summaryrefslogtreecommitdiff
path: root/net/ipv4/af_inet.c
diff options
context:
space:
mode:
Diffstat (limited to 'net/ipv4/af_inet.c')
-rw-r--r--net/ipv4/af_inet.c148
1 files changed, 119 insertions, 29 deletions
diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index cf358c84c440..16aae8ef5555 100644
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -87,6 +87,7 @@
#include <linux/init.h>
#include <linux/poll.h>
#include <linux/netfilter_ipv4.h>
+#include <linux/random.h>
#include <asm/uaccess.h>
#include <asm/system.h>
@@ -217,6 +218,26 @@ out:
return err;
}
+u32 inet_ehash_secret __read_mostly;
+EXPORT_SYMBOL(inet_ehash_secret);
+
+/*
+ * inet_ehash_secret must be set exactly once
+ * Instead of using a dedicated spinlock, we (ab)use inetsw_lock
+ */
+void build_ehash_secret(void)
+{
+ u32 rnd;
+ do {
+ get_random_bytes(&rnd, sizeof(rnd));
+ } while (rnd == 0);
+ spin_lock_bh(&inetsw_lock);
+ if (!inet_ehash_secret)
+ inet_ehash_secret = rnd;
+ spin_unlock_bh(&inetsw_lock);
+}
+EXPORT_SYMBOL(build_ehash_secret);
+
/*
* Create an inet socket.
*/
@@ -233,6 +254,11 @@ static int inet_create(struct socket *sock, int protocol)
int try_loading_module = 0;
int err;
+ if (sock->type != SOCK_RAW &&
+ sock->type != SOCK_DGRAM &&
+ !inet_ehash_secret)
+ build_ehash_secret();
+
sock->state = SS_UNCONNECTED;
/* Look for the requested type/protocol pair. */
@@ -755,6 +781,9 @@ int inet_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
case SIOCGSTAMP:
err = sock_get_timestamp(sk, (struct timeval __user *)arg);
break;
+ case SIOCGSTAMPNS:
+ err = sock_get_timestampns(sk, (struct timespec __user *)arg);
+ break;
case SIOCADDRT:
case SIOCDELRT:
case SIOCRTMSG:
@@ -1109,7 +1138,7 @@ static int inet_gso_send_check(struct sk_buff *skb)
if (unlikely(!pskb_may_pull(skb, sizeof(*iph))))
goto out;
- iph = skb->nh.iph;
+ iph = ip_hdr(skb);
ihl = iph->ihl * 4;
if (ihl < sizeof(*iph))
goto out;
@@ -1117,8 +1146,9 @@ static int inet_gso_send_check(struct sk_buff *skb)
if (unlikely(!pskb_may_pull(skb, ihl)))
goto out;
- skb->h.raw = __skb_pull(skb, ihl);
- iph = skb->nh.iph;
+ __skb_pull(skb, ihl);
+ skb_reset_transport_header(skb);
+ iph = ip_hdr(skb);
proto = iph->protocol & (MAX_INET_PROTOS - 1);
err = -EPROTONOSUPPORT;
@@ -1152,7 +1182,7 @@ static struct sk_buff *inet_gso_segment(struct sk_buff *skb, int features)
if (unlikely(!pskb_may_pull(skb, sizeof(*iph))))
goto out;
- iph = skb->nh.iph;
+ iph = ip_hdr(skb);
ihl = iph->ihl * 4;
if (ihl < sizeof(*iph))
goto out;
@@ -1160,8 +1190,9 @@ static struct sk_buff *inet_gso_segment(struct sk_buff *skb, int features)
if (unlikely(!pskb_may_pull(skb, ihl)))
goto out;
- skb->h.raw = __skb_pull(skb, ihl);
- iph = skb->nh.iph;
+ __skb_pull(skb, ihl);
+ skb_reset_transport_header(skb);
+ iph = ip_hdr(skb);
id = ntohs(iph->id);
proto = iph->protocol & (MAX_INET_PROTOS - 1);
segs = ERR_PTR(-EPROTONOSUPPORT);
@@ -1177,17 +1208,57 @@ static struct sk_buff *inet_gso_segment(struct sk_buff *skb, int features)
skb = segs;
do {
- iph = skb->nh.iph;
+ iph = ip_hdr(skb);
iph->id = htons(id++);
iph->tot_len = htons(skb->len - skb->mac_len);
iph->check = 0;
- iph->check = ip_fast_csum(skb->nh.raw, iph->ihl);
+ iph->check = ip_fast_csum(skb_network_header(skb), iph->ihl);
} while ((skb = skb->next));
out:
return segs;
}
+unsigned long snmp_fold_field(void *mib[], int offt)
+{
+ unsigned long res = 0;
+ int i;
+
+ for_each_possible_cpu(i) {
+ res += *(((unsigned long *) per_cpu_ptr(mib[0], i)) + offt);
+ res += *(((unsigned long *) per_cpu_ptr(mib[1], i)) + offt);
+ }
+ return res;
+}
+EXPORT_SYMBOL_GPL(snmp_fold_field);
+
+int snmp_mib_init(void *ptr[2], size_t mibsize, size_t mibalign)
+{
+ BUG_ON(ptr == NULL);
+ ptr[0] = __alloc_percpu(mibsize);
+ if (!ptr[0])
+ goto err0;
+ ptr[1] = __alloc_percpu(mibsize);
+ if (!ptr[1])
+ goto err1;
+ return 0;
+err1:
+ free_percpu(ptr[0]);
+ ptr[0] = NULL;
+err0:
+ return -ENOMEM;
+}
+EXPORT_SYMBOL_GPL(snmp_mib_init);
+
+void snmp_mib_free(void *ptr[2])
+{
+ BUG_ON(ptr == NULL);
+ free_percpu(ptr[0]);
+ free_percpu(ptr[1]);
+ ptr[0] = ptr[1] = NULL;
+}
+EXPORT_SYMBOL_GPL(snmp_mib_free);
+
#ifdef CONFIG_IP_MULTICAST
static struct net_protocol igmp_protocol = {
.handler = igmp_rcv,
@@ -1214,28 +1285,47 @@ static struct net_protocol icmp_protocol = {
static int __init init_ipv4_mibs(void)
{
- net_statistics[0] = alloc_percpu(struct linux_mib);
- net_statistics[1] = alloc_percpu(struct linux_mib);
- ip_statistics[0] = alloc_percpu(struct ipstats_mib);
- ip_statistics[1] = alloc_percpu(struct ipstats_mib);
- icmp_statistics[0] = alloc_percpu(struct icmp_mib);
- icmp_statistics[1] = alloc_percpu(struct icmp_mib);
- tcp_statistics[0] = alloc_percpu(struct tcp_mib);
- tcp_statistics[1] = alloc_percpu(struct tcp_mib);
- udp_statistics[0] = alloc_percpu(struct udp_mib);
- udp_statistics[1] = alloc_percpu(struct udp_mib);
- udplite_statistics[0] = alloc_percpu(struct udp_mib);
- udplite_statistics[1] = alloc_percpu(struct udp_mib);
- if (!
- (net_statistics[0] && net_statistics[1] && ip_statistics[0]
- && ip_statistics[1] && tcp_statistics[0] && tcp_statistics[1]
- && udp_statistics[0] && udp_statistics[1]
- && udplite_statistics[0] && udplite_statistics[1] ) )
- return -ENOMEM;
-
- (void) tcp_mib_init();
+ if (snmp_mib_init((void **)net_statistics,
+ sizeof(struct linux_mib),
+ __alignof__(struct linux_mib)) < 0)
+ goto err_net_mib;
+ if (snmp_mib_init((void **)ip_statistics,
+ sizeof(struct ipstats_mib),
+ __alignof__(struct ipstats_mib)) < 0)
+ goto err_ip_mib;
+ if (snmp_mib_init((void **)icmp_statistics,
+ sizeof(struct icmp_mib),
+ __alignof__(struct icmp_mib)) < 0)
+ goto err_icmp_mib;
+ if (snmp_mib_init((void **)tcp_statistics,
+ sizeof(struct tcp_mib),
+ __alignof__(struct tcp_mib)) < 0)
+ goto err_tcp_mib;
+ if (snmp_mib_init((void **)udp_statistics,
+ sizeof(struct udp_mib),
+ __alignof__(struct udp_mib)) < 0)
+ goto err_udp_mib;
+ if (snmp_mib_init((void **)udplite_statistics,
+ sizeof(struct udp_mib),
+ __alignof__(struct udp_mib)) < 0)
+ goto err_udplite_mib;
+
+ tcp_mib_init();
return 0;
+
+err_udplite_mib:
+ snmp_mib_free((void **)udp_statistics);
+err_udp_mib:
+ snmp_mib_free((void **)tcp_statistics);
+err_tcp_mib:
+ snmp_mib_free((void **)icmp_statistics);
+err_icmp_mib:
+ snmp_mib_free((void **)ip_statistics);
+err_ip_mib:
+ snmp_mib_free((void **)net_statistics);
+err_net_mib:
+ return -ENOMEM;
}
static int ipv4_proc_init(void);
@@ -1336,7 +1426,7 @@ static int __init inet_init(void)
* Initialise per-cpu ipv4 mibs
*/
- if(init_ipv4_mibs())
+ if (init_ipv4_mibs())
printk(KERN_CRIT "inet_init: Cannot init ipv4 mibs\n"); ;
ipv4_proc_init();
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-07 16:41:30 +0000