1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2010 Alexander Motin <mav@FreeBSD.org> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 #include <sys/param.h> 31 #include <sys/bio.h> 32 #include <sys/endian.h> 33 #include <sys/kernel.h> 34 #include <sys/kobj.h> 35 #include <sys/lock.h> 36 #include <sys/malloc.h> 37 #include <sys/mutex.h> 38 #include <sys/systm.h> 39 #include <geom/geom.h> 40 #include <geom/geom_dbg.h> 41 #include "geom/raid/g_raid.h" 42 #include "g_raid_tr_if.h" 43 44 static MALLOC_DEFINE(M_TR_RAID0, "tr_raid0_data", "GEOM_RAID RAID0 data"); 45 46 struct g_raid_tr_raid0_object { 47 struct g_raid_tr_object trso_base; 48 int trso_starting; 49 int trso_stopped; 50 }; 51 52 static g_raid_tr_taste_t g_raid_tr_taste_raid0; 53 static g_raid_tr_event_t g_raid_tr_event_raid0; 54 static g_raid_tr_start_t g_raid_tr_start_raid0; 55 static g_raid_tr_stop_t g_raid_tr_stop_raid0; 56 static g_raid_tr_iostart_t g_raid_tr_iostart_raid0; 57 static g_raid_tr_iodone_t g_raid_tr_iodone_raid0; 58 static g_raid_tr_kerneldump_t g_raid_tr_kerneldump_raid0; 59 static g_raid_tr_free_t g_raid_tr_free_raid0; 60 61 static kobj_method_t g_raid_tr_raid0_methods[] = { 62 KOBJMETHOD(g_raid_tr_taste, g_raid_tr_taste_raid0), 63 KOBJMETHOD(g_raid_tr_event, g_raid_tr_event_raid0), 64 KOBJMETHOD(g_raid_tr_start, g_raid_tr_start_raid0), 65 KOBJMETHOD(g_raid_tr_stop, g_raid_tr_stop_raid0), 66 KOBJMETHOD(g_raid_tr_iostart, g_raid_tr_iostart_raid0), 67 KOBJMETHOD(g_raid_tr_iodone, g_raid_tr_iodone_raid0), 68 KOBJMETHOD(g_raid_tr_kerneldump, g_raid_tr_kerneldump_raid0), 69 KOBJMETHOD(g_raid_tr_free, g_raid_tr_free_raid0), 70 { 0, 0 } 71 }; 72 73 static struct g_raid_tr_class g_raid_tr_raid0_class = { 74 "RAID0", 75 g_raid_tr_raid0_methods, 76 sizeof(struct g_raid_tr_raid0_object), 77 .trc_enable = 1, 78 .trc_priority = 100, 79 .trc_accept_unmapped = 1 80 }; 81 82 static int 83 g_raid_tr_taste_raid0(struct g_raid_tr_object *tr, struct g_raid_volume *volume) 84 { 85 struct g_raid_tr_raid0_object *trs; 86 87 trs = (struct g_raid_tr_raid0_object *)tr; 88 if (tr->tro_volume->v_raid_level != G_RAID_VOLUME_RL_RAID0 || 89 tr->tro_volume->v_raid_level_qualifier != G_RAID_VOLUME_RLQ_NONE) 90 return (G_RAID_TR_TASTE_FAIL); 91 trs->trso_starting = 1; 92 return (G_RAID_TR_TASTE_SUCCEED); 93 } 94 95 static int 96 g_raid_tr_update_state_raid0(struct g_raid_volume *vol) 97 { 98 struct g_raid_tr_raid0_object *trs; 99 struct g_raid_softc *sc; 100 u_int s; 101 int n, f; 102 103 sc = vol->v_softc; 104 trs = (struct g_raid_tr_raid0_object *)vol->v_tr; 105 if (trs->trso_stopped) 106 s = G_RAID_VOLUME_S_STOPPED; 107 else if (trs->trso_starting) 108 s = G_RAID_VOLUME_S_STARTING; 109 else { 110 n = g_raid_nsubdisks(vol, G_RAID_SUBDISK_S_ACTIVE); 111 f = g_raid_nsubdisks(vol, G_RAID_SUBDISK_S_FAILED); 112 if (n + f == vol->v_disks_count) { 113 if (f == 0) 114 s = G_RAID_VOLUME_S_OPTIMAL; 115 else 116 s = G_RAID_VOLUME_S_SUBOPTIMAL; 117 } else 118 s = G_RAID_VOLUME_S_BROKEN; 119 } 120 if (s != vol->v_state) { 121 g_raid_event_send(vol, G_RAID_VOLUME_S_ALIVE(s) ? 122 G_RAID_VOLUME_E_UP : G_RAID_VOLUME_E_DOWN, 123 G_RAID_EVENT_VOLUME); 124 g_raid_change_volume_state(vol, s); 125 if (!trs->trso_starting && !trs->trso_stopped) 126 g_raid_write_metadata(sc, vol, NULL, NULL); 127 } 128 return (0); 129 } 130 131 static int 132 g_raid_tr_event_raid0(struct g_raid_tr_object *tr, 133 struct g_raid_subdisk *sd, u_int event) 134 { 135 struct g_raid_tr_raid0_object *trs; 136 struct g_raid_softc *sc; 137 struct g_raid_volume *vol; 138 int state; 139 140 trs = (struct g_raid_tr_raid0_object *)tr; 141 vol = tr->tro_volume; 142 sc = vol->v_softc; 143 144 state = sd->sd_state; 145 if (state != G_RAID_SUBDISK_S_NONE && 146 state != G_RAID_SUBDISK_S_FAILED && 147 state != G_RAID_SUBDISK_S_ACTIVE) { 148 G_RAID_DEBUG1(1, sc, 149 "Promote subdisk %s:%d from %s to ACTIVE.", 150 vol->v_name, sd->sd_pos, 151 g_raid_subdisk_state2str(sd->sd_state)); 152 g_raid_change_subdisk_state(sd, G_RAID_SUBDISK_S_ACTIVE); 153 } 154 if (state != sd->sd_state && 155 !trs->trso_starting && !trs->trso_stopped) 156 g_raid_write_metadata(sc, vol, sd, NULL); 157 g_raid_tr_update_state_raid0(vol); 158 return (0); 159 } 160 161 static int 162 g_raid_tr_start_raid0(struct g_raid_tr_object *tr) 163 { 164 struct g_raid_tr_raid0_object *trs; 165 struct g_raid_volume *vol; 166 167 trs = (struct g_raid_tr_raid0_object *)tr; 168 vol = tr->tro_volume; 169 trs->trso_starting = 0; 170 g_raid_tr_update_state_raid0(vol); 171 return (0); 172 } 173 174 static int 175 g_raid_tr_stop_raid0(struct g_raid_tr_object *tr) 176 { 177 struct g_raid_tr_raid0_object *trs; 178 struct g_raid_volume *vol; 179 180 trs = (struct g_raid_tr_raid0_object *)tr; 181 vol = tr->tro_volume; 182 trs->trso_starting = 0; 183 trs->trso_stopped = 1; 184 g_raid_tr_update_state_raid0(vol); 185 return (0); 186 } 187 188 static void 189 g_raid_tr_iostart_raid0(struct g_raid_tr_object *tr, struct bio *bp) 190 { 191 struct g_raid_volume *vol; 192 struct g_raid_subdisk *sd; 193 struct bio_queue_head queue; 194 struct bio *cbp; 195 char *addr; 196 off_t offset, start, length, nstripe, remain; 197 u_int no, strip_size; 198 199 vol = tr->tro_volume; 200 if (vol->v_state != G_RAID_VOLUME_S_OPTIMAL && 201 vol->v_state != G_RAID_VOLUME_S_SUBOPTIMAL) { 202 g_raid_iodone(bp, EIO); 203 return; 204 } 205 if (bp->bio_cmd == BIO_FLUSH || bp->bio_cmd == BIO_SPEEDUP) { 206 g_raid_tr_flush_common(tr, bp); 207 return; 208 } 209 if ((bp->bio_flags & BIO_UNMAPPED) != 0) 210 addr = NULL; 211 else 212 addr = bp->bio_data; 213 strip_size = vol->v_strip_size; 214 215 /* Stripe number. */ 216 nstripe = bp->bio_offset / strip_size; 217 /* Start position in stripe. */ 218 start = bp->bio_offset % strip_size; 219 /* Disk number. */ 220 no = nstripe % vol->v_disks_count; 221 /* Stripe start position in disk. */ 222 offset = (nstripe / vol->v_disks_count) * strip_size; 223 /* Length of data to operate. */ 224 remain = bp->bio_length; 225 226 bioq_init(&queue); 227 do { 228 length = MIN(strip_size - start, remain); 229 cbp = g_clone_bio(bp); 230 if (cbp == NULL) 231 goto failure; 232 cbp->bio_offset = offset + start; 233 cbp->bio_length = length; 234 if ((bp->bio_flags & BIO_UNMAPPED) != 0 && 235 bp->bio_cmd != BIO_DELETE) { 236 cbp->bio_ma_offset += (uintptr_t)addr; 237 cbp->bio_ma += cbp->bio_ma_offset / PAGE_SIZE; 238 cbp->bio_ma_offset %= PAGE_SIZE; 239 cbp->bio_ma_n = round_page(cbp->bio_ma_offset + 240 cbp->bio_length) / PAGE_SIZE; 241 } else 242 cbp->bio_data = addr; 243 cbp->bio_caller1 = &vol->v_subdisks[no]; 244 bioq_insert_tail(&queue, cbp); 245 if (++no >= vol->v_disks_count) { 246 no = 0; 247 offset += strip_size; 248 } 249 remain -= length; 250 if (bp->bio_cmd != BIO_DELETE) 251 addr += length; 252 start = 0; 253 } while (remain > 0); 254 while ((cbp = bioq_takefirst(&queue)) != NULL) { 255 sd = cbp->bio_caller1; 256 cbp->bio_caller1 = NULL; 257 g_raid_subdisk_iostart(sd, cbp); 258 } 259 return; 260 failure: 261 while ((cbp = bioq_takefirst(&queue)) != NULL) 262 g_destroy_bio(cbp); 263 if (bp->bio_error == 0) 264 bp->bio_error = ENOMEM; 265 g_raid_iodone(bp, bp->bio_error); 266 } 267 268 static int 269 g_raid_tr_kerneldump_raid0(struct g_raid_tr_object *tr, 270 void *virtual, off_t boffset, size_t blength) 271 { 272 struct g_raid_volume *vol; 273 char *addr; 274 off_t offset, start, length, nstripe, remain; 275 u_int no, strip_size; 276 int error; 277 278 vol = tr->tro_volume; 279 if (vol->v_state != G_RAID_VOLUME_S_OPTIMAL) 280 return (ENXIO); 281 addr = virtual; 282 strip_size = vol->v_strip_size; 283 284 /* Stripe number. */ 285 nstripe = boffset / strip_size; 286 /* Start position in stripe. */ 287 start = boffset % strip_size; 288 /* Disk number. */ 289 no = nstripe % vol->v_disks_count; 290 /* Stripe tart position in disk. */ 291 offset = (nstripe / vol->v_disks_count) * strip_size; 292 /* Length of data to operate. */ 293 remain = blength; 294 295 do { 296 length = MIN(strip_size - start, remain); 297 error = g_raid_subdisk_kerneldump(&vol->v_subdisks[no], addr, 298 offset + start, length); 299 if (error != 0) 300 return (error); 301 if (++no >= vol->v_disks_count) { 302 no = 0; 303 offset += strip_size; 304 } 305 remain -= length; 306 addr += length; 307 start = 0; 308 } while (remain > 0); 309 return (0); 310 } 311 312 static void 313 g_raid_tr_iodone_raid0(struct g_raid_tr_object *tr, 314 struct g_raid_subdisk *sd,struct bio *bp) 315 { 316 struct bio *pbp; 317 318 pbp = bp->bio_parent; 319 if (pbp->bio_error == 0) 320 pbp->bio_error = bp->bio_error; 321 g_destroy_bio(bp); 322 pbp->bio_inbed++; 323 if (pbp->bio_children == pbp->bio_inbed) { 324 pbp->bio_completed = pbp->bio_length; 325 g_raid_iodone(pbp, pbp->bio_error); 326 } 327 } 328 329 static int 330 g_raid_tr_free_raid0(struct g_raid_tr_object *tr) 331 { 332 333 return (0); 334 } 335 336 G_RAID_TR_DECLARE(raid0, "RAID0"); 337