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ipv4: Adjust in_dev handling in fib_validate_source() 

Checking for in_dev being NULL is pointless.

In fact, all of our callers have in_dev precomputed already,
so just pass it in and remove the NULL checking.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2012-06-28 18:54:02 -07:00
parent a207a4b2e8
commit 9e56e3800e
3 changed files with 17 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
include/net/ip_fib.h
View File

@ -233,7 +233,7 @@ extern void ip_fib_init(void);
extern __be32 fib_compute_spec_dst(struct sk_buff *skb);
extern int fib_validate_source(struct sk_buff *skb, __be32 src, __be32 dst,
u8 tos, int oif, struct net_device *dev,
u32 *itag);
struct in_device *idev, u32 *itag);
extern void fib_select_default(struct fib_result *res);
/* Exported by fib_semantics.c */

27
net/ipv4/fib_frontend.c
View File

@ -226,15 +226,14 @@ __be32 fib_compute_spec_dst(struct sk_buff *skb)
* called with rcu_read_lock()
*/
int fib_validate_source(struct sk_buff *skb, __be32 src, __be32 dst, u8 tos,
int oif, struct net_device *dev, u32 *itag)
int oif, struct net_device *dev, struct in_device *idev,
u32 *itag)
{
struct in_device *in_dev;
struct flowi4 fl4;
int ret, no_addr, rpf, accept_local;
struct fib_result res;
int no_addr, rpf, accept_local;
bool dev_match;
int ret;
struct flowi4 fl4;
struct net *net;
bool dev_match;
fl4.flowi4_oif = 0;
fl4.flowi4_iif = oif;
@ -244,19 +243,13 @@ int fib_validate_source(struct sk_buff *skb, __be32 src, __be32 dst, u8 tos,
fl4.flowi4_scope = RT_SCOPE_UNIVERSE;
no_addr = rpf = accept_local = 0;
in_dev = __in_dev_get_rcu(dev);
if (in_dev) {
no_addr = in_dev->ifa_list == NULL;
no_addr = idev->ifa_list == NULL;
/* Ignore rp_filter for packets protected by IPsec. */
rpf = secpath_exists(skb) ? 0 : IN_DEV_RPFILTER(in_dev);
/* Ignore rp_filter for packets protected by IPsec. */
rpf = secpath_exists(skb) ? 0 : IN_DEV_RPFILTER(idev);
accept_local = IN_DEV_ACCEPT_LOCAL(in_dev);
fl4.flowi4_mark = IN_DEV_SRC_VMARK(in_dev) ? skb->mark : 0;
}
if (in_dev == NULL)
goto e_inval;
accept_local = IN_DEV_ACCEPT_LOCAL(idev);
fl4.flowi4_mark = IN_DEV_SRC_VMARK(idev) ? skb->mark : 0;
net = dev_net(dev);
if (fib_lookup(net, &fl4, &res))

10
net/ipv4/route.c
View File

@ -1999,7 +1999,8 @@ static int ip_route_input_mc(struct sk_buff *skb, __be32 daddr, __be32 saddr,
if (!ipv4_is_local_multicast(daddr))
goto e_inval;
} else {
err = fib_validate_source(skb, saddr, 0, tos, 0, dev, &itag);
err = fib_validate_source(skb, saddr, 0, tos, 0, dev,
in_dev, &itag);
if (err < 0)
goto e_err;
}
@ -2100,7 +2101,7 @@ static int __mkroute_input(struct sk_buff *skb,
err = fib_validate_source(skb, saddr, daddr, tos, FIB_RES_OIF(*res),
in_dev->dev, &itag);
in_dev->dev, in_dev, &itag);
if (err < 0) {
ip_handle_martian_source(in_dev->dev, in_dev, skb, daddr,
saddr);
@ -2274,7 +2275,7 @@ static int ip_route_input_slow(struct sk_buff *skb, __be32 daddr, __be32 saddr,
if (res.type == RTN_LOCAL) {
err = fib_validate_source(skb, saddr, daddr, tos,
net->loopback_dev->ifindex,
dev, &itag);
dev, in_dev, &itag);
if (err < 0)
goto martian_source_keep_err;
if (err)
@ -2295,7 +2296,8 @@ brd_input:
goto e_inval;
if (!ipv4_is_zeronet(saddr)) {
err = fib_validate_source(skb, saddr, 0, tos, 0, dev, &itag);
err = fib_validate_source(skb, saddr, 0, tos, 0, dev,
in_dev, &itag);
if (err < 0)
goto martian_source_keep_err;
if (err)