forked from Minki/linux
ipv4: Remove all uses of LL_ALLOCATED_SPACE
ipv4: Remove all uses of LL_ALLOCATED_SPACE The macro LL_ALLOCATED_SPACE was ill-conceived. It applies the alignment to the sum of needed_headroom and needed_tailroom. As the amount that is then reserved for head room is needed_headroom with alignment, this means that the tail room left may be too small. This patch replaces all uses of LL_ALLOCATED_SPACE in net/ipv4 with the macro LL_RESERVED_SPACE and direct reference to needed_tailroom. This also fixes the problem with needed_headroom changing between allocating the skb and reserving the head room. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
parent
505a467b66
commit
6608824329
@ -592,16 +592,18 @@ struct sk_buff *arp_create(int type, int ptype, __be32 dest_ip,
|
||||
struct sk_buff *skb;
|
||||
struct arphdr *arp;
|
||||
unsigned char *arp_ptr;
|
||||
int hlen = LL_RESERVED_SPACE(dev);
|
||||
int tlen = dev->needed_tailroom;
|
||||
|
||||
/*
|
||||
* Allocate a buffer
|
||||
*/
|
||||
|
||||
skb = alloc_skb(arp_hdr_len(dev) + LL_ALLOCATED_SPACE(dev), GFP_ATOMIC);
|
||||
skb = alloc_skb(arp_hdr_len(dev) + hlen + tlen, GFP_ATOMIC);
|
||||
if (skb == NULL)
|
||||
return NULL;
|
||||
|
||||
skb_reserve(skb, LL_RESERVED_SPACE(dev));
|
||||
skb_reserve(skb, hlen);
|
||||
skb_reset_network_header(skb);
|
||||
arp = (struct arphdr *) skb_put(skb, arp_hdr_len(dev));
|
||||
skb->dev = dev;
|
||||
|
@ -304,9 +304,11 @@ static struct sk_buff *igmpv3_newpack(struct net_device *dev, int size)
|
||||
struct igmpv3_report *pig;
|
||||
struct net *net = dev_net(dev);
|
||||
struct flowi4 fl4;
|
||||
int hlen = LL_RESERVED_SPACE(dev);
|
||||
int tlen = dev->needed_tailroom;
|
||||
|
||||
while (1) {
|
||||
skb = alloc_skb(size + LL_ALLOCATED_SPACE(dev),
|
||||
skb = alloc_skb(size + hlen + tlen,
|
||||
GFP_ATOMIC | __GFP_NOWARN);
|
||||
if (skb)
|
||||
break;
|
||||
@ -327,7 +329,7 @@ static struct sk_buff *igmpv3_newpack(struct net_device *dev, int size)
|
||||
skb_dst_set(skb, &rt->dst);
|
||||
skb->dev = dev;
|
||||
|
||||
skb_reserve(skb, LL_RESERVED_SPACE(dev));
|
||||
skb_reserve(skb, hlen);
|
||||
|
||||
skb_reset_network_header(skb);
|
||||
pip = ip_hdr(skb);
|
||||
@ -647,6 +649,7 @@ static int igmp_send_report(struct in_device *in_dev, struct ip_mc_list *pmc,
|
||||
__be32 group = pmc ? pmc->multiaddr : 0;
|
||||
struct flowi4 fl4;
|
||||
__be32 dst;
|
||||
int hlen, tlen;
|
||||
|
||||
if (type == IGMPV3_HOST_MEMBERSHIP_REPORT)
|
||||
return igmpv3_send_report(in_dev, pmc);
|
||||
@ -661,7 +664,9 @@ static int igmp_send_report(struct in_device *in_dev, struct ip_mc_list *pmc,
|
||||
if (IS_ERR(rt))
|
||||
return -1;
|
||||
|
||||
skb = alloc_skb(IGMP_SIZE+LL_ALLOCATED_SPACE(dev), GFP_ATOMIC);
|
||||
hlen = LL_RESERVED_SPACE(dev);
|
||||
tlen = dev->needed_tailroom;
|
||||
skb = alloc_skb(IGMP_SIZE + hlen + tlen, GFP_ATOMIC);
|
||||
if (skb == NULL) {
|
||||
ip_rt_put(rt);
|
||||
return -1;
|
||||
@ -669,7 +674,7 @@ static int igmp_send_report(struct in_device *in_dev, struct ip_mc_list *pmc,
|
||||
|
||||
skb_dst_set(skb, &rt->dst);
|
||||
|
||||
skb_reserve(skb, LL_RESERVED_SPACE(dev));
|
||||
skb_reserve(skb, hlen);
|
||||
|
||||
skb_reset_network_header(skb);
|
||||
iph = ip_hdr(skb);
|
||||
|
@ -763,13 +763,15 @@ static void __init ic_bootp_send_if(struct ic_device *d, unsigned long jiffies_d
|
||||
struct sk_buff *skb;
|
||||
struct bootp_pkt *b;
|
||||
struct iphdr *h;
|
||||
int hlen = LL_RESERVED_SPACE(dev);
|
||||
int tlen = dev->needed_tailroom;
|
||||
|
||||
/* Allocate packet */
|
||||
skb = alloc_skb(sizeof(struct bootp_pkt) + LL_ALLOCATED_SPACE(dev) + 15,
|
||||
skb = alloc_skb(sizeof(struct bootp_pkt) + hlen + tlen + 15,
|
||||
GFP_KERNEL);
|
||||
if (!skb)
|
||||
return;
|
||||
skb_reserve(skb, LL_RESERVED_SPACE(dev));
|
||||
skb_reserve(skb, hlen);
|
||||
b = (struct bootp_pkt *) skb_put(skb, sizeof(struct bootp_pkt));
|
||||
memset(b, 0, sizeof(struct bootp_pkt));
|
||||
|
||||
|
@ -328,6 +328,7 @@ static int raw_send_hdrinc(struct sock *sk, struct flowi4 *fl4,
|
||||
unsigned int iphlen;
|
||||
int err;
|
||||
struct rtable *rt = *rtp;
|
||||
int hlen, tlen;
|
||||
|
||||
if (length > rt->dst.dev->mtu) {
|
||||
ip_local_error(sk, EMSGSIZE, fl4->daddr, inet->inet_dport,
|
||||
@ -337,12 +338,14 @@ static int raw_send_hdrinc(struct sock *sk, struct flowi4 *fl4,
|
||||
if (flags&MSG_PROBE)
|
||||
goto out;
|
||||
|
||||
hlen = LL_RESERVED_SPACE(rt->dst.dev);
|
||||
tlen = rt->dst.dev->needed_tailroom;
|
||||
skb = sock_alloc_send_skb(sk,
|
||||
length + LL_ALLOCATED_SPACE(rt->dst.dev) + 15,
|
||||
length + hlen + tlen + 15,
|
||||
flags & MSG_DONTWAIT, &err);
|
||||
if (skb == NULL)
|
||||
goto error;
|
||||
skb_reserve(skb, LL_RESERVED_SPACE(rt->dst.dev));
|
||||
skb_reserve(skb, hlen);
|
||||
|
||||
skb->priority = sk->sk_priority;
|
||||
skb->mark = sk->sk_mark;
|
||||
|
Loading…
Reference in New Issue
Block a user