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<h1>lib/route/sch/sfq.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/sfq.c SFQ 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 sfq Stochastic Fairness Queueing (SFQ)</span>
<a name="l00015"></a>00015 <span class="comment"> * @brief</span>
<a name="l00016"></a>00016 <span class="comment"> *</span>
<a name="l00017"></a>00017 <span class="comment"> * @par Parameter Description</span>
<a name="l00018"></a>00018 <span class="comment"> * - \b Quantum: Number of bytes to send out per slot and round.</span>
<a name="l00019"></a>00019 <span class="comment"> * - \b Perturbation: Timer period between changing the hash function.</span>
<a name="l00020"></a>00020 <span class="comment"> * - \b Limit: Upper limit of queue in number of packets before SFQ starts</span>
<a name="l00021"></a>00021 <span class="comment"> * dropping packets.</span>
<a name="l00022"></a>00022 <span class="comment"> * - \b Divisor: Hash table divisor, i.e. size of hash table.</span>
<a name="l00023"></a>00023 <span class="comment"> * @{</span>
<a name="l00024"></a>00024 <span class="comment"> */</span>
<a name="l00025"></a>00025
<a name="l00026"></a>00026 <span class="preprocessor">#include <netlink-local.h></span>
<a name="l00027"></a>00027 <span class="preprocessor">#include <netlink-tc.h></span>
<a name="l00028"></a>00028 <span class="preprocessor">#include <netlink/netlink.h></span>
<a name="l00029"></a>00029 <span class="preprocessor">#include <netlink/utils.h></span>
<a name="l00030"></a>00030 <span class="preprocessor">#include <netlink/route/qdisc.h></span>
<a name="l00031"></a>00031 <span class="preprocessor">#include <netlink/route/qdisc-modules.h></span>
<a name="l00032"></a>00032 <span class="preprocessor">#include <netlink/route/sch/sfq.h></span>
<a name="l00033"></a>00033 <span class="comment"></span>
<a name="l00034"></a>00034 <span class="comment">/** @cond SKIP */</span>
<a name="l00035"></a>00035 <span class="preprocessor">#define SCH_SFQ_ATTR_QUANTUM 0x01</span>
<a name="l00036"></a>00036 <span class="preprocessor"></span><span class="preprocessor">#define SCH_SFQ_ATTR_PERTURB 0x02</span>
<a name="l00037"></a>00037 <span class="preprocessor"></span><span class="preprocessor">#define SCH_SFQ_ATTR_LIMIT 0x04</span>
<a name="l00038"></a>00038 <span class="preprocessor"></span><span class="preprocessor">#define SCH_SFQ_ATTR_DIVISOR 0x08</span>
<a name="l00039"></a>00039 <span class="preprocessor"></span><span class="preprocessor">#define SCH_SFQ_ATTR_FLOWS 0x10</span>
<a name="l00040"></a>00040 <span class="preprocessor"></span><span class="comment">/** @endcond */</span>
<a name="l00041"></a>00041
<a name="l00042"></a>00042 <span class="keyword">static</span> <span class="keyword">inline</span> <span class="keyword">struct </span>rtnl_sfq *sfq_qdisc(<span class="keyword">struct</span> rtnl_qdisc *qdisc)
<a name="l00043"></a>00043 {
<a name="l00044"></a>00044 <span class="keywordflow">return</span> (<span class="keyword">struct</span> rtnl_sfq *) qdisc->q_subdata;
<a name="l00045"></a>00045 }
<a name="l00046"></a>00046
<a name="l00047"></a>00047 <span class="keyword">static</span> <span class="keyword">inline</span> <span class="keyword">struct </span>rtnl_sfq *sfq_alloc(<span class="keyword">struct</span> rtnl_qdisc *qdisc)
<a name="l00048"></a>00048 {
<a name="l00049"></a>00049 <span class="keywordflow">if</span> (!qdisc->q_subdata)
<a name="l00050"></a>00050 qdisc->q_subdata = calloc(1, <span class="keyword">sizeof</span>(<span class="keyword">struct</span> rtnl_sfq));
<a name="l00051"></a>00051
<a name="l00052"></a>00052 <span class="keywordflow">return</span> sfq_qdisc(qdisc);
<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> sfq_msg_parser(<span class="keyword">struct</span> rtnl_qdisc *qdisc)
<a name="l00056"></a>00056 {
<a name="l00057"></a>00057 <span class="keyword">struct </span>rtnl_sfq *sfq;
<a name="l00058"></a>00058 <span class="keyword">struct </span>tc_sfq_qopt *opts;
<a name="l00059"></a>00059
<a name="l00060"></a>00060 <span class="keywordflow">if</span> (!(qdisc->ce_mask & TCA_ATTR_OPTS))
<a name="l00061"></a>00061 <span class="keywordflow">return</span> 0;
<a name="l00062"></a>00062
<a name="l00063"></a>00063 <span class="keywordflow">if</span> (qdisc->q_opts->d_size < <span class="keyword">sizeof</span>(*opts))
<a name="l00064"></a>00064 <span class="keywordflow">return</span> nl_error(EINVAL, <span class="stringliteral">"SFQ specific options size mismatch"</span>);
<a name="l00065"></a>00065
<a name="l00066"></a>00066 sfq = sfq_alloc(qdisc);
<a name="l00067"></a>00067 <span class="keywordflow">if</span> (!sfq)
<a name="l00068"></a>00068 <span class="keywordflow">return</span> nl_errno(ENOMEM);
<a name="l00069"></a>00069
<a name="l00070"></a>00070 opts = (<span class="keyword">struct </span>tc_sfq_qopt *) qdisc->q_opts->d_data;
<a name="l00071"></a>00071
<a name="l00072"></a>00072 sfq->qs_quantum = opts->quantum;
<a name="l00073"></a>00073 sfq->qs_perturb = opts->perturb_period;
<a name="l00074"></a>00074 sfq->qs_limit = opts->limit;
<a name="l00075"></a>00075 sfq->qs_divisor = opts->divisor;
<a name="l00076"></a>00076 sfq->qs_flows = opts->flows;
<a name="l00077"></a>00077
<a name="l00078"></a>00078 sfq->qs_mask = (SCH_SFQ_ATTR_QUANTUM | SCH_SFQ_ATTR_PERTURB |
<a name="l00079"></a>00079 SCH_SFQ_ATTR_LIMIT | SCH_SFQ_ATTR_DIVISOR |
<a name="l00080"></a>00080 SCH_SFQ_ATTR_FLOWS);
<a name="l00081"></a>00081
<a name="l00082"></a>00082 <span class="keywordflow">return</span> 0;
<a name="l00083"></a>00083 }
<a name="l00084"></a>00084
<a name="l00085"></a>00085 <span class="keyword">static</span> <span class="keywordtype">void</span> sfq_free_data(<span class="keyword">struct</span> rtnl_qdisc *qdisc)
<a name="l00086"></a>00086 {
<a name="l00087"></a>00087 free(qdisc->q_subdata);
<a name="l00088"></a>00088 }
<a name="l00089"></a>00089
<a name="l00090"></a>00090 <span class="keyword">static</span> <span class="keywordtype">int</span> sfq_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="l00091"></a>00091 <span class="keywordtype">int</span> line)
<a name="l00092"></a>00092 {
<a name="l00093"></a>00093 <span class="keyword">struct </span>rtnl_sfq *sfq = sfq_qdisc(qdisc);
<a name="l00094"></a>00094
<a name="l00095"></a>00095 <span class="keywordflow">if</span> (sfq)
<a name="l00096"></a>00096 dp_dump(p, <span class="stringliteral">" quantum %u perturb %us"</span>,
<a name="l00097"></a>00097 sfq->qs_quantum,
<a name="l00098"></a>00098 <a class="code" href="group__utils.html#gade35baf670a48177d9469905159089e7" title="Convert ticks to micro seconds.">nl_ticks2us</a>(sfq->qs_perturb * <a class="code" href="group__utils.html#ga9aa52772ddedc62e60f5ecfc9a66ea89" title="Return the value of HZ.">nl_get_hz</a>()));
<a name="l00099"></a>00099
<a name="l00100"></a>00100 <span class="keywordflow">return</span> line;
<a name="l00101"></a>00101 }
<a name="l00102"></a>00102
<a name="l00103"></a>00103 <span class="keyword">static</span> <span class="keywordtype">int</span> sfq_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="l00104"></a>00104 <span class="keywordtype">int</span> line)
<a name="l00105"></a>00105 {
<a name="l00106"></a>00106 <span class="keyword">struct </span>rtnl_sfq *sfq = sfq_qdisc(qdisc);
<a name="l00107"></a>00107
<a name="l00108"></a>00108 <span class="keywordflow">if</span> (sfq)
<a name="l00109"></a>00109 dp_dump(p, <span class="stringliteral">"limit %u divisor %u"</span>,
<a name="l00110"></a>00110 sfq->qs_limit, sfq->qs_divisor);
<a name="l00111"></a>00111
<a name="l00112"></a>00112 <span class="keywordflow">return</span> line;
<a name="l00113"></a>00113 }
<a name="l00114"></a>00114
<a name="l00115"></a>00115 <span class="keyword">static</span> <span class="keyword">struct </span>nl_msg *sfq_get_opts(<span class="keyword">struct</span> rtnl_qdisc *qdisc)
<a name="l00116"></a>00116 {
<a name="l00117"></a>00117 <span class="keyword">struct </span>rtnl_sfq *sfq;
<a name="l00118"></a>00118 <span class="keyword">struct </span>tc_sfq_qopt opts;
<a name="l00119"></a>00119 <span class="keyword">struct </span>nl_msg *msg;
<a name="l00120"></a>00120
<a name="l00121"></a>00121 sfq = sfq_qdisc(qdisc);
<a name="l00122"></a>00122 <span class="keywordflow">if</span> (!sfq)
<a name="l00123"></a>00123 <span class="keywordflow">return</span> NULL;
<a name="l00124"></a>00124
<a name="l00125"></a>00125 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="l00126"></a>00126 <span class="keywordflow">if</span> (!msg)
<a name="l00127"></a>00127 <span class="keywordflow">goto</span> errout;
<a name="l00128"></a>00128
<a name="l00129"></a>00129 memset(&opts, 0, <span class="keyword">sizeof</span>(opts));
<a name="l00130"></a>00130 opts.quantum = sfq->qs_quantum;
<a name="l00131"></a>00131 opts.perturb_period = sfq->qs_perturb;
<a name="l00132"></a>00132 opts.limit = sfq->qs_limit;
<a name="l00133"></a>00133
<a name="l00134"></a>00134 <span class="keywordflow">if</span> (<a class="code" href="group__msg.html#gacc5e5ade5675d041f86c7c8693f7088d" title="Append data to tail of a netlink message.">nlmsg_append</a>(msg, &opts, <span class="keyword">sizeof</span>(opts), NL_DONTPAD) < 0)
<a name="l00135"></a>00135 <span class="keywordflow">goto</span> errout;
<a name="l00136"></a>00136
<a name="l00137"></a>00137 <span class="keywordflow">return</span> msg;
<a name="l00138"></a>00138 errout:
<a name="l00139"></a>00139 <a class="code" href="group__msg.html#ga138ba9bee70553f9fbe7143deacad48c" title="Free a netlink message.">nlmsg_free</a>(msg);
<a name="l00140"></a>00140 <span class="keywordflow">return</span> NULL;
<a name="l00141"></a>00141 }
<a name="l00142"></a>00142 <span class="comment"></span>
<a name="l00143"></a>00143 <span class="comment">/**</span>
<a name="l00144"></a>00144 <span class="comment"> * @name Attribute Access</span>
<a name="l00145"></a>00145 <span class="comment"> * @{</span>
<a name="l00146"></a>00146 <span class="comment"> */</span>
<a name="l00147"></a>00147 <span class="comment"></span>
<a name="l00148"></a>00148 <span class="comment">/**</span>
<a name="l00149"></a>00149 <span class="comment"> * Set quantum of SFQ qdisc.</span>
<a name="l00150"></a>00150 <span class="comment"> * @arg qdisc SFQ qdisc to be modified.</span>
<a name="l00151"></a>00151 <span class="comment"> * @arg quantum New quantum in bytes.</span>
<a name="l00152"></a>00152 <span class="comment"> * @return 0 on success or a negative error code.</span>
<a name="l00153"></a>00153 <span class="comment"> */</span>
<a name="l00154"></a><a class="code" href="group__sfq.html#ga034215d21bcb9f05b6b80d64ef12885f">00154</a> <span class="keywordtype">int</span> <a class="code" href="group__sfq.html#ga034215d21bcb9f05b6b80d64ef12885f" title="Set quantum of SFQ qdisc.">rtnl_sfq_set_quantum</a>(<span class="keyword">struct</span> rtnl_qdisc *qdisc, <span class="keywordtype">int</span> quantum)
<a name="l00155"></a>00155 {
<a name="l00156"></a>00156 <span class="keyword">struct </span>rtnl_sfq *sfq;
<a name="l00157"></a>00157
<a name="l00158"></a>00158 sfq = sfq_alloc(qdisc);
<a name="l00159"></a>00159 <span class="keywordflow">if</span> (!sfq)
<a name="l00160"></a>00160 <span class="keywordflow">return</span> nl_errno(ENOMEM);
<a name="l00161"></a>00161
<a name="l00162"></a>00162 sfq->qs_quantum = quantum;
<a name="l00163"></a>00163 sfq->qs_mask |= SCH_SFQ_ATTR_QUANTUM;
<a name="l00164"></a>00164
<a name="l00165"></a>00165 <span class="keywordflow">return</span> 0;
<a name="l00166"></a>00166 }
<a name="l00167"></a>00167 <span class="comment"></span>
<a name="l00168"></a>00168 <span class="comment">/**</span>
<a name="l00169"></a>00169 <span class="comment"> * Get quantum of SFQ qdisc.</span>
<a name="l00170"></a>00170 <span class="comment"> * @arg qdisc SFQ qdisc.</span>
<a name="l00171"></a>00171 <span class="comment"> * @return Quantum in bytes or a negative error code.</span>
<a name="l00172"></a>00172 <span class="comment"> */</span>
<a name="l00173"></a><a class="code" href="group__sfq.html#ga27047a6e57071b3abb35e654e25091d1">00173</a> <span class="keywordtype">int</span> <a class="code" href="group__sfq.html#ga27047a6e57071b3abb35e654e25091d1" title="Get quantum of SFQ qdisc.">rtnl_sfq_get_quantum</a>(<span class="keyword">struct</span> rtnl_qdisc *qdisc)
<a name="l00174"></a>00174 {
<a name="l00175"></a>00175 <span class="keyword">struct </span>rtnl_sfq *sfq;
<a name="l00176"></a>00176
<a name="l00177"></a>00177 sfq = sfq_qdisc(qdisc);
<a name="l00178"></a>00178 <span class="keywordflow">if</span> (sfq && sfq->qs_mask & SCH_SFQ_ATTR_QUANTUM)
<a name="l00179"></a>00179 <span class="keywordflow">return</span> sfq->qs_quantum;
<a name="l00180"></a>00180 <span class="keywordflow">else</span>
<a name="l00181"></a>00181 <span class="keywordflow">return</span> nl_errno(ENOENT);
<a name="l00182"></a>00182 }
<a name="l00183"></a>00183 <span class="comment"></span>
<a name="l00184"></a>00184 <span class="comment">/**</span>
<a name="l00185"></a>00185 <span class="comment"> * Set limit of SFQ qdisc.</span>
<a name="l00186"></a>00186 <span class="comment"> * @arg qdisc SFQ qdisc to be modified.</span>
<a name="l00187"></a>00187 <span class="comment"> * @arg limit New limit in number of packets.</span>
<a name="l00188"></a>00188 <span class="comment"> * @return 0 on success or a negative error code.</span>
<a name="l00189"></a>00189 <span class="comment"> */</span>
<a name="l00190"></a><a class="code" href="group__sfq.html#gafdf7cd6a80e2c8abd43e9f524be0f3ea">00190</a> <span class="keywordtype">int</span> <a class="code" href="group__sfq.html#gafdf7cd6a80e2c8abd43e9f524be0f3ea" title="Set limit of SFQ qdisc.">rtnl_sfq_set_limit</a>(<span class="keyword">struct</span> rtnl_qdisc *qdisc, <span class="keywordtype">int</span> limit)
<a name="l00191"></a>00191 {
<a name="l00192"></a>00192 <span class="keyword">struct </span>rtnl_sfq *sfq;
<a name="l00193"></a>00193
<a name="l00194"></a>00194 sfq = sfq_alloc(qdisc);
<a name="l00195"></a>00195 <span class="keywordflow">if</span> (!sfq)
<a name="l00196"></a>00196 <span class="keywordflow">return</span> nl_errno(ENOMEM);
<a name="l00197"></a>00197
<a name="l00198"></a>00198 sfq->qs_limit = limit;
<a name="l00199"></a>00199 sfq->qs_mask |= SCH_SFQ_ATTR_LIMIT;
<a name="l00200"></a>00200
<a name="l00201"></a>00201 <span class="keywordflow">return</span> 0;
<a name="l00202"></a>00202 }
<a name="l00203"></a>00203 <span class="comment"></span>
<a name="l00204"></a>00204 <span class="comment">/**</span>
<a name="l00205"></a>00205 <span class="comment"> * Get limit of SFQ qdisc.</span>
<a name="l00206"></a>00206 <span class="comment"> * @arg qdisc SFQ qdisc.</span>
<a name="l00207"></a>00207 <span class="comment"> * @return Limit or a negative error code.</span>
<a name="l00208"></a>00208 <span class="comment"> */</span>
<a name="l00209"></a><a class="code" href="group__sfq.html#gacacbff614291ea8fc35ffddb2f68351f">00209</a> <span class="keywordtype">int</span> <a class="code" href="group__sfq.html#gacacbff614291ea8fc35ffddb2f68351f" title="Get limit of SFQ qdisc.">rtnl_sfq_get_limit</a>(<span class="keyword">struct</span> rtnl_qdisc *qdisc)
<a name="l00210"></a>00210 {
<a name="l00211"></a>00211 <span class="keyword">struct </span>rtnl_sfq *sfq;
<a name="l00212"></a>00212
<a name="l00213"></a>00213 sfq = sfq_qdisc(qdisc);
<a name="l00214"></a>00214 <span class="keywordflow">if</span> (sfq && sfq->qs_mask & SCH_SFQ_ATTR_LIMIT)
<a name="l00215"></a>00215 <span class="keywordflow">return</span> sfq->qs_limit;
<a name="l00216"></a>00216 <span class="keywordflow">else</span>
<a name="l00217"></a>00217 <span class="keywordflow">return</span> nl_errno(ENOENT);
<a name="l00218"></a>00218 }
<a name="l00219"></a>00219 <span class="comment"></span>
<a name="l00220"></a>00220 <span class="comment">/**</span>
<a name="l00221"></a>00221 <span class="comment"> * Set perturbation interval of SFQ qdisc.</span>
<a name="l00222"></a>00222 <span class="comment"> * @arg qdisc SFQ qdisc to be modified.</span>
<a name="l00223"></a>00223 <span class="comment"> * @arg perturb New perturbation interval in seconds.</span>
<a name="l00224"></a>00224 <span class="comment"> * @note A value of 0 disables perturbation altogether.</span>
<a name="l00225"></a>00225 <span class="comment"> * @return 0 on success or a negative error code.</span>
<a name="l00226"></a>00226 <span class="comment"> */</span>
<a name="l00227"></a><a class="code" href="group__sfq.html#ga8b86cde41ece1a5ce8c8df129411e382">00227</a> <span class="keywordtype">int</span> <a class="code" href="group__sfq.html#ga8b86cde41ece1a5ce8c8df129411e382" title="Set perturbation interval of SFQ qdisc.">rtnl_sfq_set_perturb</a>(<span class="keyword">struct</span> rtnl_qdisc *qdisc, <span class="keywordtype">int</span> perturb)
<a name="l00228"></a>00228 {
<a name="l00229"></a>00229 <span class="keyword">struct </span>rtnl_sfq *sfq;
<a name="l00230"></a>00230
<a name="l00231"></a>00231 sfq = sfq_alloc(qdisc);
<a name="l00232"></a>00232 <span class="keywordflow">if</span> (!sfq)
<a name="l00233"></a>00233 <span class="keywordflow">return</span> nl_errno(ENOMEM);
<a name="l00234"></a>00234
<a name="l00235"></a>00235 sfq->qs_perturb = perturb;
<a name="l00236"></a>00236 sfq->qs_mask |= SCH_SFQ_ATTR_PERTURB;
<a name="l00237"></a>00237
<a name="l00238"></a>00238 <span class="keywordflow">return</span> 0;
<a name="l00239"></a>00239 }
<a name="l00240"></a>00240 <span class="comment"></span>
<a name="l00241"></a>00241 <span class="comment">/**</span>
<a name="l00242"></a>00242 <span class="comment"> * Get perturbation interval of SFQ qdisc.</span>
<a name="l00243"></a>00243 <span class="comment"> * @arg qdisc SFQ qdisc.</span>
<a name="l00244"></a>00244 <span class="comment"> * @return Perturbation interval in seconds or a negative error code.</span>
<a name="l00245"></a>00245 <span class="comment"> */</span>
<a name="l00246"></a><a class="code" href="group__sfq.html#ga876d1c7691139e98e73943275515dba0">00246</a> <span class="keywordtype">int</span> <a class="code" href="group__sfq.html#ga876d1c7691139e98e73943275515dba0" title="Get perturbation interval of SFQ qdisc.">rtnl_sfq_get_perturb</a>(<span class="keyword">struct</span> rtnl_qdisc *qdisc)
<a name="l00247"></a>00247 {
<a name="l00248"></a>00248 <span class="keyword">struct </span>rtnl_sfq *sfq;
<a name="l00249"></a>00249
<a name="l00250"></a>00250 sfq = sfq_qdisc(qdisc);
<a name="l00251"></a>00251 <span class="keywordflow">if</span> (sfq && sfq->qs_mask & SCH_SFQ_ATTR_PERTURB)
<a name="l00252"></a>00252 <span class="keywordflow">return</span> sfq->qs_perturb;
<a name="l00253"></a>00253 <span class="keywordflow">else</span>
<a name="l00254"></a>00254 <span class="keywordflow">return</span> nl_errno(ENOENT);
<a name="l00255"></a>00255 }
<a name="l00256"></a>00256 <span class="comment"></span>
<a name="l00257"></a>00257 <span class="comment">/**</span>
<a name="l00258"></a>00258 <span class="comment"> * Get divisor of SFQ qdisc.</span>
<a name="l00259"></a>00259 <span class="comment"> * @arg qdisc SFQ qdisc.</span>
<a name="l00260"></a>00260 <span class="comment"> * @return Divisor in number of entries or a negative error code.</span>
<a name="l00261"></a>00261 <span class="comment"> */</span>
<a name="l00262"></a><a class="code" href="group__sfq.html#ga673ca724807fae25093b168181226449">00262</a> <span class="keywordtype">int</span> <a class="code" href="group__sfq.html#ga673ca724807fae25093b168181226449" title="Get divisor of SFQ qdisc.">rtnl_sfq_get_divisor</a>(<span class="keyword">struct</span> rtnl_qdisc *qdisc)
<a name="l00263"></a>00263 {
<a name="l00264"></a>00264 <span class="keyword">struct </span>rtnl_sfq *sfq;
<a name="l00265"></a>00265
<a name="l00266"></a>00266 sfq = sfq_qdisc(qdisc);
<a name="l00267"></a>00267 <span class="keywordflow">if</span> (sfq && sfq->qs_mask & SCH_SFQ_ATTR_DIVISOR)
<a name="l00268"></a>00268 <span class="keywordflow">return</span> sfq->qs_divisor;
<a name="l00269"></a>00269 <span class="keywordflow">else</span>
<a name="l00270"></a>00270 <span class="keywordflow">return</span> nl_errno(ENOENT);
<a name="l00271"></a>00271 }
<a name="l00272"></a>00272 <span class="comment"></span>
<a name="l00273"></a>00273 <span class="comment">/** @} */</span>
<a name="l00274"></a>00274
<a name="l00275"></a>00275 <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> sfq_ops = {
<a name="l00276"></a>00276 .<a class="code" href="structrtnl__qdisc__ops.html#a5df5424d29acfa9ae66e7f35a9ca2081" title="Kind/Name of Qdisc.">qo_kind</a> = <span class="stringliteral">"sfq"</span>,
<a name="l00277"></a>00277 .qo_msg_parser = sfq_msg_parser,
<a name="l00278"></a>00278 .qo_free_data = sfq_free_data,
<a name="l00279"></a>00279 .qo_dump[<a class="code" href="group__utils.html#ggacfb5566c73f0965c5241d7d49bc717e9a5597887c080d5ecae358b6065a4048fd" title="Dump object in a brief one-liner.">NL_DUMP_BRIEF</a>] = sfq_dump_brief,
<a name="l00280"></a>00280 .qo_dump[<a class="code" href="group__utils.html#ggacfb5566c73f0965c5241d7d49bc717e9a1445106c7af529b2c99ee289fbcd3179" title="Dump all attributes but no statistics.">NL_DUMP_FULL</a>] = sfq_dump_full,
<a name="l00281"></a>00281 .qo_get_opts = sfq_get_opts,
<a name="l00282"></a>00282 };
<a name="l00283"></a>00283
<a name="l00284"></a>00284 <span class="keyword">static</span> <span class="keywordtype">void</span> __init sfq_init(<span class="keywordtype">void</span>)
<a name="l00285"></a>00285 {
<a name="l00286"></a>00286 <a class="code" href="group__qdisc__api.html#ga52a96211c54bed89f60bc4b106747133" title="Register a qdisc module.">rtnl_qdisc_register</a>(&sfq_ops);
<a name="l00287"></a>00287 }
<a name="l00288"></a>00288
<a name="l00289"></a>00289 <span class="keyword">static</span> <span class="keywordtype">void</span> __exit sfq_exit(<span class="keywordtype">void</span>)
<a name="l00290"></a>00290 {
<a name="l00291"></a>00291 <a class="code" href="group__qdisc__api.html#ga0e1c8c70c536964578dd544fd23f80ff" title="Unregister a qdisc module.">rtnl_qdisc_unregister</a>(&sfq_ops);
<a name="l00292"></a>00292 }
<a name="l00293"></a>00293 <span class="comment"></span>
<a name="l00294"></a>00294 <span class="comment">/** @} */</span>
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