Commit a412ef54 authored by Björn Töpel's avatar Björn Töpel Committed by Daniel Borkmann
Browse files

samples/bpf: adapted to new uapi 



Here, the xdpsock sample application is adjusted to the new descriptor
format.

Signed-off-by: default avatarBjörn Töpel <bjorn.topel@intel.com>
Signed-off-by: default avatarDaniel Borkmann <daniel@iogearbox.net>
parent bbff2f32

samples/bpf/xdpsock_user.c

+36 −48
Original line number Diff line number Diff line
@@ -46,6 +46,7 @@ 


#define NUM_FRAMES 131072

#define FRAME_HEADROOM 0

#define FRAME_SHIFT 11

#define FRAME_SIZE 2048

#define NUM_DESCS 1024

#define BATCH_SIZE 16
@@ -55,6 +56,7 @@ 


#define DEBUG_HEXDUMP 0



typedef __u64 u64;

typedef __u32 u32;



static unsigned long prev_time;
@@ -81,12 +83,12 @@ struct xdp_umem_uqueue { 
	u32 size;

	u32 *producer;

	u32 *consumer;

	u32 *ring;

	u64 *ring;

	void *map;

};



struct xdp_umem {

	char (*frames)[FRAME_SIZE];

	char *frames;

	struct xdp_umem_uqueue fq;

	struct xdp_umem_uqueue cq;

	int fd;
@@ -214,7 +216,7 @@ static inline int umem_fill_to_kernel_ex(struct xdp_umem_uqueue *fq, 
	for (i = 0; i < nb; i++) {

		u32 idx = fq->cached_prod++ & fq->mask;



		fq->ring[idx] = d[i].idx;

		fq->ring[idx] = d[i].addr;

	}



	u_smp_wmb();
@@ -224,7 +226,7 @@ static inline int umem_fill_to_kernel_ex(struct xdp_umem_uqueue *fq, 
	return 0;

}



static inline int umem_fill_to_kernel(struct xdp_umem_uqueue *fq, u32 *d,

static inline int umem_fill_to_kernel(struct xdp_umem_uqueue *fq, u64 *d,

				      size_t nb)

{

	u32 i;
@@ -246,7 +248,7 @@ static inline int umem_fill_to_kernel(struct xdp_umem_uqueue *fq, u32 *d, 
}



static inline size_t umem_complete_from_kernel(struct xdp_umem_uqueue *cq,

					       u32 *d, size_t nb)

					       u64 *d, size_t nb)

{

	u32 idx, i, entries = umem_nb_avail(cq, nb);
@@ -266,10 +268,9 @@ static inline size_t umem_complete_from_kernel(struct xdp_umem_uqueue *cq, 
	return entries;

}



static inline void *xq_get_data(struct xdpsock *xsk, __u32 idx, __u32 off)

static inline void *xq_get_data(struct xdpsock *xsk, u64 addr)

{

	lassert(idx < NUM_FRAMES);

	return &xsk->umem->frames[idx][off];

	return &xsk->umem->frames[addr];

}



static inline int xq_enq(struct xdp_uqueue *uq,
@@ -285,9 +286,8 @@ static inline int xq_enq(struct xdp_uqueue *uq, 
	for (i = 0; i < ndescs; i++) {

		u32 idx = uq->cached_prod++ & uq->mask;



		r[idx].idx = descs[i].idx;

		r[idx].addr = descs[i].addr;

		r[idx].len = descs[i].len;

		r[idx].offset = descs[i].offset;

	}



	u_smp_wmb();
@@ -297,7 +297,7 @@ static inline int xq_enq(struct xdp_uqueue *uq, 
}



static inline int xq_enq_tx_only(struct xdp_uqueue *uq,

				 __u32 idx, unsigned int ndescs)

				 unsigned int id, unsigned int ndescs)

{

	struct xdp_desc *r = uq->ring;

	unsigned int i;
@@ -308,9 +308,8 @@ static inline int xq_enq_tx_only(struct xdp_uqueue *uq, 
	for (i = 0; i < ndescs; i++) {

		u32 idx = uq->cached_prod++ & uq->mask;



		r[idx].idx	= idx + i;

		r[idx].addr	= (id + i) << FRAME_SHIFT;

		r[idx].len	= sizeof(pkt_data) - 1;

		r[idx].offset	= 0;

	}



	u_smp_wmb();
@@ -357,17 +356,21 @@ static void swap_mac_addresses(void *data) 
	*dst_addr = tmp;

}



#if DEBUG_HEXDUMP

static void hex_dump(void *pkt, size_t length, const char *prefix)

static void hex_dump(void *pkt, size_t length, u64 addr)

{

	int i = 0;

	const unsigned char *address = (unsigned char *)pkt;

	const unsigned char *line = address;

	size_t line_size = 32;

	unsigned char c;

	char buf[32];

	int i = 0;



	if (!DEBUG_HEXDUMP)

		return;



	sprintf(buf, "addr=%llu", addr);

	printf("length = %zu\n", length);

	printf("%s | ", prefix);

	printf("%s | ", buf);

	while (length-- > 0) {

		printf("%02X ", *address++);

		if (!(++i % line_size) || (length == 0 && i % line_size)) {
@@ -382,12 +385,11 @@ static void hex_dump(void *pkt, size_t length, const char *prefix) 
			}

			printf("\n");

			if (length > 0)

				printf("%s | ", prefix);

				printf("%s | ", buf);

		}

	}

	printf("\n");

}

#endif



static size_t gen_eth_frame(char *frame)

{
@@ -412,8 +414,8 @@ static struct xdp_umem *xdp_umem_configure(int sfd) 


	mr.addr = (__u64)bufs;

	mr.len = NUM_FRAMES * FRAME_SIZE;

	mr.frame_size = FRAME_SIZE;

	mr.frame_headroom = FRAME_HEADROOM;

	mr.chunk_size = FRAME_SIZE;

	mr.headroom = FRAME_HEADROOM;



	lassert(setsockopt(sfd, SOL_XDP, XDP_UMEM_REG, &mr, sizeof(mr)) == 0);

	lassert(setsockopt(sfd, SOL_XDP, XDP_UMEM_FILL_RING, &fq_size,
@@ -426,7 +428,7 @@ static struct xdp_umem *xdp_umem_configure(int sfd) 
			   &optlen) == 0);



	umem->fq.map = mmap(0, off.fr.desc +

			    FQ_NUM_DESCS * sizeof(u32),

			    FQ_NUM_DESCS * sizeof(u64),

			    PROT_READ | PROT_WRITE,

			    MAP_SHARED | MAP_POPULATE, sfd,

			    XDP_UMEM_PGOFF_FILL_RING);
@@ -439,7 +441,7 @@ static struct xdp_umem *xdp_umem_configure(int sfd) 
	umem->fq.ring = umem->fq.map + off.fr.desc;



	umem->cq.map = mmap(0, off.cr.desc +

			     CQ_NUM_DESCS * sizeof(u32),

			     CQ_NUM_DESCS * sizeof(u64),

			     PROT_READ | PROT_WRITE,

			     MAP_SHARED | MAP_POPULATE, sfd,

			     XDP_UMEM_PGOFF_COMPLETION_RING);
@@ -451,14 +453,14 @@ static struct xdp_umem *xdp_umem_configure(int sfd) 
	umem->cq.consumer = umem->cq.map + off.cr.consumer;

	umem->cq.ring = umem->cq.map + off.cr.desc;



	umem->frames = (char (*)[FRAME_SIZE])bufs;

	umem->frames = bufs;

	umem->fd = sfd;



	if (opt_bench == BENCH_TXONLY) {

		int i;



		for (i = 0; i < NUM_FRAMES; i++)

			(void)gen_eth_frame(&umem->frames[i][0]);

		for (i = 0; i < NUM_FRAMES * FRAME_SIZE; i += FRAME_SIZE)

			(void)gen_eth_frame(&umem->frames[i]);

	}



	return umem;
@@ -472,7 +474,7 @@ static struct xdpsock *xsk_configure(struct xdp_umem *umem) 
	struct xdpsock *xsk;

	bool shared = true;

	socklen_t optlen;

	u32 i;

	u64 i;



	sfd = socket(PF_XDP, SOCK_RAW, 0);

	lassert(sfd >= 0);
@@ -508,7 +510,7 @@ static struct xdpsock *xsk_configure(struct xdp_umem *umem) 
	lassert(xsk->rx.map != MAP_FAILED);



	if (!shared) {

		for (i = 0; i < NUM_DESCS / 2; i++)

		for (i = 0; i < NUM_DESCS * FRAME_SIZE; i += FRAME_SIZE)

			lassert(umem_fill_to_kernel(&xsk->umem->fq, &i, 1)

				== 0);

	}
@@ -727,7 +729,7 @@ static void kick_tx(int fd) 


static inline void complete_tx_l2fwd(struct xdpsock *xsk)

{

	u32 descs[BATCH_SIZE];

	u64 descs[BATCH_SIZE];

	unsigned int rcvd;

	size_t ndescs;
@@ -749,7 +751,7 @@ static inline void complete_tx_l2fwd(struct xdpsock *xsk) 


static inline void complete_tx_only(struct xdpsock *xsk)

{

	u32 descs[BATCH_SIZE];

	u64 descs[BATCH_SIZE];

	unsigned int rcvd;



	if (!xsk->outstanding_tx)
@@ -774,17 +776,9 @@ static void rx_drop(struct xdpsock *xsk) 
		return;



	for (i = 0; i < rcvd; i++) {

		u32 idx = descs[i].idx;



		lassert(idx < NUM_FRAMES);

#if DEBUG_HEXDUMP

		char *pkt;

		char buf[32];

		char *pkt = xq_get_data(xsk, descs[i].addr);



		pkt = xq_get_data(xsk, idx, descs[i].offset);

		sprintf(buf, "idx=%d", idx);

		hex_dump(pkt, descs[i].len, buf);

#endif

		hex_dump(pkt, descs[i].len, descs[i].addr);

	}



	xsk->rx_npkts += rcvd;
@@ -867,17 +861,11 @@ static void l2fwd(struct xdpsock *xsk) 
		}



		for (i = 0; i < rcvd; i++) {

			char *pkt = xq_get_data(xsk, descs[i].idx,

						descs[i].offset);

			char *pkt = xq_get_data(xsk, descs[i].addr);



			swap_mac_addresses(pkt);

#if DEBUG_HEXDUMP

			char buf[32];

			u32 idx = descs[i].idx;



			sprintf(buf, "idx=%d", idx);

			hex_dump(pkt, descs[i].len, buf);

#endif

			hex_dump(pkt, descs[i].len, descs[i].addr);

		}



		xsk->rx_npkts += rcvd;

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