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Diffstat (limited to 'net/ipv4/ip_output.c')
-rw-r--r--net/ipv4/ip_output.c170
1 files changed, 26 insertions, 144 deletions
diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c
index 61892268e8a6..6e70839257f7 100644
--- a/net/ipv4/ip_output.c
+++ b/net/ipv4/ip_output.c
@@ -73,6 +73,7 @@
#include <net/arp.h>
#include <net/icmp.h>
#include <net/checksum.h>
+#include <net/gso.h>
#include <net/inetpeer.h>
#include <net/inet_ecn.h>
#include <net/lwtunnel.h>
@@ -946,17 +947,6 @@ ip_generic_getfrag(void *from, char *to, int offset, int len, int odd, struct sk
}
EXPORT_SYMBOL(ip_generic_getfrag);
-static inline __wsum
-csum_page(struct page *page, int offset, int copy)
-{
- char *kaddr;
- __wsum csum;
- kaddr = kmap(page);
- csum = csum_partial(kaddr + offset, copy, 0);
- kunmap(page);
- return csum;
-}
-
static int __ip_append_data(struct sock *sk,
struct flowi4 *fl4,
struct sk_buff_head *queue,
@@ -1048,6 +1038,15 @@ static int __ip_append_data(struct sock *sk,
skb_zcopy_set(skb, uarg, &extra_uref);
}
}
+ } else if ((flags & MSG_SPLICE_PAGES) && length) {
+ if (inet->hdrincl)
+ return -EPERM;
+ if (rt->dst.dev->features & NETIF_F_SG &&
+ getfrag == ip_generic_getfrag)
+ /* We need an empty buffer to attach stuff to */
+ paged = true;
+ else
+ flags &= ~MSG_SPLICE_PAGES;
}
cork->length += length;
@@ -1207,6 +1206,15 @@ alloc_new_skb:
err = -EFAULT;
goto error;
}
+ } else if (flags & MSG_SPLICE_PAGES) {
+ struct msghdr *msg = from;
+
+ err = skb_splice_from_iter(skb, &msg->msg_iter, copy,
+ sk->sk_allocation);
+ if (err < 0)
+ goto error;
+ copy = err;
+ wmem_alloc_delta += copy;
} else if (!zc) {
int i = skb_shinfo(skb)->nr_frags;
@@ -1310,10 +1318,10 @@ static int ip_setup_cork(struct sock *sk, struct inet_cork *cork,
}
/*
- * ip_append_data() and ip_append_page() can make one large IP datagram
- * from many pieces of data. Each pieces will be holded on the socket
- * until ip_push_pending_frames() is called. Each piece can be a page
- * or non-page data.
+ * ip_append_data() can make one large IP datagram from many pieces of
+ * data. Each piece will be held on the socket until
+ * ip_push_pending_frames() is called. Each piece can be a page or
+ * non-page data.
*
* Not only UDP, other transport protocols - e.g. raw sockets - can use
* this interface potentially.
@@ -1346,134 +1354,6 @@ int ip_append_data(struct sock *sk, struct flowi4 *fl4,
from, length, transhdrlen, flags);
}
-ssize_t ip_append_page(struct sock *sk, struct flowi4 *fl4, struct page *page,
- int offset, size_t size, int flags)
-{
- struct inet_sock *inet = inet_sk(sk);
- struct sk_buff *skb;
- struct rtable *rt;
- struct ip_options *opt = NULL;
- struct inet_cork *cork;
- int hh_len;
- int mtu;
- int len;
- int err;
- unsigned int maxfraglen, fragheaderlen, fraggap, maxnonfragsize;
-
- if (inet->hdrincl)
- return -EPERM;
-
- if (flags&MSG_PROBE)
- return 0;
-
- if (skb_queue_empty(&sk->sk_write_queue))
- return -EINVAL;
-
- cork = &inet->cork.base;
- rt = (struct rtable *)cork->dst;
- if (cork->flags & IPCORK_OPT)
- opt = cork->opt;
-
- if (!(rt->dst.dev->features & NETIF_F_SG))
- return -EOPNOTSUPP;
-
- hh_len = LL_RESERVED_SPACE(rt->dst.dev);
- mtu = cork->gso_size ? IP_MAX_MTU : cork->fragsize;
-
- fragheaderlen = sizeof(struct iphdr) + (opt ? opt->optlen : 0);
- maxfraglen = ((mtu - fragheaderlen) & ~7) + fragheaderlen;
- maxnonfragsize = ip_sk_ignore_df(sk) ? 0xFFFF : mtu;
-
- if (cork->length + size > maxnonfragsize - fragheaderlen) {
- ip_local_error(sk, EMSGSIZE, fl4->daddr, inet->inet_dport,
- mtu - (opt ? opt->optlen : 0));
- return -EMSGSIZE;
- }
-
- skb = skb_peek_tail(&sk->sk_write_queue);
- if (!skb)
- return -EINVAL;
-
- cork->length += size;
-
- while (size > 0) {
- /* Check if the remaining data fits into current packet. */
- len = mtu - skb->len;
- if (len < size)
- len = maxfraglen - skb->len;
-
- if (len <= 0) {
- struct sk_buff *skb_prev;
- int alloclen;
-
- skb_prev = skb;
- fraggap = skb_prev->len - maxfraglen;
-
- alloclen = fragheaderlen + hh_len + fraggap + 15;
- skb = sock_wmalloc(sk, alloclen, 1, sk->sk_allocation);
- if (unlikely(!skb)) {
- err = -ENOBUFS;
- goto error;
- }
-
- /*
- * Fill in the control structures
- */
- skb->ip_summed = CHECKSUM_NONE;
- skb->csum = 0;
- skb_reserve(skb, hh_len);
-
- /*
- * Find where to start putting bytes.
- */
- skb_put(skb, fragheaderlen + fraggap);
- skb_reset_network_header(skb);
- skb->transport_header = (skb->network_header +
- fragheaderlen);
- if (fraggap) {
- skb->csum = skb_copy_and_csum_bits(skb_prev,
- maxfraglen,
- skb_transport_header(skb),
- fraggap);
- skb_prev->csum = csum_sub(skb_prev->csum,
- skb->csum);
- pskb_trim_unique(skb_prev, maxfraglen);
- }
-
- /*
- * Put the packet on the pending queue.
- */
- __skb_queue_tail(&sk->sk_write_queue, skb);
- continue;
- }
-
- if (len > size)
- len = size;
-
- if (skb_append_pagefrags(skb, page, offset, len)) {
- err = -EMSGSIZE;
- goto error;
- }
-
- if (skb->ip_summed == CHECKSUM_NONE) {
- __wsum csum;
- csum = csum_page(page, offset, len);
- skb->csum = csum_block_add(skb->csum, csum, skb->len);
- }
-
- skb_len_add(skb, len);
- refcount_add(len, &sk->sk_wmem_alloc);
- offset += len;
- size -= len;
- }
- return 0;
-
-error:
- cork->length -= size;
- IP_INC_STATS(sock_net(sk), IPSTATS_MIB_OUTDISCARDS);
- return err;
-}
-
static void ip_cork_release(struct inet_cork *cork)
{
cork->flags &= ~IPCORK_OPT;
@@ -1692,7 +1572,7 @@ void ip_send_unicast_reply(struct sock *sk, struct sk_buff *skb,
const struct ip_options *sopt,
__be32 daddr, __be32 saddr,
const struct ip_reply_arg *arg,
- unsigned int len, u64 transmit_time)
+ unsigned int len, u64 transmit_time, u32 txhash)
{
struct ip_options_data replyopts;
struct ipcm_cookie ipc;
@@ -1755,6 +1635,8 @@ void ip_send_unicast_reply(struct sock *sk, struct sk_buff *skb,
arg->csum));
nskb->ip_summed = CHECKSUM_NONE;
nskb->mono_delivery_time = !!transmit_time;
+ if (txhash)
+ skb_set_hash(nskb, txhash, PKT_HASH_TYPE_L4);
ip_push_pending_frames(sk, &fl4);
}
out:
generated by cgit v1.2.3 (git 2.39.0) at 2025-02-15 05:15:02 +0300