df5175af0f
This way, the VINUMDRIVE class is loaded before the VINUM class, but since geom does the tasting for newly arrived classes last-in-first-out, the VINUM class tastes first. This removes the need to call gv_parse_config() in the drive taste path.
668 lines
15 KiB
C
668 lines
15 KiB
C
/*-
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* Copyright (c) 2004, 2005 Lukas Ertl
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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 AUTHOR 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 AUTHOR 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/bio.h>
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#include <sys/errno.h>
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#include <sys/conf.h>
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#include <sys/kernel.h>
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#include <sys/kthread.h>
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#include <sys/libkern.h>
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#include <sys/lock.h>
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#include <sys/malloc.h>
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#include <sys/module.h>
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#include <sys/mutex.h>
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#include <sys/sbuf.h>
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#include <sys/systm.h>
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#include <sys/time.h>
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#include <geom/geom.h>
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#include <geom/vinum/geom_vinum_var.h>
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#include <geom/vinum/geom_vinum.h>
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#include <geom/vinum/geom_vinum_share.h>
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static void gv_drive_dead(void *, int);
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static void gv_drive_worker(void *);
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void gv_drive_modify(struct gv_drive *);
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void
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gv_config_new_drive(struct gv_drive *d)
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{
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struct gv_hdr *vhdr;
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struct gv_freelist *fl;
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KASSERT(d != NULL, ("config_new_drive: NULL d"));
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vhdr = g_malloc(sizeof(*vhdr), M_WAITOK | M_ZERO);
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vhdr->magic = GV_MAGIC;
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vhdr->config_length = GV_CFG_LEN;
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bcopy(hostname, vhdr->label.sysname, GV_HOSTNAME_LEN);
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strncpy(vhdr->label.name, d->name, GV_MAXDRIVENAME);
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microtime(&vhdr->label.date_of_birth);
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d->hdr = vhdr;
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LIST_INIT(&d->subdisks);
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LIST_INIT(&d->freelist);
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fl = g_malloc(sizeof(struct gv_freelist), M_WAITOK | M_ZERO);
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fl->offset = GV_DATA_START;
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fl->size = d->avail;
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LIST_INSERT_HEAD(&d->freelist, fl, freelist);
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d->freelist_entries = 1;
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TAILQ_INIT(&d->bqueue);
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mtx_init(&d->bqueue_mtx, "gv_drive", NULL, MTX_DEF);
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kthread_create(gv_drive_worker, d, NULL, 0, 0, "gv_d %s", d->name);
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d->flags |= GV_DRIVE_THREAD_ACTIVE;
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}
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void
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gv_save_config_all(struct gv_softc *sc)
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{
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struct gv_drive *d;
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g_topology_assert();
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LIST_FOREACH(d, &sc->drives, drive) {
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if (d->geom == NULL)
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continue;
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gv_save_config(NULL, d, sc);
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}
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}
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/* Save the vinum configuration back to disk. */
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void
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gv_save_config(struct g_consumer *cp, struct gv_drive *d, struct gv_softc *sc)
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{
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struct g_geom *gp;
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struct g_consumer *cp2;
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struct gv_hdr *vhdr, *hdr;
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struct sbuf *sb;
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int error;
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g_topology_assert();
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KASSERT(d != NULL, ("gv_save_config: null d"));
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KASSERT(sc != NULL, ("gv_save_config: null sc"));
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/*
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* We can't save the config on a drive that isn't up, but drives that
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* were just created aren't officially up yet, so we check a special
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* flag.
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*/
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if ((d->state != GV_DRIVE_UP) && !(d->flags && GV_DRIVE_NEWBORN))
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return;
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if (cp == NULL) {
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gp = d->geom;
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KASSERT(gp != NULL, ("gv_save_config: null gp"));
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cp2 = LIST_FIRST(&gp->consumer);
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KASSERT(cp2 != NULL, ("gv_save_config: null cp2"));
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} else
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cp2 = cp;
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vhdr = g_malloc(GV_HDR_LEN, M_WAITOK | M_ZERO);
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vhdr->magic = GV_MAGIC;
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vhdr->config_length = GV_CFG_LEN;
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hdr = d->hdr;
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if (hdr == NULL) {
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printf("GEOM_VINUM: drive %s has NULL hdr\n", d->name);
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g_free(vhdr);
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return;
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}
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microtime(&hdr->label.last_update);
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bcopy(&hdr->label, &vhdr->label, sizeof(struct gv_label));
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sb = sbuf_new(NULL, NULL, GV_CFG_LEN, SBUF_FIXEDLEN);
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gv_format_config(sc, sb, 1, NULL);
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sbuf_finish(sb);
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error = g_access(cp2, 0, 1, 0);
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if (error) {
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printf("GEOM_VINUM: g_access failed on drive %s, errno %d\n",
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d->name, error);
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sbuf_delete(sb);
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g_free(vhdr);
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return;
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}
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g_topology_unlock();
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do {
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error = g_write_data(cp2, GV_HDR_OFFSET, vhdr, GV_HDR_LEN);
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if (error) {
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printf("GEOM_VINUM: writing vhdr failed on drive %s, "
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"errno %d", d->name, error);
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break;
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}
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error = g_write_data(cp2, GV_CFG_OFFSET, sbuf_data(sb),
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GV_CFG_LEN);
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if (error) {
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printf("GEOM_VINUM: writing first config copy failed "
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"on drive %s, errno %d", d->name, error);
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break;
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}
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error = g_write_data(cp2, GV_CFG_OFFSET + GV_CFG_LEN,
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sbuf_data(sb), GV_CFG_LEN);
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if (error)
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printf("GEOM_VINUM: writing second config copy failed "
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"on drive %s, errno %d", d->name, error);
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} while (0);
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g_topology_lock();
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g_access(cp2, 0, -1, 0);
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sbuf_delete(sb);
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g_free(vhdr);
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if (d->geom != NULL)
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gv_drive_modify(d);
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}
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/* This resembles g_slice_access(). */
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static int
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gv_drive_access(struct g_provider *pp, int dr, int dw, int de)
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{
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struct g_geom *gp;
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struct g_consumer *cp;
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struct g_provider *pp2;
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struct gv_drive *d;
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struct gv_sd *s, *s2;
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int error;
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gp = pp->geom;
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cp = LIST_FIRST(&gp->consumer);
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if (cp == NULL)
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return (0);
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d = gp->softc;
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if (d == NULL)
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return (0);
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s = pp->private;
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KASSERT(s != NULL, ("gv_drive_access: NULL s"));
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LIST_FOREACH(s2, &d->subdisks, from_drive) {
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if (s == s2)
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continue;
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if (s->drive_offset + s->size <= s2->drive_offset)
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continue;
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if (s2->drive_offset + s2->size <= s->drive_offset)
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continue;
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/* Overlap. */
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pp2 = s2->provider;
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KASSERT(s2 != NULL, ("gv_drive_access: NULL s2"));
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if ((pp->acw + dw) > 0 && pp2->ace > 0)
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return (EPERM);
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if ((pp->ace + de) > 0 && pp2->acw > 0)
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return (EPERM);
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}
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error = g_access(cp, dr, dw, de);
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return (error);
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}
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static void
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gv_drive_done(struct bio *bp)
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{
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struct gv_drive *d;
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struct gv_bioq *bq;
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/* Put the BIO on the worker queue again. */
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d = bp->bio_from->geom->softc;
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bp->bio_cflags |= GV_BIO_DONE;
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bq = g_malloc(sizeof(*bq), M_NOWAIT | M_ZERO);
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bq->bp = bp;
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mtx_lock(&d->bqueue_mtx);
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TAILQ_INSERT_TAIL(&d->bqueue, bq, queue);
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wakeup(d);
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mtx_unlock(&d->bqueue_mtx);
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}
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static void
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gv_drive_start(struct bio *bp)
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{
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struct gv_drive *d;
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struct gv_sd *s;
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struct gv_bioq *bq;
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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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break;
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case BIO_GETATTR:
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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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s = bp->bio_to->private;
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if ((s->state == GV_SD_DOWN) || (s->state == GV_SD_STALE)) {
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g_io_deliver(bp, ENXIO);
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return;
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}
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d = bp->bio_to->geom->softc;
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/*
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* Put the BIO on the worker queue, where the worker thread will pick
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* it up.
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*/
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bq = g_malloc(sizeof(*bq), M_NOWAIT | M_ZERO);
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bq->bp = bp;
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mtx_lock(&d->bqueue_mtx);
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TAILQ_INSERT_TAIL(&d->bqueue, bq, queue);
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wakeup(d);
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mtx_unlock(&d->bqueue_mtx);
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}
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static void
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gv_drive_worker(void *arg)
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{
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struct bio *bp, *cbp;
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struct g_geom *gp;
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struct g_provider *pp;
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struct gv_drive *d;
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struct gv_sd *s;
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struct gv_bioq *bq, *bq2;
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int error;
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d = arg;
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mtx_lock(&d->bqueue_mtx);
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for (;;) {
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/* We were signaled to exit. */
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if (d->flags & GV_DRIVE_THREAD_DIE)
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break;
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/* Take the first BIO from out queue. */
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bq = TAILQ_FIRST(&d->bqueue);
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if (bq == NULL) {
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msleep(d, &d->bqueue_mtx, PRIBIO, "-", hz/10);
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continue;
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}
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TAILQ_REMOVE(&d->bqueue, bq, queue);
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mtx_unlock(&d->bqueue_mtx);
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bp = bq->bp;
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g_free(bq);
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pp = bp->bio_to;
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gp = pp->geom;
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/* Completed request. */
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if (bp->bio_cflags & GV_BIO_DONE) {
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error = bp->bio_error;
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/* Deliver the original request. */
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g_std_done(bp);
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/* The request had an error, we need to clean up. */
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if (error != 0) {
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g_topology_lock();
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gv_set_drive_state(d, GV_DRIVE_DOWN,
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GV_SETSTATE_FORCE | GV_SETSTATE_CONFIG);
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g_topology_unlock();
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g_post_event(gv_drive_dead, d, M_WAITOK, d,
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NULL);
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}
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/* New request, needs to be sent downwards. */
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} else {
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s = pp->private;
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if ((s->state == GV_SD_DOWN) ||
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(s->state == GV_SD_STALE)) {
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g_io_deliver(bp, ENXIO);
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mtx_lock(&d->bqueue_mtx);
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continue;
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}
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if (bp->bio_offset > s->size) {
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g_io_deliver(bp, EINVAL);
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mtx_lock(&d->bqueue_mtx);
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continue;
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}
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cbp = g_clone_bio(bp);
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if (cbp == NULL) {
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g_io_deliver(bp, ENOMEM);
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mtx_lock(&d->bqueue_mtx);
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continue;
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}
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if (cbp->bio_offset + cbp->bio_length > s->size)
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cbp->bio_length = s->size -
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cbp->bio_offset;
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cbp->bio_done = gv_drive_done;
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cbp->bio_offset += s->drive_offset;
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g_io_request(cbp, LIST_FIRST(&gp->consumer));
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}
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mtx_lock(&d->bqueue_mtx);
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}
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TAILQ_FOREACH_SAFE(bq, &d->bqueue, queue, bq2) {
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TAILQ_REMOVE(&d->bqueue, bq, queue);
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mtx_unlock(&d->bqueue_mtx);
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bp = bq->bp;
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g_free(bq);
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if (bp->bio_cflags & GV_BIO_DONE)
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g_std_done(bp);
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else
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g_io_deliver(bp, ENXIO);
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mtx_lock(&d->bqueue_mtx);
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}
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mtx_unlock(&d->bqueue_mtx);
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d->flags |= GV_DRIVE_THREAD_DEAD;
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kthread_exit(ENXIO);
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}
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static void
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gv_drive_orphan(struct g_consumer *cp)
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{
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struct g_geom *gp;
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struct gv_drive *d;
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g_topology_assert();
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gp = cp->geom;
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g_trace(G_T_TOPOLOGY, "gv_drive_orphan(%s)", gp->name);
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d = gp->softc;
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if (d != NULL) {
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gv_set_drive_state(d, GV_DRIVE_DOWN,
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GV_SETSTATE_FORCE | GV_SETSTATE_CONFIG);
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g_post_event(gv_drive_dead, d, M_WAITOK, d, NULL);
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} else
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g_wither_geom(gp, ENXIO);
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}
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static struct g_geom *
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gv_drive_taste(struct g_class *mp, struct g_provider *pp, int flags __unused)
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{
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struct g_geom *gp, *gp2;
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struct g_consumer *cp;
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struct gv_drive *d;
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struct gv_sd *s;
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struct gv_softc *sc;
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struct gv_freelist *fl;
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struct gv_hdr *vhdr;
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int error;
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char errstr[ERRBUFSIZ];
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vhdr = NULL;
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d = NULL;
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g_trace(G_T_TOPOLOGY, "gv_drive_taste(%s, %s)", mp->name, pp->name);
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g_topology_assert();
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/* Find the VINUM class and its associated geom. */
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gp2 = find_vinum_geom();
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if (gp2 == NULL)
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return (NULL);
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sc = gp2->softc;
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gp = g_new_geomf(mp, "%s.vinumdrive", pp->name);
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gp->start = gv_drive_start;
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gp->orphan = gv_drive_orphan;
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gp->access = gv_drive_access;
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gp->start = gv_drive_start;
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cp = g_new_consumer(gp);
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g_attach(cp, pp);
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error = g_access(cp, 1, 0, 0);
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if (error) {
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g_detach(cp);
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g_destroy_consumer(cp);
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g_destroy_geom(gp);
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return (NULL);
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}
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g_topology_unlock();
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/* Now check if the provided slice is a valid vinum drive. */
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do {
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vhdr = g_read_data(cp, GV_HDR_OFFSET, pp->sectorsize, &error);
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if (vhdr == NULL || error != 0)
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break;
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if (vhdr->magic != GV_MAGIC) {
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g_free(vhdr);
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break;
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}
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g_topology_lock();
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/*
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* We have found a valid vinum drive. Let's see if it is
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* already known in the configuration.
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*/
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d = gv_find_drive(sc, vhdr->label.name);
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/* We already know about this drive. */
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if (d != NULL) {
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/* Check if this drive already has a geom. */
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if (d->geom != NULL) {
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g_topology_unlock();
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break;
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}
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bcopy(vhdr, d->hdr, sizeof(*vhdr));
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/* This is a new drive. */
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} else {
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d = g_malloc(sizeof(*d), M_WAITOK | M_ZERO);
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/* Initialize all needed variables. */
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d->size = pp->mediasize - GV_DATA_START;
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d->avail = d->size;
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d->hdr = vhdr;
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strncpy(d->name, vhdr->label.name, GV_MAXDRIVENAME);
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LIST_INIT(&d->subdisks);
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LIST_INIT(&d->freelist);
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/* We also need a freelist entry. */
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fl = g_malloc(sizeof(*fl), M_WAITOK | M_ZERO);
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fl->offset = GV_DATA_START;
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fl->size = d->avail;
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LIST_INSERT_HEAD(&d->freelist, fl, freelist);
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d->freelist_entries = 1;
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TAILQ_INIT(&d->bqueue);
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/* Save it into the main configuration. */
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LIST_INSERT_HEAD(&sc->drives, d, drive);
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}
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/*
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* Create a bio queue mutex and a worker thread, if necessary.
|
|
*/
|
|
if (mtx_initialized(&d->bqueue_mtx) == 0)
|
|
mtx_init(&d->bqueue_mtx, "gv_drive", NULL, MTX_DEF);
|
|
|
|
if (!(d->flags & GV_DRIVE_THREAD_ACTIVE)) {
|
|
kthread_create(gv_drive_worker, d, NULL, 0, 0,
|
|
"gv_d %s", d->name);
|
|
d->flags |= GV_DRIVE_THREAD_ACTIVE;
|
|
}
|
|
|
|
g_access(cp, -1, 0, 0);
|
|
|
|
gp->softc = d;
|
|
d->geom = gp;
|
|
d->vinumconf = sc;
|
|
strncpy(d->device, pp->name, GV_MAXDRIVENAME);
|
|
|
|
/*
|
|
* Find out which subdisks belong to this drive and crosslink
|
|
* them.
|
|
*/
|
|
LIST_FOREACH(s, &sc->subdisks, sd) {
|
|
if (!strncmp(s->drive, d->name, GV_MAXDRIVENAME))
|
|
/* XXX: errors ignored */
|
|
gv_sd_to_drive(sc, d, s, errstr,
|
|
sizeof(errstr));
|
|
}
|
|
|
|
/* This drive is now up for sure. */
|
|
gv_set_drive_state(d, GV_DRIVE_UP, 0);
|
|
|
|
/*
|
|
* If there are subdisks on this drive, we need to create
|
|
* providers for them.
|
|
*/
|
|
if (d->sdcount)
|
|
gv_drive_modify(d);
|
|
|
|
return (gp);
|
|
|
|
} while (0);
|
|
|
|
g_topology_lock();
|
|
g_access(cp, -1, 0, 0);
|
|
|
|
g_detach(cp);
|
|
g_destroy_consumer(cp);
|
|
g_destroy_geom(gp);
|
|
return (NULL);
|
|
}
|
|
|
|
/*
|
|
* Modify the providers for the given drive 'd'. It is assumed that the
|
|
* subdisk list of 'd' is already correctly set up.
|
|
*/
|
|
void
|
|
gv_drive_modify(struct gv_drive *d)
|
|
{
|
|
struct g_geom *gp;
|
|
struct g_consumer *cp;
|
|
struct g_provider *pp, *pp2;
|
|
struct gv_sd *s;
|
|
|
|
KASSERT(d != NULL, ("gv_drive_modify: null d"));
|
|
gp = d->geom;
|
|
KASSERT(gp != NULL, ("gv_drive_modify: null gp"));
|
|
cp = LIST_FIRST(&gp->consumer);
|
|
KASSERT(cp != NULL, ("gv_drive_modify: null cp"));
|
|
pp = cp->provider;
|
|
KASSERT(pp != NULL, ("gv_drive_modify: null pp"));
|
|
|
|
g_topology_assert();
|
|
|
|
LIST_FOREACH(s, &d->subdisks, from_drive) {
|
|
/* This subdisk already has a provider. */
|
|
if (s->provider != NULL)
|
|
continue;
|
|
pp2 = g_new_providerf(gp, "gvinum/sd/%s", s->name);
|
|
pp2->mediasize = s->size;
|
|
pp2->sectorsize = pp->sectorsize;
|
|
g_error_provider(pp2, 0);
|
|
s->provider = pp2;
|
|
pp2->private = s;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gv_drive_dead(void *arg, int flag)
|
|
{
|
|
struct g_geom *gp;
|
|
struct g_consumer *cp;
|
|
struct gv_drive *d;
|
|
struct gv_sd *s;
|
|
|
|
g_topology_assert();
|
|
KASSERT(arg != NULL, ("gv_drive_dead: NULL arg"));
|
|
|
|
if (flag == EV_CANCEL)
|
|
return;
|
|
|
|
d = arg;
|
|
if (d->state != GV_DRIVE_DOWN)
|
|
return;
|
|
|
|
g_trace(G_T_TOPOLOGY, "gv_drive_dead(%s)", d->name);
|
|
|
|
gp = d->geom;
|
|
if (gp == NULL)
|
|
return;
|
|
|
|
LIST_FOREACH(cp, &gp->consumer, consumer) {
|
|
if (cp->nstart != cp->nend) {
|
|
printf("GEOM_VINUM: dead drive '%s' has still "
|
|
"active requests, can't detach consumer\n",
|
|
d->name);
|
|
g_post_event(gv_drive_dead, d, M_WAITOK, d,
|
|
NULL);
|
|
return;
|
|
}
|
|
if (cp->acr != 0 || cp->acw != 0 || cp->ace != 0)
|
|
g_access(cp, -cp->acr, -cp->acw, -cp->ace);
|
|
}
|
|
|
|
printf("GEOM_VINUM: lost drive '%s'\n", d->name);
|
|
d->geom = NULL;
|
|
LIST_FOREACH(s, &d->subdisks, from_drive) {
|
|
s->provider = NULL;
|
|
s->consumer = NULL;
|
|
}
|
|
gv_kill_drive_thread(d);
|
|
gp->softc = NULL;
|
|
g_wither_geom(gp, ENXIO);
|
|
}
|
|
|
|
static int
|
|
gv_drive_destroy_geom(struct gctl_req *req, struct g_class *mp,
|
|
struct g_geom *gp)
|
|
{
|
|
struct gv_drive *d;
|
|
|
|
g_trace(G_T_TOPOLOGY, "gv_drive_destroy_geom: %s", gp->name);
|
|
g_topology_assert();
|
|
|
|
d = gp->softc;
|
|
gv_kill_drive_thread(d);
|
|
|
|
g_wither_geom(gp, ENXIO);
|
|
return (0);
|
|
}
|
|
|
|
#define VINUMDRIVE_CLASS_NAME "VINUMDRIVE"
|
|
|
|
static struct g_class g_vinum_drive_class = {
|
|
.name = VINUMDRIVE_CLASS_NAME,
|
|
.version = G_VERSION,
|
|
.taste = gv_drive_taste,
|
|
.destroy_geom = gv_drive_destroy_geom
|
|
};
|
|
|
|
DECLARE_GEOM_CLASS(g_vinum_drive_class, g_vinum_drive);
|