[DCCP]: Introduce DCCP_{BUG{_ON},CRIT} macros, use enum:8 for the ccid3 states
This patch tackles the following problem:
* the ccid3_hc_{t,r}x_sock define ccid3hc{t,r}x_state as `u8', but
in reality there can only be a few, pre-defined enum names
* this necessitates addiditional checking for unexpected values
which would otherwise be caught by the compiler
Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
diff --git a/net/dccp/ccids/ccid3.c b/net/dccp/ccids/ccid3.c
index cec23ad..2fa0c6d 100644
--- a/net/dccp/ccids/ccid3.c
+++ b/net/dccp/ccids/ccid3.c
@@ -75,14 +75,6 @@
static struct dccp_rx_hist *ccid3_rx_hist;
static struct dccp_li_hist *ccid3_li_hist;
-/* TFRC sender states */
-enum ccid3_hc_tx_states {
- TFRC_SSTATE_NO_SENT = 1,
- TFRC_SSTATE_NO_FBACK,
- TFRC_SSTATE_FBACK,
- TFRC_SSTATE_TERM,
-};
-
#ifdef CCID3_DEBUG
static const char *ccid3_tx_state_name(enum ccid3_hc_tx_states state)
{
@@ -251,9 +243,8 @@
hctx->ccid3hctx_x));
break;
default:
- printk(KERN_CRIT "%s: %s, sk=%p, Illegal state (%d)!\n",
- __FUNCTION__, dccp_role(sk), sk, hctx->ccid3hctx_state);
- dump_stack();
+ DCCP_BUG("%s, sk=%p, Illegal state (%d)!", dccp_role(sk), sk,
+ hctx->ccid3hctx_state);
goto out;
}
@@ -329,9 +320,8 @@
rc = delay > 0 ? delay : 0;
break;
default:
- printk(KERN_CRIT "%s: %s, sk=%p, Illegal state (%d)!\n",
- __FUNCTION__, dccp_role(sk), sk, hctx->ccid3hctx_state);
- dump_stack();
+ DCCP_BUG("%s, sk=%p, Illegal state (%d)!", dccp_role(sk), sk,
+ hctx->ccid3hctx_state);
rc = -EINVAL;
break;
}
@@ -423,9 +413,8 @@
}
break;
default:
- printk(KERN_CRIT "%s: %s, sk=%p, Illegal state (%d)!\n",
- __FUNCTION__, dccp_role(sk), sk, hctx->ccid3hctx_state);
- dump_stack();
+ DCCP_BUG("%s, sk=%p, Illegal state (%d)!", dccp_role(sk), sk,
+ hctx->ccid3hctx_state);
break;
}
}
@@ -568,9 +557,8 @@
hctx->ccid3hctx_idle = 1;
break;
default:
- printk(KERN_CRIT "%s: %s, sk=%p, Illegal state (%d)!\n",
- __FUNCTION__, dccp_role(sk), sk, hctx->ccid3hctx_state);
- dump_stack();
+ DCCP_BUG("%s, sk=%p, Illegal state (%d)!", dccp_role(sk), sk,
+ hctx->ccid3hctx_state);
break;
}
}
@@ -688,13 +676,6 @@
* RX Half Connection methods
*/
-/* TFRC receiver states */
-enum ccid3_hc_rx_states {
- TFRC_RSTATE_NO_DATA = 1,
- TFRC_RSTATE_DATA,
- TFRC_RSTATE_TERM = 127,
-};
-
#ifdef CCID3_DEBUG
static const char *ccid3_rx_state_name(enum ccid3_hc_rx_states state)
{
@@ -744,9 +725,8 @@
}
break;
default:
- printk(KERN_CRIT "%s: %s, sk=%p, Illegal state (%d)!\n",
- __FUNCTION__, dccp_role(sk), sk, hcrx->ccid3hcrx_state);
- dump_stack();
+ DCCP_BUG("%s, sk=%p, Illegal state (%d)!", dccp_role(sk), sk,
+ hcrx->ccid3hcrx_state);
return;
}
@@ -1088,9 +1068,8 @@
}
return;
default:
- printk(KERN_CRIT "%s: %s, sk=%p, Illegal state (%d)!\n",
- __FUNCTION__, dccp_role(sk), sk, hcrx->ccid3hcrx_state);
- dump_stack();
+ DCCP_BUG("%s, sk=%p, Illegal state (%d)!", dccp_role(sk), sk,
+ hcrx->ccid3hcrx_state);
return;
}
diff --git a/net/dccp/ccids/ccid3.h b/net/dccp/ccids/ccid3.h
index 0a2cb75..c122e75 100644
--- a/net/dccp/ccids/ccid3.h
+++ b/net/dccp/ccids/ccid3.h
@@ -73,6 +73,14 @@
u32 ccid3or_receive_rate;
};
+/* TFRC sender states */
+enum ccid3_hc_tx_states {
+ TFRC_SSTATE_NO_SENT = 1,
+ TFRC_SSTATE_NO_FBACK,
+ TFRC_SSTATE_FBACK,
+ TFRC_SSTATE_TERM,
+};
+
/** struct ccid3_hc_tx_sock - CCID3 sender half connection sock
*
* @ccid3hctx_state - Sender state
@@ -103,7 +111,7 @@
#define ccid3hctx_t_rto ccid3hctx_tfrc.tfrctx_rto
#define ccid3hctx_t_ipi ccid3hctx_tfrc.tfrctx_ipi
u16 ccid3hctx_s;
- u8 ccid3hctx_state;
+ enum ccid3_hc_tx_states ccid3hctx_state:8;
u8 ccid3hctx_last_win_count;
u8 ccid3hctx_idle;
struct timeval ccid3hctx_t_last_win_count;
@@ -115,6 +123,13 @@
struct ccid3_options_received ccid3hctx_options_received;
};
+/* TFRC receiver states */
+enum ccid3_hc_rx_states {
+ TFRC_RSTATE_NO_DATA = 1,
+ TFRC_RSTATE_DATA,
+ TFRC_RSTATE_TERM = 127,
+};
+
struct ccid3_hc_rx_sock {
struct tfrc_rx_info ccid3hcrx_tfrc;
#define ccid3hcrx_x_recv ccid3hcrx_tfrc.tfrcrx_x_recv
@@ -122,8 +137,8 @@
#define ccid3hcrx_p ccid3hcrx_tfrc.tfrcrx_p
u64 ccid3hcrx_seqno_nonloss:48,
ccid3hcrx_ccval_nonloss:4,
- ccid3hcrx_state:8,
ccid3hcrx_ccval_last_counter:4;
+ enum ccid3_hc_rx_states ccid3hcrx_state:8;
u32 ccid3hcrx_bytes_recv;
struct timeval ccid3hcrx_tstamp_last_feedback;
struct timeval ccid3hcrx_tstamp_last_ack;
diff --git a/net/dccp/dccp.h b/net/dccp/dccp.h
index 363fa52..ecb4e7b 100644
--- a/net/dccp/dccp.h
+++ b/net/dccp/dccp.h
@@ -18,6 +18,14 @@
#include <net/tcp.h>
#include "ackvec.h"
+#define DCCP_CRIT(fmt, a...) LIMIT_NETDEBUG(KERN_CRIT fmt " at %s:%d/%s()\n", \
+ ##a, __FILE__, __LINE__, __FUNCTION__)
+#define DCCP_BUG(fmt, a...) do { DCCP_CRIT(fmt, ##a); dump_stack(); } while (0)
+#define DCCP_BUG_ON(cond) do { if (unlikely((cond) == 0)) \
+ DCCP_BUG("BUG: condition \"%s\" fails",\
+ __stringify((cond))); \
+ } while (0)
+
#ifdef CONFIG_IP_DCCP_DEBUG
extern int dccp_debug;