/*
* Find the mount point for a mounted device.
* On success, returns 0 with mountpoint in *mp.
* On failure, returns -errno (not mounted yields -EINVAL)
* Is noisy on failures, expects to be given a mounted device.
*/
int get_btrfs_mount(const char *dev, char *mp, size_t mp_size)
{
int ret;
int fd = -1;
ret = is_block_device(dev);
if (ret <= 0) {
if (!ret) {
fprintf(stderr, "%s is not a block device\n", dev);
ret = -EINVAL;
} else {
fprintf(stderr, "Could not check %s: %s\n",
dev, strerror(-ret));
}
goto out;
}
fd = open(dev, O_RDONLY);
if (fd < 0) {
ret = -errno;
fprintf(stderr, "Could not open %s: %s\n", dev, strerror(errno));
goto out;
}
ret = check_mounted_where(fd, dev, mp, mp_size, NULL);
if (!ret) {
ret = -EINVAL;
} else { /* mounted, all good */
ret = 0;
}
out:
if (fd != -1)
close(fd);
return ret;
}
static int cmd_scrub_cancel(int argc, char **argv)
{
char *path;
int ret;
int fdmnt;
int err;
char mp[BTRFS_PATH_NAME_MAX + 1];
struct btrfs_fs_devices *fs_devices_mnt = NULL;
if (check_argc_exact(argc, 2))
usage(cmd_scrub_cancel_usage);
path = argv[1];
fdmnt = open_file_or_dir(path);
if (fdmnt < 0) {
fprintf(stderr, "ERROR: scrub cancel failed\n");
return 12;
}
again:
ret = ioctl(fdmnt, BTRFS_IOC_SCRUB_CANCEL, NULL);
err = errno;
close(fdmnt);
if (ret && err == EINVAL) {
/* path is no mounted btrfs. try if it's a device */
ret = check_mounted_where(fdmnt, path, mp, sizeof(mp),
&fs_devices_mnt);
close(fdmnt);
if (ret) {
fdmnt = open_file_or_dir(mp);
if (fdmnt >= 0) {
path = mp;
goto again;
}
}
}
if (ret) {
fprintf(stderr, "ERROR: scrub cancel failed on %s: %s\n", path,
err == ENOTCONN ? "not running" : strerror(errno));
return 1;
}
printf("scrub cancelled\n");
return 0;
}
