Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * DECnet An implementation of the DECnet protocol suite for the LINUX |
| 3 | * operating system. DECnet is implemented using the BSD Socket |
| 4 | * interface as the means of communication with the user level. |
| 5 | * |
| 6 | * DECnet Device Layer |
| 7 | * |
| 8 | * Authors: Steve Whitehouse <SteveW@ACM.org> |
| 9 | * Eduardo Marcelo Serrat <emserrat@geocities.com> |
| 10 | * |
| 11 | * Changes: |
| 12 | * Steve Whitehouse : Devices now see incoming frames so they |
| 13 | * can mark on who it came from. |
| 14 | * Steve Whitehouse : Fixed bug in creating neighbours. Each neighbour |
| 15 | * can now have a device specific setup func. |
| 16 | * Steve Whitehouse : Added /proc/sys/net/decnet/conf/<dev>/ |
| 17 | * Steve Whitehouse : Fixed bug which sometimes killed timer |
| 18 | * Steve Whitehouse : Multiple ifaddr support |
| 19 | * Steve Whitehouse : SIOCGIFCONF is now a compile time option |
| 20 | * Steve Whitehouse : /proc/sys/net/decnet/conf/<sys>/forwarding |
| 21 | * Steve Whitehouse : Removed timer1 - it's a user space issue now |
| 22 | * Patrick Caulfield : Fixed router hello message format |
| 23 | * Steve Whitehouse : Got rid of constant sizes for blksize for |
| 24 | * devices. All mtu based now. |
| 25 | */ |
| 26 | |
Randy Dunlap | 4fc268d | 2006-01-11 12:17:47 -0800 | [diff] [blame] | 27 | #include <linux/capability.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | #include <linux/module.h> |
| 29 | #include <linux/moduleparam.h> |
| 30 | #include <linux/init.h> |
| 31 | #include <linux/net.h> |
| 32 | #include <linux/netdevice.h> |
| 33 | #include <linux/proc_fs.h> |
| 34 | #include <linux/seq_file.h> |
| 35 | #include <linux/timer.h> |
| 36 | #include <linux/string.h> |
Thomas Graf | 1823730 | 2006-08-04 23:04:54 -0700 | [diff] [blame] | 37 | #include <linux/if_addr.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | #include <linux/if_arp.h> |
| 39 | #include <linux/if_ether.h> |
| 40 | #include <linux/skbuff.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | #include <linux/sysctl.h> |
| 42 | #include <linux/notifier.h> |
| 43 | #include <asm/uaccess.h> |
| 44 | #include <asm/system.h> |
Eric W. Biederman | 457c4cb | 2007-09-12 12:01:34 +0200 | [diff] [blame] | 45 | #include <net/net_namespace.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | #include <net/neighbour.h> |
| 47 | #include <net/dst.h> |
| 48 | #include <net/flow.h> |
Steven Whitehouse | a8731cb | 2006-08-09 15:56:46 -0700 | [diff] [blame] | 49 | #include <net/fib_rules.h> |
Thomas Graf | a6f01ca | 2006-11-24 17:14:07 -0800 | [diff] [blame] | 50 | #include <net/netlink.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | #include <net/dn.h> |
| 52 | #include <net/dn_dev.h> |
| 53 | #include <net/dn_route.h> |
| 54 | #include <net/dn_neigh.h> |
| 55 | #include <net/dn_fib.h> |
| 56 | |
| 57 | #define DN_IFREQ_SIZE (sizeof(struct ifreq) - sizeof(struct sockaddr) + sizeof(struct sockaddr_dn)) |
| 58 | |
| 59 | static char dn_rt_all_end_mcast[ETH_ALEN] = {0xAB,0x00,0x00,0x04,0x00,0x00}; |
| 60 | static char dn_rt_all_rt_mcast[ETH_ALEN] = {0xAB,0x00,0x00,0x03,0x00,0x00}; |
| 61 | static char dn_hiord[ETH_ALEN] = {0xAA,0x00,0x04,0x00,0x00,0x00}; |
| 62 | static unsigned char dn_eco_version[3] = {0x02,0x00,0x00}; |
| 63 | |
| 64 | extern struct neigh_table dn_neigh_table; |
| 65 | |
| 66 | /* |
| 67 | * decnet_address is kept in network order. |
| 68 | */ |
Steven Whitehouse | c4ea94a | 2006-03-20 22:42:39 -0800 | [diff] [blame] | 69 | __le16 decnet_address = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | |
| 71 | static DEFINE_RWLOCK(dndev_lock); |
| 72 | static struct net_device *decnet_default_device; |
Alan Stern | e041c68 | 2006-03-27 01:16:30 -0800 | [diff] [blame] | 73 | static BLOCKING_NOTIFIER_HEAD(dnaddr_chain); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | |
| 75 | static struct dn_dev *dn_dev_create(struct net_device *dev, int *err); |
| 76 | static void dn_dev_delete(struct net_device *dev); |
Thomas Graf | b020b94 | 2006-11-24 17:14:31 -0800 | [diff] [blame] | 77 | static void dn_ifaddr_notify(int event, struct dn_ifaddr *ifa); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | |
| 79 | static int dn_eth_up(struct net_device *); |
| 80 | static void dn_eth_down(struct net_device *); |
| 81 | static void dn_send_brd_hello(struct net_device *dev, struct dn_ifaddr *ifa); |
| 82 | static void dn_send_ptp_hello(struct net_device *dev, struct dn_ifaddr *ifa); |
| 83 | |
| 84 | static struct dn_dev_parms dn_dev_list[] = { |
| 85 | { |
| 86 | .type = ARPHRD_ETHER, /* Ethernet */ |
| 87 | .mode = DN_DEV_BCAST, |
| 88 | .state = DN_DEV_S_RU, |
| 89 | .t2 = 1, |
| 90 | .t3 = 10, |
| 91 | .name = "ethernet", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | .up = dn_eth_up, |
| 93 | .down = dn_eth_down, |
| 94 | .timer3 = dn_send_brd_hello, |
| 95 | }, |
| 96 | { |
| 97 | .type = ARPHRD_IPGRE, /* DECnet tunneled over GRE in IP */ |
| 98 | .mode = DN_DEV_BCAST, |
| 99 | .state = DN_DEV_S_RU, |
| 100 | .t2 = 1, |
| 101 | .t3 = 10, |
| 102 | .name = "ipgre", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | .timer3 = dn_send_brd_hello, |
| 104 | }, |
| 105 | #if 0 |
| 106 | { |
| 107 | .type = ARPHRD_X25, /* Bog standard X.25 */ |
| 108 | .mode = DN_DEV_UCAST, |
| 109 | .state = DN_DEV_S_DS, |
| 110 | .t2 = 1, |
| 111 | .t3 = 120, |
| 112 | .name = "x25", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | .timer3 = dn_send_ptp_hello, |
| 114 | }, |
| 115 | #endif |
| 116 | #if 0 |
| 117 | { |
| 118 | .type = ARPHRD_PPP, /* DECnet over PPP */ |
| 119 | .mode = DN_DEV_BCAST, |
| 120 | .state = DN_DEV_S_RU, |
| 121 | .t2 = 1, |
| 122 | .t3 = 10, |
| 123 | .name = "ppp", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | .timer3 = dn_send_brd_hello, |
| 125 | }, |
| 126 | #endif |
| 127 | { |
| 128 | .type = ARPHRD_DDCMP, /* DECnet over DDCMP */ |
| 129 | .mode = DN_DEV_UCAST, |
| 130 | .state = DN_DEV_S_DS, |
| 131 | .t2 = 1, |
| 132 | .t3 = 120, |
| 133 | .name = "ddcmp", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | .timer3 = dn_send_ptp_hello, |
| 135 | }, |
| 136 | { |
| 137 | .type = ARPHRD_LOOPBACK, /* Loopback interface - always last */ |
| 138 | .mode = DN_DEV_BCAST, |
| 139 | .state = DN_DEV_S_RU, |
| 140 | .t2 = 1, |
| 141 | .t3 = 10, |
| 142 | .name = "loopback", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | .timer3 = dn_send_brd_hello, |
| 144 | } |
| 145 | }; |
| 146 | |
Denis Cheng | 8b14a53 | 2007-09-16 16:41:29 -0700 | [diff] [blame] | 147 | #define DN_DEV_LIST_SIZE ARRAY_SIZE(dn_dev_list) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | |
David S. Miller | 8fa0b31 | 2008-10-15 15:59:50 -0700 | [diff] [blame] | 149 | #define DN_DEV_PARMS_OFFSET(x) offsetof(struct dn_dev_parms, x) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | |
| 151 | #ifdef CONFIG_SYSCTL |
| 152 | |
| 153 | static int min_t2[] = { 1 }; |
| 154 | static int max_t2[] = { 60 }; /* No max specified, but this seems sensible */ |
| 155 | static int min_t3[] = { 1 }; |
| 156 | static int max_t3[] = { 8191 }; /* Must fit in 16 bits when multiplied by BCT3MULT or T3MULT */ |
| 157 | |
| 158 | static int min_priority[1]; |
| 159 | static int max_priority[] = { 127 }; /* From DECnet spec */ |
| 160 | |
Alexey Dobriyan | 8d65af7 | 2009-09-23 15:57:19 -0700 | [diff] [blame] | 161 | static int dn_forwarding_proc(ctl_table *, int, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | void __user *, size_t *, loff_t *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | static struct dn_dev_sysctl_table { |
| 164 | struct ctl_table_header *sysctl_header; |
| 165 | ctl_table dn_dev_vars[5]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | } dn_dev_sysctl = { |
| 167 | NULL, |
| 168 | { |
| 169 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | .procname = "forwarding", |
| 171 | .data = (void *)DN_DEV_PARMS_OFFSET(forwarding), |
| 172 | .maxlen = sizeof(int), |
| 173 | .mode = 0644, |
| 174 | .proc_handler = dn_forwarding_proc, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | }, |
| 176 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | .procname = "priority", |
| 178 | .data = (void *)DN_DEV_PARMS_OFFSET(priority), |
| 179 | .maxlen = sizeof(int), |
| 180 | .mode = 0644, |
| 181 | .proc_handler = proc_dointvec_minmax, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | .extra1 = &min_priority, |
| 183 | .extra2 = &max_priority |
| 184 | }, |
| 185 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | .procname = "t2", |
| 187 | .data = (void *)DN_DEV_PARMS_OFFSET(t2), |
| 188 | .maxlen = sizeof(int), |
| 189 | .mode = 0644, |
| 190 | .proc_handler = proc_dointvec_minmax, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | .extra1 = &min_t2, |
| 192 | .extra2 = &max_t2 |
| 193 | }, |
| 194 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | .procname = "t3", |
| 196 | .data = (void *)DN_DEV_PARMS_OFFSET(t3), |
| 197 | .maxlen = sizeof(int), |
| 198 | .mode = 0644, |
| 199 | .proc_handler = proc_dointvec_minmax, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | .extra1 = &min_t3, |
| 201 | .extra2 = &max_t3 |
| 202 | }, |
| 203 | {0} |
| 204 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 205 | }; |
| 206 | |
| 207 | static void dn_dev_sysctl_register(struct net_device *dev, struct dn_dev_parms *parms) |
| 208 | { |
| 209 | struct dn_dev_sysctl_table *t; |
| 210 | int i; |
| 211 | |
Pavel Emelyanov | 3151a9a | 2008-01-09 00:31:49 -0800 | [diff] [blame] | 212 | #define DN_CTL_PATH_DEV 3 |
| 213 | |
| 214 | struct ctl_path dn_ctl_path[] = { |
Eric W. Biederman | f8572d8 | 2009-11-05 13:32:03 -0800 | [diff] [blame^] | 215 | { .procname = "net", }, |
| 216 | { .procname = "decnet", }, |
| 217 | { .procname = "conf", }, |
Pavel Emelyanov | 3151a9a | 2008-01-09 00:31:49 -0800 | [diff] [blame] | 218 | { /* to be set */ }, |
| 219 | { }, |
| 220 | }; |
| 221 | |
Arnaldo Carvalho de Melo | c66b721 | 2006-11-17 12:29:21 -0200 | [diff] [blame] | 222 | t = kmemdup(&dn_dev_sysctl, sizeof(*t), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | if (t == NULL) |
| 224 | return; |
| 225 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | for(i = 0; i < ARRAY_SIZE(t->dn_dev_vars) - 1; i++) { |
| 227 | long offset = (long)t->dn_dev_vars[i].data; |
| 228 | t->dn_dev_vars[i].data = ((char *)parms) + offset; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 229 | } |
| 230 | |
| 231 | if (dev) { |
Pavel Emelyanov | 3151a9a | 2008-01-09 00:31:49 -0800 | [diff] [blame] | 232 | dn_ctl_path[DN_CTL_PATH_DEV].procname = dev->name; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | } else { |
Pavel Emelyanov | 3151a9a | 2008-01-09 00:31:49 -0800 | [diff] [blame] | 234 | dn_ctl_path[DN_CTL_PATH_DEV].procname = parms->name; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | } |
| 236 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | t->dn_dev_vars[0].extra1 = (void *)dev; |
| 238 | |
Pavel Emelyanov | 3151a9a | 2008-01-09 00:31:49 -0800 | [diff] [blame] | 239 | t->sysctl_header = register_sysctl_paths(dn_ctl_path, t->dn_dev_vars); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | if (t->sysctl_header == NULL) |
| 241 | kfree(t); |
| 242 | else |
| 243 | parms->sysctl = t; |
| 244 | } |
| 245 | |
| 246 | static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms) |
| 247 | { |
| 248 | if (parms->sysctl) { |
| 249 | struct dn_dev_sysctl_table *t = parms->sysctl; |
| 250 | parms->sysctl = NULL; |
| 251 | unregister_sysctl_table(t->sysctl_header); |
| 252 | kfree(t); |
| 253 | } |
| 254 | } |
| 255 | |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 256 | static int dn_forwarding_proc(ctl_table *table, int write, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | void __user *buffer, |
| 258 | size_t *lenp, loff_t *ppos) |
| 259 | { |
| 260 | #ifdef CONFIG_DECNET_ROUTER |
| 261 | struct net_device *dev = table->extra1; |
| 262 | struct dn_dev *dn_db; |
| 263 | int err; |
| 264 | int tmp, old; |
| 265 | |
| 266 | if (table->extra1 == NULL) |
| 267 | return -EINVAL; |
| 268 | |
| 269 | dn_db = dev->dn_ptr; |
| 270 | old = dn_db->parms.forwarding; |
| 271 | |
Alexey Dobriyan | 8d65af7 | 2009-09-23 15:57:19 -0700 | [diff] [blame] | 272 | err = proc_dointvec(table, write, buffer, lenp, ppos); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | |
| 274 | if ((err >= 0) && write) { |
| 275 | if (dn_db->parms.forwarding < 0) |
| 276 | dn_db->parms.forwarding = 0; |
| 277 | if (dn_db->parms.forwarding > 2) |
| 278 | dn_db->parms.forwarding = 2; |
| 279 | /* |
| 280 | * What an ugly hack this is... its works, just. It |
| 281 | * would be nice if sysctl/proc were just that little |
| 282 | * bit more flexible so I don't have to write a special |
| 283 | * routine, or suffer hacks like this - SJW |
| 284 | */ |
| 285 | tmp = dn_db->parms.forwarding; |
| 286 | dn_db->parms.forwarding = old; |
| 287 | if (dn_db->parms.down) |
| 288 | dn_db->parms.down(dev); |
| 289 | dn_db->parms.forwarding = tmp; |
| 290 | if (dn_db->parms.up) |
| 291 | dn_db->parms.up(dev); |
| 292 | } |
| 293 | |
| 294 | return err; |
| 295 | #else |
| 296 | return -EINVAL; |
| 297 | #endif |
| 298 | } |
| 299 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | #else /* CONFIG_SYSCTL */ |
| 301 | static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms) |
| 302 | { |
| 303 | } |
| 304 | static void dn_dev_sysctl_register(struct net_device *dev, struct dn_dev_parms *parms) |
| 305 | { |
| 306 | } |
| 307 | |
| 308 | #endif /* CONFIG_SYSCTL */ |
| 309 | |
| 310 | static inline __u16 mtu2blksize(struct net_device *dev) |
| 311 | { |
| 312 | u32 blksize = dev->mtu; |
| 313 | if (blksize > 0xffff) |
| 314 | blksize = 0xffff; |
| 315 | |
| 316 | if (dev->type == ARPHRD_ETHER || |
| 317 | dev->type == ARPHRD_PPP || |
| 318 | dev->type == ARPHRD_IPGRE || |
| 319 | dev->type == ARPHRD_LOOPBACK) |
| 320 | blksize -= 2; |
| 321 | |
| 322 | return (__u16)blksize; |
| 323 | } |
| 324 | |
| 325 | static struct dn_ifaddr *dn_dev_alloc_ifa(void) |
| 326 | { |
| 327 | struct dn_ifaddr *ifa; |
| 328 | |
Panagiotis Issaris | 0da974f | 2006-07-21 14:51:30 -0700 | [diff] [blame] | 329 | ifa = kzalloc(sizeof(*ifa), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | |
| 331 | return ifa; |
| 332 | } |
| 333 | |
| 334 | static __inline__ void dn_dev_free_ifa(struct dn_ifaddr *ifa) |
| 335 | { |
| 336 | kfree(ifa); |
| 337 | } |
| 338 | |
| 339 | static void dn_dev_del_ifa(struct dn_dev *dn_db, struct dn_ifaddr **ifap, int destroy) |
| 340 | { |
| 341 | struct dn_ifaddr *ifa1 = *ifap; |
| 342 | unsigned char mac_addr[6]; |
| 343 | struct net_device *dev = dn_db->dev; |
| 344 | |
| 345 | ASSERT_RTNL(); |
| 346 | |
| 347 | *ifap = ifa1->ifa_next; |
| 348 | |
| 349 | if (dn_db->dev->type == ARPHRD_ETHER) { |
Steven Whitehouse | c4ea94a | 2006-03-20 22:42:39 -0800 | [diff] [blame] | 350 | if (ifa1->ifa_local != dn_eth2dn(dev->dev_addr)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 351 | dn_dn2eth(mac_addr, ifa1->ifa_local); |
| 352 | dev_mc_delete(dev, mac_addr, ETH_ALEN, 0); |
| 353 | } |
| 354 | } |
| 355 | |
Thomas Graf | b020b94 | 2006-11-24 17:14:31 -0800 | [diff] [blame] | 356 | dn_ifaddr_notify(RTM_DELADDR, ifa1); |
Alan Stern | e041c68 | 2006-03-27 01:16:30 -0800 | [diff] [blame] | 357 | blocking_notifier_call_chain(&dnaddr_chain, NETDEV_DOWN, ifa1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | if (destroy) { |
| 359 | dn_dev_free_ifa(ifa1); |
| 360 | |
| 361 | if (dn_db->ifa_list == NULL) |
| 362 | dn_dev_delete(dn_db->dev); |
| 363 | } |
| 364 | } |
| 365 | |
| 366 | static int dn_dev_insert_ifa(struct dn_dev *dn_db, struct dn_ifaddr *ifa) |
| 367 | { |
| 368 | struct net_device *dev = dn_db->dev; |
| 369 | struct dn_ifaddr *ifa1; |
| 370 | unsigned char mac_addr[6]; |
| 371 | |
| 372 | ASSERT_RTNL(); |
| 373 | |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 374 | /* Check for duplicates */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | for(ifa1 = dn_db->ifa_list; ifa1; ifa1 = ifa1->ifa_next) { |
| 376 | if (ifa1->ifa_local == ifa->ifa_local) |
| 377 | return -EEXIST; |
| 378 | } |
| 379 | |
| 380 | if (dev->type == ARPHRD_ETHER) { |
Steven Whitehouse | c4ea94a | 2006-03-20 22:42:39 -0800 | [diff] [blame] | 381 | if (ifa->ifa_local != dn_eth2dn(dev->dev_addr)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | dn_dn2eth(mac_addr, ifa->ifa_local); |
| 383 | dev_mc_add(dev, mac_addr, ETH_ALEN, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | } |
| 385 | } |
| 386 | |
| 387 | ifa->ifa_next = dn_db->ifa_list; |
| 388 | dn_db->ifa_list = ifa; |
| 389 | |
Thomas Graf | b020b94 | 2006-11-24 17:14:31 -0800 | [diff] [blame] | 390 | dn_ifaddr_notify(RTM_NEWADDR, ifa); |
Alan Stern | e041c68 | 2006-03-27 01:16:30 -0800 | [diff] [blame] | 391 | blocking_notifier_call_chain(&dnaddr_chain, NETDEV_UP, ifa); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 392 | |
| 393 | return 0; |
| 394 | } |
| 395 | |
| 396 | static int dn_dev_set_ifa(struct net_device *dev, struct dn_ifaddr *ifa) |
| 397 | { |
| 398 | struct dn_dev *dn_db = dev->dn_ptr; |
| 399 | int rv; |
| 400 | |
| 401 | if (dn_db == NULL) { |
| 402 | int err; |
| 403 | dn_db = dn_dev_create(dev, &err); |
| 404 | if (dn_db == NULL) |
| 405 | return err; |
| 406 | } |
| 407 | |
| 408 | ifa->ifa_dev = dn_db; |
| 409 | |
| 410 | if (dev->flags & IFF_LOOPBACK) |
| 411 | ifa->ifa_scope = RT_SCOPE_HOST; |
| 412 | |
| 413 | rv = dn_dev_insert_ifa(dn_db, ifa); |
| 414 | if (rv) |
| 415 | dn_dev_free_ifa(ifa); |
| 416 | return rv; |
| 417 | } |
| 418 | |
| 419 | |
| 420 | int dn_dev_ioctl(unsigned int cmd, void __user *arg) |
| 421 | { |
| 422 | char buffer[DN_IFREQ_SIZE]; |
| 423 | struct ifreq *ifr = (struct ifreq *)buffer; |
| 424 | struct sockaddr_dn *sdn = (struct sockaddr_dn *)&ifr->ifr_addr; |
| 425 | struct dn_dev *dn_db; |
| 426 | struct net_device *dev; |
| 427 | struct dn_ifaddr *ifa = NULL, **ifap = NULL; |
| 428 | int ret = 0; |
| 429 | |
| 430 | if (copy_from_user(ifr, arg, DN_IFREQ_SIZE)) |
| 431 | return -EFAULT; |
| 432 | ifr->ifr_name[IFNAMSIZ-1] = 0; |
| 433 | |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 434 | dev_load(&init_net, ifr->ifr_name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | |
| 436 | switch(cmd) { |
| 437 | case SIOCGIFADDR: |
| 438 | break; |
| 439 | case SIOCSIFADDR: |
| 440 | if (!capable(CAP_NET_ADMIN)) |
| 441 | return -EACCES; |
| 442 | if (sdn->sdn_family != AF_DECnet) |
| 443 | return -EINVAL; |
| 444 | break; |
| 445 | default: |
| 446 | return -EINVAL; |
| 447 | } |
| 448 | |
| 449 | rtnl_lock(); |
| 450 | |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 451 | if ((dev = __dev_get_by_name(&init_net, ifr->ifr_name)) == NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | ret = -ENODEV; |
| 453 | goto done; |
| 454 | } |
| 455 | |
| 456 | if ((dn_db = dev->dn_ptr) != NULL) { |
| 457 | for (ifap = &dn_db->ifa_list; (ifa=*ifap) != NULL; ifap = &ifa->ifa_next) |
| 458 | if (strcmp(ifr->ifr_name, ifa->ifa_label) == 0) |
| 459 | break; |
| 460 | } |
| 461 | |
| 462 | if (ifa == NULL && cmd != SIOCSIFADDR) { |
| 463 | ret = -EADDRNOTAVAIL; |
| 464 | goto done; |
| 465 | } |
| 466 | |
| 467 | switch(cmd) { |
| 468 | case SIOCGIFADDR: |
Steven Whitehouse | c4ea94a | 2006-03-20 22:42:39 -0800 | [diff] [blame] | 469 | *((__le16 *)sdn->sdn_nodeaddr) = ifa->ifa_local; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 470 | goto rarok; |
| 471 | |
| 472 | case SIOCSIFADDR: |
| 473 | if (!ifa) { |
| 474 | if ((ifa = dn_dev_alloc_ifa()) == NULL) { |
| 475 | ret = -ENOBUFS; |
| 476 | break; |
| 477 | } |
| 478 | memcpy(ifa->ifa_label, dev->name, IFNAMSIZ); |
| 479 | } else { |
| 480 | if (ifa->ifa_local == dn_saddr2dn(sdn)) |
| 481 | break; |
| 482 | dn_dev_del_ifa(dn_db, ifap, 0); |
| 483 | } |
| 484 | |
| 485 | ifa->ifa_local = ifa->ifa_address = dn_saddr2dn(sdn); |
| 486 | |
| 487 | ret = dn_dev_set_ifa(dev, ifa); |
| 488 | } |
| 489 | done: |
| 490 | rtnl_unlock(); |
| 491 | |
| 492 | return ret; |
| 493 | rarok: |
| 494 | if (copy_to_user(arg, ifr, DN_IFREQ_SIZE)) |
| 495 | ret = -EFAULT; |
| 496 | goto done; |
| 497 | } |
| 498 | |
| 499 | struct net_device *dn_dev_get_default(void) |
| 500 | { |
| 501 | struct net_device *dev; |
| 502 | read_lock(&dndev_lock); |
| 503 | dev = decnet_default_device; |
| 504 | if (dev) { |
| 505 | if (dev->dn_ptr) |
| 506 | dev_hold(dev); |
| 507 | else |
| 508 | dev = NULL; |
| 509 | } |
| 510 | read_unlock(&dndev_lock); |
| 511 | return dev; |
| 512 | } |
| 513 | |
| 514 | int dn_dev_set_default(struct net_device *dev, int force) |
| 515 | { |
| 516 | struct net_device *old = NULL; |
| 517 | int rv = -EBUSY; |
| 518 | if (!dev->dn_ptr) |
| 519 | return -ENODEV; |
| 520 | write_lock(&dndev_lock); |
| 521 | if (force || decnet_default_device == NULL) { |
| 522 | old = decnet_default_device; |
| 523 | decnet_default_device = dev; |
| 524 | rv = 0; |
| 525 | } |
| 526 | write_unlock(&dndev_lock); |
| 527 | if (old) |
Patrick Caulfield | 6a57b2e | 2006-03-29 13:57:31 -0800 | [diff] [blame] | 528 | dev_put(old); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | return rv; |
| 530 | } |
| 531 | |
| 532 | static void dn_dev_check_default(struct net_device *dev) |
| 533 | { |
| 534 | write_lock(&dndev_lock); |
| 535 | if (dev == decnet_default_device) { |
| 536 | decnet_default_device = NULL; |
| 537 | } else { |
| 538 | dev = NULL; |
| 539 | } |
| 540 | write_unlock(&dndev_lock); |
| 541 | if (dev) |
| 542 | dev_put(dev); |
| 543 | } |
| 544 | |
| 545 | static struct dn_dev *dn_dev_by_index(int ifindex) |
| 546 | { |
| 547 | struct net_device *dev; |
| 548 | struct dn_dev *dn_dev = NULL; |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 549 | dev = dev_get_by_index(&init_net, ifindex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 550 | if (dev) { |
| 551 | dn_dev = dev->dn_ptr; |
| 552 | dev_put(dev); |
| 553 | } |
| 554 | |
| 555 | return dn_dev; |
| 556 | } |
| 557 | |
Patrick McHardy | ef7c79e | 2007-06-05 12:38:30 -0700 | [diff] [blame] | 558 | static const struct nla_policy dn_ifa_policy[IFA_MAX+1] = { |
Thomas Graf | 4a89c25 | 2006-11-24 17:14:51 -0800 | [diff] [blame] | 559 | [IFA_ADDRESS] = { .type = NLA_U16 }, |
| 560 | [IFA_LOCAL] = { .type = NLA_U16 }, |
| 561 | [IFA_LABEL] = { .type = NLA_STRING, |
| 562 | .len = IFNAMSIZ - 1 }, |
| 563 | }; |
| 564 | |
| 565 | static int dn_nl_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 566 | { |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 567 | struct net *net = sock_net(skb->sk); |
Thomas Graf | 4a89c25 | 2006-11-24 17:14:51 -0800 | [diff] [blame] | 568 | struct nlattr *tb[IFA_MAX+1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 569 | struct dn_dev *dn_db; |
Thomas Graf | 4a89c25 | 2006-11-24 17:14:51 -0800 | [diff] [blame] | 570 | struct ifaddrmsg *ifm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | struct dn_ifaddr *ifa, **ifap; |
Denis V. Lunev | b854272 | 2007-12-01 00:21:31 +1100 | [diff] [blame] | 572 | int err = -EINVAL; |
| 573 | |
| 574 | if (net != &init_net) |
| 575 | goto errout; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 576 | |
Thomas Graf | 4a89c25 | 2006-11-24 17:14:51 -0800 | [diff] [blame] | 577 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, dn_ifa_policy); |
| 578 | if (err < 0) |
| 579 | goto errout; |
| 580 | |
Pavel Emelyanov | 3ccd862 | 2007-11-30 23:43:31 +1100 | [diff] [blame] | 581 | err = -ENODEV; |
Thomas Graf | 4a89c25 | 2006-11-24 17:14:51 -0800 | [diff] [blame] | 582 | ifm = nlmsg_data(nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 583 | if ((dn_db = dn_dev_by_index(ifm->ifa_index)) == NULL) |
Thomas Graf | 4a89c25 | 2006-11-24 17:14:51 -0800 | [diff] [blame] | 584 | goto errout; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 585 | |
Pavel Emelyanov | 3ccd862 | 2007-11-30 23:43:31 +1100 | [diff] [blame] | 586 | err = -EADDRNOTAVAIL; |
Thomas Graf | 4a89c25 | 2006-11-24 17:14:51 -0800 | [diff] [blame] | 587 | for (ifap = &dn_db->ifa_list; (ifa = *ifap); ifap = &ifa->ifa_next) { |
| 588 | if (tb[IFA_LOCAL] && |
| 589 | nla_memcmp(tb[IFA_LOCAL], &ifa->ifa_local, 2)) |
| 590 | continue; |
| 591 | |
| 592 | if (tb[IFA_LABEL] && nla_strcmp(tb[IFA_LABEL], ifa->ifa_label)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | continue; |
| 594 | |
| 595 | dn_dev_del_ifa(dn_db, ifap, 1); |
| 596 | return 0; |
| 597 | } |
| 598 | |
Thomas Graf | 4a89c25 | 2006-11-24 17:14:51 -0800 | [diff] [blame] | 599 | errout: |
| 600 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 601 | } |
| 602 | |
Thomas Graf | 4a89c25 | 2006-11-24 17:14:51 -0800 | [diff] [blame] | 603 | static int dn_nl_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 604 | { |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 605 | struct net *net = sock_net(skb->sk); |
Thomas Graf | 4a89c25 | 2006-11-24 17:14:51 -0800 | [diff] [blame] | 606 | struct nlattr *tb[IFA_MAX+1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 607 | struct net_device *dev; |
| 608 | struct dn_dev *dn_db; |
Thomas Graf | 4a89c25 | 2006-11-24 17:14:51 -0800 | [diff] [blame] | 609 | struct ifaddrmsg *ifm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 610 | struct dn_ifaddr *ifa; |
Thomas Graf | 4a89c25 | 2006-11-24 17:14:51 -0800 | [diff] [blame] | 611 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 612 | |
Denis V. Lunev | b854272 | 2007-12-01 00:21:31 +1100 | [diff] [blame] | 613 | if (net != &init_net) |
| 614 | return -EINVAL; |
| 615 | |
Thomas Graf | 4a89c25 | 2006-11-24 17:14:51 -0800 | [diff] [blame] | 616 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, dn_ifa_policy); |
| 617 | if (err < 0) |
| 618 | return err; |
| 619 | |
| 620 | if (tb[IFA_LOCAL] == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 621 | return -EINVAL; |
| 622 | |
Thomas Graf | 4a89c25 | 2006-11-24 17:14:51 -0800 | [diff] [blame] | 623 | ifm = nlmsg_data(nlh); |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 624 | if ((dev = __dev_get_by_index(&init_net, ifm->ifa_index)) == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 625 | return -ENODEV; |
| 626 | |
| 627 | if ((dn_db = dev->dn_ptr) == NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 628 | dn_db = dn_dev_create(dev, &err); |
| 629 | if (!dn_db) |
| 630 | return err; |
| 631 | } |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 632 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 633 | if ((ifa = dn_dev_alloc_ifa()) == NULL) |
| 634 | return -ENOBUFS; |
| 635 | |
Thomas Graf | 4a89c25 | 2006-11-24 17:14:51 -0800 | [diff] [blame] | 636 | if (tb[IFA_ADDRESS] == NULL) |
| 637 | tb[IFA_ADDRESS] = tb[IFA_LOCAL]; |
| 638 | |
| 639 | ifa->ifa_local = nla_get_le16(tb[IFA_LOCAL]); |
| 640 | ifa->ifa_address = nla_get_le16(tb[IFA_ADDRESS]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 641 | ifa->ifa_flags = ifm->ifa_flags; |
| 642 | ifa->ifa_scope = ifm->ifa_scope; |
| 643 | ifa->ifa_dev = dn_db; |
Thomas Graf | 4a89c25 | 2006-11-24 17:14:51 -0800 | [diff] [blame] | 644 | |
| 645 | if (tb[IFA_LABEL]) |
| 646 | nla_strlcpy(ifa->ifa_label, tb[IFA_LABEL], IFNAMSIZ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 647 | else |
| 648 | memcpy(ifa->ifa_label, dev->name, IFNAMSIZ); |
| 649 | |
Thomas Graf | 4a89c25 | 2006-11-24 17:14:51 -0800 | [diff] [blame] | 650 | err = dn_dev_insert_ifa(dn_db, ifa); |
| 651 | if (err) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 652 | dn_dev_free_ifa(ifa); |
Thomas Graf | 4a89c25 | 2006-11-24 17:14:51 -0800 | [diff] [blame] | 653 | |
| 654 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 655 | } |
| 656 | |
Thomas Graf | a6f01ca | 2006-11-24 17:14:07 -0800 | [diff] [blame] | 657 | static inline size_t dn_ifaddr_nlmsg_size(void) |
| 658 | { |
| 659 | return NLMSG_ALIGN(sizeof(struct ifaddrmsg)) |
| 660 | + nla_total_size(IFNAMSIZ) /* IFA_LABEL */ |
| 661 | + nla_total_size(2) /* IFA_ADDRESS */ |
| 662 | + nla_total_size(2); /* IFA_LOCAL */ |
| 663 | } |
| 664 | |
Thomas Graf | 4a89c25 | 2006-11-24 17:14:51 -0800 | [diff] [blame] | 665 | static int dn_nl_fill_ifaddr(struct sk_buff *skb, struct dn_ifaddr *ifa, |
| 666 | u32 pid, u32 seq, int event, unsigned int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 667 | { |
| 668 | struct ifaddrmsg *ifm; |
| 669 | struct nlmsghdr *nlh; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 670 | |
Thomas Graf | 4a89c25 | 2006-11-24 17:14:51 -0800 | [diff] [blame] | 671 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*ifm), flags); |
| 672 | if (nlh == NULL) |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 673 | return -EMSGSIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 674 | |
Thomas Graf | 4a89c25 | 2006-11-24 17:14:51 -0800 | [diff] [blame] | 675 | ifm = nlmsg_data(nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 676 | ifm->ifa_family = AF_DECnet; |
| 677 | ifm->ifa_prefixlen = 16; |
| 678 | ifm->ifa_flags = ifa->ifa_flags | IFA_F_PERMANENT; |
| 679 | ifm->ifa_scope = ifa->ifa_scope; |
| 680 | ifm->ifa_index = ifa->ifa_dev->dev->ifindex; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 681 | |
Thomas Graf | 4a89c25 | 2006-11-24 17:14:51 -0800 | [diff] [blame] | 682 | if (ifa->ifa_address) |
| 683 | NLA_PUT_LE16(skb, IFA_ADDRESS, ifa->ifa_address); |
| 684 | if (ifa->ifa_local) |
| 685 | NLA_PUT_LE16(skb, IFA_LOCAL, ifa->ifa_local); |
| 686 | if (ifa->ifa_label[0]) |
| 687 | NLA_PUT_STRING(skb, IFA_LABEL, ifa->ifa_label); |
| 688 | |
| 689 | return nlmsg_end(skb, nlh); |
| 690 | |
| 691 | nla_put_failure: |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 692 | nlmsg_cancel(skb, nlh); |
| 693 | return -EMSGSIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 694 | } |
| 695 | |
Thomas Graf | b020b94 | 2006-11-24 17:14:31 -0800 | [diff] [blame] | 696 | static void dn_ifaddr_notify(int event, struct dn_ifaddr *ifa) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 697 | { |
| 698 | struct sk_buff *skb; |
Thomas Graf | dc738dd | 2006-08-15 00:33:35 -0700 | [diff] [blame] | 699 | int err = -ENOBUFS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 700 | |
Thomas Graf | a6f01ca | 2006-11-24 17:14:07 -0800 | [diff] [blame] | 701 | skb = alloc_skb(dn_ifaddr_nlmsg_size(), GFP_KERNEL); |
Thomas Graf | dc738dd | 2006-08-15 00:33:35 -0700 | [diff] [blame] | 702 | if (skb == NULL) |
| 703 | goto errout; |
| 704 | |
Thomas Graf | 4a89c25 | 2006-11-24 17:14:51 -0800 | [diff] [blame] | 705 | err = dn_nl_fill_ifaddr(skb, ifa, 0, 0, event, 0); |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 706 | if (err < 0) { |
| 707 | /* -EMSGSIZE implies BUG in dn_ifaddr_nlmsg_size() */ |
| 708 | WARN_ON(err == -EMSGSIZE); |
| 709 | kfree_skb(skb); |
| 710 | goto errout; |
| 711 | } |
Pablo Neira Ayuso | 1ce85fe | 2009-02-24 23:18:28 -0800 | [diff] [blame] | 712 | rtnl_notify(skb, &init_net, 0, RTNLGRP_DECnet_IFADDR, NULL, GFP_KERNEL); |
| 713 | return; |
Thomas Graf | dc738dd | 2006-08-15 00:33:35 -0700 | [diff] [blame] | 714 | errout: |
| 715 | if (err < 0) |
Denis V. Lunev | 97c53ca | 2007-11-19 22:26:51 -0800 | [diff] [blame] | 716 | rtnl_set_sk_err(&init_net, RTNLGRP_DECnet_IFADDR, err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 717 | } |
| 718 | |
Thomas Graf | 4a89c25 | 2006-11-24 17:14:51 -0800 | [diff] [blame] | 719 | static int dn_nl_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 720 | { |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 721 | struct net *net = sock_net(skb->sk); |
Thomas Graf | 4a89c25 | 2006-11-24 17:14:51 -0800 | [diff] [blame] | 722 | int idx, dn_idx = 0, skip_ndevs, skip_naddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 723 | struct net_device *dev; |
| 724 | struct dn_dev *dn_db; |
| 725 | struct dn_ifaddr *ifa; |
| 726 | |
Denis V. Lunev | b854272 | 2007-12-01 00:21:31 +1100 | [diff] [blame] | 727 | if (net != &init_net) |
| 728 | return 0; |
| 729 | |
Thomas Graf | 4a89c25 | 2006-11-24 17:14:51 -0800 | [diff] [blame] | 730 | skip_ndevs = cb->args[0]; |
| 731 | skip_naddr = cb->args[1]; |
| 732 | |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 733 | idx = 0; |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 734 | for_each_netdev(&init_net, dev) { |
Thomas Graf | 4a89c25 | 2006-11-24 17:14:51 -0800 | [diff] [blame] | 735 | if (idx < skip_ndevs) |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 736 | goto cont; |
Thomas Graf | 4a89c25 | 2006-11-24 17:14:51 -0800 | [diff] [blame] | 737 | else if (idx > skip_ndevs) { |
| 738 | /* Only skip over addresses for first dev dumped |
| 739 | * in this iteration (idx == skip_ndevs) */ |
| 740 | skip_naddr = 0; |
| 741 | } |
| 742 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 743 | if ((dn_db = dev->dn_ptr) == NULL) |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 744 | goto cont; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 745 | |
Thomas Graf | 4a89c25 | 2006-11-24 17:14:51 -0800 | [diff] [blame] | 746 | for (ifa = dn_db->ifa_list, dn_idx = 0; ifa; |
| 747 | ifa = ifa->ifa_next, dn_idx++) { |
| 748 | if (dn_idx < skip_naddr) |
Patrick McHardy | a2221f3 | 2007-09-11 10:45:15 +0200 | [diff] [blame] | 749 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 750 | |
Thomas Graf | 4a89c25 | 2006-11-24 17:14:51 -0800 | [diff] [blame] | 751 | if (dn_nl_fill_ifaddr(skb, ifa, NETLINK_CB(cb->skb).pid, |
| 752 | cb->nlh->nlmsg_seq, RTM_NEWADDR, |
| 753 | NLM_F_MULTI) < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 754 | goto done; |
| 755 | } |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 756 | cont: |
| 757 | idx++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 758 | } |
| 759 | done: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 760 | cb->args[0] = idx; |
| 761 | cb->args[1] = dn_idx; |
| 762 | |
| 763 | return skb->len; |
| 764 | } |
| 765 | |
Steven Whitehouse | c4ea94a | 2006-03-20 22:42:39 -0800 | [diff] [blame] | 766 | static int dn_dev_get_first(struct net_device *dev, __le16 *addr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 767 | { |
| 768 | struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr; |
| 769 | struct dn_ifaddr *ifa; |
| 770 | int rv = -ENODEV; |
| 771 | if (dn_db == NULL) |
| 772 | goto out; |
| 773 | ifa = dn_db->ifa_list; |
| 774 | if (ifa != NULL) { |
| 775 | *addr = ifa->ifa_local; |
| 776 | rv = 0; |
| 777 | } |
| 778 | out: |
| 779 | return rv; |
| 780 | } |
| 781 | |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 782 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 783 | * Find a default address to bind to. |
| 784 | * |
| 785 | * This is one of those areas where the initial VMS concepts don't really |
| 786 | * map onto the Linux concepts, and since we introduced multiple addresses |
| 787 | * per interface we have to cope with slightly odd ways of finding out what |
| 788 | * "our address" really is. Mostly it's not a problem; for this we just guess |
| 789 | * a sensible default. Eventually the routing code will take care of all the |
| 790 | * nasties for us I hope. |
| 791 | */ |
Steven Whitehouse | c4ea94a | 2006-03-20 22:42:39 -0800 | [diff] [blame] | 792 | int dn_dev_bind_default(__le16 *addr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 793 | { |
| 794 | struct net_device *dev; |
| 795 | int rv; |
| 796 | dev = dn_dev_get_default(); |
| 797 | last_chance: |
| 798 | if (dev) { |
| 799 | read_lock(&dev_base_lock); |
| 800 | rv = dn_dev_get_first(dev, addr); |
| 801 | read_unlock(&dev_base_lock); |
| 802 | dev_put(dev); |
Eric W. Biederman | 2774c7a | 2007-09-26 22:10:56 -0700 | [diff] [blame] | 803 | if (rv == 0 || dev == init_net.loopback_dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 804 | return rv; |
| 805 | } |
Eric W. Biederman | 2774c7a | 2007-09-26 22:10:56 -0700 | [diff] [blame] | 806 | dev = init_net.loopback_dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 807 | dev_hold(dev); |
| 808 | goto last_chance; |
| 809 | } |
| 810 | |
| 811 | static void dn_send_endnode_hello(struct net_device *dev, struct dn_ifaddr *ifa) |
| 812 | { |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 813 | struct endnode_hello_message *msg; |
| 814 | struct sk_buff *skb = NULL; |
| 815 | __le16 *pktlen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 816 | struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr; |
| 817 | |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 818 | if ((skb = dn_alloc_skb(NULL, sizeof(*msg), GFP_ATOMIC)) == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 819 | return; |
| 820 | |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 821 | skb->dev = dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 822 | |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 823 | msg = (struct endnode_hello_message *)skb_put(skb,sizeof(*msg)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 824 | |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 825 | msg->msgflg = 0x0D; |
| 826 | memcpy(msg->tiver, dn_eco_version, 3); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 827 | dn_dn2eth(msg->id, ifa->ifa_local); |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 828 | msg->iinfo = DN_RT_INFO_ENDN; |
Harvey Harrison | c4106aa | 2008-11-27 00:12:47 -0800 | [diff] [blame] | 829 | msg->blksize = cpu_to_le16(mtu2blksize(dev)); |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 830 | msg->area = 0x00; |
| 831 | memset(msg->seed, 0, 8); |
| 832 | memcpy(msg->neighbor, dn_hiord, ETH_ALEN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 833 | |
| 834 | if (dn_db->router) { |
| 835 | struct dn_neigh *dn = (struct dn_neigh *)dn_db->router; |
| 836 | dn_dn2eth(msg->neighbor, dn->addr); |
| 837 | } |
| 838 | |
Harvey Harrison | c4106aa | 2008-11-27 00:12:47 -0800 | [diff] [blame] | 839 | msg->timer = cpu_to_le16((unsigned short)dn_db->parms.t3); |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 840 | msg->mpd = 0x00; |
| 841 | msg->datalen = 0x02; |
| 842 | memset(msg->data, 0xAA, 2); |
| 843 | |
| 844 | pktlen = (__le16 *)skb_push(skb,2); |
Harvey Harrison | c4106aa | 2008-11-27 00:12:47 -0800 | [diff] [blame] | 845 | *pktlen = cpu_to_le16(skb->len - 2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 846 | |
Arnaldo Carvalho de Melo | c1d2bbe | 2007-04-10 20:45:18 -0700 | [diff] [blame] | 847 | skb_reset_network_header(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 848 | |
| 849 | dn_rt_finish_output(skb, dn_rt_all_rt_mcast, msg->id); |
| 850 | } |
| 851 | |
| 852 | |
| 853 | #define DRDELAY (5 * HZ) |
| 854 | |
| 855 | static int dn_am_i_a_router(struct dn_neigh *dn, struct dn_dev *dn_db, struct dn_ifaddr *ifa) |
| 856 | { |
| 857 | /* First check time since device went up */ |
| 858 | if ((jiffies - dn_db->uptime) < DRDELAY) |
| 859 | return 0; |
| 860 | |
| 861 | /* If there is no router, then yes... */ |
| 862 | if (!dn_db->router) |
| 863 | return 1; |
| 864 | |
| 865 | /* otherwise only if we have a higher priority or.. */ |
| 866 | if (dn->priority < dn_db->parms.priority) |
| 867 | return 1; |
| 868 | |
| 869 | /* if we have equal priority and a higher node number */ |
| 870 | if (dn->priority != dn_db->parms.priority) |
| 871 | return 0; |
| 872 | |
Harvey Harrison | c4106aa | 2008-11-27 00:12:47 -0800 | [diff] [blame] | 873 | if (le16_to_cpu(dn->addr) < le16_to_cpu(ifa->ifa_local)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 874 | return 1; |
| 875 | |
| 876 | return 0; |
| 877 | } |
| 878 | |
| 879 | static void dn_send_router_hello(struct net_device *dev, struct dn_ifaddr *ifa) |
| 880 | { |
| 881 | int n; |
| 882 | struct dn_dev *dn_db = dev->dn_ptr; |
| 883 | struct dn_neigh *dn = (struct dn_neigh *)dn_db->router; |
| 884 | struct sk_buff *skb; |
| 885 | size_t size; |
| 886 | unsigned char *ptr; |
| 887 | unsigned char *i1, *i2; |
Steven Whitehouse | c4ea94a | 2006-03-20 22:42:39 -0800 | [diff] [blame] | 888 | __le16 *pktlen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 889 | char *src; |
| 890 | |
| 891 | if (mtu2blksize(dev) < (26 + 7)) |
| 892 | return; |
| 893 | |
| 894 | n = mtu2blksize(dev) - 26; |
| 895 | n /= 7; |
| 896 | |
| 897 | if (n > 32) |
| 898 | n = 32; |
| 899 | |
| 900 | size = 2 + 26 + 7 * n; |
| 901 | |
| 902 | if ((skb = dn_alloc_skb(NULL, size, GFP_ATOMIC)) == NULL) |
| 903 | return; |
| 904 | |
| 905 | skb->dev = dev; |
| 906 | ptr = skb_put(skb, size); |
| 907 | |
| 908 | *ptr++ = DN_RT_PKT_CNTL | DN_RT_PKT_ERTH; |
| 909 | *ptr++ = 2; /* ECO */ |
| 910 | *ptr++ = 0; |
| 911 | *ptr++ = 0; |
| 912 | dn_dn2eth(ptr, ifa->ifa_local); |
| 913 | src = ptr; |
| 914 | ptr += ETH_ALEN; |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 915 | *ptr++ = dn_db->parms.forwarding == 1 ? |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 916 | DN_RT_INFO_L1RT : DN_RT_INFO_L2RT; |
Harvey Harrison | c4106aa | 2008-11-27 00:12:47 -0800 | [diff] [blame] | 917 | *((__le16 *)ptr) = cpu_to_le16(mtu2blksize(dev)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 918 | ptr += 2; |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 919 | *ptr++ = dn_db->parms.priority; /* Priority */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 920 | *ptr++ = 0; /* Area: Reserved */ |
Harvey Harrison | c4106aa | 2008-11-27 00:12:47 -0800 | [diff] [blame] | 921 | *((__le16 *)ptr) = cpu_to_le16((unsigned short)dn_db->parms.t3); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 922 | ptr += 2; |
| 923 | *ptr++ = 0; /* MPD: Reserved */ |
| 924 | i1 = ptr++; |
| 925 | memset(ptr, 0, 7); /* Name: Reserved */ |
| 926 | ptr += 7; |
| 927 | i2 = ptr++; |
| 928 | |
| 929 | n = dn_neigh_elist(dev, ptr, n); |
| 930 | |
| 931 | *i2 = 7 * n; |
| 932 | *i1 = 8 + *i2; |
| 933 | |
| 934 | skb_trim(skb, (27 + *i2)); |
| 935 | |
Steven Whitehouse | c4ea94a | 2006-03-20 22:42:39 -0800 | [diff] [blame] | 936 | pktlen = (__le16 *)skb_push(skb, 2); |
Harvey Harrison | c4106aa | 2008-11-27 00:12:47 -0800 | [diff] [blame] | 937 | *pktlen = cpu_to_le16(skb->len - 2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 938 | |
Arnaldo Carvalho de Melo | c1d2bbe | 2007-04-10 20:45:18 -0700 | [diff] [blame] | 939 | skb_reset_network_header(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 940 | |
| 941 | if (dn_am_i_a_router(dn, dn_db, ifa)) { |
| 942 | struct sk_buff *skb2 = skb_copy(skb, GFP_ATOMIC); |
| 943 | if (skb2) { |
| 944 | dn_rt_finish_output(skb2, dn_rt_all_end_mcast, src); |
| 945 | } |
| 946 | } |
| 947 | |
| 948 | dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src); |
| 949 | } |
| 950 | |
| 951 | static void dn_send_brd_hello(struct net_device *dev, struct dn_ifaddr *ifa) |
| 952 | { |
| 953 | struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr; |
| 954 | |
| 955 | if (dn_db->parms.forwarding == 0) |
| 956 | dn_send_endnode_hello(dev, ifa); |
| 957 | else |
| 958 | dn_send_router_hello(dev, ifa); |
| 959 | } |
| 960 | |
| 961 | static void dn_send_ptp_hello(struct net_device *dev, struct dn_ifaddr *ifa) |
| 962 | { |
| 963 | int tdlen = 16; |
| 964 | int size = dev->hard_header_len + 2 + 4 + tdlen; |
| 965 | struct sk_buff *skb = dn_alloc_skb(NULL, size, GFP_ATOMIC); |
| 966 | int i; |
| 967 | unsigned char *ptr; |
| 968 | char src[ETH_ALEN]; |
| 969 | |
| 970 | if (skb == NULL) |
| 971 | return ; |
| 972 | |
| 973 | skb->dev = dev; |
| 974 | skb_push(skb, dev->hard_header_len); |
| 975 | ptr = skb_put(skb, 2 + 4 + tdlen); |
| 976 | |
| 977 | *ptr++ = DN_RT_PKT_HELO; |
Steven Whitehouse | c4ea94a | 2006-03-20 22:42:39 -0800 | [diff] [blame] | 978 | *((__le16 *)ptr) = ifa->ifa_local; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 979 | ptr += 2; |
| 980 | *ptr++ = tdlen; |
| 981 | |
| 982 | for(i = 0; i < tdlen; i++) |
| 983 | *ptr++ = 0252; |
| 984 | |
| 985 | dn_dn2eth(src, ifa->ifa_local); |
| 986 | dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src); |
| 987 | } |
| 988 | |
| 989 | static int dn_eth_up(struct net_device *dev) |
| 990 | { |
| 991 | struct dn_dev *dn_db = dev->dn_ptr; |
| 992 | |
| 993 | if (dn_db->parms.forwarding == 0) |
| 994 | dev_mc_add(dev, dn_rt_all_end_mcast, ETH_ALEN, 0); |
| 995 | else |
| 996 | dev_mc_add(dev, dn_rt_all_rt_mcast, ETH_ALEN, 0); |
| 997 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 998 | dn_db->use_long = 1; |
| 999 | |
| 1000 | return 0; |
| 1001 | } |
| 1002 | |
| 1003 | static void dn_eth_down(struct net_device *dev) |
| 1004 | { |
| 1005 | struct dn_dev *dn_db = dev->dn_ptr; |
| 1006 | |
| 1007 | if (dn_db->parms.forwarding == 0) |
| 1008 | dev_mc_delete(dev, dn_rt_all_end_mcast, ETH_ALEN, 0); |
| 1009 | else |
| 1010 | dev_mc_delete(dev, dn_rt_all_rt_mcast, ETH_ALEN, 0); |
| 1011 | } |
| 1012 | |
| 1013 | static void dn_dev_set_timer(struct net_device *dev); |
| 1014 | |
| 1015 | static void dn_dev_timer_func(unsigned long arg) |
| 1016 | { |
| 1017 | struct net_device *dev = (struct net_device *)arg; |
| 1018 | struct dn_dev *dn_db = dev->dn_ptr; |
| 1019 | struct dn_ifaddr *ifa; |
| 1020 | |
| 1021 | if (dn_db->t3 <= dn_db->parms.t2) { |
| 1022 | if (dn_db->parms.timer3) { |
| 1023 | for(ifa = dn_db->ifa_list; ifa; ifa = ifa->ifa_next) { |
| 1024 | if (!(ifa->ifa_flags & IFA_F_SECONDARY)) |
| 1025 | dn_db->parms.timer3(dev, ifa); |
| 1026 | } |
| 1027 | } |
| 1028 | dn_db->t3 = dn_db->parms.t3; |
| 1029 | } else { |
| 1030 | dn_db->t3 -= dn_db->parms.t2; |
| 1031 | } |
| 1032 | |
| 1033 | dn_dev_set_timer(dev); |
| 1034 | } |
| 1035 | |
| 1036 | static void dn_dev_set_timer(struct net_device *dev) |
| 1037 | { |
| 1038 | struct dn_dev *dn_db = dev->dn_ptr; |
| 1039 | |
| 1040 | if (dn_db->parms.t2 > dn_db->parms.t3) |
| 1041 | dn_db->parms.t2 = dn_db->parms.t3; |
| 1042 | |
| 1043 | dn_db->timer.data = (unsigned long)dev; |
| 1044 | dn_db->timer.function = dn_dev_timer_func; |
| 1045 | dn_db->timer.expires = jiffies + (dn_db->parms.t2 * HZ); |
| 1046 | |
| 1047 | add_timer(&dn_db->timer); |
| 1048 | } |
| 1049 | |
Roel Kluin | 5eaa65b | 2008-12-10 15:18:31 -0800 | [diff] [blame] | 1050 | static struct dn_dev *dn_dev_create(struct net_device *dev, int *err) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1051 | { |
| 1052 | int i; |
| 1053 | struct dn_dev_parms *p = dn_dev_list; |
| 1054 | struct dn_dev *dn_db; |
| 1055 | |
| 1056 | for(i = 0; i < DN_DEV_LIST_SIZE; i++, p++) { |
| 1057 | if (p->type == dev->type) |
| 1058 | break; |
| 1059 | } |
| 1060 | |
| 1061 | *err = -ENODEV; |
| 1062 | if (i == DN_DEV_LIST_SIZE) |
| 1063 | return NULL; |
| 1064 | |
| 1065 | *err = -ENOBUFS; |
Panagiotis Issaris | 0da974f | 2006-07-21 14:51:30 -0700 | [diff] [blame] | 1066 | if ((dn_db = kzalloc(sizeof(struct dn_dev), GFP_ATOMIC)) == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1067 | return NULL; |
| 1068 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1069 | memcpy(&dn_db->parms, p, sizeof(struct dn_dev_parms)); |
| 1070 | smp_wmb(); |
| 1071 | dev->dn_ptr = dn_db; |
| 1072 | dn_db->dev = dev; |
| 1073 | init_timer(&dn_db->timer); |
| 1074 | |
| 1075 | dn_db->uptime = jiffies; |
Eric W. Biederman | 95743de | 2007-01-25 15:51:51 -0800 | [diff] [blame] | 1076 | |
| 1077 | dn_db->neigh_parms = neigh_parms_alloc(dev, &dn_neigh_table); |
| 1078 | if (!dn_db->neigh_parms) { |
| 1079 | dev->dn_ptr = NULL; |
| 1080 | kfree(dn_db); |
| 1081 | return NULL; |
| 1082 | } |
| 1083 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1084 | if (dn_db->parms.up) { |
| 1085 | if (dn_db->parms.up(dev) < 0) { |
Eric W. Biederman | 95743de | 2007-01-25 15:51:51 -0800 | [diff] [blame] | 1086 | neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1087 | dev->dn_ptr = NULL; |
| 1088 | kfree(dn_db); |
| 1089 | return NULL; |
| 1090 | } |
| 1091 | } |
| 1092 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1093 | dn_dev_sysctl_register(dev, &dn_db->parms); |
| 1094 | |
| 1095 | dn_dev_set_timer(dev); |
| 1096 | |
| 1097 | *err = 0; |
| 1098 | return dn_db; |
| 1099 | } |
| 1100 | |
| 1101 | |
| 1102 | /* |
| 1103 | * This processes a device up event. We only start up |
| 1104 | * the loopback device & ethernet devices with correct |
| 1105 | * MAC addreses automatically. Others must be started |
| 1106 | * specifically. |
| 1107 | * |
| 1108 | * FIXME: How should we configure the loopback address ? If we could dispense |
| 1109 | * with using decnet_address here and for autobind, it will be one less thing |
| 1110 | * for users to worry about setting up. |
| 1111 | */ |
| 1112 | |
| 1113 | void dn_dev_up(struct net_device *dev) |
| 1114 | { |
| 1115 | struct dn_ifaddr *ifa; |
Steven Whitehouse | c4ea94a | 2006-03-20 22:42:39 -0800 | [diff] [blame] | 1116 | __le16 addr = decnet_address; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1117 | int maybe_default = 0; |
| 1118 | struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr; |
| 1119 | |
| 1120 | if ((dev->type != ARPHRD_ETHER) && (dev->type != ARPHRD_LOOPBACK)) |
| 1121 | return; |
| 1122 | |
| 1123 | /* |
| 1124 | * Need to ensure that loopback device has a dn_db attached to it |
| 1125 | * to allow creation of neighbours against it, even though it might |
| 1126 | * not have a local address of its own. Might as well do the same for |
| 1127 | * all autoconfigured interfaces. |
| 1128 | */ |
| 1129 | if (dn_db == NULL) { |
| 1130 | int err; |
| 1131 | dn_db = dn_dev_create(dev, &err); |
| 1132 | if (dn_db == NULL) |
| 1133 | return; |
| 1134 | } |
| 1135 | |
| 1136 | if (dev->type == ARPHRD_ETHER) { |
| 1137 | if (memcmp(dev->dev_addr, dn_hiord, 4) != 0) |
| 1138 | return; |
Steven Whitehouse | c4ea94a | 2006-03-20 22:42:39 -0800 | [diff] [blame] | 1139 | addr = dn_eth2dn(dev->dev_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1140 | maybe_default = 1; |
| 1141 | } |
| 1142 | |
| 1143 | if (addr == 0) |
| 1144 | return; |
| 1145 | |
| 1146 | if ((ifa = dn_dev_alloc_ifa()) == NULL) |
| 1147 | return; |
| 1148 | |
| 1149 | ifa->ifa_local = ifa->ifa_address = addr; |
| 1150 | ifa->ifa_flags = 0; |
| 1151 | ifa->ifa_scope = RT_SCOPE_UNIVERSE; |
| 1152 | strcpy(ifa->ifa_label, dev->name); |
| 1153 | |
| 1154 | dn_dev_set_ifa(dev, ifa); |
| 1155 | |
| 1156 | /* |
| 1157 | * Automagically set the default device to the first automatically |
| 1158 | * configured ethernet card in the system. |
| 1159 | */ |
| 1160 | if (maybe_default) { |
| 1161 | dev_hold(dev); |
| 1162 | if (dn_dev_set_default(dev, 0)) |
| 1163 | dev_put(dev); |
| 1164 | } |
| 1165 | } |
| 1166 | |
| 1167 | static void dn_dev_delete(struct net_device *dev) |
| 1168 | { |
| 1169 | struct dn_dev *dn_db = dev->dn_ptr; |
| 1170 | |
| 1171 | if (dn_db == NULL) |
| 1172 | return; |
| 1173 | |
| 1174 | del_timer_sync(&dn_db->timer); |
| 1175 | dn_dev_sysctl_unregister(&dn_db->parms); |
| 1176 | dn_dev_check_default(dev); |
| 1177 | neigh_ifdown(&dn_neigh_table, dev); |
| 1178 | |
| 1179 | if (dn_db->parms.down) |
| 1180 | dn_db->parms.down(dev); |
| 1181 | |
| 1182 | dev->dn_ptr = NULL; |
| 1183 | |
| 1184 | neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms); |
| 1185 | neigh_ifdown(&dn_neigh_table, dev); |
| 1186 | |
| 1187 | if (dn_db->router) |
| 1188 | neigh_release(dn_db->router); |
| 1189 | if (dn_db->peer) |
| 1190 | neigh_release(dn_db->peer); |
| 1191 | |
| 1192 | kfree(dn_db); |
| 1193 | } |
| 1194 | |
| 1195 | void dn_dev_down(struct net_device *dev) |
| 1196 | { |
| 1197 | struct dn_dev *dn_db = dev->dn_ptr; |
| 1198 | struct dn_ifaddr *ifa; |
| 1199 | |
| 1200 | if (dn_db == NULL) |
| 1201 | return; |
| 1202 | |
| 1203 | while((ifa = dn_db->ifa_list) != NULL) { |
| 1204 | dn_dev_del_ifa(dn_db, &dn_db->ifa_list, 0); |
| 1205 | dn_dev_free_ifa(ifa); |
| 1206 | } |
| 1207 | |
| 1208 | dn_dev_delete(dev); |
| 1209 | } |
| 1210 | |
| 1211 | void dn_dev_init_pkt(struct sk_buff *skb) |
| 1212 | { |
| 1213 | return; |
| 1214 | } |
| 1215 | |
| 1216 | void dn_dev_veri_pkt(struct sk_buff *skb) |
| 1217 | { |
| 1218 | return; |
| 1219 | } |
| 1220 | |
| 1221 | void dn_dev_hello(struct sk_buff *skb) |
| 1222 | { |
| 1223 | return; |
| 1224 | } |
| 1225 | |
| 1226 | void dn_dev_devices_off(void) |
| 1227 | { |
| 1228 | struct net_device *dev; |
| 1229 | |
| 1230 | rtnl_lock(); |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 1231 | for_each_netdev(&init_net, dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1232 | dn_dev_down(dev); |
| 1233 | rtnl_unlock(); |
| 1234 | |
| 1235 | } |
| 1236 | |
| 1237 | void dn_dev_devices_on(void) |
| 1238 | { |
| 1239 | struct net_device *dev; |
| 1240 | |
| 1241 | rtnl_lock(); |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 1242 | for_each_netdev(&init_net, dev) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1243 | if (dev->flags & IFF_UP) |
| 1244 | dn_dev_up(dev); |
| 1245 | } |
| 1246 | rtnl_unlock(); |
| 1247 | } |
| 1248 | |
| 1249 | int register_dnaddr_notifier(struct notifier_block *nb) |
| 1250 | { |
Alan Stern | e041c68 | 2006-03-27 01:16:30 -0800 | [diff] [blame] | 1251 | return blocking_notifier_chain_register(&dnaddr_chain, nb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1252 | } |
| 1253 | |
| 1254 | int unregister_dnaddr_notifier(struct notifier_block *nb) |
| 1255 | { |
Alan Stern | e041c68 | 2006-03-27 01:16:30 -0800 | [diff] [blame] | 1256 | return blocking_notifier_chain_unregister(&dnaddr_chain, nb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1257 | } |
| 1258 | |
| 1259 | #ifdef CONFIG_PROC_FS |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 1260 | static inline int is_dn_dev(struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1261 | { |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 1262 | return dev->dn_ptr != NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1263 | } |
| 1264 | |
| 1265 | static void *dn_dev_seq_start(struct seq_file *seq, loff_t *pos) |
Hannes Eder | 8521c27 | 2009-02-25 10:32:25 +0000 | [diff] [blame] | 1266 | __acquires(&dev_base_lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1267 | { |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 1268 | int i; |
| 1269 | struct net_device *dev; |
| 1270 | |
| 1271 | read_lock(&dev_base_lock); |
| 1272 | |
| 1273 | if (*pos == 0) |
| 1274 | return SEQ_START_TOKEN; |
| 1275 | |
| 1276 | i = 1; |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 1277 | for_each_netdev(&init_net, dev) { |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 1278 | if (!is_dn_dev(dev)) |
| 1279 | continue; |
| 1280 | |
| 1281 | if (i++ == *pos) |
| 1282 | return dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1283 | } |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 1284 | |
| 1285 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1286 | } |
| 1287 | |
| 1288 | static void *dn_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
| 1289 | { |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 1290 | struct net_device *dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1291 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1292 | ++*pos; |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 1293 | |
| 1294 | dev = (struct net_device *)v; |
| 1295 | if (v == SEQ_START_TOKEN) |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 1296 | dev = net_device_entry(&init_net.dev_base_head); |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 1297 | |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 1298 | for_each_netdev_continue(&init_net, dev) { |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 1299 | if (!is_dn_dev(dev)) |
| 1300 | continue; |
| 1301 | |
| 1302 | return dev; |
| 1303 | } |
| 1304 | |
| 1305 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1306 | } |
| 1307 | |
| 1308 | static void dn_dev_seq_stop(struct seq_file *seq, void *v) |
Hannes Eder | 8521c27 | 2009-02-25 10:32:25 +0000 | [diff] [blame] | 1309 | __releases(&dev_base_lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1310 | { |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 1311 | read_unlock(&dev_base_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1312 | } |
| 1313 | |
| 1314 | static char *dn_type2asc(char type) |
| 1315 | { |
| 1316 | switch(type) { |
| 1317 | case DN_DEV_BCAST: |
| 1318 | return "B"; |
| 1319 | case DN_DEV_UCAST: |
| 1320 | return "U"; |
| 1321 | case DN_DEV_MPOINT: |
| 1322 | return "M"; |
| 1323 | } |
| 1324 | |
| 1325 | return "?"; |
| 1326 | } |
| 1327 | |
| 1328 | static int dn_dev_seq_show(struct seq_file *seq, void *v) |
| 1329 | { |
| 1330 | if (v == SEQ_START_TOKEN) |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 1331 | seq_puts(seq, "Name Flags T1 Timer1 T3 Timer3 BlkSize Pri State DevType Router Peer\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1332 | else { |
| 1333 | struct net_device *dev = v; |
| 1334 | char peer_buf[DN_ASCBUF_LEN]; |
| 1335 | char router_buf[DN_ASCBUF_LEN]; |
| 1336 | struct dn_dev *dn_db = dev->dn_ptr; |
| 1337 | |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 1338 | seq_printf(seq, "%-8s %1s %04u %04u %04lu %04lu" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1339 | " %04hu %03d %02x %-10s %-7s %-7s\n", |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 1340 | dev->name ? dev->name : "???", |
| 1341 | dn_type2asc(dn_db->parms.mode), |
| 1342 | 0, 0, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1343 | dn_db->t3, dn_db->parms.t3, |
| 1344 | mtu2blksize(dev), |
| 1345 | dn_db->parms.priority, |
| 1346 | dn_db->parms.state, dn_db->parms.name, |
Harvey Harrison | c4106aa | 2008-11-27 00:12:47 -0800 | [diff] [blame] | 1347 | dn_db->router ? dn_addr2asc(le16_to_cpu(*(__le16 *)dn_db->router->primary_key), router_buf) : "", |
| 1348 | dn_db->peer ? dn_addr2asc(le16_to_cpu(*(__le16 *)dn_db->peer->primary_key), peer_buf) : ""); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1349 | } |
| 1350 | return 0; |
| 1351 | } |
| 1352 | |
Philippe De Muyter | 56b3d97 | 2007-07-10 23:07:31 -0700 | [diff] [blame] | 1353 | static const struct seq_operations dn_dev_seq_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1354 | .start = dn_dev_seq_start, |
| 1355 | .next = dn_dev_seq_next, |
| 1356 | .stop = dn_dev_seq_stop, |
| 1357 | .show = dn_dev_seq_show, |
| 1358 | }; |
| 1359 | |
| 1360 | static int dn_dev_seq_open(struct inode *inode, struct file *file) |
| 1361 | { |
| 1362 | return seq_open(file, &dn_dev_seq_ops); |
| 1363 | } |
| 1364 | |
Arjan van de Ven | 9a32144 | 2007-02-12 00:55:35 -0800 | [diff] [blame] | 1365 | static const struct file_operations dn_dev_seq_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1366 | .owner = THIS_MODULE, |
| 1367 | .open = dn_dev_seq_open, |
| 1368 | .read = seq_read, |
| 1369 | .llseek = seq_lseek, |
| 1370 | .release = seq_release, |
| 1371 | }; |
| 1372 | |
| 1373 | #endif /* CONFIG_PROC_FS */ |
| 1374 | |
Alexey Dobriyan | 4e05806 | 2007-11-05 21:30:11 -0800 | [diff] [blame] | 1375 | static int addr[2]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1376 | module_param_array(addr, int, NULL, 0444); |
| 1377 | MODULE_PARM_DESC(addr, "The DECnet address of this machine: area,node"); |
| 1378 | |
| 1379 | void __init dn_dev_init(void) |
| 1380 | { |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 1381 | if (addr[0] > 63 || addr[0] < 0) { |
| 1382 | printk(KERN_ERR "DECnet: Area must be between 0 and 63"); |
| 1383 | return; |
| 1384 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1385 | |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 1386 | if (addr[1] > 1023 || addr[1] < 0) { |
| 1387 | printk(KERN_ERR "DECnet: Node must be between 0 and 1023"); |
| 1388 | return; |
| 1389 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1390 | |
Harvey Harrison | c4106aa | 2008-11-27 00:12:47 -0800 | [diff] [blame] | 1391 | decnet_address = cpu_to_le16((addr[0] << 10) | addr[1]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1392 | |
| 1393 | dn_dev_devices_on(); |
| 1394 | |
Thomas Graf | fa34ddd | 2007-03-22 11:57:46 -0700 | [diff] [blame] | 1395 | rtnl_register(PF_DECnet, RTM_NEWADDR, dn_nl_newaddr, NULL); |
| 1396 | rtnl_register(PF_DECnet, RTM_DELADDR, dn_nl_deladdr, NULL); |
| 1397 | rtnl_register(PF_DECnet, RTM_GETADDR, NULL, dn_nl_dump_ifaddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1398 | |
Eric W. Biederman | 457c4cb | 2007-09-12 12:01:34 +0200 | [diff] [blame] | 1399 | proc_net_fops_create(&init_net, "decnet_dev", S_IRUGO, &dn_dev_seq_fops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1400 | |
| 1401 | #ifdef CONFIG_SYSCTL |
| 1402 | { |
| 1403 | int i; |
| 1404 | for(i = 0; i < DN_DEV_LIST_SIZE; i++) |
| 1405 | dn_dev_sysctl_register(NULL, &dn_dev_list[i]); |
| 1406 | } |
| 1407 | #endif /* CONFIG_SYSCTL */ |
| 1408 | } |
| 1409 | |
| 1410 | void __exit dn_dev_cleanup(void) |
| 1411 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1412 | #ifdef CONFIG_SYSCTL |
| 1413 | { |
| 1414 | int i; |
| 1415 | for(i = 0; i < DN_DEV_LIST_SIZE; i++) |
| 1416 | dn_dev_sysctl_unregister(&dn_dev_list[i]); |
| 1417 | } |
| 1418 | #endif /* CONFIG_SYSCTL */ |
| 1419 | |
Eric W. Biederman | 457c4cb | 2007-09-12 12:01:34 +0200 | [diff] [blame] | 1420 | proc_net_remove(&init_net, "decnet_dev"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1421 | |
| 1422 | dn_dev_devices_off(); |
| 1423 | } |