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1435 lines
32 KiB
1435 lines
32 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* DECnet An implementation of the DECnet protocol suite for the LINUX |
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* operating system. DECnet is implemented using the BSD Socket |
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* interface as the means of communication with the user level. |
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* |
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* DECnet Device Layer |
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* |
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* Authors: Steve Whitehouse <[email protected]> |
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* Eduardo Marcelo Serrat <[email protected]> |
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* |
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* Changes: |
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* Steve Whitehouse : Devices now see incoming frames so they |
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* can mark on who it came from. |
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* Steve Whitehouse : Fixed bug in creating neighbours. Each neighbour |
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* can now have a device specific setup func. |
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* Steve Whitehouse : Added /proc/sys/net/decnet/conf/<dev>/ |
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* Steve Whitehouse : Fixed bug which sometimes killed timer |
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* Steve Whitehouse : Multiple ifaddr support |
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* Steve Whitehouse : SIOCGIFCONF is now a compile time option |
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* Steve Whitehouse : /proc/sys/net/decnet/conf/<sys>/forwarding |
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* Steve Whitehouse : Removed timer1 - it's a user space issue now |
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* Patrick Caulfield : Fixed router hello message format |
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* Steve Whitehouse : Got rid of constant sizes for blksize for |
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* devices. All mtu based now. |
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*/ |
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|
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#include <linux/capability.h> |
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#include <linux/module.h> |
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#include <linux/moduleparam.h> |
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#include <linux/init.h> |
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#include <linux/net.h> |
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#include <linux/netdevice.h> |
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#include <linux/proc_fs.h> |
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#include <linux/seq_file.h> |
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#include <linux/timer.h> |
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#include <linux/string.h> |
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#include <linux/if_addr.h> |
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#include <linux/if_arp.h> |
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#include <linux/if_ether.h> |
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#include <linux/skbuff.h> |
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#include <linux/sysctl.h> |
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#include <linux/notifier.h> |
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#include <linux/slab.h> |
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#include <linux/jiffies.h> |
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#include <linux/uaccess.h> |
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#include <net/net_namespace.h> |
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#include <net/neighbour.h> |
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#include <net/dst.h> |
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#include <net/flow.h> |
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#include <net/fib_rules.h> |
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#include <net/netlink.h> |
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#include <net/dn.h> |
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#include <net/dn_dev.h> |
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#include <net/dn_route.h> |
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#include <net/dn_neigh.h> |
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#include <net/dn_fib.h> |
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|
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#define DN_IFREQ_SIZE (offsetof(struct ifreq, ifr_ifru) + sizeof(struct sockaddr_dn)) |
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|
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static char dn_rt_all_end_mcast[ETH_ALEN] = {0xAB,0x00,0x00,0x04,0x00,0x00}; |
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static char dn_rt_all_rt_mcast[ETH_ALEN] = {0xAB,0x00,0x00,0x03,0x00,0x00}; |
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static char dn_hiord[ETH_ALEN] = {0xAA,0x00,0x04,0x00,0x00,0x00}; |
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static unsigned char dn_eco_version[3] = {0x02,0x00,0x00}; |
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|
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extern struct neigh_table dn_neigh_table; |
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|
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/* |
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* decnet_address is kept in network order. |
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*/ |
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__le16 decnet_address = 0; |
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|
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static DEFINE_SPINLOCK(dndev_lock); |
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static struct net_device *decnet_default_device; |
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static BLOCKING_NOTIFIER_HEAD(dnaddr_chain); |
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|
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static struct dn_dev *dn_dev_create(struct net_device *dev, int *err); |
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static void dn_dev_delete(struct net_device *dev); |
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static void dn_ifaddr_notify(int event, struct dn_ifaddr *ifa); |
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|
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static int dn_eth_up(struct net_device *); |
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static void dn_eth_down(struct net_device *); |
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static void dn_send_brd_hello(struct net_device *dev, struct dn_ifaddr *ifa); |
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static void dn_send_ptp_hello(struct net_device *dev, struct dn_ifaddr *ifa); |
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|
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static struct dn_dev_parms dn_dev_list[] = { |
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{ |
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.type = ARPHRD_ETHER, /* Ethernet */ |
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.mode = DN_DEV_BCAST, |
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.state = DN_DEV_S_RU, |
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.t2 = 1, |
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.t3 = 10, |
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.name = "ethernet", |
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.up = dn_eth_up, |
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.down = dn_eth_down, |
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.timer3 = dn_send_brd_hello, |
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}, |
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{ |
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.type = ARPHRD_IPGRE, /* DECnet tunneled over GRE in IP */ |
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.mode = DN_DEV_BCAST, |
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.state = DN_DEV_S_RU, |
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.t2 = 1, |
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.t3 = 10, |
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.name = "ipgre", |
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.timer3 = dn_send_brd_hello, |
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}, |
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#if 0 |
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{ |
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.type = ARPHRD_X25, /* Bog standard X.25 */ |
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.mode = DN_DEV_UCAST, |
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.state = DN_DEV_S_DS, |
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.t2 = 1, |
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.t3 = 120, |
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.name = "x25", |
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.timer3 = dn_send_ptp_hello, |
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}, |
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#endif |
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#if 0 |
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{ |
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.type = ARPHRD_PPP, /* DECnet over PPP */ |
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.mode = DN_DEV_BCAST, |
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.state = DN_DEV_S_RU, |
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.t2 = 1, |
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.t3 = 10, |
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.name = "ppp", |
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.timer3 = dn_send_brd_hello, |
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}, |
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#endif |
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{ |
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.type = ARPHRD_DDCMP, /* DECnet over DDCMP */ |
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.mode = DN_DEV_UCAST, |
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.state = DN_DEV_S_DS, |
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.t2 = 1, |
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.t3 = 120, |
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.name = "ddcmp", |
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.timer3 = dn_send_ptp_hello, |
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}, |
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{ |
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.type = ARPHRD_LOOPBACK, /* Loopback interface - always last */ |
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.mode = DN_DEV_BCAST, |
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.state = DN_DEV_S_RU, |
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.t2 = 1, |
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.t3 = 10, |
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.name = "loopback", |
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.timer3 = dn_send_brd_hello, |
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} |
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}; |
|
|
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#define DN_DEV_LIST_SIZE ARRAY_SIZE(dn_dev_list) |
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|
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#define DN_DEV_PARMS_OFFSET(x) offsetof(struct dn_dev_parms, x) |
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|
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#ifdef CONFIG_SYSCTL |
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|
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static int min_t2[] = { 1 }; |
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static int max_t2[] = { 60 }; /* No max specified, but this seems sensible */ |
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static int min_t3[] = { 1 }; |
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static int max_t3[] = { 8191 }; /* Must fit in 16 bits when multiplied by BCT3MULT or T3MULT */ |
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|
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static int min_priority[1]; |
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static int max_priority[] = { 127 }; /* From DECnet spec */ |
|
|
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static int dn_forwarding_proc(struct ctl_table *, int, void *, size_t *, |
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loff_t *); |
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static struct dn_dev_sysctl_table { |
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struct ctl_table_header *sysctl_header; |
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struct ctl_table dn_dev_vars[5]; |
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} dn_dev_sysctl = { |
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NULL, |
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{ |
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{ |
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.procname = "forwarding", |
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.data = (void *)DN_DEV_PARMS_OFFSET(forwarding), |
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.maxlen = sizeof(int), |
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.mode = 0644, |
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.proc_handler = dn_forwarding_proc, |
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}, |
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{ |
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.procname = "priority", |
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.data = (void *)DN_DEV_PARMS_OFFSET(priority), |
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.maxlen = sizeof(int), |
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.mode = 0644, |
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.proc_handler = proc_dointvec_minmax, |
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.extra1 = &min_priority, |
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.extra2 = &max_priority |
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}, |
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{ |
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.procname = "t2", |
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.data = (void *)DN_DEV_PARMS_OFFSET(t2), |
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.maxlen = sizeof(int), |
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.mode = 0644, |
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.proc_handler = proc_dointvec_minmax, |
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.extra1 = &min_t2, |
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.extra2 = &max_t2 |
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}, |
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{ |
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.procname = "t3", |
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.data = (void *)DN_DEV_PARMS_OFFSET(t3), |
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.maxlen = sizeof(int), |
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.mode = 0644, |
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.proc_handler = proc_dointvec_minmax, |
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.extra1 = &min_t3, |
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.extra2 = &max_t3 |
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}, |
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{ } |
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}, |
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}; |
|
|
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static void dn_dev_sysctl_register(struct net_device *dev, struct dn_dev_parms *parms) |
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{ |
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struct dn_dev_sysctl_table *t; |
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int i; |
|
|
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char path[sizeof("net/decnet/conf/") + IFNAMSIZ]; |
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|
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t = kmemdup(&dn_dev_sysctl, sizeof(*t), GFP_KERNEL); |
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if (t == NULL) |
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return; |
|
|
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for(i = 0; i < ARRAY_SIZE(t->dn_dev_vars) - 1; i++) { |
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long offset = (long)t->dn_dev_vars[i].data; |
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t->dn_dev_vars[i].data = ((char *)parms) + offset; |
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} |
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|
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snprintf(path, sizeof(path), "net/decnet/conf/%s", |
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dev? dev->name : parms->name); |
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|
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t->dn_dev_vars[0].extra1 = (void *)dev; |
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|
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t->sysctl_header = register_net_sysctl(&init_net, path, t->dn_dev_vars); |
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if (t->sysctl_header == NULL) |
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kfree(t); |
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else |
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parms->sysctl = t; |
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} |
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|
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static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms) |
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{ |
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if (parms->sysctl) { |
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struct dn_dev_sysctl_table *t = parms->sysctl; |
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parms->sysctl = NULL; |
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unregister_net_sysctl_table(t->sysctl_header); |
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kfree(t); |
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} |
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} |
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|
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static int dn_forwarding_proc(struct ctl_table *table, int write, |
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void *buffer, size_t *lenp, loff_t *ppos) |
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{ |
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#ifdef CONFIG_DECNET_ROUTER |
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struct net_device *dev = table->extra1; |
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struct dn_dev *dn_db; |
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int err; |
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int tmp, old; |
|
|
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if (table->extra1 == NULL) |
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return -EINVAL; |
|
|
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dn_db = rcu_dereference_raw(dev->dn_ptr); |
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old = dn_db->parms.forwarding; |
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|
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err = proc_dointvec(table, write, buffer, lenp, ppos); |
|
|
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if ((err >= 0) && write) { |
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if (dn_db->parms.forwarding < 0) |
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dn_db->parms.forwarding = 0; |
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if (dn_db->parms.forwarding > 2) |
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dn_db->parms.forwarding = 2; |
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/* |
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* What an ugly hack this is... its works, just. It |
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* would be nice if sysctl/proc were just that little |
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* bit more flexible so I don't have to write a special |
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* routine, or suffer hacks like this - SJW |
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*/ |
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tmp = dn_db->parms.forwarding; |
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dn_db->parms.forwarding = old; |
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if (dn_db->parms.down) |
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dn_db->parms.down(dev); |
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dn_db->parms.forwarding = tmp; |
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if (dn_db->parms.up) |
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dn_db->parms.up(dev); |
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} |
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|
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return err; |
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#else |
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return -EINVAL; |
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#endif |
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} |
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|
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#else /* CONFIG_SYSCTL */ |
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static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms) |
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{ |
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} |
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static void dn_dev_sysctl_register(struct net_device *dev, struct dn_dev_parms *parms) |
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{ |
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} |
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|
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#endif /* CONFIG_SYSCTL */ |
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|
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static inline __u16 mtu2blksize(struct net_device *dev) |
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{ |
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u32 blksize = dev->mtu; |
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if (blksize > 0xffff) |
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blksize = 0xffff; |
|
|
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if (dev->type == ARPHRD_ETHER || |
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dev->type == ARPHRD_PPP || |
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dev->type == ARPHRD_IPGRE || |
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dev->type == ARPHRD_LOOPBACK) |
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blksize -= 2; |
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|
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return (__u16)blksize; |
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} |
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|
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static struct dn_ifaddr *dn_dev_alloc_ifa(void) |
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{ |
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struct dn_ifaddr *ifa; |
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|
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ifa = kzalloc(sizeof(*ifa), GFP_KERNEL); |
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|
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return ifa; |
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} |
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|
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static void dn_dev_free_ifa(struct dn_ifaddr *ifa) |
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{ |
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kfree_rcu(ifa, rcu); |
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} |
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|
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static void dn_dev_del_ifa(struct dn_dev *dn_db, struct dn_ifaddr __rcu **ifap, int destroy) |
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{ |
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struct dn_ifaddr *ifa1 = rtnl_dereference(*ifap); |
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unsigned char mac_addr[6]; |
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struct net_device *dev = dn_db->dev; |
|
|
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ASSERT_RTNL(); |
|
|
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*ifap = ifa1->ifa_next; |
|
|
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if (dn_db->dev->type == ARPHRD_ETHER) { |
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if (ifa1->ifa_local != dn_eth2dn(dev->dev_addr)) { |
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dn_dn2eth(mac_addr, ifa1->ifa_local); |
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dev_mc_del(dev, mac_addr); |
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} |
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} |
|
|
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dn_ifaddr_notify(RTM_DELADDR, ifa1); |
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blocking_notifier_call_chain(&dnaddr_chain, NETDEV_DOWN, ifa1); |
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if (destroy) { |
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dn_dev_free_ifa(ifa1); |
|
|
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if (dn_db->ifa_list == NULL) |
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dn_dev_delete(dn_db->dev); |
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} |
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} |
|
|
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static int dn_dev_insert_ifa(struct dn_dev *dn_db, struct dn_ifaddr *ifa) |
|
{ |
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struct net_device *dev = dn_db->dev; |
|
struct dn_ifaddr *ifa1; |
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unsigned char mac_addr[6]; |
|
|
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ASSERT_RTNL(); |
|
|
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/* Check for duplicates */ |
|
for (ifa1 = rtnl_dereference(dn_db->ifa_list); |
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ifa1 != NULL; |
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ifa1 = rtnl_dereference(ifa1->ifa_next)) { |
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if (ifa1->ifa_local == ifa->ifa_local) |
|
return -EEXIST; |
|
} |
|
|
|
if (dev->type == ARPHRD_ETHER) { |
|
if (ifa->ifa_local != dn_eth2dn(dev->dev_addr)) { |
|
dn_dn2eth(mac_addr, ifa->ifa_local); |
|
dev_mc_add(dev, mac_addr); |
|
} |
|
} |
|
|
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ifa->ifa_next = dn_db->ifa_list; |
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rcu_assign_pointer(dn_db->ifa_list, ifa); |
|
|
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dn_ifaddr_notify(RTM_NEWADDR, ifa); |
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blocking_notifier_call_chain(&dnaddr_chain, NETDEV_UP, ifa); |
|
|
|
return 0; |
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} |
|
|
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static int dn_dev_set_ifa(struct net_device *dev, struct dn_ifaddr *ifa) |
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{ |
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struct dn_dev *dn_db = rtnl_dereference(dev->dn_ptr); |
|
int rv; |
|
|
|
if (dn_db == NULL) { |
|
int err; |
|
dn_db = dn_dev_create(dev, &err); |
|
if (dn_db == NULL) |
|
return err; |
|
} |
|
|
|
ifa->ifa_dev = dn_db; |
|
|
|
if (dev->flags & IFF_LOOPBACK) |
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ifa->ifa_scope = RT_SCOPE_HOST; |
|
|
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rv = dn_dev_insert_ifa(dn_db, ifa); |
|
if (rv) |
|
dn_dev_free_ifa(ifa); |
|
return rv; |
|
} |
|
|
|
|
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int dn_dev_ioctl(unsigned int cmd, void __user *arg) |
|
{ |
|
char buffer[DN_IFREQ_SIZE]; |
|
struct ifreq *ifr = (struct ifreq *)buffer; |
|
struct sockaddr_dn *sdn = (struct sockaddr_dn *)&ifr->ifr_addr; |
|
struct dn_dev *dn_db; |
|
struct net_device *dev; |
|
struct dn_ifaddr *ifa = NULL; |
|
struct dn_ifaddr __rcu **ifap = NULL; |
|
int ret = 0; |
|
|
|
if (copy_from_user(ifr, arg, DN_IFREQ_SIZE)) |
|
return -EFAULT; |
|
ifr->ifr_name[IFNAMSIZ-1] = 0; |
|
|
|
dev_load(&init_net, ifr->ifr_name); |
|
|
|
switch (cmd) { |
|
case SIOCGIFADDR: |
|
break; |
|
case SIOCSIFADDR: |
|
if (!capable(CAP_NET_ADMIN)) |
|
return -EACCES; |
|
if (sdn->sdn_family != AF_DECnet) |
|
return -EINVAL; |
|
break; |
|
default: |
|
return -EINVAL; |
|
} |
|
|
|
rtnl_lock(); |
|
|
|
if ((dev = __dev_get_by_name(&init_net, ifr->ifr_name)) == NULL) { |
|
ret = -ENODEV; |
|
goto done; |
|
} |
|
|
|
if ((dn_db = rtnl_dereference(dev->dn_ptr)) != NULL) { |
|
for (ifap = &dn_db->ifa_list; |
|
(ifa = rtnl_dereference(*ifap)) != NULL; |
|
ifap = &ifa->ifa_next) |
|
if (strcmp(ifr->ifr_name, ifa->ifa_label) == 0) |
|
break; |
|
} |
|
|
|
if (ifa == NULL && cmd != SIOCSIFADDR) { |
|
ret = -EADDRNOTAVAIL; |
|
goto done; |
|
} |
|
|
|
switch (cmd) { |
|
case SIOCGIFADDR: |
|
*((__le16 *)sdn->sdn_nodeaddr) = ifa->ifa_local; |
|
if (copy_to_user(arg, ifr, DN_IFREQ_SIZE)) |
|
ret = -EFAULT; |
|
break; |
|
|
|
case SIOCSIFADDR: |
|
if (!ifa) { |
|
if ((ifa = dn_dev_alloc_ifa()) == NULL) { |
|
ret = -ENOBUFS; |
|
break; |
|
} |
|
memcpy(ifa->ifa_label, dev->name, IFNAMSIZ); |
|
} else { |
|
if (ifa->ifa_local == dn_saddr2dn(sdn)) |
|
break; |
|
dn_dev_del_ifa(dn_db, ifap, 0); |
|
} |
|
|
|
ifa->ifa_local = ifa->ifa_address = dn_saddr2dn(sdn); |
|
|
|
ret = dn_dev_set_ifa(dev, ifa); |
|
} |
|
done: |
|
rtnl_unlock(); |
|
|
|
return ret; |
|
} |
|
|
|
struct net_device *dn_dev_get_default(void) |
|
{ |
|
struct net_device *dev; |
|
|
|
spin_lock(&dndev_lock); |
|
dev = decnet_default_device; |
|
if (dev) { |
|
if (dev->dn_ptr) |
|
dev_hold(dev); |
|
else |
|
dev = NULL; |
|
} |
|
spin_unlock(&dndev_lock); |
|
|
|
return dev; |
|
} |
|
|
|
int dn_dev_set_default(struct net_device *dev, int force) |
|
{ |
|
struct net_device *old = NULL; |
|
int rv = -EBUSY; |
|
if (!dev->dn_ptr) |
|
return -ENODEV; |
|
|
|
spin_lock(&dndev_lock); |
|
if (force || decnet_default_device == NULL) { |
|
old = decnet_default_device; |
|
decnet_default_device = dev; |
|
rv = 0; |
|
} |
|
spin_unlock(&dndev_lock); |
|
|
|
if (old) |
|
dev_put(old); |
|
return rv; |
|
} |
|
|
|
static void dn_dev_check_default(struct net_device *dev) |
|
{ |
|
spin_lock(&dndev_lock); |
|
if (dev == decnet_default_device) { |
|
decnet_default_device = NULL; |
|
} else { |
|
dev = NULL; |
|
} |
|
spin_unlock(&dndev_lock); |
|
|
|
if (dev) |
|
dev_put(dev); |
|
} |
|
|
|
/* |
|
* Called with RTNL |
|
*/ |
|
static struct dn_dev *dn_dev_by_index(int ifindex) |
|
{ |
|
struct net_device *dev; |
|
struct dn_dev *dn_dev = NULL; |
|
|
|
dev = __dev_get_by_index(&init_net, ifindex); |
|
if (dev) |
|
dn_dev = rtnl_dereference(dev->dn_ptr); |
|
|
|
return dn_dev; |
|
} |
|
|
|
static const struct nla_policy dn_ifa_policy[IFA_MAX+1] = { |
|
[IFA_ADDRESS] = { .type = NLA_U16 }, |
|
[IFA_LOCAL] = { .type = NLA_U16 }, |
|
[IFA_LABEL] = { .type = NLA_STRING, |
|
.len = IFNAMSIZ - 1 }, |
|
[IFA_FLAGS] = { .type = NLA_U32 }, |
|
}; |
|
|
|
static int dn_nl_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, |
|
struct netlink_ext_ack *extack) |
|
{ |
|
struct net *net = sock_net(skb->sk); |
|
struct nlattr *tb[IFA_MAX+1]; |
|
struct dn_dev *dn_db; |
|
struct ifaddrmsg *ifm; |
|
struct dn_ifaddr *ifa; |
|
struct dn_ifaddr __rcu **ifap; |
|
int err = -EINVAL; |
|
|
|
if (!netlink_capable(skb, CAP_NET_ADMIN)) |
|
return -EPERM; |
|
|
|
if (!net_eq(net, &init_net)) |
|
goto errout; |
|
|
|
err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFA_MAX, |
|
dn_ifa_policy, extack); |
|
if (err < 0) |
|
goto errout; |
|
|
|
err = -ENODEV; |
|
ifm = nlmsg_data(nlh); |
|
if ((dn_db = dn_dev_by_index(ifm->ifa_index)) == NULL) |
|
goto errout; |
|
|
|
err = -EADDRNOTAVAIL; |
|
for (ifap = &dn_db->ifa_list; |
|
(ifa = rtnl_dereference(*ifap)) != NULL; |
|
ifap = &ifa->ifa_next) { |
|
if (tb[IFA_LOCAL] && |
|
nla_memcmp(tb[IFA_LOCAL], &ifa->ifa_local, 2)) |
|
continue; |
|
|
|
if (tb[IFA_LABEL] && nla_strcmp(tb[IFA_LABEL], ifa->ifa_label)) |
|
continue; |
|
|
|
dn_dev_del_ifa(dn_db, ifap, 1); |
|
return 0; |
|
} |
|
|
|
errout: |
|
return err; |
|
} |
|
|
|
static int dn_nl_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, |
|
struct netlink_ext_ack *extack) |
|
{ |
|
struct net *net = sock_net(skb->sk); |
|
struct nlattr *tb[IFA_MAX+1]; |
|
struct net_device *dev; |
|
struct dn_dev *dn_db; |
|
struct ifaddrmsg *ifm; |
|
struct dn_ifaddr *ifa; |
|
int err; |
|
|
|
if (!netlink_capable(skb, CAP_NET_ADMIN)) |
|
return -EPERM; |
|
|
|
if (!net_eq(net, &init_net)) |
|
return -EINVAL; |
|
|
|
err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFA_MAX, |
|
dn_ifa_policy, extack); |
|
if (err < 0) |
|
return err; |
|
|
|
if (tb[IFA_LOCAL] == NULL) |
|
return -EINVAL; |
|
|
|
ifm = nlmsg_data(nlh); |
|
if ((dev = __dev_get_by_index(&init_net, ifm->ifa_index)) == NULL) |
|
return -ENODEV; |
|
|
|
if ((dn_db = rtnl_dereference(dev->dn_ptr)) == NULL) { |
|
dn_db = dn_dev_create(dev, &err); |
|
if (!dn_db) |
|
return err; |
|
} |
|
|
|
if ((ifa = dn_dev_alloc_ifa()) == NULL) |
|
return -ENOBUFS; |
|
|
|
if (tb[IFA_ADDRESS] == NULL) |
|
tb[IFA_ADDRESS] = tb[IFA_LOCAL]; |
|
|
|
ifa->ifa_local = nla_get_le16(tb[IFA_LOCAL]); |
|
ifa->ifa_address = nla_get_le16(tb[IFA_ADDRESS]); |
|
ifa->ifa_flags = tb[IFA_FLAGS] ? nla_get_u32(tb[IFA_FLAGS]) : |
|
ifm->ifa_flags; |
|
ifa->ifa_scope = ifm->ifa_scope; |
|
ifa->ifa_dev = dn_db; |
|
|
|
if (tb[IFA_LABEL]) |
|
nla_strscpy(ifa->ifa_label, tb[IFA_LABEL], IFNAMSIZ); |
|
else |
|
memcpy(ifa->ifa_label, dev->name, IFNAMSIZ); |
|
|
|
err = dn_dev_insert_ifa(dn_db, ifa); |
|
if (err) |
|
dn_dev_free_ifa(ifa); |
|
|
|
return err; |
|
} |
|
|
|
static inline size_t dn_ifaddr_nlmsg_size(void) |
|
{ |
|
return NLMSG_ALIGN(sizeof(struct ifaddrmsg)) |
|
+ nla_total_size(IFNAMSIZ) /* IFA_LABEL */ |
|
+ nla_total_size(2) /* IFA_ADDRESS */ |
|
+ nla_total_size(2) /* IFA_LOCAL */ |
|
+ nla_total_size(4); /* IFA_FLAGS */ |
|
} |
|
|
|
static int dn_nl_fill_ifaddr(struct sk_buff *skb, struct dn_ifaddr *ifa, |
|
u32 portid, u32 seq, int event, unsigned int flags) |
|
{ |
|
struct ifaddrmsg *ifm; |
|
struct nlmsghdr *nlh; |
|
u32 ifa_flags = ifa->ifa_flags | IFA_F_PERMANENT; |
|
|
|
nlh = nlmsg_put(skb, portid, seq, event, sizeof(*ifm), flags); |
|
if (nlh == NULL) |
|
return -EMSGSIZE; |
|
|
|
ifm = nlmsg_data(nlh); |
|
ifm->ifa_family = AF_DECnet; |
|
ifm->ifa_prefixlen = 16; |
|
ifm->ifa_flags = ifa_flags; |
|
ifm->ifa_scope = ifa->ifa_scope; |
|
ifm->ifa_index = ifa->ifa_dev->dev->ifindex; |
|
|
|
if ((ifa->ifa_address && |
|
nla_put_le16(skb, IFA_ADDRESS, ifa->ifa_address)) || |
|
(ifa->ifa_local && |
|
nla_put_le16(skb, IFA_LOCAL, ifa->ifa_local)) || |
|
(ifa->ifa_label[0] && |
|
nla_put_string(skb, IFA_LABEL, ifa->ifa_label)) || |
|
nla_put_u32(skb, IFA_FLAGS, ifa_flags)) |
|
goto nla_put_failure; |
|
nlmsg_end(skb, nlh); |
|
return 0; |
|
|
|
nla_put_failure: |
|
nlmsg_cancel(skb, nlh); |
|
return -EMSGSIZE; |
|
} |
|
|
|
static void dn_ifaddr_notify(int event, struct dn_ifaddr *ifa) |
|
{ |
|
struct sk_buff *skb; |
|
int err = -ENOBUFS; |
|
|
|
skb = alloc_skb(dn_ifaddr_nlmsg_size(), GFP_KERNEL); |
|
if (skb == NULL) |
|
goto errout; |
|
|
|
err = dn_nl_fill_ifaddr(skb, ifa, 0, 0, event, 0); |
|
if (err < 0) { |
|
/* -EMSGSIZE implies BUG in dn_ifaddr_nlmsg_size() */ |
|
WARN_ON(err == -EMSGSIZE); |
|
kfree_skb(skb); |
|
goto errout; |
|
} |
|
rtnl_notify(skb, &init_net, 0, RTNLGRP_DECnet_IFADDR, NULL, GFP_KERNEL); |
|
return; |
|
errout: |
|
if (err < 0) |
|
rtnl_set_sk_err(&init_net, RTNLGRP_DECnet_IFADDR, err); |
|
} |
|
|
|
static int dn_nl_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) |
|
{ |
|
struct net *net = sock_net(skb->sk); |
|
int idx, dn_idx = 0, skip_ndevs, skip_naddr; |
|
struct net_device *dev; |
|
struct dn_dev *dn_db; |
|
struct dn_ifaddr *ifa; |
|
|
|
if (!net_eq(net, &init_net)) |
|
return 0; |
|
|
|
skip_ndevs = cb->args[0]; |
|
skip_naddr = cb->args[1]; |
|
|
|
idx = 0; |
|
rcu_read_lock(); |
|
for_each_netdev_rcu(&init_net, dev) { |
|
if (idx < skip_ndevs) |
|
goto cont; |
|
else if (idx > skip_ndevs) { |
|
/* Only skip over addresses for first dev dumped |
|
* in this iteration (idx == skip_ndevs) */ |
|
skip_naddr = 0; |
|
} |
|
|
|
if ((dn_db = rcu_dereference(dev->dn_ptr)) == NULL) |
|
goto cont; |
|
|
|
for (ifa = rcu_dereference(dn_db->ifa_list), dn_idx = 0; ifa; |
|
ifa = rcu_dereference(ifa->ifa_next), dn_idx++) { |
|
if (dn_idx < skip_naddr) |
|
continue; |
|
|
|
if (dn_nl_fill_ifaddr(skb, ifa, NETLINK_CB(cb->skb).portid, |
|
cb->nlh->nlmsg_seq, RTM_NEWADDR, |
|
NLM_F_MULTI) < 0) |
|
goto done; |
|
} |
|
cont: |
|
idx++; |
|
} |
|
done: |
|
rcu_read_unlock(); |
|
cb->args[0] = idx; |
|
cb->args[1] = dn_idx; |
|
|
|
return skb->len; |
|
} |
|
|
|
static int dn_dev_get_first(struct net_device *dev, __le16 *addr) |
|
{ |
|
struct dn_dev *dn_db; |
|
struct dn_ifaddr *ifa; |
|
int rv = -ENODEV; |
|
|
|
rcu_read_lock(); |
|
dn_db = rcu_dereference(dev->dn_ptr); |
|
if (dn_db == NULL) |
|
goto out; |
|
|
|
ifa = rcu_dereference(dn_db->ifa_list); |
|
if (ifa != NULL) { |
|
*addr = ifa->ifa_local; |
|
rv = 0; |
|
} |
|
out: |
|
rcu_read_unlock(); |
|
return rv; |
|
} |
|
|
|
/* |
|
* Find a default address to bind to. |
|
* |
|
* This is one of those areas where the initial VMS concepts don't really |
|
* map onto the Linux concepts, and since we introduced multiple addresses |
|
* per interface we have to cope with slightly odd ways of finding out what |
|
* "our address" really is. Mostly it's not a problem; for this we just guess |
|
* a sensible default. Eventually the routing code will take care of all the |
|
* nasties for us I hope. |
|
*/ |
|
int dn_dev_bind_default(__le16 *addr) |
|
{ |
|
struct net_device *dev; |
|
int rv; |
|
dev = dn_dev_get_default(); |
|
last_chance: |
|
if (dev) { |
|
rv = dn_dev_get_first(dev, addr); |
|
dev_put(dev); |
|
if (rv == 0 || dev == init_net.loopback_dev) |
|
return rv; |
|
} |
|
dev = init_net.loopback_dev; |
|
dev_hold(dev); |
|
goto last_chance; |
|
} |
|
|
|
static void dn_send_endnode_hello(struct net_device *dev, struct dn_ifaddr *ifa) |
|
{ |
|
struct endnode_hello_message *msg; |
|
struct sk_buff *skb = NULL; |
|
__le16 *pktlen; |
|
struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr); |
|
|
|
if ((skb = dn_alloc_skb(NULL, sizeof(*msg), GFP_ATOMIC)) == NULL) |
|
return; |
|
|
|
skb->dev = dev; |
|
|
|
msg = skb_put(skb, sizeof(*msg)); |
|
|
|
msg->msgflg = 0x0D; |
|
memcpy(msg->tiver, dn_eco_version, 3); |
|
dn_dn2eth(msg->id, ifa->ifa_local); |
|
msg->iinfo = DN_RT_INFO_ENDN; |
|
msg->blksize = cpu_to_le16(mtu2blksize(dev)); |
|
msg->area = 0x00; |
|
memset(msg->seed, 0, 8); |
|
memcpy(msg->neighbor, dn_hiord, ETH_ALEN); |
|
|
|
if (dn_db->router) { |
|
struct dn_neigh *dn = (struct dn_neigh *)dn_db->router; |
|
dn_dn2eth(msg->neighbor, dn->addr); |
|
} |
|
|
|
msg->timer = cpu_to_le16((unsigned short)dn_db->parms.t3); |
|
msg->mpd = 0x00; |
|
msg->datalen = 0x02; |
|
memset(msg->data, 0xAA, 2); |
|
|
|
pktlen = skb_push(skb, 2); |
|
*pktlen = cpu_to_le16(skb->len - 2); |
|
|
|
skb_reset_network_header(skb); |
|
|
|
dn_rt_finish_output(skb, dn_rt_all_rt_mcast, msg->id); |
|
} |
|
|
|
|
|
#define DRDELAY (5 * HZ) |
|
|
|
static int dn_am_i_a_router(struct dn_neigh *dn, struct dn_dev *dn_db, struct dn_ifaddr *ifa) |
|
{ |
|
/* First check time since device went up */ |
|
if (time_before(jiffies, dn_db->uptime + DRDELAY)) |
|
return 0; |
|
|
|
/* If there is no router, then yes... */ |
|
if (!dn_db->router) |
|
return 1; |
|
|
|
/* otherwise only if we have a higher priority or.. */ |
|
if (dn->priority < dn_db->parms.priority) |
|
return 1; |
|
|
|
/* if we have equal priority and a higher node number */ |
|
if (dn->priority != dn_db->parms.priority) |
|
return 0; |
|
|
|
if (le16_to_cpu(dn->addr) < le16_to_cpu(ifa->ifa_local)) |
|
return 1; |
|
|
|
return 0; |
|
} |
|
|
|
static void dn_send_router_hello(struct net_device *dev, struct dn_ifaddr *ifa) |
|
{ |
|
int n; |
|
struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr); |
|
struct dn_neigh *dn = (struct dn_neigh *)dn_db->router; |
|
struct sk_buff *skb; |
|
size_t size; |
|
unsigned char *ptr; |
|
unsigned char *i1, *i2; |
|
__le16 *pktlen; |
|
char *src; |
|
|
|
if (mtu2blksize(dev) < (26 + 7)) |
|
return; |
|
|
|
n = mtu2blksize(dev) - 26; |
|
n /= 7; |
|
|
|
if (n > 32) |
|
n = 32; |
|
|
|
size = 2 + 26 + 7 * n; |
|
|
|
if ((skb = dn_alloc_skb(NULL, size, GFP_ATOMIC)) == NULL) |
|
return; |
|
|
|
skb->dev = dev; |
|
ptr = skb_put(skb, size); |
|
|
|
*ptr++ = DN_RT_PKT_CNTL | DN_RT_PKT_ERTH; |
|
*ptr++ = 2; /* ECO */ |
|
*ptr++ = 0; |
|
*ptr++ = 0; |
|
dn_dn2eth(ptr, ifa->ifa_local); |
|
src = ptr; |
|
ptr += ETH_ALEN; |
|
*ptr++ = dn_db->parms.forwarding == 1 ? |
|
DN_RT_INFO_L1RT : DN_RT_INFO_L2RT; |
|
*((__le16 *)ptr) = cpu_to_le16(mtu2blksize(dev)); |
|
ptr += 2; |
|
*ptr++ = dn_db->parms.priority; /* Priority */ |
|
*ptr++ = 0; /* Area: Reserved */ |
|
*((__le16 *)ptr) = cpu_to_le16((unsigned short)dn_db->parms.t3); |
|
ptr += 2; |
|
*ptr++ = 0; /* MPD: Reserved */ |
|
i1 = ptr++; |
|
memset(ptr, 0, 7); /* Name: Reserved */ |
|
ptr += 7; |
|
i2 = ptr++; |
|
|
|
n = dn_neigh_elist(dev, ptr, n); |
|
|
|
*i2 = 7 * n; |
|
*i1 = 8 + *i2; |
|
|
|
skb_trim(skb, (27 + *i2)); |
|
|
|
pktlen = skb_push(skb, 2); |
|
*pktlen = cpu_to_le16(skb->len - 2); |
|
|
|
skb_reset_network_header(skb); |
|
|
|
if (dn_am_i_a_router(dn, dn_db, ifa)) { |
|
struct sk_buff *skb2 = skb_copy(skb, GFP_ATOMIC); |
|
if (skb2) { |
|
dn_rt_finish_output(skb2, dn_rt_all_end_mcast, src); |
|
} |
|
} |
|
|
|
dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src); |
|
} |
|
|
|
static void dn_send_brd_hello(struct net_device *dev, struct dn_ifaddr *ifa) |
|
{ |
|
struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr); |
|
|
|
if (dn_db->parms.forwarding == 0) |
|
dn_send_endnode_hello(dev, ifa); |
|
else |
|
dn_send_router_hello(dev, ifa); |
|
} |
|
|
|
static void dn_send_ptp_hello(struct net_device *dev, struct dn_ifaddr *ifa) |
|
{ |
|
int tdlen = 16; |
|
int size = dev->hard_header_len + 2 + 4 + tdlen; |
|
struct sk_buff *skb = dn_alloc_skb(NULL, size, GFP_ATOMIC); |
|
int i; |
|
unsigned char *ptr; |
|
char src[ETH_ALEN]; |
|
|
|
if (skb == NULL) |
|
return ; |
|
|
|
skb->dev = dev; |
|
skb_push(skb, dev->hard_header_len); |
|
ptr = skb_put(skb, 2 + 4 + tdlen); |
|
|
|
*ptr++ = DN_RT_PKT_HELO; |
|
*((__le16 *)ptr) = ifa->ifa_local; |
|
ptr += 2; |
|
*ptr++ = tdlen; |
|
|
|
for(i = 0; i < tdlen; i++) |
|
*ptr++ = 0252; |
|
|
|
dn_dn2eth(src, ifa->ifa_local); |
|
dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src); |
|
} |
|
|
|
static int dn_eth_up(struct net_device *dev) |
|
{ |
|
struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr); |
|
|
|
if (dn_db->parms.forwarding == 0) |
|
dev_mc_add(dev, dn_rt_all_end_mcast); |
|
else |
|
dev_mc_add(dev, dn_rt_all_rt_mcast); |
|
|
|
dn_db->use_long = 1; |
|
|
|
return 0; |
|
} |
|
|
|
static void dn_eth_down(struct net_device *dev) |
|
{ |
|
struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr); |
|
|
|
if (dn_db->parms.forwarding == 0) |
|
dev_mc_del(dev, dn_rt_all_end_mcast); |
|
else |
|
dev_mc_del(dev, dn_rt_all_rt_mcast); |
|
} |
|
|
|
static void dn_dev_set_timer(struct net_device *dev); |
|
|
|
static void dn_dev_timer_func(struct timer_list *t) |
|
{ |
|
struct dn_dev *dn_db = from_timer(dn_db, t, timer); |
|
struct net_device *dev; |
|
struct dn_ifaddr *ifa; |
|
|
|
rcu_read_lock(); |
|
dev = dn_db->dev; |
|
if (dn_db->t3 <= dn_db->parms.t2) { |
|
if (dn_db->parms.timer3) { |
|
for (ifa = rcu_dereference(dn_db->ifa_list); |
|
ifa; |
|
ifa = rcu_dereference(ifa->ifa_next)) { |
|
if (!(ifa->ifa_flags & IFA_F_SECONDARY)) |
|
dn_db->parms.timer3(dev, ifa); |
|
} |
|
} |
|
dn_db->t3 = dn_db->parms.t3; |
|
} else { |
|
dn_db->t3 -= dn_db->parms.t2; |
|
} |
|
rcu_read_unlock(); |
|
dn_dev_set_timer(dev); |
|
} |
|
|
|
static void dn_dev_set_timer(struct net_device *dev) |
|
{ |
|
struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr); |
|
|
|
if (dn_db->parms.t2 > dn_db->parms.t3) |
|
dn_db->parms.t2 = dn_db->parms.t3; |
|
|
|
dn_db->timer.expires = jiffies + (dn_db->parms.t2 * HZ); |
|
|
|
add_timer(&dn_db->timer); |
|
} |
|
|
|
static struct dn_dev *dn_dev_create(struct net_device *dev, int *err) |
|
{ |
|
int i; |
|
struct dn_dev_parms *p = dn_dev_list; |
|
struct dn_dev *dn_db; |
|
|
|
for(i = 0; i < DN_DEV_LIST_SIZE; i++, p++) { |
|
if (p->type == dev->type) |
|
break; |
|
} |
|
|
|
*err = -ENODEV; |
|
if (i == DN_DEV_LIST_SIZE) |
|
return NULL; |
|
|
|
*err = -ENOBUFS; |
|
if ((dn_db = kzalloc(sizeof(struct dn_dev), GFP_ATOMIC)) == NULL) |
|
return NULL; |
|
|
|
memcpy(&dn_db->parms, p, sizeof(struct dn_dev_parms)); |
|
|
|
rcu_assign_pointer(dev->dn_ptr, dn_db); |
|
dn_db->dev = dev; |
|
timer_setup(&dn_db->timer, dn_dev_timer_func, 0); |
|
|
|
dn_db->uptime = jiffies; |
|
|
|
dn_db->neigh_parms = neigh_parms_alloc(dev, &dn_neigh_table); |
|
if (!dn_db->neigh_parms) { |
|
RCU_INIT_POINTER(dev->dn_ptr, NULL); |
|
kfree(dn_db); |
|
return NULL; |
|
} |
|
|
|
if (dn_db->parms.up) { |
|
if (dn_db->parms.up(dev) < 0) { |
|
neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms); |
|
dev->dn_ptr = NULL; |
|
kfree(dn_db); |
|
return NULL; |
|
} |
|
} |
|
|
|
dn_dev_sysctl_register(dev, &dn_db->parms); |
|
|
|
dn_dev_set_timer(dev); |
|
|
|
*err = 0; |
|
return dn_db; |
|
} |
|
|
|
|
|
/* |
|
* This processes a device up event. We only start up |
|
* the loopback device & ethernet devices with correct |
|
* MAC addresses automatically. Others must be started |
|
* specifically. |
|
* |
|
* FIXME: How should we configure the loopback address ? If we could dispense |
|
* with using decnet_address here and for autobind, it will be one less thing |
|
* for users to worry about setting up. |
|
*/ |
|
|
|
void dn_dev_up(struct net_device *dev) |
|
{ |
|
struct dn_ifaddr *ifa; |
|
__le16 addr = decnet_address; |
|
int maybe_default = 0; |
|
struct dn_dev *dn_db = rtnl_dereference(dev->dn_ptr); |
|
|
|
if ((dev->type != ARPHRD_ETHER) && (dev->type != ARPHRD_LOOPBACK)) |
|
return; |
|
|
|
/* |
|
* Need to ensure that loopback device has a dn_db attached to it |
|
* to allow creation of neighbours against it, even though it might |
|
* not have a local address of its own. Might as well do the same for |
|
* all autoconfigured interfaces. |
|
*/ |
|
if (dn_db == NULL) { |
|
int err; |
|
dn_db = dn_dev_create(dev, &err); |
|
if (dn_db == NULL) |
|
return; |
|
} |
|
|
|
if (dev->type == ARPHRD_ETHER) { |
|
if (memcmp(dev->dev_addr, dn_hiord, 4) != 0) |
|
return; |
|
addr = dn_eth2dn(dev->dev_addr); |
|
maybe_default = 1; |
|
} |
|
|
|
if (addr == 0) |
|
return; |
|
|
|
if ((ifa = dn_dev_alloc_ifa()) == NULL) |
|
return; |
|
|
|
ifa->ifa_local = ifa->ifa_address = addr; |
|
ifa->ifa_flags = 0; |
|
ifa->ifa_scope = RT_SCOPE_UNIVERSE; |
|
strcpy(ifa->ifa_label, dev->name); |
|
|
|
dn_dev_set_ifa(dev, ifa); |
|
|
|
/* |
|
* Automagically set the default device to the first automatically |
|
* configured ethernet card in the system. |
|
*/ |
|
if (maybe_default) { |
|
dev_hold(dev); |
|
if (dn_dev_set_default(dev, 0)) |
|
dev_put(dev); |
|
} |
|
} |
|
|
|
static void dn_dev_delete(struct net_device *dev) |
|
{ |
|
struct dn_dev *dn_db = rtnl_dereference(dev->dn_ptr); |
|
|
|
if (dn_db == NULL) |
|
return; |
|
|
|
del_timer_sync(&dn_db->timer); |
|
dn_dev_sysctl_unregister(&dn_db->parms); |
|
dn_dev_check_default(dev); |
|
neigh_ifdown(&dn_neigh_table, dev); |
|
|
|
if (dn_db->parms.down) |
|
dn_db->parms.down(dev); |
|
|
|
dev->dn_ptr = NULL; |
|
|
|
neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms); |
|
neigh_ifdown(&dn_neigh_table, dev); |
|
|
|
if (dn_db->router) |
|
neigh_release(dn_db->router); |
|
if (dn_db->peer) |
|
neigh_release(dn_db->peer); |
|
|
|
kfree(dn_db); |
|
} |
|
|
|
void dn_dev_down(struct net_device *dev) |
|
{ |
|
struct dn_dev *dn_db = rtnl_dereference(dev->dn_ptr); |
|
struct dn_ifaddr *ifa; |
|
|
|
if (dn_db == NULL) |
|
return; |
|
|
|
while ((ifa = rtnl_dereference(dn_db->ifa_list)) != NULL) { |
|
dn_dev_del_ifa(dn_db, &dn_db->ifa_list, 0); |
|
dn_dev_free_ifa(ifa); |
|
} |
|
|
|
dn_dev_delete(dev); |
|
} |
|
|
|
void dn_dev_init_pkt(struct sk_buff *skb) |
|
{ |
|
} |
|
|
|
void dn_dev_veri_pkt(struct sk_buff *skb) |
|
{ |
|
} |
|
|
|
void dn_dev_hello(struct sk_buff *skb) |
|
{ |
|
} |
|
|
|
void dn_dev_devices_off(void) |
|
{ |
|
struct net_device *dev; |
|
|
|
rtnl_lock(); |
|
for_each_netdev(&init_net, dev) |
|
dn_dev_down(dev); |
|
rtnl_unlock(); |
|
|
|
} |
|
|
|
void dn_dev_devices_on(void) |
|
{ |
|
struct net_device *dev; |
|
|
|
rtnl_lock(); |
|
for_each_netdev(&init_net, dev) { |
|
if (dev->flags & IFF_UP) |
|
dn_dev_up(dev); |
|
} |
|
rtnl_unlock(); |
|
} |
|
|
|
int register_dnaddr_notifier(struct notifier_block *nb) |
|
{ |
|
return blocking_notifier_chain_register(&dnaddr_chain, nb); |
|
} |
|
|
|
int unregister_dnaddr_notifier(struct notifier_block *nb) |
|
{ |
|
return blocking_notifier_chain_unregister(&dnaddr_chain, nb); |
|
} |
|
|
|
#ifdef CONFIG_PROC_FS |
|
static inline int is_dn_dev(struct net_device *dev) |
|
{ |
|
return dev->dn_ptr != NULL; |
|
} |
|
|
|
static void *dn_dev_seq_start(struct seq_file *seq, loff_t *pos) |
|
__acquires(RCU) |
|
{ |
|
int i; |
|
struct net_device *dev; |
|
|
|
rcu_read_lock(); |
|
|
|
if (*pos == 0) |
|
return SEQ_START_TOKEN; |
|
|
|
i = 1; |
|
for_each_netdev_rcu(&init_net, dev) { |
|
if (!is_dn_dev(dev)) |
|
continue; |
|
|
|
if (i++ == *pos) |
|
return dev; |
|
} |
|
|
|
return NULL; |
|
} |
|
|
|
static void *dn_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
|
{ |
|
struct net_device *dev; |
|
|
|
++*pos; |
|
|
|
dev = v; |
|
if (v == SEQ_START_TOKEN) |
|
dev = net_device_entry(&init_net.dev_base_head); |
|
|
|
for_each_netdev_continue_rcu(&init_net, dev) { |
|
if (!is_dn_dev(dev)) |
|
continue; |
|
|
|
return dev; |
|
} |
|
|
|
return NULL; |
|
} |
|
|
|
static void dn_dev_seq_stop(struct seq_file *seq, void *v) |
|
__releases(RCU) |
|
{ |
|
rcu_read_unlock(); |
|
} |
|
|
|
static char *dn_type2asc(char type) |
|
{ |
|
switch (type) { |
|
case DN_DEV_BCAST: |
|
return "B"; |
|
case DN_DEV_UCAST: |
|
return "U"; |
|
case DN_DEV_MPOINT: |
|
return "M"; |
|
} |
|
|
|
return "?"; |
|
} |
|
|
|
static int dn_dev_seq_show(struct seq_file *seq, void *v) |
|
{ |
|
if (v == SEQ_START_TOKEN) |
|
seq_puts(seq, "Name Flags T1 Timer1 T3 Timer3 BlkSize Pri State DevType Router Peer\n"); |
|
else { |
|
struct net_device *dev = v; |
|
char peer_buf[DN_ASCBUF_LEN]; |
|
char router_buf[DN_ASCBUF_LEN]; |
|
struct dn_dev *dn_db = rcu_dereference(dev->dn_ptr); |
|
|
|
seq_printf(seq, "%-8s %1s %04u %04u %04lu %04lu" |
|
" %04hu %03d %02x %-10s %-7s %-7s\n", |
|
dev->name, |
|
dn_type2asc(dn_db->parms.mode), |
|
0, 0, |
|
dn_db->t3, dn_db->parms.t3, |
|
mtu2blksize(dev), |
|
dn_db->parms.priority, |
|
dn_db->parms.state, dn_db->parms.name, |
|
dn_db->router ? dn_addr2asc(le16_to_cpu(*(__le16 *)dn_db->router->primary_key), router_buf) : "", |
|
dn_db->peer ? dn_addr2asc(le16_to_cpu(*(__le16 *)dn_db->peer->primary_key), peer_buf) : ""); |
|
} |
|
return 0; |
|
} |
|
|
|
static const struct seq_operations dn_dev_seq_ops = { |
|
.start = dn_dev_seq_start, |
|
.next = dn_dev_seq_next, |
|
.stop = dn_dev_seq_stop, |
|
.show = dn_dev_seq_show, |
|
}; |
|
#endif /* CONFIG_PROC_FS */ |
|
|
|
static int addr[2]; |
|
module_param_array(addr, int, NULL, 0444); |
|
MODULE_PARM_DESC(addr, "The DECnet address of this machine: area,node"); |
|
|
|
void __init dn_dev_init(void) |
|
{ |
|
if (addr[0] > 63 || addr[0] < 0) { |
|
printk(KERN_ERR "DECnet: Area must be between 0 and 63"); |
|
return; |
|
} |
|
|
|
if (addr[1] > 1023 || addr[1] < 0) { |
|
printk(KERN_ERR "DECnet: Node must be between 0 and 1023"); |
|
return; |
|
} |
|
|
|
decnet_address = cpu_to_le16((addr[0] << 10) | addr[1]); |
|
|
|
dn_dev_devices_on(); |
|
|
|
rtnl_register_module(THIS_MODULE, PF_DECnet, RTM_NEWADDR, |
|
dn_nl_newaddr, NULL, 0); |
|
rtnl_register_module(THIS_MODULE, PF_DECnet, RTM_DELADDR, |
|
dn_nl_deladdr, NULL, 0); |
|
rtnl_register_module(THIS_MODULE, PF_DECnet, RTM_GETADDR, |
|
NULL, dn_nl_dump_ifaddr, 0); |
|
|
|
proc_create_seq("decnet_dev", 0444, init_net.proc_net, &dn_dev_seq_ops); |
|
|
|
#ifdef CONFIG_SYSCTL |
|
{ |
|
int i; |
|
for(i = 0; i < DN_DEV_LIST_SIZE; i++) |
|
dn_dev_sysctl_register(NULL, &dn_dev_list[i]); |
|
} |
|
#endif /* CONFIG_SYSCTL */ |
|
} |
|
|
|
void __exit dn_dev_cleanup(void) |
|
{ |
|
#ifdef CONFIG_SYSCTL |
|
{ |
|
int i; |
|
for(i = 0; i < DN_DEV_LIST_SIZE; i++) |
|
dn_dev_sysctl_unregister(&dn_dev_list[i]); |
|
} |
|
#endif /* CONFIG_SYSCTL */ |
|
|
|
remove_proc_entry("decnet_dev", init_net.proc_net); |
|
|
|
dn_dev_devices_off(); |
|
}
|
|
|