18981fef8SAlfred Perlstein.\" 28981fef8SAlfred Perlstein.\" Copyright (C) 2001 Chad David <davidc@acns.ab.ca>. All rights reserved. 38981fef8SAlfred Perlstein.\" 48981fef8SAlfred Perlstein.\" Redistribution and use in source and binary forms, with or without 58981fef8SAlfred Perlstein.\" modification, are permitted provided that the following conditions 68981fef8SAlfred Perlstein.\" are met: 78981fef8SAlfred Perlstein.\" 1. Redistributions of source code must retain the above copyright 88981fef8SAlfred Perlstein.\" notice(s), this list of conditions and the following disclaimer as 98981fef8SAlfred Perlstein.\" the first lines of this file unmodified other than the possible 108981fef8SAlfred Perlstein.\" addition of one or more copyright notices. 118981fef8SAlfred Perlstein.\" 2. Redistributions in binary form must reproduce the above copyright 128981fef8SAlfred Perlstein.\" notice(s), this list of conditions and the following disclaimer in the 138981fef8SAlfred Perlstein.\" documentation and/or other materials provided with the distribution. 148981fef8SAlfred Perlstein.\" 158981fef8SAlfred Perlstein.\" THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY 168981fef8SAlfred Perlstein.\" EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 178981fef8SAlfred Perlstein.\" WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 188981fef8SAlfred Perlstein.\" DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE LIABLE FOR ANY 198981fef8SAlfred Perlstein.\" DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 208981fef8SAlfred Perlstein.\" (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 218981fef8SAlfred Perlstein.\" SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 228981fef8SAlfred Perlstein.\" CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 238981fef8SAlfred Perlstein.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 248981fef8SAlfred Perlstein.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH 258981fef8SAlfred Perlstein.\" DAMAGE. 268981fef8SAlfred Perlstein.\" 2798744c5aSSergey Kandaurov.Dd February 11, 2013 288981fef8SAlfred Perlstein.Dt VFS_BUSY 9 298981fef8SAlfred Perlstein.Os 308981fef8SAlfred Perlstein.Sh NAME 318981fef8SAlfred Perlstein.Nm vfs_busy 3223789024SRuslan Ermilov.Nd "marks a mount point as busy" 338981fef8SAlfred Perlstein.Sh SYNOPSIS 3423789024SRuslan Ermilov.In sys/param.h 3523789024SRuslan Ermilov.In sys/mount.h 368981fef8SAlfred Perlstein.Ft int 371efbe1a4SAttilio Rao.Fn vfs_busy "struct mount *mp" "int flags" 388981fef8SAlfred Perlstein.Sh DESCRIPTION 398981fef8SAlfred PerlsteinThe 4023789024SRuslan Ermilov.Fn vfs_busy 413141712dSJaakko Heinonenfunction marks a mount point as busy by incrementing 423141712dSJaakko Heinonenthe reference count of a mount point. 43034709cbSRuslan ErmilovIt also delays unmounting by sleeping on 44034709cbSRuslan Ermilov.Fa mp 45034709cbSRuslan Ermilovif the 4623789024SRuslan Ermilov.Dv MNTK_UNMOUNT 4723789024SRuslan Ermilovflag is set in 4823789024SRuslan Ermilov.Fa mp->mnt_kern_flag 4923789024SRuslan Ermilovand the 503141712dSJaakko Heinonen.Dv MBF_NOWAIT 5123789024SRuslan Ermilovflag is 5223789024SRuslan Ermilov.Em not 5323789024SRuslan Ermilovset. 548981fef8SAlfred Perlstein.Pp 558981fef8SAlfred PerlsteinIts arguments are: 561efbe1a4SAttilio Rao.Bl -tag -width ".Fa flags" 5723789024SRuslan Ermilov.It Fa mp 588981fef8SAlfred PerlsteinThe mount point to busy. 5923789024SRuslan Ermilov.It Fa flags 60034709cbSRuslan ErmilovFlags controlling how 61034709cbSRuslan Ermilov.Fn vfs_busy 62034709cbSRuslan Ermilovshould act. 631efbe1a4SAttilio Rao.Bl -tag -width ".Dv MBF_MNTLSTLOCK" 641efbe1a4SAttilio Rao.It Dv MBF_NOWAIT 6523789024SRuslan Ermilovdo not sleep if 6623789024SRuslan Ermilov.Dv MNTK_UNMOUNT 6723789024SRuslan Ermilovis set. 681efbe1a4SAttilio Rao.It Dv MBF_MNTLSTLOCK 691efbe1a4SAttilio Raodrop the mountlist_mtx in the critical path. 7023789024SRuslan Ermilov.El 718981fef8SAlfred Perlstein.El 728981fef8SAlfred Perlstein.Sh RETURN VALUES 7323789024SRuslan ErmilovA 0 value is returned on success. 7423789024SRuslan ErmilovIf the mount point is being 753141712dSJaakko Heinonenunmounted and MBF_NOWAIT flag is specified 7623789024SRuslan Ermilov.Er ENOENT 773141712dSJaakko Heinonenwill be returned. 788981fef8SAlfred Perlstein.Sh ERRORS 7923789024SRuslan Ermilov.Bl -tag -width Er 8023789024SRuslan Ermilov.It Bq Er ENOENT 8123789024SRuslan ErmilovThe mount point is being unmounted 8223789024SRuslan Ermilov.Dv ( MNTK_UNMOUNT 8323789024SRuslan Ermilovis set). 848981fef8SAlfred Perlstein.El 8598744c5aSSergey Kandaurov.Sh SEE ALSO 8698744c5aSSergey Kandaurov.Xr vfs_unbusy 9 878981fef8SAlfred Perlstein.Sh AUTHORS 8809356c84SHiten PandyaThis manual page was written by 89*8a7314fcSBaptiste Daroussin.An Chad David Aq Mt davidc@acns.ab.ca . 90