April 2012 - Devel - libvirt List Archives

[libvirt] [PATCH v2] qemu_agent: Report error class at least
by Michal Privoznik 28 Apr '12

28 Apr '12

Currently, qemu GA is not providing 'desc' field for errors like we are used to from qemu monitor. Therefore, we fall back to this general 'unknown error' string. However, GA is reporting 'class' which is not perfect, but much more helpful than generic error string. Thus we should fall back to class firstly and if even no class is presented, then we can fall back to that generic string. Before this patch: virsh # dompmsuspend --target mem f16 error: Domain f16 could not be suspended error: internal error unable to execute QEMU command 'guest-suspend-ram': unknown QEMU command error After this patch: virsh # dompmsuspend --target mem f16 error: Domain f16 could not be suspended error: internal error unable to execute QEMU command 'guest-suspend-ram': The command has not been found --- src/qemu/qemu_agent.c | 37 +++++++++++++++++++++++++++++++++++-- 1 files changed, 35 insertions(+), 2 deletions(-) diff --git a/src/qemu/qemu_agent.c b/src/qemu/qemu_agent.c index b759b7f..bc4ceff 100644 --- a/src/qemu/qemu_agent.c +++ b/src/qemu/qemu_agent.c @@ -1025,6 +1025,40 @@ cleanup: return ret; } +static const char * +qemuAgentStringifyErrorClass(const char *klass) +{ + if (STREQ_NULLABLE(klass, "BufferOverrun")) + return "Buffer overrun"; + else if (STREQ_NULLABLE(klass, "CommandDisabled")) + return "The command has been disabled for this instance"; + else if (STREQ_NULLABLE(klass, "CommandNotFound")) + return "The command has not been found"; + else if (STREQ_NULLABLE(klass, "FdNotFound")) + return "File descriptor not found"; + else if (STREQ_NULLABLE(klass, "InvalidParameter")) + return "Invalid parameter"; + else if (STREQ_NULLABLE(klass, "InvalidParameterType")) + return "Invalid parameter type"; + else if (STREQ_NULLABLE(klass, "InvalidParameterValue")) + return "Invalid parameter value"; + else if (STREQ_NULLABLE(klass, "OpenFileFailed")) + return "Cannot open file"; + else if (STREQ_NULLABLE(klass, "QgaCommandFailed")) + return "Guest agent command failed"; + else if (STREQ_NULLABLE(klass, "QMPBadInputObjectMember")) + return "Bad QMP input object member"; + else if (STREQ_NULLABLE(klass, "QMPExtraInputObjectMember")) + return "Unexpected extra object member"; + else if (STREQ_NULLABLE(klass, "UndefinedError")) + return "An undefined error has occurred"; + else if (STREQ_NULLABLE(klass, "Unsupported")) + return "this feature or command is not currently supported"; + else if (klass) + return klass; + else + return "unknown QEMU command error"; +} /* Ignoring OOM in this method, since we're already reporting * a more important error @@ -1043,9 +1077,8 @@ qemuAgentStringifyError(virJSONValuePtr error) if (klass) detail = virJSONValueObjectGetString(error, "desc"); - if (!detail) - detail = "unknown QEMU command error"; + detail = qemuAgentStringifyErrorClass(klass); return detail; } -- 1.7.8.5

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[libvirt] [PATCH] More coverity findings addressed
by Stefan Berger 28 Apr '12

28 Apr '12

More bug extermination in the category of: Error: CHECKED_RETURN: /libvirt/src/conf/network_conf.c:595: check_return: Calling function "virAsprintf" without checking return value (as is done elsewhere 515 out of 543 times). /libvirt/src/qemu/qemu_process.c:2780: unchecked_value: No check of the return value of "virAsprintf(&msg, "was paused (%s)", virDomainPausedReasonTypeToString(reason))". /libvirt/tests/commandtest.c:809: check_return: Calling function "setsid" without checking return value (as is done elsewhere 4 out of 5 times). /libvirt/tests/commandtest.c:830: unchecked_value: No check of the return value of "virTestGetDebug()". /libvirt/tests/commandtest.c:831: check_return: Calling function "virTestGetVerbose" without checking return value (as is done elsewhere 41 out of 42 times). /libvirt/tests/commandtest.c:833: check_return: Calling function "virInitialize" without checking return value (as is done elsewhere 18 out of 21 times). One note about the error in commandtest line 809: setsid() seems to fail when running the test -- could be removed ? --- src/conf/network_conf.c | 7 ++----- src/qemu/qemu_process.c | 4 ++-- tests/commandtest.c | 9 +++++---- 3 files changed, 9 insertions(+), 11 deletions(-) Index: libvirt-acl/src/conf/network_conf.c =================================================================== --- libvirt-acl.orig/src/conf/network_conf.c +++ libvirt-acl/src/conf/network_conf.c @@ -590,12 +590,9 @@ virNetworkDNSSrvDefParseXML(virNetworkDN } if (strlen(service) > DNS_RECORD_LENGTH_SRV) { - char *name = NULL; - - virAsprintf(&name, _("Service name is too long, limit is %d bytes"), DNS_RECORD_LENGTH_SRV); virNetworkReportError(VIR_ERR_XML_DETAIL, - "%s", name); - VIR_FREE(name); + _("Service name is too long, limit is %d bytes"), + DNS_RECORD_LENGTH_SRV); goto error; } Index: libvirt-acl/src/qemu/qemu_process.c =================================================================== --- libvirt-acl.orig/src/qemu/qemu_process.c +++ libvirt-acl/src/qemu/qemu_process.c @@ -2777,8 +2777,8 @@ qemuProcessUpdateState(struct qemud_driv } else { newState = VIR_DOMAIN_PAUSED; newReason = reason; - virAsprintf(&msg, "was paused (%s)", - virDomainPausedReasonTypeToString(reason)); + ignore_value(virAsprintf(&msg, "was paused (%s)", + virDomainPausedReasonTypeToString(reason))); } } else if (state == VIR_DOMAIN_SHUTOFF && running) { newState = VIR_DOMAIN_RUNNING; Index: libvirt-acl/tests/commandtest.c =================================================================== --- libvirt-acl.orig/tests/commandtest.c +++ libvirt-acl/tests/commandtest.c @@ -806,7 +806,7 @@ mymain(void) return EXIT_FAILURE; setpgid(0, 0); - setsid(); + ignore_value(setsid()); /* Our test expects particular fd values; to get that, we must not * leak fds that we inherited from a lazy parent. At the same @@ -827,10 +827,11 @@ mymain(void) /* Prime the debug/verbose settings from the env vars, * since we're about to reset 'environ' */ - virTestGetDebug(); - virTestGetVerbose(); + ignore_value(virTestGetDebug()); + ignore_value(virTestGetVerbose()); - virInitialize(); + if (virInitialize() < 0) + return EXIT_FAILURE; /* Phase two of killing interfering fds; see above. */ fd = 3;

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[libvirt] [PATCHv2] blockjob: fix block-stream bandwidth race
by Eric Blake 27 Apr '12

27 Apr '12

With RHEL 6.2, virDomainBlockPull(dom, dev, bandwidth, 0) has a race with non-zero bandwidth: there is a window between the block_stream and block_job_set_speed monitor commands where an unlimited amount of data was let through, defeating the point of a throttle. This race was first identified in commit a9d3495e, and libvirt was able to reduce the size of the window for that race. In the meantime, the qemu developers decided to fix things properly; per this message: https://lists.gnu.org/archive/html/qemu-devel/2012-04/msg03793.html the fix will be in qemu 1.1, and changes block-job-set-speed to use a different parameter name, as well as adding a new optional parameter to block-stream, which eliminates the race altogether. Since our documentation already mentioned that we can refuse a non-zero bandwidth for some hypervisors, I think the best solution is to do just that for RHEL 6.2 qemu, so that the race is obvious to the user (anyone using stock RHEL 6.2 binaries won't have this patch, and anyone building their own libvirt with this patch for RHEL can also rebuild qemu to get the modern semantics, so it is no real loss in behavior). Meanwhile the code must be fixed to honor actual qemu 1.1 naming. Rename the parameter to 'modern', since the naming difference now covers more than just 'async' block-job-cancel. And while at it, fix an unchecked integer overflow. * src/qemu/qemu_monitor.h (enum BLOCK_JOB_CMD): Drop unused value, rename enum to match conventions. * src/qemu/qemu_monitor.c (qemuMonitorBlockJob): Reflect enum rename. * src/qemu_qemu_monitor_json.h (qemuMonitorJSONBlockJob): Likewise. * src/qemu/qemu_monitor_json.c (qemuMonitorJSONBlockJob): Likewise, and support difference between RHEL 6.2 and qemu 1.1 block pull. * src/qemu/qemu_driver.c (qemuDomainBlockJobImpl): Reject bandwidth during pull with too-old qemu. * src/libvirt.c (virDomainBlockPull, virDomainBlockRebase): Document this. --- v2: fix integer overflow, improve variable naming src/libvirt.c | 8 ++++- src/qemu/qemu_driver.c | 8 +++-- src/qemu/qemu_monitor.c | 25 +++++++++++++----- src/qemu/qemu_monitor.h | 15 +++++----- src/qemu/qemu_monitor_json.c | 59 +++++++++++++++++++++++------------------ src/qemu/qemu_monitor_json.h | 6 ++-- 6 files changed, 72 insertions(+), 49 deletions(-) diff --git a/src/libvirt.c b/src/libvirt.c index b01ebba..cfd7711 100644 --- a/src/libvirt.c +++ b/src/libvirt.c @@ -18145,7 +18145,9 @@ error: * The maximum bandwidth (in Mbps) that will be used to do the copy can be * specified with the bandwidth parameter. If set to 0, libvirt will choose a * suitable default. Some hypervisors do not support this feature and will - * return an error if bandwidth is not 0. + * return an error if bandwidth is not 0; in this case, it might still be + * possible for a later call to virDomainBlockJobSetSpeed() to succeed. + * The actual speed can be determined with virDomainGetBlockJobInfo(). * * This is shorthand for virDomainBlockRebase() with a NULL base. * @@ -18263,7 +18265,9 @@ error: * The maximum bandwidth (in Mbps) that will be used to do the copy can be * specified with the bandwidth parameter. If set to 0, libvirt will choose a * suitable default. Some hypervisors do not support this feature and will - * return an error if bandwidth is not 0. + * return an error if bandwidth is not 0; in this case, it might still be + * possible for a later call to virDomainBlockJobSetSpeed() to succeed. + * The actual speed can be determined with virDomainGetBlockJobInfo(). * * When @base is NULL and @flags is 0, this is identical to * virDomainBlockPull(). diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c index c3555ca..d3aa34d 100644 --- a/src/qemu/qemu_driver.c +++ b/src/qemu/qemu_driver.c @@ -11654,6 +11654,11 @@ qemuDomainBlockJobImpl(virDomainPtr dom, const char *path, const char *base, _("partial block pull not supported with this " "QEMU binary")); goto cleanup; + } else if (mode == BLOCK_JOB_PULL && bandwidth) { + qemuReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", + _("setting bandwidth at start of block pull not " + "supported with this QEMU binary")); + goto cleanup; } device = qemuDiskPathToAlias(vm, path, &idx); @@ -11676,9 +11681,6 @@ qemuDomainBlockJobImpl(virDomainPtr dom, const char *path, const char *base, * relying on qemu to do this. */ ret = qemuMonitorBlockJob(priv->mon, device, base, bandwidth, info, mode, async); - if (ret == 0 && mode == BLOCK_JOB_PULL && bandwidth) - ret = qemuMonitorBlockJob(priv->mon, device, NULL, bandwidth, NULL, - BLOCK_JOB_SPEED_INTERNAL, async); qemuDomainObjExitMonitorWithDriver(driver, vm); if (ret < 0) goto endjob; diff --git a/src/qemu/qemu_monitor.c b/src/qemu/qemu_monitor.c index 2f66c46..ca1c7aa 100644 --- a/src/qemu/qemu_monitor.c +++ b/src/qemu/qemu_monitor.c @@ -2768,23 +2768,34 @@ int qemuMonitorScreendump(qemuMonitorPtr mon, return ret; } +/* bandwidth is in MB/sec */ int qemuMonitorBlockJob(qemuMonitorPtr mon, const char *device, const char *base, unsigned long bandwidth, virDomainBlockJobInfoPtr info, - int mode, - bool async) + qemuMonitorBlockJobCmd mode, + bool modern) { int ret = -1; + unsigned long long speed; - VIR_DEBUG("mon=%p, device=%s, base=%s, bandwidth=%lu, info=%p, mode=%o, " - "async=%d", mon, device, NULLSTR(base), bandwidth, info, mode, - async); + VIR_DEBUG("mon=%p, device=%s, base=%s, bandwidth=%luM, info=%p, mode=%o, " + "modern=%d", mon, device, NULLSTR(base), bandwidth, info, mode, + modern); + + /* Convert bandwidth MiB to bytes */ + if (bandwidth > ULLONG_MAX / 1024 / 1024) { + qemuReportError(VIR_ERR_OVERFLOW, + _("bandwidth must be less than %llu"), + ULLONG_MAX / 1024 / 1024); + return -1; + } + speed = bandwidth * 1024ULL * 1024ULL; if (mon->json) - ret = qemuMonitorJSONBlockJob(mon, device, base, bandwidth, info, mode, - async); + ret = qemuMonitorJSONBlockJob(mon, device, base, speed, info, mode, + modern); else qemuReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", _("block jobs require JSON monitor")); diff --git a/src/qemu/qemu_monitor.h b/src/qemu/qemu_monitor.h index f3cdcdd..ffe8fe7 100644 --- a/src/qemu/qemu_monitor.h +++ b/src/qemu/qemu_monitor.h @@ -527,20 +527,19 @@ int qemuMonitorSendKey(qemuMonitorPtr mon, unsigned int nkeycodes); typedef enum { - BLOCK_JOB_ABORT = 0, - BLOCK_JOB_INFO = 1, - BLOCK_JOB_SPEED = 2, - BLOCK_JOB_SPEED_INTERNAL = 3, - BLOCK_JOB_PULL = 4, -} BLOCK_JOB_CMD; + BLOCK_JOB_ABORT, + BLOCK_JOB_INFO, + BLOCK_JOB_SPEED, + BLOCK_JOB_PULL, +} qemuMonitorBlockJobCmd; int qemuMonitorBlockJob(qemuMonitorPtr mon, const char *device, const char *back, unsigned long bandwidth, virDomainBlockJobInfoPtr info, - int mode, - bool async) + qemuMonitorBlockJobCmd mode, + bool modern) ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2); int qemuMonitorOpenGraphics(qemuMonitorPtr mon, diff --git a/src/qemu/qemu_monitor_json.c b/src/qemu/qemu_monitor_json.c index eb58f13..e1f5453 100644 --- a/src/qemu/qemu_monitor_json.c +++ b/src/qemu/qemu_monitor_json.c @@ -3423,29 +3423,36 @@ static int qemuMonitorJSONGetBlockJobInfo(virJSONValuePtr reply, } +/* speed is in bytes/sec */ int qemuMonitorJSONBlockJob(qemuMonitorPtr mon, const char *device, const char *base, - unsigned long bandwidth, + unsigned long long speed, virDomainBlockJobInfoPtr info, - int mode, - bool async) + qemuMonitorBlockJobCmd mode, + bool modern) { int ret = -1; virJSONValuePtr cmd = NULL; virJSONValuePtr reply = NULL; const char *cmd_name = NULL; - if (base && (mode != BLOCK_JOB_PULL || !async)) { + if (base && (mode != BLOCK_JOB_PULL || !modern)) { qemuReportError(VIR_ERR_INTERNAL_ERROR, _("only modern block pull supports base: %s"), base); return -1; } + if (speed && mode == BLOCK_JOB_PULL && !modern) { + qemuReportError(VIR_ERR_INTERNAL_ERROR, + _("only modern block pull supports speed: %llu"), + speed); + return -1; + } - switch ((BLOCK_JOB_CMD) mode) { + switch (mode) { case BLOCK_JOB_ABORT: - cmd_name = async ? "block-job-cancel" : "block_job_cancel"; + cmd_name = modern ? "block-job-cancel" : "block_job_cancel"; cmd = qemuMonitorJSONMakeCommand(cmd_name, "s:device", device, NULL); break; case BLOCK_JOB_INFO: @@ -3453,19 +3460,24 @@ qemuMonitorJSONBlockJob(qemuMonitorPtr mon, cmd = qemuMonitorJSONMakeCommand(cmd_name, NULL); break; case BLOCK_JOB_SPEED: - case BLOCK_JOB_SPEED_INTERNAL: - cmd_name = async ? "block-job-set-speed" : "block_job_set_speed"; - cmd = qemuMonitorJSONMakeCommand(cmd_name, "s:device", - device, "U:value", - bandwidth * 1024ULL * 1024ULL, - NULL); + cmd_name = modern ? "block-job-set-speed" : "block_job_set_speed"; + cmd = qemuMonitorJSONMakeCommand(cmd_name, "s:device", device, + modern ? "U:speed" : "U:value", + speed, NULL); break; case BLOCK_JOB_PULL: - cmd_name = async ? "block-stream" : "block_stream"; - cmd = qemuMonitorJSONMakeCommand(cmd_name, - "s:device", device, - base ? "s:base" : NULL, base, - NULL); + cmd_name = modern ? "block-stream" : "block_stream"; + if (speed) + cmd = qemuMonitorJSONMakeCommand(cmd_name, + "s:device", device, + "U:speed", speed, + base ? "s:base" : NULL, base, + NULL); + else + cmd = qemuMonitorJSONMakeCommand(cmd_name, + "s:device", device, + base ? "s:base" : NULL, base, + NULL); break; } @@ -3477,14 +3489,9 @@ qemuMonitorJSONBlockJob(qemuMonitorPtr mon, if (ret == 0 && virJSONValueObjectHasKey(reply, "error")) { ret = -1; if (qemuMonitorJSONHasError(reply, "DeviceNotActive")) { - /* If a job completes before we get a chance to set the - * speed, we don't want to fail the original command. */ - if (mode == BLOCK_JOB_SPEED_INTERNAL) - ret = 0; - else - qemuReportError(VIR_ERR_OPERATION_INVALID, - _("No active operation on device: %s"), - device); + qemuReportError(VIR_ERR_OPERATION_INVALID, + _("No active operation on device: %s"), + device); } else if (qemuMonitorJSONHasError(reply, "DeviceInUse")){ qemuReportError(VIR_ERR_OPERATION_FAILED, _("Device %s in use"), device); @@ -3497,7 +3504,7 @@ qemuMonitorJSONBlockJob(qemuMonitorPtr mon, _("Command '%s' is not found"), cmd_name); } else { qemuReportError(VIR_ERR_INTERNAL_ERROR, "%s", - _("Unexpected error")); + _("Unexpected error")); } } diff --git a/src/qemu/qemu_monitor_json.h b/src/qemu/qemu_monitor_json.h index aacbb5f..22a3adf 100644 --- a/src/qemu/qemu_monitor_json.h +++ b/src/qemu/qemu_monitor_json.h @@ -251,10 +251,10 @@ int qemuMonitorJSONScreendump(qemuMonitorPtr mon, int qemuMonitorJSONBlockJob(qemuMonitorPtr mon, const char *device, const char *base, - unsigned long bandwidth, + unsigned long long speed, virDomainBlockJobInfoPtr info, - int mode, - bool async) + qemuMonitorBlockJobCmd mode, + bool modern) ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2); int qemuMonitorJSONSetLink(qemuMonitorPtr mon, -- 1.7.7.6

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[libvirt] [PATCH] python: Fix doc directory name for stable releases
by Cole Robinson 27 Apr '12

27 Apr '12

We were using the libvirt release version (like 0.9.11) and not the configure version (which for stable releases is 0.9.11.X) Most other places got this right so hopefully that's all the fallout from the version format change :) Signed-off-by: Cole Robinson <crobinso(a)redhat.com> --- python/Makefile.am | 2 +- python/tests/Makefile.am | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/python/Makefile.am b/python/Makefile.am index 0305bcc..02b59eb 100644 --- a/python/Makefile.am +++ b/python/Makefile.am @@ -18,7 +18,7 @@ INCLUDES = \ AM_CFLAGS = $(WARN_CFLAGS) -DOCS_DIR = $(datadir)/doc/libvirt-python-$(LIBVIRT_VERSION) +DOCS_DIR = $(datadir)/doc/libvirt-python-$(VERSION) DOCS = ${srcdir}/TODO diff --git a/python/tests/Makefile.am b/python/tests/Makefile.am index 2a5bc62..c387825 100644 --- a/python/tests/Makefile.am +++ b/python/tests/Makefile.am @@ -1,7 +1,7 @@ ## Copyright (C) 2005-2011 Red Hat, Inc. ## See COPYING.LIB for the License of this software -EXAMPLE_DIR = $(datadir)/doc/libvirt-python-$(LIBVIRT_VERSION)/examples +EXAMPLE_DIR = $(datadir)/doc/libvirt-python-$(VERSION)/examples PYTESTS= \ basic.py \ -- 1.7.7.6

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[libvirt] [PATCH] configure: Use ustar format for dist tarball
by Cole Robinson 27 Apr '12

27 Apr '12

Since for stable releases, some test files were over the 99 char limit for traditional tar filenames. Suggested by Osier here: https://www.redhat.com/archives/libvir-list/2012-April/msg01435.html Signed-off-by: Cole Robinson <crobinso(a)redhat.com> --- configure.ac | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/configure.ac b/configure.ac index 89fe818..a819898 100644 --- a/configure.ac +++ b/configure.ac @@ -9,7 +9,7 @@ AC_CONFIG_AUX_DIR([build-aux]) AC_CONFIG_HEADERS([config.h]) AC_CONFIG_MACRO_DIR([m4]) dnl Make automake keep quiet about wildcards & other GNUmake-isms -AM_INIT_AUTOMAKE([-Wno-portability]) +AM_INIT_AUTOMAKE([-Wno-portability tar-ustar]) AM_MAINTAINER_MODE([enable]) # Maintainer note - comment this line out if you plan to rerun -- 1.7.7.6

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[libvirt] [ANNOUNCE] libvirt-glib 0.0.8 release
by Daniel P. Berrange 27 Apr '12

27 Apr '12

am pleased to announce that a new release of the libvirt-glib package, version 0.0.8 is now available from ftp://libvirt.org/libvirt/glib/ The packages are GPG signed with Key fingerprint: DAF3 A6FD B26B 6291 2D0E 8E3F BE86 EBB4 1510 4FDF (4096R) New in this release: - Fix build of test suites with Debian's libtool - Add API for disk source startup policy - Add API for domain controller devices - Add APIs for USB controllers - Add APIs for USB / PCI device addressing schemes - Add APIs for USB redirection devices - Add ASync API for fetching domain info - Add APIs for domain timer configuration libvirt-glib comprises three distinct libraries: - libvirt-glib - Integrate with the GLib event loop and error handling - libvirt-gconfig - Representation of libvirt XML documents as GObjects - libvirt-gobject - Mapping of libvirt APIs into the GObject type system NB: While libvirt aims to be API/ABI stable, for the first few releases, we are *NOT* guaranteeing that libvirt-glib libraries are API/ABI stable. ABI stability will only be guaranteed once the bulk of the APIs have been fleshed out and proved in non-trivial application usage. We anticipate this will be within the next 6 months in order to line up with Fedora 17. Follow up comments about libvirt-glib should be directed to the regular libvir-list redhat com development list. Thanks to all the people involved in contributing to this release. -- |: http://berrange.com -o- http://www.flickr.com/photos/dberrange/ :| |: http://libvirt.org -o- http://virt-manager.org :| |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| |: http://entangle-photo.org -o- http://live.gnome.org/gtk-vnc :|

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[libvirt] [PATCH] lxc: Fix coverity findings
by Stefan Berger 27 Apr '12

27 Apr '12

Fix lxc related coverity findings... Error: UNINIT: /libvirt/src/lxc/lxc_driver.c:1412: var_decl: Declaring variable "fd" without initializer. /libvirt/src/lxc/lxc_driver.c:1460: uninit_use_in_call: Using uninitialized value "fd" when calling "virFileClose". /libvirt/src/util/virfile.c:50: read_parm: Reading a parameter value. Error: DEADCODE: /libvirt/src/lxc/lxc_controller.c:960: dead_error_condition: On this path, the condition "ret == 4" cannot be true. /libvirt/src/lxc/lxc_controller.c:959: at_most: After this line, the value of "ret" is at most -1. /libvirt/src/lxc/lxc_controller.c:959: new_values: Noticing condition "ret < 0". /libvirt/src/lxc/lxc_controller.c:961: dead_error_line: Execution cannot reach this statement "continue;". Error: UNINIT: /libvirt/src/lxc/lxc_controller.c:1104: var_decl: Declaring variable "consoles" without initializer. /libvirt/src/lxc/lxc_controller.c:1237: uninit_use: Using uninitialized value "consoles". --- src/lxc/lxc_controller.c | 4 ++-- src/lxc/lxc_driver.c | 2 +- 2 files changed, 3 insertions(+), 3 deletions(-) Index: libvirt-acl/src/lxc/lxc_driver.c =================================================================== --- libvirt-acl.orig/src/lxc/lxc_driver.c +++ libvirt-acl/src/lxc/lxc_driver.c @@ -1409,7 +1409,7 @@ static int lxcMonitorClient(lxc_driver_t virDomainObjPtr vm) { char *sockpath = NULL; - int fd; + int fd = -1; struct sockaddr_un addr; if (virAsprintf(&sockpath, "%s/%s.sock", Index: libvirt-acl/src/lxc/lxc_controller.c =================================================================== --- libvirt-acl.orig/src/lxc/lxc_controller.c +++ libvirt-acl/src/lxc/lxc_controller.c @@ -957,7 +957,7 @@ static void lxcEpollIO(int watch, int fd int ret; ret = epoll_wait(console->epollFd, &event, 1, 0); if (ret < 0) { - if (ret == EINTR) + if (errno == EINTR) continue; virReportSystemError(errno, "%s", _("Unable to wait on epoll")); @@ -1101,7 +1101,7 @@ static int lxcControllerMain(int serverF size_t nFds, pid_t container) { - struct lxcConsole *consoles; + struct lxcConsole *consoles = NULL; struct lxcMonitor monitor = { .serverFd = serverFd, .clientFd = clientFd,

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[libvirt] Memory leak due to virCopyError()
by Stefan Berger 27 Apr '12

27 Apr '12

If someone has the time ... I am seeing a memory leak in this code path. The leak seems to be triggerable by shutting down a VM: ==4717== 40 bytes in 1 blocks are definitely lost in loss record 547 of 1,014 ==4717== at 0x4A05E46: malloc (vg_replace_malloc.c:195) ==4717== by 0x38EC27FC01: strdup (strdup.c:43) ==4717== by 0x4EA55E0: virCopyError (virterror.c:255) ==4717== by 0x4EA58B1: virCopyLastError (virterror.c:356) ==4717== by 0x4CB4B6: qemuMonitorIO (qemu_monitor.c:646) ==4717== by 0x4E80C7F: virEventPollDispatchHandles (event_poll.c:490) ==4717== by 0x4E8150B: virEventPollRunOnce (event_poll.c:637) ==4717== by 0x4E7F5B7: virEventRunDefaultImpl (event.c:247) ==4717== by 0x4FA4F50: virNetServerRun (virnetserver.c:713) ==4717== by 0x4221AF: main (libvirtd.c:1133) My guess is the leak is related to the initialization of the error structure as for example here: int virConnCopyLastError(virConnectPtr conn, virErrorPtr to) { /* We can't guarantee caller has initialized it to zero */ memset(to, 0, sizeof(*to)); if (conn == NULL) return -1; virMutexLock(&conn->lock); if (conn->err.code == VIR_ERR_OK) virResetError(to); else After memset'ting 'to' to all zeros, the call to virResetError() seems pointless... Such memsets are also in other places potentially overwriting previously allocated pointers... Stefan

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[libvirt] [libvirt-TCK][PATCH] use 'raw' format as the format of backing file of qcow2 image
by Guannan Ren 27 Apr '12

27 Apr '12

If we don't explicitly specify the format of backing file, it should use raw by default, if so, libvirt's security drivers should *not* grant access to the last.img file & the guest should not see the last.img data. That is the purpose of testing. --- scripts/qemu/205-qcow2-double-backing-file.t | 1 - 1 files changed, 0 insertions(+), 1 deletions(-) diff --git a/scripts/qemu/205-qcow2-double-backing-file.t b/scripts/qemu/205-qcow2-double-backing-file.t index d3a5e33..ad54c7c 100644 --- a/scripts/qemu/205-qcow2-double-backing-file.t +++ b/scripts/qemu/205-qcow2-double-backing-file.t @@ -114,7 +114,6 @@ SKIP: { my $volmainxml = $tck->generic_volume("tck-main", "qcow2", 1024*1024*50) ->backing_file($pathback) - ->backing_format("qcow2") ->allocation(0)->as_xml; -- 1.7.7.5

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[libvirt] [PATCH 2/2] [TCK] nwfilter: Add test cases for ipset
by Stefan Berger 27 Apr '12

27 Apr '12

Add test cases for the ipset extension. Since ipset may not be available on all system, the first line of the XML file containing the test filter has been extended with a specially formatted XML comment containing a command line test for whether the test case can be run at all. The format of that line is:  If the tests in this line don't succeed, the test case is skipped. Also add a test case cleaning up the created ipset. Run this test after all other tests using alphabetical ordering. --- scripts/nwfilter/nwfilter2vmtest.sh | 36 +++++++-- scripts/nwfilter/nwfilterxml2fwallout/ipset-test.fwall | 39 ++++++++++ scripts/nwfilter/nwfilterxml2fwallout/zzz-ipset-cleanup.fwall | 1 scripts/nwfilter/nwfilterxml2xmlin/ipset-test.xml | 25 ++++++ scripts/nwfilter/nwfilterxml2xmlin/zzz-ipset-cleanup.xml | 5 + 5 files changed, 99 insertions(+), 7 deletions(-) Index: libvirt-tck/scripts/nwfilter/nwfilterxml2xmlin/ipset-test.xml =================================================================== --- /dev/null +++ libvirt-tck/scripts/nwfilter/nwfilterxml2xmlin/ipset-test.xml @@ -0,0 +1,25 @@ + +<filter name='tck-testcase' chain='root'> + <uuid>5c6d49af-b071-6127-b4ec-6f8ed4b55335</uuid> + <rule action='accept' direction='out'> + <all ipset='tck_test' ipsetflags='src,dst' /> + </rule> + <rule action='accept' direction='in'> + <all state='NONE' ipset='tck_test' ipsetflags='src,dst' comment='in+NONE'/> + </rule> + <rule action='accept' direction='out'> + <all state='NONE' ipset='tck_test' ipsetflags='src,dst' comment='out+NONE'/> + </rule> + <rule action='accept' direction='in'> + <all ipset='tck_test' ipsetflags='SRC,DST,SRC' /> + </rule> + <rule action='accept' direction='in'> + <all ipset='tck_test' ipsetflags='SRC,dSt,SRC' /> + </rule> + <rule action='accept' direction='in'> + <all ipset='$IPSETNAME' ipsetflags='src,dst' /> + </rule> + <rule action='accept' direction='inout'> + <all ipset='$IPSETNAME' ipsetflags='src,dst' comment='inout'/> + </rule> +</filter> Index: libvirt-tck/scripts/nwfilter/nwfilter2vmtest.sh =================================================================== --- libvirt-tck.orig/scripts/nwfilter/nwfilter2vmtest.sh +++ libvirt-tck/scripts/nwfilter/nwfilter2vmtest.sh @@ -107,6 +107,7 @@ checkExpectedOutput() { ifname="$3" flags="$4" skipregex="$5" + skiptest="$6" regex="s/${ORIG_IFNAME}/${ifname}/g" tmpdir=$(mktmpdir) @@ -147,6 +148,18 @@ checkExpectedOutput() { break fi + if [ -n "${skiptest}" ]; then + # treat all skips as passes + passctr=$(($passctr + 1)) + [ $(($flags & $FLAG_VERBOSE)) -ne 0 ] && \ + echo "SKIP ${xmlfile} : ${cmd}" + [ $(($flags & $FLAG_LIBVIRT_TEST)) -ne 0 ] && \ + test_result $(($passctr + $failctr)) "" 0 + [ $(($flags & $FLAG_TAP_TEST)) -ne 0 ] && \ + tap_pass $(($passctr + $failctr)) "SKIP: ${xmlfile} : ${skiptest}" + break + fi + diff -w ${tmpfile} ${tmpfile2} >/dev/null if [ $? -ne 0 ]; then @@ -197,19 +210,27 @@ doTest() { flags="$5" testnum="$6" ctr=0 + skiptest="" if [ ! -r "${xmlfile}" ]; then echo "FAIL : Cannot access filter XML file ${xmlfile}." return 1 fi - ${VIRSH} nwfilter-define "${xmlfile}" > /dev/null + # Check whether we can run this test at all + cmd=`sed -n '1,1 s/^<\!--[ ^I]*#$.*$#[ ^I]*-->/\1/p' ${xmlfile}` + if [ -n "${cmd}" ]; then + eval "${cmd}" 2>&1 1>/dev/null + [ $? -ne 0 ] && skiptest="${cmd}" + fi + + [ -z "${skiptest}" ] && ${VIRSH} nwfilter-define "${xmlfile}" > /dev/null checkExpectedOutput "${xmlfile}" "${fwallfile}" "${vm1name}" "${flags}" \ - "" + "" "${skiptest}" checkExpectedOutput "${TESTFILTERNAME}" "${TESTVM2FWALLDATA}" \ - "${vm2name}" "${flags}" "" + "${vm2name}" "${flags}" "" "${skiptest}" if [ $(($flags & $FLAG_ATTACH)) -ne 0 ]; then @@ -234,9 +255,9 @@ EOF if [ $rc -eq 0 ]; then checkExpectedOutput "${xmlfile}" "${fwallfile}" "${ATTACH_IFNAME}" \ - "${flags}" "(PRE|POST)ROUTING" + "${flags}" "(PRE|POST)ROUTING" "${skiptest}" checkExpectedOutput "${TESTFILTERNAME}" "${TESTVM2FWALLDATA}" \ - "${vm2name}" "${flags}" "(PRE|POST)ROUTING" + "${vm2name}" "${flags}" "(PRE|POST)ROUTING" "${skiptest}" msg=`${VIRSH} detach-device "${vm1name}" "${tmpfile}"` if [ $? -ne 0 ]; then echo "FAIL: Detach of interface failed." @@ -246,9 +267,9 @@ EOF # In case of TAP, run the test anyway so we get to the full number # of tests checkExpectedOutput "${xmlfile}" "${fwallfile}" "${ATTACH_IFNAME}" \ - "${flags}" "" #"(PRE|POST)ROUTING" + "${flags}" "" "${skiptest}" #"(PRE|POST)ROUTING" checkExpectedOutput "${TESTFILTERNAME}" "${TESTVM2FWALLDATA}" \ - "${vm2name}" "${flags}" #"(PRE|POST)ROUTING" + "${vm2name}" "${flags}" "${skiptest}" #"(PRE|POST)ROUTING" fi attachfailctr=$(($attachfailctr + 1)) @@ -357,6 +378,7 @@ createVM() { <parameter name='C' value='1090'/> <parameter name='C' value='1100'/> <parameter name='C' value='1110'/> + <parameter name='IPSETNAME' value='tck_test'/> </filterref> <target dev='${vmname}'/> </interface> Index: libvirt-tck/scripts/nwfilter/nwfilterxml2fwallout/ipset-test.fwall =================================================================== --- /dev/null +++ libvirt-tck/scripts/nwfilter/nwfilterxml2fwallout/ipset-test.fwall @@ -0,0 +1,39 @@ +#iptables -L FI-vnet0 -n +Chain FI-vnet0 (1 references) +target prot opt source destination +RETURN all -- 0.0.0.0/0 0.0.0.0/0 state NEW,ESTABLISHED ctdir REPLY match-set tck_test src,dst +RETURN all -- 0.0.0.0/0 0.0.0.0/0 match-set tck_test src,dst /* out+NONE */ +RETURN all -- 0.0.0.0/0 0.0.0.0/0 state ESTABLISHED ctdir ORIGINAL match-set tck_test dst,src,dst +RETURN all -- 0.0.0.0/0 0.0.0.0/0 state ESTABLISHED ctdir ORIGINAL match-set tck_test dst,src,dst +RETURN all -- 0.0.0.0/0 0.0.0.0/0 state ESTABLISHED ctdir ORIGINAL match-set tck_test dst,src +RETURN all -- 0.0.0.0/0 0.0.0.0/0 match-set tck_test dst,src /* inout */ +#iptables -L FO-vnet0 -n +Chain FO-vnet0 (1 references) +target prot opt source destination +ACCEPT all -- 0.0.0.0/0 0.0.0.0/0 state ESTABLISHED ctdir ORIGINAL match-set tck_test dst,src +ACCEPT all -- 0.0.0.0/0 0.0.0.0/0 match-set tck_test src,dst /* in+NONE */ +ACCEPT all -- 0.0.0.0/0 0.0.0.0/0 state NEW,ESTABLISHED ctdir REPLY match-set tck_test src,dst,src +ACCEPT all -- 0.0.0.0/0 0.0.0.0/0 state NEW,ESTABLISHED ctdir REPLY match-set tck_test src,dst,src +ACCEPT all -- 0.0.0.0/0 0.0.0.0/0 state NEW,ESTABLISHED ctdir REPLY match-set tck_test src,dst +ACCEPT all -- 0.0.0.0/0 0.0.0.0/0 match-set tck_test src,dst /* inout */ +#iptables -L HI-vnet0 -n +Chain HI-vnet0 (1 references) +target prot opt source destination +RETURN all -- 0.0.0.0/0 0.0.0.0/0 state NEW,ESTABLISHED ctdir REPLY match-set tck_test src,dst +RETURN all -- 0.0.0.0/0 0.0.0.0/0 match-set tck_test src,dst /* out+NONE */ +RETURN all -- 0.0.0.0/0 0.0.0.0/0 state ESTABLISHED ctdir ORIGINAL match-set tck_test dst,src,dst +RETURN all -- 0.0.0.0/0 0.0.0.0/0 state ESTABLISHED ctdir ORIGINAL match-set tck_test dst,src,dst +RETURN all -- 0.0.0.0/0 0.0.0.0/0 state ESTABLISHED ctdir ORIGINAL match-set tck_test dst,src +RETURN all -- 0.0.0.0/0 0.0.0.0/0 match-set tck_test dst,src /* inout */ +#iptables -L libvirt-host-in -n | grep vnet0 | tr -s " " +HI-vnet0 all -- 0.0.0.0/0 0.0.0.0/0 [goto] PHYSDEV match --physdev-in vnet0 +#iptables -L libvirt-in -n | grep vnet0 | tr -s " " +FI-vnet0 all -- 0.0.0.0/0 0.0.0.0/0 [goto] PHYSDEV match --physdev-in vnet0 +#iptables -L libvirt-in-post -n | grep vnet0 +ACCEPT all -- 0.0.0.0/0 0.0.0.0/0 PHYSDEV match --physdev-in vnet0 +#iptables -L libvirt-out -n | grep vnet0 | tr -s " " +FO-vnet0 all -- 0.0.0.0/0 0.0.0.0/0 [goto] PHYSDEV match --physdev-out vnet0 +#ebtables -t nat -L libvirt-O-vnet0 2>/dev/null | grep -v "table:" | grep -v "^$" +#ebtables -t nat -L libvirt-I-vnet0 2>/dev/null | grep -v "table:" | grep -v "^$" +#ebtables -t nat -L PREROUTING | grep vnet0 +#ebtables -t nat -L POSTROUTING | grep vnet0 Index: libvirt-tck/scripts/nwfilter/nwfilterxml2fwallout/zzz-ipset-cleanup.fwall =================================================================== --- /dev/null +++ libvirt-tck/scripts/nwfilter/nwfilterxml2fwallout/zzz-ipset-cleanup.fwall @@ -0,0 +1 @@ +#ipset destroy tck_test 2>&1 1>/dev/null Index: libvirt-tck/scripts/nwfilter/nwfilterxml2xmlin/zzz-ipset-cleanup.xml =================================================================== --- /dev/null +++ libvirt-tck/scripts/nwfilter/nwfilterxml2xmlin/zzz-ipset-cleanup.xml @@ -0,0 +1,5 @@ + +<filter name='tck-testcase' chain='root'> + <uuid>5c6d49af-b071-6127-b4ec-6f8ed4b55335</uuid> +  +</filter>

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