summaryrefslogtreecommitdiffstats
path: root/net
AgeCommit message (Collapse)AuthorFilesLines
2016-12-07netfilter: xt_bpf: support ebpfWillem de Bruijn1-16/+80
Add support for attaching an eBPF object by file descriptor. The iptables binary can be called with a path to an elf object or a pinned bpf object. Also pass the mode and path to the kernel to be able to return it later for iptables dump and save. Signed-off-by: Willem de Bruijn <willemb@google.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2016-12-07netfilter: x_tables: avoid warn and OOM killer on vmalloc callMarcelo Ricardo Leitner1-1/+3
Andrey Konovalov reported that this vmalloc call is based on an userspace request and that it's spewing traces, which may flood the logs and cause DoS if abused. Florian Westphal also mentioned that this call should not trigger OOM killer. This patch brings the vmalloc call in sync to kmalloc and disables the warn trace on allocation failure and also disable OOM killer invocation. Note, however, that under such stress situation, other places may trigger OOM killer invocation. Reported-by: Andrey Konovalov <andreyknvl@google.com> Cc: Florian Westphal <fw@strlen.de> Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2016-12-07netfilter: nf_tables: support for set flushingPablo Neira Ayuso3-6/+51
This patch adds support for set flushing, that consists of walking over the set elements if the NFTA_SET_ELEM_LIST_ELEMENTS attribute is set. This patch requires the following changes: 1) Add set->ops->deactivate_one() operation: This allows us to deactivate an element from the set element walk path, given we can skip the lookup that happens in ->deactivate(). 2) Add a new nft_trans_alloc_gfp() function since we need to allocate transactions using GFP_ATOMIC given the set walk path happens with held rcu_read_lock. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2016-12-07netfilter: nft_set: introduce nft_{hash, rbtree}_deactivate_one()Pablo Neira Ayuso2-8/+27
This new function allows us to deactivate one single element, this is required by the set flush command that comes in a follow up patch. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2016-12-07netfilter: nf_tables: constify struct nft_ctx * parameter in nft_trans_alloc()Pablo Neira Ayuso1-2/+2
Context is not modified by nft_trans_alloc(), so constify it. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2016-12-07netfilter: nat: skip checksum on offload SCTP packetsDavide Caratti1-1/+4
SCTP GSO and hardware can do CRC32c computation after netfilter processing, so we can avoid calling sctp_compute_checksum() on skb if skb->ip_summed is equal to CHECKSUM_PARTIAL. Moreover, set skb->ip_summed to CHECKSUM_NONE when the NAT code computes the CRC, to prevent offloaders from computing it again (on ixgbe this resulted in a transmission with wrong L4 checksum). Signed-off-by: Davide Caratti <dcaratti@redhat.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2016-12-07netfilter: rpfilter: bypass ipv4 lbcast packets with zeronet sourceLiping Zhang2-9/+12
Otherwise, DHCP Discover packets(0.0.0.0->255.255.255.255) may be dropped incorrectly. Signed-off-by: Liping Zhang <zlpnobody@gmail.com> Acked-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2016-12-07netfilter: nf_tables: allow to filter stateful object dumps by typePablo Neira Ayuso1-0/+50
This patch adds the netlink code to filter out dump of stateful objects, through the NFTA_OBJ_TYPE netlink attribute. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2016-12-07netfilter: nft_objref: support for stateful object mapsPablo Neira Ayuso2-1/+119
This patch allows us to refer to stateful object dictionaries, the source register indicates the key data to be used to look up for the corresponding state object. We can refer to these maps through names or, alternatively, the map transaction id. This allows us to refer to both anonymous and named maps. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2016-12-07netfilter: nf_tables: add stateful object reference to set elementsPablo Neira Ayuso1-10/+62
This patch allows you to refer to stateful objects from set elements. This provides the infrastructure to create maps where the right hand side of the mapping is a stateful object. This allows us to build dictionaries of stateful objects, that you can use to perform fast lookups using any arbitrary key combination. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2016-12-07netfilter: nft_quota: add depleted flag for objectsPablo Neira Ayuso2-8/+29
Notify on depleted quota objects. The NFT_QUOTA_F_DEPLETED flag indicates we have reached overquota. Add pointer to table from nft_object, so we can use it when sending the depletion notification to userspace. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2016-12-07netfilter: nf_tables: notify internal updates of stateful objectsPablo Neira Ayuso1-12/+19
Introduce nf_tables_obj_notify() to notify internal state changes in stateful objects. This is used by the quota object to report depletion in a follow up patch. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2016-12-07netfilter: nf_tables: atomic dump and reset for stateful objectsPablo Neira Ayuso3-22/+81
This patch adds a new NFT_MSG_GETOBJ_RESET command perform an atomic dump-and-reset of the stateful object. This also comes with add support for atomic dump and reset for counter and quota objects. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2016-12-07netfilter: nft_quota: dump consumed quotaPablo Neira Ayuso1-5/+16
Add a new attribute NFTA_QUOTA_CONSUMED that displays the amount of quota that has been already consumed. This allows us to restore the internal state of the quota object between reboots as well as to monitor how wasted it is. This patch changes the logic to account for the consumed bytes, instead of the bytes that remain to be consumed. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2016-12-06netfilter: nf_tables: add stateful object reference expressionPablo Neira Ayuso3-0/+119
This new expression allows us to refer to existing stateful objects from rules. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2016-12-06netfilter: nft_quota: add stateful object typePablo Neira Ayuso1-13/+83
Register a new quota stateful object type into the new stateful object infrastructure. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2016-12-06netfilter: nft_counter: add stateful object typePablo Neira Ayuso1-27/+113
Register a new percpu counter stateful object type into the stateful object infrastructure. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2016-12-06netfilter: nf_tables: add stateful objectsPablo Neira Ayuso1-0/+516
This patch augments nf_tables to support stateful objects. This new infrastructure allows you to create, dump and delete stateful objects, that are identified by a user-defined name. This patch adds the generic infrastructure, follow up patches add support for two stateful objects: counters and quotas. This patch provides a native infrastructure for nf_tables to replace nfacct, the extended accounting infrastructure for iptables. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2016-12-06netfilter: add and use nf_fwd_netdev_egressFlorian Westphal2-10/+27
... so we can use current skb instead of working with a clone. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2016-12-06netfilter: xt_multiport: Fix wrong unmatch result with multiple portsGao Feng1-7/+19
I lost one test case in the last commit for xt_multiport. For example, the rule is "-m multiport --dports 22,80,443". When first port is unmatched and the second is matched, the curent codes could not return the right result. It would return false directly when the first port is unmatched. Fixes: dd2602d00f80 ("netfilter: xt_multiport: Use switch case instead of multiple condition checks") Signed-off-by: Gao Feng <fgao@ikuai8.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2016-12-06netfilter: nft_payload: layer 4 checksum adjustment for pseudoheader fieldsPablo Neira Ayuso1-5/+102
This patch adds a new flag that signals the kernel to update layer 4 checksum if the packet field belongs to the layer 4 pseudoheader. This implicitly provides stateless NAT 1:1 that is useful under very specific usecases. Since rules mangling layer 3 fields that are part of the pseudoheader may potentially convey any layer 4 packet, we have to deal with the layer 4 checksum adjustment using protocol specific code. This patch adds support for TCP, UDP and ICMPv6, since they include the pseudoheader in the layer 4 checksum calculation. ICMP doesn't, so we can skip it. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2016-12-06netfilter: nft_fib_ipv4: initialize *dest to zeroLiping Zhang1-0/+2
Otherwise, if fib lookup fail, *dest will be filled with garbage value, so reverse path filtering will not work properly: # nft add rule x prerouting fib saddr oif eq 0 drop Fixes: f6d0cbcf09c5 ("netfilter: nf_tables: add fib expression") Signed-off-by: Liping Zhang <zlpnobody@gmail.com> Acked-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2016-12-06netfilter: nft_fib: convert htonl to ntohl properlyLiping Zhang3-3/+3
Acctually ntohl and htonl are identical, so this doesn't affect anything, but it is conceptually wrong. Signed-off-by: Liping Zhang <zlpnobody@gmail.com> Acked-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2016-12-06netfilter: x_tables: pack percpu counter allocationsFlorian Westphal4-18/+42
instead of allocating each xt_counter individually, allocate 4k chunks and then use these for counter allocation requests. This should speed up rule evaluation by increasing data locality, also speeds up ruleset loading because we reduce calls to the percpu allocator. As Eric points out we can't use PAGE_SIZE, page_allocator would fail on arches with 64k page size. Suggested-by: Eric Dumazet <edumazet@google.com> Signed-off-by: Florian Westphal <fw@strlen.de> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2016-12-06netfilter: x_tables: pass xt_counters struct to counter allocatorFlorian Westphal4-12/+33
Keeps some noise away from a followup patch. Signed-off-by: Florian Westphal <fw@strlen.de> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2016-12-06netfilter: x_tables: pass xt_counters struct instead of packet counterFlorian Westphal4-7/+15
On SMP we overload the packet counter (unsigned long) to contain percpu offset. Hide this from callers and pass xt_counters address instead. Preparation patch to allocate the percpu counters in page-sized batch chunks. Signed-off-by: Florian Westphal <fw@strlen.de> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2016-12-06netfilter: convert while loops to for loopsAaron Conole2-8/+6
This is to facilitate converting from a singly-linked list to an array of elements. Signed-off-by: Aaron Conole <aconole@bytheb.org> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2016-12-06netfilter: introduce accessor functions for hook entriesAaron Conole3-10/+7
This allows easier future refactoring. Signed-off-by: Aaron Conole <aconole@bytheb.org> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2016-12-06netfilter: defrag: only register defrag functionality if neededFlorian Westphal6-19/+126
nf_defrag modules for ipv4 and ipv6 export an empty stub function. Any module that needs the defragmentation hooks registered simply 'calls' this empty function to create a phony module dependency -- modprobe will then load the defrag module too. This extends netfilter ipv4/ipv6 defragmentation modules to delay the hook registration until the functionality is requested within a network namespace instead of module load time for all namespaces. Hooks are only un-registered on module unload or when a namespace that used such defrag functionality exits. We have to use struct net for this as the register hooks can be called before netns initialization here from the ipv4/ipv6 conntrack module init path. There is no unregister functionality support, defrag will always be active once it was requested inside a net namespace. The reason is that defrag has impact on nft and iptables rulesets (without defrag we might see framents). Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2016-12-04netfilter: conntrack: add nf_conntrack_default_on sysctlFlorian Westphal2-1/+28
This switch (default on) can be used to disable automatic registration of connection tracking functionality in newly created network namespaces. This means that when net namespace goes down (or the tracker protocol module is unloaded) we *might* have to unregister the hooks. We can either add another per-netns variable that tells if the hooks got registered by default, or, alternatively, just call the protocol _put() function and have the callee deal with a possible 'extra' put() operation that doesn't pair with a get() one. This uses the latter approach, i.e. a put() without a get has no effect. Conntrack is still enabled automatically regardless of the new sysctl setting if the new net namespace requires connection tracking, e.g. when NAT rules are created. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2016-12-04netfilter: conntrack: register hooks in netns when needed by rulesetFlorian Westphal3-24/+123
This makes use of nf_ct_netns_get/put added in previous patch. We add get/put functions to nf_conntrack_l3proto structure, ipv4 and ipv6 then implement use-count to track how many users (nft or xtables modules) have a dependency on ipv4 and/or ipv6 connection tracking functionality. When count reaches zero, the hooks are unregistered. This delays activation of connection tracking inside a namespace until stateful firewall rule or nat rule gets added. This patch breaks backwards compatibility in the sense that connection tracking won't be active anymore when the protocol tracker module is loaded. This breaks e.g. setups that ctnetlink for flow accounting and the like, without any '-m conntrack' packet filter rules. Followup patch restores old behavour and makes new delayed scheme optional via sysctl. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2016-12-04netfilter: nf_tables: add conntrack dependencies for nat/masq/redir expressionsFlorian Westphal7-3/+40
so that conntrack core will add the needed hooks in this namespace. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2016-12-04netfilter: nat: add dependencies on conntrack moduleFlorian Westphal4-6/+43
MASQUERADE, S/DNAT and REDIRECT already call functions that depend on the conntrack module. However, since the conntrack hooks are now registered in a lazy fashion (i.e., only when needed) a symbol reference is not enough. Thus, when something is added to a nat table, make sure that it will see packets by calling nf_ct_netns_get() which will register the conntrack hooks in the current netns. An alternative would be to add these dependencies to the NAT table. However, that has problems when using non-modular builds -- we might register e.g. ipv6 conntrack before its initcall has run, leading to NULL deref crashes since its per-netns storage has not yet been allocated. Adding the dependency in the modules instead has the advantage that nat table also does not register its hooks until rules are added. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2016-12-04netfilter: add and use nf_ct_netns_get/putFlorian Westphal14-42/+54
currently aliased to try_module_get/_put. Will be changed in next patch when we add functions to make use of ->net argument to store usercount per l3proto tracker. This is needed to avoid registering the conntrack hooks in all netns and later only enable connection tracking in those that need conntrack. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2016-12-04netfilter: conntrack: remove unused init_net hookFlorian Westphal2-14/+0
since adf0516845bcd0 ("netfilter: remove ip_conntrack* sysctl compat code") the only user (ipv4 tracker) sets this to an empty stub function. After this change nf_ct_l3proto_pernet_register() is also empty, but this will change in a followup patch to add conditional register of the hooks. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2016-12-04netfilter: conntrack: built-in support for UDPliteDavide Caratti5-73/+19
CONFIG_NF_CT_PROTO_UDPLITE is no more a tristate. When set to y, connection tracking support for UDPlite protocol is built-in into nf_conntrack.ko. footprint test: $ ls -l net/netfilter/nf_conntrack{_proto_udplite,}.ko \ net/ipv4/netfilter/nf_conntrack_ipv4.ko \ net/ipv6/netfilter/nf_conntrack_ipv6.ko (builtin)|| udplite| ipv4 | ipv6 |nf_conntrack ---------++--------+--------+--------+-------------- none || 432538 | 828755 | 828676 | 6141434 UDPlite || - | 829649 | 829362 | 6498204 Signed-off-by: Davide Caratti <dcaratti@redhat.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2016-12-04netfilter: conntrack: built-in support for SCTPDavide Caratti5-72/+19
CONFIG_NF_CT_PROTO_SCTP is no more a tristate. When set to y, connection tracking support for SCTP protocol is built-in into nf_conntrack.ko. footprint test: $ ls -l net/netfilter/nf_conntrack{_proto_sctp,}.ko \ net/ipv4/netfilter/nf_conntrack_ipv4.ko \ net/ipv6/netfilter/nf_conntrack_ipv6.ko (builtin)|| sctp | ipv4 | ipv6 | nf_conntrack ---------++--------+--------+--------+-------------- none || 498243 | 828755 | 828676 | 6141434 SCTP || - | 829254 | 829175 | 6547872 Signed-off-by: Davide Caratti <dcaratti@redhat.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2016-12-04netfilter: conntrack: built-in support for DCCPDavide Caratti5-74/+20
CONFIG_NF_CT_PROTO_DCCP is no more a tristate. When set to y, connection tracking support for DCCP protocol is built-in into nf_conntrack.ko. footprint test: $ ls -l net/netfilter/nf_conntrack{_proto_dccp,}.ko \ net/ipv4/netfilter/nf_conntrack_ipv4.ko \ net/ipv6/netfilter/nf_conntrack_ipv6.ko (builtin)|| dccp | ipv4 | ipv6 | nf_conntrack ---------++--------+--------+--------+-------------- none || 469140 | 828755 | 828676 | 6141434 DCCP || - | 830566 | 829935 | 6533526 Signed-off-by: Davide Caratti <dcaratti@redhat.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2016-12-04Merge tag 'ipvs-for-v4.10' of ↵Pablo Neira Ayuso2-1/+55
https://git.kernel.org/pub/scm/linux/kernel/git/horms/ipvs-next Simon Horman says: ==================== IPVS Updates for v4.10 please consider these enhancements to the IPVS for v4.10. * Decrement the IP ttl in all the modes in order to prevent infinite route loops. Thanks to Dwip Banerjee. * Use IS_ERR_OR_NULL macro. Clean-up from Gao Feng. ==================== Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2016-12-04netfilter: nfnetlink_log: add "nf-logger-5-1" module alias nameLiping Zhang1-0/+1
So we can autoload nfnetlink_log.ko when the user adding nft log group X rule in netdev family. Signed-off-by: Liping Zhang <zlpnobody@gmail.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2016-12-04netfilter: nf_log: do not assume ethernet header in netdev familyLiping Zhang3-3/+6
In netdev family, we will handle non ethernet packets, so using eth_hdr(skb)->h_proto is incorrect. Meanwhile, we can use socket(AF_PACKET...) to sending packets, so skb->protocol is not always set in bridge family. Add an extra parameter into nf_log_l2packet to solve this issue. Fixes: 1fddf4bad0ac ("netfilter: nf_log: add packet logging for netdev family") Signed-off-by: Liping Zhang <zlpnobody@gmail.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2016-12-04netfilter: built-in NAT support for UDPliteDavide Caratti4-38/+8
CONFIG_NF_NAT_PROTO_UDPLITE is no more a tristate. When set to y, NAT support for UDPlite protocol is built-in into nf_nat.ko. footprint test: (nf_nat_proto_) |udplite || nf_nat --------------------------+--------++-------- no builtin | 408048 || 2241312 UDPLITE builtin | - || 2577256 Signed-off-by: Davide Caratti <dcaratti@redhat.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2016-12-04netfilter: built-in NAT support for SCTPDavide Caratti4-36/+7
CONFIG_NF_NAT_PROTO_SCTP is no more a tristate. When set to y, NAT support for SCTP protocol is built-in into nf_nat.ko. footprint test: (nf_nat_proto_) | sctp || nf_nat --------------------------+--------++-------- no builtin | 428344 || 2241312 SCTP builtin | - || 2597032 Signed-off-by: Davide Caratti <dcaratti@redhat.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2016-12-04netfilter: built-in NAT support for DCCPDavide Caratti4-37/+8
CONFIG_NF_NAT_PROTO_DCCP is no more a tristate. When set to y, NAT support for DCCP protocol is built-in into nf_nat.ko. footprint test: (nf_nat_proto_) | dccp || nf_nat --------------------------+--------++-------- no builtin | 409800 || 2241312 DCCP builtin | - || 2578968 Signed-off-by: Davide Caratti <dcaratti@redhat.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2016-12-04netfilter: update Arturo Borrero Gonzalez email addressArturo Borrero Gonzalez6-12/+12
The email address has changed, let's update the copyright statements. Signed-off-by: Arturo Borrero Gonzalez <arturo@debian.org> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2016-12-03ipv6 addrconf: Implemented enhanced DAD (RFC7527)Erik Nordmark3-5/+48
Implemented RFC7527 Enhanced DAD. IPv6 duplicate address detection can fail if there is some temporary loopback of Ethernet frames. RFC7527 solves this by including a random nonce in the NS messages used for DAD, and if an NS is received with the same nonce it is assumed to be a looped back DAD probe and is ignored. RFC7527 is enabled by default. Can be disabled by setting both of conf/{all,interface}/enhanced_dad to zero. Signed-off-by: Erik Nordmark <nordmark@arista.com> Signed-off-by: Bob Gilligan <gilligan@arista.com> Reviewed-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-12-03ipv4: fib: Replay events when registering FIB notifierIdo Schimmel1-2/+146
Commit b90eb7549499 ("fib: introduce FIB notification infrastructure") introduced a new notification chain to notify listeners (f.e., switchdev drivers) about addition and deletion of routes. However, upon registration to the chain the FIB tables can already be populated, which means potential listeners will have an incomplete view of the tables. Solve that by dumping the FIB tables and replaying the events to the passed notification block. The dump itself is done using RCU in order not to starve consumers that need RTNL to make progress. The integrity of the dump is ensured by reading the FIB change sequence counter before and after the dump under RTNL. This allows us to avoid the problematic situation in which the dumping process sends a ENTRY_ADD notification following ENTRY_DEL generated by another process holding RTNL. Callers of the registration function may pass a callback that is executed in case the dump was inconsistent with current FIB tables. The number of retries until a consistent dump is achieved is set to a fixed number to prevent callers from looping for long periods of time. In case current limit proves to be problematic in the future, it can be easily converted to be configurable using a sysctl. Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-12-03ipv4: fib: Allow for consistent FIB dumpingIdo Schimmel2-0/+3
The next patch will enable listeners of the FIB notification chain to request a dump of the FIB tables. However, since RTNL isn't taken during the dump, it's possible for the FIB tables to change mid-dump, which will result in inconsistency between the listener's table and the kernel's. Allow listeners to know about changes that occurred mid-dump, by adding a change sequence counter to each net namespace. The counter is incremented just before a notification is sent in the FIB chain. Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-12-03ipv4: fib: Convert FIB notification chain to be atomicIdo Schimmel1-4/+4
In order not to hold RTNL for long periods of time we're going to dump the FIB tables using RCU. Convert the FIB notification chain to be atomic, as we can't block in RCU critical sections. Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-12-03ipv4: fib: Export free_fib_info()Ido Schimmel1-0/+1
The FIB notification chain is going to be converted to an atomic chain, which means switchdev drivers will have to offload FIB entries in deferred work, as hardware operations entail sleeping. However, while the work is queued fib info might be freed, so a reference must be taken. To release the reference (and potentially free the fib info) fib_info_put() will be called, which in turn calls free_fib_info(). Export free_fib_info() so that modules will be able to invoke fib_info_put(). Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-03 16:33:34 +0000