VFS_SYNC (9)

Leading comments

Copyright (c) 1996 Doug Rabson

All rights reserved.

This program is free software.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
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1. Redistributions of source code must retain the above copyright
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   notice, this list of conditions and the following disclaimer in...

(The comments found at the beginning of the groff file "man9/VFS_SYNC.9freebsd".)

NAME

VFS_SYNC - flush unwritten data

SYNOPSIS

In sys/param.h In sys/mount.h In sys/vnode.h Ft int Fn VFS_SYNC struct mount *mp int waitfor

DESCRIPTION

The Fn VFS_SYNC macro writes out all unwritten data in the file system mounted as Fa mp .

The arguments it expects are:

Fa mp

The file system.

Fa 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 Fn VFS_SYNC macro calls the vfs_sync method of the file system, which normally calls VOP_FSYNC9 for all the vnodes in the file system.

SEE ALSO

fsync(2), sync(2), VFS(9), vnode(9), VOP_FSYNC9

AUTHORS

This manual page was written by An Doug Rabson .