76 lines
2.4 KiB
C
76 lines
2.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <test_progs.h>
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void test_task_fd_query_rawtp(void)
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{
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const char *file = "./test_get_stack_rawtp.o";
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__u64 probe_offset, probe_addr;
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__u32 len, prog_id, fd_type;
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struct bpf_object *obj;
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int efd, err, prog_fd;
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__u32 duration = 0;
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char buf[256];
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err = bpf_prog_test_load(file, BPF_PROG_TYPE_RAW_TRACEPOINT, &obj, &prog_fd);
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if (CHECK(err, "prog_load raw tp", "err %d errno %d\n", err, errno))
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return;
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efd = bpf_raw_tracepoint_open("sys_enter", prog_fd);
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if (CHECK(efd < 0, "raw_tp_open", "err %d errno %d\n", efd, errno))
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goto close_prog;
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/* query (getpid(), efd) */
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len = sizeof(buf);
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err = bpf_task_fd_query(getpid(), efd, 0, buf, &len, &prog_id,
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&fd_type, &probe_offset, &probe_addr);
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if (CHECK(err < 0, "bpf_task_fd_query", "err %d errno %d\n", err,
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errno))
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goto close_prog;
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err = fd_type == BPF_FD_TYPE_RAW_TRACEPOINT &&
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strcmp(buf, "sys_enter") == 0;
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if (CHECK(!err, "check_results", "fd_type %d tp_name %s\n",
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fd_type, buf))
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goto close_prog;
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/* test zero len */
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len = 0;
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err = bpf_task_fd_query(getpid(), efd, 0, buf, &len, &prog_id,
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&fd_type, &probe_offset, &probe_addr);
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if (CHECK(err < 0, "bpf_task_fd_query (len = 0)", "err %d errno %d\n",
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err, errno))
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goto close_prog;
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err = fd_type == BPF_FD_TYPE_RAW_TRACEPOINT &&
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len == strlen("sys_enter");
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if (CHECK(!err, "check_results", "fd_type %d len %u\n", fd_type, len))
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goto close_prog;
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/* test empty buffer */
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len = sizeof(buf);
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err = bpf_task_fd_query(getpid(), efd, 0, 0, &len, &prog_id,
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&fd_type, &probe_offset, &probe_addr);
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if (CHECK(err < 0, "bpf_task_fd_query (buf = 0)", "err %d errno %d\n",
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err, errno))
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goto close_prog;
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err = fd_type == BPF_FD_TYPE_RAW_TRACEPOINT &&
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len == strlen("sys_enter");
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if (CHECK(!err, "check_results", "fd_type %d len %u\n", fd_type, len))
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goto close_prog;
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/* test smaller buffer */
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len = 3;
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err = bpf_task_fd_query(getpid(), efd, 0, buf, &len, &prog_id,
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&fd_type, &probe_offset, &probe_addr);
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if (CHECK(err >= 0 || errno != ENOSPC, "bpf_task_fd_query (len = 3)",
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"err %d errno %d\n", err, errno))
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goto close_prog;
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err = fd_type == BPF_FD_TYPE_RAW_TRACEPOINT &&
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len == strlen("sys_enter") &&
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strcmp(buf, "sy") == 0;
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if (CHECK(!err, "check_results", "fd_type %d len %u\n", fd_type, len))
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goto close_prog;
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close_prog:
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bpf_object__close(obj);
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}
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