text: /*
   * (C) 2001 Clemson University and The University of Chicago
   *
   * See COPYING in top-level directory.
   */
  
  /*
   *  Definitions of downcalls used in Linux kernel module.
   */
  
  #ifndef __DOWNCALL_H
  #define __DOWNCALL_H
  
  /*
   * Sanitized the device-client core interaction
   * for clean 32-64 bit usage
   */
  struct orangefs_io_response {
  	__s64 amt_complete;
  };
  
  struct orangefs_lookup_response {
  	struct orangefs_object_kref refn;
  };
  
  struct orangefs_create_response {
  	struct orangefs_object_kref refn;
  };
  
  struct orangefs_symlink_response {
  	struct orangefs_object_kref refn;
  };
  
  struct orangefs_getattr_response {
  	struct ORANGEFS_sys_attr_s attributes;
  	char link_target[ORANGEFS_NAME_MAX];
  };
  
  struct orangefs_mkdir_response {
  	struct orangefs_object_kref refn;
  };
  
  /*
   * duplication of some system interface structures so that I don't have
   * to allocate extra memory
   */
  struct orangefs_dirent {
  	char *d_name;
  	int d_length;
  	struct orangefs_khandle khandle;
  };
  
  struct orangefs_statfs_response {
  	__s64 block_size;
  	__s64 blocks_total;
  	__s64 blocks_avail;
  	__s64 files_total;
  	__s64 files_avail;
  };
  
  struct orangefs_fs_mount_response {
  	__s32 fs_id;
  	__s32 id;
  	struct orangefs_khandle root_khandle;
  };
  
  /* the getxattr response is the attribute value */
  struct orangefs_getxattr_response {
  	__s32 val_sz;
  	__s32 __pad1;
  	char val[ORANGEFS_MAX_XATTR_VALUELEN];
  };
  
  /* the listxattr response is an array of attribute names */
  struct orangefs_listxattr_response {
  	__s32 returned_count;
  	__s32 __pad1;
  	__u64 token;
  	char key[ORANGEFS_MAX_XATTR_LISTLEN * ORANGEFS_MAX_XATTR_NAMELEN];
  	__s32 keylen;
  	__s32 __pad2;
  	__s32 lengths[ORANGEFS_MAX_XATTR_LISTLEN];
  };
  
  struct orangefs_param_response {
  	__s64 value;
  };
  
  #define PERF_COUNT_BUF_SIZE 4096
  struct orangefs_perf_count_response {
  	char buffer[PERF_COUNT_BUF_SIZE];
  };
  
  #define FS_KEY_BUF_SIZE 4096
  struct orangefs_fs_key_response {
  	__s32 fs_keylen;
  	__s32 __pad1;
  	char fs_key[FS_KEY_BUF_SIZE];
  };
  
  struct orangefs_downcall_s {
  	__s32 type;
  	__s32 status;
  	/* currently trailer is used only by readdir */
  	__s64 trailer_size;
  	char *trailer_buf;
  
  	union {
  		struct orangefs_io_response io;
  		struct orangefs_lookup_response lookup;
  		struct orangefs_create_response create;
  		struct orangefs_symlink_response sym;
  		struct orangefs_getattr_response getattr;
  		struct orangefs_mkdir_response mkdir;
  		struct orangefs_statfs_response statfs;
  		struct orangefs_fs_mount_response fs_mount;
  		struct orangefs_getxattr_response getxattr;
  		struct orangefs_listxattr_response listxattr;
  		struct orangefs_param_response param;
  		struct orangefs_perf_count_response perf_count;
  		struct orangefs_fs_key_response fs_key;
  	} resp;
  };
  
  struct orangefs_readdir_response_s {
  	__u64 token;
  	__u64 directory_version;
  	__u32 __pad2;
  	__u32 orangefs_dirent_outcount;
  	struct orangefs_dirent *dirent_array;
  };
  
  #endif /* __DOWNCALL_H */
  