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[DCCP] Introduce dccp_timestamp

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To start the timestamps with 0.0ms, easing the integer maths in the CCIDs, this
probably will be reworked to use the to be introduced struct timeval_offset
infrastructure out of skb_get_timestamp, etc.

Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2005-09-09 02:38:35 -03:00
parent 954ee31f36
commit b0e567806d
9 changed files with 61 additions and 39 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

1
include/linux/dccp.h
View file

@ -432,6 +432,7 @@ struct dccp_sock {
struct ccid *dccps_hc_rx_ccid;
struct ccid *dccps_hc_tx_ccid;
struct dccp_options_received dccps_options_received;
struct timeval dccps_epoch;
enum dccp_role dccps_role:2;
__u8 dccps_hc_rx_insert_options:1;
__u8 dccps_hc_tx_insert_options:1;

27
net/dccp/ccids/ccid3.c
View file

@ -169,7 +169,7 @@ static void ccid3_hc_tx_update_x(struct sock *sk)
} else {
struct timeval now;
do_gettimeofday(&now);
dccp_timestamp(sk, &now);
if (timeval_delta(&now, &hctx->ccid3hctx_t_ld) >=
hctx->ccid3hctx_rtt) {
hctx->ccid3hctx_x = max_t(u32, min_t(u32, hctx->ccid3hctx_x_recv,
@ -317,7 +317,7 @@ static int ccid3_hc_tx_send_packet(struct sock *sk,
dccp_tx_hist_add_entry(&hctx->ccid3hctx_hist, new_packet);
}
do_gettimeofday(&now);
dccp_timestamp(sk, &now);
switch (hctx->ccid3hctx_state) {
case TFRC_SSTATE_NO_SENT:
@ -382,7 +382,7 @@ static void ccid3_hc_tx_packet_sent(struct sock *sk, int more, int len)
return;
}
do_gettimeofday(&now);
dccp_timestamp(sk, &now);
/* check if we have sent a data packet */
if (len > 0) {
@ -461,6 +461,7 @@ static void ccid3_hc_tx_packet_recv(struct sock *sk, struct sk_buff *skb)
struct ccid3_hc_tx_sock *hctx = dp->dccps_hc_tx_ccid_private;
struct ccid3_options_received *opt_recv;
struct dccp_tx_hist_entry *packet;
struct timeval now;
unsigned long next_tmout;
u32 t_elapsed;
u32 pinv;
@ -508,7 +509,8 @@ static void ccid3_hc_tx_packet_recv(struct sock *sk, struct sk_buff *skb)
}
/* Update RTT */
r_sample = timeval_now_delta(&packet->dccphtx_tstamp);
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",
@ -774,7 +776,7 @@ static void ccid3_hc_rx_send_feedback(struct sock *sk)
ccid3_pr_debug("%s, sk=%p\n", dccp_role(sk), sk);
do_gettimeofday(&now);
dccp_timestamp(sk, &now);
switch (hcrx->ccid3hcrx_state) {
case TFRC_RSTATE_NO_DATA:
@ -903,10 +905,9 @@ found:
if (rtt == 0)
rtt = 1;
delta = timeval_now_delta(&hcrx->ccid3hcrx_tstamp_last_feedback);
x_recv = hcrx->ccid3hcrx_bytes_recv * USEC_PER_SEC;
if (likely(delta > 1))
x_recv /= delta;
dccp_timestamp(sk, &tstamp);
delta = timeval_delta(&tstamp, &hcrx->ccid3hcrx_tstamp_last_feedback);
x_recv = usecs_div(hcrx->ccid3hcrx_bytes_recv, delta);
tmp1 = (u64)x_recv * (u64)rtt;
do_div(tmp1,10000000);
@ -981,7 +982,7 @@ static void ccid3_hc_rx_packet_recv(struct sock *sk, struct sk_buff *skb)
if (opt_recv->dccpor_timestamp_echo == 0)
break;
p_prev = hcrx->ccid3hcrx_rtt;
do_gettimeofday(&now);
dccp_timestamp(sk, &now);
timeval_sub_usecs(&now, opt_recv->dccpor_timestamp_echo * 10);
r_sample = timeval_usecs(&now);
t_elapsed = opt_recv->dccpor_elapsed_time * 10;
@ -1013,7 +1014,7 @@ static void ccid3_hc_rx_packet_recv(struct sock *sk, struct sk_buff *skb)
return;
}
packet = dccp_rx_hist_entry_new(ccid3_rx_hist, opt_recv->dccpor_ndp,
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 "
@ -1045,7 +1046,7 @@ static void ccid3_hc_rx_packet_recv(struct sock *sk, struct sk_buff *skb)
if (ins != 0)
break;
do_gettimeofday(&now);
dccp_timestamp(sk, &now);
if (timeval_delta(&now, &hcrx->ccid3hcrx_tstamp_last_ack) >=
hcrx->ccid3hcrx_rtt) {
hcrx->ccid3hcrx_tstamp_last_ack = now;
@ -1100,7 +1101,7 @@ static int ccid3_hc_rx_init(struct sock *sk)
hcrx->ccid3hcrx_state = TFRC_RSTATE_NO_DATA;
INIT_LIST_HEAD(&hcrx->ccid3hcrx_hist);
INIT_LIST_HEAD(&hcrx->ccid3hcrx_li_hist);
do_gettimeofday(&hcrx->ccid3hcrx_tstamp_last_ack);
dccp_timestamp(sk, &hcrx->ccid3hcrx_tstamp_last_ack);
hcrx->ccid3hcrx_tstamp_last_feedback = hcrx->ccid3hcrx_tstamp_last_ack;
hcrx->ccid3hcrx_rtt = 5000; /* XXX 5ms for now... */
return 0;

2
net/dccp/ccids/ccid3.h
View file

@ -115,7 +115,7 @@ struct ccid3_hc_rx_sock {
u64 ccid3hcrx_seqno_last_counter:48,
ccid3hcrx_state:8,
ccid3hcrx_last_counter:4;
unsigned long ccid3hcrx_rtt;
u32 ccid3hcrx_rtt;
u32 ccid3hcrx_p;
u32 ccid3hcrx_bytes_recv;
struct timeval ccid3hcrx_tstamp_last_feedback;

3
net/dccp/ccids/lib/packet_history.h
View file

@ -134,6 +134,7 @@ static inline struct dccp_tx_hist_entry *
static inline struct dccp_rx_hist_entry *
dccp_rx_hist_entry_new(struct dccp_rx_hist *hist,
const struct sock *sk,
const u32 ndp,
const struct sk_buff *skb,
const unsigned int __nocast prio)
@ -148,7 +149,7 @@ static inline struct dccp_rx_hist_entry *
entry->dccphrx_ccval = dh->dccph_ccval;
entry->dccphrx_type = dh->dccph_type;
entry->dccphrx_ndp = ndp;
do_gettimeofday(&(entry->dccphrx_tstamp));
dccp_timestamp(sk, &entry->dccphrx_tstamp);
}
return entry;

16
net/dccp/dccp.h
View file

@ -426,10 +426,13 @@ extern struct dccp_ackpkts *
dccp_ackpkts_alloc(unsigned int len,
const unsigned int __nocast priority);
extern void dccp_ackpkts_free(struct dccp_ackpkts *ap);
extern int dccp_ackpkts_add(struct dccp_ackpkts *ap, u64 ackno, u8 state);
extern int dccp_ackpkts_add(struct dccp_ackpkts *ap, const struct sock *sk,
u64 ackno, u8 state);
extern void dccp_ackpkts_check_rcv_ackno(struct dccp_ackpkts *ap,
struct sock *sk, u64 ackno);
extern void dccp_timestamp(const struct sock *sk, struct timeval *tv);
static inline suseconds_t timeval_usecs(const struct timeval *tv)
{
return tv->tv_sec * USEC_PER_SEC + tv->tv_usec;
@ -468,17 +471,6 @@ static inline void timeval_sub_usecs(struct timeval *tv,
}
}
/*
* Returns the difference in usecs between timeval
* passed in and current time
*/
static inline suseconds_t timeval_now_delta(const struct timeval *tv)
{
struct timeval now;
do_gettimeofday(&now);
return timeval_delta(&now, tv);
}
#ifdef CONFIG_IP_DCCP_DEBUG
extern void dccp_ackvector_print(const u64 ackno,
const unsigned char *vector, int len);

4
net/dccp/input.c
View file

@ -170,7 +170,7 @@ int dccp_rcv_established(struct sock *sk, struct sk_buff *skb,
if (dp->dccps_options.dccpo_send_ack_vector) {
struct dccp_ackpkts *ap = dp->dccps_hc_rx_ackpkts;
if (dccp_ackpkts_add(dp->dccps_hc_rx_ackpkts,
if (dccp_ackpkts_add(dp->dccps_hc_rx_ackpkts, sk,
DCCP_SKB_CB(skb)->dccpd_seq,
DCCP_ACKPKTS_STATE_RECEIVED)) {
LIMIT_NETDEBUG(KERN_WARNING "DCCP: acknowledgeable "
@ -498,7 +498,7 @@ int dccp_rcv_state_process(struct sock *sk, struct sk_buff *skb,
* DCCP_ACKPKTS_STATE_ECN_MARKED
*/
if (dp->dccps_options.dccpo_send_ack_vector) {
if (dccp_ackpkts_add(dp->dccps_hc_rx_ackpkts,
if (dccp_ackpkts_add(dp->dccps_hc_rx_ackpkts, sk,
DCCP_SKB_CB(skb)->dccpd_seq,
DCCP_ACKPKTS_STATE_RECEIVED))
goto discard;

1
net/dccp/ipv4.c
View file

@ -1243,6 +1243,7 @@ static int dccp_v4_init_sock(struct sock *sk)
static int dccp_ctl_socket_init = 1;
dccp_options_init(&dp->dccps_options);
do_gettimeofday(&dp->dccps_epoch);
if (dp->dccps_options.dccpo_send_ack_vector) {
dp->dccps_hc_rx_ackpkts =

1
net/dccp/minisocks.c
View file

@ -96,6 +96,7 @@ struct sock *dccp_create_openreq_child(struct sock *sk,
newdp->dccps_hc_rx_ackpkts = NULL;
newdp->dccps_role = DCCP_ROLE_SERVER;
newicsk->icsk_rto = DCCP_TIMEOUT_INIT;
do_gettimeofday(&newdp->dccps_epoch);
if (newdp->dccps_options.dccpo_send_ack_vector) {
newdp->dccps_hc_rx_ackpkts =

45
net/dccp/options.c
View file

@ -140,7 +140,7 @@ int dccp_parse_options(struct sock *sk, struct sk_buff *skb)
opt_recv->dccpor_timestamp = ntohl(*(u32 *)value);
dp->dccps_timestamp_echo = opt_recv->dccpor_timestamp;
do_gettimeofday(&dp->dccps_timestamp_time);
dccp_timestamp(sk, &dp->dccps_timestamp_time);
dccp_pr_debug("%sTIMESTAMP=%u, ackno=%llu\n",
debug_prefix, opt_recv->dccpor_timestamp,
@ -361,9 +361,13 @@ static void dccp_insert_option_ack_vector(struct sock *sk, struct sk_buff *skb)
#endif
struct dccp_ackpkts *ap = dp->dccps_hc_rx_ackpkts;
int len = ap->dccpap_buf_vector_len + 2;
const u32 elapsed_time = timeval_now_delta(&ap->dccpap_time) / 10;
struct timeval now;
u32 elapsed_time;
unsigned char *to, *from;
dccp_timestamp(sk, &now);
elapsed_time = timeval_delta(&now, &ap->dccpap_time) / 10;
if (elapsed_time != 0)
dccp_insert_option_elapsed_time(sk, skb, elapsed_time);
@ -428,13 +432,29 @@ static void dccp_insert_option_ack_vector(struct sock *sk, struct sk_buff *skb)
(unsigned long long) ap->dccpap_ack_ackno);
}
void dccp_timestamp(const struct sock *sk, struct timeval *tv)
{
const struct dccp_sock *dp = dccp_sk(sk);
do_gettimeofday(tv);
tv->tv_sec -= dp->dccps_epoch.tv_sec;
tv->tv_usec -= dp->dccps_epoch.tv_usec;
while (tv->tv_usec < 0) {
tv->tv_sec--;
tv->tv_usec += USEC_PER_SEC;
}
}
EXPORT_SYMBOL_GPL(dccp_timestamp);
void dccp_insert_option_timestamp(struct sock *sk, struct sk_buff *skb)
{
struct timeval tv;
u32 now;
do_gettimeofday(&tv);
now = (tv.tv_sec * USEC_PER_SEC + tv.tv_usec) / 10;
dccp_timestamp(sk, &tv);
now = timeval_usecs(&tv) / 10;
/* yes this will overflow but that is the point as we want a
* 10 usec 32 bit timer which mean it wraps every 11.9 hours */
@ -452,13 +472,17 @@ static void dccp_insert_option_timestamp_echo(struct sock *sk,
const char *debug_prefix = dp->dccps_role == DCCP_ROLE_CLIENT ?
"CLIENT TX opt: " : "server TX opt: ";
#endif
struct timeval now;
u32 tstamp_echo;
const u32 elapsed_time =
timeval_now_delta(&dp->dccps_timestamp_time) / 10;
const int elapsed_time_len = dccp_elapsed_time_len(elapsed_time);
const int len = 6 + elapsed_time_len;
u32 elapsed_time;
int len, elapsed_time_len;
unsigned char *to;
dccp_timestamp(sk, &now);
elapsed_time = timeval_delta(&now, &dp->dccps_timestamp_time) / 10;
elapsed_time_len = dccp_elapsed_time_len(elapsed_time);
len = 6 + elapsed_time_len;
if (DCCP_SKB_CB(skb)->dccpd_opt_len + len > DCCP_MAX_OPT_LEN) {
LIMIT_NETDEBUG(KERN_INFO "DCCP: packet too small to insert "
"timestamp echo!\n");
@ -623,7 +647,8 @@ static inline int dccp_ackpkts_set_buf_head_state(struct dccp_ackpkts *ap,
/*
* Implements the draft-ietf-dccp-spec-11.txt Appendix A
*/
int dccp_ackpkts_add(struct dccp_ackpkts *ap, u64 ackno, u8 state)
int dccp_ackpkts_add(struct dccp_ackpkts *ap, const struct sock *sk,
u64 ackno, u8 state)
{
/*
* Check at the right places if the buffer is full, if it is, tell the
@ -704,7 +729,7 @@ int dccp_ackpkts_add(struct dccp_ackpkts *ap, u64 ackno, u8 state)
}
ap->dccpap_buf_ackno = ackno;
do_gettimeofday(&ap->dccpap_time);
dccp_timestamp(sk, &ap->dccpap_time);
out:
dccp_pr_debug("");
dccp_ackpkts_print(ap);