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authorSander Vrijders <sander.vrijders@ugent.be>2018-10-05 10:24:01 +0200
committerDimitri Staessens <dimitri.staessens@ugent.be>2018-10-05 10:35:25 +0200
commit5d11a6ad590133c92925c6162eb47b4401f16bef (patch)
tree6f73939f27f06cc575e1a90be8271172aa1362d8 /src/ipcpd/normal/packet_sched.c
parentae64a71552b956a2b6d77ecdbd5978043da1150f (diff)
downloadouroboros-5d11a6ad590133c92925c6162eb47b4401f16bef.tar.gz
ouroboros-5d11a6ad590133c92925c6162eb47b4401f16bef.zip
ipcpd, lib, irmd, tools: Change SDU to packet
This will change SDU (Service Data Unit) to packet everywhere. SDU is OSI terminology, whereas packet is Ouroboros terminology. Signed-off-by: Sander Vrijders <sander.vrijders@ugent.be> Signed-off-by: Dimitri Staessens <dimitri.staessens@ugent.be>
Diffstat (limited to 'src/ipcpd/normal/packet_sched.c')
-rw-r--r--src/ipcpd/normal/packet_sched.c241
1 files changed, 241 insertions, 0 deletions
diff --git a/src/ipcpd/normal/packet_sched.c b/src/ipcpd/normal/packet_sched.c
new file mode 100644
index 00000000..fc01fb32
--- /dev/null
+++ b/src/ipcpd/normal/packet_sched.c
@@ -0,0 +1,241 @@
+/*
+ * Ouroboros - Copyright (C) 2016 - 2018
+ *
+ * Packet scheduler component
+ *
+ * Dimitri Staessens <dimitri.staessens@ugent.be>
+ * Sander Vrijders <sander.vrijders@ugent.be>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., http://www.fsf.org/about/contact/.
+ */
+
+#if defined(__linux__) || defined(__CYGWIN__)
+#define _DEFAULT_SOURCE
+#else
+#define _POSIX_C_SOURCE 200112L
+#endif
+
+#include "config.h"
+
+#include <ouroboros/errno.h>
+#include <ouroboros/notifier.h>
+
+#include "ipcp.h"
+#include "packet_sched.h"
+#include "connmgr.h"
+
+#include <assert.h>
+#include <sched.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <string.h>
+
+static int qos_prio [] = {
+ QOS_PRIO_RAW,
+ QOS_PRIO_BE,
+ QOS_PRIO_VIDEO,
+ QOS_PRIO_VOICE,
+ QOS_PRIO_DATA
+};
+
+struct packet_sched {
+ fset_t * set[QOS_CUBE_MAX];
+ next_packet_fn_t callback;
+ pthread_t readers[QOS_CUBE_MAX * IPCP_SCHED_THR_MUL];
+};
+
+struct sched_info {
+ struct packet_sched * sch;
+ qoscube_t qc;
+};
+
+static void cleanup_reader(void * o)
+{
+ fqueue_destroy((fqueue_t *) o);
+}
+
+static void * packet_reader(void * o)
+{
+ struct packet_sched * sched;
+ struct shm_du_buff * sdb;
+ int fd;
+ fqueue_t * fq;
+ qoscube_t qc;
+
+ sched = ((struct sched_info *) o)->sch;
+ qc = ((struct sched_info *) o)->qc;
+
+ ipcp_lock_to_core();
+
+ free(o);
+
+ fq = fqueue_create();
+ if (fq == NULL)
+ return (void *) -1;
+
+ pthread_cleanup_push(cleanup_reader, fq);
+
+ while (true) {
+ int ret = fevent(sched->set[qc], fq, NULL);
+ if (ret < 0)
+ continue;
+
+ while ((fd = fqueue_next(fq)) >= 0) {
+ switch (fqueue_type(fq)) {
+ case FLOW_DEALLOC:
+ notifier_event(NOTIFY_DT_FLOW_DEALLOC, &fd);
+ break;
+ case FLOW_DOWN:
+ notifier_event(NOTIFY_DT_FLOW_DOWN, &fd);
+ break;
+ case FLOW_UP:
+ notifier_event(NOTIFY_DT_FLOW_UP, &fd);
+ break;
+ case FLOW_PKT:
+ if (ipcp_flow_read(fd, &sdb))
+ continue;
+
+ sched->callback(fd, qc, sdb);
+ break;
+ default:
+ break;
+ }
+ }
+ }
+
+ pthread_cleanup_pop(true);
+
+ return (void *) 0;
+}
+
+struct packet_sched * packet_sched_create(next_packet_fn_t callback)
+{
+ struct packet_sched * packet_sched;
+ struct sched_info * infos[QOS_CUBE_MAX * IPCP_SCHED_THR_MUL];
+ int i;
+ int j;
+
+ assert(callback);
+
+ packet_sched = malloc(sizeof(*packet_sched));
+ if (packet_sched == NULL)
+ goto fail_malloc;
+
+ packet_sched->callback = callback;
+
+ for (i = 0; i < QOS_CUBE_MAX; ++i) {
+ packet_sched->set[i] = fset_create();
+ if (packet_sched->set[i] == NULL) {
+ for (j = 0; j < i; ++j)
+ fset_destroy(packet_sched->set[j]);
+ goto fail_flow_set;
+ }
+ }
+
+ for (i = 0; i < QOS_CUBE_MAX * IPCP_SCHED_THR_MUL; ++i) {
+ infos[i] = malloc(sizeof(*infos[i]));
+ if (infos[i] == NULL) {
+ for (j = 0; j < i; ++j)
+ free(infos[j]);
+ goto fail_infos;
+ }
+ infos[i]->sch = packet_sched;
+ infos[i]->qc = i % QOS_CUBE_MAX;
+ }
+
+ for (i = 0; i < QOS_CUBE_MAX * IPCP_SCHED_THR_MUL; ++i) {
+ if (pthread_create(&packet_sched->readers[i], NULL,
+ packet_reader, infos[i])) {
+ for (j = 0; j < i; ++j)
+ pthread_cancel(packet_sched->readers[j]);
+ for (j = 0; j < i; ++j)
+ pthread_join(packet_sched->readers[j], NULL);
+ for (j = i; j < QOS_CUBE_MAX * IPCP_SCHED_THR_MUL; ++j)
+ free(infos[i]);
+ goto fail_infos;
+ }
+ }
+
+ for (i = 0; i < QOS_CUBE_MAX * IPCP_SCHED_THR_MUL; ++i) {
+ struct sched_param par;
+ int pol = SCHED_RR;
+ int min;
+ int max;
+
+ min = sched_get_priority_min(pol);
+ max = sched_get_priority_max(pol);
+
+ min = (max - min) / 2;
+
+ par.sched_priority = min +
+ (qos_prio[i % QOS_CUBE_MAX] * (max - min) / 99);
+
+ if (pthread_setschedparam(packet_sched->readers[i], pol, &par))
+ goto fail_sched;
+ }
+
+ return packet_sched;
+
+ fail_sched:
+ for (j = 0; j < QOS_CUBE_MAX * IPCP_SCHED_THR_MUL; ++j)
+ pthread_cancel(packet_sched->readers[j]);
+ for (j = 0; j < QOS_CUBE_MAX * IPCP_SCHED_THR_MUL; ++j)
+ pthread_join(packet_sched->readers[j], NULL);
+ fail_infos:
+ for (j = 0; j < QOS_CUBE_MAX; ++j)
+ fset_destroy(packet_sched->set[j]);
+ fail_flow_set:
+ free(packet_sched);
+ fail_malloc:
+ return NULL;
+}
+
+void packet_sched_destroy(struct packet_sched * packet_sched)
+{
+ int i;
+
+ assert(packet_sched);
+
+ for (i = 0; i < QOS_CUBE_MAX * IPCP_SCHED_THR_MUL; ++i) {
+ pthread_cancel(packet_sched->readers[i]);
+ pthread_join(packet_sched->readers[i], NULL);
+ }
+
+ for (i = 0; i < QOS_CUBE_MAX; ++i)
+ fset_destroy(packet_sched->set[i]);
+
+ free(packet_sched);
+}
+
+void packet_sched_add(struct packet_sched * packet_sched,
+ int fd)
+{
+ qoscube_t qc;
+
+ assert(packet_sched);
+
+ ipcp_flow_get_qoscube(fd, &qc);
+ fset_add(packet_sched->set[qc], fd);
+}
+
+void packet_sched_del(struct packet_sched * packet_sched,
+ int fd)
+{
+ qoscube_t qc;
+
+ assert(packet_sched);
+
+ ipcp_flow_get_qoscube(fd, &qc);
+ fset_del(packet_sched->set[qc], fd);
+}