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>
134 lines
3.2 KiB
C
134 lines
3.2 KiB
C
/******************************************************************************
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* tools/xenpaging/lib/xc.c
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*
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* libxc-type add-ons for paging support.
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*
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* Copyright (c) 2009 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, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <errno.h>
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#include <string.h>
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#include <stdarg.h>
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#include <sys/poll.h>
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#include <xc_private.h>
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#include <xg_save_restore.h>
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#include <xs.h>
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#include "xc.h"
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int alloc_bitmap(unsigned long **bitmap, unsigned long bitmap_size)
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{
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if ( *bitmap == NULL )
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{
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*bitmap = calloc(bitmap_size / BITS_PER_LONG, sizeof(unsigned long));
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if ( *bitmap == NULL )
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return -ENOMEM;
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}
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memset(*bitmap, 0, bitmap_size / 8);
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return 0;
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}
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int xc_mem_paging_flush_ioemu_cache(domid_t domain_id)
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{
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struct xs_handle *xsh = NULL;
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char path[80];
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int rc;
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sprintf(path, "/local/domain/0/device-model/%u/command", domain_id);
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xsh = xs_daemon_open();
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if ( xsh == NULL )
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return -EIO;
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rc = xs_write(xsh, XBT_NULL, path, "flush-cache", strlen("flush-cache"));
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xs_daemon_close(xsh);
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return rc;
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}
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int xc_wait_for_event_or_timeout(xc_interface *xch, int xce_handle, unsigned long ms)
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{
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struct pollfd fd = { .fd = xce_handle, .events = POLLIN | POLLERR };
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int port;
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int rc;
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rc = poll(&fd, 1, ms);
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if ( rc == -1 )
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{
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if (errno == EINTR)
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return 0;
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ERROR("Poll exited with an error");
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goto err;
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}
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if ( rc == 1 )
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{
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port = xc_evtchn_pending(xce_handle);
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if ( port == -1 )
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{
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ERROR("Failed to read port from event channel");
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goto err;
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}
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rc = xc_evtchn_unmask(xce_handle, port);
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if ( rc != 0 )
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{
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ERROR("Failed to unmask event channel port");
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goto err;
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}
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}
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else
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port = -1;
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return port;
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err:
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return -errno;
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}
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int xc_wait_for_event(xc_interface *xch, int xce_handle)
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{
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return xc_wait_for_event_or_timeout(xch, xce_handle, -1);
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}
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int xc_get_platform_info(xc_interface *xc_handle, domid_t domain_id,
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xc_platform_info_t *platform_info)
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{
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return get_platform_info(xc_handle, domain_id,
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&platform_info->max_mfn,
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&platform_info->hvirt_start,
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&platform_info->pt_levels,
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&platform_info->guest_width);
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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-set-style: "BSD"
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* c-basic-offset: 4
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* tab-width: 4
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* indent-tabs-mode: nil
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* End:
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*/
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