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 */ 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 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 145struct 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 157struct 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 */ 178enum 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 208struct 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 */ 243