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 /* 23 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #ifndef _SYS_MDVAR_H 28 #define _SYS_MDVAR_H 29 30 #include <sys/types.h> 31 #include <sys/kmem.h> 32 #include <sys/mkdev.h> 33 #include <sys/param.h> 34 #include <sys/systm.h> 35 #include <sys/t_lock.h> 36 #include <sys/open.h> 37 #include <sys/devops.h> 38 #include <sys/modctl.h> 39 #ifdef DEBUG 40 #include <sys/thread.h> 41 #endif 42 #include <sys/kstat.h> 43 #include <sys/efi_partition.h> 44 #include <sys/byteorder.h> 45 #include <sys/door.h> 46 47 #include <sys/lvm/mdmn_commd.h> 48 #include <sys/lvm/mdio.h> 49 #include <sys/lvm/md_mdiox.h> 50 #include <sys/lvm/md_mddb.h> 51 #include <sys/lvm/md_notify.h> 52 53 #ifdef __cplusplus 54 extern "C" { 55 #endif 56 57 /* 58 * defaults 59 */ 60 #define NMD_DEFAULT 128 /* number of metadevices */ 61 #define MD_NOPS 25 /* number of misc modules */ 62 #define MAXBOOTLIST 64 63 64 /* 65 * Needed for backwards-compatibility with metadevices created under 66 * 2.6 or earlier. Back then, a krwlock_t was twelve bytes. More 67 * recently, it's four bytes. Since these get included in structures 68 * written out to disk, we have to make sure we're using the largest 69 * size. Things will get interesting if krwlock_t ever gets bigger 70 * than twelve bytes. 71 */ 72 73 typedef union _md_krwlock { 74 krwlock_t lock; 75 struct { 76 void *_opaque[3]; 77 } xx; 78 } md_krwlock_t; 79 80 typedef struct { 81 kmutex_t md_io_mx; /* counter mutex */ 82 kcondvar_t md_io_cv; /* ioctl wait on if draining */ 83 long io_cnt; /* number of I/Os */ 84 long io_state; /* !0 if waiting on zero */ 85 } md_set_io_t; 86 87 typedef enum set_iostate { 88 MD_SET_ACTIVE = 1, 89 MD_SET_RELEASE = 2 90 }set_iostate_t; 91 92 /* 93 * for md_dev64_t translation 94 */ 95 struct md_xlate_table { 96 dev32_t mini_devt; 97 dev32_t targ_devt; 98 }; 99 100 extern struct md_xlate_table *md_tuple_table; 101 102 /* 103 * for major number translation 104 */ 105 106 struct md_xlate_major_table { 107 char *drv_name; 108 major_t targ_maj; 109 }; 110 111 extern struct md_xlate_major_table *md_major_tuple_table; 112 113 extern int md_tuple_length; 114 extern uint_t md_majortab_len; 115 extern int md_in_upgrade; 116 117 extern md_mn_nodeid_t md_mn_mynode_id; 118 119 #define MD_UPGRADE (md_in_upgrade == 1) 120 121 /* 122 * Flags used during upgrade: 123 * 124 * md_keep_repl_state flag means that mddb should be kept in the format 125 * that was found on disk (non-device id format vs. device id format). 126 * This is used during the upgrade process when install is probing 127 * for root disks so that the user can choose the one to be upgraded. 128 * 129 * md_devid_destroy flag is used to destroy device ids stored in the 130 * metadevice state database (mddb). 131 * 132 * The md_devid_destroy flag is to be used only in a catastrophic failure 133 * case. An example of this would be if a user upgrades firmware on all 134 * disks where this causes the disks to now have different device id's. 135 * The user would not be able to boot a mirror'd root filesystem since the 136 * system would recognize none of the device id's stored in the mddb. 137 * This flag would destroy all device id information stored in the mddb and 138 * if the md_keep_repl_state flag was not set, the mddb would be reconverted 139 * to device id format on SLVM startup and all of the device id 140 * information would be regenerated. 141 * 142 * If the md_devid_destroy flag is set and the md_keep_repl_state flag is 143 * set, the mddb's would have their device id information destroyed and 144 * would be left in non-devid format since the device id information would 145 * not be regenerated. 146 * 147 * This flag is not documented anywhere and is only to be used as a last 148 * resort as in the described case or if a device driver has a bug where 149 * device id's are found to not be unique. If device id's aren't unique, 150 * the user could run without device id's until a patch is released for 151 * that driver. 152 */ 153 extern int md_keep_repl_state; 154 extern int md_devid_destroy; 155 extern int mdmn_door_did; 156 #ifdef _KERNEL 157 extern door_handle_t mdmn_door_handle; 158 #endif /* _KERNEL */ 159 160 /* 161 * An io_lock mechanism for raid, the MD_UL_XXXX bits are used for 162 * convenience. 163 */ 164 typedef struct md_io_lock { 165 ulong_t io_readercnt; /* number of unit readers */ 166 ulong_t io_wanabecnt; /* # pending on becoming unit writer */ 167 ulong_t io_lock; 168 void *io_list_front; 169 void *io_list_back; 170 kmutex_t io_mx; 171 kcondvar_t io_cv; 172 kmutex_t io_list_mutex; /* list of waiting io */ 173 kthread_id_t io_owner; /* writer thread */ 174 } md_io_lock_t; 175 176 /* 177 * The following flags are in un_flag field of mdc_unit struct. 178 */ 179 #define MD_LABELED 0x1 /* First sector of the metadevice is a label */ 180 #define MD_EFILABEL 0x2 /* This md has an EFI label and no vtoc */ 181 182 /* 183 * This is the number of bytes a DKIOCGETEFI ioctl returns 184 * For now it's one time the header and once the size for a partition info 185 */ 186 #define MD_EFI_LABEL_SIZE (sizeof (efi_gpt_t) + sizeof (efi_gpe_t)) 187 188 /* This is the number of bytes consumed by efi_gpe_PartitionName */ 189 #define MD_EFI_PARTNAME_BYTES (EFI_PART_NAME_LEN * sizeof (ushort_t)) 190 191 typedef enum hs_cmds { 192 HS_GET, HS_FREE, HS_BAD, HSP_INCREF, HSP_DECREF, HS_MKDEV 193 } hs_cmds_t; 194 195 typedef struct md_link { 196 struct md_link *ln_next; 197 set_t ln_setno; 198 uint_t ln_id; 199 } md_link_t; 200 201 typedef struct mdi_unit { 202 md_link_t ui_link; 203 ulong_t ui_readercnt; /* number of unit readers */ 204 ulong_t ui_wanabecnt; /* # pending on becoming unit writer */ 205 ulong_t ui_lock; 206 kmutex_t ui_mx; 207 kcondvar_t ui_cv; 208 int ui_opsindex; 209 uint_t ui_ocnt[OTYPCNT]; /* open counts */ 210 md_io_lock_t *ui_io_lock; /* pointer to io lock */ 211 kstat_t *ui_kstat; /* kernel statistics */ 212 kthread_id_t ui_owner; /* writer thread */ 213 uint_t ui_tstate; /* transient state bits */ 214 uint_t ui_capab; /* Capability bits supported */ 215 } mdi_unit_t; 216 217 /* 218 * Following are used with ui_lock 219 * which is in the unit incore structure. 220 */ 221 #define MD_UL_WRITER 0x0001 /* Stall all new strategy calls */ 222 #define MD_UL_WANABEWRITER 0x0002 223 #define MD_UL_OPENORCLOSE 0x0004 224 225 #define MD_UL_OPEN 0x0008 /* unit is open */ 226 #define MD_UL_EXCL 0x0010 /* unit is open exclusively */ 227 228 /* 229 * The softpart open code may do an I/O to validate the watermarks 230 * and should hold no open locks during this I/O. So, mark the unit 231 * as OPENINPROGRESS and drop the locks. This will keep any other 232 * softpart open's waiting until the validate has completed. 233 */ 234 #define MD_UL_OPENINPROGRESS 0x0020 /* Open in Progress */ 235 236 /* 237 * Following are used with ui_tstate to specify any transient states which 238 * occur during metadevice operation. These are not written to the metadb as 239 * they do not represent a failure of the underlying metadevice. 240 * Transient errors are stored in the lower 16 bits and other transient 241 * state is stored in the upper 16 bits. 242 * MD_NOTOPENABLE should contain all the states that are set prior to an 243 * open (by snarf) and that indicate that a metadevice cannot be opened. 244 */ 245 #define MD_DEV_ERRORED 0x0000ffff /* ui_tstate error bits */ 246 #define MD_EOF_METADEVICE 0x00000001 /* EOF'd metadevice */ 247 #define MD_64MD_ON_32KERNEL 0x00000002 /* 64bit metadev on 32bit kernel */ 248 #define MD_INACCESSIBLE 0x00000004 /* metadevice unavailable */ 249 #define MD_RETRYING 0x00010000 /* retrying errored failfast I/O */ 250 #define MD_OPENLOCKED 0x00020000 /* MN: open locked before removing */ 251 #define MD_ERR_PENDING 0x00040000 /* MN: error pending */ 252 #define MD_ABR_CAP 0x00080000 /* MN: Application Based Recovery */ 253 #define MD_DMR_CAP 0x00100000 /* MN: Directed Mirror Read */ 254 #define MD_RELEASE_IOERR_DONE 0x00200000 /* ioerr console message done */ 255 #define MD_RESYNC_NOT_DONE 0x00400000 /* resync not done yet */ 256 257 /* A metadevice cannot be opened when these states are set */ 258 #define MD_NOTOPENABLE (MD_EOF_METADEVICE|MD_64MD_ON_32KERNEL) 259 260 typedef struct md_ioctl_lock { 261 int l_flags; /* locks held */ 262 mdi_unit_t *l_ui; /* unit for which lock is held */ 263 } md_ioctl_lock_t; 264 265 #define MD_MASTER_DROPPED 0x0001 266 #define MD_READER_HELD 0x0002 267 #define MD_WRITER_HELD 0x0004 268 #define MD_IO_HELD 0x0008 269 #define MD_ARRAY_READER 0x0010 270 #define MD_ARRAY_WRITER 0x0020 271 #define STALE_OK 0x0100 272 #define NO_OLD 0x0200 273 #define NO_LOCK 0x0400 274 #define MD_MT_IOCTL 0x80000 /* MD_GBL_IOCTL_LOCK not set */ 275 #define IOLOCK md_ioctl_lock_t 276 277 #define WR_LOCK MD_WRITER_HELD 278 #define RD_LOCK MD_READER_HELD | STALE_OK 279 #define ARRAY_WRITER MD_ARRAY_WRITER 280 #define ARRAY_READER MD_ARRAY_READER 281 #define WRITERS MD_WRITER_HELD | MD_IO_HELD | MD_ARRAY_WRITER 282 #define READERS RD_LOCK | MD_ARRAY_READER 283 284 #define IOLOCK_RETURN_IOCTLEND(code, lock) \ 285 md_ioctl_lock_exit((code), (lock)->l_flags, (lock)->l_ui, TRUE) 286 287 #define IOLOCK_RETURN(code, lock) \ 288 md_ioctl_lock_exit((code), (lock)->l_flags, (lock)->l_ui, FALSE) 289 290 #define IOLOCK_RETURN_RELEASE(code, lock) \ 291 md_ioctl_releaselocks((code), (lock)->l_flags, (lock)->l_ui) 292 293 #define IOLOCK_RETURN_REACQUIRE(lock) \ 294 md_ioctl_reacquirelocks((lock)->l_flags, (lock)->l_ui) 295 296 #define IOLOCK_INIT(lock) bzero((caddr_t)(lock), sizeof (*(lock))) 297 /* 298 * checks to be sure locks are held 299 */ 300 #define UNIT_WRITER_HELD(un) \ 301 (MDI_UNIT(MD_SID(un))->ui_lock & MD_UL_WRITER) 302 #define UNIT_READER_HELD(un) \ 303 (MDI_UNIT(MD_SID(un))->ui_readercnt != 0) 304 #define IO_WRITER_HELD(un) \ 305 (MDI_UNIT(MD_SID(un))->ui_io_lock->io_lock & MD_UL_WRITER) 306 #define IO_READER_HELD(un) \ 307 (MDI_UNIT(MD_SID(un))->ui_io_lock->io_readercnt != 0) 308 309 #ifdef DEBUG 310 #define STAT_INC(statvar) \ 311 statvar++ 312 #define STAT_DEC(statvar) \ 313 statvar-- 314 #define STAT_ZERO(statvar) \ 315 statvar = 0; 316 #define STAT_MAX(statmax, statvar) \ 317 { \ 318 statvar++; \ 319 if (statvar > statmax) \ 320 statmax = statvar; \ 321 } 322 #define STAT_CHECK(statvar, value) \ 323 { \ 324 if (value) \ 325 statvar++; \ 326 } 327 #else 328 #define STAT_INC(statvar) 329 #define STAT_DEC(statvar) 330 #define STAT_ZERO(statvar) 331 #define STAT_MAX(statmax, statvar) 332 #define STAT_CHECK(statvar, value) 333 #endif 334 /* 335 * bit map related macros 336 */ 337 #define setbit(a, i) ((a)[(i)/NBBY] |= 1<<((i)%NBBY)) 338 #define clrbit(a, i) ((a)[(i)/NBBY] &= ~(1<<((i)%NBBY))) 339 #define isset(a, i) ((a)[(i)/NBBY] & (1<<((i)%NBBY))) 340 #define isclr(a, i) (((a)[(i)/NBBY] & (1<<((i)%NBBY))) == 0) 341 342 typedef struct daemon_queue { 343 int maxq_len; 344 int qlen; 345 int treqs; /* total number of requests */ 346 struct daemon_queue *dq_next; 347 struct daemon_queue *dq_prev; 348 void (*dq_call)(); 349 } daemon_queue_t; 350 351 #define DAEMON_QUEUE daemon_queue_t dq; 352 353 #ifdef _KERNEL 354 #include <sys/buf.h> 355 #include <sys/dkio.h> 356 #include <sys/vtoc.h> 357 358 #define MD_DEV2SET(d) (MD_MIN2SET(md_getminor(d))) 359 360 #define MD_UNIT(m) (md_set[MD_MIN2SET(m)].s_un[MD_MIN2UNIT(m)]) 361 #define MDI_UNIT(m) ((mdi_unit_t *) \ 362 md_set[MD_MIN2SET(m)].s_ui[MD_MIN2UNIT(m)]) 363 #define MD_VOIDUNIT(m) (md_set[MD_MIN2SET(m)].s_un[MD_MIN2UNIT(m)]) 364 #define MDI_VOIDUNIT(m) (md_set[MD_MIN2SET(m)].s_ui[MD_MIN2UNIT(m)]) 365 366 /* 367 * This is the current maximum number of real disks per Virtual Disk. 368 */ 369 extern uint_t md_mdelay; /* md_mirror timeout delay */ 370 371 #define MD_ADM_MINOR L_MAXMIN32 /* the minor number for md_admin */ 372 #define MD_MDELAY (md_mdelay) 373 #define NUM_USEC_IN_SEC 1000000 /* 1 million usec in a second */ 374 375 #define ANY_SERVICE -1 /* md_get_named_service() wild card */ 376 377 /* 378 * daemon threads are used in multiple places in md. The following set of 379 * structures and routines allow a common way to create and initialize them. 380 * 381 * md_requestq_entry_t - entry of creating request queues. 382 * struct mdq_anchor - request queue header 383 * 384 * Functions associated with request queues: 385 * 386 * int init_requestq_entry - 387 * void daemon_request - put a request on the queue. 388 */ 389 390 typedef struct md_requestq_entry { 391 struct mdq_anchor *dispq_headp; 392 int *num_threadsp; /* threads servicing the queue */ 393 } md_requestq_entry_t; 394 395 #define NULL_REQUESTQ_ENTRY(rqp)\ 396 ((rqp)->dispq_headp == NULL || (rqp)->num_threadsp == NULL) 397 398 /* this typedef is used to differentiate between the two call styles */ 399 typedef enum callstyle { 400 REQ_OLD, 401 REQ_NEW 402 } callstyle_t; 403 404 405 #define daemon_request_new daemon_request 406 407 typedef struct mdq_anchor { 408 DAEMON_QUEUE 409 kcondvar_t a_cv; /* Request has been put on queue */ 410 kmutex_t a_mx; 411 } mdq_anchor_t; 412 413 typedef struct daemon_request { 414 DAEMON_QUEUE 415 kmutex_t dr_mx; 416 int dr_pending; 417 timeout_id_t dr_timeout_id; 418 } daemon_request_t; 419 420 typedef struct sv_dev { 421 set_t setno; 422 side_t side; 423 mdkey_t key; 424 } sv_dev_t; 425 426 /* 427 * Types of device probes 428 */ 429 430 431 typedef struct probe_req { 432 DAEMON_QUEUE 433 minor_t mnum; /* mnum of the metadevice to probe */ 434 void *private_handle; /* private handle */ 435 intptr_t (*probe_fcn)(); /* type of probeing to be done */ 436 } probe_req_t; 437 438 /* Global flags */ 439 #define MD_NO_GBL_LOCKS_HELD 0x0000 /* currently holding no global locks */ 440 #define MD_GBL_DAEMONS_LIVE 0x0001 /* master daemon has been started. */ 441 #define MD_GBL_DAEMONS_DIE 0x0002 442 #define MD_GBL_HALTED 0x0004 /* driver is shut down */ 443 444 /* Available bit was GBL_STALE 0x0008 */ 445 446 #define MD_GBL_IOCTL_LOCK 0x0010 /* single-threads ioctls */ 447 #define MD_GBL_HS_LOCK 0x0020 /* single-threads hotspares */ 448 #define MD_GBL_OPEN 0x0040 /* admin is open */ 449 #define MD_GBL_EXCL 0x0080 /* admin is open exclusively */ 450 451 #define MD_OFLG_NULL 0x0000 /* Null flag */ 452 #define MD_OFLG_CONT_ERRS 0x0001 /* Continue on open errors */ 453 #define MD_OFLG_PROBEDEV 0x0002 /* force a simulated open */ 454 #define MD_OFLG_ISINIT 0x0004 /* raid initialization */ 455 #define MD_OFLG_FROMIOCTL 0x0008 /* Called from an ioctl handler */ 456 457 458 typedef struct md_named_services { 459 460 intptr_t (*md_service)(); 461 char *md_name; 462 } md_named_services_t; 463 464 typedef enum md_snarfcmd {MD_SNARF_CLEANUP, MD_SNARF_DOIT} md_snarfcmd_t; 465 466 typedef struct md_ops { 467 int (*md_open)( 468 dev_t *devp, 469 int flag, 470 int otyp, 471 cred_t *credp, 472 int md_oflags); 473 int (*md_close)( 474 dev_t dev, 475 int flag, 476 int otyp, 477 cred_t *credp, 478 int md_oflags); 479 void (*md_strategy)( 480 buf_t *bufp, 481 int flag, 482 void *private); 483 int (*md_print)(); /* unused now */ 484 int (*md_dump)( 485 dev_t dev, 486 caddr_t addr, 487 daddr_t blkno, 488 int nblk); 489 int (*md_read)( 490 dev_t dev, 491 struct uio *uiop, 492 cred_t *credp); 493 int (*md_write)( 494 dev_t dev, 495 struct uio *uiop, 496 cred_t *credp); 497 int (*md_ioctl)( 498 dev_t dev, 499 int cmd, 500 void *data, 501 int mode, 502 IOLOCK *lockp); 503 int (*md_snarf)( 504 md_snarfcmd_t cmd, 505 set_t setno); 506 int (*md_halt)(); 507 int (*md_aread)( 508 dev_t dev, 509 struct aio_req *aiop, 510 cred_t *credp); 511 int (*md_awrite)( 512 dev_t dev, 513 struct aio_req *aiop, 514 cred_t *credp); 515 int (*md_imp_set)( 516 set_t setno); 517 md_named_services_t *md_services; 518 md_krwlock_t md_link_rw; 519 md_link_t *md_head; 520 /* 521 * NOTE: when TSlvm s10/onnv compatibility is not an issue: 522 * o md_modid and md_locked should be deleted. 523 * o md_mod should be added 524 * ddi_modhandle_t md_mod; 525 * and used instead of the md_mods array (md_mods should 526 * be deleted). 527 */ 528 int md_modid; 529 int md_locked; 530 int md_selfindex; 531 struct md_ops *md_next; 532 md_driver_t md_driver; 533 /* NOTE: TSlvm depends on offsets in and sizeof this structure */ 534 } md_ops_t; 535 536 /* macro to generate linkage for a md misc plugin module */ 537 #define md_noop 538 #define MD_PLUGIN_MISC_MODULE(desc, init_init, fini_uninit) \ 539 static struct modlmisc modlmisc = { \ 540 &mod_miscops, "Solaris Volume Manager " desc \ 541 }; \ 542 static struct modlinkage modlinkage = { \ 543 MODREV_1, (void *)&modlmisc, NULL \ 544 }; \ 545 int \ 546 _init(void) \ 547 { \ 548 int i; \ 549 init_init; \ 550 if ((i = mod_install(&modlinkage)) != 0) { \ 551 fini_uninit; \ 552 } \ 553 return (i); \ 554 } \ 555 int \ 556 _fini() \ 557 { \ 558 int i; \ 559 if ((i = mod_remove(&modlinkage)) == 0) { \ 560 fini_uninit; \ 561 } \ 562 return (i); \ 563 } \ 564 int \ 565 _info(struct modinfo *modinfop) \ 566 { \ 567 return (mod_info(&modlinkage, modinfop)); \ 568 } 569 570 typedef enum md_haltcmd {MD_HALT_ALL, MD_HALT_CHECK, MD_HALT_DOIT, 571 MD_HALT_CLOSE, MD_HALT_OPEN, MD_HALT_UNLOAD 572 } md_haltcmd_t; 573 574 /* 575 * To support cpr (Energy Star) we need to know when the resync threads are 576 * running to not allow suspention. 577 */ 578 typedef struct md_resync_thds_cnt { 579 int md_raid_resync; /* count of active raid resync threads */ 580 int md_mirror_resync; /* count of active mirror resync threads */ 581 kmutex_t md_resync_mutex; /* protects both resync counts */ 582 } md_resync_t; 583 584 /* 585 * flags used with call to individual strategy routines 586 */ 587 #define MD_STR_PASSEDON 0x0000ffff 588 #define MD_STR_NOTTOP 0x00000001 589 #define MD_STR_MAPPED 0x00000002 /* set when buf_t is mapped in */ 590 #define MD_STR_ABR 0x00000004 /* use ABR to handle any recovery */ 591 #define MD_STR_WMUPDATE 0x00000008 /* set if updating watermarks for sp */ 592 #define MD_IO_COUNTED 0x00000400 /* io has been counted */ 593 #define MD_NOBLOCK 0x00000800 /* do not block io durring release */ 594 595 #define MD_STR_WAR 0x00010000 /* this write is write after read */ 596 #define MD_STR_WOW 0x00020000 /* handling a write-on-write */ 597 #define MD_STR_DMR 0x00040000 /* Directed Read request */ 598 #define MD_STR_DIRTY_RD 0x00080000 /* Read of a dirty block */ 599 #define MD_STR_FLAG_ERR 0x00100000 /* Flag any write error on this i/o */ 600 #define MD_STR_BLOCK_OK 0x00200000 /* Flag if caller i/o can be blocked */ 601 602 /* 603 * Bits for return value of md_getdevnum 604 */ 605 #define MD_TRUST_DEVT 1 606 #define MD_NOTRUST_DEVT 0 607 608 /* Flag for drivers to pass to kmem_cache_alloc() */ 609 #define MD_ALLOCFLAGS (KM_PUSHPAGE | KM_SLEEP) 610 611 /* Named services */ 612 #define MD_CHECK_OFFLINE "check_offline" 613 #define MD_INC_ABR_COUNT "inc abr count" 614 #define MD_DEC_ABR_COUNT "dec abr count" 615 616 /* md_getdevname_common flags for namespace lock */ 617 #define MD_WAIT_LOCK 0 618 #define MD_NOWAIT_LOCK 1 619 620 /* Externals from md.c */ 621 extern int md_snarf_db_set(set_t setno, md_error_t *ep); 622 extern void get_info(struct dk_cinfo *, minor_t); 623 extern void get_minfo(struct dk_minfo *, minor_t); 624 extern int mdstrategy(buf_t *); 625 extern int md_create_minor_node(set_t, minor_t); 626 extern void md_nblocks_set(minor_t mnum, uint64_t nblocks); 627 628 /* External from md_subr.c */ 629 extern int md_inc_iocount(set_t); 630 extern void md_inc_iocount_noblock(set_t); 631 extern void md_dec_iocount(set_t); 632 extern int md_isblock_setio(set_t); 633 extern int md_block_setio(set_t); 634 extern void md_clearblock_setio(set_t); 635 extern void md_unblock_setio(set_t); 636 extern int md_tas_block_setio(set_t); 637 extern void md_biodone(struct buf *); 638 extern void md_bioreset(struct buf *); 639 extern md_dev64_t md_xlate_targ_2_mini(md_dev64_t); 640 extern md_dev64_t md_xlate_mini_2_targ(md_dev64_t); 641 extern void md_xlate_free(int); 642 extern major_t md_targ_name_to_major(char *); 643 extern char *md_targ_major_to_name(major_t); 644 extern void md_majortab_free(); 645 extern void md_set_status(int); 646 extern void md_clr_status(int); 647 extern int md_get_status(void); 648 extern void md_set_setstatus(set_t, int); 649 extern void md_clr_setstatus(set_t, int); 650 extern uint_t md_get_setstatus(set_t); 651 extern void *md_unit_readerlock(mdi_unit_t *); 652 extern void *md_unit_writerlock(mdi_unit_t *); 653 extern void md_unit_readerexit(mdi_unit_t *); 654 extern void md_unit_writerexit(mdi_unit_t *); 655 extern void md_ioctl_releaselocks(int, int, mdi_unit_t *); 656 extern void md_ioctl_reacquirelocks(int, mdi_unit_t *); 657 extern int md_ioctl_lock_exit(int, int, mdi_unit_t *, int); 658 extern int md_ioctl_lock_enter(void); 659 extern void *md_ioctl_readerlock(IOLOCK *, mdi_unit_t *); 660 extern void md_ioctl_readerexit(IOLOCK *); 661 extern void *md_ioctl_writerlock(IOLOCK *, mdi_unit_t *); 662 extern void md_ioctl_writerexit(IOLOCK *); 663 extern void md_ioctl_io_exit(IOLOCK *); 664 extern void *md_ioctl_io_lock(IOLOCK *, mdi_unit_t *); 665 extern void md_ioctl_droplocks(IOLOCK *); 666 extern void md_array_writer(IOLOCK *); 667 extern void md_array_reader(IOLOCK *); 668 extern void *md_ioctl_openclose_enter(IOLOCK *, mdi_unit_t *); 669 extern void md_ioctl_openclose_exit(IOLOCK *); 670 extern void md_ioctl_openclose_exit_lh(IOLOCK *); 671 extern void *md_unit_openclose_enter(mdi_unit_t *); 672 extern void md_unit_openclose_exit(mdi_unit_t *); 673 extern void md_unit_openclose_exit_lh(mdi_unit_t *); 674 extern int md_unit_isopen(mdi_unit_t *ui); 675 extern int md_unit_incopen(minor_t mnum, int flag, int otyp); 676 extern int md_unit_decopen(minor_t mnum, int otyp); 677 extern void *md_io_readerlock(mdi_unit_t *); 678 extern void *md_io_writerlock(mdi_unit_t *); 679 extern void md_io_readerexit(mdi_unit_t *); 680 extern void md_io_writerexit(mdi_unit_t *); 681 extern intptr_t (*md_get_named_service())(); 682 extern int init_requestq(md_requestq_entry_t *, void (*)(), 683 caddr_t, int, int); 684 extern void daemon_request(mdq_anchor_t *, void(*)(), 685 daemon_queue_t *, callstyle_t); 686 extern void md_daemon(int, mdq_anchor_t *); 687 extern void mddb_commitrec_wrapper(mddb_recid_t); 688 extern void mddb_commitrecs_wrapper(mddb_recid_t *); 689 extern void mddb_deleterec_wrapper(mddb_recid_t); 690 extern void md_holdset_enter(set_t setno); 691 extern void md_holdset_exit(set_t setno); 692 extern int md_holdset_testandenter(set_t setno); 693 extern void md_haltsnarf_enter(set_t setno); 694 extern void md_haltsnarf_exit(set_t setno); 695 extern void md_haltsnarf_wait(set_t setno); 696 extern int md_halt_set(set_t setno, enum md_haltcmd cmd); 697 extern int md_halt(int global_lock_flag); 698 extern int md_layered_open(minor_t, md_dev64_t *, int); 699 extern void md_layered_close(md_dev64_t, int); 700 extern char *md_get_device_name(md_dev64_t); 701 extern int errdone(mdi_unit_t *, struct buf *, int); 702 extern int md_checkbuf(mdi_unit_t *, md_unit_t *, buf_t *); 703 extern int md_start_daemons(int init_queues); 704 extern int md_loadsubmod(set_t, char *, int); 705 extern int md_getmodindex(md_driver_t *, int, int); 706 extern void md_call_strategy(buf_t *, int, void *); 707 extern int md_call_ioctl(md_dev64_t, int, void *, int, IOLOCK *); 708 extern void md_rem_link(set_t, int, krwlock_t *, md_link_t **); 709 extern int md_dev_exists(md_dev64_t); 710 extern md_parent_t md_get_parent(md_dev64_t); 711 extern void md_set_parent(md_dev64_t, md_parent_t); 712 extern void md_reset_parent(md_dev64_t); 713 extern struct hot_spare_pool *find_hot_spare_pool(set_t, int); 714 extern int md_hot_spare_ifc(hs_cmds_t, mddb_recid_t, u_longlong_t, int, 715 mddb_recid_t *, mdkey_t *, md_dev64_t *, diskaddr_t *); 716 extern int md_notify_interface(md_event_cmds_t cmd, md_tags_t type, 717 set_t set, md_dev64_t dev, md_event_type_t event); 718 extern void svm_gen_sysevent(char *se_class, char *se_subclass, 719 uint32_t tag, set_t setno, md_dev64_t devid); 720 extern void md_create_unit_incore(minor_t, md_ops_t *, int); 721 extern void md_destroy_unit_incore(minor_t, md_ops_t *); 722 extern void md_rem_names(sv_dev_t *, int); 723 struct uio; 724 extern int md_chk_uio(struct uio *); 725 extern char *md_shortname(minor_t mnum); 726 extern char *md_devname(set_t setno, md_dev64_t dev, char *buf, 727 size_t size); 728 extern void md_minphys(buf_t *); 729 extern void md_kstat_init(minor_t mnum); 730 extern void md_kstat_init_ui(minor_t mnum, mdi_unit_t *ui); 731 extern void md_kstat_destroy(minor_t mnum); 732 extern void md_kstat_destroy_ui(mdi_unit_t *ui); 733 extern void md_kstat_waitq_enter(mdi_unit_t *ui); 734 extern void md_kstat_waitq_to_runq(mdi_unit_t *ui); 735 extern void md_kstat_waitq_exit(mdi_unit_t *ui); 736 extern void md_kstat_runq_enter(mdi_unit_t *ui); 737 extern void md_kstat_runq_exit(mdi_unit_t *ui); 738 extern void md_kstat_done(mdi_unit_t *ui, buf_t *bp, int war); 739 extern pid_t md_getpid(void); 740 extern proc_t *md_getproc(void); 741 extern int md_checkpid(pid_t pid, proc_t *proc); 742 extern char *md_strdup(char *cp); 743 extern void freestr(char *cp); 744 extern int md_check_ioctl_against_unit(int, mdc_unit_t); 745 extern mddb_recid_t md_vtoc_to_efi_record(mddb_recid_t, set_t); 746 747 extern int mdmn_ksend_message(set_t, md_mn_msgtype_t, uint_t, 748 md_mn_nodeid_t, char *, int, md_mn_kresult_t *); 749 extern void mdmn_ksend_show_error(int, md_mn_kresult_t *, const char *); 750 extern int mdmn_send_capability_message(minor_t, volcap_t, IOLOCK *); 751 extern void mdmn_clear_all_capabilities(minor_t); 752 extern int md_init_probereq(struct md_probedev_impl *p, 753 daemon_queue_t **hdrpp); 754 extern boolean_t callb_md_mrs_cpr(void *, int); 755 extern void md_upd_set_unnext(set_t, unit_t); 756 extern int md_rem_selfname(minor_t); 757 extern void md_rem_hspname(set_t, mdkey_t); 758 extern void *md_create_taskq(set_t, minor_t); 759 760 /* Externals from md_ioctl.c */ 761 extern int md_mn_is_commd_present(void); 762 extern int md_mn_is_commd_present_lite(void); 763 extern void md_mn_clear_commd_present(void); 764 extern int md_admin_ioctl(md_dev64_t, int, caddr_t, int, IOLOCK *lockp); 765 extern void md_get_geom(md_unit_t *, struct dk_geom *); 766 extern int md_set_vtoc(md_unit_t *, struct vtoc *); 767 extern void md_get_vtoc(md_unit_t *, struct vtoc *); 768 extern int md_set_extvtoc(md_unit_t *, struct extvtoc *); 769 extern void md_get_extvtoc(md_unit_t *, struct extvtoc *); 770 extern void md_get_cgapart(md_unit_t *, struct dk_map *); 771 extern void md_get_efi(md_unit_t *, char *); 772 extern int md_set_efi(md_unit_t *, char *); 773 extern int md_dkiocgetefi(minor_t, void *, int); 774 extern int md_dkiocsetefi(minor_t, void *, int); 775 extern int md_dkiocpartition(minor_t, void *, int); 776 extern void md_remove_minor_node(minor_t); 777 778 779 /* Externals from md_names.c */ 780 extern mdkey_t md_setdevname(set_t, side_t, mdkey_t, char *, minor_t, char *, 781 int imp_flag, ddi_devid_t devid, char *minorname, 782 set_t, md_error_t *); 783 extern int md_getdevname(set_t, side_t, mdkey_t, md_dev64_t, char *, 784 size_t); 785 extern int md_getdevname_common(set_t, side_t, mdkey_t, md_dev64_t, char *, 786 size_t, int); 787 extern int md_gethspinfo(set_t, side_t, mdkey_t, char *, hsp_t *, 788 char *); 789 extern int md_getkeyfromdev(set_t, side_t, md_dev64_t, mdkey_t *, int *); 790 extern int md_devid_found(set_t, side_t, mdkey_t); 791 extern int md_getnment(set_t, side_t, mdkey_t, md_dev64_t, 792 char *, uint_t, major_t *, minor_t *, mdkey_t *); 793 extern md_dev64_t md_getdevnum(set_t, side_t, mdkey_t, int); 794 extern mdkey_t md_getnextkey(set_t, side_t, mdkey_t, uint_t *); 795 extern int md_remdevname(set_t, side_t, mdkey_t); 796 extern mdkey_t md_setshared_name(set_t, char *, int); 797 extern char *md_getshared_name(set_t, mdkey_t); 798 extern int md_remshared_name(set_t, mdkey_t); 799 extern mdkey_t md_getshared_key(set_t, char *); 800 extern int md_setshared_data(set_t, uint_t, caddr_t); 801 extern caddr_t md_getshared_data(set_t, uint_t); 802 extern int md_load_namespace(set_t, md_error_t *ep, int); 803 extern void md_unload_namespace(set_t, int); 804 extern int md_nm_did_chkspace(set_t); 805 extern void md_bioinit(); 806 extern buf_t *md_bioclone(buf_t *, off_t, size_t, dev_t, diskaddr_t, 807 int (*)(buf_t *), buf_t *, int); 808 extern int md_getdevid(set_t setno, side_t side, mdkey_t key, 809 ddi_devid_t devid, ushort_t *did_size); 810 extern int md_getdevidminor(set_t setno, side_t side, mdkey_t key, 811 char *minorname, size_t minorname_len); 812 extern int md_update_namespace(set_t setno, side_t side, mdkey_t key, 813 caddr_t devname, caddr_t pathname, minor_t mnum); 814 extern int md_update_locator_namespace(set_t setno, side_t side, 815 caddr_t devname, caddr_t pathname, md_dev64_t devt); 816 extern int md_update_namespace_did(set_t setno, side_t side, mdkey_t key, 817 md_error_t *ep); 818 extern int md_validate_devid(set_t setno, side_t side, int *maxsz); 819 extern int md_get_invdid(set_t setno, side_t side, int cnt, int maxsz, 820 void *didptr); 821 extern md_dev64_t md_resolve_bydevid(minor_t, md_dev64_t, mdkey_t key); 822 extern md_dev64_t md_expldev(md_dev64_t); 823 extern dev32_t md_cmpldev(md_dev64_t); 824 extern dev_t md_dev64_to_dev(md_dev64_t); 825 extern md_dev64_t md_makedevice(major_t, minor_t); 826 extern major_t md_getmajor(md_dev64_t); 827 extern minor_t md_getminor(md_dev64_t); 828 extern void md_timeval(md_timeval32_t *); 829 extern int md_imp_snarf_set(mddb_config_t *); 830 831 /* externals from md_mddb.c */ 832 extern int mddb_reread_rr(set_t, mddb_recid_t); 833 extern int mddb_setowner(mddb_recid_t id, md_mn_nodeid_t owner); 834 extern int mddb_parse(mddb_parse_parm_t *mpp); 835 extern int mddb_block(mddb_block_parm_t *mpp); 836 extern int mddb_optrecfix(mddb_optrec_parm_t *mop); 837 extern int mddb_check_write_ioctl(mddb_config_t *info); 838 extern int mddb_setflags_ioctl(mddb_setflags_config_t *info); 839 extern struct nm_next_hdr *get_first_record(set_t, int, int); 840 extern void *lookup_entry(struct nm_next_hdr *, set_t, 841 side_t, mdkey_t, md_dev64_t, int); 842 extern void *lookup_shared_entry(struct nm_next_hdr *, 843 mdkey_t key, char *, mddb_recid_t *, int); 844 extern int remove_shared_entry(struct nm_next_hdr *, mdkey_t key, 845 char *, int); 846 extern void *alloc_entry(struct nm_next_hdr *, mddb_recid_t, size_t, int, 847 mddb_recid_t *); 848 extern void *getshared_name(set_t, mdkey_t, int); 849 850 #endif /* _KERNEL */ 851 852 853 /* externals from md_revchk.c */ 854 extern int revchk(uint_t my_rev, uint_t data); 855 856 857 #ifdef __cplusplus 858 } 859 #endif 860 861 #endif /* _SYS_MDVAR_H */ 862