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migration/multifd: Add multifd_device_state_supported()

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Since device state transfer via multifd channels requires multifd
channels with packets and is currently not compatible with multifd
compression add an appropriate query function so device can learn
whether it can actually make use of it.

Reviewed-by: Fabiano Rosas <farosas@suse.de>
Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Maciej S. Szmigiero <maciej.szmigiero@oracle.com>
Link: https://lore.kernel.org/qemu-devel/1ff0d98b85f470e5a33687406e877583b8fab74e.1741124640.git.maciej.szmigiero@oracle.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>
This commit is contained in:
Maciej S. Szmigiero 2025-03-04 23:03:43 +01:00 • committed by Cédric Le Goater
parent 99fab22350
commit a1131aa942
2 changed files with 8 additions and 0 deletions
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include/migration/misc.h
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@ -121,5 +121,6 @@ bool migrate_uri_parse(const char *uri, MigrationChannel **channel,
/* migration/multifd-device-state.c */
bool multifd_queue_device_state(char *idstr, uint32_t instance_id,
char *data, size_t len);
bool multifd_device_state_supported(void);
#endif