net: Make the netconsole buffer size configurable

Allow a board to configure a larger buffer for netconsole, but leave the default. Signed-off-by: Joe Hershberger <joe.hershberger@ni.com> Cc: Mike Frysinger <vapier@gentoo.org> Acked-by: Mike Frysinger <vapier@gentoo.org>

net: Make the netconsole buffer size configurable
Allow a board to configure a larger buffer for netconsole, but leave the default. Signed-off-by: Joe Hershberger <joe.hershberger@ni.com> Cc: Mike Frysinger <vapier@gentoo.org> Acked-by: Mike Frysinger <vapier@gentoo.org>
Joe Hershberger
1 parent dcd5a593f5
Showing 2 changed files with 8 additions and 2 deletions Side-by-side Diff
doc/README.NetConsole
drivers/net/netconsole.c
@@ -6,6 +6,8 @@
 set either of these variables to "nc". Input and output can be
 switched independently.
  
+CONFIG_NETCONSOLE_BUFFER_SIZE - Override the default buffer size
+
 We use an environment variable 'ncip' to set the IP address and the
 port of the destination. The format is <ip_addr>:<port>. If <port> is
 omitted, the value of 6666 is used. If the env var doesn't exist, the
@@ -28,7 +28,11 @@
  
 DECLARE_GLOBAL_DATA_PTR;
  
-static char input_buffer[512];
+#ifndef CONFIG_NETCONSOLE_BUFFER_SIZE
+#define CONFIG_NETCONSOLE_BUFFER_SIZE 512
+#endif
+
+static char input_buffer[CONFIG_NETCONSOLE_BUFFER_SIZE];
 static int input_size; /* char count in input buffer */
 static int input_offset; /* offset to valid chars in input buffer */
 static int input_recursion;
@@ -214,7 +218,7 @@
  
 	len = strlen(s);
 	while (len) {
-		int send_len = min(len, 512);
+		int send_len = min(len, sizeof(input_buffer));
 		nc_send_packet(s, send_len);
 		len -= send_len;
 		s += send_len;
...	...	@@ -6,6 +6,8 @@
6	6	set either of these variables to "nc". Input and output can be
7	7	switched independently.
8	8
	9	+CONFIG_NETCONSOLE_BUFFER_SIZE - Override the default buffer size
	10	+
9	11	We use an environment variable 'ncip' to set the IP address and the
10	12	port of the destination. The format is <ip_addr>:<port>. If <port> is
11	13	omitted, the value of 6666 is used. If the env var doesn't exist, the
...	...	@@ -28,7 +28,11 @@
28	28
29	29	DECLARE_GLOBAL_DATA_PTR;
30	30
31		-static char input_buffer[512];
	31	+#ifndef CONFIG_NETCONSOLE_BUFFER_SIZE
	32	+#define CONFIG_NETCONSOLE_BUFFER_SIZE 512
	33	+#endif
	34	+
	35	+static char input_buffer[CONFIG_NETCONSOLE_BUFFER_SIZE];
32	36	static int input_size; /* char count in input buffer */
33	37	static int input_offset; /* offset to valid chars in input buffer */
34	38	static int input_recursion;
...	...	@@ -214,7 +218,7 @@
214	218
215	219	len = strlen(s);
216	220	while (len) {
217		- int send_len = min(len, 512);
	221	+ int send_len = min(len, sizeof(input_buffer));
218	222	nc_send_packet(s, send_len);
219	223	len -= send_len;
220	224	s += send_len;