io_uring: make io_kiocb_to_cmd() typesafe

We need to make sure (at build time) that struct io_cmd_data is not
casted to a structure that's larger.

Signed-off-by: Stefan Metzmacher <metze@samba.org>
Link: https://lore.kernel.org/r/c024cdf25ae19fc0319d4180e2298bade8ed17b8.1660201408.git.metze@samba.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Stefan Metzmacher
2022-08-11 09:11:15 +02:00
committed by Jens Axboe
parent addebd9ac9
commit f2ccb5aed7
20 changed files with 134 additions and 129 deletions

View File

@@ -22,7 +22,7 @@ struct io_statx {
int io_statx_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
{
struct io_statx *sx = io_kiocb_to_cmd(req);
struct io_statx *sx = io_kiocb_to_cmd(req, struct io_statx);
const char __user *path;
if (sqe->buf_index || sqe->splice_fd_in)
@@ -53,7 +53,7 @@ int io_statx_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
int io_statx(struct io_kiocb *req, unsigned int issue_flags)
{
struct io_statx *sx = io_kiocb_to_cmd(req);
struct io_statx *sx = io_kiocb_to_cmd(req, struct io_statx);
int ret;
if (issue_flags & IO_URING_F_NONBLOCK)
@@ -66,7 +66,7 @@ int io_statx(struct io_kiocb *req, unsigned int issue_flags)
void io_statx_cleanup(struct io_kiocb *req)
{
struct io_statx *sx = io_kiocb_to_cmd(req);
struct io_statx *sx = io_kiocb_to_cmd(req, struct io_statx);
if (sx->filename)
putname(sx->filename);