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9cd8b5cf0d
which did not exactly have the desired result. Submitted by: Akira Watanabe <akira@myaw.ei.meisei-u.ac.jp>
1011 lines
34 KiB
C
1011 lines
34 KiB
C
/*-
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* Copyright (c) 1997, 1998
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* Nan Yang Computer Services Limited. All rights reserved.
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*
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* This software is distributed under the so-called ``Berkeley
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* License'':
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Nan Yang Computer
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* Services Limited.
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* 4. Neither the name of the Company nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* This software is provided ``as is'', and any express or implied
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* warranties, including, but not limited to, the implied warranties of
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* merchantability and fitness for a particular purpose are disclaimed.
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* In no event shall the company or contributors be liable for any
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* direct, indirect, incidental, special, exemplary, or consequential
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* damages (including, but not limited to, procurement of substitute
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* goods or services; loss of use, data, or profits; or business
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* interruption) however caused and on any theory of liability, whether
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* in contract, strict liability, or tort (including negligence or
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* otherwise) arising in any way out of the use of this software, even if
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* advised of the possibility of such damage.
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*
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* $Id: vinumio.c,v 1.30 2000/05/10 23:23:30 grog Exp grog $
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* $FreeBSD$
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*/
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#include <dev/vinum/vinumhdr.h>
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#include <dev/vinum/request.h>
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#include <vm/vm_zone.h>
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static char *sappend(char *txt, char *s);
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static int drivecmp(const void *va, const void *vb);
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/*
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* Open the device associated with the drive, and set drive's vp.
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* Return an error number
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*/
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int
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open_drive(struct drive *drive, struct proc *p, int verbose)
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{
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int devmajor; /* major devs for disk device */
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int devminor; /* minor devs for disk device */
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int unit;
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char *dname;
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struct cdevsw *dsw; /* pointer to cdevsw entry */
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if (bcmp(drive->devicename, "/dev/", 5)) /* device name doesn't start with /dev */
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return ENOENT; /* give up */
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if (drive->flags & VF_OPEN) /* open already, */
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return EBUSY; /* don't do it again */
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/*
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* Yes, Bruce, I know this is horrible, but we
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* don't have a root file system when we first
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* try to do this. If you can come up with a
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* better solution, I'd really like it. I'm
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* just putting it in now to add ammuntion to
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* moving the system to devfs.
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*/
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dname = &drive->devicename[5];
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drive->dev = NULL; /* no device yet */
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/* Find the device */
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if (bcmp(dname, "ad", 2) == 0) /* IDE disk */
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devmajor = 116;
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else if (bcmp(dname, "wd", 2) == 0) /* IDE disk */
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devmajor = 3;
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else if (bcmp(dname, "da", 2) == 0)
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devmajor = 13;
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else if (bcmp(dname, "vn", 2) == 0)
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devmajor = 43;
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else if (bcmp(dname, "md", 2) == 0)
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devmajor = 95;
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else if (bcmp(dname, "amrd", 4) == 0) {
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devmajor = 133;
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dname += 2;
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} else if (bcmp(dname, "idad", 4) == 0) {
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devmajor = 109;
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dname += 2;
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} else
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return ENODEV;
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dname += 2; /* point past */
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/*
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* Found the device. We can expect one of
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* two formats for the rest: a unit number,
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* then either a partition letter for the
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* compatiblity partition (e.g. h) or a
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* slice ID and partition (e.g. s2e).
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* Create a minor number for each of them.
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*/
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unit = 0;
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while ((*dname >= '0') /* unit number */
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&&(*dname <= '9')) {
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unit = unit * 10 + *dname - '0';
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dname++;
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}
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if (*dname == 's') { /* slice */
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if (((dname[1] < '1') || (dname[1] > '4')) /* invalid slice */
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||((dname[2] < 'a') || (dname[2] > 'h'))) /* or invalid partition */
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return ENODEV;
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devminor = ((unit & 31) << 3) /* unit */
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+(dname[2] - 'a') /* partition */
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+((dname[1] - '0' + 1) << 16) /* slice */
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+((unit & ~31) << 16); /* high-order unit bits */
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} else { /* compatibility partition */
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if ((*dname < 'a') || (*dname > 'h')) /* or invalid partition */
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return ENODEV;
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devminor = (*dname - 'a') /* partition */
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+((unit & 31) << 3) /* unit */
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+((unit & ~31) << 16); /* high-order unit bits */
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}
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if ((devminor & 7) == 2) /* partition c */
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return ENOTTY; /* not buying that */
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drive->dev = makedev(devmajor, devminor); /* find the device */
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if (drive->dev == NULL) /* didn't find anything */
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return ENODEV;
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drive->dev->si_iosize_max = DFLTPHYS;
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dsw = devsw(drive->dev);
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if (dsw == NULL)
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drive->lasterror = ENOENT;
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else
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drive->lasterror = (dsw->d_open) (drive->dev, FWRITE, 0, NULL);
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if (drive->lasterror != 0) { /* failed */
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drive->state = drive_down; /* just force it down */
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if (verbose)
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log(LOG_WARNING,
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"vinum open_drive %s: failed with error %d\n",
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drive->devicename, drive->lasterror);
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} else
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drive->flags |= VF_OPEN; /* we're open now */
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return drive->lasterror;
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}
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/*
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* Set some variables in the drive struct
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* in more convenient form. Return error indication
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*/
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int
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set_drive_parms(struct drive *drive)
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{
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drive->blocksize = BLKDEV_IOSIZE; /* do we need this? */
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drive->secsperblock = drive->blocksize /* number of sectors per block */
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/ drive->partinfo.disklab->d_secsize;
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/* Now update the label part */
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bcopy(hostname, drive->label.sysname, VINUMHOSTNAMELEN); /* put in host name */
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getmicrotime(&drive->label.date_of_birth); /* and current time */
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drive->label.drive_size = ((u_int64_t) drive->partinfo.part->p_size) /* size of the drive in bytes */
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*((u_int64_t) drive->partinfo.disklab->d_secsize);
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#if VINUMDEBUG
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if (debug & DEBUG_BIGDRIVE) /* pretend we're 100 times as big */
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drive->label.drive_size *= 100;
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#endif
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/* number of sectors available for subdisks */
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drive->sectors_available = drive->label.drive_size / DEV_BSIZE - DATASTART;
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/*
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* Bug in 3.0 as of January 1998: you can open
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* non-existent slices. They have a length of 0.
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*/
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if (drive->label.drive_size < MINVINUMSLICE) { /* too small to worry about */
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set_drive_state(drive->driveno, drive_down, setstate_force);
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drive->lasterror = ENOSPC;
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return ENOSPC;
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}
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drive->freelist_size = INITIAL_DRIVE_FREELIST; /* initial number of entries */
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drive->freelist = (struct drive_freelist *)
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Malloc(INITIAL_DRIVE_FREELIST * sizeof(struct drive_freelist));
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if (drive->freelist == NULL) /* can't malloc, dammit */
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return ENOSPC;
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drive->freelist_entries = 1; /* just (almost) the complete drive */
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drive->freelist[0].offset = DATASTART; /* starts here */
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drive->freelist[0].sectors = (drive->label.drive_size >> DEV_BSHIFT) - DATASTART; /* and it's this long */
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if (drive->label.name[0] != '\0') /* got a name */
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set_drive_state(drive->driveno, drive_up, setstate_force); /* our drive is accessible */
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else /* we know about it, but that's all */
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drive->state = drive_referenced;
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return 0;
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}
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/*
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* Initialize a drive: open the device and add device
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* information
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*/
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int
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init_drive(struct drive *drive, int verbose)
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{
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if (drive->devicename[0] != '/') {
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drive->lasterror = EINVAL;
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log(LOG_ERR, "vinum: Can't open drive without drive name\n");
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return EINVAL;
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}
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drive->lasterror = open_drive(drive, curproc, verbose); /* open the drive */
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if (drive->lasterror)
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return drive->lasterror;
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drive->lasterror = (*devsw(drive->dev)->d_ioctl) (drive->dev,
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DIOCGPART,
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(caddr_t) & drive->partinfo,
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FREAD,
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curproc);
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if (drive->lasterror) {
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if (verbose)
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log(LOG_WARNING,
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"vinum open_drive %s: Can't get partition information, drive->lasterror %d\n",
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drive->devicename,
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drive->lasterror);
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close_drive(drive);
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return drive->lasterror;
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}
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if (drive->partinfo.part->p_fstype != FS_VINUM) { /* not Vinum */
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drive->lasterror = EFTYPE;
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if (verbose)
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log(LOG_WARNING,
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"vinum open_drive %s: Wrong partition type for vinum\n",
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drive->devicename);
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close_drive(drive);
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return EFTYPE;
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}
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return set_drive_parms(drive); /* set various odds and ends */
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}
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/* Close a drive if it's open. */
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void
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close_drive(struct drive *drive)
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{
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LOCKDRIVE(drive); /* keep the daemon out */
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if (drive->flags & VF_OPEN)
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close_locked_drive(drive); /* and close it */
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if (drive->state > drive_down) /* if it's up */
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drive->state = drive_down; /* make sure it's down */
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unlockdrive(drive);
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}
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/*
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* Real drive close code, called with drive already locked.
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* We have also checked that the drive is open. No errors.
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*/
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void
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close_locked_drive(struct drive *drive)
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{
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/*
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* If we can't access the drive, we can't flush
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* the queues, which spec_close() will try to
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* do. Get rid of them here first.
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*/
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drive->lasterror = (*devsw(drive->dev)->d_close) (drive->dev, 0, 0, NULL);
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drive->flags &= ~VF_OPEN; /* no longer open */
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}
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/*
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* Remove drive from the configuration.
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* Caller must ensure that it isn't active.
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*/
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void
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remove_drive(int driveno)
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{
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struct drive *drive = &vinum_conf.drive[driveno];
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struct vinum_hdr *vhdr; /* buffer for header */
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int error;
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if (drive->state > drive_referenced) { /* real drive */
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if (drive->state == drive_up) {
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vhdr = (struct vinum_hdr *) Malloc(VINUMHEADERLEN); /* allocate buffer */
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CHECKALLOC(vhdr, "Can't allocate memory");
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error = read_drive(drive, (void *) vhdr, VINUMHEADERLEN, VINUM_LABEL_OFFSET);
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if (error)
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drive->lasterror = error;
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else {
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vhdr->magic = VINUM_NOMAGIC; /* obliterate the magic, but leave the rest */
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write_drive(drive, (void *) vhdr, VINUMHEADERLEN, VINUM_LABEL_OFFSET);
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}
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Free(vhdr);
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}
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free_drive(drive); /* close it and free resources */
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save_config(); /* and save the updated configuration */
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}
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}
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/*
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* Transfer drive data. Usually called from one of these defines;
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* #define read_drive(a, b, c, d) driveio (a, b, c, d, B_READ)
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* #define write_drive(a, b, c, d) driveio (a, b, c, d, B_WRITE)
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*
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* length and offset are in bytes, but must be multiples of sector
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* size. The function *does not check* for this condition, and
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* truncates ruthlessly.
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* Return error number
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*/
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int
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driveio(struct drive *drive, char *buf, size_t length, off_t offset, int flag)
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{
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int error;
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struct buf *bp;
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error = 0; /* to keep the compiler happy */
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while (length) { /* divide into small enough blocks */
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int len = min(length, MAXBSIZE); /* maximum block device transfer is MAXBSIZE */
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bp = geteblk(len); /* get a buffer header */
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bp->b_flags = 0;
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bp->b_iocmd = flag;
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bp->b_dev = drive->dev; /* device */
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bp->b_blkno = offset / drive->partinfo.disklab->d_secsize; /* block number */
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bp->b_saveaddr = bp->b_data;
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bp->b_data = buf;
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bp->b_bcount = len;
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DEV_STRATEGY(bp, 0); /* initiate the transfer */
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error = bufwait(bp);
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bp->b_data = bp->b_saveaddr;
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bp->b_flags |= B_INVAL | B_AGE;
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bp->b_ioflags &= ~BIO_ERROR;
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brelse(bp);
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if (error)
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break;
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length -= len; /* update pointers */
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buf += len;
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offset += len;
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}
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return error;
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}
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/*
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* Check a drive for a vinum header. If found,
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* update the drive information. We come here
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* with a partially populated drive structure
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* which includes the device name.
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*
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* Return information on what we found.
|
||
*
|
||
* This function is called from two places: check_drive,
|
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* which wants to find out whether the drive is a
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* Vinum drive, and config_drive, which asserts that
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* it is a vinum drive. In the first case, we don't
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* print error messages (verbose==0), in the second
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* we do (verbose==1).
|
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*/
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enum drive_label_info
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read_drive_label(struct drive *drive, int verbose)
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{
|
||
int error;
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int result; /* result of our search */
|
||
struct vinum_hdr *vhdr; /* and as header */
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||
|
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error = init_drive(drive, 0); /* find the drive */
|
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if (error) /* find the drive */
|
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return DL_CANT_OPEN; /* not ours */
|
||
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vhdr = (struct vinum_hdr *) Malloc(VINUMHEADERLEN); /* allocate buffers */
|
||
CHECKALLOC(vhdr, "Can't allocate memory");
|
||
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drive->state = drive_up; /* be optimistic */
|
||
error = read_drive(drive, (void *) vhdr, VINUMHEADERLEN, VINUM_LABEL_OFFSET);
|
||
if (vhdr->magic == VINUM_MAGIC) { /* ours! */
|
||
if (drive->label.name[0] /* we have a name for this drive */
|
||
&&(strcmp(drive->label.name, vhdr->label.name))) { /* but it doesn't match the real name */
|
||
drive->lasterror = EINVAL;
|
||
result = DL_WRONG_DRIVE; /* it's the wrong drive */
|
||
drive->state = drive_unallocated; /* put it back, it's not ours */
|
||
} else
|
||
result = DL_OURS;
|
||
/*
|
||
* We copy the drive anyway so that we have
|
||
* the correct name in the drive info. This
|
||
* may not be the name specified
|
||
*/
|
||
drive->label = vhdr->label; /* put in the label information */
|
||
} else if (vhdr->magic == VINUM_NOMAGIC) /* was ours, but we gave it away */
|
||
result = DL_DELETED_LABEL; /* and return the info */
|
||
else
|
||
result = DL_NOT_OURS; /* we could have it, but we don't yet */
|
||
Free(vhdr); /* that's all. */
|
||
return result;
|
||
}
|
||
|
||
/*
|
||
* Check a drive for a vinum header. If found,
|
||
* read configuration information from the drive and
|
||
* incorporate the data into the configuration.
|
||
*
|
||
* Return drive number.
|
||
*/
|
||
struct drive *
|
||
check_drive(char *devicename)
|
||
{
|
||
int driveno;
|
||
int i;
|
||
struct drive *drive;
|
||
|
||
driveno = find_drive_by_dev(devicename, 1); /* if entry doesn't exist, create it */
|
||
drive = &vinum_conf.drive[driveno]; /* and get a pointer */
|
||
|
||
if (read_drive_label(drive, 0) == DL_OURS) { /* one of ours */
|
||
for (i = 0; i < vinum_conf.drives_allocated; i++) { /* see if the name already exists */
|
||
if ((i != driveno) /* not this drive */
|
||
&&(DRIVE[i].state != drive_unallocated) /* and it's allocated */
|
||
&&(strcmp(DRIVE[i].label.name,
|
||
DRIVE[driveno].label.name) == 0)) { /* and it has the same name */
|
||
struct drive *mydrive = &DRIVE[i];
|
||
|
||
if (mydrive->devicename[0] == '/') { /* we know a device name for it */
|
||
/*
|
||
* set an error, but don't take the
|
||
* drive down: that would cause unneeded
|
||
* error messages.
|
||
*/
|
||
drive->lasterror = EEXIST;
|
||
break;
|
||
} else { /* it's just a place holder, */
|
||
int sdno;
|
||
|
||
for (sdno = 0; sdno < vinum_conf.subdisks_allocated; sdno++) { /* look at each subdisk */
|
||
if ((SD[sdno].driveno == i) /* it's pointing to this one, */
|
||
&&(SD[sdno].state != sd_unallocated)) { /* and it's a real subdisk */
|
||
SD[sdno].driveno = drive->driveno; /* point to the one we found */
|
||
update_sd_state(sdno); /* and update its state */
|
||
}
|
||
}
|
||
bzero(mydrive, sizeof(struct drive)); /* don't deallocate it, just remove it */
|
||
}
|
||
}
|
||
}
|
||
} else {
|
||
if (drive->lasterror == 0)
|
||
drive->lasterror = ENODEV;
|
||
close_drive(drive);
|
||
drive->state = drive_down;
|
||
}
|
||
return drive;
|
||
}
|
||
|
||
static char *
|
||
sappend(char *txt, char *s)
|
||
{
|
||
while ((*s++ = *txt++) != 0);
|
||
return s - 1;
|
||
}
|
||
|
||
void
|
||
format_config(char *config, int len)
|
||
{
|
||
int i;
|
||
int j;
|
||
char *s = config;
|
||
char *configend = &config[len];
|
||
|
||
bzero(config, len);
|
||
|
||
/* First write the volume configuration */
|
||
for (i = 0; i < vinum_conf.volumes_allocated; i++) {
|
||
struct volume *vol;
|
||
|
||
vol = &vinum_conf.volume[i];
|
||
if ((vol->state > volume_uninit)
|
||
&& (vol->name[0] != '\0')) { /* paranoia */
|
||
snprintf(s,
|
||
configend - s,
|
||
"volume %s state %s",
|
||
vol->name,
|
||
volume_state(vol->state));
|
||
while (*s)
|
||
s++; /* find the end */
|
||
if (vol->preferred_plex >= 0) /* preferences, */
|
||
snprintf(s,
|
||
configend - s,
|
||
" readpol prefer %s",
|
||
vinum_conf.plex[vol->preferred_plex].name);
|
||
while (*s)
|
||
s++; /* find the end */
|
||
s = sappend("\n", s);
|
||
}
|
||
}
|
||
|
||
/* Then the plex configuration */
|
||
for (i = 0; i < vinum_conf.plexes_allocated; i++) {
|
||
struct plex *plex;
|
||
|
||
plex = &vinum_conf.plex[i];
|
||
if ((plex->state > plex_referenced)
|
||
&& (plex->name[0] != '\0')) { /* paranoia */
|
||
snprintf(s,
|
||
configend - s,
|
||
"plex name %s state %s org %s ",
|
||
plex->name,
|
||
plex_state(plex->state),
|
||
plex_org(plex->organization));
|
||
while (*s)
|
||
s++; /* find the end */
|
||
if (isstriped(plex)) {
|
||
snprintf(s,
|
||
configend - s,
|
||
"%ds ",
|
||
(int) plex->stripesize);
|
||
while (*s)
|
||
s++; /* find the end */
|
||
}
|
||
if (plex->volno >= 0) /* we have a volume */
|
||
snprintf(s,
|
||
configend - s,
|
||
"vol %s ",
|
||
vinum_conf.volume[plex->volno].name);
|
||
while (*s)
|
||
s++; /* find the end */
|
||
for (j = 0; j < plex->subdisks; j++) {
|
||
snprintf(s,
|
||
configend - s,
|
||
" sd %s",
|
||
vinum_conf.sd[plex->sdnos[j]].name);
|
||
}
|
||
s = sappend("\n", s);
|
||
}
|
||
}
|
||
|
||
/* And finally the subdisk configuration */
|
||
for (i = 0; i < vinum_conf.subdisks_allocated; i++) {
|
||
struct sd *sd;
|
||
char *drivename;
|
||
|
||
sd = &SD[i];
|
||
if ((sd->state != sd_referenced)
|
||
&& (sd->state != sd_unallocated)
|
||
&& (sd->name[0] != '\0')) { /* paranoia */
|
||
drivename = vinum_conf.drive[sd->driveno].label.name;
|
||
/*
|
||
* XXX We've seen cases of dead subdisks
|
||
* which don't have a drive. If we let them
|
||
* through here, the drive name is null, so
|
||
* they get the drive named 'plex'.
|
||
*
|
||
* This is a breakage limiter, not a fix.
|
||
*/
|
||
if (drivename[0] == '\0')
|
||
drivename = "*invalid*";
|
||
if (sd->plexno >= 0)
|
||
snprintf(s,
|
||
configend - s,
|
||
"sd name %s drive %s plex %s state %s "
|
||
"len %llus driveoffset %llus plexoffset %llds\n",
|
||
sd->name,
|
||
drivename,
|
||
vinum_conf.plex[sd->plexno].name,
|
||
sd_state(sd->state),
|
||
(unsigned long long) sd->sectors,
|
||
(unsigned long long) sd->driveoffset,
|
||
(long long) sd->plexoffset);
|
||
else
|
||
snprintf(s,
|
||
configend - s,
|
||
"sd name %s drive %s state %s "
|
||
"len %llus driveoffset %llus detached\n",
|
||
sd->name,
|
||
drivename,
|
||
sd_state(sd->state),
|
||
(unsigned long long) sd->sectors,
|
||
(unsigned long long) sd->driveoffset);
|
||
while (*s)
|
||
s++; /* find the end */
|
||
}
|
||
}
|
||
if (s > &config[len - 2])
|
||
panic("vinum: configuration data overflow");
|
||
}
|
||
|
||
/*
|
||
* issue a save config request to the d<>mon. The actual work
|
||
* is done in process context by daemon_save_config
|
||
*/
|
||
void
|
||
save_config(void)
|
||
{
|
||
queue_daemon_request(daemonrq_saveconfig, (union daemoninfo) NULL);
|
||
}
|
||
|
||
/*
|
||
* Write the configuration to all vinum slices. This
|
||
* is performed by the d<>mon only
|
||
*/
|
||
void
|
||
daemon_save_config(void)
|
||
{
|
||
int error;
|
||
int written_config; /* set when we first write the config to disk */
|
||
int driveno;
|
||
struct drive *drive; /* point to current drive info */
|
||
struct vinum_hdr *vhdr; /* and as header */
|
||
char *config; /* point to config data */
|
||
int wlabel_on; /* to set writing label on/off */
|
||
|
||
/* don't save the configuration while we're still working on it */
|
||
if (vinum_conf.flags & VF_CONFIGURING)
|
||
return;
|
||
written_config = 0; /* no config written yet */
|
||
/* Build a volume header */
|
||
vhdr = (struct vinum_hdr *) Malloc(VINUMHEADERLEN); /* get space for the config data */
|
||
CHECKALLOC(vhdr, "Can't allocate config data");
|
||
vhdr->magic = VINUM_MAGIC; /* magic number */
|
||
vhdr->config_length = MAXCONFIG; /* length of following config info */
|
||
|
||
config = Malloc(MAXCONFIG); /* get space for the config data */
|
||
CHECKALLOC(config, "Can't allocate config data");
|
||
|
||
format_config(config, MAXCONFIG);
|
||
error = 0; /* no errors yet */
|
||
for (driveno = 0; driveno < vinum_conf.drives_allocated; driveno++) {
|
||
drive = &vinum_conf.drive[driveno]; /* point to drive */
|
||
if (drive->state > drive_referenced) {
|
||
LOCKDRIVE(drive); /* don't let it change */
|
||
|
||
/*
|
||
* First, do some drive consistency checks. Some
|
||
* of these are kludges, others require a process
|
||
* context and couldn't be done before
|
||
*/
|
||
if ((drive->devicename[0] == '\0')
|
||
|| (drive->label.name[0] == '\0')) {
|
||
unlockdrive(drive);
|
||
free_drive(drive); /* get rid of it */
|
||
break;
|
||
}
|
||
if (((drive->flags & VF_OPEN) == 0) /* drive not open */
|
||
&&(drive->state > drive_down)) { /* and it thinks it's not down */
|
||
unlockdrive(drive);
|
||
set_drive_state(driveno, drive_down, setstate_force); /* tell it what's what */
|
||
continue;
|
||
}
|
||
if ((drive->state == drive_down) /* it's down */
|
||
&&(drive->flags & VF_OPEN)) { /* but open, */
|
||
unlockdrive(drive);
|
||
close_drive(drive); /* close it */
|
||
} else if (drive->state > drive_down) {
|
||
getmicrotime(&drive->label.last_update); /* time of last update is now */
|
||
bcopy((char *) &drive->label, /* and the label info from the drive structure */
|
||
(char *) &vhdr->label,
|
||
sizeof(vhdr->label));
|
||
if ((drive->state != drive_unallocated)
|
||
&& (drive->state != drive_referenced)) { /* and it's a real drive */
|
||
wlabel_on = 1; /* enable writing the label */
|
||
error = (*devsw(drive->dev)->d_ioctl) (drive->dev, /* make the label writeable */
|
||
DIOCWLABEL,
|
||
(caddr_t) & wlabel_on,
|
||
FWRITE,
|
||
curproc);
|
||
if (error == 0)
|
||
error = write_drive(drive, (char *) vhdr, VINUMHEADERLEN, VINUM_LABEL_OFFSET);
|
||
if (error == 0)
|
||
error = write_drive(drive, config, MAXCONFIG, VINUM_CONFIG_OFFSET); /* first config copy */
|
||
if (error == 0)
|
||
error = write_drive(drive, config, MAXCONFIG, VINUM_CONFIG_OFFSET + MAXCONFIG); /* second copy */
|
||
wlabel_on = 0; /* enable writing the label */
|
||
if (error == 0)
|
||
error = (*devsw(drive->dev)->d_ioctl) (drive->dev, /* make the label non-writeable again */
|
||
DIOCWLABEL,
|
||
(caddr_t) & wlabel_on,
|
||
FWRITE,
|
||
curproc);
|
||
unlockdrive(drive);
|
||
if (error) {
|
||
log(LOG_ERR,
|
||
"vinum: Can't write config to %s, error %d\n",
|
||
drive->devicename,
|
||
error);
|
||
set_drive_state(drive->driveno, drive_down, setstate_force);
|
||
} else
|
||
written_config = 1; /* we've written it on at least one drive */
|
||
}
|
||
} else /* not worth looking at, */
|
||
unlockdrive(drive); /* just unlock it again */
|
||
}
|
||
}
|
||
Free(vhdr);
|
||
Free(config);
|
||
}
|
||
|
||
/*
|
||
* Disk labels are a mess. The correct way to
|
||
* access them is with the DIOC[GSW]DINFO ioctls,
|
||
* but some programs, such as newfs, access the
|
||
* disk directly, so we have to write things
|
||
* there. We do this only on request. If a user
|
||
* request tries to read it directly, we fake up
|
||
* one on the fly.
|
||
*/
|
||
|
||
/*
|
||
* get_volume_label returns a label structure to lp, which
|
||
* is allocated by the caller
|
||
*/
|
||
void
|
||
get_volume_label(char *name, int plexes, u_int64_t size, struct disklabel *lp)
|
||
{
|
||
bzero(lp, sizeof(struct disklabel));
|
||
|
||
strncpy(lp->d_typename, "vinum", sizeof(lp->d_typename));
|
||
lp->d_type = DTYPE_VINUM;
|
||
strncpy(lp->d_packname, name, min(sizeof(lp->d_packname), sizeof(name)));
|
||
lp->d_rpm = 14400 * plexes; /* to keep them guessing */
|
||
lp->d_interleave = 1;
|
||
lp->d_flags = 0;
|
||
|
||
/*
|
||
* A Vinum volume has a single track with all
|
||
* its sectors.
|
||
*/
|
||
lp->d_secsize = DEV_BSIZE; /* bytes per sector */
|
||
lp->d_nsectors = size; /* data sectors per track */
|
||
lp->d_ntracks = 1; /* tracks per cylinder */
|
||
lp->d_ncylinders = 1; /* data cylinders per unit */
|
||
lp->d_secpercyl = size; /* data sectors per cylinder */
|
||
lp->d_secperunit = size; /* data sectors per unit */
|
||
|
||
lp->d_bbsize = BBSIZE;
|
||
lp->d_sbsize = SBSIZE;
|
||
|
||
lp->d_magic = DISKMAGIC;
|
||
lp->d_magic2 = DISKMAGIC;
|
||
|
||
/*
|
||
* Set up partitions a, b and c to be identical
|
||
* and the size of the volume. a is UFS, b is
|
||
* swap, c is nothing.
|
||
*/
|
||
lp->d_partitions[0].p_size = size;
|
||
lp->d_partitions[0].p_fsize = 1024;
|
||
lp->d_partitions[0].p_fstype = FS_BSDFFS; /* FreeBSD File System :-) */
|
||
lp->d_partitions[0].p_fsize = 1024; /* FS fragment size */
|
||
lp->d_partitions[0].p_frag = 8; /* and fragments per block */
|
||
lp->d_partitions[SWAP_PART].p_size = size;
|
||
lp->d_partitions[SWAP_PART].p_fstype = FS_SWAP; /* swap partition */
|
||
lp->d_partitions[LABEL_PART].p_size = size;
|
||
lp->d_npartitions = LABEL_PART + 1;
|
||
strncpy(lp->d_packname, name, min(sizeof(lp->d_packname), sizeof(name)));
|
||
lp->d_checksum = dkcksum(lp);
|
||
}
|
||
|
||
/* Write a volume label. This implements the VINUM_LABEL ioctl. */
|
||
int
|
||
write_volume_label(int volno)
|
||
{
|
||
struct disklabel *lp;
|
||
struct buf *bp;
|
||
struct disklabel *dlp;
|
||
struct volume *vol;
|
||
int error;
|
||
|
||
lp = (struct disklabel *) Malloc((sizeof(struct disklabel) + (DEV_BSIZE - 1)) & (DEV_BSIZE - 1));
|
||
if (lp == 0)
|
||
return ENOMEM;
|
||
|
||
if ((unsigned) (volno) >= (unsigned) vinum_conf.volumes_allocated) /* invalid volume */
|
||
return ENOENT;
|
||
|
||
vol = &VOL[volno]; /* volume in question */
|
||
if (vol->state <= volume_uninit) /* nothing there */
|
||
return ENXIO;
|
||
else if (vol->state < volume_up) /* not accessible */
|
||
return EIO; /* I/O error */
|
||
|
||
get_volume_label(vol->name, vol->plexes, vol->size, lp); /* get the label */
|
||
|
||
/*
|
||
* Now write to disk. This code is derived from the
|
||
* system writedisklabel (), which does silly things
|
||
* like reading the label and refusing to write
|
||
* unless it's already there.
|
||
*/
|
||
bp = geteblk((int) lp->d_secsize); /* get a buffer */
|
||
bp->b_dev = makedev(VINUM_CDEV_MAJOR, vol->volno); /* our own raw volume */
|
||
bp->b_blkno = LABELSECTOR * ((int) lp->d_secsize / DEV_BSIZE);
|
||
bp->b_bcount = lp->d_secsize;
|
||
bzero(bp->b_data, lp->d_secsize);
|
||
dlp = (struct disklabel *) bp->b_data;
|
||
*dlp = *lp;
|
||
bp->b_flags &= ~B_INVAL;
|
||
bp->b_iocmd = BIO_WRITE;
|
||
|
||
/*
|
||
* This should read:
|
||
*
|
||
* vinumstrategy (bp);
|
||
*
|
||
* Negotiate with phk to get it fixed.
|
||
*/
|
||
DEV_STRATEGY(bp, 0);
|
||
error = bufwait(bp);
|
||
bp->b_flags |= B_INVAL | B_AGE;
|
||
bp->b_ioflags &= ~BIO_ERROR;
|
||
|
||
brelse(bp);
|
||
return error;
|
||
}
|
||
|
||
/* Look at all disks on the system for vinum slices */
|
||
int
|
||
vinum_scandisk(char *devicename[], int drives)
|
||
{
|
||
struct drive *volatile drive;
|
||
volatile int driveno;
|
||
int firstdrive; /* first drive in this list */
|
||
volatile int gooddrives; /* number of usable drives found */
|
||
int firsttime; /* set if we have never configured before */
|
||
int error;
|
||
char *config_text; /* read the config info from disk into here */
|
||
char *volatile cptr; /* pointer into config information */
|
||
char *eptr; /* end pointer into config information */
|
||
char *config_line; /* copy the config line to */
|
||
volatile int status;
|
||
int *volatile drivelist; /* list of drive indices */
|
||
#define DRIVENAMELEN 64
|
||
#define DRIVEPARTS 35 /* max partitions per drive, excluding c */
|
||
char partname[DRIVENAMELEN]; /* for creating partition names */
|
||
|
||
status = 0; /* success indication */
|
||
vinum_conf.flags |= VF_READING_CONFIG; /* reading config from disk */
|
||
|
||
gooddrives = 0; /* number of usable drives found */
|
||
firstdrive = vinum_conf.drives_used; /* the first drive */
|
||
firsttime = vinum_conf.drives_used == 0; /* are we a virgin? */
|
||
|
||
/* allocate a drive pointer list */
|
||
drivelist = (int *) Malloc(drives * DRIVEPARTS * sizeof(int));
|
||
CHECKALLOC(drivelist, "Can't allocate memory");
|
||
|
||
/* Open all drives and find which was modified most recently */
|
||
for (driveno = 0; driveno < drives; driveno++) {
|
||
char part; /* UNIX partition */
|
||
int slice;
|
||
int founddrive; /* flag when we find a vinum drive */
|
||
|
||
founddrive = 0; /* no vinum drive found yet on this spindle */
|
||
/* first try the partition table */
|
||
for (slice = 1; slice < 5; slice++)
|
||
for (part = 'a'; part < 'i'; part++) {
|
||
if (part != 'c') { /* don't do the c partition */
|
||
snprintf(partname,
|
||
DRIVENAMELEN,
|
||
"%ss%d%c",
|
||
devicename[driveno],
|
||
slice,
|
||
part);
|
||
drive = check_drive(partname); /* try to open it */
|
||
if ((drive->lasterror != 0) /* didn't work, */
|
||
||(drive->state != drive_up))
|
||
free_drive(drive); /* get rid of it */
|
||
else if (drive->flags & VF_CONFIGURED) /* already read this config, */
|
||
log(LOG_WARNING,
|
||
"vinum: already read config from %s\n", /* say so */
|
||
drive->label.name);
|
||
else {
|
||
drivelist[gooddrives] = drive->driveno; /* keep the drive index */
|
||
drive->flags &= ~VF_NEWBORN; /* which is no longer newly born */
|
||
gooddrives++;
|
||
founddrive++;
|
||
}
|
||
}
|
||
}
|
||
if (founddrive == 0) { /* didn't find anything, */
|
||
for (part = 'a'; part < 'i'; part++) /* try the compatibility partition */
|
||
if (part != 'c') { /* don't do the c partition */
|
||
snprintf(partname, /* /dev/sd0a */
|
||
DRIVENAMELEN,
|
||
"%s%c",
|
||
devicename[driveno],
|
||
part);
|
||
drive = check_drive(partname); /* try to open it */
|
||
if ((drive->lasterror != 0) /* didn't work, */
|
||
||(drive->state != drive_up))
|
||
free_drive(drive); /* get rid of it */
|
||
else if (drive->flags & VF_CONFIGURED) /* already read this config, */
|
||
log(LOG_WARNING,
|
||
"vinum: already read config from %s\n", /* say so */
|
||
drive->label.name);
|
||
else {
|
||
drivelist[gooddrives] = drive->driveno; /* keep the drive index */
|
||
drive->flags &= ~VF_NEWBORN; /* which is no longer newly born */
|
||
gooddrives++;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
if (gooddrives == 0) {
|
||
log(LOG_WARNING, "vinum: no drives found\n");
|
||
return ENOENT;
|
||
}
|
||
/*
|
||
* We now have at least one drive
|
||
* open. Sort them in order of config time
|
||
* and merge the config info with what we
|
||
* have already.
|
||
*/
|
||
qsort(drivelist, gooddrives, sizeof(int), drivecmp);
|
||
config_text = (char *) Malloc(MAXCONFIG * 2); /* allocate buffers */
|
||
CHECKALLOC(config_text, "Can't allocate memory");
|
||
config_line = (char *) Malloc(MAXCONFIGLINE * 2); /* allocate buffers */
|
||
CHECKALLOC(config_line, "Can't allocate memory");
|
||
for (driveno = 0; driveno < gooddrives; driveno++) { /* now include the config */
|
||
drive = &DRIVE[drivelist[driveno]]; /* point to the drive */
|
||
|
||
if (firsttime && (driveno == 0)) /* we've never configured before, */
|
||
log(LOG_INFO, "vinum: reading configuration from %s\n", drive->devicename);
|
||
else
|
||
log(LOG_INFO, "vinum: updating configuration from %s\n", drive->devicename);
|
||
|
||
if (drive->state == drive_up)
|
||
/* Read in both copies of the configuration information */
|
||
error = read_drive(drive, config_text, MAXCONFIG * 2, VINUM_CONFIG_OFFSET);
|
||
else {
|
||
error = EIO;
|
||
printf("vinum_scandisk: %s is %s\n", drive->devicename, drive_state(drive->state));
|
||
}
|
||
|
||
if (error != 0) {
|
||
log(LOG_ERR, "vinum: Can't read device %s, error %d\n", drive->devicename, error);
|
||
free_drive(drive); /* give it back */
|
||
status = error;
|
||
}
|
||
/*
|
||
* At this point, check that the two copies
|
||
* are the same, and do something useful if
|
||
* not. In particular, consider which is
|
||
* newer, and what this means for the
|
||
* integrity of the data on the drive.
|
||
*/
|
||
else {
|
||
vinum_conf.drives_used++; /* another drive in use */
|
||
/* Parse the configuration, and add it to the global configuration */
|
||
for (cptr = config_text; *cptr != '\0';) { /* love this style(9) */
|
||
volatile int parse_status; /* return value from parse_config */
|
||
|
||
for (eptr = config_line; (*cptr != '\n') && (*cptr != '\0');) /* until the end of the line */
|
||
*eptr++ = *cptr++;
|
||
*eptr = '\0'; /* and delimit */
|
||
if (setjmp(command_fail) == 0) { /* come back here on error and continue */
|
||
parse_status = parse_config(config_line, &keyword_set, 1); /* parse the config line */
|
||
if (parse_status < 0) { /* error in config */
|
||
/*
|
||
* This config should have been parsed in user
|
||
* space. If we run into problems here, something
|
||
* serious is afoot. Complain and let the user
|
||
* snarf the config to see what's wrong.
|
||
*/
|
||
log(LOG_ERR,
|
||
"vinum: Config error on %s, aborting integration\n",
|
||
drive->devicename);
|
||
free_drive(drive); /* give it back */
|
||
status = EINVAL;
|
||
}
|
||
}
|
||
while (*cptr == '\n')
|
||
cptr++; /* skip to next line */
|
||
}
|
||
}
|
||
drive->flags |= VF_CONFIGURED; /* read this drive's configuration */
|
||
}
|
||
|
||
Free(config_text);
|
||
Free(drivelist);
|
||
vinum_conf.flags &= ~VF_READING_CONFIG; /* no longer reading from disk */
|
||
if (status != 0)
|
||
printf("vinum: couldn't read configuration");
|
||
else
|
||
updateconfig(VF_READING_CONFIG); /* update from disk config */
|
||
return status;
|
||
}
|
||
|
||
/*
|
||
* Compare the modification dates of the drives, for qsort.
|
||
* Return 1 if a < b, 0 if a == b, 01 if a > b: in other
|
||
* words, sort backwards.
|
||
*/
|
||
int
|
||
drivecmp(const void *va, const void *vb)
|
||
{
|
||
const struct drive *a = &DRIVE[*(const int *) va];
|
||
const struct drive *b = &DRIVE[*(const int *) vb];
|
||
|
||
if ((a->label.last_update.tv_sec == b->label.last_update.tv_sec)
|
||
&& (a->label.last_update.tv_usec == b->label.last_update.tv_usec))
|
||
return 0;
|
||
else if ((a->label.last_update.tv_sec > b->label.last_update.tv_sec)
|
||
|| ((a->label.last_update.tv_sec == b->label.last_update.tv_sec)
|
||
&& (a->label.last_update.tv_usec > b->label.last_update.tv_usec)))
|
||
return -1;
|
||
else
|
||
return 1;
|
||
}
|
||
/* Local Variables: */
|
||
/* fill-column: 50 */
|
||
/* End: */
|