[Qemu-devel] [PATCH 3/3 v4] Enable migration without shared storage from the monitor

[lirans]

This patch adds the option to activate non-shared storage migration from the
monitor.
The migration command is as follows:
(qemu) migrate -d tcp:0:4444 # for ordinary live migration
(qemu) migrate -d -b tcp:0:4444 # for live migration with complete storage copy
(qemu) migrate -d -i tcp:0:4444 # for live migration with incremental storage 
copy, storage is cow based.

Signed-off-by: Liran Schour <address@hidden>
---
diff --git a/monitor.c b/monitor.c
index 3424e60..ae29181 100644
--- a/monitor.c
+++ b/monitor.c
@@ -2907,6 +2907,18 @@ static int default_fmt_size = 4;
 
 #define MAX_ARGS 16
 
+static int is_valid_option(const char *c, const char *typestr)
+{
+  char option[3];
+  
+  option[0] = '-';
+  option[1] = *c;
+  option[2] = '\0';
+  
+  typestr = strstr(typestr, option);
+  return (typestr != NULL);
+}
+
 static const mon_cmd_t *monitor_parse_command(Monitor *mon,
                                               const char *cmdline,
                                               QDict *qdict)
@@ -3099,8 +3111,9 @@ static const mon_cmd_t *monitor_parse_command(Monitor 
*mon,
             break;
         case '-':
             {
-                int has_option;
-                /* option */
+               const char *tmp = p;
+               int has_option, skip_key = 0;
+               /* option */
 
                 c = *typestr++;
                 if (c == '\0')
@@ -3110,15 +3123,24 @@ static const mon_cmd_t *monitor_parse_command(Monitor 
*mon,
                 has_option = 0;
                 if (*p == '-') {
                     p++;
-                    if (*p != c) {
-                        monitor_printf(mon, "%s: unsupported option -%c\n",
+                   if(c != *p) {
+                       if(!is_valid_option(p, typestr)) {
+                  
+                           monitor_printf(mon, "%s: unsupported option -%c\n",
                                        cmdname, *p);
-                        goto fail;
+                           goto fail;
+                       } else {
+                           skip_key = 1;
+                       }
                     }
-                    p++;
-                    has_option = 1;
+                   if(skip_key) {
+                       p = tmp;
+                   } else {
+                       p++;
+                       has_option = 1;
+                   }
                 }
-                qdict_put(qdict, key, qint_from_int(has_option));
+               qdict_put(qdict, key, qint_from_int(has_option));
             }
             break;
         default:
diff --git a/qemu-monitor.hx b/qemu-monitor.hx
index 29999c6..ec856d9 100644
--- a/qemu-monitor.hx
+++ b/qemu-monitor.hx
@@ -721,15 +721,22 @@ ETEXI
 
     {
         .name       = "migrate",
-        .args_type  = "detach:-d,uri:s",
-        .params     = "[-d] uri",
-        .help       = "migrate to URI (using -d to not wait for completion)",
+        .args_type  = "detach:-d,blk:-b,inc:-i,uri:s",
+        .params     = "[-d] [-b] [-i] uri",
+        .help       = "migrate to URI (using -d to not wait for completion)"
+                     "\n\t\t\t -b for migration without shared storage with"
+                     " full copy of disk\n\t\t\t -i for migration without "
+                     "shared storage with incremental copy of disk "
+                     "(base image shared between src and destination)",
         .mhandler.cmd = do_migrate,
     },
 
+
 STEXI
 @item migrate [-d] @var{uri}
 Migrate to @var{uri} (using -d to not wait for completion).
+       -b for migration with full copy of disk
+       -i for migration with incremental copy of disk (base image is shared)
 ETEXI
 
     {