struct btrfs_root *open_ctree(const char *filename, u64 sb_bytenr, int writes)
{
struct btrfs_fs_info *info;
info = open_ctree_fs_info(filename, sb_bytenr, 0, writes, 0);
if (!info)
return NULL;
return info->fs_root;
}
static int cmd_rescue_fix_device_size(int argc, char **argv)
{
struct btrfs_fs_info *fs_info;
char *devname;
int ret;
clean_args_no_options(argc, argv, cmd_rescue_fix_device_size_usage);
if (check_argc_exact(argc, 2))
usage(cmd_rescue_fix_device_size_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;
}
fs_info = open_ctree_fs_info(devname, 0, 0, 0, OPEN_CTREE_WRITES |
OPEN_CTREE_PARTIAL);
if (!fs_info) {
error("could not open btrfs");
ret = -EIO;
goto out;
}
ret = btrfs_fix_device_and_super_size(fs_info);
if (ret > 0)
ret = 0;
close_ctree(fs_info->tree_root);
out:
return !!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 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[37];
int ret;
int slot;
int extent_only = 0;
int device_only = 0;
int roots_only = 0;
int root_backups = 0;
u64 block_only = 0;
struct btrfs_root *tree_root_scan;
radix_tree_init();
while(1) {
int c;
c = getopt(ac, av, "deb:rR");
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 'R':
roots_only = 1;
root_backups = 1;
break;
case 'b':
block_only = atoll(optarg);
break;
default:
print_usage();
}
}
ac = ac - optind;
if (ac != 1)
print_usage();
info = open_ctree_fs_info(av[optind], 0, 0, 1);
if (!info) {
fprintf(stderr, "unable to open %s\n", av[optind]);
exit(1);
}
root = info->fs_root;
if (block_only) {
if (!root) {
fprintf(stderr, "unable to open %s\n", av[optind]);
exit(1);
}
leaf = read_tree_block(root,
block_only,
root->leafsize, 0);
if (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 (!leaf) {
fprintf(stderr, "failed to read %llu\n",
(unsigned long long)block_only);
return 0;
}
btrfs_print_tree(root, leaf, 0);
return 0;
}
if (!extent_only) {
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;
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;
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;
switch(found_key.objectid) {
case BTRFS_ROOT_TREE_OBJECTID:
if (!skip)
printf("root");
break;
case BTRFS_EXTENT_TREE_OBJECTID:
if (!device_only)
skip = 0;
if (!extent_only && !device_only)
printf("extent");
break;
case BTRFS_CHUNK_TREE_OBJECTID:
if (!skip) {
printf("chunk");
}
break;
case BTRFS_DEV_TREE_OBJECTID:
skip = 0;
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_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);
}
}
}
next:
path.slots[0]++;
}
no_node:
btrfs_release_path(root, &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)
return 0;
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[36] = '\0';
uuid_unparse(info->super_copy.fsid, uuidbuf);
printf("uuid %s\n", uuidbuf);
printf("%s\n", BTRFS_BUILD_VERSION);
return 0;
}
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;
}
