Date: Wed, 02 Feb 2000 17:37:26 +0900 From: Seigo Tanimura <tanimura@r.dl.itc.u-tokyo.ac.jp> To: mjacob@feral.com, osela@tactline.co.il Cc: tanimura@r.dl.itc.u-tokyo.ac.jp, hackers@FreeBSD.ORG Subject: Re: FreeBSD-specific extension of struct mtget breaks dump(8) from Solaris Message-ID: <14487.60613.970438.81928B@rina.r.dl.itc.u-tokyo.ac.jp> In-Reply-To: In your message of "Tue, 1 Feb 2000 23:28:17 -0800 (PST)" <Pine.BSF.4.10.10002012326510.72881-100000@beppo.feral.com> References: <14487.55497.261038.68187Y@rina.r.dl.itc.u-tokyo.ac.jp> <Pine.BSF.4.10.10002012326510.72881-100000@beppo.feral.com>
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--Multipart_Wed_Feb__2_17:37:25_2000-1
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[Added Oren Sela, the originator of the PR]
On Tue, 1 Feb 2000 23:28:17 -0800 (PST),
Matthew Jacob <mjacob@feral.com> said:
>> rmt(8) returns the result of MTIOCGET filled into struct mtget in
>> response to the 'S' command, issued by dump(8) of some certain OSs
>> including Solaris. (FreeBSD's one seems to not issue the 'S' command)
>> Due to the extention made to struct mtget in FreeBSD, remote dump
>> from, eg Solaris to FreeBSD fails to establish rmt connection.
>>
>> Maybe we would have to provide something like struct mtget_org for
>> compatibility with other OSs. Also, if we were to issue 'S' in our
>> dump(8), some command extention may be required. (any plans?)
>>
>> Any comments?
Matthew> Yes. This is definitely an issue. Didn't this come up before and was a PR
Matthew> filed that I somehow forgot to own? After all, I probably broke things.
You mean this one? I saw exactly the same message.
On Wed, 17 Nov 1999 05:50:13 -0800 (PST),
osela@tactline.co.il said:
>> Number: 14946
>> Category: i386
>> Synopsis: rmt - remote magtape protocol
(snip)
>> Description:
osela> I want to use the rmt on bsd vs. solaris 2.7.
osela> When I use ufsdump from the solaris machine to the BSD I get following output:
osela> DUMP: Writing 32 Kilobyte records
osela> DUMP: Date of this level 0 dump: Wed Nov 17 15:23:38 1999
osela> DUMP: Date of last level 0 dump: the epoch
osela> DUMP: Dumping /dev/rdsk/c0t0d0s7 (hope:/export/home) to
osela> alice:/dev/nrsa0.
osela> DUMP: Mapping (Pass I) [regular files]
osela> DUMP: Mapping (Pass II) [directories]
osela> DUMP: Estimated 436 blocks (218KB).
osela> DUMP: rmtstatus: expected response size 24, got 76
osela> DUMP: This means the remote rmt daemon is not compatible.
osela> DUMP: Lost connection to remote host.
osela> DUMP: Bad return code from dump: 1
osela> The rmt on Solaris is not compatible with the one on BSD.
osela> I need a solution - can any one help :->
The following patch change mtget to mtget_org, and performs necessary
conversion.
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diff -urN --exclude=CVS src.org/sbin/dump/dumprmt.c src/sbin/dump/dumprmt.c
--- src.org/sbin/dump/dumprmt.c Sat Aug 28 09:12:37 1999
+++ src/sbin/dump/dumprmt.c Wed Feb 2 17:08:54 2000
@@ -320,12 +320,28 @@
{
register int i;
register char *cp;
+#if defined(__FreeBSD__)
+ struct mtget_org mtsorg;
+#endif /* __FreeBSD__ */
if (rmtstate != TS_OPEN)
return (NULL);
rmtcall("status", "S\n");
+#if defined(__FreeBSD__)
+ for (i = 0, cp = (char *)&mtsorg; i < sizeof(mtsorg); i++)
+ *cp++ = rmtgetb();
+ /* Convert the compatible struct into FreeBSD's one. */
+ bzero(&mts, sizeof(mts));
+ mts->mt_type = mtsorg->mt_type;
+ mts->mt_dsreg = mtsorg->mt_dsreg;
+ mts->mt_erreg = mtsorg->mt_erreg;
+ mts->mt_resid = mtsorg->mt_resid;
+ mts->mt_fileno = mtsorg->mt_fileno;
+ mts->mt_blkno = mtsorg->mt_blkno;
+#else
for (i = 0, cp = (char *)&mts; i < sizeof(mts); i++)
*cp++ = rmtgetb();
+#endif /* __FreeBSD__ */
return (&mts);
}
diff -urN --exclude=CVS src.org/sys/sys/mtio.h src/sys/sys/mtio.h
--- src.org/sys/sys/mtio.h Mon Jan 24 11:34:17 2000
+++ src/sys/sys/mtio.h Wed Feb 2 17:08:11 2000
@@ -136,6 +136,38 @@
u_int32_t mt_comp2; /* compression type for mode 2 */
u_int32_t mt_comp3; /* compression type for mode 3 */
/* end not yet implemented */
+#endif /* __FreeBSD__ */
+ daddr_t mt_fileno; /* relative file number of current position */
+ daddr_t mt_blkno; /* relative block number of current position */
+};
+
+/* The original struct mtget for compatibility of rmt(8) with other OSs */
+
+struct mtget_org {
+ short mt_type; /* type of magtape device */
+/* the following two registers are grossly device dependent */
+ short mt_dsreg; /* ``drive status'' register */
+ short mt_erreg; /* ``error'' register */
+/* end device-dependent registers */
+ short mt_resid; /* residual count */
+#if notdef /* FreeBSD extention */
+ daddr_t mt_blksiz; /* presently operating blocksize */
+ daddr_t mt_density; /* presently operating density */
+ u_int32_t mt_comp; /* presently operating compression */
+ daddr_t mt_blksiz0; /* blocksize for mode 0 */
+ daddr_t mt_blksiz1; /* blocksize for mode 1 */
+ daddr_t mt_blksiz2; /* blocksize for mode 2 */
+ daddr_t mt_blksiz3; /* blocksize for mode 3 */
+ daddr_t mt_density0; /* density for mode 0 */
+ daddr_t mt_density1; /* density for mode 1 */
+ daddr_t mt_density2; /* density for mode 2 */
+ daddr_t mt_density3; /* density for mode 3 */
+/* the following are not yet implemented */
+ u_int32_t mt_comp0; /* compression type for mode 0 */
+ u_int32_t mt_comp1; /* compression type for mode 1 */
+ u_int32_t mt_comp2; /* compression type for mode 2 */
+ u_int32_t mt_comp3; /* compression type for mode 3 */
+/* end not yet implemented */
#endif
daddr_t mt_fileno; /* relative file number of current position */
daddr_t mt_blkno; /* relative block number of current position */
diff -urN --exclude=CVS src.org/usr.sbin/rmt/rmt.c src/usr.sbin/rmt/rmt.c
--- src.org/usr.sbin/rmt/rmt.c Sat Aug 28 10:19:32 1999
+++ src/usr.sbin/rmt/rmt.c Wed Feb 2 17:01:51 2000
@@ -181,12 +181,30 @@
case 'S': /* status */
DEBUG("rmtd: S\n");
{ struct mtget mtget;
+#if defined(__FreeBSD__)
+ struct mtget_org mtgetorg;
+#endif /* __FreeBSD__ */
if (ioctl(tape, MTIOCGET, (char *)&mtget) < 0)
goto ioerror;
+#if defined(__FreeBSD__)
+ /* Convert FreeBSD's mtget to the compatible one. */
+ mtgetorg.mt_type = mtget.mt_type;
+ mtgetorg.mt_dsreg = mtget.mt_dsreg;
+ mtgetorg.mt_erreg = mtget.mt_erreg;
+ mtgetorg.mt_resid = mtget.mt_resid;
+ mtgetorg.mt_fileno = mtget.mt_fileno;
+ mtgetorg.mt_blkno = mtget.mt_blkno;
+ rval = sizeof (mtgetorg);
+#else
rval = sizeof (mtget);
+#endif /* __FreeBSD__ */
(void)sprintf(resp, "A%d\n", rval);
(void)write(1, resp, strlen(resp));
+#if defined(__FreeBSD__)
+ (void)write(1, (char *)&mtgetorg, sizeof (mtgetorg));
+#else
(void)write(1, (char *)&mtget, sizeof (mtget));
+#endif /* __FreeBSD__ */
goto top;
}
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--
Seigo Tanimura <tanimura@r.dl.itc.u-tokyo.ac.jp> <tanimura@FreeBSD.org>
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