#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 <linux/magic.h>
#include <getopt.h>
+#include <btrfsutil.h>
+
#include "kerncompat.h"
#include "radix-tree.h"
#include "ctree.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";
-
-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;
-}
+static int rand_seed_initlized = 0;
+static unsigned short rand_seed[3];
+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;
}
-/*
- * @fs_uuid - if NULL, generates a UUID, returns back the new filesystem UUID
- */
-int make_btrfs(int fd, struct btrfs_mkfs_config *cfg)
-{
- 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;
-
- 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 && *cfg->fs_uuid) {
- if (uuid_parse(cfg->fs_uuid, super.fsid) != 0) {
- fprintf(stderr, "could not parse UUID: %s\n",
- cfg->fs_uuid);
- ret = -EINVAL;
- goto out;
- }
- if (!test_uuid_unique(cfg->fs_uuid)) {
- fprintf(stderr, "non-unique UUID: %s\n", cfg->fs_uuid);
- ret = -EBUSY;
- goto out;
- }
- } else {
- uuid_generate(super.fsid);
- if (cfg->fs_uuid)
- 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);
- 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(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);
-
- BUG_ON(cfg->blocks[i] < first_free);
- BUG_ON(cfg->blocks[i] < cfg->blocks[i - 1]);
-
- /* 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 */
- BUG_ON(sizeof(super) > cfg->sectorsize);
- 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++) {
- char *is_default = "";
-
- if (mkfs_features[i].flag & mask_disallowed)
- continue;
- if (mkfs_features[i].flag & BTRFS_MKFS_DEFAULT_FEATURES)
- is_default = ", default";
- fprintf(stderr, "%-20s- %s (0x%llx%s)\n",
- mkfs_features[i].name,
- mkfs_features[i].desc,
- mkfs_features[i].flag,
- is_default);
- }
-}
-
-/*
- * 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;
-}
-
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)
}
int btrfs_add_to_fsid(struct btrfs_trans_handle *trans,
- struct btrfs_root *root, int fd, char *path,
+ struct btrfs_root *root, int fd, const char *path,
u64 device_total_bytes, u32 io_width, u32 io_align,
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 / sectorsize) * sectorsize;
- device = kzalloc(sizeof(*device), GFP_NOFS);
- if (!device)
- goto err_nomem;
- buf = kzalloc(sectorsize, GFP_NOFS);
- if (!buf)
- goto err_nomem;
- BUG_ON(sizeof(*disk_super) > sectorsize);
+ device = calloc(1, sizeof(*device));
+ if (!device) {
+ ret = -ENOMEM;
+ goto out;
+ }
+ buf = calloc(1, sectorsize);
+ if (!buf) {
+ ret = -ENOMEM;
+ goto out;
+ }
disk_super = (struct btrfs_super_block *)buf;
dev_item = &disk_super->dev_item;
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)
- goto err_nomem;
+ if (!device->name) {
+ ret = -ENOMEM;
+ goto out;
+ }
INIT_LIST_HEAD(&device->dev_list);
- ret = btrfs_add_device(trans, root, device);
- BUG_ON(ret);
+ ret = btrfs_add_device(trans, fs_info, device);
+ if (ret)
+ goto out;
fs_total_bytes = btrfs_super_total_bytes(super) + device_total_bytes;
btrfs_set_super_total_bytes(super, fs_total_bytes);
ret = pwrite(fd, buf, sectorsize, BTRFS_SUPER_INFO_OFFSET);
BUG_ON(ret != sectorsize);
- kfree(buf);
- list_add(&device->dev_list, &root->fs_info->fs_devices->devices);
- device->fs_devices = root->fs_info->fs_devices;
+ free(buf);
+ list_add(&device->dev_list, &fs_info->fs_devices->devices);
+ device->fs_devices = fs_info->fs_devices;
return 0;
-err_nomem:
- kfree(device);
- kfree(buf);
- return -ENOMEM;
+out:
+ free(device);
+ free(buf);
+ return ret;
}
static int btrfs_wipe_existing_sb(int fd)
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);
return ret;
}
-int btrfs_prepare_device(int fd, char *file, int zero_end, u64 *block_count_ret,
- u64 max_block_count, int discard)
+int btrfs_prepare_device(int fd, const char *file, u64 *block_count_ret,
+ u64 max_block_count, unsigned opflags)
{
u64 block_count;
struct stat st;
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 (max_block_count)
block_count = min(block_count, max_block_count);
- if (discard) {
+ if (opflags & PREP_DEVICE_DISCARD) {
/*
* We intentionally ignore errors from the discard ioctl. It
* is not necessary for the mkfs functionality but just an
* optimization.
*/
if (discard_range(fd, 0, 0) == 0) {
- printf("Performing full device TRIM (%s) ...\n",
- pretty_size(block_count));
+ if (opflags & PREP_DEVICE_VERBOSE)
+ printf("Performing full device TRIM %s (%s) ...\n",
+ file, pretty_size(block_count));
discard_blocks(fd, 0, block_count);
}
}
for (i = 0 ; !ret && i < BTRFS_SUPER_MIRROR_MAX; i++)
ret = zero_dev_clamped(fd, btrfs_sb_offset(i),
BTRFS_SUPER_INFO_SIZE, block_count);
- if (!ret && zero_end)
+ if (!ret && (opflags & PREP_DEVICE_ZERO_END))
ret = zero_dev_clamped(fd, block_count - ZERO_DEV_BYTES,
ZERO_DEV_BYTES, 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);
btrfs_set_stack_timespec_nsec(&inode_item.ctime, 0);
btrfs_set_stack_timespec_sec(&inode_item.mtime, now);
btrfs_set_stack_timespec_nsec(&inode_item.mtime, 0);
- btrfs_set_stack_timespec_sec(&inode_item.otime, 0);
+ btrfs_set_stack_timespec_sec(&inode_item.otime, now);
btrfs_set_stack_timespec_nsec(&inode_item.otime, 0);
if (root->fs_info->tree_root == root)
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;
}
/* scan the initial device */
ret = btrfs_scan_one_device(fd, file, &fs_devices_mnt,
- &total_devs, BTRFS_SUPER_INFO_OFFSET, 0);
+ &total_devs, BTRFS_SUPER_INFO_OFFSET, SBREAD_DEFAULT);
is_btrfs = (ret >= 0);
/* scan other devices */
if (is_btrfs && total_devs > 1) {
- ret = btrfs_scan_lblkid();
+ ret = btrfs_scan_devices();
if (ret)
return ret;
}
- /* iterate over the list of currently mountes filesystems */
+ /* iterate over the list of currently mounted filesystems */
if ((f = setmntent ("/proc/self/mounts", "r")) == NULL)
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);
/*
* Register all devices in the fs_uuid list created in the user
- * space. Ensure btrfs_scan_lblkid() is called before this func.
+ * space. Ensure btrfs_scan_devices() is called before this func.
*/
int btrfs_register_all_devices(void)
{
ret = 0;
disk_super = (struct btrfs_super_block *)buf;
- if (btrfs_super_magic(disk_super) != BTRFS_MAGIC)
+ /*
+ * Accept devices from the same filesystem, allow partially created
+ * structures.
+ */
+ if (btrfs_super_magic(disk_super) != BTRFS_MAGIC &&
+ btrfs_super_magic(disk_super) != BTRFS_MAGIC_PARTIAL)
goto brelse;
if (!memcmp(disk_super->fsid, root->fs_info->super_copy->fsid,
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]);
}
/*
- * __strncpy__null - strncpy with null termination
+ * __strncpy_null - strncpy with null termination
* @dest: the target array
* @src: the source string
* @n: maximum bytes to copy (size of *dest)
* byte ('\0'), to the buffer pointed to by dest, up to a maximum
* of n bytes. Then ensure that dest is null-terminated.
*/
-char *__strncpy__null(char *dest, const char *src, size_t n)
+char *__strncpy_null(char *dest, const char *src, size_t n)
{
strncpy(dest, src, n);
if (n > 0)
int len = strlen(input);
if (len > BTRFS_LABEL_SIZE - 1) {
- fprintf(stderr, "ERROR: Label %s is too long (max %d)\n",
- input, BTRFS_LABEL_SIZE - 1);
+ error("label %s is too long (max %d)", input,
+ BTRFS_LABEL_SIZE - 1);
return -1;
}
ret = check_mounted(dev);
if (ret < 0) {
- fprintf(stderr, "FATAL: error checking %s mount status\n", dev);
+ error("checking mount status of %s failed: %d", dev, ret);
return -1;
}
if (ret > 0) {
- fprintf(stderr, "ERROR: dev %s is mounted, use mount point\n",
- dev);
+ error("device %s is mounted, use mount point", dev);
return -1;
}
return -1;
trans = btrfs_start_transaction(root, 1);
- snprintf(root->fs_info->super_copy->label, BTRFS_LABEL_SIZE, "%s",
- label);
+ BUG_ON(IS_ERR(trans));
+ __strncpy_null(root->fs_info->super_copy->label, label, BTRFS_LABEL_SIZE - 1);
+
btrfs_commit_transaction(trans, root);
/* Now we close it since we are done. */
fd = open(mount_path, O_RDONLY | O_NOATIME);
if (fd < 0) {
- fprintf(stderr, "ERROR: unable to access '%s'\n", mount_path);
+ error("unable to access %s: %m", mount_path);
return -1;
}
memset(label, 0, sizeof(label));
- strncpy(label, labelp, sizeof(label));
+ __strncpy_null(label, labelp, BTRFS_LABEL_SIZE - 1);
if (ioctl(fd, BTRFS_IOC_SET_FSLABEL, label) < 0) {
- fprintf(stderr, "ERROR: unable to set label %s\n",
- strerror(errno));
+ error("unable to set label of %s: %m", mount_path);
close(fd);
return -1;
}
ret = check_mounted(dev);
if (ret < 0) {
- fprintf(stderr, "FATAL: error checking %s mount status\n", dev);
+ error("checking mount status of %s failed: %d", dev, ret);
return -1;
}
if(!root)
return -1;
- memcpy(label, root->fs_info->super_copy->label, BTRFS_LABEL_SIZE);
+ __strncpy_null(label, root->fs_info->super_copy->label,
+ BTRFS_LABEL_SIZE - 1);
/* Now we close it since we are done. */
close_ctree(root);
fd = open(mount_path, O_RDONLY | O_NOATIME);
if (fd < 0) {
- fprintf(stderr, "ERROR: unable to access '%s'\n", mount_path);
+ error("unable to access %s: %m", mount_path);
return -1;
}
ret = ioctl(fd, BTRFS_IOC_GET_FSLABEL, label);
if (ret < 0) {
if (errno != ENOTTY)
- fprintf(stderr, "ERROR: unable to get label %s\n",
- strerror(errno));
+ error("unable to get label of %s: %m", mount_path);
ret = -errno;
close(fd);
return ret;
}
- strncpy(labelp, label, sizeof(label));
+ __strncpy_null(labelp, label, BTRFS_LABEL_SIZE - 1);
close(fd);
return 0;
}
u64 ret;
if (!s) {
- fprintf(stderr, "ERROR: Size value is empty\n");
+ error("size value is empty");
exit(1);
}
if (s[0] == '-') {
- fprintf(stderr,
- "ERROR: Size value '%s' is less equal than 0\n", s);
+ error("size value '%s' is less equal than 0", s);
exit(1);
}
ret = strtoull(s, &endptr, 10);
if (endptr == s) {
- fprintf(stderr, "ERROR: Size value '%s' is invalid\n", s);
+ error("size value '%s' is invalid", s);
exit(1);
}
if (endptr[0] && endptr[1]) {
- fprintf(stderr, "ERROR: Illegal suffix contains character '%c' in wrong position\n",
+ error("illegal suffix contains character '%c' in wrong position",
endptr[1]);
exit(1);
}
* need to call strtoull to get the real size
*/
if (errno == ERANGE && ret == ULLONG_MAX) {
- fprintf(stderr,
- "ERROR: Size value '%s' is too large for u64\n", s);
+ error("size value '%s' is too large for u64", s);
exit(1);
}
if (endptr[0]) {
case 'b':
break;
default:
- fprintf(stderr, "ERROR: Unknown size descriptor '%c'\n",
- c);
+ error("unknown size descriptor '%c'", c);
exit(1);
}
}
/* Check whether ret * mult overflow */
if (fls64(ret) + fls64(mult) - 1 > 64) {
- fprintf(stderr,
- "ERROR: Size value '%s' is too large for u64\n", s);
+ error("size value '%s' is too large for u64", s);
exit(1);
}
ret *= mult;
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)
goto err;
- ret = lookup_ino_rootid(fd, &id);
+ ret = lookup_path_rootid(fd, &id);
+ if (ret)
+ error("failed to lookup root id: %s", strerror(-ret));
close(fd);
if (ret < 0)
goto err;
return id;
err:
- fprintf(stderr, "ERROR: invalid qgroupid or subvolume path: %s\n", p);
+ error("invalid qgroupid or subvolume path: %s", p);
exit(-1);
}
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,
*
* Returns 0 on success, or a negative errno.
*/
-int get_fs_info(char *path, struct btrfs_ioctl_fs_info_args *fi_args,
+int get_fs_info(const char *path, struct btrfs_ioctl_fs_info_args *fi_args,
struct btrfs_ioctl_dev_info_args **di_ret)
{
int fd = -1;
int ret = 0;
int ndevs = 0;
- int i = 0;
+ u64 last_devid = 0;
int replacing = 0;
struct btrfs_fs_devices *fs_devices_mnt = NULL;
struct btrfs_ioctl_dev_info_args *di_args;
if (is_block_device(path) == 1) {
struct btrfs_super_block *disk_super;
char buf[BTRFS_SUPER_INFO_SIZE];
- u64 devid;
/* Ensure it's mounted, then set path to the mountpoint */
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),
ret = -EIO;
goto out;
}
- devid = btrfs_stack_device_id(&disk_super->dev_item);
-
- fi_args->max_id = devid;
- i = devid;
+ last_devid = btrfs_stack_device_id(&disk_super->dev_item);
+ fi_args->max_id = last_devid;
memcpy(fi_args->fsid, fs_devices_mnt->fsid, BTRFS_FSID_SIZE);
close(fd);
fi_args->num_devices++;
ndevs++;
replacing = 1;
- if (i == 0)
- i++;
+ if (last_devid == 0)
+ last_devid++;
}
}
if (replacing)
memcpy(di_args, &tmp, sizeof(tmp));
- for (; i <= fi_args->max_id; ++i) {
- ret = get_device_info(fd, i, &di_args[ndevs]);
+ for (; last_devid <= fi_args->max_id; last_devid++) {
+ ret = get_device_info(fd, last_devid, &di_args[ndevs]);
if (ret == -ENODEV)
continue;
if (ret)
return ret;
}
-#define isoctal(c) (((c) & ~7) == '0')
-
-static inline void translate(char *f, char *t)
+int get_fsid(const char *path, u8 *fsid, int silent)
{
- 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)
-{
- 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;
-
- if ((f = fopen("/proc/swaps", "r")) == NULL)
- return 0;
+ int ret;
+ int fd;
+ struct btrfs_ioctl_fs_info_args args;
- /* skip the first line */
- if (fgets(tmp, sizeof(tmp), f) == NULL)
+ fd = open(path, O_RDONLY);
+ if (fd < 0) {
+ ret = -errno;
+ if (!silent)
+ error("failed to open %s: %s", path,
+ strerror(-ret));
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;
- }
- }
+ ret = ioctl(fd, BTRFS_IOC_FS_INFO, &args);
+ if (ret < 0) {
+ ret = -errno;
+ goto out;
}
-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(
- 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)
u64 dev_cnt, int mixed, int ssd)
{
u64 allowed = 0;
+ u64 profile = metadata_profile | data_profile;
switch (dev_cnt) {
default:
case 2:
allowed |= BTRFS_BLOCK_GROUP_RAID0 | BTRFS_BLOCK_GROUP_RAID1 |
BTRFS_BLOCK_GROUP_RAID5;
- break;
case 1:
allowed |= BTRFS_BLOCK_GROUP_DUP;
}
- if (dev_cnt > 1 &&
- ((metadata_profile | data_profile) & BTRFS_BLOCK_GROUP_DUP)) {
- fprintf(stderr,
- "ERROR: DUP is not allowed when FS has multiple devices\n");
- return 1;
+ if (dev_cnt > 1 && profile & BTRFS_BLOCK_GROUP_DUP) {
+ warning("DUP is not recommended on filesystem with multiple devices");
}
if (metadata_profile & ~allowed) {
fprintf(stderr,
return 1;
}
+ if (dev_cnt == 3 && profile & BTRFS_BLOCK_GROUP_RAID6) {
+ warning("RAID6 is not recommended on filesystem with 3 devices only");
+ }
+ if (dev_cnt == 2 && profile & BTRFS_BLOCK_GROUP_RAID5) {
+ warning("RAID5 is not recommended on filesystem with 2 devices only");
+ }
warning_on(!mixed && (data_profile & BTRFS_BLOCK_GROUP_DUP) && ssd,
"DUP may not actually lead to 2 copies on the device, see manual page");
}
}
-/*
- * 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(char *file, int force_overwrite)
-{
- int ret, fd;
- struct stat st;
-
- ret = is_swap_device(file);
- if (ret < 0) {
- fprintf(stderr, "ERROR: checking status of %s: %s\n", file,
- strerror(-ret));
- return 1;
- }
- if (ret == 1) {
- fprintf(stderr, "ERROR: %s is a swap device\n", file);
- return 1;
- }
- if (!force_overwrite) {
- if (check_overwrite(file)) {
- fprintf(stderr, "Use the -f option to force overwrite.\n");
- return 1;
- }
- }
- ret = check_mounted(file);
- if (ret < 0) {
- fprintf(stderr, "ERROR: checking mount status of %s: %s\n",
- file, strerror(-ret));
- return 1;
- }
- if (ret == 1) {
- fprintf(stderr, "ERROR: %s is mounted\n", file);
- return 1;
- }
- /* check if the device is busy */
- fd = open(file, O_RDWR|O_EXCL);
- if (fd < 0) {
- fprintf(stderr, "ERROR: unable to open %s: %s\n", file,
- strerror(errno));
- return 1;
- }
- if (fstat(fd, &st)) {
- fprintf(stderr, "ERROR: unable to stat %s: %s\n", file,
- strerror(errno));
- close(fd);
- return 1;
- }
- if (!S_ISBLK(st.st_mode)) {
- fprintf(stderr, "ERROR: %s is not a block device\n", file);
- close(fd);
- return 1;
- }
- close(fd);
- return 0;
-}
-
-int btrfs_scan_lblkid(void)
+int btrfs_scan_devices(void)
{
int fd = -1;
int ret;
return 0;
if (blkid_get_cache(&cache, NULL) < 0) {
- printf("ERROR: lblkid cache get failed\n");
+ error("blkid cache get failed");
return 1;
}
blkid_probe_all(cache);
fd = open(path, O_RDONLY);
if (fd < 0) {
- printf("ERROR: could not open %s\n", path);
+ error("cannot open %s: %m", path);
continue;
}
ret = btrfs_scan_one_device(fd, path, &tmp_devices,
- &num_devices, BTRFS_SUPER_INFO_OFFSET, 0);
+ &num_devices, BTRFS_SUPER_INFO_OFFSET,
+ SBREAD_DEFAULT);
if (ret) {
- printf("ERROR: could not scan %s\n", path);
+ error("cannot scan %s: %s", path, strerror(-ret));
close (fd);
continue;
}
return 0;
}
-int is_vol_small(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
* or y.
*/
-int ask_user(char *question)
+int ask_user(const char *question)
{
char buf[30] = {0,};
char *saveptr = NULL;
}
/*
- * 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_ino_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) {
- fprintf(stderr, "ERROR: Failed to lookup root id - %s\n",
- strerror(errno));
- return ret;
- }
-
- *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 1;
}
-char* btrfs_group_type_str(u64 flag)
+const char* btrfs_group_type_str(u64 flag)
{
u64 mask = BTRFS_BLOCK_GROUP_TYPE_MASK |
BTRFS_SPACE_INFO_GLOBAL_RSV;
}
}
-char* btrfs_group_profile_str(u64 flag)
+const char* btrfs_group_profile_str(u64 flag)
{
switch (flag & BTRFS_BLOCK_GROUP_PROFILE_MASK) {
case 0:
}
}
-u64 disk_size(char *path)
+u64 disk_size(const char *path)
{
struct statfs sfs;
return sfs.f_bsize * sfs.f_blocks;
}
-u64 get_partition_size(char *dev)
+u64 get_partition_size(const char *dev)
{
u64 result;
int fd = open(dev, O_RDONLY);
return result;
}
+/*
+ * Check if the BTRFS_IOC_TREE_SEARCH_V2 ioctl is supported on a given
+ * filesystem, opened at fd
+ */
int btrfs_tree_search2_ioctl_supported(int fd)
{
struct btrfs_ioctl_search_args_v2 *args2;
int args2_size = 1024;
char args2_buf[args2_size];
int ret;
- static int v2_supported = -1;
-
- if (v2_supported != -1)
- return v2_supported;
args2 = (struct btrfs_ioctl_search_args_v2 *)args2_buf;
sk = &(args2->key);
args2->buf_size = args2_size - sizeof(struct btrfs_ioctl_search_args_v2);
ret = ioctl(fd, BTRFS_IOC_TREE_SEARCH_V2, args2);
if (ret == -EOPNOTSUPP)
- v2_supported = 0;
+ return 0;
else if (ret == 0)
- v2_supported = 1;
- else
- return ret;
-
- return v2_supported;
+ return 1;
+ return ret;
}
int btrfs_check_nodesize(u32 nodesize, u32 sectorsize, u64 features)
{
if (nodesize < sectorsize) {
- fprintf(stderr,
- "ERROR: Illegal nodesize %u (smaller than %u)\n",
- nodesize, sectorsize);
+ error("illegal nodesize %u (smaller than %u)",
+ nodesize, sectorsize);
return -1;
} else if (nodesize > BTRFS_MAX_METADATA_BLOCKSIZE) {
- fprintf(stderr,
- "ERROR: Illegal nodesize %u (larger than %u)\n",
+ error("illegal nodesize %u (larger than %u)",
nodesize, BTRFS_MAX_METADATA_BLOCKSIZE);
return -1;
} else if (nodesize & (sectorsize - 1)) {
- fprintf(stderr,
- "ERROR: Illegal nodesize %u (not aligned to %u)\n",
+ error("illegal nodesize %u (not aligned to %u)",
nodesize, sectorsize);
return -1;
} else if (features & BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS &&
nodesize != sectorsize) {
- fprintf(stderr,
- "ERROR: Illegal nodesize %u (not equal to %u for mixed block group)\n",
+ error("illegal nodesize %u (not equal to %u for mixed block group)",
nodesize, sectorsize);
return -1;
}
if (len >= PATH_MAX || len >= destlen)
return -ENAMETOOLONG;
- __strncpy__null(dest, src, destlen);
+ __strncpy_null(dest, src, destlen);
return 0;
}
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)
+int prefixcmp(const char *str, const char *prefix)
{
- 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);
- }
- }
+ 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;
-}
-
-char *subvol_strip_mountpoint(char *mnt, char *full_path)
+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(char *fullpath, struct root_info *get_ri)
+/* Set the seed manually */
+void init_rand_seed(u64 seed)
{
- u64 sv_id;
- int ret = 1;
- int fd = -1;
- int mntfd = -1;
- char *mnt = NULL;
- char *svpath = NULL;
- DIR *dirstream1 = NULL;
- DIR *dirstream2 = NULL;
+ int i;
- ret = test_issubvolume(fullpath);
- if (ret < 0)
- return ret;
- if (!ret) {
- error("not a subvolume: %s", fullpath);
- return 1;
+ /* only use the last 48 bits */
+ for (i = 0; i < 3; i++) {
+ rand_seed[i] = (unsigned short)(seed ^ (unsigned short)(-1));
+ seed >>= 16;
}
+ rand_seed_initlized = 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;
+static void __init_seed(void)
+{
+ struct timeval tv;
+ int ret;
+ int fd;
+
+ if(rand_seed_initlized)
+ return;
+ /* Use urandom as primary seed source. */
+ fd = open("/dev/urandom", O_RDONLY);
+ if (fd >= 0) {
+ ret = read(fd, rand_seed, sizeof(rand_seed));
+ close(fd);
+ if (ret < sizeof(rand_seed))
+ goto fallback;
+ } else {
+fallback:
+ /* Use time and pid as fallback seed */
+ warning("failed to read /dev/urandom, use time and pid as random seed");
+ gettimeofday(&tv, 0);
+ rand_seed[0] = getpid() ^ (tv.tv_sec & 0xFFFF);
+ rand_seed[1] = getppid() ^ (tv.tv_usec & 0xFFFF);
+ rand_seed[2] = (tv.tv_sec ^ tv.tv_usec) >> 16;
}
- ret = 1;
- svpath = subvol_strip_mountpoint(mnt, fullpath);
+ rand_seed_initlized = 1;
+}
- fd = btrfs_open_dir(fullpath, &dirstream1, 1);
- if (fd < 0)
- goto out;
+u32 rand_u32(void)
+{
+ __init_seed();
+ /*
+ * Don't use nrand48, its range is [0,2^31) The highest bit will alwasy
+ * be 0. Use jrand48 to include the highest bit.
+ */
+ return (u32)jrand48(rand_seed);
+}
- ret = btrfs_list_get_path_rootid(fd, &sv_id);
- if (ret) {
- error("can't get rootid for '%s'", fullpath);
- goto out;
- }
+/* Return random number in range [0, upper) */
+unsigned int rand_range(unsigned int upper)
+{
+ __init_seed();
+ /*
+ * Use the full 48bits to mod, which would be more uniformly
+ * distributed
+ */
+ return (unsigned int)(jrand48(rand_seed) % upper);
+}
- mntfd = btrfs_open_dir(mnt, &dirstream2, 1);
- if (mntfd < 0)
- goto out;
+int rand_int(void)
+{
+ return (int)(rand_u32());
+}
- if (sv_id == BTRFS_FS_TREE_OBJECTID) {
- ret = 2;
- /*
- * So that caller may decide if thats an error or just fine.
- */
- goto out;
- }
+u64 rand_u64(void)
+{
+ u64 ret = 0;
- memset(get_ri, 0, sizeof(*get_ri));
- get_ri->root_id = sv_id;
+ ret += rand_u32();
+ ret <<= 32;
+ ret += rand_u32();
+ return ret;
+}
- ret = btrfs_get_subvol(mntfd, get_ri);
- if (ret)
- error("can't find '%s': %d", svpath, ret);
+u16 rand_u16(void)
+{
+ return (u16)(rand_u32());
+}
-out:
- close_file_or_dir(mntfd, dirstream2);
- close_file_or_dir(mntfd, dirstream1);
- free(mnt);
+u8 rand_u8(void)
+{
+ return (u8)(rand_u32());
+}
- return ret;
+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