#include <sys/mount.h>
#include <sys/types.h>
#include <sys/stat.h>
+#include <sys/sysinfo.h>
#include <uuid/uuid.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/statfs.h>
#include <linux/magic.h>
#include <getopt.h>
-#include <sys/utsname.h>
+
+#include <btrfsutil.h>
#include "kerncompat.h"
#include "radix-tree.h"
#include "volumes.h"
#include "ioctl.h"
#include "commands.h"
+#include "mkfs/common.h"
#ifndef BLKDISCARD
#define BLKDISCARD _IO(0x12,119)
static int btrfs_scan_done = 0;
-static char argv0_buf[ARGV0_BUF_SIZE] = "btrfs";
-
static int rand_seed_initlized = 0;
static unsigned short rand_seed[3];
-const char *get_argv0_buf(void)
-{
- return argv0_buf;
-}
-
-void fixup_argv0(char **argv, const char *token)
-{
- int len = strlen(argv0_buf);
-
- snprintf(argv0_buf + len, sizeof(argv0_buf) - len, " %s", token);
- argv[0] = argv0_buf;
-}
-
-void set_argv0(char **argv)
-{
- strncpy(argv0_buf, argv[0], sizeof(argv0_buf));
- argv0_buf[sizeof(argv0_buf) - 1] = 0;
-}
-
-int check_argc_exact(int nargs, int expected)
-{
- if (nargs < expected)
- fprintf(stderr, "%s: too few arguments\n", argv0_buf);
- if (nargs > expected)
- fprintf(stderr, "%s: too many arguments\n", argv0_buf);
-
- return nargs != expected;
-}
-
-int check_argc_min(int nargs, int expected)
-{
- if (nargs < expected) {
- fprintf(stderr, "%s: too few arguments\n", argv0_buf);
- return 1;
- }
-
- return 0;
-}
-
-int check_argc_max(int nargs, int expected)
-{
- if (nargs > expected) {
- fprintf(stderr, "%s: too many arguments\n", argv0_buf);
- return 1;
- }
-
- return 0;
-}
-
+struct btrfs_config bconf;
/*
* Discard the given range in one go
{
while (len > 0) {
/* 1G granularity */
- u64 chunk_size = min_t(u64, len, 1*1024*1024*1024);
+ u64 chunk_size = min_t(u64, len, SZ_1G);
int ret;
ret = discard_range(fd, start, chunk_size);
return 0;
}
-static u64 reference_root_table[] = {
- [1] = BTRFS_ROOT_TREE_OBJECTID,
- [2] = BTRFS_EXTENT_TREE_OBJECTID,
- [3] = BTRFS_CHUNK_TREE_OBJECTID,
- [4] = BTRFS_DEV_TREE_OBJECTID,
- [5] = BTRFS_FS_TREE_OBJECTID,
- [6] = BTRFS_CSUM_TREE_OBJECTID,
-};
-
int test_uuid_unique(char *fs_uuid)
{
int unique = 1;
return unique;
}
-/*
- * Reserve space from free_tree.
- * The algorithm is very simple, find the first cache_extent with enough space
- * and allocate from its beginning.
- */
-static int reserve_free_space(struct cache_tree *free_tree, u64 len,
- u64 *ret_start)
-{
- struct cache_extent *cache;
- int found = 0;
-
- ASSERT(ret_start != NULL);
- cache = first_cache_extent(free_tree);
- while (cache) {
- if (cache->size > len) {
- found = 1;
- *ret_start = cache->start;
-
- cache->size -= len;
- if (cache->size == 0) {
- remove_cache_extent(free_tree, cache);
- free(cache);
- } else {
- cache->start += len;
- }
- break;
- }
- cache = next_cache_extent(cache);
- }
- if (!found)
- return -ENOSPC;
- return 0;
-}
-
-static inline int write_temp_super(int fd, struct btrfs_super_block *sb,
- u64 sb_bytenr)
-{
- u32 crc = ~(u32)0;
- int ret;
-
- crc = btrfs_csum_data(NULL, (char *)sb + BTRFS_CSUM_SIZE, crc,
- BTRFS_SUPER_INFO_SIZE - BTRFS_CSUM_SIZE);
- btrfs_csum_final(crc, &sb->csum[0]);
- ret = pwrite(fd, sb, BTRFS_SUPER_INFO_SIZE, sb_bytenr);
- if (ret < BTRFS_SUPER_INFO_SIZE)
- ret = (ret < 0 ? -errno : -EIO);
- else
- ret = 0;
- return ret;
-}
-
-/*
- * Setup temporary superblock at cfg->super_bynter
- * Needed info are extracted from cfg, and root_bytenr, chunk_bytenr
- *
- * For now sys chunk array will be empty and dev_item is empty too.
- * They will be re-initialized at temp chunk tree setup.
- *
- * The superblock signature is not valid, denotes a partially created
- * filesystem, needs to be finalized.
- */
-static int setup_temp_super(int fd, struct btrfs_mkfs_config *cfg,
- u64 root_bytenr, u64 chunk_bytenr)
-{
- unsigned char chunk_uuid[BTRFS_UUID_SIZE];
- char super_buf[BTRFS_SUPER_INFO_SIZE];
- struct btrfs_super_block *super = (struct btrfs_super_block *)super_buf;
- int ret;
-
- memset(super_buf, 0, BTRFS_SUPER_INFO_SIZE);
- cfg->num_bytes = round_down(cfg->num_bytes, cfg->sectorsize);
-
- if (*cfg->fs_uuid) {
- if (uuid_parse(cfg->fs_uuid, super->fsid) != 0) {
- error("cound not parse UUID: %s", cfg->fs_uuid);
- ret = -EINVAL;
- goto out;
- }
- if (!test_uuid_unique(cfg->fs_uuid)) {
- error("non-unique UUID: %s", cfg->fs_uuid);
- ret = -EINVAL;
- goto out;
- }
- } else {
- uuid_generate(super->fsid);
- uuid_unparse(super->fsid, cfg->fs_uuid);
- }
- uuid_generate(chunk_uuid);
- uuid_unparse(chunk_uuid, cfg->chunk_uuid);
-
- btrfs_set_super_bytenr(super, cfg->super_bytenr);
- btrfs_set_super_num_devices(super, 1);
- btrfs_set_super_magic(super, BTRFS_MAGIC_PARTIAL);
- btrfs_set_super_generation(super, 1);
- btrfs_set_super_root(super, root_bytenr);
- btrfs_set_super_chunk_root(super, chunk_bytenr);
- btrfs_set_super_total_bytes(super, cfg->num_bytes);
- /*
- * Temporary filesystem will only have 6 tree roots:
- * chunk tree, root tree, extent_tree, device tree, fs tree
- * and csum tree.
- */
- btrfs_set_super_bytes_used(super, 6 * cfg->nodesize);
- btrfs_set_super_sectorsize(super, cfg->sectorsize);
- btrfs_set_super_leafsize(super, cfg->nodesize);
- btrfs_set_super_nodesize(super, cfg->nodesize);
- btrfs_set_super_stripesize(super, cfg->stripesize);
- btrfs_set_super_csum_type(super, BTRFS_CSUM_TYPE_CRC32);
- btrfs_set_super_chunk_root(super, chunk_bytenr);
- btrfs_set_super_cache_generation(super, -1);
- btrfs_set_super_incompat_flags(super, cfg->features);
- if (cfg->label)
- __strncpy_null(super->label, cfg->label, BTRFS_LABEL_SIZE - 1);
-
- /* Sys chunk array will be re-initialized at chunk tree init time */
- super->sys_chunk_array_size = 0;
-
- ret = write_temp_super(fd, super, cfg->super_bytenr);
-out:
- return ret;
-}
-
-/*
- * Setup an extent buffer for tree block.
- */
-static int setup_temp_extent_buffer(struct extent_buffer *buf,
- struct btrfs_mkfs_config *cfg,
- u64 bytenr, u64 owner)
-{
- unsigned char fsid[BTRFS_FSID_SIZE];
- unsigned char chunk_uuid[BTRFS_UUID_SIZE];
- int ret;
-
- ret = uuid_parse(cfg->fs_uuid, fsid);
- if (ret)
- return -EINVAL;
- ret = uuid_parse(cfg->chunk_uuid, chunk_uuid);
- if (ret)
- return -EINVAL;
-
- memset(buf->data, 0, cfg->nodesize);
- buf->len = cfg->nodesize;
- btrfs_set_header_bytenr(buf, bytenr);
- btrfs_set_header_generation(buf, 1);
- btrfs_set_header_backref_rev(buf, BTRFS_MIXED_BACKREF_REV);
- btrfs_set_header_owner(buf, owner);
- btrfs_set_header_flags(buf, BTRFS_HEADER_FLAG_WRITTEN);
- write_extent_buffer(buf, chunk_uuid, btrfs_header_chunk_tree_uuid(buf),
- BTRFS_UUID_SIZE);
- write_extent_buffer(buf, fsid, btrfs_header_fsid(), BTRFS_FSID_SIZE);
- return 0;
-}
-
-static inline int write_temp_extent_buffer(int fd, struct extent_buffer *buf,
- u64 bytenr)
-{
- int ret;
-
- csum_tree_block_size(buf, BTRFS_CRC32_SIZE, 0);
-
- /* Temporary extent buffer is always mapped 1:1 on disk */
- ret = pwrite(fd, buf->data, buf->len, bytenr);
- if (ret < buf->len)
- ret = (ret < 0 ? ret : -EIO);
- else
- ret = 0;
- return ret;
-}
-
-/*
- * Insert a root item for temporary tree root
- *
- * Only used in make_btrfs_v2().
- */
-static void insert_temp_root_item(struct extent_buffer *buf,
- struct btrfs_mkfs_config *cfg,
- int *slot, u32 *itemoff, u64 objectid,
- u64 bytenr)
-{
- struct btrfs_root_item root_item;
- struct btrfs_inode_item *inode_item;
- struct btrfs_disk_key disk_key;
-
- btrfs_set_header_nritems(buf, *slot + 1);
- (*itemoff) -= sizeof(root_item);
- memset(&root_item, 0, sizeof(root_item));
- inode_item = &root_item.inode;
- btrfs_set_stack_inode_generation(inode_item, 1);
- btrfs_set_stack_inode_size(inode_item, 3);
- btrfs_set_stack_inode_nlink(inode_item, 1);
- btrfs_set_stack_inode_nbytes(inode_item, cfg->nodesize);
- btrfs_set_stack_inode_mode(inode_item, S_IFDIR | 0755);
- btrfs_set_root_refs(&root_item, 1);
- btrfs_set_root_used(&root_item, cfg->nodesize);
- btrfs_set_root_generation(&root_item, 1);
- btrfs_set_root_bytenr(&root_item, bytenr);
-
- memset(&disk_key, 0, sizeof(disk_key));
- btrfs_set_disk_key_type(&disk_key, BTRFS_ROOT_ITEM_KEY);
- btrfs_set_disk_key_objectid(&disk_key, objectid);
- btrfs_set_disk_key_offset(&disk_key, 0);
-
- btrfs_set_item_key(buf, &disk_key, *slot);
- btrfs_set_item_offset(buf, btrfs_item_nr(*slot), *itemoff);
- btrfs_set_item_size(buf, btrfs_item_nr(*slot), sizeof(root_item));
- write_extent_buffer(buf, &root_item,
- btrfs_item_ptr_offset(buf, *slot),
- sizeof(root_item));
- (*slot)++;
-}
-
-static int setup_temp_root_tree(int fd, struct btrfs_mkfs_config *cfg,
- u64 root_bytenr, u64 extent_bytenr,
- u64 dev_bytenr, u64 fs_bytenr, u64 csum_bytenr)
-{
- struct extent_buffer *buf = NULL;
- u32 itemoff = __BTRFS_LEAF_DATA_SIZE(cfg->nodesize);
- int slot = 0;
- int ret;
-
- /*
- * Provided bytenr must in ascending order, or tree root will have a
- * bad key order.
- */
- if (!(root_bytenr < extent_bytenr && extent_bytenr < dev_bytenr &&
- dev_bytenr < fs_bytenr && fs_bytenr < csum_bytenr)) {
- error("bad tree bytenr order: "
- "root < extent %llu < %llu, "
- "extent < dev %llu < %llu, "
- "dev < fs %llu < %llu, "
- "fs < csum %llu < %llu",
- (unsigned long long)root_bytenr,
- (unsigned long long)extent_bytenr,
- (unsigned long long)extent_bytenr,
- (unsigned long long)dev_bytenr,
- (unsigned long long)dev_bytenr,
- (unsigned long long)fs_bytenr,
- (unsigned long long)fs_bytenr,
- (unsigned long long)csum_bytenr);
- return -EINVAL;
- }
- buf = malloc(sizeof(*buf) + cfg->nodesize);
- if (!buf)
- return -ENOMEM;
-
- ret = setup_temp_extent_buffer(buf, cfg, root_bytenr,
- BTRFS_ROOT_TREE_OBJECTID);
- if (ret < 0)
- goto out;
-
- insert_temp_root_item(buf, cfg, &slot, &itemoff,
- BTRFS_EXTENT_TREE_OBJECTID, extent_bytenr);
- insert_temp_root_item(buf, cfg, &slot, &itemoff,
- BTRFS_DEV_TREE_OBJECTID, dev_bytenr);
- insert_temp_root_item(buf, cfg, &slot, &itemoff,
- BTRFS_FS_TREE_OBJECTID, fs_bytenr);
- insert_temp_root_item(buf, cfg, &slot, &itemoff,
- BTRFS_CSUM_TREE_OBJECTID, csum_bytenr);
-
- ret = write_temp_extent_buffer(fd, buf, root_bytenr);
-out:
- free(buf);
- return ret;
-}
-
-static int insert_temp_dev_item(int fd, struct extent_buffer *buf,
- struct btrfs_mkfs_config *cfg,
- int *slot, u32 *itemoff)
-{
- struct btrfs_disk_key disk_key;
- struct btrfs_dev_item *dev_item;
- char super_buf[BTRFS_SUPER_INFO_SIZE];
- unsigned char dev_uuid[BTRFS_UUID_SIZE];
- unsigned char fsid[BTRFS_FSID_SIZE];
- struct btrfs_super_block *super = (struct btrfs_super_block *)super_buf;
- int ret;
-
- ret = pread(fd, super_buf, BTRFS_SUPER_INFO_SIZE, cfg->super_bytenr);
- if (ret < BTRFS_SUPER_INFO_SIZE) {
- ret = (ret < 0 ? -errno : -EIO);
- goto out;
- }
-
- btrfs_set_header_nritems(buf, *slot + 1);
- (*itemoff) -= sizeof(*dev_item);
- /* setup device item 1, 0 is for replace case */
- btrfs_set_disk_key_type(&disk_key, BTRFS_DEV_ITEM_KEY);
- btrfs_set_disk_key_objectid(&disk_key, BTRFS_DEV_ITEMS_OBJECTID);
- btrfs_set_disk_key_offset(&disk_key, 1);
- btrfs_set_item_key(buf, &disk_key, *slot);
- btrfs_set_item_offset(buf, btrfs_item_nr(*slot), *itemoff);
- btrfs_set_item_size(buf, btrfs_item_nr(*slot), sizeof(*dev_item));
-
- dev_item = btrfs_item_ptr(buf, *slot, struct btrfs_dev_item);
- /* Generate device uuid */
- uuid_generate(dev_uuid);
- write_extent_buffer(buf, dev_uuid,
- (unsigned long)btrfs_device_uuid(dev_item),
- BTRFS_UUID_SIZE);
- uuid_parse(cfg->fs_uuid, fsid);
- write_extent_buffer(buf, fsid,
- (unsigned long)btrfs_device_fsid(dev_item),
- BTRFS_FSID_SIZE);
- btrfs_set_device_id(buf, dev_item, 1);
- btrfs_set_device_generation(buf, dev_item, 0);
- btrfs_set_device_total_bytes(buf, dev_item, cfg->num_bytes);
- /*
- * The number must match the initial SYSTEM and META chunk size
- */
- btrfs_set_device_bytes_used(buf, dev_item,
- BTRFS_MKFS_SYSTEM_GROUP_SIZE +
- BTRFS_CONVERT_META_GROUP_SIZE);
- btrfs_set_device_io_align(buf, dev_item, cfg->sectorsize);
- btrfs_set_device_io_width(buf, dev_item, cfg->sectorsize);
- btrfs_set_device_sector_size(buf, dev_item, cfg->sectorsize);
- btrfs_set_device_type(buf, dev_item, 0);
-
- /* Super dev_item is not complete, copy the complete one to sb */
- read_extent_buffer(buf, &super->dev_item, (unsigned long)dev_item,
- sizeof(*dev_item));
- ret = write_temp_super(fd, super, cfg->super_bytenr);
- (*slot)++;
-out:
- return ret;
-}
-
-static int insert_temp_chunk_item(int fd, struct extent_buffer *buf,
- struct btrfs_mkfs_config *cfg,
- int *slot, u32 *itemoff, u64 start, u64 len,
- u64 type)
-{
- struct btrfs_chunk *chunk;
- struct btrfs_disk_key disk_key;
- char super_buf[BTRFS_SUPER_INFO_SIZE];
- struct btrfs_super_block *sb = (struct btrfs_super_block *)super_buf;
- int ret = 0;
-
- ret = pread(fd, super_buf, BTRFS_SUPER_INFO_SIZE,
- cfg->super_bytenr);
- if (ret < BTRFS_SUPER_INFO_SIZE) {
- ret = (ret < 0 ? ret : -EIO);
- return ret;
- }
-
- btrfs_set_header_nritems(buf, *slot + 1);
- (*itemoff) -= btrfs_chunk_item_size(1);
- btrfs_set_disk_key_type(&disk_key, BTRFS_CHUNK_ITEM_KEY);
- btrfs_set_disk_key_objectid(&disk_key, BTRFS_FIRST_CHUNK_TREE_OBJECTID);
- btrfs_set_disk_key_offset(&disk_key, start);
- btrfs_set_item_key(buf, &disk_key, *slot);
- btrfs_set_item_offset(buf, btrfs_item_nr(*slot), *itemoff);
- btrfs_set_item_size(buf, btrfs_item_nr(*slot),
- btrfs_chunk_item_size(1));
-
- chunk = btrfs_item_ptr(buf, *slot, struct btrfs_chunk);
- btrfs_set_chunk_length(buf, chunk, len);
- btrfs_set_chunk_owner(buf, chunk, BTRFS_EXTENT_TREE_OBJECTID);
- btrfs_set_chunk_stripe_len(buf, chunk, 64 * 1024);
- btrfs_set_chunk_type(buf, chunk, type);
- btrfs_set_chunk_io_align(buf, chunk, cfg->sectorsize);
- btrfs_set_chunk_io_width(buf, chunk, cfg->sectorsize);
- btrfs_set_chunk_sector_size(buf, chunk, cfg->sectorsize);
- btrfs_set_chunk_num_stripes(buf, chunk, 1);
- /* TODO: Support DUP profile for system chunk */
- btrfs_set_stripe_devid_nr(buf, chunk, 0, 1);
- /* We are doing 1:1 mapping, so start is its dev offset */
- btrfs_set_stripe_offset_nr(buf, chunk, 0, start);
- write_extent_buffer(buf, &sb->dev_item.uuid,
- (unsigned long)btrfs_stripe_dev_uuid_nr(chunk, 0),
- BTRFS_UUID_SIZE);
- (*slot)++;
-
- /*
- * If it's system chunk, also copy it to super block.
- */
- if (type & BTRFS_BLOCK_GROUP_SYSTEM) {
- char *cur;
-
- cur = (char *)sb->sys_chunk_array + sb->sys_chunk_array_size;
- memcpy(cur, &disk_key, sizeof(disk_key));
- cur += sizeof(disk_key);
- read_extent_buffer(buf, cur, (unsigned long int)chunk,
- btrfs_chunk_item_size(1));
- sb->sys_chunk_array_size += btrfs_chunk_item_size(1) +
- sizeof(disk_key);
-
- ret = write_temp_super(fd, sb, cfg->super_bytenr);
- }
- return ret;
-}
-
-static int setup_temp_chunk_tree(int fd, struct btrfs_mkfs_config *cfg,
- u64 sys_chunk_start, u64 meta_chunk_start,
- u64 chunk_bytenr)
-{
- struct extent_buffer *buf = NULL;
- u32 itemoff = __BTRFS_LEAF_DATA_SIZE(cfg->nodesize);
- int slot = 0;
- int ret;
-
- /* Must ensure SYS chunk starts before META chunk */
- if (meta_chunk_start < sys_chunk_start) {
- error("wrong chunk order: meta < system %llu < %llu",
- (unsigned long long)meta_chunk_start,
- (unsigned long long)sys_chunk_start);
- return -EINVAL;
- }
- buf = malloc(sizeof(*buf) + cfg->nodesize);
- if (!buf)
- return -ENOMEM;
- ret = setup_temp_extent_buffer(buf, cfg, chunk_bytenr,
- BTRFS_CHUNK_TREE_OBJECTID);
- if (ret < 0)
- goto out;
-
- ret = insert_temp_dev_item(fd, buf, cfg, &slot, &itemoff);
- if (ret < 0)
- goto out;
- ret = insert_temp_chunk_item(fd, buf, cfg, &slot, &itemoff,
- sys_chunk_start,
- BTRFS_MKFS_SYSTEM_GROUP_SIZE,
- BTRFS_BLOCK_GROUP_SYSTEM);
- if (ret < 0)
- goto out;
- ret = insert_temp_chunk_item(fd, buf, cfg, &slot, &itemoff,
- meta_chunk_start,
- BTRFS_CONVERT_META_GROUP_SIZE,
- BTRFS_BLOCK_GROUP_METADATA);
- if (ret < 0)
- goto out;
- ret = write_temp_extent_buffer(fd, buf, chunk_bytenr);
-
-out:
- free(buf);
- return ret;
-}
-
-static void insert_temp_dev_extent(struct extent_buffer *buf,
- int *slot, u32 *itemoff, u64 start, u64 len)
-{
- struct btrfs_dev_extent *dev_extent;
- struct btrfs_disk_key disk_key;
-
- btrfs_set_header_nritems(buf, *slot + 1);
- (*itemoff) -= sizeof(*dev_extent);
- btrfs_set_disk_key_type(&disk_key, BTRFS_DEV_EXTENT_KEY);
- btrfs_set_disk_key_objectid(&disk_key, 1);
- btrfs_set_disk_key_offset(&disk_key, start);
- btrfs_set_item_key(buf, &disk_key, *slot);
- btrfs_set_item_offset(buf, btrfs_item_nr(*slot), *itemoff);
- btrfs_set_item_size(buf, btrfs_item_nr(*slot), sizeof(*dev_extent));
-
- dev_extent = btrfs_item_ptr(buf, *slot, struct btrfs_dev_extent);
- btrfs_set_dev_extent_chunk_objectid(buf, dev_extent,
- BTRFS_FIRST_CHUNK_TREE_OBJECTID);
- btrfs_set_dev_extent_length(buf, dev_extent, len);
- btrfs_set_dev_extent_chunk_offset(buf, dev_extent, start);
- btrfs_set_dev_extent_chunk_tree(buf, dev_extent,
- BTRFS_CHUNK_TREE_OBJECTID);
- (*slot)++;
-}
-
-static int setup_temp_dev_tree(int fd, struct btrfs_mkfs_config *cfg,
- u64 sys_chunk_start, u64 meta_chunk_start,
- u64 dev_bytenr)
-{
- struct extent_buffer *buf = NULL;
- u32 itemoff = __BTRFS_LEAF_DATA_SIZE(cfg->nodesize);
- int slot = 0;
- int ret;
-
- /* Must ensure SYS chunk starts before META chunk */
- if (meta_chunk_start < sys_chunk_start) {
- error("wrong chunk order: meta < system %llu < %llu",
- (unsigned long long)meta_chunk_start,
- (unsigned long long)sys_chunk_start);
- return -EINVAL;
- }
- buf = malloc(sizeof(*buf) + cfg->nodesize);
- if (!buf)
- return -ENOMEM;
- ret = setup_temp_extent_buffer(buf, cfg, dev_bytenr,
- BTRFS_DEV_TREE_OBJECTID);
- if (ret < 0)
- goto out;
- insert_temp_dev_extent(buf, &slot, &itemoff, sys_chunk_start,
- BTRFS_MKFS_SYSTEM_GROUP_SIZE);
- insert_temp_dev_extent(buf, &slot, &itemoff, meta_chunk_start,
- BTRFS_CONVERT_META_GROUP_SIZE);
- ret = write_temp_extent_buffer(fd, buf, dev_bytenr);
-out:
- free(buf);
- return ret;
-}
-
-static int setup_temp_fs_tree(int fd, struct btrfs_mkfs_config *cfg,
- u64 fs_bytenr)
-{
- struct extent_buffer *buf = NULL;
- int ret;
-
- buf = malloc(sizeof(*buf) + cfg->nodesize);
- if (!buf)
- return -ENOMEM;
- ret = setup_temp_extent_buffer(buf, cfg, fs_bytenr,
- BTRFS_FS_TREE_OBJECTID);
- if (ret < 0)
- goto out;
- /*
- * Temporary fs tree is completely empty.
- */
- ret = write_temp_extent_buffer(fd, buf, fs_bytenr);
-out:
- free(buf);
- return ret;
-}
-
-static int setup_temp_csum_tree(int fd, struct btrfs_mkfs_config *cfg,
- u64 csum_bytenr)
-{
- struct extent_buffer *buf = NULL;
- int ret;
-
- buf = malloc(sizeof(*buf) + cfg->nodesize);
- if (!buf)
- return -ENOMEM;
- ret = setup_temp_extent_buffer(buf, cfg, csum_bytenr,
- BTRFS_CSUM_TREE_OBJECTID);
- if (ret < 0)
- goto out;
- /*
- * Temporary csum tree is completely empty.
- */
- ret = write_temp_extent_buffer(fd, buf, csum_bytenr);
-out:
- free(buf);
- return ret;
-}
-
-/*
- * Insert one temporary extent item.
- *
- * NOTE: if skinny_metadata is not enabled, this function must be called
- * after all other trees are initialized.
- * Or fs without skinny-metadata will be screwed up.
- */
-static int insert_temp_extent_item(int fd, struct extent_buffer *buf,
- struct btrfs_mkfs_config *cfg,
- int *slot, u32 *itemoff, u64 bytenr,
- u64 ref_root)
-{
- struct extent_buffer *tmp;
- struct btrfs_extent_item *ei;
- struct btrfs_extent_inline_ref *iref;
- struct btrfs_disk_key disk_key;
- struct btrfs_disk_key tree_info_key;
- struct btrfs_tree_block_info *info;
- int itemsize;
- int skinny_metadata = cfg->features &
- BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA;
- int ret;
-
- if (skinny_metadata)
- itemsize = sizeof(*ei) + sizeof(*iref);
- else
- itemsize = sizeof(*ei) + sizeof(*iref) +
- sizeof(struct btrfs_tree_block_info);
-
- btrfs_set_header_nritems(buf, *slot + 1);
- *(itemoff) -= itemsize;
-
- if (skinny_metadata) {
- btrfs_set_disk_key_type(&disk_key, BTRFS_METADATA_ITEM_KEY);
- btrfs_set_disk_key_offset(&disk_key, 0);
- } else {
- btrfs_set_disk_key_type(&disk_key, BTRFS_EXTENT_ITEM_KEY);
- btrfs_set_disk_key_offset(&disk_key, cfg->nodesize);
- }
- btrfs_set_disk_key_objectid(&disk_key, bytenr);
-
- btrfs_set_item_key(buf, &disk_key, *slot);
- btrfs_set_item_offset(buf, btrfs_item_nr(*slot), *itemoff);
- btrfs_set_item_size(buf, btrfs_item_nr(*slot), itemsize);
-
- ei = btrfs_item_ptr(buf, *slot, struct btrfs_extent_item);
- btrfs_set_extent_refs(buf, ei, 1);
- btrfs_set_extent_generation(buf, ei, 1);
- btrfs_set_extent_flags(buf, ei, BTRFS_EXTENT_FLAG_TREE_BLOCK);
-
- if (skinny_metadata) {
- iref = (struct btrfs_extent_inline_ref *)(ei + 1);
- } else {
- info = (struct btrfs_tree_block_info *)(ei + 1);
- iref = (struct btrfs_extent_inline_ref *)(info + 1);
- }
- btrfs_set_extent_inline_ref_type(buf, iref,
- BTRFS_TREE_BLOCK_REF_KEY);
- btrfs_set_extent_inline_ref_offset(buf, iref, ref_root);
-
- (*slot)++;
- if (skinny_metadata)
- return 0;
-
- /*
- * Lastly, check the tree block key by read the tree block
- * Since we do 1:1 mapping for convert case, we can directly
- * read the bytenr from disk
- */
- tmp = malloc(sizeof(*tmp) + cfg->nodesize);
- if (!tmp)
- return -ENOMEM;
- ret = setup_temp_extent_buffer(tmp, cfg, bytenr, ref_root);
- if (ret < 0)
- goto out;
- ret = pread(fd, tmp->data, cfg->nodesize, bytenr);
- if (ret < cfg->nodesize) {
- ret = (ret < 0 ? -errno : -EIO);
- goto out;
- }
- if (btrfs_header_nritems(tmp) == 0) {
- btrfs_set_disk_key_type(&tree_info_key, 0);
- btrfs_set_disk_key_objectid(&tree_info_key, 0);
- btrfs_set_disk_key_offset(&tree_info_key, 0);
- } else {
- btrfs_item_key(tmp, &tree_info_key, 0);
- }
- btrfs_set_tree_block_key(buf, info, &tree_info_key);
-
-out:
- free(tmp);
- return ret;
-}
-
-static void insert_temp_block_group(struct extent_buffer *buf,
- struct btrfs_mkfs_config *cfg,
- int *slot, u32 *itemoff,
- u64 bytenr, u64 len, u64 used, u64 flag)
-{
- struct btrfs_block_group_item bgi;
- struct btrfs_disk_key disk_key;
-
- btrfs_set_header_nritems(buf, *slot + 1);
- (*itemoff) -= sizeof(bgi);
- btrfs_set_disk_key_type(&disk_key, BTRFS_BLOCK_GROUP_ITEM_KEY);
- btrfs_set_disk_key_objectid(&disk_key, bytenr);
- btrfs_set_disk_key_offset(&disk_key, len);
- btrfs_set_item_key(buf, &disk_key, *slot);
- btrfs_set_item_offset(buf, btrfs_item_nr(*slot), *itemoff);
- btrfs_set_item_size(buf, btrfs_item_nr(*slot), sizeof(bgi));
-
- btrfs_set_block_group_flags(&bgi, flag);
- btrfs_set_block_group_used(&bgi, used);
- btrfs_set_block_group_chunk_objectid(&bgi,
- BTRFS_FIRST_CHUNK_TREE_OBJECTID);
- write_extent_buffer(buf, &bgi, btrfs_item_ptr_offset(buf, *slot),
- sizeof(bgi));
- (*slot)++;
-}
-
-static int setup_temp_extent_tree(int fd, struct btrfs_mkfs_config *cfg,
- u64 chunk_bytenr, u64 root_bytenr,
- u64 extent_bytenr, u64 dev_bytenr,
- u64 fs_bytenr, u64 csum_bytenr)
-{
- struct extent_buffer *buf = NULL;
- u32 itemoff = __BTRFS_LEAF_DATA_SIZE(cfg->nodesize);
- int slot = 0;
- int ret;
-
- /*
- * We must ensure provided bytenr are in ascending order,
- * or extent tree key order will be broken.
- */
- if (!(chunk_bytenr < root_bytenr && root_bytenr < extent_bytenr &&
- extent_bytenr < dev_bytenr && dev_bytenr < fs_bytenr &&
- fs_bytenr < csum_bytenr)) {
- error("bad tree bytenr order: "
- "chunk < root %llu < %llu, "
- "root < extent %llu < %llu, "
- "extent < dev %llu < %llu, "
- "dev < fs %llu < %llu, "
- "fs < csum %llu < %llu",
- (unsigned long long)chunk_bytenr,
- (unsigned long long)root_bytenr,
- (unsigned long long)root_bytenr,
- (unsigned long long)extent_bytenr,
- (unsigned long long)extent_bytenr,
- (unsigned long long)dev_bytenr,
- (unsigned long long)dev_bytenr,
- (unsigned long long)fs_bytenr,
- (unsigned long long)fs_bytenr,
- (unsigned long long)csum_bytenr);
- return -EINVAL;
- }
- buf = malloc(sizeof(*buf) + cfg->nodesize);
- if (!buf)
- return -ENOMEM;
-
- ret = setup_temp_extent_buffer(buf, cfg, extent_bytenr,
- BTRFS_EXTENT_TREE_OBJECTID);
- if (ret < 0)
- goto out;
-
- ret = insert_temp_extent_item(fd, buf, cfg, &slot, &itemoff,
- chunk_bytenr, BTRFS_CHUNK_TREE_OBJECTID);
- if (ret < 0)
- goto out;
-
- insert_temp_block_group(buf, cfg, &slot, &itemoff, chunk_bytenr,
- BTRFS_MKFS_SYSTEM_GROUP_SIZE, cfg->nodesize,
- BTRFS_BLOCK_GROUP_SYSTEM);
-
- ret = insert_temp_extent_item(fd, buf, cfg, &slot, &itemoff,
- root_bytenr, BTRFS_ROOT_TREE_OBJECTID);
- if (ret < 0)
- goto out;
-
- /* 5 tree block used, root, extent, dev, fs and csum*/
- insert_temp_block_group(buf, cfg, &slot, &itemoff, root_bytenr,
- BTRFS_CONVERT_META_GROUP_SIZE, cfg->nodesize * 5,
- BTRFS_BLOCK_GROUP_METADATA);
-
- ret = insert_temp_extent_item(fd, buf, cfg, &slot, &itemoff,
- extent_bytenr, BTRFS_EXTENT_TREE_OBJECTID);
- if (ret < 0)
- goto out;
- ret = insert_temp_extent_item(fd, buf, cfg, &slot, &itemoff,
- dev_bytenr, BTRFS_DEV_TREE_OBJECTID);
- if (ret < 0)
- goto out;
- ret = insert_temp_extent_item(fd, buf, cfg, &slot, &itemoff,
- fs_bytenr, BTRFS_FS_TREE_OBJECTID);
- if (ret < 0)
- goto out;
- ret = insert_temp_extent_item(fd, buf, cfg, &slot, &itemoff,
- csum_bytenr, BTRFS_CSUM_TREE_OBJECTID);
- if (ret < 0)
- goto out;
-
- ret = write_temp_extent_buffer(fd, buf, extent_bytenr);
-out:
- free(buf);
- return ret;
-}
-
-/*
- * Improved version of make_btrfs().
- *
- * This one will
- * 1) Do chunk allocation to avoid used data
- * And after this function, extent type matches chunk type
- * 2) Better structured code
- * No super long hand written codes to initialized all tree blocks
- * Split into small blocks and reuse codes.
- * TODO: Reuse tree operation facilities by introducing new flags
- */
-static int make_convert_btrfs(int fd, struct btrfs_mkfs_config *cfg,
- struct btrfs_convert_context *cctx)
-{
- struct cache_tree *free = &cctx->free;
- struct cache_tree *used = &cctx->used;
- u64 sys_chunk_start;
- u64 meta_chunk_start;
- /* chunk tree bytenr, in system chunk */
- u64 chunk_bytenr;
- /* metadata trees bytenr, in metadata chunk */
- u64 root_bytenr;
- u64 extent_bytenr;
- u64 dev_bytenr;
- u64 fs_bytenr;
- u64 csum_bytenr;
- int ret;
-
- /* Shouldn't happen */
- BUG_ON(cache_tree_empty(used));
-
- /*
- * reserve space for temporary superblock first
- * Here we allocate a little larger space, to keep later
- * free space will be STRIPE_LEN aligned
- */
- ret = reserve_free_space(free, BTRFS_STRIPE_LEN,
- &cfg->super_bytenr);
- if (ret < 0)
- goto out;
-
- /*
- * Then reserve system chunk space
- * TODO: Change system group size depending on cctx->total_bytes.
- * If using current 4M, it can only handle less than one TB for
- * worst case and then run out of sys space.
- */
- ret = reserve_free_space(free, BTRFS_MKFS_SYSTEM_GROUP_SIZE,
- &sys_chunk_start);
- if (ret < 0)
- goto out;
- ret = reserve_free_space(free, BTRFS_CONVERT_META_GROUP_SIZE,
- &meta_chunk_start);
- if (ret < 0)
- goto out;
-
- /*
- * Allocated meta/sys chunks will be mapped 1:1 with device offset.
- *
- * Inside the allocated metadata chunk, the layout will be:
- * | offset | contents |
- * -------------------------------------
- * | +0 | tree root |
- * | +nodesize | extent root |
- * | +nodesize * 2 | device root |
- * | +nodesize * 3 | fs tree |
- * | +nodesize * 4 | csum tree |
- * -------------------------------------
- * Inside the allocated system chunk, the layout will be:
- * | offset | contents |
- * -------------------------------------
- * | +0 | chunk root |
- * -------------------------------------
- */
- chunk_bytenr = sys_chunk_start;
- root_bytenr = meta_chunk_start;
- extent_bytenr = meta_chunk_start + cfg->nodesize;
- dev_bytenr = meta_chunk_start + cfg->nodesize * 2;
- fs_bytenr = meta_chunk_start + cfg->nodesize * 3;
- csum_bytenr = meta_chunk_start + cfg->nodesize * 4;
-
- ret = setup_temp_super(fd, cfg, root_bytenr, chunk_bytenr);
- if (ret < 0)
- goto out;
-
- ret = setup_temp_root_tree(fd, cfg, root_bytenr, extent_bytenr,
- dev_bytenr, fs_bytenr, csum_bytenr);
- if (ret < 0)
- goto out;
- ret = setup_temp_chunk_tree(fd, cfg, sys_chunk_start, meta_chunk_start,
- chunk_bytenr);
- if (ret < 0)
- goto out;
- ret = setup_temp_dev_tree(fd, cfg, sys_chunk_start, meta_chunk_start,
- dev_bytenr);
- if (ret < 0)
- goto out;
- ret = setup_temp_fs_tree(fd, cfg, fs_bytenr);
- if (ret < 0)
- goto out;
- ret = setup_temp_csum_tree(fd, cfg, csum_bytenr);
- if (ret < 0)
- goto out;
- /*
- * Setup extent tree last, since it may need to read tree block key
- * for non-skinny metadata case.
- */
- ret = setup_temp_extent_tree(fd, cfg, chunk_bytenr, root_bytenr,
- extent_bytenr, dev_bytenr, fs_bytenr,
- csum_bytenr);
-out:
- return ret;
-}
-
-/*
- * @fs_uuid - if NULL, generates a UUID, returns back the new filesystem UUID
- *
- * The superblock signature is not valid, denotes a partially created
- * filesystem, needs to be finalized.
- */
-int make_btrfs(int fd, struct btrfs_mkfs_config *cfg,
- struct btrfs_convert_context *cctx)
-{
- struct btrfs_super_block super;
- struct extent_buffer *buf;
- struct btrfs_root_item root_item;
- struct btrfs_disk_key disk_key;
- struct btrfs_extent_item *extent_item;
- struct btrfs_inode_item *inode_item;
- struct btrfs_chunk *chunk;
- struct btrfs_dev_item *dev_item;
- struct btrfs_dev_extent *dev_extent;
- u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
- u8 *ptr;
- int i;
- int ret;
- u32 itemoff;
- u32 nritems = 0;
- u64 first_free;
- u64 ref_root;
- u32 array_size;
- u32 item_size;
- int skinny_metadata = !!(cfg->features &
- BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA);
- u64 num_bytes;
-
- if (cctx)
- return make_convert_btrfs(fd, cfg, cctx);
- buf = malloc(sizeof(*buf) + max(cfg->sectorsize, cfg->nodesize));
- if (!buf)
- return -ENOMEM;
-
- first_free = BTRFS_SUPER_INFO_OFFSET + cfg->sectorsize * 2 - 1;
- first_free &= ~((u64)cfg->sectorsize - 1);
-
- memset(&super, 0, sizeof(super));
-
- num_bytes = (cfg->num_bytes / cfg->sectorsize) * cfg->sectorsize;
- if (*cfg->fs_uuid) {
- if (uuid_parse(cfg->fs_uuid, super.fsid) != 0) {
- error("cannot not parse UUID: %s", cfg->fs_uuid);
- ret = -EINVAL;
- goto out;
- }
- if (!test_uuid_unique(cfg->fs_uuid)) {
- error("non-unique UUID: %s", cfg->fs_uuid);
- ret = -EBUSY;
- goto out;
- }
- } else {
- uuid_generate(super.fsid);
- uuid_unparse(super.fsid, cfg->fs_uuid);
- }
- uuid_generate(super.dev_item.uuid);
- uuid_generate(chunk_tree_uuid);
-
- btrfs_set_super_bytenr(&super, cfg->blocks[0]);
- btrfs_set_super_num_devices(&super, 1);
- btrfs_set_super_magic(&super, BTRFS_MAGIC_PARTIAL);
- btrfs_set_super_generation(&super, 1);
- btrfs_set_super_root(&super, cfg->blocks[1]);
- btrfs_set_super_chunk_root(&super, cfg->blocks[3]);
- btrfs_set_super_total_bytes(&super, num_bytes);
- btrfs_set_super_bytes_used(&super, 6 * cfg->nodesize);
- btrfs_set_super_sectorsize(&super, cfg->sectorsize);
- btrfs_set_super_leafsize(&super, cfg->nodesize);
- btrfs_set_super_nodesize(&super, cfg->nodesize);
- btrfs_set_super_stripesize(&super, cfg->stripesize);
- btrfs_set_super_csum_type(&super, BTRFS_CSUM_TYPE_CRC32);
- btrfs_set_super_chunk_root_generation(&super, 1);
- btrfs_set_super_cache_generation(&super, -1);
- btrfs_set_super_incompat_flags(&super, cfg->features);
- if (cfg->label)
- __strncpy_null(super.label, cfg->label, BTRFS_LABEL_SIZE - 1);
-
- /* create the tree of root objects */
- memset(buf->data, 0, cfg->nodesize);
- buf->len = cfg->nodesize;
- btrfs_set_header_bytenr(buf, cfg->blocks[1]);
- btrfs_set_header_nritems(buf, 4);
- btrfs_set_header_generation(buf, 1);
- btrfs_set_header_backref_rev(buf, BTRFS_MIXED_BACKREF_REV);
- btrfs_set_header_owner(buf, BTRFS_ROOT_TREE_OBJECTID);
- write_extent_buffer(buf, super.fsid, btrfs_header_fsid(),
- BTRFS_FSID_SIZE);
-
- write_extent_buffer(buf, chunk_tree_uuid,
- btrfs_header_chunk_tree_uuid(buf),
- BTRFS_UUID_SIZE);
-
- /* create the items for the root tree */
- memset(&root_item, 0, sizeof(root_item));
- inode_item = &root_item.inode;
- btrfs_set_stack_inode_generation(inode_item, 1);
- btrfs_set_stack_inode_size(inode_item, 3);
- btrfs_set_stack_inode_nlink(inode_item, 1);
- btrfs_set_stack_inode_nbytes(inode_item, cfg->nodesize);
- btrfs_set_stack_inode_mode(inode_item, S_IFDIR | 0755);
- btrfs_set_root_refs(&root_item, 1);
- btrfs_set_root_used(&root_item, cfg->nodesize);
- btrfs_set_root_generation(&root_item, 1);
-
- memset(&disk_key, 0, sizeof(disk_key));
- btrfs_set_disk_key_type(&disk_key, BTRFS_ROOT_ITEM_KEY);
- btrfs_set_disk_key_offset(&disk_key, 0);
- nritems = 0;
-
- itemoff = __BTRFS_LEAF_DATA_SIZE(cfg->nodesize) - sizeof(root_item);
- btrfs_set_root_bytenr(&root_item, cfg->blocks[2]);
- btrfs_set_disk_key_objectid(&disk_key, BTRFS_EXTENT_TREE_OBJECTID);
- btrfs_set_item_key(buf, &disk_key, nritems);
- btrfs_set_item_offset(buf, btrfs_item_nr(nritems), itemoff);
- btrfs_set_item_size(buf, btrfs_item_nr(nritems),
- sizeof(root_item));
- write_extent_buffer(buf, &root_item, btrfs_item_ptr_offset(buf,
- nritems), sizeof(root_item));
- nritems++;
-
- itemoff = itemoff - sizeof(root_item);
- btrfs_set_root_bytenr(&root_item, cfg->blocks[4]);
- btrfs_set_disk_key_objectid(&disk_key, BTRFS_DEV_TREE_OBJECTID);
- btrfs_set_item_key(buf, &disk_key, nritems);
- btrfs_set_item_offset(buf, btrfs_item_nr(nritems), itemoff);
- btrfs_set_item_size(buf, btrfs_item_nr(nritems),
- sizeof(root_item));
- write_extent_buffer(buf, &root_item,
- btrfs_item_ptr_offset(buf, nritems),
- sizeof(root_item));
- nritems++;
-
- itemoff = itemoff - sizeof(root_item);
- btrfs_set_root_bytenr(&root_item, cfg->blocks[5]);
- btrfs_set_disk_key_objectid(&disk_key, BTRFS_FS_TREE_OBJECTID);
- btrfs_set_item_key(buf, &disk_key, nritems);
- btrfs_set_item_offset(buf, btrfs_item_nr(nritems), itemoff);
- btrfs_set_item_size(buf, btrfs_item_nr(nritems),
- sizeof(root_item));
- write_extent_buffer(buf, &root_item,
- btrfs_item_ptr_offset(buf, nritems),
- sizeof(root_item));
- nritems++;
-
- itemoff = itemoff - sizeof(root_item);
- btrfs_set_root_bytenr(&root_item, cfg->blocks[6]);
- btrfs_set_disk_key_objectid(&disk_key, BTRFS_CSUM_TREE_OBJECTID);
- btrfs_set_item_key(buf, &disk_key, nritems);
- btrfs_set_item_offset(buf, btrfs_item_nr(nritems), itemoff);
- btrfs_set_item_size(buf, btrfs_item_nr(nritems),
- sizeof(root_item));
- write_extent_buffer(buf, &root_item,
- btrfs_item_ptr_offset(buf, nritems),
- sizeof(root_item));
- nritems++;
-
-
- csum_tree_block_size(buf, BTRFS_CRC32_SIZE, 0);
- ret = pwrite(fd, buf->data, cfg->nodesize, cfg->blocks[1]);
- if (ret != cfg->nodesize) {
- ret = (ret < 0 ? -errno : -EIO);
- goto out;
- }
-
- /* create the items for the extent tree */
- memset(buf->data + sizeof(struct btrfs_header), 0,
- cfg->nodesize - sizeof(struct btrfs_header));
- nritems = 0;
- itemoff = __BTRFS_LEAF_DATA_SIZE(cfg->nodesize);
- for (i = 1; i < 7; i++) {
- item_size = sizeof(struct btrfs_extent_item);
- if (!skinny_metadata)
- item_size += sizeof(struct btrfs_tree_block_info);
-
- if (cfg->blocks[i] < first_free) {
- error("block[%d] below first free: %llu < %llu",
- i, (unsigned long long)cfg->blocks[i],
- (unsigned long long)first_free);
- ret = -EINVAL;
- goto out;
- }
- if (cfg->blocks[i] < cfg->blocks[i - 1]) {
- error("blocks %d and %d in reverse order: %llu < %llu",
- i, i - 1,
- (unsigned long long)cfg->blocks[i],
- (unsigned long long)cfg->blocks[i - 1]);
- ret = -EINVAL;
- goto out;
- }
-
- /* create extent item */
- itemoff -= item_size;
- btrfs_set_disk_key_objectid(&disk_key, cfg->blocks[i]);
- if (skinny_metadata) {
- btrfs_set_disk_key_type(&disk_key,
- BTRFS_METADATA_ITEM_KEY);
- btrfs_set_disk_key_offset(&disk_key, 0);
- } else {
- btrfs_set_disk_key_type(&disk_key,
- BTRFS_EXTENT_ITEM_KEY);
- btrfs_set_disk_key_offset(&disk_key, cfg->nodesize);
- }
- btrfs_set_item_key(buf, &disk_key, nritems);
- btrfs_set_item_offset(buf, btrfs_item_nr(nritems),
- itemoff);
- btrfs_set_item_size(buf, btrfs_item_nr(nritems),
- item_size);
- extent_item = btrfs_item_ptr(buf, nritems,
- struct btrfs_extent_item);
- btrfs_set_extent_refs(buf, extent_item, 1);
- btrfs_set_extent_generation(buf, extent_item, 1);
- btrfs_set_extent_flags(buf, extent_item,
- BTRFS_EXTENT_FLAG_TREE_BLOCK);
- nritems++;
-
- /* create extent ref */
- ref_root = reference_root_table[i];
- btrfs_set_disk_key_objectid(&disk_key, cfg->blocks[i]);
- btrfs_set_disk_key_offset(&disk_key, ref_root);
- btrfs_set_disk_key_type(&disk_key, BTRFS_TREE_BLOCK_REF_KEY);
- btrfs_set_item_key(buf, &disk_key, nritems);
- btrfs_set_item_offset(buf, btrfs_item_nr(nritems),
- itemoff);
- btrfs_set_item_size(buf, btrfs_item_nr(nritems), 0);
- nritems++;
- }
- btrfs_set_header_bytenr(buf, cfg->blocks[2]);
- btrfs_set_header_owner(buf, BTRFS_EXTENT_TREE_OBJECTID);
- btrfs_set_header_nritems(buf, nritems);
- csum_tree_block_size(buf, BTRFS_CRC32_SIZE, 0);
- ret = pwrite(fd, buf->data, cfg->nodesize, cfg->blocks[2]);
- if (ret != cfg->nodesize) {
- ret = (ret < 0 ? -errno : -EIO);
- goto out;
- }
-
- /* create the chunk tree */
- memset(buf->data + sizeof(struct btrfs_header), 0,
- cfg->nodesize - sizeof(struct btrfs_header));
- nritems = 0;
- item_size = sizeof(*dev_item);
- itemoff = __BTRFS_LEAF_DATA_SIZE(cfg->nodesize) - item_size;
-
- /* first device 1 (there is no device 0) */
- btrfs_set_disk_key_objectid(&disk_key, BTRFS_DEV_ITEMS_OBJECTID);
- btrfs_set_disk_key_offset(&disk_key, 1);
- btrfs_set_disk_key_type(&disk_key, BTRFS_DEV_ITEM_KEY);
- btrfs_set_item_key(buf, &disk_key, nritems);
- btrfs_set_item_offset(buf, btrfs_item_nr(nritems), itemoff);
- btrfs_set_item_size(buf, btrfs_item_nr(nritems), item_size);
-
- dev_item = btrfs_item_ptr(buf, nritems, struct btrfs_dev_item);
- btrfs_set_device_id(buf, dev_item, 1);
- btrfs_set_device_generation(buf, dev_item, 0);
- btrfs_set_device_total_bytes(buf, dev_item, num_bytes);
- btrfs_set_device_bytes_used(buf, dev_item,
- BTRFS_MKFS_SYSTEM_GROUP_SIZE);
- btrfs_set_device_io_align(buf, dev_item, cfg->sectorsize);
- btrfs_set_device_io_width(buf, dev_item, cfg->sectorsize);
- btrfs_set_device_sector_size(buf, dev_item, cfg->sectorsize);
- btrfs_set_device_type(buf, dev_item, 0);
-
- write_extent_buffer(buf, super.dev_item.uuid,
- (unsigned long)btrfs_device_uuid(dev_item),
- BTRFS_UUID_SIZE);
- write_extent_buffer(buf, super.fsid,
- (unsigned long)btrfs_device_fsid(dev_item),
- BTRFS_UUID_SIZE);
- read_extent_buffer(buf, &super.dev_item, (unsigned long)dev_item,
- sizeof(*dev_item));
-
- nritems++;
- item_size = btrfs_chunk_item_size(1);
- itemoff = itemoff - item_size;
-
- /* then we have chunk 0 */
- btrfs_set_disk_key_objectid(&disk_key, BTRFS_FIRST_CHUNK_TREE_OBJECTID);
- btrfs_set_disk_key_offset(&disk_key, 0);
- btrfs_set_disk_key_type(&disk_key, BTRFS_CHUNK_ITEM_KEY);
- btrfs_set_item_key(buf, &disk_key, nritems);
- btrfs_set_item_offset(buf, btrfs_item_nr(nritems), itemoff);
- btrfs_set_item_size(buf, btrfs_item_nr(nritems), item_size);
-
- chunk = btrfs_item_ptr(buf, nritems, struct btrfs_chunk);
- btrfs_set_chunk_length(buf, chunk, BTRFS_MKFS_SYSTEM_GROUP_SIZE);
- btrfs_set_chunk_owner(buf, chunk, BTRFS_EXTENT_TREE_OBJECTID);
- btrfs_set_chunk_stripe_len(buf, chunk, 64 * 1024);
- btrfs_set_chunk_type(buf, chunk, BTRFS_BLOCK_GROUP_SYSTEM);
- btrfs_set_chunk_io_align(buf, chunk, cfg->sectorsize);
- btrfs_set_chunk_io_width(buf, chunk, cfg->sectorsize);
- btrfs_set_chunk_sector_size(buf, chunk, cfg->sectorsize);
- btrfs_set_chunk_num_stripes(buf, chunk, 1);
- btrfs_set_stripe_devid_nr(buf, chunk, 0, 1);
- btrfs_set_stripe_offset_nr(buf, chunk, 0, 0);
- nritems++;
-
- write_extent_buffer(buf, super.dev_item.uuid,
- (unsigned long)btrfs_stripe_dev_uuid(&chunk->stripe),
- BTRFS_UUID_SIZE);
-
- /* copy the key for the chunk to the system array */
- ptr = super.sys_chunk_array;
- array_size = sizeof(disk_key);
-
- memcpy(ptr, &disk_key, sizeof(disk_key));
- ptr += sizeof(disk_key);
-
- /* copy the chunk to the system array */
- read_extent_buffer(buf, ptr, (unsigned long)chunk, item_size);
- array_size += item_size;
- ptr += item_size;
- btrfs_set_super_sys_array_size(&super, array_size);
-
- btrfs_set_header_bytenr(buf, cfg->blocks[3]);
- btrfs_set_header_owner(buf, BTRFS_CHUNK_TREE_OBJECTID);
- btrfs_set_header_nritems(buf, nritems);
- csum_tree_block_size(buf, BTRFS_CRC32_SIZE, 0);
- ret = pwrite(fd, buf->data, cfg->nodesize, cfg->blocks[3]);
- if (ret != cfg->nodesize) {
- ret = (ret < 0 ? -errno : -EIO);
- goto out;
- }
-
- /* create the device tree */
- memset(buf->data + sizeof(struct btrfs_header), 0,
- cfg->nodesize - sizeof(struct btrfs_header));
- nritems = 0;
- itemoff = __BTRFS_LEAF_DATA_SIZE(cfg->nodesize) -
- sizeof(struct btrfs_dev_extent);
-
- btrfs_set_disk_key_objectid(&disk_key, 1);
- btrfs_set_disk_key_offset(&disk_key, 0);
- btrfs_set_disk_key_type(&disk_key, BTRFS_DEV_EXTENT_KEY);
- btrfs_set_item_key(buf, &disk_key, nritems);
- btrfs_set_item_offset(buf, btrfs_item_nr(nritems), itemoff);
- btrfs_set_item_size(buf, btrfs_item_nr(nritems),
- sizeof(struct btrfs_dev_extent));
- dev_extent = btrfs_item_ptr(buf, nritems, struct btrfs_dev_extent);
- btrfs_set_dev_extent_chunk_tree(buf, dev_extent,
- BTRFS_CHUNK_TREE_OBJECTID);
- btrfs_set_dev_extent_chunk_objectid(buf, dev_extent,
- BTRFS_FIRST_CHUNK_TREE_OBJECTID);
- btrfs_set_dev_extent_chunk_offset(buf, dev_extent, 0);
-
- write_extent_buffer(buf, chunk_tree_uuid,
- (unsigned long)btrfs_dev_extent_chunk_tree_uuid(dev_extent),
- BTRFS_UUID_SIZE);
-
- btrfs_set_dev_extent_length(buf, dev_extent,
- BTRFS_MKFS_SYSTEM_GROUP_SIZE);
- nritems++;
-
- btrfs_set_header_bytenr(buf, cfg->blocks[4]);
- btrfs_set_header_owner(buf, BTRFS_DEV_TREE_OBJECTID);
- btrfs_set_header_nritems(buf, nritems);
- csum_tree_block_size(buf, BTRFS_CRC32_SIZE, 0);
- ret = pwrite(fd, buf->data, cfg->nodesize, cfg->blocks[4]);
- if (ret != cfg->nodesize) {
- ret = (ret < 0 ? -errno : -EIO);
- goto out;
- }
-
- /* create the FS root */
- memset(buf->data + sizeof(struct btrfs_header), 0,
- cfg->nodesize - sizeof(struct btrfs_header));
- btrfs_set_header_bytenr(buf, cfg->blocks[5]);
- btrfs_set_header_owner(buf, BTRFS_FS_TREE_OBJECTID);
- btrfs_set_header_nritems(buf, 0);
- csum_tree_block_size(buf, BTRFS_CRC32_SIZE, 0);
- ret = pwrite(fd, buf->data, cfg->nodesize, cfg->blocks[5]);
- if (ret != cfg->nodesize) {
- ret = (ret < 0 ? -errno : -EIO);
- goto out;
- }
- /* finally create the csum root */
- memset(buf->data + sizeof(struct btrfs_header), 0,
- cfg->nodesize - sizeof(struct btrfs_header));
- btrfs_set_header_bytenr(buf, cfg->blocks[6]);
- btrfs_set_header_owner(buf, BTRFS_CSUM_TREE_OBJECTID);
- btrfs_set_header_nritems(buf, 0);
- csum_tree_block_size(buf, BTRFS_CRC32_SIZE, 0);
- ret = pwrite(fd, buf->data, cfg->nodesize, cfg->blocks[6]);
- if (ret != cfg->nodesize) {
- ret = (ret < 0 ? -errno : -EIO);
- goto out;
- }
-
- /* and write out the super block */
- memset(buf->data, 0, BTRFS_SUPER_INFO_SIZE);
- memcpy(buf->data, &super, sizeof(super));
- buf->len = BTRFS_SUPER_INFO_SIZE;
- csum_tree_block_size(buf, BTRFS_CRC32_SIZE, 0);
- ret = pwrite(fd, buf->data, BTRFS_SUPER_INFO_SIZE, cfg->blocks[0]);
- if (ret != BTRFS_SUPER_INFO_SIZE) {
- ret = (ret < 0 ? -errno : -EIO);
- goto out;
- }
-
- ret = 0;
-
-out:
- free(buf);
- return ret;
-}
-
-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 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;
-}
-
-void btrfs_parse_features_to_string(char *buf, u64 flags)
-{
- int i;
-
- buf[0] = 0;
-
- for (i = 0; i < ARRAY_SIZE(mkfs_features); i++) {
- if (flags & mkfs_features[i].flag) {
- if (*buf)
- strcat(buf, ", ");
- strcat(buf, mkfs_features[i].name);
- }
- }
-}
-
-void btrfs_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);
- }
- }
-}
-
-void btrfs_list_all_fs_features(u64 mask_disallowed)
-{
- int i;
-
- fprintf(stderr, "Filesystem features available:\n");
- for (i = 0; i < ARRAY_SIZE(mkfs_features) - 1; i++) {
- const struct btrfs_fs_feature *feat = &mkfs_features[i];
- char *is_default = "";
-
- if (feat->flag & mask_disallowed)
- continue;
- if (feat->flag & BTRFS_MKFS_DEFAULT_FEATURES)
- is_default = ", default";
- fprintf(stderr, "%-20s- %s (0x%llx%s)\n", feat->name,
- feat->desc, feat->flag, is_default);
- }
-}
-
-/*
- * Return NULL if all features were parsed fine, otherwise return the name of
- * the first unparsed.
- */
-char* btrfs_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;
-}
-
-void print_kernel_version(FILE *stream, u32 version)
-{
- u32 v[3];
-
- v[0] = version & 0xFF;
- v[1] = (version >> 8) & 0xFF;
- v[2] = version >> 16;
- fprintf(stream, "%u.%u", v[2], v[1]);
- if (v[0])
- fprintf(stream, ".%u", v[0]);
-}
-
-u32 get_running_kernel_version(void)
-{
- struct utsname utsbuf;
- char *tmp;
- char *saveptr = NULL;
- u32 version;
-
- uname(&utsbuf);
- if (strcmp(utsbuf.sysname, "Linux") != 0) {
- error("unsupported system: %s", utsbuf.sysname);
- exit(1);
- }
- /* 1.2.3-4-name */
- tmp = strchr(utsbuf.release, '-');
- if (tmp)
- *tmp = 0;
-
- tmp = strtok_r(utsbuf.release, ".", &saveptr);
- if (!string_is_numerical(tmp))
- return (u32)-1;
- version = atoi(tmp) << 16;
- tmp = strtok_r(NULL, ".", &saveptr);
- if (!string_is_numerical(tmp))
- return (u32)-1;
- version |= atoi(tmp) << 8;
- tmp = strtok_r(NULL, ".", &saveptr);
- if (tmp) {
- if (!string_is_numerical(tmp))
- return (u32)-1;
- version |= atoi(tmp);
- }
-
- return version;
-}
-
u64 btrfs_device_size(int fd, struct stat *st)
{
u64 size;
return ret;
}
-#define ZERO_DEV_BYTES (2 * 1024 * 1024)
+#define ZERO_DEV_BYTES SZ_2M
/* don't write outside the device by clamping the region to the device size */
static int zero_dev_clamped(int fd, off_t start, ssize_t len, u64 dev_size)
u32 sectorsize)
{
struct btrfs_super_block *disk_super;
- struct btrfs_super_block *super = root->fs_info->super_copy;
+ struct btrfs_fs_info *fs_info = root->fs_info;
+ struct btrfs_super_block *super = fs_info->super_copy;
struct btrfs_device *device;
struct btrfs_dev_item *dev_item;
char *buf = NULL;
device->total_bytes = device_total_bytes;
device->bytes_used = 0;
device->total_ios = 0;
- device->dev_root = root->fs_info->dev_root;
+ device->dev_root = fs_info->dev_root;
device->name = strdup(path);
if (!device->name) {
ret = -ENOMEM;
}
INIT_LIST_HEAD(&device->dev_list);
- ret = btrfs_add_device(trans, root, device);
+ ret = btrfs_add_device(trans, fs_info, device);
if (ret)
goto out;
BUG_ON(ret != sectorsize);
free(buf);
- list_add(&device->dev_list, &root->fs_info->fs_devices->devices);
- device->fs_devices = root->fs_info->fs_devices;
+ list_add(&device->dev_list, &fs_info->fs_devices->devices);
+ device->fs_devices = fs_info->fs_devices;
return 0;
out:
memset(buf, 0, len);
ret = pwrite(fd, buf, len, offset);
if (ret < 0) {
- error("cannot wipe existing superblock: %s", strerror(errno));
+ error("cannot wipe existing superblock: %m");
ret = -1;
} else if (ret != len) {
error("cannot wipe existing superblock: wrote %d of %zd", ret, len);
ret = fstat(fd, &st);
if (ret < 0) {
- error("unable to stat %s: %s", file, strerror(errno));
+ error("unable to stat %s: %m", file);
return 1;
}
*/
if (discard_range(fd, 0, 0) == 0) {
if (opflags & PREP_DEVICE_VERBOSE)
- printf("Performing full device TRIM (%s) ...\n",
- pretty_size(block_count));
+ printf("Performing full device TRIM %s (%s) ...\n",
+ file, pretty_size(block_count));
discard_blocks(fd, 0, block_count);
}
}
btrfs_set_stack_inode_generation(&inode_item, trans->transid);
btrfs_set_stack_inode_size(&inode_item, 0);
btrfs_set_stack_inode_nlink(&inode_item, 1);
- btrfs_set_stack_inode_nbytes(&inode_item, root->nodesize);
+ btrfs_set_stack_inode_nbytes(&inode_item, root->fs_info->nodesize);
btrfs_set_stack_inode_mode(&inode_item, S_IFDIR | 0755);
btrfs_set_stack_timespec_sec(&inode_item.atime, now);
btrfs_set_stack_timespec_nsec(&inode_item.atime, 0);
return ret;
}
-static int is_reg_file(const char *path)
+int is_reg_file(const char *path)
{
struct stat statbuf;
return S_ISREG(statbuf.st_mode);
}
+int is_path_exist(const char *path)
+{
+ struct stat statbuf;
+ int ret;
+
+ ret = stat(path, &statbuf);
+ if (ret < 0) {
+ if (errno == ENOENT)
+ return 0;
+ else
+ return -errno;
+ }
+ return 1;
+}
+
/*
* This function checks if the given input parameter is
* an uuid or a path
fd = open(dev, O_RDONLY);
if (fd < 0) {
ret = -errno;
- error("cannot open %s: %s", dev, strerror(errno));
+ error("cannot open %s: %m", dev);
goto out;
}
return -1;
}
ret = open_file_or_dir(mp, dirstream);
- error_on(verbose && ret < 0, "can't access '%s': %s",
- path, strerror(errno));
+ error_on(verbose && ret < 0, "can't access '%s': %m",
+ path);
} else {
ret = btrfs_open_dir(path, dirstream, 1);
}
/*
* Do the following checks before calling open_file_or_dir():
* 1: path is in a btrfs filesystem
- * 2: path is a directory
+ * 2: path is a directory if dir_only is 1
*/
-int btrfs_open_dir(const char *path, DIR **dirstream, int verbose)
+int btrfs_open(const char *path, DIR **dirstream, int verbose, int dir_only)
{
struct statfs stfs;
struct stat st;
int ret;
if (statfs(path, &stfs) != 0) {
- error_on(verbose, "cannot access '%s': %s", path,
- strerror(errno));
+ error_on(verbose, "cannot access '%s': %m", path);
return -1;
}
}
if (stat(path, &st) != 0) {
- error_on(verbose, "cannot access '%s': %s", path,
- strerror(errno));
+ error_on(verbose, "cannot access '%s': %m", path);
return -1;
}
- if (!S_ISDIR(st.st_mode)) {
+ if (dir_only && !S_ISDIR(st.st_mode)) {
error_on(verbose, "not a directory: %s", path);
return -3;
}
ret = open_file_or_dir(path, dirstream);
if (ret < 0) {
- error_on(verbose, "cannot access '%s': %s", path,
- strerror(errno));
+ error_on(verbose, "cannot access '%s': %m", path);
}
return ret;
}
+int btrfs_open_dir(const char *path, DIR **dirstream, int verbose)
+{
+ return btrfs_open(path, dirstream, verbose, 1);
+}
+
+int btrfs_open_file_or_dir(const char *path, DIR **dirstream, int verbose)
+{
+ return btrfs_open(path, dirstream, verbose, 0);
+}
+
/* checks if a device is a loop device */
static int is_loop_device (const char* device) {
struct stat statbuf;
const char* file)
{
int ret;
- struct list_head *head;
- struct list_head *cur;
struct btrfs_device *device;
- head = &fs_devices->devices;
- list_for_each(cur, head) {
- device = list_entry(cur, struct btrfs_device, dev_list);
-
+ list_for_each_entry(device, &fs_devices->devices, dev_list) {
if((ret = is_same_loop_file(device->name, file)))
return ret;
}
fd = open(file, O_RDONLY);
if (fd < 0) {
- error("mount check: cannot open %s: %s", file,
- strerror(errno));
+ error("mount check: cannot open %s: %m", file);
return -errno;
}
fd = open("/dev/btrfs-control", O_RDWR);
if (fd < 0) {
warning(
- "failed to open /dev/btrfs-control, skipping device registration: %s",
- strerror(errno));
+ "failed to open /dev/btrfs-control, skipping device registration: %m");
return -errno;
}
memset(&args, 0, sizeof(args));
strncpy_null(args.name, fname);
ret = ioctl(fd, BTRFS_IOC_SCAN_DEV, &args);
if (ret < 0) {
- error("device scan failed on '%s': %s", fname,
- strerror(errno));
+ error("device scan failed on '%s': %m", fname);
ret = -errno;
}
close(fd);
int mult = 0;
const char** suffix = NULL;
u64 last_size;
+ int negative;
if (str_size == 0)
return 0;
+ negative = !!(unit_mode & UNITS_NEGATIVE);
+ unit_mode &= ~UNITS_NEGATIVE;
+
if ((unit_mode & ~UNITS_MODE_MASK) == UNITS_RAW) {
- snprintf(str, str_size, "%llu", size);
+ if (negative)
+ snprintf(str, str_size, "%lld", size);
+ else
+ snprintf(str, str_size, "%llu", size);
return 0;
}
num_divs = 0;
break;
default:
- while (size >= mult) {
- last_size = size;
- size /= mult;
- num_divs++;
+ if (negative) {
+ s64 ssize = (s64)size;
+ s64 last_ssize = ssize;
+
+ while ((ssize < 0 ? -ssize : ssize) >= mult) {
+ last_ssize = ssize;
+ ssize /= mult;
+ num_divs++;
+ }
+ last_size = (u64)last_ssize;
+ } else {
+ while (size >= mult) {
+ last_size = size;
+ size /= mult;
+ num_divs++;
+ }
}
/*
* If the value is smaller than base, we didn't do any
assert(0);
return -1;
}
- fraction = (float)last_size / base;
+
+ if (negative) {
+ fraction = (float)(s64)last_size / base;
+ } else {
+ fraction = (float)last_size / base;
+ }
return snprintf(str, str_size, "%.2f%s", fraction, suffix[num_divs]);
}
return -1;
trans = btrfs_start_transaction(root, 1);
+ BUG_ON(IS_ERR(trans));
__strncpy_null(root->fs_info->super_copy->label, label, BTRFS_LABEL_SIZE - 1);
btrfs_commit_transaction(trans, root);
fd = open(mount_path, O_RDONLY | O_NOATIME);
if (fd < 0) {
- error("unable to access %s: %s", mount_path, strerror(errno));
+ error("unable to access %s: %m", mount_path);
return -1;
}
memset(label, 0, sizeof(label));
__strncpy_null(label, labelp, BTRFS_LABEL_SIZE - 1);
if (ioctl(fd, BTRFS_IOC_SET_FSLABEL, label) < 0) {
- error("unable to set label of %s: %s", mount_path,
- strerror(errno));
+ error("unable to set label of %s: %m", mount_path);
close(fd);
return -1;
}
fd = open(mount_path, O_RDONLY | O_NOATIME);
if (fd < 0) {
- error("unable to access %s: %s", mount_path, strerror(errno));
+ error("unable to access %s: %m", mount_path);
return -1;
}
ret = ioctl(fd, BTRFS_IOC_GET_FSLABEL, label);
if (ret < 0) {
if (errno != ENOTTY)
- error("unable to get label of %s: %s", mount_path,
- strerror(errno));
+ error("unable to get label of %s: %m", mount_path);
ret = -errno;
close(fd);
return ret;
char *s = strchr(p, '/');
const char *ptr_src_end = p + strlen(p);
char *ptr_parse_end = NULL;
+ enum btrfs_util_error err;
u64 level;
u64 id;
int fd;
path:
/* Path format like subv at 'my_subvol' is the fallback case */
- ret = test_issubvolume(p);
- if (ret < 0 || !ret)
+ err = btrfs_util_is_subvolume(p);
+ if (err)
goto err;
fd = open(p, O_RDONLY);
if (fd < 0)
void close_file_or_dir(int fd, DIR *dirstream)
{
- if (dirstream)
+ int old_errno;
+
+ old_errno = errno;
+ if (dirstream) {
closedir(dirstream);
- else if (fd >= 0)
+ } else if (fd >= 0) {
close(fd);
+ }
+
+ errno = old_errno;
}
int get_device_info(int fd, u64 devid,
fd = open(path, O_RDONLY);
if (fd < 0) {
ret = -errno;
- error("cannot open %s: %s", path, strerror(errno));
+ error("cannot open %s: %m", path);
goto out;
}
ret = check_mounted_where(fd, path, mp, sizeof(mp),
return ret;
}
-#define isoctal(c) (((c) & ~7) == '0')
-
-static inline void translate(char *f, char *t)
-{
- while (*f != '\0') {
- if (*f == '\\' &&
- isoctal(f[1]) && isoctal(f[2]) && isoctal(f[3])) {
- *t++ = 64*(f[1] & 7) + 8*(f[2] & 7) + (f[3] & 7);
- f += 4;
- } else
- *t++ = *f++;
- }
- *t = '\0';
- return;
-}
-
-/*
- * Checks if the swap device.
- * Returns 1 if swap device, < 0 on error or 0 if not swap device.
- */
-static int is_swap_device(const char *file)
+int get_fsid(const char *path, u8 *fsid, int silent)
{
- FILE *f;
- struct stat st_buf;
- dev_t dev;
- ino_t ino = 0;
- char tmp[PATH_MAX];
- char buf[PATH_MAX];
- char *cp;
- int ret = 0;
-
- if (stat(file, &st_buf) < 0)
- return -errno;
- if (S_ISBLK(st_buf.st_mode))
- dev = st_buf.st_rdev;
- else if (S_ISREG(st_buf.st_mode)) {
- dev = st_buf.st_dev;
- ino = st_buf.st_ino;
- } else
- return 0;
+ int ret;
+ int fd;
+ struct btrfs_ioctl_fs_info_args args;
- if ((f = fopen("/proc/swaps", "r")) == NULL)
- return 0;
+ fd = open(path, O_RDONLY);
+ if (fd < 0) {
+ ret = -errno;
+ if (!silent)
+ error("failed to open %s: %s", path,
+ strerror(-ret));
+ goto out;
+ }
- /* skip the first line */
- if (fgets(tmp, sizeof(tmp), f) == NULL)
+ ret = ioctl(fd, BTRFS_IOC_FS_INFO, &args);
+ if (ret < 0) {
+ ret = -errno;
goto out;
-
- while (fgets(tmp, sizeof(tmp), f) != NULL) {
- if ((cp = strchr(tmp, ' ')) != NULL)
- *cp = '\0';
- if ((cp = strchr(tmp, '\t')) != NULL)
- *cp = '\0';
- translate(tmp, buf);
- if (stat(buf, &st_buf) != 0)
- continue;
- if (S_ISBLK(st_buf.st_mode)) {
- if (dev == st_buf.st_rdev) {
- ret = 1;
- break;
- }
- } else if (S_ISREG(st_buf.st_mode)) {
- if (dev == st_buf.st_dev && ino == st_buf.st_ino) {
- ret = 1;
- break;
- }
- }
}
-out:
- fclose(f);
+ memcpy(fsid, args.fsid, BTRFS_FSID_SIZE);
+ ret = 0;
+out:
+ if (fd != -1)
+ close(fd);
return ret;
}
-/*
- * Check for existing filesystem or partition table on device.
- * Returns:
- * 1 for existing fs or partition
- * 0 for nothing found
- * -1 for internal error
- */
-static int check_overwrite(const char *device)
+int is_seen_fsid(u8 *fsid, struct seen_fsid *seen_fsid_hash[])
{
- const char *type;
- blkid_probe pr = NULL;
- int ret;
- blkid_loff_t size;
+ u8 hash = fsid[0];
+ int slot = hash % SEEN_FSID_HASH_SIZE;
+ struct seen_fsid *seen = seen_fsid_hash[slot];
- if (!device || !*device)
- return 0;
+ while (seen) {
+ if (memcmp(seen->fsid, fsid, BTRFS_FSID_SIZE) == 0)
+ return 1;
- ret = -1; /* will reset on success of all setup calls */
+ seen = seen->next;
+ }
- pr = blkid_new_probe_from_filename(device);
- if (!pr)
- goto out;
+ return 0;
+}
- size = blkid_probe_get_size(pr);
- if (size < 0)
- goto out;
+int add_seen_fsid(u8 *fsid, struct seen_fsid *seen_fsid_hash[],
+ int fd, DIR *dirstream)
+{
+ u8 hash = fsid[0];
+ int slot = hash % SEEN_FSID_HASH_SIZE;
+ struct seen_fsid *seen = seen_fsid_hash[slot];
+ struct seen_fsid *alloc;
- /* nothing to overwrite on a 0-length device */
- if (size == 0) {
- ret = 0;
- goto out;
- }
+ if (!seen)
+ goto insert;
- ret = blkid_probe_enable_partitions(pr, 1);
- if (ret < 0)
- goto out;
+ while (1) {
+ if (memcmp(seen->fsid, fsid, BTRFS_FSID_SIZE) == 0)
+ return -EEXIST;
- ret = blkid_do_fullprobe(pr);
- if (ret < 0)
- goto out;
+ if (!seen->next)
+ break;
- /*
- * Blkid returns 1 for nothing found and 0 when it finds a signature,
- * but we want the exact opposite, so reverse the return value here.
- *
- * In addition print some useful diagnostics about what actually is
- * on the device.
- */
- if (ret) {
- ret = 0;
- goto out;
+ seen = seen->next;
}
- if (!blkid_probe_lookup_value(pr, "TYPE", &type, NULL)) {
- fprintf(stderr,
- "%s appears to contain an existing "
- "filesystem (%s).\n", device, type);
- } else if (!blkid_probe_lookup_value(pr, "PTTYPE", &type, NULL)) {
- fprintf(stderr,
- "%s appears to contain a partition "
- "table (%s).\n", device, type);
- } else {
- fprintf(stderr,
- "%s appears to contain something weird "
- "according to blkid\n", device);
- }
- ret = 1;
+insert:
+ alloc = malloc(sizeof(*alloc));
+ if (!alloc)
+ return -ENOMEM;
-out:
- if (pr)
- blkid_free_probe(pr);
- if (ret == -1)
- fprintf(stderr,
- "probe of %s failed, cannot detect "
- "existing filesystem.\n", device);
- return ret;
+ alloc->next = NULL;
+ memcpy(alloc->fsid, fsid, BTRFS_FSID_SIZE);
+ alloc->fd = fd;
+ alloc->dirstream = dirstream;
+
+ if (seen)
+ seen->next = alloc;
+ else
+ seen_fsid_hash[slot] = alloc;
+
+ return 0;
+}
+
+void free_seen_fsid(struct seen_fsid *seen_fsid_hash[])
+{
+ int slot;
+ struct seen_fsid *seen;
+ struct seen_fsid *next;
+
+ for (slot = 0; slot < SEEN_FSID_HASH_SIZE; slot++) {
+ seen = seen_fsid_hash[slot];
+ while (seen) {
+ next = seen->next;
+ close_file_or_dir(seen->fd, seen->dirstream);
+ free(seen);
+ seen = next;
+ }
+ seen_fsid_hash[slot] = NULL;
+ }
}
static int group_profile_devs_min(u64 flag)
}
}
-/*
- * Check if a device is suitable for btrfs
- * returns:
- * 1: something is wrong, an error is printed
- * 0: all is fine
- */
-int test_dev_for_mkfs(const char *file, int force_overwrite)
-{
- int ret, fd;
- struct stat st;
-
- ret = is_swap_device(file);
- if (ret < 0) {
- error("checking status of %s: %s", file, strerror(-ret));
- return 1;
- }
- if (ret == 1) {
- error("%s is a swap device", file);
- return 1;
- }
- if (!force_overwrite) {
- if (check_overwrite(file)) {
- error("use the -f option to force overwrite of %s",
- file);
- return 1;
- }
- }
- ret = check_mounted(file);
- if (ret < 0) {
- error("cannot check mount status of %s: %s", file,
- strerror(-ret));
- return 1;
- }
- if (ret == 1) {
- error("%s is mounted", file);
- return 1;
- }
- /* check if the device is busy */
- fd = open(file, O_RDWR|O_EXCL);
- if (fd < 0) {
- error("unable to open %s: %s", file, strerror(errno));
- return 1;
- }
- if (fstat(fd, &st)) {
- error("unable to stat %s: %s", file, strerror(errno));
- close(fd);
- return 1;
- }
- if (!S_ISBLK(st.st_mode)) {
- error("%s is not a block device", file);
- close(fd);
- return 1;
- }
- close(fd);
- return 0;
-}
-
int btrfs_scan_devices(void)
{
int fd = -1;
fd = open(path, O_RDONLY);
if (fd < 0) {
- error("cannot open %s: %s", path, strerror(errno));
+ error("cannot open %s: %m", path);
continue;
}
ret = btrfs_scan_one_device(fd, path, &tmp_devices,
return 0;
}
-int is_vol_small(const char *file)
-{
- int fd = -1;
- int e;
- struct stat st;
- u64 size;
-
- fd = open(file, O_RDONLY);
- if (fd < 0)
- return -errno;
- if (fstat(fd, &st) < 0) {
- e = -errno;
- close(fd);
- return e;
- }
- size = btrfs_device_size(fd, &st);
- if (size == 0) {
- close(fd);
- return -1;
- }
- if (size < BTRFS_MKFS_SMALL_VOLUME_SIZE) {
- close(fd);
- return 1;
- } else {
- close(fd);
- return 0;
- }
-}
-
/*
* This reads a line from the stdin and only returns non-zero if the
* first whitespace delimited token is a case insensitive match with yes
}
/*
- * For a given:
- * - file or directory return the containing tree root id
- * - subvolume return its own tree id
- * - BTRFS_EMPTY_SUBVOL_DIR_OBJECTID (directory with ino == 2) the result is
- * undefined and function returns -1
- */
-int lookup_path_rootid(int fd, u64 *rootid)
-{
- struct btrfs_ioctl_ino_lookup_args args;
- int ret;
-
- memset(&args, 0, sizeof(args));
- args.treeid = 0;
- args.objectid = BTRFS_FIRST_FREE_OBJECTID;
-
- ret = ioctl(fd, BTRFS_IOC_INO_LOOKUP, &args);
- if (ret < 0)
- return -errno;
-
- *rootid = args.treeid;
-
- return 0;
-}
-
-/*
* return 0 if a btrfs mount point is found
* return 1 if a mount point is found but not btrfs
* return <0 if something goes wrong
return ret;
}
-int test_minimum_size(const char *file, u32 nodesize)
-{
- int fd;
- struct stat statbuf;
-
- fd = open(file, O_RDONLY);
- if (fd < 0)
- return -errno;
- if (stat(file, &statbuf) < 0) {
- close(fd);
- return -errno;
- }
- if (btrfs_device_size(fd, &statbuf) < btrfs_min_dev_size(nodesize)) {
- close(fd);
- return 1;
- }
- close(fd);
- return 0;
-}
-
-
/*
* Test if path is a directory
* Returns:
return unit_mode;
}
+u64 div_factor(u64 num, int factor)
+{
+ if (factor == 10)
+ return num;
+ num *= factor;
+ num /= 10;
+ return num;
+}
+/*
+ * Get the length of the string converted from a u64 number.
+ *
+ * Result is equal to log10(num) + 1, but without the use of math library.
+ */
+int count_digits(u64 num)
+{
+ int ret = 0;
+
+ if (num == 0)
+ return 1;
+ while (num > 0) {
+ ret++;
+ num /= 10;
+ }
+ return ret;
+}
+
int string_is_numerical(const char *str)
{
+ if (!str)
+ return 0;
if (!(*str >= '0' && *str <= '9'))
return 0;
while (*str >= '0' && *str <= '9')
return 1;
}
-/*
- * Preprocess @argv with getopt_long to reorder options and consume the "--"
- * option separator.
- * Unknown short and long options are reported, optionally the @usage is printed
- * before exit.
- */
-void clean_args_no_options(int argc, char *argv[], const char * const *usagestr)
-{
- static const struct option long_options[] = {
- {NULL, 0, NULL, 0}
- };
-
- while (1) {
- int c = getopt_long(argc, argv, "", long_options, NULL);
-
- if (c < 0)
- break;
-
- switch (c) {
- default:
- if (usagestr)
- usage(usagestr);
- }
- }
-}
-
-/*
- * Same as clean_args_no_options but pass through arguments that could look
- * like short options. Eg. reisze which takes a negative resize argument like
- * '-123M' .
- *
- * This accepts only two forms:
- * - "-- option1 option2 ..."
- * - "option1 option2 ..."
- */
-void clean_args_no_options_relaxed(int argc, char *argv[], const char * const *usagestr)
+int prefixcmp(const char *str, const char *prefix)
{
- if (argc <= 1)
- return;
-
- if (strcmp(argv[1], "--") == 0)
- optind = 2;
+ for (; ; str++, prefix++)
+ if (!*prefix)
+ return 0;
+ else if (*str != *prefix)
+ return (unsigned char)*prefix - (unsigned char)*str;
}
/* Subvolume helper functions */
strcmp(name, ".") && strcmp(name, "..");
}
-/*
- * Test if path is a subvolume
- * Returns:
- * 0 - path exists but it is not a subvolume
- * 1 - path exists and it is a subvolume
- * < 0 - error
- */
-int test_issubvolume(const char *path)
-{
- struct stat st;
- struct statfs stfs;
- int res;
-
- res = stat(path, &st);
- if (res < 0)
- return -errno;
-
- if (st.st_ino != BTRFS_FIRST_FREE_OBJECTID || !S_ISDIR(st.st_mode))
- return 0;
-
- res = statfs(path, &stfs);
- if (res < 0)
- return -errno;
-
- return (int)stfs.f_type == BTRFS_SUPER_MAGIC;
-}
-
const char *subvol_strip_mountpoint(const char *mnt, const char *full_path)
{
int len = strlen(mnt);
if (!len)
return full_path;
+ if ((strncmp(mnt, full_path, len) != 0) || (full_path[len] != '/')) {
+ error("not on mount point: %s", mnt);
+ exit(1);
+ }
+
if (mnt[len - 1] != '/')
len += 1;
return full_path + len;
}
-/*
- * Returns
- * <0: Std error
- * 0: All fine
- * 1: Error; and error info printed to the terminal. Fixme.
- * 2: If the fullpath is root tree instead of subvol tree
- */
-int get_subvol_info(const char *fullpath, struct root_info *get_ri)
-{
- u64 sv_id;
- int ret = 1;
- int fd = -1;
- int mntfd = -1;
- char *mnt = NULL;
- const char *svpath = NULL;
- DIR *dirstream1 = NULL;
- DIR *dirstream2 = NULL;
-
- ret = test_issubvolume(fullpath);
- if (ret < 0)
- return ret;
- if (!ret) {
- error("not a subvolume: %s", fullpath);
- return 1;
- }
-
- ret = find_mount_root(fullpath, &mnt);
- if (ret < 0)
- return ret;
- if (ret > 0) {
- error("%s doesn't belong to btrfs mount point", fullpath);
- return 1;
- }
- ret = 1;
- svpath = subvol_strip_mountpoint(mnt, fullpath);
-
- fd = btrfs_open_dir(fullpath, &dirstream1, 1);
- if (fd < 0)
- goto out;
-
- ret = btrfs_list_get_path_rootid(fd, &sv_id);
- if (ret)
- goto out;
-
- mntfd = btrfs_open_dir(mnt, &dirstream2, 1);
- if (mntfd < 0)
- goto out;
-
- memset(get_ri, 0, sizeof(*get_ri));
- get_ri->root_id = sv_id;
-
- if (sv_id == BTRFS_FS_TREE_OBJECTID)
- ret = btrfs_get_toplevel_subvol(mntfd, get_ri);
- else
- ret = btrfs_get_subvol(mntfd, get_ri);
- if (ret)
- error("can't find '%s': %d", svpath, ret);
-
-out:
- close_file_or_dir(mntfd, dirstream2);
- close_file_or_dir(fd, dirstream1);
- free(mnt);
-
- return ret;
-}
-
+/* Set the seed manually */
void init_rand_seed(u64 seed)
{
int i;
return (u32)jrand48(rand_seed);
}
+/* Return random number in range [0, upper) */
unsigned int rand_range(unsigned int upper)
{
__init_seed();
*/
return (unsigned int)(jrand48(rand_seed) % upper);
}
+
+int rand_int(void)
+{
+ return (int)(rand_u32());
+}
+
+u64 rand_u64(void)
+{
+ u64 ret = 0;
+
+ ret += rand_u32();
+ ret <<= 32;
+ ret += rand_u32();
+ return ret;
+}
+
+u16 rand_u16(void)
+{
+ return (u16)(rand_u32());
+}
+
+u8 rand_u8(void)
+{
+ return (u8)(rand_u32());
+}
+
+void btrfs_config_init(void)
+{
+}
+
+/* Returns total size of main memory in bytes, -1UL if error. */
+unsigned long total_memory(void)
+{
+ struct sysinfo si;
+
+ if (sysinfo(&si) < 0) {
+ error("can't determine memory size");
+ return -1UL;
+ }
+ return si.totalram * si.mem_unit; /* bytes */
+}
+
+void print_device_info(struct btrfs_device *device, char *prefix)
+{
+ if (prefix)
+ printf("%s", prefix);
+ printf("Device: id = %llu, name = %s\n",
+ device->devid, device->name);
+}
+
+void print_all_devices(struct list_head *devices)
+{
+ struct btrfs_device *dev;
+
+ printf("All Devices:\n");
+ list_for_each_entry(dev, devices, dev_list)
+ print_device_info(dev, "\t");
+ printf("\n");
+}
projects / platform / upstream / btrfs-progs.git / blobdiff