CVS commit: [netbsd-6] src/sys/dev/raidframe

["Soren Jacobsen" <snj%netbsd.org@localhost>]

Module Name:    src
Committed By:   snj
Date:           Tue Dec  2 22:05:14 UTC 2014

Modified Files:
        src/sys/dev/raidframe [netbsd-6]: raidframevar.h rf_netbsdkintf.c
            rf_reconstruct.c

Log Message:
Pull up following revision(s) (requested by oster in ticket #1194):
        sys/dev/raidframe/raidframevar.h: revision 1.17
        sys/dev/raidframe/rf_netbsdkintf.c: revision 1.316
        sys/dev/raidframe/rf_reconstruct.c: revision 1.121
Fix a long-standing bug related to rebooting while a
reconstruct-to-spare is underway but not yet complete.
The issue was that a component was being marked as a used_spare when
the rebuild started, not when the rebuild was actually finished.
Marking it as a used_spare meant that the component label on the spare
was being updated such that after a reboot the component would be
considered up-to-date, regardless of whether the rebuild actually
completed!
This fix includes:
 1) Add an additional state "rf_ds_rebuilding_spare" which is used
    to denote that a spare is currently being rebuilt from the live
    components.
 2) Update the comments on the disk states, which were out-of-sync
    with reality.
 3) When rebuilding to a spare component, that spare now enters the
    state rf_ds_rebuilding_spare instead of the state rf_ds_used_spare.
 4) When the rebuild is actually complete then the spare component
    enters the rf_ds_used_spare state.  rf_ds_used_spare is now used
    exclusively for the case where the rebuilding to the spare has
    completed successfully.
XXX: Someday we need to teach raidctl(8) about this new state, and
take out the backwards compatibility code in rf_netbsdkintf.c (see
RAIDFRAME_GET_INFO in raidioctl()).  For today, this fix needs to be
generic enough that it can get backported without major grief.
XXX: Needs pullup to netbsd-5*, netbsd-6*, and netbsd-7
Fixes PR#49244.


To generate a diff of this commit:
cvs rdiff -u -r1.15 -r1.15.10.1 src/sys/dev/raidframe/raidframevar.h
cvs rdiff -u -r1.295.6.2 -r1.295.6.3 src/sys/dev/raidframe/rf_netbsdkintf.c
cvs rdiff -u -r1.117.8.1 -r1.117.8.2 src/sys/dev/raidframe/rf_reconstruct.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.