linux.git/net/core/rtnetlink.c, branch v4.13

rtnetlink: allocate more memory for dev_set_mac_address()

2017-07-20T22:23:22+00:00

virtnet_set_mac_address() interprets mac address as struct
sockaddr, but upper layer only allocates dev->addr_len
which is ETH_ALEN + sizeof(sa_family_t) in this case.

We lack a unified definition for mac address, so just fix
the upper layer, this also allows drivers to interpret it
to struct sockaddr freely.

Reported-by: David Ahern 
Signed-off-by: Cong Wang 
Signed-off-by: David S. Miller

Revert "rtnetlink: Do not generate notifications for CHANGEADDR event"

2017-07-20T05:29:41+00:00

This reverts commit cd8966e75ed3c6b41a37047a904617bc44fa481f.

The duplicate CHANGEADDR event message is sent regardless of link
status whereas the setlink changes only generate a notification when
the link is up. Not sending a notification when the link is down breaks
dhcpcd which only processes hwaddr changes when the link is down.

Fixes reported regression:
    https://bugzilla.kernel.org/show_bug.cgi?id=196355

Reported-by: Yaroslav Isakov 
Signed-off-by: David Ahern 
Signed-off-by: David S. Miller

net: convert sk_buff.users from atomic_t to refcount_t

2017-07-01T14:39:07+00:00

refcount_t type and corresponding API should be
used instead of atomic_t when the variable is used as
a reference counter. This allows to avoid accidental
refcounter overflows that might lead to use-after-free
situations.

Signed-off-by: Elena Reshetova 
Signed-off-by: Hans Liljestrand 
Signed-off-by: Kees Cook 
Signed-off-by: David Windsor 
Signed-off-by: David S. Miller

net: add netlink_ext_ack argument to rtnl_link_ops.slave_validate

2017-06-27T03:13:22+00:00

Add support for extended error reporting.

Signed-off-by: Matthias Schiffer 
Acked-by: David Ahern 
Signed-off-by: David S. Miller

net: add netlink_ext_ack argument to rtnl_link_ops.slave_changelink

2017-06-27T03:13:22+00:00

Add support for extended error reporting.

Signed-off-by: Matthias Schiffer 
Acked-by: David Ahern 
Signed-off-by: David S. Miller

net: add netlink_ext_ack argument to rtnl_link_ops.validate

2017-06-27T03:13:22+00:00

Add support for extended error reporting.

Signed-off-by: Matthias Schiffer 
Acked-by: David Ahern 
Signed-off-by: David S. Miller

net: add netlink_ext_ack argument to rtnl_link_ops.changelink

2017-06-27T03:13:22+00:00

Add support for extended error reporting.

Signed-off-by: Matthias Schiffer 
Acked-by: David Ahern 
Signed-off-by: David S. Miller

net: add netlink_ext_ack argument to rtnl_link_ops.newlink

2017-06-27T03:13:21+00:00

Add support for extended error reporting.

Signed-off-by: Matthias Schiffer 
Acked-by: David Ahern 
Signed-off-by: David S. Miller

xdp: add reporting of offload mode

2017-06-23T17:42:20+00:00

Extend the XDP_ATTACHED_* values to include offloaded mode.
Let drivers report whether program is installed in the driver
or the HW by changing the prog_attached field from bool to
u8 (type of the netlink attribute).

Exploit the fact that the value of XDP_ATTACHED_DRV is 1,
therefore since all drivers currently assign the mode with
double negation:
       mode = !!xdp_prog;
no drivers have to be modified.

Signed-off-by: Jakub Kicinski 
Acked-by: Daniel Borkmann 
Signed-off-by: David S. Miller

xdp: add HW offload mode flag for installing programs

2017-06-23T17:42:19+00:00

Add an installation-time flag for requesting that the program
be installed only if it can be offloaded to HW.

Internally new command for ndo_xdp is added, this way we avoid
putting checks into drivers since they all return -EINVAL on
an unknown command.

Signed-off-by: Jakub Kicinski 
Acked-by: Daniel Borkmann 
Signed-off-by: David S. Miller