-/*
+/*
* xfrm_policy.c
*
* Changes:
*
*/
+#include <linux/err.h>
#include <linux/slab.h>
#include <linux/kmod.h>
#include <linux/list.h>
#include <linux/netfilter.h>
#include <linux/module.h>
#include <linux/cache.h>
+#include <linux/audit.h>
+#include <net/dst.h>
#include <net/xfrm.h>
#include <net/ip.h>
+#ifdef CONFIG_XFRM_STATISTICS
+#include <net/snmp.h>
+#endif
#include "xfrm_hash.h"
+int sysctl_xfrm_larval_drop __read_mostly;
+
+#ifdef CONFIG_XFRM_STATISTICS
+DEFINE_SNMP_STAT(struct linux_xfrm_mib, xfrm_statistics) __read_mostly;
+EXPORT_SYMBOL(xfrm_statistics);
+#endif
+
DEFINE_MUTEX(xfrm_cfg_mutex);
EXPORT_SYMBOL(xfrm_cfg_mutex);
static DEFINE_RWLOCK(xfrm_policy_afinfo_lock);
static struct xfrm_policy_afinfo *xfrm_policy_afinfo[NPROTO];
-static kmem_cache_t *xfrm_dst_cache __read_mostly;
+static struct kmem_cache *xfrm_dst_cache __read_mostly;
static struct work_struct xfrm_policy_gc_work;
static HLIST_HEAD(xfrm_policy_gc_list);
static struct xfrm_policy_afinfo *xfrm_policy_get_afinfo(unsigned short family);
static void xfrm_policy_put_afinfo(struct xfrm_policy_afinfo *afinfo);
-static struct xfrm_policy_afinfo *xfrm_policy_lock_afinfo(unsigned int family);
-static void xfrm_policy_unlock_afinfo(struct xfrm_policy_afinfo *afinfo);
+static void xfrm_init_pmtu(struct dst_entry *dst);
-int xfrm_register_type(struct xfrm_type *type, unsigned short family)
+static inline int
+__xfrm4_selector_match(struct xfrm_selector *sel, struct flowi *fl)
{
- struct xfrm_policy_afinfo *afinfo = xfrm_policy_lock_afinfo(family);
- struct xfrm_type **typemap;
- int err = 0;
-
- if (unlikely(afinfo == NULL))
- return -EAFNOSUPPORT;
- typemap = afinfo->type_map;
-
- if (likely(typemap[type->proto] == NULL))
- typemap[type->proto] = type;
- else
- err = -EEXIST;
- xfrm_policy_unlock_afinfo(afinfo);
- return err;
+ return addr_match(&fl->fl4_dst, &sel->daddr, sel->prefixlen_d) &&
+ addr_match(&fl->fl4_src, &sel->saddr, sel->prefixlen_s) &&
+ !((xfrm_flowi_dport(fl) ^ sel->dport) & sel->dport_mask) &&
+ !((xfrm_flowi_sport(fl) ^ sel->sport) & sel->sport_mask) &&
+ (fl->proto == sel->proto || !sel->proto) &&
+ (fl->oif == sel->ifindex || !sel->ifindex);
}
-EXPORT_SYMBOL(xfrm_register_type);
-
-int xfrm_unregister_type(struct xfrm_type *type, unsigned short family)
-{
- struct xfrm_policy_afinfo *afinfo = xfrm_policy_lock_afinfo(family);
- struct xfrm_type **typemap;
- int err = 0;
- if (unlikely(afinfo == NULL))
- return -EAFNOSUPPORT;
- typemap = afinfo->type_map;
-
- if (unlikely(typemap[type->proto] != type))
- err = -ENOENT;
- else
- typemap[type->proto] = NULL;
- xfrm_policy_unlock_afinfo(afinfo);
- return err;
-}
-EXPORT_SYMBOL(xfrm_unregister_type);
-
-struct xfrm_type *xfrm_get_type(u8 proto, unsigned short family)
+static inline int
+__xfrm6_selector_match(struct xfrm_selector *sel, struct flowi *fl)
{
- struct xfrm_policy_afinfo *afinfo;
- struct xfrm_type **typemap;
- struct xfrm_type *type;
- int modload_attempted = 0;
-
-retry:
- afinfo = xfrm_policy_get_afinfo(family);
- if (unlikely(afinfo == NULL))
- return NULL;
- typemap = afinfo->type_map;
-
- type = typemap[proto];
- if (unlikely(type && !try_module_get(type->owner)))
- type = NULL;
- if (!type && !modload_attempted) {
- xfrm_policy_put_afinfo(afinfo);
- request_module("xfrm-type-%d-%d",
- (int) family, (int) proto);
- modload_attempted = 1;
- goto retry;
- }
-
- xfrm_policy_put_afinfo(afinfo);
- return type;
+ return addr_match(&fl->fl6_dst, &sel->daddr, sel->prefixlen_d) &&
+ addr_match(&fl->fl6_src, &sel->saddr, sel->prefixlen_s) &&
+ !((xfrm_flowi_dport(fl) ^ sel->dport) & sel->dport_mask) &&
+ !((xfrm_flowi_sport(fl) ^ sel->sport) & sel->sport_mask) &&
+ (fl->proto == sel->proto || !sel->proto) &&
+ (fl->oif == sel->ifindex || !sel->ifindex);
}
-int xfrm_dst_lookup(struct xfrm_dst **dst, struct flowi *fl,
+int xfrm_selector_match(struct xfrm_selector *sel, struct flowi *fl,
unsigned short family)
{
- struct xfrm_policy_afinfo *afinfo = xfrm_policy_get_afinfo(family);
- int err = 0;
-
- if (unlikely(afinfo == NULL))
- return -EAFNOSUPPORT;
-
- if (likely(afinfo->dst_lookup != NULL))
- err = afinfo->dst_lookup(dst, fl);
- else
- err = -EINVAL;
- xfrm_policy_put_afinfo(afinfo);
- return err;
-}
-EXPORT_SYMBOL(xfrm_dst_lookup);
-
-void xfrm_put_type(struct xfrm_type *type)
-{
- module_put(type->owner);
-}
-
-int xfrm_register_mode(struct xfrm_mode *mode, int family)
-{
- struct xfrm_policy_afinfo *afinfo;
- struct xfrm_mode **modemap;
- int err;
-
- if (unlikely(mode->encap >= XFRM_MODE_MAX))
- return -EINVAL;
-
- afinfo = xfrm_policy_lock_afinfo(family);
- if (unlikely(afinfo == NULL))
- return -EAFNOSUPPORT;
-
- err = -EEXIST;
- modemap = afinfo->mode_map;
- if (likely(modemap[mode->encap] == NULL)) {
- modemap[mode->encap] = mode;
- err = 0;
+ switch (family) {
+ case AF_INET:
+ return __xfrm4_selector_match(sel, fl);
+ case AF_INET6:
+ return __xfrm6_selector_match(sel, fl);
}
-
- xfrm_policy_unlock_afinfo(afinfo);
- return err;
-}
-EXPORT_SYMBOL(xfrm_register_mode);
-
-int xfrm_unregister_mode(struct xfrm_mode *mode, int family)
-{
- struct xfrm_policy_afinfo *afinfo;
- struct xfrm_mode **modemap;
- int err;
-
- if (unlikely(mode->encap >= XFRM_MODE_MAX))
- return -EINVAL;
-
- afinfo = xfrm_policy_lock_afinfo(family);
- if (unlikely(afinfo == NULL))
- return -EAFNOSUPPORT;
-
- err = -ENOENT;
- modemap = afinfo->mode_map;
- if (likely(modemap[mode->encap] == mode)) {
- modemap[mode->encap] = NULL;
- err = 0;
- }
-
- xfrm_policy_unlock_afinfo(afinfo);
- return err;
+ return 0;
}
-EXPORT_SYMBOL(xfrm_unregister_mode);
-struct xfrm_mode *xfrm_get_mode(unsigned int encap, int family)
+static inline struct dst_entry *xfrm_dst_lookup(struct xfrm_state *x, int tos,
+ int family)
{
+ xfrm_address_t *saddr = &x->props.saddr;
+ xfrm_address_t *daddr = &x->id.daddr;
struct xfrm_policy_afinfo *afinfo;
- struct xfrm_mode *mode;
- int modload_attempted = 0;
+ struct dst_entry *dst;
- if (unlikely(encap >= XFRM_MODE_MAX))
- return NULL;
+ if (x->type->flags & XFRM_TYPE_LOCAL_COADDR)
+ saddr = x->coaddr;
+ if (x->type->flags & XFRM_TYPE_REMOTE_COADDR)
+ daddr = x->coaddr;
-retry:
afinfo = xfrm_policy_get_afinfo(family);
if (unlikely(afinfo == NULL))
- return NULL;
-
- mode = afinfo->mode_map[encap];
- if (unlikely(mode && !try_module_get(mode->owner)))
- mode = NULL;
- if (!mode && !modload_attempted) {
- xfrm_policy_put_afinfo(afinfo);
- request_module("xfrm-mode-%d-%d", family, encap);
- modload_attempted = 1;
- goto retry;
- }
+ return ERR_PTR(-EAFNOSUPPORT);
+ dst = afinfo->dst_lookup(tos, saddr, daddr);
xfrm_policy_put_afinfo(afinfo);
- return mode;
-}
-
-void xfrm_put_mode(struct xfrm_mode *mode)
-{
- module_put(mode->owner);
+ return dst;
}
static inline unsigned long make_jiffies(long secs)
if (secs >= (MAX_SCHEDULE_TIMEOUT-1)/HZ)
return MAX_SCHEDULE_TIMEOUT-1;
else
- return secs*HZ;
+ return secs*HZ;
}
static void xfrm_policy_timer(unsigned long data)
{
struct xfrm_policy *xp = (struct xfrm_policy*)data;
- unsigned long now = (unsigned long)xtime.tv_sec;
+ unsigned long now = get_seconds();
long next = LONG_MAX;
int warn = 0;
int dir;
INIT_HLIST_NODE(&policy->byidx);
rwlock_init(&policy->lock);
atomic_set(&policy->refcnt, 1);
- init_timer(&policy->timer);
- policy->timer.data = (unsigned long)policy;
- policy->timer.function = xfrm_policy_timer;
+ setup_timer(&policy->timer, xfrm_policy_timer,
+ (unsigned long)policy);
}
return policy;
}
xfrm_pol_put(policy);
}
-static void xfrm_policy_gc_task(void *data)
+static void xfrm_policy_gc_task(struct work_struct *work)
{
struct xfrm_policy *policy;
struct hlist_node *entry, *tmp;
return 0;
}
-static DEFINE_MUTEX(hash_resize_mutex);
+void xfrm_spd_getinfo(struct xfrmk_spdinfo *si)
+{
+ read_lock_bh(&xfrm_policy_lock);
+ si->incnt = xfrm_policy_count[XFRM_POLICY_IN];
+ si->outcnt = xfrm_policy_count[XFRM_POLICY_OUT];
+ si->fwdcnt = xfrm_policy_count[XFRM_POLICY_FWD];
+ si->inscnt = xfrm_policy_count[XFRM_POLICY_IN+XFRM_POLICY_MAX];
+ si->outscnt = xfrm_policy_count[XFRM_POLICY_OUT+XFRM_POLICY_MAX];
+ si->fwdscnt = xfrm_policy_count[XFRM_POLICY_FWD+XFRM_POLICY_MAX];
+ si->spdhcnt = xfrm_idx_hmask;
+ si->spdhmcnt = xfrm_policy_hashmax;
+ read_unlock_bh(&xfrm_policy_lock);
+}
+EXPORT_SYMBOL(xfrm_spd_getinfo);
-static void xfrm_hash_resize(void *__unused)
+static DEFINE_MUTEX(hash_resize_mutex);
+static void xfrm_hash_resize(struct work_struct *__unused)
{
int dir, total;
mutex_unlock(&hash_resize_mutex);
}
-static DECLARE_WORK(xfrm_hash_work, xfrm_hash_resize, NULL);
+static DECLARE_WORK(xfrm_hash_work, xfrm_hash_resize);
/* Generate new index... KAME seems to generate them ordered by cost
* of an absolute inpredictability of ordering of rules. This will not pass. */
struct xfrm_policy *pol;
struct xfrm_policy *delpol;
struct hlist_head *chain;
- struct hlist_node *entry, *newpos, *last;
+ struct hlist_node *entry, *newpos;
struct dst_entry *gc_list;
write_lock_bh(&xfrm_policy_lock);
chain = policy_hash_bysel(&policy->selector, policy->family, dir);
delpol = NULL;
newpos = NULL;
- last = NULL;
hlist_for_each_entry(pol, entry, chain, bydst) {
- if (!delpol &&
- pol->type == policy->type &&
+ if (pol->type == policy->type &&
!selector_cmp(&pol->selector, &policy->selector) &&
- xfrm_sec_ctx_match(pol->security, policy->security)) {
+ xfrm_sec_ctx_match(pol->security, policy->security) &&
+ !WARN_ON(delpol)) {
if (excl) {
write_unlock_bh(&xfrm_policy_lock);
return -EEXIST;
if (policy->priority > pol->priority)
continue;
} else if (policy->priority >= pol->priority) {
- last = &pol->bydst;
+ newpos = &pol->bydst;
continue;
}
- if (!newpos)
- newpos = &pol->bydst;
if (delpol)
break;
- last = &pol->bydst;
}
- if (!newpos)
- newpos = last;
if (newpos)
hlist_add_after(newpos, &policy->bydst);
else
}
policy->index = delpol ? delpol->index : xfrm_gen_index(policy->type, dir);
hlist_add_head(&policy->byidx, xfrm_policy_byidx+idx_hash(policy->index));
- policy->curlft.add_time = (unsigned long)xtime.tv_sec;
+ policy->curlft.add_time = get_seconds();
policy->curlft.use_time = 0;
if (!mod_timer(&policy->timer, jiffies + HZ))
xfrm_pol_hold(policy);
struct xfrm_policy *xfrm_policy_bysel_ctx(u8 type, int dir,
struct xfrm_selector *sel,
- struct xfrm_sec_ctx *ctx, int delete)
+ struct xfrm_sec_ctx *ctx, int delete,
+ int *err)
{
struct xfrm_policy *pol, *ret;
struct hlist_head *chain;
struct hlist_node *entry;
+ *err = 0;
write_lock_bh(&xfrm_policy_lock);
chain = policy_hash_bysel(sel, sel->family, dir);
ret = NULL;
xfrm_sec_ctx_match(ctx, pol->security)) {
xfrm_pol_hold(pol);
if (delete) {
+ *err = security_xfrm_policy_delete(pol);
+ if (*err) {
+ write_unlock_bh(&xfrm_policy_lock);
+ return pol;
+ }
hlist_del(&pol->bydst);
hlist_del(&pol->byidx);
xfrm_policy_count[dir]--;
}
EXPORT_SYMBOL(xfrm_policy_bysel_ctx);
-struct xfrm_policy *xfrm_policy_byid(u8 type, int dir, u32 id, int delete)
+struct xfrm_policy *xfrm_policy_byid(u8 type, int dir, u32 id, int delete,
+ int *err)
{
struct xfrm_policy *pol, *ret;
struct hlist_head *chain;
struct hlist_node *entry;
+ *err = -ENOENT;
+ if (xfrm_policy_id2dir(id) != dir)
+ return NULL;
+
+ *err = 0;
write_lock_bh(&xfrm_policy_lock);
chain = xfrm_policy_byidx + idx_hash(id);
ret = NULL;
if (pol->type == type && pol->index == id) {
xfrm_pol_hold(pol);
if (delete) {
+ *err = security_xfrm_policy_delete(pol);
+ if (*err) {
+ write_unlock_bh(&xfrm_policy_lock);
+ return pol;
+ }
hlist_del(&pol->bydst);
hlist_del(&pol->byidx);
xfrm_policy_count[dir]--;
}
EXPORT_SYMBOL(xfrm_policy_byid);
-void xfrm_policy_flush(u8 type)
+#ifdef CONFIG_SECURITY_NETWORK_XFRM
+static inline int
+xfrm_policy_flush_secctx_check(u8 type, struct xfrm_audit *audit_info)
{
- int dir;
+ int dir, err = 0;
- write_lock_bh(&xfrm_policy_lock);
for (dir = 0; dir < XFRM_POLICY_MAX; dir++) {
struct xfrm_policy *pol;
struct hlist_node *entry;
int i;
+ hlist_for_each_entry(pol, entry,
+ &xfrm_policy_inexact[dir], bydst) {
+ if (pol->type != type)
+ continue;
+ err = security_xfrm_policy_delete(pol);
+ if (err) {
+ xfrm_audit_policy_delete(pol, 0,
+ audit_info->loginuid,
+ audit_info->secid);
+ return err;
+ }
+ }
+ for (i = xfrm_policy_bydst[dir].hmask; i >= 0; i--) {
+ hlist_for_each_entry(pol, entry,
+ xfrm_policy_bydst[dir].table + i,
+ bydst) {
+ if (pol->type != type)
+ continue;
+ err = security_xfrm_policy_delete(pol);
+ if (err) {
+ xfrm_audit_policy_delete(pol, 0,
+ audit_info->loginuid,
+ audit_info->secid);
+ return err;
+ }
+ }
+ }
+ }
+ return err;
+}
+#else
+static inline int
+xfrm_policy_flush_secctx_check(u8 type, struct xfrm_audit *audit_info)
+{
+ return 0;
+}
+#endif
+
+int xfrm_policy_flush(u8 type, struct xfrm_audit *audit_info)
+{
+ int dir, err = 0;
+
+ write_lock_bh(&xfrm_policy_lock);
+
+ err = xfrm_policy_flush_secctx_check(type, audit_info);
+ if (err)
+ goto out;
+
+ for (dir = 0; dir < XFRM_POLICY_MAX; dir++) {
+ struct xfrm_policy *pol;
+ struct hlist_node *entry;
+ int i, killed;
+
+ killed = 0;
again1:
hlist_for_each_entry(pol, entry,
&xfrm_policy_inexact[dir], bydst) {
hlist_del(&pol->byidx);
write_unlock_bh(&xfrm_policy_lock);
+ xfrm_audit_policy_delete(pol, 1, audit_info->loginuid,
+ audit_info->secid);
+
xfrm_policy_kill(pol);
+ killed++;
write_lock_bh(&xfrm_policy_lock);
goto again1;
hlist_del(&pol->byidx);
write_unlock_bh(&xfrm_policy_lock);
+ xfrm_audit_policy_delete(pol, 1,
+ audit_info->loginuid,
+ audit_info->secid);
xfrm_policy_kill(pol);
+ killed++;
write_lock_bh(&xfrm_policy_lock);
goto again2;
}
}
- xfrm_policy_count[dir] = 0;
+ xfrm_policy_count[dir] -= killed;
}
atomic_inc(&flow_cache_genid);
+out:
write_unlock_bh(&xfrm_policy_lock);
+ return err;
}
EXPORT_SYMBOL(xfrm_policy_flush);
int xfrm_policy_walk(u8 type, int (*func)(struct xfrm_policy *, int, int, void*),
void *data)
{
- struct xfrm_policy *pol;
+ struct xfrm_policy *pol, *last = NULL;
struct hlist_node *entry;
- int dir, count, error;
+ int dir, last_dir = 0, count, error;
read_lock_bh(&xfrm_policy_lock);
count = 0;
- for (dir = 0; dir < 2*XFRM_POLICY_MAX; dir++) {
- struct hlist_head *table = xfrm_policy_bydst[dir].table;
- int i;
-
- hlist_for_each_entry(pol, entry,
- &xfrm_policy_inexact[dir], bydst) {
- if (pol->type == type)
- count++;
- }
- for (i = xfrm_policy_bydst[dir].hmask; i >= 0; i--) {
- hlist_for_each_entry(pol, entry, table + i, bydst) {
- if (pol->type == type)
- count++;
- }
- }
- }
-
- if (count == 0) {
- error = -ENOENT;
- goto out;
- }
for (dir = 0; dir < 2*XFRM_POLICY_MAX; dir++) {
struct hlist_head *table = xfrm_policy_bydst[dir].table;
&xfrm_policy_inexact[dir], bydst) {
if (pol->type != type)
continue;
- error = func(pol, dir % XFRM_POLICY_MAX, --count, data);
- if (error)
- goto out;
+ if (last) {
+ error = func(last, last_dir % XFRM_POLICY_MAX,
+ count, data);
+ if (error)
+ goto out;
+ }
+ last = pol;
+ last_dir = dir;
+ count++;
}
for (i = xfrm_policy_bydst[dir].hmask; i >= 0; i--) {
hlist_for_each_entry(pol, entry, table + i, bydst) {
if (pol->type != type)
continue;
- error = func(pol, dir % XFRM_POLICY_MAX, --count, data);
- if (error)
- goto out;
+ if (last) {
+ error = func(last, last_dir % XFRM_POLICY_MAX,
+ count, data);
+ if (error)
+ goto out;
+ }
+ last = pol;
+ last_dir = dir;
+ count++;
}
}
}
- error = 0;
+ if (count == 0) {
+ error = -ENOENT;
+ goto out;
+ }
+ error = func(last, last_dir % XFRM_POLICY_MAX, 0, data);
out:
read_unlock_bh(&xfrm_policy_lock);
return error;
}
EXPORT_SYMBOL(xfrm_policy_walk);
-/* Find policy to apply to this flow. */
-
+/*
+ * Find policy to apply to this flow.
+ *
+ * Returns 0 if policy found, else an -errno.
+ */
static int xfrm_policy_match(struct xfrm_policy *pol, struct flowi *fl,
u8 type, u16 family, int dir)
{
struct xfrm_selector *sel = &pol->selector;
- int match;
+ int match, ret = -ESRCH;
if (pol->family != family ||
pol->type != type)
- return 0;
+ return ret;
match = xfrm_selector_match(sel, fl, family);
- if (match) {
- if (!security_xfrm_policy_lookup(pol, fl->secid, dir))
- return 1;
- }
+ if (match)
+ ret = security_xfrm_policy_lookup(pol, fl->secid, dir);
- return 0;
+ return ret;
}
static struct xfrm_policy *xfrm_policy_lookup_bytype(u8 type, struct flowi *fl,
u16 family, u8 dir)
{
+ int err;
struct xfrm_policy *pol, *ret;
xfrm_address_t *daddr, *saddr;
struct hlist_node *entry;
chain = policy_hash_direct(daddr, saddr, family, dir);
ret = NULL;
hlist_for_each_entry(pol, entry, chain, bydst) {
- if (xfrm_policy_match(pol, fl, type, family, dir)) {
+ 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 = &xfrm_policy_inexact[dir];
hlist_for_each_entry(pol, entry, chain, bydst) {
- if (xfrm_policy_match(pol, fl, type, family, dir) &&
- pol->priority < priority) {
+ err = xfrm_policy_match(pol, fl, type, family, dir);
+ if (err) {
+ if (err == -ESRCH)
+ continue;
+ else {
+ ret = ERR_PTR(err);
+ goto fail;
+ }
+ } else if (pol->priority < priority) {
ret = pol;
break;
}
}
if (ret)
xfrm_pol_hold(ret);
+fail:
read_unlock_bh(&xfrm_policy_lock);
return ret;
}
-static void xfrm_policy_lookup(struct flowi *fl, u16 family, u8 dir,
+static int xfrm_policy_lookup(struct flowi *fl, u16 family, u8 dir,
void **objp, atomic_t **obj_refp)
{
struct xfrm_policy *pol;
+ int err = 0;
#ifdef CONFIG_XFRM_SUB_POLICY
pol = xfrm_policy_lookup_bytype(XFRM_POLICY_TYPE_SUB, fl, family, dir);
- if (pol)
+ if (IS_ERR(pol)) {
+ err = PTR_ERR(pol);
+ pol = NULL;
+ }
+ if (pol || err)
goto end;
#endif
pol = xfrm_policy_lookup_bytype(XFRM_POLICY_TYPE_MAIN, fl, family, dir);
-
+ if (IS_ERR(pol)) {
+ err = PTR_ERR(pol);
+ pol = NULL;
+ }
#ifdef CONFIG_XFRM_SUB_POLICY
end:
#endif
if ((*objp = (void *) pol) != NULL)
*obj_refp = &pol->refcnt;
+ return err;
}
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;
- };
+ 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;
+ }
}
static struct xfrm_policy *xfrm_sk_policy_lookup(struct sock *sk, int dir, struct flowi *fl)
read_lock_bh(&xfrm_policy_lock);
if ((pol = sk->sk_policy[dir]) != NULL) {
- int match = xfrm_selector_match(&pol->selector, fl,
+ int match = xfrm_selector_match(&pol->selector, fl,
sk->sk_family);
- int err = 0;
-
- if (match)
- err = security_xfrm_policy_lookup(pol, fl->secid, policy_to_flow_dir(dir));
-
- if (match && !err)
- xfrm_pol_hold(pol);
- else
+ int err = 0;
+
+ if (match) {
+ err = security_xfrm_policy_lookup(pol, fl->secid,
+ policy_to_flow_dir(dir));
+ if (!err)
+ xfrm_pol_hold(pol);
+ else if (err == -ESRCH)
+ pol = NULL;
+ else
+ pol = ERR_PTR(err);
+ } else
pol = NULL;
}
read_unlock_bh(&xfrm_policy_lock);
old_pol = sk->sk_policy[dir];
sk->sk_policy[dir] = pol;
if (pol) {
- pol->curlft.add_time = (unsigned long)xtime.tv_sec;
+ pol->curlft.add_time = get_seconds();
pol->index = xfrm_gen_index(pol->type, XFRM_POLICY_MAX+dir);
__xfrm_policy_link(pol, XFRM_POLICY_MAX+dir);
}
xfrm_address_t *local = saddr;
struct xfrm_tmpl *tmpl = &policy->xfrm_vec[i];
- if (tmpl->mode == XFRM_MODE_TUNNEL) {
+ if (tmpl->mode == XFRM_MODE_TUNNEL ||
+ tmpl->mode == XFRM_MODE_BEET) {
remote = &tmpl->id.daddr;
local = &tmpl->saddr;
+ family = tmpl->encap_family;
if (xfrm_addr_any(local, family)) {
error = xfrm_get_saddr(&tmp, remote, family);
if (error)
return x;
}
-/* Allocate chain of dst_entry's, attach known xfrm's, calculate
- * all the metrics... Shortly, bundle a bundle.
- */
+static inline int xfrm_get_tos(struct flowi *fl, int family)
+{
+ struct xfrm_policy_afinfo *afinfo = xfrm_policy_get_afinfo(family);
+ int tos;
-static int
-xfrm_bundle_create(struct xfrm_policy *policy, struct xfrm_state **xfrm, int nx,
- struct flowi *fl, struct dst_entry **dst_p,
- unsigned short family)
+ if (!afinfo)
+ return -EINVAL;
+
+ tos = afinfo->get_tos(fl);
+
+ xfrm_policy_put_afinfo(afinfo);
+
+ return tos;
+}
+
+static inline struct xfrm_dst *xfrm_alloc_dst(int family)
{
- int err;
struct xfrm_policy_afinfo *afinfo = xfrm_policy_get_afinfo(family);
- if (unlikely(afinfo == NULL))
+ struct xfrm_dst *xdst;
+
+ if (!afinfo)
+ return ERR_PTR(-EINVAL);
+
+ xdst = dst_alloc(afinfo->dst_ops) ?: ERR_PTR(-ENOBUFS);
+
+ xfrm_policy_put_afinfo(afinfo);
+
+ return xdst;
+}
+
+static inline int xfrm_init_path(struct xfrm_dst *path, struct dst_entry *dst,
+ int nfheader_len)
+{
+ 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);
+
+ xfrm_policy_put_afinfo(afinfo);
+
+ return err;
+}
+
+static inline int xfrm_fill_dst(struct xfrm_dst *xdst, struct net_device *dev)
+{
+ struct xfrm_policy_afinfo *afinfo =
+ xfrm_policy_get_afinfo(xdst->u.dst.ops->family);
+ int err;
+
+ if (!afinfo)
return -EINVAL;
- err = afinfo->bundle_create(policy, xfrm, nx, fl, dst_p);
+
+ err = afinfo->fill_dst(xdst, dev);
+
xfrm_policy_put_afinfo(afinfo);
+
return err;
}
+/* 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,
+ struct flowi *fl,
+ struct dst_entry *dst)
+{
+ unsigned long now = jiffies;
+ struct net_device *dev;
+ 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;
+
+ tos = xfrm_get_tos(fl, family);
+ err = tos;
+ if (tos < 0)
+ goto put_states;
+
+ dst_hold(dst);
+
+ for (; i < nx; i++) {
+ struct xfrm_dst *xdst = xfrm_alloc_dst(family);
+ struct dst_entry *dst1 = &xdst->u.dst;
+
+ err = PTR_ERR(xdst);
+ if (IS_ERR(xdst)) {
+ dst_release(dst);
+ goto put_states;
+ }
+
+ if (!dst_prev)
+ dst0 = dst1;
+ else {
+ dst_prev->child = dst_clone(dst1);
+ dst1->flags |= DST_NOHASH;
+ }
+
+ xdst->route = dst;
+ memcpy(&dst1->metrics, &dst->metrics, sizeof(dst->metrics));
+
+ if (xfrm[i]->props.mode != XFRM_MODE_TRANSPORT) {
+ family = xfrm[i]->props.family;
+ dst = xfrm_dst_lookup(xfrm[i], tos, family);
+ err = PTR_ERR(dst);
+ if (IS_ERR(dst))
+ goto put_states;
+ } else
+ dst_hold(dst);
+
+ dst1->xfrm = xfrm[i];
+ xdst->genid = xfrm[i]->genid;
+
+ dst1->obsolete = -1;
+ dst1->flags |= DST_HOST;
+ dst1->lastuse = now;
+
+ dst1->input = dst_discard;
+ dst1->output = xfrm[i]->outer_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;
+
+ /* Copy neighbout for reachability confirmation */
+ dst0->neighbour = neigh_clone(dst->neighbour);
+
+ 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);
+ 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;
+}
+
+static int inline
+xfrm_dst_alloc_copy(void **target, void *src, int size)
+{
+ if (!*target) {
+ *target = kmalloc(size, GFP_ATOMIC);
+ if (!*target)
+ return -ENOMEM;
+ }
+ memcpy(*target, src, size);
+ return 0;
+}
+
+static int inline
+xfrm_dst_update_parent(struct dst_entry *dst, 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
+}
+
+static int inline
+xfrm_dst_update_origin(struct dst_entry *dst, 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
+}
static int stale_bundle(struct dst_entry *dst);
* At the moment we eat a raw IP route. Mostly to speed up lookups
* on interfaces with disabled IPsec.
*/
-int xfrm_lookup(struct dst_entry **dst_p, struct flowi *fl,
- struct sock *sk, int flags)
+int __xfrm_lookup(struct dst_entry **dst_p, struct flowi *fl,
+ struct sock *sk, int flags)
{
struct xfrm_policy *policy;
struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX];
pol_dead = 0;
xfrm_nr = 0;
- if (sk && sk->sk_policy[1])
+ if (sk && sk->sk_policy[XFRM_POLICY_OUT]) {
policy = xfrm_sk_policy_lookup(sk, XFRM_POLICY_OUT, fl);
+ err = PTR_ERR(policy);
+ if (IS_ERR(policy)) {
+ XFRM_INC_STATS(LINUX_MIB_XFRMOUTPOLERROR);
+ goto dropdst;
+ }
+ }
if (!policy) {
/* To accelerate a bit... */
if ((dst_orig->flags & DST_NOXFRM) ||
!xfrm_policy_count[XFRM_POLICY_OUT])
- return 0;
+ goto nopol;
policy = flow_cache_lookup(fl, dst_orig->ops->family,
dir, xfrm_policy_lookup);
+ err = PTR_ERR(policy);
+ if (IS_ERR(policy))
+ goto dropdst;
}
if (!policy)
- return 0;
+ goto nopol;
family = dst_orig->ops->family;
- policy->curlft.use_time = (unsigned long)xtime.tv_sec;
pols[0] = policy;
npols ++;
xfrm_nr += pols[0]->xfrm_nr;
+ err = -ENOENT;
+ if ((flags & XFRM_LOOKUP_ICMP) && !(policy->flags & XFRM_POLICY_ICMP))
+ goto error;
+
+ policy->curlft.use_time = get_seconds();
+
switch (policy->action) {
+ default:
case XFRM_POLICY_BLOCK:
/* Prohibit the flow */
+ XFRM_INC_STATS(LINUX_MIB_XFRMOUTPOLBLOCK);
err = -EPERM;
goto error;
*/
dst = xfrm_find_bundle(fl, policy, family);
if (IS_ERR(dst)) {
+ XFRM_INC_STATS(LINUX_MIB_XFRMOUTBUNDLECHECKERROR);
err = PTR_ERR(dst);
goto error;
}
fl, family,
XFRM_POLICY_OUT);
if (pols[1]) {
+ if (IS_ERR(pols[1])) {
+ XFRM_INC_STATS(LINUX_MIB_XFRMOUTPOLERROR);
+ err = PTR_ERR(pols[1]);
+ goto error;
+ }
if (pols[1]->action == XFRM_POLICY_BLOCK) {
+ XFRM_INC_STATS(LINUX_MIB_XFRMOUTPOLBLOCK);
err = -EPERM;
goto error;
}
if (unlikely(nx<0)) {
err = nx;
- if (err == -EAGAIN && flags) {
+ if (err == -EAGAIN && sysctl_xfrm_larval_drop) {
+ /* EREMOTE tells the caller to generate
+ * a one-shot blackhole route.
+ */
+ xfrm_pol_put(policy);
+ return -EREMOTE;
+ }
+ if (err == -EAGAIN && (flags & XFRM_LOOKUP_WAIT)) {
DECLARE_WAITQUEUE(wait, current);
add_wait_queue(&km_waitq, &wait);
nx = xfrm_tmpl_resolve(pols, npols, fl, xfrm, family);
if (nx == -EAGAIN && signal_pending(current)) {
+ XFRM_INC_STATS(LINUX_MIB_XFRMOUTNOSTATES);
err = -ERESTART;
goto error;
}
}
err = nx;
}
- if (err < 0)
+ if (err < 0) {
+ XFRM_INC_STATS(LINUX_MIB_XFRMOUTNOSTATES);
goto error;
+ }
}
if (nx == 0) {
/* Flow passes not transformed. */
return 0;
}
- dst = dst_orig;
- err = xfrm_bundle_create(policy, xfrm, nx, fl, &dst, family);
-
- if (unlikely(err)) {
- int i;
- for (i=0; i<nx; i++)
- xfrm_state_put(xfrm[i]);
+ dst = xfrm_bundle_create(policy, xfrm, nx, fl, dst_orig);
+ err = PTR_ERR(dst);
+ if (IS_ERR(dst)) {
+ XFRM_INC_STATS(LINUX_MIB_XFRMOUTBUNDLEGENERROR);
goto error;
}
if (dst)
dst_free(dst);
+ if (pol_dead)
+ XFRM_INC_STATS(LINUX_MIB_XFRMOUTPOLDEAD);
+ else
+ XFRM_INC_STATS(LINUX_MIB_XFRMOUTBUNDLECHECKERROR);
err = -EHOSTUNREACH;
goto error;
}
+
+ if (npols > 1)
+ err = xfrm_dst_update_parent(dst, &pols[1]->selector);
+ else
+ err = xfrm_dst_update_origin(dst, fl);
+ if (unlikely(err)) {
+ write_unlock_bh(&policy->lock);
+ if (dst)
+ dst_free(dst);
+ XFRM_INC_STATS(LINUX_MIB_XFRMOUTBUNDLECHECKERROR);
+ goto error;
+ }
+
dst->next = policy->bundles;
policy->bundles = dst;
dst_hold(dst);
}
*dst_p = dst;
dst_release(dst_orig);
- xfrm_pols_put(pols, npols);
+ xfrm_pols_put(pols, npols);
return 0;
error:
- dst_release(dst_orig);
xfrm_pols_put(pols, npols);
+dropdst:
+ dst_release(dst_orig);
*dst_p = NULL;
return err;
+
+nopol:
+ err = -ENOENT;
+ if (flags & XFRM_LOOKUP_ICMP)
+ goto dropdst;
+ return 0;
+}
+EXPORT_SYMBOL(__xfrm_lookup);
+
+int xfrm_lookup(struct dst_entry **dst_p, struct flowi *fl,
+ struct sock *sk, int flags)
+{
+ int err = __xfrm_lookup(dst_p, fl, sk, flags);
+
+ if (err == -EREMOTE) {
+ dst_release(*dst_p);
+ *dst_p = NULL;
+ err = -EAGAIN;
+ }
+
+ return err;
}
EXPORT_SYMBOL(xfrm_lookup);
xfrm_secpath_reject(int idx, struct sk_buff *skb, struct flowi *fl)
{
struct xfrm_state *x;
- int err;
if (!skb->sp || idx < 0 || idx >= skb->sp->len)
return 0;
x = skb->sp->xvec[idx];
if (!x->type->reject)
return 0;
- xfrm_state_hold(x);
- err = x->type->reject(x, skb, fl);
- xfrm_state_put(x);
- return err;
+ return x->type->reject(x, skb, fl);
}
/* When skb is transformed back to its "native" form, we have to
*/
static inline int
-xfrm_state_ok(struct xfrm_tmpl *tmpl, struct xfrm_state *x,
+xfrm_state_ok(struct xfrm_tmpl *tmpl, struct xfrm_state *x,
unsigned short family)
{
if (xfrm_state_kern(x))
- return tmpl->optional && !xfrm_state_addr_cmp(tmpl, x, family);
+ 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) &&
return start;
}
-int
-xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, unsigned short family)
+int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
+ unsigned int family, int reverse)
{
struct xfrm_policy_afinfo *afinfo = xfrm_policy_get_afinfo(family);
int err;
if (unlikely(afinfo == NULL))
return -EAFNOSUPPORT;
- afinfo->decode_session(skb, fl);
+ afinfo->decode_session(skb, fl, reverse);
err = security_xfrm_decode_session(skb, &fl->secid);
xfrm_policy_put_afinfo(afinfo);
return err;
}
-EXPORT_SYMBOL(xfrm_decode_session);
+EXPORT_SYMBOL(__xfrm_decode_session);
static inline int secpath_has_nontransport(struct sec_path *sp, int k, int *idxp)
{
return 0;
}
-int __xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb,
+int __xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb,
unsigned short family)
{
struct xfrm_policy *pol;
int npols = 0;
int xfrm_nr;
int pi;
+ int reverse;
struct flowi fl;
- u8 fl_dir = policy_to_flow_dir(dir);
+ u8 fl_dir;
int xerr_idx = -1;
- if (xfrm_decode_session(skb, &fl, family) < 0)
+ 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(LINUX_MIB_XFRMINHDRERROR);
return 0;
+ }
+
nf_nat_decode_session(skb, &fl, family);
/* First, check used SA against their selectors. */
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))
+ if (!xfrm_selector_match(&x->sel, &fl, family)) {
+ XFRM_INC_STATS(LINUX_MIB_XFRMINSTATEMISMATCH);
return 0;
+ }
}
}
pol = NULL;
- if (sk && sk->sk_policy[dir])
+ if (sk && sk->sk_policy[dir]) {
pol = xfrm_sk_policy_lookup(sk, dir, &fl);
+ if (IS_ERR(pol)) {
+ XFRM_INC_STATS(LINUX_MIB_XFRMINPOLERROR);
+ return 0;
+ }
+ }
if (!pol)
pol = flow_cache_lookup(&fl, family, fl_dir,
xfrm_policy_lookup);
+ if (IS_ERR(pol)) {
+ XFRM_INC_STATS(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(LINUX_MIB_XFRMINNOPOLS);
return 0;
}
return 1;
}
- pol->curlft.use_time = (unsigned long)xtime.tv_sec;
+ pol->curlft.use_time = get_seconds();
pols[0] = pol;
npols ++;
&fl, family,
XFRM_POLICY_IN);
if (pols[1]) {
- pols[1]->curlft.use_time = (unsigned long)xtime.tv_sec;
+ if (IS_ERR(pols[1])) {
+ XFRM_INC_STATS(LINUX_MIB_XFRMINPOLERROR);
+ return 0;
+ }
+ pols[1]->curlft.use_time = get_seconds();
npols ++;
}
}
for (pi = 0; pi < npols; pi++) {
if (pols[pi] != pol &&
- pols[pi]->action != XFRM_POLICY_ALLOW)
+ pols[pi]->action != XFRM_POLICY_ALLOW) {
+ XFRM_INC_STATS(LINUX_MIB_XFRMINPOLBLOCK);
goto reject;
- if (ti + pols[pi]->xfrm_nr >= XFRM_MAX_DEPTH)
+ }
+ if (ti + pols[pi]->xfrm_nr >= XFRM_MAX_DEPTH) {
+ XFRM_INC_STATS(LINUX_MIB_XFRMINBUFFERERROR);
goto reject_error;
+ }
for (i = 0; i < pols[pi]->xfrm_nr; i++)
tpp[ti++] = &pols[pi]->xfrm_vec[i];
}
if (k < -1)
/* "-2 - errored_index" returned */
xerr_idx = -(2+k);
+ XFRM_INC_STATS(LINUX_MIB_XFRMINTMPLMISMATCH);
goto reject;
}
}
- if (secpath_has_nontransport(sp, k, &xerr_idx))
+ if (secpath_has_nontransport(sp, k, &xerr_idx)) {
+ XFRM_INC_STATS(LINUX_MIB_XFRMINTMPLMISMATCH);
goto reject;
+ }
xfrm_pols_put(pols, npols);
return 1;
}
+ XFRM_INC_STATS(LINUX_MIB_XFRMINPOLBLOCK);
reject:
xfrm_secpath_reject(xerr_idx, skb, &fl);
{
struct flowi fl;
- if (xfrm_decode_session(skb, &fl, family) < 0)
+ if (xfrm_decode_session(skb, &fl, family) < 0) {
+ /* XXX: we should have something like FWDHDRERROR here. */
+ XFRM_INC_STATS(LINUX_MIB_XFRMINHDRERROR);
return 0;
+ }
return xfrm_lookup(&skb->dst, &fl, NULL, 0) == 0;
}
static int stale_bundle(struct dst_entry *dst)
{
- return !xfrm_bundle_ok((struct xfrm_dst *)dst, NULL, AF_UNSPEC, 0);
+ return !xfrm_bundle_ok(NULL, (struct xfrm_dst *)dst, NULL, AF_UNSPEC, 0);
}
void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev)
{
while ((dst = dst->child) && dst->xfrm && dst->dev == dev) {
- dst->dev = &loopback_dev;
- dev_hold(&loopback_dev);
+ dst->dev = dev->nd_net->loopback_dev;
+ dev_hold(dst->dev);
dev_put(dev);
}
}
return 0;
}
-void xfrm_init_pmtu(struct dst_entry *dst)
+static void xfrm_init_pmtu(struct dst_entry *dst)
{
do {
struct xfrm_dst *xdst = (struct xfrm_dst *)dst;
} while ((dst = dst->next));
}
-EXPORT_SYMBOL(xfrm_init_pmtu);
-
/* Check that the bundle accepts the flow and its components are
* still valid.
*/
-int xfrm_bundle_ok(struct xfrm_dst *first, struct flowi *fl, int family, int strict)
+int xfrm_bundle_ok(struct xfrm_policy *pol, struct xfrm_dst *first,
+ struct flowi *fl, int family, int strict)
{
struct dst_entry *dst = &first->u.dst;
struct xfrm_dst *last;
if (!dst_check(dst->path, ((struct xfrm_dst *)dst)->path_cookie) ||
(dst->dev && !netif_running(dst->dev)))
return 0;
+#ifdef CONFIG_XFRM_SUB_POLICY
+ if (fl) {
+ if (first->origin && !flow_cache_uli_match(first->origin, fl))
+ return 0;
+ if (first->partner &&
+ !xfrm_selector_match(first->partner, fl, family))
+ return 0;
+ }
+#endif
last = NULL;
if (fl && !xfrm_selector_match(&dst->xfrm->sel, fl, family))
return 0;
- if (fl && !security_xfrm_flow_state_match(fl, dst->xfrm))
+ if (fl && pol &&
+ !security_xfrm_state_pol_flow_match(dst->xfrm, pol, fl))
return 0;
if (dst->xfrm->km.state != XFRM_STATE_VALID)
return 0;
if (xdst->genid != dst->xfrm->genid)
return 0;
- if (strict && fl && dst->xfrm->props.mode != XFRM_MODE_TUNNEL &&
+ if (strict && fl &&
+ !(dst->xfrm->outer_mode->flags & XFRM_MODE_FLAG_TUNNEL) &&
!xfrm_state_addr_flow_check(dst->xfrm, fl, family))
return 0;
if (last == first)
break;
- last = last->u.next;
+ last = (struct xfrm_dst *)last->u.dst.next;
last->child_mtu_cached = mtu;
}
read_unlock(&xfrm_policy_afinfo_lock);
}
-static struct xfrm_policy_afinfo *xfrm_policy_lock_afinfo(unsigned int family)
+static int xfrm_dev_event(struct notifier_block *this, unsigned long event, void *ptr)
{
- struct xfrm_policy_afinfo *afinfo;
- if (unlikely(family >= NPROTO))
- return NULL;
- write_lock_bh(&xfrm_policy_afinfo_lock);
- afinfo = xfrm_policy_afinfo[family];
- if (unlikely(!afinfo))
- write_unlock_bh(&xfrm_policy_afinfo_lock);
- return afinfo;
-}
+ struct net_device *dev = ptr;
-static void xfrm_policy_unlock_afinfo(struct xfrm_policy_afinfo *afinfo)
-{
- write_unlock_bh(&xfrm_policy_afinfo_lock);
-}
+ if (dev->nd_net != &init_net)
+ return NOTIFY_DONE;
-static int xfrm_dev_event(struct notifier_block *this, unsigned long event, void *ptr)
-{
switch (event) {
case NETDEV_DOWN:
xfrm_flush_bundles();
0
};
+#ifdef CONFIG_XFRM_STATISTICS
+static int __init xfrm_statistics_init(void)
+{
+ if (snmp_mib_init((void **)xfrm_statistics,
+ sizeof(struct linux_xfrm_mib)) < 0)
+ return -ENOMEM;
+ return 0;
+}
+#endif
+
static void __init xfrm_policy_init(void)
{
unsigned int hmask, sz;
xfrm_dst_cache = kmem_cache_create("xfrm_dst_cache",
sizeof(struct xfrm_dst),
0, SLAB_HWCACHE_ALIGN|SLAB_PANIC,
- NULL, NULL);
+ NULL);
hmask = 8 - 1;
sz = (hmask+1) * sizeof(struct hlist_head);
panic("XFRM: failed to allocate bydst hash\n");
}
- INIT_WORK(&xfrm_policy_gc_work, xfrm_policy_gc_task, NULL);
+ INIT_WORK(&xfrm_policy_gc_work, xfrm_policy_gc_task);
register_netdevice_notifier(&xfrm_dev_notifier);
}
void __init xfrm_init(void)
{
+#ifdef CONFIG_XFRM_STATISTICS
+ xfrm_statistics_init();
+#endif
xfrm_state_init();
xfrm_policy_init();
xfrm_input_init();
+#ifdef CONFIG_XFRM_STATISTICS
+ xfrm_proc_init();
+#endif
+}
+
+#ifdef CONFIG_AUDITSYSCALL
+static inline 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=" NIPQUAD_FMT,
+ NIPQUAD(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=" NIPQUAD_FMT,
+ NIPQUAD(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=" NIP6_FMT,
+ NIP6(*(struct in6_addr *)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=" NIP6_FMT,
+ NIP6(*(struct in6_addr *)sel->daddr.a6));
+ if (sel->prefixlen_d != 128)
+ audit_log_format(audit_buf, " dst_prefixlen=%d",
+ sel->prefixlen_d);
+ break;
+ }
+}
+
+void xfrm_audit_policy_add(struct xfrm_policy *xp, int result,
+ u32 auid, u32 secid)
+{
+ struct audit_buffer *audit_buf;
+
+ audit_buf = xfrm_audit_start("SPD-add");
+ if (audit_buf == NULL)
+ return;
+ xfrm_audit_helper_usrinfo(auid, secid, audit_buf);
+ audit_log_format(audit_buf, " res=%u", result);
+ xfrm_audit_common_policyinfo(xp, audit_buf);
+ audit_log_end(audit_buf);
+}
+EXPORT_SYMBOL_GPL(xfrm_audit_policy_add);
+
+void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
+ u32 auid, u32 secid)
+{
+ struct audit_buffer *audit_buf;
+
+ audit_buf = xfrm_audit_start("SPD-delete");
+ if (audit_buf == NULL)
+ return;
+ xfrm_audit_helper_usrinfo(auid, secid, audit_buf);
+ audit_log_format(audit_buf, " res=%u", result);
+ xfrm_audit_common_policyinfo(xp, audit_buf);
+ audit_log_end(audit_buf);
+}
+EXPORT_SYMBOL_GPL(xfrm_audit_policy_delete);
+#endif
+
+#ifdef CONFIG_XFRM_MIGRATE
+static int xfrm_migrate_selector_match(struct xfrm_selector *sel_cmp,
+ struct xfrm_selector *sel_tgt)
+{
+ if (sel_cmp->proto == IPSEC_ULPROTO_ANY) {
+ if (sel_tgt->family == sel_cmp->family &&
+ xfrm_addr_cmp(&sel_tgt->daddr, &sel_cmp->daddr,
+ sel_cmp->family) == 0 &&
+ xfrm_addr_cmp(&sel_tgt->saddr, &sel_cmp->saddr,
+ sel_cmp->family) == 0 &&
+ sel_tgt->prefixlen_d == sel_cmp->prefixlen_d &&
+ sel_tgt->prefixlen_s == sel_cmp->prefixlen_s) {
+ return 1;
+ }
+ } else {
+ if (memcmp(sel_tgt, sel_cmp, sizeof(*sel_tgt)) == 0) {
+ return 1;
+ }
+ }
+ return 0;
+}
+
+static struct xfrm_policy * xfrm_migrate_policy_find(struct xfrm_selector *sel,
+ u8 dir, u8 type)
+{
+ struct xfrm_policy *pol, *ret = NULL;
+ struct hlist_node *entry;
+ struct hlist_head *chain;
+ u32 priority = ~0U;
+
+ read_lock_bh(&xfrm_policy_lock);
+ chain = policy_hash_direct(&sel->daddr, &sel->saddr, sel->family, dir);
+ hlist_for_each_entry(pol, entry, chain, bydst) {
+ if (xfrm_migrate_selector_match(sel, &pol->selector) &&
+ pol->type == type) {
+ ret = pol;
+ priority = ret->priority;
+ break;
+ }
+ }
+ chain = &xfrm_policy_inexact[dir];
+ hlist_for_each_entry(pol, entry, chain, bydst) {
+ if (xfrm_migrate_selector_match(sel, &pol->selector) &&
+ pol->type == type &&
+ pol->priority < priority) {
+ ret = pol;
+ break;
+ }
+ }
+
+ if (ret)
+ xfrm_pol_hold(ret);
+
+ read_unlock_bh(&xfrm_policy_lock);
+
+ return ret;
+}
+
+static int migrate_tmpl_match(struct xfrm_migrate *m, 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_cmp(&t->id.daddr, &m->old_daddr,
+ m->old_family) == 0 &&
+ xfrm_addr_cmp(&t->saddr, &m->old_saddr,
+ m->old_family) == 0) {
+ 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;
}
+/* 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;
+ struct dst_entry *dst;
+ int i, j, n = 0;
+
+ write_lock_bh(&pol->lock);
+ if (unlikely(pol->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 */
+ while ((dst = pol->bundles) != NULL) {
+ pol->bundles = dst->next;
+ dst_free(dst);
+ }
+ }
+ }
+
+ write_unlock_bh(&pol->lock);
+
+ if (!n)
+ return -ENODATA;
+
+ return 0;
+}
+
+static int xfrm_migrate_check(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_cmp(&m[i].old_daddr, &m[i].new_daddr,
+ m[i].old_family) == 0) &&
+ (xfrm_addr_cmp(&m[i].old_saddr, &m[i].new_saddr,
+ m[i].old_family) == 0))
+ 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;
+}
+
+int xfrm_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
+ struct xfrm_migrate *m, int num_migrate)
+{
+ 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)) == 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))) {
+ 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);
+
+ 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;
+}
+EXPORT_SYMBOL(xfrm_migrate);
+#endif
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff