1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2010 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #include <sys/conf.h> 27 #include <sys/file.h> 28 #include <sys/ddi.h> 29 #include <sys/sunddi.h> 30 #include <sys/modctl.h> 31 #include <sys/scsi/scsi.h> 32 #include <sys/scsi/impl/scsi_reset_notify.h> 33 #include <sys/disp.h> 34 #include <sys/byteorder.h> 35 #include <sys/pathname.h> 36 #include <sys/atomic.h> 37 #include <sys/nvpair.h> 38 #include <sys/fs/zfs.h> 39 #include <sys/sdt.h> 40 #include <sys/dkio.h> 41 #include <sys/zfs_ioctl.h> 42 43 #include <stmf.h> 44 #include <lpif.h> 45 #include <stmf_ioctl.h> 46 #include <stmf_sbd.h> 47 #include <sbd_impl.h> 48 #include <stmf_sbd_ioctl.h> 49 50 #define SBD_IS_ZVOL(zvol) (strncmp("/dev/zvol", zvol, 9)) 51 52 extern sbd_status_t sbd_pgr_meta_init(sbd_lu_t *sl); 53 extern sbd_status_t sbd_pgr_meta_load(sbd_lu_t *sl); 54 extern void sbd_pgr_reset(sbd_lu_t *sl); 55 56 static int sbd_getinfo(dev_info_t *dip, ddi_info_cmd_t cmd, void *arg, 57 void **result); 58 static int sbd_attach(dev_info_t *dip, ddi_attach_cmd_t cmd); 59 static int sbd_detach(dev_info_t *dip, ddi_detach_cmd_t cmd); 60 static int sbd_open(dev_t *devp, int flag, int otype, cred_t *credp); 61 static int sbd_close(dev_t dev, int flag, int otype, cred_t *credp); 62 static int stmf_sbd_ioctl(dev_t dev, int cmd, intptr_t data, int mode, 63 cred_t *credp, int *rval); 64 void sbd_lp_cb(stmf_lu_provider_t *lp, int cmd, void *arg, uint32_t flags); 65 stmf_status_t sbd_proxy_reg_lu(uint8_t *luid, void *proxy_reg_arg, 66 uint32_t proxy_reg_arg_len); 67 stmf_status_t sbd_proxy_dereg_lu(uint8_t *luid, void *proxy_reg_arg, 68 uint32_t proxy_reg_arg_len); 69 stmf_status_t sbd_proxy_msg(uint8_t *luid, void *proxy_arg, 70 uint32_t proxy_arg_len, uint32_t type); 71 int sbd_create_register_lu(sbd_create_and_reg_lu_t *slu, int struct_sz, 72 uint32_t *err_ret); 73 int sbd_create_standby_lu(sbd_create_standby_lu_t *slu, uint32_t *err_ret); 74 int sbd_set_lu_standby(sbd_set_lu_standby_t *stlu, uint32_t *err_ret); 75 int sbd_import_lu(sbd_import_lu_t *ilu, int struct_sz, uint32_t *err_ret, 76 int no_register, sbd_lu_t **slr); 77 int sbd_import_active_lu(sbd_import_lu_t *ilu, sbd_lu_t *sl, uint32_t *err_ret); 78 int sbd_delete_lu(sbd_delete_lu_t *dlu, int struct_sz, uint32_t *err_ret); 79 int sbd_modify_lu(sbd_modify_lu_t *mlu, int struct_sz, uint32_t *err_ret); 80 int sbd_set_global_props(sbd_global_props_t *mlu, int struct_sz, 81 uint32_t *err_ret); 82 int sbd_get_global_props(sbd_global_props_t *oslp, uint32_t oslp_sz, 83 uint32_t *err_ret); 84 int sbd_get_lu_props(sbd_lu_props_t *islp, uint32_t islp_sz, 85 sbd_lu_props_t *oslp, uint32_t oslp_sz, uint32_t *err_ret); 86 char *sbd_get_zvol_name(sbd_lu_t *sl); 87 sbd_status_t sbd_create_zfs_meta_object(sbd_lu_t *sl); 88 sbd_status_t sbd_open_zfs_meta(sbd_lu_t *sl); 89 sbd_status_t sbd_read_zfs_meta(sbd_lu_t *sl, uint8_t *buf, uint64_t sz, 90 uint64_t off); 91 sbd_status_t sbd_write_zfs_meta(sbd_lu_t *sl, uint8_t *buf, uint64_t sz, 92 uint64_t off); 93 int sbd_is_zvol(char *path); 94 int sbd_zvolget(char *zvol_name, char **comstarprop); 95 int sbd_zvolset(char *zvol_name, char *comstarprop); 96 char sbd_ctoi(char c); 97 void sbd_close_lu(sbd_lu_t *sl); 98 99 static ldi_ident_t sbd_zfs_ident; 100 static stmf_lu_provider_t *sbd_lp; 101 static sbd_lu_t *sbd_lu_list = NULL; 102 static kmutex_t sbd_lock; 103 static dev_info_t *sbd_dip; 104 static uint32_t sbd_lu_count = 0; 105 106 /* Global property settings for the logical unit */ 107 char sbd_vendor_id[] = "SUN "; 108 char sbd_product_id[] = "COMSTAR "; 109 char sbd_revision[] = "1.0 "; 110 char *sbd_mgmt_url = NULL; 111 uint16_t sbd_mgmt_url_alloc_size = 0; 112 krwlock_t sbd_global_prop_lock; 113 114 static char sbd_name[] = "sbd"; 115 116 static struct cb_ops sbd_cb_ops = { 117 sbd_open, /* open */ 118 sbd_close, /* close */ 119 nodev, /* strategy */ 120 nodev, /* print */ 121 nodev, /* dump */ 122 nodev, /* read */ 123 nodev, /* write */ 124 stmf_sbd_ioctl, /* ioctl */ 125 nodev, /* devmap */ 126 nodev, /* mmap */ 127 nodev, /* segmap */ 128 nochpoll, /* chpoll */ 129 ddi_prop_op, /* cb_prop_op */ 130 0, /* streamtab */ 131 D_NEW | D_MP, /* cb_flag */ 132 CB_REV, /* rev */ 133 nodev, /* aread */ 134 nodev /* awrite */ 135 }; 136 137 static struct dev_ops sbd_ops = { 138 DEVO_REV, 139 0, 140 sbd_getinfo, 141 nulldev, /* identify */ 142 nulldev, /* probe */ 143 sbd_attach, 144 sbd_detach, 145 nodev, /* reset */ 146 &sbd_cb_ops, 147 NULL, /* bus_ops */ 148 NULL /* power */ 149 }; 150 151 #define SBD_NAME "COMSTAR SBD" 152 153 static struct modldrv modldrv = { 154 &mod_driverops, 155 SBD_NAME, 156 &sbd_ops 157 }; 158 159 static struct modlinkage modlinkage = { 160 MODREV_1, 161 &modldrv, 162 NULL 163 }; 164 165 int 166 _init(void) 167 { 168 int ret; 169 170 ret = mod_install(&modlinkage); 171 if (ret) 172 return (ret); 173 sbd_lp = (stmf_lu_provider_t *)stmf_alloc(STMF_STRUCT_LU_PROVIDER, 174 0, 0); 175 sbd_lp->lp_lpif_rev = LPIF_REV_2; 176 sbd_lp->lp_instance = 0; 177 sbd_lp->lp_name = sbd_name; 178 sbd_lp->lp_cb = sbd_lp_cb; 179 sbd_lp->lp_alua_support = 1; 180 sbd_lp->lp_proxy_msg = sbd_proxy_msg; 181 sbd_zfs_ident = ldi_ident_from_anon(); 182 183 if (stmf_register_lu_provider(sbd_lp) != STMF_SUCCESS) { 184 (void) mod_remove(&modlinkage); 185 stmf_free(sbd_lp); 186 return (EINVAL); 187 } 188 mutex_init(&sbd_lock, NULL, MUTEX_DRIVER, NULL); 189 rw_init(&sbd_global_prop_lock, NULL, RW_DRIVER, NULL); 190 return (0); 191 } 192 193 int 194 _fini(void) 195 { 196 int ret; 197 198 /* 199 * If we have registered lus, then make sure they are all offline 200 * if so then deregister them. This should drop the sbd_lu_count 201 * to zero. 202 */ 203 if (sbd_lu_count) { 204 sbd_lu_t *slu; 205 206 /* See if all of them are offline */ 207 mutex_enter(&sbd_lock); 208 for (slu = sbd_lu_list; slu != NULL; slu = slu->sl_next) { 209 if ((slu->sl_state != STMF_STATE_OFFLINE) || 210 slu->sl_state_not_acked) { 211 mutex_exit(&sbd_lock); 212 return (EBUSY); 213 } 214 } 215 mutex_exit(&sbd_lock); 216 217 #if 0 218 /* ok start deregistering them */ 219 while (sbd_lu_list) { 220 sbd_store_t *sst = sbd_lu_list->sl_sst; 221 if (sst->sst_deregister_lu(sst) != STMF_SUCCESS) 222 return (EBUSY); 223 } 224 #endif 225 return (EBUSY); 226 } 227 if (stmf_deregister_lu_provider(sbd_lp) != STMF_SUCCESS) 228 return (EBUSY); 229 ret = mod_remove(&modlinkage); 230 if (ret != 0) { 231 (void) stmf_register_lu_provider(sbd_lp); 232 return (ret); 233 } 234 stmf_free(sbd_lp); 235 mutex_destroy(&sbd_lock); 236 rw_destroy(&sbd_global_prop_lock); 237 ldi_ident_release(sbd_zfs_ident); 238 return (0); 239 } 240 241 int 242 _info(struct modinfo *modinfop) 243 { 244 return (mod_info(&modlinkage, modinfop)); 245 } 246 247 /* ARGSUSED */ 248 static int 249 sbd_getinfo(dev_info_t *dip, ddi_info_cmd_t cmd, void *arg, void **result) 250 { 251 switch (cmd) { 252 case DDI_INFO_DEVT2DEVINFO: 253 *result = sbd_dip; 254 break; 255 case DDI_INFO_DEVT2INSTANCE: 256 *result = (void *)(uintptr_t)ddi_get_instance(sbd_dip); 257 break; 258 default: 259 return (DDI_FAILURE); 260 } 261 262 return (DDI_SUCCESS); 263 } 264 265 static int 266 sbd_attach(dev_info_t *dip, ddi_attach_cmd_t cmd) 267 { 268 switch (cmd) { 269 case DDI_ATTACH: 270 sbd_dip = dip; 271 272 if (ddi_create_minor_node(dip, "admin", S_IFCHR, 0, 273 DDI_NT_STMF_LP, 0) != DDI_SUCCESS) { 274 break; 275 } 276 ddi_report_dev(dip); 277 return (DDI_SUCCESS); 278 } 279 280 return (DDI_FAILURE); 281 } 282 283 static int 284 sbd_detach(dev_info_t *dip, ddi_detach_cmd_t cmd) 285 { 286 switch (cmd) { 287 case DDI_DETACH: 288 ddi_remove_minor_node(dip, 0); 289 return (DDI_SUCCESS); 290 } 291 292 return (DDI_FAILURE); 293 } 294 295 /* ARGSUSED */ 296 static int 297 sbd_open(dev_t *devp, int flag, int otype, cred_t *credp) 298 { 299 if (otype != OTYP_CHR) 300 return (EINVAL); 301 return (0); 302 } 303 304 /* ARGSUSED */ 305 static int 306 sbd_close(dev_t dev, int flag, int otype, cred_t *credp) 307 { 308 return (0); 309 } 310 311 /* ARGSUSED */ 312 static int 313 stmf_sbd_ioctl(dev_t dev, int cmd, intptr_t data, int mode, 314 cred_t *credp, int *rval) 315 { 316 stmf_iocdata_t *iocd; 317 void *ibuf = NULL; 318 void *obuf = NULL; 319 sbd_lu_t *nsl; 320 int i; 321 int ret; 322 323 if (drv_priv(credp) != 0) { 324 return (EPERM); 325 } 326 327 ret = stmf_copyin_iocdata(data, mode, &iocd, &ibuf, &obuf); 328 if (ret) 329 return (ret); 330 iocd->stmf_error = 0; 331 332 switch (cmd) { 333 case SBD_IOCTL_CREATE_AND_REGISTER_LU: 334 if (iocd->stmf_ibuf_size < 335 (sizeof (sbd_create_and_reg_lu_t) - 8)) { 336 ret = EFAULT; 337 break; 338 } 339 if ((iocd->stmf_obuf_size == 0) || 340 (iocd->stmf_obuf_size > iocd->stmf_ibuf_size)) { 341 ret = EINVAL; 342 break; 343 } 344 ret = sbd_create_register_lu((sbd_create_and_reg_lu_t *) 345 ibuf, iocd->stmf_ibuf_size, &iocd->stmf_error); 346 bcopy(ibuf, obuf, iocd->stmf_obuf_size); 347 break; 348 case SBD_IOCTL_SET_LU_STANDBY: 349 if (iocd->stmf_ibuf_size < sizeof (sbd_set_lu_standby_t)) { 350 ret = EFAULT; 351 break; 352 } 353 if (iocd->stmf_obuf_size) { 354 ret = EINVAL; 355 break; 356 } 357 ret = sbd_set_lu_standby((sbd_set_lu_standby_t *)ibuf, 358 &iocd->stmf_error); 359 break; 360 case SBD_IOCTL_IMPORT_LU: 361 if (iocd->stmf_ibuf_size < 362 (sizeof (sbd_import_lu_t) - 8)) { 363 ret = EFAULT; 364 break; 365 } 366 if ((iocd->stmf_obuf_size == 0) || 367 (iocd->stmf_obuf_size > iocd->stmf_ibuf_size)) { 368 ret = EINVAL; 369 break; 370 } 371 ret = sbd_import_lu((sbd_import_lu_t *)ibuf, 372 iocd->stmf_ibuf_size, &iocd->stmf_error, 0, NULL); 373 bcopy(ibuf, obuf, iocd->stmf_obuf_size); 374 break; 375 case SBD_IOCTL_DELETE_LU: 376 if (iocd->stmf_ibuf_size < (sizeof (sbd_delete_lu_t) - 8)) { 377 ret = EFAULT; 378 break; 379 } 380 if (iocd->stmf_obuf_size) { 381 ret = EINVAL; 382 break; 383 } 384 ret = sbd_delete_lu((sbd_delete_lu_t *)ibuf, 385 iocd->stmf_ibuf_size, &iocd->stmf_error); 386 break; 387 case SBD_IOCTL_MODIFY_LU: 388 if (iocd->stmf_ibuf_size < (sizeof (sbd_modify_lu_t) - 8)) { 389 ret = EFAULT; 390 break; 391 } 392 if (iocd->stmf_obuf_size) { 393 ret = EINVAL; 394 break; 395 } 396 ret = sbd_modify_lu((sbd_modify_lu_t *)ibuf, 397 iocd->stmf_ibuf_size, &iocd->stmf_error); 398 break; 399 case SBD_IOCTL_SET_GLOBAL_LU: 400 if (iocd->stmf_ibuf_size < (sizeof (sbd_global_props_t) - 8)) { 401 ret = EFAULT; 402 break; 403 } 404 if (iocd->stmf_obuf_size) { 405 ret = EINVAL; 406 break; 407 } 408 ret = sbd_set_global_props((sbd_global_props_t *)ibuf, 409 iocd->stmf_ibuf_size, &iocd->stmf_error); 410 break; 411 case SBD_IOCTL_GET_GLOBAL_LU: 412 if (iocd->stmf_ibuf_size) { 413 ret = EINVAL; 414 break; 415 } 416 if (iocd->stmf_obuf_size < sizeof (sbd_global_props_t)) { 417 ret = EINVAL; 418 break; 419 } 420 ret = sbd_get_global_props((sbd_global_props_t *)obuf, 421 iocd->stmf_obuf_size, &iocd->stmf_error); 422 break; 423 case SBD_IOCTL_GET_LU_PROPS: 424 if (iocd->stmf_ibuf_size < (sizeof (sbd_lu_props_t) - 8)) { 425 ret = EFAULT; 426 break; 427 } 428 if (iocd->stmf_obuf_size < sizeof (sbd_lu_props_t)) { 429 ret = EINVAL; 430 break; 431 } 432 ret = sbd_get_lu_props((sbd_lu_props_t *)ibuf, 433 iocd->stmf_ibuf_size, (sbd_lu_props_t *)obuf, 434 iocd->stmf_obuf_size, &iocd->stmf_error); 435 break; 436 case SBD_IOCTL_GET_LU_LIST: 437 mutex_enter(&sbd_lock); 438 iocd->stmf_obuf_max_nentries = sbd_lu_count; 439 iocd->stmf_obuf_nentries = min((iocd->stmf_obuf_size >> 4), 440 sbd_lu_count); 441 for (nsl = sbd_lu_list, i = 0; nsl && 442 (i < iocd->stmf_obuf_nentries); i++, nsl = nsl->sl_next) { 443 bcopy(nsl->sl_device_id + 4, 444 &(((uint8_t *)obuf)[i << 4]), 16); 445 } 446 mutex_exit(&sbd_lock); 447 ret = 0; 448 iocd->stmf_error = 0; 449 break; 450 default: 451 ret = ENOTTY; 452 } 453 454 if (ret == 0) { 455 ret = stmf_copyout_iocdata(data, mode, iocd, obuf); 456 } else if (iocd->stmf_error) { 457 (void) stmf_copyout_iocdata(data, mode, iocd, obuf); 458 } 459 if (obuf) { 460 kmem_free(obuf, iocd->stmf_obuf_size); 461 obuf = NULL; 462 } 463 if (ibuf) { 464 kmem_free(ibuf, iocd->stmf_ibuf_size); 465 ibuf = NULL; 466 } 467 kmem_free(iocd, sizeof (stmf_iocdata_t)); 468 return (ret); 469 } 470 471 /* ARGSUSED */ 472 void 473 sbd_lp_cb(stmf_lu_provider_t *lp, int cmd, void *arg, uint32_t flags) 474 { 475 nvpair_t *np; 476 char *s; 477 sbd_import_lu_t *ilu; 478 uint32_t ilu_sz; 479 uint32_t struct_sz; 480 uint32_t err_ret; 481 int iret; 482 483 if ((cmd != STMF_PROVIDER_DATA_UPDATED) || (arg == NULL)) { 484 return; 485 } 486 487 if ((flags & (STMF_PCB_STMF_ONLINING | STMF_PCB_PREG_COMPLETE)) == 0) { 488 return; 489 } 490 491 np = NULL; 492 ilu_sz = 1024; 493 ilu = (sbd_import_lu_t *)kmem_zalloc(ilu_sz, KM_SLEEP); 494 while ((np = nvlist_next_nvpair((nvlist_t *)arg, np)) != NULL) { 495 if (nvpair_type(np) != DATA_TYPE_STRING) { 496 continue; 497 } 498 if (nvpair_value_string(np, &s) != 0) { 499 continue; 500 } 501 struct_sz = max(8, strlen(s) + 1); 502 struct_sz += sizeof (sbd_import_lu_t) - 8; 503 if (struct_sz > ilu_sz) { 504 kmem_free(ilu, ilu_sz); 505 ilu_sz = struct_sz + 32; 506 ilu = (sbd_import_lu_t *)kmem_zalloc(ilu_sz, KM_SLEEP); 507 } 508 ilu->ilu_struct_size = struct_sz; 509 (void) strcpy(ilu->ilu_meta_fname, s); 510 iret = sbd_import_lu(ilu, struct_sz, &err_ret, 0, NULL); 511 if (iret) { 512 stmf_trace(0, "sbd_lp_cb: import_lu failed, ret = %d, " 513 "err_ret = %d", iret, err_ret); 514 } else { 515 stmf_trace(0, "Imported the LU %s", nvpair_name(np)); 516 } 517 } 518 519 if (ilu) { 520 kmem_free(ilu, ilu_sz); 521 ilu = NULL; 522 } 523 } 524 525 sbd_status_t 526 sbd_link_lu(sbd_lu_t *sl) 527 { 528 sbd_lu_t *nsl; 529 530 mutex_enter(&sbd_lock); 531 mutex_enter(&sl->sl_lock); 532 ASSERT(sl->sl_trans_op != SL_OP_NONE); 533 534 if (sl->sl_flags & SL_LINKED) { 535 mutex_exit(&sbd_lock); 536 mutex_exit(&sl->sl_lock); 537 return (SBD_ALREADY); 538 } 539 for (nsl = sbd_lu_list; nsl; nsl = nsl->sl_next) { 540 if (strcmp(nsl->sl_name, sl->sl_name) == 0) 541 break; 542 } 543 if (nsl) { 544 mutex_exit(&sbd_lock); 545 mutex_exit(&sl->sl_lock); 546 return (SBD_ALREADY); 547 } 548 sl->sl_next = sbd_lu_list; 549 sbd_lu_list = sl; 550 sl->sl_flags |= SL_LINKED; 551 mutex_exit(&sbd_lock); 552 mutex_exit(&sl->sl_lock); 553 return (SBD_SUCCESS); 554 } 555 556 void 557 sbd_unlink_lu(sbd_lu_t *sl) 558 { 559 sbd_lu_t **ppnsl; 560 561 mutex_enter(&sbd_lock); 562 mutex_enter(&sl->sl_lock); 563 ASSERT(sl->sl_trans_op != SL_OP_NONE); 564 565 ASSERT(sl->sl_flags & SL_LINKED); 566 for (ppnsl = &sbd_lu_list; *ppnsl; ppnsl = &((*ppnsl)->sl_next)) { 567 if (*ppnsl == sl) 568 break; 569 } 570 ASSERT(*ppnsl); 571 *ppnsl = (*ppnsl)->sl_next; 572 sl->sl_flags &= ~SL_LINKED; 573 mutex_exit(&sbd_lock); 574 mutex_exit(&sl->sl_lock); 575 } 576 577 sbd_status_t 578 sbd_find_and_lock_lu(uint8_t *guid, uint8_t *meta_name, uint8_t op, 579 sbd_lu_t **ppsl) 580 { 581 sbd_lu_t *sl; 582 int found = 0; 583 sbd_status_t sret; 584 585 mutex_enter(&sbd_lock); 586 for (sl = sbd_lu_list; sl; sl = sl->sl_next) { 587 if (guid) { 588 found = bcmp(sl->sl_device_id + 4, guid, 16) == 0; 589 } else { 590 found = strcmp(sl->sl_name, (char *)meta_name) == 0; 591 } 592 if (found) 593 break; 594 } 595 if (!found) { 596 mutex_exit(&sbd_lock); 597 return (SBD_NOT_FOUND); 598 } 599 mutex_enter(&sl->sl_lock); 600 if (sl->sl_trans_op == SL_OP_NONE) { 601 sl->sl_trans_op = op; 602 *ppsl = sl; 603 sret = SBD_SUCCESS; 604 } else { 605 sret = SBD_BUSY; 606 } 607 mutex_exit(&sl->sl_lock); 608 mutex_exit(&sbd_lock); 609 return (sret); 610 } 611 612 sbd_status_t 613 sbd_read_meta(sbd_lu_t *sl, uint64_t offset, uint64_t size, uint8_t *buf) 614 { 615 uint64_t meta_align; 616 uint64_t starting_off; 617 uint64_t data_off; 618 uint64_t ending_off; 619 uint64_t io_size; 620 uint8_t *io_buf; 621 vnode_t *vp; 622 sbd_status_t ret; 623 ssize_t resid; 624 int vret; 625 626 ASSERT(sl->sl_flags & SL_META_OPENED); 627 if (sl->sl_flags & SL_SHARED_META) { 628 meta_align = (((uint64_t)1) << sl->sl_data_blocksize_shift) - 1; 629 vp = sl->sl_data_vp; 630 ASSERT(vp); 631 } else { 632 meta_align = (((uint64_t)1) << sl->sl_meta_blocksize_shift) - 1; 633 if ((sl->sl_flags & SL_ZFS_META) == 0) { 634 vp = sl->sl_meta_vp; 635 ASSERT(vp); 636 } 637 } 638 starting_off = offset & ~(meta_align); 639 data_off = offset & meta_align; 640 ending_off = (offset + size + meta_align) & (~meta_align); 641 if (ending_off > sl->sl_meta_size_used) { 642 bzero(buf, size); 643 if (starting_off >= sl->sl_meta_size_used) { 644 return (SBD_SUCCESS); 645 } 646 ending_off = (sl->sl_meta_size_used + meta_align) & 647 (~meta_align); 648 if (size > (ending_off - (starting_off + data_off))) { 649 size = ending_off - (starting_off + data_off); 650 } 651 } 652 io_size = ending_off - starting_off; 653 io_buf = (uint8_t *)kmem_zalloc(io_size, KM_SLEEP); 654 ASSERT((starting_off + io_size) <= sl->sl_total_meta_size); 655 656 /* 657 * Don't proceed if the device has been closed 658 * This can occur on an access state change to standby or 659 * a delete. The writer lock is acquired before closing the 660 * lu. If importing, reading the metadata is valid, hence 661 * the check on SL_OP_IMPORT_LU. 662 */ 663 rw_enter(&sl->sl_access_state_lock, RW_READER); 664 if ((sl->sl_flags & SL_MEDIA_LOADED) == 0 && 665 sl->sl_trans_op != SL_OP_IMPORT_LU) { 666 rw_exit(&sl->sl_access_state_lock); 667 ret = SBD_FILEIO_FAILURE; 668 goto sbd_read_meta_failure; 669 } 670 if (sl->sl_flags & SL_ZFS_META) { 671 if ((ret = sbd_read_zfs_meta(sl, io_buf, io_size, 672 starting_off)) != SBD_SUCCESS) { 673 rw_exit(&sl->sl_access_state_lock); 674 goto sbd_read_meta_failure; 675 } 676 } else { 677 vret = vn_rdwr(UIO_READ, vp, (caddr_t)io_buf, (ssize_t)io_size, 678 (offset_t)starting_off, UIO_SYSSPACE, FRSYNC, 679 RLIM64_INFINITY, CRED(), &resid); 680 681 if (vret || resid) { 682 ret = SBD_FILEIO_FAILURE | vret; 683 rw_exit(&sl->sl_access_state_lock); 684 goto sbd_read_meta_failure; 685 } 686 } 687 rw_exit(&sl->sl_access_state_lock); 688 689 bcopy(io_buf + data_off, buf, size); 690 ret = SBD_SUCCESS; 691 692 sbd_read_meta_failure: 693 kmem_free(io_buf, io_size); 694 return (ret); 695 } 696 697 sbd_status_t 698 sbd_write_meta(sbd_lu_t *sl, uint64_t offset, uint64_t size, uint8_t *buf) 699 { 700 uint64_t meta_align; 701 uint64_t starting_off; 702 uint64_t data_off; 703 uint64_t ending_off; 704 uint64_t io_size; 705 uint8_t *io_buf; 706 vnode_t *vp; 707 sbd_status_t ret; 708 ssize_t resid; 709 int vret; 710 711 ASSERT(sl->sl_flags & SL_META_OPENED); 712 if (sl->sl_flags & SL_SHARED_META) { 713 meta_align = (((uint64_t)1) << sl->sl_data_blocksize_shift) - 1; 714 vp = sl->sl_data_vp; 715 ASSERT(vp); 716 } else { 717 meta_align = (((uint64_t)1) << sl->sl_meta_blocksize_shift) - 1; 718 if ((sl->sl_flags & SL_ZFS_META) == 0) { 719 vp = sl->sl_meta_vp; 720 ASSERT(vp); 721 } 722 } 723 starting_off = offset & ~(meta_align); 724 data_off = offset & meta_align; 725 ending_off = (offset + size + meta_align) & (~meta_align); 726 io_size = ending_off - starting_off; 727 io_buf = (uint8_t *)kmem_zalloc(io_size, KM_SLEEP); 728 ret = sbd_read_meta(sl, starting_off, io_size, io_buf); 729 if (ret != SBD_SUCCESS) { 730 goto sbd_write_meta_failure; 731 } 732 bcopy(buf, io_buf + data_off, size); 733 /* 734 * Don't proceed if the device has been closed 735 * This can occur on an access state change to standby or 736 * a delete. The writer lock is acquired before closing the 737 * lu. If importing, reading the metadata is valid, hence 738 * the check on SL_OP_IMPORT_LU. 739 */ 740 rw_enter(&sl->sl_access_state_lock, RW_READER); 741 if ((sl->sl_flags & SL_MEDIA_LOADED) == 0 && 742 sl->sl_trans_op != SL_OP_IMPORT_LU) { 743 rw_exit(&sl->sl_access_state_lock); 744 ret = SBD_FILEIO_FAILURE; 745 goto sbd_write_meta_failure; 746 } 747 if (sl->sl_flags & SL_ZFS_META) { 748 if ((ret = sbd_write_zfs_meta(sl, io_buf, io_size, 749 starting_off)) != SBD_SUCCESS) { 750 rw_exit(&sl->sl_access_state_lock); 751 goto sbd_write_meta_failure; 752 } 753 } else { 754 vret = vn_rdwr(UIO_WRITE, vp, (caddr_t)io_buf, (ssize_t)io_size, 755 (offset_t)starting_off, UIO_SYSSPACE, FDSYNC, 756 RLIM64_INFINITY, CRED(), &resid); 757 758 if (vret || resid) { 759 ret = SBD_FILEIO_FAILURE | vret; 760 rw_exit(&sl->sl_access_state_lock); 761 goto sbd_write_meta_failure; 762 } 763 } 764 rw_exit(&sl->sl_access_state_lock); 765 766 ret = SBD_SUCCESS; 767 768 sbd_write_meta_failure: 769 kmem_free(io_buf, io_size); 770 return (ret); 771 } 772 773 uint8_t 774 sbd_calc_sum(uint8_t *buf, int size) 775 { 776 uint8_t s = 0; 777 778 while (size > 0) 779 s += buf[--size]; 780 781 return (s); 782 } 783 784 uint8_t 785 sbd_calc_section_sum(sm_section_hdr_t *sm, uint32_t sz) 786 { 787 uint8_t s, o; 788 789 o = sm->sms_chksum; 790 sm->sms_chksum = 0; 791 s = sbd_calc_sum((uint8_t *)sm, sz); 792 sm->sms_chksum = o; 793 794 return (s); 795 } 796 797 uint32_t 798 sbd_strlen(char *str, uint32_t maxlen) 799 { 800 uint32_t i; 801 802 for (i = 0; i < maxlen; i++) { 803 if (str[i] == 0) 804 return (i); 805 } 806 return (i); 807 } 808 809 void 810 sbd_swap_meta_start(sbd_meta_start_t *sm) 811 { 812 if (sm->sm_magic == SBD_MAGIC) 813 return; 814 sm->sm_magic = BSWAP_64(sm->sm_magic); 815 sm->sm_meta_size = BSWAP_64(sm->sm_meta_size); 816 sm->sm_meta_size_used = BSWAP_64(sm->sm_meta_size_used); 817 sm->sm_ver_major = BSWAP_16(sm->sm_ver_major); 818 sm->sm_ver_minor = BSWAP_16(sm->sm_ver_minor); 819 sm->sm_ver_subminor = BSWAP_16(sm->sm_ver_subminor); 820 } 821 822 void 823 sbd_swap_section_hdr(sm_section_hdr_t *sm) 824 { 825 if (sm->sms_data_order == SMS_DATA_ORDER) 826 return; 827 sm->sms_offset = BSWAP_64(sm->sms_offset); 828 sm->sms_size = BSWAP_32(sm->sms_size); 829 sm->sms_id = BSWAP_16(sm->sms_id); 830 sm->sms_chksum += SMS_DATA_ORDER - sm->sms_data_order; 831 sm->sms_data_order = SMS_DATA_ORDER; 832 } 833 834 void 835 sbd_swap_lu_info_1_0(sbd_lu_info_1_0_t *sli) 836 { 837 sbd_swap_section_hdr(&sli->sli_sms_header); 838 if (sli->sli_data_order == SMS_DATA_ORDER) 839 return; 840 sli->sli_sms_header.sms_chksum += SMS_DATA_ORDER - sli->sli_data_order; 841 sli->sli_data_order = SMS_DATA_ORDER; 842 sli->sli_total_store_size = BSWAP_64(sli->sli_total_store_size); 843 sli->sli_total_meta_size = BSWAP_64(sli->sli_total_meta_size); 844 sli->sli_lu_data_offset = BSWAP_64(sli->sli_lu_data_offset); 845 sli->sli_lu_data_size = BSWAP_64(sli->sli_lu_data_size); 846 sli->sli_flags = BSWAP_32(sli->sli_flags); 847 sli->sli_blocksize = BSWAP_16(sli->sli_blocksize); 848 } 849 850 void 851 sbd_swap_lu_info_1_1(sbd_lu_info_1_1_t *sli) 852 { 853 sbd_swap_section_hdr(&sli->sli_sms_header); 854 if (sli->sli_data_order == SMS_DATA_ORDER) 855 return; 856 sli->sli_sms_header.sms_chksum += SMS_DATA_ORDER - sli->sli_data_order; 857 sli->sli_data_order = SMS_DATA_ORDER; 858 sli->sli_flags = BSWAP_32(sli->sli_flags); 859 sli->sli_lu_size = BSWAP_64(sli->sli_lu_size); 860 sli->sli_meta_fname_offset = BSWAP_64(sli->sli_meta_fname_offset); 861 sli->sli_data_fname_offset = BSWAP_64(sli->sli_data_fname_offset); 862 sli->sli_serial_offset = BSWAP_64(sli->sli_serial_offset); 863 sli->sli_alias_offset = BSWAP_64(sli->sli_alias_offset); 864 sli->sli_mgmt_url_offset = BSWAP_64(sli->sli_mgmt_url_offset); 865 } 866 867 sbd_status_t 868 sbd_load_section_hdr(sbd_lu_t *sl, sm_section_hdr_t *sms) 869 { 870 sm_section_hdr_t h; 871 uint64_t st; 872 sbd_status_t ret; 873 874 for (st = sl->sl_meta_offset + sizeof (sbd_meta_start_t); 875 st < sl->sl_meta_size_used; st += h.sms_size) { 876 if ((ret = sbd_read_meta(sl, st, sizeof (sm_section_hdr_t), 877 (uint8_t *)&h)) != SBD_SUCCESS) { 878 return (ret); 879 } 880 if (h.sms_data_order != SMS_DATA_ORDER) { 881 sbd_swap_section_hdr(&h); 882 } 883 if ((h.sms_data_order != SMS_DATA_ORDER) || 884 (h.sms_offset != st) || (h.sms_size < sizeof (h)) || 885 ((st + h.sms_size) > sl->sl_meta_size_used)) { 886 return (SBD_META_CORRUPTED); 887 } 888 if (h.sms_id == sms->sms_id) { 889 bcopy(&h, sms, sizeof (h)); 890 return (SBD_SUCCESS); 891 } 892 } 893 894 return (SBD_NOT_FOUND); 895 } 896 897 sbd_status_t 898 sbd_load_meta_start(sbd_lu_t *sl) 899 { 900 sbd_meta_start_t *sm; 901 sbd_status_t ret; 902 903 /* Fake meta params initially */ 904 sl->sl_total_meta_size = (uint64_t)-1; 905 sl->sl_meta_size_used = sl->sl_meta_offset + sizeof (sbd_meta_start_t); 906 907 sm = kmem_zalloc(sizeof (*sm), KM_SLEEP); 908 ret = sbd_read_meta(sl, sl->sl_meta_offset, sizeof (*sm), 909 (uint8_t *)sm); 910 if (ret != SBD_SUCCESS) { 911 goto load_meta_start_failed; 912 } 913 914 if (sm->sm_magic != SBD_MAGIC) { 915 sbd_swap_meta_start(sm); 916 } 917 918 if ((sm->sm_magic != SBD_MAGIC) || (sbd_calc_sum((uint8_t *)sm, 919 sizeof (*sm) - 1) != sm->sm_chksum)) { 920 ret = SBD_META_CORRUPTED; 921 goto load_meta_start_failed; 922 } 923 924 if (sm->sm_ver_major != SBD_VER_MAJOR) { 925 ret = SBD_NOT_SUPPORTED; 926 goto load_meta_start_failed; 927 } 928 929 sl->sl_total_meta_size = sm->sm_meta_size; 930 sl->sl_meta_size_used = sm->sm_meta_size_used; 931 ret = SBD_SUCCESS; 932 933 load_meta_start_failed: 934 kmem_free(sm, sizeof (*sm)); 935 return (ret); 936 } 937 938 sbd_status_t 939 sbd_write_meta_start(sbd_lu_t *sl, uint64_t meta_size, uint64_t meta_size_used) 940 { 941 sbd_meta_start_t *sm; 942 sbd_status_t ret; 943 944 sm = (sbd_meta_start_t *)kmem_zalloc(sizeof (sbd_meta_start_t), 945 KM_SLEEP); 946 947 sm->sm_magic = SBD_MAGIC; 948 sm->sm_meta_size = meta_size; 949 sm->sm_meta_size_used = meta_size_used; 950 sm->sm_ver_major = SBD_VER_MAJOR; 951 sm->sm_ver_minor = SBD_VER_MINOR; 952 sm->sm_ver_subminor = SBD_VER_SUBMINOR; 953 sm->sm_chksum = sbd_calc_sum((uint8_t *)sm, sizeof (*sm) - 1); 954 955 ret = sbd_write_meta(sl, sl->sl_meta_offset, sizeof (*sm), 956 (uint8_t *)sm); 957 kmem_free(sm, sizeof (*sm)); 958 959 return (ret); 960 } 961 962 sbd_status_t 963 sbd_read_meta_section(sbd_lu_t *sl, sm_section_hdr_t **ppsms, uint16_t sms_id) 964 { 965 sbd_status_t ret; 966 sm_section_hdr_t sms; 967 int alloced = 0; 968 969 mutex_enter(&sl->sl_metadata_lock); 970 if (((*ppsms) == NULL) || ((*ppsms)->sms_offset == 0)) { 971 bzero(&sms, sizeof (sm_section_hdr_t)); 972 sms.sms_id = sms_id; 973 if ((ret = sbd_load_section_hdr(sl, &sms)) != SBD_SUCCESS) { 974 mutex_exit(&sl->sl_metadata_lock); 975 return (ret); 976 } else { 977 if ((*ppsms) == NULL) { 978 *ppsms = (sm_section_hdr_t *)kmem_zalloc( 979 sms.sms_size, KM_SLEEP); 980 alloced = 1; 981 } 982 bcopy(&sms, *ppsms, sizeof (sm_section_hdr_t)); 983 } 984 } 985 986 ret = sbd_read_meta(sl, (*ppsms)->sms_offset, (*ppsms)->sms_size, 987 (uint8_t *)(*ppsms)); 988 if (ret == SBD_SUCCESS) { 989 uint8_t s; 990 if ((*ppsms)->sms_data_order != SMS_DATA_ORDER) 991 sbd_swap_section_hdr(*ppsms); 992 if ((*ppsms)->sms_id != SMS_ID_UNUSED) { 993 s = sbd_calc_section_sum(*ppsms, (*ppsms)->sms_size); 994 if (s != (*ppsms)->sms_chksum) 995 ret = SBD_META_CORRUPTED; 996 } 997 } 998 mutex_exit(&sl->sl_metadata_lock); 999 1000 if ((ret != SBD_SUCCESS) && alloced) 1001 kmem_free(*ppsms, sms.sms_size); 1002 return (ret); 1003 } 1004 1005 sbd_status_t 1006 sbd_load_section_hdr_unbuffered(sbd_lu_t *sl, sm_section_hdr_t *sms) 1007 { 1008 sbd_status_t ret; 1009 1010 /* 1011 * Bypass buffering and re-read the meta data from permanent storage. 1012 */ 1013 if (sl->sl_flags & SL_ZFS_META) { 1014 if ((ret = sbd_open_zfs_meta(sl)) != SBD_SUCCESS) { 1015 return (ret); 1016 } 1017 } 1018 /* Re-get the meta sizes into sl */ 1019 if ((ret = sbd_load_meta_start(sl)) != SBD_SUCCESS) { 1020 return (ret); 1021 } 1022 return (sbd_load_section_hdr(sl, sms)); 1023 } 1024 1025 sbd_status_t 1026 sbd_write_meta_section(sbd_lu_t *sl, sm_section_hdr_t *sms) 1027 { 1028 sm_section_hdr_t t; 1029 uint64_t off, s; 1030 uint64_t unused_start; 1031 sbd_status_t ret; 1032 sbd_status_t write_meta_ret = SBD_SUCCESS; 1033 uint8_t *cb; 1034 int meta_size_changed = 0; 1035 sm_section_hdr_t sms_before_unused = {0}; 1036 1037 mutex_enter(&sl->sl_metadata_lock); 1038 write_meta_section_again: 1039 if (sms->sms_offset) { 1040 /* 1041 * If the section already exists and the size is the 1042 * same as this new data then overwrite in place. If 1043 * the sizes are different then mark the existing as 1044 * unused and look for free space. 1045 */ 1046 ret = sbd_read_meta(sl, sms->sms_offset, sizeof (t), 1047 (uint8_t *)&t); 1048 if (ret != SBD_SUCCESS) { 1049 mutex_exit(&sl->sl_metadata_lock); 1050 return (ret); 1051 } 1052 if (t.sms_data_order != SMS_DATA_ORDER) { 1053 sbd_swap_section_hdr(&t); 1054 } 1055 if (t.sms_id != sms->sms_id) { 1056 mutex_exit(&sl->sl_metadata_lock); 1057 return (SBD_INVALID_ARG); 1058 } 1059 if (t.sms_size == sms->sms_size) { 1060 ret = sbd_write_meta(sl, sms->sms_offset, 1061 sms->sms_size, (uint8_t *)sms); 1062 mutex_exit(&sl->sl_metadata_lock); 1063 return (ret); 1064 } 1065 sms_before_unused = t; 1066 1067 t.sms_id = SMS_ID_UNUSED; 1068 /* 1069 * For unused sections we only use chksum of the header. for 1070 * all other sections, the chksum is for the entire section. 1071 */ 1072 t.sms_chksum = sbd_calc_section_sum(&t, sizeof (t)); 1073 ret = sbd_write_meta(sl, t.sms_offset, sizeof (t), 1074 (uint8_t *)&t); 1075 if (ret != SBD_SUCCESS) { 1076 mutex_exit(&sl->sl_metadata_lock); 1077 return (ret); 1078 } 1079 sms->sms_offset = 0; 1080 } else { 1081 /* Section location is unknown, search for it. */ 1082 t.sms_id = sms->sms_id; 1083 t.sms_data_order = SMS_DATA_ORDER; 1084 ret = sbd_load_section_hdr(sl, &t); 1085 if (ret == SBD_SUCCESS) { 1086 sms->sms_offset = t.sms_offset; 1087 sms->sms_chksum = 1088 sbd_calc_section_sum(sms, sms->sms_size); 1089 goto write_meta_section_again; 1090 } else if (ret != SBD_NOT_FOUND) { 1091 mutex_exit(&sl->sl_metadata_lock); 1092 return (ret); 1093 } 1094 } 1095 1096 /* 1097 * At this point we know that section does not already exist. 1098 * Find space large enough to hold the section or grow meta if 1099 * possible. 1100 */ 1101 unused_start = 0; 1102 s = 0; /* size of space found */ 1103 1104 /* 1105 * Search all sections for unused space of sufficient size. 1106 * The first one found is taken. Contiguous unused sections 1107 * will be combined. 1108 */ 1109 for (off = sl->sl_meta_offset + sizeof (sbd_meta_start_t); 1110 off < sl->sl_meta_size_used; off += t.sms_size) { 1111 ret = sbd_read_meta(sl, off, sizeof (t), (uint8_t *)&t); 1112 if (ret != SBD_SUCCESS) { 1113 mutex_exit(&sl->sl_metadata_lock); 1114 return (ret); 1115 } 1116 if (t.sms_data_order != SMS_DATA_ORDER) 1117 sbd_swap_section_hdr(&t); 1118 if (t.sms_size == 0) { 1119 mutex_exit(&sl->sl_metadata_lock); 1120 return (SBD_META_CORRUPTED); 1121 } 1122 if (t.sms_id == SMS_ID_UNUSED) { 1123 if (unused_start == 0) 1124 unused_start = off; 1125 /* 1126 * Calculate size of the unused space, break out 1127 * if it satisfies the requirement. 1128 */ 1129 s = t.sms_size - unused_start + off; 1130 if ((s == sms->sms_size) || (s >= (sms->sms_size + 1131 sizeof (t)))) { 1132 break; 1133 } else { 1134 s = 0; 1135 } 1136 } else { 1137 unused_start = 0; 1138 } 1139 } 1140 1141 off = (unused_start == 0) ? sl->sl_meta_size_used : unused_start; 1142 /* 1143 * If none found, how much room is at the end? 1144 * See if the data can be expanded. 1145 */ 1146 if (s == 0) { 1147 s = sl->sl_total_meta_size - off; 1148 if (s >= sms->sms_size || !(sl->sl_flags & SL_SHARED_META)) { 1149 s = sms->sms_size; 1150 meta_size_changed = 1; 1151 } else { 1152 s = 0; 1153 } 1154 } 1155 1156 if (s == 0) { 1157 mutex_exit(&sl->sl_metadata_lock); 1158 return (SBD_ALLOC_FAILURE); 1159 } 1160 1161 sms->sms_offset = off; 1162 sms->sms_chksum = sbd_calc_section_sum(sms, sms->sms_size); 1163 /* 1164 * Since we may have to write more than one section (current + 1165 * any unused), use a combined buffer. 1166 */ 1167 cb = kmem_zalloc(s, KM_SLEEP); 1168 bcopy(sms, cb, sms->sms_size); 1169 if (s > sms->sms_size) { 1170 t.sms_offset = off + sms->sms_size; 1171 t.sms_size = s - sms->sms_size; 1172 t.sms_id = SMS_ID_UNUSED; 1173 t.sms_data_order = SMS_DATA_ORDER; 1174 t.sms_chksum = sbd_calc_section_sum(&t, sizeof (t)); 1175 bcopy(&t, cb + sms->sms_size, sizeof (t)); 1176 } 1177 /* 1178 * Two write events & statuses take place. Failure writing the 1179 * meta section takes precedence, can possibly be rolled back, 1180 * & gets reported. Else return status from writing the meta start. 1181 */ 1182 ret = SBD_SUCCESS; /* Set a default, it's not always loaded below. */ 1183 if (meta_size_changed) { 1184 uint64_t old_meta_size; 1185 uint64_t old_sz_used = sl->sl_meta_size_used; /* save a copy */ 1186 old_meta_size = sl->sl_total_meta_size; /* save a copy */ 1187 1188 write_meta_ret = sbd_write_meta(sl, off, s, cb); 1189 if (write_meta_ret == SBD_SUCCESS) { 1190 sl->sl_meta_size_used = off + s; 1191 if (sl->sl_total_meta_size < sl->sl_meta_size_used) { 1192 uint64_t meta_align = 1193 (((uint64_t)1) << 1194 sl->sl_meta_blocksize_shift) - 1; 1195 sl->sl_total_meta_size = 1196 (sl->sl_meta_size_used + meta_align) & 1197 (~meta_align); 1198 } 1199 ret = sbd_write_meta_start(sl, sl->sl_total_meta_size, 1200 sl->sl_meta_size_used); 1201 if (ret != SBD_SUCCESS) { 1202 sl->sl_meta_size_used = old_sz_used; 1203 sl->sl_total_meta_size = old_meta_size; 1204 } 1205 } else { 1206 sl->sl_meta_size_used = old_sz_used; 1207 sl->sl_total_meta_size = old_meta_size; 1208 } 1209 } else { 1210 write_meta_ret = sbd_write_meta(sl, off, s, cb); 1211 } 1212 if ((write_meta_ret != SBD_SUCCESS) && 1213 (sms_before_unused.sms_offset != 0)) { 1214 sm_section_hdr_t new_sms; 1215 sm_section_hdr_t *unused_sms; 1216 /* 1217 * On failure writing the meta section attempt to undo 1218 * the change to unused. 1219 * Re-read the meta data from permanent storage. 1220 * The section id can't exist for undo to be possible. 1221 * Read what should be the entire old section data and 1222 * insure the old data's still present by validating 1223 * against it's old checksum. 1224 */ 1225 new_sms.sms_id = sms->sms_id; 1226 new_sms.sms_data_order = SMS_DATA_ORDER; 1227 if (sbd_load_section_hdr_unbuffered(sl, &new_sms) != 1228 SBD_NOT_FOUND) { 1229 goto done; 1230 } 1231 unused_sms = kmem_zalloc(sms_before_unused.sms_size, KM_SLEEP); 1232 if (sbd_read_meta(sl, sms_before_unused.sms_offset, 1233 sms_before_unused.sms_size, 1234 (uint8_t *)unused_sms) != SBD_SUCCESS) { 1235 goto done; 1236 } 1237 if (unused_sms->sms_data_order != SMS_DATA_ORDER) { 1238 sbd_swap_section_hdr(unused_sms); 1239 } 1240 if (unused_sms->sms_id != SMS_ID_UNUSED) { 1241 goto done; 1242 } 1243 if (unused_sms->sms_offset != sms_before_unused.sms_offset) { 1244 goto done; 1245 } 1246 if (unused_sms->sms_size != sms_before_unused.sms_size) { 1247 goto done; 1248 } 1249 unused_sms->sms_id = sms_before_unused.sms_id; 1250 if (sbd_calc_section_sum(unused_sms, 1251 sizeof (sm_section_hdr_t)) != 1252 sbd_calc_section_sum(&sms_before_unused, 1253 sizeof (sm_section_hdr_t))) { 1254 goto done; 1255 } 1256 unused_sms->sms_chksum = 1257 sbd_calc_section_sum(unused_sms, unused_sms->sms_size); 1258 if (unused_sms->sms_chksum != sms_before_unused.sms_chksum) { 1259 goto done; 1260 } 1261 (void) sbd_write_meta(sl, unused_sms->sms_offset, 1262 sizeof (sm_section_hdr_t), (uint8_t *)unused_sms); 1263 } 1264 done: 1265 mutex_exit(&sl->sl_metadata_lock); 1266 kmem_free(cb, s); 1267 if (write_meta_ret != SBD_SUCCESS) { 1268 return (write_meta_ret); 1269 } 1270 return (ret); 1271 } 1272 1273 sbd_status_t 1274 sbd_write_lu_info(sbd_lu_t *sl) 1275 { 1276 sbd_lu_info_1_1_t *sli; 1277 int s; 1278 uint8_t *p; 1279 char *zvol_name = NULL; 1280 sbd_status_t ret; 1281 1282 mutex_enter(&sl->sl_lock); 1283 1284 s = sl->sl_serial_no_size; 1285 if ((sl->sl_flags & (SL_SHARED_META | SL_ZFS_META)) == 0) { 1286 if (sl->sl_data_filename) { 1287 s += strlen(sl->sl_data_filename) + 1; 1288 } 1289 } 1290 if (sl->sl_flags & SL_ZFS_META) { 1291 zvol_name = sbd_get_zvol_name(sl); 1292 s += strlen(zvol_name) + 1; 1293 } 1294 if (sl->sl_alias) { 1295 s += strlen(sl->sl_alias) + 1; 1296 } 1297 if (sl->sl_mgmt_url) { 1298 s += strlen(sl->sl_mgmt_url) + 1; 1299 } 1300 sli = (sbd_lu_info_1_1_t *)kmem_zalloc(sizeof (*sli) + s, KM_SLEEP); 1301 p = sli->sli_buf; 1302 if ((sl->sl_flags & (SL_SHARED_META | SL_ZFS_META)) == 0) { 1303 sli->sli_flags |= SLI_SEPARATE_META; 1304 (void) strcpy((char *)p, sl->sl_data_filename); 1305 sli->sli_data_fname_offset = 1306 (uintptr_t)p - (uintptr_t)sli->sli_buf; 1307 sli->sli_flags |= SLI_DATA_FNAME_VALID; 1308 p += strlen(sl->sl_data_filename) + 1; 1309 } 1310 if (sl->sl_flags & SL_ZFS_META) { 1311 (void) strcpy((char *)p, zvol_name); 1312 sli->sli_meta_fname_offset = 1313 (uintptr_t)p - (uintptr_t)sli->sli_buf; 1314 sli->sli_flags |= SLI_META_FNAME_VALID | SLI_ZFS_META; 1315 p += strlen(zvol_name) + 1; 1316 kmem_free(zvol_name, strlen(zvol_name) + 1); 1317 zvol_name = NULL; 1318 } 1319 if (sl->sl_alias) { 1320 (void) strcpy((char *)p, sl->sl_alias); 1321 sli->sli_alias_offset = 1322 (uintptr_t)p - (uintptr_t)sli->sli_buf; 1323 sli->sli_flags |= SLI_ALIAS_VALID; 1324 p += strlen(sl->sl_alias) + 1; 1325 } 1326 if (sl->sl_mgmt_url) { 1327 (void) strcpy((char *)p, sl->sl_mgmt_url); 1328 sli->sli_mgmt_url_offset = 1329 (uintptr_t)p - (uintptr_t)sli->sli_buf; 1330 sli->sli_flags |= SLI_MGMT_URL_VALID; 1331 p += strlen(sl->sl_mgmt_url) + 1; 1332 } 1333 if (sl->sl_flags & SL_WRITE_PROTECTED) { 1334 sli->sli_flags |= SLI_WRITE_PROTECTED; 1335 } 1336 if (sl->sl_flags & SL_SAVED_WRITE_CACHE_DISABLE) { 1337 sli->sli_flags |= SLI_WRITEBACK_CACHE_DISABLE; 1338 } 1339 if (sl->sl_flags & SL_VID_VALID) { 1340 bcopy(sl->sl_vendor_id, sli->sli_vid, 8); 1341 sli->sli_flags |= SLI_VID_VALID; 1342 } 1343 if (sl->sl_flags & SL_PID_VALID) { 1344 bcopy(sl->sl_product_id, sli->sli_pid, 16); 1345 sli->sli_flags |= SLI_PID_VALID; 1346 } 1347 if (sl->sl_flags & SL_REV_VALID) { 1348 bcopy(sl->sl_revision, sli->sli_rev, 4); 1349 sli->sli_flags |= SLI_REV_VALID; 1350 } 1351 if (sl->sl_serial_no_size) { 1352 bcopy(sl->sl_serial_no, p, sl->sl_serial_no_size); 1353 sli->sli_serial_size = sl->sl_serial_no_size; 1354 sli->sli_serial_offset = 1355 (uintptr_t)p - (uintptr_t)sli->sli_buf; 1356 sli->sli_flags |= SLI_SERIAL_VALID; 1357 p += sli->sli_serial_size; 1358 } 1359 sli->sli_lu_size = sl->sl_lu_size; 1360 sli->sli_data_blocksize_shift = sl->sl_data_blocksize_shift; 1361 sli->sli_data_order = SMS_DATA_ORDER; 1362 bcopy(sl->sl_device_id, sli->sli_device_id, 20); 1363 1364 sli->sli_sms_header.sms_size = sizeof (*sli) + s; 1365 sli->sli_sms_header.sms_id = SMS_ID_LU_INFO_1_1; 1366 sli->sli_sms_header.sms_data_order = SMS_DATA_ORDER; 1367 1368 mutex_exit(&sl->sl_lock); 1369 ret = sbd_write_meta_section(sl, (sm_section_hdr_t *)sli); 1370 kmem_free(sli, sizeof (*sli) + s); 1371 return (ret); 1372 } 1373 1374 int 1375 sbd_populate_and_register_lu(sbd_lu_t *sl, uint32_t *err_ret) 1376 { 1377 stmf_lu_t *lu = sl->sl_lu; 1378 stmf_status_t ret; 1379 1380 lu->lu_id = (scsi_devid_desc_t *)sl->sl_device_id; 1381 if (sl->sl_alias) { 1382 lu->lu_alias = sl->sl_alias; 1383 } else { 1384 lu->lu_alias = sl->sl_name; 1385 } 1386 if (sl->sl_access_state == SBD_LU_STANDBY) { 1387 /* call set access state */ 1388 ret = stmf_set_lu_access(lu, STMF_LU_STANDBY); 1389 if (ret != STMF_SUCCESS) { 1390 *err_ret = SBD_RET_ACCESS_STATE_FAILED; 1391 return (EIO); 1392 } 1393 } 1394 /* set proxy_reg_cb_arg to meta filename */ 1395 if (sl->sl_meta_filename) { 1396 lu->lu_proxy_reg_arg = sl->sl_meta_filename; 1397 lu->lu_proxy_reg_arg_len = strlen(sl->sl_meta_filename) + 1; 1398 } else { 1399 lu->lu_proxy_reg_arg = sl->sl_data_filename; 1400 lu->lu_proxy_reg_arg_len = strlen(sl->sl_data_filename) + 1; 1401 } 1402 lu->lu_lp = sbd_lp; 1403 lu->lu_task_alloc = sbd_task_alloc; 1404 lu->lu_new_task = sbd_new_task; 1405 lu->lu_dbuf_xfer_done = sbd_dbuf_xfer_done; 1406 lu->lu_send_status_done = sbd_send_status_done; 1407 lu->lu_task_free = sbd_task_free; 1408 lu->lu_abort = sbd_abort; 1409 lu->lu_ctl = sbd_ctl; 1410 lu->lu_info = sbd_info; 1411 sl->sl_state = STMF_STATE_OFFLINE; 1412 1413 if ((ret = stmf_register_lu(lu)) != STMF_SUCCESS) { 1414 stmf_trace(0, "Failed to register with framework, ret=%llx", 1415 ret); 1416 if (ret == STMF_ALREADY) { 1417 *err_ret = SBD_RET_GUID_ALREADY_REGISTERED; 1418 } 1419 return (EIO); 1420 } 1421 1422 *err_ret = 0; 1423 return (0); 1424 } 1425 1426 int 1427 sbd_open_data_file(sbd_lu_t *sl, uint32_t *err_ret, int lu_size_valid, 1428 int vp_valid, int keep_open) 1429 { 1430 int ret; 1431 int flag; 1432 ulong_t nbits; 1433 uint64_t supported_size; 1434 vattr_t vattr; 1435 enum vtype vt; 1436 1437 mutex_enter(&sl->sl_lock); 1438 if (vp_valid) { 1439 goto odf_over_open; 1440 } 1441 if (sl->sl_data_filename[0] != '/') { 1442 *err_ret = SBD_RET_DATA_PATH_NOT_ABSOLUTE; 1443 mutex_exit(&sl->sl_lock); 1444 return (EINVAL); 1445 } 1446 if ((ret = lookupname(sl->sl_data_filename, UIO_SYSSPACE, FOLLOW, 1447 NULLVPP, &sl->sl_data_vp)) != 0) { 1448 *err_ret = SBD_RET_DATA_FILE_LOOKUP_FAILED; 1449 mutex_exit(&sl->sl_lock); 1450 return (ret); 1451 } 1452 sl->sl_data_vtype = vt = sl->sl_data_vp->v_type; 1453 VN_RELE(sl->sl_data_vp); 1454 if ((vt != VREG) && (vt != VCHR) && (vt != VBLK)) { 1455 *err_ret = SBD_RET_WRONG_DATA_FILE_TYPE; 1456 mutex_exit(&sl->sl_lock); 1457 return (EINVAL); 1458 } 1459 if (sl->sl_flags & SL_WRITE_PROTECTED) { 1460 flag = FREAD | FOFFMAX; 1461 } else { 1462 flag = FREAD | FWRITE | FOFFMAX | FEXCL; 1463 } 1464 if ((ret = vn_open(sl->sl_data_filename, UIO_SYSSPACE, flag, 0, 1465 &sl->sl_data_vp, 0, 0)) != 0) { 1466 *err_ret = SBD_RET_DATA_FILE_OPEN_FAILED; 1467 mutex_exit(&sl->sl_lock); 1468 return (ret); 1469 } 1470 odf_over_open: 1471 vattr.va_mask = AT_SIZE; 1472 if ((ret = VOP_GETATTR(sl->sl_data_vp, &vattr, 0, CRED(), NULL)) != 0) { 1473 *err_ret = SBD_RET_DATA_FILE_GETATTR_FAILED; 1474 goto odf_close_data_and_exit; 1475 } 1476 if ((vt != VREG) && (vattr.va_size == 0)) { 1477 /* 1478 * Its a zero byte block or char device. This cannot be 1479 * a raw disk. 1480 */ 1481 *err_ret = SBD_RET_WRONG_DATA_FILE_TYPE; 1482 ret = EINVAL; 1483 goto odf_close_data_and_exit; 1484 } 1485 /* sl_data_readable size includes any metadata. */ 1486 sl->sl_data_readable_size = vattr.va_size; 1487 if (VOP_PATHCONF(sl->sl_data_vp, _PC_FILESIZEBITS, &nbits, 1488 CRED(), NULL) != 0) { 1489 nbits = 0; 1490 } 1491 /* nbits cannot be greater than 64 */ 1492 sl->sl_data_fs_nbits = (uint8_t)nbits; 1493 if (lu_size_valid) { 1494 sl->sl_total_data_size = sl->sl_lu_size; 1495 if (sl->sl_flags & SL_SHARED_META) { 1496 sl->sl_total_data_size += SHARED_META_DATA_SIZE; 1497 } 1498 if ((nbits > 0) && (nbits < 64)) { 1499 /* 1500 * The expression below is correct only if nbits is 1501 * positive and less than 64. 1502 */ 1503 supported_size = (((uint64_t)1) << nbits) - 1; 1504 if (sl->sl_total_data_size > supported_size) { 1505 *err_ret = SBD_RET_SIZE_NOT_SUPPORTED_BY_FS; 1506 ret = EINVAL; 1507 goto odf_close_data_and_exit; 1508 } 1509 } 1510 } else { 1511 sl->sl_total_data_size = vattr.va_size; 1512 if (sl->sl_flags & SL_SHARED_META) { 1513 if (vattr.va_size > SHARED_META_DATA_SIZE) { 1514 sl->sl_lu_size = vattr.va_size - 1515 SHARED_META_DATA_SIZE; 1516 } else { 1517 *err_ret = SBD_RET_FILE_SIZE_ERROR; 1518 ret = EINVAL; 1519 goto odf_close_data_and_exit; 1520 } 1521 } else { 1522 sl->sl_lu_size = vattr.va_size; 1523 } 1524 } 1525 if (sl->sl_lu_size < SBD_MIN_LU_SIZE) { 1526 *err_ret = SBD_RET_FILE_SIZE_ERROR; 1527 ret = EINVAL; 1528 goto odf_close_data_and_exit; 1529 } 1530 if (sl->sl_lu_size & 1531 ((((uint64_t)1) << sl->sl_data_blocksize_shift) - 1)) { 1532 *err_ret = SBD_RET_FILE_ALIGN_ERROR; 1533 ret = EINVAL; 1534 goto odf_close_data_and_exit; 1535 } 1536 sl->sl_flags |= SL_MEDIA_LOADED; 1537 mutex_exit(&sl->sl_lock); 1538 return (0); 1539 1540 odf_close_data_and_exit: 1541 if (!keep_open) { 1542 (void) VOP_CLOSE(sl->sl_data_vp, flag, 1, 0, CRED(), NULL); 1543 VN_RELE(sl->sl_data_vp); 1544 } 1545 mutex_exit(&sl->sl_lock); 1546 return (ret); 1547 } 1548 1549 void 1550 sbd_close_lu(sbd_lu_t *sl) 1551 { 1552 int flag; 1553 1554 if (((sl->sl_flags & SL_SHARED_META) == 0) && 1555 (sl->sl_flags & SL_META_OPENED)) { 1556 if (sl->sl_flags & SL_ZFS_META) { 1557 rw_destroy(&sl->sl_zfs_meta_lock); 1558 if (sl->sl_zfs_meta) { 1559 kmem_free(sl->sl_zfs_meta, ZAP_MAXVALUELEN / 2); 1560 sl->sl_zfs_meta = NULL; 1561 } 1562 } else { 1563 flag = FREAD | FWRITE | FOFFMAX | FEXCL; 1564 (void) VOP_CLOSE(sl->sl_meta_vp, flag, 1, 0, 1565 CRED(), NULL); 1566 VN_RELE(sl->sl_meta_vp); 1567 } 1568 sl->sl_flags &= ~SL_META_OPENED; 1569 } 1570 if (sl->sl_flags & SL_MEDIA_LOADED) { 1571 if (sl->sl_flags & SL_WRITE_PROTECTED) { 1572 flag = FREAD | FOFFMAX; 1573 } else { 1574 flag = FREAD | FWRITE | FOFFMAX | FEXCL; 1575 } 1576 (void) VOP_CLOSE(sl->sl_data_vp, flag, 1, 0, CRED(), NULL); 1577 VN_RELE(sl->sl_data_vp); 1578 sl->sl_flags &= ~SL_MEDIA_LOADED; 1579 if (sl->sl_flags & SL_SHARED_META) { 1580 sl->sl_flags &= ~SL_META_OPENED; 1581 } 1582 } 1583 } 1584 1585 int 1586 sbd_set_lu_standby(sbd_set_lu_standby_t *stlu, uint32_t *err_ret) 1587 { 1588 sbd_lu_t *sl; 1589 sbd_status_t sret; 1590 stmf_status_t stret; 1591 1592 sret = sbd_find_and_lock_lu(stlu->stlu_guid, NULL, 1593 SL_OP_MODIFY_LU, &sl); 1594 if (sret != SBD_SUCCESS) { 1595 if (sret == SBD_BUSY) { 1596 *err_ret = SBD_RET_LU_BUSY; 1597 return (EBUSY); 1598 } else if (sret == SBD_NOT_FOUND) { 1599 *err_ret = SBD_RET_NOT_FOUND; 1600 return (ENOENT); 1601 } 1602 *err_ret = SBD_RET_ACCESS_STATE_FAILED; 1603 return (EIO); 1604 } 1605 1606 sl->sl_access_state = SBD_LU_TRANSITION_TO_STANDBY; 1607 stret = stmf_set_lu_access((stmf_lu_t *)sl->sl_lu, STMF_LU_STANDBY); 1608 if (stret != STMF_SUCCESS) { 1609 sl->sl_trans_op = SL_OP_NONE; 1610 *err_ret = SBD_RET_ACCESS_STATE_FAILED; 1611 sl->sl_access_state = SBD_LU_TRANSITION_TO_STANDBY; 1612 return (EIO); 1613 } 1614 1615 /* 1616 * acquire the writer lock here to ensure we're not pulling 1617 * the rug from the vn_rdwr to the backing store 1618 */ 1619 rw_enter(&sl->sl_access_state_lock, RW_WRITER); 1620 sbd_close_lu(sl); 1621 rw_exit(&sl->sl_access_state_lock); 1622 1623 sl->sl_trans_op = SL_OP_NONE; 1624 return (0); 1625 } 1626 1627 int 1628 sbd_close_delete_lu(sbd_lu_t *sl, int ret) 1629 { 1630 1631 /* 1632 * acquire the writer lock here to ensure we're not pulling 1633 * the rug from the vn_rdwr to the backing store 1634 */ 1635 rw_enter(&sl->sl_access_state_lock, RW_WRITER); 1636 sbd_close_lu(sl); 1637 rw_exit(&sl->sl_access_state_lock); 1638 1639 if (sl->sl_flags & SL_LINKED) 1640 sbd_unlink_lu(sl); 1641 mutex_destroy(&sl->sl_metadata_lock); 1642 mutex_destroy(&sl->sl_lock); 1643 rw_destroy(&sl->sl_pgr->pgr_lock); 1644 rw_destroy(&sl->sl_access_state_lock); 1645 if (sl->sl_serial_no_alloc_size) { 1646 kmem_free(sl->sl_serial_no, sl->sl_serial_no_alloc_size); 1647 } 1648 if (sl->sl_data_fname_alloc_size) { 1649 kmem_free(sl->sl_data_filename, sl->sl_data_fname_alloc_size); 1650 } 1651 if (sl->sl_alias_alloc_size) { 1652 kmem_free(sl->sl_alias, sl->sl_alias_alloc_size); 1653 } 1654 if (sl->sl_mgmt_url_alloc_size) { 1655 kmem_free(sl->sl_mgmt_url, sl->sl_mgmt_url_alloc_size); 1656 } 1657 stmf_free(sl->sl_lu); 1658 return (ret); 1659 } 1660 1661 int 1662 sbd_create_register_lu(sbd_create_and_reg_lu_t *slu, int struct_sz, 1663 uint32_t *err_ret) 1664 { 1665 char *namebuf; 1666 sbd_lu_t *sl; 1667 stmf_lu_t *lu; 1668 sbd_status_t sret; 1669 char *p; 1670 int sz; 1671 int alloc_sz; 1672 int ret = EIO; 1673 int flag; 1674 int wcd = 0; 1675 uint32_t hid = 0; 1676 enum vtype vt; 1677 1678 sz = struct_sz - sizeof (sbd_create_and_reg_lu_t) + 8 + 1; 1679 1680 *err_ret = 0; 1681 1682 /* Lets validate various offsets */ 1683 if (((slu->slu_meta_fname_valid) && 1684 (slu->slu_meta_fname_off >= sz)) || 1685 (slu->slu_data_fname_off >= sz) || 1686 ((slu->slu_alias_valid) && 1687 (slu->slu_alias_off >= sz)) || 1688 ((slu->slu_mgmt_url_valid) && 1689 (slu->slu_mgmt_url_off >= sz)) || 1690 ((slu->slu_serial_valid) && 1691 ((slu->slu_serial_off + slu->slu_serial_size) >= sz))) { 1692 return (EINVAL); 1693 } 1694 1695 namebuf = kmem_zalloc(sz, KM_SLEEP); 1696 bcopy(slu->slu_buf, namebuf, sz - 1); 1697 namebuf[sz - 1] = 0; 1698 1699 alloc_sz = sizeof (sbd_lu_t) + sizeof (sbd_pgr_t); 1700 if (slu->slu_meta_fname_valid) { 1701 alloc_sz += strlen(namebuf + slu->slu_meta_fname_off) + 1; 1702 } 1703 alloc_sz += strlen(namebuf + slu->slu_data_fname_off) + 1; 1704 if (slu->slu_alias_valid) { 1705 alloc_sz += strlen(namebuf + slu->slu_alias_off) + 1; 1706 } 1707 if (slu->slu_mgmt_url_valid) { 1708 alloc_sz += strlen(namebuf + slu->slu_mgmt_url_off) + 1; 1709 } 1710 if (slu->slu_serial_valid) { 1711 alloc_sz += slu->slu_serial_size; 1712 } 1713 1714 lu = (stmf_lu_t *)stmf_alloc(STMF_STRUCT_STMF_LU, alloc_sz, 0); 1715 if (lu == NULL) { 1716 kmem_free(namebuf, sz); 1717 return (ENOMEM); 1718 } 1719 sl = (sbd_lu_t *)lu->lu_provider_private; 1720 bzero(sl, alloc_sz); 1721 sl->sl_lu = lu; 1722 sl->sl_alloc_size = alloc_sz; 1723 sl->sl_pgr = (sbd_pgr_t *)(sl + 1); 1724 rw_init(&sl->sl_pgr->pgr_lock, NULL, RW_DRIVER, NULL); 1725 mutex_init(&sl->sl_lock, NULL, MUTEX_DRIVER, NULL); 1726 mutex_init(&sl->sl_metadata_lock, NULL, MUTEX_DRIVER, NULL); 1727 rw_init(&sl->sl_access_state_lock, NULL, RW_DRIVER, NULL); 1728 p = ((char *)sl) + sizeof (sbd_lu_t) + sizeof (sbd_pgr_t); 1729 sl->sl_data_filename = p; 1730 (void) strcpy(sl->sl_data_filename, namebuf + slu->slu_data_fname_off); 1731 p += strlen(sl->sl_data_filename) + 1; 1732 sl->sl_meta_offset = SBD_META_OFFSET; 1733 sl->sl_access_state = SBD_LU_ACTIVE; 1734 if (slu->slu_meta_fname_valid) { 1735 sl->sl_alias = sl->sl_name = sl->sl_meta_filename = p; 1736 (void) strcpy(sl->sl_meta_filename, namebuf + 1737 slu->slu_meta_fname_off); 1738 p += strlen(sl->sl_meta_filename) + 1; 1739 } else { 1740 sl->sl_alias = sl->sl_name = sl->sl_data_filename; 1741 if (sbd_is_zvol(sl->sl_data_filename)) { 1742 sl->sl_flags |= SL_ZFS_META; 1743 sl->sl_meta_offset = 0; 1744 } else { 1745 sl->sl_flags |= SL_SHARED_META; 1746 sl->sl_data_offset = SHARED_META_DATA_SIZE; 1747 sl->sl_total_meta_size = SHARED_META_DATA_SIZE; 1748 sl->sl_meta_size_used = 0; 1749 } 1750 } 1751 if (slu->slu_alias_valid) { 1752 sl->sl_alias = p; 1753 (void) strcpy(p, namebuf + slu->slu_alias_off); 1754 p += strlen(sl->sl_alias) + 1; 1755 } 1756 if (slu->slu_mgmt_url_valid) { 1757 sl->sl_mgmt_url = p; 1758 (void) strcpy(p, namebuf + slu->slu_mgmt_url_off); 1759 p += strlen(sl->sl_mgmt_url) + 1; 1760 } 1761 if (slu->slu_serial_valid) { 1762 sl->sl_serial_no = (uint8_t *)p; 1763 bcopy(namebuf + slu->slu_serial_off, sl->sl_serial_no, 1764 slu->slu_serial_size); 1765 sl->sl_serial_no_size = slu->slu_serial_size; 1766 p += slu->slu_serial_size; 1767 } 1768 kmem_free(namebuf, sz); 1769 if (slu->slu_vid_valid) { 1770 bcopy(slu->slu_vid, sl->sl_vendor_id, 8); 1771 sl->sl_flags |= SL_VID_VALID; 1772 } 1773 if (slu->slu_pid_valid) { 1774 bcopy(slu->slu_pid, sl->sl_product_id, 16); 1775 sl->sl_flags |= SL_PID_VALID; 1776 } 1777 if (slu->slu_rev_valid) { 1778 bcopy(slu->slu_rev, sl->sl_revision, 4); 1779 sl->sl_flags |= SL_REV_VALID; 1780 } 1781 if (slu->slu_write_protected) { 1782 sl->sl_flags |= SL_WRITE_PROTECTED; 1783 } 1784 if (slu->slu_writeback_cache_disable) { 1785 sl->sl_flags |= SL_WRITEBACK_CACHE_DISABLE | 1786 SL_SAVED_WRITE_CACHE_DISABLE; 1787 } 1788 1789 if (slu->slu_blksize_valid) { 1790 if ((slu->slu_blksize & (slu->slu_blksize - 1)) || 1791 (slu->slu_blksize > (32 * 1024)) || 1792 (slu->slu_blksize == 0)) { 1793 *err_ret = SBD_RET_INVALID_BLKSIZE; 1794 ret = EINVAL; 1795 goto scm_err_out; 1796 } 1797 while ((1 << sl->sl_data_blocksize_shift) != slu->slu_blksize) { 1798 sl->sl_data_blocksize_shift++; 1799 } 1800 } else { 1801 sl->sl_data_blocksize_shift = 9; /* 512 by default */ 1802 slu->slu_blksize = 512; 1803 } 1804 1805 /* Now lets start creating meta */ 1806 sl->sl_trans_op = SL_OP_CREATE_REGISTER_LU; 1807 if (sbd_link_lu(sl) != SBD_SUCCESS) { 1808 *err_ret = SBD_RET_FILE_ALREADY_REGISTERED; 1809 ret = EALREADY; 1810 goto scm_err_out; 1811 } 1812 1813 /* 1st focus on the data store */ 1814 if (slu->slu_lu_size_valid) { 1815 sl->sl_lu_size = slu->slu_lu_size; 1816 } 1817 ret = sbd_open_data_file(sl, err_ret, slu->slu_lu_size_valid, 0, 0); 1818 slu->slu_ret_filesize_nbits = sl->sl_data_fs_nbits; 1819 slu->slu_lu_size = sl->sl_lu_size; 1820 if (ret) { 1821 goto scm_err_out; 1822 } 1823 1824 /* 1825 * set write cache disable on the device 1826 * if it fails, we'll support it using sync/flush 1827 */ 1828 if (slu->slu_writeback_cache_disable) { 1829 (void) sbd_wcd_set(1, sl); 1830 wcd = 1; 1831 /* 1832 * Attempt to set it to enable, if that fails and it was explicitly set 1833 * return an error, otherwise get the current setting and use that 1834 */ 1835 } else { 1836 sret = sbd_wcd_set(0, sl); 1837 if (slu->slu_writeback_cache_disable_valid && 1838 sret != SBD_SUCCESS) { 1839 *err_ret = SBD_RET_WRITE_CACHE_SET_FAILED; 1840 ret = EFAULT; 1841 goto scm_err_out; 1842 } 1843 if (sret != SBD_SUCCESS) { 1844 sbd_wcd_get(&wcd, sl); 1845 } 1846 } 1847 1848 if (wcd) { 1849 sl->sl_flags |= SL_WRITEBACK_CACHE_DISABLE | 1850 SL_SAVED_WRITE_CACHE_DISABLE; 1851 } 1852 1853 if (sl->sl_flags & SL_SHARED_META) { 1854 goto over_meta_open; 1855 } 1856 if (sl->sl_flags & SL_ZFS_META) { 1857 if (sbd_create_zfs_meta_object(sl) != SBD_SUCCESS) { 1858 *err_ret = SBD_RET_ZFS_META_CREATE_FAILED; 1859 ret = ENOMEM; 1860 goto scm_err_out; 1861 } 1862 sl->sl_meta_blocksize_shift = 0; 1863 goto over_meta_create; 1864 } 1865 if ((ret = lookupname(sl->sl_meta_filename, UIO_SYSSPACE, FOLLOW, 1866 NULLVPP, &sl->sl_meta_vp)) != 0) { 1867 *err_ret = SBD_RET_META_FILE_LOOKUP_FAILED; 1868 goto scm_err_out; 1869 } 1870 sl->sl_meta_vtype = vt = sl->sl_meta_vp->v_type; 1871 VN_RELE(sl->sl_meta_vp); 1872 if ((vt != VREG) && (vt != VCHR) && (vt != VBLK)) { 1873 *err_ret = SBD_RET_WRONG_META_FILE_TYPE; 1874 ret = EINVAL; 1875 goto scm_err_out; 1876 } 1877 if (vt == VREG) { 1878 sl->sl_meta_blocksize_shift = 0; 1879 } else { 1880 sl->sl_meta_blocksize_shift = 9; 1881 } 1882 flag = FREAD | FWRITE | FOFFMAX | FEXCL; 1883 if ((ret = vn_open(sl->sl_meta_filename, UIO_SYSSPACE, flag, 0, 1884 &sl->sl_meta_vp, 0, 0)) != 0) { 1885 *err_ret = SBD_RET_META_FILE_OPEN_FAILED; 1886 goto scm_err_out; 1887 } 1888 over_meta_create: 1889 sl->sl_total_meta_size = sl->sl_meta_offset + sizeof (sbd_meta_start_t); 1890 sl->sl_total_meta_size += 1891 (((uint64_t)1) << sl->sl_meta_blocksize_shift) - 1; 1892 sl->sl_total_meta_size &= 1893 ~((((uint64_t)1) << sl->sl_meta_blocksize_shift) - 1); 1894 sl->sl_meta_size_used = 0; 1895 over_meta_open: 1896 sl->sl_flags |= SL_META_OPENED; 1897 1898 sl->sl_device_id[3] = 16; 1899 if (slu->slu_guid_valid) { 1900 sl->sl_device_id[0] = 0xf1; 1901 sl->sl_device_id[1] = 3; 1902 sl->sl_device_id[2] = 0; 1903 bcopy(slu->slu_guid, sl->sl_device_id + 4, 16); 1904 } else { 1905 if (slu->slu_host_id_valid) 1906 hid = slu->slu_host_id; 1907 if (!slu->slu_company_id_valid) 1908 slu->slu_company_id = COMPANY_ID_SUN; 1909 if (stmf_scsilib_uniq_lu_id2(slu->slu_company_id, hid, 1910 (scsi_devid_desc_t *)&sl->sl_device_id[0]) != 1911 STMF_SUCCESS) { 1912 *err_ret = SBD_RET_META_CREATION_FAILED; 1913 ret = EIO; 1914 goto scm_err_out; 1915 } 1916 bcopy(sl->sl_device_id + 4, slu->slu_guid, 16); 1917 } 1918 1919 /* Lets create the meta now */ 1920 mutex_enter(&sl->sl_metadata_lock); 1921 if (sbd_write_meta_start(sl, sl->sl_total_meta_size, 1922 sizeof (sbd_meta_start_t)) != SBD_SUCCESS) { 1923 mutex_exit(&sl->sl_metadata_lock); 1924 *err_ret = SBD_RET_META_CREATION_FAILED; 1925 ret = EIO; 1926 goto scm_err_out; 1927 } 1928 mutex_exit(&sl->sl_metadata_lock); 1929 sl->sl_meta_size_used = sl->sl_meta_offset + sizeof (sbd_meta_start_t); 1930 1931 if (sbd_write_lu_info(sl) != SBD_SUCCESS) { 1932 *err_ret = SBD_RET_META_CREATION_FAILED; 1933 ret = EIO; 1934 goto scm_err_out; 1935 } 1936 1937 if (sbd_pgr_meta_init(sl) != SBD_SUCCESS) { 1938 *err_ret = SBD_RET_META_CREATION_FAILED; 1939 ret = EIO; 1940 goto scm_err_out; 1941 } 1942 1943 ret = sbd_populate_and_register_lu(sl, err_ret); 1944 if (ret) { 1945 goto scm_err_out; 1946 } 1947 1948 sl->sl_trans_op = SL_OP_NONE; 1949 atomic_add_32(&sbd_lu_count, 1); 1950 return (0); 1951 1952 scm_err_out: 1953 return (sbd_close_delete_lu(sl, ret)); 1954 } 1955 1956 stmf_status_t 1957 sbd_proxy_msg(uint8_t *luid, void *proxy_arg, uint32_t proxy_arg_len, 1958 uint32_t type) 1959 { 1960 switch (type) { 1961 case STMF_MSG_LU_ACTIVE: 1962 return (sbd_proxy_reg_lu(luid, proxy_arg, 1963 proxy_arg_len)); 1964 case STMF_MSG_LU_REGISTER: 1965 return (sbd_proxy_reg_lu(luid, proxy_arg, 1966 proxy_arg_len)); 1967 case STMF_MSG_LU_DEREGISTER: 1968 return (sbd_proxy_dereg_lu(luid, proxy_arg, 1969 proxy_arg_len)); 1970 default: 1971 return (STMF_INVALID_ARG); 1972 } 1973 } 1974 1975 1976 /* 1977 * register a standby logical unit 1978 * proxy_reg_arg contains the meta filename 1979 */ 1980 stmf_status_t 1981 sbd_proxy_reg_lu(uint8_t *luid, void *proxy_reg_arg, uint32_t proxy_reg_arg_len) 1982 { 1983 sbd_lu_t *sl; 1984 sbd_status_t sret; 1985 sbd_create_standby_lu_t *stlu; 1986 int alloc_sz; 1987 uint32_t err_ret = 0; 1988 stmf_status_t stret = STMF_SUCCESS; 1989 1990 if (luid == NULL) { 1991 return (STMF_INVALID_ARG); 1992 } 1993 1994 do { 1995 sret = sbd_find_and_lock_lu(luid, NULL, SL_OP_MODIFY_LU, &sl); 1996 } while (sret == SBD_BUSY); 1997 1998 if (sret == SBD_NOT_FOUND) { 1999 alloc_sz = sizeof (*stlu) + proxy_reg_arg_len - 8; 2000 stlu = (sbd_create_standby_lu_t *)kmem_zalloc(alloc_sz, 2001 KM_SLEEP); 2002 bcopy(luid, stlu->stlu_guid, 16); 2003 if (proxy_reg_arg_len) { 2004 bcopy(proxy_reg_arg, stlu->stlu_meta_fname, 2005 proxy_reg_arg_len); 2006 stlu->stlu_meta_fname_size = proxy_reg_arg_len; 2007 } 2008 if (sbd_create_standby_lu(stlu, &err_ret) != 0) { 2009 cmn_err(CE_WARN, 2010 "Unable to create standby logical unit for %s", 2011 stlu->stlu_meta_fname); 2012 stret = STMF_FAILURE; 2013 } 2014 kmem_free(stlu, alloc_sz); 2015 return (stret); 2016 } else if (sret == SBD_SUCCESS) { 2017 /* 2018 * if the lu is already registered, then the lu should now 2019 * be in standby mode 2020 */ 2021 sbd_it_data_t *it; 2022 if (sl->sl_access_state != SBD_LU_STANDBY) { 2023 mutex_enter(&sl->sl_lock); 2024 sl->sl_access_state = SBD_LU_STANDBY; 2025 for (it = sl->sl_it_list; it != NULL; 2026 it = it->sbd_it_next) { 2027 it->sbd_it_ua_conditions |= 2028 SBD_UA_ASYMMETRIC_ACCESS_CHANGED; 2029 it->sbd_it_flags &= 2030 ~SBD_IT_HAS_SCSI2_RESERVATION; 2031 sl->sl_flags &= ~SL_LU_HAS_SCSI2_RESERVATION; 2032 } 2033 mutex_exit(&sl->sl_lock); 2034 sbd_pgr_reset(sl); 2035 } 2036 sl->sl_trans_op = SL_OP_NONE; 2037 } else { 2038 cmn_err(CE_WARN, "could not find and lock logical unit"); 2039 stret = STMF_FAILURE; 2040 } 2041 out: 2042 return (stret); 2043 } 2044 2045 /* ARGSUSED */ 2046 stmf_status_t 2047 sbd_proxy_dereg_lu(uint8_t *luid, void *proxy_reg_arg, 2048 uint32_t proxy_reg_arg_len) 2049 { 2050 sbd_delete_lu_t dlu = {0}; 2051 uint32_t err_ret; 2052 2053 if (luid == NULL) { 2054 cmn_err(CE_WARN, "de-register lu request had null luid"); 2055 return (STMF_INVALID_ARG); 2056 } 2057 2058 bcopy(luid, &dlu.dlu_guid, 16); 2059 2060 if (sbd_delete_lu(&dlu, (int)sizeof (dlu), &err_ret) != 0) { 2061 cmn_err(CE_WARN, "failed to delete de-register lu request"); 2062 return (STMF_FAILURE); 2063 } 2064 2065 return (STMF_SUCCESS); 2066 } 2067 2068 int 2069 sbd_create_standby_lu(sbd_create_standby_lu_t *slu, uint32_t *err_ret) 2070 { 2071 sbd_lu_t *sl; 2072 stmf_lu_t *lu; 2073 int ret = EIO; 2074 int alloc_sz; 2075 2076 alloc_sz = sizeof (sbd_lu_t) + sizeof (sbd_pgr_t) + 2077 slu->stlu_meta_fname_size; 2078 lu = (stmf_lu_t *)stmf_alloc(STMF_STRUCT_STMF_LU, alloc_sz, 0); 2079 if (lu == NULL) { 2080 return (ENOMEM); 2081 } 2082 sl = (sbd_lu_t *)lu->lu_provider_private; 2083 bzero(sl, alloc_sz); 2084 sl->sl_lu = lu; 2085 sl->sl_alloc_size = alloc_sz; 2086 2087 sl->sl_pgr = (sbd_pgr_t *)(sl + 1); 2088 sl->sl_meta_filename = ((char *)sl) + sizeof (sbd_lu_t) + 2089 sizeof (sbd_pgr_t); 2090 2091 if (slu->stlu_meta_fname_size > 0) { 2092 (void) strcpy(sl->sl_meta_filename, slu->stlu_meta_fname); 2093 } 2094 sl->sl_name = sl->sl_meta_filename; 2095 2096 sl->sl_device_id[3] = 16; 2097 sl->sl_device_id[0] = 0xf1; 2098 sl->sl_device_id[1] = 3; 2099 sl->sl_device_id[2] = 0; 2100 bcopy(slu->stlu_guid, sl->sl_device_id + 4, 16); 2101 lu->lu_id = (scsi_devid_desc_t *)sl->sl_device_id; 2102 sl->sl_access_state = SBD_LU_STANDBY; 2103 2104 rw_init(&sl->sl_pgr->pgr_lock, NULL, RW_DRIVER, NULL); 2105 mutex_init(&sl->sl_lock, NULL, MUTEX_DRIVER, NULL); 2106 mutex_init(&sl->sl_metadata_lock, NULL, MUTEX_DRIVER, NULL); 2107 rw_init(&sl->sl_access_state_lock, NULL, RW_DRIVER, NULL); 2108 2109 sl->sl_trans_op = SL_OP_CREATE_REGISTER_LU; 2110 2111 if (sbd_link_lu(sl) != SBD_SUCCESS) { 2112 *err_ret = SBD_RET_FILE_ALREADY_REGISTERED; 2113 ret = EALREADY; 2114 goto scs_err_out; 2115 } 2116 2117 ret = sbd_populate_and_register_lu(sl, err_ret); 2118 if (ret) { 2119 goto scs_err_out; 2120 } 2121 2122 sl->sl_trans_op = SL_OP_NONE; 2123 atomic_add_32(&sbd_lu_count, 1); 2124 return (0); 2125 2126 scs_err_out: 2127 return (sbd_close_delete_lu(sl, ret)); 2128 } 2129 2130 int 2131 sbd_load_sli_1_0(sbd_lu_t *sl, uint32_t *err_ret) 2132 { 2133 sbd_lu_info_1_0_t *sli = NULL; 2134 sbd_status_t sret; 2135 2136 sret = sbd_read_meta_section(sl, (sm_section_hdr_t **)&sli, 2137 SMS_ID_LU_INFO_1_0); 2138 2139 if (sret != SBD_SUCCESS) { 2140 *err_ret = SBD_RET_NO_META; 2141 return (EIO); 2142 } 2143 if (sli->sli_data_order != SMS_DATA_ORDER) { 2144 sbd_swap_lu_info_1_0(sli); 2145 if (sli->sli_data_order != SMS_DATA_ORDER) { 2146 kmem_free(sli, sli->sli_sms_header.sms_size); 2147 *err_ret = SBD_RET_NO_META; 2148 return (EIO); 2149 } 2150 } 2151 2152 sl->sl_flags |= SL_SHARED_META; 2153 sl->sl_data_blocksize_shift = 9; 2154 sl->sl_data_offset = SHARED_META_DATA_SIZE; 2155 sl->sl_lu_size = sli->sli_total_store_size - SHARED_META_DATA_SIZE; 2156 sl->sl_total_data_size = SHARED_META_DATA_SIZE + sl->sl_lu_size; 2157 bcopy(sli->sli_lu_devid, sl->sl_device_id, 20); 2158 2159 kmem_free(sli, sli->sli_sms_header.sms_size); 2160 return (0); 2161 } 2162 2163 int 2164 sbd_import_lu(sbd_import_lu_t *ilu, int struct_sz, uint32_t *err_ret, 2165 int no_register, sbd_lu_t **slr) 2166 { 2167 stmf_lu_t *lu; 2168 sbd_lu_t *sl; 2169 sbd_lu_info_1_1_t *sli = NULL; 2170 int asz; 2171 int ret = 0; 2172 stmf_status_t stret; 2173 int flag; 2174 int wcd = 0; 2175 int data_opened; 2176 uint16_t sli_buf_sz; 2177 uint8_t *sli_buf_copy = NULL; 2178 enum vtype vt; 2179 int standby = 0; 2180 sbd_status_t sret; 2181 2182 if (no_register && slr == NULL) { 2183 return (EINVAL); 2184 } 2185 ilu->ilu_meta_fname[struct_sz - sizeof (*ilu) + 8 - 1] = 0; 2186 /* 2187 * check whether logical unit is already registered ALUA 2188 * For a standby logical unit, the meta filename is set. Use 2189 * that to search for an existing logical unit. 2190 */ 2191 sret = sbd_find_and_lock_lu(NULL, (uint8_t *)&(ilu->ilu_meta_fname), 2192 SL_OP_IMPORT_LU, &sl); 2193 2194 if (sret == SBD_SUCCESS) { 2195 if (sl->sl_access_state != SBD_LU_ACTIVE) { 2196 no_register = 1; 2197 standby = 1; 2198 lu = sl->sl_lu; 2199 if (sl->sl_alias_alloc_size) { 2200 kmem_free(sl->sl_alias, 2201 sl->sl_alias_alloc_size); 2202 sl->sl_alias_alloc_size = 0; 2203 sl->sl_alias = NULL; 2204 lu->lu_alias = NULL; 2205 } 2206 if (sl->sl_meta_filename == NULL) { 2207 sl->sl_meta_filename = sl->sl_data_filename; 2208 } else if (sl->sl_data_fname_alloc_size) { 2209 kmem_free(sl->sl_data_filename, 2210 sl->sl_data_fname_alloc_size); 2211 sl->sl_data_fname_alloc_size = 0; 2212 } 2213 if (sl->sl_serial_no_alloc_size) { 2214 kmem_free(sl->sl_serial_no, 2215 sl->sl_serial_no_alloc_size); 2216 sl->sl_serial_no_alloc_size = 0; 2217 } 2218 if (sl->sl_mgmt_url_alloc_size) { 2219 kmem_free(sl->sl_mgmt_url, 2220 sl->sl_mgmt_url_alloc_size); 2221 sl->sl_mgmt_url_alloc_size = 0; 2222 } 2223 } else { 2224 *err_ret = SBD_RET_FILE_ALREADY_REGISTERED; 2225 sl->sl_trans_op = SL_OP_NONE; 2226 return (EALREADY); 2227 } 2228 } else if (sret == SBD_NOT_FOUND) { 2229 asz = strlen(ilu->ilu_meta_fname) + 1; 2230 2231 lu = (stmf_lu_t *)stmf_alloc(STMF_STRUCT_STMF_LU, 2232 sizeof (sbd_lu_t) + sizeof (sbd_pgr_t) + asz, 0); 2233 if (lu == NULL) { 2234 return (ENOMEM); 2235 } 2236 sl = (sbd_lu_t *)lu->lu_provider_private; 2237 bzero(sl, sizeof (*sl)); 2238 sl->sl_lu = lu; 2239 sl->sl_pgr = (sbd_pgr_t *)(sl + 1); 2240 sl->sl_meta_filename = ((char *)sl) + sizeof (*sl) + 2241 sizeof (sbd_pgr_t); 2242 (void) strcpy(sl->sl_meta_filename, ilu->ilu_meta_fname); 2243 sl->sl_name = sl->sl_meta_filename; 2244 rw_init(&sl->sl_pgr->pgr_lock, NULL, RW_DRIVER, NULL); 2245 rw_init(&sl->sl_access_state_lock, NULL, RW_DRIVER, NULL); 2246 mutex_init(&sl->sl_lock, NULL, MUTEX_DRIVER, NULL); 2247 mutex_init(&sl->sl_metadata_lock, NULL, MUTEX_DRIVER, NULL); 2248 sl->sl_trans_op = SL_OP_IMPORT_LU; 2249 } else { 2250 *err_ret = SBD_RET_META_FILE_LOOKUP_FAILED; 2251 return (EIO); 2252 } 2253 2254 /* we're only loading the metadata */ 2255 if (!no_register) { 2256 if (sbd_link_lu(sl) != SBD_SUCCESS) { 2257 *err_ret = SBD_RET_FILE_ALREADY_REGISTERED; 2258 ret = EALREADY; 2259 goto sim_err_out; 2260 } 2261 } 2262 if ((ret = lookupname(sl->sl_meta_filename, UIO_SYSSPACE, FOLLOW, 2263 NULLVPP, &sl->sl_meta_vp)) != 0) { 2264 *err_ret = SBD_RET_META_FILE_LOOKUP_FAILED; 2265 goto sim_err_out; 2266 } 2267 if (sbd_is_zvol(sl->sl_meta_filename)) { 2268 sl->sl_flags |= SL_ZFS_META; 2269 sl->sl_data_filename = sl->sl_meta_filename; 2270 } 2271 sl->sl_meta_vtype = vt = sl->sl_meta_vp->v_type; 2272 VN_RELE(sl->sl_meta_vp); 2273 if ((vt != VREG) && (vt != VCHR) && (vt != VBLK)) { 2274 *err_ret = SBD_RET_WRONG_META_FILE_TYPE; 2275 ret = EINVAL; 2276 goto sim_err_out; 2277 } 2278 if (sl->sl_flags & SL_ZFS_META) { 2279 if (sbd_open_zfs_meta(sl) != SBD_SUCCESS) { 2280 /* let see if metadata is in the 64k block */ 2281 sl->sl_flags &= ~SL_ZFS_META; 2282 } 2283 } 2284 if (!(sl->sl_flags & SL_ZFS_META)) { 2285 /* metadata is always writable */ 2286 flag = FREAD | FWRITE | FOFFMAX | FEXCL; 2287 if ((ret = vn_open(sl->sl_meta_filename, UIO_SYSSPACE, flag, 0, 2288 &sl->sl_meta_vp, 0, 0)) != 0) { 2289 *err_ret = SBD_RET_META_FILE_OPEN_FAILED; 2290 goto sim_err_out; 2291 } 2292 } 2293 if ((sl->sl_flags & SL_ZFS_META) || (vt == VREG)) { 2294 sl->sl_meta_blocksize_shift = 0; 2295 } else { 2296 sl->sl_meta_blocksize_shift = 9; 2297 } 2298 sl->sl_meta_offset = (sl->sl_flags & SL_ZFS_META) ? 0 : SBD_META_OFFSET; 2299 sl->sl_flags |= SL_META_OPENED; 2300 2301 mutex_enter(&sl->sl_metadata_lock); 2302 sret = sbd_load_meta_start(sl); 2303 mutex_exit(&sl->sl_metadata_lock); 2304 if (sret != SBD_SUCCESS) { 2305 if (sret == SBD_META_CORRUPTED) { 2306 *err_ret = SBD_RET_NO_META; 2307 } else if (sret == SBD_NOT_SUPPORTED) { 2308 *err_ret = SBD_RET_VERSION_NOT_SUPPORTED; 2309 } else { 2310 *err_ret = SBD_RET_NO_META; 2311 } 2312 ret = EINVAL; 2313 goto sim_err_out; 2314 } 2315 2316 /* Now lets see if we can read the most recent LU info */ 2317 sret = sbd_read_meta_section(sl, (sm_section_hdr_t **)&sli, 2318 SMS_ID_LU_INFO_1_1); 2319 if ((sret == SBD_NOT_FOUND) && ((sl->sl_flags & SL_ZFS_META) == 0)) { 2320 ret = sbd_load_sli_1_0(sl, err_ret); 2321 if (ret) { 2322 goto sim_err_out; 2323 } 2324 goto sim_sli_loaded; 2325 } 2326 if (sret != SBD_SUCCESS) { 2327 *err_ret = SBD_RET_NO_META; 2328 ret = EIO; 2329 goto sim_err_out; 2330 } 2331 /* load sli 1.1 */ 2332 if (sli->sli_data_order != SMS_DATA_ORDER) { 2333 sbd_swap_lu_info_1_1(sli); 2334 if (sli->sli_data_order != SMS_DATA_ORDER) { 2335 *err_ret = SBD_RET_NO_META; 2336 ret = EIO; 2337 goto sim_err_out; 2338 } 2339 } 2340 2341 sli_buf_sz = sli->sli_sms_header.sms_size - 2342 sizeof (sbd_lu_info_1_1_t) + 8; 2343 sli_buf_copy = kmem_alloc(sli_buf_sz + 1, KM_SLEEP); 2344 bcopy(sli->sli_buf, sli_buf_copy, sli_buf_sz); 2345 sli_buf_copy[sli_buf_sz] = 0; 2346 2347 /* Make sure all the offsets are within limits */ 2348 if (((sli->sli_flags & SLI_META_FNAME_VALID) && 2349 (sli->sli_meta_fname_offset > sli_buf_sz)) || 2350 ((sli->sli_flags & SLI_DATA_FNAME_VALID) && 2351 (sli->sli_data_fname_offset > sli_buf_sz)) || 2352 ((sli->sli_flags & SLI_MGMT_URL_VALID) && 2353 (sli->sli_mgmt_url_offset > sli_buf_sz)) || 2354 ((sli->sli_flags & SLI_SERIAL_VALID) && 2355 ((sli->sli_serial_offset + sli->sli_serial_size) > sli_buf_sz)) || 2356 ((sli->sli_flags & SLI_ALIAS_VALID) && 2357 (sli->sli_alias_offset > sli_buf_sz))) { 2358 *err_ret = SBD_RET_NO_META; 2359 ret = EIO; 2360 goto sim_err_out; 2361 } 2362 2363 sl->sl_lu_size = sli->sli_lu_size; 2364 sl->sl_data_blocksize_shift = sli->sli_data_blocksize_shift; 2365 bcopy(sli->sli_device_id, sl->sl_device_id, 20); 2366 if (sli->sli_flags & SLI_SERIAL_VALID) { 2367 sl->sl_serial_no_size = sl->sl_serial_no_alloc_size = 2368 sli->sli_serial_size; 2369 sl->sl_serial_no = kmem_zalloc(sli->sli_serial_size, KM_SLEEP); 2370 bcopy(sli_buf_copy + sli->sli_serial_offset, sl->sl_serial_no, 2371 sl->sl_serial_no_size); 2372 } 2373 if (sli->sli_flags & SLI_SEPARATE_META) { 2374 sl->sl_total_data_size = sl->sl_lu_size; 2375 if (sli->sli_flags & SLI_DATA_FNAME_VALID) { 2376 sl->sl_data_fname_alloc_size = strlen((char *) 2377 sli_buf_copy + sli->sli_data_fname_offset) + 1; 2378 sl->sl_data_filename = kmem_zalloc( 2379 sl->sl_data_fname_alloc_size, KM_SLEEP); 2380 (void) strcpy(sl->sl_data_filename, 2381 (char *)sli_buf_copy + sli->sli_data_fname_offset); 2382 } 2383 } else { 2384 if (sl->sl_flags & SL_ZFS_META) { 2385 sl->sl_total_data_size = sl->sl_lu_size; 2386 sl->sl_data_offset = 0; 2387 } else { 2388 sl->sl_total_data_size = 2389 sl->sl_lu_size + SHARED_META_DATA_SIZE; 2390 sl->sl_data_offset = SHARED_META_DATA_SIZE; 2391 sl->sl_flags |= SL_SHARED_META; 2392 } 2393 } 2394 if (sli->sli_flags & SLI_ALIAS_VALID) { 2395 sl->sl_alias_alloc_size = strlen((char *)sli_buf_copy + 2396 sli->sli_alias_offset) + 1; 2397 sl->sl_alias = kmem_alloc(sl->sl_alias_alloc_size, KM_SLEEP); 2398 (void) strcpy(sl->sl_alias, (char *)sli_buf_copy + 2399 sli->sli_alias_offset); 2400 } 2401 if (sli->sli_flags & SLI_MGMT_URL_VALID) { 2402 sl->sl_mgmt_url_alloc_size = strlen((char *)sli_buf_copy + 2403 sli->sli_mgmt_url_offset) + 1; 2404 sl->sl_mgmt_url = kmem_alloc(sl->sl_mgmt_url_alloc_size, 2405 KM_SLEEP); 2406 (void) strcpy(sl->sl_mgmt_url, (char *)sli_buf_copy + 2407 sli->sli_mgmt_url_offset); 2408 } 2409 if (sli->sli_flags & SLI_WRITE_PROTECTED) { 2410 sl->sl_flags |= SL_WRITE_PROTECTED; 2411 } 2412 if (sli->sli_flags & SLI_VID_VALID) { 2413 sl->sl_flags |= SL_VID_VALID; 2414 bcopy(sli->sli_vid, sl->sl_vendor_id, 8); 2415 } 2416 if (sli->sli_flags & SLI_PID_VALID) { 2417 sl->sl_flags |= SL_PID_VALID; 2418 bcopy(sli->sli_pid, sl->sl_product_id, 16); 2419 } 2420 if (sli->sli_flags & SLI_REV_VALID) { 2421 sl->sl_flags |= SL_REV_VALID; 2422 bcopy(sli->sli_rev, sl->sl_revision, 4); 2423 } 2424 if (sli->sli_flags & SLI_WRITEBACK_CACHE_DISABLE) { 2425 sl->sl_flags |= SL_WRITEBACK_CACHE_DISABLE; 2426 } 2427 sim_sli_loaded: 2428 if ((sl->sl_flags & SL_SHARED_META) == 0) { 2429 data_opened = 0; 2430 } else { 2431 data_opened = 1; 2432 sl->sl_data_filename = sl->sl_meta_filename; 2433 sl->sl_data_vp = sl->sl_meta_vp; 2434 sl->sl_data_vtype = sl->sl_meta_vtype; 2435 } 2436 2437 sret = sbd_pgr_meta_load(sl); 2438 if (sret != SBD_SUCCESS) { 2439 *err_ret = SBD_RET_NO_META; 2440 ret = EIO; 2441 goto sim_err_out; 2442 } 2443 2444 ret = sbd_open_data_file(sl, err_ret, 1, data_opened, 0); 2445 if (ret) { 2446 goto sim_err_out; 2447 } 2448 2449 /* 2450 * set write cache disable on the device 2451 * Note: this shouldn't fail on import unless the cache capabilities 2452 * of the device changed. If that happened, modify will need to 2453 * be used to set the cache flag appropriately after import is done. 2454 */ 2455 if (sl->sl_flags & SL_WRITEBACK_CACHE_DISABLE) { 2456 (void) sbd_wcd_set(1, sl); 2457 wcd = 1; 2458 /* 2459 * if not explicitly set, attempt to set it to enable, if that fails 2460 * get the current setting and use that 2461 */ 2462 } else { 2463 sret = sbd_wcd_set(0, sl); 2464 if (sret != SBD_SUCCESS) { 2465 sbd_wcd_get(&wcd, sl); 2466 } 2467 } 2468 2469 if (wcd) { 2470 sl->sl_flags |= SL_WRITEBACK_CACHE_DISABLE | 2471 SL_SAVED_WRITE_CACHE_DISABLE; 2472 } 2473 2474 /* we're only loading the metadata */ 2475 if (!no_register) { 2476 ret = sbd_populate_and_register_lu(sl, err_ret); 2477 if (ret) { 2478 goto sim_err_out; 2479 } 2480 atomic_add_32(&sbd_lu_count, 1); 2481 } 2482 2483 bcopy(sl->sl_device_id + 4, ilu->ilu_ret_guid, 16); 2484 sl->sl_trans_op = SL_OP_NONE; 2485 2486 if (sli) { 2487 kmem_free(sli, sli->sli_sms_header.sms_size); 2488 sli = NULL; 2489 } 2490 if (sli_buf_copy) { 2491 kmem_free(sli_buf_copy, sli_buf_sz + 1); 2492 sli_buf_copy = NULL; 2493 } 2494 if (no_register && !standby) { 2495 *slr = sl; 2496 } 2497 2498 /* 2499 * if this was imported from standby, set the access state 2500 * to active. 2501 */ 2502 if (standby) { 2503 sbd_it_data_t *it; 2504 mutex_enter(&sl->sl_lock); 2505 sl->sl_access_state = SBD_LU_ACTIVE; 2506 for (it = sl->sl_it_list; it != NULL; 2507 it = it->sbd_it_next) { 2508 it->sbd_it_ua_conditions |= 2509 SBD_UA_ASYMMETRIC_ACCESS_CHANGED; 2510 it->sbd_it_ua_conditions |= SBD_UA_POR; 2511 } 2512 mutex_exit(&sl->sl_lock); 2513 /* call set access state */ 2514 stret = stmf_set_lu_access(lu, STMF_LU_ACTIVE); 2515 if (stret != STMF_SUCCESS) { 2516 *err_ret = SBD_RET_ACCESS_STATE_FAILED; 2517 sl->sl_access_state = SBD_LU_STANDBY; 2518 goto sim_err_out; 2519 } 2520 if (sl->sl_alias) { 2521 lu->lu_alias = sl->sl_alias; 2522 } else { 2523 lu->lu_alias = sl->sl_name; 2524 } 2525 } 2526 sl->sl_access_state = SBD_LU_ACTIVE; 2527 return (0); 2528 2529 sim_err_out: 2530 if (sli) { 2531 kmem_free(sli, sli->sli_sms_header.sms_size); 2532 sli = NULL; 2533 } 2534 if (sli_buf_copy) { 2535 kmem_free(sli_buf_copy, sli_buf_sz + 1); 2536 sli_buf_copy = NULL; 2537 } 2538 2539 if (standby) { 2540 *err_ret = SBD_RET_ACCESS_STATE_FAILED; 2541 sl->sl_trans_op = SL_OP_NONE; 2542 return (EIO); 2543 } else { 2544 return (sbd_close_delete_lu(sl, ret)); 2545 } 2546 } 2547 2548 int 2549 sbd_modify_lu(sbd_modify_lu_t *mlu, int struct_sz, uint32_t *err_ret) 2550 { 2551 sbd_lu_t *sl = NULL; 2552 uint16_t alias_sz; 2553 int ret = 0; 2554 sbd_it_data_t *it; 2555 sbd_status_t sret; 2556 uint64_t old_size; 2557 int modify_unregistered = 0; 2558 int ua = 0; 2559 sbd_import_lu_t *ilu; 2560 stmf_lu_t *lu; 2561 uint32_t ilu_sz; 2562 uint32_t sz; 2563 2564 sz = struct_sz - sizeof (*mlu) + 8 + 1; 2565 2566 /* if there is data in the buf, null terminate it */ 2567 if (struct_sz > sizeof (*mlu)) { 2568 mlu->mlu_buf[struct_sz - sizeof (*mlu) + 8 - 1] = 0; 2569 } 2570 2571 *err_ret = 0; 2572 2573 /* Lets validate offsets */ 2574 if (((mlu->mlu_alias_valid) && 2575 (mlu->mlu_alias_off >= sz)) || 2576 ((mlu->mlu_mgmt_url_valid) && 2577 (mlu->mlu_mgmt_url_off >= sz)) || 2578 (mlu->mlu_by_fname) && 2579 (mlu->mlu_fname_off >= sz)) { 2580 return (EINVAL); 2581 } 2582 2583 /* 2584 * We'll look for the device but if we don't find it registered, 2585 * we'll still try to modify the unregistered device. 2586 */ 2587 if (mlu->mlu_by_guid) { 2588 sret = sbd_find_and_lock_lu(mlu->mlu_input_guid, NULL, 2589 SL_OP_MODIFY_LU, &sl); 2590 } else if (mlu->mlu_by_fname) { 2591 sret = sbd_find_and_lock_lu(NULL, 2592 (uint8_t *)&(mlu->mlu_buf[mlu->mlu_fname_off]), 2593 SL_OP_MODIFY_LU, &sl); 2594 } else { 2595 return (EINVAL); 2596 } 2597 2598 2599 if (sret != SBD_SUCCESS) { 2600 if (sret == SBD_BUSY) { 2601 *err_ret = SBD_RET_LU_BUSY; 2602 return (EBUSY); 2603 } else if (sret != SBD_NOT_FOUND) { 2604 return (EIO); 2605 } else if (!mlu->mlu_by_fname) { 2606 return (EINVAL); 2607 } 2608 /* Okay, try to import the device */ 2609 struct_sz = max(8, strlen(&(mlu->mlu_buf[mlu->mlu_fname_off])) 2610 + 1); 2611 struct_sz += sizeof (sbd_import_lu_t) - 8; 2612 ilu_sz = struct_sz; 2613 ilu = (sbd_import_lu_t *)kmem_zalloc(ilu_sz, KM_SLEEP); 2614 ilu->ilu_struct_size = struct_sz; 2615 (void) strcpy(ilu->ilu_meta_fname, 2616 &(mlu->mlu_buf[mlu->mlu_fname_off])); 2617 ret = sbd_import_lu(ilu, struct_sz, err_ret, 1, &sl); 2618 kmem_free(ilu, ilu_sz); 2619 if (ret != SBD_SUCCESS) { 2620 return (ENOENT); 2621 } 2622 modify_unregistered = 1; 2623 } 2624 2625 if (sl->sl_access_state != SBD_LU_ACTIVE) { 2626 *err_ret = SBD_RET_ACCESS_STATE_FAILED; 2627 ret = EINVAL; 2628 goto smm_err_out; 2629 } 2630 2631 /* check for write cache change */ 2632 if (mlu->mlu_writeback_cache_disable_valid) { 2633 /* set wce on device */ 2634 sret = sbd_wcd_set(mlu->mlu_writeback_cache_disable, sl); 2635 if (!mlu->mlu_writeback_cache_disable && sret != SBD_SUCCESS) { 2636 *err_ret = SBD_RET_WRITE_CACHE_SET_FAILED; 2637 ret = EFAULT; 2638 goto smm_err_out; 2639 } 2640 mutex_enter(&sl->sl_lock); 2641 if (!mlu->mlu_writeback_cache_disable) { 2642 if (sl->sl_flags & SL_WRITEBACK_CACHE_DISABLE) { 2643 ua = 1; 2644 sl->sl_flags &= ~SL_WRITEBACK_CACHE_DISABLE; 2645 sl->sl_flags &= ~SL_SAVED_WRITE_CACHE_DISABLE; 2646 } 2647 } else { 2648 if ((sl->sl_flags & SL_WRITEBACK_CACHE_DISABLE) == 0) { 2649 ua = 1; 2650 sl->sl_flags |= SL_WRITEBACK_CACHE_DISABLE; 2651 sl->sl_flags |= SL_SAVED_WRITE_CACHE_DISABLE; 2652 } 2653 } 2654 for (it = sl->sl_it_list; ua && it != NULL; 2655 it = it->sbd_it_next) { 2656 it->sbd_it_ua_conditions |= 2657 SBD_UA_MODE_PARAMETERS_CHANGED; 2658 } 2659 mutex_exit(&sl->sl_lock); 2660 } 2661 ua = 0; 2662 2663 if (mlu->mlu_alias_valid) { 2664 alias_sz = strlen((char *)mlu->mlu_buf + 2665 mlu->mlu_alias_off) + 1; 2666 /* 2667 * Use the allocated buffer or alloc a new one. 2668 * Don't copy into sl_alias if sl_alias_alloc_size is 0 2669 * otherwise or you'll be writing over the data/metadata 2670 * filename. 2671 */ 2672 mutex_enter(&sl->sl_lock); 2673 if (sl->sl_alias_alloc_size > 0 && 2674 sl->sl_alias_alloc_size < alias_sz) { 2675 kmem_free(sl->sl_alias, 2676 sl->sl_alias_alloc_size); 2677 sl->sl_alias_alloc_size = 0; 2678 } 2679 if (sl->sl_alias_alloc_size == 0) { 2680 sl->sl_alias = kmem_alloc(alias_sz, KM_SLEEP); 2681 sl->sl_alias_alloc_size = alias_sz; 2682 } 2683 (void) strcpy(sl->sl_alias, (char *)mlu->mlu_buf + 2684 mlu->mlu_alias_off); 2685 lu = sl->sl_lu; 2686 lu->lu_alias = sl->sl_alias; 2687 mutex_exit(&sl->sl_lock); 2688 } 2689 2690 if (mlu->mlu_mgmt_url_valid) { 2691 uint16_t url_sz; 2692 2693 url_sz = strlen((char *)mlu->mlu_buf + mlu->mlu_mgmt_url_off); 2694 if (url_sz > 0) 2695 url_sz++; 2696 2697 mutex_enter(&sl->sl_lock); 2698 if (sl->sl_mgmt_url_alloc_size > 0 && 2699 (url_sz == 0 || sl->sl_mgmt_url_alloc_size < url_sz)) { 2700 kmem_free(sl->sl_mgmt_url, sl->sl_mgmt_url_alloc_size); 2701 sl->sl_mgmt_url = NULL; 2702 sl->sl_mgmt_url_alloc_size = 0; 2703 } 2704 if (url_sz > 0) { 2705 if (sl->sl_mgmt_url_alloc_size == 0) { 2706 sl->sl_mgmt_url = kmem_alloc(url_sz, KM_SLEEP); 2707 sl->sl_mgmt_url_alloc_size = url_sz; 2708 } 2709 (void) strcpy(sl->sl_mgmt_url, (char *)mlu->mlu_buf + 2710 mlu->mlu_mgmt_url_off); 2711 } 2712 for (it = sl->sl_it_list; it != NULL; 2713 it = it->sbd_it_next) { 2714 it->sbd_it_ua_conditions |= 2715 SBD_UA_MODE_PARAMETERS_CHANGED; 2716 } 2717 mutex_exit(&sl->sl_lock); 2718 } 2719 2720 if (mlu->mlu_write_protected_valid) { 2721 mutex_enter(&sl->sl_lock); 2722 if (mlu->mlu_write_protected) { 2723 if ((sl->sl_flags & SL_WRITE_PROTECTED) == 0) { 2724 ua = 1; 2725 sl->sl_flags |= SL_WRITE_PROTECTED; 2726 } 2727 } else { 2728 if (sl->sl_flags & SL_WRITE_PROTECTED) { 2729 ua = 1; 2730 sl->sl_flags &= ~SL_WRITE_PROTECTED; 2731 } 2732 } 2733 for (it = sl->sl_it_list; ua && it != NULL; 2734 it = it->sbd_it_next) { 2735 it->sbd_it_ua_conditions |= 2736 SBD_UA_MODE_PARAMETERS_CHANGED; 2737 } 2738 mutex_exit(&sl->sl_lock); 2739 } 2740 2741 if (mlu->mlu_lu_size_valid) { 2742 /* 2743 * validate lu size and set 2744 * For open file only (registered lu) 2745 */ 2746 mutex_enter(&sl->sl_lock); 2747 old_size = sl->sl_lu_size; 2748 sl->sl_lu_size = mlu->mlu_lu_size; 2749 mutex_exit(&sl->sl_lock); 2750 ret = sbd_open_data_file(sl, err_ret, 1, 1, 1); 2751 if (ret) { 2752 mutex_enter(&sl->sl_lock); 2753 sl->sl_lu_size = old_size; 2754 mutex_exit(&sl->sl_lock); 2755 goto smm_err_out; 2756 } 2757 if (old_size != mlu->mlu_lu_size) { 2758 mutex_enter(&sl->sl_lock); 2759 for (it = sl->sl_it_list; it != NULL; 2760 it = it->sbd_it_next) { 2761 it->sbd_it_ua_conditions |= 2762 SBD_UA_CAPACITY_CHANGED; 2763 } 2764 mutex_exit(&sl->sl_lock); 2765 } 2766 } 2767 2768 if (sbd_write_lu_info(sl) != SBD_SUCCESS) { 2769 *err_ret = SBD_RET_META_CREATION_FAILED; 2770 ret = EIO; 2771 } 2772 2773 smm_err_out: 2774 if (modify_unregistered) { 2775 (void) sbd_close_delete_lu(sl, 0); 2776 } else { 2777 sl->sl_trans_op = SL_OP_NONE; 2778 } 2779 return (ret); 2780 } 2781 2782 int 2783 sbd_set_global_props(sbd_global_props_t *mlu, int struct_sz, 2784 uint32_t *err_ret) 2785 { 2786 sbd_lu_t *sl = NULL; 2787 int ret = 0; 2788 sbd_it_data_t *it; 2789 uint32_t sz; 2790 2791 sz = struct_sz - sizeof (*mlu) + 8 + 1; 2792 2793 /* if there is data in the buf, null terminate it */ 2794 if (struct_sz > sizeof (*mlu)) { 2795 mlu->mlu_buf[struct_sz - sizeof (*mlu) + 8 - 1] = 0; 2796 } 2797 2798 *err_ret = 0; 2799 2800 /* Lets validate offsets */ 2801 if (((mlu->mlu_mgmt_url_valid) && 2802 (mlu->mlu_mgmt_url_off >= sz))) { 2803 return (EINVAL); 2804 } 2805 2806 if (mlu->mlu_mgmt_url_valid) { 2807 uint16_t url_sz; 2808 2809 url_sz = strlen((char *)mlu->mlu_buf + mlu->mlu_mgmt_url_off); 2810 if (url_sz > 0) 2811 url_sz++; 2812 2813 rw_enter(&sbd_global_prop_lock, RW_WRITER); 2814 if (sbd_mgmt_url_alloc_size > 0 && 2815 (url_sz == 0 || sbd_mgmt_url_alloc_size < url_sz)) { 2816 kmem_free(sbd_mgmt_url, sbd_mgmt_url_alloc_size); 2817 sbd_mgmt_url = NULL; 2818 sbd_mgmt_url_alloc_size = 0; 2819 } 2820 if (url_sz > 0) { 2821 if (sbd_mgmt_url_alloc_size == 0) { 2822 sbd_mgmt_url = kmem_alloc(url_sz, KM_SLEEP); 2823 sbd_mgmt_url_alloc_size = url_sz; 2824 } 2825 (void) strcpy(sbd_mgmt_url, (char *)mlu->mlu_buf + 2826 mlu->mlu_mgmt_url_off); 2827 } 2828 /* 2829 * check each lu to determine whether a UA is needed. 2830 */ 2831 mutex_enter(&sbd_lock); 2832 for (sl = sbd_lu_list; sl; sl = sl->sl_next) { 2833 if (sl->sl_mgmt_url) { 2834 continue; 2835 } 2836 mutex_enter(&sl->sl_lock); 2837 for (it = sl->sl_it_list; it != NULL; 2838 it = it->sbd_it_next) { 2839 it->sbd_it_ua_conditions |= 2840 SBD_UA_MODE_PARAMETERS_CHANGED; 2841 } 2842 mutex_exit(&sl->sl_lock); 2843 } 2844 mutex_exit(&sbd_lock); 2845 rw_exit(&sbd_global_prop_lock); 2846 } 2847 return (ret); 2848 } 2849 2850 /* ARGSUSED */ 2851 int 2852 sbd_delete_locked_lu(sbd_lu_t *sl, uint32_t *err_ret, 2853 stmf_state_change_info_t *ssi) 2854 { 2855 int i; 2856 stmf_status_t ret; 2857 2858 if ((sl->sl_state == STMF_STATE_OFFLINE) && 2859 !sl->sl_state_not_acked) { 2860 goto sdl_do_dereg; 2861 } 2862 2863 if ((sl->sl_state != STMF_STATE_ONLINE) || 2864 sl->sl_state_not_acked) { 2865 return (EBUSY); 2866 } 2867 2868 ret = stmf_ctl(STMF_CMD_LU_OFFLINE, sl->sl_lu, ssi); 2869 if ((ret != STMF_SUCCESS) && (ret != STMF_ALREADY)) { 2870 return (EBUSY); 2871 } 2872 2873 for (i = 0; i < 500; i++) { 2874 if ((sl->sl_state == STMF_STATE_OFFLINE) && 2875 !sl->sl_state_not_acked) { 2876 goto sdl_do_dereg; 2877 } 2878 delay(drv_usectohz(10000)); 2879 } 2880 return (EBUSY); 2881 2882 sdl_do_dereg:; 2883 if (stmf_deregister_lu(sl->sl_lu) != STMF_SUCCESS) 2884 return (EBUSY); 2885 atomic_add_32(&sbd_lu_count, -1); 2886 2887 return (sbd_close_delete_lu(sl, 0)); 2888 } 2889 2890 int 2891 sbd_delete_lu(sbd_delete_lu_t *dlu, int struct_sz, uint32_t *err_ret) 2892 { 2893 sbd_lu_t *sl; 2894 sbd_status_t sret; 2895 stmf_state_change_info_t ssi; 2896 int ret; 2897 2898 if (dlu->dlu_by_meta_name) { 2899 ((char *)dlu)[struct_sz - 1] = 0; 2900 sret = sbd_find_and_lock_lu(NULL, dlu->dlu_meta_name, 2901 SL_OP_DELETE_LU, &sl); 2902 } else { 2903 sret = sbd_find_and_lock_lu(dlu->dlu_guid, NULL, 2904 SL_OP_DELETE_LU, &sl); 2905 } 2906 if (sret != SBD_SUCCESS) { 2907 if (sret == SBD_BUSY) { 2908 *err_ret = SBD_RET_LU_BUSY; 2909 return (EBUSY); 2910 } else if (sret == SBD_NOT_FOUND) { 2911 *err_ret = SBD_RET_NOT_FOUND; 2912 return (ENOENT); 2913 } 2914 return (EIO); 2915 } 2916 2917 ssi.st_rflags = STMF_RFLAG_USER_REQUEST; 2918 ssi.st_additional_info = "sbd_delete_lu call (ioctl)"; 2919 ret = sbd_delete_locked_lu(sl, err_ret, &ssi); 2920 2921 if (ret) { 2922 /* Once its locked, no need to grab mutex again */ 2923 sl->sl_trans_op = SL_OP_NONE; 2924 } 2925 return (ret); 2926 } 2927 2928 sbd_status_t 2929 sbd_data_read(sbd_lu_t *sl, struct scsi_task *task, 2930 uint64_t offset, uint64_t size, uint8_t *buf) 2931 { 2932 int ret; 2933 long resid; 2934 hrtime_t xfer_start, xfer_done; 2935 2936 if ((offset + size) > sl->sl_lu_size) { 2937 return (SBD_IO_PAST_EOF); 2938 } 2939 2940 offset += sl->sl_data_offset; 2941 2942 if ((offset + size) > sl->sl_data_readable_size) { 2943 uint64_t store_end; 2944 if (offset > sl->sl_data_readable_size) { 2945 bzero(buf, size); 2946 return (SBD_SUCCESS); 2947 } 2948 store_end = sl->sl_data_readable_size - offset; 2949 bzero(buf + store_end, size - store_end); 2950 size = store_end; 2951 } 2952 2953 xfer_start = gethrtime(); 2954 stmf_lu_xfer_start(task); 2955 DTRACE_PROBE5(backing__store__read__start, sbd_lu_t *, sl, 2956 uint8_t *, buf, uint64_t, size, uint64_t, offset, 2957 scsi_task_t *, task); 2958 2959 /* 2960 * Don't proceed if the device has been closed 2961 * This can occur on an access state change to standby or 2962 * a delete. The writer lock is acquired before closing the 2963 * lu. 2964 */ 2965 rw_enter(&sl->sl_access_state_lock, RW_READER); 2966 if ((sl->sl_flags & SL_MEDIA_LOADED) == 0) { 2967 rw_exit(&sl->sl_access_state_lock); 2968 return (SBD_FAILURE); 2969 } 2970 ret = vn_rdwr(UIO_READ, sl->sl_data_vp, (caddr_t)buf, (ssize_t)size, 2971 (offset_t)offset, UIO_SYSSPACE, 0, RLIM64_INFINITY, CRED(), 2972 &resid); 2973 rw_exit(&sl->sl_access_state_lock); 2974 2975 xfer_done = gethrtime() - xfer_start; 2976 stmf_lu_xfer_done(task, B_TRUE /* read */, size, xfer_done); 2977 DTRACE_PROBE6(backing__store__read__end, sbd_lu_t *, sl, 2978 uint8_t *, buf, uint64_t, size, uint64_t, offset, 2979 int, ret, scsi_task_t *, task); 2980 2981 over_sl_data_read: 2982 if (ret || resid) { 2983 stmf_trace(0, "UIO_READ failed, ret = %d, resid = %d", ret, 2984 resid); 2985 return (SBD_FAILURE); 2986 } 2987 2988 return (SBD_SUCCESS); 2989 } 2990 2991 sbd_status_t 2992 sbd_data_write(sbd_lu_t *sl, struct scsi_task *task, 2993 uint64_t offset, uint64_t size, uint8_t *buf) 2994 { 2995 int ret; 2996 long resid; 2997 sbd_status_t sret = SBD_SUCCESS; 2998 int ioflag; 2999 hrtime_t xfer_start, xfer_done; 3000 3001 if ((offset + size) > sl->sl_lu_size) { 3002 return (SBD_IO_PAST_EOF); 3003 } 3004 3005 offset += sl->sl_data_offset; 3006 3007 if ((sl->sl_flags & SL_WRITEBACK_CACHE_DISABLE) && 3008 (sl->sl_flags & SL_FLUSH_ON_DISABLED_WRITECACHE)) { 3009 ioflag = FSYNC; 3010 } else { 3011 ioflag = 0; 3012 } 3013 3014 xfer_start = gethrtime(); 3015 stmf_lu_xfer_start(task); 3016 DTRACE_PROBE5(backing__store__write__start, sbd_lu_t *, sl, 3017 uint8_t *, buf, uint64_t, size, uint64_t, offset, 3018 scsi_task_t *, task); 3019 3020 /* 3021 * Don't proceed if the device has been closed 3022 * This can occur on an access state change to standby or 3023 * a delete. The writer lock is acquired before closing the 3024 * lu. 3025 */ 3026 rw_enter(&sl->sl_access_state_lock, RW_READER); 3027 if ((sl->sl_flags & SL_MEDIA_LOADED) == 0) { 3028 rw_exit(&sl->sl_access_state_lock); 3029 return (SBD_FAILURE); 3030 } 3031 ret = vn_rdwr(UIO_WRITE, sl->sl_data_vp, (caddr_t)buf, (ssize_t)size, 3032 (offset_t)offset, UIO_SYSSPACE, ioflag, RLIM64_INFINITY, CRED(), 3033 &resid); 3034 rw_exit(&sl->sl_access_state_lock); 3035 3036 xfer_done = gethrtime() - xfer_start; 3037 stmf_lu_xfer_done(task, B_FALSE /* write */, size, xfer_done); 3038 DTRACE_PROBE6(backing__store__write__end, sbd_lu_t *, sl, 3039 uint8_t *, buf, uint64_t, size, uint64_t, offset, 3040 int, ret, scsi_task_t *, task); 3041 3042 if ((ret == 0) && (resid == 0) && 3043 (sl->sl_flags & SL_WRITEBACK_CACHE_DISABLE) && 3044 (sl->sl_flags & SL_FLUSH_ON_DISABLED_WRITECACHE)) { 3045 sret = sbd_flush_data_cache(sl, 1); 3046 } 3047 over_sl_data_write: 3048 3049 if ((ret || resid) || (sret != SBD_SUCCESS)) { 3050 return (SBD_FAILURE); 3051 } else if ((offset + size) > sl->sl_data_readable_size) { 3052 uint64_t old_size, new_size; 3053 3054 do { 3055 old_size = sl->sl_data_readable_size; 3056 if ((offset + size) <= old_size) 3057 break; 3058 new_size = offset + size; 3059 } while (atomic_cas_64(&sl->sl_data_readable_size, old_size, 3060 new_size) != old_size); 3061 } 3062 3063 return (SBD_SUCCESS); 3064 } 3065 3066 int 3067 sbd_get_global_props(sbd_global_props_t *oslp, uint32_t oslp_sz, 3068 uint32_t *err_ret) 3069 { 3070 uint32_t sz = 0; 3071 uint16_t off; 3072 3073 rw_enter(&sbd_global_prop_lock, RW_READER); 3074 if (sbd_mgmt_url) { 3075 sz += strlen(sbd_mgmt_url) + 1; 3076 } 3077 bzero(oslp, sizeof (*oslp) - 8); 3078 oslp->mlu_buf_size_needed = sz; 3079 3080 if (sz > (oslp_sz - sizeof (*oslp) + 8)) { 3081 *err_ret = SBD_RET_INSUFFICIENT_BUF_SPACE; 3082 rw_exit(&sbd_global_prop_lock); 3083 return (ENOMEM); 3084 } 3085 3086 off = 0; 3087 if (sbd_mgmt_url) { 3088 oslp->mlu_mgmt_url_valid = 1; 3089 oslp->mlu_mgmt_url_off = off; 3090 (void) strcpy((char *)&oslp->mlu_buf[off], sbd_mgmt_url); 3091 off += strlen(sbd_mgmt_url) + 1; 3092 } 3093 3094 rw_exit(&sbd_global_prop_lock); 3095 return (0); 3096 } 3097 3098 int 3099 sbd_get_lu_props(sbd_lu_props_t *islp, uint32_t islp_sz, 3100 sbd_lu_props_t *oslp, uint32_t oslp_sz, uint32_t *err_ret) 3101 { 3102 sbd_status_t sret; 3103 sbd_lu_t *sl = NULL; 3104 uint32_t sz; 3105 uint16_t off; 3106 3107 if (islp->slp_input_guid) { 3108 sret = sbd_find_and_lock_lu(islp->slp_guid, NULL, 3109 SL_OP_LU_PROPS, &sl); 3110 } else { 3111 ((char *)islp)[islp_sz - 1] = 0; 3112 sret = sbd_find_and_lock_lu(NULL, islp->slp_buf, 3113 SL_OP_LU_PROPS, &sl); 3114 } 3115 if (sret != SBD_SUCCESS) { 3116 if (sret == SBD_BUSY) { 3117 *err_ret = SBD_RET_LU_BUSY; 3118 return (EBUSY); 3119 } else if (sret == SBD_NOT_FOUND) { 3120 *err_ret = SBD_RET_NOT_FOUND; 3121 return (ENOENT); 3122 } 3123 return (EIO); 3124 } 3125 3126 sz = strlen(sl->sl_name) + 1; 3127 if ((sl->sl_flags & (SL_ZFS_META | SL_SHARED_META)) == 0) { 3128 if (sl->sl_data_filename) { 3129 sz += strlen(sl->sl_data_filename) + 1; 3130 } 3131 } 3132 sz += sl->sl_serial_no_size; 3133 if (sl->sl_alias) { 3134 sz += strlen(sl->sl_alias) + 1; 3135 } 3136 3137 rw_enter(&sbd_global_prop_lock, RW_READER); 3138 if (sl->sl_mgmt_url) { 3139 sz += strlen(sl->sl_mgmt_url) + 1; 3140 } else if (sbd_mgmt_url) { 3141 sz += strlen(sbd_mgmt_url) + 1; 3142 } 3143 bzero(oslp, sizeof (*oslp) - 8); 3144 oslp->slp_buf_size_needed = sz; 3145 3146 if (sz > (oslp_sz - sizeof (*oslp) + 8)) { 3147 sl->sl_trans_op = SL_OP_NONE; 3148 *err_ret = SBD_RET_INSUFFICIENT_BUF_SPACE; 3149 rw_exit(&sbd_global_prop_lock); 3150 return (ENOMEM); 3151 } 3152 3153 off = 0; 3154 (void) strcpy((char *)oslp->slp_buf, sl->sl_name); 3155 oslp->slp_meta_fname_off = off; 3156 off += strlen(sl->sl_name) + 1; 3157 if ((sl->sl_flags & (SL_ZFS_META | SL_SHARED_META)) == 0) { 3158 oslp->slp_meta_fname_valid = 1; 3159 oslp->slp_separate_meta = 1; 3160 if (sl->sl_data_filename) { 3161 oslp->slp_data_fname_valid = 1; 3162 oslp->slp_data_fname_off = off; 3163 (void) strcpy((char *)&oslp->slp_buf[off], 3164 sl->sl_data_filename); 3165 off += strlen(sl->sl_data_filename) + 1; 3166 } 3167 } else { 3168 oslp->slp_data_fname_valid = 1; 3169 oslp->slp_data_fname_off = oslp->slp_meta_fname_off; 3170 if (sl->sl_flags & SL_ZFS_META) { 3171 oslp->slp_zfs_meta = 1; 3172 } 3173 } 3174 if (sl->sl_alias) { 3175 oslp->slp_alias_valid = 1; 3176 oslp->slp_alias_off = off; 3177 (void) strcpy((char *)&oslp->slp_buf[off], sl->sl_alias); 3178 off += strlen(sl->sl_alias) + 1; 3179 } 3180 if (sl->sl_mgmt_url) { 3181 oslp->slp_mgmt_url_valid = 1; 3182 oslp->slp_mgmt_url_off = off; 3183 (void) strcpy((char *)&oslp->slp_buf[off], sl->sl_mgmt_url); 3184 off += strlen(sl->sl_mgmt_url) + 1; 3185 } else if (sbd_mgmt_url) { 3186 oslp->slp_mgmt_url_valid = 1; 3187 oslp->slp_mgmt_url_off = off; 3188 (void) strcpy((char *)&oslp->slp_buf[off], sbd_mgmt_url); 3189 off += strlen(sbd_mgmt_url) + 1; 3190 } 3191 if (sl->sl_serial_no_size) { 3192 oslp->slp_serial_off = off; 3193 bcopy(sl->sl_serial_no, &oslp->slp_buf[off], 3194 sl->sl_serial_no_size); 3195 oslp->slp_serial_size = sl->sl_serial_no_size; 3196 oslp->slp_serial_valid = 1; 3197 off += sl->sl_serial_no_size; 3198 } 3199 3200 oslp->slp_lu_size = sl->sl_lu_size; 3201 oslp->slp_blksize = ((uint16_t)1) << sl->sl_data_blocksize_shift; 3202 3203 oslp->slp_access_state = sl->sl_access_state; 3204 3205 if (sl->sl_flags & SL_VID_VALID) { 3206 oslp->slp_lu_vid = 1; 3207 bcopy(sl->sl_vendor_id, oslp->slp_vid, 8); 3208 } else { 3209 bcopy(sbd_vendor_id, oslp->slp_vid, 8); 3210 } 3211 if (sl->sl_flags & SL_PID_VALID) { 3212 oslp->slp_lu_pid = 1; 3213 bcopy(sl->sl_product_id, oslp->slp_pid, 16); 3214 } else { 3215 bcopy(sbd_product_id, oslp->slp_pid, 16); 3216 } 3217 if (sl->sl_flags & SL_REV_VALID) { 3218 oslp->slp_lu_rev = 1; 3219 bcopy(sl->sl_revision, oslp->slp_rev, 4); 3220 } else { 3221 bcopy(sbd_revision, oslp->slp_rev, 4); 3222 } 3223 bcopy(sl->sl_device_id + 4, oslp->slp_guid, 16); 3224 3225 if (sl->sl_flags & SL_WRITEBACK_CACHE_DISABLE) 3226 oslp->slp_writeback_cache_disable_cur = 1; 3227 if (sl->sl_flags & SL_SAVED_WRITE_CACHE_DISABLE) 3228 oslp->slp_writeback_cache_disable_saved = 1; 3229 if (sl->sl_flags & SL_WRITE_PROTECTED) 3230 oslp->slp_write_protected = 1; 3231 3232 sl->sl_trans_op = SL_OP_NONE; 3233 3234 rw_exit(&sbd_global_prop_lock); 3235 return (0); 3236 } 3237 3238 char * 3239 sbd_get_zvol_name(sbd_lu_t *sl) 3240 { 3241 char *src; 3242 char *p; 3243 3244 if (sl->sl_data_filename) 3245 src = sl->sl_data_filename; 3246 else 3247 src = sl->sl_meta_filename; 3248 /* There has to be a better way */ 3249 if (SBD_IS_ZVOL(src) != 0) { 3250 ASSERT(0); 3251 } 3252 src += 14; 3253 if (*src == '/') 3254 src++; 3255 p = (char *)kmem_alloc(strlen(src) + 1, KM_SLEEP); 3256 (void) strcpy(p, src); 3257 return (p); 3258 } 3259 3260 /* 3261 * this function creates a local metadata zvol property 3262 */ 3263 sbd_status_t 3264 sbd_create_zfs_meta_object(sbd_lu_t *sl) 3265 { 3266 /* 3267 * -allocate 1/2 the property size, the zfs property 3268 * is 8k in size and stored as ascii hex string, all 3269 * we needed is 4k buffer to store the binary data. 3270 * -initialize reader/write lock 3271 */ 3272 if ((sl->sl_zfs_meta = kmem_zalloc(ZAP_MAXVALUELEN / 2, KM_SLEEP)) 3273 == NULL) 3274 return (SBD_FAILURE); 3275 rw_init(&sl->sl_zfs_meta_lock, NULL, RW_DRIVER, NULL); 3276 return (SBD_SUCCESS); 3277 } 3278 3279 char 3280 sbd_ctoi(char c) 3281 { 3282 if ((c >= '0') && (c <= '9')) 3283 c -= '0'; 3284 else if ((c >= 'A') && (c <= 'F')) 3285 c = c - 'A' + 10; 3286 else if ((c >= 'a') && (c <= 'f')) 3287 c = c - 'a' + 10; 3288 else 3289 c = -1; 3290 return (c); 3291 } 3292 3293 /* 3294 * read zvol property and convert to binary 3295 */ 3296 sbd_status_t 3297 sbd_open_zfs_meta(sbd_lu_t *sl) 3298 { 3299 char *meta = NULL, cl, ch; 3300 int i; 3301 char *tmp, *ptr; 3302 uint64_t rc = SBD_SUCCESS; 3303 int len; 3304 char *file; 3305 3306 if (sl->sl_zfs_meta == NULL) { 3307 if (sbd_create_zfs_meta_object(sl) == SBD_FAILURE) 3308 return (SBD_FAILURE); 3309 } else { 3310 bzero(sl->sl_zfs_meta, (ZAP_MAXVALUELEN / 2)); 3311 } 3312 3313 rw_enter(&sl->sl_zfs_meta_lock, RW_WRITER); 3314 file = sbd_get_zvol_name(sl); 3315 if (sbd_zvolget(file, &meta)) { 3316 rc = SBD_FAILURE; 3317 goto done; 3318 } 3319 tmp = meta; 3320 /* convert ascii hex to binary meta */ 3321 len = strlen(meta); 3322 ptr = sl->sl_zfs_meta; 3323 for (i = 0; i < len; i += 2) { 3324 ch = sbd_ctoi(*tmp++); 3325 cl = sbd_ctoi(*tmp++); 3326 if (ch == -1 || cl == -1) { 3327 rc = SBD_FAILURE; 3328 break; 3329 } 3330 *ptr++ = (ch << 4) + cl; 3331 } 3332 done: 3333 rw_exit(&sl->sl_zfs_meta_lock); 3334 if (meta) 3335 kmem_free(meta, len + 1); 3336 kmem_free(file, strlen(file) + 1); 3337 return (rc); 3338 } 3339 3340 sbd_status_t 3341 sbd_read_zfs_meta(sbd_lu_t *sl, uint8_t *buf, uint64_t sz, uint64_t off) 3342 { 3343 ASSERT(sl->sl_zfs_meta); 3344 rw_enter(&sl->sl_zfs_meta_lock, RW_READER); 3345 bcopy(&sl->sl_zfs_meta[off], buf, sz); 3346 rw_exit(&sl->sl_zfs_meta_lock); 3347 return (SBD_SUCCESS); 3348 } 3349 3350 sbd_status_t 3351 sbd_write_zfs_meta(sbd_lu_t *sl, uint8_t *buf, uint64_t sz, uint64_t off) 3352 { 3353 char *ptr, *ah_meta; 3354 char *dp = NULL; 3355 int i, num; 3356 char *file; 3357 3358 ASSERT(sl->sl_zfs_meta); 3359 if ((off + sz) > (ZAP_MAXVALUELEN / 2 - 1)) { 3360 return (SBD_META_CORRUPTED); 3361 } 3362 if ((off + sz) > sl->sl_meta_size_used) { 3363 sl->sl_meta_size_used = off + sz; 3364 if (sl->sl_total_meta_size < sl->sl_meta_size_used) { 3365 uint64_t meta_align = 3366 (((uint64_t)1) << sl->sl_meta_blocksize_shift) - 1; 3367 sl->sl_total_meta_size = (sl->sl_meta_size_used + 3368 meta_align) & (~meta_align); 3369 } 3370 } 3371 ptr = ah_meta = kmem_zalloc(ZAP_MAXVALUELEN, KM_SLEEP); 3372 rw_enter(&sl->sl_zfs_meta_lock, RW_WRITER); 3373 bcopy(buf, &sl->sl_zfs_meta[off], sz); 3374 /* convert local copy to ascii hex */ 3375 dp = sl->sl_zfs_meta; 3376 for (i = 0; i < sl->sl_total_meta_size; i++, dp++) { 3377 num = ((*dp) >> 4) & 0xF; 3378 *ah_meta++ = (num < 10) ? (num + '0') : (num + ('a' - 10)); 3379 num = (*dp) & 0xF; 3380 *ah_meta++ = (num < 10) ? (num + '0') : (num + ('a' - 10)); 3381 } 3382 *ah_meta = NULL; 3383 file = sbd_get_zvol_name(sl); 3384 if (sbd_zvolset(file, (char *)ptr)) { 3385 rw_exit(&sl->sl_zfs_meta_lock); 3386 kmem_free(ptr, ZAP_MAXVALUELEN); 3387 kmem_free(file, strlen(file) + 1); 3388 return (SBD_META_CORRUPTED); 3389 } 3390 rw_exit(&sl->sl_zfs_meta_lock); 3391 kmem_free(ptr, ZAP_MAXVALUELEN); 3392 kmem_free(file, strlen(file) + 1); 3393 return (SBD_SUCCESS); 3394 } 3395 3396 int 3397 sbd_is_zvol(char *path) 3398 { 3399 int is_zfs = 0; 3400 3401 if (SBD_IS_ZVOL(path) == 0) 3402 is_zfs = 1; 3403 3404 return (is_zfs); 3405 } 3406 3407 /* 3408 * set write cache disable 3409 * wcd - 1 = disable, 0 = enable 3410 */ 3411 sbd_status_t 3412 sbd_wcd_set(int wcd, sbd_lu_t *sl) 3413 { 3414 /* translate to wce bit */ 3415 int wce = wcd ? 0 : 1; 3416 int ret; 3417 sbd_status_t sret = SBD_SUCCESS; 3418 3419 mutex_enter(&sl->sl_lock); 3420 sl->sl_flags &= ~SL_WRITEBACK_CACHE_SET_UNSUPPORTED; 3421 3422 if (sl->sl_data_vp->v_type == VREG) { 3423 sl->sl_flags |= SL_FLUSH_ON_DISABLED_WRITECACHE; 3424 goto done; 3425 } 3426 3427 ret = VOP_IOCTL(sl->sl_data_vp, DKIOCSETWCE, (intptr_t)&wce, FKIOCTL, 3428 kcred, NULL, NULL); 3429 if (ret == 0) { 3430 sl->sl_flags &= ~SL_WRITEBACK_CACHE_SET_UNSUPPORTED; 3431 sl->sl_flags &= ~SL_FLUSH_ON_DISABLED_WRITECACHE; 3432 } else { 3433 sl->sl_flags |= SL_WRITEBACK_CACHE_SET_UNSUPPORTED; 3434 sl->sl_flags |= SL_FLUSH_ON_DISABLED_WRITECACHE; 3435 sret = SBD_FAILURE; 3436 goto done; 3437 } 3438 3439 done: 3440 mutex_exit(&sl->sl_lock); 3441 return (sret); 3442 } 3443 3444 /* 3445 * get write cache disable 3446 * wcd - 1 = disable, 0 = enable 3447 */ 3448 void 3449 sbd_wcd_get(int *wcd, sbd_lu_t *sl) 3450 { 3451 int wce; 3452 int ret; 3453 3454 if (sl->sl_data_vp->v_type == VREG) { 3455 *wcd = 0; 3456 return; 3457 } 3458 3459 ret = VOP_IOCTL(sl->sl_data_vp, DKIOCGETWCE, (intptr_t)&wce, FKIOCTL, 3460 kcred, NULL, NULL); 3461 /* if write cache get failed, assume disabled */ 3462 if (ret) { 3463 *wcd = 1; 3464 } else { 3465 /* translate to wcd bit */ 3466 *wcd = wce ? 0 : 1; 3467 } 3468 } 3469 3470 int 3471 sbd_zvolget(char *zvol_name, char **comstarprop) 3472 { 3473 ldi_handle_t zfs_lh; 3474 nvlist_t *nv = NULL, *nv2; 3475 zfs_cmd_t *zc; 3476 char *ptr; 3477 int size = 1024; 3478 int unused; 3479 int rc; 3480 3481 if ((rc = ldi_open_by_name("/dev/zfs", FREAD | FWRITE, kcred, 3482 &zfs_lh, sbd_zfs_ident)) != 0) { 3483 cmn_err(CE_WARN, "ldi_open %d", rc); 3484 return (ENXIO); 3485 } 3486 3487 zc = kmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP); 3488 (void) strlcpy(zc->zc_name, zvol_name, sizeof (zc->zc_name)); 3489 again: 3490 zc->zc_nvlist_dst = (uint64_t)(intptr_t)kmem_alloc(size, 3491 KM_SLEEP); 3492 zc->zc_nvlist_dst_size = size; 3493 rc = ldi_ioctl(zfs_lh, ZFS_IOC_OBJSET_STATS, (intptr_t)zc, 3494 FKIOCTL, kcred, &unused); 3495 /* 3496 * ENOMEM means the list is larger than what we've allocated 3497 * ldi_ioctl will fail with ENOMEM only once 3498 */ 3499 if (rc == ENOMEM) { 3500 int newsize; 3501 newsize = zc->zc_nvlist_dst_size; 3502 kmem_free((void *)(uintptr_t)zc->zc_nvlist_dst, size); 3503 size = newsize; 3504 goto again; 3505 } else if (rc != 0) { 3506 goto out; 3507 } 3508 rc = nvlist_unpack((char *)(uintptr_t)zc->zc_nvlist_dst, 3509 zc->zc_nvlist_dst_size, &nv, 0); 3510 ASSERT(rc == 0); /* nvlist_unpack should not fail */ 3511 if ((rc = nvlist_lookup_nvlist(nv, "stmf_sbd_lu", &nv2)) == 0) { 3512 rc = nvlist_lookup_string(nv2, ZPROP_VALUE, &ptr); 3513 if (rc != 0) { 3514 cmn_err(CE_WARN, "couldn't get value"); 3515 } else { 3516 *comstarprop = kmem_alloc(strlen(ptr) + 1, 3517 KM_SLEEP); 3518 (void) strcpy(*comstarprop, ptr); 3519 } 3520 } 3521 out: 3522 if (nv != NULL) 3523 nvlist_free(nv); 3524 kmem_free((void *)(uintptr_t)zc->zc_nvlist_dst, size); 3525 kmem_free(zc, sizeof (zfs_cmd_t)); 3526 (void) ldi_close(zfs_lh, FREAD|FWRITE, kcred); 3527 3528 return (rc); 3529 } 3530 3531 int 3532 sbd_zvolset(char *zvol_name, char *comstarprop) 3533 { 3534 ldi_handle_t zfs_lh; 3535 nvlist_t *nv; 3536 char *packed = NULL; 3537 size_t len; 3538 zfs_cmd_t *zc; 3539 int unused; 3540 int rc; 3541 3542 if ((rc = ldi_open_by_name("/dev/zfs", FREAD | FWRITE, kcred, 3543 &zfs_lh, sbd_zfs_ident)) != 0) { 3544 cmn_err(CE_WARN, "ldi_open %d", rc); 3545 return (ENXIO); 3546 } 3547 (void) nvlist_alloc(&nv, NV_UNIQUE_NAME, KM_SLEEP); 3548 (void) nvlist_add_string(nv, "stmf_sbd_lu", comstarprop); 3549 if ((rc = nvlist_pack(nv, &packed, &len, NV_ENCODE_NATIVE, KM_SLEEP))) { 3550 goto out; 3551 } 3552 3553 zc = kmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP); 3554 (void) strlcpy(zc->zc_name, zvol_name, sizeof (zc->zc_name)); 3555 zc->zc_nvlist_src = (uint64_t)(intptr_t)packed; 3556 zc->zc_nvlist_src_size = len; 3557 rc = ldi_ioctl(zfs_lh, ZFS_IOC_SET_PROP, (intptr_t)zc, 3558 FKIOCTL, kcred, &unused); 3559 if (rc != 0) { 3560 cmn_err(CE_NOTE, "ioctl failed %d", rc); 3561 } 3562 kmem_free(zc, sizeof (zfs_cmd_t)); 3563 if (packed) 3564 kmem_free(packed, len); 3565 out: 3566 nvlist_free(nv); 3567 (void) ldi_close(zfs_lh, FREAD|FWRITE, kcred); 3568 return (rc); 3569 } 3570