1 // SPDX-License-Identifier: GPL-2.0
7 #include "btree_update.h"
13 #include "fs-common.h"
25 #include <linux/aio.h>
26 #include <linux/backing-dev.h>
27 #include <linux/exportfs.h>
28 #include <linux/fiemap.h>
29 #include <linux/module.h>
30 #include <linux/pagemap.h>
31 #include <linux/posix_acl.h>
32 #include <linux/random.h>
33 #include <linux/statfs.h>
34 #include <linux/string.h>
35 #include <linux/xattr.h>
37 static struct kmem_cache *bch2_inode_cache;
39 static void bch2_vfs_inode_init(struct bch_fs *, subvol_inum,
40 struct bch_inode_info *,
41 struct bch_inode_unpacked *);
43 static void journal_seq_copy(struct bch_fs *c,
44 struct bch_inode_info *dst,
48 * atomic64_cmpxchg has a fallback for archs that don't support it,
51 atomic64_t *dst_seq = (void *) &dst->ei_journal_seq;
52 u64 old, v = READ_ONCE(dst->ei_journal_seq);
57 if (old >= journal_seq)
59 } while ((v = atomic64_cmpxchg(dst_seq, old, journal_seq)) != old);
61 bch2_journal_set_has_inum(&c->journal, dst->v.i_ino, journal_seq);
64 static void __pagecache_lock_put(struct pagecache_lock *lock, long i)
66 BUG_ON(atomic_long_read(&lock->v) == 0);
68 if (atomic_long_sub_return_release(i, &lock->v) == 0)
69 wake_up_all(&lock->wait);
72 static bool __pagecache_lock_tryget(struct pagecache_lock *lock, long i)
74 long v = atomic_long_read(&lock->v), old;
79 if (i > 0 ? v < 0 : v > 0)
81 } while ((v = atomic_long_cmpxchg_acquire(&lock->v,
82 old, old + i)) != old);
86 static void __pagecache_lock_get(struct pagecache_lock *lock, long i)
88 wait_event(lock->wait, __pagecache_lock_tryget(lock, i));
91 void bch2_pagecache_add_put(struct pagecache_lock *lock)
93 __pagecache_lock_put(lock, 1);
96 bool bch2_pagecache_add_tryget(struct pagecache_lock *lock)
98 return __pagecache_lock_tryget(lock, 1);
101 void bch2_pagecache_add_get(struct pagecache_lock *lock)
103 __pagecache_lock_get(lock, 1);
106 void bch2_pagecache_block_put(struct pagecache_lock *lock)
108 __pagecache_lock_put(lock, -1);
111 void bch2_pagecache_block_get(struct pagecache_lock *lock)
113 __pagecache_lock_get(lock, -1);
116 void bch2_inode_update_after_write(struct bch_fs *c,
117 struct bch_inode_info *inode,
118 struct bch_inode_unpacked *bi,
121 set_nlink(&inode->v, bch2_inode_nlink_get(bi));
122 i_uid_write(&inode->v, bi->bi_uid);
123 i_gid_write(&inode->v, bi->bi_gid);
124 inode->v.i_mode = bi->bi_mode;
126 if (fields & ATTR_ATIME)
127 inode->v.i_atime = bch2_time_to_timespec(c, bi->bi_atime);
128 if (fields & ATTR_MTIME)
129 inode->v.i_mtime = bch2_time_to_timespec(c, bi->bi_mtime);
130 if (fields & ATTR_CTIME)
131 inode->v.i_ctime = bch2_time_to_timespec(c, bi->bi_ctime);
133 inode->ei_inode = *bi;
135 bch2_inode_flags_to_vfs(inode);
138 int __must_check bch2_write_inode(struct bch_fs *c,
139 struct bch_inode_info *inode,
141 void *p, unsigned fields)
143 struct btree_trans trans;
144 struct btree_iter iter = { NULL };
145 struct bch_inode_unpacked inode_u;
148 bch2_trans_init(&trans, c, 0, 512);
150 bch2_trans_begin(&trans);
152 ret = bch2_inode_peek(&trans, &iter, &inode_u, inode_inum(inode),
153 BTREE_ITER_INTENT) ?:
154 (set ? set(inode, &inode_u, p) : 0) ?:
155 bch2_inode_write(&trans, &iter, &inode_u) ?:
156 bch2_trans_commit(&trans, NULL,
157 &inode->ei_journal_seq,
158 BTREE_INSERT_NOFAIL);
161 * the btree node lock protects inode->ei_inode, not ei_update_lock;
162 * this is important for inode updates via bchfs_write_index_update
165 bch2_inode_update_after_write(c, inode, &inode_u, fields);
167 bch2_trans_iter_exit(&trans, &iter);
172 bch2_trans_exit(&trans);
173 return ret < 0 ? ret : 0;
176 int bch2_fs_quota_transfer(struct bch_fs *c,
177 struct bch_inode_info *inode,
178 struct bch_qid new_qid,
180 enum quota_acct_mode mode)
185 qtypes &= enabled_qtypes(c);
187 for (i = 0; i < QTYP_NR; i++)
188 if (new_qid.q[i] == inode->ei_qid.q[i])
189 qtypes &= ~(1U << i);
194 mutex_lock(&inode->ei_quota_lock);
196 ret = bch2_quota_transfer(c, qtypes, new_qid,
199 inode->ei_quota_reserved,
202 for (i = 0; i < QTYP_NR; i++)
203 if (qtypes & (1 << i))
204 inode->ei_qid.q[i] = new_qid.q[i];
206 mutex_unlock(&inode->ei_quota_lock);
211 static int bch2_iget5_test(struct inode *vinode, void *p)
213 struct bch_inode_info *inode = to_bch_ei(vinode);
214 subvol_inum *inum = p;
216 return inode->ei_subvol == inum->subvol &&
217 inode->ei_inode.bi_inum == inum->inum;
220 static int bch2_iget5_set(struct inode *vinode, void *p)
222 struct bch_inode_info *inode = to_bch_ei(vinode);
223 subvol_inum *inum = p;
225 inode->v.i_ino = inum->inum;
226 inode->ei_subvol = inum->subvol;
227 inode->ei_inode.bi_inum = inum->inum;
231 static unsigned bch2_inode_hash(subvol_inum inum)
233 return jhash_3words(inum.subvol, inum.inum >> 32, inum.inum, JHASH_INITVAL);
236 struct inode *bch2_vfs_inode_get(struct bch_fs *c, subvol_inum inum)
238 struct bch_inode_unpacked inode_u;
239 struct bch_inode_info *inode;
242 inode = to_bch_ei(iget5_locked(c->vfs_sb,
243 bch2_inode_hash(inum),
247 if (unlikely(!inode))
248 return ERR_PTR(-ENOMEM);
249 if (!(inode->v.i_state & I_NEW))
252 ret = bch2_inode_find_by_inum(c, inum, &inode_u);
254 iget_failed(&inode->v);
258 bch2_vfs_inode_init(c, inum, inode, &inode_u);
260 inode->ei_journal_seq = bch2_inode_journal_seq(&c->journal, inum.inum);
262 unlock_new_inode(&inode->v);
267 struct bch_inode_info *
268 __bch2_create(struct user_namespace *mnt_userns,
269 struct bch_inode_info *dir, struct dentry *dentry,
270 umode_t mode, dev_t rdev, subvol_inum snapshot_src,
273 struct bch_fs *c = dir->v.i_sb->s_fs_info;
274 struct btree_trans trans;
275 struct bch_inode_unpacked dir_u;
276 struct bch_inode_info *inode, *old;
277 struct bch_inode_unpacked inode_u;
278 struct posix_acl *default_acl = NULL, *acl = NULL;
284 * preallocate acls + vfs inode before btree transaction, so that
285 * nothing can fail after the transaction succeeds:
287 #ifdef CONFIG_BCACHEFS_POSIX_ACL
288 ret = posix_acl_create(&dir->v, &mode, &default_acl, &acl);
292 inode = to_bch_ei(new_inode(c->vfs_sb));
293 if (unlikely(!inode)) {
294 inode = ERR_PTR(-ENOMEM);
298 bch2_inode_init_early(c, &inode_u);
300 if (!(flags & BCH_CREATE_TMPFILE))
301 mutex_lock(&dir->ei_update_lock);
303 bch2_trans_init(&trans, c, 8,
304 2048 + (!(flags & BCH_CREATE_TMPFILE)
305 ? dentry->d_name.len : 0));
307 bch2_trans_begin(&trans);
309 ret = bch2_create_trans(&trans,
310 inode_inum(dir), &dir_u, &inode_u,
311 !(flags & BCH_CREATE_TMPFILE)
312 ? &dentry->d_name : NULL,
313 from_kuid(mnt_userns, current_fsuid()),
314 from_kgid(mnt_userns, current_fsgid()),
316 default_acl, acl, snapshot_src, flags) ?:
317 bch2_quota_acct(c, bch_qid(&inode_u), Q_INO, 1,
318 KEY_TYPE_QUOTA_PREALLOC);
320 goto err_before_quota;
322 ret = bch2_trans_commit(&trans, NULL, &journal_seq, 0);
324 bch2_quota_acct(c, bch_qid(&inode_u), Q_INO, -1,
325 KEY_TYPE_QUOTA_WARN);
332 if (!(flags & BCH_CREATE_TMPFILE)) {
333 bch2_inode_update_after_write(c, dir, &dir_u,
334 ATTR_MTIME|ATTR_CTIME);
335 journal_seq_copy(c, dir, journal_seq);
336 mutex_unlock(&dir->ei_update_lock);
339 inum.subvol = inode_u.bi_subvol ?: dir->ei_subvol;
340 inum.inum = inode_u.bi_inum;
342 bch2_vfs_inode_init(c, inum, inode, &inode_u);
343 journal_seq_copy(c, inode, journal_seq);
345 set_cached_acl(&inode->v, ACL_TYPE_ACCESS, acl);
346 set_cached_acl(&inode->v, ACL_TYPE_DEFAULT, default_acl);
349 * we must insert the new inode into the inode cache before calling
350 * bch2_trans_exit() and dropping locks, else we could race with another
351 * thread pulling the inode in and modifying it:
354 inode->v.i_state |= I_CREATING;
356 old = to_bch_ei(inode_insert5(&inode->v,
357 bch2_inode_hash(inum),
363 if (unlikely(old != inode)) {
365 * We raced, another process pulled the new inode into cache
368 journal_seq_copy(c, old, journal_seq);
369 make_bad_inode(&inode->v);
375 * we really don't want insert_inode_locked2() to be setting
378 unlock_new_inode(&inode->v);
381 bch2_trans_exit(&trans);
383 posix_acl_release(default_acl);
384 posix_acl_release(acl);
387 if (!(flags & BCH_CREATE_TMPFILE))
388 mutex_unlock(&dir->ei_update_lock);
390 bch2_trans_exit(&trans);
391 make_bad_inode(&inode->v);
393 inode = ERR_PTR(ret);
399 static struct dentry *bch2_lookup(struct inode *vdir, struct dentry *dentry,
402 struct bch_fs *c = vdir->i_sb->s_fs_info;
403 struct bch_inode_info *dir = to_bch_ei(vdir);
404 struct bch_hash_info hash = bch2_hash_info_init(c, &dir->ei_inode);
405 struct inode *vinode = NULL;
406 subvol_inum inum = { .subvol = 1 };
409 ret = bch2_dirent_lookup(c, inode_inum(dir), &hash,
410 &dentry->d_name, &inum);
413 vinode = bch2_vfs_inode_get(c, inum);
415 return d_splice_alias(vinode, dentry);
418 static int bch2_mknod(struct user_namespace *mnt_userns,
419 struct inode *vdir, struct dentry *dentry,
420 umode_t mode, dev_t rdev)
422 struct bch_inode_info *inode =
423 __bch2_create(mnt_userns, to_bch_ei(vdir), dentry, mode, rdev,
424 (subvol_inum) { 0 }, 0);
427 return PTR_ERR(inode);
429 d_instantiate(dentry, &inode->v);
433 static int bch2_create(struct user_namespace *mnt_userns,
434 struct inode *vdir, struct dentry *dentry,
435 umode_t mode, bool excl)
437 return bch2_mknod(mnt_userns, vdir, dentry, mode|S_IFREG, 0);
440 static int __bch2_link(struct bch_fs *c,
441 struct bch_inode_info *inode,
442 struct bch_inode_info *dir,
443 struct dentry *dentry)
445 struct btree_trans trans;
446 struct bch_inode_unpacked dir_u, inode_u;
449 mutex_lock(&inode->ei_update_lock);
450 bch2_trans_init(&trans, c, 4, 1024);
452 ret = __bch2_trans_do(&trans, NULL, &inode->ei_journal_seq, 0,
453 bch2_link_trans(&trans,
454 inode_inum(dir), &dir_u,
455 inode_inum(inode), &inode_u,
459 BUG_ON(inode_u.bi_inum != inode->v.i_ino);
461 journal_seq_copy(c, inode, dir->ei_journal_seq);
462 bch2_inode_update_after_write(c, dir, &dir_u,
463 ATTR_MTIME|ATTR_CTIME);
464 bch2_inode_update_after_write(c, inode, &inode_u, ATTR_CTIME);
467 bch2_trans_exit(&trans);
468 mutex_unlock(&inode->ei_update_lock);
472 static int bch2_link(struct dentry *old_dentry, struct inode *vdir,
473 struct dentry *dentry)
475 struct bch_fs *c = vdir->i_sb->s_fs_info;
476 struct bch_inode_info *dir = to_bch_ei(vdir);
477 struct bch_inode_info *inode = to_bch_ei(old_dentry->d_inode);
480 lockdep_assert_held(&inode->v.i_rwsem);
482 ret = __bch2_link(c, inode, dir, dentry);
487 d_instantiate(dentry, &inode->v);
491 int __bch2_unlink(struct inode *vdir, struct dentry *dentry,
492 int deleting_snapshot)
494 struct bch_fs *c = vdir->i_sb->s_fs_info;
495 struct bch_inode_info *dir = to_bch_ei(vdir);
496 struct bch_inode_info *inode = to_bch_ei(dentry->d_inode);
497 struct bch_inode_unpacked dir_u, inode_u;
498 struct btree_trans trans;
501 bch2_lock_inodes(INODE_UPDATE_LOCK, dir, inode);
502 bch2_trans_init(&trans, c, 4, 1024);
504 ret = __bch2_trans_do(&trans, NULL, &dir->ei_journal_seq,
506 bch2_unlink_trans(&trans,
507 inode_inum(dir), &dir_u,
508 &inode_u, &dentry->d_name,
512 BUG_ON(inode_u.bi_inum != inode->v.i_ino);
514 journal_seq_copy(c, inode, dir->ei_journal_seq);
515 bch2_inode_update_after_write(c, dir, &dir_u,
516 ATTR_MTIME|ATTR_CTIME);
517 bch2_inode_update_after_write(c, inode, &inode_u,
521 bch2_trans_exit(&trans);
522 bch2_unlock_inodes(INODE_UPDATE_LOCK, dir, inode);
527 static int bch2_unlink(struct inode *vdir, struct dentry *dentry)
529 return __bch2_unlink(vdir, dentry, -1);
532 static int bch2_symlink(struct user_namespace *mnt_userns,
533 struct inode *vdir, struct dentry *dentry,
536 struct bch_fs *c = vdir->i_sb->s_fs_info;
537 struct bch_inode_info *dir = to_bch_ei(vdir), *inode;
540 inode = __bch2_create(mnt_userns, dir, dentry, S_IFLNK|S_IRWXUGO, 0,
541 (subvol_inum) { 0 }, BCH_CREATE_TMPFILE);
542 if (unlikely(IS_ERR(inode)))
543 return PTR_ERR(inode);
545 inode_lock(&inode->v);
546 ret = page_symlink(&inode->v, symname, strlen(symname) + 1);
547 inode_unlock(&inode->v);
552 ret = filemap_write_and_wait_range(inode->v.i_mapping, 0, LLONG_MAX);
556 journal_seq_copy(c, dir, inode->ei_journal_seq);
558 ret = __bch2_link(c, inode, dir, dentry);
562 d_instantiate(dentry, &inode->v);
569 static int bch2_mkdir(struct user_namespace *mnt_userns,
570 struct inode *vdir, struct dentry *dentry, umode_t mode)
572 return bch2_mknod(mnt_userns, vdir, dentry, mode|S_IFDIR, 0);
575 static int bch2_rename2(struct user_namespace *mnt_userns,
576 struct inode *src_vdir, struct dentry *src_dentry,
577 struct inode *dst_vdir, struct dentry *dst_dentry,
580 struct bch_fs *c = src_vdir->i_sb->s_fs_info;
581 struct bch_inode_info *src_dir = to_bch_ei(src_vdir);
582 struct bch_inode_info *dst_dir = to_bch_ei(dst_vdir);
583 struct bch_inode_info *src_inode = to_bch_ei(src_dentry->d_inode);
584 struct bch_inode_info *dst_inode = to_bch_ei(dst_dentry->d_inode);
585 struct bch_inode_unpacked dst_dir_u, src_dir_u;
586 struct bch_inode_unpacked src_inode_u, dst_inode_u;
587 struct btree_trans trans;
588 enum bch_rename_mode mode = flags & RENAME_EXCHANGE
589 ? BCH_RENAME_EXCHANGE
590 : dst_dentry->d_inode
591 ? BCH_RENAME_OVERWRITE : BCH_RENAME;
595 if (flags & ~(RENAME_NOREPLACE|RENAME_EXCHANGE))
598 if (mode == BCH_RENAME_OVERWRITE) {
599 ret = filemap_write_and_wait_range(src_inode->v.i_mapping,
605 bch2_trans_init(&trans, c, 8, 2048);
607 bch2_lock_inodes(INODE_UPDATE_LOCK,
613 if (inode_attr_changing(dst_dir, src_inode, Inode_opt_project)) {
614 ret = bch2_fs_quota_transfer(c, src_inode,
617 KEY_TYPE_QUOTA_PREALLOC);
622 if (mode == BCH_RENAME_EXCHANGE &&
623 inode_attr_changing(src_dir, dst_inode, Inode_opt_project)) {
624 ret = bch2_fs_quota_transfer(c, dst_inode,
627 KEY_TYPE_QUOTA_PREALLOC);
632 ret = __bch2_trans_do(&trans, NULL, &journal_seq, 0,
633 bch2_rename_trans(&trans,
634 inode_inum(src_dir), &src_dir_u,
635 inode_inum(dst_dir), &dst_dir_u,
644 BUG_ON(src_inode->v.i_ino != src_inode_u.bi_inum);
646 dst_inode->v.i_ino != dst_inode_u.bi_inum);
648 bch2_inode_update_after_write(c, src_dir, &src_dir_u,
649 ATTR_MTIME|ATTR_CTIME);
650 journal_seq_copy(c, src_dir, journal_seq);
652 if (src_dir != dst_dir) {
653 bch2_inode_update_after_write(c, dst_dir, &dst_dir_u,
654 ATTR_MTIME|ATTR_CTIME);
655 journal_seq_copy(c, dst_dir, journal_seq);
658 bch2_inode_update_after_write(c, src_inode, &src_inode_u,
660 journal_seq_copy(c, src_inode, journal_seq);
663 bch2_inode_update_after_write(c, dst_inode, &dst_inode_u,
665 journal_seq_copy(c, dst_inode, journal_seq);
668 bch2_trans_exit(&trans);
670 bch2_fs_quota_transfer(c, src_inode,
671 bch_qid(&src_inode->ei_inode),
673 KEY_TYPE_QUOTA_NOCHECK);
675 bch2_fs_quota_transfer(c, dst_inode,
676 bch_qid(&dst_inode->ei_inode),
678 KEY_TYPE_QUOTA_NOCHECK);
680 bch2_unlock_inodes(INODE_UPDATE_LOCK,
689 static void bch2_setattr_copy(struct user_namespace *mnt_userns,
690 struct bch_inode_info *inode,
691 struct bch_inode_unpacked *bi,
694 struct bch_fs *c = inode->v.i_sb->s_fs_info;
695 unsigned int ia_valid = attr->ia_valid;
697 if (ia_valid & ATTR_UID)
698 bi->bi_uid = from_kuid(mnt_userns, attr->ia_uid);
699 if (ia_valid & ATTR_GID)
700 bi->bi_gid = from_kgid(mnt_userns, attr->ia_gid);
702 if (ia_valid & ATTR_SIZE)
703 bi->bi_size = attr->ia_size;
705 if (ia_valid & ATTR_ATIME)
706 bi->bi_atime = timespec_to_bch2_time(c, attr->ia_atime);
707 if (ia_valid & ATTR_MTIME)
708 bi->bi_mtime = timespec_to_bch2_time(c, attr->ia_mtime);
709 if (ia_valid & ATTR_CTIME)
710 bi->bi_ctime = timespec_to_bch2_time(c, attr->ia_ctime);
712 if (ia_valid & ATTR_MODE) {
713 umode_t mode = attr->ia_mode;
714 kgid_t gid = ia_valid & ATTR_GID
718 if (!in_group_p(gid) &&
719 !capable_wrt_inode_uidgid(mnt_userns, &inode->v, CAP_FSETID))
725 int bch2_setattr_nonsize(struct user_namespace *mnt_userns,
726 struct bch_inode_info *inode,
729 struct bch_fs *c = inode->v.i_sb->s_fs_info;
731 struct btree_trans trans;
732 struct btree_iter inode_iter = { NULL };
733 struct bch_inode_unpacked inode_u;
734 struct posix_acl *acl = NULL;
737 mutex_lock(&inode->ei_update_lock);
741 if (attr->ia_valid & ATTR_UID)
742 qid.q[QTYP_USR] = from_kuid(&init_user_ns, attr->ia_uid);
744 if (attr->ia_valid & ATTR_GID)
745 qid.q[QTYP_GRP] = from_kgid(&init_user_ns, attr->ia_gid);
747 ret = bch2_fs_quota_transfer(c, inode, qid, ~0,
748 KEY_TYPE_QUOTA_PREALLOC);
752 bch2_trans_init(&trans, c, 0, 0);
754 bch2_trans_begin(&trans);
758 ret = bch2_inode_peek(&trans, &inode_iter, &inode_u, inode_inum(inode),
763 bch2_setattr_copy(mnt_userns, inode, &inode_u, attr);
765 if (attr->ia_valid & ATTR_MODE) {
766 ret = bch2_acl_chmod(&trans, inode_inum(inode), &inode_u,
767 inode_u.bi_mode, &acl);
772 ret = bch2_inode_write(&trans, &inode_iter, &inode_u) ?:
773 bch2_trans_commit(&trans, NULL,
774 &inode->ei_journal_seq,
775 BTREE_INSERT_NOFAIL);
777 bch2_trans_iter_exit(&trans, &inode_iter);
784 bch2_inode_update_after_write(c, inode, &inode_u, attr->ia_valid);
787 set_cached_acl(&inode->v, ACL_TYPE_ACCESS, acl);
789 bch2_trans_exit(&trans);
791 mutex_unlock(&inode->ei_update_lock);
796 static int bch2_getattr(struct user_namespace *mnt_userns,
797 const struct path *path, struct kstat *stat,
798 u32 request_mask, unsigned query_flags)
800 struct bch_inode_info *inode = to_bch_ei(d_inode(path->dentry));
801 struct bch_fs *c = inode->v.i_sb->s_fs_info;
803 stat->dev = inode->v.i_sb->s_dev;
804 stat->ino = inode->v.i_ino;
805 stat->mode = inode->v.i_mode;
806 stat->nlink = inode->v.i_nlink;
807 stat->uid = inode->v.i_uid;
808 stat->gid = inode->v.i_gid;
809 stat->rdev = inode->v.i_rdev;
810 stat->size = i_size_read(&inode->v);
811 stat->atime = inode->v.i_atime;
812 stat->mtime = inode->v.i_mtime;
813 stat->ctime = inode->v.i_ctime;
814 stat->blksize = block_bytes(c);
815 stat->blocks = inode->v.i_blocks;
817 if (request_mask & STATX_BTIME) {
818 stat->result_mask |= STATX_BTIME;
819 stat->btime = bch2_time_to_timespec(c, inode->ei_inode.bi_otime);
822 if (inode->ei_inode.bi_flags & BCH_INODE_IMMUTABLE)
823 stat->attributes |= STATX_ATTR_IMMUTABLE;
824 stat->attributes_mask |= STATX_ATTR_IMMUTABLE;
826 if (inode->ei_inode.bi_flags & BCH_INODE_APPEND)
827 stat->attributes |= STATX_ATTR_APPEND;
828 stat->attributes_mask |= STATX_ATTR_APPEND;
830 if (inode->ei_inode.bi_flags & BCH_INODE_NODUMP)
831 stat->attributes |= STATX_ATTR_NODUMP;
832 stat->attributes_mask |= STATX_ATTR_NODUMP;
837 static int bch2_setattr(struct user_namespace *mnt_userns,
838 struct dentry *dentry, struct iattr *iattr)
840 struct bch_inode_info *inode = to_bch_ei(dentry->d_inode);
843 lockdep_assert_held(&inode->v.i_rwsem);
845 ret = setattr_prepare(mnt_userns, dentry, iattr);
849 return iattr->ia_valid & ATTR_SIZE
850 ? bch2_truncate(mnt_userns, inode, iattr)
851 : bch2_setattr_nonsize(mnt_userns, inode, iattr);
854 static int bch2_tmpfile(struct user_namespace *mnt_userns,
855 struct inode *vdir, struct dentry *dentry, umode_t mode)
857 struct bch_inode_info *inode =
858 __bch2_create(mnt_userns, to_bch_ei(vdir), dentry, mode, 0,
859 (subvol_inum) { 0 }, BCH_CREATE_TMPFILE);
862 return PTR_ERR(inode);
864 d_mark_tmpfile(dentry, &inode->v);
865 d_instantiate(dentry, &inode->v);
869 static int bch2_fill_extent(struct bch_fs *c,
870 struct fiemap_extent_info *info,
871 struct bkey_s_c k, unsigned flags)
873 if (bkey_extent_is_direct_data(k.k)) {
874 struct bkey_ptrs_c ptrs = bch2_bkey_ptrs_c(k);
875 const union bch_extent_entry *entry;
876 struct extent_ptr_decoded p;
879 if (k.k->type == KEY_TYPE_reflink_v)
880 flags |= FIEMAP_EXTENT_SHARED;
882 bkey_for_each_ptr_decode(k.k, ptrs, p, entry) {
884 u64 offset = p.ptr.offset;
886 if (p.crc.compression_type)
887 flags2 |= FIEMAP_EXTENT_ENCODED;
889 offset += p.crc.offset;
891 if ((offset & (c->opts.block_size - 1)) ||
892 (k.k->size & (c->opts.block_size - 1)))
893 flags2 |= FIEMAP_EXTENT_NOT_ALIGNED;
895 ret = fiemap_fill_next_extent(info,
896 bkey_start_offset(k.k) << 9,
898 k.k->size << 9, flags|flags2);
904 } else if (bkey_extent_is_inline_data(k.k)) {
905 return fiemap_fill_next_extent(info,
906 bkey_start_offset(k.k) << 9,
909 FIEMAP_EXTENT_DATA_INLINE);
910 } else if (k.k->type == KEY_TYPE_reservation) {
911 return fiemap_fill_next_extent(info,
912 bkey_start_offset(k.k) << 9,
915 FIEMAP_EXTENT_DELALLOC|
916 FIEMAP_EXTENT_UNWRITTEN);
922 static int bch2_fiemap(struct inode *vinode, struct fiemap_extent_info *info,
925 struct bch_fs *c = vinode->i_sb->s_fs_info;
926 struct bch_inode_info *ei = to_bch_ei(vinode);
927 struct btree_trans trans;
928 struct btree_iter iter;
930 struct bkey_buf cur, prev;
931 struct bpos end = POS(ei->v.i_ino, (start + len) >> 9);
932 unsigned offset_into_extent, sectors;
933 bool have_extent = false;
937 ret = fiemap_prep(&ei->v, info, start, &len, FIEMAP_FLAG_SYNC);
941 if (start + len < start)
946 bch2_bkey_buf_init(&cur);
947 bch2_bkey_buf_init(&prev);
948 bch2_trans_init(&trans, c, 0, 0);
950 bch2_trans_begin(&trans);
952 ret = bch2_subvolume_get_snapshot(&trans, ei->ei_subvol, &snapshot);
956 bch2_trans_iter_init(&trans, &iter, BTREE_ID_extents,
957 SPOS(ei->v.i_ino, start, snapshot), 0);
959 while ((k = bch2_btree_iter_peek(&iter)).k &&
960 !(ret = bkey_err(k)) &&
961 bkey_cmp(iter.pos, end) < 0) {
962 enum btree_id data_btree = BTREE_ID_extents;
964 if (!bkey_extent_is_data(k.k) &&
965 k.k->type != KEY_TYPE_reservation) {
966 bch2_btree_iter_advance(&iter);
970 offset_into_extent = iter.pos.offset -
971 bkey_start_offset(k.k);
972 sectors = k.k->size - offset_into_extent;
974 bch2_bkey_buf_reassemble(&cur, c, k);
976 ret = bch2_read_indirect_extent(&trans, &data_btree,
977 &offset_into_extent, &cur);
981 k = bkey_i_to_s_c(cur.k);
982 bch2_bkey_buf_realloc(&prev, c, k.k->u64s);
984 sectors = min(sectors, k.k->size - offset_into_extent);
986 bch2_cut_front(POS(k.k->p.inode,
987 bkey_start_offset(k.k) +
990 bch2_key_resize(&cur.k->k, sectors);
991 cur.k->k.p = iter.pos;
992 cur.k->k.p.offset += cur.k->k.size;
995 ret = bch2_fill_extent(c, info,
996 bkey_i_to_s_c(prev.k), 0);
1001 bkey_copy(prev.k, cur.k);
1004 bch2_btree_iter_set_pos(&iter,
1005 POS(iter.pos.inode, iter.pos.offset + sectors));
1007 start = iter.pos.offset;
1008 bch2_trans_iter_exit(&trans, &iter);
1013 if (!ret && have_extent)
1014 ret = bch2_fill_extent(c, info, bkey_i_to_s_c(prev.k),
1015 FIEMAP_EXTENT_LAST);
1017 bch2_trans_exit(&trans);
1018 bch2_bkey_buf_exit(&cur, c);
1019 bch2_bkey_buf_exit(&prev, c);
1020 return ret < 0 ? ret : 0;
1023 static const struct vm_operations_struct bch_vm_ops = {
1024 .fault = bch2_page_fault,
1025 .map_pages = filemap_map_pages,
1026 .page_mkwrite = bch2_page_mkwrite,
1029 static int bch2_mmap(struct file *file, struct vm_area_struct *vma)
1031 file_accessed(file);
1033 vma->vm_ops = &bch_vm_ops;
1039 static loff_t bch2_dir_llseek(struct file *file, loff_t offset, int whence)
1041 return generic_file_llseek_size(file, offset, whence,
1045 static int bch2_vfs_readdir(struct file *file, struct dir_context *ctx)
1047 struct bch_inode_info *inode = file_bch_inode(file);
1048 struct bch_fs *c = inode->v.i_sb->s_fs_info;
1050 if (!dir_emit_dots(file, ctx))
1053 return bch2_readdir(c, inode_inum(inode), ctx);
1056 static const struct file_operations bch_file_operations = {
1057 .llseek = bch2_llseek,
1058 .read_iter = bch2_read_iter,
1059 .write_iter = bch2_write_iter,
1061 .open = generic_file_open,
1062 .fsync = bch2_fsync,
1063 .splice_read = generic_file_splice_read,
1064 .splice_write = iter_file_splice_write,
1065 .fallocate = bch2_fallocate_dispatch,
1066 .unlocked_ioctl = bch2_fs_file_ioctl,
1067 #ifdef CONFIG_COMPAT
1068 .compat_ioctl = bch2_compat_fs_ioctl,
1070 .remap_file_range = bch2_remap_file_range,
1073 static const struct inode_operations bch_file_inode_operations = {
1074 .getattr = bch2_getattr,
1075 .setattr = bch2_setattr,
1076 .fiemap = bch2_fiemap,
1077 .listxattr = bch2_xattr_list,
1078 #ifdef CONFIG_BCACHEFS_POSIX_ACL
1079 .get_acl = bch2_get_acl,
1080 .set_acl = bch2_set_acl,
1084 static const struct inode_operations bch_dir_inode_operations = {
1085 .lookup = bch2_lookup,
1086 .create = bch2_create,
1088 .unlink = bch2_unlink,
1089 .symlink = bch2_symlink,
1090 .mkdir = bch2_mkdir,
1091 .rmdir = bch2_unlink,
1092 .mknod = bch2_mknod,
1093 .rename = bch2_rename2,
1094 .getattr = bch2_getattr,
1095 .setattr = bch2_setattr,
1096 .tmpfile = bch2_tmpfile,
1097 .listxattr = bch2_xattr_list,
1098 #ifdef CONFIG_BCACHEFS_POSIX_ACL
1099 .get_acl = bch2_get_acl,
1100 .set_acl = bch2_set_acl,
1104 static const struct file_operations bch_dir_file_operations = {
1105 .llseek = bch2_dir_llseek,
1106 .read = generic_read_dir,
1107 .iterate_shared = bch2_vfs_readdir,
1108 .fsync = bch2_fsync,
1109 .unlocked_ioctl = bch2_fs_file_ioctl,
1110 #ifdef CONFIG_COMPAT
1111 .compat_ioctl = bch2_compat_fs_ioctl,
1115 static const struct inode_operations bch_symlink_inode_operations = {
1116 .get_link = page_get_link,
1117 .getattr = bch2_getattr,
1118 .setattr = bch2_setattr,
1119 .listxattr = bch2_xattr_list,
1120 #ifdef CONFIG_BCACHEFS_POSIX_ACL
1121 .get_acl = bch2_get_acl,
1122 .set_acl = bch2_set_acl,
1126 static const struct inode_operations bch_special_inode_operations = {
1127 .getattr = bch2_getattr,
1128 .setattr = bch2_setattr,
1129 .listxattr = bch2_xattr_list,
1130 #ifdef CONFIG_BCACHEFS_POSIX_ACL
1131 .get_acl = bch2_get_acl,
1132 .set_acl = bch2_set_acl,
1136 static const struct address_space_operations bch_address_space_operations = {
1137 .writepage = bch2_writepage,
1138 .readpage = bch2_readpage,
1139 .writepages = bch2_writepages,
1140 .readahead = bch2_readahead,
1141 .set_page_dirty = __set_page_dirty_nobuffers,
1142 .write_begin = bch2_write_begin,
1143 .write_end = bch2_write_end,
1144 .invalidatepage = bch2_invalidatepage,
1145 .releasepage = bch2_releasepage,
1146 .direct_IO = noop_direct_IO,
1147 #ifdef CONFIG_MIGRATION
1148 .migratepage = bch2_migrate_page,
1150 .error_remove_page = generic_error_remove_page,
1154 static struct inode *bch2_nfs_get_inode(struct super_block *sb,
1155 u64 ino, u32 generation)
1157 struct bch_fs *c = sb->s_fs_info;
1158 struct inode *vinode;
1160 if (ino < BCACHEFS_ROOT_INO)
1161 return ERR_PTR(-ESTALE);
1163 vinode = bch2_vfs_inode_get(c, ino);
1165 return ERR_CAST(vinode);
1166 if (generation && vinode->i_generation != generation) {
1167 /* we didn't find the right inode.. */
1169 return ERR_PTR(-ESTALE);
1174 static struct dentry *bch2_fh_to_dentry(struct super_block *sb, struct fid *fid,
1175 int fh_len, int fh_type)
1177 return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
1178 bch2_nfs_get_inode);
1181 static struct dentry *bch2_fh_to_parent(struct super_block *sb, struct fid *fid,
1182 int fh_len, int fh_type)
1184 return generic_fh_to_parent(sb, fid, fh_len, fh_type,
1185 bch2_nfs_get_inode);
1189 static const struct export_operations bch_export_ops = {
1190 //.fh_to_dentry = bch2_fh_to_dentry,
1191 //.fh_to_parent = bch2_fh_to_parent,
1192 //.get_parent = bch2_get_parent,
1195 static void bch2_vfs_inode_init(struct bch_fs *c, subvol_inum inum,
1196 struct bch_inode_info *inode,
1197 struct bch_inode_unpacked *bi)
1199 bch2_inode_update_after_write(c, inode, bi, ~0);
1201 inode->v.i_blocks = bi->bi_sectors;
1202 inode->v.i_ino = bi->bi_inum;
1203 inode->v.i_rdev = bi->bi_dev;
1204 inode->v.i_generation = bi->bi_generation;
1205 inode->v.i_size = bi->bi_size;
1207 inode->ei_flags = 0;
1208 inode->ei_journal_seq = 0;
1209 inode->ei_quota_reserved = 0;
1210 inode->ei_qid = bch_qid(bi);
1211 inode->ei_subvol = inum.subvol;
1213 inode->v.i_mapping->a_ops = &bch_address_space_operations;
1215 switch (inode->v.i_mode & S_IFMT) {
1217 inode->v.i_op = &bch_file_inode_operations;
1218 inode->v.i_fop = &bch_file_operations;
1221 inode->v.i_op = &bch_dir_inode_operations;
1222 inode->v.i_fop = &bch_dir_file_operations;
1225 inode_nohighmem(&inode->v);
1226 inode->v.i_op = &bch_symlink_inode_operations;
1229 init_special_inode(&inode->v, inode->v.i_mode, inode->v.i_rdev);
1230 inode->v.i_op = &bch_special_inode_operations;
1235 static struct inode *bch2_alloc_inode(struct super_block *sb)
1237 struct bch_inode_info *inode;
1239 inode = kmem_cache_alloc(bch2_inode_cache, GFP_NOFS);
1243 inode_init_once(&inode->v);
1244 mutex_init(&inode->ei_update_lock);
1245 pagecache_lock_init(&inode->ei_pagecache_lock);
1246 mutex_init(&inode->ei_quota_lock);
1247 inode->ei_journal_seq = 0;
1252 static void bch2_i_callback(struct rcu_head *head)
1254 struct inode *vinode = container_of(head, struct inode, i_rcu);
1255 struct bch_inode_info *inode = to_bch_ei(vinode);
1257 kmem_cache_free(bch2_inode_cache, inode);
1260 static void bch2_destroy_inode(struct inode *vinode)
1262 call_rcu(&vinode->i_rcu, bch2_i_callback);
1265 static int inode_update_times_fn(struct bch_inode_info *inode,
1266 struct bch_inode_unpacked *bi,
1269 struct bch_fs *c = inode->v.i_sb->s_fs_info;
1271 bi->bi_atime = timespec_to_bch2_time(c, inode->v.i_atime);
1272 bi->bi_mtime = timespec_to_bch2_time(c, inode->v.i_mtime);
1273 bi->bi_ctime = timespec_to_bch2_time(c, inode->v.i_ctime);
1278 static int bch2_vfs_write_inode(struct inode *vinode,
1279 struct writeback_control *wbc)
1281 struct bch_fs *c = vinode->i_sb->s_fs_info;
1282 struct bch_inode_info *inode = to_bch_ei(vinode);
1285 mutex_lock(&inode->ei_update_lock);
1286 ret = bch2_write_inode(c, inode, inode_update_times_fn, NULL,
1287 ATTR_ATIME|ATTR_MTIME|ATTR_CTIME);
1288 mutex_unlock(&inode->ei_update_lock);
1293 static void bch2_evict_inode(struct inode *vinode)
1295 struct bch_fs *c = vinode->i_sb->s_fs_info;
1296 struct bch_inode_info *inode = to_bch_ei(vinode);
1298 truncate_inode_pages_final(&inode->v.i_data);
1300 clear_inode(&inode->v);
1302 BUG_ON(!is_bad_inode(&inode->v) && inode->ei_quota_reserved);
1304 if (!inode->v.i_nlink && !is_bad_inode(&inode->v)) {
1305 bch2_quota_acct(c, inode->ei_qid, Q_SPC, -((s64) inode->v.i_blocks),
1306 KEY_TYPE_QUOTA_WARN);
1307 bch2_quota_acct(c, inode->ei_qid, Q_INO, -1,
1308 KEY_TYPE_QUOTA_WARN);
1309 bch2_inode_rm(c, inode_inum(inode), true);
1313 static int bch2_statfs(struct dentry *dentry, struct kstatfs *buf)
1315 struct super_block *sb = dentry->d_sb;
1316 struct bch_fs *c = sb->s_fs_info;
1317 struct bch_fs_usage_short usage = bch2_fs_usage_read_short(c);
1318 unsigned shift = sb->s_blocksize_bits - 9;
1320 * this assumes inodes take up 64 bytes, which is a decent average
1323 u64 avail_inodes = ((usage.capacity - usage.used) << 3);
1326 buf->f_type = BCACHEFS_STATFS_MAGIC;
1327 buf->f_bsize = sb->s_blocksize;
1328 buf->f_blocks = usage.capacity >> shift;
1329 buf->f_bfree = usage.free >> shift;
1330 buf->f_bavail = avail_factor(usage.free) >> shift;
1332 buf->f_files = usage.nr_inodes + avail_inodes;
1333 buf->f_ffree = avail_inodes;
1335 fsid = le64_to_cpup((void *) c->sb.user_uuid.b) ^
1336 le64_to_cpup((void *) c->sb.user_uuid.b + sizeof(u64));
1337 buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL;
1338 buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL;
1339 buf->f_namelen = BCH_NAME_MAX;
1344 static int bch2_sync_fs(struct super_block *sb, int wait)
1346 struct bch_fs *c = sb->s_fs_info;
1348 if (c->opts.journal_flush_disabled)
1352 bch2_journal_flush_async(&c->journal, NULL);
1356 return bch2_journal_flush(&c->journal);
1359 static struct bch_fs *bch2_path_to_fs(const char *path)
1365 ret = lookup_bdev(path, &dev);
1367 return ERR_PTR(ret);
1369 c = bch2_dev_to_fs(dev);
1371 closure_put(&c->cl);
1372 return c ?: ERR_PTR(-ENOENT);
1375 static char **split_devs(const char *_dev_name, unsigned *nr)
1377 char *dev_name = NULL, **devs = NULL, *s;
1378 size_t i, nr_devs = 0;
1380 dev_name = kstrdup(_dev_name, GFP_KERNEL);
1384 for (s = dev_name; s; s = strchr(s + 1, ':'))
1387 devs = kcalloc(nr_devs + 1, sizeof(const char *), GFP_KERNEL);
1393 for (i = 0, s = dev_name;
1395 (s = strchr(s, ':')) && (*s++ = '\0'))
1402 static int bch2_remount(struct super_block *sb, int *flags, char *data)
1404 struct bch_fs *c = sb->s_fs_info;
1405 struct bch_opts opts = bch2_opts_empty();
1408 opt_set(opts, read_only, (*flags & SB_RDONLY) != 0);
1410 ret = bch2_parse_mount_opts(c, &opts, data);
1414 if (opts.read_only != c->opts.read_only) {
1415 down_write(&c->state_lock);
1417 if (opts.read_only) {
1418 bch2_fs_read_only(c);
1420 sb->s_flags |= SB_RDONLY;
1422 ret = bch2_fs_read_write(c);
1424 bch_err(c, "error going rw: %i", ret);
1425 up_write(&c->state_lock);
1429 sb->s_flags &= ~SB_RDONLY;
1432 c->opts.read_only = opts.read_only;
1434 up_write(&c->state_lock);
1437 if (opts.errors >= 0)
1438 c->opts.errors = opts.errors;
1443 static int bch2_show_devname(struct seq_file *seq, struct dentry *root)
1445 struct bch_fs *c = root->d_sb->s_fs_info;
1450 for_each_online_member(ca, c, i) {
1454 seq_puts(seq, "/dev/");
1455 seq_puts(seq, ca->name);
1461 static int bch2_show_options(struct seq_file *seq, struct dentry *root)
1463 struct bch_fs *c = root->d_sb->s_fs_info;
1467 for (i = 0; i < bch2_opts_nr; i++) {
1468 const struct bch_option *opt = &bch2_opt_table[i];
1469 u64 v = bch2_opt_get_by_id(&c->opts, i);
1471 if (!(opt->mode & OPT_MOUNT))
1474 if (v == bch2_opt_get_by_id(&bch2_opts_default, i))
1477 bch2_opt_to_text(&PBUF(buf), c, opt, v,
1478 OPT_SHOW_MOUNT_STYLE);
1486 static void bch2_put_super(struct super_block *sb)
1488 struct bch_fs *c = sb->s_fs_info;
1493 static const struct super_operations bch_super_operations = {
1494 .alloc_inode = bch2_alloc_inode,
1495 .destroy_inode = bch2_destroy_inode,
1496 .write_inode = bch2_vfs_write_inode,
1497 .evict_inode = bch2_evict_inode,
1498 .sync_fs = bch2_sync_fs,
1499 .statfs = bch2_statfs,
1500 .show_devname = bch2_show_devname,
1501 .show_options = bch2_show_options,
1502 .remount_fs = bch2_remount,
1503 .put_super = bch2_put_super,
1505 .freeze_fs = bch2_freeze,
1506 .unfreeze_fs = bch2_unfreeze,
1510 static int bch2_set_super(struct super_block *s, void *data)
1512 s->s_fs_info = data;
1516 static int bch2_noset_super(struct super_block *s, void *data)
1521 static int bch2_test_super(struct super_block *s, void *data)
1523 struct bch_fs *c = s->s_fs_info;
1524 struct bch_fs **devs = data;
1530 for (i = 0; devs[i]; i++)
1536 static struct dentry *bch2_mount(struct file_system_type *fs_type,
1537 int flags, const char *dev_name, void *data)
1541 struct super_block *sb;
1542 struct inode *vinode;
1543 struct bch_opts opts = bch2_opts_empty();
1545 struct bch_fs **devs_to_fs = NULL;
1546 unsigned i, nr_devs;
1549 opt_set(opts, read_only, (flags & SB_RDONLY) != 0);
1551 ret = bch2_parse_mount_opts(NULL, &opts, data);
1553 return ERR_PTR(ret);
1555 if (!dev_name || strlen(dev_name) == 0)
1556 return ERR_PTR(-EINVAL);
1558 devs = split_devs(dev_name, &nr_devs);
1560 return ERR_PTR(-ENOMEM);
1562 devs_to_fs = kcalloc(nr_devs + 1, sizeof(void *), GFP_KERNEL);
1564 sb = ERR_PTR(-ENOMEM);
1568 for (i = 0; i < nr_devs; i++)
1569 devs_to_fs[i] = bch2_path_to_fs(devs[i]);
1571 sb = sget(fs_type, bch2_test_super, bch2_noset_super,
1572 flags|SB_NOSEC, devs_to_fs);
1576 c = bch2_fs_open(devs, nr_devs, opts);
1582 /* Some options can't be parsed until after the fs is started: */
1583 ret = bch2_parse_mount_opts(c, &opts, data);
1590 bch2_opts_apply(&c->opts, opts);
1592 sb = sget(fs_type, NULL, bch2_set_super, flags|SB_NOSEC, c);
1601 return ERR_CAST(sb);
1606 if ((flags ^ sb->s_flags) & SB_RDONLY) {
1613 sb->s_blocksize = block_bytes(c);
1614 sb->s_blocksize_bits = ilog2(block_bytes(c));
1615 sb->s_maxbytes = MAX_LFS_FILESIZE;
1616 sb->s_op = &bch_super_operations;
1617 sb->s_export_op = &bch_export_ops;
1618 #ifdef CONFIG_BCACHEFS_QUOTA
1619 sb->s_qcop = &bch2_quotactl_operations;
1620 sb->s_quota_types = QTYPE_MASK_USR|QTYPE_MASK_GRP|QTYPE_MASK_PRJ;
1622 sb->s_xattr = bch2_xattr_handlers;
1623 sb->s_magic = BCACHEFS_STATFS_MAGIC;
1624 sb->s_time_gran = c->sb.nsec_per_time_unit;
1625 sb->s_time_min = div_s64(S64_MIN, c->sb.time_units_per_sec) + 1;
1626 sb->s_time_max = div_s64(S64_MAX, c->sb.time_units_per_sec);
1628 strlcpy(sb->s_id, c->name, sizeof(sb->s_id));
1630 ret = super_setup_bdi(sb);
1634 sb->s_bdi->ra_pages = VM_READAHEAD_PAGES;
1636 for_each_online_member(ca, c, i) {
1637 struct block_device *bdev = ca->disk_sb.bdev;
1639 /* XXX: create an anonymous device for multi device filesystems */
1641 sb->s_dev = bdev->bd_dev;
1642 percpu_ref_put(&ca->io_ref);
1648 #ifdef CONFIG_BCACHEFS_POSIX_ACL
1650 sb->s_flags |= SB_POSIXACL;
1653 vinode = bch2_vfs_inode_get(c, BCACHEFS_ROOT_SUBVOL_INUM);
1654 if (IS_ERR(vinode)) {
1655 bch_err(c, "error mounting: error getting root inode %i",
1656 (int) PTR_ERR(vinode));
1657 ret = PTR_ERR(vinode);
1661 sb->s_root = d_make_root(vinode);
1663 bch_err(c, "error mounting: error allocating root dentry");
1668 sb->s_flags |= SB_ACTIVE;
1670 return dget(sb->s_root);
1673 deactivate_locked_super(sb);
1674 return ERR_PTR(ret);
1677 static void bch2_kill_sb(struct super_block *sb)
1679 struct bch_fs *c = sb->s_fs_info;
1681 generic_shutdown_super(sb);
1685 static struct file_system_type bcache_fs_type = {
1686 .owner = THIS_MODULE,
1688 .mount = bch2_mount,
1689 .kill_sb = bch2_kill_sb,
1690 .fs_flags = FS_REQUIRES_DEV,
1693 MODULE_ALIAS_FS("bcachefs");
1695 void bch2_vfs_exit(void)
1697 unregister_filesystem(&bcache_fs_type);
1698 if (bch2_inode_cache)
1699 kmem_cache_destroy(bch2_inode_cache);
1702 int __init bch2_vfs_init(void)
1706 bch2_inode_cache = KMEM_CACHE(bch_inode_info, 0);
1707 if (!bch2_inode_cache)
1710 ret = register_filesystem(&bcache_fs_type);
1720 #endif /* NO_BCACHEFS_FS */