Date: Mon, 23 Jan 2012 15:36:24 +1030 From: "Daniel O'Connor" <doconnor@gsoft.com.au> To: Andrew Davis <glneolistmail@gmail.com> Cc: freebsd-hackers@freebsd.org Subject: Re: Rebooting/Halting system from kernel module Message-ID: <BE6C80B9-11B2-425A-9A70-0960F8B3F007@gsoft.com.au> In-Reply-To: <CAHdBCVdAA%2Bi4je4o55TxCKW26cp8dO4W-fh2PYq5j0qco_Y-kA@mail.gmail.com> References: <E1RouW1-0003BY-9s.geoffrey-levand-mail-ru@f69.mail.ru> <4F1CC6A8.3010007@freebsd.org> <CAHdBCVdAA%2Bi4je4o55TxCKW26cp8dO4W-fh2PYq5j0qco_Y-kA@mail.gmail.com>
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On 23/01/2012, at 13:33, Andrew Davis wrote: >> do you want to sync the disks first? of just hard reset? >=20 > Why would anyone ever want to do that, you're a kernel mod, if you = want to > do that just triple-fault. You can call cpu_reset(). I wrote a KLD which did this because we had a driver issue where the = system wouldn't reboot if you did shutdown -r (it would hang). =3D=3D=3D=3D reset.c =3D=3D=3D=3D #include <sys/param.h> #include <sys/kernel.h> #include <sys/module.h> #include <sys/types.h> #include <sys/systm.h> #include <machine/cpu.h> static int reset_handler(module_t mod, int /*modeventtype_t*/ what, void *arg); static moduledata_t mod_data=3D { "reset", reset_handler, 0 }; MODULE_VERSION(reset, 1); DECLARE_MODULE(reset, mod_data, SI_SUB_EXEC, SI_ORDER_ANY); static int=20 reset_handler(module_t mod, int /*modeventtype_t*/ what, void *arg) { switch (what) { case MOD_LOAD: printf("Forced reboot\n"); DELAY(1000000); /* wait 1 sec for printf's to complete and = be read */ /* cpu_boot(howto); */ /* doesn't do anything at the moment = */ cpu_reset(); printf("Reset failed!\n"); /* NOTREACHED */ /* assuming reset worked */ break; =20 default: return(EOPNOTSUPP); break; } return(ENXIO); } =3D=3D=3D=3D =3D=3D=3D=3D Makefile =3D=3D=3D=3D KMOD =3D reset SRCS =3D reset.c .include <bsd.kmod.mk> =3D=3D=3D=3D > On Sun, Jan 22, 2012 at 9:32 PM, Julian Elischer <julian@freebsd.org> = wrote: >=20 >> On 1/22/12 2:19 AM, geoffrey levand wrote: >>=20 >>> Hi, >>>=20 >>> how would i reboot/halt the system from a kernel module ? >>>=20 >>=20 >> the answer is "that depends".. >>=20 >> do you want to sync the disks first? of just hard reset? >>=20 >>=20 >>=20 >> ______________________________**_________________ >> freebsd-hackers@freebsd.org mailing list >> = http://lists.freebsd.org/**mailman/listinfo/freebsd-**hackers<http://lists= .freebsd.org/mailman/listinfo/freebsd-hackers> >> To unsubscribe, send any mail to "freebsd-hackers-unsubscribe@** >> freebsd.org <freebsd-hackers-unsubscribe@freebsd.org>" >>=20 > _______________________________________________ > freebsd-hackers@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-hackers > To unsubscribe, send any mail to = "freebsd-hackers-unsubscribe@freebsd.org" >=20 -- Daniel O'Connor software and network engineer for Genesis Software - http://www.gsoft.com.au "The nice thing about standards is that there are so many of them to choose from." -- Andrew Tanenbaum GPG Fingerprint - 5596 B766 97C0 0E94 4347 295E E593 DC20 7B3F CE8C
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