| /* |
| * 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 <sys/ioctl.h> |
| #include <sys/mount.h> |
| #include "ioctl.h" |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <sys/types.h> |
| #include <sys/stat.h> |
| #include <sys/dir.h> |
| #include <fcntl.h> |
| #include <unistd.h> |
| #include <getopt.h> |
| #include <uuid/uuid.h> |
| #include <ctype.h> |
| #include <sys/xattr.h> |
| #include <limits.h> |
| #include <linux/limits.h> |
| #include <blkid/blkid.h> |
| #include <ftw.h> |
| #include "ctree.h" |
| #include "disk-io.h" |
| #include "volumes.h" |
| #include "transaction.h" |
| #include "utils.h" |
| |
| static u64 index_cnt = 2; |
| |
| #define DEFAULT_MKFS_FEATURES (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF \ |
| | BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA) |
| |
| #define DEFAULT_MKFS_LEAF_SIZE 16384 |
| |
| struct directory_name_entry { |
| char *dir_name; |
| char *path; |
| ino_t inum; |
| struct list_head list; |
| }; |
| |
| static int make_root_dir(struct btrfs_root *root, int mixed) |
| { |
| struct btrfs_trans_handle *trans; |
| struct btrfs_key location; |
| u64 bytes_used; |
| u64 chunk_start = 0; |
| u64 chunk_size = 0; |
| int ret; |
| |
| trans = btrfs_start_transaction(root, 1); |
| bytes_used = btrfs_super_bytes_used(root->fs_info->super_copy); |
| |
| root->fs_info->system_allocs = 1; |
| ret = btrfs_make_block_group(trans, root, bytes_used, |
| BTRFS_BLOCK_GROUP_SYSTEM, |
| BTRFS_FIRST_CHUNK_TREE_OBJECTID, |
| 0, BTRFS_MKFS_SYSTEM_GROUP_SIZE); |
| BUG_ON(ret); |
| |
| if (mixed) { |
| ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root, |
| &chunk_start, &chunk_size, |
| BTRFS_BLOCK_GROUP_METADATA | |
| BTRFS_BLOCK_GROUP_DATA); |
| if (ret == -ENOSPC) { |
| fprintf(stderr, |
| "no space to alloc data/metadata chunk\n"); |
| goto err; |
| } |
| BUG_ON(ret); |
| ret = btrfs_make_block_group(trans, root, 0, |
| BTRFS_BLOCK_GROUP_METADATA | |
| BTRFS_BLOCK_GROUP_DATA, |
| BTRFS_FIRST_CHUNK_TREE_OBJECTID, |
| chunk_start, chunk_size); |
| BUG_ON(ret); |
| printf("Created a data/metadata chunk of size %llu\n", chunk_size); |
| } else { |
| ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root, |
| &chunk_start, &chunk_size, |
| BTRFS_BLOCK_GROUP_METADATA); |
| if (ret == -ENOSPC) { |
| fprintf(stderr, "no space to alloc metadata chunk\n"); |
| goto err; |
| } |
| BUG_ON(ret); |
| ret = btrfs_make_block_group(trans, root, 0, |
| BTRFS_BLOCK_GROUP_METADATA, |
| BTRFS_FIRST_CHUNK_TREE_OBJECTID, |
| chunk_start, chunk_size); |
| BUG_ON(ret); |
| } |
| |
| root->fs_info->system_allocs = 0; |
| btrfs_commit_transaction(trans, root); |
| trans = btrfs_start_transaction(root, 1); |
| BUG_ON(!trans); |
| |
| if (!mixed) { |
| ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root, |
| &chunk_start, &chunk_size, |
| BTRFS_BLOCK_GROUP_DATA); |
| if (ret == -ENOSPC) { |
| fprintf(stderr, "no space to alloc data chunk\n"); |
| goto err; |
| } |
| BUG_ON(ret); |
| ret = btrfs_make_block_group(trans, root, 0, |
| BTRFS_BLOCK_GROUP_DATA, |
| BTRFS_FIRST_CHUNK_TREE_OBJECTID, |
| chunk_start, chunk_size); |
| BUG_ON(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; |
| |
| btrfs_commit_transaction(trans, root); |
| err: |
| return ret; |
| } |
| |
| static void __recow_root(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root) |
| { |
| int ret; |
| struct extent_buffer *tmp; |
| |
| 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); |
| BUG_ON(ret); |
| free_extent_buffer(tmp); |
| } |
| } |
| |
| static void recow_roots(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root) |
| { |
| struct btrfs_fs_info *info = root->fs_info; |
| |
| __recow_root(trans, info->fs_root); |
| __recow_root(trans, info->tree_root); |
| __recow_root(trans, info->extent_root); |
| __recow_root(trans, info->chunk_root); |
| __recow_root(trans, info->dev_root); |
| __recow_root(trans, info->csum_root); |
| } |
| |
| static int create_one_raid_group(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, u64 type) |
| { |
| u64 chunk_start; |
| u64 chunk_size; |
| int ret; |
| |
| ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root, |
| &chunk_start, &chunk_size, type); |
| if (ret == -ENOSPC) { |
| fprintf(stderr, "not enough free space\n"); |
| exit(1); |
| } |
| BUG_ON(ret); |
| ret = btrfs_make_block_group(trans, root->fs_info->extent_root, 0, |
| type, BTRFS_FIRST_CHUNK_TREE_OBJECTID, |
| chunk_start, chunk_size); |
| BUG_ON(ret); |
| return ret; |
| } |
| |
| static int create_raid_groups(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, u64 data_profile, |
| int data_profile_opt, u64 metadata_profile, |
| int mixed) |
| { |
| u64 num_devices = btrfs_super_num_devices(root->fs_info->super_copy); |
| 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); |
| BUG_ON(ret); |
| |
| if (mixed) |
| meta_flags |= BTRFS_BLOCK_GROUP_DATA; |
| |
| ret = create_one_raid_group(trans, root, meta_flags | |
| metadata_profile); |
| BUG_ON(ret); |
| |
| } |
| if (!mixed && num_devices > 1 && data_profile) { |
| ret = create_one_raid_group(trans, root, |
| BTRFS_BLOCK_GROUP_DATA | |
| data_profile); |
| BUG_ON(ret); |
| } |
| recow_roots(trans, root); |
| |
| return 0; |
| } |
| |
| static int create_data_reloc_tree(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root) |
| { |
| struct btrfs_key location; |
| struct btrfs_root_item root_item; |
| struct extent_buffer *tmp; |
| u64 objectid = BTRFS_DATA_RELOC_TREE_OBJECTID; |
| int ret; |
| |
| ret = btrfs_copy_root(trans, root, root->node, &tmp, 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); |
| |
| 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); |
| BUG_ON(ret); |
| return 0; |
| } |
| |
| |
| static void print_usage(void) __attribute__((noreturn)); |
| static void print_usage(void) |
| { |
| fprintf(stderr, "usage: mkfs.btrfs [options] dev [ dev ... ]\n"); |
| fprintf(stderr, "options:\n"); |
| fprintf(stderr, "\t -A --alloc-start the offset to start the FS\n"); |
| fprintf(stderr, "\t -b --byte-count total number of bytes in the FS\n"); |
| fprintf(stderr, "\t -d --data data profile, raid0, raid1, raid5, raid6, raid10, dup or single\n"); |
| fprintf(stderr, "\t -f --force force overwrite of existing filesystem\n"); |
| fprintf(stderr, "\t -l --leafsize size of btree leaves\n"); |
| fprintf(stderr, "\t -L --label set a label\n"); |
| fprintf(stderr, "\t -m --metadata metadata profile, values like data profile\n"); |
| fprintf(stderr, "\t -M --mixed mix metadata and data together\n"); |
| fprintf(stderr, "\t -n --nodesize size of btree nodes\n"); |
| fprintf(stderr, "\t -s --sectorsize min block allocation (may not mountable by current kernel)\n"); |
| fprintf(stderr, "\t -r --rootdir the source directory\n"); |
| fprintf(stderr, "\t -K --nodiscard do not perform whole device TRIM\n"); |
| fprintf(stderr, "\t -O --features comma separated list of filesystem features\n"); |
| fprintf(stderr, "\t -U --uuid specify the filesystem UUID\n"); |
| fprintf(stderr, "\t -V --version print the mkfs.btrfs version and exit\n"); |
| fprintf(stderr, "%s\n", PACKAGE_STRING); |
| exit(1); |
| } |
| |
| static void print_version(void) __attribute__((noreturn)); |
| static void print_version(void) |
| { |
| fprintf(stderr, "mkfs.btrfs, part of %s\n", PACKAGE_STRING); |
| exit(0); |
| } |
| |
| static u64 parse_profile(char *s) |
| { |
| if (strcmp(s, "raid0") == 0) { |
| return BTRFS_BLOCK_GROUP_RAID0; |
| } else if (strcmp(s, "raid1") == 0) { |
| return BTRFS_BLOCK_GROUP_RAID1; |
| } else if (strcmp(s, "raid5") == 0) { |
| return BTRFS_BLOCK_GROUP_RAID5; |
| } else if (strcmp(s, "raid6") == 0) { |
| return BTRFS_BLOCK_GROUP_RAID6; |
| } else if (strcmp(s, "raid10") == 0) { |
| return BTRFS_BLOCK_GROUP_RAID10; |
| } else if (strcmp(s, "dup") == 0) { |
| return BTRFS_BLOCK_GROUP_DUP; |
| } else if (strcmp(s, "single") == 0) { |
| return 0; |
| } else { |
| fprintf(stderr, "Unknown profile %s\n", s); |
| print_usage(); |
| } |
| /* not reached */ |
| return 0; |
| } |
| |
| static char *parse_label(char *input) |
| { |
| int len = strlen(input); |
| |
| if (len >= BTRFS_LABEL_SIZE) { |
| fprintf(stderr, "Label %s is too long (max %d)\n", input, |
| BTRFS_LABEL_SIZE - 1); |
| exit(1); |
| } |
| return strdup(input); |
| } |
| |
| static int add_directory_items(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, u64 objectid, |
| ino_t parent_inum, const char *name, |
| struct stat *st, int *dir_index_cnt) |
| { |
| int ret; |
| int name_len; |
| struct btrfs_key location; |
| u8 filetype = 0; |
| |
| name_len = strlen(name); |
| |
| location.objectid = objectid; |
| location.offset = 0; |
| btrfs_set_key_type(&location, BTRFS_INODE_ITEM_KEY); |
| |
| if (S_ISDIR(st->st_mode)) |
| filetype = BTRFS_FT_DIR; |
| if (S_ISREG(st->st_mode)) |
| filetype = BTRFS_FT_REG_FILE; |
| if (S_ISLNK(st->st_mode)) |
| filetype = BTRFS_FT_SYMLINK; |
| |
| ret = btrfs_insert_dir_item(trans, root, name, name_len, |
| parent_inum, &location, |
| filetype, index_cnt); |
| if (ret) |
| return ret; |
| ret = btrfs_insert_inode_ref(trans, root, name, name_len, |
| objectid, parent_inum, index_cnt); |
| *dir_index_cnt = index_cnt; |
| index_cnt++; |
| |
| return ret; |
| } |
| |
| static int fill_inode_item(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, |
| struct btrfs_inode_item *dst, struct stat *src) |
| { |
| u64 blocks = 0; |
| u64 sectorsize = root->sectorsize; |
| |
| /* |
| * btrfs_inode_item has some reserved fields |
| * and represents on-disk inode entry, so |
| * zero everything to prevent information leak |
| */ |
| memset(dst, 0, sizeof (*dst)); |
| |
| btrfs_set_stack_inode_generation(dst, trans->transid); |
| btrfs_set_stack_inode_size(dst, src->st_size); |
| btrfs_set_stack_inode_nbytes(dst, 0); |
| btrfs_set_stack_inode_block_group(dst, 0); |
| btrfs_set_stack_inode_nlink(dst, src->st_nlink); |
| btrfs_set_stack_inode_uid(dst, src->st_uid); |
| btrfs_set_stack_inode_gid(dst, src->st_gid); |
| btrfs_set_stack_inode_mode(dst, src->st_mode); |
| btrfs_set_stack_inode_rdev(dst, 0); |
| btrfs_set_stack_inode_flags(dst, 0); |
| btrfs_set_stack_timespec_sec(&dst->atime, src->st_atime); |
| btrfs_set_stack_timespec_nsec(&dst->atime, 0); |
| btrfs_set_stack_timespec_sec(&dst->ctime, src->st_ctime); |
| btrfs_set_stack_timespec_nsec(&dst->ctime, 0); |
| btrfs_set_stack_timespec_sec(&dst->mtime, src->st_mtime); |
| btrfs_set_stack_timespec_nsec(&dst->mtime, 0); |
| btrfs_set_stack_timespec_sec(&dst->otime, 0); |
| btrfs_set_stack_timespec_nsec(&dst->otime, 0); |
| |
| if (S_ISDIR(src->st_mode)) { |
| btrfs_set_stack_inode_size(dst, 0); |
| btrfs_set_stack_inode_nlink(dst, 1); |
| } |
| if (S_ISREG(src->st_mode)) { |
| btrfs_set_stack_inode_size(dst, (u64)src->st_size); |
| if (src->st_size <= BTRFS_MAX_INLINE_DATA_SIZE(root)) |
| btrfs_set_stack_inode_nbytes(dst, src->st_size); |
| else { |
| blocks = src->st_size / sectorsize; |
| if (src->st_size % sectorsize) |
| blocks += 1; |
| blocks *= sectorsize; |
| btrfs_set_stack_inode_nbytes(dst, blocks); |
| } |
| } |
| if (S_ISLNK(src->st_mode)) |
| btrfs_set_stack_inode_nbytes(dst, src->st_size + 1); |
| |
| return 0; |
| } |
| |
| static int directory_select(const struct direct *entry) |
| { |
| if ((strncmp(entry->d_name, ".", entry->d_reclen) == 0) || |
| (strncmp(entry->d_name, "..", entry->d_reclen) == 0)) |
| return 0; |
| else |
| return 1; |
| } |
| |
| static void free_namelist(struct direct **files, int count) |
| { |
| int i; |
| |
| if (count < 0) |
| return; |
| |
| for (i = 0; i < count; ++i) |
| free(files[i]); |
| free(files); |
| } |
| |
| static u64 calculate_dir_inode_size(char *dirname) |
| { |
| int count, i; |
| struct direct **files, *cur_file; |
| u64 dir_inode_size = 0; |
| |
| count = scandir(dirname, &files, directory_select, NULL); |
| |
| for (i = 0; i < count; i++) { |
| cur_file = files[i]; |
| dir_inode_size += strlen(cur_file->d_name); |
| } |
| |
| free_namelist(files, count); |
| |
| dir_inode_size *= 2; |
| return dir_inode_size; |
| } |
| |
| static int add_inode_items(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, |
| struct stat *st, char *name, |
| u64 self_objectid, ino_t parent_inum, |
| int dir_index_cnt, struct btrfs_inode_item *inode_ret) |
| { |
| int ret; |
| struct btrfs_key inode_key; |
| struct btrfs_inode_item btrfs_inode; |
| u64 objectid; |
| u64 inode_size = 0; |
| |
| fill_inode_item(trans, root, &btrfs_inode, st); |
| objectid = self_objectid; |
| |
| if (S_ISDIR(st->st_mode)) { |
| inode_size = calculate_dir_inode_size(name); |
| btrfs_set_stack_inode_size(&btrfs_inode, inode_size); |
| } |
| |
| inode_key.objectid = objectid; |
| inode_key.offset = 0; |
| btrfs_set_key_type(&inode_key, BTRFS_INODE_ITEM_KEY); |
| |
| ret = btrfs_insert_inode(trans, root, objectid, &btrfs_inode); |
| |
| *inode_ret = btrfs_inode; |
| return ret; |
| } |
| |
| static int add_xattr_item(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, u64 objectid, |
| const char *file_name) |
| { |
| int ret; |
| int cur_name_len; |
| char xattr_list[XATTR_LIST_MAX]; |
| char *cur_name; |
| char cur_value[XATTR_SIZE_MAX]; |
| char delimiter = '\0'; |
| char *next_location = xattr_list; |
| |
| ret = llistxattr(file_name, xattr_list, XATTR_LIST_MAX); |
| if (ret < 0) { |
| if(errno == ENOTSUP) |
| return 0; |
| fprintf(stderr, "get a list of xattr failed for %s\n", |
| file_name); |
| return ret; |
| } |
| if (ret == 0) |
| return ret; |
| |
| cur_name = strtok(xattr_list, &delimiter); |
| while (cur_name != NULL) { |
| cur_name_len = strlen(cur_name); |
| next_location += cur_name_len + 1; |
| |
| ret = getxattr(file_name, cur_name, cur_value, XATTR_SIZE_MAX); |
| if (ret < 0) { |
| if(errno == ENOTSUP) |
| return 0; |
| fprintf(stderr, "get a xattr value failed for %s attr %s\n", |
| file_name, cur_name); |
| return ret; |
| } |
| |
| ret = btrfs_insert_xattr_item(trans, root, cur_name, |
| cur_name_len, cur_value, |
| ret, objectid); |
| if (ret) { |
| fprintf(stderr, "insert a xattr item failed for %s\n", |
| file_name); |
| } |
| |
| cur_name = strtok(next_location, &delimiter); |
| } |
| |
| return ret; |
| } |
| |
| static int add_symbolic_link(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, |
| u64 objectid, const char *path_name) |
| { |
| int ret; |
| u64 sectorsize = root->sectorsize; |
| char *buf = malloc(sectorsize); |
| |
| ret = readlink(path_name, buf, sectorsize); |
| if (ret <= 0) { |
| fprintf(stderr, "readlink failed for %s\n", path_name); |
| goto fail; |
| } |
| if (ret >= sectorsize) { |
| fprintf(stderr, "symlink too long for %s", path_name); |
| ret = -1; |
| goto fail; |
| } |
| |
| buf[ret] = '\0'; /* readlink does not do it for us */ |
| ret = btrfs_insert_inline_extent(trans, root, objectid, 0, |
| buf, ret + 1); |
| fail: |
| free(buf); |
| return ret; |
| } |
| |
| static int add_file_items(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, |
| struct btrfs_inode_item *btrfs_inode, u64 objectid, |
| ino_t parent_inum, struct stat *st, |
| const char *path_name, int out_fd) |
| { |
| int ret = -1; |
| ssize_t ret_read; |
| u64 bytes_read = 0; |
| struct btrfs_key key; |
| int blocks; |
| u32 sectorsize = root->sectorsize; |
| u64 first_block = 0; |
| u64 file_pos = 0; |
| u64 cur_bytes; |
| u64 total_bytes; |
| struct extent_buffer *eb = NULL; |
| int fd; |
| |
| if (st->st_size == 0) |
| return 0; |
| |
| fd = open(path_name, O_RDONLY); |
| if (fd == -1) { |
| fprintf(stderr, "%s open failed\n", path_name); |
| return ret; |
| } |
| |
| blocks = st->st_size / sectorsize; |
| if (st->st_size % sectorsize) |
| blocks += 1; |
| |
| if (st->st_size <= BTRFS_MAX_INLINE_DATA_SIZE(root)) { |
| char *buffer = malloc(st->st_size); |
| ret_read = pread64(fd, buffer, st->st_size, bytes_read); |
| if (ret_read == -1) { |
| fprintf(stderr, "%s read failed\n", path_name); |
| free(buffer); |
| goto end; |
| } |
| |
| ret = btrfs_insert_inline_extent(trans, root, objectid, 0, |
| buffer, st->st_size); |
| free(buffer); |
| goto end; |
| } |
| |
| /* round up our st_size to the FS blocksize */ |
| total_bytes = (u64)blocks * sectorsize; |
| |
| /* |
| * do our IO in extent buffers so it can work |
| * against any raid type |
| */ |
| eb = malloc(sizeof(*eb) + sectorsize); |
| if (!eb) { |
| ret = -ENOMEM; |
| goto end; |
| } |
| memset(eb, 0, sizeof(*eb) + sectorsize); |
| |
| again: |
| |
| /* |
| * keep our extent size at 1MB max, this makes it easier to work inside |
| * the tiny block groups created during mkfs |
| */ |
| cur_bytes = min(total_bytes, 1024ULL * 1024); |
| ret = btrfs_reserve_extent(trans, root, cur_bytes, 0, 0, (u64)-1, |
| &key, 1); |
| if (ret) |
| goto end; |
| |
| first_block = key.objectid; |
| bytes_read = 0; |
| |
| while (bytes_read < cur_bytes) { |
| |
| memset(eb->data, 0, sectorsize); |
| |
| ret_read = pread64(fd, eb->data, sectorsize, file_pos + bytes_read); |
| if (ret_read == -1) { |
| fprintf(stderr, "%s read failed\n", path_name); |
| goto end; |
| } |
| |
| eb->start = first_block + bytes_read; |
| eb->len = sectorsize; |
| |
| /* |
| * we're doing the csum before we record the extent, but |
| * that's ok |
| */ |
| ret = btrfs_csum_file_block(trans, root->fs_info->csum_root, |
| first_block + bytes_read + sectorsize, |
| first_block + bytes_read, |
| eb->data, sectorsize); |
| if (ret) |
| goto end; |
| |
| ret = write_and_map_eb(trans, root, eb); |
| if (ret) { |
| fprintf(stderr, "output file write failed\n"); |
| goto end; |
| } |
| |
| bytes_read += sectorsize; |
| } |
| |
| if (bytes_read) { |
| ret = btrfs_record_file_extent(trans, root, objectid, btrfs_inode, |
| file_pos, first_block, cur_bytes); |
| if (ret) |
| goto end; |
| |
| } |
| |
| file_pos += cur_bytes; |
| total_bytes -= cur_bytes; |
| |
| if (total_bytes) |
| goto again; |
| |
| end: |
| free(eb); |
| close(fd); |
| return ret; |
| } |
| |
| static char *make_path(char *dir, char *name) |
| { |
| char *path; |
| |
| path = malloc(strlen(dir) + strlen(name) + 2); |
| if (!path) |
| return NULL; |
| strcpy(path, dir); |
| if (dir[strlen(dir) - 1] != '/') |
| strcat(path, "/"); |
| strcat(path, name); |
| return path; |
| } |
| |
| static int traverse_directory(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, char *dir_name, |
| struct directory_name_entry *dir_head, int out_fd) |
| { |
| int ret = 0; |
| |
| struct btrfs_inode_item cur_inode; |
| struct btrfs_inode_item *inode_item; |
| int count, i, dir_index_cnt; |
| struct direct **files; |
| struct stat st; |
| struct directory_name_entry *dir_entry, *parent_dir_entry; |
| struct direct *cur_file; |
| ino_t parent_inum, cur_inum; |
| ino_t highest_inum = 0; |
| char *parent_dir_name; |
| char real_path[PATH_MAX]; |
| struct btrfs_path path; |
| struct extent_buffer *leaf; |
| struct btrfs_key root_dir_key; |
| u64 root_dir_inode_size = 0; |
| |
| /* Add list for source directory */ |
| dir_entry = malloc(sizeof(struct directory_name_entry)); |
| dir_entry->dir_name = dir_name; |
| dir_entry->path = realpath(dir_name, real_path); |
| if (!dir_entry->path) { |
| fprintf(stderr, "get directory real path error\n"); |
| ret = -1; |
| goto fail_no_dir; |
| } |
| |
| parent_inum = highest_inum + BTRFS_FIRST_FREE_OBJECTID; |
| dir_entry->inum = parent_inum; |
| list_add_tail(&dir_entry->list, &dir_head->list); |
| |
| btrfs_init_path(&path); |
| |
| root_dir_key.objectid = btrfs_root_dirid(&root->root_item); |
| root_dir_key.offset = 0; |
| btrfs_set_key_type(&root_dir_key, BTRFS_INODE_ITEM_KEY); |
| ret = btrfs_lookup_inode(trans, root, &path, &root_dir_key, 1); |
| if (ret) { |
| fprintf(stderr, "root dir lookup error\n"); |
| goto fail_no_dir; |
| } |
| |
| leaf = path.nodes[0]; |
| inode_item = btrfs_item_ptr(leaf, path.slots[0], |
| struct btrfs_inode_item); |
| |
| root_dir_inode_size = calculate_dir_inode_size(dir_name); |
| btrfs_set_inode_size(leaf, inode_item, root_dir_inode_size); |
| btrfs_mark_buffer_dirty(leaf); |
| |
| btrfs_release_path(&path); |
| |
| do { |
| parent_dir_entry = list_entry(dir_head->list.next, |
| struct directory_name_entry, |
| list); |
| list_del(&parent_dir_entry->list); |
| |
| parent_inum = parent_dir_entry->inum; |
| parent_dir_name = parent_dir_entry->dir_name; |
| if (chdir(parent_dir_entry->path)) { |
| fprintf(stderr, "chdir error for %s\n", |
| parent_dir_name); |
| ret = -1; |
| goto fail_no_files; |
| } |
| |
| count = scandir(parent_dir_entry->path, &files, |
| directory_select, NULL); |
| if (count == -1) |
| { |
| fprintf(stderr, "scandir for %s failed: %s\n", |
| parent_dir_name, strerror (errno)); |
| ret = -1; |
| goto fail; |
| } |
| |
| for (i = 0; i < count; i++) { |
| cur_file = files[i]; |
| |
| if (lstat(cur_file->d_name, &st) == -1) { |
| fprintf(stderr, "lstat failed for file %s\n", |
| cur_file->d_name); |
| ret = -1; |
| goto fail; |
| } |
| |
| cur_inum = st.st_ino; |
| ret = add_directory_items(trans, root, |
| cur_inum, parent_inum, |
| cur_file->d_name, |
| &st, &dir_index_cnt); |
| if (ret) { |
| fprintf(stderr, "add_directory_items failed\n"); |
| goto fail; |
| } |
| |
| ret = add_inode_items(trans, root, &st, |
| cur_file->d_name, cur_inum, |
| parent_inum, dir_index_cnt, |
| &cur_inode); |
| if (ret == -EEXIST) { |
| BUG_ON(st.st_nlink <= 1); |
| continue; |
| } |
| if (ret) { |
| fprintf(stderr, "add_inode_items failed\n"); |
| goto fail; |
| } |
| |
| ret = add_xattr_item(trans, root, |
| cur_inum, cur_file->d_name); |
| if (ret) { |
| fprintf(stderr, "add_xattr_item failed\n"); |
| if(ret != -ENOTSUP) |
| goto fail; |
| } |
| |
| if (S_ISDIR(st.st_mode)) { |
| dir_entry = malloc(sizeof(struct directory_name_entry)); |
| dir_entry->dir_name = cur_file->d_name; |
| dir_entry->path = make_path(parent_dir_entry->path, |
| cur_file->d_name); |
| dir_entry->inum = cur_inum; |
| list_add_tail(&dir_entry->list, &dir_head->list); |
| } else if (S_ISREG(st.st_mode)) { |
| ret = add_file_items(trans, root, &cur_inode, |
| cur_inum, parent_inum, &st, |
| cur_file->d_name, out_fd); |
| if (ret) { |
| fprintf(stderr, "add_file_items failed\n"); |
| goto fail; |
| } |
| } else if (S_ISLNK(st.st_mode)) { |
| ret = add_symbolic_link(trans, root, |
| cur_inum, cur_file->d_name); |
| if (ret) { |
| fprintf(stderr, "add_symbolic_link failed\n"); |
| goto fail; |
| } |
| } |
| } |
| |
| free_namelist(files, count); |
| free(parent_dir_entry); |
| |
| index_cnt = 2; |
| |
| } while (!list_empty(&dir_head->list)); |
| |
| out: |
| return !!ret; |
| fail: |
| free_namelist(files, count); |
| fail_no_files: |
| free(parent_dir_entry); |
| goto out; |
| fail_no_dir: |
| free(dir_entry); |
| goto out; |
| } |
| |
| static int open_target(char *output_name) |
| { |
| int output_fd; |
| output_fd = open(output_name, O_CREAT | O_RDWR | O_TRUNC, |
| S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH); |
| |
| return output_fd; |
| } |
| |
| static int create_chunks(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, u64 num_of_meta_chunks, |
| u64 size_of_data) |
| { |
| u64 chunk_start; |
| u64 chunk_size; |
| u64 meta_type = BTRFS_BLOCK_GROUP_METADATA; |
| u64 data_type = BTRFS_BLOCK_GROUP_DATA; |
| u64 minimum_data_chunk_size = 8 * 1024 * 1024; |
| u64 i; |
| int ret; |
| |
| for (i = 0; i < num_of_meta_chunks; i++) { |
| ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root, |
| &chunk_start, &chunk_size, meta_type); |
| BUG_ON(ret); |
| ret = btrfs_make_block_group(trans, root->fs_info->extent_root, 0, |
| meta_type, BTRFS_FIRST_CHUNK_TREE_OBJECTID, |
| chunk_start, chunk_size); |
| BUG_ON(ret); |
| set_extent_dirty(&root->fs_info->free_space_cache, |
| chunk_start, chunk_start + chunk_size - 1, 0); |
| } |
| |
| if (size_of_data < minimum_data_chunk_size) |
| size_of_data = minimum_data_chunk_size; |
| |
| ret = btrfs_alloc_data_chunk(trans, root->fs_info->extent_root, |
| &chunk_start, size_of_data, data_type); |
| BUG_ON(ret); |
| ret = btrfs_make_block_group(trans, root->fs_info->extent_root, 0, |
| data_type, BTRFS_FIRST_CHUNK_TREE_OBJECTID, |
| chunk_start, size_of_data); |
| BUG_ON(ret); |
| set_extent_dirty(&root->fs_info->free_space_cache, |
| chunk_start, chunk_start + size_of_data - 1, 0); |
| return ret; |
| } |
| |
| static int make_image(char *source_dir, struct btrfs_root *root, int out_fd) |
| { |
| int ret; |
| struct btrfs_trans_handle *trans; |
| |
| struct stat root_st; |
| |
| struct directory_name_entry dir_head; |
| |
| struct directory_name_entry *dir_entry = NULL; |
| |
| ret = lstat(source_dir, &root_st); |
| if (ret) { |
| fprintf(stderr, "unable to lstat the %s\n", source_dir); |
| goto out; |
| } |
| |
| INIT_LIST_HEAD(&dir_head.list); |
| |
| trans = btrfs_start_transaction(root, 1); |
| ret = traverse_directory(trans, root, source_dir, &dir_head, out_fd); |
| if (ret) { |
| fprintf(stderr, "unable to traverse_directory\n"); |
| goto fail; |
| } |
| btrfs_commit_transaction(trans, root); |
| |
| printf("Making image is completed.\n"); |
| return 0; |
| fail: |
| while (!list_empty(&dir_head.list)) { |
| dir_entry = list_entry(dir_head.list.next, |
| struct directory_name_entry, list); |
| list_del(&dir_entry->list); |
| free(dir_entry); |
| } |
| out: |
| fprintf(stderr, "Making image is aborted.\n"); |
| return -1; |
| } |
| |
| /* |
| * This ignores symlinks with unreadable targets and subdirs that can't |
| * be read. It's a best-effort to give a rough estimate of the size of |
| * a subdir. It doesn't guarantee that prepopulating btrfs from this |
| * tree won't still run out of space. |
| * |
| * The rounding up to 4096 is questionable. Previous code used du -B 4096. |
| */ |
| static u64 global_total_size; |
| static int ftw_add_entry_size(const char *fpath, const struct stat *st, |
| int type) |
| { |
| if (type == FTW_F || type == FTW_D) |
| global_total_size += round_up(st->st_size, 4096); |
| |
| return 0; |
| } |
| |
| static u64 size_sourcedir(char *dir_name, u64 sectorsize, |
| u64 *num_of_meta_chunks_ret, u64 *size_of_data_ret) |
| { |
| u64 dir_size = 0; |
| u64 total_size = 0; |
| int ret; |
| u64 default_chunk_size = 8 * 1024 * 1024; /* 8MB */ |
| u64 allocated_meta_size = 8 * 1024 * 1024; /* 8MB */ |
| u64 allocated_total_size = 20 * 1024 * 1024; /* 20MB */ |
| u64 num_of_meta_chunks = 0; |
| u64 num_of_data_chunks = 0; |
| u64 num_of_allocated_meta_chunks = |
| allocated_meta_size / default_chunk_size; |
| |
| global_total_size = 0; |
| ret = ftw(dir_name, ftw_add_entry_size, 10); |
| dir_size = global_total_size; |
| if (ret < 0) { |
| fprintf(stderr, "ftw subdir walk of '%s' failed: %s\n", |
| dir_name, strerror(errno)); |
| exit(1); |
| } |
| |
| num_of_data_chunks = (dir_size + default_chunk_size - 1) / |
| default_chunk_size; |
| |
| num_of_meta_chunks = (dir_size / 2) / default_chunk_size; |
| if (((dir_size / 2) % default_chunk_size) != 0) |
| num_of_meta_chunks++; |
| if (num_of_meta_chunks <= num_of_allocated_meta_chunks) |
| num_of_meta_chunks = 0; |
| else |
| num_of_meta_chunks -= num_of_allocated_meta_chunks; |
| |
| total_size = allocated_total_size + |
| (num_of_data_chunks * default_chunk_size) + |
| (num_of_meta_chunks * default_chunk_size); |
| |
| *num_of_meta_chunks_ret = num_of_meta_chunks; |
| *size_of_data_ret = num_of_data_chunks * default_chunk_size; |
| return total_size; |
| } |
| |
| static int zero_output_file(int out_fd, u64 size, u32 sectorsize) |
| { |
| int len = sectorsize; |
| int loop_num = size / sectorsize; |
| u64 location = 0; |
| char *buf = malloc(len); |
| int ret = 0, i; |
| ssize_t written; |
| |
| if (!buf) |
| return -ENOMEM; |
| memset(buf, 0, len); |
| for (i = 0; i < loop_num; i++) { |
| written = pwrite64(out_fd, buf, len, location); |
| if (written != len) |
| ret = -EIO; |
| location += sectorsize; |
| } |
| free(buf); |
| return ret; |
| } |
| |
| static int check_leaf_or_node_size(u32 size, u32 sectorsize) |
| { |
| if (size < sectorsize) { |
| fprintf(stderr, |
| "Illegal leafsize (or nodesize) %u (smaller than %u)\n", |
| size, sectorsize); |
| return -1; |
| } else if (size > BTRFS_MAX_METADATA_BLOCKSIZE) { |
| fprintf(stderr, |
| "Illegal leafsize (or nodesize) %u (larger than %u)\n", |
| size, BTRFS_MAX_METADATA_BLOCKSIZE); |
| return -1; |
| } else if (size & (sectorsize - 1)) { |
| fprintf(stderr, |
| "Illegal leafsize (or nodesize) %u (not align to %u)\n", |
| size, sectorsize); |
| return -1; |
| } |
| return 0; |
| } |
| |
| static int is_ssd(const char *file) |
| { |
| blkid_probe probe; |
| char wholedisk[32]; |
| 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, sizeof(char)) < sizeof(char)) { |
| close(fd); |
| return 0; |
| } |
| close(fd); |
| |
| return !atoi((const char *)&rotational); |
| } |
| |
| #define BTRFS_FEATURE_LIST_ALL (1ULL << 63) |
| |
| static const struct btrfs_fs_feature { |
| const char *name; |
| u64 flag; |
| const char *desc; |
| } mkfs_features[] = { |
| { "mixed-bg", BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS, |
| "mixed data and metadata block groups" }, |
| { "extref", BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF, |
| "increased hardlink limit per file to 65536" }, |
| { "raid56", BTRFS_FEATURE_INCOMPAT_RAID56, |
| "raid56 extended format" }, |
| { "skinny-metadata", BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA, |
| "reduced-size metadata extent refs" }, |
| { "no-holes", BTRFS_FEATURE_INCOMPAT_NO_HOLES, |
| "no explicit hole extents for files" }, |
| /* Keep this one last */ |
| { "list-all", BTRFS_FEATURE_LIST_ALL, NULL } |
| }; |
| |
| static void list_all_fs_features(void) |
| { |
| int i; |
| |
| fprintf(stderr, "Filesystem features available at mkfs time:\n"); |
| for (i = 0; i < ARRAY_SIZE(mkfs_features) - 1; i++) { |
| char *is_default = ""; |
| |
| if (mkfs_features[i].flag & DEFAULT_MKFS_FEATURES) |
| is_default = ", default"; |
| fprintf(stderr, "%-20s- %s (0x%llx%s)\n", |
| mkfs_features[i].name, |
| mkfs_features[i].desc, |
| mkfs_features[i].flag, |
| is_default); |
| } |
| } |
| |
| static int parse_one_fs_feature(const char *name, u64 *flags) |
| { |
| int i; |
| int found = 0; |
| |
| for (i = 0; i < ARRAY_SIZE(mkfs_features); i++) { |
| if (name[0] == '^' && |
| !strcmp(mkfs_features[i].name, name + 1)) { |
| *flags &= ~ mkfs_features[i].flag; |
| found = 1; |
| } else if (!strcmp(mkfs_features[i].name, name)) { |
| *flags |= mkfs_features[i].flag; |
| found = 1; |
| } |
| } |
| |
| return !found; |
| } |
| |
| static void process_fs_features(u64 flags) |
| { |
| int i; |
| |
| for (i = 0; i < ARRAY_SIZE(mkfs_features); i++) { |
| if (flags & mkfs_features[i].flag) { |
| printf("Turning ON incompat feature '%s': %s\n", |
| mkfs_features[i].name, |
| mkfs_features[i].desc); |
| } |
| } |
| } |
| |
| |
| /* |
| * Return NULL if all features were parsed fine, otherwise return the name of |
| * the first unparsed. |
| */ |
| static char* parse_fs_features(char *namelist, u64 *flags) |
| { |
| char *this_char; |
| char *save_ptr = NULL; /* Satisfy static checkers */ |
| |
| for (this_char = strtok_r(namelist, ",", &save_ptr); |
| this_char != NULL; |
| this_char = strtok_r(NULL, ",", &save_ptr)) { |
| if (parse_one_fs_feature(this_char, flags)) |
| return this_char; |
| } |
| |
| return NULL; |
| } |
| |
| int main(int ac, char **av) |
| { |
| char *file; |
| struct btrfs_root *root; |
| struct btrfs_trans_handle *trans; |
| char *label = NULL; |
| char *first_file; |
| u64 block_count = 0; |
| u64 dev_block_count = 0; |
| u64 blocks[7]; |
| u64 alloc_start = 0; |
| u64 metadata_profile = 0; |
| u64 data_profile = 0; |
| u32 leafsize = max_t(u32, sysconf(_SC_PAGESIZE), DEFAULT_MKFS_LEAF_SIZE); |
| u32 sectorsize = 4096; |
| u32 nodesize = leafsize; |
| u32 stripesize = 4096; |
| int zero_end = 1; |
| int fd; |
| int ret; |
| int i; |
| int mixed = 0; |
| int leaf_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; |
| int source_dir_set = 0; |
| u64 num_of_meta_chunks = 0; |
| u64 size_of_data = 0; |
| u64 source_dir_size = 0; |
| int dev_cnt = 0; |
| int saved_optind; |
| char estr[100]; |
| char *fs_uuid = NULL; |
| u64 features = DEFAULT_MKFS_FEATURES; |
| |
| while(1) { |
| int c; |
| int option_index = 0; |
| static const struct option long_options[] = { |
| { "alloc-start", 1, NULL, 'A'}, |
| { "byte-count", 1, NULL, 'b' }, |
| { "force", 0, NULL, 'f' }, |
| { "leafsize", 1, NULL, 'l' }, |
| { "label", 1, NULL, 'L'}, |
| { "metadata", 1, NULL, 'm' }, |
| { "mixed", 0, NULL, 'M' }, |
| { "nodesize", 1, NULL, 'n' }, |
| { "sectorsize", 1, NULL, 's' }, |
| { "data", 1, NULL, 'd' }, |
| { "version", 0, NULL, 'V' }, |
| { "rootdir", 1, NULL, 'r' }, |
| { "nodiscard", 0, NULL, 'K' }, |
| { "features", 1, NULL, 'O' }, |
| { "uuid", required_argument, NULL, 'U' }, |
| { NULL, 0, NULL, 0} |
| }; |
| |
| c = getopt_long(ac, av, "A:b:fl:n:s:m:d:L:O:r:U:VMK", |
| long_options, &option_index); |
| 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': |
| case 'n': |
| nodesize = parse_size(optarg); |
| leafsize = parse_size(optarg); |
| leaf_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 = parse_fs_features(tmp, &features); |
| if (tmp) { |
| fprintf(stderr, |
| "Unrecognized filesystem feature '%s'\n", |
| tmp); |
| free(orig); |
| exit(1); |
| } |
| free(orig); |
| if (features & BTRFS_FEATURE_LIST_ALL) { |
| list_all_fs_features(); |
| exit(0); |
| } |
| break; |
| } |
| case 's': |
| sectorsize = parse_size(optarg); |
| break; |
| case 'b': |
| block_count = parse_size(optarg); |
| if (block_count <= BTRFS_MKFS_SMALL_VOLUME_SIZE) { |
| fprintf(stdout, |
| "SMALL VOLUME: forcing mixed metadata/data groups\n"); |
| mixed = 1; |
| } |
| zero_end = 0; |
| break; |
| case 'V': |
| print_version(); |
| break; |
| case 'r': |
| source_dir = optarg; |
| source_dir_set = 1; |
| break; |
| case 'U': |
| fs_uuid = optarg; |
| break; |
| case 'K': |
| discard = 0; |
| break; |
| default: |
| print_usage(); |
| } |
| } |
| sectorsize = max(sectorsize, (u32)sysconf(_SC_PAGESIZE)); |
| if (check_leaf_or_node_size(leafsize, sectorsize)) |
| exit(1); |
| if (check_leaf_or_node_size(nodesize, sectorsize)) |
| exit(1); |
| saved_optind = optind; |
| dev_cnt = ac - optind; |
| if (dev_cnt == 0) |
| print_usage(); |
| |
| if (source_dir_set && dev_cnt > 1) { |
| fprintf(stderr, |
| "The -r option is limited to a single device\n"); |
| exit(1); |
| } |
| |
| if (fs_uuid) { |
| uuid_t dummy_uuid; |
| |
| if (uuid_parse(fs_uuid, dummy_uuid) != 0) { |
| fprintf(stderr, "could not parse UUID: %s\n", fs_uuid); |
| exit(1); |
| } |
| if (!test_uuid_unique(fs_uuid)) { |
| fprintf(stderr, "non-unique UUID: %s\n", fs_uuid); |
| exit(1); |
| } |
| } |
| |
| while (dev_cnt-- > 0) { |
| file = av[optind++]; |
| if (is_block_device(file)) |
| if (test_dev_for_mkfs(file, force_overwrite, estr)) { |
| fprintf(stderr, "Error: %s", estr); |
| exit(1); |
| } |
| } |
| |
| optind = saved_optind; |
| dev_cnt = ac - optind; |
| |
| file = av[optind++]; |
| ssd = is_ssd(file); |
| |
| if (is_vol_small(file)) { |
| printf("SMALL VOLUME: forcing mixed metadata/data groups\n"); |
| mixed = 1; |
| } |
| |
| /* |
| * 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) |
| 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_leafsize = max_t(u32, sysconf(_SC_PAGESIZE), sectorsize); |
| |
| if (metadata_profile_opt || data_profile_opt) { |
| if (metadata_profile != data_profile) { |
| fprintf(stderr, |
| "ERROR: With mixed block groups data and metadata profiles must be the same\n"); |
| exit(1); |
| } |
| } |
| |
| if (!leaf_forced) { |
| leafsize = best_leafsize; |
| nodesize = best_leafsize; |
| if (check_leaf_or_node_size(leafsize, sectorsize)) |
| exit(1); |
| } |
| if (leafsize != sectorsize) { |
| fprintf(stderr, "Error: mixed metadata/data block groups " |
| "require metadata blocksizes equal to the sectorsize\n"); |
| exit(1); |
| } |
| } |
| |
| /* Check device/block_count after the leafsize is determined */ |
| if (block_count && block_count < btrfs_min_dev_size(leafsize)) { |
| fprintf(stderr, |
| "Size '%llu' is too small to make a usable filesystem\n", |
| block_count); |
| fprintf(stderr, |
| "Minimum size for btrfs filesystem is %llu\n", |
| btrfs_min_dev_size(leafsize)); |
| exit(1); |
| } |
| for (i = saved_optind; i < saved_optind + dev_cnt; i++) { |
| char *path; |
| |
| path = av[i]; |
| ret = test_minimum_size(path, leafsize); |
| if (ret < 0) { |
| fprintf(stderr, "Failed to check size for '%s': %s\n", |
| path, strerror(-ret)); |
| exit (1); |
| } |
| if (ret > 0) { |
| fprintf(stderr, |
| "'%s' is too small to make a usable filesystem\n", |
| path); |
| fprintf(stderr, |
| "Minimum size for each btrfs device is %llu.\n", |
| btrfs_min_dev_size(leafsize)); |
| exit(1); |
| } |
| } |
| ret = test_num_disk_vs_raid(metadata_profile, data_profile, |
| dev_cnt, mixed, estr); |
| if (ret) { |
| fprintf(stderr, "Error: %s\n", estr); |
| exit(1); |
| } |
| |
| /* if we are here that means all devs are good to btrfsify */ |
| printf("%s\n", PACKAGE_STRING); |
| printf("See %s for more information.\n\n", PACKAGE_URL); |
| |
| dev_cnt--; |
| |
| if (!source_dir_set) { |
| /* |
| * 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) { |
| fprintf(stderr, "unable to open %s: %s\n", file, |
| strerror(errno)); |
| exit(1); |
| } |
| first_file = file; |
| ret = btrfs_prepare_device(fd, file, zero_end, &dev_block_count, |
| block_count, &mixed, discard); |
| if (ret) { |
| close(fd); |
| exit(1); |
| } |
| if (block_count && block_count > dev_block_count) { |
| fprintf(stderr, "%s is smaller than requested size\n", file); |
| exit(1); |
| } |
| } else { |
| fd = open_target(file); |
| if (fd < 0) { |
| fprintf(stderr, "unable to open the %s\n", file); |
| exit(1); |
| } |
| |
| first_file = file; |
| source_dir_size = size_sourcedir(source_dir, sectorsize, |
| &num_of_meta_chunks, &size_of_data); |
| if(block_count < source_dir_size) |
| block_count = source_dir_size; |
| ret = zero_output_file(fd, block_count, sectorsize); |
| if (ret) { |
| fprintf(stderr, "unable to zero the output file\n"); |
| exit(1); |
| } |
| /* our "device" is the new image file */ |
| dev_block_count = block_count; |
| } |
| |
| /* To create the first block group and chunk 0 in make_btrfs */ |
| if (dev_block_count < BTRFS_MKFS_SYSTEM_GROUP_SIZE) { |
| fprintf(stderr, "device is too small to make filesystem\n"); |
| exit(1); |
| } |
| |
| blocks[0] = BTRFS_SUPER_INFO_OFFSET; |
| for (i = 1; i < 7; i++) { |
| blocks[i] = BTRFS_SUPER_INFO_OFFSET + 1024 * 1024 + |
| leafsize * i; |
| } |
| |
| /* |
| * 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; |
| } |
| |
| process_fs_features(features); |
| |
| ret = make_btrfs(fd, file, label, fs_uuid, blocks, dev_block_count, |
| nodesize, leafsize, |
| sectorsize, stripesize, features); |
| if (ret) { |
| fprintf(stderr, "error during mkfs: %s\n", strerror(-ret)); |
| exit(1); |
| } |
| |
| root = open_ctree(file, 0, OPEN_CTREE_WRITES); |
| if (!root) { |
| fprintf(stderr, "Open ctree failed\n"); |
| close(fd); |
| exit(1); |
| } |
| root->fs_info->alloc_start = alloc_start; |
| |
| ret = make_root_dir(root, mixed); |
| if (ret) { |
| fprintf(stderr, "failed to setup the root directory\n"); |
| exit(1); |
| } |
| |
| trans = btrfs_start_transaction(root, 1); |
| |
| btrfs_register_one_device(file); |
| |
| if (dev_cnt == 0) |
| goto raid_groups; |
| |
| while (dev_cnt-- > 0) { |
| int old_mixed = mixed; |
| |
| file = av[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) { |
| fprintf(stderr, "unable to open %s: %s\n", file, |
| strerror(errno)); |
| exit(1); |
| } |
| ret = btrfs_device_already_in_root(root, fd, |
| BTRFS_SUPER_INFO_OFFSET); |
| if (ret) { |
| fprintf(stderr, "skipping duplicate device %s in FS\n", |
| file); |
| close(fd); |
| continue; |
| } |
| ret = btrfs_prepare_device(fd, file, zero_end, &dev_block_count, |
| block_count, &mixed, discard); |
| if (ret) { |
| close(fd); |
| exit(1); |
| } |
| mixed = old_mixed; |
| |
| ret = btrfs_add_to_fsid(trans, root, fd, file, dev_block_count, |
| sectorsize, sectorsize, sectorsize); |
| BUG_ON(ret); |
| btrfs_register_one_device(file); |
| } |
| |
| raid_groups: |
| if (!source_dir_set) { |
| ret = create_raid_groups(trans, root, data_profile, |
| data_profile_opt, metadata_profile, |
| mixed); |
| BUG_ON(ret); |
| } |
| |
| ret = create_data_reloc_tree(trans, root); |
| BUG_ON(ret); |
| |
| printf("fs created label %s on %s\n\tnodesize %u leafsize %u " |
| "sectorsize %u size %s\n", |
| label, first_file, nodesize, leafsize, sectorsize, |
| pretty_size(btrfs_super_total_bytes(root->fs_info->super_copy))); |
| |
| btrfs_commit_transaction(trans, root); |
| |
| if (source_dir_set) { |
| trans = btrfs_start_transaction(root, 1); |
| ret = create_chunks(trans, root, |
| num_of_meta_chunks, size_of_data); |
| BUG_ON(ret); |
| btrfs_commit_transaction(trans, root); |
| |
| ret = make_image(source_dir, root, fd); |
| BUG_ON(ret); |
| } |
| |
| ret = close_ctree(root); |
| BUG_ON(ret); |
| free(label); |
| return 0; |
| } |