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qemu: Warn verbosely if using old loader:nvram pairs

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There are two ways for specifying loader:nvram pairs:

  1) --with-loader-nvram configure option
  2) nvram variable in qemu.conf

Since we have FW descriptors, using this old style is
discouraged, but not as strong as one would expect. Produce more
warnings:

  1) produce a warning if somebody tries the configure option
  2) produce a warning if somebody sets nvram variable and at
     least on FW descriptor was found

The reason for producing warning in case 1) is that package
maintainers, who set the configure option in the first place
should start moving towards FW descriptors and abandon the
configure option. After all, the warning is printed into config
output only in this case.

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1763477

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
This commit is contained in:
Michal Privoznik 2019-11-11 17:22:50 +01:00
parent e39d3424e3
commit 75597f022a
3 changed files with 29 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
m4/virt-loader-nvram.m4
View File

@ -30,6 +30,8 @@ AC_DEFUN([LIBVIRT_CHECK_LOADER_NVRAM], [
l=$(echo $with_loader_nvram | tr ':' '\n' | wc -l)
if test $(expr $l % 2) -ne 0 ; then
AC_MSG_ERROR([Malformed --with-loader-nvram argument])
elif test $l -gt 0 ; then
AC_MSG_WARN([Note that --with-loader-nvram is obsolete and will be removed soon])
fi
AC_DEFINE_UNQUOTED([DEFAULT_LOADER_NVRAM], ["$with_loader_nvram"],
[List of loader:nvram pairs])
@ -37,5 +39,11 @@ AC_DEFUN([LIBVIRT_CHECK_LOADER_NVRAM], [
])
AC_DEFUN([LIBVIRT_RESULT_LOADER_NVRAM], [
LIBVIRT_RESULT([Loader/NVRAM], [$with_loader_nvram])
if test "x$with_loader_nvram" != "xno" && \
test "x$with_loader_nvram" != "x" ; then
LIBVIRT_RESULT([Loader/NVRAM], [$with_loader_nvram],
[!!! Using this configure option is strongly discouraged !!!])
else
LIBVIRT_RESULT([Loader/NVRAM], [$with_loader_nvram])
fi
])

3
src/qemu/qemu.conf
View File

@ -761,6 +761,9 @@
# source tree. These metadata files are distributed alongside any
# firmware images intended for use with QEMU.
#
# NOTE: if ANY firmware metadata files are detected, this setting
# will be COMPLETELY IGNORED.
#
# ------------------------------------------
#
# When a domain is configured to use UEFI instead of standard

19
src/qemu/qemu_conf.c
View File

@ -32,6 +32,7 @@
#include "qemu_conf.h"
#include "qemu_capabilities.h"
#include "qemu_domain.h"
#include "qemu_firmware.h"
#include "qemu_security.h"
#include "viruuid.h"
#include "virbuffer.h"
@ -799,7 +800,8 @@ virQEMUDriverConfigLoadLogEntry(virQEMUDriverConfigPtr cfg,
static int
virQEMUDriverConfigLoadNVRAMEntry(virQEMUDriverConfigPtr cfg,
virConfPtr conf)
virConfPtr conf,
bool privileged)
{
VIR_AUTOSTRINGLIST nvram = NULL;
size_t i;
@ -807,8 +809,21 @@ virQEMUDriverConfigLoadNVRAMEntry(virQEMUDriverConfigPtr cfg,
if (virConfGetValueStringList(conf, "nvram", false, &nvram) < 0)
return -1;
if (nvram) {
VIR_AUTOSTRINGLIST fwList = NULL;
virFirmwareFreeList(cfg->firmwares, cfg->nfirmwares);
if (qemuFirmwareFetchConfigs(&fwList, privileged) < 0)
return -1;
if (fwList) {
VIR_WARN("Obsolete nvram variable is set while firmware metadata "
"files found. Note that the nvram config file variable is "
"going to be ignored.");
cfg->nfirmwares = 0;
return 0;
}
cfg->nfirmwares = virStringListLength((const char *const *)nvram);
if (nvram[0] && VIR_ALLOC_N(cfg->firmwares, cfg->nfirmwares) < 0)
return -1;
@ -1041,7 +1056,7 @@ int virQEMUDriverConfigLoadFile(virQEMUDriverConfigPtr cfg,
if (virQEMUDriverConfigLoadLogEntry(cfg, conf) < 0)
return -1;
if (virQEMUDriverConfigLoadNVRAMEntry(cfg, conf) < 0)
if (virQEMUDriverConfigLoadNVRAMEntry(cfg, conf, privileged) < 0)
return -1;
if (virQEMUDriverConfigLoadGlusterDebugEntry(cfg, conf) < 0)