1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  * ocfs2_ioctl.h
4  *
5  * Defines OCFS2 ioctls.
6  *
7  * Copyright (C) 2010 Oracle.  All rights reserved.
8  */
9 
10 #ifndef OCFS2_IOCTL_H
11 #define OCFS2_IOCTL_H
12 
13 /*
14  * Space reservation / allocation / free ioctls and argument structure
15  * are designed to be compatible with XFS.
16  *
17  * ALLOCSP* and FREESP* are not and will never be supported, but are
18  * included here for completeness.
19  */
20 struct ocfs2_space_resv {
21 	__s16		l_type;
22 	__s16		l_whence;
23 	__s64		l_start;
24 	__s64		l_len;		/* len == 0 means until end of file */
25 	__s32		l_sysid;
26 	__u32		l_pid;
27 	__s32		l_pad[4];	/* reserve area			    */
28 };
29 
30 #define OCFS2_IOC_ALLOCSP		_IOW ('X', 10, struct ocfs2_space_resv)
31 #define OCFS2_IOC_FREESP		_IOW ('X', 11, struct ocfs2_space_resv)
32 #define OCFS2_IOC_RESVSP		_IOW ('X', 40, struct ocfs2_space_resv)
33 #define OCFS2_IOC_UNRESVSP	_IOW ('X', 41, struct ocfs2_space_resv)
34 #define OCFS2_IOC_ALLOCSP64	_IOW ('X', 36, struct ocfs2_space_resv)
35 #define OCFS2_IOC_FREESP64	_IOW ('X', 37, struct ocfs2_space_resv)
36 #define OCFS2_IOC_RESVSP64	_IOW ('X', 42, struct ocfs2_space_resv)
37 #define OCFS2_IOC_UNRESVSP64	_IOW ('X', 43, struct ocfs2_space_resv)
38 
39 /* Used to pass group descriptor data when online resize is done */
40 struct ocfs2_new_group_input {
41 	__u64 group;		/* Group descriptor's blkno. */
42 	__u32 clusters;		/* Total number of clusters in this group */
43 	__u32 frees;		/* Total free clusters in this group */
44 	__u16 chain;		/* Chain for this group */
45 	__u16 reserved1;
46 	__u32 reserved2;
47 };
48 
49 #define OCFS2_IOC_GROUP_EXTEND	_IOW('o', 1, int)
50 #define OCFS2_IOC_GROUP_ADD	_IOW('o', 2,struct ocfs2_new_group_input)
51 #define OCFS2_IOC_GROUP_ADD64	_IOW('o', 3,struct ocfs2_new_group_input)
52 
53 /* Used to pass 2 file names to reflink. */
54 struct reflink_arguments {
55 	__u64 old_path;
56 	__u64 new_path;
57 	__u64 preserve;
58 };
59 #define OCFS2_IOC_REFLINK	_IOW('o', 4, struct reflink_arguments)
60 
61 /* Following definitions dedicated for ocfs2_info_request ioctls. */
62 #define OCFS2_INFO_MAX_REQUEST		(50)
63 #define OCFS2_TEXT_UUID_LEN		(OCFS2_VOL_UUID_LEN * 2)
64 
65 /* Magic number of all requests */
66 #define OCFS2_INFO_MAGIC		(0x4F32494E)
67 
68 /*
69  * Always try to separate info request into small pieces to
70  * guarantee the backward&forward compatibility.
71  */
72 struct ocfs2_info {
73 	__u64 oi_requests;	/* Array of __u64 pointers to requests */
74 	__u32 oi_count;		/* Number of requests in info_requests */
75 	__u32 oi_pad;
76 };
77 
78 struct ocfs2_info_request {
79 /*00*/	__u32 ir_magic;	/* Magic number */
80 	__u32 ir_code;	/* Info request code */
81 	__u32 ir_size;	/* Size of request */
82 	__u32 ir_flags;	/* Request flags */
83 /*10*/			/* Request specific fields */
84 };
85 
86 struct ocfs2_info_clustersize {
87 	struct ocfs2_info_request ic_req;
88 	__u32 ic_clustersize;
89 	__u32 ic_pad;
90 };
91 
92 struct ocfs2_info_blocksize {
93 	struct ocfs2_info_request ib_req;
94 	__u32 ib_blocksize;
95 	__u32 ib_pad;
96 };
97 
98 struct ocfs2_info_maxslots {
99 	struct ocfs2_info_request im_req;
100 	__u32 im_max_slots;
101 	__u32 im_pad;
102 };
103 
104 struct ocfs2_info_label {
105 	struct ocfs2_info_request il_req;
106 	__u8	il_label[OCFS2_MAX_VOL_LABEL_LEN];
107 } __attribute__ ((packed));
108 
109 struct ocfs2_info_uuid {
110 	struct ocfs2_info_request iu_req;
111 	__u8	iu_uuid_str[OCFS2_TEXT_UUID_LEN + 1];
112 } __attribute__ ((packed));
113 
114 struct ocfs2_info_fs_features {
115 	struct ocfs2_info_request if_req;
116 	__u32 if_compat_features;
117 	__u32 if_incompat_features;
118 	__u32 if_ro_compat_features;
119 	__u32 if_pad;
120 };
121 
122 struct ocfs2_info_journal_size {
123 	struct ocfs2_info_request ij_req;
124 	__u64 ij_journal_size;
125 };
126 
127 struct ocfs2_info_freeinode {
128 	struct ocfs2_info_request ifi_req;
129 	struct ocfs2_info_local_freeinode {
130 		__u64 lfi_total;
131 		__u64 lfi_free;
132 	} ifi_stat[OCFS2_MAX_SLOTS];
133 	__u32 ifi_slotnum; /* out */
134 	__u32 ifi_pad;
135 };
136 
137 #define OCFS2_INFO_MAX_HIST     (32)
138 
139 struct ocfs2_info_freefrag {
140 	struct ocfs2_info_request iff_req;
141 	struct ocfs2_info_freefrag_stats { /* (out) */
142 		struct ocfs2_info_free_chunk_list {
143 			__u32 fc_chunks[OCFS2_INFO_MAX_HIST];
144 			__u32 fc_clusters[OCFS2_INFO_MAX_HIST];
145 		} ffs_fc_hist;
146 		__u32 ffs_clusters;
147 		__u32 ffs_free_clusters;
148 		__u32 ffs_free_chunks;
149 		__u32 ffs_free_chunks_real;
150 		__u32 ffs_min; /* Minimum free chunksize in clusters */
151 		__u32 ffs_max;
152 		__u32 ffs_avg;
153 		__u32 ffs_pad;
154 	} iff_ffs;
155 	__u32 iff_chunksize; /* chunksize in clusters(in) */
156 	__u32 iff_pad;
157 };
158 
159 /* Codes for ocfs2_info_request */
160 enum ocfs2_info_type {
161 	OCFS2_INFO_CLUSTERSIZE = 1,
162 	OCFS2_INFO_BLOCKSIZE,
163 	OCFS2_INFO_MAXSLOTS,
164 	OCFS2_INFO_LABEL,
165 	OCFS2_INFO_UUID,
166 	OCFS2_INFO_FS_FEATURES,
167 	OCFS2_INFO_JOURNAL_SIZE,
168 	OCFS2_INFO_FREEINODE,
169 	OCFS2_INFO_FREEFRAG,
170 	OCFS2_INFO_NUM_TYPES
171 };
172 
173 /* Flags for struct ocfs2_info_request */
174 /* Filled by the caller */
175 #define OCFS2_INFO_FL_NON_COHERENT	(0x00000001)	/* Cluster coherency not
176 							   required. This is a hint.
177 							   It is up to ocfs2 whether
178 							   the request can be fulfilled
179 							   without locking. */
180 /* Filled by ocfs2 */
181 #define OCFS2_INFO_FL_FILLED		(0x40000000)	/* Filesystem understood
182 							   this request and
183 							   filled in the answer */
184 
185 #define OCFS2_INFO_FL_ERROR		(0x80000000)	/* Error happened during
186 							   request handling. */
187 
188 #define OCFS2_IOC_INFO		_IOR('o', 5, struct ocfs2_info)
189 
190 struct ocfs2_move_extents {
191 /* All values are in bytes */
192 	/* in */
193 	__u64 me_start;		/* Virtual start in the file to move */
194 	__u64 me_len;		/* Length of the extents to be moved */
195 	__u64 me_goal;		/* Physical offset of the goal,
196 				   it's in block unit */
197 	__u64 me_threshold;	/* Maximum distance from goal or threshold
198 				   for auto defragmentation */
199 	__u64 me_flags;		/* Flags for the operation:
200 				 * - auto defragmentation.
201 				 * - refcount,xattr cases.
202 				 */
203 	/* out */
204 	__u64 me_moved_len;	/* Moved/defraged length */
205 	__u64 me_new_offset;	/* Resulting physical location */
206 	__u32 me_reserved[2];	/* Reserved for futhure */
207 };
208 
209 #define OCFS2_MOVE_EXT_FL_AUTO_DEFRAG	(0x00000001)	/* Kernel manages to
210 							   claim new clusters
211 							   as the goal place
212 							   for extents moving */
213 #define OCFS2_MOVE_EXT_FL_PART_DEFRAG	(0x00000002)	/* Allow partial extent
214 							   moving, is to make
215 							   movement less likely
216 							   to fail, may make fs
217 							   even more fragmented */
218 #define OCFS2_MOVE_EXT_FL_COMPLETE	(0x00000004)	/* Move or defragmenation
219 							   completely gets done.
220 							 */
221 
222 #define OCFS2_IOC_MOVE_EXT	_IOW('o', 6, struct ocfs2_move_extents)
223 
224 #endif /* OCFS2_IOCTL_H */
225