1 /*- 2 * Copyright (c) 1997, 1998, 1999 3 * Nan Yang Computer Services Limited. All rights reserved. 4 * 5 * Parts copyright (c) 1997, 1998 Cybernet Corporation, NetMAX project. 6 * 7 * Written by Greg Lehey 8 * 9 * This software is distributed under the so-called ``Berkeley 10 * License'': 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by Nan Yang Computer 23 * Services Limited. 24 * 4. Neither the name of the Company nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * This software is provided ``as is'', and any express or implied 29 * warranties, including, but not limited to, the implied warranties of 30 * merchantability and fitness for a particular purpose are disclaimed. 31 * In no event shall the company or contributors be liable for any 32 * direct, indirect, incidental, special, exemplary, or consequential 33 * damages (including, but not limited to, procurement of substitute 34 * goods or services; loss of use, data, or profits; or business 35 * interruption) however caused and on any theory of liability, whether 36 * in contract, strict liability, or tort (including negligence or 37 * otherwise) arising in any way out of the use of this software, even if 38 * advised of the possibility of such damage. 39 */ 40 41 #include <sys/time.h> 42 #include "vinumstate.h" 43 44 /* 45 * A disk block number or offset 46 */ 47 typedef int64_t vinum_off_t; 48 49 /* 50 * Some configuration maxima. They're an enum because 51 * we can't define global constants. Sorry about that. 52 * 53 * These aren't as bad as they look: most of them are soft limits. 54 */ 55 56 #define VINUMROOT 57 enum constants { 58 VINUM_HEADER = 512, /* size of header on disk */ 59 MAXCONFIGLINE = 1024, /* maximum size of one config line */ 60 MINVINUMSLICE = 1048576, /* minimum size of a slice */ 61 62 ROUND_ROBIN_READPOL = -1, /* round robin read policy */ 63 64 /* 65 * type field in minor number 66 */ 67 VINUM_VOLUME_TYPE = 0, 68 VINUM_PLEX_TYPE = 1, 69 VINUM_SD_TYPE = 2, 70 VINUM_DRIVE_TYPE = 3, 71 VINUM_SUPERDEV_TYPE = 4, /* super device. */ 72 VINUM_RAWPLEX_TYPE = 5, /* anonymous plex */ 73 VINUM_RAWSD_TYPE = 6, /* anonymous subdisk */ 74 75 /* 76 * Shifts for the individual fields in the device 77 */ 78 VINUM_TYPE_SHIFT = 28, 79 VINUM_VOL_SHIFT = 0, 80 VINUM_PLEX_SHIFT = 16, 81 VINUM_SD_SHIFT = 20, 82 VINUM_VOL_WIDTH = 8, 83 VINUM_PLEX_WIDTH = 3, 84 VINUM_SD_WIDTH = 8, 85 86 /* 87 * Shifts for the second half of raw plex and 88 * subdisk numbers 89 */ 90 VINUM_RAWPLEX_SHIFT = 8, /* shift the second half this much */ 91 VINUM_RAWPLEX_WIDTH = 12, /* width of second half */ 92 93 MAJORDEV_SHIFT = 8, 94 95 MAXPLEX = 8, /* max number of plexes in a volume */ 96 MAXSD = 256, /* max number of subdisks in a plex */ 97 MAXDRIVENAME = 32, /* max length of a device name */ 98 MAXSDNAME = 64, /* max length of a subdisk name */ 99 MAXPLEXNAME = 64, /* max length of a plex name */ 100 MAXVOLNAME = 64, /* max length of a volume name */ 101 MAXNAME = 64, /* max length of any name */ 102 103 104 /* 105 * Define a minor device number. 106 * This is not used directly; instead, it's 107 * called by the other macros. 108 */ 109 #define VINUMMINOR(v,p,s,t) ( (v << VINUM_VOL_SHIFT) \ 110 | (p << VINUM_PLEX_SHIFT) \ 111 | (s << VINUM_SD_SHIFT) \ 112 | (t << VINUM_TYPE_SHIFT) ) 113 114 /* Create device minor numbers */ 115 116 #ifdef _KERNEL 117 118 #define VINUMDEV(v,p,s,t) \ 119 VINUMMINOR (v, p, s, t) 120 121 #define VINUM_PLEX(p) \ 122 ((VINUM_RAWPLEX_TYPE << VINUM_TYPE_SHIFT) \ 123 | (p & 0xff) \ 124 | ((p & ~0xff) << 8)) 125 126 #define VINUM_SD(s) \ 127 ((VINUM_RAWSD_TYPE << VINUM_TYPE_SHIFT) \ 128 | (s & 0xff) \ 129 | ((s & ~0xff) << 8)) 130 131 #endif 132 133 /* Create a bit mask for x bits */ 134 #define MASK(x) ((1 << (x)) - 1) 135 136 /* Create a raw block device minor number */ 137 #define VINUMRMINOR(d,t) \ 138 ( ((d & MASK(VINUM_VOL_WIDTH)) << VINUM_VOL_SHIFT) \ 139 | ((d & ~MASK(VINUM_VOL_WIDTH)) << \ 140 (VINUM_PLEX_SHIFT + VINUM_VOL_WIDTH)) \ 141 | (t << VINUM_TYPE_SHIFT) ) 142 143 /* extract device type */ 144 #define DEVTYPE(x) ((minor (x) >> VINUM_TYPE_SHIFT) & 7) 145 146 /* 147 * This mess is used to catch people who compile 148 * a debug vinum(8) and non-debug kernel module, 149 * or the other way round. 150 */ 151 152 #ifdef VINUMDEBUG 153 154 /* superdevice number */ 155 #define VINUM_SUPERDEV VINUMMINOR(1, 0, 0, VINUM_SUPERDEV_TYPE) 156 157 /* non-debug superdevice number */ 158 #define VINUM_WRONGSUPERDEV VINUMMINOR(2, 0, 0, VINUM_SUPERDEV_TYPE) 159 160 #else 161 162 /* superdevice number */ 163 #define VINUM_SUPERDEV VINUMMINOR(2, 0, 0, VINUM_SUPERDEV_TYPE) 164 165 /* debug superdevice number */ 166 #define VINUM_WRONGSUPERDEV VINUMMINOR(1, 0, 0, VINUM_SUPERDEV_TYPE) 167 168 #endif 169 170 /* daemon superdevice number */ 171 #define VINUM_DAEMON_DEV VINUMMINOR(0, 0, 0, VINUM_SUPERDEV_TYPE) 172 173 /* 174 * the number of object entries to cater for initially, and also the 175 * value by which they are incremented. It doesn't take long 176 * to extend them, so theoretically we could start with 1 of each, but 177 * it's untidy to allocate such small areas. These values are 178 * probably too small. 179 */ 180 181 INITIAL_DRIVES = 4, 182 INITIAL_VOLUMES = 4, 183 INITIAL_PLEXES = 8, 184 INITIAL_SUBDISKS = 16, 185 INITIAL_SUBDISKS_IN_PLEX = 4, /* num subdisks to alloc to a plex */ 186 INITIAL_SUBDISKS_IN_DRIVE = 4, /* num subdisks to alloc to a drive */ 187 INITIAL_DRIVE_FREELIST = 16, /* num entries in drive freelist */ 188 PLEX_REGION_TABLE_SIZE = 8, /* num entries in plex region tables */ 189 PLEX_LOCKS = 256, /* num locks to alloc to a plex */ 190 MAX_REVIVE_BLOCKSIZE = MAXPHYS, /* maximum revive block size */ 191 DEFAULT_REVIVE_BLOCKSIZE = 65536,/* default revive block size */ 192 VINUMHOSTNAMELEN = 32, /* host name field in label */ 193 }; 194 195 /* device numbers */ 196 197 /* 198 * 31 30 28 27 20 19 18 16 15 8 7 0 199 * |---------------------------------------------------------------------| 200 * |X | Type | Subdisk number | X| Plex | Major | volno | 201 * |---------------------------------------------------------------------| 202 * 203 * 0x2 03 1 19 06 204 * 205 * The fields in the minor number are interpreted as follows: 206 * 207 * Volume: Only type and volume number are relevant 208 * Plex in volume: type, plex number in volume and volume number 209 * are relevant 210 * raw plex: type, plex number is made of bits 27-16 and 7-0 211 * raw subdisk: type, subdisk number is made of bits 27-16 and 7-0 212 */ 213 214 #if 0 215 216 /* This doesn't get used. Consider removing it. */ 217 struct devcode { 218 /* 219 * CARE. These fields assume a big-endian word. On a 220 * little-endian system, they're the wrong way around 221 */ 222 unsigned volume:8; /* up to 256 volumes */ 223 unsigned major:8; /* major number fits */ 224 unsigned plex:3; /* up to 8 plexes per volume */ 225 unsigned unused:1; /* up for grabs */ 226 unsigned sd:8; /* up to 256 subdisks per plex */ 227 unsigned type:3; /* type of object */ 228 /* 229 * type field 230 VINUM_VOLUME = 0, 231 VINUM_PLEX = 1, 232 VINUM_SUBDISK = 2, 233 VINUM_DRIVE = 3, 234 VINUM_SUPERDEV = 4, 235 VINUM_RAWPLEX = 5, 236 VINUM_RAWSD = 6 */ 237 unsigned signbit:1; /* to make 32 bits */ 238 }; 239 240 #endif 241 242 #define VINUM_BASE "vinum/" 243 #define VINUM_DIR "/dev/vinum" 244 245 /* 246 * These definitions help catch 247 * userland/kernel mismatches. 248 */ 249 #if VINUMDEBUG 250 251 /* normal super device */ 252 #define VINUM_WRONGSUPERDEV_NAME VINUM_DIR "/control" 253 #define VINUM_WRONGSUPERDEV_BASE VINUM_BASE "control" 254 255 /* debug super device */ 256 #define VINUM_SUPERDEV_NAME VINUM_DIR "/Control" 257 #define VINUM_SUPERDEV_BASE VINUM_BASE "Control" 258 259 #else 260 261 /* debug super device */ 262 #define VINUM_WRONGSUPERDEV_NAME VINUM_DIR "/Control" 263 #define VINUM_WRONGSUPERDEV_BASE VINUM_BASE "Control" 264 265 /* normal super device */ 266 #define VINUM_SUPERDEV_NAME VINUM_DIR "/control" 267 #define VINUM_SUPERDEV_BASE VINUM_BASE "control" 268 269 #endif 270 271 /* super device for daemon only */ 272 #define VINUM_DAEMON_DEV_NAME VINUM_DIR "/controld" 273 #define VINUM_DAEMON_DEV_BASE VINUM_BASE "controld" 274 275 /* 276 * Flags for all objects. Most of them only apply to 277 * specific objects, but we have space for all in any 278 * 32 bit flags word. 279 */ 280 enum objflags { 281 VF_LOCKED = 1, /* locked access to this object */ 282 VF_LOCKING = 2, /* we want access to this object */ 283 VF_OPEN = 4, /* object has openers */ 284 VF_WRITETHROUGH = 8, /* volume: write through */ 285 VF_INITED = 0x10, /* unit has been initialized */ 286 287 /* 0x20 unused, was: VF_WLABEL: label area is writable */ 288 VF_LABELLING = 0x40, /* unit is currently being labelled */ 289 VF_WANTED = 0x80, /* waiting to obtain a lock */ 290 VF_RAW = 0x100, /* raw volume (no file system) */ 291 VF_LOADED = 0x200, /* module is loaded */ 292 VF_CONFIGURING = 0x400, /* someone is changing the config */ 293 VF_WILL_CONFIGURE = 0x800, /* someone wants to change the config */ 294 VF_CONFIG_INCOMPLETE = 0x1000, /* not finished changing the config */ 295 VF_CONFIG_SETUPSTATE = 0x2000, /* set a vol up if all plexes empty */ 296 VF_READING_CONFIG = 0x4000, /* reading config database from disk */ 297 VF_FORCECONFIG = 0x8000, /* config drives even with diff names */ 298 VF_NEWBORN = 0x10000, /* for objects: we've just created it */ 299 VF_CONFIGURED = 0x20000, /* for drives: we read the config */ 300 VF_STOPPING = 0x40000, /* for vinum_conf: stop on last close */ 301 302 VF_DAEMONOPEN = 0x80000, /* the daemon has us open (only 303 * superdev) */ 304 305 VF_CREATED = 0x100000, /* for vols: freshly created, 306 * more then new */ 307 VF_HOTSPARE = 0x200000, /* for drives: use as hot spare */ 308 VF_RETRYERRORS = 0x400000, /* don't down subdisks on I/O errors */ 309 }; 310 311 /* Global configuration information for the vinum subsystem */ 312 struct _vinum_conf { 313 /* Pointers to vinum structures */ 314 struct drive *drive; 315 struct sd *sd; 316 struct plex *plex; 317 struct volume *volume; 318 319 /* the number allocated */ 320 int drives_allocated; 321 int subdisks_allocated; 322 int plexes_allocated; 323 int volumes_allocated; 324 325 /* and the number currently in use */ 326 int drives_used; 327 int subdisks_used; 328 int plexes_used; 329 int volumes_used; 330 331 int flags; 332 333 #define VINUM_MAXACTIVE 30000 /* max number of active requests */ 334 int active; /* current number of requests outstanding */ 335 int maxactive; /* max number of requests ever outstanding */ 336 #if VINUMDEBUG 337 struct request *lastrq; 338 struct bio *lastbio; 339 #endif 340 int physbufs; 341 }; 342 343 /* Use these defines to simplify code */ 344 #define DRIVE vinum_conf.drive 345 #define SD vinum_conf.sd 346 #define PLEX vinum_conf.plex 347 #define VOL vinum_conf.volume 348 #define VFLAGS vinum_conf.flags 349 350 /* 351 * Slice header 352 * 353 * Vinum drives start with this structure: 354 * 355 *\ Sector 356 * |--------------------------------------| 357 * | PDP-11 memorial boot block | 0 358 * |--------------------------------------| 359 * | Disk label, maybe | 1 360 * |--------------------------------------| 361 * | Slice definition (vinum_hdr) | 8 362 * |--------------------------------------| 363 * | | 364 * | Configuration info, first copy | 9 365 * | | 366 * |--------------------------------------| 367 * | | 368 * | Configuration info, second copy | 9 + size of config 369 * | | 370 * |--------------------------------------| 371 */ 372 373 /* 374 * Sizes and offsets of our information 375 */ 376 enum { 377 VINUM_LABEL_OFFSET = 4096, /* offset of vinum label */ 378 VINUMHEADERLEN = 512, /* size of vinum label */ 379 VINUM_CONFIG_OFFSET = 4608, /* offset of first config copy */ 380 MAXCONFIG = 65536, /* and size of config copy */ 381 382 /* this is where the data starts */ 383 DATASTART = (MAXCONFIG * 2 + VINUM_CONFIG_OFFSET) / DEV_BSIZE 384 }; 385 386 /* 387 * hostname is 256 bytes long, but we don't need to shlep 388 * multiple copies in vinum. We use the host name just 389 * to identify this system, and 32 bytes should be ample 390 * for that purpose 391 */ 392 393 struct vinum_label { 394 char sysname[VINUMHOSTNAMELEN]; /* system name at time of creation */ 395 char name[MAXDRIVENAME]; /* our name of the drive */ 396 struct timeval date_of_birth; /* the time it was created */ 397 struct timeval last_update; /* and the time of last update */ 398 /* 399 * total size in bytes of the drive. This value 400 * includes the headers. 401 */ 402 off_t drive_size; 403 }; 404 405 struct vinum_hdr { 406 uint64_t magic; /* we're long on magic numbers */ 407 408 /* 409 * Size in bytes of each copy of the 410 * configuration info. This must be a multiple 411 * of the sector size. 412 */ 413 int config_length; 414 struct vinum_label label; /* unique label */ 415 }; 416 417 /* should be this */ 418 #define VINUM_MAGIC 22322600044678729LL 419 420 /* becomes this after obliteration */ 421 #define VINUM_NOMAGIC 22322600044678990LL 422 423 /* Information returned from read_drive_label */ 424 enum drive_label_info { 425 DL_CANT_OPEN, /* invalid partition */ 426 DL_NOT_OURS, /* valid part, but no vinum label */ 427 DL_DELETED_LABEL, /* valid part, deleted label found */ 428 DL_WRONG_DRIVE, /* drive name doesn't match */ 429 DL_OURS /* valid partition and label found */ 430 }; 431 432 /*** Drive definitions ***/ 433 /* 434 * A drive corresponds to a disk slice. We use a different term to show 435 * the difference in usage: it doesn't have to be a slice, and could 436 * theoretically be a complete, unpartitioned disk 437 */ 438 439 struct drive { 440 char devicename[MAXDRIVENAME]; /* name of the slice it's on */ 441 enum drivestate state; /* current state */ 442 int flags; /* flags */ 443 int subdisks_allocated; /* number of entries in sd */ 444 int subdisks_used; /* and the number used */ 445 int blocksize; /* size of fs blocks */ 446 int pid; /* of locker */ 447 u_int64_t sectors_available; /* number of sectors still available */ 448 int secsperblock; 449 int lasterror; /* last error on drive */ 450 int driveno; /* index of drive in vinum_conf */ 451 int opencount; /* number of up subdisks */ 452 u_int64_t reads; /* number of reads on this drive */ 453 u_int64_t writes; /* number of writes on this drive */ 454 u_int64_t bytes_read; /* number of bytes read */ 455 u_int64_t bytes_written; /* number of bytes written */ 456 struct vinum_label label; /* and the label information */ 457 #define DRIVE_MAXACTIVE 30000 /* maximum number of active requests */ 458 int active; /* current number of reqs outstanding */ 459 int maxactive; /* max num of reqs ever outstanding */ 460 int freelist_size; /* entries alloced in free list */ 461 int freelist_entries; /* entries used in free list */ 462 struct drive_freelist { /* sorted list of free space on drive */ 463 u_int64_t offset; /* offset of entry */ 464 u_int64_t sectors; /* and length in sectors */ 465 } *freelist; 466 struct partinfo partinfo; /* partition information */ 467 /* XXX kludge until we get this struct cleaned up */ 468 #if _KERNEL 469 struct vnode *vp; 470 struct cdev *dev; 471 #else 472 void *vp_dummy; 473 void *dev_dummy; 474 #endif 475 #ifdef VINUMDEBUG 476 char lockfilename[16]; /* locked with file */ 477 int lockline; /* and the line number */ 478 #endif 479 }; 480 481 /*** Subdisk definitions ***/ 482 483 struct sd { 484 char name[MAXSDNAME]; /* name of subdisk */ 485 enum sdstate state; /* state */ 486 int flags; 487 int lasterror; /* last error occurred */ 488 /* offsets in blocks */ 489 int64_t driveoffset; /* offset on drive */ 490 #ifdef _KERNEL 491 cdev_t sd_dev; 492 #else 493 void *sd_dev_dummy; 494 #endif 495 496 /* 497 * plexoffset is the offset from the beginning 498 * of the plex to the very first part of the 499 * subdisk, in sectors. For striped, RAID-4 and 500 * RAID-5 plexes, only the first stripe is 501 * located at this offset 502 */ 503 int64_t plexoffset; /* offset in plex */ 504 u_int64_t sectors; /* and length in sectors */ 505 int plexno; /* index of plex, if it belongs */ 506 int driveno; /* index of the drive */ 507 int sdno; /* our index in vinum_conf */ 508 int plexsdno; /* and our number in our plex */ 509 /* (undefined if no plex) */ 510 u_int64_t reads; /* number of reads on this subdisk */ 511 u_int64_t writes; /* number of writes on this subdisk */ 512 u_int64_t bytes_read; /* number of bytes read */ 513 u_int64_t bytes_written; /* number of bytes written */ 514 /* revive parameters */ 515 u_int64_t revived; /* blkno of current revive request */ 516 int revive_blocksize; /* revive block size (bytes) */ 517 int revive_interval; /* and time to wait between transfers */ 518 pid_t reviver; /* PID of reviving process */ 519 /* init parameters */ 520 u_int64_t initialized; /* blkno of current init request */ 521 int init_blocksize; /* init block size (bytes) */ 522 int init_interval; /* time to wait between transfers */ 523 struct request *waitlist; /* list of reqs waiting on revive op */ 524 }; 525 526 /*** Plex definitions ***/ 527 528 /* kinds of plex organization */ 529 enum plexorg { 530 plex_disorg, /* disorganized */ 531 plex_concat, /* concatenated plex */ 532 plex_striped, /* striped plex */ 533 plex_raid4, /* RAID4 plex */ 534 plex_raid5 /* RAID5 plex */ 535 }; 536 537 /* Recognize plex organizations */ 538 /* RAID 1, 4 or 5 */ 539 #define isstriped(p) (p->organization >= plex_striped) 540 541 /* RAID 4 or 5 */ 542 #define isparity(p) (p->organization >= plex_raid4) 543 544 struct plex { 545 char name[MAXPLEXNAME]; /* name of plex */ 546 enum plexorg organization; /* Plex organization */ 547 enum plexstate state; /* and current state */ 548 #ifdef _KERNEL 549 cdev_t plex_dev; 550 #else 551 void *plex_dev_dummy; 552 #endif 553 u_int64_t length; /* total length of plex (sectors) */ 554 int flags; 555 int stripesize; /* size of stripe or raid band, 556 * in sectors */ 557 int subdisks; /* number of associated subdisks */ 558 int subdisks_allocated; /* number of subdisks allocated 559 * space for */ 560 int *sdnos; /* list of component subdisks */ 561 int plexno; /* index of plex in vinum_conf */ 562 int volno; /* index of volume */ 563 int volplexno; /* number of plex in volume */ 564 /* Statistics */ 565 u_int64_t reads; /* number of reads on this plex */ 566 u_int64_t writes; /* number of writes on this plex */ 567 u_int64_t bytes_read; /* number of bytes read */ 568 u_int64_t bytes_written; /* number of bytes written */ 569 u_int64_t recovered_reads; /* number of recovered read 570 * operations */ 571 u_int64_t degraded_writes; /* number of degraded writes */ 572 u_int64_t parityless_writes; /* number of parityless writes */ 573 u_int64_t multiblock; /* requests that needed more than 574 * one block */ 575 u_int64_t multistripe; /* requests that needed more than 576 * one stripe */ 577 int sddowncount; /* number of subdisks down */ 578 579 /* Lock information */ 580 int usedlocks; /* number currently in use */ 581 int lockwaits; /* and number of waits for locks */ 582 off_t checkblock; /* block number for parity op */ 583 struct rangelock *lock; /* ranges of locked addresses */ 584 }; 585 586 /*** Volume definitions ***/ 587 588 /* Address range definitions, for locking volumes */ 589 struct rangelock { 590 vinum_off_t stripe; /* address + 1 of the range being locked */ 591 struct buf *bp; /* user's buffer pointer */ 592 }; 593 594 struct volume { 595 char name[MAXVOLNAME]; /* name of volume */ 596 enum volumestate state; /* current state */ 597 int plexes; /* number of plexes */ 598 int preferred_plex; /* plex to read from, -1 for 599 * round-robin */ 600 #ifdef _KERNEL 601 cdev_t vol_dev; 602 #else 603 void *vol_dev_dummy; 604 #endif 605 606 /* 607 * index of plex used for last read, for 608 * round-robin. 609 */ 610 int last_plex_read; 611 int volno; /* volume number */ 612 int flags; /* status and configuration flags */ 613 int openflags; /* flags supplied to last open(2) */ 614 u_int64_t size; /* size of volume */ 615 int blocksize; /* logical block size */ 616 int active; /* number of outstanding 617 * requests active */ 618 int subops; /* and the number of suboperations */ 619 /* Statistics */ 620 u_int64_t bytes_read; /* number of bytes read */ 621 u_int64_t bytes_written; /* number of bytes written */ 622 u_int64_t reads; /* number of reads on this volume */ 623 u_int64_t writes; /* number of writes on this volume */ 624 u_int64_t recovered_reads; /* reads recovered from another plex */ 625 626 /* 627 * Unlike subdisks in the plex, space for the 628 * plex pointers is static. 629 */ 630 int plex[MAXPLEX]; /* index of plexes */ 631 }; 632 633 /* 634 * Table expansion. Expand table, which contains oldcount 635 * entries of type element, by increment entries, and change 636 * oldcount accordingly 637 */ 638 #define EXPAND(table, element, oldcount, increment) \ 639 { \ 640 expand_table((void **) &table, \ 641 oldcount * sizeof (element), \ 642 (oldcount + increment) * sizeof (element)); \ 643 oldcount += increment; \ 644 } 645 646 /* 647 * Information on vinum's memory usage 648 */ 649 struct meminfo { 650 int mallocs; /* number of malloced blocks */ 651 int total_malloced; /* total amount malloced */ 652 int highwater; /* maximum number of mallocs */ 653 struct mc *malloced; /* pointer to kernel table */ 654 }; 655 656 #define MCFILENAMELEN 16 657 struct mc { 658 struct timeval time; 659 int seq; 660 int size; 661 short line; 662 caddr_t address; 663 char file[MCFILENAMELEN]; 664 }; 665 666 /* 667 * These enums are used by the state transition 668 * routines. They're in bit map format: 669 * 670 * Bit 0: Other plexes in the volume are down 671 * Bit 1: Other plexes in the volume are up 672 * Bit 2: The current plex is up 673 * Maybe they should be local to 674 * state.c 675 */ 676 enum volplexstate { 677 volplex_onlyusdown = 0, /* 0: we're the only plex, 678 * and we're down */ 679 volplex_alldown, /* 1: another plex is down, 680 * and so are we */ 681 volplex_otherup, /* 2: another plex is up */ 682 volplex_otherupdown, /* 3: other plexes are up and down */ 683 volplex_onlyus, /* 4: we're up and alone */ 684 volplex_onlyusup, /* 5: only we are up, others are down */ 685 volplex_allup, /* 6: all plexes are up */ 686 volplex_someup /* 7: some plexes are up, 687 * including us */ 688 }; 689 690 /* state map for plex */ 691 enum sdstates { 692 sd_emptystate = 1, 693 sd_downstate = 2, /* SD is down */ 694 sd_crashedstate = 4, /* SD is crashed */ 695 sd_obsoletestate = 8, /* SD is obsolete */ 696 sd_stalestate = 16, /* SD is stale */ 697 sd_rebornstate = 32, /* SD is reborn */ 698 sd_upstate = 64, /* SD is up */ 699 sd_initstate = 128, /* SD is initializing */ 700 sd_initializedstate = 256, /* SD is initialized */ 701 sd_otherstate = 512, /* SD is in some other state */ 702 }; 703 704 /* 705 * This is really just a parameter to pass to 706 * set_<foo>_state, but since it needs to be known 707 * in the external definitions, we need to define 708 * it here 709 */ 710 enum setstateflags { 711 setstate_none = 0, /* no flags */ 712 setstate_force = 1, /* force the state change */ 713 setstate_configuring = 2, /* we're currently configuring, 714 don't save */ 715 }; 716 717 /* Operations for parityops to perform. */ 718 enum parityop { 719 checkparity, 720 rebuildparity, 721 rebuildandcheckparity, /* rebuildparity with the -v option */ 722 }; 723 724 #ifdef VINUMDEBUG 725 726 /* 727 * Debugging stuff 728 */ 729 enum debugflags { 730 DEBUG_ADDRESSES = 1, /* show buffer information during 731 * requests */ 732 DEBUG_NUMOUTPUT = 2, /* show the value of vp->v_numoutput */ 733 DEBUG_RESID = 4, /* go into debugger in complete_rqe */ 734 DEBUG_LASTREQS = 8, /* keep a circular buffer of 735 * last requests */ 736 DEBUG_REVIVECONFLICT = 16, /* print info about revive conflicts */ 737 DEBUG_EOFINFO = 32, /* print info about EOF detection */ 738 DEBUG_MEMFREE = 64, /* keep info about Frees */ 739 DEBUG_BIGDRIVE = 128, /* pretend our drives are 100 times 740 * the size */ 741 DEBUG_REMOTEGDB = 256, /* go into remote gdb */ 742 DEBUG_WARNINGS = 512, /* log various relatively 743 * harmless warnings */ 744 }; 745 746 #ifdef _KERNEL 747 #ifdef __i386__ 748 #define longjmp LongJmp /* test our longjmps */ 749 #endif 750 #endif 751 #endif 752