diff options
Diffstat (limited to 'net/iucv')
| -rw-r--r-- | net/iucv/Kconfig | 14 | ||||
| -rw-r--r-- | net/iucv/af_iucv.c | 870 | ||||
| -rw-r--r-- | net/iucv/iucv.c | 23 |
3 files changed, 784 insertions, 123 deletions
diff --git a/net/iucv/Kconfig b/net/iucv/Kconfig index 16ce9cd4f39e..497fbe732def 100644 --- a/net/iucv/Kconfig +++ b/net/iucv/Kconfig @@ -1,15 +1,17 @@ config IUCV - tristate "IUCV support (S390 - z/VM only)" depends on S390 + def_tristate y if S390 + prompt "IUCV support (S390 - z/VM only)" help Select this option if you want to use inter-user communication under VM or VIF. If you run on z/VM, say "Y" to enable a fast communication link between VM guests. config AFIUCV - tristate "AF_IUCV support (S390 - z/VM only)" - depends on IUCV + depends on S390 + def_tristate m if QETH_L3 || IUCV + prompt "AF_IUCV Socket support (S390 - z/VM and HiperSockets transport)" help - Select this option if you want to use inter-user communication under - VM or VIF sockets. If you run on z/VM, say "Y" to enable a fast - communication link between VM guests. + Select this option if you want to use AF_IUCV socket applications + based on z/VM inter-user communication vehicle or based on + HiperSockets. diff --git a/net/iucv/af_iucv.c b/net/iucv/af_iucv.c index e2013e434d03..274d150320c0 100644 --- a/net/iucv/af_iucv.c +++ b/net/iucv/af_iucv.c @@ -27,10 +27,9 @@ #include <asm/cpcmd.h> #include <linux/kmod.h> -#include <net/iucv/iucv.h> #include <net/iucv/af_iucv.h> -#define VERSION "1.1" +#define VERSION "1.2" static char iucv_userid[80]; @@ -42,6 +41,8 @@ static struct proto iucv_proto = { .obj_size = sizeof(struct iucv_sock), }; +static struct iucv_interface *pr_iucv; + /* special AF_IUCV IPRM messages */ static const u8 iprm_shutdown[8] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01}; @@ -90,6 +91,12 @@ do { \ static void iucv_sock_kill(struct sock *sk); static void iucv_sock_close(struct sock *sk); +static int afiucv_hs_rcv(struct sk_buff *skb, struct net_device *dev, + struct packet_type *pt, struct net_device *orig_dev); +static int afiucv_hs_send(struct iucv_message *imsg, struct sock *sock, + struct sk_buff *skb, u8 flags); +static void afiucv_hs_callback_txnotify(struct sk_buff *, enum iucv_tx_notify); + /* Call Back functions */ static void iucv_callback_rx(struct iucv_path *, struct iucv_message *); static void iucv_callback_txdone(struct iucv_path *, struct iucv_message *); @@ -165,7 +172,7 @@ static int afiucv_pm_freeze(struct device *dev) case IUCV_CLOSING: case IUCV_CONNECTED: if (iucv->path) { - err = iucv_path_sever(iucv->path, NULL); + err = pr_iucv->path_sever(iucv->path, NULL); iucv_path_free(iucv->path); iucv->path = NULL; } @@ -229,7 +236,7 @@ static const struct dev_pm_ops afiucv_pm_ops = { static struct device_driver af_iucv_driver = { .owner = THIS_MODULE, .name = "afiucv", - .bus = &iucv_bus, + .bus = NULL, .pm = &afiucv_pm_ops, }; @@ -294,7 +301,11 @@ static inline int iucv_below_msglim(struct sock *sk) if (sk->sk_state != IUCV_CONNECTED) return 1; - return (skb_queue_len(&iucv->send_skb_q) < iucv->path->msglim); + if (iucv->transport == AF_IUCV_TRANS_IUCV) + return (skb_queue_len(&iucv->send_skb_q) < iucv->path->msglim); + else + return ((atomic_read(&iucv->msg_sent) < iucv->msglimit_peer) && + (atomic_read(&iucv->pendings) <= 0)); } /** @@ -312,6 +323,79 @@ static void iucv_sock_wake_msglim(struct sock *sk) rcu_read_unlock(); } +/** + * afiucv_hs_send() - send a message through HiperSockets transport + */ +static int afiucv_hs_send(struct iucv_message *imsg, struct sock *sock, + struct sk_buff *skb, u8 flags) +{ + struct net *net = sock_net(sock); + struct iucv_sock *iucv = iucv_sk(sock); + struct af_iucv_trans_hdr *phs_hdr; + struct sk_buff *nskb; + int err, confirm_recv = 0; + + memset(skb->head, 0, ETH_HLEN); + phs_hdr = (struct af_iucv_trans_hdr *)skb_push(skb, + sizeof(struct af_iucv_trans_hdr)); + skb_reset_mac_header(skb); + skb_reset_network_header(skb); + skb_push(skb, ETH_HLEN); + skb_reset_mac_header(skb); + memset(phs_hdr, 0, sizeof(struct af_iucv_trans_hdr)); + + phs_hdr->magic = ETH_P_AF_IUCV; + phs_hdr->version = 1; + phs_hdr->flags = flags; + if (flags == AF_IUCV_FLAG_SYN) + phs_hdr->window = iucv->msglimit; + else if ((flags == AF_IUCV_FLAG_WIN) || !flags) { + confirm_recv = atomic_read(&iucv->msg_recv); + phs_hdr->window = confirm_recv; + if (confirm_recv) + phs_hdr->flags = phs_hdr->flags | AF_IUCV_FLAG_WIN; + } + memcpy(phs_hdr->destUserID, iucv->dst_user_id, 8); + memcpy(phs_hdr->destAppName, iucv->dst_name, 8); + memcpy(phs_hdr->srcUserID, iucv->src_user_id, 8); + memcpy(phs_hdr->srcAppName, iucv->src_name, 8); + ASCEBC(phs_hdr->destUserID, sizeof(phs_hdr->destUserID)); + ASCEBC(phs_hdr->destAppName, sizeof(phs_hdr->destAppName)); + ASCEBC(phs_hdr->srcUserID, sizeof(phs_hdr->srcUserID)); + ASCEBC(phs_hdr->srcAppName, sizeof(phs_hdr->srcAppName)); + if (imsg) + memcpy(&phs_hdr->iucv_hdr, imsg, sizeof(struct iucv_message)); + + rcu_read_lock(); + skb->dev = dev_get_by_index_rcu(net, sock->sk_bound_dev_if); + rcu_read_unlock(); + if (!skb->dev) + return -ENODEV; + if (!(skb->dev->flags & IFF_UP)) + return -ENETDOWN; + if (skb->len > skb->dev->mtu) { + if (sock->sk_type == SOCK_SEQPACKET) + return -EMSGSIZE; + else + skb_trim(skb, skb->dev->mtu); + } + skb->protocol = ETH_P_AF_IUCV; + skb_shinfo(skb)->tx_flags |= SKBTX_DRV_NEEDS_SK_REF; + nskb = skb_clone(skb, GFP_ATOMIC); + if (!nskb) + return -ENOMEM; + skb_queue_tail(&iucv->send_skb_q, nskb); + err = dev_queue_xmit(skb); + if (err) { + skb_unlink(nskb, &iucv->send_skb_q); + kfree_skb(nskb); + } else { + atomic_sub(confirm_recv, &iucv->msg_recv); + WARN_ON(atomic_read(&iucv->msg_recv) < 0); + } + return err; +} + /* Timers */ static void iucv_sock_timeout(unsigned long arg) { @@ -380,6 +464,8 @@ static void iucv_sock_close(struct sock *sk) unsigned char user_data[16]; struct iucv_sock *iucv = iucv_sk(sk); unsigned long timeo; + int err, blen; + struct sk_buff *skb; iucv_sock_clear_timer(sk); lock_sock(sk); @@ -390,6 +476,20 @@ static void iucv_sock_close(struct sock *sk) break; case IUCV_CONNECTED: + if (iucv->transport == AF_IUCV_TRANS_HIPER) { + /* send fin */ + blen = sizeof(struct af_iucv_trans_hdr) + ETH_HLEN; + skb = sock_alloc_send_skb(sk, blen, 1, &err); + if (skb) { + skb_reserve(skb, + sizeof(struct af_iucv_trans_hdr) + + ETH_HLEN); + err = afiucv_hs_send(NULL, sk, skb, + AF_IUCV_FLAG_FIN); + } + sk->sk_state = IUCV_DISCONN; + sk->sk_state_change(sk); + } case IUCV_DISCONN: sk->sk_state = IUCV_CLOSING; sk->sk_state_change(sk); @@ -412,7 +512,7 @@ static void iucv_sock_close(struct sock *sk) low_nmcpy(user_data, iucv->src_name); high_nmcpy(user_data, iucv->dst_name); ASCEBC(user_data, sizeof(user_data)); - iucv_path_sever(iucv->path, user_data); + pr_iucv->path_sever(iucv->path, user_data); iucv_path_free(iucv->path); iucv->path = NULL; } @@ -444,23 +544,33 @@ static void iucv_sock_init(struct sock *sk, struct sock *parent) static struct sock *iucv_sock_alloc(struct socket *sock, int proto, gfp_t prio) { struct sock *sk; + struct iucv_sock *iucv; sk = sk_alloc(&init_net, PF_IUCV, prio, &iucv_proto); if (!sk) return NULL; + iucv = iucv_sk(sk); sock_init_data(sock, sk); - INIT_LIST_HEAD(&iucv_sk(sk)->accept_q); - spin_lock_init(&iucv_sk(sk)->accept_q_lock); - skb_queue_head_init(&iucv_sk(sk)->send_skb_q); - INIT_LIST_HEAD(&iucv_sk(sk)->message_q.list); - spin_lock_init(&iucv_sk(sk)->message_q.lock); - skb_queue_head_init(&iucv_sk(sk)->backlog_skb_q); - iucv_sk(sk)->send_tag = 0; - iucv_sk(sk)->flags = 0; - iucv_sk(sk)->msglimit = IUCV_QUEUELEN_DEFAULT; - iucv_sk(sk)->path = NULL; - memset(&iucv_sk(sk)->src_user_id , 0, 32); + INIT_LIST_HEAD(&iucv->accept_q); + spin_lock_init(&iucv->accept_q_lock); + skb_queue_head_init(&iucv->send_skb_q); + INIT_LIST_HEAD(&iucv->message_q.list); + spin_lock_init(&iucv->message_q.lock); + skb_queue_head_init(&iucv->backlog_skb_q); + iucv->send_tag = 0; + atomic_set(&iucv->pendings, 0); + iucv->flags = 0; + iucv->msglimit = 0; + atomic_set(&iucv->msg_sent, 0); + atomic_set(&iucv->msg_recv, 0); + iucv->path = NULL; + iucv->sk_txnotify = afiucv_hs_callback_txnotify; + memset(&iucv->src_user_id , 0, 32); + if (pr_iucv) + iucv->transport = AF_IUCV_TRANS_IUCV; + else + iucv->transport = AF_IUCV_TRANS_HIPER; sk->sk_destruct = iucv_sock_destruct; sk->sk_sndtimeo = IUCV_CONN_TIMEOUT; @@ -591,7 +701,9 @@ static int iucv_sock_bind(struct socket *sock, struct sockaddr *addr, struct sockaddr_iucv *sa = (struct sockaddr_iucv *) addr; struct sock *sk = sock->sk; struct iucv_sock *iucv; - int err; + int err = 0; + struct net_device *dev; + char uid[9]; /* Verify the input sockaddr */ if (!addr || addr->sa_family != AF_IUCV) @@ -610,19 +722,46 @@ static int iucv_sock_bind(struct socket *sock, struct sockaddr *addr, err = -EADDRINUSE; goto done_unlock; } - if (iucv->path) { - err = 0; + if (iucv->path) goto done_unlock; - } /* Bind the socket */ - memcpy(iucv->src_name, sa->siucv_name, 8); - /* Copy the user id */ - memcpy(iucv->src_user_id, iucv_userid, 8); - sk->sk_state = IUCV_BOUND; - err = 0; + if (pr_iucv) + if (!memcmp(sa->siucv_user_id, iucv_userid, 8)) + goto vm_bind; /* VM IUCV transport */ + /* try hiper transport */ + memcpy(uid, sa->siucv_user_id, sizeof(uid)); + ASCEBC(uid, 8); + rcu_read_lock(); + for_each_netdev_rcu(&init_net, dev) { + if (!memcmp(dev->perm_addr, uid, 8)) { + memcpy(iucv->src_name, sa->siucv_name, 8); + memcpy(iucv->src_user_id, sa->siucv_user_id, 8); + sock->sk->sk_bound_dev_if = dev->ifindex; + sk->sk_state = IUCV_BOUND; + iucv->transport = AF_IUCV_TRANS_HIPER; + if (!iucv->msglimit) + iucv->msglimit = IUCV_HIPER_MSGLIM_DEFAULT; + rcu_read_unlock(); + goto done_unlock; + } + } + rcu_read_unlock(); +vm_bind: + if (pr_iucv) { + /* use local userid for backward compat */ + memcpy(iucv->src_name, sa->siucv_name, 8); + memcpy(iucv->src_user_id, iucv_userid, 8); + sk->sk_state = IUCV_BOUND; + iucv->transport = AF_IUCV_TRANS_IUCV; + if (!iucv->msglimit) + iucv->msglimit = IUCV_QUEUELEN_DEFAULT; + goto done_unlock; + } + /* found no dev to bind */ + err = -ENODEV; done_unlock: /* Release the socket list lock */ write_unlock_bh(&iucv_sk_list.lock); @@ -658,45 +797,44 @@ static int iucv_sock_autobind(struct sock *sk) memcpy(&iucv->src_name, name, 8); + if (!iucv->msglimit) + iucv->msglimit = IUCV_QUEUELEN_DEFAULT; + return err; } -/* Connect an unconnected socket */ -static int iucv_sock_connect(struct socket *sock, struct sockaddr *addr, - int alen, int flags) +static int afiucv_hs_connect(struct socket *sock) { - struct sockaddr_iucv *sa = (struct sockaddr_iucv *) addr; struct sock *sk = sock->sk; - struct iucv_sock *iucv; - unsigned char user_data[16]; - int err; - - if (addr->sa_family != AF_IUCV || alen < sizeof(struct sockaddr_iucv)) - return -EINVAL; - - if (sk->sk_state != IUCV_OPEN && sk->sk_state != IUCV_BOUND) - return -EBADFD; - - if (sk->sk_type != SOCK_STREAM && sk->sk_type != SOCK_SEQPACKET) - return -EINVAL; + struct sk_buff *skb; + int blen = sizeof(struct af_iucv_trans_hdr) + ETH_HLEN; + int err = 0; - if (sk->sk_state == IUCV_OPEN) { - err = iucv_sock_autobind(sk); - if (unlikely(err)) - return err; + /* send syn */ + skb = sock_alloc_send_skb(sk, blen, 1, &err); + if (!skb) { + err = -ENOMEM; + goto done; } + skb->dev = NULL; + skb_reserve(skb, blen); + err = afiucv_hs_send(NULL, sk, skb, AF_IUCV_FLAG_SYN); +done: + return err; +} - lock_sock(sk); - - /* Set the destination information */ - memcpy(iucv_sk(sk)->dst_user_id, sa->siucv_user_id, 8); - memcpy(iucv_sk(sk)->dst_name, sa->siucv_name, 8); +static int afiucv_path_connect(struct socket *sock, struct sockaddr *addr) +{ + struct sockaddr_iucv *sa = (struct sockaddr_iucv *) addr; + struct sock *sk = sock->sk; + struct iucv_sock *iucv = iucv_sk(sk); + unsigned char user_data[16]; + int err; high_nmcpy(user_data, sa->siucv_name); - low_nmcpy(user_data, iucv_sk(sk)->src_name); + low_nmcpy(user_data, iucv->src_name); ASCEBC(user_data, sizeof(user_data)); - iucv = iucv_sk(sk); /* Create path. */ iucv->path = iucv_path_alloc(iucv->msglimit, IUCV_IPRMDATA, GFP_KERNEL); @@ -704,8 +842,9 @@ static int iucv_sock_connect(struct socket *sock, struct sockaddr *addr, err = -ENOMEM; goto done; } - err = iucv_path_connect(iucv->path, &af_iucv_handler, - sa->siucv_user_id, NULL, user_data, sk); + err = pr_iucv->path_connect(iucv->path, &af_iucv_handler, + sa->siucv_user_id, NULL, user_data, + sk); if (err) { iucv_path_free(iucv->path); iucv->path = NULL; @@ -724,21 +863,62 @@ static int iucv_sock_connect(struct socket *sock, struct sockaddr *addr, err = -ECONNREFUSED; break; } - goto done; } +done: + return err; +} - if (sk->sk_state != IUCV_CONNECTED) { +/* Connect an unconnected socket */ +static int iucv_sock_connect(struct socket *sock, struct sockaddr *addr, + int alen, int flags) +{ + struct sockaddr_iucv *sa = (struct sockaddr_iucv *) addr; + struct sock *sk = sock->sk; + struct iucv_sock *iucv = iucv_sk(sk); + int err; + + if (addr->sa_family != AF_IUCV || alen < sizeof(struct sockaddr_iucv)) + return -EINVAL; + + if (sk->sk_state != IUCV_OPEN && sk->sk_state != IUCV_BOUND) + return -EBADFD; + + if (sk->sk_state == IUCV_OPEN && + iucv->transport == AF_IUCV_TRANS_HIPER) + return -EBADFD; /* explicit bind required */ + + if (sk->sk_type != SOCK_STREAM && sk->sk_type != SOCK_SEQPACKET) + return -EINVAL; + + if (sk->sk_state == IUCV_OPEN) { + err = iucv_sock_autobind(sk); + if (unlikely(err)) + return err; + } + + lock_sock(sk); + + /* Set the destination information */ + memcpy(iucv->dst_user_id, sa->siucv_user_id, 8); + memcpy(iucv->dst_name, sa->siucv_name, 8); + + if (iucv->transport == AF_IUCV_TRANS_HIPER) + err = afiucv_hs_connect(sock); + else + err = afiucv_path_connect(sock, addr); + if (err) + goto done; + + if (sk->sk_state != IUCV_CONNECTED) err = iucv_sock_wait(sk, iucv_sock_in_state(sk, IUCV_CONNECTED, IUCV_DISCONN), sock_sndtimeo(sk, flags & O_NONBLOCK)); - } - if (sk->sk_state == IUCV_DISCONN) { + if (sk->sk_state == IUCV_DISCONN || sk->sk_state == IUCV_CLOSED) err = -ECONNREFUSED; - } - if (err) { - iucv_path_sever(iucv->path, NULL); + if (err && iucv->transport == AF_IUCV_TRANS_IUCV) { + pr_iucv->path_sever(iucv->path, NULL); iucv_path_free(iucv->path); iucv->path = NULL; } @@ -833,20 +1013,21 @@ static int iucv_sock_getname(struct socket *sock, struct sockaddr *addr, { struct sockaddr_iucv *siucv = (struct sockaddr_iucv *) addr; struct sock *sk = sock->sk; + struct iucv_sock *iucv = iucv_sk(sk); addr->sa_family = AF_IUCV; *len = sizeof(struct sockaddr_iucv); if (peer) { - memcpy(siucv->siucv_user_id, iucv_sk(sk)->dst_user_id, 8); - memcpy(siucv->siucv_name, &iucv_sk(sk)->dst_name, 8); + memcpy(siucv->siucv_user_id, iucv->dst_user_id, 8); + memcpy(siucv->siucv_name, iucv->dst_name, 8); } else { - memcpy(siucv->siucv_user_id, iucv_sk(sk)->src_user_id, 8); - memcpy(siucv->siucv_name, iucv_sk(sk)->src_name, 8); + memcpy(siucv->siucv_user_id, iucv->src_user_id, 8); + memcpy(siucv->siucv_name, iucv->src_name, 8); } memset(&siucv->siucv_port, 0, sizeof(siucv->siucv_port)); memset(&siucv->siucv_addr, 0, sizeof(siucv->siucv_addr)); - memset(siucv->siucv_nodeid, 0, sizeof(siucv->siucv_nodeid)); + memset(&siucv->siucv_nodeid, 0, sizeof(siucv->siucv_nodeid)); return 0; } @@ -871,7 +1052,7 @@ static int iucv_send_iprm(struct iucv_path *path, struct iucv_message *msg, memcpy(prmdata, (void *) skb->data, skb->len); prmdata[7] = 0xff - (u8) skb->len; - return iucv_message_send(path, msg, IUCV_IPRMDATA, 0, + return pr_iucv->message_send(path, msg, IUCV_IPRMDATA, 0, (void *) prmdata, 8); } @@ -960,9 +1141,16 @@ static int iucv_sock_sendmsg(struct kiocb *iocb, struct socket *sock, * this is fine for SOCK_SEQPACKET (unless we want to support * segmented records using the MSG_EOR flag), but * for SOCK_STREAM we might want to improve it in future */ - skb = sock_alloc_send_skb(sk, len, noblock, &err); + if (iucv->transport == AF_IUCV_TRANS_HIPER) + skb = sock_alloc_send_skb(sk, + len + sizeof(struct af_iucv_trans_hdr) + ETH_HLEN, + noblock, &err); + else + skb = sock_alloc_send_skb(sk, len, noblock, &err); if (!skb) goto out; + if (iucv->transport == AF_IUCV_TRANS_HIPER) + skb_reserve(skb, sizeof(struct af_iucv_trans_hdr) + ETH_HLEN); if (memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len)) { err = -EFAULT; goto fail; @@ -983,6 +1171,15 @@ static int iucv_sock_sendmsg(struct kiocb *iocb, struct socket *sock, /* increment and save iucv message tag for msg_completion cbk */ txmsg.tag = iucv->send_tag++; memcpy(CB_TAG(skb), &txmsg.tag, CB_TAG_LEN); + if (iucv->transport == AF_IUCV_TRANS_HIPER) { + atomic_inc(&iucv->msg_sent); + err = afiucv_hs_send(&txmsg, sk, skb, 0); + if (err) { + atomic_dec(&iucv->msg_sent); + goto fail; + } + goto release; + } skb_queue_tail(&iucv->send_skb_q, skb); if (((iucv->path->flags & IUCV_IPRMDATA) & iucv->flags) @@ -999,13 +1196,13 @@ static int iucv_sock_sendmsg(struct kiocb *iocb, struct socket *sock, /* this error should never happen since the * IUCV_IPRMDATA path flag is set... sever path */ if (err == 0x15) { - iucv_path_sever(iucv->path, NULL); + pr_iucv->path_sever(iucv->path, NULL); skb_unlink(skb, &iucv->send_skb_q); err = -EPIPE; goto fail; } } else - err = iucv_message_send(iucv->path, &txmsg, 0, 0, + err = pr_iucv->message_send(iucv->path, &txmsg, 0, 0, (void *) skb->data, skb->len); if (err) { if (err == 3) { @@ -1023,6 +1220,7 @@ static int iucv_sock_sendmsg(struct kiocb *iocb, struct socket *sock, goto fail; } +release: release_sock(sk); return len; @@ -1095,8 +1293,9 @@ static void iucv_process_message(struct sock *sk, struct sk_buff *skb, skb->len = 0; } } else { - rc = iucv_message_receive(path, msg, msg->flags & IUCV_IPRMDATA, - skb->data, len, NULL); + rc = pr_iucv->message_receive(path, msg, + msg->flags & IUCV_IPRMDATA, + skb->data, len, NULL); if (rc) { kfree_skb(skb); return; @@ -1110,7 +1309,7 @@ static void iucv_process_message(struct sock *sk, struct sk_buff *skb, kfree_skb(skb); skb = NULL; if (rc) { - iucv_path_sever(path, NULL); + pr_iucv->path_sever(path, NULL); return; } skb = skb_dequeue(&iucv_sk(sk)->backlog_skb_q); @@ -1154,7 +1353,8 @@ static int iucv_sock_recvmsg(struct kiocb *iocb, struct socket *sock, struct sock *sk = sock->sk; struct iucv_sock *iucv = iucv_sk(sk); unsigned int copied, rlen; - struct sk_buff *skb, *rskb, *cskb; + struct sk_buff *skb, *rskb, *cskb, *sskb; + int blen; int err = 0; if ((sk->sk_state == IUCV_DISCONN || sk->sk_state == IUCV_SEVERED) && @@ -1179,7 +1379,7 @@ static int iucv_sock_recvmsg(struct kiocb *iocb, struct socket *sock, copied = min_t(unsigned int, rlen, len); cskb = skb; - if (memcpy_toiovec(msg->msg_iov, cskb->data, copied)) { + if (skb_copy_datagram_iovec(cskb, 0, msg->msg_iov, copied)) { if (!(flags & MSG_PEEK)) skb_queue_head(&sk->sk_receive_queue, skb); return -EFAULT; @@ -1217,6 +1417,7 @@ static int iucv_sock_recvmsg(struct kiocb *iocb, struct socket *sock, } kfree_skb(skb); + atomic_inc(&iucv->msg_recv); /* Queue backlog skbs */ spin_lock_bh(&iucv->message_q.lock); @@ -1233,6 +1434,24 @@ static int iucv_sock_recvmsg(struct kiocb *iocb, struct socket *sock, if (skb_queue_empty(&iucv->backlog_skb_q)) { if (!list_empty(&iucv->message_q.list)) iucv_process_message_q(sk); + if (atomic_read(&iucv->msg_recv) >= + iucv->msglimit / 2) { + /* send WIN to peer */ + blen = sizeof(struct af_iucv_trans_hdr) + + ETH_HLEN; + sskb = sock_alloc_send_skb(sk, blen, 1, &err); + if (sskb) { + skb_reserve(sskb, + sizeof(struct af_iucv_trans_hdr) + + ETH_HLEN); + err = afiucv_hs_send(NULL, sk, sskb, + AF_IUCV_FLAG_WIN); + } + if (err) { + sk->sk_state = IUCV_DISCONN; + sk->sk_state_change(sk); + } + } } spin_unlock_bh(&iucv->message_q.lock); } @@ -1327,8 +1546,8 @@ static int iucv_sock_shutdown(struct socket *sock, int how) if (how == SEND_SHUTDOWN || how == SHUTDOWN_MASK) { txmsg.class = 0; txmsg.tag = 0; - err = iucv_message_send(iucv->path, &txmsg, IUCV_IPRMDATA, 0, - (void *) iprm_shutdown, 8); + err = pr_iucv->message_send(iucv->path, &txmsg, IUCV_IPRMDATA, + 0, (void *) iprm_shutdown, 8); if (err) { switch (err) { case 1: @@ -1345,7 +1564,7 @@ static int iucv_sock_shutdown(struct socket *sock, int how) } if (how == RCV_SHUTDOWN || how == SHUTDOWN_MASK) { - err = iucv_path_quiesce(iucv_sk(sk)->path, NULL); + err = pr_iucv->path_quiesce(iucv->path, NULL); if (err) err = -ENOTCONN; @@ -1372,7 +1591,7 @@ static int iucv_sock_release(struct socket *sock) /* Unregister with IUCV base support */ if (iucv_sk(sk)->path) { - iucv_path_sever(iucv_sk(sk)->path, NULL); + pr_iucv->path_sever(iucv_sk(sk)->path, NULL); iucv_path_free(iucv_sk(sk)->path); iucv_sk(sk)->path = NULL; } @@ -1514,14 +1733,14 @@ static int iucv_callback_connreq(struct iucv_path *path, high_nmcpy(user_data, iucv->dst_name); ASCEBC(user_data, sizeof(user_data)); if (sk->sk_state != IUCV_LISTEN) { - err = iucv_path_sever(path, user_data); + err = pr_iucv->path_sever(path, user_data); iucv_path_free(path); goto fail; } /* Check for backlog size */ if (sk_acceptq_is_full(sk)) { - err = iucv_path_sever(path, user_data); + err = pr_iucv->path_sever(path, user_data); iucv_path_free(path); goto fail; } @@ -1529,7 +1748,7 @@ static int iucv_callback_connreq(struct iucv_path *path, /* Create the new socket */ nsk = iucv_sock_alloc(NULL, sk->sk_type, GFP_ATOMIC); if (!nsk) { - err = iucv_path_sever(path, user_data); + err = pr_iucv->path_sever(path, user_data); iucv_path_free(path); goto fail; } @@ -1553,9 +1772,9 @@ static int iucv_callback_connreq(struct iucv_path *path, /* set message limit for path based on msglimit of accepting socket */ niucv->msglimit = iucv->msglimit; path->msglim = iucv->msglimit; - err = iucv_path_accept(path, &af_iucv_handler, nuser_data, nsk); + err = pr_iucv->path_accept(path, &af_iucv_handler, nuser_data, nsk); if (err) { - err = iucv_path_sever(path, user_data); + err = pr_iucv->path_sever(path, user_data); iucv_path_free(path); iucv_sock_kill(nsk); goto fail; @@ -1589,7 +1808,7 @@ static void iucv_callback_rx(struct iucv_path *path, struct iucv_message *msg) int len; if (sk->sk_shutdown & RCV_SHUTDOWN) { - iucv_message_reject(path, msg); + pr_iucv->message_reject(path, msg); return; } @@ -1600,7 +1819,7 @@ static void iucv_callback_rx(struct iucv_path *path, struct iucv_message *msg) goto save_message; len = atomic_read(&sk->sk_rmem_alloc); - len += iucv_msg_length(msg) + sizeof(struct sk_buff); + len += SKB_TRUESIZE(iucv_msg_length(msg)); if (len > sk->sk_rcvbuf) goto save_message; @@ -1692,6 +1911,389 @@ static void iucv_callback_shutdown(struct iucv_path *path, u8 ipuser[16]) bh_unlock_sock(sk); } +/***************** HiperSockets transport callbacks ********************/ +static void afiucv_swap_src_dest(struct sk_buff *skb) +{ + struct af_iucv_trans_hdr *trans_hdr = + (struct af_iucv_trans_hdr *)skb->data; + char tmpID[8]; + char tmpName[8]; + + ASCEBC(trans_hdr->destUserID, sizeof(trans_hdr->destUserID)); + ASCEBC(trans_hdr->destAppName, sizeof(trans_hdr->destAppName)); + ASCEBC(trans_hdr->srcUserID, sizeof(trans_hdr->srcUserID)); + ASCEBC(trans_hdr->srcAppName, sizeof(trans_hdr->srcAppName)); + memcpy(tmpID, trans_hdr->srcUserID, 8); + memcpy(tmpName, trans_hdr->srcAppName, 8); + memcpy(trans_hdr->srcUserID, trans_hdr->destUserID, 8); + memcpy(trans_hdr->srcAppName, trans_hdr->destAppName, 8); + memcpy(trans_hdr->destUserID, tmpID, 8); + memcpy(trans_hdr->destAppName, tmpName, 8); + skb_push(skb, ETH_HLEN); + memset(skb->data, 0, ETH_HLEN); +} + +/** + * afiucv_hs_callback_syn - react on received SYN + **/ +static int afiucv_hs_callback_syn(struct sock *sk, struct sk_buff *skb) +{ + struct sock *nsk; + struct iucv_sock *iucv, *niucv; + struct af_iucv_trans_hdr *trans_hdr; + int err; + + iucv = iucv_sk(sk); + trans_hdr = (struct af_iucv_trans_hdr *)skb->data; + if (!iucv) { + /* no sock - connection refused */ + afiucv_swap_src_dest(skb); + trans_hdr->flags = AF_IUCV_FLAG_SYN | AF_IUCV_FLAG_FIN; + err = dev_queue_xmit(skb); + goto out; + } + + nsk = iucv_sock_alloc(NULL, sk->sk_type, GFP_ATOMIC); + bh_lock_sock(sk); + if ((sk->sk_state != IUCV_LISTEN) || + sk_acceptq_is_full(sk) || + !nsk) { + /* error on server socket - connection refused */ + if (nsk) + sk_free(nsk); + afiucv_swap_src_dest(skb); + trans_hdr->flags = AF_IUCV_FLAG_SYN | AF_IUCV_FLAG_FIN; + err = dev_queue_xmit(skb); + bh_unlock_sock(sk); + goto out; + } + + niucv = iucv_sk(nsk); + iucv_sock_init(nsk, sk); + niucv->transport = AF_IUCV_TRANS_HIPER; + niucv->msglimit = iucv->msglimit; + if (!trans_hdr->window) + niucv->msglimit_peer = IUCV_HIPER_MSGLIM_DEFAULT; + else + niucv->msglimit_peer = trans_hdr->window; + memcpy(niucv->dst_name, trans_hdr->srcAppName, 8); + memcpy(niucv->dst_user_id, trans_hdr->srcUserID, 8); + memcpy(niucv->src_name, iucv->src_name, 8); + memcpy(niucv->src_user_id, iucv->src_user_id, 8); + nsk->sk_bound_dev_if = sk->sk_bound_dev_if; + afiucv_swap_src_dest(skb); + trans_hdr->flags = AF_IUCV_FLAG_SYN | AF_IUCV_FLAG_ACK; + trans_hdr->window = niucv->msglimit; + /* if receiver acks the xmit connection is established */ + err = dev_queue_xmit(skb); + if (!err) { + iucv_accept_enqueue(sk, nsk); + nsk->sk_state = IUCV_CONNECTED; + sk->sk_data_ready(sk, 1); + } else + iucv_sock_kill(nsk); + bh_unlock_sock(sk); + +out: + return NET_RX_SUCCESS; +} + +/** + * afiucv_hs_callback_synack() - react on received SYN-ACK + **/ +static int afiucv_hs_callback_synack(struct sock *sk, struct sk_buff *skb) +{ + struct iucv_sock *iucv = iucv_sk(sk); + struct af_iucv_trans_hdr *trans_hdr = + (struct af_iucv_trans_hdr *)skb->data; + + if (!iucv) + goto out; + if (sk->sk_state != IUCV_BOUND) + goto out; + bh_lock_sock(sk); + iucv->msglimit_peer = trans_hdr->window; + sk->sk_state = IUCV_CONNECTED; + sk->sk_state_change(sk); + bh_unlock_sock(sk); +out: + kfree_skb(skb); + return NET_RX_SUCCESS; +} + +/** + * afiucv_hs_callback_synfin() - react on received SYN_FIN + **/ +static int afiucv_hs_callback_synfin(struct sock *sk, struct sk_buff *skb) +{ + struct iucv_sock *iucv = iucv_sk(sk); + + if (!iucv) + goto out; + if (sk->sk_state != IUCV_BOUND) + goto out; + bh_lock_sock(sk); + sk->sk_state = IUCV_DISCONN; + sk->sk_state_change(sk); + bh_unlock_sock(sk); +out: + kfree_skb(skb); + return NET_RX_SUCCESS; +} + +/** + * afiucv_hs_callback_fin() - react on received FIN + **/ +static int afiucv_hs_callback_fin(struct sock *sk, struct sk_buff *skb) +{ + struct iucv_sock *iucv = iucv_sk(sk); + + /* other end of connection closed */ + if (iucv) { + bh_lock_sock(sk); + if (!list_empty(&iucv->accept_q)) + sk->sk_state = IUCV_SEVERED; + else + sk->sk_state = IUCV_DISCONN; + sk->sk_state_change(sk); + bh_unlock_sock(sk); + } + kfree_skb(skb); + return NET_RX_SUCCESS; +} + +/** + * afiucv_hs_callback_win() - react on received WIN + **/ +static int afiucv_hs_callback_win(struct sock *sk, struct sk_buff *skb) +{ + struct iucv_sock *iucv = iucv_sk(sk); + struct af_iucv_trans_hdr *trans_hdr = + (struct af_iucv_trans_hdr *)skb->data; + + if (!iucv) + return NET_RX_SUCCESS; + + if (sk->sk_state != IUCV_CONNECTED) + return NET_RX_SUCCESS; + + atomic_sub(trans_hdr->window, &iucv->msg_sent); + iucv_sock_wake_msglim(sk); + return NET_RX_SUCCESS; +} + +/** + * afiucv_hs_callback_rx() - react on received data + **/ +static int afiucv_hs_callback_rx(struct sock *sk, struct sk_buff *skb) +{ + struct iucv_sock *iucv = iucv_sk(sk); + + if (!iucv) { + kfree_skb(skb); + return NET_RX_SUCCESS; + } + + if (sk->sk_state != IUCV_CONNECTED) { + kfree_skb(skb); + return NET_RX_SUCCESS; + } + + /* write stuff from iucv_msg to skb cb */ + if (skb->len <= sizeof(struct af_iucv_trans_hdr)) { + kfree_skb(skb); + return NET_RX_SUCCESS; + } + skb_pull(skb, sizeof(struct af_iucv_trans_hdr)); + skb_reset_transport_header(skb); + skb_reset_network_header(skb); + spin_lock(&iucv->message_q.lock); + if (skb_queue_empty(&iucv->backlog_skb_q)) { + if (sock_queue_rcv_skb(sk, skb)) { + /* handle rcv queue full */ + skb_queue_tail(&iucv->backlog_skb_q, skb); + } + } else + skb_queue_tail(&iucv_sk(sk)->backlog_skb_q, skb); + spin_unlock(&iucv->message_q.lock); + return NET_RX_SUCCESS; +} + +/** + * afiucv_hs_rcv() - base function for arriving data through HiperSockets + * transport + * called from netif RX softirq + **/ +static int afiucv_hs_rcv(struct sk_buff *skb, struct net_device *dev, + struct packet_type *pt, struct net_device *orig_dev) +{ + struct hlist_node *node; + struct sock *sk; + struct iucv_sock *iucv; + struct af_iucv_trans_hdr *trans_hdr; + char nullstring[8]; + int err = 0; + + skb_pull(skb, ETH_HLEN); + trans_hdr = (struct af_iucv_trans_hdr *)skb->data; + EBCASC(trans_hdr->destAppName, sizeof(trans_hdr->destAppName)); + EBCASC(trans_hdr->destUserID, sizeof(trans_hdr->destUserID)); + EBCASC(trans_hdr->srcAppName, sizeof(trans_hdr->srcAppName)); + EBCASC(trans_hdr->srcUserID, sizeof(trans_hdr->srcUserID)); + memset(nullstring, 0, sizeof(nullstring)); + iucv = NULL; + sk = NULL; + read_lock(&iucv_sk_list.lock); + sk_for_each(sk, node, &iucv_sk_list.head) { + if (trans_hdr->flags == AF_IUCV_FLAG_SYN) { + if ((!memcmp(&iucv_sk(sk)->src_name, + trans_hdr->destAppName, 8)) && + (!memcmp(&iucv_sk(sk)->src_user_id, + trans_hdr->destUserID, 8)) && + (!memcmp(&iucv_sk(sk)->dst_name, nullstring, 8)) && + (!memcmp(&iucv_sk(sk)->dst_user_id, + nullstring, 8))) { + iucv = iucv_sk(sk); + break; + } + } else { + if ((!memcmp(&iucv_sk(sk)->src_name, + trans_hdr->destAppName, 8)) && + (!memcmp(&iucv_sk(sk)->src_user_id, + trans_hdr->destUserID, 8)) && + (!memcmp(&iucv_sk(sk)->dst_name, + trans_hdr->srcAppName, 8)) && + (!memcmp(&iucv_sk(sk)->dst_user_id, + trans_hdr->srcUserID, 8))) { + iucv = iucv_sk(sk); + break; + } + } + } + read_unlock(&iucv_sk_list.lock); + if (!iucv) + sk = NULL; + + /* no sock + how should we send with no sock + 1) send without sock no send rc checking? + 2) introduce default sock to handle this cases + + SYN -> send SYN|ACK in good case, send SYN|FIN in bad case + data -> send FIN + SYN|ACK, SYN|FIN, FIN -> no action? */ + + switch (trans_hdr->flags) { + case AF_IUCV_FLAG_SYN: + /* connect request */ + err = afiucv_hs_callback_syn(sk, skb); + break; + case (AF_IUCV_FLAG_SYN | AF_IUCV_FLAG_ACK): + /* connect request confirmed */ + err = afiucv_hs_callback_synack(sk, skb); + break; + case (AF_IUCV_FLAG_SYN | AF_IUCV_FLAG_FIN): + /* connect request refused */ + err = afiucv_hs_callback_synfin(sk, skb); + break; + case (AF_IUCV_FLAG_FIN): + /* close request */ + err = afiucv_hs_callback_fin(sk, skb); + break; + case (AF_IUCV_FLAG_WIN): + err = afiucv_hs_callback_win(sk, skb); + if (skb->len > sizeof(struct af_iucv_trans_hdr)) + err = afiucv_hs_callback_rx(sk, skb); + else + kfree(skb); + break; + case 0: + /* plain data frame */ + err = afiucv_hs_callback_rx(sk, skb); + break; + default: + ; + } + + return err; +} + +/** + * afiucv_hs_callback_txnotify() - handle send notifcations from HiperSockets + * transport + **/ +static void afiucv_hs_callback_txnotify(struct sk_buff *skb, + enum iucv_tx_notify n) +{ + struct sock *isk = skb->sk; + struct sock *sk = NULL; + struct iucv_sock *iucv = NULL; + struct sk_buff_head *list; + struct sk_buff *list_skb; + struct sk_buff *this = NULL; + unsigned long flags; + struct hlist_node *node; + + read_lock(&iucv_sk_list.lock); + sk_for_each(sk, node, &iucv_sk_list.head) + if (sk == isk) { + iucv = iucv_sk(sk); + break; + } + read_unlock(&iucv_sk_list.lock); + + if (!iucv) + return; + + bh_lock_sock(sk); + list = &iucv->send_skb_q; + list_skb = list->next; + if (skb_queue_empty(list)) + goto out_unlock; + + spin_lock_irqsave(&list->lock, flags); + while (list_skb != (struct sk_buff *)list) { + if (skb_shinfo(list_skb) == skb_shinfo(skb)) { + this = list_skb; + switch (n) { + case TX_NOTIFY_OK: + __skb_unlink(this, list); + iucv_sock_wake_msglim(sk); + kfree_skb(this); + break; + case TX_NOTIFY_PENDING: + atomic_inc(&iucv->pendings); + break; + case TX_NOTIFY_DELAYED_OK: + __skb_unlink(this, list); + atomic_dec(&iucv->pendings); + if (atomic_read(&iucv->pendings) <= 0) + iucv_sock_wake_msglim(sk); + kfree_skb(this); + break; + case TX_NOTIFY_UNREACHABLE: + case TX_NOTIFY_DELAYED_UNREACHABLE: + case TX_NOTIFY_TPQFULL: /* not yet used */ + case TX_NOTIFY_GENERALERROR: + case TX_NOTIFY_DELAYED_GENERALERROR: + __skb_unlink(this, list); + kfree_skb(this); + if (!list_empty(&iucv->accept_q)) + sk->sk_state = IUCV_SEVERED; + else + sk->sk_state = IUCV_DISCONN; + sk->sk_state_change(sk); + break; + } + break; + } + list_skb = list_skb->next; + } + spin_unlock_irqrestore(&list->lock, flags); + +out_unlock: + bh_unlock_sock(sk); +} static const struct proto_ops iucv_sock_ops = { .family = PF_IUCV, .owner = THIS_MODULE, @@ -1718,71 +2320,104 @@ static const struct net_proto_family iucv_sock_family_ops = { .create = iucv_sock_create, }; -static int __init afiucv_init(void) +static struct packet_type iucv_packet_type = { + .type = cpu_to_be16(ETH_P_AF_IUCV), + .func = afiucv_hs_rcv, +}; + +static int afiucv_iucv_init(void) { int err; - if (!MACHINE_IS_VM) { - pr_err("The af_iucv module cannot be loaded" - " without z/VM\n"); - err = -EPROTONOSUPPORT; - goto out; - } - cpcmd("QUERY USERID", iucv_userid, sizeof(iucv_userid), &err); - if (unlikely(err)) { - WARN_ON(err); - err = -EPROTONOSUPPORT; - goto out; - } - - err = iucv_register(&af_iucv_handler, 0); + err = pr_iucv->iucv_register(&af_iucv_handler, 0); if (err) goto out; - err = proto_register(&iucv_proto, 0); - if (err) - goto out_iucv; - err = sock_register(&iucv_sock_family_ops); - if (err) - goto out_proto; /* establish dummy device */ + af_iucv_driver.bus = pr_iucv->bus; err = driver_register(&af_iucv_driver); if (err) - goto out_sock; + goto out_iucv; af_iucv_dev = kzalloc(sizeof(struct device), GFP_KERNEL); if (!af_iucv_dev) { err = -ENOMEM; goto out_driver; } dev_set_name(af_iucv_dev, "af_iucv"); - af_iucv_dev->bus = &iucv_bus; - af_iucv_dev->parent = iucv_root; + af_iucv_dev->bus = pr_iucv->bus; + af_iucv_dev->parent = pr_iucv->root; af_iucv_dev->release = (void (*)(struct device *))kfree; af_iucv_dev->driver = &af_iucv_driver; err = device_register(af_iucv_dev); if (err) goto out_driver; - return 0; out_driver: driver_unregister(&af_iucv_driver); +out_iucv: + pr_iucv->iucv_unregister(&af_iucv_handler, 0); +out: + return err; +} + +static int __init afiucv_init(void) +{ + int err; + + if (MACHINE_IS_VM) { + cpcmd("QUERY USERID", iucv_userid, sizeof(iucv_userid), &err); + if (unlikely(err)) { + WARN_ON(err); + err = -EPROTONOSUPPORT; + goto out; + } + + pr_iucv = try_then_request_module(symbol_get(iucv_if), "iucv"); + if (!pr_iucv) { + printk(KERN_WARNING "iucv_if lookup failed\n"); + memset(&iucv_userid, 0, sizeof(iucv_userid)); + } + } else { + memset(&iucv_userid, 0, sizeof(iucv_userid)); + pr_iucv = NULL; + } + + err = proto_register(&iucv_proto, 0); + if (err) + goto out; + err = sock_register(&iucv_sock_family_ops); + if (err) + goto out_proto; + + if (pr_iucv) { + err = afiucv_iucv_init(); + if (err) + goto out_sock; + } + dev_add_pack(&iucv_packet_type); + return 0; + out_sock: sock_unregister(PF_IUCV); out_proto: proto_unregister(&iucv_proto); -out_iucv: - iucv_unregister(&af_iucv_handler, 0); out: + if (pr_iucv) + symbol_put(iucv_if); return err; } static void __exit afiucv_exit(void) { - device_unregister(af_iucv_dev); - driver_unregister(&af_iucv_driver); + if (pr_iucv) { + device_unregister(af_iucv_dev); + driver_unregister(&af_iucv_driver); + pr_iucv->iucv_unregister(&af_iucv_handler, 0); + symbol_put(iucv_if); + } + dev_remove_pack(&iucv_packet_type); sock_unregister(PF_IUCV); proto_unregister(&iucv_proto); - iucv_unregister(&af_iucv_handler, 0); } module_init(afiucv_init); @@ -1793,3 +2428,4 @@ MODULE_DESCRIPTION("IUCV Sockets ver " VERSION); MODULE_VERSION(VERSION); MODULE_LICENSE("GPL"); MODULE_ALIAS_NETPROTO(PF_IUCV); + diff --git a/net/iucv/iucv.c b/net/iucv/iucv.c index 075a3808aa40..403be43b793d 100644 --- a/net/iucv/iucv.c +++ b/net/iucv/iucv.c @@ -1974,6 +1974,27 @@ out: return rc; } +struct iucv_interface iucv_if = { + .message_receive = iucv_message_receive, + .__message_receive = __iucv_message_receive, + .message_reply = iucv_message_reply, + .message_reject = iucv_message_reject, + .message_send = iucv_message_send, + .__message_send = __iucv_message_send, + .message_send2way = iucv_message_send2way, + .message_purge = iucv_message_purge, + .path_accept = iucv_path_accept, + .path_connect = iucv_path_connect, + .path_quiesce = iucv_path_quiesce, + .path_resume = iucv_path_resume, + .path_sever = iucv_path_sever, + .iucv_register = iucv_register, + .iucv_unregister = iucv_unregister, + .bus = NULL, + .root = NULL, +}; +EXPORT_SYMBOL(iucv_if); + /** * iucv_init * @@ -2038,6 +2059,8 @@ static int __init iucv_init(void) rc = bus_register(&iucv_bus); if (rc) goto out_reboot; + iucv_if.root = iucv_root; + iucv_if.bus = &iucv_bus; return 0; out_reboot: |