1 files changed, 35 insertions, 1 deletions

diff --git a/migration/options.c b/migration/options.c
index 42fb818956..9a39826ca5 100644
--- a/migration/options.c
+++ b/migration/options.c
@@ -12,6 +12,7 @@
  */
 
 #include "qemu/osdep.h"
+#include "qemu/error-report.h"
 #include "exec/target_page.h"
 #include "qapi/clone-visitor.h"
 #include "qapi/error.h"
@@ -473,10 +474,19 @@ bool migrate_caps_check(bool *old_caps, bool *new_caps, Error **errp)
     if (new_caps[MIGRATION_CAPABILITY_BLOCK]) {
         error_setg(errp, "QEMU compiled without old-style (blk/-b, inc/-i) "
                    "block migration");
-        error_append_hint(errp, "Use drive_mirror+NBD instead.\n");
+        error_append_hint(errp, "Use blockdev-mirror with NBD instead.\n");
         return false;
     }
 #endif
+    if (new_caps[MIGRATION_CAPABILITY_BLOCK]) {
+        warn_report("block migration is deprecated;"
+                    " use blockdev-mirror with NBD instead");
+    }
+
+    if (new_caps[MIGRATION_CAPABILITY_COMPRESS]) {
+        warn_report("old compression method is deprecated;"
+                    " use multifd compression methods instead");
+    }
 
 #ifndef CONFIG_REPLICATION
     if (new_caps[MIGRATION_CAPABILITY_X_COLO]) {
@@ -618,6 +628,20 @@ bool migrate_caps_check(bool *old_caps, bool *new_caps, Error **errp)
         }
     }
 
+    if (new_caps[MIGRATION_CAPABILITY_MULTIFD]) {
+        if (new_caps[MIGRATION_CAPABILITY_XBZRLE]) {
+            error_setg(errp, "Multifd is not compatible with xbzrle");
+            return false;
+        }
+    }
+
+    if (new_caps[MIGRATION_CAPABILITY_COMPRESS]) {
+        if (new_caps[MIGRATION_CAPABILITY_XBZRLE]) {
+            error_setg(errp, "Compression is not compatible with xbzrle");
+            return false;
+        }
+    }
+
     return true;
 }
 
@@ -1316,18 +1340,26 @@ static void migrate_params_apply(MigrateSetParameters *params, Error **errp)
     /* TODO use QAPI_CLONE() instead of duplicating it inline */
 
     if (params->has_compress_level) {
+        warn_report("old compression is deprecated;"
+                    " use multifd compression methods instead");
         s->parameters.compress_level = params->compress_level;
     }
 
     if (params->has_compress_threads) {
+        warn_report("old compression is deprecated;"
+                    " use multifd compression methods instead");
         s->parameters.compress_threads = params->compress_threads;
     }
 
     if (params->has_compress_wait_thread) {
+        warn_report("old compression is deprecated;"
+                    " use multifd compression methods instead");
         s->parameters.compress_wait_thread = params->compress_wait_thread;
     }
 
     if (params->has_decompress_threads) {
+        warn_report("old compression is deprecated;"
+                    " use multifd compression methods instead");
         s->parameters.decompress_threads = params->decompress_threads;
     }
 
@@ -1386,6 +1418,8 @@ static void migrate_params_apply(MigrateSetParameters *params, Error **errp)
     }
 
     if (params->has_block_incremental) {
+        warn_report("block migration is deprecated;"
+                    " use blockdev-mirror with NBD instead");
         s->parameters.block_incremental = params->block_incremental;
     }
     if (params->has_multifd_channels) {