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linux/net/xfrm
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Liu Jian 4f4920669d xfrm: Reinject transport-mode packets through workqueue 
The following warning is displayed when the tcp6-multi-diffip11 stress
test case of the LTP test suite is tested:

watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [ns-tcpserver:48198]
CPU: 0 PID: 48198 Comm: ns-tcpserver Kdump: loaded Not tainted 6.0.0-rc6+ #39
Hardware name: QEMU KVM Virtual Machine, BIOS 0.0.0 02/06/2015
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : des3_ede_encrypt+0x27c/0x460 [libdes]
lr : 0x3f
sp : ffff80000ceaa1b0
x29: ffff80000ceaa1b0 x28: ffff0000df056100 x27: ffff0000e51e5280
x26: ffff80004df75030 x25: ffff0000e51e4600 x24: 000000000000003b
x23: 0000000000802080 x22: 000000000000003d x21: 0000000000000038
x20: 0000000080000020 x19: 000000000000000a x18: 0000000000000033
x17: ffff0000e51e4780 x16: ffff80004e2d1448 x15: ffff80004e2d1248
x14: ffff0000e51e4680 x13: ffff80004e2d1348 x12: ffff80004e2d1548
x11: ffff80004e2d1848 x10: ffff80004e2d1648 x9 : ffff80004e2d1748
x8 : ffff80004e2d1948 x7 : 000000000bcaf83d x6 : 000000000000001b
x5 : ffff80004e2d1048 x4 : 00000000761bf3bf x3 : 000000007f1dd0a3
x2 : ffff0000e51e4780 x1 : ffff0000e3b9a2f8 x0 : 00000000db44e872
Call trace:
 des3_ede_encrypt+0x27c/0x460 [libdes]
 crypto_des3_ede_encrypt+0x1c/0x30 [des_generic]
 crypto_cbc_encrypt+0x148/0x190
 crypto_skcipher_encrypt+0x2c/0x40
 crypto_authenc_encrypt+0xc8/0xfc [authenc]
 crypto_aead_encrypt+0x2c/0x40
 echainiv_encrypt+0x144/0x1a0 [echainiv]
 crypto_aead_encrypt+0x2c/0x40
 esp6_output_tail+0x1c8/0x5d0 [esp6]
 esp6_output+0x120/0x278 [esp6]
 xfrm_output_one+0x458/0x4ec
 xfrm_output_resume+0x6c/0x1f0
 xfrm_output+0xac/0x4ac
 __xfrm6_output+0x130/0x270
 xfrm6_output+0x60/0xec
 ip6_xmit+0x2ec/0x5bc
 inet6_csk_xmit+0xbc/0x10c
 __tcp_transmit_skb+0x460/0x8c0
 tcp_write_xmit+0x348/0x890
 __tcp_push_pending_frames+0x44/0x110
 tcp_rcv_established+0x3c8/0x720
 tcp_v6_do_rcv+0xdc/0x4a0
 tcp_v6_rcv+0xc24/0xcb0
 ip6_protocol_deliver_rcu+0xf0/0x574
 ip6_input_finish+0x48/0x7c
 ip6_input+0x48/0xc0
 ip6_rcv_finish+0x80/0x9c
 xfrm_trans_reinject+0xb0/0xf4
 tasklet_action_common.constprop.0+0xf8/0x134
 tasklet_action+0x30/0x3c
 __do_softirq+0x128/0x368
 do_softirq+0xb4/0xc0
 __local_bh_enable_ip+0xb0/0xb4
 put_cpu_fpsimd_context+0x40/0x70
 kernel_neon_end+0x20/0x40
 sha1_base_do_update.constprop.0.isra.0+0x11c/0x140 [sha1_ce]
 sha1_ce_finup+0x94/0x110 [sha1_ce]
 crypto_shash_finup+0x34/0xc0
 hmac_finup+0x48/0xe0
 crypto_shash_finup+0x34/0xc0
 shash_digest_unaligned+0x74/0x90
 crypto_shash_digest+0x4c/0x9c
 shash_ahash_digest+0xc8/0xf0
 shash_async_digest+0x28/0x34
 crypto_ahash_digest+0x48/0xcc
 crypto_authenc_genicv+0x88/0xcc [authenc]
 crypto_authenc_encrypt+0xd8/0xfc [authenc]
 crypto_aead_encrypt+0x2c/0x40
 echainiv_encrypt+0x144/0x1a0 [echainiv]
 crypto_aead_encrypt+0x2c/0x40
 esp6_output_tail+0x1c8/0x5d0 [esp6]
 esp6_output+0x120/0x278 [esp6]
 xfrm_output_one+0x458/0x4ec
 xfrm_output_resume+0x6c/0x1f0
 xfrm_output+0xac/0x4ac
 __xfrm6_output+0x130/0x270
 xfrm6_output+0x60/0xec
 ip6_xmit+0x2ec/0x5bc
 inet6_csk_xmit+0xbc/0x10c
 __tcp_transmit_skb+0x460/0x8c0
 tcp_write_xmit+0x348/0x890
 __tcp_push_pending_frames+0x44/0x110
 tcp_push+0xb4/0x14c
 tcp_sendmsg_locked+0x71c/0xb64
 tcp_sendmsg+0x40/0x6c
 inet6_sendmsg+0x4c/0x80
 sock_sendmsg+0x5c/0x6c
 __sys_sendto+0x128/0x15c
 __arm64_sys_sendto+0x30/0x40
 invoke_syscall+0x50/0x120
 el0_svc_common.constprop.0+0x170/0x194
 do_el0_svc+0x38/0x4c
 el0_svc+0x28/0xe0
 el0t_64_sync_handler+0xbc/0x13c
 el0t_64_sync+0x180/0x184

Get softirq info by bcc tool:
./softirqs -NT 10
Tracing soft irq event time... Hit Ctrl-C to end.

15:34:34
SOFTIRQ          TOTAL_nsecs
block                 158990
timer               20030920
sched               46577080
net_rx             676746820
tasklet           9906067650

15:34:45
SOFTIRQ          TOTAL_nsecs
block                  86100
sched               38849790
net_rx             676532470
timer             1163848790
tasklet           9409019620

15:34:55
SOFTIRQ          TOTAL_nsecs
sched               58078450
net_rx             475156720
timer              533832410
tasklet           9431333300

The tasklet software interrupt takes too much time. Therefore, the
xfrm_trans_reinject executor is changed from tasklet to workqueue. Add add
spin lock to protect the queue. This reduces the processing flow of the
tcp_sendmsg function in this scenario.

Fixes: acf568ee85 ("xfrm: Reinject transport-mode packets through tasklet")
Signed-off-by: Liu Jian <liujian56@huawei.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
2022-09-28 09:04:12 +02:00
..
espintcp.c net: Fix data-races around netdev_max_backlog. 2022-08-24 13:46:57 +01:00
Kconfig xfrm/compat: Add 32=>64-bit messages translator 2020-09-24 08:53:03 +02:00
Makefile xfrm: Provide API to register translator module 2020-09-24 08:53:03 +02:00
xfrm_algo.c xfrm: Add support for SM4 symmetric cipher algorithm 2021-12-23 09:32:51 +01:00
xfrm_compat.c xfrm: rate limit SA mapping change message to user space 2021-12-23 09:32:51 +01:00
xfrm_device.c net: rename reference+tracking helpers 2022-06-09 21:52:55 -07:00
xfrm_hash.c mm: remove include/linux/bootmem.h 2018-10-31 08:54:16 -07:00
xfrm_hash.h xfrm: add state hashtable keyed by seq 2021-05-14 13:52:01 +02:00
xfrm_inout.h xfrm: move xfrm4_extract_header to common helper 2020-05-06 09:40:08 +02:00
xfrm_input.c xfrm: Reinject transport-mode packets through workqueue 2022-09-28 09:04:12 +02:00
xfrm_interface.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2022-03-10 17:16:56 -08:00
xfrm_ipcomp.c xfrm: Update ipcomp_scratches with NULL when freed 2022-09-01 10:22:47 +02:00
xfrm_output.c Revert "xfrm: update SA curlft.use_time" 2022-08-03 07:27:37 +02:00
xfrm_policy.c xfrm: policy: fix metadata dst->dev xmit null pointer dereference 2022-08-17 11:06:37 +02:00
xfrm_proc.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
xfrm_replay.c xfrm: replay: remove last replay indirection 2021-06-21 09:55:06 +02:00
xfrm_state.c Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec 2022-08-24 12:51:50 +01:00
xfrm_sysctl.c
xfrm_user.c xfrm: change the type of xfrm_register_km and xfrm_unregister_km 2022-06-24 10:19:11 +02:00