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| author | Stefan Metzmacher <metze@samba.org> | 2022-08-11 09:11:15 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2022-08-12 17:01:00 -0600 |
| commit | f2ccb5aed7bce1d8b3ed5b3385759a5509663028 (patch) | |
| tree | 32c78d3576a1e594aab4dca3c36efb6ee5dcd93e /io_uring/splice.c | |
| parent | addebd9ac9ca0ef8b3764907bf8018e48caffc64 (diff) | |
| download | lwn-f2ccb5aed7bce1d8b3ed5b3385759a5509663028.tar.gz lwn-f2ccb5aed7bce1d8b3ed5b3385759a5509663028.zip | |
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>
Diffstat (limited to 'io_uring/splice.c')
| -rw-r--r-- | io_uring/splice.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/io_uring/splice.c b/io_uring/splice.c index b013ba34bffa..53e4232d0866 100644 --- a/io_uring/splice.c +++ b/io_uring/splice.c @@ -26,7 +26,7 @@ struct io_splice { static int __io_splice_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) { - struct io_splice *sp = io_kiocb_to_cmd(req); + struct io_splice *sp = io_kiocb_to_cmd(req, struct io_splice); unsigned int valid_flags = SPLICE_F_FD_IN_FIXED | SPLICE_F_ALL; sp->len = READ_ONCE(sqe->len); @@ -46,7 +46,7 @@ int io_tee_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) int io_tee(struct io_kiocb *req, unsigned int issue_flags) { - struct io_splice *sp = io_kiocb_to_cmd(req); + struct io_splice *sp = io_kiocb_to_cmd(req, struct io_splice); struct file *out = sp->file_out; unsigned int flags = sp->flags & ~SPLICE_F_FD_IN_FIXED; struct file *in; @@ -78,7 +78,7 @@ done: int io_splice_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) { - struct io_splice *sp = io_kiocb_to_cmd(req); + struct io_splice *sp = io_kiocb_to_cmd(req, struct io_splice); sp->off_in = READ_ONCE(sqe->splice_off_in); sp->off_out = READ_ONCE(sqe->off); @@ -87,7 +87,7 @@ int io_splice_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) int io_splice(struct io_kiocb *req, unsigned int issue_flags) { - struct io_splice *sp = io_kiocb_to_cmd(req); + struct io_splice *sp = io_kiocb_to_cmd(req, struct io_splice); struct file *out = sp->file_out; unsigned int flags = sp->flags & ~SPLICE_F_FD_IN_FIXED; loff_t *poff_in, *poff_out; |