From mboxrd@z Thu Jan 1 00:00:00 1970 From: Florian Weimer Subject: Re: [PATCH 05/18] Add io_uring IO interface Date: Fri, 01 Feb 2019 19:20:57 +0100 Message-ID: <871s4r8j5i.fsf@oldenburg2.str.redhat.com> References: <20190201152414.23296-1-axboe@kernel.dk> <20190201152414.23296-6-axboe@kernel.dk> Mime-Version: 1.0 Content-Type: text/plain Return-path: In-Reply-To: <20190201152414.23296-6-axboe@kernel.dk> (Jens Axboe's message of "Fri, 1 Feb 2019 08:24:01 -0700") Sender: owner-linux-aio@kvack.org To: Jens Axboe Cc: linux-aio@kvack.org, linux-block@vger.kernel.org, linux-api@vger.kernel.org, hch@lst.de, jmoyer@redhat.com, avi@scylladb.com, jannh@google.com List-Id: linux-api@vger.kernel.org * Jens Axboe: > +/* > + * Filled with the offset for mmap(2) > + */ > +struct io_sqring_offsets { > + __u32 head; > + __u32 tail; > + __u32 ring_mask; > + __u32 ring_entries; > + __u32 flags; > + __u32 dropped; > + __u32 array; > + __u32 resv[3]; > +}; > + > +struct io_cqring_offsets { > + __u32 head; > + __u32 tail; > + __u32 ring_mask; > + __u32 ring_entries; > + __u32 overflow; > + __u32 cqes; > + __u32 resv[4]; > +}; > + > +/* > + * io_uring_enter(2) flags > + */ > +#define IORING_ENTER_GETEVENTS (1U << 0) > + > +/* > + * Passed in for io_uring_setup(2). Copied back with updated info on success > + */ > +struct io_uring_params { > + __u32 sq_entries; > + __u32 cq_entries; > + __u32 flags; > + __u32 resv[7]; > + struct io_sqring_offsets sq_off; > + struct io_cqring_offsets cq_off; > +}; I still think it might be a good idea to have one reserved __u64 field for alignment purposes. Thanks, Florian -- To unsubscribe, send a message with 'unsubscribe linux-aio' in the body to majordomo@kvack.org. For more info on Linux AIO, see: http://www.kvack.org/aio/ Don't email: aart@kvack.org