Signed-off-by: Juan Quintela <quint...@redhat.com>
---
migration/migration.c | 9 ++++++++
migration/migration.h | 1 +
migration/ram.c | 47 ++++++++++++++++++++++++++++++++++++++++++
qapi/common.json | 4 +++-
tests/migration-test.c | 6 ++++++
5 files changed, 66 insertions(+), 1 deletion(-)
diff --git a/migration/migration.c b/migration/migration.c
index d6f8ef342a..69d85cbe5e 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -2141,6 +2141,15 @@ bool migrate_use_multifd(void)
return s->enabled_capabilities[MIGRATION_CAPABILITY_MULTIFD];
}
+bool migrate_use_multifd_zlib(void)
+{
+ MigrationState *s;
+
+ s = migrate_get_current();
+
+ return s->parameters.multifd_compress == MULTIFD_COMPRESS_ZLIB;
+}
+
bool migrate_pause_before_switchover(void)
{
MigrationState *s;
diff --git a/migration/migration.h b/migration/migration.h
index 438f17edad..fc4fb841d4 100644
--- a/migration/migration.h
+++ b/migration/migration.h
@@ -269,6 +269,7 @@ bool migrate_ignore_shared(void);
bool migrate_auto_converge(void);
bool migrate_use_multifd(void);
+bool migrate_use_multifd_zlib(void);
bool migrate_pause_before_switchover(void);
int migrate_multifd_channels(void);
diff --git a/migration/ram.c b/migration/ram.c
index d7f8fe45a8..06b25ac66d 100644
--- a/migration/ram.c
+++ b/migration/ram.c
@@ -582,6 +582,7 @@ exit:
#define MULTIFD_VERSION 1
#define MULTIFD_FLAG_SYNC (1 << 0)
+#define MULTIFD_FLAG_ZLIB (1 << 1)
/* This value needs to be a multiple of qemu_target_page_size() */
#define MULTIFD_PACKET_SIZE (512 * 1024)
@@ -663,6 +664,12 @@ typedef struct {
uint64_t num_pages;
/* syncs main thread and channels */
QemuSemaphore sem_sync;
+ /* stream for compression */
+ z_stream zs;
+ /* compressed buffer */
+ uint8_t *zbuff;
+ /* size of compressed buffer */
+ uint32_t zbuff_len;
} MultiFDSendParams;
typedef struct {
@@ -698,6 +705,12 @@ typedef struct {
uint64_t num_pages;
/* syncs main thread and channels */
QemuSemaphore sem_sync;
+ /* stream for compression */
+ z_stream zs;
+ /* compressed buffer */
+ uint8_t *zbuff;
+ /* size of compressed buffer */
+ uint32_t zbuff_len;
} MultiFDRecvParams;
static int multifd_send_initial_packet(MultiFDSendParams *p, Error **errp)
@@ -1035,6 +1048,9 @@ void multifd_save_cleanup(void)
p->packet_len = 0;
g_free(p->packet);
p->packet = NULL;
+ deflateEnd(&p->zs);
+ g_free(p->zbuff);
+ p->zbuff = NULL;
}
qemu_sem_destroy(&multifd_send_state->channels_ready);
qemu_sem_destroy(&multifd_send_state->sem_sync);
@@ -1198,6 +1214,7 @@ int multifd_save_setup(void)
for (i = 0; i < thread_count; i++) {
MultiFDSendParams *p = &multifd_send_state->params[i];
+ z_stream *zs = &p->zs;
qemu_mutex_init(&p->mutex);
qemu_sem_init(&p->sem, 0);
@@ -1211,6 +1228,17 @@ int multifd_save_setup(void)
p->packet = g_malloc0(p->packet_len);
p->name = g_strdup_printf("multifdsend_%d", i);
socket_send_channel_create(multifd_new_send_channel_async, p);
+ zs->zalloc = Z_NULL;
+ zs->zfree = Z_NULL;
+ zs->opaque = Z_NULL;
+ if (deflateInit(zs, migrate_compress_level()) != Z_OK) {
+ printf("deflate init failed\n");
+ return -1;
+ }
+ /* We will never have more than page_count pages */
+ p->zbuff_len = page_count * qemu_target_page_size();
+ p->zbuff_len *= 2;
+ p->zbuff = g_malloc0(p->zbuff_len);
}
return 0;
}
@@ -1278,6 +1306,9 @@ int multifd_load_cleanup(Error **errp)
p->packet_len = 0;
g_free(p->packet);
p->packet = NULL;
+ inflateEnd(&p->zs);
+ g_free(p->zbuff);
+ p->zbuff = NULL;
}
qemu_sem_destroy(&multifd_recv_state->sem_sync);
g_free(multifd_recv_state->params);
@@ -1396,6 +1427,7 @@ int multifd_load_setup(void)
for (i = 0; i < thread_count; i++) {
MultiFDRecvParams *p = &multifd_recv_state->params[i];
+ z_stream *zs = &p->zs;
qemu_mutex_init(&p->mutex);
qemu_sem_init(&p->sem_sync, 0);
@@ -1405,6 +1437,21 @@ int multifd_load_setup(void)
+ sizeof(ram_addr_t) * page_count;
p->packet = g_malloc0(p->packet_len);
p->name = g_strdup_printf("multifdrecv_%d", i);
+
+ zs->zalloc = Z_NULL;
+ zs->zfree = Z_NULL;
+ zs->opaque = Z_NULL;
+ zs->avail_in = 0;
+ zs->next_in = Z_NULL;
+ if (inflateInit(zs) != Z_OK) {
+ printf("inflate init failed\n");
+ return -1;
+ }
+ /* We will never have more than page_count pages */
+ p->zbuff_len = page_count * qemu_target_page_size();
+ /* We know compression "could" use more space */
+ p->zbuff_len *= 2;
+ p->zbuff = g_malloc0(p->zbuff_len);
}
return 0;
}
diff --git a/qapi/common.json b/qapi/common.json
index 7248172792..89df6854cb 100644
--- a/qapi/common.json
+++ b/qapi/common.json
@@ -201,8 +201,10 @@
#
# @none: no compression.
#
+# @zlib: Compress using zlib.
+#
# Since: 4.1
#
##
{ 'enum': 'MultifdCompress',
- 'data': [ 'none' ] }
+ 'data': [ 'none', 'zlib' ] }
diff --git a/tests/migration-test.c b/tests/migration-test.c
index 8a1ccc2516..2dd4d4c5b4 100644
--- a/tests/migration-test.c
+++ b/tests/migration-test.c
@@ -1119,6 +1119,11 @@ static void test_multifd_tcp_none(void)
test_multifd_tcp("none");
}
+static void test_multifd_tcp_zlib(void)
+{
+ test_multifd_tcp("zlib");
+}
+
int main(int argc, char **argv)
{
char template[] = "/tmp/migration-test-XXXXXX";
@@ -1174,6 +1179,7 @@ int main(int argc, char **argv)
/* qtest_add_func("/migration/ignore_shared", test_ignore_shared); */
qtest_add_func("/migration/xbzrle/unix", test_xbzrle_unix);
qtest_add_func("/migration/multifd/tcp/none", test_multifd_tcp_none);
+ qtest_add_func("/migration/multifd/tcp/zlib", test_multifd_tcp_zlib);
ret = g_test_run();
--
2.20.1
