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authorLachlan McIlroy <lachlan@redback.melbourne.sgi.com>2008-12-22 17:56:49 +1100
committerLachlan McIlroy <lachlan@redback.melbourne.sgi.com>2008-12-22 17:56:49 +1100
commit9f6c92b9cc2fd41d6c7b493be5637cc5b5659880 (patch)
tree64ea95c3305d2bba4191f7dec831e623bff8a911 /fs/xfs/support
parent4fdc7781799926dca6c3a3bb6e9533a9718c4dea (diff)
[XFS] Fix speculative allocation beyond eof
Speculative allocation beyond eof doesn't work properly. It was broken some time ago after a code cleanup that moved what is now xfs_iomap_eof_align_last_fsb() and xfs_iomap_eof_want_preallocate() out of xfs_iomap_write_delay() into separate functions. The code used to use the current file size in various checks but got changed to be max(file_size, i_new_size). Since i_new_size is the result of 'offset + count' then in xfs_iomap_eof_want_preallocate() the check for '(offset + count) <= isize' will always be true. ie if 'offset + count' is > ip->i_size then isize will be i_new_size and equal to 'offset + count'. This change fixes all the places that used to use the current file size. Reviewed-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
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