Commit Graph

110 Commits

Author SHA1 Message Date
Alexey Dobriyan 180211b841 af_key: fix netns ops ordering on module load/unload
1. After sock_register() returns, it's possible to create sockets,
   even if module still not initialized fully (blame generic module code
   for that!)
2. Consequently, pfkey_create() can be called with pfkey_net_id still not
   initialized which will BUG_ON in net_generic():
	kernel BUG at include/net/netns/generic.h:43!
3. During netns shutdown, netns ops should be unregistered after
   key manager unregistered because key manager calls can be triggered
   from xfrm_user module:

   	general protection fault: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC
	pfkey_broadcast+0x111/0x210 [af_key]
	pfkey_send_notify+0x16a/0x300 [af_key]
	km_state_notify+0x41/0x70
	xfrm_flush_sa+0x75/0x90 [xfrm_user]
4. Unregister netns ops after socket ops just in case and for symmetry.

Reported by Luca Tettamanti.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Tested-by: Luca Tettamanti <kronos.it@gmail.com>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-02-03 18:11:11 -08:00
Martin Willi c20a66f474 xfrm: Fix truncation length of authentication algorithms installed via PF_KEY
Commit 4447bb33f0 ("xfrm: Store aalg in
xfrm_state with a user specified truncation length") breaks
installation of authentication algorithms via PF_KEY, as the state
specific truncation length is not installed with the algorithms
default truncation length.  This patch initializes state properly to
the default if installed via PF_KEY.

Signed-off-by: Martin Willi <martin@strongswan.org>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-12-11 15:07:57 -08:00
Eric W. Biederman 23c049ca92 net: Simplify af_key pernet operations.
Take advantage of the new pernet automatic storage management,
and stop using compatibility network namespace functions.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-12-01 16:15:54 -08:00
Eric Dumazet f99189b186 netns: net_identifiers should be read_mostly
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-11-18 05:03:25 -08:00
Eric Paris 3f378b6844 net: pass kern to net_proto_family create function
The generic __sock_create function has a kern argument which allows the
security system to make decisions based on if a socket is being created by
the kernel or by userspace.  This patch passes that flag to the
net_proto_family specific create function, so it can do the same thing.

Signed-off-by: Eric Paris <eparis@redhat.com>
Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-11-05 22:18:14 -08:00
Neil Horman 3b885787ea net: Generalize socket rx gap / receive queue overflow cmsg
Create a new socket level option to report number of queue overflows

Recently I augmented the AF_PACKET protocol to report the number of frames lost
on the socket receive queue between any two enqueued frames.  This value was
exported via a SOL_PACKET level cmsg.  AFter I completed that work it was
requested that this feature be generalized so that any datagram oriented socket
could make use of this option.  As such I've created this patch, It creates a
new SOL_SOCKET level option called SO_RXQ_OVFL, which when enabled exports a
SOL_SOCKET level cmsg that reports the nubmer of times the sk_receive_queue
overflowed between any two given frames.  It also augments the AF_PACKET
protocol to take advantage of this new feature (as it previously did not touch
sk->sk_drops, which this patch uses to record the overflow count).  Tested
successfully by me.

Notes:

1) Unlike my previous patch, this patch simply records the sk_drops value, which
is not a number of drops between packets, but rather a total number of drops.
Deltas must be computed in user space.

2) While this patch currently works with datagram oriented protocols, it will
also be accepted by non-datagram oriented protocols. I'm not sure if thats
agreeable to everyone, but my argument in favor of doing so is that, for those
protocols which aren't applicable to this option, sk_drops will always be zero,
and reporting no drops on a receive queue that isn't used for those
non-participating protocols seems reasonable to me.  This also saves us having
to code in a per-protocol opt in mechanism.

3) This applies cleanly to net-next assuming that commit
977750076d (my af packet cmsg patch) is reverted

Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-10-12 13:26:31 -07:00
Stephen Hemminger ec1b4cf74c net: mark net_proto_ops as const
All usages of structure net_proto_ops should be declared const.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-10-07 01:10:46 -07:00
Stephen Hemminger 5ca1b998d3 net: file_operations should be const
All instances of file_operations should be const.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-09-02 01:03:53 -07:00
Stephen Hemminger 98147d527a net: seq_operations should be const
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-09-02 01:03:39 -07:00
Eric Dumazet 31e6d363ab net: correct off-by-one write allocations reports
commit 2b85a34e91
(net: No more expensive sock_hold()/sock_put() on each tx)
changed initial sk_wmem_alloc value.

We need to take into account this offset when reporting
sk_wmem_alloc to user, in PROC_FS files or various
ioctls (SIOCOUTQ/TIOCOUTQ)

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-06-18 00:29:12 -07:00
Wei Yongjun 6f96106867 af_key: remove some pointless conditionals before kfree_skb()
Remove some pointless conditionals before kfree_skb().

Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-02-26 23:07:32 -08:00
Timo Teras a8d694c651 af_key: initialize xfrm encap_oa
Currently encap_oa is left uninitialized, so it contains garbage data which
is visible to userland via Netlink. Initialize it by zeroing it out.

Signed-off-by: Timo Teras <timo.teras@iki.fi>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-25 20:49:14 -08:00
Alexey Dobriyan 7013ec30e0 netns PF_KEY: per-netns /proc/pfkey
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-11-25 17:59:00 -08:00
Alexey Dobriyan 07fb0f1799 netns PF_KEY: part 2
* interaction with userspace -- take netns from userspace socket.
* in ->notify hook take netns either from SA or explicitly passed --
	we don't know if SA/SPD flush is coming.
* stub policy migration with init_net for now.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-11-25 17:58:31 -08:00
Alexey Dobriyan 3fa87a3210 netns PF_KEY: part 1
* netns boilerplate
* keep per-netns socket list
* keep per-netns number of sockets

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-11-25 17:58:07 -08:00
Alexey Dobriyan 7067802e26 netns xfrm: pass netns with KM notifications
SA and SPD flush are executed with NULL SA and SPD respectively, for
these cases pass netns explicitly from userspace socket.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-11-25 17:50:36 -08:00
Alexey Dobriyan cdcbca7c1f netns xfrm: policy walking in netns
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-11-25 17:34:49 -08:00
Alexey Dobriyan 8d1211a6aa netns xfrm: finding policy in netns
Add netns parameter to xfrm_policy_bysel_ctx(), xfrm_policy_byidx().

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-11-25 17:34:20 -08:00
Alexey Dobriyan 33ffbbd52c netns xfrm: policy flushing in netns
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-11-25 17:33:32 -08:00
Alexey Dobriyan 284fa7da30 netns xfrm: state walking in netns
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-11-25 17:32:14 -08:00
Alexey Dobriyan 5447c5e401 netns xfrm: finding states in netns
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-11-25 17:31:51 -08:00
Alexey Dobriyan 221df1ed33 netns xfrm: state lookup in netns
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-11-25 17:30:50 -08:00
Alexey Dobriyan 0e6024519b netns xfrm: state flush in netns
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-11-25 17:30:18 -08:00
Alexey Dobriyan 0331b1f383 netns xfrm: add struct xfrm_policy::xp_net
Again, to avoid complications with passing netns when not necessary.
Again, ->xp_net is set-once field, once set it never changes.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-11-25 17:21:45 -08:00
Alexey Dobriyan 50a30657fd netns xfrm: per-netns km_waitq
Disallow spurious wakeups in __xfrm_lookup().

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-11-25 17:21:01 -08:00
Alexey Dobriyan 673c09be45 netns xfrm: add struct xfrm_state::xs_net
To avoid unnecessary complications with passing netns around.

* set once, very early after allocating
* once set, never changes

For a while create every xfrm_state in init_net.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-11-25 17:15:16 -08:00
Alexey Dobriyan 70e90679ff af_key: mark policy as dead before destroying
xfrm_policy_destroy() will oops if not dead policy is passed to it.
On error path in pfkey_compile_policy() exactly this happens.

Oopsable for CAP_NET_ADMIN owners.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-11-06 23:08:37 -08:00
Alexey Dobriyan 920da6923c key: fix setkey(8) policy set breakage
Steps to reproduce:

	#/usr/sbin/setkey -f
	flush;
	spdflush;

	add 192.168.0.42 192.168.0.1 ah 24500 -A hmac-md5 "1234567890123456";
	add 192.168.0.42 192.168.0.1 esp 24501 -E 3des-cbc "123456789012123456789012";

	spdadd 192.168.0.42 192.168.0.1 any -P out ipsec
		esp/transport//require
		ah/transport//require;

setkey: invalid keymsg length

Policy dump will bail out with the same message after that.

-recv(4, "\2\16\0\0\32\0\3\0\0\0\0\0\37\r\0\0\3\0\5\0\377 \0\0\2\0\0\0\300\250\0*\0"..., 32768, 0) = 208
+recv(4, "\2\16\0\0\36\0\3\0\0\0\0\0H\t\0\0\3\0\5\0\377 \0\0\2\0\0\0\300\250\0*\0"..., 32768, 0) = 208

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-31 16:41:26 -07:00
Tobias Brunner 1839faab9a af_key: fix SADB_X_SPDDELETE response
When deleting an SPD entry using SADB_X_SPDDELETE, c.data.byid is not
initialized to zero in pfkey_spddelete(). Thus, key_notify_policy()
responds with a PF_KEY message of type SADB_X_SPDDELETE2 instead of
SADB_X_SPDDELETE.

Signed-off-by: Tobias Brunner <tobias.brunner@strongswan.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-10 14:07:03 -07:00
Arnaud Ebalard 13c1d18931 xfrm: MIGRATE enhancements (draft-ebalard-mext-pfkey-enhanced-migrate)
Provides implementation of the enhancements of XFRM/PF_KEY MIGRATE mechanism
specified in draft-ebalard-mext-pfkey-enhanced-migrate-00. Defines associated
PF_KEY SADB_X_EXT_KMADDRESS extension and XFRM/netlink XFRMA_KMADDRESS
attribute.

Signed-off-by: Arnaud Ebalard <arno@natisbad.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-05 13:33:42 -07:00
Herbert Xu 12a169e7d8 ipsec: Put dumpers on the dump list
Herbert Xu came up with the idea and the original patch to make
xfrm_state dump list contain also dumpers:

As it is we go to extraordinary lengths to ensure that states
don't go away while dumpers go to sleep.  It's much easier if
we just put the dumpers themselves on the list since they can't
go away while they're going.

I've also changed the order of addition on new states to prevent
a never-ending dump.

Timo Teräs improved the patch to apply cleanly to latest tree,
modified iteration code to be more readable by using a common
struct for entries in the list, implemented the same idea for
xfrm_policy dumping and moved the af_key specific "last" entry
caching to af_key.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Timo Teras <timo.teras@iki.fi>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-01 07:03:24 -07:00
Timo Teras 0523820482 af_key: Free dumping state on socket close
Fix a xfrm_{state,policy}_walk leak if pfkey socket is closed while
dumping is on-going.

Signed-off-by: Timo Teras <timo.teras@iki.fi>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-01 05:17:54 -07:00
Ilpo Järvinen 547b792cac net: convert BUG_TRAP to generic WARN_ON
Removes legacy reinvent-the-wheel type thing. The generic
machinery integrates much better to automated debugging aids
such as kerneloops.org (and others), and is unambiguous due to
better naming. Non-intuively BUG_TRAP() is actually equal to
WARN_ON() rather than BUG_ON() though some might actually be
promoted to BUG_ON() but I left that to future.

I could make at least one BUILD_BUG_ON conversion.

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-07-25 21:43:18 -07:00
David S. Miller 4ae127d1b6 Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
Conflicts:

	drivers/net/smc911x.c
2008-06-13 20:52:39 -07:00
YOSHIFUJI Hideaki 81b302a321 key: Use xfrm_addr_cmp() where appropriate.
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
2008-06-12 02:38:17 +09:00
YOSHIFUJI Hideaki 5f95ac9111 key: Share common code path to extract address from sockaddr{}.
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
2008-06-12 02:38:17 +09:00
YOSHIFUJI Hideaki e5b56652c1 key: Share common code path to fill sockaddr{}.
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
2008-06-12 02:38:16 +09:00
YOSHIFUJI Hideaki 9e8b4ed8bb key: Introduce pfkey_sockaddr_len() for raw sockaddr{} length.
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
2008-06-12 02:38:15 +09:00
Jamal Hadi Salim 99c6f60e72 ipsec: pfkey should ignore events when no listeners
When pfkey has no km listeners, it still does a lot of work
before finding out there aint nobody out there.
If a tree falls in a forest and no one is around to hear it, does it make
a sound? In this case it makes a lot of noise:
With this short-circuit adding 10s of thousands of SAs using
netlink improves performance by ~10%.

Signed-off-by: Jamal Hadi Salim <hadi@cyberus.ca>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-06-10 14:25:34 -07:00
Kazunori MIYAZAWA 4da5105687 af_key: Fix selector family initialization.
This propagates the xfrm_user fix made in commit
bcf0dda8d2 ("[XFRM]: xfrm_user: fix
selector family initialization")

Based upon a bug report from, and tested by, Alan Swanson.

Signed-off-by: Kazunori MIYAZAWA <kazunori@miyazawa.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-05-21 13:26:11 -07:00
Eric Paris 2532386f48 Audit: collect sessionid in netlink messages
Previously I added sessionid output to all audit messages where it was
available but we still didn't know the sessionid of the sender of
netlink messages.  This patch adds that information to netlink messages
so we can audit who sent netlink messages.

Signed-off-by: Eric Paris <eparis@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2008-04-28 06:18:03 -04:00
Brian Haley 2db3e47e70 af_key: Fix af_key.c compiler warning
net/key/af_key.c: In function ‘pfkey_spddelete’:
net/key/af_key.c:2359: warning: ‘pol_ctx’ may be used uninitialized in 
this function

When CONFIG_SECURITY_NETWORK_XFRM isn't set, 
security_xfrm_policy_alloc() is an inline that doesn't set pol_ctx, so 
this seemed like the easiest fix short of using *uninitialized_var(pol_ctx).

Signed-off-by: Brian Haley <brian.haley@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-04-24 20:38:31 -07:00
Herbert Xu c5d18e984a [IPSEC]: Fix catch-22 with algorithm IDs above 31
As it stands it's impossible to use any authentication algorithms
with an ID above 31 portably.  It just happens to work on x86 but
fails miserably on ppc64.

The reason is that we're using a bit mask to check the algorithm
ID but the mask is only 32 bits wide.

After looking at how this is used in the field, I have concluded
that in the long term we should phase out state matching by IDs
because this is made superfluous by the reqid feature.  For current
applications, the best solution IMHO is to allow all algorithms when
the bit masks are all ~0.

The following patch does exactly that.

This bug was identified by IBM when testing on the ppc64 platform
using the NULL authentication algorithm which has an ID of 251.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-04-22 00:46:42 -07:00
Paul Moore 03e1ad7b5d LSM: Make the Labeled IPsec hooks more stack friendly
The xfrm_get_policy() and xfrm_add_pol_expire() put some rather large structs
on the stack to work around the LSM API.  This patch attempts to fix that
problem by changing the LSM API to require only the relevant "security"
pointers instead of the entire SPD entry; we do this for all of the
security_xfrm_policy*() functions to keep things consistent.

Signed-off-by: Paul Moore <paul.moore@hp.com>
Acked-by: James Morris <jmorris@namei.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-04-12 19:07:52 -07:00
David S. Miller 8e8e43843b Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6
Conflicts:

	drivers/net/usb/rndis_host.c
	drivers/net/wireless/b43/dma.c
	net/ipv6/ndisc.c
2008-03-27 18:48:56 -07:00
Kazunori MIYAZAWA df9dcb4588 [IPSEC]: Fix inter address family IPsec tunnel handling.
Signed-off-by: Kazunori MIYAZAWA <kazunori@miyazawa.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-03-24 14:51:51 -07:00
Timo Teras 83321d6b98 [AF_KEY]: Dump SA/SP entries non-atomically
Stop dumping of entries when af_key socket receive queue is getting
full and continue it later when there is more room again.

This fixes dumping of large databases. Currently the entries not
fitting into the receive queue are just dropped (including the
end-of-dump message) which can confuse applications.

Signed-off-by: Timo Teras <timo.teras@iki.fi>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-03-03 23:40:12 -08:00
Timo Teras 4c563f7669 [XFRM]: Speed up xfrm_policy and xfrm_state walking
Change xfrm_policy and xfrm_state walking algorithm from O(n^2) to O(n).
This is achieved adding the entries to one more list which is used
solely for walking the entries.

This also fixes some races where the dump can have duplicate or missing
entries when the SPD/SADB is modified during an ongoing dump.

Dumping SADB with 20000 entries using "time ip xfrm state" the sys
time dropped from 1.012s to 0.080s.

Signed-off-by: Timo Teras <timo.teras@iki.fi>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-02-28 21:31:08 -08:00
David S. Miller d9595a7b9c [AF_KEY]: Fix oops by converting to proc_net_*().
To make sure the procfs visibility occurs after the ->proc_fs ops are
setup, use proc_net_fops_create() and proc_net_remove().

This also fixes an OOPS after module unload in that the name string
for remove was wrong, so it wouldn't actually be removed.  That bug
was introduced by commit 61145aa1a1
("[KEY]: Clean up proc files creation a bit.")

Signed-off-by: David S. Miller <davem@davemloft.net>
2008-02-26 22:23:31 -08:00
Kazunori MIYAZAWA a4d6b8af1e [AF_KEY]: Fix bug in spdadd
This patch fix a BUG when adding spds which have same selector.

Signed-off-by: Kazunori MIYAZAWA <kazunori@miyazawa.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-02-14 14:51:38 -08:00