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cxgbe(4): Updates to the drop features from r366532.

Browse Source 
MFC after:	1 week
Sponsored by:	Chelsio Communications
This commit is contained in:
Navdeep Parhar 2020-10-19 21:11:49 +00:00
parent 2c19e8ed90
commit ae5da4e14d
2 changed files with 6 additions and 3 deletions
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7
share/man/man4/cxgbe.4
View File

@ -31,7 +31,7 @@
.\"
.\" $FreeBSD$
.\"
.Dd October 8, 2020
.Dd October 19, 2020
.Dt CXGBE 4
.Os
.Sh NAME
@ -369,6 +369,7 @@ The attack filter will drop an incoming frame if any of these conditions is
true: src ip/ip6 == dst ip/ip6; tcp and src/dst ip is not unicast; src/dst ip is
loopback (127.x.y.z); src ip6 is not unicast; src/dst ip6 is loopback (::1/128)
or unspecified (::/128); tcp and src/dst ip6 is mcast (ff00::/8).
This facility is available on T4 and T5 based cards only.
.It Va hw.cxgbe.drop_ip_fragments
Set to 1 to drop all incoming IP fragments.
Default is 0.
@ -378,9 +379,11 @@ Set to 1 to drop incoming frames with Layer 2 length or checksum errors.
Default is 1.
.It Va hw.cxgbe.drop_pkts_with_l3_errors
Set to 1 to drop incoming frames with IP version, length, or checksum errors.
The IP checksum is validated for TCP or UDP packets only.
Default is 0.
.It Va hw.cxgbe.drop_pkts_with_l4_errors
Set to 1 to drop incoming frames with Layer 4 length, checksum, or other errors.
Set to 1 to drop incoming frames with Layer 4 (TCP or UDP) length,
checksum, or other errors.
Default is 0.
.El
.Sh SUPPORT

2
sys/dev/cxgbe/t4_main.c
View File

@ -4823,7 +4823,7 @@ set_params__post_init(struct adapter *sc)
F_DROPERRORIPHDRLEN | F_DROPERRORTCPHDRLEN | F_DROPERRORPKTLEN |
F_DROPERRORTCPOPT | F_DROPERRORCSUMIP | F_DROPERRORCSUM;
val = 0;
if (t4_attack_filter != 0) {
if (chip_id(sc) < CHELSIO_T6 && t4_attack_filter != 0) {
t4_set_reg_field(sc, A_TP_GLOBAL_CONFIG, F_ATTACKFILTERENABLE,
F_ATTACKFILTERENABLE);
val |= F_DROPERRORATTACK;