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xfs: cleanup xfs_ilock_iocb_for_write
Move the relock path out of the straight line and add a comment explaining why it exists. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <djwong@kernel.org> Signed-off-by: Chandan Babu R <chandanbabu@kernel.org>
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@ -213,14 +213,18 @@ xfs_ilock_iocb_for_write(
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if (ret)
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return ret;
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if (*lock_mode == XFS_IOLOCK_EXCL)
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return 0;
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if (!xfs_iflags_test(ip, XFS_IREMAPPING))
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return 0;
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/*
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* If a reflink remap is in progress we always need to take the iolock
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* exclusively to wait for it to finish.
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*/
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if (*lock_mode == XFS_IOLOCK_SHARED &&
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xfs_iflags_test(ip, XFS_IREMAPPING)) {
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xfs_iunlock(ip, *lock_mode);
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*lock_mode = XFS_IOLOCK_EXCL;
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return xfs_ilock_iocb(iocb, *lock_mode);
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}
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xfs_iunlock(ip, *lock_mode);
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*lock_mode = XFS_IOLOCK_EXCL;
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return xfs_ilock_iocb(iocb, *lock_mode);
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return 0;
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}
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static unsigned int
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