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[Qemu-devel] [PATCH v3 005/197] qdev: provide an interface to return can
From: |
Anthony Liguori |
Subject: |
[Qemu-devel] [PATCH v3 005/197] qdev: provide an interface to return canonical path from root (v2) |
Date: |
Mon, 12 Dec 2011 14:18:01 -0600 |
The canonical path is the path in the composition tree from the root to the
device. This is effectively the name of the device.
This is an incredibly unefficient implementation that will be optimized in
a future patch.
Signed-off-by: Anthony Liguori <address@hidden>
---
v1 -> v2
- change from gslist to qemu-queue (Kevin/Gerd)
---
hw/qdev.c | 48 ++++++++++++++++++++++++++++++++++++++++++++++++
hw/qdev.h | 9 +++++++++
2 files changed, 57 insertions(+), 0 deletions(-)
diff --git a/hw/qdev.c b/hw/qdev.c
index bb0b9f7..79849c9 100644
--- a/hw/qdev.c
+++ b/hw/qdev.c
@@ -1173,3 +1173,51 @@ DeviceState *qdev_get_root(void)
return qdev_root;
}
+
+static gchar *qdev_get_path_in(DeviceState *parent, DeviceState *dev)
+{
+ DeviceProperty *prop;
+
+ if (parent == dev) {
+ return g_strdup("");
+ }
+
+ QTAILQ_FOREACH(prop, &parent->properties, node) {
+ gchar *subpath;
+
+ if (!strstart(prop->type, "child<", NULL)) {
+ continue;
+ }
+
+ /* Check to see if the device is one of parent's children */
+ if (prop->opaque == dev) {
+ return g_strdup(prop->name);
+ }
+
+ /* Check to see if the device is a child of our child */
+ subpath = qdev_get_path_in(prop->opaque, dev);
+ if (subpath) {
+ gchar *path;
+
+ path = g_strdup_printf("%s/%s", prop->name, subpath);
+ g_free(subpath);
+
+ return path;
+ }
+ }
+
+ return NULL;
+}
+
+gchar *qdev_get_canonical_path(DeviceState *dev)
+{
+ gchar *path, *newpath;
+
+ path = qdev_get_path_in(qdev_get_root(), dev);
+ g_assert(path != NULL);
+
+ newpath = g_strdup_printf("/%s", path);
+ g_free(path);
+
+ return newpath;
+}
diff --git a/hw/qdev.h b/hw/qdev.h
index 52aadd2..0f00497 100644
--- a/hw/qdev.h
+++ b/hw/qdev.h
@@ -490,4 +490,13 @@ void qdev_property_add_legacy(DeviceState *dev, Property
*prop, Error **errp);
*/
DeviceState *qdev_get_root(void);
+/**
+ * @qdev_get_canonical_path - returns the canonical path for a device. This
+ * is the path within the composition tree starting from the root.
+ *
+ * Returns:
+ * The canonical path in the composition tree.
+ */
+gchar *qdev_get_canonical_path(DeviceState *dev);
+
#endif
--
1.7.4.1
- [Qemu-devel] [PATCH v3 000/197] qom: dynamic properties and composition tree (v2), Anthony Liguori, 2011/12/12
- [Qemu-devel] [PATCH v3 001/197] qom: add a reference count to qdev objects, Anthony Liguori, 2011/12/12
- [Qemu-devel] [PATCH v3 003/197] qom: register legacy properties as new style properties (v2), Anthony Liguori, 2011/12/12
- [Qemu-devel] [PATCH v3 002/197] qom: add new dynamic property infrastructure based on Visitors (v2), Anthony Liguori, 2011/12/12
- [Qemu-devel] [PATCH v3 005/197] qdev: provide an interface to return canonical path from root (v2),
Anthony Liguori <=
- [Qemu-devel] [PATCH v3 006/197] qdev: provide a path resolution (v2), Anthony Liguori, 2011/12/12
- [Qemu-devel] [PATCH v3 007/197] qom: add child properties (composition) (v2), Anthony Liguori, 2011/12/12
- [Qemu-devel] [PATCH v3 008/197] qom: add link properties (v2), Anthony Liguori, 2011/12/12
- [Qemu-devel] [PATCH v3 009/197] qapi: allow a 'gen' key to suppress code generation, Anthony Liguori, 2011/12/12
- [Qemu-devel] [PATCH v3 010/197] qmp: add qom-list command, Anthony Liguori, 2011/12/12
- [Qemu-devel] [PATCH v3 011/197] qom: qom_{get, set} monitor commands (v2), Anthony Liguori, 2011/12/12
- [Qemu-devel] [PATCH v3 015/197] rtc: add a dynamic property for retrieving the date, Anthony Liguori, 2011/12/12
- [Qemu-devel] [PATCH v3 016/197] qom: optimize qdev_get_canonical_path using a parent link, Anthony Liguori, 2011/12/12
- [Qemu-devel] [PATCH v3 017/197] qmp: make qmp.py easier to use, Anthony Liguori, 2011/12/12
- [Qemu-devel] [PATCH v3 018/197] qom: add test tools (v2), Anthony Liguori, 2011/12/12