/* * 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 "androidcompat.h" #include #include #include "ioctl.h" #include #include /* #include included via androidcompat.h */ #include #include #include #include #include #include #include #include "ctree.h" #include "disk-io.h" #include "volumes.h" #include "transaction.h" #include "utils.h" #include "list_sort.h" #include "help.h" #include "mkfs/common.h" #include "mkfs/rootdir.h" #include "fsfeatures.h" static int verbose = 1; struct mkfs_allocation { u64 data; u64 metadata; u64 mixed; u64 system; }; static int create_metadata_block_groups(struct btrfs_root *root, int mixed, struct mkfs_allocation *allocation) { struct btrfs_fs_info *fs_info = root->fs_info; struct btrfs_trans_handle *trans; u64 bytes_used; u64 chunk_start = 0; u64 chunk_size = 0; int ret; trans = btrfs_start_transaction(root, 1); BUG_ON(IS_ERR(trans)); bytes_used = btrfs_super_bytes_used(fs_info->super_copy); root->fs_info->system_allocs = 1; /* * First temporary system chunk must match the chunk layout * created in make_btrfs(). */ ret = btrfs_make_block_group(trans, fs_info, bytes_used, BTRFS_BLOCK_GROUP_SYSTEM, BTRFS_BLOCK_RESERVED_1M_FOR_SUPER, BTRFS_MKFS_SYSTEM_GROUP_SIZE); allocation->system += BTRFS_MKFS_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, int 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) { 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 extent_buffer *tmp; int ret; if (trans->transid != btrfs_root_generation(&root->root_item)) { extent_buffer_get(root->node); ret = __btrfs_cow_block(trans, root, root->node, NULL, 0, &tmp, 0, 0); if (ret) return ret; free_extent_buffer(tmp); } return 0; } 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->extent_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; ret = __recow_root(trans, info->csum_root); 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, int mixed, struct mkfs_allocation *allocation) { int ret; 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; } ret = recow_roots(trans, root); return ret; } static int create_tree(struct btrfs_trans_handle *trans, struct btrfs_root *root, u64 objectid) { struct btrfs_key location; struct btrfs_root_item root_item; struct extent_buffer *tmp; u8 uuid[BTRFS_UUID_SIZE] = {0}; int ret; ret = btrfs_copy_root(trans, root, root->node, &tmp, objectid); if (ret) return 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); /* clear uuid and o/ctime of source tree */ memcpy(root_item.uuid, uuid, BTRFS_UUID_SIZE); btrfs_set_stack_timespec_sec(&root_item.otime, 0); btrfs_set_stack_timespec_sec(&root_item.ctime, 0); free_extent_buffer(tmp); location.objectid = objectid; location.type = BTRFS_ROOT_ITEM_KEY; location.offset = 0; ret = btrfs_insert_root(trans, root->fs_info->tree_root, &location, &root_item); 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, 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-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-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|--version print the mkfs.btrfs version and exit\n"); printf("\t--help print this help and exit\n"); printf(" deprecated:\n"); printf("\t-A|--alloc-start START the offset to start the filesystem\n"); printf("\t-l|--leafsize SIZE deprecated, alias for nodesize\n"); exit(ret); } static u64 parse_profile(const char *s) { if (strcasecmp(s, "raid0") == 0) { return BTRFS_BLOCK_GROUP_RAID0; } else if (strcasecmp(s, "raid1") == 0) { return BTRFS_BLOCK_GROUP_RAID1; } else if (strcasecmp(s, "raid5") == 0) { return BTRFS_BLOCK_GROUP_RAID5; } else if (strcasecmp(s, "raid6") == 0) { return BTRFS_BLOCK_GROUP_RAID6; } else if (strcasecmp(s, "raid10") == 0) { return BTRFS_BLOCK_GROUP_RAID10; } else if (strcasecmp(s, "dup") == 0) { return BTRFS_BLOCK_GROUP_DUP; } else if (strcasecmp(s, "single") == 0) { return 0; } else { error("unknown profile %s", s); exit(1); } /* not reached */ return 0; } 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 int is_ssd(const char *file) { blkid_probe probe; char wholedisk[PATH_MAX]; char sysfs_path[PATH_MAX]; dev_t devno; int fd; char rotational; int ret; probe = blkid_new_probe_from_filename(file); if (!probe) return 0; /* Device number of this disk (possibly a partition) */ devno = blkid_probe_get_devno(probe); if (!devno) { blkid_free_probe(probe); return 0; } /* Get whole disk name (not full path) for this devno */ ret = blkid_devno_to_wholedisk(devno, wholedisk, sizeof(wholedisk), NULL); if (ret) { blkid_free_probe(probe); return 0; } snprintf(sysfs_path, PATH_MAX, "/sys/block/%s/queue/rotational", wholedisk); blkid_free_probe(probe); fd = open(sysfs_path, O_RDONLY); if (fd < 0) { return 0; } if (read(fd, &rotational, 1) < 1) { close(fd); return 0; } close(fd); 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_disk_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_disk_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 = fs_info->extent_root; 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_disk_block_group_flags(path.nodes[0], bgi); ret = btrfs_free_block_group(trans, fs_info, 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_cache *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->key.offset; else if (bg_cache->flags & BTRFS_BLOCK_GROUP_DATA) allocation->data += bg_cache->key.offset; else if (bg_cache->flags & BTRFS_BLOCK_GROUP_METADATA) allocation->metadata += bg_cache->key.offset; else allocation->system += bg_cache->key.offset; search_start = bg_cache->key.objectid + bg_cache->key.offset; } } int main(int argc, char **argv) { char *file; struct btrfs_root *root; struct btrfs_fs_info *fs_info; struct btrfs_trans_handle *trans; char *label = NULL; u64 block_count = 0; u64 dev_block_count = 0; u64 alloc_start = 0; u64 metadata_profile = 0; u64 data_profile = 0; u32 nodesize = max_t(u32, sysconf(_SC_PAGESIZE), BTRFS_MKFS_DEFAULT_NODE_SIZE); u32 sectorsize = 4096; u32 stripesize = 4096; int zero_end = 1; int fd = -1; int ret = 0; int close_ret; int i; int mixed = 0; int nodesize_forced = 0; int data_profile_opt = 0; int metadata_profile_opt = 0; int discard = 1; int ssd = 0; int force_overwrite = 0; 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; struct mkfs_allocation allocation = { 0 }; struct btrfs_mkfs_config mkfs_cfg; while(1) { int c; enum { GETOPT_VAL_SHRINK = 257 }; static const struct option long_options[] = { { "alloc-start", required_argument, NULL, 'A'}, { "byte-count", required_argument, NULL, 'b' }, { "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' }, { "uuid", required_argument, NULL, 'U' }, { "quiet", 0, NULL, 'q' }, { "shrink", no_argument, NULL, GETOPT_VAL_SHRINK }, { "help", no_argument, NULL, GETOPT_VAL_HELP }, { NULL, 0, NULL, 0} }; c = getopt_long(argc, argv, "A:b:fl:n:s:m:d:L:O:r:U:VMKq", long_options, NULL); if (c < 0) break; switch(c) { case 'A': alloc_start = parse_size(optarg); break; case 'f': force_overwrite = 1; break; case 'd': data_profile = parse_profile(optarg); data_profile_opt = 1; break; case 'l': warning("--leafsize is deprecated, use --nodesize"); /* fall through */ case 'n': nodesize = parse_size(optarg); nodesize_forced = 1; break; case 'L': label = parse_label(optarg); break; case 'm': metadata_profile = parse_profile(optarg); metadata_profile_opt = 1; break; case 'M': mixed = 1; 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 's': sectorsize = parse_size(optarg); break; case 'b': block_count = parse_size(optarg); zero_end = 0; 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 = 0; break; case 'q': verbose = 0; break; case GETOPT_VAL_SHRINK: shrink_rootdir = true; break; case GETOPT_VAL_HELP: default: print_usage(c != GETOPT_VAL_HELP); } } if (verbose) { printf("%s\n", PACKAGE_STRING); printf("See %s for more information.\n\n", PACKAGE_URL); } sectorsize = max(sectorsize, (u32)sysconf(_SC_PAGESIZE)); stripesize = sectorsize; saved_optind = optind; dev_cnt = argc - optind; if (dev_cnt == 0) print_usage(1); 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 && is_path_exist(file) == 0) ret = 0; else if (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); /* * Set default profiles according to number of added devices. * For mixed groups defaults are single/single. */ if (!mixed) { if (!metadata_profile_opt) { if (dev_cnt == 1 && ssd && verbose) printf("Detected a SSD, turning off metadata " "duplication. Mkfs with -m dup if you want to " "force metadata duplication.\n"); metadata_profile = (dev_cnt > 1) ? BTRFS_BLOCK_GROUP_RAID1 : (ssd) ? 0: BTRFS_BLOCK_GROUP_DUP; } if (!data_profile_opt) { data_profile = (dev_cnt > 1) ? BTRFS_BLOCK_GROUP_RAID0 : 0; /* raid0 or single */ } } else { u32 best_nodesize = max_t(u32, sysconf(_SC_PAGESIZE), sectorsize); 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 = best_nodesize; } /* * 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_RAID5 | BTRFS_BLOCK_GROUP_RAID6)) { features |= BTRFS_FEATURE_INCOMPAT_RAID56; } 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 (is_path_exist(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; } 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; dev_cnt--; /* * 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, O_RDWR); 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) | (verbose ? PREP_DEVICE_VERBOSE : 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 */ if (dev_block_count < BTRFS_MKFS_SYSTEM_GROUP_SIZE) { error("device is too small to make filesystem, must be at least %llu", (unsigned long long)BTRFS_MKFS_SYSTEM_GROUP_SIZE); goto error; } if (group_profile_max_safe_loss(metadata_profile) < group_profile_max_safe_loss(data_profile)){ warning("metadata has lower redundancy than data!\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; ret = make_btrfs(fd, &mkfs_cfg); if (ret) { errno = -ret; error("error during mkfs: %m"); goto error; } fs_info = open_ctree_fs_info(file, 0, 0, 0, OPEN_CTREE_WRITES | OPEN_CTREE_TEMPORARY_SUPER); if (!fs_info) { error("open ctree failed"); goto error; } close(fd); fd = -1; root = fs_info->fs_root; fs_info->alloc_start = alloc_start; 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; } 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, (verbose ? PREP_DEVICE_VERBOSE : 0) | (zero_end ? PREP_DEVICE_ZERO_END : 0) | (discard ? PREP_DEVICE_DISCARD : 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 out; } if (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; } ret = create_tree(trans, root, BTRFS_DATA_RELOC_TREE_OBJECTID); if (ret) { error("unable to create data reloc tree: %d", ret); goto out; } ret = create_tree(trans, root, BTRFS_UUID_TREE_OBJECTID); 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, 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 (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"); btrfs_parse_features_to_string(features_buf, features); printf("Incompat features: %s", features_buf); printf("\n"); list_all_devices(root); } /* * 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 (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); }