X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=net%2Fdccp%2Fproto.c;h=88ed359b606cc5a40d94e0e497ec5ca0862cf425;hb=refs%2Fheads%2Fvserver;hp=2e0ee8355c415d24d13644e20ecb6d8e837d10c1;hpb=16cf0ec7408f389279d413869e94c1a351392f97;p=linux-2.6.git diff --git a/net/dccp/proto.c b/net/dccp/proto.c index 2e0ee8355..88ed359b6 100644 --- a/net/dccp/proto.c +++ b/net/dccp/proto.c @@ -9,7 +9,6 @@ * published by the Free Software Foundation. */ -#include #include #include #include @@ -53,6 +52,9 @@ struct inet_hashinfo __cacheline_aligned dccp_hashinfo = { EXPORT_SYMBOL_GPL(dccp_hashinfo); +/* the maximum queue length for tx in packets. 0 is no limit */ +int sysctl_dccp_tx_qlen __read_mostly = 5; + void dccp_set_state(struct sock *sk, const int state) { const int oldstate = sk->sk_state; @@ -194,7 +196,7 @@ int dccp_init_sock(struct sock *sk, const __u8 ctl_sock_initialized) sk, GFP_KERNEL); dp->dccps_hc_tx_ccid = ccid_hc_tx_new(dmsk->dccpms_tx_ccid, sk, GFP_KERNEL); - if (unlikely(dp->dccps_hc_rx_ccid == NULL || + if (unlikely(dp->dccps_hc_rx_ccid == NULL || dp->dccps_hc_tx_ccid == NULL)) { ccid_hc_rx_delete(dp->dccps_hc_rx_ccid, sk); ccid_hc_tx_delete(dp->dccps_hc_tx_ccid, sk); @@ -213,12 +215,13 @@ int dccp_init_sock(struct sock *sk, const __u8 ctl_sock_initialized) dccp_init_xmit_timers(sk); icsk->icsk_rto = DCCP_TIMEOUT_INIT; + icsk->icsk_syn_retries = sysctl_dccp_request_retries; sk->sk_state = DCCP_CLOSED; sk->sk_write_space = dccp_write_space; icsk->icsk_sync_mss = dccp_sync_mss; dp->dccps_mss_cache = 536; dp->dccps_role = DCCP_ROLE_UNDEFINED; - dp->dccps_service = DCCP_SERVICE_INVALID_VALUE; + dp->dccps_service = DCCP_SERVICE_CODE_IS_ABSENT; dp->dccps_l_ack_ratio = dp->dccps_r_ack_ratio = 1; return 0; @@ -263,18 +266,12 @@ int dccp_destroy_sock(struct sock *sk) EXPORT_SYMBOL_GPL(dccp_destroy_sock); -static inline int dccp_listen_start(struct sock *sk) +static inline int dccp_listen_start(struct sock *sk, int backlog) { struct dccp_sock *dp = dccp_sk(sk); dp->dccps_role = DCCP_ROLE_LISTEN; - /* - * Apps need to use setsockopt(DCCP_SOCKOPT_SERVICE) - * before calling listen() - */ - if (dccp_service_not_initialized(sk)) - return -EPROTO; - return inet_csk_listen_start(sk, TCP_SYNQ_HSIZE); + return inet_csk_listen_start(sk, backlog); } int dccp_disconnect(struct sock *sk, int flags) @@ -393,7 +390,7 @@ static int dccp_setsockopt_service(struct sock *sk, const __be32 service, struct dccp_sock *dp = dccp_sk(sk); struct dccp_service_list *sl = NULL; - if (service == DCCP_SERVICE_INVALID_VALUE || + if (service == DCCP_SERVICE_INVALID_VALUE || optlen > DCCP_SERVICE_LIST_MAX_LEN * sizeof(u32)) return -EINVAL; @@ -458,9 +455,8 @@ out_free_val: static int do_dccp_setsockopt(struct sock *sk, int level, int optname, char __user *optval, int optlen) { - struct dccp_sock *dp; - int err; - int val; + struct dccp_sock *dp = dccp_sk(sk); + int val, err = 0; if (optlen < sizeof(int)) return -EINVAL; @@ -472,37 +468,47 @@ static int do_dccp_setsockopt(struct sock *sk, int level, int optname, return dccp_setsockopt_service(sk, val, optval, optlen); lock_sock(sk); - dp = dccp_sk(sk); - err = 0; - switch (optname) { case DCCP_SOCKOPT_PACKET_SIZE: - dp->dccps_packet_size = val; + DCCP_WARN("sockopt(PACKET_SIZE) is deprecated: fix your app\n"); + err = 0; break; - case DCCP_SOCKOPT_CHANGE_L: if (optlen != sizeof(struct dccp_so_feat)) err = -EINVAL; else err = dccp_setsockopt_change(sk, DCCPO_CHANGE_L, - (struct dccp_so_feat *) + (struct dccp_so_feat __user *) optval); break; - case DCCP_SOCKOPT_CHANGE_R: if (optlen != sizeof(struct dccp_so_feat)) err = -EINVAL; else err = dccp_setsockopt_change(sk, DCCPO_CHANGE_R, - (struct dccp_so_feat *) + (struct dccp_so_feat __user *) optval); break; - + case DCCP_SOCKOPT_SEND_CSCOV: /* sender side, RFC 4340, sec. 9.2 */ + if (val < 0 || val > 15) + err = -EINVAL; + else + dp->dccps_pcslen = val; + break; + case DCCP_SOCKOPT_RECV_CSCOV: /* receiver side, RFC 4340 sec. 9.2.1 */ + if (val < 0 || val > 15) + err = -EINVAL; + else { + dp->dccps_pcrlen = val; + /* FIXME: add feature negotiation, + * ChangeL(MinimumChecksumCoverage, val) */ + } + break; default: err = -ENOPROTOOPT; break; } - + release_sock(sk); return err; } @@ -541,9 +547,6 @@ static int dccp_getsockopt_service(struct sock *sk, int len, int err = -ENOENT, slen = 0, total_len = sizeof(u32); lock_sock(sk); - if (dccp_service_not_initialized(sk)) - goto out; - if ((sl = dp->dccps_service_list) != NULL) { slen = sl->dccpsl_nr * sizeof(u32); total_len += slen; @@ -572,19 +575,26 @@ static int do_dccp_getsockopt(struct sock *sk, int level, int optname, if (get_user(len, optlen)) return -EFAULT; - if (len < sizeof(int)) + if (len < (int)sizeof(int)) return -EINVAL; dp = dccp_sk(sk); switch (optname) { case DCCP_SOCKOPT_PACKET_SIZE: - val = dp->dccps_packet_size; - len = sizeof(dp->dccps_packet_size); - break; + DCCP_WARN("sockopt(PACKET_SIZE) is deprecated: fix your app\n"); + return 0; case DCCP_SOCKOPT_SERVICE: return dccp_getsockopt_service(sk, len, (__be32 __user *)optval, optlen); + case DCCP_SOCKOPT_SEND_CSCOV: + val = dp->dccps_pcslen; + len = sizeof(val); + break; + case DCCP_SOCKOPT_RECV_CSCOV: + val = dp->dccps_pcrlen; + len = sizeof(val); + break; case 128 ... 191: return ccid_hc_rx_getsockopt(dp->dccps_hc_rx_ccid, sk, optname, len, (u32 __user *)optval, optlen); @@ -640,6 +650,13 @@ int dccp_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg, return -EMSGSIZE; lock_sock(sk); + + if (sysctl_dccp_tx_qlen && + (sk->sk_write_queue.qlen >= sysctl_dccp_tx_qlen)) { + rc = -EAGAIN; + goto out_release; + } + timeo = sock_sndtimeo(sk, noblock); /* @@ -663,17 +680,8 @@ int dccp_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg, if (rc != 0) goto out_discard; - rc = dccp_write_xmit(sk, skb, &timeo); - /* - * XXX we don't use sk_write_queue, so just discard the packet. - * Current plan however is to _use_ sk_write_queue with - * an algorith similar to tcp_sendmsg, where the main difference - * is that in DCCP we have to respect packet boundaries, so - * no coalescing of skbs. - * - * This bug was _quickly_ found & fixed by just looking at an OSTRA - * generated callgraph 8) -acme - */ + skb_queue_tail(&sk->sk_write_queue, skb); + dccp_write_xmit(sk,0); out_release: release_sock(sk); return rc ? : len; @@ -719,7 +727,7 @@ int dccp_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg, } dccp_pr_debug("packet_type=%s\n", dccp_packet_name(dh->dccph_type)); - sk_eat_skb(sk, skb); + sk_eat_skb(sk, skb, 0); verify_sock_status: if (sock_flag(sk, SOCK_DONE)) { len = 0; @@ -773,7 +781,7 @@ verify_sock_status: } found_fin_ok: if (!(flags & MSG_PEEK)) - sk_eat_skb(sk, skb); + sk_eat_skb(sk, skb, 0); break; } while (1); out: @@ -807,7 +815,7 @@ int inet_dccp_listen(struct socket *sock, int backlog) * FIXME: here it probably should be sk->sk_prot->listen_start * see tcp_listen_start */ - err = dccp_listen_start(sk); + err = dccp_listen_start(sk, backlog); if (err) goto out; } @@ -824,7 +832,7 @@ EXPORT_SYMBOL_GPL(inet_dccp_listen); static const unsigned char dccp_new_state[] = { /* current state: new state: action: */ [0] = DCCP_CLOSED, - [DCCP_OPEN] = DCCP_CLOSING | DCCP_ACTION_FIN, + [DCCP_OPEN] = DCCP_CLOSING | DCCP_ACTION_FIN, [DCCP_REQUESTING] = DCCP_CLOSED, [DCCP_PARTOPEN] = DCCP_CLOSING | DCCP_ACTION_FIN, [DCCP_LISTEN] = DCCP_CLOSED, @@ -847,6 +855,7 @@ static int dccp_close_state(struct sock *sk) void dccp_close(struct sock *sk, long timeout) { + struct dccp_sock *dp = dccp_sk(sk); struct sk_buff *skb; int state; @@ -863,6 +872,8 @@ void dccp_close(struct sock *sk, long timeout) goto adjudge_to_death; } + sk_stop_timer(sk, &dp->dccps_xmit_timer); + /* * We need to flush the recv. buffs. We do this only on the * descriptor close, not protocol-sourced closes, because the @@ -1024,8 +1035,7 @@ static int __init dccp_init(void) } while (!dccp_hashinfo.ehash && --ehash_order > 0); if (!dccp_hashinfo.ehash) { - printk(KERN_CRIT "Failed to allocate DCCP " - "established hash table\n"); + DCCP_CRIT("Failed to allocate DCCP established hash table"); goto out_free_bind_bucket_cachep; } @@ -1047,7 +1057,7 @@ static int __init dccp_init(void) } while (!dccp_hashinfo.bhash && --bhash_order >= 0); if (!dccp_hashinfo.bhash) { - printk(KERN_CRIT "Failed to allocate DCCP bind hash table\n"); + DCCP_CRIT("Failed to allocate DCCP bind hash table"); goto out_free_dccp_ehash; }