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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Shuah Khan , netdev@vger.kernel.org, lvs-devel@vger.kernel.org, netfilter-devel@vger.kernel.org, Adriano Cordova Subject: [PATCH v2 1/4] ipvs: add flags for per-service secure TCP state table Date: Tue, 15 Sep 2026 19:41:01 -0300 Message-ID: <20260915224104.639985-2-adrianox@gmail.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260915224104.639985-1-adrianox@gmail.com> References: <20260915224104.639985-1-adrianox@gmail.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Add IP_VS_SVC_F_SECURE_TCP to mark a virtual service for the DoS-hardened TCP connection state table, and IP_VS_CONN_F_SECURE_TCP to carry that capability on a connection so the TCP state machine can select the hardened table for it. The service flag is 0x0100: bits 0x0008/0x0010/0x0020 are the scheduler bits, so leave 0x0040/0x0080 free for schedulers. Signed-off-by: Adriano Cordova --- Changes in v2: - Let IP_VS_SVC_F_SECURE_TCP be 0x0100, leaving 0x0040/0x0080 free for scheduler flags. - Let IP_VS_CONN_F_SECURE_TCP be (1 << 17) and drop it from IP_VS_CONN_F_BACKUP_MASK. include/uapi/linux/ip_vs.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/include/uapi/linux/ip_vs.h b/include/uapi/linux/ip_vs.h index 2c37c6ac7525..ade170109ff4 100644 --- a/include/uapi/linux/ip_vs.h +++ b/include/uapi/linux/ip_vs.h @@ -27,6 +27,7 @@ #define IP_VS_SVC_F_SCHED_SH_FALLBACK IP_VS_SVC_F_SCHED1 /* SH fallback */ #define IP_VS_SVC_F_SCHED_SH_PORT IP_VS_SVC_F_SCHED2 /* SH use port */ +#define IP_VS_SVC_F_SECURE_TCP 0x0100 /* use the hardened TCP table */ /* * IPVS sync daemon states @@ -105,6 +106,7 @@ /* Flags that are not sent to backup server start from bit 16 */ #define IP_VS_CONN_F_NFCT (1 << 16) /* use netfilter conntrack */ +#define IP_VS_CONN_F_SECURE_TCP (1 << 17) /* use the hardened TCP table */ /* Connection flags from destination that can be changed by user space */ #define IP_VS_CONN_F_DEST_MASK (IP_VS_CONN_F_FWD_MASK | \ -- 2.51.0