Right now skb->data is passed to rx_hook() even if the skb
has not been linearised and without giving rx_hook() a way
to linearise it.
Change the rx_hook() interface and make it accept the skb
and the offset to the UDP payload as arguments. rx_hook() is
also renamed to rx_skb_hook() to ensure that out of the tree
users notice the API change.
In this way any rx_skb_hook() implementation can perform all
the needed operations to properly (and safely) access the
skb data.
Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
In every netconsole option that can be set through configfs there's a
race when checking for nt->enabled since it can be modified at the same
time. Probably the most damage can be done by store_enabled when racing
with another instance of itself. Fix all the races with one stone by
moving the mutex lock around the ->store call for all options.
Signed-off-by: Nikolay Aleksandrov <nikolay@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
We need to disable the netconsole (enabled = 0) before setting nt->np.dev
to NULL because otherwise we might still have users after the
netpoll_cleanup() since nt->enabled is set afterwards and we can
have a message which will result in a NULL pointer dereference.
It is very easy to hit dereferences all over the netpoll_send_udp function
by running the following two loops in parallel:
while [ 1 ]; do echo 1 > enabled; echo 0 > enabled; done;
while [ 1 ]; do echo 00:11:22:33:44:55 > remote_mac; done;
(the second loop is to generate messages, it can be done by anything)
We're safe to set nt->np.dev = NULL and nt->enabled = 0 with the spinlock
since it's required in the write_msg() function.
Signed-off-by: Nikolay Aleksandrov <nikolay@redhat.com>
Reviewed-by: Veacelsav Falico <vfalico@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
There is also a C function doing the same thing. Unless the asm code is
110% faster we could stick to the C function.
Signed-off-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
Signed-off-by: David S. Miller <davem@davemloft.net>
Commit 8a07eb0a50 ("sctp: Add ASCONF operation on the single-homed host")
implemented possible use of IPv4 addresses with non SCTP_ADDR_SRC state
as source address when sending ASCONF (ADD) packets, but IPv6 part for
that was not implemented in 8a07eb0a50. Therefore, as this is not restricted
to IPv4-only, fix this up to allow the same for IPv6 addresses in SCTP.
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Cc: Michio Honda <micchie@sfc.wide.ad.jp>
Acked-by: Michio Honda <micchie@sfc.wide.ad.jp>
Acked-by: Vlad Yasevich <vyasevich@gmail.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Pablo Neira Ayuso says:
====================
The following patchset contains three netfilter fixes for your net
tree, they are:
* A couple of fixes to resolve info leak to userspace due to uninitialized
memory area in ulogd, from Mathias Krause.
* Fix instruction ordering issues that may lead to the access of
uninitialized data in x_tables. The problem involves the table update
(producer) and the main packet matching (consumer) routines. Detected in
SMP ARMv7, from Will Deacon.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Pull s390 fixes from Martin Schwidefsky:
"Several last minute bug fixes.
Two of them are on the larger side for rc7, the dasd format patch for
older storage devices and the store-clock-fast patch where we have
been to optimistic with an optimization"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
s390/time: correct use of store clock fast
s390/vmlogrdr: fix array access in vmlogrdr_open()
s390/compat,signal: fix return value of copy_siginfo_(to|from)_user32()
s390/dasd: check for availability of prefix command during format
s390/mm,kvm: fix software dirty bits vs. kvm for old machines
Pull thermal management fixes from Zhang Rui:
"These includes several commits that are necessary to properly fix
regression for TMU test MUX address setting after reset, for exynos
thermal driver.
Specifics:
- fix a regression that the removal of setting a certain field at TMU
configuration setting results in immediately shutdown after reset
on Exynos4412 SoC.
- revert a patch which tries to link the thermal_zone device and its
hwmon node but breaks libsensors.
- fix a deadlock/lockdep warning issue in x86_pkg_temp thermal
driver, which can be reproduced on a buggy platform only.
- fix ti-soc-thermal driver to fall back on bandgap reading when
reading from PCB temperature sensor fails"
* 'for-rc' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux:
Revert "drivers: thermal: parent virtual hwmon with thermal zone"
drivers: thermal: allow ti-soc-thermal run without pcb zone
thermal: exynos: Provide initial setting for TMU's test MUX address at Exynos4412
thermal: exynos: Provide separate TMU data for Exynos4412
thermal: exynos: Remove check for thermal device pointer at exynos_report_trigger()
Thermal: x86_pkg_temp: change spin lock
Fix build error in asus_wmi.c when ASUS_WMI=y and ACPI_VIDEO=m
by preventing that combination.
drivers/built-in.o: In function `asus_wmi_probe':
asus-wmi.c:(.text+0x65ddb4): undefined reference to `acpi_video_unregister'
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Pull media fixes from Mauro Carvalho Chehab:
- Compilation fixes for GCC < 4.4.6
- one Kbuild dependency select fix (selecting videobuf on msi3101)
- driver fixes on tda10071, e4000, msi3101, soc_camera, s5p-jpeg,
saa7134 and adv7511
- some device quirks needed to make them work properly
- some videobuf2 core regression fixes for some features used only on
embedded drivers
* 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media:
[media] saa7134: Fix crash when device is closed before streamoff
[media] adv7511: fix error return code in adv7511_probe()
[media] ths8200: fix compilation with GCC < 4.4.6
[media] ad9389b: fix compilation with GCC < 4.4.6
[media] adv7511: fix compilation with GCC < 4.4.6
[media] adv7842: fix compilation with GCC < 4.4.6
[media] s5p-jpeg: Initialize vfd_decoder->vfl_dir field
[media] videobuf2-dc: Fix support for mappings without struct page in userptr mode
[media] vb2: Allow queuing OUTPUT buffers with zeroed 'bytesused'
[media] mx3-camera: locking cleanup in mx3_videobuf_queue()
[media] sh_vou: almost forever loop in sh_vou_try_fmt_vid_out()
[media] tda10071: change firmware download condition
[media] msi3101: correct max videobuf2 alloc
[media] Add HCL T12Rg-H to STK webcam upside-down table
[media] msi3101: Kconfig select VIDEOBUF2_VMALLOC
[media] msi3101: msi3101_ioctl_ops can be static
[media] e4000: fix PLL calc bug on 32-bit arch
[media] uvcvideo: quirk PROBE_DEF for Microsoft Lifecam NX-3000
[media] uvcvideo: quirk PROBE_DEF for Dell SP2008WFP monitor
Pull networking fixes from David Miller:
"Sorry I let so much accumulate, I was in Buffalo and wanted a few
things to cook in my tree for a while before sending to you. Anyways,
it's a lot of little things as usual at this stage in the game"
1) Make bonding MAINTAINERS entry reflect reality, from Andy
Gospodarek.
2) Fix accidental sock_put() on timewait mini sockets, from Eric
Dumazet.
3) Fix crashes in l2tp due to mis-handling of ipv4 mapped ipv6
addresses, from François CACHEREUL.
4) Fix heap overflow in __audit_sockaddr(), from the eagle eyed Dan
Carpenter.
5) tcp_shifted_skb() doesn't take handle FINs properly, from Eric
Dumazet.
6) SFC driver bug fixes from Ben Hutchings.
7) Fix TX packet scheduling wedge after channel change in ath9k driver,
from Felix Fietkau.
8) Fix user after free in BPF JIT code, from Alexei Starovoitov.
9) Source address selection test is reversed in
__ip_route_output_key(), fix from Jiri Benc.
10) VLAN and CAN layer mis-size netlink attributes, from Marc
Kleine-Budde.
11) Fix permission checks in sysctls to use current_euid() instead of
current_uid(). From Eric W Biederman.
12) IPSEC policies can go away while a timer is still pending for them,
add appropriate ref-counting to fix, from Steffen Klassert.
13) Fix mis-programming of FDR and RMCR registers on R8A7740 sh_eth
chips, from Nguyen Hong Ky and Simon Horman.
14) MLX4 forgets to DMA unmap pages on RX, fix from Amir Vadai.
15) IPV6 GRE tunnel MTU upper limit is miscalculated, from Oussama
Ghorbel.
16) Fix typo in fq_change(), we were assigning "initial quantum" to
"quantum". From Eric Dumazet.
17) Set a more appropriate sk_pacing_rate for non-TCP sockets, otherwise
FQ packet scheduler does not pace those flows properly. Also from
Eric Dumazet.
18) rtlwifi miscalculates packet pointers, from Mark Cave-Ayland.
19) l2tp_xmit_skb() can be called from process context, not just softirq
context, so we must always make sure to BH disable around it. From
Eric Dumazet.
20) On qdisc reset, we forget to purge the RB tree of SKBs in netem
packet scheduler. From Stephen Hemminger.
21) Fix info leak in farsync WAN driver ioctl() handler, from Dan
Carpenter and Salva Peiró.
22) Fix PHY reset and other issues in dm9000 driver, from Nikita
Kiryanov and Michael Abbott.
23) When hardware can do SCTP crc32 checksums, we accidently don't
disable the csum offload when IPSEC transformations have been
applied. From Fan Du and Vlad Yasevich.
24) Tail loss probing in TCP leaves the socket in the wrong congestion
avoidance state. From Yuchung Cheng.
25) In CPSW driver, enable NAPI before interrupts are turned on, from
Markus Pargmann.
26) Integer underflow and dual-assignment in YAM hamradio driver, from
Dan Carpenter.
27) If we are going to mangle a packet in tcp_set_skb_tso_segs() we must
unclone it. This fixes various hard to track down crashes in
drivers where the SKBs ->gso_segs was changing right from underneath
the driver during TX queueing. From Eric Dumazet.
28) Fix the handling of VLAN IDs, and in particular the special IDs 0
and 4095, in the bridging layer. From Toshiaki Makita.
29) Another info leak, this time in wanxl WAN driver, from Salva Peiró.
30) Fix race in socket credential passing, from Daniel Borkmann.
31) WHen NETLABEL is disabled, we don't validate CIPSO packets properly,
from Seif Mazareeb.
32) Fix identification of fragmented frames in ipv4/ipv6 UDP
Fragmentation Offload output paths, from Jiri Pirko.
33) Virtual Function fixes in bnx2x driver from Yuval Mintz and Ariel
Elior.
34) When we removed the explicit neighbour pointer from ipv6 routes a
slight regression was introduced for users such as IPVS, xt_TEE, and
raw sockets. We mix up the users requested destination address with
the routes assigned nexthop/gateway. From Julian Anastasov and
Simon Horman.
35) Fix stack overruns in rt6_probe(), the issue is that can end up
doing two full packet xmit paths at the same time when emitting
neighbour discovery messages. From Hannes Frederic Sowa.
36) davinci_emac driver doesn't handle IFF_ALLMULTI correctly, from
Mariusz Ceier.
37) Make sure to set TCP sk_pacing_rate after the first legitimate RTT
sample, from Neal Cardwell.
38) Wrong netlink attribute passed to xfrm_replay_verify_len(), from
Steffen Klassert.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (152 commits)
ax88179_178a: Add VID:DID for Samsung USB Ethernet Adapter
ax88179_178a: Correct the RX error definition in RX header
Revert "bridge: only expire the mdb entry when query is received"
tcp: initialize passive-side sk_pacing_rate after 3WHS
davinci_emac.c: Fix IFF_ALLMULTI setup
mac802154: correct a typo in ieee802154_alloc_device() prototype
ipv6: probe routes asynchronous in rt6_probe
netfilter: nf_conntrack: fix rt6i_gateway checks for H.323 helper
ipv6: fill rt6i_gateway with nexthop address
ipv6: always prefer rt6i_gateway if present
bnx2x: Set NETIF_F_HIGHDMA unconditionally
bnx2x: Don't pretend during register dump
bnx2x: Lock DMAE when used by statistic flow
bnx2x: Prevent null pointer dereference on error flow
bnx2x: Fix config when SR-IOV and iSCSI are enabled
bnx2x: Fix Coalescing configuration
bnx2x: Unlock VF-PF channel on MAC/VLAN config error
bnx2x: Prevent an illegal pointer dereference during panic
bnx2x: Fix Maximum CoS estimation for VFs
drivers: net: cpsw: fix kernel warn during iperf test with interrupt pacing
...
Correct the definition of AX_RXHDR_CRC_ERR and
AX_RXHDR_DROP_ERR. They are BIT29 and BIT31 in pkt_hdr
seperately.
Signed-off-by: Freddy Xin <freddy@asix.com.tw>
Signed-off-by: David S. Miller <davem@davemloft.net>
While this commit was a good attempt to fix issues occuring when no
multicast querier is present, this commit still has two more issues:
1) There are cases where mdb entries do not expire even if there is a
querier present. The bridge will unnecessarily continue flooding
multicast packets on the according ports.
2) Never removing an mdb entry could be exploited for a Denial of
Service by an attacker on the local link, slowly, but steadily eating up
all memory.
Actually, this commit became obsolete with
"bridge: disable snooping if there is no querier" (b00589af3b)
which included fixes for a few more cases.
Therefore reverting the following commits (the commit stated in the
commit message plus three of its follow up fixes):
====================
Revert "bridge: update mdb expiration timer upon reports."
This reverts commit f144febd93.
Revert "bridge: do not call setup_timer() multiple times"
This reverts commit 1faabf2aab.
Revert "bridge: fix some kernel warning in multicast timer"
This reverts commit c7e8e8a8f7.
Revert "bridge: only expire the mdb entry when query is received"
This reverts commit 9f00b2e7cf.
====================
CC: Cong Wang <amwang@redhat.com>
Signed-off-by: Linus Lüssing <linus.luessing@web.de>
Reviewed-by: Vlad Yasevich <vyasevich@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Do not touch keyboard backlight unless explicitly passed a module
parameter. In this way we won't make wrong assumptions about what are
good default values since they actually are different from model to
model.
The only side effect is that we won't know what is the current value
until set via the sysfs attributes.
Signed-off-by: Mattia Dongili <malattia@linux.it>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Move kernel-doc notation to immediately before its function to eliminate
kernel-doc warnings introduced by commit db14fc3abc ("vfs: add
d_walk()")
Warning(fs/dcache.c:1343): No description found for parameter 'data'
Warning(fs/dcache.c:1343): No description found for parameter 'dentry'
Warning(fs/dcache.c:1343): Excess function parameter 'parent' description in 'check_mount'
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Miklos Szeredi <mszeredi@suse.cz>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Add @path parameter to fix kernel-doc warning.
Also fix a spello/typo.
Warning(fs/namei.c:2304): No description found for parameter 'path'
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
During kernel stability testing on an SMP ARMv7 system, Yalin Wang
reported the following panic from the netfilter code:
1fe0: 0000001c 5e2d3b10 4007e779 4009e110 60000010 00000032 ff565656 ff545454
[<c06c48dc>] (ipt_do_table+0x448/0x584) from [<c0655ef0>] (nf_iterate+0x48/0x7c)
[<c0655ef0>] (nf_iterate+0x48/0x7c) from [<c0655f7c>] (nf_hook_slow+0x58/0x104)
[<c0655f7c>] (nf_hook_slow+0x58/0x104) from [<c0683bbc>] (ip_local_deliver+0x88/0xa8)
[<c0683bbc>] (ip_local_deliver+0x88/0xa8) from [<c0683718>] (ip_rcv_finish+0x418/0x43c)
[<c0683718>] (ip_rcv_finish+0x418/0x43c) from [<c062b1c4>] (__netif_receive_skb+0x4cc/0x598)
[<c062b1c4>] (__netif_receive_skb+0x4cc/0x598) from [<c062b314>] (process_backlog+0x84/0x158)
[<c062b314>] (process_backlog+0x84/0x158) from [<c062de84>] (net_rx_action+0x70/0x1dc)
[<c062de84>] (net_rx_action+0x70/0x1dc) from [<c0088230>] (__do_softirq+0x11c/0x27c)
[<c0088230>] (__do_softirq+0x11c/0x27c) from [<c008857c>] (do_softirq+0x44/0x50)
[<c008857c>] (do_softirq+0x44/0x50) from [<c0088614>] (local_bh_enable_ip+0x8c/0xd0)
[<c0088614>] (local_bh_enable_ip+0x8c/0xd0) from [<c06b0330>] (inet_stream_connect+0x164/0x298)
[<c06b0330>] (inet_stream_connect+0x164/0x298) from [<c061d68c>] (sys_connect+0x88/0xc8)
[<c061d68c>] (sys_connect+0x88/0xc8) from [<c000e340>] (ret_fast_syscall+0x0/0x30)
Code: 2a000021 e59d2028 e59de01c e59f011c (e7824103)
---[ end trace da227214a82491bd ]---
Kernel panic - not syncing: Fatal exception in interrupt
This comes about because CPU1 is executing xt_replace_table in response
to a setsockopt syscall, resulting in:
ret = xt_jumpstack_alloc(newinfo);
--> newinfo->jumpstack = kzalloc(size, GFP_KERNEL);
[...]
table->private = newinfo;
newinfo->initial_entries = private->initial_entries;
Meanwhile, CPU0 is handling the network receive path and ends up in
ipt_do_table, resulting in:
private = table->private;
[...]
jumpstack = (struct ipt_entry **)private->jumpstack[cpu];
On weakly ordered memory architectures, the writes to table->private
and newinfo->jumpstack from CPU1 can be observed out of order by CPU0.
Furthermore, on architectures which don't respect ordering of address
dependencies (i.e. Alpha), the reads from CPU0 can also be re-ordered.
This patch adds an smp_wmb() before the assignment to table->private
(which is essentially publishing newinfo) to ensure that all writes to
newinfo will be observed before plugging it into the table structure.
A dependent-read barrier is also added on the consumer sides, to ensure
the same ordering requirements are also respected there.
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reported-by: Wang, Yalin <Yalin.Wang@sonymobile.com>
Tested-by: Wang, Yalin <Yalin.Wang@sonymobile.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Merge tag 'jfs-3.12' of git://github.com/kleikamp/linux-shaggy
Pull jfs bugfix from David Kleikamp:
"Just a patch to fix an oops in an error path"
* tag 'jfs-3.12' of git://github.com/kleikamp/linux-shaggy:
jfs: fix error path in ialloc
Pull drm fixes from Dave Airlie:
"Travelling slowed down getting these out.
Two vmwgfx fixes, a radeon revert to avoid a regression, i915 fixes,
and some ioctl sizing issues fixed with 32 on 64"
* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
drm/radeon/audio: don't set speaker allocation on DCE4+
drm/radeon: rework audio option
drm/radeon/audio: don't set speaker allocation on DCE3.2
drm/radeon: make missing smc ucode non-fatal (CI)
drm/radeon: make missing smc ucode non-fatal (r7xx-SI)
drm/radeon/uvd: revert lower msg&fb buffer requirements on UVD3
drm/radeon: stop the leaks in cik_ib_test
drm/radeon/atom: workaround vbios bug in transmitter table on rs780
drm/i915: Disable GGTT PTEs on GEN6+ suspend
drm/i915: Make PTE valid encoding optional
drm: Pad drm_mode_get_connector to 64-bit boundary
drm: Prevent overwriting from userspace underallocating core ioctl structs
drm/vmwgfx: Don't kill clients on VT switch
drm/vmwgfx: Don't put resources with invalid id's on lru list
drm/i915: disable LVDS clock gating on CPT v2
Pull HID fixes from Jiri Kosina:
- a partial revert of exponent parsing changes to make "Unit" exponent
item work properly again, by Nikolai Kondrashov
- a few new device IDs additions piggy-backing, by AceLan Kao and David
Herrmann
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid:
HID: wiimote: add LEGO-wiimote VID
HID: Fix unit exponent parsing again
HID: usbhid: quirk for SiS Touchscreen
HID: usbhid: quirk for Synaptics Large Touchccreen
Pull libata fixes from Tejun Heo:
"The only interesting bit is ata_eh_qc_retry() update which fixes a
problem where a SG_IO command may fail across suspend/resume cycle
without the command actually being at fault.
Other changes are low level driver specific and fairly low impact"
* 'for-3.12-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata:
libahci: fix turning on LEDs in ahci_start_port()
libata: make ata_eh_qc_retry() bump scmd->allowed on bogus failures
ahci_platform: use dev_info() instead of printk()
ahci: use dev_info() instead of printk()
pata_isapnp: Don't use invalid I/O ports
Pull cgroup fixes from Tejun Heo:
"Two late fixes for cgroup.
One fixes descendant walk introduced during this rc1 cycle. The other
fixes a post 3.9 bug during task attach which can lead to hang. Both
fixes are critical and the fixes are relatively straight-forward"
* 'for-3.12-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
cgroup: fix to break the while loop in cgroup_attach_task() correctly
cgroup: fix cgroup post-order descendant walk of empty subtree
The result of the store-clock-fast (STCKF) instruction is a bit fuzzy.
It can happen that the value stored on one CPU is smaller than the value
stored on another CPU, although the order of the stores is the other
way around. This can cause deltas of get_tod_clock() values to become
negative when they should not be.
We need to be more careful with store-clock-fast, this patch partially
reverts git commit e4b7b4238e666682555461fa52eecd74652f36bb "time:
always use stckf instead of stck if available". The get_tod_clock()
function now uses the store-clock-extended (STCKE) instruction.
get_tod_clock_fast() can be used if the fuzziness of store-clock-fast
is acceptable e.g. for wait loops local to a CPU.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Most just regression fixes for audio, dpm, and uvd, plus
a resource leak fix for cik.
* 'drm-fixes-3.12' of git://people.freedesktop.org/~agd5f/linux:
drm/radeon/audio: don't set speaker allocation on DCE4+
drm/radeon: rework audio option
drm/radeon/audio: don't set speaker allocation on DCE3.2
drm/radeon: make missing smc ucode non-fatal (CI)
drm/radeon: make missing smc ucode non-fatal (r7xx-SI)
drm/radeon/uvd: revert lower msg&fb buffer requirements on UVD3
drm/radeon: stop the leaks in cik_ib_test
drm/radeon/atom: workaround vbios bug in transmitter table on rs780
Just an lvds clock gating fix and a pte clearing hack for hsw to avoid
memory corruption when hibernating - something doesn't seem to switch off
properly, we're still investigating.
* tag 'drm-intel-fixes-2013-10-21' of git://people.freedesktop.org/~danvet/drm-intel: (96 commits)
drm/i915: Disable GGTT PTEs on GEN6+ suspend
drm/i915: Make PTE valid encoding optional
drm/i915: disable LVDS clock gating on CPT v2
For passive TCP connections, upon receiving the ACK that completes the
3WHS, make sure we set our pacing rate after we get our first RTT
sample.
On passive TCP connections, when we receive the ACK completing the
3WHS we do not take an RTT sample in tcp_ack(), but rather in
tcp_synack_rtt_meas(). So upon receiving the ACK that completes the
3WHS, tcp_ack() leaves sk_pacing_rate at its initial value.
Originally the initial sk_pacing_rate value was 0, so passive-side
connections defaulted to sysctl_tcp_min_tso_segs (2 segs) in skbuffs
made in the first RTT. With a default initial cwnd of 10 packets, this
happened to be correct for RTTs 5ms or bigger, so it was hard to
see problems in WAN or emulated WAN testing.
Since 7eec4174ff ("pkt_sched: fq: fix non TCP flows pacing"), the
initial sk_pacing_rate is 0xffffffff. So after that change, passive
TCP connections were keeping this value (and using large numbers of
segments per skbuff) until receiving an ACK for data.
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Yuchung Cheng <ycheng@google.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
When IFF_ALLMULTI flag is set on interface and IFF_PROMISC isn't,
emac_dev_mcast_set should only enable RX of multicasts and reset
MACHASH registers.
It does this, but afterwards it either sets up multicast MACs
filtering or disables RX of multicasts and resets MACHASH registers
again, rendering IFF_ALLMULTI flag useless.
This patch fixes emac_dev_mcast_set, so that multicast MACs filtering and
disabling of RX of multicasts are skipped when IFF_ALLMULTI flag is set.
Tested with kernel 2.6.37.
Signed-off-by: Mariusz Ceier <mceier+kernel@gmail.com>
Acked-by: Mugunthan V N <mugunthanvnm@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This has no other impact than a cosmetic one.
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Routes need to be probed asynchronous otherwise the call stack gets
exhausted when the kernel attemps to deliver another skb inline, like
e.g. xt_TEE does, and we probe at the same time.
We update neigh->updated still at once, otherwise we would send to
many probes.
Cc: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Julian Anastasov says:
====================
ipv6: use rt6i_gateway as nexthop
The following patchset makes sure that rt6i_gateway
contains valid nexthop information in all cases, so that
we can use different nexthop for sending.
The first patch is a simple fix that makes IPVS, TEE,
RAW(hdrincl) and RTF_DYNAMIC(without RTF_GATEWAY) work as
before 3.9. There is a single corner case not solved by
this patch: RAW(hdrincl) or TEE using local address for
nexthop, a silly feature, I guess. In this case we
see zeroes in rt6i_gateway because we get route that is not
cloned. This is solved only with patch 2.
The second patch is an optimization that makes sure
all resulting routes have rt6i_gateway filled, so that we
can avoid the complex ipv6_addr_any() call added to rt6_nexthop()
by patch 1. And it sets rt6i_gateway for local routes, a case
not handled by patch 1.
The third patch uses the new rt6_nexthop() function to fix
the matching of gateways in the same way as commit bbb5823cf7
("netfilter: nf_conntrack: fix rt_gateway checks for H.323 helper")
fixes nf_conntrack_h323_main.c for IPv4. Currently, it depends on
the new definition of rt6_nexthop() in patch 2. Actually, if
patch 2 is applied, patch 3 becomes a cosmetic change.
I see the following two alternatives for applying these
patches:
1. Linger patch 2 in net-next to avoid surprises in the upcoming
release. In this case patch 3 can be reworked not to depend on
the new rt6_nexthop() definition in patch 2. I guess this is a
better option, so that patch 2 can be reviewed and tested for
longer time.
2. Include all 3 patches in net tree - more risky because this
is my first attempt to change IPv6.
Here is the situation as handled by patch 2:
In IPv6 the resolved routes are always host routes (/128
with DST_HOST), mostly cloned ones. We allow routes in FIB
to contain rt6i_gateway with zeroes (eg. for local subnets) but
on cloning we can fill the rt6i_gateway field in result.
This works even without this patchset.
There is a single special case where dst is provided as
skb_dst directly without a routing call: icmp6_dst_alloc(). It is a
private dst allocated just for the particular ICMP packet. Patch 2
fills rt6i_gateway in this case, needed for the new rt6_nexthop()
simplification.
The last case is addrconf_dst_alloc(), it can put in
FIB local/anycast routes when addresses are added. Patch 2
needs to fill rt6i_gateway in this case because such routes
are returned without cloning.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Now when rt6_nexthop() can return nexthop address we can use it
for proper nexthop comparison of directly connected destinations.
For more information refer to commit bbb5823cf7
("netfilter: nf_conntrack: fix rt_gateway checks for H.323 helper").
Signed-off-by: Julian Anastasov <ja@ssi.bg>
Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Make sure rt6i_gateway contains nexthop information in
all routes returned from lookup or when routes are directly
attached to skb for generated ICMP packets.
The effect of this patch should be a faster version of
rt6_nexthop() and the consideration of local addresses as
nexthop.
Signed-off-by: Julian Anastasov <ja@ssi.bg>
Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
In v3.9 6fd6ce2056 ("ipv6: Do not depend on rt->n in
ip6_finish_output2()." changed the behaviour of ip6_finish_output2()
such that the recently introduced rt6_nexthop() is used
instead of an assigned neighbor.
As rt6_nexthop() prefers rt6i_gateway only for gatewayed
routes this causes a problem for users like IPVS, xt_TEE and
RAW(hdrincl) if they want to use different address for routing
compared to the destination address.
Another case is when redirect can create RTF_DYNAMIC
route without RTF_GATEWAY flag, we ignore the rt6i_gateway
in rt6_nexthop().
Fix the above problems by considering the rt6i_gateway if
present, so that traffic routed to address on local subnet is
not wrongly diverted to the destination address.
Thanks to Simon Horman and Phil Oester for spotting the
problematic commit.
Thanks to Hannes Frederic Sowa for his review and help in testing.
Reported-by: Phil Oester <kernel@linuxace.com>
Reported-by: Mark Brooks <mark@loadbalancer.org>
Signed-off-by: Julian Anastasov <ja@ssi.bg>
Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Yuval Mintz says:
====================
bnx2x: Bug fixes patch series
This patch series contains fixes for various flows - several SR-IOV issues
are fixed, ethtool callbacks (coalescing and register dump) are corrected,
null pointer dereference on error flows is prevented, etc.
Changes from V1
---------------
- Patch 2 "bnx2x: Prevent an illegal pointer dereference during panic"
is revised, with improved handling of edge cases.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Current driver implementation incorrectly sets the flag only if 64-bit
DMA mask succeeded.
Signed-off-by: Merav Sicron <meravs@broadcom.com>
Signed-off-by: Yuval Mintz <yuvalmin@broadcom.com>
Signed-off-by: Ariel Elior <ariele@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
As part of a register dump, the interface pretends to have the identity
of other interfaces of the same physical device in order to perform
HW configuration for them - specifically, it needs to prevent attentions
from generating on those functions as the register dump accesses registers
in common blocks which whose reading might generate an attention.
However, such pretension is unsafe - unlike other flows in which the driver
uses pretend, during register dump there is no guarantee no other HW access
will take place (by other flows). If such access will take place, the HW will
be accessed by the wrong interface, and leave both functions in an incorrect
state.
This patch removes all pretensions from the register dump flow. Instead, it
changes initial configuration of attentions such that no fatal attention will
be generated for other functions as a result of the register dump
(notice however, a debug print claiming an attention from other functions IS
possible during the register dump)
Signed-off-by: Dmitry Kravkov <dmitry@broadcom.com>
Signed-off-by: Yuval Mintz <yuvalmin@broadcom.com>
Signed-off-by: Ariel Elior <ariele@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
bnx2x has several clients to its DMAE machines - all of them with the exception
of the statistics flow used the same locking mechanisms to synchronize the DMAE
machines' usage.
Since statistics (which are periodically entered) use DMAE without taking the
locks, they may erase the commands which were previously set -
e.g., it may cause a VF to timeout while waiting for a PF answer on the VF-PF
channel as that command header would have been overwritten by the statistics'
header.
This patch makes certain that all flows utilizing DMAE will use the same
API, assuring that the locking scheme will be kept by all said flows.
Signed-off-by: Ariel Elior <ariele@broadcom.com>
Signed-off-by: Yuval Mintz <yuvalmin@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
If debug message is open and bnx2x_vfop_qdtor_cmd() were to fail,
the resulting print would have caused a null pointer dereference.
Signed-off-by: Yuval Mintz <yuvalmin@broadcom.com>
Signed-off-by: Ariel Elior <ariele@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Starting with commit b9871bc "bnx2x: VF RSS support - PF side", if a PF will
have SR-IOV supported in its PCI configuration space, storage drivers will not
work for that interface.
This patch fixes the resource calculation to allow such a configuration to
properly work.
Signed-off-by: Ariel Elior <ariele@broadcom.com>
Signed-off-by: Yuval Mintz <yuvalmin@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
bnx2x drivers configure coalescing incorrectly (e.g., as a result of a call
to 'ethtool -c'). Although this is almost invisible to the user (due to NAPI)
designated tests will show the configuration is incorrect.
Signed-off-by: Dmitry Kravkov <dmitry@broadcom.com>
Signed-off-by: Yuval Mintz <yuvalmin@broadcom.com>
Signed-off-by: Ariel Elior <ariele@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Current code returns upon failure, leaving the VF-PF in an unusable state;
This patch adds the missing release so further commands could pass between
PF and VF.
Signed-off-by: Ariel Elior <ariele@broadcom.com>
Signed-off-by: Yuval Mintz <yuvalmin@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
During a panic, the driver tries to print the Management FW buffer of recent
commands. To do so, the driver reads the address of that buffer from a known
address. If the buffer is unavailable (e.g., PCI reads don't work, MCP is
failing, etc.), the driver will try to access the address it has read, possibly
causing a kernel panic.
This check 'sanitizes' the access, validating the read value is indeed a valid
address inside the management FW's buffers.
The patch also removes a read outside the scope of the buffer, which resulted
in some unrelated chraracters appearing in the log.
Signed-off-by: Yuval Mintz <yuvalmin@broadcom.com>
Signed-off-by: Dmitry Kravkov <dmitry@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
bnx2x VFs do not support Multi-CoS; Current implementation
erroneously sets the VFs maximal number of CoS to be > 1.
This will cause the driver to call alloc_etherdev_mqs() with
a number of queues it cannot possibly support and reflects
in 'odd' driver prints.
Signed-off-by: Yuval Mintz <yuvalmin@broadcom.com>
Signed-off-by: Ariel Elior <ariele@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The create_flow/destroy_flow uverbs and the associated extensions to
the user-kernel verbs ABI are under review and are too experimental to
freeze at this point.
So userspace is not exposed to experimental features and an uinstable
ABI, temporarily disable this for v3.12 (with a Kconfig option behind
staging to reenable it if desired).
The feature will be enabled after proper cleanup for v3.13.
Signed-off-by: Yann Droneaud <ydroneaud@opteya.com>
Link: http://marc.info/?i=cover.1381351016.git.ydroneaud@opteya.com
Link: http://marc.info/?i=cover.1381177342.git.ydroneaud@opteya.com
[ Add a Kconfig option to reenable these verbs. - Roland ]
Signed-off-by: Roland Dreier <roland@purestorage.com>
The LEGO-wiimote uses a different VID than the Nintendo ID. The device is
technically the same so add the ID.
Cc: <stable@vger.kernel.org> # 3.11+
Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
