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 3/9] epoll: Fold sock_handler into general switch on epoll event fd
Date: Mon, 7 Aug 2023 23:46:25 +1000 [thread overview]
Message-ID: <20230807134631.1400119-4-david@gibson.dropbear.id.au> (raw)
In-Reply-To: <20230807134631.1400119-1-david@gibson.dropbear.id.au>
When we process events from epoll_wait(), we check for a number of special
cases before calling sock_handler() which then dispatches based on the
protocol type of the socket in the event.
Fold these cases together into a single switch on the fd type recorded in
the epoll data field.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
---
passt.c | 54 +++++++++++++++++++++++++++---------------------------
1 file changed, 27 insertions(+), 27 deletions(-)
diff --git a/passt.c b/passt.c
index 195fccf..32ea2ca 100644
--- a/passt.c
+++ b/passt.c
@@ -64,29 +64,6 @@ char *epoll_type_str[EPOLL_TYPE_MAX+1] = {
[EPOLL_TYPE_TAP] = "tap device",
};
-/**
- * sock_handler() - Event handler for L4 sockets
- * @c: Execution context
- * @ref: epoll reference
- * @events: epoll events
- * @now: Current timestamp
- */
-static void sock_handler(struct ctx *c, union epoll_ref ref,
- uint32_t events, const struct timespec *now)
-{
- trace("%s: packet from %s %i (events: 0x%08x)",
- c->mode == MODE_PASST ? "passt" : "pasta",
- EPOLL_TYPE_STR(ref.type), ref.fd, events);
-
- if (!c->no_tcp && ref.type == EPOLL_TYPE_TCP)
- tcp_sock_handler(c, ref, events, now);
- else if (!c->no_udp && ref.type == EPOLL_TYPE_UDP)
- udp_sock_handler(c, ref, events, now);
- else if (!c->no_icmp &&
- (ref.type == EPOLL_TYPE_ICMP || ref.type == EPOLL_TYPE_ICMPV6))
- icmp_sock_handler(c, ref, events, now);
-}
-
/**
* post_handler() - Run periodic and deferred tasks for L4 protocol handlers
* @c: Execution context
@@ -330,13 +307,36 @@ loop:
for (i = 0; i < nfds; i++) {
union epoll_ref ref = *((union epoll_ref *)&events[i].data.u64);
+ uint32_t eventmask = events[i].events;
- if (ref.type == EPOLL_TYPE_TAP)
+ trace("%s: epoll event on %s %i (events: 0x%08x)",
+ c.mode == MODE_PASST ? "passt" : "pasta",
+ EPOLL_TYPE_STR(ref.type), ref.fd, events);
+
+ switch (ref.type) {
+ case EPOLL_TYPE_TAP:
tap_handler(&c, ref.fd, events[i].events, &now);
- else if (ref.type == EPOLL_TYPE_NSQUIT)
+ break;
+ case EPOLL_TYPE_NSQUIT:
pasta_netns_quit_handler(&c, quit_fd);
- else
- sock_handler(&c, ref, events[i].events, &now);
+ break;
+ case EPOLL_TYPE_TCP:
+ if (!c.no_tcp)
+ tcp_sock_handler(&c, ref, eventmask, &now);
+ break;
+ case EPOLL_TYPE_UDP:
+ if (!c.no_udp)
+ udp_sock_handler(&c, ref, eventmask, &now);
+ break;
+ case EPOLL_TYPE_ICMP:
+ case EPOLL_TYPE_ICMPV6:
+ if (!c.no_icmp)
+ icmp_sock_handler(&c, ref, eventmask, &now);
+ break;
+ default:
+ /* Can't happen */
+ ASSERT(0);
+ }
}
post_handler(&c, &now);
--
@@ -64,29 +64,6 @@ char *epoll_type_str[EPOLL_TYPE_MAX+1] = {
[EPOLL_TYPE_TAP] = "tap device",
};
-/**
- * sock_handler() - Event handler for L4 sockets
- * @c: Execution context
- * @ref: epoll reference
- * @events: epoll events
- * @now: Current timestamp
- */
-static void sock_handler(struct ctx *c, union epoll_ref ref,
- uint32_t events, const struct timespec *now)
-{
- trace("%s: packet from %s %i (events: 0x%08x)",
- c->mode == MODE_PASST ? "passt" : "pasta",
- EPOLL_TYPE_STR(ref.type), ref.fd, events);
-
- if (!c->no_tcp && ref.type == EPOLL_TYPE_TCP)
- tcp_sock_handler(c, ref, events, now);
- else if (!c->no_udp && ref.type == EPOLL_TYPE_UDP)
- udp_sock_handler(c, ref, events, now);
- else if (!c->no_icmp &&
- (ref.type == EPOLL_TYPE_ICMP || ref.type == EPOLL_TYPE_ICMPV6))
- icmp_sock_handler(c, ref, events, now);
-}
-
/**
* post_handler() - Run periodic and deferred tasks for L4 protocol handlers
* @c: Execution context
@@ -330,13 +307,36 @@ loop:
for (i = 0; i < nfds; i++) {
union epoll_ref ref = *((union epoll_ref *)&events[i].data.u64);
+ uint32_t eventmask = events[i].events;
- if (ref.type == EPOLL_TYPE_TAP)
+ trace("%s: epoll event on %s %i (events: 0x%08x)",
+ c.mode == MODE_PASST ? "passt" : "pasta",
+ EPOLL_TYPE_STR(ref.type), ref.fd, events);
+
+ switch (ref.type) {
+ case EPOLL_TYPE_TAP:
tap_handler(&c, ref.fd, events[i].events, &now);
- else if (ref.type == EPOLL_TYPE_NSQUIT)
+ break;
+ case EPOLL_TYPE_NSQUIT:
pasta_netns_quit_handler(&c, quit_fd);
- else
- sock_handler(&c, ref, events[i].events, &now);
+ break;
+ case EPOLL_TYPE_TCP:
+ if (!c.no_tcp)
+ tcp_sock_handler(&c, ref, eventmask, &now);
+ break;
+ case EPOLL_TYPE_UDP:
+ if (!c.no_udp)
+ udp_sock_handler(&c, ref, eventmask, &now);
+ break;
+ case EPOLL_TYPE_ICMP:
+ case EPOLL_TYPE_ICMPV6:
+ if (!c.no_icmp)
+ icmp_sock_handler(&c, ref, eventmask, &now);
+ break;
+ default:
+ /* Can't happen */
+ ASSERT(0);
+ }
}
post_handler(&c, &now);
--
2.41.0
next prev parent reply other threads:[~2023-08-07 13:46 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-08-07 13:46 [PATCH 0/9] Clean up to epoll dispatch David Gibson
2023-08-07 13:46 ` [PATCH 1/9] epoll: Generalize epoll_ref to cover things other than sockets David Gibson
2023-08-09 19:59 ` Stefano Brivio
2023-08-10 0:23 ` David Gibson
2023-08-07 13:46 ` [PATCH 2/9] epoll: Always use epoll_ref for the epoll data variable David Gibson
2023-08-07 13:46 ` David Gibson [this message]
2023-08-07 13:46 ` [PATCH 4/9] epoll: Split handling of ICMP and ICMPv6 sockets David Gibson
2023-08-07 13:46 ` [PATCH 5/9] epoll: Tiny cleanup to udp_sock_handler() David Gibson
2023-08-07 13:46 ` [PATCH 6/9] epoll: Split handling of TCP timerfds into its own handler function David Gibson
2023-08-07 13:46 ` [PATCH 7/9] epoll: Split handling of listening TCP sockets into their own handler David Gibson
2023-08-09 6:29 ` David Gibson
2023-08-07 13:46 ` [PATCH 8/9] epoll: Split listening Unix domain socket into its own type David Gibson
2023-08-09 19:59 ` Stefano Brivio
2023-08-10 1:08 ` David Gibson
2023-08-10 7:50 ` Stefano Brivio
2023-08-11 3:17 ` David Gibson
2023-08-07 13:46 ` [PATCH 9/9] epoll: Use different epoll types for passt and pasta tap fds David Gibson
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