In 2f4d2496a8 I didn't notice that one
part of virFileOpenAs doesn't actually call to virFileOpenAsNoFork but
rather includes a copy of the code from there.
No need to repeat common code.
* bootstrap.conf (gnulib_modules): Import calloc-posix.
* src/util/bridge.c (brInit): Use virSetCloseExec.
(brSetInterfaceUp): Adjust flags name.
* src/uml/uml_driver.c (umlSetCloseExec): Delete.
(umlStartVMDaemon): Use util version instead.
'unsigned a' and 'unsigned int a' are synonyms, but we generally
always spell out the 'int' in that case. Fixing this will avoid
a false positive in the next syntax-check commit.
* src/conf/node_device_conf.h (pci_config_address)
(_virNodeDevCapsDef): Prefer 'unsigned int' over 'unsigned'.
* src/xenapi/xenapi_driver.c (xenapiOpen, xenapiDomainReboot):
Reject unknown flags.
(xenapiDomainGetXMLDesc): Likewise, and pass known flags through
to XML generation.
* src/lxc/lxc_driver.c (lxcOpen, lxcDomainSetMemoryParameters)
(lxcDomainGetMemoryParameters): Reject unknown flags.
* src/lxc/lxc_container.c (lxcContainerStart): Rename flags to
cflags to reflect that it is not tied to libvirt.
Like commit 1740c381, but for libvirt-qemu.
* src/remote/qemu_protocol.x (qemu_monitor_command_args): Adjust
type to match API.
* src/qemu_protocol-structs: Update accordingly.
Continuation of commit 313ac7fd, and enforce things with a syntax
check.
Technically, virNetServerClientCalculateHandleMode is not printing
a mode_t, but rather a collection of VIR_EVENT_HANDLE_* bits;
however, these bits are < 8, so there is no different in the
output, and that was the easiest way to silence the new syntax check.
* cfg.mk (sc_flags_debug): New syntax check.
(exclude_file_name_regexp--sc_flags_debug): Add exemptions.
* src/fdstream.c (virFDStreamOpenFileInternal): Print flags in
hex, mode_t in octal.
* src/libvirt-qemu.c (virDomainQemuMonitorCommand)
(virDomainQemuAttach): Likewise.
* src/locking/lock_driver_nop.c (virLockManagerNopInit): Likewise.
* src/locking/lock_driver_sanlock.c (virLockManagerSanlockInit):
Likewise.
* src/locking/lock_manager.c: Likewise.
* src/qemu/qemu_migration.c: Likewise.
* src/qemu/qemu_monitor.c: Likewise.
* src/rpc/virnetserverclient.c
(virNetServerClientCalculateHandleMode): Print mode with %o.
I got bit in a debugging session on an uninstalled libvirtd; the
code tried to call out to the installed $LIBEXECDIR/libvirt_iohelper
instead of my just-built version. So I set a breakpoint and altered
the binary name to be "./src/libvirt_iohelper", and it still failed
because I don't have "." on my PATH.
According to POSIX, execvp only searches PATH if the name does
not contain a slash. Since we are trying to mimic that behavior,
an anchored name should be relative to the current working dir.
This tightens existing behavior, but most callers already pass
an absolute name or a name with no slashes, so it probably won't
be noticeable.
* src/util/util.c (virFindFileInPath): Anchored relative names do
not invoke a PATH search.
When replacing the default SEGV/ABORT/BUS signal handlers you
can't rely on the process being terminated after your custom
handler runs. It is neccessary to manually restore the default
handler and then re-raise the signal
* src/rpc/virnetserver.c: Restore default handler and raise
signal
When monitor is entered with qemuDomainObjEnterMonitorWithDriver, the
correct method for leaving and unlocking the monitor is
qemuDomainObjExitMonitorWithDriver.
Most of the code in these two functions is supposed to be identical but
currently it isn't (which is natural since the code is duplicated).
Let's move common parts of these functions into qemuMigrationPrepareAny.
This also fixes qemuMigrationPrepareTunnel which didn't store received
lockState in the domain object.
Asynchronous jobs may take long time to finish and may consist of
several phases which we need to now about to help with recovery/rollback
after libvirtd restarts.
Query commands are safe to be called during long running jobs (such as
migration). This patch makes them all work without the need to
special-case every single one of them.
The patch introduces new job.asyncCond condition and associated
job.asyncJob which are dedicated to asynchronous (from qemu monitor
point of view) jobs that can take arbitrarily long time to finish while
qemu monitor is still usable for other commands.
The existing job.active (and job.cond condition) is used all other
synchronous jobs (including the commands run during async job).
Locking schema is changed to use these two conditions. While asyncJob is
active, only allowed set of synchronous jobs is allowed (the set can be
different according to a particular asyncJob) so any method that
communicates to qemu monitor needs to check if it is allowed to be
executed during current asyncJob (if any). Once the check passes, the
method needs to normally acquire job.cond to ensure no other command is
running. Since domain object lock is released during that time, asyncJob
could have been started in the meantime so the method needs to recheck
the first condition. Then, normal jobs set job.active and asynchronous
jobs set job.asyncJob and optionally change the list of allowed job
groups.
Since asynchronous jobs only set job.asyncJob, other allowed commands
can still be run when domain object is unlocked (when communicating to
remote libvirtd or sleeping). To protect its own internal synchronous
commands, the asynchronous job needs to start a special nested job
before entering qemu monitor. The nested job doesn't check asyncJob, it
only acquires job.cond and sets job.active to block other jobs.
EnterMonitor and ExitMonitor methods are very similar to their
*WithDriver variants; consolidate them into EnterMonitorInternal and
ExitMonitorInternal to avoid (mainly future) code duplication.
Incrementally running 'make syntax-check' on a tree previously
built after commit 62dee6f but before 44036460 fails sc_po_check
(because the generated qemu_dispatch.h gained translatable strings).
This is a followup to commit addaa537 for that scenario.
* cfg.mk (sc_po_check): Add another prereq.
($(srcdir)/daemon/qemu_dispatch.h): Add rule.
The UML inotify handler would kill off guests when certain
conditions arise, but it forgot to remove transient guests
from the list of domains
* src/uml/uml_driver.c: Cleanup transient guests
Since a host can run several different virtualization types at
the same time, audit messages should allow domains to be identified.
Add a 'virt={qemu,kvm,uml,lxc,...}' key to domain audit messages
* src/conf/domain_audit.c: Identify virt type of guest
When passing through filesystems from the host to a guest, the
host filesystem passed must be audited
* src/conf/domain_audit.{c,h}: Add virDomainAuditFS
The LXC and UML drivers can both make use of auditing. Move
the qemu_audit.{c,h} files to src/conf/domain_audit.{c,h}
* src/conf/domain_audit.c: Rename from src/qemu/qemu_audit.c
* src/conf/domain_audit.h: Rename from src/qemu/qemu_audit.h
* src/Makefile.am: Remove qemu_audit.{c,h}, add domain_audit.{c,h}
* src/qemu/qemu_audit.h, src/qemu/qemu_cgroup.c,
src/qemu/qemu_command.c, src/qemu/qemu_driver.c,
src/qemu/qemu_hotplug.c, src/qemu/qemu_migration.c,
src/qemu/qemu_process.c: Update for changed audit API names
Given a PID, the QEMU driver reads /proc/$PID/cmdline and
/proc/$PID/environ to get the configuration. This is fed
into the ARGV->XML convertor to build an XML configuration
for the process.
/proc/$PID/exe is resolved to identify the full command
binary path
After checking for name/uuid uniqueness, an attempt is
made to connect to the monitor socket. If successful
then 'info status' and 'info kvm' are issued to determine
whether the CPUs are running and if KVM is enabled.
* src/qemu/qemu_driver.c: Implement virDomainQemuAttach
* src/qemu/qemu_process.h, src/qemu/qemu_process.c: Add
qemuProcessAttach to connect to the monitor of an
existing QEMU process
When attaching to an external QEMU process, it is neccessary
to check if the process is using KVM or not. This can be done
using a monitor command
* src/qemu/qemu_monitor.c, src/qemu/qemu_monitor.h,
src/qemu/qemu_monitor_json.c, src/qemu/qemu_monitor_json.h,
src/qemu/qemu_monitor_text.c, src/qemu/qemu_monitor_text.h: Add
API for checking if KVM is enabled
To enable attaching to externally launched QEMU, we need
to be able to reverse engineer a guest XML config based
on the argv for a PID in /proc
* src/qemu/qemu_command.c, src/qemu/qemu_command.h: Add
qemuParseCommandLinePid which extracts QEMU config from
argv in /proc, given a PID number
