NAME¶
vget —
get a vnode from the free list
SYNOPSIS¶
#include
<sys/param.h>
#include
<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
Doug
Rabson.
