git.sesse.net Git - bcachefs-tools-debian/blob - cmd_fusemount.c

   1 #ifdef BCACHEFS_FUSE
   2
   3 #include <errno.h>
   4 #include <float.h>
   5 #include <getopt.h>
   6 #include <stdio.h>
   7 #include <sys/statvfs.h>
   8
   9 #include <fuse_lowlevel.h>
  10
  11 #include "cmds.h"
  12 #include "libbcachefs.h"
  13 #include "tools-util.h"
  14
  15 #include "libbcachefs/bcachefs.h"
  16 #include "libbcachefs/alloc_foreground.h"
  17 #include "libbcachefs/btree_iter.h"
  18 #include "libbcachefs/buckets.h"
  19 #include "libbcachefs/dirent.h"
  20 #include "libbcachefs/errcode.h"
  21 #include "libbcachefs/error.h"
  22 #include "libbcachefs/fs-common.h"
  23 #include "libbcachefs/inode.h"
  24 #include "libbcachefs/io_read.h"
  25 #include "libbcachefs/io_write.h"
  26 #include "libbcachefs/opts.h"
  27 #include "libbcachefs/super.h"
  28
  29 /* mode_to_type(): */
  30 #include "libbcachefs/fs.h"
  31
  32 #include <linux/dcache.h>
  33
  34 /* XXX cut and pasted from fsck.c */
  35 #define QSTR(n) { { { .len = strlen(n) } }, .name = n }
  36
  37 /* used by write_aligned function for waiting on bch2_write closure */
  38 struct write_aligned_op_t {
  39         struct closure cl;
  40
  41         /* must be last: */
  42         struct bch_write_op             op;
  43 };
  44
  45
  46 static inline subvol_inum map_root_ino(u64 ino)
  47 {
  48         return (subvol_inum) { 1, ino == 1 ? 4096 : ino };
  49 }
  50
  51 static inline u64 unmap_root_ino(u64 ino)
  52 {
  53         return ino == 4096 ? 1 : ino;
  54 }
  55
  56 static struct stat inode_to_stat(struct bch_fs *c,
  57                                  struct bch_inode_unpacked *bi)
  58 {
  59         return (struct stat) {
  60                 .st_ino         = unmap_root_ino(bi->bi_inum),
  61                 .st_size        = bi->bi_size,
  62                 .st_mode        = bi->bi_mode,
  63                 .st_uid         = bi->bi_uid,
  64                 .st_gid         = bi->bi_gid,
  65                 .st_nlink       = bch2_inode_nlink_get(bi),
  66                 .st_rdev        = bi->bi_dev,
  67                 .st_blksize     = block_bytes(c),
  68                 .st_blocks      = bi->bi_sectors,
  69                 .st_atim        = bch2_time_to_timespec(c, bi->bi_atime),
  70                 .st_mtim        = bch2_time_to_timespec(c, bi->bi_mtime),
  71                 .st_ctim        = bch2_time_to_timespec(c, bi->bi_ctime),
  72         };
  73 }
  74
  75 static struct fuse_entry_param inode_to_entry(struct bch_fs *c,
  76                                               struct bch_inode_unpacked *bi)
  77 {
  78         return (struct fuse_entry_param) {
  79                 .ino            = unmap_root_ino(bi->bi_inum),
  80                 .generation     = bi->bi_generation,
  81                 .attr           = inode_to_stat(c, bi),
  82                 .attr_timeout   = DBL_MAX,
  83                 .entry_timeout  = DBL_MAX,
  84         };
  85 }
  86
  87 static void bcachefs_fuse_init(void *arg, struct fuse_conn_info *conn)
  88 {
  89         if (conn->capable & FUSE_CAP_WRITEBACK_CACHE) {
  90                 fuse_log(FUSE_LOG_DEBUG, "fuse_init: activating writeback\n");
  91                 conn->want |= FUSE_CAP_WRITEBACK_CACHE;
  92         } else
  93                 fuse_log(FUSE_LOG_DEBUG, "fuse_init: writeback not capable\n");
  94
  95         //conn->want |= FUSE_CAP_POSIX_ACL;
  96 }
  97
  98 static void bcachefs_fuse_destroy(void *arg)
  99 {
 100         struct bch_fs *c = arg;
 101
 102         bch2_fs_stop(c);
 103 }
 104
 105 static void bcachefs_fuse_lookup(fuse_req_t req, fuse_ino_t dir_ino,
 106                                  const char *name)
 107 {
 108         subvol_inum dir = map_root_ino(dir_ino);
 109         struct bch_fs *c = fuse_req_userdata(req);
 110         struct bch_inode_unpacked bi;
 111         struct qstr qstr = QSTR(name);
 112         subvol_inum inum;
 113         int ret;
 114
 115         fuse_log(FUSE_LOG_DEBUG, "fuse_lookup(dir=%llu name=%s)\n",
 116                  dir.inum, name);
 117
 118         ret = bch2_inode_find_by_inum(c, dir, &bi);
 119         if (ret) {
 120                 fuse_reply_err(req, -ret);
 121                 return;
 122         }
 123
 124         struct bch_hash_info hash_info = bch2_hash_info_init(c, &bi);
 125
 126         ret = bch2_dirent_lookup(c, dir, &hash_info, &qstr, &inum);
 127         if (ret) {
 128                 struct fuse_entry_param e = {
 129                         .attr_timeout   = DBL_MAX,
 130                         .entry_timeout  = DBL_MAX,
 131                 };
 132                 fuse_reply_entry(req, &e);
 133                 return;
 134         }
 135
 136         ret = bch2_inode_find_by_inum(c, inum, &bi);
 137         if (ret)
 138                 goto err;
 139
 140         fuse_log(FUSE_LOG_DEBUG, "fuse_lookup ret(inum=%llu)\n",
 141                  bi.bi_inum);
 142
 143         struct fuse_entry_param e = inode_to_entry(c, &bi);
 144         fuse_reply_entry(req, &e);
 145         return;
 146 err:
 147         fuse_log(FUSE_LOG_DEBUG, "fuse_lookup error %i\n", ret);
 148         fuse_reply_err(req, -ret);
 149 }
 150
 151 static void bcachefs_fuse_getattr(fuse_req_t req, fuse_ino_t ino,
 152                                   struct fuse_file_info *fi)
 153 {
 154         subvol_inum inum = map_root_ino(ino);
 155         struct bch_fs *c = fuse_req_userdata(req);
 156         struct bch_inode_unpacked bi;
 157         struct stat attr;
 158
 159         fuse_log(FUSE_LOG_DEBUG, "fuse_getattr(inum=%llu)\n", inum.inum);
 160
 161         int ret = bch2_inode_find_by_inum(c, inum, &bi);
 162         if (ret) {
 163                 fuse_log(FUSE_LOG_DEBUG, "fuse_getattr error %i\n", ret);
 164                 fuse_reply_err(req, -ret);
 165                 return;
 166         }
 167
 168         fuse_log(FUSE_LOG_DEBUG, "fuse_getattr success\n");
 169
 170         attr = inode_to_stat(c, &bi);
 171         fuse_reply_attr(req, &attr, DBL_MAX);
 172 }
 173
 174 static void bcachefs_fuse_setattr(fuse_req_t req, fuse_ino_t ino,
 175                                   struct stat *attr, int to_set,
 176                                   struct fuse_file_info *fi)
 177 {
 178         struct bch_fs *c = fuse_req_userdata(req);
 179         struct bch_inode_unpacked inode_u;
 180         struct btree_trans *trans;
 181         struct btree_iter iter;
 182         u64 now;
 183         int ret;
 184
 185         subvol_inum inum = map_root_ino(ino);
 186
 187         fuse_log(FUSE_LOG_DEBUG, "bcachefs_fuse_setattr(%llu, %x)\n", inum.inum, to_set);
 188
 189         trans = bch2_trans_get(c);
 190 retry:
 191         bch2_trans_begin(trans);
 192         now = bch2_current_time(c);
 193
 194         ret = bch2_inode_peek(trans, &iter, &inode_u, inum, BTREE_ITER_INTENT);
 195         if (ret)
 196                 goto err;
 197
 198         if (to_set & FUSE_SET_ATTR_MODE)
 199                 inode_u.bi_mode = attr->st_mode;
 200         if (to_set & FUSE_SET_ATTR_UID)
 201                 inode_u.bi_uid  = attr->st_uid;
 202         if (to_set & FUSE_SET_ATTR_GID)
 203                 inode_u.bi_gid  = attr->st_gid;
 204         if (to_set & FUSE_SET_ATTR_SIZE)
 205                 inode_u.bi_size = attr->st_size;
 206         if (to_set & FUSE_SET_ATTR_ATIME)
 207                 inode_u.bi_atime = timespec_to_bch2_time(c, attr->st_atim);
 208         if (to_set & FUSE_SET_ATTR_MTIME)
 209                 inode_u.bi_mtime = timespec_to_bch2_time(c, attr->st_mtim);
 210         if (to_set & FUSE_SET_ATTR_ATIME_NOW)
 211                 inode_u.bi_atime = now;
 212         if (to_set & FUSE_SET_ATTR_MTIME_NOW)
 213                 inode_u.bi_mtime = now;
 214         /* TODO: CTIME? */
 215
 216         ret   = bch2_inode_write(trans, &iter, &inode_u) ?:
 217                 bch2_trans_commit(trans, NULL, NULL,
 218                                   BCH_TRANS_COMMIT_no_enospc);
 219 err:
 220         bch2_trans_iter_exit(trans, &iter);
 221         if (ret == -EINTR)
 222                 goto retry;
 223
 224         bch2_trans_put(trans);
 225
 226         if (!ret) {
 227                 *attr = inode_to_stat(c, &inode_u);
 228                 fuse_reply_attr(req, attr, DBL_MAX);
 229         } else {
 230                 fuse_reply_err(req, -ret);
 231         }
 232 }
 233
 234 static int do_create(struct bch_fs *c, subvol_inum dir,
 235                      const char *name, mode_t mode, dev_t rdev,
 236                      struct bch_inode_unpacked *new_inode)
 237 {
 238         struct qstr qstr = QSTR(name);
 239         struct bch_inode_unpacked dir_u;
 240         uid_t uid = 0;
 241         gid_t gid = 0;
 242
 243         bch2_inode_init_early(c, new_inode);
 244
 245         return bch2_trans_do(c, NULL, NULL, 0,
 246                         bch2_create_trans(trans,
 247                                 dir, &dir_u,
 248                                 new_inode, &qstr,
 249                                 uid, gid, mode, rdev, NULL, NULL,
 250                                 (subvol_inum) { 0 }, 0));
 251 }
 252
 253 static void bcachefs_fuse_mknod(fuse_req_t req, fuse_ino_t dir_ino,
 254                                 const char *name, mode_t mode,
 255                                 dev_t rdev)
 256 {
 257         subvol_inum dir = map_root_ino(dir_ino);
 258         struct bch_fs *c = fuse_req_userdata(req);
 259         struct bch_inode_unpacked new_inode;
 260         int ret;
 261
 262         fuse_log(FUSE_LOG_DEBUG, "bcachefs_fuse_mknod(%llu, %s, %x, %x)\n",
 263                  dir.inum, name, mode, rdev);
 264
 265         ret = do_create(c, dir, name, mode, rdev, &new_inode);
 266         if (ret)
 267                 goto err;
 268
 269         struct fuse_entry_param e = inode_to_entry(c, &new_inode);
 270         fuse_reply_entry(req, &e);
 271         return;
 272 err:
 273         fuse_reply_err(req, -ret);
 274 }
 275
 276 static void bcachefs_fuse_mkdir(fuse_req_t req, fuse_ino_t dir,
 277                                 const char *name, mode_t mode)
 278 {
 279         fuse_log(FUSE_LOG_DEBUG, "bcachefs_fuse_mkdir(%llu, %s, %x)\n",
 280                  dir, name, mode);
 281
 282         BUG_ON(mode & S_IFMT);
 283
 284         mode |= S_IFDIR;
 285         bcachefs_fuse_mknod(req, dir, name, mode, 0);
 286 }
 287
 288 static void bcachefs_fuse_unlink(fuse_req_t req, fuse_ino_t dir_ino,
 289                                  const char *name)
 290 {
 291         struct bch_fs *c = fuse_req_userdata(req);
 292         struct bch_inode_unpacked dir_u, inode_u;
 293         struct qstr qstr = QSTR(name);
 294         subvol_inum dir = map_root_ino(dir_ino);
 295
 296         fuse_log(FUSE_LOG_DEBUG, "bcachefs_fuse_unlink(%llu, %s)\n", dir.inum, name);
 297
 298         int ret = bch2_trans_do(c, NULL, NULL,
 299                                 BCH_TRANS_COMMIT_no_enospc,
 300                             bch2_unlink_trans(trans, dir, &dir_u,
 301                                               &inode_u, &qstr, false));
 302
 303         fuse_reply_err(req, -ret);
 304 }
 305
 306 static void bcachefs_fuse_rmdir(fuse_req_t req, fuse_ino_t dir,
 307                                 const char *name)
 308 {
 309         fuse_log(FUSE_LOG_DEBUG, "bcachefs_fuse_rmdir(%llu, %s)\n", dir, name);
 310
 311         bcachefs_fuse_unlink(req, dir, name);
 312 }
 313
 314 static void bcachefs_fuse_rename(fuse_req_t req,
 315                                  fuse_ino_t src_dir_ino, const char *srcname,
 316                                  fuse_ino_t dst_dir_ino, const char *dstname,
 317                                  unsigned flags)
 318 {
 319         struct bch_fs *c = fuse_req_userdata(req);
 320         struct bch_inode_unpacked dst_dir_u, src_dir_u;
 321         struct bch_inode_unpacked src_inode_u, dst_inode_u;
 322         struct qstr dst_name = QSTR(srcname);
 323         struct qstr src_name = QSTR(dstname);
 324         subvol_inum src_dir = map_root_ino(src_dir_ino);
 325         subvol_inum dst_dir = map_root_ino(dst_dir_ino);
 326         int ret;
 327
 328         fuse_log(FUSE_LOG_DEBUG,
 329                  "bcachefs_fuse_rename(%llu, %s, %llu, %s, %x)\n",
 330                  src_dir.inum, srcname, dst_dir.inum, dstname, flags);
 331
 332         /* XXX handle overwrites */
 333         ret = bch2_trans_do(c, NULL, NULL, 0,
 334                 bch2_rename_trans(trans,
 335                                   src_dir, &src_dir_u,
 336                                   dst_dir, &dst_dir_u,
 337                                   &src_inode_u, &dst_inode_u,
 338                                   &src_name, &dst_name,
 339                                   BCH_RENAME));
 340
 341         fuse_reply_err(req, -ret);
 342 }
 343
 344 static void bcachefs_fuse_link(fuse_req_t req, fuse_ino_t ino,
 345                                fuse_ino_t newparent_ino, const char *newname)
 346 {
 347         struct bch_fs *c = fuse_req_userdata(req);
 348         struct bch_inode_unpacked dir_u, inode_u;
 349         struct qstr qstr = QSTR(newname);
 350         subvol_inum newparent   = map_root_ino(newparent_ino);
 351         subvol_inum inum        = map_root_ino(ino);
 352         int ret;
 353
 354         fuse_log(FUSE_LOG_DEBUG, "bcachefs_fuse_link(%llu, %llu, %s)\n",
 355                  inum.inum, newparent.inum, newname);
 356
 357         ret = bch2_trans_do(c, NULL, NULL, 0,
 358                             bch2_link_trans(trans, newparent, &dir_u,
 359                                             inum, &inode_u, &qstr));
 360
 361         if (!ret) {
 362                 struct fuse_entry_param e = inode_to_entry(c, &inode_u);
 363                 fuse_reply_entry(req, &e);
 364         } else {
 365                 fuse_reply_err(req, -ret);
 366         }
 367 }
 368
 369 static void bcachefs_fuse_open(fuse_req_t req, fuse_ino_t inum,
 370                                struct fuse_file_info *fi)
 371 {
 372         fi->direct_io           = false;
 373         fi->keep_cache          = true;
 374         fi->cache_readdir       = true;
 375
 376         fuse_reply_open(req, fi);
 377 }
 378
 379 static void userbio_init(struct bio *bio, struct bio_vec *bv,
 380                          void *buf, size_t size)
 381 {
 382         bio_init(bio, NULL, bv, 1, 0);
 383         bio->bi_iter.bi_size    = size;
 384         bv->bv_page             = buf;
 385         bv->bv_len              = size;
 386         bv->bv_offset           = 0;
 387 }
 388
 389 static int get_inode_io_opts(struct bch_fs *c, subvol_inum inum, struct bch_io_opts *opts)
 390 {
 391         struct bch_inode_unpacked inode;
 392         if (bch2_inode_find_by_inum(c, inum, &inode))
 393                 return -EINVAL;
 394
 395         bch2_inode_opts_get(opts, c, &inode);
 396         return 0;
 397 }
 398
 399 static void bcachefs_fuse_read_endio(struct bio *bio)
 400 {
 401         closure_put(bio->bi_private);
 402 }
 403
 404
 405 static void bcachefs_fuse_write_endio(struct bch_write_op *op)
 406 {
 407        struct write_aligned_op_t *w = container_of(op,struct write_aligned_op_t,op);
 408        closure_put(&w->cl);
 409 }
 410
 411
 412 struct fuse_align_io {
 413         off_t           start;
 414         size_t          pad_start;
 415         off_t           end;
 416         size_t          pad_end;
 417         size_t          size;
 418 };
 419
 420 /* Handle unaligned start and end */
 421 /* TODO: align to block_bytes, sector size, or page size? */
 422 static struct fuse_align_io align_io(const struct bch_fs *c, size_t size,
 423                                      off_t offset)
 424 {
 425         struct fuse_align_io align;
 426
 427         BUG_ON(offset < 0);
 428
 429         align.start = round_down(offset, block_bytes(c));
 430         align.pad_start = offset - align.start;
 431
 432         off_t end = offset + size;
 433         align.end = round_up(end, block_bytes(c));
 434         align.pad_end = align.end - end;
 435
 436         align.size = align.end - align.start;
 437
 438         return align;
 439 }
 440
 441 /*
 442  * Given an aligned number of bytes transferred, figure out how many unaligned
 443  * bytes were transferred.
 444  */
 445 static size_t align_fix_up_bytes(const struct fuse_align_io *align,
 446                                  size_t align_bytes)
 447 {
 448         size_t bytes = 0;
 449
 450         if (align_bytes > align->pad_start) {
 451                 bytes = align_bytes - align->pad_start;
 452                 bytes = bytes > align->pad_end ? bytes - align->pad_end : 0;
 453         }
 454
 455         return bytes;
 456 }
 457
 458 /*
 459  * Read aligned data.
 460  */
 461 static int read_aligned(struct bch_fs *c, subvol_inum inum, size_t aligned_size,
 462                         off_t aligned_offset, void *buf)
 463 {
 464         BUG_ON(aligned_size & (block_bytes(c) - 1));
 465         BUG_ON(aligned_offset & (block_bytes(c) - 1));
 466
 467         struct bch_io_opts io_opts;
 468         if (get_inode_io_opts(c, inum, &io_opts))
 469                 return -ENOENT;
 470
 471         struct bch_read_bio rbio;
 472         struct bio_vec bv;
 473         userbio_init(&rbio.bio, &bv, buf, aligned_size);
 474         bio_set_op_attrs(&rbio.bio, REQ_OP_READ, REQ_SYNC);
 475         rbio.bio.bi_iter.bi_sector      = aligned_offset >> 9;
 476
 477         struct closure cl;
 478         closure_init_stack(&cl);
 479
 480         closure_get(&cl);
 481         rbio.bio.bi_end_io              = bcachefs_fuse_read_endio;
 482         rbio.bio.bi_private             = &cl;
 483
 484         bch2_read(c, rbio_init(&rbio.bio, io_opts), inum);
 485
 486         closure_sync(&cl);
 487
 488         return -blk_status_to_errno(rbio.bio.bi_status);
 489 }
 490
 491 static void bcachefs_fuse_read(fuse_req_t req, fuse_ino_t ino,
 492                                size_t size, off_t offset,
 493                                struct fuse_file_info *fi)
 494 {
 495         subvol_inum inum = map_root_ino(ino);
 496         struct bch_fs *c = fuse_req_userdata(req);
 497
 498         fuse_log(FUSE_LOG_DEBUG, "bcachefs_fuse_read(%llu, %zd, %lld)\n",
 499                  inum, size, offset);
 500
 501         /* Check inode size. */
 502         struct bch_inode_unpacked bi;
 503         int ret = bch2_inode_find_by_inum(c, inum, &bi);
 504         if (ret) {
 505                 fuse_reply_err(req, -ret);
 506                 return;
 507         }
 508
 509         off_t end = min_t(u64, bi.bi_size, offset + size);
 510         if (end <= offset) {
 511                 fuse_reply_buf(req, NULL, 0);
 512                 return;
 513         }
 514         size = end - offset;
 515
 516         struct fuse_align_io align = align_io(c, size, offset);
 517
 518         void *buf = aligned_alloc(PAGE_SIZE, align.size);
 519         if (!buf) {
 520                 fuse_reply_err(req, ENOMEM);
 521                 return;
 522         }
 523
 524         ret = read_aligned(c, inum, align.size, align.start, buf);
 525
 526         if (likely(!ret))
 527                 fuse_reply_buf(req, buf + align.pad_start, size);
 528         else
 529                 fuse_reply_err(req, -ret);
 530
 531         free(buf);
 532 }
 533
 534 static int inode_update_times(struct bch_fs *c, subvol_inum inum)
 535 {
 536         struct btree_trans *trans;
 537         struct btree_iter iter;
 538         struct bch_inode_unpacked inode_u;
 539         int ret = 0;
 540         u64 now;
 541
 542         trans = bch2_trans_get(c);
 543 retry:
 544         bch2_trans_begin(trans);
 545         now = bch2_current_time(c);
 546
 547         ret = bch2_inode_peek(trans, &iter, &inode_u, inum, BTREE_ITER_INTENT);
 548         if (ret)
 549                 goto err;
 550
 551         inode_u.bi_mtime = now;
 552         inode_u.bi_ctime = now;
 553
 554         ret = bch2_inode_write(trans, &iter, &inode_u);
 555         if (ret)
 556                 goto err;
 557
 558         ret = bch2_trans_commit(trans, NULL, NULL,
 559                                 BCH_TRANS_COMMIT_no_enospc);
 560 err:
 561         bch2_trans_iter_exit(trans, &iter);
 562         if (ret == -EINTR)
 563                 goto retry;
 564
 565         bch2_trans_put(trans);
 566         return ret;
 567 }
 568
 569 static int write_aligned(struct bch_fs *c, subvol_inum inum,
 570                          struct bch_io_opts io_opts, void *buf,
 571                          size_t aligned_size, off_t aligned_offset,
 572                          off_t new_i_size, size_t *written_out)
 573 {
 574
 575         struct write_aligned_op_t w = { 0 }
 576 ;
 577         struct bch_write_op     *op = &w.op;
 578         struct bio_vec          bv;
 579
 580         BUG_ON(aligned_size & (block_bytes(c) - 1));
 581         BUG_ON(aligned_offset & (block_bytes(c) - 1));
 582
 583         *written_out = 0;
 584
 585         closure_init_stack(&w.cl);
 586
 587         bch2_write_op_init(op, c, io_opts); /* XXX reads from op?! */
 588         op->write_point = writepoint_hashed(0);
 589         op->nr_replicas = io_opts.data_replicas;
 590         op->target      = io_opts.foreground_target;
 591         op->subvol      = inum.subvol;
 592         op->pos         = POS(inum.inum, aligned_offset >> 9);
 593         op->new_i_size  = new_i_size;
 594         op->end_io = bcachefs_fuse_write_endio;
 595
 596         userbio_init(&op->wbio.bio, &bv, buf, aligned_size);
 597         bio_set_op_attrs(&op->wbio.bio, REQ_OP_WRITE, REQ_SYNC);
 598
 599         if (bch2_disk_reservation_get(c, &op->res, aligned_size >> 9,
 600                                       op->nr_replicas, 0)) {
 601                 /* XXX: use check_range_allocated like dio write path */
 602                 return -ENOSPC;
 603         }
 604
 605         closure_get(&w.cl);
 606
 607         closure_call(&op->cl, bch2_write, NULL, NULL);
 608
 609         closure_sync(&w.cl);
 610
 611         if (!op->error)
 612                 *written_out = op->written << 9;
 613
 614         return op->error;
 615 }
 616
 617 static void bcachefs_fuse_write(fuse_req_t req, fuse_ino_t ino,
 618                                 const char *buf, size_t size,
 619                                 off_t offset,
 620                                 struct fuse_file_info *fi)
 621 {
 622         subvol_inum inum = map_root_ino(ino);
 623         struct bch_fs *c        = fuse_req_userdata(req);
 624         struct bch_io_opts      io_opts;
 625         size_t                  aligned_written;
 626         int                     ret = 0;
 627
 628         fuse_log(FUSE_LOG_DEBUG, "bcachefs_fuse_write(%llu, %zd, %lld)\n",
 629                  inum, size, offset);
 630
 631         struct fuse_align_io align = align_io(c, size, offset);
 632         void *aligned_buf = aligned_alloc(PAGE_SIZE, align.size);
 633         BUG_ON(!aligned_buf);
 634
 635         if (get_inode_io_opts(c, inum, &io_opts)) {
 636                 ret = -ENOENT;
 637                 goto err;
 638         }
 639
 640         /* Realign the data and read in start and end, if needed */
 641
 642         /* Read partial start data. */
 643         if (align.pad_start) {
 644                 memset(aligned_buf, 0, block_bytes(c));
 645
 646                 ret = read_aligned(c, inum, block_bytes(c), align.start,
 647                                    aligned_buf);
 648                 if (ret)
 649                         goto err;
 650         }
 651
 652         /*
 653          * Read partial end data. If the whole write fits in one block, the
 654          * start data and the end data are the same so this isn't needed.
 655          */
 656         if (align.pad_end &&
 657             !(align.pad_start && align.size == block_bytes(c))) {
 658                 off_t partial_end_start = align.end - block_bytes(c);
 659                 size_t buf_offset = align.size - block_bytes(c);
 660
 661                 memset(aligned_buf + buf_offset, 0, block_bytes(c));
 662
 663                 ret = read_aligned(c, inum, block_bytes(c), partial_end_start,
 664                                    aligned_buf + buf_offset);
 665                 if (ret)
 666                         goto err;
 667         }
 668
 669         /* Overlay what we want to write. */
 670         memcpy(aligned_buf + align.pad_start, buf, size);
 671
 672         /* Actually write. */
 673         ret = write_aligned(c, inum, io_opts, aligned_buf,
 674                             align.size, align.start,
 675                             offset + size, &aligned_written);
 676
 677         /* Figure out how many unaligned bytes were written. */
 678         size_t written = align_fix_up_bytes(&align, aligned_written);
 679         BUG_ON(written > size);
 680
 681         fuse_log(FUSE_LOG_DEBUG, "bcachefs_fuse_write: wrote %zd bytes\n",
 682                  written);
 683
 684         if (written > 0)
 685                 ret = 0;
 686
 687         /*
 688          * Update inode times.
 689          * TODO: Integrate with bch2_extent_update()
 690          */
 691         if (!ret)
 692                 ret = inode_update_times(c, inum);
 693
 694         if (!ret) {
 695                 BUG_ON(written == 0);
 696                 fuse_reply_write(req, written);
 697                 free(aligned_buf);
 698                 return;
 699         }
 700
 701 err:
 702         fuse_reply_err(req, -ret);
 703         free(aligned_buf);
 704 }
 705
 706 static void bcachefs_fuse_symlink(fuse_req_t req, const char *link,
 707                                   fuse_ino_t dir_ino, const char *name)
 708 {
 709         subvol_inum dir = map_root_ino(dir_ino);
 710         struct bch_fs *c = fuse_req_userdata(req);
 711         struct bch_inode_unpacked new_inode;
 712         size_t link_len = strlen(link);
 713         int ret;
 714
 715         fuse_log(FUSE_LOG_DEBUG, "bcachefs_fuse_symlink(%s, %llu, %s)\n",
 716                  link, dir.inum, name);
 717
 718         ret = do_create(c, dir, name, S_IFLNK|S_IRWXUGO, 0, &new_inode);
 719         if (ret)
 720                 goto err;
 721
 722         struct bch_io_opts io_opts;
 723         ret = get_inode_io_opts(c, dir, &io_opts);
 724         if (ret)
 725                 goto err;
 726
 727         struct fuse_align_io align = align_io(c, link_len + 1, 0);
 728
 729         void *aligned_buf = aligned_alloc(PAGE_SIZE, align.size);
 730         BUG_ON(!aligned_buf);
 731
 732         memset(aligned_buf, 0, align.size);
 733         memcpy(aligned_buf, link, link_len); /* already terminated */
 734
 735         subvol_inum inum = (subvol_inum) { dir.subvol, new_inode.bi_inum };
 736
 737         size_t aligned_written;
 738         ret = write_aligned(c, inum, io_opts, aligned_buf,
 739                             align.size, align.start, link_len + 1,
 740                             &aligned_written);
 741         free(aligned_buf);
 742
 743         if (ret)
 744                 goto err;
 745
 746         size_t written = align_fix_up_bytes(&align, aligned_written);
 747         BUG_ON(written != link_len + 1); // TODO: handle short
 748
 749         ret = inode_update_times(c, inum);
 750         if (ret)
 751                 goto err;
 752
 753         new_inode.bi_size = written;
 754
 755         struct fuse_entry_param e = inode_to_entry(c, &new_inode);
 756         fuse_reply_entry(req, &e);
 757         return;
 758
 759 err:
 760         fuse_reply_err(req, -ret);
 761 }
 762
 763 static void bcachefs_fuse_readlink(fuse_req_t req, fuse_ino_t ino)
 764 {
 765         subvol_inum inum = map_root_ino(ino);
 766         struct bch_fs *c = fuse_req_userdata(req);
 767         char *buf = NULL;
 768
 769         fuse_log(FUSE_LOG_DEBUG, "bcachefs_fuse_readlink(%llu)\n", inum.inum);
 770
 771         struct bch_inode_unpacked bi;
 772         int ret = bch2_inode_find_by_inum(c, inum, &bi);
 773         if (ret)
 774                 goto err;
 775
 776         struct fuse_align_io align = align_io(c, bi.bi_size, 0);
 777
 778         ret = -ENOMEM;
 779         buf = aligned_alloc(PAGE_SIZE, align.size);
 780         if (!buf)
 781                 goto err;
 782
 783         ret = read_aligned(c, inum, align.size, align.start, buf);
 784         if (ret)
 785                 goto err;
 786
 787         BUG_ON(buf[align.size - 1] != 0);
 788
 789         fuse_reply_readlink(req, buf);
 790
 791 err:
 792         if (ret)
 793                 fuse_reply_err(req, -ret);
 794
 795         free(buf);
 796 }
 797
 798 #if 0
 799 /*
 800  * FUSE flush is essentially the close() call, however it is not guaranteed
 801  * that one flush happens per open/create.
 802  *
 803  * It doesn't have to do anything, and is mostly relevant for NFS-style
 804  * filesystems where close has some relationship to caching.
 805  */
 806 static void bcachefs_fuse_flush(fuse_req_t req, fuse_ino_t inum,
 807                                 struct fuse_file_info *fi)
 808 {
 809         struct bch_fs *c = fuse_req_userdata(req);
 810 }
 811
 812 static void bcachefs_fuse_release(fuse_req_t req, fuse_ino_t inum,
 813                                   struct fuse_file_info *fi)
 814 {
 815         struct bch_fs *c = fuse_req_userdata(req);
 816 }
 817
 818 static void bcachefs_fuse_fsync(fuse_req_t req, fuse_ino_t inum, int datasync,
 819                                 struct fuse_file_info *fi)
 820 {
 821         struct bch_fs *c = fuse_req_userdata(req);
 822 }
 823
 824 static void bcachefs_fuse_opendir(fuse_req_t req, fuse_ino_t inum,
 825                                   struct fuse_file_info *fi)
 826 {
 827         struct bch_fs *c = fuse_req_userdata(req);
 828 }
 829 #endif
 830
 831 struct fuse_dir_context {
 832         struct dir_context      ctx;
 833         fuse_req_t              req;
 834         char                    *buf;
 835         size_t                  bufsize;
 836 };
 837
 838 struct fuse_dirent {
 839         uint64_t        ino;
 840         uint64_t        off;
 841         uint32_t        namelen;
 842         uint32_t        type;
 843         char name[];
 844 };
 845
 846 #define FUSE_NAME_OFFSET offsetof(struct fuse_dirent, name)
 847 #define FUSE_DIRENT_ALIGN(x) \
 848         (((x) + sizeof(uint64_t) - 1) & ~(sizeof(uint64_t) - 1))
 849
 850 static size_t fuse_add_direntry2(char *buf, size_t bufsize,
 851                                  const char *name, int namelen,
 852                                  const struct stat *stbuf, off_t off)
 853 {
 854         size_t entlen           = FUSE_NAME_OFFSET + namelen;
 855         size_t entlen_padded    = FUSE_DIRENT_ALIGN(entlen);
 856         struct fuse_dirent *dirent = (struct fuse_dirent *) buf;
 857
 858         if ((buf == NULL) || (entlen_padded > bufsize))
 859                 return entlen_padded;
 860
 861         dirent->ino = stbuf->st_ino;
 862         dirent->off = off;
 863         dirent->namelen = namelen;
 864         dirent->type = (stbuf->st_mode & S_IFMT) >> 12;
 865         memcpy(dirent->name, name, namelen);
 866         memset(dirent->name + namelen, 0, entlen_padded - entlen);
 867
 868         return entlen_padded;
 869 }
 870
 871 static int fuse_filldir(struct dir_context *_ctx,
 872                         const char *name, int namelen,
 873                         loff_t pos, u64 ino, unsigned type)
 874 {
 875         struct fuse_dir_context *ctx =
 876                 container_of(_ctx, struct fuse_dir_context, ctx);
 877
 878         struct stat statbuf = {
 879                 .st_ino         = unmap_root_ino(ino),
 880                 .st_mode        = type << 12,
 881         };
 882
 883         fuse_log(FUSE_LOG_DEBUG, "fuse_filldir(name=%s inum=%llu pos=%llu)\n",
 884                  name, statbuf.st_ino, pos);
 885
 886         size_t len = fuse_add_direntry2(ctx->buf,
 887                                         ctx->bufsize,
 888                                         name,
 889                                         namelen,
 890                                         &statbuf,
 891                                         pos + 1);
 892
 893         if (len > ctx->bufsize)
 894                 return -1;
 895
 896         ctx->buf        += len;
 897         ctx->bufsize    -= len;
 898
 899         return 0;
 900 }
 901
 902 static bool handle_dots(struct fuse_dir_context *ctx, fuse_ino_t dir)
 903 {
 904         if (ctx->ctx.pos == 0) {
 905                 if (fuse_filldir(&ctx->ctx, ".", 1, ctx->ctx.pos,
 906                                  dir, DT_DIR) < 0)
 907                         return false;
 908                 ctx->ctx.pos = 1;
 909         }
 910
 911         if (ctx->ctx.pos == 1) {
 912                 if (fuse_filldir(&ctx->ctx, "..", 2, ctx->ctx.pos,
 913                                  /*TODO: parent*/ 1, DT_DIR) < 0)
 914                         return false;
 915                 ctx->ctx.pos = 2;
 916         }
 917
 918         return true;
 919 }
 920
 921 static void bcachefs_fuse_readdir(fuse_req_t req, fuse_ino_t dir_ino,
 922                                   size_t size, off_t off,
 923                                   struct fuse_file_info *fi)
 924 {
 925         subvol_inum dir = map_root_ino(dir_ino);
 926         struct bch_fs *c = fuse_req_userdata(req);
 927         struct bch_inode_unpacked bi;
 928         char *buf = calloc(size, 1);
 929         struct fuse_dir_context ctx = {
 930                 .ctx.actor      = fuse_filldir,
 931                 .ctx.pos        = off,
 932                 .req            = req,
 933                 .buf            = buf,
 934                 .bufsize        = size,
 935         };
 936         int ret = 0;
 937
 938         fuse_log(FUSE_LOG_DEBUG, "bcachefs_fuse_readdir(dir=%llu, size=%zu, "
 939                  "off=%lld)\n", dir.inum, size, off);
 940
 941         ret = bch2_inode_find_by_inum(c, dir, &bi);
 942         if (ret)
 943                 goto reply;
 944
 945         if (!S_ISDIR(bi.bi_mode)) {
 946                 ret = -ENOTDIR;
 947                 goto reply;
 948         }
 949
 950         if (!handle_dots(&ctx, dir.inum))
 951                 goto reply;
 952
 953         ret = bch2_readdir(c, dir, &ctx.ctx);
 954 reply:
 955         if (!ret) {
 956                 fuse_log(FUSE_LOG_DEBUG, "bcachefs_fuse_readdir reply %zd\n",
 957                                         ctx.buf - buf);
 958                 fuse_reply_buf(req, buf, ctx.buf - buf);
 959         } else {
 960                 fuse_reply_err(req, -ret);
 961         }
 962
 963         free(buf);
 964 }
 965
 966 #if 0
 967 static void bcachefs_fuse_readdirplus(fuse_req_t req, fuse_ino_t dir,
 968                                       size_t size, off_t off,
 969                                       struct fuse_file_info *fi)
 970 {
 971
 972 }
 973
 974 static void bcachefs_fuse_releasedir(fuse_req_t req, fuse_ino_t inum,
 975                                      struct fuse_file_info *fi)
 976 {
 977         struct bch_fs *c = fuse_req_userdata(req);
 978 }
 979
 980 static void bcachefs_fuse_fsyncdir(fuse_req_t req, fuse_ino_t inum, int datasync,
 981                                    struct fuse_file_info *fi)
 982 {
 983         struct bch_fs *c = fuse_req_userdata(req);
 984 }
 985 #endif
 986
 987 static void bcachefs_fuse_statfs(fuse_req_t req, fuse_ino_t inum)
 988 {
 989         struct bch_fs *c = fuse_req_userdata(req);
 990         struct bch_fs_usage_short usage = bch2_fs_usage_read_short(c);
 991         unsigned shift = c->block_bits;
 992         struct statvfs statbuf = {
 993                 .f_bsize        = block_bytes(c),
 994                 .f_frsize       = block_bytes(c),
 995                 .f_blocks       = usage.capacity >> shift,
 996                 .f_bfree        = (usage.capacity - usage.used) >> shift,
 997                 //.f_bavail     = statbuf.f_bfree,
 998                 .f_files        = usage.nr_inodes,
 999                 .f_ffree        = U64_MAX,
1000                 .f_namemax      = BCH_NAME_MAX,
1001         };
1002
1003         fuse_reply_statfs(req, &statbuf);
1004 }
1005
1006 #if 0
1007 static void bcachefs_fuse_setxattr(fuse_req_t req, fuse_ino_t inum,
1008                                    const char *name, const char *value,
1009                                    size_t size, int flags)
1010 {
1011         struct bch_fs *c = fuse_req_userdata(req);
1012 }
1013
1014 static void bcachefs_fuse_getxattr(fuse_req_t req, fuse_ino_t inum,
1015                                    const char *name, size_t size)
1016 {
1017         struct bch_fs *c = fuse_req_userdata(req);
1018
1019         fuse_reply_xattr(req, );
1020 }
1021
1022 static void bcachefs_fuse_listxattr(fuse_req_t req, fuse_ino_t inum, size_t size)
1023 {
1024         struct bch_fs *c = fuse_req_userdata(req);
1025 }
1026
1027 static void bcachefs_fuse_removexattr(fuse_req_t req, fuse_ino_t inum,
1028                                       const char *name)
1029 {
1030         struct bch_fs *c = fuse_req_userdata(req);
1031 }
1032 #endif
1033
1034 static void bcachefs_fuse_create(fuse_req_t req, fuse_ino_t dir_ino,
1035                                  const char *name, mode_t mode,
1036                                  struct fuse_file_info *fi)
1037 {
1038         subvol_inum dir = map_root_ino(dir_ino);
1039         struct bch_fs *c = fuse_req_userdata(req);
1040         struct bch_inode_unpacked new_inode;
1041         int ret;
1042
1043         fuse_log(FUSE_LOG_DEBUG, "bcachefs_fuse_create(%llu, %s, %x)\n",
1044                  dir.inum, name, mode);
1045
1046         ret = do_create(c, dir, name, mode, 0, &new_inode);
1047         if (ret)
1048                 goto err;
1049
1050         struct fuse_entry_param e = inode_to_entry(c, &new_inode);
1051         fuse_reply_create(req, &e, fi);
1052         return;
1053 err:
1054         fuse_reply_err(req, -ret);
1055 }
1056
1057 #if 0
1058 static void bcachefs_fuse_write_buf(fuse_req_t req, fuse_ino_t inum,
1059                                     struct fuse_bufvec *bufv, off_t off,
1060                                     struct fuse_file_info *fi)
1061 {
1062         struct bch_fs *c = fuse_req_userdata(req);
1063 }
1064
1065 static void bcachefs_fuse_fallocate(fuse_req_t req, fuse_ino_t inum, int mode,
1066                                     off_t offset, off_t length,
1067                                     struct fuse_file_info *fi)
1068 {
1069         struct bch_fs *c = fuse_req_userdata(req);
1070 }
1071 #endif
1072
1073 static const struct fuse_lowlevel_ops bcachefs_fuse_ops = {
1074         .init           = bcachefs_fuse_init,
1075         .destroy        = bcachefs_fuse_destroy,
1076         .lookup         = bcachefs_fuse_lookup,
1077         .getattr        = bcachefs_fuse_getattr,
1078         .setattr        = bcachefs_fuse_setattr,
1079         .readlink       = bcachefs_fuse_readlink,
1080         .mknod          = bcachefs_fuse_mknod,
1081         .mkdir          = bcachefs_fuse_mkdir,
1082         .unlink         = bcachefs_fuse_unlink,
1083         .rmdir          = bcachefs_fuse_rmdir,
1084         .symlink        = bcachefs_fuse_symlink,
1085         .rename         = bcachefs_fuse_rename,
1086         .link           = bcachefs_fuse_link,
1087         .open           = bcachefs_fuse_open,
1088         .read           = bcachefs_fuse_read,
1089         .write          = bcachefs_fuse_write,
1090         //.flush        = bcachefs_fuse_flush,
1091         //.release      = bcachefs_fuse_release,
1092         //.fsync        = bcachefs_fuse_fsync,
1093         //.opendir      = bcachefs_fuse_opendir,
1094         .readdir        = bcachefs_fuse_readdir,
1095         //.readdirplus  = bcachefs_fuse_readdirplus,
1096         //.releasedir   = bcachefs_fuse_releasedir,
1097         //.fsyncdir     = bcachefs_fuse_fsyncdir,
1098         .statfs         = bcachefs_fuse_statfs,
1099         //.setxattr     = bcachefs_fuse_setxattr,
1100         //.getxattr     = bcachefs_fuse_getxattr,
1101         //.listxattr    = bcachefs_fuse_listxattr,
1102         //.removexattr  = bcachefs_fuse_removexattr,
1103         .create         = bcachefs_fuse_create,
1104
1105         /* posix locks: */
1106 #if 0
1107         .getlk          = bcachefs_fuse_getlk,
1108         .setlk          = bcachefs_fuse_setlk,
1109 #endif
1110         //.write_buf    = bcachefs_fuse_write_buf,
1111         //.fallocate    = bcachefs_fuse_fallocate,
1112
1113 };
1114
1115 /*
1116  * Setup and command parsing.
1117  */
1118
1119 struct bf_context {
1120         char            *devices_str;
1121         char            **devices;
1122         int             nr_devices;
1123 };
1124
1125 static void bf_context_free(struct bf_context *ctx)
1126 {
1127         int i;
1128
1129         free(ctx->devices_str);
1130         for (i = 0; i < ctx->nr_devices; ++i)
1131                 free(ctx->devices[i]);
1132         free(ctx->devices);
1133 }
1134
1135 static struct fuse_opt bf_opts[] = {
1136         FUSE_OPT_END
1137 };
1138
1139 /*
1140  * Fuse option parsing helper -- returning 0 means we consumed the argument, 1
1141  * means we did not.
1142  */
1143 static int bf_opt_proc(void *data, const char *arg, int key,
1144     struct fuse_args *outargs)
1145 {
1146         struct bf_context *ctx = data;
1147
1148         switch (key) {
1149         case FUSE_OPT_KEY_NONOPT:
1150                 /* Just extract the first non-option string. */
1151                 if (!ctx->devices_str) {
1152                         ctx->devices_str = strdup(arg);
1153                         return 0;
1154                 }
1155                 return 1;
1156         }
1157
1158         return 1;
1159 }
1160
1161 /*
1162  * dev1:dev2 -> [ dev1, dev2 ]
1163  * dev       -> [ dev ]
1164  */
1165 static void tokenize_devices(struct bf_context *ctx)
1166 {
1167         char *devices_str = strdup(ctx->devices_str);
1168         char *devices_tmp = devices_str;
1169         char **devices = NULL;
1170         int nr = 0;
1171         char *dev = NULL;
1172
1173         while ((dev = strsep(&devices_tmp, ":"))) {
1174                 if (strlen(dev) > 0) {
1175                         devices = realloc(devices, (nr + 1) * sizeof *devices);
1176                         devices[nr] = strdup(dev);
1177                         nr++;
1178                 }
1179         }
1180
1181         if (!devices) {
1182                 devices = malloc(sizeof *devices);
1183                 devices[0] = strdup(ctx->devices_str);
1184                 nr = 1;
1185         }
1186
1187         ctx->devices = devices;
1188         ctx->nr_devices = nr;
1189
1190         free(devices_str);
1191 }
1192
1193 static void usage(char *argv[])
1194 {
1195         printf("Usage: %s fusemount [options] <dev>[:dev2:...] <mountpoint>\n",
1196                argv[0]);
1197         printf("\n");
1198 }
1199
1200 int cmd_fusemount(int argc, char *argv[])
1201 {
1202         struct fuse_args args = FUSE_ARGS_INIT(argc, argv);
1203         struct bch_opts bch_opts = bch2_opts_empty();
1204         struct bf_context ctx = { 0 };
1205         struct bch_fs *c = NULL;
1206         int ret = 0, i;
1207
1208         /* Parse arguments. */
1209         if (fuse_opt_parse(&args, &ctx, bf_opts, bf_opt_proc) < 0)
1210                 die("fuse_opt_parse err: %m");
1211
1212         struct fuse_cmdline_opts fuse_opts;
1213         if (fuse_parse_cmdline(&args, &fuse_opts) < 0)
1214                 die("fuse_parse_cmdline err: %m");
1215
1216         if (fuse_opts.show_help) {
1217                 usage(argv);
1218                 fuse_cmdline_help();
1219                 fuse_lowlevel_help();
1220                 ret = 0;
1221                 goto out;
1222         }
1223         if (fuse_opts.show_version) {
1224                 /* TODO: Show bcachefs version. */
1225                 printf("FUSE library version %s\n", fuse_pkgversion());
1226                 fuse_lowlevel_version();
1227                 ret = 0;
1228                 goto out;
1229         }
1230         if (!fuse_opts.mountpoint) {
1231                 usage(argv);
1232                 printf("Please supply a mountpoint.\n");
1233                 ret = 1;
1234                 goto out;
1235         }
1236         if (!ctx.devices_str) {
1237                 usage(argv);
1238                 printf("Please specify a device or device1:device2:...\n");
1239                 ret = 1;
1240                 goto out;
1241         }
1242         tokenize_devices(&ctx);
1243
1244         struct printbuf fsname = PRINTBUF;
1245         prt_printf(&fsname, "fsname=");
1246         for (i = 0; i < ctx.nr_devices; ++i) {
1247                 if (i)
1248                         prt_str(&fsname, ":");
1249                 prt_str(&fsname, ctx.devices[i]);
1250         }
1251
1252         fuse_opt_add_arg(&args, "-o");
1253         fuse_opt_add_arg(&args, fsname.buf);
1254
1255         /* Open bch */
1256         printf("Opening bcachefs filesystem on:\n");
1257         for (i = 0; i < ctx.nr_devices; ++i)
1258                 printf("\t%s\n", ctx.devices[i]);
1259
1260         c = bch2_fs_open(ctx.devices, ctx.nr_devices, bch_opts);
1261         if (IS_ERR(c))
1262                 die("error opening %s: %s", ctx.devices_str,
1263                     bch2_err_str(PTR_ERR(c)));
1264
1265         /* Fuse */
1266         struct fuse_session *se =
1267                 fuse_session_new(&args, &bcachefs_fuse_ops,
1268                                  sizeof(bcachefs_fuse_ops), c);
1269         if (!se)
1270                 die("fuse_lowlevel_new err: %m");
1271
1272         if (fuse_set_signal_handlers(se) < 0)
1273                 die("fuse_set_signal_handlers err: %m");
1274
1275         if (fuse_session_mount(se, fuse_opts.mountpoint))
1276                 die("fuse_mount err: %m");
1277
1278         /* This print statement is a trigger for tests. */
1279         printf("Fuse mount initialized.\n");
1280
1281         if (fuse_opts.foreground == 0){
1282                 printf("Fuse forcing to foreground mode, due gcc constructors usage.\n");
1283                 fuse_opts.foreground = 1;
1284         }
1285
1286         fuse_daemonize(fuse_opts.foreground);
1287
1288         ret = fuse_session_loop(se);
1289
1290         /* Cleanup */
1291         fuse_session_unmount(se);
1292         fuse_remove_signal_handlers(se);
1293         fuse_session_destroy(se);
1294
1295 out:
1296         free(fuse_opts.mountpoint);
1297         fuse_opt_free_args(&args);
1298         bf_context_free(&ctx);
1299
1300         return ret ? 1 : 0;
1301 }
1302
1303 #endif /* BCACHEFS_FUSE */