Function vfs_copyopt

freebsd/kern/vfs_mount.c:2223–2240

* Find and copy a mount option. * * The size of the buffer has to be specified * in len, if it is not the same length as the * mount option, EINVAL is returned. * Returns ENOENT if the option is not found. */

 * Returns ENOENT if the option is not found.
 */
int
vfs_copyopt(struct vfsoptlist *opts, const char *name, void *dest, int len)
{
	struct vfsopt *opt;

	KASSERT(opts != NULL, ("vfs_copyopt: caller passed 'opts' as NULL"));

	TAILQ_FOREACH(opt, opts, link) {
		if (strcmp(name, opt->name) == 0) {
			opt->seen = 1;
			if (len != opt->len)
				return (EINVAL);
			bcopy(opt->value, dest, opt->len);
			return (0);
		}
	}
	return (ENOENT);
}

int
__vfs_statfs(struct mount *mp, struct statfs *sbp)