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[libvirt] [libvirt-sandbox][PATCH v2] Avoid segfault in gvir_sandbox_config_add_host_include_file
by Alex Jia 28 Mar '13

28 Mar '13

RHBZ: https://bugzilla.redhat.com/show_bug.cgi?id=924574 Valgrind defects memory error: ==19297== Invalid free() / delete / delete[] / realloc() ==19297== at 0x4A077A6: free (vg_replace_malloc.c:446) ==19297== by 0x350F24D79E: g_free (in /usr/lib64/libglib-2.0.so.0.3400.2) ==19297== by 0x4C2C03F: gvir_sandbox_config_add_host_include_file (libvirt-sandbox-config.c:1319) ==19297== by 0x401FB7: main (virt-sandbox.c:171) ==19297== Address 0x4f2094c is 12 bytes inside a block of size 18 alloc'd ==19297== at 0x4A0883C: malloc (vg_replace_malloc.c:270) ==19297== by 0x350F24D68E: g_malloc (in /usr/lib64/libglib-2.0.so.0.3400.2) ==19297== by 0x350F263F0B: g_strdup (in /usr/lib64/libglib-2.0.so.0.3400.2) ==19297== by 0x4C2BF95: gvir_sandbox_config_add_host_include_file (libvirt-sandbox-config.c:1292) ==19297== by 0x401FB7: main (virt-sandbox.c:171) Signed-off-by: Alex Jia <ajia(a)redhat.com> --- libvirt-sandbox/libvirt-sandbox-config.c | 7 +++++-- 1 files changed, 5 insertions(+), 2 deletions(-) diff --git a/libvirt-sandbox/libvirt-sandbox-config.c b/libvirt-sandbox/libvirt-sandbox-config.c index fc852f5..a98f40b 100644 --- a/libvirt-sandbox/libvirt-sandbox-config.c +++ b/libvirt-sandbox/libvirt-sandbox-config.c @@ -1337,6 +1337,7 @@ gboolean gvir_sandbox_config_add_host_include_file(GVirSandboxConfig *config, error))) { const gchar *host; gchar *guest; + const gchar *relguest; GVirSandboxConfigMount *mnt = NULL; GList *mnts = NULL; gchar *tmp; @@ -1354,8 +1355,10 @@ gboolean gvir_sandbox_config_add_host_include_file(GVirSandboxConfig *config, mnt = GVIR_SANDBOX_CONFIG_MOUNT(mnts->data); const gchar *target = gvir_sandbox_config_mount_get_target(mnt); if (g_str_has_prefix(guest, target)) { - guest = guest + strlen(target); + relguest = guest + strlen(target); break; + } else { + relguest = guest; } mnt = NULL; mnts = mnts->next; @@ -1367,7 +1370,7 @@ gboolean gvir_sandbox_config_add_host_include_file(GVirSandboxConfig *config, return FALSE; } - gvir_sandbox_config_mount_add_include(GVIR_SANDBOX_CONFIG_MOUNT(mnt), host, guest); + gvir_sandbox_config_mount_add_include(GVIR_SANDBOX_CONFIG_MOUNT(mnt), host, relguest); g_free(guest); g_free(line); } -- 1.7.1

2 2

[libvirt] [PATCH 0/5] Add domain modification impact flags to hot-management commands
by Peter Krempa 28 Mar '13

28 Mar '13

As promised in the RFC, this series adds the --live, --config, --current and --persistent flags to virsh commands that were lacking them. Peter Krempa (5): virsh-domain: Fix declarations of flag variables in cmdChangeMedia virsh: Fix semantics of --config for "update-device" command virsh-domain: Add --live, --config, --current logic to cmdDetachInterface virsh-domain: Add --live, --config, --current logic to cmdDetachDevice virsh-domain: Add --live, --config, --current logic to cmdDetachDisk tools/virsh-domain.c | 225 ++++++++++++++++++++++++++++++++++++--------------- tools/virsh.pod | 66 ++++++++++----- 2 files changed, 206 insertions(+), 85 deletions(-) -- 1.8.1.5

4 14

[libvirt] ocaml: prototype bindings for event callbacks
by David Scott 28 Mar '13

28 Mar '13

Hi, I've made an prototype set of ocaml bindings for the libvirt event mechanism -- here is what I've got so far. It's possible to register for all the types supported by virConnectDomainEventRegisterAny I've not tested each type of event yet, but the basics are all working. For every distinct callback function signature it maintains: 1. OCaml: a hashtable mapping callback_id (int64) to a specific closure 2. OCaml: a function registered with Callback.register 3. C: a function registered with libvirt, which upcalls to OCaml There's still some missing polish, for example I've not implemented a means to actually deregister a callback :-) I thought it would be best to get feedback on the overall approach, style of the mapping etc first. Comments and criticism greatly appreciated! Thanks, Dave

2 4

[libvirt] [PATCH 0/3 RESENT] Fix virsh race and coredump
by Viktor Mihajlovski 27 Mar '13

27 Mar '13

Please consider for 1.0.4 as this prevents a potential data corruption or segfault. The race is caused by referencing a disposed connection object in a callback. In the first patch we make sure that the object reference count is reflecting the callback registration. This prevents a premature disposal. The second patch prevents the invocation of a NULL callback. The last one tries to ensure that we don't leak connection references in virsh. Viktor Mihajlovski (3): libvirt: Increase connection reference count for callbacks remote: Don't call NULL closeFreeCallback virsh: Unregister the connection close notifier upon termination src/libvirt.c | 5 +++++ src/remote/remote_driver.c | 3 ++- tools/virsh.c | 23 +++++++++++++++++------ 3 files changed, 24 insertions(+), 7 deletions(-) -- 1.7.9.5

3 9

[libvirt] How to get iteration time & downtime?
by Yuan, Ye A 27 Mar '13

27 Mar '13

Hi all, I'm a graduate student in Shanghai, and will do experiment about live migration using KVM as hypervisor. Due to my demand, I want to get each iteration time and downtime in migration. I found there is no API to implement it, and how can I obtain data I want? Thanks very much. Best wishes, Yale Yuan

3 5

[libvirt] [PATCHv2] virsh-domain: Simplify usage of --current, --live and --config flags
by Peter Krempa 27 Mar '13

27 Mar '13

This patch uses the new helper to avoid the more complex check for domain state modification flags. --- Notes: Version 2: - remove unecessary usage of "if (current)" - fix cmdSetmaxmem - convert cmdMemtune too tools/virsh-domain.c | 300 ++++++++++++++++++++------------------------------- 1 file changed, 118 insertions(+), 182 deletions(-) diff --git a/tools/virsh-domain.c b/tools/virsh-domain.c index 128e516..11db36b 100644 --- a/tools/virsh-domain.c +++ b/tools/virsh-domain.c @@ -1021,25 +1021,21 @@ cmdBlkdeviotune(vshControl *ctl, const vshCmd *cmd) int nparams = 0; int maxparams = 0; virTypedParameterPtr params = NULL; - unsigned int flags = 0, i = 0; + unsigned int flags = VIR_DOMAIN_AFFECT_CURRENT; + unsigned int i = 0; int rv = 0; bool current = vshCommandOptBool(cmd, "current"); bool config = vshCommandOptBool(cmd, "config"); bool live = vshCommandOptBool(cmd, "live"); bool ret = false; - if (current) { - if (live || config) { - vshError(ctl, "%s", _("--current must be specified exclusively")); - return false; - } - flags = VIR_DOMAIN_AFFECT_CURRENT; - } else { - if (config) - flags |= VIR_DOMAIN_AFFECT_CONFIG; - if (live) - flags |= VIR_DOMAIN_AFFECT_LIVE; - } + VSH_EXCLUSIVE_OPTIONS_VAR(current, live); + VSH_EXCLUSIVE_OPTIONS_VAR(current, config); + + if (config) + flags |= VIR_DOMAIN_AFFECT_CONFIG; + if (live) + flags |= VIR_DOMAIN_AFFECT_LIVE; if (!(dom = vshCommandOptDomain(ctl, cmd, &name))) goto cleanup; @@ -1206,23 +1202,18 @@ cmdBlkiotune(vshControl * ctl, const vshCmd * cmd) unsigned int i = 0; virTypedParameterPtr params = NULL; bool ret = false; - unsigned int flags = 0; + unsigned int flags = VIR_DOMAIN_AFFECT_CURRENT; bool current = vshCommandOptBool(cmd, "current"); bool config = vshCommandOptBool(cmd, "config"); bool live = vshCommandOptBool(cmd, "live"); - if (current) { - if (live || config) { - vshError(ctl, "%s", _("--current must be specified exclusively")); - return false; - } - flags = VIR_DOMAIN_AFFECT_CURRENT; - } else { - if (config) - flags |= VIR_DOMAIN_AFFECT_CONFIG; - if (live) - flags |= VIR_DOMAIN_AFFECT_LIVE; - } + VSH_EXCLUSIVE_OPTIONS_VAR(current, live); + VSH_EXCLUSIVE_OPTIONS_VAR(current, config); + + if (config) + flags |= VIR_DOMAIN_AFFECT_CONFIG; + if (live) + flags |= VIR_DOMAIN_AFFECT_LIVE; if (!(dom = vshCommandOptDomain(ctl, cmd, NULL))) return false; @@ -2475,7 +2466,7 @@ cmdDomIftune(vshControl *ctl, const vshCmd *cmd) virDomainPtr dom; const char *name = NULL, *device = NULL, *inboundStr = NULL, *outboundStr = NULL; - unsigned int flags = 0; + unsigned int flags = VIR_DOMAIN_AFFECT_CURRENT; int nparams = 0; int maxparams = 0; virTypedParameterPtr params = NULL; @@ -2486,18 +2477,13 @@ cmdDomIftune(vshControl *ctl, const vshCmd *cmd) virNetDevBandwidthRate inbound, outbound; int i; - if (current) { - if (live || config) { - vshError(ctl, "%s", _("--current must be specified exclusively")); - return false; - } - flags = VIR_DOMAIN_AFFECT_CURRENT; - } else { - if (config) - flags |= VIR_DOMAIN_AFFECT_CONFIG; - if (live) - flags |= VIR_DOMAIN_AFFECT_LIVE; - } + VSH_EXCLUSIVE_OPTIONS_VAR(current, live); + VSH_EXCLUSIVE_OPTIONS_VAR(current, config); + + if (config) + flags |= VIR_DOMAIN_AFFECT_CONFIG; + if (live) + flags |= VIR_DOMAIN_AFFECT_LIVE; if (!(dom = vshCommandOptDomain(ctl, cmd, &name))) return false; @@ -4027,23 +4013,18 @@ cmdSchedinfo(vshControl *ctl, const vshCmd *cmd) int nupdates = 0; int i, ret; bool ret_val = false; - unsigned int flags = 0; + unsigned int flags = VIR_DOMAIN_AFFECT_CURRENT; bool current = vshCommandOptBool(cmd, "current"); bool config = vshCommandOptBool(cmd, "config"); bool live = vshCommandOptBool(cmd, "live"); - if (current) { - if (live || config) { - vshError(ctl, "%s", _("--current must be specified exclusively")); - return false; - } - flags = VIR_DOMAIN_AFFECT_CURRENT; - } else { - if (config) - flags |= VIR_DOMAIN_AFFECT_CONFIG; - if (live) - flags |= VIR_DOMAIN_AFFECT_LIVE; - } + VSH_EXCLUSIVE_OPTIONS_VAR(current, live); + VSH_EXCLUSIVE_OPTIONS_VAR(current, config); + + if (config) + flags |= VIR_DOMAIN_AFFECT_CONFIG; + if (live) + flags |= VIR_DOMAIN_AFFECT_LIVE; if (!(dom = vshCommandOptDomain(ctl, cmd, NULL))) return false; @@ -5478,23 +5459,18 @@ cmdVcpuPin(vshControl *ctl, const vshCmd *cmd) bool live = vshCommandOptBool(cmd, "live"); bool current = vshCommandOptBool(cmd, "current"); bool query = false; /* Query mode if no cpulist */ - unsigned int flags = 0; + unsigned int flags = VIR_DOMAIN_AFFECT_CURRENT; - if (current) { - if (live || config) { - vshError(ctl, "%s", _("--current must be specified exclusively")); - return false; - } - flags = VIR_DOMAIN_AFFECT_CURRENT; - } else { - if (config) - flags |= VIR_DOMAIN_AFFECT_CONFIG; - if (live) - flags |= VIR_DOMAIN_AFFECT_LIVE; - /* neither option is specified */ - if (!live && !config) - flags = -1; - } + VSH_EXCLUSIVE_OPTIONS_VAR(current, live); + VSH_EXCLUSIVE_OPTIONS_VAR(current, config); + + if (config) + flags |= VIR_DOMAIN_AFFECT_CONFIG; + if (live) + flags |= VIR_DOMAIN_AFFECT_LIVE; + /* none of the options were specified */ + if (!current && !live && !config) + flags = -1; if (vshCommandOptStringReq(ctl, cmd, "cpulist", &cpulist) < 0) return false; @@ -5712,23 +5688,18 @@ cmdEmulatorPin(vshControl *ctl, const vshCmd *cmd) bool live = vshCommandOptBool(cmd, "live"); bool current = vshCommandOptBool(cmd, "current"); bool query = false; /* Query mode if no cpulist */ - unsigned int flags = 0; + unsigned int flags = VIR_DOMAIN_AFFECT_CURRENT; - if (current) { - if (live || config) { - vshError(ctl, "%s", _("--current must be specified exclusively")); - return false; - } - flags = VIR_DOMAIN_AFFECT_CURRENT; - } else { - if (config) - flags |= VIR_DOMAIN_AFFECT_CONFIG; - if (live) - flags |= VIR_DOMAIN_AFFECT_LIVE; - /* neither option is specified */ - if (!live && !config) - flags = -1; - } + VSH_EXCLUSIVE_OPTIONS_VAR(current, live); + VSH_EXCLUSIVE_OPTIONS_VAR(current, config); + + if (config) + flags |= VIR_DOMAIN_AFFECT_CONFIG; + if (live) + flags |= VIR_DOMAIN_AFFECT_LIVE; + /* none of the options were specified */ + if (!current && !live && !config) + flags = -1; if (!(dom = vshCommandOptDomain(ctl, cmd, NULL))) return false; @@ -5911,23 +5882,18 @@ cmdSetvcpus(vshControl *ctl, const vshCmd *cmd) bool config = vshCommandOptBool(cmd, "config"); bool live = vshCommandOptBool(cmd, "live"); bool current = vshCommandOptBool(cmd, "current"); - unsigned int flags = 0; + unsigned int flags = VIR_DOMAIN_AFFECT_CURRENT; - if (current) { - if (live || config) { - vshError(ctl, "%s", _("--current must be specified exclusively")); - return false; - } - flags = VIR_DOMAIN_AFFECT_CURRENT; - } else { - if (config) - flags |= VIR_DOMAIN_AFFECT_CONFIG; - if (live) - flags |= VIR_DOMAIN_AFFECT_LIVE; - /* neither option is specified */ - if (!live && !config && !maximum) - flags = -1; - } + VSH_EXCLUSIVE_OPTIONS_VAR(current, live); + VSH_EXCLUSIVE_OPTIONS_VAR(current, config); + + if (config) + flags |= VIR_DOMAIN_AFFECT_CONFIG; + if (live) + flags |= VIR_DOMAIN_AFFECT_LIVE; + /* none of the options were specified */ + if (!current && !live && !config && !maximum) + flags = -1; if (!(dom = vshCommandOptDomain(ctl, cmd, NULL))) return false; @@ -6608,18 +6574,13 @@ cmdDesc(vshControl *ctl, const vshCmd *cmd ATTRIBUTE_UNUSED) bool ret = false; unsigned int flags = VIR_DOMAIN_AFFECT_CURRENT; - if (current) { - if (live || config) { - vshError(ctl, "%s", _("--current must be specified exclusively")); - return false; - } - flags = VIR_DOMAIN_AFFECT_CURRENT; - } else { - if (config) - flags |= VIR_DOMAIN_AFFECT_CONFIG; - if (live) - flags |= VIR_DOMAIN_AFFECT_LIVE; - } + VSH_EXCLUSIVE_OPTIONS_VAR(current, live); + VSH_EXCLUSIVE_OPTIONS_VAR(current, config); + + if (config) + flags |= VIR_DOMAIN_AFFECT_CONFIG; + if (live) + flags |= VIR_DOMAIN_AFFECT_LIVE; if (!(dom = vshCommandOptDomain(ctl, cmd, NULL))) return false; @@ -7025,23 +6986,18 @@ cmdSetmem(vshControl *ctl, const vshCmd *cmd) bool config = vshCommandOptBool(cmd, "config"); bool live = vshCommandOptBool(cmd, "live"); bool current = vshCommandOptBool(cmd, "current"); - unsigned int flags = 0; + unsigned int flags = VIR_DOMAIN_AFFECT_CURRENT; - if (current) { - if (live || config) { - vshError(ctl, "%s", _("--current must be specified exclusively")); - return false; - } - flags = VIR_DOMAIN_AFFECT_CURRENT; - } else { - if (config) - flags |= VIR_DOMAIN_AFFECT_CONFIG; - if (live) - flags |= VIR_DOMAIN_AFFECT_LIVE; - /* neither option is specified */ - if (!live && !config) - flags = -1; - } + VSH_EXCLUSIVE_OPTIONS_VAR(current, live); + VSH_EXCLUSIVE_OPTIONS_VAR(current, config); + + if (config) + flags |= VIR_DOMAIN_AFFECT_CONFIG; + if (live) + flags |= VIR_DOMAIN_AFFECT_LIVE; + /* none of the options were specified */ + if (!current && !live && !config) + flags = -1; if (!(dom = vshCommandOptDomain(ctl, cmd, NULL))) return false; @@ -7127,22 +7083,18 @@ cmdSetmaxmem(vshControl *ctl, const vshCmd *cmd) bool config = vshCommandOptBool(cmd, "config"); bool live = vshCommandOptBool(cmd, "live"); bool current = vshCommandOptBool(cmd, "current"); - unsigned int flags = VIR_DOMAIN_MEM_MAXIMUM; + unsigned int flags = VIR_DOMAIN_AFFECT_CURRENT | VIR_DOMAIN_MEM_MAXIMUM; - if (current) { - if (live || config) { - vshError(ctl, "%s", _("--current must be specified exclusively")); - return false; - } - } else { - if (config) - flags |= VIR_DOMAIN_AFFECT_CONFIG; - if (live) - flags |= VIR_DOMAIN_AFFECT_LIVE; - /* neither option is specified */ - if (!live && !config) - flags = -1; - } + VSH_EXCLUSIVE_OPTIONS_VAR(current, live); + VSH_EXCLUSIVE_OPTIONS_VAR(current, config); + + if (config) + flags |= VIR_DOMAIN_AFFECT_CONFIG; + if (live) + flags |= VIR_DOMAIN_AFFECT_LIVE; + /* none of the options were specified */ + if (!current && !live && !config) + flags = -1; if (!(dom = vshCommandOptDomain(ctl, cmd, NULL))) return false; @@ -7264,23 +7216,18 @@ cmdMemtune(vshControl *ctl, const vshCmd *cmd) unsigned int i = 0; virTypedParameterPtr params = NULL; bool ret = false; - unsigned int flags = 0; + unsigned int flags = VIR_DOMAIN_AFFECT_CURRENT; bool current = vshCommandOptBool(cmd, "current"); bool config = vshCommandOptBool(cmd, "config"); bool live = vshCommandOptBool(cmd, "live"); - if (current) { - if (live || config) { - vshError(ctl, "%s", _("--current must be specified exclusively")); - return false; - } - flags = VIR_DOMAIN_AFFECT_CURRENT; - } else { - if (config) - flags |= VIR_DOMAIN_AFFECT_CONFIG; - if (live) - flags |= VIR_DOMAIN_AFFECT_LIVE; - } + VSH_EXCLUSIVE_OPTIONS_VAR(current, live); + VSH_EXCLUSIVE_OPTIONS_VAR(current, config); + + if (config) + flags |= VIR_DOMAIN_AFFECT_CONFIG; + if (live) + flags |= VIR_DOMAIN_AFFECT_LIVE; if (!(dom = vshCommandOptDomain(ctl, cmd, NULL))) return false; @@ -7435,24 +7382,19 @@ cmdNumatune(vshControl * ctl, const vshCmd * cmd) virTypedParameterPtr params = NULL; const char *nodeset = NULL; bool ret = false; - unsigned int flags = 0; + unsigned int flags = VIR_DOMAIN_AFFECT_CURRENT; bool current = vshCommandOptBool(cmd, "current"); bool config = vshCommandOptBool(cmd, "config"); bool live = vshCommandOptBool(cmd, "live"); const char *mode = NULL; - if (current) { - if (live || config) { - vshError(ctl, "%s", _("--current must be specified exclusively")); - return false; - } - flags = VIR_DOMAIN_AFFECT_CURRENT; - } else { - if (config) - flags |= VIR_DOMAIN_AFFECT_CONFIG; - if (live) - flags |= VIR_DOMAIN_AFFECT_LIVE; - } + VSH_EXCLUSIVE_OPTIONS_VAR(current, live); + VSH_EXCLUSIVE_OPTIONS_VAR(current, config); + + if (config) + flags |= VIR_DOMAIN_AFFECT_CONFIG; + if (live) + flags |= VIR_DOMAIN_AFFECT_LIVE; if (!(dom = vshCommandOptDomain(ctl, cmd, NULL))) return false; @@ -9961,7 +9903,7 @@ cmdChangeMedia(vshControl *ctl, const vshCmd *cmd) const char *doc = NULL; xmlNodePtr disk_node = NULL; const char *disk_xml = NULL; - int flags = 0; + unsigned int flags = VIR_DOMAIN_AFFECT_CURRENT; bool config, live, current, force = false; bool eject, insert, update = false; bool ret = false; @@ -9997,19 +9939,13 @@ cmdChangeMedia(vshControl *ctl, const vshCmd *cmd) action = "update"; } - if (current) { - if (live || config) { - vshError(ctl, "%s", _("--current must be specified exclusively")); - return false; - } - flags = VIR_DOMAIN_AFFECT_CURRENT; - } else { - if (config) - flags |= VIR_DOMAIN_AFFECT_CONFIG; - if (live) - flags |= VIR_DOMAIN_AFFECT_LIVE; - } + VSH_EXCLUSIVE_OPTIONS_VAR(current, live); + VSH_EXCLUSIVE_OPTIONS_VAR(current, config); + if (config) + flags |= VIR_DOMAIN_AFFECT_CONFIG; + if (live) + flags |= VIR_DOMAIN_AFFECT_LIVE; if (force) flags |= VIR_DOMAIN_DEVICE_MODIFY_FORCE; -- 1.8.1.5

2 1

[libvirt] [PATCH] log: Separate thread ID from timestemp in ring buffer
by Jiri Denemark 27 Mar '13

27 Mar '13

When we write a log message into a log, we separate thread ID from timestamp using ": ". However, when storing the message into the ring buffer, we omitted the separator, e.g.: 2013-02-27 11:49:11.852+00003745: ... --- src/util/virlog.c | 1 + 1 file changed, 1 insertion(+) diff --git a/src/util/virlog.c b/src/util/virlog.c index 957d993..721c9bd 100644 --- a/src/util/virlog.c +++ b/src/util/virlog.c @@ -850,6 +850,7 @@ virLogVMessage(virLogSource source, */ virLogLock(); virLogStr(timestamp); + virLogStr(": "); virLogStr(msg); virLogUnlock(); if (emit == 0) -- 1.8.1.5

2 2

[libvirt] [PATCH] rpc: Fix client crash when server drops connection
by Jiri Denemark 27 Mar '13

27 Mar '13

Despite of the comment stating virNetClientIncomingEvent handler should never be called with either client->haveTheBuck or client->wantClose set, there is a sequence of events that may lead to both booleans being true when virNetClientIncomingEvent is called. However, when that happens, we must not immediately close the socket as there are other threads waiting for the buck and they would cause SIGSEGV once they are woken up after the socket was closed. Another thing is we should clear all remaining calls in the queue after closing the socket. The situation that can lead to the crash involves three threads, one of them running event loop and the other two calling libvirt APIs. The event loop threads detects an event on client->sock and calls virNetClientIncomingEvent handler. But before the handler gets a chance to lock client, the other two threads (T1 and T2) start calling some APIs. T1 gets the buck and detects EOF on client->sock while processing its RPC call. Since T2 is waiting for its own call, T1 passes the buck onto it and unlocks client. But before T2 gets the signal, the event loop thread wakes up, does its job and closes client->sock. The crash happens when T2 actually wakes up and tries to do its job using a closed client->sock. --- src/rpc/virnetclient.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/src/rpc/virnetclient.c b/src/rpc/virnetclient.c index 1379078..010c5c3 100644 --- a/src/rpc/virnetclient.c +++ b/src/rpc/virnetclient.c @@ -1825,7 +1825,6 @@ void virNetClientIncomingEvent(virNetSocketPtr sock, if (!client->sock) goto done; - /* This should be impossible, but it doesn't hurt to check */ if (client->haveTheBuck || client->wantClose) goto done; @@ -1858,8 +1857,12 @@ void virNetClientIncomingEvent(virNetSocketPtr sock, virNetClientIOUpdateCallback(client, true); done: - if (client->wantClose) + if (client->wantClose && !client->haveTheBuck) { virNetClientCloseLocked(client); + virNetClientCallRemovePredicate(&client->waitDispatch, + virNetClientIOEventLoopRemoveAll, + NULL); + } virObjectUnlock(client); } -- 1.8.1.5

2 2

[libvirt] Unable to start container on Fedora 17 with kernel 3.8.0
by Purcareata Bogdan-B43198 27 Mar '13

27 Mar '13

Hello, I've had some trouble starting a Linux Container with libvirt. Here's my setup: 1. I've downloaded libvirt-1.0.3.tar.gz from [1] and issued: - ./configure --prefix=/usr - make - make install - ldconfig 2. I've started the libvirtd service: - sudo service libvirtd start Starting libvirtd (via systemctl): Warning: Unit file of created job changed on disk, 'systemctl --system daemon-reload' recommended. [ OK ] 3. I've defined the lxc domain: <domain type='lxc'> <name>foo</name> <uuid>2d1fa65a-0dbf-46e3-3a5c-ebc53e3d0c25</uuid> <memory unit='KiB'>500000</memory> <currentMemory unit='KiB'>500000</currentMemory> <vcpu placement='static'>1</vcpu> <os> <type arch='x86_64'>exe</type> <init>/bin/init</init> </os> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>destroy</on_crash> <devices> <emulator>/usr/libexec/libvirt_lxc</emulator> <filesystem type='mount' accessmode='passthrough'> <source dir='/usr/var/lib/lxc/foo/rootfs'/> <target dir='/'/> </filesystem> <console type='pty'> <target type='serial' port='0'/> </console> <console type='pty'> <target type='serial' port='1'/> </console> <console type='pty'> <target type='serial' port='2'/> </console> <console type='pty'> <target type='serial' port='3'/> </console> </devices> </domain> When issuing virsh -c lxc:/// start foo I get the following error: error: Failed to start domain foo error: internal error guest failed to start: PATH=/bin:/sbin TERM=linux container=lxc-libvirt container_uuid=2d1fa65a-0dbf-46e3-3a5c-ebc53e3d0c25 LIBVIRT_LXC_UUID=2d1fa65a-0dbf-46e3-3a5c-ebc53e3d0c25 LIBVIRT_LXC_NAME=foo /bin/init 2013-03-26 17:09:34.186+0000: 1: info : libvirt version: 1.0.3 2013-03-26 17:09:34.186+0000: 1: error : lxcContainerMountBasicFS:563 : Failed to mount /selinux on /selinux type selinuxfs flags=e opts=(null): No such device 2013-03-26 17:09:34.186+0000: 8087: info : libvirt version: 1.0.3 2013-03-26 17:09:34.186+0000: 8087: error : virLXCControllerRun:1468 : error receiving signal from container: Input/output error Same message is present in /var/log/libvirt/lxc/foo.log. No errors shown in /var/log/messages. Machine: Linux everest 3.8.0 #1 SMP Mon Mar 25 19:29:56 EET 2013 x86_64 x86_64 x86_64 GNU/Linux Can you please provide me some more info on the issue? Thank you very much, Bogdan P. [1] http://libvirt.org/sources/libvirt-1.0.3.tar.gz

2 2

[libvirt] [PATCH] conf: fix a failure when detaching a usb device
by Guannan Ren 27 Mar '13

27 Mar '13

#virsh detach-device $guest usb.xml error: Failed to detach device from usb2.xml error: operation failed: host usb device vendor=0x0951 \ product=0x1625 not found This regresstion is due to a typo in matching function. The first argument is always the usb device that we are checking for. If the usb xml file provided by user contains bus and device info, we try to search it by them, otherwise, we use vendor and product info. The bug occurred only when detaching a usb device with no bus and device info provided in the usb xml file. --- src/conf/domain_conf.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c index 4cae0d3..2b2f35c 100644 --- a/src/conf/domain_conf.c +++ b/src/conf/domain_conf.c @@ -8541,7 +8541,7 @@ static int virDomainHostdevMatchSubsysUSB(virDomainHostdevDefPtr a, virDomainHostdevDefPtr b) { - if (b->source.subsys.u.usb.bus && b->source.subsys.u.usb.device) { + if (a->source.subsys.u.usb.bus && a->source.subsys.u.usb.device) { /* specified by bus location on host */ if (a->source.subsys.u.usb.bus == b->source.subsys.u.usb.bus && a->source.subsys.u.usb.device == b->source.subsys.u.usb.device) -- 1.7.11.2

2 2

[libvirt] [PATCH] qemu: Set migration FD blocking
by Michal Privoznik 27 Mar '13

27 Mar '13

Since we switched from direct host migration scheme to the one, where we connect to the destination and then just pass a FD to a qemu, we have uncovered a qemu bug. Qemu expects migration FD to block. However, we are passing a nonblocking one which results in cryptic error messages like: qemu: warning: error while loading state section id 2 load of migration failed The bug is already known to Qemu folks, but we should workaround already released Qemus. Patch has been originally proposed by Stefan Hajnoczi <stefanha(a)gmail.com> --- src/qemu/qemu_migration.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/src/qemu/qemu_migration.c b/src/qemu/qemu_migration.c index 537b834..15f3cef 100644 --- a/src/qemu/qemu_migration.c +++ b/src/qemu/qemu_migration.c @@ -2657,6 +2657,13 @@ qemuMigrationConnect(virQEMUDriverPtr driver, spec->dest.fd.qemu == -1) goto cleanup; + /* Migration expects a blocking FD */ + if (virSetBlocking(spec->dest.fd.qemu, true) < 0) { + virReportSystemError(errno, _("Unable to set FD %d blocking"), + spec->dest.fd.qemu); + goto cleanup; + } + ret = 0; cleanup: -- 1.8.1.5

4 6

[libvirt] [PATCH] qemu: Don't set type too earla during virtio disk hotplug
by Guido Günther 27 Mar '13

27 Mar '13

f946462e14ac036357b7c11ce5c23f94a3ee4e49 changed behaviour by settings VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI upfront. If we do so before invoking qemuDomainPCIAddressEnsureAddr we merely try to set the PCI slot via qemuDomainPCIAddressReserveSlot instead reserving a new address via qemuDomainPCIAddressSetNextAddr which fails with $ ~/run-tck-test domain/200-disk-hotplug.t ./scripts/domain/200-disk-hotplug.t .. # Creating a new transient domain ./scripts/domain/200-disk-hotplug.t .. 1/5 # Attaching the new disk /var/lib/jenkins/jobs/libvirt-tck-build/workspace/scratchdir/200-disk-hotplug/extra.img # Failed test 'disk has been attached' # at ./scripts/domain/200-disk-hotplug.t line 67. # died: Sys::Virt::Error (libvirt error code: 1, message: internal error unable to reserve PCI address 0:0:0.0 # ) --- This unbreaks libvirt-tck on debian wheezy. Cheers, -- Guido src/qemu/qemu_hotplug.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c index 044f8cd..576738b 100644 --- a/src/qemu/qemu_hotplug.c +++ b/src/qemu/qemu_hotplug.c @@ -226,7 +226,6 @@ int qemuDomainAttachVirtioDiskDevice(virConnectPtr conn, disk->info.type = VIR_DOMAIN_DEVICE_ADDRESS_TYPE_CCW; else if (virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_VIRTIO_S390)) disk->info.type = VIR_DOMAIN_DEVICE_ADDRESS_TYPE_VIRTIO_S390; - else disk->info.type = VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI; } for (i = 0 ; i < vm->def->ndisks ; i++) { @@ -253,7 +252,8 @@ int qemuDomainAttachVirtioDiskDevice(virConnectPtr conn, if (qemuDomainCCWAddressAssign(&disk->info, priv->ccwaddrs, !disk->info.addr.ccw.assigned) < 0) goto error; - } else if (disk->info.type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI) { + } else if (!disk->info.type || + disk->info.type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI) { if (qemuDomainPCIAddressEnsureAddr(priv->pciaddrs, &disk->info) < 0) goto error; } @@ -291,14 +291,17 @@ int qemuDomainAttachVirtioDiskDevice(virConnectPtr conn, } } } - } else if (disk->info.type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI){ + } else if (!disk->info.type || + disk->info.type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI) { virDevicePCIAddress guestAddr = disk->info.addr.pci; ret = qemuMonitorAddPCIDisk(priv->mon, disk->src, type, &guestAddr); - if (ret == 0) + if (ret == 0) { + disk->info.type = VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI; memcpy(&disk->info.addr.pci, &guestAddr, sizeof(guestAddr)); + } } qemuDomainObjExitMonitor(driver, vm); -- 1.7.10.4

2 4

[libvirt] [PATCH] Correct DESCRIPTION for virsh help blockcopy
by Yanbing Du 27 Mar '13

27 Mar '13

Signed-off-by: Yanbing Du <ydu(a)redhat.com> --- tools/virsh-domain.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/tools/virsh-domain.c b/tools/virsh-domain.c index 592a6e8..fc5cb1e 100644 --- a/tools/virsh-domain.c +++ b/tools/virsh-domain.c @@ -1603,7 +1603,7 @@ static const vshCmdInfo info_block_copy[] = { .data = N_("Start a block copy operation.") }, {.name = "desc", - .data = N_("Populate a disk from its backing image.") + .data = N_("Copy a disk backing image chain to dest.") }, {.name = NULL} }; -- 1.7.1

2 1

[libvirt] [PATCH] virsh: error out on non-numeric timeout values
by Ján Tomko 27 Mar '13

27 Mar '13

Some block commands and migrate ignored incorrect values. Bug: https://bugzilla.redhat.com/show_bug.cgi?id=927495 --- tools/virsh-domain.c | 48 ++++++++++++++++++++++++------------------------ 1 file changed, 24 insertions(+), 24 deletions(-) diff --git a/tools/virsh-domain.c b/tools/virsh-domain.c index 592a6e8..12bdd58 100644 --- a/tools/virsh-domain.c +++ b/tools/virsh-domain.c @@ -1495,14 +1495,14 @@ cmdBlockCommit(vshControl *ctl, const vshCmd *cmd) const char *path = NULL; bool quit = false; int abort_flags = 0; + int rv; if (blocking) { - if (vshCommandOptInt(cmd, "timeout", &timeout) > 0) { - if (timeout < 1) { - vshError(ctl, "%s", _("invalid timeout")); - return false; - } - + if ((rv = vshCommandOptInt(cmd, "timeout", &timeout)) < 0 || + (rv > 0 && timeout < 1)) { + vshError(ctl, "%s", _("invalid timeout")); + return false; + } else if (rv > 0) { /* Ensure that we can multiply by 1000 without overflowing. */ if (timeout > INT_MAX / 1000) { vshError(ctl, "%s", _("timeout is too big")); @@ -1685,18 +1685,18 @@ cmdBlockCopy(vshControl *ctl, const vshCmd *cmd) const char *path = NULL; bool quit = false; int abort_flags = 0; + int rv; if (blocking) { if (pivot && finish) { vshError(ctl, "%s", _("cannot mix --pivot and --finish")); return false; } - if (vshCommandOptInt(cmd, "timeout", &timeout) > 0) { - if (timeout < 1) { - vshError(ctl, "%s", _("invalid timeout")); - return false; - } - + if ((rv = vshCommandOptInt(cmd, "timeout", &timeout)) < 0 || + (rv > 0 && timeout < 1)) { + vshError(ctl, "%s", _("invalid timeout")); + return false; + } else if (rv > 0) { /* Ensure that we can multiply by 1000 without overflowing. */ if (timeout > INT_MAX / 1000) { vshError(ctl, "%s", _("timeout is too big")); @@ -1962,14 +1962,14 @@ cmdBlockPull(vshControl *ctl, const vshCmd *cmd) const char *path = NULL; bool quit = false; int abort_flags = 0; + int rv; if (blocking) { - if (vshCommandOptInt(cmd, "timeout", &timeout) > 0) { - if (timeout < 1) { - vshError(ctl, "%s", _("invalid timeout")); - return false; - } - + if ((rv = vshCommandOptInt(cmd, "timeout", &timeout)) < 0 || + (rv > 0 && timeout < 1)) { + vshError(ctl, "%s", _("invalid timeout")); + return false; + } else if (rv > 0) { /* Ensure that we can multiply by 1000 without overflowing. */ if (timeout > INT_MAX / 1000) { vshError(ctl, "%s", _("timeout is too big")); @@ -8456,6 +8456,7 @@ cmdMigrate(vshControl *ctl, const vshCmd *cmd) int timeout = 0; bool live_flag = false; vshCtrlData data; + int rv; if (!(dom = vshCommandOptDomain(ctl, cmd, NULL))) return false; @@ -8465,18 +8466,17 @@ cmdMigrate(vshControl *ctl, const vshCmd *cmd) if (vshCommandOptBool(cmd, "live")) live_flag = true; - if (vshCommandOptInt(cmd, "timeout", &timeout) > 0) { + if ((rv = vshCommandOptInt(cmd, "timeout", &timeout)) < 0 || + (rv > 0 && timeout < 1)) { + vshError(ctl, "%s", _("migrate: Invalid timeout")); + goto cleanup; + } else if (rv > 0) { if (! live_flag) { vshError(ctl, "%s", _("migrate: Unexpected timeout for offline migration")); goto cleanup; } - if (timeout < 1) { - vshError(ctl, "%s", _("migrate: Invalid timeout")); - goto cleanup; - } - /* Ensure that we can multiply by 1000 without overflowing. */ if (timeout > INT_MAX / 1000) { vshError(ctl, "%s", _("migrate: Timeout is too big")); -- 1.8.1.5

2 2

[libvirt] [PATCH] Fix virConnectOpen.*() name requirements
by Martin Kletzander 26 Mar '13

26 Mar '13

virConnectOpenAuth didn't require 'name' to be specified (VIR_DEBUG used NULLSTR() for the output) and by default, if name == NULL, the default connection uri is used. This was not indicated in the documentation and wasn't checked for in other API's VIR_DEBUG outputs. --- Thanks to Guannan's patch, this makes the following possible in python: conn = libvirt.open() which I personally find pretty nice. --- src/libvirt.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/src/libvirt.c b/src/libvirt.c index 1624776..4b9ea75 100644 --- a/src/libvirt.c +++ b/src/libvirt.c @@ -1334,7 +1334,7 @@ failed: /** * virConnectOpen: - * @name: URI of the hypervisor + * @name: (optional) URI of the hypervisor * * This function should be called first to get a connection to the * Hypervisor and xen store @@ -1362,7 +1362,7 @@ virConnectOpen(const char *name) if (virInitialize() < 0) goto error; - VIR_DEBUG("name=%s", name); + VIR_DEBUG("name=%s", NULLSTR(name)); virResetLastError(); ret = do_open(name, NULL, 0); if (!ret) @@ -1376,7 +1376,7 @@ error: /** * virConnectOpenReadOnly: - * @name: URI of the hypervisor + * @name: (optional) URI of the hypervisor * * This function should be called first to get a restricted connection to the * library functionalities. The set of APIs usable are then restricted @@ -1397,7 +1397,7 @@ virConnectOpenReadOnly(const char *name) if (virInitialize() < 0) goto error; - VIR_DEBUG("name=%s", name); + VIR_DEBUG("name=%s", NULLSTR(name)); virResetLastError(); ret = do_open(name, NULL, VIR_CONNECT_RO); if (!ret) @@ -1411,7 +1411,7 @@ error: /** * virConnectOpenAuth: - * @name: URI of the hypervisor + * @name: (optional) URI of the hypervisor * @auth: Authenticate callback parameters * @flags: bitwise-OR of virConnectFlags * -- 1.8.1.5

2 4

[libvirt] [PATCH] virsh: Let the compiler check usage of all fields in vshCmdOptType enum
by Peter Krempa 26 Mar '13

26 Mar '13

Get rid of the "default" labels to do so. --- tools/virsh.c | 4 ---- 1 file changed, 4 deletions(-) diff --git a/tools/virsh.c b/tools/virsh.c index b574d7e..0a9ac6f 100644 --- a/tools/virsh.c +++ b/tools/virsh.c @@ -1172,8 +1172,6 @@ vshCmddefHelp(vshControl *ctl, const char *cmdname) case VSH_OT_ALIAS: /* aliases are intentionally undocumented */ continue; - default: - assert(0); } fputc(' ', stdout); fprintf(stdout, fmt, opt->name); @@ -1215,8 +1213,6 @@ vshCmddefHelp(vshControl *ctl, const char *cmdname) break; case VSH_OT_ALIAS: continue; - default: - assert(0); } fprintf(stdout, " %-15s %s\n", buf, _(opt->help)); -- 1.8.1.5

2 3

[libvirt] [PATCH] python: set default value to optional arguments
by Guannan Ren 26 Mar '13

26 Mar '13

When prefixing with string (optional) or optional in the description of arguments to libvirt C APIs, in python, these arguments will be set as optional arugments, for example: * virDomainSaveFlags: * @domain: a domain object * @to: path for the output file * @dxml: (optional) XML config for adjusting guest xml used on restore * @flags: bitwise-OR of virDomainSaveRestoreFlags the corresponding python APIs is restoreFlags(self, frm, dxml=None, flags=0) The following python APIs are changed to: blockCommit(self, disk, base, top, bandwidth=0, flags=0) blockPull(self, disk, bandwidth=0, flags=0) blockRebase(self, disk, base, bandwidth=0, flags=0) migrate(self, dconn, flags=0, dname=None, uri=None, bandwidth=0) migrate2(self, dconn, dxml=None, flags=0, dname=None, uri=None, bandwidth=0) migrateToURI(self, duri, flags=0, dname=None, bandwidth=0) migrateToURI2(self, dconnuri=None, miguri=None, dxml=None, flags=0, \ dname=None, bandwidth=0) saveFlags(self, to, dxml=None, flags=0) migrate(self, domain, flags=0, dname=None, uri=None, bandwidth=0) migrate2(self, domain, dxml=None, flags=0, dname=None, uri=None, bandwidth=0) restoreFlags(self, frm, dxml=None, flags=0) --- python/generator.py | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/python/generator.py b/python/generator.py index 0237374..7586ffc 100755 --- a/python/generator.py +++ b/python/generator.py @@ -1005,6 +1005,8 @@ functions_int_default_test = "%s == -1" def is_integral_type (name): return not re.search ("^(unsigned)? ?(int|long)$", name) is None +def is_optional_arg(info): + return not re.search("^$?\optional$?", info) is None # Functions returning lists which need special rules to check for errors # and raise exceptions. functions_list_exception_test = { @@ -1488,9 +1490,12 @@ def buildWrappers(module): for arg in args: if n != index: classes.write(", %s" % arg[0]) + if arg[0] == "flags" or is_optional_arg(arg[2]): + if is_integral_type(arg[1]): + classes.write("=0") + else: + classes.write("=None") n = n + 1 - if arg[0] == "flags": - classes.write("=0") classes.write("):\n") writeDoc(module, name, args, ' ', classes) n = 0 -- 1.7.11.2

2 3

[libvirt] [PATCH] Remove the redundant parentheses in migrate help
by Yanbing Du 26 Mar '13

26 Mar '13

Signed-off-by: Yanbing Du <ydu(a)redhat.com> --- tools/virsh-domain.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/tools/virsh-domain.c b/tools/virsh-domain.c index 128e516..592a6e8 100644 --- a/tools/virsh-domain.c +++ b/tools/virsh-domain.c @@ -8286,7 +8286,7 @@ static const vshCmdOptDef opts_migrate[] = { }, {.name = "change-protection", .type = VSH_OT_BOOL, - .help = N_("prevent any configuration changes to domain until migration ends)") + .help = N_("prevent any configuration changes to domain until migration ends") }, {.name = "unsafe", .type = VSH_OT_BOOL, -- 1.7.1

3 2

[libvirt] libvirt<->QEMU interfaces for CPU models
by Eduardo Habkost 26 Mar '13

26 Mar '13

Hi, After a long time trying to figure out the proper modelling inside QEMU, I believe the plans are now clearer in QEMU, so it's time to coordinate more closely with libvirt to try to make use of the new stuff. I tried to enumerate the libvirt requirements and current problems, and how we should be able to solve those problems using the X86CPU subclasses and properties, on the following wiki page: http://wiki.qemu.org/Features/CPUModels#Interfaces.2Frequirements_from_libv… I am pasting the section contents below, to facilitate discussion: = Ensuring predictable set of guest features = Requirement: libvirt needs to ensure all features required on the command-line are present and exposed to the guest. Current problem: libvirt doesn't use the "enforce" flag so it can't guarantee that a given feature will be actually exposed to the guest. Solution: use the "enforce" flag on the "-cpu" option. Limitation: no proper machine-friendly interface to report which features are missing. Workaround: See "querying for host capabilities" below. == Future plans == Machine-friendly reporting of missing host features/capabilities. = Listing CPU models = Requirement: libvirt needs to know which CPU models are available to be used with the "-cpu" option. Current problem: libvirt relies on help output parsing for that. Solution: use QMP qom-list-types command. Dependency: X86CPU subclasses. Limitation: needs a live QEMU process for the query. Solution: use QMP query-cpu-definitions command. Limitation: needs a live QEMU process for the query. == Future plans == It would be interesting to get rid of the requirement for a live QEMU process (with a complete machine being created) to be already running. = Getting information about CPU models = Requirement: libvirt uses the predefined CPU models from QEMU, but it needs to be able to query for CPU model details, to find out how it can create a VM that matches what was requested by the user. Current problem: libvirt has a copy of the CPU model definitions on its cpu_map.xml file, and the copy can be out of sync in case CPU models in QEMU change. libvirt also assumes that the set of features on each model is always the same on all machine-types, which is not true. Challenge: the resulting CPU features depend on lots of factors, including the machine-type. Workaround: start a paused VM and query for the CPU device information after the CPU was created. Solution: start a paused VM with no devices, but with the right machine-type and right CPU model. Use QMP QOM commands to query for CPU flags (especially the properties starting with the "f-" prefix). Dependency: X86CPU feature properties ("f-*" properties). Limitation: requires a live QEMU process with the right machine-type/ CPU-model to be started, to make the query. Requirement: libvirt needs to know if a specific CPU model can be used in the current host. See "Ensuring predictable set of guest features" above See "Querying host capabilities" below = Querying host capabilities = Requirement: libvirt needs to know which feature can really be enabled, before it tries to start a VM, and before it tries to start a live-migration process. The set of available capabilities depend on: • Host CPU (hardware) capabilities; • Kernel capabilities (reported by GET_SUPPORTED_CPUID); • QEMU capabilities; • Specific configuration options (e.g. in-kernel IRQ chip is required for some features). Current problem: libvirt uses the CPUID intruction directly and assumes that the presence of a feature in the host CPU means it can be enabled and exposed to the guest. This breaks when virtualization of a feature requires: • Additional hardware support (e.g. INVPCID); • Additional host kernel code (this applies to _all_ CPU features, that need to be reported as supported by GET_SUPPORTED_CPUID); • Additional QEMU-side code; • Specific configuration options (e.g. in-kernel IRQ chip). Challenge: QEMU doesn't have a generic capability-querying interface, and host capability querying depends on KVM to be initialized. Workaround: start a paused VM using the "host" CPU model, that has every single CPU feature supported by the host enabled by default, and query for the information about the CPU though QMP, using the QOM commands. Current solution: start a paused VM with no devices but with "host" CPU model and use QMP QOM commands to query for the enabled CPU features. Dependency: X86CPU feature properties == Future plans == It would be interesting to have a more generic capability-querying interface that doesn't require starting a whole machine with a live QEMU process. See also: -query-capabilities RFC series from Anthony Message-Id: <1332169763-30665-9-git-send-email-aliguori(a)us.ibm.com> -- Eduardo

4 11

[libvirt] [PATCH] Revert "qemu: detect multi-head qxl via more than version check"
by Eric Blake 26 Mar '13

26 Mar '13

This reverts commit 5ac846e42e5b7e0475f6aa9cc1e0b0c8dac84d44. After further discussions with Alon Levy, I learned the following: The use of '-vga qxl' vs. '-device qxl-vga' is completely orthogonal to whether ram_size can be exposed. Downstream distros are interested in backporting support for multi-head qxl, but this can be done in one of two ways: 1. Support one head per PCI device. If you do this, then it makes sense to have full control over the PCI address of each device. For full control, you need '-device qxl-vga' instead of '-vga qxl'. 2. Support multiple heads through a single PCI device. If you do this, then you need to allocate more RAM to that PCI device (enough ram to cover the multiple screens). Here, the device is hard-coded to 0:0:2.0, both in qemu and libvirt code. Apparently, backporting ram_size changes to allow multiple heads in a single device is much easier than backporting multiple device support. Furthermore, the presence or absence of qxl-vga.surfaces is no different than the presence or absence of qxl-vga.ram_size; both properties can be applied regardless of whether you have one PCI device (-vga qxl) or multiple (-device qxl-vga), so this property is NOT a good witness of whether '-device qxl-vga' support has been backported. Downstream RHEL will NOT be using this patch; and worse, leaving this patch in risks doing the wrong thing if compiling upstream libvirt on RHEL, so the best course of action is to revert it. That means that libvirt will go back to only using '-device qxl-vga' for qemu >= 1.2, but this is just fine because we know of no distros that plan on backporting multiple PCI address support to any older version of qemu. Meanwhile, downstream can still use ram_size to pack multiple heads through a single PCI device. --- src/qemu/qemu_capabilities.c | 7 ------- tests/qemuhelpdata/qemu-1.2.0-device | 16 ---------------- tests/qemuhelpdata/qemu-kvm-0.12.1.2-rhel62-beta-device | 10 ---------- tests/qemuhelpdata/qemu-kvm-1.2.0-device | 16 ---------------- 4 files changed, 49 deletions(-) diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c index 519d2c5..9a1b781 100644 --- a/src/qemu/qemu_capabilities.c +++ b/src/qemu/qemu_capabilities.c @@ -1387,10 +1387,6 @@ static struct virQEMUCapsStringFlags virQEMUCapsObjectPropsUsbHost[] = { { "bootindex", QEMU_CAPS_USB_HOST_BOOTINDEX }, }; -static struct virQEMUCapsStringFlags virQEMUCapsObjectPropsQxlVga[] = { - { "surfaces", QEMU_CAPS_DEVICE_VIDEO_PRIMARY }, -}; - struct virQEMUCapsObjectTypeProps { const char *type; struct virQEMUCapsStringFlags *props; @@ -1424,8 +1420,6 @@ static struct virQEMUCapsObjectTypeProps virQEMUCapsObjectProps[] = { ARRAY_CARDINALITY(virQEMUCapsObjectPropsUsbRedir) }, { "usb-host", virQEMUCapsObjectPropsUsbHost, ARRAY_CARDINALITY(virQEMUCapsObjectPropsUsbHost) }, - { "qxl-vga", virQEMUCapsObjectPropsQxlVga, - ARRAY_CARDINALITY(virQEMUCapsObjectPropsQxlVga) }, }; @@ -1623,7 +1617,6 @@ virQEMUCapsExtractDeviceStr(const char *qemu, "-device", "usb-redir,?", "-device", "ide-drive,?", "-device", "usb-host,?", - "-device", "qxl-vga,?", NULL); /* qemu -help goes to stdout, but qemu -device ? goes to stderr. */ virCommandSetErrorBuffer(cmd, &output); diff --git a/tests/qemuhelpdata/qemu-1.2.0-device b/tests/qemuhelpdata/qemu-1.2.0-device index 027d99a..5613e00 100644 --- a/tests/qemuhelpdata/qemu-1.2.0-device +++ b/tests/qemuhelpdata/qemu-1.2.0-device @@ -208,19 +208,3 @@ usb-host.bootindex=int32 usb-host.pipeline=on/off usb-host.port=string usb-host.full-path=on/off -qxl-vga.ram_size=uint32 -qxl-vga.vram_size=uint32 -qxl-vga.revision=uint32 -qxl-vga.debug=uint32 -qxl-vga.guestdebug=uint32 -qxl-vga.cmdlog=uint32 -qxl-vga.ram_size_mb=uint32 -qxl-vga.vram_size_mb=uint32 -qxl-vga.vram64_size_mb=uint32 -qxl-vga.vgamem_mb=uint32 -qxl-vga.surfaces=int32 -qxl-vga.addr=pci-devfn -qxl-vga.romfile=string -qxl-vga.rombar=uint32 -qxl-vga.multifunction=on/off -qxl-vga.command_serr_enable=on/off diff --git a/tests/qemuhelpdata/qemu-kvm-0.12.1.2-rhel62-beta-device b/tests/qemuhelpdata/qemu-kvm-0.12.1.2-rhel62-beta-device index 5eab539..ee0fd78 100644 --- a/tests/qemuhelpdata/qemu-kvm-0.12.1.2-rhel62-beta-device +++ b/tests/qemuhelpdata/qemu-kvm-0.12.1.2-rhel62-beta-device @@ -118,13 +118,3 @@ virtio-net-pci.addr=pci-devfn virtio-net-pci.romfile=string virtio-net-pci.rombar=uint32 virtio-net-pci.multifunction=on/off -qxl-vga.ram_size=uint32 -qxl-vga.vram_size=uint32 -qxl-vga.revision=uint32 -qxl-vga.debug=uint32 -qxl-vga.guestdebug=uint32 -qxl-vga.cmdlog=uint32 -qxl-vga.addr=pci-devfn -qxl-vga.romfile=string -qxl-vga.rombar=uint32 -qxl-vga.multifunction=on/off diff --git a/tests/qemuhelpdata/qemu-kvm-1.2.0-device b/tests/qemuhelpdata/qemu-kvm-1.2.0-device index ebc27f0..879a049 100644 --- a/tests/qemuhelpdata/qemu-kvm-1.2.0-device +++ b/tests/qemuhelpdata/qemu-kvm-1.2.0-device @@ -220,19 +220,3 @@ usb-host.bootindex=int32 usb-host.pipeline=on/off usb-host.port=string usb-host.full-path=on/off -qxl-vga.ram_size=uint32 -qxl-vga.vram_size=uint32 -qxl-vga.revision=uint32 -qxl-vga.debug=uint32 -qxl-vga.guestdebug=uint32 -qxl-vga.cmdlog=uint32 -qxl-vga.ram_size_mb=uint32 -qxl-vga.vram_size_mb=uint32 -qxl-vga.vram64_size_mb=uint32 -qxl-vga.vgamem_mb=uint32 -qxl-vga.surfaces=int32 -qxl-vga.addr=pci-devfn -qxl-vga.romfile=string -qxl-vga.rombar=uint32 -qxl-vga.multifunction=on/off -qxl-vga.command_serr_enable=on/off -- 1.8.1.4

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[libvirt] [PATCH] libvirt-guests: newline between output sentences
by Eric Blake 25 Mar '13

25 Mar '13

Right now, libvirt-guests gives awkward output. It's possible to force faster failure by setting /etc/sysconfig/libvirt-guests to use: ON_SHUTDOWN=shutdown PARALLEL_SHUTDOWN=0 SHUTDOWN_TIMEOUT=1 ON_BOOT=ignore at which point, we see: $ service libvirt-guests restart Running guests on default URI: a, b, d, c Shutting down guests on default URI... Starting shutdown on guest: a Shutdown of guest a failed to complete in time.Starting shutdown on guest: b Shutdown of guest b failed to complete in time.Starting shutdown on guest: d Shutdown of guest d failed to complete in time.Starting shutdown on guest: c Shutdown of guest c failed to complete in time.libvirt-guests is configured not to start any guests on boot * tools/libvirt-guests.sh.in (shutdown_guest): Add missing newline. Reported off-list by Xuesong Zhang. --- tools/libvirt-guests.sh.in | 1 + 1 file changed, 1 insertion(+) diff --git a/tools/libvirt-guests.sh.in b/tools/libvirt-guests.sh.in index 1c9c46b..4f2e203 100644 --- a/tools/libvirt-guests.sh.in +++ b/tools/libvirt-guests.sh.in @@ -269,6 +269,7 @@ shutdown_guest() else eval_gettext "Shutdown of guest \$name complete." fi + echo fi } -- 1.8.1.4

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[libvirt] [PATCH] virsh: Fix docs for "virsh setmaxmem"
by Peter Krempa 25 Mar '13

25 Mar '13

The docs assumed the command works always for QEMU and other hypervisors. Unfortunately until qemu will add memory hotplug this can't be done. Fix the docs to mention this limitation. --- tools/virsh.pod | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/tools/virsh.pod b/tools/virsh.pod index b5e632e..07e7c24 100644 --- a/tools/virsh.pod +++ b/tools/virsh.pod @@ -1469,23 +1469,24 @@ paravirtualized or running the PV balloon driver. =item B<setmaxmem> I<domain> B<size> [[I<--config>] [I<--live>] | [I<--current>]] Change the maximum memory allocation limit for a guest domain. If I<--live> is specified, affect a running guest. If I<--config> is specified, affect the next boot of a persistent guest. If I<--current> is specified, affect the current guest state. Both I<--live> and I<--config> flags may be given, but I<--current> is exclusive. If no flag is specified, behavior is different depending on hypervisor. -This command works for at least the Xen, QEMU/KVM and vSphere/ESX hypervisors. +Some hypervisors such as QEMU/KVM don't support live changes (especially +increasing) of the maximum memory limit. I<size> is a scaled integer (see B<NOTES> above); it defaults to kibibytes (blocks of 1024 bytes) unless you provide a suffix (and the older option name I<--kilobytes> is available as a deprecated synonym) . Libvirt rounds up to the nearest kibibyte. Some hypervisors require a larger granularity than KiB, and requests that are not an even multiple will be rounded up. For example, vSphere/ESX rounds the parameter up to mebibytes (1024 kibibytes). =item B<memtune> I<domain> [I<--hard-limit> B<size>] [I<--soft-limit> B<size>] [I<--swap-hard-limit> B<size>] [I<--min-guarantee> B<size>] [[I<--config>] [I<--live>] | [I<--current>]] -- 1.8.1.5

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[libvirt] [PATCH] lxc: Prevent shutting down the host
by Martin Kletzander 25 Mar '13

25 Mar '13

When the container has the same '/dev' mount as host (no chroot), calling domainShutdown(WithFlags) shouldn't shutdown the host it is running on. Signed-off-by: Martin Kletzander <mkletzan(a)redhat.com> --- This is also valid for 1.0.[23]-maint branches, so in case this gets ACK'd I'll either send a follow-up for those or push it there as well (if the ACK says so). src/lxc/lxc_driver.c | 45 ++++++++++++++++++++++++++++----------------- 1 file changed, 28 insertions(+), 17 deletions(-) diff --git a/src/lxc/lxc_driver.c b/src/lxc/lxc_driver.c index 8603078..ba14db7 100644 --- a/src/lxc/lxc_driver.c +++ b/src/lxc/lxc_driver.c @@ -1,5 +1,5 @@ /* - * Copyright (C) 2010-2012 Red Hat, Inc. + * Copyright (C) 2010-2013 Red Hat, Inc. * Copyright IBM Corp. 2008 * * lxc_driver.c: linux container driver functions @@ -2778,13 +2778,19 @@ lxcDomainShutdownFlags(virDomainPtr dom, virLXCDriverPtr driver = dom->conn->privateData; virLXCDomainObjPrivatePtr priv; virDomainObjPtr vm; + virDomainFSDefPtr root; char *vroot = NULL; int ret = -1; - int rc; + int rc = 0; + bool methodSignal; + bool methodInitctl; virCheckFlags(VIR_DOMAIN_SHUTDOWN_INITCTL | VIR_DOMAIN_SHUTDOWN_SIGNAL, -1); + methodSignal = !!(flags & VIR_DOMAIN_SHUTDOWN_SIGNAL); + methodInitctl = !!(flags & VIR_DOMAIN_SHUTDOWN_INITCTL); + lxcDriverLock(driver); vm = virDomainObjListFindByUUID(driver->domains, dom->uuid); lxcDriverUnlock(driver); @@ -2798,6 +2804,7 @@ lxcDomainShutdownFlags(virDomainPtr dom, } priv = vm->privateData; + root = virDomainGetRootFilesystem(vm->def); if (!virDomainObjIsActive(vm)) { virReportError(VIR_ERR_OPERATION_INVALID, @@ -2817,27 +2824,31 @@ lxcDomainShutdownFlags(virDomainPtr dom, goto cleanup; } - if (flags == 0 || - (flags & VIR_DOMAIN_SHUTDOWN_INITCTL)) { - if ((rc = virInitctlSetRunLevel(VIR_INITCTL_RUNLEVEL_POWEROFF, - vroot)) < 0) { + if (root && root->src) { + if (flags == 0) + methodSignal = methodInitctl = true; + } else if (methodInitctl) { + virReportError(VIR_ERR_OPERATION_UNSUPPORTED, "%s", + _("Cannot shutdown container using initctl " + "without separated namespace")); + goto cleanup; + } else { + methodSignal = true; + } + + if (methodInitctl) { + rc = virInitctlSetRunLevel(VIR_INITCTL_RUNLEVEL_POWEROFF, vroot); + if (rc < 0) goto cleanup; - } - if (rc == 0 && flags != 0 && - ((flags & ~VIR_DOMAIN_SHUTDOWN_INITCTL) == 0)) { + if (rc == 0 && !methodSignal) { virReportError(VIR_ERR_OPERATION_UNSUPPORTED, "%s", _("Container does not provide an initctl pipe")); goto cleanup; } - } else { - rc = 0; } - - if (rc == 0 && - (flags == 0 || - (flags & VIR_DOMAIN_SHUTDOWN_SIGNAL))) { - if (kill(priv->initpid, SIGTERM) < 0 && - errno != ESRCH) { + if (rc == 0 && methodSignal) { + ret = kill(priv->initpid, SIGTERM); + if (ret < 0 && errno != ESRCH) { virReportSystemError(errno, _("Unable to send SIGTERM to init pid %llu"), (unsigned long long)priv->initpid); -- 1.8.1.5

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[libvirt] [PATCH] make: obey WITH_TESTS; do not run test suite when --enable-test-suite=no
by TJ 25 Mar '13

25 Mar '13

make: obey WITH_TESTS; do not run test suite when --enable-test-suite=no Even when --enable-test-suite=no a build would run the test suite. Fix the Makefile so that tests are conditional on WITH_TESTS. Signed-off-by: TJ <libvirt(a)iam.tj> --- Makefile.am | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/Makefile.am b/Makefile.am index 5b1e27e..3b5e7a2 100644 --- a/Makefile.am +++ b/Makefile.am @@ -7,10 +7,14 @@ LCOV = lcov GENHTML = genhtml SUBDIRS = gnulib/lib include src daemon tools docs gnulib/tests \ - python tests po examples/domain-events/events-c examples/hellolibvirt \ + python po examples/domain-events/events-c examples/hellolibvirt \ examples/dominfo examples/domsuspend examples/python examples/apparmor \ examples/xml/nwfilter examples/openauth examples/systemtap +if WITH_TESTS +SUBDIRS += tests +endif + ACLOCAL_AMFLAGS = -I m4 -I gnulib/m4 XML_EXAMPLES = \ -- 1.8.1.2.433.g9808ce0.dirty

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[libvirt] [PATCH v2 0/4]Add startupPolicy attribute support for hard disks
by Guannan Ren 25 Mar '13

25 Mar '13

v1 to v2: added relax schema for disk of block and dir type removed original patch 3/5. The set of patches is trying to add 'startupPolicy' attribute support to the source element of hard disks. Policy levels are using the mandatory, requisite, optional levels as originally documented. For the 'optional' policy, there is a little difference from CDROM and Floppy which only drop its source path, for disks, if missing, the checking function will drop their definitions, because qemu doesn't allow missing source path for hard disk. If guest is using per-device boot element for its devices, after dropping one or more bootable device, the boot order will not be contiguous, the way here I use is to reorder them to make them contiguous. In this way, I introduce two new bit-operating functions virBitmapNextLastSetBit: Search for the last set bit before certain position. virBitmapNextLastClearBit: Search for the last clear bit before certain position. Guannan Ren [PATCH v2 1/4] conf: add startupPolicy attribute for harddisk [PATCH v2 2/4] util: add two functions to find last set or unset bit in bitmap [PATCH v2 3/4] qemu: drop disk definition if missing and reorder per-device boot sequence [PATCH v2 4/4] event: add hard disk dropping event reason enum docs/formatdomain.html.in | 9 ++++++--- docs/schemas/domaincommon.rng | 6 ++++++ include/libvirt/libvirt.h.in | 1 + src/conf/domain_conf.c | 21 +++++++++++++++------ src/conf/domain_conf.h | 1 + src/libvirt_private.syms | 2 ++ src/qemu/qemu_domain.c | 106 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++----------- src/util/virbitmap.c | 96 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ src/util/virbitmap.h | 6 ++++++ tests/virbitmaptest.c | 51 ++++++++++++++++++++++++++++++++++++++++++++++++++- 10 files changed, 278 insertions(+), 21 deletions(-)

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