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gerrit-public.fairphone.software / kernel / msm / a664b2d8555c659127bf8fe049a58449d394a707 / . / fs / ocfs2 / ocfs2_ioctl.h
blob: b46f39bf7438d5048dd5637d5762b4d6c44990e4 [file] [log] [blame]
Tristan Ye9df57782010-03-02 13:59:42 +0800[diff] [blame]1/* -*- mode: c; c-basic-offset: 8; -*-
2 * vim: noexpandtab sw=8 ts=8 sts=0:
3 *
4 * ocfs2_ioctl.h
5 *
6 * Defines OCFS2 ioctls.
7 *
8 * Copyright (C) 2010 Oracle. All rights reserved.
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public
12 * License, version 2, as published by the Free Software Foundation.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
18 */
19
20#ifndef OCFS2_IOCTL_H
21#define OCFS2_IOCTL_H
22
23/*
24 * ioctl commands
25 */
Tao Ma0000b862010-09-19 13:42:29 +0800[diff] [blame]26#define OCFS2_IOC_GETFLAGS FS_IOC_GETFLAGS
27#define OCFS2_IOC_SETFLAGS FS_IOC_SETFLAGS
28#define OCFS2_IOC32_GETFLAGS FS_IOC32_GETFLAGS
29#define OCFS2_IOC32_SETFLAGS FS_IOC32_SETFLAGS
Tristan Ye9df57782010-03-02 13:59:42 +0800[diff] [blame]30
31/*
32 * Space reservation / allocation / free ioctls and argument structure
33 * are designed to be compatible with XFS.
34 *
35 * ALLOCSP* and FREESP* are not and will never be supported, but are
36 * included here for completeness.
37 */
38struct ocfs2_space_resv {
39 __s16 l_type;
40 __s16 l_whence;
41 __s64 l_start;
42 __s64 l_len; /* len == 0 means until end of file */
43 __s32 l_sysid;
44 __u32 l_pid;
45 __s32 l_pad[4]; /* reserve area */
46};
47
48#define OCFS2_IOC_ALLOCSP _IOW ('X', 10, struct ocfs2_space_resv)
49#define OCFS2_IOC_FREESP _IOW ('X', 11, struct ocfs2_space_resv)
50#define OCFS2_IOC_RESVSP _IOW ('X', 40, struct ocfs2_space_resv)
51#define OCFS2_IOC_UNRESVSP _IOW ('X', 41, struct ocfs2_space_resv)
52#define OCFS2_IOC_ALLOCSP64 _IOW ('X', 36, struct ocfs2_space_resv)
53#define OCFS2_IOC_FREESP64 _IOW ('X', 37, struct ocfs2_space_resv)
54#define OCFS2_IOC_RESVSP64 _IOW ('X', 42, struct ocfs2_space_resv)
55#define OCFS2_IOC_UNRESVSP64 _IOW ('X', 43, struct ocfs2_space_resv)
56
57/* Used to pass group descriptor data when online resize is done */
58struct ocfs2_new_group_input {
59 __u64 group; /* Group descriptor's blkno. */
60 __u32 clusters; /* Total number of clusters in this group */
61 __u32 frees; /* Total free clusters in this group */
62 __u16 chain; /* Chain for this group */
63 __u16 reserved1;
64 __u32 reserved2;
65};
66
67#define OCFS2_IOC_GROUP_EXTEND _IOW('o', 1, int)
68#define OCFS2_IOC_GROUP_ADD _IOW('o', 2,struct ocfs2_new_group_input)
69#define OCFS2_IOC_GROUP_ADD64 _IOW('o', 3,struct ocfs2_new_group_input)
70
71/* Used to pass 2 file names to reflink. */
72struct reflink_arguments {
73 __u64 old_path;
74 __u64 new_path;
75 __u64 preserve;
76};
77#define OCFS2_IOC_REFLINK _IOW('o', 4, struct reflink_arguments)
78
Tristan Yeddee5cd2010-05-22 16:26:33 +0800[diff] [blame]79/* Following definitions dedicated for ocfs2_info_request ioctls. */
80#define OCFS2_INFO_MAX_REQUEST (50)
81#define OCFS2_TEXT_UUID_LEN (OCFS2_VOL_UUID_LEN * 2)
82
83/* Magic number of all requests */
84#define OCFS2_INFO_MAGIC (0x4F32494E)
85
86/*
87 * Always try to separate info request into small pieces to
88 * guarantee the backward&forward compatibility.
89 */
90struct ocfs2_info {
91 __u64 oi_requests; /* Array of __u64 pointers to requests */
92 __u32 oi_count; /* Number of requests in info_requests */
93 __u32 oi_pad;
94};
95
96struct ocfs2_info_request {
97/*00*/ __u32 ir_magic; /* Magic number */
98 __u32 ir_code; /* Info request code */
99 __u32 ir_size; /* Size of request */
100 __u32 ir_flags; /* Request flags */
101/*10*/ /* Request specific fields */
102};
103
104struct ocfs2_info_clustersize {
105 struct ocfs2_info_request ic_req;
106 __u32 ic_clustersize;
107 __u32 ic_pad;
108};
109
110struct ocfs2_info_blocksize {
111 struct ocfs2_info_request ib_req;
112 __u32 ib_blocksize;
113 __u32 ib_pad;
114};
115
116struct ocfs2_info_maxslots {
117 struct ocfs2_info_request im_req;
118 __u32 im_max_slots;
119 __u32 im_pad;
120};
121
122struct ocfs2_info_label {
123 struct ocfs2_info_request il_req;
124 __u8 il_label[OCFS2_MAX_VOL_LABEL_LEN];
125} __attribute__ ((packed));
126
127struct ocfs2_info_uuid {
128 struct ocfs2_info_request iu_req;
129 __u8 iu_uuid_str[OCFS2_TEXT_UUID_LEN + 1];
130} __attribute__ ((packed));
131
132struct ocfs2_info_fs_features {
133 struct ocfs2_info_request if_req;
134 __u32 if_compat_features;
135 __u32 if_incompat_features;
136 __u32 if_ro_compat_features;
137 __u32 if_pad;
138};
139
140struct ocfs2_info_journal_size {
141 struct ocfs2_info_request ij_req;
142 __u64 ij_journal_size;
143};
144
145/* Codes for ocfs2_info_request */
146enum ocfs2_info_type {
147 OCFS2_INFO_CLUSTERSIZE = 1,
148 OCFS2_INFO_BLOCKSIZE,
149 OCFS2_INFO_MAXSLOTS,
150 OCFS2_INFO_LABEL,
151 OCFS2_INFO_UUID,
152 OCFS2_INFO_FS_FEATURES,
153 OCFS2_INFO_JOURNAL_SIZE,
154 OCFS2_INFO_NUM_TYPES
155};
156
157/* Flags for struct ocfs2_info_request */
158/* Filled by the caller */
159#define OCFS2_INFO_FL_NON_COHERENT (0x00000001) /* Cluster coherency not
160 required. This is a hint.
161 It is up to ocfs2 whether
162 the request can be fulfilled
163 without locking. */
164/* Filled by ocfs2 */
165#define OCFS2_INFO_FL_FILLED (0x40000000) /* Filesystem understood
166 this request and
167 filled in the answer */
168
169#define OCFS2_INFO_FL_ERROR (0x80000000) /* Error happened during
170 request handling. */
171
172#define OCFS2_IOC_INFO _IOR('o', 5, struct ocfs2_info)
173
Tristan Ye9df57782010-03-02 13:59:42 +0800[diff] [blame]174#endif /* OCFS2_IOCTL_H */