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xfs: fix bogus m_maxagi check in xfs_iget 

These days inode64 should only control which AGs we allocate new
inodes from, while we still try to support reading all existing
inodes.  To make this actually work the check ontop of xfs_iget
needs to be relaxed to allow inodes in all allocation groups instead
of just those that we allow allocating inodes from.  Note that we
can't simply remove the check - it prevents us from accessing
invalid data when fed invalid inode numbers from NFS or bulkstat.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Alex Elder <aelder@sgi.com>
hifive-unleashed-5.1
Christoph Hellwig 2010-10-06 18:31:23 +00:00 committed by Alex Elder
parent 1b0407125f
commit d276734d93
1 changed files with 2 additions and 2 deletions
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4
fs/xfs/xfs_iget.c
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@ -365,8 +365,8 @@ xfs_iget(
xfs_perag_t *pag;
xfs_agino_t agino;
/* the radix tree exists only in inode capable AGs */
if (XFS_INO_TO_AGNO(mp, ino) >= mp->m_maxagi)
/* reject inode numbers outside existing AGs */
if (XFS_INO_TO_AGNO(mp, ino) >= mp->m_sb.sb_agcount)
return EINVAL;
/* get the perag structure and ensure that it's inode capable */