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  1. 23 3月, 2018 2 次提交
    • D
      remote: remove some __sun conditionals · da1ade7a
      由 Daniel P. Berrangé 提交于 
      The libvirtd daemon has some arbitrary logic to drop privileges, but
only on Solaris platforms. This was added during Xen days, when Xen was
the only driver running in libvirtd. There's no expectation or testing
that this works with the new libxl stack, nor whether dropping
privileges breaks any of the secondary drivers. Finally, we'll be
splitting drivers out into their own independant daemons, so this won't
be applicable to libvirtd in future anyway.

The remote driver client meanwhile arbitrarily disables daemon
auto-spawn when connecting as non-root, breaking a key feature of
libvirt unprivileged connections.

Since we've not had any contributions for Solaris since circa 2012
and we don't do any CI testing we should consider this platform
unmaintained and thus reasonable to remove this cruft. If someone steps
forward to maintain Solaris again, this code would need re-evaluating to
come up with something more targetted.

There's various __sun conditionals in the Xen driver code, but those are
not touched. This is all for the legacy Xen driver, which will be
entirely removed at some point in future, so not benefit to hacking out
just the Solaris parts.
Reviewed-by: NAndrea Bolognani <abologna@redhat.com>
Signed-off-by: NDaniel P. Berrangé <berrange@redhat.com>
      da1ade7a
    • D
      rpc: remove remains of obsolete log_buffer_size config parameter · 65824a7e
      由 Daniel P. Berrangé 提交于 
      The global log buffer feature was deleted in:

  commit c0c8c1d7
  Author: Daniel P. Berrange <berrange@redhat.com>
  Date:   Mon Mar 3 14:54:33 2014 +0000

    Remove global log buffer feature entirely

    A earlier commit changed the global log buffer so that it only
    records messages that are explicitly requested via the log
    filters setting. This removes the performance burden, and
    improves the signal/noise ratio for messages in the global
    buffer. At the same time though, it is somewhat pointless, since
    all the recorded log messages are already going to be sent to an
    explicit log output like syslog, stderr or the journal. The
    global log buffer is thus just duplicating this data on stderr
    upon crash.

    The log_buffer_size config parameter is left in the augeas
    lens to prevent breakage for users on upgrade. It is however
    completely ignored hereafter.
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>

This was in the 1.2.3 release, and 4 years is sufficient time for a
graceful upgrade path for augeas, so all remaining traces are now
removed.
Signed-off-by: NDaniel P. Berrangé <berrange@redhat.com>
      65824a7e
  3. 16 3月, 2018 4 次提交
  5. 15 3月, 2018 1 次提交
  7. 14 3月, 2018 2 次提交
  9. 13 3月, 2018 1 次提交
    • J
      libvirtd: fix potential deadlock when reloading · 33c6eb96
      由 Jim Fehlig 提交于 
      It is possible to deadlock libvirtd when concurrently starting a domain
and restarting the daemon. Threads involved in the deadlock are

Thread 4 (Thread 0x7fc13b53e700 (LWP 64084)):
/lib64/libpthread.so.0
    at util/virthread.c:154
    at qemu/qemu_monitor.c:1083
    cmd=0x7fc110017700, scm_fd=-1, reply=0x7fc13b53d318) at
qemu/qemu_monitor_json.c:305
cmd=0x7fc110017700,
    reply=0x7fc13b53d318) at qemu/qemu_monitor_json.c:335
    at qemu/qemu_monitor_json.c:1298
    at qemu/qemu_monitor.c:1697
    vm=0x7fc110003d00, asyncJob=QEMU_ASYNC_JOB_START) at qemu/qemu_process.c:1763
vm=0x7fc110003d00,
    asyncJob=6, logCtxt=0x7fc1100089c0) at qemu/qemu_process.c:1835
    vm=0x7fc110003d00, asyncJob=6, logCtxt=0x7fc1100089c0) at
qemu/qemu_process.c:2180
driver=0x7fc12004e1e0,
    vm=0x7fc110003d00, asyncJob=QEMU_ASYNC_JOB_START, incoming=0x0, snapshot=0x0,
    vmop=VIR_NETDEV_VPORT_PROFILE_OP_CREATE, flags=17) at qemu/qemu_process.c:6111
driver=0x7fc12004e1e0,
    vm=0x7fc110003d00, updatedCPU=0x0, asyncJob=QEMU_ASYNC_JOB_START,
migrateFrom=0x0,
    migrateFd=-1, migratePath=0x0, snapshot=0x0,
vmop=VIR_NETDEV_VPORT_PROFILE_OP_CREATE,
    flags=17) at qemu/qemu_process.c:6334
    xml=0x7fc110000ed0 "<!--\nWARNING: THIS IS AN AUTO-GENERATED FILE.
CHANGES TO IT ARE LIKELY TO BE\nOVERWRITTEN AND LOST. Changes to this xml
configuration should be made using:\n  virsh edit testvv\nor other
applicati"..., flags=0) at qemu/qemu_driver.c:1776
...

Thread 1 (Thread 0x7fc143c66880 (LWP 64081)):
/lib64/libpthread.so.0
    at util/virthread.c:122
conf/nwfilter_conf.c:159
sig=0x7ffe0a831e30,
    opaque=0x0) at remote/remote_daemon.c:724
    opaque=0x558c5328b230) at rpc/virnetdaemon.c:654
    at util/vireventpoll.c:508
rpc/virnetdaemon.c:858
remote/remote_daemon.c:1496
(gdb) thr 1
[Switching to thread 1 (Thread 0x7fc143c66880 (LWP 64081))]
/lib64/libpthread.so.0
(gdb) f 1
    at util/virthread.c:122
122	    pthread_rwlock_wrlock(&m->lock);
(gdb) p updateLock
$1 = {lock = {__data = {__lock = 0, __nr_readers = 1, __readers_wakeup = 0,
      __writer_wakeup = 0, __nr_readers_queued = 0, __nr_writers_queued = 1,
__writer = 0,
      __shared = 0, __rwelision = 0 '\000', __pad1 = "\000\000\000\000\000\000",
      __pad2 = 0, __flags = 0},
    __size = "\000\000\000\000\001", '\000' <repeats 15 times>, "\001",
'\000' <repeats 34 times>, __align = 4294967296}}

Reloading of the nwfilter driver is stuck waiting for a write lock, which
already has a reader (from qemuDomainCreateXML) in the critical section.
Since the reload occurs in the context of the main event loop thread,
libvirtd becomes deadlocked. The deadlock can be avoided by offloading
the reload work to a thread.
Signed-off-by: NJim Fehlig <jfehlig@suse.com>
Reviewed-by: NDaniel P. Berrangé <berrange@redhat.com>
      33c6eb96
  11. 09 3月, 2018 1 次提交
  13. 06 3月, 2018 1 次提交
  15. 26 2月, 2018 1 次提交
  17. 22 2月, 2018 6 次提交
  19. 09 2月, 2018 1 次提交
  21. 03 11月, 2017 1 次提交
    • A
      Remove backslash alignment attempts · 3e7db8d3
      由 Andrea Bolognani 提交于 
      Right-aligning backslashes when defining macros or using complex
commands in Makefiles looks cute, but as soon as any changes is
required to the code you end up with either distractingly broken
alignment or unnecessarily big diffs where most of the changes
are just pushing all backslashes a few characters to one side.

Generated using

  $ git grep -El '[[:blank:]][[:blank:]]\\$' | \
    grep -E '*\.([chx]|am|mk)$$' | \
    while read f; do \
      sed -Ei 's/[[:blank:]]*[[:blank:]]\\$/ \\/g' "$f"; \
    done
Signed-off-by: NAndrea Bolognani <abologna@redhat.com>
      3e7db8d3
  23. 19 10月, 2017 1 次提交
  25. 14 10月, 2017 1 次提交
  27. 25 9月, 2017 1 次提交
  29. 29 8月, 2017 2 次提交
  31. 26 8月, 2017 1 次提交
  33. 04 8月, 2017 1 次提交
  35. 25 6月, 2017 1 次提交
    • J
      events: Avoid double free possibility on remote call failure · 2065499b
      由 John Ferlan 提交于 
      If a remote call fails during event registration (more than likely from
a network failure or remote libvirtd restart timed just right), then when
calling the virObjectEventStateDeregisterID we don't want to call the
registered @freecb function because that breaks our contract that we
would only call it after succesfully returning.  If the @freecb routine
were called, it could result in a double free from properly coded
applications that free their opaque data on failure to register, as seen
in the following details:

    Program terminated with signal 6, Aborted.
    #0  0x00007fc45cba15d7 in raise
    #1  0x00007fc45cba2cc8 in abort
    #2  0x00007fc45cbe12f7 in __libc_message
    #3  0x00007fc45cbe86d3 in _int_free
    #4  0x00007fc45d8d292c in PyDict_Fini
    #5  0x00007fc45d94f46a in Py_Finalize
    #6  0x00007fc45d960735 in Py_Main
    #7  0x00007fc45cb8daf5 in __libc_start_main
    #8  0x0000000000400721 in _start

The double dereference of 'pyobj_cbData' is triggered in the following way:

    (1) libvirt_virConnectDomainEventRegisterAny is invoked.
    (2) the event is successfully added to the event callback list
        (virDomainEventStateRegisterClient in
        remoteConnectDomainEventRegisterAny returns 1 which means ok).
    (3) when function remoteConnectDomainEventRegisterAny is hit,
        network connection disconnected coincidently (or libvirtd is
        restarted) in the context of function 'call' then the connection
        is lost and the function 'call' failed, the branch
        virObjectEventStateDeregisterID is therefore taken.
    (4) 'pyobj_conn' is dereferenced the 1st time in
        libvirt_virConnectDomainEventFreeFunc.
    (5) 'pyobj_cbData' (refered to pyobj_conn) is dereferenced the
         2nd time in libvirt_virConnectDomainEventRegisterAny.
    (6) the double free error is triggered.

Resolve this by adding a @doFreeCb boolean in order to avoid calling the
freeCb in virObjectEventStateDeregisterID for any remote call failure in
a remoteConnect*EventRegister* API. For remoteConnect*EventDeregister* calls,
the passed value would be true indicating they should run the freecb if it
exists; whereas, it's false for the remote call failure path.

Patch based on the investigation and initial patch posted by
fangying <fangying1@huawei.com>.
      2065499b
  37. 13 6月, 2017 1 次提交
  39. 05 6月, 2017 1 次提交
  41. 26 5月, 2017 1 次提交
  43. 18 5月, 2017 8 次提交