sctp: add SCTP_EXPOSE_POTENTIALLY_FAILED_STATE sockopt

This is a sockopt defined in section 7.3 of rfc7829: "Exposing
the Potentially Failed Path State", by which users can change
pf_expose per sock and asoc.

The new sockopt SCTP_EXPOSE_POTENTIALLY_FAILED_STATE is also
known as SCTP_EXPOSE_PF_STATE for short.

v2->v3:
  - return -EINVAL if params.assoc_value > SCTP_PF_EXPOSE_MAX.
  - define SCTP_EXPOSE_PF_STATE SCTP_EXPOSE_POTENTIALLY_FAILED_STATE.
v3->v4:
  - improve changelog.

Signed-off-by: Xin Long <lucien.xin@gmail.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Xin Long 2019-11-08 13:20:34 +08:00 committed by David S. Miller
parent 768e15182d
commit 8d2a6935d8
2 changed files with 81 additions and 0 deletions

View file

@ -137,6 +137,8 @@ typedef __s32 sctp_assoc_t;
#define SCTP_ASCONF_SUPPORTED 128
#define SCTP_AUTH_SUPPORTED 129
#define SCTP_ECN_SUPPORTED 130
#define SCTP_EXPOSE_POTENTIALLY_FAILED_STATE 131
#define SCTP_EXPOSE_PF_STATE SCTP_EXPOSE_POTENTIALLY_FAILED_STATE
/* PR-SCTP policies */
#define SCTP_PR_SCTP_NONE 0x0000