1 files changed, 183 insertions, 0 deletions
diff --git a/src/network/tc/fifo.c b/src/network/tc/fifo.c
new file mode 100644
index 0000000..940fa00
--- /dev/null
+++ b/src/network/tc/fifo.c
@@ -0,0 +1,183 @@
+/* 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 "fifo.h"
+#include "netlink-util.h"
+#include "parse-util.h"
+#include "string-util.h"
+
+static int fifo_fill_message(Link *link, QDisc *qdisc, sd_netlink_message *req) {
+        FirstInFirstOut *fifo;
+        int r;
+
+        assert(link);
+        assert(qdisc);
+        assert(req);
+
+        switch (qdisc->kind) {
+        case QDISC_KIND_PFIFO:
+                assert_se(fifo = PFIFO(qdisc));
+                break;
+        case QDISC_KIND_BFIFO:
+                assert_se(fifo = BFIFO(qdisc));
+                break;
+        case QDISC_KIND_PFIFO_HEAD_DROP:
+                assert_se(fifo = PFIFO_HEAD_DROP(qdisc));
+                break;
+        default:
+                assert_not_reached();
+        }
+
+        const struct tc_fifo_qopt opt = { .limit = fifo->limit };
+        r = sd_netlink_message_append_data(req, TCA_OPTIONS, &opt, sizeof(opt));
+        if (r < 0)
+                return r;
+
+        return 0;
+}
+
+int config_parse_pfifo_size(
+                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;
+        Network *network = ASSERT_PTR(data);
+        FirstInFirstOut *fifo;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = qdisc_new_static(ltype, 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;
+        }
+
+        switch (qdisc->kind) {
+        case QDISC_KIND_PFIFO:
+                fifo = PFIFO(qdisc);
+                break;
+        case QDISC_KIND_PFIFO_HEAD_DROP:
+                fifo = PFIFO_HEAD_DROP(qdisc);
+                break;
+        default:
+                assert_not_reached();
+        }
+
+        if (isempty(rvalue)) {
+                fifo->limit = 0;
+
+                TAKE_PTR(qdisc);
+                return 0;
+        }
+
+        r = safe_atou32(rvalue, &fifo->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;
+}
+
+int config_parse_bfifo_size(
+                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;
+        Network *network = ASSERT_PTR(data);
+        FirstInFirstOut *fifo;
+        uint64_t u;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = qdisc_new_static(QDISC_KIND_BFIFO, 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;
+        }
+
+        fifo = BFIFO(qdisc);
+
+        if (isempty(rvalue)) {
+                fifo->limit = 0;
+
+                TAKE_PTR(qdisc);
+                return 0;
+        }
+
+        r = parse_size(rvalue, 1024, &u);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse '%s=', ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+        if (u > UINT32_MAX) {
+                log_syntax(unit, LOG_WARNING, filename, line, 0, "Invalid '%s=', ignoring assignment: %s",
+                           lvalue, rvalue);
+                return 0;
+        }
+
+        fifo->limit = (uint32_t) u;
+
+        TAKE_PTR(qdisc);
+        return 0;
+}
+
+const QDiscVTable pfifo_vtable = {
+        .object_size = sizeof(FirstInFirstOut),
+        .tca_kind = "pfifo",
+        .fill_message = fifo_fill_message,
+};
+
+const QDiscVTable bfifo_vtable = {
+       .object_size = sizeof(FirstInFirstOut),
+       .tca_kind = "bfifo",
+       .fill_message = fifo_fill_message,
+};
+
+const QDiscVTable pfifo_head_drop_vtable = {
+       .object_size = sizeof(FirstInFirstOut),
+       .tca_kind = "pfifo_head_drop",
+       .fill_message = fifo_fill_message,
+};
+
+const QDiscVTable pfifo_fast_vtable = {
+       .object_size = sizeof(FirstInFirstOut),
+       .tca_kind = "pfifo_fast",
+};