VINVALBUF(9)						   BSD Kernel Developer's Manual					      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, int slpflag, int slptimeo);

DESCRIPTION

     The vinvalbuf() function invalidates all of the buffers associated 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 indicates 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.

     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 remains 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);
	   error = vinvalbuf(devvp, V_SAVE, cred, 0, 0);
	   VOP_UNLOCK(devvp, 0);
	   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 signal.  (With PCATCH set in slpflag)

SEE ALSO

     tsleep(9), VOP_FSYNC(9)

AUTHORS

     This manual page was written by Chad David <davidc@acns.ab.ca>.

BSD
								 October 20, 2008							       BSD