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-rw-r--r--samples/bpf/Makefile1
-rw-r--r--samples/bpf/xdpsock.h11
-rw-r--r--samples/bpf/xdpsock_kern.c24
-rw-r--r--samples/bpf/xdpsock_user.c141
4 files changed, 135 insertions, 42 deletions
diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile
index 4df11ddb9c75..8a9af3ab7769 100644
--- a/samples/bpf/Makefile
+++ b/samples/bpf/Makefile
@@ -167,6 +167,7 @@ always += xdp_sample_pkts_kern.o
always += ibumad_kern.o
always += hbm_out_kern.o
always += hbm_edt_kern.o
+always += xdpsock_kern.o
ifeq ($(ARCH), arm)
# Strip all except -D__LINUX_ARM_ARCH__ option needed to handle linux
diff --git a/samples/bpf/xdpsock.h b/samples/bpf/xdpsock.h
new file mode 100644
index 000000000000..b7eca15c78cc
--- /dev/null
+++ b/samples/bpf/xdpsock.h
@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0
+ *
+ * Copyright(c) 2019 Intel Corporation.
+ */
+
+#ifndef XDPSOCK_H_
+#define XDPSOCK_H_
+
+#define MAX_SOCKS 4
+
+#endif /* XDPSOCK_H */
diff --git a/samples/bpf/xdpsock_kern.c b/samples/bpf/xdpsock_kern.c
new file mode 100644
index 000000000000..a06177c262cd
--- /dev/null
+++ b/samples/bpf/xdpsock_kern.c
@@ -0,0 +1,24 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/bpf.h>
+#include "bpf_helpers.h"
+#include "xdpsock.h"
+
+/* This XDP program is only needed for the XDP_SHARED_UMEM mode.
+ * If you do not use this mode, libbpf can supply an XDP program for you.
+ */
+
+struct {
+ __uint(type, BPF_MAP_TYPE_XSKMAP);
+ __uint(max_entries, MAX_SOCKS);
+ __uint(key_size, sizeof(int));
+ __uint(value_size, sizeof(int));
+} xsks_map SEC(".maps");
+
+static unsigned int rr;
+
+SEC("xdp_sock") int xdp_sock_prog(struct xdp_md *ctx)
+{
+ rr = (rr + 1) & (MAX_SOCKS - 1);
+
+ return bpf_redirect_map(&xsks_map, rr, XDP_DROP);
+}
diff --git a/samples/bpf/xdpsock_user.c b/samples/bpf/xdpsock_user.c
index 405c4e091f8b..d3dba93dbab3 100644
--- a/samples/bpf/xdpsock_user.c
+++ b/samples/bpf/xdpsock_user.c
@@ -29,6 +29,7 @@
#include "libbpf.h"
#include "xsk.h"
+#include "xdpsock.h"
#include <bpf/bpf.h>
#ifndef SOL_XDP
@@ -47,7 +48,6 @@
#define BATCH_SIZE 64
#define DEBUG_HEXDUMP 0
-#define MAX_SOCKS 8
typedef __u64 u64;
typedef __u32 u32;
@@ -75,7 +75,8 @@ static u32 opt_xdp_bind_flags;
static int opt_xsk_frame_size = XSK_UMEM__DEFAULT_FRAME_SIZE;
static int opt_timeout = 1000;
static bool opt_need_wakeup = true;
-static __u32 prog_id;
+static u32 opt_num_xsks = 1;
+static u32 prog_id;
struct xsk_umem_info {
struct xsk_ring_prod fq;
@@ -179,7 +180,7 @@ static void *poller(void *arg)
static void remove_xdp_program(void)
{
- __u32 curr_prog_id = 0;
+ u32 curr_prog_id = 0;
if (bpf_get_link_xdp_id(opt_ifindex, &curr_prog_id, opt_xdp_flags)) {
printf("bpf_get_link_xdp_id failed\n");
@@ -196,11 +197,11 @@ static void remove_xdp_program(void)
static void int_exit(int sig)
{
struct xsk_umem *umem = xsks[0]->umem->umem;
-
- (void)sig;
+ int i;
dump_stats();
- xsk_socket__delete(xsks[0]->xsk);
+ for (i = 0; i < num_socks; i++)
+ xsk_socket__delete(xsks[i]->xsk);
(void)xsk_umem__delete(umem);
remove_xdp_program();
@@ -290,8 +291,8 @@ static struct xsk_umem_info *xsk_configure_umem(void *buffer, u64 size)
.frame_headroom = XSK_UMEM__DEFAULT_FRAME_HEADROOM,
.flags = opt_umem_flags
};
-
- int ret;
+ int ret, i;
+ u32 idx;
umem = calloc(1, sizeof(*umem));
if (!umem)
@@ -303,6 +304,15 @@ static struct xsk_umem_info *xsk_configure_umem(void *buffer, u64 size)
if (ret)
exit_with_error(-ret);
+ ret = xsk_ring_prod__reserve(&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; i++)
+ *xsk_ring_prod__fill_addr(&umem->fq, idx++) =
+ i * opt_xsk_frame_size;
+ xsk_ring_prod__submit(&umem->fq, XSK_RING_PROD__DEFAULT_NUM_DESCS);
+
umem->buffer = buffer;
return umem;
}
@@ -312,8 +322,6 @@ static struct xsk_socket_info *xsk_configure_socket(struct xsk_umem_info *umem)
struct xsk_socket_config cfg;
struct xsk_socket_info *xsk;
int ret;
- u32 idx;
- int i;
xsk = calloc(1, sizeof(*xsk));
if (!xsk)
@@ -322,11 +330,15 @@ static struct xsk_socket_info *xsk_configure_socket(struct xsk_umem_info *umem)
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;
+ if (opt_num_xsks > 1)
+ cfg.libbpf_flags = XSK_LIBBPF_FLAGS__INHIBIT_PROG_LOAD;
+ else
+ 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);
+
+ ret = xsk_socket__create(&xsk->xsk, opt_if, opt_queue,
+ umem->umem, &xsk->rx, &xsk->tx, &cfg);
if (ret)
exit_with_error(-ret);
@@ -334,17 +346,6 @@ static struct xsk_socket_info *xsk_configure_socket(struct xsk_umem_info *umem)
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; i++)
- *xsk_ring_prod__fill_addr(&xsk->umem->fq, idx++) =
- i * opt_xsk_frame_size;
- xsk_ring_prod__submit(&xsk->umem->fq,
- XSK_RING_PROD__DEFAULT_NUM_DESCS);
-
return xsk;
}
@@ -363,6 +364,7 @@ static struct option long_options[] = {
{"frame-size", required_argument, 0, 'f'},
{"no-need-wakeup", no_argument, 0, 'm'},
{"unaligned", no_argument, 0, 'u'},
+ {"shared-umem", no_argument, 0, 'M'},
{0, 0, 0, 0}
};
@@ -386,6 +388,7 @@ static void usage(const char *prog)
" -m, --no-need-wakeup Turn off use of driver need wakeup flag.\n"
" -f, --frame-size=n Set the frame size (must be a power of two in aligned mode, default is %d).\n"
" -u, --unaligned Enable unaligned chunk placement\n"
+ " -M, --shared-umem Enable XDP_SHARED_UMEM\n"
"\n";
fprintf(stderr, str, prog, XSK_UMEM__DEFAULT_FRAME_SIZE);
exit(EXIT_FAILURE);
@@ -398,7 +401,7 @@ static void parse_command_line(int argc, char **argv)
opterr = 0;
for (;;) {
- c = getopt_long(argc, argv, "Frtli:q:psSNn:czf:mu",
+ c = getopt_long(argc, argv, "Frtli:q:psSNn:czf:muM",
long_options, &option_index);
if (c == -1)
break;
@@ -448,11 +451,14 @@ static void parse_command_line(int argc, char **argv)
break;
case 'f':
opt_xsk_frame_size = atoi(optarg);
+ break;
case 'm':
opt_need_wakeup = false;
opt_xdp_bind_flags &= ~XDP_USE_NEED_WAKEUP;
break;
-
+ case 'M':
+ opt_num_xsks = MAX_SOCKS;
+ break;
default:
usage(basename(argv[0]));
}
@@ -586,11 +592,9 @@ static void rx_drop(struct xsk_socket_info *xsk, struct pollfd *fds)
static void rx_drop_all(void)
{
- struct pollfd fds[MAX_SOCKS + 1];
+ struct pollfd fds[MAX_SOCKS] = {};
int i, ret;
- memset(fds, 0, sizeof(fds));
-
for (i = 0; i < num_socks; i++) {
fds[i].fd = xsk_socket__fd(xsks[i]->xsk);
fds[i].events = POLLIN;
@@ -633,11 +637,10 @@ static void tx_only(struct xsk_socket_info *xsk, u32 frame_nb)
static void tx_only_all(void)
{
- struct pollfd fds[MAX_SOCKS];
+ struct pollfd fds[MAX_SOCKS] = {};
u32 frame_nb[MAX_SOCKS] = {};
int i, ret;
- memset(fds, 0, sizeof(fds));
for (i = 0; i < num_socks; i++) {
fds[0].fd = xsk_socket__fd(xsks[i]->xsk);
fds[0].events = POLLOUT;
@@ -706,11 +709,9 @@ static void l2fwd(struct xsk_socket_info *xsk, struct pollfd *fds)
static void l2fwd_all(void)
{
- struct pollfd fds[MAX_SOCKS];
+ struct pollfd fds[MAX_SOCKS] = {};
int i, ret;
- memset(fds, 0, sizeof(fds));
-
for (i = 0; i < num_socks; i++) {
fds[i].fd = xsk_socket__fd(xsks[i]->xsk);
fds[i].events = POLLOUT | POLLIN;
@@ -728,13 +729,65 @@ static void l2fwd_all(void)
}
}
+static void load_xdp_program(char **argv, struct bpf_object **obj)
+{
+ struct bpf_prog_load_attr prog_load_attr = {
+ .prog_type = BPF_PROG_TYPE_XDP,
+ };
+ char xdp_filename[256];
+ int prog_fd;
+
+ snprintf(xdp_filename, sizeof(xdp_filename), "%s_kern.o", argv[0]);
+ prog_load_attr.file = xdp_filename;
+
+ 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);
+ }
+
+ 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);
+ }
+}
+
+static void enter_xsks_into_map(struct bpf_object *obj)
+{
+ struct bpf_map *map;
+ int i, xsks_map;
+
+ 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);
+ }
+
+ for (i = 0; i < num_socks; i++) {
+ int fd = xsk_socket__fd(xsks[i]->xsk);
+ int key, ret;
+
+ key = i;
+ ret = bpf_map_update_elem(xsks_map, &key, &fd, 0);
+ if (ret) {
+ fprintf(stderr, "ERROR: bpf_map_update_elem %d\n", i);
+ exit(EXIT_FAILURE);
+ }
+ }
+}
+
int main(int argc, char **argv)
{
struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY};
struct xsk_umem_info *umem;
+ struct bpf_object *obj;
pthread_t pt;
+ int i, ret;
void *bufs;
- int ret;
parse_command_line(argc, argv);
@@ -744,6 +797,9 @@ int main(int argc, char **argv)
exit(EXIT_FAILURE);
}
+ if (opt_num_xsks > 1)
+ load_xdp_program(argv, &obj);
+
/* Reserve memory for the umem. Use hugepages if unaligned chunk mode */
bufs = mmap(NULL, NUM_FRAMES * opt_xsk_frame_size,
PROT_READ | PROT_WRITE,
@@ -752,16 +808,17 @@ int main(int argc, char **argv)
printf("ERROR: mmap failed\n");
exit(EXIT_FAILURE);
}
- /* Create sockets... */
+
+ /* Create sockets... */
umem = xsk_configure_umem(bufs, NUM_FRAMES * opt_xsk_frame_size);
- xsks[num_socks++] = xsk_configure_socket(umem);
+ for (i = 0; i < opt_num_xsks; i++)
+ xsks[num_socks++] = xsk_configure_socket(umem);
- if (opt_bench == BENCH_TXONLY) {
- int i;
+ for (i = 0; i < NUM_FRAMES; i++)
+ gen_eth_frame(umem, i * opt_xsk_frame_size);
- for (i = 0; i < NUM_FRAMES; i++)
- (void)gen_eth_frame(umem, i * opt_xsk_frame_size);
- }
+ if (opt_num_xsks > 1 && opt_bench != BENCH_TXONLY)
+ enter_xsks_into_map(obj);
signal(SIGINT, int_exit);
signal(SIGTERM, int_exit);
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-22 22:13:46 +0000