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-rw-r--r--drivers/net/macvtap.c4
-rw-r--r--drivers/net/tun.c13
-rw-r--r--drivers/net/virtio_net.c13
-rw-r--r--include/linux/skbuff.h17
-rw-r--r--net/core/skbuff.c5
-rw-r--r--net/ipv4/af_inet.c1
-rw-r--r--net/ipv4/ip_output.c1
-rw-r--r--net/ipv4/tcp.c4
-rw-r--r--net/ipv4/tcp_input.c4
-rw-r--r--net/ipv4/tcp_output.c4
-rw-r--r--net/ipv6/ip6_offload.c1
11 files changed, 29 insertions, 38 deletions
diff --git a/drivers/net/macvtap.c b/drivers/net/macvtap.c
index b181dfb3d6d6..97243011d319 100644
--- a/drivers/net/macvtap.c
+++ b/drivers/net/macvtap.c
@@ -543,7 +543,6 @@ static int zerocopy_sg_from_iovec(struct sk_buff *skb, const struct iovec *from,
skb->data_len += len;
skb->len += len;
skb->truesize += truesize;
- skb_shinfo(skb)->gso_type |= SKB_GSO_SHARED_FRAG;
atomic_add(truesize, &skb->sk->sk_wmem_alloc);
while (len) {
int off = base & ~PAGE_MASK;
@@ -599,7 +598,7 @@ static int macvtap_skb_from_vnet_hdr(struct sk_buff *skb,
if (vnet_hdr->gso_type != VIRTIO_NET_HDR_GSO_NONE) {
skb_shinfo(skb)->gso_size = vnet_hdr->gso_size;
- skb_shinfo(skb)->gso_type |= gso_type;
+ skb_shinfo(skb)->gso_type = gso_type;
/* Header must be checked, and gso_segs computed. */
skb_shinfo(skb)->gso_type |= SKB_GSO_DODGY;
@@ -743,6 +742,7 @@ static ssize_t macvtap_get_user(struct macvtap_queue *q, struct msghdr *m,
if (zerocopy) {
skb_shinfo(skb)->destructor_arg = m->msg_control;
skb_shinfo(skb)->tx_flags |= SKBTX_DEV_ZEROCOPY;
+ skb_shinfo(skb)->tx_flags |= SKBTX_SHARED_FRAG;
}
if (vlan)
macvlan_start_xmit(skb, vlan->dev);
diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index b1038c0e2240..b6f45c5d84d5 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -1019,7 +1019,6 @@ static int zerocopy_sg_from_iovec(struct sk_buff *skb, const struct iovec *from,
skb->data_len += len;
skb->len += len;
skb->truesize += truesize;
- skb_shinfo(skb)->gso_type |= SKB_GSO_SHARED_FRAG;
atomic_add(truesize, &skb->sk->sk_wmem_alloc);
while (len) {
int off = base & ~PAGE_MASK;
@@ -1165,18 +1164,16 @@ static ssize_t tun_get_user(struct tun_struct *tun, struct tun_file *tfile,
}
if (gso.gso_type != VIRTIO_NET_HDR_GSO_NONE) {
- unsigned short gso_type = 0;
-
pr_debug("GSO!\n");
switch (gso.gso_type & ~VIRTIO_NET_HDR_GSO_ECN) {
case VIRTIO_NET_HDR_GSO_TCPV4:
- gso_type = SKB_GSO_TCPV4;
+ skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
break;
case VIRTIO_NET_HDR_GSO_TCPV6:
- gso_type = SKB_GSO_TCPV6;
+ skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
break;
case VIRTIO_NET_HDR_GSO_UDP:
- gso_type = SKB_GSO_UDP;
+ skb_shinfo(skb)->gso_type = SKB_GSO_UDP;
break;
default:
tun->dev->stats.rx_frame_errors++;
@@ -1185,10 +1182,9 @@ static ssize_t tun_get_user(struct tun_struct *tun, struct tun_file *tfile,
}
if (gso.gso_type & VIRTIO_NET_HDR_GSO_ECN)
- gso_type |= SKB_GSO_TCP_ECN;
+ skb_shinfo(skb)->gso_type |= SKB_GSO_TCP_ECN;
skb_shinfo(skb)->gso_size = gso.gso_size;
- skb_shinfo(skb)->gso_type |= gso_type;
if (skb_shinfo(skb)->gso_size == 0) {
tun->dev->stats.rx_frame_errors++;
kfree_skb(skb);
@@ -1204,6 +1200,7 @@ static ssize_t tun_get_user(struct tun_struct *tun, struct tun_file *tfile,
if (zerocopy) {
skb_shinfo(skb)->destructor_arg = msg_control;
skb_shinfo(skb)->tx_flags |= SKBTX_DEV_ZEROCOPY;
+ skb_shinfo(skb)->tx_flags |= SKBTX_SHARED_FRAG;
}
skb_reset_network_header(skb);
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index 381a2d8d8a81..192c91c8e799 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -227,7 +227,7 @@ static void set_skb_frag(struct sk_buff *skb, struct page *page,
skb->len += size;
skb->truesize += PAGE_SIZE;
skb_shinfo(skb)->nr_frags++;
- skb_shinfo(skb)->gso_type |= SKB_GSO_SHARED_FRAG;
+ skb_shinfo(skb)->tx_flags |= SKBTX_SHARED_FRAG;
*len -= size;
}
@@ -387,18 +387,16 @@ static void receive_buf(struct receive_queue *rq, void *buf, unsigned int len)
ntohs(skb->protocol), skb->len, skb->pkt_type);
if (hdr->hdr.gso_type != VIRTIO_NET_HDR_GSO_NONE) {
- unsigned short gso_type = 0;
-
pr_debug("GSO!\n");
switch (hdr->hdr.gso_type & ~VIRTIO_NET_HDR_GSO_ECN) {
case VIRTIO_NET_HDR_GSO_TCPV4:
- gso_type = SKB_GSO_TCPV4;
+ skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
break;
case VIRTIO_NET_HDR_GSO_UDP:
- gso_type = SKB_GSO_UDP;
+ skb_shinfo(skb)->gso_type = SKB_GSO_UDP;
break;
case VIRTIO_NET_HDR_GSO_TCPV6:
- gso_type = SKB_GSO_TCPV6;
+ skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
break;
default:
net_warn_ratelimited("%s: bad gso type %u.\n",
@@ -407,7 +405,7 @@ static void receive_buf(struct receive_queue *rq, void *buf, unsigned int len)
}
if (hdr->hdr.gso_type & VIRTIO_NET_HDR_GSO_ECN)
- gso_type |= SKB_GSO_TCP_ECN;
+ skb_shinfo(skb)->gso_type |= SKB_GSO_TCP_ECN;
skb_shinfo(skb)->gso_size = hdr->hdr.gso_size;
if (skb_shinfo(skb)->gso_size == 0) {
@@ -415,7 +413,6 @@ static void receive_buf(struct receive_queue *rq, void *buf, unsigned int len)
goto frame_err;
}
- skb_shinfo(skb)->gso_type |= gso_type;
/* Header must be checked, and gso_segs computed. */
skb_shinfo(skb)->gso_type |= SKB_GSO_DODGY;
skb_shinfo(skb)->gso_segs = 0;
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index d7573c37a51d..9da99520ccd5 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -230,6 +230,13 @@ enum {
/* generate wifi status information (where possible) */
SKBTX_WIFI_STATUS = 1 << 4,
+
+ /* This indicates at least one fragment might be overwritten
+ * (as in vmsplice(), sendfile() ...)
+ * If we need to compute a TX checksum, we'll need to copy
+ * all frags to avoid possible bad checksum
+ */
+ SKBTX_SHARED_FRAG = 1 << 5,
};
/*
@@ -307,13 +314,6 @@ enum {
SKB_GSO_TCPV6 = 1 << 4,
SKB_GSO_FCOE = 1 << 5,
-
- /* This indicates at least one fragment might be overwritten
- * (as in vmsplice(), sendfile() ...)
- * If we need to compute a TX checksum, we'll need to copy
- * all frags to avoid possible bad checksum
- */
- SKB_GSO_SHARED_FRAG = 1 << 6,
};
#if BITS_PER_LONG > 32
@@ -2220,7 +2220,8 @@ static inline int skb_linearize(struct sk_buff *skb)
*/
static inline bool skb_has_shared_frag(const struct sk_buff *skb)
{
- return skb_shinfo(skb)->gso_type & SKB_GSO_SHARED_FRAG;
+ return skb_is_nonlinear(skb) &&
+ skb_shinfo(skb)->tx_flags & SKBTX_SHARED_FRAG;
}
/**
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 21a22cce6e53..6c1ad09f8796 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -2326,8 +2326,7 @@ void skb_split(struct sk_buff *skb, struct sk_buff *skb1, const u32 len)
{
int pos = skb_headlen(skb);
- skb_shinfo(skb1)->gso_type = skb_shinfo(skb)->gso_type;
-
+ skb_shinfo(skb)->tx_flags = skb_shinfo(skb1)->tx_flags & SKBTX_SHARED_FRAG;
if (len < pos) /* Split line is inside header. */
skb_split_inside_header(skb, skb1, len, pos);
else /* Second chunk has no header, nothing to copy. */
@@ -2833,7 +2832,7 @@ struct sk_buff *skb_segment(struct sk_buff *skb, netdev_features_t features)
skb_copy_from_linear_data_offset(skb, offset,
skb_put(nskb, hsize), hsize);
- skb_shinfo(nskb)->gso_type = skb_shinfo(skb)->gso_type;
+ skb_shinfo(nskb)->tx_flags = skb_shinfo(skb)->tx_flags & SKBTX_SHARED_FRAG;
while (pos < offset + len && i < nfrags) {
*frag = skb_shinfo(skb)->frags[i];
diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index 1aec92bf8018..e6e5d8506336 100644
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -1287,7 +1287,6 @@ static struct sk_buff *inet_gso_segment(struct sk_buff *skb,
SKB_GSO_UDP |
SKB_GSO_DODGY |
SKB_GSO_TCP_ECN |
- SKB_GSO_SHARED_FRAG |
0)))
goto out;
diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c
index 3e98ed2bff55..5e12dca7b3dd 100644
--- a/net/ipv4/ip_output.c
+++ b/net/ipv4/ip_output.c
@@ -598,6 +598,7 @@ slow_path:
/* for offloaded checksums cleanup checksum before fragmentation */
if ((skb->ip_summed == CHECKSUM_PARTIAL) && skb_checksum_help(skb))
goto fail;
+ iph = ip_hdr(skb);
left = skb->len - hlen; /* Space per frame */
ptr = hlen; /* Where to start from */
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 801b07b796f0..1f0bedb8622f 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -897,8 +897,7 @@ new_segment:
get_page(page);
skb_fill_page_desc(skb, i, page, offset, copy);
}
-
- skb_shinfo(skb)->gso_type |= SKB_GSO_SHARED_FRAG;
+ skb_shinfo(skb)->tx_flags |= SKBTX_SHARED_FRAG;
skb->len += copy;
skb->data_len += copy;
@@ -3044,7 +3043,6 @@ struct sk_buff *tcp_tso_segment(struct sk_buff *skb,
SKB_GSO_DODGY |
SKB_GSO_TCP_ECN |
SKB_GSO_TCPV6 |
- SKB_GSO_SHARED_FRAG |
0) ||
!(type & (SKB_GSO_TCPV4 | SKB_GSO_TCPV6))))
goto out;
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index d9bfaea34322..a759e19496d2 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -1239,13 +1239,13 @@ static bool tcp_shifted_skb(struct sock *sk, struct sk_buff *skb,
*/
if (!skb_shinfo(prev)->gso_size) {
skb_shinfo(prev)->gso_size = mss;
- skb_shinfo(prev)->gso_type |= sk->sk_gso_type;
+ skb_shinfo(prev)->gso_type = sk->sk_gso_type;
}
/* CHECKME: To clear or not to clear? Mimics normal skb currently */
if (skb_shinfo(skb)->gso_segs <= 1) {
skb_shinfo(skb)->gso_size = 0;
- skb_shinfo(skb)->gso_type &= SKB_GSO_SHARED_FRAG;
+ skb_shinfo(skb)->gso_type = 0;
}
/* Difference in this won't matter, both ACKed by the same cumul. ACK */
diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index 564bf89d9fd3..6182d90e97b0 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -1133,7 +1133,6 @@ static void tcp_queue_skb(struct sock *sk, struct sk_buff *skb)
static void tcp_set_skb_tso_segs(const struct sock *sk, struct sk_buff *skb,
unsigned int mss_now)
{
- skb_shinfo(skb)->gso_type &= SKB_GSO_SHARED_FRAG;
if (skb->len <= mss_now || !sk_can_gso(sk) ||
skb->ip_summed == CHECKSUM_NONE) {
/* Avoid the costly divide in the normal
@@ -1141,10 +1140,11 @@ static void tcp_set_skb_tso_segs(const struct sock *sk, struct sk_buff *skb,
*/
skb_shinfo(skb)->gso_segs = 1;
skb_shinfo(skb)->gso_size = 0;
+ skb_shinfo(skb)->gso_type = 0;
} else {
skb_shinfo(skb)->gso_segs = DIV_ROUND_UP(skb->len, mss_now);
skb_shinfo(skb)->gso_size = mss_now;
- skb_shinfo(skb)->gso_type |= sk->sk_gso_type;
+ skb_shinfo(skb)->gso_type = sk->sk_gso_type;
}
}
diff --git a/net/ipv6/ip6_offload.c b/net/ipv6/ip6_offload.c
index d141fc32a2ea..f26f0da7f095 100644
--- a/net/ipv6/ip6_offload.c
+++ b/net/ipv6/ip6_offload.c
@@ -100,7 +100,6 @@ static struct sk_buff *ipv6_gso_segment(struct sk_buff *skb,
SKB_GSO_DODGY |
SKB_GSO_TCP_ECN |
SKB_GSO_TCPV6 |
- SKB_GSO_SHARED_FRAG |
0)))
goto out;
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.