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0935700f85
qemu-e2k/tests
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Daniel P. Berrange 0935700f85 char: allow passing pre-opened socket file descriptor at startup 
When starting QEMU management apps will usually setup a monitor socket, and
then open it immediately after startup. If not using QEMU's own -daemonize
arg, this process can be troublesome to handle correctly. The mgmt app will
need to repeatedly call connect() until it succeeds, because it does not
know when QEMU has created the listener socket. If can't retry connect()
forever though, because an error might have caused QEMU to exit before it
even creates the monitor.

The obvious way to fix this kind of problem is to just pass in a pre-opened
socket file descriptor for the QEMU monitor to listen on. The management
app can now immediately call connect() just once. If connect() fails it
knows that QEMU has exited with an error.

The SocketAddress(Legacy) structs allow for FD passing via the monitor, and
now via inherited file descriptors from the process that spawned QEMU. The
final missing piece is adding a 'fd' parameter in the socket chardev
options.

This allows both HMP usage, pass any FD number with SCM_RIGHTS, then
running HMP commands:

   getfd myfd
   chardev-add socket,fd=myfd

Note that numeric FDs cannot be referenced directly in HMP, only named FDs.

And also CLI usage, by leak FD 3 from parent by clearing O_CLOEXEC, then
spawning QEMU with

  -chardev socket,fd=3,id=mon
  -mon chardev=mon,mode=control

Note that named FDs cannot be referenced in CLI args, only numeric FDs.

We do not wire this up in the legacy chardev syntax, so you cannot use FD
passing with '-qmp', you must use the modern '-mon' + '-chardev' pair.

When passing pre-opened FDs there is a restriction on use of TLS encryption.
It can be used on a server socket chardev, but cannot be used for a client
socket chardev. This is because when validating a server's certificate, the
client needs to have a hostname available to match against the certificate
identity.

An illustrative example of usage is:

  #!/usr/bin/perl

  use IO::Socket::UNIX;
  use Fcntl;

  unlink "/tmp/qmp";
  my $srv = IO::Socket::UNIX->new(
    Type => SOCK_STREAM(),
    Local => "/tmp/qmp",
    Listen => 1,
  );

  my $flags = fcntl $srv, F_GETFD, 0;
  fcntl $srv, F_SETFD, $flags & ~FD_CLOEXEC;

  my $fd = $srv->fileno();

  exec "qemu-system-x86_64", \
      "-chardev", "socket,fd=$fd,server,nowait,id=mon", \
      "-mon", "chardev=mon,mode=control";

Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2018-03-13 18:06:06 +00:00
..
acpi-test-data acpi-test: update FADT 2018-02-13 18:25:48 +02:00
data test-qga: add test for guest-get-osinfo 2017-07-18 05:49:01 -05:00
decode scripts: Add decodetree.py 2018-02-22 15:44:07 -08:00
docker tests: make docker-test-debug@fedora run sanitizers 2018-03-13 01:19:56 +08:00
guest-debug
image-fuzzer tests: Use Python 2.6 "except E as ..." syntax 2016-02-08 17:29:54 +01:00
keys tests: Add a test key pair 2017-09-22 10:46:25 +08:00
libqos tests/libqos: Check for valid dev pointer when looking for PCI devices 2018-03-05 09:03:17 +00:00
migration tests/migration: Add source to PC boot block 2018-02-14 10:26:21 +00:00
multiboot tests/multiboot: Fix whitespace failure 2017-08-11 13:23:19 +02:00
qapi-schema qapi: Record 'include' directives in intermediate representation 2018-03-02 13:14:10 -06:00
qemu-iotests qemu-iotests: fix 203 migration completion race 2018-03-09 15:40:07 +01:00
rocker tests: Avoid non-portable 'echo -ARG' 2017-07-11 17:45:00 +02:00
tcg maint: Fix macros with broken 'do/while(0); ' usage 2018-01-16 14:54:52 +01:00
vm docs: Add docs/devel/testing.rst 2018-02-08 09:23:07 +08:00
vmstate-static-checker-data
.gitignore sockets: move fd_is_socket() into common sockets code 2018-03-13 18:06:06 +00:00
ac97-test.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
acpi-utils.c tests: Move reusable ACPI code into a utility file 2017-03-02 07:14:27 +02:00
acpi-utils.h maint: Fix macros with broken 'do/while(0); ' usage 2018-01-16 14:54:52 +01:00
ahci-test.c ahci-test: fix opts leak of skip tests 2018-03-06 14:01:27 +01:00
atomic_add-bench.c tests: add atomic_add-bench 2016-10-26 08:29:01 -07:00
benchmark-crypto-cipher.c tests: fix incorrect size_t format in benchmark-crypto 2017-09-04 10:45:19 +01:00
benchmark-crypto-hash.c tests: fix incorrect size_t format in benchmark-crypto 2017-09-04 10:45:19 +01:00
benchmark-crypto-hmac.c tests: fix incorrect size_t format in benchmark-crypto 2017-09-04 10:45:19 +01:00
bios-tables-test.c tests/boot-sector: Drop dependence on global_qtest 2018-02-14 11:43:41 +01:00
boot-order-test.c libqos: Use explicit QTestState for fw_cfg operations 2018-02-14 11:43:41 +01:00
boot-sector.c tests/boot-sector: Drop dependence on global_qtest 2018-02-14 11:43:41 +01:00
boot-sector.h tests/boot-sector: Drop dependence on global_qtest 2018-02-14 11:43:41 +01:00
boot-serial-test.c tests/boot-serial-test: Fix problem with timeout due to dropped characters 2018-02-16 10:15:48 +00:00
check-block.sh tests: allow to specify list of formats to test for check-block.sh 2016-09-23 13:36:09 +02:00
check-qdict.c qdict: Introduce qdict_rename_keys() 2018-03-09 15:17:47 +01:00
check-qjson.c Include qapi/qmp/qstring.h exactly where needed 2018-02-09 13:52:15 +01:00
check-qlist.c Include qapi/error.h exactly where needed 2018-02-09 13:50:17 +01:00
check-qlit.c Include qapi/qmp/qnum.h exactly where needed 2018-02-09 13:52:15 +01:00
check-qnull.c qapi/qnull: Add own header 2017-11-17 18:21:30 +01:00
check-qnum.c Include qapi/error.h exactly where needed 2018-02-09 13:50:17 +01:00
check-qobject.c Include qapi/qmp/qdict.h exactly where needed 2018-02-09 13:52:15 +01:00
check-qom-interface.c tests: fix check-qom-interface leaks 2016-09-08 17:57:32 +04:00
check-qom-proplist.c qapi: drop the sentinel in enum array 2017-09-04 13:09:13 +02:00
check-qstring.c tests: remove /{qnum, qlist, dict}/destroy test 2017-06-20 14:31:31 +02:00
cpu-plug-test.c Include qapi/qmp/qdict.h exactly where needed 2018-02-09 13:52:15 +01:00
crypto-tls-x509-helpers.c crypto: fix test cert generation to not use SHA1 algorithm 2017-09-04 10:45:19 +01:00
crypto-tls-x509-helpers.h clean-up: removed duplicate #includes 2016-10-28 18:17:24 +03:00
device-introspect-test.c Include qapi/qmp/qbool.h exactly where needed 2018-02-09 13:52:15 +01:00
display-vga-test.c qtest: add display-vga-test to ppc64 2017-01-31 10:10:13 +11:00
drive_del-test.c Include qapi/qmp/qdict.h exactly where needed 2018-02-09 13:52:15 +01:00
ds1338-test.c libqos: Use explicit QTestState for i2c operations 2018-02-14 11:43:41 +01:00
e1000-test.c tests: fix e1000-test leak 2017-03-01 11:51:28 +04:00
e1000e-test.c libqos: Use explicit QTestState for fw_cfg operations 2018-02-14 11:43:41 +01:00
eepro100-test.c tests: fix eepro100-test leak 2017-03-01 11:51:05 +04:00
endianness-test.c libqtest: Add qtest_[v]startf() 2017-10-20 13:32:10 +02:00
es1370-test.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
fdc-test.c fdc-test: Avoid deprecated 'change' command 2017-05-09 09:14:40 +02:00
fw_cfg-test.c libqos: Use explicit QTestState for fw_cfg operations 2018-02-14 11:43:41 +01:00
hd-geo-test.c tests: fix hd-geo-test leaks 2017-03-01 11:51:04 +04:00
i440fx-test.c libqos: Track QTestState with QPCIBus 2018-02-14 11:43:02 +01:00
i82801b11-test.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
ide-test.c libqos: Use explicit QTestState for fw_cfg operations 2018-02-14 11:43:41 +01:00
intel-hda-test.c coccinelle: Remove unnecessary variables for function return value 2016-06-20 16:38:13 +02:00
io-channel-helpers.c Include qapi/error.h exactly where needed 2018-02-09 13:50:17 +01:00
io-channel-helpers.h io: add QIOChannelSocket class 2015-12-18 12:18:31 +00:00
ioh3420-test.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
iothread.c aio: introduce aio_co_schedule and aio_co_wake 2017-02-21 11:14:07 +00:00
iothread.h aio: introduce aio_co_schedule and aio_co_wake 2017-02-21 11:14:07 +00:00
ipmi-bt-test.c libqtest: Add qtest_[v]startf() 2017-10-20 13:32:10 +02:00
ipmi-kcs-test.c tests: fix ipmi-kcs-test leak 2017-03-01 11:51:05 +04:00
ipoctal232-test.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
ivshmem-test.c libqos: Use explicit QTestState for remaining libqos operations 2018-02-14 11:43:41 +01:00
libqtest.c libqtest: Use qemu_strtoul() 2018-02-14 10:08:41 +01:00
libqtest.h Include qapi/qmp/qdict.h exactly where needed 2018-02-09 13:52:15 +01:00
m25p80-test.c libqtest: Add qtest_[v]startf() 2017-10-20 13:32:10 +02:00
m48t59-test.c tests/m48t59: Use the m48t59 test on ppc, too 2018-02-14 11:43:42 +01:00
Makefile.include sockets: move fd_is_socket() into common sockets code 2018-03-13 18:06:06 +00:00
megasas-test.c libqos: Use explicit QTestState for remaining libqos operations 2018-02-14 11:43:41 +01:00
migration-test.c tests: Silence migration-test 'bad' test 2018-03-09 17:39:25 +00:00
ne2000-test.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
numa-test.c Include qapi/qmp/qdict.h exactly where needed 2018-02-09 13:52:15 +01:00
nvme-test.c tests: Use null-co:// instead of /dev/null as the dummy image 2017-05-11 11:08:40 +02:00
pcnet-test.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
pkix_asn1_tab.c qtest: fix make check complaint in crypto module 2016-10-19 10:09:24 +01:00
pnv-xscom-test.c ppc/pnv: fix XSCOM core addressing on POWER9 2018-01-17 09:35:24 +11:00
prom-env-test.c libqtest: Add qtest_[v]startf() 2017-10-20 13:32:10 +02:00
ptimer-test-stubs.c ptimer-test: do not link to libqemustub.a/libqemuutil.a 2017-09-19 16:19:39 +02:00
ptimer-test.c Clean up includes 2018-02-09 05:05:11 +01:00
ptimer-test.h tests: ptimer: Change the copyright comment 2016-10-24 16:26:53 +01:00
pvpanic-test.c Include qapi/qmp/qdict.h exactly where needed 2018-02-09 13:52:15 +01:00
pxe-test.c tests/boot-sector: Drop dependence on global_qtest 2018-02-14 11:43:41 +01:00
q35-test.c libqos: Track QTestState with QPCIBus 2018-02-14 11:43:02 +01:00
qemu-iotests-quick.sh
qht-bench.c tcg: define CF_PARALLEL and use it for TB hashing along with CF_COUNT_MASK 2017-10-24 13:53:41 -07:00
qmp-test.c qapi: Empty out qapi-schema.json 2018-03-02 13:45:50 -06:00
qom-test.c Include qapi/qmp/qdict.h exactly where needed 2018-02-09 13:52:15 +01:00
rcutorture.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
rtas-test.c libqos: Use explicit QTestState for remaining libqos operations 2018-02-14 11:43:41 +01:00
rtc-test.c rtc-test: introduce more update tests 2017-08-01 17:27:33 +02:00
rtl8139-test.c libqos: Track QTestState with QPCIBus 2018-02-14 11:43:02 +01:00
sdhci-test.c sdhci-test: fix leaks 2018-03-06 14:01:27 +01:00
socket-helpers.c sockets: strengthen test suite IP protocol availability checks 2018-03-13 18:06:06 +00:00
socket-helpers.h sockets: strengthen test suite IP protocol availability checks 2018-03-13 18:06:06 +00:00
spapr-phb-test.c spapr: Improved placement of PCI host bridges in guest memory map 2016-10-16 12:04:15 +11:00
tco-test.c libqos: Track QTestState with QPCIBus 2018-02-14 11:43:02 +01:00
test-aio-multithread.c Include qapi/error.h exactly where needed 2018-02-09 13:50:17 +01:00
test-aio.c cpus: define QEMUTimerListNotifyCB for QEMU system emulation 2017-03-14 13:28:29 +01:00
test-arm-mptimer.c tests: Add tests for the ARM MPTimer 2016-10-24 16:26:54 +01:00
test-base64.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
test-bdrv-drain.c test-bdrv-drain: Test graph changes in drained section 2017-12-22 15:05:32 +01:00
test-bitcnt.c tests: New test-bitcnt 2017-01-10 08:49:59 -08:00
test-bitops.c bitops.h: Implement half-shuffle and half-unshuffle ops 2016-06-17 15:23:51 +01:00
test-block-backend.c block: test blk_aio_flush() with blk->root == NULL 2018-03-02 18:39:07 +01:00
test-blockjob-txn.c blockjob: remove clock argument from block_job_sleep_ns 2017-11-29 15:11:02 +01:00
test-blockjob.c blockjob: introduce block_job_early_fail 2017-05-24 16:38:51 -04:00
test-bufferiszero.c cutils: Add test for buffer_is_zero 2016-09-13 19:13:32 +02:00
test-char.c char: allow passing pre-opened socket file descriptor at startup 2018-03-13 18:06:06 +00:00
test-clone-visitor.c Eliminate qapi/qmp/types.h 2018-02-09 13:52:15 +01:00
test-coroutine.c lockable: add QemuLockable 2018-02-08 09:22:03 +08:00
test-crypto-afsplit.c include/qemu/osdep.h: Don't include qapi/error.h 2016-03-22 22:20:15 +01:00
test-crypto-block.c tests: Run the luks tests in test-crypto-block only if encryption is available 2017-11-08 11:03:46 +00:00
test-crypto-cipher.c crypto: add 3des-ede support when using libgcrypt/nettle 2016-12-21 14:26:26 +00:00
test-crypto-hash.c crypto: fix initialization of crypto in tests 2016-10-19 10:23:55 +01:00
test-crypto-hmac.c crypto: add HMAC algorithms testcases 2016-12-22 09:24:59 +00:00
test-crypto-ivgen.c include/qemu/osdep.h: Don't include qapi/error.h 2016-03-22 22:20:15 +01:00
test-crypto-pbkdf.c crypto: support more hash algorithms for pbkdf 2016-09-19 16:30:45 +01:00
test-crypto-secret.c crypto: remove temp files on completion of secrets test 2016-06-13 12:41:17 +01:00
test-crypto-tlscredsx509.c include/qemu/osdep.h: Don't include qapi/error.h 2016-03-22 22:20:15 +01:00
test-crypto-tlssession.c include/qemu/osdep.h: Don't include qapi/error.h 2016-03-22 22:20:15 +01:00
test-crypto-xts.c crypto: rename OUT to out in xts test to avoid clash on MinGW 2016-07-04 10:46:59 +01:00
test-cutils.c cutils: add qemu_strtoi & qemu_strtoui parsers for int/unsigned int types 2018-03-13 18:06:05 +00:00
test-filter-mirror.c libqtest: Add qtest_[v]startf() 2017-10-20 13:32:10 +02:00
test-filter-redirector.c tests/test-filter-redirector: move close() 2018-02-07 14:09:25 +01:00
test-hbitmap.c tests/hbitmap: use ARRAY_SIZE macro 2018-02-10 10:44:30 +03:00
test-hmp.c net: Remove the deprecated 'host_net_add' and 'host_net_remove' HMP commands 2018-03-05 10:30:15 +08:00
test-int128.c int128: Use __int128 if available 2016-10-26 08:29:00 -07:00
test-io-channel-buffer.c tests: Clean up includes 2016-02-16 14:29:27 +00:00
test-io-channel-command.c tests: fix leaks in test-io-channel-command 2017-03-01 00:09:28 +04:00
test-io-channel-file.c io: Fix QIOChannelFile when creating and opening read-write 2018-02-15 16:54:57 +00:00
test-io-channel-socket.c sockets: pull code for testing IP availability out of specific test 2018-03-13 18:06:06 +00:00
test-io-channel-tls.c qio: non-default context for TLS handshake 2018-03-06 10:19:07 +00:00
test-io-task.c qio: non-default context for threaded qtask 2018-03-06 10:19:05 +00:00
test-iov.c tests: Use real size for iov tests 2017-09-05 22:34:40 +02:00
test-keyval.c Include qapi/qmp/qdict.h exactly where needed 2018-02-09 13:52:15 +01:00
test-logging.c test-logging: don't hard-code paths in /tmp 2016-08-19 12:44:11 +01:00
test-mul64.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
test-netfilter.c Include qapi/qmp/qdict.h exactly where needed 2018-02-09 13:52:15 +01:00
test-opts-visitor.c qapi: Fix QemuOpts visitor regression on unvisited input 2017-03-22 19:24:34 +01:00
test-qapi-util.c Drop superfluous includes of qapi-types.h and test-qapi-types.h 2018-02-09 05:05:11 +01:00
test-qdev-global-props.c test-qdev-global-props: Test global property ordering 2017-07-17 15:41:30 -03:00
test-qdist.c qdist: return "(empty)" instead of NULL when printing an empty dist 2016-08-03 18:44:56 +02:00
test-qemu-opts.c test-qemu-opts: Test qemu_opts_to_qdict_filtered() 2018-03-09 15:17:47 +01:00
test-qga.c Include qapi/qmp/qdict.h exactly where needed 2018-02-09 13:52:15 +01:00
test-qht-par.c clean-includes: run it once more 2016-06-16 18:39:03 +02:00
test-qht.c test-qht: perform lookups under rcu_read_lock 2016-10-06 18:04:13 +02:00
test-qmp-cmds.c qapi: Move qapi-schema.json to qapi/, rename generated files 2018-03-02 13:45:57 -06:00
test-qmp-event.c qapi: Move qapi-schema.json to qapi/, rename generated files 2018-03-02 13:45:57 -06:00
test-qobject-input-visitor.c qapi: Move qapi-schema.json to qapi/, rename generated files 2018-03-02 13:45:57 -06:00
test-qobject-output-visitor.c tests/qapi: use QEMU_IS_ALIGNED macro 2018-02-10 10:44:58 +03:00
test-rcu-list.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
test-replication.c Move include qemu/option.h from qemu-common.h to actual users 2018-02-09 13:52:16 +01:00
test-shift128.c host-utils: Implement unsigned quadword left/right shift and unit tests 2017-01-31 10:10:14 +11:00
test-string-input-visitor.c Eliminate qapi/qmp/types.h 2018-02-09 13:52:15 +01:00
test-string-output-visitor.c tests/qapi: use ARRAY_SIZE macro 2018-02-10 10:45:14 +03:00
test-thread-pool.c test-thread-pool: use generic AioContext infrastructure 2017-02-21 11:14:07 +00:00
test-throttle.c block: convert ThrottleGroup to object with QOM 2017-09-05 18:12:21 +02:00
test-timed-average.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
test-util-sockets.c sockets: allow SocketAddress 'fd' to reference numeric file descriptors 2018-03-13 18:06:06 +00:00
test-uuid.c util: add is_equal to UUID API 2017-12-20 22:01:24 +08:00
test-visitor-serialization.c qapi: Empty out qapi-schema.json 2018-03-02 13:45:50 -06:00
test-vmstate.c migration: Route more error paths 2017-09-27 11:44:18 +01:00
test-write-threshold.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
test-x86-cpuid-compat.c Include qapi/qmp/qlist.h exactly where needed 2018-02-09 13:52:15 +01:00
test-x86-cpuid.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
test-xbzrle.c migration: Create migration/xbzrle.h 2017-05-18 18:04:54 +02:00
tmp105-test.c libqos: Use explicit QTestState for i2c operations 2018-02-14 11:43:41 +01:00
tpci200-test.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
tpm-crb-test.c tests: Move common TPM test code into tpm-emu.c 2018-02-21 07:24:50 -05:00
tpm-emu.c tests: add test for TPM TIS device 2018-02-21 07:24:50 -05:00
tpm-emu.h tests: Move common TPM test code into tpm-emu.c 2018-02-21 07:24:50 -05:00
tpm-tis-test.c tests: add test for TPM TIS device 2018-02-21 07:24:50 -05:00
usb-hcd-ehci-test.c libqos: Track QTestState with QPCIBus 2018-02-14 11:43:02 +01:00
usb-hcd-ohci-test.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
usb-hcd-uhci-test.c libqos: Use explicit QTestState for remaining libqos operations 2018-02-14 11:43:41 +01:00
usb-hcd-xhci-test.c tests: Introduce generic device hot-plug/hot-unplug functions 2017-09-15 09:05:18 +02:00
vhost-user-bridge.c tests: Avoid 'do/while(false); ' in vhost-user-bridge 2018-01-16 14:54:52 +01:00
vhost-user-test.c libqos: Use explicit QTestState for fw_cfg operations 2018-02-14 11:43:41 +01:00
virtio-9p-test.c libqos: Use explicit QTestState for remaining libqos operations 2018-02-14 11:43:41 +01:00
virtio-balloon-test.c tests: Enable the very simple virtio tests on s390x, too 2017-10-20 13:32:10 +02:00
virtio-blk-test.c libqos: Use explicit QTestState for remaining libqos operations 2018-02-14 11:43:41 +01:00
virtio-console-test.c tests: Enable the very simple virtio tests on s390x, too 2017-10-20 13:32:10 +02:00
virtio-net-test.c libqos: Use explicit QTestState for remaining libqos operations 2018-02-14 11:43:41 +01:00
virtio-rng-test.c tests: enable virtio tests on SPAPR 2016-10-28 09:36:58 +11:00
virtio-scsi-test.c libqos: Use explicit QTestState for remaining libqos operations 2018-02-14 11:43:41 +01:00
virtio-serial-test.c tests: Enable the very simple virtio tests on s390x, too 2017-10-20 13:32:10 +02:00
vmgenid-test.c tests/boot-sector: Drop dependence on global_qtest 2018-02-14 11:43:41 +01:00
vmxnet3-test.c tests: Remove unnecessary glib.h includes 2016-06-07 18:19:24 +03:00
wdt_ib700-test.c wdt_ib700-test: Drop dependence on global_qtest 2018-02-14 11:43:42 +01:00