diff options
Diffstat (limited to 'tools/testing/selftests/bpf/prog_tests/xdp_adjust_tail.c')
| -rw-r--r-- | tools/testing/selftests/bpf/prog_tests/xdp_adjust_tail.c | 124 |
1 files changed, 118 insertions, 6 deletions
diff --git a/tools/testing/selftests/bpf/prog_tests/xdp_adjust_tail.c b/tools/testing/selftests/bpf/prog_tests/xdp_adjust_tail.c index 3744196d7cba..d5c98f2cb12f 100644 --- a/tools/testing/selftests/bpf/prog_tests/xdp_adjust_tail.c +++ b/tools/testing/selftests/bpf/prog_tests/xdp_adjust_tail.c @@ -1,13 +1,14 @@ // SPDX-License-Identifier: GPL-2.0 #include <test_progs.h> +#include <network_helpers.h> -void test_xdp_adjust_tail(void) +void test_xdp_adjust_tail_shrink(void) { - const char *file = "./test_adjust_tail.o"; + const char *file = "./test_xdp_adjust_tail_shrink.o"; + __u32 duration, retval, size, expect_sz; struct bpf_object *obj; - char buf[128]; - __u32 duration, retval, size; int err, prog_fd; + char buf[128]; err = bpf_prog_load(file, BPF_PROG_TYPE_XDP, &obj, &prog_fd); if (CHECK_FAIL(err)) @@ -20,10 +21,121 @@ void test_xdp_adjust_tail(void) "ipv4", "err %d errno %d retval %d size %d\n", err, errno, retval, size); + expect_sz = sizeof(pkt_v6) - 20; /* Test shrink with 20 bytes */ err = bpf_prog_test_run(prog_fd, 1, &pkt_v6, sizeof(pkt_v6), buf, &size, &retval, &duration); - CHECK(err || retval != XDP_TX || size != 54, - "ipv6", "err %d errno %d retval %d size %d\n", + CHECK(err || retval != XDP_TX || size != expect_sz, + "ipv6", "err %d errno %d retval %d size %d expect-size %d\n", + err, errno, retval, size, expect_sz); + bpf_object__close(obj); +} + +void test_xdp_adjust_tail_grow(void) +{ + const char *file = "./test_xdp_adjust_tail_grow.o"; + struct bpf_object *obj; + char buf[4096]; /* avoid segfault: large buf to hold grow results */ + __u32 duration, retval, size, expect_sz; + int err, prog_fd; + + err = bpf_prog_load(file, BPF_PROG_TYPE_XDP, &obj, &prog_fd); + if (CHECK_FAIL(err)) + return; + + err = bpf_prog_test_run(prog_fd, 1, &pkt_v4, sizeof(pkt_v4), + buf, &size, &retval, &duration); + CHECK(err || retval != XDP_DROP, + "ipv4", "err %d errno %d retval %d size %d\n", err, errno, retval, size); + + expect_sz = sizeof(pkt_v6) + 40; /* Test grow with 40 bytes */ + err = bpf_prog_test_run(prog_fd, 1, &pkt_v6, sizeof(pkt_v6) /* 74 */, + buf, &size, &retval, &duration); + CHECK(err || retval != XDP_TX || size != expect_sz, + "ipv6", "err %d errno %d retval %d size %d expect-size %d\n", + err, errno, retval, size, expect_sz); + + bpf_object__close(obj); +} + +void test_xdp_adjust_tail_grow2(void) +{ + const char *file = "./test_xdp_adjust_tail_grow.o"; + char buf[4096]; /* avoid segfault: large buf to hold grow results */ + int tailroom = 320; /* SKB_DATA_ALIGN(sizeof(struct skb_shared_info))*/; + struct bpf_object *obj; + int err, cnt, i; + int max_grow; + + struct bpf_prog_test_run_attr tattr = { + .repeat = 1, + .data_in = &buf, + .data_out = &buf, + .data_size_in = 0, /* Per test */ + .data_size_out = 0, /* Per test */ + }; + + err = bpf_prog_load(file, BPF_PROG_TYPE_XDP, &obj, &tattr.prog_fd); + if (CHECK_ATTR(err, "load", "err %d errno %d\n", err, errno)) + return; + + /* Test case-64 */ + memset(buf, 1, sizeof(buf)); + tattr.data_size_in = 64; /* Determine test case via pkt size */ + tattr.data_size_out = 128; /* Limit copy_size */ + /* Kernel side alloc packet memory area that is zero init */ + err = bpf_prog_test_run_xattr(&tattr); + + CHECK_ATTR(errno != ENOSPC /* Due limit copy_size in bpf_test_finish */ + || tattr.retval != XDP_TX + || tattr.data_size_out != 192, /* Expected grow size */ + "case-64", + "err %d errno %d retval %d size %d\n", + err, errno, tattr.retval, tattr.data_size_out); + + /* Extra checks for data contents */ + CHECK_ATTR(tattr.data_size_out != 192 + || buf[0] != 1 || buf[63] != 1 /* 0-63 memset to 1 */ + || buf[64] != 0 || buf[127] != 0 /* 64-127 memset to 0 */ + || buf[128] != 1 || buf[191] != 1, /*128-191 memset to 1 */ + "case-64-data", + "err %d errno %d retval %d size %d\n", + err, errno, tattr.retval, tattr.data_size_out); + + /* Test case-128 */ + memset(buf, 2, sizeof(buf)); + tattr.data_size_in = 128; /* Determine test case via pkt size */ + tattr.data_size_out = sizeof(buf); /* Copy everything */ + err = bpf_prog_test_run_xattr(&tattr); + + max_grow = 4096 - XDP_PACKET_HEADROOM - tailroom; /* 3520 */ + CHECK_ATTR(err + || tattr.retval != XDP_TX + || tattr.data_size_out != max_grow,/* Expect max grow size */ + "case-128", + "err %d errno %d retval %d size %d expect-size %d\n", + err, errno, tattr.retval, tattr.data_size_out, max_grow); + + /* Extra checks for data content: Count grow size, will contain zeros */ + for (i = 0, cnt = 0; i < sizeof(buf); i++) { + if (buf[i] == 0) + cnt++; + } + CHECK_ATTR((cnt != (max_grow - tattr.data_size_in)) /* Grow increase */ + || tattr.data_size_out != max_grow, /* Total grow size */ + "case-128-data", + "err %d errno %d retval %d size %d grow-size %d\n", + err, errno, tattr.retval, tattr.data_size_out, cnt); + bpf_object__close(obj); } + +void test_xdp_adjust_tail(void) +{ + if (test__start_subtest("xdp_adjust_tail_shrink")) + test_xdp_adjust_tail_shrink(); + if (test__start_subtest("xdp_adjust_tail_grow")) + test_xdp_adjust_tail_grow(); + if (test__start_subtest("xdp_adjust_tail_grow2")) + test_xdp_adjust_tail_grow2(); +} |