[DCCP]: Simplified conditions due to use of enum:8 states

This reaps the benefit of the earlier patch, which changed the type of
CCID 3 states to use enums, in that many conditions are now simplified
and the number of possible (unexpected) values is greatly reduced.

In a few instances, this also allowed to simplify pre-conditions; where
care has been taken to retain logical equivalence.

[DCCP]: Introduce a consistent BUG/WARN message scheme

This refines the existing set of DCCP messages so that
 * BUG(), BUG_ON(), WARN_ON() have meaningful DCCP-specific counterparts
 * DCCP_CRIT (for severe warnings) is not rate-limited
 * DCCP_WARN() is introduced as rate-limited wrapper

Using these allows a faster and cleaner transition to their original
counterparts once the code has matured into a full DCCP implementation.

Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
This commit is contained in:
Gerrit Renker 2006-11-20 18:39:23 -02:00 committed by David S. Miller
parent b1308dc015
commit 59348b19ef
14 changed files with 115 additions and 156 deletions

View file

@ -461,9 +461,6 @@ int dccp_ackvec_parse(struct sock *sk, const struct sk_buff *skb,
return 0;
}
static char dccp_ackvec_slab_msg[] __initdata =
KERN_CRIT "DCCP: Unable to create ack vectors slab caches\n";
int __init dccp_ackvec_init(void)
{
dccp_ackvec_slab = kmem_cache_create("dccp_ackvec",
@ -485,7 +482,7 @@ int __init dccp_ackvec_init(void)
kmem_cache_destroy(dccp_ackvec_slab);
dccp_ackvec_slab = NULL;
out_err:
printk(dccp_ackvec_slab_msg);
DCCP_CRIT("Unable to create Ack Vector slab cache");
return -ENOBUFS;
}

View file

@ -420,7 +420,7 @@ static int ccid2_ackvector(struct sock *sk, struct sk_buff *skb, int offset,
return -1;
out_invalid_option:
BUG_ON(1); /* should never happen... options were previously parsed ! */
DCCP_BUG("Invalid option - this should not happen (previous parsing)!");
return -1;
}

View file

@ -176,8 +176,6 @@ static void ccid3_hc_tx_no_feedback_timer(unsigned long data)
ccid3_tx_state_name(hctx->ccid3hctx_state));
switch (hctx->ccid3hctx_state) {
case TFRC_SSTATE_TERM:
goto out;
case TFRC_SSTATE_NO_FBACK:
/* Halve send rate */
hctx->ccid3hctx_x /= 2;
@ -240,9 +238,10 @@ static void ccid3_hc_tx_no_feedback_timer(unsigned long data)
2 * usecs_div(hctx->ccid3hctx_s,
hctx->ccid3hctx_x));
break;
default:
DCCP_BUG("%s, sk=%p, Illegal state (%d)!", dccp_role(sk), sk,
hctx->ccid3hctx_state);
case TFRC_SSTATE_NO_SENT:
DCCP_BUG("Illegal %s state NO_SENT, sk=%p", dccp_role(sk), sk);
/* fall through */
case TFRC_SSTATE_TERM:
goto out;
}
@ -264,7 +263,7 @@ static int ccid3_hc_tx_send_packet(struct sock *sk,
long delay;
int rc = -ENOTCONN;
BUG_ON(hctx == NULL || hctx->ccid3hctx_state == TFRC_SSTATE_TERM);
BUG_ON(hctx == NULL);
/* Check if pure ACK or Terminating*/
/*
@ -282,9 +281,8 @@ static int ccid3_hc_tx_send_packet(struct sock *sk,
rc = -ENOBUFS;
if (unlikely(new_packet == NULL)) {
LIMIT_NETDEBUG(KERN_WARNING "%s: %s, sk=%p, not enough "
"mem to add to history, send refused\n",
__FUNCTION__, dccp_role(sk), sk);
DCCP_WARN("%s, sk=%p, not enough mem to add to history,"
"send refused\n", dccp_role(sk), sk);
goto out;
}
@ -317,9 +315,8 @@ static int ccid3_hc_tx_send_packet(struct sock *sk,
/* divide by -1000 is to convert to ms and get sign right */
rc = delay > 0 ? delay : 0;
break;
default:
DCCP_BUG("%s, sk=%p, Illegal state (%d)!", dccp_role(sk), sk,
hctx->ccid3hctx_state);
case TFRC_SSTATE_TERM:
DCCP_BUG("Illegal %s state TERM, sk=%p", dccp_role(sk), sk);
rc = -EINVAL;
break;
}
@ -343,7 +340,7 @@ static void ccid3_hc_tx_packet_sent(struct sock *sk, int more, int len)
struct ccid3_hc_tx_sock *hctx = ccid3_hc_tx_sk(sk);
struct timeval now;
BUG_ON(hctx == NULL || hctx->ccid3hctx_state == TFRC_SSTATE_TERM);
BUG_ON(hctx == NULL);
dccp_timestamp(sk, &now);
@ -354,13 +351,11 @@ static void ccid3_hc_tx_packet_sent(struct sock *sk, int more, int len)
packet = dccp_tx_hist_head(&hctx->ccid3hctx_hist);
if (unlikely(packet == NULL)) {
LIMIT_NETDEBUG(KERN_WARNING "%s: packet doesn't "
"exists in history!\n", __FUNCTION__);
DCCP_WARN("packet doesn't exist in history!\n");
return;
}
if (unlikely(packet->dccphtx_sent)) {
LIMIT_NETDEBUG(KERN_WARNING "%s: no unsent packet in "
"history!\n", __FUNCTION__);
DCCP_WARN("no unsent packet in history!\n");
return;
}
packet->dccphtx_tstamp = now;
@ -395,9 +390,8 @@ static void ccid3_hc_tx_packet_sent(struct sock *sk, int more, int len)
case TFRC_SSTATE_NO_SENT:
/* if first wasn't pure ack */
if (len != 0)
printk(KERN_CRIT "%s: %s, First packet sent is noted "
"as a data packet\n",
__FUNCTION__, dccp_role(sk));
DCCP_CRIT("%s, First packet sent is noted "
"as a data packet", dccp_role(sk));
return;
case TFRC_SSTATE_NO_FBACK:
case TFRC_SSTATE_FBACK:
@ -410,9 +404,8 @@ static void ccid3_hc_tx_packet_sent(struct sock *sk, int more, int len)
hctx->ccid3hctx_t_ipi);
}
break;
default:
DCCP_BUG("%s, sk=%p, Illegal state (%d)!", dccp_role(sk), sk,
hctx->ccid3hctx_state);
case TFRC_SSTATE_TERM:
DCCP_BUG("Illegal %s state TERM, sk=%p", dccp_role(sk), sk);
break;
}
}
@ -430,7 +423,7 @@ static void ccid3_hc_tx_packet_recv(struct sock *sk, struct sk_buff *skb)
u32 x_recv;
u32 r_sample;
BUG_ON(hctx == NULL || hctx->ccid3hctx_state == TFRC_SSTATE_TERM);
BUG_ON(hctx == NULL);
/* we are only interested in ACKs */
if (!(DCCP_SKB_CB(skb)->dccpd_type == DCCP_PKT_ACK ||
@ -455,11 +448,10 @@ static void ccid3_hc_tx_packet_recv(struct sock *sk, struct sk_buff *skb)
packet = dccp_tx_hist_find_entry(&hctx->ccid3hctx_hist,
DCCP_SKB_CB(skb)->dccpd_ack_seq);
if (unlikely(packet == NULL)) {
LIMIT_NETDEBUG(KERN_WARNING "%s: %s, sk=%p, seqno "
"%llu(%s) does't exist in history!\n",
__FUNCTION__, dccp_role(sk), sk,
DCCP_WARN("%s, sk=%p, seqno %llu(%s) does't exist "
"in history!\n", dccp_role(sk), sk,
(unsigned long long)DCCP_SKB_CB(skb)->dccpd_ack_seq,
dccp_packet_name(DCCP_SKB_CB(skb)->dccpd_type));
dccp_packet_name(DCCP_SKB_CB(skb)->dccpd_type));
return;
}
@ -467,9 +459,8 @@ static void ccid3_hc_tx_packet_recv(struct sock *sk, struct sk_buff *skb)
dccp_timestamp(sk, &now);
r_sample = timeval_delta(&now, &packet->dccphtx_tstamp);
if (unlikely(r_sample <= t_elapsed))
LIMIT_NETDEBUG(KERN_WARNING "%s: r_sample=%uus, "
"t_elapsed=%uus\n",
__FUNCTION__, r_sample, t_elapsed);
DCCP_WARN("r_sample=%uus,t_elapsed=%uus\n",
r_sample, t_elapsed);
else
r_sample -= t_elapsed;
@ -554,9 +545,8 @@ static void ccid3_hc_tx_packet_recv(struct sock *sk, struct sk_buff *skb)
/* set idle flag */
hctx->ccid3hctx_idle = 1;
break;
default:
DCCP_BUG("%s, sk=%p, Illegal state (%d)!", dccp_role(sk), sk,
hctx->ccid3hctx_state);
case TFRC_SSTATE_TERM:
DCCP_BUG("Illegal %s state TERM, sk=%p", dccp_role(sk), sk);
break;
}
}
@ -596,9 +586,9 @@ static int ccid3_hc_tx_parse_options(struct sock *sk, unsigned char option,
switch (option) {
case TFRC_OPT_LOSS_EVENT_RATE:
if (unlikely(len != 4)) {
LIMIT_NETDEBUG(KERN_WARNING "%s: %s, sk=%p, invalid "
"len for TFRC_OPT_LOSS_EVENT_RATE\n",
__FUNCTION__, dccp_role(sk), sk);
DCCP_WARN("%s, sk=%p, invalid len %d "
"for TFRC_OPT_LOSS_EVENT_RATE\n",
dccp_role(sk), sk, len);
rc = -EINVAL;
} else {
opt_recv->ccid3or_loss_event_rate = ntohl(*(__be32 *)value);
@ -617,9 +607,9 @@ static int ccid3_hc_tx_parse_options(struct sock *sk, unsigned char option,
break;
case TFRC_OPT_RECEIVE_RATE:
if (unlikely(len != 4)) {
LIMIT_NETDEBUG(KERN_WARNING "%s: %s, sk=%p, invalid "
"len for TFRC_OPT_RECEIVE_RATE\n",
__FUNCTION__, dccp_role(sk), sk);
DCCP_WARN("%s, sk=%p, invalid len %d "
"for TFRC_OPT_RECEIVE_RATE\n",
dccp_role(sk), sk, len);
rc = -EINVAL;
} else {
opt_recv->ccid3or_receive_rate = ntohl(*(__be32 *)value);
@ -722,17 +712,15 @@ static void ccid3_hc_rx_send_feedback(struct sock *sk)
delta);
}
break;
default:
DCCP_BUG("%s, sk=%p, Illegal state (%d)!", dccp_role(sk), sk,
hcrx->ccid3hcrx_state);
case TFRC_RSTATE_TERM:
DCCP_BUG("Illegal %s state TERM, sk=%p", dccp_role(sk), sk);
return;
}
packet = dccp_rx_hist_find_data_packet(&hcrx->ccid3hcrx_hist);
if (unlikely(packet == NULL)) {
LIMIT_NETDEBUG(KERN_WARNING "%s: %s, sk=%p, no data packet "
"in history!\n",
__FUNCTION__, dccp_role(sk), sk);
DCCP_WARN("%s, sk=%p, no data packet in history!\n",
dccp_role(sk), sk);
return;
}
@ -820,29 +808,29 @@ static u32 ccid3_hc_rx_calc_first_li(struct sock *sk)
}
if (unlikely(step == 0)) {
LIMIT_NETDEBUG(KERN_WARNING "%s: %s, sk=%p, packet history "
"contains no data packets!\n",
__FUNCTION__, dccp_role(sk), sk);
DCCP_WARN("%s, sk=%p, packet history has no data packets!\n",
dccp_role(sk), sk);
return ~0;
}
if (unlikely(interval == 0)) {
LIMIT_NETDEBUG(KERN_WARNING "%s: %s, sk=%p, Could not find a "
"win_count interval > 0. Defaulting to 1\n",
__FUNCTION__, dccp_role(sk), sk);
DCCP_WARN("%s, sk=%p, Could not find a win_count interval > 0."
"Defaulting to 1\n", dccp_role(sk), sk);
interval = 1;
}
found:
if (!tail) {
LIMIT_NETDEBUG(KERN_WARNING "%s: tail is null\n",
__FUNCTION__);
DCCP_CRIT("tail is null\n");
return ~0;
}
rtt = timeval_delta(&tstamp, &tail->dccphrx_tstamp) * 4 / interval;
ccid3_pr_debug("%s, sk=%p, approximated RTT to %uus\n",
dccp_role(sk), sk, rtt);
if (rtt == 0)
rtt = 1;
if (rtt == 0) {
DCCP_WARN("RTT==0, setting to 1\n");
rtt = 1;
}
dccp_timestamp(sk, &tstamp);
delta = timeval_delta(&tstamp, &hcrx->ccid3hcrx_tstamp_last_feedback);
@ -856,9 +844,7 @@ static u32 ccid3_hc_rx_calc_first_li(struct sock *sk)
tmp2 = (u32)tmp1;
if (!tmp2) {
LIMIT_NETDEBUG(KERN_WARNING "tmp2 = 0 "
"%s: x_recv = %u, rtt =%u\n",
__FUNCTION__, x_recv, rtt);
DCCP_CRIT("tmp2 = 0, x_recv = %u, rtt =%u\n", x_recv, rtt);
return ~0;
}
@ -904,8 +890,7 @@ static void ccid3_hc_rx_update_li(struct sock *sk, u64 seq_loss, u8 win_loss)
entry = dccp_li_hist_entry_new(ccid3_li_hist, SLAB_ATOMIC);
if (entry == NULL) {
printk(KERN_CRIT "%s: out of memory\n",__FUNCTION__);
dump_stack();
DCCP_BUG("out of memory - can not allocate entry");
return;
}
@ -984,9 +969,7 @@ static void ccid3_hc_rx_packet_recv(struct sock *sk, struct sk_buff *skb)
u32 p_prev, rtt_prev, r_sample, t_elapsed;
int loss;
BUG_ON(hcrx == NULL ||
!(hcrx->ccid3hcrx_state == TFRC_RSTATE_NO_DATA ||
hcrx->ccid3hcrx_state == TFRC_RSTATE_DATA));
BUG_ON(hcrx == NULL);
opt_recv = &dccp_sk(sk)->dccps_options_received;
@ -1004,9 +987,8 @@ static void ccid3_hc_rx_packet_recv(struct sock *sk, struct sk_buff *skb)
t_elapsed = opt_recv->dccpor_elapsed_time * 10;
if (unlikely(r_sample <= t_elapsed))
LIMIT_NETDEBUG(KERN_WARNING "%s: r_sample=%uus, "
"t_elapsed=%uus\n",
__FUNCTION__, r_sample, t_elapsed);
DCCP_WARN("r_sample=%uus, t_elapsed=%uus\n",
r_sample, t_elapsed);
else
r_sample -= t_elapsed;
@ -1030,9 +1012,8 @@ static void ccid3_hc_rx_packet_recv(struct sock *sk, struct sk_buff *skb)
packet = dccp_rx_hist_entry_new(ccid3_rx_hist, sk, opt_recv->dccpor_ndp,
skb, SLAB_ATOMIC);
if (unlikely(packet == NULL)) {
LIMIT_NETDEBUG(KERN_WARNING "%s: %s, sk=%p, Not enough mem to "
"add rx packet to history, consider it lost!\n",
__FUNCTION__, dccp_role(sk), sk);
DCCP_WARN("%s, sk=%p, Not enough mem to add rx packet "
"to history, consider it lost!\n", dccp_role(sk), sk);
return;
}
@ -1065,9 +1046,8 @@ static void ccid3_hc_rx_packet_recv(struct sock *sk, struct sk_buff *skb)
ccid3_hc_rx_send_feedback(sk);
}
return;
default:
DCCP_BUG("%s, sk=%p, Illegal state (%d)!", dccp_role(sk), sk,
hcrx->ccid3hcrx_state);
case TFRC_RSTATE_TERM:
DCCP_BUG("Illegal %s state TERM, sk=%p", dccp_role(sk), sk);
return;
}
@ -1084,10 +1064,8 @@ static void ccid3_hc_rx_packet_recv(struct sock *sk, struct sk_buff *skb)
/* Scaling up by 1000000 as fixed decimal */
if (i_mean != 0)
hcrx->ccid3hcrx_p = 1000000 / i_mean;
} else {
printk(KERN_CRIT "%s: empty loss hist\n",__FUNCTION__);
dump_stack();
}
} else
DCCP_BUG("empty loss history");
if (hcrx->ccid3hcrx_p > p_prev) {
ccid3_hc_rx_send_feedback(sk);

View file

@ -13,7 +13,7 @@
#include <linux/module.h>
#include <net/sock.h>
#include "../../dccp.h"
#include "loss_interval.h"
struct dccp_li_hist *dccp_li_hist_new(const char *name)
@ -109,7 +109,7 @@ u32 dccp_li_hist_calc_i_mean(struct list_head *list)
i_tot = max(i_tot0, i_tot1);
if (!w_tot) {
LIMIT_NETDEBUG(KERN_WARNING "%s: w_tot = 0\n", __FUNCTION__);
DCCP_WARN("w_tot = 0\n");
return 1;
}
@ -128,7 +128,7 @@ int dccp_li_hist_interval_new(struct dccp_li_hist *hist,
entry = dccp_li_hist_entry_new(hist, SLAB_ATOMIC);
if (entry == NULL) {
dccp_li_hist_purge(hist, list);
dump_stack();
DCCP_BUG("loss interval list entry is NULL");
return 0;
}
entry->dccplih_interval = ~0;

View file

@ -13,9 +13,8 @@
*/
#include <linux/module.h>
#include <asm/div64.h>
#include "../../dccp.h"
#include "tfrc.h"
#define TFRC_CALC_X_ARRSIZE 500
@ -588,8 +587,10 @@ u32 tfrc_calc_x(u16 s, u32 R, u32 p)
/* p should be 0 unless there is a bug in my code */
index = 0;
if (R == 0)
if (R == 0) {
DCCP_WARN("RTT==0, setting to 1\n");
R = 1; /* RTT can't be zero or else divide by zero */
}
BUG_ON(index >= TFRC_CALC_X_ARRSIZE);

View file

@ -18,12 +18,17 @@
#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))); \
/*
* DCCP - specific warning and debugging macros.
*/
#define DCCP_WARN(fmt, a...) LIMIT_NETDEBUG(KERN_WARNING "%s: " fmt, \
__FUNCTION__, ##a)
#define DCCP_CRIT(fmt, a...) printk(KERN_CRIT fmt " at %s:%d/%s()\n", ##a, \
__FILE__, __LINE__, __FUNCTION__)
#define DCCP_BUG(a...) do { DCCP_CRIT("BUG: " a); dump_stack(); } while(0)
#define DCCP_BUG_ON(cond) do { if (unlikely((cond) != 0)) \
DCCP_BUG("\"%s\" holds (exception!)", \
__stringify(cond)); \
} while (0)
#ifdef MODULE

View file

@ -25,11 +25,11 @@ int dccp_feat_change(struct dccp_minisock *dmsk, u8 type, u8 feature,
dccp_feat_debug(type, feature, *val);
if (!dccp_feat_is_valid_type(type)) {
pr_info("option type %d invalid in negotiation\n", type);
DCCP_WARN("option type %d invalid in negotiation\n", type);
return 1;
}
if (!dccp_feat_is_valid_length(type, feature, len)) {
pr_info("invalid length %d\n", len);
DCCP_WARN("invalid length %d\n", len);
return 1;
}
/* XXX add further sanity checks */
@ -169,7 +169,8 @@ static int dccp_feat_reconcile(struct sock *sk, struct dccp_opt_pend *opt,
break;
default:
WARN_ON(1); /* XXX implement res */
DCCP_BUG("Fell through, feat=%d", opt->dccpop_feat);
/* XXX implement res */
return -EFAULT;
}
@ -328,7 +329,7 @@ static void dccp_feat_empty_confirm(struct dccp_minisock *dmsk,
switch (type) {
case DCCPO_CHANGE_L: opt->dccpop_type = DCCPO_CONFIRM_R; break;
case DCCPO_CHANGE_R: opt->dccpop_type = DCCPO_CONFIRM_L; break;
default: pr_info("invalid type %d\n", type); return;
default: DCCP_WARN("invalid type %d\n", type); return;
}
opt->dccpop_feat = feature;
@ -426,7 +427,7 @@ int dccp_feat_confirm_recv(struct sock *sk, u8 type, u8 feature,
switch (type) {
case DCCPO_CONFIRM_L: t = DCCPO_CHANGE_R; break;
case DCCPO_CONFIRM_R: t = DCCPO_CHANGE_L; break;
default: pr_info("invalid type %d\n", type);
default: DCCP_WARN("invalid type %d\n", type);
return 1;
}

View file

@ -128,21 +128,18 @@ static int dccp_check_seqno(struct sock *sk, struct sk_buff *skb)
DCCP_PKT_WITHOUT_ACK_SEQ))
dp->dccps_gar = DCCP_SKB_CB(skb)->dccpd_ack_seq;
} else {
LIMIT_NETDEBUG(KERN_WARNING "DCCP: Step 6 failed for %s packet, "
"(LSWL(%llu) <= P.seqno(%llu) <= S.SWH(%llu)) and "
"(P.ackno %s or LAWL(%llu) <= P.ackno(%llu) <= S.AWH(%llu), "
"sending SYNC...\n",
dccp_packet_name(dh->dccph_type),
(unsigned long long) lswl,
(unsigned long long)
DCCP_SKB_CB(skb)->dccpd_seq,
(unsigned long long) dp->dccps_swh,
(DCCP_SKB_CB(skb)->dccpd_ack_seq ==
DCCP_WARN("DCCP: Step 6 failed for %s packet, "
"(LSWL(%llu) <= P.seqno(%llu) <= S.SWH(%llu)) and "
"(P.ackno %s or LAWL(%llu) <= P.ackno(%llu) <= S.AWH(%llu), "
"sending SYNC...\n", dccp_packet_name(dh->dccph_type),
(unsigned long long) lswl,
(unsigned long long) DCCP_SKB_CB(skb)->dccpd_seq,
(unsigned long long) dp->dccps_swh,
(DCCP_SKB_CB(skb)->dccpd_ack_seq ==
DCCP_PKT_WITHOUT_ACK_SEQ) ? "doesn't exist" : "exists",
(unsigned long long) lawl,
(unsigned long long)
DCCP_SKB_CB(skb)->dccpd_ack_seq,
(unsigned long long) dp->dccps_awh);
(unsigned long long) lawl,
(unsigned long long) DCCP_SKB_CB(skb)->dccpd_ack_seq,
(unsigned long long) dp->dccps_awh);
dccp_send_sync(sk, DCCP_SKB_CB(skb)->dccpd_seq, DCCP_PKT_SYNC);
return -1;
}

View file

@ -747,7 +747,7 @@ int dccp_invalid_packet(struct sk_buff *skb)
/* If the packet is shorter than 12 bytes, drop packet and return */
if (!pskb_may_pull(skb, sizeof(struct dccp_hdr))) {
LIMIT_NETDEBUG(KERN_WARNING "DCCP: pskb_may_pull failed\n");
DCCP_WARN("pskb_may_pull failed\n");
return 1;
}
@ -755,7 +755,7 @@ int dccp_invalid_packet(struct sk_buff *skb)
/* If P.type is not understood, drop packet and return */
if (dh->dccph_type >= DCCP_PKT_INVALID) {
LIMIT_NETDEBUG(KERN_WARNING "DCCP: invalid packet type\n");
DCCP_WARN("invalid packet type\n");
return 1;
}
@ -763,16 +763,14 @@ int dccp_invalid_packet(struct sk_buff *skb)
* If P.Data Offset is too small for packet type, drop packet and return
*/
if (dh->dccph_doff < dccp_hdr_len(skb) / sizeof(u32)) {
LIMIT_NETDEBUG(KERN_WARNING "DCCP: P.Data Offset(%u) "
"too small\n", dh->dccph_doff);
DCCP_WARN("P.Data Offset(%u) too small\n", dh->dccph_doff);
return 1;
}
/*
* If P.Data Offset is too too large for packet, drop packet and return
*/
if (!pskb_may_pull(skb, dh->dccph_doff * sizeof(u32))) {
LIMIT_NETDEBUG(KERN_WARNING "DCCP: P.Data Offset(%u) "
"too large\n", dh->dccph_doff);
DCCP_WARN("P.Data Offset(%u) too large\n", dh->dccph_doff);
return 1;
}
@ -782,9 +780,8 @@ int dccp_invalid_packet(struct sk_buff *skb)
*/
if (dh->dccph_type >= DCCP_PKT_DATA &&
dh->dccph_type <= DCCP_PKT_DATAACK && dh->dccph_x == 0) {
LIMIT_NETDEBUG(KERN_WARNING "DCCP: P.type (%s) not Data||Ack||"
"DataAck, while P.X == 0\n",
dccp_packet_name(dh->dccph_type));
DCCP_WARN("P.type (%s) not Data || [Data]Ack, while P.X == 0\n",
dccp_packet_name(dh->dccph_type));
return 1;
}
@ -794,9 +791,8 @@ int dccp_invalid_packet(struct sk_buff *skb)
*/
cscov = dccp_csum_coverage(skb);
if (cscov > skb->len) {
LIMIT_NETDEBUG(KERN_WARNING
"DCCP: P.CsCov %u exceeds packet length %d\n",
dh->dccph_cscov, skb->len);
DCCP_WARN("P.CsCov %u exceeds packet length %d\n",
dh->dccph_cscov, skb->len);
return 1;
}
@ -823,9 +819,7 @@ static int dccp_v4_rcv(struct sk_buff *skb)
/* Step 1: If header checksum is incorrect, drop packet and return */
if (dccp_v4_csum_finish(skb, skb->nh.iph->saddr, skb->nh.iph->daddr)) {
LIMIT_NETDEBUG(KERN_WARNING
"%s: dropped packet with invalid checksum\n",
__FUNCTION__);
DCCP_WARN("dropped packet with invalid checksum\n");
goto discard_it;
}

View file

@ -828,9 +828,7 @@ static int dccp_v6_rcv(struct sk_buff **pskb)
/* Step 1: If header checksum is incorrect, drop packet and return. */
if (dccp_v6_csum_finish(skb, &skb->nh.ipv6h->saddr,
&skb->nh.ipv6h->daddr)) {
LIMIT_NETDEBUG(KERN_WARNING
"%s: dropped packet with invalid checksum\n",
__FUNCTION__);
DCCP_WARN("dropped packet with invalid checksum\n");
goto discard_it;
}

View file

@ -84,8 +84,7 @@ void dccp_time_wait(struct sock *sk, int state, int timeo)
* socket up. We've got bigger problems than
* non-graceful socket closings.
*/
LIMIT_NETDEBUG(KERN_INFO "DCCP: time wait bucket "
"table overflow\n");
DCCP_WARN("time wait bucket table overflow\n");
}
dccp_done(sk);
@ -289,9 +288,7 @@ EXPORT_SYMBOL_GPL(dccp_child_process);
void dccp_reqsk_send_ack(struct sk_buff *skb, struct request_sock *rsk)
{
pr_info(KERN_WARNING "DCCP: ACK packets are never sent in "
"LISTEN/RESPOND state\n");
dump_stack();
DCCP_BUG("DCCP-ACK packets are never sent in LISTEN/RESPOND state");
}
EXPORT_SYMBOL_GPL(dccp_reqsk_send_ack);

View file

@ -238,9 +238,8 @@ int dccp_parse_options(struct sock *sk, struct sk_buff *skb)
}
break;
default:
pr_info("DCCP(%p): option %d(len=%d) not "
"implemented, ignoring\n",
sk, opt, len);
DCCP_CRIT("DCCP(%p): option %d(len=%d) not "
"implemented, ignoring", sk, opt, len);
break;
}
@ -257,7 +256,7 @@ int dccp_parse_options(struct sock *sk, struct sk_buff *skb)
out_invalid_option:
DCCP_INC_STATS_BH(DCCP_MIB_INVALIDOPT);
DCCP_SKB_CB(skb)->dccpd_reset_code = DCCP_RESET_CODE_OPTION_ERROR;
pr_info("DCCP(%p): invalid option %d, len=%d\n", sk, opt, len);
DCCP_WARN("DCCP(%p): invalid option %d, len=%d", sk, opt, len);
return -1;
}
@ -447,8 +446,7 @@ static int dccp_insert_feat_opt(struct sk_buff *skb, u8 type, u8 feat,
u8 *to;
if (DCCP_SKB_CB(skb)->dccpd_opt_len + len + 3 > DCCP_MAX_OPT_LEN) {
LIMIT_NETDEBUG(KERN_INFO "DCCP: packet too small"
" to insert feature %d option!\n", feat);
DCCP_WARN("packet too small for feature %d option!\n", feat);
return -1;
}

View file

@ -257,11 +257,8 @@ void dccp_write_xmit(struct sock *sk, int block)
err = dccp_wait_for_ccid(sk, skb, &timeo);
timeo = DCCP_XMIT_TIMEO;
}
if (err) {
printk(KERN_CRIT "%s:err at dccp_wait_for_ccid"
" %d\n", __FUNCTION__, err);
dump_stack();
}
if (err)
DCCP_BUG("err=%d after dccp_wait_for_ccid", err);
}
skb_dequeue(&sk->sk_write_queue);
@ -283,12 +280,9 @@ void dccp_write_xmit(struct sock *sk, int block)
err = dccp_transmit_skb(sk, skb);
ccid_hc_tx_packet_sent(dp->dccps_hc_tx_ccid, sk, 0, len);
if (err) {
printk(KERN_CRIT "%s:err from "
"ccid_hc_tx_packet_sent %d\n",
__FUNCTION__, err);
dump_stack();
}
if (err)
DCCP_BUG("err=%d after ccid_hc_tx_packet_sent",
err);
} else
kfree(skb);
}

View file

@ -1033,8 +1033,7 @@ static int __init dccp_init(void)
} while (!dccp_hashinfo.ehash && --ehash_order > 0);
if (!dccp_hashinfo.ehash) {
printk(KERN_CRIT "Failed to allocate DCCP "
"established hash table\n");
DCCP_CRIT("Failed to allocate DCCP established hash table");
goto out_free_bind_bucket_cachep;
}
@ -1056,7 +1055,7 @@ static int __init dccp_init(void)
} while (!dccp_hashinfo.bhash && --bhash_order >= 0);
if (!dccp_hashinfo.bhash) {
printk(KERN_CRIT "Failed to allocate DCCP bind hash table\n");
DCCP_CRIT("Failed to allocate DCCP bind hash table");
goto out_free_dccp_ehash;
}