vget9
Get a vnode from the free list
Usage
#include <sys/param.h>
#include <sys/vnode.h>
int
vget(struct vnode *vp, int lockflag, struct thread *td);
Overview
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.
Releases
83 releases since FreeBSD 2.2.2-RELEASE; the text changed 41 times.