2001-07-09 06:47:10 +00:00
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.\"
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.\" Copyright (C) 2001 Chad David <davidc@acns.ab.ca>. 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(s), this list of conditions and the following disclaimer as
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.\" the first lines of this file unmodified other than the possible
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.\" addition of one or more copyright notices.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice(s), 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 COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
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.\" EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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.\" WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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.\" DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE LIABLE FOR ANY
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.\" DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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.\" (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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.\" SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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.\" 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 SUCH
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.\" DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd July 7, 2001
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.Dt VINVALBUF 9
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.Os
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.Sh NAME
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.Nm vinvalbuf
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.Nd "Flushes and invalidates all buffers associated with a vnode"
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.Sh SYNOPSIS
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2001-07-11 03:51:44 +00:00
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.Fd #include <sys/param.h>
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2001-07-09 06:47:10 +00:00
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.Fd #include <sys/vnode.h>
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.Ft int
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2001-07-11 03:51:44 +00:00
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.Fn vinvalbuf "struct vnode *vp" "int flags" "struct ucred *cred" "struct proc *p" "int slpflag" "int slptimeo"
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2001-07-09 06:47:10 +00:00
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.Sh DESCRIPTION
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The
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.Nm
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function invalidates all of the buffers associated with the given vnode.
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This includes buffers on the clean list and the dirty list. If the V_SAVE
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flag is specified then the buffers on the dirty list are synced prior to being
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released. If there is a VM Object associated with the vnode it is removed.
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.Pp
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Its arguments are:
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.Bl -tag -width spltimeo
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.It Ar vp
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A pointer to the vnode whose buffers will be invalidated.
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.It Ar flags
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The only supported flag is V_SAVE and it indicates that dirty buffers should by synced.
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.It Ar cred
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The user credentials that are used to
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.Fn VOP_FSYNC ""
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buffers if V_SAVE is set.
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.It Ar p
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The process responsible for this call.
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.It Ar slpflag
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The slp flag that will be used in the priority of any sleeps in the function.
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.It Ar slptimeo
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The timeout for any sleeps in the function.
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.El
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.Sh LOCKS
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The vnode is assumed to be locked prior to the call and remains locked upon return.
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.Pp
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Giant must be held by prior to the call and remains locked upon return.
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.Sh RETURN VALUES
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A 0 value is returned on success.
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.Sh PSEUDOCODE
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.Bd -literal
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vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, p);
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error = vinvalbuf(devvp, V_SAVE, cred, p, 0, 0);
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VOP_UNLOCK(devvp, 0, p);
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if (error)
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return (error);
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.Ed
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.Sh ERRORS
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.Bl -tag -width Er
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.It Bq Er ENOSPC
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The filesystem is full. (With V_SAVE)
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.It Bq Er EDQUOT
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Disc quota exceeded. (With V_SAVE)
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.It Bq Er EWOULDBLOCK
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Sleep operation timed out (See slptimeo)
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.It Bq Er ERESTART
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A signal needs to be delivered and the system call should be restarted (With PCATCH set in slpflag)
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.It Bq Er EINTR
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The system has been interrupted by a signal (With PCATCH set in slpflag)
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.El
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.Sh SEE ALSO
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.Xr brelse 9
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.Xr bremfree 9
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.Xr VOP_FSYNC 9
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.Xr tsleep 9
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.Sh AUTHORS
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This man page was written by Chad David.
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