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Man Pages


Manual Reference Pages  -  VGET (9)

NAME

vget - get a vnode from the free list

CONTENTS

Synopsis
Description
See Also
Authors

SYNOPSIS


.In sys/param.h
.In sys/vnode.h int vget struct vnode *vp int lockflag struct thread *td

DESCRIPTION

Get a vnode from the free list and increment its reference count.
vp The vnode to remove from the free list.
lockflag
  If non-zero, the vnode will also be locked.

When not in use, vnodes are kept on a free list. The vnodes still reference valid files but may be reused to refer to a new file at any time. Often, these vnodes are also held in caches in the system, such as the name cache.

When a vnode which is on the free list is used again, for instance if the vnode was found in the name cache as a result of a call to VOP_LOOKUP(9) then the new user must call vget to increment the reference count and remove it from the free list.

SEE ALSO

vnode(9), vput(9), vref(9), vrele(9)

AUTHORS

This manual page was written by
.An Doug Rabson .
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