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Andrew Cooper
6d7b67c670
If the console or store mfn chunks are not present in the migration stream,
stack junk gets reported for the mfns.
XenServer had a very hard to track down VM corruption issue caused by exactly
this issue. Xenconsoled would connect to a junk mfn and incremented the ring
pointer if the junk happend to look like a valid gfn.
Coverity ID: 1056093 1056094
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
CC: Ian Campbell <Ian.Campbell@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
(cherry picked from commit 592b614f34)
73 lines
1.9 KiB
C
73 lines
1.9 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, lflags, checkpointed;
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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 = 0, console_mfn = 0;
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xentoollog_level lvl;
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xentoollog_logger *l;
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if ( !( argc >= 8 && argc <= 10) )
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errx(1, "usage: %s iofd domid store_evtchn "
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"console_evtchn hvm pae apic [superpages [checkpointed]]", argv[0]);
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lvl = XTL_DETAIL;
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lflags = XTL_STDIOSTREAM_SHOW_PID | XTL_STDIOSTREAM_HIDE_PROGRESS;
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l = (xentoollog_logger *)xtl_createlogger_stdiostream(stderr, lvl, lflags);
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xch = xc_interface_open(l, 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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if ( argc >= 10 )
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checkpointed = atoi(argv[9]);
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else
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checkpointed = 0;
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ret = xc_domain_restore(xch, io_fd, domid, store_evtchn, &store_mfn, 0,
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console_evtchn, &console_mfn, 0, hvm, pae, superpages,
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0, checkpointed, NULL, 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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