VFS_SYNC(9) BSD Kernel Developer's Manual VFS_SYNC(9)NAME
VFS_SYNC -- flush unwritten data
SYNOPSIS
#include <sys/param.h>
#include <sys/mount.h>
#include <sys/vnode.h>
int
VFS_SYNC(struct mount *mp, int waitfor);
DESCRIPTION
The VFS_SYNC() macro writes out all unwritten data in the file system mounted as mp.
The arguments it expects are:
mp The file system.
waitfor Whether the function should wait for I/O to complete. Possible values are:
MNT_WAIT synchronously wait for I/O to complete
MNT_NOWAIT start all I/O, but do not wait for it
MNT_LAZY push data not written by file system syncer
The VFS_SYNC() macro calls the vfs_sync method of the file system, which normally calls VOP_FSYNC(9) for all the vnodes in the file system.
SEE ALSO fsync(2), sync(2), VFS(9), vnode(9), VOP_FSYNC(9)AUTHORS
This manual page was written by Doug Rabson.
BSD May 23, 2009 BSD
Check Out this Related Man Page
VOP_FSYNC(9) BSD Kernel Developer's Manual VOP_FSYNC(9)NAME
VOP_FSYNC -- flush file system buffers for a file
SYNOPSIS
#include <sys/param.h>
#include <sys/vnode.h>
int
VOP_FSYNC(struct vnode *vp, int waitfor, struct thread *td);
DESCRIPTION
This call flushes any dirty file system buffers for the file. It is used to implement the sync(2) and fsync(2) system calls.
Its arguments are:
vp The vnode of the file.
waitfor Whether the function should wait for I/O to complete. Possible values are:
MNT_WAIT Synchronously wait for I/O to complete.
MNT_NOWAIT Start all I/O, but do not wait for it.
MNT_LAZY Push data not written by file system syncer.
td The calling thread.
The argument waitfor is either MNT_WAIT or MNT_NOWAIT and specifies whether or not the function should wait for the writes to finish before
returning.
LOCKS
The file should be locked on entry.
RETURN VALUES
Zero is returned if the call is successful, otherwise an appropriate error code is returned.
ERRORS
[ENOSPC] The file system is full.
[EDQUOT] Quota exceeded.
SEE ALSO vnode(9)AUTHORS
This manual page was written by Doug Rabson.
BSD July 24, 1996 BSD
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