Lines Matching +full:foo +full:- +full:queue
1 // SPDX-License-Identifier: GPL-2.0-only
39 * silently drop skb instead of failing with -EPERM.
79 #include <linux/bpf-cgroup.h>
94 iph->check = 0; in ip_send_check()
95 iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl); in ip_send_check()
103 iph->tot_len = htons(skb->len); in __ip_local_out()
113 skb->protocol = htons(ETH_P_IP); in __ip_local_out()
116 net, sk, skb, NULL, skb_dst(skb)->dev, in __ip_local_out()
134 int ttl = inet->uc_ttl; in ip_select_ttl()
155 skb_push(skb, sizeof(struct iphdr) + (opt ? opt->opt.optlen : 0)); in ip_build_and_send_pkt()
158 iph->version = 4; in ip_build_and_send_pkt()
159 iph->ihl = 5; in ip_build_and_send_pkt()
160 iph->tos = tos; in ip_build_and_send_pkt()
161 iph->ttl = ip_select_ttl(inet, &rt->dst); in ip_build_and_send_pkt()
162 iph->daddr = (opt && opt->opt.srr ? opt->opt.faddr : daddr); in ip_build_and_send_pkt()
163 iph->saddr = saddr; in ip_build_and_send_pkt()
164 iph->protocol = sk->sk_protocol; in ip_build_and_send_pkt()
165 if (ip_dont_fragment(sk, &rt->dst)) { in ip_build_and_send_pkt()
166 iph->frag_off = htons(IP_DF); in ip_build_and_send_pkt()
167 iph->id = 0; in ip_build_and_send_pkt()
169 iph->frag_off = 0; in ip_build_and_send_pkt()
173 if (opt && opt->opt.optlen) { in ip_build_and_send_pkt()
174 iph->ihl += opt->opt.optlen>>2; in ip_build_and_send_pkt()
175 ip_options_build(skb, &opt->opt, daddr, rt, 0); in ip_build_and_send_pkt()
178 skb->priority = sk->sk_priority; in ip_build_and_send_pkt()
179 if (!skb->mark) in ip_build_and_send_pkt()
180 skb->mark = sk->sk_mark; in ip_build_and_send_pkt()
183 return ip_local_out(net, skb->sk, skb); in ip_build_and_send_pkt()
191 struct net_device *dev = dst->dev; in ip_finish_output2()
196 if (rt->rt_type == RTN_MULTICAST) { in ip_finish_output2()
197 IP_UPD_PO_STATS(net, IPSTATS_MIB_OUTMCAST, skb->len); in ip_finish_output2()
198 } else if (rt->rt_type == RTN_BROADCAST) in ip_finish_output2()
199 IP_UPD_PO_STATS(net, IPSTATS_MIB_OUTBCAST, skb->len); in ip_finish_output2()
202 if (unlikely(skb_headroom(skb) < hh_len && dev->header_ops)) { in ip_finish_output2()
208 return -ENOMEM; in ip_finish_output2()
210 if (skb->sk) in ip_finish_output2()
211 skb_set_owner_w(skb2, skb->sk); in ip_finish_output2()
216 if (lwtunnel_xmit_redirect(dst->lwtstate)) { in ip_finish_output2()
239 return -EINVAL; in ip_finish_output2()
254 /* Slowpath - GSO segment length exceeds the egress MTU. in ip_finish_output_gso()
257 * - Forwarding of a TCP GRO skb, when DF flag is not set. in ip_finish_output_gso()
258 * - Forwarding of an skb that arrived on a virtualization interface in ip_finish_output_gso()
259 * (virtio-net/vhost/tap) with TSO/GSO size set by other network in ip_finish_output_gso()
261 * - Local GSO skb transmitted on an NETIF_F_TSO tunnel stacked over an in ip_finish_output_gso()
263 * - Arriving GRO skb (or GSO skb in a virtualized environment) that is in ip_finish_output_gso()
272 return -ENOMEM; in ip_finish_output_gso()
296 if (skb_dst(skb)->xfrm) { in __ip_finish_output()
297 IPCB(skb)->flags |= IPSKB_REROUTED; in __ip_finish_output()
305 if (skb->len > mtu || (IPCB(skb)->flags & IPSKB_FRAG_PMTU)) in __ip_finish_output()
346 /* Reset rt_iif so that inet_iif() will return skb->skb_iif. Setting in ip_mc_finish_output()
347 * this to non-zero causes ipi_ifindex in in_pktinfo to be overwritten, in ip_mc_finish_output()
350 new_rt = rt_dst_clone(net->loopback_dev, skb_rtable(skb)); in ip_mc_finish_output()
352 new_rt->rt_iif = 0; in ip_mc_finish_output()
354 skb_dst_set(skb, &new_rt->dst); in ip_mc_finish_output()
364 struct net_device *dev = rt->dst.dev; in ip_mc_output()
369 IP_UPD_PO_STATS(net, IPSTATS_MIB_OUT, skb->len); in ip_mc_output()
371 skb->dev = dev; in ip_mc_output()
372 skb->protocol = htons(ETH_P_IP); in ip_mc_output()
378 if (rt->rt_flags&RTCF_MULTICAST) { in ip_mc_output()
390 ((rt->rt_flags & RTCF_LOCAL) || in ip_mc_output()
391 !(IPCB(skb)->flags & IPSKB_FORWARDED)) in ip_mc_output()
397 net, sk, newskb, NULL, newskb->dev, in ip_mc_output()
403 if (ip_hdr(skb)->ttl == 0) { in ip_mc_output()
409 if (rt->rt_flags&RTCF_BROADCAST) { in ip_mc_output()
413 net, sk, newskb, NULL, newskb->dev, in ip_mc_output()
418 net, sk, skb, NULL, skb->dev, in ip_mc_output()
420 !(IPCB(skb)->flags & IPSKB_REROUTED)); in ip_mc_output()
425 struct net_device *dev = skb_dst(skb)->dev, *indev = skb->dev; in ip_output()
427 IP_UPD_PO_STATS(net, IPSTATS_MIB_OUT, skb->len); in ip_output()
429 skb->dev = dev; in ip_output()
430 skb->protocol = htons(ETH_P_IP); in ip_output()
435 !(IPCB(skb)->flags & IPSKB_REROUTED)); in ip_output()
441 * iph->saddr = fl4->saddr;
442 * iph->daddr = fl4->daddr;
447 offsetof(typeof(*fl4), saddr) + sizeof(fl4->saddr)); in ip_copy_addrs()
448 memcpy(&iph->saddr, &fl4->saddr, in ip_copy_addrs()
449 sizeof(fl4->saddr) + sizeof(fl4->daddr)); in ip_copy_addrs()
452 /* Note: skb->sk can be different from sk, in case of tunnels */
468 inet_opt = rcu_dereference(inet->inet_opt); in __ip_queue_xmit()
469 fl4 = &fl->u.ip4; in __ip_queue_xmit()
480 daddr = inet->inet_daddr; in __ip_queue_xmit()
481 if (inet_opt && inet_opt->opt.srr) in __ip_queue_xmit()
482 daddr = inet_opt->opt.faddr; in __ip_queue_xmit()
489 daddr, inet->inet_saddr, in __ip_queue_xmit()
490 inet->inet_dport, in __ip_queue_xmit()
491 inet->inet_sport, in __ip_queue_xmit()
492 sk->sk_protocol, in __ip_queue_xmit()
494 sk->sk_bound_dev_if); in __ip_queue_xmit()
497 sk_setup_caps(sk, &rt->dst); in __ip_queue_xmit()
499 skb_dst_set_noref(skb, &rt->dst); in __ip_queue_xmit()
502 if (inet_opt && inet_opt->opt.is_strictroute && rt->rt_uses_gateway) in __ip_queue_xmit()
506 skb_push(skb, sizeof(struct iphdr) + (inet_opt ? inet_opt->opt.optlen : 0)); in __ip_queue_xmit()
510 if (ip_dont_fragment(sk, &rt->dst) && !skb->ignore_df) in __ip_queue_xmit()
511 iph->frag_off = htons(IP_DF); in __ip_queue_xmit()
513 iph->frag_off = 0; in __ip_queue_xmit()
514 iph->ttl = ip_select_ttl(inet, &rt->dst); in __ip_queue_xmit()
515 iph->protocol = sk->sk_protocol; in __ip_queue_xmit()
518 /* Transport layer set skb->h.foo itself. */ in __ip_queue_xmit()
520 if (inet_opt && inet_opt->opt.optlen) { in __ip_queue_xmit()
521 iph->ihl += inet_opt->opt.optlen >> 2; in __ip_queue_xmit()
522 ip_options_build(skb, &inet_opt->opt, inet->inet_daddr, rt, 0); in __ip_queue_xmit()
526 skb_shinfo(skb)->gso_segs ?: 1); in __ip_queue_xmit()
528 /* TODO : should we use skb->sk here instead of sk ? */ in __ip_queue_xmit()
529 skb->priority = sk->sk_priority; in __ip_queue_xmit()
530 skb->mark = sk->sk_mark; in __ip_queue_xmit()
540 return -EHOSTUNREACH; in __ip_queue_xmit()
546 return __ip_queue_xmit(sk, skb, fl, inet_sk(sk)->tos); in ip_queue_xmit()
552 to->pkt_type = from->pkt_type; in ip_copy_metadata()
553 to->priority = from->priority; in ip_copy_metadata()
554 to->protocol = from->protocol; in ip_copy_metadata()
555 to->skb_iif = from->skb_iif; in ip_copy_metadata()
558 to->dev = from->dev; in ip_copy_metadata()
559 to->mark = from->mark; in ip_copy_metadata()
564 to->tc_index = from->tc_index; in ip_copy_metadata()
569 to->ipvs_property = from->ipvs_property; in ip_copy_metadata()
580 if ((iph->frag_off & htons(IP_DF)) == 0) in ip_fragment()
583 if (unlikely(!skb->ignore_df || in ip_fragment()
584 (IPCB(skb)->frag_max_size && in ip_fragment()
585 IPCB(skb)->frag_max_size > mtu))) { in ip_fragment()
590 return -EMSGSIZE; in ip_fragment()
601 iter->frag = skb_shinfo(skb)->frag_list; in ip_fraglist_init()
604 iter->offset = 0; in ip_fraglist_init()
605 iter->iph = iph; in ip_fraglist_init()
606 iter->hlen = hlen; in ip_fraglist_init()
608 skb->data_len = first_len - skb_headlen(skb); in ip_fraglist_init()
609 skb->len = first_len; in ip_fraglist_init()
610 iph->tot_len = htons(first_len); in ip_fraglist_init()
611 iph->frag_off = htons(IP_MF); in ip_fraglist_init()
619 struct sk_buff *to = iter->frag; in ip_fraglist_ipcb_prepare()
622 IPCB(to)->flags = IPCB(skb)->flags; in ip_fraglist_ipcb_prepare()
624 if (iter->offset == 0) in ip_fraglist_ipcb_prepare()
630 unsigned int hlen = iter->hlen; in ip_fraglist_prepare()
631 struct iphdr *iph = iter->iph; in ip_fraglist_prepare()
634 frag = iter->frag; in ip_fraglist_prepare()
635 frag->ip_summed = CHECKSUM_NONE; in ip_fraglist_prepare()
640 iter->iph = ip_hdr(frag); in ip_fraglist_prepare()
641 iph = iter->iph; in ip_fraglist_prepare()
642 iph->tot_len = htons(frag->len); in ip_fraglist_prepare()
644 iter->offset += skb->len - hlen; in ip_fraglist_prepare()
645 iph->frag_off = htons(iter->offset >> 3); in ip_fraglist_prepare()
646 if (frag->next) in ip_fraglist_prepare()
647 iph->frag_off |= htons(IP_MF); in ip_fraglist_prepare()
659 state->DF = DF; in ip_frag_init()
660 state->hlen = hlen; in ip_frag_init()
661 state->ll_rs = ll_rs; in ip_frag_init()
662 state->mtu = mtu; in ip_frag_init()
664 state->left = skb->len - hlen; /* Space per frame */ in ip_frag_init()
665 state->ptr = hlen; /* Where to start from */ in ip_frag_init()
667 state->offset = (ntohs(iph->frag_off) & IP_OFFSET) << 3; in ip_frag_init()
668 state->not_last_frag = iph->frag_off & htons(IP_MF); in ip_frag_init()
676 IPCB(to)->flags = IPCB(from)->flags; in ip_frag_ipcb()
690 unsigned int len = state->left; in ip_frag_next()
694 len = state->left; in ip_frag_next()
695 /* IF: it doesn't fit, use 'mtu' - the data space left */ in ip_frag_next()
696 if (len > state->mtu) in ip_frag_next()
697 len = state->mtu; in ip_frag_next()
700 if (len < state->left) { in ip_frag_next()
705 skb2 = alloc_skb(len + state->hlen + state->ll_rs, GFP_ATOMIC); in ip_frag_next()
707 return ERR_PTR(-ENOMEM); in ip_frag_next()
714 skb_reserve(skb2, state->ll_rs); in ip_frag_next()
715 skb_put(skb2, len + state->hlen); in ip_frag_next()
717 skb2->transport_header = skb2->network_header + state->hlen; in ip_frag_next()
724 if (skb->sk) in ip_frag_next()
725 skb_set_owner_w(skb2, skb->sk); in ip_frag_next()
731 skb_copy_from_linear_data(skb, skb_network_header(skb2), state->hlen); in ip_frag_next()
736 if (skb_copy_bits(skb, state->ptr, skb_transport_header(skb2), len)) in ip_frag_next()
738 state->left -= len; in ip_frag_next()
744 iph->frag_off = htons((state->offset >> 3)); in ip_frag_next()
745 if (state->DF) in ip_frag_next()
746 iph->frag_off |= htons(IP_DF); in ip_frag_next()
752 if (state->left > 0 || state->not_last_frag) in ip_frag_next()
753 iph->frag_off |= htons(IP_MF); in ip_frag_next()
754 state->ptr += len; in ip_frag_next()
755 state->offset += len; in ip_frag_next()
757 iph->tot_len = htons(len + state->hlen); in ip_frag_next()
769 * single device frame, and queue such a frame for sending.
780 ktime_t tstamp = skb->tstamp; in ip_do_fragment()
785 if (skb->ip_summed == CHECKSUM_PARTIAL && in ip_do_fragment()
796 if (IPCB(skb)->frag_max_size && IPCB(skb)->frag_max_size < mtu) in ip_do_fragment()
797 mtu = IPCB(skb)->frag_max_size; in ip_do_fragment()
803 hlen = iph->ihl * 4; in ip_do_fragment()
804 mtu = mtu - hlen; /* Size of data space */ in ip_do_fragment()
805 IPCB(skb)->flags |= IPSKB_FRAG_COMPLETE; in ip_do_fragment()
806 ll_rs = LL_RESERVED_SPACE(rt->dst.dev); in ip_do_fragment()
819 if (first_len - hlen > mtu || in ip_do_fragment()
820 ((first_len - hlen) & 7) || in ip_do_fragment()
828 if (frag->len > mtu || in ip_do_fragment()
829 ((frag->len & 7) && frag->next) || in ip_do_fragment()
837 BUG_ON(frag->sk); in ip_do_fragment()
838 if (skb->sk) { in ip_do_fragment()
839 frag->sk = skb->sk; in ip_do_fragment()
840 frag->destructor = sock_wfree; in ip_do_fragment()
842 skb->truesize -= frag->truesize; in ip_do_fragment()
856 skb->tstamp = tstamp; in ip_do_fragment()
881 frag2->sk = NULL; in ip_do_fragment()
882 frag2->destructor = NULL; in ip_do_fragment()
883 skb->truesize += frag2->truesize; in ip_do_fragment()
892 ip_frag_init(skb, hlen, ll_rs, mtu, IPCB(skb)->flags & IPSKB_FRAG_PMTU, in ip_do_fragment()
910 * Put this fragment into the sending queue. in ip_do_fragment()
912 skb2->tstamp = tstamp; in ip_do_fragment()
935 if (skb->ip_summed == CHECKSUM_PARTIAL) { in ip_generic_getfrag()
936 if (!copy_from_iter_full(to, len, &msg->msg_iter)) in ip_generic_getfrag()
937 return -EFAULT; in ip_generic_getfrag()
940 if (!csum_and_copy_from_iter_full(to, len, &csum, &msg->msg_iter)) in ip_generic_getfrag()
941 return -EFAULT; in ip_generic_getfrag()
942 skb->csum = csum_block_add(skb->csum, csum, odd); in ip_generic_getfrag()
961 struct sk_buff_head *queue, in __ip_append_data() argument
973 struct ip_options *opt = cork->opt; in __ip_append_data()
982 struct rtable *rt = (struct rtable *)cork->dst; in __ip_append_data()
987 skb = skb_peek_tail(queue); in __ip_append_data()
989 exthdrlen = !skb ? rt->dst.header_len : 0; in __ip_append_data()
990 mtu = cork->gso_size ? IP_MAX_MTU : cork->fragsize; in __ip_append_data()
991 paged = !!cork->gso_size; in __ip_append_data()
993 if (cork->tx_flags & SKBTX_ANY_SW_TSTAMP && in __ip_append_data()
994 sk->sk_tsflags & SOF_TIMESTAMPING_OPT_ID) in __ip_append_data()
995 tskey = sk->sk_tskey++; in __ip_append_data()
997 hh_len = LL_RESERVED_SPACE(rt->dst.dev); in __ip_append_data()
999 fragheaderlen = sizeof(struct iphdr) + (opt ? opt->optlen : 0); in __ip_append_data()
1000 maxfraglen = ((mtu - fragheaderlen) & ~7) + fragheaderlen; in __ip_append_data()
1003 if (cork->length + length > maxnonfragsize - fragheaderlen) { in __ip_append_data()
1004 ip_local_error(sk, EMSGSIZE, fl4->daddr, inet->inet_dport, in __ip_append_data()
1005 mtu - (opt ? opt->optlen : 0)); in __ip_append_data()
1006 return -EMSGSIZE; in __ip_append_data()
1015 rt->dst.dev->features & (NETIF_F_HW_CSUM | NETIF_F_IP_CSUM) && in __ip_append_data()
1016 (!(flags & MSG_MORE) || cork->gso_size) && in __ip_append_data()
1017 (!exthdrlen || (rt->dst.dev->features & NETIF_F_HW_ESP_TX_CSUM))) in __ip_append_data()
1023 return -ENOBUFS; in __ip_append_data()
1025 if (rt->dst.dev->features & NETIF_F_SG && in __ip_append_data()
1029 uarg->zerocopy = 0; in __ip_append_data()
1034 cork->length += length; in __ip_append_data()
1048 copy = mtu - skb->len; in __ip_append_data()
1050 copy = maxfraglen - skb->len; in __ip_append_data()
1062 fraggap = skb_prev->len - maxfraglen; in __ip_append_data()
1071 if (datalen > mtu - fragheaderlen) in __ip_append_data()
1072 datalen = maxfraglen - fragheaderlen; in __ip_append_data()
1077 !(rt->dst.dev->features&NETIF_F_SG)) in __ip_append_data()
1083 pagedlen = fraglen - alloclen; in __ip_append_data()
1094 alloclen += rt->dst.trailer_len; in __ip_append_data()
1102 if (refcount_read(&sk->sk_wmem_alloc) + wmem_alloc_delta <= in __ip_append_data()
1103 2 * sk->sk_sndbuf) in __ip_append_data()
1105 sk->sk_allocation); in __ip_append_data()
1107 err = -ENOBUFS; in __ip_append_data()
1115 skb->ip_summed = csummode; in __ip_append_data()
1116 skb->csum = 0; in __ip_append_data()
1122 data = skb_put(skb, fraglen + exthdrlen - pagedlen); in __ip_append_data()
1124 skb->transport_header = (skb->network_header + in __ip_append_data()
1129 skb->csum = skb_copy_and_csum_bits( in __ip_append_data()
1132 skb_prev->csum = csum_sub(skb_prev->csum, in __ip_append_data()
1133 skb->csum); in __ip_append_data()
1138 copy = datalen - transhdrlen - fraggap - pagedlen; in __ip_append_data()
1140 err = -EFAULT; in __ip_append_data()
1146 length -= copy + transhdrlen; in __ip_append_data()
1152 skb_shinfo(skb)->tx_flags = cork->tx_flags; in __ip_append_data()
1153 cork->tx_flags = 0; in __ip_append_data()
1154 skb_shinfo(skb)->tskey = tskey; in __ip_append_data()
1162 * Put the packet on the pending queue. in __ip_append_data()
1164 if (!skb->destructor) { in __ip_append_data()
1165 skb->destructor = sock_wfree; in __ip_append_data()
1166 skb->sk = sk; in __ip_append_data()
1167 wmem_alloc_delta += skb->truesize; in __ip_append_data()
1169 __skb_queue_tail(queue, skb); in __ip_append_data()
1176 if (!(rt->dst.dev->features&NETIF_F_SG) && in __ip_append_data()
1180 off = skb->len; in __ip_append_data()
1184 err = -EFAULT; in __ip_append_data()
1187 } else if (!uarg || !uarg->zerocopy) { in __ip_append_data()
1188 int i = skb_shinfo(skb)->nr_frags; in __ip_append_data()
1190 err = -ENOMEM; in __ip_append_data()
1194 if (!skb_can_coalesce(skb, i, pfrag->page, in __ip_append_data()
1195 pfrag->offset)) { in __ip_append_data()
1196 err = -EMSGSIZE; in __ip_append_data()
1200 __skb_fill_page_desc(skb, i, pfrag->page, in __ip_append_data()
1201 pfrag->offset, 0); in __ip_append_data()
1202 skb_shinfo(skb)->nr_frags = ++i; in __ip_append_data()
1203 get_page(pfrag->page); in __ip_append_data()
1205 copy = min_t(int, copy, pfrag->size - pfrag->offset); in __ip_append_data()
1207 page_address(pfrag->page) + pfrag->offset, in __ip_append_data()
1208 offset, copy, skb->len, skb) < 0) in __ip_append_data()
1211 pfrag->offset += copy; in __ip_append_data()
1212 skb_frag_size_add(&skb_shinfo(skb)->frags[i - 1], copy); in __ip_append_data()
1213 skb->len += copy; in __ip_append_data()
1214 skb->data_len += copy; in __ip_append_data()
1215 skb->truesize += copy; in __ip_append_data()
1223 length -= copy; in __ip_append_data()
1227 refcount_add(wmem_alloc_delta, &sk->sk_wmem_alloc); in __ip_append_data()
1231 err = -EFAULT; in __ip_append_data()
1235 cork->length -= length; in __ip_append_data()
1237 refcount_add(wmem_alloc_delta, &sk->sk_wmem_alloc); in __ip_append_data()
1249 return -EFAULT; in ip_setup_cork()
1254 opt = ipc->opt; in ip_setup_cork()
1256 if (!cork->opt) { in ip_setup_cork()
1257 cork->opt = kmalloc(sizeof(struct ip_options) + 40, in ip_setup_cork()
1258 sk->sk_allocation); in ip_setup_cork()
1259 if (unlikely(!cork->opt)) in ip_setup_cork()
1260 return -ENOBUFS; in ip_setup_cork()
1262 memcpy(cork->opt, &opt->opt, sizeof(struct ip_options) + opt->opt.optlen); in ip_setup_cork()
1263 cork->flags |= IPCORK_OPT; in ip_setup_cork()
1264 cork->addr = ipc->addr; in ip_setup_cork()
1267 cork->fragsize = ip_sk_use_pmtu(sk) ? in ip_setup_cork()
1268 dst_mtu(&rt->dst) : READ_ONCE(rt->dst.dev->mtu); in ip_setup_cork()
1270 if (!inetdev_valid_mtu(cork->fragsize)) in ip_setup_cork()
1271 return -ENETUNREACH; in ip_setup_cork()
1273 cork->gso_size = ipc->gso_size; in ip_setup_cork()
1275 cork->dst = &rt->dst; in ip_setup_cork()
1279 cork->length = 0; in ip_setup_cork()
1280 cork->ttl = ipc->ttl; in ip_setup_cork()
1281 cork->tos = ipc->tos; in ip_setup_cork()
1282 cork->mark = ipc->sockc.mark; in ip_setup_cork()
1283 cork->priority = ipc->priority; in ip_setup_cork()
1284 cork->transmit_time = ipc->sockc.transmit_time; in ip_setup_cork()
1285 cork->tx_flags = 0; in ip_setup_cork()
1286 sock_tx_timestamp(sk, ipc->sockc.tsflags, &cork->tx_flags); in ip_setup_cork()
1295 * or non-page data.
1297 * Not only UDP, other transport protocols - e.g. raw sockets - can use
1315 if (skb_queue_empty(&sk->sk_write_queue)) { in ip_append_data()
1316 err = ip_setup_cork(sk, &inet->cork.base, ipc, rtp); in ip_append_data()
1323 return __ip_append_data(sk, fl4, &sk->sk_write_queue, &inet->cork.base, in ip_append_data()
1342 if (inet->hdrincl) in ip_append_page()
1343 return -EPERM; in ip_append_page()
1348 if (skb_queue_empty(&sk->sk_write_queue)) in ip_append_page()
1349 return -EINVAL; in ip_append_page()
1351 cork = &inet->cork.base; in ip_append_page()
1352 rt = (struct rtable *)cork->dst; in ip_append_page()
1353 if (cork->flags & IPCORK_OPT) in ip_append_page()
1354 opt = cork->opt; in ip_append_page()
1356 if (!(rt->dst.dev->features & NETIF_F_SG)) in ip_append_page()
1357 return -EOPNOTSUPP; in ip_append_page()
1359 hh_len = LL_RESERVED_SPACE(rt->dst.dev); in ip_append_page()
1360 mtu = cork->gso_size ? IP_MAX_MTU : cork->fragsize; in ip_append_page()
1362 fragheaderlen = sizeof(struct iphdr) + (opt ? opt->optlen : 0); in ip_append_page()
1363 maxfraglen = ((mtu - fragheaderlen) & ~7) + fragheaderlen; in ip_append_page()
1366 if (cork->length + size > maxnonfragsize - fragheaderlen) { in ip_append_page()
1367 ip_local_error(sk, EMSGSIZE, fl4->daddr, inet->inet_dport, in ip_append_page()
1368 mtu - (opt ? opt->optlen : 0)); in ip_append_page()
1369 return -EMSGSIZE; in ip_append_page()
1372 skb = skb_peek_tail(&sk->sk_write_queue); in ip_append_page()
1374 return -EINVAL; in ip_append_page()
1376 cork->length += size; in ip_append_page()
1380 len = mtu - skb->len; in ip_append_page()
1382 len = maxfraglen - skb->len; in ip_append_page()
1389 fraggap = skb_prev->len - maxfraglen; in ip_append_page()
1392 skb = sock_wmalloc(sk, alloclen, 1, sk->sk_allocation); in ip_append_page()
1394 err = -ENOBUFS; in ip_append_page()
1401 skb->ip_summed = CHECKSUM_NONE; in ip_append_page()
1402 skb->csum = 0; in ip_append_page()
1410 skb->transport_header = (skb->network_header + in ip_append_page()
1413 skb->csum = skb_copy_and_csum_bits(skb_prev, in ip_append_page()
1417 skb_prev->csum = csum_sub(skb_prev->csum, in ip_append_page()
1418 skb->csum); in ip_append_page()
1423 * Put the packet on the pending queue. in ip_append_page()
1425 __skb_queue_tail(&sk->sk_write_queue, skb); in ip_append_page()
1433 err = -EMSGSIZE; in ip_append_page()
1437 if (skb->ip_summed == CHECKSUM_NONE) { in ip_append_page()
1440 skb->csum = csum_block_add(skb->csum, csum, skb->len); in ip_append_page()
1443 skb->len += len; in ip_append_page()
1444 skb->data_len += len; in ip_append_page()
1445 skb->truesize += len; in ip_append_page()
1446 refcount_add(len, &sk->sk_wmem_alloc); in ip_append_page()
1448 size -= len; in ip_append_page()
1453 cork->length -= size; in ip_append_page()
1460 cork->flags &= ~IPCORK_OPT; in ip_cork_release()
1461 kfree(cork->opt); in ip_cork_release()
1462 cork->opt = NULL; in ip_cork_release()
1463 dst_release(cork->dst); in ip_cork_release()
1464 cork->dst = NULL; in ip_cork_release()
1473 struct sk_buff_head *queue, in __ip_make_skb() argument
1481 struct rtable *rt = (struct rtable *)cork->dst; in __ip_make_skb()
1486 skb = __skb_dequeue(queue); in __ip_make_skb()
1489 tail_skb = &(skb_shinfo(skb)->frag_list); in __ip_make_skb()
1491 /* move skb->data to ip header from ext header */ in __ip_make_skb()
1492 if (skb->data < skb_network_header(skb)) in __ip_make_skb()
1494 while ((tmp_skb = __skb_dequeue(queue)) != NULL) { in __ip_make_skb()
1497 tail_skb = &(tmp_skb->next); in __ip_make_skb()
1498 skb->len += tmp_skb->len; in __ip_make_skb()
1499 skb->data_len += tmp_skb->len; in __ip_make_skb()
1500 skb->truesize += tmp_skb->truesize; in __ip_make_skb()
1501 tmp_skb->destructor = NULL; in __ip_make_skb()
1502 tmp_skb->sk = NULL; in __ip_make_skb()
1509 skb->ignore_df = ip_sk_ignore_df(sk); in __ip_make_skb()
1514 if (inet->pmtudisc == IP_PMTUDISC_DO || in __ip_make_skb()
1515 inet->pmtudisc == IP_PMTUDISC_PROBE || in __ip_make_skb()
1516 (skb->len <= dst_mtu(&rt->dst) && in __ip_make_skb()
1517 ip_dont_fragment(sk, &rt->dst))) in __ip_make_skb()
1520 if (cork->flags & IPCORK_OPT) in __ip_make_skb()
1521 opt = cork->opt; in __ip_make_skb()
1523 if (cork->ttl != 0) in __ip_make_skb()
1524 ttl = cork->ttl; in __ip_make_skb()
1525 else if (rt->rt_type == RTN_MULTICAST) in __ip_make_skb()
1526 ttl = inet->mc_ttl; in __ip_make_skb()
1528 ttl = ip_select_ttl(inet, &rt->dst); in __ip_make_skb()
1531 iph->version = 4; in __ip_make_skb()
1532 iph->ihl = 5; in __ip_make_skb()
1533 iph->tos = (cork->tos != -1) ? cork->tos : inet->tos; in __ip_make_skb()
1534 iph->frag_off = df; in __ip_make_skb()
1535 iph->ttl = ttl; in __ip_make_skb()
1536 iph->protocol = sk->sk_protocol; in __ip_make_skb()
1541 iph->ihl += opt->optlen >> 2; in __ip_make_skb()
1542 ip_options_build(skb, opt, cork->addr, rt, 0); in __ip_make_skb()
1545 skb->priority = (cork->tos != -1) ? cork->priority: sk->sk_priority; in __ip_make_skb()
1546 skb->mark = cork->mark; in __ip_make_skb()
1547 skb->tstamp = cork->transmit_time; in __ip_make_skb()
1552 cork->dst = NULL; in __ip_make_skb()
1553 skb_dst_set(skb, &rt->dst); in __ip_make_skb()
1555 if (iph->protocol == IPPROTO_ICMP) in __ip_make_skb()
1557 skb_transport_header(skb))->type); in __ip_make_skb()
1568 err = ip_local_out(net, skb->sk, skb); in ip_send_skb()
1595 struct sk_buff_head *queue, in __ip_flush_pending_frames() argument
1600 while ((skb = __skb_dequeue_tail(queue)) != NULL) in __ip_flush_pending_frames()
1608 __ip_flush_pending_frames(sk, &sk->sk_write_queue, &inet_sk(sk)->cork.base); in ip_flush_pending_frames()
1619 struct sk_buff_head queue; in ip_make_skb() local
1625 __skb_queue_head_init(&queue); in ip_make_skb()
1627 cork->flags = 0; in ip_make_skb()
1628 cork->addr = 0; in ip_make_skb()
1629 cork->opt = NULL; in ip_make_skb()
1634 err = __ip_append_data(sk, fl4, &queue, cork, in ip_make_skb()
1635 ¤t->task_frag, getfrag, in ip_make_skb()
1638 __ip_flush_pending_frames(sk, &queue, cork); in ip_make_skb()
1642 return __ip_make_skb(sk, fl4, &queue, cork); in ip_make_skb()
1654 skb->csum = csum_block_add(skb->csum, csum, odd); in ip_reply_glue_bits()
1691 oif = arg->bound_dev_if; in ip_send_unicast_reply()
1692 if (!oif && netif_index_is_l3_master(net, skb->skb_iif)) in ip_send_unicast_reply()
1693 oif = skb->skb_iif; in ip_send_unicast_reply()
1696 IP4_REPLY_MARK(net, skb->mark) ?: sk->sk_mark, in ip_send_unicast_reply()
1697 RT_TOS(arg->tos), in ip_send_unicast_reply()
1698 RT_SCOPE_UNIVERSE, ip_hdr(skb)->protocol, in ip_send_unicast_reply()
1701 tcp_hdr(skb)->source, tcp_hdr(skb)->dest, in ip_send_unicast_reply()
1702 arg->uid); in ip_send_unicast_reply()
1708 inet_sk(sk)->tos = arg->tos & ~INET_ECN_MASK; in ip_send_unicast_reply()
1710 sk->sk_protocol = ip_hdr(skb)->protocol; in ip_send_unicast_reply()
1711 sk->sk_bound_dev_if = arg->bound_dev_if; in ip_send_unicast_reply()
1712 sk->sk_sndbuf = sysctl_wmem_default; in ip_send_unicast_reply()
1714 err = ip_append_data(sk, &fl4, ip_reply_glue_bits, arg->iov->iov_base, in ip_send_unicast_reply()
1721 nskb = skb_peek(&sk->sk_write_queue); in ip_send_unicast_reply()
1723 if (arg->csumoffset >= 0) in ip_send_unicast_reply()
1725 arg->csumoffset) = csum_fold(csum_add(nskb->csum, in ip_send_unicast_reply()
1726 arg->csum)); in ip_send_unicast_reply()
1727 nskb->ip_summed = CHECKSUM_NONE; in ip_send_unicast_reply()