diff options
Diffstat (limited to 'static/freebsd/man9/VOP_LOCK.9 4.html')
| -rw-r--r-- | static/freebsd/man9/VOP_LOCK.9 4.html | 128 |
1 files changed, 0 insertions, 128 deletions
diff --git a/static/freebsd/man9/VOP_LOCK.9 4.html b/static/freebsd/man9/VOP_LOCK.9 4.html deleted file mode 100644 index 1045d3fb..00000000 --- a/static/freebsd/man9/VOP_LOCK.9 4.html +++ /dev/null @@ -1,128 +0,0 @@ -<table class="head"> - <tr> - <td class="head-ltitle">VOP_LOCK(9)</td> - <td class="head-vol">Kernel Developer's Manual</td> - <td class="head-rtitle">VOP_LOCK(9)</td> - </tr> -</table> -<div class="manual-text"> -<section class="Sh"> -<h1 class="Sh" id="NAME"><a class="permalink" href="#NAME">NAME</a></h1> -<p class="Pp"><code class="Nm">VOP_LOCK</code>, - <code class="Nm">VOP_UNLOCK</code>, <code class="Nm">VOP_ISLOCKED</code>, - <code class="Nm">vn_lock</code> — <span class="Nd">serialize access - to a vnode</span></p> -</section> -<section class="Sh"> -<h1 class="Sh" id="SYNOPSIS"><a class="permalink" href="#SYNOPSIS">SYNOPSIS</a></h1> -<p class="Pp"><code class="In">#include - <<a class="In">sys/param.h</a>></code> - <br/> - <code class="In">#include <<a class="In">sys/lock.h</a>></code> - <br/> - <code class="In">#include <<a class="In">sys/vnode.h</a>></code></p> -<p class="Pp"><var class="Ft">int</var> - <br/> - <code class="Fn">VOP_LOCK</code>(<var class="Fa" style="white-space: nowrap;">struct - vnode *vp</var>, <var class="Fa" style="white-space: nowrap;">int - flags</var>);</p> -<p class="Pp"><var class="Ft">int</var> - <br/> - <code class="Fn">VOP_UNLOCK</code>(<var class="Fa" style="white-space: nowrap;">struct - vnode *vp</var>);</p> -<p class="Pp"><var class="Ft">int</var> - <br/> - <code class="Fn">VOP_ISLOCKED</code>(<var class="Fa" style="white-space: nowrap;">struct - vnode *vp</var>);</p> -<p class="Pp"><var class="Ft">int</var> - <br/> - <code class="Fn">vn_lock</code>(<var class="Fa" style="white-space: nowrap;">struct - vnode *vp</var>, <var class="Fa" style="white-space: nowrap;">int - flags</var>);</p> -</section> -<section class="Sh"> -<h1 class="Sh" id="DESCRIPTION"><a class="permalink" href="#DESCRIPTION">DESCRIPTION</a></h1> -<p class="Pp">These calls are used to serialize access to the file system, such - as to prevent two writes to the same file from happening at the same - time.</p> -<p class="Pp">The arguments are:</p> -<dl class="Bl-tag"> - <dt><var class="Fa">vp</var></dt> - <dd>The vnode being locked or unlocked.</dd> - <dt><var class="Fa">flags</var></dt> - <dd>One of the lock request types: - <p class="Pp"></p> - <div class="Bd-indent"> - <dl class="Bl-tag Bl-compact"> - <dt id="LK_SHARED"><a class="permalink" href="#LK_SHARED"><code class="Dv">LK_SHARED</code></a></dt> - <dd>Shared lock.</dd> - <dt id="LK_EXCLUSIVE"><a class="permalink" href="#LK_EXCLUSIVE"><code class="Dv">LK_EXCLUSIVE</code></a></dt> - <dd>Exclusive lock.</dd> - <dt id="LK_UPGRADE"><a class="permalink" href="#LK_UPGRADE"><code class="Dv">LK_UPGRADE</code></a></dt> - <dd>Shared-to-exclusive upgrade.</dd> - <dt id="LK_DOWNGRADE"><a class="permalink" href="#LK_DOWNGRADE"><code class="Dv">LK_DOWNGRADE</code></a></dt> - <dd>Exclusive-to-shared downgrade.</dd> - <dt id="LK_RELEASE"><a class="permalink" href="#LK_RELEASE"><code class="Dv">LK_RELEASE</code></a></dt> - <dd>Release any type of lock.</dd> - <dt id="LK_DRAIN"><a class="permalink" href="#LK_DRAIN"><code class="Dv">LK_DRAIN</code></a></dt> - <dd>Wait for all lock activity to end.</dd> - </dl> - </div> - <p class="Pp">The lock type may be <i class="Em">or</i>'ed with these lock - flags:</p> - <p class="Pp"></p> - <div class="Bd-indent"> - <dl class="Bl-tag Bl-compact"> - <dt id="LK_NOWAIT"><a class="permalink" href="#LK_NOWAIT"><code class="Dv">LK_NOWAIT</code></a></dt> - <dd>Do not sleep to wait for lock.</dd> - <dt id="LK_SLEEPFAIL"><a class="permalink" href="#LK_SLEEPFAIL"><code class="Dv">LK_SLEEPFAIL</code></a></dt> - <dd>Sleep, then return failure.</dd> - <dt id="LK_CANRECURSE"><a class="permalink" href="#LK_CANRECURSE"><code class="Dv">LK_CANRECURSE</code></a></dt> - <dd>Allow recursive exclusive lock.</dd> - <dt id="LK_NOWITNESS"><a class="permalink" href="#LK_NOWITNESS"><code class="Dv">LK_NOWITNESS</code></a></dt> - <dd>Instruct <a class="Xr">witness(4)</a> to ignore this instance.</dd> - </dl> - </div> - <p class="Pp">The lock type may be <i class="Em">or</i>'ed with these - control flags:</p> - <p class="Pp"></p> - <div class="Bd-indent"> - <dl class="Bl-tag Bl-compact"> - <dt id="LK_INTERLOCK"><a class="permalink" href="#LK_INTERLOCK"><code class="Dv">LK_INTERLOCK</code></a></dt> - <dd>Specify when the caller already has a simple lock - (<a class="permalink" href="#VOP_LOCK"><code class="Fn" id="VOP_LOCK">VOP_LOCK</code></a>() - will unlock the simple lock after getting the lock).</dd> - <dt id="LK_RETRY"><a class="permalink" href="#LK_RETRY"><code class="Dv">LK_RETRY</code></a></dt> - <dd>Retry until locked.</dd> - </dl> - </div> - <p class="Pp" id="vn_lock">Kernel code should use - <a class="permalink" href="#vn_lock"><code class="Fn">vn_lock</code></a>() - to lock a vnode rather than calling <code class="Fn">VOP_LOCK</code>() - directly. <code class="Fn">vn_lock</code>() also does not want a thread - specified as argument but it assumes curthread to be used.</p> - </dd> -</dl> -</section> -<section class="Sh"> -<h1 class="Sh" id="RETURN_VALUES"><a class="permalink" href="#RETURN_VALUES">RETURN - VALUES</a></h1> -<p class="Pp">Zero is returned on success, otherwise an error is returned.</p> -</section> -<section class="Sh"> -<h1 class="Sh" id="SEE_ALSO"><a class="permalink" href="#SEE_ALSO">SEE - ALSO</a></h1> -<p class="Pp"><a class="Xr">vnode(9)</a></p> -</section> -<section class="Sh"> -<h1 class="Sh" id="AUTHORS"><a class="permalink" href="#AUTHORS">AUTHORS</a></h1> -<p class="Pp">This manual page was written by <span class="An">Doug - Rabson</span>.</p> -</section> -</div> -<table class="foot"> - <tr> - <td class="foot-date">August 23, 2022</td> - <td class="foot-os">FreeBSD 15.0</td> - </tr> -</table> |