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Yunjian Wang 41d4e5ec9f vhost-user: fix watcher need be removed when vhost-user hotplug
"nc" is freed after hotplug vhost-user, but the watcher is not removed.
The QEMU crash when the watcher access the "nc" when socket disconnects.

    Program received signal SIGSEGV, Segmentation fault.
    #0  object_get_class (obj=obj@entry=0x2) at qom/object.c:750
    #1  0x00007f9bb4180da1 in qemu_chr_fe_disconnect (be=<optimized out>) at chardev/char-fe.c:372
    #2  0x00007f9bb40d1100 in net_vhost_user_watch (chan=<optimized out>, cond=<optimized out>, opaque=<optimized out>) at net/vhost-user.c:188
    #3  0x00007f9baf97f99a in g_main_context_dispatch () from /usr/lib64/libglib-2.0.so.0
    #4  0x00007f9bb41d7ebc in glib_pollfds_poll () at util/main-loop.c:213
    #5  os_host_main_loop_wait (timeout=<optimized out>) at util/main-loop.c:261
    #6  main_loop_wait (nonblocking=nonblocking@entry=0) at util/main-loop.c:515
    #7  0x00007f9bb3e266a7 in main_loop () at vl.c:1917
    #8  main (argc=<optimized out>, argv=<optimized out>, envp=<optimized out>) at vl.c:4786

Signed-off-by: Yunjian Wang <wangyunjian@huawei.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2017-08-02 00:13:26 +03:00
accel accel: cleanup error output 2017-08-02 00:13:25 +03:00
audio trace-events: fix code style: %# -> 0x% 2017-08-01 12:13:07 +01:00
backends memory: Rename memory_region_init_ram() to memory_region_init_ram_nomigrate() 2017-07-14 17:59:42 +01:00
block trace-events: fix code style: print 0x before hex numbers 2017-08-01 12:13:07 +01:00
bsd-user bsd-user/main.c: Fix unused variable warning 2017-07-21 15:01:09 +01:00
chardev docs: fix broken paths to docs/devel/tracing.txt 2017-07-31 13:12:53 +03:00
contrib vhost-user-scsi: Introduce a vhost-user-scsi sample application 2017-06-15 11:18:40 +02:00
crypto docs: fix broken paths to docs/devel/tracing.txt 2017-07-31 13:12:53 +03:00
default-configs configure: Use an explicit CONFIG_IVSHMEM rather than CONFIG_EVENTFD 2017-07-20 14:58:19 +01:00
disas disas/microblaze: Add missing 'const' attributes 2017-07-04 09:22:20 +02:00
docs vhost-user: fix legacy cross-endian configurations 2017-08-02 00:13:25 +03:00
dtc@558cd81bdd dtc: Revert unintentional submodule downgrade from commit c2cabb3422 2017-03-16 14:11:15 +00:00
fpu softfloat: define floatx80_round() 2017-06-29 20:27:39 +02:00
fsdev block: remove timer canceling in throttle_config() 2017-07-18 15:14:35 +02:00
gdb-xml s390x/gdb: add gs registers 2017-07-14 12:29:49 +02:00
hw intel_iommu: use access_flags for iotlb 2017-08-02 00:13:25 +03:00
include intel_iommu: use access_flags for iotlb 2017-08-02 00:13:25 +03:00
io docs: fix broken paths to docs/devel/tracing.txt 2017-07-31 13:12:53 +03:00
libdecnumber
linux-headers linux header sync against v4.13-rc1 2017-07-18 10:55:16 +02:00
linux-user trace-events: fix code style: print 0x before hex numbers 2017-08-01 12:13:07 +01:00
migration trace-events: fix code style: print 0x before hex numbers 2017-08-01 12:13:07 +01:00
nbd trace-events: fix code style: print 0x before hex numbers 2017-08-01 12:13:07 +01:00
net vhost-user: fix watcher need be removed when vhost-user hotplug 2017-08-02 00:13:26 +03:00
pc-bios pseries: Update SLOF firmware image 2017-07-25 14:35:42 +10:00
pixman@87eea99e44
po po: add missing translations in de, fr, it, zh 2016-12-14 18:47:19 +00:00
qapi docs: fix broken paths to docs/devel/qapi-code-gen.txt 2017-07-31 13:12:41 +03:00
qga test-qga: add test for guest-get-osinfo 2017-07-18 05:49:01 -05:00
qobject qapi: Separate type QNull from QObject 2017-07-24 13:35:11 +02:00
qom docs: fix broken paths to docs/devel/tracing.txt 2017-07-31 13:12:53 +03:00
replay -----BEGIN PGP SIGNATURE----- 2017-06-05 10:09:14 +01:00
roms pseries: Update SLOF firmware image 2017-07-25 14:35:42 +10:00
scripts checkpatch: check trace-events code style 2017-08-01 12:13:07 +01:00
slirp slirp: Handle error returns from sosendoob() 2017-07-15 14:28:25 +02:00
stubs migration: Move check_migratable() into qdev.c 2017-05-17 12:04:59 +02:00
target trace-events: fix code style: print 0x before hex numbers 2017-08-01 12:13:07 +01:00
tcg docs: fix broken paths to docs/devel/atomics.txt 2017-07-31 13:12:47 +03:00
tests tests/bios-tables-test: Compiler warning fix 2017-08-02 00:13:26 +03:00
trace trace: add trace_event_get_state_backends() 2017-08-01 12:13:07 +01:00
ui docs: fix broken paths to docs/devel/tracing.txt 2017-07-31 13:12:53 +03:00
util docs: fix broken paths to docs/devel/tracing.txt 2017-07-31 13:12:53 +03:00
.dir-locals.el
.editorconfig add editorconfig 2017-07-20 09:56:56 +02:00
.exrc
.gdbinit .gdbinit: load QEMU sub-commands when gdb starts 2017-06-07 14:38:45 +01:00
.gitignore coccinelle: ignore ASTs pre-parsed cached C files 2017-07-19 14:45:15 -07:00
.gitmodules Add QemuMacDrivers as submodule 2017-05-11 09:45:15 +10:00
.mailmap
.shippable.yml shippable: add win32/64 targets 2017-07-18 10:58:36 +01:00
.travis.yml travis: move make -j flag out of script 2017-07-18 09:39:19 +01:00
arch_init.c audio: Rename hw/audio/audio.h to hw/audio/soundhw.h 2017-05-19 10:48:54 +02:00
atomic_template.h
balloon.c trace: switch to modular code generation for sub-directories 2017-01-31 17:11:18 +00:00
block.c block: Skip implicit nodes in query-block/blockstats 2017-07-24 15:06:04 +02:00
blockdev-nbd.c nbd: Fix regression on resiliency to port scan 2017-06-15 11:04:05 +02:00
blockdev.c block: Use JSON null instead of "" to disable backing file 2017-07-24 13:35:11 +02:00
blockjob.c fix: avoid an infinite loop or a dangling pointer problem in img_commit 2017-06-26 14:54:46 +02:00
bootdevice.c Makefile: Move bootdevice.o to common-obj-y 2017-07-04 14:39:27 +02:00
bt-host.c
bt-vhci.c
Changelog
CODING_STYLE coding_style: add point about 0x in trace-events 2017-08-01 12:13:07 +01:00
configure util: Introduce include/qemu/cpuid.h 2017-07-24 12:42:55 +01:00
COPYING
COPYING.LIB
cpus-common.c *_run_on_cpu: introduce run_on_cpu_data type 2016-10-31 15:00:25 +01:00
cpus.c Convert error_report() to warn_report() 2017-07-13 13:49:58 +02:00
device_tree.c device_tree: fix compiler warnings (clang 5) 2017-05-07 09:57:51 +03:00
device-hotplug.c
disas.c Fix Thumb-1 BE32 execution and disassembly. 2017-02-07 18:29:59 +00:00
dma-helpers.c block: explicitly acquire aiocontext in bottom halves that need it 2017-02-21 11:39:39 +00:00
dump.c dump: Acquire BQL around vm_start() in dump thread 2017-05-05 12:10:00 +02:00
exec.c cpu: Convert to DEFINE_PROP_LINK 2017-07-14 12:04:43 +02:00
gdbstub.c Use qemu_tolower() and qemu_toupper(), not tolower() and toupper() 2017-07-21 10:32:41 +01:00
HACKING HACKING: document #include order 2017-01-03 16:38:47 +00:00
hax-stub.c Plumb the HAXM-based hardware acceleration support 2017-01-19 22:07:46 +01:00
hmp-commands-info.hx s390x/migration: Monitor commands for storage attributes 2017-07-14 12:29:47 +02:00
hmp-commands.hx s390x/kvm/migration/cpumodel: fixes, enhancements and cleanups 2017-07-14 14:19:35 +01:00
hmp.c migration: Use JSON null instead of "" to reset parameter to default 2017-07-24 13:35:11 +02:00
hmp.h hmp: add hmp analogue for qmp-chardev-change 2017-07-14 11:04:34 +02:00
ioport.c trace: switch to modular code generation for sub-directories 2017-01-31 17:11:18 +00:00
iothread.c monitor: add poll-* properties into query-iothreads result 2017-02-21 18:29:01 +00:00
LICENSE
MAINTAINERS MAINTAINERS: Improve the NetBSD regex pattern 2017-07-31 13:05:49 +03:00
Makefile build-sys: there is no qemu-ga.c 2017-07-31 13:06:38 +03:00
Makefile.objs configure: Don't build ivshmem tools unless CONFIG_IVSHMEM is set 2017-07-20 14:58:19 +01:00
Makefile.target trace: ensure .stp files are rebuilt if trace tool source changes 2017-08-01 10:36:29 +01:00
memory_ldst.inc.c exec: introduce memory_ldst.inc.c 2016-12-22 16:00:23 +01:00
memory_mapping.c dump: fix memory_mapping_filter leak 2017-06-04 18:42:55 +03:00
memory.c memory.h: Add memory_region_init_{ram, rom, rom_device}() handling migration 2017-07-14 17:59:42 +01:00
module-common.c
monitor.c monitor: Reduce handle_qmp_command() tracing overhead 2017-08-01 12:13:07 +01:00
numa.c memory: Rename memory_region_init_ram() to memory_region_init_ram_nomigrate() 2017-07-14 17:59:42 +01:00
os-posix.c
os-win32.c shutdown: Add source information to SHUTDOWN and RESET 2017-05-23 13:28:17 +02:00
qapi-schema.json docs: fix broken paths to docs/interop dir 2017-07-31 13:06:52 +03:00
qdev-monitor.c migration: Move remaining exported functions to migration/misc.h 2017-06-13 11:00:45 +02:00
qdict-test-data.txt
qemu-bridge-helper.c
qemu-doc.texi docs: document encryption options for qcow, qcow2 and luks 2017-07-11 17:44:57 +02:00
qemu-ga.texi qemu-ga: Remove stray 'q' in documentation 2016-10-28 18:17:23 +03:00
qemu-img-cmds.hx qemu-img: Check for backing image if specified during create 2017-07-18 15:27:37 +02:00
qemu-img.c maint: Reorder include directives for qemu-{nbd, io} 2017-07-24 08:53:08 -05:00
qemu-img.texi qemu-img: Check for backing image if specified during create 2017-07-18 15:27:37 +02:00
qemu-io-cmds.c block: Add PreallocMode to blk_truncate() 2017-07-11 17:45:01 +02:00
qemu-io.c block: rip out all traces of password prompting 2017-07-11 17:44:56 +02:00
qemu-nbd.c maint: Reorder include directives for qemu-{nbd, io} 2017-07-24 08:53:08 -05:00
qemu-nbd.texi nbd: Add qemu-nbd -D for human-readable description 2016-11-02 09:28:55 +01:00
qemu-option-trace.texi docs: update manpage for stderr->log rename 2017-02-13 13:38:31 +00:00
qemu-options-wrapper.h hxtool: emit Texinfo headings as @subsection 2017-01-16 17:52:35 +01:00
qemu-options.h
qemu-options.hx -----BEGIN PGP SIGNATURE----- 2017-07-18 09:16:43 +01:00
qemu-seccomp.c
qemu-tech.texi
qemu.nsi
qemu.sasl Default to GSSAPI (Kerberos) instead of DIGEST-MD5 for SASL 2017-05-09 14:41:47 +01:00
qmp.c qmp: Include parent type on 'qom-list-types' output 2017-07-17 15:41:30 -03:00
qtest.c char: add backend hotswap handler 2017-07-14 11:04:33 +02:00
README README: Add linux to macOS build info 2017-01-24 23:26:52 +03:00
replication.c
replication.h
rules.mak docs: create interop/ subdirectory 2017-06-15 11:18:39 +02:00
softmmu_template.h
thunk.c thunk: assert nb_fields is valid 2017-07-31 13:06:39 +03:00
tpm.c
trace-events trace-events: fix code style: %# -> 0x% 2017-08-01 12:13:07 +01:00
user-exec-stub.c stubs: group stubs for user-mode emulation 2017-01-16 17:52:35 +01:00
user-exec.c Replace 'struct ucontext' with 'ucontext_t' type 2017-07-20 10:10:28 +01:00
VERSION Update version for v2.10.0-rc0 release 2017-07-25 17:13:09 +01:00
version.rc
vl.c * gdbstub fixes (Alex) 2017-07-14 12:16:09 +01:00

         QEMU README
         ===========

QEMU is a generic and open source machine & userspace emulator and
virtualizer.

QEMU is capable of emulating a complete machine in software without any
need for hardware virtualization support. By using dynamic translation,
it achieves very good performance. QEMU can also integrate with the Xen
and KVM hypervisors to provide emulated hardware while allowing the
hypervisor to manage the CPU. With hypervisor support, QEMU can achieve
near native performance for CPUs. When QEMU emulates CPUs directly it is
capable of running operating systems made for one machine (e.g. an ARMv7
board) on a different machine (e.g. an x86_64 PC board).

QEMU is also capable of providing userspace API virtualization for Linux
and BSD kernel interfaces. This allows binaries compiled against one
architecture ABI (e.g. the Linux PPC64 ABI) to be run on a host using a
different architecture ABI (e.g. the Linux x86_64 ABI). This does not
involve any hardware emulation, simply CPU and syscall emulation.

QEMU aims to fit into a variety of use cases. It can be invoked directly
by users wishing to have full control over its behaviour and settings.
It also aims to facilitate integration into higher level management
layers, by providing a stable command line interface and monitor API.
It is commonly invoked indirectly via the libvirt library when using
open source applications such as oVirt, OpenStack and virt-manager.

QEMU as a whole is released under the GNU General Public License,
version 2. For full licensing details, consult the LICENSE file.


Building
========

QEMU is multi-platform software intended to be buildable on all modern
Linux platforms, OS-X, Win32 (via the Mingw64 toolchain) and a variety
of other UNIX targets. The simple steps to build QEMU are:

  mkdir build
  cd build
  ../configure
  make

Additional information can also be found online via the QEMU website:

  http://qemu-project.org/Hosts/Linux
  http://qemu-project.org/Hosts/Mac
  http://qemu-project.org/Hosts/W32


Submitting patches
==================

The QEMU source code is maintained under the GIT version control system.

   git clone git://git.qemu-project.org/qemu.git

When submitting patches, the preferred approach is to use 'git
format-patch' and/or 'git send-email' to format & send the mail to the
qemu-devel@nongnu.org mailing list. All patches submitted must contain
a 'Signed-off-by' line from the author. Patches should follow the
guidelines set out in the HACKING and CODING_STYLE files.

Additional information on submitting patches can be found online via
the QEMU website

  http://qemu-project.org/Contribute/SubmitAPatch
  http://qemu-project.org/Contribute/TrivialPatches


Bug reporting
=============

The QEMU project uses Launchpad as its primary upstream bug tracker. Bugs
found when running code built from QEMU git or upstream released sources
should be reported via:

  https://bugs.launchpad.net/qemu/

If using QEMU via an operating system vendor pre-built binary package, it
is preferable to report bugs to the vendor's own bug tracker first. If
the bug is also known to affect latest upstream code, it can also be
reported via launchpad.

For additional information on bug reporting consult:

  http://qemu-project.org/Contribute/ReportABug


Contact
=======

The QEMU community can be contacted in a number of ways, with the two
main methods being email and IRC

 - qemu-devel@nongnu.org
   http://lists.nongnu.org/mailman/listinfo/qemu-devel
 - #qemu on irc.oftc.net

Information on additional methods of contacting the community can be
found online via the QEMU website:

  http://qemu-project.org/Contribute/StartHere

-- End