X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=net%2Fdccp%2Fccid.h;h=facedd20b531a0ce42fb03f5afccef290f11f7bc;hb=85a151b760348e4693e54bc8cece89ab9d3dc81d;hp=06105b2a613cbf902999957d4566f2b9f4de308a;hpb=7c657876b63cb1d8a2ec06f8fc6c37bb8412e66c;p=safe%2Fjmp%2Flinux-2.6

diff --git a/net/dccp/ccid.h b/net/dccp/ccid.h
index 06105b2..facedd2 100644
--- a/net/dccp/ccid.h
+++ b/net/dccp/ccid.h
@@ -14,108 +14,154 @@
  */
 
 #include <net/sock.h>
+#include <linux/compiler.h>
 #include <linux/dccp.h>
 #include <linux/list.h>
 #include <linux/module.h>
 
 #define CCID_MAX 255
 
-struct ccid {
-	unsigned char	ccid_id;
-	const char	*ccid_name;
-	struct module	*ccid_owner;
-	int		(*ccid_init)(struct sock *sk);
-	void		(*ccid_exit)(struct sock *sk);
-	int		(*ccid_hc_rx_init)(struct sock *sk);
-	int		(*ccid_hc_tx_init)(struct sock *sk);
+struct tcp_info;
+
+/**
+ *  struct ccid_operations  -  Interface to Congestion-Control Infrastructure
+ *
+ *  @ccid_id: numerical CCID ID (up to %CCID_MAX, cf. table 5 in RFC 4340, 10.)
+ *  @ccid_ccmps: the CCMPS including network/transport headers (0 when disabled)
+ *  @ccid_name: alphabetical identifier string for @ccid_id
+ *  @ccid_hc_{r,t}x_slab: memory pool for the receiver/sender half-connection
+ *  @ccid_hc_{r,t}x_obj_size: size of the receiver/sender half-connection socket
+ *
+ *  @ccid_hc_{r,t}x_init: CCID-specific initialisation routine (before startup)
+ *  @ccid_hc_{r,t}x_exit: CCID-specific cleanup routine (before destruction)
+ *  @ccid_hc_rx_packet_recv: implements the HC-receiver side
+ *  @ccid_hc_{r,t}x_parse_options: parsing routine for CCID/HC-specific options
+ *  @ccid_hc_{r,t}x_insert_options: insert routine for CCID/HC-specific options
+ *  @ccid_hc_tx_packet_recv: implements feedback processing for the HC-sender
+ *  @ccid_hc_tx_send_packet: implements the sending part of the HC-sender
+ *  @ccid_hc_tx_packet_sent: does accounting for packets in flight by HC-sender
+ *  @ccid_hc_{r,t}x_get_info: INET_DIAG information for HC-receiver/sender
+ *  @ccid_hc_{r,t}x_getsockopt: socket options specific to HC-receiver/sender
+ */
+struct ccid_operations {
+	unsigned char		ccid_id;
+	__u32			ccid_ccmps;
+	const char		*ccid_name;
+	struct kmem_cache	*ccid_hc_rx_slab,
+				*ccid_hc_tx_slab;
+	__u32			ccid_hc_rx_obj_size,
+				ccid_hc_tx_obj_size;
+	/* Interface Routines */
+	int		(*ccid_hc_rx_init)(struct ccid *ccid, struct sock *sk);
+	int		(*ccid_hc_tx_init)(struct ccid *ccid, struct sock *sk);
 	void		(*ccid_hc_rx_exit)(struct sock *sk);
 	void		(*ccid_hc_tx_exit)(struct sock *sk);
-	void		(*ccid_hc_rx_packet_recv)(struct sock *sk, struct sk_buff *skb);
+	void		(*ccid_hc_rx_packet_recv)(struct sock *sk,
+						  struct sk_buff *skb);
 	int		(*ccid_hc_rx_parse_options)(struct sock *sk,
 						    unsigned char option,
 						    unsigned char len, u16 idx,
 						    unsigned char* value);
-	void		(*ccid_hc_rx_insert_options)(struct sock *sk, struct sk_buff *skb);
-	void		(*ccid_hc_tx_insert_options)(struct sock *sk, struct sk_buff *skb);
-	void		(*ccid_hc_tx_packet_recv)(struct sock *sk, struct sk_buff *skb);
+	int		(*ccid_hc_rx_insert_options)(struct sock *sk,
+						     struct sk_buff *skb);
+	void		(*ccid_hc_tx_packet_recv)(struct sock *sk,
+						  struct sk_buff *skb);
 	int		(*ccid_hc_tx_parse_options)(struct sock *sk,
 						    unsigned char option,
 						    unsigned char len, u16 idx,
 						    unsigned char* value);
 	int		(*ccid_hc_tx_send_packet)(struct sock *sk,
-						  struct sk_buff *skb, int len,
-						  long *delay);
-	void		(*ccid_hc_tx_packet_sent)(struct sock *sk, int more, int len);
+						  struct sk_buff *skb);
+	void		(*ccid_hc_tx_packet_sent)(struct sock *sk,
+						  int more, unsigned int len);
+	void		(*ccid_hc_rx_get_info)(struct sock *sk,
+					       struct tcp_info *info);
+	void		(*ccid_hc_tx_get_info)(struct sock *sk,
+					       struct tcp_info *info);
+	int		(*ccid_hc_rx_getsockopt)(struct sock *sk,
+						 const int optname, int len,
+						 u32 __user *optval,
+						 int __user *optlen);
+	int		(*ccid_hc_tx_getsockopt)(struct sock *sk,
+						 const int optname, int len,
+						 u32 __user *optval,
+						 int __user *optlen);
 };
 
-extern int	   ccid_register(struct ccid *ccid);
-extern int	   ccid_unregister(struct ccid *ccid);
+extern struct ccid_operations ccid2_ops;
+#ifdef CONFIG_IP_DCCP_CCID3
+extern struct ccid_operations ccid3_ops;
+#endif
 
-extern struct ccid *ccid_init(unsigned char id, struct sock *sk);
-extern void	   ccid_exit(struct ccid *ccid, struct sock *sk);
+extern int  ccid_initialize_builtins(void);
+extern void ccid_cleanup_builtins(void);
 
-static inline void __ccid_get(struct ccid *ccid)
-{
-	__module_get(ccid->ccid_owner);
-}
+struct ccid {
+	struct ccid_operations *ccid_ops;
+	char		       ccid_priv[0];
+};
 
-static inline int ccid_hc_tx_send_packet(struct ccid *ccid, struct sock *sk,
-					 struct sk_buff *skb, int len,
-					 long *delay)
+static inline void *ccid_priv(const struct ccid *ccid)
 {
-	int rc = 0;
-	if (ccid->ccid_hc_tx_send_packet != NULL)
-		rc = ccid->ccid_hc_tx_send_packet(sk, skb, len, delay);
-	return rc;
+	return (void *)ccid->ccid_priv;
 }
 
-static inline void ccid_hc_tx_packet_sent(struct ccid *ccid, struct sock *sk,
-					  int more, int len)
+extern bool ccid_support_check(u8 const *ccid_array, u8 array_len);
+extern int  ccid_get_builtin_ccids(u8 **ccid_array, u8 *array_len);
+extern int  ccid_getsockopt_builtin_ccids(struct sock *sk, int len,
+					  char __user *, int __user *);
+
+extern struct ccid *ccid_new(const u8 id, struct sock *sk, bool rx);
+
+static inline int ccid_get_current_rx_ccid(struct dccp_sock *dp)
 {
-	if (ccid->ccid_hc_tx_packet_sent != NULL)
-		ccid->ccid_hc_tx_packet_sent(sk, more, len);
+	struct ccid *ccid = dp->dccps_hc_rx_ccid;
+
+	if (ccid == NULL || ccid->ccid_ops == NULL)
+		return -1;
+	return ccid->ccid_ops->ccid_id;
 }
 
-static inline int ccid_hc_rx_init(struct ccid *ccid, struct sock *sk)
+static inline int ccid_get_current_tx_ccid(struct dccp_sock *dp)
 {
-	int rc = 0;
-	if (ccid->ccid_hc_rx_init != NULL)
-		rc = ccid->ccid_hc_rx_init(sk);
-	return rc;
+	struct ccid *ccid = dp->dccps_hc_tx_ccid;
+
+	if (ccid == NULL || ccid->ccid_ops == NULL)
+		return -1;
+	return ccid->ccid_ops->ccid_id;
 }
 
-static inline int ccid_hc_tx_init(struct ccid *ccid, struct sock *sk)
+extern void ccid_hc_rx_delete(struct ccid *ccid, struct sock *sk);
+extern void ccid_hc_tx_delete(struct ccid *ccid, struct sock *sk);
+
+static inline int ccid_hc_tx_send_packet(struct ccid *ccid, struct sock *sk,
+					 struct sk_buff *skb)
 {
 	int rc = 0;
-	if (ccid->ccid_hc_tx_init != NULL)
-		rc = ccid->ccid_hc_tx_init(sk);
+	if (ccid->ccid_ops->ccid_hc_tx_send_packet != NULL)
+		rc = ccid->ccid_ops->ccid_hc_tx_send_packet(sk, skb);
 	return rc;
 }
 
-static inline void ccid_hc_rx_exit(struct ccid *ccid, struct sock *sk)
-{
-	if (ccid->ccid_hc_rx_exit != NULL)
-		ccid->ccid_hc_rx_exit(sk);
-}
-
-static inline void ccid_hc_tx_exit(struct ccid *ccid, struct sock *sk)
+static inline void ccid_hc_tx_packet_sent(struct ccid *ccid, struct sock *sk,
+					  int more, unsigned int len)
 {
-	if (ccid->ccid_hc_tx_exit != NULL)
-		ccid->ccid_hc_tx_exit(sk);
+	if (ccid->ccid_ops->ccid_hc_tx_packet_sent != NULL)
+		ccid->ccid_ops->ccid_hc_tx_packet_sent(sk, more, len);
 }
 
 static inline void ccid_hc_rx_packet_recv(struct ccid *ccid, struct sock *sk,
 					  struct sk_buff *skb)
 {
-	if (ccid->ccid_hc_rx_packet_recv != NULL)
-		ccid->ccid_hc_rx_packet_recv(sk, skb);
+	if (ccid->ccid_ops->ccid_hc_rx_packet_recv != NULL)
+		ccid->ccid_ops->ccid_hc_rx_packet_recv(sk, skb);
 }
 
 static inline void ccid_hc_tx_packet_recv(struct ccid *ccid, struct sock *sk,
 					  struct sk_buff *skb)
 {
-	if (ccid->ccid_hc_tx_packet_recv != NULL)
-		ccid->ccid_hc_tx_packet_recv(sk, skb);
+	if (ccid->ccid_ops->ccid_hc_tx_packet_recv != NULL)
+		ccid->ccid_ops->ccid_hc_tx_packet_recv(sk, skb);
 }
 
 static inline int ccid_hc_tx_parse_options(struct ccid *ccid, struct sock *sk,
@@ -124,8 +170,9 @@ static inline int ccid_hc_tx_parse_options(struct ccid *ccid, struct sock *sk,
 					   unsigned char* value)
 {
 	int rc = 0;
-	if (ccid->ccid_hc_tx_parse_options != NULL)
-		rc = ccid->ccid_hc_tx_parse_options(sk, option, len, idx, value);
+	if (ccid->ccid_ops->ccid_hc_tx_parse_options != NULL)
+		rc = ccid->ccid_ops->ccid_hc_tx_parse_options(sk, option, len, idx,
+						    value);
 	return rc;
 }
 
@@ -135,22 +182,52 @@ static inline int ccid_hc_rx_parse_options(struct ccid *ccid, struct sock *sk,
 					   unsigned char* value)
 {
 	int rc = 0;
-	if (ccid->ccid_hc_rx_parse_options != NULL)
-		rc = ccid->ccid_hc_rx_parse_options(sk, option, len, idx, value);
+	if (ccid->ccid_ops->ccid_hc_rx_parse_options != NULL)
+		rc = ccid->ccid_ops->ccid_hc_rx_parse_options(sk, option, len, idx, value);
 	return rc;
 }
 
-static inline void ccid_hc_tx_insert_options(struct ccid *ccid, struct sock *sk,
-					     struct sk_buff *skb)
+static inline int ccid_hc_rx_insert_options(struct ccid *ccid, struct sock *sk,
+					    struct sk_buff *skb)
+{
+	if (ccid->ccid_ops->ccid_hc_rx_insert_options != NULL)
+		return ccid->ccid_ops->ccid_hc_rx_insert_options(sk, skb);
+	return 0;
+}
+
+static inline void ccid_hc_rx_get_info(struct ccid *ccid, struct sock *sk,
+				       struct tcp_info *info)
 {
-	if (ccid->ccid_hc_tx_insert_options != NULL)
-		ccid->ccid_hc_tx_insert_options(sk, skb);
+	if (ccid->ccid_ops->ccid_hc_rx_get_info != NULL)
+		ccid->ccid_ops->ccid_hc_rx_get_info(sk, info);
 }
 
-static inline void ccid_hc_rx_insert_options(struct ccid *ccid, struct sock *sk,
-					     struct sk_buff *skb)
+static inline void ccid_hc_tx_get_info(struct ccid *ccid, struct sock *sk,
+				       struct tcp_info *info)
 {
-	if (ccid->ccid_hc_rx_insert_options != NULL)
-		ccid->ccid_hc_rx_insert_options(sk, skb);
+	if (ccid->ccid_ops->ccid_hc_tx_get_info != NULL)
+		ccid->ccid_ops->ccid_hc_tx_get_info(sk, info);
+}
+
+static inline int ccid_hc_rx_getsockopt(struct ccid *ccid, struct sock *sk,
+					const int optname, int len,
+					u32 __user *optval, int __user *optlen)
+{
+	int rc = -ENOPROTOOPT;
+	if (ccid->ccid_ops->ccid_hc_rx_getsockopt != NULL)
+		rc = ccid->ccid_ops->ccid_hc_rx_getsockopt(sk, optname, len,
+						 optval, optlen);
+	return rc;
+}
+
+static inline int ccid_hc_tx_getsockopt(struct ccid *ccid, struct sock *sk,
+					const int optname, int len,
+					u32 __user *optval, int __user *optlen)
+{
+	int rc = -ENOPROTOOPT;
+	if (ccid->ccid_ops->ccid_hc_tx_getsockopt != NULL)
+		rc = ccid->ccid_ops->ccid_hc_tx_getsockopt(sk, optname, len,
+						 optval, optlen);
+	return rc;
 }
 #endif /* _CCID_H */