stream_sched.c (552c69b36ebd966186573b9c7a286b390935cce1) stream_sched.c (05364ca03cfd419caecb292fede20eb39667eaae)
1/* SCTP kernel implementation
2 * (C) Copyright Red Hat Inc. 2017
3 *
4 * This file is part of the SCTP kernel implementation
5 *
6 * These functions manipulate sctp stream queue/scheduling.
7 *
8 * This SCTP implementation is free software;

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156 if (sched > SCTP_SS_MAX)
157 return -EINVAL;
158
159 if (old) {
160 old->free(&asoc->stream);
161
162 /* Give the next scheduler a clean slate. */
163 for (i = 0; i < asoc->stream.outcnt; i++) {
1/* SCTP kernel implementation
2 * (C) Copyright Red Hat Inc. 2017
3 *
4 * This file is part of the SCTP kernel implementation
5 *
6 * These functions manipulate sctp stream queue/scheduling.
7 *
8 * This SCTP implementation is free software;

--- 147 unchanged lines hidden (view full) ---

156 if (sched > SCTP_SS_MAX)
157 return -EINVAL;
158
159 if (old) {
160 old->free(&asoc->stream);
161
162 /* Give the next scheduler a clean slate. */
163 for (i = 0; i < asoc->stream.outcnt; i++) {
164 void *p = asoc->stream.out[i].ext;
164 void *p = SCTP_SO(&asoc->stream, i)->ext;
165
166 if (!p)
167 continue;
168
169 p += offsetofend(struct sctp_stream_out_ext, outq);
170 memset(p, 0, sizeof(struct sctp_stream_out_ext) -
171 offsetofend(struct sctp_stream_out_ext, outq));
172 }
173 }
174
175 asoc->outqueue.sched = n;
176 n->init(&asoc->stream);
177 for (i = 0; i < asoc->stream.outcnt; i++) {
165
166 if (!p)
167 continue;
168
169 p += offsetofend(struct sctp_stream_out_ext, outq);
170 memset(p, 0, sizeof(struct sctp_stream_out_ext) -
171 offsetofend(struct sctp_stream_out_ext, outq));
172 }
173 }
174
175 asoc->outqueue.sched = n;
176 n->init(&asoc->stream);
177 for (i = 0; i < asoc->stream.outcnt; i++) {
178 if (!asoc->stream.out[i].ext)
178 if (!SCTP_SO(&asoc->stream, i)->ext)
179 continue;
180
181 ret = n->init_sid(&asoc->stream, i, GFP_KERNEL);
182 if (ret)
183 goto err;
184 }
185
186 /* We have to requeue all chunks already queued. */

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212}
213
214int sctp_sched_set_value(struct sctp_association *asoc, __u16 sid,
215 __u16 value, gfp_t gfp)
216{
217 if (sid >= asoc->stream.outcnt)
218 return -EINVAL;
219
179 continue;
180
181 ret = n->init_sid(&asoc->stream, i, GFP_KERNEL);
182 if (ret)
183 goto err;
184 }
185
186 /* We have to requeue all chunks already queued. */

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212}
213
214int sctp_sched_set_value(struct sctp_association *asoc, __u16 sid,
215 __u16 value, gfp_t gfp)
216{
217 if (sid >= asoc->stream.outcnt)
218 return -EINVAL;
219
220 if (!asoc->stream.out[sid].ext) {
220 if (!SCTP_SO(&asoc->stream, sid)->ext) {
221 int ret;
222
223 ret = sctp_stream_init_ext(&asoc->stream, sid);
224 if (ret)
225 return ret;
226 }
227
228 return asoc->outqueue.sched->set(&asoc->stream, sid, value, gfp);
229}
230
231int sctp_sched_get_value(struct sctp_association *asoc, __u16 sid,
232 __u16 *value)
233{
234 if (sid >= asoc->stream.outcnt)
235 return -EINVAL;
236
221 int ret;
222
223 ret = sctp_stream_init_ext(&asoc->stream, sid);
224 if (ret)
225 return ret;
226 }
227
228 return asoc->outqueue.sched->set(&asoc->stream, sid, value, gfp);
229}
230
231int sctp_sched_get_value(struct sctp_association *asoc, __u16 sid,
232 __u16 *value)
233{
234 if (sid >= asoc->stream.outcnt)
235 return -EINVAL;
236
237 if (!asoc->stream.out[sid].ext)
237 if (!SCTP_SO(&asoc->stream, sid)->ext)
238 return 0;
239
240 return asoc->outqueue.sched->get(&asoc->stream, sid, value);
241}
242
243void sctp_sched_dequeue_done(struct sctp_outq *q, struct sctp_chunk *ch)
244{
245 if (!list_is_last(&ch->frag_list, &ch->msg->chunks) &&
246 !q->asoc->intl_enable) {
247 struct sctp_stream_out *sout;
248 __u16 sid;
249
250 /* datamsg is not finish, so save it as current one,
251 * in case application switch scheduler or a higher
252 * priority stream comes in.
253 */
254 sid = sctp_chunk_stream_no(ch);
238 return 0;
239
240 return asoc->outqueue.sched->get(&asoc->stream, sid, value);
241}
242
243void sctp_sched_dequeue_done(struct sctp_outq *q, struct sctp_chunk *ch)
244{
245 if (!list_is_last(&ch->frag_list, &ch->msg->chunks) &&
246 !q->asoc->intl_enable) {
247 struct sctp_stream_out *sout;
248 __u16 sid;
249
250 /* datamsg is not finish, so save it as current one,
251 * in case application switch scheduler or a higher
252 * priority stream comes in.
253 */
254 sid = sctp_chunk_stream_no(ch);
255 sout = &q->asoc->stream.out[sid];
255 sout = SCTP_SO(&q->asoc->stream, sid);
256 q->asoc->stream.out_curr = sout;
257 return;
258 }
259
260 q->asoc->stream.out_curr = NULL;
261 q->sched->dequeue_done(q, ch);
262}
263
264/* Auxiliary functions for the schedulers */
265void sctp_sched_dequeue_common(struct sctp_outq *q, struct sctp_chunk *ch)
266{
267 list_del_init(&ch->list);
268 list_del_init(&ch->stream_list);
269 q->out_qlen -= ch->skb->len;
270}
271
272int sctp_sched_init_sid(struct sctp_stream *stream, __u16 sid, gfp_t gfp)
273{
274 struct sctp_sched_ops *sched = sctp_sched_ops_from_stream(stream);
256 q->asoc->stream.out_curr = sout;
257 return;
258 }
259
260 q->asoc->stream.out_curr = NULL;
261 q->sched->dequeue_done(q, ch);
262}
263
264/* Auxiliary functions for the schedulers */
265void sctp_sched_dequeue_common(struct sctp_outq *q, struct sctp_chunk *ch)
266{
267 list_del_init(&ch->list);
268 list_del_init(&ch->stream_list);
269 q->out_qlen -= ch->skb->len;
270}
271
272int sctp_sched_init_sid(struct sctp_stream *stream, __u16 sid, gfp_t gfp)
273{
274 struct sctp_sched_ops *sched = sctp_sched_ops_from_stream(stream);
275 struct sctp_stream_out_ext *ext = SCTP_SO(stream, sid)->ext;
275
276
276 INIT_LIST_HEAD(&stream->out[sid].ext->outq);
277 INIT_LIST_HEAD(&ext->outq);
277 return sched->init_sid(stream, sid, gfp);
278}
279
280struct sctp_sched_ops *sctp_sched_ops_from_stream(struct sctp_stream *stream)
281{
282 struct sctp_association *asoc;
283
284 asoc = container_of(stream, struct sctp_association, stream);
285
286 return asoc->outqueue.sched;
287}
278 return sched->init_sid(stream, sid, gfp);
279}
280
281struct sctp_sched_ops *sctp_sched_ops_from_stream(struct sctp_stream *stream)
282{
283 struct sctp_association *asoc;
284
285 asoc = container_of(stream, struct sctp_association, stream);
286
287 return asoc->outqueue.sched;
288}