geom_vinum_drive.c revision 146325
1130389Sle/*- 2142020Sle * Copyright (c) 2004, 2005 Lukas Ertl 3130389Sle * All rights reserved. 4130389Sle * 5130389Sle * Redistribution and use in source and binary forms, with or without 6130389Sle * modification, are permitted provided that the following conditions 7130389Sle * are met: 8130389Sle * 1. Redistributions of source code must retain the above copyright 9130389Sle * notice, this list of conditions and the following disclaimer. 10130389Sle * 2. Redistributions in binary form must reproduce the above copyright 11130389Sle * notice, this list of conditions and the following disclaimer in the 12130389Sle * documentation and/or other materials provided with the distribution. 13130389Sle * 14130389Sle * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15130389Sle * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16130389Sle * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17130389Sle * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18130389Sle * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19130389Sle * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20130389Sle * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21130389Sle * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22130389Sle * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23130389Sle * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24130389Sle * SUCH DAMAGE. 25130389Sle */ 26130389Sle 27130389Sle#include <sys/cdefs.h> 28130389Sle__FBSDID("$FreeBSD: head/sys/geom/vinum/geom_vinum_drive.c 146325 2005-05-17 16:38:30Z le $"); 29130389Sle 30130389Sle#include <sys/param.h> 31130389Sle#include <sys/bio.h> 32130389Sle#include <sys/errno.h> 33130389Sle#include <sys/conf.h> 34130389Sle#include <sys/kernel.h> 35130389Sle#include <sys/kthread.h> 36130389Sle#include <sys/libkern.h> 37130389Sle#include <sys/lock.h> 38130389Sle#include <sys/malloc.h> 39130389Sle#include <sys/module.h> 40130389Sle#include <sys/mutex.h> 41130389Sle#include <sys/sbuf.h> 42130389Sle#include <sys/systm.h> 43130389Sle#include <sys/time.h> 44130389Sle 45130389Sle#include <geom/geom.h> 46130389Sle#include <geom/vinum/geom_vinum_var.h> 47130389Sle#include <geom/vinum/geom_vinum.h> 48130389Sle#include <geom/vinum/geom_vinum_share.h> 49130389Sle 50146325Slestatic void gv_drive_dead(void *, int); 51135173Slestatic void gv_drive_worker(void *); 52130389Slevoid gv_drive_modify(struct gv_drive *); 53130389Sle 54130389Slevoid 55134407Slegv_config_new_drive(struct gv_drive *d) 56134407Sle{ 57134407Sle struct gv_hdr *vhdr; 58134407Sle struct gv_freelist *fl; 59134407Sle 60134407Sle KASSERT(d != NULL, ("config_new_drive: NULL d")); 61134407Sle 62134407Sle vhdr = g_malloc(sizeof(*vhdr), M_WAITOK | M_ZERO); 63134407Sle vhdr->magic = GV_MAGIC; 64134407Sle vhdr->config_length = GV_CFG_LEN; 65134407Sle 66134407Sle bcopy(hostname, vhdr->label.sysname, GV_HOSTNAME_LEN); 67134407Sle strncpy(vhdr->label.name, d->name, GV_MAXDRIVENAME); 68134407Sle microtime(&vhdr->label.date_of_birth); 69134407Sle 70134407Sle d->hdr = vhdr; 71134407Sle 72134407Sle LIST_INIT(&d->subdisks); 73134407Sle LIST_INIT(&d->freelist); 74134407Sle 75134407Sle fl = g_malloc(sizeof(struct gv_freelist), M_WAITOK | M_ZERO); 76134407Sle fl->offset = GV_DATA_START; 77134407Sle fl->size = d->avail; 78134407Sle LIST_INSERT_HEAD(&d->freelist, fl, freelist); 79134407Sle d->freelist_entries = 1; 80135173Sle 81135173Sle TAILQ_INIT(&d->bqueue); 82135173Sle mtx_init(&d->bqueue_mtx, "gv_drive", NULL, MTX_DEF); 83135173Sle kthread_create(gv_drive_worker, d, NULL, 0, 0, "gv_d %s", d->name); 84135173Sle d->flags |= GV_DRIVE_THREAD_ACTIVE; 85134407Sle} 86134407Sle 87134407Slevoid 88130389Slegv_save_config_all(struct gv_softc *sc) 89130389Sle{ 90130389Sle struct gv_drive *d; 91130389Sle 92130389Sle g_topology_assert(); 93130389Sle 94130389Sle LIST_FOREACH(d, &sc->drives, drive) { 95130389Sle if (d->geom == NULL) 96130389Sle continue; 97130389Sle gv_save_config(NULL, d, sc); 98130389Sle } 99130389Sle} 100130389Sle 101130389Sle/* Save the vinum configuration back to disk. */ 102130389Slevoid 103130389Slegv_save_config(struct g_consumer *cp, struct gv_drive *d, struct gv_softc *sc) 104130389Sle{ 105130389Sle struct g_geom *gp; 106130389Sle struct g_consumer *cp2; 107130389Sle struct gv_hdr *vhdr, *hdr; 108130389Sle struct sbuf *sb; 109130389Sle int error; 110130389Sle 111130389Sle g_topology_assert(); 112130389Sle 113130389Sle KASSERT(d != NULL, ("gv_save_config: null d")); 114130389Sle KASSERT(sc != NULL, ("gv_save_config: null sc")); 115130389Sle 116146325Sle if (d->state != GV_DRIVE_UP) 117146325Sle return; 118146325Sle 119130389Sle if (cp == NULL) { 120130389Sle gp = d->geom; 121130389Sle KASSERT(gp != NULL, ("gv_save_config: null gp")); 122130389Sle cp2 = LIST_FIRST(&gp->consumer); 123130389Sle KASSERT(cp2 != NULL, ("gv_save_config: null cp2")); 124130389Sle } else 125130389Sle cp2 = cp; 126130389Sle 127130389Sle vhdr = g_malloc(GV_HDR_LEN, M_WAITOK | M_ZERO); 128130389Sle vhdr->magic = GV_MAGIC; 129130389Sle vhdr->config_length = GV_CFG_LEN; 130130389Sle 131130389Sle hdr = d->hdr; 132130389Sle if (hdr == NULL) { 133146325Sle printf("GEOM_VINUM: drive %s has NULL hdr\n", d->name); 134130389Sle g_free(vhdr); 135130389Sle return; 136130389Sle } 137130389Sle microtime(&hdr->label.last_update); 138130389Sle bcopy(&hdr->label, &vhdr->label, sizeof(struct gv_label)); 139130389Sle 140130389Sle sb = sbuf_new(NULL, NULL, GV_CFG_LEN, SBUF_FIXEDLEN); 141130389Sle gv_format_config(sc, sb, 1, NULL); 142130389Sle sbuf_finish(sb); 143130389Sle 144130389Sle error = g_access(cp2, 0, 1, 0); 145130389Sle if (error) { 146146325Sle printf("GEOM_VINUM: g_access failed on drive %s, errno %d\n", 147146325Sle d->name, error); 148130389Sle sbuf_delete(sb); 149146325Sle g_free(vhdr); 150130389Sle return; 151130389Sle } 152130389Sle g_topology_unlock(); 153130389Sle 154130389Sle do { 155130389Sle error = g_write_data(cp2, GV_HDR_OFFSET, vhdr, GV_HDR_LEN); 156130389Sle if (error) { 157146325Sle printf("GEOM_VINUM: writing vhdr failed on drive %s, " 158146325Sle "errno %d", d->name, error); 159130389Sle break; 160130389Sle } 161130389Sle 162130389Sle error = g_write_data(cp2, GV_CFG_OFFSET, sbuf_data(sb), 163130389Sle GV_CFG_LEN); 164130389Sle if (error) { 165146325Sle printf("GEOM_VINUM: writing first config copy failed " 166146325Sle "on drive %s, errno %d", d->name, error); 167130389Sle break; 168130389Sle } 169130389Sle 170130389Sle error = g_write_data(cp2, GV_CFG_OFFSET + GV_CFG_LEN, 171130389Sle sbuf_data(sb), GV_CFG_LEN); 172130389Sle if (error) 173146325Sle printf("GEOM_VINUM: writing second config copy failed " 174146325Sle "on drive %s, errno %d", d->name, error); 175130389Sle } while (0); 176130389Sle 177130389Sle g_topology_lock(); 178130389Sle g_access(cp2, 0, -1, 0); 179130389Sle sbuf_delete(sb); 180130389Sle g_free(vhdr); 181130389Sle 182130389Sle if (d->geom != NULL) 183130389Sle gv_drive_modify(d); 184130389Sle} 185130389Sle 186130389Sle/* This resembles g_slice_access(). */ 187130389Slestatic int 188130389Slegv_drive_access(struct g_provider *pp, int dr, int dw, int de) 189130389Sle{ 190130389Sle struct g_geom *gp; 191130389Sle struct g_consumer *cp; 192130389Sle struct g_provider *pp2; 193130389Sle struct gv_drive *d; 194130389Sle struct gv_sd *s, *s2; 195130389Sle int error; 196130389Sle 197130389Sle gp = pp->geom; 198130389Sle cp = LIST_FIRST(&gp->consumer); 199135173Sle if (cp == NULL) 200135173Sle return (0); 201130389Sle 202130389Sle d = gp->softc; 203146325Sle if (d == NULL) 204146325Sle return (0); 205130389Sle 206130389Sle s = pp->private; 207130389Sle KASSERT(s != NULL, ("gv_drive_access: NULL s")); 208130389Sle 209130389Sle LIST_FOREACH(s2, &d->subdisks, from_drive) { 210130389Sle if (s == s2) 211130389Sle continue; 212130389Sle if (s->drive_offset + s->size <= s2->drive_offset) 213130389Sle continue; 214130389Sle if (s2->drive_offset + s2->size <= s->drive_offset) 215130389Sle continue; 216130389Sle 217130389Sle /* Overlap. */ 218130389Sle pp2 = s2->provider; 219130389Sle KASSERT(s2 != NULL, ("gv_drive_access: NULL s2")); 220146325Sle if ((pp->acw + dw) > 0 && pp2->ace > 0) 221130389Sle return (EPERM); 222146325Sle if ((pp->ace + de) > 0 && pp2->acw > 0) 223130389Sle return (EPERM); 224130389Sle } 225130389Sle 226130389Sle error = g_access(cp, dr, dw, de); 227130389Sle return (error); 228130389Sle} 229130389Sle 230130389Slestatic void 231135173Slegv_drive_done(struct bio *bp) 232135173Sle{ 233135173Sle struct gv_drive *d; 234135173Sle struct gv_bioq *bq; 235135173Sle 236135173Sle /* Put the BIO on the worker queue again. */ 237135173Sle d = bp->bio_from->geom->softc; 238135173Sle bp->bio_cflags |= GV_BIO_DONE; 239135173Sle bq = g_malloc(sizeof(*bq), M_NOWAIT | M_ZERO); 240135173Sle bq->bp = bp; 241135173Sle mtx_lock(&d->bqueue_mtx); 242135173Sle TAILQ_INSERT_TAIL(&d->bqueue, bq, queue); 243135173Sle wakeup(d); 244135173Sle mtx_unlock(&d->bqueue_mtx); 245135173Sle} 246135173Sle 247135173Sle 248135173Slestatic void 249130389Slegv_drive_start(struct bio *bp) 250130389Sle{ 251130389Sle struct gv_drive *d; 252130389Sle struct gv_sd *s; 253135173Sle struct gv_bioq *bq; 254130389Sle 255135173Sle switch (bp->bio_cmd) { 256135173Sle case BIO_READ: 257135173Sle case BIO_WRITE: 258135173Sle case BIO_DELETE: 259135173Sle break; 260135173Sle case BIO_GETATTR: 261135173Sle default: 262135173Sle g_io_deliver(bp, EOPNOTSUPP); 263135173Sle return; 264135173Sle } 265130389Sle 266135173Sle s = bp->bio_to->private; 267130389Sle if ((s->state == GV_SD_DOWN) || (s->state == GV_SD_STALE)) { 268130389Sle g_io_deliver(bp, ENXIO); 269130389Sle return; 270130389Sle } 271130389Sle 272135173Sle d = bp->bio_to->geom->softc; 273130389Sle 274135173Sle /* 275135173Sle * Put the BIO on the worker queue, where the worker thread will pick 276135173Sle * it up. 277135173Sle */ 278135173Sle bq = g_malloc(sizeof(*bq), M_NOWAIT | M_ZERO); 279135173Sle bq->bp = bp; 280135173Sle mtx_lock(&d->bqueue_mtx); 281135173Sle TAILQ_INSERT_TAIL(&d->bqueue, bq, queue); 282135173Sle wakeup(d); 283135173Sle mtx_unlock(&d->bqueue_mtx); 284130389Sle 285135173Sle} 286135173Sle 287135173Slestatic void 288135173Slegv_drive_worker(void *arg) 289135173Sle{ 290135173Sle struct bio *bp, *cbp; 291135173Sle struct g_geom *gp; 292135173Sle struct g_provider *pp; 293135173Sle struct gv_drive *d; 294135173Sle struct gv_sd *s; 295135173Sle struct gv_bioq *bq, *bq2; 296135173Sle int error; 297135173Sle 298135173Sle d = arg; 299135173Sle 300135173Sle mtx_lock(&d->bqueue_mtx); 301135173Sle for (;;) { 302135173Sle /* We were signaled to exit. */ 303135173Sle if (d->flags & GV_DRIVE_THREAD_DIE) 304135173Sle break; 305135173Sle 306135173Sle /* Take the first BIO from out queue. */ 307135173Sle bq = TAILQ_FIRST(&d->bqueue); 308135173Sle if (bq == NULL) { 309135173Sle msleep(d, &d->bqueue_mtx, PRIBIO, "-", hz/10); 310135173Sle continue; 311135173Sle } 312135173Sle TAILQ_REMOVE(&d->bqueue, bq, queue); 313135173Sle mtx_unlock(&d->bqueue_mtx); 314135173Sle 315135173Sle bp = bq->bp; 316135173Sle g_free(bq); 317135173Sle pp = bp->bio_to; 318135173Sle gp = pp->geom; 319135173Sle 320135173Sle /* Completed request. */ 321135173Sle if (bp->bio_cflags & GV_BIO_DONE) { 322135173Sle error = bp->bio_error; 323135173Sle 324135173Sle /* Deliver the original request. */ 325135173Sle g_std_done(bp); 326135173Sle 327135173Sle /* The request had an error, we need to clean up. */ 328135173Sle if (error != 0) { 329135173Sle g_topology_lock(); 330135173Sle gv_set_drive_state(d, GV_DRIVE_DOWN, 331135173Sle GV_SETSTATE_FORCE | GV_SETSTATE_CONFIG); 332135173Sle g_topology_unlock(); 333146325Sle g_post_event(gv_drive_dead, d, M_WAITOK, d, 334146325Sle NULL); 335135173Sle } 336135173Sle 337135173Sle /* New request, needs to be sent downwards. */ 338135173Sle } else { 339135173Sle s = pp->private; 340135173Sle 341135173Sle if ((s->state == GV_SD_DOWN) || 342135173Sle (s->state == GV_SD_STALE)) { 343135173Sle g_io_deliver(bp, ENXIO); 344135173Sle mtx_lock(&d->bqueue_mtx); 345135173Sle continue; 346135173Sle } 347135173Sle if (bp->bio_offset > s->size) { 348135173Sle g_io_deliver(bp, EINVAL); 349135173Sle mtx_lock(&d->bqueue_mtx); 350135173Sle continue; 351135173Sle } 352135173Sle 353135173Sle cbp = g_clone_bio(bp); 354135173Sle if (cbp == NULL) { 355135173Sle g_io_deliver(bp, ENOMEM); 356135173Sle mtx_lock(&d->bqueue_mtx); 357135173Sle continue; 358135173Sle } 359135173Sle if (cbp->bio_offset + cbp->bio_length > s->size) 360135173Sle cbp->bio_length = s->size - 361135173Sle cbp->bio_offset; 362135173Sle cbp->bio_done = gv_drive_done; 363135173Sle cbp->bio_offset += s->drive_offset; 364135173Sle g_io_request(cbp, LIST_FIRST(&gp->consumer)); 365130389Sle } 366130389Sle 367135173Sle mtx_lock(&d->bqueue_mtx); 368130389Sle } 369135173Sle 370135173Sle TAILQ_FOREACH_SAFE(bq, &d->bqueue, queue, bq2) { 371135173Sle TAILQ_REMOVE(&d->bqueue, bq, queue); 372135173Sle mtx_unlock(&d->bqueue_mtx); 373135173Sle bp = bq->bp; 374135173Sle g_free(bq); 375135173Sle if (bp->bio_cflags & GV_BIO_DONE) 376135173Sle g_std_done(bp); 377135173Sle else 378135173Sle g_io_deliver(bp, ENXIO); 379135173Sle mtx_lock(&d->bqueue_mtx); 380135173Sle } 381135173Sle mtx_unlock(&d->bqueue_mtx); 382135173Sle d->flags |= GV_DRIVE_THREAD_DEAD; 383135173Sle 384135173Sle kthread_exit(ENXIO); 385130389Sle} 386130389Sle 387135173Sle 388130389Slestatic void 389130389Slegv_drive_orphan(struct g_consumer *cp) 390130389Sle{ 391130389Sle struct g_geom *gp; 392130597Sle struct gv_drive *d; 393130389Sle 394130389Sle g_topology_assert(); 395130389Sle gp = cp->geom; 396130389Sle g_trace(G_T_TOPOLOGY, "gv_drive_orphan(%s)", gp->name); 397130597Sle d = gp->softc; 398130697Sle if (d != NULL) { 399135162Sle gv_set_drive_state(d, GV_DRIVE_DOWN, 400135162Sle GV_SETSTATE_FORCE | GV_SETSTATE_CONFIG); 401146325Sle g_post_event(gv_drive_dead, d, M_WAITOK, d, NULL); 402146325Sle } else 403146325Sle g_wither_geom(gp, ENXIO); 404130389Sle} 405130389Sle 406130389Slestatic struct g_geom * 407130389Slegv_drive_taste(struct g_class *mp, struct g_provider *pp, int flags __unused) 408130389Sle{ 409130389Sle struct g_geom *gp, *gp2; 410130389Sle struct g_consumer *cp; 411130389Sle struct gv_drive *d; 412130389Sle struct gv_sd *s; 413130389Sle struct gv_softc *sc; 414130389Sle struct gv_freelist *fl; 415130389Sle struct gv_hdr *vhdr; 416130389Sle int error; 417132642Sle char *buf, errstr[ERRBUFSIZ]; 418130389Sle 419130389Sle vhdr = NULL; 420130389Sle d = NULL; 421130389Sle 422130389Sle g_trace(G_T_TOPOLOGY, "gv_drive_taste(%s, %s)", mp->name, pp->name); 423130389Sle g_topology_assert(); 424130389Sle 425130389Sle /* Find the VINUM class and its associated geom. */ 426130389Sle gp2 = find_vinum_geom(); 427130389Sle if (gp2 == NULL) 428130389Sle return (NULL); 429130389Sle sc = gp2->softc; 430130389Sle 431130389Sle gp = g_new_geomf(mp, "%s.vinumdrive", pp->name); 432133983Sle gp->start = gv_drive_start; 433133983Sle gp->orphan = gv_drive_orphan; 434133983Sle gp->access = gv_drive_access; 435133983Sle gp->start = gv_drive_start; 436130389Sle 437130389Sle cp = g_new_consumer(gp); 438130389Sle g_attach(cp, pp); 439130389Sle error = g_access(cp, 1, 0, 0); 440130389Sle if (error) { 441130389Sle g_detach(cp); 442130389Sle g_destroy_consumer(cp); 443130389Sle g_destroy_geom(gp); 444130389Sle return (NULL); 445130389Sle } 446130389Sle 447130389Sle g_topology_unlock(); 448130389Sle 449130389Sle /* Now check if the provided slice is a valid vinum drive. */ 450130389Sle do { 451135161Sle vhdr = g_read_data(cp, GV_HDR_OFFSET, pp->sectorsize, &error); 452130389Sle if (vhdr == NULL || error != 0) 453130389Sle break; 454130389Sle if (vhdr->magic != GV_MAGIC) { 455130389Sle g_free(vhdr); 456130389Sle break; 457130389Sle } 458130389Sle 459130389Sle /* 460130389Sle * We have found a valid vinum drive. Let's see if it is 461132642Sle * already known in the configuration. There's a chance that 462132642Sle * the VINUMDRIVE class tastes before the VINUM class could 463132642Sle * taste, so parse the configuration here too, just to be on 464132642Sle * the safe side. 465130389Sle */ 466132642Sle buf = g_read_data(cp, GV_CFG_OFFSET, GV_CFG_LEN, &error); 467132642Sle if (buf == NULL || error != 0) { 468132642Sle g_free(vhdr); 469132642Sle break; 470132642Sle } 471133449Sle g_topology_lock(); 472132642Sle gv_parse_config(sc, buf, 1); 473132642Sle g_free(buf); 474132642Sle 475130389Sle d = gv_find_drive(sc, vhdr->label.name); 476130389Sle 477130389Sle /* We already know about this drive. */ 478130389Sle if (d != NULL) { 479133983Sle /* Check if this drive already has a geom. */ 480133983Sle if (d->geom != NULL) { 481133983Sle g_topology_unlock(); 482133983Sle break; 483133983Sle } 484130389Sle bcopy(vhdr, d->hdr, sizeof(*vhdr)); 485130389Sle 486130389Sle /* This is a new drive. */ 487130389Sle } else { 488130389Sle d = g_malloc(sizeof(*d), M_WAITOK | M_ZERO); 489130389Sle 490130389Sle /* Initialize all needed variables. */ 491130389Sle d->size = pp->mediasize - GV_DATA_START; 492130389Sle d->avail = d->size; 493130389Sle d->hdr = vhdr; 494130389Sle strncpy(d->name, vhdr->label.name, GV_MAXDRIVENAME); 495130389Sle LIST_INIT(&d->subdisks); 496130389Sle LIST_INIT(&d->freelist); 497130389Sle 498130389Sle /* We also need a freelist entry. */ 499130389Sle fl = g_malloc(sizeof(*fl), M_WAITOK | M_ZERO); 500130389Sle fl->offset = GV_DATA_START; 501130389Sle fl->size = d->avail; 502130389Sle LIST_INSERT_HEAD(&d->freelist, fl, freelist); 503130389Sle d->freelist_entries = 1; 504130389Sle 505135173Sle TAILQ_INIT(&d->bqueue); 506140475Sle 507140475Sle /* Save it into the main configuration. */ 508140475Sle LIST_INSERT_HEAD(&sc->drives, d, drive); 509140475Sle } 510140475Sle 511140475Sle /* 512140475Sle * Create a bio queue mutex and a worker thread, if necessary. 513140475Sle */ 514140475Sle if (mtx_initialized(&d->bqueue_mtx) == 0) 515135173Sle mtx_init(&d->bqueue_mtx, "gv_drive", NULL, MTX_DEF); 516140475Sle 517140475Sle if (!(d->flags & GV_DRIVE_THREAD_ACTIVE)) { 518135173Sle kthread_create(gv_drive_worker, d, NULL, 0, 0, 519135173Sle "gv_d %s", d->name); 520135173Sle d->flags |= GV_DRIVE_THREAD_ACTIVE; 521130389Sle } 522130389Sle 523133983Sle g_access(cp, -1, 0, 0); 524132617Sle 525130389Sle gp->softc = d; 526130389Sle d->geom = gp; 527135173Sle d->vinumconf = sc; 528130389Sle strncpy(d->device, pp->name, GV_MAXDRIVENAME); 529130389Sle 530130389Sle /* 531130389Sle * Find out which subdisks belong to this drive and crosslink 532130389Sle * them. 533130389Sle */ 534130389Sle LIST_FOREACH(s, &sc->subdisks, sd) { 535130389Sle if (!strncmp(s->drive, d->name, GV_MAXDRIVENAME)) 536130389Sle /* XXX: errors ignored */ 537130389Sle gv_sd_to_drive(sc, d, s, errstr, 538130389Sle sizeof(errstr)); 539130389Sle } 540130389Sle 541130389Sle /* This drive is now up for sure. */ 542130389Sle gv_set_drive_state(d, GV_DRIVE_UP, 0); 543130389Sle 544130389Sle /* 545130389Sle * If there are subdisks on this drive, we need to create 546130389Sle * providers for them. 547130389Sle */ 548130389Sle if (d->sdcount) 549130389Sle gv_drive_modify(d); 550130389Sle 551130389Sle return (gp); 552130389Sle 553130389Sle } while (0); 554130389Sle 555130389Sle g_topology_lock(); 556130389Sle g_access(cp, -1, 0, 0); 557130389Sle 558130389Sle g_detach(cp); 559130389Sle g_destroy_consumer(cp); 560130389Sle g_destroy_geom(gp); 561130389Sle return (NULL); 562130389Sle} 563130389Sle 564130389Sle/* 565130389Sle * Modify the providers for the given drive 'd'. It is assumed that the 566130389Sle * subdisk list of 'd' is already correctly set up. 567130389Sle */ 568130389Slevoid 569130389Slegv_drive_modify(struct gv_drive *d) 570130389Sle{ 571130389Sle struct g_geom *gp; 572130389Sle struct g_consumer *cp; 573130389Sle struct g_provider *pp, *pp2; 574130389Sle struct gv_sd *s; 575130389Sle 576130389Sle KASSERT(d != NULL, ("gv_drive_modify: null d")); 577130389Sle gp = d->geom; 578130389Sle KASSERT(gp != NULL, ("gv_drive_modify: null gp")); 579130389Sle cp = LIST_FIRST(&gp->consumer); 580130389Sle KASSERT(cp != NULL, ("gv_drive_modify: null cp")); 581130389Sle pp = cp->provider; 582130389Sle KASSERT(pp != NULL, ("gv_drive_modify: null pp")); 583130389Sle 584130389Sle g_topology_assert(); 585130389Sle 586130389Sle LIST_FOREACH(s, &d->subdisks, from_drive) { 587130389Sle /* This subdisk already has a provider. */ 588130389Sle if (s->provider != NULL) 589130389Sle continue; 590130389Sle pp2 = g_new_providerf(gp, "gvinum/sd/%s", s->name); 591130389Sle pp2->mediasize = s->size; 592130389Sle pp2->sectorsize = pp->sectorsize; 593130389Sle g_error_provider(pp2, 0); 594130389Sle s->provider = pp2; 595130389Sle pp2->private = s; 596130389Sle } 597130389Sle} 598130389Sle 599146325Slestatic void 600146325Slegv_drive_dead(void *arg, int flag) 601146325Sle{ 602146325Sle struct g_geom *gp; 603146325Sle struct g_consumer *cp; 604146325Sle struct gv_drive *d; 605146325Sle struct gv_sd *s; 606146325Sle 607146325Sle g_topology_assert(); 608146325Sle KASSERT(arg != NULL, ("gv_drive_dead: NULL arg")); 609146325Sle 610146325Sle if (flag == EV_CANCEL) 611146325Sle return; 612146325Sle 613146325Sle d = arg; 614146325Sle if (d->state != GV_DRIVE_DOWN) 615146325Sle return; 616146325Sle 617146325Sle g_trace(G_T_TOPOLOGY, "gv_drive_dead(%s)", d->name); 618146325Sle 619146325Sle gp = d->geom; 620146325Sle if (gp == NULL) 621146325Sle return; 622146325Sle 623146325Sle LIST_FOREACH(cp, &gp->consumer, consumer) { 624146325Sle if (cp->nstart != cp->nend) { 625146325Sle printf("GEOM_VINUM: dead drive '%s' has still " 626146325Sle "active requests, can't detach consumer\n", 627146325Sle d->name); 628146325Sle g_post_event(gv_drive_dead, d, M_WAITOK, d, 629146325Sle NULL); 630146325Sle return; 631146325Sle } 632146325Sle if (cp->acr != 0 || cp->acw != 0 || cp->ace != 0) 633146325Sle g_access(cp, -cp->acr, -cp->acw, -cp->ace); 634146325Sle } 635146325Sle 636146325Sle printf("GEOM_VINUM: lost drive '%s'\n", d->name); 637146325Sle d->geom = NULL; 638146325Sle LIST_FOREACH(s, &d->subdisks, from_drive) { 639146325Sle s->provider = NULL; 640146325Sle s->consumer = NULL; 641146325Sle } 642146325Sle gv_kill_drive_thread(d); 643146325Sle gp->softc = NULL; 644146325Sle g_wither_geom(gp, ENXIO); 645146325Sle} 646146325Sle 647130389Slestatic int 648130389Slegv_drive_destroy_geom(struct gctl_req *req, struct g_class *mp, 649130389Sle struct g_geom *gp) 650130389Sle{ 651135173Sle struct gv_drive *d; 652135173Sle 653130389Sle g_trace(G_T_TOPOLOGY, "gv_drive_destroy_geom: %s", gp->name); 654130389Sle g_topology_assert(); 655130389Sle 656135173Sle d = gp->softc; 657135173Sle gv_kill_drive_thread(d); 658135173Sle 659130389Sle g_wither_geom(gp, ENXIO); 660130389Sle return (0); 661130389Sle} 662130389Sle 663130389Sle#define VINUMDRIVE_CLASS_NAME "VINUMDRIVE" 664130389Sle 665130389Slestatic struct g_class g_vinum_drive_class = { 666130389Sle .name = VINUMDRIVE_CLASS_NAME, 667133318Sphk .version = G_VERSION, 668130389Sle .taste = gv_drive_taste, 669130389Sle .destroy_geom = gv_drive_destroy_geom 670130389Sle}; 671130389Sle 672130389SleDECLARE_GEOM_CLASS(g_vinum_drive_class, g_vinum_drive); 673