[Qemu-devel] [PATCH v6 02/27] bootindex: add del_boot_device_path function

[arei.gonglei]

From: Gonglei <arei.gong...@huawei.com>

Introduce del_boot_device_path() to clean up fw_cfg content when
hot-unplugging a device that refers to a bootindex.

Signed-off-by: Gonglei <arei.gong...@huawei.com>
Signed-off-by: Chenliang <chenlian...@huawei.com>
---
 include/sysemu/sysemu.h |  1 +
 vl.c                    | 36 ++++++++++++++++++++++++++++++++++++
 2 files changed, 37 insertions(+)

diff --git a/include/sysemu/sysemu.h b/include/sysemu/sysemu.h
index b343df5..672984c 100644
--- a/include/sysemu/sysemu.h
+++ b/include/sysemu/sysemu.h
@@ -208,6 +208,7 @@ void do_usb_del(Monitor *mon, const QDict *qdict);
 void usb_info(Monitor *mon, const QDict *qdict);
 
 void check_boot_index(int32_t bootindex, Error **errp);
+void del_boot_device_path(DeviceState *dev);
 void add_boot_device_path(int32_t bootindex, DeviceState *dev,
                           const char *suffix);
 char *get_boot_devices_list(size_t *size, bool ignore_suffixes);
diff --git a/vl.c b/vl.c
index 76fb008..5e57541 100644
--- a/vl.c
+++ b/vl.c
@@ -1252,6 +1252,42 @@ void check_boot_index(int32_t bootindex, Error **errp)
     }
 }
 
+static bool is_same_fw_dev_path(DeviceState *src, DeviceState *dst)
+{
+    bool ret = false;
+    char *devpath_src = qdev_get_fw_dev_path(src);
+    char *devpath_dst = qdev_get_fw_dev_path(dst);
+
+    if (!strcmp(devpath_src, devpath_dst)) {
+        ret = true;
+    }
+
+    g_free(devpath_src);
+    g_free(devpath_dst);
+    return ret;
+}
+
+void del_boot_device_path(DeviceState *dev)
+{
+    FWBootEntry *i;
+
+    assert(dev != NULL);
+
+    /* remove all entries of the assigned device */
+    QTAILQ_FOREACH(i, &fw_boot_order, link) {
+        if (i->dev == NULL) {
+            continue;
+        }
+        if ((i->dev == dev || is_same_fw_dev_path(i->dev, dev))) {
+            QTAILQ_REMOVE(&fw_boot_order, i, link);
+            g_free(i->suffix);
+            g_free(i);
+
+            break;
+        }
+    }
+}
+
 void add_boot_device_path(int32_t bootindex, DeviceState *dev,
                           const char *suffix)
 {
-- 
1.7.12.4