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2008-01-29mac80211: remove "bcn_int" and "capab" scan results infoJohn W. Linville1-25/+0
These bits were dead code before "mac80211: Remove local->scan_flags" (commit 6681dd3fd0e4d36a4547415853e83411baa7b705) and probably should have been removed as part of that commit. Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-29mac80211: move A-MSDU identifier to flagsRon Rindjunsky2-4/+4
This patch moves u8 amsdu_frame in ieee80211_txrx_data to the flags section as IEEE80211_TXRXD_RX_AMSDU Signed-off-by: Ron Rindjunsky <ron.rindjunsky@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-29mac80211: adding 802.11n configuration flowsRon Rindjunsky3-0/+86
This patch configures the 802.11n mode of operation internally in ieee80211_conf structure and in the low-level driver as well (through op conf_ht). It does not include AP configuration flows. Signed-off-by: Ron Rindjunsky <ron.rindjunsky@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-29mac80211: adding 802.11n essential A-MSDU Rx capabilityRon Rindjunsky2-0/+125
This patch adds the ability to receive and handle A-MSDU frames. Signed-off-by: Ron Rindjunsky <ron.rindjunsky@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-29mac80211: adding 802.11n essential A-MPDU addBA capabilityRon Rindjunsky1-0/+124
This patch adds the capability to identify and answer an add block ACK request. As this series of patches only adds HT handling with no aggregations, (A-MPDU aggregations acceptance is not obligatory according to 802.11n draft) we are currently sending back a refusal upon this request. Signed-off-by: Ron Rindjunsky <ron.rindjunsky@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-29mac80211: adding 802.11n IEs handlingRon Rindjunsky2-3/+94
This patch presents the ability to parse and compose HT IEs, and to put the IE relevant data inside the mac80211's internal HT structures Signed-off-by: Ron Rindjunsky <ron.rindjunsky@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-29mac80211: adding 802.11n HT framework definitionsRon Rindjunsky1-0/+3
New structures: - ieee80211_ht_info: describing STA's HT capabilities - ieee80211_ht_bss_info: describing BSS's HT characteristics Changed structures: - ieee80211_hw_mode: now also holds PHY HT capabilities for each HW mode - ieee80211_conf: ht_conf holds current self HT configuration ht_bss_conf holds current BSS HT configuration - flag IEEE80211_CONF_SUPPORT_HT_MODE added to indicate if HT use is desired - sta_info: now also holds Peer's HT capabilities Signed-off-by: Ron Rindjunsky <ron.rindjunsky@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-29mac80211: adding MAC80211_HT_DEBUG config variableRon Rindjunsky1-0/+10
This patch adds MAC80211_HT_DEBUG config variable to separate HT debug features Signed-off-by: Ron Rindjunsky <ron.rindjunsky@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-29mac80211: allow setting drop_unencrypted with wextJohannes Berg1-0/+3
This patch allows wpa_supplicant to set the drop_unencrypted setting in mac80211. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-29mac80211: make ieee80211_iterate_active_interfaces not need rtnlJohannes Berg1-3/+4
Interface iteration in mac80211 can be done without holding any locks because I converted it to RCU. Initially, I thought this wouldn't be needed for ieee80211_iterate_active_interfaces but it's turning out that multi-BSS AP support can be much simpler in a driver if ieee80211_iterate_active_interfaces can be called without holding locks. This converts it to use RCU, it adds a requirement that the callback it invokes cannot sleep. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-29mac80211: restructuring data Rx handlersRon Rindjunsky4-66/+86
This patch restructures the Rx handlers chain by incorporating previously handlers ieee80211_rx_h_802_1x_pae and ieee80211_rx_h_drop_unencrypted into ieee80211_rx_h_data, already in 802.3 form. this scheme follows more precisely after the IEEE802.11 data plane archituecture, and will prevent code duplication to IEEE8021.11n A-MSDU handler. added function: - ieee80211_data_to_8023: transfering 802.11 data frames to 802.3 frame - ieee80211_deliver_skb: delivering the 802.3 frames to upper stack eliminated handlers: - ieee80211_rx_h_drop_unencrypted: now function ieee80211_drop_unencrypted - ieee80211_rx_h_802_1x_pae: now function ieee80211_802_1x_pae changed handlers: - ieee80211_rx_h_data: now contains calls to four above function Signed-off-by: Ron Rindjunsky <ron.rindjunsky@intel.com> Acked-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-29mac80211: hardware scan reworkZhu Yi6-35/+70
The scan code in mac80211 makes the software scan assumption in various places. For example, we stop the Tx queue during a software scan so that all the Tx packets will be queued by the stack. We also drop frames not related to scan in the software scan process. But these are not true for hardware scan. Some wireless hardwares (for example iwl3945/4965) has the ability to perform the whole scan process by hardware and/or firmware. The hardware scan is relative powerful in that it tries to maintain normal network traffic while doing a scan in the background. Some drivers (i.e iwlwifi) do provide a way to tune the hardware scan parameters (for example if the STA is associated, what's the max time could the STA leave from the associated channel, how long the scans get suspended after returning to the service channel, etc). But basically this is transparent to the stack. mac80211 should not stop Tx queues or drop Rx packets during a hardware scan. This patch resolves the above problem by spliting the current scan indicator local->sta_scanning into local->sta_sw_scanning and local->sta_hw_scanning. It then changes the scan related code to be aware of hardware scan or software scan in various places. With this patch, iwlwifi performs much better in the scan-while-associated condition and disable_hw_scan=1 should never be required. Cc: Mohamed Abbas <mohamed.abbas@intel.com> Cc: Ben Cahill <ben.m.cahill@intel.com> Signed-off-by: Zhu Yi <yi.zhu@intel.com> Acked-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-29[IPV6]: Cleanup the addconf_sysctl_registerPavel Emelyanov1-8/+8
This only includes fixing the space-indented lines and removing one unneeded else after the goto. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-29[IPV4]: Cleanup the devinet_sysctl_registerPavel Emelyanov1-8/+9
I moved the call to kmalloc() from the *t declaration into the code (this is confusing when a variable is initialized with the result of some call) and removed unneeded comment near the error path. Just like I did with the neigh ctl-s. Besides, I fixed the goto's and the labels - they were indented with spaces :( Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-29[NEIGH]: Use the ctl paths to create neighbours sysctlsPavel Emelyanov1-50/+27
The appropriate path is prepared right inside this function. It is prepared similar to how the ctl tables were. Since the path is modified, it is put on the stack, to avoid possible races with multiple calls to neigh_sysctl_register() : it is called by protocols and I didn't find any protection in this case. Did I overlooked the rtnl lock?. The stack growth of the neigh_sysctl_register() is 40 bytes. I believe this is OK, since this is not that much and this function is not called with the deep stack (device/protocols register). The device's name is stored on the template to free it later. This will help with the net namespaces, as each namespace should have its own set of these ctls. Besides, this saves ~350 bytes from the neigh template :) Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-29[NEIGH]: Cleanup the neigh_sysctl_registerPavel Emelyanov1-15/+11
This mainly removes the err variable, as this call always return the same error code (-ENOBUFS). Besides, I moved the call to kmalloc() from the *t declaration into the code (this is confusing when a variable is initialized with the result of some call) and removed unneeded comment near the error path. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-29[UNIX]: Make the unix sysctl tables per-namespacePavel Emelyanov2-8/+28
This is the core. * add the ctl_table_header on the struct net; * make the unix_sysctl_register and _unregister clone the table; * moves calls to them into per-net init and exit callbacks; * move the .data pointer in the proper place. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Acked-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-29[UNIX]: Use ctl paths to register unix ctl tablesPavel Emelyanov1-19/+5
Unlike previous ones, this patch is useful by its own, as it decreases the vmlinux size :) But it will be used later, when the per-namespace sysctl is added. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Acked-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-29[UNIX]: Move the sysctl_unix_max_dgram_qlenPavel Emelyanov2-4/+4
This will make all the sub-namespaces always use the default value (10) and leave the tuning via sysctl to the init namespace only. Per-namespace tuning is coming. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Acked-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-29[UNIX]: Extend unix_sysctl_(un)register prototypesPavel Emelyanov2-4/+5
Add the struct net * argument to both of them to use in the future. Also make the register one return an error code. It is useless right now, but will make the future patches much simpler. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Acked-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-29[DECNET]: Remove extra memset from dn_fib_check_nhDenis V. Lunev1-2/+0
Signed-off-by: Denis V. Lunev <den@openvz.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-29[IPSEC]: SPD auditing fix to include the netmask/prefix-lengthPaul Moore1-18/+26
Currently the netmask/prefix-length of an IPsec SPD entry is not included in any of the SPD related audit messages. This can cause a problem when the audit log is examined as the netmask/prefix-length is vital in determining what network traffic is affected by a particular SPD entry. This patch fixes this problem by adding two additional fields, "src_prefixlen" and "dst_prefixlen", to the SPD audit messages to indicate the source and destination netmasks. These new fields are only included in the audit message when the netmask/prefix-length is less than the address length, i.e. the SPD entry applies to a network address and not a host address. Example audit message: type=UNKNOWN[1415] msg=audit(1196105849.752:25): auid=0 \ subj=root:system_r:unconfined_t:s0-s0:c0.c1023 op=SPD-add res=1 \ src=192.168.0.0 src_prefixlen=24 dst=192.168.1.0 dst_prefixlen=24 In addition, this patch also fixes a few other things in the xfrm_audit_common_policyinfo() function. The IPv4 string formatting was converted to use the standard NIPQUAD_FMT constant, the memcpy() was removed from the IPv6 code path and replaced with a typecast (the memcpy() was acting as a slow, implicit typecast anyway), and two local variables were created to make referencing the XFRM security context and selector information cleaner. Signed-off-by: Paul Moore <paul.moore@hp.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-29[TFRC]: Hide tx history details from the CCIDsArnaldo Carvalho de Melo3-28/+41
Based on a previous patch by Gerrit Renker. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-29[NET]: Implement the per network namespace sysctl infrastructureEric W. Biederman1-0/+57
The user interface is: register_net_sysctl_table and unregister_net_sysctl_table. Very much like the current interface except there is a network namespace parameter. With this any sysctl registered with register_net_sysctl_table will only show up to tasks in the same network namespace. All other sysctls continue to be globally visible. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Cc: Serge Hallyn <serue@us.ibm.com> Cc: Daniel Lezcano <dlezcano@fr.ibm.com> Cc: Cedric Le Goater <clg@fr.ibm.com> Cc: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-29[NETFILTER]: Convert old checksum helper namesPatrick McHardy11-40/+40
Kill the defines again, convert to the new checksum helper names and remove the dependency of NET_ACT_NAT on NETFILTER. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-29[NET]: Move netfilter checksum helpers to net/core/utils.cPatrick McHardy2-16/+16
This allows to get rid of the CONFIG_NETFILTER dependency of NET_ACT_NAT. This patch redefines the old names to keep the noise low, the next patch converts all users. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-29[DCCP]: Remove duplicate test for CloseReqGerrit Renker1-4/+2
This removes a redundant test for unexpected packet types. In dccp_rcv_state_process it is tested twice whether a DCCP-server has received a CloseReq (Step 7): * first in the combined if-statement, * then in the call to dccp_rcv_closereq(). The latter is necesssary since dccp_rcv_closereq() is also called from __dccp_rcv_established(). This patch removes the duplicate test. 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>
2008-01-29[DCCP]: Integrate state transitions for passive-closeGerrit Renker2-45/+131
This adds the necessary state transitions for the two forms of passive-close * PASSIVE_CLOSE - which is entered when a host receives a Close; * PASSIVE_CLOSEREQ - which is entered when a client receives a CloseReq. Here is a detailed account of what the patch does in each state. 1) Receiving CloseReq The pseudo-code in 8.5 says: Step 13: Process CloseReq If P.type == CloseReq and S.state < CLOSEREQ, Generate Close S.state := CLOSING Set CLOSING timer. This means we need to address what to do in CLOSED, LISTEN, REQUEST, RESPOND, PARTOPEN, and OPEN. * CLOSED: silently ignore - it may be a late or duplicate CloseReq; * LISTEN/RESPOND: will not appear, since Step 7 is performed first (we know we are the client); * REQUEST: perform Step 13 directly (no need to enqueue packet); * OPEN/PARTOPEN: enter PASSIVE_CLOSEREQ so that the application has a chance to process unread data. When already in PASSIVE_CLOSEREQ, no second CloseReq is enqueued. In any other state, the CloseReq is ignored. I think that this offers some robustness against rare and pathological cases: e.g. a simultaneous close where the client sends a Close and the server a CloseReq. The client will then be retransmitting its Close until it gets the Reset, so ignoring the CloseReq while in state CLOSING is sane. 2) Receiving Close The code below from 8.5 is unconditional. Step 14: Process Close If P.type == Close, Generate Reset(Closed) Tear down connection Drop packet and return Thus we need to consider all states: * CLOSED: silently ignore, since this can happen when a retransmitted or late Close arrives; * LISTEN: dccp_rcv_state_process() will generate a Reset ("No Connection"); * REQUEST: perform Step 14 directly (no need to enqueue packet); * RESPOND: dccp_check_req() will generate a Reset ("Packet Error") -- left it at that; * OPEN/PARTOPEN: enter PASSIVE_CLOSE so that application has a chance to process unread data; * CLOSEREQ: server performed active-close -- perform Step 14; * CLOSING: simultaneous-close: use a tie-breaker to avoid message ping-pong (see comment); * PASSIVE_CLOSEREQ: ignore - the peer has a bug (sending first a CloseReq and now a Close); * TIMEWAIT: packet is ignored. Note that the condition of receiving a packet in state CLOSED here is different from the condition "there is no socket for such a connection": the socket still exists, but its state indicates it is unusable. Last, dccp_finish_passive_close sets either DCCP_CLOSED or DCCP_CLOSING = TCP_CLOSING, so that sk_stream_wait_close() will wait for the final Reset (which will trigger CLOSING => CLOSED). 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>
2008-01-29[DCCP]: Dedicated auxiliary states to support passive-closeGerrit Renker1-10/+12
This adds two auxiliary states to deal with passive closes: * PASSIVE_CLOSE (reached from OPEN via reception of Close) and * PASSIVE_CLOSEREQ (reached from OPEN via reception of CloseReq) as internal intermediate states. These states are used to allow a receiver to process unread data before acknowledging the received connection-termination-request (the Close/CloseReq). Without such support, it will happen that passively-closed sockets enter CLOSED state while there is still unprocessed data in the queue; leading to unexpected and erratic API behaviour. PASSIVE_CLOSE has been mapped into TCPF_CLOSE_WAIT, so that the code will seamlessly work with inet_accept() (which tests for this state). The state names are thanks to Arnaldo, who suggested this naming scheme following an earlier revision of this patch. 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>
2008-01-29[DCCP]: Use AF-independent rebuild_header routineGerrit Renker1-1/+1
This fixes a nasty bug: dccp_send_reset() is called by both DCCPv4 and DCCPv6, but uses inet_sk_rebuild_header() in each case. This leads to unpredictable and weird behaviour: under some conditions, DCCPv6 Resets were sent, in other not. The fix is to use the AF-independent rebuild_header routine. 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>
2008-01-29[TFRC]: Migrate TX history to singly-linked lisArnaldo Carvalho de Melo5-187/+102
This patch was based on another made by Gerrit Renker, his changelog was: ------------------------------------------------------ The patch set migrates TFRC TX history to a singly-linked list. The details are: * use of a consistent naming scheme (all TFRC functions now begin with `tfrc_'); * allocation and cleanup are taken care of internally; * provision of a lookup function, which is used by the CCID TX infrastructure to determine the time a packet was sent (in turn used for RTT sampling); * integration of the new interface with the present use in CCID3. ------------------------------------------------------ Simplifications I did: . removing the tfrc_tx_hist_head that had a pointer to the list head and another for the slabcache. . No need for creating a slabcache for each CCID that wants to use the TFRC tx history routines, create a single slabcache when the dccp_tfrc_lib module init routine is called. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-29[TCP]: Two fixes to new sacktag codeIlpo Järvinen1-2/+2
1) Skip condition used to be wrong way around which made SACK processing very broken, missed many blocks because of that. 2) Use highest_sack advancement only if some skbs are already sacked because otherwise tcp_write_queue_next may move things too far (occurs mainly with GSO). The other similar advancement is not problem because highest_sack was previosly put to point a sacked skb. These problems were located because of problem report from Matt Mathis <mathis@psc.edu>. Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-29[NET]: Nicer WARN_ON in netstat_showPavel Emelyanov1-3/+2
The if (statement) WARN_ON(1); looks much better as WARN_ON(statement); Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-29[IPV6]: Add RFC4214 supportFred L. Templin3-1/+100
This patch includes support for the Intra-Site Automatic Tunnel Addressing Protocol (ISATAP) per RFC4214. It uses the SIT module, and is configured using extensions to the "iproute2" utility. The diffs are specific to the Linux 2.6.24-rc2 kernel distribution. This version includes the diff for ./include/linux/if.h which was missing in the v2.4 submission and is needed to make the patch compile. The patch has been installed, compiled and tested in a clean 2.6.24-rc2 kernel build area. Signed-off-by: Fred L. Templin <fred.l.templin@boeing.com> Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-29[NET]: Eliminate unused argument from sk_stream_alloc_pskbPavel Emelyanov2-8/+5
The 3rd argument is always zero (according to grep :) Eliminate it and merge the function with sk_stream_alloc_skb. This saves 44 more bytes, and together with the previous patch we have: add/remove: 1/0 grow/shrink: 0/8 up/down: 183/-751 (-568) function old new delta sk_stream_alloc_skb - 183 +183 ip_rt_init 529 525 -4 arp_ignore 112 107 -5 __inet_lookup_listener 284 274 -10 tcp_sendmsg 2583 2481 -102 tcp_sendpage 1449 1300 -149 tso_fragment 417 258 -159 tcp_fragment 1149 988 -161 __tcp_push_pending_frames 1998 1837 -161 Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-29[NET]: Uninline the sk_stream_alloc_pskbPavel Emelyanov1-0/+27
This function seems too big for inlining. Indeed, it saves half-a-kilo when uninlined: add/remove: 1/0 grow/shrink: 0/7 up/down: 195/-719 (-524) function old new delta sk_stream_alloc_pskb - 195 +195 ip_rt_init 529 525 -4 __inet_lookup_listener 284 274 -10 tcp_sendmsg 2583 2486 -97 tcp_sendpage 1449 1305 -144 tso_fragment 417 267 -150 tcp_fragment 1149 992 -157 __tcp_push_pending_frames 1998 1841 -157 Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-29[IPV4] fib_hash: kmalloc + memset conversion to kzallocJoonwoo Park1-5/+2
fib_hash: kmalloc + memset conversion to kzalloc fix to avoid memset entirely. Signed-off-by: Joonwoo Park <joonwpark81@gmail.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-29[IPV4] fib_semantics: kmalloc + memset conversion to kzallocJoonwoo Park1-7/+3
fib_semantics: kmalloc + memset conversion to kzalloc fix to avoid memset entirely. Signed-off-by: Joonwoo Park <joonwpark81@gmail.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-29[IPSEC]: kmalloc + memset conversion to kzallocJoonwoo Park1-6/+3
2007/11/26, Patrick McHardy <kaber@trash.net>: > How about also switching vmalloc/get_free_pages to GFP_ZERO > and getting rid of the memset entirely while you're at it? > xfrm_hash: kmalloc + memset conversion to kzalloc fix to avoid memset entirely. Signed-off-by: Joonwoo Park <joonwpark81@gmail.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-29[TCP]: Move FRTO checks out from write queue abstraction funcsIlpo Järvinen1-0/+4
Better place exists in update_send_head (other non-queue related adjustments are done there as well) which is the only caller of tcp_advance_send_head (now that the bogus call from mtu_probe is gone). Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-29[NET]: Make macro to specify the ptype_base sizePavel Emelyanov1-9/+14
Currently this size is 16, but as the comment says this is so only because all the chains (except one) has the length 1. I think, that some day this may change, so growing this hash will be much easier. Besides, symbolic names are read better than magic constants. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-29[NET]: Name magic constants in sock_wake_async()Pavel Emelyanov10-28/+28
The sock_wake_async() performs a bit different actions depending on "how" argument. Unfortunately this argument ony has numerical magic values. I propose to give names to their constants to help people reading this function callers understand what's going on without looking into this function all the time. I suppose this is 2.6.25 material, but if it's not (or the naming seems poor/bad/awful), I can rework it against the current net-2.6 tree. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-29[DCCP]: Add support for abortive releaseGerrit Renker1-2/+13
This continues from the previous patch and adds support for actively aborting a DCCP connection, using a Reset Code 2, "Aborted" to inform the peer of an abortive release. I have tried this in various client/server settings and it works as expected. 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>
2008-01-29[DCCP]: Check for unread data on closeGerrit Renker1-2/+8
This removes one FIXME with regard to close when there is still unread data. The mechanism is implemented similar to TCP: with regard to DCCP-specifics, a Reset with Code 2, "Aborted" is sent to the peer. This corresponds in part to RFC 4340, 8.1.1 and 8.1.5. 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>
2008-01-29[CCID2]: Remove misleading commentGerrit Renker1-10/+1
This removes a comment which identifies an `issue' with dccp_write_xmit() where there is none. The comment assumes it is possible that a packet is sent between the calls to ccid_hc_tx_send_packet(), dccp_transmit_skb(), ccid_hc_tx_packet_sent() (in the above order) in dccp_write_xmit(). I think that this is impossible, since dccp_write_xmit() is always called under lock: * when called as dccp_write_xmit(sk, 1) from dccp_send_close(), the socket is locked (see code comment above dccp_send_close()); * when called as dccp_write_xmit(sk, 0) from dccp_send_msg(), it is after lock_sock() has been called; * when called as dccp_write_xmit(sk, 0) from dccp_write_xmit_timer(), bh_lock_sock() has been called and the if/else statement has made sure that sk_lock.owner is not set; * there are no other places where dccp_write_xmit() is called. Furthermore, the debug statement for printing the sequence number of the packet just sent has been removed, since the entire list is being printed anyway and so the entry of that number appears last. 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>
2008-01-29[CCID2]: Remove redundant ack-counting variableGerrit Renker2-35/+17
The code used two different variables to count Acks, one of them redundant. This patch reduces the number of Ack counters to one. The type of the Ack counter has also been changed to u32 (twice the range of int); and the variable has been renamed into `packets_acked' - for consistency with RFC 3465 (and similarly named variables are used by TCP and SCTP). Lastly, a slightly less aggressive `maxincr' increment is used (for even Ack Ratios, maxincr was Ack Ratio/2 + 1 instead of Ack Ratio/2). 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>
2008-01-29[CCID2]: Remove redundant synchronisation variableGerrit Renker2-10/+2
This removes the synchronisation variable `ccid2hctx_sendwait', which is set to 1 when the CCID2 sender may send a new packet, and which is set to 0 otherwise The variable is redundant, since it is only used in combination with the hc_tx_send_packet/ hc_tx_packet_sent function pair. Both functions are called under socket lock, so the following happens when the CCID2 may send a new packet: * it sets sendwait = 1 in tx_send_packet and returns 0; * the subsequent call to tx_packet_sent clears the sendwait flag; * since tx_send_packet returns 0 if and only if sendwait == 1, the BUG_ON condition in tx_packet_sent is never satisfied, since that function is never called when tx_send_packet returns a value different from 0 (cf. dccp_write_xmit); * the call to tx_packet_sent clears the flag so that the condition "!sendwait" is true the next time tx_packet_sent is called. In other words, it is sufficient to just return 0 / not-0 to synchronise tx_send_packet and tx_packet_sent -- which is what the patch does. 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>
2008-01-29[CCID2]: Redundant debugging outputGerrit Renker1-6/+0
This reduces the amount of redundant debugging messages: * pipe/cwnd are printed in both tx_send_packet() and tx_packet_sent(). Both functions are called immediately after one another, so one occurrence is sufficient. * Since tx_packet_sent() prints pipe/cwnd already, the second printk for pipe is redundant. * In tx_packet_sent() the check_sanity function is called twice (at the begin and at the end). 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>
2008-01-29[CCID2]: Replace pipe assignment-function with assignmentGerrit Renker2-11/+8
The function ccid2_change_pipe only does an assignment. This patch simplifies the code by replacing the function with the assignment it performs. Furthermore, the type of pipe is promoted from `signed' to unsigned (increasing the range). As a result, a BUG_ON test for negative values now becomes obsolete (for safety not removed, but replaced with a less annoying `DCCP_BUG'). 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>
2008-01-29[CCID2]: Replace cwnd assignment-function with assignmentGerrit Renker2-16/+8
The current function ccid2_change_cwnd in effect makes only an assignment, as the test whether cwnd has reached 0 is only required when cwnd is halved. This patch simplifies the code by replacing the function with the assignment it performs. Furthermore, since ssthresh derives from cwnd and appears in many assignments and comparisons, the type of ssthresh has also been changed to match that of cwnd. 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>