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> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 43 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | #include <asm/uaccess.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 | |
stephen hemminger | e5c140a | 2009-11-11 07:40:36 +0000 | [diff] [blame] | 71 | static DEFINE_SPINLOCK(dndev_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Eric Dumazet | fc766e4c | 2010-10-29 03:09:24 +0000 | [diff] [blame] | 269 | dn_db = rcu_dereference_raw(dev->dn_ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Eric Dumazet | fc766e4c | 2010-10-29 03:09:24 +0000 | [diff] [blame] | 334 | static void dn_dev_free_ifa(struct dn_ifaddr *ifa) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 335 | { |
Lai Jiangshan | 1e54775 | 2011-03-15 18:10:12 +0800 | [diff] [blame] | 336 | kfree_rcu(ifa, rcu); |
Eric Dumazet | fc766e4c | 2010-10-29 03:09:24 +0000 | [diff] [blame] | 337 | } |
| 338 | |
| 339 | static void dn_dev_del_ifa(struct dn_dev *dn_db, struct dn_ifaddr __rcu **ifap, int destroy) |
| 340 | { |
| 341 | struct dn_ifaddr *ifa1 = rtnl_dereference(*ifap); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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); |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 352 | dev_mc_del(dev, mac_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 */ |
Eric Dumazet | fc766e4c | 2010-10-29 03:09:24 +0000 | [diff] [blame] | 375 | for (ifa1 = rtnl_dereference(dn_db->ifa_list); |
| 376 | ifa1 != NULL; |
| 377 | ifa1 = rtnl_dereference(ifa1->ifa_next)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | if (ifa1->ifa_local == ifa->ifa_local) |
| 379 | return -EEXIST; |
| 380 | } |
| 381 | |
| 382 | if (dev->type == ARPHRD_ETHER) { |
Steven Whitehouse | c4ea94a | 2006-03-20 22:42:39 -0800 | [diff] [blame] | 383 | if (ifa->ifa_local != dn_eth2dn(dev->dev_addr)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | dn_dn2eth(mac_addr, ifa->ifa_local); |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 385 | dev_mc_add(dev, mac_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | } |
| 387 | } |
| 388 | |
| 389 | ifa->ifa_next = dn_db->ifa_list; |
Eric Dumazet | cf778b0 | 2012-01-12 04:41:32 +0000 | [diff] [blame] | 390 | rcu_assign_pointer(dn_db->ifa_list, ifa); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 391 | |
Thomas Graf | b020b94 | 2006-11-24 17:14:31 -0800 | [diff] [blame] | 392 | dn_ifaddr_notify(RTM_NEWADDR, ifa); |
Alan Stern | e041c68 | 2006-03-27 01:16:30 -0800 | [diff] [blame] | 393 | blocking_notifier_call_chain(&dnaddr_chain, NETDEV_UP, ifa); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | |
| 395 | return 0; |
| 396 | } |
| 397 | |
| 398 | static int dn_dev_set_ifa(struct net_device *dev, struct dn_ifaddr *ifa) |
| 399 | { |
Eric Dumazet | fc766e4c | 2010-10-29 03:09:24 +0000 | [diff] [blame] | 400 | struct dn_dev *dn_db = rtnl_dereference(dev->dn_ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | int rv; |
| 402 | |
| 403 | if (dn_db == NULL) { |
| 404 | int err; |
| 405 | dn_db = dn_dev_create(dev, &err); |
| 406 | if (dn_db == NULL) |
| 407 | return err; |
| 408 | } |
| 409 | |
| 410 | ifa->ifa_dev = dn_db; |
| 411 | |
| 412 | if (dev->flags & IFF_LOOPBACK) |
| 413 | ifa->ifa_scope = RT_SCOPE_HOST; |
| 414 | |
| 415 | rv = dn_dev_insert_ifa(dn_db, ifa); |
| 416 | if (rv) |
| 417 | dn_dev_free_ifa(ifa); |
| 418 | return rv; |
| 419 | } |
| 420 | |
| 421 | |
| 422 | int dn_dev_ioctl(unsigned int cmd, void __user *arg) |
| 423 | { |
| 424 | char buffer[DN_IFREQ_SIZE]; |
| 425 | struct ifreq *ifr = (struct ifreq *)buffer; |
| 426 | struct sockaddr_dn *sdn = (struct sockaddr_dn *)&ifr->ifr_addr; |
| 427 | struct dn_dev *dn_db; |
| 428 | struct net_device *dev; |
Eric Dumazet | fc766e4c | 2010-10-29 03:09:24 +0000 | [diff] [blame] | 429 | struct dn_ifaddr *ifa = NULL; |
| 430 | struct dn_ifaddr __rcu **ifap = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | int ret = 0; |
| 432 | |
| 433 | if (copy_from_user(ifr, arg, DN_IFREQ_SIZE)) |
| 434 | return -EFAULT; |
| 435 | ifr->ifr_name[IFNAMSIZ-1] = 0; |
| 436 | |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 437 | dev_load(&init_net, ifr->ifr_name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 438 | |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 439 | switch (cmd) { |
| 440 | case SIOCGIFADDR: |
| 441 | break; |
| 442 | case SIOCSIFADDR: |
| 443 | if (!capable(CAP_NET_ADMIN)) |
| 444 | return -EACCES; |
| 445 | if (sdn->sdn_family != AF_DECnet) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 446 | return -EINVAL; |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 447 | break; |
| 448 | default: |
| 449 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | } |
| 451 | |
| 452 | rtnl_lock(); |
| 453 | |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 454 | if ((dev = __dev_get_by_name(&init_net, ifr->ifr_name)) == NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 455 | ret = -ENODEV; |
| 456 | goto done; |
| 457 | } |
| 458 | |
Eric Dumazet | fc766e4c | 2010-10-29 03:09:24 +0000 | [diff] [blame] | 459 | if ((dn_db = rtnl_dereference(dev->dn_ptr)) != NULL) { |
| 460 | for (ifap = &dn_db->ifa_list; |
| 461 | (ifa = rtnl_dereference(*ifap)) != NULL; |
| 462 | ifap = &ifa->ifa_next) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 463 | if (strcmp(ifr->ifr_name, ifa->ifa_label) == 0) |
| 464 | break; |
| 465 | } |
| 466 | |
| 467 | if (ifa == NULL && cmd != SIOCSIFADDR) { |
| 468 | ret = -EADDRNOTAVAIL; |
| 469 | goto done; |
| 470 | } |
| 471 | |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 472 | switch (cmd) { |
| 473 | case SIOCGIFADDR: |
| 474 | *((__le16 *)sdn->sdn_nodeaddr) = ifa->ifa_local; |
| 475 | goto rarok; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 476 | |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 477 | case SIOCSIFADDR: |
| 478 | if (!ifa) { |
| 479 | if ((ifa = dn_dev_alloc_ifa()) == NULL) { |
| 480 | ret = -ENOBUFS; |
| 481 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | } |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 483 | memcpy(ifa->ifa_label, dev->name, IFNAMSIZ); |
| 484 | } else { |
| 485 | if (ifa->ifa_local == dn_saddr2dn(sdn)) |
| 486 | break; |
| 487 | dn_dev_del_ifa(dn_db, ifap, 0); |
| 488 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 489 | |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 490 | ifa->ifa_local = ifa->ifa_address = dn_saddr2dn(sdn); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 491 | |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 492 | ret = dn_dev_set_ifa(dev, ifa); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 493 | } |
| 494 | done: |
| 495 | rtnl_unlock(); |
| 496 | |
| 497 | return ret; |
| 498 | rarok: |
| 499 | if (copy_to_user(arg, ifr, DN_IFREQ_SIZE)) |
| 500 | ret = -EFAULT; |
| 501 | goto done; |
| 502 | } |
| 503 | |
| 504 | struct net_device *dn_dev_get_default(void) |
| 505 | { |
| 506 | struct net_device *dev; |
stephen hemminger | e5c140a | 2009-11-11 07:40:36 +0000 | [diff] [blame] | 507 | |
| 508 | spin_lock(&dndev_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 509 | dev = decnet_default_device; |
| 510 | if (dev) { |
| 511 | if (dev->dn_ptr) |
| 512 | dev_hold(dev); |
| 513 | else |
| 514 | dev = NULL; |
| 515 | } |
stephen hemminger | e5c140a | 2009-11-11 07:40:36 +0000 | [diff] [blame] | 516 | spin_unlock(&dndev_lock); |
| 517 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 518 | return dev; |
| 519 | } |
| 520 | |
| 521 | int dn_dev_set_default(struct net_device *dev, int force) |
| 522 | { |
| 523 | struct net_device *old = NULL; |
| 524 | int rv = -EBUSY; |
| 525 | if (!dev->dn_ptr) |
| 526 | return -ENODEV; |
stephen hemminger | e5c140a | 2009-11-11 07:40:36 +0000 | [diff] [blame] | 527 | |
| 528 | spin_lock(&dndev_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | if (force || decnet_default_device == NULL) { |
| 530 | old = decnet_default_device; |
| 531 | decnet_default_device = dev; |
| 532 | rv = 0; |
| 533 | } |
stephen hemminger | e5c140a | 2009-11-11 07:40:36 +0000 | [diff] [blame] | 534 | spin_unlock(&dndev_lock); |
| 535 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | if (old) |
Patrick Caulfield | 6a57b2e | 2006-03-29 13:57:31 -0800 | [diff] [blame] | 537 | dev_put(old); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 538 | return rv; |
| 539 | } |
| 540 | |
| 541 | static void dn_dev_check_default(struct net_device *dev) |
| 542 | { |
stephen hemminger | e5c140a | 2009-11-11 07:40:36 +0000 | [diff] [blame] | 543 | spin_lock(&dndev_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 544 | if (dev == decnet_default_device) { |
| 545 | decnet_default_device = NULL; |
| 546 | } else { |
| 547 | dev = NULL; |
| 548 | } |
stephen hemminger | e5c140a | 2009-11-11 07:40:36 +0000 | [diff] [blame] | 549 | spin_unlock(&dndev_lock); |
| 550 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 551 | if (dev) |
| 552 | dev_put(dev); |
| 553 | } |
| 554 | |
Eric Dumazet | b4d745d | 2009-11-04 10:59:38 -0800 | [diff] [blame] | 555 | /* |
| 556 | * Called with RTNL |
| 557 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | static struct dn_dev *dn_dev_by_index(int ifindex) |
| 559 | { |
| 560 | struct net_device *dev; |
| 561 | struct dn_dev *dn_dev = NULL; |
Eric Dumazet | b4d745d | 2009-11-04 10:59:38 -0800 | [diff] [blame] | 562 | |
| 563 | dev = __dev_get_by_index(&init_net, ifindex); |
| 564 | if (dev) |
Eric Dumazet | fc766e4c | 2010-10-29 03:09:24 +0000 | [diff] [blame] | 565 | dn_dev = rtnl_dereference(dev->dn_ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 566 | |
| 567 | return dn_dev; |
| 568 | } |
| 569 | |
Patrick McHardy | ef7c79e | 2007-06-05 12:38:30 -0700 | [diff] [blame] | 570 | static const struct nla_policy dn_ifa_policy[IFA_MAX+1] = { |
Thomas Graf | 4a89c25 | 2006-11-24 17:14:51 -0800 | [diff] [blame] | 571 | [IFA_ADDRESS] = { .type = NLA_U16 }, |
| 572 | [IFA_LOCAL] = { .type = NLA_U16 }, |
| 573 | [IFA_LABEL] = { .type = NLA_STRING, |
| 574 | .len = IFNAMSIZ - 1 }, |
| 575 | }; |
| 576 | |
| 577 | 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] | 578 | { |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 579 | struct net *net = sock_net(skb->sk); |
Thomas Graf | 4a89c25 | 2006-11-24 17:14:51 -0800 | [diff] [blame] | 580 | struct nlattr *tb[IFA_MAX+1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 581 | struct dn_dev *dn_db; |
Thomas Graf | 4a89c25 | 2006-11-24 17:14:51 -0800 | [diff] [blame] | 582 | struct ifaddrmsg *ifm; |
Eric Dumazet | fc766e4c | 2010-10-29 03:09:24 +0000 | [diff] [blame] | 583 | struct dn_ifaddr *ifa; |
| 584 | struct dn_ifaddr __rcu **ifap; |
Denis V. Lunev | b854272 | 2007-12-01 00:21:31 +1100 | [diff] [blame] | 585 | int err = -EINVAL; |
| 586 | |
Octavian Purdila | 09ad9bc | 2009-11-25 15:14:13 -0800 | [diff] [blame] | 587 | if (!net_eq(net, &init_net)) |
Denis V. Lunev | b854272 | 2007-12-01 00:21:31 +1100 | [diff] [blame] | 588 | goto errout; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 589 | |
Thomas Graf | 4a89c25 | 2006-11-24 17:14:51 -0800 | [diff] [blame] | 590 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, dn_ifa_policy); |
| 591 | if (err < 0) |
| 592 | goto errout; |
| 593 | |
Pavel Emelyanov | 3ccd862 | 2007-11-30 23:43:31 +1100 | [diff] [blame] | 594 | err = -ENODEV; |
Thomas Graf | 4a89c25 | 2006-11-24 17:14:51 -0800 | [diff] [blame] | 595 | ifm = nlmsg_data(nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 596 | if ((dn_db = dn_dev_by_index(ifm->ifa_index)) == NULL) |
Thomas Graf | 4a89c25 | 2006-11-24 17:14:51 -0800 | [diff] [blame] | 597 | goto errout; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 598 | |
Pavel Emelyanov | 3ccd862 | 2007-11-30 23:43:31 +1100 | [diff] [blame] | 599 | err = -EADDRNOTAVAIL; |
Eric Dumazet | fc766e4c | 2010-10-29 03:09:24 +0000 | [diff] [blame] | 600 | for (ifap = &dn_db->ifa_list; |
| 601 | (ifa = rtnl_dereference(*ifap)) != NULL; |
| 602 | ifap = &ifa->ifa_next) { |
Thomas Graf | 4a89c25 | 2006-11-24 17:14:51 -0800 | [diff] [blame] | 603 | if (tb[IFA_LOCAL] && |
| 604 | nla_memcmp(tb[IFA_LOCAL], &ifa->ifa_local, 2)) |
| 605 | continue; |
| 606 | |
| 607 | if (tb[IFA_LABEL] && nla_strcmp(tb[IFA_LABEL], ifa->ifa_label)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 608 | continue; |
| 609 | |
| 610 | dn_dev_del_ifa(dn_db, ifap, 1); |
| 611 | return 0; |
| 612 | } |
| 613 | |
Thomas Graf | 4a89c25 | 2006-11-24 17:14:51 -0800 | [diff] [blame] | 614 | errout: |
| 615 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 616 | } |
| 617 | |
Thomas Graf | 4a89c25 | 2006-11-24 17:14:51 -0800 | [diff] [blame] | 618 | 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] | 619 | { |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 620 | struct net *net = sock_net(skb->sk); |
Thomas Graf | 4a89c25 | 2006-11-24 17:14:51 -0800 | [diff] [blame] | 621 | struct nlattr *tb[IFA_MAX+1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 622 | struct net_device *dev; |
| 623 | struct dn_dev *dn_db; |
Thomas Graf | 4a89c25 | 2006-11-24 17:14:51 -0800 | [diff] [blame] | 624 | struct ifaddrmsg *ifm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 625 | struct dn_ifaddr *ifa; |
Thomas Graf | 4a89c25 | 2006-11-24 17:14:51 -0800 | [diff] [blame] | 626 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 627 | |
Octavian Purdila | 09ad9bc | 2009-11-25 15:14:13 -0800 | [diff] [blame] | 628 | if (!net_eq(net, &init_net)) |
Denis V. Lunev | b854272 | 2007-12-01 00:21:31 +1100 | [diff] [blame] | 629 | return -EINVAL; |
| 630 | |
Thomas Graf | 4a89c25 | 2006-11-24 17:14:51 -0800 | [diff] [blame] | 631 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, dn_ifa_policy); |
| 632 | if (err < 0) |
| 633 | return err; |
| 634 | |
| 635 | if (tb[IFA_LOCAL] == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 636 | return -EINVAL; |
| 637 | |
Thomas Graf | 4a89c25 | 2006-11-24 17:14:51 -0800 | [diff] [blame] | 638 | ifm = nlmsg_data(nlh); |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 639 | if ((dev = __dev_get_by_index(&init_net, ifm->ifa_index)) == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 640 | return -ENODEV; |
| 641 | |
Eric Dumazet | fc766e4c | 2010-10-29 03:09:24 +0000 | [diff] [blame] | 642 | if ((dn_db = rtnl_dereference(dev->dn_ptr)) == NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 643 | dn_db = dn_dev_create(dev, &err); |
| 644 | if (!dn_db) |
| 645 | return err; |
| 646 | } |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 647 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 648 | if ((ifa = dn_dev_alloc_ifa()) == NULL) |
| 649 | return -ENOBUFS; |
| 650 | |
Thomas Graf | 4a89c25 | 2006-11-24 17:14:51 -0800 | [diff] [blame] | 651 | if (tb[IFA_ADDRESS] == NULL) |
| 652 | tb[IFA_ADDRESS] = tb[IFA_LOCAL]; |
| 653 | |
| 654 | ifa->ifa_local = nla_get_le16(tb[IFA_LOCAL]); |
| 655 | ifa->ifa_address = nla_get_le16(tb[IFA_ADDRESS]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 656 | ifa->ifa_flags = ifm->ifa_flags; |
| 657 | ifa->ifa_scope = ifm->ifa_scope; |
| 658 | ifa->ifa_dev = dn_db; |
Thomas Graf | 4a89c25 | 2006-11-24 17:14:51 -0800 | [diff] [blame] | 659 | |
| 660 | if (tb[IFA_LABEL]) |
| 661 | nla_strlcpy(ifa->ifa_label, tb[IFA_LABEL], IFNAMSIZ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 662 | else |
| 663 | memcpy(ifa->ifa_label, dev->name, IFNAMSIZ); |
| 664 | |
Thomas Graf | 4a89c25 | 2006-11-24 17:14:51 -0800 | [diff] [blame] | 665 | err = dn_dev_insert_ifa(dn_db, ifa); |
| 666 | if (err) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 667 | dn_dev_free_ifa(ifa); |
Thomas Graf | 4a89c25 | 2006-11-24 17:14:51 -0800 | [diff] [blame] | 668 | |
| 669 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 670 | } |
| 671 | |
Thomas Graf | a6f01ca | 2006-11-24 17:14:07 -0800 | [diff] [blame] | 672 | static inline size_t dn_ifaddr_nlmsg_size(void) |
| 673 | { |
| 674 | return NLMSG_ALIGN(sizeof(struct ifaddrmsg)) |
| 675 | + nla_total_size(IFNAMSIZ) /* IFA_LABEL */ |
| 676 | + nla_total_size(2) /* IFA_ADDRESS */ |
| 677 | + nla_total_size(2); /* IFA_LOCAL */ |
| 678 | } |
| 679 | |
Thomas Graf | 4a89c25 | 2006-11-24 17:14:51 -0800 | [diff] [blame] | 680 | static int dn_nl_fill_ifaddr(struct sk_buff *skb, struct dn_ifaddr *ifa, |
| 681 | u32 pid, u32 seq, int event, unsigned int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 682 | { |
| 683 | struct ifaddrmsg *ifm; |
| 684 | struct nlmsghdr *nlh; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 685 | |
Thomas Graf | 4a89c25 | 2006-11-24 17:14:51 -0800 | [diff] [blame] | 686 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*ifm), flags); |
| 687 | if (nlh == NULL) |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 688 | return -EMSGSIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 689 | |
Thomas Graf | 4a89c25 | 2006-11-24 17:14:51 -0800 | [diff] [blame] | 690 | ifm = nlmsg_data(nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 691 | ifm->ifa_family = AF_DECnet; |
| 692 | ifm->ifa_prefixlen = 16; |
| 693 | ifm->ifa_flags = ifa->ifa_flags | IFA_F_PERMANENT; |
| 694 | ifm->ifa_scope = ifa->ifa_scope; |
| 695 | ifm->ifa_index = ifa->ifa_dev->dev->ifindex; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 696 | |
Thomas Graf | 4a89c25 | 2006-11-24 17:14:51 -0800 | [diff] [blame] | 697 | if (ifa->ifa_address) |
| 698 | NLA_PUT_LE16(skb, IFA_ADDRESS, ifa->ifa_address); |
| 699 | if (ifa->ifa_local) |
| 700 | NLA_PUT_LE16(skb, IFA_LOCAL, ifa->ifa_local); |
| 701 | if (ifa->ifa_label[0]) |
| 702 | NLA_PUT_STRING(skb, IFA_LABEL, ifa->ifa_label); |
| 703 | |
| 704 | return nlmsg_end(skb, nlh); |
| 705 | |
| 706 | nla_put_failure: |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 707 | nlmsg_cancel(skb, nlh); |
| 708 | return -EMSGSIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 709 | } |
| 710 | |
Thomas Graf | b020b94 | 2006-11-24 17:14:31 -0800 | [diff] [blame] | 711 | static void dn_ifaddr_notify(int event, struct dn_ifaddr *ifa) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 712 | { |
| 713 | struct sk_buff *skb; |
Thomas Graf | dc738dd | 2006-08-15 00:33:35 -0700 | [diff] [blame] | 714 | int err = -ENOBUFS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 715 | |
Thomas Graf | a6f01ca | 2006-11-24 17:14:07 -0800 | [diff] [blame] | 716 | skb = alloc_skb(dn_ifaddr_nlmsg_size(), GFP_KERNEL); |
Thomas Graf | dc738dd | 2006-08-15 00:33:35 -0700 | [diff] [blame] | 717 | if (skb == NULL) |
| 718 | goto errout; |
| 719 | |
Thomas Graf | 4a89c25 | 2006-11-24 17:14:51 -0800 | [diff] [blame] | 720 | err = dn_nl_fill_ifaddr(skb, ifa, 0, 0, event, 0); |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 721 | if (err < 0) { |
| 722 | /* -EMSGSIZE implies BUG in dn_ifaddr_nlmsg_size() */ |
| 723 | WARN_ON(err == -EMSGSIZE); |
| 724 | kfree_skb(skb); |
| 725 | goto errout; |
| 726 | } |
Pablo Neira Ayuso | 1ce85fe | 2009-02-24 23:18:28 -0800 | [diff] [blame] | 727 | rtnl_notify(skb, &init_net, 0, RTNLGRP_DECnet_IFADDR, NULL, GFP_KERNEL); |
| 728 | return; |
Thomas Graf | dc738dd | 2006-08-15 00:33:35 -0700 | [diff] [blame] | 729 | errout: |
| 730 | if (err < 0) |
Denis V. Lunev | 97c53ca | 2007-11-19 22:26:51 -0800 | [diff] [blame] | 731 | rtnl_set_sk_err(&init_net, RTNLGRP_DECnet_IFADDR, err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 732 | } |
| 733 | |
Thomas Graf | 4a89c25 | 2006-11-24 17:14:51 -0800 | [diff] [blame] | 734 | 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] | 735 | { |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 736 | struct net *net = sock_net(skb->sk); |
Thomas Graf | 4a89c25 | 2006-11-24 17:14:51 -0800 | [diff] [blame] | 737 | int idx, dn_idx = 0, skip_ndevs, skip_naddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 738 | struct net_device *dev; |
| 739 | struct dn_dev *dn_db; |
| 740 | struct dn_ifaddr *ifa; |
| 741 | |
Octavian Purdila | 09ad9bc | 2009-11-25 15:14:13 -0800 | [diff] [blame] | 742 | if (!net_eq(net, &init_net)) |
Denis V. Lunev | b854272 | 2007-12-01 00:21:31 +1100 | [diff] [blame] | 743 | return 0; |
| 744 | |
Thomas Graf | 4a89c25 | 2006-11-24 17:14:51 -0800 | [diff] [blame] | 745 | skip_ndevs = cb->args[0]; |
| 746 | skip_naddr = cb->args[1]; |
| 747 | |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 748 | idx = 0; |
Eric Dumazet | e67f88d | 2011-04-27 22:56:07 +0000 | [diff] [blame] | 749 | rcu_read_lock(); |
| 750 | for_each_netdev_rcu(&init_net, dev) { |
Thomas Graf | 4a89c25 | 2006-11-24 17:14:51 -0800 | [diff] [blame] | 751 | if (idx < skip_ndevs) |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 752 | goto cont; |
Thomas Graf | 4a89c25 | 2006-11-24 17:14:51 -0800 | [diff] [blame] | 753 | else if (idx > skip_ndevs) { |
| 754 | /* Only skip over addresses for first dev dumped |
| 755 | * in this iteration (idx == skip_ndevs) */ |
| 756 | skip_naddr = 0; |
| 757 | } |
| 758 | |
Eric Dumazet | e67f88d | 2011-04-27 22:56:07 +0000 | [diff] [blame] | 759 | if ((dn_db = rcu_dereference(dev->dn_ptr)) == NULL) |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 760 | goto cont; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 761 | |
Eric Dumazet | e67f88d | 2011-04-27 22:56:07 +0000 | [diff] [blame] | 762 | for (ifa = rcu_dereference(dn_db->ifa_list), dn_idx = 0; ifa; |
| 763 | ifa = rcu_dereference(ifa->ifa_next), dn_idx++) { |
Thomas Graf | 4a89c25 | 2006-11-24 17:14:51 -0800 | [diff] [blame] | 764 | if (dn_idx < skip_naddr) |
Patrick McHardy | a2221f3 | 2007-09-11 10:45:15 +0200 | [diff] [blame] | 765 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 766 | |
Thomas Graf | 4a89c25 | 2006-11-24 17:14:51 -0800 | [diff] [blame] | 767 | if (dn_nl_fill_ifaddr(skb, ifa, NETLINK_CB(cb->skb).pid, |
| 768 | cb->nlh->nlmsg_seq, RTM_NEWADDR, |
| 769 | NLM_F_MULTI) < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 770 | goto done; |
| 771 | } |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 772 | cont: |
| 773 | idx++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 774 | } |
| 775 | done: |
Eric Dumazet | e67f88d | 2011-04-27 22:56:07 +0000 | [diff] [blame] | 776 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 777 | cb->args[0] = idx; |
| 778 | cb->args[1] = dn_idx; |
| 779 | |
| 780 | return skb->len; |
| 781 | } |
| 782 | |
Steven Whitehouse | c4ea94a | 2006-03-20 22:42:39 -0800 | [diff] [blame] | 783 | static int dn_dev_get_first(struct net_device *dev, __le16 *addr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 784 | { |
Eric Dumazet | fc766e4c | 2010-10-29 03:09:24 +0000 | [diff] [blame] | 785 | struct dn_dev *dn_db; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 786 | struct dn_ifaddr *ifa; |
| 787 | int rv = -ENODEV; |
stephen hemminger | 41bdecf | 2009-11-11 07:39:27 +0000 | [diff] [blame] | 788 | |
Eric Dumazet | fc766e4c | 2010-10-29 03:09:24 +0000 | [diff] [blame] | 789 | rcu_read_lock(); |
| 790 | dn_db = rcu_dereference(dev->dn_ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 791 | if (dn_db == NULL) |
| 792 | goto out; |
stephen hemminger | 41bdecf | 2009-11-11 07:39:27 +0000 | [diff] [blame] | 793 | |
Eric Dumazet | fc766e4c | 2010-10-29 03:09:24 +0000 | [diff] [blame] | 794 | ifa = rcu_dereference(dn_db->ifa_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 795 | if (ifa != NULL) { |
| 796 | *addr = ifa->ifa_local; |
| 797 | rv = 0; |
| 798 | } |
| 799 | out: |
Eric Dumazet | fc766e4c | 2010-10-29 03:09:24 +0000 | [diff] [blame] | 800 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 801 | return rv; |
| 802 | } |
| 803 | |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 804 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 805 | * Find a default address to bind to. |
| 806 | * |
| 807 | * This is one of those areas where the initial VMS concepts don't really |
| 808 | * map onto the Linux concepts, and since we introduced multiple addresses |
| 809 | * per interface we have to cope with slightly odd ways of finding out what |
| 810 | * "our address" really is. Mostly it's not a problem; for this we just guess |
| 811 | * a sensible default. Eventually the routing code will take care of all the |
| 812 | * nasties for us I hope. |
| 813 | */ |
Steven Whitehouse | c4ea94a | 2006-03-20 22:42:39 -0800 | [diff] [blame] | 814 | int dn_dev_bind_default(__le16 *addr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 815 | { |
| 816 | struct net_device *dev; |
| 817 | int rv; |
| 818 | dev = dn_dev_get_default(); |
| 819 | last_chance: |
| 820 | if (dev) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 821 | rv = dn_dev_get_first(dev, addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 822 | dev_put(dev); |
Eric W. Biederman | 2774c7a | 2007-09-26 22:10:56 -0700 | [diff] [blame] | 823 | if (rv == 0 || dev == init_net.loopback_dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 824 | return rv; |
| 825 | } |
Eric W. Biederman | 2774c7a | 2007-09-26 22:10:56 -0700 | [diff] [blame] | 826 | dev = init_net.loopback_dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 827 | dev_hold(dev); |
| 828 | goto last_chance; |
| 829 | } |
| 830 | |
| 831 | static void dn_send_endnode_hello(struct net_device *dev, struct dn_ifaddr *ifa) |
| 832 | { |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 833 | struct endnode_hello_message *msg; |
| 834 | struct sk_buff *skb = NULL; |
| 835 | __le16 *pktlen; |
Eric Dumazet | fc766e4c | 2010-10-29 03:09:24 +0000 | [diff] [blame] | 836 | struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 837 | |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 838 | if ((skb = dn_alloc_skb(NULL, sizeof(*msg), GFP_ATOMIC)) == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 839 | return; |
| 840 | |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 841 | skb->dev = dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 842 | |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 843 | msg = (struct endnode_hello_message *)skb_put(skb,sizeof(*msg)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 844 | |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 845 | msg->msgflg = 0x0D; |
| 846 | memcpy(msg->tiver, dn_eco_version, 3); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 847 | dn_dn2eth(msg->id, ifa->ifa_local); |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 848 | msg->iinfo = DN_RT_INFO_ENDN; |
Harvey Harrison | c4106aa | 2008-11-27 00:12:47 -0800 | [diff] [blame] | 849 | msg->blksize = cpu_to_le16(mtu2blksize(dev)); |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 850 | msg->area = 0x00; |
| 851 | memset(msg->seed, 0, 8); |
| 852 | memcpy(msg->neighbor, dn_hiord, ETH_ALEN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 853 | |
| 854 | if (dn_db->router) { |
| 855 | struct dn_neigh *dn = (struct dn_neigh *)dn_db->router; |
| 856 | dn_dn2eth(msg->neighbor, dn->addr); |
| 857 | } |
| 858 | |
Harvey Harrison | c4106aa | 2008-11-27 00:12:47 -0800 | [diff] [blame] | 859 | msg->timer = cpu_to_le16((unsigned short)dn_db->parms.t3); |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 860 | msg->mpd = 0x00; |
| 861 | msg->datalen = 0x02; |
| 862 | memset(msg->data, 0xAA, 2); |
| 863 | |
| 864 | pktlen = (__le16 *)skb_push(skb,2); |
Harvey Harrison | c4106aa | 2008-11-27 00:12:47 -0800 | [diff] [blame] | 865 | *pktlen = cpu_to_le16(skb->len - 2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 866 | |
Arnaldo Carvalho de Melo | c1d2bbe | 2007-04-10 20:45:18 -0700 | [diff] [blame] | 867 | skb_reset_network_header(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 868 | |
| 869 | dn_rt_finish_output(skb, dn_rt_all_rt_mcast, msg->id); |
| 870 | } |
| 871 | |
| 872 | |
| 873 | #define DRDELAY (5 * HZ) |
| 874 | |
| 875 | static int dn_am_i_a_router(struct dn_neigh *dn, struct dn_dev *dn_db, struct dn_ifaddr *ifa) |
| 876 | { |
| 877 | /* First check time since device went up */ |
| 878 | if ((jiffies - dn_db->uptime) < DRDELAY) |
| 879 | return 0; |
| 880 | |
| 881 | /* If there is no router, then yes... */ |
| 882 | if (!dn_db->router) |
| 883 | return 1; |
| 884 | |
| 885 | /* otherwise only if we have a higher priority or.. */ |
| 886 | if (dn->priority < dn_db->parms.priority) |
| 887 | return 1; |
| 888 | |
| 889 | /* if we have equal priority and a higher node number */ |
| 890 | if (dn->priority != dn_db->parms.priority) |
| 891 | return 0; |
| 892 | |
Harvey Harrison | c4106aa | 2008-11-27 00:12:47 -0800 | [diff] [blame] | 893 | if (le16_to_cpu(dn->addr) < le16_to_cpu(ifa->ifa_local)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 894 | return 1; |
| 895 | |
| 896 | return 0; |
| 897 | } |
| 898 | |
| 899 | static void dn_send_router_hello(struct net_device *dev, struct dn_ifaddr *ifa) |
| 900 | { |
| 901 | int n; |
Eric Dumazet | fc766e4c | 2010-10-29 03:09:24 +0000 | [diff] [blame] | 902 | struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 903 | struct dn_neigh *dn = (struct dn_neigh *)dn_db->router; |
| 904 | struct sk_buff *skb; |
| 905 | size_t size; |
| 906 | unsigned char *ptr; |
| 907 | unsigned char *i1, *i2; |
Steven Whitehouse | c4ea94a | 2006-03-20 22:42:39 -0800 | [diff] [blame] | 908 | __le16 *pktlen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 909 | char *src; |
| 910 | |
| 911 | if (mtu2blksize(dev) < (26 + 7)) |
| 912 | return; |
| 913 | |
| 914 | n = mtu2blksize(dev) - 26; |
| 915 | n /= 7; |
| 916 | |
| 917 | if (n > 32) |
| 918 | n = 32; |
| 919 | |
| 920 | size = 2 + 26 + 7 * n; |
| 921 | |
| 922 | if ((skb = dn_alloc_skb(NULL, size, GFP_ATOMIC)) == NULL) |
| 923 | return; |
| 924 | |
| 925 | skb->dev = dev; |
| 926 | ptr = skb_put(skb, size); |
| 927 | |
| 928 | *ptr++ = DN_RT_PKT_CNTL | DN_RT_PKT_ERTH; |
| 929 | *ptr++ = 2; /* ECO */ |
| 930 | *ptr++ = 0; |
| 931 | *ptr++ = 0; |
| 932 | dn_dn2eth(ptr, ifa->ifa_local); |
| 933 | src = ptr; |
| 934 | ptr += ETH_ALEN; |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 935 | *ptr++ = dn_db->parms.forwarding == 1 ? |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 936 | DN_RT_INFO_L1RT : DN_RT_INFO_L2RT; |
Harvey Harrison | c4106aa | 2008-11-27 00:12:47 -0800 | [diff] [blame] | 937 | *((__le16 *)ptr) = cpu_to_le16(mtu2blksize(dev)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 938 | ptr += 2; |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 939 | *ptr++ = dn_db->parms.priority; /* Priority */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 940 | *ptr++ = 0; /* Area: Reserved */ |
Harvey Harrison | c4106aa | 2008-11-27 00:12:47 -0800 | [diff] [blame] | 941 | *((__le16 *)ptr) = cpu_to_le16((unsigned short)dn_db->parms.t3); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 942 | ptr += 2; |
| 943 | *ptr++ = 0; /* MPD: Reserved */ |
| 944 | i1 = ptr++; |
| 945 | memset(ptr, 0, 7); /* Name: Reserved */ |
| 946 | ptr += 7; |
| 947 | i2 = ptr++; |
| 948 | |
| 949 | n = dn_neigh_elist(dev, ptr, n); |
| 950 | |
| 951 | *i2 = 7 * n; |
| 952 | *i1 = 8 + *i2; |
| 953 | |
| 954 | skb_trim(skb, (27 + *i2)); |
| 955 | |
Steven Whitehouse | c4ea94a | 2006-03-20 22:42:39 -0800 | [diff] [blame] | 956 | pktlen = (__le16 *)skb_push(skb, 2); |
Harvey Harrison | c4106aa | 2008-11-27 00:12:47 -0800 | [diff] [blame] | 957 | *pktlen = cpu_to_le16(skb->len - 2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 958 | |
Arnaldo Carvalho de Melo | c1d2bbe | 2007-04-10 20:45:18 -0700 | [diff] [blame] | 959 | skb_reset_network_header(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 960 | |
| 961 | if (dn_am_i_a_router(dn, dn_db, ifa)) { |
| 962 | struct sk_buff *skb2 = skb_copy(skb, GFP_ATOMIC); |
| 963 | if (skb2) { |
| 964 | dn_rt_finish_output(skb2, dn_rt_all_end_mcast, src); |
| 965 | } |
| 966 | } |
| 967 | |
| 968 | dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src); |
| 969 | } |
| 970 | |
| 971 | static void dn_send_brd_hello(struct net_device *dev, struct dn_ifaddr *ifa) |
| 972 | { |
Eric Dumazet | fc766e4c | 2010-10-29 03:09:24 +0000 | [diff] [blame] | 973 | struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 974 | |
| 975 | if (dn_db->parms.forwarding == 0) |
| 976 | dn_send_endnode_hello(dev, ifa); |
| 977 | else |
| 978 | dn_send_router_hello(dev, ifa); |
| 979 | } |
| 980 | |
| 981 | static void dn_send_ptp_hello(struct net_device *dev, struct dn_ifaddr *ifa) |
| 982 | { |
| 983 | int tdlen = 16; |
| 984 | int size = dev->hard_header_len + 2 + 4 + tdlen; |
| 985 | struct sk_buff *skb = dn_alloc_skb(NULL, size, GFP_ATOMIC); |
| 986 | int i; |
| 987 | unsigned char *ptr; |
| 988 | char src[ETH_ALEN]; |
| 989 | |
| 990 | if (skb == NULL) |
| 991 | return ; |
| 992 | |
| 993 | skb->dev = dev; |
| 994 | skb_push(skb, dev->hard_header_len); |
| 995 | ptr = skb_put(skb, 2 + 4 + tdlen); |
| 996 | |
| 997 | *ptr++ = DN_RT_PKT_HELO; |
Steven Whitehouse | c4ea94a | 2006-03-20 22:42:39 -0800 | [diff] [blame] | 998 | *((__le16 *)ptr) = ifa->ifa_local; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 999 | ptr += 2; |
| 1000 | *ptr++ = tdlen; |
| 1001 | |
| 1002 | for(i = 0; i < tdlen; i++) |
| 1003 | *ptr++ = 0252; |
| 1004 | |
| 1005 | dn_dn2eth(src, ifa->ifa_local); |
| 1006 | dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src); |
| 1007 | } |
| 1008 | |
| 1009 | static int dn_eth_up(struct net_device *dev) |
| 1010 | { |
Eric Dumazet | fc766e4c | 2010-10-29 03:09:24 +0000 | [diff] [blame] | 1011 | struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1012 | |
| 1013 | if (dn_db->parms.forwarding == 0) |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 1014 | dev_mc_add(dev, dn_rt_all_end_mcast); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1015 | else |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 1016 | dev_mc_add(dev, dn_rt_all_rt_mcast); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1017 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1018 | dn_db->use_long = 1; |
| 1019 | |
| 1020 | return 0; |
| 1021 | } |
| 1022 | |
| 1023 | static void dn_eth_down(struct net_device *dev) |
| 1024 | { |
Eric Dumazet | fc766e4c | 2010-10-29 03:09:24 +0000 | [diff] [blame] | 1025 | struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1026 | |
| 1027 | if (dn_db->parms.forwarding == 0) |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 1028 | dev_mc_del(dev, dn_rt_all_end_mcast); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1029 | else |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 1030 | dev_mc_del(dev, dn_rt_all_rt_mcast); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1031 | } |
| 1032 | |
| 1033 | static void dn_dev_set_timer(struct net_device *dev); |
| 1034 | |
| 1035 | static void dn_dev_timer_func(unsigned long arg) |
| 1036 | { |
| 1037 | struct net_device *dev = (struct net_device *)arg; |
Eric Dumazet | fc766e4c | 2010-10-29 03:09:24 +0000 | [diff] [blame] | 1038 | struct dn_dev *dn_db; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1039 | struct dn_ifaddr *ifa; |
| 1040 | |
Eric Dumazet | fc766e4c | 2010-10-29 03:09:24 +0000 | [diff] [blame] | 1041 | rcu_read_lock(); |
| 1042 | dn_db = rcu_dereference(dev->dn_ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1043 | if (dn_db->t3 <= dn_db->parms.t2) { |
| 1044 | if (dn_db->parms.timer3) { |
Eric Dumazet | fc766e4c | 2010-10-29 03:09:24 +0000 | [diff] [blame] | 1045 | for (ifa = rcu_dereference(dn_db->ifa_list); |
| 1046 | ifa; |
| 1047 | ifa = rcu_dereference(ifa->ifa_next)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1048 | if (!(ifa->ifa_flags & IFA_F_SECONDARY)) |
| 1049 | dn_db->parms.timer3(dev, ifa); |
| 1050 | } |
| 1051 | } |
| 1052 | dn_db->t3 = dn_db->parms.t3; |
| 1053 | } else { |
| 1054 | dn_db->t3 -= dn_db->parms.t2; |
| 1055 | } |
Eric Dumazet | fc766e4c | 2010-10-29 03:09:24 +0000 | [diff] [blame] | 1056 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1057 | dn_dev_set_timer(dev); |
| 1058 | } |
| 1059 | |
| 1060 | static void dn_dev_set_timer(struct net_device *dev) |
| 1061 | { |
Eric Dumazet | fc766e4c | 2010-10-29 03:09:24 +0000 | [diff] [blame] | 1062 | struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1063 | |
| 1064 | if (dn_db->parms.t2 > dn_db->parms.t3) |
| 1065 | dn_db->parms.t2 = dn_db->parms.t3; |
| 1066 | |
| 1067 | dn_db->timer.data = (unsigned long)dev; |
| 1068 | dn_db->timer.function = dn_dev_timer_func; |
| 1069 | dn_db->timer.expires = jiffies + (dn_db->parms.t2 * HZ); |
| 1070 | |
| 1071 | add_timer(&dn_db->timer); |
| 1072 | } |
| 1073 | |
Roel Kluin | 5eaa65b | 2008-12-10 15:18:31 -0800 | [diff] [blame] | 1074 | 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] | 1075 | { |
| 1076 | int i; |
| 1077 | struct dn_dev_parms *p = dn_dev_list; |
| 1078 | struct dn_dev *dn_db; |
| 1079 | |
| 1080 | for(i = 0; i < DN_DEV_LIST_SIZE; i++, p++) { |
| 1081 | if (p->type == dev->type) |
| 1082 | break; |
| 1083 | } |
| 1084 | |
| 1085 | *err = -ENODEV; |
| 1086 | if (i == DN_DEV_LIST_SIZE) |
| 1087 | return NULL; |
| 1088 | |
| 1089 | *err = -ENOBUFS; |
Panagiotis Issaris | 0da974f | 2006-07-21 14:51:30 -0700 | [diff] [blame] | 1090 | if ((dn_db = kzalloc(sizeof(struct dn_dev), GFP_ATOMIC)) == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1091 | return NULL; |
| 1092 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1093 | memcpy(&dn_db->parms, p, sizeof(struct dn_dev_parms)); |
Eric Dumazet | fc766e4c | 2010-10-29 03:09:24 +0000 | [diff] [blame] | 1094 | |
Eric Dumazet | cf778b0 | 2012-01-12 04:41:32 +0000 | [diff] [blame] | 1095 | rcu_assign_pointer(dev->dn_ptr, dn_db); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1096 | dn_db->dev = dev; |
| 1097 | init_timer(&dn_db->timer); |
| 1098 | |
| 1099 | dn_db->uptime = jiffies; |
Eric W. Biederman | 95743de | 2007-01-25 15:51:51 -0800 | [diff] [blame] | 1100 | |
| 1101 | dn_db->neigh_parms = neigh_parms_alloc(dev, &dn_neigh_table); |
| 1102 | if (!dn_db->neigh_parms) { |
Stephen Hemminger | a9b3cd7 | 2011-08-01 16:19:00 +0000 | [diff] [blame] | 1103 | RCU_INIT_POINTER(dev->dn_ptr, NULL); |
Eric W. Biederman | 95743de | 2007-01-25 15:51:51 -0800 | [diff] [blame] | 1104 | kfree(dn_db); |
| 1105 | return NULL; |
| 1106 | } |
| 1107 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1108 | if (dn_db->parms.up) { |
| 1109 | if (dn_db->parms.up(dev) < 0) { |
Eric W. Biederman | 95743de | 2007-01-25 15:51:51 -0800 | [diff] [blame] | 1110 | neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1111 | dev->dn_ptr = NULL; |
| 1112 | kfree(dn_db); |
| 1113 | return NULL; |
| 1114 | } |
| 1115 | } |
| 1116 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1117 | dn_dev_sysctl_register(dev, &dn_db->parms); |
| 1118 | |
| 1119 | dn_dev_set_timer(dev); |
| 1120 | |
| 1121 | *err = 0; |
| 1122 | return dn_db; |
| 1123 | } |
| 1124 | |
| 1125 | |
| 1126 | /* |
| 1127 | * This processes a device up event. We only start up |
| 1128 | * the loopback device & ethernet devices with correct |
Uwe Kleine-König | b595076 | 2010-11-01 15:38:34 -0400 | [diff] [blame] | 1129 | * MAC addresses automatically. Others must be started |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1130 | * specifically. |
| 1131 | * |
| 1132 | * FIXME: How should we configure the loopback address ? If we could dispense |
| 1133 | * with using decnet_address here and for autobind, it will be one less thing |
| 1134 | * for users to worry about setting up. |
| 1135 | */ |
| 1136 | |
| 1137 | void dn_dev_up(struct net_device *dev) |
| 1138 | { |
| 1139 | struct dn_ifaddr *ifa; |
Steven Whitehouse | c4ea94a | 2006-03-20 22:42:39 -0800 | [diff] [blame] | 1140 | __le16 addr = decnet_address; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1141 | int maybe_default = 0; |
Eric Dumazet | fc766e4c | 2010-10-29 03:09:24 +0000 | [diff] [blame] | 1142 | struct dn_dev *dn_db = rtnl_dereference(dev->dn_ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1143 | |
| 1144 | if ((dev->type != ARPHRD_ETHER) && (dev->type != ARPHRD_LOOPBACK)) |
| 1145 | return; |
| 1146 | |
| 1147 | /* |
| 1148 | * Need to ensure that loopback device has a dn_db attached to it |
| 1149 | * to allow creation of neighbours against it, even though it might |
| 1150 | * not have a local address of its own. Might as well do the same for |
| 1151 | * all autoconfigured interfaces. |
| 1152 | */ |
| 1153 | if (dn_db == NULL) { |
| 1154 | int err; |
| 1155 | dn_db = dn_dev_create(dev, &err); |
| 1156 | if (dn_db == NULL) |
| 1157 | return; |
| 1158 | } |
| 1159 | |
| 1160 | if (dev->type == ARPHRD_ETHER) { |
| 1161 | if (memcmp(dev->dev_addr, dn_hiord, 4) != 0) |
| 1162 | return; |
Steven Whitehouse | c4ea94a | 2006-03-20 22:42:39 -0800 | [diff] [blame] | 1163 | addr = dn_eth2dn(dev->dev_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1164 | maybe_default = 1; |
| 1165 | } |
| 1166 | |
| 1167 | if (addr == 0) |
| 1168 | return; |
| 1169 | |
| 1170 | if ((ifa = dn_dev_alloc_ifa()) == NULL) |
| 1171 | return; |
| 1172 | |
| 1173 | ifa->ifa_local = ifa->ifa_address = addr; |
| 1174 | ifa->ifa_flags = 0; |
| 1175 | ifa->ifa_scope = RT_SCOPE_UNIVERSE; |
| 1176 | strcpy(ifa->ifa_label, dev->name); |
| 1177 | |
| 1178 | dn_dev_set_ifa(dev, ifa); |
| 1179 | |
| 1180 | /* |
| 1181 | * Automagically set the default device to the first automatically |
| 1182 | * configured ethernet card in the system. |
| 1183 | */ |
| 1184 | if (maybe_default) { |
| 1185 | dev_hold(dev); |
| 1186 | if (dn_dev_set_default(dev, 0)) |
| 1187 | dev_put(dev); |
| 1188 | } |
| 1189 | } |
| 1190 | |
| 1191 | static void dn_dev_delete(struct net_device *dev) |
| 1192 | { |
Eric Dumazet | fc766e4c | 2010-10-29 03:09:24 +0000 | [diff] [blame] | 1193 | struct dn_dev *dn_db = rtnl_dereference(dev->dn_ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1194 | |
| 1195 | if (dn_db == NULL) |
| 1196 | return; |
| 1197 | |
| 1198 | del_timer_sync(&dn_db->timer); |
| 1199 | dn_dev_sysctl_unregister(&dn_db->parms); |
| 1200 | dn_dev_check_default(dev); |
| 1201 | neigh_ifdown(&dn_neigh_table, dev); |
| 1202 | |
| 1203 | if (dn_db->parms.down) |
| 1204 | dn_db->parms.down(dev); |
| 1205 | |
| 1206 | dev->dn_ptr = NULL; |
| 1207 | |
| 1208 | neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms); |
| 1209 | neigh_ifdown(&dn_neigh_table, dev); |
| 1210 | |
| 1211 | if (dn_db->router) |
| 1212 | neigh_release(dn_db->router); |
| 1213 | if (dn_db->peer) |
| 1214 | neigh_release(dn_db->peer); |
| 1215 | |
| 1216 | kfree(dn_db); |
| 1217 | } |
| 1218 | |
| 1219 | void dn_dev_down(struct net_device *dev) |
| 1220 | { |
Eric Dumazet | fc766e4c | 2010-10-29 03:09:24 +0000 | [diff] [blame] | 1221 | struct dn_dev *dn_db = rtnl_dereference(dev->dn_ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1222 | struct dn_ifaddr *ifa; |
| 1223 | |
| 1224 | if (dn_db == NULL) |
| 1225 | return; |
| 1226 | |
Eric Dumazet | fc766e4c | 2010-10-29 03:09:24 +0000 | [diff] [blame] | 1227 | while ((ifa = rtnl_dereference(dn_db->ifa_list)) != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1228 | dn_dev_del_ifa(dn_db, &dn_db->ifa_list, 0); |
| 1229 | dn_dev_free_ifa(ifa); |
| 1230 | } |
| 1231 | |
| 1232 | dn_dev_delete(dev); |
| 1233 | } |
| 1234 | |
| 1235 | void dn_dev_init_pkt(struct sk_buff *skb) |
| 1236 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1237 | } |
| 1238 | |
| 1239 | void dn_dev_veri_pkt(struct sk_buff *skb) |
| 1240 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1241 | } |
| 1242 | |
| 1243 | void dn_dev_hello(struct sk_buff *skb) |
| 1244 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1245 | } |
| 1246 | |
| 1247 | void dn_dev_devices_off(void) |
| 1248 | { |
| 1249 | struct net_device *dev; |
| 1250 | |
| 1251 | rtnl_lock(); |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 1252 | for_each_netdev(&init_net, dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1253 | dn_dev_down(dev); |
| 1254 | rtnl_unlock(); |
| 1255 | |
| 1256 | } |
| 1257 | |
| 1258 | void dn_dev_devices_on(void) |
| 1259 | { |
| 1260 | struct net_device *dev; |
| 1261 | |
| 1262 | rtnl_lock(); |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 1263 | for_each_netdev(&init_net, dev) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1264 | if (dev->flags & IFF_UP) |
| 1265 | dn_dev_up(dev); |
| 1266 | } |
| 1267 | rtnl_unlock(); |
| 1268 | } |
| 1269 | |
| 1270 | int register_dnaddr_notifier(struct notifier_block *nb) |
| 1271 | { |
Alan Stern | e041c68 | 2006-03-27 01:16:30 -0800 | [diff] [blame] | 1272 | return blocking_notifier_chain_register(&dnaddr_chain, nb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1273 | } |
| 1274 | |
| 1275 | int unregister_dnaddr_notifier(struct notifier_block *nb) |
| 1276 | { |
Alan Stern | e041c68 | 2006-03-27 01:16:30 -0800 | [diff] [blame] | 1277 | return blocking_notifier_chain_unregister(&dnaddr_chain, nb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1278 | } |
| 1279 | |
| 1280 | #ifdef CONFIG_PROC_FS |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 1281 | static inline int is_dn_dev(struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1282 | { |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 1283 | return dev->dn_ptr != NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1284 | } |
| 1285 | |
| 1286 | static void *dn_dev_seq_start(struct seq_file *seq, loff_t *pos) |
Eric Dumazet | fc766e4c | 2010-10-29 03:09:24 +0000 | [diff] [blame] | 1287 | __acquires(RCU) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1288 | { |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 1289 | int i; |
| 1290 | struct net_device *dev; |
| 1291 | |
stephen hemminger | fa91860 | 2009-11-10 07:54:53 +0000 | [diff] [blame] | 1292 | rcu_read_lock(); |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 1293 | |
| 1294 | if (*pos == 0) |
| 1295 | return SEQ_START_TOKEN; |
| 1296 | |
| 1297 | i = 1; |
stephen hemminger | fa91860 | 2009-11-10 07:54:53 +0000 | [diff] [blame] | 1298 | for_each_netdev_rcu(&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 | if (i++ == *pos) |
| 1303 | return dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1304 | } |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 1305 | |
| 1306 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1307 | } |
| 1308 | |
| 1309 | static void *dn_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
| 1310 | { |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 1311 | struct net_device *dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1312 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1313 | ++*pos; |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 1314 | |
Joe Perches | ea11073 | 2011-06-13 16:21:26 +0000 | [diff] [blame] | 1315 | dev = v; |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 1316 | if (v == SEQ_START_TOKEN) |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 1317 | dev = net_device_entry(&init_net.dev_base_head); |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 1318 | |
stephen hemminger | fa91860 | 2009-11-10 07:54:53 +0000 | [diff] [blame] | 1319 | for_each_netdev_continue_rcu(&init_net, dev) { |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 1320 | if (!is_dn_dev(dev)) |
| 1321 | continue; |
| 1322 | |
| 1323 | return dev; |
| 1324 | } |
| 1325 | |
| 1326 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1327 | } |
| 1328 | |
| 1329 | static void dn_dev_seq_stop(struct seq_file *seq, void *v) |
Eric Dumazet | fc766e4c | 2010-10-29 03:09:24 +0000 | [diff] [blame] | 1330 | __releases(RCU) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1331 | { |
stephen hemminger | fa91860 | 2009-11-10 07:54:53 +0000 | [diff] [blame] | 1332 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1333 | } |
| 1334 | |
| 1335 | static char *dn_type2asc(char type) |
| 1336 | { |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 1337 | switch (type) { |
| 1338 | case DN_DEV_BCAST: |
| 1339 | return "B"; |
| 1340 | case DN_DEV_UCAST: |
| 1341 | return "U"; |
| 1342 | case DN_DEV_MPOINT: |
| 1343 | return "M"; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1344 | } |
| 1345 | |
| 1346 | return "?"; |
| 1347 | } |
| 1348 | |
| 1349 | static int dn_dev_seq_show(struct seq_file *seq, void *v) |
| 1350 | { |
| 1351 | if (v == SEQ_START_TOKEN) |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 1352 | 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] | 1353 | else { |
| 1354 | struct net_device *dev = v; |
| 1355 | char peer_buf[DN_ASCBUF_LEN]; |
| 1356 | char router_buf[DN_ASCBUF_LEN]; |
Eric Dumazet | fc766e4c | 2010-10-29 03:09:24 +0000 | [diff] [blame] | 1357 | struct dn_dev *dn_db = rcu_dereference(dev->dn_ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1358 | |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 1359 | seq_printf(seq, "%-8s %1s %04u %04u %04lu %04lu" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1360 | " %04hu %03d %02x %-10s %-7s %-7s\n", |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 1361 | dev->name ? dev->name : "???", |
| 1362 | dn_type2asc(dn_db->parms.mode), |
| 1363 | 0, 0, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1364 | dn_db->t3, dn_db->parms.t3, |
| 1365 | mtu2blksize(dev), |
| 1366 | dn_db->parms.priority, |
| 1367 | dn_db->parms.state, dn_db->parms.name, |
Harvey Harrison | c4106aa | 2008-11-27 00:12:47 -0800 | [diff] [blame] | 1368 | dn_db->router ? dn_addr2asc(le16_to_cpu(*(__le16 *)dn_db->router->primary_key), router_buf) : "", |
| 1369 | 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] | 1370 | } |
| 1371 | return 0; |
| 1372 | } |
| 1373 | |
Philippe De Muyter | 56b3d97 | 2007-07-10 23:07:31 -0700 | [diff] [blame] | 1374 | static const struct seq_operations dn_dev_seq_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1375 | .start = dn_dev_seq_start, |
| 1376 | .next = dn_dev_seq_next, |
| 1377 | .stop = dn_dev_seq_stop, |
| 1378 | .show = dn_dev_seq_show, |
| 1379 | }; |
| 1380 | |
| 1381 | static int dn_dev_seq_open(struct inode *inode, struct file *file) |
| 1382 | { |
| 1383 | return seq_open(file, &dn_dev_seq_ops); |
| 1384 | } |
| 1385 | |
Arjan van de Ven | 9a32144 | 2007-02-12 00:55:35 -0800 | [diff] [blame] | 1386 | static const struct file_operations dn_dev_seq_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1387 | .owner = THIS_MODULE, |
| 1388 | .open = dn_dev_seq_open, |
| 1389 | .read = seq_read, |
| 1390 | .llseek = seq_lseek, |
| 1391 | .release = seq_release, |
| 1392 | }; |
| 1393 | |
| 1394 | #endif /* CONFIG_PROC_FS */ |
| 1395 | |
Alexey Dobriyan | 4e05806 | 2007-11-05 21:30:11 -0800 | [diff] [blame] | 1396 | static int addr[2]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1397 | module_param_array(addr, int, NULL, 0444); |
| 1398 | MODULE_PARM_DESC(addr, "The DECnet address of this machine: area,node"); |
| 1399 | |
| 1400 | void __init dn_dev_init(void) |
| 1401 | { |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 1402 | if (addr[0] > 63 || addr[0] < 0) { |
| 1403 | printk(KERN_ERR "DECnet: Area must be between 0 and 63"); |
| 1404 | return; |
| 1405 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1406 | |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 1407 | if (addr[1] > 1023 || addr[1] < 0) { |
| 1408 | printk(KERN_ERR "DECnet: Node must be between 0 and 1023"); |
| 1409 | return; |
| 1410 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1411 | |
Harvey Harrison | c4106aa | 2008-11-27 00:12:47 -0800 | [diff] [blame] | 1412 | decnet_address = cpu_to_le16((addr[0] << 10) | addr[1]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1413 | |
| 1414 | dn_dev_devices_on(); |
| 1415 | |
Greg Rose | c7ac867 | 2011-06-10 01:27:09 +0000 | [diff] [blame] | 1416 | rtnl_register(PF_DECnet, RTM_NEWADDR, dn_nl_newaddr, NULL, NULL); |
| 1417 | rtnl_register(PF_DECnet, RTM_DELADDR, dn_nl_deladdr, NULL, NULL); |
| 1418 | rtnl_register(PF_DECnet, RTM_GETADDR, NULL, dn_nl_dump_ifaddr, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1419 | |
Eric W. Biederman | 457c4cb | 2007-09-12 12:01:34 +0200 | [diff] [blame] | 1420 | 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] | 1421 | |
| 1422 | #ifdef CONFIG_SYSCTL |
| 1423 | { |
| 1424 | int i; |
| 1425 | for(i = 0; i < DN_DEV_LIST_SIZE; i++) |
| 1426 | dn_dev_sysctl_register(NULL, &dn_dev_list[i]); |
| 1427 | } |
| 1428 | #endif /* CONFIG_SYSCTL */ |
| 1429 | } |
| 1430 | |
| 1431 | void __exit dn_dev_cleanup(void) |
| 1432 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1433 | #ifdef CONFIG_SYSCTL |
| 1434 | { |
| 1435 | int i; |
| 1436 | for(i = 0; i < DN_DEV_LIST_SIZE; i++) |
| 1437 | dn_dev_sysctl_unregister(&dn_dev_list[i]); |
| 1438 | } |
| 1439 | #endif /* CONFIG_SYSCTL */ |
| 1440 | |
Eric W. Biederman | 457c4cb | 2007-09-12 12:01:34 +0200 | [diff] [blame] | 1441 | proc_net_remove(&init_net, "decnet_dev"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1442 | |
| 1443 | dn_dev_devices_off(); |
| 1444 | } |