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* ip: sysctl documentation cleanupStephen Hemminger2008-07-10
| | | | | | | | | | | Reduced version of the spelling cleanup patch. Take out the confusing language in tcp_frto, and organize the undocumented values. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Acked-by: Randy Dunlap <rdunlap@xenotime.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* Documentation: clarify tcp_{r,w}mem sysctl docsJ. Bruce Fields2008-07-10
| | | | | | | Fix some of the defaults and attempt to clarify some language. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: David S. Miller <davem@davemloft.net>
* sctp: Add documentation for sctp sysctl variableVlad Yasevich2008-07-08
| | | | | | Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com> Acked-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* ipv4: fix sysctl documentation of time related valuesStephen Hemminger2008-07-01
| | | | | | | | | These sysctl values are time related and all use the same routine (proc_dointvec_jiffies) that internally converts from seconds to jiffies. The code is fine, the documentation is just wrong. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* s2io: fix documentation about intr_typeMichal Schmidt2008-06-27
| | | | | | | | | | | The documentation for intr_type module parameter of the s2io driver is not consistent with the code. The comments in drivers/net/s2io.c are OK, but Documentation/networking/s2io.txt is wrong. Pointed out by Andrew Hecox. Signed-off-by: Michal Schmidt <mschmidt@redhat.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* Fix various old email addresses for dwmw2David Woodhouse2008-06-06
| | | | | | | | | Although if people have questions about ARCnet, perhaps it's _better_ for them to be mailing dwmw2@cam.ac.uk about it... Signed-off-by: David Woodhouse <dwmw2@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* bridge: update URLAdrian Bunk2008-06-03
| | | | | | | This patch updates the URL of the bridge homepage. Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* phylib: Add support for board-level PHY fixupsAndy Fleming2008-04-25
| | | | | | | | | | | Sometimes the specific interaction between the platform and the PHY requires special handling. For instance, to change where the PHY's clock input is, or to add a delay to account for latency issues in the data path. We add a mechanism for registering a callback with the PHY Lib to be called on matching PHYs when they are brought up, or reset. Signed-off-by: Andy Fleming <afleming@freescale.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* Merge branch 'master' of ↵David S. Miller2008-04-18
|\ | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6
| * [CAN]: Update documentation of struct sockaddr_canOliver Hartkopp2008-04-15
| | | | | | | | | | | | | | | | | | The struct sockaddr_can has been simplified in the code review process. This patch updates this simplification also in the associated documentation in can.txt . Signed-off-by: Oliver Hartkopp <oliver@hartkopp.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* | [WANPIPE]: Forgotten bits of Sangoma drivers removal.Adrian Bunk2008-04-15
| | | | | | | | | | | | | | | | Robert P. J. Day spotted that my removal of the Sangoma drivers missed a few bits. Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* | Merge branch 'master' of ↵David S. Miller2008-04-03
|\| | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 Conflicts: drivers/net/s2io.c
| * [NET]: Remove Documentation/networking/sk98lin.txtAdrian Bunk2008-03-31
| | | | | | | | | | | | | | | | Since the driver is gone there's no point in keeping the documentation. Signed-off-by: Adrian Bunk <bunk@kernel.org> Acked-by: Stephen Hemminger <shemminger@linux-foundation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* | the scheduled bcm43xx removalAdrian Bunk2008-03-13
|/ | | | | | | | Signed-off-by: Adrian Bunk <bunk@kernel.org> Cc: <Larry.Finger@lwfinger.net> Cc: <stefano.brivio@polimi.it> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* Documentation: fix tcp.txtMatti Linnanvuori2008-02-18
| | | | | | | Replace BIC with CUBIC as default congestion control. Fix grammar. Signed-off-by: Matti Linnanvuori <mattilinnanvuori@yahoo.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* Documentation: "decnet=" should read "decnet.addr=".Robert P. J. Day2008-02-03
| | | | | Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca> Signed-off-by: Adrian Bunk <bunk@kernel.org>
* [XFRM]: Fix statistics.Masahide NAKAMURA2008-01-31
| | | | | | | | | | | | | | o Outbound sequence number overflow error status is counted as XfrmOutStateSeqError. o Additionaly, it changes inbound sequence number replay error name from XfrmInSeqOutOfWindow to XfrmInStateSeqError to apply name scheme above. o Inbound IPv4 UDP encapsuling type mismatch error is wrongly mapped to XfrmInStateInvalid then this patch fiex the error to XfrmInStateMismatch. Signed-off-by: Masahide NAKAMURA <nakam@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [BONDING]: Documentation updateJay Vosburgh2008-01-28
| | | | | | | | | | | | | Update the bonding documentation: more discussion on initialization and configuration, changes to discussion of packet reordering in balance-rr, update some out of date information. Based in part on input from Rick Jones <rick.jones2@hp.com> and Andy Gospodarek <andy@greyhouse.net>. Signed-off-by: Jay Vosburgh <fubar@us.ibm.com> Acked-by: Andy Gospodarek <andy@greyhouse.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* [SHAPER]: The scheduled shaper removal.Adrian Bunk2008-01-28
| | | | | | | | This patch contains the scheduled removal of the shaper driver. Signed-off-by: Adrian Bunk <bunk@kernel.org> Acked-by: Alan Cox <alan@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [UDP]: Add memory accounting.Hideo Aoki2008-01-28
| | | | | | Signed-off-by: Takahiro Yasui <tyasui@redhat.com> Signed-off-by: Hideo Aoki <haoki@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [XFRM] Documentaion: Fix error example at XFRMOUTSTATEMODEERROR.Masahide NAKAMURA2008-01-28
| | | | | Signed-off-by: Masahide NAKAMURA <nakam@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [XFRM]: Define packet dropping statistics.Masahide NAKAMURA2008-01-28
| | | | | | | | | | | | This statistics is shown factor dropped by transformation at /proc/net/xfrm_stat for developer. It is a counter designed from current transformation source code and defined as linux private MIB. See Documentation/networking/xfrm_proc.txt for the detail. Signed-off-by: Masahide NAKAMURA <nakam@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [DCCP]: Support for server holding timewait stateGerrit Renker2008-01-28
| | | | | | | | | | | | | | | | This adds a socket option and signalling support for the case where the server holds timewait state on closing the connection, as described in RFC 4340, 8.3. Since holding timewait state at the server is the non-usual case, it is enabled via a socket option. Documentation for this socket option has been added. The setsockopt statement has been made resilient against different possible cases of expressing boolean `true' values using a suggestion by Ian McDonald. 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>
* [UDP]: Defer InDataGrams increment until recvmsg() does checksumWang Chen2008-01-28
| | | | | | | | | | | | | Thanks dave, herbert, gerrit, andi and other people for your discussion about this problem. UdpInDatagrams can be confusing because it counts packets that might be dropped later. Move UdpInDatagrams into recvmsg() as allowed by the RFC. Signed-off-by: Wang Chen <wangchen@cn.fujitsu.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
* [DCCP]: Update documentation on ioctlsGerrit Renker2008-01-28
| | | | | | | 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]: Promote CCID2 as default CCIDGerrit Renker2008-01-28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch addresses the following problems: 1. DCCP relies for its proper functioning on having at least one CCID module enabled (as in TCP plugable congestion control). Currently it is possible to disable both CCIDs and thus leave the DCCP module in a compiled, but entirely non-functional state: no sockets can be created when no CCID is available. Furthermore, the protocol is (again like TCP) not intended to be used without CCIDs. Last, a non-empty CCID list is needed for doing CCID feature negotiation. 2. Internally the default CCID that is advertised by the Linux host is set to CCID2 (DCCPF_INITIAL_CCID in include/linux/dccp.h). Disabling CCID2 in the Kconfig menu without changing the defaults leads to a failure `module not found' when trying to load the dccp module (which internally tries to load the default CCID). 3. The specification (RFC 4340, sec. 10) treats CCID2 somewhat like a `minimum common denominator'; the specification says that: * "New connections start with CCID 2 for both endpoints" * "A DCCP implementation intended for general use, such as an implementation in a general-purpose operating system kernel, SHOULD implement at least CCID 2. The intent is to make CCID 2 broadly available for interoperability [...]" Providing CCID2 as minimum-required CCID (like Reno/Cubic in TCP) thus seems reasonable. Hence this patch automatically selects CCID2 when DCCP is enabled. Documentation also added. Discussions with Ian McDonald on this subject are gratefully acknowledged. 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]: Update documentationGerrit Renker2008-01-28
| | | | | | | | | | This updates the DCCP documentation, following input from Ian McDonald, clarifiying the status of DCCP, and adding a note about the test tree. 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]: Honour and make use of shutdown option set by userGerrit Renker2008-01-28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This extends the DCCP socket API by honouring any shutdown(2) option set by the user. The behaviour is, as much as possible, made consistent with the API for TCP's shutdown. This patch exploits the information provided by the user via the socket API to reduce processing costs: * if the read end is closed (SHUT_RD), it is not necessary to deliver to input CCID; * if the write end is closed (SHUT_WR), the same idea applies, but with a difference - as long as the TX queue has not been drained, we need to receive feedback to keep congestion-control rates up to date. Hence SHUT_WR is honoured only after the last packet (under congestion control) has been sent; * although SHUT_RDWR seems nonsensical, it is nevertheless supported in the same manner as for TCP (and agrees with test for SHUTDOWN_MASK in dccp_poll() in net/dccp/proto.c). Furthermore, most of the code already honours the sk_shutdown flags (dccp_recvmsg() for instance sets the read length to 0 if SHUT_RD had been called); CCID handling is now added to this by the present patch. There will also no longer be any delivery when the socket is in the final stages, i.e. when one of dccp_close(), dccp_fin(), or dccp_done() has been called - which is fine since at that stage the connection is its final stages. Motivation and background are on http://www.erg.abdn.ac.uk/users/gerrit/dccp/notes/shutdown A FIXME has been added to notify the other end if SHUT_RD has been set (RFC 4340, 11.7). Note: There is a comment in inet_shutdown() in net/ipv4/af_inet.c which asks to "make sure the socket is a TCP socket". This should probably be extended to mean `TCP or DCCP socket' (the code is also used by UDP and raw sockets). 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>
* [CAN]: Add documentationOliver Hartkopp2008-01-28
| | | | | | | | This patch adds documentation for the PF_CAN protocol family. Signed-off-by: Oliver Hartkopp <oliver.hartkopp@volkswagen.de> Signed-off-by: Urs Thuermann <urs.thuermann@volkswagen.de> Signed-off-by: David S. Miller <davem@davemloft.net>
* Fix file references in documentation and KconfigJohann Felix Soden2008-01-22
| | | | | | | | | | | | | | Fix typo in arch/powerpc/boot/flatdevtree_env.h. There is no Documentation/networking/ixgbe.txt. README.cycladesZ is now in Documentation/. wavelan.p.h is now in drivers/net/wireless/. HFS.txt is now Documentation/filesystems/hfs.txt. OSS-files are now in sound/oss/. Signed-off-by: Johann Felix Soden <johfel@users.sourceforge.net> Acked-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Documentation: add a guideline for hard_start_xmit methodMatti Linnanvuori2008-01-18
| | | | | | | Add a guideline not to modify SKBs. Signed-off-by: Matti Linnanvuori <mattilinnanvuori@yahoo.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* bonding: Add new layer2+3 hash for xor/802.3ad modesJay Vosburgh2007-12-07
| | | | | | | | | | | | | | | | | | | | | | | Add new hash for balance-xor and 802.3ad modes. Originally submitted by "Glenn Griffin" <ggriffin.kernel@gmail.com>; modified by Jay Vosburgh to move setting of hash policy out of line, tweak the documentation update and add version update to 3.2.2. Glenn's original comment follows: Included is a patch for a new xmit_hash_policy for the bonding driver that selects slaves based on MAC and IP information. This is a middle ground between what currently exists in the layer2 only policy and the layer3+4 policy. This policy strives to be fully 802.3ad compliant by transmitting every packet of any particular flow over the same link. As documented the layer3+4 policy is not fully compliant for extreme cases such as ip fragmentation, so this policy is a nice compromise for environments that require full compliance but desire more than the layer2 only policy. Signed-off-by: "Glenn Griffin" <ggriffin.kernel@gmail.com> Signed-off-by: Jay Vosburgh <fubar@us.ibm.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* [NET]: Remove references to net-modules.txt.Adrian Bunk2007-11-13
| | | | | | | | | When I removed net-modules.txt because it only contained ancient information I missed that many Kconfig entries pointed to this ancient information. Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [NET]: Remove Documentation/networking/pt.txtAdrian Bunk2007-11-07
| | | | | | | | | There's no no point in keeping documentation for a driver that was removed many years ago. Signed-off-by: Adrian Bunk <bunk@kernel.org> Acked-by: Alan Cox <alan@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [NET]: Remove Documentation/networking/routing.txtAdrian Bunk2007-11-07
| | | | | | | This file is so outdated that I can't see any value in keeping it. Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [NET]: Remove Documentation/networking/ncsa-telnetAdrian Bunk2007-11-07
| | | | | | | | | Newsflash: There once was a version of NCSA telnet that had some bug. Spotted by Pekka Pietikainen. Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [NET]: Remove comx driver docs.Adrian Bunk2007-11-07
| | | | | | | | The drivers have already been removed 3.5 years ago. Signed-off-by: Adrian Bunk <bunk@kernel.org> Acked-by: Alan Cox <alan@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [NET]: Remove Documentation/networking/ConfigurableAdrian Bunk2007-11-07
| | | | | | | | After more than 11 years this file does no longer contain much useful information. Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [NET]: Document some simple rules for actionsJamal Hadi Salim2007-10-26
| | | | | | | | | | This patch adds documentation on what is expected of an action which branches away from the action-graph or when it needs to trample on actins. It also describes what is expected of users of such actions. Signed-off-by: Jamal Hadi Salim <hadi@cyberus.ca> Signed-off-by: David S. Miller <davem@davemloft.net>
* [TCP]: Fix inconsistency of terms.Ryousei Takano2007-10-26
| | | | | | | | | Fix inconsistency of terms: 1) D-SACK 2) F-RTO Signed-off-by: Ryousei Takano <takano-ryousei@aist.go.jp> Signed-off-by: David S. Miller <davem@davemloft.net>
* remove Documentation/networking/net-modules.txtAdrian Bunk2007-10-25
| | | | | | | | | | | | According to git, the only one who touched this file during the last 5 years was me when removing drivers... modinfo offers less ancient information. Signed-off-by: Adrian Bunk <bunk@kernel.org> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Paul Gortmaker <paul.gortmaker@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* typo fixesMatt LaPlante2007-10-19
| | | | | | | | | | | | Most of these fixes were already submitted for old kernel versions, and were approved, but for some reason they never made it into the releases. Because this is a consolidation of a couple old missed patches, it touches both Kconfigs and documentation texts. Signed-off-by: Matt LaPlante <kernel1@cyberdogtech.com> Acked-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Adrian Bunk <bunk@kernel.org>
* spelling fixes: Documentation/Simon Arlott2007-10-19
| | | | | | | Spelling fixes in Documentation/. Signed-off-by: Simon Arlott <simon@fire.lp0.eu> Signed-off-by: Adrian Bunk <bunk@kernel.org>
* KEYS: Make request_key() and co fundamentally asynchronousDavid Howells2007-10-17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Make request_key() and co fundamentally asynchronous to make it easier for NFS to make use of them. There are now accessor functions that do asynchronous constructions, a wait function to wait for construction to complete, and a completion function for the key type to indicate completion of construction. Note that the construction queue is now gone. Instead, keys under construction are linked in to the appropriate keyring in advance, and that anyone encountering one must wait for it to be complete before they can use it. This is done automatically for userspace. The following auxiliary changes are also made: (1) Key type implementation stuff is split from linux/key.h into linux/key-type.h. (2) AF_RXRPC provides a way to allocate null rxrpc-type keys so that AFS does not need to call key_instantiate_and_link() directly. (3) Adjust the debugging macros so that they're -Wformat checked even if they are disabled, and make it so they can be enabled simply by defining __KDEBUG to be consistent with other code of mine. (3) Documentation. [alan@lxorguk.ukuu.org.uk: keys: missing word in documentation] Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge branch 'master' of ↵Linus Torvalds2007-10-15
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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: (42 commits) [IPV6]: Consolidate the ip6_pol_route_(input|output) pair [TCP]: Make snd_cwnd_cnt 32-bit [TCP]: Update the /proc/net/tcp documentation [NETNS]: Don't panic on creating the namespace's loopback [NEIGH]: Ensure that pneigh_lookup is protected with RTNL [INET]: kmalloc+memset -> kzalloc in frag_alloc_queue [ISDN]: Fix compile with CONFIG_ISDN_X25 disabled. [IPV6]: Replace sk_buff ** with sk_buff * in input handlers [SELINUX]: Update for netfilter ->hook() arg changes. [INET]: Consolidate the xxx_put [INET]: Small cleanup for xxx_put after evictor consolidation [INET]: Consolidate the xxx_evictor [INET]: Consolidate the xxx_frag_destroy [INET]: Consolidate xxx_the secret_rebuild [INET]: Consolidate the xxx_frag_kill [INET]: Collect common frag sysctl variables together [INET]: Collect frag queues management objects together [INET]: Move common fields from frag_queues in one place. [TG3]: Fix performance regression on 5705. [ISDN]: Remove local copy of device name to make sure renames work. ...
| * [TCP]: Update the /proc/net/tcp documentationJean Delvare2007-10-15
| | | | | | | | | | | | | | | | * Say that this interface is deprecated. * Update function name references to match the current code. Signed-off-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net/bonding: Optionally allow ethernet slaves to keep own MACJay Vosburgh2007-10-15
|/ | | | | | | | | | | | | | | | | Update the "don't change MAC of slaves" functionality added in previous changes to be a generic option, rather than something tied to IB devices, as it's occasionally useful for regular ethernet devices as well. Adds "fail_over_mac" option (which is automatically enabled for IB slaves), applicable only to active-backup mode. Includes documentation update. Updates bonding driver version to 3.2.0. Signed-off-by: Jay Vosburgh <fubar@us.ibm.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* [DCCP]: Correct documentationGerrit Renker2007-10-10
| | | | | | | | | This corrects erroneous documentation of the socket API. 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]: Update API documentationGerrit Renker2007-10-10
| | | | | | | | | | This adds documentation on the use of service codes on client and server. 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]: Add socket option to query the current MPSGerrit Renker2007-10-10
| | | | | | | | | | | | | | | | | | | | | | | This enables applications to query the current value of the Maximum Packet Size via a socket option, suggested as a SHOULD in (RFC 4340, p. 102). This socket option is useful to avoid the annoying bail-out via `-EMSGSIZE'. In particular, as fragmentation is not currently supported (and its use is partly discouraged in RFC 4340). With this option, it is possible to size buffers accordingly, e.g. int buflen = dccp_get_cur_mps(sockfd); /* or */ if (msgsize > dccp_get_cur_mps(sockfd)) die("message is too large for this path"); 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>
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