| vhold.9 (87182) | vhold.9 (87857) |
|---|---|
| 1.\" 2.\" Copyright (C) 2001 Chad David <davidc@acns.ab.ca>. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice(s), this list of conditions and the following disclaimer as --- 10 unchanged lines hidden (view full) --- 19.\" DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 20.\" (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 21.\" SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 22.\" CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH 25.\" DAMAGE. 26.\" | 1.\" 2.\" Copyright (C) 2001 Chad David <davidc@acns.ab.ca>. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice(s), this list of conditions and the following disclaimer as --- 10 unchanged lines hidden (view full) --- 19.\" DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 20.\" (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 21.\" SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 22.\" CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH 25.\" DAMAGE. 26.\" |
| 27.\" $FreeBSD: head/share/man/man9/vhold.9 87182 2001-12-02 02:13:35Z alfred $ | 27.\" $FreeBSD: head/share/man/man9/vhold.9 87857 2001-12-14 09:11:13Z ru $ |
| 28.\" 29.Dd November 21, 2001 30.Dt VHOLD 9 31.Os 32.Sh NAME | 28.\" 29.Dd November 21, 2001 30.Dt VHOLD 9 31.Os 32.Sh NAME |
| 33.Nm vhold 34.Nm vdrop 35.Nd "aquire/release a hold on a vnode" | 33.Nm vhold , vdrop 34.Nd "acquire/release a hold on a vnode" |
| 36.Sh SYNOPSIS 37.In sys/param.h 38.In sys/vnode.h 39.Ft void 40.Fn vhold "struct vnode *vp" 41.Ft void 42.Fn vdrop "struct vnode *vp" 43.Sh DESCRIPTION 44The 45.Fn vhold | 35.Sh SYNOPSIS 36.In sys/param.h 37.In sys/vnode.h 38.Ft void 39.Fn vhold "struct vnode *vp" 40.Ft void 41.Fn vdrop "struct vnode *vp" 42.Sh DESCRIPTION 43The 44.Fn vhold |
| 46function increments the v_holdcnt of the given vnode. 47If the vnode has already been added to the free list and is still referenced | 45function increments the 46.Va v_holdcnt 47of the given vnode. 48If the vnode has already been added to the free list and is still referenced, |
| 48it will be removed. 49.Pp 50The 51.Fn vdrop | 49it will be removed. 50.Pp 51The 52.Fn vdrop |
| 52function decrements the v_holdcnt of the vnode. 53If the holdcount is zero or less prior to calling 54.Fn vdrop | 53function decrements the 54.Va v_holdcnt 55of the vnode. 56If the holdcount is less than or equal zero prior to calling 57.Fn vdrop , |
| 55the system will panic. | 58the system will panic. |
| 56If the vnode is no longer referenced it will freed. | 59If the vnode is no longer referenced, it will freed. |
| 57.Sh SEE ALSO | 60.Sh SEE ALSO |
| 58.Xr vfree 9 , 59.Xr vbusy 9 | 61.Xr vbusy 9 , 62.Xr vfree 9 |
| 60.Sh AUTHORS 61This man page was written by 62.An Chad David Aq davidc@acns.ab.ca . | 63.Sh AUTHORS 64This man page was written by 65.An Chad David Aq davidc@acns.ab.ca . |