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qemu/migration
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Peter Xu 99fab22350 migration/multifd: Make MultiFDSendData a struct 
The newly introduced device state buffer can be used for either storing
VFIO's read() raw data, but already also possible to store generic device
states.  After noticing that device states may not easily provide a max
buffer size (also the fact that RAM MultiFDPages_t after all also want to
have flexibility on managing offset[] array), it may not be a good idea to
stick with union on MultiFDSendData.. as it won't play well with such
flexibility.

Switch MultiFDSendData to a struct.

It won't consume a lot more space in reality, after all the real buffers
were already dynamically allocated, so it's so far only about the two
structs (pages, device_state) that will be duplicated, but they're small.

With this, we can remove the pretty hard to understand alloc size logic.
Because now we can allocate offset[] together with the SendData, and
properly free it when the SendData is freed.

[MSS: Make sure to clear possible device state payload before freeing
MultiFDSendData, remove placeholders for other patches not included]

Signed-off-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Maciej S. Szmigiero <maciej.szmigiero@oracle.com>
Acked-by: Fabiano Rosas <farosas@suse.de>
Link: https://lore.kernel.org/qemu-devel/7b02baba8e6ddb23ef7c349d312b9b631db09d7e.1741124640.git.maciej.szmigiero@oracle.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>
2025-03-06 06:47:33 +01:00
..
block-active.c migration/block-active: Remove global active flag 2025-02-06 14:26:51 +01:00
block-dirty-bitmap.c include: Rename sysemu/ -> system/ 2024-12-20 17:44:56 +01:00
channel-block.c io: follow coroutine AioContext in qio_channel_yield() 2023-09-07 20:32:11 -05:00
channel-block.h migration: introduce a QIOChannel impl for BlockDriverState VMState 2022-06-22 19:33:43 +01:00
channel.c migration: Fix hang after error in destination setup phase 2025-02-14 15:19:05 -03:00
channel.h migration: check magic value for deciding the mapping of channels 2023-02-06 19:22:57 +01:00
colo-failover.c migration/colo: Improve an x-colo-lost-heartbeat error message 2023-02-23 14:10:17 +01:00
colo-stubs.c migration/colo: make colo_incoming_co() return void 2024-05-22 17:34:31 -03:00
colo.c migration: Add MIG_CMD_SWITCHOVER_START and its load handler 2025-03-06 06:47:33 +01:00
cpr-transfer.c migration: cpr-transfer save and load 2025-01-29 11:43:05 -03:00
cpr.c migration: use parameters.mode in cpr_state_save 2025-02-14 15:19:06 -03:00
cpu-throttle.c include: Rename sysemu/ -> system/ 2024-12-20 17:44:56 +01:00
dirtyrate.c qapi: Move include/qapi/qmp/ to include/qobject/ 2025-02-10 15:33:16 +01:00
dirtyrate.h include: Rename sysemu/ -> system/ 2024-12-20 17:44:56 +01:00
exec.c migration: simplify exec migration functions 2024-03-04 07:12:40 +01:00
exec.h migration: convert exec backend to accept MigrateAddress. 2023-11-02 11:35:04 +01:00
fd.c migration: Allow pipes to keep working for fd migrations 2024-11-25 16:21:55 -05:00
fd.h migration: Revert mapped-ram multifd support to fd: URI 2024-03-22 12:12:08 -04:00
file.c migration/multifd: Pass in MultiFDPages_t to file_write_ramblock_iov 2024-09-03 16:24:35 -03:00
file.h migration/multifd: Pass in MultiFDPages_t to file_write_ramblock_iov 2024-09-03 16:24:35 -03:00
global_state.c include: Rename sysemu/ -> system/ 2024-12-20 17:44:56 +01:00
meson.build migration/multifd: Device state transfer support - send side 2025-03-06 06:47:33 +01:00
migration-hmp-cmds.c migration: Add MIG_CMD_SWITCHOVER_START and its load handler 2025-03-06 06:47:33 +01:00
migration-stats.c migration: migration_rate_limit_reset() don't need the QEMUFile 2023-10-31 08:44:33 +01:00
migration-stats.h migration: Remove transferred atomic counter 2023-10-31 08:44:33 +01:00
migration.c migration: Add thread pool of optional load threads 2025-03-06 06:47:33 +01:00
migration.h migration: Add thread pool of optional load threads 2025-03-06 06:47:33 +01:00
multifd-device-state.c migration/multifd: Make MultiFDSendData a struct 2025-03-06 06:47:33 +01:00
multifd-nocomp.c migration/multifd: Make MultiFDSendData a struct 2025-03-06 06:47:33 +01:00
multifd-qatzip.c multifd: bugfix for incorrect migration data with qatzip compression 2025-01-09 17:40:27 -03:00
multifd-qpl.c multifd: bugfix for incorrect migration data with QPL compression 2025-01-09 17:40:21 -03:00
multifd-uadk.c migration/multifd: Fix compile error caused by page_size usage 2025-01-09 17:37:50 -03:00
multifd-zero-page.c migration/multifd: Move pages accounting into multifd_send_zero_page_detect() 2024-09-03 16:24:35 -03:00
multifd-zlib.c migration/multifd: Make MultiFDMethods const 2024-09-03 16:24:36 -03:00
multifd-zstd.c migration/multifd: Fix loop conditions in multifd_zstd_send_prepare and multifd_zstd_recv 2024-09-18 14:27:24 -04:00
multifd.c migration/multifd: Make MultiFDSendData a struct 2025-03-06 06:47:33 +01:00
multifd.h migration/multifd: Make MultiFDSendData a struct 2025-03-06 06:47:33 +01:00
options.c migration: Add MIG_CMD_SWITCHOVER_START and its load handler 2025-03-06 06:47:33 +01:00
options.h migration: Use device_class_set_props_n 2024-12-19 19:33:37 +01:00
page_cache.c migration: Fix cache_init()'s "Failed to allocate" error messages 2021-02-08 11:19:51 +00:00
page_cache.h migration: Clean up signed vs. unsigned XBZRLE cache-size 2021-02-08 11:19:51 +00:00
postcopy-ram.c overcommit: introduce mem-lock=on-fault 2025-02-12 11:36:13 -05:00
postcopy-ram.h migration/postcopy: Add postcopy-recover-setup phase 2024-06-21 09:47:59 -03:00
qemu-file.c migration: SCM_RIGHTS for QEMUFile 2025-01-29 11:43:05 -03:00
qemu-file.h migration: SCM_RIGHTS for QEMUFile 2025-01-29 11:43:05 -03:00
ram.c migration: Set migration error outside of migrate_cancel 2025-02-14 15:19:05 -03:00
ram.h migration/ram: Move RAM_SAVE_FLAG* into ram.h 2025-01-09 17:38:15 -03:00
rdma.c migration: Change migrate_fd_ to migration_ 2025-02-14 15:19:05 -03:00
rdma.h migration/ram: Move RAM_SAVE_FLAG* into ram.h 2025-01-09 17:38:15 -03:00
savevm.c migration: Add thread pool of optional load threads 2025-03-06 06:47:33 +01:00
savevm.h migration: Add thread pool of optional load threads 2025-03-06 06:47:33 +01:00
socket.c migration: Remove unused socket_send_channel_create_sync 2024-10-08 15:28:55 -04:00
socket.h migration: Remove unused socket_send_channel_create_sync 2024-10-08 15:28:55 -04:00
target.c migration: Add migration prefix to functions in target.c 2023-09-11 08:34:06 +02:00
threadinfo.c migration/multifd: Protect accesses to migration_threads 2023-07-26 10:55:56 +02:00
threadinfo.h migration/multifd: Protect accesses to migration_threads 2023-07-26 10:55:56 +02:00
tls.c migration/multifd: Terminate the TLS connection 2025-02-14 15:19:04 -03:00
tls.h migration/multifd: Terminate the TLS connection 2025-02-14 15:19:04 -03:00
trace-events migration: Add MIG_CMD_SWITCHOVER_START and its load handler 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
vmstate-types.c migration: cpr-transfer mode 2025-01-29 11:56:24 -03:00
vmstate.c qapi: Move include/qapi/qmp/ to include/qobject/ 2025-02-10 15:33:16 +01:00
xbzrle.c migration/xbzrle: Use i386 host/cpuinfo.h 2023-05-23 16:51:18 -07:00
xbzrle.h migration/xbzrle: Use i386 host/cpuinfo.h 2023-05-23 16:51:18 -07:00
yank_functions.c migration/yank: Use channel features 2024-01-29 11:02:12 +08:00
yank_functions.h migration: Move the yank unregister of channel_close out 2021-07-26 12:45:03 +01:00