DEVFS - remove dev_ops_add(), dev_ops_get(), and get_dev()
[dragonfly.git] / sys / dev / raid / vinum / vinum.c
CommitLineData
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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 $
e0fc5693 40 * $DragonFly: src/sys/dev/raid/vinum/vinum.c,v 1.20 2007/05/15 22:44:12 dillon Exp $
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41 */
42
43#define STATIC static /* nothing while we're testing XXX */
44
1f2de5d4 45#include "vinumhdr.h"
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46#include <sys/sysproto.h> /* for sync(2) */
47#include <sys/devicestat.h>
48#ifdef VINUMDEBUG
49#include <sys/reboot.h>
50int debug = 0;
51extern int total_malloced;
52extern int malloccount;
53extern struct mc malloced[];
54#endif
1f2de5d4 55#include "request.h"
984263bc 56
fef8985e 57struct dev_ops vinum_ops =
984263bc 58{
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59 { "vinum", VINUM_CDEV_MAJOR, D_DISK },
60 .d_open = vinumopen,
61 .d_close = vinumclose,
62 .d_read = physread,
63 .d_write = physwrite,
64 .d_ioctl = vinumioctl,
65 .d_poll = vinumpoll,
66 .d_strategy = vinumstrategy,
67 .d_dump = vinumdump,
e381404c 68 .d_psize = vinumsize,
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69};
70
71/* Called by main() during pseudo-device attachment. */
72STATIC void vinumattach(void *);
73
74STATIC int vinum_modevent(module_t mod, modeventtype_t type, void *unused);
75
76struct _vinum_conf vinum_conf; /* configuration information */
77
78/*
79 * Called by main() during pseudo-device attachment. All we need
80 * to do is allocate enough space for devices to be configured later, and
81 * add devsw entries.
82 */
83void
84vinumattach(void *dummy)
85{
86 char *cp, *cp1, *cp2, **drives;
87 int i, rv;
88 struct volume *vol;
89
90 /* modload should prevent multiple loads, so this is worth a panic */
91 if ((vinum_conf.flags & VF_LOADED) != 0)
92 panic("vinum: already loaded");
93
94 log(LOG_INFO, "vinum: loaded\n");
95 vinum_conf.flags |= VF_LOADED; /* we're loaded now */
96
97 daemonq = NULL; /* initialize daemon's work queue */
98 dqend = NULL;
99
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100#if 0
101 dev_ops_add(&vinum_ops, 0, 0);
102#endif
984263bc 103
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104 vinum_conf.physbufs = nswbuf / 2 + 1; /* maximum amount of physical bufs */
105
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106 /* allocate space: drives... */
107 DRIVE = (struct drive *) Malloc(sizeof(struct drive) * INITIAL_DRIVES);
108 CHECKALLOC(DRIVE, "vinum: no memory\n");
109 bzero(DRIVE, sizeof(struct drive) * INITIAL_DRIVES);
110 vinum_conf.drives_allocated = INITIAL_DRIVES; /* number of drive slots allocated */
111 vinum_conf.drives_used = 0; /* and number in use */
112
113 /* volumes, ... */
114 VOL = (struct volume *) Malloc(sizeof(struct volume) * INITIAL_VOLUMES);
115 CHECKALLOC(VOL, "vinum: no memory\n");
116 bzero(VOL, sizeof(struct volume) * INITIAL_VOLUMES);
117 vinum_conf.volumes_allocated = INITIAL_VOLUMES; /* number of volume slots allocated */
118 vinum_conf.volumes_used = 0; /* and number in use */
119
120 /* plexes, ... */
121 PLEX = (struct plex *) Malloc(sizeof(struct plex) * INITIAL_PLEXES);
122 CHECKALLOC(PLEX, "vinum: no memory\n");
123 bzero(PLEX, sizeof(struct plex) * INITIAL_PLEXES);
124 vinum_conf.plexes_allocated = INITIAL_PLEXES; /* number of plex slots allocated */
125 vinum_conf.plexes_used = 0; /* and number in use */
126
127 /* and subdisks */
128 SD = (struct sd *) Malloc(sizeof(struct sd) * INITIAL_SUBDISKS);
129 CHECKALLOC(SD, "vinum: no memory\n");
130 bzero(SD, sizeof(struct sd) * INITIAL_SUBDISKS);
131 vinum_conf.subdisks_allocated = INITIAL_SUBDISKS; /* number of sd slots allocated */
132 vinum_conf.subdisks_used = 0; /* and number in use */
133
134 /*
135 * See if the loader has passed us a disk to
136 * read the initial configuration from.
137 */
bc01a404 138 if ((cp = kgetenv("vinum.drives")) != NULL) {
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139 for (cp1 = cp, i = 0, drives = 0; *cp1 != '\0'; i++) {
140 cp2 = cp1;
141 while (*cp1 != '\0' && *cp1 != ',' && *cp1 != ' ')
142 cp1++;
143 if (*cp1 != '\0')
144 *cp1++ = '\0';
77652cad 145 drives = krealloc(drives, (unsigned long)((i + 1) * sizeof(char *)),
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146 M_TEMP, M_WAITOK);
147 drives[i] = cp2;
148 }
149 if (i == 0)
150 goto bailout;
151 rv = vinum_scandisk(drives, i);
152 if (rv)
153 log(LOG_NOTICE, "vinum_scandisk() returned %d", rv);
154 bailout:
efda3bd0 155 kfree(drives, M_TEMP);
984263bc 156 }
bc01a404 157 if ((cp = kgetenv("vinum.root")) != NULL) {
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158 for (i = 0; i < vinum_conf.volumes_used; i++) {
159 vol = &vinum_conf.volume[i];
160 if ((vol->state == volume_up)
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161 && (strcmp (vol->name, cp) == 0)
162 ) {
fef8985e 163 rootdev = make_dev(&vinum_ops, i, UID_ROOT, GID_OPERATOR,
e4c9c0c8 164 0640, "vinum");
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165 log(LOG_INFO, "vinum: using volume %s for root device\n", cp);
166 break;
167 }
168 }
169 }
170}
171
172/*
173 * Check if we have anything open. If confopen is != 0,
174 * that goes for the super device as well, otherwise
175 * only for volumes.
176 *
177 * Return 0 if not inactive, 1 if inactive.
178 */
179int
180vinum_inactive(int confopen)
181{
182 int i;
183 int can_do = 1; /* assume we can do it */
184
185 if (confopen && (vinum_conf.flags & VF_OPEN)) /* open by vinum(8)? */
186 return 0; /* can't do it while we're open */
187 lock_config();
188 for (i = 0; i < vinum_conf.volumes_allocated; i++) {
189 if ((VOL[i].state > volume_down)
190 && (VOL[i].flags & VF_OPEN)) { /* volume is open */
191 can_do = 0;
192 break;
193 }
194 }
195 unlock_config();
196 return can_do;
197}
198
199/*
200 * Free all structures.
201 * If cleardrive is 0, save the configuration; otherwise
202 * remove the configuration from the drive.
203 *
204 * Before coming here, ensure that no volumes are open.
205 */
206void
207free_vinum(int cleardrive)
208{
209 int i;
210 int drives_allocated = vinum_conf.drives_allocated;
211
212 if (DRIVE != NULL) {
213 if (cleardrive) { /* remove the vinum config */
214 for (i = 0; i < drives_allocated; i++)
215 remove_drive(i); /* remove the drive */
216 } else { /* keep the config */
217 for (i = 0; i < drives_allocated; i++)
218 free_drive(&DRIVE[i]); /* close files and things */
219 }
220 Free(DRIVE);
221 }
222 while ((vinum_conf.flags & (VF_STOPPING | VF_DAEMONOPEN))
223 == (VF_STOPPING | VF_DAEMONOPEN)) { /* at least one daemon open, we're stopping */
224 queue_daemon_request(daemonrq_return, (union daemoninfo) 0); /* stop the daemon */
377d4740 225 tsleep(&vinumclose, 0, "vstop", 1); /* and wait for it */
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226 }
227 if (SD != NULL)
228 Free(SD);
229 if (PLEX != NULL) {
230 for (i = 0; i < vinum_conf.plexes_allocated; i++) {
231 struct plex *plex = &vinum_conf.plex[i];
232
233 if (plex->state != plex_unallocated) { /* we have real data there */
234 if (plex->sdnos)
235 Free(plex->sdnos);
236 }
237 }
238 Free(PLEX);
239 }
240 if (VOL != NULL)
241 Free(VOL);
242 bzero(&vinum_conf, sizeof(vinum_conf));
243}
244
245STATIC int
246vinum_modevent(module_t mod, modeventtype_t type, void *unused)
247{
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248 switch (type) {
249 case MOD_LOAD:
250 vinumattach(NULL);
251 return 0; /* OK */
252 case MOD_UNLOAD:
253 if (!vinum_inactive(1)) /* is anything open? */
254 return EBUSY; /* yes, we can't do it */
255 vinum_conf.flags |= VF_STOPPING; /* note that we want to stop */
753fd850 256 sys_sync(NULL); /* write out buffers */
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257 free_vinum(0); /* clean up */
258#ifdef VINUMDEBUG
259 if (total_malloced) {
260 int i;
261#ifdef INVARIANTS
262 int *poke;
263#endif
264
265 for (i = 0; i < malloccount; i++) {
266 if (debug & DEBUG_WARNINGS) /* want to hear about them */
267 log(LOG_WARNING,
268 "vinum: exiting with %d bytes malloced from %s:%d\n",
269 malloced[i].size,
270 malloced[i].file,
271 malloced[i].line);
272#ifdef INVARIANTS
273 poke = &((int *) malloced[i].address)
274 [malloced[i].size / (2 * sizeof(int))]; /* middle of the area */
275 if (*poke == 0xdeadc0de) /* already freed */
276 log(LOG_ERR,
277 "vinum: exiting with malloc table inconsistency at %p from %s:%d\n",
278 malloced[i].address,
279 malloced[i].file,
280 malloced[i].line);
281#endif
282 Free(malloced[i].address);
283 }
284 }
285#endif
cd29885a 286 dev_ops_remove_all(&vinum_ops);
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287 log(LOG_INFO, "vinum: unloaded\n"); /* tell the world */
288 return 0;
289 default:
290 break;
291 }
292 return 0;
293}
294
295moduledata_t vinum_mod =
296{
297 "vinum",
298 (modeventhand_t) vinum_modevent,
299 0
300};
5dbaf12c 301DECLARE_MODULE(vinum, vinum_mod, SI_SUB_RAID, SI_ORDER_MIDDLE);
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302
303/* ARGSUSED */
304/* Open a vinum object */
305int
fef8985e 306vinumopen(struct dev_open_args *ap)
984263bc 307{
b13267a5 308 cdev_t dev = ap->a_head.a_dev;
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309 int error;
310 unsigned int index;
311 struct volume *vol;
312 struct plex *plex;
313 struct sd *sd;
314 int devminor; /* minor number */
315
316 devminor = minor(dev);
317 error = 0;
318 /* First, decide what we're looking at */
319 switch (DEVTYPE(dev)) {
320 case VINUM_VOLUME_TYPE:
321 index = Volno(dev);
322 if (index >= vinum_conf.volumes_allocated)
323 return ENXIO; /* no such device */
324 vol = &VOL[index];
325
326 switch (vol->state) {
327 case volume_unallocated:
328 case volume_uninit:
329 return ENXIO;
330
331 case volume_up:
332 vol->flags |= VF_OPEN; /* note we're open */
333 return 0;
334
335 case volume_down:
336 return EIO;
337
338 default:
339 return EINVAL;
340 }
341
342 case VINUM_PLEX_TYPE:
343 if (Volno(dev) >= vinum_conf.volumes_allocated)
344 return ENXIO;
345 /* FALLTHROUGH */
346
347 case VINUM_RAWPLEX_TYPE:
348 index = Plexno(dev); /* get plex index in vinum_conf */
349 if (index >= vinum_conf.plexes_allocated)
350 return ENXIO; /* no such device */
351 plex = &PLEX[index];
352
353 switch (plex->state) {
354 case plex_referenced:
355 case plex_unallocated:
356 return EINVAL;
357
358 default:
359 plex->flags |= VF_OPEN; /* note we're open */
360 return 0;
361 }
362
363 case VINUM_SD_TYPE:
364 if ((Volno(dev) >= vinum_conf.volumes_allocated) /* no such volume */
365 ||(Plexno(dev) >= vinum_conf.plexes_allocated)) /* or no such plex */
366 return ENXIO; /* no such device */
367
368 /* FALLTHROUGH */
369
370 case VINUM_RAWSD_TYPE:
371 index = Sdno(dev); /* get the subdisk number */
372 if ((index >= vinum_conf.subdisks_allocated) /* not a valid SD entry */
373 ||(SD[index].state < sd_init)) /* or SD is not real */
374 return ENXIO; /* no such device */
375 sd = &SD[index];
376
377 /*
378 * Opening a subdisk is always a special operation, so we
379 * ignore the state as long as it represents a real subdisk
380 */
381 switch (sd->state) {
382 case sd_unallocated:
383 case sd_uninit:
384 return EINVAL;
385
386 default:
387 sd->flags |= VF_OPEN; /* note we're open */
388 return 0;
389 }
390
391 case VINUM_SUPERDEV_TYPE:
895c1f85 392 error = priv_check_cred(ap->a_cred, PRIV_ROOT, 0); /* are we root? */
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393 if (error == 0) { /* yes, can do */
394 if (devminor == VINUM_DAEMON_DEV) /* daemon device */
395 vinum_conf.flags |= VF_DAEMONOPEN; /* we're open */
396 else if (devminor == VINUM_SUPERDEV)
397 vinum_conf.flags |= VF_OPEN; /* we're open */
398 else
399 error = ENODEV; /* nothing, maybe a debug mismatch */
400 }
401 return error;
402
403 /* Vinum drives are disks. We already have a disk
404 * driver, so don't handle them here */
405 case VINUM_DRIVE_TYPE:
406 default:
407 return ENODEV; /* don't know what to do with these */
408 }
409}
410
411/* ARGSUSED */
412int
fef8985e 413vinumclose(struct dev_close_args *ap)
984263bc 414{
b13267a5 415 cdev_t dev = ap->a_head.a_dev;
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416 unsigned int index;
417 struct volume *vol;
418 int devminor;
419
420 devminor = minor(dev);
421 index = Volno(dev);
422 /* First, decide what we're looking at */
423 switch (DEVTYPE(dev)) {
424 case VINUM_VOLUME_TYPE:
425 if (index >= vinum_conf.volumes_allocated)
426 return ENXIO; /* no such device */
427 vol = &VOL[index];
428
429 switch (vol->state) {
430 case volume_unallocated:
431 case volume_uninit:
432 return ENXIO;
433
434 case volume_up:
435 vol->flags &= ~VF_OPEN; /* reset our flags */
436 return 0;
437
438 case volume_down:
439 return EIO;
440
441 default:
442 return EINVAL;
443 }
444
445 case VINUM_PLEX_TYPE:
446 if (Volno(dev) >= vinum_conf.volumes_allocated)
447 return ENXIO;
448 /* FALLTHROUGH */
449
450 case VINUM_RAWPLEX_TYPE:
451 index = Plexno(dev); /* get plex index in vinum_conf */
452 if (index >= vinum_conf.plexes_allocated)
453 return ENXIO; /* no such device */
454 PLEX[index].flags &= ~VF_OPEN; /* reset our flags */
455 return 0;
456
457 case VINUM_SD_TYPE:
458 if ((Volno(dev) >= vinum_conf.volumes_allocated) || /* no such volume */
459 (Plexno(dev) >= vinum_conf.plexes_allocated)) /* or no such plex */
460 return ENXIO; /* no such device */
461 /* FALLTHROUGH */
462
463 case VINUM_RAWSD_TYPE:
464 index = Sdno(dev); /* get the subdisk number */
465 if (index >= vinum_conf.subdisks_allocated)
466 return ENXIO; /* no such device */
467 SD[index].flags &= ~VF_OPEN; /* reset our flags */
468 return 0;
469
470 case VINUM_SUPERDEV_TYPE:
471 /*
472 * don't worry about whether we're root:
473 * nobody else would get this far.
474 */
475 if (devminor == VINUM_SUPERDEV) /* normal superdev */
476 vinum_conf.flags &= ~VF_OPEN; /* no longer open */
477 else if (devminor == VINUM_DAEMON_DEV) { /* the daemon device */
478 vinum_conf.flags &= ~VF_DAEMONOPEN; /* no longer open */
479 if (vinum_conf.flags & VF_STOPPING) /* we're stopping, */
480 wakeup(&vinumclose); /* we can continue stopping now */
481 }
482 return 0;
483
484 case VINUM_DRIVE_TYPE:
485 default:
486 return ENODEV; /* don't know what to do with these */
487 }
488}
489
490/* size routine */
491int
fef8985e 492vinumsize(struct dev_psize_args *ap)
984263bc 493{
b13267a5 494 cdev_t dev = ap->a_head.a_dev;
984263bc 495 struct volume *vol;
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496
497 vol = &VOL[Volno(dev)];
498
fef8985e 499 if (vol->state == volume_up) {
e0fc5693 500 ap->a_result = (int64_t)vol->size;
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501 return(0);
502 } else {
503 return(ENXIO);
504 }
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505}
506
507int
fef8985e 508vinumdump(struct dev_dump_args *ap)
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509{
510 /* Not implemented. */
511 return ENXIO;
512}
513
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514int
515vinumpoll(struct dev_poll_args *ap)
516{
517 ap->a_events = seltrue(ap->a_head.a_dev, ap->a_events);
518 return(0);
519}
520
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521/* Local Variables: */
522/* fill-column: 50 */
523/* End: */