From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- fs/xfs/support/move.c | 66 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 66 insertions(+) create mode 100644 fs/xfs/support/move.c (limited to 'fs/xfs/support/move.c') diff --git a/fs/xfs/support/move.c b/fs/xfs/support/move.c new file mode 100644 index 000000000000..15b5194f16b2 --- /dev/null +++ b/fs/xfs/support/move.c @@ -0,0 +1,66 @@ +/* + * Copyright (c) 2000-2003 Silicon Graphics, Inc. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it would be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. + * + * Further, this software is distributed without any warranty that it is + * free of the rightful claim of any third person regarding infringement + * or the like. Any license provided herein, whether implied or + * otherwise, applies only to this software file. Patent licenses, if + * any, provided herein do not apply to combinations of this program with + * other software, or any other product whatsoever. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write the Free Software Foundation, Inc., 59 + * Temple Place - Suite 330, Boston MA 02111-1307, USA. + * + * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy, + * Mountain View, CA 94043, or: + * + * http://www.sgi.com + * + * For further information regarding this notice, see: + * + * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/ + */ + +#include + +/* Read from kernel buffer at src to user/kernel buffer defined + * by the uio structure. Advance the pointer in the uio struct + * as we go. + */ +int +uio_read(caddr_t src, size_t len, struct uio *uio) +{ + size_t count; + + if (!len || !uio->uio_resid) + return 0; + + count = uio->uio_iov->iov_len; + if (!count) + return 0; + if (count > len) + count = len; + + if (uio->uio_segflg == UIO_USERSPACE) { + if (copy_to_user(uio->uio_iov->iov_base, src, count)) + return EFAULT; + } else { + ASSERT(uio->uio_segflg == UIO_SYSSPACE); + memcpy(uio->uio_iov->iov_base, src, count); + } + + uio->uio_iov->iov_base = (void*)((char*)uio->uio_iov->iov_base + count); + uio->uio_iov->iov_len -= count; + uio->uio_offset += count; + uio->uio_resid -= count; + return 0; +} -- cgit v1.2.3