[PATCH 1/5] util: Simplify epoll_del() interface to take epollfd directly

[Laurent Vivier <lvivier@redhat.com>]

Change epoll_del() to accept the epoll file descriptor directly instead
of the full context structure. This simplifies the interface and aligns
with the threading refactoring by reducing dependency on the context
structure for basic epoll operations as we will manage an epollfd per
thread.

Signed-off-by: Laurent Vivier <lvivier@redhat.com>
---
 icmp.c       | 2 +-
 tap.c        | 2 +-
 tcp.c        | 6 +++---
 tcp_splice.c | 4 ++--
 udp_flow.c   | 4 ++--
 util.c       | 6 +++---
 util.h       | 2 +-
 vhost_user.c | 6 +++---
 8 files changed, 16 insertions(+), 16 deletions(-)

diff --git a/icmp.c b/icmp.c
index 6dffafb0bf54..bd3108a21675 100644
--- a/icmp.c
+++ b/icmp.c
@@ -151,7 +151,7 @@ unexpected:
 static void icmp_ping_close(const struct ctx *c,
 			    const struct icmp_ping_flow *pingf)
 {
-	epoll_del(c, pingf->sock);
+	epoll_del(c->epollfd, pingf->sock);
 	close(pingf->sock);
 	flow_hash_remove(c, FLOW_SIDX(pingf, INISIDE));
 }
diff --git a/tap.c b/tap.c
index 95d309bd1938..134c37a72979 100644
--- a/tap.c
+++ b/tap.c
@@ -1142,7 +1142,7 @@ void tap_sock_reset(struct ctx *c)
 	}
 
 	/* Close the connected socket, wait for a new connection */
-	epoll_del(c, c->fd_tap);
+	epoll_del(c->epollfd, c->fd_tap);
 	close(c->fd_tap);
 	c->fd_tap = -1;
 	if (c->mode == MODE_VU)
diff --git a/tcp.c b/tcp.c
index 48b1ef29bfe8..04725deabb65 100644
--- a/tcp.c
+++ b/tcp.c
@@ -511,9 +511,9 @@ static int tcp_epoll_ctl(const struct ctx *c, struct tcp_tap_conn *conn)
 
 	if (conn->events == CLOSED) {
 		if (conn->in_epoll)
-			epoll_del(c, conn->sock);
+			epoll_del(c->epollfd, conn->sock);
 		if (conn->timer != -1)
-			epoll_del(c, conn->timer);
+			epoll_del(c->epollfd, conn->timer);
 		return 0;
 	}
 
@@ -3445,7 +3445,7 @@ int tcp_flow_migrate_source_ext(const struct ctx *c,
 	if (c->migrate_no_linger)
 		close(s);
 	else
-		epoll_del(c, s);
+		epoll_del(c->epollfd, s);
 
 	/* Adjustments unrelated to FIN segments: sequence numbers we dumped are
 	 * based on the end of the queues.
diff --git a/tcp_splice.c b/tcp_splice.c
index 26cb63064583..666ee62b738f 100644
--- a/tcp_splice.c
+++ b/tcp_splice.c
@@ -204,8 +204,8 @@ static void conn_flag_do(const struct ctx *c, struct tcp_splice_conn *conn,
 	}
 
 	if (flag == CLOSING) {
-		epoll_del(c, conn->s[0]);
-		epoll_del(c, conn->s[1]);
+		epoll_del(c->epollfd, conn->s[0]);
+		epoll_del(c->epollfd, conn->s[1]);
 	}
 }
 
diff --git a/udp_flow.c b/udp_flow.c
index cef3fb588bbe..84973f807167 100644
--- a/udp_flow.c
+++ b/udp_flow.c
@@ -51,7 +51,7 @@ void udp_flow_close(const struct ctx *c, struct udp_flow *uflow)
 	flow_foreach_sidei(sidei) {
 		flow_hash_remove(c, FLOW_SIDX(uflow, sidei));
 		if (uflow->s[sidei] >= 0) {
-			epoll_del(c, uflow->s[sidei]);
+			epoll_del(c->epollfd, uflow->s[sidei]);
 			close(uflow->s[sidei]);
 			uflow->s[sidei] = -1;
 		}
@@ -88,7 +88,7 @@ static int udp_flow_sock(const struct ctx *c,
 	if (flowside_connect(c, s, pif, side) < 0) {
 		int rc = -errno;
 
-		epoll_del(c, s);
+		epoll_del(c->epollfd, s);
 		close(s);
 
 		flow_dbg_perror(uflow, "Couldn't connect flow socket");
diff --git a/util.c b/util.c
index c492f904b3fc..88a91b1100f5 100644
--- a/util.c
+++ b/util.c
@@ -996,12 +996,12 @@ void raw_random(void *buf, size_t buflen)
 
 /**
  * epoll_del() - Remove a file descriptor from our passt epoll
- * @c:		Execution context
+ * @epollfd:	epoll file descriptor to add to
  * @fd:		File descriptor to remove
  */
-void epoll_del(const struct ctx *c, int fd)
+void epoll_del(int epollfd, int fd)
 {
-	epoll_ctl(c->epollfd, EPOLL_CTL_DEL, fd, NULL);
+	epoll_ctl(epollfd, EPOLL_CTL_DEL, fd, NULL);
 
 }
 
diff --git a/util.h b/util.h
index 22eaac56e719..c61cbef357aa 100644
--- a/util.h
+++ b/util.h
@@ -300,7 +300,7 @@ static inline bool mod_between(unsigned x, unsigned i, unsigned j, unsigned m)
 #define FPRINTF(f, ...)	(void)fprintf(f, __VA_ARGS__)
 
 void raw_random(void *buf, size_t buflen);
-void epoll_del(const struct ctx *c, int fd);
+void epoll_del(int epollfd, int fd);
 
 /*
  * Starting from glibc 2.40.9000 and commit 25a5eb4010df ("string: strerror,
diff --git a/vhost_user.c b/vhost_user.c
index fa343a86fac2..1221ac1abcd0 100644
--- a/vhost_user.c
+++ b/vhost_user.c
@@ -733,7 +733,7 @@ static bool vu_get_vring_base_exec(struct vu_dev *vdev,
 		vdev->vq[idx].call_fd = -1;
 	}
 	if (vdev->vq[idx].kick_fd != -1) {
-		epoll_del(vdev->context, vdev->vq[idx].kick_fd);
+		epoll_del(vdev->context->epollfd, vdev->vq[idx].kick_fd);
 		close(vdev->vq[idx].kick_fd);
 		vdev->vq[idx].kick_fd = -1;
 	}
@@ -801,7 +801,7 @@ static bool vu_set_vring_kick_exec(struct vu_dev *vdev,
 	vu_check_queue_msg_file(vmsg);
 
 	if (vdev->vq[idx].kick_fd != -1) {
-		epoll_del(vdev->context, vdev->vq[idx].kick_fd);
+		epoll_del(vdev->context->epollfd, vdev->vq[idx].kick_fd);
 		close(vdev->vq[idx].kick_fd);
 		vdev->vq[idx].kick_fd = -1;
 	}
@@ -1092,7 +1092,7 @@ void vu_cleanup(struct vu_dev *vdev)
 			vq->err_fd = -1;
 		}
 		if (vq->kick_fd != -1) {
-			epoll_del(vdev->context, vq->kick_fd);
+			epoll_del(vdev->context->epollfd, vq->kick_fd);
 			close(vq->kick_fd);
 			vq->kick_fd = -1;
 		}
-- 
2.50.1