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linux/net/tls
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Benjamin Coddington 6d6ce5f75d tls: Fix tls_sw_sendmsg error handling 
[ Upstream commit b341ca51d2 ]

We've noticed that NFS can hang when using RPC over TLS on an unstable
connection, and investigation shows that the RPC layer is stuck in a tight
loop attempting to transmit, but forever getting -EBADMSG back from the
underlying network.  The loop begins when tcp_sendmsg_locked() returns
-EPIPE to tls_tx_records(), but that error is converted to -EBADMSG when
calling the socket's error reporting handler.

Instead of converting errors from tcp_sendmsg_locked(), let's pass them
along in this path.  The RPC layer handles -EPIPE by reconnecting the
transport, which prevents the endless attempts to transmit on a broken
connection.

Signed-off-by: Benjamin Coddington <bcodding@redhat.com>
Fixes: a42055e8d2 ("net/tls: Add support for async encryption of records for performance")
Link: https://patch.msgid.link/9594185559881679d81f071b181a10eb07cd079f.1736004079.git.bcodding@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2025-01-23 17:15:50 +01:00
..
Kconfig net/tls: Select SOCK_RX_QUEUE_MAPPING from TLS_DEVICE 2021-02-11 19:08:06 -08:00
Makefile net/tls: add skeleton of MIB statistics 2019-10-05 16:29:00 -07:00
tls_device.c tls: hw: rx: use return value of tls_device_decrypted() to carry status 2024-03-06 14:38:47 +00:00
tls_device_fallback.c net/tls: Fix use-after-free after the TLS device goes down and up 2021-06-01 15:58:05 -07:00
tls_main.c tls: fix missing memory barrier in tls_init 2024-06-16 13:39:48 +02:00
tls_proc.c net: fix proc_fs init handling in af_packet and tls 2020-12-14 19:39:30 -08:00
tls_sw.c tls: Fix tls_sw_sendmsg error handling 2025-01-23 17:15:50 +01:00
tls_toe.c net/tls: rename tls_hw_* functions tls_toe_* 2019-10-04 14:07:07 -07:00
trace.c net/tls: add tracing for device/offload events 2019-10-05 16:29:00 -07:00
trace.h net/tls: add device decrypted trace point 2019-10-05 16:29:00 -07:00