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https://github.com/xen-project/xen.git
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Paul Durrant
8f76fc6c98
Add code to track the address of the VM generation ID buffer across a save/restore or migrate, and increment it as necessary. The address of the buffer is written into xenstore by hvmloader at boot time. It must be read from xenstore by the caller of xc_domain_save() and then written back again by the caller of xc_domain_restore(). Note that the changes to xc_save.c and xc_restore.c are merely sufficient for them to build. Signed-off-by: Paul Durrant <paul.durrant@citrix.com> Committed-by: Ian Jackson <ian.jackson.citrix.com>
64 lines
1.5 KiB
C
64 lines
1.5 KiB
C
/*
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* This file is subject to the terms and conditions of the GNU General
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* Public License. See the file "COPYING" in the main directory of
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* this archive for more details.
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*
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* Copyright (C) 2005 by Christian Limpach
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*
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*/
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#include <err.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <xenctrl.h>
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#include <xenguest.h>
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int
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main(int argc, char **argv)
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{
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unsigned int domid, store_evtchn, console_evtchn;
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unsigned int hvm, pae, apic;
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xc_interface *xch;
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int io_fd, ret;
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int superpages;
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unsigned long store_mfn, console_mfn;
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if ( (argc != 8) && (argc != 9) )
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errx(1, "usage: %s iofd domid store_evtchn "
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"console_evtchn hvm pae apic [superpages]", argv[0]);
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xch = xc_interface_open(0,0,0);
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if ( !xch )
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errx(1, "failed to open control interface");
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io_fd = atoi(argv[1]);
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domid = atoi(argv[2]);
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store_evtchn = atoi(argv[3]);
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console_evtchn = atoi(argv[4]);
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hvm = atoi(argv[5]);
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pae = atoi(argv[6]);
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apic = atoi(argv[7]);
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if ( argc == 9 )
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superpages = atoi(argv[8]);
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else
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superpages = !!hvm;
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ret = xc_domain_restore(xch, io_fd, domid, store_evtchn, &store_mfn,
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console_evtchn, &console_mfn, hvm, pae, superpages,
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0, NULL);
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if ( ret == 0 )
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{
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printf("store-mfn %li\n", store_mfn);
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if ( !hvm )
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printf("console-mfn %li\n", console_mfn);
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fflush(stdout);
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}
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xc_interface_close(xch);
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return ret;
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}
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