diff options
Diffstat (limited to 'utils.c')
| -rw-r--r-- | utils.c | 18 |
1 files changed, 16 insertions, 2 deletions
@@ -1678,6 +1678,10 @@ int get_fs_info(char *path, struct btrfs_ioctl_fs_info_args *fi_args, memset(fi_args, 0, sizeof(*fi_args)); if (is_block_device(path)) { + struct btrfs_super_block *disk_super; + char buf[BTRFS_SUPER_INFO_SIZE]; + u64 devid; + /* Ensure it's mounted, then set path to the mountpoint */ fd = open(path, O_RDONLY); if (fd < 0) { @@ -1697,8 +1701,18 @@ int get_fs_info(char *path, struct btrfs_ioctl_fs_info_args *fi_args, path = mp; /* Only fill in this one device */ fi_args->num_devices = 1; - fi_args->max_id = fs_devices_mnt->latest_devid; - i = fs_devices_mnt->latest_devid; + + disk_super = (struct btrfs_super_block *)buf; + ret = btrfs_read_dev_super(fd, disk_super, BTRFS_SUPER_INFO_OFFSET); + if (ret < 0) { + ret = -EIO; + goto out; + } + devid = btrfs_stack_device_id(&disk_super->dev_item); + + fi_args->max_id = devid; + i = devid; + memcpy(fi_args->fsid, fs_devices_mnt->fsid, BTRFS_FSID_SIZE); close(fd); } |