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-rw-r--r--mkfs/main.c1949
1 files changed, 1949 insertions, 0 deletions
diff --git a/mkfs/main.c b/mkfs/main.c
new file mode 100644
index 00000000..e501a939
--- /dev/null
+++ b/mkfs/main.c
@@ -0,0 +1,1949 @@
+/*
+ * 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 <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> included via androidcompat.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"
+#include "list_sort.h"
+
+static u64 index_cnt = 2;
+static int verbose = 1;
+
+struct directory_name_entry {
+ const char *dir_name;
+ const char *path;
+ ino_t inum;
+ struct list_head list;
+};
+
+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_trans_handle *trans;
+ 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);
+ allocation->system += BTRFS_MKFS_SYSTEM_GROUP_SIZE;
+ if (ret)
+ return 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) {
+ error("no space to allocate data/metadata chunk");
+ goto err;
+ }
+ if (ret)
+ return 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);
+ if (ret)
+ return ret;
+ allocation->mixed += chunk_size;
+ } else {
+ ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root,
+ &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, root, 0,
+ BTRFS_BLOCK_GROUP_METADATA,
+ BTRFS_FIRST_CHUNK_TREE_OBJECTID,
+ 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)
+{
+ u64 chunk_start = 0;
+ u64 chunk_size = 0;
+ int ret = 0;
+
+ if (!mixed) {
+ ret = btrfs_alloc_chunk(trans, root->fs_info->extent_root,
+ &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, root, 0,
+ BTRFS_BLOCK_GROUP_DATA,
+ BTRFS_FIRST_CHUNK_TREE_OBJECTID,
+ 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 mkfs_allocation *allocation)
+{
+ 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)
+
+{
+ 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) {
+ error("not enough free space to allocate chunk");
+ exit(1);
+ }
+ if (ret)
+ return ret;
+
+ ret = btrfs_make_block_group(trans, root->fs_info->extent_root, 0,
+ type, BTRFS_FIRST_CHUNK_TREE_OBJECTID,
+ 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_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);
+ 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);
+ 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-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 filesytem\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 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;
+ location.type = 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 (entry->d_name[0] == '.' &&
+ (entry->d_name[1] == 0 ||
+ (entry->d_name[1] == '.' && entry->d_name[2] == 0)))
+ return 0;
+ 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(const 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, const char *name,
+ u64 self_objectid, ino_t parent_inum,
+ int dir_index_cnt, struct btrfs_inode_item *inode_ret)
+{
+ int ret;
+ 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);
+ }
+
+ 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;
+ error("getting a list of xattr failed for %s: %s", file_name,
+ strerror(errno));
+ 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;
+ error("gettig a xattr value failed for %s attr %s: %s",
+ file_name, cur_name, strerror(errno));
+ return ret;
+ }
+
+ ret = btrfs_insert_xattr_item(trans, root, cur_name,
+ cur_name_len, cur_value,
+ ret, objectid);
+ if (ret) {
+ error("inserting a xattr item failed for %s: %s",
+ file_name, strerror(-ret));
+ }
+
+ 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;
+ char buf[PATH_MAX];
+
+ ret = readlink(path_name, buf, sizeof(buf));
+ if (ret <= 0) {
+ error("readlink failed for %s: %s", path_name, strerror(errno));
+ goto fail;
+ }
+ if (ret >= sizeof(buf)) {
+ error("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:
+ 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) {
+ error("cannot open %s: %s", path_name, strerror(errno));
+ 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);
+
+ if (!buffer) {
+ ret = -ENOMEM;
+ goto end;
+ }
+
+ ret_read = pread64(fd, buffer, st->st_size, bytes_read);
+ if (ret_read == -1) {
+ error("cannot read %s at offset %llu length %llu: %s",
+ path_name, (unsigned long long)bytes_read,
+ (unsigned long long)st->st_size,
+ strerror(errno));
+ 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 = calloc(1, sizeof(*eb) + sectorsize);
+ if (!eb) {
+ ret = -ENOMEM;
+ goto end;
+ }
+
+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) {
+ error("cannot read %s at offset %llu length %llu: %s",
+ path_name,
+ (unsigned long long)file_pos + bytes_read,
+ (unsigned long long)sectorsize,
+ strerror(errno));
+ 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) {
+ error("failed to write %s", path_name);
+ 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(const char *dir, const 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, const 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;
+ const 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));
+ if (!dir_entry)
+ return -ENOMEM;
+ dir_entry->dir_name = dir_name;
+ dir_entry->path = realpath(dir_name, real_path);
+ if (!dir_entry->path) {
+ error("realpath failed for %s: %s", dir_name, strerror(errno));
+ 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;
+ root_dir_key.type = BTRFS_INODE_ITEM_KEY;
+ ret = btrfs_lookup_inode(trans, root, &path, &root_dir_key, 1);
+ if (ret) {
+ error("failed to lookup root dir: %d", ret);
+ 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)) {
+ error("chdir failed for %s: %s",
+ parent_dir_name, strerror(errno));
+ ret = -1;
+ goto fail_no_files;
+ }
+
+ count = scandir(parent_dir_entry->path, &files,
+ directory_select, NULL);
+ if (count == -1)
+ {
+ error("scandir failed for %s: %s",
+ 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) {
+ error("lstat failed for %s: %s",
+ cur_file->d_name, strerror(errno));
+ 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) {
+ error("unable to add directory items for %s: %d",
+ cur_file->d_name, ret);
+ 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) {
+ if (st.st_nlink <= 1) {
+ error(
+ "item %s already exists but has wrong st_nlink %lu <= 1",
+ cur_file->d_name,
+ (unsigned long)st.st_nlink);
+ goto fail;
+ }
+ continue;
+ }
+ if (ret) {
+ error("unable to add inode items for %s: %d",
+ cur_file->d_name, ret);
+ goto fail;
+ }
+
+ ret = add_xattr_item(trans, root,
+ cur_inum, cur_file->d_name);
+ if (ret) {
+ error("unable to add xattr items for %s: %d",
+ cur_file->d_name, ret);
+ if(ret != -ENOTSUP)
+ goto fail;
+ }
+
+ if (S_ISDIR(st.st_mode)) {
+ dir_entry = malloc(sizeof(struct directory_name_entry));
+ if (!dir_entry) {
+ ret = -ENOMEM;
+ goto fail;
+ }
+ 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) {
+ error("unable to add file items for %s: %d",
+ cur_file->d_name, ret);
+ goto fail;
+ }
+ } else if (S_ISLNK(st.st_mode)) {
+ ret = add_symbolic_link(trans, root,
+ cur_inum, cur_file->d_name);
+ if (ret) {
+ error("unable to add symlink for %s: %d",
+ cur_file->d_name, ret);
+ 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 create_chunks(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root, u64 num_of_meta_chunks,
+ u64 size_of_data,
+ struct mkfs_allocation *allocation)
+{
+ 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);
+ if (ret)
+ return ret;
+ ret = btrfs_make_block_group(trans, root->fs_info->extent_root, 0,
+ meta_type, BTRFS_FIRST_CHUNK_TREE_OBJECTID,
+ chunk_start, chunk_size);
+ allocation->metadata += chunk_size;
+ if (ret)
+ return 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, 0);
+ if (ret)
+ return 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);
+ allocation->data += size_of_data;
+ if (ret)
+ return 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(const 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) {
+ error("unable to lstat %s: %s", source_dir, strerror(errno));
+ ret = -errno;
+ 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) {
+ error("unable to traverse directory %s: %d", source_dir, ret);
+ goto fail;
+ }
+ ret = btrfs_commit_transaction(trans, root);
+ if (ret) {
+ error("transaction commit failed: %d", ret);
+ goto out;
+ }
+
+ if (verbose)
+ 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:
+ return ret;
+}
+
+/*
+ * 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.
+ */
+static u64 global_total_size;
+static u64 fs_block_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, fs_block_size);
+
+ return 0;
+}
+
+static u64 size_sourcedir(const 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;
+ fs_block_size = sectorsize;
+ ret = ftw(dir_name, ftw_add_entry_size, 10);
+ dir_size = global_total_size;
+ if (ret < 0) {
+ error("ftw subdir walk of %s failed: %s", 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)
+{
+ int loop_num;
+ u64 location = 0;
+ char buf[4096];
+ int ret = 0, i;
+ ssize_t written;
+
+ memset(buf, 0, 4096);
+ loop_num = size / 4096;
+ for (i = 0; i < loop_num; i++) {
+ written = pwrite64(out_fd, buf, 4096, location);
+ if (written != 4096)
+ ret = -EIO;
+ location += 4096;
+ }
+ 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);
+
+ 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;
+
+ 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;
+}
+
+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 blocks[7];
+ 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;
+ int 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;
+ 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 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;
+ 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' },
+ { "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");
+ 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);
+ exit(1);
+ }
+ free(orig);
+ if (features & BTRFS_FEATURE_LIST_ALL) {
+ btrfs_list_all_fs_features(0);
+ exit(0);
+ }
+ 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);
+ exit(0);
+ break;
+ case 'r':
+ source_dir = optarg;
+ source_dir_set = 1;
+ 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_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");
+ exit(1);
+ }
+
+ if (*fs_uuid) {
+ uuid_t dummy_uuid;
+
+ if (uuid_parse(fs_uuid, dummy_uuid) != 0) {
+ error("could not parse UUID: %s", fs_uuid);
+ exit(1);
+ }
+ if (!test_uuid_unique(fs_uuid)) {
+ error("non-unique UUID: %s", fs_uuid);
+ exit(1);
+ }
+ }
+
+ while (dev_cnt-- > 0) {
+ file = argv[optind++];
+ if (is_block_device(file) == 1)
+ if (test_dev_for_mkfs(file, force_overwrite))
+ exit(1);
+ }
+
+ 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");
+ exit(1);
+ }
+ }
+
+ 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))
+ exit(1);
+
+ if (sectorsize < sizeof(struct btrfs_super_block)) {
+ error("sectorsize smaller than superblock: %u < %zu",
+ sectorsize, sizeof(struct btrfs_super_block));
+ exit(1);
+ }
+
+ /* Check device/block_count after the nodesize is determined */
+ if (block_count && block_count < btrfs_min_dev_size(nodesize)) {
+ error("size %llu is too small to make a usable filesystem",
+ block_count);
+ error("minimum size for btrfs filesystem is %llu",
+ btrfs_min_dev_size(nodesize));
+ exit(1);
+ }
+ for (i = saved_optind; i < saved_optind + dev_cnt; i++) {
+ char *path;
+
+ path = argv[i];
+ ret = test_minimum_size(path, nodesize);
+ if (ret < 0) {
+ error("failed to check size for %s: %s",
+ path, strerror(-ret));
+ exit (1);
+ }
+ if (ret > 0) {
+ error("'%s' is too small to make a usable filesystem",
+ path);
+ error("minimum size for each btrfs device is %llu",
+ btrfs_min_dev_size(nodesize));
+ exit(1);
+ }
+ }
+ ret = test_num_disk_vs_raid(metadata_profile, data_profile,
+ dev_cnt, mixed, ssd);
+ if (ret)
+ exit(1);
+
+ 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) {
+ error("unable to open %s: %s", file, strerror(errno));
+ exit(1);
+ }
+ 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) {
+ close(fd);
+ exit(1);
+ }
+ 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);
+ exit(1);
+ }
+ } else {
+ fd = open(file, O_CREAT | O_RDWR,
+ S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH);
+ if (fd < 0) {
+ error("unable to open %s: %s", file, strerror(errno));
+ exit(1);
+ }
+
+ 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);
+ if (ret) {
+ error("unable to zero the output file");
+ 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) {
+ error("device is too small to make filesystem, must be at least %llu",
+ (unsigned long long)BTRFS_MKFS_SYSTEM_GROUP_SIZE);
+ exit(1);
+ }
+
+ blocks[0] = BTRFS_SUPER_INFO_OFFSET;
+ for (i = 1; i < 7; i++) {
+ blocks[i] = BTRFS_SUPER_INFO_OFFSET + 1024 * 1024 +
+ nodesize * i;
+ }
+
+ 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));
+ memcpy(mkfs_cfg.blocks, blocks, sizeof(blocks));
+ 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, NULL);
+ if (ret) {
+ error("error during mkfs: %s", strerror(-ret));
+ exit(1);
+ }
+
+ fs_info = open_ctree_fs_info(file, 0, 0, 0,
+ OPEN_CTREE_WRITES | OPEN_CTREE_FS_PARTIAL);
+ if (!fs_info) {
+ error("open ctree failed");
+ close(fd);
+ exit(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);
+ exit(1);
+ }
+
+ trans = btrfs_start_transaction(root, 1);
+ if (!trans) {
+ error("failed to start transaction");
+ exit(1);
+ }
+
+ ret = create_data_block_groups(trans, root, mixed, &allocation);
+ if (ret) {
+ error("failed to create default data block groups: %d", ret);
+ exit(1);
+ }
+
+ ret = make_root_dir(trans, root, &allocation);
+ if (ret) {
+ error("failed to setup the root directory: %d", ret);
+ exit(1);
+ }
+
+ ret = btrfs_commit_transaction(trans, root);
+ if (ret) {
+ error("unable to commit transaction: %d", ret);
+ goto out;
+ }
+
+ trans = btrfs_start_transaction(root, 1);
+ if (!trans) {
+ error("failed to start transaction");
+ exit(1);
+ }
+
+ 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: %s", file, strerror(errno));
+ exit(1);
+ }
+ 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) {
+ close(fd);
+ exit(1);
+ }
+
+ 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:
+ if (!source_dir_set) {
+ 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_data_reloc_tree(trans, root);
+ if (ret) {
+ error("unable to create data reloc tree: %d", ret);
+ goto out;
+ }
+
+ ret = btrfs_commit_transaction(trans, root);
+ if (ret) {
+ error("unable to commit transaction: %d", ret);
+ goto out;
+ }
+
+ if (source_dir_set) {
+ trans = btrfs_start_transaction(root, 1);
+ ret = create_chunks(trans, root,
+ num_of_meta_chunks, size_of_data,
+ &allocation);
+ if (ret) {
+ error("unable to create chunks: %d", ret);
+ goto out;
+ }
+ ret = btrfs_commit_transaction(trans, root);
+ if (ret) {
+ error("transaction commit failed: %d", ret);
+ goto out;
+ }
+
+ ret = make_image(source_dir, root, fd);
+ if (ret) {
+ error("error wihle filling filesystem: %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 (verbose) {
+ char features_buf[64];
+
+ 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:
+ ret = close_ctree(root);
+
+ if (!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);
+ }
+ }
+
+ btrfs_close_all_devices();
+ free(label);
+
+ return !!ret;
+}