linux.git/net/wireless/util.c, branch v4.11

net: adjust skb->truesize in pskb_expand_head()

2017-01-27T17:03:29+00:00

Slava Shwartsman reported a warning in skb_try_coalesce(), when we
detect skb->truesize is completely wrong.

In his case, issue came from IPv6 reassembly coping with malicious
datagrams, that forced various pskb_may_pull() to reallocate a bigger
skb->head than the one allocated by NIC driver before entering GRO
layer.

Current code does not change skb->truesize, leaving this burden to
callers if they care enough.

Blindly changing skb->truesize in pskb_expand_head() is not
easy, as some producers might track skb->truesize, for example
in xmit path for back pressure feedback (sk->sk_wmem_alloc)

We can detect the cases where it should be safe to change
skb->truesize :

1) skb is not attached to a socket.
2) If it is attached to a socket, destructor is sock_edemux()

My audit gave only two callers doing their own skb->truesize
manipulation.

I had to remove skb parameter in sock_edemux macro when
CONFIG_INET is not set to avoid a compile error.

Signed-off-by: Eric Dumazet 
Reported-by: Slava Shwartsman 
Signed-off-by: David S. Miller

cfg80211: Specify the reason for connect timeout

2017-01-13T08:46:18+00:00

This enhances the connect timeout API to also carry the reason for the
timeout. These reason codes for the connect time out are represented by
enum nl80211_timeout_reason and are passed to user space through a new
attribute NL80211_ATTR_TIMEOUT_REASON (u32).

Signed-off-by: Purushottam Kushwaha 
Signed-off-by: Jouni Malinen 
[keep gfp_t argument last]
Signed-off-by: Johannes Berg

cfg80211: move function checking range fit to util.c

2017-01-06T12:54:04+00:00

It is needed for another cfg80211 helper that will be out of reg.c so
move it to common util.c file and make it non-static.

Signed-off-by: Rafał Miłecki 
Signed-off-by: Johannes Berg

cfg80211: only pass sband to set_mandatory_flags_band()

2017-01-05T11:58:03+00:00

The supported band structure contains the band is applies to
so no need to pass it separately. Also added a default case
to the switch for completeness. The current code base does not
call this function with NUM_NL80211_BANDS but kept that case
statement although default case would cover that.

Signed-off-by: Arend van Spriel 
Signed-off-by: Johannes Berg

cfg80211: get rid of name indirection trick for ieee80211_get_channel()

2016-12-13T15:04:56+00:00

The comment on the name indirection suggested an issue but turned out
to be untrue. Digging in older kernel version showed issue with ipw2x00
but that is no longer true so get rid on the name indirection.

Signed-off-by: Arend van Spriel 
Signed-off-by: Johannes Berg

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

2016-11-22T18:27:16+00:00

All conflicts were simple overlapping changes except perhaps
for the Thunder driver.

That driver has a change_mtu method explicitly for sending
a message to the hardware.  If that fails it returns an
error.

Normally a driver doesn't need an ndo_change_mtu method becuase those
are usually just range changes, which are now handled generically.
But since this extra operation is needed in the Thunder driver, it has
to stay.

However, if the message send fails we have to restore the original
MTU before the change because the entire call chain expects that if
an error is thrown by ndo_change_mtu then the MTU did not change.
Therefore code is added to nicvf_change_mtu to remember the original
MTU, and to restore it upon nicvf_update_hw_max_frs() failue.

Signed-off-by: David S. Miller

cfg80211: add bitrate for 20MHz MCS 9

2016-11-15T13:34:00+00:00

Some drivers (ath10k) report MCS 9 @ 20MHz, which
technically isn't defined. To get more meaningful value
than 0 out of this however, just extrapolate a bitrate
from ratio of MCS 7 and 9 in channels where it is allowed.

Signed-off-by: Thomas Pedersen 
[add a comment about it in the code]
Signed-off-by: Johannes Berg

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

2016-10-30T16:42:58+00:00

Mostly simple overlapping changes.

For example, David Ahern's adjacency list revamp in 'net-next'
conflicted with an adjacency list traversal bug fix in 'net'.

Signed-off-by: David S. Miller

cfg80211: handle fragmented IEs in splitting

2016-10-27T14:03:27+00:00

The IEs "output" can sometimes combine IEs coming from userspace
with IEs generated in the kernel - in particular mac80211 does
this for association frames.

Add support in this code for the 802.11 IE fragmentation.

Signed-off-by: Johannes Berg

cfg80211: validate beacon int as part of iface combinations

2016-10-27T07:18:07+00:00

Remove the pointless checking against interface combinations in
the initial basic beacon interval validation, that currently isn't
taking into account radar detection or channels properly. Instead,
just validate the basic range there, and then delay real checking
to the interface combination validation that drivers must do.

This means that drivers wanting to use the beacon_int_min_gcd will
now have to pass the new_beacon_int when validating the AP/mesh
start.

Signed-off-by: Johannes Berg