OpenAFS Master Repository branch, master, updated. openafs-devel-1_5_76-3660-ge8faeae

[Gerrit Code Review]

The following commit has been merged in the master branch:
commit e8faeae6dcae0e566de2b21d53d3f78f3cc44e3f
Author: Mark Vitale <mvitale@sinenomine.net>
Date:   Fri Jan 25 18:47:49 2013 -0500

    salvager: prevent assertion during -orphans attach
    
    Improve JudgeEntry() detection of orphaned directories to
    prevent unintentional deletion of their '.' and '..' entries.
    This in turn prevents a later assert (opr_Verify) when we try to
    delete and re-add '..' in order to attach the orphan.
    
    In JudgeEntry(), 2 sources of information about a
    directory entry are compared for consistency:
     - vnodeEssence (unique) from its vnode index entry
     - name, vnodeNumber and unique from its dir blob entry
    
    A directory entry may be ignored, deleted, or repaired/replaced,
    based upon the results of these and other tests (e.g. dirOprhaned).
    
    The '.' and '..' entries are treated as special cases because
    we do not want to delete them at this point if this directory
    is orphaned.  However, the current test for orphanhood
    (vnodeEssence->unique == 0) is not sufficient; it could be
    zero for other reasons.  This commit now uses the dirOrphaned
    flag to test for this.
    
    However, we are still interested in doing the right thing
    for '.' and '..' entries with vnodeEssence->unique == 0.
    This may indicate that the dir blob entry is pointing at the
    wrong vnode, and that vnode has unique==0.  The current code
    incorrectly ignores (returns 0) this case.  This commit now
    now falls through to the repair/replace code so that we can
    find the correct vnode for this entry.
    
    The current code assumes that the 'vnodeEssence == 0 &&
    !dirOrphaned' case doesn't exist.
    
    Thanks to Andrew Deason for his assistance.
    
    Change-Id: Id7c466fcc0f031b8fccb52dc51493eeed040cf95
    Reviewed-on: http://gerrit.openafs.org/9104
    Tested-by: BuildBot <buildbot@rampaginggeek.com>
    Reviewed-by: Derrick Brashear <shadow@your-file-system.com>

 src/vol/vol-salvage.c |   55 +++++++++++++++++++++++++++++-------------------
 1 files changed, 33 insertions(+), 22 deletions(-)

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