qemu-kvm/0004-Initial-redhat-build.patch

From 91262ecfbd218a95dab8491e4226674f79debf5a Mon Sep 17 00:00:00 2001
From: Miroslav Rezanina <mrezanin@redhat.com>
Date: Wed, 26 May 2021 10:56:02 +0200
Subject: Initial redhat build

This patch introduces redhat build structure in redhat subdirectory. In addition,
several issues are fixed in QEMU tree:

- Change of app name for sasl_server_init in VNC code from qemu to qemu-kvm
 - As we use qemu-kvm as name in all places, this is updated to be consistent
- Man page renamed from qemu to qemu-kvm
 - man page is installed using make install so we have to fix it in qemu tree

We disable make check due to issues with some of the tests.

Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
---
 .distro/Makefile                        |  101 ++
 .distro/Makefile.common                 |   42 +
 .distro/README.tests                    |   39 +
 .distro/modules-load.conf               |    4 +
 .distro/qemu-guest-agent.service        |    1 -
 .distro/qemu-kvm.spec.template          | 1250 +++++++++++++++++++++++
 .distro/rpminspect.yaml                 |    6 +-
 .distro/scripts/extract_build_cmd.py    |   12 +
 .distro/scripts/frh.py                  |    4 +-
 .distro/scripts/process-patches.sh      |    4 +
 .gitignore                              |    1 +
 README.systemtap                        |   43 +
 scripts/qemu-guest-agent/fsfreeze-hook  |    2 +-
 scripts/systemtap/conf.d/qemu_kvm.conf  |    4 +
 scripts/systemtap/script.d/qemu_kvm.stp |    1 +
 ui/vnc-auth-sasl.c                      |    2 +-
 16 files changed, 1510 insertions(+), 6 deletions(-)
 create mode 100644 .distro/Makefile
 create mode 100644 .distro/Makefile.common
 create mode 100644 .distro/README.tests
 create mode 100644 .distro/modules-load.conf
 create mode 100644 .distro/qemu-kvm.spec.template
 create mode 100644 README.systemtap
 create mode 100644 scripts/systemtap/conf.d/qemu_kvm.conf
 create mode 100644 scripts/systemtap/script.d/qemu_kvm.stp

diff --git a/README.systemtap b/README.systemtap
new file mode 100644
index 0000000000..ad913fc990
--- /dev/null
+++ b/README.systemtap
@@ -0,0 +1,43 @@
+QEMU tracing using systemtap-initscript
+---------------------------------------
+
+You can capture QEMU trace data all the time using systemtap-initscript.  This
+uses SystemTap's flight recorder mode to trace all running guests to a
+fixed-size buffer on the host.  Old trace entries are overwritten by new
+entries when the buffer size wraps.
+
+1. Install the systemtap-initscript package:
+  # yum install systemtap-initscript
+
+2. Install the systemtap scripts and the conf file:
+  # cp /usr/share/qemu-kvm/systemtap/script.d/qemu_kvm.stp /etc/systemtap/script.d/
+  # cp /usr/share/qemu-kvm/systemtap/conf.d/qemu_kvm.conf /etc/systemtap/conf.d/
+
+The set of trace events to enable is given in qemu_kvm.stp.  This SystemTap
+script can be customized to add or remove trace events provided in
+/usr/share/systemtap/tapset/qemu-kvm-simpletrace.stp.
+
+SystemTap customizations can be made to qemu_kvm.conf to control the flight
+recorder buffer size and whether to store traces in memory only or disk too.
+See stap(1) for option documentation.
+
+3. Start the systemtap service.
+　# service systemtap start qemu_kvm
+
+4. Make the service start at boot time.
+　# chkconfig systemtap on
+
+5. Confirm that the service works.
+  # service systemtap status qemu_kvm
+  qemu_kvm is running...
+
+When you want to inspect the trace buffer, perform the following steps:
+
+1. Dump the trace buffer.
+  # staprun -A qemu_kvm >/tmp/trace.log
+
+2. Start the systemtap service because the preceding step stops the service.
+  # service systemtap start qemu_kvm
+
+3. Translate the trace record to readable format.
+  # /usr/share/qemu-kvm/simpletrace.py --no-header /usr/share/qemu-kvm/trace-events /tmp/trace.log
diff --git a/scripts/qemu-guest-agent/fsfreeze-hook b/scripts/qemu-guest-agent/fsfreeze-hook
index 13aafd4845..e9b84ec028 100755
--- a/scripts/qemu-guest-agent/fsfreeze-hook
+++ b/scripts/qemu-guest-agent/fsfreeze-hook
@@ -8,7 +8,7 @@
 # request, it is issued with "thaw" argument after filesystem is thawed.
 
 LOGFILE=/var/log/qga-fsfreeze-hook.log
-FSFREEZE_D=$(dirname -- "$0")/fsfreeze-hook.d
+FSFREEZE_D=$(dirname -- "$(realpath $0)")/fsfreeze-hook.d
 
 # Check whether file $1 is a backup or rpm-generated file and should be ignored
 is_ignored_file() {
diff --git a/scripts/systemtap/conf.d/qemu_kvm.conf b/scripts/systemtap/conf.d/qemu_kvm.conf
new file mode 100644
index 0000000000..372d8160a4
--- /dev/null
+++ b/scripts/systemtap/conf.d/qemu_kvm.conf
@@ -0,0 +1,4 @@
+# Force load uprobes (see BZ#1118352)
+stap -e 'probe process("/usr/libexec/qemu-kvm").function("main") { printf("") }' -c true
+
+qemu_kvm_OPT="-s4" # per-CPU buffer size, in megabytes
diff --git a/scripts/systemtap/script.d/qemu_kvm.stp b/scripts/systemtap/script.d/qemu_kvm.stp
new file mode 100644
index 0000000000..c04abf9449
--- /dev/null
+++ b/scripts/systemtap/script.d/qemu_kvm.stp
@@ -0,0 +1 @@
+probe qemu.kvm.simpletrace.handle_qmp_command,qemu.kvm.simpletrace.monitor_protocol_*,qemu.kvm.simpletrace.migrate_set_state {}
diff --git a/ui/vnc-auth-sasl.c b/ui/vnc-auth-sasl.c
index 47fdae5b21..2a950caa2a 100644
--- a/ui/vnc-auth-sasl.c
+++ b/ui/vnc-auth-sasl.c
@@ -42,7 +42,7 @@
 
 bool vnc_sasl_server_init(Error **errp)
 {
-    int saslErr = sasl_server_init(NULL, "qemu");
+    int saslErr = sasl_server_init(NULL, "qemu-kvm");
 
     if (saslErr != SASL_OK) {
         error_setg(errp, "Failed to initialize SASL auth: %s",
-- 
2.39.3