[RFC 3/6] migration: migrate 'blk' command option is deprecated.

[Juan Quintela]

Use 'migrate_set_capability block true' instead.

Signed-off-by: Juan Quintela <quintela@redhat.com>
---
 docs/about/deprecated.rst |  7 +++++++
 qapi/migration.json       | 11 +++++++----
 migration/migration.c     |  5 +++++
 3 files changed, 19 insertions(+), 4 deletions(-)

diff --git a/docs/about/deprecated.rst b/docs/about/deprecated.rst
index c75a3a8f5a..47e98dc95e 100644
--- a/docs/about/deprecated.rst
+++ b/docs/about/deprecated.rst
@@ -440,3 +440,10 @@ The new way to modify migration is using migration 
parameters.
 ``inc`` functionality can be acchieved using
 ``migrate_set_parameter block-incremental true``.
 
+``blk`` migrate command option (since 8.1)
+''''''''''''''''''''''''''''''''''''''''''
+
+The new way to modify migration is using migration parameters.
+``blk`` functionality can be acchieved using
+``migrate_set_parameter block-incremental true``.
+
diff --git a/qapi/migration.json b/qapi/migration.json
index 4ee28df6da..b71e00737e 100644
--- a/qapi/migration.json
+++ b/qapi/migration.json
@@ -1422,7 +1422,8 @@
 #
 # @uri: the Uniform Resource Identifier of the destination VM
 #
-# @blk: do block migration (full disk copy)
+# @blk: do block migration (full disk copy). This option is deprecated.
+#    Use 'migrate_set_capability block true' instead.
 #
 # @inc: incremental disk copy migration.  This option is deprecated.
 #    Use 'migrate_set_parameter block-incremetantal true' instead.
@@ -1434,8 +1435,9 @@
 #
 # Features:
 #
-# @deprecated: option @inc is better set with
-#     'migrate_set_parameter block-incremental true'.
+# @deprecated: options @inc and @blk are better set with
+#     'migrate_set_parameter block-incremental true' and
+#     'migrate_set_capability block true' respectively.
 #
 # Returns: nothing on success
 #
@@ -1458,7 +1460,8 @@
 # <- { "return": {} }
 ##
 { 'command': 'migrate',
-  'data': {'uri': 'str', '*blk': 'bool',
+  'data': {'uri': 'str',
+           '*blk': { 'type': 'bool', 'features': ['deprecated'] },
            '*inc': { 'type': 'bool', 'features': ['deprecated'] },
            '*detach': 'bool', '*resume': 'bool' } }
 
diff --git a/migration/migration.c b/migration/migration.c
index 7ebce7c7bf..b7d5f6b96c 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -1549,6 +1549,11 @@ static bool migrate_prepare(MigrationState *s, bool blk, 
bool blk_inc,
                     "'migrate_set_parameter block-incremental true' instead.");
     }
 
+    if (blk) {
+        warn_report("-blk migrate option is deprecated, use"
+                    "'migrate_set_capability block true' instead.");
+    }
+
     if (resume) {
         if (s->state != MIGRATION_STATUS_POSTCOPY_PAUSED) {
             error_setg(errp, "Cannot resume if there is no "
-- 
2.40.1