[U-Boot] [PATCH 1/1] efi_loader: manage protocols in a linked list
Heinrich Schuchardt
xypron.glpk at gmx.de
Wed Nov 1 08:31:41 UTC 2017
Signed-off-by: Heinrich Schuchardt <xypron.glpk at gmx.de>
---
include/efi_loader.h | 6 ++-
lib/efi_loader/efi_boottime.c | 107 ++++++++++++++++++++----------------------
lib/efi_loader/efi_disk.c | 1 +
lib/efi_loader/efi_gop.c | 1 +
lib/efi_loader/efi_net.c | 1 +
5 files changed, 58 insertions(+), 58 deletions(-)
diff --git a/include/efi_loader.h b/include/efi_loader.h
index e1f0af3496..a73bbc1269 100644
--- a/include/efi_loader.h
+++ b/include/efi_loader.h
@@ -101,6 +101,8 @@ extern unsigned int __efi_runtime_rel_start, __efi_runtime_rel_stop;
* interface (usually a struct with callback functions), this struct maps the
* 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;
};
@@ -115,8 +117,8 @@ struct efi_handler {
struct efi_object {
/* Every UEFI object is part of a global object list */
struct list_head link;
- /* We support up to 16 "protocols" an object can be accessed through */
- struct efi_handler protocols[16];
+ /* The list of protocols */
+ struct list_head protocols;
/* The object spawner can either use this for data or as identifier */
void *handle;
};
diff --git a/lib/efi_loader/efi_boottime.c b/lib/efi_loader/efi_boottime.c
index 2b3db162a1..cee0cb1390 100644
--- a/lib/efi_loader/efi_boottime.c
+++ b/lib/efi_loader/efi_boottime.c
@@ -339,6 +339,7 @@ efi_status_t efi_create_handle(void **handle)
return r;
memset(obj, 0, sizeof(struct efi_object));
obj->handle = obj;
+ INIT_LIST_HEAD(&obj->protocols);
list_add_tail(&obj->link, &efi_obj_list);
*handle = obj;
return r;
@@ -715,18 +716,17 @@ efi_status_t efi_search_protocol(const void *handle,
struct efi_handler **handler)
{
struct efi_object *efiobj;
- size_t i;
- struct efi_handler *protocol;
+ struct list_head *lhandle;
if (!handle || !protocol_guid)
return EFI_INVALID_PARAMETER;
efiobj = efi_search_obj(handle);
if (!efiobj)
return EFI_INVALID_PARAMETER;
- for (i = 0; i < ARRAY_SIZE(efiobj->protocols); i++) {
- protocol = &efiobj->protocols[i];
- if (!protocol->guid)
- continue;
+ list_for_each(lhandle, &efiobj->protocols) {
+ struct efi_handler *protocol;
+
+ protocol = list_entry(lhandle, struct efi_handler, link);
if (!guidcmp(protocol->guid, protocol_guid)) {
if (handler)
*handler = protocol;
@@ -750,7 +750,6 @@ efi_status_t efi_add_protocol(const void *handle, const efi_guid_t *protocol,
struct efi_object *efiobj;
struct efi_handler *handler;
efi_status_t ret;
- size_t i;
efiobj = efi_search_obj(handle);
if (!efiobj)
@@ -761,16 +760,10 @@ efi_status_t efi_add_protocol(const void *handle, const efi_guid_t *protocol,
handler = calloc(1, sizeof(struct efi_handler));
if (!handler)
return EFI_OUT_OF_RESOURCES;
- /* Install protocol in first empty slot. */
- for (i = 0; i < ARRAY_SIZE(efiobj->protocols); i++) {
- handler = &efiobj->protocols[i];
- if (handler->guid)
- continue;
- handler->guid = protocol;
- handler->protocol_interface = protocol_interface;
- return EFI_SUCCESS;
- }
- return EFI_OUT_OF_RESOURCES;
+ handler->guid = protocol;
+ handler->protocol_interface = protocol_interface;
+ list_add_tail(&handler->link, &efiobj->protocols);
+ return EFI_SUCCESS;
}
/*
@@ -790,10 +783,10 @@ efi_status_t efi_remove_protocol(const void *handle, const efi_guid_t *protocol,
ret = efi_search_protocol(handle, protocol, &handler);
if (ret != EFI_SUCCESS)
return ret;
- if (handler->protocol_interface != protocol_interface)
- return EFI_NOT_FOUND;
- handler->guid = NULL;
- handler->protocol_interface = NULL;
+ if (guidcmp(handler->guid, protocol))
+ return EFI_INVALID_PARAMETER;
+ list_del(&handler->link);
+ free(handler);
return EFI_SUCCESS;
}
@@ -806,17 +799,22 @@ efi_status_t efi_remove_protocol(const void *handle, const efi_guid_t *protocol,
efi_status_t efi_remove_all_protocols(const void *handle)
{
struct efi_object *efiobj;
- struct efi_handler *handler;
- size_t i;
+ struct list_head *lhandle;
+ struct list_head *pos;
efiobj = efi_search_obj(handle);
if (!efiobj)
return EFI_INVALID_PARAMETER;
+ list_for_each_safe(lhandle, pos, &efiobj->protocols) {
+ struct efi_handler *protocol;
+ efi_status_t ret;
- for (i = 0; i < ARRAY_SIZE(efiobj->protocols); i++) {
- handler = &efiobj->protocols[i];
- handler->guid = NULL;
- handler->protocol_interface = NULL;
+ protocol = list_entry(lhandle, struct efi_handler, link);
+
+ ret = efi_remove_protocol(handle, protocol->guid,
+ protocol->protocol_interface);
+ if (ret != EFI_SUCCESS)
+ return ret;
}
return EFI_SUCCESS;
}
@@ -1171,6 +1169,7 @@ void efi_setup_loaded_image(struct efi_loaded_image *info, struct efi_object *ob
if (device_path)
info->device_handle = efi_dp_find_obj(device_path, NULL);
+ INIT_LIST_HEAD(&obj->protocols);
list_add_tail(&obj->link, &efi_obj_list);
/*
* When asking for the device path interface, return
@@ -1648,8 +1647,7 @@ static efi_status_t EFIAPI efi_protocols_per_handle(void *handle,
{
unsigned long buffer_size;
struct efi_object *efiobj;
- unsigned long i, j;
- struct list_head *lhandle;
+ struct list_head *protocol_handle;
efi_status_t r;
EFI_ENTRY("%p, %p, %p", handle, protocol_buffer,
@@ -1660,36 +1658,33 @@ static efi_status_t EFIAPI efi_protocols_per_handle(void *handle,
*protocol_buffer = NULL;
*protocol_buffer_count = 0;
- list_for_each(lhandle, &efi_obj_list) {
- efiobj = list_entry(lhandle, struct efi_object, link);
- if (efiobj->handle != handle)
- continue;
+ efiobj = efi_search_obj(handle);
+ if (!efiobj)
+ return EFI_EXIT(EFI_INVALID_PARAMETER);
- /* Count protocols */
- for (i = 0; i < ARRAY_SIZE(efiobj->protocols); i++) {
- if (efiobj->protocols[i].guid)
- ++*protocol_buffer_count;
- }
- /* Copy guids */
- if (*protocol_buffer_count) {
- buffer_size = sizeof(efi_guid_t *) *
- *protocol_buffer_count;
- r = efi_allocate_pool(EFI_ALLOCATE_ANY_PAGES,
- buffer_size,
- (void **)protocol_buffer);
- if (r != EFI_SUCCESS)
- return EFI_EXIT(r);
- j = 0;
- for (i = 0; i < ARRAY_SIZE(efiobj->protocols); ++i) {
- if (efiobj->protocols[i].guid) {
- (*protocol_buffer)[j] = (void *)
- efiobj->protocols[i].guid;
- ++j;
- }
- }
+ /* Count protocols */
+ list_for_each(protocol_handle, &efiobj->protocols) {
+ ++*protocol_buffer_count;
+ }
+
+ /* Copy guids */
+ if (*protocol_buffer_count) {
+ size_t j = 0;
+
+ buffer_size = sizeof(efi_guid_t *) * *protocol_buffer_count;
+ r = efi_allocate_pool(EFI_ALLOCATE_ANY_PAGES, buffer_size,
+ (void **)protocol_buffer);
+ if (r != EFI_SUCCESS)
+ return EFI_EXIT(r);
+ list_for_each(protocol_handle, &efiobj->protocols) {
+ struct efi_handler *protocol;
+
+ protocol = list_entry(protocol_handle,
+ struct efi_handler, link);
+ (*protocol_buffer)[j] = (void *)protocol->guid;
+ ++j;
}
- break;
}
return EFI_EXIT(EFI_SUCCESS);
diff --git a/lib/efi_loader/efi_disk.c b/lib/efi_loader/efi_disk.c
index 1d6cf3122f..af8db40e19 100644
--- a/lib/efi_loader/efi_disk.c
+++ b/lib/efi_loader/efi_disk.c
@@ -224,6 +224,7 @@ static void efi_disk_add_dev(const char *name,
goto out_of_memory;
/* Hook up to the device list */
+ INIT_LIST_HEAD(&diskobj->parent.protocols);
list_add_tail(&diskobj->parent.link, &efi_obj_list);
/* Fill in object data */
diff --git a/lib/efi_loader/efi_gop.c b/lib/efi_loader/efi_gop.c
index 7b74d6ef33..498184d754 100644
--- a/lib/efi_loader/efi_gop.c
+++ b/lib/efi_loader/efi_gop.c
@@ -180,6 +180,7 @@ int efi_gop_register(void)
}
/* Hook up to the device list */
+ INIT_LIST_HEAD(&gopobj->parent.protocols);
list_add_tail(&gopobj->parent.link, &efi_obj_list);
/* Fill in object data */
diff --git a/lib/efi_loader/efi_net.c b/lib/efi_loader/efi_net.c
index 8b2f682351..74a67c5365 100644
--- a/lib/efi_loader/efi_net.c
+++ b/lib/efi_loader/efi_net.c
@@ -296,6 +296,7 @@ int efi_net_register(void)
goto out_of_memory;
/* Hook net up to the device list */
+ INIT_LIST_HEAD(&netobj->parent.protocols);
list_add_tail(&netobj->parent.link, &efi_obj_list);
/* Fill in object data */
--
2.14.2
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