Declare sctp_sched_ops structure and related functions
Signed-off-by: Yaogong Wang <ywang15@xxxxxxxx>
---
diff -uprN -X linux-2.6.32.8/Documentation/dontdiff
linux-2.6.32.8/include/net/sctp/structs.h
p1/include/net/sctp/structs.h
--- linux-2.6.32.8/include/net/sctp/structs.h 2010-02-09
04:57:19.000000000 -0800
+++ p1/include/net/sctp/structs.h 2010-05-28 10:33:12.000000000 -0700
@@ -320,6 +320,9 @@ struct sctp_sock {
/* Flags controlling Heartbeat, SACK delay, and Path MTU Discovery. */
__u32 param_flags;
+ /* Multistream scheduling */
+ const struct sctp_sched_ops *sched_ops;
+
struct sctp_initmsg initmsg;
struct sctp_rtoinfo rtoinfo;
struct sctp_paddrparams paddrparam;
@@ -534,6 +537,36 @@ static inline void sctp_ssn_skip(struct
}
/*
+ * Interface for adding new SCTP scheduling handlers
+ * This is similar to the pluggable TCP congestion control
+ */
+struct sctp_sched_ops {
+ struct list_head list;
+
+ /* initialize out_chunk_list (required) */
+ int (*init)(struct sctp_outq *q, gfp_t gfp);
+ /* cleanup out_chunk_list (required) */
+ void (*release)(struct sctp_outq *q);
+ /* enqueue head function (required) */
+ void (*enqueue_head_data)(struct sctp_outq *q, struct sctp_chunk *ch);
+ /* enqueue tail function (required) */
+ void (*enqueue_tail_data)(struct sctp_outq *q, struct sctp_chunk *ch);
+ /* dequeue function (required) */
+ struct sctp_chunk* (*dequeue_data)(struct sctp_outq *q);
+ /* is out_chunk_list empty? (required) */
+ int (*is_empty)(struct sctp_outq *q);
+
+ char name[SCTP_SCHED_NAME_MAX];
+ struct module *owner;
+};
+
+extern int sctp_register_sched(struct sctp_sched_ops *type);
+extern void sctp_unregister_sched(struct sctp_sched_ops *type);
+
+extern void sctp_cleanup_sched(struct sock *sk);
+extern int sctp_set_sched(struct sock *sk, const char *name);
+
+/*
* Pointers to address related SCTP functions.
* (i.e. things that depend on the address family.)
*/
@@ -1650,6 +1683,9 @@ struct sctp_association {
/* The largest timeout or RTO value to use in attempting an INIT */
unsigned long max_init_timeo;
+ /* Multistream scheduling */
+ const struct sctp_sched_ops *sched_ops;
+
/* Heartbeat interval: The endpoint sends out a Heartbeat chunk to
* the destination address every heartbeat interval. This value
* will be inherited by all new transports.
diff -uprN -X linux-2.6.32.8/Documentation/dontdiff
linux-2.6.32.8/include/net/sctp/user.h p1/include/net/sctp/user.h
--- linux-2.6.32.8/include/net/sctp/user.h 2010-02-09 04:57:19.000000000 -0800
+++ p1/include/net/sctp/user.h 2010-05-28 10:52:57.000000000 -0700
@@ -171,6 +171,8 @@ struct sctp_initmsg {
__u16 sinit_max_init_timeo;
};
+#define SCTP_SCHED_NAME_MAX 16
+
/*
* 5.2.2 SCTP Header Information Structure (SCTP_SNDRCV)
*
--
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