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qga: guest-get-memory-blocks shouldn't fail for unexposed memory blocks

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Some guests don't expose memory blocks via sysfs at all. This
shouldn't be a failure, instead just return an empty list. For
other access failures we still report an error.

Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
This commit is contained in:
Michael Roth 2015-10-19 16:38:25 -05:00
parent 8a0b5421a0
commit f693fe6ef4
1 changed files with 8 additions and 2 deletions
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10
qga/commands-posix.c
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@ -2213,8 +2213,14 @@ GuestMemoryBlockList *qmp_guest_get_memory_blocks(Error **errp)
dp = opendir("/sys/devices/system/memory/");
if (!dp) {
error_setg_errno(errp, errno, "Can't open directory"
"\"/sys/devices/system/memory/\"\n");
/* it's ok if this happens to be a system that doesn't expose
* memory blocks via sysfs, but otherwise we should report
* an error
*/
if (errno != ENOENT) {
error_setg_errno(errp, errno, "Can't open directory"
"\"/sys/devices/system/memory/\"\n");
}
return NULL;
}