diff options
Diffstat (limited to 'sys')
-rw-r--r-- | sys/geom/concat/g_concat.c | 749 | ||||
-rw-r--r-- | sys/geom/concat/g_concat.h | 113 |
2 files changed, 862 insertions, 0 deletions
diff --git a/sys/geom/concat/g_concat.c b/sys/geom/concat/g_concat.c new file mode 100644 index 0000000..ce62eda --- /dev/null +++ b/sys/geom/concat/g_concat.c @@ -0,0 +1,749 @@ +/*- + * 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 <geom/geom.h> +#include <geom/concat/g_concat.h> + + +static MALLOC_DEFINE(M_CONCAT, "concat data", "GEOM_CONCAT Data"); + +SYSCTL_NODE(_kern_geom, OID_AUTO, concat, CTLFLAG_RW, 0, "GEOM_CONCAT stuff"); +static u_int g_concat_debug = 0; +SYSCTL_UINT(_kern_geom_concat, OID_AUTO, debug, CTLFLAG_RW, &g_concat_debug, 0, + "Debug level"); + +static int g_concat_destroy(struct g_concat_softc *sc, boolean_t force); +static int g_concat_destroy_geom(struct gctl_req *req, struct g_class *mp, + struct g_geom *gp); + +static g_taste_t g_concat_taste; +static g_ctl_req_t g_concat_config; +static g_dumpconf_t g_concat_dumpconf; + +struct g_class g_concat_class = { + .name = G_CONCAT_CLASS_NAME, + .ctlreq = g_concat_config, + .taste = g_concat_taste, + .destroy_geom = g_concat_destroy_geom +}; + + +/* + * Return the number of valid disks. + */ +static u_int +g_concat_nvalid(struct g_concat_softc *sc) +{ + u_int i, no; + + no = 0; + for (i = 0; i < sc->sc_ndisks; i++) { + if (sc->sc_disks[i].d_valid) + no++; + } + + return (no); +} + +static void +g_concat_remove_disk(struct g_concat_disk *disk) +{ + struct g_consumer *cp; + struct g_concat_softc *sc; + + KASSERT(disk->d_valid, ("Non-valid disk in %s.", __func__)); + sc = disk->d_softc; + cp = disk->d_consumer; + + G_CONCAT_DEBUG(1, "Removing disk %s from %s.", cp->provider->name, + sc->sc_provider->name); + + disk->d_valid = 0; + + g_error_provider(sc->sc_provider, ENXIO); + + G_CONCAT_DEBUG(0, "Disk %s removed from %s.", cp->provider->name, + sc->sc_provider->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_concat_orphan(struct g_consumer *cp) +{ + struct g_concat_softc *sc; + struct g_concat_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_concat_remove_disk(disk); + + if (sc->sc_type == G_CONCAT_TYPE_MANUAL) { + /* + * For manually configured devices, don't remove provider + * even is there are no vaild disks at all. + */ + return; + } + + /* If there are no valid disks anymore, remove device. */ + if (g_concat_nvalid(sc) == 0) + g_concat_destroy(sc, 1); +} + +static int +g_concat_access(struct g_provider *pp, int dr, int dw, int de) +{ + struct g_consumer *cp1, *cp2; + struct g_concat_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_CONCAT_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) == 1) + 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_concat_start(struct bio *bp) +{ + struct g_concat_softc *sc; + struct g_concat_disk *disk; + struct g_provider *pp; + off_t offset, end, length, off, len; + struct bio *cbp; + char *addr; + u_int no; + + pp = bp->bio_to; + sc = pp->geom->softc; + /* + * If sc == NULL, provider's error should be set and g_concat_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_CONCAT_LOGREQ(bp, "Request received."); + + switch (bp->bio_cmd) { + case BIO_READ: + case BIO_WRITE: + case BIO_DELETE: + break; + case BIO_GETATTR: + /* To which provider it should be delivered? */ + default: + g_io_deliver(bp, EOPNOTSUPP); + return; + } + + offset = bp->bio_offset; + length = bp->bio_length; + addr = bp->bio_data; + end = offset + length; + + for (no = 0; no < sc->sc_ndisks; no++) { + disk = &sc->sc_disks[no]; + 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) { + if (bp->bio_error == 0) + bp->bio_error = ENOMEM; + return; + } + /* + * Fill in the component buf structure. + */ + cbp->bio_done = g_std_done; + cbp->bio_offset = off; + cbp->bio_data = addr; + addr += len; + cbp->bio_length = len; + cbp->bio_to = disk->d_consumer->provider; + G_CONCAT_LOGREQ(cbp, "Sending request."); + g_io_request(cbp, disk->d_consumer); + + 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)); +} + +static void +g_concat_check_and_run(struct g_concat_softc *sc) +{ + struct g_concat_disk *disk; + off_t start; + u_int no; + + if (g_concat_nvalid(sc) != sc->sc_ndisks) + return; + + start = 0; + for (no = 0; no < sc->sc_ndisks; no++) { + disk = &sc->sc_disks[no]; + disk->d_start = start; + disk->d_end = disk->d_start + + disk->d_consumer->provider->mediasize; + if (sc->sc_type == G_CONCAT_TYPE_AUTOMATIC) + disk->d_end -= disk->d_consumer->provider->sectorsize; + disk->d_length = disk->d_end - disk->d_start; + start = disk->d_end; + } + /* We have sc->sc_disks[sc->sc_ndisks - 1].d_end in 'start'. */ + sc->sc_provider->mediasize = start; + g_error_provider(sc->sc_provider, 0); + + G_CONCAT_DEBUG(0, "Device %s activated.", sc->sc_provider->name); +} + +static int +g_concat_read_metadata(struct g_consumer *cp, struct g_concat_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. */ + concat_metadata_decode(buf, md); + g_free(buf); + + return (0); +} + +/* + * Add disk to given device. + */ +static int +g_concat_add_disk(struct g_concat_softc *sc, struct g_provider *pp, u_int no) +{ + struct g_concat_disk *disk; + struct g_provider *ourpp; + struct g_consumer *cp; + struct g_geom *gp; + int error; + + /* Metadata corrupted? */ + if (no >= sc->sc_ndisks) + return (EINVAL); + + disk = &sc->sc_disks[no]; + /* Check if disk is not already attached. */ + if (disk->d_valid) + return (EEXIST); + + ourpp = sc->sc_provider; + gp = ourpp->geom; + + cp = g_new_consumer(gp); + error = g_attach(cp, pp); + if (error != 0) { + g_destroy_consumer(cp); + return (error); + } + + if (ourpp->acr > 0 || ourpp->acw > 0 || ourpp->ace > 0) { + error = g_access(cp, ourpp->acr, ourpp->acw, ourpp->ace); + if (error != 0) { + g_detach(cp); + g_destroy_consumer(cp); + return (error); + } + } + if (sc->sc_type == G_CONCAT_TYPE_AUTOMATIC) { + struct g_concat_metadata md; + + error = g_concat_read_metadata(cp, &md); + if (error != 0) + goto fail; + + if (strcmp(md.md_magic, G_CONCAT_MAGIC) != 0 || + strcmp(md.md_name, sc->sc_name) != 0 || + md.md_id != sc->sc_id) { + G_CONCAT_DEBUG(0, "Metadata on %s changed.", pp->name); + goto fail; + } + } + + 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_length = 0; /* not yet */ + disk->d_valid = 1; + + G_CONCAT_DEBUG(0, "Disk %s attached to %s.", pp->name, gp->name); + + g_concat_check_and_run(sc); + + return (0); +fail: + if (ourpp->acr > 0 || ourpp->acw > 0 || ourpp->ace > 0) + g_access(cp, -ourpp->acr, -ourpp->acw, -ourpp->ace); + g_detach(cp); + g_destroy_consumer(cp); + return (error); +} + +static struct g_geom * +g_concat_create(struct g_class *mp, const struct g_concat_metadata *md, + u_int type, size_t sectorsize) +{ + struct g_provider *pp; + struct g_concat_softc *sc; + struct g_geom *gp; + u_int no; + + G_CONCAT_DEBUG(1, "Creating device %s.concat (id=%u).", md->md_name, + md->md_id); + + /* Two 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_CONCAT_DEBUG(0, "Device %s already cofigured.", + gp->name); + return (NULL); + } + } + gp = g_new_geomf(mp, "%s.concat", md->md_name); + gp->softc = NULL; /* for a moment */ + + sc = malloc(sizeof(*sc), M_CONCAT, M_NOWAIT | M_ZERO); + if (sc == NULL) { + G_CONCAT_DEBUG(0, "Can't allocate memory for device %s.", + gp->name); + g_destroy_geom(gp); + return (NULL); + } + + gp->start = g_concat_start; + gp->spoiled = g_concat_orphan; + gp->orphan = g_concat_orphan; + gp->access = g_concat_access; + gp->dumpconf = g_concat_dumpconf; + + strlcpy(sc->sc_name, md->md_name, sizeof(sc->sc_name)); + sc->sc_id = md->md_id; + sc->sc_ndisks = md->md_all; + sc->sc_disks = malloc(sizeof(struct g_concat_disk) * sc->sc_ndisks, + M_CONCAT, M_WAITOK | M_ZERO); + for (no = 0; no < sc->sc_ndisks; no++) + sc->sc_disks[no].d_valid = 0; + sc->sc_type = type; + + gp->softc = sc; + + pp = g_new_providerf(gp, "%s", gp->name); + sc->sc_provider = pp; + pp->sectorsize = sectorsize; + /* + * Don't run provider yet (by setting its error to 0), because we're + * not aware of its mediasize. + */ + + G_CONCAT_DEBUG(0, "Device %s created (id=%u).", gp->name, sc->sc_id); + + return (gp); +} + +static int +g_concat_destroy(struct g_concat_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->acr != 0 || pp->acw != 0 || pp->ace != 0) { + if (force) { + G_CONCAT_DEBUG(0, "Device %s is still open, so it " + "can't be definitely removed.", + sc->sc_provider->name); + } else { + G_CONCAT_DEBUG(1, + "Device %s is still open (r%dw%de%d).", + sc->sc_provider->name, pp->acr, pp->acw, pp->ace); + return (EBUSY); + } + } + + g_error_provider(pp, ENXIO); + + for (no = 0; no < sc->sc_ndisks; no++) { + if (sc->sc_disks[no].d_valid) + g_concat_remove_disk(&sc->sc_disks[no]); + } + + if (pp->acr == 0 && pp->acw == 0 && pp->ace == 0) + G_CONCAT_DEBUG(0, "Device %s removed.", pp->name); + + gp = sc->sc_provider->geom; + gp->softc = NULL; + free(sc->sc_disks, M_CONCAT); + free(sc, M_CONCAT); + + g_wither_geom(gp, ENXIO); + + return (0); +} + +static int +g_concat_destroy_geom(struct gctl_req *req, struct g_class *mp, + struct g_geom *gp) +{ + struct g_concat_softc *sc; + + sc = gp->softc; + return (g_concat_destroy(sc, 0)); +} + +static struct g_geom * +g_concat_taste(struct g_class *mp, struct g_provider *pp, int flags __unused) +{ + struct g_concat_metadata md; + struct g_concat_softc *sc; + struct g_consumer *cp; + struct g_geom *gp; + int error; + + g_trace(G_T_TOPOLOGY, "g_concat_taste(%s, %s)", mp->name, pp->name); + g_topology_assert(); + + G_CONCAT_DEBUG(3, "Tasting %s.", pp->name); + + gp = g_new_geomf(mp, "concat:taste"); + gp->start = g_concat_start; + gp->access= g_concat_access; + cp = g_new_consumer(gp); + g_attach(cp, pp); + + error = g_concat_read_metadata(cp, &md); + if (error != 0) { + g_wither_geom(gp, ENXIO); + return (NULL); + } + g_wither_geom(gp, ENXIO); + gp = NULL; + + if (strcmp(md.md_magic, G_CONCAT_MAGIC) != 0) + return (NULL); + if (md.md_version > G_CONCAT_VERSION) { + printf("geom_concat.ko module is too old to handle %s.\n", + pp->name); + return (NULL); + } + + /* + * Let's check if device already exists. + */ + LIST_FOREACH(gp, &mp->geom, geom) { + sc = gp->softc; + if (sc == NULL) + continue; + if (sc->sc_type != G_CONCAT_TYPE_AUTOMATIC) + continue; + if (strcmp(md.md_name, sc->sc_name) != 0) + continue; + if (md.md_id != sc->sc_id) + continue; + break; + } + if (gp != NULL) { + G_CONCAT_DEBUG(1, "Adding disk %s to %s.", pp->name, gp->name); + error = g_concat_add_disk(sc, pp, md.md_no); + if (error != 0) { + G_CONCAT_DEBUG(0, "Cannot add disk %s to %s.", pp->name, + gp->name); + return (NULL); + } + } else { + gp = g_concat_create(mp, &md, G_CONCAT_TYPE_AUTOMATIC, + pp->sectorsize); + if (gp == NULL) { + G_CONCAT_DEBUG(0, "Cannot create device %s.concat.", + md.md_name); + return (NULL); + } + sc = gp->softc; + G_CONCAT_DEBUG(1, "Adding disk %s to %s.", pp->name, gp->name); + error = g_concat_add_disk(sc, pp, md.md_no); + if (error != 0) { + G_CONCAT_DEBUG(0, "Cannot add disk %s to %s.", pp->name, + gp->name); + g_concat_destroy(sc, 1); + return (NULL); + } + } + + return (gp); +} + +static void +g_concat_ctl_create(struct gctl_req *req, struct g_class *mp) +{ + u_int attached, no; + struct g_concat_metadata *md; + struct g_provider *pp; + struct g_concat_softc *sc; + struct g_geom *gp; + struct sbuf *sb; + uint32_t sectorsize = 0; + char buf[20]; + + g_topology_assert(); + md = gctl_get_paraml(req, "metadata", sizeof(*md)); + if (md == NULL) { + gctl_error(req, "No 'metadata' argument"); + return; + } + if (md->md_all <= 1) { + G_CONCAT_DEBUG(1, "Invalid 'md_all' value (= %d).", md->md_all); + gctl_error(req, "Invalid 'md_all' value (= %d).", md->md_all); + return; + } + + /* Check all providers are valid */ + for (no = 0; no < md->md_all; no++) { + snprintf(buf, sizeof(buf), "disk%u", no); + pp = gctl_get_provider(req, buf); + if (pp == NULL) { + G_CONCAT_DEBUG(1, "Disk %u is invalid.", no); + gctl_error(req, "Disk %u is invalid", no); + return; + } + if (no == 0) + sectorsize = pp->sectorsize; + } + + gp = g_concat_create(mp, md, G_CONCAT_TYPE_MANUAL, sectorsize); + if (gp == NULL) { + gctl_error(req, "Can't configure %s.concat", md->md_name); + return; + } + + sc = gp->softc; + sb = sbuf_new(NULL, NULL, 0, SBUF_AUTOEXTEND); + sbuf_printf(sb, "Can't attach disk(s) to %s:", gp->name); + for (attached = no = 0; no < md->md_all; no++) { + snprintf(buf, sizeof(buf), "disk%u", no); + pp = gctl_get_provider(req, buf); + if (g_concat_add_disk(sc, pp, no) != 0) { + G_CONCAT_DEBUG(1, "Disk %u (%s) not attached to %s.", + no + 1, pp->name, gp->name); + sbuf_printf(sb, " %s", pp->name); + continue; + } + attached++; + } + sbuf_finish(sb); + if (md->md_all != attached) { + g_concat_destroy(gp->softc, 1); + gctl_error(req, "%s", sbuf_data(sb)); + } + sbuf_delete(sb); +} + +static void +g_concat_ctl_destroy(struct gctl_req *req, struct g_geom *gp) +{ + struct g_concat_softc *sc; + int *force, error; + + g_topology_assert(); + force = gctl_get_paraml(req, "force", sizeof(*force)); + if (force == NULL) { + gctl_error(req, "No 'force' argument"); + return; + } + sc = gp->softc; + if (sc == NULL) { + gctl_error(req, "Cannot destroy device %s (not configured).", + gp->name); + return; + } + error = g_concat_destroy(sc, *force); + if (error != 0) { + gctl_error(req, "Cannot destroy device %s (error=%d).", + gp->name, error); + return; + } +} + +static void +g_concat_config(struct gctl_req *req, struct g_class *mp, const char *verb) +{ + struct g_geom *gp; + + g_topology_assert(); + + if (strcmp(verb, "create device") == 0) { + g_concat_ctl_create(req, mp); + return; + } + + gp = gctl_get_geom(req, mp, "geom"); + if (gp == NULL || gp->softc == NULL) { + gctl_error(req, "unknown device"); + return; + } + if (strcmp(verb, "destroy device") == 0) { + g_concat_ctl_destroy(req, gp); + return; + } + + gctl_error(req, "unknown verb"); +} + +static void +g_concat_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, + struct g_consumer *cp, struct g_provider *pp) +{ + struct g_concat_softc *sc; + + sc = gp->softc; + if (sc == NULL) + return; + if (gp != NULL) { + sbuf_printf(sb, "%s<id>%zu</id>\n", indent, sc->sc_id); + switch (sc->sc_type) { + case G_CONCAT_TYPE_AUTOMATIC: + sbuf_printf(sb, "%s<type>%s</type>\n", indent, + "automatic"); + break; + case G_CONCAT_TYPE_MANUAL: + sbuf_printf(sb, "%s<type>%s</type>\n", indent, + "manual"); + break; + default: + sbuf_printf(sb, "%s<type>%s</type>\n", indent, + "unknown"); + break; + } + } +} + +DECLARE_GEOM_CLASS(g_concat_class, g_concat); diff --git a/sys/geom/concat/g_concat.h b/sys/geom/concat/g_concat.h new file mode 100644 index 0000000..e073ccc --- /dev/null +++ b/sys/geom/concat/g_concat.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_CONCAT_H_ +#define _G_CONCAT_H_ + +#include <sys/endian.h> + +#define G_CONCAT_CLASS_NAME "CONCAT" + +#define G_CONCAT_MAGIC "GEOM::CONCAT" +#define G_CONCAT_VERSION 0 + +#ifdef _KERNEL +#define G_CONCAT_TYPE_MANUAL 0 +#define G_CONCAT_TYPE_AUTOMATIC 1 + +#define G_CONCAT_DEBUG(lvl, ...) do { \ + if (g_concat_debug >= (lvl)) { \ + printf("GEOM_CONCAT[%u]: ", lvl); \ + printf(__VA_ARGS__); \ + printf("\n"); \ + } \ +} while (0) +#define G_CONCAT_LOGREQ(bp, ...) do { \ + if (g_concat_debug >= 2) { \ + printf("GEOM_CONCAT[2]: "); \ + printf(__VA_ARGS__); \ + g_print_bio(bp); \ + printf("\n"); \ + } \ +} while (0) + +extern struct sysctl_oid_list sysctl__kern_geom_children; + +struct g_concat_disk { + struct g_consumer *d_consumer; + struct g_concat_softc *d_softc; + off_t d_start; + off_t d_end; + off_t d_length; + boolean_t d_valid; + LIST_ENTRY(g_concat_path) d_next; +}; + +struct g_concat_softc { + int sc_flags; /* flags */ + u_int sc_type; /* provider type */ + struct g_provider *sc_provider; + char sc_name[16]; /* concat name */ + uint32_t sc_id; /* concat unique ID */ + + struct g_concat_disk *sc_disks; + uint16_t sc_ndisks; +}; +#endif /* _KERNEL */ + +struct g_concat_metadata { + char md_magic[16]; /* Magic value. */ + uint32_t md_version; /* Version number. */ + char md_name[16]; /* Concat name. */ + uint32_t md_id; /* Unique ID. */ + uint16_t md_no; /* Disk number. */ + uint16_t md_all; /* Number of all disks. */ +}; +static __inline void +concat_metadata_encode(const struct g_concat_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); +} +static __inline void +concat_metadata_decode(const u_char *data, struct g_concat_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); +} +#endif /* _G_CONCAT_H_ */ |