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migration: Make ram_save_target_page() a pointer

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We are going to create a new function for multifd latest in the series.

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
This commit is contained in:
Juan Quintela 2021-12-15 20:10:39 +01:00
parent 8d80e1951e
commit 4010ba388d
1 changed files with 15 additions and 4 deletions
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19
migration/ram.c
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@ -452,6 +452,13 @@ void dirty_sync_missed_zero_copy(void)
ram_counters.dirty_sync_missed_zero_copy++;
}
struct MigrationOps {
int (*ram_save_target_page)(RAMState *rs, PageSearchStatus *pss);
};
typedef struct MigrationOps MigrationOps;
MigrationOps *migration_ops;
CompressionStats compression_counters;
struct CompressParam {
@ -2295,14 +2302,14 @@ static bool save_compress_page(RAMState *rs, PageSearchStatus *pss,
}
/**
* ram_save_target_page: save one target page
* ram_save_target_page_legacy: save one target page
*
* Returns the number of pages written
*
* @rs: current RAM state
* @pss: data about the page we want to send
*/
static int ram_save_target_page(RAMState *rs, PageSearchStatus *pss)
static int ram_save_target_page_legacy(RAMState *rs, PageSearchStatus *pss)
{
RAMBlock *block = pss->block;
ram_addr_t offset = ((ram_addr_t)pss->page) << TARGET_PAGE_BITS;
@ -2428,7 +2435,7 @@ static int ram_save_host_page_urgent(PageSearchStatus *pss)
if (page_dirty) {
/* Be strict to return code; it must be 1, or what else? */
if (ram_save_target_page(rs, pss) != 1) {
if (migration_ops->ram_save_target_page(rs, pss) != 1) {
error_report_once("%s: ram_save_target_page failed", __func__);
ret = -1;
goto out;
@ -2497,7 +2504,7 @@ static int ram_save_host_page(RAMState *rs, PageSearchStatus *pss)
if (preempt_active) {
qemu_mutex_unlock(&rs->bitmap_mutex);
}
tmppages = ram_save_target_page(rs, pss);
tmppages = migration_ops->ram_save_target_page(rs, pss);
if (tmppages >= 0) {
pages += tmppages;
/*
@ -2697,6 +2704,8 @@ static void ram_save_cleanup(void *opaque)
xbzrle_cleanup();
compress_threads_save_cleanup();
ram_state_cleanup(rsp);
g_free(migration_ops);
migration_ops = NULL;
}
static void ram_state_reset(RAMState *rs)
@ -3252,6 +3261,8 @@ static int ram_save_setup(QEMUFile *f, void *opaque)
ram_control_before_iterate(f, RAM_CONTROL_SETUP);
ram_control_after_iterate(f, RAM_CONTROL_SETUP);
migration_ops = g_malloc0(sizeof(MigrationOps));
migration_ops->ram_save_target_page = ram_save_target_page_legacy;
ret = multifd_send_sync_main(f);
if (ret < 0) {
return ret;