int main(int argc, char **argv)
{
int ret;
if (argc > 1 && !strcmp(argv[1], "--help"))
usage(cmd_inspect_tree_stats_usage);
ret = cmd_inspect_tree_stats(argc, argv);
btrfs_close_all_devices();
return ret;
}
int main(int argc, char **argv)
{
const struct cmd_struct *cmd;
const char *bname;
int ret;
if ((bname = strrchr(argv[0], '/')) != NULL)
bname++;
else
bname = argv[0];
if (!strcmp(bname, "btrfsck")) {
argv[0] = "check";
} else {
argc--;
argv++;
check_options(argc, argv);
if (argc > 0) {
if (!prefixcmp(argv[0], "--"))
argv[0] += 2;
} else {
usage_command_group_short(&btrfs_cmd_group);
exit(1);
}
}
cmd = parse_command_token(argv[0], &btrfs_cmd_group);
handle_help_options_next_level(cmd, argc, argv);
crc32c_optimization_init();
fixup_argv0(argv, cmd->token);
ret = cmd->fn(argc, argv);
btrfs_close_all_devices();
exit(ret);
}
int main(int ac, char **av)
{
struct btrfs_root *root;
struct btrfs_fs_info *info;
struct btrfs_path path;
struct btrfs_key key;
struct btrfs_root_item ri;
struct extent_buffer *leaf;
struct btrfs_disk_key disk_key;
struct btrfs_key found_key;
char uuidbuf[BTRFS_UUID_UNPARSED_SIZE];
int ret;
int slot;
int extent_only = 0;
int device_only = 0;
int uuid_tree_only = 0;
int roots_only = 0;
int root_backups = 0;
u64 block_only = 0;
struct btrfs_root *tree_root_scan;
u64 tree_id = 0;
radix_tree_init();
while(1) {
int c;
static const struct option long_options[] = {
{ "help", no_argument, NULL, GETOPT_VAL_HELP},
{ NULL, 0, NULL, 0 }
};
c = getopt_long(ac, av, "deb:rRut:", long_options, NULL);
if (c < 0)
break;
switch(c) {
case 'e':
extent_only = 1;
break;
case 'd':
device_only = 1;
break;
case 'r':
roots_only = 1;
break;
case 'u':
uuid_tree_only = 1;
break;
case 'R':
roots_only = 1;
root_backups = 1;
break;
case 'b':
block_only = arg_strtou64(optarg);
break;
case 't':
tree_id = arg_strtou64(optarg);
break;
case GETOPT_VAL_HELP:
default:
print_usage(c != GETOPT_VAL_HELP);
}
}
set_argv0(av);
ac = ac - optind;
if (check_argc_exact(ac, 1))
print_usage(1);
ret = check_arg_type(av[optind]);
if (ret != BTRFS_ARG_BLKDEV && ret != BTRFS_ARG_REG) {
fprintf(stderr, "'%s' is not a block device or regular file\n",
av[optind]);
exit(1);
}
info = open_ctree_fs_info(av[optind], 0, 0, OPEN_CTREE_PARTIAL);
if (!info) {
fprintf(stderr, "unable to open %s\n", av[optind]);
exit(1);
}
root = info->fs_root;
if (!root) {
fprintf(stderr, "unable to open %s\n", av[optind]);
exit(1);
}
if (block_only) {
leaf = read_tree_block(root,
block_only,
root->leafsize, 0);
if (extent_buffer_uptodate(leaf) &&
btrfs_header_level(leaf) != 0) {
free_extent_buffer(leaf);
leaf = NULL;
}
if (!leaf) {
leaf = read_tree_block(root,
block_only,
root->nodesize, 0);
}
if (!extent_buffer_uptodate(leaf)) {
fprintf(stderr, "failed to read %llu\n",
(unsigned long long)block_only);
goto close_root;
}
btrfs_print_tree(root, leaf, 0);
free_extent_buffer(leaf);
goto close_root;
}
if (!(extent_only || uuid_tree_only || tree_id)) {
if (roots_only) {
printf("root tree: %llu level %d\n",
(unsigned long long)info->tree_root->node->start,
btrfs_header_level(info->tree_root->node));
printf("chunk tree: %llu level %d\n",
(unsigned long long)info->chunk_root->node->start,
btrfs_header_level(info->chunk_root->node));
} else {
if (info->tree_root->node) {
printf("root tree\n");
btrfs_print_tree(info->tree_root,
info->tree_root->node, 1);
}
if (info->chunk_root->node) {
printf("chunk tree\n");
btrfs_print_tree(info->chunk_root,
info->chunk_root->node, 1);
}
}
}
tree_root_scan = info->tree_root;
btrfs_init_path(&path);
again:
if (!extent_buffer_uptodate(tree_root_scan->node))
goto no_node;
/*
* Tree's that are not pointed by the tree of tree roots
*/
if (tree_id && tree_id == BTRFS_ROOT_TREE_OBJECTID) {
if (!info->tree_root->node) {
error("cannot print root tree, invalid pointer");
goto no_node;
}
printf("root tree\n");
btrfs_print_tree(info->tree_root, info->tree_root->node, 1);
goto no_node;
}
if (tree_id && tree_id == BTRFS_CHUNK_TREE_OBJECTID) {
if (!info->chunk_root->node) {
error("cannot print chunk tree, invalid pointer");
goto no_node;
}
printf("chunk tree\n");
btrfs_print_tree(info->chunk_root, info->chunk_root->node, 1);
goto no_node;
}
key.offset = 0;
key.objectid = 0;
btrfs_set_key_type(&key, BTRFS_ROOT_ITEM_KEY);
ret = btrfs_search_slot(NULL, tree_root_scan, &key, &path, 0, 0);
BUG_ON(ret < 0);
while(1) {
leaf = path.nodes[0];
slot = path.slots[0];
if (slot >= btrfs_header_nritems(leaf)) {
ret = btrfs_next_leaf(tree_root_scan, &path);
if (ret != 0)
break;
leaf = path.nodes[0];
slot = path.slots[0];
}
btrfs_item_key(leaf, &disk_key, path.slots[0]);
btrfs_disk_key_to_cpu(&found_key, &disk_key);
if (btrfs_key_type(&found_key) == BTRFS_ROOT_ITEM_KEY) {
unsigned long offset;
struct extent_buffer *buf;
int skip = extent_only | device_only | uuid_tree_only;
offset = btrfs_item_ptr_offset(leaf, slot);
read_extent_buffer(leaf, &ri, offset, sizeof(ri));
buf = read_tree_block(tree_root_scan,
btrfs_root_bytenr(&ri),
btrfs_level_size(tree_root_scan,
btrfs_root_level(&ri)),
0);
if (!extent_buffer_uptodate(buf))
goto next;
if (tree_id && found_key.objectid != tree_id) {
free_extent_buffer(buf);
goto next;
}
switch(found_key.objectid) {
case BTRFS_ROOT_TREE_OBJECTID:
if (!skip)
printf("root");
break;
case BTRFS_EXTENT_TREE_OBJECTID:
if (!device_only && !uuid_tree_only)
skip = 0;
if (!skip)
printf("extent");
break;
case BTRFS_CHUNK_TREE_OBJECTID:
if (!skip) {
printf("chunk");
}
break;
case BTRFS_DEV_TREE_OBJECTID:
if (!uuid_tree_only)
skip = 0;
if (!skip)
printf("device");
break;
case BTRFS_FS_TREE_OBJECTID:
if (!skip) {
printf("fs");
}
break;
case BTRFS_ROOT_TREE_DIR_OBJECTID:
skip = 0;
printf("directory");
break;
case BTRFS_CSUM_TREE_OBJECTID:
if (!skip) {
printf("checksum");
}
break;
case BTRFS_ORPHAN_OBJECTID:
if (!skip) {
printf("orphan");
}
break;
case BTRFS_TREE_LOG_OBJECTID:
if (!skip) {
printf("log");
}
break;
case BTRFS_TREE_LOG_FIXUP_OBJECTID:
if (!skip) {
printf("log fixup");
}
break;
case BTRFS_TREE_RELOC_OBJECTID:
if (!skip) {
printf("reloc");
}
break;
case BTRFS_DATA_RELOC_TREE_OBJECTID:
if (!skip) {
printf("data reloc");
}
break;
case BTRFS_EXTENT_CSUM_OBJECTID:
if (!skip) {
printf("extent checksum");
}
break;
case BTRFS_QUOTA_TREE_OBJECTID:
if (!skip) {
printf("quota");
}
break;
case BTRFS_UUID_TREE_OBJECTID:
if (!extent_only && !device_only)
skip = 0;
if (!skip)
printf("uuid");
break;
case BTRFS_FREE_SPACE_TREE_OBJECTID:
if (!skip)
printf("free space");
break;
case BTRFS_MULTIPLE_OBJECTIDS:
if (!skip) {
printf("multiple");
}
break;
default:
if (!skip) {
printf("file");
}
}
if (extent_only && !skip) {
print_extents(tree_root_scan, buf);
} else if (!skip) {
printf(" tree ");
btrfs_print_key(&disk_key);
if (roots_only) {
printf(" %llu level %d\n",
(unsigned long long)buf->start,
btrfs_header_level(buf));
} else {
printf(" \n");
btrfs_print_tree(tree_root_scan, buf, 1);
}
}
free_extent_buffer(buf);
}
next:
path.slots[0]++;
}
no_node:
btrfs_release_path(&path);
if (tree_root_scan == info->tree_root &&
info->log_root_tree) {
tree_root_scan = info->log_root_tree;
goto again;
}
if (extent_only || device_only || uuid_tree_only)
goto close_root;
if (root_backups)
print_old_roots(info->super_copy);
printf("total bytes %llu\n",
(unsigned long long)btrfs_super_total_bytes(info->super_copy));
printf("bytes used %llu\n",
(unsigned long long)btrfs_super_bytes_used(info->super_copy));
uuidbuf[BTRFS_UUID_UNPARSED_SIZE - 1] = '\0';
uuid_unparse(info->super_copy->fsid, uuidbuf);
printf("uuid %s\n", uuidbuf);
printf("%s\n", PACKAGE_STRING);
close_root:
ret = close_ctree(root);
btrfs_close_all_devices();
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 argc, char **argv)
{
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(argc, argv, "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(argv);
if (check_argc_min(argc - optind, 1))
print_usage();
if (logical == 0)
print_usage();
dev = argv[optind];
radix_tree_init();
cache_tree_init(&root_cache);
root = open_ctree(dev, 0, 0);
if (!root) {
fprintf(stderr, "Open ctree failed\n");
free(output_file);
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;
/* check again if there is overlap. */
if (cur_logical + cur_len < logical ||
cur_logical >= logical + bytes)
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:
free(output_file);
close_ctree(root);
if (ret < 0)
ret = 1;
btrfs_close_all_devices();
return ret;
}
static int dev_replace_handle_sigint(int fd)
{
struct sigaction sa = {
.sa_handler = fd == -1 ? SIG_DFL : dev_replace_sigint_handler
};
dev_replace_cancel_fd = fd;
return sigaction(SIGINT, &sa, NULL);
}
static const char *const cmd_replace_start_usage[] = {
"btrfs replace start [-Bfr] <srcdev>|<devid> <targetdev> <mount_point>",
"Replace device of a btrfs filesystem.",
"On a live filesystem, duplicate the data to the target device which",
"is currently stored on the source device. If the source device is not",
"available anymore, or if the -r option is set, the data is built",
"only using the RAID redundancy mechanisms. After completion of the",
"operation, the source device is removed from the filesystem.",
"If the <srcdev> is a numerical value, it is assumed to be the device id",
"of the filesystem which is mounted at <mount_point>, otherwise it is",
"the path to the source device. If the source device is disconnected,",
"from the system, you have to use the <devid> parameter format.",
"The <targetdev> needs to be same size or larger than the <srcdev>.",
"",
"-r only read from <srcdev> if no other zero-defect mirror exists",
" (enable this if your drive has lots of read errors, the access",
" would be very slow)",
"-f force using and overwriting <targetdev> even if it looks like",
" containing a valid btrfs filesystem. A valid filesystem is",
" assumed if a btrfs superblock is found which contains a",
" correct checksum. Devices which are currently mounted are",
" never allowed to be used as the <targetdev>",
"-B do not background",
NULL
};
static int cmd_replace_start(int argc, char **argv)
{
struct btrfs_ioctl_dev_replace_args start_args = {0};
struct btrfs_ioctl_dev_replace_args status_args = {0};
int ret;
int i;
int c;
int fdmnt = -1;
int fddstdev = -1;
char *path;
char *srcdev;
char *dstdev = NULL;
int avoid_reading_from_srcdev = 0;
int force_using_targetdev = 0;
u64 dstdev_block_count;
int do_not_background = 0;
int mixed = 0;
DIR *dirstream = NULL;
u64 srcdev_size;
u64 dstdev_size;
while ((c = getopt(argc, argv, "Brf")) != -1) {
switch (c) {
case 'B':
do_not_background = 1;
break;
case 'r':
avoid_reading_from_srcdev = 1;
break;
case 'f':
force_using_targetdev = 1;
break;
case '?':
default:
usage(cmd_replace_start_usage);
}
}
start_args.start.cont_reading_from_srcdev_mode =
avoid_reading_from_srcdev ?
BTRFS_IOCTL_DEV_REPLACE_CONT_READING_FROM_SRCDEV_MODE_AVOID :
BTRFS_IOCTL_DEV_REPLACE_CONT_READING_FROM_SRCDEV_MODE_ALWAYS;
if (check_argc_exact(argc - optind, 3))
usage(cmd_replace_start_usage);
path = argv[optind + 2];
fdmnt = open_path_or_dev_mnt(path, &dirstream);
if (fdmnt < 0) {
if (errno == EINVAL)
fprintf(stderr,
"ERROR: '%s' is not a mounted btrfs device\n",
path);
else
fprintf(stderr, "ERROR: can't access '%s': %s\n",
path, strerror(errno));
goto leave_with_error;
}
/* check for possible errors before backgrounding */
status_args.cmd = BTRFS_IOCTL_DEV_REPLACE_CMD_STATUS;
status_args.result = BTRFS_IOCTL_DEV_REPLACE_RESULT_NO_RESULT;
ret = ioctl(fdmnt, BTRFS_IOC_DEV_REPLACE, &status_args);
if (ret) {
fprintf(stderr,
"ERROR: ioctl(DEV_REPLACE_STATUS) failed on \"%s\": %s",
path, strerror(errno));
if (status_args.result != BTRFS_IOCTL_DEV_REPLACE_RESULT_NO_RESULT)
fprintf(stderr, ", %s\n",
replace_dev_result2string(status_args.result));
else
fprintf(stderr, "\n");
goto leave_with_error;
}
if (status_args.result != BTRFS_IOCTL_DEV_REPLACE_RESULT_NO_ERROR) {
fprintf(stderr,
"ERROR: ioctl(DEV_REPLACE_STATUS) on \"%s\" returns error: %s\n",
path, replace_dev_result2string(status_args.result));
goto leave_with_error;
}
if (status_args.status.replace_state ==
BTRFS_IOCTL_DEV_REPLACE_STATE_STARTED) {
fprintf(stderr,
"ERROR: btrfs replace on \"%s\" already started!\n",
path);
goto leave_with_error;
}
srcdev = argv[optind];
dstdev = canonicalize_path(argv[optind + 1]);
if (!dstdev) {
fprintf(stderr,
"ERROR: Could not canonicalize path '%s': %s\n",
argv[optind + 1], strerror(errno));
goto leave_with_error;
}
if (is_numerical(srcdev)) {
struct btrfs_ioctl_fs_info_args fi_args;
struct btrfs_ioctl_dev_info_args *di_args = NULL;
start_args.start.srcdevid = arg_strtou64(srcdev);
ret = get_fs_info(path, &fi_args, &di_args);
if (ret) {
fprintf(stderr, "ERROR: getting dev info for devstats failed: "
"%s\n", strerror(-ret));
free(di_args);
goto leave_with_error;
}
if (!fi_args.num_devices) {
fprintf(stderr, "ERROR: no devices found\n");
free(di_args);
goto leave_with_error;
}
for (i = 0; i < fi_args.num_devices; i++)
if (start_args.start.srcdevid == di_args[i].devid)
break;
srcdev_size = di_args[i].total_bytes;
free(di_args);
if (i == fi_args.num_devices) {
fprintf(stderr, "Error: '%s' is not a valid devid for filesystem '%s'\n",
srcdev, path);
goto leave_with_error;
}
} else if (is_block_device(srcdev) > 0) {
strncpy((char *)start_args.start.srcdev_name, srcdev,
BTRFS_DEVICE_PATH_NAME_MAX);
start_args.start.srcdevid = 0;
srcdev_size = get_partition_size(srcdev);
} else {
fprintf(stderr, "ERROR: source device must be a block device or a devid\n");
goto leave_with_error;
}
ret = test_dev_for_mkfs(dstdev, force_using_targetdev);
if (ret)
goto leave_with_error;
dstdev_size = get_partition_size(dstdev);
if (srcdev_size > dstdev_size) {
fprintf(stderr, "ERROR: target device smaller than source device (required %llu bytes)\n",
srcdev_size);
goto leave_with_error;
}
fddstdev = open(dstdev, O_RDWR);
if (fddstdev < 0) {
fprintf(stderr, "Unable to open %s\n", dstdev);
goto leave_with_error;
}
strncpy((char *)start_args.start.tgtdev_name, dstdev,
BTRFS_DEVICE_PATH_NAME_MAX);
ret = btrfs_prepare_device(fddstdev, dstdev, 1, &dstdev_block_count, 0,
&mixed, 0);
if (ret)
goto leave_with_error;
close(fddstdev);
fddstdev = -1;
free(dstdev);
dstdev = NULL;
dev_replace_handle_sigint(fdmnt);
if (!do_not_background) {
if (daemon(0, 0) < 0) {
fprintf(stderr, "ERROR, backgrounding failed: %s\n",
strerror(errno));
goto leave_with_error;
}
}
start_args.cmd = BTRFS_IOCTL_DEV_REPLACE_CMD_START;
start_args.result = BTRFS_IOCTL_DEV_REPLACE_RESULT_NO_RESULT;
ret = ioctl(fdmnt, BTRFS_IOC_DEV_REPLACE, &start_args);
if (do_not_background) {
if (ret) {
fprintf(stderr,
"ERROR: ioctl(DEV_REPLACE_START) failed on \"%s\": %s",
path, strerror(errno));
if (start_args.result != BTRFS_IOCTL_DEV_REPLACE_RESULT_NO_RESULT)
fprintf(stderr, ", %s\n",
replace_dev_result2string(start_args.result));
else
fprintf(stderr, "\n");
if (errno == EOPNOTSUPP)
fprintf(stderr,
"WARNING: dev_replace does not yet handle RAID5/6\n");
goto leave_with_error;
}
if (start_args.result !=
BTRFS_IOCTL_DEV_REPLACE_RESULT_NO_ERROR) {
fprintf(stderr,
"ERROR: ioctl(DEV_REPLACE_START) on \"%s\" returns error: %s\n",
path,
replace_dev_result2string(start_args.result));
goto leave_with_error;
}
}
close_file_or_dir(fdmnt, dirstream);
btrfs_close_all_devices();
return 0;
leave_with_error:
if (dstdev)
free(dstdev);
if (fdmnt != -1)
close(fdmnt);
if (fddstdev != -1)
close(fddstdev);
btrfs_close_all_devices();
return 1;
}
static const char *const cmd_replace_status_usage[] = {
"btrfs replace status [-1] <mount_point>",
"Print status and progress information of a running device replace",
"operation",
"",
"-1 print once instead of print continuously until the replace",
" operation finishes (or is canceled)",
NULL
};
static int cmd_replace_status(int argc, char **argv)
{
int fd;
int e;
int c;
char *path;
int once = 0;
int ret;
DIR *dirstream = NULL;
while ((c = getopt(argc, argv, "1")) != -1) {
switch (c) {
case '1':
once = 1;
break;
case '?':
default:
usage(cmd_replace_status_usage);
}
}
if (check_argc_exact(argc - optind, 1))
usage(cmd_replace_status_usage);
path = argv[optind];
fd = open_file_or_dir(path, &dirstream);
e = errno;
if (fd < 0) {
fprintf(stderr, "ERROR: can't access \"%s\": %s\n",
path, strerror(e));
return 1;
}
ret = print_replace_status(fd, path, once);
close_file_or_dir(fd, dirstream);
return !!ret;
}
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;
}
int main(int argc, char **argv)
{
struct btrfs_fs_info *fs_info;
struct btrfs_find_root_filter filter = {0};
struct cache_tree result;
struct cache_extent *found;
int ret;
/* Default to search root tree */
filter.objectid = BTRFS_ROOT_TREE_OBJECTID;
filter.match_gen = (u64)-1;
filter.match_level = (u8)-1;
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, "al:o:g:", long_options, NULL);
if (c < 0)
break;
switch (c) {
case 'a':
filter.search_all = 1;
break;
case 'o':
filter.objectid = arg_strtou64(optarg);
break;
case 'g':
filter.generation = arg_strtou64(optarg);
break;
case 'l':
filter.level = arg_strtou64(optarg);
break;
case GETOPT_VAL_HELP:
default:
find_root_usage();
exit(c != GETOPT_VAL_HELP);
}
}
set_argv0(argv);
if (check_argc_min(argc - optind, 1)) {
find_root_usage();
exit(1);
}
fs_info = open_ctree_fs_info(argv[optind], 0, 0, 0,
OPEN_CTREE_CHUNK_ROOT_ONLY |
OPEN_CTREE_IGNORE_CHUNK_TREE_ERROR);
if (!fs_info) {
error("open ctree failed");
exit(1);
}
cache_tree_init(&result);
get_root_gen_and_level(filter.objectid, fs_info,
&filter.match_gen, &filter.match_level);
ret = btrfs_find_root_search(fs_info, &filter, &result, &found);
if (ret < 0) {
fprintf(stderr, "Fail to search the tree root: %s\n",
strerror(-ret));
goto out;
}
if (ret > 0) {
printf("Found tree root at %llu gen %llu level %u\n",
found->start, filter.match_gen, filter.match_level);
ret = 0;
}
print_find_root_result(&result, &filter);
out:
btrfs_find_root_free(&result);
close_ctree_fs_info(fs_info);
btrfs_close_all_devices();
return ret;
}
