#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_lock);
+static struct list_head xfrm_policy_bytype[XFRM_POLICY_TYPE_MAX];
unsigned int xfrm_policy_count[XFRM_POLICY_MAX*2];
EXPORT_SYMBOL(xfrm_policy_count);
return 0;
}
+static inline struct dst_entry *__xfrm_dst_lookup(int tos,
+ xfrm_address_t *saddr,
+ xfrm_address_t *daddr,
+ int family)
+{
+ struct xfrm_policy_afinfo *afinfo;
+ struct dst_entry *dst;
+
+ afinfo = xfrm_policy_get_afinfo(family);
+ if (unlikely(afinfo == NULL))
+ return ERR_PTR(-EAFNOSUPPORT);
+
+ dst = afinfo->dst_lookup(tos, saddr, daddr);
+
+ xfrm_policy_put_afinfo(afinfo);
+
+ return dst;
+}
+
static inline struct dst_entry *xfrm_dst_lookup(struct xfrm_state *x, int tos,
+ xfrm_address_t *prev_saddr,
+ xfrm_address_t *prev_daddr,
int family)
{
xfrm_address_t *saddr = &x->props.saddr;
xfrm_address_t *daddr = &x->id.daddr;
- struct xfrm_policy_afinfo *afinfo;
struct dst_entry *dst;
- if (x->type->flags & XFRM_TYPE_LOCAL_COADDR)
+ if (x->type->flags & XFRM_TYPE_LOCAL_COADDR) {
saddr = x->coaddr;
- if (x->type->flags & XFRM_TYPE_REMOTE_COADDR)
+ daddr = prev_daddr;
+ }
+ if (x->type->flags & XFRM_TYPE_REMOTE_COADDR) {
+ saddr = prev_saddr;
daddr = x->coaddr;
+ }
- afinfo = xfrm_policy_get_afinfo(family);
- if (unlikely(afinfo == NULL))
- return ERR_PTR(-EAFNOSUPPORT);
+ dst = __xfrm_dst_lookup(tos, saddr, daddr, family);
+
+ if (!IS_ERR(dst)) {
+ if (prev_saddr != saddr)
+ memcpy(prev_saddr, saddr, sizeof(*prev_saddr));
+ if (prev_daddr != daddr)
+ memcpy(prev_daddr, daddr, sizeof(*prev_daddr));
+ }
- dst = afinfo->dst_lookup(tos, saddr, daddr);
- xfrm_policy_put_afinfo(afinfo);
return dst;
}
policy = kzalloc(sizeof(struct xfrm_policy), gfp);
if (policy) {
+ INIT_LIST_HEAD(&policy->bytype);
INIT_HLIST_NODE(&policy->bydst);
INIT_HLIST_NODE(&policy->byidx);
rwlock_init(&policy->lock);
/* Destroy xfrm_policy: descendant resources must be released to this moment. */
-void __xfrm_policy_destroy(struct xfrm_policy *policy)
+void xfrm_policy_destroy(struct xfrm_policy *policy)
{
BUG_ON(!policy->dead);
if (del_timer(&policy->timer))
BUG();
- security_xfrm_policy_free(policy);
+ write_lock_bh(&xfrm_policy_lock);
+ list_del(&policy->bytype);
+ write_unlock_bh(&xfrm_policy_lock);
+
+ security_xfrm_policy_free(policy->security);
kfree(policy);
}
-EXPORT_SYMBOL(__xfrm_policy_destroy);
+EXPORT_SYMBOL(xfrm_policy_destroy);
static void xfrm_policy_gc_kill(struct xfrm_policy *policy)
{
struct hlist_head *ndsttable,
unsigned int nhashmask)
{
- struct hlist_node *entry, *tmp;
+ struct hlist_node *entry, *tmp, *entry0 = NULL;
struct xfrm_policy *pol;
+ unsigned int h0 = 0;
+redo:
hlist_for_each_entry_safe(pol, entry, tmp, list, bydst) {
unsigned int h;
h = __addr_hash(&pol->selector.daddr, &pol->selector.saddr,
pol->family, nhashmask);
- hlist_add_head(&pol->bydst, ndsttable+h);
+ if (!entry0) {
+ hlist_del(entry);
+ hlist_add_head(&pol->bydst, ndsttable+h);
+ h0 = h;
+ } else {
+ if (h != h0)
+ continue;
+ hlist_del(entry);
+ hlist_add_after(entry0, &pol->bydst);
+ }
+ entry0 = entry;
+ }
+ if (!hlist_empty(list)) {
+ entry0 = NULL;
+ goto redo;
}
}
policy->curlft.use_time = 0;
if (!mod_timer(&policy->timer, jiffies + HZ))
xfrm_pol_hold(policy);
+ list_add_tail(&policy->bytype, &xfrm_policy_bytype[policy->type]);
write_unlock_bh(&xfrm_policy_lock);
if (delpol)
xfrm_sec_ctx_match(ctx, pol->security)) {
xfrm_pol_hold(pol);
if (delete) {
- *err = security_xfrm_policy_delete(pol);
+ *err = security_xfrm_policy_delete(
+ pol->security);
if (*err) {
write_unlock_bh(&xfrm_policy_lock);
return pol;
if (pol->type == type && pol->index == id) {
xfrm_pol_hold(pol);
if (delete) {
- *err = security_xfrm_policy_delete(pol);
+ *err = security_xfrm_policy_delete(
+ pol->security);
if (*err) {
write_unlock_bh(&xfrm_policy_lock);
return pol;
&xfrm_policy_inexact[dir], bydst) {
if (pol->type != type)
continue;
- err = security_xfrm_policy_delete(pol);
+ err = security_xfrm_policy_delete(pol->security);
if (err) {
xfrm_audit_policy_delete(pol, 0,
audit_info->loginuid,
+ audit_info->sessionid,
audit_info->secid);
return err;
}
bydst) {
if (pol->type != type)
continue;
- err = security_xfrm_policy_delete(pol);
+ err = security_xfrm_policy_delete(
+ pol->security);
if (err) {
xfrm_audit_policy_delete(pol, 0,
audit_info->loginuid,
+ audit_info->sessionid,
audit_info->secid);
return err;
}
write_unlock_bh(&xfrm_policy_lock);
xfrm_audit_policy_delete(pol, 1, audit_info->loginuid,
+ audit_info->sessionid,
audit_info->secid);
xfrm_policy_kill(pol);
xfrm_audit_policy_delete(pol, 1,
audit_info->loginuid,
+ audit_info->sessionid,
audit_info->secid);
xfrm_policy_kill(pol);
killed++;
}
EXPORT_SYMBOL(xfrm_policy_flush);
-int xfrm_policy_walk(u8 type, int (*func)(struct xfrm_policy *, int, int, void*),
+int xfrm_policy_walk(struct xfrm_policy_walk *walk,
+ int (*func)(struct xfrm_policy *, int, int, void*),
void *data)
{
- struct xfrm_policy *pol, *last = NULL;
- struct hlist_node *entry;
- int dir, last_dir = 0, count, error;
+ struct xfrm_policy *old, *pol, *last = NULL;
+ int error = 0;
+
+ if (walk->type >= XFRM_POLICY_TYPE_MAX &&
+ walk->type != XFRM_POLICY_TYPE_ANY)
+ return -EINVAL;
+ if (walk->policy == NULL && walk->count != 0)
+ return 0;
+
+ old = pol = walk->policy;
+ walk->policy = NULL;
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;
+ for (; walk->cur_type < XFRM_POLICY_TYPE_MAX; walk->cur_type++) {
+ if (walk->type != walk->cur_type &&
+ walk->type != XFRM_POLICY_TYPE_ANY)
+ continue;
- hlist_for_each_entry(pol, entry,
- &xfrm_policy_inexact[dir], bydst) {
- if (pol->type != type)
+ if (pol == NULL) {
+ pol = list_first_entry(&xfrm_policy_bytype[walk->cur_type],
+ struct xfrm_policy, bytype);
+ }
+ list_for_each_entry_from(pol, &xfrm_policy_bytype[walk->cur_type], bytype) {
+ if (pol->dead)
continue;
if (last) {
- error = func(last, last_dir % XFRM_POLICY_MAX,
- count, data);
- if (error)
+ error = func(last, xfrm_policy_id2dir(last->index),
+ walk->count, data);
+ if (error) {
+ xfrm_pol_hold(last);
+ walk->policy = last;
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;
- if (last) {
- error = func(last, last_dir % XFRM_POLICY_MAX,
- count, data);
- if (error)
- goto out;
}
- last = pol;
- last_dir = dir;
- count++;
}
+ last = pol;
+ walk->count++;
}
+ pol = NULL;
}
- if (count == 0) {
+ if (walk->count == 0) {
error = -ENOENT;
goto out;
}
- error = func(last, last_dir % XFRM_POLICY_MAX, 0, data);
+ if (last)
+ error = func(last, xfrm_policy_id2dir(last->index), 0, data);
out:
read_unlock_bh(&xfrm_policy_lock);
+ if (old != NULL)
+ xfrm_pol_put(old);
return error;
}
EXPORT_SYMBOL(xfrm_policy_walk);
match = xfrm_selector_match(sel, fl, family);
if (match)
- ret = security_xfrm_policy_lookup(pol, fl->secid, dir);
+ ret = security_xfrm_policy_lookup(pol->security, fl->secid,
+ dir);
return ret;
}
int err = 0;
if (match) {
- err = security_xfrm_policy_lookup(pol, fl->secid,
- policy_to_flow_dir(dir));
+ err = security_xfrm_policy_lookup(pol->security,
+ fl->secid,
+ policy_to_flow_dir(dir));
if (!err)
xfrm_pol_hold(pol);
else if (err == -ESRCH)
struct hlist_head *chain = policy_hash_bysel(&pol->selector,
pol->family, dir);
+ list_add_tail(&pol->bytype, &xfrm_policy_bytype[pol->type]);
hlist_add_head(&pol->bydst, chain);
hlist_add_head(&pol->byidx, xfrm_policy_byidx+idx_hash(pol->index));
xfrm_policy_count[dir]++;
if (newp) {
newp->selector = old->selector;
- if (security_xfrm_policy_clone(old, newp)) {
+ if (security_xfrm_policy_clone(old->security,
+ &newp->security)) {
kfree(newp);
return NULL; /* ENOMEM */
}
int trailer_len = 0;
int tos;
int family = policy->selector.family;
+ xfrm_address_t saddr, daddr;
+
+ xfrm_flowi_addr_get(fl, &saddr, &daddr, family);
tos = xfrm_get_tos(fl, family);
err = tos;
if (xfrm[i]->props.mode != XFRM_MODE_TRANSPORT) {
family = xfrm[i]->props.family;
- dst = xfrm_dst_lookup(xfrm[i], tos, family);
+ dst = xfrm_dst_lookup(xfrm[i], tos, &saddr, &daddr,
+ family);
err = PTR_ERR(dst);
if (IS_ERR(dst))
goto put_states;
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))
+ if (IS_ERR(policy)) {
+ XFRM_INC_STATS(LINUX_MIB_XFRMOUTPOLERROR);
goto dropdst;
+ }
}
if (!policy) {
policy = flow_cache_lookup(fl, dst_orig->ops->family,
dir, xfrm_policy_lookup);
err = PTR_ERR(policy);
- if (IS_ERR(policy))
+ if (IS_ERR(policy)) {
+ XFRM_INC_STATS(LINUX_MIB_XFRMOUTPOLERROR);
goto dropdst;
+ }
}
if (!policy)
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;
}
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;
}
/* EREMOTE tells the caller to generate
* a one-shot blackhole route.
*/
+ XFRM_INC_STATS(LINUX_MIB_XFRMOUTNOSTATES);
xfrm_pol_put(policy);
return -EREMOTE;
}
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. */
dst = xfrm_bundle_create(policy, xfrm, nx, fl, dst_orig);
err = PTR_ERR(dst);
- if (IS_ERR(dst))
+ if (IS_ERR(dst)) {
+ XFRM_INC_STATS(LINUX_MIB_XFRMOUTBUNDLEGENERROR);
goto error;
+ }
for (pi = 0; pi < npols; pi++) {
read_lock_bh(&pols[pi]->lock);
* We can't enlist stable bundles either.
*/
write_unlock_bh(&policy->lock);
- if (dst)
- dst_free(dst);
+ dst_free(dst);
+ if (pol_dead)
+ XFRM_INC_STATS(LINUX_MIB_XFRMOUTPOLDEAD);
+ else
+ XFRM_INC_STATS(LINUX_MIB_XFRMOUTBUNDLECHECKERROR);
err = -EHOSTUNREACH;
goto error;
}
err = xfrm_dst_update_origin(dst, fl);
if (unlikely(err)) {
write_unlock_bh(&policy->lock);
- if (dst)
- dst_free(dst);
+ dst_free(dst);
+ XFRM_INC_STATS(LINUX_MIB_XFRMOUTBUNDLECHECKERROR);
goto error;
}
(x->id.spi == tmpl->id.spi || !tmpl->id.spi) &&
(x->props.reqid == tmpl->reqid || !tmpl->reqid) &&
x->props.mode == tmpl->mode &&
- ((tmpl->aalgos & (1<<x->props.aalgo)) ||
+ (tmpl->allalgs || (tmpl->aalgos & (1<<x->props.aalgo)) ||
!(xfrm_id_proto_match(tmpl->id.proto, IPSEC_PROTO_ANY))) &&
!(x->props.mode != XFRM_MODE_TRANSPORT &&
xfrm_state_addr_cmp(tmpl, x, family));
dir &= XFRM_POLICY_MASK;
fl_dir = policy_to_flow_dir(dir);
- if (__xfrm_decode_session(skb, &fl, family, reverse) < 0)
+ 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]) {
pol = xfrm_sk_policy_lookup(sk, dir, &fl);
- if (IS_ERR(pol))
+ 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))
+ 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;
&fl, family,
XFRM_POLICY_IN);
if (pols[1]) {
- if (IS_ERR(pols[1]))
+ 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;
}
void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev)
{
while ((dst = dst->child) && dst->xfrm && dst->dev == dev) {
- dst->dev = dev->nd_net->loopback_dev;
+ dst->dev = dev_net(dev)->loopback_dev;
dev_hold(dst->dev);
dev_put(dev);
}
{
struct net_device *dev = ptr;
- if (dev->nd_net != &init_net)
+ if (!net_eq(dev_net(dev), &init_net))
return NOTIFY_DONE;
switch (event) {
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;
panic("XFRM: failed to allocate bydst hash\n");
}
+ for (dir = 0; dir < XFRM_POLICY_TYPE_MAX; dir++)
+ INIT_LIST_HEAD(&xfrm_policy_bytype[dir]);
+
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)
+static void xfrm_audit_common_policyinfo(struct xfrm_policy *xp,
+ struct audit_buffer *audit_buf)
{
struct xfrm_sec_ctx *ctx = xp->security;
struct xfrm_selector *sel = &xp->selector;
}
}
-void
-xfrm_audit_policy_add(struct xfrm_policy *xp, int result, u32 auid, u32 sid)
+void xfrm_audit_policy_add(struct xfrm_policy *xp, int result,
+ uid_t auid, u32 sessionid, u32 secid)
{
struct audit_buffer *audit_buf;
- extern int audit_enabled;
- if (audit_enabled == 0)
- return;
- audit_buf = xfrm_audit_start(auid, sid);
+ audit_buf = xfrm_audit_start("SPD-add");
if (audit_buf == NULL)
return;
- audit_log_format(audit_buf, " op=SPD-add res=%u", result);
+ xfrm_audit_helper_usrinfo(auid, sessionid, 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 sid)
+void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
+ uid_t auid, u32 sessionid, u32 secid)
{
struct audit_buffer *audit_buf;
- extern int audit_enabled;
- if (audit_enabled == 0)
- return;
- audit_buf = xfrm_audit_start(auid, sid);
+ audit_buf = xfrm_audit_start("SPD-delete");
if (audit_buf == NULL)
return;
- audit_log_format(audit_buf, " op=SPD-delete res=%u", result);
+ xfrm_audit_helper_usrinfo(auid, sessionid, secid, audit_buf);
+ audit_log_format(audit_buf, " res=%u", result);
xfrm_audit_common_policyinfo(xp, audit_buf);
audit_log_end(audit_buf);
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff