1 /* 2 * Copyright (c) 2008 The DragonFly Project. All rights reserved. 3 * 4 * This code is derived from software contributed to The DragonFly Project 5 * by Matthew Dillon <dillon@backplane.com> 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in 15 * the documentation and/or other materials provided with the 16 * distribution. 17 * 3. Neither the name of The DragonFly Project nor the names of its 18 * contributors may be used to endorse or promote products derived 19 * from this software without specific, prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, 27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * $DragonFly: src/sys/vfs/hammer/hammer_ioctl.h,v 1.23 2008/11/13 02:18:43 dillon Exp $ 35 */ 36 /* 37 * HAMMER ioctl's. This file can be #included from userland 38 */ 39 40 #ifndef VFS_HAMMER_IOCTL_H_ 41 #define VFS_HAMMER_IOCTL_H_ 42 43 #include <sys/types.h> 44 #include <sys/ioccom.h> 45 #include "hammer_disk.h" 46 47 /* 48 * Common HAMMER ioctl header 49 * 50 * Global flags are stored in the upper 16 bits. 51 */ 52 struct hammer_ioc_head { 53 int32_t flags; 54 int32_t error; 55 int32_t reserved02[4]; 56 }; 57 58 #define HAMMER_IOC_HEAD_ERROR 0x00008000 59 #define HAMMER_IOC_HEAD_INTR 0x00010000 60 #define HAMMER_IOC_DO_BTREE 0x00020000 /* reblocker */ 61 #define HAMMER_IOC_DO_INODES 0x00040000 /* reblocker */ 62 #define HAMMER_IOC_DO_DATA 0x00080000 /* reblocker */ 63 #define HAMMER_IOC_DO_DIRS 0x00100000 /* reblocker */ 64 65 #define HAMMER_IOC_DO_FLAGS (HAMMER_IOC_DO_BTREE | \ 66 HAMMER_IOC_DO_INODES | \ 67 HAMMER_IOC_DO_DATA | \ 68 HAMMER_IOC_DO_DIRS) 69 70 /* 71 * HAMMERIOC_PRUNE 72 * 73 * beg/end TID ranges in the element array must be sorted in descending 74 * order, with the most recent (highest) range at elms[0]. 75 */ 76 struct hammer_ioc_prune_elm { 77 hammer_tid_t beg_tid; /* starting tid */ 78 hammer_tid_t end_tid; /* ending tid (non inclusive) */ 79 hammer_tid_t mod_tid; /* modulo */ 80 }; 81 82 #define HAMMER_MAX_PRUNE_ELMS (1024*1024/24) 83 84 struct hammer_ioc_prune { 85 struct hammer_ioc_head head; 86 int nelms; 87 int reserved01; 88 89 struct hammer_base_elm key_beg; /* stop forward scan (reverse scan) */ 90 struct hammer_base_elm key_end; /* start forward scan (reverse scan) */ 91 struct hammer_base_elm key_cur; /* scan interruption point */ 92 93 int64_t stat_scanrecords;/* number of records scanned */ 94 int64_t stat_rawrecords; /* number of raw records pruned */ 95 int64_t stat_dirrecords; /* number of dir records pruned */ 96 int64_t stat_bytes; /* number of data bytes pruned */ 97 int64_t stat_realignments; /* number of raw records realigned */ 98 hammer_tid_t stat_oldest_tid; /* oldest create_tid encountered */ 99 int64_t reserved02[6]; 100 struct hammer_ioc_prune_elm *elms; /* user supplied array */ 101 }; 102 103 #define HAMMER_IOC_PRUNE_ALL 0x0001 104 105 /* 106 * HAMMERIOC_REPACK 107 * 108 * Forward scan leaf-up B-Tree packing. The saturation point is typically 109 * set to HAMMER_BTREE_LEAF_ELMS * 2 / 3 for 2/3rds fill. Referenced nodes 110 * have to be skipped, we can't track cursors through pack ops. 111 */ 112 struct hammer_ioc_rebalance { 113 struct hammer_ioc_head head; 114 int saturation; /* saturation pt elements/node */ 115 int reserved02; 116 117 struct hammer_base_elm key_beg; /* start forward scan */ 118 struct hammer_base_elm key_end; /* stop forward scan (inclusive) */ 119 struct hammer_base_elm key_cur; /* current scan index */ 120 121 int64_t stat_ncount; /* number of nodes scanned */ 122 int64_t stat_deletions; /* number of nodes deleted */ 123 int64_t stat_collisions;/* number of collision retries */ 124 int64_t stat_nrebal; /* number of btree-nodes rebalanced */ 125 int64_t stat_unused04; 126 }; 127 128 /* 129 * HAMMERIOC_GETHISTORY 130 * 131 * Retrieve an array of ordered transaction ids >= beg and < end indicating 132 * all changes made to the specified object's inode up to the 133 * maximum. 134 * 135 * If ATKEY is set the key field indicates a particular key within the 136 * inode to retrieve the history for. 137 * 138 * On return count is set to the number of elements returned, nxt_tid is 139 * set to the tid the caller should store in beg_tid to continue the 140 * iteration, and nxt_key is set to the nearest key boundary > key 141 * indicating the range key - nxt_key (nxt_key non-inclusive) the tid 142 * array represents. Also obj_id is set to the object's inode number. 143 * 144 * nxt_key can be used to iterate the contents of a single file but should 145 * not be stored in key until all modifications at key have been retrieved. 146 * To work properly nxt_key should be initialized to HAMMER_MAX_KEY. 147 * Successive ioctl() calls will reduce nxt_key as appropriate so at the 148 * end of your iterating for 'key', key to nxt_key will represent the 149 * shortest range of keys that all returned TIDs apply to. 150 */ 151 152 #define HAMMER_MAX_HISTORY_ELMS 64 153 154 typedef struct hammer_ioc_hist_entry { 155 hammer_tid_t tid; 156 u_int32_t time32; 157 u_int32_t unused; 158 } *hammer_ioc_hist_entry_t; 159 160 struct hammer_ioc_history { 161 struct hammer_ioc_head head; 162 int64_t obj_id; 163 hammer_tid_t beg_tid; 164 hammer_tid_t nxt_tid; 165 hammer_tid_t end_tid; 166 int64_t key; 167 int64_t nxt_key; 168 int count; 169 int reserve01; 170 struct hammer_ioc_hist_entry hist_ary[HAMMER_MAX_HISTORY_ELMS]; 171 }; 172 173 #define HAMMER_IOC_HISTORY_ATKEY 0x0001 174 #define HAMMER_IOC_HISTORY_NEXT_TID 0x0002 /* iterate via nxt_tid */ 175 #define HAMMER_IOC_HISTORY_NEXT_KEY 0x0004 /* iterate via nxt_key */ 176 #define HAMMER_IOC_HISTORY_EOF 0x0008 /* no more keys */ 177 #define HAMMER_IOC_HISTORY_UNSYNCED 0x0010 /* unsynced info in inode */ 178 179 /* 180 * Reblock request 181 */ 182 struct hammer_ioc_reblock { 183 struct hammer_ioc_head head; 184 int32_t free_level; /* 0 for maximum compaction */ 185 u_int32_t reserved01; 186 187 struct hammer_base_elm key_beg; /* start forward scan */ 188 struct hammer_base_elm key_end; /* stop forward scan */ 189 struct hammer_base_elm key_cur; /* scan interruption point */ 190 191 int64_t btree_count; /* B-Tree nodes checked */ 192 int64_t record_count; /* Records checked */ 193 int64_t data_count; /* Data segments checked */ 194 int64_t data_byte_count; /* Data bytes checked */ 195 196 int64_t btree_moves; /* B-Tree nodes moved */ 197 int64_t record_moves; /* Records moved */ 198 int64_t data_moves; /* Data segments moved */ 199 int64_t data_byte_moves; /* Data bytes moved */ 200 201 int32_t unused02; 202 int32_t unused03; 203 }; 204 205 /* 206 * HAMMERIOC_SYNCTID 207 */ 208 enum hammer_synctid_op { 209 HAMMER_SYNCTID_NONE, /* no sync (TID will not be accurate) */ 210 HAMMER_SYNCTID_ASYNC, /* async (TID will not be accurate) */ 211 HAMMER_SYNCTID_SYNC1, /* single sync - might undo after crash */ 212 HAMMER_SYNCTID_SYNC2 /* double sync - guarantee no undo */ 213 }; 214 215 struct hammer_ioc_synctid { 216 struct hammer_ioc_head head; 217 enum hammer_synctid_op op; 218 hammer_tid_t tid; 219 }; 220 221 /* 222 * HAMMERIOC_GET_INFO 223 */ 224 struct hammer_ioc_info { 225 struct hammer_ioc_head head; 226 227 char vol_name[64]; 228 uuid_t vol_fsid; 229 uuid_t vol_fstype; 230 231 int version; 232 int nvolumes; 233 int reserved01; 234 int reserved02; 235 236 int64_t bigblocks; 237 int64_t freebigblocks; 238 int64_t rsvbigblocks; 239 int64_t inodes; 240 241 int64_t reservedext[16]; 242 }; 243 244 /* 245 * HAMMERIOC_GET_PSEUDOFS 246 * HAMMERIOC_SET_PSEUDOFS 247 */ 248 struct hammer_ioc_pseudofs_rw { 249 struct hammer_ioc_head head; 250 int pfs_id; 251 u_int32_t bytes; 252 u_int32_t version; 253 u_int32_t flags; 254 struct hammer_pseudofs_data *ondisk; 255 }; 256 257 #define HAMMER_IOC_PSEUDOFS_VERSION 1 258 259 #define HAMMER_IOC_PFS_SYNC_BEG 0x0001 260 #define HAMMER_IOC_PFS_SYNC_END 0x0002 261 #define HAMMER_IOC_PFS_SHARED_UUID 0x0004 262 #define HAMMER_IOC_PFS_MIRROR_UUID 0x0008 263 #define HAMMER_IOC_PFS_MASTER_ID 0x0010 264 #define HAMMER_IOC_PFS_MIRROR_FLAGS 0x0020 265 #define HAMMER_IOC_PFS_LABEL 0x0040 266 267 #define HAMMER_MAX_PFS 65536 268 269 /* 270 * HAMMERIOC_MIRROR_READ/WRITE 271 */ 272 struct hammer_ioc_mirror_rw { 273 struct hammer_ioc_head head; 274 struct hammer_base_elm key_beg; /* start forward scan */ 275 struct hammer_base_elm key_end; /* stop forward scan */ 276 struct hammer_base_elm key_cur; /* interruption point */ 277 hammer_tid_t tid_beg; /* filter modification range */ 278 hammer_tid_t tid_end; /* filter modification range */ 279 void *ubuf; /* user buffer */ 280 int count; /* current size */ 281 int size; /* max size */ 282 int pfs_id; /* PFS id being read/written */ 283 int reserved01; 284 uuid_t shared_uuid; /* validator for safety */ 285 }; 286 287 /* 288 * NOTE: crc is for the data block starting at rec_size, not including the 289 * data[] array. 290 */ 291 struct hammer_ioc_mrecord_head { 292 u_int32_t signature; /* signature for byte order */ 293 u_int32_t rec_crc; 294 u_int32_t rec_size; 295 u_int32_t type; 296 /* extended */ 297 }; 298 299 typedef struct hammer_ioc_mrecord_head *hammer_ioc_mrecord_head_t; 300 301 struct hammer_ioc_mrecord_rec { 302 struct hammer_ioc_mrecord_head head; 303 struct hammer_btree_leaf_elm leaf; 304 /* extended by data */ 305 }; 306 307 struct hammer_ioc_mrecord_skip { 308 struct hammer_ioc_mrecord_head head; 309 struct hammer_base_elm skip_beg; 310 struct hammer_base_elm skip_end; 311 }; 312 313 struct hammer_ioc_mrecord_update { 314 struct hammer_ioc_mrecord_head head; 315 hammer_tid_t tid; 316 }; 317 318 struct hammer_ioc_mrecord_sync { 319 struct hammer_ioc_mrecord_head head; 320 }; 321 322 struct hammer_ioc_mrecord_pfs { 323 struct hammer_ioc_mrecord_head head; 324 u_int32_t version; 325 u_int32_t reserved01; 326 struct hammer_pseudofs_data pfsd; 327 }; 328 329 struct hammer_ioc_version { 330 struct hammer_ioc_head head; 331 u_int32_t cur_version; 332 u_int32_t min_version; 333 u_int32_t wip_version; 334 u_int32_t max_version; 335 char description[64]; 336 }; 337 338 struct hammer_ioc_expand { 339 struct hammer_ioc_head head; 340 char device_name[MAXPATHLEN]; 341 int64_t vol_size; 342 int64_t boot_area_size; 343 int64_t mem_area_size; 344 }; 345 346 union hammer_ioc_mrecord_any { 347 struct hammer_ioc_mrecord_head head; 348 struct hammer_ioc_mrecord_rec rec; 349 struct hammer_ioc_mrecord_skip skip; 350 struct hammer_ioc_mrecord_update update; 351 struct hammer_ioc_mrecord_update sync; 352 struct hammer_ioc_mrecord_pfs pfs; 353 struct hammer_ioc_version version; 354 }; 355 356 typedef union hammer_ioc_mrecord_any *hammer_ioc_mrecord_any_t; 357 358 /* 359 * MREC types. Flags are in the upper 16 bits but some are also included 360 * in the type mask to force them into any switch() on the type. 361 * 362 * NOTE: Any record whos data is CRC-errored will have HAMMER_MRECF_CRC set, 363 * and the bit is also part of the type mask. 364 */ 365 #define HAMMER_MREC_TYPE_RESERVED 0 366 #define HAMMER_MREC_TYPE_REC 1 /* record w/ data */ 367 #define HAMMER_MREC_TYPE_PFSD 2 /* (userland only) */ 368 #define HAMMER_MREC_TYPE_UPDATE 3 /* (userland only) */ 369 #define HAMMER_MREC_TYPE_SYNC 4 /* (userland only) */ 370 #define HAMMER_MREC_TYPE_SKIP 5 /* skip-range */ 371 #define HAMMER_MREC_TYPE_PASS 6 /* record for cmp only (pass) */ 372 #define HAMMER_MREC_TYPE_TERM 7 /* (userland only) */ 373 #define HAMMER_MREC_TYPE_IDLE 8 /* (userland only) */ 374 375 #define HAMMER_MREC_TYPE_REC_BADCRC (HAMMER_MREC_TYPE_REC | \ 376 HAMMER_MRECF_CRC_ERROR) 377 378 #define HAMMER_MRECF_TYPE_LOMASK 0x000000FF 379 #define HAMMER_MRECF_TYPE_MASK 0x800000FF 380 #define HAMMER_MRECF_CRC_ERROR 0x80000000 381 382 #define HAMMER_MRECF_DATA_CRC_BAD 0x40000000 383 #define HAMMER_MRECF_RECD_CRC_BAD 0x20000000 384 385 #define HAMMER_MREC_CRCOFF (offsetof(struct hammer_ioc_mrecord_head, rec_size)) 386 #define HAMMER_MREC_HEADSIZE sizeof(struct hammer_ioc_mrecord_head) 387 388 #define HAMMER_IOC_MIRROR_SIGNATURE 0x4dd97272U 389 #define HAMMER_IOC_MIRROR_SIGNATURE_REV 0x7272d94dU 390 391 /* 392 * HAMMERIOC_ADD_SNAPSHOT - Add snapshot tid(s). 393 * HAMMERIOC_DEL_SNAPSHOT - Delete snapshot tids. 394 * HAMMERIOC_GET_SNAPSHOT - Get/continue retrieving snapshot tids. 395 * (finds restart point based on last snaps[] entry) 396 * 397 * These are per-PFS operations. 398 * 399 * NOTE: There is no limit on the number of snapshots, but there is a limit 400 * on how many can be set or returned in each ioctl. 401 * 402 * NOTE: ADD and DEL start at snap->index. If an error occurs the index will 403 * point at the errored record. snap->index must be set to 0 for GET. 404 */ 405 #define HAMMER_SNAPS_PER_IOCTL 16 406 407 #define HAMMER_IOC_SNAPSHOT_EOF 0x0008 /* no more keys */ 408 409 struct hammer_ioc_snapshot { 410 struct hammer_ioc_head head; 411 int unused01; 412 u_int32_t index; 413 u_int32_t count; 414 struct hammer_snapshot_data snaps[HAMMER_SNAPS_PER_IOCTL]; 415 }; 416 417 /* 418 * HAMMERIOC_GET_CONFIG 419 * HAMMERIOC_SET_CONFIG 420 * 421 * The configuration space is a freeform nul-terminated string, typically 422 * a text file. It is per-PFS and used by the 'hammer cleanup' utility. 423 * 424 * The configuration space is NOT mirrored. mirror-write will ignore 425 * configuration space records. 426 */ 427 struct hammer_ioc_config { 428 struct hammer_ioc_head head; 429 u_int32_t reserved01; 430 u_int32_t reserved02; 431 u_int64_t reserved03[4]; 432 struct hammer_config_data config; 433 }; 434 435 /* 436 * Ioctl cmd ids 437 */ 438 #define HAMMERIOC_PRUNE _IOWR('h',1,struct hammer_ioc_prune) 439 #define HAMMERIOC_GETHISTORY _IOWR('h',2,struct hammer_ioc_history) 440 #define HAMMERIOC_REBLOCK _IOWR('h',3,struct hammer_ioc_reblock) 441 #define HAMMERIOC_SYNCTID _IOWR('h',4,struct hammer_ioc_synctid) 442 #define HAMMERIOC_SET_PSEUDOFS _IOWR('h',5,struct hammer_ioc_pseudofs_rw) 443 #define HAMMERIOC_GET_PSEUDOFS _IOWR('h',6,struct hammer_ioc_pseudofs_rw) 444 #define HAMMERIOC_MIRROR_READ _IOWR('h',7,struct hammer_ioc_mirror_rw) 445 #define HAMMERIOC_MIRROR_WRITE _IOWR('h',8,struct hammer_ioc_mirror_rw) 446 #define HAMMERIOC_UPG_PSEUDOFS _IOWR('h',9,struct hammer_ioc_pseudofs_rw) 447 #define HAMMERIOC_DGD_PSEUDOFS _IOWR('h',10,struct hammer_ioc_pseudofs_rw) 448 #define HAMMERIOC_RMR_PSEUDOFS _IOWR('h',11,struct hammer_ioc_pseudofs_rw) 449 #define HAMMERIOC_WAI_PSEUDOFS _IOWR('h',12,struct hammer_ioc_pseudofs_rw) 450 #define HAMMERIOC_GET_VERSION _IOWR('h',13,struct hammer_ioc_version) 451 #define HAMMERIOC_SET_VERSION _IOWR('h',14,struct hammer_ioc_version) 452 #define HAMMERIOC_REBALANCE _IOWR('h',15,struct hammer_ioc_rebalance) 453 #define HAMMERIOC_GET_INFO _IOR('h',16,struct hammer_ioc_info) 454 #define HAMMERIOC_EXPAND _IOWR('h',17,struct hammer_ioc_expand) 455 #define HAMMERIOC_ADD_SNAPSHOT _IOWR('h',18,struct hammer_ioc_snapshot) 456 #define HAMMERIOC_DEL_SNAPSHOT _IOWR('h',19,struct hammer_ioc_snapshot) 457 #define HAMMERIOC_GET_SNAPSHOT _IOWR('h',20,struct hammer_ioc_snapshot) 458 #define HAMMERIOC_GET_CONFIG _IOWR('h',21,struct hammer_ioc_config) 459 #define HAMMERIOC_SET_CONFIG _IOWR('h',22,struct hammer_ioc_config) 460 461 #endif 462 463