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* [DCCP]: Allocation in atomic contextGerrit Renker2007-08-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This fixes the following bug reported in syslog: [ 4039.051658] BUG: sleeping function called from invalid context at /usr/src/davem-2.6/mm/slab.c:3032 [ 4039.051668] in_atomic():1, irqs_disabled():0 [ 4039.051670] INFO: lockdep is turned off. [ 4039.051674] [<c0104c0f>] show_trace_log_lvl+0x1a/0x30 [ 4039.051687] [<c0104d4d>] show_trace+0x12/0x14 [ 4039.051691] [<c0104d65>] dump_stack+0x16/0x18 [ 4039.051695] [<c011371e>] __might_sleep+0xaf/0xbe [ 4039.051700] [<c0157b66>] __kmalloc+0xb1/0xd0 [ 4039.051706] [<f090416f>] ccid2_hc_tx_alloc_seq+0x35/0xc3 [dccp_ccid2] [ 4039.051717] [<f09048d6>] ccid2_hc_tx_packet_sent+0x27f/0x2d9 [dccp_ccid2] [ 4039.051723] [<f085486b>] dccp_write_xmit+0x1eb/0x338 [dccp] [ 4039.051741] [<f085603d>] dccp_sendmsg+0x113/0x18f [dccp] [ 4039.051750] [<c03907fc>] inet_sendmsg+0x2e/0x4c [ 4039.051758] [<c033a47d>] sock_aio_write+0xd5/0x107 [ 4039.051766] [<c015abc1>] do_sync_write+0xcd/0x11c [ 4039.051772] [<c015b296>] vfs_write+0x118/0x11f [ 4039.051840] [<c015b932>] sys_write+0x3d/0x64 [ 4039.051845] [<c0103e7c>] syscall_call+0x7/0xb [ 4039.051848] ======================= The problem was that GFP_KERNEL was used; fixed by using gfp_any(). Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk> Signed-off-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* [DCCP]: fix memory leak and clean up style - dccp_feat_empty_confirm()Jesper Juhl2007-08-14
| | | | | | | | | | | | | | | | | There's a memory leak in net/dccp/feat.c::dccp_feat_empty_confirm(). If we hit the 'default:' case of the 'switch' statement, then we return without freeing 'opt', thus leaking 'struct dccp_opt_pend' bytes. The leak is fixed easily enough by adding a kfree(opt); before the return statement. The patch also changes the layout of the 'switch' to be more in line with CodingStyle. Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com> Acked-by: Ian McDonald <ian.mcdonald@jandi.co.nz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [DCCP]: fix theoretical ccids_{read,write}_lock() raceOleg Nesterov2007-08-14
| | | | | | | | | | Make sure that spin_unlock_wait() is properly ordered wrt atomic_inc(). (akpm: can't we convert this code to use rwlocks?) Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* mm: Remove slab destructors from kmem_cache_create().Paul Mundt2007-07-19
| | | | | | | | | | | | | | Slab destructors were no longer supported after Christoph's c59def9f222d44bb7e2f0a559f2906191a0862d7 change. They've been BUGs for both slab and slub, and slob never supported them either. This rips out support for the dtor pointer from kmem_cache_create() completely and fixes up every single callsite in the kernel (there were about 224, not including the slab allocator definitions themselves, or the documentation references). Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* Merge branch 'master' of ↵Linus Torvalds2007-07-19
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 * 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6: (25 commits) [TG3]: Fix msi issue with kexec/kdump. [NET] XFRM: Fix whitespace errors. [NET] TIPC: Fix whitespace errors. [NET] SUNRPC: Fix whitespace errors. [NET] SCTP: Fix whitespace errors. [NET] RXRPC: Fix whitespace errors. [NET] ROSE: Fix whitespace errors. [NET] RFKILL: Fix whitespace errors. [NET] PACKET: Fix whitespace errors. [NET] NETROM: Fix whitespace errors. [NET] NETFILTER: Fix whitespace errors. [NET] IPV4: Fix whitespace errors. [NET] DCCP: Fix whitespace errors. [NET] CORE: Fix whitespace errors. [NET] BLUETOOTH: Fix whitespace errors. [NET] AX25: Fix whitespace errors. [PATCH] mac80211: remove rtnl locking in ieee80211_sta.c [PATCH] mac80211: fix GCC warning on 64bit platforms [GENETLINK]: Dynamic multicast groups. [NETLIKN]: Allow removing multicast groups. ...
| * [NET] DCCP: Fix whitespace errors.YOSHIFUJI Hideaki2007-07-18
| | | | | | | | Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
* | jprobes: remove JPROBE_ENTRY()Michael Ellerman2007-07-19
|/ | | | | | | | | | | | | | | | AFAICT now that jprobe.entry is a void *, JPROBE_ENTRY doesn't do anything useful - so remove it .. I've left a do-nothing version so that out-of-tree jprobes code will still compile without modifications. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Cc: Prasanna S Panchamukhi <prasanna@in.ibm.com> Acked-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Cc: David S. Miller <davem@davemloft.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* [IPV6]: Do not send RH0 anymore.YOSHIFUJI Hideaki2007-07-11
| | | | | | | Based on <draft-ietf-ipv6-deprecate-rh0-00.txt>. Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [DCCP]: Make struct dccp_li_cachep static.Adrian Bunk2007-07-11
| | | | | | Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [CCID3]: Fix a bug in the send time processingGerrit Renker2007-07-11
| | | | | | | | | | | | | | | | | | ccid3_hc_tx_send_packet currently returns 0 when the time difference between current time and t_nom is less than 1000 microseconds. In this case the packet is sent immediately; but, unlike other packets that can be emitted on first attempt, it will not have its window counter updated and its options set as required. This is a bug. Fix: Require the time difference to be at least 1000 microseconds. The algorithm then converges: time differences > 1000 microseconds trigger the timer in dccp_write_xmit; after timer expiry this function is tried again; when the time difference is less than 1000, the packet will have its options added and window counter updated as required. Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk> Signed-off-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
* [CCID3]: Sending time: update to ktime_tGerrit Renker2007-07-11
| | | | | | | | | | | This updates the computation of t_nom and t_last_win_count to use the newer gettimeofday interface. Committer note: used ktime_to_timeval to set the 'now' variable to t_ld in ccid3hctx_no_feedback_timer Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk> Signed-off-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
* loss_interval: make struct dccp_li_hist_entry privateArnaldo Carvalho de Melo2007-07-11
| | | | | | net/dccp/ccids/lib/loss_interval.c is the only place where this struct is used. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* loss_interval: Nuke dccp_li_histArnaldo Carvalho de Melo2007-07-11
| | | | | | | | It had just a slab cache, so, for the sake of simplicity just make dccp_trfc_lib module init routine create the slab cache, no need for users of the lib to create a private loss_interval object. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* loss_interval: Make dccp_li_hist_entry_{new,delete} privateArnaldo Carvalho de Melo2007-07-11
| | | | | | Not used outside the loss_interval code anymore. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* loss_interval: unexport dccp_li_hist_interval_newArnaldo Carvalho de Melo2007-07-11
| | | | | | Now its only used inside the loss_interval code. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* [DCCP] loss_interval: Move ccid3_hc_rx_update_li to loss_intervalArnaldo Carvalho de Melo2007-07-11
| | | | | | | | Renaming it to dccp_li_update_li. Also based on previous work by Ian McDonald. Signed-off-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
* [CCID3]: Pass ccid3_li_hist to ccid3_hc_rx_update_liArnaldo Carvalho de Melo2007-07-11
| | | | | | | | Now ccid3_hc_rx_update_li is ready to be moved to net/dccp/ccids/lib/loss_interval, it uses the same interface as the other functions there. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* Remove accesses to ccid3_hc_rx_sock in ccid3_hc_rx_{update,calc_first}_liArnaldo Carvalho de Melo2007-07-11
| | | | | | | | | This is a preparatory patch for moving these loss interval functions from net/dccp/ccids/ccid3.c to net/dccp/ccids/lib/loss_interval.c. Based on a patch by Ian McDonald. Signed-off-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
* loss_interval: Fix timeval initialisationIan McDonald2007-07-11
| | | | | | | | When compiling with EXTRA_CFLAGS=-W noticed that tstamp is not initialised correctly in dccp_li_calc_first_li. Signed-off-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net> Signed-off-by: Ian McDonald <ian.mcdonald@jandi.co.nz>
* Fix dccp_sum_coverageIan McDonald2007-07-11
| | | | | | | | When compiling with EXTRA_CFLAGS=-W notice that we have signed/unsigned issue in dccp.h. Signed-off-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net> Signed-off-by: Ian McDonald <ian.mcdonald@jandi.co.nz>
* ccid3: Update copyrightsIan McDonald2007-07-11
| | | | | Signed-off-by: Ian McDonald <ian.mcdonald@jandi.co.nz> Signed-off-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
* [NET]: Fix comparisons of unsigned < 0.Bill Nottingham2007-06-03
| | | | | | | | Recent gcc versions emit warnings when unsigned variables are compared < 0 or >= 0. Signed-off-by: Bill Nottingham <notting@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [XFRM]: Allow packet drops during larval state resolution.David S. Miller2007-05-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The current IPSEC rule resolution behavior we have does not work for a lot of people, even though technically it's an improvement from the -EAGAIN buisness we had before. Right now we'll block until the key manager resolves the route. That works for simple cases, but many folks would rather packets get silently dropped until the key manager resolves the IPSEC rules. We can't tell these folks to "set the socket non-blocking" because they don't have control over the non-block setting of things like the sockets used to resolve DNS deep inside of the resolver libraries in libc. With that in mind I coded up the patch below with some help from Herbert Xu which provides packet-drop behavior during larval state resolution, controllable via sysctl and off by default. This lays the framework to either: 1) Make this default at some point or... 2) Move this logic into xfrm{4,6}_policy.c and implement the ARP-like resolution queue we've all been dreaming of. The idea would be to queue packets to the policy, then once the larval state is resolved by the key manager we re-resolve the route and push the packets out. The packets would timeout if the rule didn't get resolved in a certain amount of time. Signed-off-by: David S. Miller <davem@davemloft.net>
* [DCCP]: Fix build warning when debugging is disabled.David S. Miller2007-05-24
| | | | Signed-off-by: David S. Miller <davem@davemloft.net>
* [DCCP]: Use menuconfig objects.Jan Engelhardt2007-05-24
| | | | | | | | | Use menuconfigs instead of menus, so the whole menu can be disabled at once instead of going through all options. Signed-off-by: Jan Engelhardt <jengelh@gmx.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [NET]: SPIN_LOCK_UNLOCKED cleanup in drivers/atm, netMilind Arun Choudhary2007-04-26
| | | | | | | | SPIN_LOCK_UNLOCKED cleanup,use __SPIN_LOCK_UNLOCKED instead Signed-off-by: Milind Arun Choudhary <milindchoudhary@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [DCCP]: Debug statements for Elapsed Time optionGerrit Renker2007-04-26
| | | | | | | | | | This prints the value of the parsed Elapsed Time when received via a Timestamp Echo option [RFC 4342, 13.3]. Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk> Acked-by: Ian McDonald <ian.mcdonald@jandi.co.nz> Signed-off-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* [DCCP]: Fix bug in the calculation of very low sending ratesGerrit Renker2007-04-26
| | | | | | | | | | | | | | | | | | | | | | | This fixes an error in the calculation of t_ipi when X converges towards very low sending rates (between 1 and 64 bytes per second). Although this case may not sound likely, it can be reproduced by connecting, hitting enter (1 byte sent) and waiting for some time, during which the nofeedback timer halves the sending rate until finally it reaches the region 1..64 bytes/sec. Computing X is handled correctly (tested separately); but by dividing X _before_ entering the calculation of t_ipi, X becomes zero as a result. This in turn triggers a BUG condition caught in scaled_div(). Fixed by replacing with equivalent statement and explicit typecast for good measure. Calculation verified and effect of patch tested - reduced never below 1 byte per 64 seconds afterwards, i.e. not allowing divide-by-zero. Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk> Acked-by: Ian McDonald <ian.mcdonald@jandi.co.nz> Signed-off-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* [CCID3]: Use initial RTT sample from SYN exchangeGerrit Renker2007-04-26
| | | | | | | | | | | | | | | The patch follows the following recommendation made in an erratum to RFC 4342: "Senders MAY additionally make use of other available RTT measurements, including those from the initial Request-Response packet exchange." It implements larger initial windows with regard to this inital RTT measurement, using the mechanism suggested in draft-ietf-dccp-rfc3448bis, section 4.2. Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk> Signed-off-by: Ian McDonald <ian.mcdonald@jandi.co.nz> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [DCCP]: Sample RTT from SYN exchangeGerrit Renker2007-04-26
| | | | Function:
* [CCID3]: Use function for RTT samplingGerrit Renker2007-04-26
| | | | | | | | | | This replaces the existing occurrences of RTT sampling with the use of the new function dccp_sample_rtt. Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk> Signed-off-by: Ian McDonald <ian.mcdonald@jandi.co.nz> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [DCCP]: Provide function for RTT samplingGerrit Renker2007-04-26
| | | | | | | | | | | | | | A recurring problem, in particular in the CCID code, is that RTT samples from packets with timestamp echo and elapsed time options need to be taken. This service is provided via a new function dccp_sample_rtt in this patch. Furthermore, to protect against `insane' RTT samples, the sampled value is bounded between 100 microseconds and 4 seconds - for which u32 is sufficient. Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk> Signed-off-by: Ian McDonald <ian.mcdonald@jandi.co.nz> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [CCID3]: Handle Idle and Application-Limited periodsGerrit Renker2007-04-26
| | | | | | | This updates the code with regard to handling idle and application-limited periods as specified in [RFC 4342, 5.1]. Background:
* [CCID3]: Wrap computation of RFC3390-initial rate into separate functionGerrit Renker2007-04-26
| | | | | | | | | | | | | | | The CCID 3 and TFRC specs (RFC 4342, RFC 3448, draft-3448bis) make frequent reference to the computation of the RFC-3390 initial sending rate: 1. Initial sending rate when RTT is known (RFC 4342, p. 6) 2. Response to Idle/Application-Limited periods (RFC 4342, 5.1) This warrants putting the code into its own function, for later code reuse. Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk> Signed-off-by: Ian McDonald <ian.mcdonald@jandi.co.nz> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [CCID3]: Remove build warnings for 64bitGerrit Renker2007-04-26
| | | | | | | | | | | | | This clears the following sparc64 build warnings: 1) warning: format "%ld" expects type "long int", but argument 3 has type "suseconds_t" 2) warning: format "%llu" expects type "long long unsigned int", but argument 3 has type "__u64" Fixed by using typecast to unsigned. This is argued to be safe, since the quantities, after de-scaling (factor 2^6) fit all in u32. Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk> Signed-off-by: Ian McDonald <ian.mcdonald@jandi.co.nz> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [CCID3]: More to see in dccp_probeGerrit Renker2007-04-26
| | | | | | | | | | | | | | | | This adds a few more fields of interest to /proc/net/dccpprobe, the following output ensues: 1 2 3 4 5 6 7 8 9 10 11 sec.usec src:sport dst:dport size s rtt p X_calc X_recv X t_ipi Also made the formatting consistent. Scripts that go with this can be downloaded from http://139.133.210.30/users/gerrit/dccp/dccp_probe/ Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk> Acked-by: Ian McDonald <ian.mcdonald@jandi.co.nz> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [DCCP]: More debug information for dccp_wait_for_ccidGerrit Renker2007-04-26
| | | | | | | | | | | This adds more detail in the wait_for_ccid packet scheduling loop. In particular, it informs about (i) when delay is used and (ii) why a packet is discarded. Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk> Signed-off-by: Ian McDonald <ian.mcdonald@jandi.co.nz> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [DCCP]: Always use debug-toggle parametersGerrit Renker2007-04-26
| | | | | | | | | | | | | | | | | Currently debugging output (when configured) is automatically enabled when DCCP modules are compiled into the kernel rather than built as loadable modules. This is not necessary, since the module parameters in this case become kernel commandline parameters, e.g. DCCP or CCID3 debug output can be enabled for a static build by appending the following at the boot prompt: dccp.dccp_debug=1 dccp_ccid3.ccid3_debug=1 This patch therefore does away with the more complicated way of always enabling debug output for static builds Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [CCID3]: Remove race condition and update t_ipi when `s' changesGerrit Renker2007-04-26
| | | | | | | | | | | | | | | This: 1. removes a race condition in the access to the scheduled send time t_nom which results from allowing asynchronous r/w access to t_nom without locks; 2. updates the inter-packet interval t_ipi = s/X when `s' changes, following a suggestion by Ian McDonald. Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk> Acked-by: Ian McDonald <ian.mcdonald@jandi.co.nz> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [CCID3]: More verbose debuggingIan McDonald2007-04-26
| | | | | | | | | This adds a few debugging statements to ccid3.c Signed-off-by: Ian McDonald <ian.mcdonald@jandi.co.nz> Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [CCID3]: Fix use of invalid loss intervalsIan McDonald2007-04-26
| | | | | | | | | | This fixes a bug which uses an invalid comparison. The bug resulted in the use of invalid loss intervals. Signed-off-by: Ian McDonald <ian.mcdonald@jandi.co.nz> Acked-by: Gerrit Renker <gerrit@erg.abdn.ac.uk> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [CCID3]: Use MSS for larger initial windowsGerrit Renker2007-04-26
| | | | | | | | | | | | | | | | | | | | This improves the slow-start phase by using the MSS (as suggested in RFC 4342, sec. 5) instead of the packet size s. Also figured out that __u32 is ample resource enough. After applying, I got the following in the logs: ccid3_hc_tx_packet_recv: client(f7421700), s=6, MSS=1424, w_init=4380, R_sample=176us, X=24886363 Had the previous variant been used, w_init would have been as low as 24. Committer note: removed unneeded cast to unsigned long long that was causing a compiler warning on 64bit architectures. Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk> Acked-by: Ian McDonald <ian.mcdonald@jandi.co.nz> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [CCID3]: Re-order CCID 3 source fileGerrit Renker2007-04-26
| | | | | | | | | | | No code change at all. This splits ccid3.c into a RX and a TX section, so that the file has an organisation similar to the other ones (e.g. packet_history.{h,c}). Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk> Acked-by: Ian McDonald <ian.mcdonald@jandi.co.nz> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [CCID3]: Remove redundant `len' testGerrit Renker2007-04-26
| | | | | | | | | | | Since CCID3 avoids sending 0-byte data packets (cf. ccid3_hc_tx_send_packet), testing for zero-payload length, as performed by ccid3_hc_tx_update_s, is redundant - hence removed by this patch. Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk> Acked-by: Ian McDonald <ian.mcdonald@jandi.co.nz> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [DCCP]: Remove ambiguity in the way before48 is usedGerrit Renker2007-04-26
| | | | | | | | | | | | | | | | | This removes two ambiguities in employing the new definition of before48, following the analysis on http://www.mail-archive.com/dccp@vger.kernel.org/msg01295.html (1) Updating GSR when P.seqno >= S.SWL With the old definition we did not update when P.seqno and S.SWL are 2^47 apart. To ensure the same behaviour as with the old definition, this is replaced with the equivalent condition dccp_delta_seqno(S.SWL, P.seqno) >= 0 (2) Sending SYNC when P.seqno >= S.OSR Here it is debatable whether the new definition causes an ambiguity: the case is similar to (1); and to have consistency with the case (1), we use the equivalent condition dccp_delta_seqno(S.OSR, P.seqno) >= 0 Detailed Justification
* [DCCP]: Fix for follows48Gerrit Renker2007-04-26
| | | | | | | | | | | | | | | | | The follows48 relation identifies whether 48-bit sequence number x is the direct successor of y. Currently, it does not handle cases of the following type correctly: follows48(0x(prefix)10000LL, 0x(prefix)0FFFFLL) where prefix is an arbitrary hex sequence of up to 7 digits. This is fixed by reusing the new dccp_delta_seqno function. Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk> Acked-by: Ian McDonald <ian.mcdonald@jandi.co.nz> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [DCCP]: Make `before' relation unambiguousGerrit Renker2007-04-26
| | | | Problem:
* [DCCP]: Make dccp_delta_seqno return signed numbersGerrit Renker2007-04-26
| | | | Problem:
* [DCCP]: 48-bit sequence number arithmeticGerrit Renker2007-04-26
| | | | | | | | | | | | | | | | | This patch * organizes the sequence arithmetic functions into one corner of dccp.h * performs a small modification of dccp_set_seqno to make it more widely reusable (now it is safe to use any number, since it performs modulo-2^48 assignment) * adds functions and generic macros for 48-bit sequence arithmetic: --48 bit complement --modulo-48 addition and modulo-48 subtraction --dccp_inc_seqno now a special case of add48 Constants renamed following a suggestion by Arnaldo. Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk> Acked-by: Ian McDonald <ian.mcdonald@jandi.co.nz> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [SK_BUFF]: Introduce icmp_hdr(), remove skb->h.icmphArnaldo Carvalho de Melo2007-04-26
| | | | | Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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