From 3c6952624a8f600f9a0fbc1f5db5560a7ef9b13e Mon Sep 17 00:00:00 2001 From: Gerrit Renker Date: Wed, 15 Nov 2006 21:27:47 -0200 Subject: [PATCH] [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 Signed-off-by: Arnaldo Carvalho de Melo --- net/dccp/ccids/ccid3.c | 45 +++++++++++------------------------------- net/dccp/ccids/ccid3.h | 19 ++++++++++++++++-- net/dccp/dccp.h | 8 ++++++++ 3 files changed, 37 insertions(+), 35 deletions(-) diff --git a/net/dccp/ccids/ccid3.c b/net/dccp/ccids/ccid3.c index cec23ad286de..2fa0c6d1fbee 100644 --- a/net/dccp/ccids/ccid3.c +++ b/net/dccp/ccids/ccid3.c @@ -75,14 +75,6 @@ static struct dccp_tx_hist *ccid3_tx_hist; 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 @@ static void ccid3_hc_tx_no_feedback_timer(unsigned long data) 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 @@ static int ccid3_hc_tx_send_packet(struct sock *sk, 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 @@ static void ccid3_hc_tx_packet_sent(struct sock *sk, int more, int len) } 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 @@ static void ccid3_hc_tx_packet_recv(struct sock *sk, struct sk_buff *skb) 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 @@ static void ccid3_hc_tx_exit(struct sock *sk) * 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 @@ static void ccid3_hc_rx_send_feedback(struct sock *sk) } 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 @@ static void ccid3_hc_rx_packet_recv(struct sock *sk, struct sk_buff *skb) } 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 0a2cb7536d26..c122e757eb7f 100644 --- a/net/dccp/ccids/ccid3.h +++ b/net/dccp/ccids/ccid3.h @@ -73,6 +73,14 @@ struct ccid3_options_received { 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 @@ struct ccid3_hc_tx_sock { #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_hc_tx_sock { 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 @@ struct ccid3_hc_rx_sock { #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 363fa520056e..ecb4e7bd1a84 100644 --- a/net/dccp/dccp.h +++ b/net/dccp/dccp.h @@ -18,6 +18,14 @@ #include #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; -- 2.30.2