2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2007 Lukas Ertl
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
33 #include <sys/param.h>
34 #include <sys/kernel.h>
36 #include <sys/malloc.h>
37 #include <sys/mutex.h>
38 #include <sys/systm.h>
40 #include <geom/geom.h>
41 #include <geom/vinum/geom_vinum_var.h>
42 #include <geom/vinum/geom_vinum.h>
45 gv_post_event(struct gv_softc *sc, int event, void *arg1, void *arg2,
46 intmax_t arg3, intmax_t arg4)
50 ev = g_malloc(sizeof(*ev), M_WAITOK | M_ZERO);
57 mtx_lock(&sc->equeue_mtx);
58 TAILQ_INSERT_TAIL(&sc->equeue, ev, events);
60 mtx_unlock(&sc->equeue_mtx);
64 gv_worker_exit(struct gv_softc *sc)
68 ev = g_malloc(sizeof(*ev), M_WAITOK | M_ZERO);
69 ev->type = GV_EVENT_THREAD_EXIT;
71 mtx_lock(&sc->equeue_mtx);
72 TAILQ_INSERT_TAIL(&sc->equeue, ev, events);
74 msleep(sc->worker, &sc->equeue_mtx, PDROP, "gv_wor", 0);
78 gv_get_event(struct gv_softc *sc)
82 KASSERT(sc != NULL, ("NULL sc"));
83 mtx_lock(&sc->equeue_mtx);
84 ev = TAILQ_FIRST(&sc->equeue);
85 mtx_unlock(&sc->equeue_mtx);
90 gv_remove_event(struct gv_softc *sc, struct gv_event *ev)
93 KASSERT(sc != NULL, ("NULL sc"));
94 KASSERT(ev != NULL, ("NULL ev"));
95 mtx_lock(&sc->equeue_mtx);
96 TAILQ_REMOVE(&sc->equeue, ev, events);
97 mtx_unlock(&sc->equeue_mtx);
101 gv_drive_tasted(struct gv_softc *sc, struct g_provider *pp)
104 struct g_consumer *cp;
113 G_VINUM_DEBUG(2, "tasted drive on '%s'", pp->name);
114 if ((GV_CFG_OFFSET % pp->sectorsize) != 0 ||
115 (GV_CFG_LEN % pp->sectorsize) != 0) {
116 G_VINUM_DEBUG(0, "provider %s has unsupported sectorsize.",
123 cp = g_new_consumer(gp);
124 if (g_attach(cp, pp) != 0) {
125 g_destroy_consumer(cp);
127 G_VINUM_DEBUG(0, "failed to attach to provider on taste event");
130 if (g_access(cp, 1, 0, 0) != 0) {
132 g_destroy_consumer(cp);
134 G_VINUM_DEBUG(0, "failed to access consumer on taste event");
139 hdr = g_malloc(GV_HDR_LEN, M_WAITOK | M_ZERO);
140 /* Read header and on-disk configuration. */
141 error = gv_read_header(cp, hdr);
143 G_VINUM_DEBUG(0, "failed to read header during taste");
148 * Setup the drive before we parse the on-disk configuration, so that
149 * we already know about the drive then.
151 d = gv_find_drive(sc, hdr->label.name);
153 d = g_malloc(sizeof(*d), M_WAITOK | M_ZERO);
154 strlcpy(d->name, hdr->label.name, sizeof(d->name));
155 strlcpy(d->device, pp->name, sizeof(d->device));
156 } else if (d->flags & GV_DRIVE_REFERENCED) {
157 strlcpy(d->device, pp->name, sizeof(d->device));
158 d->flags &= ~GV_DRIVE_REFERENCED;
160 G_VINUM_DEBUG(2, "drive '%s' is already known", d->name);
164 /* Add the consumer and header to the new drive. */
167 gv_create_drive(sc, d);
169 buf = g_read_data(cp, GV_CFG_OFFSET, GV_CFG_LEN, NULL);
171 G_VINUM_DEBUG(0, "failed to read config during taste");
174 gv_parse_config(sc, buf, d);
178 g_access(cp, -1, 0, 0);
181 gv_setup_objects(sc);
182 gv_set_drive_state(d, GV_DRIVE_UP, 0);
190 g_access(cp, -1, 0, 0);
192 g_destroy_consumer(cp);
197 * When losing a drive (e.g. hardware failure), we cut down the consumer
198 * attached to the underlying device and bring the drive itself to a
199 * "referenced" state so that normal tasting could bring it up cleanly if it
200 * possibly arrives again.
203 gv_drive_lost(struct gv_softc *sc, struct gv_drive *d)
205 struct g_consumer *cp;
207 struct gv_sd *s, *s2;
208 struct gv_freelist *fl, *fl2;
210 gv_set_drive_state(d, GV_DRIVE_DOWN,
211 GV_SETSTATE_FORCE | GV_SETSTATE_CONFIG);
216 if (cp->nstart != cp->nend) {
217 G_VINUM_DEBUG(0, "dead drive '%s' has still active "
218 "requests, unable to detach consumer", d->name);
219 gv_post_event(sc, GV_EVENT_DRIVE_LOST, d, NULL, 0, 0);
223 if (cp->acr != 0 || cp->acw != 0 || cp->ace != 0)
224 g_access(cp, -cp->acr, -cp->acw, -cp->ace);
226 g_destroy_consumer(cp);
230 LIST_FOREACH_SAFE(fl, &d->freelist, freelist, fl2) {
231 LIST_REMOVE(fl, freelist);
238 d->flags |= GV_DRIVE_REFERENCED;
239 snprintf(d->device, sizeof(d->device), "???");
242 d->freelist_entries = 0;
245 /* Put the subdisk in tasted mode, and remove from drive list. */
246 LIST_FOREACH_SAFE(s, &d->subdisks, from_drive, s2) {
247 LIST_REMOVE(s, from_drive);
248 s->flags |= GV_SD_TASTED;
252 * Don't forget that gv_is_newer wants a "real" drive at the beginning
253 * of the list, so, just to be safe, we shuffle around.
255 LIST_REMOVE(d, drive);
256 d2 = LIST_FIRST(&sc->drives);
258 LIST_INSERT_HEAD(&sc->drives, d, drive);
260 LIST_INSERT_AFTER(d2, d, drive);