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("$FreeBSD$"); 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_priority = 50 77 }; 78 79 static int 80 g_raid_tr_taste_concat(struct g_raid_tr_object *tr, struct g_raid_volume *volume) 81 { 82 struct g_raid_tr_concat_object *trs; 83 84 trs = (struct g_raid_tr_concat_object *)tr; 85 if (tr->tro_volume->v_raid_level != G_RAID_VOLUME_RL_SINGLE && 86 tr->tro_volume->v_raid_level != G_RAID_VOLUME_RL_CONCAT && 87 !(tr->tro_volume->v_disks_count == 1 && 88 tr->tro_volume->v_raid_level != G_RAID_VOLUME_RL_UNKNOWN)) 89 return (G_RAID_TR_TASTE_FAIL); 90 trs->trso_starting = 1; 91 return (G_RAID_TR_TASTE_SUCCEED); 92 } 93 94 static int 95 g_raid_tr_update_state_concat(struct g_raid_volume *vol) 96 { 97 struct g_raid_tr_concat_object *trs; 98 struct g_raid_softc *sc; 99 off_t size; 100 u_int s; 101 int i, n, f; 102 103 sc = vol->v_softc; 104 trs = (struct g_raid_tr_concat_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) { 121 122 /* 123 * Some metadata modules may not know CONCAT volume 124 * mediasize until all disks connected. Recalculate. 125 */ 126 if (G_RAID_VOLUME_S_ALIVE(s) && 127 !G_RAID_VOLUME_S_ALIVE(vol->v_state)) { 128 size = 0; 129 for (i = 0; i < vol->v_disks_count; i++) { 130 if (vol->v_subdisks[i].sd_state != 131 G_RAID_SUBDISK_S_NONE) 132 size += vol->v_subdisks[i].sd_size; 133 } 134 vol->v_mediasize = size; 135 } 136 137 g_raid_event_send(vol, G_RAID_VOLUME_S_ALIVE(s) ? 138 G_RAID_VOLUME_E_UP : G_RAID_VOLUME_E_DOWN, 139 G_RAID_EVENT_VOLUME); 140 g_raid_change_volume_state(vol, s); 141 if (!trs->trso_starting && !trs->trso_stopped) 142 g_raid_write_metadata(sc, vol, NULL, NULL); 143 } 144 return (0); 145 } 146 147 static int 148 g_raid_tr_event_concat(struct g_raid_tr_object *tr, 149 struct g_raid_subdisk *sd, u_int event) 150 { 151 struct g_raid_tr_concat_object *trs; 152 struct g_raid_softc *sc; 153 struct g_raid_volume *vol; 154 int state; 155 156 trs = (struct g_raid_tr_concat_object *)tr; 157 vol = tr->tro_volume; 158 sc = vol->v_softc; 159 160 state = sd->sd_state; 161 if (state != G_RAID_SUBDISK_S_NONE && 162 state != G_RAID_SUBDISK_S_FAILED && 163 state != G_RAID_SUBDISK_S_ACTIVE) { 164 G_RAID_DEBUG1(1, sc, 165 "Promote subdisk %s:%d from %s to ACTIVE.", 166 vol->v_name, sd->sd_pos, 167 g_raid_subdisk_state2str(sd->sd_state)); 168 g_raid_change_subdisk_state(sd, G_RAID_SUBDISK_S_ACTIVE); 169 } 170 if (state != sd->sd_state && 171 !trs->trso_starting && !trs->trso_stopped) 172 g_raid_write_metadata(sc, vol, sd, NULL); 173 g_raid_tr_update_state_concat(vol); 174 return (0); 175 } 176 177 static int 178 g_raid_tr_start_concat(struct g_raid_tr_object *tr) 179 { 180 struct g_raid_tr_concat_object *trs; 181 struct g_raid_volume *vol; 182 183 trs = (struct g_raid_tr_concat_object *)tr; 184 vol = tr->tro_volume; 185 trs->trso_starting = 0; 186 g_raid_tr_update_state_concat(vol); 187 return (0); 188 } 189 190 static int 191 g_raid_tr_stop_concat(struct g_raid_tr_object *tr) 192 { 193 struct g_raid_tr_concat_object *trs; 194 struct g_raid_volume *vol; 195 196 trs = (struct g_raid_tr_concat_object *)tr; 197 vol = tr->tro_volume; 198 trs->trso_starting = 0; 199 trs->trso_stopped = 1; 200 g_raid_tr_update_state_concat(vol); 201 return (0); 202 } 203 204 static void 205 g_raid_tr_iostart_concat(struct g_raid_tr_object *tr, struct bio *bp) 206 { 207 struct g_raid_volume *vol; 208 struct g_raid_subdisk *sd; 209 struct bio_queue_head queue; 210 struct bio *cbp; 211 char *addr; 212 off_t offset, length, remain; 213 u_int no; 214 215 vol = tr->tro_volume; 216 if (vol->v_state != G_RAID_VOLUME_S_OPTIMAL && 217 vol->v_state != G_RAID_VOLUME_S_SUBOPTIMAL) { 218 g_raid_iodone(bp, EIO); 219 return; 220 } 221 if (bp->bio_cmd == BIO_FLUSH) { 222 g_raid_tr_flush_common(tr, bp); 223 return; 224 } 225 226 offset = bp->bio_offset; 227 remain = bp->bio_length; 228 addr = bp->bio_data; 229 no = 0; 230 while (no < vol->v_disks_count && 231 offset >= vol->v_subdisks[no].sd_size) { 232 offset -= vol->v_subdisks[no].sd_size; 233 no++; 234 } 235 KASSERT(no < vol->v_disks_count, 236 ("Request starts after volume end (%ju)", bp->bio_offset)); 237 bioq_init(&queue); 238 do { 239 sd = &vol->v_subdisks[no]; 240 length = MIN(sd->sd_size - offset, remain); 241 cbp = g_clone_bio(bp); 242 if (cbp == NULL) 243 goto failure; 244 cbp->bio_offset = offset; 245 cbp->bio_data = addr; 246 cbp->bio_length = length; 247 cbp->bio_caller1 = sd; 248 bioq_insert_tail(&queue, cbp); 249 remain -= length; 250 addr += length; 251 offset = 0; 252 no++; 253 KASSERT(no < vol->v_disks_count || remain == 0, 254 ("Request ends after volume end (%ju, %ju)", 255 bp->bio_offset, bp->bio_length)); 256 } while (remain > 0); 257 for (cbp = bioq_first(&queue); cbp != NULL; 258 cbp = bioq_first(&queue)) { 259 bioq_remove(&queue, cbp); 260 sd = cbp->bio_caller1; 261 cbp->bio_caller1 = NULL; 262 g_raid_subdisk_iostart(sd, cbp); 263 } 264 return; 265 failure: 266 for (cbp = bioq_first(&queue); cbp != NULL; 267 cbp = bioq_first(&queue)) { 268 bioq_remove(&queue, cbp); 269 g_destroy_bio(cbp); 270 } 271 if (bp->bio_error == 0) 272 bp->bio_error = ENOMEM; 273 g_raid_iodone(bp, bp->bio_error); 274 } 275 276 static int 277 g_raid_tr_kerneldump_concat(struct g_raid_tr_object *tr, 278 void *virtual, vm_offset_t physical, off_t boffset, size_t blength) 279 { 280 struct g_raid_volume *vol; 281 struct g_raid_subdisk *sd; 282 char *addr; 283 off_t offset, length, remain; 284 int error, no; 285 286 vol = tr->tro_volume; 287 if (vol->v_state != G_RAID_VOLUME_S_OPTIMAL) 288 return (ENXIO); 289 290 offset = boffset; 291 remain = blength; 292 addr = virtual; 293 no = 0; 294 while (no < vol->v_disks_count && 295 offset >= vol->v_subdisks[no].sd_size) { 296 offset -= vol->v_subdisks[no].sd_size; 297 no++; 298 } 299 KASSERT(no < vol->v_disks_count, 300 ("Request starts after volume end (%ju)", boffset)); 301 do { 302 sd = &vol->v_subdisks[no]; 303 length = MIN(sd->sd_size - offset, remain); 304 error = g_raid_subdisk_kerneldump(&vol->v_subdisks[no], 305 addr, 0, offset, length); 306 if (error != 0) 307 return (error); 308 remain -= length; 309 addr += length; 310 offset = 0; 311 no++; 312 KASSERT(no < vol->v_disks_count || remain == 0, 313 ("Request ends after volume end (%ju, %zu)", 314 boffset, blength)); 315 } while (remain > 0); 316 return (0); 317 } 318 319 static void 320 g_raid_tr_iodone_concat(struct g_raid_tr_object *tr, 321 struct g_raid_subdisk *sd,struct bio *bp) 322 { 323 struct bio *pbp; 324 325 pbp = bp->bio_parent; 326 if (pbp->bio_error == 0) 327 pbp->bio_error = bp->bio_error; 328 g_destroy_bio(bp); 329 pbp->bio_inbed++; 330 if (pbp->bio_children == pbp->bio_inbed) { 331 pbp->bio_completed = pbp->bio_length; 332 g_raid_iodone(pbp, bp->bio_error); 333 } 334 } 335 336 static int 337 g_raid_tr_free_concat(struct g_raid_tr_object *tr) 338 { 339 340 return (0); 341 } 342 343 G_RAID_TR_DECLARE(g_raid_tr_concat); 344