mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
1319 lines
31 KiB
1319 lines
31 KiB
// SPDX-License-Identifier: GPL-2.0-only |
|
/* |
|
* net/core/fib_rules.c Generic Routing Rules |
|
* |
|
* Authors: Thomas Graf <[email protected]> |
|
*/ |
|
|
|
#include <linux/types.h> |
|
#include <linux/kernel.h> |
|
#include <linux/slab.h> |
|
#include <linux/list.h> |
|
#include <linux/module.h> |
|
#include <net/net_namespace.h> |
|
#include <net/sock.h> |
|
#include <net/fib_rules.h> |
|
#include <net/ip_tunnels.h> |
|
#include <linux/indirect_call_wrapper.h> |
|
|
|
#if defined(CONFIG_IPV6) && defined(CONFIG_IPV6_MULTIPLE_TABLES) |
|
#ifdef CONFIG_IP_MULTIPLE_TABLES |
|
#define INDIRECT_CALL_MT(f, f2, f1, ...) \ |
|
INDIRECT_CALL_INET(f, f2, f1, __VA_ARGS__) |
|
#else |
|
#define INDIRECT_CALL_MT(f, f2, f1, ...) INDIRECT_CALL_1(f, f2, __VA_ARGS__) |
|
#endif |
|
#elif defined(CONFIG_IP_MULTIPLE_TABLES) |
|
#define INDIRECT_CALL_MT(f, f2, f1, ...) INDIRECT_CALL_1(f, f1, __VA_ARGS__) |
|
#else |
|
#define INDIRECT_CALL_MT(f, f2, f1, ...) f(__VA_ARGS__) |
|
#endif |
|
|
|
static const struct fib_kuid_range fib_kuid_range_unset = { |
|
KUIDT_INIT(0), |
|
KUIDT_INIT(~0), |
|
}; |
|
|
|
bool fib_rule_matchall(const struct fib_rule *rule) |
|
{ |
|
if (rule->iifindex || rule->oifindex || rule->mark || rule->tun_id || |
|
rule->flags) |
|
return false; |
|
if (rule->suppress_ifgroup != -1 || rule->suppress_prefixlen != -1) |
|
return false; |
|
if (!uid_eq(rule->uid_range.start, fib_kuid_range_unset.start) || |
|
!uid_eq(rule->uid_range.end, fib_kuid_range_unset.end)) |
|
return false; |
|
if (fib_rule_port_range_set(&rule->sport_range)) |
|
return false; |
|
if (fib_rule_port_range_set(&rule->dport_range)) |
|
return false; |
|
return true; |
|
} |
|
EXPORT_SYMBOL_GPL(fib_rule_matchall); |
|
|
|
int fib_default_rule_add(struct fib_rules_ops *ops, |
|
u32 pref, u32 table, u32 flags) |
|
{ |
|
struct fib_rule *r; |
|
|
|
r = kzalloc(ops->rule_size, GFP_KERNEL_ACCOUNT); |
|
if (r == NULL) |
|
return -ENOMEM; |
|
|
|
refcount_set(&r->refcnt, 1); |
|
r->action = FR_ACT_TO_TBL; |
|
r->pref = pref; |
|
r->table = table; |
|
r->flags = flags; |
|
r->proto = RTPROT_KERNEL; |
|
r->fr_net = ops->fro_net; |
|
r->uid_range = fib_kuid_range_unset; |
|
|
|
r->suppress_prefixlen = -1; |
|
r->suppress_ifgroup = -1; |
|
|
|
/* The lock is not required here, the list in unreacheable |
|
* at the moment this function is called */ |
|
list_add_tail(&r->list, &ops->rules_list); |
|
return 0; |
|
} |
|
EXPORT_SYMBOL(fib_default_rule_add); |
|
|
|
static u32 fib_default_rule_pref(struct fib_rules_ops *ops) |
|
{ |
|
struct list_head *pos; |
|
struct fib_rule *rule; |
|
|
|
if (!list_empty(&ops->rules_list)) { |
|
pos = ops->rules_list.next; |
|
if (pos->next != &ops->rules_list) { |
|
rule = list_entry(pos->next, struct fib_rule, list); |
|
if (rule->pref) |
|
return rule->pref - 1; |
|
} |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static void notify_rule_change(int event, struct fib_rule *rule, |
|
struct fib_rules_ops *ops, struct nlmsghdr *nlh, |
|
u32 pid); |
|
|
|
static struct fib_rules_ops *lookup_rules_ops(struct net *net, int family) |
|
{ |
|
struct fib_rules_ops *ops; |
|
|
|
rcu_read_lock(); |
|
list_for_each_entry_rcu(ops, &net->rules_ops, list) { |
|
if (ops->family == family) { |
|
if (!try_module_get(ops->owner)) |
|
ops = NULL; |
|
rcu_read_unlock(); |
|
return ops; |
|
} |
|
} |
|
rcu_read_unlock(); |
|
|
|
return NULL; |
|
} |
|
|
|
static void rules_ops_put(struct fib_rules_ops *ops) |
|
{ |
|
if (ops) |
|
module_put(ops->owner); |
|
} |
|
|
|
static void flush_route_cache(struct fib_rules_ops *ops) |
|
{ |
|
if (ops->flush_cache) |
|
ops->flush_cache(ops); |
|
} |
|
|
|
static int __fib_rules_register(struct fib_rules_ops *ops) |
|
{ |
|
int err = -EEXIST; |
|
struct fib_rules_ops *o; |
|
struct net *net; |
|
|
|
net = ops->fro_net; |
|
|
|
if (ops->rule_size < sizeof(struct fib_rule)) |
|
return -EINVAL; |
|
|
|
if (ops->match == NULL || ops->configure == NULL || |
|
ops->compare == NULL || ops->fill == NULL || |
|
ops->action == NULL) |
|
return -EINVAL; |
|
|
|
spin_lock(&net->rules_mod_lock); |
|
list_for_each_entry(o, &net->rules_ops, list) |
|
if (ops->family == o->family) |
|
goto errout; |
|
|
|
list_add_tail_rcu(&ops->list, &net->rules_ops); |
|
err = 0; |
|
errout: |
|
spin_unlock(&net->rules_mod_lock); |
|
|
|
return err; |
|
} |
|
|
|
struct fib_rules_ops * |
|
fib_rules_register(const struct fib_rules_ops *tmpl, struct net *net) |
|
{ |
|
struct fib_rules_ops *ops; |
|
int err; |
|
|
|
ops = kmemdup(tmpl, sizeof(*ops), GFP_KERNEL); |
|
if (ops == NULL) |
|
return ERR_PTR(-ENOMEM); |
|
|
|
INIT_LIST_HEAD(&ops->rules_list); |
|
ops->fro_net = net; |
|
|
|
err = __fib_rules_register(ops); |
|
if (err) { |
|
kfree(ops); |
|
ops = ERR_PTR(err); |
|
} |
|
|
|
return ops; |
|
} |
|
EXPORT_SYMBOL_GPL(fib_rules_register); |
|
|
|
static void fib_rules_cleanup_ops(struct fib_rules_ops *ops) |
|
{ |
|
struct fib_rule *rule, *tmp; |
|
|
|
list_for_each_entry_safe(rule, tmp, &ops->rules_list, list) { |
|
list_del_rcu(&rule->list); |
|
if (ops->delete) |
|
ops->delete(rule); |
|
fib_rule_put(rule); |
|
} |
|
} |
|
|
|
void fib_rules_unregister(struct fib_rules_ops *ops) |
|
{ |
|
struct net *net = ops->fro_net; |
|
|
|
spin_lock(&net->rules_mod_lock); |
|
list_del_rcu(&ops->list); |
|
spin_unlock(&net->rules_mod_lock); |
|
|
|
fib_rules_cleanup_ops(ops); |
|
kfree_rcu(ops, rcu); |
|
} |
|
EXPORT_SYMBOL_GPL(fib_rules_unregister); |
|
|
|
static int uid_range_set(struct fib_kuid_range *range) |
|
{ |
|
return uid_valid(range->start) && uid_valid(range->end); |
|
} |
|
|
|
static struct fib_kuid_range nla_get_kuid_range(struct nlattr **tb) |
|
{ |
|
struct fib_rule_uid_range *in; |
|
struct fib_kuid_range out; |
|
|
|
in = (struct fib_rule_uid_range *)nla_data(tb[FRA_UID_RANGE]); |
|
|
|
out.start = make_kuid(current_user_ns(), in->start); |
|
out.end = make_kuid(current_user_ns(), in->end); |
|
|
|
return out; |
|
} |
|
|
|
static int nla_put_uid_range(struct sk_buff *skb, struct fib_kuid_range *range) |
|
{ |
|
struct fib_rule_uid_range out = { |
|
from_kuid_munged(current_user_ns(), range->start), |
|
from_kuid_munged(current_user_ns(), range->end) |
|
}; |
|
|
|
return nla_put(skb, FRA_UID_RANGE, sizeof(out), &out); |
|
} |
|
|
|
static int nla_get_port_range(struct nlattr *pattr, |
|
struct fib_rule_port_range *port_range) |
|
{ |
|
const struct fib_rule_port_range *pr = nla_data(pattr); |
|
|
|
if (!fib_rule_port_range_valid(pr)) |
|
return -EINVAL; |
|
|
|
port_range->start = pr->start; |
|
port_range->end = pr->end; |
|
|
|
return 0; |
|
} |
|
|
|
static int nla_put_port_range(struct sk_buff *skb, int attrtype, |
|
struct fib_rule_port_range *range) |
|
{ |
|
return nla_put(skb, attrtype, sizeof(*range), range); |
|
} |
|
|
|
static int fib_rule_match(struct fib_rule *rule, struct fib_rules_ops *ops, |
|
struct flowi *fl, int flags, |
|
struct fib_lookup_arg *arg) |
|
{ |
|
int ret = 0; |
|
|
|
if (rule->iifindex && (rule->iifindex != fl->flowi_iif)) |
|
goto out; |
|
|
|
if (rule->oifindex && (rule->oifindex != fl->flowi_oif)) |
|
goto out; |
|
|
|
if ((rule->mark ^ fl->flowi_mark) & rule->mark_mask) |
|
goto out; |
|
|
|
if (rule->tun_id && (rule->tun_id != fl->flowi_tun_key.tun_id)) |
|
goto out; |
|
|
|
if (rule->l3mdev && !l3mdev_fib_rule_match(rule->fr_net, fl, arg)) |
|
goto out; |
|
|
|
if (uid_lt(fl->flowi_uid, rule->uid_range.start) || |
|
uid_gt(fl->flowi_uid, rule->uid_range.end)) |
|
goto out; |
|
|
|
ret = INDIRECT_CALL_MT(ops->match, |
|
fib6_rule_match, |
|
fib4_rule_match, |
|
rule, fl, flags); |
|
out: |
|
return (rule->flags & FIB_RULE_INVERT) ? !ret : ret; |
|
} |
|
|
|
int fib_rules_lookup(struct fib_rules_ops *ops, struct flowi *fl, |
|
int flags, struct fib_lookup_arg *arg) |
|
{ |
|
struct fib_rule *rule; |
|
int err; |
|
|
|
rcu_read_lock(); |
|
|
|
list_for_each_entry_rcu(rule, &ops->rules_list, list) { |
|
jumped: |
|
if (!fib_rule_match(rule, ops, fl, flags, arg)) |
|
continue; |
|
|
|
if (rule->action == FR_ACT_GOTO) { |
|
struct fib_rule *target; |
|
|
|
target = rcu_dereference(rule->ctarget); |
|
if (target == NULL) { |
|
continue; |
|
} else { |
|
rule = target; |
|
goto jumped; |
|
} |
|
} else if (rule->action == FR_ACT_NOP) |
|
continue; |
|
else |
|
err = INDIRECT_CALL_MT(ops->action, |
|
fib6_rule_action, |
|
fib4_rule_action, |
|
rule, fl, flags, arg); |
|
|
|
if (!err && ops->suppress && INDIRECT_CALL_MT(ops->suppress, |
|
fib6_rule_suppress, |
|
fib4_rule_suppress, |
|
rule, flags, arg)) |
|
continue; |
|
|
|
if (err != -EAGAIN) { |
|
if ((arg->flags & FIB_LOOKUP_NOREF) || |
|
likely(refcount_inc_not_zero(&rule->refcnt))) { |
|
arg->rule = rule; |
|
goto out; |
|
} |
|
break; |
|
} |
|
} |
|
|
|
err = -ESRCH; |
|
out: |
|
rcu_read_unlock(); |
|
|
|
return err; |
|
} |
|
EXPORT_SYMBOL_GPL(fib_rules_lookup); |
|
|
|
static int call_fib_rule_notifier(struct notifier_block *nb, |
|
enum fib_event_type event_type, |
|
struct fib_rule *rule, int family, |
|
struct netlink_ext_ack *extack) |
|
{ |
|
struct fib_rule_notifier_info info = { |
|
.info.family = family, |
|
.info.extack = extack, |
|
.rule = rule, |
|
}; |
|
|
|
return call_fib_notifier(nb, event_type, &info.info); |
|
} |
|
|
|
static int call_fib_rule_notifiers(struct net *net, |
|
enum fib_event_type event_type, |
|
struct fib_rule *rule, |
|
struct fib_rules_ops *ops, |
|
struct netlink_ext_ack *extack) |
|
{ |
|
struct fib_rule_notifier_info info = { |
|
.info.family = ops->family, |
|
.info.extack = extack, |
|
.rule = rule, |
|
}; |
|
|
|
ops->fib_rules_seq++; |
|
return call_fib_notifiers(net, event_type, &info.info); |
|
} |
|
|
|
/* Called with rcu_read_lock() */ |
|
int fib_rules_dump(struct net *net, struct notifier_block *nb, int family, |
|
struct netlink_ext_ack *extack) |
|
{ |
|
struct fib_rules_ops *ops; |
|
struct fib_rule *rule; |
|
int err = 0; |
|
|
|
ops = lookup_rules_ops(net, family); |
|
if (!ops) |
|
return -EAFNOSUPPORT; |
|
list_for_each_entry_rcu(rule, &ops->rules_list, list) { |
|
err = call_fib_rule_notifier(nb, FIB_EVENT_RULE_ADD, |
|
rule, family, extack); |
|
if (err) |
|
break; |
|
} |
|
rules_ops_put(ops); |
|
|
|
return err; |
|
} |
|
EXPORT_SYMBOL_GPL(fib_rules_dump); |
|
|
|
unsigned int fib_rules_seq_read(struct net *net, int family) |
|
{ |
|
unsigned int fib_rules_seq; |
|
struct fib_rules_ops *ops; |
|
|
|
ASSERT_RTNL(); |
|
|
|
ops = lookup_rules_ops(net, family); |
|
if (!ops) |
|
return 0; |
|
fib_rules_seq = ops->fib_rules_seq; |
|
rules_ops_put(ops); |
|
|
|
return fib_rules_seq; |
|
} |
|
EXPORT_SYMBOL_GPL(fib_rules_seq_read); |
|
|
|
static struct fib_rule *rule_find(struct fib_rules_ops *ops, |
|
struct fib_rule_hdr *frh, |
|
struct nlattr **tb, |
|
struct fib_rule *rule, |
|
bool user_priority) |
|
{ |
|
struct fib_rule *r; |
|
|
|
list_for_each_entry(r, &ops->rules_list, list) { |
|
if (rule->action && r->action != rule->action) |
|
continue; |
|
|
|
if (rule->table && r->table != rule->table) |
|
continue; |
|
|
|
if (user_priority && r->pref != rule->pref) |
|
continue; |
|
|
|
if (rule->iifname[0] && |
|
memcmp(r->iifname, rule->iifname, IFNAMSIZ)) |
|
continue; |
|
|
|
if (rule->oifname[0] && |
|
memcmp(r->oifname, rule->oifname, IFNAMSIZ)) |
|
continue; |
|
|
|
if (rule->mark && r->mark != rule->mark) |
|
continue; |
|
|
|
if (rule->suppress_ifgroup != -1 && |
|
r->suppress_ifgroup != rule->suppress_ifgroup) |
|
continue; |
|
|
|
if (rule->suppress_prefixlen != -1 && |
|
r->suppress_prefixlen != rule->suppress_prefixlen) |
|
continue; |
|
|
|
if (rule->mark_mask && r->mark_mask != rule->mark_mask) |
|
continue; |
|
|
|
if (rule->tun_id && r->tun_id != rule->tun_id) |
|
continue; |
|
|
|
if (r->fr_net != rule->fr_net) |
|
continue; |
|
|
|
if (rule->l3mdev && r->l3mdev != rule->l3mdev) |
|
continue; |
|
|
|
if (uid_range_set(&rule->uid_range) && |
|
(!uid_eq(r->uid_range.start, rule->uid_range.start) || |
|
!uid_eq(r->uid_range.end, rule->uid_range.end))) |
|
continue; |
|
|
|
if (rule->ip_proto && r->ip_proto != rule->ip_proto) |
|
continue; |
|
|
|
if (rule->proto && r->proto != rule->proto) |
|
continue; |
|
|
|
if (fib_rule_port_range_set(&rule->sport_range) && |
|
!fib_rule_port_range_compare(&r->sport_range, |
|
&rule->sport_range)) |
|
continue; |
|
|
|
if (fib_rule_port_range_set(&rule->dport_range) && |
|
!fib_rule_port_range_compare(&r->dport_range, |
|
&rule->dport_range)) |
|
continue; |
|
|
|
if (!ops->compare(r, frh, tb)) |
|
continue; |
|
return r; |
|
} |
|
|
|
return NULL; |
|
} |
|
|
|
#ifdef CONFIG_NET_L3_MASTER_DEV |
|
static int fib_nl2rule_l3mdev(struct nlattr *nla, struct fib_rule *nlrule, |
|
struct netlink_ext_ack *extack) |
|
{ |
|
nlrule->l3mdev = nla_get_u8(nla); |
|
if (nlrule->l3mdev != 1) { |
|
NL_SET_ERR_MSG(extack, "Invalid l3mdev attribute"); |
|
return -1; |
|
} |
|
|
|
return 0; |
|
} |
|
#else |
|
static int fib_nl2rule_l3mdev(struct nlattr *nla, struct fib_rule *nlrule, |
|
struct netlink_ext_ack *extack) |
|
{ |
|
NL_SET_ERR_MSG(extack, "l3mdev support is not enabled in kernel"); |
|
return -1; |
|
} |
|
#endif |
|
|
|
static int fib_nl2rule(struct sk_buff *skb, struct nlmsghdr *nlh, |
|
struct netlink_ext_ack *extack, |
|
struct fib_rules_ops *ops, |
|
struct nlattr *tb[], |
|
struct fib_rule **rule, |
|
bool *user_priority) |
|
{ |
|
struct net *net = sock_net(skb->sk); |
|
struct fib_rule_hdr *frh = nlmsg_data(nlh); |
|
struct fib_rule *nlrule = NULL; |
|
int err = -EINVAL; |
|
|
|
if (frh->src_len) |
|
if (!tb[FRA_SRC] || |
|
frh->src_len > (ops->addr_size * 8) || |
|
nla_len(tb[FRA_SRC]) != ops->addr_size) { |
|
NL_SET_ERR_MSG(extack, "Invalid source address"); |
|
goto errout; |
|
} |
|
|
|
if (frh->dst_len) |
|
if (!tb[FRA_DST] || |
|
frh->dst_len > (ops->addr_size * 8) || |
|
nla_len(tb[FRA_DST]) != ops->addr_size) { |
|
NL_SET_ERR_MSG(extack, "Invalid dst address"); |
|
goto errout; |
|
} |
|
|
|
nlrule = kzalloc(ops->rule_size, GFP_KERNEL_ACCOUNT); |
|
if (!nlrule) { |
|
err = -ENOMEM; |
|
goto errout; |
|
} |
|
refcount_set(&nlrule->refcnt, 1); |
|
nlrule->fr_net = net; |
|
|
|
if (tb[FRA_PRIORITY]) { |
|
nlrule->pref = nla_get_u32(tb[FRA_PRIORITY]); |
|
*user_priority = true; |
|
} else { |
|
nlrule->pref = fib_default_rule_pref(ops); |
|
} |
|
|
|
nlrule->proto = tb[FRA_PROTOCOL] ? |
|
nla_get_u8(tb[FRA_PROTOCOL]) : RTPROT_UNSPEC; |
|
|
|
if (tb[FRA_IIFNAME]) { |
|
struct net_device *dev; |
|
|
|
nlrule->iifindex = -1; |
|
nla_strscpy(nlrule->iifname, tb[FRA_IIFNAME], IFNAMSIZ); |
|
dev = __dev_get_by_name(net, nlrule->iifname); |
|
if (dev) |
|
nlrule->iifindex = dev->ifindex; |
|
} |
|
|
|
if (tb[FRA_OIFNAME]) { |
|
struct net_device *dev; |
|
|
|
nlrule->oifindex = -1; |
|
nla_strscpy(nlrule->oifname, tb[FRA_OIFNAME], IFNAMSIZ); |
|
dev = __dev_get_by_name(net, nlrule->oifname); |
|
if (dev) |
|
nlrule->oifindex = dev->ifindex; |
|
} |
|
|
|
if (tb[FRA_FWMARK]) { |
|
nlrule->mark = nla_get_u32(tb[FRA_FWMARK]); |
|
if (nlrule->mark) |
|
/* compatibility: if the mark value is non-zero all bits |
|
* are compared unless a mask is explicitly specified. |
|
*/ |
|
nlrule->mark_mask = 0xFFFFFFFF; |
|
} |
|
|
|
if (tb[FRA_FWMASK]) |
|
nlrule->mark_mask = nla_get_u32(tb[FRA_FWMASK]); |
|
|
|
if (tb[FRA_TUN_ID]) |
|
nlrule->tun_id = nla_get_be64(tb[FRA_TUN_ID]); |
|
|
|
err = -EINVAL; |
|
if (tb[FRA_L3MDEV] && |
|
fib_nl2rule_l3mdev(tb[FRA_L3MDEV], nlrule, extack) < 0) |
|
goto errout_free; |
|
|
|
nlrule->action = frh->action; |
|
nlrule->flags = frh->flags; |
|
nlrule->table = frh_get_table(frh, tb); |
|
if (tb[FRA_SUPPRESS_PREFIXLEN]) |
|
nlrule->suppress_prefixlen = nla_get_u32(tb[FRA_SUPPRESS_PREFIXLEN]); |
|
else |
|
nlrule->suppress_prefixlen = -1; |
|
|
|
if (tb[FRA_SUPPRESS_IFGROUP]) |
|
nlrule->suppress_ifgroup = nla_get_u32(tb[FRA_SUPPRESS_IFGROUP]); |
|
else |
|
nlrule->suppress_ifgroup = -1; |
|
|
|
if (tb[FRA_GOTO]) { |
|
if (nlrule->action != FR_ACT_GOTO) { |
|
NL_SET_ERR_MSG(extack, "Unexpected goto"); |
|
goto errout_free; |
|
} |
|
|
|
nlrule->target = nla_get_u32(tb[FRA_GOTO]); |
|
/* Backward jumps are prohibited to avoid endless loops */ |
|
if (nlrule->target <= nlrule->pref) { |
|
NL_SET_ERR_MSG(extack, "Backward goto not supported"); |
|
goto errout_free; |
|
} |
|
} else if (nlrule->action == FR_ACT_GOTO) { |
|
NL_SET_ERR_MSG(extack, "Missing goto target for action goto"); |
|
goto errout_free; |
|
} |
|
|
|
if (nlrule->l3mdev && nlrule->table) { |
|
NL_SET_ERR_MSG(extack, "l3mdev and table are mutually exclusive"); |
|
goto errout_free; |
|
} |
|
|
|
if (tb[FRA_UID_RANGE]) { |
|
if (current_user_ns() != net->user_ns) { |
|
err = -EPERM; |
|
NL_SET_ERR_MSG(extack, "No permission to set uid"); |
|
goto errout_free; |
|
} |
|
|
|
nlrule->uid_range = nla_get_kuid_range(tb); |
|
|
|
if (!uid_range_set(&nlrule->uid_range) || |
|
!uid_lte(nlrule->uid_range.start, nlrule->uid_range.end)) { |
|
NL_SET_ERR_MSG(extack, "Invalid uid range"); |
|
goto errout_free; |
|
} |
|
} else { |
|
nlrule->uid_range = fib_kuid_range_unset; |
|
} |
|
|
|
if (tb[FRA_IP_PROTO]) |
|
nlrule->ip_proto = nla_get_u8(tb[FRA_IP_PROTO]); |
|
|
|
if (tb[FRA_SPORT_RANGE]) { |
|
err = nla_get_port_range(tb[FRA_SPORT_RANGE], |
|
&nlrule->sport_range); |
|
if (err) { |
|
NL_SET_ERR_MSG(extack, "Invalid sport range"); |
|
goto errout_free; |
|
} |
|
} |
|
|
|
if (tb[FRA_DPORT_RANGE]) { |
|
err = nla_get_port_range(tb[FRA_DPORT_RANGE], |
|
&nlrule->dport_range); |
|
if (err) { |
|
NL_SET_ERR_MSG(extack, "Invalid dport range"); |
|
goto errout_free; |
|
} |
|
} |
|
|
|
*rule = nlrule; |
|
|
|
return 0; |
|
|
|
errout_free: |
|
kfree(nlrule); |
|
errout: |
|
return err; |
|
} |
|
|
|
static int rule_exists(struct fib_rules_ops *ops, struct fib_rule_hdr *frh, |
|
struct nlattr **tb, struct fib_rule *rule) |
|
{ |
|
struct fib_rule *r; |
|
|
|
list_for_each_entry(r, &ops->rules_list, list) { |
|
if (r->action != rule->action) |
|
continue; |
|
|
|
if (r->table != rule->table) |
|
continue; |
|
|
|
if (r->pref != rule->pref) |
|
continue; |
|
|
|
if (memcmp(r->iifname, rule->iifname, IFNAMSIZ)) |
|
continue; |
|
|
|
if (memcmp(r->oifname, rule->oifname, IFNAMSIZ)) |
|
continue; |
|
|
|
if (r->mark != rule->mark) |
|
continue; |
|
|
|
if (r->suppress_ifgroup != rule->suppress_ifgroup) |
|
continue; |
|
|
|
if (r->suppress_prefixlen != rule->suppress_prefixlen) |
|
continue; |
|
|
|
if (r->mark_mask != rule->mark_mask) |
|
continue; |
|
|
|
if (r->tun_id != rule->tun_id) |
|
continue; |
|
|
|
if (r->fr_net != rule->fr_net) |
|
continue; |
|
|
|
if (r->l3mdev != rule->l3mdev) |
|
continue; |
|
|
|
if (!uid_eq(r->uid_range.start, rule->uid_range.start) || |
|
!uid_eq(r->uid_range.end, rule->uid_range.end)) |
|
continue; |
|
|
|
if (r->ip_proto != rule->ip_proto) |
|
continue; |
|
|
|
if (r->proto != rule->proto) |
|
continue; |
|
|
|
if (!fib_rule_port_range_compare(&r->sport_range, |
|
&rule->sport_range)) |
|
continue; |
|
|
|
if (!fib_rule_port_range_compare(&r->dport_range, |
|
&rule->dport_range)) |
|
continue; |
|
|
|
if (!ops->compare(r, frh, tb)) |
|
continue; |
|
return 1; |
|
} |
|
return 0; |
|
} |
|
|
|
static const struct nla_policy fib_rule_policy[FRA_MAX + 1] = { |
|
[FRA_UNSPEC] = { .strict_start_type = FRA_DPORT_RANGE + 1 }, |
|
[FRA_IIFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ - 1 }, |
|
[FRA_OIFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ - 1 }, |
|
[FRA_PRIORITY] = { .type = NLA_U32 }, |
|
[FRA_FWMARK] = { .type = NLA_U32 }, |
|
[FRA_FLOW] = { .type = NLA_U32 }, |
|
[FRA_TUN_ID] = { .type = NLA_U64 }, |
|
[FRA_FWMASK] = { .type = NLA_U32 }, |
|
[FRA_TABLE] = { .type = NLA_U32 }, |
|
[FRA_SUPPRESS_PREFIXLEN] = { .type = NLA_U32 }, |
|
[FRA_SUPPRESS_IFGROUP] = { .type = NLA_U32 }, |
|
[FRA_GOTO] = { .type = NLA_U32 }, |
|
[FRA_L3MDEV] = { .type = NLA_U8 }, |
|
[FRA_UID_RANGE] = { .len = sizeof(struct fib_rule_uid_range) }, |
|
[FRA_PROTOCOL] = { .type = NLA_U8 }, |
|
[FRA_IP_PROTO] = { .type = NLA_U8 }, |
|
[FRA_SPORT_RANGE] = { .len = sizeof(struct fib_rule_port_range) }, |
|
[FRA_DPORT_RANGE] = { .len = sizeof(struct fib_rule_port_range) } |
|
}; |
|
|
|
int fib_nl_newrule(struct sk_buff *skb, struct nlmsghdr *nlh, |
|
struct netlink_ext_ack *extack) |
|
{ |
|
struct net *net = sock_net(skb->sk); |
|
struct fib_rule_hdr *frh = nlmsg_data(nlh); |
|
struct fib_rules_ops *ops = NULL; |
|
struct fib_rule *rule = NULL, *r, *last = NULL; |
|
struct nlattr *tb[FRA_MAX + 1]; |
|
int err = -EINVAL, unresolved = 0; |
|
bool user_priority = false; |
|
|
|
if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*frh))) { |
|
NL_SET_ERR_MSG(extack, "Invalid msg length"); |
|
goto errout; |
|
} |
|
|
|
ops = lookup_rules_ops(net, frh->family); |
|
if (!ops) { |
|
err = -EAFNOSUPPORT; |
|
NL_SET_ERR_MSG(extack, "Rule family not supported"); |
|
goto errout; |
|
} |
|
|
|
err = nlmsg_parse_deprecated(nlh, sizeof(*frh), tb, FRA_MAX, |
|
fib_rule_policy, extack); |
|
if (err < 0) { |
|
NL_SET_ERR_MSG(extack, "Error parsing msg"); |
|
goto errout; |
|
} |
|
|
|
err = fib_nl2rule(skb, nlh, extack, ops, tb, &rule, &user_priority); |
|
if (err) |
|
goto errout; |
|
|
|
if ((nlh->nlmsg_flags & NLM_F_EXCL) && |
|
rule_exists(ops, frh, tb, rule)) { |
|
err = -EEXIST; |
|
goto errout_free; |
|
} |
|
|
|
err = ops->configure(rule, skb, frh, tb, extack); |
|
if (err < 0) |
|
goto errout_free; |
|
|
|
err = call_fib_rule_notifiers(net, FIB_EVENT_RULE_ADD, rule, ops, |
|
extack); |
|
if (err < 0) |
|
goto errout_free; |
|
|
|
list_for_each_entry(r, &ops->rules_list, list) { |
|
if (r->pref == rule->target) { |
|
RCU_INIT_POINTER(rule->ctarget, r); |
|
break; |
|
} |
|
} |
|
|
|
if (rcu_dereference_protected(rule->ctarget, 1) == NULL) |
|
unresolved = 1; |
|
|
|
list_for_each_entry(r, &ops->rules_list, list) { |
|
if (r->pref > rule->pref) |
|
break; |
|
last = r; |
|
} |
|
|
|
if (last) |
|
list_add_rcu(&rule->list, &last->list); |
|
else |
|
list_add_rcu(&rule->list, &ops->rules_list); |
|
|
|
if (ops->unresolved_rules) { |
|
/* |
|
* There are unresolved goto rules in the list, check if |
|
* any of them are pointing to this new rule. |
|
*/ |
|
list_for_each_entry(r, &ops->rules_list, list) { |
|
if (r->action == FR_ACT_GOTO && |
|
r->target == rule->pref && |
|
rtnl_dereference(r->ctarget) == NULL) { |
|
rcu_assign_pointer(r->ctarget, rule); |
|
if (--ops->unresolved_rules == 0) |
|
break; |
|
} |
|
} |
|
} |
|
|
|
if (rule->action == FR_ACT_GOTO) |
|
ops->nr_goto_rules++; |
|
|
|
if (unresolved) |
|
ops->unresolved_rules++; |
|
|
|
if (rule->tun_id) |
|
ip_tunnel_need_metadata(); |
|
|
|
notify_rule_change(RTM_NEWRULE, rule, ops, nlh, NETLINK_CB(skb).portid); |
|
flush_route_cache(ops); |
|
rules_ops_put(ops); |
|
return 0; |
|
|
|
errout_free: |
|
kfree(rule); |
|
errout: |
|
rules_ops_put(ops); |
|
return err; |
|
} |
|
EXPORT_SYMBOL_GPL(fib_nl_newrule); |
|
|
|
int fib_nl_delrule(struct sk_buff *skb, struct nlmsghdr *nlh, |
|
struct netlink_ext_ack *extack) |
|
{ |
|
struct net *net = sock_net(skb->sk); |
|
struct fib_rule_hdr *frh = nlmsg_data(nlh); |
|
struct fib_rules_ops *ops = NULL; |
|
struct fib_rule *rule = NULL, *r, *nlrule = NULL; |
|
struct nlattr *tb[FRA_MAX+1]; |
|
int err = -EINVAL; |
|
bool user_priority = false; |
|
|
|
if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*frh))) { |
|
NL_SET_ERR_MSG(extack, "Invalid msg length"); |
|
goto errout; |
|
} |
|
|
|
ops = lookup_rules_ops(net, frh->family); |
|
if (ops == NULL) { |
|
err = -EAFNOSUPPORT; |
|
NL_SET_ERR_MSG(extack, "Rule family not supported"); |
|
goto errout; |
|
} |
|
|
|
err = nlmsg_parse_deprecated(nlh, sizeof(*frh), tb, FRA_MAX, |
|
fib_rule_policy, extack); |
|
if (err < 0) { |
|
NL_SET_ERR_MSG(extack, "Error parsing msg"); |
|
goto errout; |
|
} |
|
|
|
err = fib_nl2rule(skb, nlh, extack, ops, tb, &nlrule, &user_priority); |
|
if (err) |
|
goto errout; |
|
|
|
rule = rule_find(ops, frh, tb, nlrule, user_priority); |
|
if (!rule) { |
|
err = -ENOENT; |
|
goto errout; |
|
} |
|
|
|
if (rule->flags & FIB_RULE_PERMANENT) { |
|
err = -EPERM; |
|
goto errout; |
|
} |
|
|
|
if (ops->delete) { |
|
err = ops->delete(rule); |
|
if (err) |
|
goto errout; |
|
} |
|
|
|
if (rule->tun_id) |
|
ip_tunnel_unneed_metadata(); |
|
|
|
list_del_rcu(&rule->list); |
|
|
|
if (rule->action == FR_ACT_GOTO) { |
|
ops->nr_goto_rules--; |
|
if (rtnl_dereference(rule->ctarget) == NULL) |
|
ops->unresolved_rules--; |
|
} |
|
|
|
/* |
|
* Check if this rule is a target to any of them. If so, |
|
* adjust to the next one with the same preference or |
|
* disable them. As this operation is eventually very |
|
* expensive, it is only performed if goto rules, except |
|
* current if it is goto rule, have actually been added. |
|
*/ |
|
if (ops->nr_goto_rules > 0) { |
|
struct fib_rule *n; |
|
|
|
n = list_next_entry(rule, list); |
|
if (&n->list == &ops->rules_list || n->pref != rule->pref) |
|
n = NULL; |
|
list_for_each_entry(r, &ops->rules_list, list) { |
|
if (rtnl_dereference(r->ctarget) != rule) |
|
continue; |
|
rcu_assign_pointer(r->ctarget, n); |
|
if (!n) |
|
ops->unresolved_rules++; |
|
} |
|
} |
|
|
|
call_fib_rule_notifiers(net, FIB_EVENT_RULE_DEL, rule, ops, |
|
NULL); |
|
notify_rule_change(RTM_DELRULE, rule, ops, nlh, |
|
NETLINK_CB(skb).portid); |
|
fib_rule_put(rule); |
|
flush_route_cache(ops); |
|
rules_ops_put(ops); |
|
kfree(nlrule); |
|
return 0; |
|
|
|
errout: |
|
kfree(nlrule); |
|
rules_ops_put(ops); |
|
return err; |
|
} |
|
EXPORT_SYMBOL_GPL(fib_nl_delrule); |
|
|
|
static inline size_t fib_rule_nlmsg_size(struct fib_rules_ops *ops, |
|
struct fib_rule *rule) |
|
{ |
|
size_t payload = NLMSG_ALIGN(sizeof(struct fib_rule_hdr)) |
|
+ nla_total_size(IFNAMSIZ) /* FRA_IIFNAME */ |
|
+ nla_total_size(IFNAMSIZ) /* FRA_OIFNAME */ |
|
+ nla_total_size(4) /* FRA_PRIORITY */ |
|
+ nla_total_size(4) /* FRA_TABLE */ |
|
+ nla_total_size(4) /* FRA_SUPPRESS_PREFIXLEN */ |
|
+ nla_total_size(4) /* FRA_SUPPRESS_IFGROUP */ |
|
+ nla_total_size(4) /* FRA_FWMARK */ |
|
+ nla_total_size(4) /* FRA_FWMASK */ |
|
+ nla_total_size_64bit(8) /* FRA_TUN_ID */ |
|
+ nla_total_size(sizeof(struct fib_kuid_range)) |
|
+ nla_total_size(1) /* FRA_PROTOCOL */ |
|
+ nla_total_size(1) /* FRA_IP_PROTO */ |
|
+ nla_total_size(sizeof(struct fib_rule_port_range)) /* FRA_SPORT_RANGE */ |
|
+ nla_total_size(sizeof(struct fib_rule_port_range)); /* FRA_DPORT_RANGE */ |
|
|
|
if (ops->nlmsg_payload) |
|
payload += ops->nlmsg_payload(rule); |
|
|
|
return payload; |
|
} |
|
|
|
static int fib_nl_fill_rule(struct sk_buff *skb, struct fib_rule *rule, |
|
u32 pid, u32 seq, int type, int flags, |
|
struct fib_rules_ops *ops) |
|
{ |
|
struct nlmsghdr *nlh; |
|
struct fib_rule_hdr *frh; |
|
|
|
nlh = nlmsg_put(skb, pid, seq, type, sizeof(*frh), flags); |
|
if (nlh == NULL) |
|
return -EMSGSIZE; |
|
|
|
frh = nlmsg_data(nlh); |
|
frh->family = ops->family; |
|
frh->table = rule->table < 256 ? rule->table : RT_TABLE_COMPAT; |
|
if (nla_put_u32(skb, FRA_TABLE, rule->table)) |
|
goto nla_put_failure; |
|
if (nla_put_u32(skb, FRA_SUPPRESS_PREFIXLEN, rule->suppress_prefixlen)) |
|
goto nla_put_failure; |
|
frh->res1 = 0; |
|
frh->res2 = 0; |
|
frh->action = rule->action; |
|
frh->flags = rule->flags; |
|
|
|
if (nla_put_u8(skb, FRA_PROTOCOL, rule->proto)) |
|
goto nla_put_failure; |
|
|
|
if (rule->action == FR_ACT_GOTO && |
|
rcu_access_pointer(rule->ctarget) == NULL) |
|
frh->flags |= FIB_RULE_UNRESOLVED; |
|
|
|
if (rule->iifname[0]) { |
|
if (nla_put_string(skb, FRA_IIFNAME, rule->iifname)) |
|
goto nla_put_failure; |
|
if (rule->iifindex == -1) |
|
frh->flags |= FIB_RULE_IIF_DETACHED; |
|
} |
|
|
|
if (rule->oifname[0]) { |
|
if (nla_put_string(skb, FRA_OIFNAME, rule->oifname)) |
|
goto nla_put_failure; |
|
if (rule->oifindex == -1) |
|
frh->flags |= FIB_RULE_OIF_DETACHED; |
|
} |
|
|
|
if ((rule->pref && |
|
nla_put_u32(skb, FRA_PRIORITY, rule->pref)) || |
|
(rule->mark && |
|
nla_put_u32(skb, FRA_FWMARK, rule->mark)) || |
|
((rule->mark_mask || rule->mark) && |
|
nla_put_u32(skb, FRA_FWMASK, rule->mark_mask)) || |
|
(rule->target && |
|
nla_put_u32(skb, FRA_GOTO, rule->target)) || |
|
(rule->tun_id && |
|
nla_put_be64(skb, FRA_TUN_ID, rule->tun_id, FRA_PAD)) || |
|
(rule->l3mdev && |
|
nla_put_u8(skb, FRA_L3MDEV, rule->l3mdev)) || |
|
(uid_range_set(&rule->uid_range) && |
|
nla_put_uid_range(skb, &rule->uid_range)) || |
|
(fib_rule_port_range_set(&rule->sport_range) && |
|
nla_put_port_range(skb, FRA_SPORT_RANGE, &rule->sport_range)) || |
|
(fib_rule_port_range_set(&rule->dport_range) && |
|
nla_put_port_range(skb, FRA_DPORT_RANGE, &rule->dport_range)) || |
|
(rule->ip_proto && nla_put_u8(skb, FRA_IP_PROTO, rule->ip_proto))) |
|
goto nla_put_failure; |
|
|
|
if (rule->suppress_ifgroup != -1) { |
|
if (nla_put_u32(skb, FRA_SUPPRESS_IFGROUP, rule->suppress_ifgroup)) |
|
goto nla_put_failure; |
|
} |
|
|
|
if (ops->fill(rule, skb, frh) < 0) |
|
goto nla_put_failure; |
|
|
|
nlmsg_end(skb, nlh); |
|
return 0; |
|
|
|
nla_put_failure: |
|
nlmsg_cancel(skb, nlh); |
|
return -EMSGSIZE; |
|
} |
|
|
|
static int dump_rules(struct sk_buff *skb, struct netlink_callback *cb, |
|
struct fib_rules_ops *ops) |
|
{ |
|
int idx = 0; |
|
struct fib_rule *rule; |
|
int err = 0; |
|
|
|
rcu_read_lock(); |
|
list_for_each_entry_rcu(rule, &ops->rules_list, list) { |
|
if (idx < cb->args[1]) |
|
goto skip; |
|
|
|
err = fib_nl_fill_rule(skb, rule, NETLINK_CB(cb->skb).portid, |
|
cb->nlh->nlmsg_seq, RTM_NEWRULE, |
|
NLM_F_MULTI, ops); |
|
if (err) |
|
break; |
|
skip: |
|
idx++; |
|
} |
|
rcu_read_unlock(); |
|
cb->args[1] = idx; |
|
rules_ops_put(ops); |
|
|
|
return err; |
|
} |
|
|
|
static int fib_valid_dumprule_req(const struct nlmsghdr *nlh, |
|
struct netlink_ext_ack *extack) |
|
{ |
|
struct fib_rule_hdr *frh; |
|
|
|
if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*frh))) { |
|
NL_SET_ERR_MSG(extack, "Invalid header for fib rule dump request"); |
|
return -EINVAL; |
|
} |
|
|
|
frh = nlmsg_data(nlh); |
|
if (frh->dst_len || frh->src_len || frh->tos || frh->table || |
|
frh->res1 || frh->res2 || frh->action || frh->flags) { |
|
NL_SET_ERR_MSG(extack, |
|
"Invalid values in header for fib rule dump request"); |
|
return -EINVAL; |
|
} |
|
|
|
if (nlmsg_attrlen(nlh, sizeof(*frh))) { |
|
NL_SET_ERR_MSG(extack, "Invalid data after header in fib rule dump request"); |
|
return -EINVAL; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int fib_nl_dumprule(struct sk_buff *skb, struct netlink_callback *cb) |
|
{ |
|
const struct nlmsghdr *nlh = cb->nlh; |
|
struct net *net = sock_net(skb->sk); |
|
struct fib_rules_ops *ops; |
|
int idx = 0, family; |
|
|
|
if (cb->strict_check) { |
|
int err = fib_valid_dumprule_req(nlh, cb->extack); |
|
|
|
if (err < 0) |
|
return err; |
|
} |
|
|
|
family = rtnl_msg_family(nlh); |
|
if (family != AF_UNSPEC) { |
|
/* Protocol specific dump request */ |
|
ops = lookup_rules_ops(net, family); |
|
if (ops == NULL) |
|
return -EAFNOSUPPORT; |
|
|
|
dump_rules(skb, cb, ops); |
|
|
|
return skb->len; |
|
} |
|
|
|
rcu_read_lock(); |
|
list_for_each_entry_rcu(ops, &net->rules_ops, list) { |
|
if (idx < cb->args[0] || !try_module_get(ops->owner)) |
|
goto skip; |
|
|
|
if (dump_rules(skb, cb, ops) < 0) |
|
break; |
|
|
|
cb->args[1] = 0; |
|
skip: |
|
idx++; |
|
} |
|
rcu_read_unlock(); |
|
cb->args[0] = idx; |
|
|
|
return skb->len; |
|
} |
|
|
|
static void notify_rule_change(int event, struct fib_rule *rule, |
|
struct fib_rules_ops *ops, struct nlmsghdr *nlh, |
|
u32 pid) |
|
{ |
|
struct net *net; |
|
struct sk_buff *skb; |
|
int err = -ENOMEM; |
|
|
|
net = ops->fro_net; |
|
skb = nlmsg_new(fib_rule_nlmsg_size(ops, rule), GFP_KERNEL); |
|
if (skb == NULL) |
|
goto errout; |
|
|
|
err = fib_nl_fill_rule(skb, rule, pid, nlh->nlmsg_seq, event, 0, ops); |
|
if (err < 0) { |
|
/* -EMSGSIZE implies BUG in fib_rule_nlmsg_size() */ |
|
WARN_ON(err == -EMSGSIZE); |
|
kfree_skb(skb); |
|
goto errout; |
|
} |
|
|
|
rtnl_notify(skb, net, pid, ops->nlgroup, nlh, GFP_KERNEL); |
|
return; |
|
errout: |
|
if (err < 0) |
|
rtnl_set_sk_err(net, ops->nlgroup, err); |
|
} |
|
|
|
static void attach_rules(struct list_head *rules, struct net_device *dev) |
|
{ |
|
struct fib_rule *rule; |
|
|
|
list_for_each_entry(rule, rules, list) { |
|
if (rule->iifindex == -1 && |
|
strcmp(dev->name, rule->iifname) == 0) |
|
rule->iifindex = dev->ifindex; |
|
if (rule->oifindex == -1 && |
|
strcmp(dev->name, rule->oifname) == 0) |
|
rule->oifindex = dev->ifindex; |
|
} |
|
} |
|
|
|
static void detach_rules(struct list_head *rules, struct net_device *dev) |
|
{ |
|
struct fib_rule *rule; |
|
|
|
list_for_each_entry(rule, rules, list) { |
|
if (rule->iifindex == dev->ifindex) |
|
rule->iifindex = -1; |
|
if (rule->oifindex == dev->ifindex) |
|
rule->oifindex = -1; |
|
} |
|
} |
|
|
|
|
|
static int fib_rules_event(struct notifier_block *this, unsigned long event, |
|
void *ptr) |
|
{ |
|
struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
|
struct net *net = dev_net(dev); |
|
struct fib_rules_ops *ops; |
|
|
|
ASSERT_RTNL(); |
|
|
|
switch (event) { |
|
case NETDEV_REGISTER: |
|
list_for_each_entry(ops, &net->rules_ops, list) |
|
attach_rules(&ops->rules_list, dev); |
|
break; |
|
|
|
case NETDEV_CHANGENAME: |
|
list_for_each_entry(ops, &net->rules_ops, list) { |
|
detach_rules(&ops->rules_list, dev); |
|
attach_rules(&ops->rules_list, dev); |
|
} |
|
break; |
|
|
|
case NETDEV_UNREGISTER: |
|
list_for_each_entry(ops, &net->rules_ops, list) |
|
detach_rules(&ops->rules_list, dev); |
|
break; |
|
} |
|
|
|
return NOTIFY_DONE; |
|
} |
|
|
|
static struct notifier_block fib_rules_notifier = { |
|
.notifier_call = fib_rules_event, |
|
}; |
|
|
|
static int __net_init fib_rules_net_init(struct net *net) |
|
{ |
|
INIT_LIST_HEAD(&net->rules_ops); |
|
spin_lock_init(&net->rules_mod_lock); |
|
return 0; |
|
} |
|
|
|
static void __net_exit fib_rules_net_exit(struct net *net) |
|
{ |
|
WARN_ON_ONCE(!list_empty(&net->rules_ops)); |
|
} |
|
|
|
static struct pernet_operations fib_rules_net_ops = { |
|
.init = fib_rules_net_init, |
|
.exit = fib_rules_net_exit, |
|
}; |
|
|
|
static int __init fib_rules_init(void) |
|
{ |
|
int err; |
|
rtnl_register(PF_UNSPEC, RTM_NEWRULE, fib_nl_newrule, NULL, 0); |
|
rtnl_register(PF_UNSPEC, RTM_DELRULE, fib_nl_delrule, NULL, 0); |
|
rtnl_register(PF_UNSPEC, RTM_GETRULE, NULL, fib_nl_dumprule, 0); |
|
|
|
err = register_pernet_subsys(&fib_rules_net_ops); |
|
if (err < 0) |
|
goto fail; |
|
|
|
err = register_netdevice_notifier(&fib_rules_notifier); |
|
if (err < 0) |
|
goto fail_unregister; |
|
|
|
return 0; |
|
|
|
fail_unregister: |
|
unregister_pernet_subsys(&fib_rules_net_ops); |
|
fail: |
|
rtnl_unregister(PF_UNSPEC, RTM_NEWRULE); |
|
rtnl_unregister(PF_UNSPEC, RTM_DELRULE); |
|
rtnl_unregister(PF_UNSPEC, RTM_GETRULE); |
|
return err; |
|
} |
|
|
|
subsys_initcall(fib_rules_init);
|
|
|