULL, 'b' }, { "csum", required_argument, NULL, GETOPT_VAL_CHECKSUM }, { "checksum", required_argument, NULL, GETOPT_VAL_CHECKSUM }, { "force", no_argument, NULL, 'f' }, { "leafsize", required_argument, NULL, 'l' }, { "label", required_argument, NULL, 'L'}, { "metadata", required_argument, NULL, 'm' }, { "mixed", no_argument, NULL, 'M' }, { "nodesize", required_argument, NULL, 'n' }, { "sectorsize", required_argument, NULL, 's' }, { "data", required_argument, NULL, 'd' }, { "version", no_argument, NULL, 'V' }, { "rootdir", required_argument, NULL, 'r' }, { "nodiscard", no_argument, NULL, 'K' }, { "features", required_argument, NULL, 'O' }, { "runtime-features", required_argument, NULL, 'R' }, { "uuid", required_argument, NULL, 'U' }, { "quiet", 0, NULL, 'q' }, { "verbose", 0, NULL, 'v' }, { "shrink", no_argument, NULL, GETOPT_VAL_SHRINK }, #if EXPERIMENTAL { "num-global-roots", required_argument, NULL, GETOPT_VAL_GLOBAL_ROOTS }, #endif { "help", no_argument, NULL, GETOPT_VAL_HELP }, { NULL, 0, NULL, 0} }; c = getopt_long(argc, argv, "A:b:fl:n:s:m:d:L:R:O:r:U:VvMKq", long_options, NULL); if (c < 0) break; switch(c) { case 'f': force_overwrite = true; break; case 'd': data_profile = parse_profile(optarg); data_profile_opt = true; break; case 'l': warning("--leafsize is deprecated, use --nodesize"); /* fall through */ case 'n': nodesize = parse_size_from_string(optarg); nodesize_forced = true; break; case 'L': label = parse_label(optarg); break; case 'm': metadata_profile = parse_profile(optarg); metadata_profile_opt = true; break; case 'M': mixed = true; break; case 'O': { char *orig = strdup(optarg); char *tmp = orig; tmp = btrfs_parse_fs_features(tmp, &features); if (tmp) { error("unrecognized filesystem feature '%s'", tmp); free(orig); goto error; } free(orig); if (features & BTRFS_FEATURE_LIST_ALL) { btrfs_list_all_fs_features(0); goto success; } break; } case 'R': { char *orig = strdup(optarg); char *tmp = orig; tmp = btrfs_parse_runtime_features(tmp, &runtime_features); if (tmp) { error("unrecognized runtime feature '%s'", tmp); free(orig); goto error; } free(orig); if (runtime_features & BTRFS_FEATURE_LIST_ALL) { btrfs_list_all_runtime_features(0); goto success; } break; } case 's': sectorsize = parse_size_from_string(optarg); break; case 'b': block_count = parse_size_from_string(optarg); zero_end = false; break; case 'v': bconf_be_verbose(); break; case 'V': printf("mkfs.btrfs, part of %s\n", PACKAGE_STRING); goto success; case 'r': source_dir = optarg; source_dir_set = true; break; case 'U': strncpy(fs_uuid, optarg, BTRFS_UUID_UNPARSED_SIZE - 1); break; case 'K': discard = false; break; case 'q': bconf_be_quiet(); break; case GETOPT_VAL_SHRINK: shrink_rootdir = true; break; case GETOPT_VAL_CHECKSUM: csum_type = parse_csum_type(optarg); break; case GETOPT_VAL_GLOBAL_ROOTS: nr_global_roots = (int)arg_strtou64(optarg); break; case GETOPT_VAL_HELP: default: print_usage(c != GETOPT_VAL_HELP); } } if (bconf.verbose) { printf("%s\n", PACKAGE_STRING); printf("See %s for more information.\n\n", PACKAGE_URL); } if (!sectorsize) sectorsize = (u32)sysconf(_SC_PAGESIZE); if (btrfs_check_sectorsize(sectorsize)) goto error; if (!nodesize) nodesize = max_t(u32, sectorsize, BTRFS_MKFS_DEFAULT_NODE_SIZE); stripesize = sectorsize; saved_optind = optind; dev_cnt = argc - optind; if (dev_cnt == 0) print_usage(1); zoned = !!(features & BTRFS_FEATURE_INCOMPAT_ZONED); if (source_dir_set && dev_cnt > 1) { error("the option -r is limited to a single device"); goto error; } if (shrink_rootdir && !source_dir_set) { error("the option --shrink must be used with --rootdir"); goto error; } if (*fs_uuid) { uuid_t dummy_uuid; if (uuid_parse(fs_uuid, dummy_uuid) != 0) { error("could not parse UUID: %s", fs_uuid); goto error; } if (!test_uuid_unique(fs_uuid)) { error("non-unique UUID: %s", fs_uuid); goto error; } } while (dev_cnt-- > 0) { file = argv[optind++]; if (source_dir_set && path_exists(file) == 0) ret = 0; else if (path_is_block_device(file) == 1) ret = test_dev_for_mkfs(file, force_overwrite); else ret = test_status_for_mkfs(file, force_overwrite); if (ret) goto error; } optind = saved_optind; dev_cnt = argc - optind; file = argv[optind++]; ssd = is_ssd(file); if (zoned) { if (!zone_size(file)) { error("zoned: %s: zone size undefined", file); exit(1); } } else if (zoned_model(file) == ZONED_HOST_MANAGED) { if (bconf.verbose) printf( "Zoned: %s: host-managed device detected, setting zoned feature\n", file); zoned = true; features |= BTRFS_FEATURE_INCOMPAT_ZONED; } /* * Set default profiles according to number of added devices. * For mixed groups defaults are single/single. */ if (!mixed) { u64 tmp; if (!metadata_profile_opt) { if (dev_cnt > 1) tmp = BTRFS_MKFS_DEFAULT_META_MULTI_DEVICE; else tmp = BTRFS_MKFS_DEFAULT_META_ONE_DEVICE; metadata_profile = tmp; } if (!data_profile_opt) { if (dev_cnt > 1) tmp = BTRFS_MKFS_DEFAULT_DATA_MULTI_DEVICE; else tmp = BTRFS_MKFS_DEFAULT_DATA_ONE_DEVICE; data_profile = tmp; } } else { if (metadata_profile_opt || data_profile_opt) { if (metadata_profile != data_profile) { error( "with mixed block groups data and metadata profiles must be the same"); goto error; } } if (!nodesize_forced) nodesize = sectorsize; } /* * FS features that can be set by other means than -O * just set the bit here */ if (mixed) features |= BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS; if ((data_profile | metadata_profile) & BTRFS_BLOCK_GROUP_RAID56_MASK) { features |= BTRFS_FEATURE_INCOMPAT_RAID56; warning("RAID5/6 support has known problems is strongly discouraged\n" "\t to be used besides testing or evaluation.\n"); } if ((data_profile | metadata_profile) & (BTRFS_BLOCK_GROUP_RAID1C3 | BTRFS_BLOCK_GROUP_RAID1C4)) { features |= BTRFS_FEATURE_INCOMPAT_RAID1C34; } /* Extent tree v2 comes with a set of mandatory features. */ if (features & BTRFS_FEATURE_INCOMPAT_EXTENT_TREE_V2) { features |= BTRFS_FEATURE_INCOMPAT_NO_HOLES; runtime_features |= BTRFS_RUNTIME_FEATURE_FREE_SPACE_TREE; if (!nr_global_roots) { error("you must set a non-zero num-global-roots value"); exit(1); } } /* Block group tree feature requires no-holes and free-space-tree. */ if (runtime_features & BTRFS_RUNTIME_FEATURE_BLOCK_GROUP_TREE && (!(features & BTRFS_FEATURE_INCOMPAT_NO_HOLES) || !(runtime_features & BTRFS_RUNTIME_FEATURE_FREE_SPACE_TREE))) { error("block group tree requires no-holes and free-space-tree features"); exit(1); } if (zoned) { if (source_dir_set) { error("the option -r and zoned mode are incompatible"); exit(1); } if (features & BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS) { error("cannot enable mixed-bg in zoned mode"); exit(1); } if (features & BTRFS_FEATURE_INCOMPAT_RAID56) { error("cannot enable RAID5/6 in zoned mode"); exit(1); } } if (btrfs_check_nodesize(nodesize, sectorsize, features)) goto error; if (sectorsize < sizeof(struct btrfs_super_block)) { error("sectorsize smaller than superblock: %u < %zu", sectorsize, sizeof(struct btrfs_super_block)); goto error; } min_dev_size = btrfs_min_dev_size(nodesize, mixed, metadata_profile, data_profile); /* * Enlarge the destination file or create a new one, using the size * calculated from source dir. * * This must be done before minimal device size checks. */ if (source_dir_set) { int oflags = O_RDWR; struct stat statbuf; if (path_exists(file) == 0) oflags |= O_CREAT; fd = open(file, oflags, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH); if (fd < 0) { error("unable to open %s: %m", file); goto error; } ret = fstat(fd, &statbuf); if (ret < 0) { error("unable to stat %s: %m", file); ret = -errno; goto error; } /* * Block_count not specified, use file/device size first. * Or we will always use source_dir_size calculated for mkfs. */ if (!block_count) block_count = btrfs_device_size(fd, &statbuf); source_dir_size = btrfs_mkfs_size_dir(source_dir, sectorsize, min_dev_size, metadata_profile, data_profile); if (block_count < source_dir_size) block_count = source_dir_size; ret = zero_output_file(fd, block_count); if (ret) { error("unable to zero the output file"); close(fd); goto error; } /* our "device" is the new image file */ dev_block_count = block_count; close(fd); } /* Check device/block_count after the nodesize is determined */ if (block_count && block_count < min_dev_size) { error("size %llu is too small to make a usable filesystem", block_count); error("minimum size for btrfs filesystem is %llu", min_dev_size); goto error; } /* * 2 zones for the primary superblock * 1 zone for the system block group * 1 zone for a metadata block group * 1 zone for a data block group */ if (zoned && block_count && block_count < 5 * zone_size(file)) { error("size %llu is too small to make a usable filesystem", block_count); error("minimum size for a zoned btrfs filesystem is %llu", min_dev_size); goto error; } for (i = saved_optind; i < saved_optind + dev_cnt; i++) { char *path; path = argv[i]; ret = test_minimum_size(path, min_dev_size); if (ret < 0) { error("failed to check size for %s: %m", path); goto error; } if (ret > 0) { error("'%s' is too small to make a usable filesystem", path); error("minimum size for each btrfs device is %llu", min_dev_size); goto error; } } ret = test_num_disk_vs_raid(metadata_profile, data_profile, dev_cnt, mixed, ssd); if (ret) goto error; if (zoned && (!zoned_profile_supported(BTRFS_BLOCK_GROUP_METADATA | metadata_profile) || !zoned_profile_supported(BTRFS_BLOCK_GROUP_DATA | data_profile))) { error("zoned mode does not yet support RAID/DUP profiles, please specify '-d single -m single' manually"); goto error; } dev_cnt--; oflags = O_RDWR; if (zoned && zoned_model(file) == ZONED_HOST_MANAGED) oflags |= O_DIRECT; /* * Open without O_EXCL so that the problem should not occur by the * following operation in kernel: * (btrfs_register_one_device() fails if O_EXCL is on) */ fd = open(file, oflags); if (fd < 0) { error("unable to open %s: %m", file); goto error; } ret = btrfs_prepare_device(fd, file, &dev_block_count, block_count, (zero_end ? PREP_DEVICE_ZERO_END : 0) | (discard ? PREP_DEVICE_DISCARD : 0) | (bconf.verbose ? PREP_DEVICE_VERBOSE : 0) | (zoned ? PREP_DEVICE_ZONED : 0)); if (ret) goto error; if (block_count && block_count > dev_block_count) { error("%s is smaller than requested size, expected %llu, found %llu", file, (unsigned long long)block_count, (unsigned long long)dev_block_count); goto error; } /* To create the first block group and chunk 0 in make_btrfs */ system_group_size = zoned ? zone_size(file) : BTRFS_MKFS_SYSTEM_GROUP_SIZE; if (dev_block_count < system_group_size) { error("device is too small to make filesystem, must be at least %llu", (unsigned long long)system_group_size); goto error; } if (btrfs_bg_type_to_tolerated_failures(metadata_profile) < btrfs_bg_type_to_tolerated_failures(data_profile)) warning("metadata has lower redundancy than data!\n"); printf("NOTE: several default settings have changed in version 5.15, please make sure\n"); printf(" this does not affect your deployments:\n"); printf(" - DUP for metadata (-m dup)\n"); printf(" - enabled no-holes (-O no-holes)\n"); printf(" - enabled free-space-tree (-R free-space-tree)\n"); printf("\n"); mkfs_cfg.label = label; memcpy(mkfs_cfg.fs_uuid, fs_uuid, sizeof(mkfs_cfg.fs_uuid)); mkfs_cfg.num_bytes = dev_block_count; mkfs_cfg.nodesize = nodesize; mkfs_cfg.sectorsize = sectorsize; mkfs_cfg.stripesize = stripesize; mkfs_cfg.features = features; mkfs_cfg.runtime_features = runtime_features; mkfs_cfg.csum_type = csum_type; mkfs_cfg.leaf_data_size = __BTRFS_LEAF_DATA_SIZE(nodesize); if (zoned) mkfs_cfg.zone_size = zone_size(file); else mkfs_cfg.zone_size = 0; ret = make_btrfs(fd, &mkfs_cfg); if (ret) { errno = -ret; error("error during mkfs: %m"); goto error; } ocf.filename = file; ocf.flags = OPEN_CTREE_WRITES | OPEN_CTREE_TEMPORARY_SUPER; fs_info = open_ctree_fs_info(&ocf); if (!fs_info) { error("open ctree failed"); goto error; } close(fd); fd = -1; root = fs_info->fs_root; ret = create_metadata_block_groups(root, mixed, &allocation); if (ret) { error("failed to create default block groups: %d", ret); goto error; } trans = btrfs_start_transaction(root, 1); if (IS_ERR(trans)) { error("failed to start transaction"); goto error; } ret = create_data_block_groups(trans, root, mixed, &allocation); if (ret) { error("failed to create default data block groups: %d", ret); goto error; } if (features & BTRFS_FEATURE_INCOMPAT_EXTENT_TREE_V2) { ret = create_global_roots(trans, nr_global_roots); if (ret) { error("failed to create global roots: %d", ret); goto error; } } ret = make_root_dir(trans, root); if (ret) { error("failed to setup the root directory: %d", ret); goto error; } ret = btrfs_commit_transaction(trans, root); if (ret) { error("unable to commit transaction: %d", ret); goto out; } trans = btrfs_start_transaction(root, 1); if (IS_ERR(trans)) { error("failed to start transaction"); goto error; } if (dev_cnt == 0) goto raid_groups; while (dev_cnt-- > 0) { file = argv[optind++]; /* * open without O_EXCL so that the problem should not * occur by the following processing. * (btrfs_register_one_device() fails if O_EXCL is on) */ fd = open(file, O_RDWR); if (fd < 0) { error("unable to open %s: %m", file); goto error; } ret = btrfs_device_already_in_root(root, fd, BTRFS_SUPER_INFO_OFFSET); if (ret) { error("skipping duplicate device %s in the filesystem", file); close(fd); continue; } ret = btrfs_prepare_device(fd, file, &dev_block_count, block_count, (bconf.verbose ? PREP_DEVICE_VERBOSE : 0) | (zero_end ? PREP_DEVICE_ZERO_END : 0) | (discard ? PREP_DEVICE_DISCARD : 0) | (zoned ? PREP_DEVICE_ZONED : 0)); if (ret) { goto error; } ret = btrfs_add_to_fsid(trans, root, fd, file, dev_block_count, sectorsize, sectorsize, sectorsize); if (ret) { error("unable to add %s to filesystem: %d", file, ret); goto error; } if (bconf.verbose >= 2) { struct btrfs_device *device; device = container_of(fs_info->fs_devices->devices.next, struct btrfs_device, dev_list); printf("adding device %s id %llu\n", file, (unsigned long long)device->devid); } } raid_groups: ret = create_raid_groups(trans, root, data_profile, metadata_profile, mixed, &allocation); if (ret) { error("unable to create raid groups: %d", ret); goto out; } /* * Commit current transaction so we can COW all existing tree blocks * to newly created raid groups. * As currently we use btrfs_search_slot() to COW tree blocks in * recow_roots(), if a tree block is already modified in current trans, * it won't be re-COWed, thus it will stay in temporary chunks. */ ret = btrfs_commit_transaction(trans, root); if (ret) { errno = -ret; error("unable to commit transaction before recowing trees: %m"); goto out; } trans = btrfs_start_transaction(root, 1); if (IS_ERR(trans)) { errno = -PTR_ERR(trans); error("failed to start transaction: %m"); goto error; } /* COW all tree blocks to newly created chunks */ ret = recow_roots(trans, root); if (ret) { errno = -ret; error("unable to COW tree blocks to new profiles: %m"); goto out; } ret = create_data_reloc_tree(trans); if (ret) { error("unable to create data reloc tree: %d", ret); goto out; } ret = create_uuid_tree(trans); if (ret) warning( "unable to create uuid tree, will be created after mount: %d", ret); ret = btrfs_commit_transaction(trans, root); if (ret) { error("unable to commit transaction: %d", ret); goto out; } ret = cleanup_temp_chunks(fs_info, &allocation, data_profile, metadata_profile, metadata_profile); if (ret < 0) { error("failed to cleanup temporary chunks: %d", ret); goto out; } if (source_dir_set) { ret = btrfs_mkfs_fill_dir(source_dir, root, bconf.verbose); if (ret) { error("error while filling filesystem: %d", ret); goto out; } if (shrink_rootdir) { ret = btrfs_mkfs_shrink_fs(fs_info, &shrink_size, shrink_rootdir); if (ret < 0) { error("error while shrinking filesystem: %d", ret); goto out; } } } if (runtime_features & BTRFS_RUNTIME_FEATURE_QUOTA) { ret = setup_quota_root(fs_info); if (ret < 0) { error("failed to initialize quota: %d (%m)", ret); goto out; } } if (bconf.verbose) { char features_buf[64]; update_chunk_allocation(fs_info, &allocation); printf("Label: %s\n", label); printf("UUID: %s\n", mkfs_cfg.fs_uuid); printf("Node size: %u\n", nodesize); printf("Sector size: %u\n", sectorsize); printf("Filesystem size: %s\n", pretty_size(btrfs_super_total_bytes(fs_info->super_copy))); printf("Block group profiles:\n"); if (allocation.data) printf(" Data: %-8s %16s\n", btrfs_group_profile_str(data_profile), pretty_size(allocation.data)); if (allocation.metadata) printf(" Metadata: %-8s %16s\n", btrfs_group_profile_str(metadata_profile), pretty_size(allocation.metadata)); if (allocation.mixed) printf(" Data+Metadata: %-8s %16s\n", btrfs_group_profile_str(data_profile), pretty_size(allocation.mixed)); printf(" System: %-8s %16s\n", btrfs_group_profile_str(metadata_profile), pretty_size(allocation.system)); printf("SSD detected: %s\n", ssd ? "yes" : "no"); printf("Zoned device: %s\n", zoned ? "yes" : "no"); if (zoned) printf(" Zone size: %s\n", pretty_size(fs_info->zone_size)); btrfs_parse_fs_features_to_string(features_buf, features); printf("Incompat features: %s\n", features_buf); btrfs_parse_runtime_features_to_string(features_buf, runtime_features); printf("Runtime features: %s\n", features_buf); printf("Checksum: %s", btrfs_super_csum_name(mkfs_cfg.csum_type)); printf("\n"); list_all_devices(root); if (mkfs_cfg.csum_type == BTRFS_CSUM_TYPE_SHA256) { printf( "NOTE: you may need to manually load kernel module implementing accelerated SHA256 in case\n" " the generic implementation is built-in, before mount. Check lsmod or /proc/crypto\n\n" ); } } /* * The filesystem is now fully set up, commit the remaining changes and * fix the signature as the last step before closing the devices. */ fs_info->finalize_on_close = 1; out: close_ret = close_ctree(root); if (!close_ret) { optind = saved_optind; dev_cnt = argc - optind; while (dev_cnt-- > 0) { file = argv[optind++]; if (path_is_block_device(file) == 1) btrfs_register_one_device(file); } } if (!ret && close_ret) { ret = close_ret; error("failed to close ctree, the filesystem may be inconsistent: %d", ret); } btrfs_close_all_devices(); free(label); return !!ret; error: if (fd > 0) close(fd); free(label); exit(1); success: exit(0); }