tree: https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git master head: f8b33d8e870758ccff13e5f81fd5050b52a42d35 commit: 14ca0751c96f8d3d0f52e8ed3b3236f8b34d3460 [1077/1082] bpf: support for access to tunnel options config: x86_64-randconfig-i0-03080544 (attached as .config) reproduce: git checkout 14ca0751c96f8d3d0f52e8ed3b3236f8b34d3460 # save the attached .config to linux build tree make ARCH=x86_64
All errors (new ones prefixed by >>):
net/core/filter.c: In function 'bpf_skb_get_tunnel_opt':
>> net/core/filter.c:1824:2: error: implicit declaration of function
>> 'ip_tunnel_info_opts_get' [-Werror=implicit-function-declaration]
ip_tunnel_info_opts_get(to, info);
^
net/core/filter.c: In function 'bpf_skb_set_tunnel_opt':
>> net/core/filter.c:1918:2: error: implicit declaration of function
>> 'ip_tunnel_info_opts_set' [-Werror=implicit-function-declaration]
ip_tunnel_info_opts_set(info, from, size);
^
cc1: some warnings being treated as errors
vim +/ip_tunnel_info_opts_get +1824 net/core/filter.c
1818 if (unlikely(!info ||
1819 !(info->key.tun_flags & TUNNEL_OPTIONS_PRESENT)))
1820 return -ENOENT;
1821 if (unlikely(size < info->options_len))
1822 return -ENOMEM;
1823
> 1824 ip_tunnel_info_opts_get(to, info);
1825
1826 return info->options_len;
1827 }
1828
1829 static const struct bpf_func_proto bpf_skb_get_tunnel_opt_proto = {
1830 .func = bpf_skb_get_tunnel_opt,
1831 .gpl_only = false,
1832 .ret_type = RET_INTEGER,
1833 .arg1_type = ARG_PTR_TO_CTX,
1834 .arg2_type = ARG_PTR_TO_STACK,
1835 .arg3_type = ARG_CONST_STACK_SIZE,
1836 };
1837
1838 static struct metadata_dst __percpu *md_dst;
1839
1840 static u64 bpf_skb_set_tunnel_key(u64 r1, u64 r2, u64 size, u64 flags,
u64 r5)
1841 {
1842 struct sk_buff *skb = (struct sk_buff *) (long) r1;
1843 struct bpf_tunnel_key *from = (struct bpf_tunnel_key *) (long)
r2;
1844 struct metadata_dst *md = this_cpu_ptr(md_dst);
1845 u8 compat[sizeof(struct bpf_tunnel_key)];
1846 struct ip_tunnel_info *info;
1847
1848 if (unlikely(flags & ~(BPF_F_TUNINFO_IPV6 | BPF_F_ZERO_CSUM_TX |
1849 BPF_F_DONT_FRAGMENT)))
1850 return -EINVAL;
1851 if (unlikely(size != sizeof(struct bpf_tunnel_key))) {
1852 switch (size) {
1853 case offsetof(struct bpf_tunnel_key, remote_ipv6[1]):
1854 /* Fixup deprecated structure layouts here, so
we have
1855 * a common path later on.
1856 */
1857 memcpy(compat, from, size);
1858 memset(compat + size, 0, sizeof(compat) - size);
1859 from = (struct bpf_tunnel_key *)compat;
1860 break;
1861 default:
1862 return -EINVAL;
1863 }
1864 }
1865
1866 skb_dst_drop(skb);
1867 dst_hold((struct dst_entry *) md);
1868 skb_dst_set(skb, (struct dst_entry *) md);
1869
1870 info = &md->u.tun_info;
1871 info->mode = IP_TUNNEL_INFO_TX;
1872
1873 info->key.tun_flags = TUNNEL_KEY | TUNNEL_CSUM;
1874 if (flags & BPF_F_DONT_FRAGMENT)
1875 info->key.tun_flags |= TUNNEL_DONT_FRAGMENT;
1876
1877 info->key.tun_id = cpu_to_be64(from->tunnel_id);
1878 info->key.tos = from->tunnel_tos;
1879 info->key.ttl = from->tunnel_ttl;
1880
1881 if (flags & BPF_F_TUNINFO_IPV6) {
1882 info->mode |= IP_TUNNEL_INFO_IPV6;
1883 memcpy(&info->key.u.ipv6.dst, from->remote_ipv6,
1884 sizeof(from->remote_ipv6));
1885 } else {
1886 info->key.u.ipv4.dst = cpu_to_be32(from->remote_ipv4);
1887 if (flags & BPF_F_ZERO_CSUM_TX)
1888 info->key.tun_flags &= ~TUNNEL_CSUM;
1889 }
1890
1891 return 0;
1892 }
1893
1894 static const struct bpf_func_proto bpf_skb_set_tunnel_key_proto = {
1895 .func = bpf_skb_set_tunnel_key,
1896 .gpl_only = false,
1897 .ret_type = RET_INTEGER,
1898 .arg1_type = ARG_PTR_TO_CTX,
1899 .arg2_type = ARG_PTR_TO_STACK,
1900 .arg3_type = ARG_CONST_STACK_SIZE,
1901 .arg4_type = ARG_ANYTHING,
1902 };
1903
1904 #define BPF_TUNLEN_MAX 255
1905
1906 static u64 bpf_skb_set_tunnel_opt(u64 r1, u64 r2, u64 size, u64 r4, u64
r5)
1907 {
1908 struct sk_buff *skb = (struct sk_buff *) (long) r1;
1909 u8 *from = (u8 *) (long) r2;
1910 struct ip_tunnel_info *info = skb_tunnel_info(skb);
1911 const struct metadata_dst *md = this_cpu_ptr(md_dst);
1912
1913 if (unlikely(info != &md->u.tun_info || (size & (sizeof(u32) -
1))))
1914 return -EINVAL;
1915 if (unlikely(size > BPF_TUNLEN_MAX))
1916 return -ENOMEM;
1917
> 1918 ip_tunnel_info_opts_set(info, from, size);
1919
1920 return 0;
1921 }
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0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
.config.gz
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