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kernel: update pppoe patch
Use the patch version accepted upstream and move it to backports dir. Signed-off-by: Qingfang Deng <dqfext@gmail.com> Signed-off-by: Robert Marko <robimarko@gmail.com>
This commit is contained in:
Qingfang Deng
@@ -1,6 +1,7 @@
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From 55a5d8fca8365312ed53bc93ae1af67ee35c2915 Mon Sep 17 00:00:00 2001
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From: Felix Fietkau <nbd@nbd.name>
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Date: Tue, 15 Jul 2025 12:37:45 +0200
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Subject: [PATCH] net: pppoe: implement GRO support
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Date: Wed, 13 May 2026 09:33:48 +0800
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Subject: [PATCH] net: pppoe: implement GRO/GSO support
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Only handles packets where the pppoe header length field matches the exact
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packet length. Significantly improves rx throughput.
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@@ -11,7 +12,15 @@ that the device is able to handle improves from ~130 Mbit/s to ~630 Mbit/s,
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using fraglist GRO.
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Signed-off-by: Felix Fietkau <nbd@nbd.name>
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Signed-off-by: Qingfang Deng <qingfang.deng@linux.dev>
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Tested-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Link: https://patch.msgid.link/20260513013400.7467-1-qingfang.deng@linux.dev
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Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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---
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drivers/net/ppp/pppoe.c | 161 +++++++++++++++++++++++++++++++++++++++-
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net/ipv4/af_inet.c | 2 +
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net/ipv6/ip6_offload.c | 2 +
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3 files changed, 164 insertions(+), 1 deletion(-)
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--- a/drivers/net/ppp/pppoe.c
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+++ b/drivers/net/ppp/pppoe.c
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@@ -32,28 +41,34 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
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goto drop;
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ph = pppoe_hdr(skb);
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@@ -1173,6 +1174,161 @@ static struct pernet_operations pppoe_ne
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@@ -1176,6 +1177,160 @@ static struct pernet_operations pppoe_ne
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.size = sizeof(struct pppoe_net),
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};
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+static u16
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+compare_pppoe_header(struct pppoe_hdr *phdr, struct pppoe_hdr *phdr2)
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+compare_pppoe_header(const struct pppoe_hdr *phdr,
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+ const struct pppoe_hdr *phdr2)
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+{
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+ return (__force __u16)((phdr->sid ^ phdr2->sid) |
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+ (phdr->tag[0].tag_type ^ phdr2->tag[0].tag_type));
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+ __be16 proto = *(const __be16 *)(phdr + 1);
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+ __be16 proto2 = *(const __be16 *)(phdr2 + 1);
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+
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+ return (__force u16)((phdr->sid ^ phdr2->sid) | (proto ^ proto2));
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+}
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+
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+static __be16 pppoe_hdr_proto(struct pppoe_hdr *phdr)
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+static __be16 pppoe_hdr_proto(const struct pppoe_hdr *phdr)
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+{
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+ switch (phdr->tag[0].tag_type) {
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+ __be16 proto = *(const __be16 *)(phdr + 1);
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+
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+ switch (proto) {
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+ case cpu_to_be16(PPP_IP):
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+ return cpu_to_be16(ETH_P_IP);
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+#if IS_ENABLED(CONFIG_IPV6)
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+ case cpu_to_be16(PPP_IPV6):
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+ return cpu_to_be16(ETH_P_IPV6);
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+#endif
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+ default:
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+ return 0;
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+ }
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+
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+}
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+
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+static struct sk_buff *pppoe_gro_receive(struct list_head *head,
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@@ -61,26 +76,27 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
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+{
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+ const struct packet_offload *ptype;
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+ unsigned int hlen, off_pppoe;
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+ const struct pppoe_hdr *phdr;
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+ struct sk_buff *pp = NULL;
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+ struct pppoe_hdr *phdr;
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+ struct sk_buff *p;
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+ int flush = 1;
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+ __be16 type;
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+
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+ off_pppoe = skb_gro_offset(skb);
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+ hlen = off_pppoe + sizeof(*phdr);
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+ phdr = skb_gro_header(skb, hlen + 2, off_pppoe);
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+ hlen = off_pppoe + PPPOE_SES_HLEN;
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+ phdr = skb_gro_header(skb, hlen, off_pppoe);
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+ if (unlikely(!phdr))
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+ goto out;
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+
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+ /* filter for session packets (type:1, ver:1, code:0) */
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+ if (*(const __be16 *)phdr != cpu_to_be16(0x1100))
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+ goto out;
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+
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+ /* ignore packets with padding or invalid length */
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+ if (skb_gro_len(skb) != be16_to_cpu(phdr->length) + hlen)
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+ if (skb_gro_len(skb) != be16_to_cpu(phdr->length) + sizeof(*phdr))
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+ goto out;
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+
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+ type = pppoe_hdr_proto(phdr);
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+ if (!type)
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+ goto out;
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+
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+ ptype = gro_find_receive_by_type(type);
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+ if (!ptype)
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+ goto out;
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@@ -88,18 +104,18 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
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+ flush = 0;
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+
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+ list_for_each_entry(p, head, list) {
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+ struct pppoe_hdr *phdr2;
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+ const struct pppoe_hdr *phdr2;
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+
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+ if (!NAPI_GRO_CB(p)->same_flow)
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+ continue;
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+
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+ phdr2 = (struct pppoe_hdr *)(p->data + off_pppoe);
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+ phdr2 = (const struct pppoe_hdr *)(p->data + off_pppoe);
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+ if (compare_pppoe_header(phdr, phdr2))
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+ NAPI_GRO_CB(p)->same_flow = 0;
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+ }
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+
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+ skb_gro_pull(skb, sizeof(*phdr) + 2);
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+ skb_gro_postpull_rcsum(skb, phdr, sizeof(*phdr) + 2);
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+ skb_gro_pull(skb, PPPOE_SES_HLEN);
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+ skb_gro_postpull_rcsum(skb, phdr, PPPOE_SES_HLEN);
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+
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+ pp = indirect_call_gro_receive_inet(ptype->callbacks.gro_receive,
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+ ipv6_gro_receive, inet_gro_receive,
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@@ -116,32 +132,26 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
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+ struct pppoe_hdr *phdr = (struct pppoe_hdr *)(skb->data + nhoff);
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+ __be16 type = pppoe_hdr_proto(phdr);
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+ struct packet_offload *ptype;
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+ int len, err;
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+ unsigned int len;
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+
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+ ptype = gro_find_complete_by_type(type);
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+ if (!ptype)
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+ return -ENOENT;
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+
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+ err = INDIRECT_CALL_INET(ptype->callbacks.gro_complete,
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+ ipv6_gro_complete, inet_gro_complete,
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+ skb, nhoff + sizeof(*phdr) + 2);
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+ if (err)
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+ return err;
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+
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+ len = skb->len - (nhoff + sizeof(*phdr));
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+ len = min(len, 0xFFFFU);
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+ phdr->length = cpu_to_be16(len);
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+
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+ return 0;
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+ return INDIRECT_CALL_INET(ptype->callbacks.gro_complete,
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+ ipv6_gro_complete, inet_gro_complete,
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+ skb, nhoff + PPPOE_SES_HLEN);
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+}
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+
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+static struct sk_buff *pppoe_gso_segment(struct sk_buff *skb,
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+ netdev_features_t features)
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+{
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+ unsigned int pppoe_hlen = sizeof(struct pppoe_hdr) + 2;
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+ struct sk_buff *segs = ERR_PTR(-EINVAL);
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+ u16 mac_offset = skb->mac_header;
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+ struct packet_offload *ptype;
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+ u16 mac_len = skb->mac_len;
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+ struct pppoe_hdr *phdr;
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+ __be16 orig_type, type;
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+ int len, nhoff;
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@@ -149,7 +159,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
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+ skb_reset_network_header(skb);
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+ nhoff = skb_network_header(skb) - skb_mac_header(skb);
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+
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+ if (unlikely(!pskb_may_pull(skb, pppoe_hlen)))
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+ if (unlikely(!pskb_may_pull(skb, PPPOE_SES_HLEN)))
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+ goto out;
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+
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+ phdr = (struct pppoe_hdr *)skb_network_header(skb);
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@@ -159,13 +169,11 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
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+ goto out;
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+
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+ orig_type = skb->protocol;
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+ __skb_pull(skb, pppoe_hlen);
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+ __skb_pull(skb, PPPOE_SES_HLEN);
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+ features &= ~NETIF_F_GSO_SOFTWARE;
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+ segs = ptype->callbacks.gso_segment(skb, features);
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+ if (IS_ERR_OR_NULL(segs)) {
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+ skb_gso_error_unwind(skb, orig_type, pppoe_hlen, mac_offset,
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+ mac_len);
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+ if (IS_ERR_OR_NULL(segs))
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+ goto out;
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+ }
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+
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+ skb = segs;
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+ do {
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@@ -194,19 +202,21 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
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static int __init pppoe_init(void)
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{
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int err;
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@@ -1189,6 +1345,7 @@ static int __init pppoe_init(void)
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@@ -1192,6 +1347,8 @@ static int __init pppoe_init(void)
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if (err)
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goto out_unregister_pppoe_proto;
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+ dev_add_offload(&pppoe_packet_offload);
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+ if (IS_ENABLED(CONFIG_INET))
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+ dev_add_offload(&pppoe_packet_offload);
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dev_add_pack(&pppoes_ptype);
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dev_add_pack(&pppoed_ptype);
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register_netdevice_notifier(&pppoe_notifier);
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@@ -1208,6 +1365,7 @@ static void __exit pppoe_exit(void)
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@@ -1211,6 +1368,8 @@ static void __exit pppoe_exit(void)
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unregister_netdevice_notifier(&pppoe_notifier);
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dev_remove_pack(&pppoed_ptype);
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dev_remove_pack(&pppoes_ptype);
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+ dev_remove_offload(&pppoe_packet_offload);
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+ if (IS_ENABLED(CONFIG_INET))
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+ dev_remove_offload(&pppoe_packet_offload);
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unregister_pppox_proto(PX_PROTO_OE);
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proto_unregister(&pppoe_sk_proto);
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unregister_pernet_device(&pppoe_net_ops);
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@@ -1,6 +1,7 @@
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From 55a5d8fca8365312ed53bc93ae1af67ee35c2915 Mon Sep 17 00:00:00 2001
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From: Felix Fietkau <nbd@nbd.name>
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Date: Tue, 15 Jul 2025 12:37:45 +0200
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Subject: [PATCH] net: pppoe: implement GRO support
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Date: Wed, 13 May 2026 09:33:48 +0800
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Subject: [PATCH] net: pppoe: implement GRO/GSO support
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Only handles packets where the pppoe header length field matches the exact
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packet length. Significantly improves rx throughput.
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@@ -11,7 +12,15 @@ that the device is able to handle improves from ~130 Mbit/s to ~630 Mbit/s,
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using fraglist GRO.
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Signed-off-by: Felix Fietkau <nbd@nbd.name>
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Signed-off-by: Qingfang Deng <qingfang.deng@linux.dev>
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Tested-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Link: https://patch.msgid.link/20260513013400.7467-1-qingfang.deng@linux.dev
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Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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---
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drivers/net/ppp/pppoe.c | 161 +++++++++++++++++++++++++++++++++++++++-
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net/ipv4/af_inet.c | 2 +
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net/ipv6/ip6_offload.c | 2 +
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3 files changed, 164 insertions(+), 1 deletion(-)
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--- a/drivers/net/ppp/pppoe.c
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+++ b/drivers/net/ppp/pppoe.c
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@@ -32,28 +41,34 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
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goto drop;
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ph = pppoe_hdr(skb);
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@@ -1176,6 +1177,161 @@ static struct pernet_operations pppoe_ne
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@@ -1176,6 +1177,160 @@ static struct pernet_operations pppoe_ne
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.size = sizeof(struct pppoe_net),
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};
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+static u16
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+compare_pppoe_header(struct pppoe_hdr *phdr, struct pppoe_hdr *phdr2)
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+compare_pppoe_header(const struct pppoe_hdr *phdr,
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+ const struct pppoe_hdr *phdr2)
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+{
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+ return (__force __u16)((phdr->sid ^ phdr2->sid) |
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+ (phdr->tag[0].tag_type ^ phdr2->tag[0].tag_type));
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+ __be16 proto = *(const __be16 *)(phdr + 1);
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+ __be16 proto2 = *(const __be16 *)(phdr2 + 1);
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+
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+ return (__force u16)((phdr->sid ^ phdr2->sid) | (proto ^ proto2));
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+}
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+
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+static __be16 pppoe_hdr_proto(struct pppoe_hdr *phdr)
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+static __be16 pppoe_hdr_proto(const struct pppoe_hdr *phdr)
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+{
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+ switch (phdr->tag[0].tag_type) {
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+ __be16 proto = *(const __be16 *)(phdr + 1);
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+
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+ switch (proto) {
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+ case cpu_to_be16(PPP_IP):
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+ return cpu_to_be16(ETH_P_IP);
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+#if IS_ENABLED(CONFIG_IPV6)
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+ case cpu_to_be16(PPP_IPV6):
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+ return cpu_to_be16(ETH_P_IPV6);
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+#endif
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+ default:
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+ return 0;
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+ }
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+
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+}
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+
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+static struct sk_buff *pppoe_gro_receive(struct list_head *head,
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@@ -61,26 +76,27 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
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+{
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+ const struct packet_offload *ptype;
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+ unsigned int hlen, off_pppoe;
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+ const struct pppoe_hdr *phdr;
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+ struct sk_buff *pp = NULL;
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+ struct pppoe_hdr *phdr;
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+ struct sk_buff *p;
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+ int flush = 1;
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+ __be16 type;
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+
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+ off_pppoe = skb_gro_offset(skb);
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+ hlen = off_pppoe + sizeof(*phdr);
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+ phdr = skb_gro_header(skb, hlen + 2, off_pppoe);
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+ hlen = off_pppoe + PPPOE_SES_HLEN;
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+ phdr = skb_gro_header(skb, hlen, off_pppoe);
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+ if (unlikely(!phdr))
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+ goto out;
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+
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+ /* filter for session packets (type:1, ver:1, code:0) */
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+ if (*(const __be16 *)phdr != cpu_to_be16(0x1100))
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+ goto out;
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+
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+ /* ignore packets with padding or invalid length */
|
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+ if (skb_gro_len(skb) != be16_to_cpu(phdr->length) + hlen)
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+ if (skb_gro_len(skb) != be16_to_cpu(phdr->length) + sizeof(*phdr))
|
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+ goto out;
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+
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+ type = pppoe_hdr_proto(phdr);
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+ if (!type)
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+ goto out;
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+
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+ ptype = gro_find_receive_by_type(type);
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+ if (!ptype)
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+ goto out;
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@@ -88,18 +104,18 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
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+ flush = 0;
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+
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+ list_for_each_entry(p, head, list) {
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+ struct pppoe_hdr *phdr2;
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+ const struct pppoe_hdr *phdr2;
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+
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+ if (!NAPI_GRO_CB(p)->same_flow)
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+ continue;
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+
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+ phdr2 = (struct pppoe_hdr *)(p->data + off_pppoe);
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+ phdr2 = (const struct pppoe_hdr *)(p->data + off_pppoe);
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+ if (compare_pppoe_header(phdr, phdr2))
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+ NAPI_GRO_CB(p)->same_flow = 0;
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+ }
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+
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+ skb_gro_pull(skb, sizeof(*phdr) + 2);
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+ skb_gro_postpull_rcsum(skb, phdr, sizeof(*phdr) + 2);
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+ skb_gro_pull(skb, PPPOE_SES_HLEN);
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+ skb_gro_postpull_rcsum(skb, phdr, PPPOE_SES_HLEN);
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+
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+ pp = indirect_call_gro_receive_inet(ptype->callbacks.gro_receive,
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+ ipv6_gro_receive, inet_gro_receive,
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@@ -116,32 +132,26 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
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+ struct pppoe_hdr *phdr = (struct pppoe_hdr *)(skb->data + nhoff);
|
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+ __be16 type = pppoe_hdr_proto(phdr);
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+ struct packet_offload *ptype;
|
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+ int len, err;
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+ unsigned int len;
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+
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+ ptype = gro_find_complete_by_type(type);
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+ if (!ptype)
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+ return -ENOENT;
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+
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+ err = INDIRECT_CALL_INET(ptype->callbacks.gro_complete,
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+ ipv6_gro_complete, inet_gro_complete,
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+ skb, nhoff + sizeof(*phdr) + 2);
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+ if (err)
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+ return err;
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+
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+ len = skb->len - (nhoff + sizeof(*phdr));
|
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+ len = min(len, 0xFFFFU);
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+ phdr->length = cpu_to_be16(len);
|
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+
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+ return 0;
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+ return INDIRECT_CALL_INET(ptype->callbacks.gro_complete,
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+ ipv6_gro_complete, inet_gro_complete,
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+ skb, nhoff + PPPOE_SES_HLEN);
|
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+}
|
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+
|
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+static struct sk_buff *pppoe_gso_segment(struct sk_buff *skb,
|
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+ netdev_features_t features)
|
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+{
|
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+ unsigned int pppoe_hlen = sizeof(struct pppoe_hdr) + 2;
|
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+ struct sk_buff *segs = ERR_PTR(-EINVAL);
|
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+ u16 mac_offset = skb->mac_header;
|
||||
+ struct packet_offload *ptype;
|
||||
+ u16 mac_len = skb->mac_len;
|
||||
+ struct pppoe_hdr *phdr;
|
||||
+ __be16 orig_type, type;
|
||||
+ int len, nhoff;
|
||||
@@ -149,7 +159,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
|
||||
+ skb_reset_network_header(skb);
|
||||
+ nhoff = skb_network_header(skb) - skb_mac_header(skb);
|
||||
+
|
||||
+ if (unlikely(!pskb_may_pull(skb, pppoe_hlen)))
|
||||
+ if (unlikely(!pskb_may_pull(skb, PPPOE_SES_HLEN)))
|
||||
+ goto out;
|
||||
+
|
||||
+ phdr = (struct pppoe_hdr *)skb_network_header(skb);
|
||||
@@ -159,13 +169,11 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
|
||||
+ goto out;
|
||||
+
|
||||
+ orig_type = skb->protocol;
|
||||
+ __skb_pull(skb, pppoe_hlen);
|
||||
+ __skb_pull(skb, PPPOE_SES_HLEN);
|
||||
+ features &= ~NETIF_F_GSO_SOFTWARE;
|
||||
+ segs = ptype->callbacks.gso_segment(skb, features);
|
||||
+ if (IS_ERR_OR_NULL(segs)) {
|
||||
+ skb_gso_error_unwind(skb, orig_type, pppoe_hlen, mac_offset,
|
||||
+ mac_len);
|
||||
+ if (IS_ERR_OR_NULL(segs))
|
||||
+ goto out;
|
||||
+ }
|
||||
+
|
||||
+ skb = segs;
|
||||
+ do {
|
||||
@@ -194,19 +202,21 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
|
||||
static int __init pppoe_init(void)
|
||||
{
|
||||
int err;
|
||||
@@ -1192,6 +1348,7 @@ static int __init pppoe_init(void)
|
||||
@@ -1192,6 +1347,8 @@ static int __init pppoe_init(void)
|
||||
if (err)
|
||||
goto out_unregister_pppoe_proto;
|
||||
|
||||
+ dev_add_offload(&pppoe_packet_offload);
|
||||
+ if (IS_ENABLED(CONFIG_INET))
|
||||
+ dev_add_offload(&pppoe_packet_offload);
|
||||
dev_add_pack(&pppoes_ptype);
|
||||
dev_add_pack(&pppoed_ptype);
|
||||
register_netdevice_notifier(&pppoe_notifier);
|
||||
@@ -1211,6 +1368,7 @@ static void __exit pppoe_exit(void)
|
||||
@@ -1211,6 +1368,8 @@ static void __exit pppoe_exit(void)
|
||||
unregister_netdevice_notifier(&pppoe_notifier);
|
||||
dev_remove_pack(&pppoed_ptype);
|
||||
dev_remove_pack(&pppoes_ptype);
|
||||
+ dev_remove_offload(&pppoe_packet_offload);
|
||||
+ if (IS_ENABLED(CONFIG_INET))
|
||||
+ dev_remove_offload(&pppoe_packet_offload);
|
||||
unregister_pppox_proto(PX_PROTO_OE);
|
||||
proto_unregister(&pppoe_sk_proto);
|
||||
unregister_pernet_device(&pppoe_net_ops);
|
||||
Reference in New Issue
Block a user