1.\" $OpenBSD: vwaitforio.9,v 1.14 2015/09/14 15:14:55 schwarze Exp $ 2.\" 3.\" Copyright (c) 2001 Constantine Sapuntzakis 4.\" All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 10.\" 1. Redistributions of source code must retain the above copyright 11.\" notice, this list of conditions and the following disclaimer. 12.\" 2. The name of the author may not be used to endorse or promote products 13.\" derived from this software without specific prior written permission. 14.\" 15.\" THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, 16.\" INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY 17.\" AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 18.\" THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 19.\" EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 20.\" PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 21.\" OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 22.\" WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 23.\" OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 24.\" ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25.\" 26.Dd $Mdocdate: September 14 2015 $ 27.Dt VWAITFORIO 9 28.Os 29.Sh NAME 30.Nm vwaitforio 31.Nd wait for all outstanding asynchronous writes 32.Sh SYNOPSIS 33.In sys/types.h 34.In sys/vnode.h 35.Ft int 36.Fn vwaitforio "struct vnode *vp" "int slpflag" "char *wmesg" "int slptimeo" 37.Sh DESCRIPTION 38The 39.Fn vwaitforio 40call sleeps until all asynchronous writes associated with the vnode 41.Fa vp 42finish. 43This is used by functions that need to make sure 44that the writes they initiated have completed. 45.Pp 46The 47.Fn vwaitforio 48call sleeps at priority 49.Dv PRIBIO 50+ 1 . 51The 52.Fa slpflag , 53.Fa wmesg , 54and 55.Fa slptimeo 56arguments indicate flags to be passed to 57.Xr tsleep 9 . 58.Pp 59This function must be called at 60.Xr splbio 9 . 61.Pp 62It may be important to ensure that no other process submits asynchronous 63writes while a process is waiting for I/O on this vnode. 64Otherwise, 65.Fn vwaitforio 66may never return. 67.Sh RETURN VALUES 68The 69.Fn vwaitforio 70function returns 0 on success. 71See 72.Xr tsleep 9 73for possible error returns. 74.Sh SEE ALSO 75.Xr tsleep 9 , 76.Xr vnode 9 77