1/* SPDX-License-Identifier: GPL-2.0 */
  2/*
  3 * (C) 2001 Clemson University and The University of Chicago
  4 *
  5 * See COPYING in top-level directory.
  6 */
  7
  8/*
  9 *  Definitions of downcalls used in Linux kernel module.
 10 */
 11
 12#ifndef __DOWNCALL_H
 13#define __DOWNCALL_H
 14
 15/*
 16 * Sanitized the device-client core interaction
 17 * for clean 32-64 bit usage
 18 */
 19struct orangefs_io_response {
 20	__s64 amt_complete;
 21};
 22
 23struct orangefs_lookup_response {
 24	struct orangefs_object_kref refn;
 25};
 26
 27struct orangefs_create_response {
 28	struct orangefs_object_kref refn;
 29};
 30
 31struct orangefs_symlink_response {
 32	struct orangefs_object_kref refn;
 33};
 34
 35struct orangefs_getattr_response {
 36	struct ORANGEFS_sys_attr_s attributes;
 37	char link_target[ORANGEFS_NAME_MAX];
 38};
 39
 40struct orangefs_mkdir_response {
 41	struct orangefs_object_kref refn;
 42};
 43
 44struct orangefs_statfs_response {
 45	__s64 block_size;
 46	__s64 blocks_total;
 47	__s64 blocks_avail;
 48	__s64 files_total;
 49	__s64 files_avail;
 50};
 51
 52struct orangefs_fs_mount_response {
 53	__s32 fs_id;
 54	__s32 id;
 55	struct orangefs_khandle root_khandle;
 56};
 57
 58/* the getxattr response is the attribute value */
 59struct orangefs_getxattr_response {
 60	__s32 val_sz;
 61	__s32 __pad1;
 62	char val[ORANGEFS_MAX_XATTR_VALUELEN];
 63};
 64
 65/* the listxattr response is an array of attribute names */
 66struct orangefs_listxattr_response {
 67	__s32 returned_count;
 68	__s32 __pad1;
 69	__u64 token;
 70	char key[ORANGEFS_MAX_XATTR_LISTLEN * ORANGEFS_MAX_XATTR_NAMELEN];
 71	__s32 keylen;
 72	__s32 __pad2;
 73	__s32 lengths[ORANGEFS_MAX_XATTR_LISTLEN];
 74};
 75
 76struct orangefs_param_response {
 77	union {
 78		__s64 value64;
 79		__s32 value32[2];
 80	} u;
 81};
 82
 83#define PERF_COUNT_BUF_SIZE 4096
 84struct orangefs_perf_count_response {
 85	char buffer[PERF_COUNT_BUF_SIZE];
 86};
 87
 88#define FS_KEY_BUF_SIZE 4096
 89struct orangefs_fs_key_response {
 90	__s32 fs_keylen;
 91	__s32 __pad1;
 92	char fs_key[FS_KEY_BUF_SIZE];
 93};
 94
 95/* 2.9.6 */
 96struct orangefs_features_response {
 97	__u64 features;
 98};
 99
100struct orangefs_downcall_s {
101	__s32 type;
102	__s32 status;
103	/* currently trailer is used only by readdir */
104	__s64 trailer_size;
105	char *trailer_buf;
106
107	union {
108		struct orangefs_io_response io;
109		struct orangefs_lookup_response lookup;
110		struct orangefs_create_response create;
111		struct orangefs_symlink_response sym;
112		struct orangefs_getattr_response getattr;
113		struct orangefs_mkdir_response mkdir;
114		struct orangefs_statfs_response statfs;
115		struct orangefs_fs_mount_response fs_mount;
116		struct orangefs_getxattr_response getxattr;
117		struct orangefs_listxattr_response listxattr;
118		struct orangefs_param_response param;
119		struct orangefs_perf_count_response perf_count;
120		struct orangefs_fs_key_response fs_key;
121		struct orangefs_features_response features;
122	} resp;
123};
124
125/*
126 * The readdir response comes in the trailer.  It is followed by the
127 * directory entries as described in dir.c.
128 */
129
130struct orangefs_readdir_response_s {
131	__u64 token;
132	__u64 directory_version;
133	__u32 __pad2;
134	__u32 orangefs_dirent_outcount;
135};
136
137#endif /* __DOWNCALL_H */