From a6af039d4a7810cbc4f00018acc7a7fa0b8d304e Mon Sep 17 00:00:00 2001 Message-Id: From: Jiri Denemark Date: Fri, 16 Aug 2019 14:52:29 +0200 Subject: [PATCH] qemu: Pass qemuCaps to qemuDomainSaveImageOpen MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Since qemuDomainDefPostParse callback requires qemuCaps, we need to make sure it gets the capabilities stored in the domain's private data if the domain is running. Passing NULL may cause QEMU capabilities probing to be triggered in case QEMU binary changed in the meantime. When this happens while a running domain object is locked, QMP event delivered to the domain before QEMU capabilities probing finishes will deadlock the event loop. This patch fixes all paths leading to qemuDomainSaveImageOpen. Signed-off-by: Jiri Denemark Reviewed-by: Michal Privoznik (cherry picked from commit fd60aefec7f49d1053efdd5119db494bb474aeec) https://bugzilla.redhat.com/show_bug.cgi?id=1731783 Signed-off-by: Jiri Denemark Message-Id: <6206f14c127037e0822fb6c1e04e8f2d8e6069ce.1565959866.git.jdenemar@redhat.com> Reviewed-by: Ján Tomko --- src/qemu/qemu_driver.c | 14 ++++++++------ 1 file changed, 8 insertions(+), 6 deletions(-) diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c index 7d87215904..04915798ab 100644 --- a/src/qemu/qemu_driver.c +++ b/src/qemu/qemu_driver.c @@ -6368,6 +6368,7 @@ qemuDomainSaveImageUpdateDef(virQEMUDriverPtr driver, /** * qemuDomainSaveImageOpen: * @driver: qemu driver data + * @qemuCaps: pointer to qemuCaps if the domain is running or NULL * @path: path of the save image * @ret_def: returns domain definition created from the XML stored in the image * @ret_data: returns structure filled with data from the image header @@ -6382,6 +6383,7 @@ qemuDomainSaveImageUpdateDef(virQEMUDriverPtr driver, */ static int ATTRIBUTE_NONNULL(3) ATTRIBUTE_NONNULL(4) qemuDomainSaveImageOpen(virQEMUDriverPtr driver, + virQEMUCapsPtr qemuCaps, const char *path, virDomainDefPtr *ret_def, virQEMUSaveDataPtr *ret_data, @@ -6506,7 +6508,7 @@ qemuDomainSaveImageOpen(virQEMUDriverPtr driver, } /* Create a domain from this XML */ - if (!(def = virDomainDefParseString(data->xml, caps, driver->xmlopt, NULL, + if (!(def = virDomainDefParseString(data->xml, caps, driver->xmlopt, qemuCaps, VIR_DOMAIN_DEF_PARSE_INACTIVE | VIR_DOMAIN_DEF_PARSE_SKIP_VALIDATE))) goto error; @@ -6681,7 +6683,7 @@ qemuDomainRestoreFlags(virConnectPtr conn, virNWFilterReadLockFilterUpdates(); - fd = qemuDomainSaveImageOpen(driver, path, &def, &data, + fd = qemuDomainSaveImageOpen(driver, NULL, path, &def, &data, (flags & VIR_DOMAIN_SAVE_BYPASS_CACHE) != 0, &wrapperFd, false, false); if (fd < 0) @@ -6779,7 +6781,7 @@ qemuDomainSaveImageGetXMLDesc(virConnectPtr conn, const char *path, /* We only take subset of virDomainDefFormat flags. */ virCheckFlags(VIR_DOMAIN_XML_SECURE, NULL); - fd = qemuDomainSaveImageOpen(driver, path, &def, &data, + fd = qemuDomainSaveImageOpen(driver, NULL, path, &def, &data, false, NULL, false, false); if (fd < 0) @@ -6817,7 +6819,7 @@ qemuDomainSaveImageDefineXML(virConnectPtr conn, const char *path, else if (flags & VIR_DOMAIN_SAVE_PAUSED) state = 0; - fd = qemuDomainSaveImageOpen(driver, path, &def, &data, + fd = qemuDomainSaveImageOpen(driver, NULL, path, &def, &data, false, NULL, true, false); if (fd < 0) @@ -6902,7 +6904,7 @@ qemuDomainManagedSaveGetXMLDesc(virDomainPtr dom, unsigned int flags) goto cleanup; } - if ((fd = qemuDomainSaveImageOpen(driver, path, &def, &data, + if ((fd = qemuDomainSaveImageOpen(driver, priv->qemuCaps, path, &def, &data, false, NULL, false, false)) < 0) goto cleanup; @@ -6969,7 +6971,7 @@ qemuDomainObjRestore(virConnectPtr conn, virQEMUSaveDataPtr data = NULL; virFileWrapperFdPtr wrapperFd = NULL; - fd = qemuDomainSaveImageOpen(driver, path, &def, &data, + fd = qemuDomainSaveImageOpen(driver, NULL, path, &def, &data, bypass_cache, &wrapperFd, false, true); if (fd < 0) { if (fd == -3) -- 2.22.1