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 11/16] udp: Simplify udp_sock_handler_splice
Date: Thu, 24 Nov 2022 12:16:54 +1100 [thread overview]
Message-ID: <20221124011659.1024901-12-david@gibson.dropbear.id.au> (raw)
In-Reply-To: <20221124011659.1024901-1-david@gibson.dropbear.id.au>
Previous cleanups mean that we can now rework some complex ifs in
udp_sock_handler_splice() into a simpler set.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
---
udp.c | 47 +++++++++++++++--------------------------------
1 file changed, 15 insertions(+), 32 deletions(-)
diff --git a/udp.c b/udp.c
index 206e9d3..ec61022 100644
--- a/udp.c
+++ b/udp.c
@@ -533,50 +533,33 @@ static void udp_sock_handler_splice(const struct ctx *c, union epoll_ref ref,
}
- if (ref.r.p.udp.udp.orig && !ref.r.p.udp.udp.ns) {
- src += c->udp.fwd_out.rdelta[src];
-
- if (!(s = udp_splice_ns[v6][src].sock)) {
- struct udp_splice_new_ns_arg arg = {
- c, v6, src, -1,
- };
-
- NS_CALL(udp_splice_new_ns, &arg);
- if ((s = arg.s) < 0)
- return;
- }
-
- udp_splice_init[v6][dst].ts = now->tv_sec;
- udp_splice_ns[v6][src].ts = now->tv_sec;
- } else if (!ref.r.p.udp.udp.orig && ref.r.p.udp.udp.ns) {
+ if (ref.r.p.udp.udp.ns) {
src += c->udp.fwd_in.rdelta[src];
+ s = udp_splice_init[v6][src].sock;
+ if (!s && ref.r.p.udp.udp.orig)
+ s = udp_splice_new(c, v6, src, false);
- if (!(s = udp_splice_init[v6][src].sock))
+ if (s < 0)
return;
udp_splice_ns[v6][dst].ts = now->tv_sec;
udp_splice_init[v6][src].ts = now->tv_sec;
- } else if (ref.r.p.udp.udp.orig && ref.r.p.udp.udp.ns) {
- src += c->udp.fwd_in.rdelta[src];
-
- if (!(s = udp_splice_init[v6][src].sock)) {
- s = udp_splice_new(c, v6, src, false);
- if (s < 0)
- return;
- }
-
- udp_splice_ns[v6][dst].ts = now->tv_sec;
- udp_splice_init[v6][src].ts = now->tv_sec;
- } else if (!ref.r.p.udp.udp.orig && !ref.r.p.udp.udp.ns) {
+ } else {
src += c->udp.fwd_out.rdelta[src];
+ s = udp_splice_ns[v6][src].sock;
+ if (!s && ref.r.p.udp.udp.orig) {
+ struct udp_splice_new_ns_arg arg = {
+ c, v6, src, -1,
+ };
- if (!(s = udp_splice_ns[v6][src].sock))
+ NS_CALL(udp_splice_new_ns, &arg);
+ s = arg.s;
+ }
+ if (s < 0)
return;
udp_splice_init[v6][dst].ts = now->tv_sec;
udp_splice_ns[v6][src].ts = now->tv_sec;
- } else {
- return;
}
for (i = 0; i < n; i++) {
--
@@ -533,50 +533,33 @@ static void udp_sock_handler_splice(const struct ctx *c, union epoll_ref ref,
}
- if (ref.r.p.udp.udp.orig && !ref.r.p.udp.udp.ns) {
- src += c->udp.fwd_out.rdelta[src];
-
- if (!(s = udp_splice_ns[v6][src].sock)) {
- struct udp_splice_new_ns_arg arg = {
- c, v6, src, -1,
- };
-
- NS_CALL(udp_splice_new_ns, &arg);
- if ((s = arg.s) < 0)
- return;
- }
-
- udp_splice_init[v6][dst].ts = now->tv_sec;
- udp_splice_ns[v6][src].ts = now->tv_sec;
- } else if (!ref.r.p.udp.udp.orig && ref.r.p.udp.udp.ns) {
+ if (ref.r.p.udp.udp.ns) {
src += c->udp.fwd_in.rdelta[src];
+ s = udp_splice_init[v6][src].sock;
+ if (!s && ref.r.p.udp.udp.orig)
+ s = udp_splice_new(c, v6, src, false);
- if (!(s = udp_splice_init[v6][src].sock))
+ if (s < 0)
return;
udp_splice_ns[v6][dst].ts = now->tv_sec;
udp_splice_init[v6][src].ts = now->tv_sec;
- } else if (ref.r.p.udp.udp.orig && ref.r.p.udp.udp.ns) {
- src += c->udp.fwd_in.rdelta[src];
-
- if (!(s = udp_splice_init[v6][src].sock)) {
- s = udp_splice_new(c, v6, src, false);
- if (s < 0)
- return;
- }
-
- udp_splice_ns[v6][dst].ts = now->tv_sec;
- udp_splice_init[v6][src].ts = now->tv_sec;
- } else if (!ref.r.p.udp.udp.orig && !ref.r.p.udp.udp.ns) {
+ } else {
src += c->udp.fwd_out.rdelta[src];
+ s = udp_splice_ns[v6][src].sock;
+ if (!s && ref.r.p.udp.udp.orig) {
+ struct udp_splice_new_ns_arg arg = {
+ c, v6, src, -1,
+ };
- if (!(s = udp_splice_ns[v6][src].sock))
+ NS_CALL(udp_splice_new_ns, &arg);
+ s = arg.s;
+ }
+ if (s < 0)
return;
udp_splice_init[v6][dst].ts = now->tv_sec;
udp_splice_ns[v6][src].ts = now->tv_sec;
- } else {
- return;
}
for (i = 0; i < n; i++) {
--
2.38.1
next prev parent reply other threads:[~2022-11-24 1:17 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-24 1:16 [PATCH v2 00/16] Simplify and correct handling of "spliced" UDP forwarding David Gibson
2022-11-24 1:16 ` [PATCH v2 01/16] udp: Also bind() connected ports for "splice" forwarding David Gibson
2022-11-25 1:47 ` Stefano Brivio
2022-11-25 7:01 ` David Gibson
2022-11-24 1:16 ` [PATCH v2 02/16] udp: Separate tracking of inbound and outbound packet flows David Gibson
2022-11-25 1:47 ` Stefano Brivio
2022-11-25 7:06 ` David Gibson
2022-11-24 1:16 ` [PATCH v2 03/16] udp: Always use sendto() rather than send() for forwarding spliced packets David Gibson
2022-11-24 1:16 ` [PATCH v2 04/16] udp: Don't connect "forward" sockets for spliced flows David Gibson
2022-11-25 1:47 ` Stefano Brivio
2022-11-25 7:07 ` David Gibson
2022-12-01 18:49 ` Stefano Brivio
2022-11-24 1:16 ` [PATCH v2 05/16] udp: Remove the @bound field from union udp_epoll_ref David Gibson
2022-11-24 1:16 ` [PATCH v2 06/16] udp: Split splice field in udp_epoll_ref into (mostly) independent bits David Gibson
2022-11-24 1:16 ` [PATCH v2 07/16] udp: Don't create double sockets for -U port David Gibson
2022-11-24 1:16 ` [PATCH v2 08/16] udp: Re-use fixed bound sockets for packet forwarding when possible David Gibson
2022-11-24 1:16 ` [PATCH v2 09/16] udp: Don't explicitly track originating socket for spliced "connections" David Gibson
2022-11-25 1:48 ` Stefano Brivio
2022-11-25 7:09 ` David Gibson
2022-11-24 1:16 ` [PATCH v2 10/16] udp: Update UDP "connection" timestamps in both directions David Gibson
2022-11-24 1:16 ` David Gibson [this message]
2022-11-24 1:16 ` [PATCH v2 12/16] udp: Make UDP_SPLICE_FRAMES and UDP_TAP_FRAMES_MEM the same thing David Gibson
2022-11-24 1:16 ` [PATCH v2 13/16] udp: Add helper to extract port from a sockaddr_in or sockaddr_in6 David Gibson
2022-11-25 1:48 ` Stefano Brivio
2022-11-25 7:10 ` David Gibson
2022-11-24 1:16 ` [PATCH v2 14/16] udp: Unify buffers for tap and splice paths David Gibson
2022-11-24 1:16 ` [PATCH v2 15/16] udp: Split send half of udp_sock_handler_splice() from the receive half David Gibson
2022-11-24 1:16 ` [PATCH v2 16/16] udp: Correct splice forwarding when receiving from multiple sources David Gibson
2022-11-29 5:55 ` David Gibson
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