e059b79437
%j in printfs, so put a newsted include in <sys/systm.h> where the printf prototype lives and save everybody else the trouble.
216 lines
5.4 KiB
C
216 lines
5.4 KiB
C
/*-
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* Copyright (c) 2002 Poul-Henning Kamp
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* Copyright (c) 2002 Networks Associates Technology, Inc.
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* All rights reserved.
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*
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* This software was developed for the FreeBSD Project by Poul-Henning Kamp
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* and NAI Labs, the Security Research Division of Network Associates, Inc.
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* under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
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* DARPA CHATS research program.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The names of the authors may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include "opt_geom.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/sysctl.h>
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#include <sys/bio.h>
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#include <sys/conf.h>
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#include <sys/disk.h>
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#include <sys/malloc.h>
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#include <sys/sysctl.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <geom/geom.h>
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#include <geom/geom_int.h>
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static g_access_t g_ctl_access;
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static g_start_t g_ctl_start;
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static void g_ctl_init(void);
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static d_ioctl_t g_ctl_ioctl;
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struct g_class g_ctl_class = {
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"GEOMCTL",
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NULL,
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NULL,
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G_CLASS_INITIALIZER
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};
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DECLARE_GEOM_CLASS_INIT(g_ctl_class, g_ctl, g_ctl_init);
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/*
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* We cannot do create our geom.ctl geom/provider in g_ctl_init() because
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* the event thread has to finish adding our class first and that doesn't
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* happen until later. We know however, that the events are processed in
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* FIFO order, so scheduling g_ctl_init2() with g_call_me() is safe.
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*/
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static void
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g_ctl_init2(void *p __unused)
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{
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struct g_geom *gp;
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struct g_provider *pp;
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g_topology_assert();
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gp = g_new_geomf(&g_ctl_class, "geom.ctl");
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gp->start = g_ctl_start;
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gp->access = g_ctl_access;
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pp = g_new_providerf(gp, "%s", gp->name);
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pp->sectorsize = 512;
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g_error_provider(pp, 0);
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}
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static void
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g_ctl_init(void)
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{
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mtx_unlock(&Giant);
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g_add_class(&g_ctl_class);
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g_call_me(g_ctl_init2, NULL);
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mtx_lock(&Giant);
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}
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/*
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* We allow any kind of access. Access control is handled at the devfs
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* level.
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*/
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static int
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g_ctl_access(struct g_provider *pp, int r, int w, int e)
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{
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int error;
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g_trace(G_T_ACCESS, "g_ctl_access(%s, %d, %d, %d)",
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pp->name, r, w, e);
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g_topology_assert();
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error = 0;
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return (error);
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}
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static void
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g_ctl_start(struct bio *bp)
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{
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struct g_ioctl *gio;
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int error;
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switch(bp->bio_cmd) {
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case BIO_DELETE:
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case BIO_READ:
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case BIO_WRITE:
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error = EOPNOTSUPP;
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break;
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case BIO_GETATTR:
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case BIO_SETATTR:
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if (strcmp(bp->bio_attribute, "GEOM::ioctl") ||
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bp->bio_length != sizeof *gio) {
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error = EOPNOTSUPP;
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break;
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}
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gio = (struct g_ioctl *)bp->bio_data;
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gio->func = g_ctl_ioctl;
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error = EDIRIOCTL;
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break;
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default:
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error = EOPNOTSUPP;
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break;
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}
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g_io_deliver(bp, error);
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return;
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}
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/*
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* All the stuff above is really just needed to get to the stuff below
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*/
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static int
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g_ctl_ioctl_configgeom(dev_t dev, u_long cmd, caddr_t data, int fflag, struct thread *td)
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{
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struct geomconfiggeom *gcp;
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struct g_configargs ga;
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int error;
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error = 0;
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bzero(&ga, sizeof ga);
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gcp = (struct geomconfiggeom *)data;
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ga.class = g_idclass(&gcp->class);
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if (ga.class == NULL)
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return (EINVAL);
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if (ga.class->config == NULL)
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return (EOPNOTSUPP);
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ga.geom = g_idgeom(&gcp->geom);
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ga.provider = g_idprovider(&gcp->provider);
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ga.len = gcp->len;
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if (gcp->len > 64 * 1024)
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return (EINVAL);
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else if (gcp->len == 0) {
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ga.ptr = NULL;
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} else {
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ga.ptr = g_malloc(gcp->len, M_WAITOK);
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error = copyin(gcp->ptr, ga.ptr, gcp->len);
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if (error) {
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g_free(ga.ptr);
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return (error);
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}
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}
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ga.flag = gcp->flag;
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error = ga.class->config(&ga);
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if (gcp->len != 0)
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copyout(ga.ptr, gcp->ptr, gcp->len); /* Ignore error */
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gcp->class.u.id = (uintptr_t)ga.class;
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gcp->class.len = 0;
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gcp->geom.u.id = (uintptr_t)ga.geom;
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gcp->geom.len = 0;
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gcp->provider.u.id = (uintptr_t)ga.provider;
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gcp->provider.len = 0;
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return(error);
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}
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static int
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g_ctl_ioctl(dev_t dev, u_long cmd, caddr_t data, int fflag, struct thread *td)
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{
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int error;
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DROP_GIANT();
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g_topology_lock();
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switch(cmd) {
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case GEOMCONFIGGEOM:
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error = g_ctl_ioctl_configgeom(dev, cmd, data, fflag, td);
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break;
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default:
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error = ENOTTY;
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break;
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}
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g_topology_unlock();
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PICKUP_GIANT();
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return (error);
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}
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