Yaogong Wang wrote:
> 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
> }
>
BTW, is there a reason you decided to through the sched_ops into the association
and not the queue? I seems to make more sense to me to put one into the other.
-vlad
> /*
> + * 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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