{ .name = "recvmsg",
.arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, },
{ .name = "renameat",
+ .bpf_prog_name = { .sys_enter = "!syscalls:sys_enter_renameat", },
.arg = { [0] = { .scnprintf = SCA_FDAT, /* olddirfd */ },
[2] = { .scnprintf = SCA_FDAT, /* newdirfd */ }, }, },
{ .name = "renameat2",
+ .bpf_prog_name = { .sys_enter = "!syscalls:sys_enter_renameat", },
.arg = { [0] = { .scnprintf = SCA_FDAT, /* olddirfd */ },
[2] = { .scnprintf = SCA_FDAT, /* newdirfd */ },
[4] = { .scnprintf = SCA_RENAMEAT2_FLAGS, /* flags */ }, }, },
struct augmented_args_filename {
struct syscall_enter_args args;
struct augmented_filename filename;
+ struct augmented_filename filename2;
};
bpf_map(augmented_filename_map, PERCPU_ARRAY, int, struct augmented_args_filename, 1);
return perf_event_output(args, &__augmented_syscalls__, BPF_F_CURRENT_CPU, augmented_args, len);
}
+SEC("!syscalls:sys_enter_renameat")
+int sys_enter_renameat(struct syscall_enter_args *args)
+{
+ int key = 0;
+ struct augmented_args_filename *augmented_args = bpf_map_lookup_elem(&augmented_filename_map, &key);
+ const void *oldpath_arg = (const void *)args->args[1],
+ *newpath_arg = (const void *)args->args[3];
+ unsigned int len = sizeof(augmented_args->args), oldpath_len;
+
+ if (augmented_args == NULL)
+ return 1; /* Failure: don't filter */
+
+ oldpath_len = augmented_filename__read(&augmented_args->filename, oldpath_arg, sizeof(augmented_args->filename.value));
+ len += oldpath_len + augmented_filename__read((void *)(&augmented_args->filename) + oldpath_len, newpath_arg, sizeof(augmented_args->filename.value));
+
+ /* If perf_event_output fails, return non-zero so that it gets recorded unaugmented */
+ return perf_event_output(args, &__augmented_syscalls__, BPF_F_CURRENT_CPU, augmented_args, len);
+}
+
SEC("raw_syscalls:sys_enter")
int sys_enter(struct syscall_enter_args *args)
{