--- /dev/null
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
+ * Copyright (c) 2020 longpanda <admin@ventoy.net>
+ * Copyright (c) 2004-2005 Pawel Jakub Dawidek <pjd@FreeBSD.org>
+ * 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.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/module.h>
+#include <sys/lock.h>
+#include <sys/mutex.h>
+#include <sys/sx.h>
+#include <sys/bio.h>
+#include <sys/sbuf.h>
+#include <sys/sysctl.h>
+#include <sys/malloc.h>
+#include <geom/geom.h>
+#include <geom/ventoy/g_ventoy.h>
+
+FEATURE(geom_ventoy, "GEOM ventoy support");
+
+static MALLOC_DEFINE(M_VENTOY, "ventoy_data", "GEOM_VENTOY Data");
+
+SYSCTL_DECL(_kern_geom);
+static SYSCTL_NODE(_kern_geom, OID_AUTO, ventoy, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
+ "GEOM_VENTOY stuff");
+static u_int g_ventoy_debug = 0;
+SYSCTL_UINT(_kern_geom_ventoy, OID_AUTO, debug, CTLFLAG_RWTUN, &g_ventoy_debug, 0,
+ "Debug level");
+
+extern int resource_string_value(const char *name, int unit, const char *resname, const char **result);
+extern int resource_int_value(const char *name, int unit, const char *resname, int *result);
+
+static int g_ventoy_destroy(struct g_ventoy_softc *sc, boolean_t force);
+static int g_ventoy_destroy_geom(struct gctl_req *req, struct g_class *mp,
+ struct g_geom *gp);
+
+static g_taste_t g_ventoy_taste;
+static g_ctl_req_t g_ventoy_config;
+static g_dumpconf_t g_ventoy_dumpconf;
+
+static char g_ventoy_disk_uuid[64];
+static bool g_ventoy_tasted = false;
+static off_t g_ventoy_disk_size = 0;
+static off_t g_disk_map_start = 0;
+static off_t g_disk_map_end = 0;
+static int g_ventoy_remount = 0;
+
+struct g_ventoy_map g_ventoy_map_data __attribute__((aligned (4096))) =
+{
+ { VENTOY_UNIX_SEG_MAGIC0, VENTOY_UNIX_SEG_MAGIC1, VENTOY_UNIX_SEG_MAGIC2, VENTOY_UNIX_SEG_MAGIC3 },
+ { 0, 0, 0, 0 },
+ 0, 0,
+ { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
+ { { 0, 0 } },
+ { VENTOY_UNIX_SEG_MAGIC0, VENTOY_UNIX_SEG_MAGIC1, VENTOY_UNIX_SEG_MAGIC2, VENTOY_UNIX_SEG_MAGIC3 }
+};
+
+struct g_class g_ventoy_class = {
+ .name = G_VENTOY_CLASS_NAME,
+ .version = G_VERSION,
+ .ctlreq = g_ventoy_config,
+ .taste = g_ventoy_taste,
+ .destroy_geom = g_ventoy_destroy_geom
+};
+
+
+/*
+ * Greatest Common Divisor.
+ */
+static u_int
+gcd(u_int a, u_int b)
+{
+ u_int c;
+
+ while (b != 0) {
+ c = a;
+ a = b;
+ b = (c % b);
+ }
+ return (a);
+}
+
+/*
+ * Least Common Multiple.
+ */
+static u_int
+lcm(u_int a, u_int b)
+{
+
+ return ((a * b) / gcd(a, b));
+}
+
+/*
+ * Return the number of valid disks.
+ */
+static u_int
+g_ventoy_nvalid(struct g_ventoy_softc *sc)
+{
+ u_int no;
+ struct g_ventoy_disk *disk;
+
+ sx_assert(&sc->sc_disks_lock, SA_LOCKED);
+
+ no = 0;
+ TAILQ_FOREACH(disk, &sc->sc_disks, d_next) {
+ if (disk->d_consumer != NULL)
+ no++;
+ }
+
+ return (no);
+}
+
+static void
+g_ventoy_remove_disk(struct g_ventoy_disk *disk)
+{
+ struct g_consumer *cp;
+ struct g_ventoy_softc *sc;
+
+ g_topology_assert();
+ KASSERT(disk->d_consumer != NULL, ("Non-valid disk in %s.", __func__));
+ sc = disk->d_softc;
+ cp = disk->d_consumer;
+
+ if (!disk->d_removed) {
+ G_VENTOY_DEBUG(0, "Disk %s removed from %s.",
+ cp->provider->name, sc->sc_name);
+ disk->d_removed = 1;
+ }
+
+ if (sc->sc_provider != NULL) {
+ G_VENTOY_DEBUG(0, "Device %s deactivated.",
+ sc->sc_provider->name);
+ g_wither_provider(sc->sc_provider, ENXIO);
+ sc->sc_provider = NULL;
+ }
+
+ if (cp->acr > 0 || cp->acw > 0 || cp->ace > 0)
+ return;
+ disk->d_consumer = NULL;
+ g_detach(cp);
+ g_destroy_consumer(cp);
+ /* If there are no valid disks anymore, remove device. */
+ if (LIST_EMPTY(&sc->sc_geom->consumer))
+ g_ventoy_destroy(sc, 1);
+}
+
+static void
+g_ventoy_orphan(struct g_consumer *cp)
+{
+ struct g_ventoy_softc *sc;
+ struct g_ventoy_disk *disk;
+ struct g_geom *gp;
+
+ g_topology_assert();
+ gp = cp->geom;
+ sc = gp->softc;
+ if (sc == NULL)
+ return;
+
+ disk = cp->private;
+ if (disk == NULL) /* Possible? */
+ return;
+ g_ventoy_remove_disk(disk);
+}
+
+static int
+g_ventoy_access(struct g_provider *pp, int dr, int dw, int de)
+{
+ struct g_consumer *cp1, *cp2, *tmp;
+ struct g_ventoy_disk *disk;
+ struct g_geom *gp;
+ struct g_ventoy_softc *sc;
+ int error;
+
+ if (dw > 0) /* readonly */
+ return (EPERM);
+
+ g_topology_assert();
+ gp = pp->geom;
+ sc = gp->softc;
+
+ if (g_ventoy_remount)
+ {
+ de = 0;
+ }
+ else
+ {
+ /* On first open, grab an extra "exclusive" bit */
+ if (pp->acr == 0 && pp->acw == 0 && pp->ace == 0)
+ de++;
+ /* ... and let go of it on last close */
+ if ((pp->acr + dr) == 0 && (pp->acw + dw) == 0 && (pp->ace + de) == 0)
+ de--;
+ }
+
+ sx_slock(&sc->sc_disks_lock);
+ LIST_FOREACH_SAFE(cp1, &gp->consumer, consumer, tmp) {
+ error = g_access(cp1, dr, dw, de);
+ if (error != 0)
+ goto fail;
+ disk = cp1->private;
+ if (cp1->acr == 0 && cp1->acw == 0 && cp1->ace == 0 &&
+ disk->d_removed) {
+ g_ventoy_remove_disk(disk); /* May destroy geom. */
+ }
+ }
+ sx_sunlock(&sc->sc_disks_lock);
+ return (0);
+
+fail:
+ sx_sunlock(&sc->sc_disks_lock);
+ LIST_FOREACH(cp2, &gp->consumer, consumer) {
+ if (cp1 == cp2)
+ break;
+ g_access(cp2, -dr, -dw, -de);
+ }
+ return (error);
+}
+
+static void
+g_ventoy_candelete(struct bio *bp)
+{
+ struct g_ventoy_softc *sc;
+ struct g_ventoy_disk *disk;
+ int val;
+
+ sc = bp->bio_to->geom->softc;
+ sx_assert(&sc->sc_disks_lock, SX_LOCKED);
+ TAILQ_FOREACH(disk, &sc->sc_disks, d_next) {
+ if (!disk->d_removed && disk->d_candelete)
+ break;
+ }
+ val = disk != NULL;
+ g_handleattr(bp, "GEOM::candelete", &val, sizeof(val));
+}
+
+static void
+g_ventoy_kernel_dump(struct bio *bp)
+{
+ struct g_ventoy_softc *sc;
+ struct g_ventoy_disk *disk;
+ struct bio *cbp;
+ struct g_kerneldump *gkd;
+
+ sc = bp->bio_to->geom->softc;
+ gkd = (struct g_kerneldump *)bp->bio_data;
+ TAILQ_FOREACH(disk, &sc->sc_disks, d_next) {
+ if (disk->d_start <= gkd->offset &&
+ disk->d_end > gkd->offset)
+ break;
+ }
+ if (disk == NULL) {
+ g_io_deliver(bp, EOPNOTSUPP);
+ return;
+ }
+
+ gkd->offset -= disk->d_start;
+ if (gkd->length > disk->d_end - disk->d_start - gkd->offset)
+ gkd->length = disk->d_end - disk->d_start - gkd->offset;
+ cbp = g_clone_bio(bp);
+ if (cbp == NULL) {
+ g_io_deliver(bp, ENOMEM);
+ return;
+ }
+ cbp->bio_done = g_std_done;
+ g_io_request(cbp, disk->d_consumer);
+ G_VENTOY_DEBUG(1, "Kernel dump will go to %s.",
+ disk->d_consumer->provider->name);
+}
+
+static void
+g_ventoy_done(struct bio *bp)
+{
+ struct g_ventoy_softc *sc;
+ struct bio *pbp;
+
+ pbp = bp->bio_parent;
+ sc = pbp->bio_to->geom->softc;
+ mtx_lock(&sc->sc_completion_lock);
+ if (pbp->bio_error == 0)
+ pbp->bio_error = bp->bio_error;
+ pbp->bio_completed += bp->bio_completed;
+ pbp->bio_inbed++;
+ if (pbp->bio_children == pbp->bio_inbed) {
+ mtx_unlock(&sc->sc_completion_lock);
+ g_io_deliver(pbp, pbp->bio_error);
+ } else
+ mtx_unlock(&sc->sc_completion_lock);
+ g_destroy_bio(bp);
+}
+
+static void
+g_ventoy_flush(struct g_ventoy_softc *sc, struct bio *bp)
+{
+ struct bio_queue_head queue;
+ struct g_consumer *cp;
+ struct bio *cbp;
+ struct g_ventoy_disk *disk;
+
+ sx_assert(&sc->sc_disks_lock, SX_LOCKED);
+
+ bioq_init(&queue);
+ TAILQ_FOREACH(disk, &sc->sc_disks, d_next) {
+ cbp = g_clone_bio(bp);
+ if (cbp == NULL) {
+ while ((cbp = bioq_takefirst(&queue)) != NULL)
+ g_destroy_bio(cbp);
+ if (bp->bio_error == 0)
+ bp->bio_error = ENOMEM;
+ g_io_deliver(bp, bp->bio_error);
+ return;
+ }
+ bioq_insert_tail(&queue, cbp);
+ cbp->bio_done = g_ventoy_done;
+ cbp->bio_caller1 = disk->d_consumer;
+ cbp->bio_to = disk->d_consumer->provider;
+ }
+ while ((cbp = bioq_takefirst(&queue)) != NULL) {
+ G_VENTOY_LOGREQ(cbp, "Sending request.");
+ cp = cbp->bio_caller1;
+ cbp->bio_caller1 = NULL;
+ g_io_request(cbp, cp);
+ }
+}
+
+static void
+g_ventoy_start(struct bio *bp)
+{
+ struct bio_queue_head queue;
+ struct g_ventoy_softc *sc;
+ struct g_ventoy_disk *disk;
+ struct g_provider *pp;
+ off_t offset, end, length, off, len;
+ struct bio *cbp;
+ char *addr;
+
+ pp = bp->bio_to;
+ sc = pp->geom->softc;
+ /*
+ * If sc == NULL, provider's error should be set and g_ventoy_start()
+ * should not be called at all.
+ */
+ KASSERT(sc != NULL,
+ ("Provider's error should be set (error=%d)(device=%s).",
+ bp->bio_to->error, bp->bio_to->name));
+
+ G_VENTOY_LOGREQ(bp, "Request received.");
+ sx_slock(&sc->sc_disks_lock);
+
+ switch (bp->bio_cmd) {
+ case BIO_READ:
+ case BIO_WRITE:
+ case BIO_DELETE:
+ break;
+ case BIO_SPEEDUP:
+ case BIO_FLUSH:
+ g_ventoy_flush(sc, bp);
+ goto end;
+ case BIO_GETATTR:
+ if (strcmp("GEOM::kerneldump", bp->bio_attribute) == 0) {
+ g_ventoy_kernel_dump(bp);
+ goto end;
+ } else if (strcmp("GEOM::candelete", bp->bio_attribute) == 0) {
+ g_ventoy_candelete(bp);
+ goto end;
+ }
+ /* To which provider it should be delivered? */
+ /* FALLTHROUGH */
+ default:
+ g_io_deliver(bp, EOPNOTSUPP);
+ goto end;
+ }
+
+ offset = bp->bio_offset;
+ length = bp->bio_length;
+ if ((bp->bio_flags & BIO_UNMAPPED) != 0)
+ addr = NULL;
+ else
+ addr = bp->bio_data;
+ end = offset + length;
+
+ bioq_init(&queue);
+ TAILQ_FOREACH(disk, &sc->sc_disks, d_next) {
+ if (disk->d_end <= offset)
+ continue;
+ if (disk->d_start >= end)
+ break;
+
+ off = offset - disk->d_start;
+ len = MIN(length, disk->d_end - offset);
+ length -= len;
+ offset += len;
+
+ cbp = g_clone_bio(bp);
+ if (cbp == NULL) {
+ while ((cbp = bioq_takefirst(&queue)) != NULL)
+ g_destroy_bio(cbp);
+ if (bp->bio_error == 0)
+ bp->bio_error = ENOMEM;
+ g_io_deliver(bp, bp->bio_error);
+ goto end;
+ }
+ bioq_insert_tail(&queue, cbp);
+ /*
+ * Fill in the component buf structure.
+ */
+ if (len == bp->bio_length)
+ cbp->bio_done = g_std_done;
+ else
+ cbp->bio_done = g_ventoy_done;
+ cbp->bio_offset = off + disk->d_map_start;
+ cbp->bio_length = len;
+ if ((bp->bio_flags & BIO_UNMAPPED) != 0) {
+ cbp->bio_ma_offset += (uintptr_t)addr;
+ cbp->bio_ma += cbp->bio_ma_offset / PAGE_SIZE;
+ cbp->bio_ma_offset %= PAGE_SIZE;
+ cbp->bio_ma_n = round_page(cbp->bio_ma_offset +
+ cbp->bio_length) / PAGE_SIZE;
+ } else
+ cbp->bio_data = addr;
+ addr += len;
+ cbp->bio_to = disk->d_consumer->provider;
+ cbp->bio_caller1 = disk;
+
+ if (length == 0)
+ break;
+ }
+ KASSERT(length == 0,
+ ("Length is still greater than 0 (class=%s, name=%s).",
+ bp->bio_to->geom->class->name, bp->bio_to->geom->name));
+ while ((cbp = bioq_takefirst(&queue)) != NULL) {
+ G_VENTOY_LOGREQ(cbp, "Sending request.");
+ disk = cbp->bio_caller1;
+ cbp->bio_caller1 = NULL;
+ g_io_request(cbp, disk->d_consumer);
+ }
+end:
+ sx_sunlock(&sc->sc_disks_lock);
+}
+
+static void
+g_ventoy_check_and_run(struct g_ventoy_softc *sc)
+{
+ struct g_ventoy_disk *disk;
+ struct g_provider *dp, *pp;
+ u_int sectorsize = 0;
+ off_t start;
+ int error;
+
+ g_topology_assert();
+ if (g_ventoy_nvalid(sc) != sc->sc_ndisks)
+ return;
+
+ pp = g_new_providerf(sc->sc_geom, "ventoy/%s", sc->sc_name);
+ pp->flags |= G_PF_DIRECT_SEND | G_PF_DIRECT_RECEIVE |
+ G_PF_ACCEPT_UNMAPPED;
+ start = 0;
+ TAILQ_FOREACH(disk, &sc->sc_disks, d_next) {
+ dp = disk->d_consumer->provider;
+ disk->d_start = start;
+ disk->d_end = disk->d_start + (disk->d_map_end - disk->d_map_start);
+ if (sc->sc_type == G_VENTOY_TYPE_AUTOMATIC)
+ disk->d_end -= dp->sectorsize;
+ start = disk->d_end;
+ error = g_access(disk->d_consumer, 1, 0, 0);
+ if (error == 0) {
+ error = g_getattr("GEOM::candelete", disk->d_consumer,
+ &disk->d_candelete);
+ if (error != 0)
+ disk->d_candelete = 0;
+ (void)g_access(disk->d_consumer, -1, 0, 0);
+ } else
+ G_VENTOY_DEBUG(1, "Failed to access disk %s, error %d.",
+ dp->name, error);
+ if (disk == TAILQ_FIRST(&sc->sc_disks))
+ sectorsize = dp->sectorsize;
+ else
+ sectorsize = lcm(sectorsize, dp->sectorsize);
+
+ /* A provider underneath us doesn't support unmapped */
+ if ((dp->flags & G_PF_ACCEPT_UNMAPPED) == 0) {
+ G_VENTOY_DEBUG(1, "Cancelling unmapped "
+ "because of %s.", dp->name);
+ pp->flags &= ~G_PF_ACCEPT_UNMAPPED;
+ }
+ }
+ pp->sectorsize = sectorsize;
+ /* We have sc->sc_disks[sc->sc_ndisks - 1].d_end in 'start'. */
+ pp->mediasize = start;
+ dp = TAILQ_FIRST(&sc->sc_disks)->d_consumer->provider;
+ pp->stripesize = dp->stripesize;
+ pp->stripeoffset = dp->stripeoffset;
+ sc->sc_provider = pp;
+ g_error_provider(pp, 0);
+
+ G_VENTOY_DEBUG(0, "Device %s activated.", sc->sc_provider->name);
+}
+
+static int
+g_ventoy_read_metadata(struct g_consumer *cp, struct g_ventoy_metadata *md)
+{
+ struct g_provider *pp;
+ u_char *buf;
+ int error;
+
+ g_topology_assert();
+
+ error = g_access(cp, 1, 0, 0);
+ if (error != 0)
+ return (error);
+ pp = cp->provider;
+ g_topology_unlock();
+ buf = g_read_data(cp, pp->mediasize - pp->sectorsize, pp->sectorsize,
+ &error);
+ g_topology_lock();
+ g_access(cp, -1, 0, 0);
+ if (buf == NULL)
+ return (error);
+
+ /* Decode metadata. */
+ ventoy_metadata_decode(buf, md);
+ g_free(buf);
+
+ return (0);
+}
+
+/*
+ * Add disk to given device.
+ */
+static int
+g_ventoy_add_disk(struct g_ventoy_softc *sc, struct g_provider *pp, u_int no)
+{
+ struct g_ventoy_disk *disk;
+ struct g_consumer *cp, *fcp;
+ struct g_geom *gp;
+ int error;
+
+ g_topology_assert();
+
+ sx_slock(&sc->sc_disks_lock);
+
+ /* Metadata corrupted? */
+ if (no >= sc->sc_ndisks) {
+ sx_sunlock(&sc->sc_disks_lock);
+ return (EINVAL);
+ }
+
+ for (disk = TAILQ_FIRST(&sc->sc_disks); no > 0; no--) {
+ disk = TAILQ_NEXT(disk, d_next);
+ }
+
+ /* Check if disk is not already attached. */
+ if (disk->d_consumer != NULL) {
+ sx_sunlock(&sc->sc_disks_lock);
+ return (EEXIST);
+ }
+
+ gp = sc->sc_geom;
+ fcp = LIST_FIRST(&gp->consumer);
+
+ cp = g_new_consumer(gp);
+ cp->flags |= G_CF_DIRECT_SEND | G_CF_DIRECT_RECEIVE;
+ error = g_attach(cp, pp);
+ if (error != 0) {
+ sx_sunlock(&sc->sc_disks_lock);
+ g_destroy_consumer(cp);
+ return (error);
+ }
+
+ if (fcp != NULL && (fcp->acr > 0 || fcp->acw > 0 || fcp->ace > 0)) {
+ error = g_access(cp, fcp->acr, fcp->acw, fcp->ace);
+ if (error != 0) {
+ sx_sunlock(&sc->sc_disks_lock);
+ g_detach(cp);
+ g_destroy_consumer(cp);
+ return (error);
+ }
+ }
+ if (sc->sc_type == G_VENTOY_TYPE_AUTOMATIC) {
+ struct g_ventoy_metadata md;
+
+ // temporarily give up the lock to avoid lock order violation
+ // due to topology unlock in g_concat_read_metadata
+ sx_sunlock(&sc->sc_disks_lock);
+ /* Re-read metadata. */
+ error = g_ventoy_read_metadata(cp, &md);
+ sx_slock(&sc->sc_disks_lock);
+
+ if (error != 0)
+ goto fail;
+
+ if (strcmp(md.md_magic, G_VENTOY_MAGIC) != 0 ||
+ strcmp(md.md_name, sc->sc_name) != 0 ||
+ md.md_id != sc->sc_id) {
+ G_VENTOY_DEBUG(0, "Metadata on %s changed.", pp->name);
+ goto fail;
+ }
+
+ disk->d_hardcoded = md.md_provider[0] != '\0';
+ } else {
+ disk->d_hardcoded = false;
+ }
+
+ cp->private = disk;
+ disk->d_consumer = cp;
+ disk->d_softc = sc;
+ disk->d_start = 0; /* not yet */
+ disk->d_end = 0; /* not yet */
+ disk->d_removed = 0;
+
+ disk->d_map_start = g_disk_map_start;
+ disk->d_map_end = g_disk_map_end;
+
+ G_VENTOY_DEBUG(0, "Disk %s attached to %s.", pp->name, sc->sc_name);
+
+ g_ventoy_check_and_run(sc);
+ sx_sunlock(&sc->sc_disks_lock); // need lock for check_and_run
+
+ return (0);
+fail:
+ sx_sunlock(&sc->sc_disks_lock); // need lock for check_and_run
+ if (fcp != NULL && (fcp->acr > 0 || fcp->acw > 0 || fcp->ace > 0))
+ g_access(cp, -fcp->acr, -fcp->acw, -fcp->ace);
+ g_detach(cp);
+ g_destroy_consumer(cp);
+ return (error);
+}
+
+static struct g_geom *
+g_ventoy_create(struct g_class *mp, const struct g_ventoy_metadata *md,
+ u_int type)
+{
+ struct g_ventoy_softc *sc;
+ struct g_ventoy_disk *disk;
+ struct g_geom *gp;
+ u_int no;
+
+ G_VENTOY_DEBUG(1, "Creating device %s (id=%u).", md->md_name,
+ md->md_id);
+
+ /* One disks is minimum. */
+ if (md->md_all < 1)
+ return (NULL);
+
+ /* Check for duplicate unit */
+ LIST_FOREACH(gp, &mp->geom, geom) {
+ sc = gp->softc;
+ if (sc != NULL && strcmp(sc->sc_name, md->md_name) == 0) {
+ G_VENTOY_DEBUG(0, "Device %s already configured.",
+ gp->name);
+ return (NULL);
+ }
+ }
+ gp = g_new_geomf(mp, "%s", md->md_name);
+ sc = malloc(sizeof(*sc), M_VENTOY, M_WAITOK | M_ZERO);
+ gp->start = g_ventoy_start;
+ gp->spoiled = g_ventoy_orphan;
+ gp->orphan = g_ventoy_orphan;
+ gp->access = g_ventoy_access;
+ gp->dumpconf = g_ventoy_dumpconf;
+
+ sc->sc_id = md->md_id;
+ sc->sc_ndisks = md->md_all;
+ TAILQ_INIT(&sc->sc_disks);
+ for (no = 0; no < sc->sc_ndisks; no++) {
+ disk = malloc(sizeof(*disk), M_VENTOY, M_WAITOK | M_ZERO);
+ TAILQ_INSERT_TAIL(&sc->sc_disks, disk, d_next);
+ }
+ sc->sc_type = type;
+ mtx_init(&sc->sc_completion_lock, "gventoy lock", NULL, MTX_DEF);
+ sx_init(&sc->sc_disks_lock, "gventoy append lock");
+
+ gp->softc = sc;
+ sc->sc_geom = gp;
+ sc->sc_provider = NULL;
+
+ G_VENTOY_DEBUG(0, "Device %s created (id=%u).", sc->sc_name, sc->sc_id);
+
+ return (gp);
+}
+
+static int
+g_ventoy_destroy(struct g_ventoy_softc *sc, boolean_t force)
+{
+ struct g_provider *pp;
+ struct g_consumer *cp, *cp1;
+ struct g_geom *gp;
+ struct g_ventoy_disk *disk;
+
+ g_topology_assert();
+
+ if (sc == NULL)
+ return (ENXIO);
+
+ pp = sc->sc_provider;
+ if (pp != NULL && (pp->acr != 0 || pp->acw != 0 || pp->ace != 0)) {
+ if (force) {
+ G_VENTOY_DEBUG(0, "Device %s is still open, so it "
+ "can't be definitely removed.", pp->name);
+ } else {
+ G_VENTOY_DEBUG(1,
+ "Device %s is still open (r%dw%de%d).", pp->name,
+ pp->acr, pp->acw, pp->ace);
+ return (EBUSY);
+ }
+ }
+
+ gp = sc->sc_geom;
+ LIST_FOREACH_SAFE(cp, &gp->consumer, consumer, cp1) {
+ g_ventoy_remove_disk(cp->private);
+ if (cp1 == NULL)
+ return (0); /* Recursion happened. */
+ }
+ if (!LIST_EMPTY(&gp->consumer))
+ return (EINPROGRESS);
+
+ gp->softc = NULL;
+ KASSERT(sc->sc_provider == NULL, ("Provider still exists? (device=%s)",
+ gp->name));
+ while ((disk = TAILQ_FIRST(&sc->sc_disks)) != NULL) {
+ TAILQ_REMOVE(&sc->sc_disks, disk, d_next);
+ free(disk, M_VENTOY);
+ }
+ mtx_destroy(&sc->sc_completion_lock);
+ sx_destroy(&sc->sc_disks_lock);
+ free(sc, M_VENTOY);
+
+ G_VENTOY_DEBUG(0, "Device %s destroyed.", gp->name);
+ g_wither_geom(gp, ENXIO);
+ return (0);
+}
+
+static int
+g_ventoy_destroy_geom(struct gctl_req *req __unused,
+ struct g_class *mp __unused, struct g_geom *gp)
+{
+ struct g_ventoy_softc *sc;
+
+ sc = gp->softc;
+ return (g_ventoy_destroy(sc, 0));
+}
+
+static bool g_vtoy_check_disk(struct g_class *mp, struct g_provider *pp)
+{
+ int i;
+ int vlnk = 0;
+ bool ret = true;
+ uint8_t *buf;
+ char uuid[64];
+ const char *value;
+ struct g_consumer *cp;
+ struct g_geom *gp;
+ uint8_t mbrdata[] = {
+ 0xEB, 0x63, 0x90, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x56, 0x54, 0x00, 0x47, 0x65, 0x00, 0x48, 0x44, 0x00, 0x52, 0x64, 0x00, 0x20, 0x45, 0x72, 0x0D,
+ };
+
+ if (g_ventoy_disk_size == 0)
+ {
+ if (VENTOY_MAP_VALID(g_ventoy_map_data.magic2))
+ {
+ G_DEBUG("ventoy map data is valid. [OK]\n");
+
+ for (i = 0; i < 16; i++)
+ {
+ sprintf(uuid + i * 2, "%02x", g_ventoy_map_data.diskuuid[i]);
+ }
+ snprintf(g_ventoy_disk_uuid, sizeof(g_ventoy_disk_uuid), "%s", uuid);
+ g_ventoy_disk_size = g_ventoy_map_data.disksize;
+
+ G_DEBUG("ventoy.disksize: %llu\n", (unsigned long long)g_ventoy_disk_size);
+ G_DEBUG("ventoy.diskuuid: <%s>\n", g_ventoy_disk_uuid);
+ }
+ else
+ {
+ G_DEBUG("ventoy map data is invalid, get from resource\n");
+
+ if (resource_string_value("ventoy", 0, "disksize", &value) == 0)
+ {
+ G_DEBUG("ventoy.disksize: %s\n", value);
+ g_ventoy_disk_size = strtouq(value, NULL, 0);
+ }
+
+ if (resource_string_value("ventoy", 0, "diskuuid", &value) == 0)
+ {
+ snprintf(g_ventoy_disk_uuid, sizeof(g_ventoy_disk_uuid), "%s", value);
+ G_DEBUG("ventoy.diskuuid: <%s>\n", value);
+ }
+ }
+ }
+
+ if (g_ventoy_disk_size != pp->mediasize)
+ {
+ return false;
+ }
+
+ if (strncmp(pp->name, "cd", 2) == 0 || strchr(pp->name, '/'))
+ {
+ return false;
+ }
+
+ /* read UUID from disk */
+ gp = g_new_geomf(mp, "ventoy:taste");
+ gp->start = NULL;
+ gp->access = g_ventoy_access;
+ gp->orphan = g_ventoy_orphan;
+ cp = g_new_consumer(gp);
+ cp->flags |= G_CF_DIRECT_SEND | G_CF_DIRECT_RECEIVE;
+ g_attach(cp, pp);
+
+ g_access(cp, 1, 0, 0);
+ g_topology_unlock();
+ buf = g_read_data(cp, 0, pp->sectorsize, NULL);
+ g_topology_lock();
+ g_access(cp, -1, 0, 0);
+
+ g_detach(cp);
+ g_destroy_consumer(cp);
+ g_destroy_geom(gp);
+ gp = NULL;
+
+ if (!buf)
+ {
+ return false;
+ }
+
+ for (i = 0; i < 16; i++)
+ {
+ sprintf(uuid + i * 2, "%02x", buf[0x180 + i]);
+ }
+
+ if (strncmp(g_ventoy_disk_uuid, uuid, 32))
+ {
+ ret = false;
+ }
+
+ if (resource_int_value("ventoy", 0, "vlnk", &vlnk) || (vlnk != 1))
+ {
+ if (memcmp(mbrdata, buf, 0x30) || memcmp(mbrdata + 0x30, buf + 0x190, 16))
+ {
+ ret = false;
+ }
+ }
+
+ g_free(buf);
+
+ if (ret)
+ {
+ G_DEBUG("ventoy disk check OK\n");
+ }
+
+ return ret;
+}
+
+static struct g_geom *
+g_ventoy_taste(struct g_class *mp, struct g_provider *pp, int flags __unused)
+{
+ int i;
+ int error;
+ int disknum;
+ int remount = 0;
+ char *endpos;
+ const char *value;
+ const char *alias = NULL;
+ struct g_geom *gp;
+ struct g_ventoy_metadata md;
+ struct g_ventoy_softc *sc;
+
+ if (g_ventoy_tasted)
+ {
+ return NULL;
+ }
+
+ G_DEBUG("%s(%s, %s)\n", __func__, mp->name, pp->name);
+ g_topology_assert();
+
+ /* Skip providers that are already open for writing. */
+ if (pp->acw > 0)
+ return (NULL);
+
+ if (!g_vtoy_check_disk(mp, pp))
+ {
+ return NULL;
+ }
+
+ g_ventoy_tasted = true;
+
+ G_DEBUG("###### ventoy disk <%s> ######\n", pp->name);
+
+ /* hint.ventoy.0.remount=1 */
+ if (resource_int_value("ventoy", 0, "remount", &remount) == 0 && remount == 1)
+ {
+ g_ventoy_remount = 1;
+ G_DEBUG("###### ventoy remount enabled ######\n");
+ }
+
+ /* hint.ventoy.0.alias=xxx */
+ if (resource_string_value("ventoy", 0, "alias", &alias) == 0)
+ {
+ G_DEBUG("###### ventoy alias <%s> ######\n", alias);
+ }
+ else
+ {
+ alias = NULL;
+ }
+
+ if (VENTOY_MAP_VALID(g_ventoy_map_data.magic2))
+ {
+ disknum = (int)g_ventoy_map_data.segnum;
+ G_DEBUG("segnum from map data is:<%d>\n", disknum);
+ }
+ else
+ {
+ resource_int_value("ventoy", 0, "segnum", &disknum);
+ G_DEBUG("segnum from resource is:<%d>\n", disknum);
+ }
+
+ strlcpy(md.md_magic, G_VENTOY_MAGIC, sizeof(md.md_magic));
+ md.md_version = G_VENTOY_VERSION;
+ strlcpy(md.md_name, "IMAGE", sizeof(md.md_name));
+ md.md_id = arc4random();
+ md.md_no = 0;
+ md.md_all = (uint16_t)disknum;
+ bzero(md.md_provider, sizeof(md.md_provider));
+ /* This field is not important here. */
+ md.md_provsize = 0;
+
+ gp = g_ventoy_create(mp, &md, G_VENTOY_TYPE_MANUAL);
+ if (gp == NULL) {
+ G_VENTOY_DEBUG(0, "Cannot create device %s.",
+ md.md_name);
+ return (NULL);
+ }
+ sc = gp->softc;
+
+ for (i = 0; i < disknum; i ++)
+ {
+ if (VENTOY_MAP_VALID(g_ventoy_map_data.magic2))
+ {
+ G_DEBUG("[map] ventoy segment%d: 0x%llx@0x%llx\n", i,
+ (long long)g_ventoy_map_data.seglist[i].seg_start_bytes,
+ (long long)g_ventoy_map_data.seglist[i].seg_end_bytes);
+
+ g_disk_map_start = (off_t)g_ventoy_map_data.seglist[i].seg_start_bytes;
+ g_disk_map_end = (off_t)g_ventoy_map_data.seglist[i].seg_end_bytes;
+ }
+ else
+ {
+ if (resource_string_value("ventoy", i, "seg", &value) == 0)
+ {
+ g_disk_map_start = strtouq(value, &endpos, 0);
+ g_disk_map_end = strtouq(endpos + 1, NULL, 0);
+ }
+ else
+ {
+ printf("Failed to parse ventoy seg %d\n", i);
+ continue;
+ }
+ G_DEBUG("[resource] ventoy segment%d: %s\n", i, value);
+ }
+
+ G_VENTOY_DEBUG(1, "Adding disk %s to %s.", pp->name, gp->name);
+ error = g_ventoy_add_disk(sc, pp, i);
+ if (error != 0) {
+ G_VENTOY_DEBUG(0,
+ "Cannot add disk %s to %s (error=%d).", pp->name,
+ gp->name, error);
+ g_ventoy_destroy(sc, 1);
+ return (NULL);
+ }
+
+ g_disk_map_start = 0;
+ g_disk_map_end = 0;
+ }
+
+ if (alias && sc && sc->sc_provider)
+ {
+ g_provider_add_alias(sc->sc_provider, "%s", alias);
+ }
+
+ return (gp);
+}
+
+static void
+g_ventoy_ctl_create(struct gctl_req *req, struct g_class *mp)
+{
+ u_int attached, no;
+ struct g_ventoy_metadata md;
+ struct g_provider *pp;
+ struct g_ventoy_softc *sc;
+ struct g_geom *gp;
+ struct sbuf *sb;
+ const char *name;
+ char param[16];
+ int *nargs;
+
+ g_topology_assert();
+ nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs));
+ if (nargs == NULL) {
+ gctl_error(req, "No '%s' argument.", "nargs");
+ return;
+ }
+ if (*nargs < 2) {
+ gctl_error(req, "Too few arguments.");
+ return;
+ }
+
+ bzero(&md, sizeof(md));
+ strlcpy(md.md_magic, G_VENTOY_MAGIC, sizeof(md.md_magic));
+ md.md_version = G_VENTOY_VERSION;
+ name = gctl_get_asciiparam(req, "arg0");
+ if (name == NULL) {
+ gctl_error(req, "No 'arg%u' argument.", 0);
+ return;
+ }
+ strlcpy(md.md_name, name, sizeof(md.md_name));
+ md.md_id = arc4random();
+ md.md_no = 0;
+ md.md_all = *nargs - 1;
+ /* This field is not important here. */
+ md.md_provsize = 0;
+
+ /* Check all providers are valid */
+ for (no = 1; no < *nargs; no++) {
+ snprintf(param, sizeof(param), "arg%u", no);
+ pp = gctl_get_provider(req, param);
+ if (pp == NULL)
+ return;
+ }
+
+ gp = g_ventoy_create(mp, &md, G_VENTOY_TYPE_MANUAL);
+ if (gp == NULL) {
+ gctl_error(req, "Can't configure %s.", md.md_name);
+ return;
+ }
+
+ sc = gp->softc;
+ sb = sbuf_new_auto();
+ sbuf_printf(sb, "Can't attach disk(s) to %s:", gp->name);
+ for (attached = 0, no = 1; no < *nargs; no++) {
+ snprintf(param, sizeof(param), "arg%u", no);
+ pp = gctl_get_provider(req, param);
+ if (pp == NULL) {
+ name = gctl_get_asciiparam(req, param);
+ MPASS(name != NULL);
+ sbuf_printf(sb, " %s", name);
+ continue;
+ }
+ if (g_ventoy_add_disk(sc, pp, no - 1) != 0) {
+ G_VENTOY_DEBUG(1, "Disk %u (%s) not attached to %s.",
+ no, pp->name, gp->name);
+ sbuf_printf(sb, " %s", pp->name);
+ continue;
+ }
+ attached++;
+ }
+ sbuf_finish(sb);
+ if (md.md_all != attached) {
+ g_ventoy_destroy(gp->softc, 1);
+ gctl_error(req, "%s", sbuf_data(sb));
+ }
+ sbuf_delete(sb);
+}
+
+static struct g_ventoy_softc *
+g_ventoy_find_device(struct g_class *mp, const char *name)
+{
+ struct g_ventoy_softc *sc;
+ struct g_geom *gp;
+
+ if (strncmp(name, _PATH_DEV, strlen(_PATH_DEV)) == 0)
+ name += strlen(_PATH_DEV);
+
+ LIST_FOREACH(gp, &mp->geom, geom) {
+ sc = gp->softc;
+ if (sc == NULL)
+ continue;
+ if (strcmp(sc->sc_name, name) == 0)
+ return (sc);
+ }
+ return (NULL);
+}
+
+static void
+g_ventoy_ctl_destroy(struct gctl_req *req, struct g_class *mp)
+{
+ struct g_ventoy_softc *sc;
+ int *force, *nargs, error;
+ const char *name;
+ char param[16];
+ u_int i;
+
+ g_topology_assert();
+
+ nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs));
+ if (nargs == NULL) {
+ gctl_error(req, "No '%s' argument.", "nargs");
+ return;
+ }
+ if (*nargs <= 0) {
+ gctl_error(req, "Missing device(s).");
+ return;
+ }
+ force = gctl_get_paraml(req, "force", sizeof(*force));
+ if (force == NULL) {
+ gctl_error(req, "No '%s' argument.", "force");
+ return;
+ }
+
+ for (i = 0; i < (u_int)*nargs; i++) {
+ snprintf(param, sizeof(param), "arg%u", i);
+ name = gctl_get_asciiparam(req, param);
+ if (name == NULL) {
+ gctl_error(req, "No 'arg%u' argument.", i);
+ return;
+ }
+ sc = g_ventoy_find_device(mp, name);
+ if (sc == NULL) {
+ gctl_error(req, "No such device: %s.", name);
+ return;
+ }
+ error = g_ventoy_destroy(sc, *force);
+ if (error != 0) {
+ gctl_error(req, "Cannot destroy device %s (error=%d).",
+ sc->sc_name, error);
+ return;
+ }
+ }
+}
+
+static void
+g_ventoy_config(struct gctl_req *req, struct g_class *mp, const char *verb)
+{
+ uint32_t *version;
+
+ return;
+
+ g_topology_assert();
+
+ version = gctl_get_paraml(req, "version", sizeof(*version));
+ if (version == NULL) {
+ gctl_error(req, "No '%s' argument.", "version");
+ return;
+ }
+ if (*version != G_VENTOY_VERSION) {
+ gctl_error(req, "Userland and kernel parts are out of sync.");
+ return;
+ }
+
+ if (strcmp(verb, "create") == 0) {
+ g_ventoy_ctl_create(req, mp);
+ return;
+ } else if (strcmp(verb, "destroy") == 0 ||
+ strcmp(verb, "stop") == 0) {
+ g_ventoy_ctl_destroy(req, mp);
+ return;
+ }
+ gctl_error(req, "Unknown verb.");
+}
+
+static void
+g_ventoy_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp,
+ struct g_consumer *cp, struct g_provider *pp)
+{
+ struct g_ventoy_softc *sc;
+
+ g_topology_assert();
+ sc = gp->softc;
+ if (sc == NULL)
+ return;
+ sx_slock(&sc->sc_disks_lock);
+ if (pp != NULL) {
+ /* Nothing here. */
+ } else if (cp != NULL) {
+ struct g_ventoy_disk *disk;
+
+ disk = cp->private;
+ if (disk == NULL)
+ goto end;
+ sbuf_printf(sb, "%s<End>%jd</End>\n", indent,
+ (intmax_t)disk->d_end);
+ sbuf_printf(sb, "%s<Start>%jd</Start>\n", indent,
+ (intmax_t)disk->d_start);
+ } else {
+ sbuf_printf(sb, "%s<ID>%u</ID>\n", indent, (u_int)sc->sc_id);
+ sbuf_printf(sb, "%s<Type>", indent);
+ switch (sc->sc_type) {
+ case G_VENTOY_TYPE_AUTOMATIC:
+ sbuf_cat(sb, "AUTOMATIC");
+ break;
+ case G_VENTOY_TYPE_MANUAL:
+ sbuf_cat(sb, "MANUAL");
+ break;
+ default:
+ sbuf_cat(sb, "UNKNOWN");
+ break;
+ }
+ sbuf_cat(sb, "</Type>\n");
+ sbuf_printf(sb, "%s<Status>Total=%u, Online=%u</Status>\n",
+ indent, sc->sc_ndisks, g_ventoy_nvalid(sc));
+ sbuf_printf(sb, "%s<State>", indent);
+ if (sc->sc_provider != NULL && sc->sc_provider->error == 0)
+ sbuf_cat(sb, "UP");
+ else
+ sbuf_cat(sb, "DOWN");
+ sbuf_cat(sb, "</State>\n");
+ }
+end:
+ sx_sunlock(&sc->sc_disks_lock);
+}
+
+DECLARE_GEOM_CLASS(g_ventoy_class, g_ventoy);
+//MODULE_VERSION(geom_ventoy, 0);
projects / Ventoy.git / commitdiff