1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* SCTP kernel implementation 3 * (C) Copyright Red Hat Inc. 2017 4 * 5 * These are definitions used by the stream schedulers, defined in RFC 6 * draft ndata (https://tools.ietf.org/html/draft-ietf-tsvwg-sctp-ndata-11) 7 * 8 * Please send any bug reports or fixes you make to the 9 * email addresses: 10 * lksctp developers <linux-sctp@vger.kernel.org> 11 * 12 * Written or modified by: 13 * Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> 14 */ 15 16 #ifndef __sctp_stream_sched_h__ 17 #define __sctp_stream_sched_h__ 18 19 struct sctp_sched_ops { 20 /* Property handling for a given stream */ 21 int (*set)(struct sctp_stream *stream, __u16 sid, __u16 value, 22 gfp_t gfp); 23 int (*get)(struct sctp_stream *stream, __u16 sid, __u16 *value); 24 25 /* Init the specific scheduler */ 26 int (*init)(struct sctp_stream *stream); 27 /* Init a stream */ 28 int (*init_sid)(struct sctp_stream *stream, __u16 sid, gfp_t gfp); 29 /* free a stream */ 30 void (*free_sid)(struct sctp_stream *stream, __u16 sid); 31 /* Frees the entire thing */ 32 void (*free)(struct sctp_stream *stream); 33 34 /* Enqueue a chunk */ 35 void (*enqueue)(struct sctp_outq *q, struct sctp_datamsg *msg); 36 /* Dequeue a chunk */ 37 struct sctp_chunk *(*dequeue)(struct sctp_outq *q); 38 /* Called only if the chunk fit the packet */ 39 void (*dequeue_done)(struct sctp_outq *q, struct sctp_chunk *chunk); 40 /* Sched all chunks already enqueued */ 41 void (*sched_all)(struct sctp_stream *steam); 42 /* Unched all chunks already enqueued */ 43 void (*unsched_all)(struct sctp_stream *steam); 44 }; 45 46 int sctp_sched_set_sched(struct sctp_association *asoc, 47 enum sctp_sched_type sched); 48 int sctp_sched_get_sched(struct sctp_association *asoc); 49 int sctp_sched_set_value(struct sctp_association *asoc, __u16 sid, 50 __u16 value, gfp_t gfp); 51 int sctp_sched_get_value(struct sctp_association *asoc, __u16 sid, 52 __u16 *value); 53 void sctp_sched_dequeue_done(struct sctp_outq *q, struct sctp_chunk *ch); 54 55 void sctp_sched_dequeue_common(struct sctp_outq *q, struct sctp_chunk *ch); 56 int sctp_sched_init_sid(struct sctp_stream *stream, __u16 sid, gfp_t gfp); 57 struct sctp_sched_ops *sctp_sched_ops_from_stream(struct sctp_stream *stream); 58 59 void sctp_sched_ops_register(enum sctp_sched_type sched, 60 struct sctp_sched_ops *sched_ops); 61 void sctp_sched_ops_prio_init(void); 62 void sctp_sched_ops_rr_init(void); 63 64 #endif /* __sctp_stream_sched_h__ */ 65