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 2009 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 /* 27 * Layered driver support. 28 */ 29 30 #include <sys/atomic.h> 31 #include <sys/types.h> 32 #include <sys/t_lock.h> 33 #include <sys/param.h> 34 #include <sys/conf.h> 35 #include <sys/systm.h> 36 #include <sys/sysmacros.h> 37 #include <sys/buf.h> 38 #include <sys/cred.h> 39 #include <sys/uio.h> 40 #include <sys/vnode.h> 41 #include <sys/fs/snode.h> 42 #include <sys/open.h> 43 #include <sys/kmem.h> 44 #include <sys/file.h> 45 #include <sys/bootconf.h> 46 #include <sys/pathname.h> 47 #include <sys/bitmap.h> 48 #include <sys/stat.h> 49 #include <sys/dditypes.h> 50 #include <sys/ddi_impldefs.h> 51 #include <sys/ddi.h> 52 #include <sys/sunddi.h> 53 #include <sys/sunndi.h> 54 #include <sys/esunddi.h> 55 #include <sys/autoconf.h> 56 #include <sys/sunldi.h> 57 #include <sys/sunldi_impl.h> 58 #include <sys/errno.h> 59 #include <sys/debug.h> 60 #include <sys/modctl.h> 61 #include <sys/var.h> 62 #include <vm/seg_vn.h> 63 64 #include <sys/stropts.h> 65 #include <sys/strsubr.h> 66 #include <sys/socket.h> 67 #include <sys/socketvar.h> 68 #include <sys/kstr.h> 69 70 /* 71 * Device contract related 72 */ 73 #include <sys/contract_impl.h> 74 #include <sys/contract/device_impl.h> 75 76 /* 77 * Define macros to manipulate snode, vnode, and open device flags 78 */ 79 #define VTYP_VALID(i) (((i) == VCHR) || ((i) == VBLK)) 80 #define VTYP_TO_OTYP(i) (((i) == VCHR) ? OTYP_CHR : OTYP_BLK) 81 #define VTYP_TO_STYP(i) (((i) == VCHR) ? S_IFCHR : S_IFBLK) 82 83 #define OTYP_VALID(i) (((i) == OTYP_CHR) || ((i) == OTYP_BLK)) 84 #define OTYP_TO_VTYP(i) (((i) == OTYP_CHR) ? VCHR : VBLK) 85 #define OTYP_TO_STYP(i) (((i) == OTYP_CHR) ? S_IFCHR : S_IFBLK) 86 87 #define STYP_VALID(i) (((i) == S_IFCHR) || ((i) == S_IFBLK)) 88 #define STYP_TO_VTYP(i) (((i) == S_IFCHR) ? VCHR : VBLK) 89 90 /* 91 * Define macros for accessing layered driver hash structures 92 */ 93 #define LH_HASH(vp) (handle_hash_func(vp) % LH_HASH_SZ) 94 #define LI_HASH(mid, dip, dev) (ident_hash_func(mid, dip, dev) % LI_HASH_SZ) 95 96 /* 97 * Define layered handle flags used in the lh_type field 98 */ 99 #define LH_STREAM (0x1) /* handle to a streams device */ 100 #define LH_CBDEV (0x2) /* handle to a char/block device */ 101 102 /* 103 * Define macro for devid property lookups 104 */ 105 #define DEVID_PROP_FLAGS (DDI_PROP_DONTPASS | \ 106 DDI_PROP_TYPE_STRING|DDI_PROP_CANSLEEP) 107 108 /* 109 * Dummy string for NDI events 110 */ 111 #define NDI_EVENT_SERVICE "NDI_EVENT_SERVICE" 112 113 static void ldi_ev_lock(void); 114 static void ldi_ev_unlock(void); 115 116 #ifdef LDI_OBSOLETE_EVENT 117 int ldi_remove_event_handler(ldi_handle_t lh, ldi_callback_id_t id); 118 #endif 119 120 121 /* 122 * globals 123 */ 124 static kmutex_t ldi_ident_hash_lock[LI_HASH_SZ]; 125 static struct ldi_ident *ldi_ident_hash[LI_HASH_SZ]; 126 127 static kmutex_t ldi_handle_hash_lock[LH_HASH_SZ]; 128 static struct ldi_handle *ldi_handle_hash[LH_HASH_SZ]; 129 static size_t ldi_handle_hash_count; 130 131 static struct ldi_ev_callback_list ldi_ev_callback_list; 132 133 static uint32_t ldi_ev_id_pool = 0; 134 135 struct ldi_ev_cookie { 136 char *ck_evname; 137 uint_t ck_sync; 138 uint_t ck_ctype; 139 }; 140 141 static struct ldi_ev_cookie ldi_ev_cookies[] = { 142 { LDI_EV_OFFLINE, 1, CT_DEV_EV_OFFLINE}, 143 { LDI_EV_DEGRADE, 0, CT_DEV_EV_DEGRADED}, 144 { NULL} /* must terminate list */ 145 }; 146 147 void 148 ldi_init(void) 149 { 150 int i; 151 152 ldi_handle_hash_count = 0; 153 for (i = 0; i < LH_HASH_SZ; i++) { 154 mutex_init(&ldi_handle_hash_lock[i], NULL, MUTEX_DEFAULT, NULL); 155 ldi_handle_hash[i] = NULL; 156 } 157 for (i = 0; i < LI_HASH_SZ; i++) { 158 mutex_init(&ldi_ident_hash_lock[i], NULL, MUTEX_DEFAULT, NULL); 159 ldi_ident_hash[i] = NULL; 160 } 161 162 /* 163 * Initialize the LDI event subsystem 164 */ 165 mutex_init(&ldi_ev_callback_list.le_lock, NULL, MUTEX_DEFAULT, NULL); 166 cv_init(&ldi_ev_callback_list.le_cv, NULL, CV_DEFAULT, NULL); 167 ldi_ev_callback_list.le_busy = 0; 168 ldi_ev_callback_list.le_thread = NULL; 169 list_create(&ldi_ev_callback_list.le_head, 170 sizeof (ldi_ev_callback_impl_t), 171 offsetof(ldi_ev_callback_impl_t, lec_list)); 172 } 173 174 /* 175 * LDI ident manipulation functions 176 */ 177 static uint_t 178 ident_hash_func(modid_t modid, dev_info_t *dip, dev_t dev) 179 { 180 if (dip != NULL) { 181 uintptr_t k = (uintptr_t)dip; 182 k >>= (int)highbit(sizeof (struct dev_info)); 183 return ((uint_t)k); 184 } else if (dev != DDI_DEV_T_NONE) { 185 return (modid + getminor(dev) + getmajor(dev)); 186 } else { 187 return (modid); 188 } 189 } 190 191 static struct ldi_ident ** 192 ident_find_ref_nolock(modid_t modid, dev_info_t *dip, dev_t dev, major_t major) 193 { 194 struct ldi_ident **lipp = NULL; 195 uint_t index = LI_HASH(modid, dip, dev); 196 197 ASSERT(MUTEX_HELD(&ldi_ident_hash_lock[index])); 198 199 for (lipp = &(ldi_ident_hash[index]); 200 (*lipp != NULL); 201 lipp = &((*lipp)->li_next)) { 202 if (((*lipp)->li_modid == modid) && 203 ((*lipp)->li_major == major) && 204 ((*lipp)->li_dip == dip) && 205 ((*lipp)->li_dev == dev)) 206 break; 207 } 208 209 ASSERT(lipp != NULL); 210 return (lipp); 211 } 212 213 static struct ldi_ident * 214 ident_alloc(char *mod_name, dev_info_t *dip, dev_t dev, major_t major) 215 { 216 struct ldi_ident *lip, **lipp; 217 modid_t modid; 218 uint_t index; 219 220 ASSERT(mod_name != NULL); 221 222 /* get the module id */ 223 modid = mod_name_to_modid(mod_name); 224 ASSERT(modid != -1); 225 226 /* allocate a new ident in case we need it */ 227 lip = kmem_zalloc(sizeof (*lip), KM_SLEEP); 228 229 /* search the hash for a matching ident */ 230 index = LI_HASH(modid, dip, dev); 231 mutex_enter(&ldi_ident_hash_lock[index]); 232 lipp = ident_find_ref_nolock(modid, dip, dev, major); 233 234 if (*lipp != NULL) { 235 /* we found an ident in the hash */ 236 ASSERT(strcmp((*lipp)->li_modname, mod_name) == 0); 237 (*lipp)->li_ref++; 238 mutex_exit(&ldi_ident_hash_lock[index]); 239 kmem_free(lip, sizeof (struct ldi_ident)); 240 return (*lipp); 241 } 242 243 /* initialize the new ident */ 244 lip->li_next = NULL; 245 lip->li_ref = 1; 246 lip->li_modid = modid; 247 lip->li_major = major; 248 lip->li_dip = dip; 249 lip->li_dev = dev; 250 (void) strncpy(lip->li_modname, mod_name, sizeof (lip->li_modname) - 1); 251 252 /* add it to the ident hash */ 253 lip->li_next = ldi_ident_hash[index]; 254 ldi_ident_hash[index] = lip; 255 256 mutex_exit(&ldi_ident_hash_lock[index]); 257 return (lip); 258 } 259 260 static void 261 ident_hold(struct ldi_ident *lip) 262 { 263 uint_t index; 264 265 ASSERT(lip != NULL); 266 index = LI_HASH(lip->li_modid, lip->li_dip, lip->li_dev); 267 mutex_enter(&ldi_ident_hash_lock[index]); 268 ASSERT(lip->li_ref > 0); 269 lip->li_ref++; 270 mutex_exit(&ldi_ident_hash_lock[index]); 271 } 272 273 static void 274 ident_release(struct ldi_ident *lip) 275 { 276 struct ldi_ident **lipp; 277 uint_t index; 278 279 ASSERT(lip != NULL); 280 index = LI_HASH(lip->li_modid, lip->li_dip, lip->li_dev); 281 mutex_enter(&ldi_ident_hash_lock[index]); 282 283 ASSERT(lip->li_ref > 0); 284 if (--lip->li_ref > 0) { 285 /* there are more references to this ident */ 286 mutex_exit(&ldi_ident_hash_lock[index]); 287 return; 288 } 289 290 /* this was the last reference/open for this ident. free it. */ 291 lipp = ident_find_ref_nolock( 292 lip->li_modid, lip->li_dip, lip->li_dev, lip->li_major); 293 294 ASSERT((lipp != NULL) && (*lipp != NULL)); 295 *lipp = lip->li_next; 296 mutex_exit(&ldi_ident_hash_lock[index]); 297 kmem_free(lip, sizeof (struct ldi_ident)); 298 } 299 300 /* 301 * LDI handle manipulation functions 302 */ 303 static uint_t 304 handle_hash_func(void *vp) 305 { 306 uintptr_t k = (uintptr_t)vp; 307 k >>= (int)highbit(sizeof (vnode_t)); 308 return ((uint_t)k); 309 } 310 311 static struct ldi_handle ** 312 handle_find_ref_nolock(vnode_t *vp, struct ldi_ident *ident) 313 { 314 struct ldi_handle **lhpp = NULL; 315 uint_t index = LH_HASH(vp); 316 317 ASSERT(MUTEX_HELD(&ldi_handle_hash_lock[index])); 318 319 for (lhpp = &(ldi_handle_hash[index]); 320 (*lhpp != NULL); 321 lhpp = &((*lhpp)->lh_next)) { 322 if (((*lhpp)->lh_ident == ident) && 323 ((*lhpp)->lh_vp == vp)) 324 break; 325 } 326 327 ASSERT(lhpp != NULL); 328 return (lhpp); 329 } 330 331 static struct ldi_handle * 332 handle_find(vnode_t *vp, struct ldi_ident *ident) 333 { 334 struct ldi_handle **lhpp; 335 int index = LH_HASH(vp); 336 337 mutex_enter(&ldi_handle_hash_lock[index]); 338 lhpp = handle_find_ref_nolock(vp, ident); 339 mutex_exit(&ldi_handle_hash_lock[index]); 340 ASSERT(lhpp != NULL); 341 return (*lhpp); 342 } 343 344 static struct ldi_handle * 345 handle_alloc(vnode_t *vp, struct ldi_ident *ident) 346 { 347 struct ldi_handle *lhp, **lhpp; 348 uint_t index; 349 350 ASSERT((vp != NULL) && (ident != NULL)); 351 352 /* allocate a new handle in case we need it */ 353 lhp = kmem_zalloc(sizeof (*lhp), KM_SLEEP); 354 355 /* search the hash for a matching handle */ 356 index = LH_HASH(vp); 357 mutex_enter(&ldi_handle_hash_lock[index]); 358 lhpp = handle_find_ref_nolock(vp, ident); 359 360 if (*lhpp != NULL) { 361 /* we found a handle in the hash */ 362 (*lhpp)->lh_ref++; 363 mutex_exit(&ldi_handle_hash_lock[index]); 364 365 LDI_ALLOCFREE((CE_WARN, "ldi handle alloc: dup " 366 "lh=0x%p, ident=0x%p, vp=0x%p, drv=%s, minor=0x%x", 367 (void *)*lhpp, (void *)ident, (void *)vp, 368 mod_major_to_name(getmajor(vp->v_rdev)), 369 getminor(vp->v_rdev))); 370 371 kmem_free(lhp, sizeof (struct ldi_handle)); 372 return (*lhpp); 373 } 374 375 /* initialize the new handle */ 376 lhp->lh_ref = 1; 377 lhp->lh_vp = vp; 378 lhp->lh_ident = ident; 379 #ifdef LDI_OBSOLETE_EVENT 380 mutex_init(lhp->lh_lock, NULL, MUTEX_DEFAULT, NULL); 381 #endif 382 383 /* set the device type for this handle */ 384 lhp->lh_type = 0; 385 if (vp->v_stream) { 386 ASSERT(vp->v_type == VCHR); 387 lhp->lh_type |= LH_STREAM; 388 } else { 389 lhp->lh_type |= LH_CBDEV; 390 } 391 392 /* get holds on other objects */ 393 ident_hold(ident); 394 ASSERT(vp->v_count >= 1); 395 VN_HOLD(vp); 396 397 /* add it to the handle hash */ 398 lhp->lh_next = ldi_handle_hash[index]; 399 ldi_handle_hash[index] = lhp; 400 atomic_add_long(&ldi_handle_hash_count, 1); 401 402 LDI_ALLOCFREE((CE_WARN, "ldi handle alloc: new " 403 "lh=0x%p, ident=0x%p, vp=0x%p, drv=%s, minor=0x%x", 404 (void *)lhp, (void *)ident, (void *)vp, 405 mod_major_to_name(getmajor(vp->v_rdev)), 406 getminor(vp->v_rdev))); 407 408 mutex_exit(&ldi_handle_hash_lock[index]); 409 return (lhp); 410 } 411 412 static void 413 handle_release(struct ldi_handle *lhp) 414 { 415 struct ldi_handle **lhpp; 416 uint_t index; 417 418 ASSERT(lhp != NULL); 419 420 index = LH_HASH(lhp->lh_vp); 421 mutex_enter(&ldi_handle_hash_lock[index]); 422 423 LDI_ALLOCFREE((CE_WARN, "ldi handle release: " 424 "lh=0x%p, ident=0x%p, vp=0x%p, drv=%s, minor=0x%x", 425 (void *)lhp, (void *)lhp->lh_ident, (void *)lhp->lh_vp, 426 mod_major_to_name(getmajor(lhp->lh_vp->v_rdev)), 427 getminor(lhp->lh_vp->v_rdev))); 428 429 ASSERT(lhp->lh_ref > 0); 430 if (--lhp->lh_ref > 0) { 431 /* there are more references to this handle */ 432 mutex_exit(&ldi_handle_hash_lock[index]); 433 return; 434 } 435 436 /* this was the last reference/open for this handle. free it. */ 437 lhpp = handle_find_ref_nolock(lhp->lh_vp, lhp->lh_ident); 438 ASSERT((lhpp != NULL) && (*lhpp != NULL)); 439 *lhpp = lhp->lh_next; 440 atomic_add_long(&ldi_handle_hash_count, -1); 441 mutex_exit(&ldi_handle_hash_lock[index]); 442 443 VN_RELE(lhp->lh_vp); 444 ident_release(lhp->lh_ident); 445 #ifdef LDI_OBSOLETE_EVENT 446 mutex_destroy(lhp->lh_lock); 447 #endif 448 kmem_free(lhp, sizeof (struct ldi_handle)); 449 } 450 451 #ifdef LDI_OBSOLETE_EVENT 452 /* 453 * LDI event manipulation functions 454 */ 455 static void 456 handle_event_add(ldi_event_t *lep) 457 { 458 struct ldi_handle *lhp = lep->le_lhp; 459 460 ASSERT(lhp != NULL); 461 462 mutex_enter(lhp->lh_lock); 463 if (lhp->lh_events == NULL) { 464 lhp->lh_events = lep; 465 mutex_exit(lhp->lh_lock); 466 return; 467 } 468 469 lep->le_next = lhp->lh_events; 470 lhp->lh_events->le_prev = lep; 471 lhp->lh_events = lep; 472 mutex_exit(lhp->lh_lock); 473 } 474 475 static void 476 handle_event_remove(ldi_event_t *lep) 477 { 478 struct ldi_handle *lhp = lep->le_lhp; 479 480 ASSERT(lhp != NULL); 481 482 mutex_enter(lhp->lh_lock); 483 if (lep->le_prev) 484 lep->le_prev->le_next = lep->le_next; 485 if (lep->le_next) 486 lep->le_next->le_prev = lep->le_prev; 487 if (lhp->lh_events == lep) 488 lhp->lh_events = lep->le_next; 489 mutex_exit(lhp->lh_lock); 490 491 } 492 493 static void 494 i_ldi_callback(dev_info_t *dip, ddi_eventcookie_t event_cookie, 495 void *arg, void *bus_impldata) 496 { 497 ldi_event_t *lep = (ldi_event_t *)arg; 498 499 ASSERT(lep != NULL); 500 501 LDI_EVENTCB((CE_NOTE, "%s: dip=0x%p, " 502 "event_cookie=0x%p, ldi_eventp=0x%p", "i_ldi_callback", 503 (void *)dip, (void *)event_cookie, (void *)lep)); 504 505 lep->le_handler(lep->le_lhp, event_cookie, lep->le_arg, bus_impldata); 506 } 507 #endif 508 509 /* 510 * LDI open helper functions 511 */ 512 513 /* get a vnode to a device by dev_t and otyp */ 514 static int 515 ldi_vp_from_dev(dev_t dev, int otyp, vnode_t **vpp) 516 { 517 dev_info_t *dip; 518 vnode_t *vp; 519 520 /* sanity check required input parameters */ 521 if ((dev == DDI_DEV_T_NONE) || (!OTYP_VALID(otyp)) || (vpp == NULL)) 522 return (EINVAL); 523 524 if ((dip = e_ddi_hold_devi_by_dev(dev, 0)) == NULL) 525 return (ENODEV); 526 527 vp = makespecvp(dev, OTYP_TO_VTYP(otyp)); 528 spec_assoc_vp_with_devi(vp, dip); 529 ddi_release_devi(dip); /* from e_ddi_hold_devi_by_dev */ 530 531 *vpp = vp; 532 return (0); 533 } 534 535 /* get a vnode to a device by pathname */ 536 static int 537 ldi_vp_from_name(char *path, vnode_t **vpp) 538 { 539 vnode_t *vp = NULL; 540 int ret; 541 542 /* sanity check required input parameters */ 543 if ((path == NULL) || (vpp == NULL)) 544 return (EINVAL); 545 546 if (modrootloaded) { 547 cred_t *saved_cred = curthread->t_cred; 548 549 /* we don't want lookupname to fail because of credentials */ 550 curthread->t_cred = kcred; 551 552 /* 553 * all lookups should be done in the global zone. but 554 * lookupnameat() won't actually do this if an absolute 555 * path is passed in. since the ldi interfaces require an 556 * absolute path we pass lookupnameat() a pointer to 557 * the character after the leading '/' and tell it to 558 * start searching at the current system root directory. 559 */ 560 ASSERT(*path == '/'); 561 ret = lookupnameat(path + 1, UIO_SYSSPACE, FOLLOW, NULLVPP, 562 &vp, rootdir); 563 564 /* restore this threads credentials */ 565 curthread->t_cred = saved_cred; 566 567 if (ret == 0) { 568 if (!vn_matchops(vp, spec_getvnodeops()) || 569 !VTYP_VALID(vp->v_type)) { 570 VN_RELE(vp); 571 return (ENXIO); 572 } 573 } 574 } 575 576 if (vp == NULL) { 577 dev_info_t *dip; 578 dev_t dev; 579 int spec_type; 580 581 /* 582 * Root is not mounted, the minor node is not specified, 583 * or an OBP path has been specified. 584 */ 585 586 /* 587 * Determine if path can be pruned to produce an 588 * OBP or devfs path for resolve_pathname. 589 */ 590 if (strncmp(path, "/devices/", 9) == 0) 591 path += strlen("/devices"); 592 593 /* 594 * if no minor node was specified the DEFAULT minor node 595 * will be returned. if there is no DEFAULT minor node 596 * one will be fabricated of type S_IFCHR with the minor 597 * number equal to the instance number. 598 */ 599 ret = resolve_pathname(path, &dip, &dev, &spec_type); 600 if (ret != 0) 601 return (ENODEV); 602 603 ASSERT(STYP_VALID(spec_type)); 604 vp = makespecvp(dev, STYP_TO_VTYP(spec_type)); 605 spec_assoc_vp_with_devi(vp, dip); 606 ddi_release_devi(dip); 607 } 608 609 *vpp = vp; 610 return (0); 611 } 612 613 static int 614 ldi_devid_match(ddi_devid_t devid, dev_info_t *dip, dev_t dev) 615 { 616 char *devidstr; 617 ddi_prop_t *propp; 618 619 /* convert devid as a string property */ 620 if ((devidstr = ddi_devid_str_encode(devid, NULL)) == NULL) 621 return (0); 622 623 /* 624 * Search for the devid. For speed and ease in locking this 625 * code directly uses the property implementation. See 626 * ddi_common_devid_to_devlist() for a comment as to why. 627 */ 628 mutex_enter(&(DEVI(dip)->devi_lock)); 629 630 /* check if there is a DDI_DEV_T_NONE devid property */ 631 propp = i_ddi_prop_search(DDI_DEV_T_NONE, 632 DEVID_PROP_NAME, DEVID_PROP_FLAGS, &DEVI(dip)->devi_hw_prop_ptr); 633 if (propp != NULL) { 634 if (ddi_devid_str_compare(propp->prop_val, devidstr) == 0) { 635 /* a DDI_DEV_T_NONE devid exists and matchs */ 636 mutex_exit(&(DEVI(dip)->devi_lock)); 637 ddi_devid_str_free(devidstr); 638 return (1); 639 } else { 640 /* a DDI_DEV_T_NONE devid exists and doesn't match */ 641 mutex_exit(&(DEVI(dip)->devi_lock)); 642 ddi_devid_str_free(devidstr); 643 return (0); 644 } 645 } 646 647 /* check if there is a devt specific devid property */ 648 propp = i_ddi_prop_search(dev, 649 DEVID_PROP_NAME, DEVID_PROP_FLAGS, &(DEVI(dip)->devi_hw_prop_ptr)); 650 if (propp != NULL) { 651 if (ddi_devid_str_compare(propp->prop_val, devidstr) == 0) { 652 /* a devt specific devid exists and matchs */ 653 mutex_exit(&(DEVI(dip)->devi_lock)); 654 ddi_devid_str_free(devidstr); 655 return (1); 656 } else { 657 /* a devt specific devid exists and doesn't match */ 658 mutex_exit(&(DEVI(dip)->devi_lock)); 659 ddi_devid_str_free(devidstr); 660 return (0); 661 } 662 } 663 664 /* we didn't find any devids associated with the device */ 665 mutex_exit(&(DEVI(dip)->devi_lock)); 666 ddi_devid_str_free(devidstr); 667 return (0); 668 } 669 670 /* get a handle to a device by devid and minor name */ 671 static int 672 ldi_vp_from_devid(ddi_devid_t devid, char *minor_name, vnode_t **vpp) 673 { 674 dev_info_t *dip; 675 vnode_t *vp; 676 int ret, i, ndevs, styp; 677 dev_t dev, *devs; 678 679 /* sanity check required input parameters */ 680 if ((devid == NULL) || (minor_name == NULL) || (vpp == NULL)) 681 return (EINVAL); 682 683 ret = ddi_lyr_devid_to_devlist(devid, minor_name, &ndevs, &devs); 684 if ((ret != DDI_SUCCESS) || (ndevs <= 0)) 685 return (ENODEV); 686 687 for (i = 0; i < ndevs; i++) { 688 dev = devs[i]; 689 690 if ((dip = e_ddi_hold_devi_by_dev(dev, 0)) == NULL) 691 continue; 692 693 /* 694 * now we have to verify that the devid of the disk 695 * still matches what was requested. 696 * 697 * we have to do this because the devid could have 698 * changed between the call to ddi_lyr_devid_to_devlist() 699 * and e_ddi_hold_devi_by_dev(). this is because when 700 * ddi_lyr_devid_to_devlist() returns a list of devts 701 * there is no kind of hold on those devts so a device 702 * could have been replaced out from under us in the 703 * interim. 704 */ 705 if ((i_ddi_minorname_to_devtspectype(dip, minor_name, 706 NULL, &styp) == DDI_SUCCESS) && 707 ldi_devid_match(devid, dip, dev)) 708 break; 709 710 ddi_release_devi(dip); /* from e_ddi_hold_devi_by_dev() */ 711 } 712 713 ddi_lyr_free_devlist(devs, ndevs); 714 715 if (i == ndevs) 716 return (ENODEV); 717 718 ASSERT(STYP_VALID(styp)); 719 vp = makespecvp(dev, STYP_TO_VTYP(styp)); 720 spec_assoc_vp_with_devi(vp, dip); 721 ddi_release_devi(dip); /* from e_ddi_hold_devi_by_dev */ 722 723 *vpp = vp; 724 return (0); 725 } 726 727 /* given a vnode, open a device */ 728 static int 729 ldi_open_by_vp(vnode_t **vpp, int flag, cred_t *cr, 730 ldi_handle_t *lhp, struct ldi_ident *li) 731 { 732 struct ldi_handle *nlhp; 733 vnode_t *vp; 734 int err; 735 736 ASSERT((vpp != NULL) && (*vpp != NULL)); 737 ASSERT((lhp != NULL) && (li != NULL)); 738 739 vp = *vpp; 740 /* if the vnode passed in is not a device, then bail */ 741 if (!vn_matchops(vp, spec_getvnodeops()) || !VTYP_VALID(vp->v_type)) 742 return (ENXIO); 743 744 /* 745 * the caller may have specified a node that 746 * doesn't have cb_ops defined. the ldi doesn't yet 747 * support opening devices without a valid cb_ops. 748 */ 749 if (devopsp[getmajor(vp->v_rdev)]->devo_cb_ops == NULL) 750 return (ENXIO); 751 752 /* open the device */ 753 if ((err = VOP_OPEN(&vp, flag | FKLYR, cr, NULL)) != 0) 754 return (err); 755 756 /* possible clone open, make sure that we still have a spec node */ 757 ASSERT(vn_matchops(vp, spec_getvnodeops())); 758 759 nlhp = handle_alloc(vp, li); 760 761 if (vp != *vpp) { 762 /* 763 * allocating the layered handle took a new hold on the vnode 764 * so we can release the hold that was returned by the clone 765 * open 766 */ 767 LDI_OPENCLOSE((CE_WARN, "%s: lh=0x%p", 768 "ldi clone open", (void *)nlhp)); 769 } else { 770 LDI_OPENCLOSE((CE_WARN, "%s: lh=0x%p", 771 "ldi open", (void *)nlhp)); 772 } 773 774 *vpp = vp; 775 *lhp = (ldi_handle_t)nlhp; 776 return (0); 777 } 778 779 /* Call a drivers prop_op(9E) interface */ 780 static int 781 i_ldi_prop_op(dev_t dev, dev_info_t *dip, ddi_prop_op_t prop_op, 782 int flags, char *name, caddr_t valuep, int *lengthp) 783 { 784 struct dev_ops *ops = NULL; 785 int res; 786 787 ASSERT((dip != NULL) && (name != NULL)); 788 ASSERT((prop_op == PROP_LEN) || (valuep != NULL)); 789 ASSERT(lengthp != NULL); 790 791 /* 792 * we can only be invoked after a driver has been opened and 793 * someone has a layered handle to it, so there had better be 794 * a valid ops vector. 795 */ 796 ops = DEVI(dip)->devi_ops; 797 ASSERT(ops && ops->devo_cb_ops); 798 799 /* 800 * Some nexus drivers incorrectly set cb_prop_op to nodev, 801 * nulldev or even NULL. 802 */ 803 if ((ops->devo_cb_ops->cb_prop_op == nodev) || 804 (ops->devo_cb_ops->cb_prop_op == nulldev) || 805 (ops->devo_cb_ops->cb_prop_op == NULL)) { 806 return (DDI_PROP_NOT_FOUND); 807 } 808 809 /* check if this is actually DDI_DEV_T_ANY query */ 810 if (flags & LDI_DEV_T_ANY) { 811 flags &= ~LDI_DEV_T_ANY; 812 dev = DDI_DEV_T_ANY; 813 } 814 815 res = cdev_prop_op(dev, dip, prop_op, flags, name, valuep, lengthp); 816 return (res); 817 } 818 819 static void 820 i_ldi_prop_op_free(struct prop_driver_data *pdd) 821 { 822 kmem_free(pdd, pdd->pdd_size); 823 } 824 825 static caddr_t 826 i_ldi_prop_op_alloc(int prop_len) 827 { 828 struct prop_driver_data *pdd; 829 int pdd_size; 830 831 pdd_size = sizeof (struct prop_driver_data) + prop_len; 832 pdd = kmem_alloc(pdd_size, KM_SLEEP); 833 pdd->pdd_size = pdd_size; 834 pdd->pdd_prop_free = i_ldi_prop_op_free; 835 return ((caddr_t)&pdd[1]); 836 } 837 838 /* 839 * i_ldi_prop_op_typed() is a wrapper for i_ldi_prop_op that is used 840 * by the typed ldi property lookup interfaces. 841 */ 842 static int 843 i_ldi_prop_op_typed(dev_t dev, dev_info_t *dip, int flags, char *name, 844 caddr_t *datap, int *lengthp, int elem_size) 845 { 846 caddr_t prop_val; 847 int prop_len, res; 848 849 ASSERT((dip != NULL) && (name != NULL)); 850 ASSERT((datap != NULL) && (lengthp != NULL)); 851 852 /* 853 * first call the drivers prop_op() interface to allow it 854 * it to override default property values. 855 */ 856 res = i_ldi_prop_op(dev, dip, PROP_LEN, 857 flags | DDI_PROP_DYNAMIC, name, NULL, &prop_len); 858 if (res != DDI_PROP_SUCCESS) 859 return (DDI_PROP_NOT_FOUND); 860 861 /* sanity check the property length */ 862 if (prop_len == 0) { 863 /* 864 * the ddi typed interfaces don't allow a drivers to 865 * create properties with a length of 0. so we should 866 * prevent drivers from returning 0 length dynamic 867 * properties for typed property lookups. 868 */ 869 return (DDI_PROP_NOT_FOUND); 870 } 871 872 /* sanity check the property length against the element size */ 873 if (elem_size && ((prop_len % elem_size) != 0)) 874 return (DDI_PROP_NOT_FOUND); 875 876 /* 877 * got it. now allocate a prop_driver_data struct so that the 878 * user can free the property via ddi_prop_free(). 879 */ 880 prop_val = i_ldi_prop_op_alloc(prop_len); 881 882 /* lookup the property again, this time get the value */ 883 res = i_ldi_prop_op(dev, dip, PROP_LEN_AND_VAL_BUF, 884 flags | DDI_PROP_DYNAMIC, name, prop_val, &prop_len); 885 if (res != DDI_PROP_SUCCESS) { 886 ddi_prop_free(prop_val); 887 return (DDI_PROP_NOT_FOUND); 888 } 889 890 /* sanity check the property length */ 891 if (prop_len == 0) { 892 ddi_prop_free(prop_val); 893 return (DDI_PROP_NOT_FOUND); 894 } 895 896 /* sanity check the property length against the element size */ 897 if (elem_size && ((prop_len % elem_size) != 0)) { 898 ddi_prop_free(prop_val); 899 return (DDI_PROP_NOT_FOUND); 900 } 901 902 /* 903 * return the prop_driver_data struct and, optionally, the length 904 * of the data. 905 */ 906 *datap = prop_val; 907 *lengthp = prop_len; 908 909 return (DDI_PROP_SUCCESS); 910 } 911 912 /* 913 * i_check_string looks at a string property and makes sure its 914 * a valid null terminated string 915 */ 916 static int 917 i_check_string(char *str, int prop_len) 918 { 919 int i; 920 921 ASSERT(str != NULL); 922 923 for (i = 0; i < prop_len; i++) { 924 if (str[i] == '\0') 925 return (0); 926 } 927 return (1); 928 } 929 930 /* 931 * i_pack_string_array takes a a string array property that is represented 932 * as a concatenation of strings (with the NULL character included for 933 * each string) and converts it into a format that can be returned by 934 * ldi_prop_lookup_string_array. 935 */ 936 static int 937 i_pack_string_array(char *str_concat, int prop_len, 938 char ***str_arrayp, int *nelemp) 939 { 940 int i, nelem, pack_size; 941 char **str_array, *strptr; 942 943 /* 944 * first we need to sanity check the input string array. 945 * in essence this can be done my making sure that the last 946 * character of the array passed in is null. (meaning the last 947 * string in the array is NULL terminated. 948 */ 949 if (str_concat[prop_len - 1] != '\0') 950 return (1); 951 952 /* now let's count the number of strings in the array */ 953 for (nelem = i = 0; i < prop_len; i++) 954 if (str_concat[i] == '\0') 955 nelem++; 956 ASSERT(nelem >= 1); 957 958 /* now let's allocate memory for the new packed property */ 959 pack_size = (sizeof (char *) * (nelem + 1)) + prop_len; 960 str_array = (char **)i_ldi_prop_op_alloc(pack_size); 961 962 /* let's copy the actual string data into the new property */ 963 strptr = (char *)&(str_array[nelem + 1]); 964 bcopy(str_concat, strptr, prop_len); 965 966 /* now initialize the string array pointers */ 967 for (i = 0; i < nelem; i++) { 968 str_array[i] = strptr; 969 strptr += strlen(strptr) + 1; 970 } 971 str_array[nelem] = NULL; 972 973 /* set the return values */ 974 *str_arrayp = str_array; 975 *nelemp = nelem; 976 977 return (0); 978 } 979 980 981 /* 982 * LDI Project private device usage interfaces 983 */ 984 985 /* 986 * Get a count of how many devices are currentl open by different consumers 987 */ 988 int 989 ldi_usage_count() 990 { 991 return (ldi_handle_hash_count); 992 } 993 994 static void 995 ldi_usage_walker_tgt_helper(ldi_usage_t *ldi_usage, vnode_t *vp) 996 { 997 dev_info_t *dip; 998 dev_t dev; 999 1000 ASSERT(STYP_VALID(VTYP_TO_STYP(vp->v_type))); 1001 1002 /* get the target devt */ 1003 dev = vp->v_rdev; 1004 1005 /* try to get the target dip */ 1006 dip = VTOCS(vp)->s_dip; 1007 if (dip != NULL) { 1008 e_ddi_hold_devi(dip); 1009 } else if (dev != DDI_DEV_T_NONE) { 1010 dip = e_ddi_hold_devi_by_dev(dev, 0); 1011 } 1012 1013 /* set the target information */ 1014 ldi_usage->tgt_name = mod_major_to_name(getmajor(dev)); 1015 ldi_usage->tgt_modid = mod_name_to_modid(ldi_usage->tgt_name); 1016 ldi_usage->tgt_devt = dev; 1017 ldi_usage->tgt_spec_type = VTYP_TO_STYP(vp->v_type); 1018 ldi_usage->tgt_dip = dip; 1019 } 1020 1021 1022 static int 1023 ldi_usage_walker_helper(struct ldi_ident *lip, vnode_t *vp, 1024 void *arg, int (*callback)(const ldi_usage_t *, void *)) 1025 { 1026 ldi_usage_t ldi_usage; 1027 struct devnames *dnp; 1028 dev_info_t *dip; 1029 major_t major; 1030 dev_t dev; 1031 int ret = LDI_USAGE_CONTINUE; 1032 1033 /* set the target device information */ 1034 ldi_usage_walker_tgt_helper(&ldi_usage, vp); 1035 1036 /* get the source devt */ 1037 dev = lip->li_dev; 1038 1039 /* try to get the source dip */ 1040 dip = lip->li_dip; 1041 if (dip != NULL) { 1042 e_ddi_hold_devi(dip); 1043 } else if (dev != DDI_DEV_T_NONE) { 1044 dip = e_ddi_hold_devi_by_dev(dev, 0); 1045 } 1046 1047 /* set the valid source information */ 1048 ldi_usage.src_modid = lip->li_modid; 1049 ldi_usage.src_name = lip->li_modname; 1050 ldi_usage.src_devt = dev; 1051 ldi_usage.src_dip = dip; 1052 1053 /* 1054 * if the source ident represents either: 1055 * 1056 * - a kernel module (and not a device or device driver) 1057 * - a device node 1058 * 1059 * then we currently have all the info we need to report the 1060 * usage information so invoke the callback function. 1061 */ 1062 if (((lip->li_major == -1) && (dev == DDI_DEV_T_NONE)) || 1063 (dip != NULL)) { 1064 ret = callback(&ldi_usage, arg); 1065 if (dip != NULL) 1066 ddi_release_devi(dip); 1067 if (ldi_usage.tgt_dip != NULL) 1068 ddi_release_devi(ldi_usage.tgt_dip); 1069 return (ret); 1070 } 1071 1072 /* 1073 * now this is kinda gross. 1074 * 1075 * what we do here is attempt to associate every device instance 1076 * of the source driver on the system with the open target driver. 1077 * we do this because we don't know which instance of the device 1078 * could potentially access the lower device so we assume that all 1079 * the instances could access it. 1080 * 1081 * there are two ways we could have gotten here: 1082 * 1083 * 1) this layered ident represents one created using only a 1084 * major number or a driver module name. this means that when 1085 * it was created we could not associate it with a particular 1086 * dev_t or device instance. 1087 * 1088 * when could this possibly happen you ask? 1089 * 1090 * a perfect example of this is streams persistent links. 1091 * when a persistant streams link is formed we can't associate 1092 * the lower device stream with any particular upper device 1093 * stream or instance. this is because any particular upper 1094 * device stream could be closed, then another could be 1095 * opened with a different dev_t and device instance, and it 1096 * would still have access to the lower linked stream. 1097 * 1098 * since any instance of the upper streams driver could 1099 * potentially access the lower stream whenever it wants, 1100 * we represent that here by associating the opened lower 1101 * device with every existing device instance of the upper 1102 * streams driver. 1103 * 1104 * 2) This case should really never happen but we'll include it 1105 * for completeness. 1106 * 1107 * it's possible that we could have gotten here because we 1108 * have a dev_t for the upper device but we couldn't find a 1109 * dip associated with that dev_t. 1110 * 1111 * the only types of devices that have dev_t without an 1112 * associated dip are unbound DLPIv2 network devices. These 1113 * types of devices exist to be able to attach a stream to any 1114 * instance of a hardware network device. since these types of 1115 * devices are usually hardware devices they should never 1116 * really have other devices open. 1117 */ 1118 if (dev != DDI_DEV_T_NONE) 1119 major = getmajor(dev); 1120 else 1121 major = lip->li_major; 1122 1123 ASSERT((major >= 0) && (major < devcnt)); 1124 1125 dnp = &devnamesp[major]; 1126 LOCK_DEV_OPS(&dnp->dn_lock); 1127 dip = dnp->dn_head; 1128 while ((dip) && (ret == LDI_USAGE_CONTINUE)) { 1129 e_ddi_hold_devi(dip); 1130 UNLOCK_DEV_OPS(&dnp->dn_lock); 1131 1132 /* set the source dip */ 1133 ldi_usage.src_dip = dip; 1134 1135 /* invoke the callback function */ 1136 ret = callback(&ldi_usage, arg); 1137 1138 LOCK_DEV_OPS(&dnp->dn_lock); 1139 ddi_release_devi(dip); 1140 dip = ddi_get_next(dip); 1141 } 1142 UNLOCK_DEV_OPS(&dnp->dn_lock); 1143 1144 /* if there was a target dip, release it */ 1145 if (ldi_usage.tgt_dip != NULL) 1146 ddi_release_devi(ldi_usage.tgt_dip); 1147 1148 return (ret); 1149 } 1150 1151 /* 1152 * ldi_usage_walker() - this walker reports LDI kernel device usage 1153 * information via the callback() callback function. the LDI keeps track 1154 * of what devices are being accessed in its own internal data structures. 1155 * this function walks those data structures to determine device usage. 1156 */ 1157 void 1158 ldi_usage_walker(void *arg, int (*callback)(const ldi_usage_t *, void *)) 1159 { 1160 struct ldi_handle *lhp; 1161 struct ldi_ident *lip; 1162 vnode_t *vp; 1163 int i; 1164 int ret = LDI_USAGE_CONTINUE; 1165 1166 for (i = 0; i < LH_HASH_SZ; i++) { 1167 mutex_enter(&ldi_handle_hash_lock[i]); 1168 1169 lhp = ldi_handle_hash[i]; 1170 while ((lhp != NULL) && (ret == LDI_USAGE_CONTINUE)) { 1171 lip = lhp->lh_ident; 1172 vp = lhp->lh_vp; 1173 1174 /* invoke the devinfo callback function */ 1175 ret = ldi_usage_walker_helper(lip, vp, arg, callback); 1176 1177 lhp = lhp->lh_next; 1178 } 1179 mutex_exit(&ldi_handle_hash_lock[i]); 1180 1181 if (ret != LDI_USAGE_CONTINUE) 1182 break; 1183 } 1184 } 1185 1186 /* 1187 * LDI Project private interfaces (streams linking interfaces) 1188 * 1189 * Streams supports a type of built in device layering via linking. 1190 * Certain types of streams drivers can be streams multiplexors. 1191 * A streams multiplexor supports the I_LINK/I_PLINK operation. 1192 * These operations allows other streams devices to be linked under the 1193 * multiplexor. By definition all streams multiplexors are devices 1194 * so this linking is a type of device layering where the multiplexor 1195 * device is layered on top of the device linked below it. 1196 */ 1197 1198 /* 1199 * ldi_mlink_lh() is invoked when streams are linked using LDI handles. 1200 * It is not used for normal I_LINKs and I_PLINKs using file descriptors. 1201 * 1202 * The streams framework keeps track of links via the file_t of the lower 1203 * stream. The LDI keeps track of devices using a vnode. In the case 1204 * of a streams link created via an LDI handle, fnk_lh() allocates 1205 * a file_t that the streams framework can use to track the linkage. 1206 */ 1207 int 1208 ldi_mlink_lh(vnode_t *vp, int cmd, intptr_t arg, cred_t *crp, int *rvalp) 1209 { 1210 struct ldi_handle *lhp = (struct ldi_handle *)arg; 1211 vnode_t *vpdown; 1212 file_t *fpdown; 1213 int err; 1214 1215 if (lhp == NULL) 1216 return (EINVAL); 1217 1218 vpdown = lhp->lh_vp; 1219 ASSERT(vn_matchops(vpdown, spec_getvnodeops())); 1220 ASSERT(cmd == _I_PLINK_LH); 1221 1222 /* 1223 * create a new lower vnode and a file_t that points to it, 1224 * streams linking requires a file_t. falloc() returns with 1225 * fpdown locked. 1226 */ 1227 VN_HOLD(vpdown); 1228 (void) falloc(vpdown, FREAD|FWRITE, &fpdown, NULL); 1229 mutex_exit(&fpdown->f_tlock); 1230 1231 /* try to establish the link */ 1232 err = mlink_file(vp, I_PLINK, fpdown, crp, rvalp, 1); 1233 1234 if (err != 0) { 1235 /* the link failed, free the file_t and release the vnode */ 1236 mutex_enter(&fpdown->f_tlock); 1237 unfalloc(fpdown); 1238 VN_RELE(vpdown); 1239 } 1240 1241 return (err); 1242 } 1243 1244 /* 1245 * ldi_mlink_fp() is invoked for all successful streams linkages created 1246 * via I_LINK and I_PLINK. ldi_mlink_fp() records the linkage information 1247 * in its internal state so that the devinfo snapshot code has some 1248 * observability into streams device linkage information. 1249 */ 1250 void 1251 ldi_mlink_fp(struct stdata *stp, file_t *fpdown, int lhlink, int type) 1252 { 1253 vnode_t *vp = fpdown->f_vnode; 1254 struct snode *sp, *csp; 1255 ldi_ident_t li; 1256 major_t major; 1257 int ret; 1258 1259 /* if the lower stream is not a device then return */ 1260 if (!vn_matchops(vp, spec_getvnodeops())) 1261 return; 1262 1263 ASSERT(!servicing_interrupt()); 1264 1265 LDI_STREAMS_LNK((CE_NOTE, "%s: linking streams " 1266 "stp=0x%p, fpdown=0x%p", "ldi_mlink_fp", 1267 (void *)stp, (void *)fpdown)); 1268 1269 sp = VTOS(vp); 1270 csp = VTOS(sp->s_commonvp); 1271 1272 /* check if this was a plink via a layered handle */ 1273 if (lhlink) { 1274 /* 1275 * increment the common snode s_count. 1276 * 1277 * this is done because after the link operation there 1278 * are two ways that s_count can be decremented. 1279 * 1280 * when the layered handle used to create the link is 1281 * closed, spec_close() is called and it will decrement 1282 * s_count in the common snode. if we don't increment 1283 * s_count here then this could cause spec_close() to 1284 * actually close the device while it's still linked 1285 * under a multiplexer. 1286 * 1287 * also, when the lower stream is unlinked, closef() is 1288 * called for the file_t associated with this snode. 1289 * closef() will call spec_close(), which will decrement 1290 * s_count. if we dont't increment s_count here then this 1291 * could cause spec_close() to actually close the device 1292 * while there may still be valid layered handles 1293 * pointing to it. 1294 */ 1295 mutex_enter(&csp->s_lock); 1296 ASSERT(csp->s_count >= 1); 1297 csp->s_count++; 1298 mutex_exit(&csp->s_lock); 1299 1300 /* 1301 * decrement the f_count. 1302 * this is done because the layered driver framework does 1303 * not actually cache a copy of the file_t allocated to 1304 * do the link. this is done here instead of in ldi_mlink_lh() 1305 * because there is a window in ldi_mlink_lh() between where 1306 * milnk_file() returns and we would decrement the f_count 1307 * when the stream could be unlinked. 1308 */ 1309 mutex_enter(&fpdown->f_tlock); 1310 fpdown->f_count--; 1311 mutex_exit(&fpdown->f_tlock); 1312 } 1313 1314 /* 1315 * NOTE: here we rely on the streams subsystem not allowing 1316 * a stream to be multiplexed more than once. if this 1317 * changes, we break. 1318 * 1319 * mark the snode/stream as multiplexed 1320 */ 1321 mutex_enter(&sp->s_lock); 1322 ASSERT(!(sp->s_flag & SMUXED)); 1323 sp->s_flag |= SMUXED; 1324 mutex_exit(&sp->s_lock); 1325 1326 /* get a layered ident for the upper stream */ 1327 if (type == LINKNORMAL) { 1328 /* 1329 * if the link is not persistant then we can associate 1330 * the upper stream with a dev_t. this is because the 1331 * upper stream is associated with a vnode, which is 1332 * associated with a dev_t and this binding can't change 1333 * during the life of the stream. since the link isn't 1334 * persistant once the stream is destroyed the link is 1335 * destroyed. so the dev_t will be valid for the life 1336 * of the link. 1337 */ 1338 ret = ldi_ident_from_stream(getendq(stp->sd_wrq), &li); 1339 } else { 1340 /* 1341 * if the link is persistant we can only associate the 1342 * link with a driver (and not a dev_t.) this is 1343 * because subsequent opens of the upper device may result 1344 * in a different stream (and dev_t) having access to 1345 * the lower stream. 1346 * 1347 * for example, if the upper stream is closed after the 1348 * persistant link operation is compleated, a subsequent 1349 * open of the upper device will create a new stream which 1350 * may have a different dev_t and an unlink operation 1351 * can be performed using this new upper stream. 1352 */ 1353 ASSERT(type == LINKPERSIST); 1354 major = getmajor(stp->sd_vnode->v_rdev); 1355 ret = ldi_ident_from_major(major, &li); 1356 } 1357 1358 ASSERT(ret == 0); 1359 (void) handle_alloc(vp, (struct ldi_ident *)li); 1360 ldi_ident_release(li); 1361 } 1362 1363 void 1364 ldi_munlink_fp(struct stdata *stp, file_t *fpdown, int type) 1365 { 1366 struct ldi_handle *lhp; 1367 vnode_t *vp = (vnode_t *)fpdown->f_vnode; 1368 struct snode *sp; 1369 ldi_ident_t li; 1370 major_t major; 1371 int ret; 1372 1373 /* if the lower stream is not a device then return */ 1374 if (!vn_matchops(vp, spec_getvnodeops())) 1375 return; 1376 1377 ASSERT(!servicing_interrupt()); 1378 ASSERT((type == LINKNORMAL) || (type == LINKPERSIST)); 1379 1380 LDI_STREAMS_LNK((CE_NOTE, "%s: unlinking streams " 1381 "stp=0x%p, fpdown=0x%p", "ldi_munlink_fp", 1382 (void *)stp, (void *)fpdown)); 1383 1384 /* 1385 * NOTE: here we rely on the streams subsystem not allowing 1386 * a stream to be multiplexed more than once. if this 1387 * changes, we break. 1388 * 1389 * mark the snode/stream as not multiplexed 1390 */ 1391 sp = VTOS(vp); 1392 mutex_enter(&sp->s_lock); 1393 ASSERT(sp->s_flag & SMUXED); 1394 sp->s_flag &= ~SMUXED; 1395 mutex_exit(&sp->s_lock); 1396 1397 /* 1398 * clear the owner for this snode 1399 * see the comment in ldi_mlink_fp() for information about how 1400 * the ident is allocated 1401 */ 1402 if (type == LINKNORMAL) { 1403 ret = ldi_ident_from_stream(getendq(stp->sd_wrq), &li); 1404 } else { 1405 ASSERT(type == LINKPERSIST); 1406 major = getmajor(stp->sd_vnode->v_rdev); 1407 ret = ldi_ident_from_major(major, &li); 1408 } 1409 1410 ASSERT(ret == 0); 1411 lhp = handle_find(vp, (struct ldi_ident *)li); 1412 handle_release(lhp); 1413 ldi_ident_release(li); 1414 } 1415 1416 /* 1417 * LDI Consolidation private interfaces 1418 */ 1419 int 1420 ldi_ident_from_mod(struct modlinkage *modlp, ldi_ident_t *lip) 1421 { 1422 struct modctl *modp; 1423 major_t major; 1424 char *name; 1425 1426 if ((modlp == NULL) || (lip == NULL)) 1427 return (EINVAL); 1428 1429 ASSERT(!servicing_interrupt()); 1430 1431 modp = mod_getctl(modlp); 1432 if (modp == NULL) 1433 return (EINVAL); 1434 name = modp->mod_modname; 1435 if (name == NULL) 1436 return (EINVAL); 1437 major = mod_name_to_major(name); 1438 1439 *lip = (ldi_ident_t)ident_alloc(name, NULL, DDI_DEV_T_NONE, major); 1440 1441 LDI_ALLOCFREE((CE_WARN, "%s: li=0x%p, mod=%s", 1442 "ldi_ident_from_mod", (void *)*lip, name)); 1443 1444 return (0); 1445 } 1446 1447 ldi_ident_t 1448 ldi_ident_from_anon() 1449 { 1450 ldi_ident_t lip; 1451 1452 ASSERT(!servicing_interrupt()); 1453 1454 lip = (ldi_ident_t)ident_alloc("genunix", NULL, DDI_DEV_T_NONE, -1); 1455 1456 LDI_ALLOCFREE((CE_WARN, "%s: li=0x%p, mod=%s", 1457 "ldi_ident_from_anon", (void *)lip, "genunix")); 1458 1459 return (lip); 1460 } 1461 1462 1463 /* 1464 * LDI Public interfaces 1465 */ 1466 int 1467 ldi_ident_from_stream(struct queue *sq, ldi_ident_t *lip) 1468 { 1469 struct stdata *stp; 1470 dev_t dev; 1471 char *name; 1472 1473 if ((sq == NULL) || (lip == NULL)) 1474 return (EINVAL); 1475 1476 ASSERT(!servicing_interrupt()); 1477 1478 stp = sq->q_stream; 1479 if (!vn_matchops(stp->sd_vnode, spec_getvnodeops())) 1480 return (EINVAL); 1481 1482 dev = stp->sd_vnode->v_rdev; 1483 name = mod_major_to_name(getmajor(dev)); 1484 if (name == NULL) 1485 return (EINVAL); 1486 *lip = (ldi_ident_t)ident_alloc(name, NULL, dev, -1); 1487 1488 LDI_ALLOCFREE((CE_WARN, 1489 "%s: li=0x%p, mod=%s, minor=0x%x, stp=0x%p", 1490 "ldi_ident_from_stream", (void *)*lip, name, getminor(dev), 1491 (void *)stp)); 1492 1493 return (0); 1494 } 1495 1496 int 1497 ldi_ident_from_dev(dev_t dev, ldi_ident_t *lip) 1498 { 1499 char *name; 1500 1501 if (lip == NULL) 1502 return (EINVAL); 1503 1504 ASSERT(!servicing_interrupt()); 1505 1506 name = mod_major_to_name(getmajor(dev)); 1507 if (name == NULL) 1508 return (EINVAL); 1509 *lip = (ldi_ident_t)ident_alloc(name, NULL, dev, -1); 1510 1511 LDI_ALLOCFREE((CE_WARN, 1512 "%s: li=0x%p, mod=%s, minor=0x%x", 1513 "ldi_ident_from_dev", (void *)*lip, name, getminor(dev))); 1514 1515 return (0); 1516 } 1517 1518 int 1519 ldi_ident_from_dip(dev_info_t *dip, ldi_ident_t *lip) 1520 { 1521 struct dev_info *devi = (struct dev_info *)dip; 1522 char *name; 1523 1524 if ((dip == NULL) || (lip == NULL)) 1525 return (EINVAL); 1526 1527 ASSERT(!servicing_interrupt()); 1528 1529 name = mod_major_to_name(devi->devi_major); 1530 if (name == NULL) 1531 return (EINVAL); 1532 *lip = (ldi_ident_t)ident_alloc(name, dip, DDI_DEV_T_NONE, -1); 1533 1534 LDI_ALLOCFREE((CE_WARN, 1535 "%s: li=0x%p, mod=%s, dip=0x%p", 1536 "ldi_ident_from_dip", (void *)*lip, name, (void *)devi)); 1537 1538 return (0); 1539 } 1540 1541 int 1542 ldi_ident_from_major(major_t major, ldi_ident_t *lip) 1543 { 1544 char *name; 1545 1546 if (lip == NULL) 1547 return (EINVAL); 1548 1549 ASSERT(!servicing_interrupt()); 1550 1551 name = mod_major_to_name(major); 1552 if (name == NULL) 1553 return (EINVAL); 1554 *lip = (ldi_ident_t)ident_alloc(name, NULL, DDI_DEV_T_NONE, major); 1555 1556 LDI_ALLOCFREE((CE_WARN, 1557 "%s: li=0x%p, mod=%s", 1558 "ldi_ident_from_major", (void *)*lip, name)); 1559 1560 return (0); 1561 } 1562 1563 void 1564 ldi_ident_release(ldi_ident_t li) 1565 { 1566 struct ldi_ident *ident = (struct ldi_ident *)li; 1567 char *name; 1568 1569 if (li == NULL) 1570 return; 1571 1572 ASSERT(!servicing_interrupt()); 1573 1574 name = ident->li_modname; 1575 1576 LDI_ALLOCFREE((CE_WARN, 1577 "%s: li=0x%p, mod=%s", 1578 "ldi_ident_release", (void *)li, name)); 1579 1580 ident_release((struct ldi_ident *)li); 1581 } 1582 1583 /* get a handle to a device by dev_t and otyp */ 1584 int 1585 ldi_open_by_dev(dev_t *devp, int otyp, int flag, cred_t *cr, 1586 ldi_handle_t *lhp, ldi_ident_t li) 1587 { 1588 struct ldi_ident *lip = (struct ldi_ident *)li; 1589 int ret; 1590 vnode_t *vp; 1591 1592 /* sanity check required input parameters */ 1593 if ((devp == NULL) || (!OTYP_VALID(otyp)) || (cr == NULL) || 1594 (lhp == NULL) || (lip == NULL)) 1595 return (EINVAL); 1596 1597 ASSERT(!servicing_interrupt()); 1598 1599 if ((ret = ldi_vp_from_dev(*devp, otyp, &vp)) != 0) 1600 return (ret); 1601 1602 if ((ret = ldi_open_by_vp(&vp, flag, cr, lhp, lip)) == 0) { 1603 *devp = vp->v_rdev; 1604 } 1605 VN_RELE(vp); 1606 1607 return (ret); 1608 } 1609 1610 /* get a handle to a device by pathname */ 1611 int 1612 ldi_open_by_name(char *pathname, int flag, cred_t *cr, 1613 ldi_handle_t *lhp, ldi_ident_t li) 1614 { 1615 struct ldi_ident *lip = (struct ldi_ident *)li; 1616 int ret; 1617 vnode_t *vp; 1618 1619 /* sanity check required input parameters */ 1620 if ((pathname == NULL) || (*pathname != '/') || 1621 (cr == NULL) || (lhp == NULL) || (lip == NULL)) 1622 return (EINVAL); 1623 1624 ASSERT(!servicing_interrupt()); 1625 1626 if ((ret = ldi_vp_from_name(pathname, &vp)) != 0) 1627 return (ret); 1628 1629 ret = ldi_open_by_vp(&vp, flag, cr, lhp, lip); 1630 VN_RELE(vp); 1631 1632 return (ret); 1633 } 1634 1635 /* get a handle to a device by devid and minor_name */ 1636 int 1637 ldi_open_by_devid(ddi_devid_t devid, char *minor_name, 1638 int flag, cred_t *cr, ldi_handle_t *lhp, ldi_ident_t li) 1639 { 1640 struct ldi_ident *lip = (struct ldi_ident *)li; 1641 int ret; 1642 vnode_t *vp; 1643 1644 /* sanity check required input parameters */ 1645 if ((minor_name == NULL) || (cr == NULL) || 1646 (lhp == NULL) || (lip == NULL)) 1647 return (EINVAL); 1648 1649 ASSERT(!servicing_interrupt()); 1650 1651 if ((ret = ldi_vp_from_devid(devid, minor_name, &vp)) != 0) 1652 return (ret); 1653 1654 ret = ldi_open_by_vp(&vp, flag, cr, lhp, lip); 1655 VN_RELE(vp); 1656 1657 return (ret); 1658 } 1659 1660 int 1661 ldi_close(ldi_handle_t lh, int flag, cred_t *cr) 1662 { 1663 struct ldi_handle *handlep = (struct ldi_handle *)lh; 1664 struct ldi_event *lep; 1665 int err = 0; 1666 int notify = 0; 1667 list_t *listp; 1668 ldi_ev_callback_impl_t *lecp; 1669 1670 if (lh == NULL) 1671 return (EINVAL); 1672 1673 ASSERT(!servicing_interrupt()); 1674 1675 #ifdef LDI_OBSOLETE_EVENT 1676 1677 /* 1678 * Any event handlers should have been unregistered by the 1679 * time ldi_close() is called. If they haven't then it's a 1680 * bug. 1681 * 1682 * In a debug kernel we'll panic to make the problem obvious. 1683 */ 1684 ASSERT(handlep->lh_events == NULL); 1685 1686 /* 1687 * On a production kernel we'll "do the right thing" (unregister 1688 * the event handlers) and then complain about having to do the 1689 * work ourselves. 1690 */ 1691 while ((lep = handlep->lh_events) != NULL) { 1692 err = 1; 1693 (void) ldi_remove_event_handler(lh, (ldi_callback_id_t)lep); 1694 } 1695 if (err) { 1696 struct ldi_ident *lip = handlep->lh_ident; 1697 ASSERT(lip != NULL); 1698 cmn_err(CE_NOTE, "ldi err: %s " 1699 "failed to unregister layered event handlers before " 1700 "closing devices", lip->li_modname); 1701 } 1702 #endif 1703 1704 /* do a layered close on the device */ 1705 err = VOP_CLOSE(handlep->lh_vp, flag | FKLYR, 1, (offset_t)0, cr, NULL); 1706 1707 LDI_OPENCLOSE((CE_WARN, "%s: lh=0x%p", "ldi close", (void *)lh)); 1708 1709 /* 1710 * Search the event callback list for callbacks with this 1711 * handle. There are 2 cases 1712 * 1. Called in the context of a notify. The handle consumer 1713 * is releasing its hold on the device to allow a reconfiguration 1714 * of the device. Simply NULL out the handle and the notify callback. 1715 * The finalize callback is still available so that the consumer 1716 * knows of the final disposition of the device. 1717 * 2. Not called in the context of notify. NULL out the handle as well 1718 * as the notify and finalize callbacks. Since the consumer has 1719 * closed the handle, we assume it is not interested in the 1720 * notify and finalize callbacks. 1721 */ 1722 ldi_ev_lock(); 1723 1724 if (handlep->lh_flags & LH_FLAGS_NOTIFY) 1725 notify = 1; 1726 listp = &ldi_ev_callback_list.le_head; 1727 for (lecp = list_head(listp); lecp; lecp = list_next(listp, lecp)) { 1728 if (lecp->lec_lhp != handlep) 1729 continue; 1730 lecp->lec_lhp = NULL; 1731 lecp->lec_notify = NULL; 1732 LDI_EVDBG((CE_NOTE, "ldi_close: NULLed lh and notify")); 1733 if (!notify) { 1734 LDI_EVDBG((CE_NOTE, "ldi_close: NULLed finalize")); 1735 lecp->lec_finalize = NULL; 1736 } 1737 } 1738 1739 if (notify) 1740 handlep->lh_flags &= ~LH_FLAGS_NOTIFY; 1741 ldi_ev_unlock(); 1742 1743 /* 1744 * Free the handle even if the device close failed. why? 1745 * 1746 * If the device close failed we can't really make assumptions 1747 * about the devices state so we shouldn't allow access to the 1748 * device via this handle any more. If the device consumer wants 1749 * to access the device again they should open it again. 1750 * 1751 * This is the same way file/device close failures are handled 1752 * in other places like spec_close() and closeandsetf(). 1753 */ 1754 handle_release(handlep); 1755 return (err); 1756 } 1757 1758 int 1759 ldi_read(ldi_handle_t lh, struct uio *uiop, cred_t *credp) 1760 { 1761 struct ldi_handle *handlep = (struct ldi_handle *)lh; 1762 vnode_t *vp; 1763 dev_t dev; 1764 int ret; 1765 1766 if (lh == NULL) 1767 return (EINVAL); 1768 1769 vp = handlep->lh_vp; 1770 dev = vp->v_rdev; 1771 if (handlep->lh_type & LH_CBDEV) { 1772 ret = cdev_read(dev, uiop, credp); 1773 } else if (handlep->lh_type & LH_STREAM) { 1774 ret = strread(vp, uiop, credp); 1775 } else { 1776 return (ENOTSUP); 1777 } 1778 return (ret); 1779 } 1780 1781 int 1782 ldi_write(ldi_handle_t lh, struct uio *uiop, cred_t *credp) 1783 { 1784 struct ldi_handle *handlep = (struct ldi_handle *)lh; 1785 vnode_t *vp; 1786 dev_t dev; 1787 int ret; 1788 1789 if (lh == NULL) 1790 return (EINVAL); 1791 1792 vp = handlep->lh_vp; 1793 dev = vp->v_rdev; 1794 if (handlep->lh_type & LH_CBDEV) { 1795 ret = cdev_write(dev, uiop, credp); 1796 } else if (handlep->lh_type & LH_STREAM) { 1797 ret = strwrite(vp, uiop, credp); 1798 } else { 1799 return (ENOTSUP); 1800 } 1801 return (ret); 1802 } 1803 1804 int 1805 ldi_get_size(ldi_handle_t lh, uint64_t *sizep) 1806 { 1807 int otyp; 1808 uint_t value; 1809 int64_t drv_prop64; 1810 struct ldi_handle *handlep = (struct ldi_handle *)lh; 1811 uint_t blksize; 1812 int blkshift; 1813 1814 1815 if ((lh == NULL) || (sizep == NULL)) 1816 return (DDI_FAILURE); 1817 1818 if (handlep->lh_type & LH_STREAM) 1819 return (DDI_FAILURE); 1820 1821 /* 1822 * Determine device type (char or block). 1823 * Character devices support Size/size 1824 * property value. Block devices may support 1825 * Nblocks/nblocks or Size/size property value. 1826 */ 1827 if ((ldi_get_otyp(lh, &otyp)) != 0) 1828 return (DDI_FAILURE); 1829 1830 if (otyp == OTYP_BLK) { 1831 if (ldi_prop_exists(lh, 1832 DDI_PROP_DONTPASS | DDI_PROP_NOTPROM, "Nblocks")) { 1833 1834 drv_prop64 = ldi_prop_get_int64(lh, 1835 DDI_PROP_DONTPASS | DDI_PROP_NOTPROM, 1836 "Nblocks", 0); 1837 blksize = ldi_prop_get_int(lh, 1838 DDI_PROP_DONTPASS | DDI_PROP_NOTPROM, 1839 "blksize", DEV_BSIZE); 1840 if (blksize == DEV_BSIZE) 1841 blksize = ldi_prop_get_int(lh, LDI_DEV_T_ANY | 1842 DDI_PROP_DONTPASS | DDI_PROP_NOTPROM, 1843 "device-blksize", DEV_BSIZE); 1844 1845 /* blksize must be a power of two */ 1846 ASSERT(BIT_ONLYONESET(blksize)); 1847 blkshift = highbit(blksize) - 1; 1848 1849 /* 1850 * We don't support Nblocks values that don't have 1851 * an accurate uint64_t byte count representation. 1852 */ 1853 if ((uint64_t)drv_prop64 >= (UINT64_MAX >> blkshift)) 1854 return (DDI_FAILURE); 1855 1856 *sizep = (uint64_t) 1857 (((u_offset_t)drv_prop64) << blkshift); 1858 return (DDI_SUCCESS); 1859 } 1860 1861 if (ldi_prop_exists(lh, 1862 DDI_PROP_DONTPASS | DDI_PROP_NOTPROM, "nblocks")) { 1863 1864 value = ldi_prop_get_int(lh, 1865 DDI_PROP_DONTPASS | DDI_PROP_NOTPROM, 1866 "nblocks", 0); 1867 blksize = ldi_prop_get_int(lh, 1868 DDI_PROP_DONTPASS | DDI_PROP_NOTPROM, 1869 "blksize", DEV_BSIZE); 1870 if (blksize == DEV_BSIZE) 1871 blksize = ldi_prop_get_int(lh, LDI_DEV_T_ANY | 1872 DDI_PROP_DONTPASS | DDI_PROP_NOTPROM, 1873 "device-blksize", DEV_BSIZE); 1874 1875 /* blksize must be a power of two */ 1876 ASSERT(BIT_ONLYONESET(blksize)); 1877 blkshift = highbit(blksize) - 1; 1878 1879 /* 1880 * We don't support nblocks values that don't have an 1881 * accurate uint64_t byte count representation. 1882 */ 1883 if ((uint64_t)value >= (UINT64_MAX >> blkshift)) 1884 return (DDI_FAILURE); 1885 1886 *sizep = (uint64_t) 1887 (((u_offset_t)value) << blkshift); 1888 return (DDI_SUCCESS); 1889 } 1890 } 1891 1892 if (ldi_prop_exists(lh, 1893 DDI_PROP_DONTPASS | DDI_PROP_NOTPROM, "Size")) { 1894 1895 drv_prop64 = ldi_prop_get_int64(lh, 1896 DDI_PROP_DONTPASS | DDI_PROP_NOTPROM, "Size", 0); 1897 *sizep = (uint64_t)drv_prop64; 1898 return (DDI_SUCCESS); 1899 } 1900 1901 if (ldi_prop_exists(lh, 1902 DDI_PROP_DONTPASS | DDI_PROP_NOTPROM, "size")) { 1903 1904 value = ldi_prop_get_int(lh, 1905 DDI_PROP_DONTPASS | DDI_PROP_NOTPROM, "size", 0); 1906 *sizep = (uint64_t)value; 1907 return (DDI_SUCCESS); 1908 } 1909 1910 /* unable to determine device size */ 1911 return (DDI_FAILURE); 1912 } 1913 1914 int 1915 ldi_ioctl(ldi_handle_t lh, int cmd, intptr_t arg, int mode, 1916 cred_t *cr, int *rvalp) 1917 { 1918 struct ldi_handle *handlep = (struct ldi_handle *)lh; 1919 vnode_t *vp; 1920 dev_t dev; 1921 int ret, copymode; 1922 1923 if (lh == NULL) 1924 return (EINVAL); 1925 1926 /* 1927 * if the data pointed to by arg is located in the kernel then 1928 * make sure the FNATIVE flag is set. 1929 */ 1930 if (mode & FKIOCTL) 1931 mode = (mode & ~FMODELS) | FNATIVE | FKIOCTL; 1932 1933 vp = handlep->lh_vp; 1934 dev = vp->v_rdev; 1935 if (handlep->lh_type & LH_CBDEV) { 1936 ret = cdev_ioctl(dev, cmd, arg, mode, cr, rvalp); 1937 } else if (handlep->lh_type & LH_STREAM) { 1938 copymode = (mode & FKIOCTL) ? K_TO_K : U_TO_K; 1939 1940 /* 1941 * if we get an I_PLINK from within the kernel the 1942 * arg is a layered handle pointer instead of 1943 * a file descriptor, so we translate this ioctl 1944 * into a private one that can handle this. 1945 */ 1946 if ((mode & FKIOCTL) && (cmd == I_PLINK)) 1947 cmd = _I_PLINK_LH; 1948 1949 ret = strioctl(vp, cmd, arg, mode, copymode, cr, rvalp); 1950 } else { 1951 return (ENOTSUP); 1952 } 1953 1954 return (ret); 1955 } 1956 1957 int 1958 ldi_poll(ldi_handle_t lh, short events, int anyyet, short *reventsp, 1959 struct pollhead **phpp) 1960 { 1961 struct ldi_handle *handlep = (struct ldi_handle *)lh; 1962 vnode_t *vp; 1963 dev_t dev; 1964 int ret; 1965 1966 if (lh == NULL) 1967 return (EINVAL); 1968 1969 vp = handlep->lh_vp; 1970 dev = vp->v_rdev; 1971 if (handlep->lh_type & LH_CBDEV) { 1972 ret = cdev_poll(dev, events, anyyet, reventsp, phpp); 1973 } else if (handlep->lh_type & LH_STREAM) { 1974 ret = strpoll(vp->v_stream, events, anyyet, reventsp, phpp); 1975 } else { 1976 return (ENOTSUP); 1977 } 1978 1979 return (ret); 1980 } 1981 1982 int 1983 ldi_prop_op(ldi_handle_t lh, ddi_prop_op_t prop_op, 1984 int flags, char *name, caddr_t valuep, int *length) 1985 { 1986 struct ldi_handle *handlep = (struct ldi_handle *)lh; 1987 dev_t dev; 1988 dev_info_t *dip; 1989 int ret; 1990 struct snode *csp; 1991 1992 if ((lh == NULL) || (name == NULL) || (strlen(name) == 0)) 1993 return (DDI_PROP_INVAL_ARG); 1994 1995 if ((prop_op != PROP_LEN) && (valuep == NULL)) 1996 return (DDI_PROP_INVAL_ARG); 1997 1998 if (length == NULL) 1999 return (DDI_PROP_INVAL_ARG); 2000 2001 /* 2002 * try to find the associated dip, 2003 * this places a hold on the driver 2004 */ 2005 dev = handlep->lh_vp->v_rdev; 2006 2007 csp = VTOCS(handlep->lh_vp); 2008 mutex_enter(&csp->s_lock); 2009 if ((dip = csp->s_dip) != NULL) 2010 e_ddi_hold_devi(dip); 2011 mutex_exit(&csp->s_lock); 2012 if (dip == NULL) 2013 dip = e_ddi_hold_devi_by_dev(dev, 0); 2014 2015 if (dip == NULL) 2016 return (DDI_PROP_NOT_FOUND); 2017 2018 ret = i_ldi_prop_op(dev, dip, prop_op, flags, name, valuep, length); 2019 ddi_release_devi(dip); 2020 2021 return (ret); 2022 } 2023 2024 int 2025 ldi_strategy(ldi_handle_t lh, struct buf *bp) 2026 { 2027 struct ldi_handle *handlep = (struct ldi_handle *)lh; 2028 dev_t dev; 2029 2030 if ((lh == NULL) || (bp == NULL)) 2031 return (EINVAL); 2032 2033 /* this entry point is only supported for cb devices */ 2034 dev = handlep->lh_vp->v_rdev; 2035 if (!(handlep->lh_type & LH_CBDEV)) 2036 return (ENOTSUP); 2037 2038 bp->b_edev = dev; 2039 bp->b_dev = cmpdev(dev); 2040 return (bdev_strategy(bp)); 2041 } 2042 2043 int 2044 ldi_dump(ldi_handle_t lh, caddr_t addr, daddr_t blkno, int nblk) 2045 { 2046 struct ldi_handle *handlep = (struct ldi_handle *)lh; 2047 dev_t dev; 2048 2049 if (lh == NULL) 2050 return (EINVAL); 2051 2052 /* this entry point is only supported for cb devices */ 2053 dev = handlep->lh_vp->v_rdev; 2054 if (!(handlep->lh_type & LH_CBDEV)) 2055 return (ENOTSUP); 2056 2057 return (bdev_dump(dev, addr, blkno, nblk)); 2058 } 2059 2060 int 2061 ldi_devmap(ldi_handle_t lh, devmap_cookie_t dhp, offset_t off, 2062 size_t len, size_t *maplen, uint_t model) 2063 { 2064 struct ldi_handle *handlep = (struct ldi_handle *)lh; 2065 dev_t dev; 2066 2067 if (lh == NULL) 2068 return (EINVAL); 2069 2070 /* this entry point is only supported for cb devices */ 2071 dev = handlep->lh_vp->v_rdev; 2072 if (!(handlep->lh_type & LH_CBDEV)) 2073 return (ENOTSUP); 2074 2075 return (cdev_devmap(dev, dhp, off, len, maplen, model)); 2076 } 2077 2078 int 2079 ldi_aread(ldi_handle_t lh, struct aio_req *aio_reqp, cred_t *cr) 2080 { 2081 struct ldi_handle *handlep = (struct ldi_handle *)lh; 2082 dev_t dev; 2083 struct cb_ops *cb; 2084 2085 if (lh == NULL) 2086 return (EINVAL); 2087 2088 /* this entry point is only supported for cb devices */ 2089 if (!(handlep->lh_type & LH_CBDEV)) 2090 return (ENOTSUP); 2091 2092 /* 2093 * Kaio is only supported on block devices. 2094 */ 2095 dev = handlep->lh_vp->v_rdev; 2096 cb = devopsp[getmajor(dev)]->devo_cb_ops; 2097 if (cb->cb_strategy == nodev || cb->cb_strategy == NULL) 2098 return (ENOTSUP); 2099 2100 if (cb->cb_aread == NULL) 2101 return (ENOTSUP); 2102 2103 return (cb->cb_aread(dev, aio_reqp, cr)); 2104 } 2105 2106 int 2107 ldi_awrite(ldi_handle_t lh, struct aio_req *aio_reqp, cred_t *cr) 2108 { 2109 struct ldi_handle *handlep = (struct ldi_handle *)lh; 2110 struct cb_ops *cb; 2111 dev_t dev; 2112 2113 if (lh == NULL) 2114 return (EINVAL); 2115 2116 /* this entry point is only supported for cb devices */ 2117 if (!(handlep->lh_type & LH_CBDEV)) 2118 return (ENOTSUP); 2119 2120 /* 2121 * Kaio is only supported on block devices. 2122 */ 2123 dev = handlep->lh_vp->v_rdev; 2124 cb = devopsp[getmajor(dev)]->devo_cb_ops; 2125 if (cb->cb_strategy == nodev || cb->cb_strategy == NULL) 2126 return (ENOTSUP); 2127 2128 if (cb->cb_awrite == NULL) 2129 return (ENOTSUP); 2130 2131 return (cb->cb_awrite(dev, aio_reqp, cr)); 2132 } 2133 2134 int 2135 ldi_putmsg(ldi_handle_t lh, mblk_t *smp) 2136 { 2137 struct ldi_handle *handlep = (struct ldi_handle *)lh; 2138 int ret; 2139 2140 if ((lh == NULL) || (smp == NULL)) 2141 return (EINVAL); 2142 2143 if (!(handlep->lh_type & LH_STREAM)) { 2144 freemsg(smp); 2145 return (ENOTSUP); 2146 } 2147 2148 /* 2149 * If we don't have db_credp, set it. Note that we can not be called 2150 * from interrupt context. 2151 */ 2152 if (msg_getcred(smp, NULL) == NULL) 2153 mblk_setcred(smp, CRED(), curproc->p_pid); 2154 2155 /* Send message while honoring flow control */ 2156 ret = kstrputmsg(handlep->lh_vp, smp, NULL, 0, 0, 2157 MSG_BAND | MSG_HOLDSIG | MSG_IGNERROR, 0); 2158 2159 return (ret); 2160 } 2161 2162 int 2163 ldi_getmsg(ldi_handle_t lh, mblk_t **rmp, timestruc_t *timeo) 2164 { 2165 struct ldi_handle *handlep = (struct ldi_handle *)lh; 2166 clock_t timout; /* milliseconds */ 2167 uchar_t pri; 2168 rval_t rval; 2169 int ret, pflag; 2170 2171 2172 if (lh == NULL) 2173 return (EINVAL); 2174 2175 if (!(handlep->lh_type & LH_STREAM)) 2176 return (ENOTSUP); 2177 2178 /* Convert from nanoseconds to milliseconds */ 2179 if (timeo != NULL) { 2180 timout = timeo->tv_sec * 1000 + timeo->tv_nsec / 1000000; 2181 if (timout > INT_MAX) 2182 return (EINVAL); 2183 } else 2184 timout = -1; 2185 2186 /* Wait for timeout millseconds for a message */ 2187 pflag = MSG_ANY; 2188 pri = 0; 2189 *rmp = NULL; 2190 ret = kstrgetmsg(handlep->lh_vp, 2191 rmp, NULL, &pri, &pflag, timout, &rval); 2192 return (ret); 2193 } 2194 2195 int 2196 ldi_get_dev(ldi_handle_t lh, dev_t *devp) 2197 { 2198 struct ldi_handle *handlep = (struct ldi_handle *)lh; 2199 2200 if ((lh == NULL) || (devp == NULL)) 2201 return (EINVAL); 2202 2203 *devp = handlep->lh_vp->v_rdev; 2204 return (0); 2205 } 2206 2207 int 2208 ldi_get_otyp(ldi_handle_t lh, int *otyp) 2209 { 2210 struct ldi_handle *handlep = (struct ldi_handle *)lh; 2211 2212 if ((lh == NULL) || (otyp == NULL)) 2213 return (EINVAL); 2214 2215 *otyp = VTYP_TO_OTYP(handlep->lh_vp->v_type); 2216 return (0); 2217 } 2218 2219 int 2220 ldi_get_devid(ldi_handle_t lh, ddi_devid_t *devid) 2221 { 2222 struct ldi_handle *handlep = (struct ldi_handle *)lh; 2223 int ret; 2224 dev_t dev; 2225 2226 if ((lh == NULL) || (devid == NULL)) 2227 return (EINVAL); 2228 2229 dev = handlep->lh_vp->v_rdev; 2230 2231 ret = ddi_lyr_get_devid(dev, devid); 2232 if (ret != DDI_SUCCESS) 2233 return (ENOTSUP); 2234 2235 return (0); 2236 } 2237 2238 int 2239 ldi_get_minor_name(ldi_handle_t lh, char **minor_name) 2240 { 2241 struct ldi_handle *handlep = (struct ldi_handle *)lh; 2242 int ret, otyp; 2243 dev_t dev; 2244 2245 if ((lh == NULL) || (minor_name == NULL)) 2246 return (EINVAL); 2247 2248 dev = handlep->lh_vp->v_rdev; 2249 otyp = VTYP_TO_OTYP(handlep->lh_vp->v_type); 2250 2251 ret = ddi_lyr_get_minor_name(dev, OTYP_TO_STYP(otyp), minor_name); 2252 if (ret != DDI_SUCCESS) 2253 return (ENOTSUP); 2254 2255 return (0); 2256 } 2257 2258 int 2259 ldi_prop_lookup_int_array(ldi_handle_t lh, 2260 uint_t flags, char *name, int **data, uint_t *nelements) 2261 { 2262 struct ldi_handle *handlep = (struct ldi_handle *)lh; 2263 dev_info_t *dip; 2264 dev_t dev; 2265 int res; 2266 struct snode *csp; 2267 2268 if ((lh == NULL) || (name == NULL) || (strlen(name) == 0)) 2269 return (DDI_PROP_INVAL_ARG); 2270 2271 dev = handlep->lh_vp->v_rdev; 2272 2273 csp = VTOCS(handlep->lh_vp); 2274 mutex_enter(&csp->s_lock); 2275 if ((dip = csp->s_dip) != NULL) 2276 e_ddi_hold_devi(dip); 2277 mutex_exit(&csp->s_lock); 2278 if (dip == NULL) 2279 dip = e_ddi_hold_devi_by_dev(dev, 0); 2280 2281 if (dip == NULL) { 2282 flags |= DDI_UNBND_DLPI2; 2283 } else if (flags & LDI_DEV_T_ANY) { 2284 flags &= ~LDI_DEV_T_ANY; 2285 dev = DDI_DEV_T_ANY; 2286 } 2287 2288 if (dip != NULL) { 2289 int *prop_val, prop_len; 2290 2291 res = i_ldi_prop_op_typed(dev, dip, flags, name, 2292 (caddr_t *)&prop_val, &prop_len, sizeof (int)); 2293 2294 /* if we got it then return it */ 2295 if (res == DDI_PROP_SUCCESS) { 2296 *nelements = prop_len / sizeof (int); 2297 *data = prop_val; 2298 2299 ddi_release_devi(dip); 2300 return (res); 2301 } 2302 } 2303 2304 /* call the normal property interfaces */ 2305 res = ddi_prop_lookup_int_array(dev, dip, flags, 2306 name, data, nelements); 2307 2308 if (dip != NULL) 2309 ddi_release_devi(dip); 2310 2311 return (res); 2312 } 2313 2314 int 2315 ldi_prop_lookup_int64_array(ldi_handle_t lh, 2316 uint_t flags, char *name, int64_t **data, uint_t *nelements) 2317 { 2318 struct ldi_handle *handlep = (struct ldi_handle *)lh; 2319 dev_info_t *dip; 2320 dev_t dev; 2321 int res; 2322 struct snode *csp; 2323 2324 if ((lh == NULL) || (name == NULL) || (strlen(name) == 0)) 2325 return (DDI_PROP_INVAL_ARG); 2326 2327 dev = handlep->lh_vp->v_rdev; 2328 2329 csp = VTOCS(handlep->lh_vp); 2330 mutex_enter(&csp->s_lock); 2331 if ((dip = csp->s_dip) != NULL) 2332 e_ddi_hold_devi(dip); 2333 mutex_exit(&csp->s_lock); 2334 if (dip == NULL) 2335 dip = e_ddi_hold_devi_by_dev(dev, 0); 2336 2337 if (dip == NULL) { 2338 flags |= DDI_UNBND_DLPI2; 2339 } else if (flags & LDI_DEV_T_ANY) { 2340 flags &= ~LDI_DEV_T_ANY; 2341 dev = DDI_DEV_T_ANY; 2342 } 2343 2344 if (dip != NULL) { 2345 int64_t *prop_val; 2346 int prop_len; 2347 2348 res = i_ldi_prop_op_typed(dev, dip, flags, name, 2349 (caddr_t *)&prop_val, &prop_len, sizeof (int64_t)); 2350 2351 /* if we got it then return it */ 2352 if (res == DDI_PROP_SUCCESS) { 2353 *nelements = prop_len / sizeof (int64_t); 2354 *data = prop_val; 2355 2356 ddi_release_devi(dip); 2357 return (res); 2358 } 2359 } 2360 2361 /* call the normal property interfaces */ 2362 res = ddi_prop_lookup_int64_array(dev, dip, flags, 2363 name, data, nelements); 2364 2365 if (dip != NULL) 2366 ddi_release_devi(dip); 2367 2368 return (res); 2369 } 2370 2371 int 2372 ldi_prop_lookup_string_array(ldi_handle_t lh, 2373 uint_t flags, char *name, char ***data, uint_t *nelements) 2374 { 2375 struct ldi_handle *handlep = (struct ldi_handle *)lh; 2376 dev_info_t *dip; 2377 dev_t dev; 2378 int res; 2379 struct snode *csp; 2380 2381 if ((lh == NULL) || (name == NULL) || (strlen(name) == 0)) 2382 return (DDI_PROP_INVAL_ARG); 2383 2384 dev = handlep->lh_vp->v_rdev; 2385 2386 csp = VTOCS(handlep->lh_vp); 2387 mutex_enter(&csp->s_lock); 2388 if ((dip = csp->s_dip) != NULL) 2389 e_ddi_hold_devi(dip); 2390 mutex_exit(&csp->s_lock); 2391 if (dip == NULL) 2392 dip = e_ddi_hold_devi_by_dev(dev, 0); 2393 2394 if (dip == NULL) { 2395 flags |= DDI_UNBND_DLPI2; 2396 } else if (flags & LDI_DEV_T_ANY) { 2397 flags &= ~LDI_DEV_T_ANY; 2398 dev = DDI_DEV_T_ANY; 2399 } 2400 2401 if (dip != NULL) { 2402 char *prop_val; 2403 int prop_len; 2404 2405 res = i_ldi_prop_op_typed(dev, dip, flags, name, 2406 (caddr_t *)&prop_val, &prop_len, 0); 2407 2408 /* if we got it then return it */ 2409 if (res == DDI_PROP_SUCCESS) { 2410 char **str_array; 2411 int nelem; 2412 2413 /* 2414 * pack the returned string array into the format 2415 * our callers expect 2416 */ 2417 if (i_pack_string_array(prop_val, prop_len, 2418 &str_array, &nelem) == 0) { 2419 2420 *data = str_array; 2421 *nelements = nelem; 2422 2423 ddi_prop_free(prop_val); 2424 ddi_release_devi(dip); 2425 return (res); 2426 } 2427 2428 /* 2429 * the format of the returned property must have 2430 * been bad so throw it out 2431 */ 2432 ddi_prop_free(prop_val); 2433 } 2434 } 2435 2436 /* call the normal property interfaces */ 2437 res = ddi_prop_lookup_string_array(dev, dip, flags, 2438 name, data, nelements); 2439 2440 if (dip != NULL) 2441 ddi_release_devi(dip); 2442 2443 return (res); 2444 } 2445 2446 int 2447 ldi_prop_lookup_string(ldi_handle_t lh, 2448 uint_t flags, char *name, char **data) 2449 { 2450 struct ldi_handle *handlep = (struct ldi_handle *)lh; 2451 dev_info_t *dip; 2452 dev_t dev; 2453 int res; 2454 struct snode *csp; 2455 2456 if ((lh == NULL) || (name == NULL) || (strlen(name) == 0)) 2457 return (DDI_PROP_INVAL_ARG); 2458 2459 dev = handlep->lh_vp->v_rdev; 2460 2461 csp = VTOCS(handlep->lh_vp); 2462 mutex_enter(&csp->s_lock); 2463 if ((dip = csp->s_dip) != NULL) 2464 e_ddi_hold_devi(dip); 2465 mutex_exit(&csp->s_lock); 2466 if (dip == NULL) 2467 dip = e_ddi_hold_devi_by_dev(dev, 0); 2468 2469 if (dip == NULL) { 2470 flags |= DDI_UNBND_DLPI2; 2471 } else if (flags & LDI_DEV_T_ANY) { 2472 flags &= ~LDI_DEV_T_ANY; 2473 dev = DDI_DEV_T_ANY; 2474 } 2475 2476 if (dip != NULL) { 2477 char *prop_val; 2478 int prop_len; 2479 2480 res = i_ldi_prop_op_typed(dev, dip, flags, name, 2481 (caddr_t *)&prop_val, &prop_len, 0); 2482 2483 /* if we got it then return it */ 2484 if (res == DDI_PROP_SUCCESS) { 2485 /* 2486 * sanity check the vaule returned. 2487 */ 2488 if (i_check_string(prop_val, prop_len)) { 2489 ddi_prop_free(prop_val); 2490 } else { 2491 *data = prop_val; 2492 ddi_release_devi(dip); 2493 return (res); 2494 } 2495 } 2496 } 2497 2498 /* call the normal property interfaces */ 2499 res = ddi_prop_lookup_string(dev, dip, flags, name, data); 2500 2501 if (dip != NULL) 2502 ddi_release_devi(dip); 2503 2504 #ifdef DEBUG 2505 if (res == DDI_PROP_SUCCESS) { 2506 /* 2507 * keep ourselves honest 2508 * make sure the framework returns strings in the 2509 * same format as we're demanding from drivers. 2510 */ 2511 struct prop_driver_data *pdd; 2512 int pdd_prop_size; 2513 2514 pdd = ((struct prop_driver_data *)(*data)) - 1; 2515 pdd_prop_size = pdd->pdd_size - 2516 sizeof (struct prop_driver_data); 2517 ASSERT(i_check_string(*data, pdd_prop_size) == 0); 2518 } 2519 #endif /* DEBUG */ 2520 2521 return (res); 2522 } 2523 2524 int 2525 ldi_prop_lookup_byte_array(ldi_handle_t lh, 2526 uint_t flags, char *name, uchar_t **data, uint_t *nelements) 2527 { 2528 struct ldi_handle *handlep = (struct ldi_handle *)lh; 2529 dev_info_t *dip; 2530 dev_t dev; 2531 int res; 2532 struct snode *csp; 2533 2534 if ((lh == NULL) || (name == NULL) || (strlen(name) == 0)) 2535 return (DDI_PROP_INVAL_ARG); 2536 2537 dev = handlep->lh_vp->v_rdev; 2538 2539 csp = VTOCS(handlep->lh_vp); 2540 mutex_enter(&csp->s_lock); 2541 if ((dip = csp->s_dip) != NULL) 2542 e_ddi_hold_devi(dip); 2543 mutex_exit(&csp->s_lock); 2544 if (dip == NULL) 2545 dip = e_ddi_hold_devi_by_dev(dev, 0); 2546 2547 if (dip == NULL) { 2548 flags |= DDI_UNBND_DLPI2; 2549 } else if (flags & LDI_DEV_T_ANY) { 2550 flags &= ~LDI_DEV_T_ANY; 2551 dev = DDI_DEV_T_ANY; 2552 } 2553 2554 if (dip != NULL) { 2555 uchar_t *prop_val; 2556 int prop_len; 2557 2558 res = i_ldi_prop_op_typed(dev, dip, flags, name, 2559 (caddr_t *)&prop_val, &prop_len, sizeof (uchar_t)); 2560 2561 /* if we got it then return it */ 2562 if (res == DDI_PROP_SUCCESS) { 2563 *nelements = prop_len / sizeof (uchar_t); 2564 *data = prop_val; 2565 2566 ddi_release_devi(dip); 2567 return (res); 2568 } 2569 } 2570 2571 /* call the normal property interfaces */ 2572 res = ddi_prop_lookup_byte_array(dev, dip, flags, 2573 name, data, nelements); 2574 2575 if (dip != NULL) 2576 ddi_release_devi(dip); 2577 2578 return (res); 2579 } 2580 2581 int 2582 ldi_prop_get_int(ldi_handle_t lh, 2583 uint_t flags, char *name, int defvalue) 2584 { 2585 struct ldi_handle *handlep = (struct ldi_handle *)lh; 2586 dev_info_t *dip; 2587 dev_t dev; 2588 int res; 2589 struct snode *csp; 2590 2591 if ((lh == NULL) || (name == NULL) || (strlen(name) == 0)) 2592 return (defvalue); 2593 2594 dev = handlep->lh_vp->v_rdev; 2595 2596 csp = VTOCS(handlep->lh_vp); 2597 mutex_enter(&csp->s_lock); 2598 if ((dip = csp->s_dip) != NULL) 2599 e_ddi_hold_devi(dip); 2600 mutex_exit(&csp->s_lock); 2601 if (dip == NULL) 2602 dip = e_ddi_hold_devi_by_dev(dev, 0); 2603 2604 if (dip == NULL) { 2605 flags |= DDI_UNBND_DLPI2; 2606 } else if (flags & LDI_DEV_T_ANY) { 2607 flags &= ~LDI_DEV_T_ANY; 2608 dev = DDI_DEV_T_ANY; 2609 } 2610 2611 if (dip != NULL) { 2612 int prop_val; 2613 int prop_len; 2614 2615 /* 2616 * first call the drivers prop_op interface to allow it 2617 * it to override default property values. 2618 */ 2619 prop_len = sizeof (int); 2620 res = i_ldi_prop_op(dev, dip, PROP_LEN_AND_VAL_BUF, 2621 flags | DDI_PROP_DYNAMIC, name, 2622 (caddr_t)&prop_val, &prop_len); 2623 2624 /* if we got it then return it */ 2625 if ((res == DDI_PROP_SUCCESS) && 2626 (prop_len == sizeof (int))) { 2627 res = prop_val; 2628 ddi_release_devi(dip); 2629 return (res); 2630 } 2631 } 2632 2633 /* call the normal property interfaces */ 2634 res = ddi_prop_get_int(dev, dip, flags, name, defvalue); 2635 2636 if (dip != NULL) 2637 ddi_release_devi(dip); 2638 2639 return (res); 2640 } 2641 2642 int64_t 2643 ldi_prop_get_int64(ldi_handle_t lh, 2644 uint_t flags, char *name, int64_t defvalue) 2645 { 2646 struct ldi_handle *handlep = (struct ldi_handle *)lh; 2647 dev_info_t *dip; 2648 dev_t dev; 2649 int64_t res; 2650 struct snode *csp; 2651 2652 if ((lh == NULL) || (name == NULL) || (strlen(name) == 0)) 2653 return (defvalue); 2654 2655 dev = handlep->lh_vp->v_rdev; 2656 2657 csp = VTOCS(handlep->lh_vp); 2658 mutex_enter(&csp->s_lock); 2659 if ((dip = csp->s_dip) != NULL) 2660 e_ddi_hold_devi(dip); 2661 mutex_exit(&csp->s_lock); 2662 if (dip == NULL) 2663 dip = e_ddi_hold_devi_by_dev(dev, 0); 2664 2665 if (dip == NULL) { 2666 flags |= DDI_UNBND_DLPI2; 2667 } else if (flags & LDI_DEV_T_ANY) { 2668 flags &= ~LDI_DEV_T_ANY; 2669 dev = DDI_DEV_T_ANY; 2670 } 2671 2672 if (dip != NULL) { 2673 int64_t prop_val; 2674 int prop_len; 2675 2676 /* 2677 * first call the drivers prop_op interface to allow it 2678 * it to override default property values. 2679 */ 2680 prop_len = sizeof (int64_t); 2681 res = i_ldi_prop_op(dev, dip, PROP_LEN_AND_VAL_BUF, 2682 flags | DDI_PROP_DYNAMIC, name, 2683 (caddr_t)&prop_val, &prop_len); 2684 2685 /* if we got it then return it */ 2686 if ((res == DDI_PROP_SUCCESS) && 2687 (prop_len == sizeof (int64_t))) { 2688 res = prop_val; 2689 ddi_release_devi(dip); 2690 return (res); 2691 } 2692 } 2693 2694 /* call the normal property interfaces */ 2695 res = ddi_prop_get_int64(dev, dip, flags, name, defvalue); 2696 2697 if (dip != NULL) 2698 ddi_release_devi(dip); 2699 2700 return (res); 2701 } 2702 2703 int 2704 ldi_prop_exists(ldi_handle_t lh, uint_t flags, char *name) 2705 { 2706 struct ldi_handle *handlep = (struct ldi_handle *)lh; 2707 dev_info_t *dip; 2708 dev_t dev; 2709 int res, prop_len; 2710 struct snode *csp; 2711 2712 if ((lh == NULL) || (name == NULL) || (strlen(name) == 0)) 2713 return (0); 2714 2715 dev = handlep->lh_vp->v_rdev; 2716 2717 csp = VTOCS(handlep->lh_vp); 2718 mutex_enter(&csp->s_lock); 2719 if ((dip = csp->s_dip) != NULL) 2720 e_ddi_hold_devi(dip); 2721 mutex_exit(&csp->s_lock); 2722 if (dip == NULL) 2723 dip = e_ddi_hold_devi_by_dev(dev, 0); 2724 2725 /* if NULL dip, prop does NOT exist */ 2726 if (dip == NULL) 2727 return (0); 2728 2729 if (flags & LDI_DEV_T_ANY) { 2730 flags &= ~LDI_DEV_T_ANY; 2731 dev = DDI_DEV_T_ANY; 2732 } 2733 2734 /* 2735 * first call the drivers prop_op interface to allow it 2736 * it to override default property values. 2737 */ 2738 res = i_ldi_prop_op(dev, dip, PROP_LEN, 2739 flags | DDI_PROP_DYNAMIC, name, NULL, &prop_len); 2740 2741 if (res == DDI_PROP_SUCCESS) { 2742 ddi_release_devi(dip); 2743 return (1); 2744 } 2745 2746 /* call the normal property interfaces */ 2747 res = ddi_prop_exists(dev, dip, flags, name); 2748 2749 ddi_release_devi(dip); 2750 return (res); 2751 } 2752 2753 #ifdef LDI_OBSOLETE_EVENT 2754 2755 int 2756 ldi_get_eventcookie(ldi_handle_t lh, char *name, ddi_eventcookie_t *ecp) 2757 { 2758 struct ldi_handle *handlep = (struct ldi_handle *)lh; 2759 dev_info_t *dip; 2760 dev_t dev; 2761 int res; 2762 struct snode *csp; 2763 2764 if ((lh == NULL) || (name == NULL) || 2765 (strlen(name) == 0) || (ecp == NULL)) { 2766 return (DDI_FAILURE); 2767 } 2768 2769 ASSERT(!servicing_interrupt()); 2770 2771 dev = handlep->lh_vp->v_rdev; 2772 2773 csp = VTOCS(handlep->lh_vp); 2774 mutex_enter(&csp->s_lock); 2775 if ((dip = csp->s_dip) != NULL) 2776 e_ddi_hold_devi(dip); 2777 mutex_exit(&csp->s_lock); 2778 if (dip == NULL) 2779 dip = e_ddi_hold_devi_by_dev(dev, 0); 2780 2781 if (dip == NULL) 2782 return (DDI_FAILURE); 2783 2784 LDI_EVENTCB((CE_NOTE, "%s: event_name=%s, " 2785 "dip=0x%p, event_cookiep=0x%p", "ldi_get_eventcookie", 2786 name, (void *)dip, (void *)ecp)); 2787 2788 res = ddi_get_eventcookie(dip, name, ecp); 2789 2790 ddi_release_devi(dip); 2791 return (res); 2792 } 2793 2794 int 2795 ldi_add_event_handler(ldi_handle_t lh, ddi_eventcookie_t ec, 2796 void (*handler)(ldi_handle_t, ddi_eventcookie_t, void *, void *), 2797 void *arg, ldi_callback_id_t *id) 2798 { 2799 struct ldi_handle *handlep = (struct ldi_handle *)lh; 2800 struct ldi_event *lep; 2801 dev_info_t *dip; 2802 dev_t dev; 2803 int res; 2804 struct snode *csp; 2805 2806 if ((lh == NULL) || (ec == NULL) || (handler == NULL) || (id == NULL)) 2807 return (DDI_FAILURE); 2808 2809 ASSERT(!servicing_interrupt()); 2810 2811 dev = handlep->lh_vp->v_rdev; 2812 2813 csp = VTOCS(handlep->lh_vp); 2814 mutex_enter(&csp->s_lock); 2815 if ((dip = csp->s_dip) != NULL) 2816 e_ddi_hold_devi(dip); 2817 mutex_exit(&csp->s_lock); 2818 if (dip == NULL) 2819 dip = e_ddi_hold_devi_by_dev(dev, 0); 2820 2821 if (dip == NULL) 2822 return (DDI_FAILURE); 2823 2824 lep = kmem_zalloc(sizeof (struct ldi_event), KM_SLEEP); 2825 lep->le_lhp = handlep; 2826 lep->le_arg = arg; 2827 lep->le_handler = handler; 2828 2829 if ((res = ddi_add_event_handler(dip, ec, i_ldi_callback, 2830 (void *)lep, &lep->le_id)) != DDI_SUCCESS) { 2831 LDI_EVENTCB((CE_WARN, "%s: unable to add" 2832 "event callback", "ldi_add_event_handler")); 2833 ddi_release_devi(dip); 2834 kmem_free(lep, sizeof (struct ldi_event)); 2835 return (res); 2836 } 2837 2838 *id = (ldi_callback_id_t)lep; 2839 2840 LDI_EVENTCB((CE_NOTE, "%s: dip=0x%p, event=0x%p, " 2841 "ldi_eventp=0x%p, cb_id=0x%p", "ldi_add_event_handler", 2842 (void *)dip, (void *)ec, (void *)lep, (void *)id)); 2843 2844 handle_event_add(lep); 2845 ddi_release_devi(dip); 2846 return (res); 2847 } 2848 2849 int 2850 ldi_remove_event_handler(ldi_handle_t lh, ldi_callback_id_t id) 2851 { 2852 ldi_event_t *lep = (ldi_event_t *)id; 2853 int res; 2854 2855 if ((lh == NULL) || (id == NULL)) 2856 return (DDI_FAILURE); 2857 2858 ASSERT(!servicing_interrupt()); 2859 2860 if ((res = ddi_remove_event_handler(lep->le_id)) 2861 != DDI_SUCCESS) { 2862 LDI_EVENTCB((CE_WARN, "%s: unable to remove " 2863 "event callback", "ldi_remove_event_handler")); 2864 return (res); 2865 } 2866 2867 handle_event_remove(lep); 2868 kmem_free(lep, sizeof (struct ldi_event)); 2869 return (res); 2870 } 2871 2872 #endif 2873 2874 /* 2875 * Here are some definitions of terms used in the following LDI events 2876 * code: 2877 * 2878 * "LDI events" AKA "native events": These are events defined by the 2879 * "new" LDI event framework. These events are serviced by the LDI event 2880 * framework itself and thus are native to it. 2881 * 2882 * "LDI contract events": These are contract events that correspond to the 2883 * LDI events. This mapping of LDI events to contract events is defined by 2884 * the ldi_ev_cookies[] array above. 2885 * 2886 * NDI events: These are events which are serviced by the NDI event subsystem. 2887 * LDI subsystem just provides a thin wrapper around the NDI event interfaces 2888 * These events are therefore *not* native events. 2889 */ 2890 2891 static int 2892 ldi_native_event(const char *evname) 2893 { 2894 int i; 2895 2896 LDI_EVTRC((CE_NOTE, "ldi_native_event: entered: ev=%s", evname)); 2897 2898 for (i = 0; ldi_ev_cookies[i].ck_evname != NULL; i++) { 2899 if (strcmp(ldi_ev_cookies[i].ck_evname, evname) == 0) 2900 return (1); 2901 } 2902 2903 return (0); 2904 } 2905 2906 static uint_t 2907 ldi_ev_sync_event(const char *evname) 2908 { 2909 int i; 2910 2911 ASSERT(ldi_native_event(evname)); 2912 2913 LDI_EVTRC((CE_NOTE, "ldi_ev_sync_event: entered: %s", evname)); 2914 2915 for (i = 0; ldi_ev_cookies[i].ck_evname != NULL; i++) { 2916 if (strcmp(ldi_ev_cookies[i].ck_evname, evname) == 0) 2917 return (ldi_ev_cookies[i].ck_sync); 2918 } 2919 2920 /* 2921 * This should never happen until non-contract based 2922 * LDI events are introduced. If that happens, we will 2923 * use a "special" token to indicate that there are no 2924 * contracts corresponding to this LDI event. 2925 */ 2926 cmn_err(CE_PANIC, "Unknown LDI event: %s", evname); 2927 2928 return (0); 2929 } 2930 2931 static uint_t 2932 ldi_contract_event(const char *evname) 2933 { 2934 int i; 2935 2936 ASSERT(ldi_native_event(evname)); 2937 2938 LDI_EVTRC((CE_NOTE, "ldi_contract_event: entered: %s", evname)); 2939 2940 for (i = 0; ldi_ev_cookies[i].ck_evname != NULL; i++) { 2941 if (strcmp(ldi_ev_cookies[i].ck_evname, evname) == 0) 2942 return (ldi_ev_cookies[i].ck_ctype); 2943 } 2944 2945 /* 2946 * This should never happen until non-contract based 2947 * LDI events are introduced. If that happens, we will 2948 * use a "special" token to indicate that there are no 2949 * contracts corresponding to this LDI event. 2950 */ 2951 cmn_err(CE_PANIC, "Unknown LDI event: %s", evname); 2952 2953 return (0); 2954 } 2955 2956 char * 2957 ldi_ev_get_type(ldi_ev_cookie_t cookie) 2958 { 2959 int i; 2960 struct ldi_ev_cookie *cookie_impl = (struct ldi_ev_cookie *)cookie; 2961 2962 for (i = 0; ldi_ev_cookies[i].ck_evname != NULL; i++) { 2963 if (&ldi_ev_cookies[i] == cookie_impl) { 2964 LDI_EVTRC((CE_NOTE, "ldi_ev_get_type: LDI: %s", 2965 ldi_ev_cookies[i].ck_evname)); 2966 return (ldi_ev_cookies[i].ck_evname); 2967 } 2968 } 2969 2970 /* 2971 * Not an LDI native event. Must be NDI event service. 2972 * Just return a generic string 2973 */ 2974 LDI_EVTRC((CE_NOTE, "ldi_ev_get_type: is NDI")); 2975 return (NDI_EVENT_SERVICE); 2976 } 2977 2978 static int 2979 ldi_native_cookie(ldi_ev_cookie_t cookie) 2980 { 2981 int i; 2982 struct ldi_ev_cookie *cookie_impl = (struct ldi_ev_cookie *)cookie; 2983 2984 for (i = 0; ldi_ev_cookies[i].ck_evname != NULL; i++) { 2985 if (&ldi_ev_cookies[i] == cookie_impl) { 2986 LDI_EVTRC((CE_NOTE, "ldi_native_cookie: native LDI")); 2987 return (1); 2988 } 2989 } 2990 2991 LDI_EVTRC((CE_NOTE, "ldi_native_cookie: is NDI")); 2992 return (0); 2993 } 2994 2995 static ldi_ev_cookie_t 2996 ldi_get_native_cookie(const char *evname) 2997 { 2998 int i; 2999 3000 for (i = 0; ldi_ev_cookies[i].ck_evname != NULL; i++) { 3001 if (strcmp(ldi_ev_cookies[i].ck_evname, evname) == 0) { 3002 LDI_EVTRC((CE_NOTE, "ldi_get_native_cookie: found")); 3003 return ((ldi_ev_cookie_t)&ldi_ev_cookies[i]); 3004 } 3005 } 3006 3007 LDI_EVTRC((CE_NOTE, "ldi_get_native_cookie: NOT found")); 3008 return (NULL); 3009 } 3010 3011 /* 3012 * ldi_ev_lock() needs to be recursive, since layered drivers may call 3013 * other LDI interfaces (such as ldi_close() from within the context of 3014 * a notify callback. Since the notify callback is called with the 3015 * ldi_ev_lock() held and ldi_close() also grabs ldi_ev_lock, the lock needs 3016 * to be recursive. 3017 */ 3018 static void 3019 ldi_ev_lock(void) 3020 { 3021 LDI_EVTRC((CE_NOTE, "ldi_ev_lock: entered")); 3022 3023 mutex_enter(&ldi_ev_callback_list.le_lock); 3024 if (ldi_ev_callback_list.le_thread == curthread) { 3025 ASSERT(ldi_ev_callback_list.le_busy >= 1); 3026 ldi_ev_callback_list.le_busy++; 3027 } else { 3028 while (ldi_ev_callback_list.le_busy) 3029 cv_wait(&ldi_ev_callback_list.le_cv, 3030 &ldi_ev_callback_list.le_lock); 3031 ASSERT(ldi_ev_callback_list.le_thread == NULL); 3032 ldi_ev_callback_list.le_busy = 1; 3033 ldi_ev_callback_list.le_thread = curthread; 3034 } 3035 mutex_exit(&ldi_ev_callback_list.le_lock); 3036 3037 LDI_EVTRC((CE_NOTE, "ldi_ev_lock: exit")); 3038 } 3039 3040 static void 3041 ldi_ev_unlock(void) 3042 { 3043 LDI_EVTRC((CE_NOTE, "ldi_ev_unlock: entered")); 3044 mutex_enter(&ldi_ev_callback_list.le_lock); 3045 ASSERT(ldi_ev_callback_list.le_thread == curthread); 3046 ASSERT(ldi_ev_callback_list.le_busy >= 1); 3047 3048 ldi_ev_callback_list.le_busy--; 3049 if (ldi_ev_callback_list.le_busy == 0) { 3050 ldi_ev_callback_list.le_thread = NULL; 3051 cv_signal(&ldi_ev_callback_list.le_cv); 3052 } 3053 mutex_exit(&ldi_ev_callback_list.le_lock); 3054 LDI_EVTRC((CE_NOTE, "ldi_ev_unlock: exit")); 3055 } 3056 3057 int 3058 ldi_ev_get_cookie(ldi_handle_t lh, char *evname, ldi_ev_cookie_t *cookiep) 3059 { 3060 struct ldi_handle *handlep = (struct ldi_handle *)lh; 3061 dev_info_t *dip; 3062 dev_t dev; 3063 int res; 3064 struct snode *csp; 3065 ddi_eventcookie_t ddi_cookie; 3066 ldi_ev_cookie_t tcookie; 3067 3068 LDI_EVDBG((CE_NOTE, "ldi_ev_get_cookie: entered: evname=%s", 3069 evname ? evname : "<NULL>")); 3070 3071 if (lh == NULL || evname == NULL || 3072 strlen(evname) == 0 || cookiep == NULL) { 3073 LDI_EVDBG((CE_NOTE, "ldi_ev_get_cookie: invalid args")); 3074 return (LDI_EV_FAILURE); 3075 } 3076 3077 *cookiep = NULL; 3078 3079 /* 3080 * First check if it is a LDI native event 3081 */ 3082 tcookie = ldi_get_native_cookie(evname); 3083 if (tcookie) { 3084 LDI_EVDBG((CE_NOTE, "ldi_ev_get_cookie: got native cookie")); 3085 *cookiep = tcookie; 3086 return (LDI_EV_SUCCESS); 3087 } 3088 3089 /* 3090 * Not a LDI native event. Try NDI event services 3091 */ 3092 3093 dev = handlep->lh_vp->v_rdev; 3094 3095 csp = VTOCS(handlep->lh_vp); 3096 mutex_enter(&csp->s_lock); 3097 if ((dip = csp->s_dip) != NULL) 3098 e_ddi_hold_devi(dip); 3099 mutex_exit(&csp->s_lock); 3100 if (dip == NULL) 3101 dip = e_ddi_hold_devi_by_dev(dev, 0); 3102 3103 if (dip == NULL) { 3104 cmn_err(CE_WARN, "ldi_ev_get_cookie: No devinfo node for LDI " 3105 "handle: %p", (void *)handlep); 3106 return (LDI_EV_FAILURE); 3107 } 3108 3109 LDI_EVDBG((CE_NOTE, "Calling ddi_get_eventcookie: dip=%p, ev=%s", 3110 (void *)dip, evname)); 3111 3112 res = ddi_get_eventcookie(dip, evname, &ddi_cookie); 3113 3114 ddi_release_devi(dip); 3115 3116 if (res == DDI_SUCCESS) { 3117 LDI_EVDBG((CE_NOTE, "ldi_ev_get_cookie: NDI cookie found")); 3118 *cookiep = (ldi_ev_cookie_t)ddi_cookie; 3119 return (LDI_EV_SUCCESS); 3120 } else { 3121 LDI_EVDBG((CE_WARN, "ldi_ev_get_cookie: NDI cookie: failed")); 3122 return (LDI_EV_FAILURE); 3123 } 3124 } 3125 3126 /*ARGSUSED*/ 3127 static void 3128 i_ldi_ev_callback(dev_info_t *dip, ddi_eventcookie_t event_cookie, 3129 void *arg, void *ev_data) 3130 { 3131 ldi_ev_callback_impl_t *lecp = (ldi_ev_callback_impl_t *)arg; 3132 3133 ASSERT(lecp != NULL); 3134 ASSERT(!ldi_native_cookie(lecp->lec_cookie)); 3135 ASSERT(lecp->lec_lhp); 3136 ASSERT(lecp->lec_notify == NULL); 3137 ASSERT(lecp->lec_finalize); 3138 3139 LDI_EVDBG((CE_NOTE, "i_ldi_ev_callback: ldh=%p, cookie=%p, arg=%p, " 3140 "ev_data=%p", (void *)lecp->lec_lhp, (void *)event_cookie, 3141 (void *)lecp->lec_arg, (void *)ev_data)); 3142 3143 lecp->lec_finalize(lecp->lec_lhp, (ldi_ev_cookie_t)event_cookie, 3144 lecp->lec_arg, ev_data); 3145 } 3146 3147 int 3148 ldi_ev_register_callbacks(ldi_handle_t lh, ldi_ev_cookie_t cookie, 3149 ldi_ev_callback_t *callb, void *arg, ldi_callback_id_t *id) 3150 { 3151 struct ldi_handle *lhp = (struct ldi_handle *)lh; 3152 ldi_ev_callback_impl_t *lecp; 3153 dev_t dev; 3154 struct snode *csp; 3155 dev_info_t *dip; 3156 int ddi_event; 3157 3158 ASSERT(!servicing_interrupt()); 3159 3160 if (lh == NULL || cookie == NULL || callb == NULL || id == NULL) { 3161 LDI_EVDBG((CE_NOTE, "ldi_ev_register_callbacks: Invalid args")); 3162 return (LDI_EV_FAILURE); 3163 } 3164 3165 if (callb->cb_vers != LDI_EV_CB_VERS) { 3166 LDI_EVDBG((CE_NOTE, "ldi_ev_register_callbacks: Invalid vers")); 3167 return (LDI_EV_FAILURE); 3168 } 3169 3170 if (callb->cb_notify == NULL && callb->cb_finalize == NULL) { 3171 LDI_EVDBG((CE_NOTE, "ldi_ev_register_callbacks: NULL callb")); 3172 return (LDI_EV_FAILURE); 3173 } 3174 3175 *id = 0; 3176 3177 dev = lhp->lh_vp->v_rdev; 3178 csp = VTOCS(lhp->lh_vp); 3179 mutex_enter(&csp->s_lock); 3180 if ((dip = csp->s_dip) != NULL) 3181 e_ddi_hold_devi(dip); 3182 mutex_exit(&csp->s_lock); 3183 if (dip == NULL) 3184 dip = e_ddi_hold_devi_by_dev(dev, 0); 3185 3186 if (dip == NULL) { 3187 cmn_err(CE_WARN, "ldi_ev_register: No devinfo node for " 3188 "LDI handle: %p", (void *)lhp); 3189 return (LDI_EV_FAILURE); 3190 } 3191 3192 lecp = kmem_zalloc(sizeof (ldi_ev_callback_impl_t), KM_SLEEP); 3193 3194 ddi_event = 0; 3195 if (!ldi_native_cookie(cookie)) { 3196 if (callb->cb_notify || callb->cb_finalize == NULL) { 3197 /* 3198 * NDI event services only accept finalize 3199 */ 3200 cmn_err(CE_WARN, "%s: module: %s: NDI event cookie. " 3201 "Only finalize" 3202 " callback supported with this cookie", 3203 "ldi_ev_register_callbacks", 3204 lhp->lh_ident->li_modname); 3205 kmem_free(lecp, sizeof (ldi_ev_callback_impl_t)); 3206 ddi_release_devi(dip); 3207 return (LDI_EV_FAILURE); 3208 } 3209 3210 if (ddi_add_event_handler(dip, (ddi_eventcookie_t)cookie, 3211 i_ldi_ev_callback, (void *)lecp, 3212 (ddi_callback_id_t *)&lecp->lec_id) 3213 != DDI_SUCCESS) { 3214 kmem_free(lecp, sizeof (ldi_ev_callback_impl_t)); 3215 ddi_release_devi(dip); 3216 LDI_EVDBG((CE_NOTE, "ldi_ev_register_callbacks(): " 3217 "ddi_add_event_handler failed")); 3218 return (LDI_EV_FAILURE); 3219 } 3220 ddi_event = 1; 3221 LDI_EVDBG((CE_NOTE, "ldi_ev_register_callbacks(): " 3222 "ddi_add_event_handler success")); 3223 } 3224 3225 3226 3227 ldi_ev_lock(); 3228 3229 /* 3230 * Add the notify/finalize callback to the LDI's list of callbacks. 3231 */ 3232 lecp->lec_lhp = lhp; 3233 lecp->lec_dev = lhp->lh_vp->v_rdev; 3234 lecp->lec_spec = VTYP_TO_STYP(lhp->lh_vp->v_type); 3235 lecp->lec_notify = callb->cb_notify; 3236 lecp->lec_finalize = callb->cb_finalize; 3237 lecp->lec_arg = arg; 3238 lecp->lec_cookie = cookie; 3239 if (!ddi_event) 3240 lecp->lec_id = (void *)(uintptr_t)(++ldi_ev_id_pool); 3241 else 3242 ASSERT(lecp->lec_id); 3243 lecp->lec_dip = dip; 3244 list_insert_tail(&ldi_ev_callback_list.le_head, lecp); 3245 3246 *id = (ldi_callback_id_t)lecp->lec_id; 3247 3248 ldi_ev_unlock(); 3249 3250 ddi_release_devi(dip); 3251 3252 LDI_EVDBG((CE_NOTE, "ldi_ev_register_callbacks: registered " 3253 "notify/finalize")); 3254 3255 return (LDI_EV_SUCCESS); 3256 } 3257 3258 static int 3259 ldi_ev_device_match(ldi_ev_callback_impl_t *lecp, dev_info_t *dip, 3260 dev_t dev, int spec_type) 3261 { 3262 ASSERT(lecp); 3263 ASSERT(dip); 3264 ASSERT(dev != DDI_DEV_T_NONE); 3265 ASSERT(dev != NODEV); 3266 ASSERT((dev == DDI_DEV_T_ANY && spec_type == 0) || 3267 (spec_type == S_IFCHR || spec_type == S_IFBLK)); 3268 ASSERT(lecp->lec_dip); 3269 ASSERT(lecp->lec_spec == S_IFCHR || lecp->lec_spec == S_IFBLK); 3270 ASSERT(lecp->lec_dev != DDI_DEV_T_ANY); 3271 ASSERT(lecp->lec_dev != DDI_DEV_T_NONE); 3272 ASSERT(lecp->lec_dev != NODEV); 3273 3274 if (dip != lecp->lec_dip) 3275 return (0); 3276 3277 if (dev != DDI_DEV_T_ANY) { 3278 if (dev != lecp->lec_dev || spec_type != lecp->lec_spec) 3279 return (0); 3280 } 3281 3282 LDI_EVTRC((CE_NOTE, "ldi_ev_device_match: MATCH dip=%p", (void *)dip)); 3283 3284 return (1); 3285 } 3286 3287 /* 3288 * LDI framework function to post a "notify" event to all layered drivers 3289 * that have registered for that event 3290 * 3291 * Returns: 3292 * LDI_EV_SUCCESS - registered callbacks allow event 3293 * LDI_EV_FAILURE - registered callbacks block event 3294 * LDI_EV_NONE - No matching LDI callbacks 3295 * 3296 * This function is *not* to be called by layered drivers. It is for I/O 3297 * framework code in Solaris, such as the I/O retire code and DR code 3298 * to call while servicing a device event such as offline or degraded. 3299 */ 3300 int 3301 ldi_invoke_notify(dev_info_t *dip, dev_t dev, int spec_type, char *event, 3302 void *ev_data) 3303 { 3304 ldi_ev_callback_impl_t *lecp; 3305 list_t *listp; 3306 int ret; 3307 char *lec_event; 3308 3309 ASSERT(dip); 3310 ASSERT(dev != DDI_DEV_T_NONE); 3311 ASSERT(dev != NODEV); 3312 ASSERT((dev == DDI_DEV_T_ANY && spec_type == 0) || 3313 (spec_type == S_IFCHR || spec_type == S_IFBLK)); 3314 ASSERT(event); 3315 ASSERT(ldi_native_event(event)); 3316 ASSERT(ldi_ev_sync_event(event)); 3317 3318 LDI_EVDBG((CE_NOTE, "ldi_invoke_notify(): entered: dip=%p, ev=%s", 3319 (void *)dip, event)); 3320 3321 ret = LDI_EV_NONE; 3322 ldi_ev_lock(); 3323 listp = &ldi_ev_callback_list.le_head; 3324 for (lecp = list_head(listp); lecp; lecp = list_next(listp, lecp)) { 3325 3326 /* Check if matching device */ 3327 if (!ldi_ev_device_match(lecp, dip, dev, spec_type)) 3328 continue; 3329 3330 if (lecp->lec_lhp == NULL) { 3331 /* 3332 * Consumer has unregistered the handle and so 3333 * is no longer interested in notify events. 3334 */ 3335 LDI_EVDBG((CE_NOTE, "ldi_invoke_notify(): No LDI " 3336 "handle, skipping")); 3337 continue; 3338 } 3339 3340 if (lecp->lec_notify == NULL) { 3341 LDI_EVDBG((CE_NOTE, "ldi_invoke_notify(): No notify " 3342 "callback. skipping")); 3343 continue; /* not interested in notify */ 3344 } 3345 3346 /* 3347 * Check if matching event 3348 */ 3349 lec_event = ldi_ev_get_type(lecp->lec_cookie); 3350 if (strcmp(event, lec_event) != 0) { 3351 LDI_EVDBG((CE_NOTE, "ldi_invoke_notify(): Not matching" 3352 " event {%s,%s}. skipping", event, lec_event)); 3353 continue; 3354 } 3355 3356 lecp->lec_lhp->lh_flags |= LH_FLAGS_NOTIFY; 3357 if (lecp->lec_notify(lecp->lec_lhp, lecp->lec_cookie, 3358 lecp->lec_arg, ev_data) != LDI_EV_SUCCESS) { 3359 ret = LDI_EV_FAILURE; 3360 LDI_EVDBG((CE_NOTE, "ldi_invoke_notify(): notify" 3361 " FAILURE")); 3362 break; 3363 } 3364 3365 /* We have a matching callback that allows the event to occur */ 3366 ret = LDI_EV_SUCCESS; 3367 3368 LDI_EVDBG((CE_NOTE, "ldi_invoke_notify(): 1 consumer success")); 3369 } 3370 3371 if (ret != LDI_EV_FAILURE) 3372 goto out; 3373 3374 LDI_EVDBG((CE_NOTE, "ldi_invoke_notify(): undoing notify")); 3375 3376 /* 3377 * Undo notifies already sent 3378 */ 3379 lecp = list_prev(listp, lecp); 3380 for (; lecp; lecp = list_prev(listp, lecp)) { 3381 3382 /* 3383 * Check if matching device 3384 */ 3385 if (!ldi_ev_device_match(lecp, dip, dev, spec_type)) 3386 continue; 3387 3388 3389 if (lecp->lec_finalize == NULL) { 3390 LDI_EVDBG((CE_NOTE, "ldi_invoke_notify(): no finalize, " 3391 "skipping")); 3392 continue; /* not interested in finalize */ 3393 } 3394 3395 /* 3396 * it is possible that in response to a notify event a 3397 * layered driver closed its LDI handle so it is ok 3398 * to have a NULL LDI handle for finalize. The layered 3399 * driver is expected to maintain state in its "arg" 3400 * parameter to keep track of the closed device. 3401 */ 3402 3403 /* Check if matching event */ 3404 lec_event = ldi_ev_get_type(lecp->lec_cookie); 3405 if (strcmp(event, lec_event) != 0) { 3406 LDI_EVDBG((CE_NOTE, "ldi_invoke_notify(): not matching " 3407 "event: %s,%s, skipping", event, lec_event)); 3408 continue; 3409 } 3410 3411 LDI_EVDBG((CE_NOTE, "ldi_invoke_notify(): calling finalize")); 3412 3413 lecp->lec_finalize(lecp->lec_lhp, lecp->lec_cookie, 3414 LDI_EV_FAILURE, lecp->lec_arg, ev_data); 3415 3416 /* 3417 * If LDI native event and LDI handle closed in context 3418 * of notify, NULL out the finalize callback as we have 3419 * already called the 1 finalize above allowed in this situation 3420 */ 3421 if (lecp->lec_lhp == NULL && 3422 ldi_native_cookie(lecp->lec_cookie)) { 3423 LDI_EVDBG((CE_NOTE, 3424 "ldi_invoke_notify(): NULL-ing finalize after " 3425 "calling 1 finalize following ldi_close")); 3426 lecp->lec_finalize = NULL; 3427 } 3428 } 3429 3430 out: 3431 ldi_ev_unlock(); 3432 3433 if (ret == LDI_EV_NONE) { 3434 LDI_EVDBG((CE_NOTE, "ldi_invoke_notify(): no matching " 3435 "LDI callbacks")); 3436 } 3437 3438 return (ret); 3439 } 3440 3441 /* 3442 * Framework function to be called from a layered driver to propagate 3443 * LDI "notify" events to exported minors. 3444 * 3445 * This function is a public interface exported by the LDI framework 3446 * for use by layered drivers to propagate device events up the software 3447 * stack. 3448 */ 3449 int 3450 ldi_ev_notify(dev_info_t *dip, minor_t minor, int spec_type, 3451 ldi_ev_cookie_t cookie, void *ev_data) 3452 { 3453 char *evname = ldi_ev_get_type(cookie); 3454 uint_t ct_evtype; 3455 dev_t dev; 3456 major_t major; 3457 int retc; 3458 int retl; 3459 3460 ASSERT(spec_type == S_IFBLK || spec_type == S_IFCHR); 3461 ASSERT(dip); 3462 ASSERT(ldi_native_cookie(cookie)); 3463 3464 LDI_EVDBG((CE_NOTE, "ldi_ev_notify(): entered: event=%s, dip=%p", 3465 evname, (void *)dip)); 3466 3467 if (!ldi_ev_sync_event(evname)) { 3468 cmn_err(CE_PANIC, "ldi_ev_notify(): %s not a " 3469 "negotiatable event", evname); 3470 return (LDI_EV_SUCCESS); 3471 } 3472 3473 major = ddi_driver_major(dip); 3474 if (major == DDI_MAJOR_T_NONE) { 3475 char *path = kmem_alloc(MAXPATHLEN, KM_SLEEP); 3476 (void) ddi_pathname(dip, path); 3477 cmn_err(CE_WARN, "ldi_ev_notify: cannot derive major number " 3478 "for device %s", path); 3479 kmem_free(path, MAXPATHLEN); 3480 return (LDI_EV_FAILURE); 3481 } 3482 dev = makedevice(major, minor); 3483 3484 /* 3485 * Generate negotiation contract events on contracts (if any) associated 3486 * with this minor. 3487 */ 3488 LDI_EVDBG((CE_NOTE, "ldi_ev_notify(): calling contract nego.")); 3489 ct_evtype = ldi_contract_event(evname); 3490 retc = contract_device_negotiate(dip, dev, spec_type, ct_evtype); 3491 if (retc == CT_NACK) { 3492 LDI_EVDBG((CE_NOTE, "ldi_ev_notify(): contract neg. NACK")); 3493 return (LDI_EV_FAILURE); 3494 } 3495 3496 LDI_EVDBG((CE_NOTE, "ldi_ev_notify(): LDI invoke notify")); 3497 retl = ldi_invoke_notify(dip, dev, spec_type, evname, ev_data); 3498 if (retl == LDI_EV_FAILURE) { 3499 LDI_EVDBG((CE_NOTE, "ldi_ev_notify(): ldi_invoke_notify " 3500 "returned FAILURE. Calling contract negend")); 3501 contract_device_negend(dip, dev, spec_type, CT_EV_FAILURE); 3502 return (LDI_EV_FAILURE); 3503 } 3504 3505 /* 3506 * The very fact that we are here indicates that there is a 3507 * LDI callback (and hence a constraint) for the retire of the 3508 * HW device. So we just return success even if there are no 3509 * contracts or LDI callbacks against the minors layered on top 3510 * of the HW minors 3511 */ 3512 LDI_EVDBG((CE_NOTE, "ldi_ev_notify(): returning SUCCESS")); 3513 return (LDI_EV_SUCCESS); 3514 } 3515 3516 /* 3517 * LDI framework function to invoke "finalize" callbacks for all layered 3518 * drivers that have registered callbacks for that event. 3519 * 3520 * This function is *not* to be called by layered drivers. It is for I/O 3521 * framework code in Solaris, such as the I/O retire code and DR code 3522 * to call while servicing a device event such as offline or degraded. 3523 */ 3524 void 3525 ldi_invoke_finalize(dev_info_t *dip, dev_t dev, int spec_type, char *event, 3526 int ldi_result, void *ev_data) 3527 { 3528 ldi_ev_callback_impl_t *lecp; 3529 list_t *listp; 3530 char *lec_event; 3531 int found = 0; 3532 3533 ASSERT(dip); 3534 ASSERT(dev != DDI_DEV_T_NONE); 3535 ASSERT(dev != NODEV); 3536 ASSERT((dev == DDI_DEV_T_ANY && spec_type == 0) || 3537 (spec_type == S_IFCHR || spec_type == S_IFBLK)); 3538 ASSERT(event); 3539 ASSERT(ldi_native_event(event)); 3540 ASSERT(ldi_result == LDI_EV_SUCCESS || ldi_result == LDI_EV_FAILURE); 3541 3542 LDI_EVDBG((CE_NOTE, "ldi_invoke_finalize(): entered: dip=%p, result=%d" 3543 " event=%s", (void *)dip, ldi_result, event)); 3544 3545 ldi_ev_lock(); 3546 listp = &ldi_ev_callback_list.le_head; 3547 for (lecp = list_head(listp); lecp; lecp = list_next(listp, lecp)) { 3548 3549 if (lecp->lec_finalize == NULL) { 3550 LDI_EVDBG((CE_NOTE, "ldi_invoke_finalize(): No " 3551 "finalize. Skipping")); 3552 continue; /* Not interested in finalize */ 3553 } 3554 3555 /* 3556 * Check if matching device 3557 */ 3558 if (!ldi_ev_device_match(lecp, dip, dev, spec_type)) 3559 continue; 3560 3561 /* 3562 * It is valid for the LDI handle to be NULL during finalize. 3563 * The layered driver may have done an LDI close in the notify 3564 * callback. 3565 */ 3566 3567 /* 3568 * Check if matching event 3569 */ 3570 lec_event = ldi_ev_get_type(lecp->lec_cookie); 3571 if (strcmp(event, lec_event) != 0) { 3572 LDI_EVDBG((CE_NOTE, "ldi_invoke_finalize(): Not " 3573 "matching event {%s,%s}. Skipping", 3574 event, lec_event)); 3575 continue; 3576 } 3577 3578 LDI_EVDBG((CE_NOTE, "ldi_invoke_finalize(): calling finalize")); 3579 3580 found = 1; 3581 3582 lecp->lec_finalize(lecp->lec_lhp, lecp->lec_cookie, 3583 ldi_result, lecp->lec_arg, ev_data); 3584 3585 /* 3586 * If LDI native event and LDI handle closed in context 3587 * of notify, NULL out the finalize callback as we have 3588 * already called the 1 finalize above allowed in this situation 3589 */ 3590 if (lecp->lec_lhp == NULL && 3591 ldi_native_cookie(lecp->lec_cookie)) { 3592 LDI_EVDBG((CE_NOTE, 3593 "ldi_invoke_finalize(): NULLing finalize after " 3594 "calling 1 finalize following ldi_close")); 3595 lecp->lec_finalize = NULL; 3596 } 3597 } 3598 ldi_ev_unlock(); 3599 3600 if (found) 3601 return; 3602 3603 LDI_EVDBG((CE_NOTE, "ldi_invoke_finalize(): no matching callbacks")); 3604 } 3605 3606 /* 3607 * Framework function to be called from a layered driver to propagate 3608 * LDI "finalize" events to exported minors. 3609 * 3610 * This function is a public interface exported by the LDI framework 3611 * for use by layered drivers to propagate device events up the software 3612 * stack. 3613 */ 3614 void 3615 ldi_ev_finalize(dev_info_t *dip, minor_t minor, int spec_type, int ldi_result, 3616 ldi_ev_cookie_t cookie, void *ev_data) 3617 { 3618 dev_t dev; 3619 major_t major; 3620 char *evname; 3621 int ct_result = (ldi_result == LDI_EV_SUCCESS) ? 3622 CT_EV_SUCCESS : CT_EV_FAILURE; 3623 uint_t ct_evtype; 3624 3625 ASSERT(dip); 3626 ASSERT(spec_type == S_IFBLK || spec_type == S_IFCHR); 3627 ASSERT(ldi_result == LDI_EV_SUCCESS || ldi_result == LDI_EV_FAILURE); 3628 ASSERT(ldi_native_cookie(cookie)); 3629 3630 LDI_EVDBG((CE_NOTE, "ldi_ev_finalize: entered: dip=%p", (void *)dip)); 3631 3632 major = ddi_driver_major(dip); 3633 if (major == DDI_MAJOR_T_NONE) { 3634 char *path = kmem_alloc(MAXPATHLEN, KM_SLEEP); 3635 (void) ddi_pathname(dip, path); 3636 cmn_err(CE_WARN, "ldi_ev_finalize: cannot derive major number " 3637 "for device %s", path); 3638 kmem_free(path, MAXPATHLEN); 3639 return; 3640 } 3641 dev = makedevice(major, minor); 3642 3643 evname = ldi_ev_get_type(cookie); 3644 3645 LDI_EVDBG((CE_NOTE, "ldi_ev_finalize: calling contracts")); 3646 ct_evtype = ldi_contract_event(evname); 3647 contract_device_finalize(dip, dev, spec_type, ct_evtype, ct_result); 3648 3649 LDI_EVDBG((CE_NOTE, "ldi_ev_finalize: calling ldi_invoke_finalize")); 3650 ldi_invoke_finalize(dip, dev, spec_type, evname, ldi_result, ev_data); 3651 } 3652 3653 int 3654 ldi_ev_remove_callbacks(ldi_callback_id_t id) 3655 { 3656 ldi_ev_callback_impl_t *lecp; 3657 ldi_ev_callback_impl_t *next; 3658 ldi_ev_callback_impl_t *found; 3659 list_t *listp; 3660 3661 ASSERT(!servicing_interrupt()); 3662 3663 if (id == 0) { 3664 cmn_err(CE_WARN, "ldi_ev_remove_callbacks: Invalid ID 0"); 3665 return (LDI_EV_FAILURE); 3666 } 3667 3668 LDI_EVDBG((CE_NOTE, "ldi_ev_remove_callbacks: entered: id=%p", 3669 (void *)id)); 3670 3671 ldi_ev_lock(); 3672 3673 listp = &ldi_ev_callback_list.le_head; 3674 next = found = NULL; 3675 for (lecp = list_head(listp); lecp; lecp = next) { 3676 next = list_next(listp, lecp); 3677 if (lecp->lec_id == id) { 3678 ASSERT(found == NULL); 3679 list_remove(listp, lecp); 3680 found = lecp; 3681 } 3682 } 3683 ldi_ev_unlock(); 3684 3685 if (found == NULL) { 3686 cmn_err(CE_WARN, "No LDI event handler for id (%p)", 3687 (void *)id); 3688 return (LDI_EV_SUCCESS); 3689 } 3690 3691 if (!ldi_native_cookie(found->lec_cookie)) { 3692 ASSERT(found->lec_notify == NULL); 3693 if (ddi_remove_event_handler((ddi_callback_id_t)id) 3694 != DDI_SUCCESS) { 3695 cmn_err(CE_WARN, "failed to remove NDI event handler " 3696 "for id (%p)", (void *)id); 3697 ldi_ev_lock(); 3698 list_insert_tail(listp, found); 3699 ldi_ev_unlock(); 3700 return (LDI_EV_FAILURE); 3701 } 3702 LDI_EVDBG((CE_NOTE, "ldi_ev_remove_callbacks: NDI event " 3703 "service removal succeeded")); 3704 } else { 3705 LDI_EVDBG((CE_NOTE, "ldi_ev_remove_callbacks: removed " 3706 "LDI native callbacks")); 3707 } 3708 kmem_free(found, sizeof (ldi_ev_callback_impl_t)); 3709 3710 return (LDI_EV_SUCCESS); 3711 } 3712
Indexes created Wed Nov 25 02:57:28 UTC 2009
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