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migration/multifd: Support incoming mapped-ram stream format

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For the incoming mapped-ram migration we need to read the ramblock
headers, get the pages bitmap and send the host address of each
non-zero page to the multifd channel thread for writing.

Usage on HMP is:

(qemu) migrate_set_capability multifd on
(qemu) migrate_set_capability mapped-ram on
(qemu) migrate_incoming file:migfile

(the ram.h include needs to move because we've been previously relying
on it being included from migration.c. Now file.h will start including
multifd.h before migration.o is processed)

Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Fabiano Rosas <farosas@suse.de>
Link: https://lore.kernel.org/r/20240229153017.2221-22-farosas@suse.de
Signed-off-by: Peter Xu <peterx@redhat.com>
This commit is contained in:
Fabiano Rosas 2024-02-29 12:30:15 -03:00 • committed by Peter Xu
parent f427d90b98
commit a49d15a38d
5 changed files with 73 additions and 6 deletions
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2
migration/file.h
View file

@ -11,6 +11,7 @@
#include "qapi/qapi-types-migration.h"
#include "io/task.h"
#include "channel.h"
#include "multifd.h"
void file_start_incoming_migration(FileMigrationArgs *file_args, Error **errp);
@ -21,4 +22,5 @@ void file_cleanup_outgoing_migration(void);
bool file_send_channel_create(gpointer opaque, Error **errp);
int file_write_ramblock_iov(QIOChannel *ioc, const struct iovec *iov,
int niov, RAMBlock *block, Error **errp);
int multifd_file_recv_data(MultiFDRecvParams *p, Error **errp);
#endif