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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /net/xfrm/xfrm_state.c
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'net/xfrm/xfrm_state.c')
-rw-r--r--net/xfrm/xfrm_state.c2933
1 files changed, 2933 insertions, 0 deletions
diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c
new file mode 100644
index 000000000..2f4cf976b
--- /dev/null
+++ b/net/xfrm/xfrm_state.c
@@ -0,0 +1,2933 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * xfrm_state.c
+ *
+ * Changes:
+ * Mitsuru KANDA @USAGI
+ * Kazunori MIYAZAWA @USAGI
+ * Kunihiro Ishiguro <kunihiro@ipinfusion.com>
+ * IPv6 support
+ * YOSHIFUJI Hideaki @USAGI
+ * Split up af-specific functions
+ * Derek Atkins <derek@ihtfp.com>
+ * Add UDP Encapsulation
+ *
+ */
+
+#include <linux/compat.h>
+#include <linux/workqueue.h>
+#include <net/xfrm.h>
+#include <linux/pfkeyv2.h>
+#include <linux/ipsec.h>
+#include <linux/module.h>
+#include <linux/cache.h>
+#include <linux/audit.h>
+#include <linux/uaccess.h>
+#include <linux/ktime.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+
+#include <crypto/aead.h>
+
+#include "xfrm_hash.h"
+
+#define xfrm_state_deref_prot(table, net) \
+ rcu_dereference_protected((table), lockdep_is_held(&(net)->xfrm.xfrm_state_lock))
+
+static void xfrm_state_gc_task(struct work_struct *work);
+
+/* Each xfrm_state may be linked to two tables:
+
+ 1. Hash table by (spi,daddr,ah/esp) to find SA by SPI. (input,ctl)
+ 2. Hash table by (daddr,family,reqid) to find what SAs exist for given
+ destination/tunnel endpoint. (output)
+ */
+
+static unsigned int xfrm_state_hashmax __read_mostly = 1 * 1024 * 1024;
+static struct kmem_cache *xfrm_state_cache __ro_after_init;
+
+static DECLARE_WORK(xfrm_state_gc_work, xfrm_state_gc_task);
+static HLIST_HEAD(xfrm_state_gc_list);
+
+static inline bool xfrm_state_hold_rcu(struct xfrm_state __rcu *x)
+{
+ return refcount_inc_not_zero(&x->refcnt);
+}
+
+static inline unsigned int xfrm_dst_hash(struct net *net,
+ const xfrm_address_t *daddr,
+ const xfrm_address_t *saddr,
+ u32 reqid,
+ unsigned short family)
+{
+ return __xfrm_dst_hash(daddr, saddr, reqid, family, net->xfrm.state_hmask);
+}
+
+static inline unsigned int xfrm_src_hash(struct net *net,
+ const xfrm_address_t *daddr,
+ const xfrm_address_t *saddr,
+ unsigned short family)
+{
+ return __xfrm_src_hash(daddr, saddr, family, net->xfrm.state_hmask);
+}
+
+static inline unsigned int
+xfrm_spi_hash(struct net *net, const xfrm_address_t *daddr,
+ __be32 spi, u8 proto, unsigned short family)
+{
+ return __xfrm_spi_hash(daddr, spi, proto, family, net->xfrm.state_hmask);
+}
+
+static unsigned int xfrm_seq_hash(struct net *net, u32 seq)
+{
+ return __xfrm_seq_hash(seq, net->xfrm.state_hmask);
+}
+
+static void xfrm_hash_transfer(struct hlist_head *list,
+ struct hlist_head *ndsttable,
+ struct hlist_head *nsrctable,
+ struct hlist_head *nspitable,
+ struct hlist_head *nseqtable,
+ unsigned int nhashmask)
+{
+ struct hlist_node *tmp;
+ struct xfrm_state *x;
+
+ hlist_for_each_entry_safe(x, tmp, list, bydst) {
+ unsigned int h;
+
+ h = __xfrm_dst_hash(&x->id.daddr, &x->props.saddr,
+ x->props.reqid, x->props.family,
+ nhashmask);
+ hlist_add_head_rcu(&x->bydst, ndsttable + h);
+
+ h = __xfrm_src_hash(&x->id.daddr, &x->props.saddr,
+ x->props.family,
+ nhashmask);
+ hlist_add_head_rcu(&x->bysrc, nsrctable + h);
+
+ if (x->id.spi) {
+ h = __xfrm_spi_hash(&x->id.daddr, x->id.spi,
+ x->id.proto, x->props.family,
+ nhashmask);
+ hlist_add_head_rcu(&x->byspi, nspitable + h);
+ }
+
+ if (x->km.seq) {
+ h = __xfrm_seq_hash(x->km.seq, nhashmask);
+ hlist_add_head_rcu(&x->byseq, nseqtable + h);
+ }
+ }
+}
+
+static unsigned long xfrm_hash_new_size(unsigned int state_hmask)
+{
+ return ((state_hmask + 1) << 1) * sizeof(struct hlist_head);
+}
+
+static void xfrm_hash_resize(struct work_struct *work)
+{
+ struct net *net = container_of(work, struct net, xfrm.state_hash_work);
+ struct hlist_head *ndst, *nsrc, *nspi, *nseq, *odst, *osrc, *ospi, *oseq;
+ unsigned long nsize, osize;
+ unsigned int nhashmask, ohashmask;
+ int i;
+
+ nsize = xfrm_hash_new_size(net->xfrm.state_hmask);
+ ndst = xfrm_hash_alloc(nsize);
+ if (!ndst)
+ return;
+ nsrc = xfrm_hash_alloc(nsize);
+ if (!nsrc) {
+ xfrm_hash_free(ndst, nsize);
+ return;
+ }
+ nspi = xfrm_hash_alloc(nsize);
+ if (!nspi) {
+ xfrm_hash_free(ndst, nsize);
+ xfrm_hash_free(nsrc, nsize);
+ return;
+ }
+ nseq = xfrm_hash_alloc(nsize);
+ if (!nseq) {
+ xfrm_hash_free(ndst, nsize);
+ xfrm_hash_free(nsrc, nsize);
+ xfrm_hash_free(nspi, nsize);
+ return;
+ }
+
+ spin_lock_bh(&net->xfrm.xfrm_state_lock);
+ write_seqcount_begin(&net->xfrm.xfrm_state_hash_generation);
+
+ nhashmask = (nsize / sizeof(struct hlist_head)) - 1U;
+ odst = xfrm_state_deref_prot(net->xfrm.state_bydst, net);
+ for (i = net->xfrm.state_hmask; i >= 0; i--)
+ xfrm_hash_transfer(odst + i, ndst, nsrc, nspi, nseq, nhashmask);
+
+ osrc = xfrm_state_deref_prot(net->xfrm.state_bysrc, net);
+ ospi = xfrm_state_deref_prot(net->xfrm.state_byspi, net);
+ oseq = xfrm_state_deref_prot(net->xfrm.state_byseq, net);
+ ohashmask = net->xfrm.state_hmask;
+
+ rcu_assign_pointer(net->xfrm.state_bydst, ndst);
+ rcu_assign_pointer(net->xfrm.state_bysrc, nsrc);
+ rcu_assign_pointer(net->xfrm.state_byspi, nspi);
+ rcu_assign_pointer(net->xfrm.state_byseq, nseq);
+ net->xfrm.state_hmask = nhashmask;
+
+ write_seqcount_end(&net->xfrm.xfrm_state_hash_generation);
+ spin_unlock_bh(&net->xfrm.xfrm_state_lock);
+
+ osize = (ohashmask + 1) * sizeof(struct hlist_head);
+
+ synchronize_rcu();
+
+ xfrm_hash_free(odst, osize);
+ xfrm_hash_free(osrc, osize);
+ xfrm_hash_free(ospi, osize);
+ xfrm_hash_free(oseq, osize);
+}
+
+static DEFINE_SPINLOCK(xfrm_state_afinfo_lock);
+static struct xfrm_state_afinfo __rcu *xfrm_state_afinfo[NPROTO];
+
+static DEFINE_SPINLOCK(xfrm_state_gc_lock);
+
+int __xfrm_state_delete(struct xfrm_state *x);
+
+int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol);
+static bool km_is_alive(const struct km_event *c);
+void km_state_expired(struct xfrm_state *x, int hard, u32 portid);
+
+int xfrm_register_type(const struct xfrm_type *type, unsigned short family)
+{
+ struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
+ int err = 0;
+
+ if (!afinfo)
+ return -EAFNOSUPPORT;
+
+#define X(afi, T, name) do { \
+ WARN_ON((afi)->type_ ## name); \
+ (afi)->type_ ## name = (T); \
+ } while (0)
+
+ switch (type->proto) {
+ case IPPROTO_COMP:
+ X(afinfo, type, comp);
+ break;
+ case IPPROTO_AH:
+ X(afinfo, type, ah);
+ break;
+ case IPPROTO_ESP:
+ X(afinfo, type, esp);
+ break;
+ case IPPROTO_IPIP:
+ X(afinfo, type, ipip);
+ break;
+ case IPPROTO_DSTOPTS:
+ X(afinfo, type, dstopts);
+ break;
+ case IPPROTO_ROUTING:
+ X(afinfo, type, routing);
+ break;
+ case IPPROTO_IPV6:
+ X(afinfo, type, ipip6);
+ break;
+ default:
+ WARN_ON(1);
+ err = -EPROTONOSUPPORT;
+ break;
+ }
+#undef X
+ rcu_read_unlock();
+ return err;
+}
+EXPORT_SYMBOL(xfrm_register_type);
+
+void xfrm_unregister_type(const struct xfrm_type *type, unsigned short family)
+{
+ struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
+
+ if (unlikely(afinfo == NULL))
+ return;
+
+#define X(afi, T, name) do { \
+ WARN_ON((afi)->type_ ## name != (T)); \
+ (afi)->type_ ## name = NULL; \
+ } while (0)
+
+ switch (type->proto) {
+ case IPPROTO_COMP:
+ X(afinfo, type, comp);
+ break;
+ case IPPROTO_AH:
+ X(afinfo, type, ah);
+ break;
+ case IPPROTO_ESP:
+ X(afinfo, type, esp);
+ break;
+ case IPPROTO_IPIP:
+ X(afinfo, type, ipip);
+ break;
+ case IPPROTO_DSTOPTS:
+ X(afinfo, type, dstopts);
+ break;
+ case IPPROTO_ROUTING:
+ X(afinfo, type, routing);
+ break;
+ case IPPROTO_IPV6:
+ X(afinfo, type, ipip6);
+ break;
+ default:
+ WARN_ON(1);
+ break;
+ }
+#undef X
+ rcu_read_unlock();
+}
+EXPORT_SYMBOL(xfrm_unregister_type);
+
+static const struct xfrm_type *xfrm_get_type(u8 proto, unsigned short family)
+{
+ const struct xfrm_type *type = NULL;
+ struct xfrm_state_afinfo *afinfo;
+ int modload_attempted = 0;
+
+retry:
+ afinfo = xfrm_state_get_afinfo(family);
+ if (unlikely(afinfo == NULL))
+ return NULL;
+
+ switch (proto) {
+ case IPPROTO_COMP:
+ type = afinfo->type_comp;
+ break;
+ case IPPROTO_AH:
+ type = afinfo->type_ah;
+ break;
+ case IPPROTO_ESP:
+ type = afinfo->type_esp;
+ break;
+ case IPPROTO_IPIP:
+ type = afinfo->type_ipip;
+ break;
+ case IPPROTO_DSTOPTS:
+ type = afinfo->type_dstopts;
+ break;
+ case IPPROTO_ROUTING:
+ type = afinfo->type_routing;
+ break;
+ case IPPROTO_IPV6:
+ type = afinfo->type_ipip6;
+ break;
+ default:
+ break;
+ }
+
+ if (unlikely(type && !try_module_get(type->owner)))
+ type = NULL;
+
+ rcu_read_unlock();
+
+ if (!type && !modload_attempted) {
+ request_module("xfrm-type-%d-%d", family, proto);
+ modload_attempted = 1;
+ goto retry;
+ }
+
+ return type;
+}
+
+static void xfrm_put_type(const struct xfrm_type *type)
+{
+ module_put(type->owner);
+}
+
+int xfrm_register_type_offload(const struct xfrm_type_offload *type,
+ unsigned short family)
+{
+ struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
+ int err = 0;
+
+ if (unlikely(afinfo == NULL))
+ return -EAFNOSUPPORT;
+
+ switch (type->proto) {
+ case IPPROTO_ESP:
+ WARN_ON(afinfo->type_offload_esp);
+ afinfo->type_offload_esp = type;
+ break;
+ default:
+ WARN_ON(1);
+ err = -EPROTONOSUPPORT;
+ break;
+ }
+
+ rcu_read_unlock();
+ return err;
+}
+EXPORT_SYMBOL(xfrm_register_type_offload);
+
+void xfrm_unregister_type_offload(const struct xfrm_type_offload *type,
+ unsigned short family)
+{
+ struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
+
+ if (unlikely(afinfo == NULL))
+ return;
+
+ switch (type->proto) {
+ case IPPROTO_ESP:
+ WARN_ON(afinfo->type_offload_esp != type);
+ afinfo->type_offload_esp = NULL;
+ break;
+ default:
+ WARN_ON(1);
+ break;
+ }
+ rcu_read_unlock();
+}
+EXPORT_SYMBOL(xfrm_unregister_type_offload);
+
+static const struct xfrm_type_offload *
+xfrm_get_type_offload(u8 proto, unsigned short family, bool try_load)
+{
+ const struct xfrm_type_offload *type = NULL;
+ struct xfrm_state_afinfo *afinfo;
+
+retry:
+ afinfo = xfrm_state_get_afinfo(family);
+ if (unlikely(afinfo == NULL))
+ return NULL;
+
+ switch (proto) {
+ case IPPROTO_ESP:
+ type = afinfo->type_offload_esp;
+ break;
+ default:
+ break;
+ }
+
+ if ((type && !try_module_get(type->owner)))
+ type = NULL;
+
+ rcu_read_unlock();
+
+ if (!type && try_load) {
+ request_module("xfrm-offload-%d-%d", family, proto);
+ try_load = false;
+ goto retry;
+ }
+
+ return type;
+}
+
+static void xfrm_put_type_offload(const struct xfrm_type_offload *type)
+{
+ module_put(type->owner);
+}
+
+static const struct xfrm_mode xfrm4_mode_map[XFRM_MODE_MAX] = {
+ [XFRM_MODE_BEET] = {
+ .encap = XFRM_MODE_BEET,
+ .flags = XFRM_MODE_FLAG_TUNNEL,
+ .family = AF_INET,
+ },
+ [XFRM_MODE_TRANSPORT] = {
+ .encap = XFRM_MODE_TRANSPORT,
+ .family = AF_INET,
+ },
+ [XFRM_MODE_TUNNEL] = {
+ .encap = XFRM_MODE_TUNNEL,
+ .flags = XFRM_MODE_FLAG_TUNNEL,
+ .family = AF_INET,
+ },
+};
+
+static const struct xfrm_mode xfrm6_mode_map[XFRM_MODE_MAX] = {
+ [XFRM_MODE_BEET] = {
+ .encap = XFRM_MODE_BEET,
+ .flags = XFRM_MODE_FLAG_TUNNEL,
+ .family = AF_INET6,
+ },
+ [XFRM_MODE_ROUTEOPTIMIZATION] = {
+ .encap = XFRM_MODE_ROUTEOPTIMIZATION,
+ .family = AF_INET6,
+ },
+ [XFRM_MODE_TRANSPORT] = {
+ .encap = XFRM_MODE_TRANSPORT,
+ .family = AF_INET6,
+ },
+ [XFRM_MODE_TUNNEL] = {
+ .encap = XFRM_MODE_TUNNEL,
+ .flags = XFRM_MODE_FLAG_TUNNEL,
+ .family = AF_INET6,
+ },
+};
+
+static const struct xfrm_mode *xfrm_get_mode(unsigned int encap, int family)
+{
+ const struct xfrm_mode *mode;
+
+ if (unlikely(encap >= XFRM_MODE_MAX))
+ return NULL;
+
+ switch (family) {
+ case AF_INET:
+ mode = &xfrm4_mode_map[encap];
+ if (mode->family == family)
+ return mode;
+ break;
+ case AF_INET6:
+ mode = &xfrm6_mode_map[encap];
+ if (mode->family == family)
+ return mode;
+ break;
+ default:
+ break;
+ }
+
+ return NULL;
+}
+
+void xfrm_state_free(struct xfrm_state *x)
+{
+ kmem_cache_free(xfrm_state_cache, x);
+}
+EXPORT_SYMBOL(xfrm_state_free);
+
+static void ___xfrm_state_destroy(struct xfrm_state *x)
+{
+ hrtimer_cancel(&x->mtimer);
+ del_timer_sync(&x->rtimer);
+ kfree(x->aead);
+ kfree(x->aalg);
+ kfree(x->ealg);
+ kfree(x->calg);
+ kfree(x->encap);
+ kfree(x->coaddr);
+ kfree(x->replay_esn);
+ kfree(x->preplay_esn);
+ if (x->type_offload)
+ xfrm_put_type_offload(x->type_offload);
+ if (x->type) {
+ x->type->destructor(x);
+ xfrm_put_type(x->type);
+ }
+ if (x->xfrag.page)
+ put_page(x->xfrag.page);
+ xfrm_dev_state_free(x);
+ security_xfrm_state_free(x);
+ xfrm_state_free(x);
+}
+
+static void xfrm_state_gc_task(struct work_struct *work)
+{
+ struct xfrm_state *x;
+ struct hlist_node *tmp;
+ struct hlist_head gc_list;
+
+ spin_lock_bh(&xfrm_state_gc_lock);
+ hlist_move_list(&xfrm_state_gc_list, &gc_list);
+ spin_unlock_bh(&xfrm_state_gc_lock);
+
+ synchronize_rcu();
+
+ hlist_for_each_entry_safe(x, tmp, &gc_list, gclist)
+ ___xfrm_state_destroy(x);
+}
+
+static enum hrtimer_restart xfrm_timer_handler(struct hrtimer *me)
+{
+ struct xfrm_state *x = container_of(me, struct xfrm_state, mtimer);
+ enum hrtimer_restart ret = HRTIMER_NORESTART;
+ time64_t now = ktime_get_real_seconds();
+ time64_t next = TIME64_MAX;
+ int warn = 0;
+ int err = 0;
+
+ spin_lock(&x->lock);
+ if (x->km.state == XFRM_STATE_DEAD)
+ goto out;
+ if (x->km.state == XFRM_STATE_EXPIRED)
+ goto expired;
+ if (x->lft.hard_add_expires_seconds) {
+ long tmo = x->lft.hard_add_expires_seconds +
+ x->curlft.add_time - now;
+ if (tmo <= 0) {
+ if (x->xflags & XFRM_SOFT_EXPIRE) {
+ /* enter hard expire without soft expire first?!
+ * setting a new date could trigger this.
+ * workaround: fix x->curflt.add_time by below:
+ */
+ x->curlft.add_time = now - x->saved_tmo - 1;
+ tmo = x->lft.hard_add_expires_seconds - x->saved_tmo;
+ } else
+ goto expired;
+ }
+ if (tmo < next)
+ next = tmo;
+ }
+ if (x->lft.hard_use_expires_seconds) {
+ long tmo = x->lft.hard_use_expires_seconds +
+ (READ_ONCE(x->curlft.use_time) ? : now) - now;
+ if (tmo <= 0)
+ goto expired;
+ if (tmo < next)
+ next = tmo;
+ }
+ if (x->km.dying)
+ goto resched;
+ if (x->lft.soft_add_expires_seconds) {
+ long tmo = x->lft.soft_add_expires_seconds +
+ x->curlft.add_time - now;
+ if (tmo <= 0) {
+ warn = 1;
+ x->xflags &= ~XFRM_SOFT_EXPIRE;
+ } else if (tmo < next) {
+ next = tmo;
+ x->xflags |= XFRM_SOFT_EXPIRE;
+ x->saved_tmo = tmo;
+ }
+ }
+ if (x->lft.soft_use_expires_seconds) {
+ long tmo = x->lft.soft_use_expires_seconds +
+ (READ_ONCE(x->curlft.use_time) ? : now) - now;
+ if (tmo <= 0)
+ warn = 1;
+ else if (tmo < next)
+ next = tmo;
+ }
+
+ x->km.dying = warn;
+ if (warn)
+ km_state_expired(x, 0, 0);
+resched:
+ if (next != TIME64_MAX) {
+ hrtimer_forward_now(&x->mtimer, ktime_set(next, 0));
+ ret = HRTIMER_RESTART;
+ }
+
+ goto out;
+
+expired:
+ if (x->km.state == XFRM_STATE_ACQ && x->id.spi == 0)
+ x->km.state = XFRM_STATE_EXPIRED;
+
+ err = __xfrm_state_delete(x);
+ if (!err)
+ km_state_expired(x, 1, 0);
+
+ xfrm_audit_state_delete(x, err ? 0 : 1, true);
+
+out:
+ spin_unlock(&x->lock);
+ return ret;
+}
+
+static void xfrm_replay_timer_handler(struct timer_list *t);
+
+struct xfrm_state *xfrm_state_alloc(struct net *net)
+{
+ struct xfrm_state *x;
+
+ x = kmem_cache_zalloc(xfrm_state_cache, GFP_ATOMIC);
+
+ if (x) {
+ write_pnet(&x->xs_net, net);
+ refcount_set(&x->refcnt, 1);
+ atomic_set(&x->tunnel_users, 0);
+ INIT_LIST_HEAD(&x->km.all);
+ INIT_HLIST_NODE(&x->bydst);
+ INIT_HLIST_NODE(&x->bysrc);
+ INIT_HLIST_NODE(&x->byspi);
+ INIT_HLIST_NODE(&x->byseq);
+ hrtimer_init(&x->mtimer, CLOCK_BOOTTIME, HRTIMER_MODE_ABS_SOFT);
+ x->mtimer.function = xfrm_timer_handler;
+ timer_setup(&x->rtimer, xfrm_replay_timer_handler, 0);
+ x->curlft.add_time = ktime_get_real_seconds();
+ x->lft.soft_byte_limit = XFRM_INF;
+ x->lft.soft_packet_limit = XFRM_INF;
+ x->lft.hard_byte_limit = XFRM_INF;
+ x->lft.hard_packet_limit = XFRM_INF;
+ x->replay_maxage = 0;
+ x->replay_maxdiff = 0;
+ spin_lock_init(&x->lock);
+ }
+ return x;
+}
+EXPORT_SYMBOL(xfrm_state_alloc);
+
+void __xfrm_state_destroy(struct xfrm_state *x, bool sync)
+{
+ WARN_ON(x->km.state != XFRM_STATE_DEAD);
+
+ if (sync) {
+ synchronize_rcu();
+ ___xfrm_state_destroy(x);
+ } else {
+ spin_lock_bh(&xfrm_state_gc_lock);
+ hlist_add_head(&x->gclist, &xfrm_state_gc_list);
+ spin_unlock_bh(&xfrm_state_gc_lock);
+ schedule_work(&xfrm_state_gc_work);
+ }
+}
+EXPORT_SYMBOL(__xfrm_state_destroy);
+
+int __xfrm_state_delete(struct xfrm_state *x)
+{
+ struct net *net = xs_net(x);
+ int err = -ESRCH;
+
+ if (x->km.state != XFRM_STATE_DEAD) {
+ x->km.state = XFRM_STATE_DEAD;
+ spin_lock(&net->xfrm.xfrm_state_lock);
+ list_del(&x->km.all);
+ hlist_del_rcu(&x->bydst);
+ hlist_del_rcu(&x->bysrc);
+ if (x->km.seq)
+ hlist_del_rcu(&x->byseq);
+ if (x->id.spi)
+ hlist_del_rcu(&x->byspi);
+ net->xfrm.state_num--;
+ spin_unlock(&net->xfrm.xfrm_state_lock);
+
+ if (x->encap_sk)
+ sock_put(rcu_dereference_raw(x->encap_sk));
+
+ xfrm_dev_state_delete(x);
+
+ /* All xfrm_state objects are created by xfrm_state_alloc.
+ * The xfrm_state_alloc call gives a reference, and that
+ * is what we are dropping here.
+ */
+ xfrm_state_put(x);
+ err = 0;
+ }
+
+ return err;
+}
+EXPORT_SYMBOL(__xfrm_state_delete);
+
+int xfrm_state_delete(struct xfrm_state *x)
+{
+ int err;
+
+ spin_lock_bh(&x->lock);
+ err = __xfrm_state_delete(x);
+ spin_unlock_bh(&x->lock);
+
+ return err;
+}
+EXPORT_SYMBOL(xfrm_state_delete);
+
+#ifdef CONFIG_SECURITY_NETWORK_XFRM
+static inline int
+xfrm_state_flush_secctx_check(struct net *net, u8 proto, bool task_valid)
+{
+ int i, err = 0;
+
+ for (i = 0; i <= net->xfrm.state_hmask; i++) {
+ struct xfrm_state *x;
+
+ hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) {
+ if (xfrm_id_proto_match(x->id.proto, proto) &&
+ (err = security_xfrm_state_delete(x)) != 0) {
+ xfrm_audit_state_delete(x, 0, task_valid);
+ return err;
+ }
+ }
+ }
+
+ return err;
+}
+
+static inline int
+xfrm_dev_state_flush_secctx_check(struct net *net, struct net_device *dev, bool task_valid)
+{
+ int i, err = 0;
+
+ for (i = 0; i <= net->xfrm.state_hmask; i++) {
+ struct xfrm_state *x;
+ struct xfrm_dev_offload *xso;
+
+ hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) {
+ xso = &x->xso;
+
+ if (xso->dev == dev &&
+ (err = security_xfrm_state_delete(x)) != 0) {
+ xfrm_audit_state_delete(x, 0, task_valid);
+ return err;
+ }
+ }
+ }
+
+ return err;
+}
+#else
+static inline int
+xfrm_state_flush_secctx_check(struct net *net, u8 proto, bool task_valid)
+{
+ return 0;
+}
+
+static inline int
+xfrm_dev_state_flush_secctx_check(struct net *net, struct net_device *dev, bool task_valid)
+{
+ return 0;
+}
+#endif
+
+int xfrm_state_flush(struct net *net, u8 proto, bool task_valid, bool sync)
+{
+ int i, err = 0, cnt = 0;
+
+ spin_lock_bh(&net->xfrm.xfrm_state_lock);
+ err = xfrm_state_flush_secctx_check(net, proto, task_valid);
+ if (err)
+ goto out;
+
+ err = -ESRCH;
+ for (i = 0; i <= net->xfrm.state_hmask; i++) {
+ struct xfrm_state *x;
+restart:
+ hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) {
+ if (!xfrm_state_kern(x) &&
+ xfrm_id_proto_match(x->id.proto, proto)) {
+ xfrm_state_hold(x);
+ spin_unlock_bh(&net->xfrm.xfrm_state_lock);
+
+ err = xfrm_state_delete(x);
+ xfrm_audit_state_delete(x, err ? 0 : 1,
+ task_valid);
+ if (sync)
+ xfrm_state_put_sync(x);
+ else
+ xfrm_state_put(x);
+ if (!err)
+ cnt++;
+
+ spin_lock_bh(&net->xfrm.xfrm_state_lock);
+ goto restart;
+ }
+ }
+ }
+out:
+ spin_unlock_bh(&net->xfrm.xfrm_state_lock);
+ if (cnt)
+ err = 0;
+
+ return err;
+}
+EXPORT_SYMBOL(xfrm_state_flush);
+
+int xfrm_dev_state_flush(struct net *net, struct net_device *dev, bool task_valid)
+{
+ int i, err = 0, cnt = 0;
+
+ spin_lock_bh(&net->xfrm.xfrm_state_lock);
+ err = xfrm_dev_state_flush_secctx_check(net, dev, task_valid);
+ if (err)
+ goto out;
+
+ err = -ESRCH;
+ for (i = 0; i <= net->xfrm.state_hmask; i++) {
+ struct xfrm_state *x;
+ struct xfrm_dev_offload *xso;
+restart:
+ hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) {
+ xso = &x->xso;
+
+ if (!xfrm_state_kern(x) && xso->dev == dev) {
+ xfrm_state_hold(x);
+ spin_unlock_bh(&net->xfrm.xfrm_state_lock);
+
+ err = xfrm_state_delete(x);
+ xfrm_audit_state_delete(x, err ? 0 : 1,
+ task_valid);
+ xfrm_state_put(x);
+ if (!err)
+ cnt++;
+
+ spin_lock_bh(&net->xfrm.xfrm_state_lock);
+ goto restart;
+ }
+ }
+ }
+ if (cnt)
+ err = 0;
+
+out:
+ spin_unlock_bh(&net->xfrm.xfrm_state_lock);
+ return err;
+}
+EXPORT_SYMBOL(xfrm_dev_state_flush);
+
+void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si)
+{
+ spin_lock_bh(&net->xfrm.xfrm_state_lock);
+ si->sadcnt = net->xfrm.state_num;
+ si->sadhcnt = net->xfrm.state_hmask + 1;
+ si->sadhmcnt = xfrm_state_hashmax;
+ spin_unlock_bh(&net->xfrm.xfrm_state_lock);
+}
+EXPORT_SYMBOL(xfrm_sad_getinfo);
+
+static void
+__xfrm4_init_tempsel(struct xfrm_selector *sel, const struct flowi *fl)
+{
+ const struct flowi4 *fl4 = &fl->u.ip4;
+
+ sel->daddr.a4 = fl4->daddr;
+ sel->saddr.a4 = fl4->saddr;
+ sel->dport = xfrm_flowi_dport(fl, &fl4->uli);
+ sel->dport_mask = htons(0xffff);
+ sel->sport = xfrm_flowi_sport(fl, &fl4->uli);
+ sel->sport_mask = htons(0xffff);
+ sel->family = AF_INET;
+ sel->prefixlen_d = 32;
+ sel->prefixlen_s = 32;
+ sel->proto = fl4->flowi4_proto;
+ sel->ifindex = fl4->flowi4_oif;
+}
+
+static void
+__xfrm6_init_tempsel(struct xfrm_selector *sel, const struct flowi *fl)
+{
+ const struct flowi6 *fl6 = &fl->u.ip6;
+
+ /* Initialize temporary selector matching only to current session. */
+ *(struct in6_addr *)&sel->daddr = fl6->daddr;
+ *(struct in6_addr *)&sel->saddr = fl6->saddr;
+ sel->dport = xfrm_flowi_dport(fl, &fl6->uli);
+ sel->dport_mask = htons(0xffff);
+ sel->sport = xfrm_flowi_sport(fl, &fl6->uli);
+ sel->sport_mask = htons(0xffff);
+ sel->family = AF_INET6;
+ sel->prefixlen_d = 128;
+ sel->prefixlen_s = 128;
+ sel->proto = fl6->flowi6_proto;
+ sel->ifindex = fl6->flowi6_oif;
+}
+
+static void
+xfrm_init_tempstate(struct xfrm_state *x, const struct flowi *fl,
+ const struct xfrm_tmpl *tmpl,
+ const xfrm_address_t *daddr, const xfrm_address_t *saddr,
+ unsigned short family)
+{
+ switch (family) {
+ case AF_INET:
+ __xfrm4_init_tempsel(&x->sel, fl);
+ break;
+ case AF_INET6:
+ __xfrm6_init_tempsel(&x->sel, fl);
+ break;
+ }
+
+ x->id = tmpl->id;
+
+ switch (tmpl->encap_family) {
+ case AF_INET:
+ if (x->id.daddr.a4 == 0)
+ x->id.daddr.a4 = daddr->a4;
+ x->props.saddr = tmpl->saddr;
+ if (x->props.saddr.a4 == 0)
+ x->props.saddr.a4 = saddr->a4;
+ break;
+ case AF_INET6:
+ if (ipv6_addr_any((struct in6_addr *)&x->id.daddr))
+ memcpy(&x->id.daddr, daddr, sizeof(x->sel.daddr));
+ memcpy(&x->props.saddr, &tmpl->saddr, sizeof(x->props.saddr));
+ if (ipv6_addr_any((struct in6_addr *)&x->props.saddr))
+ memcpy(&x->props.saddr, saddr, sizeof(x->props.saddr));
+ break;
+ }
+
+ x->props.mode = tmpl->mode;
+ x->props.reqid = tmpl->reqid;
+ x->props.family = tmpl->encap_family;
+}
+
+static struct xfrm_state *__xfrm_state_lookup(struct net *net, u32 mark,
+ const xfrm_address_t *daddr,
+ __be32 spi, u8 proto,
+ unsigned short family)
+{
+ unsigned int h = xfrm_spi_hash(net, daddr, spi, proto, family);
+ struct xfrm_state *x;
+
+ hlist_for_each_entry_rcu(x, net->xfrm.state_byspi + h, byspi) {
+ if (x->props.family != family ||
+ x->id.spi != spi ||
+ x->id.proto != proto ||
+ !xfrm_addr_equal(&x->id.daddr, daddr, family))
+ continue;
+
+ if ((mark & x->mark.m) != x->mark.v)
+ continue;
+ if (!xfrm_state_hold_rcu(x))
+ continue;
+ return x;
+ }
+
+ return NULL;
+}
+
+static struct xfrm_state *__xfrm_state_lookup_byaddr(struct net *net, u32 mark,
+ const xfrm_address_t *daddr,
+ const xfrm_address_t *saddr,
+ u8 proto, unsigned short family)
+{
+ unsigned int h = xfrm_src_hash(net, daddr, saddr, family);
+ struct xfrm_state *x;
+
+ hlist_for_each_entry_rcu(x, net->xfrm.state_bysrc + h, bysrc) {
+ if (x->props.family != family ||
+ x->id.proto != proto ||
+ !xfrm_addr_equal(&x->id.daddr, daddr, family) ||
+ !xfrm_addr_equal(&x->props.saddr, saddr, family))
+ continue;
+
+ if ((mark & x->mark.m) != x->mark.v)
+ continue;
+ if (!xfrm_state_hold_rcu(x))
+ continue;
+ return x;
+ }
+
+ return NULL;
+}
+
+static inline struct xfrm_state *
+__xfrm_state_locate(struct xfrm_state *x, int use_spi, int family)
+{
+ struct net *net = xs_net(x);
+ u32 mark = x->mark.v & x->mark.m;
+
+ if (use_spi)
+ return __xfrm_state_lookup(net, mark, &x->id.daddr,
+ x->id.spi, x->id.proto, family);
+ else
+ return __xfrm_state_lookup_byaddr(net, mark,
+ &x->id.daddr,
+ &x->props.saddr,
+ x->id.proto, family);
+}
+
+static void xfrm_hash_grow_check(struct net *net, int have_hash_collision)
+{
+ if (have_hash_collision &&
+ (net->xfrm.state_hmask + 1) < xfrm_state_hashmax &&
+ net->xfrm.state_num > net->xfrm.state_hmask)
+ schedule_work(&net->xfrm.state_hash_work);
+}
+
+static void xfrm_state_look_at(struct xfrm_policy *pol, struct xfrm_state *x,
+ const struct flowi *fl, unsigned short family,
+ struct xfrm_state **best, int *acq_in_progress,
+ int *error)
+{
+ /* Resolution logic:
+ * 1. There is a valid state with matching selector. Done.
+ * 2. Valid state with inappropriate selector. Skip.
+ *
+ * Entering area of "sysdeps".
+ *
+ * 3. If state is not valid, selector is temporary, it selects
+ * only session which triggered previous resolution. Key
+ * manager will do something to install a state with proper
+ * selector.
+ */
+ if (x->km.state == XFRM_STATE_VALID) {
+ if ((x->sel.family &&
+ (x->sel.family != family ||
+ !xfrm_selector_match(&x->sel, fl, family))) ||
+ !security_xfrm_state_pol_flow_match(x, pol,
+ &fl->u.__fl_common))
+ return;
+
+ if (!*best ||
+ (*best)->km.dying > x->km.dying ||
+ ((*best)->km.dying == x->km.dying &&
+ (*best)->curlft.add_time < x->curlft.add_time))
+ *best = x;
+ } else if (x->km.state == XFRM_STATE_ACQ) {
+ *acq_in_progress = 1;
+ } else if (x->km.state == XFRM_STATE_ERROR ||
+ x->km.state == XFRM_STATE_EXPIRED) {
+ if ((!x->sel.family ||
+ (x->sel.family == family &&
+ xfrm_selector_match(&x->sel, fl, family))) &&
+ security_xfrm_state_pol_flow_match(x, pol,
+ &fl->u.__fl_common))
+ *error = -ESRCH;
+ }
+}
+
+struct xfrm_state *
+xfrm_state_find(const xfrm_address_t *daddr, const xfrm_address_t *saddr,
+ const struct flowi *fl, struct xfrm_tmpl *tmpl,
+ struct xfrm_policy *pol, int *err,
+ unsigned short family, u32 if_id)
+{
+ static xfrm_address_t saddr_wildcard = { };
+ struct net *net = xp_net(pol);
+ unsigned int h, h_wildcard;
+ struct xfrm_state *x, *x0, *to_put;
+ int acquire_in_progress = 0;
+ int error = 0;
+ struct xfrm_state *best = NULL;
+ u32 mark = pol->mark.v & pol->mark.m;
+ unsigned short encap_family = tmpl->encap_family;
+ unsigned int sequence;
+ struct km_event c;
+
+ to_put = NULL;
+
+ sequence = read_seqcount_begin(&net->xfrm.xfrm_state_hash_generation);
+
+ rcu_read_lock();
+ h = xfrm_dst_hash(net, daddr, saddr, tmpl->reqid, encap_family);
+ hlist_for_each_entry_rcu(x, net->xfrm.state_bydst + h, bydst) {
+ if (x->props.family == encap_family &&
+ x->props.reqid == tmpl->reqid &&
+ (mark & x->mark.m) == x->mark.v &&
+ x->if_id == if_id &&
+ !(x->props.flags & XFRM_STATE_WILDRECV) &&
+ xfrm_state_addr_check(x, daddr, saddr, encap_family) &&
+ tmpl->mode == x->props.mode &&
+ tmpl->id.proto == x->id.proto &&
+ (tmpl->id.spi == x->id.spi || !tmpl->id.spi))
+ xfrm_state_look_at(pol, x, fl, family,
+ &best, &acquire_in_progress, &error);
+ }
+ if (best || acquire_in_progress)
+ goto found;
+
+ h_wildcard = xfrm_dst_hash(net, daddr, &saddr_wildcard, tmpl->reqid, encap_family);
+ hlist_for_each_entry_rcu(x, net->xfrm.state_bydst + h_wildcard, bydst) {
+ if (x->props.family == encap_family &&
+ x->props.reqid == tmpl->reqid &&
+ (mark & x->mark.m) == x->mark.v &&
+ x->if_id == if_id &&
+ !(x->props.flags & XFRM_STATE_WILDRECV) &&
+ xfrm_addr_equal(&x->id.daddr, daddr, encap_family) &&
+ tmpl->mode == x->props.mode &&
+ tmpl->id.proto == x->id.proto &&
+ (tmpl->id.spi == x->id.spi || !tmpl->id.spi))
+ xfrm_state_look_at(pol, x, fl, family,
+ &best, &acquire_in_progress, &error);
+ }
+
+found:
+ x = best;
+ if (!x && !error && !acquire_in_progress) {
+ if (tmpl->id.spi &&
+ (x0 = __xfrm_state_lookup(net, mark, daddr, tmpl->id.spi,
+ tmpl->id.proto, encap_family)) != NULL) {
+ to_put = x0;
+ error = -EEXIST;
+ goto out;
+ }
+
+ c.net = net;
+ /* If the KMs have no listeners (yet...), avoid allocating an SA
+ * for each and every packet - garbage collection might not
+ * handle the flood.
+ */
+ if (!km_is_alive(&c)) {
+ error = -ESRCH;
+ goto out;
+ }
+
+ x = xfrm_state_alloc(net);
+ if (x == NULL) {
+ error = -ENOMEM;
+ goto out;
+ }
+ /* Initialize temporary state matching only
+ * to current session. */
+ xfrm_init_tempstate(x, fl, tmpl, daddr, saddr, family);
+ memcpy(&x->mark, &pol->mark, sizeof(x->mark));
+ x->if_id = if_id;
+
+ error = security_xfrm_state_alloc_acquire(x, pol->security, fl->flowi_secid);
+ if (error) {
+ x->km.state = XFRM_STATE_DEAD;
+ to_put = x;
+ x = NULL;
+ goto out;
+ }
+
+ if (km_query(x, tmpl, pol) == 0) {
+ spin_lock_bh(&net->xfrm.xfrm_state_lock);
+ x->km.state = XFRM_STATE_ACQ;
+ list_add(&x->km.all, &net->xfrm.state_all);
+ hlist_add_head_rcu(&x->bydst, net->xfrm.state_bydst + h);
+ h = xfrm_src_hash(net, daddr, saddr, encap_family);
+ hlist_add_head_rcu(&x->bysrc, net->xfrm.state_bysrc + h);
+ if (x->id.spi) {
+ h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, encap_family);
+ hlist_add_head_rcu(&x->byspi, net->xfrm.state_byspi + h);
+ }
+ if (x->km.seq) {
+ h = xfrm_seq_hash(net, x->km.seq);
+ hlist_add_head_rcu(&x->byseq, net->xfrm.state_byseq + h);
+ }
+ x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires;
+ hrtimer_start(&x->mtimer,
+ ktime_set(net->xfrm.sysctl_acq_expires, 0),
+ HRTIMER_MODE_REL_SOFT);
+ net->xfrm.state_num++;
+ xfrm_hash_grow_check(net, x->bydst.next != NULL);
+ spin_unlock_bh(&net->xfrm.xfrm_state_lock);
+ } else {
+ x->km.state = XFRM_STATE_DEAD;
+ to_put = x;
+ x = NULL;
+ error = -ESRCH;
+ }
+ }
+out:
+ if (x) {
+ if (!xfrm_state_hold_rcu(x)) {
+ *err = -EAGAIN;
+ x = NULL;
+ }
+ } else {
+ *err = acquire_in_progress ? -EAGAIN : error;
+ }
+ rcu_read_unlock();
+ if (to_put)
+ xfrm_state_put(to_put);
+
+ if (read_seqcount_retry(&net->xfrm.xfrm_state_hash_generation, sequence)) {
+ *err = -EAGAIN;
+ if (x) {
+ xfrm_state_put(x);
+ x = NULL;
+ }
+ }
+
+ return x;
+}
+
+struct xfrm_state *
+xfrm_stateonly_find(struct net *net, u32 mark, u32 if_id,
+ xfrm_address_t *daddr, xfrm_address_t *saddr,
+ unsigned short family, u8 mode, u8 proto, u32 reqid)
+{
+ unsigned int h;
+ struct xfrm_state *rx = NULL, *x = NULL;
+
+ spin_lock_bh(&net->xfrm.xfrm_state_lock);
+ h = xfrm_dst_hash(net, daddr, saddr, reqid, family);
+ hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) {
+ if (x->props.family == family &&
+ x->props.reqid == reqid &&
+ (mark & x->mark.m) == x->mark.v &&
+ x->if_id == if_id &&
+ !(x->props.flags & XFRM_STATE_WILDRECV) &&
+ xfrm_state_addr_check(x, daddr, saddr, family) &&
+ mode == x->props.mode &&
+ proto == x->id.proto &&
+ x->km.state == XFRM_STATE_VALID) {
+ rx = x;
+ break;
+ }
+ }
+
+ if (rx)
+ xfrm_state_hold(rx);
+ spin_unlock_bh(&net->xfrm.xfrm_state_lock);
+
+
+ return rx;
+}
+EXPORT_SYMBOL(xfrm_stateonly_find);
+
+struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi,
+ unsigned short family)
+{
+ struct xfrm_state *x;
+ struct xfrm_state_walk *w;
+
+ spin_lock_bh(&net->xfrm.xfrm_state_lock);
+ list_for_each_entry(w, &net->xfrm.state_all, all) {
+ x = container_of(w, struct xfrm_state, km);
+ if (x->props.family != family ||
+ x->id.spi != spi)
+ continue;
+
+ xfrm_state_hold(x);
+ spin_unlock_bh(&net->xfrm.xfrm_state_lock);
+ return x;
+ }
+ spin_unlock_bh(&net->xfrm.xfrm_state_lock);
+ return NULL;
+}
+EXPORT_SYMBOL(xfrm_state_lookup_byspi);
+
+static void __xfrm_state_insert(struct xfrm_state *x)
+{
+ struct net *net = xs_net(x);
+ unsigned int h;
+
+ list_add(&x->km.all, &net->xfrm.state_all);
+
+ h = xfrm_dst_hash(net, &x->id.daddr, &x->props.saddr,
+ x->props.reqid, x->props.family);
+ hlist_add_head_rcu(&x->bydst, net->xfrm.state_bydst + h);
+
+ h = xfrm_src_hash(net, &x->id.daddr, &x->props.saddr, x->props.family);
+ hlist_add_head_rcu(&x->bysrc, net->xfrm.state_bysrc + h);
+
+ if (x->id.spi) {
+ h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto,
+ x->props.family);
+
+ hlist_add_head_rcu(&x->byspi, net->xfrm.state_byspi + h);
+ }
+
+ if (x->km.seq) {
+ h = xfrm_seq_hash(net, x->km.seq);
+
+ hlist_add_head_rcu(&x->byseq, net->xfrm.state_byseq + h);
+ }
+
+ hrtimer_start(&x->mtimer, ktime_set(1, 0), HRTIMER_MODE_REL_SOFT);
+ if (x->replay_maxage)
+ mod_timer(&x->rtimer, jiffies + x->replay_maxage);
+
+ net->xfrm.state_num++;
+
+ xfrm_hash_grow_check(net, x->bydst.next != NULL);
+}
+
+/* net->xfrm.xfrm_state_lock is held */
+static void __xfrm_state_bump_genids(struct xfrm_state *xnew)
+{
+ struct net *net = xs_net(xnew);
+ unsigned short family = xnew->props.family;
+ u32 reqid = xnew->props.reqid;
+ struct xfrm_state *x;
+ unsigned int h;
+ u32 mark = xnew->mark.v & xnew->mark.m;
+ u32 if_id = xnew->if_id;
+
+ h = xfrm_dst_hash(net, &xnew->id.daddr, &xnew->props.saddr, reqid, family);
+ hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) {
+ if (x->props.family == family &&
+ x->props.reqid == reqid &&
+ x->if_id == if_id &&
+ (mark & x->mark.m) == x->mark.v &&
+ xfrm_addr_equal(&x->id.daddr, &xnew->id.daddr, family) &&
+ xfrm_addr_equal(&x->props.saddr, &xnew->props.saddr, family))
+ x->genid++;
+ }
+}
+
+void xfrm_state_insert(struct xfrm_state *x)
+{
+ struct net *net = xs_net(x);
+
+ spin_lock_bh(&net->xfrm.xfrm_state_lock);
+ __xfrm_state_bump_genids(x);
+ __xfrm_state_insert(x);
+ spin_unlock_bh(&net->xfrm.xfrm_state_lock);
+}
+EXPORT_SYMBOL(xfrm_state_insert);
+
+/* net->xfrm.xfrm_state_lock is held */
+static struct xfrm_state *__find_acq_core(struct net *net,
+ const struct xfrm_mark *m,
+ unsigned short family, u8 mode,
+ u32 reqid, u32 if_id, u8 proto,
+ const xfrm_address_t *daddr,
+ const xfrm_address_t *saddr,
+ int create)
+{
+ unsigned int h = xfrm_dst_hash(net, daddr, saddr, reqid, family);
+ struct xfrm_state *x;
+ u32 mark = m->v & m->m;
+
+ hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) {
+ if (x->props.reqid != reqid ||
+ x->props.mode != mode ||
+ x->props.family != family ||
+ x->km.state != XFRM_STATE_ACQ ||
+ x->id.spi != 0 ||
+ x->id.proto != proto ||
+ (mark & x->mark.m) != x->mark.v ||
+ !xfrm_addr_equal(&x->id.daddr, daddr, family) ||
+ !xfrm_addr_equal(&x->props.saddr, saddr, family))
+ continue;
+
+ xfrm_state_hold(x);
+ return x;
+ }
+
+ if (!create)
+ return NULL;
+
+ x = xfrm_state_alloc(net);
+ if (likely(x)) {
+ switch (family) {
+ case AF_INET:
+ x->sel.daddr.a4 = daddr->a4;
+ x->sel.saddr.a4 = saddr->a4;
+ x->sel.prefixlen_d = 32;
+ x->sel.prefixlen_s = 32;
+ x->props.saddr.a4 = saddr->a4;
+ x->id.daddr.a4 = daddr->a4;
+ break;
+
+ case AF_INET6:
+ x->sel.daddr.in6 = daddr->in6;
+ x->sel.saddr.in6 = saddr->in6;
+ x->sel.prefixlen_d = 128;
+ x->sel.prefixlen_s = 128;
+ x->props.saddr.in6 = saddr->in6;
+ x->id.daddr.in6 = daddr->in6;
+ break;
+ }
+
+ x->km.state = XFRM_STATE_ACQ;
+ x->id.proto = proto;
+ x->props.family = family;
+ x->props.mode = mode;
+ x->props.reqid = reqid;
+ x->if_id = if_id;
+ x->mark.v = m->v;
+ x->mark.m = m->m;
+ x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires;
+ xfrm_state_hold(x);
+ hrtimer_start(&x->mtimer,
+ ktime_set(net->xfrm.sysctl_acq_expires, 0),
+ HRTIMER_MODE_REL_SOFT);
+ list_add(&x->km.all, &net->xfrm.state_all);
+ hlist_add_head_rcu(&x->bydst, net->xfrm.state_bydst + h);
+ h = xfrm_src_hash(net, daddr, saddr, family);
+ hlist_add_head_rcu(&x->bysrc, net->xfrm.state_bysrc + h);
+
+ net->xfrm.state_num++;
+
+ xfrm_hash_grow_check(net, x->bydst.next != NULL);
+ }
+
+ return x;
+}
+
+static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq);
+
+int xfrm_state_add(struct xfrm_state *x)
+{
+ struct net *net = xs_net(x);
+ struct xfrm_state *x1, *to_put;
+ int family;
+ int err;
+ u32 mark = x->mark.v & x->mark.m;
+ int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY);
+
+ family = x->props.family;
+
+ to_put = NULL;
+
+ spin_lock_bh(&net->xfrm.xfrm_state_lock);
+
+ x1 = __xfrm_state_locate(x, use_spi, family);
+ if (x1) {
+ to_put = x1;
+ x1 = NULL;
+ err = -EEXIST;
+ goto out;
+ }
+
+ if (use_spi && x->km.seq) {
+ x1 = __xfrm_find_acq_byseq(net, mark, x->km.seq);
+ if (x1 && ((x1->id.proto != x->id.proto) ||
+ !xfrm_addr_equal(&x1->id.daddr, &x->id.daddr, family))) {
+ to_put = x1;
+ x1 = NULL;
+ }
+ }
+
+ if (use_spi && !x1)
+ x1 = __find_acq_core(net, &x->mark, family, x->props.mode,
+ x->props.reqid, x->if_id, x->id.proto,
+ &x->id.daddr, &x->props.saddr, 0);
+
+ __xfrm_state_bump_genids(x);
+ __xfrm_state_insert(x);
+ err = 0;
+
+out:
+ spin_unlock_bh(&net->xfrm.xfrm_state_lock);
+
+ if (x1) {
+ xfrm_state_delete(x1);
+ xfrm_state_put(x1);
+ }
+
+ if (to_put)
+ xfrm_state_put(to_put);
+
+ return err;
+}
+EXPORT_SYMBOL(xfrm_state_add);
+
+#ifdef CONFIG_XFRM_MIGRATE
+static inline int clone_security(struct xfrm_state *x, struct xfrm_sec_ctx *security)
+{
+ struct xfrm_user_sec_ctx *uctx;
+ int size = sizeof(*uctx) + security->ctx_len;
+ int err;
+
+ uctx = kmalloc(size, GFP_KERNEL);
+ if (!uctx)
+ return -ENOMEM;
+
+ uctx->exttype = XFRMA_SEC_CTX;
+ uctx->len = size;
+ uctx->ctx_doi = security->ctx_doi;
+ uctx->ctx_alg = security->ctx_alg;
+ uctx->ctx_len = security->ctx_len;
+ memcpy(uctx + 1, security->ctx_str, security->ctx_len);
+ err = security_xfrm_state_alloc(x, uctx);
+ kfree(uctx);
+ if (err)
+ return err;
+
+ return 0;
+}
+
+static struct xfrm_state *xfrm_state_clone(struct xfrm_state *orig,
+ struct xfrm_encap_tmpl *encap)
+{
+ struct net *net = xs_net(orig);
+ struct xfrm_state *x = xfrm_state_alloc(net);
+ if (!x)
+ goto out;
+
+ memcpy(&x->id, &orig->id, sizeof(x->id));
+ memcpy(&x->sel, &orig->sel, sizeof(x->sel));
+ memcpy(&x->lft, &orig->lft, sizeof(x->lft));
+ x->props.mode = orig->props.mode;
+ x->props.replay_window = orig->props.replay_window;
+ x->props.reqid = orig->props.reqid;
+ x->props.family = orig->props.family;
+ x->props.saddr = orig->props.saddr;
+
+ if (orig->aalg) {
+ x->aalg = xfrm_algo_auth_clone(orig->aalg);
+ if (!x->aalg)
+ goto error;
+ }
+ x->props.aalgo = orig->props.aalgo;
+
+ if (orig->aead) {
+ x->aead = xfrm_algo_aead_clone(orig->aead);
+ x->geniv = orig->geniv;
+ if (!x->aead)
+ goto error;
+ }
+ if (orig->ealg) {
+ x->ealg = xfrm_algo_clone(orig->ealg);
+ if (!x->ealg)
+ goto error;
+ }
+ x->props.ealgo = orig->props.ealgo;
+
+ if (orig->calg) {
+ x->calg = xfrm_algo_clone(orig->calg);
+ if (!x->calg)
+ goto error;
+ }
+ x->props.calgo = orig->props.calgo;
+
+ if (encap || orig->encap) {
+ if (encap)
+ x->encap = kmemdup(encap, sizeof(*x->encap),
+ GFP_KERNEL);
+ else
+ x->encap = kmemdup(orig->encap, sizeof(*x->encap),
+ GFP_KERNEL);
+
+ if (!x->encap)
+ goto error;
+ }
+
+ if (orig->security)
+ if (clone_security(x, orig->security))
+ goto error;
+
+ if (orig->coaddr) {
+ x->coaddr = kmemdup(orig->coaddr, sizeof(*x->coaddr),
+ GFP_KERNEL);
+ if (!x->coaddr)
+ goto error;
+ }
+
+ if (orig->replay_esn) {
+ if (xfrm_replay_clone(x, orig))
+ goto error;
+ }
+
+ memcpy(&x->mark, &orig->mark, sizeof(x->mark));
+ memcpy(&x->props.smark, &orig->props.smark, sizeof(x->props.smark));
+
+ x->props.flags = orig->props.flags;
+ x->props.extra_flags = orig->props.extra_flags;
+
+ x->if_id = orig->if_id;
+ x->tfcpad = orig->tfcpad;
+ x->replay_maxdiff = orig->replay_maxdiff;
+ x->replay_maxage = orig->replay_maxage;
+ memcpy(&x->curlft, &orig->curlft, sizeof(x->curlft));
+ x->km.state = orig->km.state;
+ x->km.seq = orig->km.seq;
+ x->replay = orig->replay;
+ x->preplay = orig->preplay;
+ x->mapping_maxage = orig->mapping_maxage;
+ x->lastused = orig->lastused;
+ x->new_mapping = 0;
+ x->new_mapping_sport = 0;
+
+ return x;
+
+ error:
+ xfrm_state_put(x);
+out:
+ return NULL;
+}
+
+struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net,
+ u32 if_id)
+{
+ unsigned int h;
+ struct xfrm_state *x = NULL;
+
+ spin_lock_bh(&net->xfrm.xfrm_state_lock);
+
+ if (m->reqid) {
+ h = xfrm_dst_hash(net, &m->old_daddr, &m->old_saddr,
+ m->reqid, m->old_family);
+ hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) {
+ if (x->props.mode != m->mode ||
+ x->id.proto != m->proto)
+ continue;
+ if (m->reqid && x->props.reqid != m->reqid)
+ continue;
+ if (if_id != 0 && x->if_id != if_id)
+ continue;
+ if (!xfrm_addr_equal(&x->id.daddr, &m->old_daddr,
+ m->old_family) ||
+ !xfrm_addr_equal(&x->props.saddr, &m->old_saddr,
+ m->old_family))
+ continue;
+ xfrm_state_hold(x);
+ break;
+ }
+ } else {
+ h = xfrm_src_hash(net, &m->old_daddr, &m->old_saddr,
+ m->old_family);
+ hlist_for_each_entry(x, net->xfrm.state_bysrc+h, bysrc) {
+ if (x->props.mode != m->mode ||
+ x->id.proto != m->proto)
+ continue;
+ if (if_id != 0 && x->if_id != if_id)
+ continue;
+ if (!xfrm_addr_equal(&x->id.daddr, &m->old_daddr,
+ m->old_family) ||
+ !xfrm_addr_equal(&x->props.saddr, &m->old_saddr,
+ m->old_family))
+ continue;
+ xfrm_state_hold(x);
+ break;
+ }
+ }
+
+ spin_unlock_bh(&net->xfrm.xfrm_state_lock);
+
+ return x;
+}
+EXPORT_SYMBOL(xfrm_migrate_state_find);
+
+struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x,
+ struct xfrm_migrate *m,
+ struct xfrm_encap_tmpl *encap)
+{
+ struct xfrm_state *xc;
+
+ xc = xfrm_state_clone(x, encap);
+ if (!xc)
+ return NULL;
+
+ xc->props.family = m->new_family;
+
+ if (xfrm_init_state(xc) < 0)
+ goto error;
+
+ memcpy(&xc->id.daddr, &m->new_daddr, sizeof(xc->id.daddr));
+ memcpy(&xc->props.saddr, &m->new_saddr, sizeof(xc->props.saddr));
+
+ /* add state */
+ if (xfrm_addr_equal(&x->id.daddr, &m->new_daddr, m->new_family)) {
+ /* a care is needed when the destination address of the
+ state is to be updated as it is a part of triplet */
+ xfrm_state_insert(xc);
+ } else {
+ if (xfrm_state_add(xc) < 0)
+ goto error;
+ }
+
+ return xc;
+error:
+ xfrm_state_put(xc);
+ return NULL;
+}
+EXPORT_SYMBOL(xfrm_state_migrate);
+#endif
+
+int xfrm_state_update(struct xfrm_state *x)
+{
+ struct xfrm_state *x1, *to_put;
+ int err;
+ int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY);
+ struct net *net = xs_net(x);
+
+ to_put = NULL;
+
+ spin_lock_bh(&net->xfrm.xfrm_state_lock);
+ x1 = __xfrm_state_locate(x, use_spi, x->props.family);
+
+ err = -ESRCH;
+ if (!x1)
+ goto out;
+
+ if (xfrm_state_kern(x1)) {
+ to_put = x1;
+ err = -EEXIST;
+ goto out;
+ }
+
+ if (x1->km.state == XFRM_STATE_ACQ) {
+ __xfrm_state_insert(x);
+ x = NULL;
+ }
+ err = 0;
+
+out:
+ spin_unlock_bh(&net->xfrm.xfrm_state_lock);
+
+ if (to_put)
+ xfrm_state_put(to_put);
+
+ if (err)
+ return err;
+
+ if (!x) {
+ xfrm_state_delete(x1);
+ xfrm_state_put(x1);
+ return 0;
+ }
+
+ err = -EINVAL;
+ spin_lock_bh(&x1->lock);
+ if (likely(x1->km.state == XFRM_STATE_VALID)) {
+ if (x->encap && x1->encap &&
+ x->encap->encap_type == x1->encap->encap_type)
+ memcpy(x1->encap, x->encap, sizeof(*x1->encap));
+ else if (x->encap || x1->encap)
+ goto fail;
+
+ if (x->coaddr && x1->coaddr) {
+ memcpy(x1->coaddr, x->coaddr, sizeof(*x1->coaddr));
+ }
+ if (!use_spi && memcmp(&x1->sel, &x->sel, sizeof(x1->sel)))
+ memcpy(&x1->sel, &x->sel, sizeof(x1->sel));
+ memcpy(&x1->lft, &x->lft, sizeof(x1->lft));
+ x1->km.dying = 0;
+
+ hrtimer_start(&x1->mtimer, ktime_set(1, 0),
+ HRTIMER_MODE_REL_SOFT);
+ if (READ_ONCE(x1->curlft.use_time))
+ xfrm_state_check_expire(x1);
+
+ if (x->props.smark.m || x->props.smark.v || x->if_id) {
+ spin_lock_bh(&net->xfrm.xfrm_state_lock);
+
+ if (x->props.smark.m || x->props.smark.v)
+ x1->props.smark = x->props.smark;
+
+ if (x->if_id)
+ x1->if_id = x->if_id;
+
+ __xfrm_state_bump_genids(x1);
+ spin_unlock_bh(&net->xfrm.xfrm_state_lock);
+ }
+
+ err = 0;
+ x->km.state = XFRM_STATE_DEAD;
+ __xfrm_state_put(x);
+ }
+
+fail:
+ spin_unlock_bh(&x1->lock);
+
+ xfrm_state_put(x1);
+
+ return err;
+}
+EXPORT_SYMBOL(xfrm_state_update);
+
+int xfrm_state_check_expire(struct xfrm_state *x)
+{
+ if (!READ_ONCE(x->curlft.use_time))
+ WRITE_ONCE(x->curlft.use_time, ktime_get_real_seconds());
+
+ if (x->curlft.bytes >= x->lft.hard_byte_limit ||
+ x->curlft.packets >= x->lft.hard_packet_limit) {
+ x->km.state = XFRM_STATE_EXPIRED;
+ hrtimer_start(&x->mtimer, 0, HRTIMER_MODE_REL_SOFT);
+ return -EINVAL;
+ }
+
+ if (!x->km.dying &&
+ (x->curlft.bytes >= x->lft.soft_byte_limit ||
+ x->curlft.packets >= x->lft.soft_packet_limit)) {
+ x->km.dying = 1;
+ km_state_expired(x, 0, 0);
+ }
+ return 0;
+}
+EXPORT_SYMBOL(xfrm_state_check_expire);
+
+struct xfrm_state *
+xfrm_state_lookup(struct net *net, u32 mark, const xfrm_address_t *daddr, __be32 spi,
+ u8 proto, unsigned short family)
+{
+ struct xfrm_state *x;
+
+ rcu_read_lock();
+ x = __xfrm_state_lookup(net, mark, daddr, spi, proto, family);
+ rcu_read_unlock();
+ return x;
+}
+EXPORT_SYMBOL(xfrm_state_lookup);
+
+struct xfrm_state *
+xfrm_state_lookup_byaddr(struct net *net, u32 mark,
+ const xfrm_address_t *daddr, const xfrm_address_t *saddr,
+ u8 proto, unsigned short family)
+{
+ struct xfrm_state *x;
+
+ spin_lock_bh(&net->xfrm.xfrm_state_lock);
+ x = __xfrm_state_lookup_byaddr(net, mark, daddr, saddr, proto, family);
+ spin_unlock_bh(&net->xfrm.xfrm_state_lock);
+ return x;
+}
+EXPORT_SYMBOL(xfrm_state_lookup_byaddr);
+
+struct xfrm_state *
+xfrm_find_acq(struct net *net, const struct xfrm_mark *mark, u8 mode, u32 reqid,
+ u32 if_id, u8 proto, const xfrm_address_t *daddr,
+ const xfrm_address_t *saddr, int create, unsigned short family)
+{
+ struct xfrm_state *x;
+
+ spin_lock_bh(&net->xfrm.xfrm_state_lock);
+ x = __find_acq_core(net, mark, family, mode, reqid, if_id, proto, daddr, saddr, create);
+ spin_unlock_bh(&net->xfrm.xfrm_state_lock);
+
+ return x;
+}
+EXPORT_SYMBOL(xfrm_find_acq);
+
+#ifdef CONFIG_XFRM_SUB_POLICY
+#if IS_ENABLED(CONFIG_IPV6)
+/* distribution counting sort function for xfrm_state and xfrm_tmpl */
+static void
+__xfrm6_sort(void **dst, void **src, int n,
+ int (*cmp)(const void *p), int maxclass)
+{
+ int count[XFRM_MAX_DEPTH] = { };
+ int class[XFRM_MAX_DEPTH];
+ int i;
+
+ for (i = 0; i < n; i++) {
+ int c = cmp(src[i]);
+
+ class[i] = c;
+ count[c]++;
+ }
+
+ for (i = 2; i < maxclass; i++)
+ count[i] += count[i - 1];
+
+ for (i = 0; i < n; i++) {
+ dst[count[class[i] - 1]++] = src[i];
+ src[i] = NULL;
+ }
+}
+
+/* Rule for xfrm_state:
+ *
+ * rule 1: select IPsec transport except AH
+ * rule 2: select MIPv6 RO or inbound trigger
+ * rule 3: select IPsec transport AH
+ * rule 4: select IPsec tunnel
+ * rule 5: others
+ */
+static int __xfrm6_state_sort_cmp(const void *p)
+{
+ const struct xfrm_state *v = p;
+
+ switch (v->props.mode) {
+ case XFRM_MODE_TRANSPORT:
+ if (v->id.proto != IPPROTO_AH)
+ return 1;
+ else
+ return 3;
+#if IS_ENABLED(CONFIG_IPV6_MIP6)
+ case XFRM_MODE_ROUTEOPTIMIZATION:
+ case XFRM_MODE_IN_TRIGGER:
+ return 2;
+#endif
+ case XFRM_MODE_TUNNEL:
+ case XFRM_MODE_BEET:
+ return 4;
+ }
+ return 5;
+}
+
+/* Rule for xfrm_tmpl:
+ *
+ * rule 1: select IPsec transport
+ * rule 2: select MIPv6 RO or inbound trigger
+ * rule 3: select IPsec tunnel
+ * rule 4: others
+ */
+static int __xfrm6_tmpl_sort_cmp(const void *p)
+{
+ const struct xfrm_tmpl *v = p;
+
+ switch (v->mode) {
+ case XFRM_MODE_TRANSPORT:
+ return 1;
+#if IS_ENABLED(CONFIG_IPV6_MIP6)
+ case XFRM_MODE_ROUTEOPTIMIZATION:
+ case XFRM_MODE_IN_TRIGGER:
+ return 2;
+#endif
+ case XFRM_MODE_TUNNEL:
+ case XFRM_MODE_BEET:
+ return 3;
+ }
+ return 4;
+}
+#else
+static inline int __xfrm6_state_sort_cmp(const void *p) { return 5; }
+static inline int __xfrm6_tmpl_sort_cmp(const void *p) { return 4; }
+
+static inline void
+__xfrm6_sort(void **dst, void **src, int n,
+ int (*cmp)(const void *p), int maxclass)
+{
+ int i;
+
+ for (i = 0; i < n; i++)
+ dst[i] = src[i];
+}
+#endif /* CONFIG_IPV6 */
+
+void
+xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n,
+ unsigned short family)
+{
+ int i;
+
+ if (family == AF_INET6)
+ __xfrm6_sort((void **)dst, (void **)src, n,
+ __xfrm6_tmpl_sort_cmp, 5);
+ else
+ for (i = 0; i < n; i++)
+ dst[i] = src[i];
+}
+
+void
+xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n,
+ unsigned short family)
+{
+ int i;
+
+ if (family == AF_INET6)
+ __xfrm6_sort((void **)dst, (void **)src, n,
+ __xfrm6_state_sort_cmp, 6);
+ else
+ for (i = 0; i < n; i++)
+ dst[i] = src[i];
+}
+#endif
+
+/* Silly enough, but I'm lazy to build resolution list */
+
+static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq)
+{
+ unsigned int h = xfrm_seq_hash(net, seq);
+ struct xfrm_state *x;
+
+ hlist_for_each_entry_rcu(x, net->xfrm.state_byseq + h, byseq) {
+ if (x->km.seq == seq &&
+ (mark & x->mark.m) == x->mark.v &&
+ x->km.state == XFRM_STATE_ACQ) {
+ xfrm_state_hold(x);
+ return x;
+ }
+ }
+
+ return NULL;
+}
+
+struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq)
+{
+ struct xfrm_state *x;
+
+ spin_lock_bh(&net->xfrm.xfrm_state_lock);
+ x = __xfrm_find_acq_byseq(net, mark, seq);
+ spin_unlock_bh(&net->xfrm.xfrm_state_lock);
+ return x;
+}
+EXPORT_SYMBOL(xfrm_find_acq_byseq);
+
+u32 xfrm_get_acqseq(void)
+{
+ u32 res;
+ static atomic_t acqseq;
+
+ do {
+ res = atomic_inc_return(&acqseq);
+ } while (!res);
+
+ return res;
+}
+EXPORT_SYMBOL(xfrm_get_acqseq);
+
+int verify_spi_info(u8 proto, u32 min, u32 max)
+{
+ switch (proto) {
+ case IPPROTO_AH:
+ case IPPROTO_ESP:
+ break;
+
+ case IPPROTO_COMP:
+ /* IPCOMP spi is 16-bits. */
+ if (max >= 0x10000)
+ return -EINVAL;
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ if (min > max)
+ return -EINVAL;
+
+ return 0;
+}
+EXPORT_SYMBOL(verify_spi_info);
+
+int xfrm_alloc_spi(struct xfrm_state *x, u32 low, u32 high)
+{
+ struct net *net = xs_net(x);
+ unsigned int h;
+ struct xfrm_state *x0;
+ int err = -ENOENT;
+ __be32 minspi = htonl(low);
+ __be32 maxspi = htonl(high);
+ __be32 newspi = 0;
+ u32 mark = x->mark.v & x->mark.m;
+
+ spin_lock_bh(&x->lock);
+ if (x->km.state == XFRM_STATE_DEAD)
+ goto unlock;
+
+ err = 0;
+ if (x->id.spi)
+ goto unlock;
+
+ err = -ENOENT;
+
+ if (minspi == maxspi) {
+ x0 = xfrm_state_lookup(net, mark, &x->id.daddr, minspi, x->id.proto, x->props.family);
+ if (x0) {
+ xfrm_state_put(x0);
+ goto unlock;
+ }
+ newspi = minspi;
+ } else {
+ u32 spi = 0;
+ for (h = 0; h < high-low+1; h++) {
+ spi = low + prandom_u32_max(high - low + 1);
+ x0 = xfrm_state_lookup(net, mark, &x->id.daddr, htonl(spi), x->id.proto, x->props.family);
+ if (x0 == NULL) {
+ newspi = htonl(spi);
+ break;
+ }
+ xfrm_state_put(x0);
+ }
+ }
+ if (newspi) {
+ spin_lock_bh(&net->xfrm.xfrm_state_lock);
+ x->id.spi = newspi;
+ h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, x->props.family);
+ hlist_add_head_rcu(&x->byspi, net->xfrm.state_byspi + h);
+ spin_unlock_bh(&net->xfrm.xfrm_state_lock);
+
+ err = 0;
+ }
+
+unlock:
+ spin_unlock_bh(&x->lock);
+
+ return err;
+}
+EXPORT_SYMBOL(xfrm_alloc_spi);
+
+static bool __xfrm_state_filter_match(struct xfrm_state *x,
+ struct xfrm_address_filter *filter)
+{
+ if (filter) {
+ if ((filter->family == AF_INET ||
+ filter->family == AF_INET6) &&
+ x->props.family != filter->family)
+ return false;
+
+ return addr_match(&x->props.saddr, &filter->saddr,
+ filter->splen) &&
+ addr_match(&x->id.daddr, &filter->daddr,
+ filter->dplen);
+ }
+ return true;
+}
+
+int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk,
+ int (*func)(struct xfrm_state *, int, void*),
+ void *data)
+{
+ struct xfrm_state *state;
+ struct xfrm_state_walk *x;
+ int err = 0;
+
+ if (walk->seq != 0 && list_empty(&walk->all))
+ return 0;
+
+ spin_lock_bh(&net->xfrm.xfrm_state_lock);
+ if (list_empty(&walk->all))
+ x = list_first_entry(&net->xfrm.state_all, struct xfrm_state_walk, all);
+ else
+ x = list_first_entry(&walk->all, struct xfrm_state_walk, all);
+ list_for_each_entry_from(x, &net->xfrm.state_all, all) {
+ if (x->state == XFRM_STATE_DEAD)
+ continue;
+ state = container_of(x, struct xfrm_state, km);
+ if (!xfrm_id_proto_match(state->id.proto, walk->proto))
+ continue;
+ if (!__xfrm_state_filter_match(state, walk->filter))
+ continue;
+ err = func(state, walk->seq, data);
+ if (err) {
+ list_move_tail(&walk->all, &x->all);
+ goto out;
+ }
+ walk->seq++;
+ }
+ if (walk->seq == 0) {
+ err = -ENOENT;
+ goto out;
+ }
+ list_del_init(&walk->all);
+out:
+ spin_unlock_bh(&net->xfrm.xfrm_state_lock);
+ return err;
+}
+EXPORT_SYMBOL(xfrm_state_walk);
+
+void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto,
+ struct xfrm_address_filter *filter)
+{
+ INIT_LIST_HEAD(&walk->all);
+ walk->proto = proto;
+ walk->state = XFRM_STATE_DEAD;
+ walk->seq = 0;
+ walk->filter = filter;
+}
+EXPORT_SYMBOL(xfrm_state_walk_init);
+
+void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net)
+{
+ kfree(walk->filter);
+
+ if (list_empty(&walk->all))
+ return;
+
+ spin_lock_bh(&net->xfrm.xfrm_state_lock);
+ list_del(&walk->all);
+ spin_unlock_bh(&net->xfrm.xfrm_state_lock);
+}
+EXPORT_SYMBOL(xfrm_state_walk_done);
+
+static void xfrm_replay_timer_handler(struct timer_list *t)
+{
+ struct xfrm_state *x = from_timer(x, t, rtimer);
+
+ spin_lock(&x->lock);
+
+ if (x->km.state == XFRM_STATE_VALID) {
+ if (xfrm_aevent_is_on(xs_net(x)))
+ xfrm_replay_notify(x, XFRM_REPLAY_TIMEOUT);
+ else
+ x->xflags |= XFRM_TIME_DEFER;
+ }
+
+ spin_unlock(&x->lock);
+}
+
+static LIST_HEAD(xfrm_km_list);
+
+void km_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
+{
+ struct xfrm_mgr *km;
+
+ rcu_read_lock();
+ list_for_each_entry_rcu(km, &xfrm_km_list, list)
+ if (km->notify_policy)
+ km->notify_policy(xp, dir, c);
+ rcu_read_unlock();
+}
+
+void km_state_notify(struct xfrm_state *x, const struct km_event *c)
+{
+ struct xfrm_mgr *km;
+ rcu_read_lock();
+ list_for_each_entry_rcu(km, &xfrm_km_list, list)
+ if (km->notify)
+ km->notify(x, c);
+ rcu_read_unlock();
+}
+
+EXPORT_SYMBOL(km_policy_notify);
+EXPORT_SYMBOL(km_state_notify);
+
+void km_state_expired(struct xfrm_state *x, int hard, u32 portid)
+{
+ struct km_event c;
+
+ c.data.hard = hard;
+ c.portid = portid;
+ c.event = XFRM_MSG_EXPIRE;
+ km_state_notify(x, &c);
+}
+
+EXPORT_SYMBOL(km_state_expired);
+/*
+ * We send to all registered managers regardless of failure
+ * We are happy with one success
+*/
+int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol)
+{
+ int err = -EINVAL, acqret;
+ struct xfrm_mgr *km;
+
+ rcu_read_lock();
+ list_for_each_entry_rcu(km, &xfrm_km_list, list) {
+ acqret = km->acquire(x, t, pol);
+ if (!acqret)
+ err = acqret;
+ }
+ rcu_read_unlock();
+ return err;
+}
+EXPORT_SYMBOL(km_query);
+
+static int __km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
+{
+ int err = -EINVAL;
+ struct xfrm_mgr *km;
+
+ rcu_read_lock();
+ list_for_each_entry_rcu(km, &xfrm_km_list, list) {
+ if (km->new_mapping)
+ err = km->new_mapping(x, ipaddr, sport);
+ if (!err)
+ break;
+ }
+ rcu_read_unlock();
+ return err;
+}
+
+int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
+{
+ int ret = 0;
+
+ if (x->mapping_maxage) {
+ if ((jiffies / HZ - x->new_mapping) > x->mapping_maxage ||
+ x->new_mapping_sport != sport) {
+ x->new_mapping_sport = sport;
+ x->new_mapping = jiffies / HZ;
+ ret = __km_new_mapping(x, ipaddr, sport);
+ }
+ } else {
+ ret = __km_new_mapping(x, ipaddr, sport);
+ }
+
+ return ret;
+}
+EXPORT_SYMBOL(km_new_mapping);
+
+void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid)
+{
+ struct km_event c;
+
+ c.data.hard = hard;
+ c.portid = portid;
+ c.event = XFRM_MSG_POLEXPIRE;
+ km_policy_notify(pol, dir, &c);
+}
+EXPORT_SYMBOL(km_policy_expired);
+
+#ifdef CONFIG_XFRM_MIGRATE
+int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
+ const struct xfrm_migrate *m, int num_migrate,
+ const struct xfrm_kmaddress *k,
+ const struct xfrm_encap_tmpl *encap)
+{
+ int err = -EINVAL;
+ int ret;
+ struct xfrm_mgr *km;
+
+ rcu_read_lock();
+ list_for_each_entry_rcu(km, &xfrm_km_list, list) {
+ if (km->migrate) {
+ ret = km->migrate(sel, dir, type, m, num_migrate, k,
+ encap);
+ if (!ret)
+ err = ret;
+ }
+ }
+ rcu_read_unlock();
+ return err;
+}
+EXPORT_SYMBOL(km_migrate);
+#endif
+
+int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr)
+{
+ int err = -EINVAL;
+ int ret;
+ struct xfrm_mgr *km;
+
+ rcu_read_lock();
+ list_for_each_entry_rcu(km, &xfrm_km_list, list) {
+ if (km->report) {
+ ret = km->report(net, proto, sel, addr);
+ if (!ret)
+ err = ret;
+ }
+ }
+ rcu_read_unlock();
+ return err;
+}
+EXPORT_SYMBOL(km_report);
+
+static bool km_is_alive(const struct km_event *c)
+{
+ struct xfrm_mgr *km;
+ bool is_alive = false;
+
+ rcu_read_lock();
+ list_for_each_entry_rcu(km, &xfrm_km_list, list) {
+ if (km->is_alive && km->is_alive(c)) {
+ is_alive = true;
+ break;
+ }
+ }
+ rcu_read_unlock();
+
+ return is_alive;
+}
+
+#if IS_ENABLED(CONFIG_XFRM_USER_COMPAT)
+static DEFINE_SPINLOCK(xfrm_translator_lock);
+static struct xfrm_translator __rcu *xfrm_translator;
+
+struct xfrm_translator *xfrm_get_translator(void)
+{
+ struct xfrm_translator *xtr;
+
+ rcu_read_lock();
+ xtr = rcu_dereference(xfrm_translator);
+ if (unlikely(!xtr))
+ goto out;
+ if (!try_module_get(xtr->owner))
+ xtr = NULL;
+out:
+ rcu_read_unlock();
+ return xtr;
+}
+EXPORT_SYMBOL_GPL(xfrm_get_translator);
+
+void xfrm_put_translator(struct xfrm_translator *xtr)
+{
+ module_put(xtr->owner);
+}
+EXPORT_SYMBOL_GPL(xfrm_put_translator);
+
+int xfrm_register_translator(struct xfrm_translator *xtr)
+{
+ int err = 0;
+
+ spin_lock_bh(&xfrm_translator_lock);
+ if (unlikely(xfrm_translator != NULL))
+ err = -EEXIST;
+ else
+ rcu_assign_pointer(xfrm_translator, xtr);
+ spin_unlock_bh(&xfrm_translator_lock);
+
+ return err;
+}
+EXPORT_SYMBOL_GPL(xfrm_register_translator);
+
+int xfrm_unregister_translator(struct xfrm_translator *xtr)
+{
+ int err = 0;
+
+ spin_lock_bh(&xfrm_translator_lock);
+ if (likely(xfrm_translator != NULL)) {
+ if (rcu_access_pointer(xfrm_translator) != xtr)
+ err = -EINVAL;
+ else
+ RCU_INIT_POINTER(xfrm_translator, NULL);
+ }
+ spin_unlock_bh(&xfrm_translator_lock);
+ synchronize_rcu();
+
+ return err;
+}
+EXPORT_SYMBOL_GPL(xfrm_unregister_translator);
+#endif
+
+int xfrm_user_policy(struct sock *sk, int optname, sockptr_t optval, int optlen)
+{
+ int err;
+ u8 *data;
+ struct xfrm_mgr *km;
+ struct xfrm_policy *pol = NULL;
+
+ if (sockptr_is_null(optval) && !optlen) {
+ xfrm_sk_policy_insert(sk, XFRM_POLICY_IN, NULL);
+ xfrm_sk_policy_insert(sk, XFRM_POLICY_OUT, NULL);
+ __sk_dst_reset(sk);
+ return 0;
+ }
+
+ if (optlen <= 0 || optlen > PAGE_SIZE)
+ return -EMSGSIZE;
+
+ data = memdup_sockptr(optval, optlen);
+ if (IS_ERR(data))
+ return PTR_ERR(data);
+
+ if (in_compat_syscall()) {
+ struct xfrm_translator *xtr = xfrm_get_translator();
+
+ if (!xtr) {
+ kfree(data);
+ return -EOPNOTSUPP;
+ }
+
+ err = xtr->xlate_user_policy_sockptr(&data, optlen);
+ xfrm_put_translator(xtr);
+ if (err) {
+ kfree(data);
+ return err;
+ }
+ }
+
+ err = -EINVAL;
+ rcu_read_lock();
+ list_for_each_entry_rcu(km, &xfrm_km_list, list) {
+ pol = km->compile_policy(sk, optname, data,
+ optlen, &err);
+ if (err >= 0)
+ break;
+ }
+ rcu_read_unlock();
+
+ if (err >= 0) {
+ xfrm_sk_policy_insert(sk, err, pol);
+ xfrm_pol_put(pol);
+ __sk_dst_reset(sk);
+ err = 0;
+ }
+
+ kfree(data);
+ return err;
+}
+EXPORT_SYMBOL(xfrm_user_policy);
+
+static DEFINE_SPINLOCK(xfrm_km_lock);
+
+void xfrm_register_km(struct xfrm_mgr *km)
+{
+ spin_lock_bh(&xfrm_km_lock);
+ list_add_tail_rcu(&km->list, &xfrm_km_list);
+ spin_unlock_bh(&xfrm_km_lock);
+}
+EXPORT_SYMBOL(xfrm_register_km);
+
+void xfrm_unregister_km(struct xfrm_mgr *km)
+{
+ spin_lock_bh(&xfrm_km_lock);
+ list_del_rcu(&km->list);
+ spin_unlock_bh(&xfrm_km_lock);
+ synchronize_rcu();
+}
+EXPORT_SYMBOL(xfrm_unregister_km);
+
+int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo)
+{
+ int err = 0;
+
+ if (WARN_ON(afinfo->family >= NPROTO))
+ return -EAFNOSUPPORT;
+
+ spin_lock_bh(&xfrm_state_afinfo_lock);
+ if (unlikely(xfrm_state_afinfo[afinfo->family] != NULL))
+ err = -EEXIST;
+ else
+ rcu_assign_pointer(xfrm_state_afinfo[afinfo->family], afinfo);
+ spin_unlock_bh(&xfrm_state_afinfo_lock);
+ return err;
+}
+EXPORT_SYMBOL(xfrm_state_register_afinfo);
+
+int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo)
+{
+ int err = 0, family = afinfo->family;
+
+ if (WARN_ON(family >= NPROTO))
+ return -EAFNOSUPPORT;
+
+ spin_lock_bh(&xfrm_state_afinfo_lock);
+ if (likely(xfrm_state_afinfo[afinfo->family] != NULL)) {
+ if (rcu_access_pointer(xfrm_state_afinfo[family]) != afinfo)
+ err = -EINVAL;
+ else
+ RCU_INIT_POINTER(xfrm_state_afinfo[afinfo->family], NULL);
+ }
+ spin_unlock_bh(&xfrm_state_afinfo_lock);
+ synchronize_rcu();
+ return err;
+}
+EXPORT_SYMBOL(xfrm_state_unregister_afinfo);
+
+struct xfrm_state_afinfo *xfrm_state_afinfo_get_rcu(unsigned int family)
+{
+ if (unlikely(family >= NPROTO))
+ return NULL;
+
+ return rcu_dereference(xfrm_state_afinfo[family]);
+}
+EXPORT_SYMBOL_GPL(xfrm_state_afinfo_get_rcu);
+
+struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family)
+{
+ struct xfrm_state_afinfo *afinfo;
+ if (unlikely(family >= NPROTO))
+ return NULL;
+ rcu_read_lock();
+ afinfo = rcu_dereference(xfrm_state_afinfo[family]);
+ if (unlikely(!afinfo))
+ rcu_read_unlock();
+ return afinfo;
+}
+
+void xfrm_flush_gc(void)
+{
+ flush_work(&xfrm_state_gc_work);
+}
+EXPORT_SYMBOL(xfrm_flush_gc);
+
+/* Temporarily located here until net/xfrm/xfrm_tunnel.c is created */
+void xfrm_state_delete_tunnel(struct xfrm_state *x)
+{
+ if (x->tunnel) {
+ struct xfrm_state *t = x->tunnel;
+
+ if (atomic_read(&t->tunnel_users) == 2)
+ xfrm_state_delete(t);
+ atomic_dec(&t->tunnel_users);
+ xfrm_state_put_sync(t);
+ x->tunnel = NULL;
+ }
+}
+EXPORT_SYMBOL(xfrm_state_delete_tunnel);
+
+u32 xfrm_state_mtu(struct xfrm_state *x, int mtu)
+{
+ const struct xfrm_type *type = READ_ONCE(x->type);
+ struct crypto_aead *aead;
+ u32 blksize, net_adj = 0;
+
+ if (x->km.state != XFRM_STATE_VALID ||
+ !type || type->proto != IPPROTO_ESP)
+ return mtu - x->props.header_len;
+
+ aead = x->data;
+ blksize = ALIGN(crypto_aead_blocksize(aead), 4);
+
+ switch (x->props.mode) {
+ case XFRM_MODE_TRANSPORT:
+ case XFRM_MODE_BEET:
+ if (x->props.family == AF_INET)
+ net_adj = sizeof(struct iphdr);
+ else if (x->props.family == AF_INET6)
+ net_adj = sizeof(struct ipv6hdr);
+ break;
+ case XFRM_MODE_TUNNEL:
+ break;
+ default:
+ WARN_ON_ONCE(1);
+ break;
+ }
+
+ return ((mtu - x->props.header_len - crypto_aead_authsize(aead) -
+ net_adj) & ~(blksize - 1)) + net_adj - 2;
+}
+EXPORT_SYMBOL_GPL(xfrm_state_mtu);
+
+int __xfrm_init_state(struct xfrm_state *x, bool init_replay, bool offload,
+ struct netlink_ext_ack *extack)
+{
+ const struct xfrm_mode *inner_mode;
+ const struct xfrm_mode *outer_mode;
+ int family = x->props.family;
+ int err;
+
+ if (family == AF_INET &&
+ READ_ONCE(xs_net(x)->ipv4.sysctl_ip_no_pmtu_disc))
+ x->props.flags |= XFRM_STATE_NOPMTUDISC;
+
+ err = -EPROTONOSUPPORT;
+
+ if (x->sel.family != AF_UNSPEC) {
+ inner_mode = xfrm_get_mode(x->props.mode, x->sel.family);
+ if (inner_mode == NULL) {
+ NL_SET_ERR_MSG(extack, "Requested mode not found");
+ goto error;
+ }
+
+ if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL) &&
+ family != x->sel.family) {
+ NL_SET_ERR_MSG(extack, "Only tunnel modes can accommodate a change of family");
+ goto error;
+ }
+
+ x->inner_mode = *inner_mode;
+ } else {
+ const struct xfrm_mode *inner_mode_iaf;
+ int iafamily = AF_INET;
+
+ inner_mode = xfrm_get_mode(x->props.mode, x->props.family);
+ if (inner_mode == NULL) {
+ NL_SET_ERR_MSG(extack, "Requested mode not found");
+ goto error;
+ }
+
+ x->inner_mode = *inner_mode;
+
+ if (x->props.family == AF_INET)
+ iafamily = AF_INET6;
+
+ inner_mode_iaf = xfrm_get_mode(x->props.mode, iafamily);
+ if (inner_mode_iaf) {
+ if (inner_mode_iaf->flags & XFRM_MODE_FLAG_TUNNEL)
+ x->inner_mode_iaf = *inner_mode_iaf;
+ }
+ }
+
+ x->type = xfrm_get_type(x->id.proto, family);
+ if (x->type == NULL) {
+ NL_SET_ERR_MSG(extack, "Requested type not found");
+ goto error;
+ }
+
+ x->type_offload = xfrm_get_type_offload(x->id.proto, family, offload);
+
+ err = x->type->init_state(x, extack);
+ if (err)
+ goto error;
+
+ outer_mode = xfrm_get_mode(x->props.mode, family);
+ if (!outer_mode) {
+ NL_SET_ERR_MSG(extack, "Requested mode not found");
+ err = -EPROTONOSUPPORT;
+ goto error;
+ }
+
+ x->outer_mode = *outer_mode;
+ if (init_replay) {
+ err = xfrm_init_replay(x, extack);
+ if (err)
+ goto error;
+ }
+
+error:
+ return err;
+}
+
+EXPORT_SYMBOL(__xfrm_init_state);
+
+int xfrm_init_state(struct xfrm_state *x)
+{
+ int err;
+
+ err = __xfrm_init_state(x, true, false, NULL);
+ if (!err)
+ x->km.state = XFRM_STATE_VALID;
+
+ return err;
+}
+
+EXPORT_SYMBOL(xfrm_init_state);
+
+int __net_init xfrm_state_init(struct net *net)
+{
+ unsigned int sz;
+
+ if (net_eq(net, &init_net))
+ xfrm_state_cache = KMEM_CACHE(xfrm_state,
+ SLAB_HWCACHE_ALIGN | SLAB_PANIC);
+
+ INIT_LIST_HEAD(&net->xfrm.state_all);
+
+ sz = sizeof(struct hlist_head) * 8;
+
+ net->xfrm.state_bydst = xfrm_hash_alloc(sz);
+ if (!net->xfrm.state_bydst)
+ goto out_bydst;
+ net->xfrm.state_bysrc = xfrm_hash_alloc(sz);
+ if (!net->xfrm.state_bysrc)
+ goto out_bysrc;
+ net->xfrm.state_byspi = xfrm_hash_alloc(sz);
+ if (!net->xfrm.state_byspi)
+ goto out_byspi;
+ net->xfrm.state_byseq = xfrm_hash_alloc(sz);
+ if (!net->xfrm.state_byseq)
+ goto out_byseq;
+ net->xfrm.state_hmask = ((sz / sizeof(struct hlist_head)) - 1);
+
+ net->xfrm.state_num = 0;
+ INIT_WORK(&net->xfrm.state_hash_work, xfrm_hash_resize);
+ spin_lock_init(&net->xfrm.xfrm_state_lock);
+ seqcount_spinlock_init(&net->xfrm.xfrm_state_hash_generation,
+ &net->xfrm.xfrm_state_lock);
+ return 0;
+
+out_byseq:
+ xfrm_hash_free(net->xfrm.state_byspi, sz);
+out_byspi:
+ xfrm_hash_free(net->xfrm.state_bysrc, sz);
+out_bysrc:
+ xfrm_hash_free(net->xfrm.state_bydst, sz);
+out_bydst:
+ return -ENOMEM;
+}
+
+void xfrm_state_fini(struct net *net)
+{
+ unsigned int sz;
+
+ flush_work(&net->xfrm.state_hash_work);
+ flush_work(&xfrm_state_gc_work);
+ xfrm_state_flush(net, 0, false, true);
+
+ WARN_ON(!list_empty(&net->xfrm.state_all));
+
+ sz = (net->xfrm.state_hmask + 1) * sizeof(struct hlist_head);
+ WARN_ON(!hlist_empty(net->xfrm.state_byseq));
+ xfrm_hash_free(net->xfrm.state_byseq, sz);
+ WARN_ON(!hlist_empty(net->xfrm.state_byspi));
+ xfrm_hash_free(net->xfrm.state_byspi, sz);
+ WARN_ON(!hlist_empty(net->xfrm.state_bysrc));
+ xfrm_hash_free(net->xfrm.state_bysrc, sz);
+ WARN_ON(!hlist_empty(net->xfrm.state_bydst));
+ xfrm_hash_free(net->xfrm.state_bydst, sz);
+}
+
+#ifdef CONFIG_AUDITSYSCALL
+static void xfrm_audit_helper_sainfo(struct xfrm_state *x,
+ struct audit_buffer *audit_buf)
+{
+ struct xfrm_sec_ctx *ctx = x->security;
+ u32 spi = ntohl(x->id.spi);
+
+ 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 (x->props.family) {
+ case AF_INET:
+ audit_log_format(audit_buf, " src=%pI4 dst=%pI4",
+ &x->props.saddr.a4, &x->id.daddr.a4);
+ break;
+ case AF_INET6:
+ audit_log_format(audit_buf, " src=%pI6 dst=%pI6",
+ x->props.saddr.a6, x->id.daddr.a6);
+ break;
+ }
+
+ audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi);
+}
+
+static void xfrm_audit_helper_pktinfo(struct sk_buff *skb, u16 family,
+ struct audit_buffer *audit_buf)
+{
+ const struct iphdr *iph4;
+ const struct ipv6hdr *iph6;
+
+ switch (family) {
+ case AF_INET:
+ iph4 = ip_hdr(skb);
+ audit_log_format(audit_buf, " src=%pI4 dst=%pI4",
+ &iph4->saddr, &iph4->daddr);
+ break;
+ case AF_INET6:
+ iph6 = ipv6_hdr(skb);
+ audit_log_format(audit_buf,
+ " src=%pI6 dst=%pI6 flowlbl=0x%x%02x%02x",
+ &iph6->saddr, &iph6->daddr,
+ iph6->flow_lbl[0] & 0x0f,
+ iph6->flow_lbl[1],
+ iph6->flow_lbl[2]);
+ break;
+ }
+}
+
+void xfrm_audit_state_add(struct xfrm_state *x, int result, bool task_valid)
+{
+ struct audit_buffer *audit_buf;
+
+ audit_buf = xfrm_audit_start("SAD-add");
+ if (audit_buf == NULL)
+ return;
+ xfrm_audit_helper_usrinfo(task_valid, audit_buf);
+ xfrm_audit_helper_sainfo(x, audit_buf);
+ audit_log_format(audit_buf, " res=%u", result);
+ audit_log_end(audit_buf);
+}
+EXPORT_SYMBOL_GPL(xfrm_audit_state_add);
+
+void xfrm_audit_state_delete(struct xfrm_state *x, int result, bool task_valid)
+{
+ struct audit_buffer *audit_buf;
+
+ audit_buf = xfrm_audit_start("SAD-delete");
+ if (audit_buf == NULL)
+ return;
+ xfrm_audit_helper_usrinfo(task_valid, audit_buf);
+ xfrm_audit_helper_sainfo(x, audit_buf);
+ audit_log_format(audit_buf, " res=%u", result);
+ audit_log_end(audit_buf);
+}
+EXPORT_SYMBOL_GPL(xfrm_audit_state_delete);
+
+void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
+ struct sk_buff *skb)
+{
+ struct audit_buffer *audit_buf;
+ u32 spi;
+
+ audit_buf = xfrm_audit_start("SA-replay-overflow");
+ if (audit_buf == NULL)
+ return;
+ xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf);
+ /* don't record the sequence number because it's inherent in this kind
+ * of audit message */
+ spi = ntohl(x->id.spi);
+ audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi);
+ audit_log_end(audit_buf);
+}
+EXPORT_SYMBOL_GPL(xfrm_audit_state_replay_overflow);
+
+void xfrm_audit_state_replay(struct xfrm_state *x,
+ struct sk_buff *skb, __be32 net_seq)
+{
+ struct audit_buffer *audit_buf;
+ u32 spi;
+
+ audit_buf = xfrm_audit_start("SA-replayed-pkt");
+ if (audit_buf == NULL)
+ return;
+ xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf);
+ spi = ntohl(x->id.spi);
+ audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u",
+ spi, spi, ntohl(net_seq));
+ audit_log_end(audit_buf);
+}
+EXPORT_SYMBOL_GPL(xfrm_audit_state_replay);
+
+void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family)
+{
+ struct audit_buffer *audit_buf;
+
+ audit_buf = xfrm_audit_start("SA-notfound");
+ if (audit_buf == NULL)
+ return;
+ xfrm_audit_helper_pktinfo(skb, family, audit_buf);
+ audit_log_end(audit_buf);
+}
+EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound_simple);
+
+void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family,
+ __be32 net_spi, __be32 net_seq)
+{
+ struct audit_buffer *audit_buf;
+ u32 spi;
+
+ audit_buf = xfrm_audit_start("SA-notfound");
+ if (audit_buf == NULL)
+ return;
+ xfrm_audit_helper_pktinfo(skb, family, audit_buf);
+ spi = ntohl(net_spi);
+ audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u",
+ spi, spi, ntohl(net_seq));
+ audit_log_end(audit_buf);
+}
+EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound);
+
+void xfrm_audit_state_icvfail(struct xfrm_state *x,
+ struct sk_buff *skb, u8 proto)
+{
+ struct audit_buffer *audit_buf;
+ __be32 net_spi;
+ __be32 net_seq;
+
+ audit_buf = xfrm_audit_start("SA-icv-failure");
+ if (audit_buf == NULL)
+ return;
+ xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf);
+ if (xfrm_parse_spi(skb, proto, &net_spi, &net_seq) == 0) {
+ u32 spi = ntohl(net_spi);
+ audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u",
+ spi, spi, ntohl(net_seq));
+ }
+ audit_log_end(audit_buf);
+}
+EXPORT_SYMBOL_GPL(xfrm_audit_state_icvfail);
+#endif /* CONFIG_AUDITSYSCALL */