diff options
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/include/uapi/linux/if_xdp.h | 8 | ||||
| -rw-r--r-- | tools/lib/bpf/xsk.c | 12 | ||||
| -rw-r--r-- | tools/lib/bpf/xsk.h | 2 |
3 files changed, 21 insertions, 1 deletions
diff --git a/tools/include/uapi/linux/if_xdp.h b/tools/include/uapi/linux/if_xdp.h index caed8b1614ff..faaa5ca2a117 100644 --- a/tools/include/uapi/linux/if_xdp.h +++ b/tools/include/uapi/linux/if_xdp.h @@ -46,6 +46,7 @@ struct xdp_mmap_offsets { #define XDP_UMEM_FILL_RING 5 #define XDP_UMEM_COMPLETION_RING 6 #define XDP_STATISTICS 7 +#define XDP_OPTIONS 8 struct xdp_umem_reg { __u64 addr; /* Start of packet data area */ @@ -60,6 +61,13 @@ struct xdp_statistics { __u64 tx_invalid_descs; /* Dropped due to invalid descriptor */ }; +struct xdp_options { + __u32 flags; +}; + +/* Flags for the flags field of struct xdp_options */ +#define XDP_OPTIONS_ZEROCOPY (1 << 0) + /* Pgoff for mmaping the rings */ #define XDP_PGOFF_RX_RING 0 #define XDP_PGOFF_TX_RING 0x80000000 diff --git a/tools/lib/bpf/xsk.c b/tools/lib/bpf/xsk.c index 7ef6293b4fd7..bf15a80a37c2 100644 --- a/tools/lib/bpf/xsk.c +++ b/tools/lib/bpf/xsk.c @@ -65,6 +65,7 @@ struct xsk_socket { int xsks_map_fd; __u32 queue_id; char ifname[IFNAMSIZ]; + bool zc; }; struct xsk_nl_info { @@ -480,6 +481,7 @@ int xsk_socket__create(struct xsk_socket **xsk_ptr, const char *ifname, void *rx_map = NULL, *tx_map = NULL; struct sockaddr_xdp sxdp = {}; struct xdp_mmap_offsets off; + struct xdp_options opts; struct xsk_socket *xsk; socklen_t optlen; int err; @@ -597,6 +599,16 @@ int xsk_socket__create(struct xsk_socket **xsk_ptr, const char *ifname, } xsk->prog_fd = -1; + + optlen = sizeof(opts); + err = getsockopt(xsk->fd, SOL_XDP, XDP_OPTIONS, &opts, &optlen); + if (err) { + err = -errno; + goto out_mmap_tx; + } + + xsk->zc = opts.flags & XDP_OPTIONS_ZEROCOPY; + if (!(xsk->config.libbpf_flags & XSK_LIBBPF_FLAGS__INHIBIT_PROG_LOAD)) { err = xsk_setup_xdp_prog(xsk); if (err) diff --git a/tools/lib/bpf/xsk.h b/tools/lib/bpf/xsk.h index 82ea71a0f3ec..833a6e60d065 100644 --- a/tools/lib/bpf/xsk.h +++ b/tools/lib/bpf/xsk.h @@ -167,7 +167,7 @@ LIBBPF_API int xsk_socket__fd(const struct xsk_socket *xsk); #define XSK_RING_CONS__DEFAULT_NUM_DESCS 2048 #define XSK_RING_PROD__DEFAULT_NUM_DESCS 2048 -#define XSK_UMEM__DEFAULT_FRAME_SHIFT 11 /* 2048 bytes */ +#define XSK_UMEM__DEFAULT_FRAME_SHIFT 12 /* 4096 bytes */ #define XSK_UMEM__DEFAULT_FRAME_SIZE (1 << XSK_UMEM__DEFAULT_FRAME_SHIFT) #define XSK_UMEM__DEFAULT_FRAME_HEADROOM 0 |