table of contents
|VGET(9)||Kernel Developer's Manual||VGET(9)|
vget — get a vnode
from the free list
vnode *vp, int
lockflag, struct thread
Get a vnode from the free list and increment its reference count.
- The vnode to remove from the free list.
- 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
increment the reference count and remove it from the free list.
This manual page was written by Doug Rabson.
|July 24, 1996||Debian|