1/*- 2 * Copyright (c) 2009 Fabio Checconi 3 * Copyright (c) 2010 Luigi Rizzo, Universita` di Pisa 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28/* 29 * $Id$ 30 * $FreeBSD: releng/11.0/sbin/geom/class/sched/geom_sched.c 212554 2010-09-13 13:48:18Z pjd $ 31 * 32 * This file implements the userspace library used by the 'geom' 33 * command to load and manipulate disk schedulers. 34 */ 35 36#include <sys/cdefs.h> 37#include <sys/param.h> 38#include <sys/linker.h> 39#include <sys/module.h> 40 41#include <stdio.h> 42#include <stdint.h> 43#include <libgeom.h> 44 45#include "core/geom.h" 46#include "misc/subr.h" 47 48#define G_SCHED_VERSION 0 49 50uint32_t lib_version = G_LIB_VERSION; 51uint32_t version = G_SCHED_VERSION; 52 53/* 54 * storage for parameters used by this geom class. 55 * Right now only the scheduler name is used. 56 */ 57#define GSCHED_ALGO "rr" /* default scheduler */ 58 59/* 60 * Adapt to differences in geom library. 61 * in V1 struct g_command misses gc_argname, eld, and G_BOOL is undefined 62 */ 63#if G_LIB_VERSION <= 1 64#define G_TYPE_BOOL G_TYPE_NUMBER 65#endif 66#if G_LIB_VERSION >= 3 && G_LIB_VERSION <= 4 67#define G_ARGNAME NULL, 68#else 69#define G_ARGNAME 70#endif 71 72static void 73gcmd_createinsert(struct gctl_req *req, unsigned flags __unused) 74{ 75 const char *reqalgo; 76 char name[64]; 77 78 if (gctl_has_param(req, "algo")) 79 reqalgo = gctl_get_ascii(req, "algo"); 80 else 81 reqalgo = GSCHED_ALGO; 82 83 snprintf(name, sizeof(name), "gsched_%s", reqalgo); 84 /* 85 * Do not complain about errors here, gctl_issue() 86 * will fail anyway. 87 */ 88 if (modfind(name) < 0) 89 kldload(name); 90 gctl_issue(req); 91} 92 93struct g_command class_commands[] = { 94 { "create", G_FLAG_VERBOSE | G_FLAG_LOADKLD, gcmd_createinsert, 95 { 96 { 'a', "algo", GSCHED_ALGO, G_TYPE_STRING }, 97 G_OPT_SENTINEL 98 }, 99 G_ARGNAME "[-v] [-a algorithm_name] dev ..." 100 }, 101 { "insert", G_FLAG_VERBOSE | G_FLAG_LOADKLD, gcmd_createinsert, 102 { 103 { 'a', "algo", GSCHED_ALGO, G_TYPE_STRING }, 104 G_OPT_SENTINEL 105 }, 106 G_ARGNAME "[-v] [-a algorithm_name] dev ..." 107 }, 108 { "configure", G_FLAG_VERBOSE, NULL, 109 { 110 { 'a', "algo", GSCHED_ALGO, G_TYPE_STRING }, 111 G_OPT_SENTINEL 112 }, 113 G_ARGNAME "[-v] [-a algorithm_name] prov ..." 114 }, 115 { "destroy", G_FLAG_VERBOSE, NULL, 116 { 117 { 'f', "force", NULL, G_TYPE_BOOL }, 118 G_OPT_SENTINEL 119 }, 120 G_ARGNAME "[-fv] prov ..." 121 }, 122 { "reset", G_FLAG_VERBOSE, NULL, G_NULL_OPTS, 123 G_ARGNAME "[-v] prov ..." 124 }, 125 G_CMD_SENTINEL 126}; 127