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  1. 29 10月, 2009 4 次提交
  3. 28 10月, 2009 3 次提交
  5. 27 10月, 2009 1 次提交
    • E
      vlan: allow null VLAN ID to be used · 05423b24
      由 Eric Dumazet 提交于 
      We currently use a 16 bit field (vlan_tci) to store VLAN ID/PRIO on a skb.

Null value is used as a special value, meaning vlan tagging not enabled.
This forbids use of null vlan ID.

As pointed by David, some drivers use the 3 high order bits (PRIO)

As VLAN ID is 12 bits, we can use the remaining bit (CFI) as a flag, and
allow null VLAN ID.

In case future code really wants to use VLAN_CFI_MASK, we'll have to use
a bit outside of vlan_tci.

#define VLAN_PRIO_MASK         0xe000 /* Priority Code Point */
#define VLAN_PRIO_SHIFT        13
#define VLAN_CFI_MASK          0x1000 /* Canonical Format Indicator */
#define VLAN_TAG_PRESENT       VLAN_CFI_MASK
#define VLAN_VID_MASK          0x0fff /* VLAN Identifier */
Reported-by: NGertjan Hofman <gertjan_hofman@yahoo.com>
Signed-off-by: NEric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      05423b24
  7. 23 10月, 2009 1 次提交
  9. 20 10月, 2009 3 次提交
  11. 19 10月, 2009 1 次提交
    • E
      inet: rename some inet_sock fields · c720c7e8
      由 Eric Dumazet 提交于 
      In order to have better cache layouts of struct sock (separate zones
for rx/tx paths), we need this preliminary patch.

Goal is to transfert fields used at lookup time in the first
read-mostly cache line (inside struct sock_common) and move sk_refcnt
to a separate cache line (only written by rx path)

This patch adds inet_ prefix to daddr, rcv_saddr, dport, num, saddr,
sport and id fields. This allows a future patch to define these
fields as macros, like sk_refcnt, without name clashes.
Signed-off-by: NEric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      c720c7e8
  13. 14 10月, 2009 1 次提交
  15. 13 10月, 2009 4 次提交
    • W
      can: make the number of echo skb's configurable · a6e4bc53
      由 Wolfgang Grandegger 提交于 
      This patch allows the CAN controller driver to define the number of echo
skb's used for the local loopback (echo), as suggested by Kurt Van
Dijck, with the function:

  struct net_device *alloc_candev(int sizeof_priv,
                                  unsigned int echo_skb_max);

The CAN drivers have been adapted accordingly. For the ems_usb driver,
as suggested by Sebastian Haas, the number of echo skb's has been
increased to 10, which improves the transmission performance a lot.
Signed-off-by: NWolfgang Grandegger <wg@grandegger.com>
Signed-off-by: NKurt Van Dijck <kurt.van.dijck@eia.be>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      a6e4bc53
    • E
      net: Add netdev_alloc_skb_ip_align() helper · 61321bbd
      由 Eric Dumazet 提交于 
      Instead of hardcoding NET_IP_ALIGN stuff in various network drivers,
we can add a helper around netdev_alloc_skb()
Signed-off-by: NEric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      61321bbd
    • A
      net: Introduce recvmmsg socket syscall · a2e27255
      由 Arnaldo Carvalho de Melo 提交于 
      Meaning receive multiple messages, reducing the number of syscalls and
net stack entry/exit operations.

Next patches will introduce mechanisms where protocols that want to
optimize this operation will provide an unlocked_recvmsg operation.

This takes into account comments made by:

. Paul Moore: sock_recvmsg is called only for the first datagram,
  sock_recvmsg_nosec is used for the rest.

. Caitlin Bestler: recvmmsg now has a struct timespec timeout, that
  works in the same fashion as the ppoll one.

  If the underlying protocol returns a datagram with MSG_OOB set, this
  will make recvmmsg return right away with as many datagrams (+ the OOB
  one) it has received so far.

. Rémi Denis-Courmont & Steven Whitehouse: If we receive N < vlen
  datagrams and then recvmsg returns an error, recvmmsg will return
  the successfully received datagrams, store the error and return it
  in the next call.

This paves the way for a subsequent optimization, sk_prot->unlocked_recvmsg,
where we will be able to acquire the lock only at batch start and end, not at
every underlying recvmsg call.
Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      a2e27255
    • N
      net: Generalize socket rx gap / receive queue overflow cmsg · 3b885787
      由 Neil Horman 提交于 
      Create a new socket level option to report number of queue overflows

Recently I augmented the AF_PACKET protocol to report the number of frames lost
on the socket receive queue between any two enqueued frames.  This value was
exported via a SOL_PACKET level cmsg.  AFter I completed that work it was
requested that this feature be generalized so that any datagram oriented socket
could make use of this option.  As such I've created this patch, It creates a
new SOL_SOCKET level option called SO_RXQ_OVFL, which when enabled exports a
SOL_SOCKET level cmsg that reports the nubmer of times the sk_receive_queue
overflowed between any two given frames.  It also augments the AF_PACKET
protocol to take advantage of this new feature (as it previously did not touch
sk->sk_drops, which this patch uses to record the overflow count).  Tested
successfully by me.

Notes:

1) Unlike my previous patch, this patch simply records the sk_drops value, which
is not a number of drops between packets, but rather a total number of drops.
Deltas must be computed in user space.

2) While this patch currently works with datagram oriented protocols, it will
also be accepted by non-datagram oriented protocols. I'm not sure if thats
agreeable to everyone, but my argument in favor of doing so is that, for those
protocols which aren't applicable to this option, sk_drops will always be zero,
and reporting no drops on a receive queue that isn't used for those
non-participating protocols seems reasonable to me.  This also saves us having
to code in a per-protocol opt in mechanism.

3) This applies cleanly to net-next assuming that commit
97775007 (my af packet cmsg patch) is reverted
Signed-off-by: NNeil Horman <nhorman@tuxdriver.com>
Signed-off-by: NEric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      3b885787
  17. 12 10月, 2009 1 次提交
  19. 09 10月, 2009 1 次提交
    • J
      ipv6: Fix the size overflow of addrconf_sysctl array · e0e6f55d
      由 Jin Dongming 提交于 
      (This patch fixes bug of commit f7734fdf
 title "make TLLAO option for NA packets configurable")

When the IPV6 conf is used, the function sysctl_set_parent is called and the
array addrconf_sysctl is used as a parameter of the function.

The above patch added new conf "force_tllao" into the array addrconf_sysctl,
but the size of the array was not modified, the static allocated size is
DEVCONF_MAX + 1 but the real size is DEVCONF_MAX + 2, so the problem is
that the function sysctl_set_parent accessed wrong address.

I got the following information.
Call Trace:
    [<ffffffff8106085d>] sysctl_set_parent+0x29/0x3e
    [<ffffffff8106085d>] sysctl_set_parent+0x29/0x3e
    [<ffffffff8106085d>] sysctl_set_parent+0x29/0x3e
    [<ffffffff8106085d>] sysctl_set_parent+0x29/0x3e
    [<ffffffff8106085d>] sysctl_set_parent+0x29/0x3e
    [<ffffffff810622d5>] __register_sysctl_paths+0xde/0x272
    [<ffffffff8110892d>] ? __kmalloc_track_caller+0x16e/0x180
    [<ffffffffa00cfac3>] ? __addrconf_sysctl_register+0xc5/0x144 [ipv6]
    [<ffffffff8141f2c9>] register_net_sysctl_table+0x48/0x4b
    [<ffffffffa00cfaf5>] __addrconf_sysctl_register+0xf7/0x144 [ipv6]
    [<ffffffffa00cfc16>] addrconf_init_net+0xd4/0x104 [ipv6]
    [<ffffffff8139195f>] setup_net+0x35/0x82
    [<ffffffff81391f6c>] copy_net_ns+0x76/0xe0
    [<ffffffff8107ad60>] create_new_namespaces+0xf0/0x16e
    [<ffffffff8107afee>] copy_namespaces+0x65/0x9f
    [<ffffffff81056dff>] copy_process+0xb2c/0x12c3
    [<ffffffff810576e1>] do_fork+0x14b/0x2d2
    [<ffffffff8107ac4e>] ? up_read+0xe/0x10
    [<ffffffff81438e73>] ? do_page_fault+0x27a/0x2aa
    [<ffffffff8101044b>] sys_clone+0x28/0x2a
    [<ffffffff81011fb3>] stub_clone+0x13/0x20
    [<ffffffff81011c72>] ? system_call_fastpath+0x16/0x1b

And the information of IPV6 in .config is as following.
IPV6 in .config:
    CONFIG_IPV6=m
    CONFIG_IPV6_PRIVACY=y
    CONFIG_IPV6_ROUTER_PREF=y
    CONFIG_IPV6_ROUTE_INFO=y
    CONFIG_IPV6_OPTIMISTIC_DAD=y
    CONFIG_IPV6_MIP6=m
    CONFIG_IPV6_SIT=m
    # CONFIG_IPV6_SIT_6RD is not set
    CONFIG_IPV6_NDISC_NODETYPE=y
    CONFIG_IPV6_TUNNEL=m
    CONFIG_IPV6_MULTIPLE_TABLES=y
    CONFIG_IPV6_SUBTREES=y
    CONFIG_IPV6_MROUTE=y
    CONFIG_IPV6_PIMSM_V2=y
    # CONFIG_IP_VS_IPV6 is not set
    CONFIG_NF_CONNTRACK_IPV6=m
    CONFIG_IP6_NF_MATCH_IPV6HEADER=m

I confirmed this patch fixes this problem.
Signed-off-by: NJin Dongming <jin.dongming@np.css.fujitsu.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      e0e6f55d
  21. 08 10月, 2009 5 次提交
  23. 07 10月, 2009 5 次提交
    • S
      dcb: data center bridging ops should be r/o · 32953543
      由 Stephen Hemminger 提交于 
      The data center bridging ops structure can be const
Signed-off-by: NStephen Hemminger <shemminger@vyatta.com>
Acked-by: NPeter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      32953543
    • O
      make TLLAO option for NA packets configurable · f7734fdf
      由 Octavian Purdila 提交于 
      On Friday 02 October 2009 20:53:51 you wrote:

> This is good although I would have shortened the name.

Ah, I knew I forgot something :) Here is v4.

tavi

>From 24d96d825b9fa832b22878cc6c990d5711968734 Mon Sep 17 00:00:00 2001
From: Octavian Purdila <opurdila@ixiacom.com>
Date: Fri, 2 Oct 2009 00:51:15 +0300
Subject: [PATCH] ipv6: new sysctl for sending TLLAO with unicast NAs

Neighbor advertisements responding to unicast neighbor solicitations
did not include the target link-layer address option. This patch adds
a new sysctl option (disabled by default) which controls whether this
option should be sent even with unicast NAs.

The need for this arose because certain routers expect the TLLAO in
some situations even as a response to unicast NS packets.

Moreover, RFC 2461 recommends sending this to avoid a race condition
(section 4.4, Target link-layer address)
Signed-off-by: NCosmin Ratiu <cratiu@ixiacom.com>
Signed-off-by: NOctavian Purdila <opurdila@ixiacom.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      f7734fdf
    • B
      ethtool: Add reset operation · d73d3a8c
      由 Ben Hutchings 提交于 
      After updating firmware stored in flash, users may wish to reset the
relevant hardware and start the new firmware immediately.  This should
not be completely automatic as it may be disruptive.

A selective reset may also be useful for debugging or diagnostics.

This adds a separate reset operation which takes flags indicating the
components to be reset.  Drivers are allowed to reset only a subset of
those requested, and must indicate the actual subset.  This allows the
use of generic component masks and some future expansion.
Signed-off-by: NBen Hutchings <bhutchings@solarflare.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      d73d3a8c
    • Y
      ipv6 sit: 6rd (IPv6 Rapid Deployment) Support. · fa857afc
      由 YOSHIFUJI Hideaki / 吉藤英明 提交于 
      IPv6 Rapid Deployment (6rd; draft-ietf-softwire-ipv6-6rd) builds upon
mechanisms of 6to4 (RFC3056) to enable a service provider to rapidly
deploy IPv6 unicast service to IPv4 sites to which it provides
customer premise equipment.  Like 6to4, it utilizes stateless IPv6 in
IPv4 encapsulation in order to transit IPv4-only network
infrastructure.  Unlike 6to4, a 6rd service provider uses an IPv6
prefix of its own in place of the fixed 6to4 prefix.

With this option enabled, the SIT driver offers 6rd functionality by
providing additional ioctl API to configure the IPv6 Prefix for in
stead of static 2002::/16 for 6to4.

Original patch was done by Alexandre Cassen <acassen@freebox.fr>
based on old Internet-Draft.
Signed-off-by: NYOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      fa857afc
    • I
      add vif using local interface index instead of IP · ee5e81f0
      由 Ilia K 提交于 
      When routing daemon wants to enable forwarding of multicast traffic it
performs something like:

       struct vifctl vc = {
               .vifc_vifi  = 1,
               .vifc_flags = 0,
               .vifc_threshold = 1,
               .vifc_rate_limit = 0,
               .vifc_lcl_addr = ip, /* <--- ip address of physical
interface, e.g. eth0 */
               .vifc_rmt_addr.s_addr = htonl(INADDR_ANY),
         };
       setsockopt(fd, IPPROTO_IP, MRT_ADD_VIF, &vc, sizeof(vc));

This leads (in the kernel) to calling  vif_add() function call which
search the (physical) device using assigned IP address:
       dev = ip_dev_find(net, vifc->vifc_lcl_addr.s_addr);

The current API (struct vifctl) does not allow to specify an
interface other way than using it's IP, and if there are more than a
single interface with specified IP only the first one will be found.

The attached patch (against 2.6.30.4) allows to specify an interface
by its index, instead of IP address:

       struct vifctl vc = {
               .vifc_vifi  = 1,
               .vifc_flags = VIFF_USE_IFINDEX,   /* NEW */
               .vifc_threshold = 1,
               .vifc_rate_limit = 0,
               .vifc_lcl_ifindex = if_nametoindex("eth0"),   /* NEW */
               .vifc_rmt_addr.s_addr = htonl(INADDR_ANY),
         };
       setsockopt(fd, IPPROTO_IP, MRT_ADD_VIF, &vc, sizeof(vc));
Signed-off-by: NIlia K. <mail4ilia@gmail.com>

=== modified file 'include/linux/mroute.h'
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      ee5e81f0
  25. 05 10月, 2009 7 次提交
    • J
      net: introduce NETDEV_POST_INIT notifier · 7ffbe3fd
      由 Johannes Berg 提交于 
      For various purposes including a wireless extensions
bugfix, we need to hook into the netdev creation before
before netdev_register_kobject(). This will also ease
doing the dev type assignment that Marcel was working
on for cfg80211 drivers w/o touching them all.
Signed-off-by: NJohannes Berg <johannes@sipsolutions.net>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      7ffbe3fd
    • M
      usbnet: Use wwan%d interface name for mobile broadband devices · e1e499ee
      由 Marcel Holtmann 提交于 
      Add support for usbnet based devices like CDC-Ether to indicate that they
are actually mobile broadband devices. In that case use wwan%d as default
interface name.
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      e1e499ee
    • B
      net: Support inclusion of <linux/socket.h> before <sys/socket.h> · 9c501935
      由 Ben Hutchings 提交于 
      The following user-space program fails to compile:

    #include <linux/socket.h>
    #include <sys/socket.h>
    int main() { return 0; }

The reason is that <linux/socket.h> tests __GLIBC__ to decide whether it
should define various structures and macros that are now defined for
user-space by <sys/socket.h>, but __GLIBC__ is not defined if no libc
headers have yet been included.

It seems safe to drop support for libc 5 now.
Signed-off-by: NBen Hutchings <ben@decadent.org.uk>
Signed-off-by: NBastian Blank <waldi@debian.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      9c501935
    • N
      af_packet: add interframe drop cmsg (v6) · 97775007
      由 Neil Horman 提交于 
      Add Ancilliary data to better represent loss information

I've had a few requests recently to provide more detail regarding frame loss
during an AF_PACKET packet capture session.  Specifically the requestors want to
see where in a packet sequence frames were lost, i.e. they want to see that 40
frames were lost between frames 302 and 303 in a packet capture file.  In order
to do this we need:

1) The kernel to export this data to user space
2) The applications to make use of it

This patch addresses item (1).  It does this by doing the following:

A) Anytime we drop a frame for which we would increment po->stats.tp_drops, we
also no increment a stats called po->stats.tp_gap.

B) Every time we successfully enqueue a frame to sk_receive_queue, we record the
value of po->stats.tp_gap in skb->mark.  skb->cb would nominally be the place to
record this, but since all the space there is used up, we're overloading
skb->mark.  Its safe to do since any enqueued packet is guaranteed to be
unshared at this point, and skb->mark isn't used for anything else in the rx
path to the application.  After we record tp_gap in the skb, we zero
po->stats.tp_gap.  This allows us to keep a counter of the number of frames lost
between any two enqueued packets

C) When the application goes to dequeue a frame from the packet socket, we look
at skb->mark for that frame.  If it is non-zero, we add a cmsg chunk to the
msghdr of level SOL_PACKET and type PACKET_GAPDATA.  Its a 32 bit integer that
represents the number of frames lost between this packet and the last previous
frame received.

Note there is a chance that if there is frame loss after a receive, and then the
socket is closed, some gap data might be lost.  This is covered by the use of
the PACKET_AUXDATA socket option, which gives total loss data.  With a bit of
math, the final gap can be determined that way.

I've tested this patch myself, and it works well.
Signed-off-by: NNeil Horman <nhorman@tuxdriver.com>
Signed-off-by: NEric Dumazet <eric.dumazet@gmail.com>

 include/linux/if_packet.h |    2 ++
 net/packet/af_packet.c    |   33 +++++++++++++++++++++++++++++++++
 2 files changed, 35 insertions(+)
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      97775007
    • B
      ethtool: Remove support for obsolete string query operations · a9828ec6
      由 Ben Hutchings 提交于 
      The in-tree implementations have all been converted to
get_sset_count().
Signed-off-by: NBen Hutchings <bhutchings@solarflare.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      a9828ec6
    • A
      headers: remove sched.h from poll.h · a99bbaf5
      由 Alexey Dobriyan 提交于 
      Signed-off-by: NAlexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      a99bbaf5
    • J
      Revert "Seperate read and write statistics of in_flight requests" · 0f78ab98
      由 Jens Axboe 提交于 
      This reverts commit a9327cac.

Corrado Zoccolo <czoccolo@gmail.com> reports:

"with 2.6.32-rc1 I started getting the following strange output from
"iostat -kx 2":
Linux 2.6.31bisect (et2) 	04/10/2009 	_i686_	(2 CPU)

avg-cpu:  %user   %nice %system %iowait  %steal   %idle
          10,70    0,00    3,16   15,75    0,00   70,38

Device:         rrqm/s   wrqm/s     r/s     w/s    rkB/s    wkB/s
avgrq-sz avgqu-sz   await  svctm  %util
sda              18,22     0,00    0,67    0,01    14,77     0,02
43,94     0,01   10,53 39043915,03 2629219,87
sdb              60,89     9,68   50,79    3,04  1724,43    50,52
65,95     0,70   13,06 488437,47 2629219,87

avg-cpu:  %user   %nice %system %iowait  %steal   %idle
           2,72    0,00    0,74    0,00    0,00   96,53

Device:         rrqm/s   wrqm/s     r/s     w/s    rkB/s    wkB/s
avgrq-sz avgqu-sz   await  svctm  %util
sda               0,00     0,00    0,00    0,00     0,00     0,00
0,00     0,00    0,00   0,00 100,00
sdb               0,00     0,00    0,00    0,00     0,00     0,00
0,00     0,00    0,00   0,00 100,00

avg-cpu:  %user   %nice %system %iowait  %steal   %idle
           6,68    0,00    0,99    0,00    0,00   92,33

Device:         rrqm/s   wrqm/s     r/s     w/s    rkB/s    wkB/s
avgrq-sz avgqu-sz   await  svctm  %util
sda               0,00     0,00    0,00    0,00     0,00     0,00
0,00     0,00    0,00   0,00 100,00
sdb               0,00     0,00    0,00    0,00     0,00     0,00
0,00     0,00    0,00   0,00 100,00

avg-cpu:  %user   %nice %system %iowait  %steal   %idle
           4,40    0,00    0,73    1,47    0,00   93,40

Device:         rrqm/s   wrqm/s     r/s     w/s    rkB/s    wkB/s
avgrq-sz avgqu-sz   await  svctm  %util
sda               0,00     0,00    0,00    0,00     0,00     0,00
0,00     0,00    0,00   0,00 100,00
sdb               0,00     4,00    0,00    3,00     0,00    28,00
18,67     0,06   19,50 333,33 100,00

Global values for service time and utilization are garbage. For
interval values, utilization is always 100%, and service time is
higher than normal.

I bisected it down to:
[a9327cac] Seperate read and write
statistics of in_flight requests
and verified that reverting just that commit indeed solves the issue
on 2.6.32-rc1."

So until this is debugged, revert the bad commit.
Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
      0f78ab98
  27. 04 10月, 2009 1 次提交
  29. 03 10月, 2009 2 次提交