#include <stdlib.h>
/* #include <sys/dir.h> included via androidcompat.h */
#include <fcntl.h>
+#include <limits.h>
#include <unistd.h>
#include <getopt.h>
#include <uuid/uuid.h>
#include <ctype.h>
#include <blkid/blkid.h>
-#include <ftw.h>
#include "ctree.h"
#include "disk-io.h"
#include "volumes.h"
bytes_used = btrfs_super_bytes_used(fs_info->super_copy);
root->fs_info->system_allocs = 1;
+ /*
+ * First temporary system chunk must match the chunk layout
+ * created in make_btrfs().
+ */
ret = btrfs_make_block_group(trans, fs_info, bytes_used,
BTRFS_BLOCK_GROUP_SYSTEM,
- BTRFS_FIRST_CHUNK_TREE_OBJECTID,
- 0, BTRFS_MKFS_SYSTEM_GROUP_SIZE);
+ BTRFS_BLOCK_RESERVED_1M_FOR_SUPER,
+ BTRFS_MKFS_SYSTEM_GROUP_SIZE);
allocation->system += BTRFS_MKFS_SYSTEM_GROUP_SIZE;
if (ret)
return ret;
ret = btrfs_make_block_group(trans, fs_info, 0,
BTRFS_BLOCK_GROUP_METADATA |
BTRFS_BLOCK_GROUP_DATA,
- BTRFS_FIRST_CHUNK_TREE_OBJECTID,
chunk_start, chunk_size);
if (ret)
return ret;
return ret;
ret = btrfs_make_block_group(trans, fs_info, 0,
BTRFS_BLOCK_GROUP_METADATA,
- BTRFS_FIRST_CHUNK_TREE_OBJECTID,
chunk_start, chunk_size);
allocation->metadata += chunk_size;
if (ret)
return ret;
ret = btrfs_make_block_group(trans, fs_info, 0,
BTRFS_BLOCK_GROUP_DATA,
- BTRFS_FIRST_CHUNK_TREE_OBJECTID,
chunk_start, chunk_size);
allocation->data += chunk_size;
if (ret)
return ret;
ret = btrfs_make_block_group(trans, fs_info, 0,
- type, BTRFS_FIRST_CHUNK_TREE_OBJECTID,
- chunk_start, chunk_size);
+ type, chunk_start, chunk_size);
type &= BTRFS_BLOCK_GROUP_TYPE_MASK;
if (type == BTRFS_BLOCK_GROUP_DATA) {
struct btrfs_key location;
struct btrfs_root_item root_item;
struct extent_buffer *tmp;
+ u8 uuid[BTRFS_UUID_SIZE] = {0};
int ret;
ret = btrfs_copy_root(trans, root, root->node, &tmp, objectid);
btrfs_set_root_bytenr(&root_item, tmp->start);
btrfs_set_root_level(&root_item, btrfs_header_level(tmp));
btrfs_set_root_generation(&root_item, trans->transid);
+ /* clear uuid and o/ctime of source tree */
+ memcpy(root_item.uuid, uuid, BTRFS_UUID_SIZE);
+ btrfs_set_stack_timespec_sec(&root_item.otime, 0);
+ btrfs_set_stack_timespec_sec(&root_item.ctime, 0);
free_extent_buffer(tmp);
location.objectid = objectid;
printf(" creation:\n");
printf("\t-b|--byte-count SIZE set filesystem size to SIZE (on the first device)\n");
printf("\t-r|--rootdir DIR copy files from DIR to the image root directory\n");
+ printf("\t--shrink (with --rootdir) shrink the filled filesystem to minimal size\n");
printf("\t-K|--nodiscard do not perform whole device TRIM\n");
printf("\t-f|--force force overwrite of existing filesystem\n");
printf(" general:\n");
return strdup(input);
}
-static int create_chunks(struct btrfs_trans_handle *trans,
- struct btrfs_root *root, u64 num_of_meta_chunks,
- u64 size_of_data,
- struct mkfs_allocation *allocation)
-{
- struct btrfs_fs_info *fs_info = root->fs_info;
- u64 chunk_start;
- u64 chunk_size;
- u64 meta_type = BTRFS_BLOCK_GROUP_METADATA;
- u64 data_type = BTRFS_BLOCK_GROUP_DATA;
- u64 minimum_data_chunk_size = SZ_8M;
- u64 i;
- int ret;
-
- for (i = 0; i < num_of_meta_chunks; i++) {
- ret = btrfs_alloc_chunk(trans, fs_info,
- &chunk_start, &chunk_size, meta_type);
- if (ret)
- return ret;
- ret = btrfs_make_block_group(trans, fs_info, 0,
- meta_type, BTRFS_FIRST_CHUNK_TREE_OBJECTID,
- chunk_start, chunk_size);
- allocation->metadata += chunk_size;
- if (ret)
- return ret;
- set_extent_dirty(&root->fs_info->free_space_cache,
- chunk_start, chunk_start + chunk_size - 1);
- }
-
- if (size_of_data < minimum_data_chunk_size)
- size_of_data = minimum_data_chunk_size;
-
- ret = btrfs_alloc_data_chunk(trans, fs_info,
- &chunk_start, size_of_data, data_type, 0);
- if (ret)
- return ret;
- ret = btrfs_make_block_group(trans, fs_info, 0,
- data_type, BTRFS_FIRST_CHUNK_TREE_OBJECTID,
- chunk_start, size_of_data);
- allocation->data += size_of_data;
- if (ret)
- return ret;
- set_extent_dirty(&root->fs_info->free_space_cache,
- chunk_start, chunk_start + size_of_data - 1);
- return ret;
-}
-
-/*
- * This ignores symlinks with unreadable targets and subdirs that can't
- * be read. It's a best-effort to give a rough estimate of the size of
- * a subdir. It doesn't guarantee that prepopulating btrfs from this
- * tree won't still run out of space.
- */
-static u64 global_total_size;
-static u64 fs_block_size;
-static int ftw_add_entry_size(const char *fpath, const struct stat *st,
- int type)
-{
- if (type == FTW_F || type == FTW_D)
- global_total_size += round_up(st->st_size, fs_block_size);
-
- return 0;
-}
-
-static u64 size_sourcedir(const char *dir_name, u64 sectorsize,
- u64 *num_of_meta_chunks_ret, u64 *size_of_data_ret)
-{
- u64 dir_size = 0;
- u64 total_size = 0;
- int ret;
- u64 default_chunk_size = SZ_8M;
- u64 allocated_meta_size = SZ_8M;
- u64 allocated_total_size = 20 * SZ_1M; /* 20MB */
- u64 num_of_meta_chunks = 0;
- u64 num_of_data_chunks = 0;
- u64 num_of_allocated_meta_chunks =
- allocated_meta_size / default_chunk_size;
-
- global_total_size = 0;
- fs_block_size = sectorsize;
- ret = ftw(dir_name, ftw_add_entry_size, 10);
- dir_size = global_total_size;
- if (ret < 0) {
- error("ftw subdir walk of %s failed: %s", dir_name,
- strerror(errno));
- exit(1);
- }
-
- num_of_data_chunks = (dir_size + default_chunk_size - 1) /
- default_chunk_size;
-
- num_of_meta_chunks = (dir_size / 2) / default_chunk_size;
- if (((dir_size / 2) % default_chunk_size) != 0)
- num_of_meta_chunks++;
- if (num_of_meta_chunks <= num_of_allocated_meta_chunks)
- num_of_meta_chunks = 0;
- else
- num_of_meta_chunks -= num_of_allocated_meta_chunks;
-
- total_size = allocated_total_size +
- (num_of_data_chunks * default_chunk_size) +
- (num_of_meta_chunks * default_chunk_size);
-
- *num_of_meta_chunks_ret = num_of_meta_chunks;
- *size_of_data_ret = num_of_data_chunks * default_chunk_size;
- return total_size;
-}
-
static int zero_output_file(int out_fd, u64 size)
{
int loop_num;
return ret;
}
+/*
+ * Just update chunk allocation info, since --rootdir may allocate new
+ * chunks which is not updated in @allocation structure.
+ */
+static void update_chunk_allocation(struct btrfs_fs_info *fs_info,
+ struct mkfs_allocation *allocation)
+{
+ struct btrfs_block_group_cache *bg_cache;
+ const u64 mixed_flag = BTRFS_BLOCK_GROUP_DATA | BTRFS_BLOCK_GROUP_METADATA;
+ u64 search_start = 0;
+
+ allocation->mixed = 0;
+ allocation->data = 0;
+ allocation->metadata = 0;
+ allocation->system = 0;
+ while (1) {
+ bg_cache = btrfs_lookup_first_block_group(fs_info,
+ search_start);
+ if (!bg_cache)
+ break;
+ if ((bg_cache->flags & mixed_flag) == mixed_flag)
+ allocation->mixed += bg_cache->key.offset;
+ else if (bg_cache->flags & BTRFS_BLOCK_GROUP_DATA)
+ allocation->data += bg_cache->key.offset;
+ else if (bg_cache->flags & BTRFS_BLOCK_GROUP_METADATA)
+ allocation->metadata += bg_cache->key.offset;
+ else
+ allocation->system += bg_cache->key.offset;
+ search_start = bg_cache->key.objectid + bg_cache->key.offset;
+ }
+}
+
int main(int argc, char **argv)
{
char *file;
u32 stripesize = 4096;
int zero_end = 1;
int fd = -1;
- int ret;
+ int ret = 0;
int close_ret;
int i;
int mixed = 0;
int ssd = 0;
int force_overwrite = 0;
char *source_dir = NULL;
- int source_dir_set = 0;
- u64 num_of_meta_chunks = 0;
- u64 size_of_data = 0;
+ bool source_dir_set = false;
+ bool shrink_rootdir = false;
u64 source_dir_size = 0;
u64 min_dev_size;
+ u64 shrink_size;
int dev_cnt = 0;
int saved_optind;
char fs_uuid[BTRFS_UUID_UNPARSED_SIZE] = { 0 };
while(1) {
int c;
+ enum { GETOPT_VAL_SHRINK = 257 };
static const struct option long_options[] = {
{ "alloc-start", required_argument, NULL, 'A'},
{ "byte-count", required_argument, NULL, 'b' },
{ "features", required_argument, NULL, 'O' },
{ "uuid", required_argument, NULL, 'U' },
{ "quiet", 0, NULL, 'q' },
+ { "shrink", no_argument, NULL, GETOPT_VAL_SHRINK },
{ "help", no_argument, NULL, GETOPT_VAL_HELP },
{ NULL, 0, NULL, 0}
};
goto success;
case 'r':
source_dir = optarg;
- source_dir_set = 1;
+ source_dir_set = true;
break;
case 'U':
strncpy(fs_uuid, optarg,
case 'q':
verbose = 0;
break;
+ case GETOPT_VAL_SHRINK:
+ shrink_rootdir = true;
+ break;
case GETOPT_VAL_HELP:
default:
print_usage(c != GETOPT_VAL_HELP);
error("the option -r is limited to a single device");
goto error;
}
+ if (shrink_rootdir && !source_dir_set) {
+ error("the option --shrink must be used with --rootdir");
+ goto error;
+ }
if (*fs_uuid) {
uuid_t dummy_uuid;
while (dev_cnt-- > 0) {
file = argv[optind++];
- if (is_block_device(file) == 1)
+ if (source_dir_set && is_path_exist(file) == 0)
+ ret = 0;
+ else if (is_block_device(file) == 1)
ret = test_dev_for_mkfs(file, force_overwrite);
else
ret = test_status_for_mkfs(file, force_overwrite);
min_dev_size = btrfs_min_dev_size(nodesize, mixed, metadata_profile,
data_profile);
+ /*
+ * Enlarge the destination file or create a new one, using the size
+ * calculated from source dir.
+ *
+ * This must be done before minimal device size checks.
+ */
+ if (source_dir_set) {
+ int oflags = O_RDWR;
+ struct stat statbuf;
+
+ if (is_path_exist(file) == 0)
+ oflags |= O_CREAT;
+
+ fd = open(file, oflags, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP |
+ S_IROTH);
+ if (fd < 0) {
+ error("unable to open %s: %m", file);
+ goto error;
+ }
+
+ ret = fstat(fd, &statbuf);
+ if (ret < 0) {
+ error("unable to stat %s: %m", file);
+ ret = -errno;
+ goto error;
+ }
+
+ /*
+ * Block_count not specified, use file/device size first.
+ * Or we will always use source_dir_size calculated for mkfs.
+ */
+ if (!block_count)
+ block_count = btrfs_device_size(fd, &statbuf);
+ source_dir_size = btrfs_mkfs_size_dir(source_dir, sectorsize,
+ min_dev_size, metadata_profile, data_profile);
+ if (block_count < source_dir_size)
+ block_count = source_dir_size;
+ ret = zero_output_file(fd, block_count);
+ if (ret) {
+ error("unable to zero the output file");
+ close(fd);
+ goto error;
+ }
+ /* our "device" is the new image file */
+ dev_block_count = block_count;
+ close(fd);
+ }
/* Check device/block_count after the nodesize is determined */
if (block_count && block_count < min_dev_size) {
error("size %llu is too small to make a usable filesystem",
path = argv[i];
ret = test_minimum_size(path, min_dev_size);
if (ret < 0) {
- error("failed to check size for %s: %s",
- path, strerror(-ret));
+ error("failed to check size for %s: %m", path);
goto error;
}
if (ret > 0) {
dev_cnt--;
- if (!source_dir_set) {
- /*
- * open without O_EXCL so that the problem should not
- * occur by the following processing.
- * (btrfs_register_one_device() fails if O_EXCL is on)
- */
- fd = open(file, O_RDWR);
- if (fd < 0) {
- error("unable to open %s: %s", file, strerror(errno));
- goto error;
- }
- ret = btrfs_prepare_device(fd, file, &dev_block_count,
- block_count,
- (zero_end ? PREP_DEVICE_ZERO_END : 0) |
- (discard ? PREP_DEVICE_DISCARD : 0) |
- (verbose ? PREP_DEVICE_VERBOSE : 0));
- if (ret) {
- goto error;
- }
- if (block_count && block_count > dev_block_count) {
- error("%s is smaller than requested size, expected %llu, found %llu",
- file,
- (unsigned long long)block_count,
- (unsigned long long)dev_block_count);
- goto error;
- }
- } else {
- fd = open(file, O_CREAT | O_RDWR,
- S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH);
- if (fd < 0) {
- error("unable to open %s: %s", file, strerror(errno));
- goto error;
- }
-
- source_dir_size = size_sourcedir(source_dir, sectorsize,
- &num_of_meta_chunks, &size_of_data);
- if(block_count < source_dir_size)
- block_count = source_dir_size;
- ret = zero_output_file(fd, block_count);
- if (ret) {
- error("unable to zero the output file");
- goto error;
- }
- /* our "device" is the new image file */
- dev_block_count = block_count;
+ /*
+ * Open without O_EXCL so that the problem should not occur by the
+ * following operation in kernel:
+ * (btrfs_register_one_device() fails if O_EXCL is on)
+ */
+ fd = open(file, O_RDWR);
+ if (fd < 0) {
+ error("unable to open %s: %m", file);
+ goto error;
+ }
+ ret = btrfs_prepare_device(fd, file, &dev_block_count, block_count,
+ (zero_end ? PREP_DEVICE_ZERO_END : 0) |
+ (discard ? PREP_DEVICE_DISCARD : 0) |
+ (verbose ? PREP_DEVICE_VERBOSE : 0));
+ if (ret)
+ goto error;
+ if (block_count && block_count > dev_block_count) {
+ error("%s is smaller than requested size, expected %llu, found %llu",
+ file, (unsigned long long)block_count,
+ (unsigned long long)dev_block_count);
+ goto error;
}
/* To create the first block group and chunk 0 in make_btrfs */
}
fs_info = open_ctree_fs_info(file, 0, 0, 0,
- OPEN_CTREE_WRITES | OPEN_CTREE_FS_PARTIAL);
+ OPEN_CTREE_WRITES | OPEN_CTREE_TEMPORARY_SUPER);
if (!fs_info) {
error("open ctree failed");
goto error;
*/
fd = open(file, O_RDWR);
if (fd < 0) {
- error("unable to open %s: %s", file, strerror(errno));
+ error("unable to open %s: %m", file);
goto error;
}
ret = btrfs_device_already_in_root(root, fd,
}
raid_groups:
- if (!source_dir_set) {
- ret = create_raid_groups(trans, root, data_profile,
- metadata_profile, mixed, &allocation);
- if (ret) {
- error("unable to create raid groups: %d", ret);
- goto out;
- }
+ ret = create_raid_groups(trans, root, data_profile,
+ metadata_profile, mixed, &allocation);
+ if (ret) {
+ error("unable to create raid groups: %d", ret);
+ goto out;
}
ret = create_tree(trans, root, BTRFS_DATA_RELOC_TREE_OBJECTID);
goto out;
}
+ ret = create_tree(trans, root, BTRFS_UUID_TREE_OBJECTID);
+ if (ret)
+ warning(
+ "unable to create uuid tree, will be created after mount: %d", ret);
+
ret = btrfs_commit_transaction(trans, root);
if (ret) {
error("unable to commit transaction: %d", ret);
goto out;
}
- if (source_dir_set) {
- trans = btrfs_start_transaction(root, 1);
- BUG_ON(IS_ERR(trans));
- ret = create_chunks(trans, root,
- num_of_meta_chunks, size_of_data,
- &allocation);
- if (ret) {
- error("unable to create chunks: %d", ret);
- goto out;
- }
- ret = btrfs_commit_transaction(trans, root);
- if (ret) {
- error("transaction commit failed: %d", ret);
- goto out;
- }
+ ret = cleanup_temp_chunks(fs_info, &allocation, data_profile,
+ metadata_profile, metadata_profile);
+ if (ret < 0) {
+ error("failed to cleanup temporary chunks: %d", ret);
+ goto out;
+ }
+ if (source_dir_set) {
ret = btrfs_mkfs_fill_dir(source_dir, root, verbose);
if (ret) {
error("error wihle filling filesystem: %d", ret);
goto out;
}
- }
- ret = cleanup_temp_chunks(fs_info, &allocation, data_profile,
- metadata_profile, metadata_profile);
- if (ret < 0) {
- error("failed to cleanup temporary chunks: %d", ret);
- goto out;
+ if (shrink_rootdir) {
+ ret = btrfs_mkfs_shrink_fs(fs_info, &shrink_size,
+ shrink_rootdir);
+ if (ret < 0) {
+ error("error while shrinking filesystem: %d",
+ ret);
+ goto out;
+ }
+ }
}
if (verbose) {
char features_buf[64];
+ update_chunk_allocation(fs_info, &allocation);
printf("Label: %s\n", label);
printf("UUID: %s\n", mkfs_cfg.fs_uuid);
printf("Node size: %u\n", nodesize);
}
}
+ if (!ret && close_ret) {
+ ret = close_ret;
+ error("failed to close ctree, the filesystem may be inconsistent: %d",
+ ret);
+ }
+
btrfs_close_all_devices();
free(label);
projects / platform / upstream / btrfs-progs.git / blobdiff