diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/uapi/linux/io_uring.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/include/uapi/linux/io_uring.h b/include/uapi/linux/io_uring.h index 042eab793e26..a275f91d2ac0 100644 --- a/include/uapi/linux/io_uring.h +++ b/include/uapi/linux/io_uring.h @@ -440,11 +440,21 @@ struct io_uring_cqe { * IORING_CQE_F_SOCK_NONEMPTY If set, more data to read after socket recv * IORING_CQE_F_NOTIF Set for notification CQEs. Can be used to distinct * them from sends. + * IORING_CQE_F_BUF_MORE If set, the buffer ID set in the completion will get + * more completions. In other words, the buffer is being + * partially consumed, and will be used by the kernel for + * more completions. This is only set for buffers used via + * the incremental buffer consumption, as provided by + * a ring buffer setup with IOU_PBUF_RING_INC. For any + * other provided buffer type, all completions with a + * buffer passed back is automatically returned to the + * application. */ #define IORING_CQE_F_BUFFER (1U << 0) #define IORING_CQE_F_MORE (1U << 1) #define IORING_CQE_F_SOCK_NONEMPTY (1U << 2) #define IORING_CQE_F_NOTIF (1U << 3) +#define IORING_CQE_F_BUF_MORE (1U << 4) #define IORING_CQE_BUFFER_SHIFT 16 @@ -716,9 +726,17 @@ struct io_uring_buf_ring { * mmap(2) with the offset set as: * IORING_OFF_PBUF_RING | (bgid << IORING_OFF_PBUF_SHIFT) * to get a virtual mapping for the ring. + * IOU_PBUF_RING_INC: If set, buffers consumed from this buffer ring can be + * consumed incrementally. Normally one (or more) buffers + * are fully consumed. With incremental consumptions, it's + * feasible to register big ranges of buffers, and each + * use of it will consume only as much as it needs. This + * requires that both the kernel and application keep + * track of where the current read/recv index is at. */ enum io_uring_register_pbuf_ring_flags { IOU_PBUF_RING_MMAP = 1, + IOU_PBUF_RING_INC = 2, }; /* argument for IORING_(UN)REGISTER_PBUF_RING */ |