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secmark context is artificially limited 256 bytes, rise it to 4Kbytes.
Fixes: fb961945457f ("netfilter: nf_tables: add SECMARK support")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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nft_ctx is huge and most of the information stored within isn't used
at all.
Remove nft_ctx member from the base transaction structure and store
only what is needed.
After this change, relevant struct sizes are:
struct nft_trans_chain { /* size: 120 (-32), cachelines: 2, members: 10 */
struct nft_trans_elem { /* size: 72 (-40), cachelines: 2, members: 4 */
struct nft_trans_flowtable { /* size: 80 (-48), cachelines: 2, members: 5 */
struct nft_trans_obj { /* size: 72 (-40), cachelines: 2, members: 4 */
struct nft_trans_rule { /* size: 80 (-32), cachelines: 2, members: 6 */
struct nft_trans_set { /* size: 96 (-24), cachelines: 2, members: 8 */
struct nft_trans_table { /* size: 56 (-40), cachelines: 1, members: 2 */
struct nft_trans_elem can now be allocated from kmalloc-96 instead of
kmalloc-128 slab.
A further reduction by 8 bytes would even allow for kmalloc-64.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Currently the chain can be derived from trans->ctx.chain, but
the ctx will go away soon.
Thus add the chain pointer to nft_trans_rule structure itself.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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It would be better to not store nft_ctx inside nft_trans object,
the netlink ctx strucutre is huge and most of its information is
never needed in places that use trans->ctx.
Avoid/reduce its usage if possible, no runtime behaviour change
intended.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Cover holes to reduce both structures by 8 byte.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Only nft_trans_chain and nft_trans_set subtypes use the
trans->binding_list member.
Add a new common binding subtype and move the member there.
This reduces size of all other subtypes by 16 bytes on 64bit platforms.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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There is 'struct nft_trans', the basic structure for all transactional
objects, and the the various different transactional objects, such as
nft_trans_table, chain, set, set_elem and so on.
Right now 'struct nft_trans' uses a flexible member at the tail
(data[]), and casting is needed to access the actual type-specific
members.
Change this to make the hierarchy visible in source code, i.e. make
struct nft_trans the first member of all derived subtypes.
This has several advantages:
1. pahole output reflects the real size needed by the particular subtype
2. allows to use container_of() to convert the base type to the actual
object type instead of casting ->data to the overlay structure.
3. It makes it easy to add intermediate types.
'struct nft_trans' contains a 'binding_list' that is only needed
by two subtypes, so it should be part of the two subtypes, not in
the base structure.
But that makes it hard to interate over the binding_list, because
there is no common base structure.
A follow patch moves the bind list to a new struct:
struct nft_trans_binding {
struct nft_trans nft_trans;
struct list_head binding_list;
};
... and makes that structure the new 'first member' for both
nft_trans_chain and nft_trans_set.
No functional change intended in this patch.
Some numbers:
struct nft_trans { /* size: 88, cachelines: 2, members: 5 */
struct nft_trans_chain { /* size: 152, cachelines: 3, members: 10 */
struct nft_trans_elem { /* size: 112, cachelines: 2, members: 4 */
struct nft_trans_flowtable { /* size: 128, cachelines: 2, members: 5 */
struct nft_trans_obj { /* size: 112, cachelines: 2, members: 4 */
struct nft_trans_rule { /* size: 112, cachelines: 2, members: 5 */
struct nft_trans_set { /* size: 120, cachelines: 2, members: 8 */
struct nft_trans_table { /* size: 96, cachelines: 2, members: 2 */
Of particular interest is nft_trans_elem, which needs to be allocated
once for each pending (to be added or removed) set element.
Add BUILD_BUG_ON to check struct nft_trans is placed at the top of
the container structure.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Commit 1971d13ffa84 ("af_unix: Suppress false-positive lockdep splat for
spin_lock() in __unix_gc().") added U_LOCK_GC_LISTENER for the old GC,
but it's no longer needed for the new GC.
Let's remove U_LOCK_GC_LISTENER and unix_state_lock_nested() as there's
no user.
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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sk_diag_dump_icons() acquires embryo's lock by unix_state_lock_nested()
to fetch its peer.
The embryo's ->peer is set to NULL only when its parent listener is
close()d. Then, unix_release_sock() is called for each embryo after
unlinking skb by skb_dequeue().
In sk_diag_dump_icons(), we hold the parent's recvq lock, so we need
not acquire unix_state_lock_nested(), and peer is always non-NULL.
Let's remove unnecessary unix_state_lock_nested() and non-NULL test
for peer.
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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While a SOCK_(STREAM|SEQPACKET) socket connect()s to another, we hold
two locks of them by unix_state_lock() and unix_state_lock_nested() in
unix_stream_connect().
Before unix_state_lock_nested(), the following is guaranteed by checking
sk->sk_state:
1. The first socket is TCP_LISTEN
2. The second socket is not the first one
3. Simultaneous connect() must fail
So, the client state can be TCP_CLOSE or TCP_LISTEN or TCP_ESTABLISHED.
Let's define the expected states as unix_state_lock_cmp_fn() instead of
using unix_state_lock_nested().
Note that 2. is detected by debug_spin_lock_before() and 3. cannot be
expressed as lock_cmp_fn.
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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The per-CPU flush lists, which are accessed from within the NAPI callback
(xdp_do_flush() for instance), are per-CPU. There are subject to the
same problem as struct bpf_redirect_info.
Add the per-CPU lists cpu_map_flush_list, dev_map_flush_list and
xskmap_map_flush_list to struct bpf_net_context. Add wrappers for the
access. The lists initialized on first usage (similar to
bpf_net_ctx_get_ri()).
Cc: "Björn Töpel" <bjorn@kernel.org>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Andrii Nakryiko <andrii@kernel.org>
Cc: Eduard Zingerman <eddyz87@gmail.com>
Cc: Hao Luo <haoluo@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: Jonathan Lemon <jonathan.lemon@gmail.com>
Cc: KP Singh <kpsingh@kernel.org>
Cc: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Cc: Magnus Karlsson <magnus.karlsson@intel.com>
Cc: Martin KaFai Lau <martin.lau@linux.dev>
Cc: Song Liu <song@kernel.org>
Cc: Stanislav Fomichev <sdf@google.com>
Cc: Yonghong Song <yonghong.song@linux.dev>
Acked-by: Jesper Dangaard Brouer <hawk@kernel.org>
Reviewed-by: Toke Høiland-Jørgensen <toke@redhat.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Link: https://patch.msgid.link/20240620132727.660738-16-bigeasy@linutronix.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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The XDP redirect process is two staged:
- bpf_prog_run_xdp() is invoked to run a eBPF program which inspects the
packet and makes decisions. While doing that, the per-CPU variable
bpf_redirect_info is used.
- Afterwards xdp_do_redirect() is invoked and accesses bpf_redirect_info
and it may also access other per-CPU variables like xskmap_flush_list.
At the very end of the NAPI callback, xdp_do_flush() is invoked which
does not access bpf_redirect_info but will touch the individual per-CPU
lists.
The per-CPU variables are only used in the NAPI callback hence disabling
bottom halves is the only protection mechanism. Users from preemptible
context (like cpu_map_kthread_run()) explicitly disable bottom halves
for protections reasons.
Without locking in local_bh_disable() on PREEMPT_RT this data structure
requires explicit locking.
PREEMPT_RT has forced-threaded interrupts enabled and every
NAPI-callback runs in a thread. If each thread has its own data
structure then locking can be avoided.
Create a struct bpf_net_context which contains struct bpf_redirect_info.
Define the variable on stack, use bpf_net_ctx_set() to save a pointer to
it, bpf_net_ctx_clear() removes it again.
The bpf_net_ctx_set() may nest. For instance a function can be used from
within NET_RX_SOFTIRQ/ net_rx_action which uses bpf_net_ctx_set() and
NET_TX_SOFTIRQ which does not. Therefore only the first invocations
updates the pointer.
Use bpf_net_ctx_get_ri() as a wrapper to retrieve the current struct
bpf_redirect_info. The returned data structure is zero initialized to
ensure nothing is leaked from stack. This is done on first usage of the
struct. bpf_net_ctx_set() sets bpf_redirect_info::kern_flags to 0 to
note that initialisation is required. First invocation of
bpf_net_ctx_get_ri() will memset() the data structure and update
bpf_redirect_info::kern_flags.
bpf_redirect_info::nh is excluded from memset because it is only used
once BPF_F_NEIGH is set which also sets the nh member. The kern_flags is
moved past nh to exclude it from memset.
The pointer to bpf_net_context is saved task's task_struct. Using
always the bpf_net_context approach has the advantage that there is
almost zero differences between PREEMPT_RT and non-PREEMPT_RT builds.
Cc: Andrii Nakryiko <andrii@kernel.org>
Cc: Eduard Zingerman <eddyz87@gmail.com>
Cc: Hao Luo <haoluo@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: KP Singh <kpsingh@kernel.org>
Cc: Martin KaFai Lau <martin.lau@linux.dev>
Cc: Song Liu <song@kernel.org>
Cc: Stanislav Fomichev <sdf@google.com>
Cc: Yonghong Song <yonghong.song@linux.dev>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Jesper Dangaard Brouer <hawk@kernel.org>
Reviewed-by: Toke Høiland-Jørgensen <toke@redhat.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Link: https://patch.msgid.link/20240620132727.660738-15-bigeasy@linutronix.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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The access to seg6_bpf_srh_states is protected by disabling preemption.
Based on the code, the entry point is input_action_end_bpf() and
every other function (the bpf helper functions bpf_lwt_seg6_*()), that
is accessing seg6_bpf_srh_states, should be called from within
input_action_end_bpf().
input_action_end_bpf() accesses seg6_bpf_srh_states first at the top of
the function and then disables preemption. This looks wrong because if
preemption needs to be disabled as part of the locking mechanism then
the variable shouldn't be accessed beforehand.
Looking at how it is used via test_lwt_seg6local.sh then
input_action_end_bpf() is always invoked from softirq context. If this
is always the case then the preempt_disable() statement is superfluous.
If this is not always invoked from softirq then disabling only
preemption is not sufficient.
Replace the preempt_disable() statement with nested-BH locking. This is
not an equivalent replacement as it assumes that the invocation of
input_action_end_bpf() always occurs in softirq context and thus the
preempt_disable() is superfluous.
Add a local_lock_t the data structure and use local_lock_nested_bh() for
locking. Add lockdep_assert_held() to ensure the lock is held while the
per-CPU variable is referenced in the helper functions.
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Andrii Nakryiko <andrii@kernel.org>
Cc: David Ahern <dsahern@kernel.org>
Cc: Hao Luo <haoluo@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: KP Singh <kpsingh@kernel.org>
Cc: Martin KaFai Lau <martin.lau@linux.dev>
Cc: Song Liu <song@kernel.org>
Cc: Stanislav Fomichev <sdf@google.com>
Cc: Yonghong Song <yonghong.song@linux.dev>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Link: https://patch.msgid.link/20240620132727.660738-13-bigeasy@linutronix.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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softnet_data::process_queue is a per-CPU variable and relies on disabled
BH for its locking. Without per-CPU locking in local_bh_disable() on
PREEMPT_RT this data structure requires explicit locking.
softnet_data::input_queue_head can be updated lockless. This is fine
because this value is only update CPU local by the local backlog_napi
thread.
Add a local_lock_t to softnet_data and use local_lock_nested_bh() for locking
of process_queue. This change adds only lockdep coverage and does not
alter the functional behaviour for !PREEMPT_RT.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Link: https://patch.msgid.link/20240620132727.660738-11-bigeasy@linutronix.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Softirq is preemptible on PREEMPT_RT. Without a per-CPU lock in
local_bh_disable() there is no guarantee that only one device is
transmitting at a time.
With preemption and multiple senders it is possible that the per-CPU
`recursion' counter gets incremented by different threads and exceeds
XMIT_RECURSION_LIMIT leading to a false positive recursion alert.
The `more' member is subject to similar problems if set by one thread
for one driver and wrongly used by another driver within another thread.
Instead of adding a lock to protect the per-CPU variable it is simpler
to make xmit per-task. Sending and receiving skbs happens always
in thread context anyway.
Having a lock to protected the per-CPU counter would block/ serialize two
sending threads needlessly. It would also require a recursive lock to
ensure that the owner can increment the counter further.
Make the softnet_data.xmit a task_struct member on PREEMPT_RT. Add
needed wrapper.
Cc: Ben Segall <bsegall@google.com>
Cc: Daniel Bristot de Oliveira <bristot@redhat.com>
Cc: Dietmar Eggemann <dietmar.eggemann@arm.com>
Cc: Juri Lelli <juri.lelli@redhat.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Valentin Schneider <vschneid@redhat.com>
Cc: Vincent Guittot <vincent.guittot@linaro.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Link: https://patch.msgid.link/20240620132727.660738-9-bigeasy@linutronix.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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ipv4_tcp_sk is a per-CPU variable and relies on disabled BH for its
locking. Without per-CPU locking in local_bh_disable() on PREEMPT_RT
this data structure requires explicit locking.
Make a struct with a sock member (original ipv4_tcp_sk) and a
local_lock_t and use local_lock_nested_bh() for locking. This change
adds only lockdep coverage and does not alter the functional behaviour
for !PREEMPT_RT.
Cc: David Ahern <dsahern@kernel.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Link: https://patch.msgid.link/20240620132727.660738-7-bigeasy@linutronix.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Add local_lock_nested_bh() locking. It is based on local_lock_t and the
naming follows the preempt_disable_nested() example.
For !PREEMPT_RT + !LOCKDEP it is a per-CPU annotation for locking
assumptions based on local_bh_disable(). The macro is optimized away
during compilation.
For !PREEMPT_RT + LOCKDEP the local_lock_nested_bh() is reduced to
the usual lock-acquire plus lockdep_assert_in_softirq() - ensuring that
BH is disabled.
For PREEMPT_RT local_lock_nested_bh() acquires the specified per-CPU
lock. It does not disable CPU migration because it relies on
local_bh_disable() disabling CPU migration.
With LOCKDEP it performans the usual lockdep checks as with !PREEMPT_RT.
Due to include hell the softirq check has been moved spinlock.c.
The intention is to use this locking in places where locking of a per-CPU
variable relies on BH being disabled. Instead of treating disabled
bottom halves as a big per-CPU lock, PREEMPT_RT can use this to reduce
the locking scope to what actually needs protecting.
A side effect is that it also documents the protection scope of the
per-CPU variables.
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Link: https://patch.msgid.link/20240620132727.660738-3-bigeasy@linutronix.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Introduce lock guard definition for local_lock_t. There are no users
yet.
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Link: https://patch.msgid.link/20240620132727.660738-2-bigeasy@linutronix.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can-next
Marc Kleine-Budde says:
====================
pull-request: can-next 2024-06-21
The first 2 patches are by Andy Shevchenko, one cleans up the includes
in the mcp251x driver, the other one updates the sja100 plx_pci driver
to make use of predefines PCI subvendor ID.
Mans Rullgard's patch cleans up the Kconfig help text of for the slcan
driver.
Oliver Hartkopp provides a patch to update the documentation, which
removes the ISO 15675-2 specification version where possible.
The next 2 patches are by Harini T and update the documentation of the
xilinx_can driver.
Francesco Valla provides documentation for the ISO 15765-2 protocol.
A patch by Dr. David Alan Gilbert removes an unused struct from the
mscan driver.
12 patches are by Martin Jocic. The first three add support for 3 new
devices to the kvaser_usb driver. The remaining 9 first clean up the
kvaser_pciefd driver, and then add support for MSI.
Krzysztof Kozlowski contributes 3 patches simplifies the CAN SPI
drivers by making use of spi_get_device_match_data().
The last patch is by Martin Hundebøll, which reworks the m_can driver
to not enable the CAN transceiver during probe.
* tag 'linux-can-next-for-6.11-20240621' of git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can-next: (24 commits)
can: m_can: don't enable transceiver when probing
can: mcp251xfd: simplify with spi_get_device_match_data()
can: mcp251x: simplify with spi_get_device_match_data()
can: hi311x: simplify with spi_get_device_match_data()
can: kvaser_pciefd: Add MSI interrupts
can: kvaser_pciefd: Move reset of DMA RX buffers to the end of the ISR
can: kvaser_pciefd: Change name of return code variable
can: kvaser_pciefd: Rename board_irq to pci_irq
can: kvaser_pciefd: Add unlikely
can: kvaser_pciefd: Add inline
can: kvaser_pciefd: Remove unnecessary comment
can: kvaser_pciefd: Skip redundant NULL pointer check in ISR
can: kvaser_pciefd: Group #defines together
can: kvaser_usb: Add support for Kvaser Mini PCIe 1xCAN
can: kvaser_usb: Add support for Kvaser USBcan Pro 5xCAN
can: kvaser_usb: Add support for Vining 800
can: mscan: remove unused struct 'mscan_state'
Documentation: networking: document ISO 15765-2
can: xilinx_can: Document driver description to list all supported IPs
can: isotp: remove ISO 15675-2 specification version where possible
...
====================
Link: https://patch.msgid.link/20240621080201.305471-1-mkl@pengutronix.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Cross-merge networking fixes after downstream PR.
Conflicts:
drivers/net/ethernet/broadcom/bnxt/bnxt.c
1e7962114c10 ("bnxt_en: Restore PTP tx_avail count in case of skb_pad() error")
165f87691a89 ("bnxt_en: add timestamping statistics support")
No adjacent changes.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Pull networking fixes from Jakub Kicinski:
"Including fixes from wireless, bpf and netfilter.
Happy summer solstice! The line count is a bit inflated by a selftest
and update to a driver's FW interface header, in reality this is
slightly below average for us. We are expecting one driver fix from
Intel, but there are no big known issues.
Current release - regressions:
- ipv6: bring NLM_DONE out to a separate recv() again
Current release - new code bugs:
- wifi: cfg80211: wext: set ssids=NULL for passive scans via old wext API
Previous releases - regressions:
- wifi: mac80211: fix monitor channel setting with chanctx emulation
(probably most awaited of the fixes in this PR, tracked by Thorsten)
- usb: ax88179_178a: bring back reset on init, if PHY is disconnected
- bpf: fix UML x86_64 compile failure with BPF
- bpf: avoid splat in pskb_pull_reason(), sanity check added can be hit
with malicious BPF
- eth: mvpp2: use slab_build_skb() for packets in slab, driver was
missed during API refactoring
- wifi: iwlwifi: add missing unlock of mvm mutex
Previous releases - always broken:
- ipv6: add a number of missing null-checks for in6_dev_get(), in case
IPv6 disabling races with the datapath
- bpf: fix reg_set_min_max corruption of fake_reg
- sched: act_ct: add netns as part of the key of tcf_ct_flow_table"
* tag 'net-6.10-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (63 commits)
net: usb: rtl8150 fix unintiatilzed variables in rtl8150_get_link_ksettings
selftests: virtio_net: add forgotten config options
bnxt_en: Restore PTP tx_avail count in case of skb_pad() error
bnxt_en: Set TSO max segs on devices with limits
bnxt_en: Update firmware interface to 1.10.3.44
net: stmmac: Assign configured channel value to EXTTS event
net: do not leave a dangling sk pointer, when socket creation fails
net/tcp_ao: Don't leak ao_info on error-path
ice: Fix VSI list rule with ICE_SW_LKUP_LAST type
ipv6: bring NLM_DONE out to a separate recv() again
selftests: add selftest for the SRv6 End.DX6 behavior with netfilter
selftests: add selftest for the SRv6 End.DX4 behavior with netfilter
netfilter: move the sysctl nf_hooks_lwtunnel into the netfilter core
seg6: fix parameter passing when calling NF_HOOK() in End.DX4 and End.DX6 behaviors
netfilter: ipset: Fix suspicious rcu_dereference_protected()
selftests: openvswitch: Set value to nla flags.
octeontx2-pf: Fix linking objects into multiple modules
octeontx2-pf: Add error handling to VLAN unoffload handling
virtio_net: fixing XDP for fully checksummed packets handling
virtio_net: checksum offloading handling fix
...
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With the new ISO 15765-2:2024 release the former documentation and comments
have to be reworked. This patch removes the ISO specification version/date
where possible.
Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
Acked-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr>
Acked-by: Francesco Valla <valla.francesco@gmail.com>
Link: https://lore.kernel.org/all/20240420194746.4885-1-socketcan@hartkopp.net
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
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Currently, the sysctl net.netfilter.nf_hooks_lwtunnel depends on the
nf_conntrack module, but the nf_conntrack module is not always loaded.
Therefore, accessing net.netfilter.nf_hooks_lwtunnel may have an error.
Move sysctl nf_hooks_lwtunnel into the netfilter core.
Fixes: 7a3f5b0de364 ("netfilter: add netfilter hooks to SRv6 data plane")
Suggested-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Jianguo Wu <wujianguo@chinatelecom.cn>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Long used destructors kfree_skb and kfree_skb_reason do not pass
receiving socket to packet drop tracepoints trace_kfree_skb.
This makes it hard to track packet drops of a certain netns (container)
or a socket (user application).
The naming of these destructors are also not consistent with most sk/skb
operating functions, i.e. functions named "sk_xxx" or "skb_xxx".
Introduce a new functions sk_skb_reason_drop as drop-in replacement for
kfree_skb_reason on local receiving path. Callers can now pass receiving
sockets to the tracepoints.
kfree_skb and kfree_skb_reason are still usable but they are now just
inline helpers that call sk_skb_reason_drop.
Note it is not feasible to do the same to consume_skb. Packets not
dropped can flow through multiple receive handlers, and have multiple
receiving sockets. Leave it untouched for now.
Suggested-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Yan Zhai <yan@cloudflare.com>
Acked-by: Jesper Dangaard Brouer <hawk@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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skb does not include enough information to find out receiving
sockets/services and netns/containers on packet drops. In theory
skb->dev tells about netns, but it can get cleared/reused, e.g. by TCP
stack for OOO packet lookup. Similarly, skb->sk often identifies a local
sender, and tells nothing about a receiver.
Allow passing an extra receiving socket to the tracepoint to improve
the visibility on receiving drops.
Signed-off-by: Yan Zhai <yan@cloudflare.com>
Acked-by: Jesper Dangaard Brouer <hawk@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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As defined by the MANA Hardware spec, the queue size for DMA is 4KB
minimal, and power of 2. And, the HWC queue size has to be exactly
4KB.
To support page sizes other than 4KB on ARM64, define the minimal
queue size as a macro separately from the PAGE_SIZE, which we always
assumed it to be 4KB before supporting ARM64.
Also, add MANA specific macros and update code related to size
alignment, DMA region calculations, etc.
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Reviewed-by: Michael Kelley <mhklinux@outlook.com>
Link: https://lore.kernel.org/r/1718655446-6576-1-git-send-email-haiyangz@microsoft.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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10G-QXGMII is a MAC-to-PHY interface defined by the USXGMII multiport
specification. It uses the same signaling as USXGMII, but it multiplexes
4 ports over the link, resulting in a maximum speed of 2.5G per port.
Some in-tree SoCs like the NXP LS1028A use "usxgmii" when they mean
either the single-port USXGMII or the quad-port 10G-QXGMII variant, and
they could get away just fine with that thus far. But there is a need to
distinguish between the 2 as far as SerDes drivers are concerned.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: Luo Jie <quic_luoj@quicinc.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/lsm
Pull lsm fix from Paul Moore:
"A single LSM/IMA patch to fix a problem caused by sleeping while in a
RCU critical section"
* tag 'lsm-pr-20240617' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/lsm:
ima: Avoid blocking in RCU read-side critical section
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This declaration was added to the header to be called from ethtool.
ethtool is separated from core for code organization but it is not really
a separate entity, it controls very core things.
As ethtool is an internal stuff it is not wise to have it in netdevice.h.
Move the declaration to net/core/dev.h instead.
Remove the EXPORT_SYMBOL_GPL call as ethtool can not be built as a module.
Reviewed-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Kory Maincent <kory.maincent@bootlin.com>
Link: https://lore.kernel.org/r/20240612-feature_ptp_netnext-v15-2-b2a086257b63@bootlin.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull misc fixes from Andrew Morton:
"Mainly MM singleton fixes. And a couple of ocfs2 regression fixes"
* tag 'mm-hotfixes-stable-2024-06-17-11-43' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm:
kcov: don't lose track of remote references during softirqs
mm: shmem: fix getting incorrect lruvec when replacing a shmem folio
mm/debug_vm_pgtable: drop RANDOM_ORVALUE trick
mm: fix possible OOB in numa_rebuild_large_mapping()
mm/migrate: fix kernel BUG at mm/compaction.c:2761!
selftests: mm: make map_fixed_noreplace test names stable
mm/memfd: add documentation for MFD_NOEXEC_SEAL MFD_EXEC
mm: mmap: allow for the maximum number of bits for randomizing mmap_base by default
gcov: add support for GCC 14
zap_pid_ns_processes: clear TIF_NOTIFY_SIGNAL along with TIF_SIGPENDING
mm: huge_memory: fix misused mapping_large_folio_support() for anon folios
lib/alloc_tag: fix RCU imbalance in pgalloc_tag_get()
lib/alloc_tag: do not register sysctl interface when CONFIG_SYSCTL=n
MAINTAINERS: remove Lorenzo as vmalloc reviewer
Revert "mm: init_mlocked_on_free_v3"
mm/page_table_check: fix crash on ZONE_DEVICE
gcc: disable '-Warray-bounds' for gcc-9
ocfs2: fix NULL pointer dereference in ocfs2_abort_trigger()
ocfs2: fix NULL pointer dereference in ocfs2_journal_dirty()
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git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
Pull hardening fixes from Kees Cook:
- yama: document function parameter (Christian Göttsche)
- mm/util: Swap kmemdup_array() arguments (Jean-Philippe Brucker)
- kunit/overflow: Adjust for __counted_by with DEFINE_RAW_FLEX()
- MAINTAINERS: Update entries for Kees Cook
* tag 'hardening-v6.10-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
MAINTAINERS: Update entries for Kees Cook
kunit/overflow: Adjust for __counted_by with DEFINE_RAW_FLEX()
yama: document function parameter
mm/util: Swap kmemdup_array() arguments
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This patch allows to create smc socket via AF_INET,
similar to the following code,
/* create v4 smc sock */
v4 = socket(AF_INET, SOCK_STREAM, IPPROTO_SMC);
/* create v6 smc sock */
v6 = socket(AF_INET6, SOCK_STREAM, IPPROTO_SMC);
There are several reasons why we believe it is appropriate here:
1. For smc sockets, it actually use IPv4 (AF-INET) or IPv6 (AF-INET6)
address. There is no AF_SMC address at all.
2. Create smc socket in the AF_INET(6) path, which allows us to reuse
the infrastructure of AF_INET(6) path, such as common ebpf hooks.
Otherwise, smc have to implement it again in AF_SMC path.
Signed-off-by: D. Wythe <alibuda@linux.alibaba.com>
Reviewed-by: Wenjia Zhang <wenjia@linux.ibm.com>
Reviewed-by: Dust Li <dust.li@linux.alibaba.com>
Tested-by: Niklas Schnelle <schnelle@linux.ibm.com>
Tested-by: Wenjia Zhang <wenjia@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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I find the behavior of xa_for_each_start() slightly counter-intuitive.
It doesn't end the iteration by making the index point after the last
element. IOW calling xa_for_each_start() again after it "finished"
will run the body of the loop for the last valid element, instead
of doing nothing.
This works fine for netlink dumps if they terminate correctly
(i.e. coalesce or carefully handle NLM_DONE), but as we keep getting
reminded legacy dumps are unlikely to go away.
Fixing this generically at the xa_for_each_start() level seems hard -
there is no index reserved for "end of iteration".
ifindexes are 31b wide, tho, and iterator is ulong so for
for_each_netdev_dump() it's safe to go to the next element.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@intel.com>
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 / Thunderbolt fixes from Greg KH:
"Here are some small USB and Thunderbolt driver fixes for 6.10-rc4.
Included in here are:
- thunderbolt debugfs bugfix
- USB typec bugfixes
- kcov usb bugfix
- xhci bugfixes
- usb-storage bugfix
- dt-bindings bugfix
- cdc-wdm log message spam bugfix
All of these, except for the last cdc-wdm log level change, have been
in linux-next for a while with no reported problems. The cdc-wdm
bugfix has been tested by syzbot and proved to fix the reported cpu
lockup issues when the log is constantly spammed by a broken device"
* tag 'usb-6.10-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
USB: class: cdc-wdm: Fix CPU lockup caused by excessive log messages
xhci: Handle TD clearing for multiple streams case
xhci: Apply broken streams quirk to Etron EJ188 xHCI host
xhci: Apply reset resume quirk to Etron EJ188 xHCI host
xhci: Set correct transferred length for cancelled bulk transfers
usb-storage: alauda: Check whether the media is initialized
usb: typec: ucsi: Ack also failed Get Error commands
kcov, usb: disable interrupts in kcov_remote_start_usb_softirq
dt-bindings: usb: realtek,rts5411: Add missing "additionalProperties" on child nodes
usb: typec: tcpm: Ignore received Hard Reset in TOGGLING state
usb: typec: tcpm: fix use-after-free case in tcpm_register_source_caps
USB: xen-hcd: Traverse host/ when CONFIG_USB_XEN_HCD is selected
usb: typec: ucsi: glink: increase max ports for x1e80100
Revert "usb: chipidea: move ci_ulpi_init after the phy initialization"
thunderbolt: debugfs: Fix margin debugfs node creation condition
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull driver core and sysfs fixes from Greg KH:
"Here are three small changes for 6.10-rc4 that resolve reported
problems, and finally drop an unused api call. These are:
- removal of devm_device_add_groups(), all the callers of this are
finally gone after the 6.10-rc1 merge (changes came in through
different trees), so it's safe to remove.
- much reported sysfs build error fixed up for systems that did not
have sysfs enabled
- driver core sync issue fix for a many reported issue over the years
that no one really paid much attention to, until Dirk finally
tracked down the real issue and made the "obviously correct and
simple" fix for it.
All of these have been in linux-next for over a week with no reported
problems"
* tag 'driver-core-6.10-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
drivers: core: synchronize really_probe() and dev_uevent()
sysfs: Unbreak the build around sysfs_bin_attr_simple_read()
driver core: remove devm_device_add_groups()
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git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394
Pull firewire fixes from Takashi Sakamoto:
- Update tracepoints events introduced in v6.10-rc1 so that it includes
the numeric identifier of host card in which the event happens
- replace wiki URL with the current website URL in Kconfig
* tag 'firewire-fixes-6.10-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394:
firewire: core: record card index in bus_reset_handle tracepoints event
firewire: core: record card index in tracepoinrts events derived from bus_reset_arrange_template
firewire: core: record card index in async_phy_inbound tracepoints event
firewire: core: record card index in async_phy_outbound_complete tracepoints event
firewire: core: record card index in async_phy_outbound_initiate tracepoints event
firewire: core: record card index in tracepoinrts events derived from async_inbound_template
firewire: core: record card index in tracepoinrts events derived from async_outbound_initiate_template
firewire: core: record card index in tracepoinrts events derived from async_outbound_complete_template
firewire: fix website URL in Kconfig
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In kcov_remote_start()/kcov_remote_stop(), we swap the previous KCOV
metadata of the current task into a per-CPU variable. However, the
kcov_mode_enabled(mode) check is not sufficient in the case of remote KCOV
coverage: current->kcov_mode always remains KCOV_MODE_DISABLED for remote
KCOV objects.
If the original task that has invoked the KCOV_REMOTE_ENABLE ioctl happens
to get interrupted and kcov_remote_start() is called, it ultimately leads
to kcov_remote_stop() NOT restoring the original KCOV reference. So when
the task exits, all registered remote KCOV handles remain active forever.
The most uncomfortable effect (at least for syzkaller) is that the bug
prevents the reuse of the same /sys/kernel/debug/kcov descriptor. If
we obtain it in the parent process and then e.g. drop some
capabilities and continuously fork to execute individual programs, at
some point current->kcov of the forked process is lost,
kcov_task_exit() takes no action, and all KCOV_REMOTE_ENABLE ioctls
calls from subsequent forks fail.
And, yes, the efficiency is also affected if we keep on losing remote
kcov objects.
a) kcov_remote_map keeps on growing forever.
b) (If I'm not mistaken), we're also not freeing the memory referenced
by kcov->area.
Fix it by introducing a special kcov_mode that is assigned to the task
that owns a KCOV remote object. It makes kcov_mode_enabled() return true
and yet does not trigger coverage collection in __sanitizer_cov_trace_pc()
and write_comp_data().
[nogikh@google.com: replace WRITE_ONCE() with an ordinary assignment]
Link: https://lkml.kernel.org/r/20240614171221.2837584-1-nogikh@google.com
Link: https://lkml.kernel.org/r/20240611133229.527822-1-nogikh@google.com
Fixes: 5ff3b30ab57d ("kcov: collect coverage from interrupts")
Signed-off-by: Aleksandr Nogikh <nogikh@google.com>
Reviewed-by: Dmitry Vyukov <dvyukov@google.com>
Reviewed-by: Andrey Konovalov <andreyknvl@gmail.com>
Tested-by: Andrey Konovalov <andreyknvl@gmail.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Marco Elver <elver@google.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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When I did a large folios split test, a WARNING "[ 5059.122759][ T166]
Cannot split file folio to non-0 order" was triggered. But the test cases
are only for anonmous folios. while mapping_large_folio_support() is only
reasonable for page cache folios.
In split_huge_page_to_list_to_order(), the folio passed to
mapping_large_folio_support() maybe anonmous folio. The folio_test_anon()
check is missing. So the split of the anonmous THP is failed. This is
also the same for shmem_mapping(). We'd better add a check for both. But
the shmem_mapping() in __split_huge_page() is not involved, as for
anonmous folios, the end parameter is set to -1, so (head[i].index >= end)
is always false. shmem_mapping() is not called.
Also add a VM_WARN_ON_ONCE() in mapping_large_folio_support() for anon
mapping, So we can detect the wrong use more easily.
THP folios maybe exist in the pagecache even the file system doesn't
support large folio, it is because when CONFIG_TRANSPARENT_HUGEPAGE is
enabled, khugepaged will try to collapse read-only file-backed pages to
THP. But the mapping does not actually support multi order large folios
properly.
Using /sys/kernel/debug/split_huge_pages to verify this, with this patch,
large anon THP is successfully split and the warning is ceased.
Link: https://lkml.kernel.org/r/202406071740485174hcFl7jRxncsHDtI-Pz-o@zte.com.cn
Fixes: c010d47f107f ("mm: thp: split huge page to any lower order pages")
Reviewed-by: Barry Song <baohua@kernel.org>
Reviewed-by: Zi Yan <ziy@nvidia.com>
Acked-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Ran Xiaokai <ran.xiaokai@zte.com.cn>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: xu xin <xu.xin16@zte.com.cn>
Cc: Yang Yang <yang.yang29@zte.com.cn>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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put_page_tag_ref() should be called only when get_page_tag_ref() returns a
valid reference because only in that case get_page_tag_ref() enters RCU
read section while put_page_tag_ref() will call rcu_read_unlock() even if
the provided reference is NULL. Fix pgalloc_tag_get() which does not
follow this rule causing RCU imbalance. Add a warning in
put_page_tag_ref() to catch any future mistakes.
Link: https://lkml.kernel.org/r/20240601233840.617458-1-surenb@google.com
Fixes: cc92eba1c88b ("mm: fix non-compound multi-order memory accounting in __free_pages")
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Reported-by: kernel test robot <oliver.sang@intel.com>
Closes: https://lore.kernel.org/oe-lkp/202405271029.6d2f9c4c-lkp@intel.com
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Kent Overstreet <kent.overstreet@linux.dev>
Cc: Kees Cook <keescook@chromium.org>
Cc: Pasha Tatashin <pasha.tatashin@soleen.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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There was insufficient review and no agreement that this is the right
approach.
There are serious flaws with the implementation that make processes using
mlock() not even work with simple fork() [1] and we get reliable crashes
when rebooting.
Further, simply because we might be unmapping a single PTE of a large
mlocked folio, we shouldn't zero out the whole folio.
... especially because the code can also *corrupt* urelated memory because
kernel_init_pages(page, folio_nr_pages(folio));
Could end up writing outside of the actual folio if we work with a tail
page.
Let's revert it. Once there is agreement that this is the right approach,
the issues were fixed and there was reasonable review and proper testing,
we can consider it again.
[1] https://lkml.kernel.org/r/4da9da2f-73e4-45fd-b62f-a8a513314057@redhat.com
Link: https://lkml.kernel.org/r/20240605091710.38961-1-david@redhat.com
Fixes: ba42b524a040 ("mm: init_mlocked_on_free_v3")
Signed-off-by: David Hildenbrand <david@redhat.com>
Reported-by: David Wang <00107082@163.com>
Closes: https://lore.kernel.org/lkml/20240528151340.4282-1-00107082@163.com/
Reported-by: Lance Yang <ioworker0@gmail.com>
Closes: https://lkml.kernel.org/r/20240601140917.43562-1-ioworker0@gmail.com
Acked-by: Lance Yang <ioworker0@gmail.com>
Cc: York Jasper Niebuhr <yjnworkstation@gmail.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Kees Cook <keescook@chromium.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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The bus reset event occurs in the bus managed by one of 1394 OHCI
controller in Linux system, however the existing tracepoints events has
the lack of data about it to distinguish the issued hardware from the
others.
This commit adds card_index member into event structure to store the index
of host controller in use, and prints it.
Link: https://lore.kernel.org/r/20240613131440.431766-9-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
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bus_reset_arrange_template
The asynchronous transmission of phy packet is initiated on one of 1394
OHCI controller, however the existing tracepoints events has the lack of
data about it.
This commit adds card_index member into event structure to store the index
of host controller in use, and prints it.
Link: https://lore.kernel.org/r/20240613131440.431766-8-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
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The asynchronous transmission of phy packet is initiated on one of 1394
OHCI controller, however the existing tracepoints events has the lack of
data about it.
This commit adds card_index member into event structure to store the index
of host controller in use, and prints it.
Link: https://lore.kernel.org/r/20240613131440.431766-7-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
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event
The asynchronous transmission of phy packet is initiated on one of 1394
OHCI controller, however the existing tracepoints events has the lack of
data about it.
This commit adds card_index member into event structure to store the index
of host controller in use, and prints it.
Link: https://lore.kernel.org/r/20240613131440.431766-6-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
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event
The asynchronous transaction is initiated on one of 1394 OHCI
controller, however the existing tracepoints events has the lack of data
about it.
This commit adds card_index member into event structure to store the index
of host controller in use, and prints it.
Link: https://lore.kernel.org/r/20240613131440.431766-5-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
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async_inbound_template
The asynchronous transaction is initiated on one of 1394 OHCI controller,
however the existing tracepoints events has the lack of data about it.
This commit adds card_index member into event structure to store the index
of host controller in use, and prints it.
Link: https://lore.kernel.org/r/20240613131440.431766-4-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
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async_outbound_initiate_template
The asynchronous transaction is initiated on one of 1394 OHCI controller,
however the existing tracepoints events has the lack of data about it.
This commit adds card_index member into event structure to store the index
of host controller in use, and prints it.
Link: https://lore.kernel.org/r/20240613131440.431766-3-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
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async_outbound_complete_template
The asynchronous transaction is initiated on one of 1394 OHCI controller,
however the existing tracepoints events has the lack of data about it.
This commit adds card_index member into event structure to store the index
of host controller in use, and prints it.
Link: https://lore.kernel.org/r/20240613131440.431766-2-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
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Allow platform drivers to provide their logic to select an appropriate
PCS.
Tested-by: Romain Gantois <romain.gantois@bootlin.com>
Reviewed-by: Romain Gantois <romain.gantois@bootlin.com>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Link: https://lore.kernel.org/r/E1sHhoM-00Fesu-8E@rmk-PC.armlinux.org.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Calculate the pseudo-header checksum for both IPSec transport mode and
IPSec tunnel mode for mlx5 devices that do not implement a pure hardware
checksum offload for L4 checksum calculation. Introduce a capability bit
that identifies such mlx5 devices.
Signed-off-by: Rahul Rameshbabu <rrameshbabu@nvidia.com>
Reviewed-by: Gal Pressman <gal@nvidia.com>
Reviewed-by: Cosmin Ratiu <cratiu@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://lore.kernel.org/r/20240613210036.1125203-7-tariqt@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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