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The accept_queue of an af_iucv socket will be corrupted, if adding and deleting of entries in this queue occurs at the same time (connect request from one client, while accept call is processed for another client). Solution: add locking when updating accept_q Signed-off-by: Ursula Braun <braunu@de.ibm.com> Acked-by: Frank Pavlic <fpavlic@de.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
110 lines
3.1 KiB
C
110 lines
3.1 KiB
C
/*
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* Copyright 2006 IBM Corporation
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* IUCV protocol stack for Linux on zSeries
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* Version 1.0
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* Author(s): Jennifer Hunt <jenhunt@us.ibm.com>
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*
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*/
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#ifndef __AFIUCV_H
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#define __AFIUCV_H
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#include <asm/types.h>
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#include <asm/byteorder.h>
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#include <linux/list.h>
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#include <linux/poll.h>
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#include <linux/socket.h>
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#ifndef AF_IUCV
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#define AF_IUCV 32
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#define PF_IUCV AF_IUCV
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#endif
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/* Connection and socket states */
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enum {
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IUCV_CONNECTED = 1,
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IUCV_OPEN,
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IUCV_BOUND,
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IUCV_LISTEN,
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IUCV_SEVERED,
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IUCV_DISCONN,
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IUCV_CLOSING,
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IUCV_CLOSED
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};
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#define IUCV_QUEUELEN_DEFAULT 65535
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#define IUCV_CONN_TIMEOUT (HZ * 40)
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#define IUCV_DISCONN_TIMEOUT (HZ * 2)
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#define IUCV_CONN_IDLE_TIMEOUT (HZ * 60)
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#define IUCV_BUFSIZE_DEFAULT 32768
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/* IUCV socket address */
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struct sockaddr_iucv {
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sa_family_t siucv_family;
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unsigned short siucv_port; /* Reserved */
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unsigned int siucv_addr; /* Reserved */
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char siucv_nodeid[8]; /* Reserved */
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char siucv_user_id[8]; /* Guest User Id */
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char siucv_name[8]; /* Application Name */
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};
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/* Common socket structures and functions */
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#define iucv_sk(__sk) ((struct iucv_sock *) __sk)
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struct iucv_sock {
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struct sock sk;
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char src_user_id[8];
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char src_name[8];
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char dst_user_id[8];
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char dst_name[8];
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struct list_head accept_q;
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spinlock_t accept_q_lock;
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struct sock *parent;
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struct iucv_path *path;
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struct sk_buff_head send_skb_q;
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struct sk_buff_head backlog_skb_q;
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unsigned int send_tag;
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};
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struct iucv_sock_list {
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struct hlist_head head;
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rwlock_t lock;
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atomic_t autobind_name;
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};
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static void iucv_sock_destruct(struct sock *sk);
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static void iucv_sock_cleanup_listen(struct sock *parent);
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static void iucv_sock_kill(struct sock *sk);
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static void iucv_sock_close(struct sock *sk);
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static int iucv_sock_create(struct socket *sock, int proto);
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static int iucv_sock_bind(struct socket *sock, struct sockaddr *addr,
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int addr_len);
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static int iucv_sock_connect(struct socket *sock, struct sockaddr *addr,
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int alen, int flags);
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static int iucv_sock_listen(struct socket *sock, int backlog);
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static int iucv_sock_accept(struct socket *sock, struct socket *newsock,
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int flags);
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static int iucv_sock_getname(struct socket *sock, struct sockaddr *addr,
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int *len, int peer);
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static int iucv_sock_sendmsg(struct kiocb *iocb, struct socket *sock,
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struct msghdr *msg, size_t len);
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static int iucv_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
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struct msghdr *msg, size_t len, int flags);
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unsigned int iucv_sock_poll(struct file *file, struct socket *sock,
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poll_table *wait);
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static int iucv_sock_release(struct socket *sock);
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static int iucv_sock_shutdown(struct socket *sock, int how);
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void iucv_sock_link(struct iucv_sock_list *l, struct sock *s);
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void iucv_sock_unlink(struct iucv_sock_list *l, struct sock *s);
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int iucv_sock_wait_state(struct sock *sk, int state, int state2,
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unsigned long timeo);
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int iucv_sock_wait_cnt(struct sock *sk, unsigned long timeo);
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void iucv_accept_enqueue(struct sock *parent, struct sock *sk);
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void iucv_accept_unlink(struct sock *sk);
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struct sock *iucv_accept_dequeue(struct sock *parent, struct socket *newsock);
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#endif /* __IUCV_H */
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