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2005-09-09[CCID3] Initialize more fields in ccid3_hc_rx_initArnaldo Carvalho de Melo1-5/+3
The initialization of ccid3hcrx_rtt to 5ms is just a bandaid, I'll continue auditing the CCID3 HC rx codebase to fix this properly, probably I'll add a feedback timer as suggested in the CCID3 draft. Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
2005-09-09[CCID3] Make the ccid3hcrx_rtt calc look more like the ccid3hctx_rtt oneArnaldo Carvalho de Melo1-4/+18
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
2005-09-09[CCID3] Use ELAPSED_TIME in the HC TX RTT estimationArnaldo Carvalho de Melo1-3/+7
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
2005-09-09[DCCP] Give precedence to the biggest ELAPSED_TIMEArnaldo Carvalho de Melo1-16/+18
We can get this value in an TIMESTAMP_ECHO and/or in an ELAPSED_TIME option, if receiving both give precendence to the biggest one. In my tests they are very close if not equal at all times, so we may well think about removing the code in CCID3 that inserts this option and leaving this to the core, and perhaps even use just TIMESTAMP_ECHO including the elapsed time. Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
2005-09-09[CCID3] Calculate ccid3hcrx_x_recv using usecs_divArnaldo Carvalho de Melo1-5/+2
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
2005-09-09[CCID] Only call the HC insert_options methods when requestedArnaldo Carvalho de Melo2-4/+12
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
2005-09-09[CCID3] Avoid unsigned integer overflows in usecs_divArnaldo Carvalho de Melo1-3/+13
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
2005-08-30[CCID3]: Call sk->sk_write_space(sk) when receiving a feedback packetArnaldo Carvalho de Melo4-0/+20
This makes the send rate calculations behave way more closely to what is specified, with the jitter previously seen on x and x_recv disappearing completely on non lossy setups. This resembles the tcp_data_snd_check code, that possibly we'll end up using in DCCP as well, perhaps moving this code to inet_connection_sock. For now I'm doing the simplest implementation tho. Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2005-08-30[DCCP]: Introduce DCCP_SOCKOPT_PACKET_SIZEArnaldo Carvalho de Melo2-10/+54
So that applications can set dccp_sock->dccps_pkt_size, that in turn is used in the CCID3 half connection init routines to set ccid3hc[tr]x_s and use it in its rate calculations. Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2005-08-30[CCID3]: Move ccid3_hc_rx_detect_loss to packet_history.cArnaldo Carvalho de Melo3-79/+89
Renaming it to dccp_rx_hist_detect_loss. Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2005-08-30[CCID3]: Move ccid3_hc_rx_add_hist to packet_history.cArnaldo Carvalho de Melo4-126/+124
Renaming it to dccp_rx_hist_add_packet. Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2005-08-30[DCCP]: Move the calc_X routines to dccp_tfrc_libArnaldo Carvalho de Melo4-620/+672
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2005-08-30[DCCP]: Introduce dccp_tfrc_lib module with net/dccp/ccids/lib/*.cArnaldo Carvalho de Melo4-1/+16
I'll now take a look at the other proposed TFRC DCCP CCIDs to find more code that is now in ccid3.c and move to this module, the loss event rate, calc_X, etc most probably will be moved there. The main goal of these changes is to pave the way for the implementation of more TFRC based DCCP CCIDs and to shrink ccid3.c, reducing its complexity and helping in getting it rock solid. Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2005-08-30[DCCP]: Just move packet_history.[ch] to net/dccp/ccids/lib/Arnaldo Carvalho de Melo5-4/+4
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2005-08-30[CCID3]: Move the loss interval code to loss_interval.[ch]Arnaldo Carvalho de Melo5-139/+234
And put this into net/dccp/ccids/lib/, where packet_history.[ch] will also be moved and then we'll have a tfrc_lib.ko module that will be used by dccp_ccid3.ko and other CCIDs that are variations of TFRC (RFC 3448). Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2005-08-30[CCID3]: Move the CCID3 defines to ccid3.hArnaldo Carvalho de Melo2-38/+39
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2005-08-30[CCID3]: Introduce usecs_divArnaldo Carvalho de Melo1-70/+39
To avoid open coding this all over the place. Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2005-08-30[CCID3]: Reorganise timeval handlingArnaldo Carvalho de Melo3-78/+98
Introducing functions to add to or subtract from a timeval variable and renaming now_delta to timeval_new_delta that calls do_gettimeofday and then timeval_delta, that should be used when there are several deltas made relative to the current time or setting variables to it, so as to avoid calling do_gettimeofday excessively. I'm leaving these "timeval_" prefixed funcions internal to DCCP for a while till we're sure there are no subtle bugs in it. It also is more correct as it checks if the number of usecs added to or subtracted from a tv_usec field is more than 2 seconds. Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2005-08-30[CCID3]: Reflow to mostly fit under 80 columnsArnaldo Carvalho de Melo1-114/+176
No code changes. Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2005-08-30[DCCP]: Introduce dccp_wait_for_ccid and use it in dccp_write_xmitArnaldo Carvalho de Melo4-6/+62
This is not quite what I think we should have long term but improves performance for now, so lets use it till we get CCID3 working well, then we can think about using sk_write_queue, perhaps using some ideas from Juwen Lai's old stack for 2.4.20. Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2005-08-30[DCCP]: Make the Debug Menu available when DCCP is statically linked tooArnaldo Carvalho de Melo1-2/+2
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2005-08-30[NET]: use __read_mostly on kmem_cache_t , DEFINE_SNMP_STAT pointersEric Dumazet2-2/+2
This patch puts mostly read only data in the right section (read_mostly), to help sharing of these data between CPUS without memory ping pongs. On one of my production machine, tcp_statistics was sitting in a heavily modified cache line, so *every* SNMP update had to force a reload. Signed-off-by: Eric Dumazet <dada1@cosmosbay.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2005-08-30[DCCP]: Initial dccp_poll implementationArnaldo Carvalho de Melo2-1/+59
Tested with a patched netcat, no horror stories so far 8) Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2005-08-30[DCCP]: Call the HC exit routines at dccp_v4_destroy_sockArnaldo Carvalho de Melo1-0/+2
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2005-08-30[DCCP]: Introduce dccp_get_infoArnaldo Carvalho de Melo3-1/+70
And also hc_tx and hc_rx get_info functions for the CCIDs to fill in information that is specific to them. For now reusing struct tcp_info, later I'll try to figure out a better solution, for now its really nice to get this kind of info: [root@qemu ~]# ./ss -danemi State Recv-Q Send-Q Local Addr:Port Peer Addr:Port LISTEN 0 0 *:5001 *:* ino:628 sk:c1340040 mem:(r0,w0,f0,t0) cwnd:0 ssthresh:0 ESTAB 0 0 172.20.0.2:5001 172.20.0.1:32785 ino:629 sk:c13409a0 mem:(r0,w0,f0,t0) ts rto:1000 rtt:0.004/0 cwnd:0 ssthresh:0 rcv_rtt:61.377 This, for instance, shows that we're not congestion controlling ACKs, as the above output is in the ttcp receiving host, and ttcp is a one way app, i.e. the received never calls sendmsg, so ccid_hc_tx_send_packet is never called, so the TX half connection stays in TFRC_SSTATE_NO_SENT state and hctx_rtt is never calculated, stays with the value set in ccid3_hc_tx_init, 4us, as show above in milliseconds (0.004ms), upcoming patches will fix this. rcv_rtt seems sane tho, matching ping results :-) Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2005-08-30[CCID3]: Calculate the RTT in the RX half connectionArnaldo Carvalho de Melo1-29/+38
Using TIMESTAMP_ECHO and ELAPSED_TIME options received. Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2005-08-30[DCCP]: Export dccp_insert_option_timestamp to CCIDsArnaldo Carvalho de Melo2-4/+6
And don't insert a TIMESTAMP option in all packets, leave the decision to the CCIDs. Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2005-08-30[CCID]: Make ccid_hc_[rt]x_exit accept NULL argumentsArnaldo Carvalho de Melo1-2/+4
Just like kfree, etc it will just not call the CCID exit routines when the private data area is set to NULL. Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2005-08-30[DCCP]: Send a DATAACK packet when we have a TIMESTAMP_ECHO pendingArnaldo Carvalho de Melo1-0/+1
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2005-08-30[DCCP]: Fix skb leak in dccp_sendmsgArnaldo Carvalho de Melo1-0/+12
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2005-08-30[DCCP]: Implement the CLOSING timerArnaldo Carvalho de Melo4-31/+46
So that we retransmit CLOSE/CLOSEREQ packets till they elicit an answer or we hit a timeout. Most of the machinery uses TCP approaches, this code has to be polished & audited, but this is better than we had before. Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2005-08-30[DCCP]: Fix printf format warnings on 64-bit.David S. Miller1-2/+8
Signed-off-by: David S. Miller <davem@davemloft.net>
2005-08-30[DCCP]: Fix ackno setting in SYNC/SYNCACK packetsArnaldo Carvalho de Melo1-7/+3
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2005-08-30[DCCP]: Fix the ACK and SEQ window variables settingsArnaldo Carvalho de Melo5-10/+41
This is from a first audit, more eyeballs are more than welcome. Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2005-08-30[DCCP]: Give more info on Step 6 failure debug printkArnaldo Carvalho de Melo1-2/+9
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2005-08-30[DCCP]: Fix seqno setting in dccp_v4_ctl_send_resetArnaldo Carvalho de Melo1-1/+7
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2005-08-30[CCID3]: Reintroduce ccid3hctx_t_rtoArnaldo Carvalho de Melo2-5/+6
CCID3 keeps this variable in usecs, inet_connection_socks in jiffies, so to avoid Mars orbiter losses lets reintroduce ccid3hctx_t_rto 8) Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2005-08-30[DCCP]: Fix the timestamp optionsIan McDonald3-40/+78
This changes timestamp, timestamp echo, and elapsed time to use units of 10 usecs as per DCCP spec. This has been tested to verify that times are correct. Also fixed up length and used hton/ntoh more. Still to add in later patches: - actually use elapsed time to adjust RTT (commented out as was prior to this patch) - send options at times more closely following the spec (content is now correct) Signed-off-by: Ian McDonald <iam4@cs.waikato.ac.nz> Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2005-08-30[DCCP]: Use LIMIT_NETDEBUG in some debugging printksArnaldo Carvalho de Melo2-15/+19
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2005-08-30[DCCP]: Set dccp_ctl_socket to NULL in dccp_ctl_sock_exitArnaldo Carvalho de Melo1-1/+3
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2005-08-30[DCCP]: Fix elapsed time option as per section 13.2 of spec v11Ian McDonald1-4/+1
The elapsed time can be two bytes or four bytes only. Signed-off-by: Ian McDonald <iam4@cs.waikato.ac.nz> Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2005-08-30[DCCP]: Send SYNCACK packets in response to SYNC packetsArnaldo Carvalho de Melo4-19/+40
Also fix step 6 when receiving SYNC or SYNCACK packets, i.e. we were not using the updated swl. Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2005-08-30[DCCP]: Fix compiler warningsPatrick McHardy2-7/+6
may be a false warning if there always is something on ccid3hcrx_hist: net/dccp/ccids/ccid3.c: In function 'ccid3_hc_rx_packet_recv': net/dccp/ccids/ccid3.c:1634: warning: 'tstamp.tv_usec' may be used uninitialized in this function net/dccp/ccids/ccid3.c:1634: warning: 'tstamp.tv_sec' may be used uninitialized in this function const on inline functions doesn't have any effect: net/dccp/dccp.h:64: warning: type qualifiers ignored on function return type net/dccp/dccp.h:70: warning: type qualifiers ignored on function return type net/dccp/dccp.h:76: warning: type qualifiers ignored on function return type Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2005-08-30[DCCP]: Fix sparse warningsArnaldo Carvalho de Melo6-24/+32
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2005-08-30[DCCP]: Fix RESET handling in dccp_rcv_state_processArnaldo Carvalho de Melo1-18/+42
To avoid holding TIMEWAIT state for sockets in the LISTEN state. Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2005-08-30[DCCP]: Introduce the DCCP Kernel hacking menuArnaldo Carvalho de Melo5-21/+56
Only available if CONFIG_DEBUG_KERNEL is enabled in the "Kernel Hacking" Menu. Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2005-08-30[DCCP]: Rewrite dccp_sendmsg to be more like UDPArnaldo Carvalho de Melo1-155/+59
Based on discussions with Nishida-san. Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2005-08-30[DCCP]: Just reflow the source code to fit in 80 columnsArnaldo Carvalho de Melo11-258/+430
Andrew Morton should be happy now 8) Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2005-08-30[PACKET_HISTORY]: Add dccphtx_rtt and rename the win_count fieldsArnaldo Carvalho de Melo2-17/+18
As requested by Ian. Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com> Signed-off-by: Ian McDonald <iam4@cs.waikato.ac.nz> Signed-off-by: David S. Miller <davem@davemloft.net>
2005-08-30[INET_DIAG]: Move the tcp_diag interface to the proper placeArnaldo Carvalho de Melo2-6/+6
With this the previous setup is back, i.e. tcp_diag can be built as a module, as dccp_diag and both share the infrastructure available in inet_diag. If one selects CONFIG_INET_DIAG as module CONFIG_INET_TCP_DIAG will also be built as a module, as will CONFIG_INET_DCCP_DIAG, if CONFIG_IP_DCCP was selected static or as a module, if CONFIG_INET_DIAG is y, being statically linked CONFIG_INET_TCP_DIAG will follow suit and CONFIG_INET_DCCP_DIAG will be built in the same manner as CONFIG_IP_DCCP. Now to aim at UDP, converting it to use inet_hashinfo, so that we can use iproute2 for UDP sockets as well. Ah, just to show an example of this new infrastructure working for DCCP :-) [root@qemu ~]# ./ss -dane State Recv-Q Send-Q Local Address:Port Peer Address:Port LISTEN 0 0 *:5001 *:* ino:942 sk:cfd503a0 ESTAB 0 0 127.0.0.1:5001 127.0.0.1:32770 ino:943 sk:cfd50a60 ESTAB 0 0 127.0.0.1:32770 127.0.0.1:5001 ino:947 sk:cfd50700 TIME-WAIT 0 0 127.0.0.1:32769 127.0.0.1:5001 timer:(timewait,3.430ms,0) ino:0 sk:cf209620 Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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