diff options
Diffstat (limited to 'net/decnet/dn_rules.c')
-rw-r--r-- | net/decnet/dn_rules.c | 511 |
1 files changed, 201 insertions, 310 deletions
diff --git a/net/decnet/dn_rules.c b/net/decnet/dn_rules.c index 6986be754ef2..3e0c882c90bf 100644 --- a/net/decnet/dn_rules.c +++ b/net/decnet/dn_rules.c | |||
@@ -11,259 +11,213 @@ | |||
11 | * | 11 | * |
12 | * | 12 | * |
13 | * Changes: | 13 | * Changes: |
14 | * Steve Whitehouse <steve@chygwyn.com> | ||
15 | * Updated for Thomas Graf's generic rules | ||
14 | * | 16 | * |
15 | */ | 17 | */ |
16 | #include <linux/string.h> | ||
17 | #include <linux/net.h> | 18 | #include <linux/net.h> |
18 | #include <linux/socket.h> | ||
19 | #include <linux/sockios.h> | ||
20 | #include <linux/init.h> | 19 | #include <linux/init.h> |
21 | #include <linux/skbuff.h> | ||
22 | #include <linux/netlink.h> | 20 | #include <linux/netlink.h> |
23 | #include <linux/rtnetlink.h> | 21 | #include <linux/rtnetlink.h> |
24 | #include <linux/proc_fs.h> | ||
25 | #include <linux/netdevice.h> | 22 | #include <linux/netdevice.h> |
26 | #include <linux/timer.h> | ||
27 | #include <linux/spinlock.h> | 23 | #include <linux/spinlock.h> |
28 | #include <linux/in_route.h> | ||
29 | #include <linux/list.h> | 24 | #include <linux/list.h> |
30 | #include <linux/rcupdate.h> | 25 | #include <linux/rcupdate.h> |
31 | #include <asm/atomic.h> | ||
32 | #include <asm/uaccess.h> | ||
33 | #include <net/neighbour.h> | 26 | #include <net/neighbour.h> |
34 | #include <net/dst.h> | 27 | #include <net/dst.h> |
35 | #include <net/flow.h> | 28 | #include <net/flow.h> |
29 | #include <net/fib_rules.h> | ||
36 | #include <net/dn.h> | 30 | #include <net/dn.h> |
37 | #include <net/dn_fib.h> | 31 | #include <net/dn_fib.h> |
38 | #include <net/dn_neigh.h> | 32 | #include <net/dn_neigh.h> |
39 | #include <net/dn_dev.h> | 33 | #include <net/dn_dev.h> |
40 | 34 | ||
35 | static struct fib_rules_ops dn_fib_rules_ops; | ||
36 | |||
41 | struct dn_fib_rule | 37 | struct dn_fib_rule |
42 | { | 38 | { |
43 | struct hlist_node r_hlist; | 39 | struct fib_rule common; |
44 | atomic_t r_clntref; | 40 | unsigned char dst_len; |
45 | u32 r_preference; | 41 | unsigned char src_len; |
46 | unsigned char r_table; | 42 | __le16 src; |
47 | unsigned char r_action; | 43 | __le16 srcmask; |
48 | unsigned char r_dst_len; | 44 | __le16 dst; |
49 | unsigned char r_src_len; | 45 | __le16 dstmask; |
50 | __le16 r_src; | 46 | __le16 srcmap; |
51 | __le16 r_srcmask; | 47 | u8 flags; |
52 | __le16 r_dst; | ||
53 | __le16 r_dstmask; | ||
54 | __le16 r_srcmap; | ||
55 | u8 r_flags; | ||
56 | #ifdef CONFIG_DECNET_ROUTE_FWMARK | 48 | #ifdef CONFIG_DECNET_ROUTE_FWMARK |
57 | u32 r_fwmark; | 49 | u32 fwmark; |
50 | u32 fwmask; | ||
58 | #endif | 51 | #endif |
59 | int r_ifindex; | ||
60 | char r_ifname[IFNAMSIZ]; | ||
61 | int r_dead; | ||
62 | struct rcu_head rcu; | ||
63 | }; | 52 | }; |
64 | 53 | ||
65 | static struct dn_fib_rule default_rule = { | 54 | static struct dn_fib_rule default_rule = { |
66 | .r_clntref = ATOMIC_INIT(2), | 55 | .common = { |
67 | .r_preference = 0x7fff, | 56 | .refcnt = ATOMIC_INIT(2), |
68 | .r_table = RT_TABLE_MAIN, | 57 | .pref = 0x7fff, |
69 | .r_action = RTN_UNICAST | 58 | .table = RT_TABLE_MAIN, |
59 | .action = FR_ACT_TO_TBL, | ||
60 | }, | ||
70 | }; | 61 | }; |
71 | 62 | ||
72 | static struct hlist_head dn_fib_rules; | 63 | static LIST_HEAD(dn_fib_rules); |
64 | |||
73 | 65 | ||
74 | int dn_fib_rtm_delrule(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) | 66 | int dn_fib_lookup(struct flowi *flp, struct dn_fib_res *res) |
75 | { | 67 | { |
76 | struct rtattr **rta = arg; | 68 | struct fib_lookup_arg arg = { |
77 | struct rtmsg *rtm = NLMSG_DATA(nlh); | 69 | .result = res, |
78 | struct dn_fib_rule *r; | 70 | }; |
79 | struct hlist_node *node; | 71 | int err; |
80 | int err = -ESRCH; | 72 | |
81 | 73 | err = fib_rules_lookup(&dn_fib_rules_ops, flp, 0, &arg); | |
82 | hlist_for_each_entry(r, node, &dn_fib_rules, r_hlist) { | 74 | res->r = arg.rule; |
83 | if ((!rta[RTA_SRC-1] || memcmp(RTA_DATA(rta[RTA_SRC-1]), &r->r_src, 2) == 0) && | ||
84 | rtm->rtm_src_len == r->r_src_len && | ||
85 | rtm->rtm_dst_len == r->r_dst_len && | ||
86 | (!rta[RTA_DST-1] || memcmp(RTA_DATA(rta[RTA_DST-1]), &r->r_dst, 2) == 0) && | ||
87 | #ifdef CONFIG_DECNET_ROUTE_FWMARK | ||
88 | (!rta[RTA_PROTOINFO-1] || memcmp(RTA_DATA(rta[RTA_PROTOINFO-1]), &r->r_fwmark, 4) == 0) && | ||
89 | #endif | ||
90 | (!rtm->rtm_type || rtm->rtm_type == r->r_action) && | ||
91 | (!rta[RTA_PRIORITY-1] || memcmp(RTA_DATA(rta[RTA_PRIORITY-1]), &r->r_preference, 4) == 0) && | ||
92 | (!rta[RTA_IIF-1] || rtattr_strcmp(rta[RTA_IIF-1], r->r_ifname) == 0) && | ||
93 | (!rtm->rtm_table || (r && rtm->rtm_table == r->r_table))) { | ||
94 | |||
95 | err = -EPERM; | ||
96 | if (r == &default_rule) | ||
97 | break; | ||
98 | |||
99 | hlist_del_rcu(&r->r_hlist); | ||
100 | r->r_dead = 1; | ||
101 | dn_fib_rule_put(r); | ||
102 | err = 0; | ||
103 | break; | ||
104 | } | ||
105 | } | ||
106 | 75 | ||
107 | return err; | 76 | return err; |
108 | } | 77 | } |
109 | 78 | ||
110 | static inline void dn_fib_rule_put_rcu(struct rcu_head *head) | 79 | static int dn_fib_rule_action(struct fib_rule *rule, struct flowi *flp, |
80 | int flags, struct fib_lookup_arg *arg) | ||
111 | { | 81 | { |
112 | struct dn_fib_rule *r = container_of(head, struct dn_fib_rule, rcu); | 82 | int err = -EAGAIN; |
113 | kfree(r); | 83 | struct dn_fib_table *tbl; |
114 | } | ||
115 | 84 | ||
116 | void dn_fib_rule_put(struct dn_fib_rule *r) | 85 | switch(rule->action) { |
117 | { | 86 | case FR_ACT_TO_TBL: |
118 | if (atomic_dec_and_test(&r->r_clntref)) { | 87 | break; |
119 | if (r->r_dead) | 88 | |
120 | call_rcu(&r->rcu, dn_fib_rule_put_rcu); | 89 | case FR_ACT_UNREACHABLE: |
121 | else | 90 | err = -ENETUNREACH; |
122 | printk(KERN_DEBUG "Attempt to free alive dn_fib_rule\n"); | 91 | goto errout; |
92 | |||
93 | case FR_ACT_PROHIBIT: | ||
94 | err = -EACCES; | ||
95 | goto errout; | ||
96 | |||
97 | case FR_ACT_BLACKHOLE: | ||
98 | default: | ||
99 | err = -EINVAL; | ||
100 | goto errout; | ||
123 | } | 101 | } |
102 | |||
103 | tbl = dn_fib_get_table(rule->table, 0); | ||
104 | if (tbl == NULL) | ||
105 | goto errout; | ||
106 | |||
107 | err = tbl->lookup(tbl, flp, (struct dn_fib_res *)arg->result); | ||
108 | if (err > 0) | ||
109 | err = -EAGAIN; | ||
110 | errout: | ||
111 | return err; | ||
124 | } | 112 | } |
125 | 113 | ||
114 | static struct nla_policy dn_fib_rule_policy[FRA_MAX+1] __read_mostly = { | ||
115 | [FRA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ - 1 }, | ||
116 | [FRA_PRIORITY] = { .type = NLA_U32 }, | ||
117 | [FRA_SRC] = { .type = NLA_U16 }, | ||
118 | [FRA_DST] = { .type = NLA_U16 }, | ||
119 | [FRA_FWMARK] = { .type = NLA_U32 }, | ||
120 | [FRA_FWMASK] = { .type = NLA_U32 }, | ||
121 | [FRA_TABLE] = { .type = NLA_U32 }, | ||
122 | }; | ||
126 | 123 | ||
127 | int dn_fib_rtm_newrule(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) | 124 | static int dn_fib_rule_match(struct fib_rule *rule, struct flowi *fl, int flags) |
128 | { | 125 | { |
129 | struct rtattr **rta = arg; | 126 | struct dn_fib_rule *r = (struct dn_fib_rule *)rule; |
130 | struct rtmsg *rtm = NLMSG_DATA(nlh); | 127 | u16 daddr = fl->fld_dst; |
131 | struct dn_fib_rule *r, *new_r, *last = NULL; | 128 | u16 saddr = fl->fld_src; |
132 | struct hlist_node *node = NULL; | 129 | |
133 | unsigned char table_id; | 130 | if (((saddr ^ r->src) & r->srcmask) || |
134 | 131 | ((daddr ^ r->dst) & r->dstmask)) | |
135 | if (rtm->rtm_src_len > 16 || rtm->rtm_dst_len > 16) | 132 | return 0; |
136 | return -EINVAL; | ||
137 | |||
138 | if (rta[RTA_IIF-1] && RTA_PAYLOAD(rta[RTA_IIF-1]) > IFNAMSIZ) | ||
139 | return -EINVAL; | ||
140 | |||
141 | if (rtm->rtm_type == RTN_NAT) | ||
142 | return -EINVAL; | ||
143 | |||
144 | table_id = rtm->rtm_table; | ||
145 | if (table_id == RT_TABLE_UNSPEC) { | ||
146 | struct dn_fib_table *tb; | ||
147 | if (rtm->rtm_type == RTN_UNICAST) { | ||
148 | if ((tb = dn_fib_empty_table()) == NULL) | ||
149 | return -ENOBUFS; | ||
150 | table_id = tb->n; | ||
151 | } | ||
152 | } | ||
153 | 133 | ||
154 | new_r = kzalloc(sizeof(*new_r), GFP_KERNEL); | ||
155 | if (!new_r) | ||
156 | return -ENOMEM; | ||
157 | |||
158 | if (rta[RTA_SRC-1]) | ||
159 | memcpy(&new_r->r_src, RTA_DATA(rta[RTA_SRC-1]), 2); | ||
160 | if (rta[RTA_DST-1]) | ||
161 | memcpy(&new_r->r_dst, RTA_DATA(rta[RTA_DST-1]), 2); | ||
162 | if (rta[RTA_GATEWAY-1]) | ||
163 | memcpy(&new_r->r_srcmap, RTA_DATA(rta[RTA_GATEWAY-1]), 2); | ||
164 | new_r->r_src_len = rtm->rtm_src_len; | ||
165 | new_r->r_dst_len = rtm->rtm_dst_len; | ||
166 | new_r->r_srcmask = dnet_make_mask(rtm->rtm_src_len); | ||
167 | new_r->r_dstmask = dnet_make_mask(rtm->rtm_dst_len); | ||
168 | #ifdef CONFIG_DECNET_ROUTE_FWMARK | 134 | #ifdef CONFIG_DECNET_ROUTE_FWMARK |
169 | if (rta[RTA_PROTOINFO-1]) | 135 | if ((r->fwmark ^ fl->fld_fwmark) & r->fwmask) |
170 | memcpy(&new_r->r_fwmark, RTA_DATA(rta[RTA_PROTOINFO-1]), 4); | 136 | return 0; |
171 | #endif | 137 | #endif |
172 | new_r->r_action = rtm->rtm_type; | ||
173 | new_r->r_flags = rtm->rtm_flags; | ||
174 | if (rta[RTA_PRIORITY-1]) | ||
175 | memcpy(&new_r->r_preference, RTA_DATA(rta[RTA_PRIORITY-1]), 4); | ||
176 | new_r->r_table = table_id; | ||
177 | if (rta[RTA_IIF-1]) { | ||
178 | struct net_device *dev; | ||
179 | rtattr_strlcpy(new_r->r_ifname, rta[RTA_IIF-1], IFNAMSIZ); | ||
180 | new_r->r_ifindex = -1; | ||
181 | dev = dev_get_by_name(new_r->r_ifname); | ||
182 | if (dev) { | ||
183 | new_r->r_ifindex = dev->ifindex; | ||
184 | dev_put(dev); | ||
185 | } | ||
186 | } | ||
187 | 138 | ||
188 | r = container_of(dn_fib_rules.first, struct dn_fib_rule, r_hlist); | 139 | return 1; |
189 | if (!new_r->r_preference) { | 140 | } |
190 | if (r && r->r_hlist.next != NULL) { | 141 | |
191 | r = container_of(r->r_hlist.next, struct dn_fib_rule, r_hlist); | 142 | static int dn_fib_rule_configure(struct fib_rule *rule, struct sk_buff *skb, |
192 | if (r->r_preference) | 143 | struct nlmsghdr *nlh, struct fib_rule_hdr *frh, |
193 | new_r->r_preference = r->r_preference - 1; | 144 | struct nlattr **tb) |
145 | { | ||
146 | int err = -EINVAL; | ||
147 | struct dn_fib_rule *r = (struct dn_fib_rule *)rule; | ||
148 | |||
149 | if (frh->src_len > 16 || frh->dst_len > 16 || frh->tos) | ||
150 | goto errout; | ||
151 | |||
152 | if (rule->table == RT_TABLE_UNSPEC) { | ||
153 | if (rule->action == FR_ACT_TO_TBL) { | ||
154 | struct dn_fib_table *table; | ||
155 | |||
156 | table = dn_fib_empty_table(); | ||
157 | if (table == NULL) { | ||
158 | err = -ENOBUFS; | ||
159 | goto errout; | ||
160 | } | ||
161 | |||
162 | rule->table = table->n; | ||
194 | } | 163 | } |
195 | } | 164 | } |
196 | 165 | ||
197 | hlist_for_each_entry(r, node, &dn_fib_rules, r_hlist) { | 166 | if (tb[FRA_SRC]) |
198 | if (r->r_preference > new_r->r_preference) | 167 | r->src = nla_get_u16(tb[FRA_SRC]); |
199 | break; | 168 | |
200 | last = r; | 169 | if (tb[FRA_DST]) |
170 | r->dst = nla_get_u16(tb[FRA_DST]); | ||
171 | |||
172 | #ifdef CONFIG_DECNET_ROUTE_FWMARK | ||
173 | if (tb[FRA_FWMARK]) { | ||
174 | r->fwmark = nla_get_u32(tb[FRA_FWMARK]); | ||
175 | if (r->fwmark) | ||
176 | /* compatibility: if the mark value is non-zero all bits | ||
177 | * are compared unless a mask is explicitly specified. | ||
178 | */ | ||
179 | r->fwmask = 0xFFFFFFFF; | ||
201 | } | 180 | } |
202 | atomic_inc(&new_r->r_clntref); | ||
203 | 181 | ||
204 | if (last) | 182 | if (tb[FRA_FWMASK]) |
205 | hlist_add_after_rcu(&last->r_hlist, &new_r->r_hlist); | 183 | r->fwmask = nla_get_u32(tb[FRA_FWMASK]); |
206 | else | 184 | #endif |
207 | hlist_add_before_rcu(&new_r->r_hlist, &r->r_hlist); | ||
208 | return 0; | ||
209 | } | ||
210 | 185 | ||
186 | r->src_len = frh->src_len; | ||
187 | r->srcmask = dnet_make_mask(r->src_len); | ||
188 | r->dst_len = frh->dst_len; | ||
189 | r->dstmask = dnet_make_mask(r->dst_len); | ||
190 | err = 0; | ||
191 | errout: | ||
192 | return err; | ||
193 | } | ||
211 | 194 | ||
212 | int dn_fib_lookup(const struct flowi *flp, struct dn_fib_res *res) | 195 | static int dn_fib_rule_compare(struct fib_rule *rule, struct fib_rule_hdr *frh, |
196 | struct nlattr **tb) | ||
213 | { | 197 | { |
214 | struct dn_fib_rule *r, *policy; | 198 | struct dn_fib_rule *r = (struct dn_fib_rule *)rule; |
215 | struct dn_fib_table *tb; | 199 | |
216 | __le16 saddr = flp->fld_src; | 200 | if (frh->src_len && (r->src_len != frh->src_len)) |
217 | __le16 daddr = flp->fld_dst; | 201 | return 0; |
218 | struct hlist_node *node; | ||
219 | int err; | ||
220 | 202 | ||
221 | rcu_read_lock(); | 203 | if (frh->dst_len && (r->dst_len != frh->dst_len)) |
204 | return 0; | ||
222 | 205 | ||
223 | hlist_for_each_entry_rcu(r, node, &dn_fib_rules, r_hlist) { | ||
224 | if (((saddr^r->r_src) & r->r_srcmask) || | ||
225 | ((daddr^r->r_dst) & r->r_dstmask) || | ||
226 | #ifdef CONFIG_DECNET_ROUTE_FWMARK | 206 | #ifdef CONFIG_DECNET_ROUTE_FWMARK |
227 | (r->r_fwmark && r->r_fwmark != flp->fld_fwmark) || | 207 | if (tb[FRA_FWMARK] && (r->fwmark != nla_get_u32(tb[FRA_FWMARK]))) |
208 | return 0; | ||
209 | |||
210 | if (tb[FRA_FWMASK] && (r->fwmask != nla_get_u32(tb[FRA_FWMASK]))) | ||
211 | return 0; | ||
228 | #endif | 212 | #endif |
229 | (r->r_ifindex && r->r_ifindex != flp->iif)) | ||
230 | continue; | ||
231 | |||
232 | switch(r->r_action) { | ||
233 | case RTN_UNICAST: | ||
234 | case RTN_NAT: | ||
235 | policy = r; | ||
236 | break; | ||
237 | case RTN_UNREACHABLE: | ||
238 | rcu_read_unlock(); | ||
239 | return -ENETUNREACH; | ||
240 | default: | ||
241 | case RTN_BLACKHOLE: | ||
242 | rcu_read_unlock(); | ||
243 | return -EINVAL; | ||
244 | case RTN_PROHIBIT: | ||
245 | rcu_read_unlock(); | ||
246 | return -EACCES; | ||
247 | } | ||
248 | 213 | ||
249 | if ((tb = dn_fib_get_table(r->r_table, 0)) == NULL) | 214 | if (tb[FRA_SRC] && (r->src != nla_get_u16(tb[FRA_SRC]))) |
250 | continue; | 215 | return 0; |
251 | err = tb->lookup(tb, flp, res); | 216 | |
252 | if (err == 0) { | 217 | if (tb[FRA_DST] && (r->dst != nla_get_u16(tb[FRA_DST]))) |
253 | res->r = policy; | 218 | return 0; |
254 | if (policy) | ||
255 | atomic_inc(&policy->r_clntref); | ||
256 | rcu_read_unlock(); | ||
257 | return 0; | ||
258 | } | ||
259 | if (err < 0 && err != -EAGAIN) { | ||
260 | rcu_read_unlock(); | ||
261 | return err; | ||
262 | } | ||
263 | } | ||
264 | 219 | ||
265 | rcu_read_unlock(); | 220 | return 1; |
266 | return -ESRCH; | ||
267 | } | 221 | } |
268 | 222 | ||
269 | unsigned dnet_addr_type(__le16 addr) | 223 | unsigned dnet_addr_type(__le16 addr) |
@@ -271,7 +225,7 @@ unsigned dnet_addr_type(__le16 addr) | |||
271 | struct flowi fl = { .nl_u = { .dn_u = { .daddr = addr } } }; | 225 | struct flowi fl = { .nl_u = { .dn_u = { .daddr = addr } } }; |
272 | struct dn_fib_res res; | 226 | struct dn_fib_res res; |
273 | unsigned ret = RTN_UNICAST; | 227 | unsigned ret = RTN_UNICAST; |
274 | struct dn_fib_table *tb = dn_fib_tables[RT_TABLE_LOCAL]; | 228 | struct dn_fib_table *tb = dn_fib_get_table(RT_TABLE_LOCAL, 0); |
275 | 229 | ||
276 | res.r = NULL; | 230 | res.r = NULL; |
277 | 231 | ||
@@ -284,142 +238,79 @@ unsigned dnet_addr_type(__le16 addr) | |||
284 | return ret; | 238 | return ret; |
285 | } | 239 | } |
286 | 240 | ||
287 | __le16 dn_fib_rules_policy(__le16 saddr, struct dn_fib_res *res, unsigned *flags) | 241 | static int dn_fib_rule_fill(struct fib_rule *rule, struct sk_buff *skb, |
242 | struct nlmsghdr *nlh, struct fib_rule_hdr *frh) | ||
288 | { | 243 | { |
289 | struct dn_fib_rule *r = res->r; | 244 | struct dn_fib_rule *r = (struct dn_fib_rule *)rule; |
290 | 245 | ||
291 | if (r->r_action == RTN_NAT) { | 246 | frh->family = AF_DECnet; |
292 | int addrtype = dnet_addr_type(r->r_srcmap); | 247 | frh->dst_len = r->dst_len; |
248 | frh->src_len = r->src_len; | ||
249 | frh->tos = 0; | ||
293 | 250 | ||
294 | if (addrtype == RTN_NAT) { | 251 | #ifdef CONFIG_DECNET_ROUTE_FWMARK |
295 | saddr = (saddr&~r->r_srcmask)|r->r_srcmap; | 252 | if (r->fwmark) |
296 | *flags |= RTCF_SNAT; | 253 | NLA_PUT_U32(skb, FRA_FWMARK, r->fwmark); |
297 | } else if (addrtype == RTN_LOCAL || r->r_srcmap == 0) { | 254 | if (r->fwmask || r->fwmark) |
298 | saddr = r->r_srcmap; | 255 | NLA_PUT_U32(skb, FRA_FWMASK, r->fwmask); |
299 | *flags |= RTCF_MASQ; | 256 | #endif |
300 | } | 257 | if (r->dst_len) |
301 | } | 258 | NLA_PUT_U16(skb, FRA_DST, r->dst); |
302 | return saddr; | 259 | if (r->src_len) |
303 | } | 260 | NLA_PUT_U16(skb, FRA_SRC, r->src); |
304 | |||
305 | static void dn_fib_rules_detach(struct net_device *dev) | ||
306 | { | ||
307 | struct hlist_node *node; | ||
308 | struct dn_fib_rule *r; | ||
309 | |||
310 | hlist_for_each_entry(r, node, &dn_fib_rules, r_hlist) { | ||
311 | if (r->r_ifindex == dev->ifindex) | ||
312 | r->r_ifindex = -1; | ||
313 | } | ||
314 | } | ||
315 | 261 | ||
316 | static void dn_fib_rules_attach(struct net_device *dev) | 262 | return 0; |
317 | { | ||
318 | struct hlist_node *node; | ||
319 | struct dn_fib_rule *r; | ||
320 | 263 | ||
321 | hlist_for_each_entry(r, node, &dn_fib_rules, r_hlist) { | 264 | nla_put_failure: |
322 | if (r->r_ifindex == -1 && strcmp(dev->name, r->r_ifname) == 0) | 265 | return -ENOBUFS; |
323 | r->r_ifindex = dev->ifindex; | ||
324 | } | ||
325 | } | 266 | } |
326 | 267 | ||
327 | static int dn_fib_rules_event(struct notifier_block *this, unsigned long event, void *ptr) | 268 | static u32 dn_fib_rule_default_pref(void) |
328 | { | 269 | { |
329 | struct net_device *dev = ptr; | 270 | struct list_head *pos; |
330 | 271 | struct fib_rule *rule; | |
331 | switch(event) { | 272 | |
332 | case NETDEV_UNREGISTER: | 273 | if (!list_empty(&dn_fib_rules)) { |
333 | dn_fib_rules_detach(dev); | 274 | pos = dn_fib_rules.next; |
334 | dn_fib_sync_down(0, dev, 1); | 275 | if (pos->next != &dn_fib_rules) { |
335 | case NETDEV_REGISTER: | 276 | rule = list_entry(pos->next, struct fib_rule, list); |
336 | dn_fib_rules_attach(dev); | 277 | if (rule->pref) |
337 | dn_fib_sync_up(dev); | 278 | return rule->pref - 1; |
279 | } | ||
338 | } | 280 | } |
339 | 281 | ||
340 | return NOTIFY_DONE; | 282 | return 0; |
341 | } | ||
342 | |||
343 | |||
344 | static struct notifier_block dn_fib_rules_notifier = { | ||
345 | .notifier_call = dn_fib_rules_event, | ||
346 | }; | ||
347 | |||
348 | static int dn_fib_fill_rule(struct sk_buff *skb, struct dn_fib_rule *r, | ||
349 | struct netlink_callback *cb, unsigned int flags) | ||
350 | { | ||
351 | struct rtmsg *rtm; | ||
352 | struct nlmsghdr *nlh; | ||
353 | unsigned char *b = skb->tail; | ||
354 | |||
355 | |||
356 | nlh = NLMSG_NEW_ANSWER(skb, cb, RTM_NEWRULE, sizeof(*rtm), flags); | ||
357 | rtm = NLMSG_DATA(nlh); | ||
358 | rtm->rtm_family = AF_DECnet; | ||
359 | rtm->rtm_dst_len = r->r_dst_len; | ||
360 | rtm->rtm_src_len = r->r_src_len; | ||
361 | rtm->rtm_tos = 0; | ||
362 | #ifdef CONFIG_DECNET_ROUTE_FWMARK | ||
363 | if (r->r_fwmark) | ||
364 | RTA_PUT(skb, RTA_PROTOINFO, 4, &r->r_fwmark); | ||
365 | #endif | ||
366 | rtm->rtm_table = r->r_table; | ||
367 | rtm->rtm_protocol = 0; | ||
368 | rtm->rtm_scope = 0; | ||
369 | rtm->rtm_type = r->r_action; | ||
370 | rtm->rtm_flags = r->r_flags; | ||
371 | |||
372 | if (r->r_dst_len) | ||
373 | RTA_PUT(skb, RTA_DST, 2, &r->r_dst); | ||
374 | if (r->r_src_len) | ||
375 | RTA_PUT(skb, RTA_SRC, 2, &r->r_src); | ||
376 | if (r->r_ifname[0]) | ||
377 | RTA_PUT(skb, RTA_IIF, IFNAMSIZ, &r->r_ifname); | ||
378 | if (r->r_preference) | ||
379 | RTA_PUT(skb, RTA_PRIORITY, 4, &r->r_preference); | ||
380 | if (r->r_srcmap) | ||
381 | RTA_PUT(skb, RTA_GATEWAY, 2, &r->r_srcmap); | ||
382 | nlh->nlmsg_len = skb->tail - b; | ||
383 | return skb->len; | ||
384 | |||
385 | nlmsg_failure: | ||
386 | rtattr_failure: | ||
387 | skb_trim(skb, b - skb->data); | ||
388 | return -1; | ||
389 | } | 283 | } |
390 | 284 | ||
391 | int dn_fib_dump_rules(struct sk_buff *skb, struct netlink_callback *cb) | 285 | int dn_fib_dump_rules(struct sk_buff *skb, struct netlink_callback *cb) |
392 | { | 286 | { |
393 | int idx = 0; | 287 | return fib_rules_dump(skb, cb, AF_DECnet); |
394 | int s_idx = cb->args[0]; | ||
395 | struct dn_fib_rule *r; | ||
396 | struct hlist_node *node; | ||
397 | |||
398 | rcu_read_lock(); | ||
399 | hlist_for_each_entry(r, node, &dn_fib_rules, r_hlist) { | ||
400 | if (idx < s_idx) | ||
401 | goto next; | ||
402 | if (dn_fib_fill_rule(skb, r, cb, NLM_F_MULTI) < 0) | ||
403 | break; | ||
404 | next: | ||
405 | idx++; | ||
406 | } | ||
407 | rcu_read_unlock(); | ||
408 | cb->args[0] = idx; | ||
409 | |||
410 | return skb->len; | ||
411 | } | 288 | } |
412 | 289 | ||
290 | static struct fib_rules_ops dn_fib_rules_ops = { | ||
291 | .family = AF_DECnet, | ||
292 | .rule_size = sizeof(struct dn_fib_rule), | ||
293 | .action = dn_fib_rule_action, | ||
294 | .match = dn_fib_rule_match, | ||
295 | .configure = dn_fib_rule_configure, | ||
296 | .compare = dn_fib_rule_compare, | ||
297 | .fill = dn_fib_rule_fill, | ||
298 | .default_pref = dn_fib_rule_default_pref, | ||
299 | .nlgroup = RTNLGRP_DECnet_RULE, | ||
300 | .policy = dn_fib_rule_policy, | ||
301 | .rules_list = &dn_fib_rules, | ||
302 | .owner = THIS_MODULE, | ||
303 | }; | ||
304 | |||
413 | void __init dn_fib_rules_init(void) | 305 | void __init dn_fib_rules_init(void) |
414 | { | 306 | { |
415 | INIT_HLIST_HEAD(&dn_fib_rules); | 307 | list_add_tail(&default_rule.common.list, &dn_fib_rules); |
416 | hlist_add_head(&default_rule.r_hlist, &dn_fib_rules); | 308 | fib_rules_register(&dn_fib_rules_ops); |
417 | register_netdevice_notifier(&dn_fib_rules_notifier); | ||
418 | } | 309 | } |
419 | 310 | ||
420 | void __exit dn_fib_rules_cleanup(void) | 311 | void __exit dn_fib_rules_cleanup(void) |
421 | { | 312 | { |
422 | unregister_netdevice_notifier(&dn_fib_rules_notifier); | 313 | fib_rules_unregister(&dn_fib_rules_ops); |
423 | } | 314 | } |
424 | 315 | ||
425 | 316 | ||