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phk 2005-03-14 15:38:34 +00:00
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23
share/man/man9/VFS_VGET.9
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@ -43,30 +43,33 @@
.Sh DESCRIPTION
The
.Fn VFS_VGET
macro converts an inode number into a locked vnode.
looks up or creates a vnode from a (mount, inode#) tupple.
.Pp
Its arguments are:
.Bl -tag -width ".Fa flags"
.It Fa mp
The file system.
The mountpoint.
.It Fa ino
The inode representing the file.
This is a unique number assigned by the filesystem when vnodes are first
created.
.It Fa flags
Additional locking flags to pass through.
Additional locking flags to pass through to
.Xr vget 9
.It Fa vpp
Return parameter for the vnode.
.El
.Pp
This is an optional file system entry-point for file systems which have a
unique id number for every file in the file system.
It is used
internally by the UFS file system and also by the NFSv3 server to
implement the
.Dv READDIRPLUS
nfs call.
This is an optional file system entry-point for file systems mainly
intended for NFS server use, but many filesystems
use it internally in
.Xr VOP_LOOKUP 9
and similar.
.Pp
If the file system does not support this call, then it should return
.Er EOPNOTSUPP .
.Pp
Please see sys/ufs/ffs/ffs_vfsops.c::ffs_vget() for the canonical example.
.Sh SEE ALSO
.Xr VFS 9 ,
.Xr vget 9 ,