From: David Gibson <david@gibson.dropbear.id.au>
To: Stefano Brivio <sbrivio@redhat.com>, passt-dev@passt.top
Cc: David Gibson <david@gibson.dropbear.id.au>
Subject: [PATCH v4 11/16] udp: Simplify udp_sock_handler_splice
Date: Wed, 30 Nov 2022 15:13:11 +1100 [thread overview]
Message-ID: <20221130041316.2539575-12-david@gibson.dropbear.id.au> (raw)
In-Reply-To: <20221130041316.2539575-1-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 d835a89..25a37c6 100644
--- a/udp.c
+++ b/udp.c
@@ -532,50 +532,33 @@ 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++) {
--
@@ -532,50 +532,33 @@ 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:[~2022-11-30 4:13 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-30 4:13 [PATCH v4 00/16] Simplify and correct handling of "spliced" UDP forwarding David Gibson
2022-11-30 4:13 ` [PATCH v4 01/16] udp: Also bind() connected ports for "splice" forwarding David Gibson
2022-11-30 4:13 ` [PATCH v4 02/16] udp: Separate tracking of inbound and outbound packet flows David Gibson
2022-11-30 4:13 ` [PATCH v4 03/16] udp: Always use sendto() rather than send() for forwarding spliced packets David Gibson
2022-11-30 4:13 ` [PATCH v4 04/16] udp: Don't connect "forward" sockets for spliced flows David Gibson
2022-11-30 4:13 ` [PATCH v4 05/16] udp: Remove the @bound field from union udp_epoll_ref David Gibson
2022-11-30 4:13 ` [PATCH v4 06/16] udp: Split splice field in udp_epoll_ref into (mostly) independent bits David Gibson
2022-11-30 4:13 ` [PATCH v4 07/16] udp: Don't create double sockets for -U port David Gibson
2022-11-30 4:13 ` [PATCH v4 08/16] udp: Re-use fixed bound sockets for packet forwarding when possible David Gibson
2022-11-30 4:13 ` [PATCH v4 09/16] udp: Don't explicitly track originating socket for spliced "connections" David Gibson
2022-11-30 4:13 ` [PATCH v4 10/16] udp: Update UDP "connection" timestamps in both directions David Gibson
2022-11-30 4:13 ` David Gibson [this message]
2022-11-30 4:13 ` [PATCH v4 12/16] udp: Make UDP_SPLICE_FRAMES and UDP_TAP_FRAMES_MEM the same thing David Gibson
2022-11-30 4:13 ` [PATCH v4 13/16] udp: Add helper to extract port from a sockaddr_in or sockaddr_in6 David Gibson
2022-11-30 4:13 ` [PATCH v4 14/16] udp: Unify buffers for tap and splice paths David Gibson
2022-11-30 4:13 ` [PATCH v4 15/16] udp: Split send half of udp_sock_handler_splice() from the receive half David Gibson
2022-11-30 4:13 ` [PATCH v4 16/16] udp: Correct splice forwarding when receiving from multiple sources David Gibson
2022-12-06 6:45 ` [PATCH v4 00/16] Simplify and correct handling of "spliced" UDP forwarding Stefano Brivio
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20221130041316.2539575-12-david@gibson.dropbear.id.au \
--to=david@gibson.dropbear.id.au \
--cc=passt-dev@passt.top \
--cc=sbrivio@redhat.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
Code repositories for project(s) associated with this public inbox
https://passt.top/passt
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for IMAP folder(s).