diff options
Diffstat (limited to 'net/dccp')
-rw-r--r-- | net/dccp/dccp.h | 16 | ||||
-rw-r--r-- | net/dccp/ipv4.c | 94 | ||||
-rw-r--r-- | net/dccp/ipv6.c | 142 | ||||
-rw-r--r-- | net/dccp/minisocks.c | 18 | ||||
-rw-r--r-- | net/dccp/output.c | 17 | ||||
-rw-r--r-- | net/dccp/probe.c | 11 | ||||
-rw-r--r-- | net/dccp/proto.c | 3 |
7 files changed, 126 insertions, 175 deletions
diff --git a/net/dccp/dccp.h b/net/dccp/dccp.h index bebc735f5..b0e28d24e 100644 --- a/net/dccp/dccp.h +++ b/net/dccp/dccp.h @@ -229,7 +229,7 @@ void dccp_v4_send_check(struct sock *sk, struct sk_buff *skb); int dccp_retransmit_skb(struct sock *sk); void dccp_send_ack(struct sock *sk); -void dccp_reqsk_send_ack(struct sock *sk, struct sk_buff *skb, +void dccp_reqsk_send_ack(const struct sock *sk, struct sk_buff *skb, struct request_sock *rsk); void dccp_send_sync(struct sock *sk, const u64 seq, @@ -270,15 +270,17 @@ int dccp_reqsk_init(struct request_sock *rq, struct dccp_sock const *dp, int dccp_v4_conn_request(struct sock *sk, struct sk_buff *skb); -struct sock *dccp_create_openreq_child(struct sock *sk, +struct sock *dccp_create_openreq_child(const struct sock *sk, const struct request_sock *req, const struct sk_buff *skb); int dccp_v4_do_rcv(struct sock *sk, struct sk_buff *skb); -struct sock *dccp_v4_request_recv_sock(struct sock *sk, struct sk_buff *skb, +struct sock *dccp_v4_request_recv_sock(const struct sock *sk, struct sk_buff *skb, struct request_sock *req, - struct dst_entry *dst); + struct dst_entry *dst, + struct request_sock *req_unhash, + bool *own_req); struct sock *dccp_check_req(struct sock *sk, struct sk_buff *skb, struct request_sock *req); @@ -293,7 +295,7 @@ int dccp_init_sock(struct sock *sk, const __u8 ctl_sock_initialized); void dccp_destroy_sock(struct sock *sk); void dccp_close(struct sock *sk, long timeout); -struct sk_buff *dccp_make_response(struct sock *sk, struct dst_entry *dst, +struct sk_buff *dccp_make_response(const struct sock *sk, struct dst_entry *dst, struct request_sock *req); int dccp_connect(struct sock *sk); @@ -325,13 +327,13 @@ void dccp_send_close(struct sock *sk, const int active); int dccp_invalid_packet(struct sk_buff *skb); u32 dccp_sample_rtt(struct sock *sk, long delta); -static inline int dccp_bad_service_code(const struct sock *sk, +static inline bool dccp_bad_service_code(const struct sock *sk, const __be32 service) { const struct dccp_sock *dp = dccp_sk(sk); if (dp->dccps_service == service) - return 0; + return false; return !dccp_list_has_service(dp->dccps_service_list, service); } diff --git a/net/dccp/ipv4.c b/net/dccp/ipv4.c index ccf4c5629..5684e1493 100644 --- a/net/dccp/ipv4.c +++ b/net/dccp/ipv4.c @@ -208,7 +208,6 @@ void dccp_req_err(struct sock *sk, u64 seq) if (!between48(seq, dccp_rsk(req)->dreq_iss, dccp_rsk(req)->dreq_gss)) { NET_INC_STATS_BH(net, LINUX_MIB_OUTOFWINDOWICMPS); - reqsk_put(req); } else { /* * Still in RESPOND, just remove it silently. @@ -218,6 +217,7 @@ void dccp_req_err(struct sock *sk, u64 seq) */ inet_csk_reqsk_queue_drop(req->rsk_listener, req); } + reqsk_put(req); } EXPORT_SYMBOL(dccp_req_err); @@ -390,9 +390,12 @@ static inline u64 dccp_v4_init_sequence(const struct sk_buff *skb) * * This is the equivalent of TCP's tcp_v4_syn_recv_sock */ -struct sock *dccp_v4_request_recv_sock(struct sock *sk, struct sk_buff *skb, +struct sock *dccp_v4_request_recv_sock(const struct sock *sk, + struct sk_buff *skb, struct request_sock *req, - struct dst_entry *dst) + struct dst_entry *dst, + struct request_sock *req_unhash, + bool *own_req) { struct inet_request_sock *ireq; struct inet_sock *newinet; @@ -425,7 +428,7 @@ struct sock *dccp_v4_request_recv_sock(struct sock *sk, struct sk_buff *skb, if (__inet_inherit_port(sk, newsk) < 0) goto put_and_exit; - __inet_hash_nolisten(newsk, NULL); + *own_req = inet_ehash_nolisten(newsk, req_to_sk(req_unhash)); return newsk; @@ -443,36 +446,6 @@ put_and_exit: } EXPORT_SYMBOL_GPL(dccp_v4_request_recv_sock); -static struct sock *dccp_v4_hnd_req(struct sock *sk, struct sk_buff *skb) -{ - const struct dccp_hdr *dh = dccp_hdr(skb); - const struct iphdr *iph = ip_hdr(skb); - struct sock *nsk; - /* Find possible connection requests. */ - struct request_sock *req = inet_csk_search_req(sk, dh->dccph_sport, - iph->saddr, iph->daddr); - if (req) { - nsk = dccp_check_req(sk, skb, req); - if (!nsk) - reqsk_put(req); - return nsk; - } - nsk = inet_lookup_established(sock_net(sk), &dccp_hashinfo, - iph->saddr, dh->dccph_sport, - iph->daddr, dh->dccph_dport, - inet_iif(skb)); - if (nsk != NULL) { - if (nsk->sk_state != DCCP_TIME_WAIT) { - bh_lock_sock(nsk); - return nsk; - } - inet_twsk_put(inet_twsk(nsk)); - return NULL; - } - - return sk; -} - static struct dst_entry* dccp_v4_route_skb(struct net *net, struct sock *sk, struct sk_buff *skb) { @@ -498,7 +471,7 @@ static struct dst_entry* dccp_v4_route_skb(struct net *net, struct sock *sk, return &rt->dst; } -static int dccp_v4_send_response(struct sock *sk, struct request_sock *req) +static int dccp_v4_send_response(const struct sock *sk, struct request_sock *req) { int err = -1; struct sk_buff *skb; @@ -527,7 +500,7 @@ out: return err; } -static void dccp_v4_ctl_send_reset(struct sock *sk, struct sk_buff *rxskb) +static void dccp_v4_ctl_send_reset(const struct sock *sk, struct sk_buff *rxskb) { int err; const struct iphdr *rxiph; @@ -624,7 +597,7 @@ int dccp_v4_conn_request(struct sock *sk, struct sk_buff *skb) if (sk_acceptq_is_full(sk) && inet_csk_reqsk_queue_young(sk) > 1) goto drop; - req = inet_reqsk_alloc(&dccp_request_sock_ops, sk); + req = inet_reqsk_alloc(&dccp_request_sock_ops, sk, true); if (req == NULL) goto drop; @@ -704,18 +677,6 @@ int dccp_v4_do_rcv(struct sock *sk, struct sk_buff *skb) * NOTE: the check for the packet types is done in * dccp_rcv_state_process */ - if (sk->sk_state == DCCP_LISTEN) { - struct sock *nsk = dccp_v4_hnd_req(sk, skb); - - if (nsk == NULL) - goto discard; - - if (nsk != sk) { - if (dccp_child_process(sk, nsk, skb)) - goto reset; - return 0; - } - } if (dccp_rcv_state_process(sk, skb, dh, skb->len)) goto reset; @@ -723,7 +684,6 @@ int dccp_v4_do_rcv(struct sock *sk, struct sk_buff *skb) reset: dccp_v4_ctl_send_reset(sk, skb); -discard: kfree_skb(skb); return 0; } @@ -841,15 +801,10 @@ static int dccp_v4_rcv(struct sk_buff *skb) DCCP_SKB_CB(skb)->dccpd_ack_seq); } - /* Step 2: - * Look up flow ID in table and get corresponding socket */ +lookup: sk = __inet_lookup_skb(&dccp_hashinfo, skb, dh->dccph_sport, dh->dccph_dport); - /* - * Step 2: - * If no socket ... - */ - if (sk == NULL) { + if (!sk) { dccp_pr_debug("failed to look up flow ID in table and " "get corresponding socket\n"); goto no_dccp_socket; @@ -867,6 +822,31 @@ static int dccp_v4_rcv(struct sk_buff *skb) goto no_dccp_socket; } + if (sk->sk_state == DCCP_NEW_SYN_RECV) { + struct request_sock *req = inet_reqsk(sk); + struct sock *nsk = NULL; + + sk = req->rsk_listener; + if (likely(sk->sk_state == DCCP_LISTEN)) { + nsk = dccp_check_req(sk, skb, req); + } else { + inet_csk_reqsk_queue_drop_and_put(sk, req); + goto lookup; + } + if (!nsk) { + reqsk_put(req); + goto discard_it; + } + if (nsk == sk) { + sock_hold(sk); + reqsk_put(req); + } else if (dccp_child_process(sk, nsk, skb)) { + dccp_v4_ctl_send_reset(sk, skb); + goto discard_it; + } else { + return 0; + } + } /* * RFC 4340, sec. 9.2.1: Minimum Checksum Coverage * o if MinCsCov = 0, only packets with CsCov = 0 are accepted diff --git a/net/dccp/ipv6.c b/net/dccp/ipv6.c index a0490508d..9c6d0508e 100644 --- a/net/dccp/ipv6.c +++ b/net/dccp/ipv6.c @@ -181,7 +181,7 @@ out: } -static int dccp_v6_send_response(struct sock *sk, struct request_sock *req) +static int dccp_v6_send_response(const struct sock *sk, struct request_sock *req) { struct inet_request_sock *ireq = inet_rsk(req); struct ipv6_pinfo *np = inet6_sk(sk); @@ -239,7 +239,7 @@ static void dccp_v6_reqsk_destructor(struct request_sock *req) kfree_skb(inet_rsk(req)->pktopts); } -static void dccp_v6_ctl_send_reset(struct sock *sk, struct sk_buff *rxskb) +static void dccp_v6_ctl_send_reset(const struct sock *sk, struct sk_buff *rxskb) { const struct ipv6hdr *rxip6h; struct sk_buff *skb; @@ -295,37 +295,6 @@ static struct request_sock_ops dccp6_request_sock_ops = { .syn_ack_timeout = dccp_syn_ack_timeout, }; -static struct sock *dccp_v6_hnd_req(struct sock *sk,struct sk_buff *skb) -{ - const struct dccp_hdr *dh = dccp_hdr(skb); - const struct ipv6hdr *iph = ipv6_hdr(skb); - struct request_sock *req; - struct sock *nsk; - - req = inet6_csk_search_req(sk, dh->dccph_sport, &iph->saddr, - &iph->daddr, inet6_iif(skb)); - if (req) { - nsk = dccp_check_req(sk, skb, req); - if (!nsk) - reqsk_put(req); - return nsk; - } - nsk = __inet6_lookup_established(sock_net(sk), &dccp_hashinfo, - &iph->saddr, dh->dccph_sport, - &iph->daddr, ntohs(dh->dccph_dport), - inet6_iif(skb)); - if (nsk != NULL) { - if (nsk->sk_state != DCCP_TIME_WAIT) { - bh_lock_sock(nsk); - return nsk; - } - inet_twsk_put(inet_twsk(nsk)); - return NULL; - } - - return sk; -} - static int dccp_v6_conn_request(struct sock *sk, struct sk_buff *skb) { struct request_sock *req; @@ -355,7 +324,7 @@ static int dccp_v6_conn_request(struct sock *sk, struct sk_buff *skb) if (sk_acceptq_is_full(sk) && inet_csk_reqsk_queue_young(sk) > 1) goto drop; - req = inet_reqsk_alloc(&dccp6_request_sock_ops, sk); + req = inet_reqsk_alloc(&dccp6_request_sock_ops, sk, true); if (req == NULL) goto drop; @@ -403,7 +372,7 @@ static int dccp_v6_conn_request(struct sock *sk, struct sk_buff *skb) if (dccp_v6_send_response(sk, req)) goto drop_and_free; - inet6_csk_reqsk_queue_hash_add(sk, req, DCCP_TIMEOUT_INIT); + inet_csk_reqsk_queue_hash_add(sk, req, DCCP_TIMEOUT_INIT); return 0; drop_and_free: @@ -413,13 +382,16 @@ drop: return -1; } -static struct sock *dccp_v6_request_recv_sock(struct sock *sk, +static struct sock *dccp_v6_request_recv_sock(const struct sock *sk, struct sk_buff *skb, struct request_sock *req, - struct dst_entry *dst) + struct dst_entry *dst, + struct request_sock *req_unhash, + bool *own_req) { struct inet_request_sock *ireq = inet_rsk(req); - struct ipv6_pinfo *newnp, *np = inet6_sk(sk); + struct ipv6_pinfo *newnp; + const struct ipv6_pinfo *np = inet6_sk(sk); struct ipv6_txoptions *opt; struct inet_sock *newinet; struct dccp6_sock *newdp6; @@ -429,7 +401,8 @@ static struct sock *dccp_v6_request_recv_sock(struct sock *sk, /* * v6 mapped */ - newsk = dccp_v4_request_recv_sock(sk, skb, req, dst); + newsk = dccp_v4_request_recv_sock(sk, skb, req, dst, + req_unhash, own_req); if (newsk == NULL) return NULL; @@ -468,22 +441,11 @@ static struct sock *dccp_v6_request_recv_sock(struct sock *sk, if (sk_acceptq_is_full(sk)) goto out_overflow; - if (dst == NULL) { - struct in6_addr *final_p, final; + if (!dst) { struct flowi6 fl6; - memset(&fl6, 0, sizeof(fl6)); - fl6.flowi6_proto = IPPROTO_DCCP; - fl6.daddr = ireq->ir_v6_rmt_addr; - final_p = fl6_update_dst(&fl6, np->opt, &final); - fl6.saddr = ireq->ir_v6_loc_addr; - fl6.flowi6_oif = sk->sk_bound_dev_if; - fl6.fl6_dport = ireq->ir_rmt_port; - fl6.fl6_sport = htons(ireq->ir_num); - security_sk_classify_flow(sk, flowi6_to_flowi(&fl6)); - - dst = ip6_dst_lookup_flow(sk, &fl6, final_p); - if (IS_ERR(dst)) + dst = inet6_csk_route_req(sk, &fl6, req, IPPROTO_DCCP); + if (!dst) goto out; } @@ -497,7 +459,7 @@ static struct sock *dccp_v6_request_recv_sock(struct sock *sk, * comment in that function for the gory details. -acme */ - __ip6_dst_store(newsk, dst, NULL, NULL); + ip6_dst_store(newsk, dst, NULL, NULL); newsk->sk_route_caps = dst->dev->features & ~(NETIF_F_IP_CSUM | NETIF_F_TSO); newdp6 = (struct dccp6_sock *)newsk; @@ -521,15 +483,7 @@ static struct sock *dccp_v6_request_recv_sock(struct sock *sk, /* Clone RX bits */ newnp->rxopt.all = np->rxopt.all; - /* Clone pktoptions received with SYN */ newnp->pktoptions = NULL; - if (ireq->pktopts != NULL) { - newnp->pktoptions = skb_clone(ireq->pktopts, GFP_ATOMIC); - consume_skb(ireq->pktopts); - ireq->pktopts = NULL; - if (newnp->pktoptions) - skb_set_owner_r(newnp->pktoptions, newsk); - } newnp->opt = NULL; newnp->mcast_oif = inet6_iif(skb); newnp->mcast_hops = ipv6_hdr(skb)->hop_limit; @@ -560,7 +514,15 @@ static struct sock *dccp_v6_request_recv_sock(struct sock *sk, dccp_done(newsk); goto out; } - __inet_hash(newsk, NULL); + *own_req = inet_ehash_nolisten(newsk, req_to_sk(req_unhash)); + /* Clone pktoptions received with SYN, if we own the req */ + if (*own_req && ireq->pktopts) { + newnp->pktoptions = skb_clone(ireq->pktopts, GFP_ATOMIC); + consume_skb(ireq->pktopts); + ireq->pktopts = NULL; + if (newnp->pktoptions) + skb_set_owner_r(newnp->pktoptions, newsk); + } return newsk; @@ -659,24 +621,6 @@ static int dccp_v6_do_rcv(struct sock *sk, struct sk_buff *skb) * NOTE: the check for the packet types is done in * dccp_rcv_state_process */ - if (sk->sk_state == DCCP_LISTEN) { - struct sock *nsk = dccp_v6_hnd_req(sk, skb); - - if (nsk == NULL) - goto discard; - /* - * Queue it on the new socket if the new socket is active, - * otherwise we just shortcircuit this and continue with - * the new socket.. - */ - if (nsk != sk) { - if (dccp_child_process(sk, nsk, skb)) - goto reset; - if (opt_skb != NULL) - __kfree_skb(opt_skb); - return 0; - } - } if (dccp_rcv_state_process(sk, skb, dccp_hdr(skb), skb->len)) goto reset; @@ -723,16 +667,11 @@ static int dccp_v6_rcv(struct sk_buff *skb) else DCCP_SKB_CB(skb)->dccpd_ack_seq = dccp_hdr_ack_seq(skb); - /* Step 2: - * Look up flow ID in table and get corresponding socket */ +lookup: sk = __inet6_lookup_skb(&dccp_hashinfo, skb, dh->dccph_sport, dh->dccph_dport, inet6_iif(skb)); - /* - * Step 2: - * If no socket ... - */ - if (sk == NULL) { + if (!sk) { dccp_pr_debug("failed to look up flow ID in table and " "get corresponding socket\n"); goto no_dccp_socket; @@ -750,6 +689,31 @@ static int dccp_v6_rcv(struct sk_buff *skb) goto no_dccp_socket; } + if (sk->sk_state == DCCP_NEW_SYN_RECV) { + struct request_sock *req = inet_reqsk(sk); + struct sock *nsk = NULL; + + sk = req->rsk_listener; + if (likely(sk->sk_state == DCCP_LISTEN)) { + nsk = dccp_check_req(sk, skb, req); + } else { + inet_csk_reqsk_queue_drop_and_put(sk, req); + goto lookup; + } + if (!nsk) { + reqsk_put(req); + goto discard_it; + } + if (nsk == sk) { + sock_hold(sk); + reqsk_put(req); + } else if (dccp_child_process(sk, nsk, skb)) { + dccp_v6_ctl_send_reset(sk, skb); + goto discard_it; + } else { + return 0; + } + } /* * RFC 4340, sec. 9.2.1: Minimum Checksum Coverage * o if MinCsCov = 0, only packets with CsCov = 0 are accepted @@ -919,7 +883,7 @@ static int dccp_v6_connect(struct sock *sk, struct sockaddr *uaddr, np->saddr = *saddr; inet->inet_rcv_saddr = LOOPBACK4_IPV6; - __ip6_dst_store(sk, dst, NULL, NULL); + ip6_dst_store(sk, dst, NULL, NULL); icsk->icsk_ext_hdr_len = 0; if (opt) diff --git a/net/dccp/minisocks.c b/net/dccp/minisocks.c index 838f524cf..1994f8af6 100644 --- a/net/dccp/minisocks.c +++ b/net/dccp/minisocks.c @@ -72,7 +72,7 @@ void dccp_time_wait(struct sock *sk, int state, int timeo) dccp_done(sk); } -struct sock *dccp_create_openreq_child(struct sock *sk, +struct sock *dccp_create_openreq_child(const struct sock *sk, const struct request_sock *req, const struct sk_buff *skb) { @@ -143,6 +143,7 @@ struct sock *dccp_check_req(struct sock *sk, struct sk_buff *skb, { struct sock *child = NULL; struct dccp_request_sock *dreq = dccp_rsk(req); + bool own_req; /* Check for retransmitted REQUEST */ if (dccp_hdr(skb)->dccph_type == DCCP_PKT_REQUEST) { @@ -182,14 +183,13 @@ struct sock *dccp_check_req(struct sock *sk, struct sk_buff *skb, if (dccp_parse_options(sk, dreq, skb)) goto drop; - child = inet_csk(sk)->icsk_af_ops->syn_recv_sock(sk, skb, req, NULL); - if (child == NULL) + child = inet_csk(sk)->icsk_af_ops->syn_recv_sock(sk, skb, req, NULL, + req, &own_req); + if (!child) goto listen_overflow; - inet_csk_reqsk_queue_drop(sk, req); - inet_csk_reqsk_queue_add(sk, req, child); -out: - return child; + return inet_csk_complete_hashdance(sk, child, req, own_req); + listen_overflow: dccp_pr_debug("listen_overflow!\n"); DCCP_SKB_CB(skb)->dccpd_reset_code = DCCP_RESET_CODE_TOO_BUSY; @@ -198,7 +198,7 @@ drop: req->rsk_ops->send_reset(sk, skb); inet_csk_reqsk_queue_drop(sk, req); - goto out; + return NULL; } EXPORT_SYMBOL_GPL(dccp_check_req); @@ -236,7 +236,7 @@ int dccp_child_process(struct sock *parent, struct sock *child, EXPORT_SYMBOL_GPL(dccp_child_process); -void dccp_reqsk_send_ack(struct sock *sk, struct sk_buff *skb, +void dccp_reqsk_send_ack(const struct sock *sk, struct sk_buff *skb, struct request_sock *rsk) { DCCP_BUG("DCCP-ACK packets are never sent in LISTEN/RESPOND state"); diff --git a/net/dccp/output.c b/net/dccp/output.c index 0248e8a34..4ce912e69 100644 --- a/net/dccp/output.c +++ b/net/dccp/output.c @@ -390,7 +390,7 @@ int dccp_retransmit_skb(struct sock *sk) return dccp_transmit_skb(sk, skb_clone(sk->sk_send_head, GFP_ATOMIC)); } -struct sk_buff *dccp_make_response(struct sock *sk, struct dst_entry *dst, +struct sk_buff *dccp_make_response(const struct sock *sk, struct dst_entry *dst, struct request_sock *req) { struct dccp_hdr *dh; @@ -398,13 +398,18 @@ struct sk_buff *dccp_make_response(struct sock *sk, struct dst_entry *dst, const u32 dccp_header_size = sizeof(struct dccp_hdr) + sizeof(struct dccp_hdr_ext) + sizeof(struct dccp_hdr_response); - struct sk_buff *skb = sock_wmalloc(sk, sk->sk_prot->max_header, 1, - GFP_ATOMIC); - if (skb == NULL) + struct sk_buff *skb; + + /* sk is marked const to clearly express we dont hold socket lock. + * sock_wmalloc() will atomically change sk->sk_wmem_alloc, + * it is safe to promote sk to non const. + */ + skb = sock_wmalloc((struct sock *)sk, MAX_DCCP_HEADER, 1, + GFP_ATOMIC); + if (!skb) return NULL; - /* Reserve space for headers. */ - skb_reserve(skb, sk->sk_prot->max_header); + skb_reserve(skb, MAX_DCCP_HEADER); skb_dst_set(skb, dst_clone(dst)); diff --git a/net/dccp/probe.c b/net/dccp/probe.c index d8346d0ea..3d3fda05b 100644 --- a/net/dccp/probe.c +++ b/net/dccp/probe.c @@ -30,6 +30,7 @@ #include <linux/module.h> #include <linux/kfifo.h> #include <linux/vmalloc.h> +#include <linux/time64.h> #include <linux/gfp.h> #include <net/net_namespace.h> @@ -47,20 +48,20 @@ static struct { struct kfifo fifo; spinlock_t lock; wait_queue_head_t wait; - struct timespec tstart; + struct timespec64 tstart; } dccpw; static void printl(const char *fmt, ...) { va_list args; int len; - struct timespec now; + struct timespec64 now; char tbuf[256]; va_start(args, fmt); - getnstimeofday(&now); + getnstimeofday64(&now); - now = timespec_sub(now, dccpw.tstart); + now = timespec64_sub(now, dccpw.tstart); len = sprintf(tbuf, "%lu.%06lu ", (unsigned long) now.tv_sec, @@ -110,7 +111,7 @@ static struct jprobe dccp_send_probe = { static int dccpprobe_open(struct inode *inode, struct file *file) { kfifo_reset(&dccpw.fifo); - getnstimeofday(&dccpw.tstart); + getnstimeofday64(&dccpw.tstart); return 0; } diff --git a/net/dccp/proto.c b/net/dccp/proto.c index b5cf13a28..41e65804d 100644 --- a/net/dccp/proto.c +++ b/net/dccp/proto.c @@ -339,8 +339,7 @@ unsigned int dccp_poll(struct file *file, struct socket *sock, if (sk_stream_is_writeable(sk)) { mask |= POLLOUT | POLLWRNORM; } else { /* send SIGIO later */ - set_bit(SOCK_ASYNC_NOSPACE, - &sk->sk_socket->flags); + sk_set_bit(SOCKWQ_ASYNC_NOSPACE, sk); set_bit(SOCK_NOSPACE, &sk->sk_socket->flags); /* Race breaker. If space is freed after |