Aren
/
NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

* st_touch_tape(): start probing at the block size from the sense data if 

we have it.

* st_unmount(): reset density to the device default. This prevents using
  stale density values after changing to a medium with different density.

  Section 9.3.3 of the SCSI specs states that a device shall return the
  density value specified in the last succesfull MODE SELECT after an
  unload operation, in case it is not able to automatically determine
  the density of the new medium.
This commit is contained in:
pk 2000-11-03 10:46:18 +00:00
parent e3aaa6c1ab
commit 4c7351ec7d
1 changed files with 39 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

52
sys/dev/scsipi/st.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: st.c,v 1.130 2000/11/03 10:22:02 pk Exp $ */
/* $NetBSD: st.c,v 1.131 2000/11/03 10:46:18 pk Exp $ */
/*-
* Copyright (c) 1998 The NetBSD Foundation, Inc.
@ -249,7 +249,7 @@ struct st_quirk_inquiry_pattern st_quirk_patterns[] = {
{0, 0, 0} /* minor 12-15 */
}}},
{{T_SEQUENTIAL, T_REMOV,
"STK", "9490", ""},
"STK", "9490", ""},
{ST_Q_FORCE_BLKSIZE, 0, {
{0, 0, 0}, /* minor 0-3 */
{0, 0, 0}, /* minor 4-7 */
@ -700,7 +700,7 @@ stopen(dev, flags, mode, p)
if (slpintr) {
goto bad;
}
}
}
/*
@ -825,7 +825,7 @@ stclose(dev, flags, mode, p)
* operation a write?
*
* Are there supposed to be 2FM at EOD?
*
*
* If both statements are true, then we backspace
* one filemark.
*/
@ -969,6 +969,23 @@ st_unmount(st, eject)
SC_DEBUG(sc_link, SDEV_DB1, ("unmounting\n"));
st_check_eod(st, FALSE, &nmarks, XS_CTL_IGNORE_NOT_READY);
st_rewind(st, 0, XS_CTL_IGNORE_NOT_READY);
/*
* Section 9.3.3 of the SCSI specs states that a device shall return
* the density value specified in the last succesfull MODE SELECT
* after an unload operation, in case it is not able to
* automatically determine the density of the new medium.
*
* So we instruct the device to use the default density, which will
* prevent the use of stale density values (in particular,
* in st_touch_tape().
*/
st->density = 0;
if (st_mode_select(st, 0) != 0) {
printf("%s: WARNING: cannot revert to default density\n",
st->sc_dev.dv_xname);
}
scsipi_prevent(sc_link, PR_ALLOW,
XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY);
if (eject)
@ -1253,7 +1270,7 @@ ststart(v)
}
/*
* If we are at EOM but have not reported it
* yet then we should report it now.
* yet then we should report it now.
*/
if (st->flags & (ST_EOM_PENDING|ST_EIO_PENDING)) {
bp->b_resid = bp->b_bcount;
@ -1833,7 +1850,7 @@ st_cmprss(st, onoff)
again:
bzero(&scsi_pdata, scsi_dlen);
error = scsipi_command(sc_link,
(struct scsipi_generic *)&scmd, sizeof(scmd),
(struct scsipi_generic *)&scmd, sizeof(scmd),
(u_char *)&scsi_pdata, scsi_dlen,
ST_RETRIES, ST_CTL_TIME, NULL,
flags | XS_CTL_DATA_IN | XS_CTL_DATA_ONSTACK);
@ -2484,7 +2501,7 @@ st_interpret_sense(xs)
xs->sc_link->sc_print_addr(xs->sc_link);
printf("Sense Key 0x%02x", key);
if ((sense->error_code & SSD_ERRCODE_VALID) != 0) {
switch (key) {
switch (key) {
case SKEY_NOT_READY:
case SKEY_ILLEGAL_REQUEST:
case SKEY_UNIT_ATTENTION:
@ -2492,7 +2509,7 @@ st_interpret_sense(xs)
break;
case SKEY_BLANK_CHECK:
printf(", requested size: %d (decimal)", info);
break;
break;
case SKEY_ABORTED_COMMAND:
if (xs->retries)
printf(", retrying");
@ -2502,13 +2519,13 @@ st_interpret_sense(xs)
default:
printf(", info = %d (decimal)", info);
}
}
}
if (sense->extra_len != 0) {
int n;
printf(", data =");
int n;
printf(", data =");
for (n = 0; n < sense->extra_len; n++)
printf(" %02x", sense->cmd_spec_info[n]);
}
}
printf("\n");
#endif
}
@ -2545,7 +2562,16 @@ st_touch_tape(st)
if ((error = st_mode_sense(st, 0)) != 0)
goto bad;
st->blksize = 1024;
/*
* If the block size is already known from the
* sense data, use it. Else start probing at 1024.
*/
if (st->media_blksize > 0)
st->blksize = st->media_blksize;
else
st->blksize = 1024;
do {
switch (st->blksize) {
case 512: