SIMPLE SOLUTIONS

VDROPL(9FREEBSD) - man page online | system kernel interfaces

Acquire/release a hold on a vnode.

Chapter
April 1, 2007
VHOLD(9)                          BSD Kernel Developer's Manual                          VHOLD(9)

NAME

vhold, vdrop, vdropl — acquire/release a hold on a vnode

SYNOPSIS

#include <sys/param.h> #include <sys/vnode.h> void vhold(struct vnode *vp); void vholdl(struct vnode *vp); void vdrop(struct vnode *vp); void vdropl(struct vnode *vp);

DESCRIPTION

The vhold() and vholdl() functions increment the v_holdcnt of the given vnode. If the vnode has already been added to the free list and is still referenced, it will be removed. The vdrop() and vdropl() functions decrement the v_holdcnt of the vnode. If the holdcount is less than or equal to zero prior to calling vdrop() or vdropl(), the system will panic. If the vnode is no longer referenced, it will be freed. vhold() and vdrop() lock the vnode interlock while vholdl() and vdropl() expect the inter‐ lock to already be held.

SEE ALSO

vnode(9)

AUTHORS

This manual page was written by Chad David <@acns.ab.ca>.
BSD April 1, 2007 BSD
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vdropl(9freebsd) referred by
refer to vhold(9freebsd) | vnode(9freebsd)