This commit was generated by cvs2svn to compensate for changes in r786,

[libnl.git] / lib / route / sch / red.c

diff --git a/lib/route/sch/red.c b/lib/route/sch/red.c
new file mode 100644 (file)
index 0000000..80a44af
--- /dev/null
+++ b/lib/route/sch/red.c
@@ -0,0 +1,219 @@
+/*
+ * lib/route/sch/red.c         RED Qdisc
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation version 2.1
+ *     of the License.
+ *
+ * Copyright (c) 2003-2006 Thomas Graf <tgraf@suug.ch>
+ */
+
+/**
+ * @ingroup qdisc
+ * @defgroup red Random Early Detection (RED)
+ * @brief
+ * @{
+ */
+
+#include <netlink-local.h>
+#include <netlink-tc.h>
+#include <netlink/netlink.h>
+#include <netlink/utils.h>
+#include <netlink/route/qdisc.h>
+#include <netlink/route/qdisc-modules.h>
+#include <netlink/route/sch/red.h>
+
+/** @cond SKIP */
+#define RED_ATTR_LIMIT         0x01
+#define RED_ATTR_QTH_MIN       0x02
+#define RED_ATTR_QTH_MAX       0x04
+#define RED_ATTR_FLAGS         0x08
+#define RED_ATTR_WLOG          0x10
+#define RED_ATTR_PLOG          0x20
+#define RED_ATTR_SCELL_LOG     0x40
+/** @endcond */
+
+static inline struct rtnl_red *red_qdisc(struct rtnl_qdisc *qdisc)
+{
+       return (struct rtnl_red *) qdisc->q_subdata;
+}
+
+static inline struct rtnl_red *red_alloc(struct rtnl_qdisc *qdisc)
+{
+       if (!qdisc->q_subdata)
+               qdisc->q_subdata = calloc(1, sizeof(struct rtnl_red));
+
+       return red_qdisc(qdisc);
+}
+
+static struct nla_policy red_policy[TCA_RED_MAX+1] = {
+       [TCA_RED_PARMS]         = { .minlen = sizeof(struct tc_red_qopt) },
+};
+
+static int red_msg_parser(struct rtnl_qdisc *qdisc)
+{
+       struct nlattr *tb[TCA_RED_MAX+1];
+       struct rtnl_red *red;
+       struct tc_red_qopt *opts;
+       int err;
+
+       if (!(qdisc->q_mask & TCA_ATTR_OPTS))
+               return 0;
+
+       err = tca_parse(tb, TCA_RED_MAX, (struct rtnl_tca *) qdisc, red_policy);
+       if (err < 0)
+               return err;
+
+       if (!tb[TCA_RED_PARMS])
+               return nl_error(EINVAL, "Missing TCA_RED_PARMS");
+
+       red = red_alloc(qdisc);
+       if (!red)
+               return nl_errno(ENOMEM);
+
+       opts = nla_data(tb[TCA_RED_PARMS]);
+
+       red->qr_limit = opts->limit;
+       red->qr_qth_min = opts->qth_min;
+       red->qr_qth_max = opts->qth_max;
+       red->qr_flags = opts->flags;
+       red->qr_wlog = opts->Wlog;
+       red->qr_plog = opts->Plog;
+       red->qr_scell_log = opts->Scell_log;
+
+       red->qr_mask = (RED_ATTR_LIMIT | RED_ATTR_QTH_MIN | RED_ATTR_QTH_MAX |
+                       RED_ATTR_FLAGS | RED_ATTR_WLOG | RED_ATTR_PLOG |
+                       RED_ATTR_SCELL_LOG);
+
+       return 0;
+}
+
+static int red_dump_brief(struct rtnl_qdisc *qdisc, struct nl_dump_params *p,
+                         int line)
+{
+       struct rtnl_red *red = red_qdisc(qdisc);
+
+       if (red) {
+               /* XXX: limit, min, max, flags */
+       }
+
+       return line;
+}
+
+static int red_dump_full(struct rtnl_qdisc *qdisc, struct nl_dump_params *p,
+                        int line)
+{
+       struct rtnl_red *red = red_qdisc(qdisc);
+
+       if (red) {
+               /* XXX: wlog, plog, scell_log */
+       }
+
+       return line;
+}
+
+static int red_dump_stats(struct rtnl_qdisc *qdisc, struct nl_dump_params *p,
+                         int line)
+{
+       struct rtnl_red *red = red_qdisc(qdisc);
+
+       if (red) {
+               /* XXX: xstats */
+       }
+
+       return line;
+}
+
+static struct nl_msg *red_get_opts(struct rtnl_qdisc *qdisc)
+{
+       struct rtnl_red *red;
+       struct nl_msg *msg;
+
+       red = red_qdisc(qdisc);
+       if (!red)
+               return NULL;
+
+       msg = nlmsg_build_no_hdr();
+       if (!msg)
+               goto errout;
+
+#if 0
+       memset(&opts, 0, sizeof(opts));
+       opts.quantum = sfq->qs_quantum;
+       opts.perturb_period = sfq->qs_perturb;
+       opts.limit = sfq->qs_limit;
+
+       if (nlmsg_append(msg, &opts, sizeof(opts), 0) < 0)
+               goto errout;
+#endif
+
+       return msg;
+errout:
+       nlmsg_free(msg);
+       return NULL;
+}
+
+/**
+ * @name Attribute Access
+ * @{
+ */
+
+/**
+ * Set limit of RED qdisc.
+ * @arg qdisc          RED qdisc to be modified.
+ * @arg limit          New limit in number of packets.
+ * @return 0 on success or a negative error code.
+ */
+int rtnl_red_set_limit(struct rtnl_qdisc *qdisc, int limit)
+{
+       struct rtnl_red *red;
+
+       red = red_alloc(qdisc);
+       if (!red)
+               return nl_errno(ENOMEM);
+
+       red->qr_limit = limit;
+       red->qr_mask |= RED_ATTR_LIMIT;
+
+       return 0;
+}
+
+/**
+ * Get limit of RED qdisc.
+ * @arg qdisc          RED qdisc.
+ * @return Limit or a negative error code.
+ */
+int rtnl_red_get_limit(struct rtnl_qdisc *qdisc)
+{
+       struct rtnl_red *red;
+
+       red = red_qdisc(qdisc);
+       if (red && (red->qr_mask & RED_ATTR_LIMIT))
+               return red->qr_limit;
+       else
+               return nl_errno(ENOENT);
+}
+
+/** @} */
+
+static struct rtnl_qdisc_ops red_ops = {
+       .qo_kind                = "red",
+       .qo_msg_parser          = red_msg_parser,
+       .qo_dump[NL_DUMP_BRIEF] = red_dump_brief,
+       .qo_dump[NL_DUMP_FULL]  = red_dump_full,
+       .qo_dump[NL_DUMP_STATS] = red_dump_stats,
+       .qo_get_opts            = red_get_opts,
+};
+
+static void __init red_init(void)
+{
+       rtnl_qdisc_register(&red_ops);
+}
+
+static void __exit red_exit(void)
+{
+       rtnl_qdisc_unregister(&red_ops);
+}
+
+/** @} */