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| author | Robert Shearman <rshearma@vyatta.att-mail.com> | 2018-11-07 16:36:02 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-11-08 01:12:38 +0100 |
| commit | 3c82a21f4320c8d54cf6456b27c8d49e5ffb722e (patch) | |
| tree | a281d34b7cdb8bf01fe13c387ab95bce8bd87e81 /Documentation/networking | |
| parent | net: hns3: Remove set but not used variable 'reset_level' (diff) | |
| download | linux-3c82a21f4320c8d54cf6456b27c8d49e5ffb722e.tar.xz linux-3c82a21f4320c8d54cf6456b27c8d49e5ffb722e.zip | |
net: allow binding socket in a VRF when there's an unbound socket
Change the inet socket lookup to avoid packets arriving on a device
enslaved to an l3mdev from matching unbound sockets by removing the
wildcard for non sk_bound_dev_if and instead relying on check against
the secondary device index, which will be 0 when the input device is
not enslaved to an l3mdev and so match against an unbound socket and
not match when the input device is enslaved.
Change the socket binding to take the l3mdev into account to allow an
unbound socket to not conflict sockets bound to an l3mdev given the
datapath isolation now guaranteed.
Signed-off-by: Robert Shearman <rshearma@vyatta.att-mail.com>
Signed-off-by: Mike Manning <mmanning@vyatta.att-mail.com>
Reviewed-by: David Ahern <dsahern@gmail.com>
Tested-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'Documentation/networking')
| -rw-r--r-- | Documentation/networking/vrf.txt | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/Documentation/networking/vrf.txt b/Documentation/networking/vrf.txt index 8ff7b4c8f91b..d4b129402d57 100644 --- a/Documentation/networking/vrf.txt +++ b/Documentation/networking/vrf.txt @@ -103,6 +103,11 @@ VRF device: or to specify the output device using cmsg and IP_PKTINFO. +By default the scope of the port bindings for unbound sockets is +limited to the default VRF. That is, it will not be matched by packets +arriving on interfaces enslaved to an l3mdev and processes may bind to +the same port if they bind to an l3mdev. + TCP & UDP services running in the default VRF context (ie., not bound to any VRF device) can work across all VRF domains by enabling the tcp_l3mdev_accept and udp_l3mdev_accept sysctl options: @@ -112,10 +117,6 @@ tcp_l3mdev_accept and udp_l3mdev_accept sysctl options: netfilter rules on the VRF device can be used to limit access to services running in the default VRF context as well. -The default VRF does not have limited scope with respect to port bindings. -That is, if a process does a wildcard bind to a port in the default VRF it -owns the port across all VRF domains within the network namespace. - ################################################################################ Using iproute2 for VRFs |