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[UDP]: Allow users to configure UDP-Lite.

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Let's give users an option for disabling UDP-Lite (~4K).

old:
|    text	   data	    bss	    dec	    hex	filename
|  286498	  12432	   6072	 305002	  4a76a	net/ipv4/built-in.o
|  193830	   8192	   3204	 205226	  321aa	net/ipv6/ipv6.o

new (without UDP-Lite):
|    text	   data	    bss	    dec	    hex	filename
|  284086	  12136	   5432	 301654	  49a56	net/ipv4/built-in.o
|  191835	   7832	   3076	 202743	  317f7	net/ipv6/ipv6.o

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
This commit is contained in:
YOSHIFUJI Hideaki
2008-03-01 01:06:47 +09:00
parent c6aefafb7e
commit e898d4db27
14 changed files with 99 additions and 25 deletions
Download Patch File Download Diff File Expand all files Collapse all files
include/linux/udp.h
+11
View File
@@ -70,8 +70,10 @@ struct udp_sock {
#define UDPLITE_BIT 0x1 /* set by udplite proto init function */
#define UDPLITE_SEND_CC 0x2 /* set via udplite setsockopt */
#define UDPLITE_RECV_CC 0x4 /* set via udplite setsocktopt */
#ifdef CONFIG_IP_UDPLITE
__u8 pcflag; /* marks socket as UDP-Lite if > 0 */
__u8 unused[3];
#endif
/*
* For encapsulation sockets.
*/
@@ -82,7 +84,16 @@ static inline struct udp_sock *udp_sk(const struct sock *sk)
{
return (struct udp_sock *)sk;
}
#ifdef CONFIG_IP_UDPLITE
#define IS_UDPLITE(__sk) (udp_sk(__sk)->pcflag)
#define IS_PROTO_UDPLITE(__proto) ((__proto) == IPPROTO_UDPLITE)
#define IS_SOL_UDPFAMILY(level) ((level) == SOL_UDP || (level) == SOL_UDPLITE)
#else
#define IS_UDPLITE(__sk) 0
#define IS_PROTO_UDPLITE(__proto) 0
#define IS_SOL_UDPFAMILY(level) ((level) == SOL_UDP)
#endif
#endif
include/net/ipv6.h
+5
View File
@@ -603,8 +603,13 @@ extern int tcp6_proc_init(void);
extern void tcp6_proc_exit(void);
extern int udp6_proc_init(void);
extern void udp6_proc_exit(void);
#ifdef CONFIG_IP_UDPLITE
extern int udplite6_proc_init(void);
extern void udplite6_proc_exit(void);
#else
static inline int udplite6_proc_init(void) { return 0; }
static inline void udplite6_proc_exit(void) { }
#endif
extern int ipv6_misc_proc_init(void);
extern void ipv6_misc_proc_exit(void);
extern int snmp6_register_dev(struct inet6_dev *idev);
include/net/transp_v6.h
+5
View File
@@ -27,8 +27,13 @@ extern int rawv6_init(void);
extern void rawv6_exit(void);
extern int udpv6_init(void);
extern void udpv6_exit(void);
#ifdef CONFIG_IP_UDPLITE
extern int udplitev6_init(void);
extern void udplitev6_exit(void);
#else
static inline int udplitev6_init(void) { return 0; }
static inline void udplitev6_exit(void) { }
#endif
extern int tcpv6_init(void);
extern void tcpv6_exit(void);
include/net/udplite.h
+7 -2
View File
@@ -25,7 +25,9 @@ static __inline__ int udplite_getfrag(void *from, char *to, int offset,
/* Designate sk as UDP-Lite socket */
static inline int udplite_sk_init(struct sock *sk)
{
#ifdef CONFIG_IP_UDPLITE
udp_sk(sk)->pcflag = UDPLITE_BIT;
#endif
return 0;
}
@@ -69,7 +71,7 @@ static inline int udplite_checksum_init(struct sk_buff *skb, struct udphdr *uh)
static inline int udplite_sender_cscov(struct udp_sock *up, struct udphdr *uh)
{
int cscov = up->len;
#ifdef CONFIG_IP_UDPLITE
/*
* Sender has set `partial coverage' option on UDP-Lite socket
*/
@@ -93,13 +95,15 @@ static inline int udplite_sender_cscov(struct udp_sock *up, struct udphdr *uh)
* illegal, we fall back to the defaults here.
*/
}
#endif
return cscov;
}
static inline __wsum udplite_csum_outgoing(struct sock *sk, struct sk_buff *skb)
{
int cscov = udplite_sender_cscov(udp_sk(sk), udp_hdr(skb));
__wsum csum = 0;
#ifdef CONFIG_IP_UDPLITE
int cscov = udplite_sender_cscov(udp_sk(sk), udp_hdr(skb));
skb->ip_summed = CHECKSUM_NONE; /* no HW support for checksumming */
@@ -112,6 +116,7 @@ static inline __wsum udplite_csum_outgoing(struct sock *sk, struct sk_buff *skb)
if ((cscov -= len) <= 0)
break;
}
#endif
return csum;
}