83d771de78
hinge on the "verb" parameter which the class gets to interpret as it sees fit. Move the entire request into the kernel and move changed parameters back when done.
282 lines
7.4 KiB
C
282 lines
7.4 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 <sys/param.h>
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#include <sys/endian.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/conf.h>
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#include <sys/bio.h>
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#include <sys/malloc.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/sun_disklabel.h>
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#include <geom/geom.h>
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#include <geom/geom_slice.h>
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#include <machine/endian.h>
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#define SUNLABEL_CLASS_NAME "SUN"
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struct g_sunlabel_softc {
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int sectorsize;
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int nheads;
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int nsects;
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int nalt;
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};
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static int
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g_sunlabel_modify(struct g_geom *gp, struct g_sunlabel_softc *ms, u_char *sec0)
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{
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int i, error;
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u_int u, v, csize;
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struct sun_disklabel sl;
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error = sunlabel_dec(sec0, &sl);
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if (error)
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return (error);
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csize = sl.sl_ntracks * sl.sl_nsectors;
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for (i = 0; i < SUN_NPART; i++) {
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v = sl.sl_part[i].sdkp_cyloffset;
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u = sl.sl_part[i].sdkp_nsectors;
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error = g_slice_config(gp, i, G_SLICE_CONFIG_CHECK,
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((off_t)v * csize) << 9ULL,
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((off_t)u) << 9ULL,
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ms->sectorsize,
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"%s%c", gp->name, 'a' + i);
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if (error)
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return (error);
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}
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for (i = 0; i < SUN_NPART; i++) {
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v = sl.sl_part[i].sdkp_cyloffset;
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u = sl.sl_part[i].sdkp_nsectors;
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g_slice_config(gp, i, G_SLICE_CONFIG_SET,
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((off_t)v * csize) << 9ULL,
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((off_t)u) << 9ULL,
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ms->sectorsize,
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"%s%c", gp->name, 'a' + i);
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}
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ms->nalt = sl.sl_acylinders;
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ms->nheads = sl.sl_ntracks;
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ms->nsects = sl.sl_nsectors;
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return (0);
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}
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static void
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g_sunlabel_hotwrite(void *arg, int flag)
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{
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struct bio *bp;
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struct g_geom *gp;
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struct g_slicer *gsp;
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struct g_slice *gsl;
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struct g_sunlabel_softc *ms;
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u_char *p;
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int error;
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KASSERT(flag != EV_CANCEL, ("g_sunlabel_hotwrite cancelled"));
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bp = arg;
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gp = bp->bio_to->geom;
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gsp = gp->softc;
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ms = gsp->softc;
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gsl = &gsp->slices[bp->bio_to->index];
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/*
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* XXX: For all practical purposes, this whould be equvivalent to
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* XXX: "p = (u_char *)bp->bio_data;" because the label is always
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* XXX: in the first sector and we refuse sectors smaller than the
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* XXX: label.
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*/
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p = (u_char *)bp->bio_data - (bp->bio_offset + gsl->offset);
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error = g_sunlabel_modify(gp, ms, p);
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if (error) {
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g_io_deliver(bp, EPERM);
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return;
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}
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g_slice_finish_hot(bp);
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}
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static void
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g_sunlabel_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, struct g_consumer *cp __unused, struct g_provider *pp)
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{
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struct g_slicer *gsp;
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struct g_sunlabel_softc *ms;
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gsp = gp->softc;
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ms = gsp->softc;
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g_slice_dumpconf(sb, indent, gp, cp, pp);
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if (indent == NULL) {
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sbuf_printf(sb, " sc %u hd %u alt %u",
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ms->nsects, ms->nheads, ms->nalt);
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}
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}
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struct g_hh01 {
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struct g_geom *gp;
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struct g_sunlabel_softc *ms;
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u_char *label;
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int error;
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};
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static void
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g_sunlabel_callconfig(void *arg, int flag)
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{
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struct g_hh01 *hp;
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hp = arg;
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hp->error = g_sunlabel_modify(hp->gp, hp->ms, hp->label);
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if (!hp->error)
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hp->error = g_write_data(LIST_FIRST(&hp->gp->consumer),
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0, hp->label, SUN_SIZE);
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}
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/*
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* NB! curthread is user process which GCTL'ed.
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*/
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static void
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g_sunlabel_config(struct gctl_req *req, struct g_class *mp, const char *verb)
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{
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u_char *label;
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int error, i;
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struct g_hh01 h0h0;
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struct g_slicer *gsp;
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struct g_geom *gp;
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struct g_consumer *cp;
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g_topology_assert();
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gp = gctl_get_geom(req, mp, "geom");
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if (gp == NULL)
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return;
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cp = LIST_FIRST(&gp->consumer);
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gsp = gp->softc;
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if (!strcmp(verb, "write label")) {
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label = gctl_get_paraml(req, "label", SUN_SIZE);
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if (label == NULL)
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return;
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h0h0.gp = gp;
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h0h0.ms = gsp->softc;
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h0h0.label = label;
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h0h0.error = -1;
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/* XXX: Does this reference register with our selfdestruct code ? */
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error = g_access_rel(cp, 1, 1, 1);
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if (error) {
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gctl_error(req, "could not access consumer");
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return;
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}
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g_sunlabel_callconfig(&h0h0, 0);
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g_access_rel(cp, -1, -1, -1);
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} else if (!strcmp(verb, "write bootcode")) {
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label = gctl_get_paraml(req, "bootcode", SUN_BOOTSIZE);
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if (label == NULL)
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return;
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/* XXX: Does this reference register with our selfdestruct code ? */
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error = g_access_rel(cp, 1, 1, 1);
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if (error) {
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gctl_error(req, "could not access consumer");
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return;
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}
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for (i = 0; i < SUN_NPART; i++) {
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if (gsp->slices[i].length <= SUN_BOOTSIZE)
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continue;
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g_write_data(cp,
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gsp->slices[i].offset + SUN_SIZE, label + SUN_SIZE,
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SUN_BOOTSIZE - SUN_SIZE);
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}
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g_access_rel(cp, -1, -1, -1);
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} else {
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gctl_error(req, "Unknown verb parameter");
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}
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}
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static struct g_geom *
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g_sunlabel_taste(struct g_class *mp, struct g_provider *pp, int flags)
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{
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struct g_geom *gp;
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struct g_consumer *cp;
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int error;
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u_char *buf;
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struct g_sunlabel_softc *ms;
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struct g_slicer *gsp;
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g_trace(G_T_TOPOLOGY, "g_sunlabel_taste(%s,%s)", mp->name, pp->name);
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g_topology_assert();
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if (flags == G_TF_NORMAL &&
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!strcmp(pp->geom->class->name, SUNLABEL_CLASS_NAME))
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return (NULL);
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gp = g_slice_new(mp, 8, pp, &cp, &ms, sizeof *ms, NULL);
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if (gp == NULL)
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return (NULL);
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gsp = gp->softc;
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gp->dumpconf = g_sunlabel_dumpconf;
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do {
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if (gp->rank != 2 && flags == G_TF_NORMAL)
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break;
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ms->sectorsize = cp->provider->sectorsize;
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if (ms->sectorsize < 512)
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break;
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g_topology_unlock();
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buf = g_read_data(cp, 0, ms->sectorsize, &error);
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g_topology_lock();
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if (buf == NULL || error != 0)
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break;
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g_sunlabel_modify(gp, ms, buf);
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g_free(buf);
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break;
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} while (0);
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g_access_rel(cp, -1, 0, 0);
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if (LIST_EMPTY(&gp->provider)) {
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g_slice_spoiled(cp);
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return (NULL);
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}
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g_slice_conf_hot(gp, 0, 0, SUN_SIZE,
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G_SLICE_HOT_ALLOW, G_SLICE_HOT_DENY, G_SLICE_HOT_CALL);
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gsp->hot = g_sunlabel_hotwrite;
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return (gp);
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}
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static struct g_class g_sunlabel_class = {
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.name = SUNLABEL_CLASS_NAME,
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.taste = g_sunlabel_taste,
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.ctlreq = g_sunlabel_config,
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};
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DECLARE_GEOM_CLASS(g_sunlabel_class, g_sunlabel);
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