cregit-Linux how code gets into the kernel

Release 4.11 net/xfrm/xfrm_policy.c

Directory: net/xfrm
/*
 * xfrm_policy.c
 *
 * Changes:
 *      Mitsuru KANDA @USAGI
 *      Kazunori MIYAZAWA @USAGI
 *      Kunihiro Ishiguro <kunihiro@ipinfusion.com>
 *              IPv6 support
 *      Kazunori MIYAZAWA @USAGI
 *      YOSHIFUJI Hideaki
 *              Split up af-specific portion
 *      Derek Atkins <derek@ihtfp.com>          Add the post_input processor
 *
 */

#include <linux/err.h>
#include <linux/slab.h>
#include <linux/kmod.h>
#include <linux/list.h>
#include <linux/spinlock.h>
#include <linux/workqueue.h>
#include <linux/notifier.h>
#include <linux/netdevice.h>
#include <linux/netfilter.h>
#include <linux/module.h>
#include <linux/cache.h>
#include <linux/audit.h>
#include <net/dst.h>
#include <net/flow.h>
#include <net/xfrm.h>
#include <net/ip.h>
#ifdef CONFIG_XFRM_STATISTICS
#include <net/snmp.h>
#endif

#include "xfrm_hash.h"


#define XFRM_QUEUE_TMO_MIN ((unsigned)(HZ/10))

#define XFRM_QUEUE_TMO_MAX ((unsigned)(60*HZ))

#define XFRM_MAX_QUEUE_LEN	100


struct xfrm_flo {
	
struct dst_entry *dst_orig;
	
u8 flags;
};

static DEFINE_SPINLOCK(xfrm_policy_afinfo_lock);
static struct xfrm_policy_afinfo const __rcu *xfrm_policy_afinfo[AF_INET6 + 1]
						
__read_mostly;


static struct kmem_cache *xfrm_dst_cache __read_mostly;

static __read_mostly seqcount_t xfrm_policy_hash_generation;

static void xfrm_init_pmtu(struct dst_entry *dst);
static int stale_bundle(struct dst_entry *dst);
static int xfrm_bundle_ok(struct xfrm_dst *xdst);
static void xfrm_policy_queue_process(unsigned long arg);

static void __xfrm_policy_link(struct xfrm_policy *pol, int dir);
static struct xfrm_policy *__xfrm_policy_unlink(struct xfrm_policy *pol,
						int dir);


static inline bool xfrm_pol_hold_rcu(struct xfrm_policy *policy) { return atomic_inc_not_zero(&policy->refcnt); }

Contributors

PersonTokensPropCommitsCommitProp
Florian Westphal21100.00%1100.00%
Total21100.00%1100.00%


static inline bool __xfrm4_selector_match(const struct xfrm_selector *sel, const struct flowi *fl) { const struct flowi4 *fl4 = &fl->u.ip4; return addr4_match(fl4->daddr, sel->daddr.a4, sel->prefixlen_d) && addr4_match(fl4->saddr, sel->saddr.a4, sel->prefixlen_s) && !((xfrm_flowi_dport(fl, &fl4->uli) ^ sel->dport) & sel->dport_mask) && !((xfrm_flowi_sport(fl, &fl4->uli) ^ sel->sport) & sel->sport_mask) && (fl4->flowi4_proto == sel->proto || !sel->proto) && (fl4->flowi4_oif == sel->ifindex || !sel->ifindex); }

Contributors

PersonTokensPropCommitsCommitProp
Andrew Morton10372.03%112.50%
David S. Miller3423.78%675.00%
Alexey Dobriyan64.20%112.50%
Total143100.00%8100.00%


static inline bool __xfrm6_selector_match(const struct xfrm_selector *sel, const struct flowi *fl) { const struct flowi6 *fl6 = &fl->u.ip6; return addr_match(&fl6->daddr, &sel->daddr, sel->prefixlen_d) && addr_match(&fl6->saddr, &sel->saddr, sel->prefixlen_s) && !((xfrm_flowi_dport(fl, &fl6->uli) ^ sel->dport) & sel->dport_mask) && !((xfrm_flowi_sport(fl, &fl6->uli) ^ sel->sport) & sel->sport_mask) && (fl6->flowi6_proto == sel->proto || !sel->proto) && (fl6->flowi6_oif == sel->ifindex || !sel->ifindex); }

Contributors

PersonTokensPropCommitsCommitProp
Andrew Morton10976.22%114.29%
David S. Miller3423.78%685.71%
Total143100.00%7100.00%


bool xfrm_selector_match(const struct xfrm_selector *sel, const struct flowi *fl, unsigned short family) { switch (family) { case AF_INET: return __xfrm4_selector_match(sel, fl); case AF_INET6: return __xfrm6_selector_match(sel, fl); } return false; }

Contributors

PersonTokensPropCommitsCommitProp
Herbert Xu3873.08%233.33%
Andrew Morton1019.23%116.67%
David S. Miller47.69%350.00%
Total52100.00%6100.00%


static const struct xfrm_policy_afinfo *xfrm_policy_get_afinfo(unsigned short family) { const struct xfrm_policy_afinfo *afinfo; if (unlikely(family >= ARRAY_SIZE(xfrm_policy_afinfo))) return NULL; rcu_read_lock(); afinfo = rcu_dereference(xfrm_policy_afinfo[family]); if (unlikely(!afinfo)) rcu_read_unlock(); return afinfo; }

Contributors

PersonTokensPropCommitsCommitProp
Eric Dumazet5590.16%150.00%
Florian Westphal69.84%150.00%
Total61100.00%2100.00%


static inline struct dst_entry *__xfrm_dst_lookup(struct net *net, int tos, int oif, const xfrm_address_t *saddr, const xfrm_address_t *daddr, int family) { const struct xfrm_policy_afinfo *afinfo; struct dst_entry *dst; afinfo = xfrm_policy_get_afinfo(family); if (unlikely(afinfo == NULL)) return ERR_PTR(-EAFNOSUPPORT); dst = afinfo->dst_lookup(net, tos, oif, saddr, daddr); rcu_read_unlock(); return dst; }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明7381.11%116.67%
Alexey Dobriyan77.78%116.67%
David Ahern55.56%116.67%
Florian Westphal33.33%233.33%
David S. Miller22.22%116.67%
Total90100.00%6100.00%


static inline struct dst_entry *xfrm_dst_lookup(struct xfrm_state *x, int tos, int oif, xfrm_address_t *prev_saddr, xfrm_address_t *prev_daddr, int family) { struct net *net = xs_net(x); xfrm_address_t *saddr = &x->props.saddr; xfrm_address_t *daddr = &x->id.daddr; struct dst_entry *dst; if (x->type->flags & XFRM_TYPE_LOCAL_COADDR) { saddr = x->coaddr; daddr = prev_daddr; } if (x->type->flags & XFRM_TYPE_REMOTE_COADDR) { saddr = prev_saddr; daddr = x->coaddr; } dst = __xfrm_dst_lookup(net, tos, oif, saddr, daddr, family); if (!IS_ERR(dst)) { if (prev_saddr != saddr) memcpy(prev_saddr, saddr, sizeof(*prev_saddr)); if (prev_daddr != daddr) memcpy(prev_daddr, daddr, sizeof(*prev_daddr)); } return dst; }

Contributors

PersonTokensPropCommitsCommitProp
Herbert Xu10156.11%457.14%
Hideaki Yoshifuji / 吉藤英明6234.44%114.29%
Alexey Dobriyan126.67%114.29%
David Ahern52.78%114.29%
Total180100.00%7100.00%


static inline unsigned long make_jiffies(long secs) { if (secs >= (MAX_SCHEDULE_TIMEOUT-1)/HZ) return MAX_SCHEDULE_TIMEOUT-1; else return secs*HZ; }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明2161.76%150.00%
Kazunori Miyazawa1338.24%150.00%
Total34100.00%2100.00%


static void xfrm_policy_timer(unsigned long data) { struct xfrm_policy *xp = (struct xfrm_policy *)data; unsigned long now = get_seconds(); long next = LONG_MAX; int warn = 0; int dir; read_lock(&xp->lock); if (unlikely(xp->walk.dead)) goto out; dir = xfrm_policy_id2dir(xp->index); if (xp->lft.hard_add_expires_seconds) { long tmo = xp->lft.hard_add_expires_seconds + xp->curlft.add_time - now; if (tmo <= 0) goto expired; if (tmo < next) next = tmo; } if (xp->lft.hard_use_expires_seconds) { long tmo = xp->lft.hard_use_expires_seconds + (xp->curlft.use_time ? : xp->curlft.add_time) - now; if (tmo <= 0) goto expired; if (tmo < next) next = tmo; } if (xp->lft.soft_add_expires_seconds) { long tmo = xp->lft.soft_add_expires_seconds + xp->curlft.add_time - now; if (tmo <= 0) { warn = 1; tmo = XFRM_KM_TIMEOUT; } if (tmo < next) next = tmo; } if (xp->lft.soft_use_expires_seconds) { long tmo = xp->lft.soft_use_expires_seconds + (xp->curlft.use_time ? : xp->curlft.add_time) - now; if (tmo <= 0) { warn = 1; tmo = XFRM_KM_TIMEOUT; } if (tmo < next) next = tmo; } if (warn) km_policy_expired(xp, dir, 0, 0); if (next != LONG_MAX && !mod_timer(&xp->timer, jiffies + make_jiffies(next))) xfrm_pol_hold(xp); out: read_unlock(&xp->lock); xfrm_pol_put(xp); return; expired: read_unlock(&xp->lock); if (!xfrm_policy_delete(xp, dir)) km_policy_expired(xp, dir, 1, 0); xfrm_pol_put(xp); }

Contributors

PersonTokensPropCommitsCommitProp
Herbert Xu24062.66%642.86%
Hideaki Yoshifuji / 吉藤英明8321.67%17.14%
Alexey Kuznetsov277.05%17.14%
David S. Miller174.44%17.14%
Kazunori Miyazawa61.57%17.14%
Jamal Hadi Salim41.04%17.14%
Timo Teräs30.78%17.14%
James Morris30.78%214.29%
Total383100.00%14100.00%


static struct flow_cache_object *xfrm_policy_flo_get(struct flow_cache_object *flo) { struct xfrm_policy *pol = container_of(flo, struct xfrm_policy, flo); if (unlikely(pol->walk.dead)) flo = NULL; else xfrm_pol_hold(pol); return flo; }

Contributors

PersonTokensPropCommitsCommitProp
Timo Teräs52100.00%1100.00%
Total52100.00%1100.00%


static int xfrm_policy_flo_check(struct flow_cache_object *flo) { struct xfrm_policy *pol = container_of(flo, struct xfrm_policy, flo); return !pol->walk.dead; }

Contributors

PersonTokensPropCommitsCommitProp
Timo Teräs34100.00%1100.00%
Total34100.00%1100.00%


static void xfrm_policy_flo_delete(struct flow_cache_object *flo) { xfrm_pol_put(container_of(flo, struct xfrm_policy, flo)); }

Contributors

PersonTokensPropCommitsCommitProp
Timo Teräs24100.00%1100.00%
Total24100.00%1100.00%

static const struct flow_cache_ops xfrm_policy_fc_ops = { .get = xfrm_policy_flo_get, .check = xfrm_policy_flo_check, .delete = xfrm_policy_flo_delete, }; /* Allocate xfrm_policy. Not used here, it is supposed to be used by pfkeyv2 * SPD calls. */
struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp) { struct xfrm_policy *policy; policy = kzalloc(sizeof(struct xfrm_policy), gfp); if (policy) { write_pnet(&policy->xp_net, net); INIT_LIST_HEAD(&policy->walk.all); INIT_HLIST_NODE(&policy->bydst); INIT_HLIST_NODE(&policy->byidx); rwlock_init(&policy->lock); atomic_set(&policy->refcnt, 1); skb_queue_head_init(&policy->polq.hold_queue); setup_timer(&policy->timer, xfrm_policy_timer, (unsigned long)policy); setup_timer(&policy->polq.hold_timer, xfrm_policy_queue_process, (unsigned long)policy); policy->flo.ops = &xfrm_policy_fc_ops; } return policy; }

Contributors

PersonTokensPropCommitsCommitProp
Alexey Kuznetsov5637.58%428.57%
Steffen Klassert2818.79%17.14%
David S. Miller2013.42%17.14%
Timo Teräs1610.74%214.29%
Alexey Dobriyan1510.07%17.14%
Pavel Emelyanov53.36%17.14%
Andrew Morton42.68%17.14%
Herbert Xu32.01%17.14%
Panagiotis Issaris10.67%17.14%
Al Viro10.67%17.14%
Total149100.00%14100.00%

EXPORT_SYMBOL(xfrm_policy_alloc);
static void xfrm_policy_destroy_rcu(struct rcu_head *head) { struct xfrm_policy *policy = container_of(head, struct xfrm_policy, rcu); security_xfrm_policy_free(policy->security); kfree(policy); }

Contributors

PersonTokensPropCommitsCommitProp
Eric Dumazet38100.00%1100.00%
Total38100.00%1100.00%

/* Destroy xfrm_policy: descendant resources must be released to this moment. */
void xfrm_policy_destroy(struct xfrm_policy *policy) { BUG_ON(!policy->walk.dead); if (del_timer(&policy->timer) || del_timer(&policy->polq.hold_timer)) BUG(); call_rcu(&policy->rcu, xfrm_policy_destroy_rcu); }

Contributors

PersonTokensPropCommitsCommitProp
Alexey Kuznetsov2954.72%222.22%
Fan Du1018.87%111.11%
Eric Dumazet59.43%111.11%
Kris Katterjohn35.66%111.11%
Trent Jaeger23.77%111.11%
Herbert Xu23.77%111.11%
Paul Moore11.89%111.11%
Américo Wang11.89%111.11%
Total53100.00%9100.00%

EXPORT_SYMBOL(xfrm_policy_destroy); /* Rule must be locked. Release descendant resources, announce * entry dead. The rule must be unlinked from lists to the moment. */
static void xfrm_policy_kill(struct xfrm_policy *policy) { policy->walk.dead = 1; atomic_inc(&policy->genid); if (del_timer(&policy->polq.hold_timer)) xfrm_pol_put(policy); skb_queue_purge(&policy->polq.hold_queue); if (del_timer(&policy->timer)) xfrm_pol_put(policy); xfrm_pol_put(policy); }

Contributors

PersonTokensPropCommitsCommitProp
Herbert Xu2939.19%333.33%
Steffen Klassert2635.14%222.22%
Timo Teräs1317.57%111.11%
Alexey Kuznetsov45.41%111.11%
Li RongQing11.35%111.11%
Christoph Hellwig11.35%111.11%
Total74100.00%9100.00%

static unsigned int xfrm_policy_hashmax __read_mostly = 1 * 1024 * 1024;
static inline unsigned int idx_hash(struct net *net, u32 index) { return __idx_hash(index, net->xfrm.policy_idx_hmask); }

Contributors

PersonTokensPropCommitsCommitProp
David S. Miller1760.71%125.00%
Alexey Dobriyan1035.71%250.00%
Masahide Nakamura13.57%125.00%
Total28100.00%4100.00%

/* calculate policy hash thresholds */
static void __get_hash_thresh(struct net *net, unsigned short family, int dir, u8 *dbits, u8 *sbits) { switch (family) { case AF_INET: *dbits = net->xfrm.policy_bydst[dir].dbits4; *sbits = net->xfrm.policy_bydst[dir].sbits4; break; case AF_INET6: *dbits = net->xfrm.policy_bydst[dir].dbits6; *sbits = net->xfrm.policy_bydst[dir].sbits6; break; default: *dbits = 0; *sbits = 0; } }

Contributors

PersonTokensPropCommitsCommitProp
Christophe Gouault107100.00%1100.00%
Total107100.00%1100.00%


static struct hlist_head *policy_hash_bysel(struct net *net, const struct xfrm_selector *sel, unsigned short family, int dir) { unsigned int hmask = net->xfrm.policy_bydst[dir].hmask; unsigned int hash; u8 dbits; u8 sbits; __get_hash_thresh(net, family, dir, &dbits, &sbits); hash = __sel_hash(sel, family, hmask, dbits, sbits); if (hash == hmask + 1) return &net->xfrm.policy_inexact[dir]; return rcu_dereference_check(net->xfrm.policy_bydst[dir].table, lockdep_is_held(&net->xfrm.xfrm_policy_lock)) + hash; }

Contributors

PersonTokensPropCommitsCommitProp
David S. Miller5946.46%228.57%
Christophe Gouault2922.83%114.29%
Alexey Dobriyan2015.75%342.86%
Florian Westphal1914.96%114.29%
Total127100.00%7100.00%


static struct hlist_head *policy_hash_direct(struct net *net, const xfrm_address_t *daddr, const xfrm_address_t *saddr, unsigned short family, int dir) { unsigned int hmask = net->xfrm.policy_bydst[dir].hmask; unsigned int hash; u8 dbits; u8 sbits; __get_hash_thresh(net, family, dir, &dbits, &sbits); hash = __addr_hash(daddr, saddr, family, hmask, dbits, sbits); return rcu_dereference_check(net->xfrm.policy_bydst[dir].table, lockdep_is_held(&net->xfrm.xfrm_policy_lock)) + hash; }

Contributors

PersonTokensPropCommitsCommitProp
David S. Miller5750.00%233.33%
Christophe Gouault2925.44%116.67%
Alexey Dobriyan1513.16%233.33%
Florian Westphal1311.40%116.67%
Total114100.00%6100.00%


static void xfrm_dst_hash_transfer(struct net *net, struct hlist_head *list, struct hlist_head *ndsttable, unsigned int nhashmask, int dir) { struct hlist_node *tmp, *entry0 = NULL; struct xfrm_policy *pol; unsigned int h0 = 0; u8 dbits; u8 sbits; redo: hlist_for_each_entry_safe(pol, tmp, list, bydst) { unsigned int h; __get_hash_thresh(net, pol->family, dir, &dbits, &sbits); h = __addr_hash(&pol->selector.daddr, &pol->selector.saddr, pol->family, nhashmask, dbits, sbits); if (!entry0) { hlist_del_rcu(&pol->bydst); hlist_add_head_rcu(&pol->bydst, ndsttable + h); h0 = h; } else { if (h != h0) continue; hlist_del_rcu(&pol->bydst); hlist_add_behind_rcu(&pol->bydst, entry0); } entry0 = &pol->bydst; } if (!hlist_empty(list)) { entry0 = NULL; goto redo; } }

Contributors

PersonTokensPropCommitsCommitProp
David S. Miller8240.59%116.67%
Hideaki Yoshifuji / 吉藤英明6733.17%116.67%
Christophe Gouault3517.33%116.67%
Sasha Levin125.94%116.67%
Florian Westphal41.98%116.67%
Ken Helias20.99%116.67%
Total202100.00%6100.00%


static void xfrm_idx_hash_transfer(struct hlist_head *list, struct hlist_head *nidxtable, unsigned int nhashmask) { struct hlist_node *tmp; struct xfrm_policy *pol; hlist_for_each_entry_safe(pol, tmp, list, byidx) { unsigned int h; h = __idx_hash(pol->index, nhashmask); hlist_add_head(&pol->byidx, nidxtable+h); } }

Contributors

PersonTokensPropCommitsCommitProp
David S. Miller69100.00%1100.00%
Total69100.00%1100.00%


static unsigned long xfrm_new_hash_mask(unsigned int old_hmask) { return ((old_hmask + 1) << 1) - 1; }

Contributors

PersonTokensPropCommitsCommitProp
David S. Miller24100.00%1100.00%
Total24100.00%1100.00%


static void xfrm_bydst_resize(struct net *net, int dir) { unsigned int hmask = net->xfrm.policy_bydst[dir].hmask; unsigned int nhashmask = xfrm_new_hash_mask(hmask); unsigned int nsize = (nhashmask + 1) * sizeof(struct hlist_head); struct hlist_head *ndst = xfrm_hash_alloc(nsize); struct hlist_head *odst; int i; if (!ndst) return; spin_lock_bh(&net->xfrm.xfrm_policy_lock); write_seqcount_begin(&xfrm_policy_hash_generation); odst = rcu_dereference_protected(net->xfrm.policy_bydst[dir].table, lockdep_is_held(&net->xfrm.xfrm_policy_lock)); odst = rcu_dereference_protected(net->xfrm.policy_bydst[dir].table, lockdep_is_held(&net->xfrm.xfrm_policy_lock)); for (i = hmask; i >= 0; i--) xfrm_dst_hash_transfer(net, odst + i, ndst, nhashmask, dir); rcu_assign_pointer(net->xfrm.policy_bydst[dir].table, ndst); net->xfrm.policy_bydst[dir].hmask = nhashmask; write_seqcount_end(&xfrm_policy_hash_generation); spin_unlock_bh(&net->xfrm.xfrm_policy_lock); synchronize_rcu(); xfrm_hash_free(odst, (hmask + 1) * sizeof(struct hlist_head)); }

Contributors

PersonTokensPropCommitsCommitProp
David S. Miller12953.97%222.22%
Florian Westphal7832.64%333.33%
Alexey Dobriyan208.37%222.22%
Fan Du83.35%111.11%
Christophe Gouault41.67%111.11%
Total239100.00%9100.00%


static void xfrm_byidx_resize(struct net *net, int total) { unsigned int hmask = net->xfrm.policy_idx_hmask; unsigned int nhashmask = xfrm_new_hash_mask(hmask); unsigned int nsize = (nhashmask + 1) * sizeof(struct hlist_head); struct hlist_head *oidx = net->xfrm.policy_byidx; struct hlist_head *nidx = xfrm_hash_alloc(nsize); int i; if (!nidx) return; spin_lock_bh(&net->xfrm.xfrm_policy_lock); for (i = hmask; i >= 0; i--) xfrm_idx_hash_transfer(oidx + i, nidx, nhashmask); net->xfrm.policy_byidx = nidx; net->xfrm.policy_idx_hmask = nhashmask; spin_unlock_bh(&net->xfrm.xfrm_policy_lock); xfrm_hash_free(oidx, (hmask + 1) * sizeof(struct hlist_head)); }

Contributors

PersonTokensPropCommitsCommitProp
David S. Miller12177.56%228.57%
Alexey Dobriyan2516.03%342.86%
Fan Du85.13%114.29%
Florian Westphal21.28%114.29%
Total156100.00%7100.00%


static inline int xfrm_bydst_should_resize(struct net *net, int dir, int *total) { unsigned int cnt = net->xfrm.policy_count[dir]; unsigned int hmask = net->xfrm.policy_bydst[dir].hmask; if (total) *total += cnt; if ((hmask + 1) < xfrm_policy_hashmax && cnt > hmask) return 1; return 0; }

Contributors

PersonTokensPropCommitsCommitProp
David S. Miller6180.26%125.00%
Alexey Dobriyan1519.74%375.00%
Total76100.00%4100.00%


static inline int xfrm_byidx_should_resize(struct net *net, int total) { unsigned int hmask = net->xfrm.policy_idx_hmask; if ((hmask + 1) < xfrm_policy_hashmax && total > hmask) return 1; return 0; }

Contributors

PersonTokensPropCommitsCommitProp
David S. Miller3577.78%133.33%
Alexey Dobriyan1022.22%266.67%
Total45100.00%3100.00%


void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si) { si->incnt = net->xfrm.policy_count[XFRM_POLICY_IN]; si->outcnt = net->xfrm.policy_count[XFRM_POLICY_OUT]; si->fwdcnt = net->xfrm.policy_count[XFRM_POLICY_FWD]; si->inscnt = net->xfrm.policy_count[XFRM_POLICY_IN+XFRM_POLICY_MAX]; si->outscnt = net->xfrm.policy_count[XFRM_POLICY_OUT+XFRM_POLICY_MAX]; si->fwdscnt = net->xfrm.policy_count[XFRM_POLICY_FWD+XFRM_POLICY_MAX]; si->spdhcnt = net->xfrm.policy_idx_hmask; si->spdhmcnt = xfrm_policy_hashmax; }

Contributors

PersonTokensPropCommitsCommitProp
Jamal Hadi Salim7565.22%240.00%
Alexey Dobriyan4034.78%360.00%
Total115100.00%5100.00%

EXPORT_SYMBOL(xfrm_spd_getinfo); static DEFINE_MUTEX(hash_resize_mutex);
static void xfrm_hash_resize(struct work_struct *work) { struct net *net = container_of(work, struct net, xfrm.policy_hash_work); int dir, total; mutex_lock(&hash_resize_mutex); total = 0; for (dir = 0; dir < XFRM_POLICY_MAX; dir++) { if (xfrm_bydst_should_resize(net, dir, &total)) xfrm_bydst_resize(net, dir); } if (xfrm_byidx_should_resize(net, total)) xfrm_byidx_resize(net, total); mutex_unlock(&hash_resize_mutex); }

Contributors

PersonTokensPropCommitsCommitProp
David S. Miller6868.69%120.00%
Alexey Dobriyan2626.26%120.00%
Masahide Nakamura22.02%120.00%
David Howells22.02%120.00%
Alexey Kuznetsov11.01%120.00%
Total99100.00%5100.00%


static void xfrm_hash_rebuild(struct work_struct *work) { struct net *net = container_of(work, struct net, xfrm.policy_hthresh.work); unsigned int hmask; struct xfrm_policy *pol; struct xfrm_policy *policy; struct hlist_head *chain; struct hlist_head *odst; struct hlist_node *newpos; int i; int dir; unsigned seq; u8 lbits4, rbits4, lbits6, rbits6; mutex_lock(&hash_resize_mutex); /* read selector prefixlen thresholds */ do { seq = read_seqbegin(&net->xfrm.policy_hthresh.lock); lbits4 = net->xfrm.policy_hthresh.lbits4; rbits4 = net->xfrm.policy_hthresh.rbits4; lbits6 = net->xfrm.policy_hthresh.lbits6; rbits6 = net->xfrm.policy_hthresh.rbits6; } while (read_seqretry(&net->xfrm.policy_hthresh.lock, seq)); spin_lock_bh(&net->xfrm.xfrm_policy_lock); /* reset the bydst and inexact table in all directions */ for (dir = 0; dir < XFRM_POLICY_MAX; dir++) { INIT_HLIST_HEAD(&net->xfrm.policy_inexact[dir]); hmask = net->xfrm.policy_bydst[dir].hmask; odst = net->xfrm.policy_bydst[dir].table; for (i = hmask; i >= 0; i--) INIT_HLIST_HEAD(odst + i); if ((dir & XFRM_POLICY_MASK) == XFRM_POLICY_OUT) { /* dir out => dst = remote, src = local */ net->xfrm.policy_bydst[dir].dbits4 = rbits4; net->xfrm.policy_bydst[dir].sbits4 = lbits4; net->xfrm.policy_bydst[dir].dbits6 = rbits6; net->xfrm.policy_bydst[dir].sbits6 = lbits6; } else { /* dir in/fwd => dst = local, src = remote */ net->xfrm.policy_bydst[dir].dbits4 = lbits4; net->xfrm.policy_bydst[dir].sbits4 = rbits4; net->xfrm.policy_bydst[dir].dbits6 = lbits6; net->xfrm.policy_bydst[dir].sbits6 = rbits6; } } /* re-insert all policies by order of creation */ list_for_each_entry_reverse(policy, &net->xfrm.policy_all, walk.all) { if (xfrm_policy_id2dir(policy->index) >= XFRM_POLICY_MAX) { /* skip socket policies */ continue; } newpos = NULL; chain = policy_hash_bysel(net, &policy->selector, policy->family, xfrm_policy_id2dir(policy->index)); hlist_for_each_entry(pol, chain, bydst) { if (policy->priority >= pol->priority) newpos = &pol->bydst; else break; } if (newpos) hlist_add_behind(&policy->bydst, newpos); else hlist_add_head(&policy->bydst, chain); } spin_unlock_bh(&net->xfrm.xfrm_policy_lock); mutex_unlock(&hash_resize_mutex); }

Contributors

PersonTokensPropCommitsCommitProp
Christophe Gouault44992.20%114.29%
Tobias Brunner153.08%114.29%
Jamal Hadi Salim112.26%114.29%
Fan Du40.82%114.29%
David S. Miller40.82%114.29%
Alexey Dobriyan20.41%114.29%
Florian Westphal20.41%114.29%
Total487100.00%7100.00%


void xfrm_policy_hash_rebuild(struct net *net) { schedule_work(&net->xfrm.policy_hthresh.work); }

Contributors

PersonTokensPropCommitsCommitProp
Christophe Gouault940.91%120.00%
David S. Miller731.82%120.00%
Alexey Dobriyan418.18%120.00%
Masahide Nakamura14.55%120.00%
David Howells14.55%120.00%
Total22100.00%5100.00%

EXPORT_SYMBOL(xfrm_policy_hash_rebuild); /* Generate new index... KAME seems to generate them ordered by cost * of an absolute inpredictability of ordering of rules. This will not pass. */
static u32 xfrm_gen_index(struct net *net, int dir, u32 index) { static u32 idx_generator; for (;;) { struct hlist_head *list; struct xfrm_policy *p; u32 idx; int found; if (!index) { idx = (idx_generator | dir); idx_generator += 8; } else { idx = index; index = 0; } if (idx == 0) idx = 8; list = net->xfrm.policy_byidx + idx_hash(net, idx); found = 0; hlist_for_each_entry(p, list, byidx) { if (p->index == idx) { found = 1; break; } } if (!found) return idx; } }

Contributors

PersonTokensPropCommitsCommitProp
David S. Miller8864.71%116.67%
Fan Du2115.44%116.67%
Alexey Kuznetsov1511.03%116.67%
Alexey Dobriyan128.82%350.00%
Total136100.00%6100.00%


static inline int selector_cmp(struct xfrm_selector *s1, struct xfrm_selector *s2) { u32 *p1 = (u32 *) s1; u32 *p2 = (u32 *) s2; int len = sizeof(struct xfrm_selector) / sizeof(u32); int i; for (i = 0; i < len; i++) { if (p1[i] != p2[i]) return 1; } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
David S. Miller8091.95%150.00%
Alexey Kuznetsov78.05%150.00%
Total87100.00%2100.00%


static void xfrm_policy_requeue(struct xfrm_policy *old, struct xfrm_policy *new) { struct xfrm_policy_queue *pq = &old->polq; struct sk_buff_head list; if (skb_queue_empty(&pq->hold_queue)) return; __skb_queue_head_init(&list); spin_lock_bh(&pq->hold_queue.lock); skb_queue_splice_init(&pq->hold_queue, &list); if (del_timer(&pq->hold_timer)) xfrm_pol_put(old); spin_unlock_bh(&pq->hold_queue.lock); pq = &new->polq; spin_lock_bh(&pq->hold_queue.lock); skb_queue_splice(&list, &pq->hold_queue); pq->timeout = XFRM_QUEUE_TMO_MIN; if (!mod_timer(&pq->hold_timer, jiffies)) xfrm_pol_hold(new); spin_unlock_bh(&pq->hold_queue.lock); }

Contributors

PersonTokensPropCommitsCommitProp
Steffen Klassert10567.74%222.22%
Alexey Kuznetsov127.74%111.11%
Li RongQing117.10%111.11%
David S. Miller85.16%111.11%
Jamal Hadi Salim74.52%111.11%
Trent Jaeger42.58%111.11%
Herbert Xu42.58%111.11%
Masahide Nakamura42.58%111.11%
Total155100.00%9100.00%


static bool xfrm_policy_mark_match(struct xfrm_policy *policy, struct xfrm_policy *pol) { u32 mark = policy->mark.v & policy->mark.m; if (policy->mark.v == pol->mark.v && policy->mark.m == pol->mark.m) return true; if ((mark & pol->mark.m) == pol->mark.v && policy->priority == pol->priority) return true; return false; }

Contributors

PersonTokensPropCommitsCommitProp
Steffen Klassert92100.00%1100.00%
Total92100.00%1100.00%


int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl) { struct net *net = xp_net(policy); struct xfrm_policy *pol; struct xfrm_policy *delpol; struct hlist_head *chain; struct hlist_node *newpos; spin_lock_bh(&net->xfrm.xfrm_policy_lock); chain = policy_hash_bysel(net, &policy->selector, policy->family, dir); delpol = NULL; newpos = NULL; hlist_for_each_entry(pol, chain, bydst) { if (pol->type == policy->type && !selector_cmp(&pol->selector, &policy->selector) && xfrm_policy_mark_match(policy, pol) && xfrm_sec_ctx_match(pol->security, policy->security) && !WARN_ON(delpol)) { if (excl) { spin_unlock_bh(&net->xfrm.xfrm_policy_lock); return -EEXIST; } delpol = pol; if (policy->priority > pol->priority) continue; } else if (policy->priority >= pol->priority) { newpos = &pol->bydst; continue; } if (delpol) break; } if (newpos) hlist_add_behind(&policy->bydst, newpos); else hlist_add_head(&policy->bydst, chain); __xfrm_policy_link(policy, dir); atomic_inc(&net->xfrm.flow_cache_genid); /* After previous checking, family can either be AF_INET or AF_INET6 */ if (policy->family == AF_INET) rt_genid_bump_ipv4(net); else rt_genid_bump_ipv6(net); if (delpol) { xfrm_policy_requeue(delpol, policy); __xfrm_policy_unlink(delpol, dir); } policy->index = delpol ? delpol->index : xfrm_gen_index(net, dir, policy->index); hlist_add_head(&policy->byidx, net->xfrm.policy_byidx+idx_hash(net, policy->index)); policy->curlft.add_time = get_seconds(); policy->curlft.use_time = 0; if (!mod_timer(&policy->timer, jiffies + HZ)) xfrm_pol_hold(policy); spin_unlock_bh(&net->xfrm.xfrm_policy_lock); if (delpol) xfrm_policy_kill(delpol); else if (xfrm_bydst_should_resize(net, dir, NULL)) schedule_work(&net->xfrm.policy_hash_work); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Alexey Kuznetsov13432.68%413.79%
David S. Miller10024.39%26.90%
Herbert Xu6415.61%413.79%
Fan Du368.78%413.79%
Alexey Dobriyan286.83%413.79%
Steffen Klassert143.41%26.90%
Trent Jaeger112.68%13.45%
Masahide Nakamura51.22%13.45%
Nicolas Dichtel40.98%13.45%
Florian Westphal30.73%13.45%
James Morris30.73%26.90%
Wei Yongjun30.73%13.45%
Ken Helias30.73%13.45%
Jamal Hadi Salim20.49%13.45%
Total410100.00%29100.00%

EXPORT_SYMBOL(xfrm_policy_insert);
struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark, u8 type, int dir, struct xfrm_selector *sel, struct xfrm_sec_ctx *ctx, int delete, int *err) { struct xfrm_policy *pol, *ret; struct hlist_head *chain; *err = 0; spin_lock_bh(&net->xfrm.xfrm_policy_lock); chain = policy_hash_bysel(net, sel, sel->family, dir); ret = NULL; hlist_for_each_entry(pol, chain, bydst) { if (pol->type == type && (mark & pol->mark.m) == pol->mark.v && !selector_cmp(sel, &pol->selector) && xfrm_sec_ctx_match(ctx, pol->security)) { xfrm_pol_hold(pol); if (delete) { *err = security_xfrm_policy_delete( pol->security); if (*err) { spin_unlock_bh(&net->xfrm.xfrm_policy_lock); return pol; } __xfrm_policy_unlink(pol, dir); } ret = pol; break; } } spin_unlock_bh(&net->xfrm.xfrm_policy_lock); if (ret && delete) xfrm_policy_kill(ret); return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Alexey Kuznetsov5123.39%16.25%
David S. Miller4319.72%16.25%
Eric Paris3214.68%16.25%
Herbert Xu2511.47%318.75%
Jamal Hadi Salim198.72%212.50%
Trent Jaeger156.88%16.25%
Fan Du125.50%16.25%
Alexey Dobriyan73.21%212.50%
Masahide Nakamura62.75%16.25%
Florian Westphal31.38%16.25%
Wei Yongjun31.38%16.25%
Paul Moore20.92%16.25%
Total218100.00%16100.00%

EXPORT_SYMBOL(xfrm_policy_bysel_ctx);
struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u8 type, int dir, u32 id, int delete, int *err) { struct xfrm_policy *pol, *ret; struct hlist_head *chain; *err = -ENOENT; if (xfrm_policy_id2dir(id) != dir) return NULL; *err = 0; spin_lock_bh(&net->xfrm.xfrm_policy_lock); chain = net->xfrm.policy_byidx + idx_hash(net, id); ret = NULL; hlist_for_each_entry(pol, chain, byidx) { if (pol->type == type && pol->index == id && (mark & pol->mark.m) == pol->mark.v) { xfrm_pol_hold(pol); if (delete) { *err = security_xfrm_policy_delete( pol->security); if (*err) { spin_unlock_bh(&net->xfrm.xfrm_policy_lock); return pol; } __xfrm_policy_unlink(pol, dir); } ret = pol; break; } } spin_unlock_bh(&net->xfrm.xfrm_policy_lock); if (ret && delete) xfrm_policy_kill(ret); return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Alexey Kuznetsov5726.51%16.25%
David S. Miller3817.67%16.25%
Herbert Xu3214.88%318.75%
Eric Paris3214.88%16.25%
Jamal Hadi Salim198.84%212.50%
Alexey Dobriyan125.58%318.75%
Fan Du125.58%16.25%
Masahide Nakamura52.33%16.25%
Florian Westphal31.40%16.25%
Wei Yongjun31.40%16.25%
Paul Moore20.93%16.25%
Total215100.00%16100.00%

EXPORT_SYMBOL(xfrm_policy_byid); #ifdef CONFIG_SECURITY_NETWORK_XFRM
static inline int xfrm_policy_flush_secctx_check(struct net *net, u8 type, bool task_valid) { int dir, err = 0; for (dir = 0; dir < XFRM_POLICY_MAX; dir++) { struct xfrm_policy *pol; int i; hlist_for_each_entry(pol, &net->xfrm.policy_inexact[dir], bydst) { if (pol->type != type) continue; err = security_xfrm_policy_delete(pol->security); if (err) { xfrm_audit_policy_delete(pol, 0, task_valid); return err; } } for (i = net->xfrm.policy_bydst[dir].hmask; i >= 0; i--) { hlist_for_each_entry(pol, net->xfrm.policy_bydst[dir].table + i, bydst) { if (pol->type != type) continue; err = security_xfrm_policy_delete( pol->security); if (err) { xfrm_audit_policy_delete(pol, 0, task_valid); return err; } } } } return err; }

Contributors

PersonTokensPropCommitsCommitProp
Joy Latten14788.02%233.33%
Alexey Dobriyan127.19%233.33%
Paul Moore42.40%116.67%
Tetsuo Handa42.40%116.67%
Total167100.00%6100.00%

#else
static inline int xfrm_policy_flush_secctx_check(struct net *net, u8 type, bool task_valid) { return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Joy Latten1466.67%133.33%
Alexey Dobriyan523.81%133.33%
Tetsuo Handa29.52%133.33%
Total21100.00%3100.00%

#endif
int xfrm_policy_flush(struct net *net, u8 type, bool task_valid) { int dir, err = 0, cnt = 0; spin_lock_bh(&net->xfrm.xfrm_policy_lock); err = xfrm_policy_flush_secctx_check(net, type, task_valid); if (err) goto out; for (dir = 0; dir < XFRM_POLICY_MAX; dir++) { struct xfrm_policy *pol; int i; again1: hlist_for_each_entry(pol, &net->xfrm.policy_inexact[dir], bydst) { if (pol->type != type) continue; __xfrm_policy_unlink(pol, dir); spin_unlock_bh(&net->xfrm.xfrm_policy_lock); cnt++; xfrm_audit_policy_delete(pol, 1, task_valid); xfrm_policy_kill(pol); spin_lock_bh(&net->xfrm.xfrm_policy_lock); goto again1; } for (i = net->xfrm.policy_bydst[dir].hmask; i >= 0; i--) { again2: hlist_for_each_entry(pol, net->xfrm.policy_bydst[dir].table + i, bydst) { if (pol->type != type) continue; __xfrm_policy_unlink(pol, dir); spin_unlock_bh(&net->xfrm.xfrm_policy_lock); cnt++; xfrm_audit_policy_delete(pol, 1, task_valid); xfrm_policy_kill(pol); spin_lock_bh(&net->xfrm.xfrm_policy_lock); goto again2; } } } if (!cnt) err = -ESRCH; out: spin_unlock_bh(&net->xfrm.xfrm_policy_lock); if (cnt) xfrm_garbage_collect(net); return err; }

Contributors

PersonTokensPropCommitsCommitProp
David S. Miller8430.88%15.56%
Alexey Kuznetsov5118.75%15.56%
Joy Latten4215.44%316.67%
Fan Du248.82%15.56%
Jamal Hadi Salim217.72%15.56%
Alexey Dobriyan145.15%211.11%
Wei Yongjun103.68%211.11%
Xin Long93.31%15.56%
Florian Westphal51.84%15.56%
Tetsuo Handa51.84%15.56%
Herbert Xu20.74%15.56%
Masahide Nakamura20.74%15.56%
Linus Torvalds20.74%15.56%
Steffen Klassert10.37%15.56%
Total272100.00%18100.00%

EXPORT_SYMBOL(xfrm_policy_flush);
int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk, int (*func)(struct xfrm_policy *, int, int, void*), void *data) { struct xfrm_policy *pol; struct xfrm_policy_walk_entry *x; int error = 0; if (walk->type >= XFRM_POLICY_TYPE_MAX && walk->type != XFRM_POLICY_TYPE_ANY) return -EINVAL; if (list_empty(&walk->walk.all) && walk->seq != 0) return 0; spin_lock_bh(&net->xfrm.xfrm_policy_lock); if (list_empty(&walk->walk.all)) x = list_first_entry(&net->xfrm.policy_all, struct xfrm_policy_walk_entry, all); else x = list_first_entry(&walk->walk.all, struct xfrm_policy_walk_entry, all); list_for_each_entry_from(x, &net->xfrm.policy_all, all) { if (x->dead) continue; pol = container_of(x, struct xfrm_policy, walk); if (walk->type != XFRM_POLICY_TYPE_ANY && walk->type != pol->type) continue; error = func(pol, xfrm_policy_id2dir(pol->index), walk->seq, data); if (error) { list_move_tail(&walk->walk.all, &x->all); goto out; } walk->seq++; } if (walk->seq == 0) { error = -ENOENT; goto out; } list_del_init(&walk->walk.all); out: spin_unlock_bh(&net->xfrm.xfrm_policy_lock); return error; }

Contributors

PersonTokensPropCommitsCommitProp
Herbert Xu9131.82%18.33%
Timo Teräs6322.03%18.33%
David S. Miller4315.03%18.33%
Alexey Kuznetsov3913.64%216.67%
Jamal Hadi Salim248.39%18.33%
Alexey Dobriyan113.85%216.67%
Fan Du82.80%18.33%
Masahide Nakamura41.40%18.33%
Florian Westphal20.70%18.33%
Li RongQing10.35%18.33%
Total286100.00%12100.00%

EXPORT_SYMBOL(xfrm_policy_walk);
void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type) { INIT_LIST_HEAD(&walk->walk.all); walk->walk.dead = 1; walk->type = type; walk->seq = 0; }

Contributors

PersonTokensPropCommitsCommitProp
Herbert Xu43100.00%1100.00%
Total43100.00%1100.00%

EXPORT_SYMBOL(xfrm_policy_walk_init);
void xfrm_policy_walk_done(struct xfrm_policy_walk *walk, struct net *net) { if (list_empty(&walk->walk.all)) return; spin_lock_bh(&net->xfrm.xfrm_policy_lock); /*FIXME where is net? */ list_del(&walk->walk.all); spin_unlock_bh(&net->xfrm.xfrm_policy_lock); }

Contributors

PersonTokensPropCommitsCommitProp
Herbert Xu3661.02%120.00%
Fan Du1423.73%120.00%
Timo Teräs610.17%120.00%
Florian Westphal23.39%120.00%
David S. Miller11.69%120.00%
Total59100.00%5100.00%

EXPORT_SYMBOL(xfrm_policy_walk_done); /* * Find policy to apply to this flow. * * Returns 0 if policy found, else an -errno. */
static int xfrm_policy_match(const struct xfrm_policy *pol, const struct flowi *fl, u8 type, u16 family, int dir) { const struct xfrm_selector *sel = &pol->selector; int ret = -ESRCH; bool match; if (pol->family != family || (fl->flowi_mark & pol->mark.m) != pol->mark.v || pol->type != type) return ret; match = xfrm_selector_match(sel, fl, family); if (match) ret = security_xfrm_policy_lookup(pol->security, fl->flowi_secid, dir); return ret; }

Contributors

PersonTokensPropCommitsCommitProp
David S. Miller7363.48%550.00%
Jamal Hadi Salim1714.78%110.00%
Alexey Kuznetsov1412.17%220.00%
James Morris97.83%110.00%
Paul Moore21.74%110.00%
Total115100.00%10100.00%


static struct xfrm_policy *xfrm_policy_lookup_bytype(struct net *net, u8 type, const struct flowi *fl, u16 family, u8 dir) { int err; struct xfrm_policy *pol, *ret; const xfrm_address_t *daddr, *saddr; struct hlist_head *chain; unsigned int sequence; u32 priority; daddr = xfrm_flowi_daddr(fl, family); saddr = xfrm_flowi_saddr(fl, family); if (unlikely(!daddr || !saddr)) return NULL; rcu_read_lock(); retry: do { sequence = read_seqcount_begin(&xfrm_policy_hash_generation); chain = policy_hash_direct(net, daddr, saddr, family, dir); } while (read_seqcount_retry(&xfrm_policy_hash_generation, sequence)); priority = ~0U; ret = NULL; hlist_for_each_entry_rcu(pol, chain, bydst) { err = xfrm_policy_match(pol, fl, type, family, dir); if (err) { if (err == -ESRCH) continue; else { ret = ERR_PTR(err); goto fail; } } else { ret = pol; priority = ret->priority; break; } } chain = &net->xfrm.policy_inexact[dir]; hlist_for_each_entry_rcu(pol, chain, bydst) { if ((pol->priority >= priority) && ret) break; err = xfrm_policy_match(pol, fl, type, family, dir); if (err) { if (err == -ESRCH) continue; else { ret = ERR_PTR(err); goto fail; } } else { ret = pol; break; } } if (read_seqcount_retry(&xfrm_policy_hash_generation, sequence)) goto retry; if (ret && !xfrm_pol_hold_rcu(ret)) goto retry; fail: rcu_read_unlock(); return ret; }

Contributors

PersonTokensPropCommitsCommitProp
David S. Miller12437.92%523.81%
James Morris6519.88%14.76%
Florian Westphal6218.96%419.05%
Alexey Kuznetsov247.34%14.76%
Li RongQing144.28%14.76%
Masahide Nakamura133.98%14.76%
Alexey Dobriyan123.67%314.29%
Trent Jaeger72.14%14.76%
Hideaki Yoshifuji / 吉藤英明20.61%14.76%
Kazunori Miyazawa20.61%14.76%
Herbert Xu10.31%14.76%
Venkat Yekkirala10.31%14.76%
Total327100.00%21100.00%


static struct xfrm_policy * __xfrm_policy_lookup(struct net *net, const struct flowi *fl, u16 family, u8 dir) { #ifdef CONFIG_XFRM_SUB_POLICY struct xfrm_policy *pol; pol = xfrm_policy_lookup_bytype(net, XFRM_POLICY_TYPE_SUB, fl, family, dir); if (pol != NULL) return pol; #endif return xfrm_policy_lookup_bytype(net, XFRM_POLICY_TYPE_MAIN, fl, family, dir); }

Contributors

PersonTokensPropCommitsCommitProp
Masahide Nakamura4663.01%116.67%
Timo Teräs1419.18%233.33%
Alexey Dobriyan912.33%116.67%
James Morris34.11%116.67%
David S. Miller11.37%116.67%
Total73100.00%6100.00%


static int flow_to_policy_dir(int dir) { if (XFRM_POLICY_IN == FLOW_DIR_IN && XFRM_POLICY_OUT == FLOW_DIR_OUT && XFRM_POLICY_FWD == FLOW_DIR_FWD) return dir; switch (dir) { default: case FLOW_DIR_IN: return XFRM_POLICY_IN; case FLOW_DIR_OUT: return XFRM_POLICY_OUT; case FLOW_DIR_FWD: return XFRM_POLICY_FWD; } }

Contributors

PersonTokensPropCommitsCommitProp
Baker Zhang51100.00%1100.00%
Total51100.00%1100.00%


static struct flow_cache_object * xfrm_policy_lookup(struct net *net, const struct flowi *fl, u16 family, u8 dir, struct flow_cache_object *old_obj, void *ctx) { struct xfrm_policy *pol; if (old_obj) xfrm_pol_put(container_of(old_obj, struct xfrm_policy, flo)); pol = __xfrm_policy_lookup(net, fl, family, flow_to_policy_dir(dir)); if (IS_ERR_OR_NULL(pol)) return ERR_CAST(pol); /* Resolver returns two references: * one for cache and one for caller of flow_cache_lookup() */ xfrm_pol_hold(pol); return &pol->flo; }

Contributors

PersonTokensPropCommitsCommitProp
Timo Teräs8890.72%228.57%
David S. Miller33.09%228.57%
Baker Zhang33.09%114.29%
James Morris22.06%114.29%
Alexey Kuznetsov11.03%114.29%
Total97100.00%7100.00%


static inline int policy_to_flow_dir(int dir) { if (XFRM_POLICY_IN == FLOW_DIR_IN && XFRM_POLICY_OUT == FLOW_DIR_OUT && XFRM_POLICY_FWD == FLOW_DIR_FWD) return dir; switch (dir) { default: case XFRM_POLICY_IN: return FLOW_DIR_IN; case XFRM_POLICY_OUT: return FLOW_DIR_OUT; case XFRM_POLICY_FWD: return FLOW_DIR_FWD; } }

Contributors

PersonTokensPropCommitsCommitProp
Trent Jaeger52100.00%1100.00%
Total52100.00%1100.00%


static struct xfrm_policy *xfrm_sk_policy_lookup(const struct sock *sk, int dir, const struct flowi *fl, u16 family) { struct xfrm_policy *pol; rcu_read_lock(); again: pol = rcu_dereference(sk->sk_policy[dir]); if (pol != NULL) { bool match = xfrm_selector_match(&pol->selector, fl, family); int err = 0; if (match) { if ((sk->sk_mark & pol->mark.m) != pol->mark.v) { pol = NULL; goto out; } err = security_xfrm_policy_lookup(pol->security, fl->flowi_secid, policy_to_flow_dir(dir)); if (!err) { if (!xfrm_pol_hold_rcu(pol)) goto again; } else if (err == -ESRCH) { pol = NULL; } else { pol = ERR_PTR(err); } } else pol = NULL; } out: rcu_read_unlock(); return pol; }

Contributors

PersonTokensPropCommitsCommitProp
Alexey Kuznetsov5127.72%210.53%
Jamal Hadi Salim3116.85%15.26%
Trent Jaeger2413.04%15.26%
Venkat Yekkirala2413.04%210.53%
Florian Westphal179.24%210.53%
Eric Dumazet147.61%210.53%
Kazunori Miyazawa94.89%15.26%
Steffen Klassert42.17%15.26%
David S. Miller31.63%315.79%
Arnaldo Carvalho de Melo31.63%15.26%
Paul Moore21.09%15.26%
Adrian Bunk10.54%15.26%
Hideaki Yoshifuji / 吉藤英明10.54%15.26%
Total184100.00%19100.00%


static void __xfrm_policy_link(struct xfrm_policy *pol, int dir) { struct net *net = xp_net(pol); list_add(&pol->walk.all, &net->xfrm.policy_all); net->xfrm.policy_count[dir]++; xfrm_pol_hold(pol); }

Contributors

PersonTokensPropCommitsCommitProp
Alexey Kuznetsov2035.71%110.00%
Alexey Dobriyan1933.93%330.00%
Herbert Xu1425.00%330.00%
James Morris11.79%110.00%
David S. Miller11.79%110.00%
Masahide Nakamura11.79%110.00%
Total56100.00%10100.00%


static struct xfrm_policy *__xfrm_policy_unlink(struct xfrm_policy *pol, int dir) { struct net *net = xp_net(pol); if (list_empty(&pol->walk.all)) return NULL; /* Socket policies are not hashed. */ if (!hlist_unhashed(&pol->bydst)) { hlist_del_rcu(&pol->bydst); hlist_del(&pol->byidx); } list_del_init(&pol->walk.all); net->xfrm.policy_count[dir]--; return pol; }

Contributors

PersonTokensPropCommitsCommitProp
Herbert Xu3739.36%333.33%
David S. Miller2122.34%111.11%
Alexey Kuznetsov1617.02%111.11%
Alexey Dobriyan1515.96%222.22%
Masahide Nakamura44.26%111.11%
Florian Westphal11.06%111.11%
Total94100.00%9100.00%


static void xfrm_sk_policy_link(struct xfrm_policy *pol, int dir) { __xfrm_policy_link(pol, XFRM_POLICY_MAX + dir); }

Contributors

PersonTokensPropCommitsCommitProp
Herbert Xu23100.00%1100.00%
Total23100.00%1100.00%


static void xfrm_sk_policy_unlink(struct xfrm_policy *pol, int dir) { __xfrm_policy_unlink(pol, XFRM_POLICY_MAX + dir); }

Contributors

PersonTokensPropCommitsCommitProp
Herbert Xu23100.00%1100.00%
Total23100.00%1100.00%


int xfrm_policy_delete(struct xfrm_policy *pol, int dir) { struct net *net = xp_net(pol); spin_lock_bh(&net->xfrm.xfrm_policy_lock); pol = __xfrm_policy_unlink(pol, dir); spin_unlock_bh(&net->xfrm.xfrm_policy_lock); if (pol) { xfrm_policy_kill(pol); return 0; } return -ENOENT; }

Contributors

PersonTokensPropCommitsCommitProp
Herbert Xu4767.14%233.33%
Fan Du1825.71%116.67%
Eugene Surovegin22.86%116.67%
Florian Westphal22.86%116.67%
Alexey Kuznetsov11.43%116.67%
Total70100.00%6100.00%

EXPORT_SYMBOL(xfrm_policy_delete);
int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol) { struct net *net = xp_net(pol); struct xfrm_policy *old_pol; #ifdef CONFIG_XFRM_SUB_POLICY if (pol && pol->type != XFRM_POLICY_TYPE_MAIN) return -EINVAL; #endif spin_lock_bh(&net->xfrm.xfrm_policy_lock); old_pol = rcu_dereference_protected(sk->sk_policy[dir], lockdep_is_held(&net->xfrm.xfrm_policy_lock)); if (pol) { pol->curlft.add_time = get_seconds(); pol->index = xfrm_gen_index(net, XFRM_POLICY_MAX+dir, 0); xfrm_sk_policy_link(pol, dir); } rcu_assign_pointer(sk->sk_policy[dir], pol); if (old_pol) { if (pol) xfrm_policy_requeue(old_pol, pol); /* Unlinking succeeds always. This is the only function * allowed to delete or replace socket policy. */ xfrm_sk_policy_unlink(old_pol, dir); } spin_unlock_bh(&net->xfrm.xfrm_policy_lock); if (old_pol) { xfrm_policy_kill(old_pol); } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Alexey Kuznetsov9652.75%215.38%
Eric Dumazet2413.19%17.69%
Masahide Nakamura1910.44%17.69%
Steffen Klassert137.14%17.69%
Alexey Dobriyan126.59%17.69%
Fan Du105.49%215.38%
Florian Westphal21.10%17.69%
James Morris21.10%17.69%
Herbert Xu21.10%17.69%
Timo Teräs10.55%17.69%
Arnaldo Carvalho de Melo10.55%17.69%
Total182100.00%13100.00%


static struct xfrm_policy *clone_policy(const struct xfrm_policy *old, int dir) { struct xfrm_policy *newp = xfrm_policy_alloc(xp_net(old), GFP_ATOMIC); struct net *net = xp_net(old); if (newp) { newp->selector = old->selector; if (security_xfrm_policy_clone(old->security, &newp->security)) { kfree(newp); return NULL; /* ENOMEM */ } newp->lft = old->lft; newp->curlft = old->curlft; newp->mark = old->mark; newp->action = old->action; newp->flags = old->flags; newp->xfrm_nr = old->xfrm_nr; newp->index = old->index; newp->type = old->type; memcpy(newp->xfrm_vec, old->xfrm_vec, newp->xfrm_nr*sizeof(struct xfrm_tmpl)); spin_lock_bh(&net->xfrm.xfrm_policy_lock); xfrm_sk_policy_link(newp, dir); spin_unlock_bh(&net->xfrm.xfrm_policy_lock); xfrm_pol_put(newp); } return newp; }

Contributors

PersonTokensPropCommitsCommitProp
Alexey Kuznetsov12361.19%428.57%
Trent Jaeger209.95%17.14%
Fan Du188.96%17.14%
Masahide Nakamura136.47%17.14%
Jamal Hadi Salim83.98%17.14%
Herbert Xu62.99%214.29%
Alexey Dobriyan52.49%17.14%
Paul Moore52.49%17.14%
Florian Westphal21.00%17.14%
David S. Miller10.50%17.14%
Total201100.00%14100.00%


int __xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk) { const struct xfrm_policy *p; struct xfrm_policy *np; int i, ret = 0; rcu_read_lock(); for (i = 0; i < 2; i++) { p = rcu_dereference(osk->sk_policy[i]); if (p) { np = clone_policy(p, i); if (unlikely(!np)) { ret = -ENOMEM; break; } rcu_assign_pointer(sk->sk_policy[i], np); } } rcu_read_unlock(); return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Eric Dumazet7162.83%120.00%
Alexey Kuznetsov3732.74%360.00%
Arnaldo Carvalho de Melo54.42%120.00%
Total113100.00%5100.00%


static int xfrm_get_saddr(struct net *net, int oif, xfrm_address_t *local, xfrm_address_t *remote, unsigned short family) { int err; const struct xfrm_policy_afinfo *afinfo = xfrm_policy_get_afinfo(family); if (unlikely(afinfo == NULL)) return -EINVAL; err = afinfo->get_saddr(net, oif, local, remote); rcu_read_unlock(); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Patrick McHardy5979.73%120.00%
Alexey Dobriyan79.46%120.00%
David Ahern56.76%120.00%
Florian Westphal34.05%240.00%
Total74100.00%5100.00%

/* Resolve list of templates for the flow, given policy. */
static int xfrm_tmpl_resolve_one(struct xfrm_policy *policy, const struct flowi *fl, struct xfrm_state **xfrm, unsigned short family) { struct net *net = xp_net(policy); int nx; int i, error; xfrm_address_t *daddr = xfrm_flowi_daddr(fl, family); xfrm_address_t *saddr = xfrm_flowi_saddr(fl, family); xfrm_address_t tmp; for (nx = 0, i = 0; i < policy->xfrm_nr; i++) { struct xfrm_state *x; xfrm_address_t *remote = daddr; xfrm_address_t *local = saddr; struct xfrm_tmpl *tmpl = &policy->xfrm_vec[i]; if (tmpl->mode == XFRM_MODE_TUNNEL || tmpl->mode == XFRM_MODE_BEET) { remote = &tmpl->id.daddr; local = &tmpl->saddr; if (xfrm_addr_any(local, tmpl->encap_family)) { error = xfrm_get_saddr(net, fl->flowi_oif, &tmp, remote, tmpl->encap_family); if (error) goto fail; local = &tmp; } } x = xfrm_state_find(remote, local, fl, tmpl, policy, &error, family); if (x && x->km.state == XFRM_STATE_VALID) { xfrm[nx++] = x; daddr = remote; saddr = local; continue; } if (x) { error = (x->km.state == XFRM_STATE_ERROR ? -EINVAL : -EAGAIN); xfrm_state_put(x); } else if (error == -ESRCH) { error = -EAGAIN; } if (!tmpl->optional) goto fail; } return nx; fail: for (nx--; nx >= 0; nx--) xfrm_state_put(xfrm[nx]); return error; }

Contributors

PersonTokensPropCommitsCommitProp
Alexey Kuznetsov22166.77%321.43%
Patrick McHardy3610.88%17.14%
Hideaki Yoshifuji / 吉藤英明278.16%17.14%
Fernando Luis Vázquez Cao133.93%17.14%
Alexey Dobriyan123.63%17.14%
Joakim Koskela61.81%17.14%
Thomas Egerer61.81%17.14%
David Ahern41.21%17.14%
Masahide Nakamura30.91%214.29%
Weilong Chen20.60%17.14%
David S. Miller10.30%17.14%
Total331100.00%14100.00%


static int xfrm_tmpl_resolve(struct xfrm_policy **pols, int npols, const struct flowi *fl, struct xfrm_state **xfrm, unsigned short family) { struct xfrm_state *tp[XFRM_MAX_DEPTH]; struct xfrm_state **tpp = (npols > 1) ? tp : xfrm; int cnx = 0; int error; int ret; int i; for (i = 0; i < npols; i++) { if (cnx + pols[i]->xfrm_nr >= XFRM_MAX_DEPTH) { error = -ENOBUFS; goto fail; } ret = xfrm_tmpl_resolve_one(pols[i], fl, &tpp[cnx], family); if (ret < 0) { error = ret; goto fail; } else cnx += ret; } /* found states are sorted for outbound processing */ if (npols > 1) xfrm_state_sort(xfrm, tpp, cnx, family); return cnx; fail: for (cnx--; cnx >= 0; cnx--) xfrm_state_put(tpp[cnx]); return error; }

Contributors

PersonTokensPropCommitsCommitProp
Masahide Nakamura19299.48%266.67%
David S. Miller10.52%133.33%
Total193100.00%3100.00%


static int xfrm_get_tos(const struct flowi *fl, int family) { const struct xfrm_policy_afinfo *afinfo; int tos = 0; afinfo = xfrm_policy_get_afinfo(family); tos = afinfo ? afinfo->get_tos(fl) : 0; rcu_read_unlock(); return tos; }

Contributors

PersonTokensPropCommitsCommitProp
Florian Westphal1528.85%333.33%
Hideaki Yoshifuji / 吉藤英明1426.92%111.11%
Alexey Kuznetsov1121.15%222.22%
Timo Teräs917.31%111.11%
Kazunori Miyazawa23.85%111.11%
David S. Miller11.92%111.11%
Total52100.00%9100.00%


static struct flow_cache_object *xfrm_bundle_flo_get(struct flow_cache_object *flo) { struct xfrm_dst *xdst = container_of(flo, struct xfrm_dst, flo); struct dst_entry *dst = &xdst->u.dst; if (xdst->route == NULL) { /* Dummy bundle - if it has xfrms we were not * able to build bundle as template resolution failed. * It means we need to try again resolving. */ if (xdst->num_xfrms > 0) return NULL; } else if (dst->flags & DST_XFRM_QUEUE) { return NULL; } else { /* Real bundle */ if (stale_bundle(dst)) return NULL; } dst_hold(dst); return flo; }

Contributors

PersonTokensPropCommitsCommitProp
Timo Teräs5859.18%114.29%
Steffen Klassert1414.29%114.29%
Kazunori Miyazawa99.18%114.29%
Hideaki Yoshifuji / 吉藤英明99.18%114.29%
Alexey Kuznetsov77.14%228.57%
Herbert Xu11.02%114.29%
Total98100.00%7100.00%


static int xfrm_bundle_flo_check(struct flow_cache_object *flo) { struct xfrm_dst *xdst = container_of(flo, struct xfrm_dst, flo); struct dst_entry *dst = &xdst->u.dst; if (!xdst->route) return 0; if (stale_bundle(dst)) return 0; return 1; }

Contributors

PersonTokensPropCommitsCommitProp
Timo Teräs4065.57%125.00%
Masahide Nakamura1016.39%125.00%
Herbert Xu914.75%125.00%
Alexey Dobriyan23.28%125.00%
Total61100.00%4100.00%


static void xfrm_bundle_flo_delete(struct flow_cache_object *flo) { struct xfrm_dst *xdst = container_of(flo, struct xfrm_dst, flo); struct dst_entry *dst = &xdst->u.dst; dst_free(dst); }

Contributors

PersonTokensPropCommitsCommitProp
Timo Teräs43100.00%1100.00%
Total43100.00%1100.00%

static const struct flow_cache_ops xfrm_bundle_fc_ops = { .get = xfrm_bundle_flo_get, .check = xfrm_bundle_flo_check, .delete = xfrm_bundle_flo_delete, };
static inline struct xfrm_dst *xfrm_alloc_dst(struct net *net, int family) { const struct xfrm_policy_afinfo *afinfo = xfrm_policy_get_afinfo(family); struct dst_ops *dst_ops; struct xfrm_dst *xdst; if (!afinfo) return ERR_PTR(-EINVAL); switch (family) { case AF_INET: dst_ops = &net->xfrm.xfrm4_dst_ops; break; #if IS_ENABLED(CONFIG_IPV6) case AF_INET6: dst_ops = &net->xfrm.xfrm6_dst_ops; break; #endif default: BUG(); } xdst = dst_alloc(dst_ops, NULL, 0, DST_OBSOLETE_NONE, 0); if (likely(xdst)) { struct dst_entry *dst = &xdst->u.dst; memset(dst + 1, 0, sizeof(*xdst) - sizeof(*dst)); xdst->flo.ops = &xfrm_bundle_fc_ops; } else xdst = ERR_PTR(-ENOBUFS); rcu_read_unlock(); return xdst; }

Contributors

PersonTokensPropCommitsCommitProp
Timo Teräs5632.00%17.14%
Alexey Dobriyan4324.57%17.14%
David S. Miller2715.43%428.57%
Steffen Klassert148.00%17.14%
Madalin Bucur105.71%17.14%
Hiroaki SHIMODA95.14%17.14%
Herbert Xu74.00%17.14%
Masahide Nakamura52.86%17.14%
Florian Westphal31.71%214.29%
Eric Dumazet10.57%17.14%
Total175100.00%14100.00%


static inline int xfrm_init_path(struct xfrm_dst *path, struct dst_entry *dst, int nfheader_len) { const struct xfrm_policy_afinfo *afinfo = xfrm_policy_get_afinfo(dst->ops->family); int err; if (!afinfo) return -EINVAL; err = afinfo->init_path(path, dst, nfheader_len); rcu_read_unlock(); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Masahide Nakamura6395.45%133.33%
Florian Westphal34.55%266.67%
Total66100.00%3100.00%


static inline int xfrm_fill_dst(struct xfrm_dst *xdst, struct net_device *dev, const struct flowi *fl) { const struct xfrm_policy_afinfo *afinfo = xfrm_policy_get_afinfo(xdst->u.dst.ops->family); int err; if (!afinfo) return -EINVAL; err = afinfo->fill_dst(xdst, dev, fl); rcu_read_unlock(); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Herbert Xu4663.01%233.33%
Masahide Nakamura2331.51%116.67%
Florian Westphal34.11%233.33%
David S. Miller11.37%116.67%
Total73100.00%6100.00%

/* Allocate chain of dst_entry's, attach known xfrm's, calculate * all the metrics... Shortly, bundle a bundle. */
static struct dst_entry *xfrm_bundle_create(struct xfrm_policy *policy, struct xfrm_state **xfrm, int nx, const struct flowi *fl, struct dst_entry *dst) { struct net *net = xp_net(policy); unsigned long now = jiffies; struct net_device *dev; struct xfrm_mode *inner_mode; struct dst_entry *dst_prev = NULL; struct dst_entry *dst0 = NULL; int i = 0; int err; int header_len = 0; int nfheader_len = 0; int trailer_len = 0; int tos; int family = policy->selector.family; xfrm_address_t saddr, daddr; xfrm_flowi_addr_get(fl, &saddr, &daddr, family); tos = xfrm_get_tos(fl, family); dst_hold(dst); for (; i < nx; i++) { struct xfrm_dst *xdst = xfrm_alloc_dst(net, family); struct dst_entry *dst1 = &xdst->u.dst; err = PTR_ERR(xdst); if (IS_ERR(xdst)) { dst_release(dst); goto put_states; } if (xfrm[i]->sel.family == AF_UNSPEC) { inner_mode = xfrm_ip2inner_mode(xfrm[i], xfrm_af2proto(family)); if (!inner_mode) { err = -EAFNOSUPPORT; dst_release(dst); goto put_states; } } else inner_mode = xfrm[i]->inner_mode; if (!dst_prev) dst0 = dst1; else { dst_prev->child = dst_clone(dst1); dst1->flags |= DST_NOHASH; } xdst->route = dst; dst_copy_metrics(dst1, dst); if (xfrm[i]->props.mode != XFRM_MODE_TRANSPORT) { family = xfrm[i]->props.family; dst = xfrm_dst_lookup(xfrm[i], tos, fl->flowi_oif, &saddr, &daddr, family); err = PTR_ERR(dst); if (IS_ERR(dst)) goto put_states; } else dst_hold(dst); dst1->xfrm = xfrm[i]; xdst->xfrm_genid = xfrm[i]->genid; dst1->obsolete = DST_OBSOLETE_FORCE_CHK; dst1->flags |= DST_HOST; dst1->lastuse = now; dst1->input = dst_discard; dst1->output = inner_mode->afinfo->output; dst1->next = dst_prev; dst_prev = dst1; header_len += xfrm[i]->props.header_len; if (xfrm[i]->type->flags & XFRM_TYPE_NON_FRAGMENT) nfheader_len += xfrm[i]->props.header_len; trailer_len += xfrm[i]->props.trailer_len; } dst_prev->child = dst; dst0->path = dst; err = -ENODEV; dev = dst->dev; if (!dev) goto free_dst; xfrm_init_path((struct xfrm_dst *)dst0, dst, nfheader_len); xfrm_init_pmtu(dst_prev); for (dst_prev = dst0; dst_prev != dst; dst_prev = dst_prev->child) { struct xfrm_dst *xdst = (struct xfrm_dst *)dst_prev; err = xfrm_fill_dst(xdst, dev, fl); if (err) goto free_dst; dst_prev->header_len = header_len; dst_prev->trailer_len = trailer_len; header_len -= xdst->u.dst.xfrm->props.header_len; trailer_len -= xdst->u.dst.xfrm->props.trailer_len; } out: return dst0; put_states: for (; i < nx; i++) xfrm_state_put(xfrm[i]); free_dst: if (dst0) dst_free(dst0); dst0 = ERR_PTR(err); goto out; }

Contributors

PersonTokensPropCommitsCommitProp
Herbert Xu51076.46%216.67%
Steffen Klassert669.90%18.33%
Masahide Nakamura477.05%216.67%
Hideaki Yoshifuji / 吉藤英明243.60%18.33%
Alexey Dobriyan121.80%18.33%
David Ahern40.60%18.33%
David S. Miller30.45%325.00%
Timo Teräs10.15%18.33%
Total667100.00%12100.00%

#ifdef CONFIG_XFRM_SUB_POLICY
static int xfrm_dst_alloc_copy(void **target, const void *src, int size) { if (!*target) { *target = kmalloc(size, GFP_ATOMIC); if (!*target) return -ENOMEM; } memcpy(*target, src, size); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Herbert Xu5998.33%150.00%
David S. Miller11.67%150.00%
Total60100.00%2100.00%

#endif
static int xfrm_dst_update_parent(struct dst_entry *dst, const struct xfrm_selector *sel) { #ifdef CONFIG_XFRM_SUB_POLICY struct xfrm_dst *xdst = (struct xfrm_dst *)dst; return xfrm_dst_alloc_copy((void **)&(xdst->partner), sel, sizeof(*sel)); #else return 0; #endif }

Contributors

PersonTokensPropCommitsCommitProp
Herbert Xu6298.41%150.00%
David S. Miller11.59%150.00%
Total63100.00%2100.00%


static int xfrm_dst_update_origin(struct dst_entry *dst, const struct flowi *fl) { #ifdef CONFIG_XFRM_SUB_POLICY struct xfrm_dst *xdst = (struct xfrm_dst *)dst; return xfrm_dst_alloc_copy((void **)&(xdst->origin), fl, sizeof(*fl)); #else return 0; #endif }

Contributors

PersonTokensPropCommitsCommitProp
Masahide Nakamura5282.54%133.33%
Herbert Xu1015.87%133.33%
David S. Miller11.59%133.33%
Total63100.00%3100.00%


static int xfrm_expand_policies(const struct flowi *fl, u16 family, struct xfrm_policy **pols, int *num_pols, int *num_xfrms) { int i; if (*num_pols == 0 || !pols[0]) { *num_pols = 0; *num_xfrms = 0; return 0; } if (IS_ERR(pols[0])) return PTR_ERR(pols[0]); *num_xfrms = pols[0]->xfrm_nr; #ifdef CONFIG_XFRM_SUB_POLICY if (pols[0] && pols[0]->action == XFRM_POLICY_ALLOW && pols[0]->type != XFRM_POLICY_TYPE_MAIN) { pols[1] = xfrm_policy_lookup_bytype(xp_net(pols[0]), XFRM_POLICY_TYPE_MAIN, fl, family, XFRM_POLICY_OUT); if (pols[1]) { if (IS_ERR(pols[1])) { xfrm_pols_put(pols, *num_pols); return PTR_ERR(pols[1]); } (*num_pols)++; (*num_xfrms) += pols[1]->xfrm_nr; } } #endif for (i = 0; i < *num_pols; i++) { if (pols[i]->action != XFRM_POLICY_ALLOW) { *num_xfrms = -1; break; } } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Timo Teräs14761.25%212.50%
Masahide Nakamura3514.58%318.75%
Hideaki Yoshifuji / 吉藤英明2510.42%16.25%
Kazunori Miyazawa166.67%16.25%
James Morris62.50%16.25%
Herbert Xu31.25%212.50%
David S. Miller31.25%212.50%
Alexey Dobriyan20.83%16.25%
Patrick McHardy10.42%16.25%
Alexey Kuznetsov10.42%16.25%
Venkat Yekkirala10.42%16.25%
Total240100.00%16100.00%


static struct xfrm_dst * xfrm_resolve_and_create_bundle(struct xfrm_policy **pols, int num_pols, const struct flowi *fl, u16 family, struct dst_entry *dst_orig) { struct net *net = xp_net(pols[0]); struct xfrm_state *xfrm[XFRM_MAX_DEPTH]; struct dst_entry *dst; struct xfrm_dst *xdst; int err; /* Try to instantiate a bundle */ err = xfrm_tmpl_resolve(pols, num_pols, fl, xfrm, family); if (err <= 0) { if (err != 0 && err != -EAGAIN) XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTPOLERROR); return ERR_PTR(err); } dst = xfrm_bundle_create(pols[0], xfrm, err, fl, dst_orig); if (IS_ERR(dst)) { XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTBUNDLEGENERROR); return ERR_CAST(dst); } xdst = (struct xfrm_dst *)dst; xdst->num_xfrms = err; if (num_pols > 1) err = xfrm_dst_update_parent(dst, &pols[1]->selector); else err = xfrm_dst_update_origin(dst, fl); if (unlikely(err)) { dst_free(dst); XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTBUNDLECHECKERROR); return ERR_PTR(err); } xdst->num_pols = num_pols; memcpy(xdst->pols, pols, sizeof(struct xfrm_policy *) * num_pols); xdst->policy_genid = atomic_read(&pols[0]->genid); return xdst; }

Contributors

PersonTokensPropCommitsCommitProp
Timo Teräs16260.45%211.76%
Masahide Nakamura4617.16%317.65%
Hideaki Yoshifuji / 吉藤英明186.72%15.88%
James Morris103.73%15.88%
Alexey Kuznetsov103.73%211.76%
Alexey Dobriyan93.36%211.76%
David S. Miller82.99%317.65%
Herbert Xu20.75%15.88%
Kazunori Miyazawa20.75%15.88%
Krishna Kumar10.37%15.88%
Total268100.00%17100.00%


static void xfrm_policy_queue_process(unsigned long arg) { struct sk_buff *skb; struct sock *sk; struct dst_entry *dst; struct xfrm_policy *pol = (struct xfrm_policy *)arg; struct net *net = xp_net(pol); struct xfrm_policy_queue *pq = &pol->polq; struct flowi fl; struct sk_buff_head list; spin_lock(&pq->hold_queue.lock); skb = skb_peek(&pq->hold_queue); if (!skb) { spin_unlock(&pq->hold_queue.lock); goto out; } dst = skb_dst(skb); sk = skb->sk; xfrm_decode_session(skb, &fl, dst->ops->family); spin_unlock(&pq->hold_queue.lock); dst_hold(dst->path); dst = xfrm_lookup(net, dst->path, &fl, sk, 0); if (IS_ERR(dst)) goto purge_queue; if (dst->flags & DST_XFRM_QUEUE) { dst_release(dst); if (pq->timeout >= XFRM_QUEUE_TMO_MAX) goto purge_queue; pq->timeout = pq->timeout << 1; if (!mod_timer(&pq->hold_timer, jiffies + pq->timeout)) xfrm_pol_hold(pol); goto out; } dst_release(dst); __skb_queue_head_init(&list); spin_lock(&pq->hold_queue.lock); pq->timeout = 0; skb_queue_splice_init(&pq->hold_queue, &list); spin_unlock(&pq->hold_queue.lock); while (!skb_queue_empty(&list)) { skb = __skb_dequeue(&list); xfrm_decode_session(skb, &fl, skb_dst(skb)->ops->family); dst_hold(skb_dst(skb)->path); dst = xfrm_lookup(net, skb_dst(skb)->path, &fl, skb->sk, 0); if (IS_ERR(dst)) { kfree_skb(skb); continue; } nf_reset(skb); skb_dst_drop(skb); skb_dst_set(skb, dst); dst_output(net, skb->sk, skb); } out: xfrm_pol_put(pol); return; purge_queue: pq->timeout = 0; skb_queue_purge(&pq->hold_queue); xfrm_pol_put(pol); }

Contributors

PersonTokensPropCommitsCommitProp
Steffen Klassert40193.91%337.50%
Eric W. Biedermann184.22%337.50%
Timo Teräs71.64%112.50%
Li RongQing10.23%112.50%
Total427100.00%8100.00%


static int xdst_queue_output(struct net *net, struct sock *sk, struct sk_buff *skb) { unsigned long sched_next; struct dst_entry *dst = skb_dst(skb); struct xfrm_dst *xdst = (struct xfrm_dst *) dst; struct xfrm_policy *pol = xdst->pols[0]; struct xfrm_policy_queue *pq = &pol->polq; if (unlikely(skb_fclone_busy(sk, skb))) { kfree_skb(skb); return 0; } if (pq->hold_queue.qlen > XFRM_MAX_QUEUE_LEN) { kfree_skb(skb); return -EAGAIN; } skb_dst_force(skb); spin_lock_bh(&pq->hold_queue.lock); if (!pq->timeout) pq->timeout = XFRM_QUEUE_TMO_MIN; sched_next = jiffies + pq->timeout; if (del_timer(&pq->hold_timer)) { if (time_before(pq->hold_timer.expires, sched_next)) sched_next = pq->hold_timer.expires; xfrm_pol_put(pol); } __skb_queue_tail(&pq->hold_queue, skb); if (!mod_timer(&pq->hold_timer, sched_next)) xfrm_pol_hold(pol); spin_unlock_bh(&pq->hold_queue.lock); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Steffen Klassert21293.39%342.86%
Eric Dumazet104.41%342.86%
Eric W. Biedermann52.20%114.29%
Total227100.00%7100.00%


static struct xfrm_dst *xfrm_create_dummy_bundle(struct net *net, struct xfrm_flo *xflo, const struct flowi *fl, int num_xfrms, u16 family) { int err; struct net_device *dev; struct dst_entry *dst; struct dst_entry *dst1; struct xfrm_dst *xdst; xdst = xfrm_alloc_dst(net, family); if (IS_ERR(xdst)) return xdst; if (!(xflo->flags & XFRM_LOOKUP_QUEUE) || net->xfrm.sysctl_larval_drop || num_xfrms <= 0) return xdst; dst = xflo->dst_orig; dst1 = &xdst->u.dst; dst_hold(dst); xdst->route = dst; dst_copy_metrics(dst1, dst); dst1->obsolete = DST_OBSOLETE_FORCE_CHK; dst1->flags |= DST_HOST | DST_XFRM_QUEUE; dst1->lastuse = jiffies; dst1->input = dst_discard; dst1->output = xdst_queue_output; dst_hold(dst); dst1->child = dst; dst1->path = dst; xfrm_init_path((struct xfrm_dst *)dst1, dst, 0); err = -ENODEV; dev = dst->dev; if (!dev) goto free_dst; err = xfrm_fill_dst(xdst, dev, fl); if (err) goto free_dst; out: return xdst; free_dst: dst_release(dst1); xdst = ERR_PTR(err); goto out; }

Contributors

PersonTokensPropCommitsCommitProp
Steffen Klassert19878.88%215.38%
Timo Teräs187.17%17.69%
Masahide Nakamura176.77%215.38%
James Morris62.39%17.69%
Alexey Kuznetsov41.59%215.38%
Hideaki Yoshifuji / 吉藤英明20.80%17.69%
Herbert Xu20.80%17.69%
Alexey Dobriyan20.80%17.69%
Kazunori Miyazawa10.40%17.69%
David S. Miller10.40%17.69%
Total251100.00%13100.00%


static struct flow_cache_object * xfrm_bundle_lookup(struct net *net, const struct flowi *fl, u16 family, u8 dir, struct flow_cache_object *oldflo, void *ctx) { struct xfrm_flo *xflo = (struct xfrm_flo *)ctx; struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX]; struct xfrm_dst *xdst, *new_xdst; int num_pols = 0, num_xfrms = 0, i, err, pol_dead; /* Check if the policies from old bundle are usable */ xdst = NULL; if (oldflo) { xdst = container_of(oldflo, struct xfrm_dst, flo); num_pols = xdst->num_pols; num_xfrms = xdst->num_xfrms; pol_dead = 0; for (i = 0; i < num_pols; i++) { pols[i] = xdst->pols[i]; pol_dead |= pols[i]->walk.dead; } if (pol_dead) { dst_free(&xdst->u.dst); xdst = NULL; num_pols = 0; num_xfrms = 0; oldflo = NULL; } } /* Resolve policies to use if we couldn't get them from * previous cache entry */ if (xdst == NULL) { num_pols = 1; pols[0] = __xfrm_policy_lookup(net, fl, family, flow_to_policy_dir(dir)); err = xfrm_expand_policies(fl, family, pols, &num_pols, &num_xfrms); if (err < 0) goto inc_error; if (num_pols == 0) return NULL; if (num_xfrms <= 0) goto make_dummy_bundle; } new_xdst = xfrm_resolve_and_create_bundle(pols, num_pols, fl, family, xflo->dst_orig); if (IS_ERR(new_xdst)) { err = PTR_ERR(new_xdst); if (err != -EAGAIN) goto error; if (oldflo == NULL) goto make_dummy_bundle; dst_hold(&xdst->u.dst); return oldflo; } else if (new_xdst == NULL) { num_xfrms = 0; if (oldflo == NULL) goto make_dummy_bundle; xdst->num_xfrms = 0; dst_hold(&xdst->u.dst); return oldflo; } /* Kill the previous bundle */ if (xdst) { /* The policies were stolen for newly generated bundle */ xdst->num_pols = 0; dst_free(&xdst->u.dst); } /* Flow cache does not have reference, it dst_free()'s, * but we do need to return one reference for original caller */ dst_hold(&new_xdst->u.dst); return &new_xdst->flo; make_dummy_bundle: /* We found policies, but there's no bundles to instantiate: * either because the policy blocks, has no transformations or * we could not build template (no xfrm_states).*/ xdst = xfrm_create_dummy_bundle(net, xflo, fl, num_xfrms, family); if (IS_ERR(xdst)) { xfrm_pols_put(pols, num_pols); return ERR_CAST(xdst); } xdst->num_pols = num_pols; xdst->num_xfrms = num_xfrms; memcpy(xdst->pols, pols, sizeof(struct xfrm_policy *) * num_pols); dst_hold(&xdst->u.dst); return &xdst->flo; inc_error: XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTPOLERROR); error: if (xdst != NULL) dst_free(&xdst->u.dst); else xfrm_pols_put(pols, num_pols); return ERR_PTR(err); }

Contributors

PersonTokensPropCommitsCommitProp
Timo Teräs39273.13%210.00%
Masahide Nakamura6011.19%315.00%
Hideaki Yoshifuji / 吉藤英明183.36%15.00%
Alexey Kuznetsov173.17%15.00%
Herbert Xu152.80%630.00%
Steffen Klassert122.24%210.00%
Kazunori Miyazawa122.24%15.00%
Alexey Dobriyan40.75%15.00%
Baker Zhang30.56%15.00%
Krishna Kumar20.37%15.00%
David S. Miller10.19%15.00%
Total536100.00%20100.00%


static struct dst_entry *make_blackhole(struct net *net, u16 family, struct dst_entry *dst_orig) { const struct xfrm_policy_afinfo *afinfo = xfrm_policy_get_afinfo(family); struct dst_entry *ret; if (!afinfo) { dst_release(dst_orig); return ERR_PTR(-EINVAL); } else { ret = afinfo->blackhole_route(net, dst_orig); } rcu_read_unlock(); return ret; }

Contributors

PersonTokensPropCommitsCommitProp
David S. Miller7193.42%125.00%
Florian Westphal33.95%250.00%
Li RongQing22.63%125.00%
Total76100.00%4100.00%

/* Main function: finds/creates a bundle for given flow. * * At the moment we eat a raw IP route. Mostly to speed up lookups * on interfaces with disabled IPsec. */
struct dst_entry *xfrm_lookup(struct net *net, struct dst_entry *dst_orig, const struct flowi *fl, const struct sock *sk, int flags) { struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX]; struct flow_cache_object *flo; struct xfrm_dst *xdst; struct dst_entry *dst, *route; u16 family = dst_orig->ops->family; u8 dir = policy_to_flow_dir(XFRM_POLICY_OUT); int i, err, num_pols, num_xfrms = 0, drop_pols = 0; dst = NULL; xdst = NULL; route = NULL; sk = sk_const_to_full_sk(sk); if (sk && sk->sk_policy[XFRM_POLICY_OUT]) { num_pols = 1; pols[0] = xfrm_sk_policy_lookup(sk, XFRM_POLICY_OUT, fl, family); err = xfrm_expand_policies(fl, family, pols, &num_pols, &num_xfrms); if (err < 0) goto dropdst; if (num_pols) { if (num_xfrms <= 0) { drop_pols = num_pols; goto no_transform; } xdst = xfrm_resolve_and_create_bundle( pols, num_pols, fl, family, dst_orig); if (IS_ERR(xdst)) { xfrm_pols_put(pols, num_pols); err = PTR_ERR(xdst); goto dropdst; } else if (xdst == NULL) { num_xfrms = 0; drop_pols = num_pols; goto no_transform; } dst_hold(&xdst->u.dst); xdst->u.dst.flags |= DST_NOCACHE; route = xdst->route; } } if (xdst == NULL) { struct xfrm_flo xflo; xflo.dst_orig = dst_orig; xflo.flags = flags; /* To accelerate a bit... */ if ((dst_orig->flags & DST_NOXFRM) || !net->xfrm.policy_count[XFRM_POLICY_OUT]) goto nopol; flo = flow_cache_lookup(net, fl, family, dir, xfrm_bundle_lookup, &xflo); if (flo == NULL) goto nopol; if (IS_ERR(flo)) { err = PTR_ERR(flo); goto dropdst; } xdst = container_of(flo, struct xfrm_dst, flo); num_pols = xdst->num_pols; num_xfrms = xdst->num_xfrms; memcpy(pols, xdst->pols, sizeof(struct xfrm_policy *) * num_pols); route = xdst->route; } dst = &xdst->u.dst; if (route == NULL && num_xfrms > 0) { /* The only case when xfrm_bundle_lookup() returns a * bundle with null route, is when the template could * not be resolved. It means policies are there, but * bundle could not be created, since we don't yet * have the xfrm_state's. We need to wait for KM to * negotiate new SA's or bail out with error.*/ if (net->xfrm.sysctl_larval_drop) { XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTNOSTATES); err = -EREMOTE; goto error; } err = -EAGAIN; XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTNOSTATES); goto error; } no_transform: if (num_pols == 0) goto nopol; if ((flags & XFRM_LOOKUP_ICMP) && !(pols[0]->flags & XFRM_POLICY_ICMP)) { err = -ENOENT; goto error; } for (i = 0; i < num_pols; i++) pols[i]->curlft.use_time = get_seconds(); if (num_xfrms < 0) { /* Prohibit the flow */ XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTPOLBLOCK); err = -EPERM; goto error; } else if (num_xfrms > 0) { /* Flow transformed */ dst_release(dst_orig); } else { /* Flow passes untransformed */ dst_release(dst); dst = dst_orig; } ok: xfrm_pols_put(pols, drop_pols); if (dst && dst->xfrm && dst->xfrm->props.mode == XFRM_MODE_TUNNEL) dst->flags |= DST_XFRM_TUNNEL; return dst; nopol: if (!(flags & XFRM_LOOKUP_ICMP)) { dst = dst_orig; goto ok; } err = -ENOENT; error: dst_release(dst); dropdst: if (!(flags & XFRM_LOOKUP_KEEP_DST_REF)) dst_release(dst_orig); xfrm_pols_put(pols, drop_pols); return ERR_PTR(err); }

Contributors

PersonTokensPropCommitsCommitProp
Timo Teräs43362.30%310.34%
David S. Miller507.19%413.79%
Alexey Kuznetsov436.19%26.90%
Steffen Klassert426.04%413.79%
Masahide Nakamura284.03%310.34%
Gao Feng243.45%13.45%
Herbert Xu202.88%13.45%
Huaibin Wang152.16%13.45%
Alexey Dobriyan81.15%26.90%
Eric Dumazet81.15%26.90%
Venkat Yekkirala71.01%13.45%
Hideaki Yoshifuji / 吉藤英明50.72%13.45%
Patrick McHardy40.58%13.45%
Adrian Bunk30.43%13.45%
Kazunori Miyazawa30.43%13.45%
Changli Gao20.29%13.45%
Total695100.00%29100.00%

EXPORT_SYMBOL(xfrm_lookup); /* Callers of xfrm_lookup_route() must ensure a call to dst_output(). * Otherwise we may send out blackholed packets. */
struct dst_entry *xfrm_lookup_route(struct net *net, struct dst_entry *dst_orig, const struct flowi *fl, const struct sock *sk, int flags) { struct dst_entry *dst = xfrm_lookup(net, dst_orig, fl, sk, flags | XFRM_LOOKUP_QUEUE | XFRM_LOOKUP_KEEP_DST_REF); if (IS_ERR(dst) && PTR_ERR(dst) == -EREMOTE) return make_blackhole(net, dst_orig->ops->family, dst_orig); return dst; }

Contributors

PersonTokensPropCommitsCommitProp
Steffen Klassert8396.51%250.00%
Huaibin Wang22.33%125.00%
Eric Dumazet11.16%125.00%
Total86100.00%4100.00%

EXPORT_SYMBOL(xfrm_lookup_route);
static inline int xfrm_secpath_reject(int idx, struct sk_buff *skb, const struct flowi *fl) { struct xfrm_state *x; if (!skb->sp || idx < 0 || idx >= skb->sp->len) return 0; x = skb->sp->xvec[idx]; if (!x->type->reject) return 0; return x->type->reject(x, skb, fl); }

Contributors

PersonTokensPropCommitsCommitProp
Timo Teräs6981.18%120.00%
Masahide Nakamura1214.12%120.00%
Alexey Kuznetsov22.35%120.00%
David S. Miller11.18%120.00%
Alexey Dobriyan11.18%120.00%
Total85100.00%5100.00%

/* When skb is transformed back to its "native" form, we have to * check policy restrictions. At the moment we make this in maximally * stupid way. Shame on me. :-) Of course, connected sockets must * have policy cached at them. */
static inline int xfrm_state_ok(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family) { if (xfrm_state_kern(x)) return tmpl->optional && !xfrm_state_addr_cmp(tmpl, x, tmpl->encap_family); return x->id.proto == tmpl->id.proto && (x->id.spi == tmpl->id.spi || !tmpl->id.spi) && (x->props.reqid == tmpl->reqid || !tmpl->reqid) && x->props.mode == tmpl->mode && (tmpl->allalgs || (tmpl->aalgos & (1<<x->props.aalgo)) || !(xfrm_id_proto_match(tmpl->id.proto, IPSEC_PROTO_ANY))) && !(x->props.mode != XFRM_MODE_TRANSPORT && xfrm_state_addr_cmp(tmpl, x, family)); }

Contributors

PersonTokensPropCommitsCommitProp
Timo Teräs14890.24%114.29%
James Morris63.66%114.29%
Masahide Nakamura53.05%228.57%
David S. Miller21.22%114.29%
Alexey Kuznetsov21.22%114.29%
Alexey Dobriyan10.61%114.29%
Total164100.00%7100.00%

/* * 0 or more than 0 is returned when validation is succeeded (either bypass * because of optional transport mode, or next index of the mathced secpath * state with the template. * -1 is returned when no matching template is found. * Otherwise "-2 - errored_index" is returned. */
static inline int xfrm_policy_ok(const struct xfrm_tmpl *tmpl, const struct sec_path *sp, int start, unsigned short family) { int idx = start; if (tmpl->optional) { if (tmpl->mode == XFRM_MODE_TRANSPORT) return start; } else start = -1; for (; idx < sp->len; idx++) { if (xfrm_state_ok(tmpl, sp->xvec[idx], family)) return ++idx; if (sp->xvec[idx]->props.mode != XFRM_MODE_TRANSPORT) { if (start == -1) start = -2-idx; break; } } return start; }

Contributors

PersonTokensPropCommitsCommitProp
Timo Teräs8467.20%112.50%
Masahide Nakamura2620.80%337.50%
Alexey Kuznetsov129.60%225.00%
David S. Miller21.60%112.50%
Alexey Dobriyan10.80%112.50%
Total125100.00%8100.00%


int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, unsigned int family, int reverse) { const struct xfrm_policy_afinfo *afinfo = xfrm_policy_get_afinfo(family); int err; if (unlikely(afinfo == NULL)) return -EAFNOSUPPORT; afinfo->decode_session(skb, fl, reverse); err = security_xfrm_decode_session(skb, &fl->flowi_secid); rcu_read_unlock(); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Timo Teräs4861.54%19.09%
Masahide Nakamura1316.67%218.18%
Alexey Kuznetsov67.69%19.09%
Herbert Xu56.41%218.18%
Florian Westphal33.85%218.18%
Hideaki Yoshifuji / 吉藤英明11.28%19.09%
David S. Miller11.28%19.09%
Alexey Dobriyan11.28%19.09%
Total78100.00%11100.00%

EXPORT_SYMBOL(__xfrm_decode_session);
static inline int secpath_has_nontransport(const struct sec_path *sp, int k, int *idxp) { for (; k < sp->len; k++) { if (sp->xvec[k]->props.mode != XFRM_MODE_TRANSPORT) { *idxp = k; return 1; } } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Timo Teräs5487.10%125.00%
Alexey Kuznetsov69.68%125.00%
Kazunori Miyazawa11.61%125.00%
David S. Miller11.61%125.00%
Total62100.00%4100.00%


int __xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) { struct net *net = dev_net(skb->dev); struct xfrm_policy *pol; struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX]; int npols = 0; int xfrm_nr; int pi; int reverse; struct flowi fl; u8 fl_dir; int xerr_idx = -1; reverse = dir & ~XFRM_POLICY_MASK; dir &= XFRM_POLICY_MASK; fl_dir = policy_to_flow_dir(dir); if (__xfrm_decode_session(skb, &fl, family, reverse) < 0) { XFRM_INC_STATS(net, LINUX_MIB_XFRMINHDRERROR); return 0; } nf_nat_decode_session(skb, &fl, family); /* First, check used SA against their selectors. */ if (skb->sp) { int i; for (i = skb->sp->len-1; i >= 0; i--) { struct xfrm_state *x = skb->sp->xvec[i]; if (!xfrm_selector_match(&x->sel, &fl, family)) { XFRM_INC_STATS(net, LINUX_MIB_XFRMINSTATEMISMATCH); return 0; } } } pol = NULL; sk = sk_to_full_sk(sk); if (sk && sk->sk_policy[dir]) { pol = xfrm_sk_policy_lookup(sk, dir, &fl, family); if (IS_ERR(pol)) { XFRM_INC_STATS(net, LINUX_MIB_XFRMINPOLERROR); return 0; } } if (!pol) { struct flow_cache_object *flo; flo = flow_cache_lookup(net, &fl, family, fl_dir, xfrm_policy_lookup, NULL); if (IS_ERR_OR_NULL(flo)) pol = ERR_CAST(flo); else pol = container_of(flo, struct xfrm_policy, flo); } if (IS_ERR(pol)) { XFRM_INC_STATS(net, LINUX_MIB_XFRMINPOLERROR); return 0; } if (!pol) { if (skb->sp && secpath_has_nontransport(skb->sp, 0, &xerr_idx)) { xfrm_secpath_reject(xerr_idx, skb, &fl); XFRM_INC_STATS(net, LINUX_MIB_XFRMINNOPOLS); return 0; } return 1; } pol->curlft.use_time = get_seconds(); pols[0] = pol; npols++; #ifdef CONFIG_XFRM_SUB_POLICY if (pols[0]->type != XFRM_POLICY_TYPE_MAIN) { pols[1] = xfrm_policy_lookup_bytype(net, XFRM_POLICY_TYPE_MAIN, &fl, family, XFRM_POLICY_IN); if (pols[1]) { if (IS_ERR(pols[1])) { XFRM_INC_STATS(net, LINUX_MIB_XFRMINPOLERROR); return 0; } pols[1]->curlft.use_time = get_seconds(); npols++; } } #endif if (pol->action == XFRM_POLICY_ALLOW) { struct sec_path *sp; static struct sec_path dummy; struct xfrm_tmpl *tp[XFRM_MAX_DEPTH]; struct xfrm_tmpl *stp[XFRM_MAX_DEPTH]; struct xfrm_tmpl **tpp = tp; int ti = 0; int i, k; if ((sp = skb->sp) == NULL) sp = &dummy; for (pi = 0; pi < npols; pi++) { if (pols[pi] != pol && pols[pi]->action != XFRM_POLICY_ALLOW) { XFRM_INC_STATS(net, LINUX_MIB_XFRMINPOLBLOCK); goto reject; } if (ti + pols[pi]->xfrm_nr >= XFRM_MAX_DEPTH) { XFRM_INC_STATS(net, LINUX_MIB_XFRMINBUFFERERROR); goto reject_error; } for (i = 0; i < pols[pi]->xfrm_nr; i++) tpp[ti++] = &pols[pi]->xfrm_vec[i]; } xfrm_nr = ti; if (npols > 1) { xfrm_tmpl_sort(stp, tpp, xfrm_nr, family, net); tpp = stp; } /* For each tunnel xfrm, find the first matching tmpl. * For each tmpl before that, find corresponding xfrm. * Order is _important_. Later we will implement * some barriers, but at the moment barriers * are implied between each two transformations. */ for (i = xfrm_nr-1, k = 0; i >= 0; i--) { k = xfrm_policy_ok(tpp[i], sp, k, family); if (k < 0) { if (k < -1) /* "-2 - errored_index" returned */ xerr_idx = -(2+k); XFRM_INC_STATS(net, LINUX_MIB_XFRMINTMPLMISMATCH); goto reject; } } if (secpath_has_nontransport(sp, k, &xerr_idx)) { XFRM_INC_STATS(net, LINUX_MIB_XFRMINTMPLMISMATCH); goto reject; } xfrm_pols_put(pols, npols); return 1; } XFRM_INC_STATS(net, LINUX_MIB_XFRMINPOLBLOCK); reject: xfrm_secpath_reject(xerr_idx, skb, &fl); reject_error: xfrm_pols_put(pols, npols); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Timo Teräs67380.79%14.55%
Hideaki Yoshifuji / 吉藤英明546.48%29.09%
Eric Dumazet222.64%29.09%
Herbert Xu202.40%418.18%
David S. Miller161.92%29.09%
Alexey Dobriyan141.68%313.64%
Alexey Kuznetsov111.32%14.55%
Kazunori Miyazawa101.20%14.55%
Masahide Nakamura70.84%29.09%
Steffen Klassert20.24%14.55%
Fan Du20.24%14.55%
Venkat Yekkirala10.12%14.55%
Adrian Bunk10.12%14.55%
Total833100.00%22100.00%

EXPORT_SYMBOL(__xfrm_policy_check);
int __xfrm_route_forward(struct sk_buff *skb, unsigned short family) { struct net *net = dev_net(skb->dev); struct flowi fl; struct dst_entry *dst; int res = 1; if (xfrm_decode_session(skb, &fl, family) < 0) { XFRM_INC_STATS(net, LINUX_MIB_XFRMFWDHDRERROR); return 0; } skb_dst_force(skb); dst = xfrm_lookup(net, skb_dst(skb), &fl, NULL, XFRM_LOOKUP_QUEUE); if (IS_ERR(dst)) { res = 0; dst = NULL; } skb_dst_set(skb, dst); return res; }

Contributors

PersonTokensPropCommitsCommitProp
Timo Teräs5950.43%114.29%
David S. Miller4941.88%228.57%
Eric Dumazet75.98%228.57%
Steffen Klassert10.85%114.29%
Alexey Dobriyan10.85%114.29%
Total117100.00%7100.00%

EXPORT_SYMBOL(__xfrm_route_forward); /* Optimize later using cookies and generation ids. */
static struct dst_entry *xfrm_dst_check(struct dst_entry *dst, u32 cookie) { /* Code (such as __xfrm4_bundle_create()) sets dst->obsolete * to DST_OBSOLETE_FORCE_CHK to force all XFRM destinations to * get validated by dst_ops->check on every use. We do this * because when a normal route referenced by an XFRM dst is * obsoleted we do not go looking around for all parent * referencing XFRM dsts so that we can invalidate them. It * is just too much work. Instead we make the checks here on * every use. For example: * * XFRM dst A --> IPv4 dst X * * X is the "xdst->route" of A (X is also the "dst->path" of A * in this example). If X is marked obsolete, "A" will not * notice. That's what we are validating here via the * stale_bundle() check. * * When a policy's bundle is pruned, we dst_free() the XFRM * dst which causes it's ->obsolete field to be set to * DST_OBSOLETE_DEAD. If an XFRM dst has been pruned like * this, we want to force a new route lookup. */ if (dst->obsolete < 0 && !stale_bundle(dst)) return dst; return NULL; }

Contributors

PersonTokensPropCommitsCommitProp
Timo Teräs3491.89%125.00%
David S. Miller25.41%250.00%
Alexey Dobriyan12.70%125.00%
Total37100.00%4100.00%


static int stale_bundle(struct dst_entry *dst) { return !xfrm_bundle_ok((struct xfrm_dst *)dst); }

Contributors

PersonTokensPropCommitsCommitProp
Timo Teräs1982.61%133.33%
David S. Miller313.04%133.33%
Hideaki Yoshifuji / 吉藤英明14.35%133.33%
Total23100.00%3100.00%


void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev) { while ((dst = dst->child) && dst->xfrm && dst->dev == dev) { dst->dev = dev_net(dev)->loopback_dev; dev_hold(dst->dev); dev_put(dev); } }

Contributors

PersonTokensPropCommitsCommitProp
Timo Teräs4778.33%133.33%
Hideaki Yoshifuji / 吉藤英明1016.67%133.33%
David S. Miller35.00%133.33%
Total60100.00%3100.00%

EXPORT_SYMBOL(xfrm_dst_ifdown);
static void xfrm_link_failure(struct sk_buff *skb) { /* Impossible. Such dst must be popped before reaches point of failure. */ }

Contributors

PersonTokensPropCommitsCommitProp
Timo Teräs1191.67%150.00%
Hideaki Yoshifuji / 吉藤英明18.33%150.00%
Total12100.00%2100.00%


static struct dst_entry *xfrm_negative_advice(struct dst_entry *dst) { if (dst) { if (dst->obsolete) { dst_release(dst); dst = NULL; } } return dst; }

Contributors

PersonTokensPropCommitsCommitProp
Timo Teräs2666.67%150.00%
Herbert Xu1333.33%150.00%
Total39100.00%2100.00%


void xfrm_garbage_collect(struct net *net) { flow_cache_flush(net); }

Contributors

PersonTokensPropCommitsCommitProp
Steffen Klassert1280.00%150.00%
Fan Du320.00%150.00%
Total15100.00%2100.00%

EXPORT_SYMBOL(xfrm_garbage_collect);
void xfrm_garbage_collect_deferred(struct net *net) { flow_cache_flush_deferred(net); }

Contributors

PersonTokensPropCommitsCommitProp
Steffen Klassert1280.00%150.00%
Fan Du320.00%150.00%
Total15100.00%2100.00%

EXPORT_SYMBOL(xfrm_garbage_collect_deferred);
static void xfrm_init_pmtu(struct dst_entry *dst) { do { struct xfrm_dst *xdst = (struct xfrm_dst *)dst; u32 pmtu, route_mtu_cached; pmtu = dst_mtu(dst->child); xdst->child_mtu_cached = pmtu; pmtu = xfrm_state_mtu(dst->xfrm, pmtu); route_mtu_cached = dst_mtu(xdst->route); xdst->route_mtu_cached = route_mtu_cached; if (pmtu > route_mtu_cached) pmtu = route_mtu_cached; dst_metric_set(dst, RTAX_MTU, pmtu); } while ((dst = dst->next)); }

Contributors

PersonTokensPropCommitsCommitProp
Herbert Xu9795.10%375.00%
David S. Miller54.90%125.00%
Total102100.00%4100.00%

/* Check that the bundle accepts the flow and its components are * still valid. */
static int xfrm_bundle_ok(struct xfrm_dst *first) { struct dst_entry *dst = &first->u.dst; struct xfrm_dst *last; u32 mtu; if (!dst_check(dst->path, ((struct xfrm_dst *)dst)->path_cookie) || (dst->dev && !netif_running(dst->dev))) return 0; if (dst->flags & DST_XFRM_QUEUE) return 1; last = NULL; do { struct xfrm_dst *xdst = (struct xfrm_dst *)dst; if (dst->xfrm->km.state != XFRM_STATE_VALID) return 0; if (xdst->xfrm_genid != dst->xfrm->genid) return 0; if (xdst->num_pols > 0 && xdst->policy_genid != atomic_read(&xdst->pols[0]->genid)) return 0; mtu = dst_mtu(dst->child); if (xdst->child_mtu_cached != mtu) { last = xdst; xdst->child_mtu_cached = mtu; } if (!dst_check(xdst->route, xdst->route_cookie)) return 0; mtu = dst_mtu(xdst->route); if (xdst->route_mtu_cached != mtu) { last = xdst; xdst->route_mtu_cached = mtu; } dst = dst->child; } while (dst->xfrm); if (likely(!last)) return 1; mtu = last->child_mtu_cached; for (;;) { dst = &last->u.dst; mtu = xfrm_state_mtu(dst->xfrm, mtu); if (mtu > last->route_mtu_cached) mtu = last->route_mtu_cached; dst_metric_set(dst, RTAX_MTU, mtu); if (last == first) break; last = (struct xfrm_dst *)last->u.dst.next; last->child_mtu_cached = mtu; } return 1; }

Contributors

PersonTokensPropCommitsCommitProp
Herbert Xu26376.68%430.77%
Timo Teräs277.87%215.38%
David S. Miller195.54%215.38%
Hideaki Yoshifuji / 吉藤英明133.79%17.69%
Steffen Klassert113.21%17.69%
Patrick McHardy72.04%17.69%
Masahide Nakamura20.58%17.69%
Stephen Hemminger10.29%17.69%
Total343100.00%13100.00%


static unsigned int xfrm_default_advmss(const struct dst_entry *dst) { return dst_metric_advmss(dst->path); }

Contributors

PersonTokensPropCommitsCommitProp
David S. Miller21100.00%1100.00%
Total21100.00%1100.00%


static unsigned int xfrm_mtu(const struct dst_entry *dst) { unsigned int mtu = dst_metric_raw(dst, RTAX_MTU); return mtu ? : dst_mtu(dst->path); }

Contributors

PersonTokensPropCommitsCommitProp
David S. Miller2057.14%133.33%
Steffen Klassert1542.86%266.67%
Total35100.00%3100.00%


static const void *xfrm_get_dst_nexthop(const struct dst_entry *dst, const void *daddr) { const struct dst_entry *path = dst->path; for (; dst != path; dst = dst->child) { const struct xfrm_state *xfrm = dst->xfrm; if (xfrm->props.mode == XFRM_MODE_TRANSPORT) continue; if (xfrm->type->flags & XFRM_TYPE_REMOTE_COADDR) daddr = xfrm->coaddr; else if (!(xfrm->type->flags & XFRM_TYPE_LOCAL_COADDR)) daddr = &xfrm->id.daddr; } return daddr; }

Contributors

PersonTokensPropCommitsCommitProp
Julian Anastasov10396.26%266.67%
David S. Miller43.74%133.33%
Total107100.00%3100.00%


static struct neighbour *xfrm_neigh_lookup(const struct dst_entry *dst, struct sk_buff *skb, const void *daddr) { const struct dst_entry *path = dst->path; if (!skb) daddr = xfrm_get_dst_nexthop(dst, daddr); return path->ops->neigh_lookup(path, skb, daddr); }

Contributors

PersonTokensPropCommitsCommitProp
Julian Anastasov62100.00%1100.00%
Total62100.00%1100.00%


static void xfrm_confirm_neigh(const struct dst_entry *dst, const void *daddr) { const struct dst_entry *path = dst->path; daddr = xfrm_get_dst_nexthop(dst, daddr); path->ops->confirm_neigh(path, daddr); }

Contributors

PersonTokensPropCommitsCommitProp
Julian Anastasov47100.00%2100.00%
Total47100.00%2100.00%


int xfrm_policy_register_afinfo(const struct xfrm_policy_afinfo *afinfo, int family) { int err = 0; if (WARN_ON(family >= ARRAY_SIZE(xfrm_policy_afinfo))) return -EAFNOSUPPORT; spin_lock(&xfrm_policy_afinfo_lock); if (unlikely(xfrm_policy_afinfo[family] != NULL)) err = -EEXIST; else { struct dst_ops *dst_ops = afinfo->dst_ops; if (likely(dst_ops->kmem_cachep == NULL)) dst_ops->kmem_cachep = xfrm_dst_cache; if (likely(dst_ops->check == NULL)) dst_ops->check = xfrm_dst_check; if (likely(dst_ops->default_advmss == NULL)) dst_ops->default_advmss = xfrm_default_advmss; if (likely(dst_ops->mtu == NULL)) dst_ops->mtu = xfrm_mtu; if (likely(dst_ops->negative_advice == NULL)) dst_ops->negative_advice = xfrm_negative_advice; if (likely(dst_ops->link_failure == NULL)) dst_ops->link_failure = xfrm_link_failure; if (likely(dst_ops->neigh_lookup == NULL)) dst_ops->neigh_lookup = xfrm_neigh_lookup; if (likely(!dst_ops->confirm_neigh)) dst_ops->confirm_neigh = xfrm_confirm_neigh; rcu_assign_pointer(xfrm_policy_afinfo[family], afinfo); } spin_unlock(&xfrm_policy_afinfo_lock); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Joy Latten10647.32%214.29%
David S. Miller5323.66%428.57%
Hideaki Yoshifuji / 吉藤英明2712.05%17.14%
Julian Anastasov125.36%17.14%
Florian Westphal94.02%17.14%
Kazunori Miyazawa73.12%17.14%
Priyanka Jain41.79%17.14%
Steffen Klassert31.34%17.14%
Eric Dumazet20.89%17.14%
Li RongQing10.45%17.14%
Total224100.00%14100.00%

EXPORT_SYMBOL(xfrm_policy_register_afinfo);
void xfrm_policy_unregister_afinfo(const struct xfrm_policy_afinfo *afinfo) { struct dst_ops *dst_ops = afinfo->dst_ops; int i; for (i = 0; i < ARRAY_SIZE(xfrm_policy_afinfo); i++) { if (xfrm_policy_afinfo[i] != afinfo) continue; RCU_INIT_POINTER(xfrm_policy_afinfo[i], NULL); break; } synchronize_rcu(); dst_ops->kmem_cachep = NULL; dst_ops->check = NULL; dst_ops->negative_advice = NULL; dst_ops->link_failure = NULL; }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明3842.70%116.67%
Florian Westphal2831.46%233.33%
Alexey Kuznetsov1617.98%116.67%
Eric Dumazet44.49%116.67%
Priyanka Jain33.37%116.67%
Total89100.00%6100.00%

EXPORT_SYMBOL(xfrm_policy_unregister_afinfo);
static int xfrm_dev_event(struct notifier_block *this, unsigned long event, void *ptr) { struct net_device *dev = netdev_notifier_info_to_dev(ptr); switch (event) { case NETDEV_DOWN: xfrm_garbage_collect(dev_net(dev)); } return NOTIFY_DONE; }

Contributors

PersonTokensPropCommitsCommitProp
Joy Latten3265.31%120.00%
Eric W. Biedermann714.29%120.00%
Alexey Dobriyan612.24%120.00%
Jiri Pirko36.12%120.00%
Steffen Klassert12.04%120.00%
Total49100.00%5100.00%

static struct notifier_block xfrm_dev_notifier = { .notifier_call = xfrm_dev_event, }; #ifdef CONFIG_XFRM_STATISTICS
static int __net_init xfrm_statistics_init(struct net *net) { int rv; net->mib.xfrm_statistics = alloc_percpu(struct linux_xfrm_mib); if (!net->mib.xfrm_statistics) return -ENOMEM; rv = xfrm_proc_init(net); if (rv < 0) free_percpu(net->mib.xfrm_statistics); return rv; }

Contributors

PersonTokensPropCommitsCommitProp
Alexey Dobriyan3452.31%240.00%
Masahide Nakamura1523.08%120.00%
Américo Wang1218.46%120.00%
Eric Dumazet46.15%120.00%
Total65100.00%5100.00%


static void xfrm_statistics_fini(struct net *net) { xfrm_proc_fini(net); free_percpu(net->mib.xfrm_statistics); }

Contributors

PersonTokensPropCommitsCommitProp
Alexey Dobriyan2496.00%266.67%
Américo Wang14.00%133.33%
Total25100.00%3100.00%

#else
static int __net_init xfrm_statistics_init(struct net *net) { return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Alexey Dobriyan15100.00%1100.00%
Total15100.00%1100.00%


static void xfrm_statistics_fini(struct net *net) { }

Contributors

PersonTokensPropCommitsCommitProp
Alexey Dobriyan10100.00%1100.00%
Total10100.00%1100.00%

#endif
static int __net_init xfrm_policy_init(struct net *net) { unsigned int hmask, sz; int dir; if (net_eq(net, &init_net)) xfrm_dst_cache = kmem_cache_create("xfrm_dst_cache", sizeof(struct xfrm_dst), 0, SLAB_HWCACHE_ALIGN|SLAB_PANIC, NULL); hmask = 8 - 1; sz = (hmask+1) * sizeof(struct hlist_head); net->xfrm.policy_byidx = xfrm_hash_alloc(sz); if (!net->xfrm.policy_byidx) goto out_byidx; net->xfrm.policy_idx_hmask = hmask; for (dir = 0; dir < XFRM_POLICY_MAX; dir++) { struct xfrm_policy_hash *htab; net->xfrm.policy_count[dir] = 0; net->xfrm.policy_count[XFRM_POLICY_MAX + dir] = 0; INIT_HLIST_HEAD(&net->xfrm.policy_inexact[dir]); htab = &net->xfrm.policy_bydst[dir]; htab->table = xfrm_hash_alloc(sz); if (!htab->table) goto out_bydst; htab->hmask = hmask; htab->dbits4 = 32; htab->sbits4 = 32; htab->dbits6 = 128; htab->sbits6 = 128; } net->xfrm.policy_hthresh.lbits4 = 32; net->xfrm.policy_hthresh.rbits4 = 32; net->xfrm.policy_hthresh.lbits6 = 128; net->xfrm.policy_hthresh.rbits6 = 128; seqlock_init(&net->xfrm.policy_hthresh.lock); INIT_LIST_HEAD(&net->xfrm.policy_all); INIT_WORK(&net->xfrm.policy_hash_work, xfrm_hash_resize); INIT_WORK(&net->xfrm.policy_hthresh.work, xfrm_hash_rebuild); if (net_eq(net, &init_net)) register_netdevice_notifier(&xfrm_dev_notifier); return 0; out_bydst: for (dir--; dir >= 0; dir--) { struct xfrm_policy_hash *htab; htab = &net->xfrm.policy_bydst[dir]; xfrm_hash_free(htab->table, sz); } xfrm_hash_free(net->xfrm.policy_byidx, sz); out_byidx: return -ENOMEM; }

Contributors

PersonTokensPropCommitsCommitProp
Alexey Dobriyan15439.79%853.33%
Joy Latten11228.94%16.67%
Christophe Gouault9023.26%213.33%
Herbert Xu256.46%213.33%
Timo Teräs51.29%16.67%
Hideaki Yoshifuji / 吉藤英明10.26%16.67%
Total387100.00%15100.00%


static void xfrm_policy_fini(struct net *net) { unsigned int sz; int dir; flush_work(&net->xfrm.policy_hash_work); #ifdef CONFIG_XFRM_SUB_POLICY xfrm_policy_flush(net, XFRM_POLICY_TYPE_SUB, false); #endif xfrm_policy_flush(net, XFRM_POLICY_TYPE_MAIN, false); WARN_ON(!list_empty(&net->xfrm.policy_all)); for (dir = 0; dir < XFRM_POLICY_MAX; dir++) { struct xfrm_policy_hash *htab; WARN_ON(!hlist_empty(&net->xfrm.policy_inexact[dir])); htab = &net->xfrm.policy_bydst[dir]; sz = (htab->hmask + 1) * sizeof(struct hlist_head); WARN_ON(!hlist_empty(htab->table)); xfrm_hash_free(htab->table, sz); } sz = (net->xfrm.policy_idx_hmask + 1) * sizeof(struct hlist_head); WARN_ON(!hlist_empty(net->xfrm.policy_byidx)); xfrm_hash_free(net->xfrm.policy_byidx, sz); }

Contributors

PersonTokensPropCommitsCommitProp
Alexey Dobriyan18495.83%777.78%
Michal Kubeček63.12%111.11%
Tetsuo Handa21.04%111.11%
Total192100.00%9100.00%


static int __net_init xfrm_net_init(struct net *net) { int rv; /* Initialize the per-net locks here */ spin_lock_init(&net->xfrm.xfrm_state_lock); spin_lock_init(&net->xfrm.xfrm_policy_lock); mutex_init(&net->xfrm.xfrm_cfg_mutex); rv = xfrm_statistics_init(net); if (rv < 0) goto out_statistics; rv = xfrm_state_init(net); if (rv < 0) goto out_state; rv = xfrm_policy_init(net); if (rv < 0) goto out_policy; rv = xfrm_sysctl_init(net); if (rv < 0) goto out_sysctl; rv = flow_cache_init(net); if (rv < 0) goto out; return 0; out: xfrm_sysctl_fini(net); out_sysctl: xfrm_policy_fini(net); out_policy: xfrm_state_fini(net); out_state: xfrm_statistics_fini(net); out_statistics: return rv; }

Contributors

PersonTokensPropCommitsCommitProp
Alexey Dobriyan10564.81%350.00%
Florian Westphal3119.14%116.67%
Steffen Klassert2213.58%116.67%
Fan Du42.47%116.67%
Total162100.00%6100.00%


static void __net_exit xfrm_net_exit(struct net *net) { flow_cache_fini(net); xfrm_sysctl_fini(net); xfrm_policy_fini(net); xfrm_state_fini(net); xfrm_statistics_fini(net); }

Contributors

PersonTokensPropCommitsCommitProp
Alexey Dobriyan3286.49%375.00%
Steffen Klassert513.51%125.00%
Total37100.00%4100.00%

static struct pernet_operations __net_initdata xfrm_net_ops = { .init = xfrm_net_init, .exit = xfrm_net_exit, };
void __init xfrm_init(void) { flow_cache_hp_init(); register_pernet_subsys(&xfrm_net_ops); seqcount_init(&xfrm_policy_hash_generation); xfrm_input_init(); }

Contributors

PersonTokensPropCommitsCommitProp
Florian Westphal623.08%116.67%
Alexey Dobriyan623.08%116.67%
Joy Latten519.23%116.67%
Herbert Xu415.38%116.67%
Sebastian Andrzej Siewior311.54%116.67%
Hideaki Yoshifuji / 吉藤英明27.69%116.67%
Total26100.00%6100.00%

#ifdef CONFIG_AUDITSYSCALL
static void xfrm_audit_common_policyinfo(struct xfrm_policy *xp, struct audit_buffer *audit_buf) { struct xfrm_sec_ctx *ctx = xp->security; struct xfrm_selector *sel = &xp->selector; if (ctx) audit_log_format(audit_buf, " sec_alg=%u sec_doi=%u sec_obj=%s", ctx->ctx_alg, ctx->ctx_doi, ctx->ctx_str); switch (sel->family) { case AF_INET: audit_log_format(audit_buf, " src=%pI4", &sel->saddr.a4); if (sel->prefixlen_s != 32) audit_log_format(audit_buf, " src_prefixlen=%d", sel->prefixlen_s); audit_log_format(audit_buf, " dst=%pI4", &sel->daddr.a4); if (sel->prefixlen_d != 32) audit_log_format(audit_buf, " dst_prefixlen=%d", sel->prefixlen_d); break; case AF_INET6: audit_log_format(audit_buf, " src=%pI6", sel->saddr.a6); if (sel->prefixlen_s != 128) audit_log_format(audit_buf, " src_prefixlen=%d", sel->prefixlen_s); audit_log_format(audit_buf, " dst=%pI6", sel->daddr.a6); if (sel->prefixlen_d != 128) audit_log_format(audit_buf, " dst_prefixlen=%d", sel->prefixlen_d); break; } }

Contributors

PersonTokensPropCommitsCommitProp
Paul Moore11254.90%120.00%
Joy Latten6933.82%120.00%
Herbert Xu178.33%120.00%
Harvey Harrison62.94%240.00%
Total204100.00%5100.00%


void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, bool task_valid) { struct audit_buffer *audit_buf; audit_buf = xfrm_audit_start("SPD-add"); if (audit_buf == NULL) return; xfrm_audit_helper_usrinfo(task_valid, audit_buf); audit_log_format(audit_buf, " res=%u", result); xfrm_audit_common_policyinfo(xp, audit_buf); audit_log_end(audit_buf); }

Contributors

PersonTokensPropCommitsCommitProp
Joy Latten3453.97%116.67%
Alexey Kuznetsov1015.87%116.67%
Paul Moore914.29%233.33%
David S. Miller711.11%116.67%
Tetsuo Handa34.76%116.67%
Total63100.00%6100.00%

EXPORT_SYMBOL_GPL(xfrm_audit_policy_add);
void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, bool task_valid) { struct audit_buffer *audit_buf; audit_buf = xfrm_audit_start("SPD-delete"); if (audit_buf == NULL) return; xfrm_audit_helper_usrinfo(task_valid, audit_buf); audit_log_format(audit_buf, " res=%u", result); xfrm_audit_common_policyinfo(xp, audit_buf); audit_log_end(audit_buf); }

Contributors

PersonTokensPropCommitsCommitProp
Joy Latten2946.03%112.50%
David S. Miller1422.22%112.50%
Paul Moore914.29%225.00%
Herbert Xu711.11%225.00%
Tetsuo Handa34.76%112.50%
Hideaki Yoshifuji / 吉藤英明11.59%112.50%
Total63100.00%8100.00%

EXPORT_SYMBOL_GPL(xfrm_audit_policy_delete); #endif #ifdef CONFIG_XFRM_MIGRATE
static bool xfrm_migrate_selector_match(const struct xfrm_selector *sel_cmp, const struct xfrm_selector *sel_tgt) { if (sel_cmp->proto == IPSEC_ULPROTO_ANY) { if (sel_tgt->family == sel_cmp->family && xfrm_addr_equal(&sel_tgt->daddr, &sel_cmp->daddr, sel_cmp->family) && xfrm_addr_equal(&sel_tgt->saddr, &sel_cmp->saddr, sel_cmp->family) && sel_tgt->prefixlen_d == sel_cmp->prefixlen_d && sel_tgt->prefixlen_s == sel_cmp->prefixlen_s) { return true; } } else { if (memcmp(sel_tgt, sel_cmp, sizeof(*sel_tgt)) == 0) { return true; } } return false; }

Contributors

PersonTokensPropCommitsCommitProp
Shinta Sugimoto11393.39%125.00%
David S. Miller64.96%250.00%
Hideaki Yoshifuji / 吉藤英明21.65%125.00%
Total121100.00%4100.00%


static struct xfrm_policy *xfrm_migrate_policy_find(const struct xfrm_selector *sel, u8 dir, u8 type, struct net *net) { struct xfrm_policy *pol, *ret = NULL; struct hlist_head *chain; u32 priority = ~0U; spin_lock_bh(&net->xfrm.xfrm_policy_lock); chain = policy_hash_direct(net, &sel->daddr, &sel->saddr, sel->family, dir); hlist_for_each_entry(pol, chain, bydst) { if (xfrm_migrate_selector_match(sel, &pol->selector) && pol->type == type) { ret = pol; priority = ret->priority; break; } } chain = &net->xfrm.policy_inexact[dir]; hlist_for_each_entry(pol, chain, bydst) { if ((pol->priority >= priority) && ret) break; if (xfrm_migrate_selector_match(sel, &pol->selector) && pol->type == type) { ret = pol; break; } } xfrm_pol_hold(ret); spin_unlock_bh(&net->xfrm.xfrm_policy_lock); return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Shinta Sugimoto16181.31%112.50%
Fan Du168.08%225.00%
Li RongQing136.57%112.50%
Alexey Dobriyan52.53%225.00%
Florian Westphal21.01%112.50%
David S. Miller10.51%112.50%
Total198100.00%8100.00%


static int migrate_tmpl_match(const struct xfrm_migrate *m, const struct xfrm_tmpl *t) { int match = 0; if (t->mode == m->mode && t->id.proto == m->proto && (m->reqid == 0 || t->reqid == m->reqid)) { switch (t->mode) { case XFRM_MODE_TUNNEL: case XFRM_MODE_BEET: if (xfrm_addr_equal(&t->id.daddr, &m->old_daddr, m->old_family) && xfrm_addr_equal(&t->saddr, &m->old_saddr, m->old_family)) { match = 1; } break; case XFRM_MODE_TRANSPORT: /* in case of transport mode, template does not store any IP addresses, hence we just compare mode and protocol */ match = 1; break; default: break; } } return match; }

Contributors

PersonTokensPropCommitsCommitProp
Shinta Sugimoto13097.01%133.33%
David S. Miller21.49%133.33%
Hideaki Yoshifuji / 吉藤英明21.49%133.33%
Total134100.00%3100.00%

/* update endpoint address(es) of template(s) */
static int xfrm_policy_migrate(struct xfrm_policy *pol, struct xfrm_migrate *m, int num_migrate) { struct xfrm_migrate *mp; int i, j, n = 0; write_lock_bh(&pol->lock); if (unlikely(pol->walk.dead)) { /* target policy has been deleted */ write_unlock_bh(&pol->lock); return -ENOENT; } for (i = 0; i < pol->xfrm_nr; i++) { for (j = 0, mp = m; j < num_migrate; j++, mp++) { if (!migrate_tmpl_match(mp, &pol->xfrm_vec[i])) continue; n++; if (pol->xfrm_vec[i].mode != XFRM_MODE_TUNNEL && pol->xfrm_vec[i].mode != XFRM_MODE_BEET) continue; /* update endpoints */ memcpy(&pol->xfrm_vec[i].id.daddr, &mp->new_daddr, sizeof(pol->xfrm_vec[i].id.daddr)); memcpy(&pol->xfrm_vec[i].saddr, &mp->new_saddr, sizeof(pol->xfrm_vec[i].saddr)); pol->xfrm_vec[i].encap_family = mp->new_family; /* flush bundles */ atomic_inc(&pol->genid); } } write_unlock_bh(&pol->lock); if (!n) return -ENODATA; return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Shinta Sugimoto24193.41%125.00%
Herbert Xu135.04%250.00%
Timo Teräs41.55%125.00%
Total258100.00%4100.00%


static int xfrm_migrate_check(const struct xfrm_migrate *m, int num_migrate) { int i, j; if (num_migrate < 1 || num_migrate > XFRM_MAX_DEPTH) return -EINVAL; for (i = 0; i < num_migrate; i++) { if (xfrm_addr_equal(&m[i].old_daddr, &m[i].new_daddr, m[i].old_family) && xfrm_addr_equal(&m[i].old_saddr, &m[i].new_saddr, m[i].old_family)) return -EINVAL; if (xfrm_addr_any(&m[i].new_daddr, m[i].new_family) || xfrm_addr_any(&m[i].new_saddr, m[i].new_family)) return -EINVAL; /* check if there is any duplicated entry */ for (j = i + 1; j < num_migrate; j++) { if (!memcmp(&m[i].old_daddr, &m[j].old_daddr, sizeof(m[i].old_daddr)) && !memcmp(&m[i].old_saddr, &m[j].old_saddr, sizeof(m[i].old_saddr)) && m[i].proto == m[j].proto && m[i].mode == m[j].mode && m[i].reqid == m[j].reqid && m[i].old_family == m[j].old_family) return -EINVAL; } } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Shinta Sugimoto28998.97%133.33%
Hideaki Yoshifuji / 吉藤英明20.68%133.33%
David S. Miller10.34%133.33%
Total292100.00%3100.00%


int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, struct xfrm_migrate *m, int num_migrate, struct xfrm_kmaddress *k, struct net *net) { int i, err, nx_cur = 0, nx_new = 0; struct xfrm_policy *pol = NULL; struct xfrm_state *x, *xc; struct xfrm_state *x_cur[XFRM_MAX_DEPTH]; struct xfrm_state *x_new[XFRM_MAX_DEPTH]; struct xfrm_migrate *mp; if ((err = xfrm_migrate_check(m, num_migrate)) < 0) goto out; /* Stage 1 - find policy */ if ((pol = xfrm_migrate_policy_find(sel, dir, type, net)) == NULL) { err = -ENOENT; goto out; } /* Stage 2 - find and update state(s) */ for (i = 0, mp = m; i < num_migrate; i++, mp++) { if ((x = xfrm_migrate_state_find(mp, net))) { x_cur[nx_cur] = x; nx_cur++; if ((xc = xfrm_state_migrate(x, mp))) { x_new[nx_new] = xc; nx_new++; } else { err = -ENODATA; goto restore_state; } } } /* Stage 3 - update policy */ if ((err = xfrm_policy_migrate(pol, m, num_migrate)) < 0) goto restore_state; /* Stage 4 - delete old state(s) */ if (nx_cur) { xfrm_states_put(x_cur, nx_cur); xfrm_states_delete(x_cur, nx_cur); } /* Stage 5 - announce */ km_migrate(sel, dir, type, m, num_migrate, k); xfrm_pol_put(pol); return 0; out: return err; restore_state: if (pol) xfrm_pol_put(pol); if (nx_cur) xfrm_states_put(x_cur, nx_cur); if (nx_new) xfrm_states_delete(x_new, nx_new); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Shinta Sugimoto30694.74%120.00%
Fan Du92.79%240.00%
Arnaud Ebalard72.17%120.00%
David S. Miller10.31%120.00%
Total323100.00%5100.00%

EXPORT_SYMBOL(xfrm_migrate); #endif

Overall Contributors

PersonTokensPropCommitsCommitProp
Timo Teräs307017.20%72.34%
Herbert Xu213311.95%4113.71%
David S. Miller201811.30%5117.06%
Steffen Klassert14498.12%165.35%
Alexey Kuznetsov12537.02%82.68%
Shinta Sugimoto12466.98%10.33%
Alexey Dobriyan11206.27%289.36%
Masahide Nakamura8004.48%113.68%
Christophe Gouault7554.23%20.67%
Joy Latten6183.46%31.00%
Hideaki Yoshifuji / 吉藤英明6073.40%72.34%
Florian Westphal3752.10%155.02%
Eric Dumazet2671.50%144.68%
Jamal Hadi Salim2431.36%82.68%
Fan Du2401.34%62.01%
Andrew Morton2261.27%20.67%
Julian Anastasov2241.25%20.67%
Paul Moore1560.87%51.67%
Trent Jaeger1360.76%10.33%
James Morris1170.66%31.00%
Patrick McHardy1100.62%41.34%
Kazunori Miyazawa930.52%10.33%
Eric Paris670.38%20.67%
Baker Zhang570.32%10.33%
Adrian Bunk510.29%20.67%
Li RongQing440.25%62.01%
Wei Yongjun340.19%20.67%
Venkat Yekkirala340.19%31.00%
Eric W. Biedermann300.17%51.67%
Gao Feng240.13%10.33%
David Ahern230.13%10.33%
Tetsuo Handa190.11%10.33%
Huaibin Wang170.10%10.33%
Tobias Brunner150.08%10.33%
Américo Wang150.08%20.67%
Fernando Luis Vázquez Cao130.07%10.33%
Sasha Levin120.07%10.33%
Stephen Hemminger110.06%10.33%
Priyanka Jain100.06%10.33%
Madalin Bucur100.06%10.33%
Xin Long90.05%10.33%
Hiroaki SHIMODA90.05%10.33%
Arnaldo Carvalho de Melo90.05%10.33%
Arnaud Ebalard70.04%10.33%
Harvey Harrison60.03%20.67%
Joakim Koskela60.03%10.33%
Michal Kubeček60.03%10.33%
Thomas Egerer60.03%10.33%
Ken Helias50.03%10.33%
Pavel Emelyanov50.03%10.33%
Ying Xue50.03%10.33%
Nicolas Dichtel40.02%10.33%
Krishna Kumar30.02%20.67%
David Howells30.02%10.33%
Thomas Gleixner30.02%10.33%
Jiri Pirko30.02%10.33%
Sebastian Andrzej Siewior30.02%10.33%
Kris Katterjohn30.02%10.33%
Christoph Lameter20.01%10.33%
Christoph Hellwig20.01%10.33%
Linus Torvalds20.01%10.33%
Weilong Chen20.01%10.33%
Changli Gao20.01%10.33%
Eugene Surovegin20.01%10.33%
Jesper Juhl20.01%10.33%
Al Viro10.01%10.33%
Panagiotis Issaris10.01%10.33%
Alexander Alemayhu10.01%10.33%
Daniel Borkmann0.00%00.00%
Total17854100.00%299100.00%
Directory: net/xfrm
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.