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This may be the combination of directive type, and operation, as +well as number of requested resource if specific operation needs it.</p></div> +<div class="paragraph"><p>The <device> parameter is mandatory and may be either the NVMe character +device (ex: /dev/nvme0), or a namespace block device (ex: /dev/nvme0n1).</p></div> +<div class="paragraph"><p>On success, the returned directive’s parameter structure (if applicable) is +returned in one of several ways depending on the option flags; the +structure may parsed by the program and printed in a readable format +if it is a known structure, displayed in hex, or the raw buffer may be +printed to stdout for another program to parse.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_options">OPTIONS</h2> +<div class="sectionbody"> +<div class="dlist"><dl> +<dt class="hdlist1"> +-n <nsid> +</dt> +<dt class="hdlist1"> +--namespace-id=<nsid> +</dt> +<dd> +<p> + Retrieve the feature for the given nsid. This is optional and + most features do not use this value. +</p> +</dd> +<dt class="hdlist1"> +-D <dtype> +</dt> +<dt class="hdlist1"> +--dir-type=<dtype> +</dt> +<dd> +<p> + Directive type +</p> +</dd> +<dt class="hdlist1"> +-S <dspec> +</dt> +<dt class="hdlist1"> +--dir-spec=<dspec> +</dt> +<dd> +<p> + Directive specific +</p> +</dd> +<dt class="hdlist1"> +-O <doper> +</dt> +<dt class="hdlist1"> +--dir-oper=<doper> +</dt> +<dd> +<p> + Directive operation +</p> +</dd> +<dt class="hdlist1"> +-r <nsr> +</dt> +<dt class="hdlist1"> +--req-resource=<nsr> +</dt> +<dd> +<p> + Directive requested resource count +</p> +</dd> +</dl></div> +<div class="paragraph"><p>+</p></div> +<div class="tableblock"> +<table rules="all" +width="100%" +frame="border" +cellspacing="0" cellpadding="4"> +<col width="50%" /> +<col width="50%" /> +<tbody> +<tr> +<td align="left" valign="top"><p class="table">Select</p></td> +<td align="left" valign="top"><p class="table">Description</p></td> +</tr> +<tr> +<td align="left" valign="top"><p class="table">0</p></td> +<td align="left" valign="top"><p class="table">Current</p></td> +</tr> +<tr> +<td align="left" valign="top"><p class="table">1</p></td> +<td align="left" valign="top"><p class="table">Default</p></td> +</tr> +<tr> +<td align="left" valign="top"><p class="table">2</p></td> +<td align="left" valign="top"><p class="table">Saved</p></td> +</tr> +<tr> +<td align="left" valign="top"><p class="table">3</p></td> +<td align="left" valign="top"><p class="table">Supported capabilities</p></td> +</tr> +<tr> +<td align="left" valign="top"><p class="table">4–7</p></td> +<td align="left" valign="top"><p class="table">Reserved</p></td> +</tr> +</tbody> +</table> +</div> +<div class="dlist"><dl> +<dt class="hdlist1"> +-l <data-len> +</dt> +<dt class="hdlist1"> +--data-len=<data-len> +</dt> +<dd> +<p> + The data length for the buffer returned for this feature. Most + known features do not use this value. The exception is LBA + Range Type +</p> +</dd> +<dt class="hdlist1"> +-b +</dt> +<dt class="hdlist1"> +--raw-binary +</dt> +<dd> +<p> + Print the raw receive buffer to stdout if the command returns + a structure. +</p> +</dd> +<dt class="hdlist1"> +-H +</dt> +<dt class="hdlist1"> +--human-readable +</dt> +<dd> +<p> + Print the decoded receive buffer to stdout if the command returns + a structure. +</p> +</dd> +</dl></div> +</div> +</div> +<div class="sect1"> +<h2 id="_examples">EXAMPLES</h2> +<div class="sectionbody"> +<div class="ulist"><ul> +<li> +<p> +Identify directive type supported : +</p> +<div class="listingblock"> +<div class="content"> +<pre><code># nvme dir-receive /dev/nvme0 --dir-type 0 --dir-oper 1 --human-readable</code></pre> +</div></div> +</li> +<li> +<p> +Get stream directive parameters : +</p> +<div class="listingblock"> +<div class="content"> +<pre><code># nvme dir-receive /dev/nvme0 --dir-type 1 --dir-oper 1 --human-readable</code></pre> +</div></div> +</li> +<li> +<p> +Allocate 3 streams for namespace 1 +</p> +<div class="listingblock"> +<div class="content"> +<pre><code># nvme dir-receive /dev/nvme0n1 --dir-type 1 --dir-oper 3 --req-resource 3 --human-readable</code></pre> +</div></div> +</li> +<li> +<p> +Get streams directive status : +</p> +<div class="listingblock"> +<div class="content"> +<pre><code># nvme dir-receive /dev/nvme0 --dir-type 1 --dir-oper 2 --human-readable</code></pre> +</div></div> +<div class="paragraph"><p>It is probably a bad idea to not redirect stdout when using this mode.</p></div> +</li> +</ul></div> +</div> +</div> +<div class="sect1"> +<h2 id="_nvme">NVME</h2> +<div class="sectionbody"> +<div class="paragraph"><p>Part of the nvme-user suite</p></div> +</div> +</div> +</div> +<div id="footnotes"><hr /></div> +<div id="footer"> +<div id="footer-text"> +Last updated + 2017-08-10 18:23:42 PDT +</div> +</div> +</body> +</html> |