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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>
utp
Joe Hershberger 2012-07-31 06:09:17 +00:00
parent dcd5a593f5
commit 2c8fe5120f
2 changed files with 8 additions and 2 deletions
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2
doc/README.NetConsole
View File

@ -6,6 +6,8 @@ serial and network input/output devices by adjusting the 'stdin' and
set either of these variables to "nc". Input and output can be set either of these variables to "nc". Input and output can be
switched independently. switched independently.
CONFIG_NETCONSOLE_BUFFER_SIZE - Override the default buffer size
We use an environment variable 'ncip' to set the IP address and the 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 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 omitted, the value of 6666 is used. If the env var doesn't exist, the

8
drivers/net/netconsole.c
View File

@ -28,7 +28,11 @@
DECLARE_GLOBAL_DATA_PTR; 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_size; /* char count in input buffer */
static int input_offset; /* offset to valid chars in input buffer */ static int input_offset; /* offset to valid chars in input buffer */
static int input_recursion; static int input_recursion;
@ -214,7 +218,7 @@ static void nc_puts(const char *s)
len = strlen(s); len = strlen(s);
while (len) { while (len) {
int send_len = min(len, 512); int send_len = min(len, sizeof(input_buffer));
nc_send_packet(s, send_len); nc_send_packet(s, send_len);
len -= send_len; len -= send_len;
s += send_len; s += send_len;