From: Pavel Begunkov <asml.silence@gmail.com> mainline inclusion from mainline-v6.10-rc2 commit a6ccb48e13662bcb98282e051512b9686b02d353 category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/ICJPON CVE: NA Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i... -------------------------------- Some io_uring commands can use some inline space in io_kiocb. We have 32 bytes in struct io_uring_cmd, expose it. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/7ca779a61ee5e166e535d70df9c7f07b15d8a0ce.172607208... Signed-off-by: Jens Axboe <axboe@kernel.dk> Signed-off-by: Yifan Qiao <qiaoyifan4@huawei.com> Signed-off-by: Long Li <leo.lilong@huawei.com> --- include/linux/io_uring/cmd.h | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/include/linux/io_uring/cmd.h b/include/linux/io_uring/cmd.h index 2597523dc6ad..7e0f1084815a 100644 --- a/include/linux/io_uring/cmd.h +++ b/include/linux/io_uring/cmd.h @@ -28,6 +28,15 @@ static inline const void *io_uring_sqe_cmd(const struct io_uring_sqe *sqe) return sqe->cmd; } +static inline void io_uring_cmd_private_sz_check(size_t cmd_sz) +{ + BUILD_BUG_ON(cmd_sz > sizeof_field(struct io_uring_cmd, pdu)); +} +#define io_uring_cmd_to_pdu(cmd, pdu_type) ( \ + io_uring_cmd_private_sz_check(sizeof(pdu_type)), \ + ((pdu_type *)&(cmd)->pdu) \ +) + #if defined(CONFIG_IO_URING) int io_uring_cmd_import_fixed(u64 ubuf, unsigned long len, int rw, struct iov_iter *iter, void *ioucmd); -- 2.39.2