OpenAFS Master Repository branch, master, updated. openafs-devel-1_5_76-3944-gd83c123

[Gerrit Code Review]

The following commit has been merged in the master branch:
commit d83c1231cf371ac998304cbb2007ca848a514e0c
Author: Andrew Deason <adeason@sinenomine.net>
Date:   Wed Sep 18 16:56:23 2013 -0500

    vol: Nuke parent vol special inodes
    
    When we "nuke" a volume, we delete all inodes we can find that are for
    the given volume id. This currently means that if we nuke an RW volume
    id, we delete all of the inodes for file data for the entire volume
    group (since they're all stored in the VG id), but we do not delete
    the special inodes for any non-RW volumes in that volume group. Those
    special inodes left behind are not very useful, since we just deleted
    all of the actual file data.
    
    Currently this means that on namei, it's impossible to nuke the
    special inodes for non-RW volumes, since the namei nuke will only look
    in the subdir for the given volume id. If you give it the RW volume
    id, it won't delete the special inodes as menioned above; if you give
    it the RO volume id, it will only look in the RO subdir, and won't
    find the RO special inodes in the RW subdir.
    
    If a volume group is damaged in such a way that the salvager cannot
    fix it (due to a bug), this means that it is impossible to get rid of
    that volume group completely from the partition on namei without
    manually running "rm -rf" on the relevant AFSIDat directory. Normally
    we have a failsafe of running 'vos zap -force', but that doesn't work
    for non-RW special inodes, as mentioned above.
    
    So, in order to allow this 'vos zap -force' failsafe to work in
    hopefully all situations, also delete the special inodes for the
    parent volume. Use similar logic as exists in the salvager's
    OnlyOneVolume function.
    
    Change-Id: Id29da48a548c70b2b9ada1dd09f41cb59452bd11
    Reviewed-on: http://gerrit.openafs.org/10256
    Tested-by: BuildBot <buildbot@rampaginggeek.com>
    Reviewed-by: Derrick Brashear <shadow@your-file-system.com>

 src/vol/nuke.c |   18 +++++++++++++++---
 1 files changed, 15 insertions(+), 3 deletions(-)

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