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ocfs2_ioctl.h
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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  */
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
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  */
38 struct 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 */
58 struct 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. */
72 struct 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 
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  */
90 struct 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 
96 struct 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 
104 struct ocfs2_info_clustersize {
105  struct ocfs2_info_request ic_req;
106  __u32 ic_clustersize;
107  __u32 ic_pad;
108 };
109 
110 struct ocfs2_info_blocksize {
111  struct ocfs2_info_request ib_req;
112  __u32 ib_blocksize;
113  __u32 ib_pad;
114 };
115 
116 struct ocfs2_info_maxslots {
117  struct ocfs2_info_request im_req;
118  __u32 im_max_slots;
119  __u32 im_pad;
120 };
121 
122 struct ocfs2_info_label {
123  struct ocfs2_info_request il_req;
124  __u8 il_label[OCFS2_MAX_VOL_LABEL_LEN];
125 } __attribute__ ((packed));
126 
127 struct ocfs2_info_uuid {
128  struct ocfs2_info_request iu_req;
129  __u8 iu_uuid_str[OCFS2_TEXT_UUID_LEN + 1];
130 } __attribute__ ((packed));
131 
132 struct 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 
140 struct ocfs2_info_journal_size {
141  struct ocfs2_info_request ij_req;
142  __u64 ij_journal_size;
143 };
144 
145 struct ocfs2_info_freeinode {
146  struct ocfs2_info_request ifi_req;
147  struct ocfs2_info_local_freeinode {
148  __u64 lfi_total;
149  __u64 lfi_free;
150  } ifi_stat[OCFS2_MAX_SLOTS];
151  __u32 ifi_slotnum; /* out */
152  __u32 ifi_pad;
153 };
154 
155 #define OCFS2_INFO_MAX_HIST (32)
156 
157 struct ocfs2_info_freefrag {
158  struct ocfs2_info_request iff_req;
159  struct ocfs2_info_freefrag_stats { /* (out) */
160  struct ocfs2_info_free_chunk_list {
161  __u32 fc_chunks[OCFS2_INFO_MAX_HIST];
162  __u32 fc_clusters[OCFS2_INFO_MAX_HIST];
163  } ffs_fc_hist;
164  __u32 ffs_clusters;
165  __u32 ffs_free_clusters;
166  __u32 ffs_free_chunks;
167  __u32 ffs_free_chunks_real;
168  __u32 ffs_min; /* Minimum free chunksize in clusters */
169  __u32 ffs_max;
170  __u32 ffs_avg;
171  __u32 ffs_pad;
172  } iff_ffs;
173  __u32 iff_chunksize; /* chunksize in clusters(in) */
174  __u32 iff_pad;
175 };
176 
177 /* Codes for ocfs2_info_request */
178 enum ocfs2_info_type {
179  OCFS2_INFO_CLUSTERSIZE = 1,
180  OCFS2_INFO_BLOCKSIZE,
181  OCFS2_INFO_MAXSLOTS,
182  OCFS2_INFO_LABEL,
183  OCFS2_INFO_UUID,
184  OCFS2_INFO_FS_FEATURES,
185  OCFS2_INFO_JOURNAL_SIZE,
186  OCFS2_INFO_FREEINODE,
187  OCFS2_INFO_FREEFRAG,
188  OCFS2_INFO_NUM_TYPES
189 };
190 
191 /* Flags for struct ocfs2_info_request */
192 /* Filled by the caller */
193 #define OCFS2_INFO_FL_NON_COHERENT (0x00000001) /* Cluster coherency not
194  required. This is a hint.
195  It is up to ocfs2 whether
196  the request can be fulfilled
197  without locking. */
198 /* Filled by ocfs2 */
199 #define OCFS2_INFO_FL_FILLED (0x40000000) /* Filesystem understood
200  this request and
201  filled in the answer */
202 
203 #define OCFS2_INFO_FL_ERROR (0x80000000) /* Error happened during
204  request handling. */
205 
206 #define OCFS2_IOC_INFO _IOR('o', 5, struct ocfs2_info)
207 
208 struct ocfs2_move_extents {
209 /* All values are in bytes */
210  /* in */
211  __u64 me_start; /* Virtual start in the file to move */
212  __u64 me_len; /* Length of the extents to be moved */
213  __u64 me_goal; /* Physical offset of the goal,
214  it's in block unit */
215  __u64 me_threshold; /* Maximum distance from goal or threshold
216  for auto defragmentation */
217  __u64 me_flags; /* Flags for the operation:
218  * - auto defragmentation.
219  * - refcount,xattr cases.
220  */
221  /* out */
222  __u64 me_moved_len; /* Moved/defraged length */
223  __u64 me_new_offset; /* Resulting physical location */
224  __u32 me_reserved[2]; /* Reserved for futhure */
225 };
226 
227 #define OCFS2_MOVE_EXT_FL_AUTO_DEFRAG (0x00000001) /* Kernel manages to
228  claim new clusters
229  as the goal place
230  for extents moving */
231 #define OCFS2_MOVE_EXT_FL_PART_DEFRAG (0x00000002) /* Allow partial extent
232  moving, is to make
233  movement less likely
234  to fail, may make fs
235  even more fragmented */
236 #define OCFS2_MOVE_EXT_FL_COMPLETE (0x00000004) /* Move or defragmenation
237  completely gets done.
238  */
239 
240 #define OCFS2_IOC_MOVE_EXT _IOW('o', 6, struct ocfs2_move_extents)
241 
242 #endif /* OCFS2_IOCTL_H */
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