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  1. 24 Mar, 2017 7 commits
    • Davide Caratti's avatar
      sched: act_csum: don't mangle TCP and UDP GSO packets · add641e7
      Davide Caratti authored 
      after act_csum computes the checksum on skbs carrying GSO TCP/UDP packets,
subsequent segmentation fails because skb_needs_check(skb, true) returns
true. Because of that, skb_warn_bad_offload() is invoked and the following
message is displayed:

WARNING: CPU: 3 PID: 28 at net/core/dev.c:2553 skb_warn_bad_offload+0xf0/0xfd
<...>

  [<ffffffff8171f486>] skb_warn_bad_offload+0xf0/0xfd
  [<ffffffff8161304c>] __skb_gso_segment+0xec/0x110
  [<ffffffff8161340d>] validate_xmit_skb+0x12d/0x2b0
  [<ffffffff816135d2>] validate_xmit_skb_list+0x42/0x70
  [<ffffffff8163c560>] sch_direct_xmit+0xd0/0x1b0
  [<ffffffff8163c760>] __qdisc_run+0x120/0x270
  [<ffffffff81613b3d>] __dev_queue_xmit+0x23d/0x690
  [<ffffffff81613fa0>] dev_queue_xmit+0x10/0x20

Since GSO is able to compute checksum on individual segments of such skbs,
we can simply skip mangling the packet.
Signed-off-by: default avatarDavide Caratti <dcaratti@redhat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      add641e7
    • Jie Deng's avatar
      net: dwc-xlgmac: use dual license · 67ff2c71
      Jie Deng authored 
      The driver "dwc-xlgmac" is dual-licensed.
Declare the dual license with MODULE_LICENSE().
Signed-off-by: default avatarJie Deng <jiedeng@synopsys.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      67ff2c71
    • Jie Deng's avatar
      net: dwc-xlgmac: declaration of dual license in headers · ea8c1c64
      Jie Deng authored 
      The driver "dwc-xlgmac" is dual-licensed. This patch adds
declaration of dual license in file headers.
Signed-off-by: default avatarJie Deng <jiedeng@synopsys.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      ea8c1c64
    • David S. Miller's avatar
      Merge branch 'bpf-socket-cookie-uid' · 101a6e83
      David S. Miller authored 
      Chenbo Feng says:

====================
net: core: Two Helper function about socket information

Introduce two eBpf helper function to get the socket cookie and
socket uid for each packet. The helper function is useful when
the *sk field inside sk_buff is not empty. These helper functions
can be used on socket and uid based traffic monitoring programs.

Change since V7:
* change the user namespace of uid helper function to sock_net(sk)->user_ns

Change since V6:
* change the user namespace of uid helper function back to init_user_ns
  since in some situation, for example, pinned bpf object, the current
  user namespace is not always applicable.

Change since V5:
* Delete unnecessary blank lines in sample program.
* Refine the variable orders in get_uid helper function.

Change since V4:
* Using current user namespace to get uid instead of using init_ns.
* Add compiling setup of example program in to Makefile.
* Change the name style of the example program binaries.

Change since V3:
* Fixed some typos and incorrect comments in sample program
* replaced raw insns with BPF_STX_XADD and add it to libbpf.h
* Use a temp dir as mount point instead and added a check for
  the user input string.
* Make the get uid helper function returns the user namespace uid
  instead of kuid.
* Return a overflowuid instead of 0 when no uid information is found.

Change since V2:
* Add a sample program to demostrate the usage of the helper function.
* Moved the helper function proto invoking place.
* Add function header into tools/include
* Apply sk_to_full_sk() before getting uid.

Change since V1:
* Removed the unnecessary declarations and export command
* resolved conflict with master branch.
* Examine if the socket is a full socket before getting the uid.
====================
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      101a6e83
    • Chenbo Feng's avatar
      A Sample of using socket cookie and uid for traffic monitoring · 51570a5a
      Chenbo Feng authored 
      Add a sample program to demostrate the possible usage of
get_socket_cookie and get_socket_uid helper function. The program will
store bytes and packets counting of in/out traffic monitored by iptables
and store the stats in a bpf map in per socket base. The owner uid of
the socket will be stored as part of the data entry. A shell script for
running the program is also included.
Acked-by: default avatarAlexei Starovoitov <ast@kernel.org>
Acked-by: default avatarWillem de Bruijn <willemb@google.com>
Signed-off-by: default avatarChenbo Feng <fengc@google.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      51570a5a
    • Chenbo Feng's avatar
      Add a eBPF helper function to retrieve socket uid · 6acc5c29
      Chenbo Feng authored 
      Returns the owner uid of the socket inside a sk_buff. This is useful to
perform per-UID accounting of network traffic or per-UID packet
filtering. The socket need to be a fullsock otherwise overflowuid is
returned.
Signed-off-by: default avatarChenbo Feng <fengc@google.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      6acc5c29
    • Chenbo Feng's avatar
      Add a helper function to get socket cookie in eBPF · 91b8270f
      Chenbo Feng authored 
      Retrieve the socket cookie generated by sock_gen_cookie() from a sk_buff
with a known socket. Generates a new cookie if one was not yet set.If
the socket pointer inside sk_buff is NULL, 0 is returned. The helper
function coud be useful in monitoring per socket networking traffic
statistics and provide a unique socket identifier per namespace.
Acked-by: default avatarDaniel Borkmann <daniel@iogearbox.net>
Acked-by: default avatarAlexei Starovoitov <ast@kernel.org>
Acked-by: default avatarWillem de Bruijn <willemb@google.com>
Signed-off-by: default avatarChenbo Feng <fengc@google.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      91b8270f
  3. 23 Mar, 2017 33 commits
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