1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* -*- mode: c; c-basic-offset: 8; -*- 3 * vim: noexpandtab sw=8 ts=8 sts=0: 4 * 5 * ocfs2_ioctl.h 6 * 7 * Defines OCFS2 ioctls. 8 * 9 * Copyright (C) 2010 Oracle. All rights reserved. 10 */ 11 12 #ifndef OCFS2_IOCTL_H 13 #define OCFS2_IOCTL_H 14 15 /* 16 * ioctl commands 17 */ 18 #define OCFS2_IOC_GETFLAGS FS_IOC_GETFLAGS 19 #define OCFS2_IOC_SETFLAGS FS_IOC_SETFLAGS 20 #define OCFS2_IOC32_GETFLAGS FS_IOC32_GETFLAGS 21 #define OCFS2_IOC32_SETFLAGS FS_IOC32_SETFLAGS 22 23 /* 24 * Space reservation / allocation / free ioctls and argument structure 25 * are designed to be compatible with XFS. 26 * 27 * ALLOCSP* and FREESP* are not and will never be supported, but are 28 * included here for completeness. 29 */ 30 struct ocfs2_space_resv { 31 __s16 l_type; 32 __s16 l_whence; 33 __s64 l_start; 34 __s64 l_len; /* len == 0 means until end of file */ 35 __s32 l_sysid; 36 __u32 l_pid; 37 __s32 l_pad[4]; /* reserve area */ 38 }; 39 40 #define OCFS2_IOC_ALLOCSP _IOW ('X', 10, struct ocfs2_space_resv) 41 #define OCFS2_IOC_FREESP _IOW ('X', 11, struct ocfs2_space_resv) 42 #define OCFS2_IOC_RESVSP _IOW ('X', 40, struct ocfs2_space_resv) 43 #define OCFS2_IOC_UNRESVSP _IOW ('X', 41, struct ocfs2_space_resv) 44 #define OCFS2_IOC_ALLOCSP64 _IOW ('X', 36, struct ocfs2_space_resv) 45 #define OCFS2_IOC_FREESP64 _IOW ('X', 37, struct ocfs2_space_resv) 46 #define OCFS2_IOC_RESVSP64 _IOW ('X', 42, struct ocfs2_space_resv) 47 #define OCFS2_IOC_UNRESVSP64 _IOW ('X', 43, struct ocfs2_space_resv) 48 49 /* Used to pass group descriptor data when online resize is done */ 50 struct ocfs2_new_group_input { 51 __u64 group; /* Group descriptor's blkno. */ 52 __u32 clusters; /* Total number of clusters in this group */ 53 __u32 frees; /* Total free clusters in this group */ 54 __u16 chain; /* Chain for this group */ 55 __u16 reserved1; 56 __u32 reserved2; 57 }; 58 59 #define OCFS2_IOC_GROUP_EXTEND _IOW('o', 1, int) 60 #define OCFS2_IOC_GROUP_ADD _IOW('o', 2,struct ocfs2_new_group_input) 61 #define OCFS2_IOC_GROUP_ADD64 _IOW('o', 3,struct ocfs2_new_group_input) 62 63 /* Used to pass 2 file names to reflink. */ 64 struct reflink_arguments { 65 __u64 old_path; 66 __u64 new_path; 67 __u64 preserve; 68 }; 69 #define OCFS2_IOC_REFLINK _IOW('o', 4, struct reflink_arguments) 70 71 /* Following definitions dedicated for ocfs2_info_request ioctls. */ 72 #define OCFS2_INFO_MAX_REQUEST (50) 73 #define OCFS2_TEXT_UUID_LEN (OCFS2_VOL_UUID_LEN * 2) 74 75 /* Magic number of all requests */ 76 #define OCFS2_INFO_MAGIC (0x4F32494E) 77 78 /* 79 * Always try to separate info request into small pieces to 80 * guarantee the backward&forward compatibility. 81 */ 82 struct ocfs2_info { 83 __u64 oi_requests; /* Array of __u64 pointers to requests */ 84 __u32 oi_count; /* Number of requests in info_requests */ 85 __u32 oi_pad; 86 }; 87 88 struct ocfs2_info_request { 89 /*00*/ __u32 ir_magic; /* Magic number */ 90 __u32 ir_code; /* Info request code */ 91 __u32 ir_size; /* Size of request */ 92 __u32 ir_flags; /* Request flags */ 93 /*10*/ /* Request specific fields */ 94 }; 95 96 struct ocfs2_info_clustersize { 97 struct ocfs2_info_request ic_req; 98 __u32 ic_clustersize; 99 __u32 ic_pad; 100 }; 101 102 struct ocfs2_info_blocksize { 103 struct ocfs2_info_request ib_req; 104 __u32 ib_blocksize; 105 __u32 ib_pad; 106 }; 107 108 struct ocfs2_info_maxslots { 109 struct ocfs2_info_request im_req; 110 __u32 im_max_slots; 111 __u32 im_pad; 112 }; 113 114 struct ocfs2_info_label { 115 struct ocfs2_info_request il_req; 116 __u8 il_label[OCFS2_MAX_VOL_LABEL_LEN]; 117 } __attribute__ ((packed)); 118 119 struct ocfs2_info_uuid { 120 struct ocfs2_info_request iu_req; 121 __u8 iu_uuid_str[OCFS2_TEXT_UUID_LEN + 1]; 122 } __attribute__ ((packed)); 123 124 struct ocfs2_info_fs_features { 125 struct ocfs2_info_request if_req; 126 __u32 if_compat_features; 127 __u32 if_incompat_features; 128 __u32 if_ro_compat_features; 129 __u32 if_pad; 130 }; 131 132 struct ocfs2_info_journal_size { 133 struct ocfs2_info_request ij_req; 134 __u64 ij_journal_size; 135 }; 136 137 struct ocfs2_info_freeinode { 138 struct ocfs2_info_request ifi_req; 139 struct ocfs2_info_local_freeinode { 140 __u64 lfi_total; 141 __u64 lfi_free; 142 } ifi_stat[OCFS2_MAX_SLOTS]; 143 __u32 ifi_slotnum; /* out */ 144 __u32 ifi_pad; 145 }; 146 147 #define OCFS2_INFO_MAX_HIST (32) 148 149 struct ocfs2_info_freefrag { 150 struct ocfs2_info_request iff_req; 151 struct ocfs2_info_freefrag_stats { /* (out) */ 152 struct ocfs2_info_free_chunk_list { 153 __u32 fc_chunks[OCFS2_INFO_MAX_HIST]; 154 __u32 fc_clusters[OCFS2_INFO_MAX_HIST]; 155 } ffs_fc_hist; 156 __u32 ffs_clusters; 157 __u32 ffs_free_clusters; 158 __u32 ffs_free_chunks; 159 __u32 ffs_free_chunks_real; 160 __u32 ffs_min; /* Minimum free chunksize in clusters */ 161 __u32 ffs_max; 162 __u32 ffs_avg; 163 __u32 ffs_pad; 164 } iff_ffs; 165 __u32 iff_chunksize; /* chunksize in clusters(in) */ 166 __u32 iff_pad; 167 }; 168 169 /* Codes for ocfs2_info_request */ 170 enum ocfs2_info_type { 171 OCFS2_INFO_CLUSTERSIZE = 1, 172 OCFS2_INFO_BLOCKSIZE, 173 OCFS2_INFO_MAXSLOTS, 174 OCFS2_INFO_LABEL, 175 OCFS2_INFO_UUID, 176 OCFS2_INFO_FS_FEATURES, 177 OCFS2_INFO_JOURNAL_SIZE, 178 OCFS2_INFO_FREEINODE, 179 OCFS2_INFO_FREEFRAG, 180 OCFS2_INFO_NUM_TYPES 181 }; 182 183 /* Flags for struct ocfs2_info_request */ 184 /* Filled by the caller */ 185 #define OCFS2_INFO_FL_NON_COHERENT (0x00000001) /* Cluster coherency not 186 required. This is a hint. 187 It is up to ocfs2 whether 188 the request can be fulfilled 189 without locking. */ 190 /* Filled by ocfs2 */ 191 #define OCFS2_INFO_FL_FILLED (0x40000000) /* Filesystem understood 192 this request and 193 filled in the answer */ 194 195 #define OCFS2_INFO_FL_ERROR (0x80000000) /* Error happened during 196 request handling. */ 197 198 #define OCFS2_IOC_INFO _IOR('o', 5, struct ocfs2_info) 199 200 struct ocfs2_move_extents { 201 /* All values are in bytes */ 202 /* in */ 203 __u64 me_start; /* Virtual start in the file to move */ 204 __u64 me_len; /* Length of the extents to be moved */ 205 __u64 me_goal; /* Physical offset of the goal, 206 it's in block unit */ 207 __u64 me_threshold; /* Maximum distance from goal or threshold 208 for auto defragmentation */ 209 __u64 me_flags; /* Flags for the operation: 210 * - auto defragmentation. 211 * - refcount,xattr cases. 212 */ 213 /* out */ 214 __u64 me_moved_len; /* Moved/defraged length */ 215 __u64 me_new_offset; /* Resulting physical location */ 216 __u32 me_reserved[2]; /* Reserved for futhure */ 217 }; 218 219 #define OCFS2_MOVE_EXT_FL_AUTO_DEFRAG (0x00000001) /* Kernel manages to 220 claim new clusters 221 as the goal place 222 for extents moving */ 223 #define OCFS2_MOVE_EXT_FL_PART_DEFRAG (0x00000002) /* Allow partial extent 224 moving, is to make 225 movement less likely 226 to fail, may make fs 227 even more fragmented */ 228 #define OCFS2_MOVE_EXT_FL_COMPLETE (0x00000004) /* Move or defragmenation 229 completely gets done. 230 */ 231 232 #define OCFS2_IOC_MOVE_EXT _IOW('o', 6, struct ocfs2_move_extents) 233 234 #endif /* OCFS2_IOCTL_H */ 235
