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

   1 /*
   2  * Copyright (c) 2016 Jeff Mahoney <jeffm@suse.com>
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. The name of the author may not be used to endorse or promote products
  14  *    derived from this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  21  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  22  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  23  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  25  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26  */
  27
  28 #include "defs.h"
  29
  30 #ifdef HAVE_LINUX_BTRFS_H
  31
  32 #include DEF_MPERS_TYPE(struct_btrfs_ioctl_dev_replace_args)
  33 #include DEF_MPERS_TYPE(struct_btrfs_ioctl_send_args)
  34 #include DEF_MPERS_TYPE(struct_btrfs_ioctl_received_subvol_args)
  35
  36 # include <linux/btrfs.h>
  37
  38 typedef struct btrfs_ioctl_dev_replace_args
  39         struct_btrfs_ioctl_dev_replace_args;
  40 typedef struct btrfs_ioctl_send_args
  41         struct_btrfs_ioctl_send_args;
  42 typedef struct btrfs_ioctl_received_subvol_args
  43         struct_btrfs_ioctl_received_subvol_args;
  44
  45 #endif /* HAVE_LINUX_BTRFS_H */
  46
  47 #include MPERS_DEFS
  48
  49 #ifdef HAVE_LINUX_BTRFS_H
  50
  51 #include <linux/fs.h>
  52
  53 /*
  54  * Prior to Linux 3.12, the BTRFS_IOC_DEFAULT_SUBVOL used u64 in
  55  * its definition, which isn't exported by the kernel.
  56  */
  57 typedef __u64 u64;
  58
  59 #ifndef HAVE_STRUCT_BTRFS_IOCTL_FEATURE_FLAGS_COMPAT_FLAGS
  60 struct btrfs_ioctl_feature_flags {
  61         uint64_t compat_flags;
  62         uint64_t compat_ro_flags;
  63         uint64_t incompat_flags;
  64 };
  65 #endif
  66
  67 #ifndef HAVE_STRUCT_BTRFS_IOCTL_DEFRAG_RANGE_ARGS_START
  68 struct btrfs_ioctl_defrag_range_args {
  69         uint64_t start;
  70         uint64_t len;
  71         uint64_t flags;
  72         uint32_t extent_thresh;
  73         uint32_t compress_type;
  74         uint32_t unused[4];
  75 };
  76 #endif
  77
  78 #ifndef BTRFS_LABEL_SIZE
  79 # define BTRFS_LABEL_SIZE 256
  80 #endif
  81
  82 #ifndef BTRFS_FIRST_FREE_OBJECTID
  83 # define BTRFS_FIRST_FREE_OBJECTID 256ULL
  84 #endif
  85
  86 #ifndef BTRFS_IOC_GET_FEATURES
  87 # define BTRFS_IOC_GET_FEATURES _IOR(BTRFS_IOCTL_MAGIC, 57, \
  88                                         struct btrfs_ioctl_feature_flags)
  89 # define BTRFS_IOC_SET_FEATURES _IOW(BTRFS_IOCTL_MAGIC, 57, \
  90                                         struct btrfs_ioctl_feature_flags[2])
  91 # define BTRFS_IOC_GET_SUPPORTED_FEATURES _IOR(BTRFS_IOCTL_MAGIC, 57, \
  92                                         struct btrfs_ioctl_feature_flags[3])
  93 #endif
  94
  95 #ifndef BTRFS_IOC_TREE_SEARCH_V2
  96 # define BTRFS_IOC_TREE_SEARCH_V2 _IOWR(BTRFS_IOCTL_MAGIC, 17, \
  97                                         struct btrfs_ioctl_search_args_v2)
  98 struct btrfs_ioctl_search_args_v2 {
  99         struct btrfs_ioctl_search_key key; /* in/out - search parameters */
 100         uint64_t buf_size;                 /* in - size of buffer
 101                                             * out - on EOVERFLOW: needed size
 102                                             *       to store item */
 103         uint64_t buf[0];                   /* out - found items */
 104 };
 105 #endif
 106
 107 #include "xlat/btrfs_balance_args.h"
 108 #include "xlat/btrfs_balance_ctl_cmds.h"
 109 #include "xlat/btrfs_balance_flags.h"
 110 #include "xlat/btrfs_balance_state.h"
 111 #include "xlat/btrfs_compress_types.h"
 112 #include "xlat/btrfs_defrag_flags.h"
 113 #include "xlat/btrfs_dev_replace_cmds.h"
 114 #include "xlat/btrfs_dev_replace_results.h"
 115 #include "xlat/btrfs_dev_replace_state.h"
 116 #include "xlat/btrfs_dev_stats_flags.h"
 117 #include "xlat/btrfs_dev_stats_values.h"
 118 #include "xlat/btrfs_features_compat.h"
 119 #include "xlat/btrfs_features_compat_ro.h"
 120 #include "xlat/btrfs_features_incompat.h"
 121 #include "xlat/btrfs_key_types.h"
 122 #include "xlat/btrfs_qgroup_ctl_cmds.h"
 123 #include "xlat/btrfs_qgroup_inherit_flags.h"
 124 #include "xlat/btrfs_qgroup_limit_flags.h"
 125 #include "xlat/btrfs_qgroup_status_flags.h"
 126 #include "xlat/btrfs_scrub_flags.h"
 127 #include "xlat/btrfs_send_flags.h"
 128 #include "xlat/btrfs_snap_flags_v2.h"
 129 #include "xlat/btrfs_space_info_flags.h"
 130 #include "xlat/btrfs_tree_objectids.h"
 131
 132 static inline char
 133 prnibble(char v)
 134 {
 135         if (v >= 10)
 136                 return 'a' + (v - 10);
 137         return '0' + v;
 138 }
 139
 140 /* 8-4-4-4-12 = 36 characters */
 141 #define UUID_STRING_SIZE 36
 142
 143 /* Formats uuid, returns 0 if it's all zeroes */
 144 static int
 145 btrfs_unparse_uuid(unsigned char *uuid, char *out)
 146 {
 147         int i;
 148         int ret = 0;
 149         for (i = 0; i < BTRFS_UUID_SIZE; i++) {
 150                 if (i == 4 || i == 6 || i == 8 || i == 10)
 151                         *out++ = '-';
 152                 *out++ = prnibble(uuid[i] >> 4);
 153                 *out++ = prnibble(uuid[i] & 0xf);
 154                 if (uuid[i])
 155                         ret = 1;
 156         }
 157         *out = '\0';
 158         return ret;
 159 }
 160
 161 static void
 162 print_u64(const char *name, uint64_t value)
 163 {
 164         tprintf(", %s=%" PRIu64, name, value);
 165         if (value == UINT64_MAX)
 166                 tprints(" /* UINT64_MAX */");
 167 }
 168
 169 #define print_member_u64(obj, name) print_u64(#name, obj->name)
 170
 171 static void
 172 btrfs_print_balance_args(const char *name, const struct btrfs_balance_args *bba)
 173 {
 174         tprintf(", %s={profiles=", name);
 175         printflags64(btrfs_space_info_flags, bba->profiles,
 176                      "BTRFS_BLOCK_GROUP_???");
 177         print_member_u64(bba, usage);
 178         print_member_u64(bba, devid);
 179         print_member_u64(bba, pstart);
 180         print_member_u64(bba, pend);
 181         print_member_u64(bba, vstart);
 182         print_member_u64(bba, vend);
 183         print_member_u64(bba, target);
 184         tprints(", flags=");
 185         printflags64(btrfs_balance_args, bba->flags, "BTRFS_BALANCE_ARGS_???");
 186         tprints("}");
 187 }
 188
 189 static void
 190 btrfs_print_balance(struct tcb *tcp, const long arg, bool out)
 191 {
 192         struct btrfs_ioctl_balance_args balance_args;
 193
 194         if (umove_or_printaddr(tcp, arg, &balance_args))
 195                 return;
 196
 197         tprints("{flags=");
 198         printflags64(btrfs_balance_flags, balance_args.flags,
 199                      "BTRFS_BALANCE_???");
 200         if (out) {
 201                 tprints(", state=");
 202                 printflags64(btrfs_balance_state, balance_args.state,
 203                              "BTRFS_BALANCE_STATE_???");
 204         }
 205
 206         if (balance_args.flags & BTRFS_BALANCE_DATA)
 207                 btrfs_print_balance_args("data", &balance_args.data);
 208         if (balance_args.flags & BTRFS_BALANCE_METADATA)
 209                 btrfs_print_balance_args("meta", &balance_args.meta);
 210         if (balance_args.flags & BTRFS_BALANCE_SYSTEM)
 211                 btrfs_print_balance_args("sys", &balance_args.sys);
 212         tprints("}");
 213 }
 214
 215 static void
 216 btrfs_print_features(const struct btrfs_ioctl_feature_flags *flags)
 217 {
 218         tprints("{compat_flags=");
 219         printflags64(btrfs_features_compat, flags->compat_flags,
 220                      "BTRFS_FEATURE_COMPAT_???");
 221
 222         tprints(", compat_ro_flags=");
 223         printflags64(btrfs_features_compat_ro, flags->compat_ro_flags,
 224                      "BTRFS_FEATURE_COMPAT_RO_???");
 225
 226         tprints(", incompat_flags=");
 227         printflags64(btrfs_features_incompat, flags->incompat_flags,
 228                      "BTRFS_FEATURE_INCOMPAT_???");
 229         tprints("}");
 230 }
 231
 232 static void
 233 btrfs_print_qgroup_limit(const struct btrfs_qgroup_limit *lim)
 234 {
 235         tprints("{flags=");
 236         printflags64(btrfs_qgroup_limit_flags, lim->flags,
 237                      "BTRFS_QGROUP_LIMIT_???");
 238         tprintf(", max_rfer=%" PRI__u64 ", max_excl=%" PRI__u64
 239                 ", rsv_rfer=%" PRI__u64 ", rsv_excl=%" PRI__u64 "}",
 240                 lim->max_rfer, lim->max_excl,
 241                 lim->rsv_rfer, lim->rsv_excl);
 242 }
 243
 244 static void
 245 btrfs_print_key_type(uint32_t type)
 246 {
 247         const char *str = xlookup(btrfs_key_types, type);
 248         tprintf("%u", type);
 249         if (str)
 250                 tprintf(" /* %s */", str);
 251 }
 252
 253 static void
 254 btrfs_print_objectid(uint64_t objectid)
 255 {
 256         const char *str = xlookup(btrfs_tree_objectids, objectid);
 257         tprintf("%" PRIu64, objectid);
 258         if (str)
 259                 tprintf(" /* %s */", str);
 260 }
 261
 262 static void
 263 btrfs_print_data_container_header(const struct btrfs_data_container *container)
 264 {
 265         tprintf("{bytes_left=%u, bytes_missing=%u"
 266                 ", elem_cnt=%u, elem_missed=%u, val=",
 267                 container->bytes_left, container->bytes_missing,
 268                 container->elem_cnt, container->elem_missed);
 269 }
 270
 271 static void
 272 btrfs_print_data_container_footer(void)
 273 {
 274         tprints("}");
 275 }
 276
 277 static bool
 278 print_btrfs_data_container_logical_ino(struct tcb *tcp, void *elem_buf,
 279                                        size_t elem_size, void *data)
 280 {
 281         const uint64_t *const record = elem_buf;
 282
 283         tprintf("{inum=%" PRIu64 ", offset=%" PRIu64 ", root=%" PRIu64 "}",
 284                 record[0], record[1], record[2]);
 285
 286         return true;
 287 }
 288
 289 static void
 290 btrfs_print_logical_ino_container(struct tcb *tcp,
 291                                   const uint64_t inodes_addr)
 292 {
 293         struct btrfs_data_container container;
 294
 295         if (umove_or_printaddr(tcp, inodes_addr, &container))
 296                 return;
 297
 298         btrfs_print_data_container_header(&container);
 299
 300         if (abbrev(tcp)) {
 301                 tprints("...");
 302         } else {
 303                 const uint64_t val_addr =
 304                         inodes_addr + offsetof(typeof(container), val);
 305                 uint64_t record[3];
 306                 print_array(tcp, val_addr, container.elem_cnt,
 307                             record, sizeof(record),
 308                             umoven_or_printaddr,
 309                             print_btrfs_data_container_logical_ino, 0);
 310         }
 311
 312         btrfs_print_data_container_footer();
 313 }
 314
 315 static bool
 316 print_btrfs_data_container_ino_path(struct tcb *tcp, void *elem_buf,
 317                                        size_t elem_size, void *data)
 318 {
 319         const uint64_t *const offset = elem_buf;
 320         const uint64_t *const val_addr = data;
 321
 322         printpath(tcp, *val_addr + *offset);
 323
 324         return true;
 325 }
 326
 327 static void
 328 btrfs_print_ino_path_container(struct tcb *tcp,
 329                                const uint64_t fspath_addr)
 330 {
 331         struct btrfs_data_container container;
 332
 333         if (umove_or_printaddr(tcp, fspath_addr, &container))
 334                 return;
 335
 336         btrfs_print_data_container_header(&container);
 337
 338         if (abbrev(tcp)) {
 339                 tprints("...");
 340         } else {
 341                 uint64_t val_addr =
 342                         fspath_addr + offsetof(typeof(container), val);
 343                 uint64_t offset;
 344                 print_array(tcp, val_addr, container.elem_cnt,
 345                             &offset, sizeof(offset),
 346                             umoven_or_printaddr,
 347                             print_btrfs_data_container_ino_path, &val_addr);
 348         }
 349
 350         btrfs_print_data_container_footer();
 351 }
 352
 353 static bool
 354 print_uint64(struct tcb *tcp, void *elem_buf, size_t elem_size, void *data)
 355 {
 356         tprintf("%" PRIu64, * (uint64_t *) elem_buf);
 357
 358         return true;
 359 }
 360
 361 static void
 362 btrfs_print_qgroup_inherit(struct tcb *tcp, const uint64_t qgi_addr)
 363 {
 364         struct btrfs_qgroup_inherit inherit;
 365
 366         if (umove_or_printaddr(tcp, qgi_addr, &inherit))
 367                 return;
 368
 369         tprintf("{flags=");
 370         printflags64(btrfs_qgroup_inherit_flags, inherit.flags,
 371                      "BTRFS_QGROUP_INHERIT_???");
 372         tprintf(", num_qgroups=%" PRI__u64 ", num_ref_copies=%" PRI__u64
 373                 ", num_excl_copies=%" PRI__u64 ", lim=",
 374                 inherit.num_qgroups, inherit.num_ref_copies,
 375                 inherit.num_excl_copies);
 376
 377         btrfs_print_qgroup_limit(&inherit.lim);
 378
 379         tprints(", qgroups=");
 380
 381         if (abbrev(tcp)) {
 382                 tprints("...");
 383         } else {
 384                 uint64_t record;
 385                 print_array(tcp, qgi_addr + offsetof(typeof(inherit), qgroups),
 386                             inherit.num_qgroups, &record, sizeof(record),
 387                             umoven_or_printaddr, print_uint64, 0);
 388         }
 389         tprints("}");
 390 }
 391
 392 static void
 393 print_key_value_internal(struct tcb *tcp, const char *name, uint64_t value)
 394 {
 395         if (value) {
 396                 tprintf(", %s=%" PRIu64, name, value);
 397                 if (value == UINT64_MAX)
 398                         tprints(" /* UINT64_MAX */");
 399         }
 400 }
 401 #define print_key_value(tcp, key, name)                                 \
 402         print_key_value_internal((tcp), #name, (key)->name)
 403
 404 static bool
 405 print_btrfs_ioctl_search_header(struct tcb *tcp, void *elem_buf,
 406                                 size_t elem_size, void *data)
 407 {
 408         const struct btrfs_ioctl_search_header *sh = elem_buf;
 409
 410         tprintf("{transid=%" PRI__u64 ", objectid=", sh->transid);
 411         btrfs_print_objectid(sh->objectid);
 412         tprintf(", offset=%" PRI__u64 ", type=", sh->offset);
 413         btrfs_print_key_type(sh->type);
 414         tprintf(", len=%u}", sh->len);
 415
 416         return true;
 417 }
 418
 419 static void
 420 btrfs_print_tree_search(struct tcb *tcp, struct btrfs_ioctl_search_key *key,
 421                         uint64_t buf_addr, uint64_t buf_size, bool print_size)
 422 {
 423         if (entering(tcp)) {
 424                 tprintf("{key={tree_id=");
 425                 btrfs_print_objectid(key->tree_id);
 426
 427                 if (key->min_objectid != BTRFS_FIRST_FREE_OBJECTID ||
 428                     !abbrev(tcp)) {
 429                         tprints(", min_objectid=");
 430                         btrfs_print_objectid(key->min_objectid);
 431                 }
 432
 433                 if (key->max_objectid != BTRFS_LAST_FREE_OBJECTID ||
 434                     !abbrev(tcp)) {
 435                         tprints(", max_objectid=");
 436                         btrfs_print_objectid(key->max_objectid);
 437                 }
 438
 439                 print_key_value(tcp, key, min_offset);
 440                 print_key_value(tcp, key, max_offset);
 441                 print_key_value(tcp, key, min_transid);
 442                 print_key_value(tcp, key, max_transid);
 443
 444                 tprints(", min_type=");
 445                 btrfs_print_key_type(key->min_type);
 446                 tprints(", max_type=");
 447                 btrfs_print_key_type(key->max_type);
 448                 tprintf(", nr_items=%u}", key->nr_items);
 449                 if (print_size)
 450                         tprintf(", buf_size=%" PRIu64, buf_size);
 451                 tprints("}");
 452         } else {
 453                 tprintf("{key={nr_items=%u}", key->nr_items);
 454                 if (print_size)
 455                         tprintf(", buf_size=%" PRIu64, buf_size);
 456                 tprints(", buf=");
 457                 if (abbrev(tcp))
 458                         tprints("...");
 459                 else {
 460                         struct btrfs_ioctl_search_header sh;
 461
 462                         print_array(tcp, buf_addr, key->nr_items,
 463                                     &sh, sizeof(sh),
 464                                     umoven_or_printaddr,
 465                                     print_btrfs_ioctl_search_header, 0);
 466                 }
 467                 tprints("}");
 468         }
 469 }
 470
 471 static bool
 472 print_objectid_callback(struct tcb *tcp, void *elem_buf,
 473                         size_t elem_size, void *data)
 474 {
 475         btrfs_print_objectid(* (uint64_t *) elem_buf);
 476
 477         return true;
 478 }
 479
 480 static bool
 481 print_btrfs_ioctl_space_info(struct tcb *tcp, void *elem_buf,
 482                              size_t elem_size, void *data)
 483 {
 484         const struct btrfs_ioctl_space_info *info = elem_buf;
 485
 486         tprints("{flags=");
 487         printflags64(btrfs_space_info_flags, info->flags,
 488                      "BTRFS_SPACE_INFO_???");
 489         tprintf(", total_bytes=%" PRI__u64 ", used_bytes=%" PRI__u64 "}",
 490                 info->total_bytes, info->used_bytes);
 491
 492         return true;
 493 }
 494
 495 MPERS_PRINTER_DECL(int, btrfs_ioctl,
 496                    struct tcb *tcp, const unsigned int code, const long arg)
 497 {
 498         switch (code) {
 499         /* Take no arguments; command only. */
 500         case BTRFS_IOC_TRANS_START:
 501         case BTRFS_IOC_TRANS_END:
 502         case BTRFS_IOC_SYNC:
 503         case BTRFS_IOC_SCRUB_CANCEL:
 504         case BTRFS_IOC_QUOTA_RESCAN_WAIT:
 505         /*
 506          * The codes for these ioctls are based on each accepting a
 507          * vol_args but none of them actually consume an argument.
 508          */
 509         case BTRFS_IOC_DEFRAG:
 510         case BTRFS_IOC_BALANCE:
 511                 break;
 512
 513         /* takes a signed int */
 514         case BTRFS_IOC_BALANCE_CTL:
 515                 tprints(", ");
 516                 printxval(btrfs_balance_ctl_cmds, arg, "BTRFS_BALANCE_CTL_???");
 517                 break;
 518
 519         /* returns a 64 */
 520         case BTRFS_IOC_START_SYNC: /* R */
 521                 if (entering(tcp))
 522                         return 0;
 523         /* fall through */
 524         /* takes a u64 */
 525         case BTRFS_IOC_DEFAULT_SUBVOL: /* W */
 526         case BTRFS_IOC_WAIT_SYNC: /* W */
 527                 tprints(", ");
 528                 printnum_int64(tcp, arg, "%" PRIu64);
 529                 break;
 530
 531         /* u64 but describe a flags bitfield; we can make that symbolic */
 532         case BTRFS_IOC_SUBVOL_GETFLAGS: { /* R */
 533                 uint64_t flags;
 534
 535                 if (entering(tcp))
 536                         return 0;
 537
 538                 tprints(", ");
 539
 540                 if (umove_or_printaddr(tcp, arg, &flags))
 541                         break;
 542
 543                 printflags64(btrfs_snap_flags_v2, flags, "BTRFS_SUBVOL_???");
 544                 break;
 545         }
 546
 547         case BTRFS_IOC_SUBVOL_SETFLAGS: { /* W */
 548                 uint64_t flags;
 549
 550                 tprints(", ");
 551
 552                 if (umove_or_printaddr(tcp, arg, &flags))
 553                         break;
 554
 555                 printflags64(btrfs_snap_flags_v2, flags, "BTRFS_SUBVOL_???");
 556                 break;
 557         }
 558
 559         /* More complex types */
 560         case BTRFS_IOC_BALANCE_V2: /* RW */
 561                 if (entering(tcp)) {
 562                         tprints(", ");
 563                         btrfs_print_balance(tcp, arg, false);
 564                         return 0;
 565                 }
 566
 567                 if (syserror(tcp))
 568                         break;
 569
 570                 tprints(" => ");
 571                 btrfs_print_balance(tcp, arg, true);
 572                 break;
 573         case BTRFS_IOC_BALANCE_PROGRESS: /* R */
 574                 if (entering(tcp))
 575                         return 0;
 576
 577                 tprints(", ");
 578                 btrfs_print_balance(tcp, arg, true);
 579                 break;
 580
 581         case BTRFS_IOC_DEFRAG_RANGE: { /* W */
 582                 struct btrfs_ioctl_defrag_range_args args;
 583
 584                 tprints(", ");
 585
 586                 if (umove_or_printaddr(tcp, arg, &args))
 587                         break;
 588
 589                 tprintf("{start=%" PRIu64 ", len=", (uint64_t)args.start);
 590
 591                 tprintf("%" PRIu64, args.len);
 592                 if (args.len == UINT64_MAX)
 593                         tprints(" /* UINT64_MAX */");
 594
 595                 tprints(", flags=");
 596                 printflags64(btrfs_defrag_flags, args.flags,
 597                              "BTRFS_DEFRAG_RANGE_???");
 598                 tprintf(", extent_thresh=%u, compress_type=",
 599                         args.extent_thresh);
 600                 printxval(btrfs_compress_types, args.compress_type,
 601                           "BTRFS_COMPRESS_???");
 602                 tprints("}");
 603                 break;
 604         }
 605
 606         case BTRFS_IOC_DEV_INFO: { /* RW */
 607                 struct btrfs_ioctl_dev_info_args args;
 608                 char uuid[UUID_STRING_SIZE+1];
 609                 int valid;
 610
 611                 if (entering(tcp))
 612                         tprints(", ");
 613                 else if (syserror(tcp))
 614                         break;
 615                 else
 616                         tprints(" => ");
 617                 if (umove_or_printaddr(tcp, arg, &args))
 618                         break;
 619                 tprints("{");
 620
 621                 valid = btrfs_unparse_uuid(args.uuid, uuid);
 622                 if (entering(tcp)) {
 623                         tprintf("devid=%" PRI__u64, args.devid);
 624                         if (valid)
 625                                 tprintf(", uuid=%s", uuid);
 626                         tprints("}");
 627                         return 0;
 628                 }
 629                 if (valid)
 630                         tprintf("uuid=%s, ", uuid);
 631                 tprintf("bytes_used=%" PRI__u64
 632                         ", total_bytes=%" PRI__u64 ", path=",
 633                         args.bytes_used, args.total_bytes);
 634                 print_quoted_string((const char *)args.path, sizeof(args.path),
 635                                     QUOTE_0_TERMINATED);
 636                 tprints("}");
 637                 break;
 638         }
 639
 640         case BTRFS_IOC_DEV_REPLACE: { /* RW */
 641                 struct_btrfs_ioctl_dev_replace_args args;
 642
 643                 if (entering(tcp))
 644                         tprints(", ");
 645                 else if (syserror(tcp))
 646                         break;
 647                 else
 648                         tprints(" => ");
 649
 650                 if (umove_or_printaddr(tcp, arg, &args))
 651                         break;
 652
 653                 if (entering(tcp)) {
 654                         tprints("{cmd=");
 655                         printxval64(btrfs_dev_replace_cmds, args.cmd,
 656                                     "BTRFS_IOCTL_DEV_REPLACE_CMD_???");
 657                         if (args.cmd == BTRFS_IOCTL_DEV_REPLACE_CMD_START) {
 658                                 const char *str;
 659                                 tprintf(", start={srcdevid=%" PRIu64
 660                                    ", cont_reading_from_srcdev_mode=%" PRIu64
 661                                    ", srcdev_name=",
 662                                    (uint64_t) args.start.srcdevid,
 663                                    (uint64_t) args.start.cont_reading_from_srcdev_mode);
 664
 665                                 str = (const char*) args.start.srcdev_name;
 666                                 print_quoted_string(str,
 667                                                 sizeof(args.start.srcdev_name),
 668                                                 QUOTE_0_TERMINATED);
 669                                 tprints(", tgtdev_name=");
 670                                 str = (const char*) args.start.tgtdev_name;
 671                                 print_quoted_string(str,
 672                                                 sizeof(args.start.tgtdev_name),
 673                                                 QUOTE_0_TERMINATED);
 674                                 tprints("}");
 675
 676                         }
 677                         tprints("}");
 678                         return 0;
 679                 }
 680
 681                 tprints("{result=");
 682                 printxval64(btrfs_dev_replace_results, args.result,
 683                             "BTRFS_IOCTL_DEV_REPLACE_RESULT_???");
 684                 if (args.cmd == BTRFS_IOCTL_DEV_REPLACE_CMD_STATUS) {
 685                         char buf[sizeof("HH:MM:SS") + 1];
 686                         time_t time;
 687                         tprints(", ");
 688                         printxval64(btrfs_dev_replace_state,
 689                                    args.status.replace_state,
 690                                    "BTRFS_IOCTL_DEV_REPLACE_STATE_???");
 691                         tprintf(", progress_1000=%" PRIu64 " /* ",
 692                                 (uint64_t) args.status.progress_1000);
 693                         if (args.status.progress_1000 <= 1000)
 694                                 tprintf("%" PRIu64 ".%.2" PRIu64 "%%",
 695                                         (uint64_t) args.status.progress_1000 / 10,
 696                                         (uint64_t) args.status.progress_1000 % 10);
 697                         else
 698                                 tprints("???");
 699                         tprints(" */ ,");
 700
 701                         time = args.status.time_started;
 702                         strftime(buf, sizeof(buf), "%T",
 703                                  localtime(&time));
 704                         tprintf("time_started=%" PRIu64" /* %s */, ",
 705                                 (uint64_t) args.status.time_started, buf);
 706
 707                         time = args.status.time_stopped;
 708                         strftime(buf, sizeof(buf), "%T",
 709                                  localtime(&time));
 710                         tprintf("time_stopped=%" PRIu64" /* %s */, ",
 711                                 (uint64_t) args.status.time_stopped, buf);
 712
 713                         tprintf("num_write_errors=%" PRIu64
 714                                 ", num_uncorrectable_read_errors=%" PRIu64,
 715                                 (uint64_t) args.status.num_write_errors,
 716                                 (uint64_t) args.status.num_uncorrectable_read_errors);
 717                 }
 718                 tprints("}");
 719                 break;
 720         }
 721
 722         case BTRFS_IOC_GET_FEATURES: { /* R */
 723                 struct btrfs_ioctl_feature_flags flags;
 724
 725                 if (entering(tcp))
 726                         return 0;
 727
 728                 tprints(", ");
 729                 if (umove_or_printaddr(tcp, arg, &flags))
 730                         break;
 731
 732                 btrfs_print_features(&flags);
 733                 break;
 734         }
 735
 736         case BTRFS_IOC_SET_FEATURES: { /* W */
 737                 struct btrfs_ioctl_feature_flags flarg[2];
 738
 739                 tprints(", ");
 740
 741                 if (umove_or_printaddr(tcp, arg, &flarg))
 742                         break;
 743
 744                 tprints("[");
 745                 btrfs_print_features(&flarg[0]);
 746                 tprints(", ");
 747                 btrfs_print_features(&flarg[1]);
 748                 tprints("]");
 749                 break;
 750         }
 751
 752         case BTRFS_IOC_GET_SUPPORTED_FEATURES: { /* R */
 753                 struct btrfs_ioctl_feature_flags flarg[3];
 754
 755                 if (entering(tcp))
 756                         return 0;
 757
 758                 tprints(", ");
 759                 if (umove_or_printaddr(tcp, arg, &flarg))
 760                         break;
 761
 762                 tprints("[ /* supported */ ");
 763                 btrfs_print_features(&flarg[0]);
 764
 765                 tprints(", /* safe to set */ ");
 766                 btrfs_print_features(&flarg[1]);
 767
 768                 tprints(", /* safe to clear */ ");
 769                 btrfs_print_features(&flarg[2]);
 770                 tprints("]");
 771
 772                 break;
 773         }
 774
 775         case BTRFS_IOC_FS_INFO: { /* R */
 776                 struct btrfs_ioctl_fs_info_args args;
 777                 char uuid[UUID_STRING_SIZE+1];
 778                 uint32_t nodesize, sectorsize, clone_alignment;
 779 #ifndef HAVE_STRUCT_BTRFS_IOCTL_FS_INFO_ARGS_NODESIZE
 780                 __u32 *reserved32;
 781 #endif
 782
 783                 if (entering(tcp))
 784                         return 0;
 785
 786                 tprints(", ");
 787                 if (umove_or_printaddr(tcp, arg, &args))
 788                         break;
 789
 790 #ifdef HAVE_STRUCT_BTRFS_IOCTL_FS_INFO_ARGS_NODESIZE
 791                 nodesize = args.nodesize,
 792                 sectorsize = args.sectorsize,
 793                 clone_alignment = args.clone_alignment;
 794 #else
 795                 reserved32 = (__u32 *)args.reserved;
 796                 nodesize = reserved32[0];
 797                 sectorsize = reserved32[1];
 798                 clone_alignment = reserved32[2];
 799 #endif
 800                 btrfs_unparse_uuid(args.fsid, uuid);
 801
 802                 tprints("{");
 803                 tprintf("max_id=%" PRI__u64 ", num_devices=%" PRI__u64
 804                         ", fsid=%s, nodesize=%u, sectorsize=%u"
 805                         ", clone_alignment=%u",
 806                         args.max_id, args.num_devices, uuid,
 807                         nodesize, sectorsize, clone_alignment);
 808                 tprints("}");
 809                 break;
 810         }
 811
 812         case BTRFS_IOC_GET_DEV_STATS: { /* RW */
 813                 struct btrfs_ioctl_get_dev_stats args;
 814                 uint64_t i;
 815
 816                 if (entering(tcp))
 817                         tprints(", ");
 818                 else if (syserror(tcp))
 819                         break;
 820                 else
 821                         tprints(" => ");
 822                 if (umove_or_printaddr(tcp, arg, &args))
 823                         break;
 824
 825                 tprints("{");
 826
 827                 if (entering(tcp))
 828                         tprintf("devid=%" PRI__u64 ", ", args.devid);
 829
 830                 tprintf("nr_items=%" PRI__u64 ", flags=", args.nr_items);
 831                 printflags64(btrfs_dev_stats_flags, args.flags,
 832                              "BTRFS_DEV_STATS_???");
 833
 834                 if (entering(tcp)) {
 835                         tprints("}");
 836                         return 0;
 837                 }
 838
 839                 /*
 840                  * The structure has a 1k limit; Let's make sure we don't
 841                  * go off into the middle of nowhere with a bad nr_items
 842                  * value.
 843                  */
 844                 tprints(", [");
 845                 for (i = 0; i < args.nr_items; i++) {
 846                         if (i)
 847                                 tprints(", ");
 848                         if (i >= ARRAY_SIZE(args.values)) {
 849                                 tprints("...");
 850                                 break;
 851                         }
 852                         const char *name = xlookup(btrfs_dev_stats_values, i);
 853                         if (name)
 854                                 tprintf("/* %s */ ", name);
 855                         tprintf("%" PRI__u64, args.values[i]);
 856                 }
 857                 tprints("]}");
 858                 break;
 859         }
 860
 861         case BTRFS_IOC_INO_LOOKUP: { /* RW */
 862                 struct btrfs_ioctl_ino_lookup_args args;
 863
 864                 if (entering(tcp))
 865                         tprints(", ");
 866                 else if (syserror(tcp))
 867                         break;
 868                 else
 869                         tprints(" => ");
 870
 871                 if (umove_or_printaddr(tcp, arg, &args))
 872                         break;
 873
 874                 if (entering(tcp)) {
 875                         /* Use subvolume id of the containing root */
 876                         if (args.treeid == 0)
 877                                 /* abuse of auxstr to retain state */
 878                                 tcp->auxstr = (void *)1;
 879                         else
 880                                 tcp->auxstr = NULL;
 881
 882                         tprints("{treeid=");
 883                         btrfs_print_objectid(args.treeid);
 884                         tprints(", objectid=");
 885                         btrfs_print_objectid(args.objectid);
 886                         tprints("}");
 887                         return 0;
 888                 }
 889
 890                 tprints("{");
 891                 if (tcp->auxstr) {
 892                         tcp->auxstr = NULL;
 893                         tprints("treeid=");
 894                         btrfs_print_objectid(args.treeid);
 895                         tprints(", ");
 896                 }
 897
 898                 tprints("name=");
 899                 print_quoted_string(args.name, sizeof(args.name),
 900                                     QUOTE_0_TERMINATED);
 901                 tprints("}");
 902                 break;
 903         }
 904
 905         case BTRFS_IOC_INO_PATHS: { /* RW */
 906                 struct btrfs_ioctl_ino_path_args args;
 907
 908                 if (entering(tcp))
 909                         tprints(", ");
 910                 else if (syserror(tcp))
 911                         break;
 912                 else
 913                         tprints(" => ");
 914
 915                 if (umove_or_printaddr(tcp, arg, &args))
 916                         break;
 917
 918                 tprints("{");
 919
 920                 if (entering(tcp)) {
 921                         tprintf("inum=%" PRI__u64 ", size=%" PRI__u64,
 922                                 args.inum, args.size);
 923                         tprintf(", fspath=0x%" PRI__x64 "}", args.fspath);
 924                         return 0;
 925                 }
 926
 927                 tprints("fspath=");
 928                 btrfs_print_ino_path_container(tcp, args.fspath);
 929
 930                 tprints("}");
 931                 break;
 932         }
 933
 934         case BTRFS_IOC_LOGICAL_INO: { /* RW */
 935                 struct btrfs_ioctl_logical_ino_args args;
 936
 937                 if (entering(tcp))
 938                         tprints(", ");
 939                 else if (syserror(tcp))
 940                         break;
 941                 else
 942                         tprints(" => ");
 943
 944                 if (umove_or_printaddr(tcp, arg, &args))
 945                         break;
 946
 947                 tprints("{");
 948
 949                 if (entering(tcp)) {
 950                         tprintf("logical=%" PRI__u64 ", size=%" PRI__u64,
 951                                 args.logical, args.size);
 952                         tprintf(", inodes=0x%" PRI__x64 "}", args.inodes);
 953                         return 0;
 954                 }
 955
 956                 tprints("inodes=");
 957                 btrfs_print_logical_ino_container(tcp, args.inodes);
 958
 959                 tprints("}");
 960                 break;
 961         }
 962
 963         case BTRFS_IOC_QGROUP_ASSIGN: { /* W */
 964                 struct btrfs_ioctl_qgroup_assign_args args;
 965
 966                 tprints(", ");
 967                 if (umove_or_printaddr(tcp, arg, &args))
 968                         break;
 969
 970                 tprintf("{assign=%" PRI__u64 ", src=%" PRI__u64
 971                         ", dst=%" PRI__u64 "}",
 972                         args.assign, args.src, args.dst);
 973                 break;
 974         }
 975
 976         case BTRFS_IOC_QGROUP_CREATE: { /* W */
 977                 struct btrfs_ioctl_qgroup_create_args args;
 978
 979                 tprints(", ");
 980                 if (umove_or_printaddr(tcp, arg, &args))
 981                         break;
 982
 983                 tprintf("{create=%" PRI__u64 ", qgroupid=%" PRI__u64 "}",
 984                         args.create, args.qgroupid);
 985                 break;
 986         }
 987
 988         case BTRFS_IOC_QGROUP_LIMIT: { /* R */
 989                 struct btrfs_ioctl_qgroup_limit_args args;
 990
 991                 if (entering(tcp))
 992                         return 0;
 993
 994                 tprints(", ");
 995                 if (umove_or_printaddr(tcp, arg, &args))
 996                         break;
 997
 998                 tprintf("{qgroupid=%" PRI__u64 ", lim=", args.qgroupid);
 999                 btrfs_print_qgroup_limit(&args.lim);
1000                 tprints("}");
1001                 break;
1002         }
1003
1004         case BTRFS_IOC_QUOTA_CTL: { /* W */
1005                 struct btrfs_ioctl_quota_ctl_args args;
1006
1007                 tprints(", ");
1008                 if (umove_or_printaddr(tcp, arg, &args))
1009                         break;
1010
1011                 printxval64(btrfs_qgroup_ctl_cmds, args.cmd,
1012                             "BTRFS_QUOTA_CTL_???");
1013                 tprints("}");
1014
1015                 break;
1016         }
1017
1018         case BTRFS_IOC_QUOTA_RESCAN: { /* W */
1019                 struct btrfs_ioctl_quota_rescan_args args;
1020
1021                 tprints(", ");
1022                 if (umove_or_printaddr(tcp, arg, &args))
1023                         break;
1024
1025                 tprintf("{flags=%" PRI__u64 "}", args.flags);
1026                 break;
1027         }
1028
1029         case BTRFS_IOC_QUOTA_RESCAN_STATUS: { /* R */
1030                 struct btrfs_ioctl_quota_rescan_args args;
1031
1032                 if (entering(tcp))
1033                         return 0;
1034
1035                 tprints(", ");
1036                 if (umove_or_printaddr(tcp, arg, &args))
1037                         break;
1038
1039                 tprintf("{flags=%" PRI__u64 ", progress=", args.flags);
1040                 btrfs_print_objectid(args.progress);
1041                 tprints("}");
1042                 break;
1043         }
1044
1045         case BTRFS_IOC_SET_RECEIVED_SUBVOL: { /* RW */
1046                 struct_btrfs_ioctl_received_subvol_args args;
1047                 char uuid[UUID_STRING_SIZE+1];
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                         btrfs_unparse_uuid((unsigned char *)args.uuid, uuid);
1061                         tprintf("{uuid=%s, stransid=%" PRIu64
1062                                 ", stime=%" PRIu64 ".%u, flags=%" PRIu64
1063                                 "}", uuid, (uint64_t) args.stransid,
1064                                 (uint64_t) args.stime.sec, args.stime.nsec,
1065                                 (uint64_t) args.flags);
1066                         return 0;
1067                 }
1068                 tprintf("{rtransid=%" PRIu64 ", rtime=%" PRIu64 ".%u}",
1069                         (uint64_t) args.rtransid, (uint64_t) args.rtime.sec,
1070                         args.rtime.nsec);
1071                 break;
1072         }
1073
1074         case BTRFS_IOC_SCRUB: /* RW */
1075         case BTRFS_IOC_SCRUB_PROGRESS: { /* RW */
1076                 struct btrfs_ioctl_scrub_args args;
1077
1078                 if (entering(tcp))
1079                         tprints(", ");
1080                 else if (syserror(tcp))
1081                         break;
1082                 else
1083                         tprints(" => ");
1084
1085                 if (umove_or_printaddr(tcp, arg, &args))
1086                         break;
1087
1088                 if (entering(tcp)) {
1089                         tprintf("{devid=%" PRI__u64, args.devid);
1090                         if (code == BTRFS_IOC_SCRUB) {
1091                                 tprintf(", start=%" PRI__u64 ", end=",
1092                                         args.start);
1093                                 tprintf("%" PRI__u64, args.end);
1094                                 if (args.end == UINT64_MAX)
1095                                         tprints(" /* UINT64_MAX */");
1096                                 tprints(", flags=");
1097                                 printflags64(btrfs_scrub_flags, args.flags,
1098                                              "BTRFS_SCRUB_???");
1099                         }
1100                         tprints("}");
1101                         return 0;
1102                 }
1103                 tprintf("{data_extents_scrubbed=%" PRI__u64
1104                         ", tree_extents_scrubbed=%" PRI__u64
1105                         ", data_bytes_scrubbed=%" PRI__u64
1106                         ", tree_bytes_scrubbed=%" PRI__u64
1107                         ", read_errors=%" PRI__u64
1108                         ", csum_errors=%" PRI__u64
1109                         ", verify_errors=%" PRI__u64
1110                         ", no_csum=%" PRI__u64
1111                         ", csum_discards=%" PRI__u64
1112                         ", super_errors=%" PRI__u64
1113                         ", malloc_errors=%" PRI__u64
1114                         ", uncorrectable_errors=%" PRI__u64
1115                         ", corrected_errors=%" PRI__u64
1116                         ", last_physical=%" PRI__u64
1117                         ", unverified_errors=%" PRI__u64 "}",
1118                         args.progress.data_extents_scrubbed,
1119                         args.progress.tree_extents_scrubbed,
1120                         args.progress.data_bytes_scrubbed,
1121                         args.progress.tree_bytes_scrubbed,
1122                         args.progress.read_errors,
1123                         args.progress.csum_errors,
1124                         args.progress.verify_errors,
1125                         args.progress.no_csum,
1126                         args.progress.csum_discards,
1127                         args.progress.super_errors,
1128                         args.progress.malloc_errors,
1129                         args.progress.uncorrectable_errors,
1130                         args.progress.corrected_errors,
1131                         args.progress.last_physical,
1132                         args.progress.unverified_errors);
1133                 break;
1134         }
1135
1136         case BTRFS_IOC_TREE_SEARCH: { /* RW */
1137                 struct btrfs_ioctl_search_args args;
1138                 uint64_t buf_offset;
1139
1140                 if (entering(tcp))
1141                         tprints(", ");
1142                 else if (syserror(tcp))
1143                         break;
1144                 else
1145                         tprints(" => ");
1146
1147                 if (umove_or_printaddr(tcp, arg, &args))
1148                         break;
1149
1150                 buf_offset = offsetof(struct btrfs_ioctl_search_args, buf);
1151                 btrfs_print_tree_search(tcp, &args.key, arg + buf_offset,
1152                                         sizeof(args.buf), false);
1153                 if (entering(tcp))
1154                         return 0;
1155                 break;
1156         }
1157
1158         case BTRFS_IOC_TREE_SEARCH_V2: { /* RW */
1159                 struct btrfs_ioctl_search_args_v2 args;
1160                 uint64_t buf_offset;
1161
1162                 if (entering(tcp))
1163                         tprints(", ");
1164                 else if (syserror(tcp)) {
1165                         if (tcp->u_error == EOVERFLOW) {
1166                                 tprints(" => ");
1167                                 tcp->u_error = 0;
1168                                 if (!umove_or_printaddr(tcp, arg, &args))
1169                                         tprintf("{buf_size=%" PRIu64 "}",
1170                                                 (uint64_t)args.buf_size);
1171                                 tcp->u_error = EOVERFLOW;
1172                         }
1173                         break;
1174                 } else
1175                         tprints(" => ");
1176
1177                 if (umove_or_printaddr(tcp, arg, &args))
1178                         break;
1179
1180                 buf_offset = offsetof(struct btrfs_ioctl_search_args_v2, buf);
1181                 btrfs_print_tree_search(tcp, &args.key, arg + buf_offset,
1182                                         args.buf_size, true);
1183                 if (entering(tcp))
1184                         return 0;
1185                 break;
1186         }
1187
1188         case BTRFS_IOC_SEND: { /* W */
1189                 struct_btrfs_ioctl_send_args args;
1190
1191                 tprints(", ");
1192                 if (umove_or_printaddr(tcp, arg, &args))
1193                         break;
1194
1195                 tprints("{send_fd=");
1196                 printfd(tcp, args.send_fd);
1197                 tprintf(", clone_sources_count=%" PRIu64 ", clone_sources=",
1198                         (uint64_t) args.clone_sources_count);
1199
1200                 if (abbrev(tcp))
1201                         tprints("...");
1202                 else {
1203                         uint64_t record;
1204                         print_array(tcp, (unsigned long) args.clone_sources,
1205                                     args.clone_sources_count,
1206                                     &record, sizeof(record),
1207                                     umoven_or_printaddr,
1208                                     print_objectid_callback, 0);
1209                 }
1210                 tprints(", parent_root=");
1211                 btrfs_print_objectid(args.parent_root);
1212                 tprints(", flags=");
1213                 printflags64(btrfs_send_flags, args.flags,
1214                              "BTRFS_SEND_FLAGS_???");
1215                 tprints("}");
1216                 break;
1217         }
1218
1219         case BTRFS_IOC_SPACE_INFO: { /* RW */
1220                 struct btrfs_ioctl_space_args args;
1221
1222                 if (entering(tcp))
1223                         tprints(", ");
1224                 else if (syserror(tcp))
1225                         break;
1226                 else
1227                         tprints(" => ");
1228
1229                 if (umove_or_printaddr(tcp, arg, &args))
1230                         break;
1231
1232                 tprints("{");
1233                 if (entering(tcp)) {
1234                         tprintf("space_slots=%" PRI__u64 "}", args.space_slots);
1235                         return 0;
1236                 }
1237
1238                 tprintf("total_spaces=%" PRI__u64, args.total_spaces);
1239
1240                 if (args.space_slots == 0 && args.total_spaces) {
1241                         tprints("}");
1242                         break;
1243                 }
1244
1245                 tprints(", spaces=");
1246
1247                 if (abbrev(tcp))
1248                         tprints("...");
1249                 else {
1250                         struct btrfs_ioctl_space_info info;
1251                         print_array(tcp, arg + offsetof(typeof(args), spaces),
1252                                     args.total_spaces,
1253                                     &info, sizeof(info), umoven_or_printaddr,
1254                                     print_btrfs_ioctl_space_info, 0);
1255                 }
1256                 tprints("}");
1257                 break;
1258         }
1259
1260         case BTRFS_IOC_SNAP_CREATE:
1261         case BTRFS_IOC_RESIZE:
1262         case BTRFS_IOC_SCAN_DEV:
1263         case BTRFS_IOC_ADD_DEV:
1264         case BTRFS_IOC_RM_DEV:
1265         case BTRFS_IOC_SUBVOL_CREATE:
1266         case BTRFS_IOC_SNAP_DESTROY:
1267         case BTRFS_IOC_DEVICES_READY: { /* W */
1268                 struct btrfs_ioctl_vol_args args;
1269
1270                 tprints(", ");
1271                 if (umove_or_printaddr(tcp, arg, &args))
1272                         break;
1273
1274                 tprints("{fd=");
1275                 printfd(tcp, args.fd);
1276                 tprints(", name=");
1277                 print_quoted_string(args.name, sizeof(args.name),
1278                                     QUOTE_0_TERMINATED);
1279                 tprints("}");
1280                 break;
1281         }
1282
1283         case BTRFS_IOC_SNAP_CREATE_V2:
1284         case BTRFS_IOC_SUBVOL_CREATE_V2: { /* code is W, but is actually RW */
1285                 struct btrfs_ioctl_vol_args_v2 args;
1286
1287                 if (entering(tcp))
1288                         tprints(", ");
1289                 else if (syserror(tcp))
1290                         break;
1291                 else
1292                         tprints(" => ");
1293
1294                 if (umove_or_printaddr(tcp, arg, &args))
1295                         break;
1296
1297                 if (entering(tcp)) {
1298                         tprints("{fd=");
1299                         printfd(tcp, args.fd);
1300                         tprints(", flags=");
1301                         printflags64(btrfs_snap_flags_v2, args.flags,
1302                                      "BTRFS_SUBVOL_???");
1303                         if (args.flags & BTRFS_SUBVOL_QGROUP_INHERIT) {
1304                                 tprintf(", size=%" PRI__u64 ", qgroup_inherit=",
1305                                         args.size);
1306
1307                                 btrfs_print_qgroup_inherit(tcp,
1308                                         (unsigned long)args.qgroup_inherit);
1309                         }
1310                         tprintf(", name=");
1311                         print_quoted_string(args.name, sizeof(args.name),
1312                                             QUOTE_0_TERMINATED);
1313                         tprints("}");
1314                         return 0;
1315                 }
1316                 tprintf("{transid=%" PRI__u64 "}", args.transid);
1317                 break;
1318         }
1319
1320         case BTRFS_IOC_GET_FSLABEL: /* R */
1321                 if (entering(tcp))
1322                         return 0;
1323                 /* fall through */
1324         case BTRFS_IOC_SET_FSLABEL: { /* W */
1325                 char label[BTRFS_LABEL_SIZE];
1326
1327                 tprints(", ");
1328                 if (umove_or_printaddr(tcp, arg, &label))
1329                         break;
1330                 print_quoted_string(label, sizeof(label), QUOTE_0_TERMINATED);
1331                 break;
1332         }
1333
1334         case BTRFS_IOC_CLONE:                   /* FICLONE */
1335         case BTRFS_IOC_CLONE_RANGE:             /* FICLONERANGE */
1336 #ifdef BTRFS_IOC_FILE_EXTENT_SAME
1337         case BTRFS_IOC_FILE_EXTENT_SAME:        /* FIDEDUPERANGE */
1338 #endif
1339                 /*
1340                  * FICLONE, FICLONERANGE, and FIDEDUPERANGE started out as
1341                  * btrfs ioctls and the code was kept for the generic
1342                  * implementations.  We use the BTRFS_* names here because
1343                  * they will be available on older systems.
1344                  */
1345                 return file_ioctl(tcp, code, arg);
1346
1347         default:
1348                 return RVAL_DECODED;
1349         };
1350         return RVAL_DECODED | 1;
1351 }
1352 #endif /* HAVE_LINUX_BTRFS_H */