1 /* 2 * Copyright (C) 2007 Oracle. All rights reserved. 3 * 4 * This program is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU General Public 6 * License v2 as published by the Free Software Foundation. 7 * 8 * This program is distributed in the hope that it will be useful, 9 * but WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 11 * General Public License for more details. 12 * 13 * You should have received a copy of the GNU General Public 14 * License along with this program; if not, write to the 15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330, 16 * Boston, MA 021110-1307, USA. 17 */ 18 19 #ifndef __IOCTL_ 20 #define __IOCTL_ 21 #include <linux/ioctl.h> 22 23 #define BTRFS_IOCTL_MAGIC 0x94 24 #define BTRFS_VOL_NAME_MAX 255 25 26 /* this should be 4k */ 27 #define BTRFS_PATH_NAME_MAX 4087 28 struct btrfs_ioctl_vol_args { 29 __s64 fd; 30 char name[BTRFS_PATH_NAME_MAX + 1]; 31 }; 32 33 #define BTRFS_SUBVOL_CREATE_ASYNC (1ULL << 0) 34 #define BTRFS_SUBVOL_RDONLY (1ULL << 1) 35 #define BTRFS_FSID_SIZE 16 36 #define BTRFS_UUID_SIZE 16 37 38 #define BTRFS_SUBVOL_NAME_MAX 4039 39 struct btrfs_ioctl_vol_args_v2 { 40 __s64 fd; 41 __u64 transid; 42 __u64 flags; 43 __u64 unused[4]; 44 char name[BTRFS_SUBVOL_NAME_MAX + 1]; 45 }; 46 47 /* 48 * structure to report errors and progress to userspace, either as a 49 * result of a finished scrub, a canceled scrub or a progress inquiry 50 */ 51 struct btrfs_scrub_progress { 52 __u64 data_extents_scrubbed; /* # of data extents scrubbed */ 53 __u64 tree_extents_scrubbed; /* # of tree extents scrubbed */ 54 __u64 data_bytes_scrubbed; /* # of data bytes scrubbed */ 55 __u64 tree_bytes_scrubbed; /* # of tree bytes scrubbed */ 56 __u64 read_errors; /* # of read errors encountered (EIO) */ 57 __u64 csum_errors; /* # of failed csum checks */ 58 __u64 verify_errors; /* # of occurences, where the metadata 59 * of a tree block did not match the 60 * expected values, like generation or 61 * logical */ 62 __u64 no_csum; /* # of 4k data block for which no csum 63 * is present, probably the result of 64 * data written with nodatasum */ 65 __u64 csum_discards; /* # of csum for which no data was found 66 * in the extent tree. */ 67 __u64 super_errors; /* # of bad super blocks encountered */ 68 __u64 malloc_errors; /* # of internal kmalloc errors. These 69 * will likely cause an incomplete 70 * scrub */ 71 __u64 uncorrectable_errors; /* # of errors where either no intact 72 * copy was found or the writeback 73 * failed */ 74 __u64 corrected_errors; /* # of errors corrected */ 75 __u64 last_physical; /* last physical address scrubbed. In 76 * case a scrub was aborted, this can 77 * be used to restart the scrub */ 78 __u64 unverified_errors; /* # of occurences where a read for a 79 * full (64k) bio failed, but the re- 80 * check succeeded for each 4k piece. 81 * Intermittent error. */ 82 }; 83 84 #define BTRFS_SCRUB_READONLY 1 85 struct btrfs_ioctl_scrub_args { 86 __u64 devid; /* in */ 87 __u64 start; /* in */ 88 __u64 end; /* in */ 89 __u64 flags; /* in */ 90 struct btrfs_scrub_progress progress; /* out */ 91 /* pad to 1k */ 92 __u64 unused[(1024-32-sizeof(struct btrfs_scrub_progress))/8]; 93 }; 94 95 #define BTRFS_DEVICE_PATH_NAME_MAX 1024 96 struct btrfs_ioctl_dev_info_args { 97 __u64 devid; /* in/out */ 98 __u8 uuid[BTRFS_UUID_SIZE]; /* in/out */ 99 __u64 bytes_used; /* out */ 100 __u64 total_bytes; /* out */ 101 __u64 unused[379]; /* pad to 4k */ 102 __u8 path[BTRFS_DEVICE_PATH_NAME_MAX]; /* out */ 103 }; 104 105 struct btrfs_ioctl_fs_info_args { 106 __u64 max_id; /* out */ 107 __u64 num_devices; /* out */ 108 __u8 fsid[BTRFS_FSID_SIZE]; /* out */ 109 __u64 reserved[124]; /* pad to 1k */ 110 }; 111 112 /* balance control ioctl modes */ 113 #define BTRFS_BALANCE_CTL_PAUSE 1 114 #define BTRFS_BALANCE_CTL_CANCEL 2 115 116 /* 117 * this is packed, because it should be exactly the same as its disk 118 * byte order counterpart (struct btrfs_disk_balance_args) 119 */ 120 struct btrfs_balance_args { 121 __u64 profiles; 122 __u64 usage; 123 __u64 devid; 124 __u64 pstart; 125 __u64 pend; 126 __u64 vstart; 127 __u64 vend; 128 129 __u64 target; 130 131 __u64 flags; 132 133 __u64 unused[8]; 134 } __attribute__ ((__packed__)); 135 136 /* report balance progress to userspace */ 137 struct btrfs_balance_progress { 138 __u64 expected; /* estimated # of chunks that will be 139 * relocated to fulfill the request */ 140 __u64 considered; /* # of chunks we have considered so far */ 141 __u64 completed; /* # of chunks relocated so far */ 142 }; 143 144 #define BTRFS_BALANCE_STATE_RUNNING (1ULL << 0) 145 #define BTRFS_BALANCE_STATE_PAUSE_REQ (1ULL << 1) 146 #define BTRFS_BALANCE_STATE_CANCEL_REQ (1ULL << 2) 147 148 struct btrfs_ioctl_balance_args { 149 __u64 flags; /* in/out */ 150 __u64 state; /* out */ 151 152 struct btrfs_balance_args data; /* in/out */ 153 struct btrfs_balance_args meta; /* in/out */ 154 struct btrfs_balance_args sys; /* in/out */ 155 156 struct btrfs_balance_progress stat; /* out */ 157 158 __u64 unused[72]; /* pad to 1k */ 159 }; 160 161 #define BTRFS_INO_LOOKUP_PATH_MAX 4080 162 struct btrfs_ioctl_ino_lookup_args { 163 __u64 treeid; 164 __u64 objectid; 165 char name[BTRFS_INO_LOOKUP_PATH_MAX]; 166 }; 167 168 struct btrfs_ioctl_search_key { 169 /* which root are we searching. 0 is the tree of tree roots */ 170 __u64 tree_id; 171 172 /* keys returned will be >= min and <= max */ 173 __u64 min_objectid; 174 __u64 max_objectid; 175 176 /* keys returned will be >= min and <= max */ 177 __u64 min_offset; 178 __u64 max_offset; 179 180 /* max and min transids to search for */ 181 __u64 min_transid; 182 __u64 max_transid; 183 184 /* keys returned will be >= min and <= max */ 185 __u32 min_type; 186 __u32 max_type; 187 188 /* 189 * how many items did userland ask for, and how many are we 190 * returning 191 */ 192 __u32 nr_items; 193 194 /* align to 64 bits */ 195 __u32 unused; 196 197 /* some extra for later */ 198 __u64 unused1; 199 __u64 unused2; 200 __u64 unused3; 201 __u64 unused4; 202 }; 203 204 struct btrfs_ioctl_search_header { 205 __u64 transid; 206 __u64 objectid; 207 __u64 offset; 208 __u32 type; 209 __u32 len; 210 }; 211 212 #define BTRFS_SEARCH_ARGS_BUFSIZE (4096 - sizeof(struct btrfs_ioctl_search_key)) 213 /* 214 * the buf is an array of search headers where 215 * each header is followed by the actual item 216 * the type field is expanded to 32 bits for alignment 217 */ 218 struct btrfs_ioctl_search_args { 219 struct btrfs_ioctl_search_key key; 220 char buf[BTRFS_SEARCH_ARGS_BUFSIZE]; 221 }; 222 223 struct btrfs_ioctl_clone_range_args { 224 __s64 src_fd; 225 __u64 src_offset, src_length; 226 __u64 dest_offset; 227 }; 228 229 /* flags for the defrag range ioctl */ 230 #define BTRFS_DEFRAG_RANGE_COMPRESS 1 231 #define BTRFS_DEFRAG_RANGE_START_IO 2 232 233 struct btrfs_ioctl_space_info { 234 __u64 flags; 235 __u64 total_bytes; 236 __u64 used_bytes; 237 }; 238 239 struct btrfs_ioctl_space_args { 240 __u64 space_slots; 241 __u64 total_spaces; 242 struct btrfs_ioctl_space_info spaces[0]; 243 }; 244 245 struct btrfs_data_container { 246 __u32 bytes_left; /* out -- bytes not needed to deliver output */ 247 __u32 bytes_missing; /* out -- additional bytes needed for result */ 248 __u32 elem_cnt; /* out */ 249 __u32 elem_missed; /* out */ 250 __u64 val[0]; /* out */ 251 }; 252 253 struct btrfs_ioctl_ino_path_args { 254 __u64 inum; /* in */ 255 __u64 size; /* in */ 256 __u64 reserved[4]; 257 /* struct btrfs_data_container *fspath; out */ 258 __u64 fspath; /* out */ 259 }; 260 261 struct btrfs_ioctl_logical_ino_args { 262 __u64 logical; /* in */ 263 __u64 size; /* in */ 264 __u64 reserved[4]; 265 /* struct btrfs_data_container *inodes; out */ 266 __u64 inodes; 267 }; 268 269 #define BTRFS_IOC_SNAP_CREATE _IOW(BTRFS_IOCTL_MAGIC, 1, \ 270 struct btrfs_ioctl_vol_args) 271 #define BTRFS_IOC_DEFRAG _IOW(BTRFS_IOCTL_MAGIC, 2, \ 272 struct btrfs_ioctl_vol_args) 273 #define BTRFS_IOC_RESIZE _IOW(BTRFS_IOCTL_MAGIC, 3, \ 274 struct btrfs_ioctl_vol_args) 275 #define BTRFS_IOC_SCAN_DEV _IOW(BTRFS_IOCTL_MAGIC, 4, \ 276 struct btrfs_ioctl_vol_args) 277 /* trans start and trans end are dangerous, and only for 278 * use by applications that know how to avoid the 279 * resulting deadlocks 280 */ 281 #define BTRFS_IOC_TRANS_START _IO(BTRFS_IOCTL_MAGIC, 6) 282 #define BTRFS_IOC_TRANS_END _IO(BTRFS_IOCTL_MAGIC, 7) 283 #define BTRFS_IOC_SYNC _IO(BTRFS_IOCTL_MAGIC, 8) 284 285 #define BTRFS_IOC_CLONE _IOW(BTRFS_IOCTL_MAGIC, 9, int) 286 #define BTRFS_IOC_ADD_DEV _IOW(BTRFS_IOCTL_MAGIC, 10, \ 287 struct btrfs_ioctl_vol_args) 288 #define BTRFS_IOC_RM_DEV _IOW(BTRFS_IOCTL_MAGIC, 11, \ 289 struct btrfs_ioctl_vol_args) 290 #define BTRFS_IOC_BALANCE _IOW(BTRFS_IOCTL_MAGIC, 12, \ 291 struct btrfs_ioctl_vol_args) 292 293 #define BTRFS_IOC_CLONE_RANGE _IOW(BTRFS_IOCTL_MAGIC, 13, \ 294 struct btrfs_ioctl_clone_range_args) 295 296 #define BTRFS_IOC_SUBVOL_CREATE _IOW(BTRFS_IOCTL_MAGIC, 14, \ 297 struct btrfs_ioctl_vol_args) 298 #define BTRFS_IOC_SNAP_DESTROY _IOW(BTRFS_IOCTL_MAGIC, 15, \ 299 struct btrfs_ioctl_vol_args) 300 #define BTRFS_IOC_DEFRAG_RANGE _IOW(BTRFS_IOCTL_MAGIC, 16, \ 301 struct btrfs_ioctl_defrag_range_args) 302 #define BTRFS_IOC_TREE_SEARCH _IOWR(BTRFS_IOCTL_MAGIC, 17, \ 303 struct btrfs_ioctl_search_args) 304 #define BTRFS_IOC_INO_LOOKUP _IOWR(BTRFS_IOCTL_MAGIC, 18, \ 305 struct btrfs_ioctl_ino_lookup_args) 306 #define BTRFS_IOC_DEFAULT_SUBVOL _IOW(BTRFS_IOCTL_MAGIC, 19, u64) 307 #define BTRFS_IOC_SPACE_INFO _IOWR(BTRFS_IOCTL_MAGIC, 20, \ 308 struct btrfs_ioctl_space_args) 309 #define BTRFS_IOC_START_SYNC _IOR(BTRFS_IOCTL_MAGIC, 24, __u64) 310 #define BTRFS_IOC_WAIT_SYNC _IOW(BTRFS_IOCTL_MAGIC, 22, __u64) 311 #define BTRFS_IOC_SNAP_CREATE_V2 _IOW(BTRFS_IOCTL_MAGIC, 23, \ 312 struct btrfs_ioctl_vol_args_v2) 313 #define BTRFS_IOC_SUBVOL_GETFLAGS _IOW(BTRFS_IOCTL_MAGIC, 25, __u64) 314 #define BTRFS_IOC_SUBVOL_SETFLAGS _IOW(BTRFS_IOCTL_MAGIC, 26, __u64) 315 #define BTRFS_IOC_SCRUB _IOWR(BTRFS_IOCTL_MAGIC, 27, \ 316 struct btrfs_ioctl_scrub_args) 317 #define BTRFS_IOC_SCRUB_CANCEL _IO(BTRFS_IOCTL_MAGIC, 28) 318 #define BTRFS_IOC_SCRUB_PROGRESS _IOWR(BTRFS_IOCTL_MAGIC, 29, \ 319 struct btrfs_ioctl_scrub_args) 320 #define BTRFS_IOC_DEV_INFO _IOWR(BTRFS_IOCTL_MAGIC, 30, \ 321 struct btrfs_ioctl_dev_info_args) 322 #define BTRFS_IOC_FS_INFO _IOR(BTRFS_IOCTL_MAGIC, 31, \ 323 struct btrfs_ioctl_fs_info_args) 324 #define BTRFS_IOC_BALANCE_V2 _IOWR(BTRFS_IOCTL_MAGIC, 32, \ 325 struct btrfs_ioctl_balance_args) 326 #define BTRFS_IOC_BALANCE_CTL _IOW(BTRFS_IOCTL_MAGIC, 33, int) 327 #define BTRFS_IOC_BALANCE_PROGRESS _IOR(BTRFS_IOCTL_MAGIC, 34, \ 328 struct btrfs_ioctl_balance_args) 329 #define BTRFS_IOC_INO_PATHS _IOWR(BTRFS_IOCTL_MAGIC, 35, \ 330 struct btrfs_ioctl_ino_path_args) 331 #define BTRFS_IOC_LOGICAL_INO _IOWR(BTRFS_IOCTL_MAGIC, 36, \ 332 struct btrfs_ioctl_ino_path_args) 333 334 #endif 335