diff options
Diffstat (limited to 'net/xfrm/xfrm_state.c')
| -rw-r--r-- | net/xfrm/xfrm_state.c | 118 |
1 files changed, 93 insertions, 25 deletions
diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c index d11747c..9d206c2 100644 --- a/net/xfrm/xfrm_state.c +++ b/net/xfrm/xfrm_state.c @@ -50,7 +50,7 @@ static DEFINE_SPINLOCK(xfrm_state_gc_lock); static int xfrm_state_gc_flush_bundles; -static void __xfrm_state_delete(struct xfrm_state *x); +static 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); @@ -154,6 +154,7 @@ static void xfrm_timer_handler(unsigned long data) next = tmo; } + x->km.dying = warn; if (warn) km_state_expired(x, 0); resched: @@ -169,9 +170,8 @@ expired: next = 2; goto resched; } - if (x->id.spi != 0) + if (!__xfrm_state_delete(x) && x->id.spi) km_state_expired(x, 1); - __xfrm_state_delete(x); out: spin_unlock(&x->lock); @@ -215,8 +215,10 @@ void __xfrm_state_destroy(struct xfrm_state *x) } EXPORT_SYMBOL(__xfrm_state_destroy); -static void __xfrm_state_delete(struct xfrm_state *x) +static int __xfrm_state_delete(struct xfrm_state *x) { + int err = -ESRCH; + if (x->km.state != XFRM_STATE_DEAD) { x->km.state = XFRM_STATE_DEAD; spin_lock(&xfrm_state_lock); @@ -245,14 +247,21 @@ static void __xfrm_state_delete(struct xfrm_state *x) * is what we are dropping here. */ atomic_dec(&x->refcnt); + err = 0; } + + return err; } -void xfrm_state_delete(struct xfrm_state *x) +int xfrm_state_delete(struct xfrm_state *x) { + int err; + spin_lock_bh(&x->lock); - __xfrm_state_delete(x); + err = __xfrm_state_delete(x); spin_unlock_bh(&x->lock); + + return err; } EXPORT_SYMBOL(xfrm_state_delete); @@ -557,16 +566,18 @@ int xfrm_state_check_expire(struct xfrm_state *x) if (x->curlft.bytes >= x->lft.hard_byte_limit || x->curlft.packets >= x->lft.hard_packet_limit) { - km_state_expired(x, 1); - if (!mod_timer(&x->timer, jiffies + XFRM_ACQ_EXPIRES*HZ)) + x->km.state = XFRM_STATE_EXPIRED; + if (!mod_timer(&x->timer, jiffies)) xfrm_state_hold(x); return -EINVAL; } if (!x->km.dying && (x->curlft.bytes >= x->lft.soft_byte_limit || - x->curlft.packets >= x->lft.soft_packet_limit)) + x->curlft.packets >= x->lft.soft_packet_limit)) { + x->km.dying = 1; km_state_expired(x, 0); + } return 0; } EXPORT_SYMBOL(xfrm_state_check_expire); @@ -796,34 +807,56 @@ EXPORT_SYMBOL(xfrm_replay_advance); static struct list_head xfrm_km_list = LIST_HEAD_INIT(xfrm_km_list); static DEFINE_RWLOCK(xfrm_km_lock); -static void km_state_expired(struct xfrm_state *x, int hard) +void km_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c) { struct xfrm_mgr *km; - if (hard) - x->km.state = XFRM_STATE_EXPIRED; - else - x->km.dying = 1; + read_lock(&xfrm_km_lock); + list_for_each_entry(km, &xfrm_km_list, list) + if (km->notify_policy) + km->notify_policy(xp, dir, c); + read_unlock(&xfrm_km_lock); +} +void km_state_notify(struct xfrm_state *x, struct km_event *c) +{ + struct xfrm_mgr *km; read_lock(&xfrm_km_lock); list_for_each_entry(km, &xfrm_km_list, list) - km->notify(x, hard); + if (km->notify) + km->notify(x, c); read_unlock(&xfrm_km_lock); +} + +EXPORT_SYMBOL(km_policy_notify); +EXPORT_SYMBOL(km_state_notify); + +static void km_state_expired(struct xfrm_state *x, int hard) +{ + struct km_event c; + + c.data.hard = hard; + c.event = XFRM_MSG_EXPIRE; + km_state_notify(x, &c); if (hard) wake_up(&km_waitq); } +/* + * We send to all registered managers regardless of failure + * We are happy with one success +*/ static int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol) { - int err = -EINVAL; + int err = -EINVAL, acqret; struct xfrm_mgr *km; read_lock(&xfrm_km_lock); list_for_each_entry(km, &xfrm_km_list, list) { - err = km->acquire(x, t, pol, XFRM_POLICY_OUT); - if (!err) - break; + acqret = km->acquire(x, t, pol, XFRM_POLICY_OUT); + if (!acqret) + err = acqret; } read_unlock(&xfrm_km_lock); return err; @@ -848,13 +881,11 @@ EXPORT_SYMBOL(km_new_mapping); void km_policy_expired(struct xfrm_policy *pol, int dir, int hard) { - struct xfrm_mgr *km; + struct km_event c; - read_lock(&xfrm_km_lock); - list_for_each_entry(km, &xfrm_km_list, list) - if (km->notify_policy) - km->notify_policy(pol, dir, hard); - read_unlock(&xfrm_km_lock); + c.data.hard = hard; + c.event = XFRM_MSG_POLEXPIRE; + km_policy_notify(pol, dir, &c); if (hard) wake_up(&km_waitq); @@ -1024,6 +1055,43 @@ int xfrm_state_mtu(struct xfrm_state *x, int mtu) } EXPORT_SYMBOL(xfrm_state_mtu); + +int xfrm_init_state(struct xfrm_state *x) +{ + struct xfrm_state_afinfo *afinfo; + int family = x->props.family; + int err; + + err = -EAFNOSUPPORT; + afinfo = xfrm_state_get_afinfo(family); + if (!afinfo) + goto error; + + err = 0; + if (afinfo->init_flags) + err = afinfo->init_flags(x); + + xfrm_state_put_afinfo(afinfo); + + if (err) + goto error; + + err = -EPROTONOSUPPORT; + x->type = xfrm_get_type(x->id.proto, family); + if (x->type == NULL) + goto error; + + err = x->type->init_state(x); + if (err) + goto error; + + x->km.state = XFRM_STATE_VALID; + +error: + return err; +} + +EXPORT_SYMBOL(xfrm_init_state); void __init xfrm_state_init(void) { |
