cregit-Linux how code gets into the kernel

Release 4.11 net/sched/act_api.c

Directory: net/sched
/*
 * net/sched/act_api.c  Packet action API.
 *
 *              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; either version
 *              2 of the License, or (at your option) any later version.
 *
 * Author:      Jamal Hadi Salim
 *
 *
 */

#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/skbuff.h>
#include <linux/init.h>
#include <linux/kmod.h>
#include <linux/err.h>
#include <linux/module.h>
#include <net/net_namespace.h>
#include <net/sock.h>
#include <net/sch_generic.h>
#include <net/pkt_cls.h>
#include <net/act_api.h>
#include <net/netlink.h>


static void free_tcf(struct rcu_head *head) { struct tc_action *p = container_of(head, struct tc_action, tcfa_rcu); free_percpu(p->cpu_bstats); free_percpu(p->cpu_qstats); if (p->act_cookie) { kfree(p->act_cookie->data); kfree(p->act_cookie); } kfree(p); }

Contributors

PersonTokensPropCommitsCommitProp
Eric Dumazet4260.87%133.33%
Jamal Hadi Salim2434.78%133.33%
Américo Wang34.35%133.33%
Total69100.00%3100.00%


static void tcf_hash_destroy(struct tcf_hashinfo *hinfo, struct tc_action *p) { spin_lock_bh(&hinfo->lock); hlist_del(&p->tcfa_head); spin_unlock_bh(&hinfo->lock); gen_kill_estimator(&p->tcfa_rate_est); /* * gen_estimator est_timer() might access p->tcfa_lock * or bstats, wait a RCU grace period before freeing p */ call_rcu(&p->tcfa_rcu, free_tcf); }

Contributors

PersonTokensPropCommitsCommitProp
David S. Miller3152.54%112.50%
Américo Wang2237.29%562.50%
Eric Dumazet58.47%112.50%
Alexei Starovoitov11.69%112.50%
Total59100.00%8100.00%


int __tcf_hash_release(struct tc_action *p, bool bind, bool strict) { int ret = 0; if (p) { if (bind) p->tcfa_bindcnt--; else if (strict && p->tcfa_bindcnt > 0) return -EPERM; p->tcfa_refcnt--; if (p->tcfa_bindcnt <= 0 && p->tcfa_refcnt <= 0) { if (p->ops->cleanup) p->ops->cleanup(p, bind); tcf_hash_destroy(p->hinfo, p); ret = ACT_P_DELETED; } } return ret; }

Contributors

PersonTokensPropCommitsCommitProp
David S. Miller5652.34%112.50%
Américo Wang4441.12%675.00%
Daniel Borkmann76.54%112.50%
Total107100.00%8100.00%

EXPORT_SYMBOL(__tcf_hash_release);
static int tcf_dump_walker(struct tcf_hashinfo *hinfo, struct sk_buff *skb, struct netlink_callback *cb) { int err = 0, index = -1, i = 0, s_i = 0, n_i = 0; struct nlattr *nest; spin_lock_bh(&hinfo->lock); s_i = cb->args[0]; for (i = 0; i < (hinfo->hmask + 1); i++) { struct hlist_head *head; struct tc_action *p; head = &hinfo->htab[tcf_hash(i, hinfo->hmask)]; hlist_for_each_entry_rcu(p, head, tcfa_head) { index++; if (index < s_i) continue; nest = nla_nest_start(skb, n_i); if (nest == NULL) goto nla_put_failure; err = tcf_action_dump_1(skb, p, 0, 0); if (err < 0) { index--; nlmsg_trim(skb, nest); goto done; } nla_nest_end(skb, nest); n_i++; if (n_i >= TCA_ACT_MAX_PRIO) goto done; } } done: spin_unlock_bh(&hinfo->lock); if (n_i) cb->args[0] += n_i; return n_i; nla_put_failure: nla_nest_cancel(skb, nest); goto done; }

Contributors

PersonTokensPropCommitsCommitProp
David S. Miller18476.03%18.33%
Américo Wang3313.64%650.00%
Patrick McHardy208.26%216.67%
Arnaldo Carvalho de Melo31.24%216.67%
Jamal Hadi Salim20.83%18.33%
Total242100.00%12100.00%


static int tcf_del_walker(struct tcf_hashinfo *hinfo, struct sk_buff *skb, const struct tc_action_ops *ops) { struct nlattr *nest; int i = 0, n_i = 0; int ret = -EINVAL; nest = nla_nest_start(skb, 0); if (nest == NULL) goto nla_put_failure; if (nla_put_string(skb, TCA_KIND, ops->kind)) goto nla_put_failure; for (i = 0; i < (hinfo->hmask + 1); i++) { struct hlist_head *head; struct hlist_node *n; struct tc_action *p; head = &hinfo->htab[tcf_hash(i, hinfo->hmask)]; hlist_for_each_entry_safe(p, n, head, tcfa_head) { ret = __tcf_hash_release(p, false, true); if (ret == ACT_P_DELETED) { module_put(p->ops->owner); n_i++; } else if (ret < 0) goto nla_put_failure; } } if (nla_put_u32(skb, TCA_FCNT, n_i)) goto nla_put_failure; nla_nest_end(skb, nest); return n_i; nla_put_failure: nla_nest_cancel(skb, nest); return ret; }

Contributors

PersonTokensPropCommitsCommitProp
David S. Miller12657.80%215.38%
Américo Wang6529.82%646.15%
Patrick McHardy198.72%215.38%
Daniel Borkmann41.83%17.69%
Jamal Hadi Salim20.92%17.69%
Arnaldo Carvalho de Melo20.92%17.69%
Total218100.00%13100.00%


int tcf_generic_walker(struct tc_action_net *tn, struct sk_buff *skb, struct netlink_callback *cb, int type, const struct tc_action_ops *ops) { struct tcf_hashinfo *hinfo = tn->hinfo; if (type == RTM_DELACTION) { return tcf_del_walker(hinfo, skb, ops); } else if (type == RTM_GETACTION) { return tcf_dump_walker(hinfo, skb, cb); } else { WARN(1, "tcf_generic_walker: unknown action %d\n", type); return -EINVAL; } }

Contributors

PersonTokensPropCommitsCommitProp
David S. Miller6672.53%125.00%
Américo Wang2224.18%250.00%
Stephen Hemminger33.30%125.00%
Total91100.00%4100.00%

EXPORT_SYMBOL(tcf_generic_walker);
static struct tc_action *tcf_hash_lookup(u32 index, struct tcf_hashinfo *hinfo) { struct tc_action *p = NULL; struct hlist_head *head; spin_lock_bh(&hinfo->lock); head = &hinfo->htab[tcf_hash(index, hinfo->hmask)]; hlist_for_each_entry_rcu(p, head, tcfa_head) if (p->tcfa_index == index) break; spin_unlock_bh(&hinfo->lock); return p; }

Contributors

PersonTokensPropCommitsCommitProp
David S. Miller5567.90%120.00%
Américo Wang2632.10%480.00%
Total81100.00%5100.00%


u32 tcf_hash_new_index(struct tc_action_net *tn) { struct tcf_hashinfo *hinfo = tn->hinfo; u32 val = hinfo->index; do { if (++val == 0) val = 1; } while (tcf_hash_lookup(val, hinfo)); hinfo->index = val; return val; }

Contributors

PersonTokensPropCommitsCommitProp
David S. Miller3966.10%125.00%
Américo Wang1728.81%250.00%
Yang Yingliang35.08%125.00%
Total59100.00%4100.00%

EXPORT_SYMBOL(tcf_hash_new_index);
int tcf_hash_search(struct tc_action_net *tn, struct tc_action **a, u32 index) { struct tcf_hashinfo *hinfo = tn->hinfo; struct tc_action *p = tcf_hash_lookup(index, hinfo); if (p) { *a = p; return 1; } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
David S. Miller4782.46%125.00%
Américo Wang1017.54%375.00%
Total57100.00%4100.00%

EXPORT_SYMBOL(tcf_hash_search);
bool tcf_hash_check(struct tc_action_net *tn, u32 index, struct tc_action **a, int bind) { struct tcf_hashinfo *hinfo = tn->hinfo; struct tc_action *p = NULL; if (index && (p = tcf_hash_lookup(index, hinfo)) != NULL) { if (bind) p->tcfa_bindcnt++; p->tcfa_refcnt++; *a = p; return true; } return false; }

Contributors

PersonTokensPropCommitsCommitProp
David S. Miller5971.95%114.29%
Américo Wang2328.05%685.71%
Total82100.00%7100.00%

EXPORT_SYMBOL(tcf_hash_check);
void tcf_hash_cleanup(struct tc_action *a, struct nlattr *est) { if (est) gen_kill_estimator(&a->tcfa_rate_est); call_rcu(&a->tcfa_rcu, free_tcf); }

Contributors

PersonTokensPropCommitsCommitProp
Américo Wang3286.49%266.67%
Eric Dumazet513.51%133.33%
Total37100.00%3100.00%

EXPORT_SYMBOL(tcf_hash_cleanup);
int tcf_hash_create(struct tc_action_net *tn, u32 index, struct nlattr *est, struct tc_action **a, const struct tc_action_ops *ops, int bind, bool cpustats) { struct tc_action *p = kzalloc(ops->size, GFP_KERNEL); struct tcf_hashinfo *hinfo = tn->hinfo; int err = -ENOMEM; if (unlikely(!p)) return -ENOMEM; p->tcfa_refcnt = 1; if (bind) p->tcfa_bindcnt = 1; if (cpustats) { p->cpu_bstats = netdev_alloc_pcpu_stats(struct gnet_stats_basic_cpu); if (!p->cpu_bstats) { err1: kfree(p); return err; } p->cpu_qstats = alloc_percpu(struct gnet_stats_queue); if (!p->cpu_qstats) { err2: free_percpu(p->cpu_bstats); goto err1; } } spin_lock_init(&p->tcfa_lock); INIT_HLIST_NODE(&p->tcfa_head); p->tcfa_index = index ? index : tcf_hash_new_index(tn); p->tcfa_tm.install = jiffies; p->tcfa_tm.lastuse = jiffies; p->tcfa_tm.firstuse = 0; if (est) { err = gen_new_estimator(&p->tcfa_bstats, p->cpu_bstats, &p->tcfa_rate_est, &p->tcfa_lock, NULL, est); if (err) { free_percpu(p->cpu_qstats); goto err2; } } p->hinfo = hinfo; p->ops = ops; INIT_LIST_HEAD(&p->list); *a = p; return 0; }

Contributors

PersonTokensPropCommitsCommitProp
David S. Miller10937.59%16.67%
Eric Dumazet8830.34%213.33%
Américo Wang6723.10%640.00%
Stephen Hemminger144.83%16.67%
Jamal Hadi Salim93.10%213.33%
Patrick McHardy20.69%213.33%
John Fastabend10.34%16.67%
Total290100.00%15100.00%

EXPORT_SYMBOL(tcf_hash_create);
void tcf_hash_insert(struct tc_action_net *tn, struct tc_action *a) { struct tcf_hashinfo *hinfo = tn->hinfo; unsigned int h = tcf_hash(a->tcfa_index, hinfo->hmask); spin_lock_bh(&hinfo->lock); hlist_add_head(&a->tcfa_head, &hinfo->htab[h]); spin_unlock_bh(&hinfo->lock); }

Contributors

PersonTokensPropCommitsCommitProp
David S. Miller4056.34%114.29%
Américo Wang3042.25%571.43%
Jamal Hadi Salim11.41%114.29%
Total71100.00%7100.00%

EXPORT_SYMBOL(tcf_hash_insert);
void tcf_hashinfo_destroy(const struct tc_action_ops *ops, struct tcf_hashinfo *hinfo) { int i; for (i = 0; i < hinfo->hmask + 1; i++) { struct tc_action *p; struct hlist_node *n; hlist_for_each_entry_safe(p, n, &hinfo->htab[i], tcfa_head) { int ret; ret = __tcf_hash_release(p, false, true); if (ret == ACT_P_DELETED) module_put(ops->owner); else if (ret < 0) return; } } kfree(hinfo->htab); }

Contributors

PersonTokensPropCommitsCommitProp
Américo Wang102100.00%4100.00%
Total102100.00%4100.00%

EXPORT_SYMBOL(tcf_hashinfo_destroy); static LIST_HEAD(act_base); static DEFINE_RWLOCK(act_mod_lock);
int tcf_register_action(struct tc_action_ops *act, struct pernet_operations *ops) { struct tc_action_ops *a; int ret; if (!act->act || !act->dump || !act->init || !act->walk || !act->lookup) return -EINVAL; /* We have to register pernet ops before making the action ops visible, * otherwise tcf_action_init_1() could get a partially initialized * netns. */ ret = register_pernet_subsys(ops); if (ret) return ret; write_lock(&act_mod_lock); list_for_each_entry(a, &act_base, head) { if (act->type == a->type || (strcmp(act->kind, a->kind) == 0)) { write_unlock(&act_mod_lock); unregister_pernet_subsys(ops); return -EEXIST; } } list_add_tail(&act->head, &act_base); write_unlock(&act_mod_lock); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Jamal Hadi Salim9262.59%450.00%
Américo Wang5537.41%450.00%
Total147100.00%8100.00%

EXPORT_SYMBOL(tcf_register_action);
int tcf_unregister_action(struct tc_action_ops *act, struct pernet_operations *ops) { struct tc_action_ops *a; int err = -ENOENT; write_lock(&act_mod_lock); list_for_each_entry(a, &act_base, head) { if (a == act) { list_del(&act->head); err = 0; break; } } write_unlock(&act_mod_lock); if (!err) unregister_pernet_subsys(ops); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Jamal Hadi Salim5060.98%120.00%
Américo Wang2935.37%360.00%
Eric Dumazet33.66%120.00%
Total82100.00%5100.00%

EXPORT_SYMBOL(tcf_unregister_action); /* lookup by name */
static struct tc_action_ops *tc_lookup_action_n(char *kind) { struct tc_action_ops *a, *res = NULL; if (kind) { read_lock(&act_mod_lock); list_for_each_entry(a, &act_base, head) { if (strcmp(kind, a->kind) == 0) { if (try_module_get(a->owner)) res = a; break; } } read_unlock(&act_mod_lock); } return res; }

Contributors

PersonTokensPropCommitsCommitProp
Jamal Hadi Salim6680.49%240.00%
Américo Wang89.76%120.00%
Eric Dumazet78.54%120.00%
Patrick McHardy11.22%120.00%
Total82100.00%5100.00%

/* lookup by nlattr */
static struct tc_action_ops *tc_lookup_action(struct nlattr *kind) { struct tc_action_ops *a, *res = NULL; if (kind) { read_lock(&act_mod_lock); list_for_each_entry(a, &act_base, head) { if (nla_strcmp(kind, a->kind) == 0) { if (try_module_get(a->owner)) res = a; break; } } read_unlock(&act_mod_lock); } return res; }

Contributors

PersonTokensPropCommitsCommitProp
Jamal Hadi Salim6578.31%233.33%
Américo Wang89.64%116.67%
Eric Dumazet78.43%116.67%
Patrick McHardy33.61%233.33%
Total83100.00%6100.00%


int tcf_action_exec(struct sk_buff *skb, struct tc_action **actions, int nr_actions, struct tcf_result *res) { int ret = -1, i; if (skb_skip_tc_classify(skb)) return TC_ACT_OK; for (i = 0; i < nr_actions; i++) { const struct tc_action *a = actions[i]; repeat: ret = a->ops->act(skb, a, res); if (ret == TC_ACT_REPEAT) goto repeat; /* we need a ttl - JHS */ if (ret != TC_ACT_PIPE) break; } return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Jamal Hadi Salim6158.10%228.57%
Américo Wang3230.48%228.57%
Willem de Bruijn54.76%114.29%
David S. Miller54.76%114.29%
Patrick McHardy21.90%114.29%
Total105100.00%7100.00%

EXPORT_SYMBOL(tcf_action_exec);
int tcf_action_destroy(struct list_head *actions, int bind) { struct tc_action *a, *tmp; int ret = 0; list_for_each_entry_safe(a, tmp, actions, list) { ret = __tcf_hash_release(a, bind, true); if (ret == ACT_P_DELETED) module_put(a->ops->owner); else if (ret < 0) return ret; } return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Américo Wang4051.95%233.33%
Jamal Hadi Salim3241.56%233.33%
Daniel Borkmann33.90%116.67%
Patrick McHardy22.60%116.67%
Total77100.00%6100.00%


int tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int bind, int ref) { return a->ops->dump(skb, a, bind, ref); }

Contributors

PersonTokensPropCommitsCommitProp
Jamal Hadi Salim37100.00%1100.00%
Total37100.00%1100.00%


int tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int bind, int ref) { int err = -EINVAL; unsigned char *b = skb_tail_pointer(skb); struct nlattr *nest; if (nla_put_string(skb, TCA_KIND, a->ops->kind)) goto nla_put_failure; if (tcf_action_copy_stats(skb, a, 0)) goto nla_put_failure; if (a->act_cookie) { if (nla_put(skb, TCA_ACT_COOKIE, a->act_cookie->len, a->act_cookie->data)) goto nla_put_failure; } nest = nla_nest_start(skb, TCA_OPTIONS); if (nest == NULL) goto nla_put_failure; err = tcf_action_dump_old(skb, a, bind, ref); if (err > 0) { nla_nest_end(skb, nest); return err; } nla_put_failure: nlmsg_trim(skb, b); return -1; }

Contributors

PersonTokensPropCommitsCommitProp
Jamal Hadi Salim13580.36%222.22%
Patrick McHardy169.52%222.22%
Arnaldo Carvalho de Melo63.57%222.22%
David S. Miller52.98%111.11%
Eric Dumazet42.38%111.11%
Thomas Graf21.19%111.11%
Total168100.00%9100.00%

EXPORT_SYMBOL(tcf_action_dump_1);
int tcf_action_dump(struct sk_buff *skb, struct list_head *actions, int bind, int ref) { struct tc_action *a; int err = -EINVAL; struct nlattr *nest; list_for_each_entry(a, actions, list) { nest = nla_nest_start(skb, a->order); if (nest == NULL) goto nla_put_failure; err = tcf_action_dump_1(skb, a, bind, ref); if (err < 0) goto errout; nla_nest_end(skb, nest); } return 0; nla_put_failure: err = -EINVAL; errout: nla_nest_cancel(skb, nest); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Jamal Hadi Salim7664.41%225.00%
Patrick McHardy2218.64%337.50%
Américo Wang108.47%112.50%
Thomas Graf86.78%112.50%
Arnaldo Carvalho de Melo21.69%112.50%
Total118100.00%8100.00%


static struct tc_cookie *nla_memdup_cookie(struct nlattr **tb) { struct tc_cookie *c = kzalloc(sizeof(*c), GFP_KERNEL); if (!c) return NULL; c->data = nla_memdup(tb[TCA_ACT_COOKIE], GFP_KERNEL); if (!c->data) { kfree(c); return NULL; } c->len = nla_len(tb[TCA_ACT_COOKIE]); return c; }

Contributors

PersonTokensPropCommitsCommitProp
Jamal Hadi Salim6577.38%133.33%
Wolfgang Bumiller1821.43%133.33%
Wei Yongjun11.19%133.33%
Total84100.00%3100.00%


struct tc_action *tcf_action_init_1(struct net *net, struct nlattr *nla, struct nlattr *est, char *name, int ovr, int bind) { struct tc_action *a; struct tc_action_ops *a_o; struct tc_cookie *cookie = NULL; char act_name[IFNAMSIZ]; struct nlattr *tb[TCA_ACT_MAX + 1]; struct nlattr *kind; int err; if (name == NULL) { err = nla_parse_nested(tb, TCA_ACT_MAX, nla, NULL); if (err < 0) goto err_out; err = -EINVAL; kind = tb[TCA_ACT_KIND]; if (kind == NULL) goto err_out; if (nla_strlcpy(act_name, kind, IFNAMSIZ) >= IFNAMSIZ) goto err_out; if (tb[TCA_ACT_COOKIE]) { int cklen = nla_len(tb[TCA_ACT_COOKIE]); if (cklen > TC_COOKIE_MAX_SIZE) goto err_out; cookie = nla_memdup_cookie(tb); if (!cookie) { err = -ENOMEM; goto err_out; } } } else { err = -EINVAL; if (strlcpy(act_name, name, IFNAMSIZ) >= IFNAMSIZ) goto err_out; } a_o = tc_lookup_action_n(act_name); if (a_o == NULL) { #ifdef CONFIG_MODULES rtnl_unlock(); request_module("act_%s", act_name); rtnl_lock(); a_o = tc_lookup_action_n(act_name); /* We dropped the RTNL semaphore in order to * perform the module load. So, even if we * succeeded in loading the module we have to * tell the caller to replay the request. We * indicate this using -EAGAIN. */ if (a_o != NULL) { err = -EAGAIN; goto err_mod; } #endif err = -ENOENT; goto err_out; } /* backward compatibility for policer */ if (name == NULL) err = a_o->init(net, tb[TCA_ACT_OPTIONS], est, &a, ovr, bind); else err = a_o->init(net, nla, est, &a, ovr, bind); if (err < 0) goto err_mod; if (name == NULL && tb[TCA_ACT_COOKIE]) { if (a->act_cookie) { kfree(a->act_cookie->data); kfree(a->act_cookie); } a->act_cookie = cookie; } /* module count goes up only when brand new policy is created * if it exists and is only bound to in a_o->init() then * ACT_P_CREATED is not returned (a zero is). */ if (err != ACT_P_CREATED) module_put(a_o->owner); return a; err_mod: module_put(a_o->owner); err_out: if (cookie) { kfree(cookie->data); kfree(cookie); } return ERR_PTR(err); }

Contributors

PersonTokensPropCommitsCommitProp
Jamal Hadi Salim21850.11%315.79%
Patrick McHardy10123.22%947.37%
Wolfgang Bumiller9622.07%15.26%
Benjamin LaHaise92.07%15.26%
Thomas Graf51.15%15.26%
Américo Wang30.69%15.26%
Eric Dumazet10.23%15.26%
Roman Mashak10.23%15.26%
Johannes Berg10.23%15.26%
Total435100.00%19100.00%


static void cleanup_a(struct list_head *actions, int ovr) { struct tc_action *a; if (!ovr) return; list_for_each_entry(a, actions, list) a->tcfa_refcnt--; }

Contributors

PersonTokensPropCommitsCommitProp
Jamal Hadi Salim38100.00%1100.00%
Total38100.00%1100.00%


int tcf_action_init(struct net *net, struct nlattr *nla, struct nlattr *est, char *name, int ovr, int bind, struct list_head *actions) { struct nlattr *tb[TCA_ACT_MAX_PRIO + 1]; struct tc_action *act; int err; int i; err = nla_parse_nested(tb, TCA_ACT_MAX_PRIO, nla, NULL); if (err < 0) return err; for (i = 1; i <= TCA_ACT_MAX_PRIO && tb[i]; i++) { act = tcf_action_init_1(net, tb[i], est, name, ovr, bind); if (IS_ERR(act)) { err = PTR_ERR(act); goto err; } act->order = i; if (ovr) act->tcfa_refcnt++; list_add_tail(&act->list, actions); } /* Remove the temp refcnt which was necessary to protect against * destroying an existing action which was being replaced */ cleanup_a(actions, ovr); return 0; err: tcf_action_destroy(actions, bind); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Jamal Hadi Salim11361.08%222.22%
Patrick McHardy4021.62%555.56%
Américo Wang2513.51%111.11%
Benjamin LaHaise73.78%111.11%
Total185100.00%9100.00%


int tcf_action_copy_stats(struct sk_buff *skb, struct tc_action *p, int compat_mode) { int err = 0; struct gnet_dump d; if (p == NULL) goto errout; /* compat_mode being true specifies a call that is supposed * to add additional backward compatibility statistic TLVs. */ if (compat_mode) { if (p->type == TCA_OLD_COMPAT) err = gnet_stats_start_copy_compat(skb, 0, TCA_STATS, TCA_XSTATS, &p->tcfa_lock, &d, TCA_PAD); else return 0; } else err = gnet_stats_start_copy(skb, TCA_ACT_STATS, &p->tcfa_lock, &d, TCA_ACT_PAD); if (err < 0) goto errout; if (gnet_stats_copy_basic(NULL, &d, p->cpu_bstats, &p->tcfa_bstats) < 0 || gnet_stats_copy_rate_est(&d, &p->tcfa_rate_est) < 0 || gnet_stats_copy_queue(&d, p->cpu_qstats, &p->tcfa_qstats, p->tcfa_qstats.qlen) < 0) goto errout; if (gnet_stats_finish_copy(&d) < 0) goto errout; return 0; errout: return -1; }

Contributors

PersonTokensPropCommitsCommitProp
Thomas Graf13470.90%425.00%
Jamal Hadi Salim178.99%16.25%
Américo Wang147.41%212.50%
Eric Dumazet84.23%212.50%
John Fastabend73.70%318.75%
Nicolas Dichtel42.12%16.25%
Patrick McHardy42.12%212.50%
Dirk Hohndel10.53%16.25%
Total189100.00%16100.00%


static int tca_get_fill(struct sk_buff *skb, struct list_head *actions, u32 portid, u32 seq, u16 flags, int event, int bind, int ref) { struct tcamsg *t; struct nlmsghdr *nlh; unsigned char *b = skb_tail_pointer(skb); struct nlattr *nest; nlh = nlmsg_put(skb, portid, seq, event, sizeof(*t), flags); if (!nlh) goto out_nlmsg_trim; t = nlmsg_data(nlh); t->tca_family = AF_UNSPEC; t->tca__pad1 = 0; t->tca__pad2 = 0; nest = nla_nest_start(skb, TCA_ACT_TAB); if (nest == NULL) goto out_nlmsg_trim; if (tcf_action_dump(skb, actions, bind, ref) < 0) goto out_nlmsg_trim; nla_nest_end(skb, nest); nlh->nlmsg_len = skb_tail_pointer(skb) - b; return skb->len; out_nlmsg_trim: nlmsg_trim(skb, b); return -1; }

Contributors

PersonTokensPropCommitsCommitProp
Jamal Hadi Salim12969.73%218.18%
Patrick McHardy2915.68%436.36%
David S. Miller137.03%19.09%
Arnaldo Carvalho de Melo94.86%218.18%
Américo Wang31.62%19.09%
Eric W. Biedermann21.08%19.09%
Total185100.00%11100.00%


static int act_get_notify(struct net *net, u32 portid, struct nlmsghdr *n, struct list_head *actions, int event) { struct sk_buff *skb; skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); if (!skb) return -ENOBUFS; if (tca_get_fill(skb, actions, portid, n->nlmsg_seq, 0, event, 0, 0) <= 0) { kfree_skb(skb); return -EINVAL; } return rtnl_unicast(skb, net, portid); }

Contributors

PersonTokensPropCommitsCommitProp
Jamal Hadi Salim8184.38%116.67%
Thomas Goff66.25%116.67%
Eric W. Biedermann33.12%116.67%
Américo Wang33.12%116.67%
Thomas Graf22.08%116.67%
Denis V. Lunev11.04%116.67%
Total96100.00%6100.00%


static struct tc_action *tcf_action_get_1(struct net *net, struct nlattr *nla, struct nlmsghdr *n, u32 portid) { struct nlattr *tb[TCA_ACT_MAX + 1]; const struct tc_action_ops *ops; struct tc_action *a; int index; int err; err = nla_parse_nested(tb, TCA_ACT_MAX, nla, NULL); if (err < 0) goto err_out; err = -EINVAL; if (tb[TCA_ACT_INDEX] == NULL || nla_len(tb[TCA_ACT_INDEX]) < sizeof(index)) goto err_out; index = nla_get_u32(tb[TCA_ACT_INDEX]); err = -EINVAL; ops = tc_lookup_action(tb[TCA_ACT_KIND]); if (!ops) /* could happen in batch of actions */ goto err_out; err = -ENOENT; if (ops->lookup(net, &a, index) == 0) goto err_mod; module_put(ops->owner); return a; err_mod: module_put(ops->owner); err_out: return ERR_PTR(err); }

Contributors

PersonTokensPropCommitsCommitProp
Patrick McHardy9047.37%857.14%
Jamal Hadi Salim8343.68%321.43%
Américo Wang168.42%214.29%
Eric W. Biedermann10.53%17.14%
Total190100.00%14100.00%


static int tca_action_flush(struct net *net, struct nlattr *nla, struct nlmsghdr *n, u32 portid) { struct sk_buff *skb; unsigned char *b; struct nlmsghdr *nlh; struct tcamsg *t; struct netlink_callback dcb; struct nlattr *nest; struct nlattr *tb[TCA_ACT_MAX + 1]; const struct tc_action_ops *ops; struct nlattr *kind; int err = -ENOMEM; skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); if (!skb) { pr_debug("tca_action_flush: failed skb alloc\n"); return err; } b = skb_tail_pointer(skb); err = nla_parse_nested(tb, TCA_ACT_MAX, nla, NULL); if (err < 0) goto err_out; err = -EINVAL; kind = tb[TCA_ACT_KIND]; ops = tc_lookup_action(kind); if (!ops) /*some idjot trying to flush unknown action */ goto err_out; nlh = nlmsg_put(skb, portid, n->nlmsg_seq, RTM_DELACTION, sizeof(*t), 0); if (!nlh) goto out_module_put; t = nlmsg_data(nlh); t->tca_family = AF_UNSPEC; t->tca__pad1 = 0; t->tca__pad2 = 0; nest = nla_nest_start(skb, TCA_ACT_TAB); if (nest == NULL) goto out_module_put; err = ops->walk(net, skb, &dcb, RTM_DELACTION, ops); if (err <= 0) goto out_module_put; nla_nest_end(skb, nest); nlh->nlmsg_len = skb_tail_pointer(skb) - b; nlh->nlmsg_flags |= NLM_F_ROOT; module_put(ops->owner); err = rtnetlink_send(skb, net, portid, RTNLGRP_TC, n->nlmsg_flags & NLM_F_ECHO); if (err > 0) return 0; return err; out_module_put: module_put(ops->owner); err_out: kfree_skb(skb); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Jamal Hadi Salim24270.55%521.74%
Patrick McHardy5516.03%834.78%
David S. Miller154.37%14.35%
Américo Wang102.92%28.70%
Arnaldo Carvalho de Melo82.33%14.35%
Thomas Goff61.75%14.35%
Eric W. Biedermann30.87%14.35%
Thomas Graf10.29%14.35%
Denis V. Lunev10.29%14.35%
Stephen Hemminger10.29%14.35%
Roman Mashak10.29%14.35%
Total343100.00%23100.00%


static int tcf_del_notify(struct net *net, struct nlmsghdr *n, struct list_head *actions, u32 portid) { int ret; struct sk_buff *skb; skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); if (!skb) return -ENOBUFS; if (tca_get_fill(skb, actions, portid, n->nlmsg_seq, 0, RTM_DELACTION, 0, 1) <= 0) { kfree_skb(skb); return -EINVAL; } /* now do the delete */ ret = tcf_action_destroy(actions, 0); if (ret < 0) { kfree_skb(skb); return ret; } ret = rtnetlink_send(skb, net, portid, RTNLGRP_TC, n->nlmsg_flags & NLM_F_ECHO); if (ret > 0) return 0; return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Américo Wang14198.60%250.00%
Patrick McHardy10.70%125.00%
Jamal Hadi Salim10.70%125.00%
Total143100.00%4100.00%


static int tca_action_gd(struct net *net, struct nlattr *nla, struct nlmsghdr *n, u32 portid, int event) { int i, ret; struct nlattr *tb[TCA_ACT_MAX_PRIO + 1]; struct tc_action *act; LIST_HEAD(actions); ret = nla_parse_nested(tb, TCA_ACT_MAX_PRIO, nla, NULL); if (ret < 0) return ret; if (event == RTM_DELACTION && n->nlmsg_flags & NLM_F_ROOT) { if (tb[1] != NULL) return tca_action_flush(net, tb[1], n, portid); else return -EINVAL; } for (i = 1; i <= TCA_ACT_MAX_PRIO && tb[i]; i++) { act = tcf_action_get_1(net, tb[i], n, portid); if (IS_ERR(act)) { ret = PTR_ERR(act); goto err; } act->order = i; list_add_tail(&act->list, &actions); } if (event == RTM_GETACTION) ret = act_get_notify(net, portid, n, &actions, event); else { /* delete */ ret = tcf_del_notify(net, n, &actions, portid); if (ret) goto err; return ret; } err: if (event != RTM_GETACTION) tcf_action_destroy(&actions, 0); return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Jamal Hadi Salim15158.53%320.00%
Patrick McHardy6224.03%640.00%
Américo Wang3112.02%426.67%
Thomas Goff93.49%16.67%
Eric W. Biedermann51.94%16.67%
Total258100.00%15100.00%


static int tcf_add_notify(struct net *net, struct nlmsghdr *n, struct list_head *actions, u32 portid) { struct sk_buff *skb; int err = 0; skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); if (!skb) return -ENOBUFS; if (tca_get_fill(skb, actions, portid, n->nlmsg_seq, n->nlmsg_flags, RTM_NEWACTION, 0, 0) <= 0) { kfree_skb(skb); return -EINVAL; } err = rtnetlink_send(skb, net, portid, RTNLGRP_TC, n->nlmsg_flags & NLM_F_ECHO); if (err > 0) err = 0; return err; }

Contributors

PersonTokensPropCommitsCommitProp
Jamal Hadi Salim7964.75%216.67%
Américo Wang2822.95%216.67%
Thomas Goff64.92%18.33%
Patrick McHardy43.28%433.33%
Eric W. Biedermann21.64%18.33%
Arnaldo Carvalho de Melo21.64%18.33%
Denis V. Lunev10.82%18.33%
Total122100.00%12100.00%


static int tcf_action_add(struct net *net, struct nlattr *nla, struct nlmsghdr *n, u32 portid, int ovr) { int ret = 0; LIST_HEAD(actions); ret = tcf_action_init(net, nla, NULL, NULL, ovr, 0, &actions); if (ret) return ret; return tcf_add_notify(net, n, &actions, portid); }

Contributors

PersonTokensPropCommitsCommitProp
Jamal Hadi Salim4457.14%110.00%
Américo Wang1722.08%330.00%
Thomas Goff79.09%110.00%
Patrick McHardy56.49%330.00%
Eric W. Biedermann22.60%110.00%
Benjamin LaHaise22.60%110.00%
Total77100.00%10100.00%


static int tc_ctl_action(struct sk_buff *skb, struct nlmsghdr *n) { struct net *net = sock_net(skb->sk); struct nlattr *tca[TCA_ACT_MAX + 1]; u32 portid = skb ? NETLINK_CB(skb).portid : 0; int ret = 0, ovr = 0; if ((n->nlmsg_type != RTM_GETACTION) && !netlink_capable(skb, CAP_NET_ADMIN)) return -EPERM; ret = nlmsg_parse(n, sizeof(struct tcamsg), tca, TCA_ACT_MAX, NULL); if (ret < 0) return ret; if (tca[TCA_ACT_TAB] == NULL) { pr_notice("tc_ctl_action: received NO action attribs\n"); return -EINVAL; } /* n->nlmsg_flags & NLM_F_CREATE */ switch (n->nlmsg_type) { case RTM_NEWACTION: /* we are going to assume all other flags * imply create only if it doesn't exist * Note that CREATE | EXCL implies that * but since we want avoid ambiguity (eg when flags * is zero) then just set this */ if (n->nlmsg_flags & NLM_F_REPLACE) ovr = 1; replay: ret = tcf_action_add(net, tca[TCA_ACT_TAB], n, portid, ovr); if (ret == -EAGAIN) goto replay; break; case RTM_DELACTION: ret = tca_action_gd(net, tca[TCA_ACT_TAB], n, portid, RTM_DELACTION); break; case RTM_GETACTION: ret = tca_action_gd(net, tca[TCA_ACT_TAB], n, portid, RTM_GETACTION); break; default: BUG(); } return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Jamal Hadi Salim13857.98%17.14%
Patrick McHardy5021.01%428.57%
Eric W. Biedermann2711.34%321.43%
Denis V. Lunev114.62%17.14%
Thomas Goff62.52%17.14%
Hideaki Yoshifuji / 吉藤英明31.26%17.14%
Lucas De Marchi10.42%17.14%
Stephen Hemminger10.42%17.14%
Eric Dumazet10.42%17.14%
Total238100.00%14100.00%


static struct nlattr *find_dump_kind(const struct nlmsghdr *n) { struct nlattr *tb1, *tb2[TCA_ACT_MAX + 1]; struct nlattr *tb[TCA_ACT_MAX_PRIO + 1]; struct nlattr *nla[TCAA_MAX + 1]; struct nlattr *kind; if (nlmsg_parse(n, sizeof(struct tcamsg), nla, TCAA_MAX, NULL) < 0) return NULL; tb1 = nla[TCA_ACT_TAB]; if (tb1 == NULL) return NULL; if (nla_parse(tb, TCA_ACT_MAX_PRIO, nla_data(tb1), NLMSG_ALIGN(nla_len(tb1)), NULL) < 0) return NULL; if (tb[1] == NULL) return NULL; if (nla_parse_nested(tb2, TCA_ACT_MAX, tb[1], NULL) < 0) return NULL; kind = tb2[TCA_ACT_KIND]; return kind; }

Contributors

PersonTokensPropCommitsCommitProp
Jamal Hadi Salim13280.49%220.00%
Patrick McHardy3018.29%660.00%
Johannes Berg10.61%110.00%
Thomas Graf10.61%110.00%
Total164100.00%10100.00%


static int tc_dump_action(struct sk_buff *skb, struct netlink_callback *cb) { struct net *net = sock_net(skb->sk); struct nlmsghdr *nlh; unsigned char *b = skb_tail_pointer(skb); struct nlattr *nest; struct tc_action_ops *a_o; int ret = 0; struct tcamsg *t = (struct tcamsg *) nlmsg_data(cb->nlh); struct nlattr *kind = find_dump_kind(cb->nlh); if (kind == NULL) { pr_info("tc_dump_action: action bad kind\n"); return 0; } a_o = tc_lookup_action(kind); if (a_o == NULL) return 0; nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, cb->nlh->nlmsg_type, sizeof(*t), 0); if (!nlh) goto out_module_put; t = nlmsg_data(nlh); t->tca_family = AF_UNSPEC; t->tca__pad1 = 0; t->tca__pad2 = 0; nest = nla_nest_start(skb, TCA_ACT_TAB); if (nest == NULL) goto out_module_put; ret = a_o->walk(net, skb, cb, RTM_GETACTION, a_o); if (ret < 0) goto out_module_put; if (ret > 0) { nla_nest_end(skb, nest); ret = skb->len; } else nlmsg_trim(skb, b); nlh->nlmsg_len = skb_tail_pointer(skb) - b; if (NETLINK_CB(cb->skb).portid && ret) nlh->nlmsg_flags |= NLM_F_MULTI; module_put(a_o->owner); return skb->len; out_module_put: module_put(a_o->owner); nlmsg_trim(skb, b); return skb->len; }

Contributors

PersonTokensPropCommitsCommitProp
Jamal Hadi Salim24575.62%320.00%
Patrick McHardy3410.49%426.67%
David S. Miller164.94%16.67%
Américo Wang154.63%213.33%
Arnaldo Carvalho de Melo92.78%213.33%
Eric W. Biedermann20.62%16.67%
Thomas Graf20.62%16.67%
Stephen Hemminger10.31%16.67%
Total324100.00%15100.00%


static int __init tc_action_init(void) { rtnl_register(PF_UNSPEC, RTM_NEWACTION, tc_ctl_action, NULL, NULL); rtnl_register(PF_UNSPEC, RTM_DELACTION, tc_ctl_action, NULL, NULL); rtnl_register(PF_UNSPEC, RTM_GETACTION, tc_ctl_action, tc_dump_action, NULL); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Jamal Hadi Salim2345.10%133.33%
Thomas Graf2243.14%133.33%
Greg Rose611.76%133.33%
Total51100.00%3100.00%

subsys_initcall(tc_action_init);

Overall Contributors

PersonTokensPropCommitsCommitProp
Jamal Hadi Salim249043.54%1815.93%
Américo Wang100817.63%2118.58%
David S. Miller89015.56%43.54%
Patrick McHardy61610.77%2320.35%
Thomas Graf1813.16%119.73%
Eric Dumazet1712.99%43.54%
Wolfgang Bumiller1141.99%10.88%
Eric W. Biedermann470.82%32.65%
Arnaldo Carvalho de Melo440.77%21.77%
Thomas Goff400.70%10.88%
Stephen Hemminger200.35%21.77%
Denis V. Lunev200.35%21.77%
Benjamin LaHaise180.31%10.88%
Daniel Borkmann150.26%10.88%
John Fastabend80.14%32.65%
Greg Rose60.10%10.88%
Willem de Bruijn50.09%10.88%
Thomas Gleixner40.07%10.88%
Nicolas Dichtel40.07%10.88%
Hideaki Yoshifuji / 吉藤英明30.05%10.88%
Paul Gortmaker30.05%10.88%
Yang Yingliang30.05%10.88%
Roman Mashak20.03%21.77%
Johannes Berg20.03%21.77%
Wei Yongjun10.02%10.88%
Alexei Starovoitov10.02%10.88%
Lucas De Marchi10.02%10.88%
Dirk Hohndel10.02%10.88%
Tejun Heo10.02%10.88%
Total5719100.00%113100.00%
Directory: net/sched
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.