From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([140.186.70.92]:45301) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1RaCVq-0007U5-1s for qemu-devel@nongnu.org; Mon, 12 Dec 2011 15:30:15 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1RaCVo-0002Id-HV for qemu-devel@nongnu.org; Mon, 12 Dec 2011 15:30:13 -0500 Received: from cpe-70-123-132-139.austin.res.rr.com ([70.123.132.139]:49768 helo=localhost6.localdomain6) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1RaCVo-0002IO-7R for qemu-devel@nongnu.org; Mon, 12 Dec 2011 15:30:12 -0500 From: Anthony Liguori Date: Mon, 12 Dec 2011 14:29:29 -0600 Message-Id: <1323721784-704-6-git-send-email-aliguori@us.ibm.com> In-Reply-To: <1323721784-704-1-git-send-email-aliguori@us.ibm.com> References: <1323721784-704-1-git-send-email-aliguori@us.ibm.com> Subject: [Qemu-devel] [PATCH v3 05/20] qdev: provide an interface to return canonical path from root (v2) List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Kevin Wolf , Peter Maydell , Anthony Liguori , Stefan Hajnoczi , Jan Kiszka , Markus Armbruster , Luiz Capitulino 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 --- 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