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                                     umove(tcp, addr, &sh)) {
 423                                         tprints("...");
 424                                         break;
 425                                 }
 426                                 PRINT_FIELD_U("{", sh, transid);
 427                                 btrfs_print_objectid(", ", sh, objectid);
 428                                 PRINT_FIELD_U(", ", sh, offset);
 429                                 btrfs_print_key_type(", ", sh, type);
 430                                 PRINT_FIELD_U(", ", sh, len);
 431                                 tprints("}");
 432                                 off += sizeof(sh) + sh.len;
 433
 434                         }
 435                         tprints("]");
 436                 }
 437                 tprints("}");
 438         }
 439 }
 440
 441 static bool
 442 print_objectid_callback(struct tcb *tcp, void *elem_buf,
 443                         size_t elem_size, void *data)
 444 {
 445         printxvals_ex(*(uint64_t *) elem_buf, NULL, XLAT_STYLE_FMT_U,
 446                       btrfs_tree_objectids, NULL);
 447
 448         return true;
 449 }
 450
 451 static bool
 452 print_btrfs_ioctl_space_info(struct tcb *tcp, void *elem_buf,
 453                              size_t elem_size, void *data)
 454 {
 455         const struct btrfs_ioctl_space_info *info = elem_buf;
 456
 457         PRINT_FIELD_FLAGS("{", *info, flags, btrfs_space_info_flags,
 458                           "BTRFS_SPACE_INFO_???");
 459         PRINT_FIELD_U(", ", *info, total_bytes);
 460         PRINT_FIELD_U(", ", *info, used_bytes);
 461         tprints("}");
 462
 463         return true;
 464 }
 465
 466 static void
 467 print_btrfs_timespec(const char *prefix, uint64_t sec, uint32_t nsec)
 468 {
 469         tprintf("%s{sec=%" PRIu64 ", nsec=%u}", prefix, sec, nsec);
 470         tprints_comment(sprinttime_nsec(sec, nsec));
 471 }
 472
 473 MPERS_PRINTER_DECL(int, btrfs_ioctl,
 474                    struct tcb *const tcp, const unsigned int code,
 475                    const kernel_ulong_t arg)
 476 {
 477         switch (code) {
 478         /* Take no arguments; command only. */
 479         case BTRFS_IOC_TRANS_START:
 480         case BTRFS_IOC_TRANS_END:
 481         case BTRFS_IOC_SYNC:
 482         case BTRFS_IOC_SCRUB_CANCEL:
 483         case BTRFS_IOC_QUOTA_RESCAN_WAIT:
 484         /*
 485          * The codes for these ioctls are based on each accepting a
 486          * vol_args but none of them actually consume an argument.
 487          */
 488         case BTRFS_IOC_DEFRAG:
 489         case BTRFS_IOC_BALANCE:
 490                 break;
 491
 492         /* takes a signed int */
 493         case BTRFS_IOC_BALANCE_CTL:
 494                 tprints(", ");
 495                 printxval(btrfs_balance_ctl_cmds, arg, "BTRFS_BALANCE_CTL_???");
 496                 break;
 497
 498         /* returns a 64 */
 499         case BTRFS_IOC_START_SYNC: /* R */
 500                 if (entering(tcp))
 501                         return 0;
 502         ATTRIBUTE_FALLTHROUGH;
 503         /* takes a u64 */
 504         case BTRFS_IOC_DEFAULT_SUBVOL: /* W */
 505         case BTRFS_IOC_WAIT_SYNC: /* W */
 506                 tprints(", ");
 507                 printnum_int64(tcp, arg, "%" PRIu64);
 508                 break;
 509
 510         /* u64 but describe a flags bitfield; we can make that symbolic */
 511         case BTRFS_IOC_SUBVOL_GETFLAGS: { /* R */
 512                 uint64_t flags;
 513
 514                 if (entering(tcp))
 515                         return 0;
 516
 517                 tprints(", ");
 518
 519                 if (umove_or_printaddr(tcp, arg, &flags))
 520                         break;
 521
 522                 printflags64(btrfs_snap_flags_v2, flags, "BTRFS_SUBVOL_???");
 523                 break;
 524         }
 525
 526         case BTRFS_IOC_SUBVOL_SETFLAGS: { /* W */
 527                 uint64_t flags;
 528
 529                 tprints(", ");
 530
 531                 if (umove_or_printaddr(tcp, arg, &flags))
 532                         break;
 533
 534                 printflags64(btrfs_snap_flags_v2, flags, "BTRFS_SUBVOL_???");
 535                 break;
 536         }
 537
 538         /* More complex types */
 539         case BTRFS_IOC_BALANCE_V2: /* RW */
 540                 if (entering(tcp)) {
 541                         tprints(", ");
 542                         btrfs_print_balance(tcp, arg, false);
 543                         return 0;
 544                 }
 545
 546                 if (syserror(tcp))
 547                         break;
 548
 549                 tprints(" => ");
 550                 btrfs_print_balance(tcp, arg, true);
 551                 break;
 552         case BTRFS_IOC_BALANCE_PROGRESS: /* R */
 553                 if (entering(tcp))
 554                         return 0;
 555
 556                 tprints(", ");
 557                 btrfs_print_balance(tcp, arg, true);
 558                 break;
 559
 560         case BTRFS_IOC_DEFRAG_RANGE: { /* W */
 561                 struct btrfs_ioctl_defrag_range_args args;
 562
 563                 tprints(", ");
 564
 565                 if (umove_or_printaddr(tcp, arg, &args))
 566                         break;
 567
 568                 PRINT_FIELD_U("{", args, start);
 569                 PRINT_FIELD_U64(", ", args, len);
 570
 571                 PRINT_FIELD_FLAGS(", ", args, flags, btrfs_defrag_flags,
 572                                   "BTRFS_DEFRAG_RANGE_???");
 573                 PRINT_FIELD_U(", ", args, extent_thresh);
 574                 PRINT_FIELD_XVAL(", ", args, compress_type,
 575                                  btrfs_compress_types, "BTRFS_COMPRESS_???");
 576                 tprints("}");
 577                 break;
 578         }
 579
 580         case BTRFS_IOC_DEV_INFO: { /* RW */
 581                 struct btrfs_ioctl_dev_info_args args;
 582                 char uuid[UUID_STRING_SIZE+1];
 583                 int valid;
 584
 585                 if (entering(tcp))
 586                         tprints(", ");
 587                 else if (syserror(tcp))
 588                         break;
 589                 else
 590                         tprints(" => ");
 591                 if (umove_or_printaddr(tcp, arg, &args))
 592                         break;
 593
 594                 valid = btrfs_unparse_uuid(args.uuid, uuid);
 595                 if (entering(tcp)) {
 596                         PRINT_FIELD_DEV("{", args, devid);
 597                         if (valid)
 598                                 tprintf(", uuid=%s", uuid);
 599                         tprints("}");
 600                         return 0;
 601                 }
 602
 603                 tprints("{");
 604                 if (valid)
 605                         tprintf("uuid=%s, ", uuid);
 606
 607                 PRINT_FIELD_U("", args, bytes_used);
 608                 PRINT_FIELD_U(", ", args, total_bytes);
 609                 PRINT_FIELD_CSTRING(", ", args, path);
 610                 tprints("}");
 611
 612                 break;
 613         }
 614
 615         case BTRFS_IOC_DEV_REPLACE: { /* RW */
 616                 struct_btrfs_ioctl_dev_replace_args args;
 617
 618                 if (entering(tcp))
 619                         tprints(", ");
 620                 else if (syserror(tcp))
 621                         break;
 622                 else
 623                         tprints(" => ");
 624
 625                 if (umove_or_printaddr(tcp, arg, &args))
 626                         break;
 627
 628                 if (entering(tcp)) {
 629                         PRINT_FIELD_XVAL("{", args, cmd, btrfs_dev_replace_cmds,
 630                                          "BTRFS_IOCTL_DEV_REPLACE_CMD_???");
 631                         if (args.cmd == BTRFS_IOCTL_DEV_REPLACE_CMD_START) {
 632                                 PRINT_FIELD_DEV(", start={", args.start,
 633                                               srcdevid);
 634                                 PRINT_FIELD_XVAL(", ", args.start,
 635                                         cont_reading_from_srcdev_mode,
 636                                         btrfs_cont_reading_from_srcdev_mode,
 637                                         "BTRFS_IOCTL_DEV_REPLACE_CONT_READING"
 638                                         "_FROM_SRCDEV_MODE_???");
 639                                 PRINT_FIELD_CSTRING(", ", args.start,
 640                                                     srcdev_name);
 641                                 PRINT_FIELD_CSTRING(", ", args.start,
 642                                                     tgtdev_name);
 643                                 tprints("}");
 644
 645                         }
 646                         tprints("}");
 647                         return 0;
 648                 }
 649
 650                 PRINT_FIELD_XVAL("{", args, result, btrfs_dev_replace_results,
 651                                  "BTRFS_IOCTL_DEV_REPLACE_RESULT_???");
 652                 if (args.cmd == BTRFS_IOCTL_DEV_REPLACE_CMD_STATUS) {
 653                         PRINT_FIELD_XVAL(", status={", args.status,
 654                                          replace_state, btrfs_dev_replace_state,
 655                                          "BTRFS_IOCTL_DEV_REPLACE_STATE_???");
 656
 657                         PRINT_FIELD_U(", ", args.status, progress_1000);
 658                         if (args.status.progress_1000 <= 1000)
 659                                 tprintf_comment("%u.%u%%",
 660                                         (unsigned) args.status.progress_1000 / 10,
 661                                         (unsigned) args.status.progress_1000 % 10);
 662
 663                         PRINT_FIELD_U(", ", args.status, time_started);
 664                         tprints_comment(sprinttime(args.status.time_started));
 665
 666                         PRINT_FIELD_U(", ", args.status, time_stopped);
 667                         tprints_comment(sprinttime(args.status.time_stopped));
 668
 669                         PRINT_FIELD_U(", ", args.status, num_write_errors);
 670                         PRINT_FIELD_U(", ", args.status,
 671                                       num_uncorrectable_read_errors);
 672                 }
 673                 tprints("}");
 674                 break;
 675         }
 676
 677         case BTRFS_IOC_GET_FEATURES: { /* R */
 678                 struct btrfs_ioctl_feature_flags flags;
 679
 680                 if (entering(tcp))
 681                         return 0;
 682
 683                 tprints(", ");
 684                 if (umove_or_printaddr(tcp, arg, &flags))
 685                         break;
 686
 687                 btrfs_print_features(&flags);
 688                 break;
 689         }
 690
 691         case BTRFS_IOC_SET_FEATURES: { /* W */
 692                 struct btrfs_ioctl_feature_flags flarg[2];
 693
 694                 tprints(", ");
 695
 696                 if (umove_or_printaddr(tcp, arg, &flarg))
 697                         break;
 698
 699                 tprints("[");
 700                 btrfs_print_features(&flarg[0]);
 701                 tprints(", ");
 702                 btrfs_print_features(&flarg[1]);
 703                 tprints("]");
 704                 break;
 705         }
 706
 707         case BTRFS_IOC_GET_SUPPORTED_FEATURES: { /* R */
 708                 struct btrfs_ioctl_feature_flags flarg[3];
 709
 710                 if (entering(tcp))
 711                         return 0;
 712
 713                 tprints(", ");
 714                 if (umove_or_printaddr(tcp, arg, &flarg))
 715                         break;
 716
 717                 tprints("[");
 718                 btrfs_print_features(&flarg[0]);
 719                 tprints_comment("supported");
 720
 721                 tprints(", ");
 722                 btrfs_print_features(&flarg[1]);
 723                 tprints_comment("safe to set");
 724
 725                 tprints(", ");
 726                 btrfs_print_features(&flarg[2]);
 727                 tprints_comment("safe to clear");
 728                 tprints("]");
 729
 730                 break;
 731         }
 732
 733         case BTRFS_IOC_FS_INFO: { /* R */
 734                 struct btrfs_ioctl_fs_info_args args;
 735                 char uuid[UUID_STRING_SIZE+1];
 736                 uint32_t nodesize, sectorsize, clone_alignment;
 737 #ifndef HAVE_STRUCT_BTRFS_IOCTL_FS_INFO_ARGS_NODESIZE
 738                 uint32_t *reserved32;
 739 #endif
 740
 741                 if (entering(tcp))
 742                         return 0;
 743
 744                 tprints(", ");
 745                 if (umove_or_printaddr(tcp, arg, &args))
 746                         break;
 747
 748 #ifdef HAVE_STRUCT_BTRFS_IOCTL_FS_INFO_ARGS_NODESIZE
 749                 nodesize = args.nodesize,
 750                 sectorsize = args.sectorsize,
 751                 clone_alignment = args.clone_alignment;
 752 #else
 753                 reserved32 = (void *) args.reserved;
 754                 nodesize = reserved32[0];
 755                 sectorsize = reserved32[1];
 756                 clone_alignment = reserved32[2];
 757 #endif
 758                 btrfs_unparse_uuid(args.fsid, uuid);
 759
 760                 PRINT_FIELD_U("{", args, max_id);
 761                 PRINT_FIELD_U(", ", args, num_devices);
 762                 tprintf(", fsid=%s, nodesize=%u, sectorsize=%u"
 763                         ", clone_alignment=%u",
 764                         uuid, nodesize, sectorsize, clone_alignment);
 765                 tprints("}");
 766                 break;
 767         }
 768
 769         case BTRFS_IOC_GET_DEV_STATS: { /* RW */
 770                 struct btrfs_ioctl_get_dev_stats args;
 771                 uint64_t i;
 772
 773                 if (entering(tcp))
 774                         tprints(", ");
 775                 else if (syserror(tcp))
 776                         break;
 777                 else
 778                         tprints(" => ");
 779                 if (umove_or_printaddr(tcp, arg, &args))
 780                         break;
 781
 782                 tprints("{");
 783
 784                 if (entering(tcp)) {
 785                         PRINT_FIELD_DEV("", args, devid);
 786                         tprints(", ");
 787                 }
 788
 789                 PRINT_FIELD_U("", args, nr_items);
 790                 PRINT_FIELD_FLAGS(", ", args, flags, btrfs_dev_stats_flags,
 791                                   "BTRFS_DEV_STATS_???");
 792
 793                 if (entering(tcp)) {
 794                         tprints("}");
 795                         return 0;
 796                 }
 797
 798                 /*
 799                  * The structure has a 1k limit; Let's make sure we don't
 800                  * go off into the middle of nowhere with a bad nr_items
 801                  * value.
 802                  */
 803                 tprints(", [");
 804                 for (i = 0; i < args.nr_items; i++) {
 805                         if (i)
 806                                 tprints(", ");
 807                         if (i >= ARRAY_SIZE(args.values)) {
 808                                 tprints("...");
 809                                 break;
 810                         }
 811
 812                         tprints("[");
 813                         printxval_u(btrfs_dev_stats_values, i, NULL);
 814                         tprintf("] = %" PRI__u64, args.values[i]);
 815                 }
 816                 tprints("]}");
 817                 break;
 818         }
 819
 820         case BTRFS_IOC_INO_LOOKUP: { /* RW */
 821                 struct btrfs_ioctl_ino_lookup_args args;
 822
 823                 if (entering(tcp))
 824                         tprints(", ");
 825                 else if (syserror(tcp))
 826                         break;
 827                 else
 828                         tprints(" => ");
 829
 830                 if (umove_or_printaddr(tcp, arg, &args))
 831                         break;
 832
 833                 if (entering(tcp)) {
 834                         /* Use subvolume id of the containing root */
 835                         if (args.treeid == 0)
 836                                 set_tcb_priv_ulong(tcp, 1);
 837
 838                         btrfs_print_objectid("{", args, treeid);
 839                         btrfs_print_objectid(", ", args, objectid);
 840                         tprints("}");
 841                         return 0;
 842                 }
 843
 844                 tprints("{");
 845                 if (get_tcb_priv_ulong(tcp)) {
 846                         btrfs_print_objectid("", args, treeid);
 847                         tprints(", ");
 848                 }
 849
 850                 PRINT_FIELD_CSTRING("", args, name);
 851                 tprints("}");
 852                 break;
 853         }
 854
 855         case BTRFS_IOC_INO_PATHS: { /* RW */
 856                 struct btrfs_ioctl_ino_path_args args;
 857
 858                 if (entering(tcp))
 859                         tprints(", ");
 860                 else if (syserror(tcp))
 861                         break;
 862                 else
 863                         tprints(" => ");
 864
 865                 if (umove_or_printaddr(tcp, arg, &args))
 866                         break;
 867
 868                 if (entering(tcp)) {
 869                         PRINT_FIELD_U("{", args, inum);
 870                         PRINT_FIELD_U(", ", args, size);
 871                         PRINT_FIELD_ADDR64(", ", args, fspath);
 872                         tprints("}");
 873                         return 0;
 874                 }
 875
 876                 tprints("{fspath=");
 877                 btrfs_print_ino_path_container(tcp, args.fspath);
 878
 879                 tprints("}");
 880                 break;
 881         }
 882
 883         case BTRFS_IOC_LOGICAL_INO: { /* RW */
 884                 struct btrfs_ioctl_logical_ino_args args;
 885
 886                 if (entering(tcp))
 887                         tprints(", ");
 888                 else if (syserror(tcp))
 889                         break;
 890                 else
 891                         tprints(" => ");
 892
 893                 if (umove_or_printaddr(tcp, arg, &args))
 894                         break;
 895
 896                 if (entering(tcp)) {
 897                         PRINT_FIELD_U("{", args, logical);
 898                         PRINT_FIELD_U(", ", args, size);
 899
 900                         if (!IS_ARRAY_ZERO(args.reserved)) {
 901                                 tprints(", reserved=[");
 902                                 for (size_t i = 0; i < 3; ++i)
 903                                         tprintf("%s%#" PRI__x64,
 904                                                 i ? ", " : "",
 905                                                 args.reserved[i]);
 906                                 tprints("]");
 907                         }
 908
 909                         tprintf(", flags=");
 910                         printflags64(btrfs_logical_ino_args_flags,
 911 #ifdef HAVE_STRUCT_BTRFS_IOCTL_LOGICAL_INO_ARGS_FLAGS
 912                                      args.flags
 913 #else
 914                                      args.reserved[3]
 915 #endif
 916                                      , "BTRFS_LOGICAL_INO_ARGS_???");
 917                         PRINT_FIELD_ADDR64(", ", args, inodes);
 918                         tprints("}");
 919                         return 0;
 920                 }
 921
 922                 tprints("{inodes=");
 923                 btrfs_print_logical_ino_container(tcp, args.inodes);
 924
 925                 tprints("}");
 926                 break;
 927         }
 928
 929         case BTRFS_IOC_QGROUP_ASSIGN: { /* W */
 930                 struct btrfs_ioctl_qgroup_assign_args args;
 931
 932                 tprints(", ");
 933                 if (umove_or_printaddr(tcp, arg, &args))
 934                         break;
 935
 936                 PRINT_FIELD_U("{", args, assign);
 937                 PRINT_FIELD_U(", ", args, src);
 938                 PRINT_FIELD_U(", ", args, dst);
 939                 tprints("}");
 940                 break;
 941         }
 942
 943         case BTRFS_IOC_QGROUP_CREATE: { /* W */
 944                 struct btrfs_ioctl_qgroup_create_args args;
 945
 946                 tprints(", ");
 947                 if (umove_or_printaddr(tcp, arg, &args))
 948                         break;
 949
 950                 PRINT_FIELD_U("{", args, create);
 951                 PRINT_FIELD_U(", ", args, qgroupid);
 952                 tprints("}");
 953                 break;
 954         }
 955
 956         case BTRFS_IOC_QGROUP_LIMIT: { /* R */
 957                 struct btrfs_ioctl_qgroup_limit_args args;
 958
 959                 if (entering(tcp))
 960                         return 0;
 961
 962                 tprints(", ");
 963                 if (umove_or_printaddr(tcp, arg, &args))
 964                         break;
 965
 966                 PRINT_FIELD_U("{", args, qgroupid);
 967                 btrfs_print_qgroup_limit(&args.lim);
 968                 tprints("}");
 969                 break;
 970         }
 971
 972         case BTRFS_IOC_QUOTA_CTL: { /* W */
 973                 struct btrfs_ioctl_quota_ctl_args args;
 974
 975                 tprints(", ");
 976                 if (umove_or_printaddr(tcp, arg, &args))
 977                         break;
 978
 979                 PRINT_FIELD_XVAL("{", args, cmd, btrfs_qgroup_ctl_cmds,
 980                                  "BTRFS_QUOTA_CTL_???");
 981                 tprints("}");
 982
 983                 break;
 984         }
 985
 986         case BTRFS_IOC_QUOTA_RESCAN: { /* W */
 987                 struct btrfs_ioctl_quota_rescan_args args;
 988
 989                 tprints(", ");
 990                 if (umove_or_printaddr(tcp, arg, &args))
 991                         break;
 992
 993                 PRINT_FIELD_U("{", args, flags);
 994                 tprints("}");
 995                 break;
 996         }
 997
 998         case BTRFS_IOC_QUOTA_RESCAN_STATUS: { /* R */
 999                 struct btrfs_ioctl_quota_rescan_args args;
1000
1001                 if (entering(tcp))
1002                         return 0;
1003
1004                 tprints(", ");
1005                 if (umove_or_printaddr(tcp, arg, &args))
1006                         break;
1007
1008                 PRINT_FIELD_U("{", args, flags);
1009                 btrfs_print_objectid(", ", args, progress);
1010                 tprints("}");
1011                 break;
1012         }
1013
1014         case BTRFS_IOC_SET_RECEIVED_SUBVOL: { /* RW */
1015                 struct_btrfs_ioctl_received_subvol_args args;
1016                 char uuid[UUID_STRING_SIZE+1];
1017
1018                 if (entering(tcp))
1019                         tprints(", ");
1020                 else if (syserror(tcp))
1021                         break;
1022                 else
1023                         tprints(" => ");
1024
1025                 if (umove_or_printaddr(tcp, arg, &args))
1026                         break;
1027
1028                 if (entering(tcp)) {
1029                         btrfs_unparse_uuid((unsigned char *)args.uuid, uuid);
1030                         tprintf("{uuid=%s", uuid);
1031                         PRINT_FIELD_U(", ", args, stransid);
1032                         print_btrfs_timespec(", stime=",
1033                                              args.stime.sec, args.stime.nsec);
1034                         PRINT_FIELD_U(", ", args, flags);
1035                         tprints("}");
1036                         return 0;
1037                 }
1038                 PRINT_FIELD_U("{", args, rtransid);
1039                 print_btrfs_timespec(", rtime=",
1040                                      args.rtime.sec, args.rtime.nsec);
1041                 tprints("}");
1042                 break;
1043         }
1044
1045         case BTRFS_IOC_SCRUB: /* RW */
1046         case BTRFS_IOC_SCRUB_PROGRESS: { /* RW */
1047                 struct btrfs_ioctl_scrub_args args;
1048
1049                 if (entering(tcp))
1050                         tprints(", ");
1051                 else if (syserror(tcp))
1052                         break;
1053                 else
1054                         tprints(" => ");
1055
1056                 if (umove_or_printaddr(tcp, arg, &args))
1057                         break;
1058
1059                 if (entering(tcp)) {
1060                         PRINT_FIELD_DEV("{", args, devid);
1061                         if (code == BTRFS_IOC_SCRUB) {
1062                                 PRINT_FIELD_U(", ", args, start);
1063                                 PRINT_FIELD_U64(", ", args, end);
1064                                 PRINT_FIELD_FLAGS(", ", args, flags,
1065                                                   btrfs_scrub_flags,
1066                                                   "BTRFS_SCRUB_???");
1067                         }
1068                         tprints("}");
1069                         return 0;
1070                 }
1071                 PRINT_FIELD_U("{progress={", args.progress,
1072                               data_extents_scrubbed);
1073                 PRINT_FIELD_U(", ", args.progress, tree_extents_scrubbed);
1074                 PRINT_FIELD_U(", ", args.progress, data_bytes_scrubbed);
1075                 PRINT_FIELD_U(", ", args.progress, tree_bytes_scrubbed);
1076                 PRINT_FIELD_U(", ", args.progress, read_errors);
1077                 PRINT_FIELD_U(", ", args.progress, csum_errors);
1078                 PRINT_FIELD_U(", ", args.progress, verify_errors);
1079                 PRINT_FIELD_U(", ", args.progress, no_csum);
1080                 PRINT_FIELD_U(", ", args.progress, csum_discards);
1081                 PRINT_FIELD_U(", ", args.progress, super_errors);
1082                 PRINT_FIELD_U(", ", args.progress, malloc_errors);
1083                 PRINT_FIELD_U(", ", args.progress, uncorrectable_errors);
1084                 PRINT_FIELD_U(", ", args.progress, corrected_errors);
1085                 PRINT_FIELD_U(", ", args.progress, last_physical);
1086                 PRINT_FIELD_U(", ", args.progress, unverified_errors);
1087                 tprints("}}");
1088                 break;
1089         }
1090
1091         case BTRFS_IOC_TREE_SEARCH: { /* RW */
1092                 struct btrfs_ioctl_search_args args;
1093                 uint64_t buf_offset;
1094
1095                 if (entering(tcp))
1096                         tprints(", ");
1097                 else if (syserror(tcp))
1098                         break;
1099                 else
1100                         tprints(" => ");
1101
1102                 if (umove_or_printaddr(tcp, arg, &args))
1103                         break;
1104
1105                 buf_offset = offsetof(struct btrfs_ioctl_search_args, buf);
1106                 btrfs_print_tree_search(tcp, &args.key, arg + buf_offset,
1107                                         sizeof(args.buf), false);
1108                 if (entering(tcp))
1109                         return 0;
1110                 break;
1111         }
1112
1113         case BTRFS_IOC_TREE_SEARCH_V2: { /* RW */
1114                 struct btrfs_ioctl_search_args_v2 args;
1115                 uint64_t buf_offset;
1116
1117                 if (entering(tcp))
1118                         tprints(", ");
1119                 else if (syserror(tcp)) {
1120                         if (tcp->u_error == EOVERFLOW) {
1121                                 tprints(" => ");
1122                                 if (!umove_or_printaddr_ignore_syserror(tcp,
1123                                     arg, &args)) {
1124                                         PRINT_FIELD_U("{", args, buf_size);
1125                                         tprints("}");
1126                                 }
1127                         }
1128                         break;
1129                 } else
1130                         tprints(" => ");
1131
1132                 if (umove_or_printaddr(tcp, arg, &args))
1133                         break;
1134
1135                 buf_offset = offsetof(struct btrfs_ioctl_search_args_v2, buf);
1136                 btrfs_print_tree_search(tcp, &args.key, arg + buf_offset,
1137                                         args.buf_size, true);
1138                 if (entering(tcp))
1139                         return 0;
1140                 break;
1141         }
1142
1143         case BTRFS_IOC_SEND: { /* W */
1144                 struct_btrfs_ioctl_send_args args;
1145
1146                 tprints(", ");
1147                 if (umove_or_printaddr(tcp, arg, &args))
1148                         break;
1149
1150                 PRINT_FIELD_FD("{", args, send_fd, tcp);
1151                 PRINT_FIELD_U(", ", args, clone_sources_count);
1152
1153                 tprints(", clone_sources=");
1154                 if (abbrev(tcp))
1155                         printaddr((uintptr_t) args.clone_sources);
1156                 else {
1157                         uint64_t record;
1158                         print_array(tcp, ptr_to_kulong(args.clone_sources),
1159                                     args.clone_sources_count,
1160                                     &record, sizeof(record),
1161                                     tfetch_mem,
1162                                     print_objectid_callback, 0);
1163                 }
1164                 btrfs_print_objectid(", ", args, parent_root);
1165                 PRINT_FIELD_FLAGS(", ", args, flags, btrfs_send_flags,
1166                                   "BTRFS_SEND_FLAGS_???");
1167                 tprints("}");
1168                 break;
1169         }
1170
1171         case BTRFS_IOC_SPACE_INFO: { /* RW */
1172                 struct btrfs_ioctl_space_args args;
1173
1174                 if (entering(tcp))
1175                         tprints(", ");
1176                 else if (syserror(tcp))
1177                         break;
1178                 else
1179                         tprints(" => ");
1180
1181                 if (umove_or_printaddr(tcp, arg, &args))
1182                         break;
1183
1184                 if (entering(tcp)) {
1185                         PRINT_FIELD_U("{", args, space_slots);
1186                         tprints("}");
1187                         return 0;
1188                 }
1189
1190                 PRINT_FIELD_U("{", args, total_spaces);
1191
1192                 if (args.space_slots == 0 && args.total_spaces) {
1193                         tprints("}");
1194                         break;
1195                 }
1196
1197                 if (abbrev(tcp)) {
1198                         tprints(", ...");
1199                 } else {
1200                         struct btrfs_ioctl_space_info info;
1201                         tprints(", spaces=");
1202                         print_array(tcp, arg + offsetof(typeof(args), spaces),
1203                                     args.total_spaces,
1204                                     &info, sizeof(info), tfetch_mem,
1205                                     print_btrfs_ioctl_space_info, 0);
1206                 }
1207                 tprints("}");
1208                 break;
1209         }
1210
1211         case BTRFS_IOC_SNAP_CREATE:
1212         case BTRFS_IOC_RESIZE:
1213         case BTRFS_IOC_SCAN_DEV:
1214         case BTRFS_IOC_ADD_DEV:
1215         case BTRFS_IOC_RM_DEV:
1216         case BTRFS_IOC_SUBVOL_CREATE:
1217         case BTRFS_IOC_SNAP_DESTROY:
1218         case BTRFS_IOC_DEVICES_READY: { /* W */
1219                 struct btrfs_ioctl_vol_args args;
1220
1221                 tprints(", ");
1222                 if (umove_or_printaddr(tcp, arg, &args))
1223                         break;
1224
1225                 PRINT_FIELD_FD("{", args, fd, tcp);
1226                 PRINT_FIELD_CSTRING(", ", args, name);
1227                 tprints("}");
1228                 break;
1229         }
1230
1231         case BTRFS_IOC_SNAP_CREATE_V2:
1232         case BTRFS_IOC_SUBVOL_CREATE_V2: { /* code is W, but is actually RW */
1233                 struct_btrfs_ioctl_vol_args_v2 args;
1234
1235                 if (entering(tcp))
1236                         tprints(", ");
1237                 else if (syserror(tcp))
1238                         break;
1239                 else
1240                         tprints(" => ");
1241
1242                 if (umove_or_printaddr(tcp, arg, &args))
1243                         break;
1244
1245                 if (entering(tcp)) {
1246                         PRINT_FIELD_FD("{", args, fd, tcp);
1247                         PRINT_FIELD_FLAGS(", ", args, flags,
1248                                           btrfs_snap_flags_v2,
1249                                           "BTRFS_SUBVOL_???");
1250                         if (args.flags & BTRFS_SUBVOL_QGROUP_INHERIT) {
1251                                 PRINT_FIELD_U(", ", args, size);
1252                                 tprints(", qgroup_inherit=");
1253                                 btrfs_print_qgroup_inherit(tcp,
1254                                         ptr_to_kulong(args.qgroup_inherit));
1255                         }
1256                         PRINT_FIELD_CSTRING(", ", args, name);
1257                         tprints("}");
1258                         return 0;
1259                 }
1260                 PRINT_FIELD_U("{", args, transid);
1261                 tprints("}");
1262                 break;
1263         }
1264
1265         case BTRFS_IOC_GET_FSLABEL: /* R */
1266                 if (entering(tcp))
1267                         return 0;
1268                 ATTRIBUTE_FALLTHROUGH;
1269         case BTRFS_IOC_SET_FSLABEL: { /* W */
1270                 char label[BTRFS_LABEL_SIZE];
1271
1272                 tprints(", ");
1273                 if (umove_or_printaddr(tcp, arg, &label))
1274                         break;
1275                 print_quoted_cstring(label, sizeof(label));
1276                 break;
1277         }
1278
1279         case BTRFS_IOC_CLONE:                   /* FICLONE */
1280         case BTRFS_IOC_CLONE_RANGE:             /* FICLONERANGE */
1281 #ifdef BTRFS_IOC_FILE_EXTENT_SAME
1282         case BTRFS_IOC_FILE_EXTENT_SAME:        /* FIDEDUPERANGE */
1283 #endif
1284                 /*
1285                  * FICLONE, FICLONERANGE, and FIDEDUPERANGE started out as
1286                  * btrfs ioctls and the code was kept for the generic
1287                  * implementations.  We use the BTRFS_* names here because
1288                  * they will be available on older systems.
1289                  */
1290                 return file_ioctl(tcp, code, arg);
1291
1292         default:
1293                 return RVAL_DECODED;
1294         };
1295         return RVAL_IOCTL_DECODED;
1296 }
1297 #endif /* HAVE_LINUX_BTRFS_H */