^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * DECnet An implementation of the DECnet protocol suite for the LINUX
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * operating system. DECnet is implemented using the BSD Socket
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * interface as the means of communication with the user level.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * DECnet Device Layer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * Authors: Steve Whitehouse <SteveW@ACM.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * Eduardo Marcelo Serrat <emserrat@geocities.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * Changes:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) * Steve Whitehouse : Devices now see incoming frames so they
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * can mark on who it came from.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) * Steve Whitehouse : Fixed bug in creating neighbours. Each neighbour
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) * can now have a device specific setup func.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) * Steve Whitehouse : Added /proc/sys/net/decnet/conf/<dev>/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) * Steve Whitehouse : Fixed bug which sometimes killed timer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) * Steve Whitehouse : Multiple ifaddr support
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) * Steve Whitehouse : SIOCGIFCONF is now a compile time option
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) * Steve Whitehouse : /proc/sys/net/decnet/conf/<sys>/forwarding
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) * Steve Whitehouse : Removed timer1 - it's a user space issue now
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) * Patrick Caulfield : Fixed router hello message format
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) * Steve Whitehouse : Got rid of constant sizes for blksize for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) * devices. All mtu based now.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include <linux/capability.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #include <linux/moduleparam.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #include <linux/net.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #include <linux/netdevice.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #include <linux/proc_fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #include <linux/seq_file.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #include <linux/timer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #include <linux/if_addr.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #include <linux/if_arp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #include <linux/if_ether.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) #include <linux/skbuff.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) #include <linux/sysctl.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) #include <linux/notifier.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) #include <linux/jiffies.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) #include <net/net_namespace.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) #include <net/neighbour.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) #include <net/dst.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) #include <net/flow.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) #include <net/fib_rules.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) #include <net/netlink.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) #include <net/dn.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) #include <net/dn_dev.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) #include <net/dn_route.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) #include <net/dn_neigh.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) #include <net/dn_fib.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) #define DN_IFREQ_SIZE (offsetof(struct ifreq, ifr_ifru) + sizeof(struct sockaddr_dn))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) static char dn_rt_all_end_mcast[ETH_ALEN] = {0xAB,0x00,0x00,0x04,0x00,0x00};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) static char dn_rt_all_rt_mcast[ETH_ALEN] = {0xAB,0x00,0x00,0x03,0x00,0x00};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) static char dn_hiord[ETH_ALEN] = {0xAA,0x00,0x04,0x00,0x00,0x00};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) static unsigned char dn_eco_version[3] = {0x02,0x00,0x00};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) extern struct neigh_table dn_neigh_table;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) * decnet_address is kept in network order.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) __le16 decnet_address = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) static DEFINE_SPINLOCK(dndev_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) static struct net_device *decnet_default_device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) static BLOCKING_NOTIFIER_HEAD(dnaddr_chain);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) static struct dn_dev *dn_dev_create(struct net_device *dev, int *err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) static void dn_dev_delete(struct net_device *dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) static void dn_ifaddr_notify(int event, struct dn_ifaddr *ifa);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) static int dn_eth_up(struct net_device *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) static void dn_eth_down(struct net_device *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) static void dn_send_brd_hello(struct net_device *dev, struct dn_ifaddr *ifa);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) static void dn_send_ptp_hello(struct net_device *dev, struct dn_ifaddr *ifa);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) static struct dn_dev_parms dn_dev_list[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) .type = ARPHRD_ETHER, /* Ethernet */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) .mode = DN_DEV_BCAST,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) .state = DN_DEV_S_RU,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) .t2 = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) .t3 = 10,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) .name = "ethernet",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) .up = dn_eth_up,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) .down = dn_eth_down,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) .timer3 = dn_send_brd_hello,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) .type = ARPHRD_IPGRE, /* DECnet tunneled over GRE in IP */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) .mode = DN_DEV_BCAST,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) .state = DN_DEV_S_RU,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) .t2 = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) .t3 = 10,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) .name = "ipgre",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) .timer3 = dn_send_brd_hello,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) #if 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) .type = ARPHRD_X25, /* Bog standard X.25 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) .mode = DN_DEV_UCAST,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) .state = DN_DEV_S_DS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) .t2 = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) .t3 = 120,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) .name = "x25",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) .timer3 = dn_send_ptp_hello,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) #if 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) .type = ARPHRD_PPP, /* DECnet over PPP */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) .mode = DN_DEV_BCAST,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) .state = DN_DEV_S_RU,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) .t2 = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) .t3 = 10,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) .name = "ppp",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) .timer3 = dn_send_brd_hello,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) .type = ARPHRD_DDCMP, /* DECnet over DDCMP */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) .mode = DN_DEV_UCAST,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) .state = DN_DEV_S_DS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) .t2 = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) .t3 = 120,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) .name = "ddcmp",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) .timer3 = dn_send_ptp_hello,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) .type = ARPHRD_LOOPBACK, /* Loopback interface - always last */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) .mode = DN_DEV_BCAST,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) .state = DN_DEV_S_RU,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) .t2 = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) .t3 = 10,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) .name = "loopback",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) .timer3 = dn_send_brd_hello,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) #define DN_DEV_LIST_SIZE ARRAY_SIZE(dn_dev_list)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) #define DN_DEV_PARMS_OFFSET(x) offsetof(struct dn_dev_parms, x)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) #ifdef CONFIG_SYSCTL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) static int min_t2[] = { 1 };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) static int max_t2[] = { 60 }; /* No max specified, but this seems sensible */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) static int min_t3[] = { 1 };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) static int max_t3[] = { 8191 }; /* Must fit in 16 bits when multiplied by BCT3MULT or T3MULT */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) static int min_priority[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) static int max_priority[] = { 127 }; /* From DECnet spec */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) static int dn_forwarding_proc(struct ctl_table *, int, void *, size_t *,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) loff_t *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) static struct dn_dev_sysctl_table {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) struct ctl_table_header *sysctl_header;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) struct ctl_table dn_dev_vars[5];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) } dn_dev_sysctl = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) .procname = "forwarding",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) .data = (void *)DN_DEV_PARMS_OFFSET(forwarding),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) .maxlen = sizeof(int),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) .mode = 0644,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) .proc_handler = dn_forwarding_proc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) .procname = "priority",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) .data = (void *)DN_DEV_PARMS_OFFSET(priority),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) .maxlen = sizeof(int),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) .mode = 0644,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) .proc_handler = proc_dointvec_minmax,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) .extra1 = &min_priority,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) .extra2 = &max_priority
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) .procname = "t2",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) .data = (void *)DN_DEV_PARMS_OFFSET(t2),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) .maxlen = sizeof(int),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) .mode = 0644,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) .proc_handler = proc_dointvec_minmax,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) .extra1 = &min_t2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) .extra2 = &max_t2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) .procname = "t3",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) .data = (void *)DN_DEV_PARMS_OFFSET(t3),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) .maxlen = sizeof(int),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) .mode = 0644,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) .proc_handler = proc_dointvec_minmax,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) .extra1 = &min_t3,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) .extra2 = &max_t3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) { }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) static void dn_dev_sysctl_register(struct net_device *dev, struct dn_dev_parms *parms)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) struct dn_dev_sysctl_table *t;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) char path[sizeof("net/decnet/conf/") + IFNAMSIZ];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) t = kmemdup(&dn_dev_sysctl, sizeof(*t), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) if (t == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) for(i = 0; i < ARRAY_SIZE(t->dn_dev_vars) - 1; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) long offset = (long)t->dn_dev_vars[i].data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) t->dn_dev_vars[i].data = ((char *)parms) + offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) snprintf(path, sizeof(path), "net/decnet/conf/%s",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) dev? dev->name : parms->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) t->dn_dev_vars[0].extra1 = (void *)dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) t->sysctl_header = register_net_sysctl(&init_net, path, t->dn_dev_vars);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) if (t->sysctl_header == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) kfree(t);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) parms->sysctl = t;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) if (parms->sysctl) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) struct dn_dev_sysctl_table *t = parms->sysctl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) parms->sysctl = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) unregister_net_sysctl_table(t->sysctl_header);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) kfree(t);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) static int dn_forwarding_proc(struct ctl_table *table, int write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) void *buffer, size_t *lenp, loff_t *ppos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) #ifdef CONFIG_DECNET_ROUTER
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) struct net_device *dev = table->extra1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) struct dn_dev *dn_db;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) int tmp, old;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) if (table->extra1 == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) dn_db = rcu_dereference_raw(dev->dn_ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) old = dn_db->parms.forwarding;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) err = proc_dointvec(table, write, buffer, lenp, ppos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) if ((err >= 0) && write) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) if (dn_db->parms.forwarding < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) dn_db->parms.forwarding = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) if (dn_db->parms.forwarding > 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) dn_db->parms.forwarding = 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) * What an ugly hack this is... its works, just. It
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) * would be nice if sysctl/proc were just that little
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) * bit more flexible so I don't have to write a special
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) * routine, or suffer hacks like this - SJW
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) tmp = dn_db->parms.forwarding;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) dn_db->parms.forwarding = old;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) if (dn_db->parms.down)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) dn_db->parms.down(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) dn_db->parms.forwarding = tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) if (dn_db->parms.up)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) dn_db->parms.up(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) #else /* CONFIG_SYSCTL */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) static void dn_dev_sysctl_register(struct net_device *dev, struct dn_dev_parms *parms)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) #endif /* CONFIG_SYSCTL */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) static inline __u16 mtu2blksize(struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) u32 blksize = dev->mtu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) if (blksize > 0xffff)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) blksize = 0xffff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) if (dev->type == ARPHRD_ETHER ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) dev->type == ARPHRD_PPP ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) dev->type == ARPHRD_IPGRE ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) dev->type == ARPHRD_LOOPBACK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) blksize -= 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) return (__u16)blksize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) static struct dn_ifaddr *dn_dev_alloc_ifa(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) struct dn_ifaddr *ifa;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) ifa = kzalloc(sizeof(*ifa), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) return ifa;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) static void dn_dev_free_ifa(struct dn_ifaddr *ifa)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) kfree_rcu(ifa, rcu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) static void dn_dev_del_ifa(struct dn_dev *dn_db, struct dn_ifaddr __rcu **ifap, int destroy)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) struct dn_ifaddr *ifa1 = rtnl_dereference(*ifap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) unsigned char mac_addr[6];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) struct net_device *dev = dn_db->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) ASSERT_RTNL();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) *ifap = ifa1->ifa_next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) if (dn_db->dev->type == ARPHRD_ETHER) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) if (ifa1->ifa_local != dn_eth2dn(dev->dev_addr)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) dn_dn2eth(mac_addr, ifa1->ifa_local);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) dev_mc_del(dev, mac_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) dn_ifaddr_notify(RTM_DELADDR, ifa1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) blocking_notifier_call_chain(&dnaddr_chain, NETDEV_DOWN, ifa1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) if (destroy) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) dn_dev_free_ifa(ifa1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) if (dn_db->ifa_list == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) dn_dev_delete(dn_db->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) static int dn_dev_insert_ifa(struct dn_dev *dn_db, struct dn_ifaddr *ifa)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) struct net_device *dev = dn_db->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) struct dn_ifaddr *ifa1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) unsigned char mac_addr[6];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) ASSERT_RTNL();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) /* Check for duplicates */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) for (ifa1 = rtnl_dereference(dn_db->ifa_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) ifa1 != NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) ifa1 = rtnl_dereference(ifa1->ifa_next)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) if (ifa1->ifa_local == ifa->ifa_local)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) return -EEXIST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) if (dev->type == ARPHRD_ETHER) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) if (ifa->ifa_local != dn_eth2dn(dev->dev_addr)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) dn_dn2eth(mac_addr, ifa->ifa_local);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) dev_mc_add(dev, mac_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) ifa->ifa_next = dn_db->ifa_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) rcu_assign_pointer(dn_db->ifa_list, ifa);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) dn_ifaddr_notify(RTM_NEWADDR, ifa);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) blocking_notifier_call_chain(&dnaddr_chain, NETDEV_UP, ifa);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) static int dn_dev_set_ifa(struct net_device *dev, struct dn_ifaddr *ifa)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) struct dn_dev *dn_db = rtnl_dereference(dev->dn_ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) int rv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) if (dn_db == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) dn_db = dn_dev_create(dev, &err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) if (dn_db == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) ifa->ifa_dev = dn_db;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) if (dev->flags & IFF_LOOPBACK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) ifa->ifa_scope = RT_SCOPE_HOST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) rv = dn_dev_insert_ifa(dn_db, ifa);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) if (rv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) dn_dev_free_ifa(ifa);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) return rv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) int dn_dev_ioctl(unsigned int cmd, void __user *arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) char buffer[DN_IFREQ_SIZE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) struct ifreq *ifr = (struct ifreq *)buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) struct sockaddr_dn *sdn = (struct sockaddr_dn *)&ifr->ifr_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) struct dn_dev *dn_db;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) struct net_device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) struct dn_ifaddr *ifa = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) struct dn_ifaddr __rcu **ifap = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) if (copy_from_user(ifr, arg, DN_IFREQ_SIZE))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) ifr->ifr_name[IFNAMSIZ-1] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) dev_load(&init_net, ifr->ifr_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) switch (cmd) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) case SIOCGIFADDR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) case SIOCSIFADDR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) if (!capable(CAP_NET_ADMIN))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) return -EACCES;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) if (sdn->sdn_family != AF_DECnet)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) rtnl_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) if ((dev = __dev_get_by_name(&init_net, ifr->ifr_name)) == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) ret = -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) if ((dn_db = rtnl_dereference(dev->dn_ptr)) != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) for (ifap = &dn_db->ifa_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) (ifa = rtnl_dereference(*ifap)) != NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) ifap = &ifa->ifa_next)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) if (strcmp(ifr->ifr_name, ifa->ifa_label) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) if (ifa == NULL && cmd != SIOCSIFADDR) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) ret = -EADDRNOTAVAIL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) switch (cmd) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) case SIOCGIFADDR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) *((__le16 *)sdn->sdn_nodeaddr) = ifa->ifa_local;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) if (copy_to_user(arg, ifr, DN_IFREQ_SIZE))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) ret = -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) case SIOCSIFADDR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) if (!ifa) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) if ((ifa = dn_dev_alloc_ifa()) == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) ret = -ENOBUFS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) memcpy(ifa->ifa_label, dev->name, IFNAMSIZ);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) if (ifa->ifa_local == dn_saddr2dn(sdn))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) dn_dev_del_ifa(dn_db, ifap, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) ifa->ifa_local = ifa->ifa_address = dn_saddr2dn(sdn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) ret = dn_dev_set_ifa(dev, ifa);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) done:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) rtnl_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) struct net_device *dn_dev_get_default(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) struct net_device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) spin_lock(&dndev_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) dev = decnet_default_device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) if (dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) if (dev->dn_ptr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) dev_hold(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) dev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) spin_unlock(&dndev_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) return dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) int dn_dev_set_default(struct net_device *dev, int force)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) struct net_device *old = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) int rv = -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) if (!dev->dn_ptr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) spin_lock(&dndev_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) if (force || decnet_default_device == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) old = decnet_default_device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) decnet_default_device = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) rv = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) spin_unlock(&dndev_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) if (old)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) dev_put(old);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) return rv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) static void dn_dev_check_default(struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) spin_lock(&dndev_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) if (dev == decnet_default_device) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) decnet_default_device = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) dev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) spin_unlock(&dndev_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) if (dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) dev_put(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) * Called with RTNL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) static struct dn_dev *dn_dev_by_index(int ifindex)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) struct net_device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) struct dn_dev *dn_dev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) dev = __dev_get_by_index(&init_net, ifindex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) if (dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) dn_dev = rtnl_dereference(dev->dn_ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) return dn_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) static const struct nla_policy dn_ifa_policy[IFA_MAX+1] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) [IFA_ADDRESS] = { .type = NLA_U16 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) [IFA_LOCAL] = { .type = NLA_U16 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) [IFA_LABEL] = { .type = NLA_STRING,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) .len = IFNAMSIZ - 1 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) [IFA_FLAGS] = { .type = NLA_U32 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) static int dn_nl_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) struct netlink_ext_ack *extack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) struct net *net = sock_net(skb->sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) struct nlattr *tb[IFA_MAX+1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) struct dn_dev *dn_db;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) struct ifaddrmsg *ifm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) struct dn_ifaddr *ifa;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) struct dn_ifaddr __rcu **ifap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) int err = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) if (!netlink_capable(skb, CAP_NET_ADMIN))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) return -EPERM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) if (!net_eq(net, &init_net))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) goto errout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFA_MAX,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) dn_ifa_policy, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) goto errout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) err = -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) ifm = nlmsg_data(nlh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) if ((dn_db = dn_dev_by_index(ifm->ifa_index)) == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) goto errout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) err = -EADDRNOTAVAIL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) for (ifap = &dn_db->ifa_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) (ifa = rtnl_dereference(*ifap)) != NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) ifap = &ifa->ifa_next) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) if (tb[IFA_LOCAL] &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) nla_memcmp(tb[IFA_LOCAL], &ifa->ifa_local, 2))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) if (tb[IFA_LABEL] && nla_strcmp(tb[IFA_LABEL], ifa->ifa_label))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) dn_dev_del_ifa(dn_db, ifap, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) errout:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) static int dn_nl_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) struct netlink_ext_ack *extack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) struct net *net = sock_net(skb->sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) struct nlattr *tb[IFA_MAX+1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) struct net_device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) struct dn_dev *dn_db;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) struct ifaddrmsg *ifm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) struct dn_ifaddr *ifa;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) if (!netlink_capable(skb, CAP_NET_ADMIN))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) return -EPERM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) if (!net_eq(net, &init_net))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFA_MAX,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) dn_ifa_policy, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) if (tb[IFA_LOCAL] == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) ifm = nlmsg_data(nlh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) if ((dev = __dev_get_by_index(&init_net, ifm->ifa_index)) == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) if ((dn_db = rtnl_dereference(dev->dn_ptr)) == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) dn_db = dn_dev_create(dev, &err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) if (!dn_db)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) if ((ifa = dn_dev_alloc_ifa()) == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) return -ENOBUFS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) if (tb[IFA_ADDRESS] == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) tb[IFA_ADDRESS] = tb[IFA_LOCAL];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) ifa->ifa_local = nla_get_le16(tb[IFA_LOCAL]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) ifa->ifa_address = nla_get_le16(tb[IFA_ADDRESS]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) ifa->ifa_flags = tb[IFA_FLAGS] ? nla_get_u32(tb[IFA_FLAGS]) :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) ifm->ifa_flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) ifa->ifa_scope = ifm->ifa_scope;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) ifa->ifa_dev = dn_db;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) if (tb[IFA_LABEL])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) nla_strlcpy(ifa->ifa_label, tb[IFA_LABEL], IFNAMSIZ);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) memcpy(ifa->ifa_label, dev->name, IFNAMSIZ);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) err = dn_dev_insert_ifa(dn_db, ifa);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) dn_dev_free_ifa(ifa);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) static inline size_t dn_ifaddr_nlmsg_size(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) return NLMSG_ALIGN(sizeof(struct ifaddrmsg))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) + nla_total_size(IFNAMSIZ) /* IFA_LABEL */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) + nla_total_size(2) /* IFA_ADDRESS */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) + nla_total_size(2) /* IFA_LOCAL */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) + nla_total_size(4); /* IFA_FLAGS */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) static int dn_nl_fill_ifaddr(struct sk_buff *skb, struct dn_ifaddr *ifa,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) u32 portid, u32 seq, int event, unsigned int flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) struct ifaddrmsg *ifm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) struct nlmsghdr *nlh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) u32 ifa_flags = ifa->ifa_flags | IFA_F_PERMANENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) nlh = nlmsg_put(skb, portid, seq, event, sizeof(*ifm), flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) if (nlh == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) return -EMSGSIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) ifm = nlmsg_data(nlh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) ifm->ifa_family = AF_DECnet;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) ifm->ifa_prefixlen = 16;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) ifm->ifa_flags = ifa_flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) ifm->ifa_scope = ifa->ifa_scope;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) ifm->ifa_index = ifa->ifa_dev->dev->ifindex;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) if ((ifa->ifa_address &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) nla_put_le16(skb, IFA_ADDRESS, ifa->ifa_address)) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) (ifa->ifa_local &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) nla_put_le16(skb, IFA_LOCAL, ifa->ifa_local)) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) (ifa->ifa_label[0] &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) nla_put_string(skb, IFA_LABEL, ifa->ifa_label)) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) nla_put_u32(skb, IFA_FLAGS, ifa_flags))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) nlmsg_end(skb, nlh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) nla_put_failure:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) nlmsg_cancel(skb, nlh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) return -EMSGSIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) static void dn_ifaddr_notify(int event, struct dn_ifaddr *ifa)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) int err = -ENOBUFS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) skb = alloc_skb(dn_ifaddr_nlmsg_size(), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) if (skb == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) goto errout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) err = dn_nl_fill_ifaddr(skb, ifa, 0, 0, event, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) if (err < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) /* -EMSGSIZE implies BUG in dn_ifaddr_nlmsg_size() */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) WARN_ON(err == -EMSGSIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) kfree_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) goto errout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) rtnl_notify(skb, &init_net, 0, RTNLGRP_DECnet_IFADDR, NULL, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) errout:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) rtnl_set_sk_err(&init_net, RTNLGRP_DECnet_IFADDR, err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) static int dn_nl_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) struct net *net = sock_net(skb->sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) int idx, dn_idx = 0, skip_ndevs, skip_naddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) struct net_device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743) struct dn_dev *dn_db;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) struct dn_ifaddr *ifa;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746) if (!net_eq(net, &init_net))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) skip_ndevs = cb->args[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) skip_naddr = cb->args[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) idx = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) for_each_netdev_rcu(&init_net, dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755) if (idx < skip_ndevs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756) goto cont;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) else if (idx > skip_ndevs) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758) /* Only skip over addresses for first dev dumped
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) * in this iteration (idx == skip_ndevs) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760) skip_naddr = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) if ((dn_db = rcu_dereference(dev->dn_ptr)) == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) goto cont;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766) for (ifa = rcu_dereference(dn_db->ifa_list), dn_idx = 0; ifa;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) ifa = rcu_dereference(ifa->ifa_next), dn_idx++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) if (dn_idx < skip_naddr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) if (dn_nl_fill_ifaddr(skb, ifa, NETLINK_CB(cb->skb).portid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) cb->nlh->nlmsg_seq, RTM_NEWADDR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773) NLM_F_MULTI) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) cont:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) idx++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779) done:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) cb->args[0] = idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782) cb->args[1] = dn_idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) return skb->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) static int dn_dev_get_first(struct net_device *dev, __le16 *addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789) struct dn_dev *dn_db;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790) struct dn_ifaddr *ifa;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791) int rv = -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794) dn_db = rcu_dereference(dev->dn_ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) if (dn_db == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798) ifa = rcu_dereference(dn_db->ifa_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799) if (ifa != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800) *addr = ifa->ifa_local;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801) rv = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805) return rv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809) * Find a default address to bind to.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) * This is one of those areas where the initial VMS concepts don't really
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) * map onto the Linux concepts, and since we introduced multiple addresses
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813) * per interface we have to cope with slightly odd ways of finding out what
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814) * "our address" really is. Mostly it's not a problem; for this we just guess
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815) * a sensible default. Eventually the routing code will take care of all the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816) * nasties for us I hope.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818) int dn_dev_bind_default(__le16 *addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820) struct net_device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821) int rv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822) dev = dn_dev_get_default();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823) last_chance:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824) if (dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825) rv = dn_dev_get_first(dev, addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826) dev_put(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) if (rv == 0 || dev == init_net.loopback_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828) return rv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830) dev = init_net.loopback_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831) dev_hold(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) goto last_chance;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835) static void dn_send_endnode_hello(struct net_device *dev, struct dn_ifaddr *ifa)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837) struct endnode_hello_message *msg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838) struct sk_buff *skb = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839) __le16 *pktlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840) struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) if ((skb = dn_alloc_skb(NULL, sizeof(*msg), GFP_ATOMIC)) == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845) skb->dev = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847) msg = skb_put(skb, sizeof(*msg));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849) msg->msgflg = 0x0D;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850) memcpy(msg->tiver, dn_eco_version, 3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851) dn_dn2eth(msg->id, ifa->ifa_local);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852) msg->iinfo = DN_RT_INFO_ENDN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853) msg->blksize = cpu_to_le16(mtu2blksize(dev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854) msg->area = 0x00;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855) memset(msg->seed, 0, 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856) memcpy(msg->neighbor, dn_hiord, ETH_ALEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858) if (dn_db->router) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859) struct dn_neigh *dn = (struct dn_neigh *)dn_db->router;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860) dn_dn2eth(msg->neighbor, dn->addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863) msg->timer = cpu_to_le16((unsigned short)dn_db->parms.t3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864) msg->mpd = 0x00;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865) msg->datalen = 0x02;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866) memset(msg->data, 0xAA, 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868) pktlen = skb_push(skb, 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869) *pktlen = cpu_to_le16(skb->len - 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871) skb_reset_network_header(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873) dn_rt_finish_output(skb, dn_rt_all_rt_mcast, msg->id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877) #define DRDELAY (5 * HZ)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879) static int dn_am_i_a_router(struct dn_neigh *dn, struct dn_dev *dn_db, struct dn_ifaddr *ifa)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881) /* First check time since device went up */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882) if (time_before(jiffies, dn_db->uptime + DRDELAY))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885) /* If there is no router, then yes... */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886) if (!dn_db->router)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889) /* otherwise only if we have a higher priority or.. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890) if (dn->priority < dn_db->parms.priority)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893) /* if we have equal priority and a higher node number */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894) if (dn->priority != dn_db->parms.priority)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 897) if (le16_to_cpu(dn->addr) < le16_to_cpu(ifa->ifa_local))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 898) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 899)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 900) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 901) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 902)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 903) static void dn_send_router_hello(struct net_device *dev, struct dn_ifaddr *ifa)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 904) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 905) int n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 906) struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 907) struct dn_neigh *dn = (struct dn_neigh *)dn_db->router;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 908) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 909) size_t size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 910) unsigned char *ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 911) unsigned char *i1, *i2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 912) __le16 *pktlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 913) char *src;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 914)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 915) if (mtu2blksize(dev) < (26 + 7))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 916) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 917)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 918) n = mtu2blksize(dev) - 26;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 919) n /= 7;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 920)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 921) if (n > 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 922) n = 32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 923)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 924) size = 2 + 26 + 7 * n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 925)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 926) if ((skb = dn_alloc_skb(NULL, size, GFP_ATOMIC)) == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 927) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 928)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 929) skb->dev = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 930) ptr = skb_put(skb, size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 931)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 932) *ptr++ = DN_RT_PKT_CNTL | DN_RT_PKT_ERTH;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 933) *ptr++ = 2; /* ECO */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 934) *ptr++ = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 935) *ptr++ = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 936) dn_dn2eth(ptr, ifa->ifa_local);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 937) src = ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 938) ptr += ETH_ALEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 939) *ptr++ = dn_db->parms.forwarding == 1 ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 940) DN_RT_INFO_L1RT : DN_RT_INFO_L2RT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 941) *((__le16 *)ptr) = cpu_to_le16(mtu2blksize(dev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 942) ptr += 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 943) *ptr++ = dn_db->parms.priority; /* Priority */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 944) *ptr++ = 0; /* Area: Reserved */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 945) *((__le16 *)ptr) = cpu_to_le16((unsigned short)dn_db->parms.t3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 946) ptr += 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 947) *ptr++ = 0; /* MPD: Reserved */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 948) i1 = ptr++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 949) memset(ptr, 0, 7); /* Name: Reserved */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 950) ptr += 7;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 951) i2 = ptr++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 952)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 953) n = dn_neigh_elist(dev, ptr, n);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 954)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 955) *i2 = 7 * n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 956) *i1 = 8 + *i2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 957)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 958) skb_trim(skb, (27 + *i2));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 959)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 960) pktlen = skb_push(skb, 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 961) *pktlen = cpu_to_le16(skb->len - 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 962)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 963) skb_reset_network_header(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 964)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 965) if (dn_am_i_a_router(dn, dn_db, ifa)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 966) struct sk_buff *skb2 = skb_copy(skb, GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 967) if (skb2) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 968) dn_rt_finish_output(skb2, dn_rt_all_end_mcast, src);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 969) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 970) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 971)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 972) dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 973) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 974)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 975) static void dn_send_brd_hello(struct net_device *dev, struct dn_ifaddr *ifa)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 976) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 977) struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 978)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 979) if (dn_db->parms.forwarding == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 980) dn_send_endnode_hello(dev, ifa);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 981) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 982) dn_send_router_hello(dev, ifa);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 983) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 984)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 985) static void dn_send_ptp_hello(struct net_device *dev, struct dn_ifaddr *ifa)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 986) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 987) int tdlen = 16;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 988) int size = dev->hard_header_len + 2 + 4 + tdlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 989) struct sk_buff *skb = dn_alloc_skb(NULL, size, GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 990) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 991) unsigned char *ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 992) char src[ETH_ALEN];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 993)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 994) if (skb == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 995) return ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 996)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 997) skb->dev = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 998) skb_push(skb, dev->hard_header_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 999) ptr = skb_put(skb, 2 + 4 + tdlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1000)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1001) *ptr++ = DN_RT_PKT_HELO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1002) *((__le16 *)ptr) = ifa->ifa_local;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1003) ptr += 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1004) *ptr++ = tdlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1005)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1006) for(i = 0; i < tdlen; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1007) *ptr++ = 0252;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1008)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1009) dn_dn2eth(src, ifa->ifa_local);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1010) dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1011) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1012)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1013) static int dn_eth_up(struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1014) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1015) struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1016)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1017) if (dn_db->parms.forwarding == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1018) dev_mc_add(dev, dn_rt_all_end_mcast);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1019) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1020) dev_mc_add(dev, dn_rt_all_rt_mcast);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1021)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1022) dn_db->use_long = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1023)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1024) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1025) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1026)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1027) static void dn_eth_down(struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1028) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1029) struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1030)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1031) if (dn_db->parms.forwarding == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1032) dev_mc_del(dev, dn_rt_all_end_mcast);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1033) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1034) dev_mc_del(dev, dn_rt_all_rt_mcast);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1035) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1036)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1037) static void dn_dev_set_timer(struct net_device *dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1038)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1039) static void dn_dev_timer_func(struct timer_list *t)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1040) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1041) struct dn_dev *dn_db = from_timer(dn_db, t, timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1042) struct net_device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1043) struct dn_ifaddr *ifa;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1044)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1045) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1046) dev = dn_db->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1047) if (dn_db->t3 <= dn_db->parms.t2) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1048) if (dn_db->parms.timer3) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1049) for (ifa = rcu_dereference(dn_db->ifa_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1050) ifa;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1051) ifa = rcu_dereference(ifa->ifa_next)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1052) if (!(ifa->ifa_flags & IFA_F_SECONDARY))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1053) dn_db->parms.timer3(dev, ifa);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1054) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1055) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1056) dn_db->t3 = dn_db->parms.t3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1057) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1058) dn_db->t3 -= dn_db->parms.t2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1059) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1060) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1061) dn_dev_set_timer(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1062) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1063)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1064) static void dn_dev_set_timer(struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1065) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1066) struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1067)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1068) if (dn_db->parms.t2 > dn_db->parms.t3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1069) dn_db->parms.t2 = dn_db->parms.t3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1070)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1071) dn_db->timer.expires = jiffies + (dn_db->parms.t2 * HZ);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1072)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1073) add_timer(&dn_db->timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1074) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1075)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1076) static struct dn_dev *dn_dev_create(struct net_device *dev, int *err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1077) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1078) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1079) struct dn_dev_parms *p = dn_dev_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1080) struct dn_dev *dn_db;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1081)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1082) for(i = 0; i < DN_DEV_LIST_SIZE; i++, p++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1083) if (p->type == dev->type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1084) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1085) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1086)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1087) *err = -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1088) if (i == DN_DEV_LIST_SIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1089) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1090)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1091) *err = -ENOBUFS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1092) if ((dn_db = kzalloc(sizeof(struct dn_dev), GFP_ATOMIC)) == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1093) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1094)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1095) memcpy(&dn_db->parms, p, sizeof(struct dn_dev_parms));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1096)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1097) rcu_assign_pointer(dev->dn_ptr, dn_db);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1098) dn_db->dev = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1099) timer_setup(&dn_db->timer, dn_dev_timer_func, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1101) dn_db->uptime = jiffies;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1103) dn_db->neigh_parms = neigh_parms_alloc(dev, &dn_neigh_table);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1104) if (!dn_db->neigh_parms) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1105) RCU_INIT_POINTER(dev->dn_ptr, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1106) kfree(dn_db);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1107) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1108) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1110) if (dn_db->parms.up) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1111) if (dn_db->parms.up(dev) < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1112) neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1113) dev->dn_ptr = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1114) kfree(dn_db);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1115) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1116) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1117) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1119) dn_dev_sysctl_register(dev, &dn_db->parms);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1121) dn_dev_set_timer(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1123) *err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1124) return dn_db;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1125) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1128) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1129) * This processes a device up event. We only start up
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1130) * the loopback device & ethernet devices with correct
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1131) * MAC addresses automatically. Others must be started
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1132) * specifically.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1133) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1134) * FIXME: How should we configure the loopback address ? If we could dispense
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1135) * with using decnet_address here and for autobind, it will be one less thing
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1136) * for users to worry about setting up.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1137) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1139) void dn_dev_up(struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1140) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1141) struct dn_ifaddr *ifa;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1142) __le16 addr = decnet_address;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1143) int maybe_default = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1144) struct dn_dev *dn_db = rtnl_dereference(dev->dn_ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1146) if ((dev->type != ARPHRD_ETHER) && (dev->type != ARPHRD_LOOPBACK))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1147) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1149) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1150) * Need to ensure that loopback device has a dn_db attached to it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1151) * to allow creation of neighbours against it, even though it might
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1152) * not have a local address of its own. Might as well do the same for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1153) * all autoconfigured interfaces.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1154) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1155) if (dn_db == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1156) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1157) dn_db = dn_dev_create(dev, &err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1158) if (dn_db == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1159) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1160) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1161)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1162) if (dev->type == ARPHRD_ETHER) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1163) if (memcmp(dev->dev_addr, dn_hiord, 4) != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1164) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1165) addr = dn_eth2dn(dev->dev_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1166) maybe_default = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1167) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1169) if (addr == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1170) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1171)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1172) if ((ifa = dn_dev_alloc_ifa()) == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1173) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1174)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1175) ifa->ifa_local = ifa->ifa_address = addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1176) ifa->ifa_flags = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1177) ifa->ifa_scope = RT_SCOPE_UNIVERSE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1178) strcpy(ifa->ifa_label, dev->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1179)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1180) dn_dev_set_ifa(dev, ifa);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1181)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1182) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1183) * Automagically set the default device to the first automatically
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1184) * configured ethernet card in the system.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1185) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1186) if (maybe_default) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1187) dev_hold(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1188) if (dn_dev_set_default(dev, 0))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1189) dev_put(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1190) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1191) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1192)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1193) static void dn_dev_delete(struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1194) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1195) struct dn_dev *dn_db = rtnl_dereference(dev->dn_ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1196)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1197) if (dn_db == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1198) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1199)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1200) del_timer_sync(&dn_db->timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1201) dn_dev_sysctl_unregister(&dn_db->parms);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1202) dn_dev_check_default(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1203) neigh_ifdown(&dn_neigh_table, dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1204)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1205) if (dn_db->parms.down)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1206) dn_db->parms.down(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1207)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1208) dev->dn_ptr = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1209)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1210) neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1211) neigh_ifdown(&dn_neigh_table, dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1212)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1213) if (dn_db->router)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1214) neigh_release(dn_db->router);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1215) if (dn_db->peer)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1216) neigh_release(dn_db->peer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1217)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1218) kfree(dn_db);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1219) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1220)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1221) void dn_dev_down(struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1222) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1223) struct dn_dev *dn_db = rtnl_dereference(dev->dn_ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1224) struct dn_ifaddr *ifa;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1225)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1226) if (dn_db == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1227) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1228)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1229) while ((ifa = rtnl_dereference(dn_db->ifa_list)) != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1230) dn_dev_del_ifa(dn_db, &dn_db->ifa_list, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1231) dn_dev_free_ifa(ifa);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1232) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1233)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1234) dn_dev_delete(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1235) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1236)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1237) void dn_dev_init_pkt(struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1238) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1239) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1240)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1241) void dn_dev_veri_pkt(struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1242) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1243) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1244)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1245) void dn_dev_hello(struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1246) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1247) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1248)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1249) void dn_dev_devices_off(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1250) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1251) struct net_device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1252)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1253) rtnl_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1254) for_each_netdev(&init_net, dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1255) dn_dev_down(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1256) rtnl_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1257)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1258) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1259)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1260) void dn_dev_devices_on(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1261) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1262) struct net_device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1263)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1264) rtnl_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1265) for_each_netdev(&init_net, dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1266) if (dev->flags & IFF_UP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1267) dn_dev_up(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1268) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1269) rtnl_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1270) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1271)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1272) int register_dnaddr_notifier(struct notifier_block *nb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1273) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1274) return blocking_notifier_chain_register(&dnaddr_chain, nb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1275) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1276)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1277) int unregister_dnaddr_notifier(struct notifier_block *nb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1278) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1279) return blocking_notifier_chain_unregister(&dnaddr_chain, nb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1280) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1281)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1282) #ifdef CONFIG_PROC_FS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1283) static inline int is_dn_dev(struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1284) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1285) return dev->dn_ptr != NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1286) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1287)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1288) static void *dn_dev_seq_start(struct seq_file *seq, loff_t *pos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1289) __acquires(RCU)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1290) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1291) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1292) struct net_device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1293)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1294) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1295)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1296) if (*pos == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1297) return SEQ_START_TOKEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1298)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1299) i = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1300) for_each_netdev_rcu(&init_net, dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1301) if (!is_dn_dev(dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1302) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1303)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1304) if (i++ == *pos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1305) return dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1306) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1307)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1308) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1309) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1310)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1311) static void *dn_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1312) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1313) struct net_device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1314)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1315) ++*pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1316)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1317) dev = v;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1318) if (v == SEQ_START_TOKEN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1319) dev = net_device_entry(&init_net.dev_base_head);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1320)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1321) for_each_netdev_continue_rcu(&init_net, dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1322) if (!is_dn_dev(dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1323) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1324)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1325) return dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1326) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1327)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1328) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1329) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1330)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1331) static void dn_dev_seq_stop(struct seq_file *seq, void *v)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1332) __releases(RCU)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1333) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1334) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1335) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1336)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1337) static char *dn_type2asc(char type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1338) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1339) switch (type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1340) case DN_DEV_BCAST:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1341) return "B";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1342) case DN_DEV_UCAST:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1343) return "U";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1344) case DN_DEV_MPOINT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1345) return "M";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1346) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1347)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1348) return "?";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1349) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1350)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1351) static int dn_dev_seq_show(struct seq_file *seq, void *v)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1352) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1353) if (v == SEQ_START_TOKEN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1354) seq_puts(seq, "Name Flags T1 Timer1 T3 Timer3 BlkSize Pri State DevType Router Peer\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1355) else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1356) struct net_device *dev = v;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1357) char peer_buf[DN_ASCBUF_LEN];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1358) char router_buf[DN_ASCBUF_LEN];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1359) struct dn_dev *dn_db = rcu_dereference(dev->dn_ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1360)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1361) seq_printf(seq, "%-8s %1s %04u %04u %04lu %04lu"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1362) " %04hu %03d %02x %-10s %-7s %-7s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1363) dev->name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1364) dn_type2asc(dn_db->parms.mode),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1365) 0, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1366) dn_db->t3, dn_db->parms.t3,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1367) mtu2blksize(dev),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1368) dn_db->parms.priority,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1369) dn_db->parms.state, dn_db->parms.name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1370) dn_db->router ? dn_addr2asc(le16_to_cpu(*(__le16 *)dn_db->router->primary_key), router_buf) : "",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1371) dn_db->peer ? dn_addr2asc(le16_to_cpu(*(__le16 *)dn_db->peer->primary_key), peer_buf) : "");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1372) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1373) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1374) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1375)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1376) static const struct seq_operations dn_dev_seq_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1377) .start = dn_dev_seq_start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1378) .next = dn_dev_seq_next,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1379) .stop = dn_dev_seq_stop,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1380) .show = dn_dev_seq_show,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1381) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1382) #endif /* CONFIG_PROC_FS */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1383)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1384) static int addr[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1385) module_param_array(addr, int, NULL, 0444);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1386) MODULE_PARM_DESC(addr, "The DECnet address of this machine: area,node");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1387)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1388) void __init dn_dev_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1389) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1390) if (addr[0] > 63 || addr[0] < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1391) printk(KERN_ERR "DECnet: Area must be between 0 and 63");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1392) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1393) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1394)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1395) if (addr[1] > 1023 || addr[1] < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1396) printk(KERN_ERR "DECnet: Node must be between 0 and 1023");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1397) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1398) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1399)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1400) decnet_address = cpu_to_le16((addr[0] << 10) | addr[1]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1401)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1402) dn_dev_devices_on();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1403)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1404) rtnl_register_module(THIS_MODULE, PF_DECnet, RTM_NEWADDR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1405) dn_nl_newaddr, NULL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1406) rtnl_register_module(THIS_MODULE, PF_DECnet, RTM_DELADDR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1407) dn_nl_deladdr, NULL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1408) rtnl_register_module(THIS_MODULE, PF_DECnet, RTM_GETADDR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1409) NULL, dn_nl_dump_ifaddr, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1410)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1411) proc_create_seq("decnet_dev", 0444, init_net.proc_net, &dn_dev_seq_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1412)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1413) #ifdef CONFIG_SYSCTL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1414) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1415) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1416) for(i = 0; i < DN_DEV_LIST_SIZE; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1417) dn_dev_sysctl_register(NULL, &dn_dev_list[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1418) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1419) #endif /* CONFIG_SYSCTL */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1420) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1421)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1422) void __exit dn_dev_cleanup(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1423) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1424) #ifdef CONFIG_SYSCTL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1425) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1426) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1427) for(i = 0; i < DN_DEV_LIST_SIZE; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1428) dn_dev_sysctl_unregister(&dn_dev_list[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1429) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1430) #endif /* CONFIG_SYSCTL */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1431)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1432) remove_proc_entry("decnet_dev", init_net.proc_net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1433)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1434) dn_dev_devices_off();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1435) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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