efi_loader: list of open protocol infos

Add a list of open protocol infos to each protocol of a handle.

Provide helper functions to access the list items.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Alexander Graf <agraf@suse.de>

diff --git a/include/efi_loader.h b/include/efi_loader.h
index 6185055e78e8fe11e6ff43a97807fd9090748947..637e6e166dec1fb378d46c6e382c330ab751b960 100644 (file)
--- a/include/efi_loader.h
+++ b/include/efi_loader.h
@@ -96,15 +96,28 @@ extern const efi_guid_t efi_file_info_guid;
 extern unsigned int __efi_runtime_start, __efi_runtime_stop;
 extern unsigned int __efi_runtime_rel_start, __efi_runtime_rel_stop;
 
+/*
+ * When a protocol is opened a open protocol info entry is created.
+ * These are maintained in a list.
+ */
+struct efi_open_protocol_info_item {
+       /* Link to the list of open protocol info entries of a protocol */
+       struct list_head link;
+       struct efi_open_protocol_info_entry info;
+};
+
 /*
  * When the UEFI payload wants to open a protocol on an object to get its
  * interface (usually a struct with callback functions), this struct maps the
- * protocol GUID to the respective protocol interface */
+ * protocol GUID to the respective protocol interface
+ */
 struct efi_handler {
        /* Link to the list of protocols of a handle */
        struct list_head link;
        const efi_guid_t *guid;
        void *protocol_interface;
+       /* Link to the list of open protocol info items */
+       struct list_head open_infos;
 };
 
 /*

diff --git a/lib/efi_loader/efi_boottime.c b/lib/efi_loader/efi_boottime.c
index f4c42eb9f90fc897fd8ae3b751daa7980aea2811..8fb4e3ed232f95632ebb47ced506e1ac283765f4 100644 (file)
--- a/lib/efi_loader/efi_boottime.c
+++ b/lib/efi_loader/efi_boottime.c
@@ -814,6 +814,40 @@ struct efi_object *efi_search_obj(const void *handle)
        return NULL;
 }
 
+/*
+ * Create open protocol info entry and add it to a protocol.
+ *
+ * @handler    handler of a protocol
+ * @return     open protocol info entry
+ */
+static struct efi_open_protocol_info_entry *efi_create_open_info(
+                       struct efi_handler *handler)
+{
+       struct efi_open_protocol_info_item *item;
+
+       item = calloc(1, sizeof(struct efi_open_protocol_info_item));
+       if (!item)
+               return NULL;
+       /* Append the item to the open protocol info list. */
+       list_add_tail(&item->link, &handler->open_infos);
+
+       return &item->info;
+}
+
+/*
+ * Remove an open protocol info entry from a protocol.
+ *
+ * @handler    handler of a protocol
+ * @return     status code
+ */
+static efi_status_t efi_delete_open_info(
+                       struct efi_open_protocol_info_item *item)
+{
+       list_del(&item->link);
+       free(item);
+       return EFI_SUCCESS;
+}
+
 /*
  * Install new protocol on a handle.
  *
@@ -840,6 +874,7 @@ efi_status_t efi_add_protocol(const void *handle, const efi_guid_t *protocol,
                return EFI_OUT_OF_RESOURCES;
        handler->guid = protocol;
        handler->protocol_interface = protocol_interface;
+       INIT_LIST_HEAD(&handler->open_infos);
        list_add_tail(&handler->link, &efiobj->protocols);
        return EFI_SUCCESS;
 }