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2014-09-29net: tcp: more detailed ACK events and events for CE marked packetsFlorian Westphal
DataCenter TCP (DCTCP) determines cwnd growth based on ECN information and ACK properties, e.g. ACK that updates window is treated differently than DUPACK. Also DCTCP needs information whether ACK was delayed ACK. Furthermore, DCTCP also implements a CE state machine that keeps track of CE markings of incoming packets. Therefore, extend the congestion control framework to provide these event types, so that DCTCP can be properly implemented as a normal congestion algorithm module outside of the core stack. Joint work with Daniel Borkmann and Glenn Judd. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Daniel Borkmann <dborkman@redhat.com> Signed-off-by: Glenn Judd <glenn.judd@morganstanley.com> Acked-by: Stephen Hemminger <stephen@networkplumber.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-29net: tcp: split ack slow/fast events from cwnd_eventFlorian Westphal
The congestion control ops "cwnd_event" currently supports CA_EVENT_FAST_ACK and CA_EVENT_SLOW_ACK events (among others). Both FAST and SLOW_ACK are only used by Westwood congestion control algorithm. This removes both flags from cwnd_event and adds a new in_ack_event callback for this. The goal is to be able to provide more detailed information about ACKs, such as whether ECE flag was set, or whether the ACK resulted in a window update. It is required for DataCenter TCP (DCTCP) congestion control algorithm as it makes a different choice depending on ECE being set or not. Joint work with Daniel Borkmann and Glenn Judd. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Daniel Borkmann <dborkman@redhat.com> Signed-off-by: Glenn Judd <glenn.judd@morganstanley.com> Acked-by: Stephen Hemminger <stephen@networkplumber.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-29net: tcp: add flag for ca to indicate that ECN is requiredDaniel Borkmann
This patch adds a flag to TCP congestion algorithms that allows for requesting to mark IPv4/IPv6 sockets with transport as ECN capable, that is, ECT(0), when required by a congestion algorithm. It is currently used and needed in DataCenter TCP (DCTCP), as it requires both peers to assert ECT on all IP packets sent - it uses ECN feedback (i.e. CE, Congestion Encountered information) from switches inside the data center to derive feedback to the end hosts. Therefore, simply add a new flag to icsk_ca_ops. Note that DCTCP's algorithm/behaviour slightly diverges from RFC3168, therefore this is only (!) enabled iff the assigned congestion control ops module has requested this. By that, we can tightly couple this logic really only to the provided congestion control ops. Joint work with Florian Westphal and Glenn Judd. Signed-off-by: Daniel Borkmann <dborkman@redhat.com> Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Glenn Judd <glenn.judd@morganstanley.com> Acked-by: Stephen Hemminger <stephen@networkplumber.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-29net: tcp: assign tcp cong_ops when tcp sk is createdFlorian Westphal
Split assignment and initialization from one into two functions. This is required by followup patches that add Datacenter TCP (DCTCP) congestion control algorithm - we need to be able to determine if the connection is moderated by DCTCP before the 3WHS has finished. As we walk the available congestion control list during the assignment, we are always guaranteed to have Reno present as it's fixed compiled-in. Therefore, since we're doing the early assignment, we don't have a real use for the Reno alias tcp_init_congestion_ops anymore and can thus remove it. Actual usage of the congestion control operations are being made after the 3WHS has finished, in some cases however we can access get_info() via diag if implemented, therefore we need to zero out the private area for those modules. Joint work with Daniel Borkmann and Glenn Judd. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Daniel Borkmann <dborkman@redhat.com> Signed-off-by: Glenn Judd <glenn.judd@morganstanley.com> Acked-by: Stephen Hemminger <stephen@networkplumber.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-29net: sched: cls_rcvp, complete rcu conversionJohn Fastabend
This completes the cls_rsvp conversion to RCU safe copy, update semantics. As a result all cases of tcf_exts_change occur on empty lists now. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-29dql: dql_queued() should write first to reduce bus transactionsEric Dumazet
While doing high throughput test on a BQL enabled NIC, I found a very high cost in ndo_start_xmit() when accessing BQL data. It turned out the problem was caused by compiler trying to be smart, but involving a bad MESI transaction : 0.05 │ mov 0xc0(%rax),%edi // LOAD dql->num_queued 0.48 │ mov %edx,0xc8(%rax) // STORE dql->last_obj_cnt = count 58.23 │ add %edx,%edi 0.58 │ cmp %edi,0xc4(%rax) 0.76 │ mov %edi,0xc0(%rax) // STORE dql->num_queued += count 0.72 │ js bd8 I got an incredible 10 % gain [1] by making sure cpu do not attempt to get the cache line in Shared mode, but directly requests for ownership. New code : mov %edx,0xc8(%rax) // STORE dql->last_obj_cnt = count add %edx,0xc0(%rax) // RMW dql->num_queued += count mov 0xc4(%rax),%ecx // LOAD dql->adj_limit mov 0xc0(%rax),%edx // LOAD dql->num_queued cmp %edx,%ecx The TX completion was running from another cpu, with high interrupts rate. Note that I am using barrier() as a soft hint, as mb() here could be too heavy cost. [1] This was a netperf TCP_STREAM with TSO disabled, but GSO enabled. Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-28staging: rtl8192u: ieee80211: Converted symbol to static.Aybuke Ozdemir
This patch fixes this sparse warning: drivers/staging/rtl8192u/ieee80211/ieee80211_crypt_ccmp.c:60:6: warning: symbol 'ieee80211_ccmp_aes_encrypt' was not declared. Should it be static? Signed-off-by: Aybuke Ozdemir <aybuke.147@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-28staging: rtl8192u: Add blank line after variable declarationsGeorgiana Chelu
Fix the following checkpatch.pl warning: WARNING: Missing a blank line after declarations Signed-off-by: Georgiana Chelu <georgiana.chelu93@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-28Staging: rtl8192e: Remove unused variableMahati Chamarthy
This patch removes a variable which has never been used. The following Coccinelle semantic patch was used to make this transformation: @@ type T; identifier i; constant C; @@ - T i; <... when != i - i = C; ...> Signed-off-by: Mahati Chamarthy <mahati.chamarthy@gmail.com> Acked-by: Julia Lawall <julia.lawall@lip6.fr> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-28staging: rtl8192u: Fixed trailing whitespace in copyingEsra Altintas
The following patch fixes the checkpatch.pl error: ERROR: trailing whitespace Signed-off-by: Esra Altintas <es.altintas@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-28staging: rtl8192u: remove space before close parenthesis ")"Roxana Blaj
This fixes the checkpatch.pl error: ERROR: space prohibited before that close parenthesis ')' Signed-off-by: Roxana Blaj <roxanagabriela10@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-28staging: rtl8192u: remove space before semicolonRoxana Blaj
This fixes the checkpatch.pl warning: WARNING: space prohibited before semicolon Signed-off-by: Roxana Blaj <roxanagabriela10@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-28staging: rtl8192u: add space after close brace '}'Roxana Blaj
This fixes the checkpatch.pl error: ERROR: space required after that close brace '}' Signed-off-by: Roxana Blaj <roxanagabriela10@gmail.com> Acked-by: Daniel Baluta <daniel.baluta@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-28staging: slicoss: Fix void function return statements style warningDilek Uzulmez
This fixes "void function return statements are not generally useful" checkpatch.pl warning slicoss.c Signed-off-by: Dilek Uzulmez <dilekuzulmez@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-28staging: rtl8192u: add space before the open parenthesis '('Roxana Blaj
This fixes the checkpatch.pl error: ERROR: space required before the open parenthesis '(' Signed-off-by: Roxana Blaj <roxanagabriela10@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-28Staging: rtl8192e: rtl8192e: Remove assigned unused variableMahati Chamarthy
This patch removes an initialized variable which has never been used. The following Coccinelle semantic patch was used to make this transformation: @e@ identifier i; position p; type T; @@ extern T i@p; @@ type T; identifier i; constant C; position p != e.p; @@ - T i@p; <+... when != i - i = C; ...+> The braces around if and else which become unnecessary after the transformation were also removed. Signed-off-by: Mahati Chamarthy <mahati.chamarthy@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-28staging: octeon: Fix missing blank line warning.Melike Yurtoglu
Fixes "Missing a blank line after declarations" checkpatch.pl warning in ethernet-rgmii.c Signed-off-by: Melike Yurtoglu <aysemelikeyurtoglu@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-28staging: octeon: Removed unnecessary else expression.Dilek Uzulmez
This patch fixes "else is not generally useful after a break or return" checkpatch.pl warning ethernet-util.h Signed-off-by: Dilek Uzulmez <dilekuzulmez@gmail.com> Acked-by: Daniel Baluta <daniel.baluta@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-28staging: octeon: Fix line 80 characters in ethernet.cEsra Altintas
The following patch fixes the checpatch.pl warning: WARNING: line over 80 characters Signed-off-by: Esra Altintas <es.altintas@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-28drivers: staging: gdm72xx: Removed unnecessary braces.Gulsah Kose
This patch fixes "braces {} are not necessary for single statement blocks" checkpatch.pl warning in netlink_k.c Signed-off-by: Gulsah Kose <gulsah.1004@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-28drivers: staging: gdm72xx: Removed unnecessary else expression.Gulsah Kose
This patch fixes "else is not generally useful after a break or return" checkpatch.pl warning in netlink_k.c Signed-off-by: Gulsah Kose <gulsah.1004@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-28staging: gdm724x: Removed unnecessary else expression.Gulsah Kose
This patch fixes "else is not generally useful after a break or return" checkpatch.pl warning in gdm_usb.c Signed-off-by: Gulsah Kose <gulsah.1004@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-28staging: ft1000: ft1000-pcmcia: Add require space after that ','Aybuke Ozdemir
This patch fixes checkpatch.pl error in file ft1000_hw.c ERROR: space required after that ';' (ctx:VxV) Signed-off-by: Aybuke Ozdemir <aybuke.147@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-28staging: ft1000: ft1000-pcmcia: Used "linux" instead of "asm".Gulsah Kose
This patch fixes "Use #include <linux/uaccess.h> instead of <asm/uaccess.h" checkpatch.pl warning in ft1000_dnld.c Signed-off-by: Gulsah Kose <gulsah.1004@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-28staging: ft1000: ft1000-pcmcia: Removed unnecessary else expression.Gulsah Kose
This patch fixes "else is not generally useful after a break or return" checkpatch.pl warning in ft1000_dnld.c Signed-off-by: Gulsah Kose <gulsah.1004@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-28Staging: unisys: common-spar: include: channels: Remove unnecessary semicolonAybuke Ozdemir
This fixes the checkpatch.pl warning: WARNING: macros should not use a trailing semicolon. Signed-off-by: Aybuke Ozdemir <aybuke.147@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-28staging: vt6655: Merge three lines into oneTapasweni Pathak
This patch merges three lines into one, removing unecessary if check. Signed-off-by: Tapasweni Pathak <tapaswenipathak@gmail.com> Reviewed-by: Himangi Saraogi <himangi774@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-28staging: vt6656: Merge three lines into oneTapasweni Pathak
This patch merges three lines into one, removing if branch Signed-off-by: Tapasweni Pathak <tapaswenipathak@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-28staging: vt6655: Type conversion was made.Gulsah Kose
This patch fixes this sparse warning: drivers/staging/vt6655/device_main.c:385:40: warning: mixing different enum types drivers/staging/vt6655/device_main.c:385:40: int enum _VIA_BB_TYPE versus drivers/staging/vt6655/device_main.c:385:40: int enum _VIA_PKT_TYPE Signed-off-by: Gulsah Kose <gulsah.1004@gmail.com> Acked-by: Julia Lawall <julia.lawall@lip6.fr> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-28Staging: vt6655: Add require space before that '('Aybuke Ozdemir
This patch fixes checkpatch.pl error in file device_main.c ERROR: space required before the open parenthesis '(' Signed-off-by: Aybuke Ozdemir <aybuke.147@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-28Staging: vt6655: Add require space after that ','Aybuke Ozdemir
This patch fixes checkpatch.pl error in file device_main.c ERROR: space required after that ';' (ctx:VxV) Signed-off-by: Aybuke Ozdemir <aybuke.147@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-28staging: speakup: Added blank line.Aybuke Ozdemir
This patch fixes "Missing a blank line after declarations" checkpatch.pl warning in selection.c Signed-off-by: Aybuke Ozdemir <aybuke.147@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-28Staging: speakup: Fix trailing spaceAybuke Ozdemir
This patch fixes checkpatch.pl error in file spkguide.txt ERROR: trailing whitespace Signed-off-by: Aybuke Ozdemir <aybuke.147@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-28Staging: wlan-ng: Fix unnecessary space before function pointer argumentsAybuke Ozdemir
This patch fixes these warning messages found by checkpatch.pl: WARNING: Unnecessary space before function pointer arguments Signed-off-by: Aybuke Ozdemir <aybuke.147@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-28staging: rtl8723au: core: Add space after '|'Aybuke Ozdemir
This patch fixes checkpatch.pl error in file rtw_ap.c ERROR: need consistent spacing around '|' (ctx:WxV) Signed-off-by: Aybuke Ozdemir <aybuke.147@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-28staging: rtl8723au: core: Add consistent spacing around '&'Aybuke Ozdemir
This patch fixes checkpatch.pl error in file rtw_ap.c ERROR: need consistent spacing around '&' (ctx:WxV) Signed-off-by: Aybuke Ozdemir <aybuke.147@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-28staging: rtl8723au: hal: Removed unnecessary braces.Aybuke Ozdemir
This patch fixes "braces {} are not necessary for single statement blocks" checkpatch.pl warning in hal_com.c Signed-off-by: Aybuke Ozdemir <aybuke.147@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-28staging: rtl8723au: hal: Fix missing blank line warning.Aybuke Ozdemir
This patch fixes "Missing a blank line after declarations" checkpatch.pl warning in hal_com.c Signed-off-by: Aybuke Ozdemir <aybuke.147@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-28staging: rtl8723au: hal: Fix unnecessary whitespace before a quoted newlineAybuke Ozdemir
Fix checkpatch.pl issues with unnecessary whitespace before a quoted newline in hal_com.c Signed-off-by: Aybuke Ozdemir <aybuke.147@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-28staging: emxx_udc: Fixed else is not usefull warning.Gulsah Kose
This patch fixes "else is not generally useful after a break or return" checkpatch.pl warning in emxx_udc.c Signed-off-by: Gulsah Kose <gulsah.1004@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-28staging: ft1000-usb: use usleep_range instead of msleepCatalina Mocanu
This fixes the following checkpatch.pl warning: WARNING : msleep < 20ms can sleep for up to 20ms; see Documentation/timers/timers-howto.txt Signed-off-by: Catalina Mocanu <catalina.mocanu@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-28staging: ft1000-usb: remove unnecessary return statementCatalina Mocanu
This fixes the following checkpatch.pl warning: WARNING: void function return statements are not generally useful Signed-off-by: Catalina Mocanu <catalina.mocanu@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-28staging: media: omap4iss: Removed unnecessary else expression.Gulsah Kose
This patch fixes "else is not generally useful after a break or return" checkpatch.pl warning iss_resizer.c Signed-off-by: Gulsah Kose <gulsah.1004@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-28staging: media: omap4iss: Removed unnecessary else expression.Gulsah Kose
This patch fixes "else is not generally useful after a break or return" checkpatch.pl warning iss_ipipeif.c Signed-off-by: Gulsah Kose <gulsah.1004@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-28staging: media: omap24xx: Added blank line.Gulsah Kose
This patch fixes "Missing a blank line after declarations" checkpatch.pl warning in tcm825x.c Signed-off-by: Gulsah Kose <gulsah.1004@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-28staging: media: omap24xx: Added new line after declarations.Gulsah Kose
This patch fixes "Missing a blank line after declarations" checkpatch.pl warning in omap24xxcam-dma.c Signed-off-by: Gulsah Kose <gulsah.1004@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-28staging: media: cxd2099: use usleep_range()Tapasweni Pathak
This patch fixes checkpatch.pl warning in file cxd2099.c WARNING : msleep < 20ms can sleep for up to 20ms; see Documentation/timers/timers-howto.txt Signed-off-by: Tapasweni Pathak <tapaswenipathak@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-28Staging: media: davinci_vpfe: Remove unused variableMahati Chamarthy
This patch removes a variable which has never been used. The following Coccinelle semantic patch was used to make this transformation: @@ type T; identifier i; constant C; @@ - T i; <... when != i - i = C; ...> Signed-off-by: Mahati Chamarthy <mahati.chamarthy@gmail.com> Acked-by: Julia Lawall <julia.lawall@lip6.fr> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-28Staging: media: davinci_vpfe: Removed unnecessary out of memory message logging.Heena Sirwani
The following patch removes the checkpatch.pl warning: WARNING: possible unnecessary out of memory message. Signed-off-by: Heena Sirwani <heenasirwani@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-28staging: media: lirc: Removed unnecessary else expression.Gulsah Kose
This patch fixes "else is not generally useful after a break or return" checkpatch.pl warning lirc_parallel.c Signed-off-by: Gulsah Kose <gulsah.1004@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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