- 18 12月, 2013 1 次提交
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由 stephen hemminger 提交于
These function to manipulate multiple addresses are not used anywhere in current net-next tree. Some out of tree code maybe using these but too bad; they should submit their code upstream.. Also, make __hw_addr_flush local since only used by dev_addr_lists.c Signed-off-by: NStephen Hemminger <stephen@networkplumber.org> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 14 12月, 2013 1 次提交
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由 dingtianhong 提交于
The bond_first_slave_rcu() will be used to instead of bond_first_slave() in rcu_read_lock(). According to the Jay Vosburgh's suggestion, the struct netdev_adjacent should hide from users who wanted to use it directly. so I package a new function to get the first slave of the bond. Suggested-by: NNikolay Aleksandrov <nikolay@redhat.com> Suggested-by: NJay Vosburgh <fubar@us.ibm.com> Suggested-by: NVeaceslav Falico <vfalico@redhat.com> Signed-off-by: NDing Tianhong <dingtianhong@huawei.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 13 12月, 2013 1 次提交
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由 Jerry Chu 提交于
This patch modifies the GRO stack to avoid the use of "network_header" and associated macros like ip_hdr() and ipv6_hdr() in order to allow an arbitary number of IP hdrs (v4 or v6) to be used in the encapsulation chain. This lays the foundation for various IP tunneling support (IP-in-IP, GRE, VXLAN, SIT,...) to be added later. With this patch, the GRO stack traversing now is mostly based on skb_gro_offset rather than special hdr offsets saved in skb (e.g., skb->network_header). As a result all but the top layer (i.e., the the transport layer) must have hdrs of the same length in order for a pkt to be considered for aggregation. Therefore when adding a new encap layer (e.g., for tunneling), one must check and skip flows (e.g., by setting NAPI_GRO_CB(p)->same_flow to 0) that have a different hdr length. Note that unlike the network header, the transport header can and will continue to be set by the GRO code since there will be at most one "transport layer" in the encap chain. Signed-off-by: NH.K. Jerry Chu <hkchu@google.com> Suggested-by: NEric Dumazet <edumazet@google.com> Reviewed-by: NEric Dumazet <edumazet@google.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 12 12月, 2013 1 次提交
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由 Jiri Benc 提交于
RFC 4191 states in 3.5: When a host avoids using any non-reachable router X and instead sends a data packet to another router Y, and the host would have used router X if router X were reachable, then the host SHOULD probe each such router X's reachability by sending a single Neighbor Solicitation to that router's address. A host MUST NOT probe a router's reachability in the absence of useful traffic that the host would have sent to the router if it were reachable. In any case, these probes MUST be rate-limited to no more than one per minute per router. Currently, when the neighbour corresponding to a router falls into NUD_FAILED, it's never considered again. Introduce a new rt6_nud_state value, RT6_NUD_FAIL_PROBE, which suggests the route should not be used but should be probed with a single NS. The probe is ratelimited by the existing code. To better distinguish meanings of the failure values, rename RT6_NUD_FAIL_SOFT to RT6_NUD_FAIL_DO_RR. Signed-off-by: NJiri Benc <jbenc@redhat.com> Acked-by: NHannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 11 12月, 2013 2 次提交
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由 stephen hemminger 提交于
Various spelling fixes in networking stack Signed-off-by: NStephen Hemminger <stephen@networkplumber.org> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Jiri Pirko 提交于
This fixes compile error when CONFIG_NET_NS is not set. Introduced by: commit 1d4c8c29 "neigh: restore old behaviour of default parms values" Signed-off-by: NJiri Pirko <jiri@resnulli.us> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 10 12月, 2013 6 次提交
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由 Jiri Pirko 提交于
Make the behaviour similar to ipv4. This will allow user to set sysctl default neigh param values and these values will be respected even by devices registered before (that ones what do not have address set yet). Signed-off-by: NJiri Pirko <jiri@resnulli.us> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Jiri Pirko 提交于
Previously inet devices were only constructed when addresses are added. Therefore the default neigh parms values they get are the ones at the time of these operations. Now that we're creating inet devices earlier, this changes the behaviour of default neigh parms values in an incompatible way (see bug #8519). This patch creates a compromise by setting the default values at the same point as before but only for those that have not been explicitly set by the user since the inet device's creation. Introduced by: commit 8030f544 Author: Herbert Xu <herbert@gondor.apana.org.au> Date: Thu Feb 22 01:53:47 2007 +0900 [IPV4] devinet: Register inetdev earlier. Signed-off-by: NJiri Pirko <jiri@resnulli.us> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Jiri Pirko 提交于
Signed-off-by: NJiri Pirko <jiri@resnulli.us> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Jiri Pirko 提交于
This will be needed later on to provide better management of default values. Signed-off-by: NJiri Pirko <jiri@resnulli.us> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Jiri Pirko 提交于
This patch converts the neigh param members to an array. This allows easier manipulation which will be needed later on to provide better management of default values. Signed-off-by: NJiri Pirko <jiri@resnulli.us> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Daniel Borkmann 提交于
As we need it elsewhere, move the inline helper function of skb_needs_linearize() over to skbuff.h include file. While at it, also convert the return to 'bool' instead of 'int' and add a proper kernel doc. Signed-off-by: NDaniel Borkmann <dborkman@redhat.com> Signed-off-by: NJesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 07 12月, 2013 2 次提交
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由 Eric Dumazet 提交于
Some network drivers use dev_kfree_skb_any() and dev_kfree_skb_irq() helpers to free skbs, both for dropped packets and TX completed ones. We need to separate the two causes to get better diagnostics given by dropwatch or "perf record -e skb:kfree_skb" This patch provides two new helpers, dev_consume_skb_any() and dev_consume_skb_irq() to be used for consumed skbs. __dev_kfree_skb_irq() is slightly optimized to remove one atomic_dec_and_test() in fast path, and use this_cpu_{r|w} accessors. Signed-off-by: NEric Dumazet <edumazet@google.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Eric Dumazet 提交于
Remove one useless conditional branch : napi->skb is NULL, so nothing bad can happen. Signed-off-by: NEric Dumazet <edumazet@google.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 06 12月, 2013 1 次提交
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由 Hannes Frederic Sowa 提交于
We must clear local_df when passing the skb between namespaces as the packet is not local to the new namespace any more and thus may not get fragmented by local rules. Fred Templin noticed that other namespaces do fragment IPv6 packets while forwarding. Instead they should have send back a PTB. The same problem should be present when forwarding DF-IPv4 packets between namespaces. Reported-by: NTemplin, Fred L <Fred.L.Templin@boeing.com> Signed-off-by: NHannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 02 12月, 2013 1 次提交
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由 fan.du 提交于
commit a553e4a6 ("[PKTGEN]: IPSEC support") tried to support IPsec ESP transport transformation for pktgen, but acctually this doesn't work at all for two reasons(The orignal transformed packet has bad IPv4 checksum value, as well as wrong auth value, reported by wireshark) - After transpormation, IPv4 header total length needs update, because encrypted payload's length is NOT same as that of plain text. - After transformation, IPv4 checksum needs re-caculate because of payload has been changed. With this patch, armmed pktgen with below cofiguration, Wireshark is able to decrypted ESP packet generated by pktgen without any IPv4 checksum error or auth value error. pgset "flag IPSEC" pgset "flows 1" Signed-off-by: NFan Du <fan.du@windriver.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 22 11月, 2013 1 次提交
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由 Herbert Xu 提交于
Recently GRO started generating packets with frag_lists of frags. This was not handled by GSO, thus leading to a crash. Thankfully these packets are of a regular form and are easy to handle. This patch handles them in two ways. For completely non-linear frag_list entries, we simply continue to iterate over the frag_list frags once we exhaust the normal frags. For frag_list entries with linear parts, we call pskb_trim on the first part of the frag_list skb, and then process the rest of the frags in the usual way. This patch also kills a chunk of dead frag_list code that has obviously never ever been run since it ends up generating a bogus GSO-segmented packet with a frag_list entry. Future work is planned to split super big packets into TSO ones. Fixes: 8a29111c ("net: gro: allow to build full sized skb") Reported-by: NChristoph Paasch <christoph.paasch@uclouvain.be> Reported-by: NJerry Chu <hkchu@google.com> Reported-by: NSander Eikelenboom <linux@eikelenboom.it> Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au> Signed-off-by: NEric Dumazet <edumazet@google.com> Tested-by: NSander Eikelenboom <linux@eikelenboom.it> Tested-by: NEric Dumazet <edumazet@google.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 21 11月, 2013 2 次提交
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由 Hannes Frederic Sowa 提交于
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must set msg_namelen to the proper size <= sizeof(struct sockaddr_storage) to return msg_name to the user. This prevents numerous uninitialized memory leaks we had in the recvmsg handlers and makes it harder for new code to accidentally leak uninitialized memory. Optimize for the case recvfrom is called with NULL as address. We don't need to copy the address at all, so set it to NULL before invoking the recvmsg handler. We can do so, because all the recvmsg handlers must cope with the case a plain read() is called on them. read() also sets msg_name to NULL. Also document these changes in include/linux/net.h as suggested by David Miller. Changes since RFC: Set msg->msg_name = NULL if user specified a NULL in msg_name but had a non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't affect sendto as it would bail out earlier while trying to copy-in the address. It also more naturally reflects the logic by the callers of verify_iovec. With this change in place I could remove " if (!uaddr || msg_sys->msg_namelen == 0) msg->msg_name = NULL ". This change does not alter the user visible error logic as we ignore msg_namelen as long as msg_name is NULL. Also remove two unnecessary curly brackets in ___sys_recvmsg and change comments to netdev style. Cc: David Miller <davem@davemloft.net> Suggested-by: NEric Dumazet <eric.dumazet@gmail.com> Signed-off-by: NHannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Vlad Yasevich 提交于
The following commit: b6c40d68 net: only invoke dev->change_rx_flags when device is UP tried to fix a problem with VLAN devices and promiscuouse flag setting. The issue was that VLAN device was setting a flag on an interface that was down, thus resulting in bad promiscuity count. This commit blocked flag propagation to any device that is currently down. A later commit: deede2fa vlan: Don't propagate flag changes on down interfaces fixed VLAN code to only propagate flags when the VLAN interface is up, thus fixing the same issue as above, only localized to VLAN. The problem we have now is that if we have create a complex stack involving multiple software devices like bridges, bonds, and vlans, then it is possible that the flags would not propagate properly to the physical devices. A simple examle of the scenario is the following: eth0----> bond0 ----> bridge0 ---> vlan50 If bond0 or eth0 happen to be down at the time bond0 is added to the bridge, then eth0 will never have promisc mode set which is currently required for operation as part of the bridge. As a result, packets with vlan50 will be dropped by the interface. The only 2 devices that implement the special flag handling are VLAN and DSA and they both have required code to prevent incorrect flag propagation. As a result we can remove the generic solution introduced in b6c40d68 and leave it to the individual devices to decide whether they will block flag propagation or not. Reported-by: NStefan Priebe <s.priebe@profihost.ag> Suggested-by: NVeaceslav Falico <vfalico@redhat.com> Signed-off-by: NVlad Yasevich <vyasevic@redhat.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 20 11月, 2013 5 次提交
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由 Johannes Berg 提交于
Register generic netlink multicast groups as an array with the family and give them contiguous group IDs. Then instead of passing the global group ID to the various functions that send messages, pass the ID relative to the family - for most families that's just 0 because the only have one group. This avoids the list_head and ID in each group, adding a new field for the mcast group ID offset to the family. At the same time, this allows us to prevent abusing groups again like the quota and dropmon code did, since we can now check that a family only uses a group it owns. Signed-off-by: NJohannes Berg <johannes.berg@intel.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Johannes Berg 提交于
This doesn't really change anything, but prepares for the next patch that will change the APIs to pass the group ID within the family, rather than the global group ID. Signed-off-by: NJohannes Berg <johannes.berg@intel.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Johannes Berg 提交于
The drop monitor code is abusing the genetlink API and is statically using the generic netlink multicast group 1, even if that group belongs to somebody else (which it invariably will, since it's not reserved.) Make the drop monitor code use the proper APIs to reserve a group ID, but also reserve the group id 1 in generic netlink code to preserve the userspace API. Since drop monitor can be a module, don't clear the bit for it on unregistration. Acked-by: NNeil Horman <nhorman@tuxdriver.com> Signed-off-by: NJohannes Berg <johannes.berg@intel.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Johannes Berg 提交于
As suggested by David Miller, make genl_register_family_with_ops() a macro and pass only the array, evaluating ARRAY_SIZE() in the macro, this is a little safer. The openvswitch has some indirection, assing ops/n_ops directly in that code. This might ultimately just assign the pointers in the family initializations, saving the struct genl_family_and_ops and code (once mcast groups are handled differently.) Signed-off-by: NJohannes Berg <johannes.berg@intel.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Ben Hutchings 提交于
SIOCSHWTSTAMP returns the real configuration to the application using it, but there is currently no way for any other application to find out the configuration non-destructively. Add a new ioctl for this, making it unprivileged. Signed-off-by: NBen Hutchings <bhutchings@solarflare.com>
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- 16 11月, 2013 1 次提交
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由 Michal Kubeček 提交于
A macvlan device has always LRO disabled so that calling dev_disable_lro() on it does nothing. If we need to disable LRO e.g. because - the macvlan device is inserted into a bridge - IPv6 forwarding is enabled for it - it is in a different namespace than lowerdev and IPv4 forwarding is enabled in it we need to disable LRO on its underlying device instead (as we do for 802.1q VLAN devices). v2: use newly introduced netif_is_macvlan() Signed-off-by: NMichal Kubecek <mkubecek@suse.cz> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 15 11月, 2013 1 次提交
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由 Johannes Berg 提交于
Now that genl_ops are no longer modified in place when registering, they can be made const. This patch was done mostly with spatch: @@ identifier ops; @@ +const struct genl_ops ops[] = { ... }; (except the struct thing in net/openvswitch/datapath.c) Signed-off-by: NJohannes Berg <johannes.berg@intel.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 14 11月, 2013 1 次提交
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由 Alexei Starovoitov 提交于
commit 06a23fe3 ("core/dev: set pkt_type after eth_type_trans() in dev_forward_skb()") and refactoring 64261f23 ("dev: move skb_scrub_packet() after eth_type_trans()") are forcing pkt_type to be PACKET_HOST when skb traverses veth. which means that ip forwarding will kick in inside netns even if skb->eth->h_dest != dev->dev_addr Fix order of eth_type_trans() and skb_scrub_packet() in dev_forward_skb() and in ip_tunnel_rcv() Fixes: 06a23fe3 ("core/dev: set pkt_type after eth_type_trans() in dev_forward_skb()") CC: Isaku Yamahata <yamahatanetdev@gmail.com> CC: Maciej Zenczykowski <zenczykowski@gmail.com> CC: Nicolas Dichtel <nicolas.dichtel@6wind.com> Signed-off-by: NAlexei Starovoitov <ast@plumgrid.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 11 11月, 2013 1 次提交
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由 Jiri Pirko 提交于
Pushing original fragments through causes several problems. For example for matching, frags may not be matched correctly. Take following example: <example> On HOSTA do: ip6tables -I INPUT -p icmpv6 -j DROP ip6tables -I INPUT -p icmpv6 -m icmp6 --icmpv6-type 128 -j ACCEPT and on HOSTB you do: ping6 HOSTA -s2000 (MTU is 1500) Incoming echo requests will be filtered out on HOSTA. This issue does not occur with smaller packets than MTU (where fragmentation does not happen) </example> As was discussed previously, the only correct solution seems to be to use reassembled skb instead of separete frags. Doing this has positive side effects in reducing sk_buff by one pointer (nfct_reasm) and also the reams dances in ipvs and conntrack can be removed. Future plan is to remove net/ipv6/netfilter/nf_conntrack_reasm.c entirely and use code in net/ipv6/reassembly.c instead. Signed-off-by: NJiri Pirko <jiri@resnulli.us> Acked-by: NJulian Anastasov <ja@ssi.bg> Signed-off-by: NMarcelo Ricardo Leitner <mleitner@redhat.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 09 11月, 2013 2 次提交
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由 Andreas Henriksson 提交于
When trying to delete a table >= 256 using iproute2 the local table will be deleted. The table id is specified as a netlink attribute when it needs more then 8 bits and iproute2 then sets the table field to RT_TABLE_UNSPEC (0). Preconditions to matching the table id in the rule delete code doesn't seem to take the "table id in netlink attribute" into condition so the frh_get_table helper function never gets to do its job when matching against current rule. Use the helper function twice instead of peaking at the table value directly. Originally reported at: http://bugs.debian.org/724783Reported-by: NNicolas HICHER <nhicher@avencall.com> Signed-off-by: NAndreas Henriksson <andreas@fatal.se> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Eric Dumazet 提交于
By moving code around, we avoid : 1) A reload of iph->ihl (bit field, so needs a mask) 2) A conditional test (replaced by a conditional mov on x86) Fast path loads iph->protocol anyway. Signed-off-by: NEric Dumazet <edumazet@google.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 08 11月, 2013 3 次提交
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由 Mathias Krause 提交于
Use "@" to refer to parameters in the kernel-doc description. According to Documentation/kernel-doc-nano-HOWTO.txt "&" shall be used to refer to structures only. Signed-off-by: NMathias Krause <mathias.krause@secunet.com> Cc: "David S. Miller" <davem@davemloft.net> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Mathias Krause 提交于
This function has usage beside IPsec so move it to the core skbuff code. While doing so, give it some documentation and change its return type to 'unsigned char *' to be in line with skb_put(). Signed-off-by: NMathias Krause <mathias.krause@secunet.com> Cc: Steffen Klassert <steffen.klassert@secunet.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 John Fastabend 提交于
Add a operations structure that allows a network interface to export the fact that it supports package forwarding in hardware between physical interfaces and other mac layer devices assigned to it (such as macvlans). This operaions structure can be used by virtual mac devices to bypass software switching so that forwarding can be done in hardware more efficiently. Signed-off-by: NJohn Fastabend <john.r.fastabend@intel.com> Signed-off-by: NNeil Horman <nhorman@tuxdriver.com> CC: Andy Gospodarek <andy@greyhouse.net> CC: "David S. Miller" <davem@davemloft.net> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 05 11月, 2013 2 次提交
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由 Jason Wang 提交于
Sometimes we need to coalesce the rx frags to avoid frag list. One example is virtio-net driver which tries to use small frags for both MTU sized packet and GSO packet. So this patch introduce skb_coalesce_rx_frag() to do this. Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Michael S. Tsirkin <mst@redhat.com> Cc: Michael Dalton <mwdalton@google.com> Cc: Eric Dumazet <edumazet@google.com> Acked-by: NMichael S. Tsirkin <mst@redhat.com> Signed-off-by: NJason Wang <jasowang@redhat.com> Acked-by: NEric Dumazet <edumazet@google.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Daniel Borkmann 提交于
This patch fixes a build warning in skb_checksum() by wrapping the csum_partial() usage in skb_checksum(). The problem is that on a few architectures, csum_partial is used with prefix asmlinkage whereas on most architectures it's not. So fix this up generically as we did with csum_block_add_ext() to match the signature. Introduced by 2817a336 ("net: skb_checksum: allow custom update/combine for walking skb"). Reported-by: NFengguang Wu <fengguang.wu@intel.com> Signed-off-by: NDaniel Borkmann <dborkman@redhat.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 04 11月, 2013 2 次提交
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由 Eric Dumazet 提交于
Joby Poriyath provided a xen-netback patch to reduce the size of xenvif structure as some netdev allocation could fail under memory pressure/fragmentation. This patch is handling the problem at the core level, allowing any netdev structures to use vmalloc() if kmalloc() failed. As vmalloc() adds overhead on a critical network path, add __GFP_REPEAT to kzalloc() flags to do this fallback only when really needed. Signed-off-by: NEric Dumazet <edumazet@google.com> Reported-by: NJoby Poriyath <joby.poriyath@citrix.com> Cc: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Daniel Borkmann 提交于
Currently, skb_checksum walks over 1) linearized, 2) frags[], and 3) frag_list data and calculats the one's complement, a 32 bit result suitable for feeding into itself or csum_tcpudp_magic(), but unsuitable for SCTP as we're calculating CRC32c there. Hence, in order to not re-implement the very same function in SCTP (and maybe other protocols) over and over again, use an update() + combine() callback internally to allow for walking over the skb with different algorithms. Signed-off-by: NDaniel Borkmann <dborkman@redhat.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 02 11月, 2013 1 次提交
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由 Jason Wang 提交于
We don't validate iph->ihl which may lead a dead loop if we meet a IPIP skb whose iph->ihl is zero. Fix this by failing immediately when iph->ihl is evil (less than 5). This issue were introduced by commit ec5efe79 (rps: support IPIP encapsulation). Cc: Eric Dumazet <edumazet@google.com> Cc: Petr Matousek <pmatouse@redhat.com> Cc: Michael S. Tsirkin <mst@redhat.com> Cc: Daniel Borkmann <dborkman@redhat.com> Signed-off-by: NJason Wang <jasowang@redhat.com> Acked-by: NEric Dumazet <edumazet@google.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 29 10月, 2013 2 次提交
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由 Zhi Yong Wu 提交于
Signed-off-by: NZhi Yong Wu <wuzhy@linux.vnet.ibm.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Zhi Yong Wu 提交于
Signed-off-by: NZhi Yong Wu <wuzhy@linux.vnet.ibm.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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