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-rw-r--r--src/compat/compat.h106
1 files changed, 53 insertions, 53 deletions
diff --git a/src/compat/compat.h b/src/compat/compat.h
index c6e1e50..9e92236 100644
--- a/src/compat/compat.h
+++ b/src/compat/compat.h
@@ -318,6 +318,59 @@ static inline int wait_for_random_bytes(void)
return 0;
}
#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 19, 0) && LINUX_VERSION_CODE >= KERNEL_VERSION(4, 2, 0)
+#include <linux/random.h>
+#include <linux/slab.h>
+struct rng_is_initialized_callback {
+ struct random_ready_callback cb;
+ atomic_t *rng_state;
+};
+static inline void rng_is_initialized_callback(struct random_ready_callback *cb)
+{
+ struct rng_is_initialized_callback *rdy = container_of(cb, struct rng_is_initialized_callback, cb);
+ atomic_set(rdy->rng_state, 2);
+ kfree(rdy);
+}
+static inline bool rng_is_initialized(void)
+{
+ static atomic_t rng_state = ATOMIC_INIT(0);
+
+ if (atomic_read(&rng_state) == 2)
+ return true;
+
+ if (atomic_cmpxchg(&rng_state, 0, 1) == 0) {
+ int ret;
+ struct rng_is_initialized_callback *rdy = kmalloc(sizeof(*rdy), GFP_ATOMIC);
+ if (!rdy) {
+ atomic_set(&rng_state, 0);
+ return false;
+ }
+ rdy->cb.owner = THIS_MODULE;
+ rdy->cb.func = rng_is_initialized_callback;
+ rdy->rng_state = &rng_state;
+ ret = add_random_ready_callback(&rdy->cb);
+ if (ret)
+ kfree(rdy);
+ if (ret == -EALREADY) {
+ atomic_set(&rng_state, 2);
+ return true;
+ } else if (ret)
+ atomic_set(&rng_state, 0);
+ return false;
+ }
+ return false;
+}
+#elif LINUX_VERSION_CODE < KERNEL_VERSION(4, 2, 0)
+/* This is a disaster. Without this API, we really have no way of
+ * knowing if it's initialized. We just return that it has and hope
+ * for the best... */
+static inline bool rng_is_initialized(void)
+{
+ return true;
+}
+#endif
+
#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 13, 0) && !defined(ISOPENSUSE15)
static inline int get_random_bytes_wait(void *buf, int nbytes)
{
@@ -667,59 +720,6 @@ static inline void new_icmpv6_send(struct sk_buff *skb, u8 type, u8 code, __u32
#define icmpv6_send(a,b,c,d) new_icmpv6_send(a,b,c,d)
#endif
-/* https://lkml.kernel.org/r/20180618234347.13282-1-Jason@zx2c4.com */
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 2, 0)
-#include <linux/random.h>
-#include <linux/slab.h>
-struct rng_is_initialized_callback {
- struct random_ready_callback cb;
- atomic_t *rng_state;
-};
-static inline void rng_is_initialized_callback(struct random_ready_callback *cb)
-{
- struct rng_is_initialized_callback *rdy = container_of(cb, struct rng_is_initialized_callback, cb);
- atomic_set(rdy->rng_state, 2);
- kfree(rdy);
-}
-static inline bool rng_is_initialized(void)
-{
- static atomic_t rng_state = ATOMIC_INIT(0);
-
- if (atomic_read(&rng_state) == 2)
- return true;
-
- if (atomic_cmpxchg(&rng_state, 0, 1) == 0) {
- int ret;
- struct rng_is_initialized_callback *rdy = kmalloc(sizeof(*rdy), GFP_ATOMIC);
- if (!rdy) {
- atomic_set(&rng_state, 0);
- return false;
- }
- rdy->cb.owner = THIS_MODULE;
- rdy->cb.func = rng_is_initialized_callback;
- rdy->rng_state = &rng_state;
- ret = add_random_ready_callback(&rdy->cb);
- if (ret)
- kfree(rdy);
- if (ret == -EALREADY) {
- atomic_set(&rng_state, 2);
- return true;
- } else if (ret)
- atomic_set(&rng_state, 0);
- return false;
- }
- return false;
-}
-#else
-/* This is a disaster. Without this API, we really have no way of
- * knowing if it's initialized. We just return that it has and hope
- * for the best... */
-static inline bool rng_is_initialized(void)
-{
- return true;
-}
-#endif
-
/* PaX compatibility */
#ifdef CONSTIFY_PLUGIN
#include <linux/cache.h>