/*- * SPDX-License-Identifier: BSD-2-Clause-FreeBSD * * Copyright (c) 2020 longpanda * Copyright (c) 2004-2005 Pawel Jakub Dawidek * 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 __FBSDID("$FreeBSD$"); #include #include #include #include #include #include #include #include #include #include #include #include #include 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%jd\n", indent, (intmax_t)disk->d_end); sbuf_printf(sb, "%s%jd\n", indent, (intmax_t)disk->d_start); } else { sbuf_printf(sb, "%s%u\n", indent, (u_int)sc->sc_id); sbuf_printf(sb, "%s", 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, "\n"); sbuf_printf(sb, "%sTotal=%u, Online=%u\n", indent, sc->sc_ndisks, g_ventoy_nvalid(sc)); sbuf_printf(sb, "%s", indent); if (sc->sc_provider != NULL && sc->sc_provider->error == 0) sbuf_cat(sb, "UP"); else sbuf_cat(sb, "DOWN"); sbuf_cat(sb, "\n"); } end: sx_sunlock(&sc->sc_disks_lock); } DECLARE_GEOM_CLASS(g_ventoy_class, g_ventoy); //MODULE_VERSION(geom_ventoy, 0);