tipc: Provide feedback when log buffer resizing fails
This patch provides feedback to the user when TIPC is unable
to set its log buffer to the requested size.
Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/tipc/dbg.c b/net/tipc/dbg.c
index 1a8d0a2..c680691 100644
--- a/net/tipc/dbg.c
+++ b/net/tipc/dbg.c
@@ -2,7 +2,7 @@
* net/tipc/dbg.c: TIPC print buffer routines for debugging
*
* Copyright (c) 1996-2006, Ericsson AB
- * Copyright (c) 2005-2006, Wind River Systems
+ * Copyright (c) 2005-2007, Wind River Systems
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@@ -354,8 +354,10 @@
* @log_size: print buffer size to use
*/
-void tipc_log_resize(int log_size)
+int tipc_log_resize(int log_size)
{
+ int res = 0;
+
spin_lock_bh(&print_lock);
if (TIPC_LOG->buf) {
kfree(TIPC_LOG->buf);
@@ -366,8 +368,11 @@
log_size = TIPC_PB_MIN_SIZE;
tipc_printbuf_init(TIPC_LOG, kmalloc(log_size, GFP_ATOMIC),
log_size);
+ res = !TIPC_LOG->buf;
}
spin_unlock_bh(&print_lock);
+
+ return res;
}
/**
@@ -385,7 +390,9 @@
if (value != delimit(value, 0, 32768))
return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE
" (log size must be 0-32768)");
- tipc_log_resize(value);
+ if (tipc_log_resize(value))
+ return tipc_cfg_reply_error_string(
+ "unable to create specified log (log size is now 0)");
return tipc_cfg_reply_none();
}
diff --git a/net/tipc/dbg.h b/net/tipc/dbg.h
index 718a5db..6b00062 100644
--- a/net/tipc/dbg.h
+++ b/net/tipc/dbg.h
@@ -2,7 +2,7 @@
* net/tipc/dbg.h: Include file for TIPC print buffer routines
*
* Copyright (c) 1997-2006, Ericsson AB
- * Copyright (c) 2005-2006, Wind River Systems
+ * Copyright (c) 2005-2007, Wind River Systems
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@@ -61,7 +61,7 @@
int tipc_printbuf_validate(struct print_buf *pb);
void tipc_printbuf_move(struct print_buf *pb_to, struct print_buf *pb_from);
-void tipc_log_resize(int log_size);
+int tipc_log_resize(int log_size);
struct sk_buff *tipc_log_resize_cmd(const void *req_tlv_area,
int req_tlv_space);