tipc: Add support for "-s" configuration option

Provide initial support for displaying overall TIPC status/statistics
information at runtime.  Currently, only version info for the TIPC
kernel module is displayed.

Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 42 insertions, 3 deletions

diff --git a/net/tipc/config.c b/net/tipc/config.c
index 7370241412cb..961d1b097146 100644
--- a/net/tipc/config.c
+++ b/net/tipc/config.c
@@ -246,13 +246,48 @@ static void cfg_cmd_event(struct tipc_cmd_msg *msg,
         default:
                 rv = tipc_cfg_cmd(msg, data, sz, (u32 *)&msg_sect[1].iov_len, orig);
         }
-        exit:
+exit:
         rmsg.result_len = htonl(msg_sect[1].iov_len);
         rmsg.retval = htonl(rv);
         tipc_cfg_respond(msg_sect, 2u, orig);
 }
 #endif
 
+#define MAX_STATS_INFO 2000
+
+static struct sk_buff *tipc_show_stats(void)
+{
+        struct sk_buff *buf;
+        struct tlv_desc *rep_tlv;
+        struct print_buf pb;
+        int str_len;
+        u32 value;
+
+        if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED))
+                return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
+
+        value = ntohl(*(u32 *)TLV_DATA(req_tlv_area));
+        if (value != 0)
+                return tipc_cfg_reply_error_string("unsupported argument");
+
+        buf = tipc_cfg_reply_alloc(TLV_SPACE(MAX_STATS_INFO));
+        if (buf == NULL)
+                return NULL;
+
+        rep_tlv = (struct tlv_desc *)buf->data;
+        tipc_printbuf_init(&pb, (char *)TLV_DATA(rep_tlv), MAX_STATS_INFO);
+
+        tipc_printf(&pb, "TIPC version " TIPC_MOD_VER "\n");
+
+        /* Use additional tipc_printf()'s to return more info ... */
+
+        str_len = tipc_printbuf_validate(&pb);
+        skb_put(buf, TLV_SPACE(str_len));
+        TLV_SET(rep_tlv, TIPC_TLV_ULTRA_STRING, NULL, str_len);
+
+        return buf;
+}
+
 static struct sk_buff *cfg_enable_bearer(void)
 {
         struct tipc_bearer_config *args;
@@ -536,6 +571,9 @@ struct sk_buff *tipc_cfg_do_cmd(u32 orig_node, u16 cmd, const void *request_area
         case TIPC_CMD_DUMP_LOG:
                 rep_tlv_buf = tipc_log_dump();
                 break;
+        case TIPC_CMD_SHOW_STATS:
+                rep_tlv_buf = tipc_show_stats();
+                break;
         case TIPC_CMD_SET_LINK_TOL:
         case TIPC_CMD_SET_LINK_PRI:
         case TIPC_CMD_SET_LINK_WINDOW:
diff --git a/net/tipc/core.c b/net/tipc/core.c
index 4e84c8431f32..b47d1842a970 100644
--- a/net/tipc/core.c
+++ b/net/tipc/core.c
@@ -49,8 +49,6 @@
 #include "config.h"
 
 
-#define TIPC_MOD_VER "2.0.0"
-
 #ifndef CONFIG_TIPC_ZONES
 #define CONFIG_TIPC_ZONES 3
 #endif
diff --git a/net/tipc/core.h b/net/tipc/core.h
index c58a1d16563a..1e149f55f3e2 100644
--- a/net/tipc/core.h
+++ b/net/tipc/core.h
@@ -59,6 +59,9 @@
 #include <linux/slab.h>
 #include <linux/vmalloc.h>
 
+
+#define TIPC_MOD_VER "2.0.0"
+
 /*
  * TIPC sanity test macros
  */