Commit Graph

562916 Commits

Author SHA1 Message Date
David S. Miller 08f411d6a4 Merge branch 'cxgb4-l2-table-enhancements'
Hariprasad Shenai says:

====================
Few l2 table related enhancements for cxgb4

This series adds a new API to allocate and update l2t entry, replaces
arpq_head/arpq_tail with double skb double linked list. Use t4_mgmt_tx()
to send control packets of l2t write request. Use symbolic constants
while calculating vlan priority.

This patch series has been created against net-next tree and includes
patches on cxgb4 driver.

We have included all the maintainers of respective drivers. Kindly review
the change and let us know in case of any review comments.

Thanks

V2: Remove unnecessary MAS operation while calculating vlan prio in
    PATCH 1/4 ("cxgb4: Use symbolic constant for VLAN priority calculation")
    based on review comment by David Miller
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-17 15:51:05 -05:00
Hariprasad Shenai 749cb5fe48 cxgb4: Replace arpq_head/arpq_tail with SKB double link-list code
Based on original work by Michael Werner <werner@chelsio.com>

Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-17 15:51:05 -05:00
Hariprasad Shenai 9baeb9d7d8 cxgb4: Use t4_mgmt_tx() API for sending write l2t request ctrl packets.
Based on original work by Michael Werner <werner@chelsio.com>

Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-17 15:51:04 -05:00
Hariprasad Shenai f7502659ce cxgb4: Add API to alloc l2t entry; also update existing ones
Based on original work by Kumar Sanghvi <kumaras@chelsio.com>

Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-17 15:51:04 -05:00
Hariprasad Shenai e41e282428 cxgb4: Use symbolic constant for VLAN priority calculation
Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-17 15:51:04 -05:00
WANG Cong ac5cc97799 net: check both type and procotol for tcp sockets
Dmitry reported the following out-of-bound access:

Call Trace:
 [<ffffffff816cec2e>] __asan_report_load4_noabort+0x3e/0x40
mm/kasan/report.c:294
 [<ffffffff84affb14>] sock_setsockopt+0x1284/0x13d0 net/core/sock.c:880
 [<     inline     >] SYSC_setsockopt net/socket.c:1746
 [<ffffffff84aed7ee>] SyS_setsockopt+0x1fe/0x240 net/socket.c:1729
 [<ffffffff85c18c76>] entry_SYSCALL_64_fastpath+0x16/0x7a
arch/x86/entry/entry_64.S:185

This is because we mistake a raw socket as a tcp socket.
We should check both sk->sk_type and sk->sk_protocol to ensure
it is a tcp socket.

Willem points out __skb_complete_tx_timestamp() needs to fix as well.

Reported-by: Dmitry Vyukov <dvyukov@google.com>
Cc: Willem de Bruijn <willemdebruijn.kernel@gmail.com>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Acked-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-17 15:46:32 -05:00
Iyappan Subramanian 67894eec3e drivers: net: xgene: fix Tx flow control
Currently the Tx flow control is based on reading the hardware state,
which is not accurate since it may not reflect the descriptors that
are not yet reached the memory.

To accurately control the Tx flow, changing it to be software based.

Signed-off-by: Iyappan Subramanian <isubramanian@apm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-17 15:45:53 -05:00
Eric Dumazet 07e100f984 tcp: restore fastopen with no data in SYN packet
Yuchung tracked a regression caused by commit 57be5bdad7 ("ip: convert
tcp_sendmsg() to iov_iter primitives") for TCP Fast Open.

Some Fast Open users do not actually add any data in the SYN packet.

Fixes: 57be5bdad7 ("ip: convert tcp_sendmsg() to iov_iter primitives")
Reported-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Acked-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-17 15:37:39 -05:00
Rainer Weikusat 3822b5c2fc af_unix: Revert 'lock_interruptible' in stream receive code
With b3ca9b02b0, the AF_UNIX SOCK_STREAM
receive code was changed from using mutex_lock(&u->readlock) to
mutex_lock_interruptible(&u->readlock) to prevent signals from being
delayed for an indefinite time if a thread sleeping on the mutex
happened to be selected for handling the signal. But this was never a
problem with the stream receive code (as opposed to its datagram
counterpart) as that never went to sleep waiting for new messages with the
mutex held and thus, wouldn't cause secondary readers to block on the
mutex waiting for the sleeping primary reader. As the interruptible
locking makes the code more complicated in exchange for no benefit,
change it back to using mutex_lock.

Signed-off-by: Rainer Weikusat <rweikusat@mobileactivedefense.com>
Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-17 15:33:47 -05:00
Jakub Kicinski 301c141d6a nfp: clear ring delayed kick counters
We need to clear delayed kick counters when we free rings otherwise
after ndo_close()/ndo_open() we could kick HW by more entries than
actually written to rings.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Rolf Neugebauer <rolf.neugebauer@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-17 15:27:38 -05:00
Eric Dumazet 1bd4978a88 tun: honor IFF_UP in tun_get_user()
If a tun interface is turned down, we should not allow packet injection
into the kernel.

Kernel does not send packets to the tun already.

TUNATTACHFILTER can not be used as only tun_net_xmit() is taking care
of it.

Reported-by: Curt Wohlgemuth <curtw@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-17 15:25:57 -05:00
Hannes Frederic Sowa 715f504b11 ipv6: add IPV6_HDRINCL option for raw sockets
Same as in Windows, we miss IPV6_HDRINCL for SOL_IPV6 and SOL_RAW.
The SOL_IP/IP_HDRINCL is not available for IPv6 sockets.

Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-17 15:12:28 -05:00
Xin Long 32bc201e19 ipv6: allow routes to be configured with expire values
Add the support for adding expire value to routes,  requested by
Tom Gundersen <teg@jklm.no> for systemd-networkd, and NetworkManager
wants it too.

implement it by adding the new RTNETLINK attribute RTA_EXPIRES.

Signed-off-by: Xin Long <lucien.xin@gmail.com>
Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-17 15:08:51 -05:00
Linus Torvalds ce42af94aa Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux
Pull drm fixes from Dave Airlie:
 "Some i915 fixes, one omap fix, one core regression fix.

  Not even enough fixes for a twelve days of xmas song, which seemms
  good"

* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
  drm: Don't overwrite UNVERFIED mode status to OK
  drm/omap: fix fbdev pix format to support all platforms
  drm/i915: Do a better job at disabling primary plane in the noatomic case.
  drm/i915/skl: Double RC6 WRL always on
  drm/i915/skl: Disable coarse power gating up until F0
  drm/i915: Remove incorrect warning in context cleanup
2015-12-17 11:55:29 -08:00
Will Deacon b4b29f9485 locking/osq: Fix ordering of node initialisation in osq_lock
The Cavium guys reported a soft lockup on their arm64 machine, caused by
commit c55a6ffa62 ("locking/osq: Relax atomic semantics"):

    mutex_optimistic_spin+0x9c/0x1d0
    __mutex_lock_slowpath+0x44/0x158
    mutex_lock+0x54/0x58
    kernfs_iop_permission+0x38/0x70
    __inode_permission+0x88/0xd8
    inode_permission+0x30/0x6c
    link_path_walk+0x68/0x4d4
    path_openat+0xb4/0x2bc
    do_filp_open+0x74/0xd0
    do_sys_open+0x14c/0x228
    SyS_openat+0x3c/0x48
    el0_svc_naked+0x24/0x28

This is because in osq_lock we initialise the node for the current CPU:

    node->locked = 0;
    node->next = NULL;
    node->cpu = curr;

and then publish the current CPU in the lock tail:

    old = atomic_xchg_acquire(&lock->tail, curr);

Once the update to lock->tail is visible to another CPU, the node is
then live and can be both read and updated by concurrent lockers.

Unfortunately, the ACQUIRE semantics of the xchg operation mean that
there is no guarantee the contents of the node will be visible before
lock tail is updated.  This can lead to lock corruption when, for
example, a concurrent locker races to set the next field.

Fixes: c55a6ffa62 ("locking/osq: Relax atomic semantics"):
Reported-by: David Daney <ddaney@caviumnetworks.com>
Reported-by: Andrew Pinski <andrew.pinski@caviumnetworks.com>
Tested-by: Andrew Pinski <andrew.pinski@caviumnetworks.com>
Acked-by: Davidlohr Bueso <dave@stgolabs.net>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1449856001-21177-1-git-send-email-will.deacon@arm.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-12-17 11:40:29 -08:00
Linus Torvalds d7637d01be Merge branch 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm
Pull libnvdimm fixes from Dan Williams:

 - Two bug fixes for misuse of PAGE_MASK in scatterlist and dma-debug.
   These are tagged for -stable.  The scatterlist impact is potentially
  corrupted dma addresses on HIGHMEM enabled platforms.

 - A minor locking fix for the NFIT hot-add implementation that is new
   in 4.4-rc.  This would only trigger in the case a hot-add raced
   driver removal.

* 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
  dma-debug: Fix dma_debug_entry offset calculation
  Revert "scatterlist: use sg_phys()"
  nfit: acpi_nfit_notify(): Do not leave device locked
2015-12-17 11:20:13 -08:00
Hannes Frederic Sowa 3036facbb7 fou: clean up socket with kfree_rcu
fou->udp_offloads is managed by RCU. As it is actually included inside
the fou sockets, we cannot let the memory go out of scope before a grace
period. We either can synchronize_rcu or switch over to kfree_rcu to
manage the sockets. kfree_rcu seems appropriate as it is used by vxlan
and geneve.

Fixes: 23461551c0 ("fou: Support for foo-over-udp RX path")
Cc: Tom Herbert <tom@herbertland.com>
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-16 19:03:02 -05:00
Hubert Sokolowski b3379041dd net: Pass ndm_state to route netlink FDB notifications.
Before this change applications monitoring FDB notifications
were not able to determine whether a new FDB entry is permament
or not:
bridge fdb add f1:f2:f3:f4:f5:f8 dev sw0p1 temp self
bridge fdb add f1:f2:f3:f4:f5:f9 dev sw0p1 self

bridge monitor fdb

f1:f2:f3:f4:f5:f8 dev sw0p1 self permanent
f1:f2:f3:f4:f5:f9 dev sw0p1 self permanent

With this change ndm_state from the original netlink message
is passed to the new netlink message sent as notification.

bridge fdb add f1:f2:f3:f4:f5:f6 dev sw0p1 self
bridge fdb add f1:f2:f3:f4:f5:f7 dev sw0p1 temp self

bridge monitor fdb
f1:f2:f3:f4:f5:f6 dev sw0p1 self permanent
f1:f2:f3:f4:f5:f7 dev sw0p1 self static

Signed-off-by: Hubert Sokolowski <hubert.sokolowski@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-16 18:36:46 -05:00
David S. Miller 4d4f37910b Another set of fixes:
* memory leak fixes (from Ola)
  * operating mode notification spec compliance fix (from Eyal)
  * copy rfkill names in case pointer becomes invalid (myself)
  * two hardware restart fixes (myself)
  * get rid of "limiting TX power" log spam (myself)
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Merge tag 'mac80211-for-davem-2015-12-15' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211

Johannes Berg says:

====================
Another set of fixes:
 * memory leak fixes (from Ola)
 * operating mode notification spec compliance fix (from Eyal)
 * copy rfkill names in case pointer becomes invalid (myself)
 * two hardware restart fixes (myself)
 * get rid of "limiting TX power" log spam (myself)
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-16 18:33:38 -05:00
Martin Roth 79aa05a24f 82xx: FCC: Fixing a bug causing to FCC port lock-up
The patch fixes FCC port lock-up, which occurs as a result of a bug
during underrun/collision handling. Within the tx_startup() function
in mac-fcc.c, the address of last BD is not calculated correctly.
As a result of wrong calculation of the last BD address, the next
transmitted BD may be set to an area out of the transmit BD ring.
This actually causes to port lock-up and it is not recoverable.

Signed-off-by: Martin Roth <martin.roth@motorolasolutions.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-16 18:32:35 -05:00
Hamish Martin 7bff47da1e gianfar: Don't enable RX Filer if not supported
After commit 15bf176db1 ("gianfar: Don't enable the Filer w/o the
Parser"), 'TSEC' model controllers (for example as seen on MPC8541E)
always have 8 bytes stripped from the front of received frames.
Only 'eTSEC' gianfar controllers have the RX Filer capability (amongst
other enhancements). Previously this was treated as always enabled
for both 'TSEC' and 'eTSEC' controllers.
In commit 15bf176db1 ("gianfar: Don't enable the Filer w/o the Parser")
a subtle change was made to the setting of 'uses_rxfcb' to effectively
always set it (since 'rx_filer_enable' was always true). This had the
side-effect of always stripping 8 bytes from the front of received frames
on 'TSEC' type controllers.

We now only enable the RX Filer capability on controller types that
support it, thereby avoiding the issue for 'TSEC' type controllers.

Reviewed-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
Reviewed-by: Mark Tomlinson <mark.tomlinson@alliedtelesis.co.nz>
Signed-off-by: Hamish Martin <hamish.martin@alliedtelesis.co.nz>
Reviewed-by: Claudiu Manoil <claudiu.manoil@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-16 18:31:00 -05:00
Daniel Mentz 0354aec19c dma-debug: Fix dma_debug_entry offset calculation
dma-debug uses struct dma_debug_entry to keep track of dma coherent
memory allocation requests. The virtual address is converted into a pfn
and an offset. Previously, the offset was calculated using an incorrect
bit mask.  As a result, we saw incorrect error messages from dma-debug
like the following:

"DMA-API: exceeded 7 overlapping mappings of cacheline 0x03e00000"

Cacheline 0x03e00000 does not exist on our platform.

Cc: <stable@vger.kernel.org>
Fixes: 0abdd7a81b ("dma-debug: introduce debug_dma_assert_idle()")
Signed-off-by: Daniel Mentz <danielmentz@google.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2015-12-16 11:24:26 -08:00
Linus Torvalds a5e90b1b07 Merge branch 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm
Pull ARM fixes from Russell King:
 "Further ARM fixes:
   - Anson Huang noticed that we were corrupting a register we shouldn't
     be during suspend on some CPUs.
   - Shengjiu Wang spotted a bug in the 'swp' instruction emulation.
   - Will Deacon fixed a bug in the ASID allocator.
   - Laura Abbott fixed the kernel permission protection to apply to all
     threads running in the system.
   - I've fixed two bugs with the domain access control register
     handling, one to do with printing an appropriate value at oops
     time, and the other to further fix the uaccess_with_memcpy code"

* 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm:
  ARM: 8475/1: SWP emulation: Restore original *data when failed
  ARM: 8471/1: need to save/restore arm register(r11) when it is corrupted
  ARM: fix uaccess_with_memcpy() with SW_DOMAIN_PAN
  ARM: report proper DACR value in oops dumps
  ARM: 8464/1: Update all mm structures with section adjustments
  ARM: 8465/1: mm: keep reserved ASIDs in sync with mm after multiple rollovers
2015-12-16 10:57:24 -08:00
Hannes Frederic Sowa 7bbadd2d10 net: fix warnings in 'make htmldocs' by moving macro definition out of field declaration
Docbook does not like the definition of macros inside a field declaration
and adds a warning. Move the definition out.

Fixes: 79462ad02e ("net: add validation for the socket syscall protocol argument")
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-16 11:44:17 -05:00
Herbert Xu c6ff526829 rhashtable: Fix walker list corruption
The commit ba7c95ea38 ("rhashtable:
Fix sleeping inside RCU critical section in walk_stop") introduced
a new spinlock for the walker list.  However, it did not convert
all existing users of the list over to the new spin lock.  Some
continued to use the old mutext for this purpose.  This obviously
led to corruption of the list.

The fix is to use the spin lock everywhere where we touch the list.

This also allows us to do rcu_rad_lock before we take the lock in
rhashtable_walk_start.  With the old mutex this would've deadlocked
but it's safe with the new spin lock.

Fixes: ba7c95ea38 ("rhashtable: Fix sleeping inside RCU...")
Reported-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-16 11:13:14 -05:00
David S. Miller 04ad37836c Included changes:
- change my email in MAINTAINERS and Doc files
 - create and export list of single hop neighs per interface
 - protect CRC in the BLA code by means of its own lock
 - minor fixes and code cleanups
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Merge tag 'batman-adv-for-davem' of git://git.open-mesh.org/linux-merge

Antonio Quartulli says:

====================
Included changes:
- change my email in MAINTAINERS and Doc files
- create and export list of single hop neighs per interface
- protect CRC in the BLA code by means of its own lock
- minor fixes and code cleanups
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-16 11:09:40 -05:00
David S. Miller 897ca373be Merge branch 'geneve-udp-port-offload'
Anjali Singhai Jain says:

====================
Add support for Geneve udp port offload

This patch series adds new ndo ops for Geneve add/del port, so as
to help offload Geneve tunnel functionalities such as RX checksum,
RSS, filters etc.

i40e driver has been tested with the changes to make sure the offloads
happen.

We do understand that this is not the ideal solution and most likely
will be redone with a more generic offload framework.
But this certainly will enable us to start seeing benefits of the
accelerations for Geneve tunnels.

As a side note, we did find an existing issue in i40e driver where a
service task can modify tunnel data structures with no locks held to
help linearize access. A separate patch will be taking care of that issue.

A question out to the community is regarding the driver Kconfig parameters
for VxLAN and Geneve, it would be ideal to drop those if there is a way
to help resolve vxlan/geneve_get_rx_port symbols while the tunnel modules
are not loaded.

Performance numbers:
With the offloads enable on X722 devices with remote checksum enabled
and no other tuning in terms of cpu governer etc on my test machine:

With offload
Throughput: 5527Mbits/sec with a single thread
%cpu: ~43% per core with 4 threads

Without offload
Throughput: 2364Mbits/sec with a single thread
%cpu: ~99% per core with 4 threads

These numbers will get better for X722 as it is being worked. But
this does bring out the delta in terms of when the stack is notified
with csum_level 1 and CHECKSUM_UNNECESSARY vs not without the RX offload.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-16 10:59:05 -05:00
Singhai, Anjali cd866606c9 i40e: Call geneve_get_rx_port to get the existing Geneve ports
This patch adds a call to geneve_get_rx_port in i40e so that when it
comes up it can learn about the existing geneve tunnels.

Signed-off-by: Anjali Singhai Jain <anjali.singhai@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-16 10:58:56 -05:00
Singhai, Anjali 05ca4029b2 geneve: Add geneve_get_rx_port support
This patch adds an op that the drivers can call into to get existing
geneve ports.

Signed-off-by: Anjali Singhai Jain <anjali.singhai@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-16 10:58:56 -05:00
Singhai, Anjali c110c311b1 i40e: Kernel dependency update for i40e to support geneve offload
Update the Kconfig file with dependency for supporting GENEVE tunnel
offloads.

Signed-off-by: Anjali Singhai Jain <anjali.singhai@intel.com>
Signed-off-by: Kiran Patil <kiran.patil@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-16 10:58:56 -05:00
Singhai, Anjali 6a89902405 i40e: geneve tunnel offload support
This patch adds driver hooks to implement ndo_ops to add/del
udp port in the HW to identify GENEVE tunnels.

Signed-off-by: Anjali Singhai Jain <anjali.singhai@intel.com>
Signed-off-by: Kiran Patil <kiran.patil@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-16 10:58:56 -05:00
Singhai, Anjali a8170d2b9e geneve: Add geneve udp port offload for ethernet devices
Add ndo_ops to add/del UDP ports to a device that supports geneve
offload.

v2: Comment fix.

Signed-off-by: Anjali Singhai Jain <anjali.singhai@intel.com>
Signed-off-by: Kiran Patil <kiran.patil@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-16 10:58:46 -05:00
Zhu Yanjun 566178f853 net: sctp: dynamically enable or disable pf state
As we all know, the value of pf_retrans >= max_retrans_path can
disable pf state. The variables of pf_retrans and max_retrans_path
can be changed by the userspace application.

Sometimes the user expects to disable pf state while the 2
variables are changed to enable pf state. So it is necessary to
introduce a new variable to disable pf state.

According to the suggestions from Vlad Yasevich, extra1 and extra2
are removed. The initialization of pf_enable is added.

Acked-by: Vlad Yasevich <vyasevich@gmail.com>
Signed-off-by: Zhu Yanjun <zyjzyj2000@gmail.com>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-16 10:56:50 -05:00
Herbert Xu 3a324606bb rhashtable: Enforce minimum size on initial hash table
William Hua <william.hua@canonical.com> wrote:
>
> I wasn't aware there was an enforced minimum size. I simply set the
> nelem_hint in the rhastable_params struct to 1, expecting it to grow as
> needed. This caused a segfault afterwards when trying to insert an
> element.

OK we're doing the size computation before we enforce the limit
on min_size.

---8<---
We need to do the initial hash table size computation after we
have obtained the correct min_size/max_size parameters.  Otherwise
we may end up with a hash table whose size is outside the allowed
envelope.

Fixes: a998f712f7 ("rhashtable: Round up/down min/max_size to...")
Reported-by: William Hua <william.hua@canonical.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-16 10:44:08 -05:00
Simon Wunderlich 5a1dd8a477 batman-adv: lock crc access in bridge loop avoidance
We have found some networks in which nodes were constantly requesting
other nodes BLA claim tables to synchronize, just to ask for that again
once completed. The reason was that the crc checksum of the asked nodes
were out of sync due to missing locking and multiple writes to the same
crc checksum when adding/removing entries. Therefore the asked nodes
constantly reported the wrong crc, which caused repeating requests.

To avoid multiple functions changing a backbone gateways crc entry at
the same time, lock it using a spinlock.

Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Tested-by: Alfons Name <AlfonsName@web.de>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
2015-12-16 15:17:09 +08:00
Sven Eckelmann c05a57f6fb batman-adv: Fix typo 'wether' -> 'whether'
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
2015-12-16 15:17:09 +08:00
Sven Eckelmann 01f6b5c76a batman-adv: Use chain pointer when purging fragments
The chain pointer was already created in batadv_frag_purge_orig to make the
checks more readable. Just use the chain pointer everywhere instead of
having the same dereference + array access in the most lines of this
function.

Signed-off-by: Sven Eckelmann <sven@narfation.org>
Acked-by: Martin Hundebøll <martin@hundeboll.net>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
2015-12-16 15:17:09 +08:00
Simon Wunderlich ad7e2c466d batman-adv: unify flags access style in tt global add
This should slightly improve readability

Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
2015-12-16 15:17:08 +08:00
Simon Wunderlich c169c59dd5 batman-adv: detect local excess vlans in TT request
If the local representation of the global TT table of one originator has
more VLAN entries than the respective TT update, there is some
inconsistency present. By detecting and reporting this inconsistency,
the global table gets updated and the excess VLAN will get removed in
the process.

Reported-by: Alessandro Bolletta <alessandro@mediaspot.net>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Acked-by: Antonio Quartulli <antonio@meshcoding.com>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
2015-12-16 15:17:08 +08:00
Eric Dumazet 887dc9f2ce inet: tcp: fix inetpeer_set_addr_v4()
David Ahern added a vif field in the a4 part of inetpeer_addr struct.

This broke IPv4 TCP fast open client side and more generally tcp metrics
cache, because inetpeer_addr_cmp() is now comparing two u32 instead of
one.

inetpeer_set_addr_v4() needs to properly init vif field, otherwise
the comparison result depends on uninitialized data.

Fixes: 192132b9a0 ("net: Add support for VRFs to inetpeer cache")
Reported-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-16 00:14:12 -05:00
Hannes Frederic Sowa 9b29c6962b ipv6: automatically enable stable privacy mode if stable_secret set
Bjørn reported that while we switch all interfaces to privacy stable mode
when setting the secret, we don't set this mode for new interfaces. This
does not make sense, so change this behaviour.

Fixes: 622c81d57b ("ipv6: generation of stable privacy addresses for link-local and autoconf")
Reported-by: Bjørn Mork <bjorn@mork.no>
Cc: Bjørn Mork <bjorn@mork.no>
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-15 23:37:32 -05:00
Eric Dumazet 6857a02af5 sctp: use GFP_KERNEL in sctp_init()
modules init functions being called from process context, we better
use GFP_KERNEL allocations to increase our chances to get these
high-order pages we want for SCTP hash tables.

This mostly matters if SCTP module is loaded once memory got fragmented.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-15 23:27:45 -05:00
David S. Miller 5cfe6d8adb Merge branch 'sock-diag-destroy'
Lorenzo Colitti says:

====================
Support administratively closing application sockets

This patchset adds the ability to administratively close a socket
without any action from the process owning the socket or the
socket protocol.

It implements this by adding a new diag_destroy function pointer
to struct proto. In-kernel callers can access this functionality
directly by calling sk->sk_prot->diag_destroy(sk, err).

It also exposes this functionality to userspace via a new
SOCK_DESTROY operation in the NETLINK_SOCK_DIAG sockets. This
allows a privileged userspace process, such as a connection
manager or system administration tool, to close sockets belonging
to other apps when the network they were established on has
disconnected. It is needed on laptops and mobile hosts to ensure
that network switches / disconnects do not result in applications
being blocked for long periods of time (minutes) in read or
connect calls on TCP sockets that will never succeed because the
IP address they are bound to is no longer on the system. Closing
the sockets causes these calls to fail fast and allows the apps
to reconnect on another network.

Userspace intervention is necessary because in many cases the
kernel does not have enough information to know that a connection
is now inoperable. The kernel can know if a packet can't be
routed, but in general it won't know if a TCP connection is stuck
because it is now routed to a network where its source address is
no longer valid [5][6].

Many other operating systems offer similar functionality:

 - FreeBSD has had this since 5.4 in 2005 [2]. It is available
   to privileged userspace and there is a tool to use it [3].
 - The FreeBSD commit description states that the idea came
   from OpenBSD.
 - iOS has been administratively closing app sockets since
   iOS 4 - see [4], which states that a socket "might get
   reclaimed by the kernel" and after that will return EBADF].
   For many years Android kernels have supported this via an
   out-of-tree SIOCKILLADDR ioctl that is called on every
   RTM_DELADDR event, but this solution is cleaner, more robust
   and more flexible: the connection manager can iterate over all
   connections on the deleted IP address and close all of them.
   It can also be used to close all sockets opened by a given app
   process, for example if the user has restricted that app from
   using the network, if a secure network such as a VPN has
   connected and security policy requires all of an application's
   connections to be routed via the VPN, etc.
 - For many years Android kernels have supported an out-of-tree
   SIOCKILLADDR ioctl that is called when a network disconnects
   or an RTM_DELADDR event is received. This solution is cleaner,
   more robust and more flexible. The connection manager can
   implement SIOCKILLADDR by iterating over all connections on
   the deleted IP address and close all of them, but it can also
   close all sockets opened by a given app process (for example
   if the user has restricted that app from), close all of a
   user's TCP connections if a user has connected a secure
   network such as a VPN and expects all of an application's
   connections to be routed via the VPN, etc.

Alternative schemes such as TCP keepalives in combination with
"iptables -j REJECT --reject-with tcp-reset", could be used to
achieve similar results, but on mobile devices TCP keepalives are
very expensive, and in such a scheme detecting stuck connections
has to wait for a keepalive to be sent or the application to
perform a write. An explicit notification from userspace is
cheaper and faster in the common case where an application is
blocked on read.

SOCK_DESTROY is placed behind an INET_DIAG_DESTROY configuration
option, which is currently off by default.

The TCP implementation of diag_destroy causes a TCP ABORT as
specified by RFC 793 [1]: immediately send a RST and clear local
connection state. This is what happens today if an application
enables SO_LINGER with a timeout of 0 and then calls close.

The first versions of the patchset did not send a RST, but that
is not graceful/correct TCP behaviour. tcp_abort now does a
proper RFC 793 ABORT and sends a RST to the peer. This is
consistent with BSD's tcpdrop, and is more correct in general,
even though in many use cases tcp_abort will only be called when
sending a RST is no longer possible (e.g., the network has
disconnected).

The original patchset also behaved like SIOCKILADDR and closed
TCP sockets with ETIMEDOUT. Tom Herbert pointed out that it would
be better if applications could distinguish between a timeout and
an administrative close. ECONNABORTED was chosen because it is
consistent with BSD.

[1] http://tools.ietf.org/html/rfc793#page-50
[2] http://svnweb.freebsd.org/base?view=revision&revision=141381
[3] https://www.freebsd.org/cgi/man.cgi?query=tcpdrop&sektion=8&manpath=FreeBSD+5.4-RELEASE
[4] https://developer.apple.com/library/ios/technotes/tn2277/_index.html#//apple_ref/doc/uid/DTS40010841-CH1-SUBSECTION3
[5] http://www.spinics.net/lists/netdev/msg352775.html
[6] http://www.spinics.net/lists/netdev/msg352952.html
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-15 23:26:52 -05:00
Lorenzo Colitti c1e64e298b net: diag: Support destroying TCP sockets.
This implements SOCK_DESTROY for TCP sockets. It causes all
blocking calls on the socket to fail fast with ECONNABORTED and
causes a protocol close of the socket. It informs the other end
of the connection by sending a RST, i.e., initiating a TCP ABORT
as per RFC 793. ECONNABORTED was chosen for consistency with
FreeBSD.

Signed-off-by: Lorenzo Colitti <lorenzo@google.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-15 23:26:52 -05:00
Lorenzo Colitti 6eb5d2e08f net: diag: Support SOCK_DESTROY for inet sockets.
This passes the SOCK_DESTROY operation to the underlying protocol
diag handler, or returns -EOPNOTSUPP if that handler does not
define a destroy operation.

Most of this patch is just renaming functions. This is not
strictly necessary, but it would be fairly counterintuitive to
have the code to destroy inet sockets be in a function whose name
starts with inet_diag_get.

Signed-off-by: Lorenzo Colitti <lorenzo@google.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-15 23:26:51 -05:00
Lorenzo Colitti 64be0aed59 net: diag: Add the ability to destroy a socket.
This patch adds a SOCK_DESTROY operation, a destroy function
pointer to sock_diag_handler, and a diag_destroy function
pointer.  It does not include any implementation code.

Signed-off-by: Lorenzo Colitti <lorenzo@google.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-15 23:26:51 -05:00
Lorenzo Colitti b613f56ec9 net: diag: split inet_diag_dump_one_icsk into two
Currently, inet_diag_dump_one_icsk finds a socket and then dumps
its information to userspace. Split it into a part that finds the
socket and a part that dumps the information.

Signed-off-by: Lorenzo Colitti <lorenzo@google.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-15 23:26:51 -05:00
David S. Miller fec65bd4e8 Merge branch 'ila-early-demux'
Tom Herbert says:

====================
ila: Optimization to preserve value of early demux

In the current implementation of ILA, LWT is used to perform
translation on both the input and output paths. This is functional,
however there is a big performance hit in the receive path. Early
demux occurs before the routing lookup (a hit actually obviates the
route lookup). Therefore the stack currently performs early
demux before translation so that a local connection with ILA
addresses is never matched. Note that this issue is not just
with ILA, but pretty much any translated or encapsulated packet
handled by LWT would miss the opportunity for early demux. Solving
the general problem seems non trivial since we would need to move
the route lookup before early demx thereby mitigating the value.

This patch set addresses the issue for ILA by adding a fast locator
lookup that occurs before early demux. This done by hooking in to
NF_INET_PRE_ROUTING

For the backend we implement an rhashtable that contains identifier
to locator to mappings. The table also allows more specific matches
that include original locator and interface.

This patch set:
 - Add an rhashtable function to atomically replace and element.
   This is useful to implement sub-trees from a table entry
   without needing to use a special anchor structure as the
   table entry.
 - Add a start callback for starting a netlink dump.
 - Creates an ila directory under net/ipv6 and moves ila.c to it.
   ila.c is split into ila_common.c and ila_lwt.c.
 - Implement a table to do identifier->locator mapping. This is
   an rhashtable (in ila_xlat.c).
 - Configuration for the table with netlink.
 - Add a hook into NF_INET_PRE_ROUTING to perform ILA translation
   before early demux.

Changes in v2:
 - Use iptables targets instead of a new xfrm function

Changes in v3:
 - Add __rcu to next pointer in struct ila_map

Changes in v4:
 - Use hook for NF_INET_PRE_ROUTING

Changed in v5:
 - Register hooks per namespace using nf_register_net_hooks
 - Only register hooks when first mapping is actually added

Changed in v6:
  - Remove gfp argument in alloc_ila_locks, it is unnecessary
  - Set registered_hooks properly when hooks are registered

Testing:
   Running 200 netperf TCP_RR streams

No ILA, baseline
   79.26% CPU utilization
   1678282 tps
   104/189/390 50/90/99% latencies

ILA before fix (LWT on both input and output)
   81.91% CPU utilization
   1464723 tps (-14.5% from baseline)
   121/215/411 50/90/99% latencies

ILA after fix
   80.62% CPU utilization
   1622985 (-3.4% from baseline)
   110/191/347 50/90/99% latencies
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-15 23:25:20 -05:00
Tom Herbert 7f00feaf10 ila: Add generic ILA translation facility
This patch implements an ILA tanslation table. This table can be
configured with identifier to locator mappings, and can be be queried
to resolve a mapping. Queries can be parameterized based on interface,
direction (incoming or outoing), and matching locator.  The table is
implemented using rhashtable and is configured via netlink (through
"ip ila .." in iproute).

The table may be used as alternative means to do do ILA tanslations
other than the lw tunnels

Signed-off-by: Tom Herbert <tom@herbertland.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-15 23:25:20 -05:00
Tom Herbert fc9e50f5a5 netlink: add a start callback for starting a netlink dump
The start callback allows the caller to set up a context for the
dump callbacks. Presumably, the context can then be destroyed in
the done callback.

Signed-off-by: Tom Herbert <tom@herbertland.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-15 23:25:20 -05:00