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Juraj Marcin 1bd4237cb1 util/qemu-sockets: Introduce inet socket options controlling TCP keep-alive 
With the default TCP stack configuration, it could be even 2 hours
before the connection times out due to the other side not being
reachable. However, in some cases, the application needs to be aware of
a connection issue much sooner.

This is the case, for example, for postcopy live migration. If there is
no traffic from the migration destination guest (server-side) to the
migration source guest (client-side), the destination keeps waiting for
pages indefinitely and does not switch to the postcopy-paused state.
This can happen, for example, if the destination QEMU instance is
started with the '-S' command line option and the machine is not started
yet, or if the machine is idle and produces no new page faults for
not-yet-migrated pages.

This patch introduces new inet socket parameters that control count,
idle period, and interval of TCP keep-alive packets before the
connection is considered broken. These parameters are available on
systems where the respective TCP socket options are defined, that
includes Linux, Windows, macOS, but not OpenBSD. Additionally, macOS
defines TCP_KEEPIDLE as TCP_KEEPALIVE instead, so the patch supplies its
own definition.

The default value for all is 0, which means the system configuration is
used.

Signed-off-by: Juraj Marcin <jmarcin@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
2025-05-22 11:24:41 +01:00
..
check-block-qdict.c qapi: Move include/qapi/qmp/ to include/qobject/ 2025-02-10 15:33:16 +01:00
check-qdict.c qapi: Move include/qapi/qmp/ to include/qobject/ 2025-02-10 15:33:16 +01:00
check-qjson.c qapi: Move include/qapi/qmp/ to include/qobject/ 2025-02-10 15:33:16 +01:00
check-qlist.c qapi: Move include/qapi/qmp/ to include/qobject/ 2025-02-10 15:33:16 +01:00
check-qlit.c qapi: Move include/qapi/qmp/ to include/qobject/ 2025-02-10 15:33:16 +01:00
check-qnull.c qapi: Move include/qapi/qmp/ to include/qobject/ 2025-02-10 15:33:16 +01:00
check-qnum.c qapi: Move include/qapi/qmp/ to include/qobject/ 2025-02-10 15:33:16 +01:00
check-qobject.c qapi: Move include/qapi/qmp/ to include/qobject/ 2025-02-10 15:33:16 +01:00
check-qom-interface.c qom: Make InterfaceInfo[] uses const 2025-04-25 17:00:41 +02:00
check-qom-proplist.c qom: Make InterfaceInfo[] uses const 2025-04-25 17:00:41 +02:00
check-qstring.c qapi: Move include/qapi/qmp/ to include/qobject/ 2025-02-10 15:33:16 +01:00
crypto-tls-psk-helpers.c crypto: Remove 'crypto-tls-x509-helpers.h' from crypto-tls-psk-helpers.c 2024-07-24 10:39:10 +01:00
crypto-tls-psk-helpers.h tests: add migration tests of TLS with PSK credentials 2022-05-16 11:46:04 +01:00
crypto-tls-x509-helpers.c tests/unit/crypto-tls-x509-helpers: deinit privkey in test_tls_cleanup 2024-09-03 16:24:34 -03:00
crypto-tls-x509-helpers.h tests/qtest/migration-test: Free QCRyptoTLSTestCertReq objects 2024-09-03 16:24:34 -03:00
io-channel-helpers.c tests/channel-helper: set blocking in main thread 2022-10-12 19:22:01 +04:00
io-channel-helpers.h tests: Move unit tests into a separate directory 2021-03-12 15:46:30 +01:00
iothread.c async: the main AioContext is only "current" if under the BQL 2021-06-18 10:59:52 -05:00
iothread.h tests: Move unit tests into a separate directory 2021-03-12 15:46:30 +01:00
meson.build tests/unit: remove block layer code from test-nested-aio-poll 2024-10-02 12:58:46 +02:00
pkix_asn1_tab.c.inc crypto: Restrict pkix_asn1_tab[] to crypto-tls-x509-helpers.c 2024-07-24 10:39:10 +01:00
ptimer-test-stubs.c async: Add an optional reentrancy guard to the BH API 2023-04-28 11:31:07 +02:00
ptimer-test.c hw/core/ptimer: fix timer zero period condition for freq > 1GHz 2024-08-12 11:40:16 +01:00
ptimer-test.h tests: Move unit tests into a separate directory 2021-03-12 15:46:30 +01:00
rcutorture.c Updated the FSF address to <https://www.gnu.org/licenses/> 2023-02-27 09:15:39 +01:00
socket-helpers.c cleanup: Drop pointless return at end of function 2025-04-24 09:33:42 +02:00
socket-helpers.h tests/unit: Update test-io-channel-socket.c for Windows 2022-09-02 15:54:47 +04:00
test-aio-multithread.c atomics: eliminate mb_read/mb_set 2023-06-06 09:42:14 +02:00
test-aio.c tests: remove aio_context_acquire() tests 2023-12-21 22:49:27 +01:00
test-authz-list.c tests: Move unit tests into a separate directory 2021-03-12 15:46:30 +01:00
test-authz-listfile.c tests: Move unit tests into a separate directory 2021-03-12 15:46:30 +01:00
test-authz-pam.c tests: Move unit tests into a separate directory 2021-03-12 15:46:30 +01:00
test-authz-simple.c tests: Move unit tests into a separate directory 2021-03-12 15:46:30 +01:00
test-base64.c tests: Move unit tests into a separate directory 2021-03-12 15:46:30 +01:00
test-bdrv-drain.c test-bdrv-drain: Fix data races 2025-04-08 15:00:01 +02:00
test-bdrv-graph-mod.c include: Rename sysemu/ -> system/ 2024-12-20 17:44:56 +01:00
test-bitcnt.c tests: Move unit tests into a separate directory 2021-03-12 15:46:30 +01:00
test-bitmap.c tests: Move unit tests into a separate directory 2021-03-12 15:46:30 +01:00
test-bitops.c tests: Move unit tests into a separate directory 2021-03-12 15:46:30 +01:00
test-block-backend.c include: Rename sysemu/ -> system/ 2024-12-20 17:44:56 +01:00
test-block-iothread.c mirror: Drop redundant zero_target parameter 2025-05-14 20:10:12 -05:00
test-blockjob-txn.c qapi: Move include/qapi/qmp/ to include/qobject/ 2025-02-10 15:33:16 +01:00
test-blockjob.c qapi: Move include/qapi/qmp/ to include/qobject/ 2025-02-10 15:33:16 +01:00
test-bufferiszero.c tests: Move unit tests into a separate directory 2021-03-12 15:46:30 +01:00
test-char.c qapi: Move include/qapi/qmp/ to include/qobject/ 2025-02-10 15:33:16 +01:00
test-clone-visitor.c Remove qemu-common.h include from most units 2022-04-06 14:31:55 +02:00
test-coroutine.c tests/coroutine: Clean up global variable shadowing 2023-10-27 09:39:08 +02:00
test-crypto-afsplit.c qapi/crypto: Rename QCryptoHashAlgorithm to *Algo, and drop prefix 2024-09-10 14:02:16 +02:00
test-crypto-akcipher.c qapi/crypto: Rename QCryptoRSAPaddingAlgorithm to *Algo, and drop prefix 2024-09-10 14:03:30 +02:00
test-crypto-block.c tests: skip legacy qcow2 encryption test if AES is not available 2025-05-21 19:36:43 +01:00
test-crypto-cipher.c tests: fix skipping cipher tests when AES is not available 2025-05-21 19:36:43 +01:00
test-crypto-der.c crypto: Support DER encodings 2022-11-02 06:56:32 -04:00
test-crypto-hash.c crypto: Introduce SM3 hash hmac pbkdf algorithm 2024-11-05 18:37:18 +00:00
test-crypto-hmac.c crypto: Introduce SM3 hash hmac pbkdf algorithm 2024-11-05 18:37:18 +00:00
test-crypto-ivgen.c qapi/crypto: Rename QCryptoIVGenAlgorithm to *Algo, and drop prefix 2024-09-10 14:03:30 +02:00
test-crypto-pbkdf.c crypto: Introduce SM3 hash hmac pbkdf algorithm 2024-11-05 18:37:18 +00:00
test-crypto-secret.c tests: skip encrypted secret tests if AES is not available 2025-05-21 19:36:43 +01:00
test-crypto-tlscredsx509.c tests: Use g_mkdir_with_parents() 2022-08-25 15:24:09 +02:00
test-crypto-tlssession.c crypto: Remove qcrypto_tls_session_get_handshake_status 2025-02-14 15:19:03 -03:00
test-crypto-xts.c tests: Move unit tests into a separate directory 2021-03-12 15:46:30 +01:00
test-cutils.c cutils: Improve qemu_strtosz handling of fractions 2023-06-02 12:29:27 -05:00
test-div128.c host-utils: add unit tests for divu128/divs128 2021-10-27 17:10:00 -07:00
test-error-report.c error: add global &error_warn destination 2023-03-13 15:23:37 +04:00
test-fifo.c tests/unit: Comment FIFO8 tests 2024-09-13 20:11:13 +02:00
test-forward-visitor.c qapi: Move include/qapi/qmp/ to include/qobject/ 2025-02-10 15:33:16 +01:00
test-hbitmap.c Use g_new() & friends where that makes obvious sense 2022-03-21 15:44:44 +01:00
test-image-locking.c qapi: Move include/qapi/qmp/ to include/qobject/ 2025-02-10 15:33:16 +01:00
test-int128.c qemu/int128: add int128_urshift 2022-04-20 18:00:30 -03:00
test-interval-tree.c util: Add interval-tree.c 2022-12-20 17:09:41 -08:00
test-io-channel-buffer.c tests: Move unit tests into a separate directory 2021-03-12 15:46:30 +01:00
test-io-channel-command.c tests: fix path separator, use g_build_filename() 2023-03-13 15:39:31 +04:00
test-io-channel-file.c tests: replace pipe() with g_unix_open_pipe(CLOEXEC) 2022-05-03 15:46:08 +04:00
test-io-channel-null.c io: add a QIOChannelNull equivalent to /dev/null 2022-06-22 18:11:21 +01:00
test-io-channel-socket.c tests/unit: Add a assert for test_io_channel_unix_listen_cleanup 2024-10-10 13:41:45 +01:00
test-io-channel-tls.c Call qemu_socketpair() instead of socketpair() when possible 2023-01-16 17:42:17 +01:00
test-io-task.c tests/unit/test-io-task: Rename "qemu:dummy" to avoid colon in the name 2023-12-20 10:29:23 +01:00
test-iov.c tests/unit/test-iov: Fix timeout problem on NetBSD and OpenBSD 2024-01-23 15:25:45 +01:00
test-keyval.c qapi: Move include/qapi/qmp/ to include/qobject/ 2025-02-10 15:33:16 +01:00
test-logging.c util/log: Remove qemu_log_close 2022-04-20 10:51:11 -07:00
test-mul64.c tests: Move unit tests into a separate directory 2021-03-12 15:46:30 +01:00
test-nested-aio-poll.c tests/unit: Remove debug statements in test-nested-aio-poll.c 2024-04-25 15:15:25 +02:00
test-opts-visitor.c tests: Move unit tests into a separate directory 2021-03-12 15:46:30 +01:00
test-qapi-util.c tests: Move unit tests into a separate directory 2021-03-12 15:46:30 +01:00
test-qdev-global-props.c qom: Have class_init() take a const data argument 2025-04-25 17:00:41 +02:00
test-qdist.c tests: Move unit tests into a separate directory 2021-03-12 15:46:30 +01:00
test-qemu-opts.c qapi: Move include/qapi/qmp/ to include/qobject/ 2025-02-10 15:33:16 +01:00
test-qga.c qapi: Move include/qapi/qmp/ to include/qobject/ 2025-02-10 15:33:16 +01:00
test-qgraph.c cleanup: Drop pointless return at end of function 2025-04-24 09:33:42 +02:00
test-qht.c tests: Move unit tests into a separate directory 2021-03-12 15:46:30 +01:00
test-qmp-cmds.c qapi: Move include/qapi/qmp/ to include/qobject/ 2025-02-10 15:33:16 +01:00
test-qmp-event.c qapi: Move include/qapi/qmp/ to include/qobject/ 2025-02-10 15:33:16 +01:00
test-qobject-input-visitor.c qapi: Move include/qapi/qmp/ to include/qobject/ 2025-02-10 15:33:16 +01:00
test-qobject-output-visitor.c qapi: Move include/qapi/qmp/ to include/qobject/ 2025-02-10 15:33:16 +01:00
test-qtree.c util: import GTree as QTree 2023-03-28 15:23:10 -07:00
test-rcu-list.c replace TABs with spaces 2023-03-20 12:43:50 +01:00
test-rcu-simpleq.c tests: Move unit tests into a separate directory 2021-03-12 15:46:30 +01:00
test-rcu-slist.c tests: Move unit tests into a separate directory 2021-03-12 15:46:30 +01:00
test-rcu-tailq.c tests: Move unit tests into a separate directory 2021-03-12 15:46:30 +01:00
test-replication.c qapi: Move include/qapi/qmp/ to include/qobject/ 2025-02-10 15:33:16 +01:00
test-resv-mem.c include/system: Move exec/memory.h to system/memory.h 2025-04-23 14:08:21 -07:00
test-seccomp.c include: Rename sysemu/ -> system/ 2024-12-20 17:44:56 +01:00
test-shift128.c tests: Move unit tests into a separate directory 2021-03-12 15:46:30 +01:00
test-smp-parse.c qom: Have class_init() take a const data argument 2025-04-25 17:00:41 +02:00
test-string-input-visitor.c Remove qemu-common.h include from most units 2022-04-06 14:31:55 +02:00
test-string-output-visitor.c Remove qemu-common.h include from most units 2022-04-06 14:31:55 +02:00
test-thread-pool.c thread-pool: Remove thread_pool_submit() function 2025-03-06 06:47:33 +01:00
test-throttle.c include: Rename sysemu/ -> system/ 2024-12-20 17:44:56 +01:00
test-timed-average.c include: Rename sysemu/ -> system/ 2024-12-20 17:44:56 +01:00
test-util-filemonitor.c test-util-filemonitor: Adapt to the FreeBSD inotify rename semantics 2024-02-06 10:27:50 +01:00
test-util-sockets.c util/qemu-sockets: Introduce inet socket options controlling TCP keep-alive 2025-05-22 11:24:41 +01:00
test-uuid.c util/uuid: Add UUID_STR_LEN definition 2023-11-03 09:20:31 +01:00
test-virtio-dmabuf.c hw/display: introduce virtio-dmabuf 2023-10-04 18:15:06 -04:00
test-visitor-serialization.c qapi: Move include/qapi/qmp/ to include/qobject/ 2025-02-10 15:33:16 +01:00
test-vmstate.c migration: remove migration.h references 2024-03-11 16:28:59 -04:00
test-write-threshold.c write-threshold: deal with includes 2021-05-14 16:14:10 +02:00
test-x86-topo.c tests: Add test case of APIC ID for module level parsing 2024-05-22 19:43:29 +02:00
test-xbzrle.c migration/xbzrle: Use i386 host/cpuinfo.h 2023-05-23 16:51:18 -07:00
test-xs-node.c tests/unit: replace assert(0) with g_assert_not_reached() 2024-09-17 10:50:39 +02:00
test-yank.c include: Rename sysemu/ -> system/ 2024-12-20 17:44:56 +01:00