VOP_ADVLOCK(9)         FreeBSD Kernel Developer's Manual        VOP_ADVLOCK(9)

NAME
     VOP_ADVLOCK - advisory record locking

SYNOPSIS
     #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);

DESCRIPTION
     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 or more of the following:

                  F_WAIT        Wait until lock is granted.
                  F_FLOCK       Use flock(2) semantics for lock.
                  F_POSIX       Use POSIX semantics for lock.
                  F_REMOTE      Lock owner is remote NFS client.
                  F_NOINTR      Mask signals while waiting for the 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.

SEE ALSO
     fcntl(2), flock(2), vnode(9)

AUTHORS
     This manual page was written by Doug Rabson.

FreeBSD 13.1-RELEASE-p6        February 10, 2021       FreeBSD 13.1-RELEASE-p6