[Qemu-devel] [patch 08/24] QEMU/KVM: drive removal support

[Marcelo Tosatti <mtosatti@redhat.com>]

[-- Attachment #1: device-removal --]
[-- Type: text/plain, Size: 2131 bytes --]

To be used by hot-remove.

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

Index: kvm-userspace.hotplug2/qemu/vl.c
===================================================================
--- kvm-userspace.hotplug2.orig/qemu/vl.c
+++ kvm-userspace.hotplug2/qemu/vl.c
@@ -5010,6 +5010,12 @@ static int drive_add(const char *file, c
     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;
@@ -5040,6 +5046,20 @@ int drive_get_max_bus(BlockInterfaceType
     return max_bus;
 }
 
+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)
 {
@@ -5313,6 +5333,7 @@ static int drive_init(struct drive_opt *
     drives_table[drives_table_idx].type = type;
     drives_table[drives_table_idx].bus = bus_id;
     drives_table[drives_table_idx].unit = unit_id;
+    drives_table[drives_table_idx].drive_opt_idx = arg - drives_opt;
     nb_drives++;
 
     switch(type) {
Index: kvm-userspace.hotplug2/qemu/sysemu.h
===================================================================
--- kvm-userspace.hotplug2.orig/qemu/sysemu.h
+++ kvm-userspace.hotplug2/qemu/sysemu.h
@@ -140,6 +140,7 @@ typedef struct DriveInfo {
     int bus;
     int unit;
     int used;
+    int drive_opt_idx;
 } DriveInfo;
 
 #define MAX_IDE_DEVS	2
@@ -153,6 +154,9 @@ int extboot_drive;
 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);
+
 /* acpi */
 void qemu_system_cpu_hot_add(int cpu, int state);
 void qemu_system_hot_add_init(char *cpu_model);

--