diff options
Diffstat (limited to 'samples/bpf')
| -rw-r--r-- | samples/bpf/Makefile | 1 | ||||
| -rw-r--r-- | samples/bpf/xdpsock.h | 11 | ||||
| -rw-r--r-- | samples/bpf/xdpsock_kern.c | 24 | ||||
| -rw-r--r-- | samples/bpf/xdpsock_user.c | 141 |
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); |