selftests/bpf: Add strparser test for bpf
Add test cases for bpf + strparser and separated them from sockmap_basic, as strparser has more encapsulation and parsing capabilities compared to standard sockmap. Signed-off-by: Jiayuan Chen <mrpre@163.com> Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org> Acked-by: Jakub Sitnicki <jakub@cloudflare.com> Acked-by: John Fastabend <john.fastabend@gmail.com> Link: https://patch.msgid.link/20250122100917.49845-6-mrpre@163.com
This commit is contained in:
Jiayuan Chen
Martin KaFai Lau
parent
a0c1114950
commit
6fcfe96e0f
3 changed files with 507 additions and 53 deletions
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@ -531,57 +531,6 @@ out:
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test_sockmap_pass_prog__destroy(skel);
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}
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static void test_sockmap_stream_pass(void)
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{
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int zero = 0, sent, recvd;
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int verdict, parser;
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int err, map;
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int c = -1, p = -1;
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struct test_sockmap_pass_prog *pass = NULL;
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char snd[256] = "0123456789";
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char rcv[256] = "0";
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pass = test_sockmap_pass_prog__open_and_load();
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verdict = bpf_program__fd(pass->progs.prog_skb_verdict);
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parser = bpf_program__fd(pass->progs.prog_skb_parser);
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map = bpf_map__fd(pass->maps.sock_map_rx);
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err = bpf_prog_attach(parser, map, BPF_SK_SKB_STREAM_PARSER, 0);
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if (!ASSERT_OK(err, "bpf_prog_attach stream parser"))
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goto out;
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err = bpf_prog_attach(verdict, map, BPF_SK_SKB_STREAM_VERDICT, 0);
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if (!ASSERT_OK(err, "bpf_prog_attach stream verdict"))
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goto out;
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err = create_pair(AF_INET, SOCK_STREAM, &c, &p);
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if (err)
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goto out;
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/* sk_data_ready of 'p' will be replaced by strparser handler */
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err = bpf_map_update_elem(map, &zero, &p, BPF_NOEXIST);
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if (!ASSERT_OK(err, "bpf_map_update_elem(p)"))
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goto out_close;
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/*
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* as 'prog_skb_parser' return the original skb len and
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* 'prog_skb_verdict' return SK_PASS, the kernel will just
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* pass it through to original socket 'p'
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*/
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sent = xsend(c, snd, sizeof(snd), 0);
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ASSERT_EQ(sent, sizeof(snd), "xsend(c)");
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recvd = recv_timeout(p, rcv, sizeof(rcv), SOCK_NONBLOCK,
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IO_TIMEOUT_SEC);
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ASSERT_EQ(recvd, sizeof(rcv), "recv_timeout(p)");
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out_close:
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close(c);
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close(p);
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out:
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test_sockmap_pass_prog__destroy(pass);
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}
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static void test_sockmap_skb_verdict_fionread(bool pass_prog)
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{
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@ -1101,8 +1050,6 @@ void test_sockmap_basic(void)
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test_sockmap_progs_query(BPF_SK_SKB_VERDICT);
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if (test__start_subtest("sockmap skb_verdict shutdown"))
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test_sockmap_skb_verdict_shutdown();
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if (test__start_subtest("sockmap stream parser and verdict pass"))
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test_sockmap_stream_pass();
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if (test__start_subtest("sockmap skb_verdict fionread"))
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test_sockmap_skb_verdict_fionread(true);
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if (test__start_subtest("sockmap skb_verdict fionread on drop"))
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454
tools/testing/selftests/bpf/prog_tests/sockmap_strp.c
Normal file
454
tools/testing/selftests/bpf/prog_tests/sockmap_strp.c
Normal file
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@ -0,0 +1,454 @@
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// SPDX-License-Identifier: GPL-2.0
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#include <error.h>
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#include <netinet/tcp.h>
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#include <test_progs.h>
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#include "sockmap_helpers.h"
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#include "test_skmsg_load_helpers.skel.h"
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#include "test_sockmap_strp.skel.h"
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#define STRP_PKT_HEAD_LEN 4
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#define STRP_PKT_BODY_LEN 6
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#define STRP_PKT_FULL_LEN (STRP_PKT_HEAD_LEN + STRP_PKT_BODY_LEN)
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static const char packet[STRP_PKT_FULL_LEN] = "head+body\0";
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static const int test_packet_num = 100;
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/* Current implementation of tcp_bpf_recvmsg_parser() invokes data_ready
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* with sk held if an skb exists in sk_receive_queue. Then for the
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* data_ready implementation of strparser, it will delay the read
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* operation if sk is held and EAGAIN is returned.
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*/
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static int sockmap_strp_consume_pre_data(int p)
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{
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int recvd;
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bool retried = false;
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char rcv[10];
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retry:
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errno = 0;
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recvd = recv_timeout(p, rcv, sizeof(rcv), 0, 1);
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if (recvd < 0 && errno == EAGAIN && retried == false) {
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/* On the first call, EAGAIN will certainly be returned.
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* A 1-second wait is enough for the workqueue to finish.
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*/
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sleep(1);
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retried = true;
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goto retry;
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}
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if (!ASSERT_EQ(recvd, STRP_PKT_FULL_LEN, "recv error or truncated data") ||
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!ASSERT_OK(memcmp(packet, rcv, STRP_PKT_FULL_LEN),
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"data mismatch"))
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return -1;
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return 0;
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}
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static struct test_sockmap_strp *sockmap_strp_init(int *out_map, bool pass,
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bool need_parser)
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{
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struct test_sockmap_strp *strp = NULL;
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int verdict, parser;
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int err;
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strp = test_sockmap_strp__open_and_load();
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*out_map = bpf_map__fd(strp->maps.sock_map);
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if (need_parser)
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parser = bpf_program__fd(strp->progs.prog_skb_parser_partial);
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else
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parser = bpf_program__fd(strp->progs.prog_skb_parser);
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if (pass)
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verdict = bpf_program__fd(strp->progs.prog_skb_verdict_pass);
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else
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verdict = bpf_program__fd(strp->progs.prog_skb_verdict);
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err = bpf_prog_attach(parser, *out_map, BPF_SK_SKB_STREAM_PARSER, 0);
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if (!ASSERT_OK(err, "bpf_prog_attach stream parser"))
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goto err;
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err = bpf_prog_attach(verdict, *out_map, BPF_SK_SKB_STREAM_VERDICT, 0);
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if (!ASSERT_OK(err, "bpf_prog_attach stream verdict"))
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goto err;
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return strp;
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err:
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test_sockmap_strp__destroy(strp);
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return NULL;
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}
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/* Dispatch packets to different socket by packet size:
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*
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* ------ ------
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* | pkt4 || pkt1 |... > remote socket
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* ------ ------ / ------ ------
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* | pkt8 | pkt7 |...
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* ------ ------ \ ------ ------
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* | pkt3 || pkt2 |... > local socket
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* ------ ------
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*/
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static void test_sockmap_strp_dispatch_pkt(int family, int sotype)
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{
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int i, j, zero = 0, one = 1, recvd;
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int err, map;
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int c0 = -1, p0 = -1, c1 = -1, p1 = -1;
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struct test_sockmap_strp *strp = NULL;
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int test_cnt = 6;
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char rcv[10];
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struct {
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char data[7];
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int data_len;
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int send_cnt;
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int *receiver;
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} send_dir[2] = {
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/* data expected to deliver to local */
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{"llllll", 6, 0, &p0},
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/* data expected to deliver to remote */
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{"rrrrr", 5, 0, &c1}
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};
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strp = sockmap_strp_init(&map, false, false);
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if (!ASSERT_TRUE(strp, "sockmap_strp_init"))
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return;
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err = create_socket_pairs(family, sotype, &c0, &c1, &p0, &p1);
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if (!ASSERT_OK(err, "create_socket_pairs()"))
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goto out;
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err = bpf_map_update_elem(map, &zero, &p0, BPF_NOEXIST);
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if (!ASSERT_OK(err, "bpf_map_update_elem(p0)"))
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goto out_close;
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err = bpf_map_update_elem(map, &one, &p1, BPF_NOEXIST);
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if (!ASSERT_OK(err, "bpf_map_update_elem(p1)"))
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goto out_close;
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err = setsockopt(c1, IPPROTO_TCP, TCP_NODELAY, &zero, sizeof(zero));
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if (!ASSERT_OK(err, "setsockopt(TCP_NODELAY)"))
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goto out_close;
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/* deliver data with data size greater than 5 to local */
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strp->data->verdict_max_size = 5;
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for (i = 0; i < test_cnt; i++) {
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int d = i % 2;
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xsend(c0, send_dir[d].data, send_dir[d].data_len, 0);
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send_dir[d].send_cnt++;
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}
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for (i = 0; i < 2; i++) {
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for (j = 0; j < send_dir[i].send_cnt; j++) {
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int expected = send_dir[i].data_len;
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recvd = recv_timeout(*send_dir[i].receiver, rcv,
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expected, MSG_DONTWAIT,
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IO_TIMEOUT_SEC);
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if (!ASSERT_EQ(recvd, expected, "recv_timeout()"))
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goto out_close;
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if (!ASSERT_OK(memcmp(send_dir[i].data, rcv, recvd),
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"data mismatch"))
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goto out_close;
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}
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}
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out_close:
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close(c0);
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close(c1);
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close(p0);
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close(p1);
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out:
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test_sockmap_strp__destroy(strp);
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}
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/* We have multiple packets in one skb
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* ------------ ------------ ------------
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* | packet1 | packet2 | ...
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* ------------ ------------ ------------
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*/
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static void test_sockmap_strp_multiple_pkt(int family, int sotype)
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{
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int i, zero = 0;
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int sent, recvd, total;
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int err, map;
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int c = -1, p = -1;
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struct test_sockmap_strp *strp = NULL;
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char *snd = NULL, *rcv = NULL;
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strp = sockmap_strp_init(&map, true, true);
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if (!ASSERT_TRUE(strp, "sockmap_strp_init"))
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return;
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err = create_pair(family, sotype, &c, &p);
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if (err)
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goto out;
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err = bpf_map_update_elem(map, &zero, &p, BPF_NOEXIST);
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if (!ASSERT_OK(err, "bpf_map_update_elem(zero, p)"))
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goto out_close;
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/* construct multiple packets in one buffer */
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total = test_packet_num * STRP_PKT_FULL_LEN;
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snd = malloc(total);
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rcv = malloc(total + 1);
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if (!ASSERT_TRUE(snd, "malloc(snd)") ||
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!ASSERT_TRUE(rcv, "malloc(rcv)"))
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goto out_close;
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for (i = 0; i < test_packet_num; i++) {
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memcpy(snd + i * STRP_PKT_FULL_LEN,
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packet, STRP_PKT_FULL_LEN);
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}
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sent = xsend(c, snd, total, 0);
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if (!ASSERT_EQ(sent, total, "xsend(c)"))
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goto out_close;
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/* try to recv one more byte to avoid truncation check */
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recvd = recv_timeout(p, rcv, total + 1, MSG_DONTWAIT, IO_TIMEOUT_SEC);
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if (!ASSERT_EQ(recvd, total, "recv(rcv)"))
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goto out_close;
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/* we sent TCP segment with multiple encapsulation
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* then check whether packets are handled correctly
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*/
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if (!ASSERT_OK(memcmp(snd, rcv, total), "data mismatch"))
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goto out_close;
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out_close:
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close(c);
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close(p);
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if (snd)
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free(snd);
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if (rcv)
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free(rcv);
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out:
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test_sockmap_strp__destroy(strp);
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}
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/* Test strparser with partial read */
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static void test_sockmap_strp_partial_read(int family, int sotype)
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{
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int zero = 0, recvd, off;
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int err, map;
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int c = -1, p = -1;
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struct test_sockmap_strp *strp = NULL;
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char rcv[STRP_PKT_FULL_LEN + 1] = "0";
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strp = sockmap_strp_init(&map, true, true);
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if (!ASSERT_TRUE(strp, "sockmap_strp_init"))
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return;
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err = create_pair(family, sotype, &c, &p);
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if (err)
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goto out;
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/* sk_data_ready of 'p' will be replaced by strparser handler */
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err = bpf_map_update_elem(map, &zero, &p, BPF_NOEXIST);
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if (!ASSERT_OK(err, "bpf_map_update_elem(zero, p)"))
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goto out_close;
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/* 1.1 send partial head, 1 byte header left */
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off = STRP_PKT_HEAD_LEN - 1;
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xsend(c, packet, off, 0);
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recvd = recv_timeout(p, rcv, sizeof(rcv), MSG_DONTWAIT, 1);
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if (!ASSERT_EQ(-1, recvd, "partial head sent, expected no data"))
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goto out_close;
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/* 1.2 send remaining head and body */
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xsend(c, packet + off, STRP_PKT_FULL_LEN - off, 0);
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recvd = recv_timeout(p, rcv, sizeof(rcv), MSG_DONTWAIT, IO_TIMEOUT_SEC);
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if (!ASSERT_EQ(recvd, STRP_PKT_FULL_LEN, "expected full data"))
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goto out_close;
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/* 2.1 send partial head, 1 byte header left */
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off = STRP_PKT_HEAD_LEN - 1;
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xsend(c, packet, off, 0);
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/* 2.2 send remaining head and partial body, 1 byte body left */
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xsend(c, packet + off, STRP_PKT_FULL_LEN - off - 1, 0);
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off = STRP_PKT_FULL_LEN - 1;
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recvd = recv_timeout(p, rcv, sizeof(rcv), MSG_DONTWAIT, 1);
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if (!ASSERT_EQ(-1, recvd, "partial body sent, expected no data"))
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goto out_close;
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/* 2.3 send remaining body */
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xsend(c, packet + off, STRP_PKT_FULL_LEN - off, 0);
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recvd = recv_timeout(p, rcv, sizeof(rcv), MSG_DONTWAIT, IO_TIMEOUT_SEC);
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if (!ASSERT_EQ(recvd, STRP_PKT_FULL_LEN, "expected full data"))
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goto out_close;
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out_close:
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close(c);
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close(p);
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out:
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test_sockmap_strp__destroy(strp);
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}
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/* Test simple socket read/write with strparser + FIONREAD */
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static void test_sockmap_strp_pass(int family, int sotype, bool fionread)
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{
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int zero = 0, pkt_size = STRP_PKT_FULL_LEN, sent, recvd, avail;
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int err, map;
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int c = -1, p = -1;
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int test_cnt = 10, i;
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struct test_sockmap_strp *strp = NULL;
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char rcv[STRP_PKT_FULL_LEN + 1] = "0";
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strp = sockmap_strp_init(&map, true, true);
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if (!ASSERT_TRUE(strp, "sockmap_strp_init"))
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return;
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err = create_pair(family, sotype, &c, &p);
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if (err)
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goto out;
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/* inject some data before bpf process, it should be read
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* correctly because we check sk_receive_queue in
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* tcp_bpf_recvmsg_parser().
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*/
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sent = xsend(c, packet, pkt_size, 0);
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if (!ASSERT_EQ(sent, pkt_size, "xsend(pre-data)"))
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goto out_close;
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/* sk_data_ready of 'p' will be replaced by strparser handler */
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err = bpf_map_update_elem(map, &zero, &p, BPF_NOEXIST);
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if (!ASSERT_OK(err, "bpf_map_update_elem(p)"))
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goto out_close;
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/* consume previous data we injected */
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if (sockmap_strp_consume_pre_data(p))
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goto out_close;
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/* Previously, we encountered issues such as deadlocks and
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* sequence errors that resulted in the inability to read
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* continuously. Therefore, we perform multiple iterations
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* of testing here.
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*/
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for (i = 0; i < test_cnt; i++) {
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sent = xsend(c, packet, pkt_size, 0);
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if (!ASSERT_EQ(sent, pkt_size, "xsend(c)"))
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goto out_close;
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recvd = recv_timeout(p, rcv, sizeof(rcv), MSG_DONTWAIT,
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IO_TIMEOUT_SEC);
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if (!ASSERT_EQ(recvd, pkt_size, "recv_timeout(p)") ||
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!ASSERT_OK(memcmp(packet, rcv, pkt_size),
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"memcmp, data mismatch"))
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goto out_close;
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}
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if (fionread) {
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sent = xsend(c, packet, pkt_size, 0);
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if (!ASSERT_EQ(sent, pkt_size, "second xsend(c)"))
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goto out_close;
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err = ioctl(p, FIONREAD, &avail);
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if (!ASSERT_OK(err, "ioctl(FIONREAD) error") ||
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!ASSERT_EQ(avail, pkt_size, "ioctl(FIONREAD)"))
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goto out_close;
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recvd = recv_timeout(p, rcv, sizeof(rcv), MSG_DONTWAIT,
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IO_TIMEOUT_SEC);
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if (!ASSERT_EQ(recvd, pkt_size, "second recv_timeout(p)") ||
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!ASSERT_OK(memcmp(packet, rcv, pkt_size),
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"second memcmp, data mismatch"))
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goto out_close;
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||||
}
|
||||
|
||||
out_close:
|
||||
close(c);
|
||||
close(p);
|
||||
|
||||
out:
|
||||
test_sockmap_strp__destroy(strp);
|
||||
}
|
||||
|
||||
/* Test strparser with verdict mode */
|
||||
static void test_sockmap_strp_verdict(int family, int sotype)
|
||||
{
|
||||
int zero = 0, one = 1, sent, recvd, off;
|
||||
int err, map;
|
||||
int c0 = -1, p0 = -1, c1 = -1, p1 = -1;
|
||||
struct test_sockmap_strp *strp = NULL;
|
||||
char rcv[STRP_PKT_FULL_LEN + 1] = "0";
|
||||
|
||||
strp = sockmap_strp_init(&map, false, true);
|
||||
if (!ASSERT_TRUE(strp, "sockmap_strp_init"))
|
||||
return;
|
||||
|
||||
/* We simulate a reverse proxy server.
|
||||
* When p0 receives data from c0, we forward it to c1.
|
||||
* From c1's perspective, it will consider this data
|
||||
* as being sent by p1.
|
||||
*/
|
||||
err = create_socket_pairs(family, sotype, &c0, &c1, &p0, &p1);
|
||||
if (!ASSERT_OK(err, "create_socket_pairs()"))
|
||||
goto out;
|
||||
|
||||
err = bpf_map_update_elem(map, &zero, &p0, BPF_NOEXIST);
|
||||
if (!ASSERT_OK(err, "bpf_map_update_elem(p0)"))
|
||||
goto out_close;
|
||||
|
||||
err = bpf_map_update_elem(map, &one, &p1, BPF_NOEXIST);
|
||||
if (!ASSERT_OK(err, "bpf_map_update_elem(p1)"))
|
||||
goto out_close;
|
||||
|
||||
sent = xsend(c0, packet, STRP_PKT_FULL_LEN, 0);
|
||||
if (!ASSERT_EQ(sent, STRP_PKT_FULL_LEN, "xsend(c0)"))
|
||||
goto out_close;
|
||||
|
||||
recvd = recv_timeout(c1, rcv, sizeof(rcv), MSG_DONTWAIT,
|
||||
IO_TIMEOUT_SEC);
|
||||
if (!ASSERT_EQ(recvd, STRP_PKT_FULL_LEN, "recv_timeout(c1)") ||
|
||||
!ASSERT_OK(memcmp(packet, rcv, STRP_PKT_FULL_LEN),
|
||||
"received data does not match the sent data"))
|
||||
goto out_close;
|
||||
|
||||
/* send again to ensure the stream is functioning correctly. */
|
||||
sent = xsend(c0, packet, STRP_PKT_FULL_LEN, 0);
|
||||
if (!ASSERT_EQ(sent, STRP_PKT_FULL_LEN, "second xsend(c0)"))
|
||||
goto out_close;
|
||||
|
||||
/* partial read */
|
||||
off = STRP_PKT_FULL_LEN / 2;
|
||||
recvd = recv_timeout(c1, rcv, off, MSG_DONTWAIT,
|
||||
IO_TIMEOUT_SEC);
|
||||
recvd += recv_timeout(c1, rcv + off, sizeof(rcv) - off, MSG_DONTWAIT,
|
||||
IO_TIMEOUT_SEC);
|
||||
|
||||
if (!ASSERT_EQ(recvd, STRP_PKT_FULL_LEN, "partial recv_timeout(c1)") ||
|
||||
!ASSERT_OK(memcmp(packet, rcv, STRP_PKT_FULL_LEN),
|
||||
"partial received data does not match the sent data"))
|
||||
goto out_close;
|
||||
|
||||
out_close:
|
||||
close(c0);
|
||||
close(c1);
|
||||
close(p0);
|
||||
close(p1);
|
||||
out:
|
||||
test_sockmap_strp__destroy(strp);
|
||||
}
|
||||
|
||||
void test_sockmap_strp(void)
|
||||
{
|
||||
if (test__start_subtest("sockmap strp tcp pass"))
|
||||
test_sockmap_strp_pass(AF_INET, SOCK_STREAM, false);
|
||||
if (test__start_subtest("sockmap strp tcp v6 pass"))
|
||||
test_sockmap_strp_pass(AF_INET6, SOCK_STREAM, false);
|
||||
if (test__start_subtest("sockmap strp tcp pass fionread"))
|
||||
test_sockmap_strp_pass(AF_INET, SOCK_STREAM, true);
|
||||
if (test__start_subtest("sockmap strp tcp v6 pass fionread"))
|
||||
test_sockmap_strp_pass(AF_INET6, SOCK_STREAM, true);
|
||||
if (test__start_subtest("sockmap strp tcp verdict"))
|
||||
test_sockmap_strp_verdict(AF_INET, SOCK_STREAM);
|
||||
if (test__start_subtest("sockmap strp tcp v6 verdict"))
|
||||
test_sockmap_strp_verdict(AF_INET6, SOCK_STREAM);
|
||||
if (test__start_subtest("sockmap strp tcp partial read"))
|
||||
test_sockmap_strp_partial_read(AF_INET, SOCK_STREAM);
|
||||
if (test__start_subtest("sockmap strp tcp multiple packets"))
|
||||
test_sockmap_strp_multiple_pkt(AF_INET, SOCK_STREAM);
|
||||
if (test__start_subtest("sockmap strp tcp dispatch"))
|
||||
test_sockmap_strp_dispatch_pkt(AF_INET, SOCK_STREAM);
|
||||
}
|
||||
53
tools/testing/selftests/bpf/progs/test_sockmap_strp.c
Normal file
53
tools/testing/selftests/bpf/progs/test_sockmap_strp.c
Normal file
|
|
@ -0,0 +1,53 @@
|
|||
// SPDX-License-Identifier: GPL-2.0
|
||||
#include <linux/bpf.h>
|
||||
#include <bpf/bpf_helpers.h>
|
||||
#include <bpf/bpf_endian.h>
|
||||
int verdict_max_size = 10000;
|
||||
struct {
|
||||
__uint(type, BPF_MAP_TYPE_SOCKMAP);
|
||||
__uint(max_entries, 20);
|
||||
__type(key, int);
|
||||
__type(value, int);
|
||||
} sock_map SEC(".maps");
|
||||
|
||||
SEC("sk_skb/stream_verdict")
|
||||
int prog_skb_verdict(struct __sk_buff *skb)
|
||||
{
|
||||
__u32 one = 1;
|
||||
|
||||
if (skb->len > verdict_max_size)
|
||||
return SK_PASS;
|
||||
|
||||
return bpf_sk_redirect_map(skb, &sock_map, one, 0);
|
||||
}
|
||||
|
||||
SEC("sk_skb/stream_verdict")
|
||||
int prog_skb_verdict_pass(struct __sk_buff *skb)
|
||||
{
|
||||
return SK_PASS;
|
||||
}
|
||||
|
||||
SEC("sk_skb/stream_parser")
|
||||
int prog_skb_parser(struct __sk_buff *skb)
|
||||
{
|
||||
return skb->len;
|
||||
}
|
||||
|
||||
SEC("sk_skb/stream_parser")
|
||||
int prog_skb_parser_partial(struct __sk_buff *skb)
|
||||
{
|
||||
/* agreement with the test program on a 4-byte size header
|
||||
* and 6-byte body.
|
||||
*/
|
||||
if (skb->len < 4) {
|
||||
/* need more header to determine full length */
|
||||
return 0;
|
||||
}
|
||||
/* return full length decoded from header.
|
||||
* the return value may be larger than skb->len which
|
||||
* means framework must wait body coming.
|
||||
*/
|
||||
return 10;
|
||||
}
|
||||
|
||||
char _license[] SEC("license") = "GPL";
|
||||
Loading…
Add table
Reference in a new issue