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 9.\" the first lines of this file unmodified other than the possible 10.\" addition of one or more copyright notices. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice(s), this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 15.\" THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY 16.\" EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 17.\" WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 18.\" DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE LIABLE FOR ANY 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.Dd November 21, 2001 28.Dt VFS_GETVFS 9 29.Os 30.Sh NAME 31.Nm vfs_getvfs 32.Nd "returns a mount point given its file system identifier" 33.Sh SYNOPSIS 34.In sys/param.h 35.In sys/mount.h 36.Ft "struct mount *" 37.Fn vfs_getvfs "fsid_t *fsid" 38.Sh DESCRIPTION 39The 40.Fn vfs_getvfs 41function returns the mount point structure for a file system given its file system 42identifier. 43The file system ID should have been allocated by calling 44.Xr vfs_getnewfsid 9 ; 45otherwise, it will not be found. 46.Pp 47A major user of 48.Fn vfs_getvfs 49is NFS, which uses the 50.Vt fsid 51as part of file handles in order to determine the 52file system a given RPC is for. 53If 54.Fn vfs_getvfs 55fails to find the mount point related to 56.Fa fsid , 57the file system is considered stale. 58.Sh RETURN VALUES 59If 60.Fa fsid 61is found, the mount point for the ID is returned; otherwise, 62.Dv NULL 63is returned. 64.Sh PSEUDOCODE 65.Bd -literal 66if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) { 67 error = ESTALE; 68 goto out; 69} 70.Ed 71.Sh SEE ALSO 72.Xr vfs_getnewfsid 9 73.Sh AUTHORS 74This manual page was written by 75.An Chad David Aq Mt davidc@acns.ab.ca . 76