fa4a1febf7
features. The gmirror(8) utility should be used for control of this class. There is no manual page yet, but I'm working on it with keramida@. Many useful tests provided by: simon (thank you!) Some ideas from: scottl, simon, phk
618 lines
16 KiB
C
618 lines
16 KiB
C
/*-
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* Copyright (c) 2004 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 <sys/bitstring.h>
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#include <vm/uma.h>
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#include <machine/atomic.h>
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#include <geom/geom.h>
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#include <sys/proc.h>
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#include <sys/kthread.h>
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#include <geom/mirror/g_mirror.h>
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static struct g_mirror_softc *
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g_mirror_find_device(struct g_class *mp, const char *name)
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{
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struct g_mirror_softc *sc;
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struct g_geom *gp;
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g_topology_assert();
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LIST_FOREACH(gp, &mp->geom, geom) {
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sc = gp->softc;
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if (sc == NULL)
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continue;
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if ((sc->sc_flags & G_MIRROR_DEVICE_FLAG_DESTROY) != 0)
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continue;
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if (strcmp(gp->name, name) == 0 ||
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strcmp(sc->sc_name, name) == 0) {
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return (sc);
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}
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}
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return (NULL);
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}
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static struct g_mirror_disk *
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g_mirror_find_disk(struct g_mirror_softc *sc, const char *name)
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{
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struct g_mirror_disk *disk;
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g_topology_assert();
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LIST_FOREACH(disk, &sc->sc_disks, d_next) {
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if (disk->d_consumer == NULL)
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continue;
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if (disk->d_consumer->provider == NULL)
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continue;
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if (strcmp(disk->d_consumer->provider->name, name) == 0)
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return (disk);
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}
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return (NULL);
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}
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static void
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g_mirror_ctl_configure(struct gctl_req *req, struct g_class *mp)
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{
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struct g_mirror_softc *sc;
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struct g_mirror_disk *disk;
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const char *name, *balancep;
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intmax_t *slicep;
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uint32_t slice;
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uint8_t balance;
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int *nargs, *autosync, *noautosync, do_sync = 0;
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g_topology_assert();
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nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs));
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if (*nargs != 1) {
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gctl_error(req, "Invalid number of arguments.");
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return;
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}
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name = gctl_get_asciiparam(req, "arg0");
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sc = g_mirror_find_device(mp, name);
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if (sc == NULL) {
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gctl_error(req, "No such device: %s.", name);
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return;
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}
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if (g_mirror_ndisks(sc, -1) < sc->sc_ndisks) {
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gctl_error(req, "Not all disks connected.");
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return;
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}
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balancep = gctl_get_asciiparam(req, "balance");
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if (strcmp(balancep, "none") == 0)
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balance = sc->sc_balance;
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else {
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if (balance_id(balancep) == -1) {
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gctl_error(req, "Invalid balance algorithm.");
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return;
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}
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balance = balance_id(balancep);
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}
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slicep = gctl_get_paraml(req, "slice", sizeof(*slicep));
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if (*slicep == -1)
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slice = sc->sc_slice;
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else
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slice = *slicep;
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autosync = gctl_get_paraml(req, "autosync", sizeof(*autosync));
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if (autosync == NULL) {
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gctl_error(req, "No '%s' argument.", "autosync");
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return;
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}
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noautosync = gctl_get_paraml(req, "noautosync", sizeof(*noautosync));
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if (noautosync == NULL) {
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gctl_error(req, "No '%s' argument.", "noautosync");
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return;
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}
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if (sc->sc_balance == balance && sc->sc_slice == slice && !*autosync &&
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!*noautosync) {
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gctl_error(req, "Nothing has changed.");
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return;
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}
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if (*autosync && *noautosync) {
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gctl_error(req, "'%s' and '%s' specified.", "autosync",
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"noautosync");
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return;
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}
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sc->sc_balance = balance;
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sc->sc_slice = slice;
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if ((sc->sc_flags & G_MIRROR_DEVICE_FLAG_NOAUTOSYNC) != 0) {
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if (*autosync) {
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sc->sc_flags &= ~G_MIRROR_DEVICE_FLAG_NOAUTOSYNC;
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do_sync = 1;
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}
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} else {
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if (*noautosync)
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sc->sc_flags |= G_MIRROR_DEVICE_FLAG_NOAUTOSYNC;
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}
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LIST_FOREACH(disk, &sc->sc_disks, d_next) {
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if (do_sync) {
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if (disk->d_state == G_MIRROR_DISK_STATE_SYNCHRONIZING)
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disk->d_flags &= ~G_MIRROR_DISK_FLAG_FORCE_SYNC;
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}
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g_mirror_update_metadata(disk);
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if (do_sync) {
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if (disk->d_state == G_MIRROR_DISK_STATE_STALE) {
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g_mirror_event_send(disk,
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G_MIRROR_DISK_STATE_DISCONNECTED,
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G_MIRROR_EVENT_DONTWAIT);
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}
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}
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}
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}
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static void
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g_mirror_ctl_rebuild(struct gctl_req *req, struct g_class *mp)
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{
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struct g_mirror_softc *sc;
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struct g_mirror_disk *disk;
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const char *name;
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char param[16];
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int *nargs;
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u_int i;
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g_topology_assert();
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nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs));
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if (nargs == NULL) {
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gctl_error(req, "No '%s' argument.", "nargs");
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return;
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}
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if (*nargs < 2) {
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gctl_error(req, "Too few arguments.");
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return;
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}
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name = gctl_get_asciiparam(req, "arg0");
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if (name == NULL) {
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gctl_error(req, "No 'arg%u' argument.", 0);
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return;
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}
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sc = g_mirror_find_device(mp, name);
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if (sc == NULL) {
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gctl_error(req, "No such device: %s.", name);
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return;
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}
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for (i = 1; i < (u_int)*nargs; i++) {
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snprintf(param, sizeof(param), "arg%u", i);
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name = gctl_get_asciiparam(req, param);
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if (name == NULL) {
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gctl_error(req, "No 'arg%u' argument.", i);
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return;
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}
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disk = g_mirror_find_disk(sc, name);
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if (disk == NULL) {
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gctl_error(req, "No such provider: %s.", name);
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return;
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}
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if (g_mirror_ndisks(sc, G_MIRROR_DISK_STATE_ACTIVE) == 1 &&
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disk->d_state == G_MIRROR_DISK_STATE_ACTIVE) {
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/*
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* This is the last active disk. There will be nothing
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* to rebuild it from, so deny this request.
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*/
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gctl_error(req,
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"Provider %s is the last active provider in %s.",
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name, sc->sc_geom->name);
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return;
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}
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/*
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* Do rebuild by resetting syncid and disconnecting disk.
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* It'll be retasted, connected to the mirror and
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* synchronized.
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*/
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disk->d_sync.ds_syncid = 0;
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if ((sc->sc_flags & G_MIRROR_DEVICE_FLAG_NOAUTOSYNC) != 0)
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disk->d_flags |= G_MIRROR_DISK_FLAG_FORCE_SYNC;
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g_mirror_update_metadata(disk);
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g_mirror_event_send(disk, G_MIRROR_DISK_STATE_DISCONNECTED,
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G_MIRROR_EVENT_WAIT);
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}
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}
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static void
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g_mirror_ctl_insert(struct gctl_req *req, struct g_class *mp)
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{
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struct g_mirror_softc *sc;
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struct g_mirror_disk *disk;
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struct g_mirror_metadata md;
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struct g_provider *pp;
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struct g_consumer *cp;
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const char *name;
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char param[16];
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u_char *sector;
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u_int i, n;
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int error, *nargs, *inactive;
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struct {
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struct g_provider *provider;
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struct g_consumer *consumer;
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} *disks;
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g_topology_assert();
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nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs));
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if (nargs == NULL) {
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gctl_error(req, "No '%s' argument.", "nargs");
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return;
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}
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if (*nargs < 2) {
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gctl_error(req, "Too few arguments.");
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return;
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}
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inactive = gctl_get_paraml(req, "inactive", sizeof(*inactive));
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if (inactive == NULL) {
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gctl_error(req, "No '%s' argument.", "inactive");
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return;
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}
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name = gctl_get_asciiparam(req, "arg0");
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if (name == NULL) {
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gctl_error(req, "No 'arg%u' argument.", 0);
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return;
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}
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sc = g_mirror_find_device(mp, name);
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if (sc == NULL) {
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gctl_error(req, "No such device: %s.", name);
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return;
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}
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if (g_mirror_ndisks(sc, -1) < sc->sc_ndisks) {
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gctl_error(req, "Not all disks connected.");
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return;
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}
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disks = g_malloc(sizeof(*disks) * (*nargs), M_WAITOK | M_ZERO);
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for (i = 1, n = 0; i < (u_int)*nargs; i++) {
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snprintf(param, sizeof(param), "arg%u", i);
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name = gctl_get_asciiparam(req, param);
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if (name == NULL) {
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gctl_error(req, "No 'arg%u' argument.", i);
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continue;
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}
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if (strncmp(name, "/dev/", strlen("/dev/")) == 0)
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name += strlen("/dev/");
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pp = g_provider_by_name(name);
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if (pp == NULL) {
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gctl_error(req, "Unknown provider %s.", name);
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continue;
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}
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if (sc->sc_provider->mediasize > pp->mediasize) {
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gctl_error(req, "Provider %s too small.", name);
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continue;
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}
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if ((sc->sc_provider->sectorsize % pp->sectorsize) != 0) {
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gctl_error(req, "Invalid sectorsize of provider %s.",
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name);
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continue;
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}
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cp = g_new_consumer(sc->sc_geom);
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if (g_attach(cp, pp) != 0) {
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g_destroy_consumer(cp);
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gctl_error(req, "Cannot attach to provider %s.", name);
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continue;
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}
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if (g_access(cp, 0, 1, 1) != 0) {
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g_detach(cp);
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g_destroy_consumer(cp);
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gctl_error(req, "Cannot access provider %s.", name);
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continue;
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}
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disks[n].provider = pp;
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disks[n].consumer = cp;
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n++;
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}
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if (n == 0) {
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g_free(disks);
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return;
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}
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sc->sc_ndisks += n;
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again:
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for (i = 0; i < n; i++) {
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if (disks[i].consumer == NULL)
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continue;
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g_mirror_fill_metadata(sc, NULL, &md);
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if (*inactive)
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md.md_dflags |= G_MIRROR_DISK_FLAG_INACTIVE;
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pp = disks[i].provider;
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sector = g_malloc(pp->sectorsize, M_WAITOK);
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mirror_metadata_encode(&md, sector);
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error = g_write_data(disks[i].consumer,
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pp->mediasize - pp->sectorsize, sector, pp->sectorsize);
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g_free(sector);
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if (error != 0) {
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gctl_error(req, "Cannot store metadata on %s.",
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pp->name);
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g_access(disks[i].consumer, 0, -1, -1);
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g_detach(disks[i].consumer);
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g_destroy_consumer(disks[i].consumer);
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disks[i].consumer = NULL;
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disks[i].provider = NULL;
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sc->sc_ndisks--;
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goto again;
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}
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}
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if (i == 0) {
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/* All writes failed. */
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g_free(disks);
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return;
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}
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LIST_FOREACH(disk, &sc->sc_disks, d_next) {
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g_mirror_update_metadata(disk);
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}
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/*
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* Release provider and wait for retaste.
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*/
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for (i = 0; i < n; i++) {
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if (disks[i].consumer == NULL)
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continue;
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g_access(disks[i].consumer, 0, -1, -1);
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g_detach(disks[i].consumer);
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g_destroy_consumer(disks[i].consumer);
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}
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g_free(disks);
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}
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static void
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g_mirror_ctl_remove(struct gctl_req *req, struct g_class *mp)
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{
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struct g_mirror_softc *sc;
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struct g_mirror_disk *disk;
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const char *name;
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char param[16];
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int *nargs;
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u_int i;
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g_topology_assert();
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nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs));
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if (nargs == NULL) {
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gctl_error(req, "No '%s' argument.", "nargs");
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return;
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}
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if (*nargs < 2) {
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gctl_error(req, "Too few arguments.");
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return;
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}
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name = gctl_get_asciiparam(req, "arg0");
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if (name == NULL) {
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gctl_error(req, "No 'arg%u' argument.", 0);
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return;
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}
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sc = g_mirror_find_device(mp, name);
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if (sc == NULL) {
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gctl_error(req, "No such device: %s.", name);
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return;
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}
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if (g_mirror_ndisks(sc, -1) < sc->sc_ndisks) {
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gctl_error(req, "Not all disks connected.");
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return;
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}
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for (i = 1; i < (u_int)*nargs; i++) {
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snprintf(param, sizeof(param), "arg%u", i);
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name = gctl_get_asciiparam(req, param);
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if (name == NULL) {
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gctl_error(req, "No 'arg%u' argument.", i);
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return;
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}
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disk = g_mirror_find_disk(sc, name);
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if (disk == NULL) {
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gctl_error(req, "No such provider: %s.", name);
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return;
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}
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g_mirror_event_send(disk, G_MIRROR_DISK_STATE_DESTROY,
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G_MIRROR_EVENT_WAIT);
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}
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}
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static void
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g_mirror_ctl_deactivate(struct gctl_req *req, struct g_class *mp)
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{
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struct g_mirror_softc *sc;
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struct g_mirror_disk *disk;
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const char *name;
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char param[16];
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int *nargs;
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u_int i;
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g_topology_assert();
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nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs));
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if (nargs == NULL) {
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gctl_error(req, "No '%s' argument.", "nargs");
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return;
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}
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if (*nargs < 2) {
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gctl_error(req, "Too few arguments.");
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return;
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}
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name = gctl_get_asciiparam(req, "arg0");
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if (name == NULL) {
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gctl_error(req, "No 'arg%u' argument.", 0);
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return;
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}
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sc = g_mirror_find_device(mp, name);
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if (sc == NULL) {
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gctl_error(req, "No such device: %s.", name);
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return;
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}
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for (i = 1; i < (u_int)*nargs; i++) {
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snprintf(param, sizeof(param), "arg%u", i);
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name = gctl_get_asciiparam(req, param);
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if (name == NULL) {
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gctl_error(req, "No 'arg%u' argument.", i);
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return;
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}
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disk = g_mirror_find_disk(sc, name);
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if (disk == NULL) {
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gctl_error(req, "No such provider: %s.", name);
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return;
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}
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/*
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* Do rebuild by resetting syncid and disconnecting disk.
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* It'll be retasted, connected to the mirror and
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* synchronized.
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*/
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disk->d_flags |= G_MIRROR_DISK_FLAG_INACTIVE;
|
|
disk->d_flags &= ~G_MIRROR_DISK_FLAG_FORCE_SYNC;
|
|
g_mirror_update_metadata(disk);
|
|
sc->sc_bump_syncid = G_MIRROR_BUMP_ON_FIRST_WRITE;
|
|
g_mirror_event_send(disk, G_MIRROR_DISK_STATE_DISCONNECTED,
|
|
G_MIRROR_EVENT_WAIT);
|
|
}
|
|
}
|
|
|
|
static void
|
|
g_mirror_ctl_forget(struct gctl_req *req, struct g_class *mp)
|
|
{
|
|
struct g_mirror_softc *sc;
|
|
struct g_mirror_disk *disk;
|
|
const char *name;
|
|
char param[16];
|
|
int *nargs;
|
|
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 < 1) {
|
|
gctl_error(req, "Missing device(s).");
|
|
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_mirror_find_device(mp, name);
|
|
if (sc == NULL) {
|
|
gctl_error(req, "No such device: %s.", name);
|
|
return;
|
|
}
|
|
if (g_mirror_ndisks(sc, -1) == sc->sc_ndisks) {
|
|
G_MIRROR_DEBUG(1,
|
|
"All disks connected in %s, skipping.",
|
|
sc->sc_name);
|
|
continue;
|
|
}
|
|
sc->sc_ndisks = g_mirror_ndisks(sc, -1);
|
|
LIST_FOREACH(disk, &sc->sc_disks, d_next) {
|
|
g_mirror_update_metadata(disk);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
g_mirror_ctl_stop(struct gctl_req *req, struct g_class *mp)
|
|
{
|
|
struct g_mirror_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 < 1) {
|
|
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_mirror_find_device(mp, name);
|
|
if (sc == NULL) {
|
|
gctl_error(req, "No such device: %s.", name);
|
|
return;
|
|
}
|
|
error = g_mirror_destroy(sc, *force);
|
|
if (error != 0) {
|
|
gctl_error(req, "Cannot destroy device %s (error=%d).",
|
|
sc->sc_geom->name, error);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
g_mirror_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_MIRROR_VERSION) {
|
|
gctl_error(req, "Userland and kernel parts are out of sync.");
|
|
return;
|
|
}
|
|
|
|
if (strcmp(verb, "configure") == 0)
|
|
g_mirror_ctl_configure(req, mp);
|
|
else if (strcmp(verb, "rebuild") == 0)
|
|
g_mirror_ctl_rebuild(req, mp);
|
|
else if (strcmp(verb, "insert") == 0)
|
|
g_mirror_ctl_insert(req, mp);
|
|
else if (strcmp(verb, "remove") == 0)
|
|
g_mirror_ctl_remove(req, mp);
|
|
else if (strcmp(verb, "deactivate") == 0)
|
|
g_mirror_ctl_deactivate(req, mp);
|
|
else if (strcmp(verb, "forget") == 0)
|
|
g_mirror_ctl_forget(req, mp);
|
|
else if (strcmp(verb, "stop") == 0)
|
|
g_mirror_ctl_stop(req, mp);
|
|
else
|
|
gctl_error(req, "Unknown verb.");
|
|
}
|