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authorMatthew Bobrowski <mbobrowski@mbobrowski.org>2019-09-19 15:32:44 -0700
committerDarrick J. Wong <darrick.wong@oracle.com>2019-09-19 15:32:44 -0700
commit6fe7b9901400152238e1b76198747f6716c78aad (patch)
tree08ae8dd10545ba16c4d38a19da5f9d45204fbde8 /include/linux/iomap.h
parent609488bc979f99f805f34e9a32c1e3b71179d10b (diff)
iomap: split size and error for iomap_dio_rw ->end_io
Modify the calling convention for the iomap_dio_rw ->end_io() callback. Rather than passing either dio->error or dio->size as the 'size' argument, instead pass both the dio->error and the dio->size value separately. In the instance that an error occurred during a write, we currently cannot determine whether any blocks have been allocated beyond the current EOF and data has subsequently been written to these blocks within the ->end_io() callback. As a result, we cannot judge whether we should take the truncate failed write path. Having both dio->error and dio->size will allow us to perform such checks within this callback. Signed-off-by: Matthew Bobrowski <mbobrowski@mbobrowski.org> [hch: minor cleanups] 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> Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Diffstat (limited to 'include/linux/iomap.h')
-rw-r--r--include/linux/iomap.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/include/linux/iomap.h b/include/linux/iomap.h
index bc499ceae392..50bb746d2216 100644
--- a/include/linux/iomap.h
+++ b/include/linux/iomap.h
@@ -188,8 +188,8 @@ sector_t iomap_bmap(struct address_space *mapping, sector_t bno,
*/
#define IOMAP_DIO_UNWRITTEN (1 << 0) /* covers unwritten extent(s) */
#define IOMAP_DIO_COW (1 << 1) /* covers COW extent(s) */
-typedef int (iomap_dio_end_io_t)(struct kiocb *iocb, ssize_t ret,
- unsigned flags);
+typedef int (iomap_dio_end_io_t)(struct kiocb *iocb, ssize_t size, int error,
+ unsigned int flags);
ssize_t iomap_dio_rw(struct kiocb *iocb, struct iov_iter *iter,
const struct iomap_ops *ops, iomap_dio_end_io_t end_io);
int iomap_dio_iopoll(struct kiocb *kiocb, bool spin);