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btrfs-progs: remove unused btrfs_list_get_default_subvolume

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It has been replaced by libbtrfsutil function in 9e73a416f0
("btrfs-progs: use libbtrfsutil for get-default").

Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
David Sterba 2021-09-29 18:22:38 +02:00
parent 68b8ea0020
commit d66740eeb5
2 changed files with 0 additions and 55 deletions
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54
btrfs-list.c
View File

@ -915,60 +915,6 @@ build:
return full;
}
int btrfs_list_get_default_subvolume(int fd, u64 *default_id)
{
struct btrfs_ioctl_search_args args;
struct btrfs_ioctl_search_key *sk = &args.key;
struct btrfs_ioctl_search_header *sh;
u64 found = 0;
int ret;
memset(&args, 0, sizeof(args));
/*
* search for a dir item with a name 'default' in the tree of
* tree roots, it should point us to a default root
*/
sk->tree_id = BTRFS_ROOT_TREE_OBJECTID;
/* don't worry about ancient format and request only one item */
sk->nr_items = 1;
sk->max_objectid = BTRFS_ROOT_TREE_DIR_OBJECTID;
sk->min_objectid = BTRFS_ROOT_TREE_DIR_OBJECTID;
sk->max_type = BTRFS_DIR_ITEM_KEY;
sk->min_type = BTRFS_DIR_ITEM_KEY;
sk->max_offset = (u64)-1;
sk->max_transid = (u64)-1;
ret = ioctl(fd, BTRFS_IOC_TREE_SEARCH, &args);
if (ret < 0)
return ret;
/* the ioctl returns the number of items it found in nr_items */
if (sk->nr_items == 0)
goto out;
sh = (struct btrfs_ioctl_search_header *)args.buf;
if (btrfs_search_header_type(sh) == BTRFS_DIR_ITEM_KEY) {
struct btrfs_dir_item *di;
int name_len;
char *name;
di = (struct btrfs_dir_item *)(sh + 1);
name_len = btrfs_stack_dir_name_len(di);
name = (char *)(di + 1);
if (!strncmp("default", name, name_len))
found = btrfs_disk_key_objectid(&di->location);
}
out:
*default_id = found;
return 0;
}
static int list_subvol_search(int fd, struct root_lookup *root_lookup)
{
int ret;

1
btrfs-list.h
View File

@ -164,6 +164,5 @@ int btrfs_list_subvols_print(int fd, struct btrfs_list_filter_set *filter_set,
enum btrfs_list_layout layout, int full_path,
const char *raw_prefix);
int btrfs_list_find_updated_files(int fd, u64 root_id, u64 oldest_gen);
int btrfs_list_get_default_subvolume(int fd, u64 *default_id);
#endif