76 lines
2.8 KiB
Groff
76 lines
2.8 KiB
Groff
.\" $NetBSD: LWP_CACHE_CREDS.9,v 1.2 2007/12/09 08:53:57 yamt Exp $
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.\"
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.\" Copyright (c)2007 YAMAMOTO Takashi,
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" ------------------------------------------------------------
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.Dd December 9, 2007
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.Dt LWP_CACHE_CREDS 9
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.Os
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.\" ------------------------------------------------------------
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.Sh NAME
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.Nm LWP_CACHE_CREDS
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.Nd synchronize LWP credential with process credential
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.\" ------------------------------------------------------------
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.Sh SYNOPSIS
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.In sys/lwp.h
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.\" - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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.Ft void
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.Fn LWP_CACHE_CREDS \
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"lwp_t *l" "struct proc *p"
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.\" ------------------------------------------------------------
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.Sh DESCRIPTION
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.Fn LWP_CACHE_CREDS
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updates the LWP's cached credential to match with the process' credential
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if the latter has been changed after the last synchronization.
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.Pp
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Each LWPs have its cached credential so that it can be used without
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worrying about potential of other LWP changing the process' credential.
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.Fn kauth_cred_get
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returns the cached credential.
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.Pp
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.Fn LWP_CACHE_CREDS
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is called by MD entry code for system call and various traps.
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LWPs which can live in kernel for long period should call
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.Fn LWP_CACHE_CREDS
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by itsself to refresh its credential.
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.Pp
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.Fn LWP_CACHE_CREDS
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takes the following arguments.
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.Bl -tag -width l
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.It Fa l
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The calling lwp.
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.It Fa p
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The process which the lwp
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.Fa l
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belongs to.
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.El
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.Pp
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.Fn LWP_CACHE_CREDS
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might be implemented as a macro.
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.\" ------------------------------------------------------------
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.Sh SEE ALSO
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.Xr intro 9 ,
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.Xr kauth 9
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