granicus.if.org Git - strace/blob - btrfs.c

   1 /*
   2  * Copyright (c) 2016 Jeff Mahoney <jeffm@suse.com>
   3  * Copyright (c) 2016-2018 The strace developers.
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  * 3. The name of the author may not be used to endorse or promote products
  15  *    derived from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  */
  28
  29 #include "defs.h"
  30
  31 #ifdef HAVE_LINUX_BTRFS_H
  32
  33 #include DEF_MPERS_TYPE(struct_btrfs_ioctl_dev_replace_args)
  34 #include DEF_MPERS_TYPE(struct_btrfs_ioctl_send_args)
  35 #include DEF_MPERS_TYPE(struct_btrfs_ioctl_received_subvol_args)
  36 #include DEF_MPERS_TYPE(struct_btrfs_ioctl_vol_args_v2)
  37
  38 # include <linux/btrfs.h>
  39
  40 typedef struct btrfs_ioctl_dev_replace_args
  41         struct_btrfs_ioctl_dev_replace_args;
  42 typedef struct btrfs_ioctl_send_args
  43         struct_btrfs_ioctl_send_args;
  44 typedef struct btrfs_ioctl_received_subvol_args
  45         struct_btrfs_ioctl_received_subvol_args;
  46 typedef struct btrfs_ioctl_vol_args_v2
  47         struct_btrfs_ioctl_vol_args_v2;
  48
  49 #endif /* HAVE_LINUX_BTRFS_H */
  50
  51 #include MPERS_DEFS
  52
  53 #ifdef HAVE_LINUX_BTRFS_H
  54
  55 #include "print_fields.h"
  56 #include <linux/fs.h>
  57
  58 /*
  59  * Prior to Linux 3.12, the BTRFS_IOC_DEFAULT_SUBVOL used u64 in
  60  * its definition, which isn't exported by the kernel.
  61  */
  62 typedef __u64 u64;
  63
  64 #ifndef HAVE_STRUCT_BTRFS_IOCTL_FEATURE_FLAGS_COMPAT_FLAGS
  65 struct btrfs_ioctl_feature_flags {
  66         uint64_t compat_flags;
  67         uint64_t compat_ro_flags;
  68         uint64_t incompat_flags;
  69 };
  70 #endif
  71
  72 #ifndef HAVE_STRUCT_BTRFS_IOCTL_DEFRAG_RANGE_ARGS_START
  73 struct btrfs_ioctl_defrag_range_args {
  74         uint64_t start;
  75         uint64_t len;
  76         uint64_t flags;
  77         uint32_t extent_thresh;
  78         uint32_t compress_type;
  79         uint32_t unused[4];
  80 };
  81 #endif
  82
  83 #ifndef BTRFS_LABEL_SIZE
  84 # define BTRFS_LABEL_SIZE 256
  85 #endif
  86
  87 #ifndef BTRFS_IOC_QUOTA_RESCAN
  88 struct btrfs_ioctl_quota_rescan_args {
  89         uint64_t flags, progress, reserved[6];
  90 };
  91 # define BTRFS_IOC_QUOTA_RESCAN _IOW(BTRFS_IOCTL_MAGIC, 44, \
  92                                         struct btrfs_ioctl_quota_rescan_args)
  93 # define BTRFS_IOC_QUOTA_RESCAN_STATUS _IOR(BTRFS_IOCTL_MAGIC, 45, \
  94                                         struct btrfs_ioctl_quota_rescan_args)
  95 #endif
  96
  97 #ifndef BTRFS_IOC_QUOTA_RESCAN_WAIT
  98 # define BTRFS_IOC_QUOTA_RESCAN_WAIT _IO(BTRFS_IOCTL_MAGIC, 46)
  99 #endif
 100
 101 #ifndef BTRFS_IOC_GET_FEATURES
 102 # define BTRFS_IOC_GET_FEATURES _IOR(BTRFS_IOCTL_MAGIC, 57, \
 103                                         struct btrfs_ioctl_feature_flags)
 104 # define BTRFS_IOC_SET_FEATURES _IOW(BTRFS_IOCTL_MAGIC, 57, \
 105                                         struct btrfs_ioctl_feature_flags[2])
 106 # define BTRFS_IOC_GET_SUPPORTED_FEATURES _IOR(BTRFS_IOCTL_MAGIC, 57, \
 107                                         struct btrfs_ioctl_feature_flags[3])
 108 #endif
 109
 110 #ifndef BTRFS_IOC_TREE_SEARCH_V2
 111 # define BTRFS_IOC_TREE_SEARCH_V2 _IOWR(BTRFS_IOCTL_MAGIC, 17, \
 112                                         struct btrfs_ioctl_search_args_v2)
 113 struct btrfs_ioctl_search_args_v2 {
 114         struct btrfs_ioctl_search_key key; /* in/out - search parameters */
 115         uint64_t buf_size;                 /* in - size of buffer
 116                                             * out - on EOVERFLOW: needed size
 117                                             *       to store item */
 118         uint64_t buf[0];                   /* out - found items */
 119 };
 120 #endif
 121
 122 #include "xlat/btrfs_balance_args.h"
 123 #include "xlat/btrfs_balance_ctl_cmds.h"
 124 #include "xlat/btrfs_balance_flags.h"
 125 #include "xlat/btrfs_balance_state.h"
 126 #include "xlat/btrfs_compress_types.h"
 127 #include "xlat/btrfs_cont_reading_from_srcdev_mode.h"
 128 #include "xlat/btrfs_defrag_flags.h"
 129 #include "xlat/btrfs_dev_replace_cmds.h"
 130 #include "xlat/btrfs_dev_replace_results.h"
 131 #include "xlat/btrfs_dev_replace_state.h"
 132 #include "xlat/btrfs_dev_stats_flags.h"
 133 #include "xlat/btrfs_dev_stats_values.h"
 134 #include "xlat/btrfs_features_compat.h"
 135 #include "xlat/btrfs_features_compat_ro.h"
 136 #include "xlat/btrfs_features_incompat.h"
 137 #include "xlat/btrfs_key_types.h"
 138 #include "xlat/btrfs_logical_ino_args_flags.h"
 139 #include "xlat/btrfs_qgroup_ctl_cmds.h"
 140 #include "xlat/btrfs_qgroup_inherit_flags.h"
 141 #include "xlat/btrfs_qgroup_limit_flags.h"
 142 #include "xlat/btrfs_qgroup_status_flags.h"
 143 #include "xlat/btrfs_scrub_flags.h"
 144 #include "xlat/btrfs_send_flags.h"
 145 #include "xlat/btrfs_snap_flags_v2.h"
 146 #include "xlat/btrfs_space_info_flags.h"
 147 #include "xlat/btrfs_tree_objectids.h"
 148
 149 static inline char
 150 prnibble(char v)
 151 {
 152         if (v >= 10)
 153                 return 'a' + (v - 10);
 154         return '0' + v;
 155 }
 156
 157 /* 8-4-4-4-12 = 36 characters */
 158 #define UUID_STRING_SIZE 36
 159
 160 /* Formats uuid, returns 0 if it's all zeroes */
 161 static int
 162 btrfs_unparse_uuid(unsigned char *uuid, char *out)
 163 {
 164         int i;
 165         int ret = 0;
 166         for (i = 0; i < BTRFS_UUID_SIZE; i++) {
 167                 if (i == 4 || i == 6 || i == 8 || i == 10)
 168                         *out++ = '-';
 169                 *out++ = prnibble(uuid[i] >> 4);
 170                 *out++ = prnibble(uuid[i] & 0xf);
 171                 if (uuid[i])
 172                         ret = 1;
 173         }
 174         *out = '\0';
 175         return ret;
 176 }
 177
 178 static void
 179 btrfs_print_balance_args(const char *name, const struct btrfs_balance_args *bba)
 180 {
 181         tprintf(", %s=", name);
 182         PRINT_FIELD_FLAGS("{", *bba, profiles, btrfs_space_info_flags,
 183                           "BTRFS_BLOCK_GROUP_???");
 184         PRINT_FIELD_U64(", ", *bba, usage);
 185         PRINT_FIELD_DEV(", ", *bba, devid);
 186         PRINT_FIELD_U64(", ", *bba, pstart);
 187         PRINT_FIELD_U64(", ", *bba, pend);
 188         PRINT_FIELD_U64(", ", *bba, vstart);
 189         PRINT_FIELD_U64(", ", *bba, vend);
 190         PRINT_FIELD_U64(", ", *bba, target);
 191         PRINT_FIELD_FLAGS(", ", *bba, flags, btrfs_balance_args,
 192                           "BTRFS_BALANCE_ARGS_???");
 193         tprints("}");
 194 }
 195
 196 static void
 197 btrfs_print_balance(struct tcb *const tcp, const kernel_ulong_t arg, bool out)
 198 {
 199         struct btrfs_ioctl_balance_args balance_args;
 200
 201         if (umove_or_printaddr(tcp, arg, &balance_args))
 202                 return;
 203
 204         PRINT_FIELD_FLAGS("{", balance_args, flags, btrfs_balance_flags,
 205                           "BTRFS_BALANCE_???");
 206         if (out)
 207                 PRINT_FIELD_FLAGS(", ", balance_args, state,
 208                                   btrfs_balance_state,
 209                                   "BTRFS_BALANCE_STATE_???");
 210
 211         if (balance_args.flags & BTRFS_BALANCE_DATA)
 212                 btrfs_print_balance_args("data", &balance_args.data);
 213         if (balance_args.flags & BTRFS_BALANCE_METADATA)
 214                 btrfs_print_balance_args("meta", &balance_args.meta);
 215         if (balance_args.flags & BTRFS_BALANCE_SYSTEM)
 216                 btrfs_print_balance_args("sys", &balance_args.sys);
 217         tprints("}");
 218 }
 219
 220 static void
 221 btrfs_print_features(const struct btrfs_ioctl_feature_flags *flags)
 222 {
 223         PRINT_FIELD_FLAGS("{", *flags, compat_flags, btrfs_features_compat,
 224                           "BTRFS_FEATURE_COMPAT_???");
 225         PRINT_FIELD_FLAGS(", ", *flags, compat_ro_flags,
 226                           btrfs_features_compat_ro,
 227                           "BTRFS_FEATURE_COMPAT_RO_???");
 228         PRINT_FIELD_FLAGS(", ", *flags, incompat_flags, btrfs_features_incompat,
 229                           "BTRFS_FEATURE_INCOMPAT_???");
 230         tprints("}");
 231 }
 232
 233 static void
 234 btrfs_print_qgroup_limit(const struct btrfs_qgroup_limit *lim)
 235 {
 236         PRINT_FIELD_FLAGS(", lim={", *lim, flags, btrfs_qgroup_limit_flags,
 237                           "BTRFS_QGROUP_LIMIT_???");
 238         PRINT_FIELD_U(", ", *lim, max_rfer);
 239         PRINT_FIELD_U(", ", *lim, max_excl);
 240         PRINT_FIELD_U(", ", *lim, rsv_rfer);
 241         PRINT_FIELD_U(", ", *lim, rsv_excl);
 242         tprints("}");
 243 }
 244
 245 #define btrfs_print_key_type(prefix_, where_, field_) \
 246         PRINT_FIELD_XVAL_U((prefix_), (where_), field_, btrfs_key_types, NULL)
 247 #define btrfs_print_objectid(prefix_, where_, field_) \
 248         PRINT_FIELD_XVAL_U((prefix_), (where_), field_, btrfs_tree_objectids, \
 249                            NULL)
 250
 251 static void
 252 btrfs_print_data_container_header(const struct btrfs_data_container *container)
 253 {
 254         PRINT_FIELD_U("{", *container, bytes_left);
 255         PRINT_FIELD_U(", ", *container, bytes_missing);
 256         PRINT_FIELD_U(", ", *container, elem_cnt);
 257         PRINT_FIELD_U(", ", *container, elem_missed);
 258 }
 259
 260 static void
 261 btrfs_print_data_container_footer(void)
 262 {
 263         tprints("}");
 264 }
 265
 266 static bool
 267 print_btrfs_data_container_logical_ino(struct tcb *tcp, void *elem_buf,
 268                                        size_t elem_size, void *data)
 269 {
 270         const struct {
 271                 uint64_t inum;
 272                 uint64_t offset;
 273                 uint64_t root;
 274         } *const record = elem_buf;
 275
 276         PRINT_FIELD_U("{", *record, inum);
 277         PRINT_FIELD_U(", ", *record, offset);
 278         PRINT_FIELD_U(", ", *record, root);
 279         tprints("}");
 280
 281         return true;
 282 }
 283
 284 static void
 285 btrfs_print_logical_ino_container(struct tcb *tcp,
 286                                   const uint64_t inodes_addr)
 287 {
 288         struct btrfs_data_container container;
 289
 290         if (umove_or_printaddr(tcp, inodes_addr, &container))
 291                 return;
 292
 293         btrfs_print_data_container_header(&container);
 294
 295         if (abbrev(tcp)) {
 296                 tprints(", ...");
 297         } else {
 298                 const uint64_t val_addr =
 299                         inodes_addr + offsetof(typeof(container), val);
 300                 uint64_t record[3];
 301                 tprints(", val=");
 302                 print_array(tcp, val_addr, container.elem_cnt / 3,
 303                             record, sizeof(record),
 304                             tfetch_mem,
 305                             print_btrfs_data_container_logical_ino, 0);
 306         }
 307
 308         btrfs_print_data_container_footer();
 309 }
 310
 311 static bool
 312 print_btrfs_data_container_ino_path(struct tcb *tcp, void *elem_buf,
 313                                        size_t elem_size, void *data)
 314 {
 315         const uint64_t *const offset = elem_buf;
 316         const uint64_t *const val_addr = data;
 317
 318         printpath(tcp, *val_addr + *offset);
 319
 320         return true;
 321 }
 322
 323 static void
 324 btrfs_print_ino_path_container(struct tcb *tcp,
 325                                const uint64_t fspath_addr)
 326 {
 327         struct btrfs_data_container container;
 328
 329         if (umove_or_printaddr(tcp, fspath_addr, &container))
 330                 return;
 331
 332         btrfs_print_data_container_header(&container);
 333
 334         if (abbrev(tcp)) {
 335                 tprints(", ...");
 336         } else {
 337                 uint64_t val_addr =
 338                         fspath_addr + offsetof(typeof(container), val);
 339                 uint64_t offset;
 340                 tprints(", val=");
 341                 print_array(tcp, val_addr, container.elem_cnt,
 342                             &offset, sizeof(offset),
 343                             tfetch_mem,
 344                             print_btrfs_data_container_ino_path, &val_addr);
 345         }
 346
 347         btrfs_print_data_container_footer();
 348 }
 349
 350 static void
 351 btrfs_print_qgroup_inherit(struct tcb *const tcp, const kernel_ulong_t qgi_addr)
 352 {
 353         struct btrfs_qgroup_inherit inherit;
 354
 355         if (umove_or_printaddr(tcp, qgi_addr, &inherit))
 356                 return;
 357
 358         PRINT_FIELD_FLAGS("{", inherit, flags, btrfs_qgroup_inherit_flags,
 359                           "BTRFS_QGROUP_INHERIT_???");
 360         PRINT_FIELD_U(", ", inherit, num_qgroups);
 361         PRINT_FIELD_U(", ", inherit, num_ref_copies);
 362         PRINT_FIELD_U(", ", inherit, num_excl_copies);
 363
 364         btrfs_print_qgroup_limit(&inherit.lim);
 365
 366         if (abbrev(tcp)) {
 367                 tprints(", ...");
 368         } else {
 369                 uint64_t record;
 370                 tprints(", qgroups=");
 371                 print_array(tcp, qgi_addr + offsetof(typeof(inherit), qgroups),
 372                             inherit.num_qgroups, &record, sizeof(record),
 373                             tfetch_mem, print_uint64_array_member, 0);
 374         }
 375         tprints("}");
 376 }
 377
 378 static void
 379 btrfs_print_tree_search(struct tcb *tcp, struct btrfs_ioctl_search_key *key,
 380                         uint64_t buf_addr, uint64_t buf_size, bool print_size)
 381 {
 382         if (entering(tcp)) {
 383                 btrfs_print_objectid("{key={", *key, tree_id);
 384
 385                 if (key->min_objectid != BTRFS_FIRST_FREE_OBJECTID ||
 386                     !abbrev(tcp))
 387                         btrfs_print_objectid(", ", *key, min_objectid);
 388
 389                 if (key->max_objectid != BTRFS_LAST_FREE_OBJECTID ||
 390                     !abbrev(tcp))
 391                         btrfs_print_objectid(", ", *key, max_objectid);
 392
 393                 PRINT_FIELD_U64(", ", *key, min_offset);
 394                 PRINT_FIELD_U64(", ", *key, max_offset);
 395                 PRINT_FIELD_U64(", ", *key, min_transid);
 396                 PRINT_FIELD_U64(", ", *key, max_transid);
 397
 398                 btrfs_print_key_type(", ", *key, min_type);
 399                 btrfs_print_key_type(", ", *key, max_type);
 400                 PRINT_FIELD_U(", ", *key, nr_items);
 401                 tprints("}");
 402                 if (print_size)
 403                         tprintf(", buf_size=%" PRIu64, buf_size);
 404                 tprints("}");
 405         } else {
 406                 PRINT_FIELD_U("{key={", *key, nr_items);
 407                 tprints("}");
 408                 if (print_size)
 409                         tprintf(", buf_size=%" PRIu64, buf_size);
 410                 if (abbrev(tcp)) {
 411                         tprints(", ...");
 412                 } else {
 413                         uint64_t i;
 414                         uint64_t off = 0;
 415                         tprints(", buf=[");
 416                         for (i = 0; i < key->nr_items; i++) {
 417                                 struct btrfs_ioctl_search_header sh;
 418                                 uint64_t addr = buf_addr + off;
 419                                 if (i)
 420                                         tprints(", ");
 421                                 if (i > max_strlen) {
 422                                         tprints("...");
 423                                         break;
 424                                 }
 425                                 if (umove(tcp, addr, &sh)) {
 426                                         tprints("...");
 427                                         printaddr_comment(addr);
 428                                         break;
 429                                 }
 430                                 PRINT_FIELD_U("{", sh, transid);
 431                                 btrfs_print_objectid(", ", sh, objectid);
 432                                 PRINT_FIELD_U(", ", sh, offset);
 433                                 btrfs_print_key_type(", ", sh, type);
 434                                 PRINT_FIELD_U(", ", sh, len);
 435                                 tprints("}");
 436                                 off += sizeof(sh) + sh.len;
 437
 438                         }
 439                         tprints("]");
 440                 }
 441                 tprints("}");
 442         }
 443 }
 444
 445 static bool
 446 print_objectid_callback(struct tcb *tcp, void *elem_buf,
 447                         size_t elem_size, void *data)
 448 {
 449         printxvals_ex(*(uint64_t *) elem_buf, NULL, XLAT_STYLE_FMT_U,
 450                       btrfs_tree_objectids, NULL);
 451
 452         return true;
 453 }
 454
 455 static bool
 456 print_btrfs_ioctl_space_info(struct tcb *tcp, void *elem_buf,
 457                              size_t elem_size, void *data)
 458 {
 459         const struct btrfs_ioctl_space_info *info = elem_buf;
 460
 461         PRINT_FIELD_FLAGS("{", *info, flags, btrfs_space_info_flags,
 462                           "BTRFS_SPACE_INFO_???");
 463         PRINT_FIELD_U(", ", *info, total_bytes);
 464         PRINT_FIELD_U(", ", *info, used_bytes);
 465         tprints("}");
 466
 467         return true;
 468 }
 469
 470 static void
 471 print_btrfs_timespec(const char *prefix, uint64_t sec, uint32_t nsec)
 472 {
 473         tprintf("%s{sec=%" PRIu64 ", nsec=%u}", prefix, sec, nsec);
 474         tprints_comment(sprinttime_nsec(sec, nsec));
 475 }
 476
 477 MPERS_PRINTER_DECL(int, btrfs_ioctl,
 478                    struct tcb *const tcp, const unsigned int code,
 479                    const kernel_ulong_t arg)
 480 {
 481         switch (code) {
 482         /* Take no arguments; command only. */
 483         case BTRFS_IOC_TRANS_START:
 484         case BTRFS_IOC_TRANS_END:
 485         case BTRFS_IOC_SYNC:
 486         case BTRFS_IOC_SCRUB_CANCEL:
 487         case BTRFS_IOC_QUOTA_RESCAN_WAIT:
 488         /*
 489          * The codes for these ioctls are based on each accepting a
 490          * vol_args but none of them actually consume an argument.
 491          */
 492         case BTRFS_IOC_DEFRAG:
 493         case BTRFS_IOC_BALANCE:
 494                 break;
 495
 496         /* takes a signed int */
 497         case BTRFS_IOC_BALANCE_CTL:
 498                 tprints(", ");
 499                 printxval(btrfs_balance_ctl_cmds, arg, "BTRFS_BALANCE_CTL_???");
 500                 break;
 501
 502         /* returns a 64 */
 503         case BTRFS_IOC_START_SYNC: /* R */
 504                 if (entering(tcp))
 505                         return 0;
 506         ATTRIBUTE_FALLTHROUGH;
 507         /* takes a u64 */
 508         case BTRFS_IOC_DEFAULT_SUBVOL: /* W */
 509         case BTRFS_IOC_WAIT_SYNC: /* W */
 510                 tprints(", ");
 511                 printnum_int64(tcp, arg, "%" PRIu64);
 512                 break;
 513
 514         /* u64 but describe a flags bitfield; we can make that symbolic */
 515         case BTRFS_IOC_SUBVOL_GETFLAGS: { /* R */
 516                 uint64_t flags;
 517
 518                 if (entering(tcp))
 519                         return 0;
 520
 521                 tprints(", ");
 522
 523                 if (umove_or_printaddr(tcp, arg, &flags))
 524                         break;
 525
 526                 printflags64(btrfs_snap_flags_v2, flags, "BTRFS_SUBVOL_???");
 527                 break;
 528         }
 529
 530         case BTRFS_IOC_SUBVOL_SETFLAGS: { /* W */
 531                 uint64_t flags;
 532
 533                 tprints(", ");
 534
 535                 if (umove_or_printaddr(tcp, arg, &flags))
 536                         break;
 537
 538                 printflags64(btrfs_snap_flags_v2, flags, "BTRFS_SUBVOL_???");
 539                 break;
 540         }
 541
 542         /* More complex types */
 543         case BTRFS_IOC_BALANCE_V2: /* RW */
 544                 if (entering(tcp)) {
 545                         tprints(", ");
 546                         btrfs_print_balance(tcp, arg, false);
 547                         return 0;
 548                 }
 549
 550                 if (syserror(tcp))
 551                         break;
 552
 553                 tprints(" => ");
 554                 btrfs_print_balance(tcp, arg, true);
 555                 break;
 556         case BTRFS_IOC_BALANCE_PROGRESS: /* R */
 557                 if (entering(tcp))
 558                         return 0;
 559
 560                 tprints(", ");
 561                 btrfs_print_balance(tcp, arg, true);
 562                 break;
 563
 564         case BTRFS_IOC_DEFRAG_RANGE: { /* W */
 565                 struct btrfs_ioctl_defrag_range_args args;
 566
 567                 tprints(", ");
 568
 569                 if (umove_or_printaddr(tcp, arg, &args))
 570                         break;
 571
 572                 PRINT_FIELD_U("{", args, start);
 573                 PRINT_FIELD_U64(", ", args, len);
 574
 575                 PRINT_FIELD_FLAGS(", ", args, flags, btrfs_defrag_flags,
 576                                   "BTRFS_DEFRAG_RANGE_???");
 577                 PRINT_FIELD_U(", ", args, extent_thresh);
 578                 PRINT_FIELD_XVAL(", ", args, compress_type,
 579                                  btrfs_compress_types, "BTRFS_COMPRESS_???");
 580                 tprints("}");
 581                 break;
 582         }
 583
 584         case BTRFS_IOC_DEV_INFO: { /* RW */
 585                 struct btrfs_ioctl_dev_info_args args;
 586                 char uuid[UUID_STRING_SIZE+1];
 587                 int valid;
 588
 589                 if (entering(tcp))
 590                         tprints(", ");
 591                 else if (syserror(tcp))
 592                         break;
 593                 else
 594                         tprints(" => ");
 595                 if (umove_or_printaddr(tcp, arg, &args))
 596                         break;
 597
 598                 valid = btrfs_unparse_uuid(args.uuid, uuid);
 599                 if (entering(tcp)) {
 600                         PRINT_FIELD_DEV("{", args, devid);
 601                         if (valid)
 602                                 tprintf(", uuid=%s", uuid);
 603                         tprints("}");
 604                         return 0;
 605                 }
 606
 607                 tprints("{");
 608                 if (valid)
 609                         tprintf("uuid=%s, ", uuid);
 610
 611                 PRINT_FIELD_U("", args, bytes_used);
 612                 PRINT_FIELD_U(", ", args, total_bytes);
 613                 PRINT_FIELD_CSTRING(", ", args, path);
 614                 tprints("}");
 615
 616                 break;
 617         }
 618
 619         case BTRFS_IOC_DEV_REPLACE: { /* RW */
 620                 struct_btrfs_ioctl_dev_replace_args args;
 621
 622                 if (entering(tcp))
 623                         tprints(", ");
 624                 else if (syserror(tcp))
 625                         break;
 626                 else
 627                         tprints(" => ");
 628
 629                 if (umove_or_printaddr(tcp, arg, &args))
 630                         break;
 631
 632                 if (entering(tcp)) {
 633                         PRINT_FIELD_XVAL("{", args, cmd, btrfs_dev_replace_cmds,
 634                                          "BTRFS_IOCTL_DEV_REPLACE_CMD_???");
 635                         if (args.cmd == BTRFS_IOCTL_DEV_REPLACE_CMD_START) {
 636                                 PRINT_FIELD_DEV(", start={", args.start,
 637                                               srcdevid);
 638                                 PRINT_FIELD_XVAL(", ", args.start,
 639                                         cont_reading_from_srcdev_mode,
 640                                         btrfs_cont_reading_from_srcdev_mode,
 641                                         "BTRFS_IOCTL_DEV_REPLACE_CONT_READING"
 642                                         "_FROM_SRCDEV_MODE_???");
 643                                 PRINT_FIELD_CSTRING(", ", args.start,
 644                                                     srcdev_name);
 645                                 PRINT_FIELD_CSTRING(", ", args.start,
 646                                                     tgtdev_name);
 647                                 tprints("}");
 648
 649                         }
 650                         tprints("}");
 651                         return 0;
 652                 }
 653
 654                 PRINT_FIELD_XVAL("{", args, result, btrfs_dev_replace_results,
 655                                  "BTRFS_IOCTL_DEV_REPLACE_RESULT_???");
 656                 if (args.cmd == BTRFS_IOCTL_DEV_REPLACE_CMD_STATUS) {
 657                         PRINT_FIELD_XVAL(", status={", args.status,
 658                                          replace_state, btrfs_dev_replace_state,
 659                                          "BTRFS_IOCTL_DEV_REPLACE_STATE_???");
 660
 661                         PRINT_FIELD_U(", ", args.status, progress_1000);
 662                         if (args.status.progress_1000 <= 1000)
 663                                 tprintf_comment("%u.%u%%",
 664                                         (unsigned) args.status.progress_1000 / 10,
 665                                         (unsigned) args.status.progress_1000 % 10);
 666
 667                         PRINT_FIELD_U(", ", args.status, time_started);
 668                         tprints_comment(sprinttime(args.status.time_started));
 669
 670                         PRINT_FIELD_U(", ", args.status, time_stopped);
 671                         tprints_comment(sprinttime(args.status.time_stopped));
 672
 673                         PRINT_FIELD_U(", ", args.status, num_write_errors);
 674                         PRINT_FIELD_U(", ", args.status,
 675                                       num_uncorrectable_read_errors);
 676                 }
 677                 tprints("}");
 678                 break;
 679         }
 680
 681         case BTRFS_IOC_GET_FEATURES: { /* R */
 682                 struct btrfs_ioctl_feature_flags flags;
 683
 684                 if (entering(tcp))
 685                         return 0;
 686
 687                 tprints(", ");
 688                 if (umove_or_printaddr(tcp, arg, &flags))
 689                         break;
 690
 691                 btrfs_print_features(&flags);
 692                 break;
 693         }
 694
 695         case BTRFS_IOC_SET_FEATURES: { /* W */
 696                 struct btrfs_ioctl_feature_flags flarg[2];
 697
 698                 tprints(", ");
 699
 700                 if (umove_or_printaddr(tcp, arg, &flarg))
 701                         break;
 702
 703                 tprints("[");
 704                 btrfs_print_features(&flarg[0]);
 705                 tprints(", ");
 706                 btrfs_print_features(&flarg[1]);
 707                 tprints("]");
 708                 break;
 709         }
 710
 711         case BTRFS_IOC_GET_SUPPORTED_FEATURES: { /* R */
 712                 struct btrfs_ioctl_feature_flags flarg[3];
 713
 714                 if (entering(tcp))
 715                         return 0;
 716
 717                 tprints(", ");
 718                 if (umove_or_printaddr(tcp, arg, &flarg))
 719                         break;
 720
 721                 tprints("[");
 722                 btrfs_print_features(&flarg[0]);
 723                 tprints_comment("supported");
 724
 725                 tprints(", ");
 726                 btrfs_print_features(&flarg[1]);
 727                 tprints_comment("safe to set");
 728
 729                 tprints(", ");
 730                 btrfs_print_features(&flarg[2]);
 731                 tprints_comment("safe to clear");
 732                 tprints("]");
 733
 734                 break;
 735         }
 736
 737         case BTRFS_IOC_FS_INFO: { /* R */
 738                 struct btrfs_ioctl_fs_info_args args;
 739                 char uuid[UUID_STRING_SIZE+1];
 740                 uint32_t nodesize, sectorsize, clone_alignment;
 741 #ifndef HAVE_STRUCT_BTRFS_IOCTL_FS_INFO_ARGS_NODESIZE
 742                 uint32_t *reserved32;
 743 #endif
 744
 745                 if (entering(tcp))
 746                         return 0;
 747
 748                 tprints(", ");
 749                 if (umove_or_printaddr(tcp, arg, &args))
 750                         break;
 751
 752 #ifdef HAVE_STRUCT_BTRFS_IOCTL_FS_INFO_ARGS_NODESIZE
 753                 nodesize = args.nodesize,
 754                 sectorsize = args.sectorsize,
 755                 clone_alignment = args.clone_alignment;
 756 #else
 757                 reserved32 = (void *) args.reserved;
 758                 nodesize = reserved32[0];
 759                 sectorsize = reserved32[1];
 760                 clone_alignment = reserved32[2];
 761 #endif
 762                 btrfs_unparse_uuid(args.fsid, uuid);
 763
 764                 PRINT_FIELD_U("{", args, max_id);
 765                 PRINT_FIELD_U(", ", args, num_devices);
 766                 tprintf(", fsid=%s, nodesize=%u, sectorsize=%u"
 767                         ", clone_alignment=%u",
 768                         uuid, nodesize, sectorsize, clone_alignment);
 769                 tprints("}");
 770                 break;
 771         }
 772
 773         case BTRFS_IOC_GET_DEV_STATS: { /* RW */
 774                 struct btrfs_ioctl_get_dev_stats args;
 775                 uint64_t i;
 776
 777                 if (entering(tcp))
 778                         tprints(", ");
 779                 else if (syserror(tcp))
 780                         break;
 781                 else
 782                         tprints(" => ");
 783                 if (umove_or_printaddr(tcp, arg, &args))
 784                         break;
 785
 786                 tprints("{");
 787
 788                 if (entering(tcp)) {
 789                         PRINT_FIELD_DEV("", args, devid);
 790                         tprints(", ");
 791                 }
 792
 793                 PRINT_FIELD_U("", args, nr_items);
 794                 PRINT_FIELD_FLAGS(", ", args, flags, btrfs_dev_stats_flags,
 795                                   "BTRFS_DEV_STATS_???");
 796
 797                 if (entering(tcp)) {
 798                         tprints("}");
 799                         return 0;
 800                 }
 801
 802                 /*
 803                  * The structure has a 1k limit; Let's make sure we don't
 804                  * go off into the middle of nowhere with a bad nr_items
 805                  * value.
 806                  */
 807                 tprints(", [");
 808                 for (i = 0; i < args.nr_items; i++) {
 809                         if (i)
 810                                 tprints(", ");
 811                         if (i >= ARRAY_SIZE(args.values)) {
 812                                 tprints("...");
 813                                 break;
 814                         }
 815
 816                         tprints("[");
 817                         printxval_u(btrfs_dev_stats_values, i, NULL);
 818                         tprintf("] = %" PRI__u64, args.values[i]);
 819                 }
 820                 tprints("]}");
 821                 break;
 822         }
 823
 824         case BTRFS_IOC_INO_LOOKUP: { /* RW */
 825                 struct btrfs_ioctl_ino_lookup_args args;
 826
 827                 if (entering(tcp))
 828                         tprints(", ");
 829                 else if (syserror(tcp))
 830                         break;
 831                 else
 832                         tprints(" => ");
 833
 834                 if (umove_or_printaddr(tcp, arg, &args))
 835                         break;
 836
 837                 if (entering(tcp)) {
 838                         /* Use subvolume id of the containing root */
 839                         if (args.treeid == 0)
 840                                 set_tcb_priv_ulong(tcp, 1);
 841
 842                         btrfs_print_objectid("{", args, treeid);
 843                         btrfs_print_objectid(", ", args, objectid);
 844                         tprints("}");
 845                         return 0;
 846                 }
 847
 848                 tprints("{");
 849                 if (get_tcb_priv_ulong(tcp)) {
 850                         btrfs_print_objectid("", args, treeid);
 851                         tprints(", ");
 852                 }
 853
 854                 PRINT_FIELD_CSTRING("", args, name);
 855                 tprints("}");
 856                 break;
 857         }
 858
 859         case BTRFS_IOC_INO_PATHS: { /* RW */
 860                 struct btrfs_ioctl_ino_path_args args;
 861
 862                 if (entering(tcp))
 863                         tprints(", ");
 864                 else if (syserror(tcp))
 865                         break;
 866                 else
 867                         tprints(" => ");
 868
 869                 if (umove_or_printaddr(tcp, arg, &args))
 870                         break;
 871
 872                 if (entering(tcp)) {
 873                         PRINT_FIELD_U("{", args, inum);
 874                         PRINT_FIELD_U(", ", args, size);
 875                         PRINT_FIELD_ADDR64(", ", args, fspath);
 876                         tprints("}");
 877                         return 0;
 878                 }
 879
 880                 tprints("{fspath=");
 881                 btrfs_print_ino_path_container(tcp, args.fspath);
 882
 883                 tprints("}");
 884                 break;
 885         }
 886
 887         case BTRFS_IOC_LOGICAL_INO: { /* RW */
 888                 struct btrfs_ioctl_logical_ino_args args;
 889
 890                 if (entering(tcp))
 891                         tprints(", ");
 892                 else if (syserror(tcp))
 893                         break;
 894                 else
 895                         tprints(" => ");
 896
 897                 if (umove_or_printaddr(tcp, arg, &args))
 898                         break;
 899
 900                 if (entering(tcp)) {
 901                         PRINT_FIELD_U("{", args, logical);
 902                         PRINT_FIELD_U(", ", args, size);
 903
 904                         if (!IS_ARRAY_ZERO(args.reserved)) {
 905                                 tprints(", reserved=[");
 906                                 for (size_t i = 0; i < 3; ++i)
 907                                         tprintf("%s%#" PRI__x64,
 908                                                 i ? ", " : "",
 909                                                 args.reserved[i]);
 910                                 tprints("]");
 911                         }
 912
 913                         tprintf(", flags=");
 914                         printflags64(btrfs_logical_ino_args_flags,
 915 #ifdef HAVE_STRUCT_BTRFS_IOCTL_LOGICAL_INO_ARGS_FLAGS
 916                                      args.flags
 917 #else
 918                                      args.reserved[3]
 919 #endif
 920                                      , "BTRFS_LOGICAL_INO_ARGS_???");
 921                         PRINT_FIELD_ADDR64(", ", args, inodes);
 922                         tprints("}");
 923                         return 0;
 924                 }
 925
 926                 tprints("{inodes=");
 927                 btrfs_print_logical_ino_container(tcp, args.inodes);
 928
 929                 tprints("}");
 930                 break;
 931         }
 932
 933         case BTRFS_IOC_QGROUP_ASSIGN: { /* W */
 934                 struct btrfs_ioctl_qgroup_assign_args args;
 935
 936                 tprints(", ");
 937                 if (umove_or_printaddr(tcp, arg, &args))
 938                         break;
 939
 940                 PRINT_FIELD_U("{", args, assign);
 941                 PRINT_FIELD_U(", ", args, src);
 942                 PRINT_FIELD_U(", ", args, dst);
 943                 tprints("}");
 944                 break;
 945         }
 946
 947         case BTRFS_IOC_QGROUP_CREATE: { /* W */
 948                 struct btrfs_ioctl_qgroup_create_args args;
 949
 950                 tprints(", ");
 951                 if (umove_or_printaddr(tcp, arg, &args))
 952                         break;
 953
 954                 PRINT_FIELD_U("{", args, create);
 955                 PRINT_FIELD_U(", ", args, qgroupid);
 956                 tprints("}");
 957                 break;
 958         }
 959
 960         case BTRFS_IOC_QGROUP_LIMIT: { /* R */
 961                 struct btrfs_ioctl_qgroup_limit_args args;
 962
 963                 if (entering(tcp))
 964                         return 0;
 965
 966                 tprints(", ");
 967                 if (umove_or_printaddr(tcp, arg, &args))
 968                         break;
 969
 970                 PRINT_FIELD_U("{", args, qgroupid);
 971                 btrfs_print_qgroup_limit(&args.lim);
 972                 tprints("}");
 973                 break;
 974         }
 975
 976         case BTRFS_IOC_QUOTA_CTL: { /* W */
 977                 struct btrfs_ioctl_quota_ctl_args args;
 978
 979                 tprints(", ");
 980                 if (umove_or_printaddr(tcp, arg, &args))
 981                         break;
 982
 983                 PRINT_FIELD_XVAL("{", args, cmd, btrfs_qgroup_ctl_cmds,
 984                                  "BTRFS_QUOTA_CTL_???");
 985                 tprints("}");
 986
 987                 break;
 988         }
 989
 990         case BTRFS_IOC_QUOTA_RESCAN: { /* W */
 991                 struct btrfs_ioctl_quota_rescan_args args;
 992
 993                 tprints(", ");
 994                 if (umove_or_printaddr(tcp, arg, &args))
 995                         break;
 996
 997                 PRINT_FIELD_U("{", args, flags);
 998                 tprints("}");
 999                 break;
1000         }
1001
1002         case BTRFS_IOC_QUOTA_RESCAN_STATUS: { /* R */
1003                 struct btrfs_ioctl_quota_rescan_args args;
1004
1005                 if (entering(tcp))
1006                         return 0;
1007
1008                 tprints(", ");
1009                 if (umove_or_printaddr(tcp, arg, &args))
1010                         break;
1011
1012                 PRINT_FIELD_U("{", args, flags);
1013                 btrfs_print_objectid(", ", args, progress);
1014                 tprints("}");
1015                 break;
1016         }
1017
1018         case BTRFS_IOC_SET_RECEIVED_SUBVOL: { /* RW */
1019                 struct_btrfs_ioctl_received_subvol_args args;
1020                 char uuid[UUID_STRING_SIZE+1];
1021
1022                 if (entering(tcp))
1023                         tprints(", ");
1024                 else if (syserror(tcp))
1025                         break;
1026                 else
1027                         tprints(" => ");
1028
1029                 if (umove_or_printaddr(tcp, arg, &args))
1030                         break;
1031
1032                 if (entering(tcp)) {
1033                         btrfs_unparse_uuid((unsigned char *)args.uuid, uuid);
1034                         tprintf("{uuid=%s", uuid);
1035                         PRINT_FIELD_U(", ", args, stransid);
1036                         print_btrfs_timespec(", stime=",
1037                                              args.stime.sec, args.stime.nsec);
1038                         PRINT_FIELD_U(", ", args, flags);
1039                         tprints("}");
1040                         return 0;
1041                 }
1042                 PRINT_FIELD_U("{", args, rtransid);
1043                 print_btrfs_timespec(", rtime=",
1044                                      args.rtime.sec, args.rtime.nsec);
1045                 tprints("}");
1046                 break;
1047         }
1048
1049         case BTRFS_IOC_SCRUB: /* RW */
1050         case BTRFS_IOC_SCRUB_PROGRESS: { /* RW */
1051                 struct btrfs_ioctl_scrub_args args;
1052
1053                 if (entering(tcp))
1054                         tprints(", ");
1055                 else if (syserror(tcp))
1056                         break;
1057                 else
1058                         tprints(" => ");
1059
1060                 if (umove_or_printaddr(tcp, arg, &args))
1061                         break;
1062
1063                 if (entering(tcp)) {
1064                         PRINT_FIELD_DEV("{", args, devid);
1065                         if (code == BTRFS_IOC_SCRUB) {
1066                                 PRINT_FIELD_U(", ", args, start);
1067                                 PRINT_FIELD_U64(", ", args, end);
1068                                 PRINT_FIELD_FLAGS(", ", args, flags,
1069                                                   btrfs_scrub_flags,
1070                                                   "BTRFS_SCRUB_???");
1071                         }
1072                         tprints("}");
1073                         return 0;
1074                 }
1075                 PRINT_FIELD_U("{progress={", args.progress,
1076                               data_extents_scrubbed);
1077                 PRINT_FIELD_U(", ", args.progress, tree_extents_scrubbed);
1078                 PRINT_FIELD_U(", ", args.progress, data_bytes_scrubbed);
1079                 PRINT_FIELD_U(", ", args.progress, tree_bytes_scrubbed);
1080                 PRINT_FIELD_U(", ", args.progress, read_errors);
1081                 PRINT_FIELD_U(", ", args.progress, csum_errors);
1082                 PRINT_FIELD_U(", ", args.progress, verify_errors);
1083                 PRINT_FIELD_U(", ", args.progress, no_csum);
1084                 PRINT_FIELD_U(", ", args.progress, csum_discards);
1085                 PRINT_FIELD_U(", ", args.progress, super_errors);
1086                 PRINT_FIELD_U(", ", args.progress, malloc_errors);
1087                 PRINT_FIELD_U(", ", args.progress, uncorrectable_errors);
1088                 PRINT_FIELD_U(", ", args.progress, corrected_errors);
1089                 PRINT_FIELD_U(", ", args.progress, last_physical);
1090                 PRINT_FIELD_U(", ", args.progress, unverified_errors);
1091                 tprints("}}");
1092                 break;
1093         }
1094
1095         case BTRFS_IOC_TREE_SEARCH: { /* RW */
1096                 struct btrfs_ioctl_search_args args;
1097                 uint64_t buf_offset;
1098
1099                 if (entering(tcp))
1100                         tprints(", ");
1101                 else if (syserror(tcp))
1102                         break;
1103                 else
1104                         tprints(" => ");
1105
1106                 if (umove_or_printaddr(tcp, arg, &args))
1107                         break;
1108
1109                 buf_offset = offsetof(struct btrfs_ioctl_search_args, buf);
1110                 btrfs_print_tree_search(tcp, &args.key, arg + buf_offset,
1111                                         sizeof(args.buf), false);
1112                 if (entering(tcp))
1113                         return 0;
1114                 break;
1115         }
1116
1117         case BTRFS_IOC_TREE_SEARCH_V2: { /* RW */
1118                 struct btrfs_ioctl_search_args_v2 args;
1119                 uint64_t buf_offset;
1120
1121                 if (entering(tcp))
1122                         tprints(", ");
1123                 else if (syserror(tcp)) {
1124                         if (tcp->u_error == EOVERFLOW) {
1125                                 tprints(" => ");
1126                                 if (!umove_or_printaddr_ignore_syserror(tcp,
1127                                     arg, &args)) {
1128                                         PRINT_FIELD_U("{", args, buf_size);
1129                                         tprints("}");
1130                                 }
1131                         }
1132                         break;
1133                 } else
1134                         tprints(" => ");
1135
1136                 if (umove_or_printaddr(tcp, arg, &args))
1137                         break;
1138
1139                 buf_offset = offsetof(struct btrfs_ioctl_search_args_v2, buf);
1140                 btrfs_print_tree_search(tcp, &args.key, arg + buf_offset,
1141                                         args.buf_size, true);
1142                 if (entering(tcp))
1143                         return 0;
1144                 break;
1145         }
1146
1147         case BTRFS_IOC_SEND: { /* W */
1148                 struct_btrfs_ioctl_send_args args;
1149
1150                 tprints(", ");
1151                 if (umove_or_printaddr(tcp, arg, &args))
1152                         break;
1153
1154                 PRINT_FIELD_FD("{", args, send_fd, tcp);
1155                 PRINT_FIELD_U(", ", args, clone_sources_count);
1156
1157                 tprints(", clone_sources=");
1158                 if (abbrev(tcp))
1159                         printaddr((uintptr_t) args.clone_sources);
1160                 else {
1161                         uint64_t record;
1162                         print_array(tcp, ptr_to_kulong(args.clone_sources),
1163                                     args.clone_sources_count,
1164                                     &record, sizeof(record),
1165                                     tfetch_mem,
1166                                     print_objectid_callback, 0);
1167                 }
1168                 btrfs_print_objectid(", ", args, parent_root);
1169                 PRINT_FIELD_FLAGS(", ", args, flags, btrfs_send_flags,
1170                                   "BTRFS_SEND_FLAGS_???");
1171                 tprints("}");
1172                 break;
1173         }
1174
1175         case BTRFS_IOC_SPACE_INFO: { /* RW */
1176                 struct btrfs_ioctl_space_args args;
1177
1178                 if (entering(tcp))
1179                         tprints(", ");
1180                 else if (syserror(tcp))
1181                         break;
1182                 else
1183                         tprints(" => ");
1184
1185                 if (umove_or_printaddr(tcp, arg, &args))
1186                         break;
1187
1188                 if (entering(tcp)) {
1189                         PRINT_FIELD_U("{", args, space_slots);
1190                         tprints("}");
1191                         return 0;
1192                 }
1193
1194                 PRINT_FIELD_U("{", args, total_spaces);
1195
1196                 if (args.space_slots == 0 && args.total_spaces) {
1197                         tprints("}");
1198                         break;
1199                 }
1200
1201                 if (abbrev(tcp)) {
1202                         tprints(", ...");
1203                 } else {
1204                         struct btrfs_ioctl_space_info info;
1205                         tprints(", spaces=");
1206                         print_array(tcp, arg + offsetof(typeof(args), spaces),
1207                                     args.total_spaces,
1208                                     &info, sizeof(info), tfetch_mem,
1209                                     print_btrfs_ioctl_space_info, 0);
1210                 }
1211                 tprints("}");
1212                 break;
1213         }
1214
1215         case BTRFS_IOC_SNAP_CREATE:
1216         case BTRFS_IOC_RESIZE:
1217         case BTRFS_IOC_SCAN_DEV:
1218         case BTRFS_IOC_ADD_DEV:
1219         case BTRFS_IOC_RM_DEV:
1220         case BTRFS_IOC_SUBVOL_CREATE:
1221         case BTRFS_IOC_SNAP_DESTROY:
1222         case BTRFS_IOC_DEVICES_READY: { /* W */
1223                 struct btrfs_ioctl_vol_args args;
1224
1225                 tprints(", ");
1226                 if (umove_or_printaddr(tcp, arg, &args))
1227                         break;
1228
1229                 PRINT_FIELD_FD("{", args, fd, tcp);
1230                 PRINT_FIELD_CSTRING(", ", args, name);
1231                 tprints("}");
1232                 break;
1233         }
1234
1235         case BTRFS_IOC_SNAP_CREATE_V2:
1236         case BTRFS_IOC_SUBVOL_CREATE_V2: { /* code is W, but is actually RW */
1237                 struct_btrfs_ioctl_vol_args_v2 args;
1238
1239                 if (entering(tcp))
1240                         tprints(", ");
1241                 else if (syserror(tcp))
1242                         break;
1243                 else
1244                         tprints(" => ");
1245
1246                 if (umove_or_printaddr(tcp, arg, &args))
1247                         break;
1248
1249                 if (entering(tcp)) {
1250                         PRINT_FIELD_FD("{", args, fd, tcp);
1251                         PRINT_FIELD_FLAGS(", ", args, flags,
1252                                           btrfs_snap_flags_v2,
1253                                           "BTRFS_SUBVOL_???");
1254                         if (args.flags & BTRFS_SUBVOL_QGROUP_INHERIT) {
1255                                 PRINT_FIELD_U(", ", args, size);
1256                                 tprints(", qgroup_inherit=");
1257                                 btrfs_print_qgroup_inherit(tcp,
1258                                         ptr_to_kulong(args.qgroup_inherit));
1259                         }
1260                         PRINT_FIELD_CSTRING(", ", args, name);
1261                         tprints("}");
1262                         return 0;
1263                 }
1264                 PRINT_FIELD_U("{", args, transid);
1265                 tprints("}");
1266                 break;
1267         }
1268
1269         case BTRFS_IOC_GET_FSLABEL: /* R */
1270                 if (entering(tcp))
1271                         return 0;
1272                 ATTRIBUTE_FALLTHROUGH;
1273         case BTRFS_IOC_SET_FSLABEL: { /* W */
1274                 char label[BTRFS_LABEL_SIZE];
1275
1276                 tprints(", ");
1277                 if (umove_or_printaddr(tcp, arg, &label))
1278                         break;
1279                 print_quoted_cstring(label, sizeof(label));
1280                 break;
1281         }
1282
1283         case BTRFS_IOC_CLONE:                   /* FICLONE */
1284         case BTRFS_IOC_CLONE_RANGE:             /* FICLONERANGE */
1285 #ifdef BTRFS_IOC_FILE_EXTENT_SAME
1286         case BTRFS_IOC_FILE_EXTENT_SAME:        /* FIDEDUPERANGE */
1287 #endif
1288                 /*
1289                  * FICLONE, FICLONERANGE, and FIDEDUPERANGE started out as
1290                  * btrfs ioctls and the code was kept for the generic
1291                  * implementations.  We use the BTRFS_* names here because
1292                  * they will be available on older systems.
1293                  */
1294                 return file_ioctl(tcp, code, arg);
1295
1296         default:
1297                 return RVAL_DECODED;
1298         };
1299         return RVAL_IOCTL_DECODED;
1300 }
1301 #endif /* HAVE_LINUX_BTRFS_H */