| 1 | /*- |
| 2 | * Copyright (c) 1997, 1998 |
| 3 | * Nan Yang Computer Services Limited. All rights reserved. |
| 4 | * |
| 5 | * Written by Greg Lehey |
| 6 | * |
| 7 | * This software is distributed under the so-called ``Berkeley |
| 8 | * License'': |
| 9 | * |
| 10 | * Redistribution and use in source and binary forms, with or without |
| 11 | * modification, are permitted provided that the following conditions |
| 12 | * are met: |
| 13 | * 1. Redistributions of source code must retain the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer. |
| 15 | * 2. Redistributions in binary form must reproduce the above copyright |
| 16 | * notice, this list of conditions and the following disclaimer in the |
| 17 | * documentation and/or other materials provided with the distribution. |
| 18 | * 3. All advertising materials mentioning features or use of this software |
| 19 | * must display the following acknowledgement: |
| 20 | * This product includes software developed by Nan Yang Computer |
| 21 | * Services Limited. |
| 22 | * 4. Neither the name of the Company nor the names of its contributors |
| 23 | * may be used to endorse or promote products derived from this software |
| 24 | * without specific prior written permission. |
| 25 | * |
| 26 | * This software is provided ``as is'', and any express or implied |
| 27 | * warranties, including, but not limited to, the implied warranties of |
| 28 | * merchantability and fitness for a particular purpose are disclaimed. |
| 29 | * In no event shall the company or contributors be liable for any |
| 30 | * direct, indirect, incidental, special, exemplary, or consequential |
| 31 | * damages (including, but not limited to, procurement of substitute |
| 32 | * goods or services; loss of use, data, or profits; or business |
| 33 | * interruption) however caused and on any theory of liability, whether |
| 34 | * in contract, strict liability, or tort (including negligence or |
| 35 | * otherwise) arising in any way out of the use of this software, even if |
| 36 | * advised of the possibility of such damage. |
| 37 | * |
| 38 | * $Id: vinum.c,v 1.33 2001/01/09 06:19:15 grog Exp grog $ |
| 39 | * $FreeBSD: src/sys/dev/vinum/vinum.c,v 1.38.2.3 2003/01/07 12:14:16 joerg Exp $ |
| 40 | * $DragonFly: src/sys/dev/raid/vinum/vinum.c,v 1.20 2007/05/15 22:44:12 dillon Exp $ |
| 41 | */ |
| 42 | |
| 43 | #define STATIC static /* nothing while we're testing XXX */ |
| 44 | |
| 45 | #include "vinumhdr.h" |
| 46 | #include <sys/sysproto.h> /* for sync(2) */ |
| 47 | #include <sys/devicestat.h> |
| 48 | #include <sys/poll.h> /* XXX: poll ops used in kq filters */ |
| 49 | #include <sys/event.h> |
| 50 | #include <sys/udev.h> |
| 51 | #ifdef VINUMDEBUG |
| 52 | #include <sys/reboot.h> |
| 53 | int debug = 0; |
| 54 | extern int total_malloced; |
| 55 | extern int malloccount; |
| 56 | extern struct mc malloced[]; |
| 57 | #endif |
| 58 | #include "request.h" |
| 59 | |
| 60 | struct dev_ops vinum_ops = |
| 61 | { |
| 62 | { "vinum", VINUM_CDEV_MAJOR, D_DISK }, |
| 63 | .d_open = vinumopen, |
| 64 | .d_close = vinumclose, |
| 65 | .d_read = physread, |
| 66 | .d_write = physwrite, |
| 67 | .d_ioctl = vinumioctl, |
| 68 | .d_kqfilter = vinumkqfilter, |
| 69 | .d_strategy = vinumstrategy, |
| 70 | .d_dump = vinumdump, |
| 71 | .d_psize = vinumsize, |
| 72 | }; |
| 73 | |
| 74 | /* Called by main() during pseudo-device attachment. */ |
| 75 | STATIC void vinumattach(void *); |
| 76 | |
| 77 | STATIC int vinum_modevent(module_t mod, modeventtype_t type, void *unused); |
| 78 | STATIC void vinum_initconf(void); |
| 79 | |
| 80 | struct _vinum_conf vinum_conf; /* configuration information */ |
| 81 | cdev_t vinum_super_dev; |
| 82 | cdev_t vinum_wsuper_dev; |
| 83 | cdev_t vinum_daemon_dev; |
| 84 | |
| 85 | /* |
| 86 | * Called by main() during pseudo-device attachment. All we need |
| 87 | * to do is allocate enough space for devices to be configured later, and |
| 88 | * add devsw entries. |
| 89 | */ |
| 90 | void |
| 91 | vinumattach(void *dummy) |
| 92 | { |
| 93 | char *cp, *cp1, *cp2, **drives; |
| 94 | int i, rv; |
| 95 | struct volume *vol; |
| 96 | |
| 97 | /* modload should prevent multiple loads, so this is worth a panic */ |
| 98 | if ((vinum_conf.flags & VF_LOADED) != 0) |
| 99 | panic("vinum: already loaded"); |
| 100 | |
| 101 | log(LOG_INFO, "vinum: loaded\n"); |
| 102 | vinum_conf.flags |= VF_LOADED; /* we're loaded now */ |
| 103 | |
| 104 | daemonq = NULL; /* initialize daemon's work queue */ |
| 105 | dqend = NULL; |
| 106 | |
| 107 | #if 0 |
| 108 | dev_ops_add(&vinum_ops, 0, 0); |
| 109 | #endif |
| 110 | |
| 111 | vinum_initconf(); |
| 112 | |
| 113 | /* |
| 114 | * Create superdev, wrongsuperdev, and controld devices. |
| 115 | */ |
| 116 | vinum_super_dev = make_dev(&vinum_ops, VINUM_SUPERDEV, |
| 117 | UID_ROOT, GID_WHEEL, 0600, |
| 118 | VINUM_SUPERDEV_BASE); |
| 119 | vinum_wsuper_dev = make_dev(&vinum_ops, VINUM_WRONGSUPERDEV, |
| 120 | UID_ROOT, GID_WHEEL, 0600, |
| 121 | VINUM_WRONGSUPERDEV_BASE); |
| 122 | vinum_daemon_dev = make_dev(&vinum_ops, VINUM_DAEMON_DEV, |
| 123 | UID_ROOT, GID_WHEEL, 0600, |
| 124 | VINUM_DAEMON_DEV_BASE); |
| 125 | |
| 126 | /* |
| 127 | * See if the loader has passed us a disk to |
| 128 | * read the initial configuration from. |
| 129 | */ |
| 130 | if ((cp = kgetenv("vinum.drives")) != NULL) { |
| 131 | for (cp1 = cp, i = 0, drives = 0; *cp1 != '\0'; i++) { |
| 132 | cp2 = cp1; |
| 133 | while (*cp1 != '\0' && *cp1 != ',' && *cp1 != ' ') |
| 134 | cp1++; |
| 135 | if (*cp1 != '\0') |
| 136 | *cp1++ = '\0'; |
| 137 | drives = krealloc(drives, (unsigned long)((i + 1) * sizeof(char *)), |
| 138 | M_TEMP, M_WAITOK); |
| 139 | drives[i] = cp2; |
| 140 | } |
| 141 | if (i == 0) |
| 142 | goto bailout; |
| 143 | rv = vinum_scandisk(drives, i); |
| 144 | if (rv) |
| 145 | log(LOG_NOTICE, "vinum_scandisk() returned %d", rv); |
| 146 | bailout: |
| 147 | kfree(drives, M_TEMP); |
| 148 | } |
| 149 | if ((cp = kgetenv("vinum.root")) != NULL) { |
| 150 | for (i = 0; i < vinum_conf.volumes_used; i++) { |
| 151 | vol = &vinum_conf.volume[i]; |
| 152 | if ((vol->state == volume_up) |
| 153 | && (strcmp (vol->name, cp) == 0) |
| 154 | ) { |
| 155 | rootdev = make_dev(&vinum_ops, i, UID_ROOT, GID_OPERATOR, |
| 156 | 0640, VINUM_BASE "vinumroot"); |
| 157 | udev_dict_set_cstr(rootdev, "subsystem", "raid"); |
| 158 | udev_dict_set_cstr(rootdev, "disk-type", "raid"); |
| 159 | log(LOG_INFO, "vinum: using volume %s for root device\n", cp); |
| 160 | break; |
| 161 | } |
| 162 | } |
| 163 | } |
| 164 | } |
| 165 | |
| 166 | /* |
| 167 | * Check if we have anything open. If confopen is != 0, |
| 168 | * that goes for the super device as well, otherwise |
| 169 | * only for volumes. |
| 170 | * |
| 171 | * Return 0 if not inactive, 1 if inactive. |
| 172 | */ |
| 173 | int |
| 174 | vinum_inactive(int confopen) |
| 175 | { |
| 176 | int i; |
| 177 | int can_do = 1; /* assume we can do it */ |
| 178 | |
| 179 | if (confopen && (vinum_conf.flags & VF_OPEN)) /* open by vinum(8)? */ |
| 180 | return 0; /* can't do it while we're open */ |
| 181 | lock_config(); |
| 182 | for (i = 0; i < vinum_conf.volumes_allocated; i++) { |
| 183 | if ((VOL[i].state > volume_down) |
| 184 | && (VOL[i].flags & VF_OPEN)) { /* volume is open */ |
| 185 | can_do = 0; |
| 186 | break; |
| 187 | } |
| 188 | } |
| 189 | unlock_config(); |
| 190 | return can_do; |
| 191 | } |
| 192 | |
| 193 | /* |
| 194 | * Free all structures. |
| 195 | * If cleardrive is 0, save the configuration; otherwise |
| 196 | * remove the configuration from the drive. |
| 197 | * |
| 198 | * Before coming here, ensure that no volumes are open. |
| 199 | */ |
| 200 | void |
| 201 | free_vinum(int cleardrive) |
| 202 | { |
| 203 | int i; |
| 204 | int drives_allocated = vinum_conf.drives_allocated; |
| 205 | |
| 206 | if (DRIVE != NULL) { |
| 207 | if (cleardrive) { /* remove the vinum config */ |
| 208 | for (i = 0; i < drives_allocated; i++) |
| 209 | remove_drive(i); /* remove the drive */ |
| 210 | } else { /* keep the config */ |
| 211 | for (i = 0; i < drives_allocated; i++) |
| 212 | free_drive(&DRIVE[i]); /* close files and things */ |
| 213 | } |
| 214 | Free(DRIVE); |
| 215 | } |
| 216 | while ((vinum_conf.flags & (VF_STOPPING | VF_DAEMONOPEN)) |
| 217 | == (VF_STOPPING | VF_DAEMONOPEN)) { /* at least one daemon open, we're stopping */ |
| 218 | queue_daemon_request(daemonrq_return, (union daemoninfo) 0); /* stop the daemon */ |
| 219 | tsleep(&vinumclose, 0, "vstop", 1); /* and wait for it */ |
| 220 | } |
| 221 | if (SD != NULL) { |
| 222 | for (i = 0; i < vinum_conf.subdisks_allocated; i++) { |
| 223 | struct sd *sd = &vinum_conf.sd[i]; |
| 224 | if (sd->sd_dev) { |
| 225 | destroy_dev(sd->sd_dev); |
| 226 | sd->sd_dev = NULL; |
| 227 | } |
| 228 | } |
| 229 | Free(SD); |
| 230 | } |
| 231 | if (PLEX != NULL) { |
| 232 | for (i = 0; i < vinum_conf.plexes_allocated; i++) { |
| 233 | struct plex *plex = &vinum_conf.plex[i]; |
| 234 | |
| 235 | if (plex->plex_dev) { |
| 236 | destroy_dev(plex->plex_dev); |
| 237 | plex->plex_dev = NULL; |
| 238 | } |
| 239 | |
| 240 | if (plex->state != plex_unallocated) { /* we have real data there */ |
| 241 | if (plex->sdnos) |
| 242 | Free(plex->sdnos); |
| 243 | } |
| 244 | } |
| 245 | Free(PLEX); |
| 246 | } |
| 247 | if (VOL != NULL) { |
| 248 | for (i = 0; i < vinum_conf.volumes_allocated; i++) { |
| 249 | struct volume *vol = &vinum_conf.volume[i]; |
| 250 | |
| 251 | if (vol->vol_dev) { |
| 252 | destroy_dev(vol->vol_dev); |
| 253 | vol->vol_dev = NULL; |
| 254 | } |
| 255 | } |
| 256 | Free(VOL); |
| 257 | } |
| 258 | bzero(&vinum_conf, sizeof(vinum_conf)); |
| 259 | vinum_initconf(); |
| 260 | } |
| 261 | |
| 262 | STATIC void |
| 263 | vinum_initconf(void) |
| 264 | { |
| 265 | vinum_conf.physbufs = nswbuf / 2 + 1; |
| 266 | |
| 267 | /* allocate space: drives... */ |
| 268 | DRIVE = (struct drive *) Malloc(sizeof(struct drive) * INITIAL_DRIVES); |
| 269 | CHECKALLOC(DRIVE, "vinum: no memory\n"); |
| 270 | bzero(DRIVE, sizeof(struct drive) * INITIAL_DRIVES); |
| 271 | vinum_conf.drives_allocated = INITIAL_DRIVES; |
| 272 | vinum_conf.drives_used = 0; |
| 273 | |
| 274 | /* volumes, ... */ |
| 275 | VOL = (struct volume *) Malloc(sizeof(struct volume) * INITIAL_VOLUMES); |
| 276 | CHECKALLOC(VOL, "vinum: no memory\n"); |
| 277 | bzero(VOL, sizeof(struct volume) * INITIAL_VOLUMES); |
| 278 | vinum_conf.volumes_allocated = INITIAL_VOLUMES; |
| 279 | vinum_conf.volumes_used = 0; |
| 280 | |
| 281 | /* plexes, ... */ |
| 282 | PLEX = (struct plex *) Malloc(sizeof(struct plex) * INITIAL_PLEXES); |
| 283 | CHECKALLOC(PLEX, "vinum: no memory\n"); |
| 284 | bzero(PLEX, sizeof(struct plex) * INITIAL_PLEXES); |
| 285 | vinum_conf.plexes_allocated = INITIAL_PLEXES; |
| 286 | vinum_conf.plexes_used = 0; |
| 287 | |
| 288 | /* and subdisks */ |
| 289 | SD = (struct sd *) Malloc(sizeof(struct sd) * INITIAL_SUBDISKS); |
| 290 | CHECKALLOC(SD, "vinum: no memory\n"); |
| 291 | bzero(SD, sizeof(struct sd) * INITIAL_SUBDISKS); |
| 292 | vinum_conf.subdisks_allocated = INITIAL_SUBDISKS; |
| 293 | vinum_conf.subdisks_used = 0; |
| 294 | } |
| 295 | |
| 296 | STATIC int |
| 297 | vinum_modevent(module_t mod, modeventtype_t type, void *unused) |
| 298 | { |
| 299 | switch (type) { |
| 300 | case MOD_LOAD: |
| 301 | vinumattach(NULL); |
| 302 | return 0; /* OK */ |
| 303 | case MOD_UNLOAD: |
| 304 | if (!vinum_inactive(1)) /* is anything open? */ |
| 305 | return EBUSY; /* yes, we can't do it */ |
| 306 | vinum_conf.flags |= VF_STOPPING; /* note that we want to stop */ |
| 307 | sys_sync(NULL); /* write out buffers */ |
| 308 | free_vinum(0); /* clean up */ |
| 309 | |
| 310 | if (vinum_super_dev) { |
| 311 | destroy_dev(vinum_super_dev); |
| 312 | vinum_super_dev = NULL; |
| 313 | } |
| 314 | if (vinum_wsuper_dev) { |
| 315 | destroy_dev(vinum_wsuper_dev); |
| 316 | vinum_wsuper_dev = NULL; |
| 317 | } |
| 318 | if (vinum_daemon_dev) { |
| 319 | destroy_dev(vinum_daemon_dev); |
| 320 | vinum_daemon_dev = NULL; |
| 321 | } |
| 322 | |
| 323 | sync_devs(); |
| 324 | #ifdef VINUMDEBUG |
| 325 | if (total_malloced) { |
| 326 | int i; |
| 327 | #ifdef INVARIANTS |
| 328 | int *poke; |
| 329 | #endif |
| 330 | |
| 331 | for (i = 0; i < malloccount; i++) { |
| 332 | if (debug & DEBUG_WARNINGS) /* want to hear about them */ |
| 333 | log(LOG_WARNING, |
| 334 | "vinum: exiting with %d bytes malloced from %s:%d\n", |
| 335 | malloced[i].size, |
| 336 | malloced[i].file, |
| 337 | malloced[i].line); |
| 338 | #ifdef INVARIANTS |
| 339 | poke = &((int *) malloced[i].address) |
| 340 | [malloced[i].size / (2 * sizeof(int))]; /* middle of the area */ |
| 341 | if (*poke == 0xdeadc0de) /* already freed */ |
| 342 | log(LOG_ERR, |
| 343 | "vinum: exiting with malloc table inconsistency at %p from %s:%d\n", |
| 344 | malloced[i].address, |
| 345 | malloced[i].file, |
| 346 | malloced[i].line); |
| 347 | #endif |
| 348 | Free(malloced[i].address); |
| 349 | } |
| 350 | } |
| 351 | #endif |
| 352 | dev_ops_remove_all(&vinum_ops); |
| 353 | log(LOG_INFO, "vinum: unloaded\n"); /* tell the world */ |
| 354 | return 0; |
| 355 | default: |
| 356 | break; |
| 357 | } |
| 358 | return 0; |
| 359 | } |
| 360 | |
| 361 | moduledata_t vinum_mod = |
| 362 | { |
| 363 | "vinum", |
| 364 | (modeventhand_t) vinum_modevent, |
| 365 | 0 |
| 366 | }; |
| 367 | DECLARE_MODULE(vinum, vinum_mod, SI_SUB_RAID, SI_ORDER_MIDDLE); |
| 368 | |
| 369 | /* ARGSUSED */ |
| 370 | /* Open a vinum object */ |
| 371 | int |
| 372 | vinumopen(struct dev_open_args *ap) |
| 373 | { |
| 374 | cdev_t dev = ap->a_head.a_dev; |
| 375 | int error; |
| 376 | unsigned int index; |
| 377 | struct volume *vol; |
| 378 | struct plex *plex; |
| 379 | struct sd *sd; |
| 380 | int devminor; /* minor number */ |
| 381 | |
| 382 | devminor = minor(dev); |
| 383 | error = 0; |
| 384 | /* First, decide what we're looking at */ |
| 385 | switch (DEVTYPE(dev)) { |
| 386 | case VINUM_VOLUME_TYPE: |
| 387 | index = Volno(dev); |
| 388 | if (index >= vinum_conf.volumes_allocated) |
| 389 | return ENXIO; /* no such device */ |
| 390 | vol = &VOL[index]; |
| 391 | |
| 392 | switch (vol->state) { |
| 393 | case volume_unallocated: |
| 394 | case volume_uninit: |
| 395 | return ENXIO; |
| 396 | |
| 397 | case volume_up: |
| 398 | vol->flags |= VF_OPEN; /* note we're open */ |
| 399 | return 0; |
| 400 | |
| 401 | case volume_down: |
| 402 | return EIO; |
| 403 | |
| 404 | default: |
| 405 | return EINVAL; |
| 406 | } |
| 407 | |
| 408 | case VINUM_PLEX_TYPE: |
| 409 | if (Volno(dev) >= vinum_conf.volumes_allocated) |
| 410 | return ENXIO; |
| 411 | /* FALLTHROUGH */ |
| 412 | |
| 413 | case VINUM_RAWPLEX_TYPE: |
| 414 | index = Plexno(dev); /* get plex index in vinum_conf */ |
| 415 | if (index >= vinum_conf.plexes_allocated) |
| 416 | return ENXIO; /* no such device */ |
| 417 | plex = &PLEX[index]; |
| 418 | |
| 419 | switch (plex->state) { |
| 420 | case plex_referenced: |
| 421 | case plex_unallocated: |
| 422 | return EINVAL; |
| 423 | |
| 424 | default: |
| 425 | plex->flags |= VF_OPEN; /* note we're open */ |
| 426 | return 0; |
| 427 | } |
| 428 | |
| 429 | case VINUM_SD_TYPE: |
| 430 | if ((Volno(dev) >= vinum_conf.volumes_allocated) /* no such volume */ |
| 431 | ||(Plexno(dev) >= vinum_conf.plexes_allocated)) /* or no such plex */ |
| 432 | return ENXIO; /* no such device */ |
| 433 | |
| 434 | /* FALLTHROUGH */ |
| 435 | |
| 436 | case VINUM_RAWSD_TYPE: |
| 437 | index = Sdno(dev); /* get the subdisk number */ |
| 438 | if ((index >= vinum_conf.subdisks_allocated) /* not a valid SD entry */ |
| 439 | ||(SD[index].state < sd_init)) /* or SD is not real */ |
| 440 | return ENXIO; /* no such device */ |
| 441 | sd = &SD[index]; |
| 442 | |
| 443 | /* |
| 444 | * Opening a subdisk is always a special operation, so we |
| 445 | * ignore the state as long as it represents a real subdisk |
| 446 | */ |
| 447 | switch (sd->state) { |
| 448 | case sd_unallocated: |
| 449 | case sd_uninit: |
| 450 | return EINVAL; |
| 451 | |
| 452 | default: |
| 453 | sd->flags |= VF_OPEN; /* note we're open */ |
| 454 | return 0; |
| 455 | } |
| 456 | |
| 457 | case VINUM_SUPERDEV_TYPE: |
| 458 | error = priv_check_cred(ap->a_cred, PRIV_ROOT, 0); /* are we root? */ |
| 459 | if (error == 0) { /* yes, can do */ |
| 460 | if (devminor == VINUM_DAEMON_DEV) /* daemon device */ |
| 461 | vinum_conf.flags |= VF_DAEMONOPEN; /* we're open */ |
| 462 | else if (devminor == VINUM_SUPERDEV) |
| 463 | vinum_conf.flags |= VF_OPEN; /* we're open */ |
| 464 | else |
| 465 | error = ENODEV; /* nothing, maybe a debug mismatch */ |
| 466 | } |
| 467 | return error; |
| 468 | |
| 469 | /* Vinum drives are disks. We already have a disk |
| 470 | * driver, so don't handle them here */ |
| 471 | case VINUM_DRIVE_TYPE: |
| 472 | default: |
| 473 | return ENODEV; /* don't know what to do with these */ |
| 474 | } |
| 475 | } |
| 476 | |
| 477 | /* ARGSUSED */ |
| 478 | int |
| 479 | vinumclose(struct dev_close_args *ap) |
| 480 | { |
| 481 | cdev_t dev = ap->a_head.a_dev; |
| 482 | unsigned int index; |
| 483 | struct volume *vol; |
| 484 | int devminor; |
| 485 | |
| 486 | devminor = minor(dev); |
| 487 | index = Volno(dev); |
| 488 | /* First, decide what we're looking at */ |
| 489 | switch (DEVTYPE(dev)) { |
| 490 | case VINUM_VOLUME_TYPE: |
| 491 | if (index >= vinum_conf.volumes_allocated) |
| 492 | return ENXIO; /* no such device */ |
| 493 | vol = &VOL[index]; |
| 494 | |
| 495 | switch (vol->state) { |
| 496 | case volume_unallocated: |
| 497 | case volume_uninit: |
| 498 | return ENXIO; |
| 499 | |
| 500 | case volume_up: |
| 501 | vol->flags &= ~VF_OPEN; /* reset our flags */ |
| 502 | return 0; |
| 503 | |
| 504 | case volume_down: |
| 505 | return EIO; |
| 506 | |
| 507 | default: |
| 508 | return EINVAL; |
| 509 | } |
| 510 | |
| 511 | case VINUM_PLEX_TYPE: |
| 512 | if (Volno(dev) >= vinum_conf.volumes_allocated) |
| 513 | return ENXIO; |
| 514 | /* FALLTHROUGH */ |
| 515 | |
| 516 | case VINUM_RAWPLEX_TYPE: |
| 517 | index = Plexno(dev); /* get plex index in vinum_conf */ |
| 518 | if (index >= vinum_conf.plexes_allocated) |
| 519 | return ENXIO; /* no such device */ |
| 520 | PLEX[index].flags &= ~VF_OPEN; /* reset our flags */ |
| 521 | return 0; |
| 522 | |
| 523 | case VINUM_SD_TYPE: |
| 524 | if ((Volno(dev) >= vinum_conf.volumes_allocated) || /* no such volume */ |
| 525 | (Plexno(dev) >= vinum_conf.plexes_allocated)) /* or no such plex */ |
| 526 | return ENXIO; /* no such device */ |
| 527 | /* FALLTHROUGH */ |
| 528 | |
| 529 | case VINUM_RAWSD_TYPE: |
| 530 | index = Sdno(dev); /* get the subdisk number */ |
| 531 | if (index >= vinum_conf.subdisks_allocated) |
| 532 | return ENXIO; /* no such device */ |
| 533 | SD[index].flags &= ~VF_OPEN; /* reset our flags */ |
| 534 | return 0; |
| 535 | |
| 536 | case VINUM_SUPERDEV_TYPE: |
| 537 | /* |
| 538 | * don't worry about whether we're root: |
| 539 | * nobody else would get this far. |
| 540 | */ |
| 541 | if (devminor == VINUM_SUPERDEV) /* normal superdev */ |
| 542 | vinum_conf.flags &= ~VF_OPEN; /* no longer open */ |
| 543 | else if (devminor == VINUM_DAEMON_DEV) { /* the daemon device */ |
| 544 | vinum_conf.flags &= ~VF_DAEMONOPEN; /* no longer open */ |
| 545 | if (vinum_conf.flags & VF_STOPPING) /* we're stopping, */ |
| 546 | wakeup(&vinumclose); /* we can continue stopping now */ |
| 547 | } |
| 548 | return 0; |
| 549 | |
| 550 | case VINUM_DRIVE_TYPE: |
| 551 | default: |
| 552 | return ENODEV; /* don't know what to do with these */ |
| 553 | } |
| 554 | } |
| 555 | |
| 556 | /* size routine */ |
| 557 | int |
| 558 | vinumsize(struct dev_psize_args *ap) |
| 559 | { |
| 560 | cdev_t dev = ap->a_head.a_dev; |
| 561 | struct volume *vol; |
| 562 | |
| 563 | vol = &VOL[Volno(dev)]; |
| 564 | |
| 565 | if (vol->state == volume_up) { |
| 566 | ap->a_result = (int64_t)vol->size; |
| 567 | return(0); |
| 568 | } else { |
| 569 | return(ENXIO); |
| 570 | } |
| 571 | } |
| 572 | |
| 573 | int |
| 574 | vinumdump(struct dev_dump_args *ap) |
| 575 | { |
| 576 | /* Not implemented. */ |
| 577 | return ENXIO; |
| 578 | } |
| 579 | |
| 580 | void |
| 581 | vinumfilt_detach(struct knote *kn) {} |
| 582 | |
| 583 | int |
| 584 | vinumfilt_rd(struct knote *kn, long hint) |
| 585 | { |
| 586 | cdev_t dev = (cdev_t)kn->kn_hook; |
| 587 | |
| 588 | if (seltrue(dev, POLLIN | POLLRDNORM)) |
| 589 | return (1); |
| 590 | |
| 591 | return (0); |
| 592 | } |
| 593 | |
| 594 | int |
| 595 | vinumfilt_wr(struct knote *kn, long hint) |
| 596 | { |
| 597 | /* Writing is always OK */ |
| 598 | return (1); |
| 599 | } |
| 600 | |
| 601 | struct filterops vinumfiltops_rd = |
| 602 | { FILTEROP_ISFD, NULL, vinumfilt_detach, vinumfilt_rd }; |
| 603 | struct filterops vinumfiltops_wr = |
| 604 | { FILTEROP_ISFD, NULL, vinumfilt_detach, vinumfilt_wr }; |
| 605 | |
| 606 | int |
| 607 | vinumkqfilter(struct dev_kqfilter_args *ap) |
| 608 | { |
| 609 | if (ap->a_kn->kn_filter == EVFILT_READ) { |
| 610 | ap->a_kn->kn_fop = &vinumfiltops_rd; |
| 611 | ap->a_kn->kn_hook = (caddr_t)ap->a_head.a_dev; |
| 612 | ap->a_result = 0; |
| 613 | } else if (ap->a_kn->kn_filter == EVFILT_WRITE) { |
| 614 | ap->a_kn->kn_fop = &vinumfiltops_wr; |
| 615 | ap->a_result = 0; |
| 616 | } else { |
| 617 | ap->a_result = EOPNOTSUPP; |
| 618 | } |
| 619 | |
| 620 | return (0); |
| 621 | } |
| 622 | |
| 623 | /* Local Variables: */ |
| 624 | /* fill-column: 50 */ |
| 625 | /* End: */ |