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
..
aio-posix.c	aio-posix: Adjust polling time also for new handlers	2025-03-13 17:57:23 +01:00
aio-posix.h	aio-posix: Separate AioPolledEvent per AioHandler	2025-03-13 17:57:23 +01:00
aio-wait.c	aio-wait: avoid AioContext lock in aio_wait_bh_oneshot()	2023-05-10 14:15:13 +02:00
aio-win32.c	include: Move QemuLockCnt APIs to their own header	2024-10-15 15:16:17 +01:00
aiocb.c	block: move AioContext, QEMUTimer, main-loop to libqemuutil	2017-02-21 11:14:07 +00:00
async.c	include/exec: Split out icount.h	2025-04-23 14:08:44 -07:00
atomic64.c	osdep: Move memalign-related functions to their own header	2022-03-07 13:16:49 +00:00
base64.c	nomaintainer: Fix Lesser GPL version number	2020-11-15 17:04:40 +01:00
bitmap.c	migration: Use non-atomic ops for clear log bitmap	2022-11-21 11:58:10 +01:00
bitops.c	replace TABs with spaces	2023-03-20 12:43:50 +01:00
block-helpers.c	block: Adjust check_block_size() signature	2024-10-18 15:03:35 +02:00
block-helpers.h	block: Adjust check_block_size() signature	2024-10-18 15:03:35 +02:00
buffer.c	nomaintainer: Fix Lesser GPL version number	2020-11-15 17:04:40 +01:00
bufferiszero.c	util/bufferiszero: Split out host include files	2024-06-19 12:47:11 -07:00
cacheflush.c	util/cacheflush.c: Update cache flushing mechanism for Emscripten	2025-05-06 16:02:04 +02:00
chardev_open.c	util/char_dev: Add open_cdev()	2023-12-19 19:03:38 +01:00
compatfd.c	util: replace pipe()+cloexec with g_unix_open_pipe()	2022-05-03 15:18:14 +04:00
coroutine-sigaltstack.c	osdep: set _FORTIFY_SOURCE=2 when optimization is enabled	2023-10-04 09:52:06 -04:00
coroutine-ucontext.c	coroutine-ucontext: Save fake stack for pooled coroutine	2024-01-22 11:00:12 -05:00
coroutine-wasm.c	util: Add coroutine backend for emscripten	2025-05-06 16:02:04 +02:00
coroutine-windows.c	build: move coroutine backend selection to meson	2023-05-18 08:53:52 +02:00
cpuinfo-aarch64.c	util/cpuinfo: Make use of elf_aux_info(3) on OpenBSD	2024-07-30 07:59:23 +10:00
cpuinfo-i386.c	target/i386/hvf: fix handling of XSAVE-related CPUID bits	2024-10-31 18:28:32 +01:00
cpuinfo-loongarch.c	util/loongarch64: Detect LASX vector support	2024-06-19 10:55:12 -07:00
cpuinfo-ppc.c	util/cpuinfo: Make use of elf_aux_info(3) on OpenBSD	2024-07-30 07:59:23 +10:00
cpuinfo-riscv.c	util/cpuinfo-riscv: Detect Zbs	2025-01-16 20:57:17 -08:00
crc-ccitt.c	util: Add CRC16 (CCITT) calculation routines	2021-01-24 20:10:54 +01:00
crc32c.c	igb: Implement Rx SCTP CSO	2023-05-23 15:20:15 +08:00
cutils.c	util/cutils: Remove unused qemu_get_exec_dir	2024-09-20 10:04:34 +03:00
dbus.c	util: add dbus helper unit	2020-01-06 18:41:32 +04:00
defer-call.c	util/defer-call: move defer_call() to util/	2023-10-31 15:41:42 +01:00
drm.c	util/drm: make portable by avoiding struct dirent d_type	2020-07-13 14:36:10 +01:00
envlist.c	envlist: Remove unused envlist_parse	2024-09-20 10:00:27 +03:00
error-report.c	Remove glib compatibility code that is not required anymore	2024-05-14 12:46:39 +02:00
error.c	util/error: Introduce warn_report_err_once()	2025-02-11 14:15:19 +01:00
event_notifier-posix.c	Replace qemu_pipe() with g_unix_open_pipe()	2022-05-03 15:17:56 +04:00
event_notifier-win32.c	Remove qemu-common.h include from most units	2022-04-06 14:31:55 +02:00
fdmon-epoll.c	include: Move QemuLockCnt APIs to their own header	2024-10-15 15:16:17 +01:00
fdmon-io_uring.c	remove unnecessary casts from uintptr_t	2024-01-18 10:43:51 +01:00
fdmon-poll.c	aio: remove aio_disable_external() API	2023-05-30 17:37:26 +02:00
fifo8.c	fifo8: introduce fifo8_peek() function	2024-09-13 20:11:13 +02:00
filemonitor-inotify.c	util/filemonitor-inotify.c: spelling fix: kenel	2023-11-15 12:06:05 +03:00
filemonitor-stub.c	nomaintainer: Fix Lesser GPL version number	2020-11-15 17:04:40 +01:00
getauxval.c	util/cpuinfo: Make use of elf_aux_info(3) on OpenBSD	2024-07-30 07:59:23 +10:00
guest-random.c	util/guest-random: Clean up global variable shadowing	2023-10-06 13:27:48 +02:00
hbitmap.c	qapi/crypto: Rename QCryptoHashAlgorithm to *Algo, and drop prefix	2024-09-10 14:02:16 +02:00
hexdump.c	hw/vmapple/aes: Introduce aes engine	2025-03-04 14:45:34 +01:00
host-utils.c	host-utils: Implemented signed 256-by-128 division	2022-06-20 08:38:58 -03:00
id.c	net: Use id_generate() in the network subsystem, too	2021-03-09 21:47:45 +01:00
int128.c	include/qemu/int128: Use Int128 structure for TCI	2023-02-04 06:19:42 -10:00
interval-tree.c	util/interval-tree: Check root for null in interval_tree_iter_first	2023-08-09 09:26:32 -07:00
iov.c	util/iov: Do not assert offset is in iov	2025-03-10 17:07:16 +08:00
iova-tree.c	vhost-iova-tree, svq: Implement GPA->IOVA & partial IOVA->HVA trees	2025-02-21 07:18:42 -05:00
keyval.c	qapi: Move include/qapi/qmp/ to include/qobject/	2025-02-10 15:33:16 +01:00
lockcnt.c	include: Move QemuLockCnt APIs to their own header	2024-10-15 15:16:17 +01:00
log.c	log: Add separate debug option for logging invalid memory accesses	2024-12-20 17:44:55 +01:00
main-loop.c	qom: Have class_init() take a const data argument	2025-04-25 17:00:41 +02:00
memalign.c	osdep: Move memalign-related functions to their own header	2022-03-07 13:16:49 +00:00
memfd.c	physmem: fd-based shared memory	2025-01-29 11:43:04 -03:00
meson.build	Pull request	2025-05-09 12:04:19 -04:00
mmap-alloc.c	util/mmap-alloc: qemu_fd_getfs()	2023-04-24 11:29:00 +02:00
module.c	overall: Remove unnecessary g_strdup_printf() calls	2025-02-14 08:49:06 +03:00
notify.c	notify: pass error to notifier with return	2024-02-28 11:31:28 +08:00
nvdimm-utils.c	Clean up includes	2020-12-10 17:16:44 +01:00
osdep.c	migration: Add direct-io parameter	2024-06-21 09:47:22 -03:00
oslib-posix.c	util: exclude mmap-alloc.c from compilation target on Emscripten	2025-05-06 16:02:04 +02:00
oslib-win32.c	backends/hostmem-shm: factor out allocation of "anonymous shared memory with an fd"	2025-01-29 11:43:03 -03:00
path.c	util/path: Do not cache all filenames at startup	2019-06-24 22:19:30 +02:00
qdist.c	util: spelling fixes	2023-08-31 19:47:43 +02:00
qemu-co-shared-resource.c	util/co-shared-resource: Remove unused co_try_get_from_shres	2024-09-30 10:53:18 +03:00
qemu-co-timeout.c	util: add qemu-co-timeout	2022-06-29 10:56:12 +03:00
qemu-config.c	qapi: Move include/qapi/qmp/ to include/qobject/	2025-02-10 15:33:16 +01:00
qemu-coroutine-io.c	aio: remove aio_disable_external() API	2023-05-30 17:37:26 +02:00
qemu-coroutine-lock.c	atomics: eliminate mb_read/mb_set	2023-06-06 09:42:14 +02:00
qemu-coroutine-sleep.c	coroutine: Clean up superfluous inclusion of qemu/coroutine.h	2023-01-19 10:18:28 +01:00
qemu-coroutine.c	util/coroutine: fix -Werror=maybe-uninitialized false-positive	2024-10-02 16:14:29 +04:00
qemu-option.c	qapi: Move include/qapi/qmp/ to include/qobject/	2025-02-10 15:33:16 +01:00
qemu-print.c	monitor: Use getter/setter functions for cur_mon	2020-10-09 07:08:19 +02:00
qemu-progress.c	include: move progress API to qemu-progress.h	2022-04-06 14:31:43 +02:00
qemu-sockets.c	util/qemu-sockets: Introduce inet socket options controlling TCP keep-alive	2025-05-22 11:24:41 +01:00
qemu-thread-common.h	Clean up includes	2018-12-20 10:29:08 +01:00
qemu-thread-posix.c	qemu/compiler: Absorb 'clang-tsa.h'	2025-03-06 14:21:25 +01:00
qemu-thread-win32.c	qemu-thread-win32: cleanup, fix, document QemuEvent	2023-03-07 12:38:40 +01:00
qemu-timer-common.c	semihosting: Implement SYS_ELAPSED and SYS_TICKFREQ	2021-01-18 10:05:06 +00:00
qemu-timer.c	include/exec: Split out icount.h	2025-04-23 14:08:44 -07:00
qht.c	cleanup: Drop pointless return at end of function	2025-04-24 09:33:42 +02:00
qsp.c	system/cpus: rename qemu_mutex_lock_iothread() to bql_lock()	2024-01-08 10:45:43 -05:00
qtree.c	tcg: use QTree instead of GTree	2023-03-28 15:23:10 -07:00
range.c	util/range.c: spelling fix: inbetween	2023-11-15 12:06:05 +03:00
rcu.c	Replace "iothread lock" with "BQL" in comments	2024-01-08 10:45:43 -05:00
readline.c	util/readline: Add C-u shortcut	2024-06-19 12:42:03 +02:00
reserved-region.c	util/reserved-region: Add new ReservedRegion helpers	2023-11-03 09:20:31 +01:00
s390x_pci_mmio.c	util: Add functions for s390x mmio read/write	2025-05-08 10:03:07 -04:00
selfmap.c	util/selfmap: Use dev_t and ino_t in MapInfo	2023-09-01 13:34:03 -07:00
stats64.c	stat64: Add stat64_set() operation	2023-04-27 16:39:43 +02:00
sys_membarrier.c	sys_membarrier: fix up include directives	2018-04-05 14:37:38 +02:00
systemd.c	systemd: Also clear LISTEN_FDNAMES during systemd socket activation	2023-05-03 14:00:08 -05:00
thread-context.c	qom: Make InterfaceInfo[] uses const	2025-04-25 17:00:41 +02:00
thread-pool.c	thread-pool: Implement generic (non-AIO) pool support	2025-03-06 06:47:33 +01:00
throttle.c	throttle: use THROTTLE_MAX/ARRAY_SIZE for hard code	2023-08-29 10:49:24 +02:00
timed-average.c	license: Simplify GPL-2.0-or-later license descriptions	2024-09-20 10:11:59 +03:00
trace-events	thread-pool: Rename AIO pool functions to *_aio() and data types to *Aio	2025-03-06 06:47:33 +01:00
trace.h	trace: switch position of headers to what Meson requires	2020-08-21 06:18:24 -04:00
transactions.c	transactions: Invoke clean() after everything else	2021-11-16 09:43:44 +01:00
unicode.c	json: Reject invalid UTF-8 sequences	2018-08-24 20:26:37 +02:00
userfaultfd.c	util/userfaultfd: Remove unused uffd_poll_events	2024-10-08 15:28:55 -04:00
uuid.c	util/uuid: Add UUID_STR_LEN definition	2023-11-03 09:20:31 +01:00
vfio-helpers.c	include/system: Move exec/memory.h to system/memory.h	2025-04-23 14:08:21 -07:00
vhost-user-server.c	vhost-user-server: do not set memory fd non-blocking	2024-07-02 09:27:56 -04:00
yank.c	qapi: Fix dangling references to docs/devel/qapi-code-gen.txt	2024-01-26 07:04:53 +01:00