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Implement dump function for ATA RAID's. Minor fixes by me...

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Submitted by: Tor Egge <Tor.Egge@cvsup.no.freebsd.org>
This commit is contained in:
sos 2003-05-04 12:16:47 +00:00
parent 34cf7a7cc5
commit 0d0a999ff9
1 changed files with 128 additions and 0 deletions
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128
sys/dev/ata/ata-raid.c
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@ -52,6 +52,7 @@
/* device structures */
static disk_strategy_t arstrategy;
static dumper_t ardump;
/* prototypes */
static void ar_attach_raid(struct ar_softc *, int);
@ -169,6 +170,7 @@ ar_attach_raid(struct ar_softc *rdp, int update)
ar_config_changed(rdp, update);
rdp->disk.d_strategy = arstrategy;
rdp->disk.d_dump = ardump;
rdp->disk.d_name = "ar";
rdp->disk.d_sectorsize = DEV_BSIZE;
rdp->disk.d_mediasize = (off_t)rdp->total_sectors * DEV_BSIZE;
@ -505,6 +507,132 @@ ata_raid_rebuild(int array)
"rebuilding ar%d", array);
}
static int
ardump(void *arg, void *virtual, vm_offset_t physical,
off_t offset, size_t length)
{
struct ar_softc *rdp;
struct disk *dp, *ap;
vm_offset_t pdata;
caddr_t vdata;
int blkno, count, chunk, error1, error2, lba, lbs, tmplba;
int drv = 0;
dp = arg;
rdp = dp->d_drv1;
if (!rdp || !(rdp->flags & AR_F_READY))
return ENXIO;
if (length == 0) {
for (drv = 0; drv < rdp->total_disks; drv++) {
if (rdp->disks[drv].flags & AR_DF_ONLINE) {
ap = &AD_SOFTC(rdp->disks[drv])->disk;
(void) ap->d_dump(ap, NULL, 0, 0, 0);
}
}
return 0;
}
blkno = offset / DEV_BSIZE;
vdata = virtual;
pdata = physical;
for (count = howmany(length, DEV_BSIZE); count > 0;
count -= chunk, blkno += chunk, vdata += (chunk * DEV_BSIZE),
pdata += (chunk * DEV_BSIZE)) {
switch (rdp->flags & (AR_F_RAID0 | AR_F_RAID1 | AR_F_SPAN)) {
case AR_F_SPAN:
lba = blkno;
while (lba >= AD_SOFTC(rdp->disks[drv])->total_secs-rdp->reserved)
lba -= AD_SOFTC(rdp->disks[drv++])->total_secs-rdp->reserved;
chunk = min(AD_SOFTC(rdp->disks[drv])->total_secs-rdp->reserved-lba,
count);
break;
case AR_F_RAID0:
case AR_F_RAID0 | AR_F_RAID1:
tmplba = blkno / rdp->interleave;
chunk = blkno % rdp->interleave;
if (blkno >= (rdp->total_sectors / (rdp->interleave * rdp->width)) *
(rdp->interleave * rdp->width) ) {
lbs = (rdp->total_sectors -
((rdp->total_sectors / (rdp->interleave * rdp->width)) *
(rdp->interleave * rdp->width))) / rdp->width;
drv = (blkno -
((rdp->total_sectors / (rdp->interleave * rdp->width)) *
(rdp->interleave * rdp->width))) / lbs;
lba = ((tmplba / rdp->width) * rdp->interleave) +
(blkno - ((tmplba / rdp->width) * rdp->interleave)) % lbs;
chunk = min(count, lbs);
}
else {
drv = tmplba % rdp->width;
lba = ((tmplba / rdp->width) * rdp->interleave) + chunk;
chunk = min(count, rdp->interleave - chunk);
}
break;
case AR_F_RAID1:
drv = 0;
lba = blkno;
chunk = count;
break;
default:
printf("ar%d: unknown array type in ardump\n", rdp->lun);
return EIO;
}
if (drv > 0)
lba += rdp->offset;
switch (rdp->flags & (AR_F_RAID0 | AR_F_RAID1 | AR_F_SPAN)) {
case AR_F_SPAN:
case AR_F_RAID0:
if (rdp->disks[drv].flags & AR_DF_ONLINE) {
ap = &AD_SOFTC(rdp->disks[drv])->disk;
error1 = ap->d_dump(ap, vdata, pdata,
(off_t) lba * DEV_BSIZE,
chunk * DEV_BSIZE);
} else
error1 = EIO;
if (error1)
return error1;
break;
case AR_F_RAID1:
case AR_F_RAID0 | AR_F_RAID1:
if ((rdp->disks[drv].flags & AR_DF_ONLINE) ||
((rdp->flags & AR_F_REBUILDING) &&
(rdp->disks[drv].flags & AR_DF_SPARE))) {
ap = &AD_SOFTC(rdp->disks[drv])->disk;
error1 = ap->d_dump(ap, vdata, pdata,
(off_t) lba * DEV_BSIZE,
chunk * DEV_BSIZE);
} else
error1 = EIO;
if ((rdp->disks[drv + rdp->width].flags & AR_DF_ONLINE) ||
((rdp->flags & AR_F_REBUILDING) &&
(rdp->disks[drv + rdp->width].flags & AR_DF_SPARE))) {
ap = &AD_SOFTC(rdp->disks[drv + rdp->width])->disk;
error2 = ap->d_dump(ap, vdata, pdata,
(off_t) lba * DEV_BSIZE,
chunk * DEV_BSIZE);
} else
error2 = EIO;
if (error1 && error2)
return error1;
break;
default:
printf("ar%d: unknown array type in ardump\n", rdp->lun);
return EIO;
}
}
return 0;
}
static void
arstrategy(struct bio *bp)
{