diff options
| -rw-r--r-- | include/net/xfrm.h | 9 | ||||
| -rw-r--r-- | net/ipv4/xfrm4_policy.c | 6 | ||||
| -rw-r--r-- | net/ipv4/xfrm4_state.c | 1 | ||||
| -rw-r--r-- | net/ipv6/xfrm6_policy.c | 6 | ||||
| -rw-r--r-- | net/ipv6/xfrm6_state.c | 1 | ||||
| -rw-r--r-- | net/xfrm/xfrm_policy.c | 58 | ||||
| -rw-r--r-- | net/xfrm/xfrm_state.c | 9 |
7 files changed, 38 insertions, 52 deletions
diff --git a/include/net/xfrm.h b/include/net/xfrm.h index afa508d..ed7c974 100644 --- a/include/net/xfrm.h +++ b/include/net/xfrm.h @@ -204,8 +204,7 @@ struct xfrm_type; struct xfrm_dst; struct xfrm_policy_afinfo { unsigned short family; - rwlock_t lock; - struct xfrm_type_map *type_map; + struct xfrm_type *type_map[256]; struct dst_ops *dst_ops; void (*garbage_collect)(void); int (*dst_lookup)(struct xfrm_dst **dst, struct flowi *fl); @@ -232,7 +231,6 @@ extern int __xfrm_state_delete(struct xfrm_state *x); struct xfrm_state_afinfo { unsigned short family; - rwlock_t lock; struct list_head *state_bydst; struct list_head *state_byspi; int (*init_flags)(struct xfrm_state *x); @@ -264,11 +262,6 @@ struct xfrm_type u32 (*get_max_size)(struct xfrm_state *, int size); }; -struct xfrm_type_map { - rwlock_t lock; - struct xfrm_type *map[256]; -}; - extern int xfrm_register_type(struct xfrm_type *type, unsigned short family); extern int xfrm_unregister_type(struct xfrm_type *type, unsigned short family); extern struct xfrm_type *xfrm_get_type(u8 proto, unsigned short family); diff --git a/net/ipv4/xfrm4_policy.c b/net/ipv4/xfrm4_policy.c index 8604c74..c046528 100644 --- a/net/ipv4/xfrm4_policy.c +++ b/net/ipv4/xfrm4_policy.c @@ -17,8 +17,6 @@ static struct dst_ops xfrm4_dst_ops; static struct xfrm_policy_afinfo xfrm4_policy_afinfo; -static struct xfrm_type_map xfrm4_type_map = { .lock = RW_LOCK_UNLOCKED }; - static int xfrm4_dst_lookup(struct xfrm_dst **dst, struct flowi *fl) { return __ip_route_output_key((struct rtable**)dst, fl); @@ -237,9 +235,7 @@ _decode_session4(struct sk_buff *skb, struct flowi *fl) static inline int xfrm4_garbage_collect(void) { - read_lock(&xfrm4_policy_afinfo.lock); xfrm4_policy_afinfo.garbage_collect(); - read_unlock(&xfrm4_policy_afinfo.lock); return (atomic_read(&xfrm4_dst_ops.entries) > xfrm4_dst_ops.gc_thresh*2); } @@ -299,8 +295,6 @@ static struct dst_ops xfrm4_dst_ops = { static struct xfrm_policy_afinfo xfrm4_policy_afinfo = { .family = AF_INET, - .lock = RW_LOCK_UNLOCKED, - .type_map = &xfrm4_type_map, .dst_ops = &xfrm4_dst_ops, .dst_lookup = xfrm4_dst_lookup, .find_bundle = __xfrm4_find_bundle, diff --git a/net/ipv4/xfrm4_state.c b/net/ipv4/xfrm4_state.c index dbabf81..81e1751 100644 --- a/net/ipv4/xfrm4_state.c +++ b/net/ipv4/xfrm4_state.c @@ -131,7 +131,6 @@ __xfrm4_find_acq(u8 mode, u32 reqid, u8 proto, static struct xfrm_state_afinfo xfrm4_state_afinfo = { .family = AF_INET, - .lock = RW_LOCK_UNLOCKED, .init_flags = xfrm4_init_flags, .init_tempsel = __xfrm4_init_tempsel, .state_lookup = __xfrm4_state_lookup, diff --git a/net/ipv6/xfrm6_policy.c b/net/ipv6/xfrm6_policy.c index 88c840f..ee715f2 100644 --- a/net/ipv6/xfrm6_policy.c +++ b/net/ipv6/xfrm6_policy.c @@ -23,8 +23,6 @@ static struct dst_ops xfrm6_dst_ops; static struct xfrm_policy_afinfo xfrm6_policy_afinfo; -static struct xfrm_type_map xfrm6_type_map = { .lock = RW_LOCK_UNLOCKED }; - static int xfrm6_dst_lookup(struct xfrm_dst **dst, struct flowi *fl) { int err = 0; @@ -249,9 +247,7 @@ _decode_session6(struct sk_buff *skb, struct flowi *fl) static inline int xfrm6_garbage_collect(void) { - read_lock(&xfrm6_policy_afinfo.lock); xfrm6_policy_afinfo.garbage_collect(); - read_unlock(&xfrm6_policy_afinfo.lock); return (atomic_read(&xfrm6_dst_ops.entries) > xfrm6_dst_ops.gc_thresh*2); } @@ -311,8 +307,6 @@ static struct dst_ops xfrm6_dst_ops = { static struct xfrm_policy_afinfo xfrm6_policy_afinfo = { .family = AF_INET6, - .lock = RW_LOCK_UNLOCKED, - .type_map = &xfrm6_type_map, .dst_ops = &xfrm6_dst_ops, .dst_lookup = xfrm6_dst_lookup, .find_bundle = __xfrm6_find_bundle, diff --git a/net/ipv6/xfrm6_state.c b/net/ipv6/xfrm6_state.c index a572302..b33296b 100644 --- a/net/ipv6/xfrm6_state.c +++ b/net/ipv6/xfrm6_state.c @@ -135,7 +135,6 @@ __xfrm6_find_acq(u8 mode, u32 reqid, u8 proto, static struct xfrm_state_afinfo xfrm6_state_afinfo = { .family = AF_INET6, - .lock = RW_LOCK_UNLOCKED, .init_tempsel = __xfrm6_init_tempsel, .state_lookup = __xfrm6_state_lookup, .find_acq = __xfrm6_find_acq, diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c index b469c8b..44b64a5 100644 --- a/net/xfrm/xfrm_policy.c +++ b/net/xfrm/xfrm_policy.c @@ -46,45 +46,43 @@ static DEFINE_SPINLOCK(xfrm_policy_gc_lock); 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); int xfrm_register_type(struct xfrm_type *type, unsigned short family) { - struct xfrm_policy_afinfo *afinfo = xfrm_policy_get_afinfo(family); - struct xfrm_type_map *typemap; + 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; - write_lock_bh(&typemap->lock); - if (likely(typemap->map[type->proto] == NULL)) - typemap->map[type->proto] = type; + if (likely(typemap[type->proto] == NULL)) + typemap[type->proto] = type; else err = -EEXIST; - write_unlock_bh(&typemap->lock); - xfrm_policy_put_afinfo(afinfo); + xfrm_policy_unlock_afinfo(afinfo); return err; } EXPORT_SYMBOL(xfrm_register_type); int xfrm_unregister_type(struct xfrm_type *type, unsigned short family) { - struct xfrm_policy_afinfo *afinfo = xfrm_policy_get_afinfo(family); - struct xfrm_type_map *typemap; + 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; - write_lock_bh(&typemap->lock); - if (unlikely(typemap->map[type->proto] != type)) + if (unlikely(typemap[type->proto] != type)) err = -ENOENT; else - typemap->map[type->proto] = NULL; - write_unlock_bh(&typemap->lock); - xfrm_policy_put_afinfo(afinfo); + typemap[type->proto] = NULL; + xfrm_policy_unlock_afinfo(afinfo); return err; } EXPORT_SYMBOL(xfrm_unregister_type); @@ -92,7 +90,7 @@ EXPORT_SYMBOL(xfrm_unregister_type); struct xfrm_type *xfrm_get_type(u8 proto, unsigned short family) { struct xfrm_policy_afinfo *afinfo; - struct xfrm_type_map *typemap; + struct xfrm_type **typemap; struct xfrm_type *type; int modload_attempted = 0; @@ -102,11 +100,9 @@ retry: return NULL; typemap = afinfo->type_map; - read_lock(&typemap->lock); - type = typemap->map[proto]; + type = typemap[proto]; if (unlikely(type && !try_module_get(type->owner))) type = NULL; - read_unlock(&typemap->lock); if (!type && !modload_attempted) { xfrm_policy_put_afinfo(afinfo); request_module("xfrm-type-%d-%d", @@ -1306,17 +1302,31 @@ static struct xfrm_policy_afinfo *xfrm_policy_get_afinfo(unsigned short family) return NULL; read_lock(&xfrm_policy_afinfo_lock); afinfo = xfrm_policy_afinfo[family]; - if (likely(afinfo != NULL)) - read_lock(&afinfo->lock); - read_unlock(&xfrm_policy_afinfo_lock); + if (unlikely(!afinfo)) + read_unlock(&xfrm_policy_afinfo_lock); return afinfo; } static void xfrm_policy_put_afinfo(struct xfrm_policy_afinfo *afinfo) { - if (unlikely(afinfo == NULL)) - return; - read_unlock(&afinfo->lock); + read_unlock(&xfrm_policy_afinfo_lock); +} + +static struct xfrm_policy_afinfo *xfrm_policy_lock_afinfo(unsigned int family) +{ + 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; +} + +static void xfrm_policy_unlock_afinfo(struct xfrm_policy_afinfo *afinfo) +{ + write_unlock_bh(&xfrm_policy_afinfo_lock); } static int xfrm_dev_event(struct notifier_block *this, unsigned long event, void *ptr) diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c index 93a2f36..ee62c23 100644 --- a/net/xfrm/xfrm_state.c +++ b/net/xfrm/xfrm_state.c @@ -1103,17 +1103,14 @@ static struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned short family) return NULL; read_lock(&xfrm_state_afinfo_lock); afinfo = xfrm_state_afinfo[family]; - if (likely(afinfo != NULL)) - read_lock(&afinfo->lock); - read_unlock(&xfrm_state_afinfo_lock); + if (unlikely(!afinfo)) + read_unlock(&xfrm_state_afinfo_lock); return afinfo; } static void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo) { - if (unlikely(afinfo == NULL)) - return; - read_unlock(&afinfo->lock); + read_unlock(&xfrm_state_afinfo_lock); } /* Temporarily located here until net/xfrm/xfrm_tunnel.c is created */ |