1 // SPDX-License-Identifier: GPL-2.0
7 #include "btree_update.h"
14 #include "fs-common.h"
26 #include <linux/aio.h>
27 #include <linux/backing-dev.h>
28 #include <linux/exportfs.h>
29 #include <linux/fiemap.h>
30 #include <linux/module.h>
31 #include <linux/pagemap.h>
32 #include <linux/posix_acl.h>
33 #include <linux/random.h>
34 #include <linux/seq_file.h>
35 #include <linux/statfs.h>
36 #include <linux/string.h>
37 #include <linux/xattr.h>
39 static struct kmem_cache *bch2_inode_cache;
41 static void bch2_vfs_inode_init(struct btree_trans *, subvol_inum,
42 struct bch_inode_info *,
43 struct bch_inode_unpacked *,
44 struct bch_subvolume *);
46 void bch2_inode_update_after_write(struct btree_trans *trans,
47 struct bch_inode_info *inode,
48 struct bch_inode_unpacked *bi,
51 struct bch_fs *c = trans->c;
53 BUG_ON(bi->bi_inum != inode->v.i_ino);
55 bch2_assert_pos_locked(trans, BTREE_ID_inodes,
57 c->opts.inodes_use_key_cache);
59 set_nlink(&inode->v, bch2_inode_nlink_get(bi));
60 i_uid_write(&inode->v, bi->bi_uid);
61 i_gid_write(&inode->v, bi->bi_gid);
62 inode->v.i_mode = bi->bi_mode;
64 if (fields & ATTR_ATIME)
65 inode->v.i_atime = bch2_time_to_timespec(c, bi->bi_atime);
66 if (fields & ATTR_MTIME)
67 inode->v.i_mtime = bch2_time_to_timespec(c, bi->bi_mtime);
68 if (fields & ATTR_CTIME)
69 inode->v.i_ctime = bch2_time_to_timespec(c, bi->bi_ctime);
71 inode->ei_inode = *bi;
73 bch2_inode_flags_to_vfs(inode);
76 int __must_check bch2_write_inode(struct bch_fs *c,
77 struct bch_inode_info *inode,
79 void *p, unsigned fields)
81 struct btree_trans trans;
82 struct btree_iter iter = { NULL };
83 struct bch_inode_unpacked inode_u;
86 bch2_trans_init(&trans, c, 0, 512);
88 bch2_trans_begin(&trans);
90 ret = bch2_inode_peek(&trans, &iter, &inode_u, inode_inum(inode),
92 (set ? set(inode, &inode_u, p) : 0) ?:
93 bch2_inode_write(&trans, &iter, &inode_u) ?:
94 bch2_trans_commit(&trans, NULL, NULL, BTREE_INSERT_NOFAIL);
97 * the btree node lock protects inode->ei_inode, not ei_update_lock;
98 * this is important for inode updates via bchfs_write_index_update
101 bch2_inode_update_after_write(&trans, inode, &inode_u, fields);
103 bch2_trans_iter_exit(&trans, &iter);
105 if (bch2_err_matches(ret, BCH_ERR_transaction_restart))
108 bch2_trans_exit(&trans);
109 return ret < 0 ? ret : 0;
112 int bch2_fs_quota_transfer(struct bch_fs *c,
113 struct bch_inode_info *inode,
114 struct bch_qid new_qid,
116 enum quota_acct_mode mode)
121 qtypes &= enabled_qtypes(c);
123 for (i = 0; i < QTYP_NR; i++)
124 if (new_qid.q[i] == inode->ei_qid.q[i])
125 qtypes &= ~(1U << i);
130 mutex_lock(&inode->ei_quota_lock);
132 ret = bch2_quota_transfer(c, qtypes, new_qid,
135 inode->ei_quota_reserved,
138 for (i = 0; i < QTYP_NR; i++)
139 if (qtypes & (1 << i))
140 inode->ei_qid.q[i] = new_qid.q[i];
142 mutex_unlock(&inode->ei_quota_lock);
147 static int bch2_iget5_test(struct inode *vinode, void *p)
149 struct bch_inode_info *inode = to_bch_ei(vinode);
150 subvol_inum *inum = p;
152 return inode->ei_subvol == inum->subvol &&
153 inode->ei_inode.bi_inum == inum->inum;
156 static int bch2_iget5_set(struct inode *vinode, void *p)
158 struct bch_inode_info *inode = to_bch_ei(vinode);
159 subvol_inum *inum = p;
161 inode->v.i_ino = inum->inum;
162 inode->ei_subvol = inum->subvol;
163 inode->ei_inode.bi_inum = inum->inum;
167 static unsigned bch2_inode_hash(subvol_inum inum)
169 return jhash_3words(inum.subvol, inum.inum >> 32, inum.inum, JHASH_INITVAL);
172 struct inode *bch2_vfs_inode_get(struct bch_fs *c, subvol_inum inum)
174 struct bch_inode_unpacked inode_u;
175 struct bch_inode_info *inode;
176 struct btree_trans trans;
177 struct bch_subvolume subvol;
180 inode = to_bch_ei(iget5_locked(c->vfs_sb,
181 bch2_inode_hash(inum),
185 if (unlikely(!inode))
186 return ERR_PTR(-ENOMEM);
187 if (!(inode->v.i_state & I_NEW))
190 bch2_trans_init(&trans, c, 8, 0);
191 ret = lockrestart_do(&trans,
192 bch2_subvolume_get(&trans, inum.subvol, true, 0, &subvol) ?:
193 bch2_inode_find_by_inum_trans(&trans, inum, &inode_u));
196 bch2_vfs_inode_init(&trans, inum, inode, &inode_u, &subvol);
197 bch2_trans_exit(&trans);
200 iget_failed(&inode->v);
204 unlock_new_inode(&inode->v);
209 struct bch_inode_info *
210 __bch2_create(struct user_namespace *mnt_userns,
211 struct bch_inode_info *dir, struct dentry *dentry,
212 umode_t mode, dev_t rdev, subvol_inum snapshot_src,
215 struct bch_fs *c = dir->v.i_sb->s_fs_info;
216 struct btree_trans trans;
217 struct bch_inode_unpacked dir_u;
218 struct bch_inode_info *inode, *old;
219 struct bch_inode_unpacked inode_u;
220 struct posix_acl *default_acl = NULL, *acl = NULL;
222 struct bch_subvolume subvol;
227 * preallocate acls + vfs inode before btree transaction, so that
228 * nothing can fail after the transaction succeeds:
230 #ifdef CONFIG_BCACHEFS_POSIX_ACL
231 ret = posix_acl_create(&dir->v, &mode, &default_acl, &acl);
235 inode = to_bch_ei(new_inode(c->vfs_sb));
236 if (unlikely(!inode)) {
237 inode = ERR_PTR(-ENOMEM);
241 bch2_inode_init_early(c, &inode_u);
243 if (!(flags & BCH_CREATE_TMPFILE))
244 mutex_lock(&dir->ei_update_lock);
246 bch2_trans_init(&trans, c, 8,
247 2048 + (!(flags & BCH_CREATE_TMPFILE)
248 ? dentry->d_name.len : 0));
250 bch2_trans_begin(&trans);
252 ret = bch2_create_trans(&trans,
253 inode_inum(dir), &dir_u, &inode_u,
254 !(flags & BCH_CREATE_TMPFILE)
255 ? &dentry->d_name : NULL,
256 from_kuid(mnt_userns, current_fsuid()),
257 from_kgid(mnt_userns, current_fsgid()),
259 default_acl, acl, snapshot_src, flags) ?:
260 bch2_quota_acct(c, bch_qid(&inode_u), Q_INO, 1,
261 KEY_TYPE_QUOTA_PREALLOC);
263 goto err_before_quota;
265 inum.subvol = inode_u.bi_subvol ?: dir->ei_subvol;
266 inum.inum = inode_u.bi_inum;
268 ret = bch2_subvolume_get(&trans, inum.subvol, true,
269 BTREE_ITER_WITH_UPDATES, &subvol) ?:
270 bch2_trans_commit(&trans, NULL, &journal_seq, 0);
272 bch2_quota_acct(c, bch_qid(&inode_u), Q_INO, -1,
273 KEY_TYPE_QUOTA_WARN);
275 if (bch2_err_matches(ret, BCH_ERR_transaction_restart))
280 if (!(flags & BCH_CREATE_TMPFILE)) {
281 bch2_inode_update_after_write(&trans, dir, &dir_u,
282 ATTR_MTIME|ATTR_CTIME);
283 mutex_unlock(&dir->ei_update_lock);
286 bch2_iget5_set(&inode->v, &inum);
287 bch2_vfs_inode_init(&trans, inum, inode, &inode_u, &subvol);
289 set_cached_acl(&inode->v, ACL_TYPE_ACCESS, acl);
290 set_cached_acl(&inode->v, ACL_TYPE_DEFAULT, default_acl);
293 * we must insert the new inode into the inode cache before calling
294 * bch2_trans_exit() and dropping locks, else we could race with another
295 * thread pulling the inode in and modifying it:
298 inode->v.i_state |= I_CREATING;
300 old = to_bch_ei(inode_insert5(&inode->v,
301 bch2_inode_hash(inum),
307 if (unlikely(old != inode)) {
309 * We raced, another process pulled the new inode into cache
312 make_bad_inode(&inode->v);
318 * we really don't want insert_inode_locked2() to be setting
321 unlock_new_inode(&inode->v);
324 bch2_trans_exit(&trans);
326 posix_acl_release(default_acl);
327 posix_acl_release(acl);
330 if (!(flags & BCH_CREATE_TMPFILE))
331 mutex_unlock(&dir->ei_update_lock);
333 bch2_trans_exit(&trans);
334 make_bad_inode(&inode->v);
336 inode = ERR_PTR(ret);
342 static struct dentry *bch2_lookup(struct inode *vdir, struct dentry *dentry,
345 struct bch_fs *c = vdir->i_sb->s_fs_info;
346 struct bch_inode_info *dir = to_bch_ei(vdir);
347 struct bch_hash_info hash = bch2_hash_info_init(c, &dir->ei_inode);
348 struct inode *vinode = NULL;
349 subvol_inum inum = { .subvol = 1 };
352 ret = bch2_dirent_lookup(c, inode_inum(dir), &hash,
353 &dentry->d_name, &inum);
356 vinode = bch2_vfs_inode_get(c, inum);
358 return d_splice_alias(vinode, dentry);
361 static int bch2_mknod(struct user_namespace *mnt_userns,
362 struct inode *vdir, struct dentry *dentry,
363 umode_t mode, dev_t rdev)
365 struct bch_inode_info *inode =
366 __bch2_create(mnt_userns, to_bch_ei(vdir), dentry, mode, rdev,
367 (subvol_inum) { 0 }, 0);
370 return bch2_err_class(PTR_ERR(inode));
372 d_instantiate(dentry, &inode->v);
376 static int bch2_create(struct user_namespace *mnt_userns,
377 struct inode *vdir, struct dentry *dentry,
378 umode_t mode, bool excl)
380 return bch2_mknod(mnt_userns, vdir, dentry, mode|S_IFREG, 0);
383 static int __bch2_link(struct bch_fs *c,
384 struct bch_inode_info *inode,
385 struct bch_inode_info *dir,
386 struct dentry *dentry)
388 struct btree_trans trans;
389 struct bch_inode_unpacked dir_u, inode_u;
392 mutex_lock(&inode->ei_update_lock);
393 bch2_trans_init(&trans, c, 4, 1024);
395 ret = commit_do(&trans, NULL, NULL, 0,
396 bch2_link_trans(&trans,
397 inode_inum(dir), &dir_u,
398 inode_inum(inode), &inode_u,
402 bch2_inode_update_after_write(&trans, dir, &dir_u,
403 ATTR_MTIME|ATTR_CTIME);
404 bch2_inode_update_after_write(&trans, inode, &inode_u, ATTR_CTIME);
407 bch2_trans_exit(&trans);
408 mutex_unlock(&inode->ei_update_lock);
412 static int bch2_link(struct dentry *old_dentry, struct inode *vdir,
413 struct dentry *dentry)
415 struct bch_fs *c = vdir->i_sb->s_fs_info;
416 struct bch_inode_info *dir = to_bch_ei(vdir);
417 struct bch_inode_info *inode = to_bch_ei(old_dentry->d_inode);
420 lockdep_assert_held(&inode->v.i_rwsem);
422 ret = __bch2_link(c, inode, dir, dentry);
427 d_instantiate(dentry, &inode->v);
431 int __bch2_unlink(struct inode *vdir, struct dentry *dentry,
432 bool deleting_snapshot)
434 struct bch_fs *c = vdir->i_sb->s_fs_info;
435 struct bch_inode_info *dir = to_bch_ei(vdir);
436 struct bch_inode_info *inode = to_bch_ei(dentry->d_inode);
437 struct bch_inode_unpacked dir_u, inode_u;
438 struct btree_trans trans;
441 bch2_lock_inodes(INODE_UPDATE_LOCK, dir, inode);
442 bch2_trans_init(&trans, c, 4, 1024);
444 ret = commit_do(&trans, NULL, NULL,
446 bch2_unlink_trans(&trans,
447 inode_inum(dir), &dir_u,
448 &inode_u, &dentry->d_name,
452 bch2_inode_update_after_write(&trans, dir, &dir_u,
453 ATTR_MTIME|ATTR_CTIME);
454 bch2_inode_update_after_write(&trans, inode, &inode_u,
458 bch2_trans_exit(&trans);
459 bch2_unlock_inodes(INODE_UPDATE_LOCK, dir, inode);
464 static int bch2_unlink(struct inode *vdir, struct dentry *dentry)
466 return __bch2_unlink(vdir, dentry, false);
469 static int bch2_symlink(struct user_namespace *mnt_userns,
470 struct inode *vdir, struct dentry *dentry,
473 struct bch_fs *c = vdir->i_sb->s_fs_info;
474 struct bch_inode_info *dir = to_bch_ei(vdir), *inode;
477 inode = __bch2_create(mnt_userns, dir, dentry, S_IFLNK|S_IRWXUGO, 0,
478 (subvol_inum) { 0 }, BCH_CREATE_TMPFILE);
480 return bch2_err_class(PTR_ERR(inode));
482 inode_lock(&inode->v);
483 ret = page_symlink(&inode->v, symname, strlen(symname) + 1);
484 inode_unlock(&inode->v);
489 ret = filemap_write_and_wait_range(inode->v.i_mapping, 0, LLONG_MAX);
493 ret = __bch2_link(c, inode, dir, dentry);
497 d_instantiate(dentry, &inode->v);
504 static int bch2_mkdir(struct user_namespace *mnt_userns,
505 struct inode *vdir, struct dentry *dentry, umode_t mode)
507 return bch2_mknod(mnt_userns, vdir, dentry, mode|S_IFDIR, 0);
510 static int bch2_rename2(struct user_namespace *mnt_userns,
511 struct inode *src_vdir, struct dentry *src_dentry,
512 struct inode *dst_vdir, struct dentry *dst_dentry,
515 struct bch_fs *c = src_vdir->i_sb->s_fs_info;
516 struct bch_inode_info *src_dir = to_bch_ei(src_vdir);
517 struct bch_inode_info *dst_dir = to_bch_ei(dst_vdir);
518 struct bch_inode_info *src_inode = to_bch_ei(src_dentry->d_inode);
519 struct bch_inode_info *dst_inode = to_bch_ei(dst_dentry->d_inode);
520 struct bch_inode_unpacked dst_dir_u, src_dir_u;
521 struct bch_inode_unpacked src_inode_u, dst_inode_u;
522 struct btree_trans trans;
523 enum bch_rename_mode mode = flags & RENAME_EXCHANGE
524 ? BCH_RENAME_EXCHANGE
525 : dst_dentry->d_inode
526 ? BCH_RENAME_OVERWRITE : BCH_RENAME;
529 if (flags & ~(RENAME_NOREPLACE|RENAME_EXCHANGE))
532 if (mode == BCH_RENAME_OVERWRITE) {
533 ret = filemap_write_and_wait_range(src_inode->v.i_mapping,
539 bch2_trans_init(&trans, c, 8, 2048);
541 bch2_lock_inodes(INODE_UPDATE_LOCK,
547 if (inode_attr_changing(dst_dir, src_inode, Inode_opt_project)) {
548 ret = bch2_fs_quota_transfer(c, src_inode,
551 KEY_TYPE_QUOTA_PREALLOC);
556 if (mode == BCH_RENAME_EXCHANGE &&
557 inode_attr_changing(src_dir, dst_inode, Inode_opt_project)) {
558 ret = bch2_fs_quota_transfer(c, dst_inode,
561 KEY_TYPE_QUOTA_PREALLOC);
566 ret = commit_do(&trans, NULL, NULL, 0,
567 bch2_rename_trans(&trans,
568 inode_inum(src_dir), &src_dir_u,
569 inode_inum(dst_dir), &dst_dir_u,
578 BUG_ON(src_inode->v.i_ino != src_inode_u.bi_inum);
580 dst_inode->v.i_ino != dst_inode_u.bi_inum);
582 bch2_inode_update_after_write(&trans, src_dir, &src_dir_u,
583 ATTR_MTIME|ATTR_CTIME);
585 if (src_dir != dst_dir)
586 bch2_inode_update_after_write(&trans, dst_dir, &dst_dir_u,
587 ATTR_MTIME|ATTR_CTIME);
589 bch2_inode_update_after_write(&trans, src_inode, &src_inode_u,
593 bch2_inode_update_after_write(&trans, dst_inode, &dst_inode_u,
596 bch2_trans_exit(&trans);
598 bch2_fs_quota_transfer(c, src_inode,
599 bch_qid(&src_inode->ei_inode),
601 KEY_TYPE_QUOTA_NOCHECK);
603 bch2_fs_quota_transfer(c, dst_inode,
604 bch_qid(&dst_inode->ei_inode),
606 KEY_TYPE_QUOTA_NOCHECK);
608 bch2_unlock_inodes(INODE_UPDATE_LOCK,
617 static void bch2_setattr_copy(struct user_namespace *mnt_userns,
618 struct bch_inode_info *inode,
619 struct bch_inode_unpacked *bi,
622 struct bch_fs *c = inode->v.i_sb->s_fs_info;
623 unsigned int ia_valid = attr->ia_valid;
625 if (ia_valid & ATTR_UID)
626 bi->bi_uid = from_kuid(mnt_userns, attr->ia_uid);
627 if (ia_valid & ATTR_GID)
628 bi->bi_gid = from_kgid(mnt_userns, attr->ia_gid);
630 if (ia_valid & ATTR_SIZE)
631 bi->bi_size = attr->ia_size;
633 if (ia_valid & ATTR_ATIME)
634 bi->bi_atime = timespec_to_bch2_time(c, attr->ia_atime);
635 if (ia_valid & ATTR_MTIME)
636 bi->bi_mtime = timespec_to_bch2_time(c, attr->ia_mtime);
637 if (ia_valid & ATTR_CTIME)
638 bi->bi_ctime = timespec_to_bch2_time(c, attr->ia_ctime);
640 if (ia_valid & ATTR_MODE) {
641 umode_t mode = attr->ia_mode;
642 kgid_t gid = ia_valid & ATTR_GID
646 if (!in_group_p(gid) &&
647 !capable_wrt_inode_uidgid(mnt_userns, &inode->v, CAP_FSETID))
653 int bch2_setattr_nonsize(struct user_namespace *mnt_userns,
654 struct bch_inode_info *inode,
657 struct bch_fs *c = inode->v.i_sb->s_fs_info;
659 struct btree_trans trans;
660 struct btree_iter inode_iter = { NULL };
661 struct bch_inode_unpacked inode_u;
662 struct posix_acl *acl = NULL;
665 mutex_lock(&inode->ei_update_lock);
669 if (attr->ia_valid & ATTR_UID)
670 qid.q[QTYP_USR] = from_kuid(&init_user_ns, attr->ia_uid);
672 if (attr->ia_valid & ATTR_GID)
673 qid.q[QTYP_GRP] = from_kgid(&init_user_ns, attr->ia_gid);
675 ret = bch2_fs_quota_transfer(c, inode, qid, ~0,
676 KEY_TYPE_QUOTA_PREALLOC);
680 bch2_trans_init(&trans, c, 0, 0);
682 bch2_trans_begin(&trans);
686 ret = bch2_inode_peek(&trans, &inode_iter, &inode_u, inode_inum(inode),
691 bch2_setattr_copy(mnt_userns, inode, &inode_u, attr);
693 if (attr->ia_valid & ATTR_MODE) {
694 ret = bch2_acl_chmod(&trans, inode_inum(inode), &inode_u,
695 inode_u.bi_mode, &acl);
700 ret = bch2_inode_write(&trans, &inode_iter, &inode_u) ?:
701 bch2_trans_commit(&trans, NULL, NULL,
702 BTREE_INSERT_NOFAIL);
704 bch2_trans_iter_exit(&trans, &inode_iter);
706 if (bch2_err_matches(ret, BCH_ERR_transaction_restart))
711 bch2_inode_update_after_write(&trans, inode, &inode_u, attr->ia_valid);
714 set_cached_acl(&inode->v, ACL_TYPE_ACCESS, acl);
716 bch2_trans_exit(&trans);
718 mutex_unlock(&inode->ei_update_lock);
720 return bch2_err_class(ret);
723 static int bch2_getattr(struct user_namespace *mnt_userns,
724 const struct path *path, struct kstat *stat,
725 u32 request_mask, unsigned query_flags)
727 struct bch_inode_info *inode = to_bch_ei(d_inode(path->dentry));
728 struct bch_fs *c = inode->v.i_sb->s_fs_info;
730 stat->dev = inode->v.i_sb->s_dev;
731 stat->ino = inode->v.i_ino;
732 stat->mode = inode->v.i_mode;
733 stat->nlink = inode->v.i_nlink;
734 stat->uid = inode->v.i_uid;
735 stat->gid = inode->v.i_gid;
736 stat->rdev = inode->v.i_rdev;
737 stat->size = i_size_read(&inode->v);
738 stat->atime = inode->v.i_atime;
739 stat->mtime = inode->v.i_mtime;
740 stat->ctime = inode->v.i_ctime;
741 stat->blksize = block_bytes(c);
742 stat->blocks = inode->v.i_blocks;
744 if (request_mask & STATX_BTIME) {
745 stat->result_mask |= STATX_BTIME;
746 stat->btime = bch2_time_to_timespec(c, inode->ei_inode.bi_otime);
749 if (inode->ei_inode.bi_flags & BCH_INODE_IMMUTABLE)
750 stat->attributes |= STATX_ATTR_IMMUTABLE;
751 stat->attributes_mask |= STATX_ATTR_IMMUTABLE;
753 if (inode->ei_inode.bi_flags & BCH_INODE_APPEND)
754 stat->attributes |= STATX_ATTR_APPEND;
755 stat->attributes_mask |= STATX_ATTR_APPEND;
757 if (inode->ei_inode.bi_flags & BCH_INODE_NODUMP)
758 stat->attributes |= STATX_ATTR_NODUMP;
759 stat->attributes_mask |= STATX_ATTR_NODUMP;
764 static int bch2_setattr(struct user_namespace *mnt_userns,
765 struct dentry *dentry, struct iattr *iattr)
767 struct bch_inode_info *inode = to_bch_ei(dentry->d_inode);
770 lockdep_assert_held(&inode->v.i_rwsem);
772 ret = setattr_prepare(mnt_userns, dentry, iattr);
776 return iattr->ia_valid & ATTR_SIZE
777 ? bch2_truncate(mnt_userns, inode, iattr)
778 : bch2_setattr_nonsize(mnt_userns, inode, iattr);
781 static int bch2_tmpfile(struct user_namespace *mnt_userns,
782 struct inode *vdir, struct dentry *dentry, umode_t mode)
784 struct bch_inode_info *inode =
785 __bch2_create(mnt_userns, to_bch_ei(vdir), dentry, mode, 0,
786 (subvol_inum) { 0 }, BCH_CREATE_TMPFILE);
789 return bch2_err_class(PTR_ERR(inode));
791 d_mark_tmpfile(dentry, &inode->v);
792 d_instantiate(dentry, &inode->v);
796 static int bch2_fill_extent(struct bch_fs *c,
797 struct fiemap_extent_info *info,
798 struct bkey_s_c k, unsigned flags)
800 if (bkey_extent_is_direct_data(k.k)) {
801 struct bkey_ptrs_c ptrs = bch2_bkey_ptrs_c(k);
802 const union bch_extent_entry *entry;
803 struct extent_ptr_decoded p;
806 if (k.k->type == KEY_TYPE_reflink_v)
807 flags |= FIEMAP_EXTENT_SHARED;
809 bkey_for_each_ptr_decode(k.k, ptrs, p, entry) {
811 u64 offset = p.ptr.offset;
814 flags2 |= FIEMAP_EXTENT_UNWRITTEN;
816 if (p.crc.compression_type)
817 flags2 |= FIEMAP_EXTENT_ENCODED;
819 offset += p.crc.offset;
821 if ((offset & (block_sectors(c) - 1)) ||
822 (k.k->size & (block_sectors(c) - 1)))
823 flags2 |= FIEMAP_EXTENT_NOT_ALIGNED;
825 ret = fiemap_fill_next_extent(info,
826 bkey_start_offset(k.k) << 9,
828 k.k->size << 9, flags|flags2);
834 } else if (bkey_extent_is_inline_data(k.k)) {
835 return fiemap_fill_next_extent(info,
836 bkey_start_offset(k.k) << 9,
839 FIEMAP_EXTENT_DATA_INLINE);
840 } else if (k.k->type == KEY_TYPE_reservation) {
841 return fiemap_fill_next_extent(info,
842 bkey_start_offset(k.k) << 9,
845 FIEMAP_EXTENT_DELALLOC|
846 FIEMAP_EXTENT_UNWRITTEN);
852 static int bch2_fiemap(struct inode *vinode, struct fiemap_extent_info *info,
855 struct bch_fs *c = vinode->i_sb->s_fs_info;
856 struct bch_inode_info *ei = to_bch_ei(vinode);
857 struct btree_trans trans;
858 struct btree_iter iter;
860 struct bkey_buf cur, prev;
861 struct bpos end = POS(ei->v.i_ino, (start + len) >> 9);
862 unsigned offset_into_extent, sectors;
863 bool have_extent = false;
867 ret = fiemap_prep(&ei->v, info, start, &len, FIEMAP_FLAG_SYNC);
871 if (start + len < start)
876 bch2_bkey_buf_init(&cur);
877 bch2_bkey_buf_init(&prev);
878 bch2_trans_init(&trans, c, 0, 0);
880 bch2_trans_begin(&trans);
882 ret = bch2_subvolume_get_snapshot(&trans, ei->ei_subvol, &snapshot);
886 bch2_trans_iter_init(&trans, &iter, BTREE_ID_extents,
887 SPOS(ei->v.i_ino, start, snapshot), 0);
889 while (!(ret = btree_trans_too_many_iters(&trans)) &&
890 (k = bch2_btree_iter_peek_upto(&iter, end)).k &&
891 !(ret = bkey_err(k))) {
892 enum btree_id data_btree = BTREE_ID_extents;
894 if (!bkey_extent_is_data(k.k) &&
895 k.k->type != KEY_TYPE_reservation) {
896 bch2_btree_iter_advance(&iter);
900 offset_into_extent = iter.pos.offset -
901 bkey_start_offset(k.k);
902 sectors = k.k->size - offset_into_extent;
904 bch2_bkey_buf_reassemble(&cur, c, k);
906 ret = bch2_read_indirect_extent(&trans, &data_btree,
907 &offset_into_extent, &cur);
911 k = bkey_i_to_s_c(cur.k);
912 bch2_bkey_buf_realloc(&prev, c, k.k->u64s);
914 sectors = min(sectors, k.k->size - offset_into_extent);
916 bch2_cut_front(POS(k.k->p.inode,
917 bkey_start_offset(k.k) +
920 bch2_key_resize(&cur.k->k, sectors);
921 cur.k->k.p = iter.pos;
922 cur.k->k.p.offset += cur.k->k.size;
925 ret = bch2_fill_extent(c, info,
926 bkey_i_to_s_c(prev.k), 0);
931 bkey_copy(prev.k, cur.k);
934 bch2_btree_iter_set_pos(&iter,
935 POS(iter.pos.inode, iter.pos.offset + sectors));
937 start = iter.pos.offset;
938 bch2_trans_iter_exit(&trans, &iter);
940 if (bch2_err_matches(ret, BCH_ERR_transaction_restart))
943 if (!ret && have_extent)
944 ret = bch2_fill_extent(c, info, bkey_i_to_s_c(prev.k),
947 bch2_trans_exit(&trans);
948 bch2_bkey_buf_exit(&cur, c);
949 bch2_bkey_buf_exit(&prev, c);
950 return ret < 0 ? ret : 0;
953 static const struct vm_operations_struct bch_vm_ops = {
954 .fault = bch2_page_fault,
955 .map_pages = filemap_map_pages,
956 .page_mkwrite = bch2_page_mkwrite,
959 static int bch2_mmap(struct file *file, struct vm_area_struct *vma)
963 vma->vm_ops = &bch_vm_ops;
969 static loff_t bch2_dir_llseek(struct file *file, loff_t offset, int whence)
971 return generic_file_llseek_size(file, offset, whence,
975 static int bch2_vfs_readdir(struct file *file, struct dir_context *ctx)
977 struct bch_inode_info *inode = file_bch_inode(file);
978 struct bch_fs *c = inode->v.i_sb->s_fs_info;
980 if (!dir_emit_dots(file, ctx))
983 return bch2_readdir(c, inode_inum(inode), ctx);
986 static const struct file_operations bch_file_operations = {
987 .llseek = bch2_llseek,
988 .read_iter = bch2_read_iter,
989 .write_iter = bch2_write_iter,
991 .open = generic_file_open,
993 .splice_read = generic_file_splice_read,
994 .splice_write = iter_file_splice_write,
995 .fallocate = bch2_fallocate_dispatch,
996 .unlocked_ioctl = bch2_fs_file_ioctl,
998 .compat_ioctl = bch2_compat_fs_ioctl,
1000 .remap_file_range = bch2_remap_file_range,
1003 static const struct inode_operations bch_file_inode_operations = {
1004 .getattr = bch2_getattr,
1005 .setattr = bch2_setattr,
1006 .fiemap = bch2_fiemap,
1007 .listxattr = bch2_xattr_list,
1008 #ifdef CONFIG_BCACHEFS_POSIX_ACL
1009 .get_acl = bch2_get_acl,
1010 .set_acl = bch2_set_acl,
1014 static const struct inode_operations bch_dir_inode_operations = {
1015 .lookup = bch2_lookup,
1016 .create = bch2_create,
1018 .unlink = bch2_unlink,
1019 .symlink = bch2_symlink,
1020 .mkdir = bch2_mkdir,
1021 .rmdir = bch2_unlink,
1022 .mknod = bch2_mknod,
1023 .rename = bch2_rename2,
1024 .getattr = bch2_getattr,
1025 .setattr = bch2_setattr,
1026 .tmpfile = bch2_tmpfile,
1027 .listxattr = bch2_xattr_list,
1028 #ifdef CONFIG_BCACHEFS_POSIX_ACL
1029 .get_acl = bch2_get_acl,
1030 .set_acl = bch2_set_acl,
1034 static const struct file_operations bch_dir_file_operations = {
1035 .llseek = bch2_dir_llseek,
1036 .read = generic_read_dir,
1037 .iterate_shared = bch2_vfs_readdir,
1038 .fsync = bch2_fsync,
1039 .unlocked_ioctl = bch2_fs_file_ioctl,
1040 #ifdef CONFIG_COMPAT
1041 .compat_ioctl = bch2_compat_fs_ioctl,
1045 static const struct inode_operations bch_symlink_inode_operations = {
1046 .get_link = page_get_link,
1047 .getattr = bch2_getattr,
1048 .setattr = bch2_setattr,
1049 .listxattr = bch2_xattr_list,
1050 #ifdef CONFIG_BCACHEFS_POSIX_ACL
1051 .get_acl = bch2_get_acl,
1052 .set_acl = bch2_set_acl,
1056 static const struct inode_operations bch_special_inode_operations = {
1057 .getattr = bch2_getattr,
1058 .setattr = bch2_setattr,
1059 .listxattr = bch2_xattr_list,
1060 #ifdef CONFIG_BCACHEFS_POSIX_ACL
1061 .get_acl = bch2_get_acl,
1062 .set_acl = bch2_set_acl,
1066 static const struct address_space_operations bch_address_space_operations = {
1067 .read_folio = bch2_read_folio,
1068 .writepages = bch2_writepages,
1069 .readahead = bch2_readahead,
1070 .dirty_folio = filemap_dirty_folio,
1071 .write_begin = bch2_write_begin,
1072 .write_end = bch2_write_end,
1073 .invalidate_folio = bch2_invalidate_folio,
1074 .release_folio = bch2_release_folio,
1075 .direct_IO = noop_direct_IO,
1076 #ifdef CONFIG_MIGRATION
1077 .migrate_folio = filemap_migrate_folio,
1079 .error_remove_page = generic_error_remove_page,
1082 struct bcachefs_fid {
1088 struct bcachefs_fid_with_parent {
1089 struct bcachefs_fid fid;
1090 struct bcachefs_fid dir;
1093 static int bcachefs_fid_valid(int fh_len, int fh_type)
1096 case FILEID_BCACHEFS_WITHOUT_PARENT:
1097 return fh_len == sizeof(struct bcachefs_fid) / sizeof(u32);
1098 case FILEID_BCACHEFS_WITH_PARENT:
1099 return fh_len == sizeof(struct bcachefs_fid_with_parent) / sizeof(u32);
1105 static struct bcachefs_fid bch2_inode_to_fid(struct bch_inode_info *inode)
1107 return (struct bcachefs_fid) {
1108 .inum = inode->ei_inode.bi_inum,
1109 .subvol = inode->ei_subvol,
1110 .gen = inode->ei_inode.bi_generation,
1114 static int bch2_encode_fh(struct inode *vinode, u32 *fh, int *len,
1117 struct bch_inode_info *inode = to_bch_ei(vinode);
1118 struct bch_inode_info *dir = to_bch_ei(vdir);
1120 if (*len < sizeof(struct bcachefs_fid_with_parent) / sizeof(u32))
1121 return FILEID_INVALID;
1123 if (!S_ISDIR(inode->v.i_mode) && dir) {
1124 struct bcachefs_fid_with_parent *fid = (void *) fh;
1126 fid->fid = bch2_inode_to_fid(inode);
1127 fid->dir = bch2_inode_to_fid(dir);
1129 *len = sizeof(*fid) / sizeof(u32);
1130 return FILEID_BCACHEFS_WITH_PARENT;
1132 struct bcachefs_fid *fid = (void *) fh;
1134 *fid = bch2_inode_to_fid(inode);
1136 *len = sizeof(*fid) / sizeof(u32);
1137 return FILEID_BCACHEFS_WITHOUT_PARENT;
1141 static struct inode *bch2_nfs_get_inode(struct super_block *sb,
1142 struct bcachefs_fid fid)
1144 struct bch_fs *c = sb->s_fs_info;
1145 struct inode *vinode = bch2_vfs_inode_get(c, (subvol_inum) {
1146 .subvol = fid.subvol,
1149 if (!IS_ERR(vinode) && vinode->i_generation != fid.gen) {
1151 vinode = ERR_PTR(-ESTALE);
1156 static struct dentry *bch2_fh_to_dentry(struct super_block *sb, struct fid *_fid,
1157 int fh_len, int fh_type)
1159 struct bcachefs_fid *fid = (void *) _fid;
1161 if (!bcachefs_fid_valid(fh_len, fh_type))
1164 return d_obtain_alias(bch2_nfs_get_inode(sb, *fid));
1167 static struct dentry *bch2_fh_to_parent(struct super_block *sb, struct fid *_fid,
1168 int fh_len, int fh_type)
1170 struct bcachefs_fid_with_parent *fid = (void *) _fid;
1172 if (!bcachefs_fid_valid(fh_len, fh_type) ||
1173 fh_type != FILEID_BCACHEFS_WITH_PARENT)
1176 return d_obtain_alias(bch2_nfs_get_inode(sb, fid->dir));
1179 static struct dentry *bch2_get_parent(struct dentry *child)
1181 struct bch_inode_info *inode = to_bch_ei(child->d_inode);
1182 struct bch_fs *c = inode->v.i_sb->s_fs_info;
1183 subvol_inum parent_inum = {
1184 .subvol = inode->ei_inode.bi_parent_subvol ?:
1186 .inum = inode->ei_inode.bi_dir,
1189 if (!parent_inum.inum)
1192 return d_obtain_alias(bch2_vfs_inode_get(c, parent_inum));
1195 static int bch2_get_name(struct dentry *parent, char *name, struct dentry *child)
1197 struct bch_inode_info *inode = to_bch_ei(child->d_inode);
1198 struct bch_inode_info *dir = to_bch_ei(parent->d_inode);
1199 struct bch_fs *c = inode->v.i_sb->s_fs_info;
1200 struct btree_trans trans;
1201 struct btree_iter iter1;
1202 struct btree_iter iter2;
1204 struct bkey_s_c_dirent d;
1205 struct bch_inode_unpacked inode_u;
1211 if (!S_ISDIR(dir->v.i_mode))
1214 bch2_trans_init(&trans, c, 0, 0);
1216 bch2_trans_iter_init(&trans, &iter1, BTREE_ID_dirents,
1217 POS(dir->ei_inode.bi_inum, 0), 0);
1218 bch2_trans_iter_init(&trans, &iter2, BTREE_ID_dirents,
1219 POS(dir->ei_inode.bi_inum, 0), 0);
1221 bch2_trans_begin(&trans);
1223 ret = bch2_subvolume_get_snapshot(&trans, dir->ei_subvol, &snapshot);
1227 bch2_btree_iter_set_snapshot(&iter1, snapshot);
1228 bch2_btree_iter_set_snapshot(&iter2, snapshot);
1230 ret = bch2_inode_find_by_inum_trans(&trans, inode_inum(inode), &inode_u);
1234 if (inode_u.bi_dir == dir->ei_inode.bi_inum) {
1235 bch2_btree_iter_set_pos(&iter1, POS(inode_u.bi_dir, inode_u.bi_dir_offset));
1237 k = bch2_btree_iter_peek_slot(&iter1);
1242 if (k.k->type != KEY_TYPE_dirent) {
1247 d = bkey_s_c_to_dirent(k);
1248 ret = bch2_dirent_read_target(&trans, inode_inum(dir), d, &target);
1254 if (target.subvol == inode->ei_subvol &&
1255 target.inum == inode->ei_inode.bi_inum)
1259 * File with multiple hardlinks and our backref is to the wrong
1260 * directory - linear search:
1262 for_each_btree_key_continue_norestart(iter2, 0, k, ret) {
1263 if (k.k->p.inode > dir->ei_inode.bi_inum)
1266 if (k.k->type != KEY_TYPE_dirent)
1269 d = bkey_s_c_to_dirent(k);
1270 ret = bch2_dirent_read_target(&trans, inode_inum(dir), d, &target);
1276 if (target.subvol == inode->ei_subvol &&
1277 target.inum == inode->ei_inode.bi_inum)
1285 name_len = min_t(unsigned, bch2_dirent_name_bytes(d), NAME_MAX);
1287 memcpy(name, d.v->d_name, name_len);
1288 name[name_len] = '\0';
1290 if (bch2_err_matches(ret, BCH_ERR_transaction_restart))
1293 bch2_trans_iter_exit(&trans, &iter1);
1294 bch2_trans_iter_exit(&trans, &iter2);
1295 bch2_trans_exit(&trans);
1300 static const struct export_operations bch_export_ops = {
1301 .encode_fh = bch2_encode_fh,
1302 .fh_to_dentry = bch2_fh_to_dentry,
1303 .fh_to_parent = bch2_fh_to_parent,
1304 .get_parent = bch2_get_parent,
1305 .get_name = bch2_get_name,
1308 static void bch2_vfs_inode_init(struct btree_trans *trans, subvol_inum inum,
1309 struct bch_inode_info *inode,
1310 struct bch_inode_unpacked *bi,
1311 struct bch_subvolume *subvol)
1313 bch2_inode_update_after_write(trans, inode, bi, ~0);
1315 if (BCH_SUBVOLUME_SNAP(subvol))
1316 set_bit(EI_INODE_SNAPSHOT, &inode->ei_flags);
1318 clear_bit(EI_INODE_SNAPSHOT, &inode->ei_flags);
1320 inode->v.i_blocks = bi->bi_sectors;
1321 inode->v.i_ino = bi->bi_inum;
1322 inode->v.i_rdev = bi->bi_dev;
1323 inode->v.i_generation = bi->bi_generation;
1324 inode->v.i_size = bi->bi_size;
1326 inode->ei_flags = 0;
1327 inode->ei_quota_reserved = 0;
1328 inode->ei_qid = bch_qid(bi);
1329 inode->ei_subvol = inum.subvol;
1331 inode->v.i_mapping->a_ops = &bch_address_space_operations;
1333 switch (inode->v.i_mode & S_IFMT) {
1335 inode->v.i_op = &bch_file_inode_operations;
1336 inode->v.i_fop = &bch_file_operations;
1339 inode->v.i_op = &bch_dir_inode_operations;
1340 inode->v.i_fop = &bch_dir_file_operations;
1343 inode_nohighmem(&inode->v);
1344 inode->v.i_op = &bch_symlink_inode_operations;
1347 init_special_inode(&inode->v, inode->v.i_mode, inode->v.i_rdev);
1348 inode->v.i_op = &bch_special_inode_operations;
1353 static struct inode *bch2_alloc_inode(struct super_block *sb)
1355 struct bch_inode_info *inode;
1357 inode = kmem_cache_alloc(bch2_inode_cache, GFP_NOFS);
1361 inode_init_once(&inode->v);
1362 mutex_init(&inode->ei_update_lock);
1363 two_state_lock_init(&inode->ei_pagecache_lock);
1364 mutex_init(&inode->ei_quota_lock);
1369 static void bch2_i_callback(struct rcu_head *head)
1371 struct inode *vinode = container_of(head, struct inode, i_rcu);
1372 struct bch_inode_info *inode = to_bch_ei(vinode);
1374 kmem_cache_free(bch2_inode_cache, inode);
1377 static void bch2_destroy_inode(struct inode *vinode)
1379 call_rcu(&vinode->i_rcu, bch2_i_callback);
1382 static int inode_update_times_fn(struct bch_inode_info *inode,
1383 struct bch_inode_unpacked *bi,
1386 struct bch_fs *c = inode->v.i_sb->s_fs_info;
1388 bi->bi_atime = timespec_to_bch2_time(c, inode->v.i_atime);
1389 bi->bi_mtime = timespec_to_bch2_time(c, inode->v.i_mtime);
1390 bi->bi_ctime = timespec_to_bch2_time(c, inode->v.i_ctime);
1395 static int bch2_vfs_write_inode(struct inode *vinode,
1396 struct writeback_control *wbc)
1398 struct bch_fs *c = vinode->i_sb->s_fs_info;
1399 struct bch_inode_info *inode = to_bch_ei(vinode);
1402 mutex_lock(&inode->ei_update_lock);
1403 ret = bch2_write_inode(c, inode, inode_update_times_fn, NULL,
1404 ATTR_ATIME|ATTR_MTIME|ATTR_CTIME);
1405 mutex_unlock(&inode->ei_update_lock);
1407 return bch2_err_class(ret);
1410 static void bch2_evict_inode(struct inode *vinode)
1412 struct bch_fs *c = vinode->i_sb->s_fs_info;
1413 struct bch_inode_info *inode = to_bch_ei(vinode);
1415 truncate_inode_pages_final(&inode->v.i_data);
1417 clear_inode(&inode->v);
1419 BUG_ON(!is_bad_inode(&inode->v) && inode->ei_quota_reserved);
1421 if (!inode->v.i_nlink && !is_bad_inode(&inode->v)) {
1422 bch2_quota_acct(c, inode->ei_qid, Q_SPC, -((s64) inode->v.i_blocks),
1423 KEY_TYPE_QUOTA_WARN);
1424 bch2_quota_acct(c, inode->ei_qid, Q_INO, -1,
1425 KEY_TYPE_QUOTA_WARN);
1426 bch2_inode_rm(c, inode_inum(inode));
1430 void bch2_evict_subvolume_inodes(struct bch_fs *c,
1431 snapshot_id_list *s)
1433 struct super_block *sb = c->vfs_sb;
1434 struct inode *inode;
1436 spin_lock(&sb->s_inode_list_lock);
1437 list_for_each_entry(inode, &sb->s_inodes, i_sb_list) {
1438 if (!snapshot_list_has_id(s, to_bch_ei(inode)->ei_subvol) ||
1439 (inode->i_state & I_FREEING))
1442 d_mark_dontcache(inode);
1443 d_prune_aliases(inode);
1445 spin_unlock(&sb->s_inode_list_lock);
1448 spin_lock(&sb->s_inode_list_lock);
1449 list_for_each_entry(inode, &sb->s_inodes, i_sb_list) {
1450 if (!snapshot_list_has_id(s, to_bch_ei(inode)->ei_subvol) ||
1451 (inode->i_state & I_FREEING))
1454 if (!(inode->i_state & I_DONTCACHE)) {
1455 d_mark_dontcache(inode);
1456 d_prune_aliases(inode);
1459 spin_lock(&inode->i_lock);
1460 if (snapshot_list_has_id(s, to_bch_ei(inode)->ei_subvol) &&
1461 !(inode->i_state & I_FREEING)) {
1462 wait_queue_head_t *wq = bit_waitqueue(&inode->i_state, __I_NEW);
1463 DEFINE_WAIT_BIT(wait, &inode->i_state, __I_NEW);
1464 prepare_to_wait(wq, &wait.wq_entry, TASK_UNINTERRUPTIBLE);
1465 spin_unlock(&inode->i_lock);
1466 spin_unlock(&sb->s_inode_list_lock);
1468 finish_wait(wq, &wait.wq_entry);
1472 spin_unlock(&inode->i_lock);
1474 spin_unlock(&sb->s_inode_list_lock);
1477 static int bch2_statfs(struct dentry *dentry, struct kstatfs *buf)
1479 struct super_block *sb = dentry->d_sb;
1480 struct bch_fs *c = sb->s_fs_info;
1481 struct bch_fs_usage_short usage = bch2_fs_usage_read_short(c);
1482 unsigned shift = sb->s_blocksize_bits - 9;
1484 * this assumes inodes take up 64 bytes, which is a decent average
1487 u64 avail_inodes = ((usage.capacity - usage.used) << 3);
1490 buf->f_type = BCACHEFS_STATFS_MAGIC;
1491 buf->f_bsize = sb->s_blocksize;
1492 buf->f_blocks = usage.capacity >> shift;
1493 buf->f_bfree = usage.free >> shift;
1494 buf->f_bavail = avail_factor(usage.free) >> shift;
1496 buf->f_files = usage.nr_inodes + avail_inodes;
1497 buf->f_ffree = avail_inodes;
1499 fsid = le64_to_cpup((void *) c->sb.user_uuid.b) ^
1500 le64_to_cpup((void *) c->sb.user_uuid.b + sizeof(u64));
1501 buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL;
1502 buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL;
1503 buf->f_namelen = BCH_NAME_MAX;
1508 static int bch2_sync_fs(struct super_block *sb, int wait)
1510 struct bch_fs *c = sb->s_fs_info;
1513 if (c->opts.journal_flush_disabled)
1517 bch2_journal_flush_async(&c->journal, NULL);
1521 ret = bch2_journal_flush(&c->journal);
1522 return bch2_err_class(ret);
1525 static struct bch_fs *bch2_path_to_fs(const char *path)
1531 ret = lookup_bdev(path, &dev);
1533 return ERR_PTR(ret);
1535 c = bch2_dev_to_fs(dev);
1537 closure_put(&c->cl);
1538 return c ?: ERR_PTR(-ENOENT);
1541 static char **split_devs(const char *_dev_name, unsigned *nr)
1543 char *dev_name = NULL, **devs = NULL, *s;
1544 size_t i, nr_devs = 0;
1546 dev_name = kstrdup(_dev_name, GFP_KERNEL);
1550 for (s = dev_name; s; s = strchr(s + 1, ':'))
1553 devs = kcalloc(nr_devs + 1, sizeof(const char *), GFP_KERNEL);
1559 for (i = 0, s = dev_name;
1561 (s = strchr(s, ':')) && (*s++ = '\0'))
1568 static int bch2_remount(struct super_block *sb, int *flags, char *data)
1570 struct bch_fs *c = sb->s_fs_info;
1571 struct bch_opts opts = bch2_opts_empty();
1574 opt_set(opts, read_only, (*flags & SB_RDONLY) != 0);
1576 ret = bch2_parse_mount_opts(c, &opts, data);
1580 if (opts.read_only != c->opts.read_only) {
1581 down_write(&c->state_lock);
1583 if (opts.read_only) {
1584 bch2_fs_read_only(c);
1586 sb->s_flags |= SB_RDONLY;
1588 ret = bch2_fs_read_write(c);
1590 bch_err(c, "error going rw: %i", ret);
1591 up_write(&c->state_lock);
1596 sb->s_flags &= ~SB_RDONLY;
1599 c->opts.read_only = opts.read_only;
1601 up_write(&c->state_lock);
1604 if (opts.errors >= 0)
1605 c->opts.errors = opts.errors;
1607 return bch2_err_class(ret);
1610 static int bch2_show_devname(struct seq_file *seq, struct dentry *root)
1612 struct bch_fs *c = root->d_sb->s_fs_info;
1617 for_each_online_member(ca, c, i) {
1621 seq_puts(seq, "/dev/");
1622 seq_puts(seq, ca->name);
1628 static int bch2_show_options(struct seq_file *seq, struct dentry *root)
1630 struct bch_fs *c = root->d_sb->s_fs_info;
1632 struct printbuf buf = PRINTBUF;
1635 for (i = 0; i < bch2_opts_nr; i++) {
1636 const struct bch_option *opt = &bch2_opt_table[i];
1637 u64 v = bch2_opt_get_by_id(&c->opts, i);
1639 if (!(opt->flags & OPT_MOUNT))
1642 if (v == bch2_opt_get_by_id(&bch2_opts_default, i))
1645 printbuf_reset(&buf);
1646 bch2_opt_to_text(&buf, c, c->disk_sb.sb, opt, v,
1647 OPT_SHOW_MOUNT_STYLE);
1649 seq_puts(seq, buf.buf);
1652 if (buf.allocation_failure)
1654 printbuf_exit(&buf);
1658 static void bch2_put_super(struct super_block *sb)
1660 struct bch_fs *c = sb->s_fs_info;
1665 static const struct super_operations bch_super_operations = {
1666 .alloc_inode = bch2_alloc_inode,
1667 .destroy_inode = bch2_destroy_inode,
1668 .write_inode = bch2_vfs_write_inode,
1669 .evict_inode = bch2_evict_inode,
1670 .sync_fs = bch2_sync_fs,
1671 .statfs = bch2_statfs,
1672 .show_devname = bch2_show_devname,
1673 .show_options = bch2_show_options,
1674 .remount_fs = bch2_remount,
1675 .put_super = bch2_put_super,
1677 .freeze_fs = bch2_freeze,
1678 .unfreeze_fs = bch2_unfreeze,
1682 static int bch2_set_super(struct super_block *s, void *data)
1684 s->s_fs_info = data;
1688 static int bch2_noset_super(struct super_block *s, void *data)
1693 static int bch2_test_super(struct super_block *s, void *data)
1695 struct bch_fs *c = s->s_fs_info;
1696 struct bch_fs **devs = data;
1702 for (i = 0; devs[i]; i++)
1708 static struct dentry *bch2_mount(struct file_system_type *fs_type,
1709 int flags, const char *dev_name, void *data)
1713 struct super_block *sb;
1714 struct inode *vinode;
1715 struct bch_opts opts = bch2_opts_empty();
1717 struct bch_fs **devs_to_fs = NULL;
1718 unsigned i, nr_devs;
1721 opt_set(opts, read_only, (flags & SB_RDONLY) != 0);
1723 ret = bch2_parse_mount_opts(NULL, &opts, data);
1725 return ERR_PTR(ret);
1727 if (!dev_name || strlen(dev_name) == 0)
1728 return ERR_PTR(-EINVAL);
1730 devs = split_devs(dev_name, &nr_devs);
1732 return ERR_PTR(-ENOMEM);
1734 devs_to_fs = kcalloc(nr_devs + 1, sizeof(void *), GFP_KERNEL);
1736 sb = ERR_PTR(-ENOMEM);
1740 for (i = 0; i < nr_devs; i++)
1741 devs_to_fs[i] = bch2_path_to_fs(devs[i]);
1743 sb = sget(fs_type, bch2_test_super, bch2_noset_super,
1744 flags|SB_NOSEC, devs_to_fs);
1748 c = bch2_fs_open(devs, nr_devs, opts);
1754 /* Some options can't be parsed until after the fs is started: */
1755 ret = bch2_parse_mount_opts(c, &opts, data);
1762 bch2_opts_apply(&c->opts, opts);
1764 sb = sget(fs_type, NULL, bch2_set_super, flags|SB_NOSEC, c);
1773 return ERR_CAST(sb);
1778 if ((flags ^ sb->s_flags) & SB_RDONLY) {
1785 sb->s_blocksize = block_bytes(c);
1786 sb->s_blocksize_bits = ilog2(block_bytes(c));
1787 sb->s_maxbytes = MAX_LFS_FILESIZE;
1788 sb->s_op = &bch_super_operations;
1789 sb->s_export_op = &bch_export_ops;
1790 #ifdef CONFIG_BCACHEFS_QUOTA
1791 sb->s_qcop = &bch2_quotactl_operations;
1792 sb->s_quota_types = QTYPE_MASK_USR|QTYPE_MASK_GRP|QTYPE_MASK_PRJ;
1794 sb->s_xattr = bch2_xattr_handlers;
1795 sb->s_magic = BCACHEFS_STATFS_MAGIC;
1796 sb->s_time_gran = c->sb.nsec_per_time_unit;
1797 sb->s_time_min = div_s64(S64_MIN, c->sb.time_units_per_sec) + 1;
1798 sb->s_time_max = div_s64(S64_MAX, c->sb.time_units_per_sec);
1800 strscpy(sb->s_id, c->name, sizeof(sb->s_id));
1802 ret = super_setup_bdi(sb);
1806 sb->s_bdi->ra_pages = VM_READAHEAD_PAGES;
1808 for_each_online_member(ca, c, i) {
1809 struct block_device *bdev = ca->disk_sb.bdev;
1811 /* XXX: create an anonymous device for multi device filesystems */
1813 sb->s_dev = bdev->bd_dev;
1814 percpu_ref_put(&ca->io_ref);
1820 #ifdef CONFIG_BCACHEFS_POSIX_ACL
1822 sb->s_flags |= SB_POSIXACL;
1825 sb->s_shrink.seeks = 0;
1827 vinode = bch2_vfs_inode_get(c, BCACHEFS_ROOT_SUBVOL_INUM);
1828 ret = PTR_ERR_OR_ZERO(vinode);
1830 bch_err(c, "error mounting: error getting root inode: %s", bch2_err_str(ret));
1834 sb->s_root = d_make_root(vinode);
1836 bch_err(c, "error mounting: error allocating root dentry");
1841 sb->s_flags |= SB_ACTIVE;
1843 return dget(sb->s_root);
1846 deactivate_locked_super(sb);
1847 return ERR_PTR(ret);
1850 static void bch2_kill_sb(struct super_block *sb)
1852 struct bch_fs *c = sb->s_fs_info;
1854 generic_shutdown_super(sb);
1858 static struct file_system_type bcache_fs_type = {
1859 .owner = THIS_MODULE,
1861 .mount = bch2_mount,
1862 .kill_sb = bch2_kill_sb,
1863 .fs_flags = FS_REQUIRES_DEV,
1866 MODULE_ALIAS_FS("bcachefs");
1868 void bch2_vfs_exit(void)
1870 unregister_filesystem(&bcache_fs_type);
1871 kmem_cache_destroy(bch2_inode_cache);
1874 int __init bch2_vfs_init(void)
1878 bch2_inode_cache = KMEM_CACHE(bch_inode_info, 0);
1879 if (!bch2_inode_cache)
1882 ret = register_filesystem(&bcache_fs_type);
1892 #endif /* NO_BCACHEFS_FS */