linux/net/sctp/stream_sched.c

// SPDX-License-Identifier: GPL-2.0-or-later
/* SCTP kernel implementation
 * (C) Copyright Red Hat Inc. 2017
 *
 * This file is part of the SCTP kernel implementation
 *
 * These functions manipulate sctp stream queue/scheduling.
 *
 * Please send any bug reports or fixes you make to the
 * email addresched(es):
 *    lksctp developers <[email protected]>
 *
 * Written or modified by:
 *    Marcelo Ricardo Leitner <[email protected]>
 */

#include <linux/list.h>
#include <net/sctp/sctp.h>
#include <net/sctp/sm.h>
#include <net/sctp/stream_sched.h>

/* First Come First Serve (a.k.a. FIFO)
 * RFC DRAFT ndata Section 3.1
 */
static int sctp_sched_fcfs_set(struct sctp_stream *stream, __u16 sid,
			       __u16 value, gfp_t gfp)
{ … }

static int sctp_sched_fcfs_get(struct sctp_stream *stream, __u16 sid,
			       __u16 *value)
{ … }

static int sctp_sched_fcfs_init(struct sctp_stream *stream)
{ … }

static int sctp_sched_fcfs_init_sid(struct sctp_stream *stream, __u16 sid,
				    gfp_t gfp)
{ … }

static void sctp_sched_fcfs_free_sid(struct sctp_stream *stream, __u16 sid)
{ … }

static void sctp_sched_fcfs_enqueue(struct sctp_outq *q,
				    struct sctp_datamsg *msg)
{ … }

static struct sctp_chunk *sctp_sched_fcfs_dequeue(struct sctp_outq *q)
{ … }

static void sctp_sched_fcfs_dequeue_done(struct sctp_outq *q,
					 struct sctp_chunk *chunk)
{ … }

static void sctp_sched_fcfs_sched_all(struct sctp_stream *stream)
{ … }

static void sctp_sched_fcfs_unsched_all(struct sctp_stream *stream)
{ … }

static struct sctp_sched_ops sctp_sched_fcfs = …;

static void sctp_sched_ops_fcfs_init(void)
{ … }

/* API to other parts of the stack */

static struct sctp_sched_ops *sctp_sched_ops[SCTP_SS_MAX + 1];

void sctp_sched_ops_register(enum sctp_sched_type sched,
			     struct sctp_sched_ops *sched_ops)
{ … }

void sctp_sched_ops_init(void)
{ … }

static void sctp_sched_free_sched(struct sctp_stream *stream)
{ … }

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)
{ … }

/* Auxiliary functions for the schedulers */
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)
{ … }