forked from mirrors/linux
ad7eab2ab0
In order to further reduce the scope of ndo_do_ioctl(), move out the SIOCWANDEV handling into a new network device operation function. Adjust the prototype to only pass the if_settings sub-structure in place of the ifreq, and remove the redundant 'cmd' argument in the process. Cc: Krzysztof Halasa <khc@pm.waw.pl> Cc: "Jan \"Yenya\" Kasprzak" <kas@fi.muni.cz> Cc: Kevin Curtis <kevin.curtis@farsite.co.uk> Cc: Zhao Qiang <qiang.zhao@nxp.com> Cc: Martin Schiller <ms@dev.tdt.de> Cc: Jiri Slaby <jirislaby@kernel.org> Cc: linux-x25@vger.kernel.org Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: David S. Miller <davem@davemloft.net>
115 lines
3.2 KiB
C
115 lines
3.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Generic HDLC support routines for Linux
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*
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* Copyright (C) 1999-2005 Krzysztof Halasa <khc@pm.waw.pl>
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*/
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#ifndef __HDLC_H
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#define __HDLC_H
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#include <linux/skbuff.h>
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#include <linux/netdevice.h>
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#include <linux/hdlc/ioctl.h>
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#include <uapi/linux/hdlc.h>
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/* This structure is a private property of HDLC protocols.
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Hardware drivers have no interest here */
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struct hdlc_proto {
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int (*open)(struct net_device *dev);
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void (*close)(struct net_device *dev);
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void (*start)(struct net_device *dev); /* if open & DCD */
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void (*stop)(struct net_device *dev); /* if open & !DCD */
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void (*detach)(struct net_device *dev);
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int (*ioctl)(struct net_device *dev, struct if_settings *ifs);
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__be16 (*type_trans)(struct sk_buff *skb, struct net_device *dev);
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int (*netif_rx)(struct sk_buff *skb);
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netdev_tx_t (*xmit)(struct sk_buff *skb, struct net_device *dev);
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struct module *module;
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struct hdlc_proto *next; /* next protocol in the list */
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};
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/* Pointed to by netdev_priv(dev) */
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typedef struct hdlc_device {
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/* used by HDLC layer to take control over HDLC device from hw driver*/
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int (*attach)(struct net_device *dev,
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unsigned short encoding, unsigned short parity);
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/* hardware driver must handle this instead of dev->hard_start_xmit */
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netdev_tx_t (*xmit)(struct sk_buff *skb, struct net_device *dev);
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/* Things below are for HDLC layer internal use only */
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const struct hdlc_proto *proto;
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int carrier;
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int open;
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spinlock_t state_lock;
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void *state;
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void *priv;
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} hdlc_device;
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/* Exported from hdlc module */
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/* Called by hardware driver when a user requests HDLC service */
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int hdlc_ioctl(struct net_device *dev, struct if_settings *ifs);
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/* Must be used by hardware driver on module startup/exit */
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#define register_hdlc_device(dev) register_netdev(dev)
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void unregister_hdlc_device(struct net_device *dev);
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void register_hdlc_protocol(struct hdlc_proto *proto);
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void unregister_hdlc_protocol(struct hdlc_proto *proto);
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struct net_device *alloc_hdlcdev(void *priv);
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static inline struct hdlc_device* dev_to_hdlc(struct net_device *dev)
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{
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return netdev_priv(dev);
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}
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static __inline__ void debug_frame(const struct sk_buff *skb)
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{
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int i;
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for (i=0; i < skb->len; i++) {
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if (i == 100) {
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printk("...\n");
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return;
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}
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printk(" %02X", skb->data[i]);
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}
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printk("\n");
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}
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/* Must be called by hardware driver when HDLC device is being opened */
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int hdlc_open(struct net_device *dev);
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/* Must be called by hardware driver when HDLC device is being closed */
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void hdlc_close(struct net_device *dev);
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/* Must be pointed to by hw driver's dev->netdev_ops->ndo_start_xmit */
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netdev_tx_t hdlc_start_xmit(struct sk_buff *skb, struct net_device *dev);
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int attach_hdlc_protocol(struct net_device *dev, struct hdlc_proto *proto,
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size_t size);
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/* May be used by hardware driver to gain control over HDLC device */
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int detach_hdlc_protocol(struct net_device *dev);
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static __inline__ __be16 hdlc_type_trans(struct sk_buff *skb,
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struct net_device *dev)
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{
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hdlc_device *hdlc = dev_to_hdlc(dev);
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skb->dev = dev;
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skb_reset_mac_header(skb);
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if (hdlc->proto->type_trans)
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return hdlc->proto->type_trans(skb, dev);
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else
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return htons(ETH_P_HDLC);
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}
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#endif /* __HDLC_H */
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