March 2015 - Devel - libvirt List Archives

[libvirt] [PATCH] Strip control codes in virBufferEscapeString
by Ján Tomko 31 Mar '15

31 Mar '15

These cannot be represented in XML. We have been stripping them, but only if the string had characters that needed escaping: <>"'& Extend the strcspn check to include control codes, and strip them even if we don't do any escaping. https://bugzilla.redhat.com/show_bug.cgi?id=1184131 https://bugzilla.redhat.com/show_bug.cgi?id=1066564 --- src/util/virbuffer.c | 14 +++++++++++--- tests/virbuftest.c | 49 +++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 60 insertions(+), 3 deletions(-) diff --git a/src/util/virbuffer.c b/src/util/virbuffer.c index 706dbfa..3d13c90 100644 --- a/src/util/virbuffer.c +++ b/src/util/virbuffer.c @@ -438,6 +438,13 @@ virBufferEscapeString(virBufferPtr buf, const char *format, const char *str) int len; char *escaped, *out; const char *cur; + const char forbidden_characters[] = { + 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, + /*\t*/ /*\n*/ 0x0B, 0x0C, /*\r*/ 0x0E, 0x0F, 0x10, + 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, + 0x19, '"', '&', '\'', '<', '>', + '\0' + }; if ((format == NULL) || (buf == NULL) || (str == NULL)) return; @@ -446,7 +453,7 @@ virBufferEscapeString(virBufferPtr buf, const char *format, const char *str) return; len = strlen(str); - if (strcspn(str, "<>&'\"") == len) { + if (strcspn(str, forbidden_characters) == len) { virBufferAsprintf(buf, format, str); return; } @@ -490,8 +497,7 @@ virBufferEscapeString(virBufferPtr buf, const char *format, const char *str) *out++ = 'o'; *out++ = 's'; *out++ = ';'; - } else if (((unsigned char)*cur >= 0x20) || (*cur == '\n') || (*cur == '\t') || - (*cur == '\r')) { + } else if (!strchr(forbidden_characters, *cur)) { /* * default case, just copy ! * Note that character over 0x80 are likely to give problem @@ -499,6 +505,8 @@ virBufferEscapeString(virBufferPtr buf, const char *format, const char *str) * it's hard to handle properly we have to assume it's UTF-8 too */ *out++ = *cur; + } else { + /* silently ignore control characters */ } cur++; } diff --git a/tests/virbuftest.c b/tests/virbuftest.c index 21cb18b..10398d5 100644 --- a/tests/virbuftest.c +++ b/tests/virbuftest.c @@ -349,6 +349,39 @@ testBufAddStr(const void *opaque ATTRIBUTE_UNUSED) static int +testBufEscapeStr(const void *opaque ATTRIBUTE_UNUSED) +{ + const struct testBufAddStrData *data = opaque; + virBuffer buf = VIR_BUFFER_INITIALIZER; + char *actual; + int ret = -1; + + virBufferAddLit(&buf, "<c>\n"); + virBufferAdjustIndent(&buf, 2); + virBufferEscapeString(&buf, "<el>%s</el>\n", data->data); + virBufferAdjustIndent(&buf, -2); + virBufferAddLit(&buf, "</c>"); + + if (!(actual = virBufferContentAndReset(&buf))) { + TEST_ERROR("buf is empty"); + goto cleanup; + } + + if (STRNEQ_NULLABLE(actual, data->expect)) { + TEST_ERROR("testBufEscapeStr(): Strings don't match:\n"); + virtTestDifference(stderr, data->expect, actual); + goto cleanup; + } + + ret = 0; + + cleanup: + VIR_FREE(actual); + return ret; +} + + +static int mymain(void) { int ret = 0; @@ -379,6 +412,22 @@ mymain(void) DO_TEST_ADD_STR("<a/>\n", "<c>\n <a/>\n</c>"); DO_TEST_ADD_STR("<b>\n <a/>\n</b>\n", "<c>\n <b>\n <a/>\n </b>\n</c>"); +#define DO_TEST_ESCAPE(data, expect) \ + do { \ + struct testBufAddStrData info = { data, expect }; \ + if (virtTestRun("Buf: EscapeStr", testBufEscapeStr, &info) < 0) \ + ret = -1; \ + } while (0) + + DO_TEST_ESCAPE("<td></td><td></td>", + "<c>\n <el><td></td><td></td></el>\n</c>"); + DO_TEST_ESCAPE("\007\"&&\"\x15", + "<c>\n <el>"&&"</el>\n</c>"); + DO_TEST_ESCAPE(",,'..',,", + "<c>\n <el>,,'..',,</el>\n</c>"); + DO_TEST_ESCAPE("\x01\x01\x02\x03\x05\x08", + "<c>\n <el></el>\n</c>"); + return ret == 0 ? EXIT_SUCCESS : EXIT_FAILURE; } -- 2.0.5

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[libvirt] [PATCH] qemu: blockCopy: Pass adjusted bandwidth when called via blockRebase
by Peter Krempa 31 Mar '15

31 Mar '15

The block copy API takes the speed in bytes/s rather than MiB/s that was the prior approach in virDomainBlockRebase. We correctly converted the speed to bytes/s in the old API but we still called the common helper virDomainBlockCopyCommon with the unadjusted variable. Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1207122 --- src/qemu/qemu_driver.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c index 4d05221..6700fc9 100644 --- a/src/qemu/qemu_driver.c +++ b/src/qemu/qemu_driver.c @@ -16811,7 +16811,7 @@ qemuDomainBlockRebase(virDomainPtr dom, const char *path, const char *base, flags &= (VIR_DOMAIN_BLOCK_REBASE_SHALLOW | VIR_DOMAIN_BLOCK_REBASE_REUSE_EXT); ret = qemuDomainBlockCopyCommon(vm, dom->conn, path, dest, - bandwidth, 0, 0, flags, true); + speed, 0, 0, flags, true); dest = NULL; cleanup: -- 2.2.2

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[libvirt] [PATCH 0/6] Few NUMA fixes
by Michal Privoznik 30 Mar '15

30 Mar '15

The heart of the patchset are the last two patches. Long story short, if a domain is configured to be pinned onto a set of NUMA nodes stricly, we use both CGroups and numa_set_membind(). While we can change the former later on a user's wish, we can't change the latter. Therefore, any subsequent memory enlargement (e.g. via virsh setmem $dom) will result in memory still being allocated from old NUMA nodes and OOM killer interference is likely to occur. Michal Privoznik (6): virCgroupNewPartition: Fix comment virCgroupNew: Enhance debug message virCgroupController: Check the enum fits into 'int' qemuDomainGetNumaParameters: Check for the correct CGroup controller qemuProcessHook: Call virNuma*() iff needed virLXCControllerSetupResourceLimits: Call virNuma*() iff needed src/lxc/lxc_controller.c | 31 +++++++++++++++++++++++++------ src/qemu/qemu_driver.c | 2 +- src/qemu/qemu_process.c | 32 ++++++++++++++++++++++++++++---- src/util/vircgroup.c | 6 +++--- src/util/vircgroup.h | 5 +++++ 5 files changed, 62 insertions(+), 14 deletions(-) -- 2.0.5

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[libvirt] [PATCH] interface: allow multiple IPv4 addresses in interface XML
by Laine Stump 30 Mar '15

30 Mar '15

An upcoming netcf release will support multiple ipv4 addresses, so let's loosen up libvirt's interface.rng to allow it. --- docs/schemas/interface.rng | 14 ++++++++------ 1 file changed, 8 insertions(+), 6 deletions(-) diff --git a/docs/schemas/interface.rng b/docs/schemas/interface.rng index bf0346c..45b40cd 100644 --- a/docs/schemas/interface.rng +++ b/docs/schemas/interface.rng @@ -326,12 +326,14 @@ <choice> <ref name="dhcp-element"/> <group> - <element name="ip"> - <attribute name="address"><ref name="ipv4Addr"/></attribute> - <optional> - <attribute name="prefix"><ref name="ipv4Prefix"/></attribute> - </optional> - </element> + <oneOrMore> + <element name="ip"> + <attribute name="address"><ref name="ipv4Addr"/></attribute> + <optional> + <attribute name="prefix"><ref name="ipv4Prefix"/></attribute> + </optional> + </element> + </oneOrMore> <optional> <element name="route"> <attribute name="gateway"><ref name="ipv4Addr"/></attribute> -- 2.1.0

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[libvirt] ceph rbd key
by Raymond Durand 30 Mar '15

30 Mar '15

Is there a way that qemu takes the key of ceph rbd from a file rather than reading it from the file cinder.conf? Going from something like rbd_secret_uuid=UUID key to something like rbd_secret_uuid=/path/to/key (to restrict the access rights to the file and avoid the secret_uuid to be readable from anyone with ps kind of command) Regards,

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[libvirt] [RFC] Add uptime to API returning Dom Info
by Nehal J Wani 30 Mar '15

30 Mar '15

This is an attempt to fix: https://bugzilla.redhat.com/show_bug.cgi?id=812911 Calculate vm uptime by subtracting process starttime from system uptime: Almost equivalent to: echo $(($(($(awk '{print $1}' /proc/uptime)*1e9 - $(($(cut -d " " -f22 /proc/$PID/stat)*1e7))))/(1.0 * 1e9))) --- include/libvirt/libvirt-domain.h | 1 + src/qemu/qemu_driver.c | 32 +++++++++++++++++++++++++------- src/remote/remote_protocol.x | 1 + src/remote_protocol-structs | 1 + tools/virsh-domain-monitor.c | 8 ++++++++ 5 files changed, 36 insertions(+), 7 deletions(-) diff --git a/include/libvirt/libvirt-domain.h b/include/libvirt/libvirt-domain.h index 7be4219..2df0241 100644 --- a/include/libvirt/libvirt-domain.h +++ b/include/libvirt/libvirt-domain.h @@ -275,6 +275,7 @@ struct _virDomainInfo { unsigned long memory; /* the memory in KBytes used by the domain */ unsigned short nrVirtCpu; /* the number of virtual CPUs for the domain */ unsigned long long cpuTime; /* the CPU time used in nanoseconds */ + unsigned long long upTime; /* the total uptime in nanoseconds */ }; /** diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c index f07e4fb..0b5098f 100644 --- a/src/qemu/qemu_driver.c +++ b/src/qemu/qemu_driver.c @@ -1309,11 +1309,12 @@ static char *qemuConnectGetCapabilities(virConnectPtr conn) { static int qemuGetProcessInfo(unsigned long long *cpuTime, int *lastCpu, long *vm_rss, - pid_t pid, int tid) + pid_t pid, int tid, unsigned long long *upTime) { char *proc; FILE *pidinfo; - unsigned long long usertime = 0, systime = 0; + unsigned long long usertime = 0, systime = 0, starttime = 0; + double _uptime; long rss = 0; int cpu = 0; int ret; @@ -1337,13 +1338,29 @@ qemuGetProcessInfo(unsigned long long *cpuTime, int *lastCpu, long *vm_rss, /* pid -> stime */ "%*d %*s %*c %*d %*d %*d %*d %*d %*u %*u %*u %*u %*u %llu %llu" /* cutime -> endcode */ - "%*d %*d %*d %*d %*d %*d %*u %*u %ld %*u %*u %*u" + "%*d %*d %*d %*d %*d %*d %llu %*u %ld %*u %*u %*u" /* startstack -> processor */ "%*u %*u %*u %*u %*u %*u %*u %*u %*u %*u %*d %d", - &usertime, &systime, &rss, &cpu) != 4) { + &usertime, &systime, &starttime, &rss, &cpu) != 5) { VIR_WARN("cannot parse process status data"); } + ret = virAsprintf(&proc, "/proc/uptime"); + if (ret < 0) + return -1; + + pidinfo = fopen(proc, "r"); + VIR_FREE(proc); + + if (!pidinfo || fscanf(pidinfo, "%lf %*f", &_uptime) != 1) { + VIR_WARN("cannot parse machine uptime data"); + } + + if (upTime) + *upTime = 1000ull * 1000ull * 1000ull * _uptime - + (1000ull * 1000ull * 1000ull * starttime) + / (unsigned long long)sysconf(_SC_CLK_TCK); + /* We got jiffies * We want nanoseconds * _SC_CLK_TCK is jiffies per second @@ -1404,7 +1421,8 @@ qemuDomainHelperGetVcpus(virDomainObjPtr vm, virVcpuInfoPtr info, int maxinfo, &(info[i].cpu), NULL, vm->pid, - priv->vcpupids[i]) < 0) { + priv->vcpupids[i], + NULL) < 0) { virReportSystemError(errno, "%s", _("cannot get vCPU placement & pCPU time")); return -1; @@ -2595,7 +2613,7 @@ static int qemuDomainGetInfo(virDomainPtr dom, if (!virDomainObjIsActive(vm)) { info->cpuTime = 0; } else { - if (qemuGetProcessInfo(&(info->cpuTime), NULL, NULL, vm->pid, 0) < 0) { + if (qemuGetProcessInfo(&(info->cpuTime), NULL, NULL, vm->pid, 0, &(info->upTime)) < 0) { virReportError(VIR_ERR_OPERATION_FAILED, "%s", _("cannot read cputime for domain")); goto cleanup; @@ -11474,7 +11492,7 @@ qemuDomainMemoryStats(virDomainPtr dom, if (ret >= 0 && ret < nr_stats) { long rss; - if (qemuGetProcessInfo(NULL, NULL, &rss, vm->pid, 0) < 0) { + if (qemuGetProcessInfo(NULL, NULL, &rss, vm->pid, 0, NULL) < 0) { virReportError(VIR_ERR_OPERATION_FAILED, "%s", _("cannot get RSS for domain")); } else { diff --git a/src/remote/remote_protocol.x b/src/remote/remote_protocol.x index d90e6b5..193f501 100644 --- a/src/remote/remote_protocol.x +++ b/src/remote/remote_protocol.x @@ -901,6 +901,7 @@ struct remote_domain_get_info_ret { /* insert@1 */ unsigned hyper memory; unsigned short nrVirtCpu; unsigned hyper cpuTime; + unsigned hyper upTime; }; struct remote_domain_save_args { diff --git a/src/remote_protocol-structs b/src/remote_protocol-structs index e614f77..1f54d5d 100644 --- a/src/remote_protocol-structs +++ b/src/remote_protocol-structs @@ -531,6 +531,7 @@ struct remote_domain_get_info_ret { uint64_t memory; u_short nrVirtCpu; uint64_t cpuTime; + uint64_t upTime; }; struct remote_domain_save_args { remote_nonnull_domain dom; diff --git a/tools/virsh-domain-monitor.c b/tools/virsh-domain-monitor.c index 6951db2..027790f 100644 --- a/tools/virsh-domain-monitor.c +++ b/tools/virsh-domain-monitor.c @@ -1246,6 +1246,14 @@ cmdDominfo(vshControl *ctl, const vshCmd *cmd) vshPrint(ctl, "%-15s %.1lfs\n", _("CPU time:"), cpuUsed); } + if (info.upTime != 0) { + double upTime = info.upTime; + + upTime /= 1000000000.0; + + vshPrint(ctl, "%-15s %.1lfs\n", _("Uptime:"), upTime); + } + if (info.maxMem != UINT_MAX) vshPrint(ctl, "%-15s %lu KiB\n", _("Max memory:"), info.maxMem); -- 2.1.0

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[libvirt] [PATCH] qemu: fix crash in qemuProcessAutoDestroy
by Michael Chapman 30 Mar '15

30 Mar '15

The destination libvirt daemon in a migration may segfault if the client disconnects immediately after the migration has begun: # virsh -c qemu+tls://remote/system list --all Id Name State ---------------------------------------------------- ... # timeout --signal KILL 1 \ virsh migrate example qemu+tls://remote/system \ --verbose --compressed --live --auto-converge \ --abort-on-error --unsafe --persistent \ --undefinesource --copy-storage-all --xml example.xml Killed # virsh -c qemu+tls://remote/system list --all error: failed to connect to the hypervisor error: unable to connect to server at 'remote:16514': Connection refused The crash is in: 1531 void 1532 qemuDomainObjEndJob(virQEMUDriverPtr driver, virDomainObjPtr obj) 1533 { 1534 qemuDomainObjPrivatePtr priv = obj->privateData; 1535 qemuDomainJob job = priv->job.active; 1536 1537 priv->jobs_queued--; Backtrace: #0 at qemuDomainObjEndJob at qemu/qemu_domain.c:1537 #1 in qemuDomainRemoveInactive at qemu/qemu_domain.c:2497 #2 in qemuProcessAutoDestroy at qemu/qemu_process.c:5646 #3 in virCloseCallbacksRun at util/virclosecallbacks.c:350 #4 in qemuConnectClose at qemu/qemu_driver.c:1154 ... qemuDomainRemoveInactive calls virDomainObjListRemove, which in this case is holding the last remaining reference to the domain. qemuDomainRemoveInactive then calls qemuDomainObjEndJob, but the domain object has been freed and poisoned by then. This patch bumps the domain's refcount until qemuDomainRemoveInactive has completed. We also ensure qemuProcessAutoDestroy does not return the domain to virCloseCallbacksRun to be unlocked in this case. There is similar logic in bhyveProcessAutoDestroy and lxcProcessAutoDestroy (which call virDomainObjListRemove directly). Signed-off-by: Michael Chapman <mike(a)very.puzzling.org> --- src/qemu/qemu_domain.c | 5 +++++ src/qemu/qemu_process.c | 4 +++- 2 files changed, 8 insertions(+), 1 deletion(-) diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c index 758fcd9..0ae4693 100644 --- a/src/qemu/qemu_domain.c +++ b/src/qemu/qemu_domain.c @@ -2487,11 +2487,16 @@ qemuDomainRemoveInactive(virQEMUDriverPtr driver, VIR_WARN("unable to remove snapshot directory %s", snapDir); VIR_FREE(snapDir); } + + virObjectRef(vm); + virDomainObjListRemove(driver->domains, vm); virObjectUnref(cfg); if (haveJob) qemuDomainObjEndJob(driver, vm); + + virObjectUnref(vm); } void diff --git a/src/qemu/qemu_process.c b/src/qemu/qemu_process.c index 79f763e..fe987c8 100644 --- a/src/qemu/qemu_process.c +++ b/src/qemu/qemu_process.c @@ -5642,8 +5642,10 @@ qemuProcessAutoDestroy(virDomainObjPtr dom, qemuDomainObjEndJob(driver, dom); - if (!dom->persistent) + if (!dom->persistent) { qemuDomainRemoveInactive(driver, dom); + dom = NULL; + } if (event) qemuDomainEventQueue(driver, event); -- 2.1.0

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[libvirt] [PATCH] build: avoid variable named 'interface', for mingw
by Eric Blake 29 Mar '15

29 Mar '15

Commit 2f36e6944 (re-)introduced a use of an identifier 'interface', which causes this build failure on mingw: ../../tools/virsh-domain-monitor.c: In function 'cmdDomIfAddr': ../../tools/virsh-domain-monitor.c:2233:17: error: expected identifier or '(' before 'struct' const char *interface = NULL; ^ See also commit 6512c8b. Sadly, I'm not quite sure how to write a syntax check that can poison the use of this identifier. * tools/virsh-domain-monitor.c (cmdDomIfAddr): Use ifacestr instead. Signed-off-by: Eric Blake <eblake(a)redhat.com> --- Pushing under the build-breaker rule. tools/virsh-domain-monitor.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/tools/virsh-domain-monitor.c b/tools/virsh-domain-monitor.c index d307881..6951db2 100644 --- a/tools/virsh-domain-monitor.c +++ b/tools/virsh-domain-monitor.c @@ -1,7 +1,7 @@ /* * virsh-domain-monitor.c: Commands to monitor domain status * - * Copyright (C) 2005, 2007-2014 Red Hat, Inc. + * Copyright (C) 2005, 2007-2015 Red Hat, Inc. * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public @@ -2230,7 +2230,7 @@ static bool cmdDomIfAddr(vshControl *ctl, const vshCmd *cmd) { virDomainPtr dom = NULL; - const char *interface = NULL; + const char *ifacestr = NULL; virDomainInterfacePtr *ifaces = NULL; size_t i, j; int ifaces_count = 0; @@ -2242,7 +2242,7 @@ cmdDomIfAddr(vshControl *ctl, const vshCmd *cmd) if (!(dom = vshCommandOptDomain(ctl, cmd, NULL))) return false; - if (vshCommandOptString(cmd, "interface", &interface) < 0) + if (vshCommandOptString(cmd, "interface", &ifacestr) < 0) goto cleanup; if (vshCommandOptString(cmd, "source", &sourcestr) < 0) goto cleanup; @@ -2273,7 +2273,7 @@ cmdDomIfAddr(vshControl *ctl, const vshCmd *cmd) char *ip_addr_str = NULL; const char *type = NULL; - if (interface && STRNEQ(interface, iface->name)) + if (ifacestr && STRNEQ(ifacestr, iface->name)) continue; /* When the interface has no IP address */ -- 2.1.0

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[libvirt] Instances
by Dave Sayles 29 Mar '15

29 Mar '15

I'm running libvirt with qemu-kvm underneath. My network stack has the eth0 interface which is bridged to a br0 interface. Usually, when a VM starts up, a new "vnet" interface is created as well by libvirt. That vnet interface has a matching HWaddr to the VM that was spun up with it, so I'm assuming they're associated somehow. Sometimes, after using libvirt's "virt-install" to create a VM, I'm unable to "virsh start" it. Virsh will print this out to stderr that it couldn't start that VM, since the connection was "Reset by peer". I've yet to find a repro case for this issue. Eventually, I am able to "virsh start" the instance, but only after several minutes. Are there any known issues with libvirt/qemu-kvm failing to instantiate network devices when it spins up VMs? This is printed to the logs as well: Mar 27 16:21:07 localhost kernel: device vnet42 entered promiscuous mode Mar 27 16:21:07 localhost kernel: br0: port 44(vnet42) entering forwarding state Mar 27 16:21:07 localhost logger: KVM: 43 guests now active Mar 27 16:21:08 localhost kernel: br0: port 44(vnet42) entering disabled state Mar 27 16:21:08 localhost kernel: device vnet42 left promiscuous mode Mar 27 16:21:08 localhost kernel: br0: port 44(vnet42) entering disabled state Mar 27 16:21:08 localhost logger: KVM: 42 guests now active

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Re: [libvirt] GSoC/OPW:Problems Compilling libvirt
by Noella Ashu 29 Mar '15

29 Mar '15

Hello Yandong, (1)As I known, before compiling libvirt, some packages should be installed. > > sudo apt-get install gcc make pkg-config libxml2-dev libgnutils-dev > libdevmapper-dev libcur l4-gnutls-dev python-dev libpciaccess-dev > libxen-dev libnl-dev > > I just ran $yum builddep libvirt and it installed all the dependencies for libvirt. I have successfully compiled libvirt. I'll select some bugs to start working on. Thanks, > >> > > > -- > ---------------------------------------------------------- > regards, > yandong > >

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