1.\" -*- nroff -*- 2.\" 3.\" Copyright (c) 2013 Hudson River Trading LLC 4.\" Written by: John H. Baldwin <jhb@FreeBSD.org> 5.\" All rights reserved. 6.\" 7.\" Redistribution and use in source and binary forms, with or without 8.\" modification, are permitted provided that the following conditions 9.\" are met: 10.\" 1. Redistributions of source code must retain the above copyright 11.\" notice, this list of conditions and the following disclaimer. 12.\" 2. Redistributions in binary form must reproduce the above copyright 13.\" notice, this list of conditions and the following disclaimer in the 14.\" documentation and/or other materials provided with the distribution. 15.\" 16.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26.\" SUCH DAMAGE. 27.\" 28.\" $FreeBSD$ 29.\" 30.Dd October 3, 2013 31.Dt VOP_ALLOCATE 9 32.Os 33.Sh NAME 34.Nm VOP_ALLOCATE 35.Nd allocate storage for a file 36.Sh SYNOPSIS 37.In sys/param.h 38.In sys/vnode.h 39.Ft int 40.Fn VOP_ALLOCATE "struct vnode *vp" "off_t *offset" "off_t *len" 41.Sh DESCRIPTION 42This call allocates storage for a range of offsets in a file. 43It is used to implement the 44.Xr posix_fallocate 45system call. 46.Pp 47Its arguments are: 48.Bl -tag -width offset 49.It Fa vp 50The vnode of the file. 51.It Fa offset 52The start of the range to allocate storage for in the file. 53.It Fa len 54The length of the range to allocate storage for in the file. 55.El 56.Pp 57The 58.Fa offset 59and 60.Fa len 61arguments are updated to reflect the portion of the range that 62still needs to be allocated on return. 63A partial allocation is considered a successful operation. 64The file's contents are not changed. 65.Sh LOCKS 66The file should be exclusively locked on entry and will still be locked on exit. 67.Sh RETURN VALUES 68Zero is returned if the call is successful, otherwise an appropriate 69error code is returned. 70.Sh ERRORS 71.Bl -tag -width Er 72.It Bq Er EFBIG 73An attempt was made to write a file that exceeds the process's file size 74limit or the maximum file size. 75.It Bq Er ENOSPC 76The file system is full. 77.It Bq Er EPERM 78An append-only flag is set on the file, but the caller is attempting to 79write before the current end of file. 80.El 81.Sh SEE ALSO 82.Xr vnode 9 , 83.Xr VOP_READ 9 , 84.Xr VOP_WRITE 9 85