@@ -501,6 +501,77 @@ ssize_t tb_property_format_dir(const struct tb_property_dir *dir, u32 *block,
return ret < 0 ? ret : 0;
}
+/**
+ * tb_property_copy_dir() - Take a deep copy of directory
+ * @dir: Directory to copy
+ *
+ * This function takes a deep copy of @dir and returns back the copy. In
+ * case of error returns %NULL. The resulting directory needs to be
+ * released by calling tb_property_free_dir().
+ */
+struct tb_property_dir *tb_property_copy_dir(const struct tb_property_dir *dir)
+{
+ struct tb_property *property, *p = NULL;
+ struct tb_property_dir *d;
+
+ if (!dir)
+ return NULL;
+
+ d = tb_property_create_dir(dir->uuid);
+ if (!d)
+ return NULL;
+
+ list_for_each_entry(property, &dir->properties, list) {
+ struct tb_property *p;
+
+ p = tb_property_alloc(property->key, property->type);
+ if (!p)
+ goto err_free;
+
+ p->length = property->length;
+
+ switch (property->type) {
+ case TB_PROPERTY_TYPE_DIRECTORY:
+ p->value.dir = tb_property_copy_dir(property->value.dir);
+ if (!p->value.dir)
+ goto err_free;
+ break;
+
+ case TB_PROPERTY_TYPE_DATA:
+ p->value.data = kmemdup(property->value.data,
+ property->length * 4,
+ GFP_KERNEL);
+ if (!p->value.data)
+ goto err_free;
+ break;
+
+ case TB_PROPERTY_TYPE_TEXT:
+ p->value.text = kzalloc(p->length * 4, GFP_KERNEL);
+ if (!p->value.text)
+ goto err_free;
+ strcpy(p->value.text, property->value.text);
+ break;
+
+ case TB_PROPERTY_TYPE_VALUE:
+ p->value.immediate = property->value.immediate;
+ break;
+
+ default:
+ break;
+ }
+
+ list_add_tail(&p->list, &d->properties);
+ }
+
+ return d;
+
+err_free:
+ kfree(p);
+ tb_property_free_dir(d);
+
+ return NULL;
+}
+
/**
* tb_property_add_immediate() - Add immediate property to directory
* @parent: Directory to add the property
@@ -146,6 +146,7 @@ struct tb_property_dir *tb_property_parse_dir(const u32 *block,
size_t block_len);
ssize_t tb_property_format_dir(const struct tb_property_dir *dir, u32 *block,
size_t block_len);
+struct tb_property_dir *tb_property_copy_dir(const struct tb_property_dir *dir);
struct tb_property_dir *tb_property_create_dir(const uuid_t *uuid);
void tb_property_free_dir(struct tb_property_dir *dir);
int tb_property_add_immediate(struct tb_property_dir *parent, const char *key,
This function takes a deep copy of the properties. We need this in order to support more dynamic properties per XDomain connection as required by the USB4 inter-domain service spec. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> --- drivers/thunderbolt/property.c | 71 ++++++++++++++++++++++++++++++++++ include/linux/thunderbolt.h | 1 + 2 files changed, 72 insertions(+)