root/include/uapi/linux/btrfs.h

INCLUDED FROM

   1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
   2 /*
   3  * Copyright (C) 2007 Oracle.  All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public
   7  * License v2 as published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public
  15  * License along with this program; if not, write to the
  16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  * Boston, MA 021110-1307, USA.
  18  */
  19 
  20 #ifndef _UAPI_LINUX_BTRFS_H
  21 #define _UAPI_LINUX_BTRFS_H
  22 #include <linux/types.h>
  23 #include <linux/ioctl.h>
  24 
  25 #define BTRFS_IOCTL_MAGIC 0x94
  26 #define BTRFS_VOL_NAME_MAX 255
  27 #define BTRFS_LABEL_SIZE 256
  28 
  29 /* this should be 4k */
  30 #define BTRFS_PATH_NAME_MAX 4087
  31 struct btrfs_ioctl_vol_args {
  32         __s64 fd;
  33         char name[BTRFS_PATH_NAME_MAX + 1];
  34 };
  35 
  36 #define BTRFS_DEVICE_PATH_NAME_MAX      1024
  37 #define BTRFS_SUBVOL_NAME_MAX           4039
  38 
  39 #define BTRFS_SUBVOL_CREATE_ASYNC       (1ULL << 0)
  40 #define BTRFS_SUBVOL_RDONLY             (1ULL << 1)
  41 #define BTRFS_SUBVOL_QGROUP_INHERIT     (1ULL << 2)
  42 
  43 #define BTRFS_DEVICE_SPEC_BY_ID         (1ULL << 3)
  44 
  45 #define BTRFS_VOL_ARG_V2_FLAGS_SUPPORTED                \
  46                         (BTRFS_SUBVOL_CREATE_ASYNC |    \
  47                         BTRFS_SUBVOL_RDONLY |           \
  48                         BTRFS_SUBVOL_QGROUP_INHERIT |   \
  49                         BTRFS_DEVICE_SPEC_BY_ID)
  50 
  51 #define BTRFS_FSID_SIZE 16
  52 #define BTRFS_UUID_SIZE 16
  53 #define BTRFS_UUID_UNPARSED_SIZE        37
  54 
  55 /*
  56  * flags definition for qgroup limits
  57  *
  58  * Used by:
  59  * struct btrfs_qgroup_limit.flags
  60  * struct btrfs_qgroup_limit_item.flags
  61  */
  62 #define BTRFS_QGROUP_LIMIT_MAX_RFER     (1ULL << 0)
  63 #define BTRFS_QGROUP_LIMIT_MAX_EXCL     (1ULL << 1)
  64 #define BTRFS_QGROUP_LIMIT_RSV_RFER     (1ULL << 2)
  65 #define BTRFS_QGROUP_LIMIT_RSV_EXCL     (1ULL << 3)
  66 #define BTRFS_QGROUP_LIMIT_RFER_CMPR    (1ULL << 4)
  67 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR    (1ULL << 5)
  68 
  69 struct btrfs_qgroup_limit {
  70         __u64   flags;
  71         __u64   max_rfer;
  72         __u64   max_excl;
  73         __u64   rsv_rfer;
  74         __u64   rsv_excl;
  75 };
  76 
  77 /*
  78  * flags definition for qgroup inheritance
  79  *
  80  * Used by:
  81  * struct btrfs_qgroup_inherit.flags
  82  */
  83 #define BTRFS_QGROUP_INHERIT_SET_LIMITS (1ULL << 0)
  84 
  85 struct btrfs_qgroup_inherit {
  86         __u64   flags;
  87         __u64   num_qgroups;
  88         __u64   num_ref_copies;
  89         __u64   num_excl_copies;
  90         struct btrfs_qgroup_limit lim;
  91         __u64   qgroups[0];
  92 };
  93 
  94 struct btrfs_ioctl_qgroup_limit_args {
  95         __u64   qgroupid;
  96         struct btrfs_qgroup_limit lim;
  97 };
  98 
  99 /*
 100  * flags for subvolumes
 101  *
 102  * Used by:
 103  * struct btrfs_ioctl_vol_args_v2.flags
 104  *
 105  * BTRFS_SUBVOL_RDONLY is also provided/consumed by the following ioctls:
 106  * - BTRFS_IOC_SUBVOL_GETFLAGS
 107  * - BTRFS_IOC_SUBVOL_SETFLAGS
 108  */
 109 
 110 struct btrfs_ioctl_vol_args_v2 {
 111         __s64 fd;
 112         __u64 transid;
 113         __u64 flags;
 114         union {
 115                 struct {
 116                         __u64 size;
 117                         struct btrfs_qgroup_inherit __user *qgroup_inherit;
 118                 };
 119                 __u64 unused[4];
 120         };
 121         union {
 122                 char name[BTRFS_SUBVOL_NAME_MAX + 1];
 123                 __u64 devid;
 124         };
 125 };
 126 
 127 /*
 128  * structure to report errors and progress to userspace, either as a
 129  * result of a finished scrub, a canceled scrub or a progress inquiry
 130  */
 131 struct btrfs_scrub_progress {
 132         __u64 data_extents_scrubbed;    /* # of data extents scrubbed */
 133         __u64 tree_extents_scrubbed;    /* # of tree extents scrubbed */
 134         __u64 data_bytes_scrubbed;      /* # of data bytes scrubbed */
 135         __u64 tree_bytes_scrubbed;      /* # of tree bytes scrubbed */
 136         __u64 read_errors;              /* # of read errors encountered (EIO) */
 137         __u64 csum_errors;              /* # of failed csum checks */
 138         __u64 verify_errors;            /* # of occurences, where the metadata
 139                                          * of a tree block did not match the
 140                                          * expected values, like generation or
 141                                          * logical */
 142         __u64 no_csum;                  /* # of 4k data block for which no csum
 143                                          * is present, probably the result of
 144                                          * data written with nodatasum */
 145         __u64 csum_discards;            /* # of csum for which no data was found
 146                                          * in the extent tree. */
 147         __u64 super_errors;             /* # of bad super blocks encountered */
 148         __u64 malloc_errors;            /* # of internal kmalloc errors. These
 149                                          * will likely cause an incomplete
 150                                          * scrub */
 151         __u64 uncorrectable_errors;     /* # of errors where either no intact
 152                                          * copy was found or the writeback
 153                                          * failed */
 154         __u64 corrected_errors;         /* # of errors corrected */
 155         __u64 last_physical;            /* last physical address scrubbed. In
 156                                          * case a scrub was aborted, this can
 157                                          * be used to restart the scrub */
 158         __u64 unverified_errors;        /* # of occurences where a read for a
 159                                          * full (64k) bio failed, but the re-
 160                                          * check succeeded for each 4k piece.
 161                                          * Intermittent error. */
 162 };
 163 
 164 #define BTRFS_SCRUB_READONLY    1
 165 struct btrfs_ioctl_scrub_args {
 166         __u64 devid;                            /* in */
 167         __u64 start;                            /* in */
 168         __u64 end;                              /* in */
 169         __u64 flags;                            /* in */
 170         struct btrfs_scrub_progress progress;   /* out */
 171         /* pad to 1k */
 172         __u64 unused[(1024-32-sizeof(struct btrfs_scrub_progress))/8];
 173 };
 174 
 175 #define BTRFS_IOCTL_DEV_REPLACE_CONT_READING_FROM_SRCDEV_MODE_ALWAYS    0
 176 #define BTRFS_IOCTL_DEV_REPLACE_CONT_READING_FROM_SRCDEV_MODE_AVOID     1
 177 struct btrfs_ioctl_dev_replace_start_params {
 178         __u64 srcdevid; /* in, if 0, use srcdev_name instead */
 179         __u64 cont_reading_from_srcdev_mode;    /* in, see #define
 180                                                  * above */
 181         __u8 srcdev_name[BTRFS_DEVICE_PATH_NAME_MAX + 1];       /* in */
 182         __u8 tgtdev_name[BTRFS_DEVICE_PATH_NAME_MAX + 1];       /* in */
 183 };
 184 
 185 #define BTRFS_IOCTL_DEV_REPLACE_STATE_NEVER_STARTED     0
 186 #define BTRFS_IOCTL_DEV_REPLACE_STATE_STARTED           1
 187 #define BTRFS_IOCTL_DEV_REPLACE_STATE_FINISHED          2
 188 #define BTRFS_IOCTL_DEV_REPLACE_STATE_CANCELED          3
 189 #define BTRFS_IOCTL_DEV_REPLACE_STATE_SUSPENDED         4
 190 struct btrfs_ioctl_dev_replace_status_params {
 191         __u64 replace_state;    /* out, see #define above */
 192         __u64 progress_1000;    /* out, 0 <= x <= 1000 */
 193         __u64 time_started;     /* out, seconds since 1-Jan-1970 */
 194         __u64 time_stopped;     /* out, seconds since 1-Jan-1970 */
 195         __u64 num_write_errors; /* out */
 196         __u64 num_uncorrectable_read_errors;    /* out */
 197 };
 198 
 199 #define BTRFS_IOCTL_DEV_REPLACE_CMD_START                       0
 200 #define BTRFS_IOCTL_DEV_REPLACE_CMD_STATUS                      1
 201 #define BTRFS_IOCTL_DEV_REPLACE_CMD_CANCEL                      2
 202 #define BTRFS_IOCTL_DEV_REPLACE_RESULT_NO_ERROR                 0
 203 #define BTRFS_IOCTL_DEV_REPLACE_RESULT_NOT_STARTED              1
 204 #define BTRFS_IOCTL_DEV_REPLACE_RESULT_ALREADY_STARTED          2
 205 #define BTRFS_IOCTL_DEV_REPLACE_RESULT_SCRUB_INPROGRESS         3
 206 struct btrfs_ioctl_dev_replace_args {
 207         __u64 cmd;      /* in */
 208         __u64 result;   /* out */
 209 
 210         union {
 211                 struct btrfs_ioctl_dev_replace_start_params start;
 212                 struct btrfs_ioctl_dev_replace_status_params status;
 213         };      /* in/out */
 214 
 215         __u64 spare[64];
 216 };
 217 
 218 struct btrfs_ioctl_dev_info_args {
 219         __u64 devid;                            /* in/out */
 220         __u8 uuid[BTRFS_UUID_SIZE];             /* in/out */
 221         __u64 bytes_used;                       /* out */
 222         __u64 total_bytes;                      /* out */
 223         __u64 unused[379];                      /* pad to 4k */
 224         __u8 path[BTRFS_DEVICE_PATH_NAME_MAX];  /* out */
 225 };
 226 
 227 struct btrfs_ioctl_fs_info_args {
 228         __u64 max_id;                           /* out */
 229         __u64 num_devices;                      /* out */
 230         __u8 fsid[BTRFS_FSID_SIZE];             /* out */
 231         __u32 nodesize;                         /* out */
 232         __u32 sectorsize;                       /* out */
 233         __u32 clone_alignment;                  /* out */
 234         __u32 reserved32;
 235         __u64 reserved[122];                    /* pad to 1k */
 236 };
 237 
 238 /*
 239  * feature flags
 240  *
 241  * Used by:
 242  * struct btrfs_ioctl_feature_flags
 243  */
 244 #define BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE         (1ULL << 0)
 245 /*
 246  * Older kernels (< 4.9) on big-endian systems produced broken free space tree
 247  * bitmaps, and btrfs-progs also used to corrupt the free space tree (versions
 248  * < 4.7.3).  If this bit is clear, then the free space tree cannot be trusted.
 249  * btrfs-progs can also intentionally clear this bit to ask the kernel to
 250  * rebuild the free space tree, however this might not work on older kernels
 251  * that do not know about this bit. If not sure, clear the cache manually on
 252  * first mount when booting older kernel versions.
 253  */
 254 #define BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID   (1ULL << 1)
 255 
 256 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF    (1ULL << 0)
 257 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL   (1ULL << 1)
 258 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS     (1ULL << 2)
 259 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO     (1ULL << 3)
 260 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD    (1ULL << 4)
 261 
 262 /*
 263  * older kernels tried to do bigger metadata blocks, but the
 264  * code was pretty buggy.  Lets not let them try anymore.
 265  */
 266 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA     (1ULL << 5)
 267 
 268 #define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF    (1ULL << 6)
 269 #define BTRFS_FEATURE_INCOMPAT_RAID56           (1ULL << 7)
 270 #define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA  (1ULL << 8)
 271 #define BTRFS_FEATURE_INCOMPAT_NO_HOLES         (1ULL << 9)
 272 #define BTRFS_FEATURE_INCOMPAT_METADATA_UUID    (1ULL << 10)
 273 
 274 struct btrfs_ioctl_feature_flags {
 275         __u64 compat_flags;
 276         __u64 compat_ro_flags;
 277         __u64 incompat_flags;
 278 };
 279 
 280 /* balance control ioctl modes */
 281 #define BTRFS_BALANCE_CTL_PAUSE         1
 282 #define BTRFS_BALANCE_CTL_CANCEL        2
 283 
 284 /*
 285  * this is packed, because it should be exactly the same as its disk
 286  * byte order counterpart (struct btrfs_disk_balance_args)
 287  */
 288 struct btrfs_balance_args {
 289         __u64 profiles;
 290         union {
 291                 __u64 usage;
 292                 struct {
 293                         __u32 usage_min;
 294                         __u32 usage_max;
 295                 };
 296         };
 297         __u64 devid;
 298         __u64 pstart;
 299         __u64 pend;
 300         __u64 vstart;
 301         __u64 vend;
 302 
 303         __u64 target;
 304 
 305         __u64 flags;
 306 
 307         /*
 308          * BTRFS_BALANCE_ARGS_LIMIT with value 'limit'
 309          * BTRFS_BALANCE_ARGS_LIMIT_RANGE - the extend version can use minimum
 310          * and maximum
 311          */
 312         union {
 313                 __u64 limit;            /* limit number of processed chunks */
 314                 struct {
 315                         __u32 limit_min;
 316                         __u32 limit_max;
 317                 };
 318         };
 319 
 320         /*
 321          * Process chunks that cross stripes_min..stripes_max devices,
 322          * BTRFS_BALANCE_ARGS_STRIPES_RANGE
 323          */
 324         __u32 stripes_min;
 325         __u32 stripes_max;
 326 
 327         __u64 unused[6];
 328 } __attribute__ ((__packed__));
 329 
 330 /* report balance progress to userspace */
 331 struct btrfs_balance_progress {
 332         __u64 expected;         /* estimated # of chunks that will be
 333                                  * relocated to fulfill the request */
 334         __u64 considered;       /* # of chunks we have considered so far */
 335         __u64 completed;        /* # of chunks relocated so far */
 336 };
 337 
 338 /*
 339  * flags definition for balance
 340  *
 341  * Restriper's general type filter
 342  *
 343  * Used by:
 344  * btrfs_ioctl_balance_args.flags
 345  * btrfs_balance_control.flags (internal)
 346  */
 347 #define BTRFS_BALANCE_DATA              (1ULL << 0)
 348 #define BTRFS_BALANCE_SYSTEM            (1ULL << 1)
 349 #define BTRFS_BALANCE_METADATA          (1ULL << 2)
 350 
 351 #define BTRFS_BALANCE_TYPE_MASK         (BTRFS_BALANCE_DATA |       \
 352                                          BTRFS_BALANCE_SYSTEM |     \
 353                                          BTRFS_BALANCE_METADATA)
 354 
 355 #define BTRFS_BALANCE_FORCE             (1ULL << 3)
 356 #define BTRFS_BALANCE_RESUME            (1ULL << 4)
 357 
 358 /*
 359  * flags definitions for per-type balance args
 360  *
 361  * Balance filters
 362  *
 363  * Used by:
 364  * struct btrfs_balance_args
 365  */
 366 #define BTRFS_BALANCE_ARGS_PROFILES     (1ULL << 0)
 367 #define BTRFS_BALANCE_ARGS_USAGE        (1ULL << 1)
 368 #define BTRFS_BALANCE_ARGS_DEVID        (1ULL << 2)
 369 #define BTRFS_BALANCE_ARGS_DRANGE       (1ULL << 3)
 370 #define BTRFS_BALANCE_ARGS_VRANGE       (1ULL << 4)
 371 #define BTRFS_BALANCE_ARGS_LIMIT        (1ULL << 5)
 372 #define BTRFS_BALANCE_ARGS_LIMIT_RANGE  (1ULL << 6)
 373 #define BTRFS_BALANCE_ARGS_STRIPES_RANGE (1ULL << 7)
 374 #define BTRFS_BALANCE_ARGS_USAGE_RANGE  (1ULL << 10)
 375 
 376 #define BTRFS_BALANCE_ARGS_MASK                 \
 377         (BTRFS_BALANCE_ARGS_PROFILES |          \
 378          BTRFS_BALANCE_ARGS_USAGE |             \
 379          BTRFS_BALANCE_ARGS_DEVID |             \
 380          BTRFS_BALANCE_ARGS_DRANGE |            \
 381          BTRFS_BALANCE_ARGS_VRANGE |            \
 382          BTRFS_BALANCE_ARGS_LIMIT |             \
 383          BTRFS_BALANCE_ARGS_LIMIT_RANGE |       \
 384          BTRFS_BALANCE_ARGS_STRIPES_RANGE |     \
 385          BTRFS_BALANCE_ARGS_USAGE_RANGE)
 386 
 387 /*
 388  * Profile changing flags.  When SOFT is set we won't relocate chunk if
 389  * it already has the target profile (even though it may be
 390  * half-filled).
 391  */
 392 #define BTRFS_BALANCE_ARGS_CONVERT      (1ULL << 8)
 393 #define BTRFS_BALANCE_ARGS_SOFT         (1ULL << 9)
 394 
 395 
 396 /*
 397  * flags definition for balance state
 398  *
 399  * Used by:
 400  * struct btrfs_ioctl_balance_args.state
 401  */
 402 #define BTRFS_BALANCE_STATE_RUNNING     (1ULL << 0)
 403 #define BTRFS_BALANCE_STATE_PAUSE_REQ   (1ULL << 1)
 404 #define BTRFS_BALANCE_STATE_CANCEL_REQ  (1ULL << 2)
 405 
 406 struct btrfs_ioctl_balance_args {
 407         __u64 flags;                            /* in/out */
 408         __u64 state;                            /* out */
 409 
 410         struct btrfs_balance_args data;         /* in/out */
 411         struct btrfs_balance_args meta;         /* in/out */
 412         struct btrfs_balance_args sys;          /* in/out */
 413 
 414         struct btrfs_balance_progress stat;     /* out */
 415 
 416         __u64 unused[72];                       /* pad to 1k */
 417 };
 418 
 419 #define BTRFS_INO_LOOKUP_PATH_MAX 4080
 420 struct btrfs_ioctl_ino_lookup_args {
 421         __u64 treeid;
 422         __u64 objectid;
 423         char name[BTRFS_INO_LOOKUP_PATH_MAX];
 424 };
 425 
 426 #define BTRFS_INO_LOOKUP_USER_PATH_MAX (4080 - BTRFS_VOL_NAME_MAX - 1)
 427 struct btrfs_ioctl_ino_lookup_user_args {
 428         /* in, inode number containing the subvolume of 'subvolid' */
 429         __u64 dirid;
 430         /* in */
 431         __u64 treeid;
 432         /* out, name of the subvolume of 'treeid' */
 433         char name[BTRFS_VOL_NAME_MAX + 1];
 434         /*
 435          * out, constructed path from the directory with which the ioctl is
 436          * called to dirid
 437          */
 438         char path[BTRFS_INO_LOOKUP_USER_PATH_MAX];
 439 };
 440 
 441 /* Search criteria for the btrfs SEARCH ioctl family. */
 442 struct btrfs_ioctl_search_key {
 443         /*
 444          * The tree we're searching in. 1 is the tree of tree roots, 2 is the
 445          * extent tree, etc...
 446          *
 447          * A special tree_id value of 0 will cause a search in the subvolume
 448          * tree that the inode which is passed to the ioctl is part of.
 449          */
 450         __u64 tree_id;          /* in */
 451 
 452         /*
 453          * When doing a tree search, we're actually taking a slice from a
 454          * linear search space of 136-bit keys.
 455          *
 456          * A full 136-bit tree key is composed as:
 457          *   (objectid << 72) + (type << 64) + offset
 458          *
 459          * The individual min and max values for objectid, type and offset
 460          * define the min_key and max_key values for the search range. All
 461          * metadata items with a key in the interval [min_key, max_key] will be
 462          * returned.
 463          *
 464          * Additionally, we can filter the items returned on transaction id of
 465          * the metadata block they're stored in by specifying a transid range.
 466          * Be aware that this transaction id only denotes when the metadata
 467          * page that currently contains the item got written the last time as
 468          * result of a COW operation.  The number does not have any meaning
 469          * related to the transaction in which an individual item that is being
 470          * returned was created or changed.
 471          */
 472         __u64 min_objectid;     /* in */
 473         __u64 max_objectid;     /* in */
 474         __u64 min_offset;       /* in */
 475         __u64 max_offset;       /* in */
 476         __u64 min_transid;      /* in */
 477         __u64 max_transid;      /* in */
 478         __u32 min_type;         /* in */
 479         __u32 max_type;         /* in */
 480 
 481         /*
 482          * input: The maximum amount of results desired.
 483          * output: The actual amount of items returned, restricted by any of:
 484          *  - reaching the upper bound of the search range
 485          *  - reaching the input nr_items amount of items
 486          *  - completely filling the supplied memory buffer
 487          */
 488         __u32 nr_items;         /* in/out */
 489 
 490         /* align to 64 bits */
 491         __u32 unused;
 492 
 493         /* some extra for later */
 494         __u64 unused1;
 495         __u64 unused2;
 496         __u64 unused3;
 497         __u64 unused4;
 498 };
 499 
 500 struct btrfs_ioctl_search_header {
 501         __u64 transid;
 502         __u64 objectid;
 503         __u64 offset;
 504         __u32 type;
 505         __u32 len;
 506 };
 507 
 508 #define BTRFS_SEARCH_ARGS_BUFSIZE (4096 - sizeof(struct btrfs_ioctl_search_key))
 509 /*
 510  * the buf is an array of search headers where
 511  * each header is followed by the actual item
 512  * the type field is expanded to 32 bits for alignment
 513  */
 514 struct btrfs_ioctl_search_args {
 515         struct btrfs_ioctl_search_key key;
 516         char buf[BTRFS_SEARCH_ARGS_BUFSIZE];
 517 };
 518 
 519 struct btrfs_ioctl_search_args_v2 {
 520         struct btrfs_ioctl_search_key key; /* in/out - search parameters */
 521         __u64 buf_size;            /* in - size of buffer
 522                                             * out - on EOVERFLOW: needed size
 523                                             *       to store item */
 524         __u64 buf[0];                       /* out - found items */
 525 };
 526 
 527 struct btrfs_ioctl_clone_range_args {
 528   __s64 src_fd;
 529   __u64 src_offset, src_length;
 530   __u64 dest_offset;
 531 };
 532 
 533 /*
 534  * flags definition for the defrag range ioctl
 535  *
 536  * Used by:
 537  * struct btrfs_ioctl_defrag_range_args.flags
 538  */
 539 #define BTRFS_DEFRAG_RANGE_COMPRESS 1
 540 #define BTRFS_DEFRAG_RANGE_START_IO 2
 541 struct btrfs_ioctl_defrag_range_args {
 542         /* start of the defrag operation */
 543         __u64 start;
 544 
 545         /* number of bytes to defrag, use (u64)-1 to say all */
 546         __u64 len;
 547 
 548         /*
 549          * flags for the operation, which can include turning
 550          * on compression for this one defrag
 551          */
 552         __u64 flags;
 553 
 554         /*
 555          * any extent bigger than this will be considered
 556          * already defragged.  Use 0 to take the kernel default
 557          * Use 1 to say every single extent must be rewritten
 558          */
 559         __u32 extent_thresh;
 560 
 561         /*
 562          * which compression method to use if turning on compression
 563          * for this defrag operation.  If unspecified, zlib will
 564          * be used
 565          */
 566         __u32 compress_type;
 567 
 568         /* spare for later */
 569         __u32 unused[4];
 570 };
 571 
 572 
 573 #define BTRFS_SAME_DATA_DIFFERS 1
 574 /* For extent-same ioctl */
 575 struct btrfs_ioctl_same_extent_info {
 576         __s64 fd;               /* in - destination file */
 577         __u64 logical_offset;   /* in - start of extent in destination */
 578         __u64 bytes_deduped;    /* out - total # of bytes we were able
 579                                  * to dedupe from this file */
 580         /* status of this dedupe operation:
 581          * 0 if dedup succeeds
 582          * < 0 for error
 583          * == BTRFS_SAME_DATA_DIFFERS if data differs
 584          */
 585         __s32 status;           /* out - see above description */
 586         __u32 reserved;
 587 };
 588 
 589 struct btrfs_ioctl_same_args {
 590         __u64 logical_offset;   /* in - start of extent in source */
 591         __u64 length;           /* in - length of extent */
 592         __u16 dest_count;       /* in - total elements in info array */
 593         __u16 reserved1;
 594         __u32 reserved2;
 595         struct btrfs_ioctl_same_extent_info info[0];
 596 };
 597 
 598 struct btrfs_ioctl_space_info {
 599         __u64 flags;
 600         __u64 total_bytes;
 601         __u64 used_bytes;
 602 };
 603 
 604 struct btrfs_ioctl_space_args {
 605         __u64 space_slots;
 606         __u64 total_spaces;
 607         struct btrfs_ioctl_space_info spaces[0];
 608 };
 609 
 610 struct btrfs_data_container {
 611         __u32   bytes_left;     /* out -- bytes not needed to deliver output */
 612         __u32   bytes_missing;  /* out -- additional bytes needed for result */
 613         __u32   elem_cnt;       /* out */
 614         __u32   elem_missed;    /* out */
 615         __u64   val[0];         /* out */
 616 };
 617 
 618 struct btrfs_ioctl_ino_path_args {
 619         __u64                           inum;           /* in */
 620         __u64                           size;           /* in */
 621         __u64                           reserved[4];
 622         /* struct btrfs_data_container  *fspath;           out */
 623         __u64                           fspath;         /* out */
 624 };
 625 
 626 struct btrfs_ioctl_logical_ino_args {
 627         __u64                           logical;        /* in */
 628         __u64                           size;           /* in */
 629         __u64                           reserved[3];    /* must be 0 for now */
 630         __u64                           flags;          /* in, v2 only */
 631         /* struct btrfs_data_container  *inodes;        out   */
 632         __u64                           inodes;
 633 };
 634 /* Return every ref to the extent, not just those containing logical block.
 635  * Requires logical == extent bytenr. */
 636 #define BTRFS_LOGICAL_INO_ARGS_IGNORE_OFFSET    (1ULL << 0)
 637 
 638 enum btrfs_dev_stat_values {
 639         /* disk I/O failure stats */
 640         BTRFS_DEV_STAT_WRITE_ERRS, /* EIO or EREMOTEIO from lower layers */
 641         BTRFS_DEV_STAT_READ_ERRS, /* EIO or EREMOTEIO from lower layers */
 642         BTRFS_DEV_STAT_FLUSH_ERRS, /* EIO or EREMOTEIO from lower layers */
 643 
 644         /* stats for indirect indications for I/O failures */
 645         BTRFS_DEV_STAT_CORRUPTION_ERRS, /* checksum error, bytenr error or
 646                                          * contents is illegal: this is an
 647                                          * indication that the block was damaged
 648                                          * during read or write, or written to
 649                                          * wrong location or read from wrong
 650                                          * location */
 651         BTRFS_DEV_STAT_GENERATION_ERRS, /* an indication that blocks have not
 652                                          * been written */
 653 
 654         BTRFS_DEV_STAT_VALUES_MAX
 655 };
 656 
 657 /* Reset statistics after reading; needs SYS_ADMIN capability */
 658 #define BTRFS_DEV_STATS_RESET           (1ULL << 0)
 659 
 660 struct btrfs_ioctl_get_dev_stats {
 661         __u64 devid;                            /* in */
 662         __u64 nr_items;                         /* in/out */
 663         __u64 flags;                            /* in/out */
 664 
 665         /* out values: */
 666         __u64 values[BTRFS_DEV_STAT_VALUES_MAX];
 667 
 668         /*
 669          * This pads the struct to 1032 bytes. It was originally meant to pad to
 670          * 1024 bytes, but when adding the flags field, the padding calculation
 671          * was not adjusted.
 672          */
 673         __u64 unused[128 - 2 - BTRFS_DEV_STAT_VALUES_MAX];
 674 };
 675 
 676 #define BTRFS_QUOTA_CTL_ENABLE  1
 677 #define BTRFS_QUOTA_CTL_DISABLE 2
 678 #define BTRFS_QUOTA_CTL_RESCAN__NOTUSED 3
 679 struct btrfs_ioctl_quota_ctl_args {
 680         __u64 cmd;
 681         __u64 status;
 682 };
 683 
 684 struct btrfs_ioctl_quota_rescan_args {
 685         __u64   flags;
 686         __u64   progress;
 687         __u64   reserved[6];
 688 };
 689 
 690 struct btrfs_ioctl_qgroup_assign_args {
 691         __u64 assign;
 692         __u64 src;
 693         __u64 dst;
 694 };
 695 
 696 struct btrfs_ioctl_qgroup_create_args {
 697         __u64 create;
 698         __u64 qgroupid;
 699 };
 700 struct btrfs_ioctl_timespec {
 701         __u64 sec;
 702         __u32 nsec;
 703 };
 704 
 705 struct btrfs_ioctl_received_subvol_args {
 706         char    uuid[BTRFS_UUID_SIZE];  /* in */
 707         __u64   stransid;               /* in */
 708         __u64   rtransid;               /* out */
 709         struct btrfs_ioctl_timespec stime; /* in */
 710         struct btrfs_ioctl_timespec rtime; /* out */
 711         __u64   flags;                  /* in */
 712         __u64   reserved[16];           /* in */
 713 };
 714 
 715 /*
 716  * Caller doesn't want file data in the send stream, even if the
 717  * search of clone sources doesn't find an extent. UPDATE_EXTENT
 718  * commands will be sent instead of WRITE commands.
 719  */
 720 #define BTRFS_SEND_FLAG_NO_FILE_DATA            0x1
 721 
 722 /*
 723  * Do not add the leading stream header. Used when multiple snapshots
 724  * are sent back to back.
 725  */
 726 #define BTRFS_SEND_FLAG_OMIT_STREAM_HEADER      0x2
 727 
 728 /*
 729  * Omit the command at the end of the stream that indicated the end
 730  * of the stream. This option is used when multiple snapshots are
 731  * sent back to back.
 732  */
 733 #define BTRFS_SEND_FLAG_OMIT_END_CMD            0x4
 734 
 735 #define BTRFS_SEND_FLAG_MASK \
 736         (BTRFS_SEND_FLAG_NO_FILE_DATA | \
 737          BTRFS_SEND_FLAG_OMIT_STREAM_HEADER | \
 738          BTRFS_SEND_FLAG_OMIT_END_CMD)
 739 
 740 struct btrfs_ioctl_send_args {
 741         __s64 send_fd;                  /* in */
 742         __u64 clone_sources_count;      /* in */
 743         __u64 __user *clone_sources;    /* in */
 744         __u64 parent_root;              /* in */
 745         __u64 flags;                    /* in */
 746         __u64 reserved[4];              /* in */
 747 };
 748 
 749 /*
 750  * Information about a fs tree root.
 751  *
 752  * All items are filled by the ioctl
 753  */
 754 struct btrfs_ioctl_get_subvol_info_args {
 755         /* Id of this subvolume */
 756         __u64 treeid;
 757 
 758         /* Name of this subvolume, used to get the real name at mount point */
 759         char name[BTRFS_VOL_NAME_MAX + 1];
 760 
 761         /*
 762          * Id of the subvolume which contains this subvolume.
 763          * Zero for top-level subvolume or a deleted subvolume.
 764          */
 765         __u64 parent_id;
 766 
 767         /*
 768          * Inode number of the directory which contains this subvolume.
 769          * Zero for top-level subvolume or a deleted subvolume
 770          */
 771         __u64 dirid;
 772 
 773         /* Latest transaction id of this subvolume */
 774         __u64 generation;
 775 
 776         /* Flags of this subvolume */
 777         __u64 flags;
 778 
 779         /* UUID of this subvolume */
 780         __u8 uuid[BTRFS_UUID_SIZE];
 781 
 782         /*
 783          * UUID of the subvolume of which this subvolume is a snapshot.
 784          * All zero for a non-snapshot subvolume.
 785          */
 786         __u8 parent_uuid[BTRFS_UUID_SIZE];
 787 
 788         /*
 789          * UUID of the subvolume from which this subvolume was received.
 790          * All zero for non-received subvolume.
 791          */
 792         __u8 received_uuid[BTRFS_UUID_SIZE];
 793 
 794         /* Transaction id indicating when change/create/send/receive happened */
 795         __u64 ctransid;
 796         __u64 otransid;
 797         __u64 stransid;
 798         __u64 rtransid;
 799         /* Time corresponding to c/o/s/rtransid */
 800         struct btrfs_ioctl_timespec ctime;
 801         struct btrfs_ioctl_timespec otime;
 802         struct btrfs_ioctl_timespec stime;
 803         struct btrfs_ioctl_timespec rtime;
 804 
 805         /* Must be zero */
 806         __u64 reserved[8];
 807 };
 808 
 809 #define BTRFS_MAX_ROOTREF_BUFFER_NUM 255
 810 struct btrfs_ioctl_get_subvol_rootref_args {
 811                 /* in/out, minimum id of rootref's treeid to be searched */
 812                 __u64 min_treeid;
 813 
 814                 /* out */
 815                 struct {
 816                         __u64 treeid;
 817                         __u64 dirid;
 818                 } rootref[BTRFS_MAX_ROOTREF_BUFFER_NUM];
 819 
 820                 /* out, number of found items */
 821                 __u8 num_items;
 822                 __u8 align[7];
 823 };
 824 
 825 /* Error codes as returned by the kernel */
 826 enum btrfs_err_code {
 827         BTRFS_ERROR_DEV_RAID1_MIN_NOT_MET = 1,
 828         BTRFS_ERROR_DEV_RAID10_MIN_NOT_MET,
 829         BTRFS_ERROR_DEV_RAID5_MIN_NOT_MET,
 830         BTRFS_ERROR_DEV_RAID6_MIN_NOT_MET,
 831         BTRFS_ERROR_DEV_TGT_REPLACE,
 832         BTRFS_ERROR_DEV_MISSING_NOT_FOUND,
 833         BTRFS_ERROR_DEV_ONLY_WRITABLE,
 834         BTRFS_ERROR_DEV_EXCL_RUN_IN_PROGRESS
 835 };
 836 
 837 #define BTRFS_IOC_SNAP_CREATE _IOW(BTRFS_IOCTL_MAGIC, 1, \
 838                                    struct btrfs_ioctl_vol_args)
 839 #define BTRFS_IOC_DEFRAG _IOW(BTRFS_IOCTL_MAGIC, 2, \
 840                                    struct btrfs_ioctl_vol_args)
 841 #define BTRFS_IOC_RESIZE _IOW(BTRFS_IOCTL_MAGIC, 3, \
 842                                    struct btrfs_ioctl_vol_args)
 843 #define BTRFS_IOC_SCAN_DEV _IOW(BTRFS_IOCTL_MAGIC, 4, \
 844                                    struct btrfs_ioctl_vol_args)
 845 #define BTRFS_IOC_FORGET_DEV _IOW(BTRFS_IOCTL_MAGIC, 5, \
 846                                    struct btrfs_ioctl_vol_args)
 847 /* trans start and trans end are dangerous, and only for
 848  * use by applications that know how to avoid the
 849  * resulting deadlocks
 850  */
 851 #define BTRFS_IOC_TRANS_START  _IO(BTRFS_IOCTL_MAGIC, 6)
 852 #define BTRFS_IOC_TRANS_END    _IO(BTRFS_IOCTL_MAGIC, 7)
 853 #define BTRFS_IOC_SYNC         _IO(BTRFS_IOCTL_MAGIC, 8)
 854 
 855 #define BTRFS_IOC_CLONE        _IOW(BTRFS_IOCTL_MAGIC, 9, int)
 856 #define BTRFS_IOC_ADD_DEV _IOW(BTRFS_IOCTL_MAGIC, 10, \
 857                                    struct btrfs_ioctl_vol_args)
 858 #define BTRFS_IOC_RM_DEV _IOW(BTRFS_IOCTL_MAGIC, 11, \
 859                                    struct btrfs_ioctl_vol_args)
 860 #define BTRFS_IOC_BALANCE _IOW(BTRFS_IOCTL_MAGIC, 12, \
 861                                    struct btrfs_ioctl_vol_args)
 862 
 863 #define BTRFS_IOC_CLONE_RANGE _IOW(BTRFS_IOCTL_MAGIC, 13, \
 864                                   struct btrfs_ioctl_clone_range_args)
 865 
 866 #define BTRFS_IOC_SUBVOL_CREATE _IOW(BTRFS_IOCTL_MAGIC, 14, \
 867                                    struct btrfs_ioctl_vol_args)
 868 #define BTRFS_IOC_SNAP_DESTROY _IOW(BTRFS_IOCTL_MAGIC, 15, \
 869                                 struct btrfs_ioctl_vol_args)
 870 #define BTRFS_IOC_DEFRAG_RANGE _IOW(BTRFS_IOCTL_MAGIC, 16, \
 871                                 struct btrfs_ioctl_defrag_range_args)
 872 #define BTRFS_IOC_TREE_SEARCH _IOWR(BTRFS_IOCTL_MAGIC, 17, \
 873                                    struct btrfs_ioctl_search_args)
 874 #define BTRFS_IOC_TREE_SEARCH_V2 _IOWR(BTRFS_IOCTL_MAGIC, 17, \
 875                                            struct btrfs_ioctl_search_args_v2)
 876 #define BTRFS_IOC_INO_LOOKUP _IOWR(BTRFS_IOCTL_MAGIC, 18, \
 877                                    struct btrfs_ioctl_ino_lookup_args)
 878 #define BTRFS_IOC_DEFAULT_SUBVOL _IOW(BTRFS_IOCTL_MAGIC, 19, __u64)
 879 #define BTRFS_IOC_SPACE_INFO _IOWR(BTRFS_IOCTL_MAGIC, 20, \
 880                                     struct btrfs_ioctl_space_args)
 881 #define BTRFS_IOC_START_SYNC _IOR(BTRFS_IOCTL_MAGIC, 24, __u64)
 882 #define BTRFS_IOC_WAIT_SYNC  _IOW(BTRFS_IOCTL_MAGIC, 22, __u64)
 883 #define BTRFS_IOC_SNAP_CREATE_V2 _IOW(BTRFS_IOCTL_MAGIC, 23, \
 884                                    struct btrfs_ioctl_vol_args_v2)
 885 #define BTRFS_IOC_SUBVOL_CREATE_V2 _IOW(BTRFS_IOCTL_MAGIC, 24, \
 886                                    struct btrfs_ioctl_vol_args_v2)
 887 #define BTRFS_IOC_SUBVOL_GETFLAGS _IOR(BTRFS_IOCTL_MAGIC, 25, __u64)
 888 #define BTRFS_IOC_SUBVOL_SETFLAGS _IOW(BTRFS_IOCTL_MAGIC, 26, __u64)
 889 #define BTRFS_IOC_SCRUB _IOWR(BTRFS_IOCTL_MAGIC, 27, \
 890                               struct btrfs_ioctl_scrub_args)
 891 #define BTRFS_IOC_SCRUB_CANCEL _IO(BTRFS_IOCTL_MAGIC, 28)
 892 #define BTRFS_IOC_SCRUB_PROGRESS _IOWR(BTRFS_IOCTL_MAGIC, 29, \
 893                                        struct btrfs_ioctl_scrub_args)
 894 #define BTRFS_IOC_DEV_INFO _IOWR(BTRFS_IOCTL_MAGIC, 30, \
 895                                  struct btrfs_ioctl_dev_info_args)
 896 #define BTRFS_IOC_FS_INFO _IOR(BTRFS_IOCTL_MAGIC, 31, \
 897                                struct btrfs_ioctl_fs_info_args)
 898 #define BTRFS_IOC_BALANCE_V2 _IOWR(BTRFS_IOCTL_MAGIC, 32, \
 899                                    struct btrfs_ioctl_balance_args)
 900 #define BTRFS_IOC_BALANCE_CTL _IOW(BTRFS_IOCTL_MAGIC, 33, int)
 901 #define BTRFS_IOC_BALANCE_PROGRESS _IOR(BTRFS_IOCTL_MAGIC, 34, \
 902                                         struct btrfs_ioctl_balance_args)
 903 #define BTRFS_IOC_INO_PATHS _IOWR(BTRFS_IOCTL_MAGIC, 35, \
 904                                         struct btrfs_ioctl_ino_path_args)
 905 #define BTRFS_IOC_LOGICAL_INO _IOWR(BTRFS_IOCTL_MAGIC, 36, \
 906                                         struct btrfs_ioctl_logical_ino_args)
 907 #define BTRFS_IOC_SET_RECEIVED_SUBVOL _IOWR(BTRFS_IOCTL_MAGIC, 37, \
 908                                 struct btrfs_ioctl_received_subvol_args)
 909 #define BTRFS_IOC_SEND _IOW(BTRFS_IOCTL_MAGIC, 38, struct btrfs_ioctl_send_args)
 910 #define BTRFS_IOC_DEVICES_READY _IOR(BTRFS_IOCTL_MAGIC, 39, \
 911                                      struct btrfs_ioctl_vol_args)
 912 #define BTRFS_IOC_QUOTA_CTL _IOWR(BTRFS_IOCTL_MAGIC, 40, \
 913                                struct btrfs_ioctl_quota_ctl_args)
 914 #define BTRFS_IOC_QGROUP_ASSIGN _IOW(BTRFS_IOCTL_MAGIC, 41, \
 915                                struct btrfs_ioctl_qgroup_assign_args)
 916 #define BTRFS_IOC_QGROUP_CREATE _IOW(BTRFS_IOCTL_MAGIC, 42, \
 917                                struct btrfs_ioctl_qgroup_create_args)
 918 #define BTRFS_IOC_QGROUP_LIMIT _IOR(BTRFS_IOCTL_MAGIC, 43, \
 919                                struct btrfs_ioctl_qgroup_limit_args)
 920 #define BTRFS_IOC_QUOTA_RESCAN _IOW(BTRFS_IOCTL_MAGIC, 44, \
 921                                struct btrfs_ioctl_quota_rescan_args)
 922 #define BTRFS_IOC_QUOTA_RESCAN_STATUS _IOR(BTRFS_IOCTL_MAGIC, 45, \
 923                                struct btrfs_ioctl_quota_rescan_args)
 924 #define BTRFS_IOC_QUOTA_RESCAN_WAIT _IO(BTRFS_IOCTL_MAGIC, 46)
 925 #define BTRFS_IOC_GET_FSLABEL   FS_IOC_GETFSLABEL
 926 #define BTRFS_IOC_SET_FSLABEL   FS_IOC_SETFSLABEL
 927 #define BTRFS_IOC_GET_DEV_STATS _IOWR(BTRFS_IOCTL_MAGIC, 52, \
 928                                       struct btrfs_ioctl_get_dev_stats)
 929 #define BTRFS_IOC_DEV_REPLACE _IOWR(BTRFS_IOCTL_MAGIC, 53, \
 930                                     struct btrfs_ioctl_dev_replace_args)
 931 #define BTRFS_IOC_FILE_EXTENT_SAME _IOWR(BTRFS_IOCTL_MAGIC, 54, \
 932                                          struct btrfs_ioctl_same_args)
 933 #define BTRFS_IOC_GET_FEATURES _IOR(BTRFS_IOCTL_MAGIC, 57, \
 934                                    struct btrfs_ioctl_feature_flags)
 935 #define BTRFS_IOC_SET_FEATURES _IOW(BTRFS_IOCTL_MAGIC, 57, \
 936                                    struct btrfs_ioctl_feature_flags[2])
 937 #define BTRFS_IOC_GET_SUPPORTED_FEATURES _IOR(BTRFS_IOCTL_MAGIC, 57, \
 938                                    struct btrfs_ioctl_feature_flags[3])
 939 #define BTRFS_IOC_RM_DEV_V2 _IOW(BTRFS_IOCTL_MAGIC, 58, \
 940                                    struct btrfs_ioctl_vol_args_v2)
 941 #define BTRFS_IOC_LOGICAL_INO_V2 _IOWR(BTRFS_IOCTL_MAGIC, 59, \
 942                                         struct btrfs_ioctl_logical_ino_args)
 943 #define BTRFS_IOC_GET_SUBVOL_INFO _IOR(BTRFS_IOCTL_MAGIC, 60, \
 944                                 struct btrfs_ioctl_get_subvol_info_args)
 945 #define BTRFS_IOC_GET_SUBVOL_ROOTREF _IOWR(BTRFS_IOCTL_MAGIC, 61, \
 946                                 struct btrfs_ioctl_get_subvol_rootref_args)
 947 #define BTRFS_IOC_INO_LOOKUP_USER _IOWR(BTRFS_IOCTL_MAGIC, 62, \
 948                                 struct btrfs_ioctl_ino_lookup_user_args)
 949 
 950 #endif /* _UAPI_LINUX_BTRFS_H */