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 | 56 | ||||
| -rw-r--r-- | samples/bpf/xdpsock_user.c | 841 |
4 files changed, 261 insertions, 648 deletions
diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile index a0ef7eddd0b3..a333e258f319 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 533ab81adfa1..000000000000 --- 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 b8ccd0802b3f..000000000000 --- 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 f73055e0191f..9c76d6d43deb 100644 --- a/samples/bpf/xdpsock_user.c +++ b/samples/bpf/xdpsock_user.c @@ -1,37 +1,36 @@ // SPDX-License-Identifier: GPL-2.0 /* Copyright(c) 2017 - 2018 Intel Corporation. */ -#include <assert.h> +#include <asm/barrier.h> #include <errno.h> #include <getopt.h> #include <libgen.h> #include <linux/bpf.h> +#include <linux/compiler.h> #include <linux/if_link.h> #include <linux/if_xdp.h> #include <linux/if_ether.h> +#include <locale.h> +#include <net/ethernet.h> #include <net/if.h> +#include <poll.h> +#include <pthread.h> #include <signal.h> #include <stdbool.h> #include <stdio.h> #include <stdlib.h> #include <string.h> -#include <net/ethernet.h> +#include <sys/mman.h> #include <sys/resource.h> #include <sys/socket.h> -#include <sys/mman.h> +#include <sys/types.h> #include <time.h> #include <unistd.h> -#include <pthread.h> -#include <locale.h> -#include <sys/types.h> -#include <poll.h> #include "bpf/libbpf.h" -#include "bpf_util.h" +#include "bpf/xsk.h" #include <bpf/bpf.h> -#include "xdpsock.h" - #ifndef SOL_XDP #define SOL_XDP 283 #endif @@ -44,17 +43,11 @@ #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; @@ -73,54 +66,31 @@ 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; static __u32 prog_id; -struct xdp_umem_uqueue { - u32 cached_prod; - u32 cached_cons; - u32 mask; - u32 size; - u32 *producer; - u32 *consumer; - u64 *ring; - void *map; +struct xsk_umem_info { + struct xsk_ring_prod fq; + struct xsk_ring_cons cq; + struct xsk_umem *umem; + void *buffer; }; -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 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 unsigned long get_nsecs(void) { @@ -130,225 +100,124 @@ 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) +static void print_benchmark(bool running) { - u32 free_entries = q->cached_cons - q->cached_prod; + const char *bench_str = "INVALID"; - if (free_entries >= ndescs) - return free_entries; + if (opt_bench == BENCH_RXDROP) + bench_str = "rxdrop"; + else if (opt_bench == BENCH_TXONLY) + bench_str = "txonly"; + else if (opt_bench == BENCH_L2FWD) + bench_str = "l2fwd"; - /* Refresh the local tail pointer */ - q->cached_cons = *q->consumer + q->size; - return q->cached_cons - q->cached_prod; -} + printf("%s:%d %s ", opt_if, opt_queue, bench_str); + if (opt_xdp_flags & XDP_FLAGS_SKB_MODE) + printf("xdp-skb "); + else if (opt_xdp_flags & XDP_FLAGS_DRV_MODE) + printf("xdp-drv "); + else + printf(" "); -static inline u32 umem_nb_avail(struct xdp_umem_uqueue *q, u32 nb) -{ - u32 entries = q->cached_prod - q->cached_cons; + if (opt_poll) + printf("poll() "); - if (entries == 0) { - q->cached_prod = *q->producer; - entries = q->cached_prod - q->cached_cons; + if (running) { + printf("running..."); + fflush(stdout); } - - return (entries > nb) ? nb : entries; } -static inline u32 xq_nb_avail(struct xdp_uqueue *q, u32 ndescs) +static void dump_stats(void) { - u32 entries = q->cached_prod - q->cached_cons; + unsigned long now = get_nsecs(); + long dt = now - prev_time; + int i; - if (entries == 0) { - q->cached_prod = *q->producer; - entries = q->cached_prod - q->cached_cons; - } + prev_time = now; - return (entries > ndescs) ? ndescs : entries; -} + for (i = 0; i < num_socks && xsks[i]; i++) { + char *fmt = "%-15s %'-11.0f %'-11lu\n"; + double rx_pps, tx_pps; -static inline int umem_fill_to_kernel_ex(struct xdp_umem_uqueue *fq, - struct xdp_desc *d, - size_t nb) -{ - u32 i; + rx_pps = (xsks[i]->rx_npkts - xsks[i]->prev_rx_npkts) * + 1000000000. / dt; + tx_pps = (xsks[i]->tx_npkts - xsks[i]->prev_tx_npkts) * + 1000000000. / dt; - if (umem_nb_free(fq, nb) < nb) - return -ENOSPC; + printf("\n sock%d@", i); + print_benchmark(false); + printf("\n"); - for (i = 0; i < nb; i++) { - u32 idx = fq->cached_prod++ & fq->mask; + printf("%-15s %-11s %-11s %-11.2f\n", "", "pps", "pkts", + dt / 1000000000.); + printf(fmt, "rx", rx_pps, xsks[i]->rx_npkts); + printf(fmt, "tx", tx_pps, xsks[i]->tx_npkts); - fq->ring[idx] = d[i].addr; + xsks[i]->prev_rx_npkts = xsks[i]->rx_npkts; + xsks[i]->prev_tx_npkts = xsks[i]->tx_npkts; } - - 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) +static void *poller(void *arg) { - 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]; + (void)arg; + for (;;) { + sleep(opt_interval); + dump_stats(); } - u_smp_wmb(); - - *fq->producer = fq->cached_prod; - - return 0; + return NULL; } -static inline size_t umem_complete_from_kernel(struct xdp_umem_uqueue *cq, - u64 *d, size_t nb) +static void remove_xdp_program(void) { - 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(); + __u32 curr_prog_id = 0; - *cq->consumer = cq->cached_cons; + if (bpf_get_link_xdp_id(opt_ifindex, &curr_prog_id, opt_xdp_flags)) { + printf("bpf_get_link_xdp_id failed\n"); + exit(EXIT_FAILURE); } - - return entries; -} - -static inline void *xq_get_data(struct xdpsock *xsk, u64 addr) -{ - return &xsk->umem->frames[addr]; + if (prog_id == curr_prog_id) + bpf_set_link_xdp_fd(opt_ifindex, -1, opt_xdp_flags); + else if (!curr_prog_id) + printf("couldn't find a prog id on a given interface\n"); + else + printf("program on interface changed, not removing\n"); } -static inline int xq_enq(struct xdp_uqueue *uq, - const struct xdp_desc *descs, - unsigned int ndescs) +static void int_exit(int sig) { - struct xdp_desc *r = uq->ring; - unsigned int i; + struct xsk_umem *umem = xsks[0]->umem->umem; - 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; - } + (void)sig; - u_smp_wmb(); + dump_stats(); + xsk_socket__delete(xsks[0]->xsk); + (void)xsk_umem__delete(umem); + remove_xdp_program(); - *uq->producer = uq->cached_prod; - return 0; + exit(EXIT_SUCCESS); } -static inline int xq_enq_tx_only(struct xdp_uqueue *uq, - unsigned int id, unsigned int ndescs) +static void __exit_with_error(int error, const char *file, const char *func, + int line) { - 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; + fprintf(stderr, "%s:%s:%i: errno: %d/\"%s\"\n", file, func, + line, error, strerror(error)); + dump_stats(); + remove_xdp_program(); + exit(EXIT_FAILURE); } -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(); +#define exit_with_error(error) __exit_with_error(error, __FILE__, __func__, \ + __LINE__) - *uq->consumer = uq->cached_cons; - } - - return entries; -} +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 void swap_mac_addresses(void *data) { @@ -397,258 +266,74 @@ 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->buffer, 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); + umem->buffer = buffer; 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 = bpf_get_link_xdp_id(opt_ifindex, &prog_id, opt_xdp_flags); + 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; } -static void print_benchmark(bool running) -{ - const char *bench_str = "INVALID"; - - if (opt_bench == BENCH_RXDROP) - bench_str = "rxdrop"; - else if (opt_bench == BENCH_TXONLY) - bench_str = "txonly"; - else if (opt_bench == BENCH_L2FWD) - bench_str = "l2fwd"; - - printf("%s:%d %s ", opt_if, opt_queue, bench_str); - if (opt_xdp_flags & XDP_FLAGS_SKB_MODE) - printf("xdp-skb "); - else if (opt_xdp_flags & XDP_FLAGS_DRV_MODE) - printf("xdp-drv "); - else - printf(" "); - - if (opt_poll) - printf("poll() "); - - if (running) { - printf("running..."); - fflush(stdout); - } -} - -static void dump_stats(void) -{ - unsigned long now = get_nsecs(); - long dt = now - prev_time; - int i; - - prev_time = now; - - for (i = 0; i < num_socks && xsks[i]; i++) { - char *fmt = "%-15s %'-11.0f %'-11lu\n"; - double rx_pps, tx_pps; - - rx_pps = (xsks[i]->rx_npkts - xsks[i]->prev_rx_npkts) * - 1000000000. / dt; - tx_pps = (xsks[i]->tx_npkts - xsks[i]->prev_tx_npkts) * - 1000000000. / dt; - - printf("\n sock%d@", i); - print_benchmark(false); - printf("\n"); - - printf("%-15s %-11s %-11s %-11.2f\n", "", "pps", "pkts", - dt / 1000000000.); - printf(fmt, "rx", rx_pps, xsks[i]->rx_npkts); - printf(fmt, "tx", tx_pps, xsks[i]->tx_npkts); - - xsks[i]->prev_rx_npkts = xsks[i]->rx_npkts; - xsks[i]->prev_tx_npkts = xsks[i]->tx_npkts; - } -} - -static void *poller(void *arg) -{ - (void)arg; - for (;;) { - sleep(opt_interval); - dump_stats(); - } - - return NULL; -} - -static void int_exit(int sig) -{ - __u32 curr_prog_id = 0; - - (void)sig; - dump_stats(); - if (bpf_get_link_xdp_id(opt_ifindex, &curr_prog_id, opt_xdp_flags)) { - printf("bpf_get_link_xdp_id failed\n"); - exit(EXIT_FAILURE); - } - if (prog_id == curr_prog_id) - bpf_set_link_xdp_fd(opt_ifindex, -1, opt_xdp_flags); - else if (!curr_prog_id) - printf("couldn't find a prog id on a given interface\n"); - else - printf("program on interface changed, not removing\n"); - exit(EXIT_SUCCESS); -} - static struct option long_options[] = { {"rxdrop", no_argument, 0, 'r'}, {"txonly", no_argument, 0, 't'}, @@ -656,7 +341,6 @@ 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'}, @@ -676,7 +360,6 @@ 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" @@ -715,9 +398,6 @@ 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; @@ -751,75 +431,104 @@ 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 = 0; + 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->buffer, 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) @@ -830,7 +539,7 @@ 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 */ } @@ -847,14 +556,14 @@ 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 */ @@ -864,50 +573,73 @@ 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 = 0; 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->buffer, 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; } } @@ -915,17 +647,10 @@ 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_prog_info info = {}; - __u32 info_len = sizeof(info); - 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); @@ -935,67 +660,22 @@ 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; - - 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_obj_get_info_by_fd(prog_fd, &info, &info_len); - if (ret) { - printf("can't get prog info - %s\n", strerror(errno)); - return 1; - } - prog_id = info.id; + ret = posix_memalign(&bufs, getpagesize(), /* PAGE_SIZE aligned */ + NUM_FRAMES * XSK_UMEM__DEFAULT_FRAME_SIZE); + if (ret) + exit_with_error(ret); - 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... */ + umem = xsk_configure_umem(bufs, + NUM_FRAMES * XSK_UMEM__DEFAULT_FRAME_SIZE); + xsks[num_socks++] = xsk_configure_socket(umem); - /* Create sockets... */ - xsks[num_socks++] = xsk_configure(NULL); - -#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); @@ -1005,7 +685,8 @@ 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(); |
