linux-stable.git/include/net/ip6_fib.h, branch linux-2.6.38.y

ipv6: Add infrastructure to bind inet_peer objects to routes.

2010-11-30T20:27:11+00:00

They are only allowed on cached ipv6 routes.

Signed-off-by: David S. Miller

net-next: remove useless union keyword

2010-06-11T06:31:35+00:00

remove useless union keyword in rtable, rt6_info and dn_route.

Since there is only one member in a union, the union keyword isn't useful.

Signed-off-by: Changli Gao 
Signed-off-by: Eric Dumazet 
Signed-off-by: David S. Miller

ipv6 fib: Make rt6_info{} more cache-line aware.

2010-04-02T01:41:41+00:00

The head element of rt6_info{} is dst_entry{}, and
IPv6 specific elements follow.

Because elements at the end of dst_entry{} are frequently
updated, it is not good to put frequently-used static
elements, such as rt6i_idev, rt6i_dst or rt6i_flags in the
same cache line.

On the other hand, fib6_table, rt6i_node or rt6i_gateway are
rarely used, so it is okay to stay in the same cache line.

Let's rearrange rt6_info{}.

Signed-off-by: YOSHIFUJI Hideaki 
Signed-off-by: David S. Miller

ipv6: use standard lists for FIB walks

2010-02-18T22:30:17+00:00

Signed-off-by: Alexey Dobriyan 
Signed-off-by: David S. Miller

ipv6: fib: fix crash when changing large fib while dumping it

2010-02-12T20:06:35+00:00

When the fib size exceeds what can be dumped in a single skb, the
dump is suspended and resumed once the last skb has been received
by userspace. When the fib is changed while the dump is suspended,
the walker might contain stale pointers, causing a crash when the
dump is resumed.

BUG: unable to handle kernel NULL pointer dereference at 0000000000000018
IP: [] fib6_walk_continue+0xbb/0x124 [ipv6]
PGD 5347a067 PUD 65c7067 PMD 0
Oops: 0000 [#1] PREEMPT SMP
...
RIP: 0010:[]
[] fib6_walk_continue+0xbb/0x124 [ipv6]
...
Call Trace:
 [] ? mutex_spin_on_owner+0x59/0x71
 [] inet6_dump_fib+0x11b/0x1b9 [ipv6]
 [] netlink_dump+0x5b/0x19e
 [] ? consume_skb+0x28/0x2a
 [] netlink_recvmsg+0x1ab/0x2c6
 [] ? netlink_unicast+0xfa/0x151
 [] __sock_recvmsg+0x6d/0x79
 [] sock_recvmsg+0xca/0xe3
 [] ? autoremove_wake_function+0x0/0x38
 [] ? radix_tree_lookup_slot+0xe/0x10
 [] ? find_get_page+0x90/0xa5
 [] ? filemap_fault+0x201/0x34f
 [] ? fget_light+0x2f/0xac
 [] ? verify_iovec+0x4f/0x94
 [] sys_recvmsg+0x14d/0x223

Store the serial number when beginning to walk the fib and reload
pointers when continuing to walk after a change occured. Similar
to other dumping functions, this might cause unrelated entries to
be missed when entries are deleted.

Tested-by: Ben Greear 
Signed-off-by: Patrick McHardy 
Signed-off-by: David S. Miller

net: cleanup include/net

2009-11-04T13:06:25+00:00

This cleanup patch puts struct/union/enum opening braces,
in first line to ease grep games.

struct something
{

becomes :

struct something {

Signed-off-by: Eric Dumazet 
Signed-off-by: David S. Miller

xfrm: select sane defaults for xfrm[4|6] gc_thresh

2009-07-31T01:52:15+00:00

Choose saner defaults for xfrm[4|6] gc_thresh values on init

Currently, the xfrm[4|6] code has hard-coded initial gc_thresh values
(set to 1024).  Given that the ipv4 and ipv6 routing caches are sized
dynamically at boot time, the static selections can be non-sensical.
This patch dynamically selects an appropriate gc threshold based on
the corresponding main routing table size, using the assumption that
we should in the worst case be able to handle as many connections as
the routing table can.

For ipv4, the maximum route cache size is 16 * the number of hash
buckets in the route cache.  Given that xfrm4 starts garbage
collection at the gc_thresh and prevents new allocations at 2 *
gc_thresh, we set gc_thresh to half the maximum route cache size.

For ipv6, its a bit trickier.  there is no maximum route cache size,
but the ipv6 dst_ops gc_thresh is statically set to 1024.  It seems
sane to select a simmilar gc_thresh for the xfrm6 code that is half
the number of hash buckets in the v6 route cache times 16 (like the v4
code does).

Signed-off-by: Neil Horman 
Signed-off-by: David S. Miller

[NETNS][IPV6] rt6_info - move rt6_info structure inside the namespace

2008-03-04T21:48:30+00:00

The rt6_info structures are moved inside the network namespace
structure. All references to these structures are now relative to the
initial network namespace.

Signed-off-by: Daniel Lezcano 
Signed-off-by: Benjamin Thery 
Signed-off-by: David S. Miller

[NETNS][IPV6] ip6_fib - add net to gc timer parameter

2008-03-04T07:28:58+00:00

The fib tables are now relative to the network namespace. When the
garbage collector timer expires, we must have a network namespace
parameter in order to retrieve the tables. For now this is the
init_net, but we should be able to have a timer per namespace and use
the timer callback parameter to pass the network namespace from the
expired timer.

The timer callback, fib6_run_gc, is actually used to be called
synchronously by some functions and asynchronously when the timer
expires.

When the timer expires, the delay specified for fib6_run_gc parameter
is always zero. So, I changed fib6_run_gc to not be a timer callback
but a function called by the timer callback and I added a timer
callback where its work is just to retrieve from the data arg of the
timer the network namespace and call fib6_run_gc with zero expiring
time and the network namespace parameters. That makes the code cleaner
for the fib6_run_gc callers.

Signed-off-by: Daniel Lezcano 
Signed-off-by: Benjamin Thery 
Signed-off-by: David S. Miller

[NETNS][IPV6] ip6_fib - fib6_clean_all handle several network namespaces

2008-03-04T07:27:06+00:00

The function fib6_clean_all takes the network namespace as
parameter. That allows to flush the routes related to a specific
network namespace.

Signed-off-by: Daniel Lezcano 
Signed-off-by: Benjamin Thery 
Signed-off-by: David S. Miller