7 #include <sys/statvfs.h>
9 #include <fuse_lowlevel.h>
12 #include "libbcachefs.h"
13 #include "tools-util.h"
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/error.h"
21 #include "libbcachefs/fs-common.h"
22 #include "libbcachefs/inode.h"
23 #include "libbcachefs/io.h"
24 #include "libbcachefs/opts.h"
25 #include "libbcachefs/super.h"
28 #include "libbcachefs/fs.h"
30 #include <linux/dcache.h>
32 /* XXX cut and pasted from fsck.c */
33 #define QSTR(n) { { { .len = strlen(n) } }, .name = n }
35 static inline u64 map_root_ino(u64 ino)
37 return ino == 1 ? 4096 : ino;
40 static inline u64 unmap_root_ino(u64 ino)
42 return ino == 4096 ? 1 : ino;
45 static struct stat inode_to_stat(struct bch_fs *c,
46 struct bch_inode_unpacked *bi)
48 return (struct stat) {
49 .st_ino = unmap_root_ino(bi->bi_inum),
50 .st_size = bi->bi_size,
51 .st_mode = bi->bi_mode,
54 .st_nlink = bch2_inode_nlink_get(bi),
55 .st_rdev = bi->bi_dev,
56 .st_blksize = block_bytes(c),
57 .st_blocks = bi->bi_sectors,
58 .st_atim = bch2_time_to_timespec(c, bi->bi_atime),
59 .st_mtim = bch2_time_to_timespec(c, bi->bi_mtime),
60 .st_ctim = bch2_time_to_timespec(c, bi->bi_ctime),
64 static struct fuse_entry_param inode_to_entry(struct bch_fs *c,
65 struct bch_inode_unpacked *bi)
67 return (struct fuse_entry_param) {
68 .ino = unmap_root_ino(bi->bi_inum),
69 .generation = bi->bi_generation,
70 .attr = inode_to_stat(c, bi),
71 .attr_timeout = DBL_MAX,
72 .entry_timeout = DBL_MAX,
76 static void bcachefs_fuse_init(void *arg, struct fuse_conn_info *conn)
78 if (conn->capable & FUSE_CAP_WRITEBACK_CACHE) {
79 fuse_log(FUSE_LOG_DEBUG, "fuse_init: activating writeback\n");
80 conn->want |= FUSE_CAP_WRITEBACK_CACHE;
82 fuse_log(FUSE_LOG_DEBUG, "fuse_init: writeback not capable\n");
84 //conn->want |= FUSE_CAP_POSIX_ACL;
87 static void bcachefs_fuse_destroy(void *arg)
89 struct bch_fs *c = arg;
94 static void bcachefs_fuse_lookup(fuse_req_t req, fuse_ino_t dir,
97 struct bch_fs *c = fuse_req_userdata(req);
98 struct bch_inode_unpacked bi;
99 struct qstr qstr = QSTR(name);
103 fuse_log(FUSE_LOG_DEBUG, "fuse_lookup(dir=%llu name=%s)\n",
106 dir = map_root_ino(dir);
108 ret = bch2_inode_find_by_inum(c, dir, &bi);
110 fuse_reply_err(req, -ret);
114 struct bch_hash_info hash_info = bch2_hash_info_init(c, &bi);
116 inum = bch2_dirent_lookup(c, dir, &hash_info, &qstr);
118 struct fuse_entry_param e = {
119 .attr_timeout = DBL_MAX,
120 .entry_timeout = DBL_MAX,
122 fuse_reply_entry(req, &e);
126 ret = bch2_inode_find_by_inum(c, inum, &bi);
130 fuse_log(FUSE_LOG_DEBUG, "fuse_lookup ret(inum=%llu)\n",
133 struct fuse_entry_param e = inode_to_entry(c, &bi);
134 fuse_reply_entry(req, &e);
137 fuse_log(FUSE_LOG_DEBUG, "fuse_lookup error %i\n", ret);
138 fuse_reply_err(req, -ret);
141 static void bcachefs_fuse_getattr(fuse_req_t req, fuse_ino_t inum,
142 struct fuse_file_info *fi)
144 struct bch_fs *c = fuse_req_userdata(req);
145 struct bch_inode_unpacked bi;
149 fuse_log(FUSE_LOG_DEBUG, "fuse_getattr(inum=%llu)\n",
152 inum = map_root_ino(inum);
154 ret = bch2_inode_find_by_inum(c, inum, &bi);
156 fuse_log(FUSE_LOG_DEBUG, "fuse_getattr error %i\n", ret);
157 fuse_reply_err(req, -ret);
161 fuse_log(FUSE_LOG_DEBUG, "fuse_getattr success\n");
163 attr = inode_to_stat(c, &bi);
164 fuse_reply_attr(req, &attr, DBL_MAX);
167 static void bcachefs_fuse_setattr(fuse_req_t req, fuse_ino_t inum,
168 struct stat *attr, int to_set,
169 struct fuse_file_info *fi)
171 struct bch_fs *c = fuse_req_userdata(req);
172 struct bch_inode_unpacked inode_u;
173 struct btree_trans trans;
174 struct btree_iter iter;
178 fuse_log(FUSE_LOG_DEBUG, "bcachefs_fuse_setattr(%llu, %x)\n",
181 inum = map_root_ino(inum);
183 bch2_trans_init(&trans, c, 0, 0);
185 bch2_trans_begin(&trans);
186 now = bch2_current_time(c);
188 ret = bch2_inode_peek(&trans, &iter, &inode_u, inum, BTREE_ITER_INTENT);
192 if (to_set & FUSE_SET_ATTR_MODE)
193 inode_u.bi_mode = attr->st_mode;
194 if (to_set & FUSE_SET_ATTR_UID)
195 inode_u.bi_uid = attr->st_uid;
196 if (to_set & FUSE_SET_ATTR_GID)
197 inode_u.bi_gid = attr->st_gid;
198 if (to_set & FUSE_SET_ATTR_SIZE)
199 inode_u.bi_size = attr->st_size;
200 if (to_set & FUSE_SET_ATTR_ATIME)
201 inode_u.bi_atime = timespec_to_bch2_time(c, attr->st_atim);
202 if (to_set & FUSE_SET_ATTR_MTIME)
203 inode_u.bi_mtime = timespec_to_bch2_time(c, attr->st_mtim);
204 if (to_set & FUSE_SET_ATTR_ATIME_NOW)
205 inode_u.bi_atime = now;
206 if (to_set & FUSE_SET_ATTR_MTIME_NOW)
207 inode_u.bi_mtime = now;
210 ret = bch2_inode_write(&trans, &iter, &inode_u) ?:
211 bch2_trans_commit(&trans, NULL, NULL,
212 BTREE_INSERT_NOFAIL);
214 bch2_trans_iter_exit(&trans, &iter);
218 bch2_trans_exit(&trans);
221 *attr = inode_to_stat(c, &inode_u);
222 fuse_reply_attr(req, attr, DBL_MAX);
224 fuse_reply_err(req, -ret);
228 static int do_create(struct bch_fs *c, u64 dir,
229 const char *name, mode_t mode, dev_t rdev,
230 struct bch_inode_unpacked *new_inode)
232 struct qstr qstr = QSTR(name);
233 struct bch_inode_unpacked dir_u;
235 dir = map_root_ino(dir);
237 bch2_inode_init_early(c, new_inode);
239 return bch2_trans_do(c, NULL, NULL, 0,
240 bch2_create_trans(&trans,
243 0, 0, mode, rdev, NULL, NULL));
246 static void bcachefs_fuse_mknod(fuse_req_t req, fuse_ino_t dir,
247 const char *name, mode_t mode,
250 struct bch_fs *c = fuse_req_userdata(req);
251 struct bch_inode_unpacked new_inode;
254 fuse_log(FUSE_LOG_DEBUG, "bcachefs_fuse_mknod(%llu, %s, %x, %x)\n",
255 dir, name, mode, rdev);
256 ret = do_create(c, dir, name, mode, rdev, &new_inode);
260 struct fuse_entry_param e = inode_to_entry(c, &new_inode);
261 fuse_reply_entry(req, &e);
264 fuse_reply_err(req, -ret);
267 static void bcachefs_fuse_mkdir(fuse_req_t req, fuse_ino_t dir,
268 const char *name, mode_t mode)
270 fuse_log(FUSE_LOG_DEBUG, "bcachefs_fuse_mkdir(%llu, %s, %x)\n",
273 BUG_ON(mode & S_IFMT);
276 bcachefs_fuse_mknod(req, dir, name, mode, 0);
279 static void bcachefs_fuse_unlink(fuse_req_t req, fuse_ino_t dir,
282 struct bch_fs *c = fuse_req_userdata(req);
283 struct bch_inode_unpacked dir_u, inode_u;
284 struct qstr qstr = QSTR(name);
287 fuse_log(FUSE_LOG_DEBUG, "bcachefs_fuse_unlink(%llu, %s)\n", dir, name);
289 dir = map_root_ino(dir);
291 ret = bch2_trans_do(c, NULL, NULL, BTREE_INSERT_NOFAIL,
292 bch2_unlink_trans(&trans, dir, &dir_u,
295 fuse_reply_err(req, -ret);
298 static void bcachefs_fuse_rmdir(fuse_req_t req, fuse_ino_t dir,
301 fuse_log(FUSE_LOG_DEBUG, "bcachefs_fuse_rmdir(%llu, %s)\n", dir, name);
303 dir = map_root_ino(dir);
305 bcachefs_fuse_unlink(req, dir, name);
308 static void bcachefs_fuse_rename(fuse_req_t req,
309 fuse_ino_t src_dir, const char *srcname,
310 fuse_ino_t dst_dir, const char *dstname,
313 struct bch_fs *c = fuse_req_userdata(req);
314 struct bch_inode_unpacked dst_dir_u, src_dir_u;
315 struct bch_inode_unpacked src_inode_u, dst_inode_u;
316 struct qstr dst_name = QSTR(srcname);
317 struct qstr src_name = QSTR(dstname);
320 fuse_log(FUSE_LOG_DEBUG,
321 "bcachefs_fuse_rename(%llu, %s, %llu, %s, %x)\n",
322 src_dir, srcname, dst_dir, dstname, flags);
324 src_dir = map_root_ino(src_dir);
325 dst_dir = map_root_ino(dst_dir);
327 /* XXX handle overwrites */
328 ret = bch2_trans_do(c, NULL, NULL, 0,
329 bch2_rename_trans(&trans,
332 &src_inode_u, &dst_inode_u,
333 &src_name, &dst_name,
336 fuse_reply_err(req, -ret);
339 static void bcachefs_fuse_link(fuse_req_t req, fuse_ino_t inum,
340 fuse_ino_t newparent, const char *newname)
342 struct bch_fs *c = fuse_req_userdata(req);
343 struct bch_inode_unpacked dir_u, inode_u;
344 struct qstr qstr = QSTR(newname);
347 fuse_log(FUSE_LOG_DEBUG, "bcachefs_fuse_link(%llu, %llu, %s)\n",
348 inum, newparent, newname);
350 newparent = map_root_ino(newparent);
352 ret = bch2_trans_do(c, NULL, NULL, 0,
353 bch2_link_trans(&trans, newparent,
354 inum, &dir_u, &inode_u, &qstr));
357 struct fuse_entry_param e = inode_to_entry(c, &inode_u);
358 fuse_reply_entry(req, &e);
360 fuse_reply_err(req, -ret);
364 static void bcachefs_fuse_open(fuse_req_t req, fuse_ino_t inum,
365 struct fuse_file_info *fi)
367 fi->direct_io = false;
368 fi->keep_cache = true;
369 fi->cache_readdir = true;
371 fuse_reply_open(req, fi);
374 static void userbio_init(struct bio *bio, struct bio_vec *bv,
375 void *buf, size_t size)
377 bio_init(bio, bv, 1);
378 bio->bi_iter.bi_size = size;
384 static int get_inode_io_opts(struct bch_fs *c, u64 inum,
385 struct bch_io_opts *opts)
387 struct bch_inode_unpacked inode;
388 if (bch2_inode_find_by_inum(c, inum, &inode))
391 *opts = bch2_opts_to_inode_opts(c->opts);
392 bch2_io_opts_apply(opts, bch2_inode_opts_get(&inode));
396 static void bcachefs_fuse_read_endio(struct bio *bio)
398 closure_put(bio->bi_private);
401 struct fuse_align_io {
409 /* Handle unaligned start and end */
410 /* TODO: align to block_bytes, sector size, or page size? */
411 static struct fuse_align_io align_io(const struct bch_fs *c, size_t size,
414 struct fuse_align_io align;
418 align.start = round_down(offset, block_bytes(c));
419 align.pad_start = offset - align.start;
421 off_t end = offset + size;
422 align.end = round_up(end, block_bytes(c));
423 align.pad_end = align.end - end;
425 align.size = align.end - align.start;
431 * Given an aligned number of bytes transferred, figure out how many unaligned
432 * bytes were transferred.
434 static size_t align_fix_up_bytes(const struct fuse_align_io *align,
439 if (align_bytes > align->pad_start) {
440 bytes = align_bytes - align->pad_start;
441 bytes = bytes > align->pad_end ? bytes - align->pad_end : 0;
450 static int read_aligned(struct bch_fs *c, fuse_ino_t inum, size_t aligned_size,
451 off_t aligned_offset, void *buf)
453 BUG_ON(aligned_size & (block_bytes(c) - 1));
454 BUG_ON(aligned_offset & (block_bytes(c) - 1));
456 struct bch_io_opts io_opts;
457 if (get_inode_io_opts(c, inum, &io_opts))
460 struct bch_read_bio rbio;
462 userbio_init(&rbio.bio, &bv, buf, aligned_size);
463 bio_set_op_attrs(&rbio.bio, REQ_OP_READ, REQ_SYNC);
464 rbio.bio.bi_iter.bi_sector = aligned_offset >> 9;
467 closure_init_stack(&cl);
470 rbio.bio.bi_end_io = bcachefs_fuse_read_endio;
471 rbio.bio.bi_private = &cl;
473 bch2_read(c, rbio_init(&rbio.bio, io_opts), inum);
477 return -blk_status_to_errno(rbio.bio.bi_status);
480 static void bcachefs_fuse_read(fuse_req_t req, fuse_ino_t inum,
481 size_t size, off_t offset,
482 struct fuse_file_info *fi)
484 struct bch_fs *c = fuse_req_userdata(req);
486 fuse_log(FUSE_LOG_DEBUG, "bcachefs_fuse_read(%llu, %zd, %lld)\n",
489 /* Check inode size. */
490 struct bch_inode_unpacked bi;
491 int ret = bch2_inode_find_by_inum(c, inum, &bi);
493 fuse_reply_err(req, -ret);
497 off_t end = min_t(u64, bi.bi_size, offset + size);
499 fuse_reply_buf(req, NULL, 0);
504 struct fuse_align_io align = align_io(c, size, offset);
506 void *buf = aligned_alloc(PAGE_SIZE, align.size);
508 fuse_reply_err(req, ENOMEM);
512 ret = read_aligned(c, inum, align.size, align.start, buf);
515 fuse_reply_buf(req, buf + align.pad_start, size);
517 fuse_reply_err(req, -ret);
522 static int inode_update_times(struct bch_fs *c, fuse_ino_t inum)
524 struct btree_trans trans;
525 struct btree_iter iter;
526 struct bch_inode_unpacked inode_u;
530 bch2_trans_init(&trans, c, 0, 0);
532 bch2_trans_begin(&trans);
533 now = bch2_current_time(c);
535 ret = bch2_inode_peek(&trans, &iter, &inode_u, inum, BTREE_ITER_INTENT);
539 inode_u.bi_mtime = now;
540 inode_u.bi_ctime = now;
542 ret = bch2_inode_write(&trans, &iter, &inode_u);
546 ret = bch2_trans_commit(&trans, NULL, NULL,
547 BTREE_INSERT_NOFAIL);
550 bch2_trans_iter_exit(&trans, &iter);
554 bch2_trans_exit(&trans);
558 static int write_aligned(struct bch_fs *c, fuse_ino_t inum,
559 struct bch_io_opts io_opts, void *buf,
560 size_t aligned_size, off_t aligned_offset,
561 off_t new_i_size, size_t *written_out)
563 struct bch_write_op op = { 0 };
567 BUG_ON(aligned_size & (block_bytes(c) - 1));
568 BUG_ON(aligned_offset & (block_bytes(c) - 1));
572 closure_init_stack(&cl);
574 bch2_write_op_init(&op, c, io_opts); /* XXX reads from op?! */
575 op.write_point = writepoint_hashed(0);
576 op.nr_replicas = io_opts.data_replicas;
577 op.target = io_opts.foreground_target;
578 op.pos = POS(inum, aligned_offset >> 9);
579 op.new_i_size = new_i_size;
581 userbio_init(&op.wbio.bio, &bv, buf, aligned_size);
582 bio_set_op_attrs(&op.wbio.bio, REQ_OP_WRITE, REQ_SYNC);
584 if (bch2_disk_reservation_get(c, &op.res, aligned_size >> 9,
585 op.nr_replicas, 0)) {
586 /* XXX: use check_range_allocated like dio write path */
590 closure_call(&op.cl, bch2_write, NULL, &cl);
594 *written_out = op.written << 9;
599 static void bcachefs_fuse_write(fuse_req_t req, fuse_ino_t inum,
600 const char *buf, size_t size,
602 struct fuse_file_info *fi)
604 struct bch_fs *c = fuse_req_userdata(req);
605 struct bch_io_opts io_opts;
606 size_t aligned_written;
609 fuse_log(FUSE_LOG_DEBUG, "bcachefs_fuse_write(%llu, %zd, %lld)\n",
612 struct fuse_align_io align = align_io(c, size, offset);
613 void *aligned_buf = aligned_alloc(PAGE_SIZE, align.size);
614 BUG_ON(!aligned_buf);
616 if (get_inode_io_opts(c, inum, &io_opts)) {
621 /* Realign the data and read in start and end, if needed */
623 /* Read partial start data. */
624 if (align.pad_start) {
625 memset(aligned_buf, 0, block_bytes(c));
627 ret = read_aligned(c, inum, block_bytes(c), align.start,
634 * Read partial end data. If the whole write fits in one block, the
635 * start data and the end data are the same so this isn't needed.
638 !(align.pad_start && align.size == block_bytes(c))) {
639 off_t partial_end_start = align.end - block_bytes(c);
640 size_t buf_offset = align.size - block_bytes(c);
642 memset(aligned_buf + buf_offset, 0, block_bytes(c));
644 ret = read_aligned(c, inum, block_bytes(c), partial_end_start,
645 aligned_buf + buf_offset);
650 /* Overlay what we want to write. */
651 memcpy(aligned_buf + align.pad_start, buf, size);
653 /* Actually write. */
654 ret = write_aligned(c, inum, io_opts, aligned_buf,
655 align.size, align.start,
656 offset + size, &aligned_written);
658 /* Figure out how many unaligned bytes were written. */
659 size_t written = align_fix_up_bytes(&align, aligned_written);
660 BUG_ON(written > size);
662 fuse_log(FUSE_LOG_DEBUG, "bcachefs_fuse_write: wrote %zd bytes\n",
669 * Update inode times.
670 * TODO: Integrate with bch2_extent_update()
673 ret = inode_update_times(c, inum);
676 BUG_ON(written == 0);
677 fuse_reply_write(req, written);
683 fuse_reply_err(req, -ret);
687 static void bcachefs_fuse_symlink(fuse_req_t req, const char *link,
688 fuse_ino_t dir, const char *name)
690 struct bch_fs *c = fuse_req_userdata(req);
691 struct bch_inode_unpacked new_inode;
692 size_t link_len = strlen(link);
695 fuse_log(FUSE_LOG_DEBUG, "bcachefs_fuse_symlink(%s, %llu, %s)\n",
698 dir = map_root_ino(dir);
700 ret = do_create(c, dir, name, S_IFLNK|S_IRWXUGO, 0, &new_inode);
704 struct bch_io_opts io_opts;
705 ret = get_inode_io_opts(c, new_inode.bi_inum, &io_opts);
709 struct fuse_align_io align = align_io(c, link_len + 1, 0);
711 void *aligned_buf = aligned_alloc(PAGE_SIZE, align.size);
712 BUG_ON(!aligned_buf);
714 memset(aligned_buf, 0, align.size);
715 memcpy(aligned_buf, link, link_len); /* already terminated */
717 size_t aligned_written;
718 ret = write_aligned(c, new_inode.bi_inum, io_opts, aligned_buf,
719 align.size, align.start, link_len + 1,
726 size_t written = align_fix_up_bytes(&align, aligned_written);
727 BUG_ON(written != link_len + 1); // TODO: handle short
729 ret = inode_update_times(c, new_inode.bi_inum);
733 new_inode.bi_size = written;
735 struct fuse_entry_param e = inode_to_entry(c, &new_inode);
736 fuse_reply_entry(req, &e);
740 fuse_reply_err(req, -ret);
743 static void bcachefs_fuse_readlink(fuse_req_t req, fuse_ino_t inum)
745 struct bch_fs *c = fuse_req_userdata(req);
748 fuse_log(FUSE_LOG_DEBUG, "bcachefs_fuse_readlink(%llu)\n", inum);
750 struct bch_inode_unpacked bi;
751 int ret = bch2_inode_find_by_inum(c, inum, &bi);
755 struct fuse_align_io align = align_io(c, bi.bi_size, 0);
758 buf = aligned_alloc(PAGE_SIZE, align.size);
762 ret = read_aligned(c, inum, align.size, align.start, buf);
766 BUG_ON(buf[align.size - 1] != 0);
768 fuse_reply_readlink(req, buf);
772 fuse_reply_err(req, -ret);
779 * FUSE flush is essentially the close() call, however it is not guaranteed
780 * that one flush happens per open/create.
782 * It doesn't have to do anything, and is mostly relevant for NFS-style
783 * filesystems where close has some relationship to caching.
785 static void bcachefs_fuse_flush(fuse_req_t req, fuse_ino_t inum,
786 struct fuse_file_info *fi)
788 struct bch_fs *c = fuse_req_userdata(req);
791 static void bcachefs_fuse_release(fuse_req_t req, fuse_ino_t inum,
792 struct fuse_file_info *fi)
794 struct bch_fs *c = fuse_req_userdata(req);
797 static void bcachefs_fuse_fsync(fuse_req_t req, fuse_ino_t inum, int datasync,
798 struct fuse_file_info *fi)
800 struct bch_fs *c = fuse_req_userdata(req);
803 static void bcachefs_fuse_opendir(fuse_req_t req, fuse_ino_t inum,
804 struct fuse_file_info *fi)
806 struct bch_fs *c = fuse_req_userdata(req);
810 struct fuse_dir_context {
811 struct dir_context ctx;
825 #define FUSE_NAME_OFFSET offsetof(struct fuse_dirent, name)
826 #define FUSE_DIRENT_ALIGN(x) \
827 (((x) + sizeof(uint64_t) - 1) & ~(sizeof(uint64_t) - 1))
829 static size_t fuse_add_direntry2(char *buf, size_t bufsize,
830 const char *name, int namelen,
831 const struct stat *stbuf, off_t off)
833 size_t entlen = FUSE_NAME_OFFSET + namelen;
834 size_t entlen_padded = FUSE_DIRENT_ALIGN(entlen);
835 struct fuse_dirent *dirent = (struct fuse_dirent *) buf;
837 if ((buf == NULL) || (entlen_padded > bufsize))
838 return entlen_padded;
840 dirent->ino = stbuf->st_ino;
842 dirent->namelen = namelen;
843 dirent->type = (stbuf->st_mode & S_IFMT) >> 12;
844 memcpy(dirent->name, name, namelen);
845 memset(dirent->name + namelen, 0, entlen_padded - entlen);
847 return entlen_padded;
850 static int fuse_filldir(struct dir_context *_ctx,
851 const char *name, int namelen,
852 loff_t pos, u64 ino, unsigned type)
854 struct fuse_dir_context *ctx =
855 container_of(_ctx, struct fuse_dir_context, ctx);
857 struct stat statbuf = {
858 .st_ino = unmap_root_ino(ino),
859 .st_mode = type << 12,
862 fuse_log(FUSE_LOG_DEBUG, "fuse_filldir(name=%s inum=%llu pos=%llu)\n",
863 name, statbuf.st_ino, pos);
865 size_t len = fuse_add_direntry2(ctx->buf,
872 if (len > ctx->bufsize)
881 static bool handle_dots(struct fuse_dir_context *ctx, fuse_ino_t dir)
883 if (ctx->ctx.pos == 0) {
884 if (fuse_filldir(&ctx->ctx, ".", 1, ctx->ctx.pos,
890 if (ctx->ctx.pos == 1) {
891 if (fuse_filldir(&ctx->ctx, "..", 2, ctx->ctx.pos,
892 /*TODO: parent*/ 1, DT_DIR) < 0)
900 static void bcachefs_fuse_readdir(fuse_req_t req, fuse_ino_t dir,
901 size_t size, off_t off,
902 struct fuse_file_info *fi)
904 struct bch_fs *c = fuse_req_userdata(req);
905 struct bch_inode_unpacked bi;
906 char *buf = calloc(size, 1);
907 struct fuse_dir_context ctx = {
908 .ctx.actor = fuse_filldir,
916 fuse_log(FUSE_LOG_DEBUG, "bcachefs_fuse_readdir(dir=%llu, size=%zu, "
917 "off=%lld)\n", dir, size, off);
919 dir = map_root_ino(dir);
921 ret = bch2_inode_find_by_inum(c, dir, &bi);
925 if (!S_ISDIR(bi.bi_mode)) {
930 if (!handle_dots(&ctx, dir))
933 ret = bch2_readdir(c, dir, &ctx.ctx);
936 fuse_log(FUSE_LOG_DEBUG, "bcachefs_fuse_readdir reply %zd\n",
938 fuse_reply_buf(req, buf, ctx.buf - buf);
940 fuse_reply_err(req, -ret);
947 static void bcachefs_fuse_readdirplus(fuse_req_t req, fuse_ino_t dir,
948 size_t size, off_t off,
949 struct fuse_file_info *fi)
954 static void bcachefs_fuse_releasedir(fuse_req_t req, fuse_ino_t inum,
955 struct fuse_file_info *fi)
957 struct bch_fs *c = fuse_req_userdata(req);
960 static void bcachefs_fuse_fsyncdir(fuse_req_t req, fuse_ino_t inum, int datasync,
961 struct fuse_file_info *fi)
963 struct bch_fs *c = fuse_req_userdata(req);
967 static void bcachefs_fuse_statfs(fuse_req_t req, fuse_ino_t inum)
969 struct bch_fs *c = fuse_req_userdata(req);
970 struct bch_fs_usage_short usage = bch2_fs_usage_read_short(c);
971 unsigned shift = c->block_bits;
972 struct statvfs statbuf = {
973 .f_bsize = block_bytes(c),
974 .f_frsize = block_bytes(c),
975 .f_blocks = usage.capacity >> shift,
976 .f_bfree = (usage.capacity - usage.used) >> shift,
977 //.f_bavail = statbuf.f_bfree,
978 .f_files = usage.nr_inodes,
980 .f_namemax = BCH_NAME_MAX,
983 fuse_reply_statfs(req, &statbuf);
987 static void bcachefs_fuse_setxattr(fuse_req_t req, fuse_ino_t inum,
988 const char *name, const char *value,
989 size_t size, int flags)
991 struct bch_fs *c = fuse_req_userdata(req);
994 static void bcachefs_fuse_getxattr(fuse_req_t req, fuse_ino_t inum,
995 const char *name, size_t size)
997 struct bch_fs *c = fuse_req_userdata(req);
999 fuse_reply_xattr(req, );
1002 static void bcachefs_fuse_listxattr(fuse_req_t req, fuse_ino_t inum, size_t size)
1004 struct bch_fs *c = fuse_req_userdata(req);
1007 static void bcachefs_fuse_removexattr(fuse_req_t req, fuse_ino_t inum,
1010 struct bch_fs *c = fuse_req_userdata(req);
1014 static void bcachefs_fuse_create(fuse_req_t req, fuse_ino_t dir,
1015 const char *name, mode_t mode,
1016 struct fuse_file_info *fi)
1018 struct bch_fs *c = fuse_req_userdata(req);
1019 struct bch_inode_unpacked new_inode;
1022 fuse_log(FUSE_LOG_DEBUG, "bcachefs_fuse_create(%llu, %s, %x)\n",
1025 ret = do_create(c, dir, name, mode, 0, &new_inode);
1029 struct fuse_entry_param e = inode_to_entry(c, &new_inode);
1030 fuse_reply_create(req, &e, fi);
1033 fuse_reply_err(req, -ret);
1038 static void bcachefs_fuse_write_buf(fuse_req_t req, fuse_ino_t inum,
1039 struct fuse_bufvec *bufv, off_t off,
1040 struct fuse_file_info *fi)
1042 struct bch_fs *c = fuse_req_userdata(req);
1045 static void bcachefs_fuse_fallocate(fuse_req_t req, fuse_ino_t inum, int mode,
1046 off_t offset, off_t length,
1047 struct fuse_file_info *fi)
1049 struct bch_fs *c = fuse_req_userdata(req);
1053 static const struct fuse_lowlevel_ops bcachefs_fuse_ops = {
1054 .init = bcachefs_fuse_init,
1055 .destroy = bcachefs_fuse_destroy,
1056 .lookup = bcachefs_fuse_lookup,
1057 .getattr = bcachefs_fuse_getattr,
1058 .setattr = bcachefs_fuse_setattr,
1059 .readlink = bcachefs_fuse_readlink,
1060 .mknod = bcachefs_fuse_mknod,
1061 .mkdir = bcachefs_fuse_mkdir,
1062 .unlink = bcachefs_fuse_unlink,
1063 .rmdir = bcachefs_fuse_rmdir,
1064 .symlink = bcachefs_fuse_symlink,
1065 .rename = bcachefs_fuse_rename,
1066 .link = bcachefs_fuse_link,
1067 .open = bcachefs_fuse_open,
1068 .read = bcachefs_fuse_read,
1069 .write = bcachefs_fuse_write,
1070 //.flush = bcachefs_fuse_flush,
1071 //.release = bcachefs_fuse_release,
1072 //.fsync = bcachefs_fuse_fsync,
1073 //.opendir = bcachefs_fuse_opendir,
1074 .readdir = bcachefs_fuse_readdir,
1075 //.readdirplus = bcachefs_fuse_readdirplus,
1076 //.releasedir = bcachefs_fuse_releasedir,
1077 //.fsyncdir = bcachefs_fuse_fsyncdir,
1078 .statfs = bcachefs_fuse_statfs,
1079 //.setxattr = bcachefs_fuse_setxattr,
1080 //.getxattr = bcachefs_fuse_getxattr,
1081 //.listxattr = bcachefs_fuse_listxattr,
1082 //.removexattr = bcachefs_fuse_removexattr,
1083 .create = bcachefs_fuse_create,
1087 .getlk = bcachefs_fuse_getlk,
1088 .setlk = bcachefs_fuse_setlk,
1090 //.write_buf = bcachefs_fuse_write_buf,
1091 //.fallocate = bcachefs_fuse_fallocate,
1096 * Setup and command parsing.
1105 static void bf_context_free(struct bf_context *ctx)
1109 free(ctx->devices_str);
1110 for (i = 0; i < ctx->nr_devices; ++i)
1111 free(ctx->devices[i]);
1115 static struct fuse_opt bf_opts[] = {
1120 * Fuse option parsing helper -- returning 0 means we consumed the argument, 1
1123 static int bf_opt_proc(void *data, const char *arg, int key,
1124 struct fuse_args *outargs)
1126 struct bf_context *ctx = data;
1129 case FUSE_OPT_KEY_NONOPT:
1130 /* Just extract the first non-option string. */
1131 if (!ctx->devices_str) {
1132 ctx->devices_str = strdup(arg);
1142 * dev1:dev2 -> [ dev1, dev2 ]
1145 static void tokenize_devices(struct bf_context *ctx)
1147 char *devices_str = strdup(ctx->devices_str);
1148 char *devices_tmp = devices_str;
1149 char **devices = NULL;
1153 while ((dev = strsep(&devices_tmp, ":"))) {
1154 if (strlen(dev) > 0) {
1155 devices = realloc(devices, (nr + 1) * sizeof *devices);
1156 devices[nr] = strdup(dev);
1162 devices = malloc(sizeof *devices);
1163 devices[0] = strdup(ctx->devices_str);
1167 ctx->devices = devices;
1168 ctx->nr_devices = nr;
1173 static void usage(char *argv[])
1175 printf("Usage: %s fusemount [options] <dev>[:dev2:...] <mountpoint>\n",
1180 int cmd_fusemount(int argc, char *argv[])
1182 struct fuse_args args = FUSE_ARGS_INIT(argc, argv);
1183 struct bch_opts bch_opts = bch2_opts_empty();
1184 struct bf_context ctx = { 0 };
1185 struct bch_fs *c = NULL;
1188 /* Parse arguments. */
1189 if (fuse_opt_parse(&args, &ctx, bf_opts, bf_opt_proc) < 0)
1190 die("fuse_opt_parse err: %m");
1192 struct fuse_cmdline_opts fuse_opts;
1193 if (fuse_parse_cmdline(&args, &fuse_opts) < 0)
1194 die("fuse_parse_cmdline err: %m");
1196 if (fuse_opts.show_help) {
1198 fuse_cmdline_help();
1199 fuse_lowlevel_help();
1203 if (fuse_opts.show_version) {
1204 /* TODO: Show bcachefs version. */
1205 printf("FUSE library version %s\n", fuse_pkgversion());
1206 fuse_lowlevel_version();
1210 if (!fuse_opts.mountpoint) {
1212 printf("Please supply a mountpoint.\n");
1216 if (!ctx.devices_str) {
1218 printf("Please specify a device or device1:device2:...\n");
1222 tokenize_devices(&ctx);
1225 printf("Opening bcachefs filesystem on:\n");
1226 for (i = 0; i < ctx.nr_devices; ++i)
1227 printf("\t%s\n", ctx.devices[i]);
1229 c = bch2_fs_open(ctx.devices, ctx.nr_devices, bch_opts);
1231 die("error opening %s: %s", ctx.devices_str,
1232 strerror(-PTR_ERR(c)));
1235 struct fuse_session *se =
1236 fuse_session_new(&args, &bcachefs_fuse_ops,
1237 sizeof(bcachefs_fuse_ops), c);
1239 die("fuse_lowlevel_new err: %m");
1241 if (fuse_set_signal_handlers(se) < 0)
1242 die("fuse_set_signal_handlers err: %m");
1244 if (fuse_session_mount(se, fuse_opts.mountpoint))
1245 die("fuse_mount err: %m");
1247 /* This print statement is a trigger for tests. */
1248 printf("Fuse mount initialized.\n");
1250 fuse_daemonize(fuse_opts.foreground);
1252 ret = fuse_session_loop(se);
1255 fuse_session_unmount(se);
1256 fuse_remove_signal_handlers(se);
1257 fuse_session_destroy(se);
1260 free(fuse_opts.mountpoint);
1261 fuse_opt_free_args(&args);
1262 bf_context_free(&ctx);
1267 #endif /* BCACHEFS_FUSE */