NAME
vwaitforio —
wait for all outstanding asynchronous
writes
SYNOPSIS
#include
<sys/types.h>
#include <sys/vnode.h>
int
vwaitforio(struct vnode *vp,
int slpflag, char *wmesg,
uint64_t slptimeo);
DESCRIPTION
Thevwaitforio()
call sleeps until all asynchronous writes associated with the vnode
vp finish. This is used by functions that need to make
sure that the writes they initiated have completed.
The
vwaitforio()
call sleeps at priority PRIBIO + 1. The
slpflag, wmesg, and
slptimeo arguments indicate flags to be passed to
tsleep_nsec(9).
This function must be called at splbio(9).
It may be important to ensure that no other
process submits asynchronous writes while a process is waiting for I/O on
this vnode. Otherwise,
vwaitforio()
may never return.
RETURN VALUES
The vwaitforio() function returns 0 on
success. See tsleep(9) for possible error returns.