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[libvirt] attach/detach device in json mode
by Wen Congyang 17 Mar '11

17 Mar '11

Hi, all The qemu does not support monitor_command drive_add and drive_del in json mode. These two commands are important because attaching/detaching commands need them. AFAIK, if we use libvirt provided by RHEL6(not upstream), we connect to qemu in json mode. So, it is important to make qemu to support these monitor commands in json mode. Markus Armbruster(armbru(a)redhat.com) said these commands are designed badly, and he has started to work on saner commands some time ago: http://lists.nongnu.org/archive/html/qemu-devel/2011-02/msg02042.html He suggested us to use human monitor passthrough in the meantime. Should we modify libvirt to use human monitor passthrough command to support attaching/detaching device before the saner commands are ready?

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[libvirt] [PATCH] macvtap: log an error if on failure to connect to netlink socket
by Laine Stump 16 Mar '11

16 Mar '11

A bug in libnl (see https://bugzilla.redhat.com/show_bug.cgi?id=677724 and https://bugzilla.redhat.com/show_bug.cgi?id=677725) makes it very easy to create a failure to connect to the netlink socket when trying to open a macvtap network device ("type='direct'" in domain interface XML). When that error occurred, there was no log message, leading virsh (for example) to report "unknown error". This patch logs a message which will hopefully be more useful. (All other error exits from the same function were already logging a message). --- src/util/macvtap.c | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-) diff --git a/src/util/macvtap.c b/src/util/macvtap.c index a71db86..66bdc73 100644 --- a/src/util/macvtap.c +++ b/src/util/macvtap.c @@ -127,6 +127,8 @@ int nlComm(struct nl_msg *nl_msg, return -1; if (nl_connect(nlhandle, NETLINK_ROUTE) < 0) { + virReportSystemError(errno, + "%s", _("cannot connect to netlink socket")); rc = -1; goto err_exit; } -- 1.7.3.4

3 5

[libvirt] [PATCH] storage: Fix a problem which will cause libvirtd crashed
by Osier Yang 16 Mar '11

16 Mar '11

--- src/conf/storage_conf.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/src/conf/storage_conf.c b/src/conf/storage_conf.c index 6e3fe0e..13a3622 100644 --- a/src/conf/storage_conf.c +++ b/src/conf/storage_conf.c @@ -396,7 +396,7 @@ virStoragePoolDefParseSource(xmlXPathContextPtr ctxt, char *authType = NULL; int nsource, i; virStoragePoolOptionsPtr options; - char *port; + char *port = NULL; relnode = ctxt->node; ctxt->node = node; -- 1.7.4

2 2

[libvirt] [PATCH 0/5] libvirt/qemu - allow modification of devices in inactive domain
by KAMEZAWA Hiroyuki 16 Mar '11

16 Mar '11

Now, Xen supports at(de)tach-disk, at(de)tach-interface for inactive domains with --perisitent option. (Using --persisten against live domain will cause error.) Now, virsh attach-xxx/detach-xxx cannot modify inactive domains in qemu and --persistent option just returns error. This series adds support for modification of inactive domain's disk, interfaces. Short description 1 ... clean up for Xen's driver 2 ... add my name to AUTHORS 3 ... add --persistent modification support, just a wrapper function. 4 ... add disk support 5 ... add nics support Thanks, -Kame

4 28

[libvirt] Possibly addition to python api binding virDomain class
by Russell Ballestrini 16 Mar '11

16 Mar '11

*In the python bindings of libvirt, could we please add the following code to the virDomain class? * def state(self): """return the state of the dom object""" return self.info()[0] *This helper function would make the world of difference when coding against the libvirt api. * -- *Russell J Ballestrini*

1 0

[libvirt] [PATCH] virsh: Insert error messages to avoid a quiet abortion of commands
by Michal Privoznik 15 Mar '11

15 Mar '11

in case of incorrect option parsing. --- My former patch introduced a regression: https://bugzilla.redhat.com/show_bug.cgi?id=605660 tools/virsh.c | 52 ++++++++++++++++++++++++++++++++++++++-------------- 1 files changed, 38 insertions(+), 14 deletions(-) diff --git a/tools/virsh.c b/tools/virsh.c index b42aac4..42ebd55 100644 --- a/tools/virsh.c +++ b/tools/virsh.c @@ -706,8 +706,10 @@ cmdConnect(vshControl *ctl, const vshCmd *cmd) } VIR_FREE(ctl->name); - if (vshCommandOptString(cmd, "name", &name) <= 0) + if (vshCommandOptString(cmd, "name", &name) < 0) { + vshError(ctl, "%s", _("Please specify valid connection URI")); return FALSE; + } ctl->name = vshStrdup(ctl, name); if (!ro) { @@ -773,7 +775,7 @@ static int cmdConsole(vshControl *ctl, const vshCmd *cmd) { virDomainPtr dom; - int ret; + int ret = FALSE; const char *name = NULL; if (!vshConnectionUsability(ctl, ctl->conn)) @@ -782,11 +784,14 @@ cmdConsole(vshControl *ctl, const vshCmd *cmd) if (!(dom = vshCommandOptDomain(ctl, cmd, NULL))) return FALSE; - if (vshCommandOptString(cmd, "devname", &name) < 0) - return FALSE; + if (vshCommandOptString(cmd, "devname", &name) < 0) { + vshError(ctl, "%s", _("Invalid devname")); + goto cleanup; + } ret = cmdRunConsole(ctl, dom, name); +cleanup: virDomainFree(dom); return ret; } @@ -2410,8 +2415,10 @@ cmdMaxvcpus(vshControl *ctl, const vshCmd *cmd) const char *type = NULL; int vcpus; - if (vshCommandOptString(cmd, "type", &type) < 0) + if (vshCommandOptString(cmd, "type", &type) < 0) { + vshError(ctl, "%s", _("Invalid type")); return FALSE; + } if (!vshConnectionUsability(ctl, ctl->conn)) return FALSE; @@ -2856,8 +2863,10 @@ cmdSetvcpus(vshControl *ctl, const vshCmd *cmd) if (!(dom = vshCommandOptDomain(ctl, cmd, NULL))) return FALSE; - if (vshCommandOptInt(cmd, "count", &count) < 0) - return FALSE; + if (vshCommandOptInt(cmd, "count", &count) < 0) { + vshError(ctl, "%s", _("Invalid number of virtual CPUs")); + goto cleanup; + } if (!flags) { if (virDomainSetVcpus(dom, count) != 0) { @@ -3705,8 +3714,10 @@ doMigrate (void *opaque) if (vshCommandOptString(cmd, "desturi", &desturi) <= 0 || vshCommandOptString(cmd, "migrateuri", &migrateuri) < 0 || - vshCommandOptString(cmd, "dname", &dname) < 0) + vshCommandOptString(cmd, "dname", &dname) < 0) { + vshError(ctl, "%s", _("missing argument")); goto out; + } if (vshCommandOptBool (cmd, "live")) flags |= VIR_MIGRATE_LIVE; @@ -5509,8 +5520,10 @@ static int buildPoolXML(const vshCmd *cmd, const char **retname, char **xml) { vshCommandOptString(cmd, "source-dev", &srcDev) < 0 || vshCommandOptString(cmd, "source-name", &srcName) < 0 || vshCommandOptString(cmd, "source-format", &srcFormat) < 0 || - vshCommandOptString(cmd, "target", &target) < 0) + vshCommandOptString(cmd, "target", &target) < 0) { + vshError(NULL, "%s", _("missing argument")); goto cleanup; + } virBufferVSprintf(&buf, "<pool type='%s'>\n", type); virBufferVSprintf(&buf, " <name>%s</name>\n", name); @@ -6314,8 +6327,10 @@ cmdPoolDiscoverSourcesAs(vshControl * ctl, const vshCmd * cmd ATTRIBUTE_UNUSED) if (vshCommandOptString(cmd, "type", &type) <= 0 || vshCommandOptString(cmd, "host", &host) < 0 || - vshCommandOptString(cmd, "initiator", &initiator) < 0) + vshCommandOptString(cmd, "initiator", &initiator) < 0) { + vshError(ctl,"%s", _("missing argument")); return FALSE; + } if (!vshConnectionUsability(ctl, ctl->conn)) return FALSE; @@ -6386,8 +6401,10 @@ cmdPoolDiscoverSources(vshControl * ctl, const vshCmd * cmd ATTRIBUTE_UNUSED) if (vshCommandOptString(cmd, "type", &type) <= 0) return FALSE; - if (vshCommandOptString(cmd, "srcSpec", &srcSpecFile) < 0) + if (vshCommandOptString(cmd, "srcSpec", &srcSpecFile) < 0) { + vshError(ctl, "%s", _("missing option")); return FALSE; + } if (!vshConnectionUsability(ctl, ctl->conn)) return FALSE; @@ -8862,8 +8879,10 @@ cmdAttachInterface(vshControl *ctl, const vshCmd *cmd) vshCommandOptString(cmd, "target", &target) < 0 || vshCommandOptString(cmd, "mac", &mac) < 0 || vshCommandOptString(cmd, "script", &script) < 0 || - vshCommandOptString(cmd, "model", &model) < 0) + vshCommandOptString(cmd, "model", &model) < 0) { + vshError(ctl, "missing argument"); goto cleanup; + } /* check interface type */ if (STREQ(type, "network")) { @@ -8969,8 +8988,10 @@ cmdDetachInterface(vshControl *ctl, const vshCmd *cmd) if (vshCommandOptString(cmd, "type", &type) <= 0) goto cleanup; - if (vshCommandOptString(cmd, "mac", &mac) < 0) + if (vshCommandOptString(cmd, "mac", &mac) < 0) { + vshError(ctl, "%s", _("missing option")); goto cleanup; + } doc = virDomainGetXMLDesc(dom, 0); if (!doc) @@ -9120,6 +9141,7 @@ cmdAttachDisk(vshControl *ctl, const vshCmd *cmd) vshCommandOptString(cmd, "type", &type) < 0 || vshCommandOptString(cmd, "mode", &mode) < 0 || vshCommandOptString(cmd, "sourcetype", &stype) < 0) { + vshError(ctl, "%s", _("missing option")); goto cleanup; } @@ -11272,8 +11294,10 @@ vshCommandOptVolBy(vshControl *ctl, const vshCmd *cmd, if (vshCommandOptString(cmd, optname, &n) <= 0) return NULL; - if (vshCommandOptString(cmd, pooloptname, &p) < 0) + if (vshCommandOptString(cmd, pooloptname, &p) < 0) { + vshError(ctl, "%s", _("missing option")); return NULL; + } if (p) pool = vshCommandOptPoolBy(ctl, cmd, pooloptname, name, flag); -- 1.7.4

3 5

[libvirt] [PATCH] Ensure binary is resolved wrt $PATH in virExec
by Daniel P. Berrange 15 Mar '11

15 Mar '11

virExec would only resolved the binary to $PATH if no env variables were being set. Since there is no execvep() API in POSIX, we use virFindFileInPath to manually resolve the binary and then use execv() instead of execvp(). --- src/util/util.c | 16 ++++++++++++++-- 1 files changed, 14 insertions(+), 2 deletions(-) diff --git a/src/util/util.c b/src/util/util.c index e573f4a..a30a542 100644 --- a/src/util/util.c +++ b/src/util/util.c @@ -475,6 +475,18 @@ __virExec(const char *const*argv, int childout = -1; int childerr = -1; int tmpfd; + const char *binary = NULL; + + if (argv[0][0] != '/') { + if (!(binary = virFindFileInPath(argv[0]))) { + virReportSystemError(ENOENT, + _("Cannot find '%s' in path"), + argv[0]); + return -1; + } + } else { + binary = argv[0]; + } if ((null = open("/dev/null", O_RDWR)) < 0) { virReportSystemError(errno, @@ -694,9 +706,9 @@ __virExec(const char *const*argv, virLogReset(); if (envp) - execve(argv[0], (char **) argv, (char**)envp); + execve(binary, (char **) argv, (char**)envp); else - execvp(argv[0], (char **) argv); + execv(binary, (char **) argv); virReportSystemError(errno, _("cannot execute binary %s"), -- 1.7.4

2 1

[libvirt] [PATCH] qemu: Fallback to HMP when cpu_set QMP command is not found
by Wen Congyang 15 Mar '11

15 Mar '11

--- src/qemu/qemu_monitor_json.c | 12 ++++++++---- 1 files changed, 8 insertions(+), 4 deletions(-) diff --git a/src/qemu/qemu_monitor_json.c b/src/qemu/qemu_monitor_json.c index a839ffe..13d12c8 100644 --- a/src/qemu/qemu_monitor_json.c +++ b/src/qemu/qemu_monitor_json.c @@ -1450,7 +1450,14 @@ int qemuMonitorJSONSetCPU(qemuMonitorPtr mon, if (!cmd) return -1; - ret = qemuMonitorJSONCommand(mon, cmd, &reply); + if ((ret = qemuMonitorJSONCommand(mon, cmd, &reply)) < 0) + goto cleanup; + + if (qemuMonitorJSONHasError(reply, "CommandNotFound")) { + VIR_DEBUG0("cpu_set command not found, trying HMP"); + ret = qemuMonitorTextSetCPU(mon, cpu, online); + goto cleanup; + } if (ret == 0) { /* XXX See if CPU soft-failed due to lack of ACPI */ @@ -1468,10 +1475,7 @@ int qemuMonitorJSONSetCPU(qemuMonitorPtr mon, ret = 1; } -#if 0 cleanup: -#endif - virJSONValueFree(cmd); virJSONValueFree(reply); return ret; -- 1.7.1

2 1

[libvirt] [PATCH] qemu: Check the unsigned integer overflow
by Osier Yang 15 Mar '11

15 Mar '11

As perhaps other hypervisor drivers use different capacity units, do the checking in qemu driver instead of in conf/domain_conf.c. --- src/qemu/qemu_command.c | 7 +++++++ 1 files changed, 7 insertions(+), 0 deletions(-) diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c index 198a4e2..42be6ee 100644 --- a/src/qemu/qemu_command.c +++ b/src/qemu/qemu_command.c @@ -1933,6 +1933,13 @@ qemuBuildVideoDevStr(virDomainVideoDefPtr video, virBufferVSprintf(&buf, ",id=%s", video->info.alias); if (video->type == VIR_DOMAIN_VIDEO_TYPE_QXL) { + if (video->vram > (UINT_MAX / 1024)) { + qemuReportError(VIR_ERR_INTERNAL_ERROR, + _("value for 'vram' must be less than '%u'"), + UINT_MAX / 1024); + goto error; + } + /* QEMU accepts bytes for vram_size. */ virBufferVSprintf(&buf, ",vram_size=%u", video->vram * 1024); } -- 1.7.4

3 5

[libvirt] [PATCH] Add compat function for geteuid()
by Daniel P. Berrange 15 Mar '11

15 Mar '11

* configure.ac: Check for geteuid() * src/util/util.h: Compat for geteuid() --- configure.ac | 2 +- src/util/util.h | 4 ++++ 2 files changed, 5 insertions(+), 1 deletions(-) diff --git a/configure.ac b/configure.ac index a58ee4e..e2b2b24 100644 --- a/configure.ac +++ b/configure.ac @@ -120,7 +120,7 @@ AC_MSG_RESULT([$have_cpuid]) dnl Availability of various common functions (non-fatal if missing), dnl and various less common threadsafe functions AC_CHECK_FUNCS_ONCE([cfmakeraw regexec sched_getaffinity getuid getgid \ - initgroups posix_fallocate mmap kill \ + geteuid initgroups posix_fallocate mmap kill \ getmntent_r getgrnam_r getpwuid_r]) dnl Availability of pthread functions (if missing, win32 threading is diff --git a/src/util/util.h b/src/util/util.h index 31c3a33..276e259 100644 --- a/src/util/util.h +++ b/src/util/util.h @@ -269,6 +269,10 @@ const char *virEnumToString(const char *const*types, static inline int getuid (void) { return 0; } # endif +# ifndef HAVE_GETUID +static inline int geteuid (void) { return 0; } +# endif + # ifndef HAVE_GETGID static inline int getgid (void) { return 0; } # endif -- 1.7.4

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