From af19388a973877b2349df46c4487a789cd3148ed Mon Sep 17 00:00:00 2001 From: Jens Axboe Date: Thu, 5 Jun 2025 11:33:52 -0600 Subject: io_uring: add struct io_cold_def->sqe_copy() method Will be called by the core of io_uring, if inline issue is not going to be tried for a request. Opcodes can define this handler to defer copying of SQE data that should remain stable. Only called if IO_URING_F_INLINE is set. If it isn't set, then there's a bug in the core handling of this, and -EFAULT will be returned instead to terminate the request. This will trigger a WARN_ON_ONCE(). Don't expect this to ever trigger, and down the line this can be removed. Reviewed-by: Caleb Sander Mateos Signed-off-by: Jens Axboe --- include/linux/io_uring_types.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'include') diff --git a/include/linux/io_uring_types.h b/include/linux/io_uring_types.h index 054c43c02c96..4ab3bdc103f2 100644 --- a/include/linux/io_uring_types.h +++ b/include/linux/io_uring_types.h @@ -504,6 +504,7 @@ enum { REQ_F_BUF_NODE_BIT, REQ_F_HAS_METADATA_BIT, REQ_F_IMPORT_BUFFER_BIT, + REQ_F_SQE_COPIED_BIT, /* not a real bit, just to check we're not overflowing the space */ __REQ_F_LAST_BIT, @@ -593,6 +594,8 @@ enum { * For SEND_ZC, whether to import buffers (i.e. the first issue). */ REQ_F_IMPORT_BUFFER = IO_REQ_FLAG(REQ_F_IMPORT_BUFFER_BIT), + /* ->sqe_copy() has been called, if necessary */ + REQ_F_SQE_COPIED = IO_REQ_FLAG(REQ_F_SQE_COPIED_BIT), }; typedef void (*io_req_tw_func_t)(struct io_kiocb *req, io_tw_token_t tw); -- cgit v1.2.3