Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/geom/raid/tr_concat.c
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1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 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 __FBSDID("$FreeBSD$"); 31 32 #include <sys/param.h> 33 #include <sys/bio.h> 34 #include <sys/endian.h> 35 #include <sys/kernel.h> 36 #include <sys/kobj.h> 37 #include <sys/lock.h> 38 #include <sys/malloc.h> 39 #include <sys/mutex.h> 40 #include <sys/systm.h> 41 #include <geom/geom.h> 42 #include <geom/geom_dbg.h> 43 #include "geom/raid/g_raid.h" 44 #include "g_raid_tr_if.h" 45 46 static MALLOC_DEFINE(M_TR_CONCAT, "tr_concat_data", "GEOM_RAID CONCAT data"); 47 48 struct g_raid_tr_concat_object { 49 struct g_raid_tr_object trso_base; 50 int trso_starting; 51 int trso_stopped; 52 }; 53 54 static g_raid_tr_taste_t g_raid_tr_taste_concat; 55 static g_raid_tr_event_t g_raid_tr_event_concat; 56 static g_raid_tr_start_t g_raid_tr_start_concat; 57 static g_raid_tr_stop_t g_raid_tr_stop_concat; 58 static g_raid_tr_iostart_t g_raid_tr_iostart_concat; 59 static g_raid_tr_iodone_t g_raid_tr_iodone_concat; 60 static g_raid_tr_kerneldump_t g_raid_tr_kerneldump_concat; 61 static g_raid_tr_free_t g_raid_tr_free_concat; 62 63 static kobj_method_t g_raid_tr_concat_methods[] = { 64 KOBJMETHOD(g_raid_tr_taste, g_raid_tr_taste_concat), 65 KOBJMETHOD(g_raid_tr_event, g_raid_tr_event_concat), 66 KOBJMETHOD(g_raid_tr_start, g_raid_tr_start_concat), 67 KOBJMETHOD(g_raid_tr_stop, g_raid_tr_stop_concat), 68 KOBJMETHOD(g_raid_tr_iostart, g_raid_tr_iostart_concat), 69 KOBJMETHOD(g_raid_tr_iodone, g_raid_tr_iodone_concat), 70 KOBJMETHOD(g_raid_tr_kerneldump, g_raid_tr_kerneldump_concat), 71 KOBJMETHOD(g_raid_tr_free, g_raid_tr_free_concat), 72 { 0, 0 } 73 }; 74 75 static struct g_raid_tr_class g_raid_tr_concat_class = { 76 "CONCAT", 77 g_raid_tr_concat_methods, 78 sizeof(struct g_raid_tr_concat_object), 79 .trc_enable = 1, 80 .trc_priority = 50, 81 .trc_accept_unmapped = 1 82 }; 83 84 static int 85 g_raid_tr_taste_concat(struct g_raid_tr_object *tr, struct g_raid_volume *volume) 86 { 87 struct g_raid_tr_concat_object *trs; 88 89 trs = (struct g_raid_tr_concat_object *)tr; 90 if (tr->tro_volume->v_raid_level != G_RAID_VOLUME_RL_SINGLE && 91 tr->tro_volume->v_raid_level != G_RAID_VOLUME_RL_CONCAT && 92 !(tr->tro_volume->v_disks_count == 1 && 93 tr->tro_volume->v_raid_level != G_RAID_VOLUME_RL_UNKNOWN)) 94 return (G_RAID_TR_TASTE_FAIL); 95 trs->trso_starting = 1; 96 return (G_RAID_TR_TASTE_SUCCEED); 97 } 98 99 static int 100 g_raid_tr_update_state_concat(struct g_raid_volume *vol) 101 { 102 struct g_raid_tr_concat_object *trs; 103 struct g_raid_softc *sc; 104 off_t size; 105 u_int s; 106 int i, n, f; 107 108 sc = vol->v_softc; 109 trs = (struct g_raid_tr_concat_object *)vol->v_tr; 110 if (trs->trso_stopped) 111 s = G_RAID_VOLUME_S_STOPPED; 112 else if (trs->trso_starting) 113 s = G_RAID_VOLUME_S_STARTING; 114 else { 115 n = g_raid_nsubdisks(vol, G_RAID_SUBDISK_S_ACTIVE); 116 f = g_raid_nsubdisks(vol, G_RAID_SUBDISK_S_FAILED); 117 if (n + f == vol->v_disks_count) { 118 if (f == 0) 119 s = G_RAID_VOLUME_S_OPTIMAL; 120 else 121 s = G_RAID_VOLUME_S_SUBOPTIMAL; 122 } else 123 s = G_RAID_VOLUME_S_BROKEN; 124 } 125 if (s != vol->v_state) { 126 /* 127 * Some metadata modules may not know CONCAT volume 128 * mediasize until all disks connected. Recalculate. 129 */ 130 if (vol->v_raid_level == G_RAID_VOLUME_RL_CONCAT && 131 G_RAID_VOLUME_S_ALIVE(s) && 132 !G_RAID_VOLUME_S_ALIVE(vol->v_state)) { 133 size = 0; 134 for (i = 0; i < vol->v_disks_count; i++) { 135 if (vol->v_subdisks[i].sd_state != 136 G_RAID_SUBDISK_S_NONE) 137 size += vol->v_subdisks[i].sd_size; 138 } 139 vol->v_mediasize = size; 140 } 141 142 g_raid_event_send(vol, G_RAID_VOLUME_S_ALIVE(s) ? 143 G_RAID_VOLUME_E_UP : G_RAID_VOLUME_E_DOWN, 144 G_RAID_EVENT_VOLUME); 145 g_raid_change_volume_state(vol, s); 146 if (!trs->trso_starting && !trs->trso_stopped) 147 g_raid_write_metadata(sc, vol, NULL, NULL); 148 } 149 return (0); 150 } 151 152 static int 153 g_raid_tr_event_concat(struct g_raid_tr_object *tr, 154 struct g_raid_subdisk *sd, u_int event) 155 { 156 struct g_raid_tr_concat_object *trs; 157 struct g_raid_softc *sc; 158 struct g_raid_volume *vol; 159 int state; 160 161 trs = (struct g_raid_tr_concat_object *)tr; 162 vol = tr->tro_volume; 163 sc = vol->v_softc; 164 165 state = sd->sd_state; 166 if (state != G_RAID_SUBDISK_S_NONE && 167 state != G_RAID_SUBDISK_S_FAILED && 168 state != G_RAID_SUBDISK_S_ACTIVE) { 169 G_RAID_DEBUG1(1, sc, 170 "Promote subdisk %s:%d from %s to ACTIVE.", 171 vol->v_name, sd->sd_pos, 172 g_raid_subdisk_state2str(sd->sd_state)); 173 g_raid_change_subdisk_state(sd, G_RAID_SUBDISK_S_ACTIVE); 174 } 175 if (state != sd->sd_state && 176 !trs->trso_starting && !trs->trso_stopped) 177 g_raid_write_metadata(sc, vol, sd, NULL); 178 g_raid_tr_update_state_concat(vol); 179 return (0); 180 } 181 182 static int 183 g_raid_tr_start_concat(struct g_raid_tr_object *tr) 184 { 185 struct g_raid_tr_concat_object *trs; 186 struct g_raid_volume *vol; 187 188 trs = (struct g_raid_tr_concat_object *)tr; 189 vol = tr->tro_volume; 190 trs->trso_starting = 0; 191 g_raid_tr_update_state_concat(vol); 192 return (0); 193 } 194 195 static int 196 g_raid_tr_stop_concat(struct g_raid_tr_object *tr) 197 { 198 struct g_raid_tr_concat_object *trs; 199 struct g_raid_volume *vol; 200 201 trs = (struct g_raid_tr_concat_object *)tr; 202 vol = tr->tro_volume; 203 trs->trso_starting = 0; 204 trs->trso_stopped = 1; 205 g_raid_tr_update_state_concat(vol); 206 return (0); 207 } 208 209 static void 210 g_raid_tr_iostart_concat(struct g_raid_tr_object *tr, struct bio *bp) 211 { 212 struct g_raid_volume *vol; 213 struct g_raid_subdisk *sd; 214 struct bio_queue_head queue; 215 struct bio *cbp; 216 char *addr; 217 off_t offset, length, remain; 218 u_int no; 219 220 vol = tr->tro_volume; 221 if (vol->v_state != G_RAID_VOLUME_S_OPTIMAL && 222 vol->v_state != G_RAID_VOLUME_S_SUBOPTIMAL) { 223 g_raid_iodone(bp, EIO); 224 return; 225 } 226 if (bp->bio_cmd == BIO_FLUSH || bp->bio_cmd == BIO_SPEEDUP) { 227 g_raid_tr_flush_common(tr, bp); 228 return; 229 } 230 231 offset = bp->bio_offset; 232 remain = bp->bio_length; 233 if ((bp->bio_flags & BIO_UNMAPPED) != 0) 234 addr = NULL; 235 else 236 addr = bp->bio_data; 237 no = 0; 238 while (no < vol->v_disks_count && 239 offset >= vol->v_subdisks[no].sd_size) { 240 offset -= vol->v_subdisks[no].sd_size; 241 no++; 242 } 243 KASSERT(no < vol->v_disks_count, 244 ("Request starts after volume end (%ju)", bp->bio_offset)); 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 KASSERT(no < vol->v_disks_count || remain == 0, 271 ("Request ends after volume end (%ju, %ju)", 272 bp->bio_offset, bp->bio_length)); 273 } while (remain > 0); 274 while ((cbp = bioq_takefirst(&queue)) != NULL) { 275 sd = cbp->bio_caller1; 276 cbp->bio_caller1 = NULL; 277 g_raid_subdisk_iostart(sd, cbp); 278 } 279 return; 280 failure: 281 while ((cbp = bioq_takefirst(&queue)) != NULL) 282 g_destroy_bio(cbp); 283 if (bp->bio_error == 0) 284 bp->bio_error = ENOMEM; 285 g_raid_iodone(bp, bp->bio_error); 286 } 287 288 static int 289 g_raid_tr_kerneldump_concat(struct g_raid_tr_object *tr, void *virtual, 290 off_t boffset, size_t blength) 291 { 292 struct g_raid_volume *vol; 293 struct g_raid_subdisk *sd; 294 char *addr; 295 off_t offset, length, remain; 296 int error, no; 297 298 vol = tr->tro_volume; 299 if (vol->v_state != G_RAID_VOLUME_S_OPTIMAL) 300 return (ENXIO); 301 302 offset = boffset; 303 remain = blength; 304 addr = virtual; 305 no = 0; 306 while (no < vol->v_disks_count && 307 offset >= vol->v_subdisks[no].sd_size) { 308 offset -= vol->v_subdisks[no].sd_size; 309 no++; 310 } 311 KASSERT(no < vol->v_disks_count, 312 ("Request starts after volume end (%ju)", boffset)); 313 do { 314 sd = &vol->v_subdisks[no]; 315 length = MIN(sd->sd_size - offset, remain); 316 error = g_raid_subdisk_kerneldump(&vol->v_subdisks[no], 317 addr, offset, length); 318 if (error != 0) 319 return (error); 320 remain -= length; 321 addr += length; 322 offset = 0; 323 no++; 324 KASSERT(no < vol->v_disks_count || remain == 0, 325 ("Request ends after volume end (%ju, %zu)", 326 boffset, blength)); 327 } while (remain > 0); 328 return (0); 329 } 330 331 static void 332 g_raid_tr_iodone_concat(struct g_raid_tr_object *tr, 333 struct g_raid_subdisk *sd,struct bio *bp) 334 { 335 struct bio *pbp; 336 337 pbp = bp->bio_parent; 338 if (pbp->bio_error == 0) 339 pbp->bio_error = bp->bio_error; 340 g_destroy_bio(bp); 341 pbp->bio_inbed++; 342 if (pbp->bio_children == pbp->bio_inbed) { 343 pbp->bio_completed = pbp->bio_length; 344 g_raid_iodone(pbp, pbp->bio_error); 345 } 346 } 347 348 static int 349 g_raid_tr_free_concat(struct g_raid_tr_object *tr) 350 { 351 352 return (0); 353 } 354 355 G_RAID_TR_DECLARE(concat, "CONCAT");
Cache object: 6d956b851adcda8b417fd9c3814715ed
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