vinvalbuf(9)

NAME

vinvalbuf - flushes and invalidates all buffers associated

with a vnode

SYNOPSIS

#include <sys/param.h>
#include <sys/vnode.h>
int
vinvalbuf(struct vnode *vp, int flags, struct ucred *cred,
        struct thread *td, int slpflag, int slptimeo);

DESCRIPTION

The vinvalbuf() function invalidates all of the buffers as

sociated with
the given vnode. This includes buffers on the clean list

and the dirty
list. If the V_SAVE flag is specified then the buffers on

the dirty list
are synced prior to being released. If there is a VM Object

associated
with the vnode, it is removed.

Its arguments are:

vp A pointer to the vnode whose buffers will be

invalidated.

flags The only supported flag is V_SAVE and it indi

cates that

dirty buffers should be synced with the disk.

cred The user credentials that are used to

VOP_FSYNC(9) buffers

if V_SAVE is set.

td The thread responsible for this call.

slpflag The slp flag that will be used in the priority

of any

sleeps in the function.

slptimeo The timeout for any sleeps in the function.

LOCKS

The vnode is assumed to be locked prior to the call and re

mains locked
upon return.

Giant must be held by prior to the call and remains locked

upon return.

RETURN VALUES

A 0 value is returned on success.

PSEUDOCODE

vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td);
error = vinvalbuf(devvp, V_SAVE, cred, td, 0, 0);
VOP_UNLOCK(devvp, 0, td);
if (error)

return (error);

ERRORS

[ENOSPC] The file system is full. (With V_SAVE)

[EDQUOT] Disc quota exceeded. (With V_SAVE)

[EWOULDBLOCK] Sleep operation timed out. (See

slptimeo)

[ERESTART] A signal needs to be delivered and the

system call

should be restarted. (With PCATCH set in

slpflag)

[EINTR] The system has been interrupted by a sig

nal. (With

PCATCH set in slpflag)

SEE ALSO

brelse(9), bremfree(9), tsleep(9), VOP_FSYNC(9)

AUTHORS

This manual page was written by Chad David <davidc@ac

ns.ab.ca>.

BSD July 7, 2001

BSD