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path: root/include/net/ip_fib.h
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2011-04-14ipv4: Call fib_select_default() only when actually necessary.David S. Miller1-1/+2
fib_select_default() is a complete NOP, and completely pointless to invoke, when we have no more than 1 default route installed. And this is far and away the common case. So remember how many prefixlen==0 routes we have in the routing table, and elide the call when we have no more than one of those. This cuts output route creation time by 157 cycles on Niagara2+. In order to add the new int to fib_table, we have to correct the type of ->tb_data[] to unsigned long, otherwise the private area will be unaligned on 64-bit systems. Signed-off-by: David S. Miller <davem@davemloft.net> Reviewed-by: Eric Dumazet <eric.dumazet@gmail.com>
2011-04-10fib_validate_source(): pass sk_buff instead of markMichael Smith1-3/+3
This makes sk_buff available for other use in fib_validate_source(). Signed-off-by: Michael Smith <msmith@cbnco.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-03-24ipv4: Fix nexthop caching wrt. scoping.David S. Miller1-3/+3
Move the scope value out of the fib alias entries and into fib_info, so that we always use the correct scope when recomputing the nexthop cached source address. Reported-by: Julian Anastasov <ja@ssi.bg> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-03-24ipv4: Invalidate nexthop cache nh_saddr more correctly.David S. Miller1-2/+10
Any operation that: 1) Brings up an interface 2) Adds an IP address to an interface 3) Deletes an IP address from an interface can potentially invalidate the nh_saddr value, requiring it to be recomputed. Perform the recomputation lazily using a generation ID. Reported-by: Julian Anastasov <ja@ssi.bg> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-03-12ipv4: Pass ipv4 flow objects into fib_lookup() paths.David S. Miller1-3/+3
To start doing these conversions, we need to add some temporary flow4_* macros which will eventually go away when all the protocol code paths are changed to work on AF specific flowi objects. Signed-off-by: David S. Miller <davem@davemloft.net>
2011-03-10ipv4: Kill flowi arg to fib_select_multipath()David S. Miller1-1/+1
Completely unused. Signed-off-by: David S. Miller <davem@davemloft.net>
2011-03-08ipv4: Fix scope value used in route src-address caching.David S. Miller1-0/+1
We have to use cfg->fc_scope not the final nh_scope value. Reported-by: Julian Anastasov <ja@ssi.bg> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-03-07ipv4: Cache source address in nexthop entries.David S. Miller1-2/+5
When doing output route lookups, we have to select the source address if the user has not specified an explicit one. First, if the route has an explicit preferred source address specified, then we use that. Otherwise we search the route's outgoing interface for a suitable address. This search can be precomputed and cached at route insertion time. The only missing part is that we have to refresh this precomputed value any time addresses are added or removed from the interface, and this is accomplished by fib_update_nh_saddrs(). Signed-off-by: David S. Miller <davem@davemloft.net>
2011-02-17ipv4: Use const'ify fib_result deep in the route call chains.David S. Miller1-1/+1
The only troublesome bit here is __mkroute_output which wants to override res->fi and res->type, compute those in local variables instead. Signed-off-by: David S. Miller <davem@davemloft.net>
2011-02-17ipv4: Mark fib_combine_itag()'s 'res' arg as const.David S. Miller1-1/+1
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-02-01ipv4: Update some fib_hash centric interface names.David S. Miller1-3/+3
fib_hash_init() --> fib_trie_init() fib_hash_table() --> fib_trie_table() Signed-off-by: David S. Miller <davem@davemloft.net>
2011-01-31ipv4: Consolidate all default route selection implementations.David S. Miller1-5/+1
Both fib_trie and fib_hash have a local implementation of fib_table_select_default(). This is completely unnecessary code duplication. Since we now remember the fib_table and the head of the fib alias list of the default route, we can implement one single generic version of this routine. Looking at the fib_hash implementation you may get the impression that it's possible for there to be multiple top-level routes in the table for the default route. The truth is, it isn't, the insert code will only allow one entry to exist in the zero prefix hash table, because all keys evaluate to zero and all keys in a hash table must be unique. Signed-off-by: David S. Miller <davem@davemloft.net>
2011-01-31ipv4: Remember FIB alias list head and table in lookup results.David S. Miller1-0/+3
This will be used later to implement fib_select_default() in a completely generic manner, instead of the current situation where the default route is re-looked up in the TRIE/HASH table and then the available aliases are analyzed. Signed-off-by: David S. Miller <davem@davemloft.net>
2011-01-28ipv4: Allocate fib metrics dynamically.David S. Miller1-1/+1
This is the initial gateway towards super-sharing metrics if they are all set to zero for a route. Signed-off-by: David S. Miller <davem@davemloft.net>
2011-01-14netfilter: fix Kconfig dependenciesPatrick McHardy1-3/+3
Fix dependencies of netfilter realm match: it depends on NET_CLS_ROUTE, which itself depends on NET_SCHED; this dependency is missing from netfilter. Since matching on realms is also useful without having NET_SCHED enabled and the option really only controls whether the tclassid member is included in route and dst entries, rename the config option to IP_ROUTE_CLASSID and move it outside of traffic scheduling context to get rid of the NET_SCHED dependeny. Reported-by: Vladis Kletnieks <Valdis.Kletnieks@vt.edu> Signed-off-by: Patrick McHardy <kaber@trash.net>
2010-10-28fib: Fix fib zone and its hash leak on namespace stopPavel Emelyanov1-0/+2
When we stop a namespace we flush the table and free one, but the added fn_zone-s (and their hashes if grown) are leaked. Need to free. Tries releases all its stuff in the flushing code. Shame on us - this bug exists since the very first make-fib-per-net patches in 2.6.27 :( Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-10-05fib: RCU conversion of fib_lookup()Eric Dumazet1-13/+4
fib_lookup() converted to be called in RCU protected context, no reference taken and released on a contended cache line (fib_clntref) fib_table_lookup() and fib_semantic_match() get an additional parameter. struct fib_info gets an rcu_head field, and is freed after an rcu grace period. Stress test : (Sending 160.000.000 UDP frames on same neighbour, IP route cache disabled, dual E5540 @2.53GHz, 32bit kernel, FIB_HASH) (about same results for FIB_TRIE) Before patch : real 1m31.199s user 0m13.761s sys 23m24.780s After patch: real 1m5.375s user 0m14.997s sys 15m50.115s Before patch Profile : 13044.00 15.4% __ip_route_output_key vmlinux 8438.00 10.0% dst_destroy vmlinux 5983.00 7.1% fib_semantic_match vmlinux 5410.00 6.4% fib_rules_lookup vmlinux 4803.00 5.7% neigh_lookup vmlinux 4420.00 5.2% _raw_spin_lock vmlinux 3883.00 4.6% rt_set_nexthop vmlinux 3261.00 3.9% _raw_read_lock vmlinux 2794.00 3.3% fib_table_lookup vmlinux 2374.00 2.8% neigh_resolve_output vmlinux 2153.00 2.5% dst_alloc vmlinux 1502.00 1.8% _raw_read_lock_bh vmlinux 1484.00 1.8% kmem_cache_alloc vmlinux 1407.00 1.7% eth_header vmlinux 1406.00 1.7% ipv4_dst_destroy vmlinux 1298.00 1.5% __copy_from_user_ll vmlinux 1174.00 1.4% dev_queue_xmit vmlinux 1000.00 1.2% ip_output vmlinux After patch Profile : 13712.00 15.8% dst_destroy vmlinux 8548.00 9.9% __ip_route_output_key vmlinux 7017.00 8.1% neigh_lookup vmlinux 4554.00 5.3% fib_semantic_match vmlinux 4067.00 4.7% _raw_read_lock vmlinux 3491.00 4.0% dst_alloc vmlinux 3186.00 3.7% neigh_resolve_output vmlinux 3103.00 3.6% fib_table_lookup vmlinux 2098.00 2.4% _raw_read_lock_bh vmlinux 2081.00 2.4% kmem_cache_alloc vmlinux 2013.00 2.3% _raw_spin_lock vmlinux 1763.00 2.0% __copy_from_user_ll vmlinux 1763.00 2.0% ip_output vmlinux 1761.00 2.0% ipv4_dst_destroy vmlinux 1631.00 1.9% eth_header vmlinux 1440.00 1.7% _raw_read_unlock_bh vmlinux Reference results, if IP route cache is enabled : real 0m29.718s user 0m10.845s sys 7m37.341s 25213.00 29.5% __ip_route_output_key vmlinux 9011.00 10.5% dst_release vmlinux 4817.00 5.6% ip_push_pending_frames vmlinux 4232.00 5.0% ip_finish_output vmlinux 3940.00 4.6% udp_sendmsg vmlinux 3730.00 4.4% __copy_from_user_ll vmlinux 3716.00 4.4% ip_route_output_flow vmlinux 2451.00 2.9% __xfrm_lookup vmlinux 2221.00 2.6% ip_append_data vmlinux 1718.00 2.0% _raw_spin_lock_bh vmlinux 1655.00 1.9% __alloc_skb vmlinux 1572.00 1.8% sock_wfree vmlinux 1345.00 1.6% kfree vmlinux Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-11-06Merge branch 'master' of ↵David S. Miller1-1/+2
master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 Conflicts: drivers/net/usb/cdc_ether.c All CDC ethernet devices of type USB_CLASS_COMM need to use '&mbm_info'. Signed-off-by: David S. Miller <davem@davemloft.net>
2009-10-29net: Fix RPF to work with policy routingjamal1-1/+2
Policy routing is not looked up by mark on reverse path filtering. This fixes it. Signed-off-by: Jamal Hadi Salim <hadi@cyberus.ca> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-10-05ipv4: fib table algorithm performance improvementStephen Hemminger1-11/+14
The FIB algorithim for IPV4 is set at compile time, but kernel goes through the overhead of function call indirection at runtime. Save some cycles by turning the indirect calls to direct calls to either hash or trie code. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-05-03ipv4: remove unused macro (FIB_RES_RESET) from ip_fib.h.Rami Rosen1-2/+0
Signed-off-by: Rami Rosen <ramirose@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-04-27ipv4: remove unused member in fib_table.Rami Rosen1-1/+0
This patch removes an unused parameter (tb_stamp) from fib_table structure in include/net/ip_fib.h. Signed-off-by: Rami Rosen <ramirose@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-02-05[IPV4]: Fix compile error building without CONFIG_FS_PROCLi Zefan1-0/+8
compile error building without CONFIG_FS_PROC: net/ipv4/fib_frontend.c: In function 'fib_net_init': net/ipv4/fib_frontend.c:1032: error: implicit declaration of function 'fib_proc_ init' net/ipv4/fib_frontend.c: In function 'fib_net_exit': net/ipv4/fib_frontend.c:1047: error: implicit declaration of function 'fib_proc_ exit' Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-31[NETNS]: Lookup in FIB semantic hashes taking into account the namespace.Denis V. Lunev1-1/+1
The namespace is not available in the fib_sync_down_addr, add it as a parameter. Looking up a device by the pointer to it is OK. Looking up using a result from fib_trie/fib_hash table lookup is also safe. No need to fix that at all. So, just fix lookup by address and insertion to the hash table path. Signed-off-by: Denis V. Lunev <den@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-31[NETNS]: Add a namespace mark to fib_info.Denis V. Lunev1-0/+1
This is required to make fib_info lookups namespace aware. In the other case initial namespace devices are marked as dead in the local routing table during other namespace stop. Signed-off-by: Denis V. Lunev <den@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-31[IPV4]: fib_sync_down rework.Denis V. Lunev1-1/+2
fib_sync_down can be called with an address and with a device. In reality it is called either with address OR with a device. The codepath inside is completely different, so lets separate it into two calls for these two cases. Signed-off-by: Denis V. Lunev <den@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28[NETNS]: Add netns parameter to fib_select_default.Denis V. Lunev1-1/+2
Currently fib_select_default calls fib_get_table() with the init_net. Prepare it to provide a correct namespace to lookup default route. Signed-off-by: Denis V. Lunev <den@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28[IPV4]: Consolidate fib_select_default.Denis V. Lunev1-9/+1
The difference in the implementation of the fib_select_default when CONFIG_IP_MULTIPLE_TABLES is (not) defined looks negligible. Consolidate it and place into fib_frontend.c. Signed-off-by: Denis V. Lunev <den@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28[IPV4]: Declarations cleanup in ip_fib.h.Denis V. Lunev1-3/+1
Two small issues fixed: - fib_select_multipath is exported from fib_semantics.c rather than from fib_frontend.c. So, move the declaration below appropriate comment. - struct rt_entry declaration is not used. Drop it. Signed-off-by: Denis V. Lunev <den@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28[NETNS]: Add netns parameter to fib_lookup.Denis V. Lunev1-4/+5
Signed-off-by: Denis V. Lunev <den@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28[IPV4]: fib hash|trie initializationStephen Hemminger1-2/+3
Initialization of the slab cache's should be done when IP is initialized to make sure of available memory, and that code can be marked __init. Signed-off-by: Stephen Hemminger <stephen.hemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28[NETNS]: Place fib tables into netns.Denis V. Lunev1-4/+2
The preparatory work has been done. All we need is to substitute fib_table_hash with net->ipv4.fib_table_hash. Netns context is available when required. Acked-by: Benjamin Thery <benjamin.thery@bull.net> Acked-by: Daniel Lezcano <dlezcano@fr.ibm.com> Signed-off-by: Denis V. Lunev <den@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28[NETNS]: Add netns parameter to fib_get_table/fib_new_table.Denis V. Lunev1-8/+8
This patch extends the fib_get_table and the fib_new_table functions with the network namespace pointer. That will allow to access the table relatively from the network namespace. Acked-by: Benjamin Thery <benjamin.thery@bull.net> Acked-by: Daniel Lezcano <dlezcano@fr.ibm.com> Signed-off-by: Denis V. Lunev <den@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28[IPV4]: Unify access to the routing tables.Denis V. Lunev1-11/+28
Replace the direct pointers to local and main tables with calls to fib_get_table() with appropriate argument. This doesn't introduce additional dereferences, but makes the access to fib tables uniform in any (CONFIG_IP_MULTIPLE_TABLES) case. Acked-by: Benjamin Thery <benjamin.thery@bull.net> Acked-by: Daniel Lezcano <dlezcano@fr.ibm.com> Signed-off-by: Denis V. Lunev <den@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28[NETNS]: Refactor fib initialization so it can handle multiple namespaces.Denis V. Lunev1-1/+2
This patch makes the fib to be initialized as a subsystem for the network namespaces. The code does not handle several namespaces yet, so in case of a creation of a network namespace, the creation/initialization will not occur. Acked-by: Benjamin Thery <benjamin.thery@bull.net> Acked-by: Daniel Lezcano <dlezcano@fr.ibm.com> Signed-off-by: Denis V. Lunev <den@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28[IPV4]: Check fib4_rules_init failure.Denis V. Lunev1-1/+1
This adds error paths into both versions of fib4_rules_init (with/without CONFIG_IP_MULTIPLE_TABLES) and returns error code to the caller. Acked-by: Benjamin Thery <benjamin.thery@bull.net> Acked-by: Daniel Lezcano <dlezcano@fr.ibm.com> Signed-off-by: Denis V. Lunev <den@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28[NETNS]: Add namespace to API for routing /proc entries creation.Denis V. Lunev1-2/+2
This adds netns parameter to fib_proc_init/exit and replaces __init specifier with __net_init. After this, we will not yet have these proc files show info from the specific namespace - this will be done when these tables become namespaced. Acked-by: Benjamin Thery <benjamin.thery@bull.net> Acked-by: Daniel Lezcano <dlezcano@fr.ibm.com> Signed-off-by: Denis V. Lunev <den@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28[IPV4]: last default route is a fib table propertyDenis V. Lunev1-0/+1
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>
2008-01-28[IPV4]: Remove ip_fib_local_table and ip_fib_main_table defines.Eric W. Biederman1-3/+0
There are only 2 users and it doesn't hurt to call fib_get_table instead, and it makes it easier to make the fib network namespace aware. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: Denis V. Lunev <den@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-11-07[IPV4]: Compact some ifdefs in the fib code.Pavel Emelyanov1-9/+6
There are places that check for CONFIG_IP_MULTIPLE_TABLES twice in the same file, but the internals of these #ifdefs can be merged. As a side effect - remove one ifdef from inside a function. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-07-10[IPV4]: The scheduled removal of multipath cached routing support.David S. Miller1-16/+0
With help from Chris Wedgwood. Signed-off-by: David S. Miller <davem@davemloft.net>
2007-06-07[NETLINK]: Mark netlink policies constPatrick McHardy1-1/+1
Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-04-25[IPv4]: Use rtnl registration interfaceThomas Graf1-6/+0
Signed-off-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
2006-12-02[IPV4] nl_fib_lookup: Rename fl_fwmark to fl_markThomas Graf1-1/+1
For the sake of consistency. Signed-off-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
2006-10-18[IPv4] fib: Remove unused fib_config membersThomas Graf1-4/+1
Signed-off-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
2006-09-28[IPV4]: net/ipv4/fib annotationsAl Viro1-1/+1
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
2006-09-28[IPV4]: annotate addresses in fib_result and fib_result_nlAl Viro1-3/+3
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
2006-09-28[IPV4]: ip_fib_check_default() annotatedAl Viro1-1/+1
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
2006-09-28[IPV4]: struct fib_config IPv4 address fields annotatedAl Viro1-4/+4
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
2006-09-28[IPV4]: FIB_RES_PREFSRC() annotatedAl Viro1-2/+2
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
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