[Qemu-devel] [6596] qemu: drive removal support (Marcelo Tosatti)

[Qemu-devel] [6596] qemu: drive removal support (Marcelo Tosatti)

[Anthony Liguori]

Revision: 6596
          http://svn.sv.gnu.org/viewvc/?view=rev&root=qemu&revision=6596
Author:   aliguori
Date:     2009-02-11 15:20:20 +0000 (Wed, 11 Feb 2009)

Log Message:
-----------
qemu: drive removal support (Marcelo Tosatti)

To be used by hot-remove.

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

Modified Paths:
--------------
    trunk/sysemu.h
    trunk/vl.c

Modified: trunk/sysemu.h
===================================================================
--- trunk/sysemu.h	2009-02-11 15:20:03 UTC (rev 6595)
+++ trunk/sysemu.h	2009-02-11 15:20:20 UTC (rev 6596)
@@ -135,6 +135,7 @@
     int bus;
     int unit;
     int used;
+    int drive_opt_idx;
     BlockInterfaceErrorAction onerror;
     char serial[21];
 } DriveInfo;
@@ -148,6 +149,8 @@
 
 extern int drive_get_index(BlockInterfaceType type, int bus, int unit);
 extern int drive_get_max_bus(BlockInterfaceType type);
+extern void drive_uninit(BlockDriverState *bdrv);
+extern void drive_remove(int index);
 extern const char *drive_get_serial(BlockDriverState *bdrv);
 extern BlockInterfaceErrorAction drive_get_onerror(BlockDriverState *bdrv);
 

Modified: trunk/vl.c
===================================================================
--- trunk/vl.c	2009-02-11 15:20:03 UTC (rev 6595)
+++ trunk/vl.c	2009-02-11 15:20:20 UTC (rev 6596)
@@ -2182,6 +2182,12 @@
     return index;
 }
 
+void drive_remove(int index)
+{
+    drives_opt[index].used = 0;
+    nb_drives_opt--;
+}
+
 int drive_get_index(BlockInterfaceType type, int bus, int unit)
 {
     int index;
@@ -2239,6 +2245,20 @@
     fprintf(stderr, " %s", name);
 }
 
+void drive_uninit(BlockDriverState *bdrv)
+{
+    int i;
+
+    for (i = 0; i < MAX_DRIVES; i++)
+        if (drives_table[i].bdrv == bdrv) {
+            drives_table[i].bdrv = NULL;
+            drives_table[i].used = 0;
+            drive_remove(drives_table[i].drive_opt_idx);
+            nb_drives--;
+            break;
+        }
+}
+
 static int drive_init(struct drive_opt *arg, int snapshot,
                       QEMUMachine *machine)
 {
@@ -2538,6 +2558,7 @@
     drives_table[drives_table_idx].bus = bus_id;
     drives_table[drives_table_idx].unit = unit_id;
     drives_table[drives_table_idx].onerror = onerror;
+    drives_table[drives_table_idx].drive_opt_idx = arg - drives_opt;
     strncpy(drives_table[nb_drives].serial, serial, sizeof(serial));
     nb_drives++;