Re: New boothowto flag to prevent raid auto-root-configuration

[buhrow%lothlorien.nfbcal.org@localhost (Brian Buhrow)]

        Hello Martin.  Doesn't boot -a  already do this by allowing you to
select the root filesystem and the init path?  I'm certain I've booted
systems running with raid roots off of cdroms for repair purposes.
-Brian

On Apr 18,  7:41am, Martin Husemann wrote:
} Subject: New boothowto flag to prevent raid auto-root-configuration
} 
} --6c2NcOVqGQ03X4Wi
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} 
} Hi folks,
} 
} as described in PR 44774 (see
} http://gnats.netbsd.org/cgi-bin/query-pr-single.pl?number=44774), it is
} currently not possible to use a standard NetBSD install CD on a system
} wich normally boots from raid (at least on i386, amd64 or sparc64, where
} a stock GENERIC kernel is used).
} 
} To fix this, I'd like to introduce a new boothowto flag, that turns off
} all magic to override the root device (for now: turns off the root part
} of raidframe autoconfiguration, but could do similar things in the future
} with LVM or whatever).
} 
} The patch attched does this. It will be accompanied by bootloader changes to
} set this flag if a new keyword is present in /boot.cfg.
} 
} What do you think? Better naming suggestion also welcome.
} 
} Martin
} 
} 
} --6c2NcOVqGQ03X4Wi
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} Content-Disposition: attachment; filename="rf.patch"
} 
} Index: sys/reboot.h
} ===================================================================
} RCS file: /cvsroot/src/sys/sys/reboot.h,v
} retrieving revision 1.25
} diff -c -u -r1.25 reboot.h
} --- sys/reboot.h      25 Dec 2007 18:33:48 -0000      1.25
} +++ sys/reboot.h      18 Apr 2011 05:34:01 -0000
} @@ -53,6 +53,9 @@
}  #define      RB_STRING       0x00000400      /* use provided bootstr */
}  #define      RB_POWERDOWN    (RB_HALT|0x800) /* turn power off (or at least 
halt) */
}  #define RB_USERCONF  0x00001000      /* change configured devices */
} +#define      RB_NO_ROOT_OVERRIDE 0x00002000  /* no automatic override of the 
booted
} +                                      * device, like raidframes auto
} +                                      * root configuration */
}  
}  /*
}   * Extra autoboot flags (passed by boot prog to kernel). See also
} Index: dev/raidframe/rf_netbsdkintf.c
} ===================================================================
} RCS file: /cvsroot/src/sys/dev/raidframe/rf_netbsdkintf.c,v
} retrieving revision 1.284
} diff -c -u -r1.284 rf_netbsdkintf.c
} --- dev/raidframe/rf_netbsdkintf.c    18 Mar 2011 23:53:26 -0000      1.284
} +++ dev/raidframe/rf_netbsdkintf.c    18 Apr 2011 05:34:01 -0000
} @@ -465,7 +465,7 @@
}       /* if the user has specified what the root device should be
}          then we don't touch booted_device or boothowto... */
}  
} -     if (rootspec != NULL)
} +     if ((rootspec != NULL) || (boothowto & RB_NO_ROOT_OVERRIDE))
}               return;
}  
}       /* we found something bootable... */
} 
} --6c2NcOVqGQ03X4Wi--
>-- End of excerpt from Martin Husemann