g_stripe.c revision 134528
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 134528 2004-08-30 18:50:06Z 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; 72134528SpjdTUNABLE_INT("kern.geom.stripe.debug", &g_stripe_debug); 73131878SpjdSYSCTL_UINT(_kern_geom_stripe, OID_AUTO, debug, CTLFLAG_RW, &g_stripe_debug, 0, 74131878Spjd "Debug level"); 75131878Spjdstatic int g_stripe_fast = 1; 76131878SpjdTUNABLE_INT("kern.geom.stripe.fast", &g_stripe_fast); 77131878Spjdstatic int 78131878Spjdg_sysctl_stripe_fast(SYSCTL_HANDLER_ARGS) 79131878Spjd{ 80131878Spjd int error, fast; 81129473Spjd 82131878Spjd fast = g_stripe_fast; 83131878Spjd error = sysctl_handle_int(oidp, &fast, sizeof(fast), req); 84131878Spjd if (error == 0 && req->newptr != NULL) 85131878Spjd g_stripe_fast = fast; 86131878Spjd return (error); 87131878Spjd} 88131878SpjdSYSCTL_PROC(_kern_geom_stripe, OID_AUTO, fast, CTLTYPE_INT | CTLFLAG_RW, 89132095Spjd NULL, 0, g_sysctl_stripe_fast, "I", "Fast, but memory-consuming, mode"); 90133498Spjdstatic u_int g_stripe_maxmem = MAX_IO_SIZE * 50; 91131878SpjdTUNABLE_INT("kern.geom.stripe.maxmem", &g_stripe_maxmem); 92131878SpjdSYSCTL_UINT(_kern_geom_stripe, OID_AUTO, maxmem, CTLFLAG_RD, &g_stripe_maxmem, 93132095Spjd 0, "Maximum memory that can be allocated in \"fast\" mode (in bytes)"); 94133205Spjdstatic u_int g_stripe_fast_failed = 0; 95133205SpjdSYSCTL_UINT(_kern_geom_stripe, OID_AUTO, fast_failed, CTLFLAG_RD, 96133205Spjd &g_stripe_fast_failed, 0, "How many times \"fast\" mode failed"); 97131878Spjd 98129473Spjd/* 99129473Spjd * Greatest Common Divisor. 100129473Spjd */ 101129473Spjdstatic u_int 102129473Spjdgcd(u_int a, u_int b) 103129473Spjd{ 104129473Spjd u_int c; 105129473Spjd 106129473Spjd while (b != 0) { 107129473Spjd c = a; 108129473Spjd a = b; 109129473Spjd b = (c % b); 110129473Spjd } 111129473Spjd return (a); 112129473Spjd} 113129473Spjd 114129473Spjd/* 115129473Spjd * Least Common Multiple. 116129473Spjd */ 117129473Spjdstatic u_int 118129473Spjdlcm(u_int a, u_int b) 119129473Spjd{ 120129473Spjd 121129473Spjd return ((a * b) / gcd(a, b)); 122129473Spjd} 123129473Spjd 124131878Spjdstatic void 125131878Spjdg_stripe_init(struct g_class *mp __unused) 126131878Spjd{ 127131878Spjd 128131878Spjd g_stripe_zone = uma_zcreate("g_stripe_zone", MAX_IO_SIZE, NULL, NULL, 129131878Spjd NULL, NULL, 0, 0); 130131878Spjd g_stripe_maxmem -= g_stripe_maxmem % MAX_IO_SIZE; 131131878Spjd uma_zone_set_max(g_stripe_zone, g_stripe_maxmem / MAX_IO_SIZE); 132131878Spjd} 133131878Spjd 134131878Spjdstatic void 135131878Spjdg_stripe_fini(struct g_class *mp __unused) 136131878Spjd{ 137131878Spjd 138131878Spjd uma_zdestroy(g_stripe_zone); 139131878Spjd} 140131878Spjd 141129473Spjd/* 142129473Spjd * Return the number of valid disks. 143129473Spjd */ 144129473Spjdstatic u_int 145129473Spjdg_stripe_nvalid(struct g_stripe_softc *sc) 146129473Spjd{ 147129473Spjd u_int i, no; 148129473Spjd 149129473Spjd no = 0; 150129473Spjd for (i = 0; i < sc->sc_ndisks; i++) { 151129473Spjd if (sc->sc_disks[i] != NULL) 152129473Spjd no++; 153129473Spjd } 154129473Spjd 155129473Spjd return (no); 156129473Spjd} 157129473Spjd 158129473Spjdstatic void 159129473Spjdg_stripe_remove_disk(struct g_consumer *cp) 160129473Spjd{ 161129473Spjd struct g_stripe_softc *sc; 162129473Spjd u_int no; 163129473Spjd 164129473Spjd KASSERT(cp != NULL, ("Non-valid disk in %s.", __func__)); 165129473Spjd sc = (struct g_stripe_softc *)cp->private; 166129473Spjd KASSERT(sc != NULL, ("NULL sc in %s.", __func__)); 167129473Spjd no = cp->index; 168129473Spjd 169129473Spjd G_STRIPE_DEBUG(0, "Disk %s removed from %s.", cp->provider->name, 170132664Spjd sc->sc_name); 171129473Spjd 172129473Spjd sc->sc_disks[no] = NULL; 173129473Spjd if (sc->sc_provider != NULL) { 174129473Spjd g_orphan_provider(sc->sc_provider, ENXIO); 175129473Spjd sc->sc_provider = NULL; 176132664Spjd G_STRIPE_DEBUG(0, "Device %s removed.", sc->sc_name); 177129473Spjd } 178129473Spjd 179129473Spjd if (cp->acr > 0 || cp->acw > 0 || cp->ace > 0) 180129473Spjd g_access(cp, -cp->acr, -cp->acw, -cp->ace); 181129473Spjd g_detach(cp); 182129473Spjd g_destroy_consumer(cp); 183129473Spjd} 184129473Spjd 185129473Spjdstatic void 186129473Spjdg_stripe_orphan(struct g_consumer *cp) 187129473Spjd{ 188129473Spjd struct g_stripe_softc *sc; 189129473Spjd struct g_geom *gp; 190129473Spjd 191129473Spjd g_topology_assert(); 192129473Spjd gp = cp->geom; 193129473Spjd sc = gp->softc; 194129473Spjd if (sc == NULL) 195129473Spjd return; 196129473Spjd 197129473Spjd g_stripe_remove_disk(cp); 198129473Spjd /* If there are no valid disks anymore, remove device. */ 199129473Spjd if (g_stripe_nvalid(sc) == 0) 200129473Spjd g_stripe_destroy(sc, 1); 201129473Spjd} 202129473Spjd 203129473Spjdstatic int 204129473Spjdg_stripe_access(struct g_provider *pp, int dr, int dw, int de) 205129473Spjd{ 206129473Spjd struct g_consumer *cp1, *cp2; 207129473Spjd struct g_stripe_softc *sc; 208129473Spjd struct g_geom *gp; 209129473Spjd int error; 210129473Spjd 211129473Spjd gp = pp->geom; 212129473Spjd sc = gp->softc; 213129473Spjd 214129473Spjd if (sc == NULL) { 215129473Spjd /* 216129473Spjd * It looks like geom is being withered. 217129473Spjd * In that case we allow only negative requests. 218129473Spjd */ 219129473Spjd KASSERT(dr <= 0 && dw <= 0 && de <= 0, 220129473Spjd ("Positive access request (device=%s).", pp->name)); 221129473Spjd if ((pp->acr + dr) == 0 && (pp->acw + dw) == 0 && 222129473Spjd (pp->ace + de) == 0) { 223129473Spjd G_STRIPE_DEBUG(0, "Device %s definitely destroyed.", 224129473Spjd gp->name); 225129473Spjd } 226129473Spjd return (0); 227129473Spjd } 228129473Spjd 229129473Spjd /* On first open, grab an extra "exclusive" bit */ 230129473Spjd if (pp->acr == 0 && pp->acw == 0 && pp->ace == 0) 231129473Spjd de++; 232129473Spjd /* ... and let go of it on last close */ 233129473Spjd if ((pp->acr + dr) == 0 && (pp->acw + dw) == 0 && (pp->ace + de) == 0) 234129473Spjd de--; 235129473Spjd 236129473Spjd error = ENXIO; 237129473Spjd LIST_FOREACH(cp1, &gp->consumer, consumer) { 238129473Spjd error = g_access(cp1, dr, dw, de); 239129473Spjd if (error == 0) 240129473Spjd continue; 241129473Spjd /* 242129473Spjd * If we fail here, backout all previous changes. 243129473Spjd */ 244129473Spjd LIST_FOREACH(cp2, &gp->consumer, consumer) { 245129473Spjd if (cp1 == cp2) 246129473Spjd return (error); 247129473Spjd g_access(cp2, -dr, -dw, -de); 248129473Spjd } 249129473Spjd /* NOTREACHED */ 250129473Spjd } 251129473Spjd 252129473Spjd return (error); 253129473Spjd} 254129473Spjd 255129473Spjdstatic void 256131878Spjdg_stripe_copy(struct g_stripe_softc *sc, char *src, char *dst, off_t offset, 257131878Spjd off_t length, int mode) 258129473Spjd{ 259131878Spjd u_int stripesize; 260131878Spjd size_t len; 261131878Spjd 262131878Spjd stripesize = sc->sc_stripesize; 263131878Spjd len = (size_t)(stripesize - (offset & (stripesize - 1))); 264131878Spjd do { 265131878Spjd bcopy(src, dst, len); 266131878Spjd if (mode) { 267131878Spjd dst += len + stripesize * (sc->sc_ndisks - 1); 268131878Spjd src += len; 269131878Spjd } else { 270131878Spjd dst += len; 271131878Spjd src += len + stripesize * (sc->sc_ndisks - 1); 272131878Spjd } 273131878Spjd length -= len; 274131878Spjd KASSERT(length >= 0, 275131878Spjd ("Length < 0 (stripesize=%zu, offset=%jd, length=%jd).", 276131878Spjd (size_t)stripesize, (intmax_t)offset, (intmax_t)length)); 277131878Spjd if (length > stripesize) 278131878Spjd len = stripesize; 279131878Spjd else 280131878Spjd len = length; 281131878Spjd } while (length > 0); 282131878Spjd} 283131878Spjd 284131878Spjdstatic void 285131878Spjdg_stripe_done(struct bio *bp) 286131878Spjd{ 287129473Spjd struct g_stripe_softc *sc; 288131878Spjd struct bio *pbp; 289131878Spjd 290131878Spjd pbp = bp->bio_parent; 291131878Spjd sc = pbp->bio_to->geom->softc; 292131878Spjd if (pbp->bio_error == 0) 293131878Spjd pbp->bio_error = bp->bio_error; 294131878Spjd pbp->bio_completed += bp->bio_completed; 295133204Spjd if (bp->bio_cmd == BIO_READ && bp->bio_caller1 != NULL) { 296133204Spjd g_stripe_copy(sc, bp->bio_data, bp->bio_caller1, bp->bio_offset, 297131878Spjd bp->bio_length, 1); 298133204Spjd bp->bio_data = bp->bio_caller1; 299133204Spjd bp->bio_caller1 = NULL; 300131878Spjd } 301131878Spjd g_destroy_bio(bp); 302131878Spjd pbp->bio_inbed++; 303131878Spjd if (pbp->bio_children == pbp->bio_inbed) { 304133204Spjd if (pbp->bio_driver1 != NULL) 305133204Spjd uma_zfree(g_stripe_zone, pbp->bio_driver1); 306131878Spjd g_io_deliver(pbp, pbp->bio_error); 307131878Spjd } 308131878Spjd} 309131878Spjd 310131878Spjdstatic int 311131878Spjdg_stripe_start_fast(struct bio *bp, u_int no, off_t offset, off_t length) 312131878Spjd{ 313131878Spjd TAILQ_HEAD(, bio) queue = TAILQ_HEAD_INITIALIZER(queue); 314131878Spjd u_int nparts = 0, stripesize; 315131878Spjd struct g_stripe_softc *sc; 316131878Spjd char *addr, *data = NULL; 317129473Spjd struct bio *cbp; 318131878Spjd int error; 319131878Spjd 320131878Spjd sc = bp->bio_to->geom->softc; 321131878Spjd 322131878Spjd addr = bp->bio_data; 323131878Spjd stripesize = sc->sc_stripesize; 324131878Spjd 325131878Spjd cbp = g_clone_bio(bp); 326131878Spjd if (cbp == NULL) { 327131878Spjd error = ENOMEM; 328131878Spjd goto failure; 329131878Spjd } 330131878Spjd TAILQ_INSERT_TAIL(&queue, cbp, bio_queue); 331131878Spjd nparts++; 332131878Spjd /* 333131878Spjd * Fill in the component buf structure. 334131878Spjd */ 335131878Spjd cbp->bio_done = g_stripe_done; 336131878Spjd cbp->bio_offset = offset; 337131878Spjd cbp->bio_data = addr; 338133204Spjd cbp->bio_caller1 = NULL; 339131878Spjd cbp->bio_length = length; 340133204Spjd cbp->bio_caller2 = sc->sc_disks[no]; 341131878Spjd 342131878Spjd /* offset -= offset % stripesize; */ 343131878Spjd offset -= offset & (stripesize - 1); 344131878Spjd addr += length; 345131878Spjd length = bp->bio_length - length; 346131878Spjd for (no++; length > 0; no++, length -= stripesize, addr += stripesize) { 347131878Spjd if (no > sc->sc_ndisks - 1) { 348131878Spjd no = 0; 349131878Spjd offset += stripesize; 350131878Spjd } 351131878Spjd if (nparts >= sc->sc_ndisks) { 352131878Spjd cbp = TAILQ_NEXT(cbp, bio_queue); 353131878Spjd if (cbp == NULL) 354131878Spjd cbp = TAILQ_FIRST(&queue); 355131878Spjd nparts++; 356131878Spjd /* 357131878Spjd * Update bio structure. 358131878Spjd */ 359131878Spjd /* 360131878Spjd * MIN() is in case when 361131878Spjd * (bp->bio_length % sc->sc_stripesize) != 0. 362131878Spjd */ 363131878Spjd cbp->bio_length += MIN(stripesize, length); 364133204Spjd if (cbp->bio_caller1 == NULL) { 365133204Spjd cbp->bio_caller1 = cbp->bio_data; 366131878Spjd cbp->bio_data = NULL; 367131878Spjd if (data == NULL) { 368131878Spjd data = uma_zalloc(g_stripe_zone, 369131878Spjd M_NOWAIT); 370131878Spjd if (data == NULL) { 371131878Spjd error = ENOMEM; 372131878Spjd goto failure; 373131878Spjd } 374131878Spjd } 375131878Spjd } 376131878Spjd } else { 377131878Spjd cbp = g_clone_bio(bp); 378131878Spjd if (cbp == NULL) { 379131878Spjd error = ENOMEM; 380131878Spjd goto failure; 381131878Spjd } 382131878Spjd TAILQ_INSERT_TAIL(&queue, cbp, bio_queue); 383131878Spjd nparts++; 384131878Spjd /* 385131878Spjd * Fill in the component buf structure. 386131878Spjd */ 387131878Spjd cbp->bio_done = g_stripe_done; 388131878Spjd cbp->bio_offset = offset; 389131878Spjd cbp->bio_data = addr; 390133204Spjd cbp->bio_caller1 = NULL; 391131878Spjd /* 392131878Spjd * MIN() is in case when 393131878Spjd * (bp->bio_length % sc->sc_stripesize) != 0. 394131878Spjd */ 395131878Spjd cbp->bio_length = MIN(stripesize, length); 396133204Spjd cbp->bio_caller2 = sc->sc_disks[no]; 397131878Spjd } 398131878Spjd } 399131878Spjd if (data != NULL) 400133444Spjd bp->bio_driver1 = data; 401131878Spjd /* 402131878Spjd * Fire off all allocated requests! 403131878Spjd */ 404131878Spjd while ((cbp = TAILQ_FIRST(&queue)) != NULL) { 405131878Spjd struct g_consumer *cp; 406131878Spjd 407131878Spjd TAILQ_REMOVE(&queue, cbp, bio_queue); 408133204Spjd cp = cbp->bio_caller2; 409133204Spjd cbp->bio_caller2 = NULL; 410131878Spjd cbp->bio_to = cp->provider; 411133204Spjd if (cbp->bio_caller1 != NULL) { 412131878Spjd cbp->bio_data = data; 413131878Spjd if (bp->bio_cmd == BIO_WRITE) { 414133204Spjd g_stripe_copy(sc, cbp->bio_caller1, data, 415131878Spjd cbp->bio_offset, cbp->bio_length, 0); 416131878Spjd } 417131878Spjd data += cbp->bio_length; 418131878Spjd } 419131878Spjd G_STRIPE_LOGREQ(cbp, "Sending request."); 420131878Spjd g_io_request(cbp, cp); 421131878Spjd } 422131878Spjd return (0); 423131878Spjdfailure: 424131878Spjd if (data != NULL) 425131878Spjd uma_zfree(g_stripe_zone, data); 426131878Spjd while ((cbp = TAILQ_FIRST(&queue)) != NULL) { 427131878Spjd TAILQ_REMOVE(&queue, cbp, bio_queue); 428133204Spjd if (cbp->bio_caller1 != NULL) { 429133204Spjd cbp->bio_data = cbp->bio_caller1; 430133204Spjd cbp->bio_caller1 = NULL; 431131878Spjd } 432133201Spjd bp->bio_children--; 433131878Spjd g_destroy_bio(cbp); 434131878Spjd } 435131878Spjd return (error); 436131878Spjd} 437131878Spjd 438131878Spjdstatic int 439131878Spjdg_stripe_start_economic(struct bio *bp, u_int no, off_t offset, off_t length) 440131878Spjd{ 441131878Spjd TAILQ_HEAD(, bio) queue = TAILQ_HEAD_INITIALIZER(queue); 442131878Spjd struct g_stripe_softc *sc; 443129473Spjd uint32_t stripesize; 444131878Spjd struct bio *cbp; 445129473Spjd char *addr; 446131878Spjd int error; 447129473Spjd 448131878Spjd sc = bp->bio_to->geom->softc; 449131878Spjd 450131878Spjd addr = bp->bio_data; 451131878Spjd stripesize = sc->sc_stripesize; 452131878Spjd 453131878Spjd cbp = g_clone_bio(bp); 454131878Spjd if (cbp == NULL) { 455131878Spjd error = ENOMEM; 456131878Spjd goto failure; 457131878Spjd } 458131878Spjd TAILQ_INSERT_TAIL(&queue, cbp, bio_queue); 459129473Spjd /* 460131878Spjd * Fill in the component buf structure. 461131878Spjd */ 462131878Spjd cbp->bio_done = g_std_done; 463131878Spjd cbp->bio_offset = offset; 464131878Spjd cbp->bio_data = addr; 465131878Spjd cbp->bio_length = length; 466133204Spjd cbp->bio_caller2 = sc->sc_disks[no]; 467131878Spjd 468131878Spjd /* offset -= offset % stripesize; */ 469131878Spjd offset -= offset & (stripesize - 1); 470131878Spjd addr += length; 471131878Spjd length = bp->bio_length - length; 472131878Spjd for (no++; length > 0; no++, length -= stripesize, addr += stripesize) { 473131878Spjd if (no > sc->sc_ndisks - 1) { 474131878Spjd no = 0; 475131878Spjd offset += stripesize; 476131878Spjd } 477131878Spjd cbp = g_clone_bio(bp); 478131878Spjd if (cbp == NULL) { 479131878Spjd error = ENOMEM; 480131878Spjd goto failure; 481131878Spjd } 482131878Spjd TAILQ_INSERT_TAIL(&queue, cbp, bio_queue); 483131878Spjd 484131878Spjd /* 485131878Spjd * Fill in the component buf structure. 486131878Spjd */ 487131878Spjd cbp->bio_done = g_std_done; 488131878Spjd cbp->bio_offset = offset; 489131878Spjd cbp->bio_data = addr; 490131878Spjd /* 491131878Spjd * MIN() is in case when 492131878Spjd * (bp->bio_length % sc->sc_stripesize) != 0. 493131878Spjd */ 494131878Spjd cbp->bio_length = MIN(stripesize, length); 495131878Spjd 496133204Spjd cbp->bio_caller2 = sc->sc_disks[no]; 497131878Spjd } 498131878Spjd /* 499131878Spjd * Fire off all allocated requests! 500131878Spjd */ 501131878Spjd while ((cbp = TAILQ_FIRST(&queue)) != NULL) { 502131878Spjd struct g_consumer *cp; 503131878Spjd 504131878Spjd TAILQ_REMOVE(&queue, cbp, bio_queue); 505133204Spjd cp = cbp->bio_caller2; 506133204Spjd cbp->bio_caller2 = NULL; 507131878Spjd cbp->bio_to = cp->provider; 508131878Spjd G_STRIPE_LOGREQ(cbp, "Sending request."); 509131878Spjd g_io_request(cbp, cp); 510131878Spjd } 511131878Spjd return (0); 512131878Spjdfailure: 513131878Spjd while ((cbp = TAILQ_FIRST(&queue)) != NULL) { 514131878Spjd TAILQ_REMOVE(&queue, cbp, bio_queue); 515133201Spjd bp->bio_children--; 516131878Spjd g_destroy_bio(cbp); 517131878Spjd } 518131878Spjd return (error); 519131878Spjd} 520131878Spjd 521131878Spjdstatic void 522131878Spjdg_stripe_start(struct bio *bp) 523131878Spjd{ 524131878Spjd off_t offset, start, length, nstripe; 525131878Spjd struct g_stripe_softc *sc; 526131878Spjd u_int no, stripesize; 527131878Spjd int error, fast = 0; 528131878Spjd 529131878Spjd sc = bp->bio_to->geom->softc; 530131878Spjd /* 531129473Spjd * If sc == NULL, provider's error should be set and g_stripe_start() 532129473Spjd * should not be called at all. 533129473Spjd */ 534129473Spjd KASSERT(sc != NULL, 535129473Spjd ("Provider's error should be set (error=%d)(device=%s).", 536129473Spjd bp->bio_to->error, bp->bio_to->name)); 537129473Spjd 538129473Spjd G_STRIPE_LOGREQ(bp, "Request received."); 539129473Spjd 540129473Spjd switch (bp->bio_cmd) { 541129473Spjd case BIO_READ: 542129473Spjd case BIO_WRITE: 543129473Spjd case BIO_DELETE: 544129473Spjd /* 545129473Spjd * Only those requests are supported. 546129473Spjd */ 547129473Spjd break; 548129473Spjd case BIO_GETATTR: 549129473Spjd /* To which provider it should be delivered? */ 550129473Spjd default: 551129473Spjd g_io_deliver(bp, EOPNOTSUPP); 552129473Spjd return; 553129473Spjd } 554129473Spjd 555129473Spjd stripesize = sc->sc_stripesize; 556129473Spjd 557129473Spjd /* 558131878Spjd * Calculations are quite messy, but fast I hope. 559129473Spjd */ 560129473Spjd 561129473Spjd /* Stripe number. */ 562129473Spjd /* nstripe = bp->bio_offset / stripesize; */ 563129473Spjd nstripe = bp->bio_offset >> (off_t)sc->sc_stripebits; 564129473Spjd /* Disk number. */ 565129473Spjd no = nstripe % sc->sc_ndisks; 566129473Spjd /* Start position in stripe. */ 567129473Spjd /* start = bp->bio_offset % stripesize; */ 568129473Spjd start = bp->bio_offset & (stripesize - 1); 569129473Spjd /* Start position in disk. */ 570131878Spjd /* offset = (nstripe / sc->sc_ndisks) * stripesize + start; */ 571131878Spjd offset = ((nstripe / sc->sc_ndisks) << sc->sc_stripebits) + start; 572129473Spjd /* Length of data to operate. */ 573129473Spjd length = MIN(bp->bio_length, stripesize - start); 574129473Spjd 575131878Spjd /* 576131878Spjd * Do use "fast" mode when: 577131878Spjd * 1. "Fast" mode is ON. 578131878Spjd * and 579131878Spjd * 2. Request size is less than or equal to MAX_IO_SIZE (128kB), 580131878Spjd * which should always be true. 581131878Spjd * and 582131878Spjd * 3. Request size is bigger than stripesize * ndisks. If it isn't, 583131878Spjd * there will be no need to send more than one I/O request to 584131878Spjd * a provider, so there is nothing to optmize. 585131878Spjd */ 586131878Spjd if (g_stripe_fast && bp->bio_length <= MAX_IO_SIZE && 587131878Spjd bp->bio_length >= stripesize * sc->sc_ndisks) { 588131878Spjd fast = 1; 589129473Spjd } 590131878Spjd error = 0; 591133205Spjd if (fast) { 592131878Spjd error = g_stripe_start_fast(bp, no, offset, length); 593133205Spjd if (error != 0) 594133205Spjd g_stripe_fast_failed++; 595133205Spjd } 596129473Spjd /* 597131878Spjd * Do use "economic" when: 598131878Spjd * 1. "Economic" mode is ON. 599131878Spjd * or 600131878Spjd * 2. "Fast" mode failed. It can only failed if there is no memory. 601129473Spjd */ 602131878Spjd if (!fast || error != 0) 603131878Spjd error = g_stripe_start_economic(bp, no, offset, length); 604131878Spjd if (error != 0) { 605131878Spjd if (bp->bio_error == 0) 606131878Spjd bp->bio_error = error; 607131878Spjd g_io_deliver(bp, bp->bio_error); 608129473Spjd } 609129473Spjd} 610129473Spjd 611129473Spjdstatic void 612129473Spjdg_stripe_check_and_run(struct g_stripe_softc *sc) 613129473Spjd{ 614129473Spjd off_t mediasize, ms; 615129473Spjd u_int no, sectorsize = 0; 616129473Spjd 617129473Spjd if (g_stripe_nvalid(sc) != sc->sc_ndisks) 618129473Spjd return; 619129473Spjd 620132664Spjd sc->sc_provider = g_new_providerf(sc->sc_geom, "stripe/%s", 621132664Spjd sc->sc_name); 622129473Spjd /* 623129473Spjd * Find the smallest disk. 624129473Spjd */ 625129473Spjd mediasize = sc->sc_disks[0]->provider->mediasize; 626129473Spjd if (sc->sc_type == G_STRIPE_TYPE_AUTOMATIC) 627129473Spjd mediasize -= sc->sc_disks[0]->provider->sectorsize; 628129473Spjd mediasize -= mediasize % sc->sc_stripesize; 629129473Spjd sectorsize = sc->sc_disks[0]->provider->sectorsize; 630129473Spjd for (no = 1; no < sc->sc_ndisks; no++) { 631129473Spjd ms = sc->sc_disks[no]->provider->mediasize; 632129473Spjd if (sc->sc_type == G_STRIPE_TYPE_AUTOMATIC) 633129473Spjd ms -= sc->sc_disks[no]->provider->sectorsize; 634129473Spjd ms -= ms % sc->sc_stripesize; 635129473Spjd if (ms < mediasize) 636129473Spjd mediasize = ms; 637129473Spjd sectorsize = lcm(sectorsize, 638129473Spjd sc->sc_disks[no]->provider->sectorsize); 639129473Spjd } 640129473Spjd sc->sc_provider->sectorsize = sectorsize; 641129473Spjd sc->sc_provider->mediasize = mediasize * sc->sc_ndisks; 642129473Spjd g_error_provider(sc->sc_provider, 0); 643129473Spjd 644132664Spjd G_STRIPE_DEBUG(0, "Device %s activated.", sc->sc_name); 645129473Spjd} 646129473Spjd 647129473Spjdstatic int 648129473Spjdg_stripe_read_metadata(struct g_consumer *cp, struct g_stripe_metadata *md) 649129473Spjd{ 650129473Spjd struct g_provider *pp; 651129473Spjd u_char *buf; 652129473Spjd int error; 653129473Spjd 654129473Spjd g_topology_assert(); 655129473Spjd 656129473Spjd error = g_access(cp, 1, 0, 0); 657129473Spjd if (error != 0) 658129473Spjd return (error); 659129473Spjd pp = cp->provider; 660129473Spjd g_topology_unlock(); 661129473Spjd buf = g_read_data(cp, pp->mediasize - pp->sectorsize, pp->sectorsize, 662129473Spjd &error); 663129473Spjd g_topology_lock(); 664129473Spjd g_access(cp, -1, 0, 0); 665129473Spjd if (buf == NULL) 666129473Spjd return (error); 667129473Spjd 668129473Spjd /* Decode metadata. */ 669129473Spjd stripe_metadata_decode(buf, md); 670129473Spjd g_free(buf); 671129473Spjd 672129473Spjd return (0); 673129473Spjd} 674129473Spjd 675129473Spjd/* 676129473Spjd * Add disk to given device. 677129473Spjd */ 678129473Spjdstatic int 679129473Spjdg_stripe_add_disk(struct g_stripe_softc *sc, struct g_provider *pp, u_int no) 680129473Spjd{ 681129473Spjd struct g_consumer *cp, *fcp; 682129473Spjd struct g_geom *gp; 683129473Spjd int error; 684129473Spjd 685129473Spjd /* Metadata corrupted? */ 686129473Spjd if (no >= sc->sc_ndisks) 687129473Spjd return (EINVAL); 688129473Spjd 689129473Spjd /* Check if disk is not already attached. */ 690129473Spjd if (sc->sc_disks[no] != NULL) 691129473Spjd return (EEXIST); 692129473Spjd 693129473Spjd gp = sc->sc_geom; 694129473Spjd fcp = LIST_FIRST(&gp->consumer); 695129473Spjd 696129473Spjd cp = g_new_consumer(gp); 697129473Spjd error = g_attach(cp, pp); 698129473Spjd if (error != 0) { 699129473Spjd g_destroy_consumer(cp); 700129473Spjd return (error); 701129473Spjd } 702129473Spjd 703129473Spjd if (fcp != NULL && (fcp->acr > 0 || fcp->acw > 0 || fcp->ace > 0)) { 704129473Spjd error = g_access(cp, fcp->acr, fcp->acw, fcp->ace); 705129473Spjd if (error != 0) { 706129473Spjd g_detach(cp); 707129473Spjd g_destroy_consumer(cp); 708129473Spjd return (error); 709129473Spjd } 710129473Spjd } 711129473Spjd if (sc->sc_type == G_STRIPE_TYPE_AUTOMATIC) { 712129473Spjd struct g_stripe_metadata md; 713129473Spjd 714129473Spjd /* Reread metadata. */ 715129473Spjd error = g_stripe_read_metadata(cp, &md); 716129473Spjd if (error != 0) 717129473Spjd goto fail; 718129473Spjd 719129473Spjd if (strcmp(md.md_magic, G_STRIPE_MAGIC) != 0 || 720129473Spjd strcmp(md.md_name, sc->sc_name) != 0 || 721129473Spjd md.md_id != sc->sc_id) { 722129473Spjd G_STRIPE_DEBUG(0, "Metadata on %s changed.", pp->name); 723129473Spjd goto fail; 724129473Spjd } 725129473Spjd } 726129473Spjd 727129473Spjd cp->private = sc; 728129473Spjd cp->index = no; 729129473Spjd sc->sc_disks[no] = cp; 730129473Spjd 731132664Spjd G_STRIPE_DEBUG(0, "Disk %s attached to %s.", pp->name, sc->sc_name); 732129473Spjd 733129473Spjd g_stripe_check_and_run(sc); 734129473Spjd 735129473Spjd return (0); 736129473Spjdfail: 737129473Spjd if (fcp != NULL && (fcp->acr > 0 || fcp->acw > 0 || fcp->ace > 0)) 738129473Spjd g_access(cp, -fcp->acr, -fcp->acw, -fcp->ace); 739129473Spjd g_detach(cp); 740129473Spjd g_destroy_consumer(cp); 741129473Spjd return (error); 742129473Spjd} 743129473Spjd 744129473Spjdstatic struct g_geom * 745129473Spjdg_stripe_create(struct g_class *mp, const struct g_stripe_metadata *md, 746129473Spjd u_int type) 747129473Spjd{ 748129473Spjd struct g_stripe_softc *sc; 749129473Spjd struct g_geom *gp; 750129473Spjd u_int no; 751129473Spjd 752132664Spjd G_STRIPE_DEBUG(1, "Creating device %s (id=%u).", md->md_name, 753129473Spjd md->md_id); 754129473Spjd 755129473Spjd /* Two disks is minimum. */ 756132664Spjd if (md->md_all < 2) { 757132664Spjd G_STRIPE_DEBUG(0, "Too few disks defined for %s.", md->md_name); 758129473Spjd return (NULL); 759129473Spjd } 760129473Spjd#if 0 761129473Spjd /* Stripe size have to be grater than or equal to sector size. */ 762129473Spjd if (md->md_stripesize < sectorsize) { 763132664Spjd G_STRIPE_DEBUG(0, "Invalid stripe size for %s.", md->md_name); 764129473Spjd return (NULL); 765129473Spjd } 766129473Spjd#endif 767129473Spjd /* Stripe size have to be power of 2. */ 768129473Spjd if (!powerof2(md->md_stripesize)) { 769132664Spjd G_STRIPE_DEBUG(0, "Invalid stripe size for %s.", md->md_name); 770129473Spjd return (NULL); 771129473Spjd } 772129473Spjd 773129473Spjd /* Check for duplicate unit */ 774129473Spjd LIST_FOREACH(gp, &mp->geom, geom) { 775129473Spjd sc = gp->softc; 776129473Spjd if (sc != NULL && strcmp(sc->sc_name, md->md_name) == 0) { 777129473Spjd G_STRIPE_DEBUG(0, "Device %s already configured.", 778132664Spjd sc->sc_name); 779129473Spjd return (NULL); 780129473Spjd } 781129473Spjd } 782132664Spjd gp = g_new_geomf(mp, "%s", md->md_name); 783129473Spjd gp->softc = NULL; /* for a moment */ 784129473Spjd 785132662Spjd sc = malloc(sizeof(*sc), M_STRIPE, M_WAITOK | M_ZERO); 786129473Spjd gp->start = g_stripe_start; 787129473Spjd gp->spoiled = g_stripe_orphan; 788129473Spjd gp->orphan = g_stripe_orphan; 789129473Spjd gp->access = g_stripe_access; 790129473Spjd gp->dumpconf = g_stripe_dumpconf; 791129473Spjd 792129473Spjd sc->sc_id = md->md_id; 793129473Spjd sc->sc_stripesize = md->md_stripesize; 794129473Spjd sc->sc_stripebits = BITCOUNT(sc->sc_stripesize - 1); 795129473Spjd sc->sc_ndisks = md->md_all; 796129473Spjd sc->sc_disks = malloc(sizeof(struct g_consumer *) * sc->sc_ndisks, 797129473Spjd M_STRIPE, M_WAITOK | M_ZERO); 798129473Spjd for (no = 0; no < sc->sc_ndisks; no++) 799129473Spjd sc->sc_disks[no] = NULL; 800129473Spjd sc->sc_type = type; 801129473Spjd 802129473Spjd gp->softc = sc; 803129473Spjd sc->sc_geom = gp; 804129473Spjd sc->sc_provider = NULL; 805129473Spjd 806132664Spjd G_STRIPE_DEBUG(0, "Device %s created (id=%u).", sc->sc_name, sc->sc_id); 807129473Spjd 808129473Spjd return (gp); 809129473Spjd} 810129473Spjd 811129473Spjdstatic int 812129473Spjdg_stripe_destroy(struct g_stripe_softc *sc, boolean_t force) 813129473Spjd{ 814129473Spjd struct g_provider *pp; 815129473Spjd struct g_geom *gp; 816129473Spjd u_int no; 817129473Spjd 818129473Spjd g_topology_assert(); 819129473Spjd 820129473Spjd if (sc == NULL) 821129473Spjd return (ENXIO); 822129473Spjd 823129473Spjd pp = sc->sc_provider; 824129473Spjd if (pp != NULL && (pp->acr != 0 || pp->acw != 0 || pp->ace != 0)) { 825129473Spjd if (force) { 826129473Spjd G_STRIPE_DEBUG(0, "Device %s is still open, so it " 827129473Spjd "can't be definitely removed.", pp->name); 828129473Spjd } else { 829129473Spjd G_STRIPE_DEBUG(1, 830129473Spjd "Device %s is still open (r%dw%de%d).", pp->name, 831129473Spjd pp->acr, pp->acw, pp->ace); 832129473Spjd return (EBUSY); 833129473Spjd } 834129473Spjd } 835129473Spjd 836129473Spjd for (no = 0; no < sc->sc_ndisks; no++) { 837129473Spjd if (sc->sc_disks[no] != NULL) 838129473Spjd g_stripe_remove_disk(sc->sc_disks[no]); 839129473Spjd } 840129473Spjd 841129473Spjd gp = sc->sc_geom; 842129473Spjd gp->softc = NULL; 843129473Spjd KASSERT(sc->sc_provider == NULL, ("Provider still exists? (device=%s)", 844129473Spjd gp->name)); 845129473Spjd free(sc->sc_disks, M_STRIPE); 846129473Spjd free(sc, M_STRIPE); 847129473Spjd 848129473Spjd pp = LIST_FIRST(&gp->provider); 849129473Spjd if (pp == NULL || (pp->acr == 0 && pp->acw == 0 && pp->ace == 0)) 850129473Spjd G_STRIPE_DEBUG(0, "Device %s destroyed.", gp->name); 851129473Spjd 852129473Spjd g_wither_geom(gp, ENXIO); 853129473Spjd 854129473Spjd return (0); 855129473Spjd} 856129473Spjd 857129473Spjdstatic int 858129473Spjdg_stripe_destroy_geom(struct gctl_req *req __unused, 859129473Spjd struct g_class *mp __unused, struct g_geom *gp) 860129473Spjd{ 861129473Spjd struct g_stripe_softc *sc; 862129473Spjd 863129473Spjd sc = gp->softc; 864129473Spjd return (g_stripe_destroy(sc, 0)); 865129473Spjd} 866129473Spjd 867129473Spjdstatic struct g_geom * 868129473Spjdg_stripe_taste(struct g_class *mp, struct g_provider *pp, int flags __unused) 869129473Spjd{ 870129473Spjd struct g_stripe_metadata md; 871129473Spjd struct g_stripe_softc *sc; 872129473Spjd struct g_consumer *cp; 873129473Spjd struct g_geom *gp; 874129473Spjd int error; 875129473Spjd 876129473Spjd g_trace(G_T_TOPOLOGY, "%s(%s, %s)", __func__, mp->name, pp->name); 877129473Spjd g_topology_assert(); 878129473Spjd 879129473Spjd G_STRIPE_DEBUG(3, "Tasting %s.", pp->name); 880134344Spjd /* Skip providers with 0 sectorsize. */ 881134344Spjd if (pp->sectorsize == 0) 882134344Spjd return (NULL); 883129473Spjd 884129473Spjd gp = g_new_geomf(mp, "stripe:taste"); 885129473Spjd gp->start = g_stripe_start; 886129473Spjd gp->access = g_stripe_access; 887129473Spjd gp->orphan = g_stripe_orphan; 888129473Spjd cp = g_new_consumer(gp); 889129473Spjd g_attach(cp, pp); 890129473Spjd error = g_stripe_read_metadata(cp, &md); 891133371Spjd g_detach(cp); 892133371Spjd g_destroy_consumer(cp); 893133371Spjd g_destroy_geom(gp); 894129473Spjd if (error != 0) 895129473Spjd return (NULL); 896129473Spjd gp = NULL; 897129473Spjd 898129473Spjd if (strcmp(md.md_magic, G_STRIPE_MAGIC) != 0) 899129473Spjd return (NULL); 900129473Spjd if (md.md_version > G_STRIPE_VERSION) { 901129473Spjd printf("geom_stripe.ko module is too old to handle %s.\n", 902129473Spjd pp->name); 903129473Spjd return (NULL); 904129473Spjd } 905133373Spjd /* 906133373Spjd * Backward compatibility: 907133373Spjd * There was no md_provider field in earlier versions of metadata. 908133373Spjd */ 909133373Spjd if (md.md_version < 2) 910133373Spjd bzero(md.md_provider, sizeof(md.md_provider)); 911129473Spjd 912133373Spjd if (md.md_provider[0] != '\0' && strcmp(md.md_provider, pp->name) != 0) 913133373Spjd return (NULL); 914133373Spjd 915129473Spjd /* 916129473Spjd * Let's check if device already exists. 917129473Spjd */ 918129473Spjd sc = NULL; 919129473Spjd LIST_FOREACH(gp, &mp->geom, geom) { 920129473Spjd sc = gp->softc; 921129473Spjd if (sc == NULL) 922129473Spjd continue; 923129473Spjd if (sc->sc_type != G_STRIPE_TYPE_AUTOMATIC) 924129473Spjd continue; 925129473Spjd if (strcmp(md.md_name, sc->sc_name) != 0) 926129473Spjd continue; 927129473Spjd if (md.md_id != sc->sc_id) 928129473Spjd continue; 929129473Spjd break; 930129473Spjd } 931129473Spjd if (gp != NULL) { 932129473Spjd G_STRIPE_DEBUG(1, "Adding disk %s to %s.", pp->name, gp->name); 933129473Spjd error = g_stripe_add_disk(sc, pp, md.md_no); 934129473Spjd if (error != 0) { 935129473Spjd G_STRIPE_DEBUG(0, 936129473Spjd "Cannot add disk %s to %s (error=%d).", pp->name, 937129473Spjd gp->name, error); 938129473Spjd return (NULL); 939129473Spjd } 940129473Spjd } else { 941129473Spjd gp = g_stripe_create(mp, &md, G_STRIPE_TYPE_AUTOMATIC); 942129473Spjd if (gp == NULL) { 943132664Spjd G_STRIPE_DEBUG(0, "Cannot create device %s.", 944129473Spjd md.md_name); 945129473Spjd return (NULL); 946129473Spjd } 947129473Spjd sc = gp->softc; 948129473Spjd G_STRIPE_DEBUG(1, "Adding disk %s to %s.", pp->name, gp->name); 949129473Spjd error = g_stripe_add_disk(sc, pp, md.md_no); 950129473Spjd if (error != 0) { 951129473Spjd G_STRIPE_DEBUG(0, 952129473Spjd "Cannot add disk %s to %s (error=%d).", pp->name, 953129473Spjd gp->name, error); 954129473Spjd g_stripe_destroy(sc, 1); 955129473Spjd return (NULL); 956129473Spjd } 957129473Spjd } 958129473Spjd 959129473Spjd return (gp); 960129473Spjd} 961129473Spjd 962129473Spjdstatic void 963129473Spjdg_stripe_ctl_create(struct gctl_req *req, struct g_class *mp) 964129473Spjd{ 965129473Spjd u_int attached, no; 966129473Spjd struct g_stripe_metadata md; 967129473Spjd struct g_provider *pp; 968129473Spjd struct g_stripe_softc *sc; 969129473Spjd struct g_geom *gp; 970129473Spjd struct sbuf *sb; 971129473Spjd intmax_t *stripesize; 972129473Spjd const char *name; 973129473Spjd char param[16]; 974129473Spjd int *nargs; 975129473Spjd 976129473Spjd g_topology_assert(); 977129473Spjd nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs)); 978129473Spjd if (nargs == NULL) { 979129473Spjd gctl_error(req, "No '%s' argument.", "nargs"); 980129473Spjd return; 981129473Spjd } 982129473Spjd if (*nargs <= 2) { 983129473Spjd gctl_error(req, "Too few arguments."); 984129473Spjd return; 985129473Spjd } 986129473Spjd 987129473Spjd strlcpy(md.md_magic, G_STRIPE_MAGIC, sizeof(md.md_magic)); 988129473Spjd md.md_version = G_STRIPE_VERSION; 989129473Spjd name = gctl_get_asciiparam(req, "arg0"); 990129473Spjd if (name == NULL) { 991129473Spjd gctl_error(req, "No 'arg%u' argument.", 0); 992129473Spjd return; 993129473Spjd } 994129473Spjd strlcpy(md.md_name, name, sizeof(md.md_name)); 995129473Spjd md.md_id = arc4random(); 996129473Spjd md.md_no = 0; 997129473Spjd md.md_all = *nargs - 1; 998129473Spjd stripesize = gctl_get_paraml(req, "stripesize", sizeof(*stripesize)); 999129473Spjd if (stripesize == NULL) { 1000129473Spjd gctl_error(req, "No '%s' argument.", "stripesize"); 1001129473Spjd return; 1002129473Spjd } 1003129473Spjd md.md_stripesize = *stripesize; 1004133373Spjd bzero(md.md_provider, sizeof(md.md_provider)); 1005129473Spjd 1006129473Spjd /* Check all providers are valid */ 1007129473Spjd for (no = 1; no < *nargs; no++) { 1008129473Spjd snprintf(param, sizeof(param), "arg%u", no); 1009129473Spjd name = gctl_get_asciiparam(req, param); 1010129473Spjd if (name == NULL) { 1011129473Spjd gctl_error(req, "No 'arg%u' argument.", no); 1012129473Spjd return; 1013129473Spjd } 1014129473Spjd if (strncmp(name, "/dev/", strlen("/dev/")) == 0) 1015129473Spjd name += strlen("/dev/"); 1016129473Spjd pp = g_provider_by_name(name); 1017129473Spjd if (pp == NULL) { 1018129473Spjd G_STRIPE_DEBUG(1, "Disk %s is invalid.", name); 1019129473Spjd gctl_error(req, "Disk %s is invalid.", name); 1020129473Spjd return; 1021129473Spjd } 1022129473Spjd } 1023129473Spjd 1024129473Spjd gp = g_stripe_create(mp, &md, G_STRIPE_TYPE_MANUAL); 1025129473Spjd if (gp == NULL) { 1026132664Spjd gctl_error(req, "Can't configure %s.", md.md_name); 1027129473Spjd return; 1028129473Spjd } 1029129473Spjd 1030129473Spjd sc = gp->softc; 1031129473Spjd sb = sbuf_new(NULL, NULL, 0, SBUF_AUTOEXTEND); 1032129473Spjd sbuf_printf(sb, "Can't attach disk(s) to %s:", gp->name); 1033129473Spjd for (attached = 0, no = 1; no < *nargs; no++) { 1034129473Spjd snprintf(param, sizeof(param), "arg%u", no); 1035129473Spjd name = gctl_get_asciiparam(req, param); 1036129473Spjd if (strncmp(name, "/dev/", strlen("/dev/")) == 0) 1037129473Spjd name += strlen("/dev/"); 1038129473Spjd pp = g_provider_by_name(name); 1039129473Spjd KASSERT(pp != NULL, ("Provider %s disappear?!", name)); 1040129473Spjd if (g_stripe_add_disk(sc, pp, no - 1) != 0) { 1041129473Spjd G_STRIPE_DEBUG(1, "Disk %u (%s) not attached to %s.", 1042129473Spjd no, pp->name, gp->name); 1043129473Spjd sbuf_printf(sb, " %s", pp->name); 1044129473Spjd continue; 1045129473Spjd } 1046129473Spjd attached++; 1047129473Spjd } 1048129473Spjd sbuf_finish(sb); 1049129473Spjd if (md.md_all != attached) { 1050129473Spjd g_stripe_destroy(gp->softc, 1); 1051129473Spjd gctl_error(req, "%s", sbuf_data(sb)); 1052129473Spjd } 1053129473Spjd sbuf_delete(sb); 1054129473Spjd} 1055129473Spjd 1056129473Spjdstatic struct g_stripe_softc * 1057129473Spjdg_stripe_find_device(struct g_class *mp, const char *name) 1058129473Spjd{ 1059129473Spjd struct g_stripe_softc *sc; 1060129473Spjd struct g_geom *gp; 1061129473Spjd 1062129473Spjd LIST_FOREACH(gp, &mp->geom, geom) { 1063129473Spjd sc = gp->softc; 1064129473Spjd if (sc == NULL) 1065129473Spjd continue; 1066132664Spjd if (strcmp(sc->sc_name, name) == 0) 1067129473Spjd return (sc); 1068129473Spjd } 1069129473Spjd return (NULL); 1070129473Spjd} 1071129473Spjd 1072129473Spjdstatic void 1073129473Spjdg_stripe_ctl_destroy(struct gctl_req *req, struct g_class *mp) 1074129473Spjd{ 1075129473Spjd struct g_stripe_softc *sc; 1076129473Spjd int *force, *nargs, error; 1077129473Spjd const char *name; 1078129473Spjd char param[16]; 1079129473Spjd u_int i; 1080129473Spjd 1081129473Spjd g_topology_assert(); 1082129473Spjd 1083129473Spjd nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs)); 1084129473Spjd if (nargs == NULL) { 1085129473Spjd gctl_error(req, "No '%s' argument.", "nargs"); 1086129473Spjd return; 1087129473Spjd } 1088129473Spjd if (*nargs <= 0) { 1089129473Spjd gctl_error(req, "Missing device(s)."); 1090129473Spjd return; 1091129473Spjd } 1092129473Spjd force = gctl_get_paraml(req, "force", sizeof(*force)); 1093129473Spjd if (force == NULL) { 1094129473Spjd gctl_error(req, "No '%s' argument.", "force"); 1095129473Spjd return; 1096129473Spjd } 1097129473Spjd 1098129473Spjd for (i = 0; i < (u_int)*nargs; i++) { 1099129473Spjd snprintf(param, sizeof(param), "arg%u", i); 1100129473Spjd name = gctl_get_asciiparam(req, param); 1101129473Spjd if (name == NULL) { 1102129473Spjd gctl_error(req, "No 'arg%u' argument.", i); 1103129473Spjd return; 1104129473Spjd } 1105129473Spjd sc = g_stripe_find_device(mp, name); 1106129473Spjd if (sc == NULL) { 1107129473Spjd gctl_error(req, "No such device: %s.", name); 1108129473Spjd return; 1109129473Spjd } 1110129473Spjd error = g_stripe_destroy(sc, *force); 1111129473Spjd if (error != 0) { 1112129473Spjd gctl_error(req, "Cannot destroy device %s (error=%d).", 1113132664Spjd sc->sc_name, error); 1114129473Spjd return; 1115129473Spjd } 1116129473Spjd } 1117129473Spjd} 1118129473Spjd 1119129473Spjdstatic void 1120129473Spjdg_stripe_config(struct gctl_req *req, struct g_class *mp, const char *verb) 1121129473Spjd{ 1122129473Spjd uint32_t *version; 1123129473Spjd 1124129473Spjd g_topology_assert(); 1125129473Spjd 1126129473Spjd version = gctl_get_paraml(req, "version", sizeof(*version)); 1127129473Spjd if (version == NULL) { 1128129473Spjd gctl_error(req, "No '%s' argument.", "version"); 1129129473Spjd return; 1130129473Spjd } 1131129473Spjd if (*version != G_STRIPE_VERSION) { 1132129473Spjd gctl_error(req, "Userland and kernel parts are out of sync."); 1133129473Spjd return; 1134129473Spjd } 1135129473Spjd 1136129473Spjd if (strcmp(verb, "create") == 0) { 1137129473Spjd g_stripe_ctl_create(req, mp); 1138129473Spjd return; 1139131649Spjd } else if (strcmp(verb, "destroy") == 0 || 1140131649Spjd strcmp(verb, "stop") == 0) { 1141129473Spjd g_stripe_ctl_destroy(req, mp); 1142129473Spjd return; 1143129473Spjd } 1144129473Spjd 1145129473Spjd gctl_error(req, "Unknown verb."); 1146129473Spjd} 1147129473Spjd 1148129473Spjdstatic void 1149129473Spjdg_stripe_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, 1150129473Spjd struct g_consumer *cp, struct g_provider *pp) 1151129473Spjd{ 1152129473Spjd struct g_stripe_softc *sc; 1153129473Spjd 1154129473Spjd sc = gp->softc; 1155132665Spjd if (sc == NULL) 1156129473Spjd return; 1157132665Spjd if (pp != NULL) { 1158132665Spjd /* Nothing here. */ 1159132665Spjd } else if (cp != NULL) { 1160134292Spjd sbuf_printf(sb, "%s<Number>%u</Number>\n", indent, 1161134292Spjd (u_int)cp->index); 1162132665Spjd } else { 1163132665Spjd sbuf_printf(sb, "%s<ID>%u</ID>\n", indent, (u_int)sc->sc_id); 1164132665Spjd sbuf_printf(sb, "%s<Stripesize>%u</Stripesize>\n", indent, 1165132665Spjd (u_int)sc->sc_stripesize); 1166132665Spjd sbuf_printf(sb, "%s<Type>", indent); 1167132665Spjd switch (sc->sc_type) { 1168132665Spjd case G_STRIPE_TYPE_AUTOMATIC: 1169132665Spjd sbuf_printf(sb, "AUTOMATIC"); 1170132665Spjd break; 1171132665Spjd case G_STRIPE_TYPE_MANUAL: 1172132665Spjd sbuf_printf(sb, "MANUAL"); 1173132665Spjd break; 1174132665Spjd default: 1175132665Spjd sbuf_printf(sb, "UNKNOWN"); 1176132665Spjd break; 1177132665Spjd } 1178132665Spjd sbuf_printf(sb, "</Type>\n"); 1179132665Spjd sbuf_printf(sb, "%s<Status>Total=%u, Online=%u</Status>\n", 1180132665Spjd indent, sc->sc_ndisks, g_stripe_nvalid(sc)); 1181132665Spjd sbuf_printf(sb, "%s<State>", indent); 1182132665Spjd if (sc->sc_provider != NULL && sc->sc_provider->error == 0) 1183132665Spjd sbuf_printf(sb, "UP"); 1184132665Spjd else 1185132665Spjd sbuf_printf(sb, "DOWN"); 1186132665Spjd sbuf_printf(sb, "</State>\n"); 1187129473Spjd } 1188129473Spjd} 1189129473Spjd 1190129473SpjdDECLARE_GEOM_CLASS(g_stripe_class, g_stripe); 1191