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 1.18 2006/09/10 01:26:36 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,
70 /* Called by main() during pseudo-device attachment. */
71 STATIC void vinumattach(void *);
73 STATIC int vinum_modevent(module_t mod, modeventtype_t type, void *unused);
75 struct _vinum_conf vinum_conf; /* configuration information */
78 * Called by main() during pseudo-device attachment. All we need
79 * to do is allocate enough space for devices to be configured later, and
83 vinumattach(void *dummy)
85 char *cp, *cp1, *cp2, **drives;
89 /* modload should prevent multiple loads, so this is worth a panic */
90 if ((vinum_conf.flags & VF_LOADED) != 0)
91 panic("vinum: already loaded");
93 log(LOG_INFO, "vinum: loaded\n");
94 vinum_conf.flags |= VF_LOADED; /* we're loaded now */
96 daemonq = NULL; /* initialize daemon's work queue */
99 dev_ops_add(&vinum_ops, 0, 0); /* add the ops entry */
101 vinum_conf.physbufs = nswbuf / 2 + 1; /* maximum amount of physical bufs */
103 /* allocate space: drives... */
104 DRIVE = (struct drive *) Malloc(sizeof(struct drive) * INITIAL_DRIVES);
105 CHECKALLOC(DRIVE, "vinum: no memory\n");
106 bzero(DRIVE, sizeof(struct drive) * INITIAL_DRIVES);
107 vinum_conf.drives_allocated = INITIAL_DRIVES; /* number of drive slots allocated */
108 vinum_conf.drives_used = 0; /* and number in use */
111 VOL = (struct volume *) Malloc(sizeof(struct volume) * INITIAL_VOLUMES);
112 CHECKALLOC(VOL, "vinum: no memory\n");
113 bzero(VOL, sizeof(struct volume) * INITIAL_VOLUMES);
114 vinum_conf.volumes_allocated = INITIAL_VOLUMES; /* number of volume slots allocated */
115 vinum_conf.volumes_used = 0; /* and number in use */
118 PLEX = (struct plex *) Malloc(sizeof(struct plex) * INITIAL_PLEXES);
119 CHECKALLOC(PLEX, "vinum: no memory\n");
120 bzero(PLEX, sizeof(struct plex) * INITIAL_PLEXES);
121 vinum_conf.plexes_allocated = INITIAL_PLEXES; /* number of plex slots allocated */
122 vinum_conf.plexes_used = 0; /* and number in use */
125 SD = (struct sd *) Malloc(sizeof(struct sd) * INITIAL_SUBDISKS);
126 CHECKALLOC(SD, "vinum: no memory\n");
127 bzero(SD, sizeof(struct sd) * INITIAL_SUBDISKS);
128 vinum_conf.subdisks_allocated = INITIAL_SUBDISKS; /* number of sd slots allocated */
129 vinum_conf.subdisks_used = 0; /* and number in use */
132 * See if the loader has passed us a disk to
133 * read the initial configuration from.
135 if ((cp = kgetenv("vinum.drives")) != NULL) {
136 for (cp1 = cp, i = 0, drives = 0; *cp1 != '\0'; i++) {
138 while (*cp1 != '\0' && *cp1 != ',' && *cp1 != ' ')
142 drives = krealloc(drives, (unsigned long)((i + 1) * sizeof(char *)),
148 rv = vinum_scandisk(drives, i);
150 log(LOG_NOTICE, "vinum_scandisk() returned %d", rv);
152 kfree(drives, M_TEMP);
154 if ((cp = kgetenv("vinum.root")) != NULL) {
155 for (i = 0; i < vinum_conf.volumes_used; i++) {
156 vol = &vinum_conf.volume[i];
157 if ((vol->state == volume_up)
158 && (strcmp (vol->name, cp) == 0)
160 rootdev = make_dev(&vinum_ops, i, UID_ROOT, GID_OPERATOR,
162 log(LOG_INFO, "vinum: using volume %s for root device\n", cp);
170 * Check if we have anything open. If confopen is != 0,
171 * that goes for the super device as well, otherwise
174 * Return 0 if not inactive, 1 if inactive.
177 vinum_inactive(int confopen)
180 int can_do = 1; /* assume we can do it */
182 if (confopen && (vinum_conf.flags & VF_OPEN)) /* open by vinum(8)? */
183 return 0; /* can't do it while we're open */
185 for (i = 0; i < vinum_conf.volumes_allocated; i++) {
186 if ((VOL[i].state > volume_down)
187 && (VOL[i].flags & VF_OPEN)) { /* volume is open */
197 * Free all structures.
198 * If cleardrive is 0, save the configuration; otherwise
199 * remove the configuration from the drive.
201 * Before coming here, ensure that no volumes are open.
204 free_vinum(int cleardrive)
207 int drives_allocated = vinum_conf.drives_allocated;
210 if (cleardrive) { /* remove the vinum config */
211 for (i = 0; i < drives_allocated; i++)
212 remove_drive(i); /* remove the drive */
213 } else { /* keep the config */
214 for (i = 0; i < drives_allocated; i++)
215 free_drive(&DRIVE[i]); /* close files and things */
219 while ((vinum_conf.flags & (VF_STOPPING | VF_DAEMONOPEN))
220 == (VF_STOPPING | VF_DAEMONOPEN)) { /* at least one daemon open, we're stopping */
221 queue_daemon_request(daemonrq_return, (union daemoninfo) 0); /* stop the daemon */
222 tsleep(&vinumclose, 0, "vstop", 1); /* and wait for it */
227 for (i = 0; i < vinum_conf.plexes_allocated; i++) {
228 struct plex *plex = &vinum_conf.plex[i];
230 if (plex->state != plex_unallocated) { /* we have real data there */
239 bzero(&vinum_conf, sizeof(vinum_conf));
243 vinum_modevent(module_t mod, modeventtype_t type, void *unused)
250 if (!vinum_inactive(1)) /* is anything open? */
251 return EBUSY; /* yes, we can't do it */
252 vinum_conf.flags |= VF_STOPPING; /* note that we want to stop */
253 sys_sync(NULL); /* write out buffers */
254 free_vinum(0); /* clean up */
256 if (total_malloced) {
262 for (i = 0; i < malloccount; i++) {
263 if (debug & DEBUG_WARNINGS) /* want to hear about them */
265 "vinum: exiting with %d bytes malloced from %s:%d\n",
270 poke = &((int *) malloced[i].address)
271 [malloced[i].size / (2 * sizeof(int))]; /* middle of the area */
272 if (*poke == 0xdeadc0de) /* already freed */
274 "vinum: exiting with malloc table inconsistency at %p from %s:%d\n",
279 Free(malloced[i].address);
283 dev_ops_remove(&vinum_ops, 0, 0);
284 log(LOG_INFO, "vinum: unloaded\n"); /* tell the world */
292 moduledata_t vinum_mod =
295 (modeventhand_t) vinum_modevent,
298 DECLARE_MODULE(vinum, vinum_mod, SI_SUB_RAID, SI_ORDER_MIDDLE);
301 /* Open a vinum object */
303 vinumopen(struct dev_open_args *ap)
305 cdev_t dev = ap->a_head.a_dev;
311 int devminor; /* minor number */
313 devminor = minor(dev);
315 /* First, decide what we're looking at */
316 switch (DEVTYPE(dev)) {
317 case VINUM_VOLUME_TYPE:
319 if (index >= vinum_conf.volumes_allocated)
320 return ENXIO; /* no such device */
323 switch (vol->state) {
324 case volume_unallocated:
329 vol->flags |= VF_OPEN; /* note we're open */
339 case VINUM_PLEX_TYPE:
340 if (Volno(dev) >= vinum_conf.volumes_allocated)
344 case VINUM_RAWPLEX_TYPE:
345 index = Plexno(dev); /* get plex index in vinum_conf */
346 if (index >= vinum_conf.plexes_allocated)
347 return ENXIO; /* no such device */
350 switch (plex->state) {
351 case plex_referenced:
352 case plex_unallocated:
356 plex->flags |= VF_OPEN; /* note we're open */
361 if ((Volno(dev) >= vinum_conf.volumes_allocated) /* no such volume */
362 ||(Plexno(dev) >= vinum_conf.plexes_allocated)) /* or no such plex */
363 return ENXIO; /* no such device */
367 case VINUM_RAWSD_TYPE:
368 index = Sdno(dev); /* get the subdisk number */
369 if ((index >= vinum_conf.subdisks_allocated) /* not a valid SD entry */
370 ||(SD[index].state < sd_init)) /* or SD is not real */
371 return ENXIO; /* no such device */
375 * Opening a subdisk is always a special operation, so we
376 * ignore the state as long as it represents a real subdisk
384 sd->flags |= VF_OPEN; /* note we're open */
388 case VINUM_SUPERDEV_TYPE:
389 error = suser_cred(ap->a_cred, 0); /* are we root? */
390 if (error == 0) { /* yes, can do */
391 if (devminor == VINUM_DAEMON_DEV) /* daemon device */
392 vinum_conf.flags |= VF_DAEMONOPEN; /* we're open */
393 else if (devminor == VINUM_SUPERDEV)
394 vinum_conf.flags |= VF_OPEN; /* we're open */
396 error = ENODEV; /* nothing, maybe a debug mismatch */
400 /* Vinum drives are disks. We already have a disk
401 * driver, so don't handle them here */
402 case VINUM_DRIVE_TYPE:
404 return ENODEV; /* don't know what to do with these */
410 vinumclose(struct dev_close_args *ap)
412 cdev_t dev = ap->a_head.a_dev;
417 devminor = minor(dev);
419 /* First, decide what we're looking at */
420 switch (DEVTYPE(dev)) {
421 case VINUM_VOLUME_TYPE:
422 if (index >= vinum_conf.volumes_allocated)
423 return ENXIO; /* no such device */
426 switch (vol->state) {
427 case volume_unallocated:
432 vol->flags &= ~VF_OPEN; /* reset our flags */
442 case VINUM_PLEX_TYPE:
443 if (Volno(dev) >= vinum_conf.volumes_allocated)
447 case VINUM_RAWPLEX_TYPE:
448 index = Plexno(dev); /* get plex index in vinum_conf */
449 if (index >= vinum_conf.plexes_allocated)
450 return ENXIO; /* no such device */
451 PLEX[index].flags &= ~VF_OPEN; /* reset our flags */
455 if ((Volno(dev) >= vinum_conf.volumes_allocated) || /* no such volume */
456 (Plexno(dev) >= vinum_conf.plexes_allocated)) /* or no such plex */
457 return ENXIO; /* no such device */
460 case VINUM_RAWSD_TYPE:
461 index = Sdno(dev); /* get the subdisk number */
462 if (index >= vinum_conf.subdisks_allocated)
463 return ENXIO; /* no such device */
464 SD[index].flags &= ~VF_OPEN; /* reset our flags */
467 case VINUM_SUPERDEV_TYPE:
469 * don't worry about whether we're root:
470 * nobody else would get this far.
472 if (devminor == VINUM_SUPERDEV) /* normal superdev */
473 vinum_conf.flags &= ~VF_OPEN; /* no longer open */
474 else if (devminor == VINUM_DAEMON_DEV) { /* the daemon device */
475 vinum_conf.flags &= ~VF_DAEMONOPEN; /* no longer open */
476 if (vinum_conf.flags & VF_STOPPING) /* we're stopping, */
477 wakeup(&vinumclose); /* we can continue stopping now */
481 case VINUM_DRIVE_TYPE:
483 return ENODEV; /* don't know what to do with these */
489 vinumsize(struct dev_psize_args *ap)
491 cdev_t dev = ap->a_head.a_dev;
494 vol = &VOL[Volno(dev)];
496 if (vol->state == volume_up) {
497 ap->a_result = vol->size;
505 vinumdump(struct dev_dump_args *ap)
507 /* Not implemented. */
512 vinumpoll(struct dev_poll_args *ap)
514 ap->a_events = seltrue(ap->a_head.a_dev, ap->a_events);
518 /* Local Variables: */
519 /* fill-column: 50 */