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 */
138