1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2003, 2008 Silicon Graphics International Corp. 5 * Copyright (c) 2012 The FreeBSD Foundation 6 * Copyright (c) 2014-2017 Alexander Motin <mav@FreeBSD.org> 7 * All rights reserved. 8 * 9 * Portions of this software were developed by Edward Tomasz Napierala 10 * under sponsorship from the FreeBSD Foundation. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions, and the following disclaimer, 17 * without modification. 18 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 19 * substantially similar to the "NO WARRANTY" disclaimer below 20 * ("Disclaimer") and any redistribution must be conditioned upon 21 * including a substantially similar Disclaimer requirement for further 22 * binary redistribution. 23 * 24 * NO WARRANTY 25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 26 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 27 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR 28 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 29 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 33 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 34 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGES. 36 * 37 * $Id: //depot/users/kenm/FreeBSD-test2/sys/cam/ctl/ctl_backend_ramdisk.c#3 $ 38 */ 39 /* 40 * CAM Target Layer black hole and RAM disk backend. 41 * 42 * Author: Ken Merry <ken@FreeBSD.org> 43 */ 44 45 #include <sys/cdefs.h> 46 __FBSDID("$FreeBSD$"); 47 48 #include <sys/param.h> 49 #include <sys/systm.h> 50 #include <sys/kernel.h> 51 #include <sys/condvar.h> 52 #include <sys/types.h> 53 #include <sys/limits.h> 54 #include <sys/lock.h> 55 #include <sys/mutex.h> 56 #include <sys/malloc.h> 57 #include <sys/sx.h> 58 #include <sys/taskqueue.h> 59 #include <sys/time.h> 60 #include <sys/queue.h> 61 #include <sys/conf.h> 62 #include <sys/ioccom.h> 63 #include <sys/module.h> 64 #include <sys/sysctl.h> 65 #include <sys/nv.h> 66 #include <sys/dnv.h> 67 68 #include <cam/scsi/scsi_all.h> 69 #include <cam/scsi/scsi_da.h> 70 #include <cam/ctl/ctl_io.h> 71 #include <cam/ctl/ctl.h> 72 #include <cam/ctl/ctl_util.h> 73 #include <cam/ctl/ctl_backend.h> 74 #include <cam/ctl/ctl_debug.h> 75 #include <cam/ctl/ctl_ioctl.h> 76 #include <cam/ctl/ctl_ha.h> 77 #include <cam/ctl/ctl_private.h> 78 #include <cam/ctl/ctl_error.h> 79 80 #define PRIV(io) \ 81 ((struct ctl_ptr_len_flags *)&(io)->io_hdr.ctl_private[CTL_PRIV_BACKEND]) 82 #define ARGS(io) \ 83 ((struct ctl_lba_len_flags *)&(io)->io_hdr.ctl_private[CTL_PRIV_LBA_LEN]) 84 85 #define PPP (PAGE_SIZE / sizeof(uint8_t **)) 86 #ifdef __LP64__ 87 #define PPPS (PAGE_SHIFT - 3) 88 #else 89 #define PPPS (PAGE_SHIFT - 2) 90 #endif 91 #define SGPP (PAGE_SIZE / sizeof(struct ctl_sg_entry)) 92 93 #define P_UNMAPPED NULL /* Page is unmapped. */ 94 #define P_ANCHORED ((void *)(uintptr_t)1) /* Page is anchored. */ 95 96 typedef enum { 97 GP_READ, /* Return data page or zero page. */ 98 GP_WRITE, /* Return data page, try allocate if none. */ 99 GP_ANCHOR, /* Return data page, try anchor if none. */ 100 GP_OTHER, /* Return what present, do not allocate/anchor. */ 101 } getpage_op_t; 102 103 typedef enum { 104 CTL_BE_RAMDISK_LUN_UNCONFIGURED = 0x01, 105 CTL_BE_RAMDISK_LUN_WAITING = 0x04 106 } ctl_be_ramdisk_lun_flags; 107 108 struct ctl_be_ramdisk_lun { 109 struct ctl_be_lun cbe_lun; /* Must be first element. */ 110 struct ctl_lun_create_params params; 111 int indir; 112 uint8_t **pages; 113 uint8_t *zero_page; 114 struct sx page_lock; 115 u_int pblocksize; 116 u_int pblockmul; 117 uint64_t size_bytes; 118 uint64_t size_blocks; 119 uint64_t cap_bytes; 120 uint64_t cap_used; 121 struct ctl_be_ramdisk_softc *softc; 122 ctl_be_ramdisk_lun_flags flags; 123 SLIST_ENTRY(ctl_be_ramdisk_lun) links; 124 struct taskqueue *io_taskqueue; 125 struct task io_task; 126 STAILQ_HEAD(, ctl_io_hdr) cont_queue; 127 struct mtx_padalign queue_lock; 128 }; 129 130 struct ctl_be_ramdisk_softc { 131 struct sx modify_lock; 132 struct mtx lock; 133 int num_luns; 134 SLIST_HEAD(, ctl_be_ramdisk_lun) lun_list; 135 }; 136 137 static struct ctl_be_ramdisk_softc rd_softc; 138 extern struct ctl_softc *control_softc; 139 140 static int ctl_backend_ramdisk_init(void); 141 static int ctl_backend_ramdisk_shutdown(void); 142 static int ctl_backend_ramdisk_move_done(union ctl_io *io, bool samethr); 143 static void ctl_backend_ramdisk_compare(union ctl_io *io); 144 static void ctl_backend_ramdisk_rw(union ctl_io *io); 145 static int ctl_backend_ramdisk_submit(union ctl_io *io); 146 static void ctl_backend_ramdisk_worker(void *context, int pending); 147 static int ctl_backend_ramdisk_config_read(union ctl_io *io); 148 static int ctl_backend_ramdisk_config_write(union ctl_io *io); 149 static uint64_t ctl_backend_ramdisk_lun_attr(struct ctl_be_lun *cbe_lun, const char *attrname); 150 static int ctl_backend_ramdisk_ioctl(struct cdev *dev, u_long cmd, 151 caddr_t addr, int flag, struct thread *td); 152 static int ctl_backend_ramdisk_rm(struct ctl_be_ramdisk_softc *softc, 153 struct ctl_lun_req *req); 154 static int ctl_backend_ramdisk_create(struct ctl_be_ramdisk_softc *softc, 155 struct ctl_lun_req *req); 156 static int ctl_backend_ramdisk_modify(struct ctl_be_ramdisk_softc *softc, 157 struct ctl_lun_req *req); 158 static void ctl_backend_ramdisk_lun_shutdown(struct ctl_be_lun *cbe_lun); 159 160 static struct ctl_backend_driver ctl_be_ramdisk_driver = 161 { 162 .name = "ramdisk", 163 .flags = CTL_BE_FLAG_HAS_CONFIG, 164 .init = ctl_backend_ramdisk_init, 165 .shutdown = ctl_backend_ramdisk_shutdown, 166 .data_submit = ctl_backend_ramdisk_submit, 167 .config_read = ctl_backend_ramdisk_config_read, 168 .config_write = ctl_backend_ramdisk_config_write, 169 .ioctl = ctl_backend_ramdisk_ioctl, 170 .lun_attr = ctl_backend_ramdisk_lun_attr, 171 }; 172 173 MALLOC_DEFINE(M_RAMDISK, "ctlramdisk", "Memory used for CTL RAMdisk"); 174 CTL_BACKEND_DECLARE(cbr, ctl_be_ramdisk_driver); 175 176 static int 177 ctl_backend_ramdisk_init(void) 178 { 179 struct ctl_be_ramdisk_softc *softc = &rd_softc; 180 181 memset(softc, 0, sizeof(*softc)); 182 sx_init(&softc->modify_lock, "ctlrammod"); 183 mtx_init(&softc->lock, "ctlram", NULL, MTX_DEF); 184 SLIST_INIT(&softc->lun_list); 185 return (0); 186 } 187 188 static int 189 ctl_backend_ramdisk_shutdown(void) 190 { 191 struct ctl_be_ramdisk_softc *softc = &rd_softc; 192 struct ctl_be_ramdisk_lun *lun; 193 194 mtx_lock(&softc->lock); 195 while ((lun = SLIST_FIRST(&softc->lun_list)) != NULL) { 196 SLIST_REMOVE_HEAD(&softc->lun_list, links); 197 softc->num_luns--; 198 /* 199 * Drop our lock here. Since ctl_remove_lun() can call 200 * back into us, this could potentially lead to a recursive 201 * lock of the same mutex, which would cause a hang. 202 */ 203 mtx_unlock(&softc->lock); 204 ctl_remove_lun(&lun->cbe_lun); 205 mtx_lock(&softc->lock); 206 } 207 mtx_unlock(&softc->lock); 208 mtx_destroy(&softc->lock); 209 sx_destroy(&softc->modify_lock); 210 return (0); 211 } 212 213 static uint8_t * 214 ctl_backend_ramdisk_getpage(struct ctl_be_ramdisk_lun *be_lun, off_t pn, 215 getpage_op_t op) 216 { 217 uint8_t **p, ***pp; 218 off_t i; 219 int s; 220 221 if (be_lun->cap_bytes == 0) { 222 switch (op) { 223 case GP_READ: 224 return (be_lun->zero_page); 225 case GP_WRITE: 226 return ((uint8_t *)be_lun->pages); 227 case GP_ANCHOR: 228 return (P_ANCHORED); 229 default: 230 return (P_UNMAPPED); 231 } 232 } 233 if (op == GP_WRITE || op == GP_ANCHOR) { 234 sx_xlock(&be_lun->page_lock); 235 pp = &be_lun->pages; 236 for (s = (be_lun->indir - 1) * PPPS; s >= 0; s -= PPPS) { 237 if (*pp == NULL) { 238 *pp = malloc(PAGE_SIZE, M_RAMDISK, 239 M_WAITOK|M_ZERO); 240 } 241 i = pn >> s; 242 pp = (uint8_t ***)&(*pp)[i]; 243 pn -= i << s; 244 } 245 if (*pp == P_UNMAPPED && be_lun->cap_used < be_lun->cap_bytes) { 246 if (op == GP_WRITE) { 247 *pp = malloc(be_lun->pblocksize, M_RAMDISK, 248 M_WAITOK|M_ZERO); 249 } else 250 *pp = P_ANCHORED; 251 be_lun->cap_used += be_lun->pblocksize; 252 } else if (*pp == P_ANCHORED && op == GP_WRITE) { 253 *pp = malloc(be_lun->pblocksize, M_RAMDISK, 254 M_WAITOK|M_ZERO); 255 } 256 sx_xunlock(&be_lun->page_lock); 257 return ((uint8_t *)*pp); 258 } else { 259 sx_slock(&be_lun->page_lock); 260 p = be_lun->pages; 261 for (s = (be_lun->indir - 1) * PPPS; s >= 0; s -= PPPS) { 262 if (p == NULL) 263 break; 264 i = pn >> s; 265 p = (uint8_t **)p[i]; 266 pn -= i << s; 267 } 268 sx_sunlock(&be_lun->page_lock); 269 if ((p == P_UNMAPPED || p == P_ANCHORED) && op == GP_READ) 270 return (be_lun->zero_page); 271 return ((uint8_t *)p); 272 } 273 }; 274 275 static void 276 ctl_backend_ramdisk_unmappage(struct ctl_be_ramdisk_lun *be_lun, off_t pn) 277 { 278 uint8_t ***pp; 279 off_t i; 280 int s; 281 282 if (be_lun->cap_bytes == 0) 283 return; 284 sx_xlock(&be_lun->page_lock); 285 pp = &be_lun->pages; 286 for (s = (be_lun->indir - 1) * PPPS; s >= 0; s -= PPPS) { 287 if (*pp == NULL) 288 goto noindir; 289 i = pn >> s; 290 pp = (uint8_t ***)&(*pp)[i]; 291 pn -= i << s; 292 } 293 if (*pp == P_ANCHORED) { 294 be_lun->cap_used -= be_lun->pblocksize; 295 *pp = P_UNMAPPED; 296 } else if (*pp != P_UNMAPPED) { 297 free(*pp, M_RAMDISK); 298 be_lun->cap_used -= be_lun->pblocksize; 299 *pp = P_UNMAPPED; 300 } 301 noindir: 302 sx_xunlock(&be_lun->page_lock); 303 }; 304 305 static void 306 ctl_backend_ramdisk_anchorpage(struct ctl_be_ramdisk_lun *be_lun, off_t pn) 307 { 308 uint8_t ***pp; 309 off_t i; 310 int s; 311 312 if (be_lun->cap_bytes == 0) 313 return; 314 sx_xlock(&be_lun->page_lock); 315 pp = &be_lun->pages; 316 for (s = (be_lun->indir - 1) * PPPS; s >= 0; s -= PPPS) { 317 if (*pp == NULL) 318 goto noindir; 319 i = pn >> s; 320 pp = (uint8_t ***)&(*pp)[i]; 321 pn -= i << s; 322 } 323 if (*pp == P_UNMAPPED && be_lun->cap_used < be_lun->cap_bytes) { 324 be_lun->cap_used += be_lun->pblocksize; 325 *pp = P_ANCHORED; 326 } else if (*pp != P_ANCHORED) { 327 free(*pp, M_RAMDISK); 328 *pp = P_ANCHORED; 329 } 330 noindir: 331 sx_xunlock(&be_lun->page_lock); 332 }; 333 334 static void 335 ctl_backend_ramdisk_freeallpages(uint8_t **p, int indir) 336 { 337 int i; 338 339 if (p == NULL) 340 return; 341 if (indir == 0) { 342 free(p, M_RAMDISK); 343 return; 344 } 345 for (i = 0; i < PPP; i++) { 346 if (p[i] == NULL) 347 continue; 348 ctl_backend_ramdisk_freeallpages((uint8_t **)p[i], indir - 1); 349 } 350 free(p, M_RAMDISK); 351 }; 352 353 static size_t 354 cmp(uint8_t *a, uint8_t *b, size_t size) 355 { 356 size_t i; 357 358 for (i = 0; i < size; i++) { 359 if (a[i] != b[i]) 360 break; 361 } 362 return (i); 363 } 364 365 static int 366 ctl_backend_ramdisk_cmp(union ctl_io *io) 367 { 368 struct ctl_be_lun *cbe_lun = CTL_BACKEND_LUN(io); 369 struct ctl_be_ramdisk_lun *be_lun = (struct ctl_be_ramdisk_lun *)cbe_lun; 370 uint8_t *page; 371 uint8_t info[8]; 372 uint64_t lba; 373 u_int lbaoff, lbas, res, off; 374 375 lbas = io->scsiio.kern_data_len / cbe_lun->blocksize; 376 lba = ARGS(io)->lba + PRIV(io)->len - lbas; 377 off = 0; 378 for (; lbas > 0; lbas--, lba++) { 379 page = ctl_backend_ramdisk_getpage(be_lun, 380 lba >> cbe_lun->pblockexp, GP_READ); 381 lbaoff = lba & ~(UINT_MAX << cbe_lun->pblockexp); 382 page += lbaoff * cbe_lun->blocksize; 383 res = cmp(io->scsiio.kern_data_ptr + off, page, 384 cbe_lun->blocksize); 385 off += res; 386 if (res < cbe_lun->blocksize) 387 break; 388 } 389 if (lbas > 0) { 390 off += io->scsiio.kern_rel_offset - io->scsiio.kern_data_len; 391 scsi_u64to8b(off, info); 392 ctl_set_sense(&io->scsiio, /*current_error*/ 1, 393 /*sense_key*/ SSD_KEY_MISCOMPARE, 394 /*asc*/ 0x1D, /*ascq*/ 0x00, 395 /*type*/ SSD_ELEM_INFO, 396 /*size*/ sizeof(info), /*data*/ &info, 397 /*type*/ SSD_ELEM_NONE); 398 return (1); 399 } 400 return (0); 401 } 402 403 static int 404 ctl_backend_ramdisk_move_done(union ctl_io *io, bool samethr) 405 { 406 struct ctl_be_ramdisk_lun *be_lun = 407 (struct ctl_be_ramdisk_lun *)CTL_BACKEND_LUN(io); 408 409 CTL_DEBUG_PRINT(("ctl_backend_ramdisk_move_done\n")); 410 if (io->scsiio.kern_sg_entries > 0) 411 free(io->scsiio.kern_data_ptr, M_RAMDISK); 412 io->scsiio.kern_rel_offset += io->scsiio.kern_data_len; 413 if ((io->io_hdr.flags & CTL_FLAG_ABORT) == 0 && 414 (io->io_hdr.status & CTL_STATUS_MASK) == CTL_STATUS_NONE) { 415 if (ARGS(io)->flags & CTL_LLF_COMPARE) { 416 /* We have data block ready for comparison. */ 417 if (ctl_backend_ramdisk_cmp(io)) 418 goto done; 419 } 420 if (ARGS(io)->len > PRIV(io)->len) { 421 mtx_lock(&be_lun->queue_lock); 422 STAILQ_INSERT_TAIL(&be_lun->cont_queue, 423 &io->io_hdr, links); 424 mtx_unlock(&be_lun->queue_lock); 425 taskqueue_enqueue(be_lun->io_taskqueue, 426 &be_lun->io_task); 427 return (0); 428 } 429 ctl_set_success(&io->scsiio); 430 } 431 done: 432 ctl_data_submit_done(io); 433 return(0); 434 } 435 436 static void 437 ctl_backend_ramdisk_compare(union ctl_io *io) 438 { 439 struct ctl_be_lun *cbe_lun = CTL_BACKEND_LUN(io); 440 u_int lbas, len; 441 442 lbas = ARGS(io)->len - PRIV(io)->len; 443 lbas = MIN(lbas, 131072 / cbe_lun->blocksize); 444 len = lbas * cbe_lun->blocksize; 445 446 io->scsiio.be_move_done = ctl_backend_ramdisk_move_done; 447 io->scsiio.kern_data_ptr = malloc(len, M_RAMDISK, M_WAITOK); 448 io->scsiio.kern_data_len = len; 449 io->scsiio.kern_sg_entries = 0; 450 io->io_hdr.flags |= CTL_FLAG_ALLOCATED; 451 PRIV(io)->len += lbas; 452 ctl_datamove(io); 453 } 454 455 static void 456 ctl_backend_ramdisk_rw(union ctl_io *io) 457 { 458 struct ctl_be_lun *cbe_lun = CTL_BACKEND_LUN(io); 459 struct ctl_be_ramdisk_lun *be_lun = (struct ctl_be_ramdisk_lun *)cbe_lun; 460 struct ctl_sg_entry *sg_entries; 461 uint8_t *page; 462 uint64_t lba; 463 u_int i, len, lbaoff, lbas, sgs, off; 464 getpage_op_t op; 465 466 lba = ARGS(io)->lba + PRIV(io)->len; 467 lbaoff = lba & ~(UINT_MAX << cbe_lun->pblockexp); 468 lbas = ARGS(io)->len - PRIV(io)->len; 469 lbas = MIN(lbas, (SGPP << cbe_lun->pblockexp) - lbaoff); 470 sgs = (lbas + lbaoff + be_lun->pblockmul - 1) >> cbe_lun->pblockexp; 471 off = lbaoff * cbe_lun->blocksize; 472 op = (ARGS(io)->flags & CTL_LLF_WRITE) ? GP_WRITE : GP_READ; 473 if (sgs > 1) { 474 io->scsiio.kern_data_ptr = malloc(sizeof(struct ctl_sg_entry) * 475 sgs, M_RAMDISK, M_WAITOK); 476 sg_entries = (struct ctl_sg_entry *)io->scsiio.kern_data_ptr; 477 len = lbas * cbe_lun->blocksize; 478 for (i = 0; i < sgs; i++) { 479 page = ctl_backend_ramdisk_getpage(be_lun, 480 (lba >> cbe_lun->pblockexp) + i, op); 481 if (page == P_UNMAPPED || page == P_ANCHORED) { 482 free(io->scsiio.kern_data_ptr, M_RAMDISK); 483 nospc: 484 ctl_set_space_alloc_fail(&io->scsiio); 485 ctl_data_submit_done(io); 486 return; 487 } 488 sg_entries[i].addr = page + off; 489 sg_entries[i].len = MIN(len, be_lun->pblocksize - off); 490 len -= sg_entries[i].len; 491 off = 0; 492 } 493 } else { 494 page = ctl_backend_ramdisk_getpage(be_lun, 495 lba >> cbe_lun->pblockexp, op); 496 if (page == P_UNMAPPED || page == P_ANCHORED) 497 goto nospc; 498 sgs = 0; 499 io->scsiio.kern_data_ptr = page + off; 500 } 501 502 io->scsiio.be_move_done = ctl_backend_ramdisk_move_done; 503 io->scsiio.kern_data_len = lbas * cbe_lun->blocksize; 504 io->scsiio.kern_sg_entries = sgs; 505 io->io_hdr.flags |= CTL_FLAG_ALLOCATED; 506 PRIV(io)->len += lbas; 507 if ((ARGS(io)->flags & CTL_LLF_READ) && 508 ARGS(io)->len <= PRIV(io)->len) { 509 ctl_set_success(&io->scsiio); 510 ctl_serseq_done(io); 511 } 512 ctl_datamove(io); 513 } 514 515 static int 516 ctl_backend_ramdisk_submit(union ctl_io *io) 517 { 518 struct ctl_lba_len_flags *lbalen = ARGS(io); 519 520 if (lbalen->flags & CTL_LLF_VERIFY) { 521 ctl_set_success(&io->scsiio); 522 ctl_data_submit_done(io); 523 return (CTL_RETVAL_COMPLETE); 524 } 525 PRIV(io)->len = 0; 526 if (lbalen->flags & CTL_LLF_COMPARE) 527 ctl_backend_ramdisk_compare(io); 528 else 529 ctl_backend_ramdisk_rw(io); 530 return (CTL_RETVAL_COMPLETE); 531 } 532 533 static void 534 ctl_backend_ramdisk_worker(void *context, int pending) 535 { 536 struct ctl_be_ramdisk_lun *be_lun; 537 union ctl_io *io; 538 539 be_lun = (struct ctl_be_ramdisk_lun *)context; 540 mtx_lock(&be_lun->queue_lock); 541 for (;;) { 542 io = (union ctl_io *)STAILQ_FIRST(&be_lun->cont_queue); 543 if (io != NULL) { 544 STAILQ_REMOVE_HEAD(&be_lun->cont_queue, links); 545 mtx_unlock(&be_lun->queue_lock); 546 if (ARGS(io)->flags & CTL_LLF_COMPARE) 547 ctl_backend_ramdisk_compare(io); 548 else 549 ctl_backend_ramdisk_rw(io); 550 mtx_lock(&be_lun->queue_lock); 551 continue; 552 } 553 554 /* 555 * If we get here, there is no work left in the queues, so 556 * just break out and let the task queue go to sleep. 557 */ 558 break; 559 } 560 mtx_unlock(&be_lun->queue_lock); 561 } 562 563 static int 564 ctl_backend_ramdisk_gls(union ctl_io *io) 565 { 566 struct ctl_be_lun *cbe_lun = CTL_BACKEND_LUN(io); 567 struct ctl_be_ramdisk_lun *be_lun = (struct ctl_be_ramdisk_lun *)cbe_lun; 568 struct scsi_get_lba_status_data *data; 569 uint8_t *page; 570 u_int lbaoff; 571 572 data = (struct scsi_get_lba_status_data *)io->scsiio.kern_data_ptr; 573 scsi_u64to8b(ARGS(io)->lba, data->descr[0].addr); 574 lbaoff = ARGS(io)->lba & ~(UINT_MAX << cbe_lun->pblockexp); 575 scsi_ulto4b(be_lun->pblockmul - lbaoff, data->descr[0].length); 576 page = ctl_backend_ramdisk_getpage(be_lun, 577 ARGS(io)->lba >> cbe_lun->pblockexp, GP_OTHER); 578 if (page == P_UNMAPPED) 579 data->descr[0].status = 1; 580 else if (page == P_ANCHORED) 581 data->descr[0].status = 2; 582 else 583 data->descr[0].status = 0; 584 ctl_config_read_done(io); 585 return (CTL_RETVAL_COMPLETE); 586 } 587 588 static int 589 ctl_backend_ramdisk_config_read(union ctl_io *io) 590 { 591 int retval = 0; 592 593 switch (io->scsiio.cdb[0]) { 594 case SERVICE_ACTION_IN: 595 if (io->scsiio.cdb[1] == SGLS_SERVICE_ACTION) { 596 retval = ctl_backend_ramdisk_gls(io); 597 break; 598 } 599 ctl_set_invalid_field(&io->scsiio, 600 /*sks_valid*/ 1, 601 /*command*/ 1, 602 /*field*/ 1, 603 /*bit_valid*/ 1, 604 /*bit*/ 4); 605 ctl_config_read_done(io); 606 retval = CTL_RETVAL_COMPLETE; 607 break; 608 default: 609 ctl_set_invalid_opcode(&io->scsiio); 610 ctl_config_read_done(io); 611 retval = CTL_RETVAL_COMPLETE; 612 break; 613 } 614 return (retval); 615 } 616 617 static void 618 ctl_backend_ramdisk_delete(struct ctl_be_lun *cbe_lun, off_t lba, off_t len, 619 int anchor) 620 { 621 struct ctl_be_ramdisk_lun *be_lun = (struct ctl_be_ramdisk_lun *)cbe_lun; 622 uint8_t *page; 623 uint64_t p, lp; 624 u_int lbaoff; 625 getpage_op_t op = anchor ? GP_ANCHOR : GP_OTHER; 626 627 /* Partially zero first partial page. */ 628 p = lba >> cbe_lun->pblockexp; 629 lbaoff = lba & ~(UINT_MAX << cbe_lun->pblockexp); 630 if (lbaoff != 0) { 631 page = ctl_backend_ramdisk_getpage(be_lun, p, op); 632 if (page != P_UNMAPPED && page != P_ANCHORED) { 633 memset(page + lbaoff * cbe_lun->blocksize, 0, 634 min(len, be_lun->pblockmul - lbaoff) * 635 cbe_lun->blocksize); 636 } 637 p++; 638 } 639 640 /* Partially zero last partial page. */ 641 lp = (lba + len) >> cbe_lun->pblockexp; 642 lbaoff = (lba + len) & ~(UINT_MAX << cbe_lun->pblockexp); 643 if (p <= lp && lbaoff != 0) { 644 page = ctl_backend_ramdisk_getpage(be_lun, lp, op); 645 if (page != P_UNMAPPED && page != P_ANCHORED) 646 memset(page, 0, lbaoff * cbe_lun->blocksize); 647 } 648 649 /* Delete remaining full pages. */ 650 if (anchor) { 651 for (; p < lp; p++) 652 ctl_backend_ramdisk_anchorpage(be_lun, p); 653 } else { 654 for (; p < lp; p++) 655 ctl_backend_ramdisk_unmappage(be_lun, p); 656 } 657 } 658 659 static void 660 ctl_backend_ramdisk_ws(union ctl_io *io) 661 { 662 struct ctl_be_lun *cbe_lun = CTL_BACKEND_LUN(io); 663 struct ctl_be_ramdisk_lun *be_lun = (struct ctl_be_ramdisk_lun *)cbe_lun; 664 struct ctl_lba_len_flags *lbalen = ARGS(io); 665 uint8_t *page; 666 uint64_t lba; 667 u_int lbaoff, lbas; 668 669 if (lbalen->flags & ~(SWS_LBDATA | SWS_UNMAP | SWS_ANCHOR | SWS_NDOB)) { 670 ctl_set_invalid_field(&io->scsiio, 671 /*sks_valid*/ 1, 672 /*command*/ 1, 673 /*field*/ 1, 674 /*bit_valid*/ 0, 675 /*bit*/ 0); 676 ctl_config_write_done(io); 677 return; 678 } 679 if (lbalen->flags & SWS_UNMAP) { 680 ctl_backend_ramdisk_delete(cbe_lun, lbalen->lba, lbalen->len, 681 (lbalen->flags & SWS_ANCHOR) != 0); 682 ctl_set_success(&io->scsiio); 683 ctl_config_write_done(io); 684 return; 685 } 686 687 for (lba = lbalen->lba, lbas = lbalen->len; lbas > 0; lba++, lbas--) { 688 page = ctl_backend_ramdisk_getpage(be_lun, 689 lba >> cbe_lun->pblockexp, GP_WRITE); 690 if (page == P_UNMAPPED || page == P_ANCHORED) { 691 ctl_set_space_alloc_fail(&io->scsiio); 692 ctl_data_submit_done(io); 693 return; 694 } 695 lbaoff = lba & ~(UINT_MAX << cbe_lun->pblockexp); 696 page += lbaoff * cbe_lun->blocksize; 697 if (lbalen->flags & SWS_NDOB) { 698 memset(page, 0, cbe_lun->blocksize); 699 } else { 700 memcpy(page, io->scsiio.kern_data_ptr, 701 cbe_lun->blocksize); 702 } 703 if (lbalen->flags & SWS_LBDATA) 704 scsi_ulto4b(lba, page); 705 } 706 ctl_set_success(&io->scsiio); 707 ctl_config_write_done(io); 708 } 709 710 static void 711 ctl_backend_ramdisk_unmap(union ctl_io *io) 712 { 713 struct ctl_be_lun *cbe_lun = CTL_BACKEND_LUN(io); 714 struct ctl_ptr_len_flags *ptrlen = (struct ctl_ptr_len_flags *)ARGS(io); 715 struct scsi_unmap_desc *buf, *end; 716 717 if ((ptrlen->flags & ~SU_ANCHOR) != 0) { 718 ctl_set_invalid_field(&io->scsiio, 719 /*sks_valid*/ 0, 720 /*command*/ 0, 721 /*field*/ 0, 722 /*bit_valid*/ 0, 723 /*bit*/ 0); 724 ctl_config_write_done(io); 725 return; 726 } 727 728 buf = (struct scsi_unmap_desc *)ptrlen->ptr; 729 end = buf + ptrlen->len / sizeof(*buf); 730 for (; buf < end; buf++) { 731 ctl_backend_ramdisk_delete(cbe_lun, 732 scsi_8btou64(buf->lba), scsi_4btoul(buf->length), 733 (ptrlen->flags & SU_ANCHOR) != 0); 734 } 735 736 ctl_set_success(&io->scsiio); 737 ctl_config_write_done(io); 738 } 739 740 static int 741 ctl_backend_ramdisk_config_write(union ctl_io *io) 742 { 743 struct ctl_be_lun *cbe_lun = CTL_BACKEND_LUN(io); 744 int retval = 0; 745 746 switch (io->scsiio.cdb[0]) { 747 case SYNCHRONIZE_CACHE: 748 case SYNCHRONIZE_CACHE_16: 749 /* We have no cache to flush. */ 750 ctl_set_success(&io->scsiio); 751 ctl_config_write_done(io); 752 break; 753 case START_STOP_UNIT: { 754 struct scsi_start_stop_unit *cdb; 755 756 cdb = (struct scsi_start_stop_unit *)io->scsiio.cdb; 757 if ((cdb->how & SSS_PC_MASK) != 0) { 758 ctl_set_success(&io->scsiio); 759 ctl_config_write_done(io); 760 break; 761 } 762 if (cdb->how & SSS_START) { 763 if (cdb->how & SSS_LOEJ) 764 ctl_lun_has_media(cbe_lun); 765 ctl_start_lun(cbe_lun); 766 } else { 767 ctl_stop_lun(cbe_lun); 768 if (cdb->how & SSS_LOEJ) 769 ctl_lun_ejected(cbe_lun); 770 } 771 ctl_set_success(&io->scsiio); 772 ctl_config_write_done(io); 773 break; 774 } 775 case PREVENT_ALLOW: 776 ctl_set_success(&io->scsiio); 777 ctl_config_write_done(io); 778 break; 779 case WRITE_SAME_10: 780 case WRITE_SAME_16: 781 ctl_backend_ramdisk_ws(io); 782 break; 783 case UNMAP: 784 ctl_backend_ramdisk_unmap(io); 785 break; 786 default: 787 ctl_set_invalid_opcode(&io->scsiio); 788 ctl_config_write_done(io); 789 retval = CTL_RETVAL_COMPLETE; 790 break; 791 } 792 793 return (retval); 794 } 795 796 static uint64_t 797 ctl_backend_ramdisk_lun_attr(struct ctl_be_lun *cbe_lun, const char *attrname) 798 { 799 struct ctl_be_ramdisk_lun *be_lun = (struct ctl_be_ramdisk_lun *)cbe_lun; 800 uint64_t val; 801 802 val = UINT64_MAX; 803 if (be_lun->cap_bytes == 0) 804 return (val); 805 sx_slock(&be_lun->page_lock); 806 if (strcmp(attrname, "blocksused") == 0) { 807 val = be_lun->cap_used / be_lun->cbe_lun.blocksize; 808 } else if (strcmp(attrname, "blocksavail") == 0) { 809 val = (be_lun->cap_bytes - be_lun->cap_used) / 810 be_lun->cbe_lun.blocksize; 811 } 812 sx_sunlock(&be_lun->page_lock); 813 return (val); 814 } 815 816 static int 817 ctl_backend_ramdisk_ioctl(struct cdev *dev, u_long cmd, caddr_t addr, 818 int flag, struct thread *td) 819 { 820 struct ctl_be_ramdisk_softc *softc = &rd_softc; 821 struct ctl_lun_req *lun_req; 822 int retval; 823 824 retval = 0; 825 switch (cmd) { 826 case CTL_LUN_REQ: 827 lun_req = (struct ctl_lun_req *)addr; 828 switch (lun_req->reqtype) { 829 case CTL_LUNREQ_CREATE: 830 retval = ctl_backend_ramdisk_create(softc, lun_req); 831 break; 832 case CTL_LUNREQ_RM: 833 retval = ctl_backend_ramdisk_rm(softc, lun_req); 834 break; 835 case CTL_LUNREQ_MODIFY: 836 retval = ctl_backend_ramdisk_modify(softc, lun_req); 837 break; 838 default: 839 lun_req->status = CTL_LUN_ERROR; 840 snprintf(lun_req->error_str, sizeof(lun_req->error_str), 841 "%s: invalid LUN request type %d", __func__, 842 lun_req->reqtype); 843 break; 844 } 845 break; 846 default: 847 retval = ENOTTY; 848 break; 849 } 850 851 return (retval); 852 } 853 854 static int 855 ctl_backend_ramdisk_rm(struct ctl_be_ramdisk_softc *softc, 856 struct ctl_lun_req *req) 857 { 858 struct ctl_be_ramdisk_lun *be_lun; 859 struct ctl_lun_rm_params *params; 860 int retval; 861 862 params = &req->reqdata.rm; 863 sx_xlock(&softc->modify_lock); 864 mtx_lock(&softc->lock); 865 SLIST_FOREACH(be_lun, &softc->lun_list, links) { 866 if (be_lun->cbe_lun.lun_id == params->lun_id) { 867 SLIST_REMOVE(&softc->lun_list, be_lun, 868 ctl_be_ramdisk_lun, links); 869 softc->num_luns--; 870 break; 871 } 872 } 873 mtx_unlock(&softc->lock); 874 sx_xunlock(&softc->modify_lock); 875 if (be_lun == NULL) { 876 snprintf(req->error_str, sizeof(req->error_str), 877 "%s: LUN %u is not managed by the ramdisk backend", 878 __func__, params->lun_id); 879 goto bailout_error; 880 } 881 882 /* 883 * Set the waiting flag before we invalidate the LUN. Our shutdown 884 * routine can be called any time after we invalidate the LUN, 885 * and can be called from our context. 886 * 887 * This tells the shutdown routine that we're waiting, or we're 888 * going to wait for the shutdown to happen. 889 */ 890 mtx_lock(&softc->lock); 891 be_lun->flags |= CTL_BE_RAMDISK_LUN_WAITING; 892 mtx_unlock(&softc->lock); 893 894 retval = ctl_remove_lun(&be_lun->cbe_lun); 895 if (retval != 0) { 896 snprintf(req->error_str, sizeof(req->error_str), 897 "%s: error %d returned from ctl_remove_lun() for " 898 "LUN %d", __func__, retval, params->lun_id); 899 mtx_lock(&softc->lock); 900 be_lun->flags &= ~CTL_BE_RAMDISK_LUN_WAITING; 901 mtx_unlock(&softc->lock); 902 goto bailout_error; 903 } 904 905 mtx_lock(&softc->lock); 906 while ((be_lun->flags & CTL_BE_RAMDISK_LUN_UNCONFIGURED) == 0) { 907 retval = msleep(be_lun, &softc->lock, PCATCH, "ctlramrm", 0); 908 if (retval == EINTR) 909 break; 910 } 911 be_lun->flags &= ~CTL_BE_RAMDISK_LUN_WAITING; 912 if (be_lun->flags & CTL_BE_RAMDISK_LUN_UNCONFIGURED) { 913 mtx_unlock(&softc->lock); 914 free(be_lun, M_RAMDISK); 915 } else { 916 mtx_unlock(&softc->lock); 917 return (EINTR); 918 } 919 920 req->status = CTL_LUN_OK; 921 return (retval); 922 923 bailout_error: 924 req->status = CTL_LUN_ERROR; 925 return (0); 926 } 927 928 static int 929 ctl_backend_ramdisk_create(struct ctl_be_ramdisk_softc *softc, 930 struct ctl_lun_req *req) 931 { 932 struct ctl_be_ramdisk_lun *be_lun; 933 struct ctl_be_lun *cbe_lun; 934 struct ctl_lun_create_params *params; 935 const char *value; 936 char tmpstr[32]; 937 uint64_t t; 938 int retval; 939 940 retval = 0; 941 params = &req->reqdata.create; 942 943 be_lun = malloc(sizeof(*be_lun), M_RAMDISK, M_ZERO | M_WAITOK); 944 cbe_lun = &be_lun->cbe_lun; 945 cbe_lun->options = nvlist_clone(req->args_nvl); 946 be_lun->params = req->reqdata.create; 947 be_lun->softc = softc; 948 949 if (params->flags & CTL_LUN_FLAG_DEV_TYPE) 950 cbe_lun->lun_type = params->device_type; 951 else 952 cbe_lun->lun_type = T_DIRECT; 953 be_lun->flags = 0; 954 cbe_lun->flags = 0; 955 value = dnvlist_get_string(cbe_lun->options, "ha_role", NULL); 956 if (value != NULL) { 957 if (strcmp(value, "primary") == 0) 958 cbe_lun->flags |= CTL_LUN_FLAG_PRIMARY; 959 } else if (control_softc->flags & CTL_FLAG_ACTIVE_SHELF) 960 cbe_lun->flags |= CTL_LUN_FLAG_PRIMARY; 961 962 be_lun->pblocksize = PAGE_SIZE; 963 value = dnvlist_get_string(cbe_lun->options, "pblocksize", NULL); 964 if (value != NULL) { 965 ctl_expand_number(value, &t); 966 be_lun->pblocksize = t; 967 } 968 if (be_lun->pblocksize < 512 || be_lun->pblocksize > 131072) { 969 snprintf(req->error_str, sizeof(req->error_str), 970 "%s: unsupported pblocksize %u", __func__, 971 be_lun->pblocksize); 972 goto bailout_error; 973 } 974 975 if (cbe_lun->lun_type == T_DIRECT || 976 cbe_lun->lun_type == T_CDROM) { 977 if (params->blocksize_bytes != 0) 978 cbe_lun->blocksize = params->blocksize_bytes; 979 else if (cbe_lun->lun_type == T_CDROM) 980 cbe_lun->blocksize = 2048; 981 else 982 cbe_lun->blocksize = 512; 983 be_lun->pblockmul = be_lun->pblocksize / cbe_lun->blocksize; 984 if (be_lun->pblockmul < 1 || !powerof2(be_lun->pblockmul)) { 985 snprintf(req->error_str, sizeof(req->error_str), 986 "%s: pblocksize %u not exp2 of blocksize %u", 987 __func__, 988 be_lun->pblocksize, cbe_lun->blocksize); 989 goto bailout_error; 990 } 991 if (params->lun_size_bytes < cbe_lun->blocksize) { 992 snprintf(req->error_str, sizeof(req->error_str), 993 "%s: LUN size %ju < blocksize %u", __func__, 994 params->lun_size_bytes, cbe_lun->blocksize); 995 goto bailout_error; 996 } 997 be_lun->size_blocks = params->lun_size_bytes / cbe_lun->blocksize; 998 be_lun->size_bytes = be_lun->size_blocks * cbe_lun->blocksize; 999 be_lun->indir = 0; 1000 t = be_lun->size_bytes / be_lun->pblocksize; 1001 while (t > 1) { 1002 t /= PPP; 1003 be_lun->indir++; 1004 } 1005 cbe_lun->maxlba = be_lun->size_blocks - 1; 1006 cbe_lun->pblockexp = fls(be_lun->pblockmul) - 1; 1007 cbe_lun->pblockoff = 0; 1008 cbe_lun->ublockexp = cbe_lun->pblockexp; 1009 cbe_lun->ublockoff = 0; 1010 cbe_lun->atomicblock = be_lun->pblocksize; 1011 cbe_lun->opttxferlen = SGPP * be_lun->pblocksize; 1012 value = dnvlist_get_string(cbe_lun->options, "capacity", NULL); 1013 if (value != NULL) 1014 ctl_expand_number(value, &be_lun->cap_bytes); 1015 } else { 1016 be_lun->pblockmul = 1; 1017 cbe_lun->pblockexp = 0; 1018 } 1019 1020 /* Tell the user the blocksize we ended up using */ 1021 params->blocksize_bytes = cbe_lun->blocksize; 1022 params->lun_size_bytes = be_lun->size_bytes; 1023 1024 value = dnvlist_get_string(cbe_lun->options, "unmap", NULL); 1025 if (value == NULL || strcmp(value, "off") != 0) 1026 cbe_lun->flags |= CTL_LUN_FLAG_UNMAP; 1027 value = dnvlist_get_string(cbe_lun->options, "readonly", NULL); 1028 if (value != NULL) { 1029 if (strcmp(value, "on") == 0) 1030 cbe_lun->flags |= CTL_LUN_FLAG_READONLY; 1031 } else if (cbe_lun->lun_type != T_DIRECT) 1032 cbe_lun->flags |= CTL_LUN_FLAG_READONLY; 1033 cbe_lun->serseq = CTL_LUN_SERSEQ_OFF; 1034 value = dnvlist_get_string(cbe_lun->options, "serseq", NULL); 1035 if (value != NULL && strcmp(value, "on") == 0) 1036 cbe_lun->serseq = CTL_LUN_SERSEQ_ON; 1037 else if (value != NULL && strcmp(value, "read") == 0) 1038 cbe_lun->serseq = CTL_LUN_SERSEQ_READ; 1039 else if (value != NULL && strcmp(value, "off") == 0) 1040 cbe_lun->serseq = CTL_LUN_SERSEQ_OFF; 1041 1042 if (params->flags & CTL_LUN_FLAG_ID_REQ) { 1043 cbe_lun->req_lun_id = params->req_lun_id; 1044 cbe_lun->flags |= CTL_LUN_FLAG_ID_REQ; 1045 } else 1046 cbe_lun->req_lun_id = 0; 1047 1048 cbe_lun->lun_shutdown = ctl_backend_ramdisk_lun_shutdown; 1049 cbe_lun->be = &ctl_be_ramdisk_driver; 1050 if ((params->flags & CTL_LUN_FLAG_SERIAL_NUM) == 0) { 1051 snprintf(tmpstr, sizeof(tmpstr), "MYSERIAL%04d", 1052 softc->num_luns); 1053 strncpy((char *)cbe_lun->serial_num, tmpstr, 1054 MIN(sizeof(cbe_lun->serial_num), sizeof(tmpstr))); 1055 1056 /* Tell the user what we used for a serial number */ 1057 strncpy((char *)params->serial_num, tmpstr, 1058 MIN(sizeof(params->serial_num), sizeof(tmpstr))); 1059 } else { 1060 strncpy((char *)cbe_lun->serial_num, params->serial_num, 1061 MIN(sizeof(cbe_lun->serial_num), 1062 sizeof(params->serial_num))); 1063 } 1064 if ((params->flags & CTL_LUN_FLAG_DEVID) == 0) { 1065 snprintf(tmpstr, sizeof(tmpstr), "MYDEVID%04d", softc->num_luns); 1066 strncpy((char *)cbe_lun->device_id, tmpstr, 1067 MIN(sizeof(cbe_lun->device_id), sizeof(tmpstr))); 1068 1069 /* Tell the user what we used for a device ID */ 1070 strncpy((char *)params->device_id, tmpstr, 1071 MIN(sizeof(params->device_id), sizeof(tmpstr))); 1072 } else { 1073 strncpy((char *)cbe_lun->device_id, params->device_id, 1074 MIN(sizeof(cbe_lun->device_id), 1075 sizeof(params->device_id))); 1076 } 1077 1078 STAILQ_INIT(&be_lun->cont_queue); 1079 sx_init(&be_lun->page_lock, "ctlram page"); 1080 if (be_lun->cap_bytes == 0) { 1081 be_lun->indir = 0; 1082 be_lun->pages = malloc(be_lun->pblocksize, M_RAMDISK, M_WAITOK); 1083 } 1084 be_lun->zero_page = malloc(be_lun->pblocksize, M_RAMDISK, 1085 M_WAITOK|M_ZERO); 1086 mtx_init(&be_lun->queue_lock, "ctlram queue", NULL, MTX_DEF); 1087 TASK_INIT(&be_lun->io_task, /*priority*/0, ctl_backend_ramdisk_worker, 1088 be_lun); 1089 1090 be_lun->io_taskqueue = taskqueue_create("ctlramtq", M_WAITOK, 1091 taskqueue_thread_enqueue, /*context*/&be_lun->io_taskqueue); 1092 if (be_lun->io_taskqueue == NULL) { 1093 snprintf(req->error_str, sizeof(req->error_str), 1094 "%s: Unable to create taskqueue", __func__); 1095 goto bailout_error; 1096 } 1097 1098 retval = taskqueue_start_threads_in_proc(&be_lun->io_taskqueue, 1099 /*num threads*/1, 1100 /*priority*/PUSER, 1101 /*proc*/control_softc->ctl_proc, 1102 /*thread name*/"ramdisk"); 1103 if (retval != 0) 1104 goto bailout_error; 1105 1106 retval = ctl_add_lun(&be_lun->cbe_lun); 1107 if (retval != 0) { 1108 snprintf(req->error_str, sizeof(req->error_str), 1109 "%s: ctl_add_lun() returned error %d, see dmesg for " 1110 "details", __func__, retval); 1111 retval = 0; 1112 goto bailout_error; 1113 } 1114 1115 mtx_lock(&softc->lock); 1116 softc->num_luns++; 1117 SLIST_INSERT_HEAD(&softc->lun_list, be_lun, links); 1118 mtx_unlock(&softc->lock); 1119 1120 params->req_lun_id = cbe_lun->lun_id; 1121 1122 req->status = CTL_LUN_OK; 1123 return (retval); 1124 1125 bailout_error: 1126 req->status = CTL_LUN_ERROR; 1127 if (be_lun != NULL) { 1128 if (be_lun->io_taskqueue != NULL) 1129 taskqueue_free(be_lun->io_taskqueue); 1130 nvlist_destroy(cbe_lun->options); 1131 free(be_lun->zero_page, M_RAMDISK); 1132 ctl_backend_ramdisk_freeallpages(be_lun->pages, be_lun->indir); 1133 sx_destroy(&be_lun->page_lock); 1134 mtx_destroy(&be_lun->queue_lock); 1135 free(be_lun, M_RAMDISK); 1136 } 1137 return (retval); 1138 } 1139 1140 static int 1141 ctl_backend_ramdisk_modify(struct ctl_be_ramdisk_softc *softc, 1142 struct ctl_lun_req *req) 1143 { 1144 struct ctl_be_ramdisk_lun *be_lun; 1145 struct ctl_be_lun *cbe_lun; 1146 struct ctl_lun_modify_params *params; 1147 const char *value; 1148 uint32_t blocksize; 1149 int wasprim; 1150 1151 params = &req->reqdata.modify; 1152 sx_xlock(&softc->modify_lock); 1153 mtx_lock(&softc->lock); 1154 SLIST_FOREACH(be_lun, &softc->lun_list, links) { 1155 if (be_lun->cbe_lun.lun_id == params->lun_id) 1156 break; 1157 } 1158 mtx_unlock(&softc->lock); 1159 if (be_lun == NULL) { 1160 snprintf(req->error_str, sizeof(req->error_str), 1161 "%s: LUN %u is not managed by the ramdisk backend", 1162 __func__, params->lun_id); 1163 goto bailout_error; 1164 } 1165 cbe_lun = &be_lun->cbe_lun; 1166 1167 if (params->lun_size_bytes != 0) 1168 be_lun->params.lun_size_bytes = params->lun_size_bytes; 1169 1170 if (req->args_nvl != NULL) { 1171 nvlist_destroy(cbe_lun->options); 1172 cbe_lun->options = nvlist_clone(req->args_nvl); 1173 } 1174 1175 wasprim = (cbe_lun->flags & CTL_LUN_FLAG_PRIMARY); 1176 value = dnvlist_get_string(cbe_lun->options, "ha_role", NULL); 1177 if (value != NULL) { 1178 if (strcmp(value, "primary") == 0) 1179 cbe_lun->flags |= CTL_LUN_FLAG_PRIMARY; 1180 else 1181 cbe_lun->flags &= ~CTL_LUN_FLAG_PRIMARY; 1182 } else if (control_softc->flags & CTL_FLAG_ACTIVE_SHELF) 1183 cbe_lun->flags |= CTL_LUN_FLAG_PRIMARY; 1184 else 1185 cbe_lun->flags &= ~CTL_LUN_FLAG_PRIMARY; 1186 if (wasprim != (cbe_lun->flags & CTL_LUN_FLAG_PRIMARY)) { 1187 if (cbe_lun->flags & CTL_LUN_FLAG_PRIMARY) 1188 ctl_lun_primary(cbe_lun); 1189 else 1190 ctl_lun_secondary(cbe_lun); 1191 } 1192 1193 blocksize = be_lun->cbe_lun.blocksize; 1194 if (be_lun->params.lun_size_bytes < blocksize) { 1195 snprintf(req->error_str, sizeof(req->error_str), 1196 "%s: LUN size %ju < blocksize %u", __func__, 1197 be_lun->params.lun_size_bytes, blocksize); 1198 goto bailout_error; 1199 } 1200 be_lun->size_blocks = be_lun->params.lun_size_bytes / blocksize; 1201 be_lun->size_bytes = be_lun->size_blocks * blocksize; 1202 be_lun->cbe_lun.maxlba = be_lun->size_blocks - 1; 1203 ctl_lun_capacity_changed(&be_lun->cbe_lun); 1204 1205 /* Tell the user the exact size we ended up using */ 1206 params->lun_size_bytes = be_lun->size_bytes; 1207 1208 sx_xunlock(&softc->modify_lock); 1209 req->status = CTL_LUN_OK; 1210 return (0); 1211 1212 bailout_error: 1213 sx_xunlock(&softc->modify_lock); 1214 req->status = CTL_LUN_ERROR; 1215 return (0); 1216 } 1217 1218 static void 1219 ctl_backend_ramdisk_lun_shutdown(struct ctl_be_lun *cbe_lun) 1220 { 1221 struct ctl_be_ramdisk_lun *be_lun = (struct ctl_be_ramdisk_lun *)cbe_lun; 1222 struct ctl_be_ramdisk_softc *softc = be_lun->softc; 1223 1224 taskqueue_drain_all(be_lun->io_taskqueue); 1225 taskqueue_free(be_lun->io_taskqueue); 1226 nvlist_destroy(be_lun->cbe_lun.options); 1227 free(be_lun->zero_page, M_RAMDISK); 1228 ctl_backend_ramdisk_freeallpages(be_lun->pages, be_lun->indir); 1229 sx_destroy(&be_lun->page_lock); 1230 mtx_destroy(&be_lun->queue_lock); 1231 1232 mtx_lock(&softc->lock); 1233 be_lun->flags |= CTL_BE_RAMDISK_LUN_UNCONFIGURED; 1234 if (be_lun->flags & CTL_BE_RAMDISK_LUN_WAITING) 1235 wakeup(be_lun); 1236 else 1237 free(be_lun, M_RAMDISK); 1238 mtx_unlock(&softc->lock); 1239 } 1240