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    xfs: introduce xfs_bmapi_read() · 5c8ed202
    Dave Chinner 提交于
    xfs_bmapi() currently handles both extent map reading and
    allocation. As a result, the code is littered with "if (wr)"
    branches to conditionally do allocation operations if required.
    This makes the code much harder to follow and causes significant
    indent issues with the code.
    
    Given that read mapping is much simpler than allocation, we can
    split out read mapping from xfs_bmapi() and reuse the logic that
    we have already factored out do do all the hard work of handling the
    extent map manipulations. The results in a much simpler function for
    the common extent read operations, and will allow the allocation
    code to be simplified in another commit.
    
    Once xfs_bmapi_read() is implemented, convert all the callers of
    xfs_bmapi() that are only reading extents to use the new function.
    Signed-off-by: NDave Chinner <dchinner@redhat.com>
    Signed-off-by: NChristoph Hellwig <hch@lst.de>
    Signed-off-by: NAlex Elder <aelder@sgi.com>
    
    5c8ed202
xfs_attr_leaf.c 83.6 KB