| 1 | /* $NetBSD: ld_ataraid.c,v 1.44 2016/09/27 08:05:34 pgoyette Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright (c) 2003 Wasabi Systems, Inc. |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * Written by Jason R. Thorpe for Wasabi Systems, Inc. |
| 8 | * |
| 9 | * Redistribution and use in source and binary forms, with or without |
| 10 | * modification, are permitted provided that the following conditions |
| 11 | * are met: |
| 12 | * 1. Redistributions of source code must retain the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer. |
| 14 | * 2. Redistributions in binary form must reproduce the above copyright |
| 15 | * notice, this list of conditions and the following disclaimer in the |
| 16 | * documentation and/or other materials provided with the distribution. |
| 17 | * 3. All advertising materials mentioning features or use of this software |
| 18 | * must display the following acknowledgement: |
| 19 | * This product includes software developed for the NetBSD Project by |
| 20 | * Wasabi Systems, Inc. |
| 21 | * 4. The name of Wasabi Systems, Inc. may not be used to endorse |
| 22 | * or promote products derived from this software without specific prior |
| 23 | * written permission. |
| 24 | * |
| 25 | * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND |
| 26 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
| 27 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 28 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC |
| 29 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 30 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 31 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 32 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 33 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 34 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 35 | * POSSIBILITY OF SUCH DAMAGE. |
| 36 | */ |
| 37 | |
| 38 | /* |
| 39 | * Support for ATA RAID logical disks. |
| 40 | * |
| 41 | * Note that all the RAID happens in software here; the ATA RAID |
| 42 | * controllers we're dealing with (Promise, etc.) only support |
| 43 | * configuration data on the component disks, with the BIOS supporting |
| 44 | * booting from the RAID volumes. |
| 45 | * |
| 46 | * bio(4) support was written by Juan Romero Pardines <xtraeme@gmail.com>. |
| 47 | */ |
| 48 | |
| 49 | #include <sys/cdefs.h> |
| 50 | __KERNEL_RCSID(0, "$NetBSD: ld_ataraid.c,v 1.44 2016/09/27 08:05:34 pgoyette Exp $" ); |
| 51 | |
| 52 | #if defined(_KERNEL_OPT) |
| 53 | #include "bio.h" |
| 54 | #endif |
| 55 | |
| 56 | #include <sys/param.h> |
| 57 | #include <sys/systm.h> |
| 58 | #include <sys/conf.h> |
| 59 | #include <sys/kernel.h> |
| 60 | #include <sys/device.h> |
| 61 | #include <sys/buf.h> |
| 62 | #include <sys/bufq.h> |
| 63 | #include <sys/dkio.h> |
| 64 | #include <sys/disk.h> |
| 65 | #include <sys/disklabel.h> |
| 66 | #include <sys/fcntl.h> |
| 67 | #include <sys/malloc.h> |
| 68 | #include <sys/vnode.h> |
| 69 | #include <sys/kauth.h> |
| 70 | #include <sys/module.h> |
| 71 | #if NBIO > 0 |
| 72 | #include <dev/ata/atavar.h> |
| 73 | #include <dev/ata/atareg.h> |
| 74 | #include <dev/ata/wdvar.h> |
| 75 | #include <dev/biovar.h> |
| 76 | #include <dev/scsipi/scsipiconf.h> /* for scsipi_strvis() */ |
| 77 | #endif |
| 78 | |
| 79 | #include <miscfs/specfs/specdev.h> |
| 80 | |
| 81 | #include <dev/ldvar.h> |
| 82 | |
| 83 | #include <dev/ata/ata_raidvar.h> |
| 84 | |
| 85 | #include "ioconf.h" |
| 86 | |
| 87 | struct ld_ataraid_softc { |
| 88 | struct ld_softc sc_ld; |
| 89 | |
| 90 | struct ataraid_array_info *sc_aai; |
| 91 | struct vnode *sc_vnodes[ATA_RAID_MAX_DISKS]; |
| 92 | |
| 93 | void (*sc_iodone)(struct buf *); |
| 94 | |
| 95 | pool_cache_t sc_cbufpool; |
| 96 | |
| 97 | SIMPLEQ_HEAD(, cbuf) sc_cbufq; |
| 98 | |
| 99 | void *sc_sih_cookie; |
| 100 | }; |
| 101 | |
| 102 | static int ld_ataraid_match(device_t, cfdata_t, void *); |
| 103 | static void ld_ataraid_attach(device_t, device_t, void *); |
| 104 | |
| 105 | static int ld_ataraid_dump(struct ld_softc *, void *, int, int); |
| 106 | |
| 107 | static int cbufpool_ctor(void *, void *, int); |
| 108 | static void cbufpool_dtor(void *, void *); |
| 109 | |
| 110 | static void ld_ataraid_start_vstrategy(void *); |
| 111 | static int ld_ataraid_start_span(struct ld_softc *, struct buf *); |
| 112 | |
| 113 | static int ld_ataraid_start_raid0(struct ld_softc *, struct buf *); |
| 114 | static void ld_ataraid_iodone_raid0(struct buf *); |
| 115 | |
| 116 | #if NBIO > 0 |
| 117 | static int ld_ataraid_bioctl(device_t, u_long, void *); |
| 118 | static int ld_ataraid_bioinq(struct ld_ataraid_softc *, struct bioc_inq *); |
| 119 | static int ld_ataraid_biovol(struct ld_ataraid_softc *, struct bioc_vol *); |
| 120 | static int ld_ataraid_biodisk(struct ld_ataraid_softc *, |
| 121 | struct bioc_disk *); |
| 122 | #endif |
| 123 | |
| 124 | CFATTACH_DECL_NEW(ld_ataraid, sizeof(struct ld_ataraid_softc), |
| 125 | ld_ataraid_match, ld_ataraid_attach, NULL, NULL); |
| 126 | |
| 127 | struct cbuf { |
| 128 | struct buf cb_buf; /* new I/O buf */ |
| 129 | struct buf *cb_obp; /* ptr. to original I/O buf */ |
| 130 | struct ld_ataraid_softc *cb_sc; /* pointer to ld softc */ |
| 131 | u_int cb_comp; /* target component */ |
| 132 | SIMPLEQ_ENTRY(cbuf) cb_q; /* fifo of component buffers */ |
| 133 | struct cbuf *cb_other; /* other cbuf in case of mirror */ |
| 134 | int cb_flags; |
| 135 | #define CBUF_IODONE 0x00000001 /* I/O is already successfully done */ |
| 136 | }; |
| 137 | |
| 138 | #define CBUF_GET() pool_cache_get(sc->sc_cbufpool, PR_NOWAIT); |
| 139 | #define CBUF_PUT(cbp) pool_cache_put(sc->sc_cbufpool, (cbp)) |
| 140 | |
| 141 | static int |
| 142 | ld_ataraid_match(device_t parent, cfdata_t match, void *aux) |
| 143 | { |
| 144 | |
| 145 | return (1); |
| 146 | } |
| 147 | |
| 148 | static void |
| 149 | ld_ataraid_attach(device_t parent, device_t self, void *aux) |
| 150 | { |
| 151 | struct ld_ataraid_softc *sc = device_private(self); |
| 152 | struct ld_softc *ld = &sc->sc_ld; |
| 153 | struct ataraid_array_info *aai = aux; |
| 154 | struct ataraid_disk_info *adi = NULL; |
| 155 | const char *level; |
| 156 | struct vnode *vp; |
| 157 | char unklev[32]; |
| 158 | u_int i; |
| 159 | |
| 160 | ld->sc_dv = self; |
| 161 | |
| 162 | sc->sc_cbufpool = pool_cache_init(sizeof(struct cbuf), 0, |
| 163 | 0, 0, "ldcbuf" , NULL, IPL_BIO, cbufpool_ctor, cbufpool_dtor, sc); |
| 164 | sc->sc_sih_cookie = softint_establish(SOFTINT_BIO, |
| 165 | ld_ataraid_start_vstrategy, sc); |
| 166 | |
| 167 | sc->sc_aai = aai; /* this data persists */ |
| 168 | |
| 169 | ld->sc_maxxfer = MAXPHYS * aai->aai_width; /* XXX */ |
| 170 | ld->sc_secperunit = aai->aai_capacity; |
| 171 | ld->sc_secsize = 512; /* XXX */ |
| 172 | ld->sc_maxqueuecnt = 128; /* XXX */ |
| 173 | ld->sc_dump = ld_ataraid_dump; |
| 174 | |
| 175 | switch (aai->aai_level) { |
| 176 | case AAI_L_SPAN: |
| 177 | level = "SPAN" ; |
| 178 | ld->sc_start = ld_ataraid_start_span; |
| 179 | sc->sc_iodone = ld_ataraid_iodone_raid0; |
| 180 | break; |
| 181 | |
| 182 | case AAI_L_RAID0: |
| 183 | level = "RAID-0" ; |
| 184 | ld->sc_start = ld_ataraid_start_raid0; |
| 185 | sc->sc_iodone = ld_ataraid_iodone_raid0; |
| 186 | break; |
| 187 | |
| 188 | case AAI_L_RAID1: |
| 189 | level = "RAID-1" ; |
| 190 | ld->sc_start = ld_ataraid_start_raid0; |
| 191 | sc->sc_iodone = ld_ataraid_iodone_raid0; |
| 192 | break; |
| 193 | |
| 194 | case AAI_L_RAID0 | AAI_L_RAID1: |
| 195 | level = "RAID-10" ; |
| 196 | ld->sc_start = ld_ataraid_start_raid0; |
| 197 | sc->sc_iodone = ld_ataraid_iodone_raid0; |
| 198 | break; |
| 199 | |
| 200 | default: |
| 201 | snprintf(unklev, sizeof(unklev), "<unknown level 0x%x>" , |
| 202 | aai->aai_level); |
| 203 | level = unklev; |
| 204 | } |
| 205 | |
| 206 | aprint_naive(": ATA %s array\n" , level); |
| 207 | aprint_normal(": %s ATA %s array\n" , |
| 208 | ata_raid_type_name(aai->aai_type), level); |
| 209 | |
| 210 | if (ld->sc_start == NULL) { |
| 211 | aprint_error_dev(ld->sc_dv, "unsupported array type\n" ); |
| 212 | return; |
| 213 | } |
| 214 | |
| 215 | /* |
| 216 | * We get a geometry from the device; use it. |
| 217 | */ |
| 218 | ld->sc_nheads = aai->aai_heads; |
| 219 | ld->sc_nsectors = aai->aai_sectors; |
| 220 | ld->sc_ncylinders = aai->aai_cylinders; |
| 221 | |
| 222 | /* |
| 223 | * Configure all the component disks. |
| 224 | */ |
| 225 | for (i = 0; i < aai->aai_ndisks; i++) { |
| 226 | adi = &aai->aai_disks[i]; |
| 227 | vp = ata_raid_disk_vnode_find(adi); |
| 228 | if (vp == NULL) { |
| 229 | /* |
| 230 | * XXX This is bogus. We should just mark the |
| 231 | * XXX component as FAILED, and write-back new |
| 232 | * XXX config blocks. |
| 233 | */ |
| 234 | break; |
| 235 | } |
| 236 | sc->sc_vnodes[i] = vp; |
| 237 | } |
| 238 | if (i == aai->aai_ndisks) { |
| 239 | ld->sc_flags = LDF_ENABLED; |
| 240 | goto finish; |
| 241 | } |
| 242 | |
| 243 | for (i = 0; i < aai->aai_ndisks; i++) { |
| 244 | vp = sc->sc_vnodes[i]; |
| 245 | sc->sc_vnodes[i] = NULL; |
| 246 | if (vp != NULL) |
| 247 | (void) vn_close(vp, FREAD|FWRITE, NOCRED); |
| 248 | } |
| 249 | |
| 250 | finish: |
| 251 | #if NBIO > 0 |
| 252 | if (bio_register(self, ld_ataraid_bioctl) != 0) |
| 253 | panic("%s: bioctl registration failed\n" , |
| 254 | device_xname(ld->sc_dv)); |
| 255 | #endif |
| 256 | SIMPLEQ_INIT(&sc->sc_cbufq); |
| 257 | ldattach(ld, BUFQ_DISK_DEFAULT_STRAT); |
| 258 | } |
| 259 | |
| 260 | static int |
| 261 | cbufpool_ctor(void *arg, void *obj, int flags) |
| 262 | { |
| 263 | struct ld_ataraid_softc *sc = arg; |
| 264 | struct ld_softc *ld = &sc->sc_ld; |
| 265 | struct cbuf *cbp = obj; |
| 266 | |
| 267 | /* We release/reacquire the spinlock before calling buf_init() */ |
| 268 | mutex_exit(&ld->sc_mutex); |
| 269 | buf_init(&cbp->cb_buf); |
| 270 | mutex_enter(&ld->sc_mutex); |
| 271 | |
| 272 | return 0; |
| 273 | } |
| 274 | |
| 275 | static void |
| 276 | cbufpool_dtor(void *arg, void *obj) |
| 277 | { |
| 278 | struct cbuf *cbp = obj; |
| 279 | |
| 280 | buf_destroy(&cbp->cb_buf); |
| 281 | } |
| 282 | |
| 283 | static struct cbuf * |
| 284 | ld_ataraid_make_cbuf(struct ld_ataraid_softc *sc, struct buf *bp, |
| 285 | u_int comp, daddr_t bn, void *addr, long bcount) |
| 286 | { |
| 287 | struct cbuf *cbp; |
| 288 | |
| 289 | cbp = CBUF_GET(); |
| 290 | if (cbp == NULL) |
| 291 | return NULL; |
| 292 | cbp->cb_buf.b_flags = bp->b_flags; |
| 293 | cbp->cb_buf.b_oflags = bp->b_oflags; |
| 294 | cbp->cb_buf.b_cflags = bp->b_cflags; |
| 295 | cbp->cb_buf.b_iodone = sc->sc_iodone; |
| 296 | cbp->cb_buf.b_proc = bp->b_proc; |
| 297 | cbp->cb_buf.b_vp = sc->sc_vnodes[comp]; |
| 298 | cbp->cb_buf.b_objlock = sc->sc_vnodes[comp]->v_interlock; |
| 299 | cbp->cb_buf.b_blkno = bn + sc->sc_aai->aai_offset; |
| 300 | cbp->cb_buf.b_data = addr; |
| 301 | cbp->cb_buf.b_bcount = bcount; |
| 302 | |
| 303 | /* Context for iodone */ |
| 304 | cbp->cb_obp = bp; |
| 305 | cbp->cb_sc = sc; |
| 306 | cbp->cb_comp = comp; |
| 307 | cbp->cb_other = NULL; |
| 308 | cbp->cb_flags = 0; |
| 309 | |
| 310 | return cbp; |
| 311 | } |
| 312 | |
| 313 | static void |
| 314 | ld_ataraid_start_vstrategy(void *arg) |
| 315 | { |
| 316 | struct ld_ataraid_softc *sc = arg; |
| 317 | struct cbuf *cbp; |
| 318 | |
| 319 | while ((cbp = SIMPLEQ_FIRST(&sc->sc_cbufq)) != NULL) { |
| 320 | SIMPLEQ_REMOVE_HEAD(&sc->sc_cbufq, cb_q); |
| 321 | if ((cbp->cb_buf.b_flags & B_READ) == 0) { |
| 322 | mutex_enter(cbp->cb_buf.b_vp->v_interlock); |
| 323 | cbp->cb_buf.b_vp->v_numoutput++; |
| 324 | mutex_exit(cbp->cb_buf.b_vp->v_interlock); |
| 325 | } |
| 326 | VOP_STRATEGY(cbp->cb_buf.b_vp, &cbp->cb_buf); |
| 327 | } |
| 328 | } |
| 329 | |
| 330 | static int |
| 331 | ld_ataraid_start_span(struct ld_softc *ld, struct buf *bp) |
| 332 | { |
| 333 | struct ld_ataraid_softc *sc = (void *) ld; |
| 334 | struct ataraid_array_info *aai = sc->sc_aai; |
| 335 | struct ataraid_disk_info *adi; |
| 336 | struct cbuf *cbp; |
| 337 | char *addr; |
| 338 | daddr_t bn; |
| 339 | long bcount, rcount; |
| 340 | u_int comp; |
| 341 | |
| 342 | /* Allocate component buffers. */ |
| 343 | addr = bp->b_data; |
| 344 | |
| 345 | /* Find the first component. */ |
| 346 | comp = 0; |
| 347 | adi = &aai->aai_disks[comp]; |
| 348 | bn = bp->b_rawblkno; |
| 349 | while (bn >= adi->adi_compsize) { |
| 350 | bn -= adi->adi_compsize; |
| 351 | adi = &aai->aai_disks[++comp]; |
| 352 | } |
| 353 | |
| 354 | bp->b_resid = bp->b_bcount; |
| 355 | |
| 356 | for (bcount = bp->b_bcount; bcount > 0; bcount -= rcount) { |
| 357 | rcount = bp->b_bcount; |
| 358 | if ((adi->adi_compsize - bn) < btodb(rcount)) |
| 359 | rcount = dbtob(adi->adi_compsize - bn); |
| 360 | |
| 361 | cbp = ld_ataraid_make_cbuf(sc, bp, comp, bn, addr, rcount); |
| 362 | if (cbp == NULL) { |
| 363 | /* Free the already allocated component buffers. */ |
| 364 | while ((cbp = SIMPLEQ_FIRST(&sc->sc_cbufq)) != NULL) { |
| 365 | SIMPLEQ_REMOVE_HEAD(&sc->sc_cbufq, cb_q); |
| 366 | CBUF_PUT(cbp); |
| 367 | } |
| 368 | return EAGAIN; |
| 369 | } |
| 370 | |
| 371 | /* |
| 372 | * For a span, we always know we advance to the next disk, |
| 373 | * and always start at offset 0 on that disk. |
| 374 | */ |
| 375 | adi = &aai->aai_disks[++comp]; |
| 376 | bn = 0; |
| 377 | |
| 378 | SIMPLEQ_INSERT_TAIL(&sc->sc_cbufq, cbp, cb_q); |
| 379 | addr += rcount; |
| 380 | } |
| 381 | |
| 382 | /* Now fire off the requests. */ |
| 383 | softint_schedule(sc->sc_sih_cookie); |
| 384 | |
| 385 | return 0; |
| 386 | } |
| 387 | |
| 388 | static int |
| 389 | ld_ataraid_start_raid0(struct ld_softc *ld, struct buf *bp) |
| 390 | { |
| 391 | struct ld_ataraid_softc *sc = (void *)ld; |
| 392 | struct ataraid_array_info *aai = sc->sc_aai; |
| 393 | struct ataraid_disk_info *adi; |
| 394 | struct cbuf *cbp, *other_cbp; |
| 395 | char *addr; |
| 396 | daddr_t bn, cbn, tbn, off; |
| 397 | long bcount, rcount; |
| 398 | u_int comp; |
| 399 | const int read = bp->b_flags & B_READ; |
| 400 | const int mirror = aai->aai_level & AAI_L_RAID1; |
| 401 | int error = 0; |
| 402 | |
| 403 | /* Allocate component buffers. */ |
| 404 | addr = bp->b_data; |
| 405 | bn = bp->b_rawblkno; |
| 406 | |
| 407 | bp->b_resid = bp->b_bcount; |
| 408 | |
| 409 | for (bcount = bp->b_bcount; bcount > 0; bcount -= rcount) { |
| 410 | tbn = bn / aai->aai_interleave; |
| 411 | off = bn % aai->aai_interleave; |
| 412 | |
| 413 | if (__predict_false(tbn == aai->aai_capacity / |
| 414 | aai->aai_interleave)) { |
| 415 | /* Last stripe. */ |
| 416 | daddr_t sz = (aai->aai_capacity - |
| 417 | (tbn * aai->aai_interleave)) / |
| 418 | aai->aai_width; |
| 419 | comp = off / sz; |
| 420 | cbn = ((tbn / aai->aai_width) * aai->aai_interleave) + |
| 421 | (off % sz); |
| 422 | rcount = min(bcount, dbtob(sz)); |
| 423 | } else { |
| 424 | comp = tbn % aai->aai_width; |
| 425 | cbn = ((tbn / aai->aai_width) * aai->aai_interleave) + |
| 426 | off; |
| 427 | rcount = min(bcount, dbtob(aai->aai_interleave - off)); |
| 428 | } |
| 429 | |
| 430 | /* |
| 431 | * See if a component is valid. |
| 432 | */ |
| 433 | try_mirror: |
| 434 | adi = &aai->aai_disks[comp]; |
| 435 | if ((adi->adi_status & ADI_S_ONLINE) == 0) { |
| 436 | if (mirror && comp < aai->aai_width) { |
| 437 | comp += aai->aai_width; |
| 438 | goto try_mirror; |
| 439 | } |
| 440 | |
| 441 | /* |
| 442 | * No component available. |
| 443 | */ |
| 444 | error = EIO; |
| 445 | goto free_and_exit; |
| 446 | } |
| 447 | |
| 448 | cbp = ld_ataraid_make_cbuf(sc, bp, comp, cbn, addr, rcount); |
| 449 | if (cbp == NULL) { |
| 450 | resource_shortage: |
| 451 | error = EAGAIN; |
| 452 | free_and_exit: |
| 453 | /* Free the already allocated component buffers. */ |
| 454 | while ((cbp = SIMPLEQ_FIRST(&sc->sc_cbufq)) != NULL) { |
| 455 | SIMPLEQ_REMOVE_HEAD(&sc->sc_cbufq, cb_q); |
| 456 | CBUF_PUT(cbp); |
| 457 | } |
| 458 | return error; |
| 459 | } |
| 460 | SIMPLEQ_INSERT_TAIL(&sc->sc_cbufq, cbp, cb_q); |
| 461 | if (mirror && !read && comp < aai->aai_width) { |
| 462 | comp += aai->aai_width; |
| 463 | adi = &aai->aai_disks[comp]; |
| 464 | if (adi->adi_status & ADI_S_ONLINE) { |
| 465 | other_cbp = ld_ataraid_make_cbuf(sc, bp, |
| 466 | comp, cbn, addr, rcount); |
| 467 | if (other_cbp == NULL) |
| 468 | goto resource_shortage; |
| 469 | SIMPLEQ_INSERT_TAIL(&sc->sc_cbufq, |
| 470 | other_cbp, cb_q); |
| 471 | other_cbp->cb_other = cbp; |
| 472 | cbp->cb_other = other_cbp; |
| 473 | } |
| 474 | } |
| 475 | bn += btodb(rcount); |
| 476 | addr += rcount; |
| 477 | } |
| 478 | |
| 479 | /* Now fire off the requests. */ |
| 480 | softint_schedule(sc->sc_sih_cookie); |
| 481 | |
| 482 | return error; |
| 483 | } |
| 484 | |
| 485 | /* |
| 486 | * Called at interrupt time. Mark the component as done and if all |
| 487 | * components are done, take an "interrupt". |
| 488 | */ |
| 489 | static void |
| 490 | ld_ataraid_iodone_raid0(struct buf *vbp) |
| 491 | { |
| 492 | struct cbuf *cbp = (struct cbuf *) vbp, *other_cbp; |
| 493 | struct buf *bp = cbp->cb_obp; |
| 494 | struct ld_ataraid_softc *sc = cbp->cb_sc; |
| 495 | struct ataraid_array_info *aai = sc->sc_aai; |
| 496 | struct ataraid_disk_info *adi; |
| 497 | long count; |
| 498 | int s, iodone; |
| 499 | |
| 500 | s = splbio(); |
| 501 | |
| 502 | iodone = cbp->cb_flags & CBUF_IODONE; |
| 503 | other_cbp = cbp->cb_other; |
| 504 | if (other_cbp != NULL) |
| 505 | /* You are alone */ |
| 506 | other_cbp->cb_other = NULL; |
| 507 | |
| 508 | if (cbp->cb_buf.b_error != 0) { |
| 509 | /* |
| 510 | * Mark this component broken. |
| 511 | */ |
| 512 | adi = &aai->aai_disks[cbp->cb_comp]; |
| 513 | adi->adi_status &= ~ADI_S_ONLINE; |
| 514 | |
| 515 | printf("%s: error %d on component %d (%s)\n" , |
| 516 | device_xname(sc->sc_ld.sc_dv), bp->b_error, cbp->cb_comp, |
| 517 | device_xname(adi->adi_dev)); |
| 518 | |
| 519 | /* |
| 520 | * If we didn't see an error yet and we are reading |
| 521 | * RAID1 disk, try another component. |
| 522 | */ |
| 523 | if (bp->b_error == 0 && |
| 524 | (cbp->cb_buf.b_flags & B_READ) != 0 && |
| 525 | (aai->aai_level & AAI_L_RAID1) != 0 && |
| 526 | cbp->cb_comp < aai->aai_width) { |
| 527 | cbp->cb_comp += aai->aai_width; |
| 528 | adi = &aai->aai_disks[cbp->cb_comp]; |
| 529 | if (adi->adi_status & ADI_S_ONLINE) { |
| 530 | cbp->cb_buf.b_error = 0; |
| 531 | VOP_STRATEGY(cbp->cb_buf.b_vp, &cbp->cb_buf); |
| 532 | goto out; |
| 533 | } |
| 534 | } |
| 535 | |
| 536 | if (iodone || other_cbp != NULL) |
| 537 | /* |
| 538 | * If I/O on other component successfully done |
| 539 | * or the I/O is still in progress, no need |
| 540 | * to tell an error to upper layer. |
| 541 | */ |
| 542 | ; |
| 543 | else { |
| 544 | bp->b_error = cbp->cb_buf.b_error ? |
| 545 | cbp->cb_buf.b_error : EIO; |
| 546 | } |
| 547 | |
| 548 | /* XXX Update component config blocks. */ |
| 549 | |
| 550 | } else { |
| 551 | /* |
| 552 | * If other I/O is still in progress, tell it that |
| 553 | * our I/O is successfully done. |
| 554 | */ |
| 555 | if (other_cbp != NULL) |
| 556 | other_cbp->cb_flags |= CBUF_IODONE; |
| 557 | } |
| 558 | count = cbp->cb_buf.b_bcount; |
| 559 | CBUF_PUT(cbp); |
| 560 | |
| 561 | if (other_cbp != NULL) |
| 562 | goto out; |
| 563 | |
| 564 | /* If all done, "interrupt". */ |
| 565 | bp->b_resid -= count; |
| 566 | if (bp->b_resid < 0) |
| 567 | panic("ld_ataraid_iodone_raid0: count" ); |
| 568 | if (bp->b_resid == 0) |
| 569 | lddone(&sc->sc_ld, bp); |
| 570 | |
| 571 | out: |
| 572 | splx(s); |
| 573 | } |
| 574 | |
| 575 | static int |
| 576 | ld_ataraid_dump(struct ld_softc *sc, void *data, |
| 577 | int blkno, int blkcnt) |
| 578 | { |
| 579 | |
| 580 | return (EIO); |
| 581 | } |
| 582 | |
| 583 | #if NBIO > 0 |
| 584 | static int |
| 585 | ld_ataraid_bioctl(device_t self, u_long cmd, void *addr) |
| 586 | { |
| 587 | struct ld_ataraid_softc *sc = device_private(self); |
| 588 | int error = 0; |
| 589 | |
| 590 | switch (cmd) { |
| 591 | case BIOCINQ: |
| 592 | error = ld_ataraid_bioinq(sc, (struct bioc_inq *)addr); |
| 593 | break; |
| 594 | case BIOCVOL: |
| 595 | error = ld_ataraid_biovol(sc, (struct bioc_vol *)addr); |
| 596 | break; |
| 597 | case BIOCDISK: |
| 598 | error = ld_ataraid_biodisk(sc, (struct bioc_disk *)addr); |
| 599 | break; |
| 600 | default: |
| 601 | error = ENOTTY; |
| 602 | break; |
| 603 | } |
| 604 | |
| 605 | return error; |
| 606 | } |
| 607 | |
| 608 | static int |
| 609 | ld_ataraid_bioinq(struct ld_ataraid_softc *sc, struct bioc_inq *bi) |
| 610 | { |
| 611 | struct ataraid_array_info *aai = sc->sc_aai; |
| 612 | |
| 613 | /* there's always one volume per ld device */ |
| 614 | bi->bi_novol = 1; |
| 615 | bi->bi_nodisk = aai->aai_ndisks; |
| 616 | |
| 617 | return 0; |
| 618 | } |
| 619 | |
| 620 | static int |
| 621 | ld_ataraid_biovol(struct ld_ataraid_softc *sc, struct bioc_vol *bv) |
| 622 | { |
| 623 | struct ataraid_array_info *aai = sc->sc_aai; |
| 624 | struct ld_softc *ld = &sc->sc_ld; |
| 625 | #define to_kibytes(ld,s) (ld->sc_secsize*(s)/1024) |
| 626 | |
| 627 | /* Fill in data for _this_ volume */ |
| 628 | bv->bv_percent = -1; |
| 629 | bv->bv_seconds = 0; |
| 630 | |
| 631 | switch (aai->aai_status) { |
| 632 | case AAI_S_READY: |
| 633 | bv->bv_status = BIOC_SVONLINE; |
| 634 | break; |
| 635 | case AAI_S_DEGRADED: |
| 636 | bv->bv_status = BIOC_SVDEGRADED; |
| 637 | break; |
| 638 | } |
| 639 | |
| 640 | bv->bv_size = ld->sc_secsize * ld->sc_secperunit; |
| 641 | |
| 642 | switch (aai->aai_level) { |
| 643 | case AAI_L_SPAN: |
| 644 | case AAI_L_RAID0: |
| 645 | bv->bv_stripe_size = to_kibytes(ld, aai->aai_interleave); |
| 646 | bv->bv_level = 0; |
| 647 | break; |
| 648 | case AAI_L_RAID1: |
| 649 | bv->bv_stripe_size = 0; |
| 650 | bv->bv_level = 1; |
| 651 | break; |
| 652 | case AAI_L_RAID5: |
| 653 | bv->bv_stripe_size = to_kibytes(ld, aai->aai_interleave); |
| 654 | bv->bv_level = 5; |
| 655 | break; |
| 656 | } |
| 657 | |
| 658 | bv->bv_nodisk = aai->aai_ndisks; |
| 659 | strlcpy(bv->bv_dev, device_xname(ld->sc_dv), sizeof(bv->bv_dev)); |
| 660 | if (aai->aai_name[0] != '\0') |
| 661 | strlcpy(bv->bv_vendor, aai->aai_name, sizeof(bv->bv_vendor)); |
| 662 | |
| 663 | return 0; |
| 664 | } |
| 665 | |
| 666 | static int |
| 667 | ld_ataraid_biodisk(struct ld_ataraid_softc *sc, struct bioc_disk *bd) |
| 668 | { |
| 669 | struct ataraid_array_info *aai = sc->sc_aai; |
| 670 | struct ataraid_disk_info *adi; |
| 671 | struct ld_softc *ld = &sc->sc_ld; |
| 672 | struct atabus_softc *atabus; |
| 673 | struct wd_softc *wd; |
| 674 | char model[81], serial[41], rev[17]; |
| 675 | |
| 676 | /* sanity check */ |
| 677 | if (bd->bd_diskid > aai->aai_ndisks) |
| 678 | return EINVAL; |
| 679 | |
| 680 | adi = &aai->aai_disks[bd->bd_diskid]; |
| 681 | atabus = device_private(device_parent(adi->adi_dev)); |
| 682 | wd = device_private(adi->adi_dev); |
| 683 | |
| 684 | /* fill in data for _this_ disk */ |
| 685 | switch (adi->adi_status) { |
| 686 | case ADI_S_ONLINE | ADI_S_ASSIGNED: |
| 687 | bd->bd_status = BIOC_SDONLINE; |
| 688 | break; |
| 689 | case ADI_S_SPARE: |
| 690 | bd->bd_status = BIOC_SDHOTSPARE; |
| 691 | break; |
| 692 | default: |
| 693 | bd->bd_status = BIOC_SDOFFLINE; |
| 694 | break; |
| 695 | } |
| 696 | |
| 697 | bd->bd_channel = 0; |
| 698 | bd->bd_target = atabus->sc_chan->ch_channel; |
| 699 | bd->bd_lun = 0; |
| 700 | bd->bd_size = (wd->sc_capacity * ld->sc_secsize) - aai->aai_reserved; |
| 701 | |
| 702 | strlcpy(bd->bd_procdev, device_xname(adi->adi_dev), |
| 703 | sizeof(bd->bd_procdev)); |
| 704 | |
| 705 | strnvisx(serial, sizeof(serial), wd->sc_params.atap_serial, |
| 706 | sizeof(wd->sc_params.atap_serial), VIS_TRIM|VIS_SAFE|VIS_OCTAL); |
| 707 | strnvisx(model, sizeof(model), wd->sc_params.atap_model, |
| 708 | sizeof(wd->sc_params.atap_model), VIS_TRIM|VIS_SAFE|VIS_OCTAL); |
| 709 | strnvisx(rev, sizeof(rev), wd->sc_params.atap_revision, |
| 710 | sizeof(wd->sc_params.atap_revision), VIS_TRIM|VIS_SAFE|VIS_OCTAL); |
| 711 | |
| 712 | snprintf(bd->bd_vendor, sizeof(bd->bd_vendor), "%s %s" , model, rev); |
| 713 | strlcpy(bd->bd_serial, serial, sizeof(bd->bd_serial)); |
| 714 | |
| 715 | return 0; |
| 716 | } |
| 717 | #endif /* NBIO > 0 */ |
| 718 | |
| 719 | MODULE(MODULE_CLASS_DRIVER, ld_ataraid, "ld,ataraid" ); |
| 720 | |
| 721 | #ifdef _MODULE |
| 722 | /* |
| 723 | * XXX Don't allow ioconf.c to redefine the "struct cfdriver ld_ataraid" |
| 724 | * XXX it will be defined in the common-code module |
| 725 | */ |
| 726 | #undef CFDRIVER_DECL |
| 727 | #define CFDRIVER_DECL(name, class, attr) |
| 728 | #include "ioconf.c" |
| 729 | #endif |
| 730 | |
| 731 | static int |
| 732 | ld_ataraid_modcmd(modcmd_t cmd, void *opaque) |
| 733 | { |
| 734 | #ifdef _MODULE |
| 735 | /* |
| 736 | * We ignore the cfdriver_vec[] that ioconf provides, since |
| 737 | * the cfdrivers are attached already. |
| 738 | */ |
| 739 | static struct cfdriver * const no_cfdriver_vec[] = { NULL }; |
| 740 | #endif |
| 741 | int error = 0; |
| 742 | |
| 743 | #ifdef _MODULE |
| 744 | switch (cmd) { |
| 745 | case MODULE_CMD_INIT: |
| 746 | error = config_init_component(no_cfdriver_vec, |
| 747 | cfattach_ioconf_ld_ataraid, cfdata_ioconf_ld_ataraid); |
| 748 | break; |
| 749 | case MODULE_CMD_FINI: |
| 750 | error = config_fini_component(no_cfdriver_vec, |
| 751 | cfattach_ioconf_ld_ataraid, cfdata_ioconf_ld_ataraid); |
| 752 | break; |
| 753 | default: |
| 754 | error = ENOTTY; |
| 755 | break; |
| 756 | } |
| 757 | #endif |
| 758 | |
| 759 | return error; |
| 760 | } |
| 761 | |