1.\" $NetBSD: LWP_CACHE_CREDS.9,v 1.2 2007/12/09 08:53:57 yamt Exp $ 2.\" 3.\" Copyright (c)2007 YAMAMOTO Takashi, 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.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, 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 AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22.\" HOWEVER 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 25.\" SUCH DAMAGE. 26.\" 27.\" ------------------------------------------------------------ 28.Dd December 9, 2007 29.Dt LWP_CACHE_CREDS 9 30.Os 31.\" ------------------------------------------------------------ 32.Sh NAME 33.Nm LWP_CACHE_CREDS 34.Nd synchronize LWP credential with process credential 35.\" ------------------------------------------------------------ 36.Sh SYNOPSIS 37.In sys/lwp.h 38.\" - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 39.Ft void 40.Fn LWP_CACHE_CREDS \ 41"lwp_t *l" "struct proc *p" 42.\" ------------------------------------------------------------ 43.Sh DESCRIPTION 44.Fn LWP_CACHE_CREDS 45updates the LWP's cached credential to match with the process' credential 46if the latter has been changed after the last synchronization. 47.Pp 48Each LWPs have its cached credential so that it can be used without 49worrying about potential of other LWP changing the process' credential. 50.Fn kauth_cred_get 51returns the cached credential. 52.Pp 53.Fn LWP_CACHE_CREDS 54is called by MD entry code for system call and various traps. 55LWPs which can live in kernel for long period should call 56.Fn LWP_CACHE_CREDS 57by itsself to refresh its credential. 58.Pp 59.Fn LWP_CACHE_CREDS 60takes the following arguments. 61.Bl -tag -width l 62.It Fa l 63The calling lwp. 64.It Fa p 65The process which the lwp 66.Fa l 67belongs to. 68.El 69.Pp 70.Fn LWP_CACHE_CREDS 71might be implemented as a macro. 72.\" ------------------------------------------------------------ 73.Sh SEE ALSO 74.Xr intro 9 , 75.Xr kauth 9 76