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[libvirt] [PATCH]docs: fix typos in libvirt.h.in
by Chen Hanxiao 11 Nov '13

11 Nov '13

From: Chen Hanxiao <chenhanxiao(a)cn.fujitsu.com> s/repersents/represents Signed-off-by: Chen Hanxiao <chenhanxiao(a)cn.fujitsu.com> --- include/libvirt/libvirt.h.in | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/include/libvirt/libvirt.h.in b/include/libvirt/libvirt.h.in index 2802a46..f3751e5 100644 --- a/include/libvirt/libvirt.h.in +++ b/include/libvirt/libvirt.h.in @@ -2503,7 +2503,7 @@ int virDomainBlockCommit(virDomainPtr dom, const char *disk, const char *base, /** * VIR_DOMAIN_BLOCK_IOTUNE_READ_BYTES_SEC: * - * Macro for the BlockIoTune tunable weight: it repersents the read + * Macro for the BlockIoTune tunable weight: it represents the read * bytes per second permitted through a block device, as a ullong. */ #define VIR_DOMAIN_BLOCK_IOTUNE_READ_BYTES_SEC "read_bytes_sec" @@ -2511,7 +2511,7 @@ int virDomainBlockCommit(virDomainPtr dom, const char *disk, const char *base, /** * VIR_DOMAIN_BLOCK_IOTUNE_WRITE_BYTES_SEC: * - * Macro for the BlockIoTune tunable weight: it repersents the write + * Macro for the BlockIoTune tunable weight: it represents the write * bytes per second permitted through a block device, as a ullong. */ #define VIR_DOMAIN_BLOCK_IOTUNE_WRITE_BYTES_SEC "write_bytes_sec" @@ -2519,7 +2519,7 @@ int virDomainBlockCommit(virDomainPtr dom, const char *disk, const char *base, /** * VIR_DOMAIN_BLOCK_IOTUNE_TOTAL_IOPS_SEC: * - * Macro for the BlockIoTune tunable weight: it repersents the total + * Macro for the BlockIoTune tunable weight: it represents the total * I/O operations per second permitted through a block device, as a ullong. */ #define VIR_DOMAIN_BLOCK_IOTUNE_TOTAL_IOPS_SEC "total_iops_sec" @@ -2527,14 +2527,14 @@ int virDomainBlockCommit(virDomainPtr dom, const char *disk, const char *base, /** * VIR_DOMAIN_BLOCK_IOTUNE_READ_IOPS_SEC: * - * Macro for the BlockIoTune tunable weight: it repersents the read + * Macro for the BlockIoTune tunable weight: it represents the read * I/O operations per second permitted through a block device, as a ullong. */ #define VIR_DOMAIN_BLOCK_IOTUNE_READ_IOPS_SEC "read_iops_sec" /** * VIR_DOMAIN_BLOCK_IOTUNE_WRITE_IOPS_SEC: - * Macro for the BlockIoTune tunable weight: it repersents the write + * Macro for the BlockIoTune tunable weight: it represents the write * I/O operations per second permitted through a block device, as a ullong. */ #define VIR_DOMAIN_BLOCK_IOTUNE_WRITE_IOPS_SEC "write_iops_sec" -- 1.8.2.1

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[libvirt] [PATCH] Don't expose 'none' machine type to capabilities
by Daniel P. Berrange 11 Nov '13

11 Nov '13

From: "Daniel P. Berrange" <berrange(a)redhat.com> The 'none' machine type is something only intended for use by libvirt probing capabilities. It isn't something that is useful for running real VM instances. As such it should not be exposed to users in the capabilities. Signed-off-by: Daniel P. Berrange <berrange(a)redhat.com> --- src/qemu/qemu_capabilities.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c index 2712a4d..548b988 100644 --- a/src/qemu/qemu_capabilities.c +++ b/src/qemu/qemu_capabilities.c @@ -2137,6 +2137,8 @@ virQEMUCapsProbeQMPMachineTypes(virQEMUCapsPtr qemuCaps, goto cleanup; for (i = 0; i < nmachines; i++) { + if (STREQ(machines[i]->name, "none")) + continue; qemuCaps->nmachineTypes++; if (VIR_STRDUP(qemuCaps->machineAliases[qemuCaps->nmachineTypes -1], machines[i]->alias) < 0 || -- 1.8.3.1

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[libvirt] [PATCH] Fix busy wait loop in LXC container I/O handling
by Daniel P. Berrange 11 Nov '13

11 Nov '13

From: "Daniel P. Berrange" <berrange(a)redhat.com> If the host side of an LXC container console disconnected and the guest side continued to write data, until the PTY buffer filled up, the LXC controller would busy wait. It would repeatedly see POLLHUP from poll() and not disable the watch. This was due to some bogus logic detecting blocking conditions. Upon seeing a POLLHUP we must disable all reading & writing from the PTY, and setup the epoll to wake us up again when the connection comes back. Signed-off-by: Daniel P. Berrange <berrange(a)redhat.com> --- src/lxc/lxc_controller.c | 32 +++++++++++++++++--------------- 1 file changed, 17 insertions(+), 15 deletions(-) diff --git a/src/lxc/lxc_controller.c b/src/lxc/lxc_controller.c index c8f68c0..c76e8d4 100644 --- a/src/lxc/lxc_controller.c +++ b/src/lxc/lxc_controller.c @@ -77,13 +77,11 @@ struct _virLXCControllerConsole { int hostFd; /* PTY FD in the host OS */ bool hostClosed; int hostEpoll; - bool hostBlocking; int contWatch; int contFd; /* PTY FD in the container */ bool contClosed; int contEpoll; - bool contBlocking; int epollWatch; int epollFd; /* epoll FD for dealing with EOF */ @@ -814,12 +812,15 @@ static void virLXCControllerSignalChildIO(virNetServerPtr server, int status; ret = waitpid(-1, &status, WNOHANG); + VIR_DEBUG("Got sig child %d vs %lld", ret, (unsigned long long)ctrl->initpid); if (ret == ctrl->initpid) { virNetServerQuit(server); virMutexLock(&lock); if (WIFSIGNALED(status) && - WTERMSIG(status) == SIGHUP) + WTERMSIG(status) == SIGHUP) { + VIR_DEBUG("Status indicates reboot"); wantReboot = true; + } virMutexUnlock(&lock); } } @@ -830,28 +831,32 @@ static void virLXCControllerConsoleUpdateWatch(virLXCControllerConsolePtr consol int hostEvents = 0; int contEvents = 0; - if (!console->hostClosed || (!console->hostBlocking && console->fromContLen)) { + /* If host console is open, then we can look to read/write */ + if (!console->hostClosed) { if (console->fromHostLen < sizeof(console->fromHostBuf)) hostEvents |= VIR_EVENT_HANDLE_READABLE; if (console->fromContLen) hostEvents |= VIR_EVENT_HANDLE_WRITABLE; } - if (!console->contClosed || (!console->contBlocking && console->fromHostLen)) { + + /* If cont console is open, then we can look to read/write */ + if (!console->contClosed) { if (console->fromContLen < sizeof(console->fromContBuf)) contEvents |= VIR_EVENT_HANDLE_READABLE; if (console->fromHostLen) contEvents |= VIR_EVENT_HANDLE_WRITABLE; } - VIR_DEBUG("Container watch %d=%d host watch %d=%d", - console->contWatch, contEvents, - console->hostWatch, hostEvents); + VIR_DEBUG("Container watch=%d, events=%d closed=%d; host watch=%d events=%d closed=%d", + console->contWatch, contEvents, console->contClosed, + console->hostWatch, hostEvents, console->hostClosed); virEventUpdateHandle(console->contWatch, contEvents); virEventUpdateHandle(console->hostWatch, hostEvents); if (console->hostClosed) { + /* Must setup an epoll to detect when host becomes accessible again */ int events = EPOLLIN | EPOLLET; - if (console->hostBlocking) + if (console->fromContLen) events |= EPOLLOUT; if (events != console->hostEpoll) { @@ -887,8 +892,9 @@ static void virLXCControllerConsoleUpdateWatch(virLXCControllerConsolePtr consol } if (console->contClosed) { + /* Must setup an epoll to detect when guest becomes accessible again */ int events = EPOLLIN | EPOLLET; - if (console->contBlocking) + if (console->fromHostLen) events |= EPOLLOUT; if (events != console->contEpoll) { @@ -959,7 +965,7 @@ static void virLXCControllerConsoleEPoll(int watch, int fd, int events, void *op /* If we get HUP+dead PID, we just re-enable the main loop * which will see the PID has died and exit */ - if ((event.events & EPOLLIN)) { + if ((event.events & (EPOLLIN|EPOLLOUT))) { if (event.data.fd == console->hostFd) { console->hostClosed = false; } else { @@ -1039,10 +1045,6 @@ static void virLXCControllerConsoleIO(int watch, int fd, int events, void *opaqu *len -= done; } else { VIR_DEBUG("Write fd %d done %d errno %d", fd, (int)done, errno); - if (watch == console->hostWatch) - console->hostBlocking = true; - else - console->contBlocking = true; } } -- 1.8.3.1

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[libvirt] [PATCH] Fix mem leak in virQEMUCapsProbeQMPMachineTypes on OOM
by Daniel P. Berrange 11 Nov '13

11 Nov '13

From: "Daniel P. Berrange" <berrange(a)redhat.com> The virQEMUCapsProbeQMPMachineTypes method iterates over machine types copying them into the qemuCapsPtr object. It only updates the qemuCaps->nmachinetypes value at the end though. So if OOM occurs in the middle, the destructor of qemuCapsPtr will not free the partially initialized machine types. Signed-off-by: Daniel P. Berrange <berrange(a)redhat.com> --- src/qemu/qemu_capabilities.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c index 71a913b..2712a4d 100644 --- a/src/qemu/qemu_capabilities.c +++ b/src/qemu/qemu_capabilities.c @@ -2137,14 +2137,17 @@ virQEMUCapsProbeQMPMachineTypes(virQEMUCapsPtr qemuCaps, goto cleanup; for (i = 0; i < nmachines; i++) { - if (VIR_STRDUP(qemuCaps->machineAliases[i], machines[i]->alias) < 0 || - VIR_STRDUP(qemuCaps->machineTypes[i], machines[i]->name) < 0) + qemuCaps->nmachineTypes++; + if (VIR_STRDUP(qemuCaps->machineAliases[qemuCaps->nmachineTypes -1], + machines[i]->alias) < 0 || + VIR_STRDUP(qemuCaps->machineTypes[qemuCaps->nmachineTypes - 1], + machines[i]->name) < 0) goto cleanup; if (machines[i]->isDefault) defIdx = i; - qemuCaps->machineMaxCpus[i] = machines[i]->maxCpus; + qemuCaps->machineMaxCpus[qemuCaps->nmachineTypes - 1] = + machines[i]->maxCpus; } - qemuCaps->nmachineTypes = nmachines; if (defIdx) virQEMUCapsSetDefaultMachine(qemuCaps, defIdx); -- 1.8.3.1

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[libvirt] [PATCH 0/2] Make vir*Free to set ptr to NULL
by Michal Privoznik 11 Nov '13

11 Nov '13

This is just a start to see if upstream likes it or not. If it turns out we want this I can supply more patches - there are plenty of vir.*Free() functions which doesn't set ptr to NULL. My aim is to make it more visible where are we using stale pointer. Because if the pointer is not set to NULL it may happen that the page isn't unmapped, so on write access we are overwriting something else (perhaps glibc internal structs). We may get SIGSEGV later on, but it will not show the root cause but some random location instead. So you often have to run it under valgrind to get to the real root cause. And I don't need to say how tricky is that, do I? Of course, it won't catch every stale pointer bug we have, but my aim is to catch a few at least. Michal Privoznik (2): virObjectUnref: Set pointer to NULL on dispose virCommandFree: Set pointer to NULL src/fdstream.c | 1 - src/libvirt_private.syms | 4 ++-- src/qemu/qemu_driver.c | 1 - src/storage/storage_backend_logical.c | 3 --- src/util/vircommand.c | 11 ++++++++--- src/util/vircommand.h | 4 +++- src/util/viridentity.c | 2 +- src/util/virnetdevveth.c | 1 - src/util/virobject.c | 13 ++++++++----- src/util/virobject.h | 5 ++++- 10 files changed, 26 insertions(+), 19 deletions(-) -- 1.8.1.5

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[libvirt] [PATCH] virsh-domain: Mark --live and --config mutually exclusive in vcpucount
by Peter Krempa 11 Nov '13

11 Nov '13

The 'vcpucount' command is a getter command for the vCPUu count. When one or more of the filtering flags are specified the command returns the value only for the selected combination. In this case the --live and --config combination isn't valid. This however didn't cause errors as the combination of flags was rejected by the libvirt API but then the fallback code kicked in and requested the count in a way where the clash of the flags didn't matter. Mark the flag combination mutually exclusive so that user's aren't confused. Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1024245 --- tools/virsh-domain.c | 1 + 1 file changed, 1 insertion(+) diff --git a/tools/virsh-domain.c b/tools/virsh-domain.c index 59e3d8d..60abd3d 100644 --- a/tools/virsh-domain.c +++ b/tools/virsh-domain.c @@ -5331,6 +5331,7 @@ cmdVcpucount(vshControl *ctl, const vshCmd *cmd) if (!maximum && !active && current) current = false; + VSH_EXCLUSIVE_OPTIONS_VAR(live, config) VSH_EXCLUSIVE_OPTIONS_VAR(current, live); VSH_EXCLUSIVE_OPTIONS_VAR(current, config); VSH_EXCLUSIVE_OPTIONS_VAR(active, maximum); -- 1.8.4.2

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[libvirt] [PATCH] Only determine GuestCPU features if required
by Guido Günther 11 Nov '13

11 Nov '13

There's no need to probe CPU features if we don't need them later. Debian Wheezy's QEMU 1.1.2 lacks the feature-word option so this unbreaks starting domains that got broken by d94b7817719b064849818b9ba6c37e403b7c003c like error: internal error: unable to execute QEMU command 'qom-get': Property '.feature-words' not found --- This might not be ideal since we might to want to use qemuMonitorGetGuestCPU somewhere else later so I'm happy to improve on this. Cheers, -- Guido src/qemu/qemu_process.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/src/qemu/qemu_process.c b/src/qemu/qemu_process.c index fcceedd..be09ea0 100644 --- a/src/qemu/qemu_process.c +++ b/src/qemu/qemu_process.c @@ -3477,14 +3477,14 @@ qemuProcessVerifyGuestCPU(virQEMUDriverPtr driver, virDomainObjPtr vm) switch (arch) { case VIR_ARCH_I686: case VIR_ARCH_X86_64: - qemuDomainObjEnterMonitor(driver, vm); - guestcpu = qemuMonitorGetGuestCPU(priv->mon, arch); - qemuDomainObjExitMonitor(driver, vm); + if (def->features[VIR_DOMAIN_FEATURE_PVSPINLOCK] == VIR_DOMAIN_FEATURE_STATE_ON) { + qemuDomainObjEnterMonitor(driver, vm); + guestcpu = qemuMonitorGetGuestCPU(priv->mon, arch); + qemuDomainObjExitMonitor(driver, vm); - if (!(guestcpu)) - goto cleanup; + if (!(guestcpu)) + goto cleanup; - if (def->features[VIR_DOMAIN_FEATURE_PVSPINLOCK] == VIR_DOMAIN_FEATURE_STATE_ON) { if (!cpuHasFeature(guestcpu, VIR_CPU_x86_KVM_PV_UNHALT)) { virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", _("host doesn't support paravirtual spinlocks")); -- 1.8.4.2

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[libvirt] [PATCH] docs: fix virDomainRestoreFlags description bug
by Wangyufei (A) 08 Nov '13

08 Nov '13

>From 605afa95417a4ad086570f0fb6df4a5fe68ffc7f Mon Sep 17 00:00:00 2001 From: Wang Yufei <james.wangyufei(a)huawei.com> Date: Thu, 7 Nov 2013 16:44:04 +0800 Subject: [PATCH] docs: fix virDomainRestoreFlags description bug In virDomainRestoreFlags with VIR_DOMAIN_SAVE_BYPASS_CACHE, it risks slowing restores from NFS, but not saves to NFS. Signed-off-by: Wang Yufei <james.wangyufei(a)huawei.com> --- src/libvirt.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/src/libvirt.c b/src/libvirt.c index 7d94cd7..90608ab 100644 --- a/src/libvirt.c +++ b/src/libvirt.c @@ -2925,7 +2925,7 @@ error: * If @flags includes VIR_DOMAIN_SAVE_BYPASS_CACHE, then libvirt will * attempt to bypass the file system cache while restoring the file, or * fail if it cannot do so for the given system; this can allow less - * pressure on file system cache, but also risks slowing saves to NFS. + * pressure on file system cache, but also risks slowing restores from NFS. * * Normally, the saved state file will remember whether the domain was * running or paused, and restore defaults to the same state. -- 1.7.3.1.msysgit.0 Best Regards, -WangYufei

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[libvirt] [PATCHv3 0/6] Introduce paravirtual spinlock support
by Peter Krempa 08 Nov '13

08 Nov '13

Version 3 is fixed according to the review feedback. Please see individual patches for changelog. Jiri Denemark (1): qemu: Add monitor APIs to fetch CPUID data from QEMU Peter Krempa (5): cpu_x86: Refactor storage of CPUID data to add support for KVM features cpu: x86: Add internal CPUID features support and KVM feature bits conf: Refactor storing and usage of feature flags qemu: Add support for paravirtual spinlocks in the guest qemu: process: Validate specific CPUID flags of a guest docs/formatdomain.html.in | 8 + docs/schemas/domaincommon.rng | 10 +- src/conf/domain_conf.c | 195 +++++++++++---- src/conf/domain_conf.h | 3 +- src/cpu/cpu_x86.c | 277 +++++++++++---------- src/cpu/cpu_x86_data.h | 20 +- src/libxl/libxl_conf.c | 9 +- src/lxc/lxc_container.c | 6 +- src/qemu/qemu_command.c | 28 ++- src/qemu/qemu_monitor.c | 31 +++ src/qemu/qemu_monitor.h | 4 + src/qemu/qemu_monitor_json.c | 133 ++++++++++ src/qemu/qemu_monitor_json.h | 2 + src/qemu/qemu_process.c | 46 ++++ src/vbox/vbox_tmpl.c | 45 ++-- src/xenapi/xenapi_driver.c | 10 +- src/xenapi/xenapi_utils.c | 22 +- src/xenxs/xen_sxpr.c | 20 +- src/xenxs/xen_xm.c | 30 +-- tests/Makefile.am | 1 + .../qemumonitorjson-getcpu-full.data | 5 + .../qemumonitorjson-getcpu-full.json | 46 ++++ .../qemumonitorjson-getcpu-host.data | 6 + .../qemumonitorjson-getcpu-host.json | 45 ++++ tests/qemumonitorjsontest.c | 75 ++++++ .../qemuxml2argv-pv-spinlock-disabled.args | 5 + .../qemuxml2argv-pv-spinlock-disabled.xml | 26 ++ .../qemuxml2argv-pv-spinlock-enabled.args | 5 + .../qemuxml2argv-pv-spinlock-enabled.xml | 26 ++ tests/qemuxml2argvtest.c | 2 + tests/qemuxml2xmltest.c | 2 + 31 files changed, 869 insertions(+), 274 deletions(-) create mode 100644 tests/qemumonitorjsondata/qemumonitorjson-getcpu-full.data create mode 100644 tests/qemumonitorjsondata/qemumonitorjson-getcpu-full.json create mode 100644 tests/qemumonitorjsondata/qemumonitorjson-getcpu-host.data create mode 100644 tests/qemumonitorjsondata/qemumonitorjson-getcpu-host.json create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-pv-spinlock-disabled.args create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-pv-spinlock-disabled.xml create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-pv-spinlock-enabled.args create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-pv-spinlock-enabled.xml -- 1.8.4.2

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[libvirt] [PATCH] docs: grammar fixes
by Eric Blake 08 Nov '13

08 Nov '13

Fix some user-visible wording from commits 72aafe9 and 1606d89. * src/qemu/qemu.conf (migration_address): Better wording. * include/libvirt/libvirt.h.in (VIR_MIGRATE_PARAM_LISTEN_ADDRESS): Likewise. Signed-off-by: Eric Blake <eblake(a)redhat.com> --- Pushing under the trivial rule. include/libvirt/libvirt.h.in | 6 +++--- src/qemu/qemu.conf | 2 +- 2 files changed, 4 insertions(+), 4 deletions(-) diff --git a/include/libvirt/libvirt.h.in b/include/libvirt/libvirt.h.in index 2802a46..d7a5e90 100644 --- a/include/libvirt/libvirt.h.in +++ b/include/libvirt/libvirt.h.in @@ -1274,10 +1274,10 @@ typedef enum { * VIR_MIGRATE_PARAM_LISTEN_ADDRESS: * * virDomainMigrate* params field: The listen address that hypervisor on the - * destination side should bind to for incoming migration. Both, IPv4 and IPv6 + * destination side should bind to for incoming migration. Both IPv4 and IPv6 * addresses are accepted as well as hostnames (the resolving is done on - * destination). Some hypervisors do not support this feature an will return an - * error if this field is used. + * destination). Some hypervisors do not support this feature and will return + * an error if this field is used. */ #define VIR_MIGRATE_PARAM_LISTEN_ADDRESS "listen_address" diff --git a/src/qemu/qemu.conf b/src/qemu/qemu.conf index 6cfb9ea..17f1b10 100644 --- a/src/qemu/qemu.conf +++ b/src/qemu/qemu.conf @@ -450,7 +450,7 @@ # Override the listen address for all incoming migrations. Defaults to -# 0.0.0.0 or :: in case if both host and qemu are capable of IPv6. +# 0.0.0.0, or :: if both host and qemu are capable of IPv6. #migration_address = "127.0.0.1" -- 1.8.3.1

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