The neighbour entry will be destroyed in the case of error, so it is
pointless to perform constly routing table lookup in this case.
Signed-off-by: NDenis V. Lunev <den@openvz.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

To do so, just register the proper subsystem and create files in
->init callbacks.

No other special per-namespace handling for raw sockets is required.
Signed-off-by: NPavel Emelyanov <xemul@openvz.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Happily, in all the rest places (->bind callbacks only), that require the
struct net, we have a socket, so get the net from it.
Signed-off-by: NPavel Emelyanov <xemul@openvz.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Pull the struct net pointer up to the showing functions
to filter the sockets depending on their namespaces.
Signed-off-by: NPavel Emelyanov <xemul@openvz.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This requires just to pass the appropriate struct net pointer
into __raw_v[46]_lookup and skip sockets that do not belong
to a needed namespace.

The proper net is get from skb->dev in all the cases.
Signed-off-by: NPavel Emelyanov <xemul@openvz.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

If declared as unsigned short, these fields can overflow, and whole
trie logic is broken. I could not make the machine crash, but some
tnode can never be freed.

Note for 64 bit arches : By reordering t_key and parent in [node,
leaf, tnode] structures, we can use 32 bits hole after t_key so that
sizeof(struct tnode) doesnt change after this patch.
Signed-off-by: NEric Dumazet <dada1@cosmosbay.com>
Signed-off-by: NRobert Olsson <robert.olsson@its.uu.se>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/ax25/ax25_route.c:251:13: warning: context imbalance in
'ax25_rt_seq_start' - wrong count at exit
net/ax25/ax25_route.c:276:13: warning: context imbalance in 'ax25_rt_seq_stop'
- unexpected unlock
net/ax25/ax25_std_timer.c:65:25: warning: expensive signed divide
net/ax25/ax25_uid.c:46:1: warning: symbol 'ax25_uid_list' was not declared.
Should it be static?
net/ax25/ax25_uid.c:146:13: warning: context imbalance in 'ax25_uid_seq_start'
- wrong count at exit
net/ax25/ax25_uid.c:169:13: warning: context imbalance in 'ax25_uid_seq_stop'
- unexpected unlock
net/ax25/af_ax25.c:573:28: warning: expensive signed divide
net/ax25/af_ax25.c:1865:13: warning: context imbalance in 'ax25_info_start' -
wrong count at exit
net/ax25/af_ax25.c:1888:13: warning: context imbalance in 'ax25_info_stop' -
unexpected unlock
net/ax25/ax25_ds_timer.c:133:25: warning: expensive signed divide
Signed-off-by: NEric Dumazet <dada1@cosmosbay.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

   CHECK   net/x25/af_x25.c
net/x25/af_x25.c:117:46: warning: expensive signed divide
   CHECK   net/x25/x25_facilities.c
net/x25/x25_facilities.c:209:30: warning: expensive signed divide
   CHECK   net/x25/x25_in.c
net/x25/x25_in.c:250:26: warning: expensive signed divide
   CHECK   net/x25/x25_proc.c
net/x25/x25_proc.c:48:11: warning: context imbalance in 'x25_seq_route_start'
- wrong count at exit
net/x25/x25_proc.c:72:13: warning: context imbalance in 'x25_seq_route_stop' -
unexpected unlock
net/x25/x25_proc.c:112:11: warning: context imbalance in
'x25_seq_socket_start' - wrong count at exit
net/x25/x25_proc.c:129:13: warning: context imbalance in 'x25_seq_socket_stop'
- unexpected unlock
net/x25/x25_proc.c:190:11: warning: context imbalance in
'x25_seq_forward_start' - wrong count at exit
net/x25/x25_proc.c:215:13: warning: context imbalance in
'x25_seq_forward_stop' - unexpected unlock
   CHECK   net/x25/x25_subr.c
net/x25/x25_subr.c:362:57: warning: expensive signed divide
Signed-off-by: NEric Dumazet <dada1@cosmosbay.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

tnode_alloc() already clears allocated memory, using kcalloc() or
alloc_pages(GFP_KERNEL|__GFP_ZERO, ...)
Signed-off-by: NEric Dumazet <dada1@cosmosbay.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Realign struct members.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

alg_key_len is currently defined as 'signed int'. This unfortunatly
leads to integer divides in several paths.

Converting it to unsigned is safe and saves 208 bytes of text on i386.
Signed-off-by: NEric Dumazet <dada1@cosmosbay.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Signed-off-by: NIlpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Signed-off-by: NIlpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

In struct tnode, we use two fields of 5 bits for 'pos' and 'bits'.
Switching to plain 'unsigned char' (8 bits) take the same space
because of compiler alignments, and reduce text size by 435 bytes
on i386.

On i386 :
$ size net/ipv4/fib_trie.o.before_patch net/ipv4/fib_trie.o
    text    data     bss     dec     hex filename
   13714       4      64   13782    35d6 net/ipv4/fib_trie.o.before
   13279       4      64   13347    3423 net/ipv4/fib_trie.o
Signed-off-by: NEric Dumazet <dada1@cosmosbay.com>
Acked-by: NStephen Hemminger <stephen.hemminger@vyatta.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/netfilter/xt_policy.c:
  policy_mt | -906
 1 function changed, 906 bytes removed, diff: -906

net/netfilter/xt_policy.c:
  match_xfrm_state | +427
 1 function changed, 427 bytes added, diff: +427

net/netfilter/xt_policy.o:
 2 functions changed, 427 bytes added, 906 bytes removed, diff: -479

Alternatively, this could be done by combining identical
parts of the match_policy_in/out()
Signed-off-by: NIlpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Make FIB TRIE go through sparse checker without warnings.
Signed-off-by: NStephen Hemminger <stephen.hemminger@vyatta.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The FIB TRIE code has a bunch of statistics, but the code is hidden
behind an ifdef that was never implemented. Since it was dead code, it
was broken as well.

This patch fixes that by making it a config option.
Signed-off-by: NStephen Hemminger <stephen.hemminger@vyatta.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

printk related cleanups:
 * Get rid of unused printk wrappers.
 * Make bug checks into KERN_WARNING because KERN_DEBUG gets ignored
 * Turn one cryptic old message into something real
 * Make sure all messages have KERN_XXX
Signed-off-by: NStephen Hemminger <stephen.hemminger@vyatta.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The only error from fib_insert_node is if memory allocation fails, so
instead of passing by reference, just use the convention of returning
NULL.
Signed-off-by: NStephen Hemminger <stephen.hemminger@vyatta.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Use %u instead of %d when printing unsigned values.
Signed-off-by: NStephen Hemminger <stephen.hemminger@vyatta.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The revision element must of been part of an earlier design, because
currently it is set but never used.
Signed-off-by: NStephen Hemminger <stephen.hemminger@vyatta.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

trie_init is worthless it is just zeroing stuff that is already zero!
Move the memset() down to make it obvious.
Signed-off-by: NStephen Hemminger <stephen.hemminger@vyatta.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/core/pktgen.c:
  pktgen_stop_device   |  -50
  pktgen_run           | -105
  pktgen_if_show       |  -37
  pktgen_thread_worker | -702
 4 functions changed, 894 bytes removed, diff: -894

net/core/pktgen.c:
  getCurUs |  +36
 1 function changed, 36 bytes added, diff: +36

net/core/pktgen.o:
 5 functions changed, 36 bytes added, 894 bytes removed, diff: -858
Signed-off-by: NIlpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Signed-off-by: NIlpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/netlink/af_netlink.c:
  netlink_realloc_groups        |  -46
  netlink_insert                |  -49
  netlink_autobind              |  -94
  netlink_clear_multicast_users |  -48
  netlink_bind                  |  -55
  netlink_setsockopt            |  -54
  netlink_release               |  -86
  netlink_kernel_create         |  -47
  netlink_change_ngroups        |  -56
 9 functions changed, 535 bytes removed, diff: -535

net/netlink/af_netlink.c:
  netlink_table_ungrab |  +53
 1 function changed, 53 bytes added, diff: +53

net/netlink/af_netlink.o:
 10 functions changed, 53 bytes added, 535 bytes removed, diff: -482
Signed-off-by: NIlpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/ipv6/route.c:
  ip6_pkt_prohibit_out | -130
  ip6_pkt_discard      | -261
  ip6_pkt_discard_out  | -130
  ip6_pkt_prohibit     | -261
 4 functions changed, 782 bytes removed, diff: -782

net/ipv6/route.c:
  ip6_pkt_drop | +300
 1 function changed, 300 bytes added, diff: +300

net/ipv6/route.o:
 5 functions changed, 300 bytes added, 782 bytes removed, diff: -482
Signed-off-by: NIlpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/xfrm/xfrm_policy.c:
  xfrm_audit_policy_delete | -692
  xfrm_audit_policy_add    | -692
 2 functions changed, 1384 bytes removed, diff: -1384

net/xfrm/xfrm_policy.c:
  xfrm_audit_common_policyinfo | +704
 1 function changed, 704 bytes added, diff: +704

net/xfrm/xfrm_policy.o:
 3 functions changed, 704 bytes added, 1384 bytes removed, diff: -680
Signed-off-by: NIlpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/ipv4/tcp_cong.c:
  tcp_reno_cong_avoid |  -65
 1 function changed, 65 bytes removed, diff: -65

net/ipv4/arp.c:
  arp_ignore |   -5
 1 function changed, 5 bytes removed, diff: -5

net/ipv4/tcp_bic.c:
  bictcp_cong_avoid |  -57
 1 function changed, 57 bytes removed, diff: -57

net/ipv4/tcp_cubic.c:
  bictcp_cong_avoid |  -61
 1 function changed, 61 bytes removed, diff: -61

net/ipv4/tcp_highspeed.c:
  hstcp_cong_avoid |  -63
 1 function changed, 63 bytes removed, diff: -63

net/ipv4/tcp_hybla.c:
  hybla_cong_avoid |  -85
 1 function changed, 85 bytes removed, diff: -85

net/ipv4/tcp_htcp.c:
  htcp_cong_avoid |  -57
 1 function changed, 57 bytes removed, diff: -57

net/ipv4/tcp_veno.c:
  tcp_veno_cong_avoid |  -52
 1 function changed, 52 bytes removed, diff: -52

net/ipv4/tcp_scalable.c:
  tcp_scalable_cong_avoid |  -61
 1 function changed, 61 bytes removed, diff: -61

net/ipv4/tcp_yeah.c:
  tcp_yeah_cong_avoid |  -75
 1 function changed, 75 bytes removed, diff: -75

net/ipv4/tcp_illinois.c:
  tcp_illinois_cong_avoid |  -54
 1 function changed, 54 bytes removed, diff: -54

net/dccp/ccids/ccid3.c:
  ccid3_update_send_interval |   -7
  ccid3_hc_tx_packet_recv    |   +7
 2 functions changed, 7 bytes added, 7 bytes removed, diff: +0

net/ipv4/tcp_cong.c:
  tcp_is_cwnd_limited |  +88
 1 function changed, 88 bytes added, diff: +88

built-in.o:
 14 functions changed, 95 bytes added, 642 bytes removed, diff: -547

...Again some gcc artifacts visible as well.
Signed-off-by: NIlpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/ipv4/tcp.c:
  tcp_close_state | -226
  tcp_done        | -145
  tcp_close       | -564
  tcp_disconnect  | -141
 4 functions changed, 1076 bytes removed, diff: -1076

net/ipv4/tcp_input.c:
  tcp_fin               |  -86
  tcp_rcv_state_process | -164
 2 functions changed, 250 bytes removed, diff: -250

net/ipv4/tcp_ipv4.c:
  tcp_v4_connect | -209
 1 function changed, 209 bytes removed, diff: -209

net/ipv4/arp.c:
  arp_ignore |   +5
 1 function changed, 5 bytes added, diff: +5

net/ipv6/tcp_ipv6.c:
  tcp_v6_connect | -158
 1 function changed, 158 bytes removed, diff: -158

net/sunrpc/xprtsock.c:
  xs_sendpages |   -2
 1 function changed, 2 bytes removed, diff: -2

net/dccp/ccids/ccid3.c:
  ccid3_update_send_interval |   +7
 1 function changed, 7 bytes added, diff: +7

net/ipv4/tcp.c:
  tcp_set_state | +238
 1 function changed, 238 bytes added, diff: +238

built-in.o:
 12 functions changed, 250 bytes added, 1695 bytes removed, diff: -1445

I've no explanation why some unrelated changes seem to occur
consistently as well (arp_ignore, ccid3_update_send_interval;
I checked the arp_ignore asm and it seems to be due to some
reordered of operation order causing some extra opcodes to be
generated). Still, the benefits are pretty obvious from the
codiff's results.
Signed-off-by: NIlpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Looks if the address is belonging to the network namespace, otherwise
discard the address for the check.
Signed-off-by: NDaniel Lezcano <dlezcano@fr.ibm.com>
Signed-off-by: NBenjamin Thery <benjamin.thery@bull.net>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The inet6_addr_lst is browsed taking into account the network
namespace specified as parameter. If an address does not belong
to the specified namespace, it is ignored.
Signed-off-by: NDaniel Lezcano <dlezcano@fr.ibm.com>
Signed-off-by: NBenjamin Thery <benjamin.thery@bull.net>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This patch makes ipv6_chk_same_addr function to be aware of the
network namespace. The addresses not belonging to the network
namespace are discarded.
Signed-off-by: NDaniel Lezcano <dlezcano@fr.ibm.com>
Signed-off-by: NBenjamin Thery <benjamin.thery@bull.net>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

When a new address is added, we must check if the new address does not
already exists.  This patch makes this check to be aware of a network
namespace, so the check will look if the address already exists for
the specified network namespace. While the addresses are browsed, the
addresses which do not belong to the namespace are discarded.
Signed-off-by: NDaniel Lezcano <dlezcano@fr.ibm.com>
Signed-off-by: NBenjamin Thery <benjamin.thery@bull.net>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Make /proc/net/if_inet6 show only inet6 addresses belonging to the
namespace.
Signed-off-by: NDaniel Lezcano <dlezcano@fr.ibm.com>
Signed-off-by: NBenjamin Thery <benjamin.thery@bull.net>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

When I studied the neighbor code I puzzled over what the NUD can mean
for quite a long time.

Finally I asked Alexey and he said that this was smth like "neighbor
unreachability detection".
Signed-off-by: NPavel Emelyanov <xemul@openvz.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Otherwise we beat heavily on the global tcp_memory atomics
when all of the sockets in the system are slowly sending
perioding packet clumps.

Noticed and suggested by Eric Dumazet.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Actually the net->ipv6.devconf_all can be used in a few places,
but to keep the /proc/sys/net/ipv6/conf/ sysctls work consistently
in the namespace we should use the per-net devconf_all in the
sysctl "forwarding" handler.
Signed-off-by: NPavel Emelyanov <xemul@openvz.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

All its users are in net/ipv6/addrconf.c's sysctl handlers.
Since they already have the struct net to get from, the
per-net ipv6_devconf_dflt can already be used.
Signed-off-by: NPavel Emelyanov <xemul@openvz.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This is the core. Declare and register the pernet subsys for
addrconf. The init callback the will create the devconf-s.

The init_net will reuse the existing statically declared confs,
so that accessing them from inside the ipv6 code will still
work.

The register_pernet_subsys() is moved above the ipv6_add_dev()
call for loopback, because this function will need the
net->devconf_dflt pointer to be already set.
Signed-off-by: NPavel Emelyanov <xemul@openvz.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>