147 lines
3.9 KiB
C
147 lines
3.9 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <test_progs.h>
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#include <network_helpers.h>
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static void test_xdp_update_frags(void)
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{
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const char *file = "./test_xdp_update_frags.bpf.o";
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int err, prog_fd, max_skb_frags, buf_size, num;
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struct bpf_program *prog;
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struct bpf_object *obj;
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__u32 *offset;
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__u8 *buf;
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FILE *f;
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LIBBPF_OPTS(bpf_test_run_opts, topts);
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obj = bpf_object__open(file);
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if (libbpf_get_error(obj))
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return;
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prog = bpf_object__next_program(obj, NULL);
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if (bpf_object__load(obj))
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return;
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prog_fd = bpf_program__fd(prog);
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buf = malloc(128);
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if (!ASSERT_OK_PTR(buf, "alloc buf 128b"))
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goto out;
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memset(buf, 0, 128);
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offset = (__u32 *)buf;
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*offset = 16;
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buf[*offset] = 0xaa; /* marker at offset 16 (head) */
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buf[*offset + 15] = 0xaa; /* marker at offset 31 (head) */
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topts.data_in = buf;
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topts.data_out = buf;
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topts.data_size_in = 128;
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topts.data_size_out = 128;
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err = bpf_prog_test_run_opts(prog_fd, &topts);
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/* test_xdp_update_frags: buf[16,31]: 0xaa -> 0xbb */
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ASSERT_OK(err, "xdp_update_frag");
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ASSERT_EQ(topts.retval, XDP_PASS, "xdp_update_frag retval");
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ASSERT_EQ(buf[16], 0xbb, "xdp_update_frag buf[16]");
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ASSERT_EQ(buf[31], 0xbb, "xdp_update_frag buf[31]");
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free(buf);
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buf = malloc(9000);
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if (!ASSERT_OK_PTR(buf, "alloc buf 9Kb"))
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goto out;
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memset(buf, 0, 9000);
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offset = (__u32 *)buf;
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*offset = 5000;
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buf[*offset] = 0xaa; /* marker at offset 5000 (frag0) */
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buf[*offset + 15] = 0xaa; /* marker at offset 5015 (frag0) */
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topts.data_in = buf;
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topts.data_out = buf;
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topts.data_size_in = 9000;
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topts.data_size_out = 9000;
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err = bpf_prog_test_run_opts(prog_fd, &topts);
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/* test_xdp_update_frags: buf[5000,5015]: 0xaa -> 0xbb */
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ASSERT_OK(err, "xdp_update_frag");
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ASSERT_EQ(topts.retval, XDP_PASS, "xdp_update_frag retval");
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ASSERT_EQ(buf[5000], 0xbb, "xdp_update_frag buf[5000]");
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ASSERT_EQ(buf[5015], 0xbb, "xdp_update_frag buf[5015]");
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memset(buf, 0, 9000);
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offset = (__u32 *)buf;
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*offset = 3510;
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buf[*offset] = 0xaa; /* marker at offset 3510 (head) */
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buf[*offset + 15] = 0xaa; /* marker at offset 3525 (frag0) */
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err = bpf_prog_test_run_opts(prog_fd, &topts);
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/* test_xdp_update_frags: buf[3510,3525]: 0xaa -> 0xbb */
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ASSERT_OK(err, "xdp_update_frag");
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ASSERT_EQ(topts.retval, XDP_PASS, "xdp_update_frag retval");
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ASSERT_EQ(buf[3510], 0xbb, "xdp_update_frag buf[3510]");
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ASSERT_EQ(buf[3525], 0xbb, "xdp_update_frag buf[3525]");
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memset(buf, 0, 9000);
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offset = (__u32 *)buf;
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*offset = 7606;
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buf[*offset] = 0xaa; /* marker at offset 7606 (frag0) */
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buf[*offset + 15] = 0xaa; /* marker at offset 7621 (frag1) */
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err = bpf_prog_test_run_opts(prog_fd, &topts);
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/* test_xdp_update_frags: buf[7606,7621]: 0xaa -> 0xbb */
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ASSERT_OK(err, "xdp_update_frag");
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ASSERT_EQ(topts.retval, XDP_PASS, "xdp_update_frag retval");
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ASSERT_EQ(buf[7606], 0xbb, "xdp_update_frag buf[7606]");
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ASSERT_EQ(buf[7621], 0xbb, "xdp_update_frag buf[7621]");
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free(buf);
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/* test_xdp_update_frags: unsupported buffer size */
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f = fopen("/proc/sys/net/core/max_skb_frags", "r");
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if (!ASSERT_OK_PTR(f, "max_skb_frag file pointer"))
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goto out;
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num = fscanf(f, "%d", &max_skb_frags);
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fclose(f);
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if (!ASSERT_EQ(num, 1, "max_skb_frags read failed"))
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goto out;
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/* xdp_buff linear area size is always set to 4096 in the
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* bpf_prog_test_run_xdp routine.
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*/
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buf_size = 4096 + (max_skb_frags + 1) * sysconf(_SC_PAGE_SIZE);
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buf = malloc(buf_size);
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if (!ASSERT_OK_PTR(buf, "alloc buf"))
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goto out;
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memset(buf, 0, buf_size);
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offset = (__u32 *)buf;
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*offset = 16;
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buf[*offset] = 0xaa;
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buf[*offset + 15] = 0xaa;
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topts.data_in = buf;
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topts.data_out = buf;
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topts.data_size_in = buf_size;
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topts.data_size_out = buf_size;
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err = bpf_prog_test_run_opts(prog_fd, &topts);
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ASSERT_EQ(err, -ENOMEM,
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"unsupported buf size, possible non-default /proc/sys/net/core/max_skb_flags?");
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free(buf);
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out:
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bpf_object__close(obj);
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}
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void test_xdp_adjust_frags(void)
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{
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if (test__start_subtest("xdp_adjust_frags"))
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test_xdp_update_frags();
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}
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