xfs: add DAX file operations support

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Add the initial support for DAX file operations to XFS. This
includes the necessary block allocation and mmap page fault hooks
for DAX to function.

Note that there are changes to the splice interfaces to ensure that
for DAX splice avoids direct page cache manipulations and instead
takes the DAX IO paths for read/write operations.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>

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Dave Chinner 2015-06-04 09:18:53 +10:00 • committed by Dave Chinner

parent ce5c5d554d

commit 6b698edeee

3 changed files with 158 additions and 83 deletions

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116

fs/xfs/xfs_aops.c

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7

fs/xfs/xfs_aops.h

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120

fs/xfs/xfs_file.c

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