void citp_waitable_cleanup(ci_netif* ni, citp_waitable_obj* wo, int do_free) { if( wo->waitable.sb_aflags & CI_SB_AFLAG_MOVED_AWAY ) { if( do_free ) citp_waitable_obj_free(ni, &wo->waitable); } else if( wo->waitable.state == CI_TCP_LISTEN ) ci_tcp_listen_all_fds_gone(ni, &wo->tcp_listen, do_free); else if( wo->waitable.state & CI_TCP_STATE_TCP ) ci_tcp_all_fds_gone(ni, &wo->tcp, do_free); #if CI_CFG_UDP else if( wo->waitable.state == CI_TCP_STATE_UDP ) ci_udp_all_fds_gone(ni, wo->waitable.bufid, do_free); #endif #if CI_CFG_USERSPACE_PIPE else if( wo->waitable.state == CI_TCP_STATE_PIPE ) ci_pipe_all_fds_gone(ni, &wo->pipe, do_free); #endif else if( do_free ) { /* The only non-TCP and non-UDP state in FREE. But FREE endpoint is * already free, we can't free it again. Possibly, it is a * placeholder for future endpoint types, such as epoll? */ citp_waitable_obj_free(ni, &wo->waitable); } }
void ci_udp_state_free(ci_netif* ni, ci_udp_state* us) { ci_assert(ci_netif_is_locked(ni)); ci_assert(us->s.b.state == CI_TCP_STATE_UDP); ci_assert(ci_ni_dllist_is_self_linked(ni, &us->s.b.post_poll_link)); ci_udp_recv_q_drop(ni, &us->timestamp_q); citp_waitable_obj_free(ni, &us->s.b); }
static struct oo_pipe* oo_pipe_buf_get(ci_netif* netif) { citp_waitable_obj *wo; int rc = -1; wo = citp_waitable_obj_alloc(netif); if( ! wo ) return NULL; rc = oo_pipe_init(netif, &wo->pipe); if( rc != 0 ) { citp_waitable_obj_free(netif, &wo->waitable); return NULL; } return &wo->pipe; }
/* c_ni is assumed to be locked on enterance and is always unlocked on * exit. */ int ci_tcp_connect_lo_toconn(ci_netif *c_ni, oo_sp c_id, ci_uint32 dst, ci_netif *l_ni, oo_sp l_id) { ci_tcp_state *ts; ci_tcp_socket_listen *tls, *alien_tls; citp_waitable_obj *wo; citp_waitable *w; int rc; ci_assert(ci_netif_is_locked(c_ni)); ci_assert(OO_SP_NOT_NULL(c_id)); ci_assert(OO_SP_NOT_NULL(l_id)); LOG_TC(log("%s: connect %d:%d to %d:%d", __FUNCTION__, c_ni->state->stack_id, OO_SP_TO_INT(c_id), l_ni->state->stack_id, OO_SP_TO_INT(l_id))); alien_tls = SP_TO_TCP_LISTEN(l_ni, l_id); if( (int)ci_tcp_acceptq_n(alien_tls) >= alien_tls->acceptq_max ) { ci_netif_unlock(c_ni); return -EBUSY; } /* In c_ni, create shadow listening socket tls (copy l_id) */ ts = ci_tcp_get_state_buf(c_ni); if( ts == NULL ) { ci_netif_unlock(c_ni); LOG_E(ci_log("%s: [%d] out of socket buffers", __FUNCTION__, NI_ID(c_ni))); return -ENOMEM; } /* init common tcp fields */ ts->s.so = alien_tls->s.so; ts->s.cp.ip_ttl = alien_tls->s.cp.ip_ttl; S_TCP_HDR(&ts->s)->tcp_source_be16 = S_TCP_HDR(&alien_tls->s)->tcp_source_be16; ts->s.domain = alien_tls->s.domain; ts->c = alien_tls->c; ts->c.tcp_defer_accept = OO_TCP_DEFER_ACCEPT_OFF; /* make sure nobody will ever connect to our "shadow" socket * except us */ ci_bit_set(&ts->s.b.sb_aflags, CI_SB_AFLAG_ORPHAN_BIT); ci_tcp_set_slow_state(c_ni, ts, CI_TCP_LISTEN); tls = SOCK_TO_TCP_LISTEN(&ts->s); /* no timer: */ tls->s.s_flags = alien_tls->s.s_flags | CI_SOCK_FLAG_BOUND_ALIEN; tls->acceptq_max = 1; rc = ci_tcp_listen_init(c_ni, tls); if( rc != 0 ) { citp_waitable_obj_free(c_ni, &tls->s.b); return rc; } /* Connect c_id to tls */ ts = SP_TO_TCP(c_ni, c_id); rc = ci_tcp_connect_lo_samestack(c_ni, ts, tls->s.b.bufid); /* Accept as from tls */ if( !ci_tcp_acceptq_not_empty(tls) ) { /* it is possible, for example, if ci_tcp_listenq_try_promote() failed * because there are no endpoints */ ci_tcp_listenq_drop_all(c_ni, tls); citp_waitable_obj_free(c_ni, &tls->s.b); ci_netif_unlock(c_ni); return -EBUSY; } w = ci_tcp_acceptq_get(c_ni, tls); ci_assert(w); LOG_TV(ci_log("%s: %d:%d to %d:%d shadow %d:%d accepted %d:%d", __FUNCTION__, c_ni->state->stack_id, OO_SP_TO_INT(c_id), l_ni->state->stack_id, OO_SP_TO_INT(l_id), c_ni->state->stack_id, tls->s.b.bufid, c_ni->state->stack_id, w->bufid)); ci_assert(w->state & CI_TCP_STATE_TCP); ci_assert(w->state != CI_TCP_LISTEN); /* Destroy tls. * NB: nobody could possibly connect to it, so no need to do proper * shutdown. */ ci_assert_equal(ci_tcp_acceptq_n(tls), 0); ci_tcp_listenq_drop_all(c_ni, tls); citp_waitable_obj_free(c_ni, &tls->s.b); ci_netif_unlock(c_ni); /* Keep a port reference */ { tcp_helper_endpoint_t *l_ep, *a_ep; struct oo_file_ref* os_sock_ref; ci_irqlock_state_t lock_flags; l_ep = ci_trs_ep_get(netif2tcp_helper_resource(l_ni), l_id); a_ep = ci_trs_ep_get(netif2tcp_helper_resource(c_ni), W_SP(w)); ci_irqlock_lock(&l_ep->thr->lock, &lock_flags); os_sock_ref = l_ep->os_socket; ci_assert_equal(a_ep->os_port_keeper, NULL); if( os_sock_ref != NULL ) { os_sock_ref = oo_file_ref_add(os_sock_ref); os_sock_ref = oo_file_ref_xchg(&a_ep->os_port_keeper, os_sock_ref); ci_irqlock_unlock(&l_ep->thr->lock, &lock_flags); if( os_sock_ref != NULL ) oo_file_ref_drop(os_sock_ref); } else { ci_irqlock_unlock(&l_ep->thr->lock, &lock_flags); goto cleanup; } } /* lock l_ni: Check that l_id is the same socket it used to be */ /* create ref-sock in l_ni, put it into acc q */ if( ci_netif_lock(l_ni) != 0 ) goto cleanup; if( alien_tls->s.b.state != CI_TCP_LISTEN || (alien_tls->s.b.sb_aflags & CI_SB_AFLAG_ORPHAN) || S_TCP_HDR(&alien_tls->s)->tcp_source_be16 != TS_TCP(ts)->tcp_dest_be16 || (alien_tls->s.pkt.ip.ip_saddr_be32 != INADDR_ANY && alien_tls->s.pkt.ip.ip_saddr_be32 != ts->s.pkt.ip.ip_daddr_be32) ) { ci_netif_unlock(l_ni); goto cleanup; } ci_bit_mask_set(&w->sb_aflags, CI_SB_AFLAG_TCP_IN_ACCEPTQ | CI_SB_AFLAG_ORPHAN); wo = citp_waitable_obj_alloc(l_ni); if( wo == NULL ) { ci_netif_unlock(l_ni); goto cleanup; } wo->waitable.state = CI_TCP_CLOSED; wo->waitable.sb_aflags |= CI_SB_AFLAG_MOVED_AWAY; wo->waitable.moved_to_stack_id = c_ni->state->stack_id; wo->waitable.moved_to_sock_id = W_SP(w); LOG_TC(log("%s: put to acceptq %d:%d referencing %d:%d", __func__, l_ni->state->stack_id, OO_SP_TO_INT(W_SP(&wo->waitable)), c_ni->state->stack_id, OO_SP_TO_INT(W_SP(w)))); ci_tcp_acceptq_put(l_ni, alien_tls, &wo->waitable); citp_waitable_wake_not_in_poll(l_ni, &alien_tls->s.b, CI_SB_FLAG_WAKE_RX); ci_netif_unlock(l_ni); return rc; cleanup: ci_assert(w->sb_aflags & CI_SB_AFLAG_ORPHAN); ci_bit_mask_clear(&w->sb_aflags, CI_SB_AFLAG_TCP_IN_ACCEPTQ | CI_SB_AFLAG_ORPHAN); efab_tcp_helper_close_endpoint(netif2tcp_helper_resource(c_ni), w->bufid); /* we can not guarantee c_ni lock, so we can' call * ci_tcp_drop(c_ni, ts). So, we return error; UL will handover * and close ts endpoint. */ return -EBUSY; }