Introduce STRIPE GEOM class. It implements RAID0 transformation and it
is intend to be fast. Just like CONCAT class it provides manual and auto configuration methods. Supported by: Wheel - Open Technologies - http://www.wheel.pl
This commit is contained in:
Pawel Jakub Dawidek
parent
4ca1698bb6
commit
b09121f9e1
900
sys/geom/stripe/g_stripe.c
Normal file
900
sys/geom/stripe/g_stripe.c
Normal file
@ -0,0 +1,900 @@
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/*-
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* Copyright (c) 2003 Pawel Jakub Dawidek <pjd@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/bio.h>
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#include <sys/sysctl.h>
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#include <sys/malloc.h>
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#include <geom/geom.h>
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#include <geom/stripe/g_stripe.h>
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static MALLOC_DEFINE(M_STRIPE, "stripe data", "GEOM_STRIPE Data");
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SYSCTL_DECL(_kern_geom);
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SYSCTL_NODE(_kern_geom, OID_AUTO, stripe, CTLFLAG_RW, 0, "GEOM_STRIPE stuff");
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static u_int g_stripe_debug = 0;
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SYSCTL_UINT(_kern_geom_stripe, OID_AUTO, debug, CTLFLAG_RW, &g_stripe_debug, 0,
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"Debug level");
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static int g_stripe_destroy(struct g_stripe_softc *sc, boolean_t force);
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static int g_stripe_destroy_geom(struct gctl_req *req, struct g_class *mp,
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struct g_geom *gp);
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static g_taste_t g_stripe_taste;
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static g_ctl_req_t g_stripe_config;
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static g_dumpconf_t g_stripe_dumpconf;
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struct g_class g_stripe_class = {
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.name = G_STRIPE_CLASS_NAME,
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.ctlreq = g_stripe_config,
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.taste = g_stripe_taste,
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.destroy_geom = g_stripe_destroy_geom
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};
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/*
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* Greatest Common Divisor.
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*/
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static u_int
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gcd(u_int a, u_int b)
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{
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u_int c;
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while (b != 0) {
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c = a;
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a = b;
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b = (c % b);
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}
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return (a);
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}
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/*
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* Least Common Multiple.
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*/
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static u_int
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lcm(u_int a, u_int b)
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{
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return ((a * b) / gcd(a, b));
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}
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/*
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* Return the number of valid disks.
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*/
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static u_int
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g_stripe_nvalid(struct g_stripe_softc *sc)
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{
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u_int i, no;
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no = 0;
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for (i = 0; i < sc->sc_ndisks; i++) {
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if (sc->sc_disks[i] != NULL)
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no++;
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}
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return (no);
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}
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static void
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g_stripe_remove_disk(struct g_consumer *cp)
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{
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struct g_stripe_softc *sc;
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u_int no;
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KASSERT(cp != NULL, ("Non-valid disk in %s.", __func__));
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sc = (struct g_stripe_softc *)cp->private;
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KASSERT(sc != NULL, ("NULL sc in %s.", __func__));
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no = cp->index;
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G_STRIPE_DEBUG(0, "Disk %s removed from %s.", cp->provider->name,
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sc->sc_geom->name);
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sc->sc_disks[no] = NULL;
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if (sc->sc_provider != NULL) {
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g_orphan_provider(sc->sc_provider, ENXIO);
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sc->sc_provider = NULL;
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G_STRIPE_DEBUG(0, "Device %s removed.", sc->sc_geom->name);
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}
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if (cp->acr > 0 || cp->acw > 0 || cp->ace > 0)
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g_access(cp, -cp->acr, -cp->acw, -cp->ace);
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g_detach(cp);
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g_destroy_consumer(cp);
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}
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static void
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g_stripe_orphan(struct g_consumer *cp)
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{
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struct g_stripe_softc *sc;
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struct g_geom *gp;
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g_topology_assert();
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gp = cp->geom;
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sc = gp->softc;
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if (sc == NULL)
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return;
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g_stripe_remove_disk(cp);
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/* If there are no valid disks anymore, remove device. */
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if (g_stripe_nvalid(sc) == 0)
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g_stripe_destroy(sc, 1);
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}
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static int
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g_stripe_access(struct g_provider *pp, int dr, int dw, int de)
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{
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struct g_consumer *cp1, *cp2;
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struct g_stripe_softc *sc;
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struct g_geom *gp;
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int error;
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gp = pp->geom;
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sc = gp->softc;
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if (sc == NULL) {
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/*
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* It looks like geom is being withered.
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* In that case we allow only negative requests.
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*/
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KASSERT(dr <= 0 && dw <= 0 && de <= 0,
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("Positive access request (device=%s).", pp->name));
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if ((pp->acr + dr) == 0 && (pp->acw + dw) == 0 &&
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(pp->ace + de) == 0) {
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G_STRIPE_DEBUG(0, "Device %s definitely destroyed.",
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gp->name);
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}
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return (0);
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}
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/* On first open, grab an extra "exclusive" bit */
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if (pp->acr == 0 && pp->acw == 0 && pp->ace == 0)
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de++;
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/* ... and let go of it on last close */
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if ((pp->acr + dr) == 0 && (pp->acw + dw) == 0 && (pp->ace + de) == 0)
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de--;
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error = ENXIO;
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LIST_FOREACH(cp1, &gp->consumer, consumer) {
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error = g_access(cp1, dr, dw, de);
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if (error == 0)
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continue;
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/*
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* If we fail here, backout all previous changes.
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*/
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LIST_FOREACH(cp2, &gp->consumer, consumer) {
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if (cp1 == cp2)
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return (error);
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g_access(cp2, -dr, -dw, -de);
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}
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/* NOTREACHED */
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}
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return (error);
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}
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static void
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g_stripe_start(struct bio *bp)
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{
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struct g_provider *pp;
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struct g_stripe_softc *sc;
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off_t off, start, length, nstripe;
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struct bio *cbp;
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u_int sectorsize;
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uint32_t stripesize;
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uint16_t no;
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char *addr;
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pp = bp->bio_to;
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sc = pp->geom->softc;
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/*
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* If sc == NULL, provider's error should be set and g_stripe_start()
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* should not be called at all.
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*/
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KASSERT(sc != NULL,
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("Provider's error should be set (error=%d)(device=%s).",
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bp->bio_to->error, bp->bio_to->name));
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G_STRIPE_LOGREQ(bp, "Request received.");
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switch (bp->bio_cmd) {
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case BIO_READ:
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case BIO_WRITE:
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case BIO_DELETE:
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/*
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* Only those requests are supported.
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*/
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break;
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case BIO_GETATTR:
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/* To which provider it should be delivered? */
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default:
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g_io_deliver(bp, EOPNOTSUPP);
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return;
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}
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addr = bp->bio_data;
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sectorsize = sc->sc_provider->sectorsize;
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stripesize = sc->sc_stripesize;
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/*
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* Calcucations are quite messy, but fast I hope.
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*/
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/* Stripe number. */
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/* nstripe = bp->bio_offset / stripesize; */
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nstripe = bp->bio_offset >> (off_t)sc->sc_stripebits;
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/* Disk number. */
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no = nstripe % sc->sc_ndisks;
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/* Start position in stripe. */
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/* start = bp->bio_offset % stripesize; */
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start = bp->bio_offset & (stripesize - 1);
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/* Start position in disk. */
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/* off = (nstripe / sc->sc_ndisks) * stripesize + start; */
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off = ((nstripe / sc->sc_ndisks) << sc->sc_stripebits) + start;
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/* Length of data to operate. */
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length = MIN(bp->bio_length, stripesize - start);
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cbp = g_clone_bio(bp);
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if (cbp == NULL) {
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/*
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* Deny all request. This is pointless
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* to split rest of the request, bacause
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* we're setting bio_error here, so all
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* request will be denied, anyway.
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*/
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bp->bio_completed = bp->bio_length;
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if (bp->bio_error == 0)
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bp->bio_error = ENOMEM;
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g_io_deliver(bp, bp->bio_error);
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return;
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}
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/*
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* Fill in the component buf structure.
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*/
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cbp->bio_done = g_std_done;
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cbp->bio_offset = off;
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cbp->bio_data = addr;
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cbp->bio_length = length;
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cbp->bio_to = sc->sc_disks[no]->provider;
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G_STRIPE_LOGREQ(cbp, "Sending request.");
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g_io_request(cbp, sc->sc_disks[no]);
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/* off -= off % stripesize; */
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off -= off & (stripesize - 1);
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addr += length;
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length = bp->bio_length - length;
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for (no++; length > 0; no++, length -= stripesize, addr += stripesize) {
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if (no > sc->sc_ndisks - 1) {
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no = 0;
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off += stripesize;
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}
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cbp = g_clone_bio(bp);
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if (cbp == NULL) {
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/*
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* Deny remaining part. This is pointless
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* to split rest of the request, bacause
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* we're setting bio_error here, so all
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* request will be denied, anyway.
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*/
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bp->bio_completed += length;
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if (bp->bio_error == 0)
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bp->bio_error = ENOMEM;
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if (bp->bio_completed == bp->bio_length)
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g_io_deliver(bp, bp->bio_error);
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return;
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}
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/*
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* Fill in the component buf structure.
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*/
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cbp->bio_done = g_std_done;
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cbp->bio_offset = off;
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cbp->bio_data = addr;
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/*
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* MIN() is in case when
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* (bp->bio_length % sc->sc_stripesize) != 0.
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*/
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cbp->bio_length = MIN(stripesize, length);
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cbp->bio_to = sc->sc_disks[no]->provider;
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G_STRIPE_LOGREQ(cbp, "Sending request.");
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g_io_request(cbp, sc->sc_disks[no]);
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}
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}
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static void
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g_stripe_check_and_run(struct g_stripe_softc *sc)
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{
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off_t mediasize, ms;
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u_int no, sectorsize = 0;
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if (g_stripe_nvalid(sc) != sc->sc_ndisks)
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return;
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sc->sc_provider = g_new_providerf(sc->sc_geom, "%s", sc->sc_geom->name);
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/*
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* Find the smallest disk.
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*/
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mediasize = sc->sc_disks[0]->provider->mediasize;
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if (sc->sc_type == G_STRIPE_TYPE_AUTOMATIC)
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mediasize -= sc->sc_disks[0]->provider->sectorsize;
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mediasize -= mediasize % sc->sc_stripesize;
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sectorsize = sc->sc_disks[0]->provider->sectorsize;
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for (no = 1; no < sc->sc_ndisks; no++) {
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ms = sc->sc_disks[no]->provider->mediasize;
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if (sc->sc_type == G_STRIPE_TYPE_AUTOMATIC)
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ms -= sc->sc_disks[no]->provider->sectorsize;
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ms -= ms % sc->sc_stripesize;
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if (ms < mediasize)
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mediasize = ms;
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sectorsize = lcm(sectorsize,
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sc->sc_disks[no]->provider->sectorsize);
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}
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sc->sc_provider->sectorsize = sectorsize;
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sc->sc_provider->mediasize = mediasize * sc->sc_ndisks;
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g_error_provider(sc->sc_provider, 0);
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G_STRIPE_DEBUG(0, "Device %s activated.", sc->sc_geom->name);
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}
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static int
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g_stripe_read_metadata(struct g_consumer *cp, struct g_stripe_metadata *md)
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{
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struct g_provider *pp;
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u_char *buf;
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int error;
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g_topology_assert();
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error = g_access(cp, 1, 0, 0);
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if (error != 0)
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return (error);
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pp = cp->provider;
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g_topology_unlock();
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buf = g_read_data(cp, pp->mediasize - pp->sectorsize, pp->sectorsize,
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&error);
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g_topology_lock();
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g_access(cp, -1, 0, 0);
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if (buf == NULL)
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return (error);
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/* Decode metadata. */
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stripe_metadata_decode(buf, md);
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g_free(buf);
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return (0);
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}
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/*
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* Add disk to given device.
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*/
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static int
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g_stripe_add_disk(struct g_stripe_softc *sc, struct g_provider *pp, u_int no)
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{
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struct g_consumer *cp, *fcp;
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struct g_geom *gp;
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int error;
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/* Metadata corrupted? */
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if (no >= sc->sc_ndisks)
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return (EINVAL);
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/* Check if disk is not already attached. */
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if (sc->sc_disks[no] != NULL)
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return (EEXIST);
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gp = sc->sc_geom;
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fcp = LIST_FIRST(&gp->consumer);
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cp = g_new_consumer(gp);
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error = g_attach(cp, pp);
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if (error != 0) {
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g_destroy_consumer(cp);
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return (error);
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}
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if (fcp != NULL && (fcp->acr > 0 || fcp->acw > 0 || fcp->ace > 0)) {
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error = g_access(cp, fcp->acr, fcp->acw, fcp->ace);
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if (error != 0) {
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g_detach(cp);
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g_destroy_consumer(cp);
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return (error);
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}
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}
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if (sc->sc_type == G_STRIPE_TYPE_AUTOMATIC) {
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struct g_stripe_metadata md;
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/* Reread metadata. */
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error = g_stripe_read_metadata(cp, &md);
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if (error != 0)
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goto fail;
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if (strcmp(md.md_magic, G_STRIPE_MAGIC) != 0 ||
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strcmp(md.md_name, sc->sc_name) != 0 ||
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md.md_id != sc->sc_id) {
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G_STRIPE_DEBUG(0, "Metadata on %s changed.", pp->name);
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goto fail;
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}
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}
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cp->private = sc;
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cp->index = no;
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sc->sc_disks[no] = cp;
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G_STRIPE_DEBUG(0, "Disk %s attached to %s.", pp->name, gp->name);
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g_stripe_check_and_run(sc);
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return (0);
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fail:
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if (fcp != NULL && (fcp->acr > 0 || fcp->acw > 0 || fcp->ace > 0))
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g_access(cp, -fcp->acr, -fcp->acw, -fcp->ace);
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g_detach(cp);
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g_destroy_consumer(cp);
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return (error);
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}
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static struct g_geom *
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g_stripe_create(struct g_class *mp, const struct g_stripe_metadata *md,
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u_int type)
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{
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struct g_stripe_softc *sc;
|
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struct g_geom *gp;
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u_int no;
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|
||||
G_STRIPE_DEBUG(1, "Creating device %s.stripe (id=%u).", md->md_name,
|
||||
md->md_id);
|
||||
|
||||
/* Two disks is minimum. */
|
||||
if (md->md_all <= 1) {
|
||||
G_STRIPE_DEBUG(0, "Too few disks defined for %s.stripe.",
|
||||
md->md_name);
|
||||
return (NULL);
|
||||
}
|
||||
#if 0
|
||||
/* Stripe size have to be grater than or equal to sector size. */
|
||||
if (md->md_stripesize < sectorsize) {
|
||||
G_STRIPE_DEBUG(0, "Invalid stripe size for %s.stripe.",
|
||||
md->md_name);
|
||||
return (NULL);
|
||||
}
|
||||
#endif
|
||||
/* Stripe size have to be power of 2. */
|
||||
if (!powerof2(md->md_stripesize)) {
|
||||
G_STRIPE_DEBUG(0, "Invalid stripe size for %s.stripe.",
|
||||
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_STRIPE_DEBUG(0, "Device %s already configured.",
|
||||
gp->name);
|
||||
return (NULL);
|
||||
}
|
||||
}
|
||||
gp = g_new_geomf(mp, "%s.stripe", md->md_name);
|
||||
gp->softc = NULL; /* for a moment */
|
||||
|
||||
sc = malloc(sizeof(*sc), M_STRIPE, M_NOWAIT | M_ZERO);
|
||||
if (sc == NULL) {
|
||||
G_STRIPE_DEBUG(0, "Can't allocate memory for device %s.",
|
||||
gp->name);
|
||||
g_destroy_geom(gp);
|
||||
return (NULL);
|
||||
}
|
||||
|
||||
gp->start = g_stripe_start;
|
||||
gp->spoiled = g_stripe_orphan;
|
||||
gp->orphan = g_stripe_orphan;
|
||||
gp->access = g_stripe_access;
|
||||
gp->dumpconf = g_stripe_dumpconf;
|
||||
|
||||
strlcpy(sc->sc_name, md->md_name, sizeof(sc->sc_name));
|
||||
sc->sc_id = md->md_id;
|
||||
sc->sc_stripesize = md->md_stripesize;
|
||||
sc->sc_stripebits = BITCOUNT(sc->sc_stripesize - 1);
|
||||
sc->sc_ndisks = md->md_all;
|
||||
sc->sc_disks = malloc(sizeof(struct g_consumer *) * sc->sc_ndisks,
|
||||
M_STRIPE, M_WAITOK | M_ZERO);
|
||||
for (no = 0; no < sc->sc_ndisks; no++)
|
||||
sc->sc_disks[no] = NULL;
|
||||
sc->sc_type = type;
|
||||
|
||||
gp->softc = sc;
|
||||
sc->sc_geom = gp;
|
||||
sc->sc_provider = NULL;
|
||||
|
||||
G_STRIPE_DEBUG(0, "Device %s created (id=%u).", gp->name, sc->sc_id);
|
||||
|
||||
return (gp);
|
||||
}
|
||||
|
||||
static int
|
||||
g_stripe_destroy(struct g_stripe_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_STRIPE_DEBUG(0, "Device %s is still open, so it "
|
||||
"can't be definitely removed.", pp->name);
|
||||
} else {
|
||||
G_STRIPE_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_stripe_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_STRIPE);
|
||||
free(sc, M_STRIPE);
|
||||
|
||||
pp = LIST_FIRST(&gp->provider);
|
||||
if (pp == NULL || (pp->acr == 0 && pp->acw == 0 && pp->ace == 0))
|
||||
G_STRIPE_DEBUG(0, "Device %s destroyed.", gp->name);
|
||||
|
||||
g_wither_geom(gp, ENXIO);
|
||||
|
||||
return (0);
|
||||
}
|
||||
|
||||
static int
|
||||
g_stripe_destroy_geom(struct gctl_req *req __unused,
|
||||
struct g_class *mp __unused, struct g_geom *gp)
|
||||
{
|
||||
struct g_stripe_softc *sc;
|
||||
|
||||
sc = gp->softc;
|
||||
return (g_stripe_destroy(sc, 0));
|
||||
}
|
||||
|
||||
static struct g_geom *
|
||||
g_stripe_taste(struct g_class *mp, struct g_provider *pp, int flags __unused)
|
||||
{
|
||||
struct g_stripe_metadata md;
|
||||
struct g_stripe_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_STRIPE_DEBUG(3, "Tasting %s.", pp->name);
|
||||
|
||||
gp = g_new_geomf(mp, "stripe:taste");
|
||||
gp->start = g_stripe_start;
|
||||
gp->access = g_stripe_access;
|
||||
gp->orphan = g_stripe_orphan;
|
||||
cp = g_new_consumer(gp);
|
||||
g_attach(cp, pp);
|
||||
|
||||
error = g_stripe_read_metadata(cp, &md);
|
||||
g_wither_geom(gp, ENXIO);
|
||||
if (error != 0)
|
||||
return (NULL);
|
||||
gp = NULL;
|
||||
|
||||
if (strcmp(md.md_magic, G_STRIPE_MAGIC) != 0)
|
||||
return (NULL);
|
||||
if (md.md_version > G_STRIPE_VERSION) {
|
||||
printf("geom_stripe.ko module is too old to handle %s.\n",
|
||||
pp->name);
|
||||
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 (sc->sc_type != G_STRIPE_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_STRIPE_DEBUG(1, "Adding disk %s to %s.", pp->name, gp->name);
|
||||
error = g_stripe_add_disk(sc, pp, md.md_no);
|
||||
if (error != 0) {
|
||||
G_STRIPE_DEBUG(0,
|
||||
"Cannot add disk %s to %s (error=%d).", pp->name,
|
||||
gp->name, error);
|
||||
return (NULL);
|
||||
}
|
||||
} else {
|
||||
gp = g_stripe_create(mp, &md, G_STRIPE_TYPE_AUTOMATIC);
|
||||
if (gp == NULL) {
|
||||
G_STRIPE_DEBUG(0, "Cannot create device %s.stripe.",
|
||||
md.md_name);
|
||||
return (NULL);
|
||||
}
|
||||
sc = gp->softc;
|
||||
G_STRIPE_DEBUG(1, "Adding disk %s to %s.", pp->name, gp->name);
|
||||
error = g_stripe_add_disk(sc, pp, md.md_no);
|
||||
if (error != 0) {
|
||||
G_STRIPE_DEBUG(0,
|
||||
"Cannot add disk %s to %s (error=%d).", pp->name,
|
||||
gp->name, error);
|
||||
g_stripe_destroy(sc, 1);
|
||||
return (NULL);
|
||||
}
|
||||
}
|
||||
|
||||
return (gp);
|
||||
}
|
||||
|
||||
static void
|
||||
g_stripe_ctl_create(struct gctl_req *req, struct g_class *mp)
|
||||
{
|
||||
u_int attached, no;
|
||||
struct g_stripe_metadata md;
|
||||
struct g_provider *pp;
|
||||
struct g_stripe_softc *sc;
|
||||
struct g_geom *gp;
|
||||
struct sbuf *sb;
|
||||
intmax_t *stripesize;
|
||||
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;
|
||||
}
|
||||
|
||||
strlcpy(md.md_magic, G_STRIPE_MAGIC, sizeof(md.md_magic));
|
||||
md.md_version = G_STRIPE_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;
|
||||
stripesize = gctl_get_paraml(req, "stripesize", sizeof(*stripesize));
|
||||
if (stripesize == NULL) {
|
||||
gctl_error(req, "No '%s' argument.", "stripesize");
|
||||
return;
|
||||
}
|
||||
md.md_stripesize = *stripesize;
|
||||
|
||||
/* Check all providers are valid */
|
||||
for (no = 1; no < *nargs; no++) {
|
||||
snprintf(param, sizeof(param), "arg%u", no);
|
||||
name = gctl_get_asciiparam(req, param);
|
||||
if (name == NULL) {
|
||||
gctl_error(req, "No 'arg%u' argument.", no);
|
||||
return;
|
||||
}
|
||||
if (strncmp(name, "/dev/", strlen("/dev/")) == 0)
|
||||
name += strlen("/dev/");
|
||||
pp = g_provider_by_name(name);
|
||||
if (pp == NULL) {
|
||||
G_STRIPE_DEBUG(1, "Disk %s is invalid.", name);
|
||||
gctl_error(req, "Disk %s is invalid.", name);
|
||||
return;
|
||||
}
|
||||
}
|
||||
|
||||
gp = g_stripe_create(mp, &md, G_STRIPE_TYPE_MANUAL);
|
||||
if (gp == NULL) {
|
||||
gctl_error(req, "Can't configure %s.stripe.", 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 = 0, no = 1; no < *nargs; no++) {
|
||||
snprintf(param, sizeof(param), "arg%u", no);
|
||||
name = gctl_get_asciiparam(req, param);
|
||||
if (strncmp(name, "/dev/", strlen("/dev/")) == 0)
|
||||
name += strlen("/dev/");
|
||||
pp = g_provider_by_name(name);
|
||||
KASSERT(pp != NULL, ("Provider %s disappear?!", name));
|
||||
if (g_stripe_add_disk(sc, pp, no - 1) != 0) {
|
||||
G_STRIPE_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_stripe_destroy(gp->softc, 1);
|
||||
gctl_error(req, "%s", sbuf_data(sb));
|
||||
}
|
||||
sbuf_delete(sb);
|
||||
}
|
||||
|
||||
static struct g_stripe_softc *
|
||||
g_stripe_find_device(struct g_class *mp, const char *name)
|
||||
{
|
||||
struct g_stripe_softc *sc;
|
||||
struct g_geom *gp;
|
||||
|
||||
LIST_FOREACH(gp, &mp->geom, geom) {
|
||||
sc = gp->softc;
|
||||
if (sc == NULL)
|
||||
continue;
|
||||
if (strcmp(gp->name, name) == 0 ||
|
||||
strcmp(sc->sc_name, name) == 0) {
|
||||
return (sc);
|
||||
}
|
||||
}
|
||||
return (NULL);
|
||||
}
|
||||
|
||||
static void
|
||||
g_stripe_ctl_destroy(struct gctl_req *req, struct g_class *mp)
|
||||
{
|
||||
struct g_stripe_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_stripe_find_device(mp, name);
|
||||
if (sc == NULL) {
|
||||
gctl_error(req, "No such device: %s.", name);
|
||||
return;
|
||||
}
|
||||
error = g_stripe_destroy(sc, *force);
|
||||
if (error != 0) {
|
||||
gctl_error(req, "Cannot destroy device %s (error=%d).",
|
||||
sc->sc_geom->name, error);
|
||||
return;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static void
|
||||
g_stripe_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_STRIPE_VERSION) {
|
||||
gctl_error(req, "Userland and kernel parts are out of sync.");
|
||||
return;
|
||||
}
|
||||
|
||||
if (strcmp(verb, "create") == 0) {
|
||||
g_stripe_ctl_create(req, mp);
|
||||
return;
|
||||
} else if (strcmp(verb, "destroy") == 0) {
|
||||
g_stripe_ctl_destroy(req, mp);
|
||||
return;
|
||||
}
|
||||
|
||||
gctl_error(req, "Unknown verb.");
|
||||
}
|
||||
|
||||
static void
|
||||
g_stripe_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp,
|
||||
struct g_consumer *cp, struct g_provider *pp)
|
||||
{
|
||||
struct g_stripe_softc *sc;
|
||||
|
||||
sc = gp->softc;
|
||||
if (sc == NULL)
|
||||
return;
|
||||
if (gp != NULL) {
|
||||
sbuf_printf(sb, "%s<id>%u</id>\n", indent, (u_int)sc->sc_id);
|
||||
sbuf_printf(sb, "%s<stripesize>%u</stripesize>\n", indent,
|
||||
(u_int)sc->sc_stripesize);
|
||||
switch (sc->sc_type) {
|
||||
case G_STRIPE_TYPE_AUTOMATIC:
|
||||
sbuf_printf(sb, "%s<type>%s</type>\n", indent,
|
||||
"automatic");
|
||||
break;
|
||||
case G_STRIPE_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_stripe_class, g_stripe);
|
||||
116
sys/geom/stripe/g_stripe.h
Normal file
116
sys/geom/stripe/g_stripe.h
Normal file
@ -0,0 +1,116 @@
|
||||
/*-
|
||||
* 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_STRIPE_H_
|
||||
#define _G_STRIPE_H_
|
||||
|
||||
#include <sys/endian.h>
|
||||
|
||||
#define G_STRIPE_CLASS_NAME "STRIPE"
|
||||
|
||||
#define G_STRIPE_MAGIC "GEOM::STRIPE"
|
||||
#define G_STRIPE_VERSION 0
|
||||
|
||||
#ifdef _KERNEL
|
||||
#define G_STRIPE_TYPE_MANUAL 0
|
||||
#define G_STRIPE_TYPE_AUTOMATIC 1
|
||||
|
||||
#define G_STRIPE_DEBUG(lvl, ...) do { \
|
||||
if (g_stripe_debug >= (lvl)) { \
|
||||
printf("GEOM_STRIPE"); \
|
||||
if (g_stripe_debug > 0) \
|
||||
printf("[%u]", lvl); \
|
||||
printf(": "); \
|
||||
printf(__VA_ARGS__); \
|
||||
printf("\n"); \
|
||||
} \
|
||||
} while (0)
|
||||
#define G_STRIPE_LOGREQ(bp, ...) do { \
|
||||
if (g_stripe_debug >= 2) { \
|
||||
printf("GEOM_STRIPE[2]: "); \
|
||||
printf(__VA_ARGS__); \
|
||||
printf(" "); \
|
||||
g_print_bio(bp); \
|
||||
printf("\n"); \
|
||||
} \
|
||||
} while (0)
|
||||
|
||||
struct g_stripe_softc {
|
||||
u_int sc_type; /* provider type */
|
||||
struct g_geom *sc_geom;
|
||||
struct g_provider *sc_provider;
|
||||
char sc_name[16]; /* stripe name */
|
||||
uint32_t sc_id; /* stripe unique ID */
|
||||
struct g_consumer **sc_disks;
|
||||
uint16_t sc_ndisks;
|
||||
uint32_t sc_stripesize;
|
||||
uint32_t sc_stripebits;
|
||||
};
|
||||
#endif /* _KERNEL */
|
||||
|
||||
struct g_stripe_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. */
|
||||
uint32_t md_stripesize; /* Stripe size. */
|
||||
};
|
||||
static __inline void
|
||||
stripe_metadata_encode(const struct g_stripe_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);
|
||||
le32enc(data + 44, md->md_stripesize);
|
||||
}
|
||||
static __inline void
|
||||
stripe_metadata_decode(const u_char *data, struct g_stripe_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);
|
||||
md->md_stripesize = le32dec(data + 44);
|
||||
}
|
||||
|
||||
#ifndef BITCOUNT
|
||||
#define BITCOUNT(x) (((BX_(x) + (BX_(x) >> 4)) & 0x0F0F0F0F) % 255)
|
||||
#define BX_(x) ((x) - (((x) >> 1) & 0x77777777) - \
|
||||
(((x) >> 2) & 0x33333333) - (((x) >> 3) & 0x11111111))
|
||||
#endif
|
||||
|
||||
#endif /* _G_STRIPE_H_ */
|
||||
Loading…
x
Reference in New Issue
Block a user