Ejemplo n.º 1
0
int IMFS_mknod(
  const rtems_filesystem_location_info_t *parentloc,
  const char *name,
  size_t namelen,
  mode_t mode,
  dev_t dev
)
{
  int rv = 0;
  IMFS_jnode_types_t type;
  IMFS_types_union info;
  IMFS_jnode_t *new_node;

  get_type_and_info_by_mode_and_dev( mode, dev, &type, &info );

  new_node = IMFS_create_node( parentloc, type, name, namelen, mode, &info );
  if ( new_node != NULL ) {
    IMFS_jnode_t *parent = parentloc->node_access;

    IMFS_update_ctime( parent );
    IMFS_update_mtime( parent );
  } else {
    rv = -1;
  }

  return rv;
}
Ejemplo n.º 2
0
/*
 *  IMFS_memfile_extend
 *
 *  This routine insures that the in-memory file is of the length
 *  specified.  If necessary, it will allocate memory blocks to
 *  extend the file.
 */
MEMFILE_STATIC int IMFS_memfile_extend(
   IMFS_jnode_t  *the_jnode,
   off_t          new_length
)
{
  unsigned int   block;
  unsigned int   new_blocks;
  unsigned int   old_blocks;

  /*
   *  Perform internal consistency checks
   */
  IMFS_assert( the_jnode );
    IMFS_assert( IMFS_type( the_jnode ) == IMFS_MEMORY_FILE );

  /*
   *  Verify new file size is supported
   */
  if ( new_length >= IMFS_MEMFILE_MAXIMUM_SIZE )
    rtems_set_errno_and_return_minus_one( EINVAL );

  /*
   *  Verify new file size is actually larger than current size
   */
  if ( new_length <= the_jnode->info.file.size )
    return 0;

  /*
   *  Calculate the number of range of blocks to allocate
   */
  new_blocks = new_length / IMFS_MEMFILE_BYTES_PER_BLOCK;
  old_blocks = the_jnode->info.file.size / IMFS_MEMFILE_BYTES_PER_BLOCK;

  /*
   *  Now allocate each of those blocks.
   */
  for ( block=old_blocks ; block<=new_blocks ; block++ ) {
    if ( IMFS_memfile_addblock( the_jnode, block ) ) {
       for ( ; block>=old_blocks ; block-- ) {
         IMFS_memfile_remove_block( the_jnode, block );
       }
       rtems_set_errno_and_return_minus_one( ENOSPC );
    }
  }

  /*
   *  Set the new length of the file.
   */
  the_jnode->info.file.size = new_length;

  IMFS_update_ctime(the_jnode);
  IMFS_update_mtime(the_jnode);
  return 0;
}
Ejemplo n.º 3
0
int IMFS_mknod(
  const char                        *token,      /* IN */
  mode_t                             mode,       /* IN */
  dev_t                              dev,        /* IN */
  rtems_filesystem_location_info_t  *pathloc     /* IN/OUT */
)
{
  IMFS_token_types   type = 0;
  IMFS_jnode_t      *new_node;
  int                result;
  char               new_name[ IMFS_NAME_MAX + 1 ];
  IMFS_types_union   info;

  IMFS_get_token( token, strlen( token ), new_name, &result );

  /*
   *  Figure out what type of IMFS node this is.
   */
  if ( S_ISDIR(mode) )
    type = IMFS_DIRECTORY;
  else if ( S_ISREG(mode) )
    type = IMFS_MEMORY_FILE;
  else if ( S_ISBLK(mode) || S_ISCHR(mode) ) {
    type = IMFS_DEVICE;
    rtems_filesystem_split_dev_t( dev, info.device.major, info.device.minor );
  } else if (S_ISFIFO(mode))
    type = IMFS_FIFO;
  else 
    IMFS_assert( 0 );

  /*
   *  Allocate and fill in an IMFS jnode
   *
   *  NOTE: Coverity Id 21 reports this as a leak.
   *        While technically not a leak, it indicated that IMFS_create_node
   *        was ONLY passed a NULL when we created the root node.  We
   *        added a new IMFS_create_root_node() so this path no longer
   *        existed.  The result was simpler code which should not have
   *        this path. 
   */
  new_node = IMFS_create_node( pathloc, type, new_name, mode, &info );
  if ( !new_node )
    rtems_set_errno_and_return_minus_one( ENOMEM );

  IMFS_update_ctime(new_node->Parent);
  IMFS_update_mtime(new_node->Parent);
  return 0;
}
Ejemplo n.º 4
0
int IMFS_make_generic_node(
  const char *path,
  mode_t mode,
  const IMFS_node_control *node_control,
  void *context
)
{
  int rv = 0;

  mode &= ~rtems_filesystem_umask;

  switch (mode & S_IFMT) {
    case S_IFBLK:
    case S_IFCHR:
    case S_IFIFO:
    case S_IFREG:
      break;
    default:
      errno = EINVAL;
      rv = -1;
      break;
  }
  
  if ( rv == 0 ) {
    if ( node_control->imfs_type == IMFS_GENERIC ) {
      rtems_filesystem_eval_path_context_t ctx;
      int eval_flags = RTEMS_FS_FOLLOW_LINK
        | RTEMS_FS_MAKE
        | RTEMS_FS_EXCLUSIVE;
      const rtems_filesystem_location_info_t *currentloc =
        rtems_filesystem_eval_path_start( &ctx, path, eval_flags );

      if ( IMFS_is_imfs_instance( currentloc ) ) {
        IMFS_types_union info;
        IMFS_jnode_t *new_node;

        info.generic.context = context;
        new_node = IMFS_create_node_with_control(
          currentloc,
          node_control,
          rtems_filesystem_eval_path_get_token( &ctx ),
          rtems_filesystem_eval_path_get_tokenlen( &ctx ),
          mode,
          &info
        );

        if ( new_node != NULL ) {
          IMFS_jnode_t *parent = currentloc->node_access;

          IMFS_update_ctime( parent );
          IMFS_update_mtime( parent );
        } else {
          rv = -1;
        }
      } else {
        rtems_filesystem_eval_path_error( &ctx, ENOTSUP );
        rv = -1;
      }

      rtems_filesystem_eval_path_cleanup( &ctx );
    } else {
      errno = EINVAL;
      rv = -1;
    }
  }

  return rv;
}