This source file includes following definitions.
- sctp_sched_fcfs_set
- sctp_sched_fcfs_get
- sctp_sched_fcfs_init
- sctp_sched_fcfs_init_sid
- sctp_sched_fcfs_free
- sctp_sched_fcfs_enqueue
- sctp_sched_fcfs_dequeue
- sctp_sched_fcfs_dequeue_done
- sctp_sched_fcfs_sched_all
- sctp_sched_fcfs_unsched_all
- sctp_sched_ops_fcfs_init
- sctp_sched_ops_register
- sctp_sched_ops_init
- sctp_sched_set_sched
- sctp_sched_get_sched
- sctp_sched_set_value
- sctp_sched_get_value
- sctp_sched_dequeue_done
- sctp_sched_dequeue_common
- sctp_sched_init_sid
- sctp_sched_ops_from_stream
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17 #include <linux/list.h>
18 #include <net/sctp/sctp.h>
19 #include <net/sctp/sm.h>
20 #include <net/sctp/stream_sched.h>
21
22
23
24
25 static int sctp_sched_fcfs_set(struct sctp_stream *stream, __u16 sid,
26 __u16 value, gfp_t gfp)
27 {
28 return 0;
29 }
30
31 static int sctp_sched_fcfs_get(struct sctp_stream *stream, __u16 sid,
32 __u16 *value)
33 {
34 *value = 0;
35 return 0;
36 }
37
38 static int sctp_sched_fcfs_init(struct sctp_stream *stream)
39 {
40 return 0;
41 }
42
43 static int sctp_sched_fcfs_init_sid(struct sctp_stream *stream, __u16 sid,
44 gfp_t gfp)
45 {
46 return 0;
47 }
48
49 static void sctp_sched_fcfs_free(struct sctp_stream *stream)
50 {
51 }
52
53 static void sctp_sched_fcfs_enqueue(struct sctp_outq *q,
54 struct sctp_datamsg *msg)
55 {
56 }
57
58 static struct sctp_chunk *sctp_sched_fcfs_dequeue(struct sctp_outq *q)
59 {
60 struct sctp_stream *stream = &q->asoc->stream;
61 struct sctp_chunk *ch = NULL;
62 struct list_head *entry;
63
64 if (list_empty(&q->out_chunk_list))
65 goto out;
66
67 if (stream->out_curr) {
68 ch = list_entry(stream->out_curr->ext->outq.next,
69 struct sctp_chunk, stream_list);
70 } else {
71 entry = q->out_chunk_list.next;
72 ch = list_entry(entry, struct sctp_chunk, list);
73 }
74
75 sctp_sched_dequeue_common(q, ch);
76
77 out:
78 return ch;
79 }
80
81 static void sctp_sched_fcfs_dequeue_done(struct sctp_outq *q,
82 struct sctp_chunk *chunk)
83 {
84 }
85
86 static void sctp_sched_fcfs_sched_all(struct sctp_stream *stream)
87 {
88 }
89
90 static void sctp_sched_fcfs_unsched_all(struct sctp_stream *stream)
91 {
92 }
93
94 static struct sctp_sched_ops sctp_sched_fcfs = {
95 .set = sctp_sched_fcfs_set,
96 .get = sctp_sched_fcfs_get,
97 .init = sctp_sched_fcfs_init,
98 .init_sid = sctp_sched_fcfs_init_sid,
99 .free = sctp_sched_fcfs_free,
100 .enqueue = sctp_sched_fcfs_enqueue,
101 .dequeue = sctp_sched_fcfs_dequeue,
102 .dequeue_done = sctp_sched_fcfs_dequeue_done,
103 .sched_all = sctp_sched_fcfs_sched_all,
104 .unsched_all = sctp_sched_fcfs_unsched_all,
105 };
106
107 static void sctp_sched_ops_fcfs_init(void)
108 {
109 sctp_sched_ops_register(SCTP_SS_FCFS, &sctp_sched_fcfs);
110 }
111
112
113
114 static struct sctp_sched_ops *sctp_sched_ops[SCTP_SS_MAX + 1];
115
116 void sctp_sched_ops_register(enum sctp_sched_type sched,
117 struct sctp_sched_ops *sched_ops)
118 {
119 sctp_sched_ops[sched] = sched_ops;
120 }
121
122 void sctp_sched_ops_init(void)
123 {
124 sctp_sched_ops_fcfs_init();
125 sctp_sched_ops_prio_init();
126 sctp_sched_ops_rr_init();
127 }
128
129 int sctp_sched_set_sched(struct sctp_association *asoc,
130 enum sctp_sched_type sched)
131 {
132 struct sctp_sched_ops *n = sctp_sched_ops[sched];
133 struct sctp_sched_ops *old = asoc->outqueue.sched;
134 struct sctp_datamsg *msg = NULL;
135 struct sctp_chunk *ch;
136 int i, ret = 0;
137
138 if (old == n)
139 return ret;
140
141 if (sched > SCTP_SS_MAX)
142 return -EINVAL;
143
144 if (old) {
145 old->free(&asoc->stream);
146
147
148 for (i = 0; i < asoc->stream.outcnt; i++) {
149 void *p = SCTP_SO(&asoc->stream, i)->ext;
150
151 if (!p)
152 continue;
153
154 p += offsetofend(struct sctp_stream_out_ext, outq);
155 memset(p, 0, sizeof(struct sctp_stream_out_ext) -
156 offsetofend(struct sctp_stream_out_ext, outq));
157 }
158 }
159
160 asoc->outqueue.sched = n;
161 n->init(&asoc->stream);
162 for (i = 0; i < asoc->stream.outcnt; i++) {
163 if (!SCTP_SO(&asoc->stream, i)->ext)
164 continue;
165
166 ret = n->init_sid(&asoc->stream, i, GFP_KERNEL);
167 if (ret)
168 goto err;
169 }
170
171
172 list_for_each_entry(ch, &asoc->outqueue.out_chunk_list, list) {
173 if (ch->msg == msg)
174 continue;
175 msg = ch->msg;
176 n->enqueue(&asoc->outqueue, msg);
177 }
178
179 return ret;
180
181 err:
182 n->free(&asoc->stream);
183 asoc->outqueue.sched = &sctp_sched_fcfs;
184
185 return ret;
186 }
187
188 int sctp_sched_get_sched(struct sctp_association *asoc)
189 {
190 int i;
191
192 for (i = 0; i <= SCTP_SS_MAX; i++)
193 if (asoc->outqueue.sched == sctp_sched_ops[i])
194 return i;
195
196 return 0;
197 }
198
199 int sctp_sched_set_value(struct sctp_association *asoc, __u16 sid,
200 __u16 value, gfp_t gfp)
201 {
202 if (sid >= asoc->stream.outcnt)
203 return -EINVAL;
204
205 if (!SCTP_SO(&asoc->stream, sid)->ext) {
206 int ret;
207
208 ret = sctp_stream_init_ext(&asoc->stream, sid);
209 if (ret)
210 return ret;
211 }
212
213 return asoc->outqueue.sched->set(&asoc->stream, sid, value, gfp);
214 }
215
216 int sctp_sched_get_value(struct sctp_association *asoc, __u16 sid,
217 __u16 *value)
218 {
219 if (sid >= asoc->stream.outcnt)
220 return -EINVAL;
221
222 if (!SCTP_SO(&asoc->stream, sid)->ext)
223 return 0;
224
225 return asoc->outqueue.sched->get(&asoc->stream, sid, value);
226 }
227
228 void sctp_sched_dequeue_done(struct sctp_outq *q, struct sctp_chunk *ch)
229 {
230 if (!list_is_last(&ch->frag_list, &ch->msg->chunks) &&
231 !q->asoc->peer.intl_capable) {
232 struct sctp_stream_out *sout;
233 __u16 sid;
234
235
236
237
238
239 sid = sctp_chunk_stream_no(ch);
240 sout = SCTP_SO(&q->asoc->stream, sid);
241 q->asoc->stream.out_curr = sout;
242 return;
243 }
244
245 q->asoc->stream.out_curr = NULL;
246 q->sched->dequeue_done(q, ch);
247 }
248
249
250 void sctp_sched_dequeue_common(struct sctp_outq *q, struct sctp_chunk *ch)
251 {
252 list_del_init(&ch->list);
253 list_del_init(&ch->stream_list);
254 q->out_qlen -= ch->skb->len;
255 }
256
257 int sctp_sched_init_sid(struct sctp_stream *stream, __u16 sid, gfp_t gfp)
258 {
259 struct sctp_sched_ops *sched = sctp_sched_ops_from_stream(stream);
260 struct sctp_stream_out_ext *ext = SCTP_SO(stream, sid)->ext;
261
262 INIT_LIST_HEAD(&ext->outq);
263 return sched->init_sid(stream, sid, gfp);
264 }
265
266 struct sctp_sched_ops *sctp_sched_ops_from_stream(struct sctp_stream *stream)
267 {
268 struct sctp_association *asoc;
269
270 asoc = container_of(stream, struct sctp_association, stream);
271
272 return asoc->outqueue.sched;
273 }