1/*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2009 Fabio Checconi 5 * Copyright (c) 2010 Luigi Rizzo, Universita` di Pisa 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30/* 31 * $Id$ 32 * $FreeBSD: stable/11/sbin/geom/class/sched/geom_sched.c 330449 2018-03-05 07:26:05Z eadler $ 33 * 34 * This file implements the userspace library used by the 'geom' 35 * command to load and manipulate disk schedulers. 36 */ 37 38#include <sys/cdefs.h> 39#include <sys/param.h> 40#include <sys/linker.h> 41#include <sys/module.h> 42 43#include <stdio.h> 44#include <stdint.h> 45#include <libgeom.h> 46 47#include "core/geom.h" 48#include "misc/subr.h" 49 50#define G_SCHED_VERSION 0 51 52uint32_t lib_version = G_LIB_VERSION; 53uint32_t version = G_SCHED_VERSION; 54 55/* 56 * storage for parameters used by this geom class. 57 * Right now only the scheduler name is used. 58 */ 59#define GSCHED_ALGO "rr" /* default scheduler */ 60 61/* 62 * Adapt to differences in geom library. 63 * in V1 struct g_command misses gc_argname, eld, and G_BOOL is undefined 64 */ 65#if G_LIB_VERSION <= 1 66#define G_TYPE_BOOL G_TYPE_NUMBER 67#endif 68#if G_LIB_VERSION >= 3 && G_LIB_VERSION <= 4 69#define G_ARGNAME NULL, 70#else 71#define G_ARGNAME 72#endif 73 74static void 75gcmd_createinsert(struct gctl_req *req, unsigned flags __unused) 76{ 77 const char *reqalgo; 78 char name[64]; 79 80 if (gctl_has_param(req, "algo")) 81 reqalgo = gctl_get_ascii(req, "algo"); 82 else 83 reqalgo = GSCHED_ALGO; 84 85 snprintf(name, sizeof(name), "gsched_%s", reqalgo); 86 /* 87 * Do not complain about errors here, gctl_issue() 88 * will fail anyway. 89 */ 90 if (modfind(name) < 0) 91 kldload(name); 92 gctl_issue(req); 93} 94 95struct g_command class_commands[] = { 96 { "create", G_FLAG_VERBOSE | G_FLAG_LOADKLD, gcmd_createinsert, 97 { 98 { 'a', "algo", GSCHED_ALGO, G_TYPE_STRING }, 99 G_OPT_SENTINEL 100 }, 101 G_ARGNAME "[-v] [-a algorithm_name] dev ..." 102 }, 103 { "insert", G_FLAG_VERBOSE | G_FLAG_LOADKLD, gcmd_createinsert, 104 { 105 { 'a', "algo", GSCHED_ALGO, G_TYPE_STRING }, 106 G_OPT_SENTINEL 107 }, 108 G_ARGNAME "[-v] [-a algorithm_name] dev ..." 109 }, 110 { "configure", G_FLAG_VERBOSE, NULL, 111 { 112 { 'a', "algo", GSCHED_ALGO, G_TYPE_STRING }, 113 G_OPT_SENTINEL 114 }, 115 G_ARGNAME "[-v] [-a algorithm_name] prov ..." 116 }, 117 { "destroy", G_FLAG_VERBOSE, NULL, 118 { 119 { 'f', "force", NULL, G_TYPE_BOOL }, 120 G_OPT_SENTINEL 121 }, 122 G_ARGNAME "[-fv] prov ..." 123 }, 124 { "reset", G_FLAG_VERBOSE, NULL, G_NULL_OPTS, 125 G_ARGNAME "[-v] prov ..." 126 }, 127 G_CMD_SENTINEL 128}; 129