include/uapi/linux/btrfs.h

   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 _UAPI_LINUX_BTRFS_H
  20 #define _UAPI_LINUX_BTRFS_H
  21 #include <linux/types.h>
  22 #include <linux/ioctl.h>
  23
  24 #define BTRFS_IOCTL_MAGIC 0x94
  25 #define BTRFS_VOL_NAME_MAX 255
  26 #define BTRFS_LABEL_SIZE 256
  27
  28 /* this should be 4k */
  29 #define BTRFS_PATH_NAME_MAX 4087
  30 struct btrfs_ioctl_vol_args {
  31         __s64 fd;
  32         char name[BTRFS_PATH_NAME_MAX + 1];
  33 };
  34
  35 #define BTRFS_DEVICE_PATH_NAME_MAX 1024
  36
  37 #define BTRFS_DEVICE_SPEC_BY_ID         (1ULL << 3)
  38
  39 #define BTRFS_VOL_ARG_V2_FLAGS_SUPPORTED                \
  40                         (BTRFS_SUBVOL_CREATE_ASYNC |    \
  41                         BTRFS_SUBVOL_RDONLY |           \
  42                         BTRFS_SUBVOL_QGROUP_INHERIT |   \
  43                         BTRFS_DEVICE_SPEC_BY_ID)
  44
  45 #define BTRFS_FSID_SIZE 16
  46 #define BTRFS_UUID_SIZE 16
  47 #define BTRFS_UUID_UNPARSED_SIZE        37
  48
  49 /*
  50  * flags definition for qgroup limits
  51  *
  52  * Used by:
  53  * struct btrfs_qgroup_limit.flags
  54  * struct btrfs_qgroup_limit_item.flags
  55  */
  56 #define BTRFS_QGROUP_LIMIT_MAX_RFER     (1ULL << 0)
  57 #define BTRFS_QGROUP_LIMIT_MAX_EXCL     (1ULL << 1)
  58 #define BTRFS_QGROUP_LIMIT_RSV_RFER     (1ULL << 2)
  59 #define BTRFS_QGROUP_LIMIT_RSV_EXCL     (1ULL << 3)
  60 #define BTRFS_QGROUP_LIMIT_RFER_CMPR    (1ULL << 4)
  61 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR    (1ULL << 5)
  62
  63 struct btrfs_qgroup_limit {
  64         __u64   flags;
  65         __u64   max_rfer;
  66         __u64   max_excl;
  67         __u64   rsv_rfer;
  68         __u64   rsv_excl;
  69 };
  70
  71 /*
  72  * flags definition for qgroup inheritance
  73  *
  74  * Used by:
  75  * struct btrfs_qgroup_inherit.flags
  76  */
  77 #define BTRFS_QGROUP_INHERIT_SET_LIMITS (1ULL << 0)
  78
  79 struct btrfs_qgroup_inherit {
  80         __u64   flags;
  81         __u64   num_qgroups;
  82         __u64   num_ref_copies;
  83         __u64   num_excl_copies;
  84         struct btrfs_qgroup_limit lim;
  85         __u64   qgroups[0];
  86 };
  87
  88 struct btrfs_ioctl_qgroup_limit_args {
  89         __u64   qgroupid;
  90         struct btrfs_qgroup_limit lim;
  91 };
  92
  93 /*
  94  * flags for subvolumes
  95  *
  96  * Used by:
  97  * struct btrfs_ioctl_vol_args_v2.flags
  98  *
  99  * BTRFS_SUBVOL_RDONLY is also provided/consumed by the following ioctls:
 100  * - BTRFS_IOC_SUBVOL_GETFLAGS
 101  * - BTRFS_IOC_SUBVOL_SETFLAGS
 102  */
 103 #define BTRFS_SUBVOL_CREATE_ASYNC       (1ULL << 0)
 104 #define BTRFS_SUBVOL_RDONLY             (1ULL << 1)
 105 #define BTRFS_SUBVOL_QGROUP_INHERIT     (1ULL << 2)
 106
 107 #define BTRFS_SUBVOL_NAME_MAX 4039
 108 struct btrfs_ioctl_vol_args_v2 {
 109         __s64 fd;
 110         __u64 transid;
 111         __u64 flags;
 112         union {
 113                 struct {
 114                         __u64 size;
 115                         struct btrfs_qgroup_inherit __user *qgroup_inherit;
 116                 };
 117                 __u64 unused[4];
 118         };
 119         union {
 120                 char name[BTRFS_SUBVOL_NAME_MAX + 1];
 121                 __u64 devid;
 122         };
 123 };
 124
 125 /*
 126  * structure to report errors and progress to userspace, either as a
 127  * result of a finished scrub, a canceled scrub or a progress inquiry
 128  */
 129 struct btrfs_scrub_progress {
 130         __u64 data_extents_scrubbed;    /* # of data extents scrubbed */
 131         __u64 tree_extents_scrubbed;    /* # of tree extents scrubbed */
 132         __u64 data_bytes_scrubbed;      /* # of data bytes scrubbed */
 133         __u64 tree_bytes_scrubbed;      /* # of tree bytes scrubbed */
 134         __u64 read_errors;              /* # of read errors encountered (EIO) */
 135         __u64 csum_errors;              /* # of failed csum checks */
 136         __u64 verify_errors;            /* # of occurences, where the metadata
 137                                          * of a tree block did not match the
 138                                          * expected values, like generation or
 139                                          * logical */
 140         __u64 no_csum;                  /* # of 4k data block for which no csum
 141                                          * is present, probably the result of
 142                                          * data written with nodatasum */
 143         __u64 csum_discards;            /* # of csum for which no data was found
 144                                          * in the extent tree. */
 145         __u64 super_errors;             /* # of bad super blocks encountered */
 146         __u64 malloc_errors;            /* # of internal kmalloc errors. These
 147                                          * will likely cause an incomplete
 148                                          * scrub */
 149         __u64 uncorrectable_errors;     /* # of errors where either no intact
 150                                          * copy was found or the writeback
 151                                          * failed */
 152         __u64 corrected_errors;         /* # of errors corrected */
 153         __u64 last_physical;            /* last physical address scrubbed. In
 154                                          * case a scrub was aborted, this can
 155                                          * be used to restart the scrub */
 156         __u64 unverified_errors;        /* # of occurences where a read for a
 157                                          * full (64k) bio failed, but the re-
 158                                          * check succeeded for each 4k piece.
 159                                          * Intermittent error. */
 160 };
 161
 162 #define BTRFS_SCRUB_READONLY    1
 163 struct btrfs_ioctl_scrub_args {
 164         __u64 devid;                            /* in */
 165         __u64 start;                            /* in */
 166         __u64 end;                              /* in */
 167         __u64 flags;                            /* in */
 168         struct btrfs_scrub_progress progress;   /* out */
 169         /* pad to 1k */
 170         __u64 unused[(1024-32-sizeof(struct btrfs_scrub_progress))/8];
 171 };
 172
 173 #define BTRFS_IOCTL_DEV_REPLACE_CONT_READING_FROM_SRCDEV_MODE_ALWAYS    0
 174 #define BTRFS_IOCTL_DEV_REPLACE_CONT_READING_FROM_SRCDEV_MODE_AVOID     1
 175 struct btrfs_ioctl_dev_replace_start_params {
 176         __u64 srcdevid; /* in, if 0, use srcdev_name instead */
 177         __u64 cont_reading_from_srcdev_mode;    /* in, see #define
 178                                                  * above */
 179         __u8 srcdev_name[BTRFS_DEVICE_PATH_NAME_MAX + 1];       /* in */
 180         __u8 tgtdev_name[BTRFS_DEVICE_PATH_NAME_MAX + 1];       /* in */
 181 };
 182
 183 #define BTRFS_IOCTL_DEV_REPLACE_STATE_NEVER_STARTED     0
 184 #define BTRFS_IOCTL_DEV_REPLACE_STATE_STARTED           1
 185 #define BTRFS_IOCTL_DEV_REPLACE_STATE_FINISHED          2
 186 #define BTRFS_IOCTL_DEV_REPLACE_STATE_CANCELED          3
 187 #define BTRFS_IOCTL_DEV_REPLACE_STATE_SUSPENDED         4
 188 struct btrfs_ioctl_dev_replace_status_params {
 189         __u64 replace_state;    /* out, see #define above */
 190         __u64 progress_1000;    /* out, 0 <= x <= 1000 */
 191         __u64 time_started;     /* out, seconds since 1-Jan-1970 */
 192         __u64 time_stopped;     /* out, seconds since 1-Jan-1970 */
 193         __u64 num_write_errors; /* out */
 194         __u64 num_uncorrectable_read_errors;    /* out */
 195 };
 196
 197 #define BTRFS_IOCTL_DEV_REPLACE_CMD_START                       0
 198 #define BTRFS_IOCTL_DEV_REPLACE_CMD_STATUS                      1
 199 #define BTRFS_IOCTL_DEV_REPLACE_CMD_CANCEL                      2
 200 #define BTRFS_IOCTL_DEV_REPLACE_RESULT_NO_ERROR                 0
 201 #define BTRFS_IOCTL_DEV_REPLACE_RESULT_NOT_STARTED              1
 202 #define BTRFS_IOCTL_DEV_REPLACE_RESULT_ALREADY_STARTED          2
 203 #define BTRFS_IOCTL_DEV_REPLACE_RESULT_SCRUB_INPROGRESS         3
 204 struct btrfs_ioctl_dev_replace_args {
 205         __u64 cmd;      /* in */
 206         __u64 result;   /* out */
 207
 208         union {
 209                 struct btrfs_ioctl_dev_replace_start_params start;
 210                 struct btrfs_ioctl_dev_replace_status_params status;
 211         };      /* in/out */
 212
 213         __u64 spare[64];
 214 };
 215
 216 struct btrfs_ioctl_dev_info_args {
 217         __u64 devid;                            /* in/out */
 218         __u8 uuid[BTRFS_UUID_SIZE];             /* in/out */
 219         __u64 bytes_used;                       /* out */
 220         __u64 total_bytes;                      /* out */
 221         __u64 unused[379];                      /* pad to 4k */
 222         __u8 path[BTRFS_DEVICE_PATH_NAME_MAX];  /* out */
 223 };
 224
 225 struct btrfs_ioctl_fs_info_args {
 226         __u64 max_id;                           /* out */
 227         __u64 num_devices;                      /* out */
 228         __u8 fsid[BTRFS_FSID_SIZE];             /* out */
 229         __u32 nodesize;                         /* out */
 230         __u32 sectorsize;                       /* out */
 231         __u32 clone_alignment;                  /* out */
 232         __u32 reserved32;
 233         __u64 reserved[122];                    /* pad to 1k */
 234 };
 235
 236 /*
 237  * feature flags
 238  *
 239  * Used by:
 240  * struct btrfs_ioctl_feature_flags
 241  */
 242 #define BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE (1ULL << 0)
 243
 244 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF    (1ULL << 0)
 245 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL   (1ULL << 1)
 246 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS     (1ULL << 2)
 247 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO     (1ULL << 3)
 248 /*
 249  * some patches floated around with a second compression method
 250  * lets save that incompat here for when they do get in
 251  * Note we don't actually support it, we're just reserving the
 252  * number
 253  */
 254 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2   (1ULL << 4)
 255
 256 /*
 257  * older kernels tried to do bigger metadata blocks, but the
 258  * code was pretty buggy.  Lets not let them try anymore.
 259  */
 260 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA     (1ULL << 5)
 261
 262 #define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF    (1ULL << 6)
 263 #define BTRFS_FEATURE_INCOMPAT_RAID56           (1ULL << 7)
 264 #define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA  (1ULL << 8)
 265 #define BTRFS_FEATURE_INCOMPAT_NO_HOLES         (1ULL << 9)
 266
 267 struct btrfs_ioctl_feature_flags {
 268         __u64 compat_flags;
 269         __u64 compat_ro_flags;
 270         __u64 incompat_flags;
 271 };
 272
 273 /* balance control ioctl modes */
 274 #define BTRFS_BALANCE_CTL_PAUSE         1
 275 #define BTRFS_BALANCE_CTL_CANCEL        2
 276
 277 /*
 278  * this is packed, because it should be exactly the same as its disk
 279  * byte order counterpart (struct btrfs_disk_balance_args)
 280  */
 281 struct btrfs_balance_args {
 282         __u64 profiles;
 283         union {
 284                 __le64 usage;
 285                 struct {
 286                         __le32 usage_min;
 287                         __le32 usage_max;
 288                 };
 289         };
 290         __u64 devid;
 291         __u64 pstart;
 292         __u64 pend;
 293         __u64 vstart;
 294         __u64 vend;
 295
 296         __u64 target;
 297
 298         __u64 flags;
 299
 300         /*
 301          * BTRFS_BALANCE_ARGS_LIMIT with value 'limit'
 302          * BTRFS_BALANCE_ARGS_LIMIT_RANGE - the extend version can use minimum
 303          * and maximum
 304          */
 305         union {
 306                 __u64 limit;            /* limit number of processed chunks */
 307                 struct {
 308                         __u32 limit_min;
 309                         __u32 limit_max;
 310                 };
 311         };
 312
 313         /*
 314          * Process chunks that cross stripes_min..stripes_max devices,
 315          * BTRFS_BALANCE_ARGS_STRIPES_RANGE
 316          */
 317         __le32 stripes_min;
 318         __le32 stripes_max;
 319
 320         __u64 unused[6];
 321 } __attribute__ ((__packed__));
 322
 323 /* report balance progress to userspace */
 324 struct btrfs_balance_progress {
 325         __u64 expected;         /* estimated # of chunks that will be
 326                                  * relocated to fulfill the request */
 327         __u64 considered;       /* # of chunks we have considered so far */
 328         __u64 completed;        /* # of chunks relocated so far */
 329 };
 330
 331 /*
 332  * flags definition for balance
 333  *
 334  * Restriper's general type filter
 335  *
 336  * Used by:
 337  * btrfs_ioctl_balance_args.flags
 338  * btrfs_balance_control.flags (internal)
 339  */
 340 #define BTRFS_BALANCE_DATA              (1ULL << 0)
 341 #define BTRFS_BALANCE_SYSTEM            (1ULL << 1)
 342 #define BTRFS_BALANCE_METADATA          (1ULL << 2)
 343
 344 #define BTRFS_BALANCE_TYPE_MASK         (BTRFS_BALANCE_DATA |       \
 345                                          BTRFS_BALANCE_SYSTEM |     \
 346                                          BTRFS_BALANCE_METADATA)
 347
 348 #define BTRFS_BALANCE_FORCE             (1ULL << 3)
 349 #define BTRFS_BALANCE_RESUME            (1ULL << 4)
 350
 351 /*
 352  * flags definitions for per-type balance args
 353  *
 354  * Balance filters
 355  *
 356  * Used by:
 357  * struct btrfs_balance_args
 358  */
 359 #define BTRFS_BALANCE_ARGS_PROFILES     (1ULL << 0)
 360 #define BTRFS_BALANCE_ARGS_USAGE        (1ULL << 1)
 361 #define BTRFS_BALANCE_ARGS_DEVID        (1ULL << 2)
 362 #define BTRFS_BALANCE_ARGS_DRANGE       (1ULL << 3)
 363 #define BTRFS_BALANCE_ARGS_VRANGE       (1ULL << 4)
 364 #define BTRFS_BALANCE_ARGS_LIMIT        (1ULL << 5)
 365 #define BTRFS_BALANCE_ARGS_LIMIT_RANGE  (1ULL << 6)
 366 #define BTRFS_BALANCE_ARGS_STRIPES_RANGE (1ULL << 7)
 367 #define BTRFS_BALANCE_ARGS_USAGE_RANGE  (1ULL << 10)
 368
 369 #define BTRFS_BALANCE_ARGS_MASK                 \
 370         (BTRFS_BALANCE_ARGS_PROFILES |          \
 371          BTRFS_BALANCE_ARGS_USAGE |             \
 372          BTRFS_BALANCE_ARGS_DEVID |             \
 373          BTRFS_BALANCE_ARGS_DRANGE |            \
 374          BTRFS_BALANCE_ARGS_VRANGE |            \
 375          BTRFS_BALANCE_ARGS_LIMIT |             \
 376          BTRFS_BALANCE_ARGS_LIMIT_RANGE |       \
 377          BTRFS_BALANCE_ARGS_STRIPES_RANGE |     \
 378          BTRFS_BALANCE_ARGS_USAGE_RANGE)
 379
 380 /*
 381  * Profile changing flags.  When SOFT is set we won't relocate chunk if
 382  * it already has the target profile (even though it may be
 383  * half-filled).
 384  */
 385 #define BTRFS_BALANCE_ARGS_CONVERT      (1ULL << 8)
 386 #define BTRFS_BALANCE_ARGS_SOFT         (1ULL << 9)
 387
 388
 389 /*
 390  * flags definition for balance state
 391  *
 392  * Used by:
 393  * struct btrfs_ioctl_balance_args.state
 394  */
 395 #define BTRFS_BALANCE_STATE_RUNNING     (1ULL << 0)
 396 #define BTRFS_BALANCE_STATE_PAUSE_REQ   (1ULL << 1)
 397 #define BTRFS_BALANCE_STATE_CANCEL_REQ  (1ULL << 2)
 398
 399 struct btrfs_ioctl_balance_args {
 400         __u64 flags;                            /* in/out */
 401         __u64 state;                            /* out */
 402
 403         struct btrfs_balance_args data;         /* in/out */
 404         struct btrfs_balance_args meta;         /* in/out */
 405         struct btrfs_balance_args sys;          /* in/out */
 406
 407         struct btrfs_balance_progress stat;     /* out */
 408
 409         __u64 unused[72];                       /* pad to 1k */
 410 };
 411
 412 #define BTRFS_INO_LOOKUP_PATH_MAX 4080
 413 struct btrfs_ioctl_ino_lookup_args {
 414         __u64 treeid;
 415         __u64 objectid;
 416         char name[BTRFS_INO_LOOKUP_PATH_MAX];
 417 };
 418
 419 struct btrfs_ioctl_search_key {
 420         /* which root are we searching.  0 is the tree of tree roots */
 421         __u64 tree_id;
 422
 423         /* keys returned will be >= min and <= max */
 424         __u64 min_objectid;
 425         __u64 max_objectid;
 426
 427         /* keys returned will be >= min and <= max */
 428         __u64 min_offset;
 429         __u64 max_offset;
 430
 431         /* max and min transids to search for */
 432         __u64 min_transid;
 433         __u64 max_transid;
 434
 435         /* keys returned will be >= min and <= max */
 436         __u32 min_type;
 437         __u32 max_type;
 438
 439         /*
 440          * how many items did userland ask for, and how many are we
 441          * returning
 442          */
 443         __u32 nr_items;
 444
 445         /* align to 64 bits */
 446         __u32 unused;
 447
 448         /* some extra for later */
 449         __u64 unused1;
 450         __u64 unused2;
 451         __u64 unused3;
 452         __u64 unused4;
 453 };
 454
 455 struct btrfs_ioctl_search_header {
 456         __u64 transid;
 457         __u64 objectid;
 458         __u64 offset;
 459         __u32 type;
 460         __u32 len;
 461 };
 462
 463 #define BTRFS_SEARCH_ARGS_BUFSIZE (4096 - sizeof(struct btrfs_ioctl_search_key))
 464 /*
 465  * the buf is an array of search headers where
 466  * each header is followed by the actual item
 467  * the type field is expanded to 32 bits for alignment
 468  */
 469 struct btrfs_ioctl_search_args {
 470         struct btrfs_ioctl_search_key key;
 471         char buf[BTRFS_SEARCH_ARGS_BUFSIZE];
 472 };
 473
 474 struct btrfs_ioctl_search_args_v2 {
 475         struct btrfs_ioctl_search_key key; /* in/out - search parameters */
 476         __u64 buf_size;            /* in - size of buffer
 477                                             * out - on EOVERFLOW: needed size
 478                                             *       to store item */
 479         __u64 buf[0];                       /* out - found items */
 480 };
 481
 482 struct btrfs_ioctl_clone_range_args {
 483   __s64 src_fd;
 484   __u64 src_offset, src_length;
 485   __u64 dest_offset;
 486 };
 487
 488 /*
 489  * flags definition for the defrag range ioctl
 490  *
 491  * Used by:
 492  * struct btrfs_ioctl_defrag_range_args.flags
 493  */
 494 #define BTRFS_DEFRAG_RANGE_COMPRESS 1
 495 #define BTRFS_DEFRAG_RANGE_START_IO 2
 496 struct btrfs_ioctl_defrag_range_args {
 497         /* start of the defrag operation */
 498         __u64 start;
 499
 500         /* number of bytes to defrag, use (u64)-1 to say all */
 501         __u64 len;
 502
 503         /*
 504          * flags for the operation, which can include turning
 505          * on compression for this one defrag
 506          */
 507         __u64 flags;
 508
 509         /*
 510          * any extent bigger than this will be considered
 511          * already defragged.  Use 0 to take the kernel default
 512          * Use 1 to say every single extent must be rewritten
 513          */
 514         __u32 extent_thresh;
 515
 516         /*
 517          * which compression method to use if turning on compression
 518          * for this defrag operation.  If unspecified, zlib will
 519          * be used
 520          */
 521         __u32 compress_type;
 522
 523         /* spare for later */
 524         __u32 unused[4];
 525 };
 526
 527
 528 #define BTRFS_SAME_DATA_DIFFERS 1
 529 /* For extent-same ioctl */
 530 struct btrfs_ioctl_same_extent_info {
 531         __s64 fd;               /* in - destination file */
 532         __u64 logical_offset;   /* in - start of extent in destination */
 533         __u64 bytes_deduped;    /* out - total # of bytes we were able
 534                                  * to dedupe from this file */
 535         /* status of this dedupe operation:
 536          * 0 if dedup succeeds
 537          * < 0 for error
 538          * == BTRFS_SAME_DATA_DIFFERS if data differs
 539          */
 540         __s32 status;           /* out - see above description */
 541         __u32 reserved;
 542 };
 543
 544 struct btrfs_ioctl_same_args {
 545         __u64 logical_offset;   /* in - start of extent in source */
 546         __u64 length;           /* in - length of extent */
 547         __u16 dest_count;       /* in - total elements in info array */
 548         __u16 reserved1;
 549         __u32 reserved2;
 550         struct btrfs_ioctl_same_extent_info info[0];
 551 };
 552
 553 struct btrfs_ioctl_space_info {
 554         __u64 flags;
 555         __u64 total_bytes;
 556         __u64 used_bytes;
 557 };
 558
 559 struct btrfs_ioctl_space_args {
 560         __u64 space_slots;
 561         __u64 total_spaces;
 562         struct btrfs_ioctl_space_info spaces[0];
 563 };
 564
 565 struct btrfs_data_container {
 566         __u32   bytes_left;     /* out -- bytes not needed to deliver output */
 567         __u32   bytes_missing;  /* out -- additional bytes needed for result */
 568         __u32   elem_cnt;       /* out */
 569         __u32   elem_missed;    /* out */
 570         __u64   val[0];         /* out */
 571 };
 572
 573 struct btrfs_ioctl_ino_path_args {
 574         __u64                           inum;           /* in */
 575         __u64                           size;           /* in */
 576         __u64                           reserved[4];
 577         /* struct btrfs_data_container  *fspath;           out */
 578         __u64                           fspath;         /* out */
 579 };
 580
 581 struct btrfs_ioctl_logical_ino_args {
 582         __u64                           logical;        /* in */
 583         __u64                           size;           /* in */
 584         __u64                           reserved[4];
 585         /* struct btrfs_data_container  *inodes;        out   */
 586         __u64                           inodes;
 587 };
 588
 589 enum btrfs_dev_stat_values {
 590         /* disk I/O failure stats */
 591         BTRFS_DEV_STAT_WRITE_ERRS, /* EIO or EREMOTEIO from lower layers */
 592         BTRFS_DEV_STAT_READ_ERRS, /* EIO or EREMOTEIO from lower layers */
 593         BTRFS_DEV_STAT_FLUSH_ERRS, /* EIO or EREMOTEIO from lower layers */
 594
 595         /* stats for indirect indications for I/O failures */
 596         BTRFS_DEV_STAT_CORRUPTION_ERRS, /* checksum error, bytenr error or
 597                                          * contents is illegal: this is an
 598                                          * indication that the block was damaged
 599                                          * during read or write, or written to
 600                                          * wrong location or read from wrong
 601                                          * location */
 602         BTRFS_DEV_STAT_GENERATION_ERRS, /* an indication that blocks have not
 603                                          * been written */
 604
 605         BTRFS_DEV_STAT_VALUES_MAX
 606 };
 607
 608 /* Reset statistics after reading; needs SYS_ADMIN capability */
 609 #define BTRFS_DEV_STATS_RESET           (1ULL << 0)
 610
 611 struct btrfs_ioctl_get_dev_stats {
 612         __u64 devid;                            /* in */
 613         __u64 nr_items;                         /* in/out */
 614         __u64 flags;                            /* in/out */
 615
 616         /* out values: */
 617         __u64 values[BTRFS_DEV_STAT_VALUES_MAX];
 618
 619         __u64 unused[128 - 2 - BTRFS_DEV_STAT_VALUES_MAX]; /* pad to 1k */
 620 };
 621
 622 #define BTRFS_QUOTA_CTL_ENABLE  1
 623 #define BTRFS_QUOTA_CTL_DISABLE 2
 624 #define BTRFS_QUOTA_CTL_RESCAN__NOTUSED 3
 625 struct btrfs_ioctl_quota_ctl_args {
 626         __u64 cmd;
 627         __u64 status;
 628 };
 629
 630 struct btrfs_ioctl_quota_rescan_args {
 631         __u64   flags;
 632         __u64   progress;
 633         __u64   reserved[6];
 634 };
 635
 636 struct btrfs_ioctl_qgroup_assign_args {
 637         __u64 assign;
 638         __u64 src;
 639         __u64 dst;
 640 };
 641
 642 struct btrfs_ioctl_qgroup_create_args {
 643         __u64 create;
 644         __u64 qgroupid;
 645 };
 646 struct btrfs_ioctl_timespec {
 647         __u64 sec;
 648         __u32 nsec;
 649 };
 650
 651 struct btrfs_ioctl_received_subvol_args {
 652         char    uuid[BTRFS_UUID_SIZE];  /* in */
 653         __u64   stransid;               /* in */
 654         __u64   rtransid;               /* out */
 655         struct btrfs_ioctl_timespec stime; /* in */
 656         struct btrfs_ioctl_timespec rtime; /* out */
 657         __u64   flags;                  /* in */
 658         __u64   reserved[16];           /* in */
 659 };
 660
 661 /*
 662  * Caller doesn't want file data in the send stream, even if the
 663  * search of clone sources doesn't find an extent. UPDATE_EXTENT
 664  * commands will be sent instead of WRITE commands.
 665  */
 666 #define BTRFS_SEND_FLAG_NO_FILE_DATA            0x1
 667
 668 /*
 669  * Do not add the leading stream header. Used when multiple snapshots
 670  * are sent back to back.
 671  */
 672 #define BTRFS_SEND_FLAG_OMIT_STREAM_HEADER      0x2
 673
 674 /*
 675  * Omit the command at the end of the stream that indicated the end
 676  * of the stream. This option is used when multiple snapshots are
 677  * sent back to back.
 678  */
 679 #define BTRFS_SEND_FLAG_OMIT_END_CMD            0x4
 680
 681 #define BTRFS_SEND_FLAG_MASK \
 682         (BTRFS_SEND_FLAG_NO_FILE_DATA | \
 683          BTRFS_SEND_FLAG_OMIT_STREAM_HEADER | \
 684          BTRFS_SEND_FLAG_OMIT_END_CMD)
 685
 686 struct btrfs_ioctl_send_args {
 687         __s64 send_fd;                  /* in */
 688         __u64 clone_sources_count;      /* in */
 689         __u64 __user *clone_sources;    /* in */
 690         __u64 parent_root;              /* in */
 691         __u64 flags;                    /* in */
 692         __u64 reserved[4];              /* in */
 693 };
 694
 695 /* Error codes as returned by the kernel */
 696 enum btrfs_err_code {
 697         BTRFS_ERROR_DEV_RAID1_MIN_NOT_MET = 1,
 698         BTRFS_ERROR_DEV_RAID10_MIN_NOT_MET,
 699         BTRFS_ERROR_DEV_RAID5_MIN_NOT_MET,
 700         BTRFS_ERROR_DEV_RAID6_MIN_NOT_MET,
 701         BTRFS_ERROR_DEV_TGT_REPLACE,
 702         BTRFS_ERROR_DEV_MISSING_NOT_FOUND,
 703         BTRFS_ERROR_DEV_ONLY_WRITABLE,
 704         BTRFS_ERROR_DEV_EXCL_RUN_IN_PROGRESS
 705 };
 706 /* An error code to error string mapping for the kernel
 707 *  error codes
 708 */
 709 static inline char *btrfs_err_str(enum btrfs_err_code err_code)
 710 {
 711         switch (err_code) {
 712                 case BTRFS_ERROR_DEV_RAID1_MIN_NOT_MET:
 713                         return "unable to go below two devices on raid1";
 714                 case BTRFS_ERROR_DEV_RAID10_MIN_NOT_MET:
 715                         return "unable to go below four devices on raid10";
 716                 case BTRFS_ERROR_DEV_RAID5_MIN_NOT_MET:
 717                         return "unable to go below two devices on raid5";
 718                 case BTRFS_ERROR_DEV_RAID6_MIN_NOT_MET:
 719                         return "unable to go below three devices on raid6";
 720                 case BTRFS_ERROR_DEV_TGT_REPLACE:
 721                         return "unable to remove the dev_replace target dev";
 722                 case BTRFS_ERROR_DEV_MISSING_NOT_FOUND:
 723                         return "no missing devices found to remove";
 724                 case BTRFS_ERROR_DEV_ONLY_WRITABLE:
 725                         return "unable to remove the only writeable device";
 726                 case BTRFS_ERROR_DEV_EXCL_RUN_IN_PROGRESS:
 727                         return "add/delete/balance/replace/resize operation "\
 728                                 "in progress";
 729                 default:
 730                         return NULL;
 731         }
 732 }
 733
 734 #define BTRFS_IOC_SNAP_CREATE _IOW(BTRFS_IOCTL_MAGIC, 1, \
 735                                    struct btrfs_ioctl_vol_args)
 736 #define BTRFS_IOC_DEFRAG _IOW(BTRFS_IOCTL_MAGIC, 2, \
 737                                    struct btrfs_ioctl_vol_args)
 738 #define BTRFS_IOC_RESIZE _IOW(BTRFS_IOCTL_MAGIC, 3, \
 739                                    struct btrfs_ioctl_vol_args)
 740 #define BTRFS_IOC_SCAN_DEV _IOW(BTRFS_IOCTL_MAGIC, 4, \
 741                                    struct btrfs_ioctl_vol_args)
 742 /* trans start and trans end are dangerous, and only for
 743  * use by applications that know how to avoid the
 744  * resulting deadlocks
 745  */
 746 #define BTRFS_IOC_TRANS_START  _IO(BTRFS_IOCTL_MAGIC, 6)
 747 #define BTRFS_IOC_TRANS_END    _IO(BTRFS_IOCTL_MAGIC, 7)
 748 #define BTRFS_IOC_SYNC         _IO(BTRFS_IOCTL_MAGIC, 8)
 749
 750 #define BTRFS_IOC_CLONE        _IOW(BTRFS_IOCTL_MAGIC, 9, int)
 751 #define BTRFS_IOC_ADD_DEV _IOW(BTRFS_IOCTL_MAGIC, 10, \
 752                                    struct btrfs_ioctl_vol_args)
 753 #define BTRFS_IOC_RM_DEV _IOW(BTRFS_IOCTL_MAGIC, 11, \
 754                                    struct btrfs_ioctl_vol_args)
 755 #define BTRFS_IOC_BALANCE _IOW(BTRFS_IOCTL_MAGIC, 12, \
 756                                    struct btrfs_ioctl_vol_args)
 757
 758 #define BTRFS_IOC_CLONE_RANGE _IOW(BTRFS_IOCTL_MAGIC, 13, \
 759                                   struct btrfs_ioctl_clone_range_args)
 760
 761 #define BTRFS_IOC_SUBVOL_CREATE _IOW(BTRFS_IOCTL_MAGIC, 14, \
 762                                    struct btrfs_ioctl_vol_args)
 763 #define BTRFS_IOC_SNAP_DESTROY _IOW(BTRFS_IOCTL_MAGIC, 15, \
 764                                 struct btrfs_ioctl_vol_args)
 765 #define BTRFS_IOC_DEFRAG_RANGE _IOW(BTRFS_IOCTL_MAGIC, 16, \
 766                                 struct btrfs_ioctl_defrag_range_args)
 767 #define BTRFS_IOC_TREE_SEARCH _IOWR(BTRFS_IOCTL_MAGIC, 17, \
 768                                    struct btrfs_ioctl_search_args)
 769 #define BTRFS_IOC_TREE_SEARCH_V2 _IOWR(BTRFS_IOCTL_MAGIC, 17, \
 770                                            struct btrfs_ioctl_search_args_v2)
 771 #define BTRFS_IOC_INO_LOOKUP _IOWR(BTRFS_IOCTL_MAGIC, 18, \
 772                                    struct btrfs_ioctl_ino_lookup_args)
 773 #define BTRFS_IOC_DEFAULT_SUBVOL _IOW(BTRFS_IOCTL_MAGIC, 19, __u64)
 774 #define BTRFS_IOC_SPACE_INFO _IOWR(BTRFS_IOCTL_MAGIC, 20, \
 775                                     struct btrfs_ioctl_space_args)
 776 #define BTRFS_IOC_START_SYNC _IOR(BTRFS_IOCTL_MAGIC, 24, __u64)
 777 #define BTRFS_IOC_WAIT_SYNC  _IOW(BTRFS_IOCTL_MAGIC, 22, __u64)
 778 #define BTRFS_IOC_SNAP_CREATE_V2 _IOW(BTRFS_IOCTL_MAGIC, 23, \
 779                                    struct btrfs_ioctl_vol_args_v2)
 780 #define BTRFS_IOC_SUBVOL_CREATE_V2 _IOW(BTRFS_IOCTL_MAGIC, 24, \
 781                                    struct btrfs_ioctl_vol_args_v2)
 782 #define BTRFS_IOC_SUBVOL_GETFLAGS _IOR(BTRFS_IOCTL_MAGIC, 25, __u64)
 783 #define BTRFS_IOC_SUBVOL_SETFLAGS _IOW(BTRFS_IOCTL_MAGIC, 26, __u64)
 784 #define BTRFS_IOC_SCRUB _IOWR(BTRFS_IOCTL_MAGIC, 27, \
 785                               struct btrfs_ioctl_scrub_args)
 786 #define BTRFS_IOC_SCRUB_CANCEL _IO(BTRFS_IOCTL_MAGIC, 28)
 787 #define BTRFS_IOC_SCRUB_PROGRESS _IOWR(BTRFS_IOCTL_MAGIC, 29, \
 788                                        struct btrfs_ioctl_scrub_args)
 789 #define BTRFS_IOC_DEV_INFO _IOWR(BTRFS_IOCTL_MAGIC, 30, \
 790                                  struct btrfs_ioctl_dev_info_args)
 791 #define BTRFS_IOC_FS_INFO _IOR(BTRFS_IOCTL_MAGIC, 31, \
 792                                struct btrfs_ioctl_fs_info_args)
 793 #define BTRFS_IOC_BALANCE_V2 _IOWR(BTRFS_IOCTL_MAGIC, 32, \
 794                                    struct btrfs_ioctl_balance_args)
 795 #define BTRFS_IOC_BALANCE_CTL _IOW(BTRFS_IOCTL_MAGIC, 33, int)
 796 #define BTRFS_IOC_BALANCE_PROGRESS _IOR(BTRFS_IOCTL_MAGIC, 34, \
 797                                         struct btrfs_ioctl_balance_args)
 798 #define BTRFS_IOC_INO_PATHS _IOWR(BTRFS_IOCTL_MAGIC, 35, \
 799                                         struct btrfs_ioctl_ino_path_args)
 800 #define BTRFS_IOC_LOGICAL_INO _IOWR(BTRFS_IOCTL_MAGIC, 36, \
 801                                         struct btrfs_ioctl_logical_ino_args)
 802 #define BTRFS_IOC_SET_RECEIVED_SUBVOL _IOWR(BTRFS_IOCTL_MAGIC, 37, \
 803                                 struct btrfs_ioctl_received_subvol_args)
 804 #define BTRFS_IOC_SEND _IOW(BTRFS_IOCTL_MAGIC, 38, struct btrfs_ioctl_send_args)
 805 #define BTRFS_IOC_DEVICES_READY _IOR(BTRFS_IOCTL_MAGIC, 39, \
 806                                      struct btrfs_ioctl_vol_args)
 807 #define BTRFS_IOC_QUOTA_CTL _IOWR(BTRFS_IOCTL_MAGIC, 40, \
 808                                struct btrfs_ioctl_quota_ctl_args)
 809 #define BTRFS_IOC_QGROUP_ASSIGN _IOW(BTRFS_IOCTL_MAGIC, 41, \
 810                                struct btrfs_ioctl_qgroup_assign_args)
 811 #define BTRFS_IOC_QGROUP_CREATE _IOW(BTRFS_IOCTL_MAGIC, 42, \
 812                                struct btrfs_ioctl_qgroup_create_args)
 813 #define BTRFS_IOC_QGROUP_LIMIT _IOR(BTRFS_IOCTL_MAGIC, 43, \
 814                                struct btrfs_ioctl_qgroup_limit_args)
 815 #define BTRFS_IOC_QUOTA_RESCAN _IOW(BTRFS_IOCTL_MAGIC, 44, \
 816                                struct btrfs_ioctl_quota_rescan_args)
 817 #define BTRFS_IOC_QUOTA_RESCAN_STATUS _IOR(BTRFS_IOCTL_MAGIC, 45, \
 818                                struct btrfs_ioctl_quota_rescan_args)
 819 #define BTRFS_IOC_QUOTA_RESCAN_WAIT _IO(BTRFS_IOCTL_MAGIC, 46)
 820 #define BTRFS_IOC_GET_FSLABEL _IOR(BTRFS_IOCTL_MAGIC, 49, \
 821                                    char[BTRFS_LABEL_SIZE])
 822 #define BTRFS_IOC_SET_FSLABEL _IOW(BTRFS_IOCTL_MAGIC, 50, \
 823                                    char[BTRFS_LABEL_SIZE])
 824 #define BTRFS_IOC_GET_DEV_STATS _IOWR(BTRFS_IOCTL_MAGIC, 52, \
 825                                       struct btrfs_ioctl_get_dev_stats)
 826 #define BTRFS_IOC_DEV_REPLACE _IOWR(BTRFS_IOCTL_MAGIC, 53, \
 827                                     struct btrfs_ioctl_dev_replace_args)
 828 #define BTRFS_IOC_FILE_EXTENT_SAME _IOWR(BTRFS_IOCTL_MAGIC, 54, \
 829                                          struct btrfs_ioctl_same_args)
 830 #define BTRFS_IOC_GET_FEATURES _IOR(BTRFS_IOCTL_MAGIC, 57, \
 831                                    struct btrfs_ioctl_feature_flags)
 832 #define BTRFS_IOC_SET_FEATURES _IOW(BTRFS_IOCTL_MAGIC, 57, \
 833                                    struct btrfs_ioctl_feature_flags[2])
 834 #define BTRFS_IOC_GET_SUPPORTED_FEATURES _IOR(BTRFS_IOCTL_MAGIC, 57, \
 835                                    struct btrfs_ioctl_feature_flags[3])
 836 #define BTRFS_IOC_RM_DEV_V2 _IOW(BTRFS_IOCTL_MAGIC, 58, \
 837                                    struct btrfs_ioctl_vol_args_v2)
 838
 839 #endif /* _UAPI_LINUX_BTRFS_H */