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| author | Jacob McDonnell <jacob@jacobmcdonnell.com> | 2026-04-25 19:59:05 -0400 |
|---|---|---|
| committer | Jacob McDonnell <jacob@jacobmcdonnell.com> | 2026-04-25 19:59:05 -0400 |
| commit | 1f19f33e45791ea59aed048796fc68672c6723a5 (patch) | |
| tree | 54625fba89e91d1c2177801ec635e8528bba937f /static/netbsd/man9/vnodeops.9 3.html | |
| parent | ac5e55f5f2af5b92794c2aded46c6bae85b5f5ed (diff) | |
docs: Removed Precompiled HTML
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| -rw-r--r-- | static/netbsd/man9/vnodeops.9 3.html | 1441 |
1 files changed, 0 insertions, 1441 deletions
diff --git a/static/netbsd/man9/vnodeops.9 3.html b/static/netbsd/man9/vnodeops.9 3.html deleted file mode 100644 index 17e8c6f5..00000000 --- a/static/netbsd/man9/vnodeops.9 3.html +++ /dev/null @@ -1,1441 +0,0 @@ -<table class="head"> - <tr> - <td class="head-ltitle">VNODEOPS(9)</td> - <td class="head-vol">Kernel Developer's Manual</td> - <td class="head-rtitle">VNODEOPS(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">vnodeops</code>, - <code class="Nm">VOP_LOOKUP</code>, <code class="Nm">VOP_CREATE</code>, - <code class="Nm">VOP_MKNOD</code>, <code class="Nm">VOP_OPEN</code>, - <code class="Nm">VOP_CLOSE</code>, <code class="Nm">VOP_ACCESS</code>, - <code class="Nm">VOP_GETATTR</code>, <code class="Nm">VOP_SETATTR</code>, - <code class="Nm">VOP_READ</code>, <code class="Nm">VOP_WRITE</code>, - <code class="Nm">VOP_FALLOCATE</code>, <code class="Nm">VOP_FDISCARD</code>, - <code class="Nm">VOP_IOCTL</code>, <code class="Nm">VOP_FCNTL</code>, - <code class="Nm">VOP_POLL</code>, <code class="Nm">VOP_KQFILTER</code>, - <code class="Nm">VOP_REVOKE</code>, <code class="Nm">VOP_MMAP</code>, - <code class="Nm">VOP_FSYNC</code>, <code class="Nm">VOP_SEEK</code>, - <code class="Nm">VOP_REMOVE</code>, <code class="Nm">VOP_LINK</code>, - <code class="Nm">VOP_RENAME</code>, <code class="Nm">VOP_MKDIR</code>, - <code class="Nm">VOP_RMDIR</code>, <code class="Nm">VOP_SYMLINK</code>, - <code class="Nm">VOP_READDIR</code>, <code class="Nm">VOP_READLINK</code>, - <code class="Nm">VOP_ABORTOP</code>, <code class="Nm">VOP_INACTIVE</code>, - <code class="Nm">VOP_RECLAIM</code>, <code class="Nm">VOP_LOCK</code>, - <code class="Nm">VOP_UNLOCK</code>, <code class="Nm">VOP_ISLOCKED</code>, - <code class="Nm">VOP_BMAP</code>, <code class="Nm">VOP_PRINT</code>, - <code class="Nm">VOP_PATHCONF</code>, <code class="Nm">VOP_ADVLOCK</code>, - <code class="Nm">VOP_WHITEOUT</code>, <code class="Nm">VOP_GETPAGES</code>, - <code class="Nm">VOP_PUTPAGES</code>, <code class="Nm">VOP_STRATEGY</code>, - <code class="Nm">VOP_BWRITE</code>, <code class="Nm">VOP_GETEXTATTR</code>, - <code class="Nm">VOP_SETEXTATTR</code>, - <code class="Nm">VOP_LISTEXTATTR</code>, - <code class="Nm">VOP_DELETEEXTATTR</code> — <span class="Nd">vnode - operations</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/buf.h</a>></code> - <br/> - <code class="In">#include <<a class="In">sys/dirent.h</a>></code> - <br/> - <code class="In">#include <<a class="In">sys/vnode.h</a>></code> - <br/> - <code class="In">#include <<a class="In">sys/mount.h</a>></code> - <br/> - <code class="In">#include <<a class="In">sys/namei.h</a>></code> - <br/> - <code class="In">#include <<a class="In">sys/unistd.h</a>></code> - <br/> - <code class="In">#include <<a class="In">sys/fcntl.h</a>></code> - <br/> - <code class="In">#include <<a class="In">sys/lockf.h</a>></code> - <br/> - <code class="In">#include <<a class="In">sys/extattr.h</a>></code></p> -<p class="Pp"><var class="Ft">int</var> - <br/> - <code class="Fn">VOP_LOOKUP</code>(<var class="Fa" style="white-space: nowrap;">struct - vnode *dvp</var>, <var class="Fa" style="white-space: nowrap;">struct vnode - **vpp</var>, <var class="Fa" style="white-space: nowrap;">struct - componentname *cnp</var>);</p> -<p class="Pp"><var class="Ft">int</var> - <br/> - <code class="Fn">VOP_CREATE</code>(<var class="Fa" style="white-space: nowrap;">struct - vnode *dvp</var>, <var class="Fa" style="white-space: nowrap;">struct vnode - **vpp</var>, <var class="Fa" style="white-space: nowrap;">struct - componentname *cnp</var>, - <var class="Fa" style="white-space: nowrap;">struct vattr *vap</var>);</p> -<p class="Pp"><var class="Ft">int</var> - <br/> - <code class="Fn">VOP_MKNOD</code>(<var class="Fa" style="white-space: nowrap;">struct - vnode *dvp</var>, <var class="Fa" style="white-space: nowrap;">struct vnode - **vpp</var>, <var class="Fa" style="white-space: nowrap;">struct - componentname *cnp</var>, - <var class="Fa" style="white-space: nowrap;">struct vattr *vap</var>);</p> -<p class="Pp"><var class="Ft">int</var> - <br/> - <code class="Fn">VOP_OPEN</code>(<var class="Fa" style="white-space: nowrap;">struct - vnode *vp</var>, <var class="Fa" style="white-space: nowrap;">int - mode</var>, <var class="Fa" style="white-space: nowrap;">kauth_cred_t - cred</var>);</p> -<p class="Pp"><var class="Ft">int</var> - <br/> - <code class="Fn">VOP_CLOSE</code>(<var class="Fa" style="white-space: nowrap;">struct - vnode *vp</var>, <var class="Fa" style="white-space: nowrap;">int - fflag</var>, <var class="Fa" style="white-space: nowrap;">kauth_cred_t - cred</var>);</p> -<p class="Pp"><var class="Ft">int</var> - <br/> - <code class="Fn">VOP_ACCESS</code>(<var class="Fa" style="white-space: nowrap;">struct - vnode *vp</var>, <var class="Fa" style="white-space: nowrap;">int - mode</var>, <var class="Fa" style="white-space: nowrap;">kauth_cred_t - cred</var>);</p> -<p class="Pp"><var class="Ft">int</var> - <br/> - <code class="Fn">VOP_GETATTR</code>(<var class="Fa" style="white-space: nowrap;">struct - vnode *vp</var>, <var class="Fa" style="white-space: nowrap;">struct vattr - *vap</var>, <var class="Fa" style="white-space: nowrap;">kauth_cred_t - cred</var>);</p> -<p class="Pp"><var class="Ft">int</var> - <br/> - <code class="Fn">VOP_SETATTR</code>(<var class="Fa" style="white-space: nowrap;">struct - vnode *vp</var>, <var class="Fa" style="white-space: nowrap;">struct vattr - *vap</var>, <var class="Fa" style="white-space: nowrap;">kauth_cred_t - cred</var>);</p> -<p class="Pp"><var class="Ft">int</var> - <br/> - <code class="Fn">VOP_READ</code>(<var class="Fa" style="white-space: nowrap;">struct - vnode *vp</var>, <var class="Fa" style="white-space: nowrap;">struct uio - *uio</var>, <var class="Fa" style="white-space: nowrap;">int ioflag</var>, - <var class="Fa" style="white-space: nowrap;">kauth_cred_t cred</var>);</p> -<p class="Pp"><var class="Ft">int</var> - <br/> - <code class="Fn">VOP_WRITE</code>(<var class="Fa" style="white-space: nowrap;">struct - vnode *vp</var>, <var class="Fa" style="white-space: nowrap;">struct uio - *uio</var>, <var class="Fa" style="white-space: nowrap;">int ioflag</var>, - <var class="Fa" style="white-space: nowrap;">kauth_cred_t cred</var>);</p> -<p class="Pp"><var class="Ft">int</var> - <br/> - <code class="Fn">VOP_FALLOCATE</code>(<var class="Fa" style="white-space: nowrap;">struct - vnode *vp</var>, <var class="Fa" style="white-space: nowrap;">off_t - pos</var>, <var class="Fa" style="white-space: nowrap;">off_t - len</var>);</p> -<p class="Pp"><var class="Ft">int</var> - <br/> - <code class="Fn">VOP_FDISCARD</code>(<var class="Fa" style="white-space: nowrap;">struct - vnode *vp</var>, <var class="Fa" style="white-space: nowrap;">off_t - pos</var>, <var class="Fa" style="white-space: nowrap;">off_t - len</var>);</p> -<p class="Pp"><var class="Ft">int</var> - <br/> - <code class="Fn">VOP_IOCTL</code>(<var class="Fa" style="white-space: nowrap;">struct - vnode *vp</var>, <var class="Fa" style="white-space: nowrap;">u_long - command</var>, <var class="Fa" style="white-space: nowrap;">void - *data</var>, <var class="Fa" style="white-space: nowrap;">int fflag</var>, - <var class="Fa" style="white-space: nowrap;">kauth_cred_t cred</var>);</p> -<p class="Pp"><var class="Ft">int</var> - <br/> - <code class="Fn">VOP_FCNTL</code>(<var class="Fa" style="white-space: nowrap;">struct - vnode *vp</var>, <var class="Fa" style="white-space: nowrap;">u_int - command</var>, <var class="Fa" style="white-space: nowrap;">void - *data</var>, <var class="Fa" style="white-space: nowrap;">int fflag</var>, - <var class="Fa" style="white-space: nowrap;">kauth_cred_t cred</var>);</p> -<p class="Pp"><var class="Ft">int</var> - <br/> - <code class="Fn">VOP_POLL</code>(<var class="Fa" style="white-space: nowrap;">struct - vnode *vp</var>, <var class="Fa" style="white-space: nowrap;">int - events</var>);</p> -<p class="Pp"><var class="Ft">int</var> - <br/> - <code class="Fn">VOP_KQFILTER</code>(<var class="Fa" style="white-space: nowrap;">struct - vnode *vp</var>, <var class="Fa" style="white-space: nowrap;">struct knote - *kn</var>);</p> -<p class="Pp"><var class="Ft">int</var> - <br/> - <code class="Fn">VOP_REVOKE</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_MMAP</code>(<var class="Fa" style="white-space: nowrap;">struct - vnode *vp</var>, <var class="Fa" style="white-space: nowrap;">vm_prot_t - prot</var>, <var class="Fa" style="white-space: nowrap;">kauth_cred_t - cred</var>);</p> -<p class="Pp"><var class="Ft">int</var> - <br/> - <code class="Fn">VOP_FSYNC</code>(<var class="Fa" style="white-space: nowrap;">struct - vnode *vp</var>, <var class="Fa" style="white-space: nowrap;">kauth_cred_t - cred</var>, <var class="Fa" style="white-space: nowrap;">int flags</var>, - <var class="Fa" style="white-space: nowrap;">off_t offlo</var>, - <var class="Fa" style="white-space: nowrap;">off_t offhi</var>);</p> -<p class="Pp"><var class="Ft">int</var> - <br/> - <code class="Fn">VOP_SEEK</code>(<var class="Fa" style="white-space: nowrap;">struct - vnode *vp</var>, <var class="Fa" style="white-space: nowrap;">off_t - oldoff</var>, <var class="Fa" style="white-space: nowrap;">off_t - newoff</var>, <var class="Fa" style="white-space: nowrap;">kauth_cred_t - cred</var>);</p> -<p class="Pp"><var class="Ft">int</var> - <br/> - <code class="Fn">VOP_REMOVE</code>(<var class="Fa" style="white-space: nowrap;">struct - vnode *dvp</var>, <var class="Fa" style="white-space: nowrap;">struct vnode - *vp</var>, <var class="Fa" style="white-space: nowrap;">struct componentname - *cnp</var>);</p> -<p class="Pp"><var class="Ft">int</var> - <br/> - <code class="Fn">VOP_LINK</code>(<var class="Fa" style="white-space: nowrap;">struct - vnode *dvp</var>, <var class="Fa" style="white-space: nowrap;">struct vnode - *vp</var>, <var class="Fa" style="white-space: nowrap;">struct componentname - *cnp</var>);</p> -<p class="Pp"><var class="Ft">int</var> - <br/> - <code class="Fn">VOP_RENAME</code>(<var class="Fa" style="white-space: nowrap;">struct - vnode *fdvp</var>, <var class="Fa" style="white-space: nowrap;">struct vnode - *fvp</var>, <var class="Fa" style="white-space: nowrap;">struct - componentname *fcnp</var>, - <var class="Fa" style="white-space: nowrap;">struct vnode *tdvp</var>, - <var class="Fa" style="white-space: nowrap;">struct vnode *tvp</var>, - <var class="Fa" style="white-space: nowrap;">struct componentname - *tcnp</var>);</p> -<p class="Pp"><var class="Ft">int</var> - <br/> - <code class="Fn">VOP_MKDIR</code>(<var class="Fa" style="white-space: nowrap;">struct - vnode *dvp</var>, <var class="Fa" style="white-space: nowrap;">struct vnode - **vpp</var>, <var class="Fa" style="white-space: nowrap;">struct - componentname *cnp</var>, - <var class="Fa" style="white-space: nowrap;">struct vattr *vap</var>);</p> -<p class="Pp"><var class="Ft">int</var> - <br/> - <code class="Fn">VOP_RMDIR</code>(<var class="Fa" style="white-space: nowrap;">struct - vnode *dvp</var>, <var class="Fa" style="white-space: nowrap;">struct vnode - *vp</var>, <var class="Fa" style="white-space: nowrap;">struct componentname - *cnp</var>);</p> -<p class="Pp"><var class="Ft">int</var> - <br/> - <code class="Fn">VOP_SYMLINK</code>(<var class="Fa" style="white-space: nowrap;">struct - vnode *dvp</var>, <var class="Fa" style="white-space: nowrap;">struct vnode - **vpp</var>, <var class="Fa" style="white-space: nowrap;">struct - componentname *cnp</var>, - <var class="Fa" style="white-space: nowrap;">struct vattr *vap</var>, - <var class="Fa" style="white-space: nowrap;">char *target</var>);</p> -<p class="Pp"><var class="Ft">int</var> - <br/> - <code class="Fn">VOP_READDIR</code>(<var class="Fa" style="white-space: nowrap;">struct - vnode *vp</var>, <var class="Fa" style="white-space: nowrap;">struct uio - *uio</var>, <var class="Fa" style="white-space: nowrap;">kauth_cred_t - cred</var>, <var class="Fa" style="white-space: nowrap;">int *eofflag</var>, - <var class="Fa" style="white-space: nowrap;">off_t **cookies</var>, - <var class="Fa" style="white-space: nowrap;">int *ncookies</var>);</p> -<p class="Pp"><var class="Ft">int</var> - <br/> - <code class="Fn">VOP_READLINK</code>(<var class="Fa" style="white-space: nowrap;">struct - vnode *vp</var>, <var class="Fa" style="white-space: nowrap;">struct uio - *uio</var>, <var class="Fa" style="white-space: nowrap;">kauth_cred_t - cred</var>);</p> -<p class="Pp"><var class="Ft">int</var> - <br/> - <code class="Fn">VOP_ABORTOP</code>(<var class="Fa" style="white-space: nowrap;">struct - vnode *dvp</var>, <var class="Fa" style="white-space: nowrap;">struct - componentname *cnp</var>);</p> -<p class="Pp"><var class="Ft">int</var> - <br/> - <code class="Fn">VOP_INACTIVE</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_RECLAIM</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_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">VOP_BMAP</code>(<var class="Fa" style="white-space: nowrap;">struct - vnode *vp</var>, <var class="Fa" style="white-space: nowrap;">daddr_t - bn</var>, <var class="Fa" style="white-space: nowrap;">struct vnode - **vpp</var>, <var class="Fa" style="white-space: nowrap;">daddr_t - *bnp</var>, <var class="Fa" style="white-space: nowrap;">int - *runp</var>);</p> -<p class="Pp"><var class="Ft">int</var> - <br/> - <code class="Fn">VOP_PRINT</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_PATHCONF</code>(<var class="Fa" style="white-space: nowrap;">struct - vnode *vp</var>, <var class="Fa" style="white-space: nowrap;">int - name</var>, <var class="Fa" style="white-space: nowrap;">register_t - *retval</var>);</p> -<p class="Pp"><var class="Ft">int</var> - <br/> - <code class="Fn">VOP_ADVLOCK</code>(<var class="Fa" style="white-space: nowrap;">struct - vnode *vp</var>, <var class="Fa" style="white-space: nowrap;">void - *id</var>, <var class="Fa" style="white-space: nowrap;">int op</var>, - <var class="Fa" style="white-space: nowrap;">struct flock *fl</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_WHITEOUT</code>(<var class="Fa" style="white-space: nowrap;">struct - vnode *dvp</var>, <var class="Fa" style="white-space: nowrap;">struct - componentname *cnp</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_GETPAGES</code>(<var class="Fa" style="white-space: nowrap;">struct - vnode *vp</var>, <var class="Fa" style="white-space: nowrap;">voff_t - offset</var>, <var class="Fa" style="white-space: nowrap;">struct vm_page - **m</var>, <var class="Fa" style="white-space: nowrap;">int *count</var>, - <var class="Fa" style="white-space: nowrap;">int centeridx</var>, - <var class="Fa" style="white-space: nowrap;">vm_prot_t access_type</var>, - <var class="Fa" style="white-space: nowrap;">int advice</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_PUTPAGES</code>(<var class="Fa" style="white-space: nowrap;">struct - vnode *vp</var>, <var class="Fa" style="white-space: nowrap;">voff_t - offlo</var>, <var class="Fa" style="white-space: nowrap;">voff_t - offhi</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_STRATEGY</code>(<var class="Fa" style="white-space: nowrap;">struct - vnode *vp</var>, <var class="Fa" style="white-space: nowrap;">struct buf - *bp</var>);</p> -<p class="Pp"><var class="Ft">int</var> - <br/> - <code class="Fn">VOP_BWRITE</code>(<var class="Fa" style="white-space: nowrap;">struct - vnode *vp</var>, <var class="Fa" style="white-space: nowrap;">struct buf - *bp</var>);</p> -<p class="Pp"><var class="Ft">int</var> - <br/> - <code class="Fn">VOP_GETEXTATTR</code>(<var class="Fa" style="white-space: nowrap;">struct - vnode *vp</var>, <var class="Fa" style="white-space: nowrap;">int - attrnamespace</var>, <var class="Fa" style="white-space: nowrap;">const char - *name</var>, <var class="Fa" style="white-space: nowrap;">struct uio - *uio</var>, <var class="Fa" style="white-space: nowrap;">size_t *size</var>, - <var class="Fa" style="white-space: nowrap;">kauth_cred_t cred</var>);</p> -<p class="Pp"><var class="Ft">int</var> - <br/> - <code class="Fn">VOP_SETEXTATTR</code>(<var class="Fa" style="white-space: nowrap;">struct - vnode *vp</var>, <var class="Fa" style="white-space: nowrap;">int - attrnamespace</var>, <var class="Fa" style="white-space: nowrap;">const char - *name</var>, <var class="Fa" style="white-space: nowrap;">struct uio - *uio</var>, <var class="Fa" style="white-space: nowrap;">kauth_cred_t - cred</var>);</p> -<p class="Pp"><var class="Ft">int</var> - <br/> - <code class="Fn">VOP_LISTEXTATTR</code>(<var class="Fa" style="white-space: nowrap;">struct - vnode *vp</var>, <var class="Fa" style="white-space: nowrap;">int - attrnamespace</var>, <var class="Fa" style="white-space: nowrap;">struct uio - *uio</var>, <var class="Fa" style="white-space: nowrap;">size_t *size</var>, - <var class="Fa" style="white-space: nowrap;">kauth_cred_t cred</var>);</p> -<p class="Pp"><var class="Ft">int</var> - <br/> - <code class="Fn">VOP_DELETEEXTATTR</code>(<var class="Fa" style="white-space: nowrap;">struct - vnode *vp</var>, <var class="Fa" style="white-space: nowrap;">int - attrnamespace</var>, <var class="Fa" style="white-space: nowrap;">const char - *name</var>, <var class="Fa" style="white-space: nowrap;">kauth_cred_t - cred</var>);</p> -<p class="Pp">Not all header files are required for each function.</p> -</section> -<section class="Sh"> -<h1 class="Sh" id="DESCRIPTION"><a class="permalink" href="#DESCRIPTION">DESCRIPTION</a></h1> -<p class="Pp">The vnode operations vector describes what operations can be done - to the file associated with the vnode. The system maintains one vnode - operations vector for each file system type configured into the kernel. The - vnode operations vector contains a pointer to a function for each operation - supported by the file system. Many of the functions described in the vnode - operations vector are closely related to their corresponding system calls. - In most cases, they are called as a result of the system call associated - with the operation being invoked.</p> -<p class="Pp">Functions in the vnode operations vector are invoked using - specialized macros. The following table gives a summary of the - operations.</p> -<p class="Pp"></p> -<table class="Bl-column Bl-compact"> - <tr id="Macro"> - <td><a class="permalink" href="#Macro"><b class="Sy">Macro</b></a></td> - <td><a class="permalink" href="#Description"><b class="Sy" id="Description">Description</b></a></td> - </tr> - <tr> - <td>VOP_LOOKUP</td> - <td>Lookup file name in name cache</td> - </tr> - <tr> - <td>VOP_CREATE</td> - <td>Create a new file</td> - </tr> - <tr> - <td>VOP_MKNOD</td> - <td>Make a new device</td> - </tr> - <tr> - <td>VOP_OPEN</td> - <td>Open a file</td> - </tr> - <tr> - <td>VOP_CLOSE</td> - <td>Close a file</td> - </tr> - <tr> - <td>VOP_ACCESS</td> - <td>Determine file accessibility</td> - </tr> - <tr> - <td>VOP_GETATTR</td> - <td>Get file attributes</td> - </tr> - <tr> - <td>VOP_SETATTR</td> - <td>Set file attributes</td> - </tr> - <tr> - <td>VOP_READ</td> - <td>Read from a file</td> - </tr> - <tr> - <td>VOP_WRITE</td> - <td>Write to a file</td> - </tr> - <tr> - <td>VOP_FALLOCATE</td> - <td>Allocate backing for a file</td> - </tr> - <tr> - <td>VOP_FDISCARD</td> - <td>Discard backing for a file</td> - </tr> - <tr> - <td>VOP_IOCTL</td> - <td>Perform device-specific I/O</td> - </tr> - <tr> - <td>VOP_FCNTL</td> - <td>Perform file control</td> - </tr> - <tr> - <td>VOP_POLL</td> - <td>Test if poll event has occurred</td> - </tr> - <tr> - <td>VOP_KQFILTER</td> - <td>Register a knote</td> - </tr> - <tr> - <td>VOP_REVOKE</td> - <td>Eliminate vnode activity</td> - </tr> - <tr> - <td>VOP_MMAP</td> - <td>Map file into user address space</td> - </tr> - <tr> - <td>VOP_FSYNC</td> - <td>Flush pending data to disk</td> - </tr> - <tr> - <td>VOP_SEEK</td> - <td>Test if file is seekable</td> - </tr> - <tr> - <td>VOP_REMOVE</td> - <td>Remove a file</td> - </tr> - <tr> - <td>VOP_LINK</td> - <td>Link a file</td> - </tr> - <tr> - <td>VOP_RENAME</td> - <td>Rename a file</td> - </tr> - <tr> - <td>VOP_MKDIR</td> - <td>Make a new directory</td> - </tr> - <tr> - <td>VOP_RMDIR</td> - <td>Remove a directory</td> - </tr> - <tr> - <td>VOP_SYMLINK</td> - <td>Create a symbolic link</td> - </tr> - <tr> - <td>VOP_READDIR</td> - <td>Read directory entry</td> - </tr> - <tr> - <td>VOP_READLINK</td> - <td>Read contents of a symlink</td> - </tr> - <tr> - <td>VOP_ABORTOP</td> - <td>Abort pending operation</td> - </tr> - <tr> - <td>VOP_INACTIVE</td> - <td>Release the inactive vnode</td> - </tr> - <tr> - <td>VOP_RECLAIM</td> - <td>Reclaim vnode for another file</td> - </tr> - <tr> - <td>VOP_LOCK</td> - <td>Sleep until vnode lock is free</td> - </tr> - <tr> - <td>VOP_UNLOCK</td> - <td>Wake up process sleeping on lock</td> - </tr> - <tr> - <td>VOP_ISLOCKED</td> - <td>Test if vnode is locked</td> - </tr> - <tr> - <td>VOP_BMAP</td> - <td>Logical block number conversion</td> - </tr> - <tr> - <td>VOP_PRINT</td> - <td>Print debugging information</td> - </tr> - <tr> - <td>VOP_PATHCONF</td> - <td>Return POSIX pathconf data</td> - </tr> - <tr> - <td>VOP_ADVLOCK</td> - <td>Advisory record locking</td> - </tr> - <tr> - <td>VOP_WHITEOUT</td> - <td>Whiteout vnode</td> - </tr> - <tr> - <td>VOP_GETPAGES</td> - <td>Read VM pages from file</td> - </tr> - <tr> - <td>VOP_PUTPAGES</td> - <td>Write VM pages to file</td> - </tr> - <tr> - <td>VOP_STRATEGY</td> - <td>Read/write a file system buffer</td> - </tr> - <tr> - <td>VOP_BWRITE</td> - <td>Write a file system buffer</td> - </tr> - <tr> - <td>VOP_GETEXTATTR</td> - <td>Get extended attribute</td> - </tr> - <tr> - <td>VOP_SETEXTATTR</td> - <td>Set extended attribute</td> - </tr> - <tr> - <td>VOP_LISTEXTATTR</td> - <td>List extended attributes</td> - </tr> - <tr> - <td>VOP_DELETEEXTATTR</td> - <td>Remove extended attribute</td> - </tr> -</table> -<p class="Pp">The implementation details of the vnode operations vector are not - quite what is described here.</p> -<p class="Pp">If the file system type does not support a specific operation, it - must nevertheless assign an appropriate stub in the vnode operations vector - to do the minimum required of it. In most cases, such functions either do - nothing or return an error value to the effect that it is not supported.</p> -<p class="Pp">Many of the functions in the vnode operations vector take a - componentname structure. It is used to encapsulate many parameters into a - single function argument. It has the following structure:</p> -<div class="Bd Pp Li"> -<pre>struct componentname { - /* - * Arguments to lookup. - */ - uint32_t cn_nameiop; /* namei operation */ - uint32_t cn_flags; /* flags to namei */ - kauth_cred_t cn_cred; /* credentials */ - /* - * Shared between lookup and commit routines. - */ - const char *cn_nameptr; /* pointer to looked up name */ - size_t cn_namelen; /* length of looked up component */ - size_t cn_consume; /* chars to consume in lookup() */ -};</pre> -</div> -<p class="Pp" id="VOP_LOOKUP">The top half of the structure is used exclusively - for the pathname lookups using - <a class="permalink" href="#VOP_LOOKUP"><code class="Fn">VOP_LOOKUP</code></a>() - and is initialized by the caller. The semantics of the lookup are affected - by the lookup operation specified in - <a class="permalink" href="#cn_nameiop"><i class="Em" id="cn_nameiop">cn_nameiop</i></a> - and the flags specified in - <a class="permalink" href="#cn_flags"><i class="Em" id="cn_flags">cn_flags</i></a>. - Valid operations are:</p> -<p class="Pp"></p> -<div class="Bd-indent"> -<dl class="Bl-tag Bl-compact"> - <dt>LOOKUP</dt> - <dd>perform name lookup only</dd> - <dt>CREATE</dt> - <dd>set up for file creation</dd> - <dt>DELETE</dt> - <dd>set up for file deletion</dd> - <dt>RENAME</dt> - <dd>set up for file renaming</dd> - <dt>OPMASK</dt> - <dd>mask for operation</dd> -</dl> -</div> -<p class="Pp" id="cn-_cn_flags">Valid values for - <a class="permalink" href="#cn-_cn_flags"><i class="Em">cn->cn_flags</i></a> - are:</p> -<p class="Pp"></p> -<div class="Bd-indent"> -<dl class="Bl-tag Bl-compact"> - <dt>LOCKLEAF</dt> - <dd>lock inode on return</dd> - <dt>LOCKPARENT</dt> - <dd>want parent vnode returned locked</dd> - <dt>NOCACHE</dt> - <dd>name must not be left in name cache (see - <a class="Xr">namecache(9)</a>)</dd> - <dt>FOLLOW</dt> - <dd>follow symbolic links</dd> - <dt>NOFOLLOW</dt> - <dd>do not follow symbolic links (pseudo)</dd> - <dt>MODMASK</dt> - <dd>mask of operational modifiers</dd> -</dl> -</div> -<p class="Pp">No vnode operations may be called from interrupt context. Most - operations also require the vnode to be locked on entry. To prevent - deadlocks, when acquiring locks on multiple vnodes, the lock of parent - directory must be acquired before the lock on the child directory.</p> -<p class="Pp">Vnode operations for a file system type generally should not be - called directly from the kernel, but accessed indirectly through the - high-level convenience functions discussed in - <a class="Xr">vnsubr(9)</a>.</p> -</section> -<section class="Sh"> -<h1 class="Sh" id="FUNCTIONS"><a class="permalink" href="#FUNCTIONS">FUNCTIONS</a></h1> -<dl class="Bl-tag"> - <dt id="VOP_LOOKUP~2"><a class="permalink" href="#VOP_LOOKUP~2"><code class="Fn">VOP_LOOKUP</code></a>(<var class="Fa">dvp</var>, - <var class="Fa">vpp</var>, <var class="Fa">cnp</var>)</dt> - <dd>Lookup a single pathname component in a given directory. The argument - <var class="Fa">dvp</var> is the locked vnode of the directory to search - and <var class="Fa">cnp</var> is the pathname component to be searched - for. If the pathname component is found, the address of the resulting - unlocked vnode is returned in <var class="Fa">vpp</var>. The operation - specified in - <a class="permalink" href="#cnp-_cn_nameiop"><i class="Em" id="cnp-_cn_nameiop">cnp->cn_nameiop</i></a> - indicates <code class="Fn">VOP_LOOKUP</code>() the reason for requesting - the lookup and uses it to cache file system type specific information in - the vnode for subsequent operations. - <p class="Pp" id="VOP_LOOKUP~3">There are three types of lookups: - ".", ".." (ISDOTDOT), and regular. If the pathname - component being searched for is ".", then - <var class="Fa">dvp</var> has an extra reference added to it and it is - returned in <var class="Fa">*vpp</var>. For other pathname components, - <a class="permalink" href="#VOP_LOOKUP~3"><code class="Fn">VOP_LOOKUP</code></a>() - checks the accessibility of the directory and searches the name cache - for the pathname component. See <a class="Xr">namecache(9)</a>. If the - pathname is not found in the name cache, the directory is searched for - the pathname. The resulting unlocked vnode is returned in - <var class="Fa">vpp</var>. <var class="Fa">dvp</var> is always returned - locked.</p> - <p class="Pp">On failure <var class="Fa">*vpp</var> is - <code class="Dv">NULL</code>, and <var class="Fa">*dvp</var> is left - locked. If the operation is successful <var class="Fa">*vpp</var> is - unlocked and zero is returned. Typically, if <var class="Fa">*vpp</var> - and <var class="Fa">dvp</var> are the same vnode the caller will need to - release twice (decrement the reference count) and unlock once.</p> - </dd> - <dt id="VOP_CREATE"><a class="permalink" href="#VOP_CREATE"><code class="Fn">VOP_CREATE</code></a>(<var class="Fa">dvp</var>, - <var class="Fa">vpp</var>, <var class="Fa">cnp</var>, - <var class="Fa">vap</var>)</dt> - <dd>Create a new file in a given directory. The argument - <var class="Fa">dvp</var> is the locked vnode of the directory to create - the new file in and <var class="Fa">cnp</var> is the pathname component of - the new file. The argument <var class="Fa">vap</var> specifies the - attributes that the new file should be created with. If the file is - successfully created, the address of the resulting unlocked vnode is - returned in <var class="Fa">vpp</var> and zero is returned. - <p class="Pp" id="VOP_LOOKUP~4">This function is called after - <a class="permalink" href="#VOP_LOOKUP~4"><code class="Fn">VOP_LOOKUP</code></a>() - when a file is being created. Normally, - <code class="Fn">VOP_LOOKUP</code>() will have set the SAVENAME flag in - <i class="Em">cnp->cn_flags</i> to keep the memory pointed to by - <i class="Em">cnp->cn_pnbuf</i> valid. If an error is detected when - creating the file, this memory is released. If the file is created - successfully it will be released unless the SAVESTART flags in specified - in <i class="Em">cnp->cn_flags</i>.</p> - </dd> - <dt id="VOP_MKNOD"><a class="permalink" href="#VOP_MKNOD"><code class="Fn">VOP_MKNOD</code></a>(<var class="Fa">dvp</var>, - <var class="Fa">vpp</var>, <var class="Fa">cnp</var>, - <var class="Fa">vap</var>)</dt> - <dd>Make a new device-special file in a given directory. The argument - <var class="Fa">dvp</var> is the locked vnode of the directory to create - the new device-special file in and <var class="Fa">cnp</var> is the - pathname component of the new device-special file. The argument - <var class="Fa">vap</var> specifies the attributes that the new - device-special file should be created with. If the file is successfully - created, the address of the resulting unlocked vnode is returned in - <var class="Fa">vpp</var> and zero is returned. - <p class="Pp" id="VOP_LOOKUP~5">This function is called after - <a class="permalink" href="#VOP_LOOKUP~5"><code class="Fn">VOP_LOOKUP</code></a>() - when a device-special file is being created. Normally, - <code class="Fn">VOP_LOOKUP</code>() will have set the SAVENAME flag in - <i class="Em">cnp->cn_flags</i> to keep the memory pointed to by - <i class="Em">cnp->cn_pnbuf</i> valid. If an error is detected when - creating the device-special file, this memory is released. If the - device-special file is created successfully it will be released unless - the SAVESTART flags in specified in - <i class="Em">cnp->cn_flags</i>.</p> - </dd> - <dt><code class="Fn">VOP_OPEN</code>(<var class="Fa">vp</var>, - <var class="Fa">mode</var>, <var class="Fa">cred</var>)</dt> - <dd>Open a file. The argument <var class="Fa">vp</var> is the vnode of the - file to open and <var class="Fa">mode</var> specifies the access mode - required by the calling process. The calling credentials are specified by - <var class="Fa">cred</var>. The access mode is a set of flags, including - FREAD, FWRITE, O_NONBLOCK, O_APPEND, etc. - <code class="Fn">VOP_OPEN</code>() must be called before a file can be - accessed by a thread. The vnode reference count is incremented. - <p class="Pp" id="VOP_OPEN"><a class="permalink" href="#VOP_OPEN"><code class="Fn">VOP_OPEN</code></a>() - expects the vnode <var class="Fa">vp</var> to be locked on entry and - will leave it locked on return. If the operation is successful zero is - returned, otherwise an appropriate error code is returned.</p> - </dd> - <dt id="VOP_CLOSE"><a class="permalink" href="#VOP_CLOSE"><code class="Fn">VOP_CLOSE</code></a>(<var class="Fa">vp</var>, - <var class="Fa">fflag</var>, <var class="Fa">cred</var>)</dt> - <dd>Close a file. The argument <var class="Fa">vp</var> is the vnode of the - file to close and <var class="Fa">fflag</var> specifies the access mode by - the calling process. The possible flags are <code class="Dv">FREAD</code>, - <code class="Dv">FWRITE</code> and <code class="Dv">FNONBLOCK</code>. The - calling credentials are specified by <var class="Fa">cred</var>. - <code class="Fn">VOP_CLOSE</code>() frees resources allocated by - <code class="Fn">VOP_OPEN</code>(). - <p class="Pp">The vnode <var class="Fa">vp</var> will be locked on entry and - should remain locked on return.</p> - </dd> - <dt id="VOP_ACCESS"><a class="permalink" href="#VOP_ACCESS"><code class="Fn">VOP_ACCESS</code></a>(<var class="Fa">vp</var>, - <var class="Fa">mode</var>, <var class="Fa">cred</var>)</dt> - <dd>Determine the accessibility (permissions) of the file against the - specified credentials. The argument <var class="Fa">vp</var> is the vnode - of the file to check, <var class="Fa">mode</var> is the type of access - required and <var class="Fa">cred</var> contains the user credentials to - check. The argument <var class="Fa">mode</var> is a mask which can contain - VREAD, VWRITE or VEXEC. If the file is accessible in the specified way, - zero is returned, otherwise an appropriate error code is returned. - <p class="Pp">The vnode <var class="Fa">vp</var> will be locked on entry and - should remain locked on return.</p> - </dd> - <dt id="VOP_GETATTR"><a class="permalink" href="#VOP_GETATTR"><code class="Fn">VOP_GETATTR</code></a>(<var class="Fa">vp</var>, - <var class="Fa">vap</var>, <var class="Fa">cred</var>)</dt> - <dd>Get specific vnode attributes on a file. The argument - <var class="Fa">vp</var> is the vnode of the file to get the attributes - for. The argument <var class="Fa">cred</var> specifies the calling - credentials. <code class="Fn">VOP_GETATTR</code>() uses the file system - type specific data object <i class="Em">vp->v_data</i> to reference the - underlying file attributes. The attributes are returned in - <var class="Fa">vap</var>. Attributes which are not available are set to - the value VNOVAL. - <p class="Pp" id="VOP_GETATTR~2">For more information on vnode attributes - see <a class="Xr">vattr(9)</a>. Historically it was considered - acceptable to call - <a class="permalink" href="#VOP_GETATTR~2"><code class="Fn">VOP_GETATTR</code></a>() - without first locking the vnode. This usage is deprecated.</p> - <p class="Pp">The vnode <var class="Fa">vp</var> will be locked on entry and - should remain locked on return.</p> - </dd> - <dt id="VOP_SETATTR"><a class="permalink" href="#VOP_SETATTR"><code class="Fn">VOP_SETATTR</code></a>(<var class="Fa">vp</var>, - <var class="Fa">vap</var>, <var class="Fa">cred</var>)</dt> - <dd>Set specific vnode attributes on a file. The argument - <var class="Fa">vp</var> is the locked vnode of the file to set the - attributes for. The argument <var class="Fa">cred</var> specifies the - calling credentials. <code class="Fn">VOP_SETATTR</code>() uses the file - system type specific data object <i class="Em">vp->v_data</i> to - reference the underlying file attributes. The new attributes are defined - in <var class="Fa">vap</var>. Attributes which are not being modified by - <code class="Fn">VOP_SETATTR</code>() should be set to the value VNOVAL. - If the operation is successful zero is returned, otherwise an appropriate - error is returned. - <p class="Pp">For more information on vnode attributes see - <a class="Xr">vattr(9)</a>.</p> - </dd> - <dt id="VOP_READ"><a class="permalink" href="#VOP_READ"><code class="Fn">VOP_READ</code></a>(<var class="Fa">vp</var>, - <var class="Fa">uio</var>, <var class="Fa">ioflag</var>, - <var class="Fa">cred</var>)</dt> - <dd>Read the contents of a file. The argument <var class="Fa">vp</var> is the - vnode of the file to read from, <var class="Fa">uio</var> is the location - to read the data into, <var class="Fa">ioflag</var> is a set of flags and - <var class="Fa">cred</var> are the credentials of the calling process. - <p class="Pp">The <var class="Fa">ioflag</var> argument is used to give - directives and hints to the file system. When attempting a read, the - high 16 bits are used to provide a read-ahead hint (in unit of file - system blocks) that the file system should attempt. The low 16 bits are - a bit mask which can contain the following flags:</p> - <p class="Pp"></p> - <div class="Bd-indent"> - <dl class="Bl-tag Bl-compact"> - <dt>IO_UNIT</dt> - <dd>do I/O as atomic unit</dd> - <dt>IO_APPEND</dt> - <dd>append write to end</dd> - <dt>IO_SYNC</dt> - <dd>sync I/O file integrity completion</dd> - <dt>IO_NODELOCKED</dt> - <dd>underlying node already locked</dd> - <dt>IO_NDELAY</dt> - <dd>FNDELAY flag set in file table</dd> - <dt>IO_DSYNC</dt> - <dd>sync I/O data integrity completion</dd> - <dt>IO_ALTSEMANTICS</dt> - <dd>use alternate I/O semantics</dd> - <dt>IO_NORMAL</dt> - <dd>operate on regular data</dd> - <dt>IO_EXT</dt> - <dd>operate on extended attributes</dd> - <dt>IO_DIRECT</dt> - <dd>do not buffer data in the kernel</dd> - </dl> - </div> - <p class="Pp">Zero is returned on success, otherwise an error is returned. - The vnode should be locked on entry and remains locked on exit.</p> - </dd> - <dt id="VOP_WRITE"><a class="permalink" href="#VOP_WRITE"><code class="Fn">VOP_WRITE</code></a>(<var class="Fa">vp</var>, - <var class="Fa">uio</var>, <var class="Fa">ioflag</var>, - <var class="Fa">cred</var>)</dt> - <dd>Write to a file. The argument <var class="Fa">vp</var> is the vnode of the - file to write to, <var class="Fa">uio</var> is the location of the data to - write, <var class="Fa">ioflag</var> is a set of flags and - <var class="Fa">cred</var> are the credentials of the calling process. - <p class="Pp" id="VOP_READ~2">The <var class="Fa">ioflag</var> argument is - used to give directives and hints to the file system. The low 16 bits - are a bit mask which can contain the same flags as - <a class="permalink" href="#VOP_READ~2"><code class="Fn">VOP_READ</code></a>().</p> - <p class="Pp">Zero is returned on success, otherwise an error is returned. - The vnode should be locked on entry and remains locked on exit.</p> - </dd> - <dt id="VOP_FALLOCATE"><a class="permalink" href="#VOP_FALLOCATE"><code class="Fn">VOP_FALLOCATE</code></a>(<var class="Fa">vp</var>, - <var class="Fa">pos</var>, <var class="Fa">len</var>)</dt> - <dd>Allocate backing store. The argument <var class="Fa">vp</var> is the vnode - for the file. The <var class="Fa">pos</var> and <var class="Fa">len</var> - arguments (specified in bytes) name an extent within the file. The blocks - underlying this range, rounding up at the top and down at the bottom if - needed, are checked; if no physical storage is allocated, a physical block - is allocated and zeroed. This operation removes “holes” from - files.</dd> - <dt id="VOP_FDISCARD"><a class="permalink" href="#VOP_FDISCARD"><code class="Fn">VOP_FDISCARD</code></a>(<var class="Fa">vp</var>, - <var class="Fa">pos</var>, <var class="Fa">len</var>)</dt> - <dd>Discard backing store. The argument <var class="Fa">vp</var> is the vnode - for the file. The <var class="Fa">pos</var> and <var class="Fa">len</var> - arguments (specified in bytes) name an extent within the file. The blocks - underlying this range, rounding down at the top and up at the bottom if - needed, are checked. If any physical storage is used, it is deallocated. - This operation creates “holes” in files. Discarded blocks of - regular files read back afterwards as zeroes. On devices, the underlying - discard-block operation if any (e.g. ATA TRIM) is issued. The device - handles this as it sees fit. In particular it is - <a class="permalink" href="#not"><i class="Em" id="not">not</i></a> - guaranteed that discarded blocks on devices will be zeroed; reading a - discarded block might produce zeros, or ones, or the previously existing - data, or some other data, or trash.</dd> - <dt><code class="Fn">VOP_IOCTL</code>(<var class="Fa">vp</var>, - <var class="Fa">command</var>, <var class="Fa">data</var>, - <var class="Fa">fflag</var>, <var class="Fa">cred</var>)</dt> - <dd>Perform device-specific I/O. The argument <var class="Fa">vp</var> is the - vnode of the file, normally representing a device. The argument - <var class="Fa">command</var> specifies the device-specific operation to - perform and <var class="Fa">cnp</var> provides extra data for the - specified operation. The argument <var class="Fa">fflags</var> is a set of - flags. The argument <var class="Fa">cred</var> is the caller's - credentials. If the operation is successful, zero is returned, otherwise - an appropriate error code is returned. - <p class="Pp" id="VOP_IOCTL">Most file systems do not supply a function for - <a class="permalink" href="#VOP_IOCTL"><code class="Fn">VOP_IOCTL</code></a>(). - This function implements the <a class="Xr">ioctl(2)</a> system call.</p> - </dd> - <dt id="VOP_FCNTL"><a class="permalink" href="#VOP_FCNTL"><code class="Fn">VOP_FCNTL</code></a>(<var class="Fa">vp</var>, - <var class="Fa">command</var>, <var class="Fa">data</var>, - <var class="Fa">fflag</var>, <var class="Fa">cred</var>)</dt> - <dd>Perform file control. The argument <var class="Fa">vp</var> is the locked - vnode of the file. The argument <var class="Fa">command</var> specifies - the operation to perform and <var class="Fa">cnp</var> provides extra data - for the specified operation. The argument <var class="Fa">fflags</var> is - a set of flags. The argument <var class="Fa">cred</var> is the caller's - credentials. If the operation is successful, zero is returned, otherwise - an appropriate error code is returned.</dd> - <dt id="VOP_POLL"><a class="permalink" href="#VOP_POLL"><code class="Fn">VOP_POLL</code></a>(<var class="Fa">vp</var>, - <var class="Fa">events</var>)</dt> - <dd>Test if a poll event has occurred. The argument <var class="Fa">vp</var> - is the vnode of the file to poll. It returns any events of interest as - specified by <var class="Fa">events</var> that may have occurred for the - file. The argument <var class="Fa">events</var> is a set of flags as - specified by <a class="Xr">poll(2)</a>. - <p class="Pp">The vnode <var class="Fa">vp</var> remains unlocked throughout - the whole operation.</p> - </dd> - <dt id="VOP_KQFILTER"><a class="permalink" href="#VOP_KQFILTER"><code class="Fn">VOP_KQFILTER</code></a>(<var class="Fa">vp</var>, - <var class="Fa">kn</var>)</dt> - <dd>Register a knote <var class="Fa">kn</var> with the vnode - <var class="Fa">vn</var>. If the operation is successful zero is returned, - otherwise an appropriate error code is returned. - <p class="Pp">The vnode <var class="Fa">vp</var> remains unlocked throughout - the whole operation.</p> - </dd> - <dt id="VOP_REVOKE"><a class="permalink" href="#VOP_REVOKE"><code class="Fn">VOP_REVOKE</code></a>(<var class="Fa">vp</var>, - <var class="Fa">flags</var>)</dt> - <dd>Eliminate all activity associated with the vnode <var class="Fa">vp</var>. - The argument <var class="Fa">flags</var> is a set of flags. If REVOKEALL - is set in <var class="Fa">flags</var> all vnodes aliased to the vnode - <var class="Fa">vp</var> are also eliminated. If the operation is - successful zero is returned, otherwise an appropriate error is returned. - <p class="Pp">The vnode <var class="Fa">vp</var> remains unlocked throughout - the whole operation.</p> - </dd> - <dt id="VOP_MMAP"><a class="permalink" href="#VOP_MMAP"><code class="Fn">VOP_MMAP</code></a>(<var class="Fa">vp</var>, - <var class="Fa">prot</var>, <var class="Fa">cred</var>)</dt> - <dd>Inform file system that <var class="Fa">vp</var> is in the process of - being memory mapped. The argument <var class="Fa">prot</var> specifies the - vm access protection the vnode is going to be mapped with. The argument - <var class="Fa">cred</var> is the caller's credentials. If the file system - allows the memory mapping, zero is returned, otherwise an appropriate - error code is returned. - <p class="Pp" id="VOP_MMAP~2">Most file systems do not supply a function for - <a class="permalink" href="#VOP_MMAP~2"><code class="Fn">VOP_MMAP</code></a>() - and use - <a class="permalink" href="#genfs_mmap"><code class="Fn" id="genfs_mmap">genfs_mmap</code></a>() - to default for success. Only file systems which do not integrate with - the page cache at all typically want to disallow memory mapping.</p> - </dd> - <dt id="VOP_FSYNC"><a class="permalink" href="#VOP_FSYNC"><code class="Fn">VOP_FSYNC</code></a>(<var class="Fa">vp</var>, - <var class="Fa">cred</var>, <var class="Fa">flags</var>, - <var class="Fa">offlo</var>, <var class="Fa">offhi</var>)</dt> - <dd>Flush pending data buffers for a file to disk. The argument - <var class="Fa">vp</var> is the locked vnode of the file for flush. The - argument <var class="Fa">cred</var> is the caller's credentials. The - argument <var class="Fa">flags</var> is a set of flags. If FSYNC_WAIT is - specified in <var class="Fa">flags</var>, the function should wait for I/O - to complete before returning. The argument <var class="Fa">offlo</var> and - <var class="Fa">offhi</var> specify the range of file to flush. If the - operation is successful zero is returned, otherwise an appropriate error - code is returned. - <p class="Pp">This function implements the <a class="Xr">sync(2)</a> and - <a class="Xr">fsync(2)</a> system calls.</p> - </dd> - <dt id="VOP_SEEK"><a class="permalink" href="#VOP_SEEK"><code class="Fn">VOP_SEEK</code></a>(<var class="Fa">vp</var>, - <var class="Fa">oldoff</var>, <var class="Fa">newoff</var>, - <var class="Fa">cred</var>)</dt> - <dd>Test if the file is seekable for the specified offset - <var class="Fa">newoff</var>. The argument <var class="Fa">vp</var> is the - locked vnode of the file to test. For most file systems this function - simply tests if <var class="Fa">newoff</var> is valid. If the specified - <var class="Fa">newoff</var> is less than zero, the function returns error - code EINVAL.</dd> - <dt id="VOP_REMOVE"><a class="permalink" href="#VOP_REMOVE"><code class="Fn">VOP_REMOVE</code></a>(<var class="Fa">dvp</var>, - <var class="Fa">vp</var>, <var class="Fa">cnp</var>)</dt> - <dd>Remove a file. The argument <var class="Fa">dvp</var> is the locked vnode - of the directory to remove the file from and <var class="Fa">vp</var> is - the locked vnode of the file to remove. The argument - <var class="Fa">cnp</var> is the pathname component about the file to - remove. If the operation is successful zero is returned, otherwise an - appropriate error code is returned. Both <var class="Fa">dvp</var> and - <var class="Fa">vp</var> are locked on entry and are to be unlocked before - returning.</dd> - <dt id="VOP_LINK"><a class="permalink" href="#VOP_LINK"><code class="Fn">VOP_LINK</code></a>(<var class="Fa">dvp</var>, - <var class="Fa">vp</var>, <var class="Fa">cnp</var>)</dt> - <dd>Link to a file. The argument <var class="Fa">dvp</var> is the locked node - of the directory to create the new link and <var class="Fa">vp</var> is - the vnode of the file to be linked. The argument <var class="Fa">cnp</var> - is the pathname component of the new link. If the operation is successful - zero is returned, otherwise an error code is returned. The directory vnode - <var class="Fa">dvp</var> should be locked on entry and will be released - and unlocked on return. The vnode <var class="Fa">vp</var> should not be - locked on entry and will remain unlocked on return.</dd> - <dt><code class="Fn">VOP_RENAME</code>(<var class="Fa">fdvp</var>, - <var class="Fa">fvp</var>, <var class="Fa">fcnp</var>, - <var class="Fa">tdvp</var>, <var class="Fa">tvp</var>, - <var class="Fa">tcnp</var>)</dt> - <dd>Rename a file. The argument <var class="Fa">fdvp</var> is the vnode of the - old parent directory containing in the file to be renamed and - <var class="Fa">fvp</var> is the vnode of the file to be renamed. The - argument <var class="Fa">fcnp</var> is the pathname component about the - file to be renamed. The argument <var class="Fa">tdvp</var> is the vnode - of the new directory of the target file and <var class="Fa">tvp</var> is - the vnode of the target file (if it exists). The argument - <var class="Fa">tcnp</var> is the pathname component about the file's new - name. If the operation is successful zero is returned, otherwise an error - code is returned. - <p class="Pp" id="VOP_RENAME">The caller must hold the target file system's - rename lock. The source directory and file vnodes should be unlocked and - their reference counts should be incremented before entry. The target - directory and file vnodes should both be locked on entry. - <a class="permalink" href="#VOP_RENAME"><code class="Fn">VOP_RENAME</code></a>() - updates the reference counts prior to returning.</p> - <p class="Pp" id="VOP_RENAME~2">Because of the complexity and nastiness of - the interface, please do not write new code that calls - <a class="permalink" href="#VOP_RENAME~2"><code class="Fn">VOP_RENAME</code></a>() - directly until such time as ongoing cleanup work reaches a point where - the interface has been rendered halfway sane.</p> - </dd> - <dt id="VOP_MKDIR"><a class="permalink" href="#VOP_MKDIR"><code class="Fn">VOP_MKDIR</code></a>(<var class="Fa">dvp</var>, - <var class="Fa">vpp</var>, <var class="Fa">cnp</var>, - <var class="Fa">vap</var>)</dt> - <dd>Make a new directory in a given directory. The argument - <var class="Fa">dvp</var> is the locked vnode of the directory to create - the new directory in and <var class="Fa">cnp</var> is the pathname - component of the new directory. The argument <var class="Fa">vap</var> - specifies the attributes that the new directory should be created with. If - the file is successfully created, the address of the resulting unlocked - vnode is returned in <var class="Fa">vpp</var> and zero is returned. - <p class="Pp" id="VOP_LOOKUP~6">This function is called after - <a class="permalink" href="#VOP_LOOKUP~6"><code class="Fn">VOP_LOOKUP</code></a>() - when a directory is being created. Normally, - <code class="Fn">VOP_LOOKUP</code>() will have set the SAVENAME flag in - <i class="Em">cnp->cn_flags</i> to keep the memory pointed to by - <i class="Em">cnp->cn_pnbuf</i> valid. If an error is detected when - creating the directory, this memory is released. If the directory is - created successfully it will be released unless the SAVESTART flags in - specified in <i class="Em">cnp->cn_flags</i>.</p> - </dd> - <dt id="VOP_RMDIR"><a class="permalink" href="#VOP_RMDIR"><code class="Fn">VOP_RMDIR</code></a>(<var class="Fa">dvp</var>, - <var class="Fa">vp</var>, <var class="Fa">cnp</var>)</dt> - <dd>Remove a directory in a given directory. The argument - <var class="Fa">dvp</var> is the locked vnode of the directory to remove - the directory from and <var class="Fa">vp</var> is the locked vnode of the - directory to remove. The argument <var class="Fa">cnp</var> is the - pathname component of the directory. Zero is returned on success, - otherwise an error code is returned. Both <var class="Fa">dvp</var> and - <var class="Fa">vp</var> should be locked on entry and will be released - and unlocked on return.</dd> - <dt id="VOP_SYMLINK"><a class="permalink" href="#VOP_SYMLINK"><code class="Fn">VOP_SYMLINK</code></a>(<var class="Fa">dvp</var>, - <var class="Fa">vpp</var>, <var class="Fa">cnp</var>, - <var class="Fa">vap</var>, <var class="Fa">target</var>)</dt> - <dd>Create a symbolic link in a given directory. The argument - <var class="Fa">dvp</var> is the locked vnode of the directory to create - the symbolic link in and <var class="Fa">cnp</var> is the pathname - component of the symbolic link. The argument <var class="Fa">vap</var> - specifies the attributes that the symbolic link should be created with and - <var class="Fa">target</var> specifies the pathname of the target of the - symbolic link. If the symbolic link is successfully created, the address - of the resulting unlocked vnode is returned in <var class="Fa">vpp</var> - and zero is returned. - <p class="Pp" id="VOP_LOOKUP~7">This function is called after - <a class="permalink" href="#VOP_LOOKUP~7"><code class="Fn">VOP_LOOKUP</code></a>() - when a symbolic link is being created. Normally, - <code class="Fn">VOP_LOOKUP</code>() will have set the SAVENAME flag in - <i class="Em">cnp->cn_flags</i> to keep the memory pointed to by - <i class="Em">cnp->cn_pnbuf</i> valid. If an error is detected when - creating the symbolic link, this memory is released. If the symbolic - link is created successfully it will be released unless the SAVESTART - flags in specified in <i class="Em">cnp->cn_flags</i>.</p> - </dd> - <dt><code class="Fn">VOP_READDIR</code>(<var class="Fa">vp</var>, - <var class="Fa">uio</var>, <var class="Fa">cred</var>, - <var class="Fa">eofflag</var>, <var class="Fa">cookies</var>, - <var class="Fa">ncookies</var>)</dt> - <dd>Read directory entry. The argument <var class="Fa">vp</var> is the vnode - of the directory to read the contents of and <var class="Fa">uio</var> is - the destination location to read the contents into. The argument - <var class="Fa">cred</var> is the caller's credentials. The argument - <var class="Fa">eofflag</var> is the pointer to a flag which is set by - <code class="Fn">VOP_READDIR</code>() to indicate an end-of-file - condition. If <var class="Fa">eofflag</var> is - <code class="Dv">NULL</code>, the end-of-file condition is not returned. - The arguments <var class="Fa">cookies</var> and - <var class="Fa">ncookies</var> specify the addresses for the list and - number of directory seek cookies generated for NFS. Both - <var class="Fa">cookies</var> and <var class="Fa">ncookies</var> should be - <code class="Dv">NULL</code> if they aren't required to be returned by - <code class="Fn">VOP_READDIR</code>(). The directory contents are read - into struct dirent structures and <var class="Fa">uio->uio_offset</var> - is set to the offset of the next unread directory entry. This offset may - be used in a following invocation to continue a sequential read of the - directory contents. If the operation is successful zero is returned, - otherwise an appropriate error code is returned. - <p class="Pp">The directory should be locked on entry and will remain locked - on return.</p> - <p class="Pp">In case <var class="Fa">ncookies</var> and - <var class="Fa">cookies</var> are supplied, one cookie should be - returned per directory entry. The value of the cookie for each directory - entry should be the offset within the directory where the on-disk - version of the following directory entry starts. That is, for each - directory entry <var class="Fa">i</var>, the corresponding cookie should - refer to the offset of directory entry <var class="Fa">i + 1</var>.</p> - <p class="Pp" id="VOP_READDIR">Note that the <var class="Fa">cookies</var> - array must be allocated by the callee using the M_TEMP malloc type as - callers of - <a class="permalink" href="#VOP_READDIR"><code class="Fn">VOP_READDIR</code></a>() - must be able to free the allocation.</p> - </dd> - <dt id="VOP_READLINK"><a class="permalink" href="#VOP_READLINK"><code class="Fn">VOP_READLINK</code></a>(<var class="Fa">vp</var>, - <var class="Fa">uio</var>, <var class="Fa">cred</var>)</dt> - <dd>Read the contents of a symbolic link. The argument - <var class="Fa">vp</var> is the locked vnode of the symlink and - <var class="Fa">uio</var> is the destination location to read the contents - into. The argument <var class="Fa">cred</var> is the credentials of the - caller. If the operation is successful zero is returned, otherwise an - error code is returned. - <p class="Pp">The vnode should be locked on entry and will remain locked on - return.</p> - </dd> - <dt id="VOP_ABORTOP"><a class="permalink" href="#VOP_ABORTOP"><code class="Fn">VOP_ABORTOP</code></a>(<var class="Fa">dvp</var>, - <var class="Fa">cnp</var>)</dt> - <dd>Abort pending operation on vnode <var class="Fa">dvp</var> and free - resources allocated in <var class="Fa">cnp</var>. - <p class="Pp" id="genfs_abortop">This operation is rarely implemented in - file systems and - <a class="permalink" href="#genfs_abortop"><code class="Fn">genfs_abortop</code></a>() - is typically used instead.</p> - </dd> - <dt id="VOP_INACTIVE"><a class="permalink" href="#VOP_INACTIVE"><code class="Fn">VOP_INACTIVE</code></a>(<var class="Fa">vp</var>)</dt> - <dd>Release the inactive vnode. <code class="Fn">VOP_INACTIVE</code>() is - called when the kernel is no longer using the vnode. This may be because - the reference count reaches zero or it may be that the file system is - being forcibly unmounted while there are open files. It can be used to - reclaim space for open but deleted files. The argument - <var class="Fa">vp</var> is the locked vnode to be released. If the - operation is successful zero is returned, otherwise an appropriate error - code is returned. The vnode <var class="Fa">vp</var> must be locked on - entry, and will remain locked on return.</dd> - <dt id="VOP_RECLAIM"><a class="permalink" href="#VOP_RECLAIM"><code class="Fn">VOP_RECLAIM</code></a>(<var class="Fa">vp</var>)</dt> - <dd>Reclaim the vnode for another file system. - <code class="Fn">VOP_RECLAIM</code>() is called when a vnode is being - reused for a different file system. Any file system specific resources - associated with the vnode should be freed. The argument - <var class="Fa">vp</var> is the vnode to be reclaimed. If the operation is - successful zero is returned, otherwise an appropriate error code is - returned. The vnode <var class="Fa">vp</var> should be locked on entry, - and will be returned unlocked.</dd> - <dt id="VOP_LOCK"><a class="permalink" href="#VOP_LOCK"><code class="Fn">VOP_LOCK</code></a>(<var class="Fa">vp</var>, - <var class="Fa">flags</var>)</dt> - <dd>Sleep until vnode lock is free. The argument <var class="Fa">vp</var> is - the vnode of the file to be locked. The argument - <var class="Fa">flags</var> is <code class="Dv">LK_EXCLUSIVE</code> to - take the lock exclusively or <code class="Dv">LK_SHARED</code> to take a - shared lock. If <var class="Fa">flags</var> contains - <code class="Dv">LK_NOWAIT</code> and the lock is busy, the operation will - return immediately with an error code. If <var class="Fa">flags</var> - contains <code class="Dv">LK_RETRY</code> this is a hint the caller wants - the lock on dead vnodes too. If the operation is successful zero is - returned, otherwise an appropriate error code is returned. - <code class="Fn">VOP_LOCK</code>() is used to serialize access to the file - system such as to prevent two writes to the same file from happening at - the same time. Kernel code should use <a class="Xr">vn_lock(9)</a> to lock - a vnode rather than calling <code class="Fn">VOP_LOCK</code>() - directly.</dd> - <dt id="VOP_UNLOCK"><a class="permalink" href="#VOP_UNLOCK"><code class="Fn">VOP_UNLOCK</code></a>(<var class="Fa">vp</var>)</dt> - <dd>Wake up process sleeping on lock. The argument <var class="Fa">vp</var> is - the vnode of the file to be unlocked. If the operation is successful zero - is returned, otherwise an appropriate error code is returned. - <code class="Fn">VOP_UNLOCK</code>() is used to serialize access to the - file system such as to prevent two writes to the same file from happening - at the same time.</dd> - <dt id="VOP_ISLOCKED"><a class="permalink" href="#VOP_ISLOCKED"><code class="Fn">VOP_ISLOCKED</code></a>(<var class="Fa">vp</var>)</dt> - <dd>Test if the vnode <var class="Fa">vp</var> is locked. Possible return - values are <code class="Dv">LK_EXCLUSIVE</code>, - <code class="Dv">LK_SHARED</code> or 0 for lock held exclusively by the - calling thread, shared lock held by anyone or unlocked, respectively. - <p class="Pp">This function must never be used to make locking decisions at - run time: it is provided only for diagnostic purposes.</p> - </dd> - <dt id="VOP_BMAP"><a class="permalink" href="#VOP_BMAP"><code class="Fn">VOP_BMAP</code></a>(<var class="Fa">vp</var>, - <var class="Fa">bn</var>, <var class="Fa">vpp</var>, - <var class="Fa">bnp</var>, <var class="Fa">runp</var>)</dt> - <dd>Convert the logical block number <var class="Fa">bn</var> of a file - specified by vnode <var class="Fa">vp</var> to its physical block number - on the disk. The physical block is returned in <var class="Fa">bnp</var>. - In case the logical block is not allocated, -1 is used. - <p class="Pp">If <var class="Fa">vpp</var> is not - <code class="Dv">NULL</code>, the vnode of the device vnode for the file - system is returned in the address specified by - <var class="Fa">vpp</var>. If <var class="Fa">runp</var> is not - <code class="Dv">NULL</code>, the number of contiguous blocks starting - from the next block after the queried block will be returned in - <var class="Fa">runp</var>.</p> - </dd> - <dt id="VOP_PRINT"><a class="permalink" href="#VOP_PRINT"><code class="Fn">VOP_PRINT</code></a>(<var class="Fa">vp</var>)</dt> - <dd>Print debugging information. The argument <var class="Fa">vp</var> is the - vnode to print. If the operation is successful zero is returned, otherwise - an appropriate error code is returned.</dd> - <dt id="VOP_PATHCONF"><a class="permalink" href="#VOP_PATHCONF"><code class="Fn">VOP_PATHCONF</code></a>(<var class="Fa">vp</var>, - <var class="Fa">name</var>, <var class="Fa">retval</var>)</dt> - <dd>Implement POSIX <a class="Xr">pathconf(2)</a> and - <a class="Xr">fpathconf(2)</a> support. The argument - <var class="Fa">vp</var> is the locked vnode to get information about. The - argument <var class="Fa">name</var> specified the type of information to - return. The information is returned in the address specified by - <var class="Fa">retval</var>. Valid values for <var class="Fa">name</var> - are: - <p class="Pp"></p> - <div class="Bd-indent"> - <dl class="Bl-tag Bl-compact"> - <dt>_PC_LINK_MAX</dt> - <dd>return the maximum number of links to a file</dd> - <dt>_PC_NAME_MAX</dt> - <dd>return the maximum number of bytes in a file name</dd> - <dt>_PC_PATH_MAX</dt> - <dd>return the maximum number of bytes in a pathname</dd> - <dt>_PC_PIPE_BUF</dt> - <dd>return the maximum number of bytes which will be written atomically to - a pipe</dd> - <dt>_PC_CHOWN_RESTRICTED</dt> - <dd>return 1 if appropriate privileges are required for the - <a class="Xr">chown(2)</a> system call, otherwise zero</dd> - <dt>_PC_NO_TRUNC</dt> - <dd>return 0 if file names longer than {<code class="Dv">NAME_MAX</code>} - are silently truncated</dd> - </dl> - </div> - <p class="Pp">If <var class="Fa">name</var> is recognized, - <var class="Fa">*retval</var> is set to the specified value and zero is - returned, otherwise an appropriate error is returned.</p> - </dd> - <dt id="VOP_ADVLOCK"><a class="permalink" href="#VOP_ADVLOCK"><code class="Fn">VOP_ADVLOCK</code></a>(<var class="Fa">vp</var>, - <var class="Fa">id</var>, <var class="Fa">op</var>, - <var class="Fa">fl</var>, <var class="Fa">flags</var>)</dt> - <dd>Manipulate Advisory record locks on a vnode. The argument - <var class="Fa">vp</var> is the vnode on which locks are manipulated. The - argument <var class="Fa">id</var> is the id token which is changing the - lock and <var class="Fa">op</var> is the <a class="Xr">fcntl(2)</a> - operation to perform. Valid values are: - <p class="Pp"></p> - <div class="Bd-indent"> - <dl class="Bl-tag Bl-compact"> - <dt>F_SETLK</dt> - <dd>set lock</dd> - <dt>F_GETLK</dt> - <dd>get the first conflicted lock</dd> - <dt>F_UNLCK</dt> - <dd>clear lock</dd> - </dl> - </div> - <p class="Pp" id="VOP_ADVLOCK~2">The argument <var class="Fa">fl</var> is a - description of the lock. In the case of - <code class="Dv">SEEK_CUR</code>, The caller should add the current file - offset to fl->l_start beforehand. - <a class="permalink" href="#VOP_ADVLOCK~2"><code class="Fn">VOP_ADVLOCK</code></a>() - treats <code class="Dv">SEEK_CUR</code> as - <code class="Dv">SEEK_SET</code>.</p> - <p class="Pp">The argument <var class="Fa">flags</var> is the set of flags. - Valid values are:</p> - <p class="Pp"></p> - <div class="Bd-indent"> - <dl class="Bl-tag Bl-compact"> - <dt>F_WAIT</dt> - <dd>wait until lock is granted</dd> - <dt>F_FLOCK</dt> - <dd>use <a class="Xr">flock(2)</a> semantics for lock</dd> - <dt>F_POSIX</dt> - <dd>use POSIX semantics for lock</dd> - </dl> - </div> - <p class="Pp">If the operation is successful zero is returned, otherwise an - appropriate error is returned.</p> - </dd> - <dt id="VOP_WHITEOUT"><a class="permalink" href="#VOP_WHITEOUT"><code class="Fn">VOP_WHITEOUT</code></a>(<var class="Fa">dvp</var>, - <var class="Fa">cnp</var>, <var class="Fa">flags</var>)</dt> - <dd>Whiteout pathname component in directory with vnode - <var class="Fa">dvp</var>. The argument <var class="Fa">cnp</var> - specifies the pathname component to whiteout. - <p class="Pp">The vnode <var class="Fa">dvp</var> should be locked on entry - and will remain locked on return.</p> - </dd> - <dt id="VOP_GETPAGES"><a class="permalink" href="#VOP_GETPAGES"><code class="Fn">VOP_GETPAGES</code></a>(<var class="Fa">vp</var>, - <var class="Fa">offset</var>, <var class="Fa">m</var>, - <var class="Fa">count</var>, <var class="Fa">centeridx</var>, - <var class="Fa">access_type</var>, <var class="Fa">advice</var>, - <var class="Fa">flags</var>)</dt> - <dd>Read VM pages from file. The argument <var class="Fa">vp</var> is the - locked vnode to read the VM pages from. The argument - <var class="Fa">offset</var> is offset in the file to start accessing and - <var class="Fa">m</var> is an array of VM pages. The argument - <var class="Fa">count</var> points a variable that specifies the number of - pages to read. If the operation is successful zero is returned, otherwise - an appropriate error code is returned. If PGO_LOCKED is specified in - <a class="permalink" href="#flags"><i class="Em" id="flags">flags</i></a>, - <code class="Fn">VOP_GETPAGES</code>() might return less pages than - requested. In that case, the variable pointed to by - <a class="permalink" href="#count"><i class="Em" id="count">count</i></a> - will be updated. - <p class="Pp">This function is primarily used by the page-fault handing - mechanism.</p> - </dd> - <dt id="VOP_PUTPAGES"><a class="permalink" href="#VOP_PUTPAGES"><code class="Fn">VOP_PUTPAGES</code></a>(<var class="Fa">vp</var>, - <var class="Fa">offlo</var>, <var class="Fa">offhi</var>, - <var class="Fa">flags</var>)</dt> - <dd>Write modified (dirty) VM pages to file. The argument - <var class="Fa">vp</var> is the vnode to write the VM pages to. The - vnode's vm object lock (<var class="Va">v_uobj.vmobjlock</var>) must be - held by the caller and will be released upon return. The arguments - <var class="Fa">offlo</var> and <var class="Fa">offhi</var> specify the - range of VM pages to write. In case <var class="Fa">offhi</var> is given - as 0, all pages at and after the start offset <var class="Fa">offlo</var> - belonging the vnode <var class="Fa">vp</var> will be written. The argument - <var class="Fa">flags</var> controls the behavior of the routine and takes - the vm pager's flags (<code class="Dv">PGO_ -prefixed</code>). If the - operation is successful zero is returned, otherwise an appropriate error - code is returned. - <p class="Pp" id="genfs_putpages">The function is primarily used by the - pageout handling mechanism and is commonly implemented indirectly by - <a class="permalink" href="#genfs_putpages"><code class="Fn">genfs_putpages</code></a>() - with the help of - <a class="permalink" href="#VOP_STRATEGY"><code class="Fn" id="VOP_STRATEGY">VOP_STRATEGY</code></a>() - and <code class="Fn">VOP_BMAP</code>().</p> - </dd> - <dt id="bp-_b_flags"><code class="Fn">VOP_STRATEGY</code>(<var class="Fa">vp</var>, - <var class="Fa">bp</var>)</dt> - <dd>Read/write a file system buffer. The argument <var class="Fa">vp</var> is - the vnode to read/write to. The argument <var class="Fa">bp</var> is the - buffer to be read or written. <code class="Fn">VOP_STRATEGY</code>() will - either read or write data to the file depending on the value of - <a class="permalink" href="#bp-_b_flags"><i class="Em">bp->b_flags</i></a>. - If the operation is successful zero is returned, otherwise an appropriate - error code is returned.</dd> - <dt id="VOP_BWRITE"><a class="permalink" href="#VOP_BWRITE"><code class="Fn">VOP_BWRITE</code></a>(<var class="Fa">vp</var>, - <var class="Fa">bp</var>)</dt> - <dd>Write a file system buffer. The argument <var class="Fa">vp</var> is the - vnode to write to. The argument <var class="Fa">bp</var> specifies the - buffer to be written. If the operation is successful zero is returned, - otherwise an appropriate error code is returned.</dd> - <dt id="VOP_GETEXTATTR"><a class="permalink" href="#VOP_GETEXTATTR"><code class="Fn">VOP_GETEXTATTR</code></a>(<var class="Fa">vp</var>, - <var class="Fa">attrnamespace</var>, <var class="Fa">name</var>, - <var class="Fa">uio</var>, <var class="Fa">size</var>, - <var class="Fa">cred</var>)</dt> - <dd>Get an extended attribute. The argument <var class="Fa">vp</var> is the - locked vnode of the file or directory from which to retrieve the - attribute. The argument <var class="Fa">attrnamespace</var> specifies the - extended attribute namespace. The argument <var class="Fa">name</var> is a - nul-terminated character string naming the attribute to retrieve. The - argument <var class="Fa">uio</var>, if not <code class="Dv">NULL</code>, - specifies where the extended attribute value is to be written. The - argument <var class="Fa">size</var>, if not <code class="Dv">NULL</code>, - will contain the number of bytes required to read all of the attribute - data upon return. In most cases, <var class="Fa">uio</var> will be - <code class="Dv">NULL</code> when <var class="Fa">size</var> is not, and - vice versa. The argument <var class="Fa">cred</var> specifies the user - credentials to use when authorizing the request.</dd> - <dt id="VOP_SETEXTATTR"><a class="permalink" href="#VOP_SETEXTATTR"><code class="Fn">VOP_SETEXTATTR</code></a>(<var class="Fa">vp</var>, - <var class="Fa">attrnamespace</var>, <var class="Fa">name</var>, - <var class="Fa">uio</var>, <var class="Fa">cred</var>)</dt> - <dd>Set an extended attribute. The argument <var class="Fa">vp</var> is the - locked vnode of the file or directory to which to store the attribute. The - argument <var class="Fa">namespace</var> specifies the extended attribute - namespace. The argument <var class="Fa">name</var> is a nul-terminated - character string naming the attribute to store. The argument - <var class="Fa">uio</var> specifies the source of the extended attribute - data. The argument <var class="Fa">cred</var> specifies the user - credentials to use when authorizing the request.</dd> - <dt id="VOP_LISTEXTATTR"><a class="permalink" href="#VOP_LISTEXTATTR"><code class="Fn">VOP_LISTEXTATTR</code></a>(<var class="Fa">vp</var>, - <var class="Fa">attrnamespace</var>, <var class="Fa">uio</var>, - <var class="Fa">size</var>, <var class="Fa">cred</var>)</dt> - <dd>Retrieve the list of extended attributes. The argument - <var class="Fa">vp</var> is the locked vnode of the file or directory - whose attributes are to be listed. The argument - <var class="Fa">attrnamespace</var> specifies the extended attribute - namespace. The argument <var class="Fa">uio</var>, if not - <code class="Dv">NULL</code>, specifies where the extended attribute list - is to be written. The argument <var class="Fa">size</var>, if not - <code class="Dv">NULL</code>, will contain the number of bytes required to - read all of the attribute names upon return. In most cases, - <var class="Fa">uio</var> will be <code class="Dv">NULL</code> when - <var class="Fa">size</var> is not, and vice versa. The argument - <var class="Fa">cred</var> specifies the user credentials to use when - authorizing the request.</dd> - <dt id="VOP_DELETEEXTATTR"><a class="permalink" href="#VOP_DELETEEXTATTR"><code class="Fn">VOP_DELETEEXTATTR</code></a>(<var class="Fa">vp</var>, - <var class="Fa">attrnamespace</var>, <var class="Fa">name</var>, - <var class="Fa">cred</var>)</dt> - <dd>Remove attribute <var class="Fa">name</var> from file associated with - <var class="Fa">vp</var>. The argument <var class="Fa">attrnamespace</var> - specifies the extended attribute namespace. If full removal is not - supported, the file system should return - <code class="Er">EOPNOTSUPP</code> to allow the caller to zero out the - value with <code class="Fn">VOP_SETEXTATTR</code>(). - <p class="Pp">The vnode <var class="Fa">vp</var> should be locked on entry - and will remain locked on return.</p> - </dd> -</dl> -</section> -<section class="Sh"> -<h1 class="Sh" id="FILES"><a class="permalink" href="#FILES">FILES</a></h1> -<p class="Pp"><span class="Pa">src/sys/kern/vnode_if.src</span> contains the - list of vnode functions, their definitions and an exact locking - protocol.</p> -</section> -<section class="Sh"> -<h1 class="Sh" id="ERRORS"><a class="permalink" href="#ERRORS">ERRORS</a></h1> -<dl class="Bl-tag"> - <dt id="EACCES">[<a class="permalink" href="#EACCES"><code class="Er">EACCES</code></a>]</dt> - <dd>Access for the specified operation is denied.</dd> - <dt id="EDQUOT">[<a class="permalink" href="#EDQUOT"><code class="Er">EDQUOT</code></a>]</dt> - <dd>Quota exceeded.</dd> - <dt id="EINVAL">[<a class="permalink" href="#EINVAL"><code class="Er">EINVAL</code></a>]</dt> - <dd>attempt to read from an illegal offset in the directory; unrecognized - input</dd> - <dt id="EIO">[<a class="permalink" href="#EIO"><code class="Er">EIO</code></a>]</dt> - <dd>a read error occurred while reading the directory or reading the contents - of a symbolic link</dd> - <dt id="EJUSTRETURN">[<a class="permalink" href="#EJUSTRETURN"><code class="Er">EJUSTRETURN</code></a>]</dt> - <dd>A CREATE or RENAME operation would be successful.</dd> - <dt id="ENOATTR">[<a class="permalink" href="#ENOATTR"><code class="Er">ENOATTR</code></a>]</dt> - <dd>The requested attribute is not defined for this vnode.</dd> - <dt id="ENOENT">[<a class="permalink" href="#ENOENT"><code class="Er">ENOENT</code></a>]</dt> - <dd>The component was not found in the directory.</dd> - <dt id="ENOSPC">[<a class="permalink" href="#ENOSPC"><code class="Er">ENOSPC</code></a>]</dt> - <dd>The file system is full.</dd> - <dt id="ENOTDIR">[<a class="permalink" href="#ENOTDIR"><code class="Er">ENOTDIR</code></a>]</dt> - <dd>The vnode does not represent a directory.</dd> - <dt id="ENOTEMPTY">[<a class="permalink" href="#ENOTEMPTY"><code class="Er">ENOTEMPTY</code></a>]</dt> - <dd>attempt to remove a directory which is not empty</dd> - <dt id="EPERM">[<a class="permalink" href="#EPERM"><code class="Er">EPERM</code></a>]</dt> - <dd>an attempt was made to change an immutable file</dd> - <dt id="EROFS">[<a class="permalink" href="#EROFS"><code class="Er">EROFS</code></a>]</dt> - <dd>the file system is read-only</dd> -</dl> -</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">extattr(9)</a>, <a class="Xr">intro(9)</a>, - <a class="Xr">namei(9)</a>, <a class="Xr">vattr(9)</a>, - <a class="Xr">vfs(9)</a>, <a class="Xr">vfsops(9)</a>, - <a class="Xr">vnode(9)</a></p> -</section> -<section class="Sh"> -<h1 class="Sh" id="HISTORY"><a class="permalink" href="#HISTORY">HISTORY</a></h1> -<p class="Pp">The vnode operations vector, its functions and the corresponding - macros appeared in <span class="Ux">4.3BSD</span>.</p> -</section> -</div> -<table class="foot"> - <tr> - <td class="foot-date">June 15, 2023</td> - <td class="foot-os">NetBSD 10.1</td> - </tr> -</table> |