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head/sys/netinet/cc/cc.h

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* University Research Program Fund at Community Foundation Silicon Valley. * University Research Program Fund at Community Foundation Silicon Valley.
* More details are available at: * More details are available at:
* http://caia.swin.edu.au/urp/newtcp/ * http://caia.swin.edu.au/urp/newtcp/
*/ */
#ifndef _NETINET_CC_CC_H_ #ifndef _NETINET_CC_CC_H_
#define _NETINET_CC_CC_H_ #define _NETINET_CC_CC_H_
#if !defined(_KERNEL) #ifdef _KERNEL
#error "no user-serviceable parts inside"
#endif
/* Global CC vars. */ /* Global CC vars. */
extern STAILQ_HEAD(cc_head, cc_algo) cc_list; extern STAILQ_HEAD(cc_head, cc_algo) cc_list;
extern const int tcprexmtthresh; extern const int tcprexmtthresh;
extern struct cc_algo newreno_cc_algo; extern struct cc_algo newreno_cc_algo;
/* Per-netstack bits. */ /* Per-netstack bits. */
VNET_DECLARE(struct cc_algo *, default_cc_ptr); VNET_DECLARE(struct cc_algo *, default_cc_ptr);
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#define CCF_IPHDR_CE 0x0010 /* Does this packet set CE bit? */ #define CCF_IPHDR_CE 0x0010 /* Does this packet set CE bit? */
#define CCF_TCPHDR_CWR 0x0020 /* Does this packet set CWR bit? */ #define CCF_TCPHDR_CWR 0x0020 /* Does this packet set CWR bit? */
/* ACK types passed to the ack_received() hook. */ /* ACK types passed to the ack_received() hook. */
#define CC_ACK 0x0001 /* Regular in sequence ACK. */ #define CC_ACK 0x0001 /* Regular in sequence ACK. */
#define CC_DUPACK 0x0002 /* Duplicate ACK. */ #define CC_DUPACK 0x0002 /* Duplicate ACK. */
#define CC_PARTIALACK 0x0004 /* Not yet. */ #define CC_PARTIALACK 0x0004 /* Not yet. */
#define CC_SACK 0x0008 /* Not yet. */ #define CC_SACK 0x0008 /* Not yet. */
#endif /* _KERNEL */
/* /*
* Congestion signal types passed to the cong_signal() hook. The highest order 8 * Congestion signal types passed to the cong_signal() hook. The highest order 8
* bits (0x01000000 - 0x80000000) are reserved for CC algos to declare their own * bits (0x01000000 - 0x80000000) are reserved for CC algos to declare their own
* congestion signal types. * congestion signal types.
*/ */
#define CC_ECN 0x00000001 /* ECN marked packet received. */ #define CC_ECN 0x00000001 /* ECN marked packet received. */
#define CC_RTO 0x00000002 /* RTO fired. */ #define CC_RTO 0x00000002 /* RTO fired. */
#define CC_RTO_ERR 0x00000004 /* RTO fired in error. */ #define CC_RTO_ERR 0x00000004 /* RTO fired in error. */
#define CC_NDUPACK 0x00000008 /* Threshold of dupack's reached. */ #define CC_NDUPACK 0x00000008 /* Threshold of dupack's reached. */
#define CC_SIGPRIVMASK 0xFF000000 /* Mask to check if sig is private. */ #define CC_SIGPRIVMASK 0xFF000000 /* Mask to check if sig is private. */
#ifdef _KERNEL
/* /*
* Structure to hold data and function pointers that together represent a * Structure to hold data and function pointers that together represent a
* congestion control algorithm. * congestion control algorithm.
*/ */
struct cc_algo { struct cc_algo {
char name[TCP_CA_NAME_MAX]; char name[TCP_CA_NAME_MAX];
/* Init global module state on kldload. */ /* Init global module state on kldload. */
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#define CC_LIST_RLOCK() rw_rlock(&cc_list_lock) #define CC_LIST_RLOCK() rw_rlock(&cc_list_lock)
#define CC_LIST_RUNLOCK() rw_runlock(&cc_list_lock) #define CC_LIST_RUNLOCK() rw_runlock(&cc_list_lock)
#define CC_LIST_WLOCK() rw_wlock(&cc_list_lock) #define CC_LIST_WLOCK() rw_wlock(&cc_list_lock)
#define CC_LIST_WUNLOCK() rw_wunlock(&cc_list_lock) #define CC_LIST_WUNLOCK() rw_wunlock(&cc_list_lock)
#define CC_LIST_LOCK_ASSERT() rw_assert(&cc_list_lock, RA_LOCKED) #define CC_LIST_LOCK_ASSERT() rw_assert(&cc_list_lock, RA_LOCKED)
#define CC_ALGOOPT_LIMIT 2048 #define CC_ALGOOPT_LIMIT 2048
#endif /* _KERNEL */
#endif /* _NETINET_CC_CC_H_ */ #endif /* _NETINET_CC_CC_H_ */