efi_open_protocol_information provides the agent and controller
handles as well as the attributes and open count of an protocol
on a handle.
Signed-off-by: Heinrich Schuchardt <xypron.g...@gmx.de>
---
v3
no change
v2
no change
---
lib/efi_loader/efi_boottime.c | 41 ++++++++++++++++++++++++++++++++++++++++-
1 file changed, 40 insertions(+), 1 deletion(-)
diff --git a/lib/efi_loader/efi_boottime.c b/lib/efi_loader/efi_boottime.c
index a527e33141..44c9da0a7c 100644
--- a/lib/efi_loader/efi_boottime.c
+++ b/lib/efi_loader/efi_boottime.c
@@ -1722,9 +1722,48 @@ static efi_status_t EFIAPI
efi_open_protocol_information(efi_handle_t handle,
struct efi_open_protocol_info_entry **entry_buffer,
efi_uintn_t *entry_count)
{
+ unsigned long buffer_size;
+ unsigned long count;
+ struct efi_handler *handler;
+ struct efi_open_protocol_info_item *item;
+ efi_status_t r;
+
EFI_ENTRY("%p, %pUl, %p, %p", handle, protocol, entry_buffer,
entry_count);
- return EFI_EXIT(EFI_NOT_FOUND);
+
+ /* Check parameters */
+ if (!entry_buffer) {
+ r = EFI_INVALID_PARAMETER;
+ goto out;
+ }
+ r = efi_search_protocol(handle, protocol, &handler);
+ if (r != EFI_SUCCESS)
+ goto out;
+
+ /* Count entries */
+ count = 0;
+ list_for_each_entry(item, &handler->open_infos, link) {
+ ++count;
+ }
+ *entry_count = count;
+ *entry_buffer = NULL;
+ if (!count) {
+ r = EFI_SUCCESS;
+ goto out;
+ }
+
+ /* Copy entries */
+ buffer_size = count * sizeof(struct efi_open_protocol_info_entry);
+ r = efi_allocate_pool(EFI_ALLOCATE_ANY_PAGES, buffer_size,
+ (void **)entry_buffer);
+ if (r != EFI_SUCCESS)
+ goto out;
+ list_for_each_entry_reverse(item, &handler->open_infos, link) {
+ if (item->info.open_count)
+ (*entry_buffer)[--count] = item->info;
+ }
+out:
+ return EFI_EXIT(r);
}
/*
--
2.14.2
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