qemu /
qemu /
0110c6b86a828c9c2f42fbed4fc0da30ad7bf6eb migration/rdma: Fix QEMUFileHooks method return values
The QEMUFileHooks methods don't come with a written contract. Digging
through the code calling them, we find:
* save_page():
Negative values RAM_SAVE_CONTROL_DELAYED and
RAM_SAVE_CONTROL_NOT_SUPP are special. Any other negative value is
an unspecified error.
qemu_rdma_save_page() returns -EIO or rdma->error_state on error. I
believe the latter is always negative. Nothing stops either of them
to clash with the special values, though. Feels unlikely, but fix
it anyway to return only the special values and -1.
* before_ram_iterate(), after_ram_iterate():
Negative value means error. qemu_rdma_registration_start() and
qemu_rdma_registration_stop() comply as far as I can tell. Make
them comply *obviously*, by returning -1 on error.
* hook_ram_load:
Negative value means error. rdma_load_hook() already returns -1 on
error. Leave it alone.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Li Zhijian <lizhijian@fujitsu.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Message-ID: <20230928132019.2544702-24-armbru@redhat.com>
1 file changed
