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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 vdrop(struct vnode *vp); void vdropl(struct vnode *vp); DESCRIPTION The vhold() function increments 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 refer- enced, it will be freed. The difference between vdrop() and vdropl() is that vdrop() locks the vn- ode interlock and then calls vdropl() while vdropl() expects the inter- lock to already be locked. SEE ALSO vbusy(9), vfree(9) AUTHORS This manual page was written by Chad David <davidc@acns.ab.ca>. BSD April 1, 2007 BSD
NAME | SYNOPSIS | DESCRIPTION | SEE ALSO | AUTHORS
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