From 8eaad4cc89e78c25ccca3481741cded0538046b0 Mon Sep 17 00:00:00 2001 Message-Id: <8eaad4cc89e78c25ccca3481741cded0538046b0@dist-git> From: Peter Krempa Date: Wed, 28 Jul 2021 17:37:21 +0200 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=1799013 Starting with libvirt-7.6, upstream has adapted to the new format of arguments so this patch was modified to support blockdev-reopen which takes an array of nodes to reopen. https://bugzilla.redhat.com/show_bug.cgi?id=1929765 Message-Id: <3fcde2fc6add36d5276ae224caf18adc8bca7d48.1627486352.git.pkrempa@redhat.com> Reviewed-by: Ján Tomko --- src/qemu/qemu_block.c | 24 +++++++++++++++--------- src/qemu/qemu_block.h | 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 ++- tests/qemumonitorjsontest.c | 2 +- 9 files changed, 46 insertions(+), 18 deletions(-) diff --git a/src/qemu/qemu_block.c b/src/qemu/qemu_block.c index 4691dff4f7..1f731fff3d 100644 --- a/src/qemu/qemu_block.c +++ b/src/qemu/qemu_block.c @@ -3289,7 +3289,8 @@ qemuBlockBitmapsHandleCommitFinish(virStorageSource *topsrc, int qemuBlockReopenFormatMon(qemuMonitor *mon, - virStorageSource *src) + virStorageSource *src, + bool downstream) { g_autoptr(virJSONValue) reopenprops = NULL; g_autoptr(virJSONValue) srcprops = NULL; @@ -3298,15 +3299,19 @@ qemuBlockReopenFormatMon(qemuMonitor *mon, if (!(srcprops = qemuBlockStorageSourceGetBlockdevProps(src, src->backingStore))) return -1; - if (virJSONValueArrayAppend(reopenoptions, &srcprops) < 0) - return -1; + if (downstream) { + reopenprops = g_steal_pointer(&srcprops); + } else { + if (virJSONValueArrayAppend(reopenoptions, &srcprops) < 0) + return -1; - if (virJSONValueObjectCreate(&reopenprops, - "a:options", &reopenoptions, - NULL) < 0) - return -1; + if (virJSONValueObjectCreate(&reopenprops, + "a:options", &reopenoptions, + NULL) < 0) + return -1; + } - if (qemuMonitorBlockdevReopen(mon, &reopenprops) < 0) + if (qemuMonitorBlockdevReopen(mon, &reopenprops, downstream) < 0) return -1; return 0; @@ -3330,6 +3335,7 @@ qemuBlockReopenFormat(virDomainObj *vm, { qemuDomainObjPrivate *priv = vm->privateData; virQEMUDriver *driver = priv->driver; + 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 @@ -3343,7 +3349,7 @@ qemuBlockReopenFormat(virDomainObj *vm, if (qemuDomainObjEnterMonitorAsync(driver, vm, asyncJob) < 0) return -1; - rc = qemuBlockReopenFormatMon(priv->mon, src); + rc = qemuBlockReopenFormatMon(priv->mon, src, downstream); if (qemuDomainObjExitMonitor(driver, vm) < 0 || rc < 0) return -1; diff --git a/src/qemu/qemu_block.h b/src/qemu/qemu_block.h index 54601a48a9..88fc9974c4 100644 --- a/src/qemu/qemu_block.h +++ b/src/qemu/qemu_block.h @@ -268,7 +268,8 @@ qemuBlockBitmapsHandleCommitFinish(virStorageSource *topsrc, /* only for use in qemumonitorjsontest */ int qemuBlockReopenFormatMon(qemuMonitor *mon, - virStorageSource *src); + virStorageSource *src, + bool downstream); int qemuBlockReopenReadWrite(virDomainObj *vm, diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c index 9558938866..6734ed213d 100644 --- a/src/qemu/qemu_capabilities.c +++ b/src/qemu/qemu_capabilities.c @@ -637,6 +637,7 @@ VIR_ENUM_IMPL(virQEMUCaps, "confidential-guest-support", "query-display-options", "s390-pv-guest", + "blockdev-reopen.__com.redhat_rhel-av-8_2_0-api", ); @@ -1551,6 +1552,7 @@ 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}, @@ -5204,6 +5206,15 @@ 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 2b1bb57a49..def0dd2030 100644 --- a/src/qemu/qemu_capabilities.h +++ b/src/qemu/qemu_capabilities.h @@ -617,6 +617,7 @@ typedef enum { /* virQEMUCapsFlags grouping marker for syntax-check */ QEMU_CAPS_MACHINE_CONFIDENTAL_GUEST_SUPPORT, /* -machine confidential-guest-support */ QEMU_CAPS_QUERY_DISPLAY_OPTIONS, /* 'query-display-options' qmp command present */ QEMU_CAPS_S390_PV_GUEST, /* -object s390-pv-guest,... */ + 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 6e2d8010c5..7ebaa7b099 100644 --- a/src/qemu/qemu_monitor.c +++ b/src/qemu/qemu_monitor.c @@ -4339,14 +4339,15 @@ 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 1491c1297c..5a93447e23 100644 --- a/src/qemu/qemu_monitor.h +++ b/src/qemu/qemu_monitor.h @@ -1366,7 +1366,8 @@ 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 ca2c3bb6cf..8ecd5f3bbd 100644 --- a/src/qemu/qemu_monitor_json.c +++ b/src/qemu/qemu_monitor_json.c @@ -8687,13 +8687,19 @@ 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, diff --git a/tests/qemumonitorjsontest.c b/tests/qemumonitorjsontest.c index 2122d9d999..c20287afee 100644 --- a/tests/qemumonitorjsontest.c +++ b/tests/qemumonitorjsontest.c @@ -2820,7 +2820,7 @@ testQemuMonitorJSONBlockdevReopen(const void *opaque) if (qemuMonitorTestAddItem(test, "blockdev-reopen", "{\"return\":{}}") < 0) return -1; - if (qemuBlockReopenFormatMon(qemuMonitorTestGetMonitor(test), src) < 0) + if (qemuBlockReopenFormatMon(qemuMonitorTestGetMonitor(test), src, false) < 0) return -1; return 0; -- 2.32.0