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<h1>lib/route/sch/tbf.c</h1> </div>
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<div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span>
<a name="l00002"></a>00002 <span class="comment"> * lib/route/sch/tbf.c TBF Qdisc</span>
<a name="l00003"></a>00003 <span class="comment"> *</span>
<a name="l00004"></a>00004 <span class="comment"> * This library is free software; you can redistribute it and/or</span>
<a name="l00005"></a>00005 <span class="comment"> * modify it under the terms of the GNU Lesser General Public</span>
<a name="l00006"></a>00006 <span class="comment"> * License as published by the Free Software Foundation version 2.1</span>
<a name="l00007"></a>00007 <span class="comment"> * of the License.</span>
<a name="l00008"></a>00008 <span class="comment"> *</span>
<a name="l00009"></a>00009 <span class="comment"> * Copyright (c) 2003-2006 Thomas Graf <tgraf@suug.ch></span>
<a name="l00010"></a>00010 <span class="comment"> */</span>
<a name="l00011"></a>00011 <span class="comment"></span>
<a name="l00012"></a>00012 <span class="comment">/**</span>
<a name="l00013"></a>00013 <span class="comment"> * @ingroup qdisc_api</span>
<a name="l00014"></a>00014 <span class="comment"> * @defgroup tbf Token Bucket Filter (TBF)</span>
<a name="l00015"></a>00015 <span class="comment"> * @{</span>
<a name="l00016"></a>00016 <span class="comment"> */</span>
<a name="l00017"></a>00017
<a name="l00018"></a>00018 <span class="preprocessor">#include <netlink-local.h></span>
<a name="l00019"></a>00019 <span class="preprocessor">#include <netlink-tc.h></span>
<a name="l00020"></a>00020 <span class="preprocessor">#include <netlink/netlink.h></span>
<a name="l00021"></a>00021 <span class="preprocessor">#include <netlink/cache.h></span>
<a name="l00022"></a>00022 <span class="preprocessor">#include <netlink/utils.h></span>
<a name="l00023"></a>00023 <span class="preprocessor">#include <netlink/route/tc.h></span>
<a name="l00024"></a>00024 <span class="preprocessor">#include <netlink/route/qdisc.h></span>
<a name="l00025"></a>00025 <span class="preprocessor">#include <netlink/route/qdisc-modules.h></span>
<a name="l00026"></a>00026 <span class="preprocessor">#include <netlink/route/class.h></span>
<a name="l00027"></a>00027 <span class="preprocessor">#include <netlink/route/class-modules.h></span>
<a name="l00028"></a>00028 <span class="preprocessor">#include <netlink/route/link.h></span>
<a name="l00029"></a>00029 <span class="preprocessor">#include <netlink/route/sch/tbf.h></span>
<a name="l00030"></a>00030 <span class="comment"></span>
<a name="l00031"></a>00031 <span class="comment">/** @cond SKIP */</span>
<a name="l00032"></a>00032 <span class="preprocessor">#define TBF_ATTR_LIMIT 0x01</span>
<a name="l00033"></a>00033 <span class="preprocessor"></span><span class="preprocessor">#define TBF_ATTR_RATE 0x02</span>
<a name="l00034"></a>00034 <span class="preprocessor"></span><span class="preprocessor">#define TBF_ATTR_PEAKRATE 0x10</span>
<a name="l00035"></a>00035 <span class="preprocessor"></span><span class="preprocessor">#define TBF_ATTR_MPU 0x80</span>
<a name="l00036"></a>00036 <span class="preprocessor"></span><span class="comment">/** @endcond */</span>
<a name="l00037"></a>00037
<a name="l00038"></a>00038 <span class="keyword">static</span> <span class="keyword">inline</span> <span class="keyword">struct </span>rtnl_tbf *tbf_qdisc(<span class="keyword">struct</span> rtnl_qdisc *qdisc)
<a name="l00039"></a>00039 {
<a name="l00040"></a>00040 <span class="keywordflow">return</span> (<span class="keyword">struct</span> rtnl_tbf *) qdisc->q_subdata;
<a name="l00041"></a>00041 }
<a name="l00042"></a>00042
<a name="l00043"></a>00043 <span class="keyword">static</span> <span class="keyword">inline</span> <span class="keyword">struct </span>rtnl_tbf *tbf_alloc(<span class="keyword">struct</span> rtnl_qdisc *qdisc)
<a name="l00044"></a>00044 {
<a name="l00045"></a>00045 <span class="keywordflow">if</span> (!qdisc->q_subdata)
<a name="l00046"></a>00046 qdisc->q_subdata = calloc(1, <span class="keyword">sizeof</span>(<span class="keyword">struct</span> rtnl_tbf));
<a name="l00047"></a>00047
<a name="l00048"></a>00048 <span class="keywordflow">return</span> tbf_qdisc(qdisc);
<a name="l00049"></a>00049 }
<a name="l00050"></a>00050
<a name="l00051"></a>00051 <span class="keyword">static</span> <span class="keyword">struct </span><a class="code" href="structnla__policy.html" title="attribute validation policy">nla_policy</a> tbf_policy[TCA_TBF_MAX+1] = {
<a name="l00052"></a>00052 [TCA_TBF_PARMS] = { .<a class="code" href="structnla__policy.html#a70310d3332cb82c390754bd70b1cb7dd" title="Minimal length of payload required to be available.">minlen</a> = <span class="keyword">sizeof</span>(<span class="keyword">struct </span>tc_tbf_qopt) },
<a name="l00053"></a>00053 };
<a name="l00054"></a>00054
<a name="l00055"></a>00055 <span class="keyword">static</span> <span class="keywordtype">int</span> tbf_msg_parser(<span class="keyword">struct</span> rtnl_qdisc *q)
<a name="l00056"></a>00056 {
<a name="l00057"></a>00057 <span class="keywordtype">int</span> err;
<a name="l00058"></a>00058 <span class="keyword">struct </span>nlattr *tb[TCA_TBF_MAX + 1];
<a name="l00059"></a>00059 <span class="keyword">struct </span>rtnl_tbf *tbf;
<a name="l00060"></a>00060
<a name="l00061"></a>00061 err = tca_parse(tb, TCA_TBF_MAX, (<span class="keyword">struct</span> rtnl_tca *) q, tbf_policy);
<a name="l00062"></a>00062 <span class="keywordflow">if</span> (err < 0)
<a name="l00063"></a>00063 <span class="keywordflow">return</span> err;
<a name="l00064"></a>00064
<a name="l00065"></a>00065 tbf = tbf_qdisc(q);
<a name="l00066"></a>00066 <span class="keywordflow">if</span> (!tbf)
<a name="l00067"></a>00067 <span class="keywordflow">return</span> nl_errno(ENOMEM);
<a name="l00068"></a>00068
<a name="l00069"></a>00069 <span class="keywordflow">if</span> (tb[TCA_TBF_PARMS]) {
<a name="l00070"></a>00070 <span class="keyword">struct </span>tc_tbf_qopt opts;
<a name="l00071"></a>00071 <span class="keywordtype">int</span> bufsize;
<a name="l00072"></a>00072
<a name="l00073"></a>00073 <a class="code" href="group__attr.html#gaf2cdaf473a1054b9c3fc735ca7275403" title="Copy a netlink attribute into another memory area.">nla_memcpy</a>(&opts, tb[TCA_TBF_PARMS], <span class="keyword">sizeof</span>(opts));
<a name="l00074"></a>00074 tbf->qt_limit = opts.limit;
<a name="l00075"></a>00075 tbf->qt_mpu = opts.rate.mpu;
<a name="l00076"></a>00076
<a name="l00077"></a>00077 rtnl_copy_ratespec(&tbf->qt_rate, &opts.rate);
<a name="l00078"></a>00078 tbf->qt_rate_txtime = opts.buffer;
<a name="l00079"></a>00079 bufsize = <a class="code" href="group__tc.html#ga460b3c9b69f0bffd46347b1e2d4497e5" title="Calculate buffer size able to transmit in a specific time and rate.">rtnl_tc_calc_bufsize</a>(<a class="code" href="group__utils.html#gade35baf670a48177d9469905159089e7" title="Convert ticks to micro seconds.">nl_ticks2us</a>(opts.buffer),
<a name="l00080"></a>00080 opts.rate.rate);
<a name="l00081"></a>00081 tbf->qt_rate_bucket = bufsize;
<a name="l00082"></a>00082
<a name="l00083"></a>00083 rtnl_copy_ratespec(&tbf->qt_peakrate, &opts.peakrate);
<a name="l00084"></a>00084 tbf->qt_peakrate_txtime = opts.mtu;
<a name="l00085"></a>00085 bufsize = <a class="code" href="group__tc.html#ga460b3c9b69f0bffd46347b1e2d4497e5" title="Calculate buffer size able to transmit in a specific time and rate.">rtnl_tc_calc_bufsize</a>(<a class="code" href="group__utils.html#gade35baf670a48177d9469905159089e7" title="Convert ticks to micro seconds.">nl_ticks2us</a>(opts.mtu),
<a name="l00086"></a>00086 opts.peakrate.rate);
<a name="l00087"></a>00087 tbf->qt_peakrate_bucket = bufsize;
<a name="l00088"></a>00088
<a name="l00089"></a>00089 tbf->qt_mask = (TBF_ATTR_LIMIT | TBF_ATTR_MPU | TBF_ATTR_RATE |
<a name="l00090"></a>00090 TBF_ATTR_PEAKRATE);
<a name="l00091"></a>00091 }
<a name="l00092"></a>00092
<a name="l00093"></a>00093 <span class="keywordflow">return</span> 0;
<a name="l00094"></a>00094 }
<a name="l00095"></a>00095
<a name="l00096"></a>00096 <span class="keyword">static</span> <span class="keywordtype">int</span> tbf_dump_brief(<span class="keyword">struct</span> rtnl_qdisc *qdisc, <span class="keyword">struct</span> <a class="code" href="structnl__dump__params.html" title="Dumping parameters.">nl_dump_params</a> *p,
<a name="l00097"></a>00097 <span class="keywordtype">int</span> line)
<a name="l00098"></a>00098 {
<a name="l00099"></a>00099 <span class="keywordtype">double</span> r, rbit, lim;
<a name="l00100"></a>00100 <span class="keywordtype">char</span> *ru, *rubit, *limu;
<a name="l00101"></a>00101 <span class="keyword">struct </span>rtnl_tbf *tbf = tbf_qdisc(qdisc);
<a name="l00102"></a>00102
<a name="l00103"></a>00103 <span class="keywordflow">if</span> (!tbf)
<a name="l00104"></a>00104 <span class="keywordflow">goto</span> ignore;
<a name="l00105"></a>00105
<a name="l00106"></a>00106 r = <a class="code" href="group__utils.html#ga5a280448ae9e17ff5dc7e822b9f47b11" title="Cancel down a byte counter.">nl_cancel_down_bytes</a>(tbf->qt_rate.rs_rate, &ru);
<a name="l00107"></a>00107 rbit = <a class="code" href="group__utils.html#ga195db70bc2c97b1eb6f40c2d60a6f823" title="Cancel down a bit counter.">nl_cancel_down_bits</a>(tbf->qt_rate.rs_rate*8, &rubit);
<a name="l00108"></a>00108 lim = <a class="code" href="group__utils.html#ga5a280448ae9e17ff5dc7e822b9f47b11" title="Cancel down a byte counter.">nl_cancel_down_bytes</a>(tbf->qt_limit, &limu);
<a name="l00109"></a>00109
<a name="l00110"></a>00110 dp_dump(p, <span class="stringliteral">" rate %.2f%s/s (%.0f%s) limit %.2f%s"</span>,
<a name="l00111"></a>00111 r, ru, rbit, rubit, lim, limu);
<a name="l00112"></a>00112
<a name="l00113"></a>00113 ignore:
<a name="l00114"></a>00114 <span class="keywordflow">return</span> line;
<a name="l00115"></a>00115 }
<a name="l00116"></a>00116
<a name="l00117"></a>00117 <span class="keyword">static</span> <span class="keywordtype">int</span> tbf_dump_full(<span class="keyword">struct</span> rtnl_qdisc *qdisc, <span class="keyword">struct</span> <a class="code" href="structnl__dump__params.html" title="Dumping parameters.">nl_dump_params</a> *p,
<a name="l00118"></a>00118 <span class="keywordtype">int</span> line)
<a name="l00119"></a>00119 {
<a name="l00120"></a>00120 <span class="keyword">struct </span>rtnl_tbf *tbf = tbf_qdisc(qdisc);
<a name="l00121"></a>00121
<a name="l00122"></a>00122 <span class="keywordflow">if</span> (!tbf)
<a name="l00123"></a>00123 <span class="keywordflow">goto</span> ignore;
<a name="l00124"></a>00124
<a name="l00125"></a>00125 <span class="keywordflow">if</span> (1) {
<a name="l00126"></a>00126 <span class="keywordtype">char</span> *bu, *cu;
<a name="l00127"></a>00127 <span class="keywordtype">double</span> bs = <a class="code" href="group__utils.html#ga5a280448ae9e17ff5dc7e822b9f47b11" title="Cancel down a byte counter.">nl_cancel_down_bytes</a>(tbf->qt_rate_bucket, &bu);
<a name="l00128"></a>00128 <span class="keywordtype">double</span> cl = <a class="code" href="group__utils.html#ga5a280448ae9e17ff5dc7e822b9f47b11" title="Cancel down a byte counter.">nl_cancel_down_bytes</a>(1 << tbf->qt_rate.rs_cell_log,
<a name="l00129"></a>00129 &cu);
<a name="l00130"></a>00130
<a name="l00131"></a>00131 dp_dump(p, <span class="stringliteral">"mpu %u rate-bucket-size %1.f%s "</span>
<a name="l00132"></a>00132 <span class="stringliteral">"rate-cell-size %.1f%s\n"</span>,
<a name="l00133"></a>00133 tbf->qt_mpu, bs, bu, cl, cu);
<a name="l00134"></a>00134
<a name="l00135"></a>00135 }
<a name="l00136"></a>00136
<a name="l00137"></a>00137 <span class="keywordflow">if</span> (tbf->qt_mask & TBF_ATTR_PEAKRATE) {
<a name="l00138"></a>00138 <span class="keywordtype">char</span> *pru, *prbu, *bsu, *clu;
<a name="l00139"></a>00139 <span class="keywordtype">double</span> pr, prb, bs, cl;
<a name="l00140"></a>00140
<a name="l00141"></a>00141 pr = <a class="code" href="group__utils.html#ga5a280448ae9e17ff5dc7e822b9f47b11" title="Cancel down a byte counter.">nl_cancel_down_bytes</a>(tbf->qt_peakrate.rs_rate, &pru);
<a name="l00142"></a>00142 prb = <a class="code" href="group__utils.html#ga195db70bc2c97b1eb6f40c2d60a6f823" title="Cancel down a bit counter.">nl_cancel_down_bits</a>(tbf->qt_peakrate.rs_rate * 8, &prbu);
<a name="l00143"></a>00143 bs = <a class="code" href="group__utils.html#ga195db70bc2c97b1eb6f40c2d60a6f823" title="Cancel down a bit counter.">nl_cancel_down_bits</a>(tbf->qt_peakrate_bucket, &bsu);
<a name="l00144"></a>00144 cl = <a class="code" href="group__utils.html#ga195db70bc2c97b1eb6f40c2d60a6f823" title="Cancel down a bit counter.">nl_cancel_down_bits</a>(1 << tbf->qt_peakrate.rs_cell_log,
<a name="l00145"></a>00145 &clu);
<a name="l00146"></a>00146
<a name="l00147"></a>00147 dp_dump_line(p, line++, <span class="stringliteral">" peak-rate %.2f%s/s (%.0f%s) "</span>
<a name="l00148"></a>00148 <span class="stringliteral">"bucket-size %.1f%s cell-size %.1f%s"</span>,
<a name="l00149"></a>00149 <span class="stringliteral">"latency %.1f%s"</span>,
<a name="l00150"></a>00150 pr, pru, prb, prbu, bs, bsu, cl, clu);
<a name="l00151"></a>00151 }
<a name="l00152"></a>00152
<a name="l00153"></a>00153 ignore:
<a name="l00154"></a>00154 <span class="keywordflow">return</span> line;
<a name="l00155"></a>00155 }
<a name="l00156"></a>00156
<a name="l00157"></a>00157 <span class="keyword">static</span> <span class="keyword">struct </span>nl_msg *tbf_get_opts(<span class="keyword">struct</span> rtnl_qdisc *qdisc)
<a name="l00158"></a>00158 {
<a name="l00159"></a>00159 <span class="keyword">struct </span>tc_tbf_qopt opts;
<a name="l00160"></a>00160 <span class="keyword">struct </span>rtnl_tbf *tbf;
<a name="l00161"></a>00161 <span class="keyword">struct </span>nl_msg *msg;
<a name="l00162"></a>00162 uint32_t rtab[<a class="code" href="group__tc.html#ga9a0796847debb07d96fe745d9088a6b5" title="Number of entries in a transmission time lookup table.">RTNL_TC_RTABLE_SIZE</a>];
<a name="l00163"></a>00163 uint32_t ptab[<a class="code" href="group__tc.html#ga9a0796847debb07d96fe745d9088a6b5" title="Number of entries in a transmission time lookup table.">RTNL_TC_RTABLE_SIZE</a>];
<a name="l00164"></a>00164 <span class="keywordtype">int</span> required = TBF_ATTR_RATE | TBF_ATTR_LIMIT;
<a name="l00165"></a>00165
<a name="l00166"></a>00166 memset(&opts, 0, <span class="keyword">sizeof</span>(opts));
<a name="l00167"></a>00167
<a name="l00168"></a>00168 tbf = tbf_qdisc(qdisc);
<a name="l00169"></a>00169 <span class="keywordflow">if</span> (!tbf)
<a name="l00170"></a>00170 <span class="keywordflow">return</span> NULL;
<a name="l00171"></a>00171
<a name="l00172"></a>00172 <span class="keywordflow">if</span> (!(tbf->qt_mask & required) != required)
<a name="l00173"></a>00173 <span class="keywordflow">return</span> NULL;
<a name="l00174"></a>00174
<a name="l00175"></a>00175 opts.limit = tbf->qt_limit;
<a name="l00176"></a>00176 opts.buffer = tbf->qt_rate_txtime;
<a name="l00177"></a>00177 tbf->qt_rate.rs_mpu = tbf->qt_mpu;
<a name="l00178"></a>00178 rtnl_rcopy_ratespec(&opts.rate, &tbf->qt_rate);
<a name="l00179"></a>00179
<a name="l00180"></a>00180 <a class="code" href="group__tc.html#gaf0985ec685f9def7fcaba8cb831c4f2c" title="Compute a transmission time lookup table.">rtnl_tc_build_rate_table</a>(rtab, tbf->qt_mpu & 0xff, tbf->qt_mpu >> 8,
<a name="l00181"></a>00181 1 << tbf->qt_rate.rs_cell_log,
<a name="l00182"></a>00182 tbf->qt_rate.rs_rate);
<a name="l00183"></a>00183
<a name="l00184"></a>00184 <span class="keywordflow">if</span> (tbf->qt_mask & TBF_ATTR_PEAKRATE) {
<a name="l00185"></a>00185 opts.mtu = tbf->qt_peakrate_txtime;
<a name="l00186"></a>00186 tbf->qt_peakrate.rs_mpu = tbf->qt_mpu;
<a name="l00187"></a>00187 rtnl_rcopy_ratespec(&opts.peakrate, &tbf->qt_peakrate);
<a name="l00188"></a>00188
<a name="l00189"></a>00189 <a class="code" href="group__tc.html#gaf0985ec685f9def7fcaba8cb831c4f2c" title="Compute a transmission time lookup table.">rtnl_tc_build_rate_table</a>(ptab, tbf->qt_mpu & 0xff,
<a name="l00190"></a>00190 tbf->qt_mpu >> 8,
<a name="l00191"></a>00191 1 << tbf->qt_peakrate.rs_cell_log,
<a name="l00192"></a>00192 tbf->qt_peakrate.rs_rate);
<a name="l00193"></a>00193 }
<a name="l00194"></a>00194
<a name="l00195"></a>00195 msg = <a class="code" href="group__msg.html#ga89c936bdf5e73455bb1640a0eb8a020d" title="Allocate a new netlink message with the default maximum payload size.">nlmsg_alloc</a>();
<a name="l00196"></a>00196 <span class="keywordflow">if</span> (!msg)
<a name="l00197"></a>00197 <span class="keywordflow">goto</span> nla_put_failure;
<a name="l00198"></a>00198
<a name="l00199"></a>00199 <a class="code" href="group__attr.html#gab63953375be738011e7c9d2c6de74a45" title="Add a netlink attribute to a netlink message.">NLA_PUT</a>(msg, TCA_TBF_PARMS, <span class="keyword">sizeof</span>(opts), &opts);
<a name="l00200"></a>00200 <a class="code" href="group__attr.html#gab63953375be738011e7c9d2c6de74a45" title="Add a netlink attribute to a netlink message.">NLA_PUT</a>(msg, TCA_TBF_RTAB, <span class="keyword">sizeof</span>(rtab), rtab);
<a name="l00201"></a>00201
<a name="l00202"></a>00202 <span class="keywordflow">if</span> (tbf->qt_mask & TBF_ATTR_PEAKRATE)
<a name="l00203"></a>00203 <a class="code" href="group__attr.html#gab63953375be738011e7c9d2c6de74a45" title="Add a netlink attribute to a netlink message.">NLA_PUT</a>(msg, TCA_TBF_PTAB, <span class="keyword">sizeof</span>(ptab), ptab);
<a name="l00204"></a>00204
<a name="l00205"></a>00205 <span class="keywordflow">return</span> msg;
<a name="l00206"></a>00206
<a name="l00207"></a>00207 nla_put_failure:
<a name="l00208"></a>00208 <a class="code" href="group__msg.html#ga138ba9bee70553f9fbe7143deacad48c" title="Free a netlink message.">nlmsg_free</a>(msg);
<a name="l00209"></a>00209 <span class="keywordflow">return</span> NULL;
<a name="l00210"></a>00210 }
<a name="l00211"></a>00211 <span class="comment"></span>
<a name="l00212"></a>00212 <span class="comment">/**</span>
<a name="l00213"></a>00213 <span class="comment"> * @name Attribute Access</span>
<a name="l00214"></a>00214 <span class="comment"> * @{</span>
<a name="l00215"></a>00215 <span class="comment"> */</span>
<a name="l00216"></a>00216 <span class="comment"></span>
<a name="l00217"></a>00217 <span class="comment">/**</span>
<a name="l00218"></a>00218 <span class="comment"> * Set limit of TBF qdisc.</span>
<a name="l00219"></a>00219 <span class="comment"> * @arg qdisc TBF qdisc to be modified.</span>
<a name="l00220"></a>00220 <span class="comment"> * @arg limit New limit in bytes.</span>
<a name="l00221"></a>00221 <span class="comment"> * @return 0 on success or a negative error code.</span>
<a name="l00222"></a>00222 <span class="comment"> */</span>
<a name="l00223"></a><a class="code" href="group__tbf.html#ga243dc3934c3dc4a4c84b7f94fb693904">00223</a> <span class="keywordtype">int</span> <a class="code" href="group__tbf.html#ga243dc3934c3dc4a4c84b7f94fb693904" title="Set limit of TBF qdisc.">rtnl_qdisc_tbf_set_limit</a>(<span class="keyword">struct</span> rtnl_qdisc *qdisc, <span class="keywordtype">int</span> limit)
<a name="l00224"></a>00224 {
<a name="l00225"></a>00225 <span class="keyword">struct </span>rtnl_tbf *tbf;
<a name="l00226"></a>00226
<a name="l00227"></a>00227 tbf = tbf_alloc(qdisc);
<a name="l00228"></a>00228 <span class="keywordflow">if</span> (!tbf)
<a name="l00229"></a>00229 <span class="keywordflow">return</span> nl_errno(ENOMEM);
<a name="l00230"></a>00230
<a name="l00231"></a>00231 tbf->qt_limit = limit;
<a name="l00232"></a>00232 tbf->qt_mask |= TBF_ATTR_LIMIT;
<a name="l00233"></a>00233
<a name="l00234"></a>00234 <span class="keywordflow">return</span> 0;
<a name="l00235"></a>00235 }
<a name="l00236"></a>00236
<a name="l00237"></a>00237 <span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">double</span> calc_limit(<span class="keyword">struct</span> rtnl_ratespec *spec, <span class="keywordtype">int</span> latency,
<a name="l00238"></a>00238 <span class="keywordtype">int</span> bucket)
<a name="l00239"></a>00239 {
<a name="l00240"></a>00240 <span class="keywordtype">double</span> limit;
<a name="l00241"></a>00241
<a name="l00242"></a>00242 limit = (double) spec->rs_rate * ((<span class="keywordtype">double</span>) latency / 1000000.);
<a name="l00243"></a>00243 limit += bucket;
<a name="l00244"></a>00244
<a name="l00245"></a>00245 <span class="keywordflow">return</span> limit;
<a name="l00246"></a>00246 }
<a name="l00247"></a>00247 <span class="comment"></span>
<a name="l00248"></a>00248 <span class="comment">/**</span>
<a name="l00249"></a>00249 <span class="comment"> * Set limit of TBF qdisc by latency.</span>
<a name="l00250"></a>00250 <span class="comment"> * @arg qdisc TBF qdisc to be modified.</span>
<a name="l00251"></a>00251 <span class="comment"> * @arg latency Latency in micro seconds.</span>
<a name="l00252"></a>00252 <span class="comment"> *</span>
<a name="l00253"></a>00253 <span class="comment"> * Calculates and sets the limit based on the desired latency and the</span>
<a name="l00254"></a>00254 <span class="comment"> * configured rate and peak rate. In order for this operation to succeed,</span>
<a name="l00255"></a>00255 <span class="comment"> * the rate and if required the peak rate must have been set in advance.</span>
<a name="l00256"></a>00256 <span class="comment"> *</span>
<a name="l00257"></a>00257 <span class="comment"> * @f[</span>
<a name="l00258"></a>00258 <span class="comment"> * limit_n = \frac{{rate_n} \times {latency}}{10^6}+{bucketsize}_n</span>
<a name="l00259"></a>00259 <span class="comment"> * @f]</span>
<a name="l00260"></a>00260 <span class="comment"> * @f[</span>
<a name="l00261"></a>00261 <span class="comment"> * limit = min(limit_{rate},limit_{peak})</span>
<a name="l00262"></a>00262 <span class="comment"> * @f]</span>
<a name="l00263"></a>00263 <span class="comment"> * </span>
<a name="l00264"></a>00264 <span class="comment"> * @return 0 on success or a negative error code.</span>
<a name="l00265"></a>00265 <span class="comment"> */</span>
<a name="l00266"></a><a class="code" href="group__tbf.html#ga2d6061d91f115af1795d1e2ed622b39e">00266</a> <span class="keywordtype">int</span> <a class="code" href="group__tbf.html#ga2d6061d91f115af1795d1e2ed622b39e" title="Set limit of TBF qdisc by latency.">rtnl_qdisc_tbf_set_limit_by_latency</a>(<span class="keyword">struct</span> rtnl_qdisc *qdisc, <span class="keywordtype">int</span> latency)
<a name="l00267"></a>00267 {
<a name="l00268"></a>00268 <span class="keyword">struct </span>rtnl_tbf *tbf;
<a name="l00269"></a>00269 <span class="keywordtype">double</span> limit, limit2;
<a name="l00270"></a>00270
<a name="l00271"></a>00271 tbf = tbf_alloc(qdisc);
<a name="l00272"></a>00272 <span class="keywordflow">if</span> (!tbf)
<a name="l00273"></a>00273 <span class="keywordflow">return</span> nl_errno(ENOMEM);
<a name="l00274"></a>00274
<a name="l00275"></a>00275 <span class="keywordflow">if</span> (!(tbf->qt_mask & TBF_ATTR_RATE))
<a name="l00276"></a>00276 <span class="keywordflow">return</span> nl_error(EINVAL, <span class="stringliteral">"The rate must be specified before "</span>
<a name="l00277"></a>00277 <span class="stringliteral">"limit can be calculated based on latency."</span>);
<a name="l00278"></a>00278
<a name="l00279"></a>00279 limit = calc_limit(&tbf->qt_rate, latency, tbf->qt_rate_bucket);
<a name="l00280"></a>00280
<a name="l00281"></a>00281 <span class="keywordflow">if</span> (tbf->qt_mask & TBF_ATTR_PEAKRATE) {
<a name="l00282"></a>00282 limit2 = calc_limit(&tbf->qt_peakrate, latency,
<a name="l00283"></a>00283 tbf->qt_peakrate_bucket);
<a name="l00284"></a>00284
<a name="l00285"></a>00285 <span class="keywordflow">if</span> (limit2 < limit)
<a name="l00286"></a>00286 limit = limit2;
<a name="l00287"></a>00287 }
<a name="l00288"></a>00288
<a name="l00289"></a>00289 <span class="keywordflow">return</span> <a class="code" href="group__tbf.html#ga243dc3934c3dc4a4c84b7f94fb693904" title="Set limit of TBF qdisc.">rtnl_qdisc_tbf_set_limit</a>(qdisc, (<span class="keywordtype">int</span>) limit);
<a name="l00290"></a>00290 }
<a name="l00291"></a>00291 <span class="comment"></span>
<a name="l00292"></a>00292 <span class="comment">/**</span>
<a name="l00293"></a>00293 <span class="comment"> * Get limit of TBF qdisc.</span>
<a name="l00294"></a>00294 <span class="comment"> * @arg qdisc TBF qdisc.</span>
<a name="l00295"></a>00295 <span class="comment"> * @return Limit in bytes or a negative error code.</span>
<a name="l00296"></a>00296 <span class="comment"> */</span>
<a name="l00297"></a><a class="code" href="group__tbf.html#ga7a02b4afdfa05738fbe7de7ff8dce7d8">00297</a> <span class="keywordtype">int</span> <a class="code" href="group__tbf.html#ga7a02b4afdfa05738fbe7de7ff8dce7d8" title="Get limit of TBF qdisc.">rtnl_qdisc_tbf_get_limit</a>(<span class="keyword">struct</span> rtnl_qdisc *qdisc)
<a name="l00298"></a>00298 {
<a name="l00299"></a>00299 <span class="keyword">struct </span>rtnl_tbf *tbf;
<a name="l00300"></a>00300
<a name="l00301"></a>00301 tbf = tbf_qdisc(qdisc);
<a name="l00302"></a>00302 <span class="keywordflow">if</span> (tbf && (tbf->qt_mask & TBF_ATTR_LIMIT))
<a name="l00303"></a>00303 <span class="keywordflow">return</span> tbf->qt_limit;
<a name="l00304"></a>00304 <span class="keywordflow">return</span>
<a name="l00305"></a>00305 nl_errno(ENOENT);
<a name="l00306"></a>00306 }
<a name="l00307"></a>00307 <span class="comment"></span>
<a name="l00308"></a>00308 <span class="comment">/**</span>
<a name="l00309"></a>00309 <span class="comment"> * Set MPU of TBF qdisc.</span>
<a name="l00310"></a>00310 <span class="comment"> * @arg qdisc TBF qdisc to be modified.</span>
<a name="l00311"></a>00311 <span class="comment"> * @arg mpu New MPU in bytes.</span>
<a name="l00312"></a>00312 <span class="comment"> * @return 0 on success or a negative error code.</span>
<a name="l00313"></a>00313 <span class="comment"> */</span>
<a name="l00314"></a><a class="code" href="group__tbf.html#ga32e98feb7ac38ee4f6df817c48c6bd3a">00314</a> <span class="keywordtype">int</span> <a class="code" href="group__tbf.html#ga32e98feb7ac38ee4f6df817c48c6bd3a" title="Set MPU of TBF qdisc.">rtnl_qdisc_tbf_set_mpu</a>(<span class="keyword">struct</span> rtnl_qdisc *qdisc, <span class="keywordtype">int</span> mpu)
<a name="l00315"></a>00315 {
<a name="l00316"></a>00316 <span class="keyword">struct </span>rtnl_tbf *tbf;
<a name="l00317"></a>00317
<a name="l00318"></a>00318 tbf = tbf_alloc(qdisc);
<a name="l00319"></a>00319 <span class="keywordflow">if</span> (!tbf)
<a name="l00320"></a>00320 <span class="keywordflow">return</span> nl_errno(ENOMEM);
<a name="l00321"></a>00321
<a name="l00322"></a>00322 tbf->qt_mpu = mpu;
<a name="l00323"></a>00323 tbf->qt_mask |= TBF_ATTR_MPU;
<a name="l00324"></a>00324
<a name="l00325"></a>00325 <span class="keywordflow">return</span> 0;
<a name="l00326"></a>00326 }
<a name="l00327"></a>00327 <span class="comment"></span>
<a name="l00328"></a>00328 <span class="comment">/**</span>
<a name="l00329"></a>00329 <span class="comment"> * Get MPU of TBF qdisc.</span>
<a name="l00330"></a>00330 <span class="comment"> * @arg qdisc TBF qdisc.</span>
<a name="l00331"></a>00331 <span class="comment"> * @return MPU in bytes or a negative error code.</span>
<a name="l00332"></a>00332 <span class="comment"> */</span>
<a name="l00333"></a><a class="code" href="group__tbf.html#ga88170007a17c9125931f9b754be4a420">00333</a> <span class="keywordtype">int</span> <a class="code" href="group__tbf.html#ga88170007a17c9125931f9b754be4a420" title="Get MPU of TBF qdisc.">rtnl_qdisc_tbf_get_mpu</a>(<span class="keyword">struct</span> rtnl_qdisc *qdisc)
<a name="l00334"></a>00334 {
<a name="l00335"></a>00335 <span class="keyword">struct </span>rtnl_tbf *tbf;
<a name="l00336"></a>00336
<a name="l00337"></a>00337 tbf = tbf_qdisc(qdisc);
<a name="l00338"></a>00338 <span class="keywordflow">if</span> (tbf && (tbf->qt_mask & TBF_ATTR_MPU))
<a name="l00339"></a>00339 <span class="keywordflow">return</span> tbf->qt_mpu;
<a name="l00340"></a>00340 <span class="keywordflow">return</span>
<a name="l00341"></a>00341 nl_errno(ENOENT);
<a name="l00342"></a>00342 }
<a name="l00343"></a>00343
<a name="l00344"></a>00344 <span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">int</span> calc_cell_log(<span class="keywordtype">int</span> cell, <span class="keywordtype">int</span> bucket)
<a name="l00345"></a>00345 {
<a name="l00346"></a>00346 <span class="keywordflow">if</span> (cell > 0)
<a name="l00347"></a>00347 cell = <a class="code" href="group__tc.html#ga149f2e05e2ab75842c99166cae7b3630" title="Calculate the binary logarithm for a specific cell size.">rtnl_tc_calc_cell_log</a>(cell);
<a name="l00348"></a>00348 <span class="keywordflow">else</span> {
<a name="l00349"></a>00349 cell = 0;
<a name="l00350"></a>00350
<a name="l00351"></a>00351 <span class="keywordflow">if</span> (!bucket)
<a name="l00352"></a>00352 bucket = 2047; <span class="comment">/* defaults to cell_log=3 */</span>
<a name="l00353"></a>00353
<a name="l00354"></a>00354 <span class="keywordflow">while</span> ((bucket >> cell) > 255)
<a name="l00355"></a>00355 cell++;
<a name="l00356"></a>00356 }
<a name="l00357"></a>00357
<a name="l00358"></a>00358 <span class="keywordflow">return</span> cell;
<a name="l00359"></a>00359 }
<a name="l00360"></a>00360 <span class="comment"></span>
<a name="l00361"></a>00361 <span class="comment">/**</span>
<a name="l00362"></a>00362 <span class="comment"> * Set rate of TBF qdisc.</span>
<a name="l00363"></a>00363 <span class="comment"> * @arg qdisc TBF qdisc to be modified.</span>
<a name="l00364"></a>00364 <span class="comment"> * @arg rate New rate in bytes per second.</span>
<a name="l00365"></a>00365 <span class="comment"> * @arg bucket Size of bucket in bytes.</span>
<a name="l00366"></a>00366 <span class="comment"> * @arg cell Size of a rate cell or 0 to get default value.</span>
<a name="l00367"></a>00367 <span class="comment"> * @return 0 on success or a negative error code.</span>
<a name="l00368"></a>00368 <span class="comment"> */</span>
<a name="l00369"></a><a class="code" href="group__tbf.html#ga0429fd89cd8dd65d8b516cb57b33bc3d">00369</a> <span class="keywordtype">int</span> <a class="code" href="group__tbf.html#ga0429fd89cd8dd65d8b516cb57b33bc3d" title="Set rate of TBF qdisc.">rtnl_qdisc_tbf_set_rate</a>(<span class="keyword">struct</span> rtnl_qdisc *qdisc, <span class="keywordtype">int</span> rate, <span class="keywordtype">int</span> bucket,
<a name="l00370"></a>00370 <span class="keywordtype">int</span> cell)
<a name="l00371"></a>00371 {
<a name="l00372"></a>00372 <span class="keyword">struct </span>rtnl_tbf *tbf;
<a name="l00373"></a>00373 <span class="keywordtype">int</span> cell_log;
<a name="l00374"></a>00374
<a name="l00375"></a>00375 tbf = tbf_alloc(qdisc);
<a name="l00376"></a>00376 <span class="keywordflow">if</span> (!tbf)
<a name="l00377"></a>00377 <span class="keywordflow">return</span> nl_errno(ENOMEM);
<a name="l00378"></a>00378
<a name="l00379"></a>00379 cell_log = calc_cell_log(cell, bucket);
<a name="l00380"></a>00380 <span class="keywordflow">if</span> (cell_log < 0)
<a name="l00381"></a>00381 <span class="keywordflow">return</span> cell_log;
<a name="l00382"></a>00382
<a name="l00383"></a>00383 tbf->qt_rate.rs_rate = rate;
<a name="l00384"></a>00384 tbf->qt_rate_bucket = bucket;
<a name="l00385"></a>00385 tbf->qt_rate.rs_cell_log = cell_log;
<a name="l00386"></a>00386 tbf->qt_rate_txtime = <a class="code" href="group__tc.html#gaf3dc48257284437d340d8493b33b9b98" title="Calculate time required to transmit buffer at a specific rate.">rtnl_tc_calc_txtime</a>(bucket, rate);
<a name="l00387"></a>00387 tbf->qt_mask |= TBF_ATTR_RATE;
<a name="l00388"></a>00388
<a name="l00389"></a>00389 <span class="keywordflow">return</span> 0;
<a name="l00390"></a>00390 }
<a name="l00391"></a>00391 <span class="comment"></span>
<a name="l00392"></a>00392 <span class="comment">/**</span>
<a name="l00393"></a>00393 <span class="comment"> * Get rate of TBF qdisc.</span>
<a name="l00394"></a>00394 <span class="comment"> * @arg qdisc TBF qdisc.</span>
<a name="l00395"></a>00395 <span class="comment"> * @return Rate in bytes per seconds or a negative error code.</span>
<a name="l00396"></a>00396 <span class="comment"> */</span>
<a name="l00397"></a><a class="code" href="group__tbf.html#ga33052452bb747b837eb04c8a9243354b">00397</a> <span class="keywordtype">int</span> <a class="code" href="group__tbf.html#ga33052452bb747b837eb04c8a9243354b" title="Get rate of TBF qdisc.">rtnl_qdisc_tbf_get_rate</a>(<span class="keyword">struct</span> rtnl_qdisc *qdisc)
<a name="l00398"></a>00398 {
<a name="l00399"></a>00399 <span class="keyword">struct </span>rtnl_tbf *tbf;
<a name="l00400"></a>00400
<a name="l00401"></a>00401 tbf = tbf_qdisc(qdisc);
<a name="l00402"></a>00402 <span class="keywordflow">if</span> (tbf && (tbf->qt_mask & TBF_ATTR_RATE))
<a name="l00403"></a>00403 <span class="keywordflow">return</span> tbf->qt_rate.rs_rate;
<a name="l00404"></a>00404 <span class="keywordflow">else</span>
<a name="l00405"></a>00405 <span class="keywordflow">return</span> -1;
<a name="l00406"></a>00406 }
<a name="l00407"></a>00407 <span class="comment"></span>
<a name="l00408"></a>00408 <span class="comment">/**</span>
<a name="l00409"></a>00409 <span class="comment"> * Get rate bucket size of TBF qdisc.</span>
<a name="l00410"></a>00410 <span class="comment"> * @arg qdisc TBF qdisc.</span>
<a name="l00411"></a>00411 <span class="comment"> * @return Size of rate bucket or a negative error code.</span>
<a name="l00412"></a>00412 <span class="comment"> */</span>
<a name="l00413"></a><a class="code" href="group__tbf.html#ga48af84163e6376406a11371323fbe4be">00413</a> <span class="keywordtype">int</span> <a class="code" href="group__tbf.html#ga48af84163e6376406a11371323fbe4be" title="Get rate bucket size of TBF qdisc.">rtnl_qdisc_tbf_get_rate_bucket</a>(<span class="keyword">struct</span> rtnl_qdisc *qdisc)
<a name="l00414"></a>00414 {
<a name="l00415"></a>00415 <span class="keyword">struct </span>rtnl_tbf *tbf;
<a name="l00416"></a>00416
<a name="l00417"></a>00417 tbf = tbf_qdisc(qdisc);
<a name="l00418"></a>00418 <span class="keywordflow">if</span> (tbf && (tbf->qt_mask & TBF_ATTR_RATE))
<a name="l00419"></a>00419 <span class="keywordflow">return</span> tbf->qt_rate_bucket;
<a name="l00420"></a>00420 <span class="keywordflow">else</span>
<a name="l00421"></a>00421 <span class="keywordflow">return</span> -1;
<a name="l00422"></a>00422 }
<a name="l00423"></a>00423 <span class="comment"></span>
<a name="l00424"></a>00424 <span class="comment">/**</span>
<a name="l00425"></a>00425 <span class="comment"> * Get rate cell size of TBF qdisc.</span>
<a name="l00426"></a>00426 <span class="comment"> * @arg qdisc TBF qdisc.</span>
<a name="l00427"></a>00427 <span class="comment"> * @return Size of rate cell in bytes or a negative error code.</span>
<a name="l00428"></a>00428 <span class="comment"> */</span>
<a name="l00429"></a><a class="code" href="group__tbf.html#ga3c2e09002bf4bac13fb3b31e3153195e">00429</a> <span class="keywordtype">int</span> <a class="code" href="group__tbf.html#ga3c2e09002bf4bac13fb3b31e3153195e" title="Get rate cell size of TBF qdisc.">rtnl_qdisc_tbf_get_rate_cell</a>(<span class="keyword">struct</span> rtnl_qdisc *qdisc)
<a name="l00430"></a>00430 {
<a name="l00431"></a>00431 <span class="keyword">struct </span>rtnl_tbf *tbf;
<a name="l00432"></a>00432
<a name="l00433"></a>00433 tbf = tbf_qdisc(qdisc);
<a name="l00434"></a>00434 <span class="keywordflow">if</span> (tbf && (tbf->qt_mask & TBF_ATTR_RATE))
<a name="l00435"></a>00435 <span class="keywordflow">return</span> (1 << tbf->qt_rate.rs_cell_log);
<a name="l00436"></a>00436 <span class="keywordflow">else</span>
<a name="l00437"></a>00437 <span class="keywordflow">return</span> -1;
<a name="l00438"></a>00438 }
<a name="l00439"></a>00439 <span class="comment"></span>
<a name="l00440"></a>00440 <span class="comment">/**</span>
<a name="l00441"></a>00441 <span class="comment"> * Set peak rate of TBF qdisc.</span>
<a name="l00442"></a>00442 <span class="comment"> * @arg qdisc TBF qdisc to be modified.</span>
<a name="l00443"></a>00443 <span class="comment"> * @arg rate New peak rate in bytes per second.</span>
<a name="l00444"></a>00444 <span class="comment"> * @arg bucket Size of peakrate bucket.</span>
<a name="l00445"></a>00445 <span class="comment"> * @arg cell Size of a peakrate cell or 0 to get default value.</span>
<a name="l00446"></a>00446 <span class="comment"> * @return 0 on success or a negative error code.</span>
<a name="l00447"></a>00447 <span class="comment"> */</span>
<a name="l00448"></a><a class="code" href="group__tbf.html#ga90dbd91cf2a3a7b0c41e245807bf81cb">00448</a> <span class="keywordtype">int</span> <a class="code" href="group__tbf.html#ga90dbd91cf2a3a7b0c41e245807bf81cb" title="Set peak rate of TBF qdisc.">rtnl_qdisc_tbf_set_peakrate</a>(<span class="keyword">struct</span> rtnl_qdisc *qdisc, <span class="keywordtype">int</span> rate, <span class="keywordtype">int</span> bucket,
<a name="l00449"></a>00449 <span class="keywordtype">int</span> cell)
<a name="l00450"></a>00450 {
<a name="l00451"></a>00451 <span class="keyword">struct </span>rtnl_tbf *tbf;
<a name="l00452"></a>00452 <span class="keywordtype">int</span> cell_log;
<a name="l00453"></a>00453
<a name="l00454"></a>00454 tbf = tbf_alloc(qdisc);
<a name="l00455"></a>00455 <span class="keywordflow">if</span> (!tbf)
<a name="l00456"></a>00456 <span class="keywordflow">return</span> nl_errno(ENOMEM);
<a name="l00457"></a>00457
<a name="l00458"></a>00458 cell_log = calc_cell_log(cell, bucket);
<a name="l00459"></a>00459 <span class="keywordflow">if</span> (cell_log < 0)
<a name="l00460"></a>00460 <span class="keywordflow">return</span> cell_log;
<a name="l00461"></a>00461
<a name="l00462"></a>00462 tbf->qt_peakrate.rs_rate = rate;
<a name="l00463"></a>00463 tbf->qt_peakrate_bucket = bucket;
<a name="l00464"></a>00464 tbf->qt_peakrate.rs_cell_log = cell_log;
<a name="l00465"></a>00465 tbf->qt_peakrate_txtime = <a class="code" href="group__tc.html#gaf3dc48257284437d340d8493b33b9b98" title="Calculate time required to transmit buffer at a specific rate.">rtnl_tc_calc_txtime</a>(bucket, rate);
<a name="l00466"></a>00466
<a name="l00467"></a>00467 tbf->qt_mask |= TBF_ATTR_PEAKRATE;
<a name="l00468"></a>00468
<a name="l00469"></a>00469 <span class="keywordflow">return</span> 0;
<a name="l00470"></a>00470 }
<a name="l00471"></a>00471 <span class="comment"></span>
<a name="l00472"></a>00472 <span class="comment">/**</span>
<a name="l00473"></a>00473 <span class="comment"> * Get peak rate of TBF qdisc.</span>
<a name="l00474"></a>00474 <span class="comment"> * @arg qdisc TBF qdisc.</span>
<a name="l00475"></a>00475 <span class="comment"> * @return Peak rate in bytes per seconds or a negative error code.</span>
<a name="l00476"></a>00476 <span class="comment"> */</span>
<a name="l00477"></a><a class="code" href="group__tbf.html#gace885146d439a73f922c175d49bce526">00477</a> <span class="keywordtype">int</span> <a class="code" href="group__tbf.html#gace885146d439a73f922c175d49bce526" title="Get peak rate of TBF qdisc.">rtnl_qdisc_tbf_get_peakrate</a>(<span class="keyword">struct</span> rtnl_qdisc *qdisc)
<a name="l00478"></a>00478 {
<a name="l00479"></a>00479 <span class="keyword">struct </span>rtnl_tbf *tbf;
<a name="l00480"></a>00480
<a name="l00481"></a>00481 tbf = tbf_qdisc(qdisc);
<a name="l00482"></a>00482 <span class="keywordflow">if</span> (tbf && (tbf->qt_mask & TBF_ATTR_PEAKRATE))
<a name="l00483"></a>00483 <span class="keywordflow">return</span> tbf->qt_peakrate.rs_rate;
<a name="l00484"></a>00484 <span class="keywordflow">else</span>
<a name="l00485"></a>00485 <span class="keywordflow">return</span> -1;
<a name="l00486"></a>00486 }
<a name="l00487"></a>00487 <span class="comment"></span>
<a name="l00488"></a>00488 <span class="comment">/**</span>
<a name="l00489"></a>00489 <span class="comment"> * Get peak rate bucket size of TBF qdisc.</span>
<a name="l00490"></a>00490 <span class="comment"> * @arg qdisc TBF qdisc.</span>
<a name="l00491"></a>00491 <span class="comment"> * @return Size of peak rate bucket or a negative error code.</span>
<a name="l00492"></a>00492 <span class="comment"> */</span>
<a name="l00493"></a><a class="code" href="group__tbf.html#ga38960a00c8f30a1b3095207391c0879e">00493</a> <span class="keywordtype">int</span> <a class="code" href="group__tbf.html#ga38960a00c8f30a1b3095207391c0879e" title="Get peak rate bucket size of TBF qdisc.">rtnl_qdisc_tbf_get_peakrate_bucket</a>(<span class="keyword">struct</span> rtnl_qdisc *qdisc)
<a name="l00494"></a>00494 {
<a name="l00495"></a>00495 <span class="keyword">struct </span>rtnl_tbf *tbf;
<a name="l00496"></a>00496
<a name="l00497"></a>00497 tbf = tbf_qdisc(qdisc);
<a name="l00498"></a>00498 <span class="keywordflow">if</span> (tbf && (tbf->qt_mask & TBF_ATTR_PEAKRATE))
<a name="l00499"></a>00499 <span class="keywordflow">return</span> tbf->qt_peakrate_bucket;
<a name="l00500"></a>00500 <span class="keywordflow">else</span>
<a name="l00501"></a>00501 <span class="keywordflow">return</span> -1;
<a name="l00502"></a>00502 }
<a name="l00503"></a>00503 <span class="comment"></span>
<a name="l00504"></a>00504 <span class="comment">/**</span>
<a name="l00505"></a>00505 <span class="comment"> * Get peak rate cell size of TBF qdisc.</span>
<a name="l00506"></a>00506 <span class="comment"> * @arg qdisc TBF qdisc.</span>
<a name="l00507"></a>00507 <span class="comment"> * @return Size of peak rate cell in bytes or a negative error code.</span>
<a name="l00508"></a>00508 <span class="comment"> */</span>
<a name="l00509"></a><a class="code" href="group__tbf.html#gaa08bbd6446a6f46b8e792faa58ba743d">00509</a> <span class="keywordtype">int</span> <a class="code" href="group__tbf.html#gaa08bbd6446a6f46b8e792faa58ba743d" title="Get peak rate cell size of TBF qdisc.">rtnl_qdisc_tbf_get_peakrate_cell</a>(<span class="keyword">struct</span> rtnl_qdisc *qdisc)
<a name="l00510"></a>00510 {
<a name="l00511"></a>00511 <span class="keyword">struct </span>rtnl_tbf *tbf;
<a name="l00512"></a>00512
<a name="l00513"></a>00513 tbf = tbf_qdisc(qdisc);
<a name="l00514"></a>00514 <span class="keywordflow">if</span> (tbf && (tbf->qt_mask & TBF_ATTR_PEAKRATE))
<a name="l00515"></a>00515 <span class="keywordflow">return</span> (1 << tbf->qt_peakrate.rs_cell_log);
<a name="l00516"></a>00516 <span class="keywordflow">else</span>
<a name="l00517"></a>00517 <span class="keywordflow">return</span> -1;
<a name="l00518"></a>00518 }
<a name="l00519"></a>00519 <span class="comment"></span>
<a name="l00520"></a>00520 <span class="comment">/** @} */</span>
<a name="l00521"></a>00521
<a name="l00522"></a>00522 <span class="keyword">static</span> <span class="keyword">struct </span><a class="code" href="structrtnl__qdisc__ops.html" title="Qdisc Operations.">rtnl_qdisc_ops</a> tbf_qdisc_ops = {
<a name="l00523"></a>00523 .<a class="code" href="structrtnl__qdisc__ops.html#a5df5424d29acfa9ae66e7f35a9ca2081" title="Kind/Name of Qdisc.">qo_kind</a> = <span class="stringliteral">"tbf"</span>,
<a name="l00524"></a>00524 .qo_msg_parser = tbf_msg_parser,
<a name="l00525"></a>00525 .qo_dump[<a class="code" href="group__utils.html#ggacfb5566c73f0965c5241d7d49bc717e9a5597887c080d5ecae358b6065a4048fd" title="Dump object in a brief one-liner.">NL_DUMP_BRIEF</a>] = tbf_dump_brief,
<a name="l00526"></a>00526 .qo_dump[<a class="code" href="group__utils.html#ggacfb5566c73f0965c5241d7d49bc717e9a1445106c7af529b2c99ee289fbcd3179" title="Dump all attributes but no statistics.">NL_DUMP_FULL</a>] = tbf_dump_full,
<a name="l00527"></a>00527 .qo_get_opts = tbf_get_opts,
<a name="l00528"></a>00528 };
<a name="l00529"></a>00529
<a name="l00530"></a>00530 <span class="keyword">static</span> <span class="keywordtype">void</span> __init tbf_init(<span class="keywordtype">void</span>)
<a name="l00531"></a>00531 {
<a name="l00532"></a>00532 <a class="code" href="group__qdisc__api.html#ga52a96211c54bed89f60bc4b106747133" title="Register a qdisc module.">rtnl_qdisc_register</a>(&tbf_qdisc_ops);
<a name="l00533"></a>00533 }
<a name="l00534"></a>00534
<a name="l00535"></a>00535 <span class="keyword">static</span> <span class="keywordtype">void</span> __exit tbf_exit(<span class="keywordtype">void</span>)
<a name="l00536"></a>00536 {
<a name="l00537"></a>00537 <a class="code" href="group__qdisc__api.html#ga0e1c8c70c536964578dd544fd23f80ff" title="Unregister a qdisc module.">rtnl_qdisc_unregister</a>(&tbf_qdisc_ops);
<a name="l00538"></a>00538 }
<a name="l00539"></a>00539 <span class="comment"></span>
<a name="l00540"></a>00540 <span class="comment">/** @} */</span>
</pre></div></div>
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