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f9c41a62bb
When receiving data messages, the "BUG_ON(skb->len < skb->data_len)" in the skb_pull() function triggers a kernel panic. Replace the skb_pull logic by a per skb offset as advised by Eric Dumazet. Signed-off-by: Ursula Braun <ursula.braun@de.ibm.com> Signed-off-by: Frank Blaschka <blaschka@linux.vnet.ibm.com> Reviewed-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
164 lines
4.1 KiB
C
164 lines
4.1 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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#include <net/iucv/iucv.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_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_HIPER_MSGLIM_DEFAULT 128
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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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struct sock_msg_q {
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struct iucv_path *path;
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struct iucv_message msg;
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struct list_head list;
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spinlock_t lock;
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};
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#define AF_IUCV_FLAG_ACK 0x1
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#define AF_IUCV_FLAG_SYN 0x2
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#define AF_IUCV_FLAG_FIN 0x4
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#define AF_IUCV_FLAG_WIN 0x8
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#define AF_IUCV_FLAG_SHT 0x10
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struct af_iucv_trans_hdr {
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u16 magic;
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u8 version;
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u8 flags;
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u16 window;
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char destNodeID[8];
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char destUserID[8];
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char destAppName[16];
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char srcNodeID[8];
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char srcUserID[8];
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char srcAppName[16]; /* => 70 bytes */
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struct iucv_message iucv_hdr; /* => 33 bytes */
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u8 pad; /* total 104 bytes */
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} __packed;
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enum iucv_tx_notify {
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/* transmission of skb is completed and was successful */
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TX_NOTIFY_OK = 0,
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/* target is unreachable */
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TX_NOTIFY_UNREACHABLE = 1,
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/* transfer pending queue full */
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TX_NOTIFY_TPQFULL = 2,
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/* general error */
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TX_NOTIFY_GENERALERROR = 3,
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/* transmission of skb is pending - may interleave
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* with TX_NOTIFY_DELAYED_* */
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TX_NOTIFY_PENDING = 4,
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/* transmission of skb was done successfully (delayed) */
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TX_NOTIFY_DELAYED_OK = 5,
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/* target unreachable (detected delayed) */
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TX_NOTIFY_DELAYED_UNREACHABLE = 6,
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/* general error (detected delayed) */
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TX_NOTIFY_DELAYED_GENERALERROR = 7,
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};
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#define iucv_sk(__sk) ((struct iucv_sock *) __sk)
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#define AF_IUCV_TRANS_IUCV 0
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#define AF_IUCV_TRANS_HIPER 1
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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 net_device *hs_dev;
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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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struct sock_msg_q message_q;
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unsigned int send_tag;
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u8 flags;
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u16 msglimit;
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u16 msglimit_peer;
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atomic_t msg_sent;
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atomic_t msg_recv;
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atomic_t pendings;
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int transport;
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void (*sk_txnotify)(struct sk_buff *skb,
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enum iucv_tx_notify n);
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};
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struct iucv_skb_cb {
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u32 class; /* target class of message */
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u32 tag; /* tag associated with message */
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u32 offset; /* offset for skb receival */
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};
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#define IUCV_SKB_CB(__skb) ((struct iucv_skb_cb *)&((__skb)->cb[0]))
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/* iucv socket options (SOL_IUCV) */
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#define SO_IPRMDATA_MSG 0x0080 /* send/recv IPRM_DATA msgs */
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#define SO_MSGLIMIT 0x1000 /* get/set IUCV MSGLIMIT */
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#define SO_MSGSIZE 0x0800 /* get maximum msgsize */
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/* iucv related control messages (scm) */
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#define SCM_IUCV_TRGCLS 0x0001 /* target class control message */
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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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unsigned int iucv_sock_poll(struct file *file, struct socket *sock,
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poll_table *wait);
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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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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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