linux.git/include/net/ip.h, branch v5.0-rc2

ip: factor out protocol delivery helper

2018-11-08T00:23:05+00:00

So that we can re-use it at the UDP level in a later patch

rfc v3 -> v1
 - add the helper declaration into the ip header

Signed-off-by: Paolo Abeni 
Signed-off-by: David S. Miller

net: Add extack argument to ip_fib_metrics_init

2018-11-06T23:00:45+00:00

Add extack argument to ip_fib_metrics_init and add messages for invalid
metrics.

Signed-off-by: David Ahern 
Signed-off-by: David S. Miller

net: Move free of dst_metrics to helper

2018-10-05T04:54:25+00:00

Move the refcounting and potential free of dst metrics associated
for ipv4 and ipv6 to a common helper.

Signed-off-by: David Ahern 
Signed-off-by: David S. Miller

net: common metrics init helper for dst_entry

2018-10-05T04:54:19+00:00

ipv4 and ipv6 both use refcounted metrics if FIB entries have metrics set.
Move the common initialization code to a helper and use for both protocols.

Signed-off-by: David Ahern 
Signed-off-by: David S. Miller

net: Move free of fib_metrics to helper

2018-10-05T04:54:10+00:00

Move the refcounting and potential free of dst metrics associated
with a fib entry to a helper and use it in both ipv4 and ipv6.

Signed-off-by: David Ahern 
Signed-off-by: David S. Miller

net: common metrics init helper for FIB entries

2018-10-05T04:54:03+00:00

Consolidate initialization of ipv4 and ipv6 metrics when fib entries
are created into a single helper, ip_fib_metrics_init, that handles
the call to ip_metrics_convert.

If no metrics are defined for the fib entry, then the metrics is set
to dst_default_metrics.

Signed-off-by: David Ahern 
Signed-off-by: David S. Miller

ip: remove tx_flags from ipcm_cookie and use same logic for v4 and v6

2018-07-07T01:58:49+00:00

skb_shinfo(skb)->tx_flags is derived from sk->sk_tsflags, possibly
after modification by __sock_cmsg_send, by calling sock_tx_timestamp.

The IPv4 and IPv6 paths do this conversion differently. In IPv4, the
individual protocols that support tx timestamps call this function
and store the result in ipc.tx_flags. In IPv6, sock_tx_timestamp is
called in __ip6_append_data.

There is no need to store both tx_flags and ts_flags in the cookie
as one is derived from the other. Convert when setting up the cork
and remove the redundant field. This is similar to IPv6, only have
the conversion happen only once per datagram, in ip(6)_setup_cork.

Also change __ip6_append_data to match __ip_append_data. Only update
tskey if timestamping is enabled with OPT_ID. The SOCK_.. test is
redundant: only valid protocols can have non-zero cork->tx_flags.

After this change the IPv4 and IPv6 logic is the same.

Signed-off-by: Willem de Bruijn 
Signed-off-by: David S. Miller

ipv4: ipcm_cookie initializers

2018-07-07T01:58:49+00:00

Initialize the cookie in one location to reduce code duplication and
avoid bugs from inconsistent initialization, such as that fixed in
commit 9887cba19978 ("ip: limit use of gso_size to udp").

Signed-off-by: Willem de Bruijn 
Signed-off-by: David S. Miller

net: ipv4: listified version of ip_rcv

2018-07-04T05:06:20+00:00

Also involved adding a way to run a netfilter hook over a list of packets.
 Rather than attempting to make netfilter know about lists (which would be
 a major project in itself) we just let it call the regular okfn (in this
 case ip_rcv_finish()) for any packets it steals, and have it give us back
 a list of packets it's synchronously accepted (which normally NF_HOOK
 would automatically call okfn() on, but we want to be able to potentially
 pass the list to a listified version of okfn().)
The netfilter hooks themselves are indirect calls that still happen per-
 packet (see nf_hook_entry_hookfn()), but again, changing that can be left
 for future work.

There is potential for out-of-order receives if the netfilter hook ends up
 synchronously stealing packets, as they will be processed before any
 accepts earlier in the list.  However, it was already possible for an
 asynchronous accept to cause out-of-order receives, so presumably this is
 considered OK.

Signed-off-by: Edward Cree 
Signed-off-by: David S. Miller

ipv4: add __ip_queue_xmit() that supports tos param

2018-07-04T02:36:54+00:00

This patch introduces __ip_queue_xmit(), through which the callers
can pass tos param into it without having to set inet->tos. For
ipv6, ip6_xmit() already allows passing tclass parameter.

It's needed when some transport protocol doesn't use inet->tos,
like sctp's per transport dscp, which will be added in next patch.

Signed-off-by: Xin Long 
Signed-off-by: David S. Miller