g_stripe.c revision 133373
1129473Spjd/*- 2129473Spjd * Copyright (c) 2003 Pawel Jakub Dawidek <pjd@FreeBSD.org> 3129473Spjd * All rights reserved. 4129473Spjd * 5129473Spjd * Redistribution and use in source and binary forms, with or without 6129473Spjd * modification, are permitted provided that the following conditions 7129473Spjd * are met: 8129473Spjd * 1. Redistributions of source code must retain the above copyright 9129473Spjd * notice, this list of conditions and the following disclaimer. 10129473Spjd * 2. Redistributions in binary form must reproduce the above copyright 11129473Spjd * notice, this list of conditions and the following disclaimer in the 12129473Spjd * documentation and/or other materials provided with the distribution. 13129473Spjd * 14129473Spjd * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 15129473Spjd * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16129473Spjd * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17129473Spjd * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 18129473Spjd * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19129473Spjd * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20129473Spjd * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21129473Spjd * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22129473Spjd * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23129473Spjd * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24129473Spjd * SUCH DAMAGE. 25129473Spjd */ 26129473Spjd 27129473Spjd#include <sys/cdefs.h> 28129473Spjd__FBSDID("$FreeBSD: head/sys/geom/stripe/g_stripe.c 133373 2004-08-09 11:29:42Z pjd $"); 29129473Spjd 30129473Spjd#include <sys/param.h> 31129473Spjd#include <sys/systm.h> 32129473Spjd#include <sys/kernel.h> 33129473Spjd#include <sys/module.h> 34129473Spjd#include <sys/lock.h> 35129473Spjd#include <sys/mutex.h> 36129473Spjd#include <sys/bio.h> 37129473Spjd#include <sys/sysctl.h> 38129473Spjd#include <sys/malloc.h> 39131878Spjd#include <vm/uma.h> 40129473Spjd#include <geom/geom.h> 41129473Spjd#include <geom/stripe/g_stripe.h> 42129473Spjd 43129473Spjd 44131878Spjd#define MAX_IO_SIZE (DFLTPHYS * 2) 45129473Spjdstatic MALLOC_DEFINE(M_STRIPE, "stripe data", "GEOM_STRIPE Data"); 46129473Spjd 47131878Spjdstatic uma_zone_t g_stripe_zone; 48129473Spjd 49129473Spjdstatic int g_stripe_destroy(struct g_stripe_softc *sc, boolean_t force); 50129473Spjdstatic int g_stripe_destroy_geom(struct gctl_req *req, struct g_class *mp, 51129473Spjd struct g_geom *gp); 52129473Spjd 53129473Spjdstatic g_taste_t g_stripe_taste; 54129473Spjdstatic g_ctl_req_t g_stripe_config; 55129473Spjdstatic g_dumpconf_t g_stripe_dumpconf; 56131878Spjdstatic g_init_t g_stripe_init; 57131878Spjdstatic g_fini_t g_stripe_fini; 58129473Spjd 59129473Spjdstruct g_class g_stripe_class = { 60129473Spjd .name = G_STRIPE_CLASS_NAME, 61133318Sphk .version = G_VERSION, 62129473Spjd .ctlreq = g_stripe_config, 63129473Spjd .taste = g_stripe_taste, 64131878Spjd .destroy_geom = g_stripe_destroy_geom, 65131878Spjd .init = g_stripe_init, 66131878Spjd .fini = g_stripe_fini 67129473Spjd}; 68129473Spjd 69131878SpjdSYSCTL_DECL(_kern_geom); 70131878SpjdSYSCTL_NODE(_kern_geom, OID_AUTO, stripe, CTLFLAG_RW, 0, "GEOM_STRIPE stuff"); 71131878Spjdstatic u_int g_stripe_debug = 0; 72131878SpjdSYSCTL_UINT(_kern_geom_stripe, OID_AUTO, debug, CTLFLAG_RW, &g_stripe_debug, 0, 73131878Spjd "Debug level"); 74131878Spjdstatic int g_stripe_fast = 1; 75131878SpjdTUNABLE_INT("kern.geom.stripe.fast", &g_stripe_fast); 76131878Spjdstatic int 77131878Spjdg_sysctl_stripe_fast(SYSCTL_HANDLER_ARGS) 78131878Spjd{ 79131878Spjd int error, fast; 80129473Spjd 81131878Spjd fast = g_stripe_fast; 82131878Spjd error = sysctl_handle_int(oidp, &fast, sizeof(fast), req); 83131878Spjd if (error == 0 && req->newptr != NULL) 84131878Spjd g_stripe_fast = fast; 85131878Spjd return (error); 86131878Spjd} 87131878SpjdSYSCTL_PROC(_kern_geom_stripe, OID_AUTO, fast, CTLTYPE_INT | CTLFLAG_RW, 88132095Spjd NULL, 0, g_sysctl_stripe_fast, "I", "Fast, but memory-consuming, mode"); 89131878Spjdstatic u_int g_stripe_maxmem = MAX_IO_SIZE * 10; 90131878SpjdTUNABLE_INT("kern.geom.stripe.maxmem", &g_stripe_maxmem); 91131878SpjdSYSCTL_UINT(_kern_geom_stripe, OID_AUTO, maxmem, CTLFLAG_RD, &g_stripe_maxmem, 92132095Spjd 0, "Maximum memory that can be allocated in \"fast\" mode (in bytes)"); 93133205Spjdstatic u_int g_stripe_fast_failed = 0; 94133205SpjdSYSCTL_UINT(_kern_geom_stripe, OID_AUTO, fast_failed, CTLFLAG_RD, 95133205Spjd &g_stripe_fast_failed, 0, "How many times \"fast\" mode failed"); 96131878Spjd 97129473Spjd/* 98129473Spjd * Greatest Common Divisor. 99129473Spjd */ 100129473Spjdstatic u_int 101129473Spjdgcd(u_int a, u_int b) 102129473Spjd{ 103129473Spjd u_int c; 104129473Spjd 105129473Spjd while (b != 0) { 106129473Spjd c = a; 107129473Spjd a = b; 108129473Spjd b = (c % b); 109129473Spjd } 110129473Spjd return (a); 111129473Spjd} 112129473Spjd 113129473Spjd/* 114129473Spjd * Least Common Multiple. 115129473Spjd */ 116129473Spjdstatic u_int 117129473Spjdlcm(u_int a, u_int b) 118129473Spjd{ 119129473Spjd 120129473Spjd return ((a * b) / gcd(a, b)); 121129473Spjd} 122129473Spjd 123131878Spjdstatic void 124131878Spjdg_stripe_init(struct g_class *mp __unused) 125131878Spjd{ 126131878Spjd 127131878Spjd g_stripe_zone = uma_zcreate("g_stripe_zone", MAX_IO_SIZE, NULL, NULL, 128131878Spjd NULL, NULL, 0, 0); 129131878Spjd g_stripe_maxmem -= g_stripe_maxmem % MAX_IO_SIZE; 130131878Spjd uma_zone_set_max(g_stripe_zone, g_stripe_maxmem / MAX_IO_SIZE); 131131878Spjd} 132131878Spjd 133131878Spjdstatic void 134131878Spjdg_stripe_fini(struct g_class *mp __unused) 135131878Spjd{ 136131878Spjd 137131878Spjd uma_zdestroy(g_stripe_zone); 138131878Spjd} 139131878Spjd 140129473Spjd/* 141129473Spjd * Return the number of valid disks. 142129473Spjd */ 143129473Spjdstatic u_int 144129473Spjdg_stripe_nvalid(struct g_stripe_softc *sc) 145129473Spjd{ 146129473Spjd u_int i, no; 147129473Spjd 148129473Spjd no = 0; 149129473Spjd for (i = 0; i < sc->sc_ndisks; i++) { 150129473Spjd if (sc->sc_disks[i] != NULL) 151129473Spjd no++; 152129473Spjd } 153129473Spjd 154129473Spjd return (no); 155129473Spjd} 156129473Spjd 157129473Spjdstatic void 158129473Spjdg_stripe_remove_disk(struct g_consumer *cp) 159129473Spjd{ 160129473Spjd struct g_stripe_softc *sc; 161129473Spjd u_int no; 162129473Spjd 163129473Spjd KASSERT(cp != NULL, ("Non-valid disk in %s.", __func__)); 164129473Spjd sc = (struct g_stripe_softc *)cp->private; 165129473Spjd KASSERT(sc != NULL, ("NULL sc in %s.", __func__)); 166129473Spjd no = cp->index; 167129473Spjd 168129473Spjd G_STRIPE_DEBUG(0, "Disk %s removed from %s.", cp->provider->name, 169132664Spjd sc->sc_name); 170129473Spjd 171129473Spjd sc->sc_disks[no] = NULL; 172129473Spjd if (sc->sc_provider != NULL) { 173129473Spjd g_orphan_provider(sc->sc_provider, ENXIO); 174129473Spjd sc->sc_provider = NULL; 175132664Spjd G_STRIPE_DEBUG(0, "Device %s removed.", sc->sc_name); 176129473Spjd } 177129473Spjd 178129473Spjd if (cp->acr > 0 || cp->acw > 0 || cp->ace > 0) 179129473Spjd g_access(cp, -cp->acr, -cp->acw, -cp->ace); 180129473Spjd g_detach(cp); 181129473Spjd g_destroy_consumer(cp); 182129473Spjd} 183129473Spjd 184129473Spjdstatic void 185129473Spjdg_stripe_orphan(struct g_consumer *cp) 186129473Spjd{ 187129473Spjd struct g_stripe_softc *sc; 188129473Spjd struct g_geom *gp; 189129473Spjd 190129473Spjd g_topology_assert(); 191129473Spjd gp = cp->geom; 192129473Spjd sc = gp->softc; 193129473Spjd if (sc == NULL) 194129473Spjd return; 195129473Spjd 196129473Spjd g_stripe_remove_disk(cp); 197129473Spjd /* If there are no valid disks anymore, remove device. */ 198129473Spjd if (g_stripe_nvalid(sc) == 0) 199129473Spjd g_stripe_destroy(sc, 1); 200129473Spjd} 201129473Spjd 202129473Spjdstatic int 203129473Spjdg_stripe_access(struct g_provider *pp, int dr, int dw, int de) 204129473Spjd{ 205129473Spjd struct g_consumer *cp1, *cp2; 206129473Spjd struct g_stripe_softc *sc; 207129473Spjd struct g_geom *gp; 208129473Spjd int error; 209129473Spjd 210129473Spjd gp = pp->geom; 211129473Spjd sc = gp->softc; 212129473Spjd 213129473Spjd if (sc == NULL) { 214129473Spjd /* 215129473Spjd * It looks like geom is being withered. 216129473Spjd * In that case we allow only negative requests. 217129473Spjd */ 218129473Spjd KASSERT(dr <= 0 && dw <= 0 && de <= 0, 219129473Spjd ("Positive access request (device=%s).", pp->name)); 220129473Spjd if ((pp->acr + dr) == 0 && (pp->acw + dw) == 0 && 221129473Spjd (pp->ace + de) == 0) { 222129473Spjd G_STRIPE_DEBUG(0, "Device %s definitely destroyed.", 223129473Spjd gp->name); 224129473Spjd } 225129473Spjd return (0); 226129473Spjd } 227129473Spjd 228129473Spjd /* On first open, grab an extra "exclusive" bit */ 229129473Spjd if (pp->acr == 0 && pp->acw == 0 && pp->ace == 0) 230129473Spjd de++; 231129473Spjd /* ... and let go of it on last close */ 232129473Spjd if ((pp->acr + dr) == 0 && (pp->acw + dw) == 0 && (pp->ace + de) == 0) 233129473Spjd de--; 234129473Spjd 235129473Spjd error = ENXIO; 236129473Spjd LIST_FOREACH(cp1, &gp->consumer, consumer) { 237129473Spjd error = g_access(cp1, dr, dw, de); 238129473Spjd if (error == 0) 239129473Spjd continue; 240129473Spjd /* 241129473Spjd * If we fail here, backout all previous changes. 242129473Spjd */ 243129473Spjd LIST_FOREACH(cp2, &gp->consumer, consumer) { 244129473Spjd if (cp1 == cp2) 245129473Spjd return (error); 246129473Spjd g_access(cp2, -dr, -dw, -de); 247129473Spjd } 248129473Spjd /* NOTREACHED */ 249129473Spjd } 250129473Spjd 251129473Spjd return (error); 252129473Spjd} 253129473Spjd 254129473Spjdstatic void 255131878Spjdg_stripe_copy(struct g_stripe_softc *sc, char *src, char *dst, off_t offset, 256131878Spjd off_t length, int mode) 257129473Spjd{ 258131878Spjd u_int stripesize; 259131878Spjd size_t len; 260131878Spjd 261131878Spjd stripesize = sc->sc_stripesize; 262131878Spjd len = (size_t)(stripesize - (offset & (stripesize - 1))); 263131878Spjd do { 264131878Spjd bcopy(src, dst, len); 265131878Spjd if (mode) { 266131878Spjd dst += len + stripesize * (sc->sc_ndisks - 1); 267131878Spjd src += len; 268131878Spjd } else { 269131878Spjd dst += len; 270131878Spjd src += len + stripesize * (sc->sc_ndisks - 1); 271131878Spjd } 272131878Spjd length -= len; 273131878Spjd KASSERT(length >= 0, 274131878Spjd ("Length < 0 (stripesize=%zu, offset=%jd, length=%jd).", 275131878Spjd (size_t)stripesize, (intmax_t)offset, (intmax_t)length)); 276131878Spjd if (length > stripesize) 277131878Spjd len = stripesize; 278131878Spjd else 279131878Spjd len = length; 280131878Spjd } while (length > 0); 281131878Spjd} 282131878Spjd 283131878Spjdstatic void 284131878Spjdg_stripe_done(struct bio *bp) 285131878Spjd{ 286129473Spjd struct g_stripe_softc *sc; 287131878Spjd struct bio *pbp; 288131878Spjd 289131878Spjd pbp = bp->bio_parent; 290131878Spjd sc = pbp->bio_to->geom->softc; 291131878Spjd if (pbp->bio_error == 0) 292131878Spjd pbp->bio_error = bp->bio_error; 293131878Spjd pbp->bio_completed += bp->bio_completed; 294133204Spjd if (bp->bio_cmd == BIO_READ && bp->bio_caller1 != NULL) { 295133204Spjd g_stripe_copy(sc, bp->bio_data, bp->bio_caller1, bp->bio_offset, 296131878Spjd bp->bio_length, 1); 297133204Spjd bp->bio_data = bp->bio_caller1; 298133204Spjd bp->bio_caller1 = NULL; 299131878Spjd } 300131878Spjd g_destroy_bio(bp); 301131878Spjd pbp->bio_inbed++; 302131878Spjd if (pbp->bio_children == pbp->bio_inbed) { 303133204Spjd if (pbp->bio_driver1 != NULL) 304133204Spjd uma_zfree(g_stripe_zone, pbp->bio_driver1); 305131878Spjd g_io_deliver(pbp, pbp->bio_error); 306131878Spjd } 307131878Spjd} 308131878Spjd 309131878Spjdstatic int 310131878Spjdg_stripe_start_fast(struct bio *bp, u_int no, off_t offset, off_t length) 311131878Spjd{ 312131878Spjd TAILQ_HEAD(, bio) queue = TAILQ_HEAD_INITIALIZER(queue); 313131878Spjd u_int nparts = 0, stripesize; 314131878Spjd struct g_stripe_softc *sc; 315131878Spjd char *addr, *data = NULL; 316129473Spjd struct bio *cbp; 317131878Spjd int error; 318131878Spjd 319131878Spjd sc = bp->bio_to->geom->softc; 320131878Spjd 321131878Spjd addr = bp->bio_data; 322131878Spjd stripesize = sc->sc_stripesize; 323131878Spjd 324131878Spjd cbp = g_clone_bio(bp); 325131878Spjd if (cbp == NULL) { 326131878Spjd error = ENOMEM; 327131878Spjd goto failure; 328131878Spjd } 329131878Spjd TAILQ_INSERT_TAIL(&queue, cbp, bio_queue); 330131878Spjd nparts++; 331131878Spjd /* 332131878Spjd * Fill in the component buf structure. 333131878Spjd */ 334131878Spjd cbp->bio_done = g_stripe_done; 335131878Spjd cbp->bio_offset = offset; 336131878Spjd cbp->bio_data = addr; 337133204Spjd cbp->bio_caller1 = NULL; 338131878Spjd cbp->bio_length = length; 339133204Spjd cbp->bio_caller2 = sc->sc_disks[no]; 340131878Spjd 341131878Spjd /* offset -= offset % stripesize; */ 342131878Spjd offset -= offset & (stripesize - 1); 343131878Spjd addr += length; 344131878Spjd length = bp->bio_length - length; 345131878Spjd for (no++; length > 0; no++, length -= stripesize, addr += stripesize) { 346131878Spjd if (no > sc->sc_ndisks - 1) { 347131878Spjd no = 0; 348131878Spjd offset += stripesize; 349131878Spjd } 350131878Spjd if (nparts >= sc->sc_ndisks) { 351131878Spjd cbp = TAILQ_NEXT(cbp, bio_queue); 352131878Spjd if (cbp == NULL) 353131878Spjd cbp = TAILQ_FIRST(&queue); 354131878Spjd nparts++; 355131878Spjd /* 356131878Spjd * Update bio structure. 357131878Spjd */ 358131878Spjd /* 359131878Spjd * MIN() is in case when 360131878Spjd * (bp->bio_length % sc->sc_stripesize) != 0. 361131878Spjd */ 362131878Spjd cbp->bio_length += MIN(stripesize, length); 363133204Spjd if (cbp->bio_caller1 == NULL) { 364133204Spjd cbp->bio_caller1 = cbp->bio_data; 365131878Spjd cbp->bio_data = NULL; 366131878Spjd if (data == NULL) { 367131878Spjd data = uma_zalloc(g_stripe_zone, 368131878Spjd M_NOWAIT); 369131878Spjd if (data == NULL) { 370131878Spjd error = ENOMEM; 371131878Spjd goto failure; 372131878Spjd } 373131878Spjd } 374131878Spjd } 375131878Spjd } else { 376131878Spjd cbp = g_clone_bio(bp); 377131878Spjd if (cbp == NULL) { 378131878Spjd error = ENOMEM; 379131878Spjd goto failure; 380131878Spjd } 381131878Spjd TAILQ_INSERT_TAIL(&queue, cbp, bio_queue); 382131878Spjd nparts++; 383131878Spjd /* 384131878Spjd * Fill in the component buf structure. 385131878Spjd */ 386131878Spjd cbp->bio_done = g_stripe_done; 387131878Spjd cbp->bio_offset = offset; 388131878Spjd cbp->bio_data = addr; 389133204Spjd cbp->bio_caller1 = NULL; 390131878Spjd /* 391131878Spjd * MIN() is in case when 392131878Spjd * (bp->bio_length % sc->sc_stripesize) != 0. 393131878Spjd */ 394131878Spjd cbp->bio_length = MIN(stripesize, length); 395133204Spjd cbp->bio_caller2 = sc->sc_disks[no]; 396131878Spjd } 397131878Spjd } 398131878Spjd if (data != NULL) 399131878Spjd bp->bio_caller1 = data; 400131878Spjd /* 401131878Spjd * Fire off all allocated requests! 402131878Spjd */ 403131878Spjd while ((cbp = TAILQ_FIRST(&queue)) != NULL) { 404131878Spjd struct g_consumer *cp; 405131878Spjd 406131878Spjd TAILQ_REMOVE(&queue, cbp, bio_queue); 407133204Spjd cp = cbp->bio_caller2; 408133204Spjd cbp->bio_caller2 = NULL; 409131878Spjd cbp->bio_to = cp->provider; 410133204Spjd if (cbp->bio_caller1 != NULL) { 411131878Spjd cbp->bio_data = data; 412131878Spjd if (bp->bio_cmd == BIO_WRITE) { 413133204Spjd g_stripe_copy(sc, cbp->bio_caller1, data, 414131878Spjd cbp->bio_offset, cbp->bio_length, 0); 415131878Spjd } 416131878Spjd data += cbp->bio_length; 417131878Spjd } 418131878Spjd G_STRIPE_LOGREQ(cbp, "Sending request."); 419131878Spjd g_io_request(cbp, cp); 420131878Spjd } 421131878Spjd return (0); 422131878Spjdfailure: 423131878Spjd if (data != NULL) 424131878Spjd uma_zfree(g_stripe_zone, data); 425131878Spjd while ((cbp = TAILQ_FIRST(&queue)) != NULL) { 426131878Spjd TAILQ_REMOVE(&queue, cbp, bio_queue); 427133204Spjd if (cbp->bio_caller1 != NULL) { 428133204Spjd cbp->bio_data = cbp->bio_caller1; 429133204Spjd cbp->bio_caller1 = NULL; 430131878Spjd } 431133201Spjd bp->bio_children--; 432131878Spjd g_destroy_bio(cbp); 433131878Spjd } 434131878Spjd return (error); 435131878Spjd} 436131878Spjd 437131878Spjdstatic int 438131878Spjdg_stripe_start_economic(struct bio *bp, u_int no, off_t offset, off_t length) 439131878Spjd{ 440131878Spjd TAILQ_HEAD(, bio) queue = TAILQ_HEAD_INITIALIZER(queue); 441131878Spjd struct g_stripe_softc *sc; 442129473Spjd uint32_t stripesize; 443131878Spjd struct bio *cbp; 444129473Spjd char *addr; 445131878Spjd int error; 446129473Spjd 447131878Spjd sc = bp->bio_to->geom->softc; 448131878Spjd 449131878Spjd addr = bp->bio_data; 450131878Spjd stripesize = sc->sc_stripesize; 451131878Spjd 452131878Spjd cbp = g_clone_bio(bp); 453131878Spjd if (cbp == NULL) { 454131878Spjd error = ENOMEM; 455131878Spjd goto failure; 456131878Spjd } 457131878Spjd TAILQ_INSERT_TAIL(&queue, cbp, bio_queue); 458129473Spjd /* 459131878Spjd * Fill in the component buf structure. 460131878Spjd */ 461131878Spjd cbp->bio_done = g_std_done; 462131878Spjd cbp->bio_offset = offset; 463131878Spjd cbp->bio_data = addr; 464131878Spjd cbp->bio_length = length; 465133204Spjd cbp->bio_caller2 = sc->sc_disks[no]; 466131878Spjd 467131878Spjd /* offset -= offset % stripesize; */ 468131878Spjd offset -= offset & (stripesize - 1); 469131878Spjd addr += length; 470131878Spjd length = bp->bio_length - length; 471131878Spjd for (no++; length > 0; no++, length -= stripesize, addr += stripesize) { 472131878Spjd if (no > sc->sc_ndisks - 1) { 473131878Spjd no = 0; 474131878Spjd offset += stripesize; 475131878Spjd } 476131878Spjd cbp = g_clone_bio(bp); 477131878Spjd if (cbp == NULL) { 478131878Spjd error = ENOMEM; 479131878Spjd goto failure; 480131878Spjd } 481131878Spjd TAILQ_INSERT_TAIL(&queue, cbp, bio_queue); 482131878Spjd 483131878Spjd /* 484131878Spjd * Fill in the component buf structure. 485131878Spjd */ 486131878Spjd cbp->bio_done = g_std_done; 487131878Spjd cbp->bio_offset = offset; 488131878Spjd cbp->bio_data = addr; 489131878Spjd /* 490131878Spjd * MIN() is in case when 491131878Spjd * (bp->bio_length % sc->sc_stripesize) != 0. 492131878Spjd */ 493131878Spjd cbp->bio_length = MIN(stripesize, length); 494131878Spjd 495133204Spjd cbp->bio_caller2 = sc->sc_disks[no]; 496131878Spjd } 497131878Spjd /* 498131878Spjd * Fire off all allocated requests! 499131878Spjd */ 500131878Spjd while ((cbp = TAILQ_FIRST(&queue)) != NULL) { 501131878Spjd struct g_consumer *cp; 502131878Spjd 503131878Spjd TAILQ_REMOVE(&queue, cbp, bio_queue); 504133204Spjd cp = cbp->bio_caller2; 505133204Spjd cbp->bio_caller2 = NULL; 506131878Spjd cbp->bio_to = cp->provider; 507131878Spjd G_STRIPE_LOGREQ(cbp, "Sending request."); 508131878Spjd g_io_request(cbp, cp); 509131878Spjd } 510131878Spjd return (0); 511131878Spjdfailure: 512131878Spjd while ((cbp = TAILQ_FIRST(&queue)) != NULL) { 513131878Spjd TAILQ_REMOVE(&queue, cbp, bio_queue); 514133201Spjd bp->bio_children--; 515131878Spjd g_destroy_bio(cbp); 516131878Spjd } 517131878Spjd return (error); 518131878Spjd} 519131878Spjd 520131878Spjdstatic void 521131878Spjdg_stripe_start(struct bio *bp) 522131878Spjd{ 523131878Spjd off_t offset, start, length, nstripe; 524131878Spjd struct g_stripe_softc *sc; 525131878Spjd u_int no, stripesize; 526131878Spjd int error, fast = 0; 527131878Spjd 528131878Spjd sc = bp->bio_to->geom->softc; 529131878Spjd /* 530129473Spjd * If sc == NULL, provider's error should be set and g_stripe_start() 531129473Spjd * should not be called at all. 532129473Spjd */ 533129473Spjd KASSERT(sc != NULL, 534129473Spjd ("Provider's error should be set (error=%d)(device=%s).", 535129473Spjd bp->bio_to->error, bp->bio_to->name)); 536129473Spjd 537129473Spjd G_STRIPE_LOGREQ(bp, "Request received."); 538129473Spjd 539129473Spjd switch (bp->bio_cmd) { 540129473Spjd case BIO_READ: 541129473Spjd case BIO_WRITE: 542129473Spjd case BIO_DELETE: 543129473Spjd /* 544129473Spjd * Only those requests are supported. 545129473Spjd */ 546129473Spjd break; 547129473Spjd case BIO_GETATTR: 548129473Spjd /* To which provider it should be delivered? */ 549129473Spjd default: 550129473Spjd g_io_deliver(bp, EOPNOTSUPP); 551129473Spjd return; 552129473Spjd } 553129473Spjd 554129473Spjd stripesize = sc->sc_stripesize; 555129473Spjd 556129473Spjd /* 557131878Spjd * Calculations are quite messy, but fast I hope. 558129473Spjd */ 559129473Spjd 560129473Spjd /* Stripe number. */ 561129473Spjd /* nstripe = bp->bio_offset / stripesize; */ 562129473Spjd nstripe = bp->bio_offset >> (off_t)sc->sc_stripebits; 563129473Spjd /* Disk number. */ 564129473Spjd no = nstripe % sc->sc_ndisks; 565129473Spjd /* Start position in stripe. */ 566129473Spjd /* start = bp->bio_offset % stripesize; */ 567129473Spjd start = bp->bio_offset & (stripesize - 1); 568129473Spjd /* Start position in disk. */ 569131878Spjd /* offset = (nstripe / sc->sc_ndisks) * stripesize + start; */ 570131878Spjd offset = ((nstripe / sc->sc_ndisks) << sc->sc_stripebits) + start; 571129473Spjd /* Length of data to operate. */ 572129473Spjd length = MIN(bp->bio_length, stripesize - start); 573129473Spjd 574131878Spjd /* 575131878Spjd * Do use "fast" mode when: 576131878Spjd * 1. "Fast" mode is ON. 577131878Spjd * and 578131878Spjd * 2. Request size is less than or equal to MAX_IO_SIZE (128kB), 579131878Spjd * which should always be true. 580131878Spjd * and 581131878Spjd * 3. Request size is bigger than stripesize * ndisks. If it isn't, 582131878Spjd * there will be no need to send more than one I/O request to 583131878Spjd * a provider, so there is nothing to optmize. 584131878Spjd */ 585131878Spjd if (g_stripe_fast && bp->bio_length <= MAX_IO_SIZE && 586131878Spjd bp->bio_length >= stripesize * sc->sc_ndisks) { 587131878Spjd fast = 1; 588129473Spjd } 589131878Spjd error = 0; 590133205Spjd if (fast) { 591131878Spjd error = g_stripe_start_fast(bp, no, offset, length); 592133205Spjd if (error != 0) 593133205Spjd g_stripe_fast_failed++; 594133205Spjd } 595129473Spjd /* 596131878Spjd * Do use "economic" when: 597131878Spjd * 1. "Economic" mode is ON. 598131878Spjd * or 599131878Spjd * 2. "Fast" mode failed. It can only failed if there is no memory. 600129473Spjd */ 601131878Spjd if (!fast || error != 0) 602131878Spjd error = g_stripe_start_economic(bp, no, offset, length); 603131878Spjd if (error != 0) { 604131878Spjd if (bp->bio_error == 0) 605131878Spjd bp->bio_error = error; 606131878Spjd g_io_deliver(bp, bp->bio_error); 607129473Spjd } 608129473Spjd} 609129473Spjd 610129473Spjdstatic void 611129473Spjdg_stripe_check_and_run(struct g_stripe_softc *sc) 612129473Spjd{ 613129473Spjd off_t mediasize, ms; 614129473Spjd u_int no, sectorsize = 0; 615129473Spjd 616129473Spjd if (g_stripe_nvalid(sc) != sc->sc_ndisks) 617129473Spjd return; 618129473Spjd 619132664Spjd sc->sc_provider = g_new_providerf(sc->sc_geom, "stripe/%s", 620132664Spjd sc->sc_name); 621129473Spjd /* 622129473Spjd * Find the smallest disk. 623129473Spjd */ 624129473Spjd mediasize = sc->sc_disks[0]->provider->mediasize; 625129473Spjd if (sc->sc_type == G_STRIPE_TYPE_AUTOMATIC) 626129473Spjd mediasize -= sc->sc_disks[0]->provider->sectorsize; 627129473Spjd mediasize -= mediasize % sc->sc_stripesize; 628129473Spjd sectorsize = sc->sc_disks[0]->provider->sectorsize; 629129473Spjd for (no = 1; no < sc->sc_ndisks; no++) { 630129473Spjd ms = sc->sc_disks[no]->provider->mediasize; 631129473Spjd if (sc->sc_type == G_STRIPE_TYPE_AUTOMATIC) 632129473Spjd ms -= sc->sc_disks[no]->provider->sectorsize; 633129473Spjd ms -= ms % sc->sc_stripesize; 634129473Spjd if (ms < mediasize) 635129473Spjd mediasize = ms; 636129473Spjd sectorsize = lcm(sectorsize, 637129473Spjd sc->sc_disks[no]->provider->sectorsize); 638129473Spjd } 639129473Spjd sc->sc_provider->sectorsize = sectorsize; 640129473Spjd sc->sc_provider->mediasize = mediasize * sc->sc_ndisks; 641129473Spjd g_error_provider(sc->sc_provider, 0); 642129473Spjd 643132664Spjd G_STRIPE_DEBUG(0, "Device %s activated.", sc->sc_name); 644129473Spjd} 645129473Spjd 646129473Spjdstatic int 647129473Spjdg_stripe_read_metadata(struct g_consumer *cp, struct g_stripe_metadata *md) 648129473Spjd{ 649129473Spjd struct g_provider *pp; 650129473Spjd u_char *buf; 651129473Spjd int error; 652129473Spjd 653129473Spjd g_topology_assert(); 654129473Spjd 655129473Spjd error = g_access(cp, 1, 0, 0); 656129473Spjd if (error != 0) 657129473Spjd return (error); 658129473Spjd pp = cp->provider; 659129473Spjd g_topology_unlock(); 660129473Spjd buf = g_read_data(cp, pp->mediasize - pp->sectorsize, pp->sectorsize, 661129473Spjd &error); 662129473Spjd g_topology_lock(); 663129473Spjd g_access(cp, -1, 0, 0); 664129473Spjd if (buf == NULL) 665129473Spjd return (error); 666129473Spjd 667129473Spjd /* Decode metadata. */ 668129473Spjd stripe_metadata_decode(buf, md); 669129473Spjd g_free(buf); 670129473Spjd 671129473Spjd return (0); 672129473Spjd} 673129473Spjd 674129473Spjd/* 675129473Spjd * Add disk to given device. 676129473Spjd */ 677129473Spjdstatic int 678129473Spjdg_stripe_add_disk(struct g_stripe_softc *sc, struct g_provider *pp, u_int no) 679129473Spjd{ 680129473Spjd struct g_consumer *cp, *fcp; 681129473Spjd struct g_geom *gp; 682129473Spjd int error; 683129473Spjd 684129473Spjd /* Metadata corrupted? */ 685129473Spjd if (no >= sc->sc_ndisks) 686129473Spjd return (EINVAL); 687129473Spjd 688129473Spjd /* Check if disk is not already attached. */ 689129473Spjd if (sc->sc_disks[no] != NULL) 690129473Spjd return (EEXIST); 691129473Spjd 692129473Spjd gp = sc->sc_geom; 693129473Spjd fcp = LIST_FIRST(&gp->consumer); 694129473Spjd 695129473Spjd cp = g_new_consumer(gp); 696129473Spjd error = g_attach(cp, pp); 697129473Spjd if (error != 0) { 698129473Spjd g_destroy_consumer(cp); 699129473Spjd return (error); 700129473Spjd } 701129473Spjd 702129473Spjd if (fcp != NULL && (fcp->acr > 0 || fcp->acw > 0 || fcp->ace > 0)) { 703129473Spjd error = g_access(cp, fcp->acr, fcp->acw, fcp->ace); 704129473Spjd if (error != 0) { 705129473Spjd g_detach(cp); 706129473Spjd g_destroy_consumer(cp); 707129473Spjd return (error); 708129473Spjd } 709129473Spjd } 710129473Spjd if (sc->sc_type == G_STRIPE_TYPE_AUTOMATIC) { 711129473Spjd struct g_stripe_metadata md; 712129473Spjd 713129473Spjd /* Reread metadata. */ 714129473Spjd error = g_stripe_read_metadata(cp, &md); 715129473Spjd if (error != 0) 716129473Spjd goto fail; 717129473Spjd 718129473Spjd if (strcmp(md.md_magic, G_STRIPE_MAGIC) != 0 || 719129473Spjd strcmp(md.md_name, sc->sc_name) != 0 || 720129473Spjd md.md_id != sc->sc_id) { 721129473Spjd G_STRIPE_DEBUG(0, "Metadata on %s changed.", pp->name); 722129473Spjd goto fail; 723129473Spjd } 724129473Spjd } 725129473Spjd 726129473Spjd cp->private = sc; 727129473Spjd cp->index = no; 728129473Spjd sc->sc_disks[no] = cp; 729129473Spjd 730132664Spjd G_STRIPE_DEBUG(0, "Disk %s attached to %s.", pp->name, sc->sc_name); 731129473Spjd 732129473Spjd g_stripe_check_and_run(sc); 733129473Spjd 734129473Spjd return (0); 735129473Spjdfail: 736129473Spjd if (fcp != NULL && (fcp->acr > 0 || fcp->acw > 0 || fcp->ace > 0)) 737129473Spjd g_access(cp, -fcp->acr, -fcp->acw, -fcp->ace); 738129473Spjd g_detach(cp); 739129473Spjd g_destroy_consumer(cp); 740129473Spjd return (error); 741129473Spjd} 742129473Spjd 743129473Spjdstatic struct g_geom * 744129473Spjdg_stripe_create(struct g_class *mp, const struct g_stripe_metadata *md, 745129473Spjd u_int type) 746129473Spjd{ 747129473Spjd struct g_stripe_softc *sc; 748129473Spjd struct g_geom *gp; 749129473Spjd u_int no; 750129473Spjd 751132664Spjd G_STRIPE_DEBUG(1, "Creating device %s (id=%u).", md->md_name, 752129473Spjd md->md_id); 753129473Spjd 754129473Spjd /* Two disks is minimum. */ 755132664Spjd if (md->md_all < 2) { 756132664Spjd G_STRIPE_DEBUG(0, "Too few disks defined for %s.", md->md_name); 757129473Spjd return (NULL); 758129473Spjd } 759129473Spjd#if 0 760129473Spjd /* Stripe size have to be grater than or equal to sector size. */ 761129473Spjd if (md->md_stripesize < sectorsize) { 762132664Spjd G_STRIPE_DEBUG(0, "Invalid stripe size for %s.", md->md_name); 763129473Spjd return (NULL); 764129473Spjd } 765129473Spjd#endif 766129473Spjd /* Stripe size have to be power of 2. */ 767129473Spjd if (!powerof2(md->md_stripesize)) { 768132664Spjd G_STRIPE_DEBUG(0, "Invalid stripe size for %s.", md->md_name); 769129473Spjd return (NULL); 770129473Spjd } 771129473Spjd 772129473Spjd /* Check for duplicate unit */ 773129473Spjd LIST_FOREACH(gp, &mp->geom, geom) { 774129473Spjd sc = gp->softc; 775129473Spjd if (sc != NULL && strcmp(sc->sc_name, md->md_name) == 0) { 776129473Spjd G_STRIPE_DEBUG(0, "Device %s already configured.", 777132664Spjd sc->sc_name); 778129473Spjd return (NULL); 779129473Spjd } 780129473Spjd } 781132664Spjd gp = g_new_geomf(mp, "%s", md->md_name); 782129473Spjd gp->softc = NULL; /* for a moment */ 783129473Spjd 784132662Spjd sc = malloc(sizeof(*sc), M_STRIPE, M_WAITOK | M_ZERO); 785129473Spjd gp->start = g_stripe_start; 786129473Spjd gp->spoiled = g_stripe_orphan; 787129473Spjd gp->orphan = g_stripe_orphan; 788129473Spjd gp->access = g_stripe_access; 789129473Spjd gp->dumpconf = g_stripe_dumpconf; 790129473Spjd 791129473Spjd sc->sc_id = md->md_id; 792129473Spjd sc->sc_stripesize = md->md_stripesize; 793129473Spjd sc->sc_stripebits = BITCOUNT(sc->sc_stripesize - 1); 794129473Spjd sc->sc_ndisks = md->md_all; 795129473Spjd sc->sc_disks = malloc(sizeof(struct g_consumer *) * sc->sc_ndisks, 796129473Spjd M_STRIPE, M_WAITOK | M_ZERO); 797129473Spjd for (no = 0; no < sc->sc_ndisks; no++) 798129473Spjd sc->sc_disks[no] = NULL; 799129473Spjd sc->sc_type = type; 800129473Spjd 801129473Spjd gp->softc = sc; 802129473Spjd sc->sc_geom = gp; 803129473Spjd sc->sc_provider = NULL; 804129473Spjd 805132664Spjd G_STRIPE_DEBUG(0, "Device %s created (id=%u).", sc->sc_name, sc->sc_id); 806129473Spjd 807129473Spjd return (gp); 808129473Spjd} 809129473Spjd 810129473Spjdstatic int 811129473Spjdg_stripe_destroy(struct g_stripe_softc *sc, boolean_t force) 812129473Spjd{ 813129473Spjd struct g_provider *pp; 814129473Spjd struct g_geom *gp; 815129473Spjd u_int no; 816129473Spjd 817129473Spjd g_topology_assert(); 818129473Spjd 819129473Spjd if (sc == NULL) 820129473Spjd return (ENXIO); 821129473Spjd 822129473Spjd pp = sc->sc_provider; 823129473Spjd if (pp != NULL && (pp->acr != 0 || pp->acw != 0 || pp->ace != 0)) { 824129473Spjd if (force) { 825129473Spjd G_STRIPE_DEBUG(0, "Device %s is still open, so it " 826129473Spjd "can't be definitely removed.", pp->name); 827129473Spjd } else { 828129473Spjd G_STRIPE_DEBUG(1, 829129473Spjd "Device %s is still open (r%dw%de%d).", pp->name, 830129473Spjd pp->acr, pp->acw, pp->ace); 831129473Spjd return (EBUSY); 832129473Spjd } 833129473Spjd } 834129473Spjd 835129473Spjd for (no = 0; no < sc->sc_ndisks; no++) { 836129473Spjd if (sc->sc_disks[no] != NULL) 837129473Spjd g_stripe_remove_disk(sc->sc_disks[no]); 838129473Spjd } 839129473Spjd 840129473Spjd gp = sc->sc_geom; 841129473Spjd gp->softc = NULL; 842129473Spjd KASSERT(sc->sc_provider == NULL, ("Provider still exists? (device=%s)", 843129473Spjd gp->name)); 844129473Spjd free(sc->sc_disks, M_STRIPE); 845129473Spjd free(sc, M_STRIPE); 846129473Spjd 847129473Spjd pp = LIST_FIRST(&gp->provider); 848129473Spjd if (pp == NULL || (pp->acr == 0 && pp->acw == 0 && pp->ace == 0)) 849129473Spjd G_STRIPE_DEBUG(0, "Device %s destroyed.", gp->name); 850129473Spjd 851129473Spjd g_wither_geom(gp, ENXIO); 852129473Spjd 853129473Spjd return (0); 854129473Spjd} 855129473Spjd 856129473Spjdstatic int 857129473Spjdg_stripe_destroy_geom(struct gctl_req *req __unused, 858129473Spjd struct g_class *mp __unused, struct g_geom *gp) 859129473Spjd{ 860129473Spjd struct g_stripe_softc *sc; 861129473Spjd 862129473Spjd sc = gp->softc; 863129473Spjd return (g_stripe_destroy(sc, 0)); 864129473Spjd} 865129473Spjd 866129473Spjdstatic struct g_geom * 867129473Spjdg_stripe_taste(struct g_class *mp, struct g_provider *pp, int flags __unused) 868129473Spjd{ 869129473Spjd struct g_stripe_metadata md; 870129473Spjd struct g_stripe_softc *sc; 871129473Spjd struct g_consumer *cp; 872129473Spjd struct g_geom *gp; 873129473Spjd int error; 874129473Spjd 875129473Spjd g_trace(G_T_TOPOLOGY, "%s(%s, %s)", __func__, mp->name, pp->name); 876129473Spjd g_topology_assert(); 877129473Spjd 878129473Spjd G_STRIPE_DEBUG(3, "Tasting %s.", pp->name); 879129473Spjd 880129473Spjd gp = g_new_geomf(mp, "stripe:taste"); 881129473Spjd gp->start = g_stripe_start; 882129473Spjd gp->access = g_stripe_access; 883129473Spjd gp->orphan = g_stripe_orphan; 884129473Spjd cp = g_new_consumer(gp); 885129473Spjd g_attach(cp, pp); 886129473Spjd error = g_stripe_read_metadata(cp, &md); 887133371Spjd g_detach(cp); 888133371Spjd g_destroy_consumer(cp); 889133371Spjd g_destroy_geom(gp); 890129473Spjd if (error != 0) 891129473Spjd return (NULL); 892129473Spjd gp = NULL; 893129473Spjd 894129473Spjd if (strcmp(md.md_magic, G_STRIPE_MAGIC) != 0) 895129473Spjd return (NULL); 896129473Spjd if (md.md_version > G_STRIPE_VERSION) { 897129473Spjd printf("geom_stripe.ko module is too old to handle %s.\n", 898129473Spjd pp->name); 899129473Spjd return (NULL); 900129473Spjd } 901133373Spjd /* 902133373Spjd * Backward compatibility: 903133373Spjd * There was no md_provider field in earlier versions of metadata. 904133373Spjd */ 905133373Spjd if (md.md_version < 2) 906133373Spjd bzero(md.md_provider, sizeof(md.md_provider)); 907129473Spjd 908133373Spjd if (md.md_provider[0] != '\0' && strcmp(md.md_provider, pp->name) != 0) 909133373Spjd return (NULL); 910133373Spjd 911129473Spjd /* 912129473Spjd * Let's check if device already exists. 913129473Spjd */ 914129473Spjd sc = NULL; 915129473Spjd LIST_FOREACH(gp, &mp->geom, geom) { 916129473Spjd sc = gp->softc; 917129473Spjd if (sc == NULL) 918129473Spjd continue; 919129473Spjd if (sc->sc_type != G_STRIPE_TYPE_AUTOMATIC) 920129473Spjd continue; 921129473Spjd if (strcmp(md.md_name, sc->sc_name) != 0) 922129473Spjd continue; 923129473Spjd if (md.md_id != sc->sc_id) 924129473Spjd continue; 925129473Spjd break; 926129473Spjd } 927129473Spjd if (gp != NULL) { 928129473Spjd G_STRIPE_DEBUG(1, "Adding disk %s to %s.", pp->name, gp->name); 929129473Spjd error = g_stripe_add_disk(sc, pp, md.md_no); 930129473Spjd if (error != 0) { 931129473Spjd G_STRIPE_DEBUG(0, 932129473Spjd "Cannot add disk %s to %s (error=%d).", pp->name, 933129473Spjd gp->name, error); 934129473Spjd return (NULL); 935129473Spjd } 936129473Spjd } else { 937129473Spjd gp = g_stripe_create(mp, &md, G_STRIPE_TYPE_AUTOMATIC); 938129473Spjd if (gp == NULL) { 939132664Spjd G_STRIPE_DEBUG(0, "Cannot create device %s.", 940129473Spjd md.md_name); 941129473Spjd return (NULL); 942129473Spjd } 943129473Spjd sc = gp->softc; 944129473Spjd G_STRIPE_DEBUG(1, "Adding disk %s to %s.", pp->name, gp->name); 945129473Spjd error = g_stripe_add_disk(sc, pp, md.md_no); 946129473Spjd if (error != 0) { 947129473Spjd G_STRIPE_DEBUG(0, 948129473Spjd "Cannot add disk %s to %s (error=%d).", pp->name, 949129473Spjd gp->name, error); 950129473Spjd g_stripe_destroy(sc, 1); 951129473Spjd return (NULL); 952129473Spjd } 953129473Spjd } 954129473Spjd 955129473Spjd return (gp); 956129473Spjd} 957129473Spjd 958129473Spjdstatic void 959129473Spjdg_stripe_ctl_create(struct gctl_req *req, struct g_class *mp) 960129473Spjd{ 961129473Spjd u_int attached, no; 962129473Spjd struct g_stripe_metadata md; 963129473Spjd struct g_provider *pp; 964129473Spjd struct g_stripe_softc *sc; 965129473Spjd struct g_geom *gp; 966129473Spjd struct sbuf *sb; 967129473Spjd intmax_t *stripesize; 968129473Spjd const char *name; 969129473Spjd char param[16]; 970129473Spjd int *nargs; 971129473Spjd 972129473Spjd g_topology_assert(); 973129473Spjd nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs)); 974129473Spjd if (nargs == NULL) { 975129473Spjd gctl_error(req, "No '%s' argument.", "nargs"); 976129473Spjd return; 977129473Spjd } 978129473Spjd if (*nargs <= 2) { 979129473Spjd gctl_error(req, "Too few arguments."); 980129473Spjd return; 981129473Spjd } 982129473Spjd 983129473Spjd strlcpy(md.md_magic, G_STRIPE_MAGIC, sizeof(md.md_magic)); 984129473Spjd md.md_version = G_STRIPE_VERSION; 985129473Spjd name = gctl_get_asciiparam(req, "arg0"); 986129473Spjd if (name == NULL) { 987129473Spjd gctl_error(req, "No 'arg%u' argument.", 0); 988129473Spjd return; 989129473Spjd } 990129473Spjd strlcpy(md.md_name, name, sizeof(md.md_name)); 991129473Spjd md.md_id = arc4random(); 992129473Spjd md.md_no = 0; 993129473Spjd md.md_all = *nargs - 1; 994129473Spjd stripesize = gctl_get_paraml(req, "stripesize", sizeof(*stripesize)); 995129473Spjd if (stripesize == NULL) { 996129473Spjd gctl_error(req, "No '%s' argument.", "stripesize"); 997129473Spjd return; 998129473Spjd } 999129473Spjd md.md_stripesize = *stripesize; 1000133373Spjd bzero(md.md_provider, sizeof(md.md_provider)); 1001129473Spjd 1002129473Spjd /* Check all providers are valid */ 1003129473Spjd for (no = 1; no < *nargs; no++) { 1004129473Spjd snprintf(param, sizeof(param), "arg%u", no); 1005129473Spjd name = gctl_get_asciiparam(req, param); 1006129473Spjd if (name == NULL) { 1007129473Spjd gctl_error(req, "No 'arg%u' argument.", no); 1008129473Spjd return; 1009129473Spjd } 1010129473Spjd if (strncmp(name, "/dev/", strlen("/dev/")) == 0) 1011129473Spjd name += strlen("/dev/"); 1012129473Spjd pp = g_provider_by_name(name); 1013129473Spjd if (pp == NULL) { 1014129473Spjd G_STRIPE_DEBUG(1, "Disk %s is invalid.", name); 1015129473Spjd gctl_error(req, "Disk %s is invalid.", name); 1016129473Spjd return; 1017129473Spjd } 1018129473Spjd } 1019129473Spjd 1020129473Spjd gp = g_stripe_create(mp, &md, G_STRIPE_TYPE_MANUAL); 1021129473Spjd if (gp == NULL) { 1022132664Spjd gctl_error(req, "Can't configure %s.", md.md_name); 1023129473Spjd return; 1024129473Spjd } 1025129473Spjd 1026129473Spjd sc = gp->softc; 1027129473Spjd sb = sbuf_new(NULL, NULL, 0, SBUF_AUTOEXTEND); 1028129473Spjd sbuf_printf(sb, "Can't attach disk(s) to %s:", gp->name); 1029129473Spjd for (attached = 0, no = 1; no < *nargs; no++) { 1030129473Spjd snprintf(param, sizeof(param), "arg%u", no); 1031129473Spjd name = gctl_get_asciiparam(req, param); 1032129473Spjd if (strncmp(name, "/dev/", strlen("/dev/")) == 0) 1033129473Spjd name += strlen("/dev/"); 1034129473Spjd pp = g_provider_by_name(name); 1035129473Spjd KASSERT(pp != NULL, ("Provider %s disappear?!", name)); 1036129473Spjd if (g_stripe_add_disk(sc, pp, no - 1) != 0) { 1037129473Spjd G_STRIPE_DEBUG(1, "Disk %u (%s) not attached to %s.", 1038129473Spjd no, pp->name, gp->name); 1039129473Spjd sbuf_printf(sb, " %s", pp->name); 1040129473Spjd continue; 1041129473Spjd } 1042129473Spjd attached++; 1043129473Spjd } 1044129473Spjd sbuf_finish(sb); 1045129473Spjd if (md.md_all != attached) { 1046129473Spjd g_stripe_destroy(gp->softc, 1); 1047129473Spjd gctl_error(req, "%s", sbuf_data(sb)); 1048129473Spjd } 1049129473Spjd sbuf_delete(sb); 1050129473Spjd} 1051129473Spjd 1052129473Spjdstatic struct g_stripe_softc * 1053129473Spjdg_stripe_find_device(struct g_class *mp, const char *name) 1054129473Spjd{ 1055129473Spjd struct g_stripe_softc *sc; 1056129473Spjd struct g_geom *gp; 1057129473Spjd 1058129473Spjd LIST_FOREACH(gp, &mp->geom, geom) { 1059129473Spjd sc = gp->softc; 1060129473Spjd if (sc == NULL) 1061129473Spjd continue; 1062132664Spjd if (strcmp(sc->sc_name, name) == 0) 1063129473Spjd return (sc); 1064129473Spjd } 1065129473Spjd return (NULL); 1066129473Spjd} 1067129473Spjd 1068129473Spjdstatic void 1069129473Spjdg_stripe_ctl_destroy(struct gctl_req *req, struct g_class *mp) 1070129473Spjd{ 1071129473Spjd struct g_stripe_softc *sc; 1072129473Spjd int *force, *nargs, error; 1073129473Spjd const char *name; 1074129473Spjd char param[16]; 1075129473Spjd u_int i; 1076129473Spjd 1077129473Spjd g_topology_assert(); 1078129473Spjd 1079129473Spjd nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs)); 1080129473Spjd if (nargs == NULL) { 1081129473Spjd gctl_error(req, "No '%s' argument.", "nargs"); 1082129473Spjd return; 1083129473Spjd } 1084129473Spjd if (*nargs <= 0) { 1085129473Spjd gctl_error(req, "Missing device(s)."); 1086129473Spjd return; 1087129473Spjd } 1088129473Spjd force = gctl_get_paraml(req, "force", sizeof(*force)); 1089129473Spjd if (force == NULL) { 1090129473Spjd gctl_error(req, "No '%s' argument.", "force"); 1091129473Spjd return; 1092129473Spjd } 1093129473Spjd 1094129473Spjd for (i = 0; i < (u_int)*nargs; i++) { 1095129473Spjd snprintf(param, sizeof(param), "arg%u", i); 1096129473Spjd name = gctl_get_asciiparam(req, param); 1097129473Spjd if (name == NULL) { 1098129473Spjd gctl_error(req, "No 'arg%u' argument.", i); 1099129473Spjd return; 1100129473Spjd } 1101129473Spjd sc = g_stripe_find_device(mp, name); 1102129473Spjd if (sc == NULL) { 1103129473Spjd gctl_error(req, "No such device: %s.", name); 1104129473Spjd return; 1105129473Spjd } 1106129473Spjd error = g_stripe_destroy(sc, *force); 1107129473Spjd if (error != 0) { 1108129473Spjd gctl_error(req, "Cannot destroy device %s (error=%d).", 1109132664Spjd sc->sc_name, error); 1110129473Spjd return; 1111129473Spjd } 1112129473Spjd } 1113129473Spjd} 1114129473Spjd 1115129473Spjdstatic void 1116129473Spjdg_stripe_config(struct gctl_req *req, struct g_class *mp, const char *verb) 1117129473Spjd{ 1118129473Spjd uint32_t *version; 1119129473Spjd 1120129473Spjd g_topology_assert(); 1121129473Spjd 1122129473Spjd version = gctl_get_paraml(req, "version", sizeof(*version)); 1123129473Spjd if (version == NULL) { 1124129473Spjd gctl_error(req, "No '%s' argument.", "version"); 1125129473Spjd return; 1126129473Spjd } 1127129473Spjd if (*version != G_STRIPE_VERSION) { 1128129473Spjd gctl_error(req, "Userland and kernel parts are out of sync."); 1129129473Spjd return; 1130129473Spjd } 1131129473Spjd 1132129473Spjd if (strcmp(verb, "create") == 0) { 1133129473Spjd g_stripe_ctl_create(req, mp); 1134129473Spjd return; 1135131649Spjd } else if (strcmp(verb, "destroy") == 0 || 1136131649Spjd strcmp(verb, "stop") == 0) { 1137129473Spjd g_stripe_ctl_destroy(req, mp); 1138129473Spjd return; 1139129473Spjd } 1140129473Spjd 1141129473Spjd gctl_error(req, "Unknown verb."); 1142129473Spjd} 1143129473Spjd 1144129473Spjdstatic void 1145129473Spjdg_stripe_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, 1146129473Spjd struct g_consumer *cp, struct g_provider *pp) 1147129473Spjd{ 1148129473Spjd struct g_stripe_softc *sc; 1149129473Spjd 1150129473Spjd sc = gp->softc; 1151132665Spjd if (sc == NULL) 1152129473Spjd return; 1153132665Spjd if (pp != NULL) { 1154132665Spjd /* Nothing here. */ 1155132665Spjd } else if (cp != NULL) { 1156132665Spjd /* Nothing here. */ 1157132665Spjd } else { 1158132665Spjd sbuf_printf(sb, "%s<ID>%u</ID>\n", indent, (u_int)sc->sc_id); 1159132665Spjd sbuf_printf(sb, "%s<Stripesize>%u</Stripesize>\n", indent, 1160132665Spjd (u_int)sc->sc_stripesize); 1161132665Spjd sbuf_printf(sb, "%s<Type>", indent); 1162132665Spjd switch (sc->sc_type) { 1163132665Spjd case G_STRIPE_TYPE_AUTOMATIC: 1164132665Spjd sbuf_printf(sb, "AUTOMATIC"); 1165132665Spjd break; 1166132665Spjd case G_STRIPE_TYPE_MANUAL: 1167132665Spjd sbuf_printf(sb, "MANUAL"); 1168132665Spjd break; 1169132665Spjd default: 1170132665Spjd sbuf_printf(sb, "UNKNOWN"); 1171132665Spjd break; 1172132665Spjd } 1173132665Spjd sbuf_printf(sb, "</Type>\n"); 1174132665Spjd sbuf_printf(sb, "%s<Status>Total=%u, Online=%u</Status>\n", 1175132665Spjd indent, sc->sc_ndisks, g_stripe_nvalid(sc)); 1176132665Spjd sbuf_printf(sb, "%s<State>", indent); 1177132665Spjd if (sc->sc_provider != NULL && sc->sc_provider->error == 0) 1178132665Spjd sbuf_printf(sb, "UP"); 1179132665Spjd else 1180132665Spjd sbuf_printf(sb, "DOWN"); 1181132665Spjd sbuf_printf(sb, "</State>\n"); 1182129473Spjd } 1183129473Spjd} 1184129473Spjd 1185129473SpjdDECLARE_GEOM_CLASS(g_stripe_class, g_stripe); 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