int cmd_inspect_dump_tree(int argc, char **argv)
{
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;
while (1) {
int c;
static const struct option long_options[] = {
{ "extents", no_argument, NULL, 'e'},
{ "device", no_argument, NULL, 'd'},
{ "roots", no_argument, NULL, 'r'},
{ "backups", no_argument, NULL, 'R'},
{ "uuid", no_argument, NULL, 'u'},
{ "block", required_argument, NULL, 'b'},
{ "tree", required_argument, NULL, 't'},
{ NULL, 0, NULL, 0 }
};
c = getopt_long(argc, argv, "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':
if (string_is_numerical(optarg)) {
tree_id = arg_strtou64(optarg);
} else {
const char *end = NULL;
tree_id = treeid_from_string(optarg, &end);
if (*end) {
error("unexpected tree id suffix of '%s': %s\n",
optarg, end);
exit(1);
}
}
if (!tree_id) {
error("unrecognized tree id: %s\n",
optarg);
exit(1);
}
break;
default:
usage(cmd_inspect_dump_tree_usage);
}
}
if (check_argc_exact(argc - optind, 1))
usage(cmd_inspect_dump_tree_usage);
ret = check_arg_type(argv[optind]);
if (ret != BTRFS_ARG_BLKDEV && ret != BTRFS_ARG_REG) {
error("not a block device or regular file: %s", argv[optind]);
goto out;
}
printf("%s\n", PACKAGE_STRING);
info = open_ctree_fs_info(argv[optind], 0, 0, 0, OPEN_CTREE_PARTIAL);
if (!info) {
error("unable to open %s", argv[optind]);
goto out;
}
root = info->fs_root;
if (!root) {
error("unable to open %s", argv[optind]);
goto out;
}
if (block_only) {
leaf = read_tree_block(root,
block_only,
root->nodesize, 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)) {
error("failed to read %llu",
(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),
tree_root_scan->nodesize,
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) {
printf(" tree ");
btrfs_print_key(&disk_key);
printf("\n");
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);
close_root:
ret = close_ctree(root);
out:
return !!ret;
}
static int _cmd_device_remove(int argc, char **argv,
const char * const *usagestr)
{
char *mntpnt;
int i, fdmnt, ret = 0;
DIR *dirstream = NULL;
clean_args_no_options(argc, argv, usagestr);
if (check_argc_min(argc - optind, 2))
usage(usagestr);
mntpnt = argv[argc - 1];
fdmnt = btrfs_open_dir(mntpnt, &dirstream, 1);
if (fdmnt < 0)
return 1;
for(i = optind; i < argc - 1; i++) {
struct btrfs_ioctl_vol_args arg;
struct btrfs_ioctl_vol_args_v2 argv2 = {0};
int is_devid = 0;
int res;
if (string_is_numerical(argv[i])) {
argv2.devid = arg_strtou64(argv[i]);
argv2.flags = BTRFS_DEVICE_SPEC_BY_ID;
is_devid = 1;
} else if (is_block_device(argv[i]) == 1 ||
strcmp(argv[i], "missing") == 0) {
strncpy_null(argv2.name, argv[i]);
} else {
error("not a block device: %s", argv[i]);
ret++;
continue;
}
/*
* Positive values are from BTRFS_ERROR_DEV_*,
* otherwise it's a generic error, one of errnos
*/
res = ioctl(fdmnt, BTRFS_IOC_RM_DEV_V2, &argv2);
/*
* If BTRFS_IOC_RM_DEV_V2 is not supported we get ENOTTY and if
* argv2.flags includes a flag which kernel doesn't understand then
* we shall get EOPNOTSUPP
*/
if (res < 0 && (errno == ENOTTY || errno == EOPNOTSUPP)) {
if (is_devid) {
error("device delete by id failed: %m");
ret++;
continue;
}
memset(&arg, 0, sizeof(arg));
strncpy_null(arg.name, argv[i]);
res = ioctl(fdmnt, BTRFS_IOC_RM_DEV, &arg);
}
if (res) {
const char *msg;
if (res > 0)
msg = btrfs_err_str(res);
else
msg = strerror(errno);
if (is_devid) {
error("error removing devid %llu: %s",
(unsigned long long)argv2.devid, msg);
} else {
error("error removing device '%s': %s",
argv[i], msg);
}
ret++;
}
}
close_file_or_dir(fdmnt, dirstream);
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;
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, 1);
if (fdmnt < 0)
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 < 0) {
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) {
error("ioctl(DEV_REPLACE_STATUS) on '%s' returns error: %s",
path, replace_dev_result2string(status_args.result));
goto leave_with_error;
}
if (status_args.status.replace_state ==
BTRFS_IOCTL_DEV_REPLACE_STATE_STARTED) {
error("device replace on '%s' already started", path);
goto leave_with_error;
}
srcdev = argv[optind];
dstdev = canonicalize_path(argv[optind + 1]);
if (!dstdev) {
error("cannot canonicalize path '%s': %s",
argv[optind + 1], strerror(errno));
goto leave_with_error;
}
if (string_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) {
error("failed to get device info: %s", strerror(-ret));
free(di_args);
goto leave_with_error;
}
if (!fi_args.num_devices) {
error("no devices found");
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) {
error("'%s' is not a valid devid for filesystem '%s'",
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 {
error("source device must be a block device or a devid");
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) {
error("target device smaller than source device (required %llu bytes)",
srcdev_size);
goto leave_with_error;
}
fddstdev = open(dstdev, O_RDWR);
if (fddstdev < 0) {
error("unable to open %s: %s", dstdev, strerror(errno));
goto leave_with_error;
}
strncpy((char *)start_args.start.tgtdev_name, dstdev,
BTRFS_DEVICE_PATH_NAME_MAX);
ret = btrfs_prepare_device(fddstdev, dstdev, &dstdev_block_count, 0,
PREP_DEVICE_ZERO_END | PREP_DEVICE_VERBOSE);
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) {
error("backgrounding failed: %s", 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 < 0) {
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)
warning("device replace of RAID5/6 not supported with this kernel");
goto leave_with_error;
}
if (start_args.result !=
BTRFS_IOCTL_DEV_REPLACE_RESULT_NO_ERROR) {
error("ioctl(DEV_REPLACE_START) on '%s' returns error: %s",
path,
replace_dev_result2string(start_args.result));
goto leave_with_error;
}
}
close_file_or_dir(fdmnt, dirstream);
return 0;
leave_with_error:
if (dstdev)
free(dstdev);
if (fdmnt != -1)
close(fdmnt);
if (fddstdev != -1)
close(fddstdev);
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 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 = btrfs_open_dir(path, &dirstream, 1);
if (fd < 0)
return 1;
ret = print_replace_status(fd, path, once);
close_file_or_dir(fd, dirstream);
return !!ret;
}
