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Commit a38d1243 authored by Goldwyn Rodrigues's avatar Goldwyn Rodrigues Committed by Jens Axboe
Browse files

fs: Introduce IOMAP_NOWAIT 



IOCB_NOWAIT translates to IOMAP_NOWAIT for iomaps.
This is used by XFS in the XFS patch.

Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
Reviewed-by: default avatarJan Kara <jack@suse.cz>
Signed-off-by: default avatarGoldwyn Rodrigues <rgoldwyn@suse.com>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 6be96d3a

fs/iomap.c

+8 −0
Original line number Diff line number Diff line
@@ -881,6 +881,14 @@ iomap_dio_rw(struct kiocb *iocb, struct iov_iter *iter, 
		flags |= IOMAP_WRITE;

	}



	if (iocb->ki_flags & IOCB_NOWAIT) {

		if (filemap_range_has_page(mapping, start, end)) {

			ret = -EAGAIN;

			goto out_free_dio;

		}

		flags |= IOMAP_NOWAIT;

	}



	ret = filemap_write_and_wait_range(mapping, start, end);

	if (ret)

		goto out_free_dio;

include/linux/iomap.h

+1 −0
Original line number Diff line number Diff line
@@ -52,6 +52,7 @@ struct iomap { 
#define IOMAP_REPORT		(1 << 2) /* report extent status, e.g. FIEMAP */

#define IOMAP_FAULT		(1 << 3) /* mapping for page fault */

#define IOMAP_DIRECT		(1 << 4) /* direct I/O */

#define IOMAP_NOWAIT		(1 << 5) /* Don't wait for writeback */



struct iomap_ops {

	/*