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Several more changes. First of all, move CTRL_MODE to have I/O behaviour 

like a no-rewind device. Secondly figure out whether the initial TUR
for a CTRL_MODE open resulted in a tape being actually found (if so,
then do a mount session).

Move the 'sun compatibility' behaviour into stdone && stclose- don't
mark a tape as having been written in stopenm, fer gosh sakes.
This commit is contained in:
mjacob 1998-07-31 04:00:22 +00:00
parent 03ffe0a516
commit b90b2a3798
1 changed files with 56 additions and 41 deletions
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97
sys/dev/scsipi/st.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: st.c,v 1.95 1998/07/30 04:11:43 mjacob Exp $ */
/* $NetBSD: st.c,v 1.96 1998/07/31 04:00:22 mjacob Exp $ */
/*
* Copyright (c) 1994 Charles Hannum. All rights reserved.
@ -94,11 +94,6 @@
#define ST_CTL_TIME (30 * 1000) /* 30 seconds */
#define ST_SPC_TIME (4 * 60 * 60 * 1000) /* 4 hours */
/*
* Maximum density code known.
*/
#define SCSI_2_MAX_DENSITY_CODE 0x45
/*
* Define various devices that we know mis-behave in some way,
* and note how they are bad, so we can correct for them
@ -353,11 +348,7 @@ struct scsipi_device st_switch = {
st_interpret_sense,
ststart,
NULL,
#if NRND > 0
stdone, /* only needed to gather timing data for randomness */
#else
NULL,
#endif
stdone
};
#define ST_INFO_VALID 0x0001
@ -572,6 +563,7 @@ stopen(dev, flags, mode, p)
SC_DEBUG(sc_link, SDEV_DB1, ("open: dev=0x%x (unit %d (of %d))\n", dev,
unit, st_cd.cd_ndevs));
/*
* Only allow one at a time
*/
@ -580,27 +572,36 @@ stopen(dev, flags, mode, p)
return (EBUSY);
}
/*
* clear any latched errors.
*/
st->mt_resid = 0;
st->mt_erreg = 0;
/*
* Catch any unit attention errors.
*/
error = scsipi_test_unit_ready(sc_link, SCSI_IGNORE_MEDIA_CHANGE |
(stmode == CTRL_MODE ? SCSI_IGNORE_NOT_READY : 0));
if (error)
(stmode == CTRL_MODE ? SCSI_SILENT : 0));
if (error && stmode != CTRL_MODE) {
goto bad;
}
sc_link->flags |= SDEV_OPEN; /* unit attn are now errors */
/*
* If the mode is 3 (e.g. minor = 3,7,11,15)
* then the device has been opened to set defaults
* and perform other, usually non-I/O related, operations.
* If the mode is 3 (e.g. minor = 3,7,11,15) then the device has
* been opened to set defaults and perform other, usually non-I/O
* related, operations. In this case, do a quick check to see
* whether the unit actually had a tape loaded (this will be known
* as to whether or not we got a NOT READY for the above
* unit attention). If a tape is there, go do a mount sequence.
*/
if (stmode == CTRL_MODE) {
if (stmode == CTRL_MODE && st->mt_erreg == SKEY_NOT_READY) {
return (0);
}
/*
* if it's a different mode, or if the media has been
* If it's a different mode, or if the media has been
* invalidated, unmount the tape from the previous
* session but continue with open processing
*/
@ -616,14 +617,6 @@ stopen(dev, flags, mode, p)
st->last_dsty = dsty;
}
/*
* Make sure that a tape opened in write-only mode will have
* file marks written on it when closed, even if not written to.
* This is for SUN compatibility
*/
if ((flags & O_ACCMODE) == FWRITE)
st->flags |= ST_WRITTEN;
SC_DEBUG(sc_link, SDEV_DB2, ("open complete\n"));
return (0);
@ -644,17 +637,35 @@ stclose(dev, flags, mode, p)
int mode;
struct proc *p;
{
int stxx;
struct st_softc *st = st_cd.cd_devs[STUNIT(dev)];
SC_DEBUG(st->sc_link, SDEV_DB1, ("closing\n"));
if ((st->flags & (ST_WRITTEN | ST_FM_WRITTEN)) == ST_WRITTEN)
/*
* Make sure that a tape opened in write-only mode will have
* file marks written on it when closed, even if not written to.
*
* This is for SUN compatibility. Actually, the Sun way of
* things is to:
*
* only write filemarks if there are fmks to be written and
* - open for write (possibly read/write)
* - the last operation was a write
* or:
* - opened for wronly
* - no data was written (including filemarks)
*/
stxx = st->flags & (ST_WRITTEN | ST_FM_WRITTEN);
if (stxx == ST_WRITTEN || ((flags & O_ACCMODE) == FWRITE && stxx == 0))
st_write_filemarks(st, 1, 0);
switch (STMODE(dev)) {
case NORMAL_MODE:
case CTRL_MODE: /* for now */
st_unmount(st, NOEJECT);
break;
case NOREW_MODE:
case CTRL_MODE:
/* leave mounted unless media seems to have been removed */
if (!(st->sc_link->flags & SDEV_MEDIA_LOADED))
st_unmount(st, NOEJECT);
@ -1089,7 +1100,6 @@ ststart(v)
if ((bp->b_flags & B_READ) == B_WRITE) {
cmd.opcode = WRITE;
st->flags &= ~ST_FM_WRITTEN;
st->flags |= ST_WRITTEN;
flags = SCSI_DATA_OUT;
} else {
cmd.opcode = READ;
@ -1117,17 +1127,21 @@ ststart(v)
} /* go back and see if we can cram more work in.. */
}
#if NRND > 0
void
stdone(xs)
struct scsipi_xfer *xs;
{
struct st_softc *st = xs->sc_link->device_softc;
if (xs->bp != NULL)
if (xs->bp != NULL) {
struct st_softc *st = xs->sc_link->device_softc;
if ((xs->bp->b_flags & B_READ) == B_WRITE) {
st->flags |= ST_WRITTEN;
}
#if NRND > 0
rnd_add_uint32(&st->rnd_source, xs->bp->b_blkno);
}
#endif
}
}
int
stread(dev, uio, iomode)
@ -2096,13 +2110,6 @@ st_interpret_sense(xs)
u_int8_t key;
int32_t info;
/*
* If the device is not open yet, let generic handle
*/
if ((sc_link->flags & SDEV_OPEN) == 0) {
return (retval);
}
/*
* If it isn't a extended or extended/deferred error, let
* the generic code handle it.
@ -2120,6 +2127,14 @@ st_interpret_sense(xs)
st->mt_erreg = key;
st->mt_resid = (short) info;
/*
* If the device is not open yet, let generic handle
*/
if ((sc_link->flags & SDEV_OPEN) == 0) {
return (retval);
}
if (st->flags & ST_FIXEDBLOCKS) {
xs->resid = info * st->blksize;
if (sense->flags & SSD_EOM) {