^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /* SPDX-License-Identifier: GPL-2.0-only */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /* include/net/xdp.h
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Copyright (c) 2017 Jesper Dangaard Brouer, Red Hat Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) #ifndef __LINUX_NET_XDP_H__
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #define __LINUX_NET_XDP_H__
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/skbuff.h> /* skb_shared_info */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * DOC: XDP RX-queue information
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * The XDP RX-queue info (xdp_rxq_info) is associated with the driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) * level RX-ring queues. It is information that is specific to how
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) * the driver have configured a given RX-ring queue.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) * Each xdp_buff frame received in the driver carry a (pointer)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) * reference to this xdp_rxq_info structure. This provides the XDP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) * data-path read-access to RX-info for both kernel and bpf-side
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) * (limited subset).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) * For now, direct access is only safe while running in NAPI/softirq
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) * context. Contents is read-mostly and must not be updated during
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) * driver NAPI/softirq poll.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) * The driver usage API is a register and unregister API.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) * The struct is not directly tied to the XDP prog. A new XDP prog
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) * can be attached as long as it doesn't change the underlying
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) * RX-ring. If the RX-ring does change significantly, the NIC driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) * naturally need to stop the RX-ring before purging and reallocating
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) * memory. In that process the driver MUST call unregistor (which
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) * also apply for driver shutdown and unload). The register API is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) * also mandatory during RX-ring setup.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) enum xdp_mem_type {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) MEM_TYPE_PAGE_SHARED = 0, /* Split-page refcnt based model */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) MEM_TYPE_PAGE_ORDER0, /* Orig XDP full page model */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) MEM_TYPE_PAGE_POOL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) MEM_TYPE_XSK_BUFF_POOL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) MEM_TYPE_MAX,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) /* XDP flags for ndo_xdp_xmit */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) #define XDP_XMIT_FLUSH (1U << 0) /* doorbell signal consumer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) #define XDP_XMIT_FLAGS_MASK XDP_XMIT_FLUSH
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) struct xdp_mem_info {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) u32 type; /* enum xdp_mem_type, but known size type */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) u32 id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) struct page_pool;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) struct xdp_rxq_info {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) struct net_device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) u32 queue_index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) u32 reg_state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) struct xdp_mem_info mem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) } ____cacheline_aligned; /* perf critical, avoid false-sharing */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) struct xdp_txq_info {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) struct net_device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) struct xdp_buff {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) void *data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) void *data_end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) void *data_meta;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) void *data_hard_start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) struct xdp_rxq_info *rxq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) struct xdp_txq_info *txq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) u32 frame_sz; /* frame size to deduce data_hard_end/reserved tailroom*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) /* Reserve memory area at end-of data area.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) * This macro reserves tailroom in the XDP buffer by limiting the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) * XDP/BPF data access to data_hard_end. Notice same area (and size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) * is used for XDP_PASS, when constructing the SKB via build_skb().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) #define xdp_data_hard_end(xdp) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) ((xdp)->data_hard_start + (xdp)->frame_sz - \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) SKB_DATA_ALIGN(sizeof(struct skb_shared_info)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) static inline struct skb_shared_info *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) xdp_get_shared_info_from_buff(struct xdp_buff *xdp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) return (struct skb_shared_info *)xdp_data_hard_end(xdp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) struct xdp_frame {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) void *data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) u16 len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) u16 headroom;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) u32 metasize:8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) u32 frame_sz:24;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) /* Lifetime of xdp_rxq_info is limited to NAPI/enqueue time,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) * while mem info is valid on remote CPU.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) struct xdp_mem_info mem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) struct net_device *dev_rx; /* used by cpumap */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) static inline struct skb_shared_info *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) xdp_get_shared_info_from_frame(struct xdp_frame *frame)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) void *data_hard_start = frame->data - frame->headroom - sizeof(*frame);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) return (struct skb_shared_info *)(data_hard_start + frame->frame_sz -
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) SKB_DATA_ALIGN(sizeof(struct skb_shared_info)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) struct xdp_cpumap_stats {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) unsigned int redirect;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) unsigned int pass;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) unsigned int drop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) /* Clear kernel pointers in xdp_frame */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) static inline void xdp_scrub_frame(struct xdp_frame *frame)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) frame->data = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) frame->dev_rx = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) /* Avoids inlining WARN macro in fast-path */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) void xdp_warn(const char *msg, const char *func, const int line);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) #define XDP_WARN(msg) xdp_warn(msg, __func__, __LINE__)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) struct xdp_frame *xdp_convert_zc_to_xdp_frame(struct xdp_buff *xdp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) static inline
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) void xdp_convert_frame_to_buff(struct xdp_frame *frame, struct xdp_buff *xdp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) xdp->data_hard_start = frame->data - frame->headroom - sizeof(*frame);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) xdp->data = frame->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) xdp->data_end = frame->data + frame->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) xdp->data_meta = frame->data - frame->metasize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) xdp->frame_sz = frame->frame_sz;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) static inline
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) int xdp_update_frame_from_buff(struct xdp_buff *xdp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) struct xdp_frame *xdp_frame)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) int metasize, headroom;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) /* Assure headroom is available for storing info */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) headroom = xdp->data - xdp->data_hard_start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) metasize = xdp->data - xdp->data_meta;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) metasize = metasize > 0 ? metasize : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) if (unlikely((headroom - metasize) < sizeof(*xdp_frame)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) return -ENOSPC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) /* Catch if driver didn't reserve tailroom for skb_shared_info */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) if (unlikely(xdp->data_end > xdp_data_hard_end(xdp))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) XDP_WARN("Driver BUG: missing reserved tailroom");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) return -ENOSPC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) xdp_frame->data = xdp->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) xdp_frame->len = xdp->data_end - xdp->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) xdp_frame->headroom = headroom - sizeof(*xdp_frame);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) xdp_frame->metasize = metasize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) xdp_frame->frame_sz = xdp->frame_sz;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) /* Convert xdp_buff to xdp_frame */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) static inline
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) struct xdp_frame *xdp_convert_buff_to_frame(struct xdp_buff *xdp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) struct xdp_frame *xdp_frame;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) if (xdp->rxq->mem.type == MEM_TYPE_XSK_BUFF_POOL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) return xdp_convert_zc_to_xdp_frame(xdp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) /* Store info in top of packet */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) xdp_frame = xdp->data_hard_start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) if (unlikely(xdp_update_frame_from_buff(xdp, xdp_frame) < 0))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) /* rxq only valid until napi_schedule ends, convert to xdp_mem_info */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) xdp_frame->mem = xdp->rxq->mem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) return xdp_frame;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) void xdp_return_frame(struct xdp_frame *xdpf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) void xdp_return_frame_rx_napi(struct xdp_frame *xdpf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) void xdp_return_buff(struct xdp_buff *xdp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) /* When sending xdp_frame into the network stack, then there is no
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) * return point callback, which is needed to release e.g. DMA-mapping
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) * resources with page_pool. Thus, have explicit function to release
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) * frame resources.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) void __xdp_release_frame(void *data, struct xdp_mem_info *mem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) static inline void xdp_release_frame(struct xdp_frame *xdpf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) struct xdp_mem_info *mem = &xdpf->mem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) /* Curr only page_pool needs this */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) if (mem->type == MEM_TYPE_PAGE_POOL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) __xdp_release_frame(xdpf->data, mem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) int xdp_rxq_info_reg(struct xdp_rxq_info *xdp_rxq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) struct net_device *dev, u32 queue_index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) void xdp_rxq_info_unreg(struct xdp_rxq_info *xdp_rxq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) void xdp_rxq_info_unused(struct xdp_rxq_info *xdp_rxq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) bool xdp_rxq_info_is_reg(struct xdp_rxq_info *xdp_rxq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) int xdp_rxq_info_reg_mem_model(struct xdp_rxq_info *xdp_rxq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) enum xdp_mem_type type, void *allocator);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) void xdp_rxq_info_unreg_mem_model(struct xdp_rxq_info *xdp_rxq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) /* Drivers not supporting XDP metadata can use this helper, which
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) * rejects any room expansion for metadata as a result.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) static __always_inline void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) xdp_set_data_meta_invalid(struct xdp_buff *xdp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) xdp->data_meta = xdp->data + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) static __always_inline bool
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) xdp_data_meta_unsupported(const struct xdp_buff *xdp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) return unlikely(xdp->data_meta > xdp->data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) struct xdp_attachment_info {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) struct bpf_prog *prog;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) u32 flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) struct netdev_bpf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) void xdp_attachment_setup(struct xdp_attachment_info *info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) struct netdev_bpf *bpf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) #define DEV_MAP_BULK_SIZE 16
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) #endif /* __LINUX_NET_XDP_H__ */
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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