At -O2 the function seems to be inlined which makes debugging a bit
harder.
This is the function returning the bad RC, but not only itself but also
most of its callees are inlined virSecurityGetRefCountAttrName
virSecurityGetAttrName virSecurityGetTimestampAttrName.
461 if (virFileGetXAttrQuiet(src, ref_name, &ref_value) < 0) {
(gdb) n
462 if (errno == ENOSYS || errno == ENOTSUP) {
(gdb) p errno
$32 = 38
Which matches ENOSYS
#define ENOSYS 38 /* Function not implemented */
So either DAC (in the apparmor context) doesn't use XATTR either an
fails on still trying (similar to [1] which removed trying to do so for
apparmor) or we have an issue with XATTR in the DAC implementation.
[1]:
https://gitlab.com/libvirt/libvirt/-/commit/cc8c297e473afd55e5d8e35e18345d8df176059d
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https://bugs.launchpad.net/bugs/1879325
Title:
Unable to remove disk metadata on vm
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