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-rw-r--r--src/network/tc/sfb.c107
1 files changed, 107 insertions, 0 deletions
diff --git a/src/network/tc/sfb.c b/src/network/tc/sfb.c
new file mode 100644
index 0000000..861c5fe
--- /dev/null
+++ b/src/network/tc/sfb.c
@@ -0,0 +1,107 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later
+ * Copyright © 2020 VMware, Inc. */
+
+#include <linux/pkt_sched.h>
+
+#include "alloc-util.h"
+#include "conf-parser.h"
+#include "netlink-util.h"
+#include "parse-util.h"
+#include "qdisc.h"
+#include "sfb.h"
+#include "string-util.h"
+
+static int stochastic_fair_blue_fill_message(Link *link, QDisc *qdisc, sd_netlink_message *req) {
+ StochasticFairBlue *sfb;
+ int r;
+
+ assert(link);
+ assert(qdisc);
+ assert(req);
+
+ assert_se(sfb = SFB(qdisc));
+
+ const struct tc_sfb_qopt opt = {
+ .rehash_interval = 600*1000,
+ .warmup_time = 60*1000,
+ .penalty_rate = 10,
+ .penalty_burst = 20,
+ .increment = (SFB_MAX_PROB + 1000) / 2000,
+ .decrement = (SFB_MAX_PROB + 10000) / 20000,
+ .max = 25,
+ .bin_size = 20,
+ .limit = sfb->packet_limit,
+ };
+
+ r = sd_netlink_message_open_container_union(req, TCA_OPTIONS, "sfb");
+ if (r < 0)
+ return r;
+
+ r = sd_netlink_message_append_data(req, TCA_SFB_PARMS, &opt, sizeof(opt));
+ if (r < 0)
+ return r;
+
+ r = sd_netlink_message_close_container(req);
+ if (r < 0)
+ return r;
+
+ return 0;
+}
+
+int config_parse_stochastic_fair_blue_u32(
+ const char *unit,
+ const char *filename,
+ unsigned line,
+ const char *section,
+ unsigned section_line,
+ const char *lvalue,
+ int ltype,
+ const char *rvalue,
+ void *data,
+ void *userdata) {
+
+ _cleanup_(qdisc_free_or_set_invalidp) QDisc *qdisc = NULL;
+ StochasticFairBlue *sfb;
+ Network *network = ASSERT_PTR(data);
+ int r;
+
+ assert(filename);
+ assert(lvalue);
+ assert(rvalue);
+
+ r = qdisc_new_static(QDISC_KIND_SFB, network, filename, section_line, &qdisc);
+ if (r == -ENOMEM)
+ return log_oom();
+ if (r < 0) {
+ log_syntax(unit, LOG_WARNING, filename, line, r,
+ "More than one kind of queueing discipline, ignoring assignment: %m");
+ return 0;
+ }
+
+ sfb = SFB(qdisc);
+
+ if (isempty(rvalue)) {
+ sfb->packet_limit = 0;
+
+ TAKE_PTR(qdisc);
+ return 0;
+ }
+
+ r = safe_atou32(rvalue, &sfb->packet_limit);
+ if (r < 0) {
+ log_syntax(unit, LOG_WARNING, filename, line, r,
+ "Failed to parse '%s=', ignoring assignment: %s",
+ lvalue, rvalue);
+ return 0;
+ }
+
+ TAKE_PTR(qdisc);
+
+ return 0;
+}
+
+const QDiscVTable sfb_vtable = {
+ .object_size = sizeof(StochasticFairBlue),
+ .tca_kind = "sfb",
+ .fill_message = stochastic_fair_blue_fill_message,
+};