2 * Copyright (c) 1997, 1998
3 * Nan Yang Computer Services Limited. All rights reserved.
5 * This software is distributed under the so-called ``Berkeley
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by Nan Yang Computer
20 * 4. Neither the name of the Company nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * This software is provided ``as is'', and any express or implied
25 * warranties, including, but not limited to, the implied warranties of
26 * merchantability and fitness for a particular purpose are disclaimed.
27 * In no event shall the company or contributors be liable for any
28 * direct, indirect, incidental, special, exemplary, or consequential
29 * damages (including, but not limited to, procurement of substitute
30 * goods or services; loss of use, data, or profits; or business
31 * interruption) however caused and on any theory of liability, whether
32 * in contract, strict liability, or tort (including negligence or
33 * otherwise) arising in any way out of the use of this software, even if
34 * advised of the possibility of such damage.
36 * $Id: vinumio.c,v 1.30 2000/05/10 23:23:30 grog Exp grog $
37 * $FreeBSD: src/sys/dev/vinum/vinumio.c,v 1.52.2.6 2002/05/02 08:43:44 grog Exp $
38 * $DragonFly: src/sys/dev/raid/vinum/vinumio.c,v 1.2 2003/06/17 04:28:33 dillon Exp $
41 #include <dev/vinum/vinumhdr.h>
42 #include <dev/vinum/request.h>
43 #include <vm/vm_zone.h>
45 static char *sappend(char *txt, char *s);
46 static int drivecmp(const void *va, const void *vb);
49 * Open the device associated with the drive, and set drive's vp.
50 * Return an error number
53 open_drive(struct drive *drive, struct proc *p, int verbose)
55 int devmajor; /* major devs for disk device */
56 int devminor; /* minor devs for disk device */
59 struct cdevsw *dsw; /* pointer to cdevsw entry */
61 if (bcmp(drive->devicename, "/dev/", 5)) /* device name doesn't start with /dev */
62 return ENOENT; /* give up */
63 if (drive->flags & VF_OPEN) /* open already, */
64 return EBUSY; /* don't do it again */
67 * Yes, Bruce, I know this is horrible, but we
68 * don't have a root file system when we first
69 * try to do this. If you can come up with a
70 * better solution, I'd really like it. I'm
71 * just putting it in now to add ammuntion to
72 * moving the system to devfs.
74 dname = &drive->devicename[5];
75 drive->dev = NULL; /* no device yet */
78 if (bcmp(dname, "ad", 2) == 0) /* IDE disk */
80 else if (bcmp(dname, "wd", 2) == 0) /* IDE disk */
82 else if (bcmp(dname, "da", 2) == 0)
84 else if (bcmp(dname, "vn", 2) == 0)
86 else if (bcmp(dname, "md", 2) == 0)
88 else if (bcmp(dname, "amrd", 4) == 0) {
91 } else if (bcmp(dname, "mlxd", 4) == 0) {
94 } else if (bcmp(dname, "idad", 4) == 0) {
97 } else if (bcmp(dname, "twed", 4) == 0) { /* 3ware raid */
102 dname += 2; /* point past */
105 * Found the device. We can expect one of
106 * two formats for the rest: a unit number,
107 * then either a partition letter for the
108 * compatiblity partition (e.g. h) or a
109 * slice ID and partition (e.g. s2e).
110 * Create a minor number for each of them.
113 while ((*dname >= '0') /* unit number */
115 unit = unit * 10 + *dname - '0';
119 if (*dname == 's') { /* slice */
120 if (((dname[1] < '1') || (dname[1] > '4')) /* invalid slice */
121 ||((dname[2] < 'a') || (dname[2] > 'h'))) /* or invalid partition */
123 devminor = ((unit & 31) << 3) /* unit */
124 +(dname[2] - 'a') /* partition */
125 +((dname[1] - '0' + 1) << 16) /* slice */
126 +((unit & ~31) << 16); /* high-order unit bits */
127 } else { /* compatibility partition */
128 if ((*dname < 'a') || (*dname > 'h')) /* or invalid partition */
130 devminor = (*dname - 'a') /* partition */
131 +((unit & 31) << 3) /* unit */
132 +((unit & ~31) << 16); /* high-order unit bits */
135 if ((devminor & 7) == 2) /* partition c */
136 return ENOTTY; /* not buying that */
138 drive->dev = makedev(devmajor, devminor); /* find the device */
139 if (drive->dev == NULL) /* didn't find anything */
142 drive->dev->si_iosize_max = DFLTPHYS;
143 dsw = devsw(drive->dev);
145 drive->lasterror = ENOENT;
147 drive->lasterror = (dsw->d_open) (drive->dev, FWRITE, 0, NULL);
149 if (drive->lasterror != 0) { /* failed */
150 drive->state = drive_down; /* just force it down */
153 "vinum open_drive %s: failed with error %d\n",
154 drive->devicename, drive->lasterror);
156 drive->flags |= VF_OPEN; /* we're open now */
158 return drive->lasterror;
162 * Set some variables in the drive struct
163 * in more convenient form. Return error indication
166 set_drive_parms(struct drive *drive)
168 drive->blocksize = BLKDEV_IOSIZE; /* do we need this? */
169 drive->secsperblock = drive->blocksize /* number of sectors per block */
170 / drive->partinfo.disklab->d_secsize;
172 /* Now update the label part */
173 bcopy(hostname, drive->label.sysname, VINUMHOSTNAMELEN); /* put in host name */
174 getmicrotime(&drive->label.date_of_birth); /* and current time */
175 drive->label.drive_size = ((u_int64_t) drive->partinfo.part->p_size) /* size of the drive in bytes */
176 *((u_int64_t) drive->partinfo.disklab->d_secsize);
178 if (debug & DEBUG_BIGDRIVE) /* pretend we're 100 times as big */
179 drive->label.drive_size *= 100;
182 /* number of sectors available for subdisks */
183 drive->sectors_available = drive->label.drive_size / DEV_BSIZE - DATASTART;
186 * Bug in 3.0 as of January 1998: you can open
187 * non-existent slices. They have a length of 0.
189 if (drive->label.drive_size < MINVINUMSLICE) { /* too small to worry about */
190 set_drive_state(drive->driveno, drive_down, setstate_force);
191 drive->lasterror = ENOSPC;
194 drive->freelist_size = INITIAL_DRIVE_FREELIST; /* initial number of entries */
195 drive->freelist = (struct drive_freelist *)
196 Malloc(INITIAL_DRIVE_FREELIST * sizeof(struct drive_freelist));
197 if (drive->freelist == NULL) /* can't malloc, dammit */
199 drive->freelist_entries = 1; /* just (almost) the complete drive */
200 drive->freelist[0].offset = DATASTART; /* starts here */
201 drive->freelist[0].sectors = (drive->label.drive_size >> DEV_BSHIFT) - DATASTART; /* and it's this long */
202 if (drive->label.name[0] != '\0') /* got a name */
203 set_drive_state(drive->driveno, drive_up, setstate_force); /* our drive is accessible */
204 else /* we know about it, but that's all */
205 drive->state = drive_referenced;
210 * Initialize a drive: open the device and add device
214 init_drive(struct drive *drive, int verbose)
216 if (drive->devicename[0] != '/') {
217 drive->lasterror = EINVAL;
218 log(LOG_ERR, "vinum: Can't open drive without drive name\n");
221 drive->lasterror = open_drive(drive, curproc, verbose); /* open the drive */
222 if (drive->lasterror)
223 return drive->lasterror;
225 drive->lasterror = (*devsw(drive->dev)->d_ioctl) (drive->dev,
227 (caddr_t) & drive->partinfo,
230 if (drive->lasterror) {
233 "vinum open_drive %s: Can't get partition information, drive->lasterror %d\n",
237 return drive->lasterror;
239 if (drive->partinfo.part->p_fstype != FS_VINUM) { /* not Vinum */
240 drive->lasterror = EFTYPE;
243 "vinum open_drive %s: Wrong partition type for vinum\n",
248 return set_drive_parms(drive); /* set various odds and ends */
251 /* Close a drive if it's open. */
253 close_drive(struct drive *drive)
255 LOCKDRIVE(drive); /* keep the daemon out */
256 if (drive->flags & VF_OPEN)
257 close_locked_drive(drive); /* and close it */
258 if (drive->state > drive_down) /* if it's up */
259 drive->state = drive_down; /* make sure it's down */
264 * Real drive close code, called with drive already locked.
265 * We have also checked that the drive is open. No errors.
268 close_locked_drive(struct drive *drive)
271 * If we can't access the drive, we can't flush
272 * the queues, which spec_close() will try to
273 * do. Get rid of them here first.
275 drive->lasterror = (*devsw(drive->dev)->d_close) (drive->dev, 0, 0, NULL);
276 drive->flags &= ~VF_OPEN; /* no longer open */
280 * Remove drive from the configuration.
281 * Caller must ensure that it isn't active.
284 remove_drive(int driveno)
286 struct drive *drive = &vinum_conf.drive[driveno];
287 struct vinum_hdr *vhdr; /* buffer for header */
290 if (drive->state > drive_referenced) { /* real drive */
291 if (drive->state == drive_up) {
292 vhdr = (struct vinum_hdr *) Malloc(VINUMHEADERLEN); /* allocate buffer */
293 CHECKALLOC(vhdr, "Can't allocate memory");
294 error = read_drive(drive, (void *) vhdr, VINUMHEADERLEN, VINUM_LABEL_OFFSET);
296 drive->lasterror = error;
298 vhdr->magic = VINUM_NOMAGIC; /* obliterate the magic, but leave the rest */
299 write_drive(drive, (void *) vhdr, VINUMHEADERLEN, VINUM_LABEL_OFFSET);
303 free_drive(drive); /* close it and free resources */
304 save_config(); /* and save the updated configuration */
309 * Transfer drive data. Usually called from one of these defines;
310 * #define read_drive(a, b, c, d) driveio (a, b, c, d, B_READ)
311 * #define write_drive(a, b, c, d) driveio (a, b, c, d, B_WRITE)
313 * length and offset are in bytes, but must be multiples of sector
314 * size. The function *does not check* for this condition, and
315 * truncates ruthlessly.
316 * Return error number
319 driveio(struct drive *drive, char *buf, size_t length, off_t offset, int flag)
324 error = 0; /* to keep the compiler happy */
325 while (length) { /* divide into small enough blocks */
326 int len = min(length, MAXBSIZE); /* maximum block device transfer is MAXBSIZE */
328 bp = geteblk(len); /* get a buffer header */
330 bp->b_dev = drive->dev; /* device */
331 bp->b_blkno = offset / drive->partinfo.disklab->d_secsize; /* block number */
332 bp->b_saveaddr = bp->b_data;
335 BUF_STRATEGY(bp, 0); /* initiate the transfer */
337 bp->b_data = bp->b_saveaddr;
338 bp->b_flags |= B_INVAL | B_AGE;
339 bp->b_flags &= ~B_ERROR;
343 length -= len; /* update pointers */
351 * Check a drive for a vinum header. If found,
352 * update the drive information. We come here
353 * with a partially populated drive structure
354 * which includes the device name.
356 * Return information on what we found.
358 * This function is called from two places: check_drive,
359 * which wants to find out whether the drive is a
360 * Vinum drive, and config_drive, which asserts that
361 * it is a vinum drive. In the first case, we don't
362 * print error messages (verbose==0), in the second
363 * we do (verbose==1).
365 enum drive_label_info
366 read_drive_label(struct drive *drive, int verbose)
369 int result; /* result of our search */
370 struct vinum_hdr *vhdr; /* and as header */
372 error = init_drive(drive, 0); /* find the drive */
373 if (error) /* find the drive */
374 return DL_CANT_OPEN; /* not ours */
376 vhdr = (struct vinum_hdr *) Malloc(VINUMHEADERLEN); /* allocate buffers */
377 CHECKALLOC(vhdr, "Can't allocate memory");
379 drive->state = drive_up; /* be optimistic */
380 error = read_drive(drive, (void *) vhdr, VINUMHEADERLEN, VINUM_LABEL_OFFSET);
381 if (vhdr->magic == VINUM_MAGIC) { /* ours! */
382 if (drive->label.name[0] /* we have a name for this drive */
383 &&(strcmp(drive->label.name, vhdr->label.name))) { /* but it doesn't match the real name */
384 drive->lasterror = EINVAL;
385 result = DL_WRONG_DRIVE; /* it's the wrong drive */
386 drive->state = drive_unallocated; /* put it back, it's not ours */
390 * We copy the drive anyway so that we have
391 * the correct name in the drive info. This
392 * may not be the name specified
394 drive->label = vhdr->label; /* put in the label information */
395 } else if (vhdr->magic == VINUM_NOMAGIC) /* was ours, but we gave it away */
396 result = DL_DELETED_LABEL; /* and return the info */
398 result = DL_NOT_OURS; /* we could have it, but we don't yet */
399 Free(vhdr); /* that's all. */
404 * Check a drive for a vinum header. If found,
405 * read configuration information from the drive and
406 * incorporate the data into the configuration.
408 * Return drive number.
411 check_drive(char *devicename)
417 driveno = find_drive_by_dev(devicename, 1); /* if entry doesn't exist, create it */
418 drive = &vinum_conf.drive[driveno]; /* and get a pointer */
420 if (read_drive_label(drive, 0) == DL_OURS) { /* one of ours */
421 for (i = 0; i < vinum_conf.drives_allocated; i++) { /* see if the name already exists */
422 if ((i != driveno) /* not this drive */
423 &&(DRIVE[i].state != drive_unallocated) /* and it's allocated */
424 &&(strcmp(DRIVE[i].label.name,
425 DRIVE[driveno].label.name) == 0)) { /* and it has the same name */
426 struct drive *mydrive = &DRIVE[i];
428 if (mydrive->devicename[0] == '/') { /* we know a device name for it */
430 * set an error, but don't take the
431 * drive down: that would cause unneeded
434 drive->lasterror = EEXIST;
436 } else { /* it's just a place holder, */
439 for (sdno = 0; sdno < vinum_conf.subdisks_allocated; sdno++) { /* look at each subdisk */
440 if ((SD[sdno].driveno == i) /* it's pointing to this one, */
441 &&(SD[sdno].state != sd_unallocated)) { /* and it's a real subdisk */
442 SD[sdno].driveno = drive->driveno; /* point to the one we found */
443 update_sd_state(sdno); /* and update its state */
446 bzero(mydrive, sizeof(struct drive)); /* don't deallocate it, just remove it */
451 if (drive->lasterror == 0)
452 drive->lasterror = ENODEV;
454 drive->state = drive_down;
460 sappend(char *txt, char *s)
462 while ((*s++ = *txt++) != 0);
467 format_config(char *config, int len)
472 char *configend = &config[len];
476 /* First write the volume configuration */
477 for (i = 0; i < vinum_conf.volumes_allocated; i++) {
480 vol = &vinum_conf.volume[i];
481 if ((vol->state > volume_uninit)
482 && (vol->name[0] != '\0')) { /* paranoia */
485 "volume %s state %s",
487 volume_state(vol->state));
489 s++; /* find the end */
490 if (vol->preferred_plex >= 0) /* preferences, */
493 " readpol prefer %s",
494 vinum_conf.plex[vol->preferred_plex].name);
496 s++; /* find the end */
497 s = sappend("\n", s);
501 /* Then the plex configuration */
502 for (i = 0; i < vinum_conf.plexes_allocated; i++) {
505 plex = &vinum_conf.plex[i];
506 if ((plex->state > plex_referenced)
507 && (plex->name[0] != '\0')) { /* paranoia */
510 "plex name %s state %s org %s ",
512 plex_state(plex->state),
513 plex_org(plex->organization));
515 s++; /* find the end */
516 if (isstriped(plex)) {
520 (int) plex->stripesize);
522 s++; /* find the end */
524 if (plex->volno >= 0) /* we have a volume */
528 vinum_conf.volume[plex->volno].name);
530 s++; /* find the end */
531 for (j = 0; j < plex->subdisks; j++) {
535 vinum_conf.sd[plex->sdnos[j]].name);
537 s = sappend("\n", s);
541 /* And finally the subdisk configuration */
542 for (i = 0; i < vinum_conf.subdisks_allocated; i++) {
547 if ((sd->state != sd_referenced)
548 && (sd->state != sd_unallocated)
549 && (sd->name[0] != '\0')) { /* paranoia */
550 drivename = vinum_conf.drive[sd->driveno].label.name;
552 * XXX We've seen cases of dead subdisks
553 * which don't have a drive. If we let them
554 * through here, the drive name is null, so
555 * they get the drive named 'plex'.
557 * This is a breakage limiter, not a fix.
559 if (drivename[0] == '\0')
560 drivename = "*invalid*";
563 "sd name %s drive %s plex %s len %llus driveoffset %llus state %s",
566 vinum_conf.plex[sd->plexno].name,
567 (unsigned long long) sd->sectors,
568 (unsigned long long) sd->driveoffset,
569 sd_state(sd->state));
571 s++; /* find the end */
576 (long long) sd->plexoffset);
578 snprintf(s, configend - s, " detached");
580 s++; /* find the end */
581 if (sd->flags & VF_RETRYERRORS) {
582 snprintf(s, configend - s, " retryerrors");
584 s++; /* find the end */
586 snprintf(s, configend - s, " \n");
588 s++; /* find the end */
591 if (s > &config[len - 2])
592 panic("vinum: configuration data overflow");
596 * issue a save config request to the dæmon. The actual work
597 * is done in process context by daemon_save_config
602 queue_daemon_request(daemonrq_saveconfig, (union daemoninfo) NULL);
606 * Write the configuration to all vinum slices. This
607 * is performed by the dæmon only
610 daemon_save_config(void)
613 int written_config; /* set when we first write the config to disk */
615 struct drive *drive; /* point to current drive info */
616 struct vinum_hdr *vhdr; /* and as header */
617 char *config; /* point to config data */
618 int wlabel_on; /* to set writing label on/off */
620 /* don't save the configuration while we're still working on it */
621 if (vinum_conf.flags & VF_CONFIGURING)
623 written_config = 0; /* no config written yet */
624 /* Build a volume header */
625 vhdr = (struct vinum_hdr *) Malloc(VINUMHEADERLEN); /* get space for the config data */
626 CHECKALLOC(vhdr, "Can't allocate config data");
627 vhdr->magic = VINUM_MAGIC; /* magic number */
628 vhdr->config_length = MAXCONFIG; /* length of following config info */
630 config = Malloc(MAXCONFIG); /* get space for the config data */
631 CHECKALLOC(config, "Can't allocate config data");
633 format_config(config, MAXCONFIG);
634 error = 0; /* no errors yet */
635 for (driveno = 0; driveno < vinum_conf.drives_allocated; driveno++) {
636 drive = &vinum_conf.drive[driveno]; /* point to drive */
637 if (drive->state > drive_referenced) {
638 LOCKDRIVE(drive); /* don't let it change */
641 * First, do some drive consistency checks. Some
642 * of these are kludges, others require a process
643 * context and couldn't be done before
645 if ((drive->devicename[0] == '\0')
646 || (drive->label.name[0] == '\0')) {
648 free_drive(drive); /* get rid of it */
651 if (((drive->flags & VF_OPEN) == 0) /* drive not open */
652 &&(drive->state > drive_down)) { /* and it thinks it's not down */
654 set_drive_state(driveno, drive_down, setstate_force); /* tell it what's what */
657 if ((drive->state == drive_down) /* it's down */
658 &&(drive->flags & VF_OPEN)) { /* but open, */
660 close_drive(drive); /* close it */
661 } else if (drive->state > drive_down) {
662 getmicrotime(&drive->label.last_update); /* time of last update is now */
663 bcopy((char *) &drive->label, /* and the label info from the drive structure */
664 (char *) &vhdr->label,
665 sizeof(vhdr->label));
666 if ((drive->state != drive_unallocated)
667 && (drive->state != drive_referenced)) { /* and it's a real drive */
668 wlabel_on = 1; /* enable writing the label */
669 error = (*devsw(drive->dev)->d_ioctl) (drive->dev, /* make the label writeable */
671 (caddr_t) & wlabel_on,
675 error = write_drive(drive, (char *) vhdr, VINUMHEADERLEN, VINUM_LABEL_OFFSET);
677 error = write_drive(drive, config, MAXCONFIG, VINUM_CONFIG_OFFSET); /* first config copy */
679 error = write_drive(drive, config, MAXCONFIG, VINUM_CONFIG_OFFSET + MAXCONFIG); /* second copy */
680 wlabel_on = 0; /* enable writing the label */
682 error = (*devsw(drive->dev)->d_ioctl) (drive->dev, /* make the label non-writeable again */
684 (caddr_t) & wlabel_on,
690 "vinum: Can't write config to %s, error %d\n",
693 set_drive_state(drive->driveno, drive_down, setstate_force);
695 written_config = 1; /* we've written it on at least one drive */
697 } else /* not worth looking at, */
698 unlockdrive(drive); /* just unlock it again */
706 * Disk labels are a mess. The correct way to
707 * access them is with the DIOC[GSW]DINFO ioctls,
708 * but some programs, such as newfs, access the
709 * disk directly, so we have to write things
710 * there. We do this only on request. If a user
711 * request tries to read it directly, we fake up
716 * get_volume_label returns a label structure to lp, which
717 * is allocated by the caller
720 get_volume_label(char *name, int plexes, u_int64_t size, struct disklabel *lp)
722 bzero(lp, sizeof(struct disklabel));
724 strncpy(lp->d_typename, "vinum", sizeof(lp->d_typename));
725 lp->d_type = DTYPE_VINUM;
726 strncpy(lp->d_packname, name, min(sizeof(lp->d_packname), sizeof(name)));
727 lp->d_rpm = 14400 * plexes; /* to keep them guessing */
728 lp->d_interleave = 1;
732 * A Vinum volume has a single track with all
735 lp->d_secsize = DEV_BSIZE; /* bytes per sector */
736 lp->d_nsectors = size; /* data sectors per track */
737 lp->d_ntracks = 1; /* tracks per cylinder */
738 lp->d_ncylinders = 1; /* data cylinders per unit */
739 lp->d_secpercyl = size; /* data sectors per cylinder */
740 lp->d_secperunit = size; /* data sectors per unit */
742 lp->d_bbsize = BBSIZE;
743 lp->d_sbsize = SBSIZE;
745 lp->d_magic = DISKMAGIC;
746 lp->d_magic2 = DISKMAGIC;
749 * Set up partitions a, b and c to be identical
750 * and the size of the volume. a is UFS, b is
751 * swap, c is nothing.
753 lp->d_partitions[0].p_size = size;
754 lp->d_partitions[0].p_fsize = 1024;
755 lp->d_partitions[0].p_fstype = FS_BSDFFS; /* FreeBSD File System :-) */
756 lp->d_partitions[0].p_fsize = 1024; /* FS fragment size */
757 lp->d_partitions[0].p_frag = 8; /* and fragments per block */
758 lp->d_partitions[SWAP_PART].p_size = size;
759 lp->d_partitions[SWAP_PART].p_fstype = FS_SWAP; /* swap partition */
760 lp->d_partitions[LABEL_PART].p_size = size;
761 lp->d_npartitions = LABEL_PART + 1;
762 strncpy(lp->d_packname, name, min(sizeof(lp->d_packname), sizeof(name)));
763 lp->d_checksum = dkcksum(lp);
766 /* Write a volume label. This implements the VINUM_LABEL ioctl. */
768 write_volume_label(int volno)
770 struct disklabel *lp;
772 struct disklabel *dlp;
776 lp = (struct disklabel *) Malloc((sizeof(struct disklabel) + (DEV_BSIZE - 1)) & (DEV_BSIZE - 1));
780 if ((unsigned) (volno) >= (unsigned) vinum_conf.volumes_allocated) /* invalid volume */
783 vol = &VOL[volno]; /* volume in question */
784 if (vol->state <= volume_uninit) /* nothing there */
786 else if (vol->state < volume_up) /* not accessible */
787 return EIO; /* I/O error */
789 get_volume_label(vol->name, vol->plexes, vol->size, lp); /* get the label */
792 * Now write to disk. This code is derived from the
793 * system writedisklabel (), which does silly things
794 * like reading the label and refusing to write
795 * unless it's already there.
797 bp = geteblk((int) lp->d_secsize); /* get a buffer */
798 bp->b_dev = makedev(VINUM_CDEV_MAJOR, vol->volno); /* our own raw volume */
799 bp->b_blkno = LABELSECTOR * ((int) lp->d_secsize / DEV_BSIZE);
800 bp->b_bcount = lp->d_secsize;
801 bzero(bp->b_data, lp->d_secsize);
802 dlp = (struct disklabel *) bp->b_data;
804 bp->b_flags &= ~B_INVAL;
805 bp->b_flags |= B_WRITE;
810 * vinumstrategy (bp);
812 * Negotiate with phk to get it fixed.
816 bp->b_flags |= B_INVAL | B_AGE;
817 bp->b_flags &= ~B_ERROR;
823 /* Look at all disks on the system for vinum slices */
825 vinum_scandisk(char *devicename[], int drives)
827 struct drive *volatile drive;
828 volatile int driveno;
829 int firstdrive; /* first drive in this list */
830 volatile int gooddrives; /* number of usable drives found */
831 int firsttime; /* set if we have never configured before */
833 char *config_text; /* read the config info from disk into here */
834 char *volatile cptr; /* pointer into config information */
835 char *eptr; /* end pointer into config information */
836 char *config_line; /* copy the config line to */
838 int *volatile drivelist; /* list of drive indices */
839 #define DRIVENAMELEN 64
840 #define DRIVEPARTS 35 /* max partitions per drive, excluding c */
841 char partname[DRIVENAMELEN]; /* for creating partition names */
843 status = 0; /* success indication */
844 vinum_conf.flags |= VF_READING_CONFIG; /* reading config from disk */
846 gooddrives = 0; /* number of usable drives found */
847 firstdrive = vinum_conf.drives_used; /* the first drive */
848 firsttime = vinum_conf.drives_used == 0; /* are we a virgin? */
850 /* allocate a drive pointer list */
851 drivelist = (int *) Malloc(drives * DRIVEPARTS * sizeof(int));
852 CHECKALLOC(drivelist, "Can't allocate memory");
854 /* Open all drives and find which was modified most recently */
855 for (driveno = 0; driveno < drives; driveno++) {
856 char part; /* UNIX partition */
858 int founddrive; /* flag when we find a vinum drive */
860 founddrive = 0; /* no vinum drive found yet on this spindle */
861 /* first try the partition table */
862 for (slice = 1; slice < 5; slice++)
863 for (part = 'a'; part < 'i'; part++) {
864 if (part != 'c') { /* don't do the c partition */
871 drive = check_drive(partname); /* try to open it */
872 if ((drive->lasterror != 0) /* didn't work, */
873 ||(drive->state != drive_up))
874 free_drive(drive); /* get rid of it */
875 else if (drive->flags & VF_CONFIGURED) /* already read this config, */
877 "vinum: already read config from %s\n", /* say so */
880 drivelist[gooddrives] = drive->driveno; /* keep the drive index */
881 drive->flags &= ~VF_NEWBORN; /* which is no longer newly born */
887 if (founddrive == 0) { /* didn't find anything, */
888 for (part = 'a'; part < 'i'; part++) /* try the compatibility partition */
889 if (part != 'c') { /* don't do the c partition */
890 snprintf(partname, /* /dev/sd0a */
895 drive = check_drive(partname); /* try to open it */
896 if ((drive->lasterror != 0) /* didn't work, */
897 ||(drive->state != drive_up))
898 free_drive(drive); /* get rid of it */
899 else if (drive->flags & VF_CONFIGURED) /* already read this config, */
901 "vinum: already read config from %s\n", /* say so */
904 drivelist[gooddrives] = drive->driveno; /* keep the drive index */
905 drive->flags &= ~VF_NEWBORN; /* which is no longer newly born */
912 if (gooddrives == 0) {
914 log(LOG_WARNING, "vinum: no drives found\n");
916 log(LOG_INFO, "vinum: no additional drives found\n");
920 * We now have at least one drive
921 * open. Sort them in order of config time
922 * and merge the config info with what we
925 qsort(drivelist, gooddrives, sizeof(int), drivecmp);
926 config_text = (char *) Malloc(MAXCONFIG * 2); /* allocate buffers */
927 CHECKALLOC(config_text, "Can't allocate memory");
928 config_line = (char *) Malloc(MAXCONFIGLINE * 2); /* allocate buffers */
929 CHECKALLOC(config_line, "Can't allocate memory");
930 for (driveno = 0; driveno < gooddrives; driveno++) { /* now include the config */
931 drive = &DRIVE[drivelist[driveno]]; /* point to the drive */
933 if (firsttime && (driveno == 0)) /* we've never configured before, */
934 log(LOG_INFO, "vinum: reading configuration from %s\n", drive->devicename);
936 log(LOG_INFO, "vinum: updating configuration from %s\n", drive->devicename);
938 if (drive->state == drive_up)
939 /* Read in both copies of the configuration information */
940 error = read_drive(drive, config_text, MAXCONFIG * 2, VINUM_CONFIG_OFFSET);
943 printf("vinum_scandisk: %s is %s\n", drive->devicename, drive_state(drive->state));
947 log(LOG_ERR, "vinum: Can't read device %s, error %d\n", drive->devicename, error);
948 free_drive(drive); /* give it back */
952 * At this point, check that the two copies
953 * are the same, and do something useful if
954 * not. In particular, consider which is
955 * newer, and what this means for the
956 * integrity of the data on the drive.
959 vinum_conf.drives_used++; /* another drive in use */
960 /* Parse the configuration, and add it to the global configuration */
961 for (cptr = config_text; *cptr != '\0';) { /* love this style(9) */
962 volatile int parse_status; /* return value from parse_config */
964 for (eptr = config_line; (*cptr != '\n') && (*cptr != '\0');) /* until the end of the line */
966 *eptr = '\0'; /* and delimit */
967 if (setjmp(command_fail) == 0) { /* come back here on error and continue */
968 parse_status = parse_config(config_line, &keyword_set, 1); /* parse the config line */
969 if (parse_status < 0) { /* error in config */
971 * This config should have been parsed in user
972 * space. If we run into problems here, something
973 * serious is afoot. Complain and let the user
974 * snarf the config to see what's wrong.
977 "vinum: Config error on %s, aborting integration\n",
979 free_drive(drive); /* give it back */
983 while (*cptr == '\n')
984 cptr++; /* skip to next line */
987 drive->flags |= VF_CONFIGURED; /* read this drive's configuration */
992 vinum_conf.flags &= ~VF_READING_CONFIG; /* no longer reading from disk */
994 printf("vinum: couldn't read configuration");
996 updateconfig(VF_READING_CONFIG); /* update from disk config */
1001 * Compare the modification dates of the drives, for qsort.
1002 * Return 1 if a < b, 0 if a == b, 01 if a > b: in other
1003 * words, sort backwards.
1006 drivecmp(const void *va, const void *vb)
1008 const struct drive *a = &DRIVE[*(const int *) va];
1009 const struct drive *b = &DRIVE[*(const int *) vb];
1011 if ((a->label.last_update.tv_sec == b->label.last_update.tv_sec)
1012 && (a->label.last_update.tv_usec == b->label.last_update.tv_usec))
1014 else if ((a->label.last_update.tv_sec > b->label.last_update.tv_sec)
1015 || ((a->label.last_update.tv_sec == b->label.last_update.tv_sec)
1016 && (a->label.last_update.tv_usec > b->label.last_update.tv_usec)))
1021 /* Local Variables: */
1022 /* fill-column: 50 */