mirror of
https://github.com/xen-project/xen.git
synced 2026-10-29 02:30:03 +01:00
Keir Fraser
5cc436c1d2
This patch eliminate the global variables in libxenctrl (used for logging and error reporting). Instead the information which was in the global variables is now in a new xc_interface* opaque structure, which xc_interface open returns instead of the raw file descriptor; furthermore, logging is done via xentoollog. There are three new parameters to xc_interface_open to control the logging, but existing callers can just pass "0" for all three to get the old behaviour. All libxc callers have been adjusted accordingly. Also update QEMU_TAG for corresponding qemu change. Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
85 lines
1.9 KiB
C
85 lines
1.9 KiB
C
/******************************************************************************
|
|
* tools/xenpaging/file_ops.c
|
|
*
|
|
* Common file operations.
|
|
*
|
|
* Copyright (c) 2009 by Citrix Systems, Inc. (Patrick Colp)
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
|
|
|
|
#include <unistd.h>
|
|
#include <stdarg.h>
|
|
#include <xc_private.h>
|
|
|
|
|
|
#define page_offset(_pfn) (((off_t)(_pfn)) << PAGE_SHIFT)
|
|
|
|
|
|
static int file_op(int fd, void *page, int i,
|
|
ssize_t (*fn)(int, const void *, size_t))
|
|
{
|
|
off_t seek_ret;
|
|
int total;
|
|
int bytes;
|
|
int ret;
|
|
|
|
seek_ret = lseek(fd, i << PAGE_SHIFT, SEEK_SET);
|
|
|
|
total = 0;
|
|
while ( total < PAGE_SIZE )
|
|
{
|
|
bytes = fn(fd, page + total, PAGE_SIZE - total);
|
|
if ( bytes <= 0 )
|
|
{
|
|
ret = -errno;
|
|
goto err;
|
|
}
|
|
|
|
total += bytes;
|
|
}
|
|
|
|
return 0;
|
|
|
|
err:
|
|
return ret;
|
|
}
|
|
|
|
static ssize_t my_read(int fd, const void *buf, size_t count)
|
|
{
|
|
return read(fd, (void *)buf, count);
|
|
}
|
|
|
|
int read_page(int fd, void *page, int i)
|
|
{
|
|
return file_op(fd, page, i, &my_read);
|
|
}
|
|
|
|
int write_page(int fd, void *page, int i)
|
|
{
|
|
return file_op(fd, page, i, &write);
|
|
}
|
|
|
|
|
|
/*
|
|
* Local variables:
|
|
* mode: C
|
|
* c-set-style: "BSD"
|
|
* c-basic-offset: 4
|
|
* indent-tabs-mode: nil
|
|
* End:
|
|
*/
|