| /* |
| * Copyright (c) 2018 Chelsio Communications, Inc. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| * |
| * Written by: Atul Gupta (atul.gupta@chelsio.com) |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/list.h> |
| #include <linux/workqueue.h> |
| #include <linux/skbuff.h> |
| #include <linux/timer.h> |
| #include <linux/notifier.h> |
| #include <linux/inetdevice.h> |
| #include <linux/ip.h> |
| #include <linux/tcp.h> |
| #include <linux/sched/signal.h> |
| #include <linux/kallsyms.h> |
| #include <linux/kprobes.h> |
| #include <linux/if_vlan.h> |
| #include <net/inet_common.h> |
| #include <net/tcp.h> |
| #include <net/dst.h> |
| |
| #include "chtls.h" |
| #include "chtls_cm.h" |
| |
| /* |
| * State transitions and actions for close. Note that if we are in SYN_SENT |
| * we remain in that state as we cannot control a connection while it's in |
| * SYN_SENT; such connections are allowed to establish and are then aborted. |
| */ |
| static unsigned char new_state[16] = { |
| /* current state: new state: action: */ |
| /* (Invalid) */ TCP_CLOSE, |
| /* TCP_ESTABLISHED */ TCP_FIN_WAIT1 | TCP_ACTION_FIN, |
| /* TCP_SYN_SENT */ TCP_SYN_SENT, |
| /* TCP_SYN_RECV */ TCP_FIN_WAIT1 | TCP_ACTION_FIN, |
| /* TCP_FIN_WAIT1 */ TCP_FIN_WAIT1, |
| /* TCP_FIN_WAIT2 */ TCP_FIN_WAIT2, |
| /* TCP_TIME_WAIT */ TCP_CLOSE, |
| /* TCP_CLOSE */ TCP_CLOSE, |
| /* TCP_CLOSE_WAIT */ TCP_LAST_ACK | TCP_ACTION_FIN, |
| /* TCP_LAST_ACK */ TCP_LAST_ACK, |
| /* TCP_LISTEN */ TCP_CLOSE, |
| /* TCP_CLOSING */ TCP_CLOSING, |
| }; |
| |
| static struct chtls_sock *chtls_sock_create(struct chtls_dev *cdev) |
| { |
| struct chtls_sock *csk = kzalloc(sizeof(*csk), GFP_ATOMIC); |
| |
| if (!csk) |
| return NULL; |
| |
| csk->txdata_skb_cache = alloc_skb(TXDATA_SKB_LEN, GFP_ATOMIC); |
| if (!csk->txdata_skb_cache) { |
| kfree(csk); |
| return NULL; |
| } |
| |
| kref_init(&csk->kref); |
| csk->cdev = cdev; |
| skb_queue_head_init(&csk->txq); |
| csk->wr_skb_head = NULL; |
| csk->wr_skb_tail = NULL; |
| csk->mss = MAX_MSS; |
| csk->tlshws.ofld = 1; |
| csk->tlshws.txkey = -1; |
| csk->tlshws.rxkey = -1; |
| csk->tlshws.mfs = TLS_MFS; |
| skb_queue_head_init(&csk->tlshws.sk_recv_queue); |
| return csk; |
| } |
| |
| static void chtls_sock_release(struct kref *ref) |
| { |
| struct chtls_sock *csk = |
| container_of(ref, struct chtls_sock, kref); |
| |
| kfree(csk); |
| } |
| |
| static struct net_device *chtls_ipv4_netdev(struct chtls_dev *cdev, |
| struct sock *sk) |
| { |
| struct net_device *ndev = cdev->ports[0]; |
| |
| if (likely(!inet_sk(sk)->inet_rcv_saddr)) |
| return ndev; |
| |
| ndev = ip_dev_find(&init_net, inet_sk(sk)->inet_rcv_saddr); |
| if (!ndev) |
| return NULL; |
| |
| if (is_vlan_dev(ndev)) |
| return vlan_dev_real_dev(ndev); |
| return ndev; |
| } |
| |
| static void assign_rxopt(struct sock *sk, unsigned int opt) |
| { |
| const struct chtls_dev *cdev; |
| struct chtls_sock *csk; |
| struct tcp_sock *tp; |
| |
| csk = rcu_dereference_sk_user_data(sk); |
| tp = tcp_sk(sk); |
| |
| cdev = csk->cdev; |
| tp->tcp_header_len = sizeof(struct tcphdr); |
| tp->rx_opt.mss_clamp = cdev->mtus[TCPOPT_MSS_G(opt)] - 40; |
| tp->mss_cache = tp->rx_opt.mss_clamp; |
| tp->rx_opt.tstamp_ok = TCPOPT_TSTAMP_G(opt); |
| tp->rx_opt.snd_wscale = TCPOPT_SACK_G(opt); |
| tp->rx_opt.wscale_ok = TCPOPT_WSCALE_OK_G(opt); |
| SND_WSCALE(tp) = TCPOPT_SND_WSCALE_G(opt); |
| if (!tp->rx_opt.wscale_ok) |
| tp->rx_opt.rcv_wscale = 0; |
| if (tp->rx_opt.tstamp_ok) { |
| tp->tcp_header_len += TCPOLEN_TSTAMP_ALIGNED; |
| tp->rx_opt.mss_clamp -= TCPOLEN_TSTAMP_ALIGNED; |
| } else if (csk->opt2 & TSTAMPS_EN_F) { |
| csk->opt2 &= ~TSTAMPS_EN_F; |
| csk->mtu_idx = TCPOPT_MSS_G(opt); |
| } |
| } |
| |
| static void chtls_purge_receive_queue(struct sock *sk) |
| { |
| struct sk_buff *skb; |
| |
| while ((skb = __skb_dequeue(&sk->sk_receive_queue)) != NULL) { |
| skb_dst_set(skb, (void *)NULL); |
| kfree_skb(skb); |
| } |
| } |
| |
| static void chtls_purge_write_queue(struct sock *sk) |
| { |
| struct chtls_sock *csk = rcu_dereference_sk_user_data(sk); |
| struct sk_buff *skb; |
| |
| while ((skb = __skb_dequeue(&csk->txq))) { |
| sk->sk_wmem_queued -= skb->truesize; |
| __kfree_skb(skb); |
| } |
| } |
| |
| static void chtls_purge_recv_queue(struct sock *sk) |
| { |
| struct chtls_sock *csk = rcu_dereference_sk_user_data(sk); |
| struct chtls_hws *tlsk = &csk->tlshws; |
| struct sk_buff *skb; |
| |
| while ((skb = __skb_dequeue(&tlsk->sk_recv_queue)) != NULL) { |
| skb_dst_set(skb, NULL); |
| kfree_skb(skb); |
| } |
| } |
| |
| static void abort_arp_failure(void *handle, struct sk_buff *skb) |
| { |
| struct cpl_abort_req *req = cplhdr(skb); |
| struct chtls_dev *cdev; |
| |
| cdev = (struct chtls_dev *)handle; |
| req->cmd = CPL_ABORT_NO_RST; |
| cxgb4_ofld_send(cdev->lldi->ports[0], skb); |
| } |
| |
| static struct sk_buff *alloc_ctrl_skb(struct sk_buff *skb, int len) |
| { |
| if (likely(skb && !skb_shared(skb) && !skb_cloned(skb))) { |
| __skb_trim(skb, 0); |
| refcount_add(2, &skb->users); |
| } else { |
| skb = alloc_skb(len, GFP_KERNEL | __GFP_NOFAIL); |
| } |
| return skb; |
| } |
| |
| static void chtls_send_abort(struct sock *sk, int mode, struct sk_buff *skb) |
| { |
| struct cpl_abort_req *req; |
| struct chtls_sock *csk; |
| struct tcp_sock *tp; |
| |
| csk = rcu_dereference_sk_user_data(sk); |
| tp = tcp_sk(sk); |
| |
| if (!skb) |
| skb = alloc_ctrl_skb(csk->txdata_skb_cache, sizeof(*req)); |
| |
| req = (struct cpl_abort_req *)skb_put(skb, sizeof(*req)); |
| INIT_TP_WR_CPL(req, CPL_ABORT_REQ, csk->tid); |
| skb_set_queue_mapping(skb, (csk->txq_idx << 1) | CPL_PRIORITY_DATA); |
| req->rsvd0 = htonl(tp->snd_nxt); |
| req->rsvd1 = !csk_flag_nochk(csk, CSK_TX_DATA_SENT); |
| req->cmd = mode; |
| t4_set_arp_err_handler(skb, csk->cdev, abort_arp_failure); |
| send_or_defer(sk, tp, skb, mode == CPL_ABORT_SEND_RST); |
| } |
| |
| static void chtls_send_reset(struct sock *sk, int mode, struct sk_buff *skb) |
| { |
| struct chtls_sock *csk = rcu_dereference_sk_user_data(sk); |
| |
| if (unlikely(csk_flag_nochk(csk, CSK_ABORT_SHUTDOWN) || |
| !csk->cdev)) { |
| if (sk->sk_state == TCP_SYN_RECV) |
| csk_set_flag(csk, CSK_RST_ABORTED); |
| goto out; |
| } |
| |
| if (!csk_flag_nochk(csk, CSK_TX_DATA_SENT)) { |
| struct tcp_sock *tp = tcp_sk(sk); |
| |
| if (send_tx_flowc_wr(sk, 0, tp->snd_nxt, tp->rcv_nxt) < 0) |
| WARN_ONCE(1, "send tx flowc error"); |
| csk_set_flag(csk, CSK_TX_DATA_SENT); |
| } |
| |
| csk_set_flag(csk, CSK_ABORT_RPL_PENDING); |
| chtls_purge_write_queue(sk); |
| |
| csk_set_flag(csk, CSK_ABORT_SHUTDOWN); |
| if (sk->sk_state != TCP_SYN_RECV) |
| chtls_send_abort(sk, mode, skb); |
| else |
| goto out; |
| |
| return; |
| out: |
| kfree_skb(skb); |
| } |
| |
| static void release_tcp_port(struct sock *sk) |
| { |
| if (inet_csk(sk)->icsk_bind_hash) |
| inet_put_port(sk); |
| } |
| |
| static void tcp_uncork(struct sock *sk) |
| { |
| struct tcp_sock *tp = tcp_sk(sk); |
| |
| if (tp->nonagle & TCP_NAGLE_CORK) { |
| tp->nonagle &= ~TCP_NAGLE_CORK; |
| chtls_tcp_push(sk, 0); |
| } |
| } |
| |
| static void chtls_close_conn(struct sock *sk) |
| { |
| struct cpl_close_con_req *req; |
| struct chtls_sock *csk; |
| struct sk_buff *skb; |
| unsigned int tid; |
| unsigned int len; |
| |
| len = roundup(sizeof(struct cpl_close_con_req), 16); |
| csk = rcu_dereference_sk_user_data(sk); |
| tid = csk->tid; |
| |
| skb = alloc_skb(len, GFP_KERNEL | __GFP_NOFAIL); |
| req = (struct cpl_close_con_req *)__skb_put(skb, len); |
| memset(req, 0, len); |
| req->wr.wr_hi = htonl(FW_WR_OP_V(FW_TP_WR) | |
| FW_WR_IMMDLEN_V(sizeof(*req) - |
| sizeof(req->wr))); |
| req->wr.wr_mid = htonl(FW_WR_LEN16_V(DIV_ROUND_UP(sizeof(*req), 16)) | |
| FW_WR_FLOWID_V(tid)); |
| |
| OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, tid)); |
| |
| tcp_uncork(sk); |
| skb_entail(sk, skb, ULPCB_FLAG_NO_HDR | ULPCB_FLAG_NO_APPEND); |
| if (sk->sk_state != TCP_SYN_SENT) |
| chtls_push_frames(csk, 1); |
| } |
| |
| /* |
| * Perform a state transition during close and return the actions indicated |
| * for the transition. Do not make this function inline, the main reason |
| * it exists at all is to avoid multiple inlining of tcp_set_state. |
| */ |
| static int make_close_transition(struct sock *sk) |
| { |
| int next = (int)new_state[sk->sk_state]; |
| |
| tcp_set_state(sk, next & TCP_STATE_MASK); |
| return next & TCP_ACTION_FIN; |
| } |
| |
| void chtls_close(struct sock *sk, long timeout) |
| { |
| int data_lost, prev_state; |
| struct chtls_sock *csk; |
| |
| csk = rcu_dereference_sk_user_data(sk); |
| |
| lock_sock(sk); |
| sk->sk_shutdown |= SHUTDOWN_MASK; |
| |
| data_lost = skb_queue_len(&sk->sk_receive_queue); |
| data_lost |= skb_queue_len(&csk->tlshws.sk_recv_queue); |
| chtls_purge_recv_queue(sk); |
| chtls_purge_receive_queue(sk); |
| |
| if (sk->sk_state == TCP_CLOSE) { |
| goto wait; |
| } else if (data_lost || sk->sk_state == TCP_SYN_SENT) { |
| chtls_send_reset(sk, CPL_ABORT_SEND_RST, NULL); |
| release_tcp_port(sk); |
| goto unlock; |
| } else if (sock_flag(sk, SOCK_LINGER) && !sk->sk_lingertime) { |
| sk->sk_prot->disconnect(sk, 0); |
| } else if (make_close_transition(sk)) { |
| chtls_close_conn(sk); |
| } |
| wait: |
| if (timeout) |
| sk_stream_wait_close(sk, timeout); |
| |
| unlock: |
| prev_state = sk->sk_state; |
| sock_hold(sk); |
| sock_orphan(sk); |
| |
| release_sock(sk); |
| |
| local_bh_disable(); |
| bh_lock_sock(sk); |
| |
| if (prev_state != TCP_CLOSE && sk->sk_state == TCP_CLOSE) |
| goto out; |
| |
| if (sk->sk_state == TCP_FIN_WAIT2 && tcp_sk(sk)->linger2 < 0 && |
| !csk_flag(sk, CSK_ABORT_SHUTDOWN)) { |
| struct sk_buff *skb; |
| |
| skb = alloc_skb(sizeof(struct cpl_abort_req), GFP_ATOMIC); |
| if (skb) |
| chtls_send_reset(sk, CPL_ABORT_SEND_RST, skb); |
| } |
| |
| if (sk->sk_state == TCP_CLOSE) |
| inet_csk_destroy_sock(sk); |
| |
| out: |
| bh_unlock_sock(sk); |
| local_bh_enable(); |
| sock_put(sk); |
| } |
| |
| /* |
| * Wait until a socket enters on of the given states. |
| */ |
| static int wait_for_states(struct sock *sk, unsigned int states) |
| { |
| DECLARE_WAITQUEUE(wait, current); |
| struct socket_wq _sk_wq; |
| long current_timeo; |
| int err = 0; |
| |
| current_timeo = 200; |
| |
| /* |
| * We want this to work even when there's no associated struct socket. |
| * In that case we provide a temporary wait_queue_head_t. |
| */ |
| if (!sk->sk_wq) { |
| init_waitqueue_head(&_sk_wq.wait); |
| _sk_wq.fasync_list = NULL; |
| init_rcu_head_on_stack(&_sk_wq.rcu); |
| RCU_INIT_POINTER(sk->sk_wq, &_sk_wq); |
| } |
| |
| add_wait_queue(sk_sleep(sk), &wait); |
| while (!sk_in_state(sk, states)) { |
| if (!current_timeo) { |
| err = -EBUSY; |
| break; |
| } |
| if (signal_pending(current)) { |
| err = sock_intr_errno(current_timeo); |
| break; |
| } |
| set_current_state(TASK_UNINTERRUPTIBLE); |
| release_sock(sk); |
| if (!sk_in_state(sk, states)) |
| current_timeo = schedule_timeout(current_timeo); |
| __set_current_state(TASK_RUNNING); |
| lock_sock(sk); |
| } |
| remove_wait_queue(sk_sleep(sk), &wait); |
| |
| if (rcu_dereference(sk->sk_wq) == &_sk_wq) |
| sk->sk_wq = NULL; |
| return err; |
| } |
| |
| int chtls_disconnect(struct sock *sk, int flags) |
| { |
| struct tcp_sock *tp; |
| int err; |
| |
| tp = tcp_sk(sk); |
| chtls_purge_recv_queue(sk); |
| chtls_purge_receive_queue(sk); |
| chtls_purge_write_queue(sk); |
| |
| if (sk->sk_state != TCP_CLOSE) { |
| sk->sk_err = ECONNRESET; |
| chtls_send_reset(sk, CPL_ABORT_SEND_RST, NULL); |
| err = wait_for_states(sk, TCPF_CLOSE); |
| if (err) |
| return err; |
| } |
| chtls_purge_recv_queue(sk); |
| chtls_purge_receive_queue(sk); |
| tp->max_window = 0xFFFF << (tp->rx_opt.snd_wscale); |
| return tcp_disconnect(sk, flags); |
| } |
| |
| #define SHUTDOWN_ELIGIBLE_STATE (TCPF_ESTABLISHED | \ |
| TCPF_SYN_RECV | TCPF_CLOSE_WAIT) |
| void chtls_shutdown(struct sock *sk, int how) |
| { |
| if ((how & SEND_SHUTDOWN) && |
| sk_in_state(sk, SHUTDOWN_ELIGIBLE_STATE) && |
| make_close_transition(sk)) |
| chtls_close_conn(sk); |
| } |
| |
| void chtls_destroy_sock(struct sock *sk) |
| { |
| struct chtls_sock *csk; |
| |
| csk = rcu_dereference_sk_user_data(sk); |
| chtls_purge_recv_queue(sk); |
| csk->ulp_mode = ULP_MODE_NONE; |
| chtls_purge_write_queue(sk); |
| free_tls_keyid(sk); |
| kref_put(&csk->kref, chtls_sock_release); |
| sk->sk_prot = &tcp_prot; |
| sk->sk_prot->destroy(sk); |
| } |
| |
| static void reset_listen_child(struct sock *child) |
| { |
| struct chtls_sock *csk = rcu_dereference_sk_user_data(child); |
| struct sk_buff *skb; |
| |
| skb = alloc_ctrl_skb(csk->txdata_skb_cache, |
| sizeof(struct cpl_abort_req)); |
| |
| chtls_send_reset(child, CPL_ABORT_SEND_RST, skb); |
| sock_orphan(child); |
| INC_ORPHAN_COUNT(child); |
| if (child->sk_state == TCP_CLOSE) |
| inet_csk_destroy_sock(child); |
| } |
| |
| static void chtls_disconnect_acceptq(struct sock *listen_sk) |
| { |
| struct request_sock **pprev; |
| |
| pprev = ACCEPT_QUEUE(listen_sk); |
| while (*pprev) { |
| struct request_sock *req = *pprev; |
| |
| if (req->rsk_ops == &chtls_rsk_ops) { |
| struct sock *child = req->sk; |
| |
| *pprev = req->dl_next; |
| sk_acceptq_removed(listen_sk); |
| reqsk_put(req); |
| sock_hold(child); |
| local_bh_disable(); |
| bh_lock_sock(child); |
| release_tcp_port(child); |
| reset_listen_child(child); |
| bh_unlock_sock(child); |
| local_bh_enable(); |
| sock_put(child); |
| } else { |
| pprev = &req->dl_next; |
| } |
| } |
| } |
| |
| static int listen_hashfn(const struct sock *sk) |
| { |
| return ((unsigned long)sk >> 10) & (LISTEN_INFO_HASH_SIZE - 1); |
| } |
| |
| static struct listen_info *listen_hash_add(struct chtls_dev *cdev, |
| struct sock *sk, |
| unsigned int stid) |
| { |
| struct listen_info *p = kmalloc(sizeof(*p), GFP_KERNEL); |
| |
| if (p) { |
| int key = listen_hashfn(sk); |
| |
| p->sk = sk; |
| p->stid = stid; |
| spin_lock(&cdev->listen_lock); |
| p->next = cdev->listen_hash_tab[key]; |
| cdev->listen_hash_tab[key] = p; |
| spin_unlock(&cdev->listen_lock); |
| } |
| return p; |
| } |
| |
| static int listen_hash_find(struct chtls_dev *cdev, |
| struct sock *sk) |
| { |
| struct listen_info *p; |
| int stid = -1; |
| int key; |
| |
| key = listen_hashfn(sk); |
| |
| spin_lock(&cdev->listen_lock); |
| for (p = cdev->listen_hash_tab[key]; p; p = p->next) |
| if (p->sk == sk) { |
| stid = p->stid; |
| break; |
| } |
| spin_unlock(&cdev->listen_lock); |
| return stid; |
| } |
| |
| static int listen_hash_del(struct chtls_dev *cdev, |
| struct sock *sk) |
| { |
| struct listen_info *p, **prev; |
| int stid = -1; |
| int key; |
| |
| key = listen_hashfn(sk); |
| prev = &cdev->listen_hash_tab[key]; |
| |
| spin_lock(&cdev->listen_lock); |
| for (p = *prev; p; prev = &p->next, p = p->next) |
| if (p->sk == sk) { |
| stid = p->stid; |
| *prev = p->next; |
| kfree(p); |
| break; |
| } |
| spin_unlock(&cdev->listen_lock); |
| return stid; |
| } |
| |
| static void cleanup_syn_rcv_conn(struct sock *child, struct sock *parent) |
| { |
| struct request_sock *req; |
| struct chtls_sock *csk; |
| |
| csk = rcu_dereference_sk_user_data(child); |
| req = csk->passive_reap_next; |
| |
| reqsk_queue_removed(&inet_csk(parent)->icsk_accept_queue, req); |
| __skb_unlink((struct sk_buff *)&csk->synq, &csk->listen_ctx->synq); |
| chtls_reqsk_free(req); |
| csk->passive_reap_next = NULL; |
| } |
| |
| static void chtls_reset_synq(struct listen_ctx *listen_ctx) |
| { |
| struct sock *listen_sk = listen_ctx->lsk; |
| |
| while (!skb_queue_empty(&listen_ctx->synq)) { |
| struct chtls_sock *csk = |
| container_of((struct synq *)__skb_dequeue |
| (&listen_ctx->synq), struct chtls_sock, synq); |
| struct sock *child = csk->sk; |
| |
| cleanup_syn_rcv_conn(child, listen_sk); |
| sock_hold(child); |
| local_bh_disable(); |
| bh_lock_sock(child); |
| release_tcp_port(child); |
| reset_listen_child(child); |
| bh_unlock_sock(child); |
| local_bh_enable(); |
| sock_put(child); |
| } |
| } |
| |
| int chtls_listen_start(struct chtls_dev *cdev, struct sock *sk) |
| { |
| struct net_device *ndev; |
| struct listen_ctx *ctx; |
| struct adapter *adap; |
| struct port_info *pi; |
| int stid; |
| int ret; |
| |
| if (sk->sk_family != PF_INET) |
| return -EAGAIN; |
| |
| rcu_read_lock(); |
| ndev = chtls_ipv4_netdev(cdev, sk); |
| rcu_read_unlock(); |
| if (!ndev) |
| return -EBADF; |
| |
| pi = netdev_priv(ndev); |
| adap = pi->adapter; |
| if (!(adap->flags & FULL_INIT_DONE)) |
| return -EBADF; |
| |
| if (listen_hash_find(cdev, sk) >= 0) /* already have it */ |
| return -EADDRINUSE; |
| |
| ctx = kmalloc(sizeof(*ctx), GFP_KERNEL); |
| if (!ctx) |
| return -ENOMEM; |
| |
| __module_get(THIS_MODULE); |
| ctx->lsk = sk; |
| ctx->cdev = cdev; |
| ctx->state = T4_LISTEN_START_PENDING; |
| skb_queue_head_init(&ctx->synq); |
| |
| stid = cxgb4_alloc_stid(cdev->tids, sk->sk_family, ctx); |
| if (stid < 0) |
| goto free_ctx; |
| |
| sock_hold(sk); |
| if (!listen_hash_add(cdev, sk, stid)) |
| goto free_stid; |
| |
| ret = cxgb4_create_server(ndev, stid, |
| inet_sk(sk)->inet_rcv_saddr, |
| inet_sk(sk)->inet_sport, 0, |
| cdev->lldi->rxq_ids[0]); |
| if (ret > 0) |
| ret = net_xmit_errno(ret); |
| if (ret) |
| goto del_hash; |
| return 0; |
| del_hash: |
| listen_hash_del(cdev, sk); |
| free_stid: |
| cxgb4_free_stid(cdev->tids, stid, sk->sk_family); |
| sock_put(sk); |
| free_ctx: |
| kfree(ctx); |
| module_put(THIS_MODULE); |
| return -EBADF; |
| } |
| |
| void chtls_listen_stop(struct chtls_dev *cdev, struct sock *sk) |
| { |
| struct listen_ctx *listen_ctx; |
| int stid; |
| |
| stid = listen_hash_del(cdev, sk); |
| if (stid < 0) |
| return; |
| |
| listen_ctx = (struct listen_ctx *)lookup_stid(cdev->tids, stid); |
| chtls_reset_synq(listen_ctx); |
| |
| cxgb4_remove_server(cdev->lldi->ports[0], stid, |
| cdev->lldi->rxq_ids[0], 0); |
| chtls_disconnect_acceptq(sk); |
| } |
| |
| static int chtls_pass_open_rpl(struct chtls_dev *cdev, struct sk_buff *skb) |
| { |
| struct cpl_pass_open_rpl *rpl = cplhdr(skb) + RSS_HDR; |
| unsigned int stid = GET_TID(rpl); |
| struct listen_ctx *listen_ctx; |
| |
| listen_ctx = (struct listen_ctx *)lookup_stid(cdev->tids, stid); |
| if (!listen_ctx) |
| return CPL_RET_BUF_DONE; |
| |
| if (listen_ctx->state == T4_LISTEN_START_PENDING) { |
| listen_ctx->state = T4_LISTEN_STARTED; |
| return CPL_RET_BUF_DONE; |
| } |
| |
| if (rpl->status != CPL_ERR_NONE) { |
| pr_info("Unexpected PASS_OPEN_RPL status %u for STID %u\n", |
| rpl->status, stid); |
| return CPL_RET_BUF_DONE; |
| } |
| cxgb4_free_stid(cdev->tids, stid, listen_ctx->lsk->sk_family); |
| sock_put(listen_ctx->lsk); |
| kfree(listen_ctx); |
| module_put(THIS_MODULE); |
| |
| return 0; |
| } |
| |
| static int chtls_close_listsrv_rpl(struct chtls_dev *cdev, struct sk_buff *skb) |
| { |
| struct cpl_close_listsvr_rpl *rpl = cplhdr(skb) + RSS_HDR; |
| struct listen_ctx *listen_ctx; |
| unsigned int stid; |
| void *data; |
| |
| stid = GET_TID(rpl); |
| data = lookup_stid(cdev->tids, stid); |
| listen_ctx = (struct listen_ctx *)data; |
| |
| if (rpl->status != CPL_ERR_NONE) { |
| pr_info("Unexpected CLOSE_LISTSRV_RPL status %u for STID %u\n", |
| rpl->status, stid); |
| return CPL_RET_BUF_DONE; |
| } |
| |
| cxgb4_free_stid(cdev->tids, stid, listen_ctx->lsk->sk_family); |
| sock_put(listen_ctx->lsk); |
| kfree(listen_ctx); |
| module_put(THIS_MODULE); |
| |
| return 0; |
| } |
| |
| static void chtls_release_resources(struct sock *sk) |
| { |
| struct chtls_sock *csk = rcu_dereference_sk_user_data(sk); |
| struct chtls_dev *cdev = csk->cdev; |
| unsigned int tid = csk->tid; |
| struct tid_info *tids; |
| |
| if (!cdev) |
| return; |
| |
| tids = cdev->tids; |
| kfree_skb(csk->txdata_skb_cache); |
| csk->txdata_skb_cache = NULL; |
| |
| if (csk->l2t_entry) { |
| cxgb4_l2t_release(csk->l2t_entry); |
| csk->l2t_entry = NULL; |
| } |
| |
| cxgb4_remove_tid(tids, csk->port_id, tid, sk->sk_family); |
| sock_put(sk); |
| } |
| |
| static void chtls_conn_done(struct sock *sk) |
| { |
| if (sock_flag(sk, SOCK_DEAD)) |
| chtls_purge_receive_queue(sk); |
| sk_wakeup_sleepers(sk, 0); |
| tcp_done(sk); |
| } |
| |
| static void do_abort_syn_rcv(struct sock *child, struct sock *parent) |
| { |
| /* |
| * If the server is still open we clean up the child connection, |
| * otherwise the server already did the clean up as it was purging |
| * its SYN queue and the skb was just sitting in its backlog. |
| */ |
| if (likely(parent->sk_state == TCP_LISTEN)) { |
| cleanup_syn_rcv_conn(child, parent); |
| /* Without the below call to sock_orphan, |
| * we leak the socket resource with syn_flood test |
| * as inet_csk_destroy_sock will not be called |
| * in tcp_done since SOCK_DEAD flag is not set. |
| * Kernel handles this differently where new socket is |
| * created only after 3 way handshake is done. |
| */ |
| sock_orphan(child); |
| percpu_counter_inc((child)->sk_prot->orphan_count); |
| chtls_release_resources(child); |
| chtls_conn_done(child); |
| } else { |
| if (csk_flag(child, CSK_RST_ABORTED)) { |
| chtls_release_resources(child); |
| chtls_conn_done(child); |
| } |
| } |
| } |
| |
| static void pass_open_abort(struct sock *child, struct sock *parent, |
| struct sk_buff *skb) |
| { |
| do_abort_syn_rcv(child, parent); |
| kfree_skb(skb); |
| } |
| |
| static void bl_pass_open_abort(struct sock *lsk, struct sk_buff *skb) |
| { |
| pass_open_abort(skb->sk, lsk, skb); |
| } |
| |
| static void chtls_pass_open_arp_failure(struct sock *sk, |
| struct sk_buff *skb) |
| { |
| const struct request_sock *oreq; |
| struct chtls_sock *csk; |
| struct chtls_dev *cdev; |
| struct sock *parent; |
| void *data; |
| |
| csk = rcu_dereference_sk_user_data(sk); |
| cdev = csk->cdev; |
| |
| /* |
| * If the connection is being aborted due to the parent listening |
| * socket going away there's nothing to do, the ABORT_REQ will close |
| * the connection. |
| */ |
| if (csk_flag(sk, CSK_ABORT_RPL_PENDING)) { |
| kfree_skb(skb); |
| return; |
| } |
| |
| oreq = csk->passive_reap_next; |
| data = lookup_stid(cdev->tids, oreq->ts_recent); |
| parent = ((struct listen_ctx *)data)->lsk; |
| |
| bh_lock_sock(parent); |
| if (!sock_owned_by_user(parent)) { |
| pass_open_abort(sk, parent, skb); |
| } else { |
| BLOG_SKB_CB(skb)->backlog_rcv = bl_pass_open_abort; |
| __sk_add_backlog(parent, skb); |
| } |
| bh_unlock_sock(parent); |
| } |
| |
| static void chtls_accept_rpl_arp_failure(void *handle, |
| struct sk_buff *skb) |
| { |
| struct sock *sk = (struct sock *)handle; |
| |
| sock_hold(sk); |
| process_cpl_msg(chtls_pass_open_arp_failure, sk, skb); |
| sock_put(sk); |
| } |
| |
| static unsigned int chtls_select_mss(const struct chtls_sock *csk, |
| unsigned int pmtu, |
| struct cpl_pass_accept_req *req) |
| { |
| struct chtls_dev *cdev; |
| struct dst_entry *dst; |
| unsigned int tcpoptsz; |
| unsigned int iphdrsz; |
| unsigned int mtu_idx; |
| struct tcp_sock *tp; |
| unsigned int mss; |
| struct sock *sk; |
| |
| mss = ntohs(req->tcpopt.mss); |
| sk = csk->sk; |
| dst = __sk_dst_get(sk); |
| cdev = csk->cdev; |
| tp = tcp_sk(sk); |
| tcpoptsz = 0; |
| |
| iphdrsz = sizeof(struct iphdr) + sizeof(struct tcphdr); |
| if (req->tcpopt.tstamp) |
| tcpoptsz += round_up(TCPOLEN_TIMESTAMP, 4); |
| |
| tp->advmss = dst_metric_advmss(dst); |
| if (USER_MSS(tp) && tp->advmss > USER_MSS(tp)) |
| tp->advmss = USER_MSS(tp); |
| if (tp->advmss > pmtu - iphdrsz) |
| tp->advmss = pmtu - iphdrsz; |
| if (mss && tp->advmss > mss) |
| tp->advmss = mss; |
| |
| tp->advmss = cxgb4_best_aligned_mtu(cdev->lldi->mtus, |
| iphdrsz + tcpoptsz, |
| tp->advmss - tcpoptsz, |
| 8, &mtu_idx); |
| tp->advmss -= iphdrsz; |
| |
| inet_csk(sk)->icsk_pmtu_cookie = pmtu; |
| return mtu_idx; |
| } |
| |
| static unsigned int select_rcv_wscale(int space, int wscale_ok, int win_clamp) |
| { |
| int wscale = 0; |
| |
| if (space > MAX_RCV_WND) |
| space = MAX_RCV_WND; |
| if (win_clamp && win_clamp < space) |
| space = win_clamp; |
| |
| if (wscale_ok) { |
| while (wscale < 14 && (65535 << wscale) < space) |
| wscale++; |
| } |
| return wscale; |
| } |
| |
| static void chtls_pass_accept_rpl(struct sk_buff *skb, |
| struct cpl_pass_accept_req *req, |
| unsigned int tid) |
| |
| { |
| struct cpl_t5_pass_accept_rpl *rpl5; |
| struct cxgb4_lld_info *lldi; |
| const struct tcphdr *tcph; |
| const struct tcp_sock *tp; |
| struct chtls_sock *csk; |
| unsigned int len; |
| struct sock *sk; |
| u32 opt2, hlen; |
| u64 opt0; |
| |
| sk = skb->sk; |
| tp = tcp_sk(sk); |
| csk = sk->sk_user_data; |
| csk->tid = tid; |
| lldi = csk->cdev->lldi; |
| len = roundup(sizeof(*rpl5), 16); |
| |
| rpl5 = __skb_put_zero(skb, len); |
| INIT_TP_WR(rpl5, tid); |
| |
| OPCODE_TID(rpl5) = cpu_to_be32(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL, |
| csk->tid)); |
| csk->mtu_idx = chtls_select_mss(csk, dst_mtu(__sk_dst_get(sk)), |
| req); |
| opt0 = TCAM_BYPASS_F | |
| WND_SCALE_V(RCV_WSCALE(tp)) | |
| MSS_IDX_V(csk->mtu_idx) | |
| L2T_IDX_V(csk->l2t_entry->idx) | |
| NAGLE_V(!(tp->nonagle & TCP_NAGLE_OFF)) | |
| TX_CHAN_V(csk->tx_chan) | |
| SMAC_SEL_V(csk->smac_idx) | |
| DSCP_V(csk->tos >> 2) | |
| ULP_MODE_V(ULP_MODE_TLS) | |
| RCV_BUFSIZ_V(min(tp->rcv_wnd >> 10, RCV_BUFSIZ_M)); |
| |
| opt2 = RX_CHANNEL_V(0) | |
| RSS_QUEUE_VALID_F | RSS_QUEUE_V(csk->rss_qid); |
| |
| if (!is_t5(lldi->adapter_type)) |
| opt2 |= RX_FC_DISABLE_F; |
| if (req->tcpopt.tstamp) |
| opt2 |= TSTAMPS_EN_F; |
| if (req->tcpopt.sack) |
| opt2 |= SACK_EN_F; |
| hlen = ntohl(req->hdr_len); |
| |
| tcph = (struct tcphdr *)((u8 *)(req + 1) + |
| T6_ETH_HDR_LEN_G(hlen) + T6_IP_HDR_LEN_G(hlen)); |
| if (tcph->ece && tcph->cwr) |
| opt2 |= CCTRL_ECN_V(1); |
| opt2 |= CONG_CNTRL_V(CONG_ALG_NEWRENO); |
| opt2 |= T5_ISS_F; |
| opt2 |= T5_OPT_2_VALID_F; |
| rpl5->opt0 = cpu_to_be64(opt0); |
| rpl5->opt2 = cpu_to_be32(opt2); |
| rpl5->iss = cpu_to_be32((prandom_u32() & ~7UL) - 1); |
| set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id); |
| t4_set_arp_err_handler(skb, sk, chtls_accept_rpl_arp_failure); |
| cxgb4_l2t_send(csk->egress_dev, skb, csk->l2t_entry); |
| } |
| |
| static void inet_inherit_port(struct inet_hashinfo *hash_info, |
| struct sock *lsk, struct sock *newsk) |
| { |
| local_bh_disable(); |
| __inet_inherit_port(lsk, newsk); |
| local_bh_enable(); |
| } |
| |
| static int chtls_backlog_rcv(struct sock *sk, struct sk_buff *skb) |
| { |
| if (skb->protocol) { |
| kfree_skb(skb); |
| return 0; |
| } |
| BLOG_SKB_CB(skb)->backlog_rcv(sk, skb); |
| return 0; |
| } |
| |
| static void chtls_set_tcp_window(struct chtls_sock *csk) |
| { |
| struct net_device *ndev = csk->egress_dev; |
| struct port_info *pi = netdev_priv(ndev); |
| unsigned int linkspeed; |
| u8 scale; |
| |
| linkspeed = pi->link_cfg.speed; |
| scale = linkspeed / SPEED_10000; |
| #define CHTLS_10G_RCVWIN (256 * 1024) |
| csk->rcv_win = CHTLS_10G_RCVWIN; |
| if (scale) |
| csk->rcv_win *= scale; |
| #define CHTLS_10G_SNDWIN (256 * 1024) |
| csk->snd_win = CHTLS_10G_SNDWIN; |
| if (scale) |
| csk->snd_win *= scale; |
| } |
| |
| static struct sock *chtls_recv_sock(struct sock *lsk, |
| struct request_sock *oreq, |
| void *network_hdr, |
| const struct cpl_pass_accept_req *req, |
| struct chtls_dev *cdev) |
| { |
| struct inet_sock *newinet; |
| const struct iphdr *iph; |
| struct net_device *ndev; |
| struct chtls_sock *csk; |
| struct dst_entry *dst; |
| struct neighbour *n; |
| struct tcp_sock *tp; |
| struct sock *newsk; |
| u16 port_id; |
| int rxq_idx; |
| int step; |
| |
| iph = (const struct iphdr *)network_hdr; |
| newsk = tcp_create_openreq_child(lsk, oreq, cdev->askb); |
| if (!newsk) |
| goto free_oreq; |
| |
| dst = inet_csk_route_child_sock(lsk, newsk, oreq); |
| if (!dst) |
| goto free_sk; |
| |
| n = dst_neigh_lookup(dst, &iph->saddr); |
| if (!n) |
| goto free_sk; |
| |
| ndev = n->dev; |
| if (!ndev) |
| goto free_dst; |
| port_id = cxgb4_port_idx(ndev); |
| |
| csk = chtls_sock_create(cdev); |
| if (!csk) |
| goto free_dst; |
| |
| csk->l2t_entry = cxgb4_l2t_get(cdev->lldi->l2t, n, ndev, 0); |
| if (!csk->l2t_entry) |
| goto free_csk; |
| |
| newsk->sk_user_data = csk; |
| newsk->sk_backlog_rcv = chtls_backlog_rcv; |
| |
| tp = tcp_sk(newsk); |
| newinet = inet_sk(newsk); |
| |
| newinet->inet_daddr = iph->saddr; |
| newinet->inet_rcv_saddr = iph->daddr; |
| newinet->inet_saddr = iph->daddr; |
| |
| oreq->ts_recent = PASS_OPEN_TID_G(ntohl(req->tos_stid)); |
| sk_setup_caps(newsk, dst); |
| csk->sk = newsk; |
| csk->passive_reap_next = oreq; |
| csk->tx_chan = cxgb4_port_chan(ndev); |
| csk->port_id = port_id; |
| csk->egress_dev = ndev; |
| csk->tos = PASS_OPEN_TOS_G(ntohl(req->tos_stid)); |
| chtls_set_tcp_window(csk); |
| tp->rcv_wnd = csk->rcv_win; |
| csk->sndbuf = csk->snd_win; |
| csk->ulp_mode = ULP_MODE_TLS; |
| step = cdev->lldi->nrxq / cdev->lldi->nchan; |
| csk->rss_qid = cdev->lldi->rxq_ids[port_id * step]; |
| rxq_idx = port_id * step; |
| csk->txq_idx = (rxq_idx < cdev->lldi->ntxq) ? rxq_idx : |
| port_id * step; |
| csk->sndbuf = newsk->sk_sndbuf; |
| csk->smac_idx = ((struct port_info *)netdev_priv(ndev))->smt_idx; |
| RCV_WSCALE(tp) = select_rcv_wscale(tcp_full_space(newsk), |
| sock_net(newsk)-> |
| ipv4.sysctl_tcp_window_scaling, |
| tp->window_clamp); |
| neigh_release(n); |
| inet_inherit_port(&tcp_hashinfo, lsk, newsk); |
| csk_set_flag(csk, CSK_CONN_INLINE); |
| bh_unlock_sock(newsk); /* tcp_create_openreq_child ->sk_clone_lock */ |
| |
| return newsk; |
| free_csk: |
| chtls_sock_release(&csk->kref); |
| free_dst: |
| dst_release(dst); |
| free_sk: |
| inet_csk_prepare_forced_close(newsk); |
| tcp_done(newsk); |
| free_oreq: |
| chtls_reqsk_free(oreq); |
| return NULL; |
| } |
| |
| /* |
| * Populate a TID_RELEASE WR. The skb must be already propely sized. |
| */ |
| static void mk_tid_release(struct sk_buff *skb, |
| unsigned int chan, unsigned int tid) |
| { |
| struct cpl_tid_release *req; |
| unsigned int len; |
| |
| len = roundup(sizeof(struct cpl_tid_release), 16); |
| req = (struct cpl_tid_release *)__skb_put(skb, len); |
| memset(req, 0, len); |
| set_wr_txq(skb, CPL_PRIORITY_SETUP, chan); |
| INIT_TP_WR_CPL(req, CPL_TID_RELEASE, tid); |
| } |
| |
| static int chtls_get_module(struct sock *sk) |
| { |
| struct inet_connection_sock *icsk = inet_csk(sk); |
| |
| if (!try_module_get(icsk->icsk_ulp_ops->owner)) |
| return -1; |
| |
| return 0; |
| } |
| |
| static void chtls_pass_accept_request(struct sock *sk, |
| struct sk_buff *skb) |
| { |
| struct cpl_t5_pass_accept_rpl *rpl; |
| struct cpl_pass_accept_req *req; |
| struct listen_ctx *listen_ctx; |
| struct vlan_ethhdr *vlan_eh; |
| struct request_sock *oreq; |
| struct sk_buff *reply_skb; |
| struct chtls_sock *csk; |
| struct chtls_dev *cdev; |
| struct tcphdr *tcph; |
| struct sock *newsk; |
| struct ethhdr *eh; |
| struct iphdr *iph; |
| void *network_hdr; |
| unsigned int stid; |
| unsigned int len; |
| unsigned int tid; |
| bool th_ecn, ect; |
| __u8 ip_dsfield; /* IPv4 tos or IPv6 dsfield */ |
| u16 eth_hdr_len; |
| bool ecn_ok; |
| |
| req = cplhdr(skb) + RSS_HDR; |
| tid = GET_TID(req); |
| cdev = BLOG_SKB_CB(skb)->cdev; |
| newsk = lookup_tid(cdev->tids, tid); |
| stid = PASS_OPEN_TID_G(ntohl(req->tos_stid)); |
| if (newsk) { |
| pr_info("tid (%d) already in use\n", tid); |
| return; |
| } |
| |
| len = roundup(sizeof(*rpl), 16); |
| reply_skb = alloc_skb(len, GFP_ATOMIC); |
| if (!reply_skb) { |
| cxgb4_remove_tid(cdev->tids, 0, tid, sk->sk_family); |
| kfree_skb(skb); |
| return; |
| } |
| |
| if (sk->sk_state != TCP_LISTEN) |
| goto reject; |
| |
| if (inet_csk_reqsk_queue_is_full(sk)) |
| goto reject; |
| |
| if (sk_acceptq_is_full(sk)) |
| goto reject; |
| |
| oreq = inet_reqsk_alloc(&chtls_rsk_ops, sk, true); |
| if (!oreq) |
| goto reject; |
| |
| oreq->rsk_rcv_wnd = 0; |
| oreq->rsk_window_clamp = 0; |
| oreq->cookie_ts = 0; |
| oreq->mss = 0; |
| oreq->ts_recent = 0; |
| |
| eth_hdr_len = T6_ETH_HDR_LEN_G(ntohl(req->hdr_len)); |
| if (eth_hdr_len == ETH_HLEN) { |
| eh = (struct ethhdr *)(req + 1); |
| iph = (struct iphdr *)(eh + 1); |
| network_hdr = (void *)(eh + 1); |
| } else { |
| vlan_eh = (struct vlan_ethhdr *)(req + 1); |
| iph = (struct iphdr *)(vlan_eh + 1); |
| network_hdr = (void *)(vlan_eh + 1); |
| } |
| if (iph->version != 0x4) |
| goto free_oreq; |
| |
| tcph = (struct tcphdr *)(iph + 1); |
| skb_set_network_header(skb, (void *)iph - (void *)req); |
| |
| tcp_rsk(oreq)->tfo_listener = false; |
| tcp_rsk(oreq)->rcv_isn = ntohl(tcph->seq); |
| chtls_set_req_port(oreq, tcph->source, tcph->dest); |
| chtls_set_req_addr(oreq, iph->daddr, iph->saddr); |
| ip_dsfield = ipv4_get_dsfield(iph); |
| if (req->tcpopt.wsf <= 14 && |
| sock_net(sk)->ipv4.sysctl_tcp_window_scaling) { |
| inet_rsk(oreq)->wscale_ok = 1; |
| inet_rsk(oreq)->snd_wscale = req->tcpopt.wsf; |
| } |
| inet_rsk(oreq)->ir_iif = sk->sk_bound_dev_if; |
| th_ecn = tcph->ece && tcph->cwr; |
| if (th_ecn) { |
| ect = !INET_ECN_is_not_ect(ip_dsfield); |
| ecn_ok = sock_net(sk)->ipv4.sysctl_tcp_ecn; |
| if ((!ect && ecn_ok) || tcp_ca_needs_ecn(sk)) |
| inet_rsk(oreq)->ecn_ok = 1; |
| } |
| |
| newsk = chtls_recv_sock(sk, oreq, network_hdr, req, cdev); |
| if (!newsk) |
| goto reject; |
| |
| if (chtls_get_module(newsk)) |
| goto reject; |
| inet_csk_reqsk_queue_added(sk); |
| reply_skb->sk = newsk; |
| chtls_install_cpl_ops(newsk); |
| cxgb4_insert_tid(cdev->tids, newsk, tid, newsk->sk_family); |
| csk = rcu_dereference_sk_user_data(newsk); |
| listen_ctx = (struct listen_ctx *)lookup_stid(cdev->tids, stid); |
| csk->listen_ctx = listen_ctx; |
| __skb_queue_tail(&listen_ctx->synq, (struct sk_buff *)&csk->synq); |
| chtls_pass_accept_rpl(reply_skb, req, tid); |
| kfree_skb(skb); |
| return; |
| |
| free_oreq: |
| chtls_reqsk_free(oreq); |
| reject: |
| mk_tid_release(reply_skb, 0, tid); |
| cxgb4_ofld_send(cdev->lldi->ports[0], reply_skb); |
| kfree_skb(skb); |
| } |
| |
| /* |
| * Handle a CPL_PASS_ACCEPT_REQ message. |
| */ |
| static int chtls_pass_accept_req(struct chtls_dev *cdev, struct sk_buff *skb) |
| { |
| struct cpl_pass_accept_req *req = cplhdr(skb) + RSS_HDR; |
| struct listen_ctx *ctx; |
| unsigned int stid; |
| unsigned int tid; |
| struct sock *lsk; |
| void *data; |
| |
| stid = PASS_OPEN_TID_G(ntohl(req->tos_stid)); |
| tid = GET_TID(req); |
| |
| data = lookup_stid(cdev->tids, stid); |
| if (!data) |
| return 1; |
| |
| ctx = (struct listen_ctx *)data; |
| lsk = ctx->lsk; |
| |
| if (unlikely(tid >= cdev->tids->ntids)) { |
| pr_info("passive open TID %u too large\n", tid); |
| return 1; |
| } |
| |
| BLOG_SKB_CB(skb)->cdev = cdev; |
| process_cpl_msg(chtls_pass_accept_request, lsk, skb); |
| return 0; |
| } |
| |
| /* |
| * Completes some final bits of initialization for just established connections |
| * and changes their state to TCP_ESTABLISHED. |
| * |
| * snd_isn here is the ISN after the SYN, i.e., the true ISN + 1. |
| */ |
| static void make_established(struct sock *sk, u32 snd_isn, unsigned int opt) |
| { |
| struct tcp_sock *tp = tcp_sk(sk); |
| |
| tp->pushed_seq = snd_isn; |
| tp->write_seq = snd_isn; |
| tp->snd_nxt = snd_isn; |
| tp->snd_una = snd_isn; |
| inet_sk(sk)->inet_id = tp->write_seq ^ jiffies; |
| assign_rxopt(sk, opt); |
| |
| if (tp->rcv_wnd > (RCV_BUFSIZ_M << 10)) |
| tp->rcv_wup -= tp->rcv_wnd - (RCV_BUFSIZ_M << 10); |
| |
| smp_mb(); |
| tcp_set_state(sk, TCP_ESTABLISHED); |
| } |
| |
| static void chtls_abort_conn(struct sock *sk, struct sk_buff *skb) |
| { |
| struct sk_buff *abort_skb; |
| |
| abort_skb = alloc_skb(sizeof(struct cpl_abort_req), GFP_ATOMIC); |
| if (abort_skb) |
| chtls_send_reset(sk, CPL_ABORT_SEND_RST, abort_skb); |
| } |
| |
| static struct sock *reap_list; |
| static DEFINE_SPINLOCK(reap_list_lock); |
| |
| /* |
| * Process the reap list. |
| */ |
| DECLARE_TASK_FUNC(process_reap_list, task_param) |
| { |
| spin_lock_bh(&reap_list_lock); |
| while (reap_list) { |
| struct sock *sk = reap_list; |
| struct chtls_sock *csk = rcu_dereference_sk_user_data(sk); |
| |
| reap_list = csk->passive_reap_next; |
| csk->passive_reap_next = NULL; |
| spin_unlock(&reap_list_lock); |
| sock_hold(sk); |
| |
| bh_lock_sock(sk); |
| chtls_abort_conn(sk, NULL); |
| sock_orphan(sk); |
| if (sk->sk_state == TCP_CLOSE) |
| inet_csk_destroy_sock(sk); |
| bh_unlock_sock(sk); |
| sock_put(sk); |
| spin_lock(&reap_list_lock); |
| } |
| spin_unlock_bh(&reap_list_lock); |
| } |
| |
| static DECLARE_WORK(reap_task, process_reap_list); |
| |
| static void add_to_reap_list(struct sock *sk) |
| { |
| struct chtls_sock *csk = sk->sk_user_data; |
| |
| local_bh_disable(); |
| bh_lock_sock(sk); |
| release_tcp_port(sk); /* release the port immediately */ |
| |
| spin_lock(&reap_list_lock); |
| csk->passive_reap_next = reap_list; |
| reap_list = sk; |
| if (!csk->passive_reap_next) |
| schedule_work(&reap_task); |
| spin_unlock(&reap_list_lock); |
| bh_unlock_sock(sk); |
| local_bh_enable(); |
| } |
| |
| static void add_pass_open_to_parent(struct sock *child, struct sock *lsk, |
| struct chtls_dev *cdev) |
| { |
| struct request_sock *oreq; |
| struct chtls_sock *csk; |
| |
| if (lsk->sk_state != TCP_LISTEN) |
| return; |
| |
| csk = child->sk_user_data; |
| oreq = csk->passive_reap_next; |
| csk->passive_reap_next = NULL; |
| |
| reqsk_queue_removed(&inet_csk(lsk)->icsk_accept_queue, oreq); |
| __skb_unlink((struct sk_buff *)&csk->synq, &csk->listen_ctx->synq); |
| |
| if (sk_acceptq_is_full(lsk)) { |
| chtls_reqsk_free(oreq); |
| add_to_reap_list(child); |
| } else { |
| refcount_set(&oreq->rsk_refcnt, 1); |
| inet_csk_reqsk_queue_add(lsk, oreq, child); |
| lsk->sk_data_ready(lsk); |
| } |
| } |
| |
| static void bl_add_pass_open_to_parent(struct sock *lsk, struct sk_buff *skb) |
| { |
| struct sock *child = skb->sk; |
| |
| skb->sk = NULL; |
| add_pass_open_to_parent(child, lsk, BLOG_SKB_CB(skb)->cdev); |
| kfree_skb(skb); |
| } |
| |
| static int chtls_pass_establish(struct chtls_dev *cdev, struct sk_buff *skb) |
| { |
| struct cpl_pass_establish *req = cplhdr(skb) + RSS_HDR; |
| struct chtls_sock *csk; |
| struct sock *lsk, *sk; |
| unsigned int hwtid; |
| |
| hwtid = GET_TID(req); |
| sk = lookup_tid(cdev->tids, hwtid); |
| if (!sk) |
| return (CPL_RET_UNKNOWN_TID | CPL_RET_BUF_DONE); |
| |
| bh_lock_sock(sk); |
| if (unlikely(sock_owned_by_user(sk))) { |
| kfree_skb(skb); |
| } else { |
| unsigned int stid; |
| void *data; |
| |
| csk = sk->sk_user_data; |
| csk->wr_max_credits = 64; |
| csk->wr_credits = 64; |
| csk->wr_unacked = 0; |
| make_established(sk, ntohl(req->snd_isn), ntohs(req->tcp_opt)); |
| stid = PASS_OPEN_TID_G(ntohl(req->tos_stid)); |
| sk->sk_state_change(sk); |
| if (unlikely(sk->sk_socket)) |
| sk_wake_async(sk, 0, POLL_OUT); |
| |
| data = lookup_stid(cdev->tids, stid); |
| lsk = ((struct listen_ctx *)data)->lsk; |
| |
| bh_lock_sock(lsk); |
| if (unlikely(skb_queue_empty(&csk->listen_ctx->synq))) { |
| /* removed from synq */ |
| bh_unlock_sock(lsk); |
| kfree_skb(skb); |
| goto unlock; |
| } |
| |
| if (likely(!sock_owned_by_user(lsk))) { |
| kfree_skb(skb); |
| add_pass_open_to_parent(sk, lsk, cdev); |
| } else { |
| skb->sk = sk; |
| BLOG_SKB_CB(skb)->cdev = cdev; |
| BLOG_SKB_CB(skb)->backlog_rcv = |
| bl_add_pass_open_to_parent; |
| __sk_add_backlog(lsk, skb); |
| } |
| bh_unlock_sock(lsk); |
| } |
| unlock: |
| bh_unlock_sock(sk); |
| return 0; |
| } |
| |
| /* |
| * Handle receipt of an urgent pointer. |
| */ |
| static void handle_urg_ptr(struct sock *sk, u32 urg_seq) |
| { |
| struct tcp_sock *tp = tcp_sk(sk); |
| |
| urg_seq--; |
| if (tp->urg_data && !after(urg_seq, tp->urg_seq)) |
| return; /* duplicate pointer */ |
| |
| sk_send_sigurg(sk); |
| if (tp->urg_seq == tp->copied_seq && tp->urg_data && |
| !sock_flag(sk, SOCK_URGINLINE) && |
| tp->copied_seq != tp->rcv_nxt) { |
| struct sk_buff *skb = skb_peek(&sk->sk_receive_queue); |
| |
| tp->copied_seq++; |
| if (skb && tp->copied_seq - ULP_SKB_CB(skb)->seq >= skb->len) |
| chtls_free_skb(sk, skb); |
| } |
| |
| tp->urg_data = TCP_URG_NOTYET; |
| tp->urg_seq = urg_seq; |
| } |
| |
| static void check_sk_callbacks(struct chtls_sock *csk) |
| { |
| struct sock *sk = csk->sk; |
| |
| if (unlikely(sk->sk_user_data && |
| !csk_flag_nochk(csk, CSK_CALLBACKS_CHKD))) |
| csk_set_flag(csk, CSK_CALLBACKS_CHKD); |
| } |
| |
| /* |
| * Handles Rx data that arrives in a state where the socket isn't accepting |
| * new data. |
| */ |
| static void handle_excess_rx(struct sock *sk, struct sk_buff *skb) |
| { |
| if (!csk_flag(sk, CSK_ABORT_SHUTDOWN)) |
| chtls_abort_conn(sk, skb); |
| |
| kfree_skb(skb); |
| } |
| |
| static void chtls_recv_data(struct sock *sk, struct sk_buff *skb) |
| { |
| struct cpl_rx_data *hdr = cplhdr(skb) + RSS_HDR; |
| struct chtls_sock *csk; |
| struct tcp_sock *tp; |
| |
| csk = rcu_dereference_sk_user_data(sk); |
| tp = tcp_sk(sk); |
| |
| if (unlikely(sk->sk_shutdown & RCV_SHUTDOWN)) { |
| handle_excess_rx(sk, skb); |
| return; |
| } |
| |
| ULP_SKB_CB(skb)->seq = ntohl(hdr->seq); |
| ULP_SKB_CB(skb)->psh = hdr->psh; |
| skb_ulp_mode(skb) = ULP_MODE_NONE; |
| |
| skb_reset_transport_header(skb); |
| __skb_pull(skb, sizeof(*hdr) + RSS_HDR); |
| if (!skb->data_len) |
| __skb_trim(skb, ntohs(hdr->len)); |
| |
| if (unlikely(hdr->urg)) |
| handle_urg_ptr(sk, tp->rcv_nxt + ntohs(hdr->urg)); |
| if (unlikely(tp->urg_data == TCP_URG_NOTYET && |
| tp->urg_seq - tp->rcv_nxt < skb->len)) |
| tp->urg_data = TCP_URG_VALID | |
| skb->data[tp->urg_seq - tp->rcv_nxt]; |
| |
| if (unlikely(hdr->dack_mode != csk->delack_mode)) { |
| csk->delack_mode = hdr->dack_mode; |
| csk->delack_seq = tp->rcv_nxt; |
| } |
| |
| tcp_hdr(skb)->fin = 0; |
| tp->rcv_nxt += skb->len; |
| |
| __skb_queue_tail(&sk->sk_receive_queue, skb); |
| |
| if (!sock_flag(sk, SOCK_DEAD)) { |
| check_sk_callbacks(csk); |
| sk->sk_data_ready(sk); |
| } |
| } |
| |
| static int chtls_rx_data(struct chtls_dev *cdev, struct sk_buff *skb) |
| { |
| struct cpl_rx_data *req = cplhdr(skb) + RSS_HDR; |
| unsigned int hwtid = GET_TID(req); |
| struct sock *sk; |
| |
| sk = lookup_tid(cdev->tids, hwtid); |
| if (unlikely(!sk)) { |
| pr_err("can't find conn. for hwtid %u.\n", hwtid); |
| return -EINVAL; |
| } |
| skb_dst_set(skb, NULL); |
| process_cpl_msg(chtls_recv_data, sk, skb); |
| return 0; |
| } |
| |
| static void chtls_recv_pdu(struct sock *sk, struct sk_buff *skb) |
| { |
| struct cpl_tls_data *hdr = cplhdr(skb); |
| struct chtls_sock *csk; |
| struct chtls_hws *tlsk; |
| struct tcp_sock *tp; |
| |
| csk = rcu_dereference_sk_user_data(sk); |
| tlsk = &csk->tlshws; |
| tp = tcp_sk(sk); |
| |
| if (unlikely(sk->sk_shutdown & RCV_SHUTDOWN)) { |
| handle_excess_rx(sk, skb); |
| return; |
| } |
| |
| ULP_SKB_CB(skb)->seq = ntohl(hdr->seq); |
| ULP_SKB_CB(skb)->flags = 0; |
| skb_ulp_mode(skb) = ULP_MODE_TLS; |
| |
| skb_reset_transport_header(skb); |
| __skb_pull(skb, sizeof(*hdr)); |
| if (!skb->data_len) |
| __skb_trim(skb, |
| CPL_TLS_DATA_LENGTH_G(ntohl(hdr->length_pkd))); |
| |
| if (unlikely(tp->urg_data == TCP_URG_NOTYET && tp->urg_seq - |
| tp->rcv_nxt < skb->len)) |
| tp->urg_data = TCP_URG_VALID | |
| skb->data[tp->urg_seq - tp->rcv_nxt]; |
| |
| tcp_hdr(skb)->fin = 0; |
| tlsk->pldlen = CPL_TLS_DATA_LENGTH_G(ntohl(hdr->length_pkd)); |
| __skb_queue_tail(&tlsk->sk_recv_queue, skb); |
| } |
| |
| static int chtls_rx_pdu(struct chtls_dev *cdev, struct sk_buff *skb) |
| { |
| struct cpl_tls_data *req = cplhdr(skb); |
| unsigned int hwtid = GET_TID(req); |
| struct sock *sk; |
| |
| sk = lookup_tid(cdev->tids, hwtid); |
| if (unlikely(!sk)) { |
| pr_err("can't find conn. for hwtid %u.\n", hwtid); |
| return -EINVAL; |
| } |
| skb_dst_set(skb, NULL); |
| process_cpl_msg(chtls_recv_pdu, sk, skb); |
| return 0; |
| } |
| |
| static void chtls_set_hdrlen(struct sk_buff *skb, unsigned int nlen) |
| { |
| struct tlsrx_cmp_hdr *tls_cmp_hdr = cplhdr(skb); |
| |
| skb->hdr_len = ntohs((__force __be16)tls_cmp_hdr->length); |
| tls_cmp_hdr->length = ntohs((__force __be16)nlen); |
| } |
| |
| static void chtls_rx_hdr(struct sock *sk, struct sk_buff *skb) |
| { |
| struct tlsrx_cmp_hdr *tls_hdr_pkt; |
| struct cpl_rx_tls_cmp *cmp_cpl; |
| struct sk_buff *skb_rec; |
| struct chtls_sock *csk; |
| struct chtls_hws *tlsk; |
| struct tcp_sock *tp; |
| |
| cmp_cpl = cplhdr(skb); |
| csk = rcu_dereference_sk_user_data(sk); |
| tlsk = &csk->tlshws; |
| tp = tcp_sk(sk); |
| |
| ULP_SKB_CB(skb)->seq = ntohl(cmp_cpl->seq); |
| ULP_SKB_CB(skb)->flags = 0; |
| |
| skb_reset_transport_header(skb); |
| __skb_pull(skb, sizeof(*cmp_cpl)); |
| tls_hdr_pkt = (struct tlsrx_cmp_hdr *)skb->data; |
| if (tls_hdr_pkt->res_to_mac_error & TLSRX_HDR_PKT_ERROR_M) |
| tls_hdr_pkt->type = CONTENT_TYPE_ERROR; |
| if (!skb->data_len) |
| __skb_trim(skb, TLS_HEADER_LENGTH); |
| |
| tp->rcv_nxt += |
| CPL_RX_TLS_CMP_PDULENGTH_G(ntohl(cmp_cpl->pdulength_length)); |
| |
| ULP_SKB_CB(skb)->flags |= ULPCB_FLAG_TLS_HDR; |
| skb_rec = __skb_dequeue(&tlsk->sk_recv_queue); |
| if (!skb_rec) { |
| __skb_queue_tail(&sk->sk_receive_queue, skb); |
| } else { |
| chtls_set_hdrlen(skb, tlsk->pldlen); |
| tlsk->pldlen = 0; |
| __skb_queue_tail(&sk->sk_receive_queue, skb); |
| __skb_queue_tail(&sk->sk_receive_queue, skb_rec); |
| } |
| |
| if (!sock_flag(sk, SOCK_DEAD)) { |
| check_sk_callbacks(csk); |
| sk->sk_data_ready(sk); |
| } |
| } |
| |
| static int chtls_rx_cmp(struct chtls_dev *cdev, struct sk_buff *skb) |
| { |
| struct cpl_rx_tls_cmp *req = cplhdr(skb); |
| unsigned int hwtid = GET_TID(req); |
| struct sock *sk; |
| |
| sk = lookup_tid(cdev->tids, hwtid); |
| if (unlikely(!sk)) { |
| pr_err("can't find conn. for hwtid %u.\n", hwtid); |
| return -EINVAL; |
| } |
| skb_dst_set(skb, NULL); |
| process_cpl_msg(chtls_rx_hdr, sk, skb); |
| |
| return 0; |
| } |
| |
| static void chtls_timewait(struct sock *sk) |
| { |
| struct tcp_sock *tp = tcp_sk(sk); |
| |
| tp->rcv_nxt++; |
| tp->rx_opt.ts_recent_stamp = ktime_get_seconds(); |
| tp->srtt_us = 0; |
| tcp_time_wait(sk, TCP_TIME_WAIT, 0); |
| } |
| |
| static void chtls_peer_close(struct sock *sk, struct sk_buff *skb) |
| { |
| struct chtls_sock *csk = rcu_dereference_sk_user_data(sk); |
| |
| sk->sk_shutdown |= RCV_SHUTDOWN; |
| sock_set_flag(sk, SOCK_DONE); |
| |
| switch (sk->sk_state) { |
| case TCP_SYN_RECV: |
| case TCP_ESTABLISHED: |
| tcp_set_state(sk, TCP_CLOSE_WAIT); |
| break; |
| case TCP_FIN_WAIT1: |
| tcp_set_state(sk, TCP_CLOSING); |
| break; |
| case TCP_FIN_WAIT2: |
| chtls_release_resources(sk); |
| if (csk_flag_nochk(csk, CSK_ABORT_RPL_PENDING)) |
| chtls_conn_done(sk); |
| else |
| chtls_timewait(sk); |
| break; |
| default: |
| pr_info("cpl_peer_close in bad state %d\n", sk->sk_state); |
| } |
| |
| if (!sock_flag(sk, SOCK_DEAD)) { |
| sk->sk_state_change(sk); |
| /* Do not send POLL_HUP for half duplex close. */ |
| |
| if ((sk->sk_shutdown & SEND_SHUTDOWN) || |
| sk->sk_state == TCP_CLOSE) |
| sk_wake_async(sk, SOCK_WAKE_WAITD, POLL_HUP); |
| else |
| sk_wake_async(sk, SOCK_WAKE_WAITD, POLL_IN); |
| } |
| } |
| |
| static void chtls_close_con_rpl(struct sock *sk, struct sk_buff *skb) |
| { |
| struct cpl_close_con_rpl *rpl = cplhdr(skb) + RSS_HDR; |
| struct chtls_sock *csk; |
| struct tcp_sock *tp; |
| |
| csk = rcu_dereference_sk_user_data(sk); |
| tp = tcp_sk(sk); |
| |
| tp->snd_una = ntohl(rpl->snd_nxt) - 1; /* exclude FIN */ |
| |
| switch (sk->sk_state) { |
| case TCP_CLOSING: |
| chtls_release_resources(sk); |
| if (csk_flag_nochk(csk, CSK_ABORT_RPL_PENDING)) |
| chtls_conn_done(sk); |
| else |
| chtls_timewait(sk); |
| break; |
| case TCP_LAST_ACK: |
| chtls_release_resources(sk); |
| chtls_conn_done(sk); |
| break; |
| case TCP_FIN_WAIT1: |
| tcp_set_state(sk, TCP_FIN_WAIT2); |
| sk->sk_shutdown |= SEND_SHUTDOWN; |
| |
| if (!sock_flag(sk, SOCK_DEAD)) |
| sk->sk_state_change(sk); |
| else if (tcp_sk(sk)->linger2 < 0 && |
| !csk_flag_nochk(csk, CSK_ABORT_SHUTDOWN)) |
| chtls_abort_conn(sk, skb); |
| break; |
| default: |
| pr_info("close_con_rpl in bad state %d\n", sk->sk_state); |
| } |
| kfree_skb(skb); |
| } |
| |
| static struct sk_buff *get_cpl_skb(struct sk_buff *skb, |
| size_t len, gfp_t gfp) |
| { |
| if (likely(!skb_is_nonlinear(skb) && !skb_cloned(skb))) { |
| WARN_ONCE(skb->len < len, "skb alloc error"); |
| __skb_trim(skb, len); |
| skb_get(skb); |
| } else { |
| skb = alloc_skb(len, gfp); |
| if (skb) |
| __skb_put(skb, len); |
| } |
| return skb; |
| } |
| |
| static void set_abort_rpl_wr(struct sk_buff *skb, unsigned int tid, |
| int cmd) |
| { |
| struct cpl_abort_rpl *rpl = cplhdr(skb); |
| |
| INIT_TP_WR_CPL(rpl, CPL_ABORT_RPL, tid); |
| rpl->cmd = cmd; |
| } |
| |
| static void send_defer_abort_rpl(struct chtls_dev *cdev, struct sk_buff *skb) |
| { |
| struct cpl_abort_req_rss *req = cplhdr(skb); |
| struct sk_buff *reply_skb; |
| |
| reply_skb = alloc_skb(sizeof(struct cpl_abort_rpl), |
| GFP_KERNEL | __GFP_NOFAIL); |
| __skb_put(reply_skb, sizeof(struct cpl_abort_rpl)); |
| set_abort_rpl_wr(reply_skb, GET_TID(req), |
| (req->status & CPL_ABORT_NO_RST)); |
| set_wr_txq(reply_skb, CPL_PRIORITY_DATA, req->status >> 1); |
| cxgb4_ofld_send(cdev->lldi->ports[0], reply_skb); |
| kfree_skb(skb); |
| } |
| |
| static void send_abort_rpl(struct sock *sk, struct sk_buff *skb, |
| struct chtls_dev *cdev, int status, int queue) |
| { |
| struct cpl_abort_req_rss *req = cplhdr(skb); |
| struct sk_buff *reply_skb; |
| struct chtls_sock *csk; |
| |
| csk = rcu_dereference_sk_user_data(sk); |
| |
| reply_skb = alloc_skb(sizeof(struct cpl_abort_rpl), |
| GFP_KERNEL); |
| |
| if (!reply_skb) { |
| req->status = (queue << 1); |
| send_defer_abort_rpl(cdev, skb); |
| return; |
| } |
| |
| set_abort_rpl_wr(reply_skb, GET_TID(req), status); |
| kfree_skb(skb); |
| |
| set_wr_txq(reply_skb, CPL_PRIORITY_DATA, queue); |
| if (csk_conn_inline(csk)) { |
| struct l2t_entry *e = csk->l2t_entry; |
| |
| if (e && sk->sk_state != TCP_SYN_RECV) { |
| cxgb4_l2t_send(csk->egress_dev, reply_skb, e); |
| return; |
| } |
| } |
| cxgb4_ofld_send(cdev->lldi->ports[0], reply_skb); |
| } |
| |
| /* |
| * Add an skb to the deferred skb queue for processing from process context. |
| */ |
| static void t4_defer_reply(struct sk_buff *skb, struct chtls_dev *cdev, |
| defer_handler_t handler) |
| { |
| DEFERRED_SKB_CB(skb)->handler = handler; |
| spin_lock_bh(&cdev->deferq.lock); |
| __skb_queue_tail(&cdev->deferq, skb); |
| if (skb_queue_len(&cdev->deferq) == 1) |
| schedule_work(&cdev->deferq_task); |
| spin_unlock_bh(&cdev->deferq.lock); |
| } |
| |
| static void chtls_send_abort_rpl(struct sock *sk, struct sk_buff *skb, |
| struct chtls_dev *cdev, |
| int status, int queue) |
| { |
| struct cpl_abort_req_rss *req = cplhdr(skb) + RSS_HDR; |
| struct sk_buff *reply_skb; |
| struct chtls_sock *csk; |
| unsigned int tid; |
| |
| csk = rcu_dereference_sk_user_data(sk); |
| tid = GET_TID(req); |
| |
| reply_skb = get_cpl_skb(skb, sizeof(struct cpl_abort_rpl), gfp_any()); |
| if (!reply_skb) { |
| req->status = (queue << 1) | status; |
| t4_defer_reply(skb, cdev, send_defer_abort_rpl); |
| return; |
| } |
| |
| set_abort_rpl_wr(reply_skb, tid, status); |
| set_wr_txq(reply_skb, CPL_PRIORITY_DATA, queue); |
| if (csk_conn_inline(csk)) { |
| struct l2t_entry *e = csk->l2t_entry; |
| |
| if (e && sk->sk_state != TCP_SYN_RECV) { |
| cxgb4_l2t_send(csk->egress_dev, reply_skb, e); |
| return; |
| } |
| } |
| cxgb4_ofld_send(cdev->lldi->ports[0], reply_skb); |
| kfree_skb(skb); |
| } |
| |
| /* |
| * This is run from a listener's backlog to abort a child connection in |
| * SYN_RCV state (i.e., one on the listener's SYN queue). |
| */ |
| static void bl_abort_syn_rcv(struct sock *lsk, struct sk_buff *skb) |
| { |
| struct chtls_sock *csk; |
| struct sock *child; |
| int queue; |
| |
| child = skb->sk; |
| csk = rcu_dereference_sk_user_data(child); |
| queue = csk->txq_idx; |
| |
| skb->sk = NULL; |
| do_abort_syn_rcv(child, lsk); |
| send_abort_rpl(child, skb, BLOG_SKB_CB(skb)->cdev, |
| CPL_ABORT_NO_RST, queue); |
| } |
| |
| static int abort_syn_rcv(struct sock *sk, struct sk_buff *skb) |
| { |
| const struct request_sock *oreq; |
| struct listen_ctx *listen_ctx; |
| struct chtls_sock *csk; |
| struct chtls_dev *cdev; |
| struct sock *psk; |
| void *ctx; |
| |
| csk = sk->sk_user_data; |
| oreq = csk->passive_reap_next; |
| cdev = csk->cdev; |
| |
| if (!oreq) |
| return -1; |
| |
| ctx = lookup_stid(cdev->tids, oreq->ts_recent); |
| if (!ctx) |
| return -1; |
| |
| listen_ctx = (struct listen_ctx *)ctx; |
| psk = listen_ctx->lsk; |
| |
| bh_lock_sock(psk); |
| if (!sock_owned_by_user(psk)) { |
| int queue = csk->txq_idx; |
| |
| do_abort_syn_rcv(sk, psk); |
| send_abort_rpl(sk, skb, cdev, CPL_ABORT_NO_RST, queue); |
| } else { |
| skb->sk = sk; |
| BLOG_SKB_CB(skb)->backlog_rcv = bl_abort_syn_rcv; |
| __sk_add_backlog(psk, skb); |
| } |
| bh_unlock_sock(psk); |
| return 0; |
| } |
| |
| static void chtls_abort_req_rss(struct sock *sk, struct sk_buff *skb) |
| { |
| const struct cpl_abort_req_rss *req = cplhdr(skb) + RSS_HDR; |
| struct chtls_sock *csk = sk->sk_user_data; |
| int rst_status = CPL_ABORT_NO_RST; |
| int queue = csk->txq_idx; |
| |
| if (is_neg_adv(req->status)) { |
| if (sk->sk_state == TCP_SYN_RECV) |
| chtls_set_tcb_tflag(sk, 0, 0); |
| |
| kfree_skb(skb); |
| return; |
| } |
| |
| csk_reset_flag(csk, CSK_ABORT_REQ_RCVD); |
| |
| if (!csk_flag_nochk(csk, CSK_ABORT_SHUTDOWN) && |
| !csk_flag_nochk(csk, CSK_TX_DATA_SENT)) { |
| struct tcp_sock *tp = tcp_sk(sk); |
| |
| if (send_tx_flowc_wr(sk, 0, tp->snd_nxt, tp->rcv_nxt) < 0) |
| WARN_ONCE(1, "send_tx_flowc error"); |
| csk_set_flag(csk, CSK_TX_DATA_SENT); |
| } |
| |
| csk_set_flag(csk, CSK_ABORT_SHUTDOWN); |
| |
| if (!csk_flag_nochk(csk, CSK_ABORT_RPL_PENDING)) { |
| sk->sk_err = ETIMEDOUT; |
| |
| if (!sock_flag(sk, SOCK_DEAD)) |
| sk->sk_error_report(sk); |
| |
| if (sk->sk_state == TCP_SYN_RECV && !abort_syn_rcv(sk, skb)) |
| return; |
| |
| chtls_release_resources(sk); |
| chtls_conn_done(sk); |
| } |
| |
| chtls_send_abort_rpl(sk, skb, csk->cdev, rst_status, queue); |
| } |
| |
| static void chtls_abort_rpl_rss(struct sock *sk, struct sk_buff *skb) |
| { |
| struct cpl_abort_rpl_rss *rpl = cplhdr(skb) + RSS_HDR; |
| struct chtls_sock *csk; |
| struct chtls_dev *cdev; |
| |
| csk = rcu_dereference_sk_user_data(sk); |
| cdev = csk->cdev; |
| |
| if (csk_flag_nochk(csk, CSK_ABORT_RPL_PENDING)) { |
| csk_reset_flag(csk, CSK_ABORT_RPL_PENDING); |
| if (!csk_flag_nochk(csk, CSK_ABORT_REQ_RCVD)) { |
| if (sk->sk_state == TCP_SYN_SENT) { |
| cxgb4_remove_tid(cdev->tids, |
| csk->port_id, |
| GET_TID(rpl), |
| sk->sk_family); |
| sock_put(sk); |
| } |
| chtls_release_resources(sk); |
| chtls_conn_done(sk); |
| } |
| } |
| kfree_skb(skb); |
| } |
| |
| static int chtls_conn_cpl(struct chtls_dev *cdev, struct sk_buff *skb) |
| { |
| struct cpl_peer_close *req = cplhdr(skb) + RSS_HDR; |
| void (*fn)(struct sock *sk, struct sk_buff *skb); |
| unsigned int hwtid = GET_TID(req); |
| struct sock *sk; |
| u8 opcode; |
| |
| opcode = ((const struct rss_header *)cplhdr(skb))->opcode; |
| |
| sk = lookup_tid(cdev->tids, hwtid); |
| if (!sk) |
| goto rel_skb; |
| |
| switch (opcode) { |
| case CPL_PEER_CLOSE: |
| fn = chtls_peer_close; |
| break; |
| case CPL_CLOSE_CON_RPL: |
| fn = chtls_close_con_rpl; |
| break; |
| case CPL_ABORT_REQ_RSS: |
| fn = chtls_abort_req_rss; |
| break; |
| case CPL_ABORT_RPL_RSS: |
| fn = chtls_abort_rpl_rss; |
| break; |
| default: |
| goto rel_skb; |
| } |
| |
| process_cpl_msg(fn, sk, skb); |
| return 0; |
| |
| rel_skb: |
| kfree_skb(skb); |
| return 0; |
| } |
| |
| static struct sk_buff *dequeue_wr(struct sock *sk) |
| { |
| struct chtls_sock *csk = rcu_dereference_sk_user_data(sk); |
| struct sk_buff *skb = csk->wr_skb_head; |
| |
| if (likely(skb)) { |
| /* Don't bother clearing the tail */ |
| csk->wr_skb_head = WR_SKB_CB(skb)->next_wr; |
| WR_SKB_CB(skb)->next_wr = NULL; |
| } |
| return skb; |
| } |
| |
| static void chtls_rx_ack(struct sock *sk, struct sk_buff *skb) |
| { |
| struct cpl_fw4_ack *hdr = cplhdr(skb) + RSS_HDR; |
| struct chtls_sock *csk = sk->sk_user_data; |
| struct tcp_sock *tp = tcp_sk(sk); |
| u32 credits = hdr->credits; |
| u32 snd_una; |
| |
| snd_una = ntohl(hdr->snd_una); |
| csk->wr_credits += credits; |
| |
| if (csk->wr_unacked > csk->wr_max_credits - csk->wr_credits) |
| csk->wr_unacked = csk->wr_max_credits - csk->wr_credits; |
| |
| while (credits) { |
| struct sk_buff *pskb = csk->wr_skb_head; |
| u32 csum; |
| |
| if (unlikely(!pskb)) { |
| if (csk->wr_nondata) |
| csk->wr_nondata -= credits; |
| break; |
| } |
| csum = (__force u32)pskb->csum; |
| if (unlikely(credits < csum)) { |
| pskb->csum = (__force __wsum)(csum - credits); |
| break; |
| } |
| dequeue_wr(sk); |
| credits -= csum; |
| kfree_skb(pskb); |
| } |
| if (hdr->seq_vld & CPL_FW4_ACK_FLAGS_SEQVAL) { |
| if (unlikely(before(snd_una, tp->snd_una))) { |
| kfree_skb(skb); |
| return; |
| } |
| |
| if (tp->snd_una != snd_una) { |
| tp->snd_una = snd_una; |
| tp->rcv_tstamp = tcp_time_stamp(tp); |
| if (tp->snd_una == tp->snd_nxt && |
| !csk_flag_nochk(csk, CSK_TX_FAILOVER)) |
| csk_reset_flag(csk, CSK_TX_WAIT_IDLE); |
| } |
| } |
| |
| if (hdr->seq_vld & CPL_FW4_ACK_FLAGS_CH) { |
| unsigned int fclen16 = roundup(failover_flowc_wr_len, 16); |
| |
| csk->wr_credits -= fclen16; |
| csk_reset_flag(csk, CSK_TX_WAIT_IDLE); |
| csk_reset_flag(csk, CSK_TX_FAILOVER); |
| } |
| if (skb_queue_len(&csk->txq) && chtls_push_frames(csk, 0)) |
| sk->sk_write_space(sk); |
| |
| kfree_skb(skb); |
| } |
| |
| static int chtls_wr_ack(struct chtls_dev *cdev, struct sk_buff *skb) |
| { |
| struct cpl_fw4_ack *rpl = cplhdr(skb) + RSS_HDR; |
| unsigned int hwtid = GET_TID(rpl); |
| struct sock *sk; |
| |
| sk = lookup_tid(cdev->tids, hwtid); |
| if (unlikely(!sk)) { |
| pr_err("can't find conn. for hwtid %u.\n", hwtid); |
| return -EINVAL; |
| } |
| process_cpl_msg(chtls_rx_ack, sk, skb); |
| |
| return 0; |
| } |
| |
| chtls_handler_func chtls_handlers[NUM_CPL_CMDS] = { |
| [CPL_PASS_OPEN_RPL] = chtls_pass_open_rpl, |
| [CPL_CLOSE_LISTSRV_RPL] = chtls_close_listsrv_rpl, |
| [CPL_PASS_ACCEPT_REQ] = chtls_pass_accept_req, |
| [CPL_PASS_ESTABLISH] = chtls_pass_establish, |
| [CPL_RX_DATA] = chtls_rx_data, |
| [CPL_TLS_DATA] = chtls_rx_pdu, |
| [CPL_RX_TLS_CMP] = chtls_rx_cmp, |
| [CPL_PEER_CLOSE] = chtls_conn_cpl, |
| [CPL_CLOSE_CON_RPL] = chtls_conn_cpl, |
| [CPL_ABORT_REQ_RSS] = chtls_conn_cpl, |
| [CPL_ABORT_RPL_RSS] = chtls_conn_cpl, |
| [CPL_FW4_ACK] = chtls_wr_ack, |
| }; |