platform/kernel/linux-starfive.git
9 years agosamples: bpf: add skb->field examples and tests
Alexei Starovoitov [Fri, 13 Mar 2015 18:57:43 +0000 (11:57 -0700)]
samples: bpf: add skb->field examples and tests

- modify sockex1 example to count number of bytes in outgoing packets
- modify sockex2 example to count number of bytes and packets per flow
- add 4 stress tests that exercise 'skb->field' code path of verifier

Signed-off-by: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agobpf: allow extended BPF programs access skb fields
Alexei Starovoitov [Fri, 13 Mar 2015 18:57:42 +0000 (11:57 -0700)]
bpf: allow extended BPF programs access skb fields

introduce user accessible mirror of in-kernel 'struct sk_buff':
struct __sk_buff {
    __u32 len;
    __u32 pkt_type;
    __u32 mark;
    __u32 queue_mapping;
};

bpf programs can do:

int bpf_prog(struct __sk_buff *skb)
{
    __u32 var = skb->pkt_type;

which will be compiled to bpf assembler as:

dst_reg = *(u32 *)(src_reg + 4) // 4 == offsetof(struct __sk_buff, pkt_type)

bpf verifier will check validity of access and will convert it to:

dst_reg = *(u8 *)(src_reg + offsetof(struct sk_buff, __pkt_type_offset))
dst_reg &= 7

since skb->pkt_type is a bitfield.

Signed-off-by: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoMerge branch 'ebpf_helpers'
David S. Miller [Mon, 16 Mar 2015 01:57:30 +0000 (21:57 -0400)]
Merge branch 'ebpf_helpers'

Daniel Borkmann says:

====================
eBPF updates

Two small eBPF helper additions to better match up with ancillary
classic BPF functionality.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoebpf: add helper for obtaining current processor id
Daniel Borkmann [Sat, 14 Mar 2015 01:27:17 +0000 (02:27 +0100)]
ebpf: add helper for obtaining current processor id

This patch adds the possibility to obtain raw_smp_processor_id() in
eBPF. Currently, this is only possible in classic BPF where commit
da2033c28226 ("filter: add SKF_AD_RXHASH and SKF_AD_CPU") has added
facilities for this.

Perhaps most importantly, this would also allow us to track per CPU
statistics with eBPF maps, or to implement a poor-man's per CPU data
structure through eBPF maps.

Example function proto-type looks like:

  u32 (*smp_processor_id)(void) = (void *)BPF_FUNC_get_smp_processor_id;

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoebpf: add prandom helper for packet sampling
Daniel Borkmann [Sat, 14 Mar 2015 01:27:16 +0000 (02:27 +0100)]
ebpf: add prandom helper for packet sampling

This work is similar to commit 4cd3675ebf74 ("filter: added BPF
random opcode") and adds a possibility for packet sampling in eBPF.

Currently, this is only possible in classic BPF and useful to
combine sampling with f.e. packet sockets, possible also with tc.

Example function proto-type looks like:

  u32 (*prandom_u32)(void) = (void *)BPF_FUNC_get_prandom_u32;

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoMerge branch 'gianfar-next'
David S. Miller [Sun, 15 Mar 2015 23:56:52 +0000 (19:56 -0400)]
Merge branch 'gianfar-next'

Claudiu Manoil says:

====================
gianfar: ARM port driver updates (2/2)

The 2nd round of driver updates to make gianfar portable on ARM,
for the ARM based SoC that integrates eTSEC - "ls1021a".
The patches address the bulk of remaining endianess issues -
handling DMA fields (BD and FCB), and device tree properties.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agogianfar: Consider dts property endianess on handling
Jingchang Lu [Fri, 13 Mar 2015 08:52:32 +0000 (10:52 +0200)]
gianfar: Consider dts property endianess on handling

Use of_property_read*() to get arch endian consistent
property values. Do some refactoring in the process.

Signed-off-by: Jingchang Lu <jingchang.lu@freescale.com>
Signed-off-by: Claudiu Manoil <claudiu.manoil@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agogianfar: Make FCB access endian safe
Claudiu Manoil [Fri, 13 Mar 2015 08:36:29 +0000 (10:36 +0200)]
gianfar: Make FCB access endian safe

Use conversion macros to correctly access the BE
fields of the Rx and Tx Frame Control Block on LE CPUs.

Signed-off-by: Claudiu Manoil <claudiu.manoil@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agogianfar: Make BDs access endian safe
Claudiu Manoil [Fri, 13 Mar 2015 08:36:28 +0000 (10:36 +0200)]
gianfar: Make BDs access endian safe

Use conversion macros to correctly access the BE
fields of the Rx and Tx Buffer Descriptors on LE CPUs.

Signed-off-by: Claudiu Manoil <claudiu.manoil@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoMerge branch 'rhashtable-next'
David S. Miller [Sun, 15 Mar 2015 05:35:46 +0000 (01:35 -0400)]
Merge branch 'rhashtable-next'

Herbert Xu says:

====================
rhashtable: Fixes + cleanups + preparation for multiple rehash

Patch 1 fixes the walker so that it behaves properly even during
a resize.

Patch 2-3 are cleanups.

Patch 4-6 lays some ground work for the upcoming multiple rehashing.

This revision fixes the warning coming from the bucket_table->size
downsize and improves its changelog.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agorhashtable: Move future_tbl into struct bucket_table
Herbert Xu [Sat, 14 Mar 2015 02:57:25 +0000 (13:57 +1100)]
rhashtable: Move future_tbl into struct bucket_table

This patch moves future_tbl to open up the possibility of having
multiple rehashes on the same table.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agorhashtable: Add rehash counter to bucket_table
Herbert Xu [Sat, 14 Mar 2015 02:57:24 +0000 (13:57 +1100)]
rhashtable: Add rehash counter to bucket_table

This patch adds a rehash counter to bucket_table to indicate
the last bucket that has been rehashed.  This serves two purposes:

1. Any bucket that has been rehashed can never gain a new object.
2. If the rehash counter reaches the size of the table, the table
will forever remain empty.

This patch also downsizes bucket_table->size to an unsigned int
since we do not support sizes greater than 32 bits yet.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agorhashtable: Free bucket tables asynchronously after rehash
Herbert Xu [Sat, 14 Mar 2015 02:57:23 +0000 (13:57 +1100)]
rhashtable: Free bucket tables asynchronously after rehash

There is in fact no need to wait for an RCU grace period in the
rehash function, since all insertions are guaranteed to go into
the new table through spin locks.

This patch uses call_rcu to free the old/rehashed table at our
leisure.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agorhashtable: Move seed init into bucket_table_alloc
Herbert Xu [Sat, 14 Mar 2015 02:57:22 +0000 (13:57 +1100)]
rhashtable: Move seed init into bucket_table_alloc

It seems that I have already made every rehash redo the random
seed even though my commit message indicated otherwise :)

Since we have already taken that step, this patch goes one step
further and moves the seed initialisation into bucket_table_alloc.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agorhashtable: Use SINGLE_DEPTH_NESTING
Herbert Xu [Sat, 14 Mar 2015 02:57:21 +0000 (13:57 +1100)]
rhashtable: Use SINGLE_DEPTH_NESTING

We only nest one level deep there is no need to roll our own
subclasses.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agorhashtable: Fix walker behaviour during rehash
Herbert Xu [Sat, 14 Mar 2015 02:57:20 +0000 (13:57 +1100)]
rhashtable: Fix walker behaviour during rehash

Previously whenever the walker encountered a resize it simply
snaps back to the beginning and starts again.  However, this only
works if the rehash started and completed while the walker was
idle.

If the walker attempts to restart while the rehash is still ongoing,
we may miss objects that we shouldn't have.

This patch fixes this by making the walker walk the old table
followed by the new table just like all other readers.  If a
rehash is detected we will still signal our caller of the fact
so they can prepare for duplicates but we will simply continue
the walk onto the new table after the old one is finished either
by us or by the rehasher.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agonet: dsa: do not use slave MII bus for fixed PHYs
Florian Fainelli [Sat, 14 Mar 2015 20:21:59 +0000 (13:21 -0700)]
net: dsa: do not use slave MII bus for fixed PHYs

Commit cd28a1a9baee7 ("net: dsa: fully divert PHY reads/writes if
requested") introduced a check for particular PHYs that need to be
accessed using the slave MII bus created by DSA, but this check was too
inclusive. This would prevent fixed PHYs from being successfully
registered because those should not go through the slave MII bus created
by DSA.

Make sure we check that the PHY is not a fixed PHY to prevent that from
happening.

Fixes: cd28a1a9baee7 ("net: dsa: fully divert PHY reads/writes if requested")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoMerge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/next...
David S. Miller [Sat, 14 Mar 2015 19:08:02 +0000 (15:08 -0400)]
Merge branch 'master' of git://git./linux/kernel/git/jkirsher/next-queue

Jeff Kirsher says:

====================
Intel Wired LAN Driver Updates 2015-03-13

This series contains updates to ixgbe and ixgbevf.

Don adds additional support for X550 MAC types, which require additional
steps around enabling and disabling Rx.  Also cleans up variable type
inconsistency.

I provide a patch to allow relaxed ordering to be enabled on SPARC
architectures.  Also cleans up ixgbevf whitespace and code comments to
align the driver with networking coding standard.  Lastly cleaned up
uses of memcpy() where ether_addr_copy() could have been used.

Alex removes some dead code in the ixgbe cleanup patch.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoMerge branch 'listener_refactor_part_9'
David S. Miller [Sat, 14 Mar 2015 19:05:15 +0000 (15:05 -0400)]
Merge branch 'listener_refactor_part_9'

Eric Dumazet says:

====================
inet: tcp listener refactoring, part 9

This preliminary work pushes socket convergence a bit more:

1) request sock ir_iif is universally set

2) inet_diag can use common helpers to reduce LOC
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoinet_diag: factorize code in new inet_diag_msg_common_fill() helper
Eric Dumazet [Fri, 13 Mar 2015 22:51:12 +0000 (15:51 -0700)]
inet_diag: factorize code in new inet_diag_msg_common_fill() helper

Now the three type of sockets share a common base, we can factorize
code in inet_diag_msg_common_fill().

inet_diag_entry no longer requires saddr_storage & daddr_storage
and the extra copies.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoinet_diag: adjust inet_sk_diag_fill() bug condition
Eric Dumazet [Fri, 13 Mar 2015 22:51:11 +0000 (15:51 -0700)]
inet_diag: adjust inet_sk_diag_fill() bug condition

inet_sk_diag_fill() only copes with non timewait and non request socks

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoinet: fill request sock ir_iif for IPv4
Eric Dumazet [Fri, 13 Mar 2015 22:51:10 +0000 (15:51 -0700)]
inet: fill request sock ir_iif for IPv4

Once request socks will be in ehash table, they will need to have
a valid ir_iff field.

This is currently true only for IPv6. This patch extends support
for IPv4 as well.

This means inet_diag_fill_req() can now properly use ir_iif,
which is better for IPv6 link locals anyway, as request sockets
and established sockets will propagate consistent netlink idiag_if.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoMerge branch 'tipc-next'
David S. Miller [Sat, 14 Mar 2015 18:38:41 +0000 (14:38 -0400)]
Merge branch 'tipc-next'

Jon Maloy says:

====================
tipc: some optimizations and impovements

The commits in this series contain some relatively simple changes that
lead to better throughput across TIPC connections. We also make changes
to the implementation of link transmission queueing and priority
handling, in order to make the code more comprehensible and maintainable.

v2: Commit #2: Redesigned tipc_msg_validate() to use pskb_may_pull(),
               as per feedback from David Miller.
    Commit #3: Some cosmetic changes to tipc_msg_extract(). I tried to
               replace the unconditional skb_linearize() with calls to
               pskb_may_pull() at selected locations, but I gave up.
               First, skb_trim() requires a fully linearized buffer.
               Second, it doesn't make much sense; the whole buffer
               will end up linearized, one way or another.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agotipc: clean up handling of message priorities
Jon Paul Maloy [Fri, 13 Mar 2015 20:08:11 +0000 (16:08 -0400)]
tipc: clean up handling of message priorities

Messages transferred by TIPC are assigned an "importance priority", -an
integer value indicating how to treat the message when there is link or
destination socket congestion.

There is no separate header field for this value. Instead, the message
user values have been chosen in ascending order according to perceived
importance, so that the message user field can be used for this.

This is not a good solution. First, we have many more users than the
needed priority levels, so we end up with treating more priority
levels than necessary. Second, the user field cannot always
accurately reflect the priority of the message. E.g., a message
fragment packet should really have the priority of the enveloped
user data message, and not the priority of the MSG_FRAGMENTER user.
Until now, we have been working around this problem in different ways,
but it is now time to implement a consistent way of handling such
priorities, although still within the constraint that we cannot
allocate any more bits in the regular data message header for this.

In this commit, we define a new priority level, TIPC_SYSTEM_IMPORTANCE,
that will be the only one used apart from the four (lower) user data
levels. All non-data messages map down to this priority. Furthermore,
we take some free bits from the MSG_FRAGMENTER header and allocate
them to store the priority of the enveloped message. We then adjust
the functions msg_importance()/msg_set_importance() so that they
read/set the correct header fields depending on user type.

This small protocol change is fully compatible, because the code at
the receiving end of a link currently reads the importance level
only from user data messages, where there is no change.

Reviewed-by: Erik Hugne <erik.hugne@ericsson.com>
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agotipc: split link outqueue
Jon Paul Maloy [Fri, 13 Mar 2015 20:08:10 +0000 (16:08 -0400)]
tipc: split link outqueue

struct tipc_link contains one single queue for outgoing packets,
where both transmitted and waiting packets are queued.

This infrastructure is hard to maintain, because we need
to keep a number of fields to keep track of which packets are
sent or unsent, and the number of packets in each category.

A lot of code becomes simpler if we split this queue into a transmission
queue, where sent/unacknowledged packets are kept, and a backlog queue,
where we keep the not yet sent packets.

In this commit we do this separation.

Reviewed-by: Erik Hugne <erik.hugne@ericsson.com>
Reviewed-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agotipc: eliminate unnecessary call to broadcast ack function
Jon Paul Maloy [Fri, 13 Mar 2015 20:08:09 +0000 (16:08 -0400)]
tipc: eliminate unnecessary call to broadcast ack function

The unicast packet header contains a broadcast acknowledge sequence
number, that may need to be conveyed to the broadcast link for proper
treatment. Currently, the function tipc_rcv(), which is on the most
critical data path, calls the function tipc_bclink_acknowledge() to
have this done. This call is made for each received packet, and results
in the unconditional grabbing of the broadcast link spinlock.

This is unnecessary, since we can see directly from tipc_rcv() if
the acknowledged number differs from what has been previously acked
from the node in question. In the vast majority of cases the numbers
won't differ, and there is nothing to update.

We now make the call to tipc_bclink_acknowledge() conditional
to that the two ack values differ.

Reviewed-by: Erik Hugne <erik.hugne@ericsson.com>
Reviewed-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agotipc: extract bundled buffers by cloning instead of copying
Jon Paul Maloy [Fri, 13 Mar 2015 20:08:08 +0000 (16:08 -0400)]
tipc: extract bundled buffers by cloning instead of copying

When we currently extract a bundled buffer from a message bundle in
the function tipc_msg_extract(), we allocate a new buffer and explicitly
copy the linear data area.

This is unnecessary, since we can just clone the buffer and do
skb_pull() on the clone to move the data pointer to the correct
position.

This is what we do in this commit.

Reviewed-by: Erik Hugne <erik.hugne@ericsson.com>
Reviewed-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agotipc: eliminate unnecessary linearization of incoming buffers
Jon Paul Maloy [Fri, 13 Mar 2015 20:08:07 +0000 (16:08 -0400)]
tipc: eliminate unnecessary linearization of incoming buffers

Currently, TIPC linearizes all incoming buffers directly at reception
before passing them upwards in the stack. This is clearly a waste of
CPU resources, and must be avoided.

In this commit, we eliminate this unnecessary linearization. We still
ensure that at least the message header is linear, and that the buffer
is linearized where this is still needed, i.e. when unbundling and when
reversing messages.

In addition, we ensure that fragmented messages are validated after
reassembly before delivering them upwards in the stack.

Reviewed-by: Erik Hugne <erik.hugne@ericsson.com>
Reviewed-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agotipc: move message validation function to msg.c
Jon Paul Maloy [Fri, 13 Mar 2015 20:08:06 +0000 (16:08 -0400)]
tipc: move message validation function to msg.c

The function link_buf_validate() is in reality re-entrant and context
independent, and will in later commits be called from several locations.
Therefore, we move it to msg.c, make it outline and rename the it to
tipc_msg_validate().

We also redesign the function to make proper use of pskb_may_pull()

Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agotipc: add framework for node capabilities exchange
Jon Paul Maloy [Fri, 13 Mar 2015 20:08:05 +0000 (16:08 -0400)]
tipc: add framework for node capabilities exchange

The TIPC protocol spec has defined a 13 bit capability bitmap in
the neighbor discovery header, as a means to maintain compatibility
between different code and protocol generations. Until now this field
has been unused.

We now introduce the basic framework for exchanging capabilities
between nodes at first contact. After exchange, a peer node's
capabilities are stored as a 16 bit bitmap in struct tipc_node.

Reviewed-by: Erik Hugne <erik.hugne@ericsson.com>
Reviewed-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoMerge branch 'for-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetoot...
David S. Miller [Sat, 14 Mar 2015 18:29:45 +0000 (14:29 -0400)]
Merge branch 'for-upstream' of git://git./linux/kernel/git/bluetooth/bluetooth-next

Johan Hedberg says:

====================
Here's another set of Bluetooth & ieee802154 patches intended for 4.1:

 - Added support for QCA ROME chipset family in the btusb driver
 - at86rf230 driver fixes & cleanups
 - ieee802154 cleanups
 - Refactoring of Bluetooth mgmt API to allow new users
 - New setting for static Bluetooth address exposed to user space
 - Refactoring of hci_dev flags to remove limit of 32
 - Remove unnecessary fast-connectable setting usage restrictions
 - Fix behavior to be consistent when trying to pair already paired device
 - Service discovery corner-case fixes

Please let me know if there are any issues pulling. Thanks.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoieee802154: don't export static symbol
Julia Lawall [Wed, 11 Mar 2015 16:56:35 +0000 (17:56 +0100)]
ieee802154: don't export static symbol

The semantic patch that fixes this problem is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@r@
type T;
identifier f;
@@

static T f (...) { ... }

@@
identifier r.f;
declarer name EXPORT_SYMBOL;
@@

-EXPORT_SYMBOL(f);
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Acked-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
9 years agoat86rf230: fix volatile regmap registers
Alexander Aring [Mon, 9 Mar 2015 12:56:12 +0000 (13:56 +0100)]
at86rf230: fix volatile regmap registers

These registers are also changed by transceiver and should be volatile
for right accessing via regmap debugfs.

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
9 years agoat86rf230: add support for calibration timeout
Alexander Aring [Mon, 9 Mar 2015 12:56:11 +0000 (13:56 +0100)]
at86rf230: add support for calibration timeout

This patch adds a handling for calibration if we are 5 minutes in PLL
state. I first tried to implement the calibration functionality in
TX_ON state via register values CF_START and DCU_START, but this occurs
a one second delay at each calibration time.

An another solution to start a calibration is to switch from TRX_OFF
state into TX_ON, then a calibration is done automatically by
transceiver. This method will be used in this patch, after each transmit
of a frame we check with jiffies if the PLL is set 5 minutes without
doing a TRX_OFF->(TX_ON || RX_AACK_ON) or channel switch. The worst case
would be a transceiver in receiving mode only, but this is under normal
operation very unlikely.

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Cc: Phoebe Buckheister <phoebe.buckheister@itwm.fraunhofer.de>
Cc: Werner Almesberger <werner@almesberger.net>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
9 years agoat86rf230: replace state change sleeps with hrtimer
Alexander Aring [Mon, 9 Mar 2015 12:56:10 +0000 (13:56 +0100)]
at86rf230: replace state change sleeps with hrtimer

This patch replace the state change timing relevant sleeps with
hrtimers. Currently the sleeps are done in the complete handler of
spi_async. The relation of doing the state change timing sleep with a
timer will get the sleep functionality out of spi_async complete handler
context.

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
9 years agoat86rf230: init xtal_trim with zero
Alexander Aring [Sat, 7 Mar 2015 21:07:07 +0000 (22:07 +0100)]
at86rf230: init xtal_trim with zero

This patch initialize xtal_trim value to zero. The xtal_trim property is
an optional device tree value. Currently if no xtal_trim property is
given the xtal_trim value can be contain random data, because it's a
stack variable. This patch init the xtal_trim value to zero which is
also the default value after reset for at86rf230 transceivers.

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
9 years agomac802154: correct max sifs size handling
Alexander Aring [Wed, 4 Mar 2015 20:19:59 +0000 (21:19 +0100)]
mac802154: correct max sifs size handling

This patch fix the max sifs size correction when the
IEEE802154_HW_TX_OMIT_CKSUM flag is set. With this flag the sk_buff
doesn't contain the CRC, because the transceiver will add the CRC
while transmit.

Also add some defines for the max sifs frame size value and frame check
sequence according to 802.15.4 standard.

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Acked-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
9 years agoieee802154: remove deprecated sysfs entries
Alexander Aring [Mon, 2 Mar 2015 14:10:05 +0000 (15:10 +0100)]
ieee802154: remove deprecated sysfs entries

It's only necessary to offer the name and index, others value are
available over netlink.

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
9 years agoieee802154: change wpan-phy name to phy
Alexander Aring [Mon, 2 Mar 2015 14:10:04 +0000 (15:10 +0100)]
ieee802154: change wpan-phy name to phy

Currently the wpan_phy under /sys/class/ieee802154/ is named as
"wpan-phy#", this patch will change the name to phy. This will
introduce the same naming convention like wireless.

Note: wpan-tools users will not type "wpan-phy#" anymore, just a simple
      "phy#" is enough.

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
9 years agoieee802154: 6lowpan: fix ARPHRD to ARPHRD_6LOWPAN
Alexander Aring [Mon, 2 Mar 2015 14:10:03 +0000 (15:10 +0100)]
ieee802154: 6lowpan: fix ARPHRD to ARPHRD_6LOWPAN

Currently there exists two interface types with ARPHRD_IEEE802154. These
are the 802.15.4 interfaces and 802.15.4 6LoWPAN interfaces. This is
more a bug because some userspace applications checks on this value like
wireshark. This occurs that wireshark will always try to parse a lowpan
interface as 802.15.4 frames. With ARPHRD_6LOWPAN wireshark will parse
it as IPv6 frames which is correct.

Much applications checks on this value to readout the EUI64 mac address
which should be the same for ARPHRD_6LOWPAN. BTLE 6LoWPAN and ieee802154
6LoWPAN will share now the same ARPHRD.

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
9 years agoixgbevf: Use ether_addr_copy() instead of memcpy()
Jeff Kirsher [Sat, 14 Feb 2015 04:53:03 +0000 (04:53 +0000)]
ixgbevf: Use ether_addr_copy() instead of memcpy()

Use the macro to copy the Ethernet address instead of memcpy().

Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
9 years agoixgbevf: Fix code comments and whitespace
Jeff Kirsher [Tue, 10 Feb 2015 11:42:33 +0000 (11:42 +0000)]
ixgbevf: Fix code comments and whitespace

Fix the code comments to align with drivers/net/ code commenting style,
as well as whitespace issues.  The whitespace issues resolve checkpatch
errors, like lines exceeding 80 chars (except for strings) and the use
of tabs where possible.

CC: <kernel-team@fb.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
9 years agoixgbe: Remove IXGBE_FLAG_IN_NETPOLL since it doesn't do anything
Alexander Duyck [Wed, 25 Feb 2015 17:45:54 +0000 (17:45 +0000)]
ixgbe: Remove IXGBE_FLAG_IN_NETPOLL since it doesn't do anything

This patch removes some dead code from the cleanup path for ixgbe.

Setting and clearing the flag doesn't do anything since all we are
doing is setting the flag, scheduling NAPI, clearing the flag and
then letting netpoll do the polling cleanup.  As such it doesn't
make much sense to have it there.

This patch also removes one minor white-space error.

CC: <kernel-team@fb.com>
Signed-off-by: Alexander Duyck <alexander.h.duyck@redhat.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
9 years agoixgbe: enable relaxed ordering for SPARC
Jeff Kirsher [Fri, 13 Mar 2015 21:04:35 +0000 (14:04 -0700)]
ixgbe: enable relaxed ordering for SPARC

This patch makes sure that relaxed ordering is not disabled when
on SPARC, where it helps with performance.

CC: <kernel-team@fb.com>
CC: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Reported-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
9 years agoixgbe: cleanup make ixgbe_set_ethertype_anti_spoofing_X550 static
Don Skidmore [Fri, 13 Mar 2015 21:03:25 +0000 (14:03 -0700)]
ixgbe: cleanup make ixgbe_set_ethertype_anti_spoofing_X550 static

Correcting a mistake when I initial created this function.  I should
have made this static since it is only referenced where the function
pointer is assigned.

CC: <kernel-team@fb.com>
Signed-off-by: Don Skidmore <donald.c.skidmore@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
9 years agoixgbe: Clean up type inconsistency
Don Skidmore [Fri, 13 Mar 2015 21:01:34 +0000 (14:01 -0700)]
ixgbe: Clean up type inconsistency

Missed this when I created commit 6a14ee0cfb197 ("ixgbe: Add X550 support
function pointers").  Use a the __be* type to be consistent with how the
value is assigned.

CC: <kernel-team@fb.com>
Signed-off-by: Don Skidmore <donald.c.skidmore@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
9 years agoixgbe: add new wrapper for X550 support
Don Skidmore [Fri, 13 Mar 2015 20:54:30 +0000 (13:54 -0700)]
ixgbe: add new wrapper for X550 support

For the X550 mac type we have to do additional steps around
enabling/disabling Rx.  This patch will add a layer of indirection
around these support functions to enable this.

CC: <kernel-team@fb.com>
Signed-off-by: Don Skidmore <donald.c.skidmore@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
9 years agoMerge branch 'bcmgenet_xmit_more'
David S. Miller [Fri, 13 Mar 2015 19:52:38 +0000 (15:52 -0400)]
Merge branch 'bcmgenet_xmit_more'

Florian Fainelli says:

====================
net: bcmgenet: xmit_more support

This patch series adds xmit_more support to the GENET driver by allowing
the deferal of the producer index write to the TDMA engine.

Changes in v2:

- move the netif_tx_stop_queue check *before* updating the producer index
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agonet: bcmgenet: add support for xmit_more
Florian Fainelli [Fri, 13 Mar 2015 19:11:07 +0000 (12:11 -0700)]
net: bcmgenet: add support for xmit_more

Delay the update of the TDMA producer index unless this is the last SKB
in a batch, or the queue is already stopped. Move the check for whether
the queue should be stopped before the xmit_more check to avoid locking
the transmit queue in case there was a SKB submitted which has xmit_more
set.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agonet: bcmgenet: update ring producer index and buffer count in xmit
Florian Fainelli [Fri, 13 Mar 2015 19:11:06 +0000 (12:11 -0700)]
net: bcmgenet: update ring producer index and buffer count in xmit

There is no need to have both bcmgenet_xmit_single() and
bcmgenet_xmit_frag() perform a free_bds decrement and a prod_index
increment by one. In case one of these functions fails to map a SKB or
fragment for transmit, we will return and exit bcmgenet_xmit() with an
error.

We can therefore safely use our local copy of nr_frags to know by how
much we should decrement the number of free buffers available, and by
how much the producer count must be incremented and do this in the tail
of bcmgenet_xmit().

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Petri Gynther <pgynther@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agonet: bcmgenet: rewrite bcmgenet_rx_refill()
Petri Gynther [Thu, 12 Mar 2015 22:48:00 +0000 (15:48 -0700)]
net: bcmgenet: rewrite bcmgenet_rx_refill()

Currently, bcmgenet_desc_rx() calls bcmgenet_rx_refill() at the end of
Rx packet processing loop, after the current Rx packet has already been
passed to napi_gro_receive(). However, bcmgenet_rx_refill() might fail
to allocate a new Rx skb, thus leaving a hole on the Rx queue where no
valid Rx buffer exists.

To eliminate this situation:
1. Rewrite bcmgenet_rx_refill() to retain the current Rx skb on the Rx
   queue if a new replacement Rx skb can't be allocated and DMA-mapped.
   In this case, the data on the current Rx skb is effectively dropped.
2. Modify bcmgenet_desc_rx() to call bcmgenet_rx_refill() at the top of
   Rx packet processing loop, so that the new replacement Rx skb is
   already in place before the current Rx skb is processed.

Signed-off-by: Petri Gynther <pgynther@google.com>
Tested-by: Jaedon Shin <jaedon.shin@gmail.com>--
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Tested-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoBluetooth: Merge hdev->dbg_flags fields into hdev->dev_flags
Marcel Holtmann [Fri, 13 Mar 2015 17:20:35 +0000 (10:20 -0700)]
Bluetooth: Merge hdev->dbg_flags fields into hdev->dev_flags

With the extension of hdev->dev_flags utilizing a bitmap now, the space
is no longer restricted. Merge the hdev->dbg_flags into hdev->dev_flags
to save space on 64-bit architectures. On 32-bit architectures no size
reduction happens.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
9 years agoBluetooth: Use DECLARE_BITMAP for hdev->dev_flags field
Marcel Holtmann [Fri, 13 Mar 2015 16:04:17 +0000 (09:04 -0700)]
Bluetooth: Use DECLARE_BITMAP for hdev->dev_flags field

The hdev->dev_flags field has outgrown itself on 32-bit systems. So
instead of hacking around it, switch to using DECLARE_BITMAP.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
9 years agoBluetooth: btusb: Add helper for READ_LOCAL_VERSION command
Daniel Drake [Tue, 24 Feb 2015 00:16:47 +0000 (18:16 -0600)]
Bluetooth: btusb: Add helper for READ_LOCAL_VERSION command

Multiple codepaths duplicate some simple code to read and
sanity-check local version information. Before I add a couple more
such codepaths, add a helper to reduce duplication.

Signed-off-by: Daniel Drake <drake@endlessm.com>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
9 years agoBluetooth: Introduce hci_dev_test_and_set_flag helper macro
Marcel Holtmann [Fri, 13 Mar 2015 09:11:06 +0000 (02:11 -0700)]
Bluetooth: Introduce hci_dev_test_and_set_flag helper macro

Instead of manually coding test_and_set_bit on hdev->dev_flags all the
time, use hci_dev_test_and_set_flag helper macro.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
9 years agoBluetooth: Introduce hci_dev_test_and_clear_flag helper macro
Marcel Holtmann [Fri, 13 Mar 2015 09:11:05 +0000 (02:11 -0700)]
Bluetooth: Introduce hci_dev_test_and_clear_flag helper macro

Instead of manually coding test_and_clear_bit on hdev->dev_flags all the
time, use hci_dev_test_and_clear_flag helper macro.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
9 years agoBluetooth: Introduce hci_dev_test_and_change_flag helper macro
Marcel Holtmann [Fri, 13 Mar 2015 09:11:04 +0000 (02:11 -0700)]
Bluetooth: Introduce hci_dev_test_and_change_flag helper macro

Instead of manually coding test_and_change_bit on hdev->dev_flags all the
time, use hci_dev_test_and_change_flag helper macro.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
9 years agoBluetooth: Introduce hci_dev_change_flag helper macro
Marcel Holtmann [Fri, 13 Mar 2015 09:11:03 +0000 (02:11 -0700)]
Bluetooth: Introduce hci_dev_change_flag helper macro

Instead of manually coding change_bit on hdev->dev_flags all the time,
use hci_dev_change_flag helper macro.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
9 years agoBluetooth: Introduce hci_dev_clear_flag helper macro
Marcel Holtmann [Fri, 13 Mar 2015 09:11:02 +0000 (02:11 -0700)]
Bluetooth: Introduce hci_dev_clear_flag helper macro

Instead of manually coding clear_bit on hdev->dev_flags all the time,
use hci_dev_clear_flag helper macro.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
9 years agoBluetooth: Introduce hci_dev_set_flag helper macro
Marcel Holtmann [Fri, 13 Mar 2015 09:11:01 +0000 (02:11 -0700)]
Bluetooth: Introduce hci_dev_set_flag helper macro

Instead of manually coding set_bit on hdev->dev_flags all the time,
use hci_dev_set_flag helper macro.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
9 years agoBluetooth: Introduce hci_dev_test_flag helper macro
Marcel Holtmann [Fri, 13 Mar 2015 09:11:00 +0000 (02:11 -0700)]
Bluetooth: Introduce hci_dev_test_flag helper macro

Instead of manually coding test_bit on hdev->dev_flags all the time,
use hci_dev_test_flag helper macro.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
9 years agoBluetooth: Add support connectable advertising setting
Marcel Holtmann [Fri, 13 Mar 2015 05:30:58 +0000 (22:30 -0700)]
Bluetooth: Add support connectable advertising setting

The patch adds a second advertising setting that allows switching of the
controller into connectable mode independent of the global connectable
setting.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
9 years agoMerge branch 'tcp_metrics_netns_debloat'
David S. Miller [Fri, 13 Mar 2015 05:57:16 +0000 (01:57 -0400)]
Merge branch 'tcp_metrics_netns_debloat'

Eric W. Biederman says:

====================
tcp_metrics: Network namespace bloat reduction v3

This is a small pile of patches that convert tcp_metrics from using a
hash table per network namespace to using a single hash table for all
network namespaces.

This is broken up into several patches so that each small step along
the way could be carefully scrutinized as I wrote it, and equally so
that each small step can be reviewed.

There are several cleanups included in this series.  The addition of
panic calls during boot where we can not handle failure, and not trying
simplifies the code.  The removal of the return code from
tcp_metrics_flush_all.

The motivation for this change is that the tcp_metrics hash table at
128KiB is one of the largest components of a freshly allocated network
namespace.

I am resending the the previous version I sent has suffered bitrot, so I
have respun the patches so that they apply.  I believe I have addressed
all of the review concerns except optimal behavior on little machines
with 32-byte cache lines, which is beyond me as even the current code
has bad behavior in that case.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agotcp_metrics: Use a single hash table for all network namespaces.
Eric W. Biederman [Fri, 13 Mar 2015 05:07:44 +0000 (00:07 -0500)]
tcp_metrics: Use a single hash table for all network namespaces.

Now that all of the operations are safe on a single hash table
accross network namespaces, allocate a single global hash table
and update the code to use it.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agotcp_metrics: Rewrite tcp_metrics_flush_all
Eric W. Biederman [Fri, 13 Mar 2015 05:07:10 +0000 (00:07 -0500)]
tcp_metrics: Rewrite tcp_metrics_flush_all

Rewrite tcp_metrics_flush_all so that it can cope with entries from
different network namespaces on it's hash chain.

This is based on the logic in tcp_metrics_nl_cmd_del for deleting
a selection of entries from a tcp metrics hash chain.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agotcp_metrics: Remove the unused return code from tcp_metrics_flush_all
Eric W. Biederman [Fri, 13 Mar 2015 05:06:43 +0000 (00:06 -0500)]
tcp_metrics: Remove the unused return code from tcp_metrics_flush_all

tcp_metrics_flush_all always returns 0.  Remove the unnecessary return code.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agotcp_metrics: Add a field tcpm_net and verify it matches on lookup
Eric W. Biederman [Fri, 13 Mar 2015 05:05:52 +0000 (00:05 -0500)]
tcp_metrics: Add a field tcpm_net and verify it matches on lookup

In preparation for using one tcp metrics hash table for all network
namespaces add a field tcpm_net to struct tcp_metrics_block, and
verify that field on all hash table lookups.

Make the field tcpm_net of type possible_net_t so it takes no space
when network namespaces are disabled.

Further add a function tm_net to read that field so we can be
efficient when network namespaces are disabled and concise
the rest of the time.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agotcp_metrics: Mix the network namespace into the hash function.
Eric W. Biederman [Fri, 13 Mar 2015 05:05:24 +0000 (00:05 -0500)]
tcp_metrics: Mix the network namespace into the hash function.

In preparation for using one hash table for all network namespaces
mix the network namespace into the hash value.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agotcp_metrics: panic when tcp_metrics_init fails.
Eric W. Biederman [Fri, 13 Mar 2015 05:04:51 +0000 (00:04 -0500)]
tcp_metrics: panic when tcp_metrics_init fails.

There is not a practical way to cleanup during boot so
just panic if there is a problem initializing tcp_metrics.

That will at least give us a clear place to start debugging
if something does go wrong.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agovxlan: Don't set s_addr in vxlan_create_sock
Simon Horman [Fri, 13 Mar 2015 02:00:58 +0000 (11:00 +0900)]
vxlan: Don't set s_addr in vxlan_create_sock

In the case of AF_INET s_addr was set to INADDR_ANY (0) which which both
symmetric with the AF_INET6 case, where s_addr is not set, and unnecessary
as udp_conf is zeroed out earlier in the same function.

I suspect this change does not have any run-time effect due to compiler
optimisations. But it does make the code a little easier on the/my eyes.

Cc: Tom Herbert <therbert@google.com>
Signed-off-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agompls: In mpls_egress verify the packet length.
Eric W. Biederman [Thu, 12 Mar 2015 23:22:59 +0000 (18:22 -0500)]
mpls: In mpls_egress verify the packet length.

Reobert Shearman noticed that mpls_egress is failing to verify that
the bytes to be examined are in fact present in the packet before
mpls_egress reads those bytes.

As suggested by David Miller reduce this to a single pskb_may_pull
call so that we don't do unnecessary work in the fast path.

Reported-by: Robert Shearman <rshearma@brocade.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agonet/macb: Only adjust tx_clk on link change
Jaeden Amero [Thu, 12 Mar 2015 23:07:54 +0000 (18:07 -0500)]
net/macb: Only adjust tx_clk on link change

The PHY state machine (in drivers/net/phy/phy.c) will unconditionally
call phydev->adjust_link (macb_handle_link_change) when polling in the
PHY_CHANGELINK state. As currently written, macb always ends up
requesting a new tx_clk frequency in macb_handle_link_change. It is a
waste of time to request a new tx_clk frequency if the link state hasn't
changed, as the tx_clk will already be configured properly.

Let's only request a new tx_clk clock frequency when necessary.

Signed-off-by: Jaeden Amero <jaeden.amero@ni.com>
Cc: Josh Cartwright <joshc@ni.com>
Cc: Soren Brinkmann <soren.brinkmann@xilinx.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agorhashtable: Fix read-side crash during rehash
Herbert Xu [Fri, 13 Mar 2015 01:54:10 +0000 (12:54 +1100)]
rhashtable: Fix read-side crash during rehash

This patch fixes a typo rhashtable_lookup_compare where we fail
to recompute the hash when looking up the new table.  This causes
elements to be missed and potentially a crash during a resize.

Reported-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agorhashtable: kill ht->shift atomic operations
Daniel Borkmann [Thu, 12 Mar 2015 14:28:40 +0000 (15:28 +0100)]
rhashtable: kill ht->shift atomic operations

Commit c0c09bfdc415 ("rhashtable: avoid unnecessary wakeup for worker
queue") changed ht->shift to be atomic, which is actually unnecessary.

Instead of leaving the current shift in the core rhashtable structure,
it can be cached inside the individual bucket tables.

There, it will only be initialized once during a new table allocation
in the shrink/expansion slow path, and from then onward it stays immutable
for the rest of the bucket table liftime.

That allows shift to be non-atomic. The patch also moves hash_rnd
management into the table setup. The rhashtable structure now consumes
3 instead of 4 cachelines.

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Cc: Ying Xue <ying.xue@windriver.com>
Acked-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agorhashtable: Fix reader/rehash race
Herbert Xu [Thu, 12 Mar 2015 11:07:49 +0000 (22:07 +1100)]
rhashtable: Fix reader/rehash race

There is a potential race condition between readers and the rehasher.
In particular, the rehasher could have started a rehash while the
reader finishes a scan of the old table but fails to see the new
table pointer.

This patch closes this window by adding smp_wmb/smp_rmb.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoMerge branch 'listener_refactor'
David S. Miller [Fri, 13 Mar 2015 02:58:27 +0000 (22:58 -0400)]
Merge branch 'listener_refactor'

Eric Dumazet says:

====================
inet: tcp listener refactoring, part 8

These patches prepare request socks being hashed into general ehash
table : We declare 3 aliases (ireq_state, ireq_refcnt, ireq_family)

Note that refcnt is not yet handled, this will be done later.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoinet: introduce ireq_family
Eric Dumazet [Thu, 12 Mar 2015 23:44:10 +0000 (16:44 -0700)]
inet: introduce ireq_family

Before inserting request socks into general hash table,
fill their socket family.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoinet: get_openreq4() & get_openreq6() do not need listener
Eric Dumazet [Thu, 12 Mar 2015 23:44:09 +0000 (16:44 -0700)]
inet: get_openreq4() & get_openreq6() do not need listener

ireq->ir_num contains local port, use it.

Also, get_openreq4() dumping listen_sk->refcnt makes litle sense.

inet_diag_fill_req() can also use ireq->ir_num

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoinet: prepare sock_edemux() & sock_gen_put() for new SYN_RECV state
Eric Dumazet [Thu, 12 Mar 2015 23:44:08 +0000 (16:44 -0700)]
inet: prepare sock_edemux() & sock_gen_put() for new SYN_RECV state

sock_edemux() & sock_gen_put() should be ready to cope with request socks.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agonet: add req_prot_cleanup() & req_prot_init() helpers
Eric Dumazet [Thu, 12 Mar 2015 23:44:07 +0000 (16:44 -0700)]
net: add req_prot_cleanup() & req_prot_init() helpers

Make proto_register() & proto_unregister() a bit nicer.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoinet: add rsk_refcnt/ireq_refcnt to request socks
Eric Dumazet [Thu, 12 Mar 2015 23:44:06 +0000 (16:44 -0700)]
inet: add rsk_refcnt/ireq_refcnt to request socks

When request socks will be in ehash, they'll need to be refcounted.

This patch adds rsk_refcnt/ireq_refcnt macros, and adds
reqsk_put() function, but nothing yet use them.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoinet: add ireq_state field to inet_request_sock
Eric Dumazet [Thu, 12 Mar 2015 23:44:05 +0000 (16:44 -0700)]
inet: add ireq_state field to inet_request_sock

We need to identify request sock when they'll be visible in
global ehash table.

ireq_state is an alias to req.__req_common.skc_state.

Its value is set to TCP_NEW_SYN_RECV

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoinet: add TCP_NEW_SYN_RECV state
Eric Dumazet [Thu, 12 Mar 2015 23:44:04 +0000 (16:44 -0700)]
inet: add TCP_NEW_SYN_RECV state

TCP_SYN_RECV state is currently used by fast open sockets.

Initial TCP requests (the pseudo sockets created when a SYN is received)
are not yet associated to a state. They are attached to their parent,
and the parent is in TCP_LISTEN state.

This commit adds TCP_NEW_SYN_RECV state, so that we can convert
TCP stack to a different schem gradually.

This state is not exported to user space.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoipv6: add missing ireq_net & ir_cookie initializations
Eric Dumazet [Thu, 12 Mar 2015 23:44:03 +0000 (16:44 -0700)]
ipv6: add missing ireq_net & ir_cookie initializations

I forgot to update dccp_v6_conn_request() & cookie_v6_check().
They both need to set ireq->ireq_net and ireq->ir_cookie

Lets clear ireq->ir_cookie in inet_reqsk_alloc()

Signed-off-by: Eric Dumazet <edumazet@google.com>
Fixes: 33cf7c90fe2f ("net: add real socket cookies")
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agocls_bpf: do eBPF invocation under non-bh RCU lock variant for maps
Daniel Borkmann [Thu, 12 Mar 2015 19:03:12 +0000 (20:03 +0100)]
cls_bpf: do eBPF invocation under non-bh RCU lock variant for maps

Currently, it is possible in cls_bpf to access eBPF maps only under
rcu_read_lock_bh() variants: while on ingress side, that is, handle_ing(),
the classifier would be called from __netif_receive_skb_core() under
rcu_read_lock(); on egress side, however, it's rcu_read_lock_bh() via
__dev_queue_xmit().

This rcu/rcu_bh mix doesn't work together with eBPF maps as they require
soley to be called under rcu_read_lock(). eBPF maps could also be shared
among various other eBPF programs (possibly even with other eBPF program
types, f.e. tracing) and user space processes, so any context is assumed.

Therefore, a possible fix for cls_bpf is to wrap/nest eBPF program
invocation under non-bh RCU lock variant.

Fixes: e2e9b6541dd4 ("cls_bpf: add initial eBPF support for programmable classifiers")
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoMerge branch 'fib_trie_table_merge_fixes'
David S. Miller [Thu, 12 Mar 2015 22:26:58 +0000 (18:26 -0400)]
Merge branch 'fib_trie_table_merge_fixes'

Alexander Duyck says:

====================
fib_trie: Minor fixes for table merge

This patch set addresses two issues reported with the tables merged, the
first is a NULL pointer dereference, and the other is to remove a WARN_ON
and set the ordering for aliases from different tables with the same slen
values.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agofib_trie: Provide a deterministic order for fib_alias w/ tables merged
Alexander Duyck [Thu, 12 Mar 2015 21:46:29 +0000 (14:46 -0700)]
fib_trie: Provide a deterministic order for fib_alias w/ tables merged

This change makes it so that we should always have a deterministic ordering
for the main and local aliases within the merged table when two leaves
overlap.

So for example if we have a leaf with a key of 192.168.254.0.  If we
previously added two aliases with a prefix length of 24 from both local and
main the first entry would be first and the second would be second.  When I
was coding this I had added a WARN_ON should such a situation occur as I
wasn't sure how likely it would be.  However this WARN_ON has been
triggered so this is something that should be addressed.

With this patch the ordering of the aliases is as follows.  First they are
sorted on prefix length, then on their table ID, then tos, and finally
priority.  This way what we end up doing is essentially interleaving the
two tables on what used to be leaf_info structure boundaries.

Fixes: 0ddcf43d5 ("ipv4: FIB Local/MAIN table collapse")
Reported-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Alexander Duyck <alexander.h.duyck@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agofib_trie: Avoid NULL pointer if local table is not allocated
Alexander Duyck [Thu, 12 Mar 2015 21:46:23 +0000 (14:46 -0700)]
fib_trie: Avoid NULL pointer if local table is not allocated

The function fib_unmerge assumed the local table had already been
allocated.  If that is not the case however when custom rules are applied
then this can result in a NULL pointer dereference.

In order to prevent this we must check the value of the local table pointer
and if it is NULL simply return 0 as there is no local table to separate
from the main.

Fixes: 0ddcf43d5 ("ipv4: FIB Local/MAIN table collapse")
Reported-by: Madhu Challa <challa@noironetworks.com>
Signed-off-by: Alexander Duyck <alexander.h.duyck@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoebpf: verifier: check that call reg with ARG_ANYTHING is initialized
Daniel Borkmann [Thu, 12 Mar 2015 16:21:42 +0000 (17:21 +0100)]
ebpf: verifier: check that call reg with ARG_ANYTHING is initialized

I noticed that a helper function with argument type ARG_ANYTHING does
not need to have an initialized value (register).

This can worst case lead to unintented stack memory leakage in future
helper functions if they are not carefully designed, or unintended
application behaviour in case the application developer was not careful
enough to match a correct helper function signature in the API.

The underlying issue is that ARG_ANYTHING should actually be split
into two different semantics:

  1) ARG_DONTCARE for function arguments that the helper function
     does not care about (in other words: the default for unused
     function arguments), and

  2) ARG_ANYTHING that is an argument actually being used by a
     helper function and *guaranteed* to be an initialized register.

The current risk is low: ARG_ANYTHING is only used for the 'flags'
argument (r4) in bpf_map_update_elem() that internally does strict
checking.

Fixes: 17a5267067f3 ("bpf: verifier (add verifier core)")
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoMerge branch 'possible_net_t'
David S. Miller [Thu, 12 Mar 2015 18:39:44 +0000 (14:39 -0400)]
Merge branch 'possible_net_t'

Eric W. Biederman says:

====================
Introduce possible_net_t

The current usage of write_pnet and read_pnet is a little laborious and
error prone as you only notice if you failed to include them if are
compiling with network namespaces enabled.

possible_net_t remedies that by using a type that is 0 bytes when
network namespaces are disabled and can only be read and written to with
read_pnet and write_pnet.

Aka less work and safer for the same effect.

I kill hold_net and release_net first as are they are haven't been used
since 2008 and are noise at the points where write_pnet and read_pnet
are used.

I have folded in Eric Dumazets suggestions to improve the killing of
hold_net and release net.  And respon.  I had to respin anyway as
there was enough changes elsewhere in the tree the previous version
of these patches did not quite apply cleanly.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agonet: Introduce possible_net_t
Eric W. Biederman [Thu, 12 Mar 2015 04:06:44 +0000 (23:06 -0500)]
net: Introduce possible_net_t

Having to say
> #ifdef CONFIG_NET_NS
>  struct net *net;
> #endif

in structures is a little bit wordy and a little bit error prone.

Instead it is possible to say:
> typedef struct {
> #ifdef CONFIG_NET_NS
>       struct net *net;
> #endif
> } possible_net_t;

And then in a header say:

>  possible_net_t net;

Which is cleaner and easier to use and easier to test, as the
possible_net_t is always there no matter what the compile options.

Further this allows read_pnet and write_pnet to be functions in all
cases which is better at catching typos.

This change adds possible_net_t, updates the definitions of read_pnet
and write_pnet, updates optional struct net * variables that
write_pnet uses on to have the type possible_net_t, and finally fixes
up the b0rked users of read_pnet and write_pnet.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agonet: Kill hold_net release_net
Eric W. Biederman [Thu, 12 Mar 2015 04:04:08 +0000 (23:04 -0500)]
net: Kill hold_net release_net

hold_net and release_net were an idea that turned out to be useless.
The code has been disabled since 2008.  Kill the code it is long past due.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoMerge branch 'rhashtable-cleanups'
David S. Miller [Thu, 12 Mar 2015 18:35:35 +0000 (14:35 -0400)]
Merge branch 'rhashtable-cleanups'

Herbert Xu says:

====================
rhashtable hash cleanups

This is a rebase on top of the nested lock annotation fix.

Nothing to see here, just a bunch of simple clean-ups before
I move onto something more substantial (hopefully).
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agorhashtable: Remove obj_raw_hashfn
Herbert Xu [Thu, 12 Mar 2015 03:49:41 +0000 (14:49 +1100)]
rhashtable: Remove obj_raw_hashfn

Now that the only caller of obj_raw_hashfn is head_hashfn, we can
simply kill it and fold it into the latter.

This patch also moves the common shift from head_hashfn/key_hashfn
into rht_bucket_index.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Acked-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agorhashtable: Remove key length argument to key_hashfn
Herbert Xu [Thu, 12 Mar 2015 03:49:40 +0000 (14:49 +1100)]
rhashtable: Remove key length argument to key_hashfn

key_hashfn has only one caller and it doesn't really need to supply
the key length as an extra parameter.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Acked-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agorhashtable: Use head_hashfn instead of obj_raw_hashfn
Herbert Xu [Thu, 12 Mar 2015 03:49:39 +0000 (14:49 +1100)]
rhashtable: Use head_hashfn instead of obj_raw_hashfn

Now that we don't have cross-table hashes, we no longer need to
keep the entire hash value so all users of obj_raw_hashfn can
use head_hashfn instead.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Acked-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agorhashtable: Move masking back into key_hashfn
Herbert Xu [Thu, 12 Mar 2015 03:49:38 +0000 (14:49 +1100)]
rhashtable: Move masking back into key_hashfn

This patch reverts commit c88455ce50ae4224d84960ce2baa53e61580df27
("rhashtable: key_hashfn() must return full hash value") because
the only user of it always masks the hash value.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Acked-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoBluetooth: Remove two else branches that are not needed
Marcel Holtmann [Thu, 12 Mar 2015 00:47:40 +0000 (17:47 -0700)]
Bluetooth: Remove two else branches that are not needed

The SMP code contains two else branches that are not needed since the
successful test will actually leave the function.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
9 years agonet/mlx5_core: don't export static symbol
Julia Lawall [Wed, 11 Mar 2015 16:56:25 +0000 (17:56 +0100)]
net/mlx5_core: don't export static symbol

The semantic patch that fixes this problem is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@r@
type T;
identifier f;
@@

static T f (...) { ... }

@@
identifier r.f;
declarer name EXPORT_SYMBOL;
@@

-EXPORT_SYMBOL(f);
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agorhashtable: Add annotation to nested lock
Herbert Xu [Thu, 12 Mar 2015 03:47:13 +0000 (14:47 +1100)]
rhashtable: Add annotation to nested lock

Commit aa34a6cb0478842452bac58edb50d3ef9e178c92 ("rhashtable:
Add arbitrary rehash function") killed the annotation on the
nested lock which leads to bitching from lockdep.

Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>