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2008-01-28[NEIGH]: Use the ctl paths to create neighbours sysctlsPavel Emelyanov
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>
2008-01-28[NEIGH]: Cleanup the neigh_sysctl_registerPavel Emelyanov
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>
2008-01-28[NET]: Move netfilter checksum helpers to net/core/utils.cPatrick McHardy
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>
2008-01-28[NET]: Nicer WARN_ON in netstat_showPavel Emelyanov
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>
2008-01-28[NET]: Make macro to specify the ptype_base sizePavel Emelyanov
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>
2008-01-28[NET]: Name magic constants in sock_wake_async()Pavel Emelyanov
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>
2008-01-28[NET] proto: Use pcounters for the inuse fieldArnaldo Carvalho de Melo
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28[NET]: Compact sk_stream_mem_schedule() codePavel Emelyanov
This function references sk->sk_prot->xxx for many times. It turned out, that there's so many code in it, that gcc cannot always optimize access to sk->sk_prot's fields. After saving the sk->sk_prot on the stack and comparing disassembled code, it turned out that the function became ~10 bytes shorter and made less dereferences (on i386 and x86_64). Stack consumption didn't grow. Besides, this patch drives most of this function into the 80 columns limit. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28[NET]: Make netns cleanup to run in a separate queueBenjamin Thery
This patch adds a separate workqueue for cleaning up a network namespace. If we use the keventd workqueue to execute cleanup_net(), there is a problem to unregister devices in IPv6. Indeed the code that cleans up also schedule work in keventd: as long as cleanup_net() hasn't return, dst_gc_task() cannot run and as long as dst_gc_task() has not run, there are still some references pending on the net devices and cleanup_net() can not unregister and exit the keventd workqueue. Signed-off-by: Benjamin Thery <benjamin.thery@bull.net> Signed-off-by: Daniel Lezcano <dlezcano@fr.ibm.com> Acked-by: Denis V. Lunev <den@openvz.org> Acked-By: Kirill Korotaev <dev@sw.ru> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28[NET] net/core/request_sock.c: Remove unused exports.Adrian Bunk
This patch removes the following unused EXPORT_SYMBOL's: - reqsk_queue_alloc - __reqsk_queue_destroy - reqsk_queue_destroy Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28[NET]: Consolidate net namespace related proc files creation.Denis V. Lunev
Signed-off-by: Denis V. Lunev <den@openvz.org> Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28[NET]: Make the netlink methods in rtnetlink handle multiple network namespacesEric W. Biederman
After the previous prep work this just consists of removing checks limiting the code to work in the initial network namespace, and updating rtmsg_ifinfo so we can generate events for devices in something other then the initial network namespace. Referring to network other network devices like the IFLA_LINK and IFLA_MASTER attributes do, gets interesting if those network devices happen to be in other network namespaces. Currently ifindex numbers are allocated globally so I have taken the path of least resistance and not still report the information even though the devices they are talking about are invisible. If applications start getting confused or when ifindex numbers become local to the network namespace we may need to do something different in the future. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: Denis V. Lunev <den@openz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28[NET]: Make rtnetlink infrastructure network namespace aware (v3)Denis V. Lunev
After this patch none of the netlink callback support anything except the initial network namespace but the rtnetlink infrastructure now handles multiple network namespaces. Changes from v2: - IPv6 addrlabel processing Changes from v1: - no need for special rtnl_unlock handling - fixed IPv6 ndisc Signed-off-by: Denis V. Lunev <den@openvz.org> Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28[NET]: Modify all rtnetlink methods to only work in the initial namespace (v2)Denis V. Lunev
Before I can enable rtnetlink to work in all network namespaces I need to be certain that something won't break. So this patch deliberately disables all of the rtnletlink methods in everything except the initial network namespace. After the methods have been audited this extra check can be disabled. Changes from v1: - added IPv6 addrlabel protection Signed-off-by: Denis V. Lunev <den@openvz.org> Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2008-01-28[NETPOLL]: Don't need rx_flags.Stephen Hemminger
The rx_flags variable is redundant. Turning rx on/off is done via setting the rx_np pointer. Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28[NETPOLL]: Kill NETPOLL_RX_DROP, set but never tested.Stephen Hemminger
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28[NETPOLL]: no need to store local_macStephen Hemminger
The local_mac is managed by the network device, no need to keep a spare copy and all the management problems that could cause. Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28[NETPOLL]: netpoll_poll() cleanupStephen Hemminger
Restructure code slightly to improve readability: * dereference device once * change obvious while() loop * let poll_napi() handle null list itself Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28[NETPOLL]: Use skb_queue_purge().Stephen Hemminger
Use standard routine for flushing queue. Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28[CAN]: Allocate protocol numbers for PF_CANOliver Hartkopp
This patch adds a protocol/address family number, ARP hardware type, ethernet packet type, and a line discipline number for the SocketCAN implementation. 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>
2008-01-28[NET]: Move sock_valbool_flag to socket.cPavel Emelyanov
The sock_valbool_flag() helper is used in setsockopt to set or reset some flag on the sock. This helper is required in the net/socket.c only, so move it there. Besides, patch two places in sys_setsockopt() that repeat this helper functionality manually. Since this is not a bugfix, but a trivial cleanup, I prepared this patch against net-2.6.25, but it also applies (with a single offset) to the latest net-2.6. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28[NET]: Eliminate duplicate copies of dst_discardHerbert Xu
We have a number of copies of dst_discard scattered around the place which all do the same thing, namely free a packet on the input or output paths. This patch deletes all of them except dst_discard and points all the users to it. The only non-trivial bit is decnet where it returns an error. However, conceptually this is identical to the blackhole functions used in IPv4 and IPv6 which do not return errors. So they should either all return errors or all return zero. For now I've stuck with the majority and picked zero as the return value. It doesn't really matter in practice since few if any driver would react differently depending on a zero return value or NET_RX_DROP. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28[NET]: Convert init_timer into setup_timerPavel Emelyanov
Many-many code in the kernel initialized the timer->function and timer->data together with calling init_timer(timer). There is already a helper for this. Use it for networking code. The patch is HUGE, but makes the code 130 lines shorter (98 insertions(+), 228 deletions(-)). Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28[IPV4]: Add raw drops counter.Wang Chen
Add raw drops counter for IPv4 in /proc/net/raw . Signed-off-by: Wang Chen <wangchen@cn.fujitsu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28[TCP]: Splice receive support.Jens Axboe
Support for network splice receive. Signed-off-by: Jens Axboe <jens.axboe@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-25cpu-hotplug: replace lock_cpu_hotplug() with get_online_cpus()Gautham R Shenoy
Replace all lock_cpu_hotplug/unlock_cpu_hotplug from the kernel and use get_online_cpus and put_online_cpus instead as it highlights the refcount semantics in these operations. The new API guarantees protection against the cpu-hotplug operation, but it doesn't guarantee serialized access to any of the local data structures. Hence the changes needs to be reviewed. In case of pseries_add_processor/pseries_remove_processor, use cpu_maps_update_begin()/cpu_maps_update_done() as we're modifying the cpu_present_map there. Signed-off-by: Gautham R Shenoy <ego@in.ibm.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-01-23[NETNS]: Re-export init_net via EXPORT_SYMBOL.Denis V. Lunev
init_net is used added as a parameter to a lot of old API calls, f.e. ip_dev_find. These calls were exported as EXPORT_SYMBOL. So, export init_net as EXPORT_SYMBOL to keep networking API consistent. Signed-off-by: Denis V. Lunev <den@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-20[NET]: rtnl_link: fix use-after-freePatrick McHardy
When unregistering the rtnl_link_ops, all existing devices using the ops are destroyed. With nested devices this may lead to a use-after-free despite the use of for_each_netdev_safe() in case the upper device is next in the device list and is destroyed by the NETDEV_UNREGISTER notifier. The easy fix is to restart scanning the device list after removing a device. Alternatively we could add new devices to the front of the list to avoid having dependant devices follow the device they depend on. A third option would be to only restart scanning if dev->iflink of the next device matches dev->ifindex of the current one. For now this seems like the safest solution. With this patch, the veth rtnl_link_ops unregistration can use rtnl_link_unregister() directly since it now also handles destruction of multiple devices at once. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-20[NEIGH]: Revert 'Fix race between neigh_parms_release and neightbl_fill_parms'David S. Miller
Commit 9cd40029423701c376391da59d2c6469672b4bed (Fix race between neigh_parms_release and neightbl_fill_parms) introduced device reference counting regressions for several people, see: http://bugzilla.kernel.org/show_bug.cgi?id=9778 for example. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-10[NEIGH]: Fix race between neigh_parms_release and neightbl_fill_parmsPavel Emelyanov
The neightbl_fill_parms() is called under the write-locked tbl->lock and accesses the parms->dev. The negh_parm_release() calls the dev_put(parms->dev) without this lock. This creates a tiny race window on which the parms contains potentially stale dev pointer. To fix this race it's enough to move the dev_put() upper under the tbl->lock, but note, that the parms are held by neighbors and thus can live after the neigh_parms_release() is called, so we still can have a parm with bad dev pointer. I didn't find where the neigh->parms->dev is accessed, but still think that putting the dev is to be done in a place, where the parms are really freed. Am I right with that? Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-08[NET]: Clone the sk_buff 'iif' field in __skb_clone()Paul Moore
Both NetLabel and SELinux (other LSMs may grow to use it as well) rely on the 'iif' field to determine the receiving network interface of inbound packets. Unfortunately, at present this field is not preserved across a skb clone operation which can lead to garbage values if the cloned skb is sent back through the network stack. This patch corrects this problem by properly copying the 'iif' field in __skb_clone() and removing the 'iif' field assignment from skb_act_clone() since it is no longer needed. Also, while we are here, put the assignments in the same order as the offsets to reduce cacheline bounces. Signed-off-by: Paul Moore <paul.moore@hp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-08[NET]: Stop polling when napi_disable() is pending.David S. Miller
This finally adds the code in net_rx_action() to break out of the ->poll()'ing loop when a napi_disable() is found to be pending. Now, even if a device is being flooded with packets it can be cleanly brought down. Signed-off-by: David S. Miller <davem@davemloft.net>
2007-12-20[NET]: Fix function put_cmsg() which may cause usr application memory overflowWei Yongjun
When used function put_cmsg() to copy kernel information to user application memory, if the memory length given by user application is not enough, by the bad length calculate of msg.msg_controllen, put_cmsg() function may cause the msg.msg_controllen to be a large value, such as 0xFFFFFFF0, so the following put_cmsg() can also write data to usr application memory even usr has no valid memory to store this. This may cause usr application memory overflow. int put_cmsg(struct msghdr * msg, int level, int type, int len, void *data) { struct cmsghdr __user *cm = (__force struct cmsghdr __user *)msg->msg_control; struct cmsghdr cmhdr; int cmlen = CMSG_LEN(len); ~~~~~~~~~~~~~~~~~~~~~ int err; if (MSG_CMSG_COMPAT & msg->msg_flags) return put_cmsg_compat(msg, level, type, len, data); if (cm==NULL || msg->msg_controllen < sizeof(*cm)) { msg->msg_flags |= MSG_CTRUNC; return 0; /* XXX: return error? check spec. */ } if (msg->msg_controllen < cmlen) { ~~~~~~~~~~~~~~~~~~~~~~~~ msg->msg_flags |= MSG_CTRUNC; cmlen = msg->msg_controllen; } cmhdr.cmsg_level = level; cmhdr.cmsg_type = type; cmhdr.cmsg_len = cmlen; err = -EFAULT; if (copy_to_user(cm, &cmhdr, sizeof cmhdr)) goto out; if (copy_to_user(CMSG_DATA(cm), data, cmlen - sizeof(struct cmsghdr))) goto out; cmlen = CMSG_SPACE(len); ~~~~~~~~~~~~~~~~~~~~~~~~~~~ If MSG_CTRUNC flags is set, msg->msg_controllen is less than CMSG_SPACE(len), "msg->msg_controllen -= cmlen" will cause unsinged int type msg->msg_controllen to be a large value. ~~~~~~~~~~~~~~~~~~~~~~~~~~~ msg->msg_control += cmlen; msg->msg_controllen -= cmlen; ~~~~~~~~~~~~~~~~~~~~~ err = 0; out: return err; } The same promble exists in put_cmsg_compat(). This patch can fix this problem. Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-12-20[NET] net/core/: Spelling fixesJoe Perches
Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-12-11[NET]: Fix wrong comments for unregister_net*Wang Chen
There are some return value comments for void functions. Fixed it. Signed-off-by: Wang Chen <wangchen@cn.fujitsu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-11-26[SKBUFF]: Free old skb properly in skb_morphHerbert Xu
The skb_morph function only freed the data part of the dst skb, but leaked the auxiliary data such as the netfilter fields. This patch fixes this by moving the relevant parts from __kfree_skb to skb_release_all and calling it in skb_morph. It also makes kfree_skbmem static since it's no longer called anywhere else and it now no longer does skb_release_data. Thanks to Yasuyuki KOZAKAI for finding this problem and posting a patch for it. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2007-11-19[PKTGEN]: Fix double unlock of xfrm_state->lockPavel Emelyanov
The pktgen_output_ipsec() function can unlock this lock twice due to merged error and plain paths. Remove one of the calls to spin_unlock. Other possible solution would be to place "return 0" right after the first unlock, but at this place the err is known to be 0, so these solutions are the same except for this one makes the code shorter. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-11-15[INET]: Fix potential kfree on vmalloc-ed area of request_sock_queuePavel Emelyanov
The request_sock_queue's listen_opt is either vmalloc-ed or kmalloc-ed depending on the number of table entries. Thus it is expected to be handled properly on free, which is done in the reqsk_queue_destroy(). However the error path in inet_csk_listen_start() calls the lite version of reqsk_queue_destroy, called __reqsk_queue_destroy, which calls the kfree unconditionally. Fix this and move the __reqsk_queue_destroy into a .c file as it looks too big to be inline. As David also noticed, this is an error recovery path only, so no locking is required and the lopt is known to be not NULL. reqsk_queue_yank_listen_sk is also now only used in net/core/request_sock.c so we should move it there too. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Acked-by: Eric Dumazet <dada1@cosmosbay.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-11-14[NET]: Remove notifier block from chain when register_netdevice_notifier failsPavel Emelyanov
Commit fcc5a03ac42564e9e255c1134dda47442289e466: [NET]: Allow netdev REGISTER/CHANGENAME events to fail makes the register_netdevice_notifier() handle the error from the NETDEV_REGISTER event, sent to the registering block. The bad news is that in this case the notifier block is not removed from the list, but the error is returned to the caller. In case the caller is in module init function and handles this error this can abort the module loading. The notifier block will be then removed from the kernel, but will be left in the list. Oops :( I think that the notifier block should be removed from the chain in case of error, regardless whether this error is handled by the caller or not. In the worst case (the error is _not_ handled) module will not receive the events any longer. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Acked-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-11-13[NET]: Move unneeded data to initdata section.Denis V. Lunev
This patch reverts Eric's commit 2b008b0a8e96b726c603c5e1a5a7a509b5f61e35 It diets .text & .data section of the kernel if CONFIG_NET_NS is not set. This is safe after list operations cleanup. Signed-of-by: Denis V. Lunev <den@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-11-13[NET]: Cleanup pernet operation without CONFIG_NET_NSDenis V. Lunev
If CONFIG_NET_NS is not set, the only namespace is possible. This patch removes list of pernet_operations and cleanups code a bit. This list is not needed if there are no namespaces. We should just call ->init method. Additionally, the ->exit will be called on module unloading only. This case is safe - the code is not discarded. For the in/kernel code, ->exit should never be called. Signed-off-by: Denis V. Lunev <den@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-11-12[NET]: Unexport sysctl_{r,w}mem_max.Adrian Bunk
sysctl_{r,w}mem_max can now be unexported. Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-11-10[INET]: Small possible memory leak in FIB rulesDenis V. Lunev
This patch fixes a small memory leak. Default fib rules can be deleted by the user if the rule does not carry FIB_RULE_PERMANENT flag, f.e. by ip rule flush Such a rule will not be freed as the ref-counter has 2 on start and becomes clearly unreachable after removal. Signed-off-by: Denis V. Lunev <den@openvz.org> Acked-by: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-11-10[NETNS]: init dev_base_lock only onceAlexey Dobriyan
* it already statically initialized * reinitializing live global spinlock every time netns is setup is also wrong Signed-off-by: Alexey Dobriyan <adobriyan@sw.ru> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-11-10[NET]: Fix infinite loop in dev_mc_unsync().Joe Perches
From: Joe Perches <joe@perches.com> Based upon an initial patch and report by Luis R. Rodriguez. Signed-off-by: David S. Miller <davem@davemloft.net>
2007-11-07[NET]: Clean proto_(un)register from in-code ifdefsPavel Emelyanov
The struct proto has the per-cpu "inuse" counter, which is handled with a special care. All the handling code hides under the ifdef CONFIG_SMP and it introduces some code duplication and makes it look worse than it could. Clean this. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-11-07[NETNS]: Fix compiler error in net_namespace.cJohann Felix Soden
Because net_free is called by copy_net_ns before its declaration, the compiler gives an error. This patch puts net_free before copy_net_ns to fix this. The compiler error: net/core/net_namespace.c: In function 'copy_net_ns': net/core/net_namespace.c:97: error: implicit declaration of function 'net_free' net/core/net_namespace.c: At top level: net/core/net_namespace.c:104: warning: conflicting types for 'net_free' net/core/net_namespace.c:104: error: static declaration of 'net_free' follows non-static declaration net/core/net_namespace.c:97: error: previous implicit declaration of 'net_free' was here The error was introduced by the '[NET]: Hide the dead code in the net_namespace.c' patch (6a1a3b9f686bb04820a232cc1657ef2c45670709). Signed-off-by: Johann Felix Soden <johfel@users.sourceforge.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-11-07[NET]: Removing duplicit #includesJiri Olsa
Removing duplicit #includes for net/ Signed-off-by: Jiri Olsa <olsajiri@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-11-07[NET]: Define infrastructure to keep 'inuse' changes in an efficent SMP/NUMA ↵Eric Dumazet
way. "struct proto" currently uses an array stats[NR_CPUS] to track change on 'inuse' sockets per protocol. If NR_CPUS is big, this means we use a big memory area for this. Moreover, all this memory area is located on a single node on NUMA machines, increasing memory pressure on the boot node. In this patch, I tried to : - Keep a fast !CONFIG_SMP implementation - Keep a fast CONFIG_SMP implementation for often used protocols (tcp,udp,raw,...) - Introduce a NUMA efficient implementation Some helper macros are defined in include/net/sock.h These macros take into account CONFIG_SMP If a "struct proto" is declared without using DEFINE_PROTO_INUSE / REF_PROTO_INUSE macros, it will automatically use a default implementation, using a dynamically allocated percpu zone. This default implementation will be NUMA efficient, but might use 32/64 bytes per possible cpu because of current alloc_percpu() implementation. However it still should be better than previous implementation based on stats[NR_CPUS] field. When a "struct proto" is changed to use the new macros, we use a single static "int" percpu variable, lowering the memory and cpu costs, still preserving NUMA efficiency. Signed-off-by: Eric Dumazet <dada1@cosmosbay.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-11-07[NET]: Remove /proc/net/stat/*_arp_cache upon module removalAlexey Dobriyan
neigh_table_init_no_netlink() creates them, but they aren't removed anywhere. Steps to reproduce: modprobe clip rmmod clip cat /proc/net/stat/clip_arp_cache BUG: unable to handle kernel paging request at virtual address f89d7758 printing eip: c05a99da *pdpt = 0000000000004001 *pde = 0000000004408067 *pte = 0000000000000000 Oops: 0000 [#1] PREEMPT SMP Modules linked in: atm af_packet ipv6 binfmt_misc sbs sbshc fan dock battery backlight ac power_supply parport loop rtc_cmos rtc_core rtc_lib serio_raw button k8temp hwmon amd_rng sr_mod cdrom shpchp pci_hotplug ehci_hcd ohci_hcd uhci_hcd usbcore Pid: 2082, comm: cat Not tainted (2.6.24-rc1-b1d08ac064268d0ae2281e98bf5e82627e0f0c56-bloat #4) EIP: 0060:[<c05a99da>] EFLAGS: 00210256 CPU: 0 EIP is at neigh_stat_seq_next+0x26/0x3f EAX: 00000001 EBX: f89d7600 ECX: c587bf40 EDX: 00000000 ESI: 00000000 EDI: 00000001 EBP: 00000400 ESP: c587bf1c DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068 Process cat (pid: 2082, ti=c587b000 task=c5984e10 task.ti=c587b000) Stack: c06228cc c5313790 c049e5c0 0804f000 c45a7b00 c53137b0 00000000 00000000 00000082 00000001 00000000 00000000 00000000 fffffffb c58d6780 c049e437 c45a7b00 c04b1f93 c587bfa0 00000400 0804f000 00000400 0804f000 c04b1f2f Call Trace: [<c049e5c0>] seq_read+0x189/0x281 [<c049e437>] seq_read+0x0/0x281 [<c04b1f93>] proc_reg_read+0x64/0x77 [<c04b1f2f>] proc_reg_read+0x0/0x77 [<c048907e>] vfs_read+0x80/0xd1 [<c0489491>] sys_read+0x41/0x67 [<c04080fa>] sysenter_past_esp+0x6b/0xc1 ======================= Code: e9 ec 8d 05 00 56 8b 11 53 8b 40 70 8b 58 3c eb 29 0f a3 15 80 91 7b c0 19 c0 85 c0 8d 42 01 74 17 89 c6 c1 fe 1f 89 01 89 71 04 <8b> 83 58 01 00 00 f7 d0 8b 04 90 eb 09 89 c2 83 fa 01 7e d2 31 EIP: [<c05a99da>] neigh_stat_seq_next+0x26/0x3f SS:ESP 0068:c587bf1c Signed-off-by: Alexey Dobriyan <adobriyan@sw.ru> Signed-off-by: David S. Miller <davem@davemloft.net>