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this patch adds all of eBPF verfier documentation and empty bpf_check()
The end goal for the verifier is to statically check safety of the program.
Verifier will catch:
- loops
- out of range jumps
- unreachable instructions
- invalid instructions
- uninitialized register access
- uninitialized stack access
- misaligned stack access
- out of range stack access
- invalid calling convention
More details in Documentation/networking/filter.txt
Signed-off-by: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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BPF syscall is a multiplexor for a range of different operations on eBPF.
This patch introduces syscall with single command to create a map.
Next patch adds commands to access maps.
'maps' is a generic storage of different types for sharing data between kernel
and userspace.
Userspace example:
/* this syscall wrapper creates a map with given type and attributes
* and returns map_fd on success.
* use close(map_fd) to delete the map
*/
int bpf_create_map(enum bpf_map_type map_type, int key_size,
int value_size, int max_entries)
{
union bpf_attr attr = {
.map_type = map_type,
.key_size = key_size,
.value_size = value_size,
.max_entries = max_entries
};
return bpf(BPF_MAP_CREATE, &attr, sizeof(attr));
}
'union bpf_attr' is backwards compatible with future extensions.
More details in Documentation/networking/filter.txt and in manpage
Signed-off-by: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Add the device tree bindings documentation for the Amlogic Meson
variant of the Synopsys DesignWare MAC.
Signed-off-by: Beniamino Galvani <b.galvani@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media
Pull media fixes from Mauro Carvalho Chehab:
"For some last time fixes:
- a regression detected on Kernel 3.16 related to VBI Teletext
application breakage on drivers using videobuf2 (see
https://bugzilla.kernel.org/show_bug.cgi?id=84401). The bug was
noticed on saa7134 (migrated to VB2 on 3.16), but also affects
em28xx (migrated on 3.9 to VB2);
- two additional sanity checks at videobuf2;
- two fixups to restore proper VBI support at the em28xx driver;
- two Kernel oops fixups (at cx24123 and cx2341x drivers);
- a bug at adv7604 where an if was doing just the opposite as it
would be expected;
- some documentation fixups to match the behavior defined at the
Kernel"
* tag 'media/v3.17-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media:
[media] em28xx-v4l: get rid of field "users" in struct em28xx_v4l2"
[media] em28xx: fix VBI handling logic
[media] DocBook media: improve the poll() documentation
[media] DocBook media: fix the poll() 'no QBUF' documentation
[media] vb2: fix VBI/poll regression
[media] cx2341x: fix kernel oops
[media] cx24123: fix kernel oops due to missing parent pointer
[media] adv7604: fix inverted condition
[media] media/radio: fix radio-miropcm20.c build with io.h header file
[media] vb2: fix plane index sanity check in vb2_plane_cookie()
[media] DocBook media: update version number and V4L2 changes
[media] DocBook media: fix fieldname in struct v4l2_subdev_selection
[media] vb2: fix vb2 state check when start_streaming fails
[media] videobuf2-core.h: fix comment
[media] videobuf2-core: add comments before the WARN_ON
[media] videobuf2-dma-sg: fix for wrong GFP mask to sg_alloc_table_from_pages
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Current ICMP rate limiting uses inetpeer cache, which is an RBL tree
protected by a lock, meaning that hosts can be stuck hard if all cpus
want to check ICMP limits.
When say a DNS or NTP server process is restarted, inetpeer tree grows
quick and machine comes to its knees.
iptables can not help because the bottleneck happens before ICMP
messages are even cooked and sent.
This patch adds a new global limitation, using a token bucket filter,
controlled by two new sysctl :
icmp_msgs_per_sec - INTEGER
Limit maximal number of ICMP packets sent per second from this host.
Only messages whose type matches icmp_ratemask are
controlled by this limit.
Default: 1000
icmp_msgs_burst - INTEGER
icmp_msgs_per_sec controls number of ICMP packets sent per second,
while icmp_msgs_burst controls the burst size of these packets.
Default: 50
Note that if we really want to send millions of ICMP messages per
second, we might extend idea and infra added in commit 04ca6973f7c1a
("ip: make IP identifiers less predictable") :
add a token bucket in the ip_idents hash and no longer rely on inetpeer.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Conflicts:
arch/mips/net/bpf_jit.c
drivers/net/can/flexcan.c
Both the flexcan and MIPS bpf_jit conflicts were cases of simple
overlapping changes.
Signed-off-by: David S. Miller <davem@davemloft.net>
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Pull networking fixes from David Miller:
1) If the user gives us a msg_namelen of 0, don't try to interpret
anything pointed to by msg_name. From Ani Sinha.
2) Fix some bnx2i/bnx2fc randconfig compilation errors.
The gist of the issue is that we firstly have drivers that span both
SCSI and networking. And at the top of that chain of dependencies
we have things like SCSI_FC_ATTRS and SCSI_NETLINK which are
selected.
But since select is a sledgehammer and ignores dependencies,
everything to select's SCSI_FC_ATTRS and/or SCSI_NETLINK has to also
explicitly select their dependencies and so on and so forth.
Generally speaking 'select' is supposed to only be used for child
nodes, those which have no dependencies of their own. And this
whole chain of dependencies in the scsi layer violates that rather
strongly.
So just make SCSI_NETLINK depend upon it's dependencies, and so on
and so forth for the things selecting it (either directly or
indirectly).
From Anish Bhatt and Randy Dunlap.
3) Fix generation of blackhole routes in IPSEC, from Steffen Klassert.
4) Actually notice netdev feature changes in rtl_open() code, from
Hayes Wang.
5) Fix divide by zero in bond enslaving, from Nikolay Aleksandrov.
6) Missing memory barrier in sunvnet driver, from David Stevens.
7) Don't leave anycast addresses around when ipv6 interface is
destroyed, from Sabrina Dubroca.
8) Don't call efx_{arch}_filter_sync_rx_mode before addr_list_lock is
initialized in SFC driver, from Edward Cree.
9) Fix missing DMA error checking in 3c59x, from Neal Horman.
10) Openvswitch doesn't emit OVS_FLOW_CMD_NEW notifications accidently,
fix from Samuel Gauthier.
11) pch_gbe needs to select NET_PTP_CLASSIFY otherwise we can get a
build error.
12) Fix macvlan regression wherein we stopped emitting
broadcast/multicast frames over software devices. From Nicolas
Dichtel.
13) Fix infiniband bug due to unintended overflow of skb->cb[], from
Eric Dumazet. And add an assertion so this doesn't happen again.
14) dm9000_parse_dt() should return error pointers, not NULL. From
Tobias Klauser.
15) IP tunneling code uses this_cpu_ptr() in preemptible contexts, fix
from Eric Dumazet.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (87 commits)
net: bcmgenet: call bcmgenet_dma_teardown in bcmgenet_fini_dma
net: bcmgenet: fix TX reclaim accounting for fragments
ipv4: do not use this_cpu_ptr() in preemptible context
dm9000: Return an ERR_PTR() in all error conditions of dm9000_parse_dt()
r8169: fix an if condition
r8152: disable ALDPS
ipoib: validate struct ipoib_cb size
net: sched: shrink struct qdisc_skb_cb to 28 bytes
tg3: Work around HW/FW limitations with vlan encapsulated frames
macvlan: allow to enqueue broadcast pkt on virtual device
pch_gbe: 'select' NET_PTP_CLASSIFY.
scsi: Use 'depends' with LIBFC instead of 'select'.
openvswitch: restore OVS_FLOW_CMD_NEW notifications
genetlink: add function genl_has_listeners()
lib: rhashtable: remove second linux/log2.h inclusion
net: allow macvlans to move to net namespace
3c59x: Fix bad offset spec in skb_frag_dma_map
3c59x: Add dma error checking and recovery
sparc: bpf_jit: fix support for ldx/stx mem and SKF_AD_VLAN_TAG
can: at91_can: add missing prepare and unprepare of the clock
...
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The poll documentation was incomplete: document how events (POLLPRI)
are handled and fix the documentation of what poll does for display devices
and streaming I/O.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
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Clarify what poll() returns if STREAMON was called but not QBUF.
Make explicit the different behavior for this scenario for
capture and output devices.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
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Note: the revision text for the v4l2_pix_format change from Laurent
erroneously mentioned 3.16 when it only got merged for 3.17. Fixed
that as well.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
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Field 'rect' is really named 'r'.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Pull sound fixes from Takashi Iwai:
"All small fixes in random various drivers, mostly for ASoC at this
time, which look reasonable for a high rc number"
* tag 'sound-3.17-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
ASoC: rockchip-i2s: dt: swap tx and rx channed request number in example
ASoC: rockchip-i2s: fix registers' property of rockchip i2s controller
ASoC: rockchip-i2s: fix master mode set bit error
ASoC: cs4265: Fix register address to set the proper data type.
ALSA: hda - Fix invalid pin powermap without jack detection
ASoC: soc-pcm: fix dpcm_path_get error handling
ASoC: samsung-i2s: Check secondary DAI exists before referencing
ASoC: Update email id of the author
ASoC: dwc: Update email id of the author
ASoC: davinci-mcasp: Correct rx format unit configuration
ASoC: tlv320aic31xx: Fix 24bit samples with I2S format and 12MHz mclk
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git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi
Pull spi fixes from Mark Brown:
"A few driver specific fixes for v3.17:
- Fix davinci so that GPIO chip selects work with deferred probe of
GPIOs (which could happen in production depending on kernel config)
plus one incremental stylistic fix to that.
- Several fixes for the newly introduced rockchip driver that came up
in wider testing of the device.
- A couple of small things in the sirf driver, one bug that would
stop DMA transfers working and another update to follow the
documented procedure in the datasheet.
- Fix some memory leaks with devm_kzalloc() being used outside of the
device bind path"
* tag 'spi-v3.17-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi:
spi: davinci: remove empty function davinci_spi_cleanup
spi: davinci: request cs_gpio's from probe
spi/pl022: Fix error message
spi/rockchip: Mark DMA as optional
spi/rockchip: Don't warn if SPI is busy but disabled
spi/rockchip: Fix the wait_for_idle() timeout
spi: sirf: add fifo reset/start for cmd transfer
spi: sirf: enable RX_IO_DMA_INT interrupt
spi: dw: Don't use devm_kzalloc in master->setup callback
spi: fsl: Don't use devm_kzalloc in master->setup callback
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'spi/fix/fsl', 'spi/fix/pl022', 'spi/fix/rockchip' and 'spi/fix/sirf' into spi-linus
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git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
Pull input updates from Dmitry Torokhov:
"A few quirks for i8042/AT keyboards and a small device tree doc fix
for Atmel Touchscreens"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
Input: atmel_mxt_ts - fix merge in DT documentation
Input: i8042 - also set the firmware id for MUXed ports
Input: i8042 - add nomux quirk for Avatar AVIU-145A6
Input: i8042 - add Fujitsu U574 to no_timeout dmi table
Input: atkbd - do not try 'deactivate' keyboard on any LG laptops
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'asoc/fix/rockchip', 'asoc/fix/samsung' and 'asoc/fix/tlv320aic31xx' into asoc-linus
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This patch update fec devicetree binding doc that add Optional
properties "fsl,num-tx-queues" and "fsl,num-rx-queues".
Signed-off-by: Fugang Duan <B38611@freescale.com>
Signed-off-by: Frank Li <Frank.Li@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Reference to RK3288 TRM, fix an error channel id for i2s tx and rx
Table 10-1 DMAC_BUS Request Mapping Table
Req number Source Polarity
0 I2S tx High level
1 I2S rx High level
Tested on RK3288 board.
Signed-off-by: Jianqun <jay.xu@rock-chips.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
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This reverts commit c801e3cc1925 ("ipv4: Clarify in docs that accept_local requires rp_filter.").
It is not needed anymore since commit 1dced6a85482 ("ipv4: Restore accept_local behaviour in fib_validate_source()").
Suggested-by: Julian Anastasov <ja@ssi.bg>
Cc: Gregory Detal <gregory.detal@uclouvain.be>
Cc: Christoph Paasch <christoph.paasch@uclouvain.be>
Cc: Hannes Frederic Sowa <hannes@redhat.com>
Cc: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Sébastien Barré <sebastien.barre@uclouvain.be>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Pull USB fixes from Greg KH:
"Here are some USB and PHY fixes for 3.17-rc5.
Nothing major here, just a number of tiny fixes for reported issues,
and some new device ids as well.
All have been tested in linux-next"
* tag 'usb-3.17-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (46 commits)
xhci: fix oops when xhci resumes from hibernate with hw lpm capable devices
usb: xhci: Fix OOPS in xhci error handling code
xhci: Fix null pointer dereference if xhci initialization fails
storage: Add single-LUN quirk for Jaz USB Adapter
uas: Add missing le16_to_cpu calls to asm1051 / asm1053 usb-id check
usb: chipidea: msm: Initialize PHY on reset event
usb: chipidea: msm: Use USB PHY API to control PHY state
usb: hub: take hub->hdev reference when processing from eventlist
uas: Disable uas on ASM1051 devices
usb: dwc2/gadget: avoid disabling ep0
usb: dwc2/gadget: delay enabling irq once hardware is configured properly
usb: dwc2/gadget: do not call disconnect method in pullup
usb: dwc2/gadget: break infinite loop in endpoint disable code
usb: dwc2/gadget: fix phy initialization sequence
usb: dwc2/gadget: fix phy disable sequence
uwb: init beacon cache entry before registering uwb device
USB: ftdi_sio: Add support for GE Healthcare Nemo Tracker device
USB: document the 'u' flag for usb-storage quirks parameter
usb: host: xhci: fix compliance mode workaround
usb: dwc3: fix TRB completion when multiple TRBs are started
...
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git://git.kernel.org/pub/scm/linux/kernel/git/tomba/linux
Pull fbdev fixes from Tomi Valkeinen:
"Minor fixes for amba-clcd and video DT bindings"
* tag 'fbdev-fixes-3.17' of git://git.kernel.org/pub/scm/linux/kernel/git/tomba/linux:
video: ARM CLCD: Fix color model capabilities for DT platforms
video: fix composite video connector compatible string
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Something went a bit wrong in merging f5940231a - there's a bit of repeated
text that's been introduced.
Signed-off-by: Nick Dyer <nick.dyer@itdev.co.uk>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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Pull dmaengine fixes from Vinod Koul:
"Two minor fixes.
First one from Kuninori clarifying dmas bindings and second from Lars
for fixing dma descriptor completion in non cyclic case"
* 'fixes' of git://git.infradead.org/users/vkoul/slave-dma:
dmaengine: jz4740: Fix non-cyclic descriptor completion
dt/bindings: rcar-audmapp: tidyup dmas explanation
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MIPS supports BPF JIT since v3.16-rc1
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Daniel Borkmann <dborkman@redhat.com>
Cc: Alexei Starovoitov <ast@plumgrid.com>
Cc: linux-doc@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Acked-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Acked-by: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This adds the necessary binding documentation for the EMAC Rockchip platform
driver found in RK3066 and RK3188 SoCs.
Signed-off-by: Romain Perier <romain.perier@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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add BPF_LD_IMM64 instruction to load 64-bit immediate value into a register.
All previous instructions were 8-byte. This is first 16-byte instruction.
Two consecutive 'struct bpf_insn' blocks are interpreted as single instruction:
insn[0].code = BPF_LD | BPF_DW | BPF_IMM
insn[0].dst_reg = destination register
insn[0].imm = lower 32-bit
insn[1].code = 0
insn[1].imm = upper 32-bit
All unused fields must be zero.
Classic BPF has similar instruction: BPF_LD | BPF_W | BPF_IMM
which loads 32-bit immediate value into a register.
x64 JITs it as single 'movabsq %rax, imm64'
arm64 may JIT as sequence of four 'movk x0, #imm16, lsl #shift' insn
Note that old eBPF programs are binary compatible with new interpreter.
It helps eBPF programs load 64-bit constant into a register with one
instruction instead of using two registers and 4 instructions:
BPF_MOV32_IMM(R1, imm32)
BPF_ALU64_IMM(BPF_LSH, R1, 32)
BPF_MOV32_IMM(R2, imm32)
BPF_ALU64_REG(BPF_OR, R1, R2)
User space generated programs will use this instruction to load constants only.
To tell kernel that user space needs a pointer the _pseudo_ variant of
this instruction may be added later, which will use extra bits of encoding
to indicate what type of pointer user space is asking kernel to provide.
For example 'off' or 'src_reg' fields can be used for such purpose.
src_reg = 1 could mean that user space is asking kernel to validate and
load in-kernel map pointer.
src_reg = 2 could mean that user space needs readonly data section pointer
src_reg = 3 could mean that user space needs a pointer to per-cpu local data
All such future pseudo instructions will not be carrying the actual pointer
as part of the instruction, but rather will be treated as a request to kernel
to provide one. The kernel will verify the request_for_a_pointer, then
will drop _pseudo_ marking and will store actual internal pointer inside
the instruction, so the end result is the interpreter and JITs never
see pseudo BPF_LD_IMM64 insns and only operate on generic BPF_LD_IMM64 that
loads 64-bit immediate into a register. User space never operates on direct
pointers and verifier can easily recognize request_for_pointer vs other
instructions.
Signed-off-by: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Commit d24d481b7d36 (usb-storage: Modify and export adjust_quirks so
that it can be used by uas) added the 'u' flag to the quirks module
parameter for usb-storage, but neglected to update the
documentation. This patch adds the documentation.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Cc: stable <stable@vger.kernel.org> # 3.15+
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Pull networking fixes from David Miller:
1) Fix skb leak in mac802154, from Martin Townsend
2) Use select not depends on NF_NAT for NFT_NAT, from Pablo Neira
Ayuso
3) Fix union initializer bogosity in vxlan, from Gerhard Stenzel
4) Fix RX checksum configuration in stmmac driver, from Giuseppe
CAVALLARO
5) Fix TSO with non-accelerated VLANs in e1000, e1000e, bna, ehea,
i40e, i40evf, mvneta, and qlge, from Vlad Yasevich
6) Fix capability checks in phy_init_eee(), from Giuseppe CAVALLARO
7) Try high order allocations more sanely for SKBs, specifically if a
high order allocation fails, fall back directly to zero order pages
rather than iterating down one order at a time. From Eric Dumazet
8) Fix a memory leak in openvswitch, from Li RongQing
9) amd-xgbe initializes wrong spinlock, from Thomas Lendacky
10) RTNL locking was busted in setsockopt for anycast and multicast, fix
from Sabrina Dubroca
11) Fix peer address refcount leak in ipv6, from Nicolas Dichtel
12) DocBook typo fixes, from Masanari Iida
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (101 commits)
ipv6: restore the behavior of ipv6_sock_ac_drop()
amd-xgbe: Enable interrupts for all management counters
amd-xgbe: Treat certain counter registers as 64 bit
greth: moved TX ring cleaning to NAPI rx poll func
cnic : Cleanup CONFIG_IPV6 & VLAN check
net: treewide: Fix typo found in DocBook/networking.xml
bnx2x: Fix link problems for 1G SFP RJ45 module
3c59x: avoid panic in boomerang_start_xmit when finding page address:
netfilter: add explicit Kconfig for NETFILTER_XT_NAT
ipv6: use addrconf_get_prefix_route() to remove peer addr
ipv6: fix a refcnt leak with peer addr
net-timestamp: only report sw timestamp if reporting bit is set
drivers/net/fddi/skfp/h/skfbi.h: Remove useless PCI_BASE_2ND macros
l2tp: fix race while getting PMTU on PPP pseudo-wire
ipv6: fix rtnl locking in setsockopt for anycast and multicast
VMXNET3: Check for map error in vmxnet3_set_mc
openvswitch: distinguish between the dropped and consumed skb
amd-xgbe: Fix initialization of the wrong spin lock
openvswitch: fix a memory leak
netfilter: fix missing dependencies in NETFILTER_XT_TARGET_LOG
...
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new link for - How to piss off a Linux kernel subsystem maintainer
Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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The NFS/RDMA Kconfig symbol was split into separate options for client
and server in commit 2e8c12e1b765 ("xprtrdma: add separate Kconfig
options for NFSoRDMA client and server support").
Update the documentation to reflect this split.
Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: "J. Bruce Fields" <bfields@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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hpfall.c was renamed to freefall.c in 3.16, but this file still refer to
hpfall.c instead of freefall.c
Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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The example code provided with the i2c device interface documentation
won't compile since it uses the reserved word "register" to name a
variable.
The compiler fails with this error message:
error: expected identifier or '(' before '=' token
__u8 register = 0x20; /* Device register to access */
^
Rename the variable "register" to simply "reg" in the example code.
Another couple of typos has been fixed as well.
[Change "! =" to "!=".]
Signed-off-by: Jose Alarcon Roldan <jose.alarcon.roldan@gmail.com>
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Acked-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Despite the fact that these functions have been around for years, they
are little used (only 15 uses in 13 files at the preseht time) even
though many other files use work-arounds to achieve the same result.
By documenting them, hopefully they will become more widely used.
Signed-off-by: Rob Jones <rob.jones@codethink.co.uk>
Acked-by: Steven Whitehouse <swhiteho@redhat.com>
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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A buffer is incorrectly zeroed to the length of the pointer. If
cfg_payload_len < sizeof(void *) this can overwrites unrelated memory.
The buffer contents are never read, so no need to zero.
Fixes: 8fe2f761cae9 ("net-timestamp: expand documentation")
Reported-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator
Pull regulator documentation fixes from Mark Brown:
"All the fixes people have found for the regulator API have been
documentation fixes, avoiding warnings while building the kerneldoc,
fixing some errors in one of the DT bindings documents and fixing some
typos in the header"
* tag 'regulator-v3.17-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator:
regulator: fix kernel-doc warnings in header files
regulator: Proofread documentation
regulator: tps65090: Fix tps65090 typos in example
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git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio
Pull GPIO fixes from Linus Walleij:
- some documentation sync
- resource leak in the bt8xx driver
- again fix the way varargs are used to handle the optional flags on
the gpiod_* accessors. Now hopefully nailed the entire problem.
* tag 'gpio-v3.17-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio:
gpio: move varargs hack outside #ifdef GPIOLIB
gpio: bt8xx: fix release of managed resources
Documentation: gpio: documentation for optional getters functions
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'regulator/fix/tps65090' into regulator-linus
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As in IPv6 people might increase the igmp query robustness variable to
make sure unsolicited state change reports aren't lost on the network. Add
and document this new knob to igmp code.
RFCs allow tuning this parameter back to first IGMP RFC, so we also use
this setting for all counters, including source specific multicast.
Also take over sysctl value when upping the interface and don't reuse
the last one seen on the interface.
Cc: Flavio Leitner <fbl@redhat.com>
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Acked-by: Flavio Leitner <fbl@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This patch adds a new sysctl_mld_qrv knob to configure the mldv1/v2 query
robustness variable. It specifies how many retransmit of unsolicited mld
retransmit should happen. Admins might want to tune this on lossy links.
Also reset mld state on interface down/up, so we pick up new sysctl
settings during interface up event.
IPv6 certification requests this knob to be available.
I didn't make this knob netns specific, as it is mostly a setting in a
physical environment and should be per host.
Cc: Flavio Leitner <fbl@redhat.com>
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Acked-by: Flavio Leitner <fbl@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The Rockchip SPI controller works fine without DMA (aside from a few
warnings). The DMA property even implies this, saying:
DMA request names should include "tx" and "rx" if present.
Officially mark the properties as optional.
Signed-off-by: Doug Anderson <dianders@chromium.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Pull sound fixes from Takashi Iwai:
"This time it contains a bunch of small ASoC fixes that slipped from in
previous updates, in addition to the usual HD-audio fixes and the
regression fixes for FireWire updates in 3.17.
All commits are reasonably small fixes"
* tag 'sound-3.17-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
ALSA: hda - Fix COEF setups for ALC1150 codec
ASoC: simple-card: Fix bug of wrong decrement DT node's refcount
ALSA: hda - Fix digital mic on Acer Aspire 3830TG
ASoC: omap-twl4030: Fix typo in 2nd dai link's platform_name
ALSA: firewire-lib/dice: add arrangements of PCM pointer and interrupts for Dice quirk
ALSA: dice: fix wrong channel mappping at higher sampling rate
ASoC: cs4265: Fix setting of functional mode and clock divider
ASoC: cs4265: Fix clock rates in clock map table
ASoC: rt5677: correct mismatch widget name
ASoC: rt5640: Do not allow regmap to use bulk read-write operations
ASoC: tegra: Fix typo in include guard
ASoC: da732x: Fix typo in include guard
ASoC: core: fix .info for SND_SOC_BYTES_TLV
ASoC: rcar: Use && instead of & for boolean expressions
ASoC: Use dev_set_name() instead of init_name
ASoC: axi: Fix ADI AXI SPDIF specification
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git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
Pull input subsystem updates from Dmitry Torokhov:
"A fix for MT breakage, enhancement to Elantech PS/2 driver and a
couple of assorted fixes"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
Input: elantech - add support for trackpoint found on some v3 models
Input: elantech - reset the device when elantech probe fails
Input: ALPS - suppress message about 'Unknown touchpad'
Input: fix used slots detection breakage
Input: sparc - i8042-sparcio.h: fix unused kbd_res warning
Input: atmel_mxt_ts - improve description of gpio-keymap property
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Add compatible string for imx6sx-usbphy.
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
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The quite-recently-added analog-tv-connector bindings say that the
compatible string for composite video connector is
"composite-connector". That string is also used in the omap3-n900.dts
file. However, the connector driver uses "composite-video-connector", so
this has never worked.
While changing the driver's compatible string to "composite-connector"
would be safer, as published DT bindings should not be changed, I'd
rather fix the bindings in this case for two reasons:
* composite-connector is a bit too generic name, as it doesn't even hint
at video.
* it's clear that this has never worked, which means no one has used
those bindings, which should make it safe to change this.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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'asoc/fix/da732x', 'asoc/fix/omap', 'asoc/fix/rsnd', 'asoc/fix/rt5640', 'asoc/fix/rt5677', 'asoc/fix/simple' and 'asoc/fix/tegra' into asoc-linus
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Expand Documentation/networking/timestamping.txt with new
interfaces and bytestream timestamping. Also minor
cleanup of the other text.
Import txtimestamp.c test of the new features.
Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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TIPC name table updates are distributed asynchronously in a cluster,
entailing a risk of certain race conditions. E.g., if two nodes
simultaneously issue conflicting (overlapping) publications, this may
not be detected until both publications have reached a third node, in
which case one of the publications will be silently dropped on that
node. Hence, we end up with an inconsistent name table.
In most cases this conflict is just a temporary race, e.g., one
node is issuing a publication under the assumption that a previous,
conflicting, publication has already been withdrawn by the other node.
However, because of the (rtt related) distributed update delay, this
may not yet hold true on all nodes. The symptom of this failure is a
syslog message: "tipc: Cannot publish {%u,%u,%u}, overlap error".
In this commit we add a resiliency queue at the receiving end of
the name table distributor. When insertion of an arriving publication
fails, we retain it in this queue for a short amount of time, assuming
that another update will arrive very soon and clear the conflict. If so
happens, we insert the publication, otherwise we drop it.
The (configurable) retention value defaults to 2000 ms. Knowing from
experience that the situation described above is extremely rare, there
is no risk that the queue will accumulate any large number of items.
Signed-off-by: Erik Hugne <erik.hugne@ericsson.com>
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Acked-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC fixes from Olof Johansson:
"Here's the weekly batch of fixes from arm-soc.
The delta is a largeish negative delta, due to revert of SMP support
for Broadcom's STB SoC -- it was accidentally merged before some
issues had been addressed, so they will make a new attempt for 3.18.
I didn't see a need for a full revert of the whole platform due to
this, we're keeping the rest enabled.
The rest is mostly:
- a handful of DT fixes for i.MX (Hummingboard/Cubox-i in particular)
- some MTD/NAND fixes for OMAP
- minor DT fixes for shmobile
- warning fix for UP builds on vexpress/spc
There's also a couple of patches that wires up hwmod on TI's DRA7 SoC
so it can boot. Drivers and the rest had landed for 3.17, and it's
small and isolated so it made sense to pick up now even if it's not a
bugfix"
* tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (23 commits)
vexpress/spc: fix a build warning on array bounds
ARM: DRA7: hwmod: Add dra74x and dra72x specific ocp interface lists
ARM: DRA7: Add support for soc_is_dra74x() and soc_is_dra72x() variants
MAINTAINERS: catch special Rockchip code locations
ARM: dts: microsom-ar8035: MDIO pad must be set open drain
ARM: dts: omap54xx-clocks: Fix the l3 and l4 clock rates
ARM: brcmstb: revert SMP support
ARM: OMAP2+: hwmod: Rearm wake-up interrupts for DT when MUSB is idled
ARM: dts: Enable UART wake-up events for beagleboard
ARM: dts: Remove twl6030 clk32g "regulator"
ARM: OMAP2+: omap_device: remove warning that clk alias already exists
ARM: OMAP: fix %d confusingly prefixed with 0x in format string
ARM: dts: DRA7: fix interrupt-cells for GPIO
mtd: nand: omap: Fix 1-bit Hamming code scheme, omap_calculate_ecc()
ARM: dts: omap3430-sdp: Revert to using software ECC for NAND
ARM: OMAP2+: GPMC: Support Software ECC scheme via DT
mtd: nand: omap: Revert to using software ECC by default
ARM: dts: hummingboard/cubox-i: change SPDIF output to be more descriptive
ARM: dts: hummingboard/cubox-i: add USB OC pinctrl configuration
ARM: shmobile: r8a7791: add missing 0x0100 for SDCKCR
...
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