From: David Gibson <david@gibson.dropbear.id.au>
To: passt-dev@passt.top, Stefano Brivio <sbrivio@redhat.com>
Cc: David Gibson <david@gibson.dropbear.id.au>
Subject: [PATCH v2 08/22] flow: Add helper to determine a flow's protocol
Date: Tue, 6 Feb 2024 12:17:20 +1100 [thread overview]
Message-ID: <20240206011734.884138-9-david@gibson.dropbear.id.au> (raw)
In-Reply-To: <20240206011734.884138-1-david@gibson.dropbear.id.au>
Each flow already has a type field. This implies the protocol the flow
represents, but also has more information: we have two ways to represent
TCP flows, "tap" and "spliced". In order to generalise some of the flow
mechanics, we'll need to determine a flow's protocol in terms of the IP
(L4) protocol number.
Introduce a constant table and helper macro to derive this from the flow
type.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
---
flow.c | 7 +++++++
flow.h | 4 ++++
2 files changed, 11 insertions(+)
diff --git a/flow.c b/flow.c
index 5e94a7a9..beb9749c 100644
--- a/flow.c
+++ b/flow.c
@@ -25,6 +25,13 @@ const char *flow_type_str[] = {
static_assert(ARRAY_SIZE(flow_type_str) == FLOW_NUM_TYPES,
"flow_type_str[] doesn't match enum flow_type");
+const uint8_t flow_proto[] = {
+ [FLOW_TCP] = IPPROTO_TCP,
+ [FLOW_TCP_SPLICE] = IPPROTO_TCP,
+};
+static_assert(ARRAY_SIZE(flow_proto) == FLOW_NUM_TYPES,
+ "flow_proto[] doesn't match enum flow_type");
+
/* Global Flow Table */
/**
diff --git a/flow.h b/flow.h
index 48a0ab4b..e9b3ce3e 100644
--- a/flow.h
+++ b/flow.h
@@ -27,6 +27,10 @@ extern const char *flow_type_str[];
#define FLOW_TYPE(f) \
((f)->type < FLOW_NUM_TYPES ? flow_type_str[(f)->type] : "?")
+extern const uint8_t flow_proto[];
+#define FLOW_PROTO(f) \
+ ((f)->type < FLOW_NUM_TYPES ? flow_proto[(f)->type] : 0)
+
/**
* struct flow_common - Common fields for packet flows
* @type: Type of packet flow
--
@@ -27,6 +27,10 @@ extern const char *flow_type_str[];
#define FLOW_TYPE(f) \
((f)->type < FLOW_NUM_TYPES ? flow_type_str[(f)->type] : "?")
+extern const uint8_t flow_proto[];
+#define FLOW_PROTO(f) \
+ ((f)->type < FLOW_NUM_TYPES ? flow_proto[(f)->type] : 0)
+
/**
* struct flow_common - Common fields for packet flows
* @type: Type of packet flow
--
2.43.0
next prev parent reply other threads:[~2024-02-06 1:17 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-06 1:17 [PATCH v2 00/22] More flow table preliminaries: address handling improvements David Gibson
2024-02-06 1:17 ` [PATCH v2 01/22] treewide: Use sa_family_t for address family variables David Gibson
2024-02-06 1:17 ` [PATCH v2 02/22] inany: Helper to test for various address types David Gibson
2024-02-18 20:58 ` Stefano Brivio
2024-02-19 1:48 ` David Gibson
2024-02-06 1:17 ` [PATCH v2 03/22] inany: Add inany_ntop() helper David Gibson
2024-02-06 1:17 ` [PATCH v2 04/22] inany: Provide more conveniently typed constants for special addresses David Gibson
2024-02-06 1:17 ` [PATCH v2 05/22] inany: Introduce union sockaddr_inany David Gibson
2024-02-06 1:17 ` [PATCH v2 06/22] util: Allow IN4_IS_* macros to operate on untyped addresses David Gibson
2024-02-06 1:17 ` [PATCH v2 07/22] tcp, udp: Don't precompute port remappings in epoll references David Gibson
2024-02-06 1:17 ` David Gibson [this message]
2024-02-06 1:17 ` [PATCH v2 09/22] tcp_splice: Simplify clean up logic David Gibson
2024-02-18 20:59 ` Stefano Brivio
2024-02-19 1:50 ` David Gibson
2024-02-06 1:17 ` [PATCH v2 10/22] tcp_splice: Don't use flow_trace() before setting flow type David Gibson
2024-02-06 1:17 ` [PATCH v2 11/22] flow: Clarify flow entry life cycle, introduce uniform logging David Gibson
2024-02-18 21:00 ` Stefano Brivio
2024-02-19 1:58 ` David Gibson
2024-02-06 1:17 ` [PATCH v2 12/22] tcp, tcp_splice: Helpers for getting sockets from the pools David Gibson
2024-02-18 21:00 ` Stefano Brivio
2024-02-19 1:51 ` David Gibson
2024-02-06 1:17 ` [PATCH v2 13/22] tcp_splice: More specific variable names in new splice path David Gibson
2024-02-18 21:00 ` Stefano Brivio
2024-02-19 1:53 ` David Gibson
2024-02-06 1:17 ` [PATCH v2 14/22] tcp_splice: Merge tcp_splice_new() into its caller David Gibson
2024-02-06 1:17 ` [PATCH v2 15/22] tcp_splice: Make tcp_splice_connect() create its own sockets David Gibson
2024-02-06 1:17 ` [PATCH v2 16/22] tcp_splice: Improve error reporting on connect path David Gibson
2024-02-18 21:01 ` Stefano Brivio
2024-02-19 3:23 ` David Gibson
2024-02-06 1:17 ` [PATCH v2 17/22] tcp_splice: Improve logic deciding when to splice David Gibson
2024-02-06 1:17 ` [PATCH v2 18/22] tcp, tcp_splice: Parse listening socket epoll ref in tcp_listen_handler() David Gibson
2024-02-06 1:17 ` [PATCH v2 19/22] tcp: Validate TCP endpoint addresses David Gibson
2024-02-22 12:45 ` Stefano Brivio
2024-02-23 3:56 ` David Gibson
2024-02-06 1:17 ` [PATCH v2 20/22] tap: Disallow loopback addresses on tap interface David Gibson
2024-02-06 1:17 ` [PATCH v2 21/22] port_fwd: Fix copypasta error in port_fwd_scan_udp() comments David Gibson
2024-02-06 1:17 ` [PATCH v2 22/22] fwd: Rename port_fwd.[ch] and their contents David Gibson
2024-02-27 14:22 ` [PATCH v2 00/22] More flow table preliminaries: address handling improvements Stefano Brivio
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