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xfs: don't bother looking at the refcount tree for reads
There is no need to trim an extent into a shared or non-shared one, or report any flags for plain old reads. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Brian Foster <bfoster@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
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1 changed files with 8 additions and 5 deletions
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@ -996,12 +996,15 @@ xfs_file_iomap_begin(
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return error;
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}
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if (flags & (IOMAP_WRITE | IOMAP_ZERO | IOMAP_REPORT)) {
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/* Trim the mapping to the nearest shared extent boundary. */
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error = xfs_reflink_trim_around_shared(ip, &imap, &shared, &trimmed);
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error = xfs_reflink_trim_around_shared(ip, &imap, &shared,
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&trimmed);
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if (error) {
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xfs_iunlock(ip, lockmode);
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return error;
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}
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}
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if ((flags & IOMAP_WRITE) && imap_needs_alloc(inode, &imap, nimaps)) {
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/*
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