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DISK: Add better error reporting when differencing VHD attach fails

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This commit is contained in:
Mark Pizzolato 2016-11-21 21:30:46 -08:00
parent 0a12499a44
commit df80f22152
1 changed files with 30 additions and 14 deletions
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44
sim_disk.c
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@ -1040,6 +1040,8 @@ else
switch (DK_GET_FMT (uptr)) { /* case on format */
case DKUF_F_STD: /* SIMH format */
if (NULL == (uptr->fileref = sim_vhd_disk_open (cptr, "rb"))) {
if (errno == EINVAL) /* VHD but broken */
return SCPE_OPENERR;
open_function = sim_fopen;
size_function = sim_fsize_ex;
break;
@ -2881,24 +2883,38 @@ if ((sDynamic) &&
strncpy (CheckPath+strlen(CheckPath), ParentName, sizeof (CheckPath)-(strlen (CheckPath)+1));
}
VhdPathToHostPath (CheckPath, CheckPath, sizeof (CheckPath));
if ((0 == GetVHDFooter(CheckPath,
&sParentFooter,
NULL,
NULL,
&ParentModificationTime,
NULL,
0)) &&
(0 == memcmp (sDynamic->ParentUniqueID, sParentFooter.UniqueID, sizeof (sParentFooter.UniqueID))) &&
((sDynamic->ParentTimeStamp == ParentModificationTime) ||
((NtoHl(sDynamic->ParentTimeStamp)-NtoHl(ParentModificationTime)) == 3600) ||
(sim_switches & SWMASK ('O')))) {
strncpy (szParentVHDPath, CheckPath, ParentVHDPathSize);
if (0 == GetVHDFooter(CheckPath,
&sParentFooter,
NULL,
NULL,
&ParentModificationTime,
NULL,
0)) {
if ((0 == memcmp (sDynamic->ParentUniqueID, sParentFooter.UniqueID, sizeof (sParentFooter.UniqueID))) &&
((sDynamic->ParentTimeStamp == ParentModificationTime) ||
((NtoHl(sDynamic->ParentTimeStamp)-NtoHl(ParentModificationTime)) == 3600) ||
(sim_switches & SWMASK ('O'))))
strncpy (szParentVHDPath, CheckPath, ParentVHDPathSize);
else {
sim_printf ("Error Invalid Parent VHD '%s' for Differencing VHD: %s\n", CheckPath, szVHDPath);
Return = EINVAL; /* File Corrupt/Invalid */
}
break;
}
else {
struct stat statb;
if (0 == stat (CheckPath, &statb)) {
sim_printf ("Parent VHD '%s' corrupt for Differencing VHD: %s\n", CheckPath, szVHDPath);
Return = EINVAL; /* File Corrupt/Invalid */
break;
}
}
}
if (!*szParentVHDPath) {
Return = EINVAL; /* File Corrupt */
sim_printf ("Error Invalid Parent VHD for Differencing VHD\n");
if (Return != EINVAL) /* File Not Corrupt? */
sim_printf ("Missing Parent VHD for Differencing VHD: %s\n", szVHDPath);
Return = EINVAL;
}
}
}