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irq_set_affinity_hint() is deprecated. Use irq_update_affinity_hint()
instead. This removes the side-effect of actually applying the affinity.
The driver does not really need to worry about spreading its IRQs across
CPUs. The core code already takes care of that.
On the contrary, when the driver applies affinities by itself, it breaks
the users' expectations:
1. The user configures irqbalance with IRQBALANCE_BANNED_CPULIST in
order to prevent IRQs from being moved to certain CPUs that run a
real-time workload.
2. ice reconfigures VSIs at runtime due to a MIB change
(ice_dcb_process_lldp_set_mib_change). Reopening a VSI resets the
affinity in ice_vsi_req_irq_msix().
3. ice has no idea about irqbalance's config, so it may move an IRQ to
a banned CPU. The real-time workload suffers unacceptable latency.
I am not sure if updating the affinity hints is at all useful, because
irqbalance ignores them since 2016 ([1]), but at least it's harmless.
This ice change is similar to i40e commit d34c54d1739c ("i40e: Use
irq_update_affinity_hint()").
[1] https://github.com/Irqbalance/irqbalance/commit/dcc411e7bfdd
Signed-off-by: Michal Schmidt <mschmidt@redhat.com>
Reviewed-by: Sunil Goutham <sgoutham@marvell.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Pucha Himasekhar Reddy <himasekharx.reddy.pucha@intel.com>
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Link: https://lore.kernel.org/r/20240607-next-2024-06-03-intel-next-batch-v3-3-d1470cee3347@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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In ice_ptp_cfg_clkout(), the ice driver needs to calculate the nearest next
second of a current time value specified in nanoseconds. It implements this
using div64_u64, because the time value is a u64. It could use div_u64
since NSEC_PER_SEC is smaller than 32-bits.
Ideally this would be implemented directly with roundup(), but that can't
work on all platforms due to a division which requires using the specific
macros and functions due to platform restrictions, and to ensure that the
most appropriate and fast instructions are used.
The kernel doesn't currently provide any 64-bit equivalents for doing
roundup. Attempting to use roundup() on a 32-bit platform will result in a
link failure due to not having a direct 64-bit division.
The closest equivalent for this is DIV64_U64_ROUND_UP, which does a
division always rounding up. However, this only computes the division, and
forces use of the div64_u64 in cases where the divisor is a 32bit value and
could make use of div_u64.
Introduce DIV_U64_ROUND_UP based on div_u64, and then use it to implement
roundup_u64 which takes a u64 input value and a u32 rounding value.
The name roundup_u64 matches the naming scheme of div_u64, and future
patches could implement roundup64_u64 if they need to round by a multiple
that is greater than 32-bits.
Replace the logic in ice_ptp.c which does this equivalent with the newly
added roundup_u64.
Tested-by: Pucha Himasekhar Reddy <himasekharx.reddy.pucha@intel.com>
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Link: https://lore.kernel.org/r/20240607-next-2024-06-03-intel-next-batch-v3-2-d1470cee3347@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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*-objs suffix is reserved rather for (user-space) host programs while
usually *-y suffix is used for kernel drivers (although *-objs works
for that purpose for now).
Let's correct the old usages of *-objs in Makefiles.
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>
Reviewed-by: Alexander Lobakin <aleksander.lobakin@intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Pucha Himasekhar Reddy <himasekharx.reddy.pucha@intel.com>
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Link: https://lore.kernel.org/r/20240607-next-2024-06-03-intel-next-batch-v3-1-d1470cee3347@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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make allmodconfig && make W=1 C=1 reports:
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/isdn/hardware/mISDN/hfcpci.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/isdn/hardware/mISDN/hfcmulti.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/isdn/hardware/mISDN/hfcsusb.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/isdn/hardware/mISDN/avmfritz.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/isdn/hardware/mISDN/speedfax.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/isdn/hardware/mISDN/mISDNinfineon.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/isdn/hardware/mISDN/w6692.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/isdn/hardware/mISDN/netjet.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/isdn/hardware/mISDN/mISDNipac.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/isdn/hardware/mISDN/mISDNisar.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/isdn/mISDN/mISDN_core.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/isdn/mISDN/mISDN_dsp.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/isdn/mISDN/l1oip.o
Add the missing invocations of the MODULE_DESCRIPTION() macro.
Signed-off-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Link: https://lore.kernel.org/r/20240607-md-drivers-isdn-v1-1-81fb7001bc3a@quicinc.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next
Daniel Borkmann says:
====================
pull-request: bpf-next 2024-06-06
We've added 54 non-merge commits during the last 10 day(s) which contain
a total of 50 files changed, 1887 insertions(+), 527 deletions(-).
The main changes are:
1) Add a user space notification mechanism via epoll when a struct_ops
object is getting detached/unregistered, from Kui-Feng Lee.
2) Big batch of BPF selftest refactoring for sockmap and BPF congctl
tests, from Geliang Tang.
3) Add BTF field (type and string fields, right now) iterator support
to libbpf instead of using existing callback-based approaches,
from Andrii Nakryiko.
4) Extend BPF selftests for the latter with a new btf_field_iter
selftest, from Alan Maguire.
5) Add new kfuncs for a generic, open-coded bits iterator,
from Yafang Shao.
6) Fix BPF selftests' kallsyms_find() helper under kernels configured
with CONFIG_LTO_CLANG_THIN, from Yonghong Song.
7) Remove a bunch of unused structs in BPF selftests,
from David Alan Gilbert.
8) Convert test_sockmap section names into names understood by libbpf
so it can deduce program type and attach type, from Jakub Sitnicki.
9) Extend libbpf with the ability to configure log verbosity
via LIBBPF_LOG_LEVEL environment variable, from Mykyta Yatsenko.
10) Fix BPF selftests with regards to bpf_cookie and find_vma flakiness
in nested VMs, from Song Liu.
11) Extend riscv32/64 JITs to introduce shift/add helpers to generate Zba
optimization, from Xiao Wang.
12) Enable BPF programs to declare arrays and struct fields with kptr,
bpf_rb_root, and bpf_list_head, from Kui-Feng Lee.
* tag 'for-netdev' of https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next: (54 commits)
selftests/bpf: Drop useless arguments of do_test in bpf_tcp_ca
selftests/bpf: Use start_test in test_dctcp in bpf_tcp_ca
selftests/bpf: Use start_test in test_dctcp_fallback in bpf_tcp_ca
selftests/bpf: Add start_test helper in bpf_tcp_ca
selftests/bpf: Use connect_to_fd_opts in do_test in bpf_tcp_ca
libbpf: Auto-attach struct_ops BPF maps in BPF skeleton
selftests/bpf: Add btf_field_iter selftests
selftests/bpf: Fix send_signal test with nested CONFIG_PARAVIRT
libbpf: Remove callback-based type/string BTF field visitor helpers
bpftool: Use BTF field iterator in btfgen
libbpf: Make use of BTF field iterator in BTF handling code
libbpf: Make use of BTF field iterator in BPF linker code
libbpf: Add BTF field iterator
selftests/bpf: Ignore .llvm.<hash> suffix in kallsyms_find()
selftests/bpf: Fix bpf_cookie and find_vma in nested VM
selftests/bpf: Test global bpf_list_head arrays.
selftests/bpf: Test global bpf_rb_root arrays and fields in nested struct types.
selftests/bpf: Test kptr arrays and kptrs in nested struct fields.
bpf: limit the number of levels of a nested struct type.
bpf: look into the types of the fields of a struct type recursively.
...
====================
Link: https://lore.kernel.org/r/20240606223146.23020-1-daniel@iogearbox.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/wireless/wireless-next
Kalle Valo says:
====================
wireless-next patches for v6.11
The first "new features" pull request for v6.11 with changes both in
stack and in drivers. Nothing out of ordinary, except that we have
two conflicts this time:
net/mac80211/cfg.c
https://lore.kernel.org/all/20240531124415.05b25e7a@canb.auug.org.au
drivers/net/wireless/microchip/wilc1000/netdev.c
https://lore.kernel.org/all/20240603110023.23572803@canb.auug.org.au
Major changes:
cfg80211/mac80211
* parse Transmit Power Envelope (TPE) data in mac80211 instead of in drivers
wilc1000
* read MAC address during probe to make it visible to user space
iwlwifi
* bump FW API to 91 for BZ/SC devices
* report 64-bit radiotap timestamp
* enable P2P low latency by default
* handle Transmit Power Envelope (TPE) advertised by AP
* start using guard()
rtlwifi
* RTL8192DU support
ath12k
* remove unsupported tx monitor handling
* channel 2 in 6 GHz band support
* Spatial Multiplexing Power Save (SMPS) in 6 GHz band support
* multiple BSSID (MBSSID) and Enhanced Multi-BSSID Advertisements (EMA)
support
* dynamic VLAN support
* add panic handler for resetting the firmware state
ath10k
* add qcom,no-msa-ready-indicator Device Tree property
* LED support for various chipsets
* tag 'wireless-next-2024-06-07' of git://git.kernel.org/pub/scm/linux/kernel/git/wireless/wireless-next: (194 commits)
wifi: ath12k: add hw_link_id in ath12k_pdev
wifi: ath12k: add panic handler
wifi: rtw89: chan: Use swap() in rtw89_swap_sub_entity()
wifi: brcm80211: remove unused structs
wifi: brcm80211: use sizeof(*pointer) instead of sizeof(type)
wifi: ath12k: do not process consecutive RDDM event
dt-bindings: net: wireless: ath11k: Drop "qcom,ipq8074-wcss-pil" from example
wifi: ath12k: fix memory leak in ath12k_dp_rx_peer_frag_setup()
wifi: rtlwifi: handle return value of usb init TX/RX
wifi: rtlwifi: Enable the new rtl8192du driver
wifi: rtlwifi: Add rtl8192du/sw.c
wifi: rtlwifi: Constify rtl_hal_cfg.{ops,usb_interface_cfg} and rtl_priv.cfg
wifi: rtlwifi: Add rtl8192du/dm.{c,h}
wifi: rtlwifi: Add rtl8192du/fw.{c,h} and rtl8192du/led.{c,h}
wifi: rtlwifi: Add rtl8192du/rf.{c,h}
wifi: rtlwifi: Add rtl8192du/trx.{c,h}
wifi: rtlwifi: Add rtl8192du/phy.{c,h}
wifi: rtlwifi: Add rtl8192du/hw.{c,h}
wifi: rtlwifi: Add new members to struct rtl_priv for RTL8192DU
wifi: rtlwifi: Add rtl8192du/table.{c,h}
...
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
====================
Link: https://lore.kernel.org/r/20240607093517.41394C2BBFC@smtp.kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Marek Behún says:
====================
Fix changing DSA conduit
This series fixes an issue in the DSA code related to host interface UC
address installed into port FDB and port conduit address database when
live-changing port conduit.
The first patch refactores/deduplicates the installation/uninstallation
of the interface's MAC address and the second patch fixes the issue.
Cover letter for v1 and v2:
https://patchwork.kernel.org/project/netdevbpf/cover/20240429163627.16031-1-kabel@kernel.org/
https://patchwork.kernel.org/project/netdevbpf/cover/20240502122922.28139-1-kabel@kernel.org/
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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When changing DSA user interface conduit while the user interface is up,
DSA exhibits different behavior in comparison to when the interface is
down. This different behavior concerns the primary unicast MAC address
stored in the port standalone FDB and in the conduit device UC database.
If we put a switch port down while changing the conduit with
ip link set sw0p0 down
ip link set sw0p0 type dsa conduit conduit1
ip link set sw0p0 up
we delete the address in dsa_user_close() and install the (possibly
different) address in dsa_user_open().
But when changing the conduit on the fly, the old address is not
deleted and the new one is not installed.
Since we explicitly want to support live-changing the conduit, uninstall
the old address before calling dsa_port_assign_conduit() and install the
(possibly different) new address after the call.
Because conduit change might also trigger address change (the user
interface is supposed to inherit the conduit interface MAC address if no
address is defined in hardware (dp->mac is a zero address)), move the
eth_hw_addr_inherit() call from dsa_user_change_conduit() to
dsa_port_change_conduit(), just before installing the new address.
Although this is in theory a flaw in DSA core, it needs not be
backported, since there is currently no DSA driver that can be affected
by this. The only DSA driver that supports changing conduit is felix,
and, as explained by Vladimir Oltean [1]:
There are 2 reasons why with felix the bug does not manifest itself.
First is because both the 'ocelot' and the alternate 'ocelot-8021q'
tagging protocols have the 'promisc_on_conduit = true' flag. So the
unicast address doesn't have to be in the conduit's RX filter -
neither the old or the new conduit.
Second, dsa_user_host_uc_install() theoretically leaves behind host
FDB entries installed towards the wrong (old) CPU port. But in
felix_fdb_add(), we treat any FDB entry requested towards any CPU port
as if it was a multicast FDB entry programmed towards _all_ CPU ports.
For that reason, it is installed towards the port mask of the PGID_CPU
port group ID:
if (dsa_port_is_cpu(dp))
port = PGID_CPU;
Therefore no Fixes tag for this change.
[1] https://lore.kernel.org/netdev/20240507201827.47suw4fwcjrbungy@skbuf/
Signed-off-by: Marek Behún <kabel@kernel.org>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Tested-by: Vladimir Oltean <olteanv@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The sequence
if (dsa_switch_supports_uc_filtering(ds))
dsa_port_standalone_host_fdb_add(dp, addr, 0);
if (!ether_addr_equal(addr, conduit->dev_addr))
dev_uc_add(conduit, addr);
is executed both in dsa_user_open() and dsa_user_set_mac_addr().
Its reverse is executed both in dsa_user_close() and
dsa_user_set_mac_addr().
Refactor these sequences into new functions dsa_user_host_uc_install()
and dsa_user_host_uc_uninstall().
Signed-off-by: Marek Behún <kabel@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Jakub Kicinski says:
====================
rtnetlink: move rtnl_lock handling out of af_netlink
With the changes done in commit 5b4b62a169e1 ("rtnetlink: make
the "split" NLM_DONE handling generic") we can also move the
rtnl locking out of af_netlink.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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Back in 2007, in commit af65bdfce98d ("[NETLINK]: Switch cb_lock spinlock
to mutex and allow to override it") netlink core was extended to allow
subsystems to replace the dump mutex lock with its own lock.
The mechanism was used by rtnetlink to take rtnl_lock but it isn't
sufficiently flexible for other users. Over the 17 years since
it was added no other user appeared. Since rtnetlink needs conditional
locking now, and doesn't use it either, axe this feature complete.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Now that we have an intermediate layer of code for handling
rtnl-level netlink dump quirks, we can move the rtnl_lock
taking there.
For dump handlers with RTNL_FLAG_DUMP_SPLIT_NLM_DONE we can
avoid taking rtnl_lock just to generate NLM_DONE, once again.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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kernel.h is included solely for some other existing headers.
Include them directly and get rid of kernel.h.
While at it, sort headers alphabetically for easier maintenance.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Kurt Kanzenbach <kurt@linutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Florian Westphal says:
====================
net: tcp: un-pin tw timer
Changes since previous iteration:
- Patch 1: update a comment, I copied Erics v7 RvB tag.
- Patch 2: move bh off/on into hashdance_schedule and get rid of
comment mentioning pinned tw timer.
I did not copy Erics RvB tag over from v7 because of the change.
- Patch 3 is unchanged, so I kept Erics RvB tag.
This is v8 of the series where the tw_timer is un-pinned to get rid of
interferences in isolated CPUs setups.
First patch makes necessary preparations, existing code relies on
TIMER_PINNED to avoid races.
Second patch un-pins the TW timer. Could be folded into the first one,
but it might help wrt. bisection.
Third patch is a minor cleanup to move a helper from .h to the only
remaining compilation unit.
Tested with iperf3 and stress-ng socket mode.
====================
Reviewed-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Its no longer used outside inet_timewait_sock.c, so move it there.
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
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After previous patch, even if timer fires immediately on another CPU,
context that schedules the timer now holds the ehash spinlock, so timer
cannot reap tw socket until ehash lock is released.
BH disable is moved into hashdance_schedule.
Signed-off-by: Florian Westphal <fw@strlen.de>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The TCP timewait timer is proving to be problematic for setups where
scheduler CPU isolation is achieved at runtime via cpusets (as opposed to
statically via isolcpus=domains).
What happens there is a CPU goes through tcp_time_wait(), arming the
time_wait timer, then gets isolated. TCP_TIMEWAIT_LEN later, the timer
fires, causing interference for the now-isolated CPU. This is conceptually
similar to the issue described in commit e02b93124855 ("workqueue: Unbind
kworkers before sending them to exit()")
Move inet_twsk_schedule() to within inet_twsk_hashdance(), with the ehash
lock held. Expand the lock's critical section from inet_twsk_kill() to
inet_twsk_deschedule_put(), serializing the scheduling vs descheduling of
the timer. IOW, this prevents the following race:
tcp_time_wait()
inet_twsk_hashdance()
inet_twsk_deschedule_put()
del_timer_sync()
inet_twsk_schedule()
Thanks to Paolo Abeni for suggesting to leverage the ehash lock.
This also restores a comment from commit ec94c2696f0b ("tcp/dccp: avoid
one atomic operation for timewait hashdance") as inet_twsk_hashdance() had
a "Step 1" and "Step 3" comment, but the "Step 2" had gone missing.
inet_twsk_deschedule_put() now acquires the ehash spinlock to synchronize
with inet_twsk_hashdance_schedule().
To ease possible regression search, actual un-pin is done in next patch.
Link: https://lore.kernel.org/all/ZPhpfMjSiHVjQkTk@localhost.localdomain/
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Valentin Schneider <vschneid@redhat.com>
Co-developed-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Petr Machata says:
====================
mlxsw: ACL fixes
Ido Schimmel writes:
Patches #1-#3 fix various spelling mistakes I noticed while working on
the code base.
Patch #4 fixes a general protection fault by bailing out when the error
occurs and warning.
Patch #5 fixes the warning.
Patch #6 fixes ACL scale regression and firmware errors.
See the commit messages for more info.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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ACLs that reside in the algorithmic TCAM (A-TCAM) in Spectrum-2 and
newer ASICs can share the same mask if their masks only differ in up to
8 consecutive bits. For example, consider the following filters:
# tc filter add dev swp1 ingress pref 1 proto ip flower dst_ip 192.0.2.0/24 action drop
# tc filter add dev swp1 ingress pref 1 proto ip flower dst_ip 198.51.100.128/25 action drop
The second filter can use the same mask as the first (dst_ip/24) with a
delta of 1 bit.
However, the above only works because the two filters have different
values in the common unmasked part (dst_ip/24). When entries have the
same value in the common unmasked part they create undesired collisions
in the device since many entries now have the same key. This leads to
firmware errors such as [1] and to a reduced scale.
Fix by adjusting the hash table key to only include the value in the
common unmasked part. That is, without including the delta bits. That
way the driver will detect the collision during filter insertion and
spill the filter into the circuit TCAM (C-TCAM).
Add a test case that fails without the fix and adjust existing cases
that check C-TCAM spillage according to the above limitation.
[1]
mlxsw_spectrum2 0000:06:00.0: EMAD reg access failed (tid=3379b18a00003394,reg_id=3027(ptce3),type=write,status=8(resource not available))
Fixes: c22291f7cf45 ("mlxsw: spectrum: acl: Implement delta for ERP")
Reported-by: Alexander Zubkov <green@qrator.net>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Amit Cohen <amcohen@nvidia.com>
Tested-by: Alexander Zubkov <green@qrator.net>
Signed-off-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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ACLs in Spectrum-2 and newer ASICs can reside in the algorithmic TCAM
(A-TCAM) or in the ordinary circuit TCAM (C-TCAM). The former can
contain more ACLs (i.e., tc filters), but the number of masks in each
region (i.e., tc chain) is limited.
In order to mitigate the effects of the above limitation, the device
allows filters to share a single mask if their masks only differ in up
to 8 consecutive bits. For example, dst_ip/25 can be represented using
dst_ip/24 with a delta of 1 bit. The C-TCAM does not have a limit on the
number of masks being used (and therefore does not support mask
aggregation), but can contain a limited number of filters.
The driver uses the "objagg" library to perform the mask aggregation by
passing it objects that consist of the filter's mask and whether the
filter is to be inserted into the A-TCAM or the C-TCAM since filters in
different TCAMs cannot share a mask.
The set of created objects is dependent on the insertion order of the
filters and is not necessarily optimal. Therefore, the driver will
periodically ask the library to compute a more optimal set ("hints") by
looking at all the existing objects.
When the library asks the driver whether two objects can be aggregated
the driver only compares the provided masks and ignores the A-TCAM /
C-TCAM indication. This is the right thing to do since the goal is to
move as many filters as possible to the A-TCAM. The driver also forbids
two identical masks from being aggregated since this can only happen if
one was intentionally put in the C-TCAM to avoid a conflict in the
A-TCAM.
The above can result in the following set of hints:
H1: {mask X, A-TCAM} -> H2: {mask Y, A-TCAM} // X is Y + delta
H3: {mask Y, C-TCAM} -> H4: {mask Z, A-TCAM} // Y is Z + delta
After getting the hints from the library the driver will start migrating
filters from one region to another while consulting the computed hints
and instructing the device to perform a lookup in both regions during
the transition.
Assuming a filter with mask X is being migrated into the A-TCAM in the
new region, the hints lookup will return H1. Since H2 is the parent of
H1, the library will try to find the object associated with it and
create it if necessary in which case another hints lookup (recursive)
will be performed. This hints lookup for {mask Y, A-TCAM} will either
return H2 or H3 since the driver passes the library an object comparison
function that ignores the A-TCAM / C-TCAM indication.
This can eventually lead to nested objects which are not supported by
the library [1].
Fix by removing the object comparison function from both the driver and
the library as the driver was the only user. That way the lookup will
only return exact matches.
I do not have a reliable reproducer that can reproduce the issue in a
timely manner, but before the fix the issue would reproduce in several
minutes and with the fix it does not reproduce in over an hour.
Note that the current usefulness of the hints is limited because they
include the C-TCAM indication and represent aggregation that cannot
actually happen. This will be addressed in net-next.
[1]
WARNING: CPU: 0 PID: 153 at lib/objagg.c:170 objagg_obj_parent_assign+0xb5/0xd0
Modules linked in:
CPU: 0 PID: 153 Comm: kworker/0:18 Not tainted 6.9.0-rc6-custom-g70fbc2c1c38b #42
Hardware name: Mellanox Technologies Ltd. MSN3700C/VMOD0008, BIOS 5.11 10/10/2018
Workqueue: mlxsw_core mlxsw_sp_acl_tcam_vregion_rehash_work
RIP: 0010:objagg_obj_parent_assign+0xb5/0xd0
[...]
Call Trace:
<TASK>
__objagg_obj_get+0x2bb/0x580
objagg_obj_get+0xe/0x80
mlxsw_sp_acl_erp_mask_get+0xb5/0xf0
mlxsw_sp_acl_atcam_entry_add+0xe8/0x3c0
mlxsw_sp_acl_tcam_entry_create+0x5e/0xa0
mlxsw_sp_acl_tcam_vchunk_migrate_one+0x16b/0x270
mlxsw_sp_acl_tcam_vregion_rehash_work+0xbe/0x510
process_one_work+0x151/0x370
Fixes: 9069a3817d82 ("lib: objagg: implement optimization hints assembly and use hints for object creation")
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Amit Cohen <amcohen@nvidia.com>
Tested-by: Alexander Zubkov <green@qrator.net>
Signed-off-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
The library supports aggregation of objects into other objects only if
the parent object does not have a parent itself. That is, nesting is not
supported.
Aggregation happens in two cases: Without and with hints, where hints
are a pre-computed recommendation on how to aggregate the provided
objects.
Nesting is not possible in the first case due to a check that prevents
it, but in the second case there is no check because the assumption is
that nesting cannot happen when creating objects based on hints. The
violation of this assumption leads to various warnings and eventually to
a general protection fault [1].
Before fixing the root cause, error out when nesting happens and warn.
[1]
general protection fault, probably for non-canonical address 0xdead000000000d90: 0000 [#1] PREEMPT SMP PTI
CPU: 1 PID: 1083 Comm: kworker/1:9 Tainted: G W 6.9.0-rc6-custom-gd9b4f1cca7fb #7
Hardware name: Mellanox Technologies Ltd. MSN3700/VMOD0005, BIOS 5.11 01/06/2019
Workqueue: mlxsw_core mlxsw_sp_acl_tcam_vregion_rehash_work
RIP: 0010:mlxsw_sp_acl_erp_bf_insert+0x25/0x80
[...]
Call Trace:
<TASK>
mlxsw_sp_acl_atcam_entry_add+0x256/0x3c0
mlxsw_sp_acl_tcam_entry_create+0x5e/0xa0
mlxsw_sp_acl_tcam_vchunk_migrate_one+0x16b/0x270
mlxsw_sp_acl_tcam_vregion_rehash_work+0xbe/0x510
process_one_work+0x151/0x370
worker_thread+0x2cb/0x3e0
kthread+0xd0/0x100
ret_from_fork+0x34/0x50
ret_from_fork_asm+0x1a/0x30
</TASK>
Fixes: 9069a3817d82 ("lib: objagg: implement optimization hints assembly and use hints for object creation")
Reported-by: Alexander Zubkov <green@qrator.net>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Amit Cohen <amcohen@nvidia.com>
Tested-by: Alexander Zubkov <green@qrator.net>
Signed-off-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
The key is encoded, not encrypted.
Fixes: c22291f7cf45 ("mlxsw: spectrum: acl: Implement delta for ERP")
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Amit Cohen <amcohen@nvidia.com>
Tested-by: Alexander Zubkov <green@qrator.net>
Signed-off-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Fixes: 0a020d416d0a ("lib: introduce initial implementation of object aggregation manager")
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Amit Cohen <amcohen@nvidia.com>
Tested-by: Alexander Zubkov <green@qrator.net>
Signed-off-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Fixes: 0a020d416d0a ("lib: introduce initial implementation of object aggregation manager")
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Amit Cohen <amcohen@nvidia.com>
Tested-by: Alexander Zubkov <green@qrator.net>
Signed-off-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Currently the k3_udma_glue_rx_get_irq() function returns either negative
error codes or zero on error. Generally, in the kernel, zero means
success so this be confusing and has caused bugs in the past. Also the
"tx" version of this function only returns negative error codes. Let's
clean this "rx" function so both functions match.
This patch has no effect on runtime.
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Acked-by: Peter Ujfalusi <peter.ujfalusi@gmail.com>
Acked-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Dan, who's working on C++ YNL, pointed out that the C code
does not make policies const. Sprinkle some 'const's around.
Reported-by: Dan Melnic <dmm@meta.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Donald Hunter <donald.hunter@gmail.com>
Reviewed-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Having an OR in WARN_ON() makes me sad because it's impossible to tell
which condition is true when triggered.
Split a WARN_ON() with an OR in page_pool_disable_direct_recycling().
Signed-off-by: David Wei <dw@davidwei.uk>
Reviewed-by: Mina Almasry <almasrymina@google.com>
Reviewed-by: Somnath Kotur <somnath.kotur@broadcom.com>
Acked-by: Jesper Dangaard Brouer <hawk@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Add multicast filtering support for ICSSG Driver. Multicast addresses will
be updated by __dev_mc_sync() API. icssg_prueth_add_macst () and
icssg_prueth_del_mcast() will be sync and unsync APIs for the driver
respectively.
To add a mac_address for a port, driver needs to call icssg_fdb_add_del()
and pass the mac_address and BIT(port_id) to the API. The ICSSG firmware
will then configure the rules and allow filtering.
If a mac_address is added to port0 and the same mac_address needs to be
added for port1, driver needs to pass BIT(port0) | BIT(port1) to the
icssg_fdb_add_del() API. If driver just pass BIT(port1) then the entry for
port0 will be overwritten / lost. This is a design constraint on the
firmware side.
To overcome this in the driver, to add any mac_address for let's say portX
driver first checks if the same mac_address is already added for any other
port. If yes driver calls icssg_fdb_add_del() with BIT(portX) |
BIT(other_existing_port). If not, driver calls icssg_fdb_add_del() with
BIT(portX).
The same thing is applicable for deleting mac_addresses as well. This
logic is in icssg_prueth_add_mcast / icssg_prueth_del_mcast APIs.
Signed-off-by: MD Danish Anwar <danishanwar@ti.com>
Reviewed-by: Wojciech Drewek <wojciech.drewek@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Some docks support MAC pass-through - MAC address
is taken from another device.
Driver should indicate that with NET_ADDR_STOLEN flag.
This should help to avoid collisions if network interface
names are generated with MAC policy.
Reported and discussed here
https://github.com/systemd/systemd/issues/33104
Signed-off-by: Milan Broz <gmazyland@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/20240605153340.25694-1-gmazyland@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
|
|
bpf_map_lookup_elem() has been removed from do_test(), it makes the
sk_stg_map argument of do_test() useless. In addition, two exactly the
same opts are passed in all the places where do_test() is invoked, so
cli_opts argument can be dropped too.
This patch drops these two useless arguments of do_test() in bpf_tcp_ca.c.
Signed-off-by: Geliang Tang <tanggeliang@kylinos.cn>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/7056eab111d78a05bce29d2821228dc93f240de4.1717054461.git.tanggeliang@kylinos.cn
|
|
The "if (sk_stg_map)" block in do_test() is only used by test_dctcp(),
it makes sense to move it from do_test() into test_dctcp(). Then
do_test() can be used by other tests except test_dctcp().
Signed-off-by: Geliang Tang <tanggeliang@kylinos.cn>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/9938916627b9810c877e5c03a621bc0ba5acf5c5.1717054461.git.tanggeliang@kylinos.cn
|
|
The newly added helper start_test() can be used in test_dctcp_fallback()
too, to replace start_server_str() and connect_to_fd_opts(). In that
way, two network_helper_opts srv_opts and cli_opts are used instead of
the previously shared opts.
Signed-off-by: Geliang Tang <tanggeliang@kylinos.cn>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/792ca3bb013fa06e618176da02d75e4f79a76733.1717054461.git.tanggeliang@kylinos.cn
|
|
For moving the "if (sk_stg_map)" block out of do_test(), extract the
code before this block as a new function start_test(). It creates
server-side and client-side sockets and returns them to the caller.
Signed-off-by: Geliang Tang <tanggeliang@kylinos.cn>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/48f2921ff9be958f5d3d28fe6bb7269a61cafa9f.1717054461.git.tanggeliang@kylinos.cn
|
|
This patch uses connect_to_fd_opts() instead of using connect_fd_to_fd()
and settcpca() in do_test() in prog_tests/bpf_tcp_ca.c to accept a struct
network_helper_opts argument.
Then define a dctcp dedicated post_socket_cb callback stg_post_socket_cb(),
invoking both settcpca() and bpf_map_update_elem() in it, and set it in
test_dctcp(). For passing map_fd into stg_post_socket_cb() callback, a new
member map_fd is added in struct cb_opts.
Add another "const struct network_helper_opts *cli_opts" to do_test() to
separate it from the server "opts".
Signed-off-by: Geliang Tang <tanggeliang@kylinos.cn>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/876ec90430865bc468e3b7f6fb2648420b075548.1717054461.git.tanggeliang@kylinos.cn
|
|
Cross-merge networking fixes after downstream PR.
No conflicts.
Adjacent changes:
drivers/net/ethernet/pensando/ionic/ionic_txrx.c
d9c04209990b ("ionic: Mark error paths in the data path as unlikely")
491aee894a08 ("ionic: fix kernel panic in XDP_TX action")
net/ipv6/ip6_fib.c
b4cb4a1391dc ("net: use unrcu_pointer() helper")
b01e1c030770 ("ipv6: fix possible race in __fib6_drop_pcpu_from()")
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
|
|
Similarly to `bpf_program`, support `bpf_map` automatic attachment in
`bpf_object__attach_skeleton`. Currently only struct_ops maps could be
attached.
On bpftool side, code-generate links in skeleton struct for struct_ops maps.
Similarly to `bpf_program_skeleton`, set links in `bpf_map_skeleton`.
On libbpf side, extend `bpf_map` with new `autoattach` field to support
enabling or disabling autoattach functionality, introducing
getter/setter for this field.
`bpf_object__(attach|detach)_skeleton` is extended with
attaching/detaching struct_ops maps logic.
Signed-off-by: Mykyta Yatsenko <yatsenko@meta.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20240605175135.117127-1-yatsenko@meta.com
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Pull networking fixes from Jakub Kicinski:
"Including fixes from BPF and big collection of fixes for WiFi core and
drivers.
Current release - regressions:
- vxlan: fix regression when dropping packets due to invalid src
addresses
- bpf: fix a potential use-after-free in bpf_link_free()
- xdp: revert support for redirect to any xsk socket bound to the
same UMEM as it can result in a corruption
- virtio_net:
- add missing lock protection when reading return code from
control_buf
- fix false-positive lockdep splat in DIM
- Revert "wifi: wilc1000: convert list management to RCU"
- wifi: ath11k: fix error path in ath11k_pcic_ext_irq_config
Previous releases - regressions:
- rtnetlink: make the "split" NLM_DONE handling generic, restore the
old behavior for two cases where we started coalescing those
messages with normal messages, breaking sloppily-coded userspace
- wifi:
- cfg80211: validate HE operation element parsing
- cfg80211: fix 6 GHz scan request building
- mt76: mt7615: add missing chanctx ops
- ath11k: move power type check to ASSOC stage, fix connecting to
6 GHz AP
- ath11k: fix WCN6750 firmware crash caused by 17 num_vdevs
- rtlwifi: ignore IEEE80211_CONF_CHANGE_RETRY_LIMITS
- iwlwifi: mvm: fix a crash on 7265
Previous releases - always broken:
- ncsi: prevent multi-threaded channel probing, a spec violation
- vmxnet3: disable rx data ring on dma allocation failure
- ethtool: init tsinfo stats if requested, prevent unintentionally
reporting all-zero stats on devices which don't implement any
- dst_cache: fix possible races in less common IPv6 features
- tcp: auth: don't consider TCP_CLOSE to be in TCP_AO_ESTABLISHED
- ax25: fix two refcounting bugs
- eth: ionic: fix kernel panic in XDP_TX action
Misc:
- tcp: count CLOSE-WAIT sockets for TCP_MIB_CURRESTAB"
* tag 'net-6.10-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (107 commits)
selftests: net: lib: set 'i' as local
selftests: net: lib: avoid error removing empty netns name
selftests: net: lib: support errexit with busywait
net: ethtool: fix the error condition in ethtool_get_phy_stats_ethtool()
ipv6: fix possible race in __fib6_drop_pcpu_from()
af_unix: Annotate data-race of sk->sk_shutdown in sk_diag_fill().
af_unix: Use skb_queue_len_lockless() in sk_diag_show_rqlen().
af_unix: Use skb_queue_empty_lockless() in unix_release_sock().
af_unix: Use unix_recvq_full_lockless() in unix_stream_connect().
af_unix: Annotate data-race of net->unx.sysctl_max_dgram_qlen.
af_unix: Annotate data-races around sk->sk_sndbuf.
af_unix: Annotate data-races around sk->sk_state in UNIX_DIAG.
af_unix: Annotate data-race of sk->sk_state in unix_stream_read_skb().
af_unix: Annotate data-races around sk->sk_state in sendmsg() and recvmsg().
af_unix: Annotate data-race of sk->sk_state in unix_accept().
af_unix: Annotate data-race of sk->sk_state in unix_stream_connect().
af_unix: Annotate data-races around sk->sk_state in unix_write_space() and poll().
af_unix: Annotate data-race of sk->sk_state in unix_inq_len().
af_unix: Annodate data-races around sk->sk_state for writers.
af_unix: Set sk->sk_state under unix_state_lock() for truly disconencted peer.
...
|
|
Pull tomoyo fixlet from Tetsuo Handa:
"Single patch to update project links, no behavior changes"
* tag 'tomoyo-pr-20240606' of git://git.code.sf.net/p/tomoyo/tomoyo:
tomoyo: update project links
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/efi/efi
Pull EFI fixes from Ard Biesheuvel:
- Ensure that .discard sections are really discarded in the EFI zboot
image build
- Return proper error numbers from efi-pstore
- Add __nocfi annotations to EFI runtime wrappers
* tag 'efi-fixes-for-v6.10-2' of git://git.kernel.org/pub/scm/linux/kernel/git/efi/efi:
efi: Add missing __nocfi annotations to runtime wrappers
efi: pstore: Return proper errors on UEFI failures
efi/libstub: zboot.lds: Discard .discard sections
|
|
Matthieu Baerts says:
====================
selftests: net: lib: small fixes
While looking at using 'lib.sh' for the MPTCP selftests [1], we found
some small issues with 'lib.sh'. Here they are:
- Patch 1: fix 'errexit' (set -e) support with busywait. 'errexit' is
supported in some functions, not all. A fix for v6.8+.
- Patch 2: avoid confusing error messages linked to the cleaning part
when the netns setup fails. A fix for v6.8+.
- Patch 3: set a variable as local to avoid accidentally changing the
value of a another one with the same name on the caller side. A fix
for v6.10-rc1+.
Link: https://lore.kernel.org/mptcp/5f4615c3-0621-43c5-ad25-55747a4350ce@kernel.org/T/ [1]
====================
Link: https://lore.kernel.org/r/20240605-upstream-net-20240605-selftests-net-lib-fixes-v1-0-b3afadd368c9@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
|
|
Without this, the 'i' variable declared before could be overridden by
accident, e.g.
for i in "${@}"; do
__ksft_status_merge "${i}" ## 'i' has been modified
foo "${i}" ## using 'i' with an unexpected value
done
After a quick look, it looks like 'i' is currently not used after having
been modified in __ksft_status_merge(), but still, better be safe than
sorry. I saw this while modifying the same file, not because I suspected
an issue somewhere.
Fixes: 596c8819cb78 ("selftests: forwarding: Have RET track kselftest framework constants")
Acked-by: Geliang Tang <geliang@kernel.org>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Reviewed-by: Hangbin Liu <liuhangbin@gmail.com>
Link: https://lore.kernel.org/r/20240605-upstream-net-20240605-selftests-net-lib-fixes-v1-3-b3afadd368c9@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
|
|
If there is an error to create the first netns with 'setup_ns()',
'cleanup_ns()' will be called with an empty string as first parameter.
The consequences is that 'cleanup_ns()' will try to delete an invalid
netns, and wait 20 seconds if the netns list is empty.
Instead of just checking if the name is not empty, convert the string
separated by spaces to an array. Manipulating the array is cleaner, and
calling 'cleanup_ns()' with an empty array will be a no-op.
Fixes: 25ae948b4478 ("selftests/net: add lib.sh")
Cc: stable@vger.kernel.org
Acked-by: Geliang Tang <geliang@kernel.org>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: Hangbin Liu <liuhangbin@gmail.com>
Link: https://lore.kernel.org/r/20240605-upstream-net-20240605-selftests-net-lib-fixes-v1-2-b3afadd368c9@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
|
|
If errexit is enabled ('set -e'), loopy_wait -- or busywait and others
using it -- will stop after the first failure.
Note that if the returned status of loopy_wait is checked, and even if
errexit is enabled, Bash will not stop at the first error.
Fixes: 25ae948b4478 ("selftests/net: add lib.sh")
Cc: stable@vger.kernel.org
Acked-by: Geliang Tang <geliang@kernel.org>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Reviewed-by: Hangbin Liu <liuhangbin@gmail.com>
Link: https://lore.kernel.org/r/20240605-upstream-net-20240605-selftests-net-lib-fixes-v1-1-b3afadd368c9@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
|
|
The added selftests verify that for every BTF kind we iterate correctly
over consituent strings and ids.
Signed-off-by: Alan Maguire <alan.maguire@oracle.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20240605153314.3727466-1-alan.maguire@oracle.com
|
|
Alexei reported that send_signal test may fail with nested CONFIG_PARAVIRT
configs. In this particular case, the base VM is AMD with 166 cpus, and I
run selftests with regular qemu on top of that and indeed send_signal test
failed. I also tried with an Intel box with 80 cpus and there is no issue.
The main qemu command line includes:
-enable-kvm -smp 16 -cpu host
The failure log looks like:
$ ./test_progs -t send_signal
[ 48.501588] watchdog: BUG: soft lockup - CPU#9 stuck for 26s! [test_progs:2225]
[ 48.503622] Modules linked in: bpf_testmod(O)
[ 48.503622] CPU: 9 PID: 2225 Comm: test_progs Tainted: G O 6.9.0-08561-g2c1713a8f1c9-dirty #69
[ 48.507629] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.15.0-0-g2dd4b9b3f840-prebuilt.qemu.org 04/01/2014
[ 48.511635] RIP: 0010:handle_softirqs+0x71/0x290
[ 48.511635] Code: [...] 10 0a 00 00 00 31 c0 65 66 89 05 d5 f4 fa 7e fb bb ff ff ff ff <49> c7 c2 cb
[ 48.518527] RSP: 0018:ffffc90000310fa0 EFLAGS: 00000246
[ 48.519579] RAX: 0000000000000000 RBX: 00000000ffffffff RCX: 00000000000006e0
[ 48.522526] RDX: 0000000000000006 RSI: ffff88810791ae80 RDI: 0000000000000000
[ 48.523587] RBP: ffffc90000fabc88 R08: 00000005a0af4f7f R09: 0000000000000000
[ 48.525525] R10: 0000000561d2f29c R11: 0000000000006534 R12: 0000000000000280
[ 48.528525] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[ 48.528525] FS: 00007f2f2885cd00(0000) GS:ffff888237c40000(0000) knlGS:0000000000000000
[ 48.531600] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 48.535520] CR2: 00007f2f287059f0 CR3: 0000000106a28002 CR4: 00000000003706f0
[ 48.537538] Call Trace:
[ 48.537538] <IRQ>
[ 48.537538] ? watchdog_timer_fn+0x1cd/0x250
[ 48.539590] ? lockup_detector_update_enable+0x50/0x50
[ 48.539590] ? __hrtimer_run_queues+0xff/0x280
[ 48.542520] ? hrtimer_interrupt+0x103/0x230
[ 48.544524] ? __sysvec_apic_timer_interrupt+0x4f/0x140
[ 48.545522] ? sysvec_apic_timer_interrupt+0x3a/0x90
[ 48.547612] ? asm_sysvec_apic_timer_interrupt+0x1a/0x20
[ 48.547612] ? handle_softirqs+0x71/0x290
[ 48.547612] irq_exit_rcu+0x63/0x80
[ 48.551585] sysvec_apic_timer_interrupt+0x75/0x90
[ 48.552521] </IRQ>
[ 48.553529] <TASK>
[ 48.553529] asm_sysvec_apic_timer_interrupt+0x1a/0x20
[ 48.555609] RIP: 0010:finish_task_switch.isra.0+0x90/0x260
[ 48.556526] Code: [...] 9f 58 0a 00 00 48 85 db 0f 85 89 01 00 00 4c 89 ff e8 53 d9 bd 00 fb 66 90 <4d> 85 ed 74
[ 48.562524] RSP: 0018:ffffc90000fabd38 EFLAGS: 00000282
[ 48.563589] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff83385620
[ 48.563589] RDX: ffff888237c73ae4 RSI: 0000000000000000 RDI: ffff888237c6fd00
[ 48.568521] RBP: ffffc90000fabd68 R08: 0000000000000000 R09: 0000000000000000
[ 48.569528] R10: 0000000000000001 R11: 0000000000000000 R12: ffff8881009d0000
[ 48.573525] R13: ffff8881024e5400 R14: ffff88810791ae80 R15: ffff888237c6fd00
[ 48.575614] ? finish_task_switch.isra.0+0x8d/0x260
[ 48.576523] __schedule+0x364/0xac0
[ 48.577535] schedule+0x2e/0x110
[ 48.578555] pipe_read+0x301/0x400
[ 48.579589] ? destroy_sched_domains_rcu+0x30/0x30
[ 48.579589] vfs_read+0x2b3/0x2f0
[ 48.579589] ksys_read+0x8b/0xc0
[ 48.583590] do_syscall_64+0x3d/0xc0
[ 48.583590] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 48.586525] RIP: 0033:0x7f2f28703fa1
[ 48.587592] Code: [...] 00 00 00 0f 1f 44 00 00 f3 0f 1e fa 80 3d c5 23 14 00 00 74 13 31 c0 0f 05 <48> 3d 00 f0
[ 48.593534] RSP: 002b:00007ffd90f8cf88 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
[ 48.595589] RAX: ffffffffffffffda RBX: 00007ffd90f8d5e8 RCX: 00007f2f28703fa1
[ 48.595589] RDX: 0000000000000001 RSI: 00007ffd90f8cfb0 RDI: 0000000000000006
[ 48.599592] RBP: 00007ffd90f8d2f0 R08: 0000000000000064 R09: 0000000000000000
[ 48.602527] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
[ 48.603589] R13: 00007ffd90f8d608 R14: 00007f2f288d8000 R15: 0000000000f6bdb0
[ 48.605527] </TASK>
In the test, two processes are communicating through pipe. Further debugging
with strace found that the above splat is triggered as read() syscall could
not receive the data even if the corresponding write() syscall in another
process successfully wrote data into the pipe.
The failed subtest is "send_signal_perf". The corresponding perf event has
sample_period 1 and config PERF_COUNT_SW_CPU_CLOCK. sample_period 1 means every
overflow event will trigger a call to the BPF program. So I suspect this may
overwhelm the system. So I increased the sample_period to 100,000 and the test
passed. The sample_period 10,000 still has the test failed.
In other parts of selftest, e.g., [1], sample_freq is used instead. So I
decided to use sample_freq = 1,000 since the test can pass as well.
[1] https://lore.kernel.org/bpf/20240604070700.3032142-1-song@kernel.org/
Reported-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Yonghong Song <yonghong.song@linux.dev>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20240605201203.2603846-1-yonghong.song@linux.dev
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Eric Dumazet says:
====================
tcp: small code reorg
Replace a WARN_ON_ONCE() that never triggered
to DEBUG_NET_WARN_ON_ONCE() in reqsk_free().
Move inet_reqsk_alloc() and reqsk_alloc()
to inet_connection_sock.c, to unclutter
net/ipv4/tcp_input.c and include/net/request_sock.h
====================
Link: https://lore.kernel.org/r/20240605071553.1365557-1-edumazet@google.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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reqsk_alloc() has a single caller, no need to expose it
in include/net/request_sock.h.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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inet_reqsk_alloc() does not belong to tcp_input.c,
move it to inet_connection_sock.c instead.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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In reqsk_free(), use DEBUG_NET_WARN_ON_ONCE()
instead of WARN_ON_ONCE() for a condition which never fired.
In reqsk_put() directly call __reqsk_free(), there is no
point checking rsk_refcnt again right after a transition to zero.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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Matthieu Baerts says:
====================
mptcp: misc. cleanups
Here is a small collection of miscellaneous cleanups:
- Patch 1 uses an MPTCP helper, instead of a TCP one, to do the same
thing.
- Patch 2 adds a similar MPTCP helper, instead of using a TCP one
directly.
- Patch 3 uses more appropriated terms in comments.
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
====================
Link: https://lore.kernel.org/r/20240605-upstream-net-next-20240604-misc-cleanup-v1-0-ae2e35c3ecc5@kernel.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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