diff options
| author | Christoph Hellwig <hch@lst.de> | 2019-09-19 15:32:45 -0700 |
|---|---|---|
| committer | Darrick J. Wong <darrick.wong@oracle.com> | 2019-09-19 15:32:45 -0700 |
| commit | 838c4f3d7515efe9d0e32c846fb5d102b6d8a29d (patch) | |
| tree | cd50fb73997130df5bd87700861aae7663702ed4 /include/linux/iomap.h | |
| parent | 6fe7b9901400152238e1b76198747f6716c78aad (diff) | |
iomap: move the iomap_dio_rw ->end_io callback into a structure
Add a new iomap_dio_ops structure that for now just contains the end_io
handler. This avoid storing the function pointer in a mutable structure,
which is a possible exploit vector for kernel code execution, and prepares
for adding a submit_io handler that btrfs needs.
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>
Diffstat (limited to 'include/linux/iomap.h')
| -rw-r--r-- | include/linux/iomap.h | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/include/linux/iomap.h b/include/linux/iomap.h index 50bb746d2216..7aa5d6117936 100644 --- a/include/linux/iomap.h +++ b/include/linux/iomap.h @@ -188,10 +188,14 @@ 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 size, int error, - unsigned int flags); + +struct iomap_dio_ops { + int (*end_io)(struct kiocb *iocb, ssize_t size, int error, + unsigned 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); + const struct iomap_ops *ops, const struct iomap_dio_ops *dops); int iomap_dio_iopoll(struct kiocb *kiocb, bool spin); #ifdef CONFIG_SWAP |