1206497Sluigi/*- 2330449Seadler * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3330449Seadler * 4206552Sluigi * Copyright (c) 2009 Fabio Checconi 5206552Sluigi * Copyright (c) 2010 Luigi Rizzo, Universita` di Pisa 6206497Sluigi * All rights reserved. 7206497Sluigi * 8206497Sluigi * Redistribution and use in source and binary forms, with or without 9206497Sluigi * modification, are permitted provided that the following conditions 10206497Sluigi * are met: 11206497Sluigi * 1. Redistributions of source code must retain the above copyright 12206497Sluigi * notice, this list of conditions and the following disclaimer. 13206497Sluigi * 2. Redistributions in binary form must reproduce the above copyright 14206497Sluigi * notice, this list of conditions and the following disclaimer in the 15206497Sluigi * documentation and/or other materials provided with the distribution. 16206497Sluigi * 17206497Sluigi * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 18206497Sluigi * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19206497Sluigi * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20206497Sluigi * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 21206497Sluigi * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22206497Sluigi * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23206497Sluigi * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24206497Sluigi * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25206497Sluigi * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26206497Sluigi * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27206497Sluigi * SUCH DAMAGE. 28206497Sluigi */ 29206497Sluigi 30206497Sluigi/* 31206497Sluigi * $Id$ 32206497Sluigi * $FreeBSD: stable/11/sbin/geom/class/sched/geom_sched.c 330449 2018-03-05 07:26:05Z eadler $ 33206497Sluigi * 34206497Sluigi * This file implements the userspace library used by the 'geom' 35206497Sluigi * command to load and manipulate disk schedulers. 36206497Sluigi */ 37206497Sluigi 38206497Sluigi#include <sys/cdefs.h> 39206497Sluigi#include <sys/param.h> 40206497Sluigi#include <sys/linker.h> 41206497Sluigi#include <sys/module.h> 42206497Sluigi 43206497Sluigi#include <stdio.h> 44206497Sluigi#include <stdint.h> 45206497Sluigi#include <libgeom.h> 46206497Sluigi 47206497Sluigi#include "core/geom.h" 48206497Sluigi#include "misc/subr.h" 49206497Sluigi 50206497Sluigi#define G_SCHED_VERSION 0 51206497Sluigi 52206497Sluigiuint32_t lib_version = G_LIB_VERSION; 53206497Sluigiuint32_t version = G_SCHED_VERSION; 54206497Sluigi 55206497Sluigi/* 56206497Sluigi * storage for parameters used by this geom class. 57206497Sluigi * Right now only the scheduler name is used. 58206497Sluigi */ 59212547Spjd#define GSCHED_ALGO "rr" /* default scheduler */ 60206497Sluigi 61206497Sluigi/* 62206497Sluigi * Adapt to differences in geom library. 63206497Sluigi * in V1 struct g_command misses gc_argname, eld, and G_BOOL is undefined 64206497Sluigi */ 65212554Spjd#if G_LIB_VERSION <= 1 66206497Sluigi#define G_TYPE_BOOL G_TYPE_NUMBER 67212554Spjd#endif 68212554Spjd#if G_LIB_VERSION >= 3 && G_LIB_VERSION <= 4 69212554Spjd#define G_ARGNAME NULL, 70206497Sluigi#else 71212554Spjd#define G_ARGNAME 72206497Sluigi#endif 73206497Sluigi 74206497Sluigistatic void 75206497Sluigigcmd_createinsert(struct gctl_req *req, unsigned flags __unused) 76206497Sluigi{ 77206497Sluigi const char *reqalgo; 78206497Sluigi char name[64]; 79206497Sluigi 80206497Sluigi if (gctl_has_param(req, "algo")) 81206497Sluigi reqalgo = gctl_get_ascii(req, "algo"); 82206497Sluigi else 83212547Spjd reqalgo = GSCHED_ALGO; 84206497Sluigi 85206497Sluigi snprintf(name, sizeof(name), "gsched_%s", reqalgo); 86206497Sluigi /* 87206497Sluigi * Do not complain about errors here, gctl_issue() 88206497Sluigi * will fail anyway. 89206497Sluigi */ 90206497Sluigi if (modfind(name) < 0) 91206497Sluigi kldload(name); 92206497Sluigi gctl_issue(req); 93206497Sluigi} 94206497Sluigi 95206497Sluigistruct g_command class_commands[] = { 96206497Sluigi { "create", G_FLAG_VERBOSE | G_FLAG_LOADKLD, gcmd_createinsert, 97206497Sluigi { 98212547Spjd { 'a', "algo", GSCHED_ALGO, G_TYPE_STRING }, 99206497Sluigi G_OPT_SENTINEL 100206497Sluigi }, 101206497Sluigi G_ARGNAME "[-v] [-a algorithm_name] dev ..." 102206497Sluigi }, 103206497Sluigi { "insert", G_FLAG_VERBOSE | G_FLAG_LOADKLD, gcmd_createinsert, 104206497Sluigi { 105212547Spjd { 'a', "algo", GSCHED_ALGO, G_TYPE_STRING }, 106206497Sluigi G_OPT_SENTINEL 107206497Sluigi }, 108206497Sluigi G_ARGNAME "[-v] [-a algorithm_name] dev ..." 109206497Sluigi }, 110206497Sluigi { "configure", G_FLAG_VERBOSE, NULL, 111206497Sluigi { 112212547Spjd { 'a', "algo", GSCHED_ALGO, G_TYPE_STRING }, 113206497Sluigi G_OPT_SENTINEL 114206497Sluigi }, 115206497Sluigi G_ARGNAME "[-v] [-a algorithm_name] prov ..." 116206497Sluigi }, 117206497Sluigi { "destroy", G_FLAG_VERBOSE, NULL, 118206497Sluigi { 119206497Sluigi { 'f', "force", NULL, G_TYPE_BOOL }, 120206497Sluigi G_OPT_SENTINEL 121206497Sluigi }, 122206497Sluigi G_ARGNAME "[-fv] prov ..." 123206497Sluigi }, 124206497Sluigi { "reset", G_FLAG_VERBOSE, NULL, G_NULL_OPTS, 125206497Sluigi G_ARGNAME "[-v] prov ..." 126206497Sluigi }, 127206497Sluigi G_CMD_SENTINEL 128206497Sluigi}; 129