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-rw-r--r--drivers/net/bnx2.c2
-rw-r--r--drivers/net/loopback.c67
-rw-r--r--drivers/net/tun.c105
3 files changed, 102 insertions, 72 deletions
diff --git a/drivers/net/bnx2.c b/drivers/net/bnx2.c
index d4548101e495..2486a656f12d 100644
--- a/drivers/net/bnx2.c
+++ b/drivers/net/bnx2.c
@@ -35,8 +35,8 @@
#include <linux/time.h>
#include <linux/ethtool.h>
#include <linux/mii.h>
-#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
#include <linux/if_vlan.h>
+#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
#define BCM_VLAN 1
#endif
#include <net/ip.h>
diff --git a/drivers/net/loopback.c b/drivers/net/loopback.c
index 49f6bc036a92..3b43bfd85a0f 100644
--- a/drivers/net/loopback.c
+++ b/drivers/net/loopback.c
@@ -64,68 +64,6 @@ struct pcpu_lstats {
unsigned long bytes;
};
-/* KISS: just allocate small chunks and copy bits.
- *
- * So, in fact, this is documentation, explaining what we expect
- * of largesending device modulo TCP checksum, which is ignored for loopback.
- */
-
-#ifdef LOOPBACK_TSO
-static void emulate_large_send_offload(struct sk_buff *skb)
-{
- struct iphdr *iph = ip_hdr(skb);
- struct tcphdr *th = (struct tcphdr *)(skb_network_header(skb) +
- (iph->ihl * 4));
- unsigned int doffset = (iph->ihl + th->doff) * 4;
- unsigned int mtu = skb_shinfo(skb)->gso_size + doffset;
- unsigned int offset = 0;
- u32 seq = ntohl(th->seq);
- u16 id = ntohs(iph->id);
-
- while (offset + doffset < skb->len) {
- unsigned int frag_size = min(mtu, skb->len - offset) - doffset;
- struct sk_buff *nskb = alloc_skb(mtu + 32, GFP_ATOMIC);
-
- if (!nskb)
- break;
- skb_reserve(nskb, 32);
- skb_set_mac_header(nskb, -ETH_HLEN);
- skb_reset_network_header(nskb);
- iph = ip_hdr(nskb);
- skb_copy_to_linear_data(nskb, skb_network_header(skb),
- doffset);
- if (skb_copy_bits(skb,
- doffset + offset,
- nskb->data + doffset,
- frag_size))
- BUG();
- skb_put(nskb, doffset + frag_size);
- nskb->ip_summed = CHECKSUM_UNNECESSARY;
- nskb->dev = skb->dev;
- nskb->priority = skb->priority;
- nskb->protocol = skb->protocol;
- nskb->dst = dst_clone(skb->dst);
- memcpy(nskb->cb, skb->cb, sizeof(skb->cb));
- nskb->pkt_type = skb->pkt_type;
-
- th = (struct tcphdr *)(skb_network_header(nskb) + iph->ihl * 4);
- iph->tot_len = htons(frag_size + doffset);
- iph->id = htons(id);
- iph->check = 0;
- iph->check = ip_fast_csum((unsigned char *) iph, iph->ihl);
- th->seq = htonl(seq);
- if (offset + doffset + frag_size < skb->len)
- th->fin = th->psh = 0;
- netif_rx(nskb);
- offset += frag_size;
- seq += frag_size;
- id++;
- }
-
- dev_kfree_skb(skb);
-}
-#endif /* LOOPBACK_TSO */
-
/*
* The higher levels take care of making this non-reentrant (it's
* called with bh's disabled).
@@ -137,9 +75,6 @@ static int loopback_xmit(struct sk_buff *skb, struct net_device *dev)
skb_orphan(skb);
skb->protocol = eth_type_trans(skb,dev);
-#ifndef LOOPBACK_MUST_CHECKSUM
- skb->ip_summed = CHECKSUM_UNNECESSARY;
-#endif
#ifdef LOOPBACK_TSO
if (skb_is_gso(skb)) {
@@ -234,9 +169,7 @@ static void loopback_setup(struct net_device *dev)
dev->type = ARPHRD_LOOPBACK; /* 0x0001*/
dev->flags = IFF_LOOPBACK;
dev->features = NETIF_F_SG | NETIF_F_FRAGLIST
-#ifdef LOOPBACK_TSO
| NETIF_F_TSO
-#endif
| NETIF_F_NO_CSUM
| NETIF_F_HIGHDMA
| NETIF_F_LLTX
diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index e6bbc639c2d0..6daea0c91862 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -358,6 +358,66 @@ static unsigned int tun_chr_poll(struct file *file, poll_table * wait)
return mask;
}
+/* prepad is the amount to reserve at front. len is length after that.
+ * linear is a hint as to how much to copy (usually headers). */
+static struct sk_buff *tun_alloc_skb(size_t prepad, size_t len, size_t linear,
+ gfp_t gfp)
+{
+ struct sk_buff *skb;
+ unsigned int i;
+
+ skb = alloc_skb(prepad + len, gfp|__GFP_NOWARN);
+ if (skb) {
+ skb_reserve(skb, prepad);
+ skb_put(skb, len);
+ return skb;
+ }
+
+ /* Under a page? Don't bother with paged skb. */
+ if (prepad + len < PAGE_SIZE)
+ return NULL;
+
+ /* Start with a normal skb, and add pages. */
+ skb = alloc_skb(prepad + linear, gfp);
+ if (!skb)
+ return NULL;
+
+ skb_reserve(skb, prepad);
+ skb_put(skb, linear);
+
+ len -= linear;
+
+ for (i = 0; i < MAX_SKB_FRAGS; i++) {
+ skb_frag_t *f = &skb_shinfo(skb)->frags[i];
+
+ f->page = alloc_page(gfp|__GFP_ZERO);
+ if (!f->page)
+ break;
+
+ f->page_offset = 0;
+ f->size = PAGE_SIZE;
+
+ skb->data_len += PAGE_SIZE;
+ skb->len += PAGE_SIZE;
+ skb->truesize += PAGE_SIZE;
+ skb_shinfo(skb)->nr_frags++;
+
+ if (len < PAGE_SIZE) {
+ len = 0;
+ break;
+ }
+ len -= PAGE_SIZE;
+ }
+
+ /* Too large, or alloc fail? */
+ if (unlikely(len)) {
+ kfree_skb(skb);
+ skb = NULL;
+ }
+
+ return skb;
+}
+
/* Get packet from user space buffer */
static __inline__ ssize_t tun_get_user(struct tun_struct *tun, struct iovec *iv, size_t count)
{
@@ -391,14 +451,12 @@ static __inline__ ssize_t tun_get_user(struct tun_struct *tun, struct iovec *iv,
return -EINVAL;
}
- if (!(skb = alloc_skb(len + align, GFP_KERNEL))) {
+ if (!(skb = tun_alloc_skb(align, len, gso.hdr_len, GFP_KERNEL))) {
tun->dev->stats.rx_dropped++;
return -ENOMEM;
}
- if (align)
- skb_reserve(skb, align);
- if (memcpy_fromiovec(skb_put(skb, len), iv, len)) {
+ if (skb_copy_datagram_from_iovec(skb, 0, iv, len)) {
tun->dev->stats.rx_dropped++;
kfree_skb(skb);
return -EFAULT;
@@ -748,6 +806,36 @@ static int tun_set_iff(struct net *net, struct file *file, struct ifreq *ifr)
return err;
}
+static int tun_get_iff(struct net *net, struct file *file, struct ifreq *ifr)
+{
+ struct tun_struct *tun = file->private_data;
+
+ if (!tun)
+ return -EBADFD;
+
+ DBG(KERN_INFO "%s: tun_get_iff\n", tun->dev->name);
+
+ strcpy(ifr->ifr_name, tun->dev->name);
+
+ ifr->ifr_flags = 0;
+
+ if (ifr->ifr_flags & TUN_TUN_DEV)
+ ifr->ifr_flags |= IFF_TUN;
+ else
+ ifr->ifr_flags |= IFF_TAP;
+
+ if (tun->flags & TUN_NO_PI)
+ ifr->ifr_flags |= IFF_NO_PI;
+
+ if (tun->flags & TUN_ONE_QUEUE)
+ ifr->ifr_flags |= IFF_ONE_QUEUE;
+
+ if (tun->flags & TUN_VNET_HDR)
+ ifr->ifr_flags |= IFF_VNET_HDR;
+
+ return 0;
+}
+
/* This is like a cut-down ethtool ops, except done via tun fd so no
* privs required. */
static int set_offload(struct net_device *dev, unsigned long arg)
@@ -833,6 +921,15 @@ static int tun_chr_ioctl(struct inode *inode, struct file *file,
DBG(KERN_INFO "%s: tun_chr_ioctl cmd %d\n", tun->dev->name, cmd);
switch (cmd) {
+ case TUNGETIFF:
+ ret = tun_get_iff(current->nsproxy->net_ns, file, &ifr);
+ if (ret)
+ return ret;
+
+ if (copy_to_user(argp, &ifr, sizeof(ifr)))
+ return -EFAULT;
+ break;
+
case TUNSETNOCSUM:
/* Disable/Enable checksum */
if (arg)
generated by cgit v1.2.3 (git 2.39.1) at 2025-01-02 20:46:39 +0100