On Mon, 9 Dec 2024 17:54:49 +0100 Laurent Vivier <lvivier(a)redhat.com> wrote:Merge code from tap_backend_init(), tap_sock_tun_init() and tap_listen_handler() to set epoll_ref entry and to add it to epollfd. No functionality change Signed-off-by: Laurent Vivier <lvivier(a)redhat.com> --- tap.c | 66 +++++++++++++++++++++++++++-------------------------------- 1 file changed, 30 insertions(+), 36 deletions(-) diff --git a/tap.c b/tap.c index c4180643bd0a..b2d30456e8dc 100644 --- a/tap.c +++ b/tap.c @@ -1255,6 +1255,33 @@ static void tap_sock_unix_init(const struct ctx *c) epoll_ctl(c->epollfd, EPOLL_CTL_ADD, c->fd_tap_listen, &ev); } +/** + * tap_start_connection() - start a new connection + * @c: Execution context + */ +static void tap_start_connection(const struct ctx *c) +{ + struct epoll_event ev = { 0 }; + union epoll_ref ref = { 0 }; + + ref.fd = c->fd_tap; + switch (c->mode) { + case MODE_PASST: + ref.type = EPOLL_TYPE_TAP_PASST; + break; + case MODE_PASTA: + ref.type = EPOLL_TYPE_TAP_PASTA; + break; + case MODE_VU: + ref.type = EPOLL_TYPE_VHOST_CMD; + break; + } + + ev.events = EPOLLIN | EPOLLRDHUP; + ev.data.u64 = ref.u64; + epoll_ctl(c->epollfd, EPOLL_CTL_ADD, c->fd_tap, &ev); +} + /** * tap_listen_handler() - Handle new connection on listening socket * @c: Execution context @@ -1262,8 +1289,6 @@ static void tap_sock_unix_init(const struct ctx *c) */ void tap_listen_handler(struct ctx *c, uint32_t events) { - struct epoll_event ev = { 0 }; - union epoll_ref ref = { 0 }; int v = INT_MAX / 2; struct ucred ucred; socklen_t len; @@ -1302,14 +1327,7 @@ void tap_listen_handler(struct ctx *c, uint32_t events) setsockopt(c->fd_tap, SOL_SOCKET, SO_SNDBUF, &v, sizeof(v))) trace("tap: failed to set SO_SNDBUF to %i", v); - ref.fd = c->fd_tap; - if (c->mode == MODE_VU) - ref.type = EPOLL_TYPE_VHOST_CMD; - else - ref.type = EPOLL_TYPE_TAP_PASST; - ev.events = EPOLLIN | EPOLLRDHUP; - ev.data.u64 = ref.u64; - epoll_ctl(c->epollfd, EPOLL_CTL_ADD, c->fd_tap, &ev); + tap_start_connection(c); } /** @@ -1353,19 +1371,13 @@ static int tap_ns_tun(void *arg) */ static void tap_sock_tun_init(struct ctx *c) { - union epoll_ref ref = { .type = EPOLL_TYPE_TAP_PASTA }; - struct epoll_event ev = { 0 }; - NS_CALL(tap_ns_tun, c); if (c->fd_tap == -1) die("Failed to set up tap device in namespace"); pasta_ns_conf(c); - ref.fd = c->fd_tap; - ev.events = EPOLLIN | EPOLLRDHUP; - ev.data.u64 = ref.u64; - epoll_ctl(c->epollfd, EPOLL_CTL_ADD, c->fd_tap, &ev); + tap_start_connection(c); } /** @@ -1399,26 +1411,8 @@ void tap_backend_init(struct ctx *c) tap_sock_update_pool(pkt_buf, sizeof(pkt_buf)); if (c->fd_tap != -1) { /* Passed as --fd */ - struct epoll_event ev = { 0 }; - union epoll_ref ref; - ASSERT(c->one_off); - ref.fd = c->fd_tap; - switch (c->mode) { - case MODE_PASST: - ref.type = EPOLL_TYPE_TAP_PASST; - break; - case MODE_PASTA: - ref.type = EPOLL_TYPE_TAP_PASTA; - break; - case MODE_VU: - ref.type = EPOLL_TYPE_VHOST_CMD; - break; - } - - ev.events = EPOLLIN | EPOLLRDHUP; - ev.data.u64 = ref.u64; - epoll_ctl(c->epollfd, EPOLL_CTL_ADD, c->fd_tap, &ev); + tap_start_connection(c); return; }