diff options
Diffstat (limited to 'sys/geom/shsec')
-rw-r--r-- | sys/geom/shsec/g_shsec.c | 822 | ||||
-rw-r--r-- | sys/geom/shsec/g_shsec.h | 113 |
2 files changed, 935 insertions, 0 deletions
diff --git a/sys/geom/shsec/g_shsec.c b/sys/geom/shsec/g_shsec.c new file mode 100644 index 0000000..b5b348a --- /dev/null +++ b/sys/geom/shsec/g_shsec.c @@ -0,0 +1,822 @@ +/*- + * Copyright (c) 2003 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/bio.h> +#include <sys/sysctl.h> +#include <sys/malloc.h> +#include <vm/uma.h> +#include <geom/geom.h> +#include <geom/shsec/g_shsec.h> + + +static MALLOC_DEFINE(M_SHSEC, "shsec data", "GEOM_SHSEC Data"); + +static uma_zone_t g_shsec_zone; + +static int g_shsec_destroy(struct g_shsec_softc *sc, boolean_t force); +static int g_shsec_destroy_geom(struct gctl_req *req, struct g_class *mp, + struct g_geom *gp); + +static g_taste_t g_shsec_taste; +static g_ctl_req_t g_shsec_config; +static g_dumpconf_t g_shsec_dumpconf; +static g_init_t g_shsec_init; +static g_fini_t g_shsec_fini; + +struct g_class g_shsec_class = { + .name = G_SHSEC_CLASS_NAME, + .version = G_VERSION, + .ctlreq = g_shsec_config, + .taste = g_shsec_taste, + .destroy_geom = g_shsec_destroy_geom, + .init = g_shsec_init, + .fini = g_shsec_fini +}; + +SYSCTL_DECL(_kern_geom); +SYSCTL_NODE(_kern_geom, OID_AUTO, shsec, CTLFLAG_RW, 0, "GEOM_SHSEC stuff"); +static u_int g_shsec_debug = 0; +TUNABLE_INT("kern.geom.shsec.debug", &g_shsec_debug); +SYSCTL_UINT(_kern_geom_shsec, OID_AUTO, debug, CTLFLAG_RW, &g_shsec_debug, 0, + "Debug level"); +static u_int g_shsec_maxmem = MAXPHYS * 100; +TUNABLE_INT("kern.geom.shsec.maxmem", &g_shsec_maxmem); +SYSCTL_UINT(_kern_geom_shsec, OID_AUTO, maxmem, CTLFLAG_RD, &g_shsec_maxmem, + 0, "Maximum memory that can be allocated for I/O (in bytes)"); +static u_int g_shsec_alloc_failed = 0; +SYSCTL_UINT(_kern_geom_shsec, OID_AUTO, alloc_failed, CTLFLAG_RD, + &g_shsec_alloc_failed, 0, "How many times I/O allocation failed"); + +/* + * 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)); +} + +static void +g_shsec_init(struct g_class *mp __unused) +{ + + g_shsec_zone = uma_zcreate("g_shsec_zone", MAXPHYS, NULL, NULL, NULL, + NULL, 0, 0); + g_shsec_maxmem -= g_shsec_maxmem % MAXPHYS; + uma_zone_set_max(g_shsec_zone, g_shsec_maxmem / MAXPHYS); +} + +static void +g_shsec_fini(struct g_class *mp __unused) +{ + + uma_zdestroy(g_shsec_zone); +} + +/* + * Return the number of valid disks. + */ +static u_int +g_shsec_nvalid(struct g_shsec_softc *sc) +{ + u_int i, no; + + no = 0; + for (i = 0; i < sc->sc_ndisks; i++) { + if (sc->sc_disks[i] != NULL) + no++; + } + + return (no); +} + +static void +g_shsec_remove_disk(struct g_consumer *cp) +{ + struct g_shsec_softc *sc; + u_int no; + + KASSERT(cp != NULL, ("Non-valid disk in %s.", __func__)); + sc = (struct g_shsec_softc *)cp->private; + KASSERT(sc != NULL, ("NULL sc in %s.", __func__)); + no = cp->index; + + G_SHSEC_DEBUG(0, "Disk %s removed from %s.", cp->provider->name, + sc->sc_name); + + sc->sc_disks[no] = NULL; + if (sc->sc_provider != NULL) { + g_orphan_provider(sc->sc_provider, ENXIO); + sc->sc_provider = NULL; + G_SHSEC_DEBUG(0, "Device %s removed.", sc->sc_name); + } + + if (cp->acr > 0 || cp->acw > 0 || cp->ace > 0) + g_access(cp, -cp->acr, -cp->acw, -cp->ace); + g_detach(cp); + g_destroy_consumer(cp); +} + +static void +g_shsec_orphan(struct g_consumer *cp) +{ + struct g_shsec_softc *sc; + struct g_geom *gp; + + g_topology_assert(); + gp = cp->geom; + sc = gp->softc; + if (sc == NULL) + return; + + g_shsec_remove_disk(cp); + /* If there are no valid disks anymore, remove device. */ + if (g_shsec_nvalid(sc) == 0) + g_shsec_destroy(sc, 1); +} + +static int +g_shsec_access(struct g_provider *pp, int dr, int dw, int de) +{ + struct g_consumer *cp1, *cp2; + struct g_shsec_softc *sc; + struct g_geom *gp; + int error; + + gp = pp->geom; + sc = gp->softc; + + if (sc == NULL) { + /* + * It looks like geom is being withered. + * In that case we allow only negative requests. + */ + KASSERT(dr <= 0 && dw <= 0 && de <= 0, + ("Positive access request (device=%s).", pp->name)); + if ((pp->acr + dr) == 0 && (pp->acw + dw) == 0 && + (pp->ace + de) == 0) { + G_SHSEC_DEBUG(0, "Device %s definitely destroyed.", + gp->name); + } + return (0); + } + + /* 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--; + + error = ENXIO; + LIST_FOREACH(cp1, &gp->consumer, consumer) { + error = g_access(cp1, dr, dw, de); + if (error == 0) + continue; + /* + * If we fail here, backout all previous changes. + */ + LIST_FOREACH(cp2, &gp->consumer, consumer) { + if (cp1 == cp2) + return (error); + g_access(cp2, -dr, -dw, -de); + } + /* NOTREACHED */ + } + + return (error); +} + +static void +g_shsec_xor1(uint32_t *src, uint32_t *dst, ssize_t len) +{ + + for (; len > 0; len -= sizeof(uint32_t), dst++) + *dst = *dst ^ *src++; + KASSERT(len == 0, ("len != 0 (len=%zd)", len)); +} + +static void +g_shsec_done(struct bio *bp) +{ + struct g_shsec_softc *sc; + struct bio *pbp; + + pbp = bp->bio_parent; + sc = pbp->bio_to->geom->softc; + if (bp->bio_error == 0) + G_SHSEC_LOGREQ(2, bp, "Request done."); + else { + G_SHSEC_LOGREQ(0, bp, "Request failed (error=%d).", + bp->bio_error); + if (pbp->bio_error == 0) + pbp->bio_error = bp->bio_error; + } + if (pbp->bio_cmd == BIO_READ) { + if ((pbp->bio_pflags & G_SHSEC_BFLAG_FIRST) != 0) { + bcopy(bp->bio_data, pbp->bio_data, pbp->bio_length); + pbp->bio_pflags = 0; + } else { + g_shsec_xor1((uint32_t *)bp->bio_data, + (uint32_t *)pbp->bio_data, + (ssize_t)pbp->bio_length); + } + } + bzero(bp->bio_data, bp->bio_length); + uma_zfree(g_shsec_zone, bp->bio_data); + g_destroy_bio(bp); + pbp->bio_inbed++; + if (pbp->bio_children == pbp->bio_inbed) { + pbp->bio_completed = pbp->bio_length; + g_io_deliver(pbp, pbp->bio_error); + } +} + +static void +g_shsec_xor2(uint32_t *rand, uint32_t *dst, ssize_t len) +{ + + for (; len > 0; len -= sizeof(uint32_t), dst++) { + *rand = arc4random(); + *dst = *dst ^ *rand++; + } + KASSERT(len == 0, ("len != 0 (len=%zd)", len)); +} + +static void +g_shsec_start(struct bio *bp) +{ + TAILQ_HEAD(, bio) queue = TAILQ_HEAD_INITIALIZER(queue); + struct g_shsec_softc *sc; + struct bio *cbp; + uint32_t *dst; + ssize_t len; + u_int no; + int error; + + sc = bp->bio_to->geom->softc; + /* + * If sc == NULL, provider's error should be set and g_shsec_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_SHSEC_LOGREQ(2, bp, "Request received."); + + switch (bp->bio_cmd) { + case BIO_READ: + case BIO_WRITE: + /* + * Only those requests are supported. + */ + break; + case BIO_DELETE: + case BIO_GETATTR: + /* To which provider it should be delivered? */ + default: + g_io_deliver(bp, EOPNOTSUPP); + return; + } + + /* + * Allocate all bios first and calculate XOR. + */ + dst = NULL; + len = bp->bio_length; + if (bp->bio_cmd == BIO_READ) + bp->bio_pflags = G_SHSEC_BFLAG_FIRST; + for (no = 0; no < sc->sc_ndisks; no++) { + cbp = g_clone_bio(bp); + if (cbp == NULL) { + error = ENOMEM; + goto failure; + } + TAILQ_INSERT_TAIL(&queue, cbp, bio_queue); + + /* + * Fill in the component buf structure. + */ + cbp->bio_done = g_shsec_done; + cbp->bio_data = uma_zalloc(g_shsec_zone, M_NOWAIT); + if (cbp->bio_data == NULL) { + g_shsec_alloc_failed++; + error = ENOMEM; + goto failure; + } + cbp->bio_caller2 = sc->sc_disks[no]; + if (bp->bio_cmd == BIO_WRITE) { + if (no == 0) { + dst = (uint32_t *)cbp->bio_data; + bcopy(bp->bio_data, dst, len); + } else { + g_shsec_xor2((uint32_t *)cbp->bio_data, dst, + len); + } + } + } + /* + * Fire off all allocated requests! + */ + while ((cbp = TAILQ_FIRST(&queue)) != NULL) { + struct g_consumer *cp; + + TAILQ_REMOVE(&queue, cbp, bio_queue); + cp = cbp->bio_caller2; + cbp->bio_caller2 = NULL; + cbp->bio_to = cp->provider; + G_SHSEC_LOGREQ(2, cbp, "Sending request."); + g_io_request(cbp, cp); + } + return; +failure: + while ((cbp = TAILQ_FIRST(&queue)) != NULL) { + TAILQ_REMOVE(&queue, cbp, bio_queue); + bp->bio_children--; + if (cbp->bio_data != NULL) { + bzero(cbp->bio_data, cbp->bio_length); + uma_zfree(g_shsec_zone, cbp->bio_data); + } + g_destroy_bio(cbp); + } + if (bp->bio_error == 0) + bp->bio_error = error; + g_io_deliver(bp, bp->bio_error); +} + +static void +g_shsec_check_and_run(struct g_shsec_softc *sc) +{ + off_t mediasize, ms; + u_int no, sectorsize = 0; + + if (g_shsec_nvalid(sc) != sc->sc_ndisks) + return; + + sc->sc_provider = g_new_providerf(sc->sc_geom, "shsec/%s", sc->sc_name); + /* + * Find the smallest disk. + */ + mediasize = sc->sc_disks[0]->provider->mediasize; + mediasize -= sc->sc_disks[0]->provider->sectorsize; + sectorsize = sc->sc_disks[0]->provider->sectorsize; + for (no = 1; no < sc->sc_ndisks; no++) { + ms = sc->sc_disks[no]->provider->mediasize; + ms -= sc->sc_disks[no]->provider->sectorsize; + if (ms < mediasize) + mediasize = ms; + sectorsize = lcm(sectorsize, + sc->sc_disks[no]->provider->sectorsize); + } + sc->sc_provider->sectorsize = sectorsize; + sc->sc_provider->mediasize = mediasize; + g_error_provider(sc->sc_provider, 0); + + G_SHSEC_DEBUG(0, "Device %s activated.", sc->sc_name); +} + +static int +g_shsec_read_metadata(struct g_consumer *cp, struct g_shsec_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. */ + shsec_metadata_decode(buf, md); + g_free(buf); + + return (0); +} + +/* + * Add disk to given device. + */ +static int +g_shsec_add_disk(struct g_shsec_softc *sc, struct g_provider *pp, u_int no) +{ + struct g_consumer *cp, *fcp; + struct g_geom *gp; + struct g_shsec_metadata md; + int error; + + /* Metadata corrupted? */ + if (no >= sc->sc_ndisks) + return (EINVAL); + + /* Check if disk is not already attached. */ + if (sc->sc_disks[no] != NULL) + return (EEXIST); + + gp = sc->sc_geom; + fcp = LIST_FIRST(&gp->consumer); + + cp = g_new_consumer(gp); + error = g_attach(cp, pp); + if (error != 0) { + 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) { + g_detach(cp); + g_destroy_consumer(cp); + return (error); + } + } + + /* Reread metadata. */ + error = g_shsec_read_metadata(cp, &md); + if (error != 0) + goto fail; + + if (strcmp(md.md_magic, G_SHSEC_MAGIC) != 0 || + strcmp(md.md_name, sc->sc_name) != 0 || md.md_id != sc->sc_id) { + G_SHSEC_DEBUG(0, "Metadata on %s changed.", pp->name); + goto fail; + } + + cp->private = sc; + cp->index = no; + sc->sc_disks[no] = cp; + + G_SHSEC_DEBUG(0, "Disk %s attached to %s.", pp->name, sc->sc_name); + + g_shsec_check_and_run(sc); + + return (0); +fail: + 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_shsec_create(struct g_class *mp, const struct g_shsec_metadata *md) +{ + struct g_shsec_softc *sc; + struct g_geom *gp; + u_int no; + + G_SHSEC_DEBUG(1, "Creating device %s (id=%u).", md->md_name, md->md_id); + + /* Two disks is minimum. */ + if (md->md_all < 2) { + G_SHSEC_DEBUG(0, "Too few disks defined for %s.", md->md_name); + 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_SHSEC_DEBUG(0, "Device %s already configured.", + sc->sc_name); + return (NULL); + } + } + gp = g_new_geomf(mp, "%s", md->md_name); + gp->softc = NULL; /* for a moment */ + + sc = malloc(sizeof(*sc), M_SHSEC, M_WAITOK | M_ZERO); + gp->start = g_shsec_start; + gp->spoiled = g_shsec_orphan; + gp->orphan = g_shsec_orphan; + gp->access = g_shsec_access; + gp->dumpconf = g_shsec_dumpconf; + + sc->sc_id = md->md_id; + sc->sc_ndisks = md->md_all; + sc->sc_disks = malloc(sizeof(struct g_consumer *) * sc->sc_ndisks, + M_SHSEC, M_WAITOK | M_ZERO); + for (no = 0; no < sc->sc_ndisks; no++) + sc->sc_disks[no] = NULL; + + gp->softc = sc; + sc->sc_geom = gp; + sc->sc_provider = NULL; + + G_SHSEC_DEBUG(0, "Device %s created (id=%u).", sc->sc_name, sc->sc_id); + + return (gp); +} + +static int +g_shsec_destroy(struct g_shsec_softc *sc, boolean_t force) +{ + struct g_provider *pp; + struct g_geom *gp; + u_int no; + + 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_SHSEC_DEBUG(0, "Device %s is still open, so it " + "can't be definitely removed.", pp->name); + } else { + G_SHSEC_DEBUG(1, + "Device %s is still open (r%dw%de%d).", pp->name, + pp->acr, pp->acw, pp->ace); + return (EBUSY); + } + } + + for (no = 0; no < sc->sc_ndisks; no++) { + if (sc->sc_disks[no] != NULL) + g_shsec_remove_disk(sc->sc_disks[no]); + } + + gp = sc->sc_geom; + gp->softc = NULL; + KASSERT(sc->sc_provider == NULL, ("Provider still exists? (device=%s)", + gp->name)); + free(sc->sc_disks, M_SHSEC); + free(sc, M_SHSEC); + + pp = LIST_FIRST(&gp->provider); + if (pp == NULL || (pp->acr == 0 && pp->acw == 0 && pp->ace == 0)) + G_SHSEC_DEBUG(0, "Device %s destroyed.", gp->name); + + g_wither_geom(gp, ENXIO); + + return (0); +} + +static int +g_shsec_destroy_geom(struct gctl_req *req __unused, struct g_class *mp __unused, + struct g_geom *gp) +{ + struct g_shsec_softc *sc; + + sc = gp->softc; + return (g_shsec_destroy(sc, 0)); +} + +static struct g_geom * +g_shsec_taste(struct g_class *mp, struct g_provider *pp, int flags __unused) +{ + struct g_shsec_metadata md; + struct g_shsec_softc *sc; + struct g_consumer *cp; + struct g_geom *gp; + int error; + + g_trace(G_T_TOPOLOGY, "%s(%s, %s)", __func__, mp->name, pp->name); + g_topology_assert(); + + G_SHSEC_DEBUG(3, "Tasting %s.", pp->name); + + gp = g_new_geomf(mp, "shsec:taste"); + gp->start = g_shsec_start; + gp->access = g_shsec_access; + gp->orphan = g_shsec_orphan; + cp = g_new_consumer(gp); + g_attach(cp, pp); + error = g_shsec_read_metadata(cp, &md); + g_detach(cp); + g_destroy_consumer(cp); + g_destroy_geom(gp); + if (error != 0) + return (NULL); + gp = NULL; + + if (strcmp(md.md_magic, G_SHSEC_MAGIC) != 0) + return (NULL); + if (md.md_version > G_SHSEC_VERSION) { + G_SHSEC_DEBUG(0, "Kernel module is too old to handle %s.\n", + pp->name); + return (NULL); + } + if (md.md_provider[0] != '\0' && strcmp(md.md_provider, pp->name) != 0) + return (NULL); + + /* + * Let's check if device already exists. + */ + sc = NULL; + LIST_FOREACH(gp, &mp->geom, geom) { + sc = gp->softc; + if (sc == NULL) + continue; + if (strcmp(md.md_name, sc->sc_name) != 0) + continue; + if (md.md_id != sc->sc_id) + continue; + break; + } + if (gp != NULL) { + G_SHSEC_DEBUG(1, "Adding disk %s to %s.", pp->name, gp->name); + error = g_shsec_add_disk(sc, pp, md.md_no); + if (error != 0) { + G_SHSEC_DEBUG(0, "Cannot add disk %s to %s (error=%d).", + pp->name, gp->name, error); + return (NULL); + } + } else { + gp = g_shsec_create(mp, &md); + if (gp == NULL) { + G_SHSEC_DEBUG(0, "Cannot create device %s.", md.md_name); + return (NULL); + } + sc = gp->softc; + G_SHSEC_DEBUG(1, "Adding disk %s to %s.", pp->name, gp->name); + error = g_shsec_add_disk(sc, pp, md.md_no); + if (error != 0) { + G_SHSEC_DEBUG(0, "Cannot add disk %s to %s (error=%d).", + pp->name, gp->name, error); + g_shsec_destroy(sc, 1); + return (NULL); + } + } + return (gp); +} + +static struct g_shsec_softc * +g_shsec_find_device(struct g_class *mp, const char *name) +{ + struct g_shsec_softc *sc; + struct g_geom *gp; + + 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_shsec_ctl_destroy(struct gctl_req *req, struct g_class *mp) +{ + struct g_shsec_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_shsec_find_device(mp, name); + if (sc == NULL) { + gctl_error(req, "No such device: %s.", name); + return; + } + error = g_shsec_destroy(sc, *force); + if (error != 0) { + gctl_error(req, "Cannot destroy device %s (error=%d).", + sc->sc_name, error); + return; + } + } +} + +static void +g_shsec_config(struct gctl_req *req, struct g_class *mp, const char *verb) +{ + uint32_t *version; + + 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_SHSEC_VERSION) { + gctl_error(req, "Userland and kernel parts are out of sync."); + return; + } + + if (strcmp(verb, "stop") == 0) { + g_shsec_ctl_destroy(req, mp); + return; + } + + gctl_error(req, "Unknown verb."); +} + +static void +g_shsec_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, + struct g_consumer *cp, struct g_provider *pp) +{ + struct g_shsec_softc *sc; + + sc = gp->softc; + if (sc == NULL) + return; + if (pp != NULL) { + /* Nothing here. */ + } else if (cp != NULL) { + sbuf_printf(sb, "%s<Number>%u</Number>\n", indent, + (u_int)cp->index); + } else { + sbuf_printf(sb, "%s<ID>%u</ID>\n", indent, (u_int)sc->sc_id); + sbuf_printf(sb, "%s<Status>Total=%u, Online=%u</Status>\n", + indent, sc->sc_ndisks, g_shsec_nvalid(sc)); + sbuf_printf(sb, "%s<State>", indent); + if (sc->sc_provider != NULL && sc->sc_provider->error == 0) + sbuf_printf(sb, "UP"); + else + sbuf_printf(sb, "DOWN"); + sbuf_printf(sb, "</State>\n"); + } +} + +DECLARE_GEOM_CLASS(g_shsec_class, g_shsec); diff --git a/sys/geom/shsec/g_shsec.h b/sys/geom/shsec/g_shsec.h new file mode 100644 index 0000000..5eb03ea --- /dev/null +++ b/sys/geom/shsec/g_shsec.h @@ -0,0 +1,113 @@ +/*- + * Copyright (c) 2003 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. + * + * $FreeBSD$ + */ + +#ifndef _G_SHSEC_H_ +#define _G_SHSEC_H_ + +#include <sys/endian.h> + +#define G_SHSEC_CLASS_NAME "SHSEC" + +#define G_SHSEC_MAGIC "GEOM::SHSEC" +/* + * Version history: + * 0 - Initial version number. + */ +#define G_SHSEC_VERSION 0 + +#ifdef _KERNEL +#define G_SHSEC_BFLAG_FIRST 0x1 + +#define G_SHSEC_DEBUG(lvl, ...) do { \ + if (g_shsec_debug >= (lvl)) { \ + printf("GEOM_SHSEC"); \ + if (g_shsec_debug > 0) \ + printf("[%u]", lvl); \ + printf(": "); \ + printf(__VA_ARGS__); \ + printf("\n"); \ + } \ +} while (0) +#define G_SHSEC_LOGREQ(lvl, bp, ...) do { \ + if (g_shsec_debug >= (lvl)) { \ + printf("GEOM_SHSEC"); \ + if (g_shsec_debug > 0) \ + printf("[%u]", lvl); \ + printf(": "); \ + printf(__VA_ARGS__); \ + printf(" "); \ + g_print_bio(bp); \ + printf("\n"); \ + } \ +} while (0) + +struct g_shsec_softc { + u_int sc_type; /* provider type */ + struct g_geom *sc_geom; + struct g_provider *sc_provider; + uint32_t sc_id; /* device unique ID */ + struct g_consumer **sc_disks; + uint16_t sc_ndisks; +}; +#define sc_name sc_geom->name +#endif /* _KERNEL */ + +struct g_shsec_metadata { + char md_magic[16]; /* Magic value. */ + uint32_t md_version; /* Version number. */ + char md_name[16]; /* Stripe name. */ + uint32_t md_id; /* Unique ID. */ + uint16_t md_no; /* Disk number. */ + uint16_t md_all; /* Number of all disks. */ + char md_provider[16]; /* Hardcoded provider. */ +}; +static __inline void +shsec_metadata_encode(const struct g_shsec_metadata *md, u_char *data) +{ + + bcopy(md->md_magic, data, sizeof(md->md_magic)); + le32enc(data + 16, md->md_version); + bcopy(md->md_name, data + 20, sizeof(md->md_name)); + le32enc(data + 36, md->md_id); + le16enc(data + 40, md->md_no); + le16enc(data + 42, md->md_all); + bcopy(md->md_provider, data + 44, sizeof(md->md_provider)); +} +static __inline void +shsec_metadata_decode(const u_char *data, struct g_shsec_metadata *md) +{ + + bcopy(data, md->md_magic, sizeof(md->md_magic)); + md->md_version = le32dec(data + 16); + bcopy(data + 20, md->md_name, sizeof(md->md_name)); + md->md_id = le32dec(data + 36); + md->md_no = le16dec(data + 40); + md->md_all = le16dec(data + 42); + bcopy(data + 44, md->md_provider, sizeof(md->md_provider)); +} +#endif /* _G_SHSEC_H_ */ |