1 /* SCTP kernel implementation 2 * (C) Copyright Red Hat Inc. 2017 3 * 4 * These are definitions used by the stream schedulers, defined in RFC 5 * draft ndata (https://tools.ietf.org/html/draft-ietf-tsvwg-sctp-ndata-11) 6 * 7 * This SCTP implementation is free software; 8 * you can redistribute it and/or modify it under the terms of 9 * the GNU General Public License as published by 10 * the Free Software Foundation; either version 2, or (at your option) 11 * any later version. 12 * 13 * This SCTP implementation is distributed in the hope that it 14 * will be useful, but WITHOUT ANY WARRANTY; without even the implied 15 * ************************ 16 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 17 * See the GNU General Public License for more details. 18 * 19 * You should have received a copy of the GNU General Public License 20 * along with GNU CC; see the file COPYING. If not, see 21 * <http://www.gnu.org/licenses/>. 22 * 23 * Please send any bug reports or fixes you make to the 24 * email addresses: 25 * lksctp developers <linux-sctp@vger.kernel.org> 26 * 27 * Written or modified by: 28 * Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> 29 */ 30 31 #ifndef __sctp_stream_sched_h__ 32 #define __sctp_stream_sched_h__ 33 34 struct sctp_sched_ops { 35 /* Property handling for a given stream */ 36 int (*set)(struct sctp_stream *stream, __u16 sid, __u16 value, 37 gfp_t gfp); 38 int (*get)(struct sctp_stream *stream, __u16 sid, __u16 *value); 39 40 /* Init the specific scheduler */ 41 int (*init)(struct sctp_stream *stream); 42 /* Init a stream */ 43 int (*init_sid)(struct sctp_stream *stream, __u16 sid, gfp_t gfp); 44 /* Frees the entire thing */ 45 void (*free)(struct sctp_stream *stream); 46 47 /* Enqueue a chunk */ 48 void (*enqueue)(struct sctp_outq *q, struct sctp_datamsg *msg); 49 /* Dequeue a chunk */ 50 struct sctp_chunk *(*dequeue)(struct sctp_outq *q); 51 /* Called only if the chunk fit the packet */ 52 void (*dequeue_done)(struct sctp_outq *q, struct sctp_chunk *chunk); 53 /* Sched all chunks already enqueued */ 54 void (*sched_all)(struct sctp_stream *steam); 55 /* Unched all chunks already enqueued */ 56 void (*unsched_all)(struct sctp_stream *steam); 57 }; 58 59 int sctp_sched_set_sched(struct sctp_association *asoc, 60 enum sctp_sched_type sched); 61 int sctp_sched_get_sched(struct sctp_association *asoc); 62 int sctp_sched_set_value(struct sctp_association *asoc, __u16 sid, 63 __u16 value, gfp_t gfp); 64 int sctp_sched_get_value(struct sctp_association *asoc, __u16 sid, 65 __u16 *value); 66 void sctp_sched_dequeue_done(struct sctp_outq *q, struct sctp_chunk *ch); 67 68 void sctp_sched_dequeue_common(struct sctp_outq *q, struct sctp_chunk *ch); 69 int sctp_sched_init_sid(struct sctp_stream *stream, __u16 sid, gfp_t gfp); 70 struct sctp_sched_ops *sctp_sched_ops_from_stream(struct sctp_stream *stream); 71 72 void sctp_sched_ops_register(enum sctp_sched_type sched, 73 struct sctp_sched_ops *sched_ops); 74 void sctp_sched_ops_prio_init(void); 75 void sctp_sched_ops_rr_init(void); 76 77 #endif /* __sctp_stream_sched_h__ */ 78