IMFS: Add root directory to FS info

Fix memory leak in IMFS_fsunmount().

cpukit/libfs/src/imfs/imfs.h

@@ -375,6 +375,7 @@ static inline void IMFS_mtime_ctime_update( IMFS_jnode_t *jnode )
 }
 
 typedef struct {
+  IMFS_directory_t Root_directory;
   const IMFS_mknod_control *mknod_controls[ IMFS_TYPE_COUNT ];
 } IMFS_fs_info_t;
 
@@ -562,14 +563,9 @@ extern int IMFS_mknod(
   dev_t dev
 );
 
-/**
- * @brief Create a new IMFS node.
- * 
- * Routine to create a new in memory file system node.
- */
-extern IMFS_jnode_t *IMFS_allocate_node(
+extern IMFS_jnode_t *IMFS_initialize_node(
+  IMFS_jnode_t *node,
   const IMFS_node_control *node_control,
-  size_t node_size,
   const char *name,
   size_t namelen,
   mode_t mode,

cpukit/libfs/src/imfs/imfs_creat.c

@@ -22,69 +22,6 @@
 #include <stdlib.h>
 #include <string.h>
 
-IMFS_jnode_t *IMFS_allocate_node(
-  const IMFS_node_control *node_control,
-  size_t node_size,
-  const char *name,
-  size_t namelen,
-  mode_t mode,
-  void *arg
-)
-{
-  IMFS_jnode_t        *node;
-  IMFS_jnode_t        *initialized_node;
-  struct timeval       tv;
-
-  if ( namelen > IMFS_NAME_MAX ) {
-    errno = ENAMETOOLONG;
-
-    return NULL;
-  }
-
-  gettimeofday( &tv, 0 );
-
-  /*
-   *  Allocate an IMFS jnode
-   */
-  node = calloc( 1, node_size );
-  if ( !node ) {
-    errno = ENOMEM;
-
-    return NULL;
-  }
-
-  /*
-   *  Fill in the basic information
-   */
-  node->reference_count = 1;
-  node->st_nlink = 1;
-  memcpy( node->name, name, namelen );
-  node->name [namelen] = '\0';
-  node->control = node_control;
-
-  /*
-   *  Fill in the mode and permission information for the jnode structure.
-   */
-  node->st_mode = mode;
-  node->st_uid = geteuid();
-  node->st_gid = getegid();
-
-  /*
-   *  Now set all the times.
-   */
-
-  node->stat_atime  = (time_t) tv.tv_sec;
-  node->stat_mtime  = (time_t) tv.tv_sec;
-  node->stat_ctime  = (time_t) tv.tv_sec;
-
-  initialized_node = (*node->control->node_initialize)( node, arg );
-  if ( initialized_node == NULL ) {
-    free( node );
-  }
-
-  return initialized_node;
-}
-
 IMFS_jnode_t *IMFS_create_node(
   const rtems_filesystem_location_info_t *parentloc,
   const IMFS_node_control *node_control,
@@ -95,15 +32,24 @@ IMFS_jnode_t *IMFS_create_node(
   void *arg
 )
 {
-  IMFS_jnode_t *node = IMFS_allocate_node(
+  IMFS_jnode_t *allocated_node;
+  IMFS_jnode_t *node;
+
+  allocated_node = calloc( 1, node_size );
+  if ( allocated_node == NULL ) {
+    errno = ENOMEM;
+
+    return NULL;
+  }
+
+  node = IMFS_initialize_node(
+    allocated_node,
     node_control,
-    node_size,
     name,
     namelen,
     mode,
     arg
   );
-
   if ( node != NULL ) {
     IMFS_jnode_t *parent = parentloc->node_access;
 
@@ -112,6 +58,8 @@ IMFS_jnode_t *IMFS_create_node(
      */
     IMFS_assert( parent != NULL );
     IMFS_add_to_directory( parent, node );
+  } else {
+    free( allocated_node );
   }
 
   return node;

cpukit/libfs/src/imfs/imfs_fsunmount.c

@@ -49,12 +49,6 @@ void IMFS_fsunmount(
    loc = temp_mt_entry->mt_fs_root->location;
    jnode = (IMFS_jnode_t *)loc.node_access;
 
-   /*
-    *  Set this to null to indicate that it is being unmounted.
-    */
-
-   temp_mt_entry->mt_fs_root->location.node_access = NULL;
-
    do {
      next = jnode->Parent;
      loc.node_access = (void *)jnode;

cpukit/libfs/src/imfs/imfs_initsupp.c

@@ -23,6 +23,7 @@
 #include <errno.h>
 #include <stdlib.h>
 #include <string.h>
+#include <unistd.h>
 
 /*
  *  IMFS_determine_bytes_per_block
@@ -55,6 +56,52 @@ static int IMFS_determine_bytes_per_block(
   return 0;
 }
 
+IMFS_jnode_t *IMFS_initialize_node(
+  IMFS_jnode_t *node,
+  const IMFS_node_control *node_control,
+  const char *name,
+  size_t namelen,
+  mode_t mode,
+  void *arg
+)
+{
+  struct timeval tv;
+
+  if ( namelen > IMFS_NAME_MAX ) {
+    errno = ENAMETOOLONG;
+
+    return NULL;
+  }
+
+  gettimeofday( &tv, 0 );
+
+  /*
+   *  Fill in the basic information
+   */
+  node->reference_count = 1;
+  node->st_nlink = 1;
+  memcpy( node->name, name, namelen );
+  node->name [namelen] = '\0';
+  node->control = node_control;
+
+  /*
+   *  Fill in the mode and permission information for the jnode structure.
+   */
+  node->st_mode = mode;
+  node->st_uid = geteuid();
+  node->st_gid = getegid();
+
+  /*
+   *  Now set all the times.
+   */
+
+  node->stat_atime  = (time_t) tv.tv_sec;
+  node->stat_mtime  = (time_t) tv.tv_sec;
+  node->stat_ctime  = (time_t) tv.tv_sec;
+
+  return (*node_control->node_initialize)( node, arg );
+}
+
 int IMFS_initialize_support(
   rtems_filesystem_mount_table_entry_t *mt_entry,
   const rtems_filesystem_operations_table *op_table,
@@ -73,25 +120,21 @@ int IMFS_initialize_support(
       sizeof( fs_info->mknod_controls )
     );
 
-    root_node = IMFS_allocate_node(
+    root_node = IMFS_initialize_node(
+      &fs_info->Root_directory.Node,
       &fs_info->mknod_controls[ IMFS_DIRECTORY ]->node_control,
-      fs_info->mknod_controls[ IMFS_DIRECTORY ]->node_size,
       "",
       0,
       (S_IFDIR | 0755),
       NULL
     );
-    if ( root_node != NULL ) {
-      mt_entry->fs_info = fs_info;
-      mt_entry->ops = op_table;
-      mt_entry->pathconf_limits_and_options = &IMFS_LIMITS_AND_OPTIONS;
-      mt_entry->mt_fs_root->location.node_access = root_node;
-      IMFS_Set_handlers( &mt_entry->mt_fs_root->location );
-    } else {
-      free(fs_info);
-      errno = ENOMEM;
-      rv = -1;
-    }
+    IMFS_assert( root_node != NULL );
+
+    mt_entry->fs_info = fs_info;
+    mt_entry->ops = op_table;
+    mt_entry->pathconf_limits_and_options = &IMFS_LIMITS_AND_OPTIONS;
+    mt_entry->mt_fs_root->location.node_access = root_node;
+    IMFS_Set_handlers( &mt_entry->mt_fs_root->location );
   } else {
     errno = ENOMEM;
     rv = -1;

testsuites/fstests/mimfs_support/fs_support.c

@@ -14,10 +14,13 @@
 
 #include <sys/stat.h>
 #include <rtems/libio.h>
+#include <rtems/libcsupport.h>
 
 #include "fstest.h"
 #include "fstest_support.h"
 
+static rtems_resource_snapshot before_mount;
+
 void
 test_initialize_filesystem (void)
 {
@@ -25,6 +28,8 @@ test_initialize_filesystem (void)
   rc = mkdir (BASE_FOR_TEST,S_IRWXU|S_IRWXG|S_IRWXO);
   rtems_test_assert (rc == 0);
 
+  rtems_resource_snapshot_take(&before_mount);
+
   rc = mount (NULL, BASE_FOR_TEST, "imfs", RTEMS_FILESYSTEM_READ_WRITE, NULL);
   rtems_test_assert (rc == 0);
 }
@@ -36,6 +41,8 @@ test_shutdown_filesystem (void)
   int rc = 0;
   rc = unmount (BASE_FOR_TEST);
   rtems_test_assert (rc == 0);
+
+  rtems_test_assert(rtems_resource_snapshot_check(&before_mount));
 }
 
 /* configuration information */