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Re: [libvirt] [Qemu-devel] -vga std vs. -device VGA
by Eric Blake 15 Nov '13

15 Nov '13

[adding libvirt] On 11/13/2013 10:01 PM, Alexey Kardashevskiy wrote: > Hi everyone. > > Here is a problem with the SPAPR machine and a libvirt's habit to use > "-nodefaults". > > When we run QEMU with "-vga std", a VGA device is created from the > machine_init callback and if VGA is added, then we automatically add a PCI > USB OHCI adapter with a keyboard and everybody (SLOF, yaboot, guest kernel) > is happy - there are both input and output devices. > > However libvirt uses "-device VGA" to create a VGA device. In this case the > actual VGA device is created in vl.c and we (SPAPR) do not have control > over this process so we do not automatically create anything in addition to > VGA. As a result, yaboot fails as there is no input device. > > x86 creates a whole bunch of various devices including a keyboard > controller (i8042) even with "-nodefaults" but this is not true for SPAPR. Then libvirt needs to be taught to provide the same devices via -device that would be present during -vga. > > Since we (POWERPC folks) want everything to work as close to x86 as > possible, we need to do something about it :) Hmm, but adding automatic devices in a future qemu release compared to what you do now could be a regression - once libvirt is taught how to provide the correct devices for the qemu that exists now, wouldn't that mean that your automatic device adding creates duplicates? Libvirt uses -nodefaults for a reason - we really don't like automatic devices (especially when the set of WHAT is automatic is prone to change between qemu builds), and would much rather call out everything explicitly so that we can guarantee guest ABI stability across qemu upgrades. > > So the question is - is there any proper (i. e. qemu-upstreamable) way to > detect a VGA device presence and create additional devices (OHCI, keyboard, > mouse) as "-vga" does it now? The machine reset callback is too late for that. > > Or we should just print an error (in QEMU or SLOF) and do nothing and let > the user configure all required devices in libvirt? I'm in favor of printing an error if not enough devices were supplied, and fixing libvirt to supply the correct devices when it doesn't use -vga. -- Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org

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[libvirt] [PATCHv3] maint: Kill usage of atoi()
by Peter Krempa 15 Nov '13

15 Nov '13

Kill the use of atoi() and introduce syntax check to forbid it and it's friends (atol, atoll, atof, atoq). Also fix a typo in variable name holding the cylinders count of a disk pool (apparently unused). examples/domsuspend/suspend.c will need a larger scale refactor as the whole example file is broken thus it will be exempted from the syntax check for now. --- Notes: Version 3: - add TODO to examples/domsuspend/suspend.c to remove the exemption of the syntax check - exemption rule made specific for this file only cfg.mk | 9 +++++++++ examples/domsuspend/suspend.c | 1 + src/conf/storage_conf.h | 2 +- src/qemu/qemu_command.c | 8 ++++++-- src/storage/storage_backend_disk.c | 14 +++++++++----- src/xen/xend_internal.c | 17 +++++++++++++---- 6 files changed, 39 insertions(+), 12 deletions(-) diff --git a/cfg.mk b/cfg.mk index befd231..838934a 100644 --- a/cfg.mk +++ b/cfg.mk @@ -869,6 +869,12 @@ sc_prohibit_getenv: halt='Use virGetEnv{Allow,Block}SUID instead of getenv' \ $(_sc_search_regexp) +sc_prohibit_atoi: + @prohibit='\bato(i|f|l|ll|q) *\(' \ + halt='Use virStrToLong* instead of atoi, atol, atof, atoq, atoll' \ + $(_sc_search_regexp) + + # We don't use this feature of maint.mk. prev_version_file = /dev/null @@ -1040,3 +1046,6 @@ exclude_file_name_regexp--sc_prohibit_int_ijk = \ exclude_file_name_regexp--sc_prohibit_getenv = \ ^tests/.*\.[ch]$$ + +exclude_file_name_regexp--sc_prohibit_atoi= \ + ^examples/domsuspend/suspend.c$$ diff --git a/examples/domsuspend/suspend.c b/examples/domsuspend/suspend.c index 6a0f5c9..5f7a890 100644 --- a/examples/domsuspend/suspend.c +++ b/examples/domsuspend/suspend.c @@ -104,6 +104,7 @@ int main(int argc, char **argv) { } if (argc > 1) { + /* TODO: remove exclusion of this file from syntax check denying atoi */ id = atoi(argv[1]); } if (id == 0) { diff --git a/src/conf/storage_conf.h b/src/conf/storage_conf.h index f062bd8..05c291e 100644 --- a/src/conf/storage_conf.h +++ b/src/conf/storage_conf.h @@ -227,7 +227,7 @@ struct _virStoragePoolSourceDevice { * the geometry data is needed */ struct _geometry { - int cyliders; + int cylinders; int heads; int sectors; } geometry; diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c index 966aa0d..25beedf 100644 --- a/src/qemu/qemu_command.c +++ b/src/qemu/qemu_command.c @@ -3663,8 +3663,12 @@ qemuBuildDriveURIString(virConnectPtr conn, if (disk->src && virAsprintf(&volimg, "/%s", disk->src) < 0) goto cleanup; - if (disk->hosts->port) { - port = atoi(disk->hosts->port); + if (disk->hosts->port && + virStrToLong_i(disk->hosts->port, NULL, 0, &port) < 0) { + virReportError(VIR_ERR_INTERNAL_ERROR, + _("failed to parse network port '%s'"), + disk->hosts->port); + goto cleanup; } if (disk->hosts->socket && diff --git a/src/storage/storage_backend_disk.c b/src/storage/storage_backend_disk.c index 4e53ec5..a7a7d0e 100644 --- a/src/storage/storage_backend_disk.c +++ b/src/storage/storage_backend_disk.c @@ -280,12 +280,16 @@ virStorageBackendDiskMakePoolGeometry(virStoragePoolObjPtr pool, char **const groups, void *data ATTRIBUTE_UNUSED) { + virStoragePoolSourceDevicePtr device = &(pool->def->source.devices[0]); + if (virStrToLong_i(groups[0], NULL, 0, &device->geometry.cylinders) < 0 || + virStrToLong_i(groups[1], NULL, 0, &device->geometry.heads) < 0 || + virStrToLong_i(groups[2], NULL, 0, &device->geometry.sectors) < 0) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", + _("Failed to create disk pool geometry")); + return -1; + } - pool->def->source.devices[0].geometry.cyliders = atoi(groups[0]); - pool->def->source.devices[0].geometry.heads = atoi(groups[1]); - pool->def->source.devices[0].geometry.sectors = atoi(groups[2]); - - return 0; + return 0; } static int diff --git a/src/xen/xend_internal.c b/src/xen/xend_internal.c index dc57350..771288c 100644 --- a/src/xen/xend_internal.c +++ b/src/xen/xend_internal.c @@ -290,10 +290,19 @@ xend_req(int fd, char **content) if (STREQ(buffer, "\r\n")) break; - if (istartswith(buffer, "Content-Length: ")) - content_length = atoi(buffer + 16); - else if (istartswith(buffer, "HTTP/1.1 ")) - retcode = atoi(buffer + 9); + if (istartswith(buffer, "Content-Length: ")) { + if (virStrToLong_i(buffer + 16, NULL, 10, &content_length) < 0) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", + _("failed to parse Xend response content length")); + return -1; + } + } else if (istartswith(buffer, "HTTP/1.1 ")) { + if (virStrToLong_i(buffer + 9, NULL, 10, &retcode) < 0) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", + _("failed to parse Xend response return code")); + return -1; + } + } } VIR_FREE(buffer); -- 1.8.4.3

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[libvirt] [PATCH] qemuMonitorIO: Don't use @mon after it's unrefed
by Michal Privoznik 15 Nov '13

15 Nov '13

https://bugzilla.redhat.com/show_bug.cgi?id=1018267 The aim of virObject refing and urefing is to tell where the object is to be used and when is no longer needed. Hence any object shouldn't be used after it has been unrefed, as we might be the last to hold the reference. The better way is to call virObjectUnref() *after* the last object usage. In this specific case, the monitor EOF handler was called after the qemuMonitorIO called virObjectUnref. Not only that @mon was disposed (which is not used in the handler anyway) but the @mon->vm which is causing a SIGSEGV: 2013-11-15 10:17:54.425+0000: 20110: error : qemuMonitorIO:688 : internal error: early end of file from monitor: possible problem: qemu-kvm: -incoming tcp:01.01.01.0:49152: Failed to bind socket: Cannot assign requested address Program received signal SIGSEGV, Segmentation fault. qemuProcessHandleMonitorEOF (mon=<optimized out>, vm=0x7fb728004170) at qemu/qemu_process.c:299 299 if (priv->beingDestroyed) { (gdb) p *priv Cannot access memory at address 0x0 (gdb) p vm $1 = (virDomainObj *) 0x7fb728004170 (gdb) p *vm $2 = {parent = {parent = {magic = 3735928559, refs = 0, klass = 0xdeadbeef}, lock = {lock = {__data = {__lock = 2, __count = 0, __owner = 20110, __nusers = 1, __kind = 0, __spins = 0, __list = {__prev = 0x0, __next = 0x0}}, __size = "\002\000\000\000\000\000\000\000\216N\000\000\001", '\000' <repeats 26 times>, __align = 2}}}, pid = 0, state = {state = 0, reason = 0}, autostart = 0, persistent = 0, updated = 0, def = 0x0, newDef = 0x0, snapshots = 0x0, current_snapshot = 0x0, hasManagedSave = false, privateData = 0x0, privateDataFreeFunc = 0x0, taint = 304} Signed-off-by: Michal Privoznik <mprivozn(a)redhat.com> --- src/qemu/qemu_monitor.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/src/qemu/qemu_monitor.c b/src/qemu/qemu_monitor.c index 30315b3..935f140 100644 --- a/src/qemu/qemu_monitor.c +++ b/src/qemu/qemu_monitor.c @@ -721,33 +721,33 @@ qemuMonitorIO(int watch, int fd, int events, void *opaque) { /* We have to unlock to avoid deadlock against command thread, * but is this safe ? I think it is, because the callback * will try to acquire the virDomainObjPtr mutex next */ if (eof) { qemuMonitorEofNotifyCallback eofNotify = mon->cb->eofNotify; virDomainObjPtr vm = mon->vm; /* Make sure anyone waiting wakes up now */ virCondSignal(&mon->notify); virObjectUnlock(mon); - virObjectUnref(mon); VIR_DEBUG("Triggering EOF callback"); (eofNotify)(mon, vm, mon->callbackOpaque); + virObjectUnref(mon); } else if (error) { qemuMonitorErrorNotifyCallback errorNotify = mon->cb->errorNotify; virDomainObjPtr vm = mon->vm; /* Make sure anyone waiting wakes up now */ virCondSignal(&mon->notify); virObjectUnlock(mon); - virObjectUnref(mon); VIR_DEBUG("Triggering error callback"); (errorNotify)(mon, vm, mon->callbackOpaque); + virObjectUnref(mon); } else { virObjectUnlock(mon); virObjectUnref(mon); } } static qemuMonitorPtr qemuMonitorOpenInternal(virDomainObjPtr vm, int fd, -- 1.8.3.2

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[libvirt] [PATCHv2] maint: Kill usage of atoi()
by Peter Krempa 15 Nov '13

15 Nov '13

Kill the use of atoi() and introduce syntax check to forbit it and it's friends (atol, atoll, atof, atoq). Also fix a typo in variable name holding the cylinders count of a disk pool (apparently unused). --- cfg.mk | 9 +++++++++ src/conf/storage_conf.h | 2 +- src/qemu/qemu_command.c | 8 ++++++-- src/storage/storage_backend_disk.c | 14 +++++++++----- src/xen/xend_internal.c | 17 +++++++++++++---- 5 files changed, 38 insertions(+), 12 deletions(-) diff --git a/cfg.mk b/cfg.mk index befd231..901e307 100644 --- a/cfg.mk +++ b/cfg.mk @@ -869,6 +869,12 @@ sc_prohibit_getenv: halt='Use virGetEnv{Allow,Block}SUID instead of getenv' \ $(_sc_search_regexp) +sc_prohibit_atoi: + @prohibit='\bato(i|f|l|ll|q) *\(' \ + halt='Use virStrToLong* instead of atoi, atol, atof, atoq, atoll' \ + $(_sc_search_regexp) + + # We don't use this feature of maint.mk. prev_version_file = /dev/null @@ -1040,3 +1046,6 @@ exclude_file_name_regexp--sc_prohibit_int_ijk = \ exclude_file_name_regexp--sc_prohibit_getenv = \ ^tests/.*\.[ch]$$ + +exclude_file_name_regexp--sc_prohibit_atoi= \ + ^examples/.*\.[ch]$$ diff --git a/src/conf/storage_conf.h b/src/conf/storage_conf.h index f062bd8..05c291e 100644 --- a/src/conf/storage_conf.h +++ b/src/conf/storage_conf.h @@ -227,7 +227,7 @@ struct _virStoragePoolSourceDevice { * the geometry data is needed */ struct _geometry { - int cyliders; + int cylinders; int heads; int sectors; } geometry; diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c index 966aa0d..25beedf 100644 --- a/src/qemu/qemu_command.c +++ b/src/qemu/qemu_command.c @@ -3663,8 +3663,12 @@ qemuBuildDriveURIString(virConnectPtr conn, if (disk->src && virAsprintf(&volimg, "/%s", disk->src) < 0) goto cleanup; - if (disk->hosts->port) { - port = atoi(disk->hosts->port); + if (disk->hosts->port && + virStrToLong_i(disk->hosts->port, NULL, 0, &port) < 0) { + virReportError(VIR_ERR_INTERNAL_ERROR, + _("failed to parse network port '%s'"), + disk->hosts->port); + goto cleanup; } if (disk->hosts->socket && diff --git a/src/storage/storage_backend_disk.c b/src/storage/storage_backend_disk.c index 4e53ec5..a7a7d0e 100644 --- a/src/storage/storage_backend_disk.c +++ b/src/storage/storage_backend_disk.c @@ -280,12 +280,16 @@ virStorageBackendDiskMakePoolGeometry(virStoragePoolObjPtr pool, char **const groups, void *data ATTRIBUTE_UNUSED) { + virStoragePoolSourceDevicePtr device = &(pool->def->source.devices[0]); + if (virStrToLong_i(groups[0], NULL, 0, &device->geometry.cylinders) < 0 || + virStrToLong_i(groups[1], NULL, 0, &device->geometry.heads) < 0 || + virStrToLong_i(groups[2], NULL, 0, &device->geometry.sectors) < 0) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", + _("Failed to create disk pool geometry")); + return -1; + } - pool->def->source.devices[0].geometry.cyliders = atoi(groups[0]); - pool->def->source.devices[0].geometry.heads = atoi(groups[1]); - pool->def->source.devices[0].geometry.sectors = atoi(groups[2]); - - return 0; + return 0; } static int diff --git a/src/xen/xend_internal.c b/src/xen/xend_internal.c index dc57350..771288c 100644 --- a/src/xen/xend_internal.c +++ b/src/xen/xend_internal.c @@ -290,10 +290,19 @@ xend_req(int fd, char **content) if (STREQ(buffer, "\r\n")) break; - if (istartswith(buffer, "Content-Length: ")) - content_length = atoi(buffer + 16); - else if (istartswith(buffer, "HTTP/1.1 ")) - retcode = atoi(buffer + 9); + if (istartswith(buffer, "Content-Length: ")) { + if (virStrToLong_i(buffer + 16, NULL, 10, &content_length) < 0) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", + _("failed to parse Xend response content length")); + return -1; + } + } else if (istartswith(buffer, "HTTP/1.1 ")) { + if (virStrToLong_i(buffer + 9, NULL, 10, &retcode) < 0) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", + _("failed to parse Xend response return code")); + return -1; + } + } } VIR_FREE(buffer); -- 1.8.4.3

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[libvirt] [PATCH] Fix migration with qemu 1.6
by whitearchey 15 Nov '13

15 Nov '13

QEMU 1.6.0 introduced new migration status: setup Libvirt does not expect such string in QMP and refuses to migrate with error "unexpected migration status in setup" This patch fixes it. diff --git a/src/qemu/qemu_migration.c b/src/qemu/qemu_migration.c index a3d986f..4b5fdba 100644 --- a/src/qemu/qemu_migration.c +++ b/src/qemu/qemu_migration.c @@ -1644,6 +1644,10 @@ qemuMigrationUpdateJobStatus(virQEMUDriverPtr driver, _("%s: %s"), job, _("is not active")); break; + case QEMU_MONITOR_MIGRATION_STATUS_SETUP: + ret = 0; + break; + case QEMU_MONITOR_MIGRATION_STATUS_ACTIVE: priv->job.info.fileTotal = priv->job.status.disk_total; priv->job.info.fileRemaining = priv->job.status.disk_remaining; diff --git a/src/qemu/qemu_monitor.c b/src/qemu/qemu_monitor.c index 30315b3..0d4598e 100644 --- a/src/qemu/qemu_monitor.c +++ b/src/qemu/qemu_monitor.c @@ -114,7 +114,7 @@ VIR_ONCE_GLOBAL_INIT(qemuMonitor) VIR_ENUM_IMPL(qemuMonitorMigrationStatus, QEMU_MONITOR_MIGRATION_STATUS_LAST, - "inactive", "active", "completed", "failed", "cancelled") + "inactive", "active", "completed", "failed", "cancelled", "setup") VIR_ENUM_IMPL(qemuMonitorMigrationCaps, QEMU_MONITOR_MIGRATION_CAPS_LAST, diff --git a/src/qemu/qemu_monitor.h b/src/qemu/qemu_monitor.h index f893b1f..eabf000 100644 --- a/src/qemu/qemu_monitor.h +++ b/src/qemu/qemu_monitor.h @@ -397,6 +397,7 @@ enum { QEMU_MONITOR_MIGRATION_STATUS_COMPLETED, QEMU_MONITOR_MIGRATION_STATUS_ERROR, QEMU_MONITOR_MIGRATION_STATUS_CANCELLED, + QEMU_MONITOR_MIGRATION_STATUS_SETUP, QEMU_MONITOR_MIGRATION_STATUS_LAST };

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[libvirt] Fwd: Re: the case for volatile nwfilters
by Stefan Berger 15 Nov '13

15 Nov '13

For some reason this message could not be sent to the list. On 10/30/2013 05:57 AM, Laine Stump wrote: > On 10/29/2013 06:33 PM, Dan Kenigsberg wrote: >> I'd like oVirt to make a more extensive usage of libvirt's nwfilters in >> order to implement security groups, i.e. which protocol/port/host should >> be open on an interface. >> >> Since oVirt is cetrally-managed by ovirt-engine, filter definitions >> should be edited there and kept in its database. However, libivrt's >> domain xml requires to have a locally-defined filter as well: >> >> <devices> >> <interface type='bridge'> >> <filterref filter='filter-name'/> >> </interface> >> </devices> >> >> We can leave with it by defining an ad-hoc filter before staring a VM, >> deleting it after the VM stops, and collecting garbage (due to system >> crashes) occasionally. >> >> It would be nicer if we could instead have just-in-time filter >> definition such as >> >> <devices> >> <interface type='bridge'> >> <filter name='nameless'> >> <rule/> >> <rule/> >> <rule/> >> </filter> >> </interface> >> </devices> >> >> avoiding nwfilter persistence. Would something like this be beneficial >> to other libvirt users? Would it be easy to implement within libvirt? > My first thought when I saw the subject line was of adding a transient > "define and start" API similar to that used for domains and networks, > but of course nwfilters have no concept of "start" or "destroy", so they > wouldn't be able to follow the same semantics as transient domains and > networks anyway. > > Most likely Stefan made nwfilters use in domains all be references to > the actual nwfilters rather than having them contained in order to 1) > save duplication in the configuration now, and 2) potentially save > duplication in the kernel iptables rules in the future. I can see the > convenience, but wonder how much inefficiency it could lead to. > > Structurally it makes sense though, and the xml has conveniently named > the existing element as <filterref> so that <filter> is still available > - was there some premonition of this being requested in the future? :-) > > I recall that Stefan has been extremely busy elsewhere and unable to > completely follow libvir-list for awhile, so I'm Cc'ing him - Stefan, do > you have any opinion/wisdom on this? > Why can the client not call nwfilter-define to define a filter and have the filter referenced from the domain XML? Also many of the items in the domain XML only become active after a reboot of the VM (afaik) and I didn't want to change that with nwfilter. So you can at any time replace the referenced nwfilter and it will be instantiated when/while the VM is running or rejected if it cannot be instantiated. Stefan

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[libvirt] [PATCH 0/6] Fix couple of memleaks
by Michal Privoznik 14 Nov '13

14 Nov '13

Couple of patches I had lying around. I expect 4/6 to be controversial a bit. But it shouldn't be a show stopper for others. Michal Privoznik (6): networkBuildDhcpDaemonCommandLine: Don't leak @configstr networkBuildDhcpDaemonCommandLine: Don't leak @configfile virPCIDeviceBindToStub: Remove unused @oldDriverPath and @oldDriverName virThreadPoolFree: Join worker threads virDomainEventCallbackListFree: Don't leak @list->callbacks qemuProcessReconnectHelper: Don't create joinable thread src/conf/domain_event.c | 1 + src/network/bridge_driver.c | 2 ++ src/qemu/qemu_process.c | 2 +- src/util/virpci.c | 4 ---- src/util/virthreadpool.c | 9 +++++++++ 5 files changed, 13 insertions(+), 5 deletions(-) -- 1.8.3.2

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[libvirt] [PATCH] maint: Kill usage of atoi()
by Peter Krempa 14 Nov '13

14 Nov '13

Also fix a typo in variable name holding the cylinders count of a disk pool (apparently unused). --- cfg.mk | 10 ++++++++++ src/conf/storage_conf.h | 2 +- src/qemu/qemu_command.c | 8 ++++++-- src/storage/storage_backend_disk.c | 16 +++++++++++----- src/xen/xend_internal.c | 17 +++++++++++++---- 5 files changed, 41 insertions(+), 12 deletions(-) diff --git a/cfg.mk b/cfg.mk index befd231..4df81d2 100644 --- a/cfg.mk +++ b/cfg.mk @@ -869,6 +869,13 @@ sc_prohibit_getenv: halt='Use virGetEnv{Allow,Block}SUID instead of getenv' \ $(_sc_search_regexp) +sc_prohibit_atoi: + @prohibit='\batoi *\(' \ + exclude='exempt from syntax-check' \ + halt='Use virStrToLong* instead of atoi' \ + $(_sc_search_regexp) + + # We don't use this feature of maint.mk. prev_version_file = /dev/null @@ -1040,3 +1047,6 @@ exclude_file_name_regexp--sc_prohibit_int_ijk = \ exclude_file_name_regexp--sc_prohibit_getenv = \ ^tests/.*\.[ch]$$ + +exclude_file_name_regexp--sc_prohibit_atoi= \ + ^examples/.*\.[ch]$$ diff --git a/src/conf/storage_conf.h b/src/conf/storage_conf.h index f062bd8..05c291e 100644 --- a/src/conf/storage_conf.h +++ b/src/conf/storage_conf.h @@ -227,7 +227,7 @@ struct _virStoragePoolSourceDevice { * the geometry data is needed */ struct _geometry { - int cyliders; + int cylinders; int heads; int sectors; } geometry; diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c index 966aa0d..25beedf 100644 --- a/src/qemu/qemu_command.c +++ b/src/qemu/qemu_command.c @@ -3663,8 +3663,12 @@ qemuBuildDriveURIString(virConnectPtr conn, if (disk->src && virAsprintf(&volimg, "/%s", disk->src) < 0) goto cleanup; - if (disk->hosts->port) { - port = atoi(disk->hosts->port); + if (disk->hosts->port && + virStrToLong_i(disk->hosts->port, NULL, 0, &port) < 0) { + virReportError(VIR_ERR_INTERNAL_ERROR, + _("failed to parse network port '%s'"), + disk->hosts->port); + goto cleanup; } if (disk->hosts->socket && diff --git a/src/storage/storage_backend_disk.c b/src/storage/storage_backend_disk.c index 4e53ec5..1f30b06 100644 --- a/src/storage/storage_backend_disk.c +++ b/src/storage/storage_backend_disk.c @@ -280,12 +280,18 @@ virStorageBackendDiskMakePoolGeometry(virStoragePoolObjPtr pool, char **const groups, void *data ATTRIBUTE_UNUSED) { + pool = pool; + groups = groups; + virStoragePoolSourceDevicePtr device = &(pool->def->source.devices[0]); + if (virStrToLong_i(groups[0], NULL, 0, &device->geometry.cylinders) < 0 || + virStrToLong_i(groups[1], NULL, 0, &device->geometry.heads) < 0 || + virStrToLong_i(groups[2], NULL, 0, &device->geometry.sectors) < 0) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", + _("Failed to create disk pool geometry")); + return -1; + } - pool->def->source.devices[0].geometry.cyliders = atoi(groups[0]); - pool->def->source.devices[0].geometry.heads = atoi(groups[1]); - pool->def->source.devices[0].geometry.sectors = atoi(groups[2]); - - return 0; + return 0; } static int diff --git a/src/xen/xend_internal.c b/src/xen/xend_internal.c index dc57350..771288c 100644 --- a/src/xen/xend_internal.c +++ b/src/xen/xend_internal.c @@ -290,10 +290,19 @@ xend_req(int fd, char **content) if (STREQ(buffer, "\r\n")) break; - if (istartswith(buffer, "Content-Length: ")) - content_length = atoi(buffer + 16); - else if (istartswith(buffer, "HTTP/1.1 ")) - retcode = atoi(buffer + 9); + if (istartswith(buffer, "Content-Length: ")) { + if (virStrToLong_i(buffer + 16, NULL, 10, &content_length) < 0) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", + _("failed to parse Xend response content length")); + return -1; + } + } else if (istartswith(buffer, "HTTP/1.1 ")) { + if (virStrToLong_i(buffer + 9, NULL, 10, &retcode) < 0) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", + _("failed to parse Xend response return code")); + return -1; + } + } } VIR_FREE(buffer); -- 1.8.4.3

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[libvirt] [PATCH] LXC: make sure fuse thread start to run before we do clone
by Gao feng 14 Nov '13

14 Nov '13

I met a problem that container blocked by seteuid/setegid which is call in lxcContainerSetID on UP system and libvirt compiled with --with-fuse=yes. I looked into the glibc's codes, and found setxid in glibc calls futex() to wait for other threads to change their setxid_futex to 0(see setxid_mark_thread in glibc). since the process created by clone system call will not share the memory with the other threads and the context of memory doesn't changed until we call execl.(COW) So if the process which created by clone is called before fuse thread being stated, the new setxid_futex of fuse thread will not be saw in this process, it will be blocked forever. Maybe this problem should be fixed in glibc, but I send this patch as a quick fix. Signed-off-by: Gao feng <gaofeng(a)cn.fujitsu.com> --- src/lxc/lxc_controller.c | 13 ++++++++++++- src/lxc/lxc_fuse.c | 6 +++++- 2 files changed, 17 insertions(+), 2 deletions(-) diff --git a/src/lxc/lxc_controller.c b/src/lxc/lxc_controller.c index c8f68c0..ed83bb3 100644 --- a/src/lxc/lxc_controller.c +++ b/src/lxc/lxc_controller.c @@ -1977,7 +1977,18 @@ cleanup: static int virLXCControllerSetupFuse(virLXCControllerPtr ctrl) { - return lxcSetupFuse(&ctrl->fuse, ctrl->def); + int ret = lxcSetupFuse(&ctrl->fuse, ctrl->def); + + if (!ret) { + /* Wait for fuse thread starting run, so we + * can make sure the setxid_futex of fuse thread + * is 0(see start_thread of glibc), otherwise + * the lxcContainerChild will block at setxid. */ + virMutexLock(&ctrl->fuse->lock); + virMutexUnlock(&ctrl->fuse->lock); + } + + return ret; } static int diff --git a/src/lxc/lxc_fuse.c b/src/lxc/lxc_fuse.c index 9d12832..8cddfa8 100644 --- a/src/lxc/lxc_fuse.c +++ b/src/lxc/lxc_fuse.c @@ -272,6 +272,8 @@ static void lxcFuseDestroy(virLXCFusePtr fuse) static void lxcFuseRun(void *opaque) { virLXCFusePtr fuse = opaque; + /* Let libvirt_lxc continue. */ + virMutexUnlock(&fuse->lock); if (fuse_loop(fuse->fuse) < 0) virReportError(VIR_ERR_INTERNAL_ERROR, "%s", @@ -321,7 +323,9 @@ int lxcSetupFuse(virLXCFusePtr *f, virDomainDefPtr def) fuse_unmount(fuse->mountpoint, fuse->ch); goto cleanup1; } - + /* Get mutex lock, lxcFuseRun will unlock it. this will + * cause libvirt_lxc wait for the fuse thread starting. */ + virMutexLock(&fuse->lock); if (virThreadCreate(&fuse->thread, false, lxcFuseRun, (void *)fuse) < 0) { lxcFuseDestroy(fuse); -- 1.8.3.1

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[libvirt] [PATCH v2]virsh: track alias option and improve error message when option duplicates its alias
by Chen Hanxiao 14 Nov '13

14 Nov '13

From: Chen Hanxiao <chenhanxiao(a)cn.fujitsu.com> commit 2b172a8effa712aee97a21a64d2d02060958f9b2 allow alias to expand to opt=value pair. That means alias may not look alike since then. With this patch we will also track alias. If we type command with one option and another marked as its alias, we will get an error message like: error: option '--AA' duplicates its alias '--AAA' Signed-off-by: Chen Hanxiao <chenhanxiao(a)cn.fujitsu.com> --- v2: do not depend on orders of options in array. Alias could be anywhere except after the default one. tools/virsh.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/tools/virsh.c b/tools/virsh.c index bad78c9..ffead84 100644 --- a/tools/virsh.c +++ b/tools/virsh.c @@ -1071,6 +1071,7 @@ vshCmddefGetOption(vshControl *ctl, const vshCmdDef *cmd, const char *name, size_t i; const vshCmdOptDef *ret = NULL; char *alias = NULL; + char *tmp_name = NULL; if (STREQ(name, helpopt.name)) { return &helpopt; @@ -1101,6 +1102,13 @@ vshCmddefGetOption(vshControl *ctl, const vshCmdDef *cmd, const char *name, if (VIR_STRDUP(*optstr, value + 1) < 0) goto cleanup; } + tmp_name = vshMalloc(NULL, strlen(name) + 3); + snprintf(tmp_name, strlen(name) + 3, "--%s", name); + if (strstr(rl_line_buffer, tmp_name)) { + vshError(ctl, _("option '--%s' duplicates its alias '--%s'"), + cmd->opts[i].name, name); + goto cleanup; + } continue; } if ((*opts_seen & (1 << i)) && opt->type != VSH_OT_ARGV) { @@ -1119,6 +1127,7 @@ vshCmddefGetOption(vshControl *ctl, const vshCmdDef *cmd, const char *name, cmd->name, name); } cleanup: + VIR_FREE(tmp_name); VIR_FREE(alias); return ret; } -- 1.8.2.1

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