On 2/1/19 11:20 AM, Florian Weimer wrote:
> * 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.
Sure, I can do that.
--
Jens Axboe
