02e550fabb
Retire the "d_dump_t" and use the "dumper_t" type instead. Dumper_t takes a void * as first arg which is more general than the dev_t taken by d_dump_t. (Remember: we could have net-dumpers if somebody wrote us one!) Define the convention for GEOM controlled disk devices to be that the first argument to the dumper function is the struct disk pointer. Change device drivers accordingly.
416 lines
10 KiB
C
416 lines
10 KiB
C
/*-
|
|
* Copyright (c) 2002 Poul-Henning Kamp
|
|
* Copyright (c) 2002 Networks Associates Technology, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This software was developed for the FreeBSD Project by Poul-Henning Kamp
|
|
* and NAI Labs, the Security Research Division of Network Associates, Inc.
|
|
* under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
|
|
* DARPA CHATS research program.
|
|
*
|
|
* 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.
|
|
* 3. The names of the authors may not be used to endorse or promote
|
|
* products derived from this software without specific prior written
|
|
* permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#include "opt_geom.h"
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/sysctl.h>
|
|
#include <sys/bio.h>
|
|
#include <sys/conf.h>
|
|
#include <sys/disk.h>
|
|
#include <sys/fcntl.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/sysctl.h>
|
|
#include <sys/stdint.h>
|
|
#include <machine/md_var.h>
|
|
|
|
#include <sys/lock.h>
|
|
#include <sys/mutex.h>
|
|
#include <geom/geom.h>
|
|
|
|
static struct mtx g_disk_done_mtx;
|
|
|
|
static g_access_t g_disk_access;
|
|
|
|
struct g_class g_disk_class = {
|
|
"DISK",
|
|
NULL,
|
|
NULL,
|
|
G_CLASS_INITIALIZER
|
|
};
|
|
|
|
static void
|
|
g_disk_init(void)
|
|
{
|
|
mtx_unlock(&Giant);
|
|
g_add_class(&g_disk_class);
|
|
mtx_init(&g_disk_done_mtx, "g_disk_done", MTX_DEF, 0);
|
|
mtx_lock(&Giant);
|
|
}
|
|
|
|
DECLARE_GEOM_CLASS_INIT(g_disk_class, g_disk, g_disk_init);
|
|
|
|
static void __inline
|
|
g_disk_lock_giant(struct disk *dp)
|
|
{
|
|
if (dp->d_flags & DISKFLAG_NOGIANT)
|
|
return;
|
|
mtx_lock(&Giant);
|
|
}
|
|
|
|
static void __inline
|
|
g_disk_unlock_giant(struct disk *dp)
|
|
{
|
|
if (dp->d_flags & DISKFLAG_NOGIANT)
|
|
return;
|
|
mtx_unlock(&Giant);
|
|
}
|
|
|
|
static int
|
|
g_disk_access(struct g_provider *pp, int r, int w, int e)
|
|
{
|
|
struct disk *dp;
|
|
dev_t dev;
|
|
int error;
|
|
|
|
g_trace(G_T_ACCESS, "g_disk_access(%s, %d, %d, %d)",
|
|
pp->name, r, w, e);
|
|
g_topology_assert();
|
|
r += pp->acr;
|
|
w += pp->acw;
|
|
e += pp->ace;
|
|
dp = pp->geom->softc;
|
|
dev = dp->d_dev;
|
|
error = 0;
|
|
if ((pp->acr + pp->acw + pp->ace) == 0 && (r + w + e) > 0) {
|
|
if (dp->d_open != NULL || dp->d_copen != NULL) {
|
|
g_disk_lock_giant(dp);
|
|
if (dp->d_open != NULL)
|
|
error = dp->d_open(dp);
|
|
else
|
|
error = dp->d_copen(dev, FREAD|FWRITE, 0, NULL);
|
|
if (error != 0)
|
|
printf("Opened disk %s -> %d\n",
|
|
pp->name, error);
|
|
g_disk_unlock_giant(dp);
|
|
}
|
|
pp->mediasize = dp->d_mediasize;
|
|
pp->sectorsize = dp->d_sectorsize;
|
|
dp->d_flags |= DISKFLAG_OPEN;
|
|
if (dp->d_maxsize == 0 && dp->d_dev->si_iosize_max != 0)
|
|
dp->d_maxsize = dp->d_dev->si_iosize_max;
|
|
if (dp->d_maxsize == 0) {
|
|
printf("WARNING: Disk drive %s%d has no d_maxsize\n",
|
|
dp->d_name, dp->d_unit);
|
|
dp->d_maxsize = DFLTPHYS;
|
|
}
|
|
} else if ((pp->acr + pp->acw + pp->ace) > 0 && (r + w + e) == 0) {
|
|
if (dp->d_close != NULL || dp->d_cclose != NULL) {
|
|
g_disk_lock_giant(dp);
|
|
if (dp->d_close != NULL)
|
|
error = dp->d_close(dp);
|
|
else
|
|
error = dp->d_cclose(dev, FREAD|FWRITE, 0, NULL);
|
|
if (error != 0)
|
|
printf("Closed disk %s -> %d\n",
|
|
pp->name, error);
|
|
g_disk_unlock_giant(dp);
|
|
}
|
|
dp->d_flags &= ~DISKFLAG_OPEN;
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
static void
|
|
g_disk_kerneldump(struct bio *bp, struct disk *dp)
|
|
{
|
|
int error;
|
|
struct g_kerneldump *gkd;
|
|
struct dumperinfo di;
|
|
struct g_geom *gp;
|
|
|
|
gkd = (struct g_kerneldump*)bp->bio_data;
|
|
gp = bp->bio_to->geom;
|
|
g_trace(G_T_TOPOLOGY, "g_disk_kernedump(%s, %jd, %jd)",
|
|
gp->name, (intmax_t)gkd->offset, (intmax_t)gkd->length);
|
|
di.dumper = dp->d_dump;
|
|
di.priv = dp;
|
|
di.blocksize = dp->d_sectorsize;
|
|
di.mediaoffset = gkd->offset;
|
|
di.mediasize = gkd->length;
|
|
error = set_dumper(&di);
|
|
g_io_deliver(bp, error);
|
|
}
|
|
|
|
static void
|
|
g_disk_done(struct bio *bp)
|
|
{
|
|
|
|
/* See "notes" for why we need a mutex here */
|
|
/* XXX: will witness accept a mix of Giant/unGiant drivers here ? */
|
|
mtx_lock(&g_disk_done_mtx);
|
|
bp->bio_completed = bp->bio_length - bp->bio_resid;
|
|
g_std_done(bp);
|
|
mtx_unlock(&g_disk_done_mtx);
|
|
}
|
|
|
|
static void
|
|
g_disk_start(struct bio *bp)
|
|
{
|
|
struct bio *bp2, *bp3;
|
|
dev_t dev;
|
|
struct disk *dp;
|
|
struct g_ioctl *gio;
|
|
int error;
|
|
off_t off;
|
|
|
|
dp = bp->bio_to->geom->softc;
|
|
dev = dp->d_dev;
|
|
error = EJUSTRETURN;
|
|
switch(bp->bio_cmd) {
|
|
case BIO_DELETE:
|
|
if (!(dp->d_flags & DISKFLAG_CANDELETE)) {
|
|
error = 0;
|
|
break;
|
|
}
|
|
/* fall-through */
|
|
case BIO_READ:
|
|
case BIO_WRITE:
|
|
off = 0;
|
|
bp3 = NULL;
|
|
bp2 = g_clone_bio(bp);
|
|
if (bp2 == NULL) {
|
|
error = ENOMEM;
|
|
break;
|
|
}
|
|
do {
|
|
bp2->bio_offset += off;
|
|
bp2->bio_length -= off;
|
|
bp2->bio_data += off;
|
|
if (bp2->bio_length > dp->d_maxsize) {
|
|
/*
|
|
* XXX: If we have a stripesize we should really
|
|
* use it here.
|
|
*/
|
|
bp2->bio_length = dp->d_maxsize;
|
|
off += dp->d_maxsize;
|
|
/*
|
|
* To avoid a race, we need to grab the next bio
|
|
* before we schedule this one. See "notes".
|
|
*/
|
|
bp3 = g_clone_bio(bp);
|
|
if (bp3 == NULL)
|
|
bp->bio_error = ENOMEM;
|
|
}
|
|
bp2->bio_done = g_disk_done;
|
|
bp2->bio_blkno = bp2->bio_offset >> DEV_BSHIFT;
|
|
bp2->bio_pblkno = bp2->bio_offset / dp->d_sectorsize;
|
|
bp2->bio_bcount = bp2->bio_length;
|
|
bp2->bio_dev = dev;
|
|
bp2->bio_disk = dp;
|
|
g_disk_lock_giant(dp);
|
|
dp->d_strategy(bp2);
|
|
g_disk_unlock_giant(dp);
|
|
bp2 = bp3;
|
|
bp3 = NULL;
|
|
} while (bp2 != NULL);
|
|
break;
|
|
case BIO_GETATTR:
|
|
if (g_handleattr_int(bp, "GEOM::fwsectors", dp->d_fwsectors))
|
|
break;
|
|
else if (g_handleattr_int(bp, "GEOM::fwheads", dp->d_fwheads))
|
|
break;
|
|
else if (g_handleattr_off_t(bp, "GEOM::frontstuff", 0))
|
|
break;
|
|
else if (!strcmp(bp->bio_attribute, "GEOM::kerneldump"))
|
|
g_disk_kerneldump(bp, dp);
|
|
else if ((dp->d_ioctl != NULL || dp->d_cioctl != NULL) &&
|
|
!strcmp(bp->bio_attribute, "GEOM::ioctl") &&
|
|
bp->bio_length == sizeof *gio) {
|
|
gio = (struct g_ioctl *)bp->bio_data;
|
|
if (dp->d_ioctl != NULL) {
|
|
gio->func = (d_ioctl_t *)(dp->d_ioctl);
|
|
gio->dev = dp;
|
|
} else {
|
|
gio->func = dp->d_cioctl;
|
|
gio->dev = dp->d_dev;
|
|
}
|
|
error = EDIRIOCTL;
|
|
} else
|
|
error = ENOIOCTL;
|
|
break;
|
|
case BIO_SETATTR:
|
|
if (!strcmp(bp->bio_attribute, "GEOM::ioctl") &&
|
|
bp->bio_length == sizeof *gio) {
|
|
gio = (struct g_ioctl *)bp->bio_data;
|
|
gio->func = devsw(dp->d_dev)->d_ioctl;
|
|
gio->dev = dp->d_dev;
|
|
error = EDIRIOCTL;
|
|
} else
|
|
error = ENOIOCTL;
|
|
break;
|
|
default:
|
|
error = EOPNOTSUPP;
|
|
break;
|
|
}
|
|
if (error != EJUSTRETURN)
|
|
g_io_deliver(bp, error);
|
|
return;
|
|
}
|
|
|
|
static void
|
|
g_disk_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, struct g_consumer *cp, struct g_provider *pp)
|
|
{
|
|
struct disk *dp;
|
|
|
|
dp = gp->softc;
|
|
if (indent == NULL) {
|
|
sbuf_printf(sb, " hd %u", dp->d_fwheads);
|
|
sbuf_printf(sb, " sc %u", dp->d_fwsectors);
|
|
return;
|
|
}
|
|
if (pp != NULL) {
|
|
sbuf_printf(sb, "%s<fwheads>%u</fwheads>\n",
|
|
indent, dp->d_fwheads);
|
|
sbuf_printf(sb, "%s<fwsectors>%u</fwsectors>\n",
|
|
indent, dp->d_fwsectors);
|
|
}
|
|
}
|
|
|
|
static void
|
|
g_disk_create(void *arg)
|
|
{
|
|
struct g_geom *gp;
|
|
struct g_provider *pp;
|
|
struct disk *dp;
|
|
|
|
g_topology_assert();
|
|
dp = arg;
|
|
gp = g_new_geomf(&g_disk_class, "%s%d", dp->d_name, dp->d_unit);
|
|
gp->start = g_disk_start;
|
|
gp->access = g_disk_access;
|
|
gp->softc = dp;
|
|
gp->dumpconf = g_disk_dumpconf;
|
|
dp->d_geom = gp;
|
|
pp = g_new_providerf(gp, "%s", gp->name);
|
|
pp->mediasize = dp->d_mediasize;
|
|
pp->sectorsize = dp->d_sectorsize;
|
|
if (dp->d_flags & DISKFLAG_CANDELETE)
|
|
pp->flags |= G_PF_CANDELETE;
|
|
pp->stripeoffset = dp->d_stripeoffset;
|
|
pp->stripesize = dp->d_stripesize;
|
|
g_error_provider(pp, 0);
|
|
if (bootverbose)
|
|
printf("GEOM: new disk %s\n", gp->name);
|
|
}
|
|
|
|
|
|
|
|
dev_t
|
|
disk_create(int unit, struct disk *dp, int flags, struct cdevsw *cdevsw, void * unused __unused)
|
|
{
|
|
dev_t dev;
|
|
|
|
dev = g_malloc(sizeof *dev, M_WAITOK | M_ZERO);
|
|
dp->d_unit = unit;
|
|
dp->d_dev = dev;
|
|
dp->d_flags = flags;
|
|
dp->d_devsw = cdevsw;
|
|
dev->si_devsw = cdevsw;
|
|
if (cdevsw != NULL) {
|
|
dp->d_copen = cdevsw->d_open;
|
|
dp->d_cclose = cdevsw->d_close;
|
|
dp->d_cioctl = cdevsw->d_ioctl;
|
|
dp->d_strategy = cdevsw->d_strategy;
|
|
dp->d_dump = cdevsw->d_dump;
|
|
dp->d_name = cdevsw->d_name;
|
|
}
|
|
KASSERT(dp->d_strategy != NULL, ("disk_create need d_strategy"));
|
|
KASSERT(dp->d_name != NULL, ("disk_create need d_name"));
|
|
KASSERT(*dp->d_name != 0, ("disk_create need d_name"));
|
|
KASSERT(strlen(dp->d_name) < SPECNAMELEN - 4, ("disk name too long"));
|
|
dev->si_disk = dp;
|
|
dev->si_udev = 0x10002; /* XXX: Needed ? */
|
|
dev->si_name = dev->__si_namebuf;
|
|
sprintf(dev->si_name, "%s%d", dp->d_name, unit);
|
|
g_call_me(g_disk_create, dp);
|
|
return (dev);
|
|
}
|
|
|
|
void
|
|
disk_destroy(struct disk *dp)
|
|
{
|
|
struct g_geom *gp;
|
|
|
|
gp = dp->d_geom;
|
|
g_free(dp->d_dev);
|
|
gp->flags |= G_GEOM_WITHER;
|
|
gp->softc = NULL;
|
|
g_orphan_provider(LIST_FIRST(&gp->provider), ENXIO);
|
|
}
|
|
|
|
static void
|
|
g_kern_disks(void *p)
|
|
{
|
|
struct sbuf *sb;
|
|
struct g_geom *gp;
|
|
char *sp;
|
|
|
|
sb = p;
|
|
sp = "";
|
|
g_topology_assert();
|
|
LIST_FOREACH(gp, &g_disk_class.geom, geom) {
|
|
sbuf_printf(sb, "%s%s", sp, gp->name);
|
|
sp = " ";
|
|
}
|
|
sbuf_finish(sb);
|
|
wakeup(sb);
|
|
}
|
|
|
|
static int
|
|
sysctl_disks(SYSCTL_HANDLER_ARGS)
|
|
{
|
|
int error;
|
|
struct sbuf *sb;
|
|
|
|
sb = sbuf_new(NULL, NULL, 0, SBUF_AUTOEXTEND);
|
|
sbuf_clear(sb);
|
|
g_call_me(g_kern_disks, sb);
|
|
do {
|
|
tsleep(sb, PZERO, "kern.disks", hz);
|
|
} while(!sbuf_done(sb));
|
|
error = SYSCTL_OUT(req, sbuf_data(sb), sbuf_len(sb) + 1);
|
|
sbuf_delete(sb);
|
|
return error;
|
|
}
|
|
|
|
SYSCTL_PROC(_kern, OID_AUTO, disks, CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_NOLOCK, 0, 0,
|
|
sysctl_disks, "A", "names of available disks");
|
|
|