cregit-Linux how code gets into the kernel

Release 4.14 net/core/fib_rules.c

Directory: net/core
/*
 * net/core/fib_rules.c         Generic Routing Rules
 *
 *      This program is free software; you can redistribute it and/or
 *      modify it under the terms of the GNU General Public License as
 *      published by the Free Software Foundation, version 2.
 *
 * Authors:     Thomas Graf <tgraf@suug.ch>
 */

#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>


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; return true; }

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Ido Schimmel91100.00%1100.00%
Total91100.00%1100.00%

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); 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->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; }

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Denis V. Lunev10383.06%240.00%
Stefan Tomanek1411.29%120.00%
Lorenzo Colitti64.84%120.00%
Elena Reshetova10.81%120.00%
Total124100.00%5100.00%

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; }

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Patrick McHardy8498.82%150.00%
Phil Sutter11.18%150.00%
Total85100.00%2100.00%

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; }

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Thomas Graf6491.43%150.00%
Denis V. Lunev68.57%150.00%
Total70100.00%2100.00%


static void rules_ops_put(struct fib_rules_ops *ops) { if (ops) module_put(ops->owner); }

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Thomas Graf22100.00%1100.00%
Total22100.00%1100.00%


static void flush_route_cache(struct fib_rules_ops *ops) { if (ops->flush_cache) ops->flush_cache(ops); }

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Thomas Graf2187.50%150.00%
Denis V. Lunev312.50%150.00%
Total24100.00%2100.00%


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; }

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Thomas Graf12486.11%125.00%
Denis V. Lunev1812.50%250.00%
Eric W. Biedermann21.39%125.00%
Total144100.00%4100.00%


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; }

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Eric W. Biedermann9598.96%150.00%
Patrick McHardy11.04%150.00%
Total96100.00%2100.00%

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); } }

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PersonTokensPropCommitsCommitProp
Thomas Graf4171.93%120.00%
David S. Miller1322.81%120.00%
Stephen Hemminger11.75%120.00%
Daniel Lezcano11.75%120.00%
Denis V. Lunev11.75%120.00%
Total57100.00%5100.00%


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); }

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PersonTokensPropCommitsCommitProp
Thomas Graf2850.91%114.29%
Denis V. Lunev1832.73%342.86%
Américo Wang59.09%114.29%
Eric W. Biedermann47.27%228.57%
Total55100.00%7100.00%

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); }

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Lorenzo Colitti26100.00%1100.00%
Total26100.00%1100.00%


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; }

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Lorenzo Colitti68100.00%1100.00%
Total68100.00%1100.00%


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); }

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Lorenzo Colitti55100.00%1100.00%
Total55100.00%1100.00%


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 = ops->match(rule, fl, flags); out: return (rule->flags & FIB_RULE_INVERT) ? !ret : ret; }

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PersonTokensPropCommitsCommitProp
Thomas Graf11358.55%444.44%
Lorenzo Colitti3116.06%111.11%
David Ahern2613.47%111.11%
Patrick McHardy2010.36%222.22%
David S. Miller31.55%111.11%
Total193100.00%9100.00%


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 = ops->action(rule, fl, flags, arg); if (!err && ops->suppress && ops->suppress(rule, 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; }

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Thomas Graf16278.64%436.36%
Eric Dumazet209.71%218.18%
Stefan Tomanek199.22%19.09%
David Ahern20.97%19.09%
Denis V. Lunev10.49%19.09%
Elena Reshetova10.49%19.09%
Steven Whitehouse10.49%19.09%
Total206100.00%11100.00%

EXPORT_SYMBOL_GPL(fib_rules_lookup);
static int call_fib_rule_notifier(struct notifier_block *nb, struct net *net, enum fib_event_type event_type, struct fib_rule *rule, int family) { struct fib_rule_notifier_info info = { .info.family = family, .rule = rule, }; return call_fib_notifier(nb, net, event_type, &info.info); }

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Ido Schimmel61100.00%1100.00%
Total61100.00%1100.00%


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 fib_rule_notifier_info info = { .info.family = ops->family, .rule = rule, }; ops->fib_rules_seq++; return call_fib_notifiers(net, event_type, &info.info); }

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Ido Schimmel63100.00%1100.00%
Total63100.00%1100.00%

/* Called with rcu_read_lock() */
int fib_rules_dump(struct net *net, struct notifier_block *nb, int family) { struct fib_rules_ops *ops; struct fib_rule *rule; ops = lookup_rules_ops(net, family); if (!ops) return -EAFNOSUPPORT; list_for_each_entry_rcu(rule, &ops->rules_list, list) call_fib_rule_notifier(nb, net, FIB_EVENT_RULE_ADD, rule, family); rules_ops_put(ops); return 0; }

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Ido Schimmel75100.00%1100.00%
Total75100.00%1100.00%

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; }

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Ido Schimmel57100.00%1100.00%
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EXPORT_SYMBOL_GPL(fib_rules_seq_read);
static int validate_rulemsg(struct fib_rule_hdr *frh, struct nlattr **tb, struct fib_rules_ops *ops) { int err = -EINVAL; if (frh->src_len) if (tb[FRA_SRC] == NULL || frh->src_len > (ops->addr_size * 8) || nla_len(tb[FRA_SRC]) != ops->addr_size) goto errout; if (frh->dst_len) if (tb[FRA_DST] == NULL || frh->dst_len > (ops->addr_size * 8) || nla_len(tb[FRA_DST]) != ops->addr_size) goto errout; err = 0; errout: return err; }

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Thomas Graf121100.00%1100.00%
Total121100.00%1100.00%


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->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 (!ops->compare(r, frh, tb)) continue; return 1; } return 0; }

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Mateusz Bajorski18383.94%150.00%
Lorenzo Colitti3516.06%150.00%
Total218100.00%2100.00%


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, *r, *last = NULL; struct nlattr *tb[FRA_MAX+1]; int err = -EINVAL, unresolved = 0; if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*frh))) goto errout; ops = lookup_rules_ops(net, frh->family); if (ops == NULL) { err = -EAFNOSUPPORT; goto errout; } err = nlmsg_parse(nlh, sizeof(*frh), tb, FRA_MAX, ops->policy, extack); if (err < 0) goto errout; err = validate_rulemsg(frh, tb, ops); if (err < 0) goto errout; rule = kzalloc(ops->rule_size, GFP_KERNEL); if (rule == NULL) { err = -ENOMEM; goto errout; } refcount_set(&rule->refcnt, 1); rule->fr_net = net; rule->pref = tb[FRA_PRIORITY] ? nla_get_u32(tb[FRA_PRIORITY]) : fib_default_rule_pref(ops); if (tb[FRA_IIFNAME]) { struct net_device *dev; rule->iifindex = -1; nla_strlcpy(rule->iifname, tb[FRA_IIFNAME], IFNAMSIZ); dev = __dev_get_by_name(net, rule->iifname); if (dev) rule->iifindex = dev->ifindex; } if (tb[FRA_OIFNAME]) { struct net_device *dev; rule->oifindex = -1; nla_strlcpy(rule->oifname, tb[FRA_OIFNAME], IFNAMSIZ); dev = __dev_get_by_name(net, rule->oifname); if (dev) rule->oifindex = dev->ifindex; } if (tb[FRA_FWMARK]) { rule->mark = nla_get_u32(tb[FRA_FWMARK]); if (rule->mark) /* compatibility: if the mark value is non-zero all bits * are compared unless a mask is explicitly specified. */ rule->mark_mask = 0xFFFFFFFF; } if (tb[FRA_FWMASK]) rule->mark_mask = nla_get_u32(tb[FRA_FWMASK]); if (tb[FRA_TUN_ID]) rule->tun_id = nla_get_be64(tb[FRA_TUN_ID]); err = -EINVAL; if (tb[FRA_L3MDEV]) { #ifdef CONFIG_NET_L3_MASTER_DEV rule->l3mdev = nla_get_u8(tb[FRA_L3MDEV]); if (rule->l3mdev != 1) #endif goto errout_free; } rule->action = frh->action; rule->flags = frh->flags; rule->table = frh_get_table(frh, tb); if (tb[FRA_SUPPRESS_PREFIXLEN]) rule->suppress_prefixlen = nla_get_u32(tb[FRA_SUPPRESS_PREFIXLEN]); else rule->suppress_prefixlen = -1; if (tb[FRA_SUPPRESS_IFGROUP]) rule->suppress_ifgroup = nla_get_u32(tb[FRA_SUPPRESS_IFGROUP]); else rule->suppress_ifgroup = -1; if (tb[FRA_GOTO]) { if (rule->action != FR_ACT_GOTO) goto errout_free; rule->target = nla_get_u32(tb[FRA_GOTO]); /* Backward jumps are prohibited to avoid endless loops */ if (rule->target <= rule->pref) 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; } else if (rule->action == FR_ACT_GOTO) goto errout_free; if (rule->l3mdev && rule->table) goto errout_free; if (tb[FRA_UID_RANGE]) { if (current_user_ns() != net->user_ns) { err = -EPERM; goto errout_free; } rule->uid_range = nla_get_kuid_range(tb); if (!uid_range_set(&rule->uid_range) || !uid_lte(rule->uid_range.start, rule->uid_range.end)) goto errout_free; } else { rule->uid_range = fib_kuid_range_unset; } 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); if (err < 0) goto errout_free; 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(); call_fib_rule_notifiers(net, FIB_EVENT_RULE_ADD, rule, ops); 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; }

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PersonTokensPropCommitsCommitProp
Thomas Graf62261.16%824.24%
Lorenzo Colitti767.47%13.03%
Patrick McHardy706.88%412.12%
David Ahern666.49%39.09%
Stefan Tomanek525.11%39.09%
Eric Dumazet434.23%26.06%
Mateusz Bajorski313.05%13.03%
Eric W. Biedermann121.18%26.06%
Ido Schimmel111.08%13.03%
Denis V. Lunev111.08%39.09%
Phil Sutter100.98%13.03%
Wei Yongjun50.49%13.03%
Gao Feng40.39%13.03%
Hideaki Yoshifuji / 吉藤英明30.29%13.03%
Johannes Berg10.10%13.03%
Total1017100.00%33100.00%

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, *r; struct nlattr *tb[FRA_MAX+1]; struct fib_kuid_range range; int err = -EINVAL; if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*frh))) goto errout; ops = lookup_rules_ops(net, frh->family); if (ops == NULL) { err = -EAFNOSUPPORT; goto errout; } err = nlmsg_parse(nlh, sizeof(*frh), tb, FRA_MAX, ops->policy, extack); if (err < 0) goto errout; err = validate_rulemsg(frh, tb, ops); if (err < 0) goto errout; if (tb[FRA_UID_RANGE]) { range = nla_get_kuid_range(tb); if (!uid_range_set(&range)) { err = -EINVAL; goto errout; } } else { range = fib_kuid_range_unset; } list_for_each_entry(rule, &ops->rules_list, list) { if (frh->action && (frh->action != rule->action)) continue; if (frh_get_table(frh, tb) && (frh_get_table(frh, tb) != rule->table)) continue; if (tb[FRA_PRIORITY] && (rule->pref != nla_get_u32(tb[FRA_PRIORITY]))) continue; if (tb[FRA_IIFNAME] && nla_strcmp(tb[FRA_IIFNAME], rule->iifname)) continue; if (tb[FRA_OIFNAME] && nla_strcmp(tb[FRA_OIFNAME], rule->oifname)) continue; if (tb[FRA_FWMARK] && (rule->mark != nla_get_u32(tb[FRA_FWMARK]))) continue; if (tb[FRA_FWMASK] && (rule->mark_mask != nla_get_u32(tb[FRA_FWMASK]))) continue; if (tb[FRA_TUN_ID] && (rule->tun_id != nla_get_be64(tb[FRA_TUN_ID]))) continue; if (tb[FRA_L3MDEV] && (rule->l3mdev != nla_get_u8(tb[FRA_L3MDEV]))) continue; if (uid_range_set(&range) && (!uid_eq(rule->uid_range.start, range.start) || !uid_eq(rule->uid_range.end, range.end))) continue; if (!ops->compare(rule, frh, tb)) continue; 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); notify_rule_change(RTM_DELRULE, rule, ops, nlh, NETLINK_CB(skb).portid); fib_rule_put(rule); flush_route_cache(ops); rules_ops_put(ops); return 0; } err = -ENOENT; errout: rules_ops_put(ops); return err; }

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PersonTokensPropCommitsCommitProp
Thomas Graf43961.66%725.93%
Lorenzo Colitti7810.96%13.70%
Serhey Popovych527.30%13.70%
Patrick McHardy294.07%414.81%
David Ahern283.93%27.41%
Alexander Duyck243.37%13.70%
Zheng Yan182.53%13.70%
Denis V. Lunev131.83%311.11%
Ido Schimmel111.54%13.70%
Wei Yongjun70.98%13.70%
Andreas Henriksson50.70%13.70%
Eric Dumazet30.42%13.70%
Hideaki Yoshifuji / 吉藤英明30.42%13.70%
Johannes Berg10.14%13.70%
Eric W. Biedermann10.14%13.70%
Total712100.00%27100.00%

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)); if (ops->nlmsg_payload) payload += ops->nlmsg_payload(rule); return payload; }

Contributors

PersonTokensPropCommitsCommitProp
Thomas Graf8072.73%222.22%
Stefan Tomanek1210.91%333.33%
Lorenzo Colitti109.09%111.11%
Patrick McHardy76.36%222.22%
Nicolas Dichtel10.91%111.11%
Total110100.00%9100.00%


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; 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 (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))) 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; }

Contributors

PersonTokensPropCommitsCommitProp
Thomas Graf27158.03%525.00%
Patrick McHardy6213.28%525.00%
David S. Miller469.85%15.00%
Stefan Tomanek439.21%315.00%
Lorenzo Colitti204.28%15.00%
David Ahern173.64%15.00%
Johannes Berg30.64%15.00%
Eric Dumazet30.64%210.00%
Nicolas Dichtel20.43%15.00%
Total467100.00%20100.00%


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; }

Contributors

PersonTokensPropCommitsCommitProp
Thomas Graf10282.93%228.57%
Wilson Kok129.76%114.29%
Eric Dumazet75.69%228.57%
Eric W. Biedermann10.81%114.29%
Denis V. Lunev10.81%114.29%
Total123100.00%7100.00%


static int fib_nl_dumprule(struct sk_buff *skb, struct netlink_callback *cb) { struct net *net = sock_net(skb->sk); struct fib_rules_ops *ops; int idx = 0, family; family = rtnl_msg_family(cb->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; }

Contributors

PersonTokensPropCommitsCommitProp
Thomas Graf15188.30%233.33%
Denis V. Lunev127.02%233.33%
Wilson Kok52.92%116.67%
Hideaki Yoshifuji / 吉藤英明31.75%116.67%
Total171100.00%6100.00%


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 = -ENOBUFS; 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); }

Contributors

PersonTokensPropCommitsCommitProp
Thomas Graf11976.77%337.50%
Patrick McHardy2012.90%112.50%
Denis V. Lunev159.68%337.50%
Pablo Neira Ayuso10.65%112.50%
Total155100.00%8100.00%


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; } }

Contributors

PersonTokensPropCommitsCommitProp
Thomas Graf5863.74%133.33%
Patrick McHardy3336.26%266.67%
Total91100.00%3100.00%


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; } }

Contributors

PersonTokensPropCommitsCommitProp
Thomas Graf4467.69%133.33%
Patrick McHardy2132.31%266.67%
Total65100.00%3100.00%


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; }

Contributors

PersonTokensPropCommitsCommitProp
Thomas Graf7757.46%112.50%
Maciej Żenczykowski3425.37%112.50%
Denis V. Lunev139.70%225.00%
Eric Dumazet32.24%112.50%
Hideaki Yoshifuji / 吉藤英明32.24%112.50%
Jiri Pirko32.24%112.50%
Eric W. Biedermann10.75%112.50%
Total134100.00%8100.00%

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; }

Contributors

PersonTokensPropCommitsCommitProp
Denis V. Lunev3096.77%150.00%
Alexey Dobriyan13.23%150.00%
Total31100.00%2100.00%

static struct pernet_operations fib_rules_net_ops = { .init = fib_rules_net_init, };
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; }

Contributors

PersonTokensPropCommitsCommitProp
Denis V. Lunev6452.46%114.29%
Thomas Graf4637.70%342.86%
Eric W. Biedermann64.92%114.29%
Greg Rose32.46%114.29%
Florian Westphal32.46%114.29%
Total122100.00%7100.00%

subsys_initcall(fib_rules_init);

Overall Contributors

PersonTokensPropCommitsCommitProp
Thomas Graf277952.86%1416.47%
Lorenzo Colitti4248.07%22.35%
Ido Schimmel3857.32%22.35%
Patrick McHardy3476.60%89.41%
Denis V. Lunev3266.20%910.59%
Mateusz Bajorski2144.07%11.18%
David Ahern1492.83%33.53%
Stefan Tomanek1402.66%33.53%
Eric W. Biedermann1282.43%67.06%
Eric Dumazet791.50%89.41%
David S. Miller621.18%33.53%
Serhey Popovych520.99%11.18%
Maciej Żenczykowski340.65%11.18%
Alexander Duyck240.46%11.18%
Zheng Yan180.34%11.18%
Wilson Kok170.32%11.18%
Wei Yongjun120.23%11.18%
Hideaki Yoshifuji / 吉藤英明120.23%22.35%
Phil Sutter110.21%11.18%
Johannes Berg50.10%22.35%
Américo Wang50.10%11.18%
Andreas Henriksson50.10%11.18%
Gao Feng40.08%11.18%
Greg Rose30.06%11.18%
Florian Westphal30.06%11.18%
Jiri Pirko30.06%11.18%
Paul Gortmaker30.06%11.18%
Nicolas Dichtel30.06%11.18%
Tejun Heo30.06%11.18%
Elena Reshetova20.04%11.18%
Pablo Neira Ayuso10.02%11.18%
Steven Whitehouse10.02%11.18%
Daniel Lezcano10.02%11.18%
Alexey Dobriyan10.02%11.18%
Stephen Hemminger10.02%11.18%
Total5257100.00%85100.00%
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