#include <linux/pfkeyv2.h>
#include <linux/ipsec.h>
#include <linux/module.h>
+#include <linux/cache.h>
+#include <linux/audit.h>
#include <asm/uaccess.h>
+#include "xfrm_hash.h"
+
struct sock *xfrm_nl;
EXPORT_SYMBOL(xfrm_nl);
-u32 sysctl_xfrm_aevent_etime = XFRM_AE_ETIME;
+u32 sysctl_xfrm_aevent_etime __read_mostly = XFRM_AE_ETIME;
EXPORT_SYMBOL(sysctl_xfrm_aevent_etime);
-u32 sysctl_xfrm_aevent_rseqth = XFRM_AE_SEQT_SIZE;
+u32 sysctl_xfrm_aevent_rseqth __read_mostly = XFRM_AE_SEQT_SIZE;
EXPORT_SYMBOL(sysctl_xfrm_aevent_rseqth);
+u32 sysctl_xfrm_acq_expires __read_mostly = 30;
+
/* 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 to find what SAs exist for given
+ 2. Hash table by (daddr,family,reqid) to find what SAs exist for given
destination/tunnel endpoint. (output)
*/
static DEFINE_SPINLOCK(xfrm_state_lock);
-#define XFRM_DST_HSIZE 1024
-
/* Hash table to find appropriate SA towards given target (endpoint
* of tunnel or destination of transport mode) allowed by selector.
*
* Main use is finding SA after policy selected tunnel or transport mode.
* Also, it can be used by ah/esp icmp error handler to find offending SA.
*/
-static struct hlist_head xfrm_state_bydst[XFRM_DST_HSIZE];
-static struct hlist_head xfrm_state_bysrc[XFRM_DST_HSIZE];
-static struct hlist_head xfrm_state_byspi[XFRM_DST_HSIZE];
+static struct hlist_head *xfrm_state_bydst __read_mostly;
+static struct hlist_head *xfrm_state_bysrc __read_mostly;
+static struct hlist_head *xfrm_state_byspi __read_mostly;
+static unsigned int xfrm_state_hmask __read_mostly;
+static unsigned int xfrm_state_hashmax __read_mostly = 1 * 1024 * 1024;
+static unsigned int xfrm_state_num;
+static unsigned int xfrm_state_genid;
+
+static struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family);
+static void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo);
-static __inline__
-unsigned __xfrm4_dst_hash(xfrm_address_t *addr)
+#ifdef CONFIG_AUDITSYSCALL
+static void xfrm_audit_state_replay(struct xfrm_state *x,
+ struct sk_buff *skb, __be32 net_seq);
+#else
+#define xfrm_audit_state_replay(x, s, sq) do { ; } while (0)
+#endif /* CONFIG_AUDITSYSCALL */
+
+static inline unsigned int xfrm_dst_hash(xfrm_address_t *daddr,
+ xfrm_address_t *saddr,
+ u32 reqid,
+ unsigned short family)
{
- unsigned h;
- h = ntohl(addr->a4);
- h = (h ^ (h>>16)) % XFRM_DST_HSIZE;
- return h;
+ return __xfrm_dst_hash(daddr, saddr, reqid, family, xfrm_state_hmask);
}
-static __inline__
-unsigned __xfrm6_dst_hash(xfrm_address_t *addr)
+static inline unsigned int xfrm_src_hash(xfrm_address_t *daddr,
+ xfrm_address_t *saddr,
+ unsigned short family)
{
- unsigned h;
- h = ntohl(addr->a6[2]^addr->a6[3]);
- h = (h ^ (h>>16)) % XFRM_DST_HSIZE;
- return h;
+ return __xfrm_src_hash(daddr, saddr, family, xfrm_state_hmask);
}
-static __inline__
-unsigned __xfrm4_src_hash(xfrm_address_t *addr)
+static inline unsigned int
+xfrm_spi_hash(xfrm_address_t *daddr, __be32 spi, u8 proto, unsigned short family)
{
- return __xfrm4_dst_hash(addr);
+ return __xfrm_spi_hash(daddr, spi, proto, family, xfrm_state_hmask);
}
-static __inline__
-unsigned __xfrm6_src_hash(xfrm_address_t *addr)
+static void xfrm_hash_transfer(struct hlist_head *list,
+ struct hlist_head *ndsttable,
+ struct hlist_head *nsrctable,
+ struct hlist_head *nspitable,
+ unsigned int nhashmask)
{
- return __xfrm6_dst_hash(addr);
-}
+ struct hlist_node *entry, *tmp;
+ struct xfrm_state *x;
-static __inline__
-unsigned xfrm_src_hash(xfrm_address_t *addr, unsigned short family)
-{
- switch (family) {
- case AF_INET:
- return __xfrm4_src_hash(addr);
- case AF_INET6:
- return __xfrm6_src_hash(addr);
- }
- return 0;
-}
+ hlist_for_each_entry_safe(x, entry, tmp, list, bydst) {
+ unsigned int h;
-static __inline__
-unsigned xfrm_dst_hash(xfrm_address_t *addr, unsigned short family)
-{
- switch (family) {
- case AF_INET:
- return __xfrm4_dst_hash(addr);
- case AF_INET6:
- return __xfrm6_dst_hash(addr);
+ h = __xfrm_dst_hash(&x->id.daddr, &x->props.saddr,
+ x->props.reqid, x->props.family,
+ nhashmask);
+ hlist_add_head(&x->bydst, ndsttable+h);
+
+ h = __xfrm_src_hash(&x->id.daddr, &x->props.saddr,
+ x->props.family,
+ nhashmask);
+ hlist_add_head(&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(&x->byspi, nspitable+h);
+ }
}
- return 0;
}
-static __inline__
-unsigned __xfrm4_spi_hash(xfrm_address_t *addr, u32 spi, u8 proto)
+static unsigned long xfrm_hash_new_size(void)
{
- unsigned h;
- h = ntohl(addr->a4^spi^proto);
- h = (h ^ (h>>10) ^ (h>>20)) % XFRM_DST_HSIZE;
- return h;
+ return ((xfrm_state_hmask + 1) << 1) *
+ sizeof(struct hlist_head);
}
-static __inline__
-unsigned __xfrm6_spi_hash(xfrm_address_t *addr, u32 spi, u8 proto)
-{
- unsigned h;
- h = ntohl(addr->a6[2]^addr->a6[3]^spi^proto);
- h = (h ^ (h>>10) ^ (h>>20)) % XFRM_DST_HSIZE;
- return h;
-}
+static DEFINE_MUTEX(hash_resize_mutex);
-static __inline__
-unsigned xfrm_spi_hash(xfrm_address_t *addr, u32 spi, u8 proto, unsigned short family)
+static void xfrm_hash_resize(struct work_struct *__unused)
{
- switch (family) {
- case AF_INET:
- return __xfrm4_spi_hash(addr, spi, proto);
- case AF_INET6:
- return __xfrm6_spi_hash(addr, spi, proto);
+ struct hlist_head *ndst, *nsrc, *nspi, *odst, *osrc, *ospi;
+ unsigned long nsize, osize;
+ unsigned int nhashmask, ohashmask;
+ int i;
+
+ mutex_lock(&hash_resize_mutex);
+
+ nsize = xfrm_hash_new_size();
+ ndst = xfrm_hash_alloc(nsize);
+ if (!ndst)
+ goto out_unlock;
+ nsrc = xfrm_hash_alloc(nsize);
+ if (!nsrc) {
+ xfrm_hash_free(ndst, nsize);
+ goto out_unlock;
}
- return 0; /*XXX*/
+ nspi = xfrm_hash_alloc(nsize);
+ if (!nspi) {
+ xfrm_hash_free(ndst, nsize);
+ xfrm_hash_free(nsrc, nsize);
+ goto out_unlock;
+ }
+
+ spin_lock_bh(&xfrm_state_lock);
+
+ nhashmask = (nsize / sizeof(struct hlist_head)) - 1U;
+ for (i = xfrm_state_hmask; i >= 0; i--)
+ xfrm_hash_transfer(xfrm_state_bydst+i, ndst, nsrc, nspi,
+ nhashmask);
+
+ odst = xfrm_state_bydst;
+ osrc = xfrm_state_bysrc;
+ ospi = xfrm_state_byspi;
+ ohashmask = xfrm_state_hmask;
+
+ xfrm_state_bydst = ndst;
+ xfrm_state_bysrc = nsrc;
+ xfrm_state_byspi = nspi;
+ xfrm_state_hmask = nhashmask;
+
+ spin_unlock_bh(&xfrm_state_lock);
+
+ osize = (ohashmask + 1) * sizeof(struct hlist_head);
+ xfrm_hash_free(odst, osize);
+ xfrm_hash_free(osrc, osize);
+ xfrm_hash_free(ospi, osize);
+
+out_unlock:
+ mutex_unlock(&hash_resize_mutex);
}
+static DECLARE_WORK(xfrm_hash_work, xfrm_hash_resize);
+
DECLARE_WAIT_QUEUE_HEAD(km_waitq);
EXPORT_SYMBOL(km_waitq);
static HLIST_HEAD(xfrm_state_gc_list);
static DEFINE_SPINLOCK(xfrm_state_gc_lock);
-static int xfrm_state_gc_flush_bundles;
-
int __xfrm_state_delete(struct xfrm_state *x);
-static struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned short family);
-static void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo);
-
int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol);
void km_state_expired(struct xfrm_state *x, int hard, u32 pid);
+static struct xfrm_state_afinfo *xfrm_state_lock_afinfo(unsigned int family)
+{
+ struct xfrm_state_afinfo *afinfo;
+ if (unlikely(family >= NPROTO))
+ return NULL;
+ write_lock_bh(&xfrm_state_afinfo_lock);
+ afinfo = xfrm_state_afinfo[family];
+ if (unlikely(!afinfo))
+ write_unlock_bh(&xfrm_state_afinfo_lock);
+ return afinfo;
+}
+
+static void xfrm_state_unlock_afinfo(struct xfrm_state_afinfo *afinfo)
+ __releases(xfrm_state_afinfo_lock)
+{
+ write_unlock_bh(&xfrm_state_afinfo_lock);
+}
+
+int xfrm_register_type(const struct xfrm_type *type, unsigned short family)
+{
+ struct xfrm_state_afinfo *afinfo = xfrm_state_lock_afinfo(family);
+ const 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_state_unlock_afinfo(afinfo);
+ return err;
+}
+EXPORT_SYMBOL(xfrm_register_type);
+
+int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family)
+{
+ struct xfrm_state_afinfo *afinfo = xfrm_state_lock_afinfo(family);
+ const 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_state_unlock_afinfo(afinfo);
+ return err;
+}
+EXPORT_SYMBOL(xfrm_unregister_type);
+
+static const struct xfrm_type *xfrm_get_type(u8 proto, unsigned short family)
+{
+ struct xfrm_state_afinfo *afinfo;
+ const struct xfrm_type **typemap;
+ const struct xfrm_type *type;
+ int modload_attempted = 0;
+
+retry:
+ afinfo = xfrm_state_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_state_put_afinfo(afinfo);
+ request_module("xfrm-type-%d-%d", family, proto);
+ modload_attempted = 1;
+ goto retry;
+ }
+
+ xfrm_state_put_afinfo(afinfo);
+ return type;
+}
+
+static void xfrm_put_type(const struct xfrm_type *type)
+{
+ module_put(type->owner);
+}
+
+int xfrm_register_mode(struct xfrm_mode *mode, int family)
+{
+ struct xfrm_state_afinfo *afinfo;
+ struct xfrm_mode **modemap;
+ int err;
+
+ if (unlikely(mode->encap >= XFRM_MODE_MAX))
+ return -EINVAL;
+
+ afinfo = xfrm_state_lock_afinfo(family);
+ if (unlikely(afinfo == NULL))
+ return -EAFNOSUPPORT;
+
+ err = -EEXIST;
+ modemap = afinfo->mode_map;
+ if (modemap[mode->encap])
+ goto out;
+
+ err = -ENOENT;
+ if (!try_module_get(afinfo->owner))
+ goto out;
+
+ mode->afinfo = afinfo;
+ modemap[mode->encap] = mode;
+ err = 0;
+
+out:
+ xfrm_state_unlock_afinfo(afinfo);
+ return err;
+}
+EXPORT_SYMBOL(xfrm_register_mode);
+
+int xfrm_unregister_mode(struct xfrm_mode *mode, int family)
+{
+ struct xfrm_state_afinfo *afinfo;
+ struct xfrm_mode **modemap;
+ int err;
+
+ if (unlikely(mode->encap >= XFRM_MODE_MAX))
+ return -EINVAL;
+
+ afinfo = xfrm_state_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;
+ module_put(mode->afinfo->owner);
+ err = 0;
+ }
+
+ xfrm_state_unlock_afinfo(afinfo);
+ return err;
+}
+EXPORT_SYMBOL(xfrm_unregister_mode);
+
+static struct xfrm_mode *xfrm_get_mode(unsigned int encap, int family)
+{
+ struct xfrm_state_afinfo *afinfo;
+ struct xfrm_mode *mode;
+ int modload_attempted = 0;
+
+ if (unlikely(encap >= XFRM_MODE_MAX))
+ return NULL;
+
+retry:
+ afinfo = xfrm_state_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_state_put_afinfo(afinfo);
+ request_module("xfrm-mode-%d-%d", family, encap);
+ modload_attempted = 1;
+ goto retry;
+ }
+
+ xfrm_state_put_afinfo(afinfo);
+ return mode;
+}
+
+static void xfrm_put_mode(struct xfrm_mode *mode)
+{
+ module_put(mode->owner);
+}
+
static void xfrm_state_gc_destroy(struct xfrm_state *x)
{
- if (del_timer(&x->timer))
- BUG();
- if (del_timer(&x->rtimer))
- BUG();
+ del_timer_sync(&x->timer);
+ del_timer_sync(&x->rtimer);
kfree(x->aalg);
kfree(x->ealg);
kfree(x->calg);
kfree(x->encap);
kfree(x->coaddr);
- if (x->mode)
- xfrm_put_mode(x->mode);
+ if (x->inner_mode)
+ xfrm_put_mode(x->inner_mode);
+ if (x->inner_mode_iaf)
+ xfrm_put_mode(x->inner_mode_iaf);
+ if (x->outer_mode)
+ xfrm_put_mode(x->outer_mode);
if (x->type) {
x->type->destructor(x);
xfrm_put_type(x->type);
kfree(x);
}
-static void xfrm_state_gc_task(void *data)
+static void xfrm_state_gc_task(struct work_struct *data)
{
struct xfrm_state *x;
struct hlist_node *entry, *tmp;
struct hlist_head gc_list;
- if (xfrm_state_gc_flush_bundles) {
- xfrm_state_gc_flush_bundles = 0;
- xfrm_flush_bundles();
- }
-
spin_lock_bh(&xfrm_state_gc_lock);
gc_list.first = xfrm_state_gc_list.first;
INIT_HLIST_HEAD(&xfrm_state_gc_list);
if (secs >= (MAX_SCHEDULE_TIMEOUT-1)/HZ)
return MAX_SCHEDULE_TIMEOUT-1;
else
- return secs*HZ;
+ return secs*HZ;
}
static void xfrm_timer_handler(unsigned long data)
{
struct xfrm_state *x = (struct xfrm_state*)data;
- unsigned long now = (unsigned long)xtime.tv_sec;
+ unsigned long now = get_seconds();
long next = LONG_MAX;
int warn = 0;
+ int err = 0;
spin_lock(&x->lock);
if (x->km.state == XFRM_STATE_DEAD)
if (warn)
km_state_expired(x, 0, 0);
resched:
- if (next != LONG_MAX &&
- !mod_timer(&x->timer, jiffies + make_jiffies(next)))
- xfrm_state_hold(x);
+ if (next != LONG_MAX)
+ mod_timer(&x->timer, jiffies + make_jiffies(next));
+
goto out;
expired:
next = 2;
goto resched;
}
- if (!__xfrm_state_delete(x) && x->id.spi)
+
+ err = __xfrm_state_delete(x);
+ if (!err && x->id.spi)
km_state_expired(x, 1, 0);
+ xfrm_audit_state_delete(x, err ? 0 : 1,
+ audit_get_loginuid(current), 0);
+
out:
spin_unlock(&x->lock);
- xfrm_state_put(x);
}
static void xfrm_replay_timer_handler(unsigned long data);
INIT_HLIST_NODE(&x->bydst);
INIT_HLIST_NODE(&x->bysrc);
INIT_HLIST_NODE(&x->byspi);
- init_timer(&x->timer);
- x->timer.function = xfrm_timer_handler;
- x->timer.data = (unsigned long)x;
- init_timer(&x->rtimer);
- x->rtimer.function = xfrm_replay_timer_handler;
- x->rtimer.data = (unsigned long)x;
- x->curlft.add_time = (unsigned long)xtime.tv_sec;
+ setup_timer(&x->timer, xfrm_timer_handler, (unsigned long)x);
+ setup_timer(&x->rtimer, xfrm_replay_timer_handler,
+ (unsigned long)x);
+ x->curlft.add_time = get_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;
+ x->inner_mode = NULL;
+ x->inner_mode_iaf = NULL;
spin_lock_init(&x->lock);
}
return x;
x->km.state = XFRM_STATE_DEAD;
spin_lock(&xfrm_state_lock);
hlist_del(&x->bydst);
- __xfrm_state_put(x);
hlist_del(&x->bysrc);
- __xfrm_state_put(x);
- if (x->id.spi) {
+ if (x->id.spi)
hlist_del(&x->byspi);
- __xfrm_state_put(x);
- }
+ xfrm_state_num--;
spin_unlock(&xfrm_state_lock);
- if (del_timer(&x->timer))
- __xfrm_state_put(x);
- if (del_timer(&x->rtimer))
- __xfrm_state_put(x);
-
- /* The number two in this test is the reference
- * mentioned in the comment below plus the reference
- * our caller holds. A larger value means that
- * there are DSTs attached to this xfrm_state.
- */
- if (atomic_read(&x->refcnt) > 2) {
- xfrm_state_gc_flush_bundles = 1;
- schedule_work(&xfrm_state_gc_work);
- }
/* 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);
+ xfrm_state_put(x);
err = 0;
}
}
EXPORT_SYMBOL(xfrm_state_delete);
-void xfrm_state_flush(u8 proto)
+#ifdef CONFIG_SECURITY_NETWORK_XFRM
+static inline int
+xfrm_state_flush_secctx_check(u8 proto, struct xfrm_audit *audit_info)
{
- int i;
+ int i, err = 0;
+
+ for (i = 0; i <= xfrm_state_hmask; i++) {
+ struct hlist_node *entry;
+ struct xfrm_state *x;
+
+ hlist_for_each_entry(x, entry, 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,
+ audit_info->loginuid,
+ audit_info->secid);
+ return err;
+ }
+ }
+ }
+
+ return err;
+}
+#else
+static inline int
+xfrm_state_flush_secctx_check(u8 proto, struct xfrm_audit *audit_info)
+{
+ return 0;
+}
+#endif
+
+int xfrm_state_flush(u8 proto, struct xfrm_audit *audit_info)
+{
+ int i, err = 0;
spin_lock_bh(&xfrm_state_lock);
- for (i = 0; i < XFRM_DST_HSIZE; i++) {
+ err = xfrm_state_flush_secctx_check(proto, audit_info);
+ if (err)
+ goto out;
+
+ for (i = 0; i <= xfrm_state_hmask; i++) {
struct hlist_node *entry;
struct xfrm_state *x;
restart:
xfrm_state_hold(x);
spin_unlock_bh(&xfrm_state_lock);
- xfrm_state_delete(x);
+ err = xfrm_state_delete(x);
+ xfrm_audit_state_delete(x, err ? 0 : 1,
+ audit_info->loginuid,
+ audit_info->secid);
xfrm_state_put(x);
spin_lock_bh(&xfrm_state_lock);
}
}
}
+ err = 0;
+
+out:
spin_unlock_bh(&xfrm_state_lock);
wake_up(&km_waitq);
+ return err;
}
EXPORT_SYMBOL(xfrm_state_flush);
+void xfrm_sad_getinfo(struct xfrmk_sadinfo *si)
+{
+ spin_lock_bh(&xfrm_state_lock);
+ si->sadcnt = xfrm_state_num;
+ si->sadhcnt = xfrm_state_hmask;
+ si->sadhmcnt = xfrm_state_hashmax;
+ spin_unlock_bh(&xfrm_state_lock);
+}
+EXPORT_SYMBOL(xfrm_sad_getinfo);
+
static int
xfrm_init_tempsel(struct xfrm_state *x, struct flowi *fl,
struct xfrm_tmpl *tmpl,
return 0;
}
-static struct xfrm_state *__xfrm_state_lookup(xfrm_address_t *daddr, u32 spi, u8 proto, unsigned short family)
+static struct xfrm_state *__xfrm_state_lookup(xfrm_address_t *daddr, __be32 spi, u8 proto, unsigned short family)
{
unsigned int h = xfrm_spi_hash(daddr, spi, proto, family);
struct xfrm_state *x;
x->id.daddr.a6))
continue;
break;
- };
+ }
xfrm_state_hold(x);
return x;
static struct xfrm_state *__xfrm_state_lookup_byaddr(xfrm_address_t *daddr, xfrm_address_t *saddr, u8 proto, unsigned short family)
{
- unsigned int h = xfrm_src_hash(saddr, family);
+ unsigned int h = xfrm_src_hash(daddr, saddr, family);
struct xfrm_state *x;
struct hlist_node *entry;
x->props.saddr.a6))
continue;
break;
- };
+ }
xfrm_state_hold(x);
return x;
x->id.proto, family);
}
+static void xfrm_hash_grow_check(int have_hash_collision)
+{
+ if (have_hash_collision &&
+ (xfrm_state_hmask + 1) < xfrm_state_hashmax &&
+ xfrm_state_num > xfrm_state_hmask)
+ schedule_work(&xfrm_hash_work);
+}
+
struct xfrm_state *
-xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t *saddr,
+xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t *saddr,
struct flowi *fl, struct xfrm_tmpl *tmpl,
struct xfrm_policy *pol, int *err,
unsigned short family)
{
- unsigned int h = xfrm_dst_hash(daddr, family);
+ unsigned int h;
struct hlist_node *entry;
struct xfrm_state *x, *x0;
int acquire_in_progress = 0;
int error = 0;
struct xfrm_state *best = NULL;
-
+
spin_lock_bh(&xfrm_state_lock);
+ h = xfrm_dst_hash(daddr, saddr, tmpl->reqid, family);
hlist_for_each_entry(x, entry, xfrm_state_bydst+h, bydst) {
if (x->props.family == family &&
x->props.reqid == tmpl->reqid &&
selector.
*/
if (x->km.state == XFRM_STATE_VALID) {
- if (!xfrm_selector_match(&x->sel, fl, family) ||
+ if ((x->sel.family && !xfrm_selector_match(&x->sel, fl, x->sel.family)) ||
!security_xfrm_state_pol_flow_match(x, pol, fl))
continue;
if (!best ||
acquire_in_progress = 1;
} else if (x->km.state == XFRM_STATE_ERROR ||
x->km.state == XFRM_STATE_EXPIRED) {
- if (xfrm_selector_match(&x->sel, fl, family) &&
+ if (xfrm_selector_match(&x->sel, fl, x->sel.family) &&
security_xfrm_state_pol_flow_match(x, pol, fl))
error = -ESRCH;
}
if (km_query(x, tmpl, pol) == 0) {
x->km.state = XFRM_STATE_ACQ;
hlist_add_head(&x->bydst, xfrm_state_bydst+h);
- xfrm_state_hold(x);
- h = xfrm_src_hash(saddr, family);
+ h = xfrm_src_hash(daddr, saddr, family);
hlist_add_head(&x->bysrc, xfrm_state_bysrc+h);
- xfrm_state_hold(x);
if (x->id.spi) {
h = xfrm_spi_hash(&x->id.daddr, x->id.spi, x->id.proto, family);
hlist_add_head(&x->byspi, xfrm_state_byspi+h);
- xfrm_state_hold(x);
}
- x->lft.hard_add_expires_seconds = XFRM_ACQ_EXPIRES;
- xfrm_state_hold(x);
- x->timer.expires = jiffies + XFRM_ACQ_EXPIRES*HZ;
+ x->lft.hard_add_expires_seconds = sysctl_xfrm_acq_expires;
+ x->timer.expires = jiffies + sysctl_xfrm_acq_expires*HZ;
add_timer(&x->timer);
+ xfrm_state_num++;
+ xfrm_hash_grow_check(x->bydst.next != NULL);
} else {
x->km.state = XFRM_STATE_DEAD;
xfrm_state_put(x);
return x;
}
+struct xfrm_state *
+xfrm_stateonly_find(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;
+ struct hlist_node *entry;
+
+ spin_lock(&xfrm_state_lock);
+ h = xfrm_dst_hash(daddr, saddr, reqid, family);
+ hlist_for_each_entry(x, entry, xfrm_state_bydst+h, bydst) {
+ if (x->props.family == family &&
+ x->props.reqid == reqid &&
+ !(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(&xfrm_state_lock);
+
+
+ return rx;
+}
+EXPORT_SYMBOL(xfrm_stateonly_find);
+
static void __xfrm_state_insert(struct xfrm_state *x)
{
- unsigned h = xfrm_dst_hash(&x->id.daddr, x->props.family);
+ unsigned int h;
- hlist_add_head(&x->bydst, xfrm_state_bydst+h);
- xfrm_state_hold(x);
+ x->genid = ++xfrm_state_genid;
- h = xfrm_src_hash(&x->props.saddr, x->props.family);
+ h = xfrm_dst_hash(&x->id.daddr, &x->props.saddr,
+ x->props.reqid, x->props.family);
+ hlist_add_head(&x->bydst, xfrm_state_bydst+h);
+ h = xfrm_src_hash(&x->id.daddr, &x->props.saddr, x->props.family);
hlist_add_head(&x->bysrc, xfrm_state_bysrc+h);
- xfrm_state_hold(x);
- if (xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY)) {
+ if (x->id.spi) {
h = xfrm_spi_hash(&x->id.daddr, x->id.spi, x->id.proto,
x->props.family);
hlist_add_head(&x->byspi, xfrm_state_byspi+h);
- xfrm_state_hold(x);
}
- if (!mod_timer(&x->timer, jiffies + HZ))
- xfrm_state_hold(x);
-
- if (x->replay_maxage &&
- !mod_timer(&x->rtimer, jiffies + x->replay_maxage))
- xfrm_state_hold(x);
+ mod_timer(&x->timer, jiffies + HZ);
+ if (x->replay_maxage)
+ mod_timer(&x->rtimer, jiffies + x->replay_maxage);
wake_up(&km_waitq);
+
+ xfrm_state_num++;
+
+ xfrm_hash_grow_check(x->bydst.next != NULL);
+}
+
+/* xfrm_state_lock is held */
+static void __xfrm_state_bump_genids(struct xfrm_state *xnew)
+{
+ unsigned short family = xnew->props.family;
+ u32 reqid = xnew->props.reqid;
+ struct xfrm_state *x;
+ struct hlist_node *entry;
+ unsigned int h;
+
+ h = xfrm_dst_hash(&xnew->id.daddr, &xnew->props.saddr, reqid, family);
+ hlist_for_each_entry(x, entry, xfrm_state_bydst+h, bydst) {
+ if (x->props.family == family &&
+ x->props.reqid == reqid &&
+ !xfrm_addr_cmp(&x->id.daddr, &xnew->id.daddr, family) &&
+ !xfrm_addr_cmp(&x->props.saddr, &xnew->props.saddr, family))
+ x->genid = xfrm_state_genid;
+ }
}
void xfrm_state_insert(struct xfrm_state *x)
{
spin_lock_bh(&xfrm_state_lock);
+ __xfrm_state_bump_genids(x);
__xfrm_state_insert(x);
spin_unlock_bh(&xfrm_state_lock);
-
- xfrm_flush_all_bundles();
}
EXPORT_SYMBOL(xfrm_state_insert);
/* xfrm_state_lock is held */
static struct xfrm_state *__find_acq_core(unsigned short family, u8 mode, u32 reqid, u8 proto, xfrm_address_t *daddr, xfrm_address_t *saddr, int create)
{
- unsigned int h = xfrm_dst_hash(daddr, family);
+ unsigned int h = xfrm_dst_hash(daddr, saddr, reqid, family);
struct hlist_node *entry;
struct xfrm_state *x;
x->props.mode != mode ||
x->props.family != family ||
x->km.state != XFRM_STATE_ACQ ||
- x->id.spi != 0)
+ x->id.spi != 0 ||
+ x->id.proto != proto)
continue;
switch (family) {
(struct in6_addr *)saddr))
continue;
break;
- };
+ }
xfrm_state_hold(x);
return x;
ipv6_addr_copy((struct in6_addr *)x->id.daddr.a6,
(struct in6_addr *)daddr);
break;
- };
+ }
x->km.state = XFRM_STATE_ACQ;
x->id.proto = proto;
x->props.family = family;
x->props.mode = mode;
x->props.reqid = reqid;
- x->lft.hard_add_expires_seconds = XFRM_ACQ_EXPIRES;
+ x->lft.hard_add_expires_seconds = sysctl_xfrm_acq_expires;
xfrm_state_hold(x);
- x->timer.expires = jiffies + XFRM_ACQ_EXPIRES*HZ;
+ x->timer.expires = jiffies + sysctl_xfrm_acq_expires*HZ;
add_timer(&x->timer);
- xfrm_state_hold(x);
hlist_add_head(&x->bydst, xfrm_state_bydst+h);
- h = xfrm_src_hash(saddr, family);
- xfrm_state_hold(x);
+ h = xfrm_src_hash(daddr, saddr, family);
hlist_add_head(&x->bysrc, xfrm_state_bysrc+h);
- wake_up(&km_waitq);
+
+ xfrm_state_num++;
+
+ xfrm_hash_grow_check(x->bydst.next != NULL);
}
return x;
if (use_spi && x->km.seq) {
x1 = __xfrm_find_acq_byseq(x->km.seq);
- if (x1 && xfrm_addr_cmp(&x1->id.daddr, &x->id.daddr, family)) {
+ if (x1 && ((x1->id.proto != x->id.proto) ||
+ xfrm_addr_cmp(&x1->id.daddr, &x->id.daddr, family))) {
xfrm_state_put(x1);
x1 = NULL;
}
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(&xfrm_state_lock);
- if (!err)
- xfrm_flush_all_bundles();
-
if (x1) {
xfrm_state_delete(x1);
xfrm_state_put(x1);
}
EXPORT_SYMBOL(xfrm_state_add);
+#ifdef CONFIG_XFRM_MIGRATE
+static struct xfrm_state *xfrm_state_clone(struct xfrm_state *orig, int *errp)
+{
+ int err = -ENOMEM;
+ struct xfrm_state *x = xfrm_state_alloc();
+ if (!x)
+ goto error;
+
+ 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_clone(orig->aalg);
+ if (!x->aalg)
+ goto error;
+ }
+ x->props.aalgo = orig->props.aalgo;
+
+ 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 (orig->encap) {
+ x->encap = kmemdup(orig->encap, sizeof(*x->encap), GFP_KERNEL);
+ if (!x->encap)
+ goto error;
+ }
+
+ if (orig->coaddr) {
+ x->coaddr = kmemdup(orig->coaddr, sizeof(*x->coaddr),
+ GFP_KERNEL);
+ if (!x->coaddr)
+ goto error;
+ }
+
+ err = xfrm_init_state(x);
+ if (err)
+ goto error;
+
+ x->props.flags = orig->props.flags;
+
+ x->curlft.add_time = orig->curlft.add_time;
+ x->km.state = orig->km.state;
+ x->km.seq = orig->km.seq;
+
+ return x;
+
+ error:
+ if (errp)
+ *errp = err;
+ if (x) {
+ kfree(x->aalg);
+ kfree(x->ealg);
+ kfree(x->calg);
+ kfree(x->encap);
+ kfree(x->coaddr);
+ }
+ kfree(x);
+ return NULL;
+}
+
+/* xfrm_state_lock is held */
+struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m)
+{
+ unsigned int h;
+ struct xfrm_state *x;
+ struct hlist_node *entry;
+
+ if (m->reqid) {
+ h = xfrm_dst_hash(&m->old_daddr, &m->old_saddr,
+ m->reqid, m->old_family);
+ hlist_for_each_entry(x, entry, 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 (xfrm_addr_cmp(&x->id.daddr, &m->old_daddr,
+ m->old_family) ||
+ xfrm_addr_cmp(&x->props.saddr, &m->old_saddr,
+ m->old_family))
+ continue;
+ xfrm_state_hold(x);
+ return x;
+ }
+ } else {
+ h = xfrm_src_hash(&m->old_daddr, &m->old_saddr,
+ m->old_family);
+ hlist_for_each_entry(x, entry, xfrm_state_bysrc+h, bysrc) {
+ if (x->props.mode != m->mode ||
+ x->id.proto != m->proto)
+ continue;
+ if (xfrm_addr_cmp(&x->id.daddr, &m->old_daddr,
+ m->old_family) ||
+ xfrm_addr_cmp(&x->props.saddr, &m->old_saddr,
+ m->old_family))
+ continue;
+ xfrm_state_hold(x);
+ return x;
+ }
+ }
+
+ return NULL;
+}
+EXPORT_SYMBOL(xfrm_migrate_state_find);
+
+struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x,
+ struct xfrm_migrate *m)
+{
+ struct xfrm_state *xc;
+ int err;
+
+ xc = xfrm_state_clone(x, &err);
+ if (!xc)
+ return NULL;
+
+ 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_cmp(&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 ((err = xfrm_state_add(xc)) < 0)
+ goto error;
+ }
+
+ return xc;
+error:
+ kfree(xc);
+ return NULL;
+}
+EXPORT_SYMBOL(xfrm_state_migrate);
+#endif
+
int xfrm_state_update(struct xfrm_state *x)
{
struct xfrm_state *x1;
memcpy(&x1->lft, &x->lft, sizeof(x1->lft));
x1->km.dying = 0;
- if (!mod_timer(&x1->timer, jiffies + HZ))
- xfrm_state_hold(x1);
+ mod_timer(&x1->timer, jiffies + HZ);
if (x1->curlft.use_time)
xfrm_state_check_expire(x1);
int xfrm_state_check_expire(struct xfrm_state *x)
{
if (!x->curlft.use_time)
- x->curlft.use_time = (unsigned long)xtime.tv_sec;
+ x->curlft.use_time = get_seconds();
if (x->km.state != XFRM_STATE_VALID)
return -EINVAL;
if (x->curlft.bytes >= x->lft.hard_byte_limit ||
x->curlft.packets >= x->lft.hard_packet_limit) {
x->km.state = XFRM_STATE_EXPIRED;
- if (!mod_timer(&x->timer, jiffies))
- xfrm_state_hold(x);
+ mod_timer(&x->timer, jiffies);
return -EINVAL;
}
}
EXPORT_SYMBOL(xfrm_state_check_expire);
-static int xfrm_state_check_space(struct xfrm_state *x, struct sk_buff *skb)
-{
- int nhead = x->props.header_len + LL_RESERVED_SPACE(skb->dst->dev)
- - skb_headroom(skb);
-
- if (nhead > 0)
- return pskb_expand_head(skb, nhead, 0, GFP_ATOMIC);
-
- /* Check tail too... */
- return 0;
-}
-
-int xfrm_state_check(struct xfrm_state *x, struct sk_buff *skb)
-{
- int err = xfrm_state_check_expire(x);
- if (err < 0)
- goto err;
- err = xfrm_state_check_space(x, skb);
-err:
- return err;
-}
-EXPORT_SYMBOL(xfrm_state_check);
-
struct xfrm_state *
-xfrm_state_lookup(xfrm_address_t *daddr, u32 spi, u8 proto,
+xfrm_state_lookup(xfrm_address_t *daddr, __be32 spi, u8 proto,
unsigned short family)
{
struct xfrm_state *x;
EXPORT_SYMBOL(xfrm_state_lookup_byaddr);
struct xfrm_state *
-xfrm_find_acq(u8 mode, u32 reqid, u8 proto,
- xfrm_address_t *daddr, xfrm_address_t *saddr,
+xfrm_find_acq(u8 mode, u32 reqid, u8 proto,
+ xfrm_address_t *daddr, xfrm_address_t *saddr,
int create, unsigned short family)
{
struct xfrm_state *x;
{
int i;
- for (i = 0; i < XFRM_DST_HSIZE; i++) {
+ for (i = 0; i <= xfrm_state_hmask; i++) {
struct hlist_node *entry;
struct xfrm_state *x;
}
EXPORT_SYMBOL(xfrm_get_acqseq);
-void
-xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi)
+int xfrm_alloc_spi(struct xfrm_state *x, u32 low, u32 high)
{
- u32 h;
+ unsigned int h;
struct xfrm_state *x0;
+ int err = -ENOENT;
+ __be32 minspi = htonl(low);
+ __be32 maxspi = htonl(high);
+ spin_lock_bh(&x->lock);
+ if (x->km.state == XFRM_STATE_DEAD)
+ goto unlock;
+
+ err = 0;
if (x->id.spi)
- return;
+ goto unlock;
+
+ err = -ENOENT;
if (minspi == maxspi) {
x0 = xfrm_state_lookup(&x->id.daddr, minspi, x->id.proto, x->props.family);
if (x0) {
xfrm_state_put(x0);
- return;
+ goto unlock;
}
x->id.spi = minspi;
} else {
u32 spi = 0;
- minspi = ntohl(minspi);
- maxspi = ntohl(maxspi);
- for (h=0; h<maxspi-minspi+1; h++) {
- spi = minspi + net_random()%(maxspi-minspi+1);
+ for (h=0; h<high-low+1; h++) {
+ spi = low + net_random()%(high-low+1);
x0 = xfrm_state_lookup(&x->id.daddr, htonl(spi), x->id.proto, x->props.family);
if (x0 == NULL) {
x->id.spi = htonl(spi);
spin_lock_bh(&xfrm_state_lock);
h = xfrm_spi_hash(&x->id.daddr, x->id.spi, x->id.proto, x->props.family);
hlist_add_head(&x->byspi, xfrm_state_byspi+h);
- xfrm_state_hold(x);
spin_unlock_bh(&xfrm_state_lock);
- wake_up(&km_waitq);
+
+ err = 0;
}
+
+unlock:
+ spin_unlock_bh(&x->lock);
+
+ return err;
}
EXPORT_SYMBOL(xfrm_alloc_spi);
void *data)
{
int i;
- struct xfrm_state *x;
+ struct xfrm_state *x, *last = NULL;
struct hlist_node *entry;
int count = 0;
int err = 0;
spin_lock_bh(&xfrm_state_lock);
- for (i = 0; i < XFRM_DST_HSIZE; i++) {
+ for (i = 0; i <= xfrm_state_hmask; i++) {
hlist_for_each_entry(x, entry, xfrm_state_bydst+i, bydst) {
- if (xfrm_id_proto_match(x->id.proto, proto))
- count++;
+ if (!xfrm_id_proto_match(x->id.proto, proto))
+ continue;
+ if (last) {
+ err = func(last, count, data);
+ if (err)
+ goto out;
+ }
+ last = x;
+ count++;
}
}
if (count == 0) {
err = -ENOENT;
goto out;
}
-
- for (i = 0; i < XFRM_DST_HSIZE; i++) {
- hlist_for_each_entry(x, entry, xfrm_state_bydst+i, bydst) {
- if (!xfrm_id_proto_match(x->id.proto, proto))
- continue;
- err = func(x, --count, data);
- if (err)
- goto out;
- }
- }
+ err = func(last, 0, data);
out:
spin_unlock_bh(&xfrm_state_lock);
return err;
km_state_notify(x, &c);
if (x->replay_maxage &&
- !mod_timer(&x->rtimer, jiffies + x->replay_maxage)) {
- xfrm_state_hold(x);
+ !mod_timer(&x->rtimer, jiffies + x->replay_maxage))
x->xflags &= ~XFRM_TIME_DEFER;
- }
}
-EXPORT_SYMBOL(xfrm_replay_notify);
static void xfrm_replay_timer_handler(unsigned long data)
{
}
spin_unlock(&x->lock);
- xfrm_state_put(x);
}
-int xfrm_replay_check(struct xfrm_state *x, u32 seq)
+int xfrm_replay_check(struct xfrm_state *x,
+ struct sk_buff *skb, __be32 net_seq)
{
u32 diff;
-
- seq = ntohl(seq);
+ u32 seq = ntohl(net_seq);
if (unlikely(seq == 0))
- return -EINVAL;
+ goto err;
if (likely(seq > x->replay.seq))
return 0;
diff = x->replay.seq - seq;
- if (diff >= x->props.replay_window) {
+ if (diff >= min_t(unsigned int, x->props.replay_window,
+ sizeof(x->replay.bitmap) * 8)) {
x->stats.replay_window++;
- return -EINVAL;
+ goto err;
}
if (x->replay.bitmap & (1U << diff)) {
x->stats.replay++;
- return -EINVAL;
+ goto err;
}
return 0;
+
+err:
+ xfrm_audit_state_replay(x, skb, net_seq);
+ return -EINVAL;
}
-EXPORT_SYMBOL(xfrm_replay_check);
-void xfrm_replay_advance(struct xfrm_state *x, u32 seq)
+void xfrm_replay_advance(struct xfrm_state *x, __be32 net_seq)
{
u32 diff;
-
- seq = ntohl(seq);
+ u32 seq = ntohl(net_seq);
if (seq > x->replay.seq) {
diff = seq - x->replay.seq;
if (xfrm_aevent_is_on())
xfrm_replay_notify(x, XFRM_REPLAY_UPDATE);
}
-EXPORT_SYMBOL(xfrm_replay_advance);
-static struct list_head xfrm_km_list = LIST_HEAD_INIT(xfrm_km_list);
+static LIST_HEAD(xfrm_km_list);
static DEFINE_RWLOCK(xfrm_km_lock);
void km_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
}
EXPORT_SYMBOL(km_query);
-int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, u16 sport)
+int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
{
int err = -EINVAL;
struct xfrm_mgr *km;
}
EXPORT_SYMBOL(km_policy_expired);
+#ifdef CONFIG_XFRM_MIGRATE
+int km_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
+ struct xfrm_migrate *m, int num_migrate)
+{
+ int err = -EINVAL;
+ int ret;
+ struct xfrm_mgr *km;
+
+ read_lock(&xfrm_km_lock);
+ list_for_each_entry(km, &xfrm_km_list, list) {
+ if (km->migrate) {
+ ret = km->migrate(sel, dir, type, m, num_migrate);
+ if (!ret)
+ err = ret;
+ }
+ }
+ read_unlock(&xfrm_km_lock);
+ return err;
+}
+EXPORT_SYMBOL(km_migrate);
+#endif
+
int km_report(u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr)
{
int err = -EINVAL;
}
EXPORT_SYMBOL(xfrm_state_unregister_afinfo);
-static struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned short family)
+static struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family)
{
struct xfrm_state_afinfo *afinfo;
if (unlikely(family >= NPROTO))
}
static void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo)
+ __releases(xfrm_state_afinfo_lock)
{
read_unlock(&xfrm_state_afinfo_lock);
}
}
EXPORT_SYMBOL(xfrm_state_delete_tunnel);
-/*
- * This function is NOT optimal. For example, with ESP it will give an
- * MTU that's usually two bytes short of being optimal. However, it will
- * usually give an answer that's a multiple of 4 provided the input is
- * also a multiple of 4.
- */
int xfrm_state_mtu(struct xfrm_state *x, int mtu)
{
- int res = mtu;
-
- res -= x->props.header_len;
-
- for (;;) {
- int m = res;
-
- if (m < 68)
- return 68;
-
- spin_lock_bh(&x->lock);
- if (x->km.state == XFRM_STATE_VALID &&
- x->type && x->type->get_max_size)
- m = x->type->get_max_size(x, m);
- else
- m += x->props.header_len;
- spin_unlock_bh(&x->lock);
-
- if (m <= mtu)
- break;
- res -= (m - mtu);
- }
+ int res;
+ spin_lock_bh(&x->lock);
+ if (x->km.state == XFRM_STATE_VALID &&
+ x->type && x->type->get_mtu)
+ res = x->type->get_mtu(x, mtu);
+ else
+ res = mtu - x->props.header_len;
+ spin_unlock_bh(&x->lock);
return res;
}
int xfrm_init_state(struct xfrm_state *x)
{
struct xfrm_state_afinfo *afinfo;
+ struct xfrm_mode *inner_mode;
int family = x->props.family;
int err;
goto error;
err = -EPROTONOSUPPORT;
+
+ if (x->sel.family != AF_UNSPEC) {
+ inner_mode = xfrm_get_mode(x->props.mode, x->sel.family);
+ if (inner_mode == NULL)
+ goto error;
+
+ if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL) &&
+ family != x->sel.family) {
+ xfrm_put_mode(inner_mode);
+ goto error;
+ }
+
+ x->inner_mode = inner_mode;
+ } else {
+ struct xfrm_mode *inner_mode_iaf;
+
+ inner_mode = xfrm_get_mode(x->props.mode, AF_INET);
+ if (inner_mode == NULL)
+ goto error;
+
+ if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL)) {
+ xfrm_put_mode(inner_mode);
+ goto error;
+ }
+
+ inner_mode_iaf = xfrm_get_mode(x->props.mode, AF_INET6);
+ if (inner_mode_iaf == NULL)
+ goto error;
+
+ if (!(inner_mode_iaf->flags & XFRM_MODE_FLAG_TUNNEL)) {
+ xfrm_put_mode(inner_mode_iaf);
+ goto error;
+ }
+
+ if (x->props.family == AF_INET) {
+ x->inner_mode = inner_mode;
+ x->inner_mode_iaf = inner_mode_iaf;
+ } else {
+ x->inner_mode = inner_mode_iaf;
+ x->inner_mode_iaf = inner_mode;
+ }
+ }
+
x->type = xfrm_get_type(x->id.proto, family);
if (x->type == NULL)
goto error;
if (err)
goto error;
- x->mode = xfrm_get_mode(x->props.mode, family);
- if (x->mode == NULL)
+ x->outer_mode = xfrm_get_mode(x->props.mode, family);
+ if (x->outer_mode == NULL)
goto error;
x->km.state = XFRM_STATE_VALID;
}
EXPORT_SYMBOL(xfrm_init_state);
-
+
void __init xfrm_state_init(void)
{
- int i;
+ unsigned int sz;
- for (i=0; i<XFRM_DST_HSIZE; i++) {
- INIT_HLIST_HEAD(&xfrm_state_bydst[i]);
- INIT_HLIST_HEAD(&xfrm_state_bysrc[i]);
- INIT_HLIST_HEAD(&xfrm_state_byspi[i]);
+ sz = sizeof(struct hlist_head) * 8;
+
+ xfrm_state_bydst = xfrm_hash_alloc(sz);
+ xfrm_state_bysrc = xfrm_hash_alloc(sz);
+ xfrm_state_byspi = xfrm_hash_alloc(sz);
+ if (!xfrm_state_bydst || !xfrm_state_bysrc || !xfrm_state_byspi)
+ panic("XFRM: Cannot allocate bydst/bysrc/byspi hashes.");
+ xfrm_state_hmask = ((sz / sizeof(struct hlist_head)) - 1);
+
+ INIT_WORK(&xfrm_state_gc_work, xfrm_state_gc_task);
+}
+
+#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=" NIPQUAD_FMT " dst=" NIPQUAD_FMT,
+ NIPQUAD(x->props.saddr.a4),
+ NIPQUAD(x->id.daddr.a4));
+ break;
+ case AF_INET6:
+ audit_log_format(audit_buf,
+ " src=" NIP6_FMT " dst=" NIP6_FMT,
+ NIP6(*(struct in6_addr *)x->props.saddr.a6),
+ NIP6(*(struct in6_addr *)x->id.daddr.a6));
+ break;
}
- INIT_WORK(&xfrm_state_gc_work, xfrm_state_gc_task, NULL);
+
+ 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)
+{
+ struct iphdr *iph4;
+ struct ipv6hdr *iph6;
+
+ switch (family) {
+ case AF_INET:
+ iph4 = ip_hdr(skb);
+ audit_log_format(audit_buf,
+ " src=" NIPQUAD_FMT " dst=" NIPQUAD_FMT,
+ NIPQUAD(iph4->saddr),
+ NIPQUAD(iph4->daddr));
+ break;
+ case AF_INET6:
+ iph6 = ipv6_hdr(skb);
+ audit_log_format(audit_buf,
+ " src=" NIP6_FMT " dst=" NIP6_FMT
+ " flowlbl=0x%x%x%x",
+ NIP6(iph6->saddr),
+ NIP6(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,
+ u32 auid, u32 secid)
+{
+ struct audit_buffer *audit_buf;
+
+ audit_buf = xfrm_audit_start("SAD-add");
+ if (audit_buf == NULL)
+ return;
+ xfrm_audit_helper_usrinfo(auid, secid, 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,
+ u32 auid, u32 secid)
+{
+ struct audit_buffer *audit_buf;
+
+ audit_buf = xfrm_audit_start("SAD-delete");
+ if (audit_buf == NULL)
+ return;
+ xfrm_audit_helper_usrinfo(auid, secid, 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);
+
+static 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);
+}
+
+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 */
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff