int main(int ac, char **av)
{
struct btrfs_root *root;
struct btrfs_trans_handle *trans;
int ret;
if (ac != 2)
print_usage();
radix_tree_init();
if((ret = check_mounted(av[1])) < 0) {
fprintf(stderr, "Could not check mount status: %s\n", strerror(-ret));
goto out;
} else if(ret) {
fprintf(stderr, "%s is currently mounted. Aborting.\n", av[1]);
ret = -EBUSY;
goto out;
}
root = open_ctree(av[1], 0, OPEN_CTREE_WRITES);
if (root == NULL)
return 1;
trans = btrfs_start_transaction(root, 1);
btrfs_set_super_log_root(root->fs_info->super_copy, 0);
btrfs_set_super_log_root_level(root->fs_info->super_copy, 0);
btrfs_commit_transaction(trans, root);
close_ctree(root);
out:
return !!ret;
}
static int cmd_rescue_zero_log(int argc, char **argv)
{
struct btrfs_root *root;
struct btrfs_trans_handle *trans;
struct btrfs_super_block *sb;
char *devname;
int ret;
clean_args_no_options(argc, argv, cmd_rescue_zero_log_usage);
if (check_argc_exact(argc, 2))
usage(cmd_rescue_zero_log_usage);
devname = argv[optind];
ret = check_mounted(devname);
if (ret < 0) {
errno = -ret;
error("could not check mount status: %m");
goto out;
} else if (ret) {
error("%s is currently mounted", devname);
ret = -EBUSY;
goto out;
}
root = open_ctree(devname, 0, OPEN_CTREE_WRITES | OPEN_CTREE_PARTIAL);
if (!root) {
error("could not open ctree");
return 1;
}
sb = root->fs_info->super_copy;
printf("Clearing log on %s, previous log_root %llu, level %u\n",
devname,
(unsigned long long)btrfs_super_log_root(sb),
(unsigned)btrfs_super_log_root_level(sb));
trans = btrfs_start_transaction(root, 1);
BUG_ON(IS_ERR(trans));
btrfs_set_super_log_root(sb, 0);
btrfs_set_super_log_root_level(sb, 0);
btrfs_commit_transaction(trans, root);
close_ctree(root);
out:
return !!ret;
}
int get_label_unmounted(char *dev)
{
struct btrfs_root *root;
/* Open the super_block at the default location
* and as read-only.
*/
root = open_ctree(dev, 0, 0);
if(!root)
return -1;
fprintf(stdout, "%s\n", root->fs_info->super_copy.label);
/* Now we close it since we are done. */
close_ctree(root);
return 0;
}
int main(int ac, char **av)
{
struct btrfs_root *root;
struct btrfs_trans_handle *trans;
struct btrfs_super_block *sb;
int ret;
set_argv0(av);
if (check_argc_exact(ac, 2))
print_usage();
radix_tree_init();
printf("WARNING: this utility is deprecated, please use 'btrfs rescue zero-log'\n\n");
if ((ret = check_mounted(av[1])) < 0) {
fprintf(stderr, "ERROR: could not check mount status: %s\n", strerror(-ret));
goto out;
} else if (ret) {
fprintf(stderr, "ERROR: %s is currently mounted\n", av[1]);
ret = -EBUSY;
goto out;
}
root = open_ctree(av[1], 0, OPEN_CTREE_WRITES | OPEN_CTREE_PARTIAL);
if (!root) {
fprintf(stderr, "ERROR: cannot open ctree\n");
return 1;
}
sb = root->fs_info->super_copy;
printf("Clearing log on %s, previous log_root %llu, level %u\n",
av[1],
(unsigned long long)btrfs_super_log_root(sb),
(unsigned)btrfs_super_log_root_level(sb));
trans = btrfs_start_transaction(root, 1);
btrfs_set_super_log_root(root->fs_info->super_copy, 0);
btrfs_set_super_log_root_level(root->fs_info->super_copy, 0);
btrfs_commit_transaction(trans, root);
close_ctree(root);
out:
return !!ret;
}
static void change_label_unmounted(char *dev, char *nLabel)
{
struct btrfs_root *root;
struct btrfs_trans_handle *trans;
/* Open the super_block at the default location
* and as read-write.
*/
root = open_ctree(dev, 0, 1);
if (!root) /* errors are printed by open_ctree() */
return;
trans = btrfs_start_transaction(root, 1);
strncpy(root->fs_info->super_copy.label, nLabel, BTRFS_LABEL_SIZE);
root->fs_info->super_copy.label[BTRFS_LABEL_SIZE-1] = 0;
btrfs_commit_transaction(trans, root);
/* Now we close it since we are done. */
close_ctree(root);
}
int main(int argc, char *argv[])
{
struct btrfs_root *root;
int success = 0;
int extrefs_flag = 0;
int seeding_flag = 0;
int seeding_value = 0;
int ret;
while(1) {
int c = getopt(argc, argv, "S:r");
if (c < 0)
break;
switch(c) {
case 'S':
seeding_flag = 1;
seeding_value = atoi(optarg);
break;
case 'r':
extrefs_flag = 1;
break;
default:
print_usage();
return 1;
}
}
argc = argc - optind;
device = argv[optind];
if (argc != 1) {
print_usage();
return 1;
}
if (check_mounted(device)) {
fprintf(stderr, "%s is mounted\n", device);
return 1;
}
root = open_ctree(device, 0, 1);
if (!root) {
fprintf(stderr, "Open ctree failed\n");
return 1;
}
if (seeding_flag) {
ret = update_seeding_flag(root, seeding_value);
if (!ret)
success++;
}
if (extrefs_flag) {
enable_extrefs_flag(root);
success++;
}
if (success > 0) {
ret = 0;
} else {
root->fs_info->readonly = 1;
ret = 1;
}
close_ctree(root);
return ret;
}
int main(int ac, char **av)
{
struct cache_tree root_cache;
struct btrfs_root *root;
struct extent_buffer *eb;
char *dev;
char *output_file = NULL;
u64 logical = 0;
int ret = 0;
int option_index = 0;
int copy = 0;
u64 bytes = 0;
int out_fd = 0;
int err;
while(1) {
int c;
c = getopt_long(ac, av, "l:c:o:b:", long_options,
&option_index);
if (c < 0)
break;
switch(c) {
case 'l':
logical = atoll(optarg);
if (logical == 0) {
fprintf(stderr,
"invalid extent number\n");
print_usage();
}
break;
case 'c':
copy = atoi(optarg);
if (copy == 0) {
fprintf(stderr,
"invalid copy number\n");
print_usage();
}
break;
case 'b':
bytes = atoll(optarg);
if (bytes == 0) {
fprintf(stderr,
"invalid byte count\n");
print_usage();
}
break;
case 'o':
output_file = strdup(optarg);
break;
default:
print_usage();
}
}
ac = ac - optind;
if (ac == 0)
print_usage();
if (logical == 0)
print_usage();
if (copy < 0)
print_usage();
dev = av[optind];
radix_tree_init();
cache_tree_init(&root_cache);
root = open_ctree(dev, 0, 0);
if (!root) {
fprintf(stderr, "Open ctree failed\n");
exit(1);
}
info_file = stdout;
if (output_file) {
if (strcmp(output_file, "-") == 0) {
out_fd = 1;
info_file = stderr;
} else {
out_fd = open(output_file, O_RDWR | O_CREAT, 0600);
if (out_fd < 0)
goto close;
err = ftruncate(out_fd, 0);
if (err) {
close(out_fd);
goto close;
}
info_file = stdout;
}
}
if (bytes == 0)
bytes = root->sectorsize;
bytes = (bytes + root->sectorsize - 1) / root->sectorsize;
bytes *= root->sectorsize;
while (bytes > 0) {
eb = debug_read_block(root, logical, root->sectorsize, copy);
if (eb && output_file) {
err = write(out_fd, eb->data, eb->len);
if (err < 0 || err != eb->len) {
fprintf(stderr, "output file write failed\n");
goto out_close_fd;
}
}
free_extent_buffer(eb);
logical += root->sectorsize;
bytes -= root->sectorsize;
}
out_close_fd:
if (output_file && out_fd != 1)
close(out_fd);
close:
close_ctree(root);
return ret;
}
int main(int ac, char **av)
{
char *file;
struct btrfs_root *root;
struct btrfs_trans_handle *trans;
char *label = NULL;
char *first_file;
u64 block_count = 0;
u64 dev_block_count = 0;
u64 blocks[7];
u64 alloc_start = 0;
u64 metadata_profile = 0;
u64 data_profile = 0;
u32 leafsize = sysconf(_SC_PAGESIZE);
u32 sectorsize = 4096;
u32 nodesize = leafsize;
u32 stripesize = 4096;
int zero_end = 1;
int option_index = 0;
int fd;
int ret;
int i;
int mixed = 0;
int data_profile_opt = 0;
int metadata_profile_opt = 0;
int discard = 1;
int ssd = 0;
int force_overwrite = 0;
char *source_dir = NULL;
int source_dir_set = 0;
u64 num_of_meta_chunks = 0;
u64 size_of_data = 0;
u64 source_dir_size = 0;
int dev_cnt = 0;
int saved_optind;
char estr[100];
u64 features = 0;
while(1) {
int c;
c = getopt_long(ac, av, "A:b:fl:n:s:m:d:L:O:r:VMK",
long_options, &option_index);
if (c < 0)
break;
switch(c) {
case 'A':
alloc_start = parse_size(optarg);
break;
case 'f':
force_overwrite = 1;
break;
case 'd':
data_profile = parse_profile(optarg);
data_profile_opt = 1;
break;
case 'l':
case 'n':
nodesize = parse_size(optarg);
leafsize = parse_size(optarg);
break;
case 'L':
label = parse_label(optarg);
break;
case 'm':
metadata_profile = parse_profile(optarg);
metadata_profile_opt = 1;
break;
case 'M':
mixed = 1;
break;
case 'O': {
char *orig = strdup(optarg);
char *tmp = orig;
tmp = parse_fs_features(tmp, &features);
if (tmp) {
fprintf(stderr,
"Unrecognized filesystem feature '%s'\n",
tmp);
free(orig);
exit(1);
}
free(orig);
if (features & BTRFS_FEATURE_LIST_ALL) {
list_all_fs_features();
exit(0);
}
break;
}
case 's':
sectorsize = parse_size(optarg);
break;
case 'b':
block_count = parse_size(optarg);
if (block_count <= 1024*1024*1024) {
printf("SMALL VOLUME: forcing mixed "
"metadata/data groups\n");
mixed = 1;
}
zero_end = 0;
break;
case 'V':
print_version();
break;
case 'r':
source_dir = optarg;
source_dir_set = 1;
break;
case 'K':
discard = 0;
break;
default:
print_usage();
}
}
sectorsize = max(sectorsize, (u32)sysconf(_SC_PAGESIZE));
if (check_leaf_or_node_size(leafsize, sectorsize))
exit(1);
if (check_leaf_or_node_size(nodesize, sectorsize))
exit(1);
saved_optind = optind;
dev_cnt = ac - optind;
if (dev_cnt == 0)
print_usage();
if (source_dir_set && dev_cnt > 1) {
fprintf(stderr,
"The -r option is limited to a single device\n");
exit(1);
}
while (dev_cnt-- > 0) {
file = av[optind++];
if (is_block_device(file))
if (test_dev_for_mkfs(file, force_overwrite, estr)) {
fprintf(stderr, "Error: %s", estr);
exit(1);
}
}
optind = saved_optind;
dev_cnt = ac - optind;
file = av[optind++];
ssd = is_ssd(file);
if (is_vol_small(file)) {
printf("SMALL VOLUME: forcing mixed metadata/data groups\n");
mixed = 1;
if (metadata_profile != data_profile) {
if (metadata_profile_opt || data_profile_opt) {
fprintf(stderr,
"With mixed block groups data and metadata profiles must be the same\n");
exit(1);
}
}
}
/*
* Set default profiles according to number of added devices.
* For mixed groups defaults are single/single.
*/
if (!mixed) {
if (!metadata_profile_opt) {
if (dev_cnt == 1 && ssd)
printf("Detected a SSD, turning off metadata "
"duplication. Mkfs with -m dup if you want to "
"force metadata duplication.\n");
metadata_profile = (dev_cnt > 1) ?
BTRFS_BLOCK_GROUP_RAID1 : (ssd) ?
0: BTRFS_BLOCK_GROUP_DUP;
}
if (!data_profile_opt) {
data_profile = (dev_cnt > 1) ?
BTRFS_BLOCK_GROUP_RAID0 : 0; /* raid0 or single */
}
} else {
metadata_profile = 0;
data_profile = 0;
}
ret = test_num_disk_vs_raid(metadata_profile, data_profile,
dev_cnt, mixed, estr);
if (ret) {
fprintf(stderr, "Error: %s\n", estr);
exit(1);
}
/* if we are here that means all devs are good to btrfsify */
printf("\nWARNING! - %s IS EXPERIMENTAL\n", BTRFS_BUILD_VERSION);
printf("WARNING! - see http://btrfs.wiki.kernel.org before using\n\n");
dev_cnt--;
if (!source_dir_set) {
/*
* open without O_EXCL so that the problem should not
* occur by the following processing.
* (btrfs_register_one_device() fails if O_EXCL is on)
*/
fd = open(file, O_RDWR);
if (fd < 0) {
fprintf(stderr, "unable to open %s: %s\n", file,
strerror(errno));
exit(1);
}
first_file = file;
ret = btrfs_prepare_device(fd, file, zero_end, &dev_block_count,
block_count, &mixed, discard);
if (block_count && block_count > dev_block_count) {
fprintf(stderr, "%s is smaller than requested size\n", file);
exit(1);
}
} else {
fd = open_target(file);
if (fd < 0) {
fprintf(stderr, "unable to open the %s\n", file);
exit(1);
}
first_file = file;
source_dir_size = size_sourcedir(source_dir, sectorsize,
&num_of_meta_chunks, &size_of_data);
if(block_count < source_dir_size)
block_count = source_dir_size;
ret = zero_output_file(fd, block_count, sectorsize);
if (ret) {
fprintf(stderr, "unable to zero the output file\n");
exit(1);
}
/* our "device" is the new image file */
dev_block_count = block_count;
}
/* To create the first block group and chunk 0 in make_btrfs */
if (dev_block_count < BTRFS_MKFS_SYSTEM_GROUP_SIZE) {
fprintf(stderr, "device is too small to make filesystem\n");
exit(1);
}
blocks[0] = BTRFS_SUPER_INFO_OFFSET;
for (i = 1; i < 7; i++) {
blocks[i] = BTRFS_SUPER_INFO_OFFSET + 1024 * 1024 +
leafsize * i;
}
/*
* FS features that can be set by other means than -O
* just set the bit here
*/
if (mixed)
features |= BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS;
if ((data_profile | metadata_profile) &
(BTRFS_BLOCK_GROUP_RAID5 | BTRFS_BLOCK_GROUP_RAID6)) {
features |= BTRFS_FEATURE_INCOMPAT_RAID56;
}
process_fs_features(features);
ret = make_btrfs(fd, file, label, blocks, dev_block_count,
nodesize, leafsize,
sectorsize, stripesize, features);
if (ret) {
fprintf(stderr, "error during mkfs: %s\n", strerror(-ret));
exit(1);
}
root = open_ctree(file, 0, OPEN_CTREE_WRITES);
if (!root) {
fprintf(stderr, "Open ctree failed\n");
close(fd);
exit(1);
}
root->fs_info->alloc_start = alloc_start;
ret = make_root_dir(root, mixed);
if (ret) {
fprintf(stderr, "failed to setup the root directory\n");
exit(1);
}
trans = btrfs_start_transaction(root, 1);
if (dev_cnt == 0)
goto raid_groups;
btrfs_register_one_device(file);
zero_end = 1;
while (dev_cnt-- > 0) {
int old_mixed = mixed;
file = av[optind++];
/*
* open without O_EXCL so that the problem should not
* occur by the following processing.
* (btrfs_register_one_device() fails if O_EXCL is on)
*/
fd = open(file, O_RDWR);
if (fd < 0) {
fprintf(stderr, "unable to open %s: %s\n", file,
strerror(errno));
exit(1);
}
ret = btrfs_device_already_in_root(root, fd,
BTRFS_SUPER_INFO_OFFSET);
if (ret) {
fprintf(stderr, "skipping duplicate device %s in FS\n",
file);
close(fd);
continue;
}
ret = btrfs_prepare_device(fd, file, zero_end, &dev_block_count,
block_count, &mixed, discard);
mixed = old_mixed;
BUG_ON(ret);
ret = btrfs_add_to_fsid(trans, root, fd, file, dev_block_count,
sectorsize, sectorsize, sectorsize);
BUG_ON(ret);
btrfs_register_one_device(file);
}
raid_groups:
if (!source_dir_set) {
ret = create_raid_groups(trans, root, data_profile,
data_profile_opt, metadata_profile,
metadata_profile_opt, mixed, ssd);
BUG_ON(ret);
}
ret = create_data_reloc_tree(trans, root);
BUG_ON(ret);
printf("fs created label %s on %s\n\tnodesize %u leafsize %u "
"sectorsize %u size %s\n",
label, first_file, nodesize, leafsize, sectorsize,
pretty_size(btrfs_super_total_bytes(root->fs_info->super_copy)));
printf("%s\n", BTRFS_BUILD_VERSION);
btrfs_commit_transaction(trans, root);
if (source_dir_set) {
trans = btrfs_start_transaction(root, 1);
ret = create_chunks(trans, root,
num_of_meta_chunks, size_of_data);
BUG_ON(ret);
btrfs_commit_transaction(trans, root);
ret = make_image(source_dir, root, fd);
BUG_ON(ret);
}
ret = close_ctree(root);
BUG_ON(ret);
free(label);
return 0;
}
int main(int ac, char **av)
{
struct cache_tree root_cache;
struct btrfs_root *root;
char *dev;
char *output_file = NULL;
u64 copy = 0;
u64 logical = 0;
u64 bytes = 0;
u64 cur_logical = 0;
u64 cur_len = 0;
int out_fd = -1;
int found = 0;
int ret = 0;
while(1) {
int c;
static const struct option long_options[] = {
/* { "byte-count", 1, NULL, 'b' }, */
{ "logical", required_argument, NULL, 'l' },
{ "copy", required_argument, NULL, 'c' },
{ "output", required_argument, NULL, 'o' },
{ "bytes", required_argument, NULL, 'b' },
{ NULL, 0, NULL, 0}
};
c = getopt_long(ac, av, "l:c:o:b:", long_options, NULL);
if (c < 0)
break;
switch(c) {
case 'l':
logical = arg_strtou64(optarg);
break;
case 'c':
copy = arg_strtou64(optarg);
break;
case 'b':
bytes = arg_strtou64(optarg);
break;
case 'o':
output_file = strdup(optarg);
break;
default:
print_usage();
}
}
set_argv0(av);
ac = ac - optind;
if (check_argc_min(ac, 1))
print_usage();
if (logical == 0)
print_usage();
dev = av[optind];
radix_tree_init();
cache_tree_init(&root_cache);
root = open_ctree(dev, 0, 0);
if (!root) {
fprintf(stderr, "Open ctree failed\n");
exit(1);
}
info_file = stdout;
if (output_file) {
if (strcmp(output_file, "-") == 0) {
out_fd = 1;
info_file = stderr;
} else {
out_fd = open(output_file, O_RDWR | O_CREAT, 0600);
if (out_fd < 0)
goto close;
ret = ftruncate(out_fd, 0);
if (ret) {
ret = 1;
close(out_fd);
goto close;
}
info_file = stdout;
}
}
if (bytes == 0)
bytes = root->nodesize;
cur_logical = logical;
cur_len = bytes;
/* First find the nearest extent */
ret = map_one_extent(root->fs_info, &cur_logical, &cur_len, 0);
if (ret < 0) {
fprintf(stderr, "Failed to find extent at [%llu,%llu): %s\n",
cur_logical, cur_logical + cur_len, strerror(-ret));
goto out_close_fd;
}
/*
* Normally, search backward should be OK, but for special case like
* given logical is quite small where no extents are before it,
* we need to search forward.
*/
if (ret > 0) {
ret = map_one_extent(root->fs_info, &cur_logical, &cur_len, 1);
if (ret < 0) {
fprintf(stderr,
"Failed to find extent at [%llu,%llu): %s\n",
cur_logical, cur_logical + cur_len,
strerror(-ret));
goto out_close_fd;
}
if (ret > 0) {
fprintf(stderr,
"Failed to find any extent at [%llu,%llu)\n",
cur_logical, cur_logical + cur_len);
goto out_close_fd;
}
}
while (cur_logical + cur_len >= logical && cur_logical < logical +
bytes) {
u64 real_logical;
u64 real_len;
found = 1;
ret = map_one_extent(root->fs_info, &cur_logical, &cur_len, 1);
if (ret < 0)
goto out_close_fd;
if (ret > 0)
break;
real_logical = max(logical, cur_logical);
real_len = min(logical + bytes, cur_logical + cur_len) -
real_logical;
ret = print_mapping_info(root->fs_info, real_logical, real_len);
if (ret < 0)
goto out_close_fd;
if (output_file && out_fd != -1) {
ret = write_extent_content(root->fs_info, out_fd,
real_logical, real_len, copy);
if (ret < 0)
goto out_close_fd;
}
cur_logical += cur_len;
}
if (!found) {
fprintf(stderr, "No extent found at range [%llu,%llu)\n",
logical, logical + bytes);
}
out_close_fd:
if (output_file && out_fd != 1)
close(out_fd);
close:
close_ctree(root);
if (ret < 0)
ret = 1;
return ret;
}
int main(int argc, char *argv[])
{
struct btrfs_root *root;
unsigned ctree_flags = OPEN_CTREE_WRITES;
int success = 0;
int total = 0;
int seeding_flag = 0;
u64 seeding_value = 0;
int random_fsid = 0;
char *new_fsid_str = NULL;
int ret;
u64 super_flags = 0;
while(1) {
static const struct option long_options[] = {
{ "help", no_argument, NULL, GETOPT_VAL_HELP},
{ NULL, 0, NULL, 0 }
};
int c = getopt_long(argc, argv, "S:rxfuU:n", long_options, NULL);
if (c < 0)
break;
switch(c) {
case 'S':
seeding_flag = 1;
seeding_value = arg_strtou64(optarg);
break;
case 'r':
super_flags |= BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF;
break;
case 'x':
super_flags |= BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA;
break;
case 'n':
super_flags |= BTRFS_FEATURE_INCOMPAT_NO_HOLES;
break;
case 'f':
force = 1;
break;
case 'U':
ctree_flags |= OPEN_CTREE_IGNORE_FSID_MISMATCH;
new_fsid_str = optarg;
break;
case 'u':
ctree_flags |= OPEN_CTREE_IGNORE_FSID_MISMATCH;
random_fsid = 1;
break;
case GETOPT_VAL_HELP:
default:
print_usage();
return c != GETOPT_VAL_HELP;
}
}
set_argv0(argv);
device = argv[optind];
if (check_argc_exact(argc - optind, 1)) {
print_usage();
return 1;
}
if (random_fsid && new_fsid_str) {
error("random fsid can't be used with specified fsid");
return 1;
}
if (!super_flags && !seeding_flag && !(random_fsid || new_fsid_str)) {
error("at least one option should be specified");
print_usage();
return 1;
}
if (new_fsid_str) {
uuid_t tmp;
ret = uuid_parse(new_fsid_str, tmp);
if (ret < 0) {
error("could not parse UUID: %s", new_fsid_str);
return 1;
}
if (!test_uuid_unique(new_fsid_str)) {
error("fsid %s is not unique", new_fsid_str);
return 1;
}
}
ret = check_mounted(device);
if (ret < 0) {
error("could not check mount status of %s: %s", device,
strerror(-ret));
return 1;
} else if (ret) {
error("%s is mounted", device);
return 1;
}
root = open_ctree(device, 0, ctree_flags);
if (!root) {
error("open ctree failed");
return 1;
}
if (seeding_flag) {
if (!seeding_value && !force) {
warning(
"this is dangerous, clearing the seeding flag may cause the derived device not to be mountable!");
ret = ask_user("We are going to clear the seeding flag, are you sure?");
if (!ret) {
fprintf(stderr, "Clear seeding flag canceled\n");
ret = 1;
goto out;
}
}
ret = update_seeding_flag(root, seeding_value);
if (!ret)
success++;
total++;
}
if (super_flags) {
ret = set_super_incompat_flags(root, super_flags);
if (!ret)
success++;
total++;
}
if (random_fsid || new_fsid_str) {
if (!force) {
warning(
"it's highly recommended to run 'btrfs check' before this operation");
warning(
"also canceling running UUID change progress may cause corruption");
ret = ask_user("We are going to change UUID, are your sure?");
if (!ret) {
fprintf(stderr, "UUID change canceled\n");
ret = 1;
goto out;
}
}
ret = change_uuid(root->fs_info, new_fsid_str);
if (!ret)
success++;
total++;
}
if (success == total) {
ret = 0;
} else {
root->fs_info->readonly = 1;
ret = 1;
error("btrfstune failed");
}
out:
close_ctree(root);
btrfs_close_all_devices();
return ret;
}
int main(int ac, char **av) {
struct btrfs_key ins;
struct btrfs_key last = { (u64)-1, 0, 0};
char *buf;
int i;
int num;
int ret;
int run_size = 300000;
int max_key = 100000000;
int tree_size = 2;
struct btrfs_path path;
struct btrfs_root *root;
struct btrfs_trans_handle *trans;
buf = malloc(512);
memset(buf, 0, 512);
radix_tree_init();
root = open_ctree(av[1], BTRFS_SUPER_INFO_OFFSET, OPEN_CTREE_WRITES);
if (!root) {
fprintf(stderr, "Open ctree failed\n");
exit(1);
}
trans = btrfs_start_transaction(root, 1);
srand(55);
btrfs_set_key_type(&ins, BTRFS_STRING_ITEM_KEY);
for (i = 0; i < run_size; i++) {
num = next_key(i, max_key);
// num = i;
sprintf(buf, "string-%d", num);
if (i % 10000 == 0)
fprintf(stderr, "insert %d:%d\n", num, i);
ins.objectid = num;
ins.offset = 0;
ret = btrfs_insert_item(trans, root, &ins, buf, 512);
if (!ret)
tree_size++;
if (i == run_size - 5) {
btrfs_commit_transaction(trans, root);
trans = btrfs_start_transaction(root, 1);
}
}
btrfs_commit_transaction(trans, root);
close_ctree(root);
exit(1);
root = open_ctree(av[1], BTRFS_SUPER_INFO_OFFSET, OPEN_CTREE_WRITES);
if (!root) {
fprintf(stderr, "Open ctree failed\n");
exit(1);
}
printf("starting search\n");
srand(55);
for (i = 0; i < run_size; i++) {
num = next_key(i, max_key);
ins.objectid = num;
btrfs_init_path(&path);
if (i % 10000 == 0)
fprintf(stderr, "search %d:%d\n", num, i);
ret = btrfs_search_slot(NULL, root, &ins, &path, 0, 0);
if (ret) {
btrfs_print_tree(root, root->node, 1);
printf("unable to find %d\n", num);
exit(1);
}
btrfs_release_path(&path);
}
close_ctree(root);
root = open_ctree(av[1], BTRFS_SUPER_INFO_OFFSET, OPEN_CTREE_WRITES);
if (!root) {
fprintf(stderr, "Open ctree failed\n");
exit(1);
}
printf("node %p level %d total ptrs %d free spc %lu\n", root->node,
btrfs_header_level(root->node),
btrfs_header_nritems(root->node),
(unsigned long)BTRFS_NODEPTRS_PER_BLOCK(root) -
btrfs_header_nritems(root->node));
printf("all searches good, deleting some items\n");
i = 0;
srand(55);
trans = btrfs_start_transaction(root, 1);
for (i = 0 ; i < run_size/4; i++) {
num = next_key(i, max_key);
ins.objectid = num;
btrfs_init_path(&path);
ret = btrfs_search_slot(trans, root, &ins, &path, -1, 1);
if (!ret) {
if (i % 10000 == 0)
fprintf(stderr, "del %d:%d\n", num, i);
ret = btrfs_del_item(trans, root, &path);
if (ret != 0)
BUG();
tree_size--;
}
btrfs_release_path(&path);
}
btrfs_commit_transaction(trans, root);
close_ctree(root);
root = open_ctree(av[1], BTRFS_SUPER_INFO_OFFSET, OPEN_CTREE_WRITES);
if (!root) {
fprintf(stderr, "Open ctree failed\n");
exit(1);
}
trans = btrfs_start_transaction(root, 1);
srand(128);
for (i = 0; i < run_size; i++) {
num = next_key(i, max_key);
sprintf(buf, "string-%d", num);
ins.objectid = num;
if (i % 10000 == 0)
fprintf(stderr, "insert %d:%d\n", num, i);
ret = btrfs_insert_item(trans, root, &ins, buf, 512);
if (!ret)
tree_size++;
}
btrfs_commit_transaction(trans, root);
close_ctree(root);
root = open_ctree(av[1], BTRFS_SUPER_INFO_OFFSET, OPEN_CTREE_WRITES);
if (!root) {
fprintf(stderr, "Open ctree failed\n");
exit(1);
}
srand(128);
printf("starting search2\n");
for (i = 0; i < run_size; i++) {
num = next_key(i, max_key);
ins.objectid = num;
btrfs_init_path(&path);
if (i % 10000 == 0)
fprintf(stderr, "search %d:%d\n", num, i);
ret = btrfs_search_slot(NULL, root, &ins, &path, 0, 0);
if (ret) {
btrfs_print_tree(root, root->node, 1);
printf("unable to find %d\n", num);
exit(1);
}
btrfs_release_path(&path);
}
printf("starting big long delete run\n");
trans = btrfs_start_transaction(root, 1);
while(root->node && btrfs_header_nritems(root->node) > 0) {
struct extent_buffer *leaf;
int slot;
ins.objectid = (u64)-1;
btrfs_init_path(&path);
ret = btrfs_search_slot(trans, root, &ins, &path, -1, 1);
if (ret == 0)
BUG();
leaf = path.nodes[0];
slot = path.slots[0];
if (slot != btrfs_header_nritems(leaf))
BUG();
while(path.slots[0] > 0) {
path.slots[0] -= 1;
slot = path.slots[0];
leaf = path.nodes[0];
btrfs_item_key_to_cpu(leaf, &last, slot);
if (tree_size % 10000 == 0)
printf("big del %d:%d\n", tree_size, i);
ret = btrfs_del_item(trans, root, &path);
if (ret != 0) {
printf("del_item returned %d\n", ret);
BUG();
}
tree_size--;
}
btrfs_release_path(&path);
}
/*
printf("previous tree:\n");
btrfs_print_tree(root, root->commit_root);
printf("map before commit\n");
btrfs_print_tree(root->extent_root, root->extent_root->node);
*/
btrfs_commit_transaction(trans, root);
printf("tree size is now %d\n", tree_size);
printf("root %p commit root %p\n", root->node, root->commit_root);
btrfs_print_tree(root, root->node, 1);
close_ctree(root);
return 0;
}
static int btrfs_fill_super(struct super_block *sb,
struct btrfs_fs_devices *fs_devices,
void *data, int silent)
{
struct inode *inode;
struct dentry *root_dentry;
struct btrfs_super_block *disk_super;
struct btrfs_root *tree_root;
struct btrfs_inode *bi;
int err;
sb->s_maxbytes = MAX_LFS_FILESIZE;
sb->s_magic = BTRFS_SUPER_MAGIC;
sb->s_op = &btrfs_super_ops;
sb->s_export_op = &btrfs_export_ops;
sb->s_xattr = btrfs_xattr_handlers;
sb->s_time_gran = 1;
sb->s_flags |= MS_POSIXACL;
tree_root = open_ctree(sb, fs_devices, (char *)data);
if (IS_ERR(tree_root)) {
printk("btrfs: open_ctree failed\n");
return PTR_ERR(tree_root);
}
sb->s_fs_info = tree_root;
disk_super = &tree_root->fs_info->super_copy;
inode = btrfs_iget_locked(sb, BTRFS_FIRST_FREE_OBJECTID,
tree_root->fs_info->fs_root);
bi = BTRFS_I(inode);
bi->location.objectid = inode->i_ino;
bi->location.offset = 0;
bi->root = tree_root->fs_info->fs_root;
btrfs_set_key_type(&bi->location, BTRFS_INODE_ITEM_KEY);
if (!inode) {
err = -ENOMEM;
goto fail_close;
}
if (inode->i_state & I_NEW) {
btrfs_read_locked_inode(inode);
unlock_new_inode(inode);
}
root_dentry = d_alloc_root(inode);
if (!root_dentry) {
iput(inode);
err = -ENOMEM;
goto fail_close;
}
#if 0
/* this does the super kobj at the same time */
err = btrfs_sysfs_add_super(tree_root->fs_info);
if (err)
goto fail_close;
#endif
sb->s_root = root_dentry;
save_mount_options(sb, data);
sb->cleancache_poolid = cleancache_init_fs(PAGE_SIZE);
return 0;
fail_close:
close_ctree(tree_root);
return err;
}
int main(int ac, char **av)
{
struct btrfs_root *root;
int ret;
u64 num = 0;
u64 bytenr = 0;
while(1) {
int c;
c = getopt(ac, av, "s:");
if (c < 0)
break;
switch(c) {
case 's':
num = arg_strtou64(optarg);
if (num >= BTRFS_SUPER_MIRROR_MAX) {
fprintf(stderr,
"ERROR: super mirror should be less than: %d\n",
BTRFS_SUPER_MIRROR_MAX);
exit(1);
}
bytenr = btrfs_sb_offset(((int)num));
break;
default:
print_usage();
}
}
set_argv0(av);
ac = ac - optind;
if (check_argc_exact(ac, 1))
print_usage();
if (bytenr == 0) {
fprintf(stderr, "Please select the super copy with -s\n");
print_usage();
}
radix_tree_init();
if((ret = check_mounted(av[optind])) < 0) {
fprintf(stderr, "Could not check mount status: %s\n", strerror(-ret));
return ret;
} else if(ret) {
fprintf(stderr, "%s is currently mounted. Aborting.\n", av[optind]);
return -EBUSY;
}
root = open_ctree(av[optind], bytenr, 1);
if (!root) {
fprintf(stderr, "Open ctree failed\n");
return 1;
}
/* make the super writing code think we've read the first super */
root->fs_info->super_bytenr = BTRFS_SUPER_INFO_OFFSET;
ret = write_all_supers(root);
/* we don't close the ctree or anything, because we don't want a real
* transaction commit. We just want the super copy we pulled off the
* disk to overwrite all the other copies
*/
printf("using SB copy %llu, bytenr %llu\n", (unsigned long long)num,
(unsigned long long)bytenr);
close_ctree(root);
btrfs_close_all_devices();
return ret;
}