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| 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 | |
| 32 | /* Enqueue a chunk */ |
| 33 | void (*enqueue)(struct sctp_outq *q, struct sctp_datamsg *msg); |
| 34 | /* Dequeue a chunk */ |
| 35 | struct sctp_chunk *(*dequeue)(struct sctp_outq *q); |
| 36 | /* Called only if the chunk fit the packet */ |
| 37 | void (*dequeue_done)(struct sctp_outq *q, struct sctp_chunk *chunk); |
| 38 | /* Sched all chunks already enqueued */ |
| 39 | void (*sched_all)(struct sctp_stream *steam); |
| 40 | /* Unched all chunks already enqueued */ |
| 41 | void (*unsched_all)(struct sctp_stream *steam); |
| 42 | }; |
| 43 | |
| 44 | int sctp_sched_set_sched(struct sctp_association *asoc, |
| 45 | enum sctp_sched_type sched); |
| 46 | int sctp_sched_get_sched(struct sctp_association *asoc); |
| 47 | int sctp_sched_set_value(struct sctp_association *asoc, __u16 sid, |
| 48 | __u16 value, gfp_t gfp); |
| 49 | int sctp_sched_get_value(struct sctp_association *asoc, __u16 sid, |
| 50 | __u16 *value); |
| 51 | void sctp_sched_dequeue_done(struct sctp_outq *q, struct sctp_chunk *ch); |
| 52 | |
| 53 | void sctp_sched_dequeue_common(struct sctp_outq *q, struct sctp_chunk *ch); |
| 54 | int sctp_sched_init_sid(struct sctp_stream *stream, __u16 sid, gfp_t gfp); |
| 55 | struct sctp_sched_ops *sctp_sched_ops_from_stream(struct sctp_stream *stream); |
| 56 | |
| 57 | void sctp_sched_ops_register(enum sctp_sched_type sched, |
| 58 | struct sctp_sched_ops *sched_ops); |
| 59 | void sctp_sched_ops_prio_init(void); |
| 60 | void sctp_sched_ops_rr_init(void); |
| 61 | void sctp_sched_ops_fc_init(void); |
| 62 | void sctp_sched_ops_wfq_init(void); |
| 63 | |
| 64 | #endif /* __sctp_stream_sched_h__ */ |
| 65 |
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