linux-toradex.git/net/ipv4/ip_sockglue.c, branch v3.2.9-rt16

net: use INET_ECN_MASK instead of hardcoded 3

2011-10-22T04:07:47+00:00

Signed-off-by: Maciej Żenczykowski 
Signed-off-by: David S. Miller

net: allow CAP_NET_RAW to set socket options IP{,V6}_TRANSPARENT

2011-10-20T22:21:36+00:00

Up till now the IP{,V6}_TRANSPARENT socket options (which actually set
the same bit in the socket struct) have required CAP_NET_ADMIN
privileges to set or clear the option.

- we make clearing the bit not require any privileges.
- we allow CAP_NET_ADMIN to set the bit (as before this change)
- we allow CAP_NET_RAW to set this bit, because raw
  sockets already pretty much effectively allow you
  to emulate socket transparency.

Signed-off-by: Maciej Żenczykowski 
Signed-off-by: David S. Miller

ipv4: Fix ip_getsockopt for IP_PKTOPTIONS

2011-08-08T05:31:07+00:00

IP_PKTOPTIONS is broken for 32-bit applications running
in COMPAT mode on 64-bit kernels.

This happens because msghdr's msg_flags field is always
set to zero. When running in COMPAT mode this should be
set to MSG_CMSG_COMPAT instead.

Signed-off-by: Tiberiu Szocs-Mihai 
Signed-off-by: Daniel Baluta 
Signed-off-by: David S. Miller

inet: add RCU protection to inet->opt

2011-04-28T20:16:35+00:00

We lack proper synchronization to manipulate inet->opt ip_options

Problem is ip_make_skb() calls ip_setup_cork() and
ip_setup_cork() possibly makes a copy of ipc->opt (struct ip_options),
without any protection against another thread manipulating inet->opt.

Another thread can change inet->opt pointer and free old one under us.

Use RCU to protect inet->opt (changed to inet->inet_opt).

Instead of handling atomic refcounts, just copy ip_options when
necessary, to avoid cache line dirtying.

We cant insert an rcu_head in struct ip_options since its included in
skb->cb[], so this patch is large because I had to introduce a new
ip_options_rcu structure.

Signed-off-by: Eric Dumazet 
Cc: Herbert Xu 
Signed-off-by: David S. Miller

inet: constify ip headers and in6_addr

2011-04-22T18:04:14+00:00

Add const qualifiers to structs iphdr, ipv6hdr and in6_addr pointers
where possible, to make code intention more obvious.

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

ipv4: add __rcu annotations to ip_ra_chain

2010-10-25T21:18:28+00:00

Add __rcu annotations to :
        (struct ip_ra_chain)->next
	struct ip_ra_chain *ip_ra_chain;

And use appropriate rcu primitives.

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

ipv4: enable getsockopt() for IP_NODEFRAG

2010-09-14T02:57:23+00:00

While integrating your man-pages patch for IP_NODEFRAG, I noticed
that this option is settable by setsockopt(), but not gettable by
getsockopt(). I suppose this is not intended. The (untested,
trivial) patch below adds getsockopt() support.

Signed-off-by: Michael kerrisk 
Acked-by: Jiri Olsa 
Signed-off-by: David S. Miller

net - IP_NODEFRAG option for IPv4 socket

2010-06-23T20:16:38+00:00

this patch is implementing IP_NODEFRAG option for IPv4 socket.
The reason is, there's no other way to send out the packet with user
customized header of the reassembly part.

Signed-off-by: Jiri Olsa 
Signed-off-by: David S. Miller

ip: ip_ra_control() rcu fix

2010-06-11T05:47:08+00:00

commit 66018506e15b (ip: Router Alert RCU conversion) introduced RCU
lookups to ip_call_ra_chain(). It missed proper deinit phase :
When ip_ra_control() deletes an ip_ra_chain, it should make sure
ip_call_ra_chain() users can not start to use socket during the rcu
grace period. It should also delay the sock_put() after the grace
period, or we risk a premature socket freeing and corruptions, as
raw sockets are not rcu protected yet.

This delay avoids using expensive atomic_inc_not_zero() in
ip_call_ra_chain().

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

ip: Router Alert RCU conversion

2010-06-08T04:25:21+00:00

Straightforward conversion to RCU.

One rwlock becomes a spinlock, and is static.

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