[PATCH 21/39] net: Refactor part of netboot_common() into a function

[Simon Glass]

Move the core code for starting an netboot operation into a separate
function, so that we can (with additional work) move towards calling it
from outside the file.

Signed-off-by: Simon Glass <sjg at chromium.org>
---

 cmd/net.c | 62 +++++++++++++++++++++++++++++++++++++++++--------------
 1 file changed, 46 insertions(+), 16 deletions(-)

diff --git a/cmd/net.c b/cmd/net.c
index 8bb8604faf6..f1b520143df 100644
--- a/cmd/net.c
+++ b/cmd/net.c
@@ -380,11 +380,50 @@ static int parse_args(enum proto_t proto, int argc, char *const argv[],
 	return 0;
 }
 
+static int netboot_run_(enum proto_t proto, ulong addr, const char *fname,
+			ulong size, bool fname_explicit, bool ipv6)
+{
+	int ret;
+
+	bootstage_mark(BOOTSTAGE_ID_NET_START);
+
+	/*
+	 * For now we use the global variables as that is the only way to
+	 * control the network stack. At some point, perhaps, the state could be
+	 * in a struct
+	 */
+	if (IS_ENABLED(CONFIG_CMD_TFTPPUT) && proto == TFTPPUT)
+		image_save_addr = addr;
+	else
+		image_load_addr = addr;
+
+	net_boot_file_name_explicit = fname_explicit;
+	copy_filename(net_boot_file_name, fname, sizeof(net_boot_file_name));
+	if (IS_ENABLED(CONFIG_IPV6))
+		use_ip6 = ipv6;
+	if (IS_ENABLED(CONFIG_CMD_TFTPPUT) && proto == TFTPPUT) {
+		image_save_addr = addr;
+		image_save_size = size;
+	} else {
+		image_load_addr = addr;
+	}
+
+	ret = net_loop(proto);
+	if (ret < 0) {
+		bootstage_error(BOOTSTAGE_ID_NET_NETLOOP_OK);
+		return ret;
+	}
+	bootstage_mark(BOOTSTAGE_ID_NET_NETLOOP_OK);
+
+	return 0;
+}
+
 static int netboot_common(enum proto_t proto, struct cmd_tbl *cmdtp, int argc,
 			  char *const argv[])
 {
+	ulong addr, save_size;
+	bool fname_explicit;
 	const char *fname;
-	ulong addr;
 	char *s;
 	int   rcode = 0;
 	int   size;
@@ -408,22 +447,17 @@ static int netboot_common(enum proto_t proto, struct cmd_tbl *cmdtp, int argc,
 		}
 	}
 
-	if (parse_args(proto, argc, argv, &fname, &addr, &image_save_size)) {
+	if (parse_args(proto, argc, argv, &fname, &addr, &save_size)) {
 		bootstage_error(BOOTSTAGE_ID_NET_START);
 		return CMD_RET_USAGE;
 	}
-	if (IS_ENABLED(CONFIG_CMD_TFTPPUT) && proto == TFTPPUT)
-		image_save_addr = addr;
-	else
-		image_load_addr = addr;
 
 	if (fname) {
-		net_boot_file_name_explicit = true;
+		fname_explicit = true;
 	} else {
-		net_boot_file_name_explicit = false;
+		fname_explicit = false;
 		fname = env_get("bootfile");
 	}
-	copy_filename(net_boot_file_name, fname, sizeof(net_boot_file_name));
 
 	if (IS_ENABLED(CONFIG_IPV6) && !use_ip6) {
 		char *s, *e;
@@ -438,14 +472,10 @@ static int netboot_common(enum proto_t proto, struct cmd_tbl *cmdtp, int argc,
 		}
 	}
 
-	bootstage_mark(BOOTSTAGE_ID_NET_START);
-
-	size = net_loop(proto);
-	if (size < 0) {
-		bootstage_error(BOOTSTAGE_ID_NET_NETLOOP_OK);
+	size = netboot_run_(proto, addr, fname, save_size, fname_explicit,
+			    use_ip6);
+	if (size < 0)
 		return CMD_RET_FAILURE;
-	}
-	bootstage_mark(BOOTSTAGE_ID_NET_NETLOOP_OK);
 
 	/* net_loop ok, update environment */
 	netboot_update_env();
-- 
2.34.1