diff options
Diffstat (limited to 'utils.c')
| -rw-r--r-- | utils.c | 159 |
1 files changed, 11 insertions, 148 deletions
@@ -40,6 +40,8 @@ #include <linux/magic.h> #include <getopt.h> +#include <btrfsutil.h> + #include "kerncompat.h" #include "radix-tree.h" #include "ctree.h" @@ -1048,7 +1050,7 @@ int btrfs_device_already_in_root(struct btrfs_root *root, int fd, * structures. */ if (btrfs_super_magic(disk_super) != BTRFS_MAGIC && - btrfs_super_magic(disk_super) != BTRFS_MAGIC_PARTIAL) + btrfs_super_magic(disk_super) != BTRFS_MAGIC_TEMPORARY) goto brelse; if (!memcmp(disk_super->fsid, root->fs_info->super_copy->fsid, @@ -1453,6 +1455,7 @@ u64 parse_qgroupid(const char *p) char *s = strchr(p, '/'); const char *ptr_src_end = p + strlen(p); char *ptr_parse_end = NULL; + enum btrfs_util_error err; u64 level; u64 id; int fd; @@ -1480,8 +1483,8 @@ u64 parse_qgroupid(const char *p) path: /* Path format like subv at 'my_subvol' is the fallback case */ - ret = test_issubvolume(p); - if (ret < 0 || !ret) + err = btrfs_util_is_subvolume(p); + if (err) goto err; fd = open(p, O_RDONLY); if (fd < 0) @@ -2451,163 +2454,23 @@ int test_issubvolname(const char *name) strcmp(name, ".") && strcmp(name, ".."); } -/* - * Test if path is a subvolume - * Returns: - * 0 - path exists but it is not a subvolume - * 1 - path exists and it is a subvolume - * < 0 - error - */ -int test_issubvolume(const char *path) -{ - struct stat st; - struct statfs stfs; - int res; - - res = stat(path, &st); - if (res < 0) - return -errno; - - if (st.st_ino != BTRFS_FIRST_FREE_OBJECTID || !S_ISDIR(st.st_mode)) - return 0; - - res = statfs(path, &stfs); - if (res < 0) - return -errno; - - return (int)stfs.f_type == BTRFS_SUPER_MAGIC; -} - const char *subvol_strip_mountpoint(const char *mnt, const char *full_path) { int len = strlen(mnt); if (!len) return full_path; + if ((strncmp(mnt, full_path, len) != 0) || (full_path[len] != '/')) { + error("not on mount point: %s", mnt); + exit(1); + } + if (mnt[len - 1] != '/') len += 1; return full_path + len; } -/* - * Returns - * <0: Std error - * 0: All fine - * 1: Error; and error info printed to the terminal. Fixme. - * 2: If the fullpath is root tree instead of subvol tree - */ -int get_subvol_info(const char *fullpath, struct root_info *get_ri) -{ - u64 sv_id; - int ret = 1; - int fd = -1; - int mntfd = -1; - char *mnt = NULL; - const char *svpath = NULL; - DIR *dirstream1 = NULL; - DIR *dirstream2 = NULL; - - ret = test_issubvolume(fullpath); - if (ret < 0) - return ret; - if (!ret) { - error("not a subvolume: %s", fullpath); - return 1; - } - - ret = find_mount_root(fullpath, &mnt); - if (ret < 0) - return ret; - if (ret > 0) { - error("%s doesn't belong to btrfs mount point", fullpath); - return 1; - } - ret = 1; - svpath = subvol_strip_mountpoint(mnt, fullpath); - - fd = btrfs_open_dir(fullpath, &dirstream1, 1); - if (fd < 0) - goto out; - - ret = btrfs_list_get_path_rootid(fd, &sv_id); - if (ret) - goto out; - - mntfd = btrfs_open_dir(mnt, &dirstream2, 1); - if (mntfd < 0) - goto out; - - memset(get_ri, 0, sizeof(*get_ri)); - get_ri->root_id = sv_id; - - if (sv_id == BTRFS_FS_TREE_OBJECTID) - ret = btrfs_get_toplevel_subvol(mntfd, get_ri); - else - ret = btrfs_get_subvol(mntfd, get_ri); - if (ret) - error("can't find '%s': %d", svpath, ret); - -out: - close_file_or_dir(mntfd, dirstream2); - close_file_or_dir(fd, dirstream1); - free(mnt); - - return ret; -} - -int get_subvol_info_by_rootid(const char *mnt, struct root_info *get_ri, u64 r_id) -{ - int fd; - int ret; - DIR *dirstream = NULL; - - fd = btrfs_open_dir(mnt, &dirstream, 1); - if (fd < 0) - return -EINVAL; - - memset(get_ri, 0, sizeof(*get_ri)); - get_ri->root_id = r_id; - - if (r_id == BTRFS_FS_TREE_OBJECTID) - ret = btrfs_get_toplevel_subvol(fd, get_ri); - else - ret = btrfs_get_subvol(fd, get_ri); - - if (ret) - error("can't find rootid '%llu' on '%s': %d", r_id, mnt, ret); - - close_file_or_dir(fd, dirstream); - - return ret; -} - -int get_subvol_info_by_uuid(const char *mnt, struct root_info *get_ri, u8 *uuid_arg) -{ - int fd; - int ret; - DIR *dirstream = NULL; - - fd = btrfs_open_dir(mnt, &dirstream, 1); - if (fd < 0) - return -EINVAL; - - memset(get_ri, 0, sizeof(*get_ri)); - uuid_copy(get_ri->uuid, uuid_arg); - - ret = btrfs_get_subvol(fd, get_ri); - if (ret) { - char uuid_parsed[BTRFS_UUID_UNPARSED_SIZE]; - uuid_unparse(uuid_arg, uuid_parsed); - error("can't find uuid '%s' on '%s': %d", - uuid_parsed, mnt, ret); - } - - close_file_or_dir(fd, dirstream); - - return ret; -} - /* Set the seed manually */ void init_rand_seed(u64 seed) { |