/*- * 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: head/sys/geom/geom_disk.c 93778 2002-04-04 09:58:20Z phk $ */ #include "opt_geom.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include static g_access_t g_disk_access; struct g_class g_disk_class = { "DISK-class", NULL, NULL, G_CLASS_INITSTUFF }; 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; if ((pp->acr + pp->acw + pp->ace) == 0 && (r + w + e) > 0) { mtx_lock(&Giant); error = devsw(dev)->d_open(dev, 3, 0, NULL); if (error != 0) printf("Opened disk %s -> %d\n", pp->name, error); mtx_unlock(&Giant); } else if ((pp->acr + pp->acw + pp->ace) > 0 && (r + w + e) == 0) { mtx_lock(&Giant); error = devsw(dev)->d_close(dev, 3, 0, NULL); if (error != 0) printf("Closed disk %s -> %d\n", pp->name, error); mtx_unlock(&Giant); } else { error = 0; } pp->mediasize = dp->d_label.d_secsize * (off_t)dp->d_label.d_secperunit; return (error); } static void g_disk_done(struct bio *bp) { mtx_unlock(&Giant); bp->bio_completed = bp->bio_length - bp->bio_resid; g_std_done(bp); mtx_lock(&Giant); } static void g_disk_start(struct bio *bp) { struct bio *bp2; dev_t dev; struct disk *dp; struct g_ioctl *gio; int error; dp = bp->bio_to->geom->softc; dev = dp->d_dev; error = 0; switch(bp->bio_cmd) { case BIO_READ: case BIO_WRITE: bp2 = g_clone_bio(bp); bp2->bio_done = g_disk_done; bp2->bio_blkno = bp2->bio_offset >> DEV_BSHIFT; bp2->bio_pblkno = bp2->bio_blkno; bp2->bio_bcount = bp2->bio_length; bp2->bio_dev = dev; mtx_lock(&Giant); devsw(dev)->d_strategy(bp2); mtx_unlock(&Giant); break; case BIO_GETATTR: if (g_haveattr_int(bp, "GEOM::sectorsize", dp->d_label.d_secsize)) break; else if (g_haveattr_int(bp, "GEOM::fwsectors", dp->d_label.d_nsectors)) break; else if (g_haveattr_int(bp, "GEOM::fwheads", dp->d_label.d_ntracks)) break; else if (g_haveattr_int(bp, "GEOM::fwcylinders", dp->d_label.d_ncylinders)) break; else if (g_haveattr_off_t(bp, "GEOM::mediasize", dp->d_label.d_secsize * (off_t)dp->d_label.d_secperunit)) break; else if (!strcmp(bp->bio_attribute, "GEOM::ioctl") && bp->bio_length == sizeof *gio) { gio = (struct g_ioctl *)bp->bio_data; mtx_lock(&Giant); error = devsw(dev)->d_ioctl(dev, gio->cmd, gio->data, gio->fflag, gio->td); mtx_unlock(&Giant); } else error = ENOIOCTL; break; default: error = EOPNOTSUPP; break; } if (error) { bp->bio_error = error; g_io_deliver(bp); } return; } dev_t disk_create(int unit, struct disk *dp, int flags, struct cdevsw *cdevsw, struct cdevsw *proto) { static int once; struct g_geom *gp; struct g_provider *pp; dev_t dev; mtx_unlock(&Giant); if (!once) { g_add_class(&g_disk_class); once++; } dev = g_malloc(sizeof *dev, M_WAITOK | M_ZERO); dp->d_dev = dev; dp->d_devsw = cdevsw; dev->si_devsw = cdevsw; dev->si_disk = dp; dev->si_udev = dkmakeminor(unit, WHOLE_DISK_SLICE, RAW_PART); g_topology_lock(); gp = g_new_geomf(&g_disk_class, "%s%d", cdevsw->d_name, unit); gp->start = g_disk_start; gp->access = g_disk_access; gp->softc = dp; dp->d_softc = gp; pp = g_new_providerf(gp, "%s", gp->name); g_error_provider(pp, 0); g_topology_unlock(); mtx_lock(&Giant); return (dev); } void disk_dev_synth(dev_t dev); void disk_dev_synth(dev_t dev) { return; } void disk_destroy(dev_t dev) { struct disk *dp; struct g_geom *gp; dp = dev->si_disk; gp = dp->d_softc; g_free(dev); gp->flags |= G_GEOM_WITHER; g_orphan_provider(LIST_FIRST(&gp->provider), ENXIO); } void disk_invalidate (struct disk *disk) { } SYSCTL_INT(_debug_sizeof, OID_AUTO, disklabel, CTLFLAG_RD, 0, sizeof(struct disklabel), "sizeof(struct disklabel)"); SYSCTL_INT(_debug_sizeof, OID_AUTO, diskslices, CTLFLAG_RD, 0, sizeof(struct diskslices), "sizeof(struct diskslices)"); SYSCTL_INT(_debug_sizeof, OID_AUTO, disk, CTLFLAG_RD, 0, sizeof(struct disk), "sizeof(struct disk)");