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_CONCAT, "tr_concat_data", "GEOM_RAID CONCAT data"); 45 46 struct g_raid_tr_concat_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_concat; 53 static g_raid_tr_event_t g_raid_tr_event_concat; 54 static g_raid_tr_start_t g_raid_tr_start_concat; 55 static g_raid_tr_stop_t g_raid_tr_stop_concat; 56 static g_raid_tr_iostart_t g_raid_tr_iostart_concat; 57 static g_raid_tr_iodone_t g_raid_tr_iodone_concat; 58 static g_raid_tr_kerneldump_t g_raid_tr_kerneldump_concat; 59 static g_raid_tr_free_t g_raid_tr_free_concat; 60 61 static kobj_method_t g_raid_tr_concat_methods[] = { 62 KOBJMETHOD(g_raid_tr_taste, g_raid_tr_taste_concat), 63 KOBJMETHOD(g_raid_tr_event, g_raid_tr_event_concat), 64 KOBJMETHOD(g_raid_tr_start, g_raid_tr_start_concat), 65 KOBJMETHOD(g_raid_tr_stop, g_raid_tr_stop_concat), 66 KOBJMETHOD(g_raid_tr_iostart, g_raid_tr_iostart_concat), 67 KOBJMETHOD(g_raid_tr_iodone, g_raid_tr_iodone_concat), 68 KOBJMETHOD(g_raid_tr_kerneldump, g_raid_tr_kerneldump_concat), 69 KOBJMETHOD(g_raid_tr_free, g_raid_tr_free_concat), 70 { 0, 0 } 71 }; 72 73 static struct g_raid_tr_class g_raid_tr_concat_class = { 74 "CONCAT", 75 g_raid_tr_concat_methods, 76 sizeof(struct g_raid_tr_concat_object), 77 .trc_enable = 1, 78 .trc_priority = 50, 79 .trc_accept_unmapped = 1 80 }; 81 82 static int 83 g_raid_tr_taste_concat(struct g_raid_tr_object *tr, struct g_raid_volume *volume) 84 { 85 struct g_raid_tr_concat_object *trs; 86 87 trs = (struct g_raid_tr_concat_object *)tr; 88 if (tr->tro_volume->v_raid_level != G_RAID_VOLUME_RL_SINGLE && 89 tr->tro_volume->v_raid_level != G_RAID_VOLUME_RL_CONCAT && 90 !(tr->tro_volume->v_disks_count == 1 && 91 tr->tro_volume->v_raid_level != G_RAID_VOLUME_RL_UNKNOWN)) 92 return (G_RAID_TR_TASTE_FAIL); 93 trs->trso_starting = 1; 94 return (G_RAID_TR_TASTE_SUCCEED); 95 } 96 97 static int 98 g_raid_tr_update_state_concat(struct g_raid_volume *vol) 99 { 100 struct g_raid_tr_concat_object *trs; 101 struct g_raid_softc *sc; 102 off_t size; 103 u_int s; 104 int i, n, f; 105 106 sc = vol->v_softc; 107 trs = (struct g_raid_tr_concat_object *)vol->v_tr; 108 if (trs->trso_stopped) 109 s = G_RAID_VOLUME_S_STOPPED; 110 else if (trs->trso_starting) 111 s = G_RAID_VOLUME_S_STARTING; 112 else { 113 n = g_raid_nsubdisks(vol, G_RAID_SUBDISK_S_ACTIVE); 114 f = g_raid_nsubdisks(vol, G_RAID_SUBDISK_S_FAILED); 115 if (n + f == vol->v_disks_count) { 116 if (f == 0) 117 s = G_RAID_VOLUME_S_OPTIMAL; 118 else 119 s = G_RAID_VOLUME_S_SUBOPTIMAL; 120 } else 121 s = G_RAID_VOLUME_S_BROKEN; 122 } 123 if (s != vol->v_state) { 124 /* 125 * Some metadata modules may not know CONCAT volume 126 * mediasize until all disks connected. Recalculate. 127 */ 128 if (vol->v_raid_level == G_RAID_VOLUME_RL_CONCAT && 129 G_RAID_VOLUME_S_ALIVE(s) && 130 !G_RAID_VOLUME_S_ALIVE(vol->v_state)) { 131 size = 0; 132 for (i = 0; i < vol->v_disks_count; i++) { 133 if (vol->v_subdisks[i].sd_state != 134 G_RAID_SUBDISK_S_NONE) 135 size += vol->v_subdisks[i].sd_size; 136 } 137 vol->v_mediasize = size; 138 } 139 140 g_raid_event_send(vol, G_RAID_VOLUME_S_ALIVE(s) ? 141 G_RAID_VOLUME_E_UP : G_RAID_VOLUME_E_DOWN, 142 G_RAID_EVENT_VOLUME); 143 g_raid_change_volume_state(vol, s); 144 if (!trs->trso_starting && !trs->trso_stopped) 145 g_raid_write_metadata(sc, vol, NULL, NULL); 146 } 147 return (0); 148 } 149 150 static int 151 g_raid_tr_event_concat(struct g_raid_tr_object *tr, 152 struct g_raid_subdisk *sd, u_int event) 153 { 154 struct g_raid_tr_concat_object *trs; 155 struct g_raid_softc *sc; 156 struct g_raid_volume *vol; 157 int state; 158 159 trs = (struct g_raid_tr_concat_object *)tr; 160 vol = tr->tro_volume; 161 sc = vol->v_softc; 162 163 state = sd->sd_state; 164 if (state != G_RAID_SUBDISK_S_NONE && 165 state != G_RAID_SUBDISK_S_FAILED && 166 state != G_RAID_SUBDISK_S_ACTIVE) { 167 G_RAID_DEBUG1(1, sc, 168 "Promote subdisk %s:%d from %s to ACTIVE.", 169 vol->v_name, sd->sd_pos, 170 g_raid_subdisk_state2str(sd->sd_state)); 171 g_raid_change_subdisk_state(sd, G_RAID_SUBDISK_S_ACTIVE); 172 } 173 if (state != sd->sd_state && 174 !trs->trso_starting && !trs->trso_stopped) 175 g_raid_write_metadata(sc, vol, sd, NULL); 176 g_raid_tr_update_state_concat(vol); 177 return (0); 178 } 179 180 static int 181 g_raid_tr_start_concat(struct g_raid_tr_object *tr) 182 { 183 struct g_raid_tr_concat_object *trs; 184 struct g_raid_volume *vol; 185 186 trs = (struct g_raid_tr_concat_object *)tr; 187 vol = tr->tro_volume; 188 trs->trso_starting = 0; 189 g_raid_tr_update_state_concat(vol); 190 return (0); 191 } 192 193 static int 194 g_raid_tr_stop_concat(struct g_raid_tr_object *tr) 195 { 196 struct g_raid_tr_concat_object *trs; 197 struct g_raid_volume *vol; 198 199 trs = (struct g_raid_tr_concat_object *)tr; 200 vol = tr->tro_volume; 201 trs->trso_starting = 0; 202 trs->trso_stopped = 1; 203 g_raid_tr_update_state_concat(vol); 204 return (0); 205 } 206 207 static void 208 g_raid_tr_iostart_concat(struct g_raid_tr_object *tr, struct bio *bp) 209 { 210 struct g_raid_volume *vol; 211 struct g_raid_subdisk *sd; 212 struct bio_queue_head queue; 213 struct bio *cbp; 214 char *addr; 215 off_t offset, length, remain; 216 u_int no; 217 218 vol = tr->tro_volume; 219 if (vol->v_state != G_RAID_VOLUME_S_OPTIMAL && 220 vol->v_state != G_RAID_VOLUME_S_SUBOPTIMAL) { 221 g_raid_iodone(bp, EIO); 222 return; 223 } 224 if (bp->bio_cmd == BIO_FLUSH || bp->bio_cmd == BIO_SPEEDUP) { 225 g_raid_tr_flush_common(tr, bp); 226 return; 227 } 228 229 offset = bp->bio_offset; 230 remain = bp->bio_length; 231 if ((bp->bio_flags & BIO_UNMAPPED) != 0) 232 addr = NULL; 233 else 234 addr = bp->bio_data; 235 no = 0; 236 while (no < vol->v_disks_count && 237 offset >= vol->v_subdisks[no].sd_size) { 238 offset -= vol->v_subdisks[no].sd_size; 239 no++; 240 } 241 if (no >= vol->v_disks_count) { 242 g_raid_iodone(bp, EIO); 243 return; 244 } 245 bioq_init(&queue); 246 do { 247 sd = &vol->v_subdisks[no]; 248 length = MIN(sd->sd_size - offset, remain); 249 cbp = g_clone_bio(bp); 250 if (cbp == NULL) 251 goto failure; 252 cbp->bio_offset = offset; 253 cbp->bio_length = length; 254 if ((bp->bio_flags & BIO_UNMAPPED) != 0 && 255 bp->bio_cmd != BIO_DELETE) { 256 cbp->bio_ma_offset += (uintptr_t)addr; 257 cbp->bio_ma += cbp->bio_ma_offset / PAGE_SIZE; 258 cbp->bio_ma_offset %= PAGE_SIZE; 259 cbp->bio_ma_n = round_page(cbp->bio_ma_offset + 260 cbp->bio_length) / PAGE_SIZE; 261 } else 262 cbp->bio_data = addr; 263 cbp->bio_caller1 = sd; 264 bioq_insert_tail(&queue, cbp); 265 remain -= length; 266 if (bp->bio_cmd != BIO_DELETE) 267 addr += length; 268 offset = 0; 269 no++; 270 } while (remain > 0 && no < vol->v_disks_count); 271 bp->bio_completed = bp->bio_length - remain; 272 while ((cbp = bioq_takefirst(&queue)) != NULL) { 273 sd = cbp->bio_caller1; 274 cbp->bio_caller1 = NULL; 275 g_raid_subdisk_iostart(sd, cbp); 276 } 277 return; 278 failure: 279 while ((cbp = bioq_takefirst(&queue)) != NULL) 280 g_destroy_bio(cbp); 281 if (bp->bio_error == 0) 282 bp->bio_error = ENOMEM; 283 g_raid_iodone(bp, bp->bio_error); 284 } 285 286 static int 287 g_raid_tr_kerneldump_concat(struct g_raid_tr_object *tr, void *virtual, 288 off_t boffset, size_t blength) 289 { 290 struct g_raid_volume *vol; 291 struct g_raid_subdisk *sd; 292 char *addr; 293 off_t offset, length, remain; 294 int error, no; 295 296 vol = tr->tro_volume; 297 if (vol->v_state != G_RAID_VOLUME_S_OPTIMAL) 298 return (ENXIO); 299 300 offset = boffset; 301 remain = blength; 302 addr = virtual; 303 no = 0; 304 while (no < vol->v_disks_count && 305 offset >= vol->v_subdisks[no].sd_size) { 306 offset -= vol->v_subdisks[no].sd_size; 307 no++; 308 } 309 if (no >= vol->v_disks_count) 310 return (EIO); 311 do { 312 sd = &vol->v_subdisks[no]; 313 length = MIN(sd->sd_size - offset, remain); 314 error = g_raid_subdisk_kerneldump(&vol->v_subdisks[no], 315 addr, offset, length); 316 if (error != 0) 317 return (error); 318 remain -= length; 319 addr += length; 320 offset = 0; 321 no++; 322 } while (remain > 0 && no < vol->v_disks_count); 323 if (remain > 0) 324 return (EIO); 325 return (0); 326 } 327 328 static void 329 g_raid_tr_iodone_concat(struct g_raid_tr_object *tr, 330 struct g_raid_subdisk *sd,struct bio *bp) 331 { 332 struct bio *pbp; 333 334 pbp = bp->bio_parent; 335 if (pbp->bio_error == 0) 336 pbp->bio_error = bp->bio_error; 337 g_destroy_bio(bp); 338 pbp->bio_inbed++; 339 if (pbp->bio_children == pbp->bio_inbed) { 340 g_raid_iodone(pbp, pbp->bio_error); 341 } 342 } 343 344 static int 345 g_raid_tr_free_concat(struct g_raid_tr_object *tr) 346 { 347 348 return (0); 349 } 350 351 G_RAID_TR_DECLARE(concat, "CONCAT"); 352