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  1. 14 1月, 2014 3 次提交
    • H
      ipv4: introduce ip_dst_mtu_maybe_forward and protect forwarding path against pmtu spoofing · f87c10a8
      由 Hannes Frederic Sowa 提交于 
      While forwarding we should not use the protocol path mtu to calculate
the mtu for a forwarded packet but instead use the interface mtu.

We mark forwarded skbs in ip_forward with IPSKB_FORWARDED, which was
introduced for multicast forwarding. But as it does not conflict with
our usage in unicast code path it is perfect for reuse.

I moved the functions ip_sk_accept_pmtu, ip_sk_use_pmtu and ip_skb_dst_mtu
along with the new ip_dst_mtu_maybe_forward to net/ip.h to fix circular
dependencies because of IPSKB_FORWARDED.

Because someone might have written a software which does probe
destinations manually and expects the kernel to honour those path mtus
I introduced a new per-namespace "ip_forward_use_pmtu" knob so someone
can disable this new behaviour. We also still use mtus which are locked on a
route for forwarding.

The reason for this change is, that path mtus information can be injected
into the kernel via e.g. icmp_err protocol handler without verification
of local sockets. As such, this could cause the IPv4 forwarding path to
wrongfully emit fragmentation needed notifications or start to fragment
packets along a path.

Tunnel and ipsec output paths clear IPCB again, thus IPSKB_FORWARDED
won't be set and further fragmentation logic will use the path mtu to
determine the fragmentation size. They also recheck packet size with
help of path mtu discovery and report appropriate errors.

Cc: Eric Dumazet <eric.dumazet@gmail.com>
Cc: David Miller <davem@davemloft.net>
Cc: John Heffner <johnwheffner@gmail.com>
Cc: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: NHannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      f87c10a8
    • T
      HHF qdisc: fix jiffies-time conversion. · 6c76a07a
      由 Terry Lam 提交于 
      This is to be compatible with the use of "get_time" (i.e. default
time unit in us) in iproute2 patch for HHF as requested by Stephen.
Signed-off-by: NTerry Lam <vtlam@google.com>
Acked-by: NNandita Dukkipati <nanditad@google.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      6c76a07a
    • J
      qlcnic: Convert vmalloc/memset to kcalloc · f3c0773f
      由 Joe Perches 提交于 
      vmalloc is a limited resource.  Don't use it unnecessarily.

It seems this allocation should work with kcalloc.

Remove unnecessary memset(,0,) of buf as it's completely
overwritten as the previously only unset field in
struct qlcnic_pci_func_cfg is now set to 0.

Use kfree instead of vfree.
Use ETH_ALEN instead of 6.
Signed-off-by: NJoe Perches <joe@perches.com>
Acked-by: NJitendra Kalsaria <jitendra.kalsaria@qlogic.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      f3c0773f
  3. 13 1月, 2014 3 次提交
  5. 12 1月, 2014 7 次提交
  7. 11 1月, 2014 26 次提交
  9. 10 1月, 2014 1 次提交