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