VOP_ADVLOCK9
Advisory record locking
Usage
#include <sys/param.h>
#include <sys/vnode.h>
#include <sys/fcntl.h>
#include <sys/lockf.h>
int
VOP_ADVLOCK(struct vnode *vp, caddr_t id, int op, struct flock *fl, int flags);
Overview
The arguments are:
- vp
-
The vnode being manipulated.
- id
-
The id token which is changing the lock.
- op
-
The operation to perform (see fcntl(2)).
- fl
-
Description of the lock.
- flags
-
One of more of the following:
- F_RDLCK
-
Shared or read lock.
- F_UNLCK
-
Unlock.
- F_WRLCK
-
Exclusive or write lock.
- F_WAIT
-
Wait until lock is granted.
- F_FLOCK
-
Use flock(2) semantics for lock.
- F_POSIX
-
Use POSIX semantics for lock.
This entry point manipulates advisory record locks on the file. Most file systems delegate the work for this call to lf_advlock().
Return values
Zero is returned on success, otherwise an error is returned.