sys/vfs/hammer/hammer_ioctl.h

   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 1.21.2.1 2008/08/02 21:24:28 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 /*
 107  * HAMMERIOC_GETHISTORY
 108  *
 109  * Retrieve an array of ordered transaction ids >= beg and < end indicating
 110  * all changes made to the specified object's inode up to the
 111  * maximum.
 112  *
 113  * If ATKEY is set the key field indicates a particular key within the
 114  * inode to retrieve the history for.
 115  *
 116  * On return count is set to the number of elements returned, nxt_tid is
 117  * set to the tid the caller should store in beg_tid to continue the
 118  * iteration, and nxt_key is set to the nearest key boundary > key
 119  * indicating the range key - nxt_key (nxt_key non-inclusive) the tid
 120  * array represents.  Also obj_id is set to the object's inode number.
 121  *
 122  * nxt_key can be used to iterate the contents of a single file but should
 123  * not be stored in key until all modifications at key have been retrieved.
 124  * To work properly nxt_key should be initialized to HAMMER_MAX_KEY.
 125  * Successive ioctl() calls will reduce nxt_key as appropriate so at the
 126  * end of your iterating for 'key', key to nxt_key will represent the
 127  * shortest range of keys that all returned TIDs apply to.
 128  */
 129
 130 #define HAMMER_MAX_HISTORY_ELMS 64
 131
 132 typedef struct hammer_ioc_hist_entry {
 133         hammer_tid_t    tid;
 134         u_int32_t       time32;
 135         u_int32_t       unused;
 136 } *hammer_ioc_hist_entry_t;
 137
 138 struct hammer_ioc_history {
 139         struct hammer_ioc_head head;
 140         int64_t         obj_id;
 141         hammer_tid_t    beg_tid;
 142         hammer_tid_t    nxt_tid;
 143         hammer_tid_t    end_tid;
 144         int64_t         key;
 145         int64_t         nxt_key;
 146         int             count;
 147         int             reserve01;
 148         struct hammer_ioc_hist_entry hist_ary[HAMMER_MAX_HISTORY_ELMS];
 149 };
 150
 151 #define HAMMER_IOC_HISTORY_ATKEY        0x0001
 152 #define HAMMER_IOC_HISTORY_NEXT_TID     0x0002  /* iterate via nxt_tid */
 153 #define HAMMER_IOC_HISTORY_NEXT_KEY     0x0004  /* iterate via nxt_key */
 154 #define HAMMER_IOC_HISTORY_EOF          0x0008  /* no more keys */
 155 #define HAMMER_IOC_HISTORY_UNSYNCED     0x0010  /* unsynced info in inode */
 156
 157 /*
 158  * Reblock request
 159  */
 160 struct hammer_ioc_reblock {
 161         struct hammer_ioc_head head;
 162         int32_t         free_level;             /* 0 for maximum compaction */
 163         u_int32_t       reserved01;
 164
 165         struct hammer_base_elm key_beg;         /* start forward scan */
 166         struct hammer_base_elm key_end;         /* stop forward scan */
 167         struct hammer_base_elm key_cur;         /* scan interruption point */
 168
 169         int64_t         btree_count;            /* B-Tree nodes checked */
 170         int64_t         record_count;           /* Records checked */
 171         int64_t         data_count;             /* Data segments checked */
 172         int64_t         data_byte_count;        /* Data bytes checked */
 173
 174         int64_t         btree_moves;            /* B-Tree nodes moved */
 175         int64_t         record_moves;           /* Records moved */
 176         int64_t         data_moves;             /* Data segments moved */
 177         int64_t         data_byte_moves;        /* Data bytes moved */
 178
 179         int32_t         unused02;
 180         int32_t         unused03;
 181 };
 182
 183 /*
 184  * HAMMERIOC_SYNCTID
 185  */
 186 enum hammer_synctid_op {
 187         HAMMER_SYNCTID_NONE,    /* no sync (TID will not be accurate) */
 188         HAMMER_SYNCTID_ASYNC,   /* async (TID will not be accurate) */
 189         HAMMER_SYNCTID_SYNC1,   /* single sync - might undo after crash */
 190         HAMMER_SYNCTID_SYNC2    /* double sync - guarantee no undo */
 191 };
 192
 193 struct hammer_ioc_synctid {
 194         struct hammer_ioc_head  head;
 195         enum hammer_synctid_op  op;
 196         hammer_tid_t            tid;
 197 };
 198
 199 /*
 200  * HAMMERIOC_GET_PSEUDOFS
 201  * HAMMERIOC_SET_PSEUDOFS
 202  */
 203 struct hammer_ioc_pseudofs_rw {
 204         struct hammer_ioc_head  head;
 205         int                     pfs_id;
 206         u_int32_t               bytes;
 207         u_int32_t               version;
 208         u_int32_t               flags;
 209         struct hammer_pseudofs_data *ondisk;
 210 };
 211
 212 #define HAMMER_IOC_PSEUDOFS_VERSION     1
 213
 214 #define HAMMER_IOC_PFS_SYNC_BEG         0x0001
 215 #define HAMMER_IOC_PFS_SYNC_END         0x0002
 216 #define HAMMER_IOC_PFS_SHARED_UUID      0x0004
 217 #define HAMMER_IOC_PFS_MIRROR_UUID      0x0008
 218 #define HAMMER_IOC_PFS_MASTER_ID        0x0010
 219 #define HAMMER_IOC_PFS_MIRROR_FLAGS     0x0020
 220 #define HAMMER_IOC_PFS_LABEL            0x0040
 221
 222 #define HAMMER_MAX_PFS                  65536
 223
 224 /*
 225  * HAMMERIOC_MIRROR_READ/WRITE
 226  */
 227 struct hammer_ioc_mirror_rw {
 228         struct hammer_ioc_head  head;
 229         struct hammer_base_elm  key_beg;        /* start forward scan */
 230         struct hammer_base_elm  key_end;        /* stop forward scan */
 231         struct hammer_base_elm  key_cur;        /* interruption point */
 232         hammer_tid_t            tid_beg;        /* filter modification range */
 233         hammer_tid_t            tid_end;        /* filter modification range */
 234         void                    *ubuf;          /* user buffer */
 235         int                     count;          /* current size */
 236         int                     size;           /* max size */
 237         int                     pfs_id;         /* PFS id being read/written */
 238         int                     reserved01;
 239         uuid_t                  shared_uuid;    /* validator for safety */
 240 };
 241
 242 /*
 243  * NOTE: crc is for the data block starting at rec_size, not including the
 244  * data[] array.
 245  */
 246 struct hammer_ioc_mrecord_head {
 247         u_int32_t               signature;      /* signature for byte order */
 248         u_int32_t               rec_crc;
 249         u_int32_t               rec_size;
 250         u_int32_t               type;
 251         /* extended */
 252 };
 253
 254 typedef struct hammer_ioc_mrecord_head *hammer_ioc_mrecord_head_t;
 255
 256 struct hammer_ioc_mrecord_rec {
 257         struct hammer_ioc_mrecord_head  head;
 258         struct hammer_btree_leaf_elm    leaf;
 259         /* extended by data */
 260 };
 261
 262 struct hammer_ioc_mrecord_skip {
 263         struct hammer_ioc_mrecord_head  head;
 264         struct hammer_base_elm          skip_beg;
 265         struct hammer_base_elm          skip_end;
 266 };
 267
 268 struct hammer_ioc_mrecord_update {
 269         struct hammer_ioc_mrecord_head  head;
 270         hammer_tid_t                    tid;
 271 };
 272
 273 struct hammer_ioc_mrecord_sync {
 274         struct hammer_ioc_mrecord_head  head;
 275 };
 276
 277 struct hammer_ioc_mrecord_pfs {
 278         struct hammer_ioc_mrecord_head  head;
 279         u_int32_t                       version;
 280         u_int32_t                       reserved01;
 281         struct hammer_pseudofs_data     pfsd;
 282 };
 283
 284 union hammer_ioc_mrecord_any {
 285         struct hammer_ioc_mrecord_head  head;
 286         struct hammer_ioc_mrecord_rec   rec;
 287         struct hammer_ioc_mrecord_skip  skip;
 288         struct hammer_ioc_mrecord_update update;
 289         struct hammer_ioc_mrecord_update sync;
 290         struct hammer_ioc_mrecord_pfs   pfs;
 291 };
 292
 293 typedef union hammer_ioc_mrecord_any *hammer_ioc_mrecord_any_t;
 294
 295 #define HAMMER_MREC_TYPE_RESERVED       0
 296 #define HAMMER_MREC_TYPE_REC            1       /* record w/ data */
 297 #define HAMMER_MREC_TYPE_PFSD           2       /* (userland only) */
 298 #define HAMMER_MREC_TYPE_UPDATE         3       /* (userland only) */
 299 #define HAMMER_MREC_TYPE_SYNC           4       /* (userland only) */
 300 #define HAMMER_MREC_TYPE_SKIP           5       /* skip-range */
 301 #define HAMMER_MREC_TYPE_PASS           6       /* record for cmp only (pass) */
 302 #define HAMMER_MREC_TYPE_TERM           7       /* (userland only) */
 303 #define HAMMER_MREC_TYPE_IDLE           8       /* (userland only) */
 304
 305 #define HAMMER_MREC_CRCOFF      (offsetof(struct hammer_ioc_mrecord_head, rec_size))
 306 #define HAMMER_MREC_HEADSIZE    sizeof(struct hammer_ioc_mrecord_head)
 307
 308 #define HAMMER_IOC_MIRROR_SIGNATURE     0x4dd97272U
 309 #define HAMMER_IOC_MIRROR_SIGNATURE_REV 0x7272d94dU
 310
 311 /*
 312  * Ioctl cmd ids
 313  */
 314
 315 #define HAMMERIOC_PRUNE         _IOWR('h',1,struct hammer_ioc_prune)
 316 #define HAMMERIOC_GETHISTORY    _IOWR('h',2,struct hammer_ioc_history)
 317 #define HAMMERIOC_REBLOCK       _IOWR('h',3,struct hammer_ioc_reblock)
 318 #define HAMMERIOC_SYNCTID       _IOWR('h',4,struct hammer_ioc_synctid)
 319 #define HAMMERIOC_SET_PSEUDOFS  _IOWR('h',5,struct hammer_ioc_pseudofs_rw)
 320 #define HAMMERIOC_GET_PSEUDOFS  _IOWR('h',6,struct hammer_ioc_pseudofs_rw)
 321 #define HAMMERIOC_MIRROR_READ   _IOWR('h',7,struct hammer_ioc_mirror_rw)
 322 #define HAMMERIOC_MIRROR_WRITE  _IOWR('h',8,struct hammer_ioc_mirror_rw)
 323 #define HAMMERIOC_UPG_PSEUDOFS  _IOWR('h',9,struct hammer_ioc_pseudofs_rw)
 324 #define HAMMERIOC_DGD_PSEUDOFS  _IOWR('h',10,struct hammer_ioc_pseudofs_rw)
 325 #define HAMMERIOC_RMR_PSEUDOFS  _IOWR('h',11,struct hammer_ioc_pseudofs_rw)
 326 #define HAMMERIOC_WAI_PSEUDOFS  _IOWR('h',12,struct hammer_ioc_pseudofs_rw)
 327
 328 #endif
 329