Date: Wed, 9 Aug 2000 09:00:04 -0700 (PDT) From: Matthew Jacob <mjacob@feral.com> To: freebsd-bugs@FreeBSD.org Subject: Re: bin/20501: autoloader support in dump(8) Message-ID: <200008091600.JAA99854@freefall.freebsd.org>
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The following reply was made to PR bin/20501; it has been noted by GNATS.
From: Matthew Jacob <mjacob@feral.com>
To: ip@mcc.ac.uk
Cc: FreeBSD-gnats-submit@FreeBSD.ORG
Subject: Re: bin/20501: autoloader support in dump(8)
Date: Wed, 9 Aug 2000 08:56:35 -0700 (PDT)
Why don't you just use the 'eject on close' tape device?
On Wed, 9 Aug 2000 ip@mcc.ac.uk wrote:
>
> >Number: 20501
> >Category: bin
> >Synopsis: extra flag to dump to offline autoloaders at EOT
> >Confidential: no
> >Severity: non-critical
> >Priority: low
> >Responsible: freebsd-bugs
> >State: open
> >Quarter:
> >Keywords:
> >Date-Required:
> >Class: change-request
> >Submitter-Id: current-users
> >Arrival-Date: Wed Aug 09 04:10:01 PDT 2000
> >Closed-Date:
> >Last-Modified:
> >Originator: Ian Pallfreeman
> >Release: FreeBSD 3.5-STABLE i386
> >Organization:
> Manchester Computing
> The University
> Oxford Road
> Manchester M13 9PL
> UK
> >Environment:
>
> Half-a-dozen or so clunky old HP DAT autoloaders and no Solaris
>
> >Description:
>
> Solaris has an additional ("l") flag to dump (aka ufsdump) which offlines
> a tape drive after EOT is detected. This tells DAT autoloaders which are
> in manual mode (i.e. the changer LUN hasn't seen any commands since the
> pod was loaded) to unload the current tape and load the next, if possible.
> The dump then continues without manual intervention until all tapes are
> written.
>
> The code is pretty simple. When EOT is reached, and we've waited for the tape
> to rewind, we do an OFFLINE ioctl and then wait again for two minutes or so
> until the tape opens successfully. If it doesn't, we assume we've used all
> the tapes in the pod and ask for manual intervention as before.
>
> Similar patches applied to FreeBSD 4.1-STABLE and NetBSD/SPARC 1.4.1.
>
> >How-To-Repeat:
>
>
>
> >Fix:
>
> --- main.c.orig Mon May 8 10:52:15 2000
> +++ main.c Wed Aug 9 11:46:32 2000
> @@ -87,6 +87,7 @@
> long dev_bsize = 1; /* recalculated below */
> long blocksperfile; /* output blocks per file */
> char *host = NULL; /* remote host (if any) */
> +int loader = 0; /* offline tape autoloader */
>
> static long numarg __P((char *, long, long));
> static void obsolete __P((int *, char **[]));
> @@ -123,9 +124,9 @@
>
> obsolete(&argc, &argv);
> #ifdef KERBEROS
> -#define optstring "0123456789aB:b:cd:f:h:kns:T:uWw"
> +#define optstring "0123456789aB:b:cd:f:h:klns:T:uWw"
> #else
> -#define optstring "0123456789aB:b:cd:f:h:ns:T:uWw"
> +#define optstring "0123456789aB:b:cd:f:h:lns:T:uWw"
> #endif
> while ((ch = getopt(argc, argv, optstring)) != -1)
> #undef optstring
> @@ -173,6 +174,10 @@
> dokerberos = 1;
> break;
> #endif
> +
> + case 'l': /* tape loader */
> + loader = 1;
> + break;
>
> case 'n': /* notify operators */
> notify = 1;
> --- tape.c.orig Sat Aug 28 01:12:39 1999
> +++ tape.c Wed Aug 9 11:46:03 2000
> @@ -43,6 +43,8 @@
> #include <sys/socket.h>
> #include <sys/time.h>
> #include <sys/wait.h>
> +#include <sys/ioctl.h>
> +#include <sys/mtio.h>
> #ifdef sunos
> #include <sys/vnode.h>
>
> @@ -78,6 +80,7 @@
> extern int ntrec; /* blocking factor on tape */
> extern int cartridge;
> extern char *host;
> +extern int loader;
> char *nexttape;
>
> static int atomic __P((ssize_t (*)(), int, char *, int));
> @@ -374,20 +377,46 @@
> close_rewind()
> {
> time_t tstart_changevol, tend_changevol;
> + int gottape=0;
>
> trewind();
> if (nexttape)
> return;
> (void)time((time_t *)&(tstart_changevol));
> - if (!nogripe) {
> - msg("Change Volumes: Mount volume #%d\n", tapeno+1);
> - broadcast("CHANGE DUMP VOLUMES!\7\7\n");
> + if (loader) {
> + struct mtop MtOp;
> + int f,tx=0;
> +
> + msg("Mounting next tape on %s\n",tape);
> +
> + if ((f = open(tape,0)) < 0)
> + quit("can't re-open tape loader after rewind");
> +
> + MtOp.mt_op = MTOFFL;
> + MtOp.mt_count = 1;
> + if (ioctl(f,MTIOCTOP,&MtOp) < 0)
> + quit("can't offline tape loader");
> + (void) close(f);
> + sleep(10);
> + while ((f = open(tape,0)) < 0 && tx++ < 12)
> + sleep (10);
> + if (f >= 0) {
> + (void) close(f);
> + gottape = 1;
> + }
> }
> - while (!query("Is the new volume mounted and ready to go?"))
> - if (query("Do you want to abort?")) {
> - dumpabort(0);
> - /*NOTREACHED*/
> + if (!gottape) {
> + if (!nogripe) {
> + msg("Change Volumes: Mount volume #%d\n", tapeno+1);
> + broadcast("CHANGE DUMP VOLUMES!\7\7\n");
> }
> + while (!query("Is the new volume mounted and ready to go?"))
> + if (query("Do you want to abort?")) {
> + dumpabort(0);
> + /*NOTREACHED*/
> + }
> + }
> +
> (void)time((time_t *)&(tend_changevol));
> if ((tstart_changevol != (time_t)-1) && (tend_changevol != (time_t)-1))
> tstart_writing += (tend_changevol - tstart_changevol);
>
>
> >Release-Note:
> >Audit-Trail:
> >Unformatted:
>
>
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