diff options
Diffstat (limited to 'include/uapi/linux')
| -rw-r--r-- | include/uapi/linux/io_uring.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/include/uapi/linux/io_uring.h b/include/uapi/linux/io_uring.h index c3f3ea997f3a..1d59c816a5b8 100644 --- a/include/uapi/linux/io_uring.h +++ b/include/uapi/linux/io_uring.h @@ -389,6 +389,9 @@ enum { #define IORING_OFF_SQ_RING 0ULL #define IORING_OFF_CQ_RING 0x8000000ULL #define IORING_OFF_SQES 0x10000000ULL +#define IORING_OFF_PBUF_RING 0x80000000ULL +#define IORING_OFF_PBUF_SHIFT 16 +#define IORING_OFF_MMAP_MASK 0xf8000000ULL /* * Filled with the offset for mmap(2) @@ -635,6 +638,20 @@ struct io_uring_buf_ring { }; }; +/* + * Flags for IORING_REGISTER_PBUF_RING. + * + * IOU_PBUF_RING_MMAP: If set, kernel will allocate the memory for the ring. + * The application must not set a ring_addr in struct + * io_uring_buf_reg, instead it must subsequently call + * mmap(2) with the offset set as: + * IORING_OFF_PBUF_RING | (bgid << IORING_OFF_PBUF_SHIFT) + * to get a virtual mapping for the ring. + */ +enum { + IOU_PBUF_RING_MMAP = 1, +}; + /* argument for IORING_(UN)REGISTER_PBUF_RING */ struct io_uring_buf_reg { __u64 ring_addr; |