1033 lines
34 KiB
C
1033 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 1.7 1999/01/21 00:34:50 grog Exp $
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*/
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#define STATIC /* nothing while we're testing XXX */
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#include "opt_vinum.h"
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#define REALLYKERNEL
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#include <dev/vinum/vinumhdr.h>
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#include <dev/vinum/request.h>
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#include <miscfs/specfs/specdev.h>
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extern jmp_buf command_fail; /* return on a failed command */
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struct _ioctl_reply *ioctl_reply; /* data pointer, for returning error messages */
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/* Why aren't these declared anywhere? XXX */
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int setjmp(jmp_buf);
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void longjmp(jmp_buf, int);
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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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/* Open the device associated with the drive, and set drive's vp.
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* Return an error number */
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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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struct nameidata nd;
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struct vattr va;
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int error;
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if (drive->devicename[0] == '\0') /* no device name */
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sprintf(drive->devicename, "/dev/%s", drive->label.name); /* get it from the drive name */
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NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, drive->devicename, p);
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error = vn_open(&nd, FREAD | FWRITE, 0); /* open the device */
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if (error != 0) { /* can't open? */
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set_drive_state(drive->driveno, drive_down, setstate_force);
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drive->lasterror = error;
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if (verbose)
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printf("vinum open_drive %s: failed with error %d\n", drive->devicename, error); /* XXX */
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return error;
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}
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drive->vp = nd.ni_vp;
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drive->p = p;
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if (drive->vp->v_usecount > 1) { /* already in use? */
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if (verbose)
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printf("open_drive %s: use count %d, ignoring\n", /* XXX where does this come from? */
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drive->devicename,
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drive->vp->v_usecount);
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drive->vp->v_usecount = 1; /* will this work? */
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}
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error = VOP_GETATTR(drive->vp, &va, NOCRED, drive->p);
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if (error) {
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VOP_UNLOCK(drive->vp, 0, drive->p);
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close_drive(drive);
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set_drive_state(drive->driveno, drive_down, setstate_force);
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drive->lasterror = error;
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if (verbose)
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printf("vinum open_drive %s: GETAATTR returns error %d\n", drive->devicename, error); /* XXX */
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return error;
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}
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drive->dev = va.va_rdev; /* device */
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if (va.va_type != VBLK) { /* only consider block devices */
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VOP_UNLOCK(drive->vp, 0, drive->p);
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close_drive(drive);
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set_drive_state(drive->driveno, drive_down, setstate_force); /* this also closes the drive */
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drive->lasterror = ENOTBLK;
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if (verbose)
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printf("vinum open_drive %s: Not a block device\n", drive->devicename); /* XXX */
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return ENOTBLK;
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}
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drive->vp->v_numoutput = 0;
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VOP_UNLOCK(drive->vp, 0, drive->p);
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return 0;
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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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int
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set_drive_parms(struct drive *drive)
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{
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drive->blocksize = BLKDEV_IOSIZE; /* XXX 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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/* number of sectors available for subdisks */
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drive->sectors_available = drive->label.drive_size / DEV_BSIZE - DATASTART;
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/* XXX 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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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_uninit;
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return 0;
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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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int
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init_drive(struct drive *drive, int verbose)
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{
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int error;
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if (drive->devicename[0] == '\0') { /* no device name yet, default to drive name */
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drive->lasterror = EINVAL;
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/* This is a bug if it happens internally,
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* so print a message regardless */
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printf("vinum: Can't open drive without drive name\n"); /* XXX */
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return EINVAL;
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}
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error = open_drive(drive, curproc, verbose); /* open the drive */
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if (error)
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return error;
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error = VOP_IOCTL(drive->vp, /* get the partition information */
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DIOCGPART,
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(caddr_t) & drive->partinfo,
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FREAD,
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NOCRED,
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curproc);
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if (error) {
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if (verbose)
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printf("vinum open_drive %s: Can't get partition information, error %d\n",
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drive->devicename,
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error); /* XXX */
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close_drive(drive);
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drive->lasterror = error;
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set_drive_state(drive->driveno, drive_down, setstate_force);
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return error;
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}
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if (drive->partinfo.part->p_fstype != 0) { /* not plain */
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drive->lasterror = EFTYPE;
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if (verbose)
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printf("vinum open_drive %s: Wrong partition type for vinum\n", drive->devicename); /* XXX */
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close_drive(drive);
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set_drive_state(drive->driveno, drive_down, setstate_force);
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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. No errors */
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void
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close_drive(struct drive *drive)
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{
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if (drive->vp) {
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lockdrive(drive); /* keep the daemon out */
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vn_close(drive->vp, FREAD | FWRITE, NOCRED, drive->p);
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if (drive->vp->v_usecount) { /* XXX shouldn't happen */
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printf("close_drive %s: use count still %d\n", drive->devicename, drive->vp->v_usecount);
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drive->vp->v_usecount = 0; /* will this work? */
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}
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drive->vp = NULL;
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unlockdrive(drive);
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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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long long int nomagic = VINUM_NOMAGIC; /* no magic number */
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write_drive(drive, /* obliterate the magic, but leave a hint */
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(char *) &nomagic,
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8,
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VINUM_LABEL_OFFSET);
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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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/* 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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char foo[40];
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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 = B_BUSY | flag; /* get busy */
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bp->b_proc = curproc; /* process */
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bp->b_dev = drive->vp->v_un.vu_specinfo->si_rdev; /* device */
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bp->b_blkno = offset / drive->partinfo.disklab->d_secsize; /* block number */
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bp->b_data = buf;
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bp->b_bcount = len;
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bp->b_bufsize = len;
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(*bdevsw[major(bp->b_dev)]->d_strategy) (bp); /* initiate the transfer */
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error = biowait(bp);
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printf("driveio: %s dev 0x%x, block 0x%x, len 0x%lx, error %d\n", /* XXX */
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flag ? "read" : "write",
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bp->b_dev,
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bp->b_blkno,
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bp->b_bcount,
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error);
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bcopy(buf, foo, 40);
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foo[39] = '\0';
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printf("---> %s\n", foo); /* XXXXXX */
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bp->b_flags |= B_INVAL | B_AGE;
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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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/* Read data from a drive
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* Return error number
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*/
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int
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read_drive(struct drive *drive, void *buf, size_t length, off_t offset)
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{
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int error;
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struct buf *bp;
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daddr_t nextbn;
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long bscale;
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struct uio uio;
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struct iovec iov;
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daddr_t blocknum; /* block number */
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int blockoff; /* offset in block */
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int count; /* amount to transfer */
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iov.iov_base = buf;
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iov.iov_len = length;
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uio.uio_iov = &iov;
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uio.uio_iovcnt = length;
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uio.uio_offset = offset;
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uio.uio_resid = length;
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uio.uio_segflg = UIO_SYSSPACE;
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uio.uio_rw = UIO_READ;
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uio.uio_procp = curproc;
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bscale = btodb(drive->blocksize); /* mask off offset from block number */
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do {
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blocknum = btodb(uio.uio_offset) & ~(bscale - 1); /* get the block number */
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blockoff = uio.uio_offset % drive->blocksize; /* offset in block */
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count = min((unsigned) (drive->blocksize - blockoff), /* amount to transfer in this block */
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uio.uio_resid);
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/* XXX Check this. I think the test is wrong */
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if (drive->vp->v_lastr + bscale == blocknum) { /* did our last read finish in this block? */
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nextbn = blocknum + bscale; /* note the end of the transfer */
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error = breadn(drive->vp, /* and read with read-ahead */
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blocknum,
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(int) drive->blocksize,
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&nextbn,
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(int *) &drive->blocksize,
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1,
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NOCRED,
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&bp);
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} else /* random read: just read this block */
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error = bread(drive->vp, blocknum, (int) drive->blocksize, NOCRED, &bp);
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drive->vp->v_lastr = blocknum; /* note the last block we read */
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count = min(count, drive->blocksize - bp->b_resid);
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if (error) {
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brelse(bp);
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return error;
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}
|
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error = uiomove((char *) bp->b_data + blockoff, count, &uio); /* move the data */
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brelse(bp);
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}
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while (error == 0 && uio.uio_resid > 0 && count != 0);
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return error;
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||
}
|
||
|
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/* Write data to a drive
|
||
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* Return error number
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||
*/
|
||
int
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write_drive(struct drive *drive, void *buf, size_t length, off_t offset)
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{
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||
int error;
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||
struct buf *bp;
|
||
struct uio uio;
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||
struct iovec iov;
|
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daddr_t blocknum; /* block number */
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int blockoff; /* offset in block */
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int count; /* amount to transfer */
|
||
int blockshift;
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||
|
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if (drive->state == drive_down) /* currently down */
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return 0; /* ignore */
|
||
if (drive->vp == NULL) {
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drive->lasterror = ENODEV;
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return ENODEV; /* not configured yet */
|
||
}
|
||
iov.iov_base = buf;
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||
iov.iov_len = length;
|
||
|
||
uio.uio_iov = &iov;
|
||
uio.uio_iovcnt = length;
|
||
uio.uio_offset = offset;
|
||
uio.uio_resid = length;
|
||
uio.uio_segflg = UIO_SYSSPACE;
|
||
uio.uio_rw = UIO_WRITE;
|
||
uio.uio_procp = curproc;
|
||
|
||
error = 0;
|
||
blockshift = btodb(drive->blocksize) - 1; /* amount to shift block number
|
||
* to get sector number */
|
||
do {
|
||
blocknum = btodb(uio.uio_offset) & ~blockshift; /* get the block number */
|
||
blockoff = uio.uio_offset % drive->blocksize; /* offset in block */
|
||
count = min((unsigned) (drive->blocksize - blockoff), /* amount to transfer in this block */
|
||
uio.uio_resid);
|
||
if (count == drive->blocksize) /* the whole block */
|
||
bp = getblk(drive->vp, blocknum, drive->blocksize, 0, 0); /* just transfer it */
|
||
else /* partial block: */
|
||
error = bread(drive->vp, /* read it first */
|
||
blocknum,
|
||
drive->blocksize,
|
||
NOCRED,
|
||
&bp);
|
||
count = min(count, drive->blocksize - bp->b_resid); /* how much will we transfer now? */
|
||
if (error == 0)
|
||
error = uiomove((char *) bp->b_data + blockoff, /* move the data to the block */
|
||
count,
|
||
&uio);
|
||
if (error) {
|
||
brelse(bp);
|
||
drive->lasterror = error;
|
||
switch (error) {
|
||
case EIO:
|
||
set_drive_state(drive->driveno, drive_down, setstate_force);
|
||
break;
|
||
|
||
/* XXX Add other possibilities here */
|
||
default:
|
||
}
|
||
return error;
|
||
}
|
||
if (count + blockoff == drive->blocksize)
|
||
/* The transfer goes to the end of the block. There's
|
||
* no need to wait for any more data to arrive. */
|
||
bawrite(bp); /* start the write now */
|
||
else
|
||
bdwrite(bp); /* do a delayed write */
|
||
}
|
||
while (error == 0 && uio.uio_resid > 0 && count != 0);
|
||
if (error)
|
||
drive->lasterror = error;
|
||
return error; /* OK */
|
||
}
|
||
|
||
/* Wake up on completion */
|
||
void
|
||
drive_io_done(struct buf *bp)
|
||
{
|
||
wakeup((caddr_t) bp); /* Wachet auf! */
|
||
bp->b_flags &= ~B_CALL; /* don't do this again */
|
||
}
|
||
|
||
/* Check a drive for a vinum header. If found,
|
||
* update the drive information. We come here
|
||
* with a partially populated drive structure
|
||
* which includes the device name.
|
||
*
|
||
* Return information on what we found.
|
||
*
|
||
* This function is called from two places: check_drive,
|
||
* which wants to find out whether the drive is a
|
||
* Vinum drive, and config_drive, which asserts that
|
||
* it is a vinum drive. In the first case, we don't
|
||
* print error messages (verbose==0), in the second
|
||
* we do (verbose==1).
|
||
*/
|
||
enum drive_label_info
|
||
read_drive_label(struct drive *drive, int verbose)
|
||
{
|
||
int error;
|
||
int result; /* result of our search */
|
||
struct vinum_hdr *vhdr; /* and as header */
|
||
|
||
error = init_drive(drive, 0); /* find the drive */
|
||
if (error) /* find the drive */
|
||
return DL_CANT_OPEN; /* not ours */
|
||
|
||
vhdr = (struct vinum_hdr *) Malloc(VINUMHEADERLEN); /* allocate buffers */
|
||
CHECKALLOC(vhdr, "Can't allocate memory");
|
||
|
||
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 */
|
||
} else {
|
||
drive->state = drive_up; /* it's OK by us */
|
||
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;
|
||
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
|
||
*/
|
||
struct drive *
|
||
check_drive(char *drivename)
|
||
{
|
||
int driveno;
|
||
struct drive *drive;
|
||
|
||
driveno = find_drive_by_dev(drivename, 1); /* entry doesn't exist, create it */
|
||
drive = &vinum_conf.drive[driveno]; /* and get a pointer */
|
||
|
||
if (read_drive_label(drive, 0) != DL_OURS) { /* not ours */
|
||
if (drive->lasterror == 0)
|
||
drive->lasterror = ENODEV;
|
||
set_drive_state(drive->driveno, drive_down, setstate_force);
|
||
}
|
||
return drive;
|
||
}
|
||
|
||
static char *
|
||
sappend(char *txt, char *s)
|
||
{
|
||
while (*s++ = *txt++);
|
||
return s - 1;
|
||
}
|
||
|
||
/* Kludge: kernel printf doesn't handle quads */
|
||
static char *lltoa (long long l, char *s);
|
||
|
||
static char *lltoa (long long l, char *s)
|
||
{
|
||
if (l < 0)
|
||
{
|
||
*s++ = '-';
|
||
l = -l;
|
||
}
|
||
if (l > 9)
|
||
{
|
||
s = lltoa (l / 10, s);
|
||
l %= 10;
|
||
}
|
||
*s++ = l + '0';
|
||
return s;
|
||
}
|
||
/* Format the configuration in text form into the buffer
|
||
* at config. Don't go beyond len bytes
|
||
* XXX this stinks. Fix soon. */
|
||
void format_config (char *config, int len)
|
||
{
|
||
#if __FreeBSD__ == 2
|
||
BROKEN_GDB
|
||
#endif
|
||
int i;
|
||
int j;
|
||
char *s = config;
|
||
|
||
bzero (config, len);
|
||
|
||
#if 0 /* XXX die, die */
|
||
/* First write the drive configuration */
|
||
for (i = 0; i < vinum_conf.drives_used; i++)
|
||
{
|
||
struct drive *drive;
|
||
|
||
drive = &vinum_conf.drive [i];
|
||
if (drive->state != drive_unallocated)
|
||
{
|
||
sprintf (s,
|
||
"drive %s state %s device %s\n",
|
||
drive->label.name,
|
||
drive_state (drive->state),
|
||
drive->devicename);
|
||
while (*s)
|
||
s++; /* find the end */
|
||
if (s > &config [len - 80])
|
||
{
|
||
printf ("vinum: configuration data overflow\n");
|
||
return;
|
||
}
|
||
}
|
||
}
|
||
#endif
|
||
|
||
/* Then the volume configuration */
|
||
for (i = 0; i < vinum_conf.volumes_used; i++)
|
||
{
|
||
struct volume *vol;
|
||
|
||
vol = &vinum_conf.volume [i];
|
||
if (vol->state != volume_unallocated)
|
||
{
|
||
if (vol->preferred_plex >= 0) /* preferences, */
|
||
sprintf (s,
|
||
"volume %s state %s readpol prefer %s",
|
||
vol->name,
|
||
volume_state (vol->state),
|
||
vinum_conf.plex [vol->preferred_plex].name);
|
||
else /* default round-robin */
|
||
sprintf (s,
|
||
"volume %s state %s",
|
||
vol->name,
|
||
volume_state (vol->state));
|
||
while (*s)
|
||
s++; /* find the end */
|
||
#if 0
|
||
/* Do we need to state the plexes? */
|
||
for (j = 0; j < vol->plexes; j++)
|
||
{
|
||
sprintf (s, " plex %s", vinum_conf.plex [vol->plex [j]].name);
|
||
while (*s)
|
||
s++; /* find the end */
|
||
}
|
||
#endif
|
||
s = sappend ("\n", s);
|
||
if (s > &config [len - 80])
|
||
{
|
||
printf ("vinum: configuration data overflow\n");
|
||
return;
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Then the plex configuration */
|
||
for (i = 0; i < vinum_conf.plexes_used; i++)
|
||
{
|
||
struct plex *plex;
|
||
|
||
plex = &vinum_conf.plex [i];
|
||
if (plex->state != plex_unallocated)
|
||
{
|
||
sprintf (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 ((plex->organization == plex_striped)
|
||
#ifdef RAID5
|
||
|| (plex->organization == plex_raid5)
|
||
#endif
|
||
)
|
||
{
|
||
sprintf (s, "%db ", (int) plex->stripesize);
|
||
while (*s)
|
||
s++; /* find the end */
|
||
}
|
||
if (plex->volno >= 0) /* we have a volume */
|
||
sprintf (s, "vol %s ", vinum_conf.volume [plex->volno].name);
|
||
while (*s)
|
||
s++; /* find the end */
|
||
for (j = 0; j < plex->subdisks; j++)
|
||
{
|
||
sprintf (s, " sd %s", vinum_conf.sd [plex->sdnos [j]].name);
|
||
}
|
||
s = sappend ("\n", s);
|
||
if (s > &config [len - 80])
|
||
{
|
||
printf ("vinum: configuration data overflow\n");
|
||
return;
|
||
}
|
||
}
|
||
}
|
||
|
||
/* And finally the subdisk configuration */
|
||
for (i = 0; i < vinum_conf.subdisks_used; i++)
|
||
{
|
||
struct sd *sd = &vinum_conf.sd [i]; /* XXX */
|
||
if (vinum_conf.sd [i].state != sd_unallocated)
|
||
{
|
||
sprintf (s,
|
||
"sd name %s drive %s plex %s state %s len ",
|
||
sd->name,
|
||
vinum_conf.drive [sd->driveno].label.name,
|
||
vinum_conf.plex [sd->plexno].name,
|
||
sd_state (sd->state) );
|
||
while (*s)
|
||
s++; /* find the end */
|
||
s = lltoa (sd->sectors, s);
|
||
s = sappend ("b driveoffset ", s);
|
||
s = lltoa (sd->driveoffset, s);
|
||
s = sappend ("b plexoffset ", s);
|
||
s = lltoa (sd->plexoffset, s);
|
||
s = sappend ("b\n", s);
|
||
if (s > &config [len - 80])
|
||
{
|
||
printf ("vinum: configuration data overflow\n");
|
||
return;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
/* 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, 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_used; driveno++) {
|
||
drive = &vinum_conf.drive[driveno]; /* point to drive */
|
||
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') /* XXX we keep getting these nameless drives */
|
||
||(drive->label.name[0] == '\0')) { /* XXX we keep getting these nameless drives */
|
||
unlockdrive(drive);
|
||
printf("Removing incomplete drive, index %d\n", driveno);
|
||
if (drive->vp) /* how can it be open without a name? */
|
||
close_drive(drive);
|
||
free_drive(drive); /* get rid of it */
|
||
break;
|
||
}
|
||
if ((drive->vp == NULL) /* 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 */
|
||
}
|
||
if ((drive->state == drive_down) /* it's down */
|
||
&&(drive->vp != NULL)) { /* 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_uninit)) {
|
||
wlabel_on = 1; /* enable writing the label */
|
||
error = VOP_IOCTL(drive->vp, /* make the label writeable */
|
||
DIOCWLABEL,
|
||
(caddr_t) & wlabel_on,
|
||
FWRITE,
|
||
NOCRED,
|
||
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)
|
||
VOP_IOCTL(drive->vp, /* make the label non-writeable again */
|
||
DIOCWLABEL,
|
||
(caddr_t) & wlabel_on,
|
||
FWRITE,
|
||
NOCRED,
|
||
curproc);
|
||
unlockdrive(drive);
|
||
if (error) {
|
||
printf("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 */
|
||
}
|
||
}
|
||
}
|
||
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(struct volume *vol, 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, vol->name, min(sizeof(lp->d_packname), sizeof(vol->name)));
|
||
lp->d_rpm = 14400 * vol->plexes; /* to keep them guessing */
|
||
lp->d_interleave = 1;
|
||
lp->d_flags = 0;
|
||
|
||
/* Fitting unto the vine, a vinum has a single
|
||
* track with all its sectors */
|
||
lp->d_secsize = DEV_BSIZE; /* bytes per sector */
|
||
lp->d_nsectors = vol->size; /* data sectors per track */
|
||
lp->d_ntracks = 1; /* tracks per cylinder */
|
||
lp->d_ncylinders = 1; /* data cylinders per unit */
|
||
lp->d_secpercyl = vol->size; /* data sectors per cylinder */
|
||
lp->d_secperunit = vol->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 = vol->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 = vol->size;
|
||
lp->d_partitions[SWAP_PART].p_fstype = FS_SWAP; /* swap partition */
|
||
lp->d_partitions[LABEL_PART].p_size = vol->size;
|
||
lp->d_npartitions = LABEL_PART + 1;
|
||
strncpy(lp->d_packname, vol->name, min(sizeof(lp->d_packname), sizeof(vol->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_used) /* invalid volume */
|
||
return ENOENT;
|
||
|
||
vol = &VOL[volno]; /* volume in question */
|
||
if (vol->state == volume_unallocated) /* nothing there */
|
||
return ENOENT;
|
||
|
||
get_volume_label(vol, 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 = minor(vol->devno) | (CDEV_MAJOR << MAJORDEV_SHIFT); /* 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_flags |= B_BUSY | B_WRITE;
|
||
vinumstrategy(bp); /* write it out */
|
||
error = biowait(bp);
|
||
bp->b_flags |= B_INVAL | B_AGE;
|
||
brelse(bp);
|
||
return error;
|
||
}
|
||
|
||
/* Initialize a subdisk */
|
||
int
|
||
initsd(int sdno)
|
||
{
|
||
return 0;
|
||
}
|
||
|
||
/* Look at all disks on the system for vinum slices */
|
||
void
|
||
vinum_scandisk(char *drivename[], 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;
|
||
struct nameidata nd; /* mount point credentials */
|
||
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;
|
||
struct drive **volatile drivelist;
|
||
#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_KERNELOP | VF_READING_CONFIG; /* kernel operation: reading config */
|
||
|
||
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 = (struct drive **) Malloc(drives * DRIVEPARTS * sizeof(struct drive *));
|
||
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 */
|
||
|
||
for (part = 'a'; part < 'i'; part++)
|
||
if (part != 'c') { /* don't do the c partition */
|
||
snprintf(partname, /* /dev/sd0a */
|
||
DRIVENAMELEN,
|
||
"%s%c",
|
||
drivename[driveno],
|
||
part);
|
||
drive = check_drive(partname); /* try to open it */
|
||
if (drive->lasterror != 0) /* didn't work, */
|
||
free_drive(drive); /* get rid of it */
|
||
else if (drive->flags & VF_CONFIGURED) /* already read this config, */
|
||
printf("vinum: already read config from %s\n", /* say so */
|
||
drive->label.name);
|
||
else {
|
||
drivelist[gooddrives] = drive; /* keep a pointer to the drive */
|
||
drive->flags &= ~VF_NEWBORN; /* which is no longer newly born */
|
||
gooddrives++;
|
||
}
|
||
}
|
||
}
|
||
|
||
if (gooddrives == 0) {
|
||
printf("vinum: no drives found\n");
|
||
return;
|
||
}
|
||
/* 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(struct drive *), 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 = drivelist[driveno];
|
||
|
||
if (firsttime && (driveno == 0)) /* we've never configured before, */
|
||
printf("vinum: reading configuration from %s\n", drive->devicename);
|
||
else
|
||
printf("vinum: updating configuration from %s\n", drive->devicename);
|
||
|
||
/* Read in both copies of the configuration information */
|
||
error = read_drive(drive, config_text, MAXCONFIG * 2, VINUM_CONFIG_OFFSET);
|
||
|
||
if (error != 0) {
|
||
printf("vinum: Can't read device %s, error %d\n", drive->devicename, error);
|
||
Free(config_text);
|
||
Free(config_line);
|
||
free_drive(drive); /* give it back */
|
||
status = error;
|
||
}
|
||
/* XXX 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 {
|
||
/* 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 */
|
||
printf("vinum: Config error on drive %s, aborting integration\n", nd.ni_dirp);
|
||
Free(config_text);
|
||
Free(config_line);
|
||
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_KERNELOP | VF_READING_CONFIG);
|
||
if (status != 0)
|
||
throw_rude_remark(status, "Couldn't read configuration");
|
||
updateconfig(VF_KERNELOP); /* update from kernel space */
|
||
}
|
||
|
||
/* 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)
|
||
{
|
||
struct drive *a = *(struct drive **) va;
|
||
struct drive *b = *(struct drive **) 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;
|
||
}
|