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Date: Fri, 14 Jun 2019 03:18:26 +0800
From: kbuild test robot <lkp@...el.com>
To: Martin KaFai Lau <kafai@...com>
Cc: kbuild-all@...org, bpf@...r.kernel.org, netdev@...r.kernel.org,
Alexei Starovoitov <ast@...com>,
Daniel Borkmann <daniel@...earbox.net>,
David Miller <davem@...emloft.net>, kernel-team@...com,
Craig Gallek <kraig@...gle.com>
Subject: Re: [PATCH bpf-next 1/2] bpf: net: Add SO_DETACH_REUSEPORT_BPF
Hi Martin,
I love your patch! Yet something to improve:
[auto build test ERROR on bpf-next/master]
url: https://github.com/0day-ci/linux/commits/Martin-KaFai-Lau/bpf-net-Add-SO_DETACH_REUSEPORT_BPF/20190614-015829
base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master
config: sparc64-allmodconfig (attached as .config)
compiler: sparc64-linux-gcc (GCC) 7.4.0
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=7.4.0 make.cross ARCH=sparc64
If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@...el.com>
All errors (new ones prefixed by >>):
net//core/sock.c: In function 'sock_setsockopt':
>> net//core/sock.c:1048:2: error: duplicate case value
case SO_DETACH_REUSEPORT_BPF:
^~~~
net//core/sock.c:912:2: note: previously used here
case SO_TIMESTAMP_NEW:
^~~~
vim +1048 net//core/sock.c
722
723 /*
724 * This is meant for all protocols to use and covers goings on
725 * at the socket level. Everything here is generic.
726 */
727
728 int sock_setsockopt(struct socket *sock, int level, int optname,
729 char __user *optval, unsigned int optlen)
730 {
731 struct sock_txtime sk_txtime;
732 struct sock *sk = sock->sk;
733 int val;
734 int valbool;
735 struct linger ling;
736 int ret = 0;
737
738 /*
739 * Options without arguments
740 */
741
742 if (optname == SO_BINDTODEVICE)
743 return sock_setbindtodevice(sk, optval, optlen);
744
745 if (optlen < sizeof(int))
746 return -EINVAL;
747
748 if (get_user(val, (int __user *)optval))
749 return -EFAULT;
750
751 valbool = val ? 1 : 0;
752
753 lock_sock(sk);
754
755 switch (optname) {
756 case SO_DEBUG:
757 if (val && !capable(CAP_NET_ADMIN))
758 ret = -EACCES;
759 else
760 sock_valbool_flag(sk, SOCK_DBG, valbool);
761 break;
762 case SO_REUSEADDR:
763 sk->sk_reuse = (valbool ? SK_CAN_REUSE : SK_NO_REUSE);
764 break;
765 case SO_REUSEPORT:
766 sk->sk_reuseport = valbool;
767 break;
768 case SO_TYPE:
769 case SO_PROTOCOL:
770 case SO_DOMAIN:
771 case SO_ERROR:
772 ret = -ENOPROTOOPT;
773 break;
774 case SO_DONTROUTE:
775 sock_valbool_flag(sk, SOCK_LOCALROUTE, valbool);
776 sk_dst_reset(sk);
777 break;
778 case SO_BROADCAST:
779 sock_valbool_flag(sk, SOCK_BROADCAST, valbool);
780 break;
781 case SO_SNDBUF:
782 /* Don't error on this BSD doesn't and if you think
783 * about it this is right. Otherwise apps have to
784 * play 'guess the biggest size' games. RCVBUF/SNDBUF
785 * are treated in BSD as hints
786 */
787 val = min_t(u32, val, sysctl_wmem_max);
788 set_sndbuf:
789 /* Ensure val * 2 fits into an int, to prevent max_t()
790 * from treating it as a negative value.
791 */
792 val = min_t(int, val, INT_MAX / 2);
793 sk->sk_userlocks |= SOCK_SNDBUF_LOCK;
794 sk->sk_sndbuf = max_t(int, val * 2, SOCK_MIN_SNDBUF);
795 /* Wake up sending tasks if we upped the value. */
796 sk->sk_write_space(sk);
797 break;
798
799 case SO_SNDBUFFORCE:
800 if (!capable(CAP_NET_ADMIN)) {
801 ret = -EPERM;
802 break;
803 }
804
805 /* No negative values (to prevent underflow, as val will be
806 * multiplied by 2).
807 */
808 if (val < 0)
809 val = 0;
810 goto set_sndbuf;
811
812 case SO_RCVBUF:
813 /* Don't error on this BSD doesn't and if you think
814 * about it this is right. Otherwise apps have to
815 * play 'guess the biggest size' games. RCVBUF/SNDBUF
816 * are treated in BSD as hints
817 */
818 val = min_t(u32, val, sysctl_rmem_max);
819 set_rcvbuf:
820 /* Ensure val * 2 fits into an int, to prevent max_t()
821 * from treating it as a negative value.
822 */
823 val = min_t(int, val, INT_MAX / 2);
824 sk->sk_userlocks |= SOCK_RCVBUF_LOCK;
825 /*
826 * We double it on the way in to account for
827 * "struct sk_buff" etc. overhead. Applications
828 * assume that the SO_RCVBUF setting they make will
829 * allow that much actual data to be received on that
830 * socket.
831 *
832 * Applications are unaware that "struct sk_buff" and
833 * other overheads allocate from the receive buffer
834 * during socket buffer allocation.
835 *
836 * And after considering the possible alternatives,
837 * returning the value we actually used in getsockopt
838 * is the most desirable behavior.
839 */
840 sk->sk_rcvbuf = max_t(int, val * 2, SOCK_MIN_RCVBUF);
841 break;
842
843 case SO_RCVBUFFORCE:
844 if (!capable(CAP_NET_ADMIN)) {
845 ret = -EPERM;
846 break;
847 }
848
849 /* No negative values (to prevent underflow, as val will be
850 * multiplied by 2).
851 */
852 if (val < 0)
853 val = 0;
854 goto set_rcvbuf;
855
856 case SO_KEEPALIVE:
857 if (sk->sk_prot->keepalive)
858 sk->sk_prot->keepalive(sk, valbool);
859 sock_valbool_flag(sk, SOCK_KEEPOPEN, valbool);
860 break;
861
862 case SO_OOBINLINE:
863 sock_valbool_flag(sk, SOCK_URGINLINE, valbool);
864 break;
865
866 case SO_NO_CHECK:
867 sk->sk_no_check_tx = valbool;
868 break;
869
870 case SO_PRIORITY:
871 if ((val >= 0 && val <= 6) ||
872 ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN))
873 sk->sk_priority = val;
874 else
875 ret = -EPERM;
876 break;
877
878 case SO_LINGER:
879 if (optlen < sizeof(ling)) {
880 ret = -EINVAL; /* 1003.1g */
881 break;
882 }
883 if (copy_from_user(&ling, optval, sizeof(ling))) {
884 ret = -EFAULT;
885 break;
886 }
887 if (!ling.l_onoff)
888 sock_reset_flag(sk, SOCK_LINGER);
889 else {
890 #if (BITS_PER_LONG == 32)
891 if ((unsigned int)ling.l_linger >= MAX_SCHEDULE_TIMEOUT/HZ)
892 sk->sk_lingertime = MAX_SCHEDULE_TIMEOUT;
893 else
894 #endif
895 sk->sk_lingertime = (unsigned int)ling.l_linger * HZ;
896 sock_set_flag(sk, SOCK_LINGER);
897 }
898 break;
899
900 case SO_BSDCOMPAT:
901 sock_warn_obsolete_bsdism("setsockopt");
902 break;
903
904 case SO_PASSCRED:
905 if (valbool)
906 set_bit(SOCK_PASSCRED, &sock->flags);
907 else
908 clear_bit(SOCK_PASSCRED, &sock->flags);
909 break;
910
911 case SO_TIMESTAMP_OLD:
912 case SO_TIMESTAMP_NEW:
913 case SO_TIMESTAMPNS_OLD:
914 case SO_TIMESTAMPNS_NEW:
915 if (valbool) {
916 if (optname == SO_TIMESTAMP_NEW || optname == SO_TIMESTAMPNS_NEW)
917 sock_set_flag(sk, SOCK_TSTAMP_NEW);
918 else
919 sock_reset_flag(sk, SOCK_TSTAMP_NEW);
920
921 if (optname == SO_TIMESTAMP_OLD || optname == SO_TIMESTAMP_NEW)
922 sock_reset_flag(sk, SOCK_RCVTSTAMPNS);
923 else
924 sock_set_flag(sk, SOCK_RCVTSTAMPNS);
925 sock_set_flag(sk, SOCK_RCVTSTAMP);
926 sock_enable_timestamp(sk, SOCK_TIMESTAMP);
927 } else {
928 sock_reset_flag(sk, SOCK_RCVTSTAMP);
929 sock_reset_flag(sk, SOCK_RCVTSTAMPNS);
930 sock_reset_flag(sk, SOCK_TSTAMP_NEW);
931 }
932 break;
933
934 case SO_TIMESTAMPING_NEW:
935 sock_set_flag(sk, SOCK_TSTAMP_NEW);
936 /* fall through */
937 case SO_TIMESTAMPING_OLD:
938 if (val & ~SOF_TIMESTAMPING_MASK) {
939 ret = -EINVAL;
940 break;
941 }
942
943 if (val & SOF_TIMESTAMPING_OPT_ID &&
944 !(sk->sk_tsflags & SOF_TIMESTAMPING_OPT_ID)) {
945 if (sk->sk_protocol == IPPROTO_TCP &&
946 sk->sk_type == SOCK_STREAM) {
947 if ((1 << sk->sk_state) &
948 (TCPF_CLOSE | TCPF_LISTEN)) {
949 ret = -EINVAL;
950 break;
951 }
952 sk->sk_tskey = tcp_sk(sk)->snd_una;
953 } else {
954 sk->sk_tskey = 0;
955 }
956 }
957
958 if (val & SOF_TIMESTAMPING_OPT_STATS &&
959 !(val & SOF_TIMESTAMPING_OPT_TSONLY)) {
960 ret = -EINVAL;
961 break;
962 }
963
964 sk->sk_tsflags = val;
965 if (val & SOF_TIMESTAMPING_RX_SOFTWARE)
966 sock_enable_timestamp(sk,
967 SOCK_TIMESTAMPING_RX_SOFTWARE);
968 else {
969 if (optname == SO_TIMESTAMPING_NEW)
970 sock_reset_flag(sk, SOCK_TSTAMP_NEW);
971
972 sock_disable_timestamp(sk,
973 (1UL << SOCK_TIMESTAMPING_RX_SOFTWARE));
974 }
975 break;
976
977 case SO_RCVLOWAT:
978 if (val < 0)
979 val = INT_MAX;
980 if (sock->ops->set_rcvlowat)
981 ret = sock->ops->set_rcvlowat(sk, val);
982 else
983 sk->sk_rcvlowat = val ? : 1;
984 break;
985
986 case SO_RCVTIMEO_OLD:
987 case SO_RCVTIMEO_NEW:
988 ret = sock_set_timeout(&sk->sk_rcvtimeo, optval, optlen, optname == SO_RCVTIMEO_OLD);
989 break;
990
991 case SO_SNDTIMEO_OLD:
992 case SO_SNDTIMEO_NEW:
993 ret = sock_set_timeout(&sk->sk_sndtimeo, optval, optlen, optname == SO_SNDTIMEO_OLD);
994 break;
995
996 case SO_ATTACH_FILTER:
997 ret = -EINVAL;
998 if (optlen == sizeof(struct sock_fprog)) {
999 struct sock_fprog fprog;
1000
1001 ret = -EFAULT;
1002 if (copy_from_user(&fprog, optval, sizeof(fprog)))
1003 break;
1004
1005 ret = sk_attach_filter(&fprog, sk);
1006 }
1007 break;
1008
1009 case SO_ATTACH_BPF:
1010 ret = -EINVAL;
1011 if (optlen == sizeof(u32)) {
1012 u32 ufd;
1013
1014 ret = -EFAULT;
1015 if (copy_from_user(&ufd, optval, sizeof(ufd)))
1016 break;
1017
1018 ret = sk_attach_bpf(ufd, sk);
1019 }
1020 break;
1021
1022 case SO_ATTACH_REUSEPORT_CBPF:
1023 ret = -EINVAL;
1024 if (optlen == sizeof(struct sock_fprog)) {
1025 struct sock_fprog fprog;
1026
1027 ret = -EFAULT;
1028 if (copy_from_user(&fprog, optval, sizeof(fprog)))
1029 break;
1030
1031 ret = sk_reuseport_attach_filter(&fprog, sk);
1032 }
1033 break;
1034
1035 case SO_ATTACH_REUSEPORT_EBPF:
1036 ret = -EINVAL;
1037 if (optlen == sizeof(u32)) {
1038 u32 ufd;
1039
1040 ret = -EFAULT;
1041 if (copy_from_user(&ufd, optval, sizeof(ufd)))
1042 break;
1043
1044 ret = sk_reuseport_attach_bpf(ufd, sk);
1045 }
1046 break;
1047
> 1048 case SO_DETACH_REUSEPORT_BPF:
1049 ret = reuseport_detach_prog(sk);
1050 break;
1051
1052 case SO_DETACH_FILTER:
1053 ret = sk_detach_filter(sk);
1054 break;
1055
1056 case SO_LOCK_FILTER:
1057 if (sock_flag(sk, SOCK_FILTER_LOCKED) && !valbool)
1058 ret = -EPERM;
1059 else
1060 sock_valbool_flag(sk, SOCK_FILTER_LOCKED, valbool);
1061 break;
1062
1063 case SO_PASSSEC:
1064 if (valbool)
1065 set_bit(SOCK_PASSSEC, &sock->flags);
1066 else
1067 clear_bit(SOCK_PASSSEC, &sock->flags);
1068 break;
1069 case SO_MARK:
1070 if (!ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN)) {
1071 ret = -EPERM;
1072 } else if (val != sk->sk_mark) {
1073 sk->sk_mark = val;
1074 sk_dst_reset(sk);
1075 }
1076 break;
1077
1078 case SO_RXQ_OVFL:
1079 sock_valbool_flag(sk, SOCK_RXQ_OVFL, valbool);
1080 break;
1081
1082 case SO_WIFI_STATUS:
1083 sock_valbool_flag(sk, SOCK_WIFI_STATUS, valbool);
1084 break;
1085
1086 case SO_PEEK_OFF:
1087 if (sock->ops->set_peek_off)
1088 ret = sock->ops->set_peek_off(sk, val);
1089 else
1090 ret = -EOPNOTSUPP;
1091 break;
1092
1093 case SO_NOFCS:
1094 sock_valbool_flag(sk, SOCK_NOFCS, valbool);
1095 break;
1096
1097 case SO_SELECT_ERR_QUEUE:
1098 sock_valbool_flag(sk, SOCK_SELECT_ERR_QUEUE, valbool);
1099 break;
1100
---
0-DAY kernel test infrastructure Open Source Technology Center
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