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/* SPDX-License-Identifier: GPL-2.0-or-later */
/* SCTP kernel implementation
* (C) Copyright Red Hat Inc. 2017
*
* These are definitions used by the stream schedulers, defined in RFC
* draft ndata (https://tools.ietf.org/html/draft-ietf-tsvwg-sctp-ndata-11)
*
* Please send any bug reports or fixes you make to the
* email addresses:
* lksctp developers <linux-sctp@vger.kernel.org>
*
* Written or modified by:
* Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
*/
#ifndef __sctp_stream_sched_h__
#define __sctp_stream_sched_h__
struct sctp_sched_ops {
/* Property handling for a given stream */
int (*set)(struct sctp_stream *stream, __u16 sid, __u16 value,
gfp_t gfp);
int (*get)(struct sctp_stream *stream, __u16 sid, __u16 *value);
/* Init the specific scheduler */
int (*init)(struct sctp_stream *stream);
/* Init a stream */
int (*init_sid)(struct sctp_stream *stream, __u16 sid, gfp_t gfp);
/* Frees the entire thing */
void (*free)(struct sctp_stream *stream);
/* Enqueue a chunk */
void (*enqueue)(struct sctp_outq *q, struct sctp_datamsg *msg);
/* Dequeue a chunk */
struct sctp_chunk *(*dequeue)(struct sctp_outq *q);
/* Called only if the chunk fit the packet */
void (*dequeue_done)(struct sctp_outq *q, struct sctp_chunk *chunk);
/* Sched all chunks already enqueued */
void (*sched_all)(struct sctp_stream *steam);
/* Unched all chunks already enqueued */
void (*unsched_all)(struct sctp_stream *steam);
};
int sctp_sched_set_sched(struct sctp_association *asoc,
enum sctp_sched_type sched);
int sctp_sched_get_sched(struct sctp_association *asoc);
int sctp_sched_set_value(struct sctp_association *asoc, __u16 sid,
__u16 value, gfp_t gfp);
int sctp_sched_get_value(struct sctp_association *asoc, __u16 sid,
__u16 *value);
void sctp_sched_dequeue_done(struct sctp_outq *q, struct sctp_chunk *ch);
void sctp_sched_dequeue_common(struct sctp_outq *q, struct sctp_chunk *ch);
int sctp_sched_init_sid(struct sctp_stream *stream, __u16 sid, gfp_t gfp);
struct sctp_sched_ops *sctp_sched_ops_from_stream(struct sctp_stream *stream);
void sctp_sched_ops_register(enum sctp_sched_type sched,
struct sctp_sched_ops *sched_ops);
void sctp_sched_ops_prio_init(void);
void sctp_sched_ops_rr_init(void);
#endif /* __sctp_stream_sched_h__ */
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