Gecko [ v99win.today ]

Name	Size	Permission
9p	[ DIR ]	drwxr-xr-x
bluetooth	[ DIR ]	drwxr-xr-x
caif	[ DIR ]	drwxr-xr-x
iucv	[ DIR ]	drwxr-xr-x
netfilter	[ DIR ]	drwxr-xr-x
netns	[ DIR ]	drwxr-xr-x
nfc	[ DIR ]	drwxr-xr-x
phonet	[ DIR ]	drwxr-xr-x
sctp	[ DIR ]	drwxr-xr-x
tc_act	[ DIR ]	drwxr-xr-x
6lowpan.h	10.03 KB	-rw-r--r--
Space.h	737 B	-rw-r--r--
act_api.h	8.42 KB	-rw-r--r--
addrconf.h	13.95 KB	-rw-r--r--
af_ieee802154.h	1.19 KB	-rw-r--r--
af_rxrpc.h	2.73 KB	-rw-r--r--
af_unix.h	2.92 KB	-rw-r--r--
af_vsock.h	7.37 KB	-rw-r--r--
ah.h	382 B	-rw-r--r--
arp.h	2.03 KB	-rw-r--r--
atmclip.h	1.48 KB	-rw-r--r--
ax25.h	14.84 KB	-rw-r--r--
ax88796.h	1.41 KB	-rw-r--r--
bareudp.h	572 B	-rw-r--r--
bond_3ad.h	9.49 KB	-rw-r--r--
bond_alb.h	6.09 KB	-rw-r--r--
bond_options.h	3.76 KB	-rw-r--r--
bonding.h	20.18 KB	-rw-r--r--
bpf_sk_storage.h	1.74 KB	-rw-r--r--
busy_poll.h	3.85 KB	-rw-r--r--
calipso.h	1.55 KB	-rw-r--r--
cfg80211-wext.h	1.81 KB	-rw-r--r--
cfg80211.h	291.42 KB	-rw-r--r--
cfg802154.h	10.5 KB	-rw-r--r--
checksum.h	4.74 KB	-rw-r--r--
cipso_ipv4.h	7.37 KB	-rw-r--r--
cls_cgroup.h	2.04 KB	-rw-r--r--
codel.h	5.65 KB	-rw-r--r--
codel_impl.h	7.98 KB	-rw-r--r--
codel_qdisc.h	2.9 KB	-rw-r--r--
compat.h	2.53 KB	-rw-r--r--
datalink.h	619 B	-rw-r--r--
dcbevent.h	742 B	-rw-r--r--
dcbnl.h	4.22 KB	-rw-r--r--
devlink.h	62.1 KB	-rw-r--r--
dn.h	6.88 KB	-rw-r--r--
dn_dev.h	5.36 KB	-rw-r--r--
dn_fib.h	3.99 KB	-rw-r--r--
dn_neigh.h	968 B	-rw-r--r--
dn_nsp.h	5.39 KB	-rw-r--r--
dn_route.h	3.96 KB	-rw-r--r--
dsa.h	34.12 KB	-rw-r--r--
dsfield.h	1.12 KB	-rw-r--r--
dst.h	14.46 KB	-rw-r--r--
dst_cache.h	2.96 KB	-rw-r--r--
dst_metadata.h	5.39 KB	-rw-r--r--
dst_ops.h	2.07 KB	-rw-r--r--
erspan.h	8.96 KB	-rw-r--r--
esp.h	1.23 KB	-rw-r--r--
espintcp.h	966 B	-rw-r--r--
ethoc.h	391 B	-rw-r--r--
failover.h	1.15 KB	-rw-r--r--
fib_notifier.h	1.35 KB	-rw-r--r--
fib_rules.h	6.3 KB	-rw-r--r--
firewire.h	636 B	-rw-r--r--
flow.h	5.53 KB	-rw-r--r--
flow_dissector.h	9.89 KB	-rw-r--r--
flow_offload.h	15.34 KB	-rw-r--r--
fou.h	549 B	-rw-r--r--
fq.h	2.47 KB	-rw-r--r--
fq_impl.h	7.89 KB	-rw-r--r--
garp.h	2.62 KB	-rw-r--r--
gen_stats.h	2.82 KB	-rw-r--r--
genetlink.h	13.32 KB	-rw-r--r--
geneve.h	1.85 KB	-rw-r--r--
gre.h	3.29 KB	-rw-r--r--
gro.h	783 B	-rw-r--r--
gro_cells.h	443 B	-rw-r--r--
gtp.h	633 B	-rw-r--r--
gue.h	3.24 KB	-rw-r--r--
hwbm.h	969 B	-rw-r--r--
icmp.h	1.87 KB	-rw-r--r--
ieee80211_radiotap.h	13.2 KB	-rw-r--r--
ieee802154_netdev.h	8.75 KB	-rw-r--r--
if_inet6.h	6.3 KB	-rw-r--r--
ife.h	1.03 KB	-rw-r--r--
ila.h	291 B	-rw-r--r--
inet6_connection_sock.h	765 B	-rw-r--r--
inet6_hashtables.h	3.44 KB	-rw-r--r--
inet_common.h	2.55 KB	-rw-r--r--
inet_connection_sock.h	11.06 KB	-rw-r--r--
inet_ecn.h	7.45 KB	-rw-r--r--
inet_frag.h	4.93 KB	-rw-r--r--
inet_hashtables.h	13.99 KB	-rw-r--r--
inet_sock.h	9.25 KB	-rw-r--r--
inet_timewait_sock.h	3.65 KB	-rw-r--r--
inetpeer.h	3.29 KB	-rw-r--r--
ioam6.h	1.17 KB	-rw-r--r--
ip.h	22.08 KB	-rw-r--r--
ip6_checksum.h	2.71 KB	-rw-r--r--
ip6_fib.h	15.82 KB	-rw-r--r--
ip6_route.h	9.99 KB	-rw-r--r--
ip6_tunnel.h	4.97 KB	-rw-r--r--
ip_fib.h	15.86 KB	-rw-r--r--
ip_tunnels.h	14.14 KB	-rw-r--r--
ip_vs.h	49.38 KB	-rw-r--r--
ipcomp.h	659 B	-rw-r--r--
ipconfig.h	811 B	-rw-r--r--
ipv6.h	35.34 KB	-rw-r--r--
ipv6_frag.h	3.28 KB	-rw-r--r--
ipv6_stubs.h	3.23 KB	-rw-r--r--
iw_handler.h	20.91 KB	-rw-r--r--
kcm.h	4.82 KB	-rw-r--r--
l3mdev.h	6.99 KB	-rw-r--r--
lag.h	409 B	-rw-r--r--
lapb.h	4.81 KB	-rw-r--r--
lib80211.h	3.92 KB	-rw-r--r--
llc.h	4.41 KB	-rw-r--r--
llc_c_ac.h	9.31 KB	-rw-r--r--
llc_c_ev.h	10.68 KB	-rw-r--r--
llc_c_st.h	1.72 KB	-rw-r--r--
llc_conn.h	4.06 KB	-rw-r--r--
llc_if.h	2.16 KB	-rw-r--r--
llc_pdu.h	14.44 KB	-rw-r--r--
llc_s_ac.h	1.55 KB	-rw-r--r--
llc_s_ev.h	2.2 KB	-rw-r--r--
llc_s_st.h	947 B	-rw-r--r--
llc_sap.h	1.08 KB	-rw-r--r--
lwtunnel.h	6.49 KB	-rw-r--r--
mac80211.h	266.84 KB	-rw-r--r--
mac802154.h	14.88 KB	-rw-r--r--
macsec.h	6.9 KB	-rw-r--r--
mctp.h	6.01 KB	-rw-r--r--
mctpdevice.h	735 B	-rw-r--r--
mip6.h	1016 B	-rw-r--r--
mld.h	2.85 KB	-rw-r--r--
mpls.h	943 B	-rw-r--r--
mpls_iptunnel.h	429 B	-rw-r--r--
mptcp.h	6.34 KB	-rw-r--r--
mrp.h	3.03 KB	-rw-r--r--
ncsi.h	1.92 KB	-rw-r--r--
ndisc.h	14.79 KB	-rw-r--r--
neighbour.h	15.97 KB	-rw-r--r--
net_failover.h	1023 B	-rw-r--r--
net_namespace.h	11.87 KB	-rw-r--r--
net_ratelimit.h	220 B	-rw-r--r--
netevent.h	1.02 KB	-rw-r--r--
netlabel.h	20.19 KB	-rw-r--r--
netlink.h	60.21 KB	-rw-r--r--
netprio_cgroup.h	1.02 KB	-rw-r--r--
netrom.h	7.71 KB	-rw-r--r--
nexthop.h	12.27 KB	-rw-r--r--
nl802154.h	12.09 KB	-rw-r--r--
nsh.h	12.31 KB	-rw-r--r--
p8022.h	447 B	-rw-r--r--
page_pool.h	8.88 KB	-rw-r--r--
pie.h	3.6 KB	-rw-r--r--
ping.h	2.9 KB	-rw-r--r--
pkt_cls.h	23.86 KB	-rw-r--r--
pkt_sched.h	5.37 KB	-rw-r--r--
pptp.h	557 B	-rw-r--r--
protocol.h	4 KB	-rw-r--r--
psample.h	1.06 KB	-rw-r--r--
psnap.h	351 B	-rw-r--r--
raw.h	2.08 KB	-rw-r--r--
rawv6.h	854 B	-rw-r--r--
red.h	11.38 KB	-rw-r--r--
regulatory.h	10.65 KB	-rw-r--r--
request_sock.h	6.47 KB	-rw-r--r--
rose.h	7.62 KB	-rw-r--r--
route.h	11.24 KB	-rw-r--r--
rpl.h	972 B	-rw-r--r--
rsi_91x.h	1.67 KB	-rw-r--r--
rtnetlink.h	6.72 KB	-rw-r--r--
rtnh.h	859 B	-rw-r--r--
sch_generic.h	33.86 KB	-rw-r--r--
scm.h	3.58 KB	-rw-r--r--
secure_seq.h	855 B	-rw-r--r--
seg6.h	2.18 KB	-rw-r--r--
seg6_hmac.h	1.44 KB	-rw-r--r--
seg6_local.h	644 B	-rw-r--r--
selftests.h	582 B	-rw-r--r--
slhc_vj.h	6.67 KB	-rw-r--r--
smc.h	2.45 KB	-rw-r--r--
snmp.h	5.14 KB	-rw-r--r--
sock.h	79.96 KB	-rw-r--r--
sock_reuseport.h	1.74 KB	-rw-r--r--
stp.h	383 B	-rw-r--r--
strparser.h	4.1 KB	-rw-r--r--
switchdev.h	13.96 KB	-rw-r--r--
tcp.h	71.78 KB	-rw-r--r--
tcp_states.h	1.2 KB	-rw-r--r--
timewait_sock.h	925 B	-rw-r--r--
tipc.h	2.35 KB	-rw-r--r--
tls.h	20.91 KB	-rw-r--r--
tls_toe.h	2.94 KB	-rw-r--r--
transp_v6.h	1.95 KB	-rw-r--r--
tso.h	566 B	-rw-r--r--
tun_proto.h	988 B	-rw-r--r--
udp.h	16.42 KB	-rw-r--r--
udp_tunnel.h	11.75 KB	-rw-r--r--
udplite.h	3.83 KB	-rw-r--r--
vsock_addr.h	662 B	-rw-r--r--
vxlan.h	13.91 KB	-rw-r--r--
wext.h	1.47 KB	-rw-r--r--
x25.h	9.49 KB	-rw-r--r--
x25device.h	387 B	-rw-r--r--
xdp.h	8.48 KB	-rw-r--r--
xdp_priv.h	446 B	-rw-r--r--
xdp_sock.h	2.04 KB	-rw-r--r--
xdp_sock_drv.h	5.53 KB	-rw-r--r--
xfrm.h	55.02 KB	-rw-r--r--
xsk_buff_pool.h	4.98 KB	-rw-r--r--

Code Editor : xdp.h

/* SPDX-License-Identifier: GPL-2.0-only */
/* include/net/xdp.h
 *
 * Copyright (c) 2017 Jesper Dangaard Brouer, Red Hat Inc.
 */
#ifndef __LINUX_NET_XDP_H__
#define __LINUX_NET_XDP_H__

#include <linux/skbuff.h> /* skb_shared_info */

/**
 * DOC: XDP RX-queue information
 *
 * The XDP RX-queue info (xdp_rxq_info) is associated with the driver
 * level RX-ring queues.  It is information that is specific to how
 * the driver have configured a given RX-ring queue.
 *
 * Each xdp_buff frame received in the driver carry a (pointer)
 * reference to this xdp_rxq_info structure.  This provides the XDP
 * data-path read-access to RX-info for both kernel and bpf-side
 * (limited subset).
 *
 * For now, direct access is only safe while running in NAPI/softirq
 * context.  Contents is read-mostly and must not be updated during
 * driver NAPI/softirq poll.
 *
 * The driver usage API is a register and unregister API.
 *
 * The struct is not directly tied to the XDP prog.  A new XDP prog
 * can be attached as long as it doesn't change the underlying
 * RX-ring.  If the RX-ring does change significantly, the NIC driver
 * naturally need to stop the RX-ring before purging and reallocating
 * memory.  In that process the driver MUST call unregistor (which
 * also apply for driver shutdown and unload).  The register API is
 * also mandatory during RX-ring setup.
 */

enum xdp_mem_type {
	MEM_TYPE_PAGE_SHARED = 0, /* Split-page refcnt based model */
	MEM_TYPE_PAGE_ORDER0,     /* Orig XDP full page model */
	MEM_TYPE_PAGE_POOL,
	MEM_TYPE_XSK_BUFF_POOL,
	MEM_TYPE_MAX,
};

/* XDP flags for ndo_xdp_xmit */
#define XDP_XMIT_FLUSH		(1U << 0)	/* doorbell signal consumer */
#define XDP_XMIT_FLAGS_MASK	XDP_XMIT_FLUSH

struct xdp_mem_info {
	u32 type; /* enum xdp_mem_type, but known size type */
	u32 id;
};

struct page_pool;

struct xdp_rxq_info {
	struct net_device *dev;
	u32 queue_index;
	u32 reg_state;
	struct xdp_mem_info mem;
	unsigned int napi_id;
} ____cacheline_aligned; /* perf critical, avoid false-sharing */

struct xdp_txq_info {
	struct net_device *dev;
};

struct xdp_buff {
	void *data;
	void *data_end;
	void *data_meta;
	void *data_hard_start;
	struct xdp_rxq_info *rxq;
	struct xdp_txq_info *txq;
	u32 frame_sz; /* frame size to deduce data_hard_end/reserved tailroom*/
};

static __always_inline void
xdp_init_buff(struct xdp_buff *xdp, u32 frame_sz, struct xdp_rxq_info *rxq)
{
	xdp->frame_sz = frame_sz;
	xdp->rxq = rxq;
}

static __always_inline void
xdp_prepare_buff(struct xdp_buff *xdp, unsigned char *hard_start,
		 int headroom, int data_len, const bool meta_valid)
{
	unsigned char *data = hard_start + headroom;

xdp->data_hard_start = hard_start;
	xdp->data = data;
	xdp->data_end = data + data_len;
	xdp->data_meta = meta_valid ? data : data + 1;
}

/* Reserve memory area at end-of data area.
 *
 * This macro reserves tailroom in the XDP buffer by limiting the
 * XDP/BPF data access to data_hard_end.  Notice same area (and size)
 * is used for XDP_PASS, when constructing the SKB via build_skb().
 */
#define xdp_data_hard_end(xdp)				\
	((xdp)->data_hard_start + (xdp)->frame_sz -	\
	 SKB_DATA_ALIGN(sizeof(struct skb_shared_info)))

static inline struct skb_shared_info *
xdp_get_shared_info_from_buff(struct xdp_buff *xdp)
{
	return (struct skb_shared_info *)xdp_data_hard_end(xdp);
}

struct xdp_frame {
	void *data;
	u16 len;
	u16 headroom;
	u32 metasize:8;
	u32 frame_sz:24;
	/* Lifetime of xdp_rxq_info is limited to NAPI/enqueue time,
	 * while mem info is valid on remote CPU.
	 */
	struct xdp_mem_info mem;
	struct net_device *dev_rx; /* used by cpumap */
};

#define XDP_BULK_QUEUE_SIZE	16
struct xdp_frame_bulk {
	int count;
	void *xa;
	void *q[XDP_BULK_QUEUE_SIZE];
};

static __always_inline void xdp_frame_bulk_init(struct xdp_frame_bulk *bq)
{
	/* bq->count will be zero'ed when bq->xa gets updated */
	bq->xa = NULL;
}

static inline struct skb_shared_info *
xdp_get_shared_info_from_frame(struct xdp_frame *frame)
{
	void *data_hard_start = frame->data - frame->headroom - sizeof(*frame);

return (struct skb_shared_info *)(data_hard_start + frame->frame_sz -
				SKB_DATA_ALIGN(sizeof(struct skb_shared_info)));
}

struct xdp_cpumap_stats {
	unsigned int redirect;
	unsigned int pass;
	unsigned int drop;
};

/* Clear kernel pointers in xdp_frame */
static inline void xdp_scrub_frame(struct xdp_frame *frame)
{
	frame->data = NULL;
	frame->dev_rx = NULL;
}

/* Avoids inlining WARN macro in fast-path */
void xdp_warn(const char *msg, const char *func, const int line);
#define XDP_WARN(msg) xdp_warn(msg, __func__, __LINE__)

struct xdp_frame *xdp_convert_zc_to_xdp_frame(struct xdp_buff *xdp);
struct sk_buff *__xdp_build_skb_from_frame(struct xdp_frame *xdpf,
					   struct sk_buff *skb,
					   struct net_device *dev);
struct sk_buff *xdp_build_skb_from_frame(struct xdp_frame *xdpf,
					 struct net_device *dev);
int xdp_alloc_skb_bulk(void **skbs, int n_skb, gfp_t gfp);
struct xdp_frame *xdpf_clone(struct xdp_frame *xdpf);

static inline
void xdp_convert_frame_to_buff(struct xdp_frame *frame, struct xdp_buff *xdp)
{
	xdp->data_hard_start = frame->data - frame->headroom - sizeof(*frame);
	xdp->data = frame->data;
	xdp->data_end = frame->data + frame->len;
	xdp->data_meta = frame->data - frame->metasize;
	xdp->frame_sz = frame->frame_sz;
}

static inline
int xdp_update_frame_from_buff(struct xdp_buff *xdp,
			       struct xdp_frame *xdp_frame)
{
	int metasize, headroom;

/* Assure headroom is available for storing info */
	headroom = xdp->data - xdp->data_hard_start;
	metasize = xdp->data - xdp->data_meta;
	metasize = metasize > 0 ? metasize : 0;
	if (unlikely((headroom - metasize) < sizeof(*xdp_frame)))
		return -ENOSPC;

/* Catch if driver didn't reserve tailroom for skb_shared_info */
	if (unlikely(xdp->data_end > xdp_data_hard_end(xdp))) {
		XDP_WARN("Driver BUG: missing reserved tailroom");
		return -ENOSPC;
	}

xdp_frame->data = xdp->data;
	xdp_frame->len  = xdp->data_end - xdp->data;
	xdp_frame->headroom = headroom - sizeof(*xdp_frame);
	xdp_frame->metasize = metasize;
	xdp_frame->frame_sz = xdp->frame_sz;

return 0;
}

/* Convert xdp_buff to xdp_frame */
static inline
struct xdp_frame *xdp_convert_buff_to_frame(struct xdp_buff *xdp)
{
	struct xdp_frame *xdp_frame;

if (xdp->rxq->mem.type == MEM_TYPE_XSK_BUFF_POOL)
		return xdp_convert_zc_to_xdp_frame(xdp);

/* Store info in top of packet */
	xdp_frame = xdp->data_hard_start;
	if (unlikely(xdp_update_frame_from_buff(xdp, xdp_frame) < 0))
		return NULL;

/* rxq only valid until napi_schedule ends, convert to xdp_mem_info */
	xdp_frame->mem = xdp->rxq->mem;

return xdp_frame;
}

void xdp_return_frame(struct xdp_frame *xdpf);
void xdp_return_frame_rx_napi(struct xdp_frame *xdpf);
void xdp_return_buff(struct xdp_buff *xdp);
void xdp_flush_frame_bulk(struct xdp_frame_bulk *bq);
void xdp_return_frame_bulk(struct xdp_frame *xdpf,
			   struct xdp_frame_bulk *bq);

/* When sending xdp_frame into the network stack, then there is no
 * return point callback, which is needed to release e.g. DMA-mapping
 * resources with page_pool.  Thus, have explicit function to release
 * frame resources.
 */
void __xdp_release_frame(void *data, struct xdp_mem_info *mem);
static inline void xdp_release_frame(struct xdp_frame *xdpf)
{
	struct xdp_mem_info *mem = &xdpf->mem;

/* Curr only page_pool needs this */
	if (mem->type == MEM_TYPE_PAGE_POOL)
		__xdp_release_frame(xdpf->data, mem);
}

int xdp_rxq_info_reg(struct xdp_rxq_info *xdp_rxq,
		     struct net_device *dev, u32 queue_index, unsigned int napi_id);
void xdp_rxq_info_unreg(struct xdp_rxq_info *xdp_rxq);
void xdp_rxq_info_unused(struct xdp_rxq_info *xdp_rxq);
bool xdp_rxq_info_is_reg(struct xdp_rxq_info *xdp_rxq);
int xdp_rxq_info_reg_mem_model(struct xdp_rxq_info *xdp_rxq,
			       enum xdp_mem_type type, void *allocator);
void xdp_rxq_info_unreg_mem_model(struct xdp_rxq_info *xdp_rxq);

/* Drivers not supporting XDP metadata can use this helper, which
 * rejects any room expansion for metadata as a result.
 */
static __always_inline void
xdp_set_data_meta_invalid(struct xdp_buff *xdp)
{
	xdp->data_meta = xdp->data + 1;
}

static __always_inline bool
xdp_data_meta_unsupported(const struct xdp_buff *xdp)
{
	return unlikely(xdp->data_meta > xdp->data);
}

static inline bool xdp_metalen_invalid(unsigned long metalen)
{
	return (metalen & (sizeof(__u32) - 1)) || (metalen > 32);
}

struct xdp_attachment_info {
	struct bpf_prog *prog;
	u32 flags;
};

struct netdev_bpf;
void xdp_attachment_setup(struct xdp_attachment_info *info,
			  struct netdev_bpf *bpf);

#define DEV_MAP_BULK_SIZE XDP_BULK_QUEUE_SIZE

#endif /* __LINUX_NET_XDP_H__ */

${this.title}

Code Editor : xdp.h