ipsec: IPSec protection for multi-point tunnel interfaces

[vpp.git] / src / svm / ssvm.h

diff --git a/src/svm/ssvm.h b/src/svm/ssvm.h
index bccfc16..6225a63 100644 (file)
--- a/src/svm/ssvm.h
+++ b/src/svm/ssvm.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015 Cisco and/or its affiliates.
+ * Copyright (c) 2015-2019 Cisco and/or its affiliates.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at:
@@ -37,6 +37,7 @@
 #include <vppinfra/heap.h>
 #include <vppinfra/pool.h>
 #include <vppinfra/format.h>
+#include <vppinfra/lock.h>
 
 #ifndef MMAP_PAGESIZE
 #define MMAP_PAGESIZE (clib_mem_get_page_size())
@@ -44,6 +45,14 @@
 
 #define SSVM_N_OPAQUE 7
 
+typedef enum ssvm_segment_type_
+{
+  SSVM_SEGMENT_SHM = 0,
+  SSVM_SEGMENT_MEMFD,
+  SSVM_SEGMENT_PRIVATE,
+  SSVM_N_SEGMENT_TYPES         /**< Private segments */
+} ssvm_segment_type_t;
+
 typedef struct
 {
   /* Spin-lock */
@@ -56,9 +65,9 @@ typedef struct
   void *heap;
 
   /* Segment must be mapped at this address, or no supper */
-  u64 ssvm_va;
+  uword ssvm_va;
   /* The actual mmap size */
-  u64 ssvm_size;
+  uword ssvm_size;
   u32 master_pid;
   u32 slave_pid;
   u8 *name;
@@ -67,21 +76,24 @@ typedef struct
   /* Set when the master application thinks it's time to make the donuts */
   volatile u32 ready;
 
-  /* Needed to make unique MAC addresses, etc. */
-  u32 master_index;
+  ssvm_segment_type_t type;
 } ssvm_shared_header_t;
 
 typedef struct
 {
   ssvm_shared_header_t *sh;
-  u64 ssvm_size;
+  uword ssvm_size;
+  uword requested_va;
   u32 my_pid;
-  u32 vlib_hw_if_index;
   u8 *name;
-  uword requested_va;
+  u8 numa;                     /**< Numa requested at alloc time */
   int i_am_master;
-  u32 per_interface_next_index;
-  u32 *rx_queue;
+
+  union
+  {
+    int fd;                    /**< memfd segments */
+    int attach_timeout;                /**< shm segments attach timeout (sec) */
+  };
 } ssvm_private_t;
 
 always_inline void
@@ -93,14 +105,23 @@ ssvm_lock (ssvm_shared_header_t * h, u32 my_pid, u32 tag)
       return;
     }
 
-  while (__sync_lock_test_and_set (&h->lock, 1))
-    ;
+  while (clib_atomic_test_and_set (&h->lock))
+    CLIB_PAUSE ();
 
   h->owner_pid = my_pid;
   h->recursion_count = 1;
   h->tag = tag;
 }
 
+always_inline void
+ssvm_lock_non_recursive (ssvm_shared_header_t * h, u32 tag)
+{
+  while (clib_atomic_test_and_set (&h->lock))
+    CLIB_PAUSE ();
+
+  h->tag = tag;
+}
+
 always_inline void
 ssvm_unlock (ssvm_shared_header_t * h)
 {
@@ -108,11 +129,17 @@ ssvm_unlock (ssvm_shared_header_t * h)
     {
       h->owner_pid = 0;
       h->tag = 0;
-      CLIB_MEMORY_BARRIER ();
-      h->lock = 0;
+      clib_atomic_release (&h->lock);
     }
 }
 
+always_inline void
+ssvm_unlock_non_recursive (ssvm_shared_header_t * h)
+{
+  h->tag = 0;
+  clib_atomic_release (&h->lock);
+}
+
 static inline void *
 ssvm_push_heap (ssvm_shared_header_t * sh)
 {
@@ -127,6 +154,18 @@ ssvm_pop_heap (void *oldheap)
   clib_mem_set_heap (oldheap);
 }
 
+static inline void *
+ssvm_mem_alloc (ssvm_private_t * ssvm, uword size)
+{
+  u8 *oldheap;
+  void *rv;
+
+  oldheap = clib_mem_set_heap (ssvm->sh->heap);
+  rv = clib_mem_alloc (size);
+  clib_mem_set_heap (oldheap);
+  return (rv);
+}
+
 #define foreach_ssvm_api_error                  \
 _(NO_NAME, "No shared segment name", -100)      \
 _(NO_SIZE, "Size not set (master)", -101)       \
@@ -144,10 +183,25 @@ typedef enum
 
 #define SSVM_API_ERROR_NO_NAME (-10)
 
-int ssvm_master_init (ssvm_private_t * ssvm, u32 master_index);
-int ssvm_slave_init (ssvm_private_t * ssvm, int timeout_in_seconds);
+int ssvm_master_init (ssvm_private_t * ssvm, ssvm_segment_type_t type);
+int ssvm_slave_init (ssvm_private_t * ssvm, ssvm_segment_type_t type);
 void ssvm_delete (ssvm_private_t * ssvm);
 
+int ssvm_master_init_shm (ssvm_private_t * ssvm);
+int ssvm_slave_init_shm (ssvm_private_t * ssvm);
+void ssvm_delete_shm (ssvm_private_t * ssvm);
+
+int ssvm_master_init_memfd (ssvm_private_t * memfd);
+int ssvm_slave_init_memfd (ssvm_private_t * memfd);
+void ssvm_delete_memfd (ssvm_private_t * memfd);
+
+int ssvm_master_init_private (ssvm_private_t * ssvm);
+int ssvm_slave_init_private (ssvm_private_t * ssvm);
+void ssvm_delete_private (ssvm_private_t * ssvm);
+
+ssvm_segment_type_t ssvm_type (const ssvm_private_t * ssvm);
+u8 *ssvm_name (const ssvm_private_t * ssvm);
+
 #endif /* __included_ssvm_h__ */
 
 /*