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Date: Mon, 11 Jan 2021 16:17:56 +0800
From: Tiezhu Yang <yangtiezhu@...ngson.cn>
To: Alexei Starovoitov <ast@...nel.org>,
Daniel Borkmann <daniel@...earbox.net>,
Andrii Nakryiko <andrii@...nel.org>,
Martin KaFai Lau <kafai@...com>,
Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
John Fastabend <john.fastabend@...il.com>,
KP Singh <kpsingh@...nel.org>
Cc: netdev@...r.kernel.org, bpf@...r.kernel.org,
Xuefeng Li <lixuefeng@...ngson.cn>
Subject: [QUESTION] build errors and warnings when make M=samples/bpf
Hi all,
I found the following build errors and warnings when make M=samples/bpf
on the Loongson 3A3000 platform which belongs to MIPS arch.
Are theseknown issues? Should I submit patches to fix them? (1) fatal error:
'asm/rwonce.h' file not found
CLANG-bpf samples/bpf/xdpsock_kern.o In file included from
samples/bpf/xdpsock_kern.c:2: In file included from
./include/linux/bpf.h:9: In file included from
./include/linux/workqueue.h:9: In file included from
./include/linux/timer.h:5: In file included from
./include/linux/list.h:9: In file included from
./include/linux/kernel.h:10: ./include/linux/compiler.h:246:10: fatal
error: 'asm/rwonce.h' file not found #include <asm/rwonce.h>
^~~~~~~~~~~~~~ 1 error generated. HEAD is now at 7c53f6b... Linux
5.11-rc3 [yangtiezhu@...ux linux.git]$ find . -name rwonce.h
./include/asm-generic/rwonce.h ./arch/arm64/include/asm/rwonce.h
./arch/alpha/include/asm/rwonce.h The following changes can fix the
above errors, is it right? [yangtiezhu@...ux linux.git]$ vim
include/linux/compiler.h [yangtiezhu@...ux linux.git]$ git diff diff
--git a/include/linux/compiler.h b/include/linux/compiler.h index
b8fe0c2..b73b18c 100644 --- a/include/linux/compiler.h +++
b/include/linux/compiler.h @@ -243,6 +243,8 @@ static inline void
*offset_to_ptr(const int *off) */ #define
prevent_tail_call_optimization() mb() +#ifdef CONFIG_ARM64 ||
CONFIG_ALPHA #include <asm/rwonce.h> +#endif #endif /*
__LINUX_COMPILER_H */ (2) printf format warnings
CC samples/bpf/ibumad_user.o
samples/bpf/ibumad_user.c: In function ‘dump_counts’:
samples/bpf/ibumad_user.c:46:24: warning: format ‘%llu’ expects argument of type ‘long long unsigned int’, but argument 3 has type ‘__u64’ {aka ‘long unsigned int’} [-Wformat=]
printf("0x%02x : %llu\n", key, value);
~~~^ ~~~~~
%lu
CC samples/bpf/lathist_user.o
CC samples/bpf/lwt_len_hist_user.o
CC samples/bpf/map_perf_test_user.o
CC samples/bpf/offwaketime_user.o
samples/bpf/offwaketime_user.c: In function ‘print_ksym’:
samples/bpf/offwaketime_user.c:34:17: warning: format ‘%llx’ expects argument of type ‘long long unsigned int’, but argument 3 has type ‘__u64’ {aka ‘long unsigned int’} [-Wformat=]
printf("%s/%llx;", sym->name, addr);
~~~^ ~~~~
%lx
samples/bpf/offwaketime_user.c: In function ‘print_stack’:
samples/bpf/offwaketime_user.c:68:17: warning: format ‘%lld’ expects argument of type ‘long long int’, but argument 3 has type ‘__u64’ {aka ‘long unsigned int’} [-Wformat=]
printf(";%s %lld\n", key->waker, count);
~~~^ ~~~~~
%ld
CC samples/bpf/sampleip_user.o
samples/bpf/sampleip_user.c: In function ‘print_ip_map’:
samples/bpf/sampleip_user.c:118:20: warning: format ‘%llx’ expects argument of type ‘long long unsigned int’, but argument 2 has type ‘__u64’ {aka ‘long unsigned int’} [-Wformat=]
printf("0x%-17llx %-32s %u\n", counts[i].ip, sym->name,
~~~~~~^ ~~~~~~~~~~~~
%-17lx
samples/bpf/sampleip_user.c:121:20: warning: format ‘%llx’ expects argument of type ‘long long unsigned int’, but argument 2 has type ‘__u64’ {aka ‘long unsigned int’} [-Wformat=]
printf("0x%-17llx %-32s %u\n", counts[i].ip, "(user)",
~~~~~~^ ~~~~~~~~~~~~
%-17lx
CC samples/bpf/sockex1_user.o
CC samples/bpf/sockex2_user.o
samples/bpf/sockex2_user.c: In function ‘main’:
samples/bpf/sockex2_user.c:47:27: warning: format ‘%lld’ expects argument of type ‘long long int’, but argument 3 has type ‘__u64’ {aka ‘long unsigned int’} [-Wformat=]
printf("ip %s bytes %lld packets %lld\n",
~~~^
%ld
samples/bpf/sockex2_user.c:49:11:
value.bytes, value.packets);
~~~~~~~~~~~
samples/bpf/sockex2_user.c:47:40: warning: format ‘%lld’ expects argument of type ‘long long int’, but argument 4 has type ‘__u64’ {aka ‘long unsigned int’} [-Wformat=]
printf("ip %s bytes %lld packets %lld\n",
~~~^
%ld
samples/bpf/sockex2_user.c:49:24:
value.bytes, value.packets);
~~~~~~~~~~~~~
CC samples/bpf/sockex3_user.o
samples/bpf/sockex3_user.c: In function ‘main’:
samples/bpf/sockex3_user.c:91:36: warning: format ‘%lld’ expects argument of type ‘long long int’, but argument 6 has type ‘__u64’ {aka ‘long unsigned int’} [-Wformat=]
printf("%s.%05d -> %s.%05d %12lld %12lld\n",
~~~~~^
%12ld
samples/bpf/sockex3_user.c:96:11:
value.bytes, value.packets);
~~~~~~~~~~~
samples/bpf/sockex3_user.c:91:43: warning: format ‘%lld’ expects argument of type ‘long long int’, but argument 7 has type ‘__u64’ {aka ‘long unsigned int’} [-Wformat=]
printf("%s.%05d -> %s.%05d %12lld %12lld\n",
~~~~~^
%12ld
samples/bpf/sockex3_user.c:96:24:
value.bytes, value.packets);
~~~~~~~~~~~~~
CC samples/bpf/spintest_user.o
CC samples/bpf/syscall_tp_user.o
CC samples/bpf/task_fd_query_user.o
samples/bpf/task_fd_query_user.c: In function ‘test_debug_fs_kprobe’:
samples/bpf/task_fd_query_user.c:116:52: warning: format ‘%llx’ expects argument of type ‘long long unsigned int’, but argument 4 has type ‘__u64’ {aka ‘long unsigned int’} [-Wformat=]
printf("buf: %s, fd_type: %u, probe_offset: 0x%llx,"
~~~^
%lx
samples/bpf/task_fd_query_user.c:118:24:
buf, fd_type, probe_offset, probe_addr);
~~~~~~~~~~~~
samples/bpf/task_fd_query_user.c:116:10: warning: format ‘%llx’ expects argument of type ‘long long unsigned int’, but argument 5 has type ‘__u64’ {aka ‘long unsigned int’} [-Wformat=]
printf("buf: %s, fd_type: %u, probe_offset: 0x%llx,"
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
samples/bpf/task_fd_query_user.c:118:38:
buf, fd_type, probe_offset, probe_addr);
~~~~~~~~~~
samples/bpf/task_fd_query_user.c:117:29: note: format string is defined here
" probe_addr: 0x%llx\n",
~~~^
%lx
samples/bpf/task_fd_query_user.c: In function ‘test_nondebug_fs_probe’:
samples/bpf/task_fd_query_user.c:190:10: warning: format ‘%llx’ expects argument of type ‘long long unsigned int’, but argument 4 has type ‘__u64’ {aka ‘long unsigned int’} [-Wformat=]
printf("FAIL: %s, "
^~~~~~~~~~~~
samples/bpf/task_fd_query_user.c:192:38:
__func__, name ? name : "", offset, addr, is_return);
~~~~~~
samples/bpf/task_fd_query_user.c:191:36: note: format string is defined here
"for name %s, offset 0x%llx, addr 0x%llx, is_return %d\n",
~~~^
%lx
samples/bpf/task_fd_query_user.c:190:10: warning: format ‘%llx’ expects argument of type ‘long long unsigned int’, but argument 5 has type ‘__u64’ {aka ‘long unsigned int’} [-Wformat=]
printf("FAIL: %s, "
^~~~~~~~~~~~
samples/bpf/task_fd_query_user.c:192:46:
__func__, name ? name : "", offset, addr, is_return);
~~~~
samples/bpf/task_fd_query_user.c:191:49: note: format string is defined here
"for name %s, offset 0x%llx, addr 0x%llx, is_return %d\n",
~~~^
%lx
samples/bpf/task_fd_query_user.c:208:50: warning: format ‘%llx’ expects argument of type ‘long long unsigned int’, but argument 3 has type ‘__u64’ {aka ‘long unsigned int’} [-Wformat=]
printf("FAIL: %s, incorrect probe_offset 0x%llx\n",
~~~^
%lx
__func__, probe_offset);
~~~~~~~~~~~~
samples/bpf/task_fd_query_user.c:220:48: warning: format ‘%llx’ expects argument of type ‘long long unsigned int’, but argument 3 has type ‘__u64’ {aka ‘long unsigned int’} [-Wformat=]
printf("FAIL: %s, incorrect probe_addr 0x%llx\n",
~~~^
%lx
__func__, probe_addr);
~~~~~~~~~~
samples/bpf/task_fd_query_user.c: In function ‘test_debug_fs_uprobe’:
samples/bpf/task_fd_query_user.c:300:49: warning: format ‘%llx’ expects argument of type ‘long long unsigned int’, but argument 3 has type ‘__u64’ {aka ‘long unsigned int’} [-Wformat=]
printf("FAIL: %s, incorrect probe_offset 0x%llx\n", __func__,
~~~^
%lx
probe_offset);
~~~~~~~~~~~~
CC samples/bpf/tc_l2_redirect_user.o
CC samples/bpf/test_cgrp2_array_pin.o
CC samples/bpf/test_cgrp2_attach.o
CC samples/bpf/test_cgrp2_sock.o
CC samples/bpf/test_cgrp2_sock2.o
CC samples/bpf/test_current_task_under_cgroup_user.o
CC samples/bpf/test_map_in_map_user.o
CC samples/bpf/test_overhead_user.o
CC samples/bpf/test_probe_write_user_user.o
CC samples/bpf/trace_event_user.o
samples/bpf/trace_event_user.c: In function ‘print_addr’:
samples/bpf/trace_event_user.c:50:13: warning: format ‘%llx’ expects argument of type ‘long long unsigned int’, but argument 2 has type ‘__u64’ {aka ‘long unsigned int’} [-Wformat=]
printf("%llx;", addr);
~~~^ ~~~~
%lx
samples/bpf/trace_event_user.c: In function ‘print_stack’:
samples/bpf/trace_event_user.c:67:14: warning: format ‘%lld’ expects argument of type ‘long long int’, but argument 2 has type ‘__u64’ {aka ‘long unsigned int’} [-Wformat=]
printf("%3lld %s;", count, key->comm);
~~~~^ ~~~~~
%3ld
CC samples/bpf/trace_output_user.o
samples/bpf/trace_output_user.c: In function ‘print_bpf_output’:
samples/bpf/trace_output_user.c:30:22: warning: format ‘%llx’ expects argument of type ‘long long unsigned int’, but argument 2 has type ‘__u64’ {aka ‘long unsigned int’} [-Wformat=]
printf("BUG pid %llx cookie %llx sized %d\n",
~~~^
%lx
e->pid, e->cookie, size);
~~~~~~
samples/bpf/trace_output_user.c:30:34: warning: format ‘%llx’ expects argument of type ‘long long unsigned int’, but argument 3 has type ‘__u64’ {aka ‘long unsigned int’} [-Wformat=]
printf("BUG pid %llx cookie %llx sized %d\n",
~~~^
%lx
e->pid, e->cookie, size);
~~~~~~~~~
CC samples/bpf/tracex1_user.o
CC samples/bpf/tracex2_user.o
CC samples/bpf/tracex3_user.o
samples/bpf/tracex3_user.c: In function ‘print_hist’:
samples/bpf/tracex3_user.c:105:16: warning: format ‘%lld’ expects argument of type ‘long long int’, but argument 2 has type ‘__u64’ {aka ‘long unsigned int’} [-Wformat=]
printf(" # %lld\n", total_events);
~~~^ ~~~~~~~~~~~~
%ld
CC samples/bpf/tracex4_user.o
samples/bpf/tracex4_user.c: In function ‘print_old_objects’:
samples/bpf/tracex4_user.c:44:20: warning: format ‘%llx’ expects argument of type ‘long long unsigned int’, but argument 2 has type ‘__u64’ {aka ‘long unsigned int’} [-Wformat=]
printf("obj 0x%llx is %2lldsec old was allocated at ip %llx\n",
~~~^
%lx
next_key, (val - v.val) / 1000000000ll, v.ip);
~~~~~~~~
samples/bpf/tracex4_user.c:44:61: warning: format ‘%llx’ expects argument of type ‘long long unsigned int’, but argument 4 has type ‘__u64’ {aka ‘long unsigned int’} [-Wformat=]
printf("obj 0x%llx is %2lldsec old was allocated at ip %llx\n",
~~~^
%lx
next_key, (val - v.val) / 1000000000ll, v.ip);
~~~~
CC samples/bpf/tracex5_user.o
CC samples/bpf/tracex6_user.o
samples/bpf/tracex6_user.c: In function ‘check_on_cpu’:
samples/bpf/tracex6_user.c:54:31: warning: format ‘%llu’ expects argument of type ‘long long unsigned int’, but argument 4 has type ‘__u64’ {aka ‘long unsigned int’} [-Wformat=]
fprintf(stderr, "CPU %d: %llu\n", cpu, value);
~~~^ ~~~~~
%lu
samples/bpf/tracex6_user.c:62:40: warning: format ‘%llu’ expects argument of type ‘long long unsigned int’, but argument 4 has type ‘__u64’ {aka ‘long unsigned int’} [-Wformat=]
fprintf(stderr, "CPU %d: counter: %llu, enabled: %llu, running: %llu\n", cpu,
~~~^
%lu
value2.counter, value2.enabled, value2.running);
~~~~~~~~~~~~~~
samples/bpf/tracex6_user.c:62:55: warning: format ‘%llu’ expects argument of type ‘long long unsigned int’, but argument 5 has type ‘__u64’ {aka ‘long unsigned int’} [-Wformat=]
fprintf(stderr, "CPU %d: counter: %llu, enabled: %llu, running: %llu\n", cpu,
~~~^
%lu
value2.counter, value2.enabled, value2.running);
~~~~~~~~~~~~~~
samples/bpf/tracex6_user.c:62:70: warning: format ‘%llu’ expects argument of type ‘long long unsigned int’, but argument 6 has type ‘__u64’ {aka ‘long unsigned int’} [-Wformat=]
fprintf(stderr, "CPU %d: counter: %llu, enabled: %llu, running: %llu\n", cpu,
~~~^
%lu
value2.counter, value2.enabled, value2.running);
~~~~~~~~~~~~~~
CC samples/bpf/tracex7_user.o
CC samples/bpf/xdp1_user.o
samples/bpf/xdp1_user.c: In function ‘poll_stats’:
samples/bpf/xdp1_user.c:62:28: warning: format ‘%llu’ expects argument of type ‘long long unsigned int’, but argument 3 has type ‘__u64’ {aka ‘long unsigned int’} [-Wformat=]
printf("proto %u: %10llu pkt/s\n",
~~~~~^
%10lu
key, (sum - prev[key]) / interval);
~~~~~~~~~~~~~~~~~~~~~~~~~~~~
CC samples/bpf/xdp_adjust_tail_user.o
samples/bpf/xdp_adjust_tail_user.c: In function ‘poll_stats’:
samples/bpf/xdp_adjust_tail_user.c:65:46: warning: format ‘%llu’ expects argument of type ‘long long unsigned int’, but argument 2 has type ‘__u64’ {aka ‘long unsigned int’} [-Wformat=]
printf("icmp \"packet too big\" sent: %10llu pkts\n", value);
~~~~~^ ~~~~~
%10lu
CC samples/bpf/xdp_fwd_user.o
CC samples/bpf/xdp_monitor_user.o
CC samples/bpf/xdp_redirect_cpu_user.o
CC samples/bpf/xdp_redirect_map_user.o
samples/bpf/xdp_redirect_map_user.c: In function ‘poll_stats’:
samples/bpf/xdp_redirect_map_user.c:80:29: warning: format ‘%llu’ expects argument of type ‘long long unsigned int’, but argument 3 has type ‘__u64’ {aka ‘long unsigned int’} [-Wformat=]
printf("ifindex %i: %10llu pkt/s\n",
~~~~~^
%10lu
ifindex, sum / interval);
~~~~~~~~~~~~~~
CC samples/bpf/xdp_redirect_user.o
samples/bpf/xdp_redirect_user.c: In function ‘poll_stats’:
samples/bpf/xdp_redirect_user.c:80:29: warning: format ‘%llu’ expects argument of type ‘long long unsigned int’, but argument 3 has type ‘__u64’ {aka ‘long unsigned int’} [-Wformat=]
printf("ifindex %i: %10llu pkt/s\n",
~~~~~^
%10lu
ifindex, sum / interval);
~~~~~~~~~~~~~~
CC samples/bpf/xdp_router_ipv4_user.o
samples/bpf/xdp_router_ipv4_user.c: In function ‘read_arp’:
samples/bpf/xdp_router_ipv4_user.c:409:22: warning: format ‘%lld’ expects argument of type ‘long long int’, but argument 3 has type ‘__be64’ {aka ‘long unsigned int’} [-Wformat=]
sprintf(mac, "%lld",
~~~^
%ld
*((__be64 *)RTA_DATA(rt_attr)));
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
samples/bpf/xdp_router_ipv4_user.c:418:20: warning: format ‘%llx’ expects argument of type ‘long long unsigned int’, but argument 3 has type ‘__be64’ {aka ‘long unsigned int’} [-Wformat=]
printf("%x\t\t%llx\n", arp_entry.dst, arp_entry.mac);
~~~^ ~~~~~~~~~~~~~
%lx
samples/bpf/xdp_router_ipv4_user.c: In function ‘monitor_route’:
samples/bpf/xdp_router_ipv4_user.c:579:28: warning: format ‘%llu’ expects argument of type ‘long long unsigned int’, but argument 3 has type ‘__u64’ {aka ‘long unsigned int’} [-Wformat=]
printf("proto %u: %10llu pkt/s\n",
~~~~~^
%10lu
key, sum / interval);
~~~~~~~~~~~~~~
CC samples/bpf/xdp_rxq_info_user.o
CC samples/bpf/xdp_sample_pkts_user.o
CC samples/bpf/xdp_tx_iptunnel_user.o
samples/bpf/xdp_tx_iptunnel_user.c: In function ‘poll_stats’:
samples/bpf/xdp_tx_iptunnel_user.c:74:32: warning: format ‘%llu’ expects argument of type ‘long long unsigned int’, but argument 3 has type ‘__u64’ {aka ‘long unsigned int’} [-Wformat=]
printf("proto %u: sum:%10llu pkts, rate:%10llu pkts/s\n",
~~~~~^
%10lu
proto, sum, sum / STATS_INTERVAL_S);
~~~
samples/bpf/xdp_tx_iptunnel_user.c:74:50: warning: format ‘%llu’ expects argument of type ‘long long unsigned int’, but argument 4 has type ‘__u64’ {aka ‘long unsigned int’} [-Wformat=]
printf("proto %u: sum:%10llu pkts, rate:%10llu pkts/s\n",
~~~~~^
%10lu
CC samples/bpf/xdpsock_ctrl_proc.o
CC samples/bpf/xdpsock_user.o
samples/bpf/xdpsock_user.c: In function ‘hex_dump’:
samples/bpf/xdpsock_user.c:542:24: warning: format ‘%llu’ expects argument of type ‘long long unsigned int’, but argument 3 has type ‘u64’ {aka ‘long unsigned int’} [-Wformat=]
sprintf(buf, "addr=%llu", addr);
~~~^ ~~~~
%lu
CC samples/bpf/xsk_fwd.o
samples/bpf/xsk_fwd.c: In function ‘print_port_stats’:
samples/bpf/xsk_fwd.c:939:23: warning: format ‘%llu’ expects argument of type ‘long long unsigned int’, but argument 3 has type ‘u64’ {aka ‘long unsigned int’} [-Wformat=]
printf("| %4d | %12llu | %13.0f | %12llu | %13.0f |\n",
~~~~~^
%12lu
samples/bpf/xsk_fwd.c:941:9:
p->n_pkts_rx,
~~~~~~~~~~~~
samples/bpf/xsk_fwd.c:939:41: warning: format ‘%llu’ expects argument of type ‘long long unsigned int’, but argument 5 has type ‘u64’ {aka ‘long unsigned int’} [-Wformat=]
printf("| %4d | %12llu | %13.0f | %12llu | %13.0f |\n",
~~~~~^
%12lu
samples/bpf/xsk_fwd.c:943:9:
p->n_pkts_tx,
~~~~~~~~~~~~
Thanks,
Tiezhu
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