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 1.5 2003/08/07 21:17:09 dillon Exp $
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 */
60 if (bcmp(drive->devicename, "/dev/", 5)) /* device name doesn't start with /dev */
61 return ENOENT; /* give up */
62 if (drive->flags & VF_OPEN) /* open already, */
63 return EBUSY; /* don't do it again */
66 * Yes, Bruce, I know this is horrible, but we
67 * don't have a root file system when we first
68 * try to do this. If you can come up with a
69 * better solution, I'd really like it. I'm
70 * just putting it in now to add ammuntion to
71 * moving the system to devfs.
73 dname = &drive->devicename[5];
74 drive->dev = NULL; /* no device yet */
77 if (bcmp(dname, "ad", 2) == 0) /* IDE disk */
79 else if (bcmp(dname, "wd", 2) == 0) /* IDE disk */
81 else if (bcmp(dname, "da", 2) == 0)
83 else if (bcmp(dname, "vn", 2) == 0)
85 else if (bcmp(dname, "md", 2) == 0)
87 else if (bcmp(dname, "amrd", 4) == 0) {
90 } else if (bcmp(dname, "mlxd", 4) == 0) {
93 } else if (bcmp(dname, "idad", 4) == 0) {
96 } else if (bcmp(dname, "twed", 4) == 0) { /* 3ware raid */
101 dname += 2; /* point past */
104 * Found the device. We can expect one of
105 * two formats for the rest: a unit number,
106 * then either a partition letter for the
107 * compatiblity partition (e.g. h) or a
108 * slice ID and partition (e.g. s2e).
109 * Create a minor number for each of them.
112 while ((*dname >= '0') /* unit number */
114 unit = unit * 10 + *dname - '0';
118 if (*dname == 's') { /* slice */
119 if (((dname[1] < '1') || (dname[1] > '4')) /* invalid slice */
120 ||((dname[2] < 'a') || (dname[2] > 'h'))) /* or invalid partition */
122 devminor = ((unit & 31) << 3) /* unit */
123 +(dname[2] - 'a') /* partition */
124 +((dname[1] - '0' + 1) << 16) /* slice */
125 +((unit & ~31) << 16); /* high-order unit bits */
126 } else { /* compatibility partition */
127 if ((*dname < 'a') || (*dname > 'h')) /* or invalid partition */
129 devminor = (*dname - 'a') /* partition */
130 +((unit & 31) << 3) /* unit */
131 +((unit & ~31) << 16); /* high-order unit bits */
134 if ((devminor & 7) == 2) /* partition c */
135 return ENOTTY; /* not buying that */
137 drive->dev = makedev(devmajor, devminor); /* find the device */
138 if (drive->dev == NULL) /* didn't find anything */
141 drive->dev->si_iosize_max = DFLTPHYS;
142 if (dev_dport(drive->dev) == NULL)
143 drive->lasterror = ENOENT;
145 drive->lasterror = dev_dopen(drive->dev, FWRITE, 0, NULL);
147 if (drive->lasterror != 0) { /* failed */
148 drive->state = drive_down; /* just force it down */
151 "vinum open_drive %s: failed with error %d\n",
152 drive->devicename, drive->lasterror);
154 drive->flags |= VF_OPEN; /* we're open now */
156 return drive->lasterror;
160 * Set some variables in the drive struct
161 * in more convenient form. Return error indication
164 set_drive_parms(struct drive *drive)
166 drive->blocksize = BLKDEV_IOSIZE; /* do we need this? */
167 drive->secsperblock = drive->blocksize /* number of sectors per block */
168 / drive->partinfo.disklab->d_secsize;
170 /* Now update the label part */
171 bcopy(hostname, drive->label.sysname, VINUMHOSTNAMELEN); /* put in host name */
172 getmicrotime(&drive->label.date_of_birth); /* and current time */
173 drive->label.drive_size = ((u_int64_t) drive->partinfo.part->p_size) /* size of the drive in bytes */
174 *((u_int64_t) drive->partinfo.disklab->d_secsize);
176 if (debug & DEBUG_BIGDRIVE) /* pretend we're 100 times as big */
177 drive->label.drive_size *= 100;
180 /* number of sectors available for subdisks */
181 drive->sectors_available = drive->label.drive_size / DEV_BSIZE - DATASTART;
184 * Bug in 3.0 as of January 1998: you can open
185 * non-existent slices. They have a length of 0.
187 if (drive->label.drive_size < MINVINUMSLICE) { /* too small to worry about */
188 set_drive_state(drive->driveno, drive_down, setstate_force);
189 drive->lasterror = ENOSPC;
192 drive->freelist_size = INITIAL_DRIVE_FREELIST; /* initial number of entries */
193 drive->freelist = (struct drive_freelist *)
194 Malloc(INITIAL_DRIVE_FREELIST * sizeof(struct drive_freelist));
195 if (drive->freelist == NULL) /* can't malloc, dammit */
197 drive->freelist_entries = 1; /* just (almost) the complete drive */
198 drive->freelist[0].offset = DATASTART; /* starts here */
199 drive->freelist[0].sectors = (drive->label.drive_size >> DEV_BSHIFT) - DATASTART; /* and it's this long */
200 if (drive->label.name[0] != '\0') /* got a name */
201 set_drive_state(drive->driveno, drive_up, setstate_force); /* our drive is accessible */
202 else /* we know about it, but that's all */
203 drive->state = drive_referenced;
208 * Initialize a drive: open the device and add device
212 init_drive(struct drive *drive, int verbose)
214 if (drive->devicename[0] != '/') {
215 drive->lasterror = EINVAL;
216 log(LOG_ERR, "vinum: Can't open drive without drive name\n");
219 drive->lasterror = open_drive(drive, curproc, verbose); /* open the drive */
220 if (drive->lasterror)
221 return drive->lasterror;
223 drive->lasterror = dev_dioctl(
226 (caddr_t) & drive->partinfo,
229 if (drive->lasterror) {
232 "vinum open_drive %s: Can't get partition information, drive->lasterror %d\n",
236 return drive->lasterror;
238 if (drive->partinfo.part->p_fstype != FS_VINUM) { /* not Vinum */
239 drive->lasterror = EFTYPE;
242 "vinum open_drive %s: Wrong partition type for vinum\n",
247 return set_drive_parms(drive); /* set various odds and ends */
250 /* Close a drive if it's open. */
252 close_drive(struct drive *drive)
254 LOCKDRIVE(drive); /* keep the daemon out */
255 if (drive->flags & VF_OPEN)
256 close_locked_drive(drive); /* and close it */
257 if (drive->state > drive_down) /* if it's up */
258 drive->state = drive_down; /* make sure it's down */
263 * Real drive close code, called with drive already locked.
264 * We have also checked that the drive is open. No errors.
267 close_locked_drive(struct drive *drive)
270 * If we can't access the drive, we can't flush
271 * the queues, which spec_close() will try to
272 * do. Get rid of them here first.
274 drive->lasterror = dev_dclose(drive->dev, 0, 0, NULL);
275 drive->flags &= ~VF_OPEN; /* no longer open */
279 * Remove drive from the configuration.
280 * Caller must ensure that it isn't active.
283 remove_drive(int driveno)
285 struct drive *drive = &vinum_conf.drive[driveno];
286 struct vinum_hdr *vhdr; /* buffer for header */
289 if (drive->state > drive_referenced) { /* real drive */
290 if (drive->state == drive_up) {
291 vhdr = (struct vinum_hdr *) Malloc(VINUMHEADERLEN); /* allocate buffer */
292 CHECKALLOC(vhdr, "Can't allocate memory");
293 error = read_drive(drive, (void *) vhdr, VINUMHEADERLEN, VINUM_LABEL_OFFSET);
295 drive->lasterror = error;
297 vhdr->magic = VINUM_NOMAGIC; /* obliterate the magic, but leave the rest */
298 write_drive(drive, (void *) vhdr, VINUMHEADERLEN, VINUM_LABEL_OFFSET);
302 free_drive(drive); /* close it and free resources */
303 save_config(); /* and save the updated configuration */
308 * Transfer drive data. Usually called from one of these defines;
309 * #define read_drive(a, b, c, d) driveio (a, b, c, d, B_READ)
310 * #define write_drive(a, b, c, d) driveio (a, b, c, d, B_WRITE)
312 * length and offset are in bytes, but must be multiples of sector
313 * size. The function *does not check* for this condition, and
314 * truncates ruthlessly.
315 * Return error number
318 driveio(struct drive *drive, char *buf, size_t length, off_t offset, int flag)
323 error = 0; /* to keep the compiler happy */
324 while (length) { /* divide into small enough blocks */
325 int len = min(length, MAXBSIZE); /* maximum block device transfer is MAXBSIZE */
327 bp = geteblk(len); /* get a buffer header */
329 bp->b_dev = drive->dev; /* device */
330 bp->b_blkno = offset / drive->partinfo.disklab->d_secsize; /* block number */
331 bp->b_saveaddr = bp->b_data;
334 BUF_STRATEGY(bp, 0); /* initiate the transfer */
336 bp->b_data = bp->b_saveaddr;
337 bp->b_flags |= B_INVAL | B_AGE;
338 bp->b_flags &= ~B_ERROR;
342 length -= len; /* update pointers */
350 * Check a drive for a vinum header. If found,
351 * update the drive information. We come here
352 * with a partially populated drive structure
353 * which includes the device name.
355 * Return information on what we found.
357 * This function is called from two places: check_drive,
358 * which wants to find out whether the drive is a
359 * Vinum drive, and config_drive, which asserts that
360 * it is a vinum drive. In the first case, we don't
361 * print error messages (verbose==0), in the second
362 * we do (verbose==1).
364 enum drive_label_info
365 read_drive_label(struct drive *drive, int verbose)
368 int result; /* result of our search */
369 struct vinum_hdr *vhdr; /* and as header */
371 error = init_drive(drive, 0); /* find the drive */
372 if (error) /* find the drive */
373 return DL_CANT_OPEN; /* not ours */
375 vhdr = (struct vinum_hdr *) Malloc(VINUMHEADERLEN); /* allocate buffers */
376 CHECKALLOC(vhdr, "Can't allocate memory");
378 drive->state = drive_up; /* be optimistic */
379 error = read_drive(drive, (void *) vhdr, VINUMHEADERLEN, VINUM_LABEL_OFFSET);
380 if (vhdr->magic == VINUM_MAGIC) { /* ours! */
381 if (drive->label.name[0] /* we have a name for this drive */
382 &&(strcmp(drive->label.name, vhdr->label.name))) { /* but it doesn't match the real name */
383 drive->lasterror = EINVAL;
384 result = DL_WRONG_DRIVE; /* it's the wrong drive */
385 drive->state = drive_unallocated; /* put it back, it's not ours */
389 * We copy the drive anyway so that we have
390 * the correct name in the drive info. This
391 * may not be the name specified
393 drive->label = vhdr->label; /* put in the label information */
394 } else if (vhdr->magic == VINUM_NOMAGIC) /* was ours, but we gave it away */
395 result = DL_DELETED_LABEL; /* and return the info */
397 result = DL_NOT_OURS; /* we could have it, but we don't yet */
398 Free(vhdr); /* that's all. */
403 * Check a drive for a vinum header. If found,
404 * read configuration information from the drive and
405 * incorporate the data into the configuration.
407 * Return drive number.
410 check_drive(char *devicename)
416 driveno = find_drive_by_dev(devicename, 1); /* if entry doesn't exist, create it */
417 drive = &vinum_conf.drive[driveno]; /* and get a pointer */
419 if (read_drive_label(drive, 0) == DL_OURS) { /* one of ours */
420 for (i = 0; i < vinum_conf.drives_allocated; i++) { /* see if the name already exists */
421 if ((i != driveno) /* not this drive */
422 &&(DRIVE[i].state != drive_unallocated) /* and it's allocated */
423 &&(strcmp(DRIVE[i].label.name,
424 DRIVE[driveno].label.name) == 0)) { /* and it has the same name */
425 struct drive *mydrive = &DRIVE[i];
427 if (mydrive->devicename[0] == '/') { /* we know a device name for it */
429 * set an error, but don't take the
430 * drive down: that would cause unneeded
433 drive->lasterror = EEXIST;
435 } else { /* it's just a place holder, */
438 for (sdno = 0; sdno < vinum_conf.subdisks_allocated; sdno++) { /* look at each subdisk */
439 if ((SD[sdno].driveno == i) /* it's pointing to this one, */
440 &&(SD[sdno].state != sd_unallocated)) { /* and it's a real subdisk */
441 SD[sdno].driveno = drive->driveno; /* point to the one we found */
442 update_sd_state(sdno); /* and update its state */
445 bzero(mydrive, sizeof(struct drive)); /* don't deallocate it, just remove it */
450 if (drive->lasterror == 0)
451 drive->lasterror = ENODEV;
453 drive->state = drive_down;
459 sappend(char *txt, char *s)
461 while ((*s++ = *txt++) != 0);
466 format_config(char *config, int len)
471 char *configend = &config[len];
475 /* First write the volume configuration */
476 for (i = 0; i < vinum_conf.volumes_allocated; i++) {
479 vol = &vinum_conf.volume[i];
480 if ((vol->state > volume_uninit)
481 && (vol->name[0] != '\0')) { /* paranoia */
484 "volume %s state %s",
486 volume_state(vol->state));
488 s++; /* find the end */
489 if (vol->preferred_plex >= 0) /* preferences, */
492 " readpol prefer %s",
493 vinum_conf.plex[vol->preferred_plex].name);
495 s++; /* find the end */
496 s = sappend("\n", s);
500 /* Then the plex configuration */
501 for (i = 0; i < vinum_conf.plexes_allocated; i++) {
504 plex = &vinum_conf.plex[i];
505 if ((plex->state > plex_referenced)
506 && (plex->name[0] != '\0')) { /* paranoia */
509 "plex name %s state %s org %s ",
511 plex_state(plex->state),
512 plex_org(plex->organization));
514 s++; /* find the end */
515 if (isstriped(plex)) {
519 (int) plex->stripesize);
521 s++; /* find the end */
523 if (plex->volno >= 0) /* we have a volume */
527 vinum_conf.volume[plex->volno].name);
529 s++; /* find the end */
530 for (j = 0; j < plex->subdisks; j++) {
534 vinum_conf.sd[plex->sdnos[j]].name);
536 s = sappend("\n", s);
540 /* And finally the subdisk configuration */
541 for (i = 0; i < vinum_conf.subdisks_allocated; i++) {
546 if ((sd->state != sd_referenced)
547 && (sd->state != sd_unallocated)
548 && (sd->name[0] != '\0')) { /* paranoia */
549 drivename = vinum_conf.drive[sd->driveno].label.name;
551 * XXX We've seen cases of dead subdisks
552 * which don't have a drive. If we let them
553 * through here, the drive name is null, so
554 * they get the drive named 'plex'.
556 * This is a breakage limiter, not a fix.
558 if (drivename[0] == '\0')
559 drivename = "*invalid*";
562 "sd name %s drive %s plex %s len %llus driveoffset %llus state %s",
565 vinum_conf.plex[sd->plexno].name,
566 (unsigned long long) sd->sectors,
567 (unsigned long long) sd->driveoffset,
568 sd_state(sd->state));
570 s++; /* find the end */
575 (long long) sd->plexoffset);
577 snprintf(s, configend - s, " detached");
579 s++; /* find the end */
580 if (sd->flags & VF_RETRYERRORS) {
581 snprintf(s, configend - s, " retryerrors");
583 s++; /* find the end */
585 snprintf(s, configend - s, " \n");
587 s++; /* find the end */
590 if (s > &config[len - 2])
591 panic("vinum: configuration data overflow");
595 * issue a save config request to the dæmon. The actual work
596 * is done in process context by daemon_save_config
601 queue_daemon_request(daemonrq_saveconfig, (union daemoninfo) NULL);
605 * Write the configuration to all vinum slices. This
606 * is performed by the dæmon only
609 daemon_save_config(void)
612 int written_config; /* set when we first write the config to disk */
614 struct drive *drive; /* point to current drive info */
615 struct vinum_hdr *vhdr; /* and as header */
616 char *config; /* point to config data */
617 int wlabel_on; /* to set writing label on/off */
619 /* don't save the configuration while we're still working on it */
620 if (vinum_conf.flags & VF_CONFIGURING)
622 written_config = 0; /* no config written yet */
623 /* Build a volume header */
624 vhdr = (struct vinum_hdr *) Malloc(VINUMHEADERLEN); /* get space for the config data */
625 CHECKALLOC(vhdr, "Can't allocate config data");
626 vhdr->magic = VINUM_MAGIC; /* magic number */
627 vhdr->config_length = MAXCONFIG; /* length of following config info */
629 config = Malloc(MAXCONFIG); /* get space for the config data */
630 CHECKALLOC(config, "Can't allocate config data");
632 format_config(config, MAXCONFIG);
633 error = 0; /* no errors yet */
634 for (driveno = 0; driveno < vinum_conf.drives_allocated; driveno++) {
635 drive = &vinum_conf.drive[driveno]; /* point to drive */
636 if (drive->state > drive_referenced) {
637 LOCKDRIVE(drive); /* don't let it change */
640 * First, do some drive consistency checks. Some
641 * of these are kludges, others require a process
642 * context and couldn't be done before
644 if ((drive->devicename[0] == '\0')
645 || (drive->label.name[0] == '\0')) {
647 free_drive(drive); /* get rid of it */
650 if (((drive->flags & VF_OPEN) == 0) /* drive not open */
651 &&(drive->state > drive_down)) { /* and it thinks it's not down */
653 set_drive_state(driveno, drive_down, setstate_force); /* tell it what's what */
656 if ((drive->state == drive_down) /* it's down */
657 &&(drive->flags & VF_OPEN)) { /* but open, */
659 close_drive(drive); /* close it */
660 } else if (drive->state > drive_down) {
661 getmicrotime(&drive->label.last_update); /* time of last update is now */
662 bcopy((char *) &drive->label, /* and the label info from the drive structure */
663 (char *) &vhdr->label,
664 sizeof(vhdr->label));
665 if ((drive->state != drive_unallocated)
666 && (drive->state != drive_referenced)) { /* and it's a real drive */
667 wlabel_on = 1; /* enable writing the label */
668 error = dev_dioctl(drive->dev, /* make the label writeable */
670 (caddr_t) & wlabel_on,
674 error = write_drive(drive, (char *) vhdr, VINUMHEADERLEN, VINUM_LABEL_OFFSET);
676 error = write_drive(drive, config, MAXCONFIG, VINUM_CONFIG_OFFSET); /* first config copy */
678 error = write_drive(drive, config, MAXCONFIG, VINUM_CONFIG_OFFSET + MAXCONFIG); /* second copy */
679 wlabel_on = 0; /* enable writing the label */
681 error = dev_dioctl(drive->dev, /* make the label non-writeable again */
683 (caddr_t) & wlabel_on,
689 "vinum: Can't write config to %s, error %d\n",
692 set_drive_state(drive->driveno, drive_down, setstate_force);
694 written_config = 1; /* we've written it on at least one drive */
696 } else /* not worth looking at, */
697 unlockdrive(drive); /* just unlock it again */
705 * Disk labels are a mess. The correct way to
706 * access them is with the DIOC[GSW]DINFO ioctls,
707 * but some programs, such as newfs, access the
708 * disk directly, so we have to write things
709 * there. We do this only on request. If a user
710 * request tries to read it directly, we fake up
715 * get_volume_label returns a label structure to lp, which
716 * is allocated by the caller
719 get_volume_label(char *name, int plexes, u_int64_t size, struct disklabel *lp)
721 bzero(lp, sizeof(struct disklabel));
723 strncpy(lp->d_typename, "vinum", sizeof(lp->d_typename));
724 lp->d_type = DTYPE_VINUM;
725 strncpy(lp->d_packname, name, min(sizeof(lp->d_packname), sizeof(name)));
726 lp->d_rpm = 14400 * plexes; /* to keep them guessing */
727 lp->d_interleave = 1;
731 * A Vinum volume has a single track with all
734 lp->d_secsize = DEV_BSIZE; /* bytes per sector */
735 lp->d_nsectors = size; /* data sectors per track */
736 lp->d_ntracks = 1; /* tracks per cylinder */
737 lp->d_ncylinders = 1; /* data cylinders per unit */
738 lp->d_secpercyl = size; /* data sectors per cylinder */
739 lp->d_secperunit = size; /* data sectors per unit */
741 lp->d_bbsize = BBSIZE;
742 lp->d_sbsize = SBSIZE;
744 lp->d_magic = DISKMAGIC;
745 lp->d_magic2 = DISKMAGIC;
748 * Set up partitions a, b and c to be identical
749 * and the size of the volume. a is UFS, b is
750 * swap, c is nothing.
752 lp->d_partitions[0].p_size = size;
753 lp->d_partitions[0].p_fsize = 1024;
754 lp->d_partitions[0].p_fstype = FS_BSDFFS; /* FreeBSD File System :-) */
755 lp->d_partitions[0].p_fsize = 1024; /* FS fragment size */
756 lp->d_partitions[0].p_frag = 8; /* and fragments per block */
757 lp->d_partitions[SWAP_PART].p_size = size;
758 lp->d_partitions[SWAP_PART].p_fstype = FS_SWAP; /* swap partition */
759 lp->d_partitions[LABEL_PART].p_size = size;
760 lp->d_npartitions = LABEL_PART + 1;
761 strncpy(lp->d_packname, name, min(sizeof(lp->d_packname), sizeof(name)));
762 lp->d_checksum = dkcksum(lp);
765 /* Write a volume label. This implements the VINUM_LABEL ioctl. */
767 write_volume_label(int volno)
769 struct disklabel *lp;
771 struct disklabel *dlp;
775 lp = (struct disklabel *) Malloc((sizeof(struct disklabel) + (DEV_BSIZE - 1)) & (DEV_BSIZE - 1));
779 if ((unsigned) (volno) >= (unsigned) vinum_conf.volumes_allocated) /* invalid volume */
782 vol = &VOL[volno]; /* volume in question */
783 if (vol->state <= volume_uninit) /* nothing there */
785 else if (vol->state < volume_up) /* not accessible */
786 return EIO; /* I/O error */
788 get_volume_label(vol->name, vol->plexes, vol->size, lp); /* get the label */
791 * Now write to disk. This code is derived from the
792 * system writedisklabel (), which does silly things
793 * like reading the label and refusing to write
794 * unless it's already there.
796 bp = geteblk((int) lp->d_secsize); /* get a buffer */
797 bp->b_dev = makedev(VINUM_CDEV_MAJOR, vol->volno); /* our own raw volume */
798 bp->b_blkno = LABELSECTOR * ((int) lp->d_secsize / DEV_BSIZE);
799 bp->b_bcount = lp->d_secsize;
800 bzero(bp->b_data, lp->d_secsize);
801 dlp = (struct disklabel *) bp->b_data;
803 bp->b_flags &= ~B_INVAL;
804 bp->b_flags |= B_WRITE;
809 * vinumstrategy (bp);
811 * Negotiate with phk to get it fixed.
815 bp->b_flags |= B_INVAL | B_AGE;
816 bp->b_flags &= ~B_ERROR;
822 /* Look at all disks on the system for vinum slices */
824 vinum_scandisk(char *devicename[], int drives)
826 struct drive *volatile drive;
827 volatile int driveno;
828 int firstdrive; /* first drive in this list */
829 volatile int gooddrives; /* number of usable drives found */
830 int firsttime; /* set if we have never configured before */
832 char *config_text; /* read the config info from disk into here */
833 char *volatile cptr; /* pointer into config information */
834 char *eptr; /* end pointer into config information */
835 char *config_line; /* copy the config line to */
837 int *volatile drivelist; /* list of drive indices */
838 #define DRIVENAMELEN 64
839 #define DRIVEPARTS 35 /* max partitions per drive, excluding c */
840 char partname[DRIVENAMELEN]; /* for creating partition names */
842 status = 0; /* success indication */
843 vinum_conf.flags |= VF_READING_CONFIG; /* reading config from disk */
845 gooddrives = 0; /* number of usable drives found */
846 firstdrive = vinum_conf.drives_used; /* the first drive */
847 firsttime = vinum_conf.drives_used == 0; /* are we a virgin? */
849 /* allocate a drive pointer list */
850 drivelist = (int *) Malloc(drives * DRIVEPARTS * sizeof(int));
851 CHECKALLOC(drivelist, "Can't allocate memory");
853 /* Open all drives and find which was modified most recently */
854 for (driveno = 0; driveno < drives; driveno++) {
855 char part; /* UNIX partition */
857 int founddrive; /* flag when we find a vinum drive */
859 founddrive = 0; /* no vinum drive found yet on this spindle */
860 /* first try the partition table */
861 for (slice = 1; slice < 5; slice++)
862 for (part = 'a'; part < 'i'; part++) {
863 if (part != 'c') { /* don't do the c partition */
870 drive = check_drive(partname); /* try to open it */
871 if ((drive->lasterror != 0) /* didn't work, */
872 ||(drive->state != drive_up))
873 free_drive(drive); /* get rid of it */
874 else if (drive->flags & VF_CONFIGURED) /* already read this config, */
876 "vinum: already read config from %s\n", /* say so */
879 drivelist[gooddrives] = drive->driveno; /* keep the drive index */
880 drive->flags &= ~VF_NEWBORN; /* which is no longer newly born */
886 if (founddrive == 0) { /* didn't find anything, */
887 for (part = 'a'; part < 'i'; part++) /* try the compatibility partition */
888 if (part != 'c') { /* don't do the c partition */
889 snprintf(partname, /* /dev/sd0a */
894 drive = check_drive(partname); /* try to open it */
895 if ((drive->lasterror != 0) /* didn't work, */
896 ||(drive->state != drive_up))
897 free_drive(drive); /* get rid of it */
898 else if (drive->flags & VF_CONFIGURED) /* already read this config, */
900 "vinum: already read config from %s\n", /* say so */
903 drivelist[gooddrives] = drive->driveno; /* keep the drive index */
904 drive->flags &= ~VF_NEWBORN; /* which is no longer newly born */
911 if (gooddrives == 0) {
913 log(LOG_WARNING, "vinum: no drives found\n");
915 log(LOG_INFO, "vinum: no additional drives found\n");
919 * We now have at least one drive
920 * open. Sort them in order of config time
921 * and merge the config info with what we
924 qsort(drivelist, gooddrives, sizeof(int), drivecmp);
925 config_text = (char *) Malloc(MAXCONFIG * 2); /* allocate buffers */
926 CHECKALLOC(config_text, "Can't allocate memory");
927 config_line = (char *) Malloc(MAXCONFIGLINE * 2); /* allocate buffers */
928 CHECKALLOC(config_line, "Can't allocate memory");
929 for (driveno = 0; driveno < gooddrives; driveno++) { /* now include the config */
930 drive = &DRIVE[drivelist[driveno]]; /* point to the drive */
932 if (firsttime && (driveno == 0)) /* we've never configured before, */
933 log(LOG_INFO, "vinum: reading configuration from %s\n", drive->devicename);
935 log(LOG_INFO, "vinum: updating configuration from %s\n", drive->devicename);
937 if (drive->state == drive_up)
938 /* Read in both copies of the configuration information */
939 error = read_drive(drive, config_text, MAXCONFIG * 2, VINUM_CONFIG_OFFSET);
942 printf("vinum_scandisk: %s is %s\n", drive->devicename, drive_state(drive->state));
946 log(LOG_ERR, "vinum: Can't read device %s, error %d\n", drive->devicename, error);
947 free_drive(drive); /* give it back */
951 * At this point, check that the two copies
952 * are the same, and do something useful if
953 * not. In particular, consider which is
954 * newer, and what this means for the
955 * integrity of the data on the drive.
958 vinum_conf.drives_used++; /* another drive in use */
959 /* Parse the configuration, and add it to the global configuration */
960 for (cptr = config_text; *cptr != '\0';) { /* love this style(9) */
961 volatile int parse_status; /* return value from parse_config */
963 for (eptr = config_line; (*cptr != '\n') && (*cptr != '\0');) /* until the end of the line */
965 *eptr = '\0'; /* and delimit */
966 if (setjmp(command_fail) == 0) { /* come back here on error and continue */
967 parse_status = parse_config(config_line, &keyword_set, 1); /* parse the config line */
968 if (parse_status < 0) { /* error in config */
970 * This config should have been parsed in user
971 * space. If we run into problems here, something
972 * serious is afoot. Complain and let the user
973 * snarf the config to see what's wrong.
976 "vinum: Config error on %s, aborting integration\n",
978 free_drive(drive); /* give it back */
982 while (*cptr == '\n')
983 cptr++; /* skip to next line */
986 drive->flags |= VF_CONFIGURED; /* read this drive's configuration */
991 vinum_conf.flags &= ~VF_READING_CONFIG; /* no longer reading from disk */
993 printf("vinum: couldn't read configuration");
995 updateconfig(VF_READING_CONFIG); /* update from disk config */
1000 * Compare the modification dates of the drives, for qsort.
1001 * Return 1 if a < b, 0 if a == b, 01 if a > b: in other
1002 * words, sort backwards.
1005 drivecmp(const void *va, const void *vb)
1007 const struct drive *a = &DRIVE[*(const int *) va];
1008 const struct drive *b = &DRIVE[*(const int *) vb];
1010 if ((a->label.last_update.tv_sec == b->label.last_update.tv_sec)
1011 && (a->label.last_update.tv_usec == b->label.last_update.tv_usec))
1013 else if ((a->label.last_update.tv_sec > b->label.last_update.tv_sec)
1014 || ((a->label.last_update.tv_sec == b->label.last_update.tv_sec)
1015 && (a->label.last_update.tv_usec > b->label.last_update.tv_usec)))
1020 /* Local Variables: */
1021 /* fill-column: 50 */