diff options
Diffstat (limited to '')
| -rw-r--r-- | include/linux/ipv6.h | 1 | ||||
| -rw-r--r-- | net/ipv6/ip6_output.c | 11 | ||||
| -rwxr-xr-x | tools/testing/selftests/net/cmsg_ip.sh | 11 | ||||
| -rw-r--r-- | tools/testing/selftests/net/cmsg_sender.c | 24 |
4 files changed, 32 insertions, 15 deletions
diff --git a/include/linux/ipv6.h b/include/linux/ipv6.h index a6e2aadbb91b..5aeeed22f35b 100644 --- a/include/linux/ipv6.h +++ b/include/linux/ipv6.h @@ -207,6 +207,7 @@ struct inet6_cork { struct ipv6_txoptions *opt; u8 hop_limit; u8 tclass; + u8 dontfrag:1; }; /* struct ipv6_pinfo - ipv6 private area */ diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c index d577bf2f3053..581bc6289081 100644 --- a/net/ipv6/ip6_output.c +++ b/net/ipv6/ip6_output.c @@ -1386,6 +1386,7 @@ static int ip6_setup_cork(struct sock *sk, struct inet_cork_full *cork, } v6_cork->hop_limit = ipc6->hlimit; v6_cork->tclass = ipc6->tclass; + v6_cork->dontfrag = ipc6->dontfrag; if (rt->dst.flags & DST_XFRM_TUNNEL) mtu = READ_ONCE(np->pmtudisc) >= IPV6_PMTUDISC_PROBE ? READ_ONCE(rt->dst.dev->mtu) : dst_mtu(&rt->dst); @@ -1421,7 +1422,7 @@ static int __ip6_append_data(struct sock *sk, int getfrag(void *from, char *to, int offset, int len, int odd, struct sk_buff *skb), void *from, size_t length, int transhdrlen, - unsigned int flags, struct ipcm6_cookie *ipc6) + unsigned int flags) { struct sk_buff *skb, *skb_prev = NULL; struct inet_cork *cork = &cork_full->base; @@ -1475,7 +1476,7 @@ static int __ip6_append_data(struct sock *sk, if (headersize + transhdrlen > mtu) goto emsgsize; - if (cork->length + length > mtu - headersize && ipc6->dontfrag && + if (cork->length + length > mtu - headersize && v6_cork->dontfrag && (sk->sk_protocol == IPPROTO_UDP || sk->sk_protocol == IPPROTO_ICMPV6 || sk->sk_protocol == IPPROTO_RAW)) { @@ -1855,7 +1856,7 @@ int ip6_append_data(struct sock *sk, return __ip6_append_data(sk, &sk->sk_write_queue, &inet->cork, &np->cork, sk_page_frag(sk), getfrag, - from, length, transhdrlen, flags, ipc6); + from, length, transhdrlen, flags); } EXPORT_SYMBOL_GPL(ip6_append_data); @@ -2054,13 +2055,11 @@ struct sk_buff *ip6_make_skb(struct sock *sk, ip6_cork_release(cork, &v6_cork); return ERR_PTR(err); } - if (ipc6->dontfrag < 0) - ipc6->dontfrag = inet6_test_bit(DONTFRAG, sk); err = __ip6_append_data(sk, &queue, cork, &v6_cork, ¤t->task_frag, getfrag, from, length + exthdrlen, transhdrlen + exthdrlen, - flags, ipc6); + flags); if (err) { __ip6_flush_pending_frames(sk, &queue, cork, &v6_cork); return ERR_PTR(err); diff --git a/tools/testing/selftests/net/cmsg_ip.sh b/tools/testing/selftests/net/cmsg_ip.sh index 2a52520aca32..b55680e081ad 100755 --- a/tools/testing/selftests/net/cmsg_ip.sh +++ b/tools/testing/selftests/net/cmsg_ip.sh @@ -50,8 +50,9 @@ check_result() { # IPV6_DONTFRAG for ovr in setsock cmsg both diff; do for df in 0 1; do - for p in u i r; do + for p in u U i r; do [ $p == "u" ] && prot=UDP + [ $p == "U" ] && prot=UDP [ $p == "i" ] && prot=ICMP [ $p == "r" ] && prot=RAW @@ -81,8 +82,9 @@ test_dscp() { ip $IPVER -netns $NS route add table 300 prohibit any for ovr in setsock cmsg both diff; do - for p in u i r; do + for p in u U i r; do [ $p == "u" ] && prot=UDP + [ $p == "U" ] && prot=UDP [ $p == "i" ] && prot=ICMP [ $p == "r" ] && prot=RAW @@ -134,8 +136,9 @@ test_ttl_hoplimit() { local -r LIM=4 for ovr in setsock cmsg both diff; do - for p in u i r; do + for p in u U i r; do [ $p == "u" ] && prot=UDP + [ $p == "U" ] && prot=UDP [ $p == "i" ] && prot=ICMP [ $p == "r" ] && prot=RAW @@ -166,7 +169,7 @@ test_ttl_hoplimit -4 $TGT4 ttl test_ttl_hoplimit -6 $TGT6 hlim # IPV6 exthdr -for p in u i r; do +for p in u U i r; do # Very basic "does it crash" test for h in h d r; do $NSEXE ./cmsg_sender -p $p -6 -H $h $TGT6 1234 diff --git a/tools/testing/selftests/net/cmsg_sender.c b/tools/testing/selftests/net/cmsg_sender.c index 19bd8499031b..a825e628aee7 100644 --- a/tools/testing/selftests/net/cmsg_sender.c +++ b/tools/testing/selftests/net/cmsg_sender.c @@ -33,6 +33,7 @@ enum { ERN_RECVERR, ERN_CMSG_RD, ERN_CMSG_RCV, + ERN_SEND_MORE, }; struct option_cmsg_u32 { @@ -46,6 +47,7 @@ struct options { const char *service; unsigned int size; unsigned int num_pkt; + bool msg_more; struct { unsigned int mark; unsigned int dontfrag; @@ -94,7 +96,8 @@ static void __attribute__((noreturn)) cs_usage(const char *bin) "\t\t-S send() size\n" "\t\t-4/-6 Force IPv4 / IPv6 only\n" "\t\t-p prot Socket protocol\n" - "\t\t (u = UDP (default); i = ICMP; r = RAW)\n" + "\t\t (u = UDP (default); i = ICMP; r = RAW;\n" + "\t\t U = UDP with MSG_MORE)\n" "\n" "\t\t-m val Set SO_MARK with given value\n" "\t\t-M val Set SO_MARK via setsockopt\n" @@ -109,8 +112,8 @@ static void __attribute__((noreturn)) cs_usage(const char *bin) "\t\t-l val Set TTL/HOPLIMIT via cmsg\n" "\t\t-L val Set TTL/HOPLIMIT via setsockopt\n" "\t\t-H type Add an IPv6 header option\n" - "\t\t (h = HOP; d = DST; r = RTDST)" - ""); + "\t\t (h = HOP; d = DST; r = RTDST)\n" + "\n"); exit(ERN_HELP); } @@ -133,8 +136,11 @@ static void cs_parse_args(int argc, char *argv[]) opt.sock.family = AF_INET6; break; case 'p': - if (*optarg == 'u' || *optarg == 'U') { + if (*optarg == 'u') { opt.sock.proto = IPPROTO_UDP; + } else if (*optarg == 'U') { + opt.sock.proto = IPPROTO_UDP; + opt.msg_more = true; } else if (*optarg == 'i' || *optarg == 'I') { opt.sock.proto = IPPROTO_ICMP; } else if (*optarg == 'r') { @@ -531,7 +537,7 @@ int main(int argc, char *argv[]) cs_write_cmsg(fd, &msg, cbuf, sizeof(cbuf)); for (i = 0; i < opt.num_pkt; i++) { - err = sendmsg(fd, &msg, 0); + err = sendmsg(fd, &msg, opt.msg_more ? MSG_MORE : 0); if (err < 0) { if (!opt.silent_send) fprintf(stderr, "send failed: %s\n", strerror(errno)); @@ -542,6 +548,14 @@ int main(int argc, char *argv[]) err = ERN_SEND_SHORT; goto err_out; } + if (opt.msg_more) { + err = write(fd, NULL, 0); + if (err < 0) { + fprintf(stderr, "send more: %s\n", strerror(errno)); + err = ERN_SEND_MORE; + goto err_out; + } + } } err = ERN_SUCCESS; |