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* pppoe.c: Fix kernel panic caused by __pppoe_xmitAndrej Ota2010-12-131-1/+1
| | | | | | | | | | | | | | | | | | | | | __pppoe_xmit function return value was invalid resulting in additional call to kfree_skb on already freed skb. This resulted in memory corruption and consequent kernel panic after PPPoE peer terminated the link. This fixes commit 55c95e738da85373965cb03b4f975d0fd559865b. Reported-by: Gorik Van Steenberge <gvs@zemos.net> Reported-by: Daniel Kenzelmann <kernel.bugzilla@kenzelmann.dyndns.info> Reported-by: Denys Fedoryshchenko <nuclearcat@nuclearcat.com> Reported-by: Pawel Staszewski <pstaszewski@artcom.pl> Diagnosed-by: Andrej Ota <andrej@ota.si> Diagnosed-by: Eric Dumazet <eric.dumazet@gmail.com> Tested-by: Denys Fedoryshchenko <nuclearcat@nuclearcat.com> Tested-by: Pawel Staszewski <pstaszewski@artcom.pl> Signed-off-by: Jarek Poplawski <jarkao2@gmail.com> Signed-off-by: Andrej Ota <andrej@ota.si> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: constify some ppp/pptp structsEric Dumazet2010-09-221-1/+1
| | | | | Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* ppp: make channel_ops conststephen hemminger2010-08-051-2/+2
| | | | | | | | The PPP channel ops structure should be const. Cleanup the declarations to use standard C99 format. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* cleanup: remove pppoe_xmit() declaration.Rami Rosen2010-06-101-1/+0
| | | | | | | | There is no need for pppoe_xmit() forward declaration in drivers/net/pppoe.c. This patch removes this pppoe_xmit() declaration. Signed-off-by: Rami Rosen <ramirose@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* fix return value of __pppoe_xmit() method.Rami Rosen2010-06-051-1/+1
| | | | | | | | | | | | Hi, __pppoe_xmit() in drivers/net/pppoe always returns 1. When the methods fails (via goto abort), it should return 0 and not 1. Regards, Rami Rosen Signed-off-by: Rami Rosen <ramirose@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* pppoe: uninitialized variable in pppoe_flush_dev()Dan Carpenter2010-05-241-0/+1
| | | | | | | | | This assignment got deleted along with the checks by mistake. This comes from: 8753d29fd "pppoe: remove unnecessary checks in pppoe_flush_dev" Signed-off-by: Dan Carpenter <error27@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* cleanup: remove pppoe_ioctl() declaration.Rami Rosen2010-05-181-1/+0
| | | | | | | | | | | | Hi, - This patch removes pppoe_ioctl() declaration in drivers/net/pppoe.c as it is unneeded. Regards, Rami Rosen Signed-off-by: Rami Rosen <ramirose@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* drivers/net: remove useless semicolonsJoe Perches2010-05-181-1/+1
| | | | | | | | | switch and while statements don't need semicolons at end of statement [ Fixup minor conflicts with recent wimax merge... -DaveM ] Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* pppoe: remove unnecessary checks in pppoe_flush_devJiri Pirko2010-05-051-6/+0
| | | | | | | pernet memory is guaranteed to exist when notifiers are called. Signed-off-by: Jiri Pirko <jpirko@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* pppoe: use pppoe_pernet instead of directly net_genericJiri Pirko2010-04-261-1/+1
| | | | | Signed-off-by: Jiri Pirko <jpirko@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* drivers/net: Move && and || to end of previous lineJoe Perches2009-12-031-2/+2
| | | | | | | | | | | | | | Only files where David Miller is the primary git-signer. wireless, wimax, ixgbe, etc are not modified. Compile tested x86 allyesconfig only Not all files compiled (not x86 compatible) Added a few > 80 column lines, which I ignored. Existing checkpatch complaints ignored. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: Simplify pppoe pernet operations.Eric W. Biederman2009-12-021-30/+8
| | | | | | | | Take advantage of the new pernet automatic storage management, and stop using compatibility network namespace functions. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* netns: net_identifiers should be read_mostlyEric Dumazet2009-11-181-1/+1
| | | | | Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* pppoe: RCU locking in get_item_by_addr()Eric Dumazet2009-11-021-10/+9
| | | | | | | | Use dev_get_by_name_rcu() instead of dev_get_by_name(), to avoid touching device refcount in hotpath. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* PPPoE: Fix flush/close races.Michal Ostrowski2009-10-271-61/+68
| | | | | | | | | | | | | | | | | | | | | | | Be more careful about the state of pointers during tear-down. The "pppoe_dev" field can only be looked at safely while holding socket locks. This subsequently allows for the flush_lock to be killed. We depend on the PPPOX_CONNECTED state to tell us that that those fields are valid, so whoever clears that state (pppox_unbind_sock()) is responsible for the dev_put() call. We also have to ensure that we delete_item() on all sockets before they are cleaned up. The need for these changes has been exposed by scenarios wherein namespace bindings of ethernet devices change while there are ongoing PPPoE sessions, which resulted in oopses due to unusual socket connection termination paths, exposing these issues. Signed-off-by: Michal Ostrowski <mostrows@gmail.com> Reviewed-by: Cyril Gorcunov <gorcunov@gmail.com> Reported-by: Denys Fedoryschenko <denys@visp.net.lb> Tested-by: Denys Fedoryschenko <denys@visp.net.lb>
* net,pppoe: fixup module init/exit subsequent callsCyrill Gorcunov2009-08-131-11/+11
| | | | | | | | | pernet data should allocated first and freed last on module init/exit routines otherwise it's possible to have unserialized calls to packet handling routines. Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* pppoe: fix /proc/net/pppoeEric Dumazet2009-07-301-0/+1
| | | | | | | | | If a socket is hashed in last slot of pppoe hash table (PPPOE_HASH_SIZE-1) we report it many times (up to filling seq buffer) (Only the last socket of last slot) Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: convert usage of packet_type to read_mostlyStephen Hemminger2009-03-101-3/+3
| | | | | | | | Protocols that use packet_type can be __read_mostly section for better locality. Elminate any unnecessary initializations of NULL. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* drivers/net/ppp*.c: fix sparse warnings: fix signednessHannes Eder2009-02-181-1/+1
| | | | | | | | | | | Fix this sparse warnings: drivers/net/ppp_generic.c:919:43: warning: incorrect type in argument 1 (different signedness) drivers/net/pppoe.c:1195:43: warning: incorrect type in argument 1 (different signedness) drivers/net/pppol2tp.c:2666:43: warning: incorrect type in argument 1 (different signedness) Signed-off-by: Hannes Eder <hannes@hanneseder.net> Acked-by: Cyrill Gorcunov <gorcunov@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* ppp: section fixes re netnsAlexey Dobriyan2009-02-101-1/+1
| | | | | | | PPP is modular code so no initdata on netns hooks. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: replace uses of __constant_{endian}Harvey Harrison2009-02-011-4/+4
| | | | | | | Base versions handle constant folding now. Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: pppoe - stop using proc internalsCyrill Gorcunov2009-01-271-28/+6
| | | | | | | | Alexey Dobriyan pointed that using PDE_NET outside the proc code is plain bogus (thanks Alexey!). Fix it. Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: pppoe - get rid of DECLARE_MAC_BUFCyrill Gorcunov2009-01-221-1/+0
| | | | | | | | | While was playing with PPP namespaces I occasionally brought back DECLARE_MAC_BUF which is not needed (we have %pM here). Fix it. Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: pppoe,pppol2tp - register channels with explicit netCyrill Gorcunov2009-01-221-1/+1
| | | | | | | | | In PPPo[E|L2TP] we could explicitly point which net namespace we're going to use for channels - make it so. Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org> Signed-off-by: James Chapman <jchapman@katalix.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: pppoe - introduce net-namespace functionalityCyrill Gorcunov2009-01-221-133/+244
| | | | | | | | | | | | | | | | - each net-namespace for pppoe module is having own hash table and appropriate locks wich are allocated at time of namespace intialization. It requires about 140 bytes of memory for every new namespace but such approach allow us to escape from hash chains growing and additional lock contends (especially in SMP environment). - pppox code allows to create per-namespace sockets for PX_PROTO_OE protocol only (since at this moment support for pppol2tp net-namespace is not implemented yet). Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: pppoe - code cleanup and helpersCyrill Gorcunov2009-01-221-81/+86
| | | | | | | | | | - Introduce PPPOE_HASH_MASK. - Remove redundant declaration of pppoe_chan_ops. - Introduce stage_session helper. - Tabs, space, long-line-split cleanup. Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: constify VFTsJan Engelhardt2009-01-211-1/+1
| | | | | Signed-off-by: Jan Engelhardt <jengelh@medozas.de> Signed-off-by: David S. Miller <davem@davemloft.net>
* Merge branch 'master' of ↵David S. Miller2008-10-311-3/+3
|\ | | | | | | | | | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 Conflicts: drivers/net/wireless/p54/p54common.c
| * pppoe: Fix socket leak.David S. Miller2008-10-311-3/+3
| | | | | | | | | | | | | | | | | | | | Move SKB trim before we lookup the socket so we don't have to put it on failure. Based upon an initial patch by Jarek Poplawski and suggestions from Herbert Xu. Signed-off-by: David S. Miller <davem@davemloft.net>
* | net: convert print_mac to %pMJohannes Berg2008-10-281-3/+2
|/ | | | | | | | | | | | This converts pretty much everything to print_mac. There were a few things that had conflicts which I have just dropped for now, no harm done. I've built an allyesconfig with this and looked at the files that weren't built very carefully, but it's a huge patch. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* pppoe: warning fixStephen Hemminger2008-06-211-1/+1
| | | | | | | | | | Fix warning: drivers/net/pppoe.c: In function 'pppoe_recvmsg': drivers/net/pppoe.c:945: warning: comparison of distinct pointer types lacks a cast because skb->len is unsigned int and total_len is size_t Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* pppoe: Unshare skb before anything elseHerbert Xu2008-06-101-3/+3
| | | | | | | | We need to unshare the skb first as otherwise pskb_may_pull may write to a shared skb which could be bad. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
* net pppoe: Check packet length on all receive pathsHerbert Xu2008-06-101-14/+17
| | | | | | | | | | | | | | | The length field in the PPPOE header wasn't checked completely. This patch causes all packets shorter than the declared length to be dropped. It also changes the memcpy_toiovec call to skb_copy_datagram_iovec so that paged packets (rare for PPPOE) are handled properly. Thanks to Ilja of the Netric Security Team for discovering and reporting this bug, and Chris Wright for the total_len check. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
* netdev: use non-racy method for proc entries creationDenis V. Lunev2008-04-291-3/+1
| | | | | | | | | | | | Use proc_create()/proc_create_data() to make sure that ->proc_fops and ->data be setup before gluing PDE to main tree. Signed-off-by: Denis V. Lunev <den@openvz.org> Cc: Jeff Garzik <jgarzik@pobox.com> Cc: Alexey Dobriyan <adobriyan@gmail.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* [NET] NETNS: Omit net_device->nd_net without CONFIG_NET_NS.YOSHIFUJI Hideaki2008-03-251-3/+3
| | | | | | | | Introduce per-net_device inlines: dev_net(), dev_net_set(). Without CONFIG_NET_NS, no namespace other than &init_net exists. Let's explicitly define them to help compiler optimizations. Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
* [PPP]: Sparse warning fixes.Stephen Hemminger2008-01-291-0/+2
| | | | | | | | | Fix a bunch of warnings in PPP and related drivers. Mostly because sparse doesn't like it when the the function is only marked private in the forward declaration. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [NET]: Forget the zero_it argument of sk_alloc()Pavel Emelyanov2007-11-011-1/+1
| | | | | | | | | | | | | | | Finally, the zero_it argument can be completely removed from the callers and from the function prototype. Besides, fix the checkpatch.pl warnings about using the assignments inside if-s. This patch is rather big, and it is a part of the previous one. I splitted it wishing to make the patches more readable. Hope this particular split helped. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [NET]: Wrap netdevice hardware header creation.Stephen Hemminger2007-10-111-4/+4
| | | | | | | | | | Add inline for common usage of hardware header creation, and fix bug in IPV6 mcast where the assumption about negative return is an errno. Negative return from hard_header means not enough space was available,(ie -N bytes). Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* pppoe: endiannessAl Viro2007-10-111-9/+9
| | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* [NET]: Introduce and use print_mac() and DECLARE_MAC_BUF()Joe Perches2007-10-111-5/+3
| | | | | | | This is nicer than the MAC_FMT stuff. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [NET]: Make the device list and device lookups per namespace.Eric W. Biederman2007-10-111-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch makes most of the generic device layer network namespace safe. This patch makes dev_base_head a network namespace variable, and then it picks up a few associated variables. The functions: dev_getbyhwaddr dev_getfirsthwbytype dev_get_by_flags dev_get_by_name __dev_get_by_name dev_get_by_index __dev_get_by_index dev_ioctl dev_ethtool dev_load wireless_process_ioctl were modified to take a network namespace argument, and deal with it. vlan_ioctl_set and brioctl_set were modified so their hooks will receive a network namespace argument. So basically anthing in the core of the network stack that was affected to by the change of dev_base was modified to handle multiple network namespaces. The rest of the network stack was simply modified to explicitly use &init_net the initial network namespace. This can be fixed when those components of the network stack are modified to handle multiple network namespaces. For now the ifindex generator is left global. Fundametally ifindex numbers are per namespace, or else we will have corner case problems with migration when we get that far. At the same time there are assumptions in the network stack that the ifindex of a network device won't change. Making the ifindex number global seems a good compromise until the network stack can cope with ifindex changes when you change namespaces, and the like. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [NET]: Make device event notification network namespace safeEric W. Biederman2007-10-111-0/+3
| | | | | | | | | | | | | | | | | | Every user of the network device notifiers is either a protocol stack or a pseudo device. If a protocol stack that does not have support for multiple network namespaces receives an event for a device that is not in the initial network namespace it quite possibly can get confused and do the wrong thing. To avoid problems until all of the protocol stacks are converted this patch modifies all netdev event handlers to ignore events on devices that are not in the initial network namespace. As the rest of the code is made network namespace aware these checks can be removed. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [NET]: Make packet reception network namespace safeEric W. Biederman2007-10-111-0/+6
| | | | | | | | | | | | | | This patch modifies every packet receive function registered with dev_add_pack() to drop packets if they are not from the initial network namespace. This should ensure that the various network stacks do not receive packets in a anything but the initial network namespace until the code has been converted and is ready for them. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [NET]: Make socket creation namespace safe.Eric W. Biederman2007-10-111-2/+2
| | | | | | | | | | | | | | | | | | | | | | | This patch passes in the namespace a new socket should be created in and has the socket code do the appropriate reference counting. By virtue of this all socket create methods are touched. In addition the socket create methods are modified so that they will fail if you attempt to create a socket in a non-default network namespace. Failing if we attempt to create a socket outside of the default network namespace ensures that as we incrementally make the network stack network namespace aware we will not export functionality that someone has not audited and made certain is network namespace safe. Allowing us to partially enable network namespaces before all of the exotic protocols are supported. Any protocol layers I have missed will fail to compile because I now pass an extra parameter into the socket creation code. [ Integrated AF_IUCV build fixes from Andrew Morton... -DaveM ] Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [NET]: Make /proc/net per network namespaceEric W. Biederman2007-10-111-2/+3
| | | | | | | | | | | | | | | | | | This patch makes /proc/net per network namespace. It modifies the global variables proc_net and proc_net_stat to be per network namespace. The proc_net file helpers are modified to take a network namespace argument, and all of their callers are fixed to pass &init_net for that argument. This ensures that all of the /proc/net files are only visible and usable in the initial network namespace until the code behind them has been updated to be handle multiple network namespaces. Making /proc/net per namespace is necessary as at least some files in /proc/net depend upon the set of network devices which is per network namespace, and even more files in /proc/net have contents that are relevant to a single network namespace. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [PPP] pppoe: Fix double-free on skb after transmit failureHerbert Xu2007-09-201-2/+1
| | | | | | | | | When I got rid of the second packet in __pppoe_xmit I created a double-free on the skb because of the goto abort on failure. This patch removes that. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
* [NET] skbuff: Add skb_cow_headHerbert Xu2007-09-171-1/+1
| | | | | | | | | | | This patch adds an optimised version of skb_cow that avoids the copy if the header can be modified even if the rest of the payload is cloned. This can be used in encapsulating paths where we only need to modify the header. As it is, this can be used in PPPOE and bridging. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
* [PPP] pppoe: Fill in header directly in __pppoe_xmitHerbert Xu2007-09-171-11/+9
| | | | | | | | | | | This patch removes the hdr variable (which is copied into the skb) and instead sets the header directly in the skb. It also uses __skb_push instead of skb_push since we've just checked using skb_cow for enough head room. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
* [PPP] pppoe: Fix data clobbering in __pppoe_xmit and return valueHerbert Xu2007-09-171-37/+13
| | | | | | | | | | | | | | | | The function __pppoe_xmit modifies the skb data and therefore it needs to copy and skb data if it's cloned. In fact, it currently allocates a new skb so that it can return 0 in case of error without freeing the original skb. This is totally wrong because returning zero is meant to indicate congestion whereupon pppoe is supposed to wake up the upper layer once the congestion subsides. This makes sense for ppp_async and ppp_sync but is out-of-place for pppoe. This patch makes it always return 1 and free the skb. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
* [PPP] pppoe: Fix skb_unshare_check call positionHerbert Xu2007-09-171-3/+3
| | | | | | | | The skb_unshare_check call needs to be made before pskb_may_pull, not after. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
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