void
sdminphys(struct buf *bp)
{
struct sd_softc *sc;
long max;
sc = sdlookup(DISKUNIT(bp->b_dev));
if (sc == NULL)
return; /* XXX - right way to fail this? */
/*
* If the device is ancient, we want to make sure that
* the transfer fits into a 6-byte cdb.
*
* XXX Note that the SCSI-I spec says that 256-block transfers
* are allowed in a 6-byte read/write, and are specified
* by setting the "length" to 0. However, we're conservative
* here, allowing only 255-block transfers in case an
* ancient device gets confused by length == 0. A length of 0
* in a 10-byte read/write actually means 0 blocks.
*/
if (sc->flags & SDF_ANCIENT) {
max = sc->sc_dk.dk_label->d_secsize * 0xff;
if (bp->b_bcount > max)
bp->b_bcount = max;
}
(*sc->sc_link->adapter->scsi_minphys)(bp, sc->sc_link);
device_unref(&sc->sc_dev);
}
/*
* Actually translate the requested transfer into one the physical driver
* can understand. The transfer is described by a buf and will include
* only one physical transfer.
*/
void
sdstrategy(struct buf *bp)
{
struct sd_softc *sc;
int s;
sc = sdlookup(DISKUNIT(bp->b_dev));
if (sc == NULL) {
bp->b_error = ENXIO;
goto bad;
}
if (sc->flags & SDF_DYING) {
bp->b_error = ENXIO;
goto bad;
}
SC_DEBUG(sc->sc_link, SDEV_DB2, ("sdstrategy: %ld bytes @ blk %lld\n",
bp->b_bcount, (long long)bp->b_blkno));
/*
* If the device has been made invalid, error out
*/
if ((sc->sc_link->flags & SDEV_MEDIA_LOADED) == 0) {
if (sc->sc_link->flags & SDEV_OPEN)
bp->b_error = EIO;
else
bp->b_error = ENODEV;
goto bad;
}
/* Validate the request. */
if (bounds_check_with_label(bp, sc->sc_dk.dk_label) == -1)
goto done;
/* Place it in the queue of disk activities for this disk. */
bufq_queue(&sc->sc_bufq, bp);
/*
* Tell the device to get going on the transfer if it's
* not doing anything, otherwise just wait for completion
*/
scsi_xsh_add(&sc->sc_xsh);
device_unref(&sc->sc_dev);
return;
bad:
bp->b_flags |= B_ERROR;
bp->b_resid = bp->b_bcount;
done:
s = splbio();
biodone(bp);
splx(s);
if (sc != NULL)
device_unref(&sc->sc_dev);
}
/*
* Close the device. Only called if we are the last occurrence of an open
* device. Convenient now but usually a pain.
*/
int
sdclose(dev_t dev, int flag, int fmt, struct proc *p)
{
struct sd_softc *sc;
int part = DISKPART(dev);
int error;
sc = sdlookup(DISKUNIT(dev));
if (sc == NULL)
return (ENXIO);
if (sc->flags & SDF_DYING) {
device_unref(&sc->sc_dev);
return (ENXIO);
}
if ((error = sdlock(sc)) != 0) {
device_unref(&sc->sc_dev);
return (error);
}
switch (fmt) {
case S_IFCHR:
sc->sc_dk.dk_copenmask &= ~(1 << part);
break;
case S_IFBLK:
sc->sc_dk.dk_bopenmask &= ~(1 << part);
break;
}
sc->sc_dk.dk_openmask = sc->sc_dk.dk_copenmask | sc->sc_dk.dk_bopenmask;
if (sc->sc_dk.dk_openmask == 0) {
if ((sc->flags & SDF_DIRTY) != 0)
sd_flush(sc, 0);
if ((sc->sc_link->flags & SDEV_REMOVABLE) != 0)
scsi_prevent(sc->sc_link, PR_ALLOW,
SCSI_IGNORE_ILLEGAL_REQUEST |
SCSI_IGNORE_NOT_READY | SCSI_SILENT);
sc->sc_link->flags &= ~(SDEV_OPEN | SDEV_MEDIA_LOADED);
if (sc->sc_link->flags & SDEV_EJECTING) {
scsi_start(sc->sc_link, SSS_STOP|SSS_LOEJ, 0);
sc->sc_link->flags &= ~SDEV_EJECTING;
}
timeout_del(&sc->sc_timeout);
}
sdunlock(sc);
device_unref(&sc->sc_dev);
return 0;
}
/*
* Close the device. Only called if we are the last occurrence of an open
* device. Convenient now but usually a pain.
*/
int
sdclose(dev_t dev, int flag, int fmt, struct proc *p)
{
struct sd_softc *sc;
int part = DISKPART(dev);
sc = sdlookup(DISKUNIT(dev));
if (sc == NULL)
return (ENXIO);
if (sc->flags & SDF_DYING) {
device_unref(&sc->sc_dev);
return (ENXIO);
}
disk_lock_nointr(&sc->sc_dk);
disk_closepart(&sc->sc_dk, part, fmt);
if (sc->sc_dk.dk_openmask == 0) {
if ((sc->flags & SDF_DIRTY) != 0)
sd_flush(sc, 0);
if ((sc->sc_link->flags & SDEV_REMOVABLE) != 0)
scsi_prevent(sc->sc_link, PR_ALLOW,
SCSI_IGNORE_ILLEGAL_REQUEST |
SCSI_IGNORE_NOT_READY | SCSI_SILENT);
sc->sc_link->flags &= ~(SDEV_OPEN | SDEV_MEDIA_LOADED);
if (sc->sc_link->flags & SDEV_EJECTING) {
scsi_start(sc->sc_link, SSS_STOP|SSS_LOEJ, 0);
sc->sc_link->flags &= ~SDEV_EJECTING;
}
timeout_del(&sc->sc_timeout);
scsi_xsh_del(&sc->sc_xsh);
}
disk_unlock(&sc->sc_dk);
device_unref(&sc->sc_dev);
return 0;
}
daddr_t
sdsize(dev_t dev)
{
struct disklabel *lp;
struct sd_softc *sc;
int part, omask;
daddr_t size;
sc = sdlookup(DISKUNIT(dev));
if (sc == NULL)
return -1;
if (sc->flags & SDF_DYING) {
size = -1;
goto exit;
}
part = DISKPART(dev);
omask = sc->sc_dk.dk_openmask & (1 << part);
if (omask == 0 && sdopen(dev, 0, S_IFBLK, NULL) != 0) {
size = -1;
goto exit;
}
lp = sc->sc_dk.dk_label;
if ((sc->sc_link->flags & SDEV_MEDIA_LOADED) == 0)
size = -1;
else if (lp->d_partitions[part].p_fstype != FS_SWAP)
size = -1;
else
size = DL_SECTOBLK(lp, DL_GETPSIZE(&lp->d_partitions[part]));
if (omask == 0 && sdclose(dev, 0, S_IFBLK, NULL) != 0)
size = -1;
exit:
device_unref(&sc->sc_dev);
return size;
}
/*
* Perform special action on behalf of the user
* Knows about the internals of this device
*/
int
sdioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p)
{
struct sd_softc *sc;
struct disklabel *lp;
int error = 0;
int part = DISKPART(dev);
sc = sdlookup(DISKUNIT(dev));
if (sc == NULL)
return (ENXIO);
if (sc->flags & SDF_DYING) {
device_unref(&sc->sc_dev);
return (ENXIO);
}
SC_DEBUG(sc->sc_link, SDEV_DB2, ("sdioctl 0x%lx\n", cmd));
/*
* If the device is not valid.. abandon ship
*/
if ((sc->sc_link->flags & SDEV_MEDIA_LOADED) == 0) {
switch (cmd) {
case DIOCLOCK:
case DIOCEJECT:
case SCIOCIDENTIFY:
case SCIOCCOMMAND:
case SCIOCDEBUG:
if (part == RAW_PART)
break;
/* FALLTHROUGH */
default:
if ((sc->sc_link->flags & SDEV_OPEN) == 0) {
error = ENODEV;
goto exit;
} else {
error = EIO;
goto exit;
}
}
}
switch (cmd) {
case DIOCRLDINFO:
lp = malloc(sizeof(*lp), M_TEMP, M_WAITOK);
sdgetdisklabel(dev, sc, lp, 0);
bcopy(lp, sc->sc_dk.dk_label, sizeof(*lp));
free(lp, M_TEMP);
goto exit;
case DIOCGPDINFO:
sdgetdisklabel(dev, sc, (struct disklabel *)addr, 1);
goto exit;
case DIOCGDINFO:
*(struct disklabel *)addr = *(sc->sc_dk.dk_label);
goto exit;
case DIOCGPART:
((struct partinfo *)addr)->disklab = sc->sc_dk.dk_label;
((struct partinfo *)addr)->part =
&sc->sc_dk.dk_label->d_partitions[DISKPART(dev)];
goto exit;
case DIOCWDINFO:
case DIOCSDINFO:
if ((flag & FWRITE) == 0) {
error = EBADF;
goto exit;
}
if ((error = disk_lock(&sc->sc_dk)) != 0)
goto exit;
error = setdisklabel(sc->sc_dk.dk_label,
(struct disklabel *)addr, sc->sc_dk.dk_openmask);
if (error == 0) {
if (cmd == DIOCWDINFO)
error = writedisklabel(DISKLABELDEV(dev),
sdstrategy, sc->sc_dk.dk_label);
}
disk_unlock(&sc->sc_dk);
goto exit;
case DIOCLOCK:
error = scsi_prevent(sc->sc_link,
(*(int *)addr) ? PR_PREVENT : PR_ALLOW, 0);
goto exit;
case MTIOCTOP:
if (((struct mtop *)addr)->mt_op != MTOFFL) {
error = EIO;
goto exit;
}
/* FALLTHROUGH */
case DIOCEJECT:
if ((sc->sc_link->flags & SDEV_REMOVABLE) == 0) {
error = ENOTTY;
goto exit;
}
sc->sc_link->flags |= SDEV_EJECTING;
goto exit;
case DIOCINQ:
error = scsi_do_ioctl(sc->sc_link, cmd, addr, flag);
if (error == ENOTTY)
error = sd_ioctl_inquiry(sc,
(struct dk_inquiry *)addr);
goto exit;
case DIOCSCACHE:
if (!ISSET(flag, FWRITE)) {
error = EBADF;
goto exit;
}
/* FALLTHROUGH */
case DIOCGCACHE:
error = sd_ioctl_cache(sc, cmd, (struct dk_cache *)addr);
goto exit;
case DIOCCACHESYNC:
if (!ISSET(flag, FWRITE)) {
error = EBADF;
goto exit;
}
if ((sc->flags & SDF_DIRTY) != 0 || *(int *)addr != 0)
error = sd_flush(sc, 0);
return (error);
default:
if (part != RAW_PART) {
error = ENOTTY;
goto exit;
}
error = scsi_do_ioctl(sc->sc_link, cmd, addr, flag);
}
exit:
device_unref(&sc->sc_dev);
return (error);
}
/*
* Open the device. Make sure the partition info is as up-to-date as can be.
*/
int
sdopen(dev_t dev, int flag, int fmt, struct proc *p)
{
struct scsi_link *sc_link;
struct sd_softc *sc;
int error = 0, part, rawopen, unit;
unit = DISKUNIT(dev);
part = DISKPART(dev);
rawopen = (part == RAW_PART) && (fmt == S_IFCHR);
sc = sdlookup(unit);
if (sc == NULL)
return (ENXIO);
sc_link = sc->sc_link;
if (sc->flags & SDF_DYING) {
device_unref(&sc->sc_dev);
return (ENXIO);
}
if (ISSET(flag, FWRITE) && ISSET(sc_link->flags, SDEV_READONLY)) {
device_unref(&sc->sc_dev);
return (EACCES);
}
SC_DEBUG(sc_link, SDEV_DB1,
("sdopen: dev=0x%x (unit %d (of %d), partition %d)\n", dev, unit,
sd_cd.cd_ndevs, part));
if ((error = disk_lock(&sc->sc_dk)) != 0) {
device_unref(&sc->sc_dev);
return (error);
}
if (sc->sc_dk.dk_openmask != 0) {
/*
* If any partition is open, but the disk has been invalidated,
* disallow further opens of non-raw partition.
*/
if ((sc_link->flags & SDEV_MEDIA_LOADED) == 0) {
if (rawopen)
goto out;
error = EIO;
goto bad;
}
} else {
/* Spin up non-UMASS devices ready or not. */
if ((sc->sc_link->flags & SDEV_UMASS) == 0)
scsi_start(sc_link, SSS_START, (rawopen ? SCSI_SILENT :
0) | SCSI_IGNORE_ILLEGAL_REQUEST |
SCSI_IGNORE_MEDIA_CHANGE);
/* Use sd_interpret_sense() for sense errors.
*
* But only after spinning the disk up! Just in case a broken
* device returns "Initialization command required." and causes
* a loop of scsi_start() calls.
*/
sc_link->flags |= SDEV_OPEN;
/*
* Try to prevent the unloading of a removable device while
* it's open. But allow the open to proceed if the device can't
* be locked in.
*/
if ((sc_link->flags & SDEV_REMOVABLE) != 0) {
scsi_prevent(sc_link, PR_PREVENT, SCSI_SILENT |
SCSI_IGNORE_ILLEGAL_REQUEST |
SCSI_IGNORE_MEDIA_CHANGE);
}
/* Check that it is still responding and ok. */
error = scsi_test_unit_ready(sc_link,
TEST_READY_RETRIES, SCSI_SILENT |
SCSI_IGNORE_ILLEGAL_REQUEST | SCSI_IGNORE_MEDIA_CHANGE);
if (error) {
if (rawopen) {
error = 0;
goto out;
} else
goto bad;
}
/* Load the physical device parameters. */
sc_link->flags |= SDEV_MEDIA_LOADED;
if (sd_get_parms(sc, &sc->params, (rawopen ? SCSI_SILENT : 0))
== SDGP_RESULT_OFFLINE) {
sc_link->flags &= ~SDEV_MEDIA_LOADED;
error = ENXIO;
goto bad;
}
SC_DEBUG(sc_link, SDEV_DB3, ("Params loaded\n"));
/* Load the partition info if not already loaded. */
if (sdgetdisklabel(dev, sc, sc->sc_dk.dk_label, 0) == EIO) {
error = EIO;
goto bad;
}
SC_DEBUG(sc_link, SDEV_DB3, ("Disklabel loaded\n"));
}
out:
if ((error = disk_openpart(&sc->sc_dk, part, fmt, 1)) != 0)
goto bad;
SC_DEBUG(sc_link, SDEV_DB3, ("open complete\n"));
/* It's OK to fall through because dk_openmask is now non-zero. */
bad:
if (sc->sc_dk.dk_openmask == 0) {
if ((sc->sc_link->flags & SDEV_REMOVABLE) != 0)
scsi_prevent(sc_link, PR_ALLOW, SCSI_SILENT |
SCSI_IGNORE_ILLEGAL_REQUEST |
SCSI_IGNORE_MEDIA_CHANGE);
sc_link->flags &= ~(SDEV_OPEN | SDEV_MEDIA_LOADED);
}
disk_unlock(&sc->sc_dk);
device_unref(&sc->sc_dev);
return (error);
}
/*
* Actually translate the requested transfer into one the physical driver
* can understand. The transfer is described by a buf and will include
* only one physical transfer.
*/
void
sdstrategy(struct buf *bp)
{
struct sd_softc *sc;
int s;
sc = sdlookup(DISKUNIT(bp->b_dev));
if (sc == NULL) {
bp->b_error = ENXIO;
goto bad;
}
if (sc->flags & SDF_DYING) {
bp->b_error = ENXIO;
goto bad;
}
SC_DEBUG(sc->sc_link, SDEV_DB2, ("sdstrategy: %ld bytes @ blk %d\n",
bp->b_bcount, bp->b_blkno));
/*
* If the device has been made invalid, error out
*/
if ((sc->sc_link->flags & SDEV_MEDIA_LOADED) == 0) {
if (sc->sc_link->flags & SDEV_OPEN)
bp->b_error = EIO;
else
bp->b_error = ENODEV;
goto bad;
}
/*
* If it's a null transfer, return immediately
*/
if (bp->b_bcount == 0)
goto done;
/*
* The transfer must be a whole number of sectors.
*/
if ((bp->b_bcount % sc->sc_dk.dk_label->d_secsize) != 0) {
bp->b_error = EINVAL;
goto bad;
}
/*
* Do bounds checking, adjust transfer. if error, process.
* If end of partition, just return.
*/
if (bounds_check_with_label(bp, sc->sc_dk.dk_label,
(sc->flags & (SDF_WLABEL|SDF_LABELLING)) != 0) <= 0)
goto done;
/*
* Place it in the queue of disk activities for this disk
*/
mtx_enter(&sc->sc_buf_mtx);
disksort(&sc->sc_buf_queue, bp);
mtx_leave(&sc->sc_buf_mtx);
/*
* Tell the device to get going on the transfer if it's
* not doing anything, otherwise just wait for completion
*/
sdstart(sc);
device_unref(&sc->sc_dev);
return;
bad:
bp->b_flags |= B_ERROR;
done:
/*
* Correctly set the buf to indicate a completed xfer
*/
bp->b_resid = bp->b_bcount;
s = splbio();
biodone(bp);
splx(s);
if (sc != NULL)
device_unref(&sc->sc_dev);
}
