Removed obsolete resources from bonding.rst doc:
- bonding-devel@lists.sourceforge.net hasn't been used since 2008
- admin interface is 404
- Donald Becker's domain/content no longer online
Signed-off-by: Nivedita Singhvi <nivedita.singhvi@canonical.com>
Acked-by: Jay Vosburgh <jay.vosburgh@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Tony Nguyen says:
====================
Intel Wired LAN Driver Updates 2020-08-14
This series contains updates to i40e and igc drivers.
Vinicius fixes an issue with PTP spinlock being accessed before
initialization.
Przemyslaw fixes an issue with trusted VFs seeing additional traffic.
Grzegorz adds a wait for pending resets on driver removal to prevent
null pointer dereference.
v2: Fix function parameter for hw/aq in patch 2. Fix fixes tag in patch 3.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Trusted VF with unicast promiscuous mode set, could listen to TX
traffic of other VFs.
Set unicast promiscuous mode to RX traffic, if VSI has port VLAN
configured. Rename misleading I40E_AQC_SET_VSI_PROMISC_TX bit to
I40E_AQC_SET_VSI_PROMISC_RX_ONLY. Aligned unicast promiscuous with
VLAN to the one without VLAN.
Fixes: 6c41a76069 ("i40e: Add promiscuous on VLAN support")
Fixes: 3b1200891b ("i40e: When in promisc mode apply promisc mode to Tx Traffic as well")
Signed-off-by: Przemyslaw Patynowski <przemyslawx.patynowski@intel.com>
Signed-off-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>
Signed-off-by: Arkadiusz Kubalewski <arkadiusz.kubalewski@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Once we've copied data from the iterator we need to revert in case we
end up not sending any data.
This bug doesn't trigger with normal 'poll' based tests, because
we only feed a small chunk of data to kernel after poll indicated
POLLOUT. With blocking IO and large writes this triggers. Receiver
ends up with less data than it should get.
Fixes: 72511aab95 ("mptcp: avoid blocking in tcp_sendpages")
Signed-off-by: Florian Westphal <fw@strlen.de>
Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
On EF100, the RX hash field in the packet prefix may not be valid (e.g.
if the header parse failed), and this is indicated by a one-bit flag
elsewhere in the packet prefix. Only call skb_set_hash() if the
RSS_HASH_VALID bit is set.
Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Merge tag 'linux-can-fixes-for-5.9-20200814' of git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can
Marc Kleine-Budde says:
====================
pull-request: can 2020-08-14
this is a pull request of 6 patches for net/master. All patches fix problems in
the j1939 CAN networking stack.
The first patch is by Eric Dumazet fixes a kernel-infoleak in
j1939_sk_sock2sockaddr_can().
The remaining 5 patches are by Oleksij Rempel and fix recption of j1939
messages not orginated by the stack, a use-after-free in j1939_tp_txtimer(),
ensure that the CAN driver has a ml_priv allocated. These problem were found by
google's syzbot. Further ETP sessions with block size of less than 255 are
fixed and a sanity check was added to j1939_xtp_rx_dat_one() to detect packet
corruption.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
One fix for a boot crash on some platforms introduced by the recent pkey
refactoring.
Thanks to:
Christian Zigotzky, Aneesh Kumar K.V.
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Merge tag 'powerpc-5.9-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc fix from Michael Ellerman:
"One fix for a boot crash on some platforms introduced by the recent
pkey refactoring.
Thanks to Christian Zigotzky and Aneesh Kumar K.V"
* tag 'powerpc-5.9-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
powerpc/pkeys: Fix boot failures with Nemo board (A-EON AmigaOne X1000)
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Merge tag 'for-linus-5.9-rc1b-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip
Pull more xen updates from Juergen Gross:
- Remove support for running as 32-bit Xen PV-guest.
32-bit PV guests are rarely used, are lacking security fixes for
Meltdown, and can be easily replaced by PVH mode. Another series for
doing more cleanup will follow soon (removal of 32-bit-only pvops
functionality).
- Fixes and additional features for the Xen display frontend driver.
* tag 'for-linus-5.9-rc1b-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
drm/xen-front: Pass dumb buffer data offset to the backend
xen: Sync up with the canonical protocol definition in Xen
drm/xen-front: Add YUYV to supported formats
drm/xen-front: Fix misused IS_ERR_OR_NULL checks
xen/gntdev: Fix dmabuf import with non-zero sgt offset
x86/xen: drop tests for highmem in pv code
x86/xen: eliminate xen-asm_64.S
x86/xen: remove 32-bit Xen PV guest support
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Merge tag 'hyperv-fixes-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux
Pull hyper-v fixes from Wei Liu:
- fix oops reporting on Hyper-V
- make objtool happy
* tag 'hyperv-fixes-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux:
x86/hyperv: Make hv_setup_sched_clock inline
Drivers: hv: vmbus: Only notify Hyper-V for die events that are oops
syzbot found its way in 86_fsgsbase_read_task() and triggered this oops:
KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]
CPU: 0 PID: 6866 Comm: syz-executor262 Not tainted 5.8.0-syzkaller #0
RIP: 0010:x86_fsgsbase_read_task+0x16d/0x310 arch/x86/kernel/process_64.c:393
Call Trace:
putreg32+0x3ab/0x530 arch/x86/kernel/ptrace.c:876
genregs32_set arch/x86/kernel/ptrace.c:1026 [inline]
genregs32_set+0xa4/0x100 arch/x86/kernel/ptrace.c:1006
copy_regset_from_user include/linux/regset.h:326 [inline]
ia32_arch_ptrace arch/x86/kernel/ptrace.c:1061 [inline]
compat_arch_ptrace+0x36c/0xd90 arch/x86/kernel/ptrace.c:1198
__do_compat_sys_ptrace kernel/ptrace.c:1420 [inline]
__se_compat_sys_ptrace kernel/ptrace.c:1389 [inline]
__ia32_compat_sys_ptrace+0x220/0x2f0 kernel/ptrace.c:1389
do_syscall_32_irqs_on arch/x86/entry/common.c:84 [inline]
__do_fast_syscall_32+0x57/0x80 arch/x86/entry/common.c:126
do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:149
entry_SYSENTER_compat_after_hwframe+0x4d/0x5c
This can happen if ptrace() or sigreturn() pokes an LDT selector into FS
or GS for a task with no LDT and something tries to read the base before
a return to usermode notices the bad selector and fixes it.
The fix is to make sure ldt pointer is not NULL.
Fixes: 07e1d88ada ("x86/fsgsbase/64: Fix ptrace() to read the FS/GS base accurately")
Co-developed-by: Jann Horn <jannh@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Acked-by: Andy Lutomirski <luto@kernel.org>
Cc: Chang S. Bae <chang.seok.bae@intel.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Markus T Metzger <markus.t.metzger@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Shankar <ravi.v.shankar@intel.com>
Cc: Rik van Riel <riel@surriel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Pull crypto fix from Herbert Xu:
"This fixes a regression in af_alg"
* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
crypto: algif_aead - fix uninitialized ctx->init
Summary of modules changes for the 5.9 merge window:
- Have modules that use symbols from proprietary modules inherit the
TAINT_PROPRIETARY_MODULE taint, in an effort to prevent GPL shim modules that
are used to circumvent _GPL exports. These are modules that claim to be GPL
licensed while also using symbols from proprietary modules. Such modules will
be rejected while non-GPL modules will inherit the proprietary taint.
- Module export space cleanup. Unexport symbols that are unused outside of
module.c or otherwise used in only built-in code.
Signed-off-by: Jessica Yu <jeyu@kernel.org>
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Merge tag 'modules-for-v5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/jeyu/linux
Pull module updates from Jessica Yu:
"The most important change would be Christoph Hellwig's patch
implementing proprietary taint inheritance, in an effort to discourage
the creation of GPL "shim" modules that interface between GPL symbols
and proprietary symbols.
Summary:
- Have modules that use symbols from proprietary modules inherit the
TAINT_PROPRIETARY_MODULE taint, in an effort to prevent GPL shim
modules that are used to circumvent _GPL exports. These are modules
that claim to be GPL licensed while also using symbols from
proprietary modules. Such modules will be rejected while non-GPL
modules will inherit the proprietary taint.
- Module export space cleanup. Unexport symbols that are unused
outside of module.c or otherwise used in only built-in code"
* tag 'modules-for-v5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/jeyu/linux:
modules: inherit TAINT_PROPRIETARY_MODULE
modules: return licensing information from find_symbol
modules: rename the licence field in struct symsearch to license
modules: unexport __module_address
modules: unexport __module_text_address
modules: mark each_symbol_section static
modules: mark find_symbol static
modules: mark ref_module static
modules: linux/moduleparam.h: drop duplicated word in a comment
- remove '---help---' keyword support
- fix mouse events for 'menuconfig' symbols in search view of qconf
- code cleanups of qconf
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Merge tag 'kconfig-v5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
Pull Kconfig updates from Masahiro Yamada:
- remove '---help---' keyword support
- fix mouse events for 'menuconfig' symbols in search view of qconf
- code cleanups of qconf
* tag 'kconfig-v5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (24 commits)
kconfig: qconf: move setOptionMode() to ConfigList from ConfigView
kconfig: qconf: do not limit the pop-up menu to the first row
kconfig: qconf: refactor icon setups
kconfig: qconf: remove unused voidPix, menuInvPix
kconfig: qconf: remove ConfigItem::text/setText
kconfig: qconf: remove ConfigList::addColumn/removeColumn
kconfig: qconf: remove ConfigItem::pixmap/setPixmap
kconfig: qconf: drop more localization code
kconfig: qconf: remove 'parent' from ConfigList::updateMenuList()
kconfig: qconf: remove unused argument from ConfigView::updateList()
kconfig: qconf: remove unused argument from ConfigList::updateList()
kconfig: qconf: omit parent to QHBoxLayout()
kconfig: qconf: remove name from ConfigSearchWindow constructor
kconfig: qconf: remove unused ConfigList::listView()
kconfig: qconf: overload addToolBar() to create and insert toolbar
kconfig: qconf: remove toolBar from ConfigMainWindow members
kconfig: qconf: use 'menu' variable for (QMenu *)
kconfig: qconf: do not use 'menu' variable for (QMenuBar *)
kconfig: qconf: remove ->addSeparator() to menuBar
kconfig: add 'static' to some file-local data
...
Since the stack relays on receiving own packets, it was overwriting own
transmit buffer from received packets.
At least theoretically, the received echo buffer can be corrupt or
changed and the session partner can request to resend previous data. In
this case we will re-send bad data.
With this patch we will stop to overwrite own TX buffer and use it for
sanity checking.
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Link: https://lore.kernel.org/r/20200807105200.26441-6-o.rempel@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Sometimes it makes no sense to search the skb by pkt.dpo, since we need
next the skb within the transaction block. This may happen if we have an
ETP session with CTS set to less than 255 packets.
After this patch, we will be able to work with ETP sessions where the
block size (ETP.CM_CTS byte 2) is less than 255 packets.
Reported-by: Henrique Figueira <henrislip@gmail.com>
Reported-by: https://github.com/linux-can/can-utils/issues/228
Fixes: 9d71dd0c70 ("can: add support of SAE J1939 protocol")
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Link: https://lore.kernel.org/r/20200807105200.26441-5-o.rempel@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This patch adds check to ensure that the struct net_device::ml_priv is
allocated, as it is used later by the j1939 stack.
The allocation is done by all mainline CAN network drivers, but when using
bond or team devices this is not the case.
Bail out if no ml_priv is allocated.
Reported-by: syzbot+f03d384f3455d28833eb@syzkaller.appspotmail.com
Fixes: 9d71dd0c70 ("can: add support of SAE J1939 protocol")
Cc: linux-stable <stable@vger.kernel.org> # >= v5.4
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Link: https://lore.kernel.org/r/20200807105200.26441-4-o.rempel@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
The current stack implementation do not support ECTS requests of not
aligned TP sized blocks.
If ECTS will request a block with size and offset spanning two TP
blocks, this will cause memcpy() to read beyond the queued skb (which
does only contain one TP sized block).
Sometimes KASAN will detect this read if the memory region beyond the
skb was previously allocated and freed. In other situations it will stay
undetected. The ETP transfer in any case will be corrupted.
This patch adds a sanity check to avoid this kind of read and abort the
session with error J1939_XTP_ABORT_ECTS_TOO_BIG.
Reported-by: syzbot+5322482fe520b02aea30@syzkaller.appspotmail.com
Fixes: 9d71dd0c70 ("can: add support of SAE J1939 protocol")
Cc: linux-stable <stable@vger.kernel.org> # >= v5.4
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Link: https://lore.kernel.org/r/20200807105200.26441-3-o.rempel@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
In current J1939 stack implementation, we process all locally send
messages as own messages. Even if it was send by CAN_RAW socket.
To reproduce it use following commands:
testj1939 -P -r can0:0x80 &
cansend can0 18238040#0123
This step will trigger false positive not critical warning:
j1939_simple_recv: Received already invalidated message
With this patch we add additional check to make sure, related skb is own
echo message.
Fixes: 9d71dd0c70 ("can: add support of SAE J1939 protocol")
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Link: https://lore.kernel.org/r/20200807105200.26441-2-o.rempel@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
ConfigView::setOptionMode() only gets access to the 'list' member.
Move it to the more relevant ConfigList class.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
If you right-click the first row in the option tree, the pop-up menu
shows up, but if you right-click the second row or below, the event
is ignored due to the following check:
if (e->y() <= header()->geometry().bottom()) {
Perhaps, the intention was to show the pop-menu only when the tree
header was right-clicked, but this handler is not called in that case.
Since the origin of e->y() starts from the bottom of the header,
this check is odd.
Going forward, you can right-click anywhere in the tree to get the
pop-up menu.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
These icon data are used by ConfigItem, but stored in each instance
of ConfigView. There is no point to keep the same data in each of 3
instances, "menu", "config", and "search".
Move the icon data to the more relevant ConfigItem class, and make
them static members.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
This is a remnant of commit 694c49a7c0 ("kconfig: drop localization
support").
Get it back to the code prior to commit 3b9fa0931d ("[PATCH] Kconfig
i18n support").
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
All the call-sites of this function pass 'this' to the first argument.
So, 'parent' is always the 'this' pointer.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Now that ConfigList::updateList() takes no argument, the 'item' argument
ConfigView::updateList() is no longer used.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
This function allocates 'item' before using it, so the argument 'item'
is always shadowed.
Remove the meaningless argument.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
This constructor is only called with "search" as the second argument.
Hard-code the name in the constructor, and drop it from the function
argument.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Use the overloaded function, addToolBar(const QString &title)
to create a QToolBar object, setting its window title, and inserts
it into the toolbar area.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
The variable 'config' for the file menu is inconsistent.
You do not need to use different variables. Use 'menu' for every menu.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
I think it is a bit confusing to use 'menu' to hold a QMenuBar pointer.
I want to use 'menu' for a QMenu pointer.
You do not need to use a local variable here. Use menuBar() directly.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Fix some warnings from sparce like follows:
warning: symbol '...' was not declared. Should it be static?
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
On menu properties mouse events didn't do anything in search view
(listMode).
As there are no menus in listMode we can add an exception in tests to
always change the value on mouse events if we are in listMode.
Signed-off-by: Maxime Chretien <maxime.chretien@bootlin.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Pull networking fixes from David Miller:
"Some merge window fallout, some longer term fixes:
1) Handle headroom properly in lapbether and x25_asy drivers, from
Xie He.
2) Fetch MAC address from correct r8152 device node, from Thierry
Reding.
3) In the sw kTLS path we should allow MSG_CMSG_COMPAT in sendmsg,
from Rouven Czerwinski.
4) Correct fdputs in socket layer, from Miaohe Lin.
5) Revert troublesome sockptr_t optimization, from Christoph Hellwig.
6) Fix TCP TFO key reading on big endian, from Jason Baron.
7) Missing CAP_NET_RAW check in nfc, from Qingyu Li.
8) Fix inet fastreuse optimization with tproxy sockets, from Tim
Froidcoeur.
9) Fix 64-bit divide in new SFC driver, from Edward Cree.
10) Add a tracepoint for prandom_u32 so that we can more easily
perform usage analysis. From Eric Dumazet.
11) Fix rwlock imbalance in AF_PACKET, from John Ogness"
* git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (49 commits)
net: openvswitch: introduce common code for flushing flows
af_packet: TPACKET_V3: fix fill status rwlock imbalance
random32: add a tracepoint for prandom_u32()
Revert "ipv4: tunnel: fix compilation on ARCH=um"
net: accept an empty mask in /sys/class/net/*/queues/rx-*/rps_cpus
net: ethernet: stmmac: Disable hardware multicast filter
net: stmmac: dwmac1000: provide multicast filter fallback
ipv4: tunnel: fix compilation on ARCH=um
vsock: fix potential null pointer dereference in vsock_poll()
sfc: fix ef100 design-param checking
net: initialize fastreuse on inet_inherit_port
net: refactor bind_bucket fastreuse into helper
net: phy: marvell10g: fix null pointer dereference
net: Fix potential memory leak in proto_register()
net: qcom/emac: add missed clk_disable_unprepare in error path of emac_clks_phase1_init
ionic_lif: Use devm_kcalloc() in ionic_qcq_alloc()
net/nfc/rawsock.c: add CAP_NET_RAW check.
hinic: fix strncpy output truncated compile warnings
drivers/net/wan/x25_asy: Added needed_headroom and a skb->len check
net/tls: Fix kmap usage
...
Pull i2c updates from Wolfram Sang:
- bus recovery can now be given a pinctrl handle and the I2C core will
do all the steps to switch to/from GPIO which can save quite some
boilerplate code from drivers
- "fallthrough" conversion
- driver updates, mostly ID additions
* 'i2c/for-5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: (32 commits)
i2c: iproc: fix race between client unreg and isr
i2c: eg20t: use generic power management
i2c: eg20t: Drop PCI wakeup calls from .suspend/.resume
i2c: mediatek: Fix i2c_spec_values description
i2c: mediatek: Add i2c compatible for MediaTek MT8192
dt-bindings: i2c: update bindings for MT8192 SoC
i2c: mediatek: Add access to more than 8GB dram in i2c driver
i2c: mediatek: Add apdma sync in i2c driver
i2c: i801: Add support for Intel Tiger Lake PCH-H
i2c: i801: Add support for Intel Emmitsburg PCH
i2c: bcm2835: Replace HTTP links with HTTPS ones
Documentation: i2c: dev: 'block process call' is supported
i2c: at91: Move to generic GPIO bus recovery
i2c: core: treat EPROBE_DEFER when acquiring SCL/SDA GPIOs
i2c: core: add generic I2C GPIO recovery
dt-bindings: i2c: add generic properties for GPIO bus recovery
i2c: rcar: avoid race when unregistering slave
i2c: tegra: Avoid tegra_i2c_init_dma() for Tegra210 vi i2c
i2c: tegra: Fix runtime resume to re-init VI I2C
i2c: tegra: Fix the error path in tegra_i2c_runtime_resume
...
To avoid some issues, for example RCU usage warning and double free,
we should flush the flows under ovs_lock. This patch refactors
table_instance_destroy and introduces table_instance_flow_flush
which can be invoked by __dp_destroy or ovs_flow_tbl_flush.
Fixes: 50b0e61b32 ("net: openvswitch: fix possible memleak on destroy flow-table")
Reported-by: Johan Knöös <jknoos@google.com>
Reported-at: https://mail.openvswitch.org/pipermail/ovs-discuss/2020-August/050489.html
Signed-off-by: Tonghao Zhang <xiangxia.m.yue@gmail.com>
Reviewed-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
After @blk_fill_in_prog_lock is acquired there is an early out vnet
situation that can occur. In that case, the rwlock needs to be
released.
Also, since @blk_fill_in_prog_lock is only acquired when @tp_version
is exactly TPACKET_V3, only release it on that exact condition as
well.
And finally, add sparse annotation so that it is clearer that
prb_fill_curr_block() and prb_clear_blk_fill_status() are acquiring
and releasing @blk_fill_in_prog_lock, respectively. sparse is still
unable to understand the balance, but the warnings are now on a
higher level that make more sense.
Fixes: 632ca50f2c ("af_packet: TPACKET_V3: replace busy-wait loop")
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
There has been some heat around prandom_u32() lately, and some people
were wondering if there was a simple way to determine how often
it was used, before considering making it maybe 10 times more expensive.
This tracepoint exports the generated pseudo random value.
Tested:
perf list | grep prandom_u32
random:prandom_u32 [Tracepoint event]
perf record -a [-g] [-C1] -e random:prandom_u32 sleep 1
[ perf record: Woken up 0 times to write data ]
[ perf record: Captured and wrote 259.748 MB perf.data (924087 samples) ]
perf report --nochildren
...
97.67% ksoftirqd/1 [kernel.vmlinux] [k] prandom_u32
|
---prandom_u32
prandom_u32
|
|--48.86%--tcp_v4_syn_recv_sock
| tcp_check_req
| tcp_v4_rcv
| ...
--48.81%--tcp_conn_request
tcp_v4_conn_request
tcp_rcv_state_process
...
perf script
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Willy Tarreau <w@1wt.eu>
Cc: Sedat Dilek <sedat.dilek@gmail.com>
Tested-by: Sedat Dilek <sedat.dilek@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
