Date:   Tue, 29 Jan 2019 16:12:17 +0100
From:   Magnus Karlsson <magnus.karlsson@...el.com>
To:     magnus.karlsson@...el.com, bjorn.topel@...el.com, ast@...nel.org,
        daniel@...earbox.net, netdev@...r.kernel.org,
        jakub.kicinski@...ronome.com, bjorn.topel@...il.com,
        qi.z.zhang@...el.com
Cc:     brouer@...hat.com
Subject: [PATCH bpf-next v3 3/3] samples/bpf: convert xdpsock to use libbpf for AF_XDP access

This commit converts the xdpsock sample application to use the AF_XDP
functions present in libbpf. This cuts down the size of it by nearly
300 lines of code.

The default ring sizes plus the batch size has been increased and the
size of the umem area has decreased. This so that the sample application
will provide higher throughput. Note also that the shared umem code
has been removed from the sample as this is not supported by libbpf
at this point in time.

Signed-off-by: Magnus Karlsson <magnus.karlsson@...el.com>
---
 samples/bpf/Makefile       |   1 -
 samples/bpf/xdpsock.h      |  11 -
 samples/bpf/xdpsock_kern.c |  56 ----
 samples/bpf/xdpsock_user.c | 695 ++++++++++++---------------------------------
 4 files changed, 187 insertions(+), 576 deletions(-)
 delete mode 100644 samples/bpf/xdpsock.h
 delete mode 100644 samples/bpf/xdpsock_kern.c

diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile
index 66ae15f..56d9445 100644
--- a/samples/bpf/Makefile
+++ b/samples/bpf/Makefile
@@ -163,7 +163,6 @@ always += xdp2skb_meta_kern.o
 always += syscall_tp_kern.o
 always += cpustat_kern.o
 always += xdp_adjust_tail_kern.o
-always += xdpsock_kern.o
 always += xdp_fwd_kern.o
 always += task_fd_query_kern.o
 always += xdp_sample_pkts_kern.o
diff --git a/samples/bpf/xdpsock.h b/samples/bpf/xdpsock.h
deleted file mode 100644
index 533ab81..0000000
--- a/samples/bpf/xdpsock.h
+++ /dev/null
@@ -1,11 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef XDPSOCK_H_
-#define XDPSOCK_H_
-
-/* Power-of-2 number of sockets */
-#define MAX_SOCKS 4
-
-/* Round-robin receive */
-#define RR_LB 0
-
-#endif /* XDPSOCK_H_ */
diff --git a/samples/bpf/xdpsock_kern.c b/samples/bpf/xdpsock_kern.c
deleted file mode 100644
index b8ccd08..0000000
--- a/samples/bpf/xdpsock_kern.c
+++ /dev/null
@@ -1,56 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-#define KBUILD_MODNAME "foo"
-#include <uapi/linux/bpf.h>
-#include "bpf_helpers.h"
-
-#include "xdpsock.h"
-
-struct bpf_map_def SEC("maps") qidconf_map = {
-	.type		= BPF_MAP_TYPE_ARRAY,
-	.key_size	= sizeof(int),
-	.value_size	= sizeof(int),
-	.max_entries	= 1,
-};
-
-struct bpf_map_def SEC("maps") xsks_map = {
-	.type = BPF_MAP_TYPE_XSKMAP,
-	.key_size = sizeof(int),
-	.value_size = sizeof(int),
-	.max_entries = MAX_SOCKS,
-};
-
-struct bpf_map_def SEC("maps") rr_map = {
-	.type = BPF_MAP_TYPE_PERCPU_ARRAY,
-	.key_size = sizeof(int),
-	.value_size = sizeof(unsigned int),
-	.max_entries = 1,
-};
-
-SEC("xdp_sock")
-int xdp_sock_prog(struct xdp_md *ctx)
-{
-	int *qidconf, key = 0, idx;
-	unsigned int *rr;
-
-	qidconf = bpf_map_lookup_elem(&qidconf_map, &key);
-	if (!qidconf)
-		return XDP_ABORTED;
-
-	if (*qidconf != ctx->rx_queue_index)
-		return XDP_PASS;
-
-#if RR_LB /* NB! RR_LB is configured in xdpsock.h */
-	rr = bpf_map_lookup_elem(&rr_map, &key);
-	if (!rr)
-		return XDP_ABORTED;
-
-	*rr = (*rr + 1) & (MAX_SOCKS - 1);
-	idx = *rr;
-#else
-	idx = 0;
-#endif
-
-	return bpf_redirect_map(&xsks_map, idx, 0);
-}
-
-char _license[] SEC("license") = "GPL";
diff --git a/samples/bpf/xdpsock_user.c b/samples/bpf/xdpsock_user.c
index 57ecadc..647fa0d 100644
--- a/samples/bpf/xdpsock_user.c
+++ b/samples/bpf/xdpsock_user.c
@@ -1,7 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 /* Copyright(c) 2017 - 2018 Intel Corporation. */
 
-#include <assert.h>
 #include <errno.h>
 #include <getopt.h>
 #include <libgen.h>
@@ -27,11 +26,10 @@
 #include <poll.h>
 
 #include "bpf/libbpf.h"
+#include "bpf/xsk.h"
 #include "bpf_util.h"
 #include <bpf/bpf.h>
 
-#include "xdpsock.h"
-
 #ifndef SOL_XDP
 #define SOL_XDP 283
 #endif
@@ -44,17 +42,11 @@
 #define PF_XDP AF_XDP
 #endif
 
-#define NUM_FRAMES 131072
-#define FRAME_HEADROOM 0
-#define FRAME_SHIFT 11
-#define FRAME_SIZE 2048
-#define NUM_DESCS 1024
-#define BATCH_SIZE 16
-
-#define FQ_NUM_DESCS 1024
-#define CQ_NUM_DESCS 1024
+#define NUM_FRAMES (4 * 1024)
+#define BATCH_SIZE 64
 
 #define DEBUG_HEXDUMP 0
+#define MAX_SOCKS 8
 
 typedef __u64 u64;
 typedef __u32 u32;
@@ -73,53 +65,44 @@ static const char *opt_if = "";
 static int opt_ifindex;
 static int opt_queue;
 static int opt_poll;
-static int opt_shared_packet_buffer;
 static int opt_interval = 1;
 static u32 opt_xdp_bind_flags;
 
-struct xdp_umem_uqueue {
-	u32 cached_prod;
-	u32 cached_cons;
-	u32 mask;
-	u32 size;
-	u32 *producer;
-	u32 *consumer;
-	u64 *ring;
-	void *map;
-};
-
-struct xdp_umem {
-	char *frames;
-	struct xdp_umem_uqueue fq;
-	struct xdp_umem_uqueue cq;
-	int fd;
-};
-
-struct xdp_uqueue {
-	u32 cached_prod;
-	u32 cached_cons;
-	u32 mask;
-	u32 size;
-	u32 *producer;
-	u32 *consumer;
-	struct xdp_desc *ring;
-	void *map;
+struct xsk_umem_info {
+	struct xsk_ring_prod fq;
+	struct xsk_ring_cons cq;
+	struct xsk_umem *umem;
 };
 
-struct xdpsock {
-	struct xdp_uqueue rx;
-	struct xdp_uqueue tx;
-	int sfd;
-	struct xdp_umem *umem;
-	u32 outstanding_tx;
+struct xsk_socket_info {
+	struct xsk_ring_cons rx;
+	struct xsk_ring_prod tx;
+	struct xsk_umem_info *umem;
+	struct xsk_socket *xsk;
 	unsigned long rx_npkts;
 	unsigned long tx_npkts;
 	unsigned long prev_rx_npkts;
 	unsigned long prev_tx_npkts;
+	u32 outstanding_tx;
 };
 
 static int num_socks;
-struct xdpsock *xsks[MAX_SOCKS];
+struct xsk_socket_info *xsks[MAX_SOCKS];
+
+static void dump_stats(void);
+
+static void __exit_with_error(int error, const char *file, const char *func,
+			      int line)
+{
+	fprintf(stderr, "%s:%s:%i: errno: %d/\"%s\"\n", file, func,
+		line, error, strerror(error));
+	dump_stats();
+	bpf_set_link_xdp_fd(opt_ifindex, -1, opt_xdp_flags);
+	exit(EXIT_FAILURE);
+}
+
+#define exit_with_error(error) __exit_with_error(error, __FILE__, __func__, \
+						 __LINE__)
 
 static unsigned long get_nsecs(void)
 {
@@ -129,226 +112,12 @@ static unsigned long get_nsecs(void)
 	return ts.tv_sec * 1000000000UL + ts.tv_nsec;
 }
 
-static void dump_stats(void);
-
-#define lassert(expr)							\
-	do {								\
-		if (!(expr)) {						\
-			fprintf(stderr, "%s:%s:%i: Assertion failed: "	\
-				#expr ": errno: %d/\"%s\"\n",		\
-				__FILE__, __func__, __LINE__,		\
-				errno, strerror(errno));		\
-			dump_stats();					\
-			exit(EXIT_FAILURE);				\
-		}							\
-	} while (0)
-
-#define barrier() __asm__ __volatile__("": : :"memory")
-#ifdef __aarch64__
-#define u_smp_rmb() __asm__ __volatile__("dmb ishld": : :"memory")
-#define u_smp_wmb() __asm__ __volatile__("dmb ishst": : :"memory")
-#else
-#define u_smp_rmb() barrier()
-#define u_smp_wmb() barrier()
-#endif
-#define likely(x) __builtin_expect(!!(x), 1)
-#define unlikely(x) __builtin_expect(!!(x), 0)
-
 static const char pkt_data[] =
 	"\x3c\xfd\xfe\x9e\x7f\x71\xec\xb1\xd7\x98\x3a\xc0\x08\x00\x45\x00"
 	"\x00\x2e\x00\x00\x00\x00\x40\x11\x88\x97\x05\x08\x07\x08\xc8\x14"
 	"\x1e\x04\x10\x92\x10\x92\x00\x1a\x6d\xa3\x34\x33\x1f\x69\x40\x6b"
 	"\x54\x59\xb6\x14\x2d\x11\x44\xbf\xaf\xd9\xbe\xaa";
 
-static inline u32 umem_nb_free(struct xdp_umem_uqueue *q, u32 nb)
-{
-	u32 free_entries = q->cached_cons - q->cached_prod;
-
-	if (free_entries >= nb)
-		return free_entries;
-
-	/* Refresh the local tail pointer */
-	q->cached_cons = *q->consumer + q->size;
-
-	return q->cached_cons - q->cached_prod;
-}
-
-static inline u32 xq_nb_free(struct xdp_uqueue *q, u32 ndescs)
-{
-	u32 free_entries = q->cached_cons - q->cached_prod;
-
-	if (free_entries >= ndescs)
-		return free_entries;
-
-	/* Refresh the local tail pointer */
-	q->cached_cons = *q->consumer + q->size;
-	return q->cached_cons - q->cached_prod;
-}
-
-static inline u32 umem_nb_avail(struct xdp_umem_uqueue *q, u32 nb)
-{
-	u32 entries = q->cached_prod - q->cached_cons;
-
-	if (entries == 0) {
-		q->cached_prod = *q->producer;
-		entries = q->cached_prod - q->cached_cons;
-	}
-
-	return (entries > nb) ? nb : entries;
-}
-
-static inline u32 xq_nb_avail(struct xdp_uqueue *q, u32 ndescs)
-{
-	u32 entries = q->cached_prod - q->cached_cons;
-
-	if (entries == 0) {
-		q->cached_prod = *q->producer;
-		entries = q->cached_prod - q->cached_cons;
-	}
-
-	return (entries > ndescs) ? ndescs : entries;
-}
-
-static inline int umem_fill_to_kernel_ex(struct xdp_umem_uqueue *fq,
-					 struct xdp_desc *d,
-					 size_t nb)
-{
-	u32 i;
-
-	if (umem_nb_free(fq, nb) < nb)
-		return -ENOSPC;
-
-	for (i = 0; i < nb; i++) {
-		u32 idx = fq->cached_prod++ & fq->mask;
-
-		fq->ring[idx] = d[i].addr;
-	}
-
-	u_smp_wmb();
-
-	*fq->producer = fq->cached_prod;
-
-	return 0;
-}
-
-static inline int umem_fill_to_kernel(struct xdp_umem_uqueue *fq, u64 *d,
-				      size_t nb)
-{
-	u32 i;
-
-	if (umem_nb_free(fq, nb) < nb)
-		return -ENOSPC;
-
-	for (i = 0; i < nb; i++) {
-		u32 idx = fq->cached_prod++ & fq->mask;
-
-		fq->ring[idx] = d[i];
-	}
-
-	u_smp_wmb();
-
-	*fq->producer = fq->cached_prod;
-
-	return 0;
-}
-
-static inline size_t umem_complete_from_kernel(struct xdp_umem_uqueue *cq,
-					       u64 *d, size_t nb)
-{
-	u32 idx, i, entries = umem_nb_avail(cq, nb);
-
-	u_smp_rmb();
-
-	for (i = 0; i < entries; i++) {
-		idx = cq->cached_cons++ & cq->mask;
-		d[i] = cq->ring[idx];
-	}
-
-	if (entries > 0) {
-		u_smp_wmb();
-
-		*cq->consumer = cq->cached_cons;
-	}
-
-	return entries;
-}
-
-static inline void *xq_get_data(struct xdpsock *xsk, u64 addr)
-{
-	return &xsk->umem->frames[addr];
-}
-
-static inline int xq_enq(struct xdp_uqueue *uq,
-			 const struct xdp_desc *descs,
-			 unsigned int ndescs)
-{
-	struct xdp_desc *r = uq->ring;
-	unsigned int i;
-
-	if (xq_nb_free(uq, ndescs) < ndescs)
-		return -ENOSPC;
-
-	for (i = 0; i < ndescs; i++) {
-		u32 idx = uq->cached_prod++ & uq->mask;
-
-		r[idx].addr = descs[i].addr;
-		r[idx].len = descs[i].len;
-	}
-
-	u_smp_wmb();
-
-	*uq->producer = uq->cached_prod;
-	return 0;
-}
-
-static inline int xq_enq_tx_only(struct xdp_uqueue *uq,
-				 unsigned int id, unsigned int ndescs)
-{
-	struct xdp_desc *r = uq->ring;
-	unsigned int i;
-
-	if (xq_nb_free(uq, ndescs) < ndescs)
-		return -ENOSPC;
-
-	for (i = 0; i < ndescs; i++) {
-		u32 idx = uq->cached_prod++ & uq->mask;
-
-		r[idx].addr	= (id + i) << FRAME_SHIFT;
-		r[idx].len	= sizeof(pkt_data) - 1;
-	}
-
-	u_smp_wmb();
-
-	*uq->producer = uq->cached_prod;
-	return 0;
-}
-
-static inline int xq_deq(struct xdp_uqueue *uq,
-			 struct xdp_desc *descs,
-			 int ndescs)
-{
-	struct xdp_desc *r = uq->ring;
-	unsigned int idx;
-	int i, entries;
-
-	entries = xq_nb_avail(uq, ndescs);
-
-	u_smp_rmb();
-
-	for (i = 0; i < entries; i++) {
-		idx = uq->cached_cons++ & uq->mask;
-		descs[i] = r[idx];
-	}
-
-	if (entries > 0) {
-		u_smp_wmb();
-
-		*uq->consumer = uq->cached_cons;
-	}
-
-	return entries;
-}
-
 static void swap_mac_addresses(void *data)
 {
 	struct ether_header *eth = (struct ether_header *)data;
@@ -396,165 +165,66 @@ static void hex_dump(void *pkt, size_t length, u64 addr)
 	printf("\n");
 }
 
-static size_t gen_eth_frame(char *frame)
+static size_t gen_eth_frame(struct xsk_umem_info *umem, u64 addr)
 {
-	memcpy(frame, pkt_data, sizeof(pkt_data) - 1);
+	memcpy(xsk_umem__get_data(umem->umem, addr), pkt_data,
+	       sizeof(pkt_data) - 1);
 	return sizeof(pkt_data) - 1;
 }
 
-static struct xdp_umem *xdp_umem_configure(int sfd)
+static struct xsk_umem_info *xsk_configure_umem(void *buffer, u64 size)
 {
-	int fq_size = FQ_NUM_DESCS, cq_size = CQ_NUM_DESCS;
-	struct xdp_mmap_offsets off;
-	struct xdp_umem_reg mr;
-	struct xdp_umem *umem;
-	socklen_t optlen;
-	void *bufs;
+	struct xsk_umem_info *umem;
+	int ret;
 
 	umem = calloc(1, sizeof(*umem));
-	lassert(umem);
-
-	lassert(posix_memalign(&bufs, getpagesize(), /* PAGE_SIZE aligned */
-			       NUM_FRAMES * FRAME_SIZE) == 0);
-
-	mr.addr = (__u64)bufs;
-	mr.len = NUM_FRAMES * FRAME_SIZE;
-	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,
-			   sizeof(int)) == 0);
-	lassert(setsockopt(sfd, SOL_XDP, XDP_UMEM_COMPLETION_RING, &cq_size,
-			   sizeof(int)) == 0);
-
-	optlen = sizeof(off);
-	lassert(getsockopt(sfd, SOL_XDP, XDP_MMAP_OFFSETS, &off,
-			   &optlen) == 0);
-
-	umem->fq.map = mmap(0, off.fr.desc +
-			    FQ_NUM_DESCS * sizeof(u64),
-			    PROT_READ | PROT_WRITE,
-			    MAP_SHARED | MAP_POPULATE, sfd,
-			    XDP_UMEM_PGOFF_FILL_RING);
-	lassert(umem->fq.map != MAP_FAILED);
-
-	umem->fq.mask = FQ_NUM_DESCS - 1;
-	umem->fq.size = FQ_NUM_DESCS;
-	umem->fq.producer = umem->fq.map + off.fr.producer;
-	umem->fq.consumer = umem->fq.map + off.fr.consumer;
-	umem->fq.ring = umem->fq.map + off.fr.desc;
-	umem->fq.cached_cons = FQ_NUM_DESCS;
-
-	umem->cq.map = mmap(0, off.cr.desc +
-			     CQ_NUM_DESCS * sizeof(u64),
-			     PROT_READ | PROT_WRITE,
-			     MAP_SHARED | MAP_POPULATE, sfd,
-			     XDP_UMEM_PGOFF_COMPLETION_RING);
-	lassert(umem->cq.map != MAP_FAILED);
-
-	umem->cq.mask = CQ_NUM_DESCS - 1;
-	umem->cq.size = CQ_NUM_DESCS;
-	umem->cq.producer = umem->cq.map + off.cr.producer;
-	umem->cq.consumer = umem->cq.map + off.cr.consumer;
-	umem->cq.ring = umem->cq.map + off.cr.desc;
-
-	umem->frames = bufs;
-	umem->fd = sfd;
+	if (!umem)
+		exit_with_error(errno);
 
-	if (opt_bench == BENCH_TXONLY) {
-		int i;
-
-		for (i = 0; i < NUM_FRAMES * FRAME_SIZE; i += FRAME_SIZE)
-			(void)gen_eth_frame(&umem->frames[i]);
-	}
+	ret = xsk_umem__create(&umem->umem, buffer, size, &umem->fq, &umem->cq,
+			       NULL);
+	if (ret)
+		exit_with_error(-ret);
 
 	return umem;
 }
 
-static struct xdpsock *xsk_configure(struct xdp_umem *umem)
+static struct xsk_socket_info *xsk_configure_socket(struct xsk_umem_info *umem)
 {
-	struct sockaddr_xdp sxdp = {};
-	struct xdp_mmap_offsets off;
-	int sfd, ndescs = NUM_DESCS;
-	struct xdpsock *xsk;
-	bool shared = true;
-	socklen_t optlen;
-	u64 i;
-
-	sfd = socket(PF_XDP, SOCK_RAW, 0);
-	lassert(sfd >= 0);
+	struct xsk_socket_config cfg;
+	struct xsk_socket_info *xsk;
+	int ret;
+	u32 idx;
+	int i;
 
 	xsk = calloc(1, sizeof(*xsk));
-	lassert(xsk);
-
-	xsk->sfd = sfd;
-	xsk->outstanding_tx = 0;
-
-	if (!umem) {
-		shared = false;
-		xsk->umem = xdp_umem_configure(sfd);
-	} else {
-		xsk->umem = umem;
-	}
-
-	lassert(setsockopt(sfd, SOL_XDP, XDP_RX_RING,
-			   &ndescs, sizeof(int)) == 0);
-	lassert(setsockopt(sfd, SOL_XDP, XDP_TX_RING,
-			   &ndescs, sizeof(int)) == 0);
-	optlen = sizeof(off);
-	lassert(getsockopt(sfd, SOL_XDP, XDP_MMAP_OFFSETS, &off,
-			   &optlen) == 0);
-
-	/* Rx */
-	xsk->rx.map = mmap(NULL,
-			   off.rx.desc +
-			   NUM_DESCS * sizeof(struct xdp_desc),
-			   PROT_READ | PROT_WRITE,
-			   MAP_SHARED | MAP_POPULATE, sfd,
-			   XDP_PGOFF_RX_RING);
-	lassert(xsk->rx.map != MAP_FAILED);
-
-	if (!shared) {
-		for (i = 0; i < NUM_DESCS * FRAME_SIZE; i += FRAME_SIZE)
-			lassert(umem_fill_to_kernel(&xsk->umem->fq, &i, 1)
-				== 0);
-	}
-
-	/* Tx */
-	xsk->tx.map = mmap(NULL,
-			   off.tx.desc +
-			   NUM_DESCS * sizeof(struct xdp_desc),
-			   PROT_READ | PROT_WRITE,
-			   MAP_SHARED | MAP_POPULATE, sfd,
-			   XDP_PGOFF_TX_RING);
-	lassert(xsk->tx.map != MAP_FAILED);
-
-	xsk->rx.mask = NUM_DESCS - 1;
-	xsk->rx.size = NUM_DESCS;
-	xsk->rx.producer = xsk->rx.map + off.rx.producer;
-	xsk->rx.consumer = xsk->rx.map + off.rx.consumer;
-	xsk->rx.ring = xsk->rx.map + off.rx.desc;
-
-	xsk->tx.mask = NUM_DESCS - 1;
-	xsk->tx.size = NUM_DESCS;
-	xsk->tx.producer = xsk->tx.map + off.tx.producer;
-	xsk->tx.consumer = xsk->tx.map + off.tx.consumer;
-	xsk->tx.ring = xsk->tx.map + off.tx.desc;
-	xsk->tx.cached_cons = NUM_DESCS;
-
-	sxdp.sxdp_family = PF_XDP;
-	sxdp.sxdp_ifindex = opt_ifindex;
-	sxdp.sxdp_queue_id = opt_queue;
-
-	if (shared) {
-		sxdp.sxdp_flags = XDP_SHARED_UMEM;
-		sxdp.sxdp_shared_umem_fd = umem->fd;
-	} else {
-		sxdp.sxdp_flags = opt_xdp_bind_flags;
-	}
-
-	lassert(bind(sfd, (struct sockaddr *)&sxdp, sizeof(sxdp)) == 0);
+	if (!xsk)
+		exit_with_error(errno);
+
+	xsk->umem = umem;
+	cfg.rx_size = XSK_RING_CONS__DEFAULT_NUM_DESCS;
+	cfg.tx_size = XSK_RING_PROD__DEFAULT_NUM_DESCS;
+	cfg.libbpf_flags = 0;
+	cfg.xdp_flags = opt_xdp_flags;
+	cfg.bind_flags = opt_xdp_bind_flags;
+	ret = xsk_socket__create(&xsk->xsk, opt_if, opt_queue, umem->umem,
+				 &xsk->rx, &xsk->tx, &cfg);
+	if (ret)
+		exit_with_error(-ret);
+
+
+	ret = xsk_ring_prod__reserve(&xsk->umem->fq,
+				     XSK_RING_PROD__DEFAULT_NUM_DESCS,
+				     &idx);
+	if (ret != XSK_RING_PROD__DEFAULT_NUM_DESCS)
+		exit_with_error(-ret);
+	for (i = 0;
+	     i < XSK_RING_PROD__DEFAULT_NUM_DESCS *
+		     XSK_UMEM__DEFAULT_FRAME_SIZE;
+	     i += XSK_UMEM__DEFAULT_FRAME_SIZE)
+		*xsk_ring_prod__fill_addr(&xsk->umem->fq, idx++) = i;
+	xsk_ring_prod__submit(&xsk->umem->fq,
+			      XSK_RING_PROD__DEFAULT_NUM_DESCS);
 
 	return xsk;
 }
@@ -631,8 +301,12 @@ static void *poller(void *arg)
 
 static void int_exit(int sig)
 {
+	struct xsk_umem *umem = xsks[0]->umem->umem;
+
 	(void)sig;
 	dump_stats();
+	xsk_socket__delete(xsks[0]->xsk);
+	(void)xsk_umem__delete(umem);
 	bpf_set_link_xdp_fd(opt_ifindex, -1, opt_xdp_flags);
 	exit(EXIT_SUCCESS);
 }
@@ -644,7 +318,6 @@ static struct option long_options[] = {
 	{"interface", required_argument, 0, 'i'},
 	{"queue", required_argument, 0, 'q'},
 	{"poll", no_argument, 0, 'p'},
-	{"shared-buffer", no_argument, 0, 's'},
 	{"xdp-skb", no_argument, 0, 'S'},
 	{"xdp-native", no_argument, 0, 'N'},
 	{"interval", required_argument, 0, 'n'},
@@ -664,7 +337,6 @@ static void usage(const char *prog)
 		"  -i, --interface=n	Run on interface n\n"
 		"  -q, --queue=n	Use queue n (default 0)\n"
 		"  -p, --poll		Use poll syscall\n"
-		"  -s, --shared-buffer	Use shared packet buffer\n"
 		"  -S, --xdp-skb=n	Use XDP skb-mod\n"
 		"  -N, --xdp-native=n	Enfore XDP native mode\n"
 		"  -n, --interval=n	Specify statistics update interval (default 1 sec).\n"
@@ -703,9 +375,6 @@ static void parse_command_line(int argc, char **argv)
 		case 'q':
 			opt_queue = atoi(optarg);
 			break;
-		case 's':
-			opt_shared_packet_buffer = 1;
-			break;
 		case 'p':
 			opt_poll = 1;
 			break;
@@ -736,75 +405,104 @@ static void parse_command_line(int argc, char **argv)
 			opt_if);
 		usage(basename(argv[0]));
 	}
+
 }
 
-static void kick_tx(int fd)
+static void kick_tx(struct xsk_socket_info *xsk)
 {
 	int ret;
 
-	ret = sendto(fd, NULL, 0, MSG_DONTWAIT, NULL, 0);
+	ret = sendto(xsk_socket__fd(xsk->xsk), NULL, 0, MSG_DONTWAIT, NULL, 0);
 	if (ret >= 0 || errno == ENOBUFS || errno == EAGAIN || errno == EBUSY)
 		return;
-	lassert(0);
+	exit_with_error(errno);
 }
 
-static inline void complete_tx_l2fwd(struct xdpsock *xsk)
+static inline void complete_tx_l2fwd(struct xsk_socket_info *xsk)
 {
-	u64 descs[BATCH_SIZE];
+	u32 idx_cq, idx_fq;
 	unsigned int rcvd;
 	size_t ndescs;
 
 	if (!xsk->outstanding_tx)
 		return;
 
-	kick_tx(xsk->sfd);
+	kick_tx(xsk);
 	ndescs = (xsk->outstanding_tx > BATCH_SIZE) ? BATCH_SIZE :
-		 xsk->outstanding_tx;
+		xsk->outstanding_tx;
 
 	/* re-add completed Tx buffers */
-	rcvd = umem_complete_from_kernel(&xsk->umem->cq, descs, ndescs);
+	rcvd = xsk_ring_cons__peek(&xsk->umem->cq, ndescs, &idx_cq);
 	if (rcvd > 0) {
-		umem_fill_to_kernel(&xsk->umem->fq, descs, rcvd);
+		unsigned int i;
+		int ret;
+
+		ret = xsk_ring_prod__reserve(&xsk->umem->fq, rcvd, &idx_fq);
+		while (ret != rcvd) {
+			if (ret < 0)
+				exit_with_error(-ret);
+			ret = xsk_ring_prod__reserve(&xsk->umem->fq, rcvd,
+						     &idx_fq);
+		}
+		for (i = 0; i < rcvd; i++)
+			*xsk_ring_prod__fill_addr(&xsk->umem->fq, idx_fq++) =
+				*xsk_ring_cons__comp_addr(&xsk->umem->cq,
+							  idx_cq++);
+
+		xsk_ring_prod__submit(&xsk->umem->fq, rcvd);
+		xsk_ring_cons__release(&xsk->umem->cq, rcvd);
 		xsk->outstanding_tx -= rcvd;
 		xsk->tx_npkts += rcvd;
 	}
 }
 
-static inline void complete_tx_only(struct xdpsock *xsk)
+static inline void complete_tx_only(struct xsk_socket_info *xsk)
 {
-	u64 descs[BATCH_SIZE];
 	unsigned int rcvd;
+	u32 idx;
 
 	if (!xsk->outstanding_tx)
 		return;
 
-	kick_tx(xsk->sfd);
+	kick_tx(xsk);
 
-	rcvd = umem_complete_from_kernel(&xsk->umem->cq, descs, BATCH_SIZE);
+	rcvd = xsk_ring_cons__peek(&xsk->umem->cq, BATCH_SIZE, &idx);
 	if (rcvd > 0) {
+		xsk_ring_cons__release(&xsk->umem->cq, rcvd);
 		xsk->outstanding_tx -= rcvd;
 		xsk->tx_npkts += rcvd;
 	}
 }
 
-static void rx_drop(struct xdpsock *xsk)
+static void rx_drop(struct xsk_socket_info *xsk)
 {
-	struct xdp_desc descs[BATCH_SIZE];
 	unsigned int rcvd, i;
+	u32 idx_rx, idx_fq;
+	int ret;
 
-	rcvd = xq_deq(&xsk->rx, descs, BATCH_SIZE);
+	rcvd = xsk_ring_cons__peek(&xsk->rx, BATCH_SIZE, &idx_rx);
 	if (!rcvd)
 		return;
 
+	ret = xsk_ring_prod__reserve(&xsk->umem->fq, rcvd, &idx_fq);
+	while (ret != rcvd) {
+		if (ret < 0)
+			exit_with_error(-ret);
+		ret = xsk_ring_prod__reserve(&xsk->umem->fq, rcvd, &idx_fq);
+	}
+
 	for (i = 0; i < rcvd; i++) {
-		char *pkt = xq_get_data(xsk, descs[i].addr);
+		u64 addr = xsk_ring_cons__rx_desc(&xsk->rx, idx_rx)->addr;
+		u32 len = xsk_ring_cons__rx_desc(&xsk->rx, idx_rx++)->len;
+		char *pkt = xsk_umem__get_data(xsk->umem->umem, addr);
 
-		hex_dump(pkt, descs[i].len, descs[i].addr);
+		hex_dump(pkt, len, addr);
+		*xsk_ring_prod__fill_addr(&xsk->umem->fq, idx_fq++) = addr;
 	}
 
+	xsk_ring_prod__submit(&xsk->umem->fq, rcvd);
+	xsk_ring_cons__release(&xsk->rx, rcvd);
 	xsk->rx_npkts += rcvd;
-
-	umem_fill_to_kernel_ex(&xsk->umem->fq, descs, rcvd);
 }
 
 static void rx_drop_all(void)
@@ -815,7 +513,7 @@ static void rx_drop_all(void)
 	memset(fds, 0, sizeof(fds));
 
 	for (i = 0; i < num_socks; i++) {
-		fds[i].fd = xsks[i]->sfd;
+		fds[i].fd = xsk_socket__fd(xsks[i]->xsk);
 		fds[i].events = POLLIN;
 		timeout = 1000; /* 1sn */
 	}
@@ -832,14 +530,14 @@ static void rx_drop_all(void)
 	}
 }
 
-static void tx_only(struct xdpsock *xsk)
+static void tx_only(struct xsk_socket_info *xsk)
 {
 	int timeout, ret, nfds = 1;
 	struct pollfd fds[nfds + 1];
-	unsigned int idx = 0;
+	u32 idx, frame_nb = 0;
 
 	memset(fds, 0, sizeof(fds));
-	fds[0].fd = xsk->sfd;
+	fds[0].fd = xsk_socket__fd(xsk->xsk);
 	fds[0].events = POLLOUT;
 	timeout = 1000; /* 1sn */
 
@@ -849,50 +547,73 @@ static void tx_only(struct xdpsock *xsk)
 			if (ret <= 0)
 				continue;
 
-			if (fds[0].fd != xsk->sfd ||
-			    !(fds[0].revents & POLLOUT))
+			if (!(fds[0].revents & POLLOUT))
 				continue;
 		}
 
-		if (xq_nb_free(&xsk->tx, BATCH_SIZE) >= BATCH_SIZE) {
-			lassert(xq_enq_tx_only(&xsk->tx, idx, BATCH_SIZE) == 0);
+		if (xsk_ring_prod__reserve(&xsk->tx, BATCH_SIZE, &idx) ==
+		    BATCH_SIZE) {
+			unsigned int i;
+
+			for (i = 0; i < BATCH_SIZE; i++) {
+				xsk_ring_prod__tx_desc(&xsk->tx, idx + i)->addr
+					= (frame_nb + i) <<
+					XSK_UMEM__DEFAULT_FRAME_SHIFT;
+				xsk_ring_prod__tx_desc(&xsk->tx, idx + i)->len =
+					sizeof(pkt_data) - 1;
+			}
 
+			xsk_ring_prod__submit(&xsk->tx, BATCH_SIZE);
 			xsk->outstanding_tx += BATCH_SIZE;
-			idx += BATCH_SIZE;
-			idx %= NUM_FRAMES;
+			frame_nb += BATCH_SIZE;
+			frame_nb %= NUM_FRAMES;
 		}
 
 		complete_tx_only(xsk);
 	}
 }
 
-static void l2fwd(struct xdpsock *xsk)
+static void l2fwd(struct xsk_socket_info *xsk)
 {
 	for (;;) {
-		struct xdp_desc descs[BATCH_SIZE];
 		unsigned int rcvd, i;
+		u32 idx_rx, idx_tx;
 		int ret;
 
 		for (;;) {
 			complete_tx_l2fwd(xsk);
 
-			rcvd = xq_deq(&xsk->rx, descs, BATCH_SIZE);
+			rcvd = xsk_ring_cons__peek(&xsk->rx, BATCH_SIZE,
+						   &idx_rx);
 			if (rcvd > 0)
 				break;
 		}
 
+		ret = xsk_ring_prod__reserve(&xsk->tx, rcvd, &idx_tx);
+		while (ret != rcvd) {
+			if (ret < 0)
+				exit_with_error(-ret);
+			ret = xsk_ring_prod__reserve(&xsk->tx, rcvd, &idx_tx);
+		}
+
 		for (i = 0; i < rcvd; i++) {
-			char *pkt = xq_get_data(xsk, descs[i].addr);
+			u64 addr = xsk_ring_cons__rx_desc(&xsk->rx,
+							  idx_rx)->addr;
+			u32 len = xsk_ring_cons__rx_desc(&xsk->rx,
+							 idx_rx++)->len;
+			char *pkt = xsk_umem__get_data(xsk->umem->umem, addr);
 
 			swap_mac_addresses(pkt);
 
-			hex_dump(pkt, descs[i].len, descs[i].addr);
+			hex_dump(pkt, len, addr);
+			xsk_ring_prod__tx_desc(&xsk->tx, idx_tx)->addr = addr;
+			xsk_ring_prod__tx_desc(&xsk->tx, idx_tx++)->len = len;
 		}
 
-		xsk->rx_npkts += rcvd;
+		xsk_ring_prod__submit(&xsk->tx, rcvd);
+		xsk_ring_cons__release(&xsk->rx, rcvd);
 
-		ret = xq_enq(&xsk->tx, descs, rcvd);
-		lassert(ret == 0);
+		xsk->rx_npkts += rcvd;
 		xsk->outstanding_tx += rcvd;
 	}
 }
@@ -900,15 +621,10 @@ static void l2fwd(struct xdpsock *xsk)
 int main(int argc, char **argv)
 {
 	struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY};
-	struct bpf_prog_load_attr prog_load_attr = {
-		.prog_type	= BPF_PROG_TYPE_XDP,
-	};
-	int prog_fd, qidconf_map, xsks_map;
-	struct bpf_object *obj;
-	char xdp_filename[256];
-	struct bpf_map *map;
-	int i, ret, key = 0;
+	struct xsk_umem_info *umem;
 	pthread_t pt;
+	void *bufs;
+	int ret;
 
 	parse_command_line(argc, argv);
 
@@ -918,60 +634,22 @@ int main(int argc, char **argv)
 		exit(EXIT_FAILURE);
 	}
 
-	snprintf(xdp_filename, sizeof(xdp_filename), "%s_kern.o", argv[0]);
-	prog_load_attr.file = xdp_filename;
+	ret = posix_memalign(&bufs, getpagesize(), /* PAGE_SIZE aligned */
+			     NUM_FRAMES * XSK_UMEM__DEFAULT_FRAME_SIZE);
+	if (ret)
+		exit_with_error(ret);
 
-	if (bpf_prog_load_xattr(&prog_load_attr, &obj, &prog_fd))
-		exit(EXIT_FAILURE);
-	if (prog_fd < 0) {
-		fprintf(stderr, "ERROR: no program found: %s\n",
-			strerror(prog_fd));
-		exit(EXIT_FAILURE);
-	}
-
-	map = bpf_object__find_map_by_name(obj, "qidconf_map");
-	qidconf_map = bpf_map__fd(map);
-	if (qidconf_map < 0) {
-		fprintf(stderr, "ERROR: no qidconf map found: %s\n",
-			strerror(qidconf_map));
-		exit(EXIT_FAILURE);
-	}
-
-	map = bpf_object__find_map_by_name(obj, "xsks_map");
-	xsks_map = bpf_map__fd(map);
-	if (xsks_map < 0) {
-		fprintf(stderr, "ERROR: no xsks map found: %s\n",
-			strerror(xsks_map));
-		exit(EXIT_FAILURE);
-	}
-
-	if (bpf_set_link_xdp_fd(opt_ifindex, prog_fd, opt_xdp_flags) < 0) {
-		fprintf(stderr, "ERROR: link set xdp fd failed\n");
-		exit(EXIT_FAILURE);
-	}
-
-	ret = bpf_map_update_elem(qidconf_map, &key, &opt_queue, 0);
-	if (ret) {
-		fprintf(stderr, "ERROR: bpf_map_update_elem qidconf\n");
-		exit(EXIT_FAILURE);
-	}
-
-	/* Create sockets... */
-	xsks[num_socks++] = xsk_configure(NULL);
+       /* Create sockets... */
+	umem = xsk_configure_umem(bufs,
+				  NUM_FRAMES * XSK_UMEM__DEFAULT_FRAME_SIZE);
+	xsks[num_socks++] = xsk_configure_socket(umem);
 
-#if RR_LB
-	for (i = 0; i < MAX_SOCKS - 1; i++)
-		xsks[num_socks++] = xsk_configure(xsks[0]->umem);
-#endif
+	if (opt_bench == BENCH_TXONLY) {
+		int i;
 
-	/* ...and insert them into the map. */
-	for (i = 0; i < num_socks; i++) {
-		key = i;
-		ret = bpf_map_update_elem(xsks_map, &key, &xsks[i]->sfd, 0);
-		if (ret) {
-			fprintf(stderr, "ERROR: bpf_map_update_elem %d\n", i);
-			exit(EXIT_FAILURE);
-		}
+		for (i = 0; i < NUM_FRAMES * XSK_UMEM__DEFAULT_FRAME_SIZE;
+		     i += XSK_UMEM__DEFAULT_FRAME_SIZE)
+			(void)gen_eth_frame(umem, i);
 	}
 
 	signal(SIGINT, int_exit);
@@ -981,7 +659,8 @@ int main(int argc, char **argv)
 	setlocale(LC_ALL, "");
 
 	ret = pthread_create(&pt, NULL, poller, NULL);
-	lassert(ret == 0);
+	if (ret)
+		exit_with_error(ret);
 
 	prev_time = get_nsecs();
 
-- 
2.7.4

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