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Date: Tue, 24 Dec 2019 15:16:20 +0800
From: kbuild test robot <lkp@...el.com>
To: Martin KaFai Lau <kafai@...com>
Cc: kbuild-all@...ts.01.org, bpf@...r.kernel.org,
Alexei Starovoitov <ast@...nel.org>,
Daniel Borkmann <daniel@...earbox.net>,
David Miller <davem@...emloft.net>, kernel-team@...com,
netdev@...r.kernel.org
Subject: Re: [PATCH bpf-next v2 07/11] bpf: tcp: Support tcp_congestion_ops
in bpf
Hi Martin,
I love your patch! Perhaps something to improve:
[auto build test WARNING on bpf-next/master]
[cannot apply to bpf/master net/master v5.5-rc3 next-20191220]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]
url: https://github.com/0day-ci/linux/commits/Martin-KaFai-Lau/Introduce-BPF-STRUCT_OPS/20191224-085617
base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master
config: s390-debug_defconfig (attached as .config)
compiler: s390-linux-gcc (GCC) 7.5.0
reproduce:
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# save the attached .config to linux build tree
GCC_VERSION=7.5.0 make.cross ARCH=s390
If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@...el.com>
All warnings (new ones prefixed by >>):
kernel/bpf/bpf_struct_ops.c: In function 'bpf_struct_ops_init':
>> kernel/bpf/bpf_struct_ops.c:198:1: warning: the frame size of 1208 bytes is larger than 1024 bytes [-Wframe-larger-than=]
}
^
vim +198 kernel/bpf/bpf_struct_ops.c
d69ac27055a81d Martin KaFai Lau 2019-12-20 113
d69ac27055a81d Martin KaFai Lau 2019-12-20 114 module_id = btf_find_by_name_kind(_btf_vmlinux, "module",
d69ac27055a81d Martin KaFai Lau 2019-12-20 115 BTF_KIND_STRUCT);
d69ac27055a81d Martin KaFai Lau 2019-12-20 116 if (module_id < 0) {
d69ac27055a81d Martin KaFai Lau 2019-12-20 117 pr_warn("Cannot find struct module in btf_vmlinux\n");
d69ac27055a81d Martin KaFai Lau 2019-12-20 118 return;
d69ac27055a81d Martin KaFai Lau 2019-12-20 119 }
d69ac27055a81d Martin KaFai Lau 2019-12-20 120 module_type = btf_type_by_id(_btf_vmlinux, module_id);
d69ac27055a81d Martin KaFai Lau 2019-12-20 121
b14e6918483a61 Martin KaFai Lau 2019-12-20 122 for (i = 0; i < ARRAY_SIZE(bpf_struct_ops); i++) {
b14e6918483a61 Martin KaFai Lau 2019-12-20 123 st_ops = bpf_struct_ops[i];
b14e6918483a61 Martin KaFai Lau 2019-12-20 124
d69ac27055a81d Martin KaFai Lau 2019-12-20 125 if (strlen(st_ops->name) + VALUE_PREFIX_LEN >=
d69ac27055a81d Martin KaFai Lau 2019-12-20 126 sizeof(value_name)) {
d69ac27055a81d Martin KaFai Lau 2019-12-20 127 pr_warn("struct_ops name %s is too long\n",
d69ac27055a81d Martin KaFai Lau 2019-12-20 128 st_ops->name);
d69ac27055a81d Martin KaFai Lau 2019-12-20 129 continue;
d69ac27055a81d Martin KaFai Lau 2019-12-20 130 }
d69ac27055a81d Martin KaFai Lau 2019-12-20 131 sprintf(value_name, "%s%s", VALUE_PREFIX, st_ops->name);
d69ac27055a81d Martin KaFai Lau 2019-12-20 132
d69ac27055a81d Martin KaFai Lau 2019-12-20 133 value_id = btf_find_by_name_kind(_btf_vmlinux, value_name,
d69ac27055a81d Martin KaFai Lau 2019-12-20 134 BTF_KIND_STRUCT);
d69ac27055a81d Martin KaFai Lau 2019-12-20 135 if (value_id < 0) {
d69ac27055a81d Martin KaFai Lau 2019-12-20 136 pr_warn("Cannot find struct %s in btf_vmlinux\n",
d69ac27055a81d Martin KaFai Lau 2019-12-20 137 value_name);
d69ac27055a81d Martin KaFai Lau 2019-12-20 138 continue;
d69ac27055a81d Martin KaFai Lau 2019-12-20 139 }
d69ac27055a81d Martin KaFai Lau 2019-12-20 140
b14e6918483a61 Martin KaFai Lau 2019-12-20 141 type_id = btf_find_by_name_kind(_btf_vmlinux, st_ops->name,
b14e6918483a61 Martin KaFai Lau 2019-12-20 142 BTF_KIND_STRUCT);
b14e6918483a61 Martin KaFai Lau 2019-12-20 143 if (type_id < 0) {
b14e6918483a61 Martin KaFai Lau 2019-12-20 144 pr_warn("Cannot find struct %s in btf_vmlinux\n",
b14e6918483a61 Martin KaFai Lau 2019-12-20 145 st_ops->name);
b14e6918483a61 Martin KaFai Lau 2019-12-20 146 continue;
b14e6918483a61 Martin KaFai Lau 2019-12-20 147 }
b14e6918483a61 Martin KaFai Lau 2019-12-20 148 t = btf_type_by_id(_btf_vmlinux, type_id);
b14e6918483a61 Martin KaFai Lau 2019-12-20 149 if (btf_type_vlen(t) > BPF_STRUCT_OPS_MAX_NR_MEMBERS) {
b14e6918483a61 Martin KaFai Lau 2019-12-20 150 pr_warn("Cannot support #%u members in struct %s\n",
b14e6918483a61 Martin KaFai Lau 2019-12-20 151 btf_type_vlen(t), st_ops->name);
b14e6918483a61 Martin KaFai Lau 2019-12-20 152 continue;
b14e6918483a61 Martin KaFai Lau 2019-12-20 153 }
b14e6918483a61 Martin KaFai Lau 2019-12-20 154
b14e6918483a61 Martin KaFai Lau 2019-12-20 155 for_each_member(j, t, member) {
b14e6918483a61 Martin KaFai Lau 2019-12-20 156 const struct btf_type *func_proto;
b14e6918483a61 Martin KaFai Lau 2019-12-20 157
b14e6918483a61 Martin KaFai Lau 2019-12-20 158 mname = btf_name_by_offset(_btf_vmlinux,
b14e6918483a61 Martin KaFai Lau 2019-12-20 159 member->name_off);
b14e6918483a61 Martin KaFai Lau 2019-12-20 160 if (!*mname) {
b14e6918483a61 Martin KaFai Lau 2019-12-20 161 pr_warn("anon member in struct %s is not supported\n",
b14e6918483a61 Martin KaFai Lau 2019-12-20 162 st_ops->name);
b14e6918483a61 Martin KaFai Lau 2019-12-20 163 break;
b14e6918483a61 Martin KaFai Lau 2019-12-20 164 }
b14e6918483a61 Martin KaFai Lau 2019-12-20 165
b14e6918483a61 Martin KaFai Lau 2019-12-20 166 if (btf_member_bitfield_size(t, member)) {
b14e6918483a61 Martin KaFai Lau 2019-12-20 167 pr_warn("bit field member %s in struct %s is not supported\n",
b14e6918483a61 Martin KaFai Lau 2019-12-20 168 mname, st_ops->name);
b14e6918483a61 Martin KaFai Lau 2019-12-20 169 break;
b14e6918483a61 Martin KaFai Lau 2019-12-20 170 }
b14e6918483a61 Martin KaFai Lau 2019-12-20 171
b14e6918483a61 Martin KaFai Lau 2019-12-20 172 func_proto = btf_type_resolve_func_ptr(_btf_vmlinux,
b14e6918483a61 Martin KaFai Lau 2019-12-20 173 member->type,
b14e6918483a61 Martin KaFai Lau 2019-12-20 174 NULL);
b14e6918483a61 Martin KaFai Lau 2019-12-20 175 if (func_proto &&
b14e6918483a61 Martin KaFai Lau 2019-12-20 176 btf_distill_func_proto(&log, _btf_vmlinux,
b14e6918483a61 Martin KaFai Lau 2019-12-20 177 func_proto, mname,
b14e6918483a61 Martin KaFai Lau 2019-12-20 178 &st_ops->func_models[j])) {
b14e6918483a61 Martin KaFai Lau 2019-12-20 179 pr_warn("Error in parsing func ptr %s in struct %s\n",
b14e6918483a61 Martin KaFai Lau 2019-12-20 180 mname, st_ops->name);
b14e6918483a61 Martin KaFai Lau 2019-12-20 181 break;
b14e6918483a61 Martin KaFai Lau 2019-12-20 182 }
b14e6918483a61 Martin KaFai Lau 2019-12-20 183 }
b14e6918483a61 Martin KaFai Lau 2019-12-20 184
b14e6918483a61 Martin KaFai Lau 2019-12-20 185 if (j == btf_type_vlen(t)) {
b14e6918483a61 Martin KaFai Lau 2019-12-20 186 if (st_ops->init(_btf_vmlinux)) {
b14e6918483a61 Martin KaFai Lau 2019-12-20 187 pr_warn("Error in init bpf_struct_ops %s\n",
b14e6918483a61 Martin KaFai Lau 2019-12-20 188 st_ops->name);
b14e6918483a61 Martin KaFai Lau 2019-12-20 189 } else {
b14e6918483a61 Martin KaFai Lau 2019-12-20 190 st_ops->type_id = type_id;
b14e6918483a61 Martin KaFai Lau 2019-12-20 191 st_ops->type = t;
d69ac27055a81d Martin KaFai Lau 2019-12-20 192 st_ops->value_id = value_id;
d69ac27055a81d Martin KaFai Lau 2019-12-20 193 st_ops->value_type =
d69ac27055a81d Martin KaFai Lau 2019-12-20 194 btf_type_by_id(_btf_vmlinux, value_id);
b14e6918483a61 Martin KaFai Lau 2019-12-20 195 }
b14e6918483a61 Martin KaFai Lau 2019-12-20 196 }
b14e6918483a61 Martin KaFai Lau 2019-12-20 197 }
b14e6918483a61 Martin KaFai Lau 2019-12-20 @198 }
b14e6918483a61 Martin KaFai Lau 2019-12-20 199
:::::: The code at line 198 was first introduced by commit
:::::: b14e6918483a61bb02672580bde0aa60f4cce17d bpf: Introduce BPF_PROG_TYPE_STRUCT_OPS
:::::: TO: Martin KaFai Lau <kafai@...com>
:::::: CC: 0day robot <lkp@...el.com>
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org Intel Corporation
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