![Linus Torvalds](/assets/img/avatar_default.png)
* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (43 commits) Documentation/trace/events.txt: Remove obsolete sched_signal_send. writeback: fix global_dirty_limits comment runtime -> real-time ppc: fix comment typo singal -> signal drivers: fix comment typo diable -> disable. m68k: fix comment typo diable -> disable. wireless: comment typo fix diable -> disable. media: comment typo fix diable -> disable. remove doc for obsolete dynamic-printk kernel-parameter remove extraneous 'is' from Documentation/iostats.txt Fix spelling milisec -> ms in snd_ps3 module parameter description Fix spelling mistakes in comments Revert conflicting V4L changes i7core_edac: fix typos in comments mm/rmap.c: fix comment sound, ca0106: Fix assignment to 'channel'. hrtimer: fix a typo in comment init/Kconfig: fix typo anon_inodes: fix wrong function name in comment fix comment typos concerning "consistent" poll: fix a typo in comment ... Fix up trivial conflicts in: - drivers/net/wireless/iwlwifi/iwl-core.c (moved to iwl-legacy.c) - fs/ext4/ext4.h Also fix missed 'diabled' typo in drivers/net/bnx2x/bnx2x.h while at it.
1449 lines
32 KiB
C
1449 lines
32 KiB
C
/*
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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 <SteveW@ACM.org>
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* Eduardo Marcelo Serrat <emserrat@geocities.com>
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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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#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 <asm/uaccess.h>
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#include <asm/system.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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#define DN_IFREQ_SIZE (sizeof(struct ifreq) - sizeof(struct sockaddr) + sizeof(struct sockaddr_dn))
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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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extern struct neigh_table dn_neigh_table;
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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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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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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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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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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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#define DN_DEV_PARMS_OFFSET(x) offsetof(struct dn_dev_parms, x)
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#ifdef CONFIG_SYSCTL
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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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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(ctl_table *, int,
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void __user *, size_t *, 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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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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{0}
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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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#define DN_CTL_PATH_DEV 3
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struct ctl_path dn_ctl_path[] = {
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{ .procname = "net", },
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{ .procname = "decnet", },
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{ .procname = "conf", },
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{ /* to be set */ },
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{ },
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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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if (dev) {
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dn_ctl_path[DN_CTL_PATH_DEV].procname = dev->name;
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} else {
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dn_ctl_path[DN_CTL_PATH_DEV].procname = parms->name;
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}
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t->dn_dev_vars[0].extra1 = (void *)dev;
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t->sysctl_header = register_sysctl_paths(dn_ctl_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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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_sysctl_table(t->sysctl_header);
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kfree(t);
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}
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}
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static int dn_forwarding_proc(ctl_table *table, int write,
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void __user *buffer,
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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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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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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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#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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#endif /* CONFIG_SYSCTL */
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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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return (__u16)blksize;
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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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ifa = kzalloc(sizeof(*ifa), GFP_KERNEL);
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return ifa;
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}
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static void dn_dev_free_ifa_rcu(struct rcu_head *head)
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{
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kfree(container_of(head, struct dn_ifaddr, rcu));
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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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call_rcu(&ifa->rcu, dn_dev_free_ifa_rcu);
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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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{
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struct net_device *dev = dn_db->dev;
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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 */
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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)
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return -EEXIST;
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}
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if (dev->type == ARPHRD_ETHER) {
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if (ifa->ifa_local != dn_eth2dn(dev->dev_addr)) {
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dn_dn2eth(mac_addr, ifa->ifa_local);
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dev_mc_add(dev, mac_addr);
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}
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}
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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);
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return 0;
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}
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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);
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int rv;
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|
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if (dn_db == NULL) {
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int err;
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dn_db = dn_dev_create(dev, &err);
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if (dn_db == NULL)
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return err;
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}
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ifa->ifa_dev = dn_db;
|
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if (dev->flags & IFF_LOOPBACK)
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ifa->ifa_scope = RT_SCOPE_HOST;
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|
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rv = dn_dev_insert_ifa(dn_db, ifa);
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if (rv)
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dn_dev_free_ifa(ifa);
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return rv;
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}
|
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|
|
|
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int dn_dev_ioctl(unsigned int cmd, void __user *arg)
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{
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char buffer[DN_IFREQ_SIZE];
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struct ifreq *ifr = (struct ifreq *)buffer;
|
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struct sockaddr_dn *sdn = (struct sockaddr_dn *)&ifr->ifr_addr;
|
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struct dn_dev *dn_db;
|
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struct net_device *dev;
|
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struct dn_ifaddr *ifa = NULL;
|
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struct dn_ifaddr __rcu **ifap = NULL;
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int ret = 0;
|
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if (copy_from_user(ifr, arg, DN_IFREQ_SIZE))
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return -EFAULT;
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ifr->ifr_name[IFNAMSIZ-1] = 0;
|
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|
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dev_load(&init_net, ifr->ifr_name);
|
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|
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switch(cmd) {
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case SIOCGIFADDR:
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break;
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case SIOCSIFADDR:
|
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if (!capable(CAP_NET_ADMIN))
|
|
return -EACCES;
|
|
if (sdn->sdn_family != AF_DECnet)
|
|
return -EINVAL;
|
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break;
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default:
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return -EINVAL;
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}
|
|
|
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rtnl_lock();
|
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|
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if ((dev = __dev_get_by_name(&init_net, ifr->ifr_name)) == NULL) {
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ret = -ENODEV;
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goto done;
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}
|
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|
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if ((dn_db = rtnl_dereference(dev->dn_ptr)) != NULL) {
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for (ifap = &dn_db->ifa_list;
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(ifa = rtnl_dereference(*ifap)) != NULL;
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ifap = &ifa->ifa_next)
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if (strcmp(ifr->ifr_name, ifa->ifa_label) == 0)
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break;
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}
|
|
|
|
if (ifa == NULL && cmd != SIOCSIFADDR) {
|
|
ret = -EADDRNOTAVAIL;
|
|
goto done;
|
|
}
|
|
|
|
switch(cmd) {
|
|
case SIOCGIFADDR:
|
|
*((__le16 *)sdn->sdn_nodeaddr) = ifa->ifa_local;
|
|
goto rarok;
|
|
|
|
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;
|
|
rarok:
|
|
if (copy_to_user(arg, ifr, DN_IFREQ_SIZE))
|
|
ret = -EFAULT;
|
|
goto done;
|
|
}
|
|
|
|
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 },
|
|
};
|
|
|
|
static int dn_nl_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
|
|
{
|
|
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 (!net_eq(net, &init_net))
|
|
goto errout;
|
|
|
|
err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, dn_ifa_policy);
|
|
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, void *arg)
|
|
{
|
|
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 (!net_eq(net, &init_net))
|
|
return -EINVAL;
|
|
|
|
err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, dn_ifa_policy);
|
|
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 = ifm->ifa_flags;
|
|
ifa->ifa_scope = ifm->ifa_scope;
|
|
ifa->ifa_dev = dn_db;
|
|
|
|
if (tb[IFA_LABEL])
|
|
nla_strlcpy(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 */
|
|
}
|
|
|
|
static int dn_nl_fill_ifaddr(struct sk_buff *skb, struct dn_ifaddr *ifa,
|
|
u32 pid, u32 seq, int event, unsigned int flags)
|
|
{
|
|
struct ifaddrmsg *ifm;
|
|
struct nlmsghdr *nlh;
|
|
|
|
nlh = nlmsg_put(skb, pid, 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->ifa_flags | IFA_F_PERMANENT;
|
|
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);
|
|
if (ifa->ifa_local)
|
|
NLA_PUT_LE16(skb, IFA_LOCAL, ifa->ifa_local);
|
|
if (ifa->ifa_label[0])
|
|
NLA_PUT_STRING(skb, IFA_LABEL, ifa->ifa_label);
|
|
|
|
return nlmsg_end(skb, nlh);
|
|
|
|
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;
|
|
for_each_netdev(&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 = rtnl_dereference(dev->dn_ptr)) == NULL)
|
|
goto cont;
|
|
|
|
for (ifa = rtnl_dereference(dn_db->ifa_list), dn_idx = 0; ifa;
|
|
ifa = rtnl_dereference(ifa->ifa_next), dn_idx++) {
|
|
if (dn_idx < skip_naddr)
|
|
continue;
|
|
|
|
if (dn_nl_fill_ifaddr(skb, ifa, NETLINK_CB(cb->skb).pid,
|
|
cb->nlh->nlmsg_seq, RTM_NEWADDR,
|
|
NLM_F_MULTI) < 0)
|
|
goto done;
|
|
}
|
|
cont:
|
|
idx++;
|
|
}
|
|
done:
|
|
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 = (struct endnode_hello_message *)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 = (__le16 *)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 ((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 = (__le16 *)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(unsigned long arg)
|
|
{
|
|
struct net_device *dev = (struct net_device *)arg;
|
|
struct dn_dev *dn_db;
|
|
struct dn_ifaddr *ifa;
|
|
|
|
rcu_read_lock();
|
|
dn_db = rcu_dereference(dev->dn_ptr);
|
|
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.data = (unsigned long)dev;
|
|
dn_db->timer.function = dn_dev_timer_func;
|
|
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;
|
|
init_timer(&dn_db->timer);
|
|
|
|
dn_db->uptime = jiffies;
|
|
|
|
dn_db->neigh_parms = neigh_parms_alloc(dev, &dn_neigh_table);
|
|
if (!dn_db->neigh_parms) {
|
|
rcu_assign_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 = (struct net_device *)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 ? 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,
|
|
};
|
|
|
|
static int dn_dev_seq_open(struct inode *inode, struct file *file)
|
|
{
|
|
return seq_open(file, &dn_dev_seq_ops);
|
|
}
|
|
|
|
static const struct file_operations dn_dev_seq_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = dn_dev_seq_open,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.release = seq_release,
|
|
};
|
|
|
|
#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(PF_DECnet, RTM_NEWADDR, dn_nl_newaddr, NULL);
|
|
rtnl_register(PF_DECnet, RTM_DELADDR, dn_nl_deladdr, NULL);
|
|
rtnl_register(PF_DECnet, RTM_GETADDR, NULL, dn_nl_dump_ifaddr);
|
|
|
|
proc_net_fops_create(&init_net, "decnet_dev", S_IRUGO, &dn_dev_seq_fops);
|
|
|
|
#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 */
|
|
|
|
proc_net_remove(&init_net, "decnet_dev");
|
|
|
|
dn_dev_devices_off();
|
|
}
|