February 2013 - Devel - libvirt List Archives

[libvirt] [PATCH] Fix PKI directory used for QEMU test suite
by Daniel P. Berrange 07 Feb '13

07 Feb '13

From: "Daniel P. Berrange" <berrange(a)redhat.com> The data files for testing QEMU command line generation are hardcoded to use /etc/pki, so we should explicitly set that in the test case, avoiding the dynamic SYSCONFDIR value. Signed-off-by: Daniel P. Berrange <berrange(a)redhat.com> --- tests/qemuxml2argvtest.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/tests/qemuxml2argvtest.c b/tests/qemuxml2argvtest.c index c0c720e..c2a379d 100644 --- a/tests/qemuxml2argvtest.c +++ b/tests/qemuxml2argvtest.c @@ -282,6 +282,13 @@ mymain(void) VIR_FREE(driver.config->spiceListen); VIR_FREE(driver.config->vncListen); + VIR_FREE(driver.config->vncTLSx509certdir); + if ((driver.config->vncTLSx509certdir = strdup("/etc/pki/libvirt-vnc")) == NULL) + return EXIT_FAILURE; + VIR_FREE(driver.config->spiceTLSx509certdir); + if ((driver.config->spiceTLSx509certdir = strdup("/etc/pki/libvirt-spice")) == NULL) + return EXIT_FAILURE; + if ((driver.caps = testQemuCapsInit()) == NULL) return EXIT_FAILURE; VIR_FREE(driver.config->stateDir); -- 1.8.1

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[libvirt] [PATCH 1/2] virCommandDoAsyncIO: Resolve race
by Michal Privoznik 07 Feb '13

07 Feb '13

With current implementation, virCommandWait unregister the stdio callback and finish reading itself. However, the eventloop may already have been in process of executing the callback in which case one obtain these obscure error messages, like: 2013-02-06 11:41:43.766+0000: 19078: warning : virEventPollRemoveHandle:183 : Ignoring invalid remove watch -1 2013-02-06 11:41:43.766+0000: 19078: warning : virFileClose:65 : Tried to close invalid fd 25 The solution is to introduce a mutex and condition to virCommand, and wait in virCommandWait for the eventloop to process all IOs. This, however, requires all callees to unlock all mutexes held, otherwise the eventloop may try to lock one of them and experience deadlock. If that's the case, we will never be woken up to unlock the problematic mutex. --- src/qemu/qemu_driver.c | 58 +++++++++++++++++++++++++--- src/qemu/qemu_migration.c | 15 +++++++- src/util/vircommand.c | 98 ++++++++++++++++++++++++++++++++++++----------- src/util/virfile.c | 4 ++ 4 files changed, 146 insertions(+), 29 deletions(-) diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c index 979a027..e10fc89 100644 --- a/src/qemu/qemu_driver.c +++ b/src/qemu/qemu_driver.c @@ -2757,6 +2757,7 @@ qemuDomainSaveMemory(virQEMUDriverPtr driver, int fd = -1; int directFlag = 0; virFileWrapperFdPtr wrapperFd = NULL; + int wrapperFd_ret; unsigned int wrapperFlags = VIR_FILE_WRAPPER_NON_BLOCKING; unsigned long long pad; unsigned long long offset; @@ -2833,7 +2834,15 @@ qemuDomainSaveMemory(virQEMUDriverPtr driver, goto cleanup; } - if (virFileWrapperFdClose(wrapperFd) < 0) + /* virCommandDoAsyncIO requires us to release all locks held */ + virObjectRef(vm); + virObjectUnlock(vm); + qemuDriverUnlock(driver); + wrapperFd_ret = virFileWrapperFdClose(wrapperFd); + qemuDriverLock(driver); + virObjectLock(vm); + virObjectUnref(vm); + if (wrapperFd_ret < 0) goto cleanup; if ((fd = qemuOpenFile(driver, path, O_WRONLY, NULL, NULL)) < 0) @@ -3240,6 +3249,7 @@ doCoreDump(virQEMUDriverPtr driver, int fd = -1; int ret = -1; virFileWrapperFdPtr wrapperFd = NULL; + int wrapperFd_ret; int directFlag = 0; unsigned int flags = VIR_FILE_WRAPPER_NON_BLOCKING; @@ -3281,7 +3291,16 @@ doCoreDump(virQEMUDriverPtr driver, path); goto cleanup; } - if (virFileWrapperFdClose(wrapperFd) < 0) + + /* virCommandDoAsyncIO requires us to release all locks held */ + virObjectRef(vm); + virObjectUnlock(vm); + qemuDriverUnlock(driver); + wrapperFd_ret = virFileWrapperFdClose(wrapperFd); + qemuDriverLock(driver); + virObjectLock(vm); + virObjectUnref(vm); + if (wrapperFd_ret < 0) goto cleanup; ret = 0; @@ -4854,6 +4873,7 @@ qemuDomainSaveImageStartVM(virConnectPtr conn, virDomainEventPtr event; int intermediatefd = -1; virCommandPtr cmd = NULL; + int cmd_ret; char *errbuf = NULL; virQEMUDriverConfigPtr cfg = virQEMUDriverGetConfig(driver); @@ -4901,7 +4921,15 @@ qemuDomainSaveImageStartVM(virConnectPtr conn, VIR_FORCE_CLOSE(*fd); } - if (virCommandWait(cmd, NULL) < 0) { + /* virCommandDoAsyncIO requires us to release all locks held */ + virObjectRef(vm); + virObjectUnlock(vm); + qemuDriverUnlock(driver); + cmd_ret = virCommandWait(cmd, NULL); + qemuDriverLock(driver); + virObjectLock(vm); + virObjectUnref(vm); + if (cmd_ret < 0) { qemuProcessStop(driver, vm, VIR_DOMAIN_SHUTOFF_FAILED, 0); ret = -1; } @@ -4976,6 +5004,7 @@ qemuDomainRestoreFlags(virConnectPtr conn, int ret = -1; virQEMUSaveHeader header; virFileWrapperFdPtr wrapperFd = NULL; + int wrapperFd_ret; int state = -1; virCheckFlags(VIR_DOMAIN_SAVE_BYPASS_CACHE | @@ -5009,7 +5038,16 @@ qemuDomainRestoreFlags(virConnectPtr conn, ret = qemuDomainSaveImageStartVM(conn, driver, vm, &fd, &header, path, false); - if (virFileWrapperFdClose(wrapperFd) < 0) + + /* virCommandDoAsyncIO requires us to release all locks held */ + virObjectRef(vm); + virObjectUnlock(vm); + qemuDriverUnlock(driver); + wrapperFd_ret = virFileWrapperFdClose(wrapperFd); + qemuDriverLock(driver); + virObjectLock(vm); + virObjectUnref(vm); + if (wrapperFd_ret < 0) VIR_WARN("Failed to close %s", path); if (qemuDomainObjEndJob(driver, vm) == 0) @@ -5153,6 +5191,7 @@ qemuDomainObjRestore(virConnectPtr conn, int ret = -1; virQEMUSaveHeader header; virFileWrapperFdPtr wrapperFd = NULL; + int wrapperFd_ret; fd = qemuDomainSaveImageOpen(driver, path, &def, &header, bypass_cache, &wrapperFd, NULL, -1, false, @@ -5182,7 +5221,16 @@ qemuDomainObjRestore(virConnectPtr conn, ret = qemuDomainSaveImageStartVM(conn, driver, vm, &fd, &header, path, start_paused); - if (virFileWrapperFdClose(wrapperFd) < 0) + + /* virCommandDoAsyncIO requires us to release all locks held */ + virObjectRef(vm); + virObjectUnlock(vm); + qemuDriverUnlock(driver); + wrapperFd_ret = virFileWrapperFdClose(wrapperFd); + qemuDriverLock(driver); + virObjectLock(vm); + virObjectUnref(vm); + if (wrapperFd_ret < 0) VIR_WARN("Failed to close %s", path); cleanup: diff --git a/src/qemu/qemu_migration.c b/src/qemu/qemu_migration.c index a75fb4e..ddbfd18 100644 --- a/src/qemu/qemu_migration.c +++ b/src/qemu/qemu_migration.c @@ -3610,6 +3610,7 @@ qemuMigrationToFile(virQEMUDriverPtr driver, virDomainObjPtr vm, int rc; bool restoreLabel = false; virCommandPtr cmd = NULL; + int cmd_ret; int pipeFD[2] = { -1, -1 }; unsigned long saveMigBandwidth = priv->migMaxBandwidth; char *errbuf = NULL; @@ -3729,8 +3730,18 @@ qemuMigrationToFile(virQEMUDriverPtr driver, virDomainObjPtr vm, if (rc < 0) goto cleanup; - if (cmd && virCommandWait(cmd, NULL) < 0) - goto cleanup; + if (cmd) { + /* virCommandDoAsyncIO requires us to release all locks held */ + virObjectRef(vm); + virObjectUnlock(vm); + qemuDriverUnlock(driver); + cmd_ret = virCommandWait(cmd, NULL); + qemuDriverLock(driver); + virObjectLock(vm); + virObjectUnref(vm); + if (cmd_ret < 0) + goto cleanup; + } ret = 0; diff --git a/src/util/vircommand.c b/src/util/vircommand.c index db7dbca..97ff135 100644 --- a/src/util/vircommand.c +++ b/src/util/vircommand.c @@ -42,6 +42,7 @@ #include "virpidfile.h" #include "virprocess.h" #include "virbuffer.h" +#include "virthread.h" #define VIR_FROM_THIS VIR_FROM_NONE @@ -90,6 +91,9 @@ struct _virCommand { int outWatch; int errWatch; + virMutex lock; + virCond cond; + bool handshake; int handshakeWait[2]; int handshakeNotify[2]; @@ -788,9 +792,24 @@ virCommandNewArgs(const char *const*args) cmd->inWatch = cmd->outWatch = cmd->errWatch = -1; cmd->pid = -1; + if (virMutexInit(&cmd->lock) < 0) { + virReportSystemError(errno, "%s", _("Unable to init mutex")); + goto error; + } + + if (virCondInit(&cmd->cond) < 0) { + virReportSystemError(errno, "%s", _("Unable to init cond")); + virMutexDestroy(&cmd->lock); + goto error; + } + virCommandAddArgSet(cmd, args); return cmd; + +error: + VIR_FREE(cmd); + return NULL; } /** @@ -2146,6 +2165,8 @@ virCommandHandleReadWrite(int watch, int fd, int events, void *opaque) bool eof = false; int *fdptr = NULL, **fdptrptr = NULL; + virMutexLock(&cmd->lock); + VIR_DEBUG("watch=%d fd=%d events=%d", watch, fd, events); errno = 0; @@ -2190,14 +2211,21 @@ virCommandHandleReadWrite(int watch, int fd, int events, void *opaque) bufptr = &cmd->outbuf; fdptr = &cmd->outfd; fdptrptr = &cmd->outfdptr; - } else { + } else if (watch == cmd->errWatch) { watchPtr = &cmd->errWatch; bufptr = &cmd->errbuf; fdptr = &cmd->errfd; fdptrptr = &cmd->errfdptr; + } else { + /* Suspicious wakeup ... */ + virCondBroadcast(&cmd->cond); + virMutexUnlock(&cmd->lock); + return; } - if (events & VIR_EVENT_HANDLE_READABLE) { + if (events & (VIR_EVENT_HANDLE_READABLE | + VIR_EVENT_HANDLE_HANGUP | + VIR_EVENT_HANDLE_ERROR)) { if (**bufptr) len = strlen(**bufptr); @@ -2241,7 +2269,9 @@ virCommandHandleReadWrite(int watch, int fd, int events, void *opaque) *bufptr = NULL; if (fdptrptr) *fdptrptr = NULL; + virCondBroadcast(&cmd->cond); } + virMutexUnlock(&cmd->lock); } @@ -2377,24 +2407,24 @@ virCommandRunAsync(virCommandPtr cmd, pid_t *pid) virReportError(VIR_ERR_INTERNAL_ERROR, _("command is already running as pid %lld"), (long long) cmd->pid); - return -1; + goto cleanup; } if (!synchronous && (cmd->flags & VIR_EXEC_DAEMON)) { virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("daemonized command cannot use virCommandRunAsync")); - return -1; + goto cleanup; } if (cmd->pwd && (cmd->flags & VIR_EXEC_DAEMON)) { virReportError(VIR_ERR_INTERNAL_ERROR, _("daemonized command cannot set working directory %s"), cmd->pwd); - return -1; + goto cleanup; } if (cmd->pidfile && !(cmd->flags & VIR_EXEC_DAEMON)) { virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("creation of pid file requires daemonized command")); - return -1; + goto cleanup; } str = virCommandToString(cmd); @@ -2439,6 +2469,12 @@ virCommandRunAsync(virCommandPtr cmd, pid_t *pid) ret = virCommandRegisterEventLoop(cmd); } +cleanup: + if (ret < 0) { + VIR_FORCE_CLOSE(infd[0]); + VIR_FORCE_CLOSE(infd[1]); + cmd->infd = -1; + } return ret; } @@ -2453,13 +2489,16 @@ virCommandRunAsync(virCommandPtr cmd, pid_t *pid) * completion. Returns 0 if the command * finished with the exit status set. If @exitstatus is NULL, then the * child must exit with status 0 for this to succeed. + * + * In case virCommandDoAsyncIO() has been requested previously on + * @cmd, this command may block. So you are required to unlock all + * locks held prior calling this function. */ int virCommandWait(virCommandPtr cmd, int *exitstatus) { int ret; int status = 0; - const int events = VIR_EVENT_HANDLE_READABLE | VIR_EVENT_HANDLE_HANGUP; if (!cmd ||cmd->has_error == ENOMEM) { virReportOOMError(); @@ -2485,22 +2524,25 @@ virCommandWait(virCommandPtr cmd, int *exitstatus) * and repeat the exitstatus check code ourselves. */ ret = virProcessWait(cmd->pid, exitstatus ? exitstatus : &status); - if (cmd->inWatch != -1) { - virEventRemoveHandle(cmd->inWatch); - cmd->inWatch = -1; - } - - if (cmd->outWatch != -1) { - virEventRemoveHandle(cmd->outWatch); - virCommandHandleReadWrite(cmd->outWatch, cmd->outfd, events, cmd); - cmd->outWatch = -1; - } - - if (cmd->errWatch != -1) { - virEventRemoveHandle(cmd->errWatch); - virCommandHandleReadWrite(cmd->errWatch, cmd->errfd, events, cmd); - cmd->errWatch = -1; + /* Hopefully, all locks has been unlocked. Otherwise, the + * eventloop might be trying to lock one of them again, which + * will deadlock (obviously), and we will never be woken up here */ + virMutexLock(&cmd->lock); + while (!(cmd->inWatch == -1 && + cmd->outWatch == -1 && + cmd->errWatch == -1)) { + VIR_DEBUG("Waiting on in=%d out=%d err=%d", + cmd->inWatch, cmd->outWatch, cmd->errWatch); + + if (virCondWait(&cmd->cond, &cmd->lock) < 0) { + virReportSystemError(errno, "%s", + _("Unable to wait on condition")); + break; + } + VIR_DEBUG("Done waiting on in=%d out=%d err=%d", + cmd->inWatch, cmd->outWatch, cmd->errWatch); } + virMutexUnlock(&cmd->lock); if (ret == 0) { cmd->pid = -1; @@ -2719,6 +2761,9 @@ virCommandFree(virCommandPtr cmd) VIR_FORCE_CLOSE(cmd->transfer[i]); } + virMutexDestroy(&cmd->lock); + ignore_value(virCondDestroy(&cmd->cond)); + VIR_FREE(cmd->inbuf); VIR_FORCE_CLOSE(cmd->outfd); VIR_FORCE_CLOSE(cmd->errfd); @@ -2772,6 +2817,7 @@ virCommandFree(virCommandPtr cmd) * * ... * + * // release all locks held (qemu, virDomainObj, ... ) * if (virCommandWait(cmd, NULL) < 0) * goto cleanup; * @@ -2789,6 +2835,14 @@ virCommandFree(virCommandPtr cmd) * of data to be written to @cmd's stdin, don't pass any binary * data. If you want to re-run command, you need to call this and * buffer setting functions (virCommandSet.*Buffer) prior each run. + * + * Moreover, you are required to unlock all mutexes held prior calling + * virCommandWait. Due to current implementation, the virCommandWait + * waits for the event loop to finish all IOs on @cmd. However, if we + * are holding a locked mutex already and the event loop decides to + * issue a different callback which tries to lock the mutex it will + * deadlock and don't call any other callbacks. Not even the one which + * will unlock us. */ void virCommandDoAsyncIO(virCommandPtr cmd) diff --git a/src/util/virfile.c b/src/util/virfile.c index b4765fb..bb33801 100644 --- a/src/util/virfile.c +++ b/src/util/virfile.c @@ -278,6 +278,10 @@ virFileWrapperFdNew(int *fd ATTRIBUTE_UNUSED, * callers can conditionally create a virFileWrapperFd wrapper but * unconditionally call the cleanup code. To avoid deadlock, only * call this after closing the fd resulting from virFileWrapperFdNew(). + * + * Since the virFileWrapperFdNew has requested asynchronous IO on + * underlying virCommand and this uses virCommandWait so we are + * required to unlock all locks held. */ int virFileWrapperFdClose(virFileWrapperFdPtr wfd) -- 1.8.0.2

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[libvirt] Fix bugs of Sheepdog storage driver
by harryxiyou＠gmail.com 07 Feb '13

07 Feb '13

--- src/storage/storage_backend_sheepdog.c | 5 ++++- 1 files changed, 4 insertions(+), 1 deletions(-) diff --git a/src/storage/storage_backend_sheepdog.c b/src/storage/storage_backend_sheepdog.c index cd18f33..2cbfe01 100644 --- a/src/storage/storage_backend_sheepdog.c +++ b/src/storage/storage_backend_sheepdog.c @@ -168,9 +168,12 @@ virStorageBackendSheepdogCreateVol(virConnectPtr conn ATTRIBUTE_UNUSED, virCommandAddArgFormat(cmd, "%llu", vol->capacity); virStorageBackendSheepdogAddHostArg(cmd, pool); ret = virCommandRun(cmd, NULL); + if (ret < 0) + goto cleanup; - virStorageBackendSheepdogRefreshVol(conn, pool, vol); + ret = virStorageBackendSheepdogRefreshVol(conn, pool, vol); +cleanup: virCommandFree(cmd); return ret; } -- 1.7.0.4

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[libvirt] [PATCH 0/5]] S390: Support for native CCW bus
by Viktor Mihajlovski 07 Feb '13

07 Feb '13

Originally, QEMU did not implement a native I/O bus for s390. The initial implementation had a machine type 's390-virtio' featuring a fully paravirtualized I/O system with an artificial bus type 'virtio-s390'. This bus had a number of short-comings, like the need for a non-standard device discovery mechanism, a limited number of devices, limited hotplugging capabilites and the lack of persistent device addresses. To resolve these issues a new machine type 's390-ccw-virtio' has been recently added to QEMU which implementa the native s390 CCW I/O bus. Guests with arch='s390x' and machine='s390-ccw-virtio' can now be defined with up to 262144 virtio devices. This series adds the support for the s390-ccw-virtio machine type and the CCW bus to libvirt. As usual we start with the documentation/schema, the generic configuration stuff, continue with the QEMU driver including device hotplug and finally add qemu2xml testcases. J.B. Joret (1): S390: Add hotplug support for s390 virtio devices Viktor Mihajlovski (4): S390: Documentation for CCW address type S390: domain_conf support for CCW S390: QEMU driver support for CCW addresses S390: Testcases for virtio-ccw machines docs/formatdomain.html.in | 12 + docs/schemas/domaincommon.rng | 21 ++ src/conf/domain_conf.c | 80 +++++- src/conf/domain_conf.h | 16 ++ src/libvirt_private.syms | 1 + src/qemu/qemu_capabilities.c | 47 +++- src/qemu/qemu_capabilities.h | 7 +- src/qemu/qemu_command.c | 269 +++++++++++++++++++- src/qemu/qemu_command.h | 6 + src/qemu/qemu_domain.c | 1 + src/qemu/qemu_domain.h | 3 + src/qemu/qemu_driver.c | 26 +- src/qemu/qemu_hotplug.c | 149 +++++++---- src/qemu/qemu_hotplug.h | 14 +- src/qemu/qemu_process.c | 12 +- .../qemuxml2argv-console-virtio-ccw.args | 10 + .../qemuxml2argv-console-virtio-ccw.xml | 27 ++ .../qemuxml2argv-console-virtio-s390.args | 4 +- .../qemuxml2argv-console-virtio-s390.xml | 2 +- .../qemuxml2argv-disk-virtio-ccw-many.args | 12 + .../qemuxml2argv-disk-virtio-ccw-many.xml | 39 +++ .../qemuxml2argv-disk-virtio-ccw.args | 8 + .../qemuxml2argv-disk-virtio-ccw.xml | 30 +++ .../qemuxml2argv-net-virtio-ccw.args | 8 + .../qemuxml2argv-net-virtio-ccw.xml | 30 +++ tests/qemuxml2argvtest.c | 11 +- tests/testutilsqemu.c | 3 +- 27 files changed, 752 insertions(+), 96 deletions(-) create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-console-virtio-ccw.args create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-console-virtio-ccw.xml create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-disk-virtio-ccw-many.args create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-disk-virtio-ccw-many.xml create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-disk-virtio-ccw.args create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-disk-virtio-ccw.xml create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-net-virtio-ccw.args create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-net-virtio-ccw.xml -- 1.7.9.5

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[libvirt] [PATCH v3 00/13] More refactoring of QEMU driver objects & locking
by Daniel P. Berrange 07 Feb '13

07 Feb '13

An update of https://www.redhat.com/archives/libvir-list/2013-January/msg01407.html This series does more general refactoring to help in the goal of killing the big QEMU driver lock. There are 3 key changes in this series - Isolating all QEMU configuration parameters in one struct. - Making virDomainObjList self-locking - Add dedicated locking to PCI/USB device lists There are all the really hard bits of the QEMU locking. As can be seen from the last patch there is still more work to be done before the QEMU driver lock can be said to be truely dead, but this is less critical. In v3: - Rebase, since previous series no longer applied to GIT In v2: - Rebase, since previous series no longer applied to GIT

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[libvirt] [libvirt-glib] [PATCH 0/3] minor improvements towards Vala usage
by Claudio Bley 07 Feb '13

07 Feb '13

Hi. I'm currently evaluating libvirt-glib using the Vala bindings. I found a few obstacles on the way. Here are some patches. Claudio Bley (3): Fix typo in gvir_config_init's comment Add "transfer none" annotation to argv parameter gvir_stream_receive: annotate buffer parameter with "element-type guint8" libvirt-gconfig/libvirt-gconfig-main.c | 6 +++--- libvirt-glib/libvirt-glib-main.c | 4 ++-- libvirt-gobject/libvirt-gobject-stream.c | 4 ++-- 3 files changed, 7 insertions(+), 7 deletions(-) -- 1.7.11.7

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[libvirt] [PATCH] virCondDestroy: Loose attribute RETURN_CHECK
by Michal Privoznik 07 Feb '13

07 Feb '13

We are wrapping it in ignore_value() anyway. --- src/nwfilter/nwfilter_dhcpsnoop.c | 2 +- src/qemu/qemu_agent.c | 2 +- src/qemu/qemu_domain.c | 6 +++--- src/qemu/qemu_monitor.c | 3 +-- src/rpc/virnetclient.c | 6 +++--- src/util/virthread.h | 2 +- src/util/virthreadpool.c | 6 +++--- tools/console.c | 2 +- 8 files changed, 14 insertions(+), 15 deletions(-) diff --git a/src/nwfilter/nwfilter_dhcpsnoop.c b/src/nwfilter/nwfilter_dhcpsnoop.c index 90b5615..5124069 100644 --- a/src/nwfilter/nwfilter_dhcpsnoop.c +++ b/src/nwfilter/nwfilter_dhcpsnoop.c @@ -636,7 +636,7 @@ virNWFilterSnoopReqFree(virNWFilterSnoopReqPtr req) virNWFilterHashTableFree(req->vars); virMutexDestroy(&req->lock); - ignore_value(virCondDestroy(&req->threadStatusCond)); + virCondDestroy(&req->threadStatusCond); VIR_FREE(req); } diff --git a/src/qemu/qemu_agent.c b/src/qemu/qemu_agent.c index 05641da..ebe777b 100644 --- a/src/qemu/qemu_agent.c +++ b/src/qemu/qemu_agent.c @@ -158,7 +158,7 @@ static void qemuAgentDispose(void *obj) VIR_DEBUG("mon=%p", mon); if (mon->cb && mon->cb->destroy) (mon->cb->destroy)(mon, mon->vm); - ignore_value(virCondDestroy(&mon->notify)); + virCondDestroy(&mon->notify); VIR_FREE(mon->buffer); } diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c index 5bf0ab0..46c22e1 100644 --- a/src/qemu/qemu_domain.c +++ b/src/qemu/qemu_domain.c @@ -133,7 +133,7 @@ qemuDomainObjInitJob(qemuDomainObjPrivatePtr priv) return -1; if (virCondInit(&priv->job.asyncCond) < 0) { - ignore_value(virCondDestroy(&priv->job.cond)); + virCondDestroy(&priv->job.cond); return -1; } @@ -194,8 +194,8 @@ qemuDomainObjTransferJob(virDomainObjPtr obj) static void qemuDomainObjFreeJob(qemuDomainObjPrivatePtr priv) { - ignore_value(virCondDestroy(&priv->job.cond)); - ignore_value(virCondDestroy(&priv->job.asyncCond)); + virCondDestroy(&priv->job.cond); + virCondDestroy(&priv->job.asyncCond); } static bool diff --git a/src/qemu/qemu_monitor.c b/src/qemu/qemu_monitor.c index 3f1aed8..7af571d 100644 --- a/src/qemu/qemu_monitor.c +++ b/src/qemu/qemu_monitor.c @@ -236,8 +236,7 @@ static void qemuMonitorDispose(void *obj) VIR_DEBUG("mon=%p", mon); if (mon->cb && mon->cb->destroy) (mon->cb->destroy)(mon, mon->vm); - if (virCondDestroy(&mon->notify) < 0) - {} + virCondDestroy(&mon->notify); VIR_FREE(mon->buffer); } diff --git a/src/rpc/virnetclient.c b/src/rpc/virnetclient.c index 44638e2..4efa578 100644 --- a/src/rpc/virnetclient.c +++ b/src/rpc/virnetclient.c @@ -1382,7 +1382,7 @@ static bool virNetClientIOEventLoopRemoveDone(virNetClientCallPtr call, VIR_DEBUG("Removing completed call %p", call); if (call->expectReply) VIR_WARN("Got a call expecting a reply but without a waiting thread"); - ignore_value(virCondDestroy(&call->cond)); + virCondDestroy(&call->cond); VIR_FREE(call->msg); VIR_FREE(call); } @@ -1409,7 +1409,7 @@ virNetClientIOEventLoopRemoveAll(virNetClientCallPtr call, return false; VIR_DEBUG("Removing call %p", call); - ignore_value(virCondDestroy(&call->cond)); + virCondDestroy(&call->cond); VIR_FREE(call->msg); VIR_FREE(call); return true; @@ -1972,7 +1972,7 @@ static int virNetClientSendInternal(virNetClientPtr client, if (ret == 1) return 1; - ignore_value(virCondDestroy(&call->cond)); + virCondDestroy(&call->cond); VIR_FREE(call); return ret; } diff --git a/src/util/virthread.h b/src/util/virthread.h index c209440..c59a2cf 100644 --- a/src/util/virthread.h +++ b/src/util/virthread.h @@ -87,7 +87,7 @@ void virMutexUnlock(virMutexPtr m); int virCondInit(virCondPtr c) ATTRIBUTE_RETURN_CHECK; -int virCondDestroy(virCondPtr c) ATTRIBUTE_RETURN_CHECK; +int virCondDestroy(virCondPtr c); /* virCondWait, virCondWaitUntil: * These functions can return without the associated predicate diff --git a/src/util/virthreadpool.c b/src/util/virthreadpool.c index 7b8ba70..e657145 100644 --- a/src/util/virthreadpool.c +++ b/src/util/virthreadpool.c @@ -271,11 +271,11 @@ void virThreadPoolFree(virThreadPoolPtr pool) VIR_FREE(pool->workers); virMutexUnlock(&pool->mutex); virMutexDestroy(&pool->mutex); - ignore_value(virCondDestroy(&pool->quit_cond)); - ignore_value(virCondDestroy(&pool->cond)); + virCondDestroy(&pool->quit_cond); + virCondDestroy(&pool->cond); if (priority) { VIR_FREE(pool->prioWorkers); - ignore_value(virCondDestroy(&pool->prioCond)); + virCondDestroy(&pool->prioCond); } VIR_FREE(pool); } diff --git a/tools/console.c b/tools/console.c index 29873ea..e423134 100644 --- a/tools/console.c +++ b/tools/console.c @@ -407,7 +407,7 @@ int vshRunConsole(virDomainPtr dom, if (con->st) virStreamFree(con->st); virMutexDestroy(&con->lock); - ignore_value(virCondDestroy(&con->cond)); + virCondDestroy(&con->cond); VIR_FREE(con); } -- 1.8.0.2

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[libvirt] [PATCH] qemu: Fix crash when changing media of cdrom or floppy disk
by Osier Yang 07 Feb '13

07 Feb '13

The disk def could be free'ed by qemuDomainChangeEjectableMedia for cdrom or floppy disk. This moves the setup/checking before the attaching takes place. --- src/qemu/qemu_driver.c | 29 ++++++++++++++--------------- src/qemu/qemu_process.c | 16 ++++++++++++---- src/qemu/qemu_process.h | 3 ++- 3 files changed, 28 insertions(+), 20 deletions(-) diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c index 906501b..3509880 100644 --- a/src/qemu/qemu_driver.c +++ b/src/qemu/qemu_driver.c @@ -5829,8 +5829,20 @@ qemuDomainAttachDeviceDiskLive(virConnectPtr conn, if (disk->type == VIR_DOMAIN_DISK_TYPE_BLOCK && disk->shared && - (qemuCheckSharedDisk(driver->sharedDisks, disk) < 0)) - goto end; + disk->src) { + if (qemuCheckSharedDisk(driver->sharedDisks, disk, false) < 0) + goto end; + + if (qemuAddSharedDisk(driver->sharedDisks, disk->src) < 0) { + virReportError(VIR_ERR_INTERNAL_ERROR, + _("Failed to add disk '%s' to shared disk table"), + disk->src); + goto end; + } + } + + if (qemuSetUnprivSGIO(disk) < 0) + goto end; if (qemuDomainDetermineDiskChain(driver, disk, false) < 0) goto end; @@ -5883,19 +5895,6 @@ qemuDomainAttachDeviceDiskLive(virConnectPtr conn, NULLSTR(disk->src)); } - if (ret == 0) { - if (disk->type == VIR_DOMAIN_DISK_TYPE_BLOCK && - disk->shared && - disk->src) { - if (qemuAddSharedDisk(driver->sharedDisks, disk->src) < 0) - VIR_WARN("Failed to add disk '%s' to shared disk table", - disk->src); - } - - if (qemuSetUnprivSGIO(disk) < 0) - VIR_WARN("Failed to set unpriv_sgio of disk '%s'", disk->src); - } - end: if (cgroup) virCgroupFree(&cgroup); diff --git a/src/qemu/qemu_process.c b/src/qemu/qemu_process.c index 98ed552..ee5a10c 100644 --- a/src/qemu/qemu_process.c +++ b/src/qemu/qemu_process.c @@ -3442,7 +3442,14 @@ qemuSetUnprivSGIO(virDomainDiskDefPtr disk) return 0; } -/* Check if a shared disk's setting conflicts with the conf +/* qemuCheckSharedDisk: + * @sharedDisks: Shared disk hash table + * @disk: Disk def + * @after_adding: Whether this function is involked after + * adding the disk to the hash table by + * qemuAddSharedDisk. + * + * Check if a shared disk's setting conflicts with the conf * used by other domain(s). Currently only checks the sgio * setting. Note that this should only be called for disk with * block source. @@ -3451,7 +3458,8 @@ qemuSetUnprivSGIO(virDomainDiskDefPtr disk) */ int qemuCheckSharedDisk(virHashTablePtr sharedDisks, - virDomainDiskDefPtr disk) + virDomainDiskDefPtr disk, + bool after_adding) { int val; size_t *ref = NULL; @@ -3470,7 +3478,7 @@ qemuCheckSharedDisk(virHashTablePtr sharedDisks, if (!(ref = virHashLookup(sharedDisks, key))) goto cleanup; - if (ref == (void *)0x1) + if (after_adding && ref == (void *)0x1) goto cleanup; if (virGetDeviceUnprivSGIO(disk->src, NULL, &val) < 0) { @@ -3846,7 +3854,7 @@ int qemuProcessStart(virConnectPtr conn, if (qemuAddSharedDisk(driver->sharedDisks, disk->src) < 0) goto cleanup; - if (qemuCheckSharedDisk(driver->sharedDisks, disk) < 0) + if (qemuCheckSharedDisk(driver->sharedDisks, disk, true) < 0) goto cleanup; } diff --git a/src/qemu/qemu_process.h b/src/qemu/qemu_process.h index 313fa39..ff294e7 100644 --- a/src/qemu/qemu_process.h +++ b/src/qemu/qemu_process.h @@ -101,6 +101,7 @@ virBitmapPtr qemuPrepareCpumap(virQEMUDriverPtr driver, int qemuSetUnprivSGIO(virDomainDiskDefPtr disk); int qemuCheckSharedDisk(virHashTablePtr sharedDisks, - virDomainDiskDefPtr disk); + virDomainDiskDefPtr disk, + bool after_adding); #endif /* __QEMU_PROCESS_H__ */ -- 1.7.7.6

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[libvirt] [PATCH v3 0/6] Introduce virCommandDoAsyncIO
by Michal Privoznik 07 Feb '13

07 Feb '13

Currently, if we want to use IO with asynchronous command we have to copy code from virFileWrapperFd to misuse our event loop for reading and writing to the command. However, we can extend our virCommand implementation to automatically set things up. All patches but the first has been ACKed already. diff to v2: -even more of Peter's suggestion worked in diff to v1: -drop usleep(100) while waiting for the event loop to process our string IOs and do it ourselves instead. Michal Privoznik (6): virCommand: Introduce virCommandDoAsyncIO Introduce event loop to commandtest tests: Create test for virCommandDoAsyncIO virFileWrapperFd: Switch to new virCommandDoAsyncIO qemu: Catch stderr of image decompression binary qemu: Catch stderr of image compression binary src/libvirt_private.syms | 1 + src/qemu/qemu_driver.c | 5 + src/qemu/qemu_migration.c | 9 +- src/util/vircommand.c | 308 +++++++++++++++++++++++++++++++++++++++++--- src/util/vircommand.h | 1 + src/util/virfile.c | 82 +----------- tests/commanddata/test3.log | 2 +- tests/commandtest.c | 136 +++++++++++++++++++ 8 files changed, 447 insertions(+), 97 deletions(-) -- 1.8.0.2

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[libvirt] [PATCH] qemu: Fix crash when using shared cdrom or floppy disk without source
by Osier Yang 07 Feb '13

07 Feb '13

How to reproduce the crash: * Start a guest with a disk like: <disk type='block' device='cdrom'> <driver name='qemu' type='raw'/> <target dev='hdc' bus='ide'/> <readonly/> <shareable/> <address type='drive' controller='0' bus='1' target='0' unit='0'/> </disk> It's caused by disk->src for this disk is NULL. This patch fixes it. --- src/qemu/qemu_process.c | 8 ++++++-- 1 files changed, 6 insertions(+), 2 deletions(-) diff --git a/src/qemu/qemu_process.c b/src/qemu/qemu_process.c index a2ce007..d1872c0 100644 --- a/src/qemu/qemu_process.c +++ b/src/qemu/qemu_process.c @@ -3837,7 +3837,9 @@ int qemuProcessStart(virConnectPtr conn, _("Raw I/O is not supported on this platform")); #endif - if (disk->type == VIR_DOMAIN_DISK_TYPE_BLOCK && disk->shared) { + if (disk->type == VIR_DOMAIN_DISK_TYPE_BLOCK && + disk->shared && + disk->src) { if (qemuAddSharedDisk(driver->sharedDisks, disk->src) < 0) goto cleanup; @@ -4246,7 +4248,9 @@ void qemuProcessStop(virQEMUDriverPtr driver, for (i = 0; i < vm->def->ndisks; i++) { virDomainDiskDefPtr disk = vm->def->disks[i]; - if (disk->type == VIR_DOMAIN_DISK_TYPE_BLOCK && disk->shared) { + if (disk->type == VIR_DOMAIN_DISK_TYPE_BLOCK && + disk->shared && + disk->src) { ignore_value(qemuRemoveSharedDisk(driver->sharedDisks, disk->src)); } } -- 1.7.7.6

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