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 * Copyright (c) 2010 Alexander Motin <mav@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD: releng/10.0/sys/geom/raid/tr_concat.c 245519 2013-01-17 00:09:50Z mav $"); 29 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/raid/g_raid.h" 41 #include "g_raid_tr_if.h" 42 43 static MALLOC_DEFINE(M_TR_CONCAT, "tr_concat_data", "GEOM_RAID CONCAT data"); 44 45 struct g_raid_tr_concat_object { 46 struct g_raid_tr_object trso_base; 47 int trso_starting; 48 int trso_stopped; 49 }; 50 51 static g_raid_tr_taste_t g_raid_tr_taste_concat; 52 static g_raid_tr_event_t g_raid_tr_event_concat; 53 static g_raid_tr_start_t g_raid_tr_start_concat; 54 static g_raid_tr_stop_t g_raid_tr_stop_concat; 55 static g_raid_tr_iostart_t g_raid_tr_iostart_concat; 56 static g_raid_tr_iodone_t g_raid_tr_iodone_concat; 57 static g_raid_tr_kerneldump_t g_raid_tr_kerneldump_concat; 58 static g_raid_tr_free_t g_raid_tr_free_concat; 59 60 static kobj_method_t g_raid_tr_concat_methods[] = { 61 KOBJMETHOD(g_raid_tr_taste, g_raid_tr_taste_concat), 62 KOBJMETHOD(g_raid_tr_event, g_raid_tr_event_concat), 63 KOBJMETHOD(g_raid_tr_start, g_raid_tr_start_concat), 64 KOBJMETHOD(g_raid_tr_stop, g_raid_tr_stop_concat), 65 KOBJMETHOD(g_raid_tr_iostart, g_raid_tr_iostart_concat), 66 KOBJMETHOD(g_raid_tr_iodone, g_raid_tr_iodone_concat), 67 KOBJMETHOD(g_raid_tr_kerneldump, g_raid_tr_kerneldump_concat), 68 KOBJMETHOD(g_raid_tr_free, g_raid_tr_free_concat), 69 { 0, 0 } 70 }; 71 72 static struct g_raid_tr_class g_raid_tr_concat_class = { 73 "CONCAT", 74 g_raid_tr_concat_methods, 75 sizeof(struct g_raid_tr_concat_object), 76 .trc_enable = 1, 77 .trc_priority = 50 78 }; 79 80 static int 81 g_raid_tr_taste_concat(struct g_raid_tr_object *tr, struct g_raid_volume *volume) 82 { 83 struct g_raid_tr_concat_object *trs; 84 85 trs = (struct g_raid_tr_concat_object *)tr; 86 if (tr->tro_volume->v_raid_level != G_RAID_VOLUME_RL_SINGLE && 87 tr->tro_volume->v_raid_level != G_RAID_VOLUME_RL_CONCAT && 88 !(tr->tro_volume->v_disks_count == 1 && 89 tr->tro_volume->v_raid_level != G_RAID_VOLUME_RL_UNKNOWN)) 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_concat(struct g_raid_volume *vol) 97 { 98 struct g_raid_tr_concat_object *trs; 99 struct g_raid_softc *sc; 100 off_t size; 101 u_int s; 102 int i, n, f; 103 104 sc = vol->v_softc; 105 trs = (struct g_raid_tr_concat_object *)vol->v_tr; 106 if (trs->trso_stopped) 107 s = G_RAID_VOLUME_S_STOPPED; 108 else if (trs->trso_starting) 109 s = G_RAID_VOLUME_S_STARTING; 110 else { 111 n = g_raid_nsubdisks(vol, G_RAID_SUBDISK_S_ACTIVE); 112 f = g_raid_nsubdisks(vol, G_RAID_SUBDISK_S_FAILED); 113 if (n + f == vol->v_disks_count) { 114 if (f == 0) 115 s = G_RAID_VOLUME_S_OPTIMAL; 116 else 117 s = G_RAID_VOLUME_S_SUBOPTIMAL; 118 } else 119 s = G_RAID_VOLUME_S_BROKEN; 120 } 121 if (s != vol->v_state) { 122 123 /* 124 * Some metadata modules may not know CONCAT volume 125 * mediasize until all disks connected. Recalculate. 126 */ 127 if (vol->v_raid_level == G_RAID_VOLUME_RL_CONCAT && 128 G_RAID_VOLUME_S_ALIVE(s) && 129 !G_RAID_VOLUME_S_ALIVE(vol->v_state)) { 130 size = 0; 131 for (i = 0; i < vol->v_disks_count; i++) { 132 if (vol->v_subdisks[i].sd_state != 133 G_RAID_SUBDISK_S_NONE) 134 size += vol->v_subdisks[i].sd_size; 135 } 136 vol->v_mediasize = size; 137 } 138 139 g_raid_event_send(vol, G_RAID_VOLUME_S_ALIVE(s) ? 140 G_RAID_VOLUME_E_UP : G_RAID_VOLUME_E_DOWN, 141 G_RAID_EVENT_VOLUME); 142 g_raid_change_volume_state(vol, s); 143 if (!trs->trso_starting && !trs->trso_stopped) 144 g_raid_write_metadata(sc, vol, NULL, NULL); 145 } 146 return (0); 147 } 148 149 static int 150 g_raid_tr_event_concat(struct g_raid_tr_object *tr, 151 struct g_raid_subdisk *sd, u_int event) 152 { 153 struct g_raid_tr_concat_object *trs; 154 struct g_raid_softc *sc; 155 struct g_raid_volume *vol; 156 int state; 157 158 trs = (struct g_raid_tr_concat_object *)tr; 159 vol = tr->tro_volume; 160 sc = vol->v_softc; 161 162 state = sd->sd_state; 163 if (state != G_RAID_SUBDISK_S_NONE && 164 state != G_RAID_SUBDISK_S_FAILED && 165 state != G_RAID_SUBDISK_S_ACTIVE) { 166 G_RAID_DEBUG1(1, sc, 167 "Promote subdisk %s:%d from %s to ACTIVE.", 168 vol->v_name, sd->sd_pos, 169 g_raid_subdisk_state2str(sd->sd_state)); 170 g_raid_change_subdisk_state(sd, G_RAID_SUBDISK_S_ACTIVE); 171 } 172 if (state != sd->sd_state && 173 !trs->trso_starting && !trs->trso_stopped) 174 g_raid_write_metadata(sc, vol, sd, NULL); 175 g_raid_tr_update_state_concat(vol); 176 return (0); 177 } 178 179 static int 180 g_raid_tr_start_concat(struct g_raid_tr_object *tr) 181 { 182 struct g_raid_tr_concat_object *trs; 183 struct g_raid_volume *vol; 184 185 trs = (struct g_raid_tr_concat_object *)tr; 186 vol = tr->tro_volume; 187 trs->trso_starting = 0; 188 g_raid_tr_update_state_concat(vol); 189 return (0); 190 } 191 192 static int 193 g_raid_tr_stop_concat(struct g_raid_tr_object *tr) 194 { 195 struct g_raid_tr_concat_object *trs; 196 struct g_raid_volume *vol; 197 198 trs = (struct g_raid_tr_concat_object *)tr; 199 vol = tr->tro_volume; 200 trs->trso_starting = 0; 201 trs->trso_stopped = 1; 202 g_raid_tr_update_state_concat(vol); 203 return (0); 204 } 205 206 static void 207 g_raid_tr_iostart_concat(struct g_raid_tr_object *tr, struct bio *bp) 208 { 209 struct g_raid_volume *vol; 210 struct g_raid_subdisk *sd; 211 struct bio_queue_head queue; 212 struct bio *cbp; 213 char *addr; 214 off_t offset, length, remain; 215 u_int no; 216 217 vol = tr->tro_volume; 218 if (vol->v_state != G_RAID_VOLUME_S_OPTIMAL && 219 vol->v_state != G_RAID_VOLUME_S_SUBOPTIMAL) { 220 g_raid_iodone(bp, EIO); 221 return; 222 } 223 if (bp->bio_cmd == BIO_FLUSH) { 224 g_raid_tr_flush_common(tr, bp); 225 return; 226 } 227 228 offset = bp->bio_offset; 229 remain = bp->bio_length; 230 addr = bp->bio_data; 231 no = 0; 232 while (no < vol->v_disks_count && 233 offset >= vol->v_subdisks[no].sd_size) { 234 offset -= vol->v_subdisks[no].sd_size; 235 no++; 236 } 237 KASSERT(no < vol->v_disks_count, 238 ("Request starts after volume end (%ju)", bp->bio_offset)); 239 bioq_init(&queue); 240 do { 241 sd = &vol->v_subdisks[no]; 242 length = MIN(sd->sd_size - offset, remain); 243 cbp = g_clone_bio(bp); 244 if (cbp == NULL) 245 goto failure; 246 cbp->bio_offset = offset; 247 cbp->bio_data = addr; 248 cbp->bio_length = length; 249 cbp->bio_caller1 = sd; 250 bioq_insert_tail(&queue, cbp); 251 remain -= length; 252 if (bp->bio_cmd != BIO_DELETE) 253 addr += length; 254 offset = 0; 255 no++; 256 KASSERT(no < vol->v_disks_count || remain == 0, 257 ("Request ends after volume end (%ju, %ju)", 258 bp->bio_offset, bp->bio_length)); 259 } while (remain > 0); 260 for (cbp = bioq_first(&queue); cbp != NULL; 261 cbp = bioq_first(&queue)) { 262 bioq_remove(&queue, cbp); 263 sd = cbp->bio_caller1; 264 cbp->bio_caller1 = NULL; 265 g_raid_subdisk_iostart(sd, cbp); 266 } 267 return; 268 failure: 269 for (cbp = bioq_first(&queue); cbp != NULL; 270 cbp = bioq_first(&queue)) { 271 bioq_remove(&queue, cbp); 272 g_destroy_bio(cbp); 273 } 274 if (bp->bio_error == 0) 275 bp->bio_error = ENOMEM; 276 g_raid_iodone(bp, bp->bio_error); 277 } 278 279 static int 280 g_raid_tr_kerneldump_concat(struct g_raid_tr_object *tr, 281 void *virtual, vm_offset_t physical, off_t boffset, size_t blength) 282 { 283 struct g_raid_volume *vol; 284 struct g_raid_subdisk *sd; 285 char *addr; 286 off_t offset, length, remain; 287 int error, no; 288 289 vol = tr->tro_volume; 290 if (vol->v_state != G_RAID_VOLUME_S_OPTIMAL) 291 return (ENXIO); 292 293 offset = boffset; 294 remain = blength; 295 addr = virtual; 296 no = 0; 297 while (no < vol->v_disks_count && 298 offset >= vol->v_subdisks[no].sd_size) { 299 offset -= vol->v_subdisks[no].sd_size; 300 no++; 301 } 302 KASSERT(no < vol->v_disks_count, 303 ("Request starts after volume end (%ju)", boffset)); 304 do { 305 sd = &vol->v_subdisks[no]; 306 length = MIN(sd->sd_size - offset, remain); 307 error = g_raid_subdisk_kerneldump(&vol->v_subdisks[no], 308 addr, 0, offset, length); 309 if (error != 0) 310 return (error); 311 remain -= length; 312 addr += length; 313 offset = 0; 314 no++; 315 KASSERT(no < vol->v_disks_count || remain == 0, 316 ("Request ends after volume end (%ju, %zu)", 317 boffset, blength)); 318 } while (remain > 0); 319 return (0); 320 } 321 322 static void 323 g_raid_tr_iodone_concat(struct g_raid_tr_object *tr, 324 struct g_raid_subdisk *sd,struct bio *bp) 325 { 326 struct bio *pbp; 327 328 pbp = bp->bio_parent; 329 if (pbp->bio_error == 0) 330 pbp->bio_error = bp->bio_error; 331 g_destroy_bio(bp); 332 pbp->bio_inbed++; 333 if (pbp->bio_children == pbp->bio_inbed) { 334 pbp->bio_completed = pbp->bio_length; 335 g_raid_iodone(pbp, bp->bio_error); 336 } 337 } 338 339 static int 340 g_raid_tr_free_concat(struct g_raid_tr_object *tr) 341 { 342 343 return (0); 344 } 345 346 G_RAID_TR_DECLARE(concat, "CONCAT");
Cache object: f265dfcd4c8f847d9e7711bc764c85b3
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