diff options
Diffstat (limited to 'drivers/crypto/chelsio/chtls/chtls_cm.c')
| -rw-r--r-- | drivers/crypto/chelsio/chtls/chtls_cm.c | 2327 |
1 files changed, 0 insertions, 2327 deletions
diff --git a/drivers/crypto/chelsio/chtls/chtls_cm.c b/drivers/crypto/chelsio/chtls/chtls_cm.c deleted file mode 100644 index 05520dccd906..000000000000 --- a/drivers/crypto/chelsio/chtls/chtls_cm.c +++ /dev/null @@ -1,2327 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * Copyright (c) 2018 Chelsio Communications, Inc. - * - * 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 <linux/ipv6.h> -#include <net/ipv6.h> -#include <net/transp_v6.h> -#include <net/ip6_route.h> -#include <net/inet_common.h> -#include <net/tcp.h> -#include <net/dst.h> -#include <net/tls.h> -#include <net/addrconf.h> -#include <net/secure_seq.h> - -#include "chtls.h" -#include "chtls_cm.h" -#include "clip_tbl.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_find_netdev(struct chtls_dev *cdev, - struct sock *sk) -{ - struct net_device *ndev = cdev->ports[0]; -#if IS_ENABLED(CONFIG_IPV6) - struct net_device *temp; - int addr_type; -#endif - - switch (sk->sk_family) { - case PF_INET: - if (likely(!inet_sk(sk)->inet_rcv_saddr)) - return ndev; - ndev = __ip_dev_find(&init_net, inet_sk(sk)->inet_rcv_saddr, false); - break; -#if IS_ENABLED(CONFIG_IPV6) - case PF_INET6: - addr_type = ipv6_addr_type(&sk->sk_v6_rcv_saddr); - if (likely(addr_type == IPV6_ADDR_ANY)) - return ndev; - - for_each_netdev_rcu(&init_net, temp) { - if (ipv6_chk_addr(&init_net, (struct in6_addr *) - &sk->sk_v6_rcv_saddr, temp, 1)) { - ndev = temp; - break; - } - } - break; -#endif - default: - return NULL; - } - - 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); - csk->cdev = NULL; - if (sk->sk_family == AF_INET) - sk->sk_prot = &tcp_prot; -#if IS_ENABLED(CONFIG_IPV6) - else - sk->sk_prot = &tcpv6_prot; -#endif - 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 || - req->rsk_ops == &chtls_rsk_opsv6) { - 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; -#if IS_ENABLED(CONFIG_IPV6) - bool clip_valid = false; -#endif - struct listen_ctx *ctx; - struct adapter *adap; - struct port_info *pi; - int ret = 0; - int stid; - - rcu_read_lock(); - ndev = chtls_find_netdev(cdev, sk); - rcu_read_unlock(); - if (!ndev) - return -EBADF; - - pi = netdev_priv(ndev); - adap = pi->adapter; - if (!(adap->flags & CXGB4_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; - - if (sk->sk_family == PF_INET) { - ret = cxgb4_create_server(ndev, stid, - inet_sk(sk)->inet_rcv_saddr, - inet_sk(sk)->inet_sport, 0, - cdev->lldi->rxq_ids[0]); -#if IS_ENABLED(CONFIG_IPV6) - } else { - int addr_type; - - addr_type = ipv6_addr_type(&sk->sk_v6_rcv_saddr); - if (addr_type != IPV6_ADDR_ANY) { - ret = cxgb4_clip_get(ndev, (const u32 *) - &sk->sk_v6_rcv_saddr, 1); - if (ret) - goto del_hash; - clip_valid = true; - } - ret = cxgb4_create_server6(ndev, stid, - &sk->sk_v6_rcv_saddr, - inet_sk(sk)->inet_sport, - cdev->lldi->rxq_ids[0]); -#endif - } - if (ret > 0) - ret = net_xmit_errno(ret); - if (ret) - goto del_hash; - return 0; -del_hash: -#if IS_ENABLED(CONFIG_IPV6) - if (clip_valid) - cxgb4_clip_release(ndev, (const u32 *)&sk->sk_v6_rcv_saddr, 1); -#endif - 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], sk->sk_family == PF_INET6); - -#if IS_ENABLED(CONFIG_IPV6) - if (sk->sk_family == PF_INET6) { - struct chtls_sock *csk; - int addr_type = 0; - - csk = rcu_dereference_sk_user_data(sk); - addr_type = ipv6_addr_type((const struct in6_addr *) - &sk->sk_v6_rcv_saddr); - if (addr_type != IPV6_ADDR_ANY) - cxgb4_clip_release(csk->egress_dev, (const u32 *) - &sk->sk_v6_rcv_saddr, 1); - } -#endif - 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_purge_wr_queue(struct sock *sk) -{ - struct sk_buff *skb; - - while ((skb = dequeue_wr(sk)) != NULL) - kfree_skb(skb); -} - -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->wr_credits != csk->wr_max_credits) { - chtls_purge_wr_queue(sk); - chtls_reset_wr_list(csk); - } - - if (csk->l2t_entry) { - cxgb4_l2t_release(csk->l2t_entry); - csk->l2t_entry = NULL; - } - - if (sk->sk_state != TCP_SYN_SENT) { - 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; - -#if IS_ENABLED(CONFIG_IPV6) - if (sk->sk_family == AF_INET6) - iphdrsz = sizeof(struct ipv6hdr) + sizeof(struct tcphdr); - else -#endif - 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; - opt2 |= WND_SCALE_EN_V(WSCALE_OK(tp)); - 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 neighbour *n = NULL; - struct inet_sock *newinet; - const struct iphdr *iph; - struct tls_context *ctx; - struct net_device *ndev; - struct chtls_sock *csk; - struct dst_entry *dst; - 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; - - if (lsk->sk_family == AF_INET) { - dst = inet_csk_route_child_sock(lsk, newsk, oreq); - if (!dst) - goto free_sk; - - n = dst_neigh_lookup(dst, &iph->saddr); -#if IS_ENABLED(CONFIG_IPV6) - } else { - const struct ipv6hdr *ip6h; - struct flowi6 fl6; - - ip6h = (const struct ipv6hdr *)network_hdr; - memset(&fl6, 0, sizeof(fl6)); - fl6.flowi6_proto = IPPROTO_TCP; - fl6.saddr = ip6h->daddr; - fl6.daddr = ip6h->saddr; - fl6.fl6_dport = inet_rsk(oreq)->ir_rmt_port; - fl6.fl6_sport = htons(inet_rsk(oreq)->ir_num); - security_req_classify_flow(oreq, flowi6_to_flowi(&fl6)); - dst = ip6_dst_lookup_flow(sock_net(lsk), lsk, &fl6, NULL); - if (IS_ERR(dst)) - goto free_sk; - n = dst_neigh_lookup(dst, &ip6h->saddr); -#endif - } - 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); - - if (iph->version == 0x4) { - newinet->inet_daddr = iph->saddr; - newinet->inet_rcv_saddr = iph->daddr; - newinet->inet_saddr = iph->daddr; -#if IS_ENABLED(CONFIG_IPV6) - } else { - struct tcp6_sock *newtcp6sk = (struct tcp6_sock *)newsk; - struct inet_request_sock *treq = inet_rsk(oreq); - struct ipv6_pinfo *newnp = inet6_sk(newsk); - struct ipv6_pinfo *np = inet6_sk(lsk); - - inet_sk(newsk)->pinet6 = &newtcp6sk->inet6; - memcpy(newnp, np, sizeof(struct ipv6_pinfo)); - newsk->sk_v6_daddr = treq->ir_v6_rmt_addr; - newsk->sk_v6_rcv_saddr = treq->ir_v6_loc_addr; - inet6_sk(newsk)->saddr = treq->ir_v6_loc_addr; - newnp->ipv6_fl_list = NULL; - newnp->pktoptions = NULL; - newsk->sk_bound_dev_if = treq->ir_iif; - newinet->inet_opt = NULL; - newinet->inet_daddr = LOOPBACK4_IPV6; - newinet->inet_saddr = LOOPBACK4_IPV6; -#endif - } - - oreq->ts_recent = PASS_OPEN_TID_G(ntohl(req->tos_stid)); - sk_setup_caps(newsk, dst); - ctx = tls_get_ctx(lsk); - newsk->sk_destruct = ctx->sk_destruct; - 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 ipv6hdr *ip6h; - 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; - - - 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); - ip6h = (struct ipv6hdr *)(eh + 1); - network_hdr = (void *)(eh + 1); - } else { - vlan_eh = (struct vlan_ethhdr *)(req + 1); - iph = (struct iphdr *)(vlan_eh + 1); - ip6h = (struct ipv6hdr *)(vlan_eh + 1); - network_hdr = (void *)(vlan_eh + 1); - } - - if (iph->version == 0x4) { - tcph = (struct tcphdr *)(iph + 1); - skb_set_network_header(skb, (void *)iph - (void *)req); - oreq = inet_reqsk_alloc(&chtls_rsk_ops, sk, true); - } else { - tcph = (struct tcphdr *)(ip6h + 1); - skb_set_network_header(skb, (void *)ip6h - (void *)req); - oreq = inet_reqsk_alloc(&chtls_rsk_opsv6, sk, false); - } - - if (!oreq) - goto reject; - - oreq->rsk_rcv_wnd = 0; - oreq->rsk_window_clamp = 0; - oreq->syncookie = 0; - oreq->mss = 0; - oreq->ts_recent = 0; - - tcp_rsk(oreq)->tfo_listener = false; - tcp_rsk(oreq)->rcv_isn = ntohl(tcph->seq); - chtls_set_req_port(oreq, tcph->source, tcph->dest); - if (iph->version == 0x4) { - chtls_set_req_addr(oreq, iph->daddr, iph->saddr); - ip_dsfield = ipv4_get_dsfield(iph); -#if IS_ENABLED(CONFIG_IPV6) - } else { - inet_rsk(oreq)->ir_v6_rmt_addr = ipv6_hdr(skb)->saddr; - inet_rsk(oreq)->ir_v6_loc_addr = ipv6_hdr(skb)->daddr; - ip_dsfield = ipv6_get_dsfield(ipv6_hdr(skb)); -#endif - } - 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 free_oreq; - - 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_out_of_range(cdev->tids, tid))) { - 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 = prandom_u32(); - 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); - - if (csk_flag_nochk(csk, CSK_ABORT_RPL_PENDING)) - goto out; - - 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); - } -out: - kfree_skb(skb); -} - -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); - - if (csk_flag_nochk(csk, CSK_ABORT_RPL_PENDING)) - goto out; - - 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); - } -out: - 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); -} - -/* - * 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 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); - t4_defer_reply(skb, cdev, send_defer_abort_rpl); - 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); -} - -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); - 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); -} - -/* - * 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, BLOG_SKB_CB(skb)->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 chtls_sock *csk; - struct sock *sk; - u8 opcode; - - opcode = ((const struct rss_header *)cplhdr(skb))->opcode; - - sk = lookup_tid(cdev->tids, hwtid); - if (!sk) - goto rel_skb; - - csk = sk->sk_user_data; - - 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: - /* - * Save the offload device in the skb, we may process this - * message after the socket has closed. - */ - BLOG_SKB_CB(skb)->cdev = csk->cdev; - 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 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, -}; |