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/*-
* Copyright (c) 2009 Fabio Checconi
* Copyright (c) 2010 Luigi Rizzo, Universita` di Pisa
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* $Id$
* $FreeBSD$
*
* This file implements the userspace library used by the 'geom'
* command to load and manipulate disk schedulers.
*/
#include <sys/cdefs.h>
#include <sys/param.h>
#include <sys/linker.h>
#include <sys/module.h>
#include <stdio.h>
#include <stdint.h>
#include <libgeom.h>
#include "core/geom.h"
#include "misc/subr.h"
#define G_SCHED_VERSION 0
uint32_t lib_version = G_LIB_VERSION;
uint32_t version = G_SCHED_VERSION;
/*
* storage for parameters used by this geom class.
* Right now only the scheduler name is used.
*/
static char algo[] = "rr"; /* default scheduler */
/*
* Adapt to differences in geom library.
* in V1 struct g_command misses gc_argname, eld, and G_BOOL is undefined
*/
#if G_LIB_VERSION == 1
#define G_ARGNAME
#define G_TYPE_BOOL G_TYPE_NUMBER
#else
#define G_ARGNAME NULL,
#endif
static void
gcmd_createinsert(struct gctl_req *req, unsigned flags __unused)
{
const char *reqalgo;
char name[64];
if (gctl_has_param(req, "algo"))
reqalgo = gctl_get_ascii(req, "algo");
else
reqalgo = algo;
snprintf(name, sizeof(name), "gsched_%s", reqalgo);
/*
* Do not complain about errors here, gctl_issue()
* will fail anyway.
*/
if (modfind(name) < 0)
kldload(name);
gctl_issue(req);
}
struct g_command class_commands[] = {
{ "create", G_FLAG_VERBOSE | G_FLAG_LOADKLD, gcmd_createinsert,
{
{ 'a', "algo", algo, G_TYPE_STRING },
G_OPT_SENTINEL
},
G_ARGNAME "[-v] [-a algorithm_name] dev ..."
},
{ "insert", G_FLAG_VERBOSE | G_FLAG_LOADKLD, gcmd_createinsert,
{
{ 'a', "algo", algo, G_TYPE_STRING },
G_OPT_SENTINEL
},
G_ARGNAME "[-v] [-a algorithm_name] dev ..."
},
{ "configure", G_FLAG_VERBOSE, NULL,
{
{ 'a', "algo", algo, G_TYPE_STRING },
G_OPT_SENTINEL
},
G_ARGNAME "[-v] [-a algorithm_name] prov ..."
},
{ "destroy", G_FLAG_VERBOSE, NULL,
{
{ 'f', "force", NULL, G_TYPE_BOOL },
G_OPT_SENTINEL
},
G_ARGNAME "[-fv] prov ..."
},
{ "reset", G_FLAG_VERBOSE, NULL, G_NULL_OPTS,
G_ARGNAME "[-v] prov ..."
},
G_CMD_SENTINEL
};
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