109 lines
2.9 KiB
C
109 lines
2.9 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (c) 2025 Meta Platforms, Inc. and affiliates. */
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#include <test_progs.h>
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#include <sys/mman.h>
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#include "stream.skel.h"
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#include "stream_fail.skel.h"
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void test_stream_failure(void)
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{
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RUN_TESTS(stream_fail);
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}
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void test_stream_success(void)
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{
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RUN_TESTS(stream);
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return;
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}
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void test_stream_syscall(void)
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{
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LIBBPF_OPTS(bpf_test_run_opts, opts);
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LIBBPF_OPTS(bpf_prog_stream_read_opts, ropts);
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struct stream *skel;
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int ret, prog_fd;
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char buf[64];
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skel = stream__open_and_load();
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if (!ASSERT_OK_PTR(skel, "stream__open_and_load"))
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return;
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prog_fd = bpf_program__fd(skel->progs.stream_syscall);
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ret = bpf_prog_test_run_opts(prog_fd, &opts);
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ASSERT_OK(ret, "ret");
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ASSERT_OK(opts.retval, "retval");
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ASSERT_LT(bpf_prog_stream_read(0, BPF_STREAM_STDOUT, buf, sizeof(buf), &ropts), 0, "error");
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ret = -errno;
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ASSERT_EQ(ret, -EINVAL, "bad prog_fd");
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ASSERT_LT(bpf_prog_stream_read(prog_fd, 0, buf, sizeof(buf), &ropts), 0, "error");
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ret = -errno;
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ASSERT_EQ(ret, -ENOENT, "bad stream id");
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ASSERT_LT(bpf_prog_stream_read(prog_fd, BPF_STREAM_STDOUT, NULL, sizeof(buf), NULL), 0, "error");
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ret = -errno;
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ASSERT_EQ(ret, -EFAULT, "bad stream buf");
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ret = bpf_prog_stream_read(prog_fd, BPF_STREAM_STDOUT, buf, 2, NULL);
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ASSERT_EQ(ret, 2, "bytes");
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ret = bpf_prog_stream_read(prog_fd, BPF_STREAM_STDOUT, buf, 2, NULL);
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ASSERT_EQ(ret, 1, "bytes");
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ret = bpf_prog_stream_read(prog_fd, BPF_STREAM_STDOUT, buf, 1, &ropts);
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ASSERT_EQ(ret, 0, "no bytes stdout");
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ret = bpf_prog_stream_read(prog_fd, BPF_STREAM_STDERR, buf, 1, &ropts);
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ASSERT_EQ(ret, 0, "no bytes stderr");
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stream__destroy(skel);
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}
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static void test_address(struct bpf_program *prog, unsigned long *fault_addr_p)
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{
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LIBBPF_OPTS(bpf_test_run_opts, opts);
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LIBBPF_OPTS(bpf_prog_stream_read_opts, ropts);
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int ret, prog_fd;
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char fault_addr[64];
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char buf[1024];
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prog_fd = bpf_program__fd(prog);
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ret = bpf_prog_test_run_opts(prog_fd, &opts);
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ASSERT_OK(ret, "ret");
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ASSERT_OK(opts.retval, "retval");
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sprintf(fault_addr, "0x%lx", *fault_addr_p);
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ret = bpf_prog_stream_read(prog_fd, BPF_STREAM_STDERR, buf, sizeof(buf), &ropts);
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ASSERT_GT(ret, 0, "stream read");
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ASSERT_LE(ret, 1023, "len for buf");
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buf[ret] = '\0';
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if (!ASSERT_HAS_SUBSTR(buf, fault_addr, "fault_addr")) {
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fprintf(stderr, "Output from stream:\n%s\n", buf);
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fprintf(stderr, "Fault Addr: %s\n", fault_addr);
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}
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}
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void test_stream_arena_fault_address(void)
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{
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struct stream *skel;
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#if !defined(__x86_64__) && !defined(__aarch64__)
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printf("%s:SKIP: arena fault reporting not supported\n", __func__);
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test__skip();
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return;
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#endif
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skel = stream__open_and_load();
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if (!ASSERT_OK_PTR(skel, "stream__open_and_load"))
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return;
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if (test__start_subtest("read_fault"))
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test_address(skel->progs.stream_arena_read_fault, &skel->bss->fault_addr);
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if (test__start_subtest("write_fault"))
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test_address(skel->progs.stream_arena_write_fault, &skel->bss->fault_addr);
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stream__destroy(skel);
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}
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