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Diffstat (limited to 'net/dccp/ccids')
-rw-r--r--net/dccp/ccids/ccid3.c164
1 files changed, 67 insertions, 97 deletions
diff --git a/net/dccp/ccids/ccid3.c b/net/dccp/ccids/ccid3.c
index 4467a74e6f4..e05f4f955ee 100644
--- a/net/dccp/ccids/ccid3.c
+++ b/net/dccp/ccids/ccid3.c
@@ -78,13 +78,11 @@ static struct dccp_li_hist *ccid3_li_hist;
static int ccid3_init(struct sock *sk)
{
- ccid3_pr_debug("%s, sk=%p\n", dccp_role(sk), sk);
return 0;
}
static void ccid3_exit(struct sock *sk)
{
- ccid3_pr_debug("%s, sk=%p\n", dccp_role(sk), sk);
}
/* TFRC sender states */
@@ -287,14 +285,14 @@ static int ccid3_hc_tx_send_packet(struct sock *sk,
long delay;
int rc = -ENOTCONN;
- /* Check if pure ACK or Terminating*/
+ BUG_ON(hctx == NULL || hctx->ccid3hctx_state == TFRC_SSTATE_TERM);
+ /* Check if pure ACK or Terminating*/
/*
* XXX: We only call this function for DATA and DATAACK, on, these
* packets can have zero length, but why the comment about "pure ACK"?
*/
- if (hctx == NULL || len == 0 ||
- hctx->ccid3hctx_state == TFRC_SSTATE_TERM)
+ if (unlikely(len == 0))
goto out;
/* See if last packet allocated was not sent */
@@ -304,10 +302,10 @@ static int ccid3_hc_tx_send_packet(struct sock *sk,
SLAB_ATOMIC);
rc = -ENOBUFS;
- if (new_packet == NULL) {
- ccid3_pr_debug("%s, sk=%p, not enough mem to add "
- "to history, send refused\n",
- dccp_role(sk), sk);
+ 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);
goto out;
}
@@ -318,9 +316,6 @@ static int ccid3_hc_tx_send_packet(struct sock *sk,
switch (hctx->ccid3hctx_state) {
case TFRC_SSTATE_NO_SENT:
- ccid3_pr_debug("%s, sk=%p, first packet(%llu)\n",
- dccp_role(sk), sk, dp->dccps_gss);
-
hctx->ccid3hctx_no_feedback_timer.function = ccid3_hc_tx_no_feedback_timer;
hctx->ccid3hctx_no_feedback_timer.data = (unsigned long)sk;
sk_reset_timer(sk, &hctx->ccid3hctx_no_feedback_timer,
@@ -341,7 +336,6 @@ static int ccid3_hc_tx_send_packet(struct sock *sk,
case TFRC_SSTATE_FBACK:
delay = (timeval_delta(&now, &hctx->ccid3hctx_t_nom) -
hctx->ccid3hctx_delta);
- ccid3_pr_debug("send_packet delay=%ld\n", delay);
delay /= -1000;
/* divide by -1000 is to convert to ms and get sign right */
rc = delay > 0 ? delay : 0;
@@ -371,13 +365,7 @@ 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);
-
- if (hctx->ccid3hctx_state == TFRC_SSTATE_TERM) {
- ccid3_pr_debug("%s, sk=%p, while state is TFRC_SSTATE_TERM!\n",
- dccp_role(sk), sk);
- return;
- }
+ BUG_ON(hctx == NULL || hctx->ccid3hctx_state == TFRC_SSTATE_TERM);
dccp_timestamp(sk, &now);
@@ -387,14 +375,14 @@ static void ccid3_hc_tx_packet_sent(struct sock *sk, int more, int len)
struct dccp_tx_hist_entry *packet;
packet = dccp_tx_hist_head(&hctx->ccid3hctx_hist);
- if (packet == NULL) {
- printk(KERN_CRIT "%s: packet doesn't exists in "
- "history!\n", __FUNCTION__);
+ if (unlikely(packet == NULL)) {
+ LIMIT_NETDEBUG(KERN_WARNING "%s: packet doesn't "
+ "exists in history!\n", __FUNCTION__);
return;
}
- if (packet->dccphtx_sent) {
- printk(KERN_CRIT "%s: no unsent packet in history!\n",
- __FUNCTION__);
+ if (unlikely(packet->dccphtx_sent)) {
+ LIMIT_NETDEBUG(KERN_WARNING "%s: no unsent packet in "
+ "history!\n", __FUNCTION__);
return;
}
packet->dccphtx_tstamp = now;
@@ -465,14 +453,7 @@ static void ccid3_hc_tx_packet_recv(struct sock *sk, struct sk_buff *skb)
u32 x_recv;
u32 r_sample;
- if (hctx == NULL)
- return;
-
- if (hctx->ccid3hctx_state == TFRC_SSTATE_TERM) {
- ccid3_pr_debug("%s, sk=%p, received a packet when "
- "terminating!\n", dccp_role(sk), sk);
- return;
- }
+ BUG_ON(hctx == NULL || hctx->ccid3hctx_state == TFRC_SSTATE_TERM);
/* we are only interested in ACKs */
if (!(DCCP_SKB_CB(skb)->dccpd_type == DCCP_PKT_ACK ||
@@ -496,12 +477,12 @@ static void ccid3_hc_tx_packet_recv(struct sock *sk, struct sk_buff *skb)
/* get t_recvdata from history */
packet = dccp_tx_hist_find_entry(&hctx->ccid3hctx_hist,
DCCP_SKB_CB(skb)->dccpd_ack_seq);
- if (packet == NULL) {
- ccid3_pr_debug("%s, sk=%p, seqno %llu(%s) does't "
- "exist in history!\n",
- dccp_role(sk), sk,
- DCCP_SKB_CB(skb)->dccpd_ack_seq,
- dccp_packet_name(DCCP_SKB_CB(skb)->dccpd_type));
+ 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,
+ (unsigned long long)DCCP_SKB_CB(skb)->dccpd_ack_seq,
+ dccp_packet_name(DCCP_SKB_CB(skb)->dccpd_type));
return;
}
@@ -509,8 +490,8 @@ 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",
+ LIMIT_NETDEBUG(KERN_WARNING "%s: r_sample=%uus, "
+ "t_elapsed=%uus\n",
__FUNCTION__, r_sample, t_elapsed);
else
r_sample -= t_elapsed;
@@ -606,10 +587,11 @@ static void ccid3_hc_tx_packet_recv(struct sock *sk, struct sk_buff *skb)
static void ccid3_hc_tx_insert_options(struct sock *sk, struct sk_buff *skb)
{
- struct ccid3_hc_tx_sock *hctx = ccid3_hc_tx_sk(sk);
+ const struct ccid3_hc_tx_sock *hctx = ccid3_hc_tx_sk(sk);
- if (hctx == NULL || !(sk->sk_state == DCCP_OPEN ||
- sk->sk_state == DCCP_PARTOPEN))
+ BUG_ON(hctx == NULL);
+
+ if (!(sk->sk_state == DCCP_OPEN || sk->sk_state == DCCP_PARTOPEN))
return;
DCCP_SKB_CB(skb)->dccpd_ccval = hctx->ccid3hctx_last_win_count;
@@ -624,8 +606,7 @@ static int ccid3_hc_tx_parse_options(struct sock *sk, unsigned char option,
struct ccid3_hc_tx_sock *hctx = ccid3_hc_tx_sk(sk);
struct ccid3_options_received *opt_recv;
- if (hctx == NULL)
- return 0;
+ BUG_ON(hctx == NULL);
opt_recv = &hctx->ccid3hctx_options_received;
@@ -639,10 +620,10 @@ static int ccid3_hc_tx_parse_options(struct sock *sk, unsigned char option,
switch (option) {
case TFRC_OPT_LOSS_EVENT_RATE:
- if (len != 4) {
- ccid3_pr_debug("%s, sk=%p, invalid len for "
- "TFRC_OPT_LOSS_EVENT_RATE\n",
- dccp_role(sk), sk);
+ 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);
rc = -EINVAL;
} else {
opt_recv->ccid3or_loss_event_rate = ntohl(*(u32 *)value);
@@ -660,10 +641,10 @@ static int ccid3_hc_tx_parse_options(struct sock *sk, unsigned char option,
opt_recv->ccid3or_loss_intervals_len);
break;
case TFRC_OPT_RECEIVE_RATE:
- if (len != 4) {
- ccid3_pr_debug("%s, sk=%p, invalid len for "
- "TFRC_OPT_RECEIVE_RATE\n",
- dccp_role(sk), sk);
+ 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);
rc = -EINVAL;
} else {
opt_recv->ccid3or_receive_rate = ntohl(*(u32 *)value);
@@ -682,8 +663,6 @@ static int ccid3_hc_tx_init(struct sock *sk)
struct dccp_sock *dp = dccp_sk(sk);
struct ccid3_hc_tx_sock *hctx;
- ccid3_pr_debug("%s, sk=%p\n", dccp_role(sk), sk);
-
dp->dccps_hc_tx_ccid_private = kmalloc(sizeof(*hctx), gfp_any());
if (dp->dccps_hc_tx_ccid_private == NULL)
return -ENOMEM;
@@ -712,7 +691,6 @@ static void ccid3_hc_tx_exit(struct sock *sk)
struct dccp_sock *dp = dccp_sk(sk);
struct ccid3_hc_tx_sock *hctx = ccid3_hc_tx_sk(sk);
- ccid3_pr_debug("%s, sk=%p\n", dccp_role(sk), sk);
BUG_ON(hctx == NULL);
ccid3_hc_tx_set_state(sk, TFRC_SSTATE_TERM);
@@ -792,10 +770,10 @@ static void ccid3_hc_rx_send_feedback(struct sock *sk)
}
packet = dccp_rx_hist_find_data_packet(&hcrx->ccid3hcrx_hist);
- if (packet == NULL) {
- printk(KERN_CRIT "%s: %s, sk=%p, no data packet in history!\n",
- __FUNCTION__, dccp_role(sk), sk);
- dump_stack();
+ if (unlikely(packet == NULL)) {
+ LIMIT_NETDEBUG(KERN_WARNING "%s: %s, sk=%p, no data packet "
+ "in history!\n",
+ __FUNCTION__, dccp_role(sk), sk);
return;
}
@@ -817,11 +795,12 @@ static void ccid3_hc_rx_send_feedback(struct sock *sk)
static void ccid3_hc_rx_insert_options(struct sock *sk, struct sk_buff *skb)
{
- struct ccid3_hc_rx_sock *hcrx = ccid3_hc_rx_sk(sk);
+ const struct ccid3_hc_rx_sock *hcrx = ccid3_hc_rx_sk(sk);
u32 x_recv, pinv;
- if (hcrx == NULL || !(sk->sk_state == DCCP_OPEN ||
- sk->sk_state == DCCP_PARTOPEN))
+ BUG_ON(hcrx == NULL);
+
+ if (!(sk->sk_state == DCCP_OPEN || sk->sk_state == DCCP_PARTOPEN))
return;
DCCP_SKB_CB(skb)->dccpd_ccval = hcrx->ccid3hcrx_last_counter;
@@ -878,17 +857,17 @@ static u32 ccid3_hc_rx_calc_first_li(struct sock *sk)
}
}
- if (step == 0) {
- printk(KERN_CRIT "%s: %s, sk=%p, packet history contains no "
- "data packets!\n",
- __FUNCTION__, dccp_role(sk), 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);
return ~0;
}
- if (interval == 0) {
- ccid3_pr_debug("%s, sk=%p, Could not find a win_count "
- "interval > 0. Defaulting to 1\n",
- dccp_role(sk), sk);
+ 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);
interval = 1;
}
found:
@@ -931,8 +910,9 @@ static void ccid3_hc_rx_update_li(struct sock *sk, u64 seq_loss, u8 win_loss)
if (li_tail == NULL)
return;
li_tail->dccplih_interval = ccid3_hc_rx_calc_first_li(sk);
- }
- /* FIXME: find end of interval */
+ } else
+ LIMIT_NETDEBUG(KERN_WARNING "%s: FIXME: find end of "
+ "interval\n", __FUNCTION__);
}
static void ccid3_hc_rx_detect_loss(struct sock *sk)
@@ -956,10 +936,8 @@ static void ccid3_hc_rx_packet_recv(struct sock *sk, struct sk_buff *skb)
u32 p_prev, r_sample, t_elapsed;
int ins;
- if (hcrx == NULL)
- return;
-
- BUG_ON(!(hcrx->ccid3hcrx_state == TFRC_RSTATE_NO_DATA ||
+ BUG_ON(hcrx == NULL ||
+ !(hcrx->ccid3hcrx_state == TFRC_RSTATE_NO_DATA ||
hcrx->ccid3hcrx_state == TFRC_RSTATE_DATA));
opt_recv = &dccp_sk(sk)->dccps_options_received;
@@ -978,8 +956,8 @@ 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",
+ LIMIT_NETDEBUG(KERN_WARNING "%s: r_sample=%uus, "
+ "t_elapsed=%uus\n",
__FUNCTION__, r_sample, t_elapsed);
else
r_sample -= t_elapsed;
@@ -997,19 +975,16 @@ static void ccid3_hc_rx_packet_recv(struct sock *sk, struct sk_buff *skb)
break;
case DCCP_PKT_DATA:
break;
- default:
- ccid3_pr_debug("%s, sk=%p, not DATA/DATAACK/ACK packet(%s)\n",
- dccp_role(sk), sk,
- dccp_packet_name(DCCP_SKB_CB(skb)->dccpd_type));
+ default: /* We're not interested in other packet types, move along */
return;
}
packet = dccp_rx_hist_entry_new(ccid3_rx_hist, sk, opt_recv->dccpor_ndp,
skb, SLAB_ATOMIC);
- if (packet == NULL) {
- ccid3_pr_debug("%s, sk=%p, Not enough mem to add rx packet "
- "to history (consider it lost)!",
- dccp_role(sk), sk);
+ 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);
return;
}
@@ -1102,10 +1077,7 @@ static void ccid3_hc_rx_exit(struct sock *sk)
struct ccid3_hc_rx_sock *hcrx = ccid3_hc_rx_sk(sk);
struct dccp_sock *dp = dccp_sk(sk);
- ccid3_pr_debug("%s, sk=%p\n", dccp_role(sk), sk);
-
- if (hcrx == NULL)
- return;
+ BUG_ON(hcrx == NULL);
ccid3_hc_rx_set_state(sk, TFRC_RSTATE_TERM);
@@ -1123,8 +1095,7 @@ static void ccid3_hc_rx_get_info(struct sock *sk, struct tcp_info *info)
{
const struct ccid3_hc_rx_sock *hcrx = ccid3_hc_rx_sk(sk);
- if (hcrx == NULL)
- return;
+ BUG_ON(hcrx == NULL);
info->tcpi_ca_state = hcrx->ccid3hcrx_state;
info->tcpi_options |= TCPI_OPT_TIMESTAMPS;
@@ -1135,8 +1106,7 @@ static void ccid3_hc_tx_get_info(struct sock *sk, struct tcp_info *info)
{
const struct ccid3_hc_tx_sock *hctx = ccid3_hc_tx_sk(sk);
- if (hctx == NULL)
- return;
+ BUG_ON(hctx == NULL);
info->tcpi_rto = hctx->ccid3hctx_t_rto;
info->tcpi_rtt = hctx->ccid3hctx_rtt;
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-12 12:47:27 +0000