Commit Graph

462 Commits

Author SHA1 Message Date
David S. Miller
6e03f896b5 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Conflicts:
	drivers/net/vxlan.c
	drivers/vhost/net.c
	include/linux/if_vlan.h
	net/core/dev.c

The net/core/dev.c conflict was the overlap of one commit marking an
existing function static whilst another was adding a new function.

In the include/linux/if_vlan.h case, the type used for a local
variable was changed in 'net', whereas the function got rewritten
to fix a stacked vlan bug in 'net-next'.

In drivers/vhost/net.c, Al Viro's iov_iter conversions in 'net-next'
overlapped with an endainness fix for VHOST 1.0 in 'net'.

In drivers/net/vxlan.c, vxlan_find_vni() added a 'flags' parameter
in 'net-next' whereas in 'net' there was a bug fix to pass in the
correct network namespace pointer in calls to this function.

Signed-off-by: David S. Miller <davem@davemloft.net>
2015-02-05 14:33:28 -08:00
Julian Anastasov
579eb62ac3 ipvs: rerouting to local clients is not needed anymore
commit f5a41847ac ("ipvs: move ip_route_me_harder for ICMP")
from 2.6.37 introduced ip_route_me_harder() call for responses to
local clients, so that we can provide valid rt_src after SNAT.
It was used by TCP to provide valid daddr for ip_send_reply().
After commit 0a5ebb8000 ("ipv4: Pass explicit daddr arg to
ip_send_reply()." from 3.0 this rerouting is not needed anymore
and should be avoided, especially in LOCAL_IN.

Fixes 3.12.33 crash in xfrm reported by Florian Wiessner:
"3.12.33 - BUG xfrm_selector_match+0x25/0x2f6"

Reported-by: Smart Weblications GmbH - Florian Wiessner <f.wiessner@smart-weblications.de>
Tested-by: Smart Weblications GmbH - Florian Wiessner <f.wiessner@smart-weblications.de>
Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
2015-01-30 10:05:55 +09:00
Johannes Berg
053c095a82 netlink: make nlmsg_end() and genlmsg_end() void
Contrary to common expectations for an "int" return, these functions
return only a positive value -- if used correctly they cannot even
return 0 because the message header will necessarily be in the skb.

This makes the very common pattern of

  if (genlmsg_end(...) < 0) { ... }

be a whole bunch of dead code. Many places also simply do

  return nlmsg_end(...);

and the caller is expected to deal with it.

This also commonly (at least for me) causes errors, because it is very
common to write

  if (my_function(...))
    /* error condition */

and if my_function() does "return nlmsg_end()" this is of course wrong.

Additionally, there's not a single place in the kernel that actually
needs the message length returned, and if anyone needs it later then
it'll be very easy to just use skb->len there.

Remove this, and make the functions void. This removes a bunch of dead
code as described above. The patch adds lines because I did

-	return nlmsg_end(...);
+	nlmsg_end(...);
+	return 0;

I could have preserved all the function's return values by returning
skb->len, but instead I've audited all the places calling the affected
functions and found that none cared. A few places actually compared
the return value with <= 0 in dump functionality, but that could just
be changed to < 0 with no change in behaviour, so I opted for the more
efficient version.

One instance of the error I've made numerous times now is also present
in net/phonet/pn_netlink.c in the route_dumpit() function - it didn't
check for <0 or <=0 and thus broke out of the loop every single time.
I've preserved this since it will (I think) have caused the messages to
userspace to be formatted differently with just a single message for
every SKB returned to userspace. It's possible that this isn't needed
for the tools that actually use this, but I don't even know what they
are so couldn't test that changing this behaviour would be acceptable.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-18 01:03:45 -05:00
Dan Carpenter
3b05ac3824 ipvs: uninitialized data with IP_VS_IPV6
The app_tcp_pkt_out() function expects "*diff" to be set and ends up
using uninitialized data if CONFIG_IP_VS_IPV6 is turned on.

The same issue is there in app_tcp_pkt_in().  Thanks to Julian Anastasov
for noticing that.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
2014-12-10 17:36:47 +09:00
Hannes Frederic Sowa
dbfc4fb7d5 dst: no need to take reference on DST_NOCACHE dsts
Since commit f886497212 ("ipv4: fix dst race in sk_dst_get()")
DST_NOCACHE dst_entries get freed by RCU. So there is no need to get a
reference on them when we are in rcu protected sections.

Cc: Eric Dumazet <edumazet@google.com>
Cc: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Reviewed-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-12-09 16:08:17 -05:00
David S. Miller
958d03b016 Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next
Pablo Neira Ayuso says:

====================
netfilter/ipvs updates for net-next

The following patchset contains Netfilter updates for your net-next
tree, this includes the NAT redirection support for nf_tables, the
cgroup support for nft meta and conntrack zone support for the connlimit
match. Coming after those, a bunch of sparse warning fixes, missing
netns bits and cleanups. More specifically, they are:

1) Prepare IPv4 and IPv6 NAT redirect code to use it from nf_tables,
   patches from Arturo Borrero.

2) Introduce the nf_tables redir expression, from Arturo Borrero.

3) Remove an unnecessary assignment in ip_vs_xmit/__ip_vs_get_out_rt().
   Patch from Alex Gartrell.

4) Add nft_log_dereference() macro to the nf_log infrastructure, patch
   from Marcelo Leitner.

5) Add some extra validation when registering logger families, also
   from Marcelo.

6) Some spelling cleanups from stephen hemminger.

7) Fix sparse warning in nf_logger_find_get().

8) Add cgroup support to nf_tables meta, patch from Ana Rey.

9) A Kconfig fix for the new redir expression and fix sparse warnings in
   the new redir expression.

10) Fix several sparse warnings in the netfilter tree, from
    Florian Westphal.

11) Reduce verbosity when OOM in nfnetlink_log. User can basically do
    nothing when this situation occurs.

12) Add conntrack zone support to xt_connlimit, again from Florian.

13) Add netnamespace support to the h323 conntrack helper, contributed
    by Vasily Averin.

14) Remove unnecessary nul-pointer checks before free_percpu() and
    module_put(), from Markus Elfring.

15) Use pr_fmt in nfnetlink_log, again patch from Marcelo Leitner.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-24 16:00:58 -05:00
Markus Elfring
982f405136 netfilter: Deletion of unnecessary checks before two function calls
The functions free_percpu() and module_put() test whether their argument
is NULL and then return immediately. Thus the test around the call is
not needed.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Acked-by: Julian Anastasov <ja@ssi.bg>
Acked-by: Simon Horman <horms@verge.net.au>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2014-11-20 13:08:43 +01:00
Calvin Owens
50656d9df6 ipvs: Keep skb->sk when allocating headroom on tunnel xmit
ip_vs_prepare_tunneled_skb() ignores ->sk when allocating a new
skb, either unconditionally setting ->sk to NULL or allowing
the uninitialized ->sk from a newly allocated skb to leak through
to the caller.

This patch properly copies ->sk and increments its reference count.

Signed-off-by: Calvin Owens <calvinowens@fb.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
2014-11-12 11:03:04 +09:00
Alex Gartrell
d770108911 ipvs: remove unnecessary assignment in __ip_vs_get_out_rt
It is a precondition of the function that daddr be equal to dest->addr.ip
if dest is non-NULL, so this additional assignment is just confusing for
stupid engineers like me.

Signed-off-by: Alex Gartrell <agartrell@fb.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
2014-10-28 09:50:06 +09:00
Alex Gartrell
3d53666b40 ipvs: Avoid null-pointer deref in debug code
Use daddr instead of reaching into dest.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Alex Gartrell <agartrell@fb.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
2014-10-28 09:48:31 +09:00
Rasmus Villemoes
18082746a2 netfilter: replace strnicmp with strncasecmp
The kernel used to contain two functions for length-delimited,
case-insensitive string comparison, strnicmp with correct semantics and
a slightly buggy strncasecmp.  The latter is the POSIX name, so strnicmp
was renamed to strncasecmp, and strnicmp made into a wrapper for the new
strncasecmp to avoid breaking existing users.

To allow the compat wrapper strnicmp to be removed at some point in the
future, and to avoid the extra indirection cost, do
s/strnicmp/strncasecmp/g.

Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-10-14 02:18:24 +02:00
Alex Gartrell
bc18d37f67 ipvs: Allow heterogeneous pools now that we support them
Remove the temporary consistency check and add a case statement to only
allow ipip mixed dests.

Signed-off-by: Alex Gartrell <agartrell@fb.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
2014-09-18 08:59:29 +09:00
Julian Anastasov
f18ae7206e ipvs: use the new dest addr family field
Use the new address family field cp->daf when printing
cp->daddr in logs or connection listing.

Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Alex Gartrell <agartrell@fb.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
2014-09-18 08:59:28 +09:00
Julian Anastasov
4d316f3f9a ipvs: use correct address family in scheduler logs
Needed to support svc->af != dest->af.

Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Alex Gartrell <agartrell@fb.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
2014-09-18 08:59:23 +09:00
Julian Anastasov
cf34e646da ipvs: address family of LBLCR entry depends on svc family
The LBLCR entries should use svc->af, not dest->af.
Needed to support svc->af != dest->af.

Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Alex Gartrell <agartrell@fb.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
2014-09-16 09:03:38 +09:00
Julian Anastasov
f7fa380069 ipvs: address family of LBLC entry depends on svc family
The LBLC entries should use svc->af, not dest->af.
Needed to support svc->af != dest->af.

Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Alex Gartrell <agartrell@fb.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
2014-09-16 09:03:38 +09:00
Alex Gartrell
8052ba2925 ipvs: support ipv4 in ipv6 and ipv6 in ipv4 tunnel forwarding
Pull the common logic for preparing an skb to prepend the header into a
single function and then set fields such that they can be used in either
case (generalize tos and tclass to dscp, hop_limit and ttl to ttl, etc)

Signed-off-by: Alex Gartrell <agartrell@fb.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
2014-09-16 09:03:37 +09:00
Alex Gartrell
c63e4de2be ipvs: Add generic ensure_mtu_is_adequate to handle mixed pools
The out_rt functions check to see if the mtu is large enough for the packet
and, if not, send icmp messages (TOOBIG or DEST_UNREACH) to the source and
bail out.  We needed the ability to send ICMP from the out_rt_v6 function
and DEST_UNREACH from the out_rt function, so we just pulled it out into a
common function.

Signed-off-by: Alex Gartrell <agartrell@fb.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
2014-09-16 09:03:37 +09:00
Alex Gartrell
919aa0b2bb ipvs: Pull out update_pmtu code
Another step toward heterogeneous pools, this removes another piece of
functionality currently specific to each address family type.

Signed-off-by: Alex Gartrell <agartrell@fb.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
2014-09-16 09:03:36 +09:00
Alex Gartrell
4a4739d56b ipvs: Pull out crosses_local_route_boundary logic
This logic is repeated in both out_rt functions so it was redundant.
Additionally, we'll need to be able to do checks to route v4 to v6 and vice
versa in order to deal with heterogeneous pools.

This patch also updates the callsites to add an additional parameter to the
out route functions.

Signed-off-by: Alex Gartrell <agartrell@fb.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
2014-09-16 09:03:36 +09:00
Alex Gartrell
391f503d69 ipvs: prevent mixing heterogeneous pools and synchronization
The synchronization protocol is not compatible with heterogeneous pools, so
we need to verify that we're not turning both on at the same time.

Signed-off-by: Alex Gartrell <agartrell@fb.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
2014-09-16 09:03:35 +09:00
Alex Gartrell
ba38528aae ipvs: Supply destination address family to ip_vs_conn_new
The assumption that dest af is equal to service af is now unreliable, so we
must specify it manually so as not to copy just the first 4 bytes of a v6
address or doing an illegal read of 16 butes on a v6 address.

We "lie" in two places: for synchronization (which we will explicitly
disallow from happening when we have heterogeneous pools) and for black
hole addresses where there's no real dest.

Signed-off-by: Alex Gartrell <agartrell@fb.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
2014-09-16 09:03:34 +09:00
Alex Gartrell
ad147aa4dd ipvs: Pass destination address family to ip_vs_trash_get_dest
Part of a series of diffs to tease out destination family from virtual
family.  This diff just adds a parameter to ip_vs_trash_get and then uses
it for comparison rather than svc->af.

Signed-off-by: Alex Gartrell <agartrell@fb.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
2014-09-16 09:03:34 +09:00
Alex Gartrell
655eef103d ipvs: Supply destination addr family to ip_vs_{lookup_dest,find_dest}
We need to remove the assumption that virtual address family is the same as
real address family in order to support heterogeneous services (that is,
services with v4 vips and v6 backends or the opposite).

Signed-off-by: Alex Gartrell <agartrell@fb.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
2014-09-16 09:03:33 +09:00
Alex Gartrell
6cff339bbd ipvs: Add destination address family to netlink interface
This is necessary to support heterogeneous pools.  For example, if you have
an ipv6 addressed network, you'll want to be able to forward ipv4 traffic
into it.

This patch enforces that destination address family is the same as service
family, as none of the forwarding mechanisms support anything else.

For the old setsockopt mechanism, we simply set the dest address family to
AF_INET as we do with the service.

Signed-off-by: Alex Gartrell <agartrell@fb.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
2014-09-16 09:03:33 +09:00
Kenny Mathis
616a9be25c ipvs: Add simple weighted failover scheduler
Add simple weighted IPVS failover support to the Linux kernel. All
other scheduling modules implement some form of load balancing, while
this offers a simple failover solution. Connections are directed to
the appropriate server based solely on highest weight value and server
availability. Tested functionality with keepalived.

Signed-off-by: Kenny Mathis <kmathis@chokepoint.net>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
2014-09-16 09:03:32 +09:00
David S. Miller
0aac383353 Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next
Pablo Neira Ayuso says:

====================
nf-next pull request

The following patchset contains Netfilter/IPVS updates for your
net-next tree. Regarding nf_tables, most updates focus on consolidating
the NAT infrastructure and adding support for masquerading. More
specifically, they are:

1) use __u8 instead of u_int8_t in arptables header, from
   Mike Frysinger.

2) Add support to match by skb->pkttype to the meta expression, from
   Ana Rey.

3) Add support to match by cpu to the meta expression, also from
   Ana Rey.

4) A smatch warning about IPSET_ATTR_MARKMASK validation, patch from
   Vytas Dauksa.

5) Fix netnet and netportnet hash types the range support for IPv4,
   from Sergey Popovich.

6) Fix missing-field-initializer warnings resolved, from Mark Rustad.

7) Dan Carperter reported possible integer overflows in ipset, from
   Jozsef Kadlecsick.

8) Filter out accounting objects in nfacct by type, so you can
   selectively reset quotas, from Alexey Perevalov.

9) Move specific NAT IPv4 functions to the core so x_tables and
   nf_tables can share the same NAT IPv4 engine.

10) Use the new NAT IPv4 functions from nft_chain_nat_ipv4.

11) Move specific NAT IPv6 functions to the core so x_tables and
    nf_tables can share the same NAT IPv4 engine.

12) Use the new NAT IPv6 functions from nft_chain_nat_ipv6.

13) Refactor code to add nft_delrule(), which can be reused in the
    enhancement of the NFT_MSG_DELTABLE to remove a table and its
    content, from Arturo Borrero.

14) Add a helper function to unregister chain hooks, from
    Arturo Borrero.

15) A cleanup to rename to nft_delrule_by_chain for consistency with
    the new nft_*() functions, also from Arturo.

16) Add support to match devgroup to the meta expression, from Ana Rey.

17) Reduce stack usage for IPVS socket option, from Julian Anastasov.

18) Remove unnecessary textsearch state initialization in xt_string,
    from Bojan Prtvar.

19) Add several helper functions to nf_tables, more work to prepare
    the enhancement of NFT_MSG_DELTABLE, again from Arturo Borrero.

20) Enhance NFT_MSG_DELTABLE to delete a table and its content, from
    Arturo Borrero.

21) Support NAT flags in the nat expression to indicate the flavour,
    eg. random fully, from Arturo.

22) Add missing audit code to ebtables when replacing tables, from
    Nicolas Dichtel.

23) Generalize the IPv4 masquerading code to allow its re-use from
    nf_tables, from Arturo.

24) Generalize the IPv6 masquerading code, also from Arturo.

25) Add the new masq expression to support IPv4/IPv6 masquerading
    from nf_tables, also from Arturo.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-10 12:46:32 -07:00
Julian Anastasov
5fcf0cf607 ipvs: reduce stack usage for sockopt data
Use union to reserve the required stack space for sockopt data
which is less than the currently hardcoded value of 128.
Now the tables for commands should be more readable.
The checks added for readability are optimized by compiler,
others warn at compile time if command uses too much
stack or exceeds the storage of set_arglen and get_arglen.

As Dan Carpenter points out, we can run for unprivileged user,
so we can silent some error messages.

Signed-off-by: Julian Anastasov <ja@ssi.bg>
CC: Dan Carpenter <dan.carpenter@oracle.com>
CC: Andrey Utkin <andrey.krieger.utkin@gmail.com>
CC: David Binderman <dcb314@hotmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2014-09-09 16:31:24 +02:00
Julian Anastasov
eb90b0c734 ipvs: fix ipv6 hook registration for local replies
commit fc60476761
("ipvs: changes for local real server") from 2.6.37
introduced DNAT support to local real server but the
IPv6 LOCAL_OUT handler ip_vs_local_reply6() is
registered incorrectly as IPv4 hook causing any outgoing
IPv4 traffic to be dropped depending on the IP header values.

Chris tracked down the problem to CONFIG_IP_VS_IPV6=y
Bug report: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1349768

Reported-by: Chris J Arges <chris.j.arges@canonical.com>
Tested-by: Chris J Arges <chris.j.arges@canonical.com>
Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
2014-08-28 10:52:37 +09:00
Julian Anastasov
ea1d5d7755 ipvs: properly declare tunnel encapsulation
The tunneling method should properly use tunnel encapsulation.
Fixes problem with CHECKSUM_PARTIAL packets when TCP/UDP csum
offload is supported.

Thanks to Alex Gartrell for reporting the problem, providing
solution and for all suggestions.

Reported-by: Alex Gartrell <agartrell@fb.com>
Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Alex Gartrell <agartrell@fb.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
2014-08-27 14:31:56 +09:00
Pablo Neira Ayuso
7926dbfa4b netfilter: don't use mutex_lock_interruptible()
Eric Dumazet reports that getsockopt() or setsockopt() sometimes
returns -EINTR instead of -ENOPROTOOPT, causing headaches to
application developers.

This patch replaces all the mutex_lock_interruptible() by mutex_lock()
in the netfilter tree, as there is no reason we should sleep for a
long time there.

Reported-by: Eric Dumazet <edumazet@google.com>
Suggested-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Acked-by: Julian Anastasov <ja@ssi.bg>
2014-08-08 16:47:23 +02:00
David S. Miller
d247b6ab3c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Conflicts:
	drivers/net/Makefile
	net/ipv6/sysctl_net_ipv6.c

Two ipv6_table_template[] additions overlap, so the index
of the ipv6_table[x] assignments needed to be adjusted.

In the drivers/net/Makefile case, we've gotten rid of the
garbage whereby we had to list every single USB networking
driver in the top-level Makefile, there is just one
"USB_NETWORKING" that guards everything.

Signed-off-by: David S. Miller <davem@davemloft.net>
2014-08-05 18:46:26 -07:00
David S. Miller
f139c74a8d Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-07-30 13:25:49 -07:00
David S. Miller
a8138f42d4 Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next
Pablo Neira Ayuso says:

====================
Netfilter updates for net-next

The following patchset contains updates for your net-next tree,
they are:

1) Use kvfree() helper function from x_tables, from Eric Dumazet.

2) Remove extra timer from the conntrack ecache extension, use a
   workqueue instead to redeliver lost events to userspace instead,
   from Florian Westphal.

3) Removal of the ulog targets for ebtables and iptables. The nflog
   infrastructure superseded this almost 9 years ago, time to get rid
   of this code.

4) Replace the list of loggers by an array now that we can only have
   two possible non-overlapping logger flavours, ie. kernel ring buffer
   and netlink logging.

5) Move Eric Dumazet's log buffer code to nf_log to reuse it from
   all of the supported per-family loggers.

6) Consolidate nf_log_packet() as an unified interface for packet logging.
   After this patch, if the struct nf_loginfo is available, it explicitly
   selects the logger that is used.

7) Move ip and ip6 logging code from xt_LOG to the corresponding
   per-family loggers. Thus, x_tables and nf_tables share the same code
   for packet logging.

8) Add generic ARP packet logger, which is used by nf_tables. The
   format aims to be consistent with the output of xt_LOG.

9) Add generic bridge packet logger. Again, this is used by nf_tables
   and it routes the packets to the real family loggers. As a result,
   we get consistent logging format for the bridge family. The ebt_log
   logging code has been intentionally left in place not to break
   backward compatibility since the logging output differs from xt_LOG.

10) Update nft_log to explicitly request the required family logger when
    needed.

11) Finish nft_log so it supports arp, ip, ip6, bridge and inet families.
    Allowing selection between netlink and kernel buffer ring logging.

12) Several fixes coming after the netfilter core logging changes spotted
    by robots.

13) Use IS_ENABLED() macros whenever possible in the netfilter tree,
    from Duan Jiong.

14) Removal of a couple of unnecessary branch before kfree, from Fabian
    Frederick.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2014-07-20 21:01:43 -07:00
Alex Gartrell
76f084bc10 ipvs: Maintain all DSCP and ECN bits for ipv6 tun forwarding
Previously, only the four high bits of the tclass were maintained in the
ipv6 case.  This matches the behavior of ipv4, though whether or not we
should reflect ECN bits may be up for debate.

Signed-off-by: Alex Gartrell <agartrell@fb.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
2014-07-17 12:53:54 +09:00
Yannick Brosseau
16ea4c6b9d ipvs: Remove dead debug code
This code section cannot compile as it refer to non existing variable
It also pre-date git history.

Signed-off-by: Yannick Brosseau <scientist@fb.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
2014-07-16 10:07:11 +09:00
Fabian Frederick
b734427a4f ipvs: remove null test before kfree
Fix checkpatch warning:
WARNING: kfree(NULL) is safe this check is probably not required

Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Simon Horman <horms@verge.net.au>
2014-07-16 10:07:01 +09:00
Julian Anastasov
2627b7e15c ipvs: avoid netns exit crash on ip_vs_conn_drop_conntrack
commit 8f4e0a1868 ("IPVS netns exit causes crash in conntrack")
added second ip_vs_conn_drop_conntrack call instead of just adding
the needed check. As result, the first call still can cause
crash on netns exit. Remove it.

Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Hans Schillstrom <hans@schillstrom.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
2014-07-16 09:39:28 +09:00
Pablo Neira Ayuso
98ca74f4d5 Merge branch 'ipvs'
Simon Horman says:

====================
Fix for panic due use of tot_stats estimator outside of CONFIG_SYSCTL

It has been present since v3.6.39.
====================

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2014-06-16 13:22:33 +02:00
Julian Anastasov
9802d21e7a ipvs: stop tot_stats estimator only under CONFIG_SYSCTL
The tot_stats estimator is started only when CONFIG_SYSCTL
is defined. But it is stopped without checking CONFIG_SYSCTL.
Fix the crash by moving ip_vs_stop_estimator into
ip_vs_control_net_cleanup_sysctl.

The change is needed after commit 14e405461e
("IPVS: Add __ip_vs_control_{init,cleanup}_sysctl()") from 2.6.39.

Reported-by: Jet Chen <jet.chen@intel.com>
Tested-by: Jet Chen <jet.chen@intel.com>
Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
2014-06-13 16:22:25 +09:00
David S. Miller
c99f7abf0e Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Conflicts:
	include/net/inetpeer.h
	net/ipv6/output_core.c

Changes in net were fixing bugs in code removed in net-next.

Signed-off-by: David S. Miller <davem@davemloft.net>
2014-06-03 23:32:12 -07:00
Eric Dumazet
73f156a6e8 inetpeer: get rid of ip_id_count
Ideally, we would need to generate IP ID using a per destination IP
generator.

linux kernels used inet_peer cache for this purpose, but this had a huge
cost on servers disabling MTU discovery.

1) each inet_peer struct consumes 192 bytes

2) inetpeer cache uses a binary tree of inet_peer structs,
   with a nominal size of ~66000 elements under load.

3) lookups in this tree are hitting a lot of cache lines, as tree depth
   is about 20.

4) If server deals with many tcp flows, we have a high probability of
   not finding the inet_peer, allocating a fresh one, inserting it in
   the tree with same initial ip_id_count, (cf secure_ip_id())

5) We garbage collect inet_peer aggressively.

IP ID generation do not have to be 'perfect'

Goal is trying to avoid duplicates in a short period of time,
so that reassembly units have a chance to complete reassembly of
fragments belonging to one message before receiving other fragments
with a recycled ID.

We simply use an array of generators, and a Jenkin hash using the dst IP
as a key.

ipv6_select_ident() is put back into net/ipv6/ip6_output.c where it
belongs (it is only used from this file)

secure_ip_id() and secure_ipv6_id() no longer are needed.

Rename ip_select_ident_more() to ip_select_ident_segs() to avoid
unnecessary decrement/increment of the number of segments.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-06-02 11:00:41 -07:00
David S. Miller
90d0e08e57 Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next
Pablo Neira Ayuso says:

====================
Netfilter/IPVS updates for net-next

This small patchset contains three accumulated Netfilter/IPVS updates,
they are:

1) Refactorize common NAT code by encapsulating it into a helper
   function, similarly to what we do in other conntrack extensions,
   from Florian Westphal.

2) A minor format string mismatch fix for IPVS, from Masanari Iida.

3) Add quota support to the netfilter accounting infrastructure, now
   you can add quotas to accounting objects via the nfnetlink interface
   and use them from iptables. You can also listen to quota
   notifications from userspace. This enhancement from Mathieu Poirier.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2014-05-30 17:54:47 -07:00
Peter Christensen
f44a5f45f5 ipvs: Fix panic due to non-linear skb
Receiving a ICMP response to an IPIP packet in a non-linear skb could
cause a kernel panic in __skb_pull.

The problem was introduced in
commit f2edb9f770 ("ipvs: implement
passive PMTUD for IPIP packets").

Signed-off-by: Peter Christensen <pch@ordbogen.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
2014-05-26 10:22:46 +09:00
WANG Cong
60ff746739 net: rename local_df to ignore_df
As suggested by several people, rename local_df to ignore_df,
since it means "ignore df bit if it is set".

Cc: Maciej Żenczykowski <maze@google.com>
Cc: Florian Westphal <fw@strlen.de>
Cc: David S. Miller <davem@davemloft.net>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Acked-by: Maciej Żenczykowski <maze@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-05-12 14:03:41 -04:00
Masanari Iida
1404c3ab98 netfilter: Fix format string mismatch in ip_vs_proto_name()
Fix string mismatch in ip_vs_proto_name()

Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2014-04-23 14:14:14 +02:00
David S. Miller
e86e180b82 Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next
Pablo Neira Ayuso says:

====================
Netfilter/IPVS updates for net-next

The following patchset contains Netfilter/IPVS updates for net-next,
most relevantly they are:

* cleanup to remove double semicolon from stephen hemminger.

* calm down sparse warning in xt_ipcomp, from Fan Du.

* nf_ct_labels support for nf_tables, from Florian Westphal.

* new macros to simplify rcu dereferences in the scope of nfnetlink
  and nf_tables, from Patrick McHardy.

* Accept queue and drop (including reason for drop) to verdict
  parsing in nf_tables, also from Patrick.

* Remove unused random seed initialization in nfnetlink_log, from
  Florian Westphal.

* Allow to attach user-specific information to nf_tables rules, useful
  to attach user comments to rule, from me.

* Return errors in ipset according to the manpage documentation, from
  Jozsef Kadlecsik.

* Fix coccinelle warnings related to incorrect bool type usage for ipset,
  from Fengguang Wu.

* Add hash:ip,mark set type to ipset, from Vytas Dauksa.

* Fix message for each spotted by ipset for each netns that is created,
  from Ilia Mirkin.

* Add forceadd option to ipset, which evicts a random entry from the set
  if it becomes full, from Josh Hunt.

* Minor IPVS cleanups and fixes from Andi Kleen and Tingwei Liu.

* Improve conntrack scalability by removing a central spinlock, original
  work from Eric Dumazet. Jesper Dangaard Brouer took them over to address
  remaining issues. Several patches to prepare this change come in first
  place.

* Rework nft_hash to resolve bugs (leaking chain, missing rcu synchronization
  on element removal, etc. from Patrick McHardy.

* Restore context in the rule deletion path, as we now release rule objects
  synchronously, from Patrick McHardy. This gets back event notification for
  anonymous sets.

* Fix NAT family validation in nft_nat, also from Patrick.

* Improve scalability of xt_connlimit by using an array of spinlocks and
  by introducing a rb-tree of hashtables for faster lookup of accounted
  objects per network. This patch was preceded by several patches and
  refactorizations to accomodate this change including the use of kmem_cache,
  from Florian Westphal.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-17 15:06:24 -04:00
Eric W. Biederman
57a7744e09 net: Replace u64_stats_fetch_begin_bh to u64_stats_fetch_begin_irq
Replace the bh safe variant with the hard irq safe variant.

We need a hard irq safe variant to deal with netpoll transmitting
packets from hard irq context, and we need it in most if not all of
the places using the bh safe variant.

Except on 32bit uni-processor the code is exactly the same so don't
bother with a bh variant, just have a hard irq safe variant that
everyone can use.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-14 22:41:36 -04:00
Tingwei Liu
411fd527bc ipvs: Reduce checkpatch noise in ip_vs_lblc.c
Add whitespace after operator and put open brace { on the previous line

Cc: Tingwei Liu <liutingwei@hisense.com>
Cc: lvs-devel@vger.kernel.org
Signed-off-by: Tingwei Liu <tingw.liu@gmail.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
2014-03-07 12:36:21 +09:00
Andi Kleen
c61b0c1328 sections, ipvs: Remove useless __read_mostly for ipvs genl_ops
const __read_mostly does not make any sense, because const
data is already read-only. Remove the __read_mostly
for the ipvs genl_ops. This avoids a LTO
section conflict compile problem.

Cc: Wensong Zhang <wensong@linux-vs.org>
Cc: Simon Horman <horms@verge.net.au>
Cc: Patrick McHardy <kaber@trash.net>
Cc: lvs-devel@vger.kernel.org
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
2014-03-07 12:36:21 +09:00