linux-toradex.git/net/core/rtnetlink.c, branch v3.0.41

net: feed /dev/random with the MAC address when registering a device

2012-08-15T19:04:13+00:00

commit 7bf2357524408b97fec58344caf7397f8140c3fd upstream.

Signed-off-by: "Theodore Ts'o" 
Cc: David Miller 
Cc: Linus Torvalds 
Signed-off-by: Greg Kroah-Hartman

net: fix rtnetlink IFF_PROMISC and IFF_ALLMULTI handling

2012-08-09T15:27:52+00:00

[ Upstream commit b1beb681cba5358f62e6187340660ade226a5fcc ]

When device flags are set using rtnetlink, IFF_PROMISC and IFF_ALLMULTI
flags are handled specially. Function dev_change_flags sets IFF_PROMISC and
IFF_ALLMULTI bits in dev->gflags according to the passed value but
do_setlink passes a result of rtnl_dev_combine_flags which takes those bits
from dev->flags.

This can be easily trigerred by doing:

tcpdump -i eth0 &
ip l s up eth0

ip sets IFF_UP flag in ifi_flags and ifi_change, which is combined with
IFF_PROMISC by rtnl_dev_combine_flags, causing __dev_change_flags to set
IFF_PROMISC in gflags.

Reported-by: Max Matveev 
Signed-off-by: Jiri Benc 
Signed-off-by: David S. Miller 
Signed-off-by: Greg Kroah-Hartman

Merge git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/linux-2.6-nsfd

2011-05-26T01:10:16+00:00

* git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/linux-2.6-nsfd:
  net: fix get_net_ns_by_fd for !CONFIG_NET_NS
  ns proc: Return -ENOENT for a nonexistent /proc/self/ns/ entry.
  ns: Declare sys_setns in syscalls.h
  net: Allow setting the network namespace by fd
  ns proc: Add support for the ipc namespace
  ns proc: Add support for the uts namespace
  ns proc: Add support for the network namespace.
  ns: Introduce the setns syscall
  ns: proc files for namespace naming policy.

net: hold rtnl again in dump callbacks

2011-05-25T21:55:32+00:00

Commit e67f88dd12f6 (dont hold rtnl mutex during netlink dump callbacks)
missed fact that rtnl_fill_ifinfo() must be called with rtnl held.

Because of possible deadlocks between two mutexes (cb_mutex and rtnl),
its not easy to solve this problem, so revert this part of the patch.

It also forgot one rcu_read_unlock() in FIB dump_rules()

Add one ASSERT_RTNL() in rtnl_fill_ifinfo() to remind us the rule.

Signed-off-by: Eric Dumazet 
CC: Patrick McHardy 
CC: Stephen Hemminger 
Signed-off-by: David S. Miller

rtnetlink: ignore NETDEV_RELEASE and NETDEV_JOIN event

2011-05-23T01:01:19+00:00

These two events are not expected to be caught by userspace.

Signed-off-by: WANG Cong 
Signed-off-by: David S. Miller

net: Allow setting the network namespace by fd

2011-05-10T21:36:03+00:00

Take advantage of the new abstraction and allow network devices
to be placed in any network namespace that we have a fd to talk
about.

Acked-by: David S. Miller 
Acked-by: Daniel Lezcano 
Signed-off-by: Eric W. Biederman

net: use batched device unregister in veth and macvlan

2011-05-09T18:41:40+00:00

veth devices dont use the batched device unregisters yet.

Since veth are a pair of devices, it makes sense to use a batch of two
unregisters, this roughly divides dismantle time by two.

Fix this by changing dellink() callers to always provide a non NULL
head. (Idea from Michał Mirosław)

This patch also handles macvlan case : We now dismantle all macvlans on
top of a lower dev at once.

Reported-by: Alex Bligh 
Signed-off-by: Eric Dumazet 
Cc: Michał Mirosław 
Cc: Jesse Gross 
Cc: Paul E. McKenney 
Cc: Ben Greear 
Signed-off-by: David S. Miller

net: call dev_alloc_name from register_netdevice

2011-05-05T17:57:45+00:00

Force dev_alloc_name() to be called from register_netdevice() by
dev_get_valid_name(). That allows to remove multiple explicit
dev_alloc_name() calls.

The possibility to call dev_alloc_name in advance remains.

This also fixes veth creation regresion caused by
84c49d8c3e4abefb0a41a77b25aa37ebe8d6b743

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

net: dont hold rtnl mutex during netlink dump callbacks

2011-05-02T22:26:28+00:00

Four years ago, Patrick made a change to hold rtnl mutex during netlink
dump callbacks.

I believe it was a wrong move. This slows down concurrent dumps, making
good old /proc/net/ files faster than rtnetlink in some situations.

This occurred to me because one "ip link show dev ..." was _very_ slow
on a workload adding/removing network devices in background.

All dump callbacks are able to use RCU locking now, so this patch does
roughly a revert of commits :

1c2d670f366 : [RTNETLINK]: Hold rtnl_mutex during netlink dump callbacks
6313c1e0992 : [RTNETLINK]: Remove unnecessary locking in dump callbacks

This let writers fight for rtnl mutex and readers going full speed.

It also takes care of phonet : phonet_route_get() is now called from rcu
read section. I renamed it to phonet_route_get_rcu()

Signed-off-by: Eric Dumazet 
Cc: Patrick McHardy 
Cc: Remi Denis-Courmont 
Acked-by: Stephen Hemminger 
Signed-off-by: David S. Miller

Fix common misspellings

2011-03-31T14:26:23+00:00

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi