[PATCH 09/15] efi_loader: net: set EFI bootdevice device path to HTTP when loaded from wget

[Adriano Cordova]

Set the device path of the efi boot device to an HTTP device path
(as formed by efi_dp_from_http) when the next boot stage is loaded
using wget (i.e., when wget is used with wget_info.set_bootdev=1).

Signed-off-by: Adriano Cordova <adrianox at gmail.com>
---
 include/efi_loader.h             |  6 ++++++
 lib/efi_loader/efi_device_path.c |  2 +-
 lib/efi_loader/efi_net.c         | 22 +++++++++++++++++++++-
 net/lwip/wget.c                  |  1 +
 net/wget.c                       |  1 +
 5 files changed, 30 insertions(+), 2 deletions(-)

diff --git a/include/efi_loader.h b/include/efi_loader.h
index ab79364857..c37c1a4660 100644
--- a/include/efi_loader.h
+++ b/include/efi_loader.h
@@ -126,6 +126,10 @@ static inline void efi_set_bootdev(const char *dev, const char *devnr,
 #endif
 
 #if CONFIG_IS_ENABLED(NETDEVICES) && CONFIG_IS_ENABLED(EFI_LOADER)
+/* Call this to update the current device path of the efi net device */
+void efi_net_set_dp(const char *dev, const char *server);
+/* Call this to get the current device path of the efi net device */
+void efi_net_get_dp(void **dp);
 void efi_net_get_addr(struct efi_ipv4_address *ip,
 		      struct efi_ipv4_address *mask,
 		      struct efi_ipv4_address *gw);
@@ -133,6 +137,8 @@ void efi_net_set_addr(struct efi_ipv4_address *ip,
 		      struct efi_ipv4_address *mask,
 		      struct efi_ipv4_address *gw);
 #else
+static inline void efi_net_set_dp(const char *dev, const char *server) { }
+static inline void efi_net_get_dp(void **dp) { }
 static inline void efi_net_get_addr(struct efi_ipv4_address *ip,
 				     struct efi_ipv4_address *mask,
 				     struct efi_ipv4_address *gw) { }
diff --git a/lib/efi_loader/efi_device_path.c b/lib/efi_loader/efi_device_path.c
index dc79a61196..d7c874fcdf 100644
--- a/lib/efi_loader/efi_device_path.c
+++ b/lib/efi_loader/efi_device_path.c
@@ -1165,7 +1165,7 @@ efi_status_t efi_dp_from_name(const char *dev, const char *devnr,
 				     (uintptr_t)image_addr,
 				     (uintptr_t)image_addr + image_size);
 	} else if (IS_ENABLED(CONFIG_NETDEVICES) && !strcmp(dev, "Net")) {
-		dp = efi_dp_from_eth();
+		efi_net_get_dp((void **)&dp);
 	} else if (!strcmp(dev, "Uart")) {
 		dp = efi_dp_from_uart();
 	} else {
diff --git a/lib/efi_loader/efi_net.c b/lib/efi_loader/efi_net.c
index dd84b3f18d..d4570d4d7c 100644
--- a/lib/efi_loader/efi_net.c
+++ b/lib/efi_loader/efi_net.c
@@ -16,6 +16,7 @@
  */
 
 #include <efi_loader.h>
+#include <dm.h>
 #include <malloc.h>
 #include <vsprintf.h>
 #include <net.h>
@@ -31,6 +32,7 @@ static size_t *receive_lengths;
 static int rx_packet_idx;
 static int rx_packet_num;
 static struct efi_net_obj *netobj;
+static struct efi_device_path *net_dp;
 
 /*
  * The notification function of this event is called in every timer cycle
@@ -902,8 +904,10 @@ efi_status_t efi_net_register(void)
 			     &netobj->net);
 	if (r != EFI_SUCCESS)
 		goto failure_to_add_protocol;
+	if (!net_dp)
+		efi_net_set_dp("Net", NULL);
 	r = efi_add_protocol(&netobj->header, &efi_guid_device_path,
-			     efi_dp_from_eth());
+			     net_dp);
 	if (r != EFI_SUCCESS)
 		goto failure_to_add_protocol;
 	r = efi_add_protocol(&netobj->header, &efi_pxe_base_code_protocol_guid,
@@ -999,6 +1003,22 @@ out_of_resources:
 	return EFI_OUT_OF_RESOURCES;
 }
 
+void efi_net_set_dp(const char *dev, const char *server)
+{
+	if (!strcmp(dev, "Net"))
+		net_dp = efi_dp_from_eth();
+	else if (!strcmp(dev, "Http"))
+		net_dp = efi_dp_from_http(server);
+}
+
+void efi_net_get_dp(void **dp)
+{
+	if (!net_dp)
+		efi_net_set_dp("Net", NULL);
+	if (dp && net_dp)
+		*dp = efi_dp_dup(net_dp);
+}
+
 void efi_net_get_addr(struct efi_ipv4_address *ip,
 		      struct efi_ipv4_address *mask,
 		      struct efi_ipv4_address *gw)
diff --git a/net/lwip/wget.c b/net/lwip/wget.c
index 88ce906930..64593d135d 100644
--- a/net/lwip/wget.c
+++ b/net/lwip/wget.c
@@ -218,6 +218,7 @@ static void httpc_result_cb(void *arg, httpc_result_t httpc_result,
 	print_size(rx_content_len / elapsed * 1000, "/s)\n");
 	printf("Bytes transferred = %lu (%lx hex)\n", ctx->size, ctx->size);
 	if (wget_info.set_bootdev) {
+		efi_net_set_dp("Http", ctx->server_name);
 		efi_set_bootdev("Net", "", ctx->path, map_sysmem(ctx->saved_daddr, 0),
 				rx_content_len);
 	}
diff --git a/net/wget.c b/net/wget.c
index 5bb61a2b8d..3cd9a57647 100644
--- a/net/wget.c
+++ b/net/wget.c
@@ -443,6 +443,7 @@ static void wget_handler(uchar *pkt, u16 dport,
 		net_set_state(wget_loop_state);
 		wget_info.file_size = net_boot_file_size;
 		if (wget_info.method == WGET_HTTP_METHOD_GET && wget_info.set_bootdev) {
+			efi_net_set_dp("Http", NULL);
 			efi_set_bootdev("Net", "", image_url,
 					map_sysmem(image_load_addr, 0),
 					net_boot_file_size);
-- 
2.43.0