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-rw-r--r--net/xfrm/xfrm_policy.c111
-rw-r--r--net/xfrm/xfrm_state.c109
-rw-r--r--net/xfrm/xfrm_user.c4
3 files changed, 97 insertions, 127 deletions
diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c
index ef9ccbc3875..b7ec08025ff 100644
--- a/net/xfrm/xfrm_policy.c
+++ b/net/xfrm/xfrm_policy.c
@@ -46,7 +46,7 @@ EXPORT_SYMBOL(xfrm_cfg_mutex);
static DEFINE_RWLOCK(xfrm_policy_lock);
-static struct list_head xfrm_policy_bytype[XFRM_POLICY_TYPE_MAX];
+static struct list_head xfrm_policy_all;
unsigned int xfrm_policy_count[XFRM_POLICY_MAX*2];
EXPORT_SYMBOL(xfrm_policy_count);
@@ -164,7 +164,7 @@ static void xfrm_policy_timer(unsigned long data)
read_lock(&xp->lock);
- if (xp->dead)
+ if (xp->walk.dead)
goto out;
dir = xfrm_policy_id2dir(xp->index);
@@ -236,7 +236,7 @@ struct xfrm_policy *xfrm_policy_alloc(gfp_t gfp)
policy = kzalloc(sizeof(struct xfrm_policy), gfp);
if (policy) {
- INIT_LIST_HEAD(&policy->bytype);
+ INIT_LIST_HEAD(&policy->walk.all);
INIT_HLIST_NODE(&policy->bydst);
INIT_HLIST_NODE(&policy->byidx);
rwlock_init(&policy->lock);
@@ -252,17 +252,13 @@ EXPORT_SYMBOL(xfrm_policy_alloc);
void xfrm_policy_destroy(struct xfrm_policy *policy)
{
- BUG_ON(!policy->dead);
+ BUG_ON(!policy->walk.dead);
BUG_ON(policy->bundles);
if (del_timer(&policy->timer))
BUG();
- write_lock_bh(&xfrm_policy_lock);
- list_del(&policy->bytype);
- write_unlock_bh(&xfrm_policy_lock);
-
security_xfrm_policy_free(policy->security);
kfree(policy);
}
@@ -310,8 +306,8 @@ static void xfrm_policy_kill(struct xfrm_policy *policy)
int dead;
write_lock_bh(&policy->lock);
- dead = policy->dead;
- policy->dead = 1;
+ dead = policy->walk.dead;
+ policy->walk.dead = 1;
write_unlock_bh(&policy->lock);
if (unlikely(dead)) {
@@ -609,6 +605,7 @@ int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl)
if (delpol) {
hlist_del(&delpol->bydst);
hlist_del(&delpol->byidx);
+ list_del(&delpol->walk.all);
xfrm_policy_count[dir]--;
}
policy->index = delpol ? delpol->index : xfrm_gen_index(policy->type, dir);
@@ -617,7 +614,7 @@ int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl)
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]);
+ list_add(&policy->walk.all, &xfrm_policy_all);
write_unlock_bh(&xfrm_policy_lock);
if (delpol)
@@ -684,6 +681,7 @@ struct xfrm_policy *xfrm_policy_bysel_ctx(u8 type, int dir,
}
hlist_del(&pol->bydst);
hlist_del(&pol->byidx);
+ list_del(&pol->walk.all);
xfrm_policy_count[dir]--;
}
ret = pol;
@@ -727,6 +725,7 @@ struct xfrm_policy *xfrm_policy_byid(u8 type, int dir, u32 id, int delete,
}
hlist_del(&pol->bydst);
hlist_del(&pol->byidx);
+ list_del(&pol->walk.all);
xfrm_policy_count[dir]--;
}
ret = pol;
@@ -840,6 +839,7 @@ int xfrm_policy_flush(u8 type, struct xfrm_audit *audit_info)
continue;
hlist_del(&pol->bydst);
hlist_del(&pol->byidx);
+ list_del(&pol->walk.all);
write_unlock_bh(&xfrm_policy_lock);
xfrm_audit_policy_delete(pol, 1,
@@ -867,60 +867,68 @@ int xfrm_policy_walk(struct xfrm_policy_walk *walk,
int (*func)(struct xfrm_policy *, int, int, void*),
void *data)
{
- struct xfrm_policy *old, *pol, *last = NULL;
+ struct xfrm_policy *pol;
+ struct xfrm_policy_walk_entry *x;
int error = 0;
if (walk->type >= XFRM_POLICY_TYPE_MAX &&
walk->type != XFRM_POLICY_TYPE_ANY)
return -EINVAL;
- if (walk->policy == NULL && walk->count != 0)
+ if (list_empty(&walk->walk.all) && walk->seq != 0)
return 0;
- old = pol = walk->policy;
- walk->policy = NULL;
- read_lock_bh(&xfrm_policy_lock);
-
- for (; walk->cur_type < XFRM_POLICY_TYPE_MAX; walk->cur_type++) {
- if (walk->type != walk->cur_type &&
- walk->type != XFRM_POLICY_TYPE_ANY)
+ write_lock_bh(&xfrm_policy_lock);
+ if (list_empty(&walk->walk.all))
+ x = list_first_entry(&xfrm_policy_all, struct xfrm_policy_walk_entry, all);
+ else
+ x = list_entry(&walk->walk.all, struct xfrm_policy_walk_entry, all);
+ list_for_each_entry_from(x, &xfrm_policy_all, all) {
+ if (x->dead)
continue;
-
- 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, xfrm_policy_id2dir(last->index),
- walk->count, data);
- if (error) {
- xfrm_pol_hold(last);
- walk->policy = last;
- goto out;
- }
- }
- last = pol;
- walk->count++;
+ pol = container_of(x, struct xfrm_policy, walk);
+ if (walk->type != XFRM_POLICY_TYPE_ANY &&
+ walk->type != pol->type)
+ continue;
+ error = func(pol, xfrm_policy_id2dir(pol->index),
+ walk->seq, data);
+ if (error) {
+ list_move_tail(&walk->walk.all, &x->all);
+ goto out;
}
- pol = NULL;
+ walk->seq++;
}
- if (walk->count == 0) {
+ if (walk->seq == 0) {
error = -ENOENT;
goto out;
}
- if (last)
- error = func(last, xfrm_policy_id2dir(last->index), 0, data);
+ list_del_init(&walk->walk.all);
out:
- read_unlock_bh(&xfrm_policy_lock);
- if (old != NULL)
- xfrm_pol_put(old);
+ write_unlock_bh(&xfrm_policy_lock);
return error;
}
EXPORT_SYMBOL(xfrm_policy_walk);
+void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type)
+{
+ INIT_LIST_HEAD(&walk->walk.all);
+ walk->walk.dead = 1;
+ walk->type = type;
+ walk->seq = 0;
+}
+EXPORT_SYMBOL(xfrm_policy_walk_init);
+
+void xfrm_policy_walk_done(struct xfrm_policy_walk *walk)
+{
+ if (list_empty(&walk->walk.all))
+ return;
+
+ write_lock_bh(&xfrm_policy_lock);
+ list_del(&walk->walk.all);
+ write_unlock_bh(&xfrm_policy_lock);
+}
+EXPORT_SYMBOL(xfrm_policy_walk_done);
+
/*
* Find policy to apply to this flow.
*
@@ -1077,7 +1085,7 @@ static void __xfrm_policy_link(struct xfrm_policy *pol, int dir)
struct hlist_head *chain = policy_hash_bysel(&pol->selector,
pol->family, dir);
- list_add_tail(&pol->bytype, &xfrm_policy_bytype[pol->type]);
+ list_add(&pol->walk.all, &xfrm_policy_all);
hlist_add_head(&pol->bydst, chain);
hlist_add_head(&pol->byidx, xfrm_policy_byidx+idx_hash(pol->index));
xfrm_policy_count[dir]++;
@@ -1095,6 +1103,7 @@ static struct xfrm_policy *__xfrm_policy_unlink(struct xfrm_policy *pol,
hlist_del(&pol->bydst);
hlist_del(&pol->byidx);
+ list_del(&pol->walk.all);
xfrm_policy_count[dir]--;
return pol;
@@ -1720,7 +1729,7 @@ restart:
for (pi = 0; pi < npols; pi++) {
read_lock_bh(&pols[pi]->lock);
- pol_dead |= pols[pi]->dead;
+ pol_dead |= pols[pi]->walk.dead;
read_unlock_bh(&pols[pi]->lock);
}
@@ -2415,9 +2424,7 @@ static void __init xfrm_policy_init(void)
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_LIST_HEAD(&xfrm_policy_all);
INIT_WORK(&xfrm_policy_gc_work, xfrm_policy_gc_task);
register_netdevice_notifier(&xfrm_dev_notifier);
}
@@ -2601,7 +2608,7 @@ static int xfrm_policy_migrate(struct xfrm_policy *pol,
int i, j, n = 0;
write_lock_bh(&pol->lock);
- if (unlikely(pol->dead)) {
+ if (unlikely(pol->walk.dead)) {
/* target policy has been deleted */
write_unlock_bh(&pol->lock);
return -ENOENT;
diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c
index 053970e8765..747fd8c291a 100644
--- a/net/xfrm/xfrm_state.c
+++ b/net/xfrm/xfrm_state.c
@@ -59,14 +59,6 @@ static unsigned int xfrm_state_hashmax __read_mostly = 1 * 1024 * 1024;
static unsigned int xfrm_state_num;
static unsigned int xfrm_state_genid;
-/* Counter indicating ongoing walk, protected by xfrm_state_lock. */
-static unsigned long xfrm_state_walk_ongoing;
-/* Counter indicating walk completion, protected by xfrm_cfg_mutex. */
-static unsigned long xfrm_state_walk_completed;
-
-/* List of outstanding state walks used to set the completed counter. */
-static LIST_HEAD(xfrm_state_walks);
-
static struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family);
static void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo);
@@ -199,8 +191,7 @@ static DEFINE_RWLOCK(xfrm_state_afinfo_lock);
static struct xfrm_state_afinfo *xfrm_state_afinfo[NPROTO];
static struct work_struct xfrm_state_gc_work;
-static LIST_HEAD(xfrm_state_gc_leftovers);
-static LIST_HEAD(xfrm_state_gc_list);
+static HLIST_HEAD(xfrm_state_gc_list);
static DEFINE_SPINLOCK(xfrm_state_gc_lock);
int __xfrm_state_delete(struct xfrm_state *x);
@@ -412,23 +403,16 @@ static void xfrm_state_gc_destroy(struct xfrm_state *x)
static void xfrm_state_gc_task(struct work_struct *data)
{
- struct xfrm_state *x, *tmp;
- unsigned long completed;
+ struct xfrm_state *x;
+ struct hlist_node *entry, *tmp;
+ struct hlist_head gc_list;
- mutex_lock(&xfrm_cfg_mutex);
spin_lock_bh(&xfrm_state_gc_lock);
- list_splice_tail_init(&xfrm_state_gc_list, &xfrm_state_gc_leftovers);
+ hlist_move_list(&xfrm_state_gc_list, &gc_list);
spin_unlock_bh(&xfrm_state_gc_lock);
- completed = xfrm_state_walk_completed;
- mutex_unlock(&xfrm_cfg_mutex);
-
- list_for_each_entry_safe(x, tmp, &xfrm_state_gc_leftovers, gclist) {
- if ((long)(x->lastused - completed) > 0)
- break;
- list_del(&x->gclist);
+ hlist_for_each_entry_safe(x, entry, tmp, &gc_list, gclist)
xfrm_state_gc_destroy(x);
- }
wake_up(&km_waitq);
}
@@ -529,7 +513,7 @@ struct xfrm_state *xfrm_state_alloc(void)
if (x) {
atomic_set(&x->refcnt, 1);
atomic_set(&x->tunnel_users, 0);
- INIT_LIST_HEAD(&x->all);
+ INIT_LIST_HEAD(&x->km.all);
INIT_HLIST_NODE(&x->bydst);
INIT_HLIST_NODE(&x->bysrc);
INIT_HLIST_NODE(&x->byspi);
@@ -556,7 +540,7 @@ void __xfrm_state_destroy(struct xfrm_state *x)
WARN_ON(x->km.state != XFRM_STATE_DEAD);
spin_lock_bh(&xfrm_state_gc_lock);
- list_add_tail(&x->gclist, &xfrm_state_gc_list);
+ hlist_add_head(&x->gclist, &xfrm_state_gc_list);
spin_unlock_bh(&xfrm_state_gc_lock);
schedule_work(&xfrm_state_gc_work);
}
@@ -569,8 +553,7 @@ int __xfrm_state_delete(struct xfrm_state *x)
if (x->km.state != XFRM_STATE_DEAD) {
x->km.state = XFRM_STATE_DEAD;
spin_lock(&xfrm_state_lock);
- x->lastused = xfrm_state_walk_ongoing;
- list_del_rcu(&x->all);
+ list_del(&x->km.all);
hlist_del(&x->bydst);
hlist_del(&x->bysrc);
if (x->id.spi)
@@ -871,7 +854,7 @@ xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t *saddr,
if (km_query(x, tmpl, pol) == 0) {
x->km.state = XFRM_STATE_ACQ;
- list_add_tail(&x->all, &xfrm_state_all);
+ list_add(&x->km.all, &xfrm_state_all);
hlist_add_head(&x->bydst, xfrm_state_bydst+h);
h = xfrm_src_hash(daddr, saddr, family);
hlist_add_head(&x->bysrc, xfrm_state_bysrc+h);
@@ -940,7 +923,7 @@ static void __xfrm_state_insert(struct xfrm_state *x)
x->genid = ++xfrm_state_genid;
- list_add_tail(&x->all, &xfrm_state_all);
+ list_add(&x->km.all, &xfrm_state_all);
h = xfrm_dst_hash(&x->id.daddr, &x->props.saddr,
x->props.reqid, x->props.family);
@@ -1069,7 +1052,7 @@ static struct xfrm_state *__find_acq_core(unsigned short family, u8 mode, u32 re
xfrm_state_hold(x);
x->timer.expires = jiffies + sysctl_xfrm_acq_expires*HZ;
add_timer(&x->timer);
- list_add_tail(&x->all, &xfrm_state_all);
+ list_add(&x->km.all, &xfrm_state_all);
hlist_add_head(&x->bydst, xfrm_state_bydst+h);
h = xfrm_src_hash(daddr, saddr, family);
hlist_add_head(&x->bysrc, xfrm_state_bysrc+h);
@@ -1566,79 +1549,59 @@ int xfrm_state_walk(struct xfrm_state_walk *walk,
int (*func)(struct xfrm_state *, int, void*),
void *data)
{
- struct xfrm_state *old, *x, *last = NULL;
+ struct xfrm_state *state;
+ struct xfrm_state_walk *x;
int err = 0;
- if (walk->state == NULL && walk->count != 0)
+ if (walk->seq != 0 && list_empty(&walk->all))
return 0;
- old = x = walk->state;
- walk->state = NULL;
spin_lock_bh(&xfrm_state_lock);
- if (x == NULL)
- x = list_first_entry(&xfrm_state_all, struct xfrm_state, all);
+ if (list_empty(&walk->all))
+ x = list_first_entry(&xfrm_state_all, struct xfrm_state_walk, all);
+ else
+ x = list_entry(&walk->all, struct xfrm_state_walk, all);
list_for_each_entry_from(x, &xfrm_state_all, all) {
- if (x->km.state == XFRM_STATE_DEAD)
+ if (x->state == XFRM_STATE_DEAD)
continue;
- if (!xfrm_id_proto_match(x->id.proto, walk->proto))
+ state = container_of(x, struct xfrm_state, km);
+ if (!xfrm_id_proto_match(state->id.proto, walk->proto))
continue;
- if (last) {
- err = func(last, walk->count, data);
- if (err) {
- xfrm_state_hold(last);
- walk->state = last;
- goto out;
- }
+ err = func(state, walk->seq, data);
+ if (err) {
+ list_move_tail(&walk->all, &x->all);
+ goto out;
}
- last = x;
- walk->count++;
+ walk->seq++;
}
- if (walk->count == 0) {
+ if (walk->seq == 0) {
err = -ENOENT;
goto out;
}
- if (last)
- err = func(last, 0, data);
+ list_del_init(&walk->all);
out:
spin_unlock_bh(&xfrm_state_lock);
- if (old != NULL)
- xfrm_state_put(old);
return err;
}
EXPORT_SYMBOL(xfrm_state_walk);
void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto)
{
+ INIT_LIST_HEAD(&walk->all);
walk->proto = proto;
- walk->state = NULL;
- walk->count = 0;
- list_add_tail(&walk->list, &xfrm_state_walks);
- walk->genid = ++xfrm_state_walk_ongoing;
+ walk->state = XFRM_STATE_DEAD;
+ walk->seq = 0;
}
EXPORT_SYMBOL(xfrm_state_walk_init);
void xfrm_state_walk_done(struct xfrm_state_walk *walk)
{
- struct list_head *prev;
-
- if (walk->state != NULL) {
- xfrm_state_put(walk->state);
- walk->state = NULL;
- }
-
- prev = walk->list.prev;
- list_del(&walk->list);
-
- if (prev != &xfrm_state_walks) {
- list_entry(prev, struct xfrm_state_walk, list)->genid =
- walk->genid;
+ if (list_empty(&walk->all))
return;
- }
-
- xfrm_state_walk_completed = walk->genid;
- if (!list_empty(&xfrm_state_gc_leftovers))
- schedule_work(&xfrm_state_gc_work);
+ spin_lock_bh(&xfrm_state_lock);
+ list_del(&walk->all);
+ spin_lock_bh(&xfrm_state_lock);
}
EXPORT_SYMBOL(xfrm_state_walk_done);
diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c
index 04c41504f84..76f75df21e1 100644
--- a/net/xfrm/xfrm_user.c
+++ b/net/xfrm/xfrm_user.c
@@ -1102,7 +1102,7 @@ static struct xfrm_policy *xfrm_policy_construct(struct xfrm_userpolicy_info *p,
return xp;
error:
*errp = err;
- xp->dead = 1;
+ xp->walk.dead = 1;
xfrm_policy_destroy(xp);
return NULL;
}
@@ -1595,7 +1595,7 @@ static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
return -ENOENT;
read_lock(&xp->lock);
- if (xp->dead) {
+ if (xp->walk.dead) {
read_unlock(&xp->lock);
goto out;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-29 18:39:52 +0000