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Accepting request 419749 from home:olh:branches:Base:System

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- Detect dom1 via xenfs instead of cpuid to compensate for ABI
  change in xen-4.7 on AMD systems. (bnc#974257)
  biosdevname-dom0.patch

OBS-URL: https://build.opensuse.org/request/show/419749
OBS-URL: https://build.opensuse.org/package/show/Base:System/biosdevname?expand=0&rev=64
This commit is contained in:
Marcus Meissner 2016-08-30 13:50:57 +00:00 committed by Git OBS Bridge
parent 4e41765fe0
commit bfc6057abe
3 changed files with 62 additions and 1 deletions
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52
biosdevname-dom0.patch Normal file
View File

@ -0,0 +1,52 @@
---
src/bios_dev_name.c | 31 +++++++++++++++++++++++++++++++
1 file changed, 31 insertions(+)
--- a/src/bios_dev_name.c
+++ b/src/bios_dev_name.c
@@ -133,6 +133,33 @@ cpuid (u_int32_t eax, u_int32_t ecx)
}
/*
+ Starting with xen-4.7 cpuid will return with the hypervisor bit set
+ on AMD systems. This breaks biosdevname and network interface names.
+ Instead of relying on cpuid check for dom0 in xenfs.
+*/
+static int
+running_in_dom0(void)
+{
+ size_t len = 0;
+#ifdef __x86_64__
+ char buf[16];
+ FILE *f = fopen("/proc/xen/capabilities", "r");
+
+ if (!f)
+ return 0;
+ memset(buf, 0, sizeof(buf));
+ len = fread(&buf, 1, sizeof(buf) - 1, f);
+ fclose(f);
+ while(len && --len && len < sizeof(buf)) {
+ if (buf[len] == '\n')
+ buf[len] = '\0';
+ }
+ len = strcmp("control_d", buf) == 0;
+#endif
+ return len;
+}
+
+/*
Algorithm suggested by:
http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1009458
*/
@@ -144,7 +171,11 @@ running_in_virtual_machine (void)
ecx = cpuid (eax, ecx);
if (ecx & 0x80000000U)
+ {
+ if (running_in_dom0())
+ return 0;
return 1;
+ }
return 0;
}

7
biosdevname.changes
View File

@ -1,3 +1,10 @@
-------------------------------------------------------------------
Tue Aug 16 14:18:06 UTC 2016 - olaf@aepfle.de
- Detect dom0 via xenfs instead of cpuid to compensate for ABI
change in xen-4.7 on AMD systems. (bnc#974257)
biosdevname-dom0.patch
-------------------------------------------------------------------
Fri Mar 4 13:34:44 UTC 2016 - trenn@suse.de

4
biosdevname.spec
View File

@ -1,7 +1,7 @@
#
# spec file for package biosdevname
#
# Copyright (c) 2016 SUSE LINUX Products GmbH, Nuernberg, Germany.
# Copyright (c) 2016 SUSE LINUX GmbH, Nuernberg, Germany.
#
# All modifications and additions to the file contributed by third parties
# remain the property of their copyright owners, unless otherwise agreed
@ -29,6 +29,7 @@ Patch1: ignore-broken-BIOSes
Patch2: whitelist-dell
Patch3: udev-rule-path.patch
Patch4: biosdevname-pic.patch
Patch5: biosdevname-dom0.patch
BuildRequires: automake
# to figure out how to name/location of the rules file
BuildRequires: libudev-devel
@ -67,6 +68,7 @@ You can enable/disable usage of biosdevname with boot option
%patch2 -p1
%patch3 -p1
%patch4 -p1
%patch5 -p1
%build
sed -i -e 's#@@BIOSDEVNAME_RULEDEST@@#'%{_udevrulesdir}'/71-biosdevname.rules#' configure.ac