[XFS updates] XFS development tree branch, master, updated. v2.6.28-rc3-11564-g957274d

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The branch, master has been updated
  957274d Merge branch 'master' of git+ssh://oss.sgi.com/oss/git/xfs/xfs
  33ad965 Long btree pointers are still 64 bit on disk
      from  5253a11a8187b6329dda41219d9eece971c06e19 (commit)

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- Log -----------------------------------------------------------------
commit 957274d7ce39eb9dab3666fc5c9f634c4d9fbf9d
Merge: 33ad965dde197a016083438359c3163e1aca9ada 5253a11a8187b6329dda41219d9eece971c06e19
Author: Felix Blyakher <felixb at sgi.com>
Date:   Wed Jan 21 22:39:29 2009 -0600

    Merge branch 'master' of git+ssh://oss.sgi.com/oss/git/xfs/xfs

commit 33ad965dde197a016083438359c3163e1aca9ada
Author: Dave Chinner <david at fromorbit.com>
Date:   Wed Jan 21 15:22:17 2009 +1100

    Long btree pointers are still 64 bit on disk
    
    [XFS] Long btree pointers are still 64 bit on disk
    
    On 32 bit machines with CONFIG_LBD=n, XFS reduces the
    in memory size of xfs_fsblock_t to 32 bits so that it
    will fit within 32 bit addressing. However, the disk format
    for long btree pointers are still 64 bits in size.
    
    The recent btree rewrite failed to take this into account
    when initialising new btree blocks, setting sibling pointers
    to NULL and checking if they are NULL. Hence checking whether
    a 64 bit NULL was the same as a 32 bit NULL was failingi
    resulting in NULL sibling pointers failing to be detected
    correctly. This showed up as WANT_CORRUPTED_GOTO shutdowns
    in xfs_btree_delrec.
    
    Fix this by making all the comparisons and setting of long
    pointer btree NULL blocks to the disk format, not the
    in memory format. i.e. use NULLDFSBNO.
    
    Reported-by: Alexander Beregalov <a.beregalov at gmail.com>
    Reported-by: Jacek Luczak <difrost.kernel at gmail.com>
    Reported-by: Danny ter Haar <dth at dth.net>
    Tested-by: Jacek Luczak <difrost.kernel at gmail.com>
    Reviewed-by: Christoph Hellwig <hch at infradead.org>
    Signed-off-by: Dave Chinner <david at fromorbit.com>
    Signed-off-by: Felix Blyakher <felixb at sgi.com>

-----------------------------------------------------------------------

Summary of changes:
 fs/xfs/xfs_btree.c |   10 +++++-----
 1 files changed, 5 insertions(+), 5 deletions(-)


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