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linux/net/core
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Alexander Lobakin 13cabc47f8 netdevice: define and allocate &net_device _properly_ 
In fact, this structure contains a flexible array at the end, but
historically its size, alignment etc., is calculated manually.
There are several instances of the structure embedded into other
structures, but also there's ongoing effort to remove them and we
could in the meantime declare &net_device properly.
Declare the array explicitly, use struct_size() and store the array
size inside the structure, so that __counted_by() can be applied.
Don't use PTR_ALIGN(), as SLUB itself tries its best to ensure the
allocated buffer is aligned to what the user expects.
Also, change its alignment from %NETDEV_ALIGN to the cacheline size
as per several suggestions on the netdev ML.

bloat-o-meter for vmlinux:

free_netdev                                  445     440      -5
netdev_freemem                                24       -     -24
alloc_netdev_mqs                            1481    1450     -31

On x86_64 with several NICs of different vendors, I was never able to
get a &net_device pointer not aligned to the cacheline size after the
change.

Signed-off-by: Alexander Lobakin <aleksander.lobakin@intel.com>
Signed-off-by: Breno Leitao <leitao@debian.org>
Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@intel.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Kees Cook <kees@kernel.org>
Link: https://patch.msgid.link/20240710113036.2125584-1-leitao@debian.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
History 2024-07-11 18:11:31 -07:00
..
bpf_sk_storage.c netlink: introduce type-checking attribute iteration 2024-03-29 15:06:02 -07:00
datagram.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2024-07-11 12:58:13 -07:00
dev.c netdevice: define and allocate &net_device _properly_ 2024-07-11 18:11:31 -07:00
dev.h net: softnet_data: Make xmit per task. 2024-06-24 16:41:23 -07:00
dev_addr_lists.c net: extract a few internals from netdevice.h 2022-04-07 20:32:09 -07:00
dev_addr_lists_test.c net: dev_addr_lists: move locking out of init/exit in kunit 2024-04-15 10:26:35 +01:00
dev_ioctl.c net: Move dev_set_hwtstamp_phylib to net/core/dev.h 2024-06-17 18:25:53 -07:00
drop_monitor.c net: add rx_sk to trace_kfree_skb 2024-06-19 12:44:22 +01:00
dst.c net: dst: Make dst_destroy() static and return void. 2024-02-06 11:45:53 +01:00
dst_cache.c net: dst_cache: add two DEBUG_NET warnings 2024-06-03 18:50:09 -07:00
failover.c net: failover: use IFF_NO_ADDRCONF flag to prevent ipv6 addrconf 2022-12-12 15:18:25 -08:00
fib_notifier.c net: fib_notifier: propagate extack down to the notifier block callback 2019-10-04 11:10:56 -07:00
fib_rules.c fib: rules: no longer hold RTNL in fib_nl_dumprule() 2024-04-12 19:09:31 -07:00
filter.c bpf-next-for-netdev 2024-07-09 17:01:46 +02:00
flow_dissector.c net: ipv4: Add a sysctl to set multipath hash seed 2024-06-12 16:42:11 -07:00
flow_offload.c tc: flower: Enable offload support IPSEC SPI field. 2023-08-02 10:09:32 +01:00
gen_estimator.c net: use unrcu_pointer() helper 2024-06-06 11:52:52 +02:00
gen_stats.c net: Remove the obsolte u64_stats_fetch_*_irq() users (net). 2022-10-28 20:13:54 -07:00
gro.c net: gro: move L3 flush checks to tcp_gro_receive and udp_gro_receive_segment 2024-05-13 14:44:06 -07:00
gro_cells.c net: move netdev_max_backlog to net_hotdata 2024-03-07 21:12:42 -08:00
gso.c net: introduce struct net_hotdata 2024-03-07 21:12:41 -08:00
hotdata.c net: move sysctl_mem_pcpu_rsv to net_hotdata 2024-04-30 18:46:52 -07:00
hwbm.c net: hwbm: Make the hwbm_pool lock a mutex 2019-06-09 19:40:10 -07:00
ieee8021q_helpers.c net: add IEEE 802.1q specific helpers 2024-05-08 10:35:09 +01:00
link_watch.c net: add netdev_set_operstate() helper 2024-02-14 11:20:13 +00:00
lwt_bpf.c net: Reference bpf_redirect_info via task_struct on PREEMPT_RT. 2024-06-24 16:41:24 -07:00
lwtunnel.c xfrm: lwtunnel: squelch kernel warning in case XFRM encap type is not available 2022-10-12 10:45:51 +02:00
Makefile net: add IEEE 802.1q specific helpers 2024-05-08 10:35:09 +01:00
neighbour.c net/neighbour: constify ctl_table arguments of utility function 2024-05-28 19:49:47 -07:00
net-procfs.c net: make softnet_data.dropped an atomic_t 2024-04-01 11:28:32 +01:00
net-sysfs.c netdevice: define and allocate &net_device _properly_ 2024-07-11 18:11:31 -07:00
net-sysfs.h net-sysfs: add netdev_change_owner() 2020-02-26 20:07:25 -08:00
net-traces.c udp6: add a missing call into udp_fail_queue_rcv_skb tracepoint 2023-07-07 09:16:52 +01:00
net_namespace.c netns: Make get_net_ns() handle zero refcount net 2024-06-18 10:59:52 +02:00
net_test.c pfcp: always set pfcp metadata 2024-04-01 10:49:28 +01:00
netclassid_cgroup.c cgroup, netclassid: on modifying netclassid in cgroup, only consider the main process. 2023-10-16 16:36:53 -07:00
netdev-genl-gen.c netdev: support dumping a single netdev in qstats 2024-04-23 10:09:49 -07:00
netdev-genl-gen.h netdev: add per-queue statistics 2024-03-07 21:13:25 -08:00
netdev-genl.c netdev-genl: fix error codes when outputting XDP features 2024-06-14 18:04:29 -07:00
netevent.c net: core: Correct function name netevent_unregister_notifier() in the kerneldoc 2021-03-28 17:56:56 -07:00
netpoll.c netpoll: Fix race condition in netpoll_owner_active 2024-04-30 19:03:47 -07:00
netprio_cgroup.c bpf, cgroups: Fix cgroup v2 fallback on v1/v2 mixed mode 2021-09-13 16:35:58 -07:00
of_net.c net: Explicitly include correct DT includes 2023-07-27 20:33:16 -07:00
page_pool.c net: page_pool: fix warning code 2024-07-08 20:19:18 -07:00
page_pool_priv.h net: page_pool: report when page pool was destroyed 2023-11-28 15:48:39 +01:00
page_pool_user.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2024-03-07 10:29:36 -08:00
pktgen.c net: pktgen: Use wait_event_freezable_timeout() for freezable kthread 2023-12-27 14:34:52 +00:00
ptp_classifier.c ptp: Add generic PTP is_sync() function 2022-03-07 11:31:34 +00:00
request_sock.c tcp: make sure init the accept_queue's spinlocks once 2024-01-19 21:13:25 -08:00
rtnetlink.c net: reduce rtnetlink_rcv_msg() stack usage 2024-07-11 17:13:58 -07:00
scm.c af_unix: Add dead flag to struct scm_fp_list. 2024-05-10 18:52:45 -07:00
secure_seq.c tcp: Fix data-races around sysctl knobs related to SYN option. 2022-07-20 10:14:49 +01:00
selftests.c net: fill in MODULE_DESCRIPTION()s under net/core 2023-10-28 11:29:27 +01:00
skbuff.c page_pool: convert to use netmem 2024-07-02 18:59:33 -07:00
skmsg.c skmsg: Skip zero length skb in sk_msg_recvmsg 2024-07-09 10:24:50 +02:00
sock.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2024-06-20 13:49:59 -07:00
sock_destructor.h skb_expand_head() adjust skb->truesize incorrectly 2021-10-22 12:35:51 -07:00
sock_diag.c net: use unrcu_pointer() helper 2024-06-06 11:52:52 +02:00
sock_map.c sock_map: avoid race between sock_map_close and sk_psock_put 2024-05-28 12:05:19 +02:00
sock_reuseport.c soreuseport: Fix socket selection for SO_INCOMING_CPU. 2022-10-25 11:35:16 +02:00
stream.c net: Return error from sk_stream_wait_connect() if sk_wait_event() fails 2023-12-15 10:48:51 +00:00
sysctl_net_core.c net: make net.core.{r,w}mem_{default,max} namespaced 2024-06-01 16:03:21 -07:00
timestamping.c net: partial revert of the "Make timestamping selectable: series 2023-11-18 18:42:37 -08:00
tso.c net: tso: inline tso_count_descs() 2022-12-12 15:04:39 -08:00
utils.c net: core: inet[46]_pton strlen len types 2022-11-01 21:14:39 -07:00
xdp.c xdp: Remove WARN() from __xdp_reg_mem_model() 2024-06-24 13:44:02 +02:00