forked from luck/tmp_suning_uos_patched
perf trace beauty: Add BPF augmenter for the 'rename' syscall
I.e. two strings: # perf trace -e rename systemd/1 rename("/run/systemd/units/.#invocation:dnf-makecache.service970761b7f2840dcc", "/run/systemd/units/invocation:dnf-makecache.service") = 0 systemd-journa/715 rename("/run/systemd/journal/streams/.#9:17539785BJDblc", "/run/systemd/journal/streams/9:17539785") = 0 mv/1936 rename("/tmp/build/perf/fd/.array.o.tmp", "/tmp/build/perf/fd/.array.o.cmd") = 0 sh/1949 rename("/tmp/build/perf/.cpu.o.tmp", "/tmp/build/perf/.cpu.o.cmd") = 0 mv/1954 rename("/tmp/build/perf/fs/.tracing_path.o.tmp", "/tmp/build/perf/fs/.tracing_path.o.cmd") = 0 mv/1963 rename("/tmp/build/perf/common-cmds.h+", "/tmp/build/perf/common-cmds.h") = 0 :1975/1975 rename("/tmp/build/perf/.exec-cmd.o.tmp", "/tmp/build/perf/.exec-cmd.o.cmd") = 0 mv/1979 rename("/tmp/build/perf/fs/.fs.o.tmp", "/tmp/build/perf/fs/.fs.o.cmd") = 0 mv/2005 rename("/tmp/build/perf/.debug.o.tmp", "/tmp/build/perf/.debug.o.cmd") = 0 mv/2012 rename("/tmp/build/perf/.str_error_r.o.tmp", "/tmp/build/perf/.str_error_r.o.cmd") = 0 mv/2019 rename("/tmp/build/perf/.help.o.tmp", "/tmp/build/perf/.help.o.cmd") = 0 mv/2031 rename("/tmp/build/perf/.trace-seq.o.tmp", "/tmp/build/perf/.trace-seq.o.cmd") = 0 make/2038 ... [continued]: rename()) = 0 :2038/2038 rename("/tmp/build/perf/.event-plugin.o.tmp", "/tmp/build/perf/.event-plugin.o.cmd") ... ar/2035 rename("/tmp/build/perf/stzwBX3a", "/tmp/build/perf/libapi.a") = 0 mv/2051 rename("/tmp/build/perf/.parse-utils.o.tmp", "/tmp/build/perf/.parse-utils.o.cmd") = 0 mv/2069 rename("/tmp/build/perf/.subcmd-config.o.tmp", "/tmp/build/perf/.subcmd-config.o.cmd") = 0 make/2080 rename("/tmp/build/perf/.parse-filter.o.tmp", "/tmp/build/perf/.parse-filter.o.cmd") = 0 mv/2099 rename("/tmp/build/perf/.pager.o.tmp", "/tmp/build/perf/.pager.o.cmd") = 0 :2124/2124 rename("/tmp/build/perf/.sigchain.o.tmp", "/tmp/build/perf/.sigchain.o.cmd") = 0 make/2140 rename("/tmp/build/perf/.event-parse.o.tmp", "/tmp/build/perf/.event-parse.o.cmd") = 0 mv/2164 rename("/tmp/build/perf/.kbuffer-parse.o.tmp", "/tmp/build/perf/.kbuffer-parse.o.cmd") = 0 sh/2174 rename("/tmp/build/perf/.run-command.o.tmp", "/tmp/build/perf/.run-command.o.cmd") = 0 mv/2190 rename("/tmp/build/perf/.tep_strerror.o.tmp", "/tmp/build/perf/.tep_strerror.o.cmd") = 0 :2261/2261 rename("/tmp/build/perf/.event-parse-api.o.tmp", "/tmp/build/perf/.event-parse-api.o.cmd") = 0 :2480/2480 rename("/tmp/build/perf/stLv3kG2", "/tmp/build/perf/libtraceevent.a") = 0 ^C# Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Link: https://lkml.kernel.org/n/tip-6hh2rl27uri6gsxhmk6q3hx5@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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@ -197,6 +197,25 @@ int sys_enter_openat(struct syscall_enter_args *args)
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return perf_event_output(args, &__augmented_syscalls__, BPF_F_CURRENT_CPU, augmented_args, len);
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return perf_event_output(args, &__augmented_syscalls__, BPF_F_CURRENT_CPU, augmented_args, len);
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}
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}
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SEC("!syscalls:sys_enter_rename")
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int sys_enter_rename(struct syscall_enter_args *args)
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{
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int key = 0;
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struct augmented_args_payload *augmented_args = bpf_map_lookup_elem(&augmented_args_tmp, &key);
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const void *oldpath_arg = (const void *)args->args[0],
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*newpath_arg = (const void *)args->args[1];
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unsigned int len = sizeof(augmented_args->args), oldpath_len;
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if (augmented_args == NULL)
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return 1; /* Failure: don't filter */
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oldpath_len = augmented_filename__read(&augmented_args->filename, oldpath_arg, sizeof(augmented_args->filename.value));
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len += oldpath_len + augmented_filename__read((void *)(&augmented_args->filename) + oldpath_len, newpath_arg, sizeof(augmented_args->filename.value));
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/* If perf_event_output fails, return non-zero so that it gets recorded unaugmented */
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return perf_event_output(args, &__augmented_syscalls__, BPF_F_CURRENT_CPU, augmented_args, len);
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}
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SEC("!syscalls:sys_enter_renameat")
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SEC("!syscalls:sys_enter_renameat")
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int sys_enter_renameat(struct syscall_enter_args *args)
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int sys_enter_renameat(struct syscall_enter_args *args)
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{
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{
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