From d589bcddaa3f8b1668499c3f0466863df3abe37a Mon Sep 17 00:00:00 2001 From: Ming Lei Date: Thu, 21 Aug 2025 12:02:06 +0800 Subject: io-uring: move `struct io_br_sel` into io_uring_types.h Move `struct io_br_sel` into io_uring_types.h and prepare for supporting provided buffer on uring_cmd. Signed-off-by: Ming Lei Link: https://lore.kernel.org/r/20250821040210.1152145-2-ming.lei@redhat.com Signed-off-by: Jens Axboe --- include/linux/io_uring_types.h | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) (limited to 'include') diff --git a/include/linux/io_uring_types.h b/include/linux/io_uring_types.h index 1d33984611bc..9c6c548f43f5 100644 --- a/include/linux/io_uring_types.h +++ b/include/linux/io_uring_types.h @@ -85,6 +85,25 @@ struct io_mapped_region { unsigned flags; }; +/* + * Return value from io_buffer_list selection, to avoid stashing it in + * struct io_kiocb. For legacy/classic provided buffers, keeping a reference + * across execution contexts are fine. But for ring provided buffers, the + * list may go away as soon as ->uring_lock is dropped. As the io_kiocb + * persists, it's better to just keep the buffer local for those cases. + */ +struct io_br_sel { + struct io_buffer_list *buf_list; + /* + * Some selection parts return the user address, others return an error. + */ + union { + void __user *addr; + ssize_t val; + }; +}; + + /* * Arbitrary limit, can be raised if need be */ -- cgit v1.2.3