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Simplify maintenance of ipv4_net_table by using math to point the per
net sysctls into the appropriate struct net, instead of manually
reassinging all of the variables into hard coded table slots.
Signed-off-by: "Eric W. Biederman" <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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Replace the pointers in struct cg_proto with actual data fields and kill
struct tcp_memcontrol as it is not fully redundant.
This removes a confusing, unnecessary layer of abstraction.
Signed-off-by: "Eric W. Biederman" <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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The code that is implemented is per memory cgroup not per netns, and
having per netns bits is just confusing. Remove the per netns bits to
make it easier to see what is really going on.
Signed-off-by: "Eric W. Biederman" <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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The code is broken and does not constrain sysctl_tcp_mem as
tcp_update_limit does. With the result that it allows the cgroup tcp
memory limits to be bypassed.
The semantics are broken as the settings are not per netns and are in a
per netns table, and instead looks at current.
Since the code is broken in both design and implementation and does not
implement the functionality for which it was written remove it.
Signed-off-by: "Eric W. Biederman" <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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This function is never called. Remove it.
Signed-off-by: "Eric W. Biederman" <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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Now when rt6_nexthop() can return nexthop address we can use it
for proper nexthop comparison of directly connected destinations.
For more information refer to commit bbb5823cf742a7
("netfilter: nf_conntrack: fix rt_gateway checks for H.323 helper").
Signed-off-by: Julian Anastasov <[email protected]>
Acked-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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Make sure rt6i_gateway contains nexthop information in
all routes returned from lookup or when routes are directly
attached to skb for generated ICMP packets.
The effect of this patch should be a faster version of
rt6_nexthop() and the consideration of local addresses as
nexthop.
Signed-off-by: Julian Anastasov <[email protected]>
Acked-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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There is no access to chan->sk in L2CAP core now. This change marks the
end of the task of splitting L2CAP between Core and Socket, thus sk is now
gone from struct l2cap_chan.
Signed-off-by: Gustavo Padovan <[email protected]>
Signed-off-by: Marcel Holtmann <[email protected]>
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Instead of accessing skb->sk in L2CAP core we now compare the channel
a skb belongs to and not send it back if the channel is same. This change
removes another struct socket usage from L2CAP core.
Signed-off-by: Gustavo Padovan <[email protected]>
Signed-off-by: Marcel Holtmann <[email protected]>
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Adding the channel to the skb private data makes possible to us know which
channel the skb we have came from.
Signed-off-by: Gustavo Padovan <[email protected]
Signed-off-by: Marcel Holtmann <[email protected]>
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The parent socket is not used inside the L2CAP core anymore. We only lock
it to indirect access through the new_connection() callback. The hold of
the socket lock was moved to the new_connection() callback.
Inside L2CAP core the channel lock is now used in l2cap_le_conn_ready()
and l2cap_conn_ready() to protect the execution of these two functions
during the handling of new incoming connections.
This change remove the socket lock usage from L2CAP core while keeping
the code safe against race conditions.
Signed-off-by: Gustavo Padovan <[email protected]>
Signed-off-by: Marcel Holtmann <[email protected]>
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This simplify and make safer the state change handling inside l2cap_core.c.
we got rid of __l2cap_state_change(). And l2cap_state_change() doesn't lock
the socket anymore, instead the socket is locked inside the ops callback for
state change in l2cap_sock.c.
It makes the code safer because in some we were using a unlocked version,
and now we are calls to l2cap_state_change(), when dealing with sockets, use
the locked version.
Signed-off-by: Gustavo Padovan <[email protected]>
Signed-off-by: Marcel Holtmann <[email protected]>
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In both places that we use the defer callback the socket lock is held for
a indirect sk access inside __l2cap_change_state() and chan->ops->defer(),
all the rest of the code between lock_sock() and release_sock() is
already protected by the channel lock and won't be affected by this
change.
We now use l2cap_change_state(), the locked version of the change state
function, and the defer callback does the locking itself now. This does
not affect other uses of the defer callback.
Signed-off-by: Gustavo Padovan <[email protected]>
Signed-off-by: Marcel Holtmann <[email protected]>
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In the process of removing socket usage from L2CAP we now access the L2CAP
socket from the data member of struct l2cap_chan. For the L2CAP socket
user the data member points to the L2CAP socket.
Signed-off-by: Gustavo Padovan <[email protected]>
Signed-off-by: Marcel Holtmann <[email protected]>
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It is a leftover from the recent effort of remove sk usage from L2CAP
core.
Signed-off-by: Gustavo Padovan <[email protected]>
Signed-off-by: Marcel Holtmann <[email protected]>
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The current "fast connectable" feature is BR/EDR-only, so add a proper
check for BR/EDR support before proceeding with the associated HCI
commands.
Signed-off-by: Johan Hedberg <[email protected]>
Signed-off-by: Marcel Holtmann <[email protected]>
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The timestamp wasn't updated after transitioning
to the NL80211_DFS_USABLE state after NOP time.
Signed-off-by: Michal Kazior <[email protected]>
Signed-off-by: Johannes Berg <[email protected]>
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The timeout was not properly converted from msecs
to jiffies. As a result channel transition to
NL80211_DFS_USABLE was delayed depending on
CONFIG_HZ configuration, e.g. HZ=100 would delay
the NOP from 30 minutes to 300 minutes.
Signed-off-by: Michal Kazior <[email protected]>
Signed-off-by: Johannes Berg <[email protected]>
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Since rdev->sched_scan_req is dereferenced outside the
lock protecting it, this might be done at the wrong
time, causing crashes. Move the dereference to where
it should be - inside the RTNL locked section.
Cc: [email protected] [3.8+]
Reviewed-by: Emmanuel Grumbach <[email protected]>
Signed-off-by: Johannes Berg <[email protected]>
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It does not make sense to queue retransmitted packets if the
original packet is still in some queue of this host. So add
a check to xdst_queue_output() and drop the packet if the
original packet is not yet sent.
Signed-off-by: Steffen Klassert <[email protected]>
Acked-by: Eric Dumazet <[email protected]>
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scratches are per cpu, we can use vmalloc_node() for proper
NUMA affinity.
Signed-off-by: Eric Dumazet <[email protected]>
Acked-by: Herbert Xu <[email protected]>
Signed-off-by: Steffen Klassert <[email protected]>
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This patch updates the Set Discoverable management command to also be
applicable for LE. In particular this affects the advertising flags
where we can say "general discoverable" or "limited discoverable".
Since the device flags may not be up-to-date when the advertising data
is written this patch introduces a get_adv_discov_flags() helper
function which also looks at any pending mgmt commands (a pending
set_discoverable would be the exception when the flags are not yet
correct).
The patch also adds HCI_DISCOVERABLE flag clearing to the
mgmt_discoverable_timeout function, since the code was previously
relying on the mgmt_discoverable callback to handle this, which is only
called for the BR/EDR-only HCI_Write_Scan_Enable command.
Signed-off-by: Johan Hedberg <[email protected]>
Signed-off-by: Marcel Holtmann <[email protected]>
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We'll soon be introducing also LE support for the Set Discoverable
management command, so move the HCI_LIMITED_DISCOVERABLE flag clearing
and setting out from the if-branch that is only used for a BR/EDR
specific HCI command.
Signed-off-by: Johan Hedberg <[email protected]>
Signed-off-by: Marcel Holtmann <[email protected]>
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We should only send the HCI_Write_Scan_Enable command from
mgmt_set_powered_failed() when BR/EDR support is enabled. This is
particularly important when the discoverable setting is also tied to LE.
Signed-off-by: Johan Hedberg <[email protected]>
Signed-off-by: Marcel Holtmann <[email protected]>
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We will soon need this function for updating the advertising data, so
move it higher up in mgmt.c to avoid a forward declaration.
Signed-off-by: Johan Hedberg <[email protected]>
Signed-off-by: Marcel Holtmann <[email protected]>
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It is possible that the Set Connectable management command doesn't cause
any HCI commands to send (such as when BR/EDR is disabled). We can't
just send a response to user space in this case but must also update the
necessary device flags and settings. This patch fixes the issue by using
the recently introduced set_connectable_update_settings function.
Signed-off-by: Johan Hedberg <[email protected]>
Signed-off-by: Marcel Holtmann <[email protected]>
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We will need to directly update the device flags and notify user space
of the new settings not just when we're powered off but also if it turns
out that there are no HCI commands to send (which can happen in
particular when BR/EDR is disabled). Since this is a considerable amount
of code, refactor it to a separate function so it can be reused for the
"no HCI commands to send" case.
Signed-off-by: Johan Hedberg <[email protected]>
Signed-off-by: Marcel Holtmann <[email protected]>
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We shouldn't be sending the HCI_Write_Class_Of_Device command when
BR/EDR is disabled since this is a BR/EDR-only command.
Signed-off-by: Johan Hedberg <[email protected]>
Signed-off-by: Marcel Holtmann <[email protected]>
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It's better to check for the device flag instead of device features so
that we avoid unnecessary HCI commands when the feature is supported but
disabled (i.e. the flag is unset).
Signed-off-by: Johan Hedberg <[email protected]>
Signed-off-by: Marcel Holtmann <[email protected]>
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It's better to check for the device flag instead of device features so
that we avoid unnecessary HCI commands when the feature is supported but
disabled (i.e. the flag is unset).
Signed-off-by: Johan Hedberg <[email protected]>
Signed-off-by: Marcel Holtmann <[email protected]>
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Antonio Quartulli says:
====================
this is another batch intended for net-next/linux-3.13.
This pull request is a bit bigger than usual, but 6 patches are very small
(three of them are about email updates)..
Patch 1 is fixing a previous merge conflict resolution that went wrong
(I realised that only now while checking other patches..).
Patches from 2 to 4 that are updating our emails in all the proper files
(Documentation/, headers and MAINTAINERS).
Patches 5, 6 and 7 are bringing a big improvement to the TranslationTable
component: it is now able to group non-mesh clients based on the VLAN they
belong to. In this way a lot a new enhancements are now possible thanks to the
fact that each batman-adv behaviour can be applied on a per VLAN basis.
And, of course, in patches from 8 to 12 you have some of the enhancements I was
talking about:
- make the batman-Gateway selection VLAN dependent
- make DAT (Distributed ARP Table) group ARP entries on a VLAN basis (this
allows DAT to work even when the admin decided to use the same IP subnet on
different VLANs)
- make the AP-Isolation behaviour switchable on each VLAN independently
- export VLAN specific attributes via sysfs. Switches like the AP-Isolation are
now exported once per VLAN (backward compatibility of the sysfs interface has
been preserved)
Patches 13 and 14 are small code cleanups.
Patch 15 is a minor improvement in the TT locking mechanism.
Patches 16 and 17 are other enhancements to the TT component. Those allow a
node to parse a "non-mesh client announcement message" and accept only those
TT entries belonging to certain VLANs.
Patch 18 exploits this parse&accept mechanism to make the Bridge Loop Avoidance
component reject only TT entries connected to the VLAN where it is operating.
Previous to this change, BLA was rejecting all the entries coming from any other
Backbone node, regardless of the VLAN (for more details about how the Bridge
Loop Avoidance works please check [1]).
[1] http://www.open-mesh.org/projects/batman-adv/wiki/Bridge-loop-avoidance-II
====================
Signed-off-by: David S. Miller <[email protected]>
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Cc: Eric Dumazet <[email protected]>
Cc: "David S. Miller" <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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Changed key initialization of tcp_fastopen cookies to net_get_random_once.
If the user sets a custom key net_get_random_once must be called at
least once to ensure we don't overwrite the user provided key when the
first cookie is generated later on.
Cc: Yuchung Cheng <[email protected]>
Cc: Eric Dumazet <[email protected]>
Cc: "David S. Miller" <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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Initialize the ehash and ipv6_hash_secrets with net_get_random_once.
Each compilation unit gets its own secret now:
ipv4/inet_hashtables.o
ipv4/udp.o
ipv6/inet6_hashtables.o
ipv6/udp.o
rds/connection.o
The functions still get inlined into the hashing functions. In the fast
path we have at most two (needed in ipv6) if (unlikely(...)).
Cc: Eric Dumazet <[email protected]>
Cc: "David S. Miller" <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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net_get_random_once
This patch splits the secret key for syncookies for ipv4 and ipv6 and
initializes them with net_get_random_once. This change was the reason I
did this series. I think the initialization of the syncookie_secret is
way to early.
Cc: Florian Westphal <[email protected]>
Cc: Eric Dumazet <[email protected]>
Cc: "David S. Miller" <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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net_get_random_once is a new macro which handles the initialization
of secret keys. It is possible to call it in the fast path. Only the
initialization depends on the spinlock and is rather slow. Otherwise
it should get used just before the key is used to delay the entropy
extration as late as possible to get better randomness. It returns true
if the key got initialized.
The usage of static_keys for net_get_random_once is a bit uncommon so
it needs some further explanation why this actually works:
=== In the simple non-HAVE_JUMP_LABEL case we actually have ===
no constrains to use static_key_(true|false) on keys initialized with
STATIC_KEY_INIT_(FALSE|TRUE). So this path just expands in favor of
the likely case that the initialization is already done. The key is
initialized like this:
___done_key = { .enabled = ATOMIC_INIT(0) }
The check
if (!static_key_true(&___done_key)) \
expands into (pseudo code)
if (!likely(___done_key > 0))
, so we take the fast path as soon as ___done_key is increased from the
helper function.
=== If HAVE_JUMP_LABELs are available this depends ===
on patching of jumps into the prepared NOPs, which is done in
jump_label_init at boot-up time (from start_kernel). It is forbidden
and dangerous to use net_get_random_once in functions which are called
before that!
At compilation time NOPs are generated at the call sites of
net_get_random_once. E.g. net/ipv6/inet6_hashtable.c:inet6_ehashfn (we
need to call net_get_random_once two times in inet6_ehashfn, so two NOPs):
71: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
76: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
Both will be patched to the actual jumps to the end of the function to
call __net_get_random_once at boot time as explained above.
arch_static_branch is optimized and inlined for false as return value and
actually also returns false in case the NOP is placed in the instruction
stream. So in the fast case we get a "return false". But because we
initialize ___done_key with (enabled != (entries & 1)) this call-site
will get patched up at boot thus returning true. The final check looks
like this:
if (!static_key_true(&___done_key)) \
___ret = __net_get_random_once(buf, \
expands to
if (!!static_key_false(&___done_key)) \
___ret = __net_get_random_once(buf, \
So we get true at boot time and as soon as static_key_slow_inc is called
on the key it will invert the logic and return false for the fast path.
static_key_slow_inc will change the branch because it got initialized
with .enabled == 0. After static_key_slow_inc is called on the key the
branch is replaced with a nop again.
=== Misc: ===
The helper defers the increment into a workqueue so we don't
have problems calling this code from atomic sections. A seperate boolean
(___done) guards the case where we enter net_get_random_once again before
the increment happend.
Cc: Ingo Molnar <[email protected]>
Cc: Steven Rostedt <[email protected]>
Cc: Jason Baron <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Eric Dumazet <[email protected]>
Cc: "David S. Miller" <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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This patch splits the inet6_ehashfn into separate ones in
ipv6/inet6_hashtables.o and ipv6/udp.o to ease the introduction of
seperate secrets keys later.
Cc: Eric Dumazet <[email protected]>
Cc: "David S. Miller" <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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This duplicates a bit of code but let's us easily introduce
separate secret keys later. The separate compilation units are
ipv4/inet_hashtabbles.o, ipv4/udp.o and rds/connection.o.
Cc: Eric Dumazet <[email protected]>
Cc: "David S. Miller" <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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Now inet_gso_segment() is stackable, its relatively easy to
implement GSO/TSO support for IPIP
Performance results, when segmentation is done after tunnel
device (as no NIC is yet enabled for TSO IPIP support) :
Before patch :
lpq83:~# ./netperf -H 7.7.9.84 -Cc
MIGRATED TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 7.7.9.84 () port 0 AF_INET
Recv Send Send Utilization Service Demand
Socket Socket Message Elapsed Send Recv Send Recv
Size Size Size Time Throughput local remote local remote
bytes bytes bytes secs. 10^6bits/s % S % S us/KB us/KB
87380 16384 16384 10.00 3357.88 5.09 3.70 2.983 2.167
After patch :
lpq83:~# ./netperf -H 7.7.9.84 -Cc
MIGRATED TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 7.7.9.84 () port 0 AF_INET
Recv Send Send Utilization Service Demand
Socket Socket Message Elapsed Send Recv Send Recv
Size Size Size Time Throughput local remote local remote
bytes bytes bytes secs. 10^6bits/s % S % S us/KB us/KB
87380 16384 16384 10.00 7710.19 4.52 6.62 1.152 1.687
Signed-off-by: Eric Dumazet <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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In order to support GSO on IPIP, we need to make
inet_gso_segment() stackable.
It should not assume network header starts right after mac
header.
Signed-off-by: Eric Dumazet <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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This patch makes gre_handle_offloads() more generic
and rename it to iptunnel_handle_offloads()
This will be used to add GSO/TSO support to IPIP tunnels.
Signed-off-by: Eric Dumazet <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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While implementing GSO/TSO support for IPIP, I found skb_segment()
was assuming network header was immediately following mac header.
Its not really true in the case inet_gso_segment() is stacked :
By the time tcp_gso_segment() is called, network header points
to the inner IP header.
Let's instead assume nothing and pick the current offsets found in
original skb, we have skb_headers_offset_update() helper for that.
Also move the csum_start update inside skb_headers_offset_update()
Signed-off-by: Eric Dumazet <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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Now, if user application does:
sendto len<mtu flag MSG_MORE
sendto len>mtu flag 0
The skb is not treated as fragmented one because it is not initialized
that way. So move the initialization to fix this.
introduced by:
commit e89e9cf539a28df7d0eb1d0a545368e9920b34ac "[IPv4/IPv6]: UFO Scatter-gather approach"
Signed-off-by: Jiri Pirko <[email protected]>
Acked-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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Now, if user application does:
sendto len<mtu flag MSG_MORE
sendto len>mtu flag 0
The skb is not treated as fragmented one because it is not initialized
that way. So move the initialization to fix this.
introduced by:
commit e89e9cf539a28df7d0eb1d0a545368e9920b34ac "[IPv4/IPv6]: UFO Scatter-gather approach"
Signed-off-by: Jiri Pirko <[email protected]>
Acked-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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if up->pending != 0 dontfrag is left with default value -1. That
causes that application that do:
sendto len>mtu flag MSG_MORE
sendto len>mtu flag 0
will receive EMSGSIZE errno as the result of the second sendto.
This patch fixes it by respecting IPV6_DONTFRAG socket option.
introduced by:
commit 4b340ae20d0e2366792abe70f46629e576adaf5e "IPv6: Complete IPV6_DONTFRAG support"
Signed-off-by: Jiri Pirko <[email protected]>
Acked-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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ipv6_gso_send_check() and ipv6_gso_segment() are called by
skb_mac_gso_segment() under rcu lock, no need to use
rcu_read_lock() / rcu_read_unlock()
Signed-off-by: Eric Dumazet <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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There are a mix of function prototypes with and without extern
in the kernel sources. Standardize on not using extern for
function prototypes.
Function prototypes don't need to be written with extern.
extern is assumed by the compiler. Its use is as unnecessary as
using auto to declare automatic/local variables in a block.
Signed-off-by: Joe Perches <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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There are a mix of function prototypes with and without extern
in the kernel sources. Standardize on not using extern for
function prototypes.
Function prototypes don't need to be written with extern.
extern is assumed by the compiler. Its use is as unnecessary as
using auto to declare automatic/local variables in a block.
Signed-off-by: Joe Perches <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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There are a mix of function prototypes with and without extern
in the kernel sources. Standardize on not using extern for
function prototypes.
Function prototypes don't need to be written with extern.
extern is assumed by the compiler. Its use is as unnecessary as
using auto to declare automatic/local variables in a block.
Signed-off-by: Joe Perches <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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There are a mix of function prototypes with and without extern
in the kernel sources. Standardize on not using extern for
function prototypes.
Function prototypes don't need to be written with extern.
extern is assumed by the compiler. Its use is as unnecessary as
using auto to declare automatic/local variables in a block.
Signed-off-by: Joe Perches <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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