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From e764e6b0a72f5dae5457178661d88982017ff07d Mon Sep 17 00:00:00 2001
Message-Id: <e764e6b0a72f5dae5457178661d88982017ff07d@dist-git>
From: Peter Krempa <pkrempa@redhat.com>
Date: Mon, 16 Mar 2020 22:12:34 +0100
Subject: [PATCH] RHEL: Enable usage of x-blockdev-reopen
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RHEL-only
Introduce a new capability QEMU_CAPS_BLOCKDEV_REOPEN_COM_REDHAT_AV_8_2_0_API
based on the presence of '__com.redhat_rhel-av-8_2_0-api' feature for
'x-blockdev-reopen' which states that reopen works for what libvirt
is going to use it and wire up code to call the x- prefixed command.
This implementation will become dormant once qemu starts supporting
upstream-stable blockdev-reopen.
https://bugzilla.redhat.com/show_bug.cgi?id=1953939
Message-Id: <098dc0e73e1b561af991f2a9ecf13436dde3b33d.1584391727.git.pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
---
src/qemu/qemu_block.c | 3 ++-
src/qemu/qemu_capabilities.c | 11 +++++++++++
src/qemu/qemu_capabilities.h | 1 +
src/qemu/qemu_monitor.c | 5 +++--
src/qemu/qemu_monitor.h | 3 ++-
src/qemu/qemu_monitor_json.c | 12 +++++++++---
src/qemu/qemu_monitor_json.h | 3 ++-
7 files changed, 30 insertions(+), 8 deletions(-)
diff --git a/src/qemu/qemu_block.c b/src/qemu/qemu_block.c
index 6627d044cd..a531bdd704 100644
--- a/src/qemu/qemu_block.c
+++ b/src/qemu/qemu_block.c
@@ -3317,6 +3317,7 @@ qemuBlockReopenFormat(virDomainObj *vm,
qemuDomainObjPrivate *priv = vm->privateData;
virQEMUDriver *driver = priv->driver;
g_autoptr(virJSONValue) reopenprops = NULL;
+ bool downstream = virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_BLOCKDEV_REOPEN_COM_REDHAT_AV_8_2_0_API);
int rc;
/* If we are lacking the object here, qemu might have opened an image with
@@ -3333,7 +3334,7 @@ qemuBlockReopenFormat(virDomainObj *vm,
if (qemuDomainObjEnterMonitorAsync(driver, vm, asyncJob) < 0)
return -1;
- rc = qemuMonitorBlockdevReopen(priv->mon, &reopenprops);
+ rc = qemuMonitorBlockdevReopen(priv->mon, &reopenprops, downstream);
if (qemuDomainObjExitMonitor(driver, vm) < 0 || rc < 0)
return -1;
diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c
index d1cd8f11ac..c663bf456e 100644
--- a/src/qemu/qemu_capabilities.c
+++ b/src/qemu/qemu_capabilities.c
@@ -636,6 +636,7 @@ VIR_ENUM_IMPL(virQEMUCaps,
/* 405 */
"confidential-guest-support",
"query-display-options",
+ "blockdev-reopen.__com.redhat_rhel-av-8_2_0-api",
);
@@ -1549,6 +1550,7 @@ static struct virQEMUCapsDevicePropsFlags virQEMUCapsDevicePropsVhostUserFS[] =
/* see documentation for virQEMUQAPISchemaPathGet for the query format */
static struct virQEMUCapsStringFlags virQEMUCapsQMPSchemaQueries[] = {
+ { "x-blockdev-reopen/$__com.redhat_rhel-av-8_2_0-api", QEMU_CAPS_BLOCKDEV_REOPEN_COM_REDHAT_AV_8_2_0_API },
{ "blockdev-add/arg-type/options/+gluster/debug-level", QEMU_CAPS_GLUSTER_DEBUG_LEVEL},
{ "blockdev-add/arg-type/+gluster/debug", QEMU_CAPS_GLUSTER_DEBUG_LEVEL},
{ "blockdev-add/arg-type/+vxhs", QEMU_CAPS_VXHS},
@@ -5191,6 +5193,15 @@ virQEMUCapsInitProcessCaps(virQEMUCaps *qemuCaps)
qemuCaps->arch == VIR_ARCH_MIPS)
virQEMUCapsSet(qemuCaps, QEMU_CAPS_SCSI_NCR53C90);
+ /* RHEL-only:
+ * - if upstream blockdev-reopen is enabled, clear the downstream flag
+ * - if the downstream flag is present but not the upstream, assert the upstream flag too
+ */
+ if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_BLOCKDEV_REOPEN))
+ virQEMUCapsClear(qemuCaps, QEMU_CAPS_BLOCKDEV_REOPEN_COM_REDHAT_AV_8_2_0_API);
+ if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_BLOCKDEV_REOPEN_COM_REDHAT_AV_8_2_0_API))
+ virQEMUCapsSet(qemuCaps, QEMU_CAPS_BLOCKDEV_REOPEN);
+
virQEMUCapsInitProcessCapsInterlock(qemuCaps);
}
diff --git a/src/qemu/qemu_capabilities.h b/src/qemu/qemu_capabilities.h
index 7944b9170a..a4792ebd27 100644
--- a/src/qemu/qemu_capabilities.h
+++ b/src/qemu/qemu_capabilities.h
@@ -616,6 +616,7 @@ typedef enum { /* virQEMUCapsFlags grouping marker for syntax-check */
/* 405 */
QEMU_CAPS_MACHINE_CONFIDENTAL_GUEST_SUPPORT, /* -machine confidential-guest-support */
QEMU_CAPS_QUERY_DISPLAY_OPTIONS, /* 'query-display-options' qmp command present */
+ QEMU_CAPS_BLOCKDEV_REOPEN_COM_REDHAT_AV_8_2_0_API, /* downstream support for blockdev reopen in rhel-av-8.2.0 */
QEMU_CAPS_LAST /* this must always be the last item */
} virQEMUCapsFlags;
diff --git a/src/qemu/qemu_monitor.c b/src/qemu/qemu_monitor.c
index 8f35b4240f..14e38a2abc 100644
--- a/src/qemu/qemu_monitor.c
+++ b/src/qemu/qemu_monitor.c
@@ -4458,14 +4458,15 @@ qemuMonitorBlockdevAdd(qemuMonitor *mon,
int
qemuMonitorBlockdevReopen(qemuMonitor *mon,
- virJSONValue **props)
+ virJSONValue **props,
+ bool downstream)
{
VIR_DEBUG("props=%p (node-name=%s)", *props,
NULLSTR(virJSONValueObjectGetString(*props, "node-name")));
QEMU_CHECK_MONITOR(mon);
- return qemuMonitorJSONBlockdevReopen(mon, props);
+ return qemuMonitorJSONBlockdevReopen(mon, props, downstream);
}
diff --git a/src/qemu/qemu_monitor.h b/src/qemu/qemu_monitor.h
index 6a25def78b..14bfbb600e 100644
--- a/src/qemu/qemu_monitor.h
+++ b/src/qemu/qemu_monitor.h
@@ -1371,7 +1371,8 @@ int qemuMonitorBlockdevAdd(qemuMonitor *mon,
virJSONValue **props);
int qemuMonitorBlockdevReopen(qemuMonitor *mon,
- virJSONValue **props);
+ virJSONValue **props,
+ bool downstream);
int qemuMonitorBlockdevDel(qemuMonitor *mon,
const char *nodename);
diff --git a/src/qemu/qemu_monitor_json.c b/src/qemu/qemu_monitor_json.c
index 223777739d..6e7b28c6c7 100644
--- a/src/qemu/qemu_monitor_json.c
+++ b/src/qemu/qemu_monitor_json.c
@@ -8704,13 +8704,19 @@ qemuMonitorJSONBlockdevAdd(qemuMonitor *mon,
int
qemuMonitorJSONBlockdevReopen(qemuMonitor *mon,
- virJSONValue **props)
+ virJSONValue **props,
+ bool downstream)
{
g_autoptr(virJSONValue) cmd = NULL;
g_autoptr(virJSONValue) reply = NULL;
- if (!(cmd = qemuMonitorJSONMakeCommandInternal("blockdev-reopen", props)))
- return -1;
+ if (downstream) {
+ if (!(cmd = qemuMonitorJSONMakeCommandInternal("x-blockdev-reopen", props)))
+ return -1;
+ } else {
+ if (!(cmd = qemuMonitorJSONMakeCommandInternal("blockdev-reopen", props)))
+ return -1;
+ }
if (qemuMonitorJSONCommand(mon, cmd, &reply) < 0)
return -1;
diff --git a/src/qemu/qemu_monitor_json.h b/src/qemu/qemu_monitor_json.h
index 01a3ba25f1..90792c9939 100644
--- a/src/qemu/qemu_monitor_json.h
+++ b/src/qemu/qemu_monitor_json.h
@@ -601,7 +601,8 @@ int qemuMonitorJSONBlockdevAdd(qemuMonitor *mon,
ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2);
int qemuMonitorJSONBlockdevReopen(qemuMonitor *mon,
- virJSONValue **props)
+ virJSONValue **props,
+ bool downstream)
ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2);
int qemuMonitorJSONBlockdevDel(qemuMonitor *mon,
--
2.32.0
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