session: add support for memfd segments

[vpp.git] / src / vppinfra / mem.h

diff --git a/src/vppinfra/mem.h b/src/vppinfra/mem.h
index 69ab880..028289c 100644 (file)
--- a/src/vppinfra/mem.h
+++ b/src/vppinfra/mem.h
@@ -330,7 +330,7 @@ typedef struct
 #define CLIB_MEM_VM_F_HUGETLB_PREALLOC (1 << 4)
   u32 flags; /**< vm allocation flags:
                 <br> CLIB_MEM_VM_F_SHARED: request shared memory, file
-               destiptor will be provided on successful allocation.
+               descriptor will be provided on successful allocation.
                 <br> CLIB_MEM_VM_F_HUGETLB: request hugepages.
                <br> CLIB_MEM_VM_F_NUMA_PREFER: numa_node field contains valid
                numa node preference.
@@ -342,15 +342,27 @@ typedef struct
   uword size; /**< Allocation size, set by caller. */
   int numa_node; /**< numa node preference. Valid if CLIB_MEM_VM_F_NUMA_PREFER set. */
   void *addr; /**< Pointer to allocated memory, set on successful allocation. */
-  int fd; /**< File desriptor, set on successful allocation if CLIB_MEM_VM_F_SHARED is set. */
+  int fd; /**< File descriptor, set on successful allocation if CLIB_MEM_VM_F_SHARED is set. */
   int log2_page_size;          /* Page size in log2 format, set on successful allocation. */
   int n_pages;                 /* Number of pages. */
+  uword requested_va;          /**< Request fixed position mapping */
 } clib_mem_vm_alloc_t;
 
 clib_error_t *clib_mem_vm_ext_alloc (clib_mem_vm_alloc_t * a);
+u64 clib_mem_vm_get_page_size (int fd);
 int clib_mem_vm_get_log2_page_size (int fd);
 u64 *clib_mem_vm_get_paddr (void *mem, int log2_page_size, int n_pages);
 
+typedef struct
+{
+  uword size;          /**< Map size */
+  int fd;              /**< File descriptor to be mapped */
+  uword requested_va;  /**< Request fixed position mapping */
+  void *addr;          /**< Pointer to mapped memory, if successful */
+} clib_mem_vm_map_t;
+
+clib_error_t *clib_mem_vm_ext_map (clib_mem_vm_map_t * a);
+void clib_mem_vm_randomize_va (uword * requested_va, u32 log2_page_size);
 
 #include <vppinfra/error.h>    /* clib_panic */