2 * Copyright (c) 1997, 1998
3 * Nan Yang Computer Services Limited. All rights reserved.
5 * Written by Greg Lehey
7 * This software is distributed under the so-called ``Berkeley
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
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
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.
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.
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 $
43 #define STATIC static /* nothing while we're testing XXX */
46 #include <sys/sysproto.h> /* for sync(2) */
47 #include <sys/devicestat.h>
49 #include <sys/reboot.h>
51 extern int total_malloced;
52 extern int malloccount;
53 extern struct mc malloced[];
57 struct dev_ops vinum_ops =
59 { "vinum", VINUM_CDEV_MAJOR, D_DISK },
61 .d_close = vinumclose,
64 .d_ioctl = vinumioctl,
66 .d_strategy = vinumstrategy,
71 /* Called by main() during pseudo-device attachment. */
72 STATIC void vinumattach(void *);
74 STATIC int vinum_modevent(module_t mod, modeventtype_t type, void *unused);
76 struct _vinum_conf vinum_conf; /* configuration information */
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
84 vinumattach(void *dummy)
86 char *cp, *cp1, *cp2, **drives;
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");
94 log(LOG_INFO, "vinum: loaded\n");
95 vinum_conf.flags |= VF_LOADED; /* we're loaded now */
97 daemonq = NULL; /* initialize daemon's work queue */
100 dev_ops_add(&vinum_ops, 0, 0); /* add the ops entry */
102 vinum_conf.physbufs = nswbuf / 2 + 1; /* maximum amount of physical bufs */
104 /* allocate space: drives... */
105 DRIVE = (struct drive *) Malloc(sizeof(struct drive) * INITIAL_DRIVES);
106 CHECKALLOC(DRIVE, "vinum: no memory\n");
107 bzero(DRIVE, sizeof(struct drive) * INITIAL_DRIVES);
108 vinum_conf.drives_allocated = INITIAL_DRIVES; /* number of drive slots allocated */
109 vinum_conf.drives_used = 0; /* and number in use */
112 VOL = (struct volume *) Malloc(sizeof(struct volume) * INITIAL_VOLUMES);
113 CHECKALLOC(VOL, "vinum: no memory\n");
114 bzero(VOL, sizeof(struct volume) * INITIAL_VOLUMES);
115 vinum_conf.volumes_allocated = INITIAL_VOLUMES; /* number of volume slots allocated */
116 vinum_conf.volumes_used = 0; /* and number in use */
119 PLEX = (struct plex *) Malloc(sizeof(struct plex) * INITIAL_PLEXES);
120 CHECKALLOC(PLEX, "vinum: no memory\n");
121 bzero(PLEX, sizeof(struct plex) * INITIAL_PLEXES);
122 vinum_conf.plexes_allocated = INITIAL_PLEXES; /* number of plex slots allocated */
123 vinum_conf.plexes_used = 0; /* and number in use */
126 SD = (struct sd *) Malloc(sizeof(struct sd) * INITIAL_SUBDISKS);
127 CHECKALLOC(SD, "vinum: no memory\n");
128 bzero(SD, sizeof(struct sd) * INITIAL_SUBDISKS);
129 vinum_conf.subdisks_allocated = INITIAL_SUBDISKS; /* number of sd slots allocated */
130 vinum_conf.subdisks_used = 0; /* and number in use */
133 * See if the loader has passed us a disk to
134 * read the initial configuration from.
136 if ((cp = kgetenv("vinum.drives")) != NULL) {
137 for (cp1 = cp, i = 0, drives = 0; *cp1 != '\0'; i++) {
139 while (*cp1 != '\0' && *cp1 != ',' && *cp1 != ' ')
143 drives = krealloc(drives, (unsigned long)((i + 1) * sizeof(char *)),
149 rv = vinum_scandisk(drives, i);
151 log(LOG_NOTICE, "vinum_scandisk() returned %d", rv);
153 kfree(drives, M_TEMP);
155 if ((cp = kgetenv("vinum.root")) != NULL) {
156 for (i = 0; i < vinum_conf.volumes_used; i++) {
157 vol = &vinum_conf.volume[i];
158 if ((vol->state == volume_up)
159 && (strcmp (vol->name, cp) == 0)
161 rootdev = make_dev(&vinum_ops, i, UID_ROOT, GID_OPERATOR,
163 log(LOG_INFO, "vinum: using volume %s for root device\n", cp);
171 * Check if we have anything open. If confopen is != 0,
172 * that goes for the super device as well, otherwise
175 * Return 0 if not inactive, 1 if inactive.
178 vinum_inactive(int confopen)
181 int can_do = 1; /* assume we can do it */
183 if (confopen && (vinum_conf.flags & VF_OPEN)) /* open by vinum(8)? */
184 return 0; /* can't do it while we're open */
186 for (i = 0; i < vinum_conf.volumes_allocated; i++) {
187 if ((VOL[i].state > volume_down)
188 && (VOL[i].flags & VF_OPEN)) { /* volume is open */
198 * Free all structures.
199 * If cleardrive is 0, save the configuration; otherwise
200 * remove the configuration from the drive.
202 * Before coming here, ensure that no volumes are open.
205 free_vinum(int cleardrive)
208 int drives_allocated = vinum_conf.drives_allocated;
211 if (cleardrive) { /* remove the vinum config */
212 for (i = 0; i < drives_allocated; i++)
213 remove_drive(i); /* remove the drive */
214 } else { /* keep the config */
215 for (i = 0; i < drives_allocated; i++)
216 free_drive(&DRIVE[i]); /* close files and things */
220 while ((vinum_conf.flags & (VF_STOPPING | VF_DAEMONOPEN))
221 == (VF_STOPPING | VF_DAEMONOPEN)) { /* at least one daemon open, we're stopping */
222 queue_daemon_request(daemonrq_return, (union daemoninfo) 0); /* stop the daemon */
223 tsleep(&vinumclose, 0, "vstop", 1); /* and wait for it */
228 for (i = 0; i < vinum_conf.plexes_allocated; i++) {
229 struct plex *plex = &vinum_conf.plex[i];
231 if (plex->state != plex_unallocated) { /* we have real data there */
240 bzero(&vinum_conf, sizeof(vinum_conf));
244 vinum_modevent(module_t mod, modeventtype_t type, void *unused)
251 if (!vinum_inactive(1)) /* is anything open? */
252 return EBUSY; /* yes, we can't do it */
253 vinum_conf.flags |= VF_STOPPING; /* note that we want to stop */
254 sys_sync(NULL); /* write out buffers */
255 free_vinum(0); /* clean up */
257 if (total_malloced) {
263 for (i = 0; i < malloccount; i++) {
264 if (debug & DEBUG_WARNINGS) /* want to hear about them */
266 "vinum: exiting with %d bytes malloced from %s:%d\n",
271 poke = &((int *) malloced[i].address)
272 [malloced[i].size / (2 * sizeof(int))]; /* middle of the area */
273 if (*poke == 0xdeadc0de) /* already freed */
275 "vinum: exiting with malloc table inconsistency at %p from %s:%d\n",
280 Free(malloced[i].address);
284 dev_ops_remove(&vinum_ops, 0, 0);
285 log(LOG_INFO, "vinum: unloaded\n"); /* tell the world */
293 moduledata_t vinum_mod =
296 (modeventhand_t) vinum_modevent,
299 DECLARE_MODULE(vinum, vinum_mod, SI_SUB_RAID, SI_ORDER_MIDDLE);
302 /* Open a vinum object */
304 vinumopen(struct dev_open_args *ap)
306 cdev_t dev = ap->a_head.a_dev;
312 int devminor; /* minor number */
314 devminor = minor(dev);
316 /* First, decide what we're looking at */
317 switch (DEVTYPE(dev)) {
318 case VINUM_VOLUME_TYPE:
320 if (index >= vinum_conf.volumes_allocated)
321 return ENXIO; /* no such device */
324 switch (vol->state) {
325 case volume_unallocated:
330 vol->flags |= VF_OPEN; /* note we're open */
340 case VINUM_PLEX_TYPE:
341 if (Volno(dev) >= vinum_conf.volumes_allocated)
345 case VINUM_RAWPLEX_TYPE:
346 index = Plexno(dev); /* get plex index in vinum_conf */
347 if (index >= vinum_conf.plexes_allocated)
348 return ENXIO; /* no such device */
351 switch (plex->state) {
352 case plex_referenced:
353 case plex_unallocated:
357 plex->flags |= VF_OPEN; /* note we're open */
362 if ((Volno(dev) >= vinum_conf.volumes_allocated) /* no such volume */
363 ||(Plexno(dev) >= vinum_conf.plexes_allocated)) /* or no such plex */
364 return ENXIO; /* no such device */
368 case VINUM_RAWSD_TYPE:
369 index = Sdno(dev); /* get the subdisk number */
370 if ((index >= vinum_conf.subdisks_allocated) /* not a valid SD entry */
371 ||(SD[index].state < sd_init)) /* or SD is not real */
372 return ENXIO; /* no such device */
376 * Opening a subdisk is always a special operation, so we
377 * ignore the state as long as it represents a real subdisk
385 sd->flags |= VF_OPEN; /* note we're open */
389 case VINUM_SUPERDEV_TYPE:
390 error = priv_check_cred(ap->a_cred, PRIV_ROOT, 0); /* are we root? */
391 if (error == 0) { /* yes, can do */
392 if (devminor == VINUM_DAEMON_DEV) /* daemon device */
393 vinum_conf.flags |= VF_DAEMONOPEN; /* we're open */
394 else if (devminor == VINUM_SUPERDEV)
395 vinum_conf.flags |= VF_OPEN; /* we're open */
397 error = ENODEV; /* nothing, maybe a debug mismatch */
401 /* Vinum drives are disks. We already have a disk
402 * driver, so don't handle them here */
403 case VINUM_DRIVE_TYPE:
405 return ENODEV; /* don't know what to do with these */
411 vinumclose(struct dev_close_args *ap)
413 cdev_t dev = ap->a_head.a_dev;
418 devminor = minor(dev);
420 /* First, decide what we're looking at */
421 switch (DEVTYPE(dev)) {
422 case VINUM_VOLUME_TYPE:
423 if (index >= vinum_conf.volumes_allocated)
424 return ENXIO; /* no such device */
427 switch (vol->state) {
428 case volume_unallocated:
433 vol->flags &= ~VF_OPEN; /* reset our flags */
443 case VINUM_PLEX_TYPE:
444 if (Volno(dev) >= vinum_conf.volumes_allocated)
448 case VINUM_RAWPLEX_TYPE:
449 index = Plexno(dev); /* get plex index in vinum_conf */
450 if (index >= vinum_conf.plexes_allocated)
451 return ENXIO; /* no such device */
452 PLEX[index].flags &= ~VF_OPEN; /* reset our flags */
456 if ((Volno(dev) >= vinum_conf.volumes_allocated) || /* no such volume */
457 (Plexno(dev) >= vinum_conf.plexes_allocated)) /* or no such plex */
458 return ENXIO; /* no such device */
461 case VINUM_RAWSD_TYPE:
462 index = Sdno(dev); /* get the subdisk number */
463 if (index >= vinum_conf.subdisks_allocated)
464 return ENXIO; /* no such device */
465 SD[index].flags &= ~VF_OPEN; /* reset our flags */
468 case VINUM_SUPERDEV_TYPE:
470 * don't worry about whether we're root:
471 * nobody else would get this far.
473 if (devminor == VINUM_SUPERDEV) /* normal superdev */
474 vinum_conf.flags &= ~VF_OPEN; /* no longer open */
475 else if (devminor == VINUM_DAEMON_DEV) { /* the daemon device */
476 vinum_conf.flags &= ~VF_DAEMONOPEN; /* no longer open */
477 if (vinum_conf.flags & VF_STOPPING) /* we're stopping, */
478 wakeup(&vinumclose); /* we can continue stopping now */
482 case VINUM_DRIVE_TYPE:
484 return ENODEV; /* don't know what to do with these */
490 vinumsize(struct dev_psize_args *ap)
492 cdev_t dev = ap->a_head.a_dev;
495 vol = &VOL[Volno(dev)];
497 if (vol->state == volume_up) {
498 ap->a_result = (int64_t)vol->size;
506 vinumdump(struct dev_dump_args *ap)
508 /* Not implemented. */
513 vinumpoll(struct dev_poll_args *ap)
515 ap->a_events = seltrue(ap->a_head.a_dev, ap->a_events);
519 /* Local Variables: */
520 /* fill-column: 50 */