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Juergen Gross
30f5e8aba1
xenpaging is using libxc internals. Fix that. Signed-off-by: Juergen Gross <jgross@suse.com> Acked-by: Wei Liu <wl@xen.org>
72 lines
1.7 KiB
C
72 lines
1.7 KiB
C
/******************************************************************************
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*
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* Common file operations.
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*
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* Copyright (c) 2009 by Citrix Systems, Inc. (Patrick Colp)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <unistd.h>
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#include <xenctrl.h>
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static int file_op(int fd, void *page, int i,
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ssize_t (*fn)(int, void *, size_t))
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{
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off_t offset = i;
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int total = 0;
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int bytes;
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offset = lseek(fd, offset << XC_PAGE_SHIFT, SEEK_SET);
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if ( offset == (off_t)-1 )
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return -1;
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while ( total < XC_PAGE_SIZE )
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{
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bytes = fn(fd, page + total, XC_PAGE_SIZE - total);
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if ( bytes <= 0 )
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return -1;
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total += bytes;
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}
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return 0;
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}
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static ssize_t my_write(int fd, void *buf, size_t count)
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{
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return write(fd, buf, count);
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}
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int read_page(int fd, void *page, int i)
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{
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return file_op(fd, page, i, &read);
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}
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int write_page(int fd, void *page, int i)
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{
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return file_op(fd, page, i, &my_write);
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}
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/*
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* Local variables:
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* mode: C
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* c-file-style: "BSD"
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* c-basic-offset: 4
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* indent-tabs-mode: nil
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* End:
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*/
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