Goldwyn Rodrigues c039b99792 iomap: use a srcmap for a read-modify-write I/O ... The srcmap is used to identify where the read is to be performed from. It is passed to ->iomap_begin, which can fill it in if we need to read data for partially written blocks from a different location than the write target. The srcmap is only supported for buffered writes so far. Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com> [hch: merged two patches, removed the IOMAP_F_COW flag, use iomap as srcmap if not set, adjust length down to srcmap end as well] Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Acked-by: Goldwyn Rodrigues <rgoldwyn@suse.com>		2019-10-21 08:51:59 -07:00
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apply.c	iomap: use a srcmap for a read-modify-write I/O	2019-10-21 08:51:59 -07:00
buffered-io.c	iomap: use a srcmap for a read-modify-write I/O	2019-10-21 08:51:59 -07:00
direct-io.c	iomap: use a srcmap for a read-modify-write I/O	2019-10-21 08:51:59 -07:00
fiemap.c	iomap: use a srcmap for a read-modify-write I/O	2019-10-21 08:51:59 -07:00
Makefile	iomap: lift common tracing code from xfs to iomap	2019-10-21 08:51:59 -07:00
seek.c	iomap: use a srcmap for a read-modify-write I/O	2019-10-21 08:51:59 -07:00
swapfile.c	iomap: use a srcmap for a read-modify-write I/O	2019-10-21 08:51:59 -07:00
trace.c	iomap: lift common tracing code from xfs to iomap	2019-10-21 08:51:59 -07:00
trace.h	iomap: lift the xfs writeback code to iomap	2019-10-21 08:51:59 -07:00