4fd49b9f73
Tidy other comments. open_drive: don't call set_drive_state if we decide to take it down. This could help avoid some race conditions with the daemon. init_drive: don't set the drive down, we'll let close_locked_drive do that. close_locked_drive: set drive state to down without calling set_drive_state. This could help avoid some race conditions with the daemon. driveio: remove the function, it wasn't being used. get_volume_label: remove volume dependencies so that we can return a label for plexes and subdisks as well. What a kludge.
1048 lines
34 KiB
C
1048 lines
34 KiB
C
/*-
|
||
* Copyright (c) 1997, 1998
|
||
* Nan Yang Computer Services Limited. All rights reserved.
|
||
*
|
||
* This software is distributed under the so-called ``Berkeley
|
||
* License'':
|
||
*
|
||
* Redistribution and use in source and binary forms, with or without
|
||
* modification, are permitted provided that the following conditions
|
||
* are met:
|
||
* 1. Redistributions of source code must retain the above copyright
|
||
* notice, this list of conditions and the following disclaimer.
|
||
* 2. Redistributions in binary form must reproduce the above copyright
|
||
* notice, this list of conditions and the following disclaimer in the
|
||
* documentation and/or other materials provided with the distribution.
|
||
* 3. All advertising materials mentioning features or use of this software
|
||
* must display the following acknowledgement:
|
||
* This product includes software developed by Nan Yang Computer
|
||
* Services Limited.
|
||
* 4. Neither the name of the Company nor the names of its contributors
|
||
* may be used to endorse or promote products derived from this software
|
||
* without specific prior written permission.
|
||
*
|
||
* This software is provided ``as is'', and any express or implied
|
||
* warranties, including, but not limited to, the implied warranties of
|
||
* merchantability and fitness for a particular purpose are disclaimed.
|
||
* In no event shall the company or contributors be liable for any
|
||
* direct, indirect, incidental, special, exemplary, or consequential
|
||
* damages (including, but not limited to, procurement of substitute
|
||
* goods or services; loss of use, data, or profits; or business
|
||
* interruption) however caused and on any theory of liability, whether
|
||
* in contract, strict liability, or tort (including negligence or
|
||
* otherwise) arising in any way out of the use of this software, even if
|
||
* advised of the possibility of such damage.
|
||
*
|
||
* $Id: vinumio.c,v 1.25 1999/06/28 02:37:48 grog Exp grog $
|
||
*/
|
||
|
||
#include <dev/vinum/vinumhdr.h>
|
||
#include <dev/vinum/request.h>
|
||
|
||
static char *sappend(char *txt, char *s);
|
||
static int drivecmp(const void *va, const void *vb);
|
||
|
||
/*
|
||
* Open the device associated with the drive, and set drive's vp.
|
||
* Return an error number
|
||
*/
|
||
int
|
||
open_drive(struct drive *drive, struct proc *p, int verbose)
|
||
{
|
||
struct nameidata nd;
|
||
int error;
|
||
|
||
if (drive->devicename[0] != '/') /* no device name */
|
||
sprintf(drive->devicename, "/dev/%s", drive->label.name); /* get it from the drive name */
|
||
NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, drive->devicename, p);
|
||
error = vn_open(&nd, FREAD | FWRITE, 0); /* open the device */
|
||
if (error != 0) { /* can't open? */
|
||
set_drive_state(drive->driveno, drive_down, setstate_force);
|
||
drive->lasterror = error;
|
||
if (verbose)
|
||
log(LOG_WARNING,
|
||
"vinum open_drive %s: failed with error %d\n",
|
||
drive->devicename, error);
|
||
return error;
|
||
}
|
||
drive->vp = nd.ni_vp;
|
||
drive->p = p;
|
||
|
||
if (drive->vp->v_usecount > 1) { /* already in use? */
|
||
if (verbose)
|
||
log(LOG_WARNING,
|
||
"open_drive %s: use count %d, ignoring\n",
|
||
drive->devicename,
|
||
drive->vp->v_usecount);
|
||
}
|
||
if (drive->vp->v_type != VBLK) { /* only consider block devices */
|
||
VOP_UNLOCK(drive->vp, 0, drive->p);
|
||
close_drive(drive);
|
||
drive->lasterror = ENOTBLK;
|
||
if (verbose)
|
||
log(LOG_WARNING,
|
||
"vinum open_drive %s: Not a block device\n",
|
||
drive->devicename);
|
||
return ENOTBLK;
|
||
}
|
||
drive->vp->v_numoutput = 0;
|
||
VOP_UNLOCK(drive->vp, 0, drive->p);
|
||
return 0;
|
||
}
|
||
|
||
/*
|
||
* Set some variables in the drive struct
|
||
* in more convenient form. Return error indication
|
||
*/
|
||
int
|
||
set_drive_parms(struct drive *drive)
|
||
{
|
||
drive->blocksize = BLKDEV_IOSIZE; /* do we need this? */
|
||
drive->secsperblock = drive->blocksize /* number of sectors per block */
|
||
/ drive->partinfo.disklab->d_secsize;
|
||
|
||
/* Now update the label part */
|
||
bcopy(hostname, drive->label.sysname, VINUMHOSTNAMELEN); /* put in host name */
|
||
getmicrotime(&drive->label.date_of_birth); /* and current time */
|
||
drive->label.drive_size = ((u_int64_t) drive->partinfo.part->p_size) /* size of the drive in bytes */
|
||
*((u_int64_t) drive->partinfo.disklab->d_secsize);
|
||
#if VINUMDEBUG
|
||
if (debug & DEBUG_BIGDRIVE) /* pretend we're 100 times as big */
|
||
drive->label.drive_size *= 100;
|
||
#endif
|
||
|
||
/* number of sectors available for subdisks */
|
||
drive->sectors_available = drive->label.drive_size / DEV_BSIZE - DATASTART;
|
||
|
||
/*
|
||
* Bug in 3.0 as of January 1998: you can open
|
||
* non-existent slices. They have a length of 0.
|
||
*/
|
||
if (drive->label.drive_size < MINVINUMSLICE) { /* too small to worry about */
|
||
set_drive_state(drive->driveno, drive_down, setstate_force);
|
||
drive->lasterror = ENOSPC;
|
||
return ENOSPC;
|
||
}
|
||
drive->freelist_size = INITIAL_DRIVE_FREELIST; /* initial number of entries */
|
||
drive->freelist = (struct drive_freelist *)
|
||
Malloc(INITIAL_DRIVE_FREELIST * sizeof(struct drive_freelist));
|
||
if (drive->freelist == NULL) /* can't malloc, dammit */
|
||
return ENOSPC;
|
||
drive->freelist_entries = 1; /* just (almost) the complete drive */
|
||
drive->freelist[0].offset = DATASTART; /* starts here */
|
||
drive->freelist[0].sectors = (drive->label.drive_size >> DEV_BSHIFT) - DATASTART; /* and it's this long */
|
||
if (drive->label.name[0] != '\0') /* got a name */
|
||
set_drive_state(drive->driveno, drive_up, setstate_force); /* our drive is accessible */
|
||
else /* we know about it, but that's all */
|
||
drive->state = drive_referenced;
|
||
return 0;
|
||
}
|
||
|
||
/*
|
||
* Initialize a drive: open the device and add device
|
||
* information
|
||
*/
|
||
int
|
||
init_drive(struct drive *drive, int verbose)
|
||
{
|
||
int error;
|
||
|
||
if (drive->devicename[0] != '/') {
|
||
drive->lasterror = EINVAL;
|
||
log(LOG_ERR, "vinum: Can't open drive without drive name\n");
|
||
return EINVAL;
|
||
}
|
||
error = open_drive(drive, curproc, verbose); /* open the drive */
|
||
if (error)
|
||
return error;
|
||
|
||
error = VOP_IOCTL(drive->vp, /* get the partition information */
|
||
DIOCGPART,
|
||
(caddr_t) & drive->partinfo,
|
||
FREAD,
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||
NOCRED,
|
||
curproc);
|
||
if (error) {
|
||
if (verbose)
|
||
log(LOG_WARNING,
|
||
"vinum open_drive %s: Can't get partition information, error %d\n",
|
||
drive->devicename,
|
||
error);
|
||
close_drive(drive);
|
||
drive->lasterror = error;
|
||
return error;
|
||
}
|
||
if (drive->partinfo.part->p_fstype != FS_VINUM) { /* not Vinum */
|
||
drive->lasterror = EFTYPE;
|
||
if (verbose)
|
||
log(LOG_WARNING,
|
||
"vinum open_drive %s: Wrong partition type for vinum\n",
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||
drive->devicename);
|
||
close_drive(drive);
|
||
return EFTYPE;
|
||
}
|
||
return set_drive_parms(drive); /* set various odds and ends */
|
||
}
|
||
|
||
/* Close a drive if it's open. */
|
||
void
|
||
close_drive(struct drive *drive)
|
||
{
|
||
LOCKDRIVE(drive); /* keep the daemon out */
|
||
if (drive->vp)
|
||
close_locked_drive(drive); /* and close it */
|
||
drive->state = drive_down; /* don't tell the system about this one at all */
|
||
unlockdrive(drive);
|
||
}
|
||
|
||
/*
|
||
* Real drive close code, called with drive already locked.
|
||
* We have also checked that the drive is open. No errors.
|
||
*/
|
||
void
|
||
close_locked_drive(struct drive *drive)
|
||
{
|
||
/*
|
||
* If we can't access the drive, we can't flush
|
||
* the queues, which spec_close() will try to
|
||
* do. Get rid of them here first.
|
||
*/
|
||
if (drive->state < drive_up) { /* we can't access the drive, */
|
||
vn_lock(drive->vp, LK_EXCLUSIVE | LK_RETRY, drive->p);
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||
vinvalbuf(drive->vp, 0, NOCRED, drive->p, 0, 0);
|
||
VOP_UNLOCK(drive->vp, 0, drive->p);
|
||
}
|
||
vn_close(drive->vp, FREAD | FWRITE, NOCRED, drive->p);
|
||
#ifdef VINUMDEBUG
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||
if ((debug & DEBUG_WARNINGS) /* want to hear about them */
|
||
&&(drive->vp->v_usecount)) /* shouldn't happen */
|
||
log(LOG_WARNING,
|
||
"close_drive %s: use count still %d\n",
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||
drive->devicename,
|
||
drive->vp->v_usecount);
|
||
#endif
|
||
drive->vp = NULL;
|
||
}
|
||
|
||
/*
|
||
* Remove drive from the configuration.
|
||
* Caller must ensure that it isn't active
|
||
*/
|
||
void
|
||
remove_drive(int driveno)
|
||
{
|
||
struct drive *drive = &vinum_conf.drive[driveno];
|
||
long long int nomagic = VINUM_NOMAGIC; /* no magic number */
|
||
|
||
if (drive->state > drive_referenced) { /* real drive */
|
||
if (drive->state == drive_up)
|
||
write_drive(drive, /* obliterate the magic, but leave a hint */
|
||
(char *) &nomagic,
|
||
8,
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||
VINUM_LABEL_OFFSET);
|
||
free_drive(drive); /* close it and free resources */
|
||
save_config(); /* and save the updated configuration */
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||
}
|
||
}
|
||
|
||
/*
|
||
* Read data from a drive
|
||
*
|
||
* Return error number
|
||
*/
|
||
int
|
||
read_drive(struct drive *drive, void *buf, size_t length, off_t offset)
|
||
{
|
||
int error;
|
||
struct buf *bp;
|
||
daddr_t nextbn;
|
||
long bscale;
|
||
|
||
struct uio uio;
|
||
struct iovec iov;
|
||
daddr_t blocknum; /* block number */
|
||
int blockoff; /* offset in block */
|
||
int count; /* amount to transfer */
|
||
|
||
iov.iov_base = buf;
|
||
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_READ;
|
||
uio.uio_procp = curproc;
|
||
|
||
bscale = btodb(drive->blocksize); /* mask off offset from block number */
|
||
do {
|
||
blocknum = btodb(uio.uio_offset) & ~(bscale - 1); /* 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 (drive->vp->v_lastr + bscale == blocknum) { /* did our last read finish in this block? */
|
||
nextbn = blocknum + bscale; /* note the end of the transfer */
|
||
error = breadn(drive->vp, /* and read with read-ahead */
|
||
blocknum,
|
||
(int) drive->blocksize,
|
||
&nextbn,
|
||
(int *) &drive->blocksize,
|
||
1,
|
||
NOCRED,
|
||
&bp);
|
||
} else /* random read: just read this block */
|
||
error = bread(drive->vp, blocknum, (int) drive->blocksize, NOCRED, &bp);
|
||
drive->vp->v_lastr = blocknum; /* note the last block we read */
|
||
count = min(count, drive->blocksize - bp->b_resid);
|
||
if (error) {
|
||
brelse(bp);
|
||
return error;
|
||
}
|
||
error = uiomove((char *) bp->b_data + blockoff, count, &uio); /* move the data */
|
||
brelse(bp);
|
||
}
|
||
while (error == 0 && uio.uio_resid > 0 && count != 0);
|
||
return error;
|
||
}
|
||
|
||
/*
|
||
* Write data to a drive
|
||
*
|
||
* Return error number
|
||
*/
|
||
int
|
||
write_drive(struct drive *drive, void *buf, size_t length, off_t offset)
|
||
{
|
||
int error;
|
||
struct buf *bp;
|
||
struct uio uio;
|
||
struct iovec iov;
|
||
daddr_t blocknum; /* block number */
|
||
int blockoff; /* offset in block */
|
||
int count; /* amount to transfer */
|
||
int blockshift;
|
||
|
||
if (drive->state == drive_down) /* currently down */
|
||
return 0; /* ignore */
|
||
if (drive->vp == NULL) {
|
||
drive->lasterror = ENODEV;
|
||
return ENODEV; /* not configured yet */
|
||
}
|
||
iov.iov_base = buf;
|
||
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;
|
||
|
||
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; /* 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) { /* not 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;
|
||
set_drive_state(drive->driveno, drive_down, setstate_force);
|
||
}
|
||
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 */
|
||
if (vol->preferred_plex >= 0) /* preferences, */
|
||
snprintf(s,
|
||
configend - 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 */
|
||
snprintf(s,
|
||
configend - s,
|
||
"volume %s state %s",
|
||
vol->name,
|
||
volume_state(vol->state));
|
||
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 ((plex->organization == plex_striped)
|
||
|| (plex->organization == plex_raid5)) {
|
||
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;
|
||
|
||
sd = &SD[i];
|
||
if ((sd->state != sd_referenced)
|
||
&& (sd->name[0] != '\0')) { /* paranoia */
|
||
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,
|
||
vinum_conf.drive[sd->driveno].label.name,
|
||
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,
|
||
vinum_conf.drive[sd->driveno].label.name,
|
||
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->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 */
|
||
continue;
|
||
}
|
||
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_referenced)) { /* and it's a real drive */
|
||
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) {
|
||
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;
|
||
|
||
/*
|
||
* 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 = 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(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_flags |= 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 */
|
||
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;
|
||
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;
|
||
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, */
|
||
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 (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);
|
||
|
||
/* Read in both copies of the configuration information */
|
||
error = read_drive(drive, config_text, MAXCONFIG * 2, VINUM_CONFIG_OFFSET);
|
||
|
||
if (error != 0) {
|
||
log(LOG_ERR, "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;
|
||
}
|
||
/*
|
||
* 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 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_READING_CONFIG; /* no longer reading from disk */
|
||
if (status != 0)
|
||
throw_rude_remark(status, "Couldn't read configuration");
|
||
updateconfig(VF_READING_CONFIG); /* update from disk config */
|
||
return 0;
|
||
}
|
||
|
||
/*
|
||
* 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: */
|