block: Remove monitor command block_passwd

Command block_passwd always fails since

Commit c01c214 "block: remove all encryption handling APIs"
(v2.10.0) turned block_passwd into a stub that always fails, and
hardcoded encryption_key_missing to false in query-named-block-nodes
and query-block.

Commit ad1324e "block: remove 'encryption_key_missing' flag from
QAPI" just landed.  Complete the cleanup job: remove block_passwd.

Cc: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20210323101951.3686029-1-armbru@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>

block/monitor/block-hmp-cmds.c

@@ -515,16 +515,6 @@ void hmp_block_stream(Monitor *mon, const QDict *qdict)
     hmp_handle_error(mon, error);
 }
 
-void hmp_block_passwd(Monitor *mon, const QDict *qdict)
-{
-    const char *device = qdict_get_str(qdict, "device");
-    const char *password = qdict_get_str(qdict, "password");
-    Error *err = NULL;
-
-    qmp_block_passwd(true, device, false, NULL, password, &err);
-    hmp_handle_error(mon, err);
-}
-
 void hmp_block_set_io_throttle(Monitor *mon, const QDict *qdict)
 {
     Error *err = NULL;

blockdev.c

@@ -2407,14 +2407,6 @@ void qmp_transaction(TransactionActionList *dev_list,
     job_txn_unref(block_job_txn);
 }
 
-void qmp_block_passwd(bool has_device, const char *device,
-                      bool has_node_name, const char *node_name,
-                      const char *password, Error **errp)
-{
-    error_setg(errp,
-               "Setting block passwords directly is no longer supported");
-}
-
 BlockDirtyBitmapSha256 *qmp_x_debug_block_dirty_bitmap_sha256(const char *node,
                                                               const char *name,
                                                               Error **errp)

hmp-commands.hx

@@ -1493,21 +1493,6 @@ SRST
   used by another monitor command.
 ERST
 
-    {
-        .name       = "block_passwd",
-        .args_type  = "device:B,password:s",
-        .params     = "block_passwd device password",
-        .help       = "set the password of encrypted block devices",
-        .cmd        = hmp_block_passwd,
-    },
-
-SRST
-``block_passwd`` *device* *password*
-  Set the encrypted device *device* password to *password*
-
-  This command is now obsolete and will always return an error since 2.10
-ERST
-
     {
         .name       = "block_set_io_throttle",
         .args_type  = "device:B,bps:l,bps_rd:l,bps_wr:l,iops:l,iops_rd:l,iops_wr:l",

qapi/block-core.json

@@ -1207,20 +1207,6 @@
 ##
 { 'command': 'query-block-jobs', 'returns': ['BlockJobInfo'] }
 
-##
-# @block_passwd:
-#
-# This command sets the password of a block device that has not been open
-# with a password and requires one.
-#
-# This command is now obsolete and will always return an error since 2.10
-#
-##
-{ 'command': 'block_passwd',
-  'data': { '*device': 'str',
-            '*node-name': 'str',
-            'password': 'str' } }
-
 ##
 # @block_resize:
 #

qapi/pragma.json

@@ -6,7 +6,6 @@
     # Commands allowed to return a non-dictionary:
     'command-name-exceptions': [
         'add_client',
-        'block_passwd',
         'block_resize',
         'block_set_io_throttle',
         'client_migrate_info',