Merge tag 'v6.12-rc2' into test2

Linux 6.12-rc2

Resolved movement of asm/unaligned.h to linux/unaligned.h

1 files changed, 124 insertions, 70 deletions

diff --git a/fs/bcachefs/fsck.c b/fs/bcachefs/fsck.c
index 0d8b782b63fb..b8a6ceb0cc7a 100644
--- a/fs/bcachefs/fsck.c
+++ b/fs/bcachefs/fsck.c
@@ -28,8 +28,8 @@ static bool inode_points_to_dirent(struct bch_inode_unpacked *inode,
 		inode->bi_dir_offset	== d.k->p.offset;
 }
 
-static bool dirent_points_to_inode_nowarn(struct bkey_s_c_dirent d,
-				   struct bch_inode_unpacked *inode)
+static int dirent_points_to_inode_nowarn(struct bkey_s_c_dirent d,
+					 struct bch_inode_unpacked *inode)
 {
 	if (d.v->d_type == DT_SUBVOL
 	    ? le32_to_cpu(d.v->d_child_subvol)	== inode->bi_subvol
@@ -137,16 +137,15 @@ found:
 	return ret;
 }
 
-static int lookup_inode(struct btree_trans *trans, u64 inode_nr,
-			struct bch_inode_unpacked *inode,
-			u32 *snapshot)
+static int lookup_inode(struct btree_trans *trans, u64 inode_nr, u32 snapshot,
+			struct bch_inode_unpacked *inode)
 {
 	struct btree_iter iter;
 	struct bkey_s_c k;
 	int ret;
 
 	k = bch2_bkey_get_iter(trans, &iter, BTREE_ID_inodes,
-			       SPOS(0, inode_nr, *snapshot), 0);
+			       SPOS(0, inode_nr, snapshot), 0);
 	ret = bkey_err(k);
 	if (ret)
 		goto err;
@@ -154,8 +153,6 @@ static int lookup_inode(struct btree_trans *trans, u64 inode_nr,
 	ret = bkey_is_inode(k.k)
 		? bch2_inode_unpack(k, inode)
 		: -BCH_ERR_ENOENT_inode;
-	if (!ret)
-		*snapshot = iter.pos.snapshot;
 err:
 	bch2_trans_iter_exit(trans, &iter);
 	return ret;
@@ -250,8 +247,7 @@ static int lookup_lostfound(struct btree_trans *trans, u32 snapshot,
 
 	struct bch_inode_unpacked root_inode;
 	struct bch_hash_info root_hash_info;
-	u32 root_inode_snapshot = snapshot;
-	ret = lookup_inode(trans, root_inum.inum, &root_inode, &root_inode_snapshot);
+	ret = lookup_inode(trans, root_inum.inum, snapshot, &root_inode);
 	bch_err_msg(c, ret, "looking up root inode %llu for subvol %u",
 		    root_inum.inum, le32_to_cpu(st.master_subvol));
 	if (ret)
@@ -277,17 +273,23 @@ static int lookup_lostfound(struct btree_trans *trans, u32 snapshot,
 	 * The bch2_check_dirents pass has already run, dangling dirents
 	 * shouldn't exist here:
 	 */
-	ret = lookup_inode(trans, inum, lostfound, &snapshot);
+	ret = lookup_inode(trans, inum, snapshot, lostfound);
 	bch_err_msg(c, ret, "looking up lost+found %llu:%u in (root inode %llu, snapshot root %u)",
 		    inum, snapshot, root_inum.inum, bch2_snapshot_root(c, snapshot));
 	return ret;
 
 create_lostfound:
 	/*
+	 * we always create lost+found in the root snapshot; we don't want
+	 * different branches of the snapshot tree to have different lost+found
+	 */
+	snapshot = le32_to_cpu(st.root_snapshot);
+	/*
 	 * XXX: we could have a nicer log message here  if we had a nice way to
 	 * walk backpointers to print a path
 	 */
-	bch_notice(c, "creating lost+found in snapshot %u", le32_to_cpu(st.root_snapshot));
+	bch_notice(c, "creating lost+found in subvol %llu snapshot %u",
+		   root_inum.subvol, le32_to_cpu(st.root_snapshot));
 
 	u64 now = bch2_current_time(c);
 	struct btree_iter lostfound_iter = { NULL };
@@ -296,6 +298,7 @@ create_lostfound:
 	bch2_inode_init_early(c, lostfound);
 	bch2_inode_init_late(lostfound, now, 0, 0, S_IFDIR|0700, 0, &root_inode);
 	lostfound->bi_dir = root_inode.bi_inum;
+	lostfound->bi_snapshot = le32_to_cpu(st.root_snapshot);
 
 	root_inode.bi_nlink++;
 
@@ -323,9 +326,7 @@ err:
 	return ret;
 }
 
-static int reattach_inode(struct btree_trans *trans,
-			  struct bch_inode_unpacked *inode,
-			  u32 inode_snapshot)
+static int reattach_inode(struct btree_trans *trans, struct bch_inode_unpacked *inode)
 {
 	struct bch_fs *c = trans->c;
 	struct bch_hash_info dir_hash;
@@ -333,7 +334,7 @@ static int reattach_inode(struct btree_trans *trans,
 	char name_buf[20];
 	struct qstr name;
 	u64 dir_offset = 0;
-	u32 dirent_snapshot = inode_snapshot;
+	u32 dirent_snapshot = inode->bi_snapshot;
 	int ret;
 
 	if (inode->bi_subvol) {
@@ -354,14 +355,18 @@ static int reattach_inode(struct btree_trans *trans,
 	if (ret)
 		return ret;
 
-	if (S_ISDIR(inode->bi_mode)) {
-		lostfound.bi_nlink++;
+	lostfound.bi_nlink += S_ISDIR(inode->bi_mode);
 
-		ret = __bch2_fsck_write_inode(trans, &lostfound, U32_MAX);
-		if (ret)
-			return ret;
+	/* ensure lost+found inode is also present in inode snapshot */
+	if (!inode->bi_subvol) {
+		BUG_ON(!bch2_snapshot_is_ancestor(c, inode->bi_snapshot, lostfound.bi_snapshot));
+		lostfound.bi_snapshot = inode->bi_snapshot;
 	}
 
+	ret = __bch2_fsck_write_inode(trans, &lostfound);
+	if (ret)
+		return ret;
+
 	dir_hash = bch2_hash_info_init(c, &lostfound);
 
 	name = (struct qstr) QSTR(name_buf);
@@ -383,7 +388,7 @@ static int reattach_inode(struct btree_trans *trans,
 	inode->bi_dir		= lostfound.bi_inum;
 	inode->bi_dir_offset	= dir_offset;
 
-	return __bch2_fsck_write_inode(trans, inode, inode_snapshot);
+	return __bch2_fsck_write_inode(trans, inode);
 }
 
 static int remove_backpointer(struct btree_trans *trans,
@@ -422,7 +427,7 @@ static int reattach_subvol(struct btree_trans *trans, struct bkey_s_c_subvolume
 	if (ret)
 		return ret;
 
-	ret = reattach_inode(trans, &inode, le32_to_cpu(s.v->snapshot));
+	ret = reattach_inode(trans, &inode);
 	bch_err_msg(c, ret, "reattaching inode %llu", inode.bi_inum);
 	return ret;
 }
@@ -540,8 +545,9 @@ static int reconstruct_inode(struct btree_trans *trans, enum btree_id btree, u32
 	bch2_inode_init_late(&new_inode, bch2_current_time(c), 0, 0, i_mode|0600, 0, NULL);
 	new_inode.bi_size = i_size;
 	new_inode.bi_inum = inum;
+	new_inode.bi_snapshot = snapshot;
 
-	return __bch2_fsck_write_inode(trans, &new_inode, snapshot);
+	return __bch2_fsck_write_inode(trans, &new_inode);
 }
 
 struct snapshots_seen {
@@ -1024,6 +1030,7 @@ static int check_inode(struct btree_trans *trans,
 		       bool full)
 {
 	struct bch_fs *c = trans->c;
+	struct printbuf buf = PRINTBUF;
 	struct bch_inode_unpacked u;
 	bool do_update = false;
 	int ret;
@@ -1057,7 +1064,41 @@ static int check_inode(struct btree_trans *trans,
 			trans, inode_snapshot_mismatch,
 			"inodes in different snapshots don't match")) {
 		bch_err(c, "repair not implemented yet");
-		return -BCH_ERR_fsck_repair_unimplemented;
+		ret = -BCH_ERR_fsck_repair_unimplemented;
+		goto err_noprint;
+	}
+
+	if (u.bi_dir || u.bi_dir_offset) {
+		ret = check_inode_dirent_inode(trans, &u, &do_update);
+		if (ret)
+			goto err;
+	}
+
+	if (fsck_err_on(u.bi_dir && (u.bi_flags & BCH_INODE_unlinked),
+			trans, inode_unlinked_but_has_dirent,
+			"inode unlinked but has dirent\n%s",
+			(printbuf_reset(&buf),
+			 bch2_inode_unpacked_to_text(&buf, &u),
+			 buf.buf))) {
+		u.bi_flags &= ~BCH_INODE_unlinked;
+		do_update = true;
+	}
+
+	if (S_ISDIR(u.bi_mode) && (u.bi_flags & BCH_INODE_unlinked)) {
+		/* Check for this early so that check_unreachable_inode() will reattach it */
+
+		ret = bch2_empty_dir_snapshot(trans, k.k->p.offset, 0, k.k->p.snapshot);
+		if (ret && ret != -BCH_ERR_ENOTEMPTY_dir_not_empty)
+			goto err;
+
+		fsck_err_on(ret, trans, inode_dir_unlinked_but_not_empty,
+			    "dir unlinked but not empty\n%s",
+			    (printbuf_reset(&buf),
+			     bch2_inode_unpacked_to_text(&buf, &u),
+			     buf.buf));
+		u.bi_flags &= ~BCH_INODE_unlinked;
+		do_update = true;
+		ret = 0;
 	}
 
 	if ((u.bi_flags & (BCH_INODE_i_size_dirty|BCH_INODE_unlinked)) &&
@@ -1070,15 +1111,15 @@ static int check_inode(struct btree_trans *trans,
 
 		u.bi_flags &= ~BCH_INODE_i_size_dirty|BCH_INODE_unlinked;
 
-		ret = __bch2_fsck_write_inode(trans, &u, iter->pos.snapshot);
+		ret = __bch2_fsck_write_inode(trans, &u);
 
 		bch_err_msg(c, ret, "in fsck updating inode");
 		if (ret)
-			return ret;
+			goto err_noprint;
 
 		if (!bpos_eq(new_min_pos, POS_MIN))
 			bch2_btree_iter_set_pos(iter, bpos_predecessor(new_min_pos));
-		return 0;
+		goto err_noprint;
 	}
 
 	if (u.bi_flags & BCH_INODE_unlinked) {
@@ -1095,7 +1136,7 @@ static int check_inode(struct btree_trans *trans,
 			 */
 			ret = check_inode_deleted_list(trans, k.k->p);
 			if (ret < 0)
-				return ret;
+				goto err_noprint;
 
 			fsck_err_on(!ret,
 				    trans, unlinked_inode_not_on_deleted_list,
@@ -1106,13 +1147,13 @@ static int check_inode(struct btree_trans *trans,
 			if (ret)
 				goto err;
 		} else {
-			if (fsck_err_on(bch2_inode_is_open(c, k.k->p),
+			if (fsck_err_on(!bch2_inode_is_open(c, k.k->p),
 					trans, inode_unlinked_and_not_open,
 				      "inode %llu%u unlinked and not open",
 				      u.bi_inum, u.bi_snapshot)) {
 				ret = bch2_inode_rm_snapshot(trans, u.bi_inum, iter->pos.snapshot);
 				bch_err_msg(c, ret, "in fsck deleting inode");
-				return ret;
+				goto err_noprint;
 			}
 		}
 	}
@@ -1177,12 +1218,6 @@ static int check_inode(struct btree_trans *trans,
 		do_update = true;
 	}
 
-	if (u.bi_dir || u.bi_dir_offset) {
-		ret = check_inode_dirent_inode(trans, &u, &do_update);
-		if (ret)
-			goto err;
-	}
-
 	if (fsck_err_on(u.bi_parent_subvol &&
 			(u.bi_subvol == 0 ||
 			 u.bi_subvol == BCACHEFS_ROOT_SUBVOL),
@@ -1224,14 +1259,16 @@ static int check_inode(struct btree_trans *trans,
 	}
 do_update:
 	if (do_update) {
-		ret = __bch2_fsck_write_inode(trans, &u, iter->pos.snapshot);
+		ret = __bch2_fsck_write_inode(trans, &u);
 		bch_err_msg(c, ret, "in fsck updating inode");
 		if (ret)
-			return ret;
+			goto err_noprint;
 	}
 err:
 fsck_err:
 	bch_err_fn(c, ret);
+err_noprint:
+	printbuf_exit(&buf);
 	return ret;
 }
 
@@ -1347,7 +1384,7 @@ static int check_i_sectors_notnested(struct btree_trans *trans, struct inode_wal
 				w->last_pos.inode, i->snapshot,
 				i->inode.bi_sectors, i->count)) {
 			i->inode.bi_sectors = i->count;
-			ret = bch2_fsck_write_inode(trans, &i->inode, i->snapshot);
+			ret = bch2_fsck_write_inode(trans, &i->inode);
 			if (ret)
 				break;
 		}
@@ -1789,7 +1826,7 @@ static int check_subdir_count_notnested(struct btree_trans *trans, struct inode_
 				"directory %llu:%u with wrong i_nlink: got %u, should be %llu",
 				w->last_pos.inode, i->snapshot, i->inode.bi_nlink, i->count)) {
 			i->inode.bi_nlink = i->count;
-			ret = bch2_fsck_write_inode(trans, &i->inode, i->snapshot);
+			ret = bch2_fsck_write_inode(trans, &i->inode);
 			if (ret)
 				break;
 		}
@@ -1810,8 +1847,7 @@ noinline_for_stack
 static int check_dirent_inode_dirent(struct btree_trans *trans,
 				   struct btree_iter *iter,
 				   struct bkey_s_c_dirent d,
-				   struct bch_inode_unpacked *target,
-				   u32 target_snapshot)
+				   struct bch_inode_unpacked *target)
 {
 	struct bch_fs *c = trans->c;
 	struct printbuf buf = PRINTBUF;
@@ -1821,6 +1857,32 @@ static int check_dirent_inode_dirent(struct btree_trans *trans,
 	if (inode_points_to_dirent(target, d))
 		return 0;
 
+	if (!target->bi_dir &&
+	    !target->bi_dir_offset) {
+		fsck_err_on(S_ISDIR(target->bi_mode),
+			    trans, inode_dir_missing_backpointer,
+			    "directory with missing backpointer\n%s",
+			    (printbuf_reset(&buf),
+			     bch2_bkey_val_to_text(&buf, c, d.s_c),
+			     prt_printf(&buf, "\n"),
+			     bch2_inode_unpacked_to_text(&buf, target),
+			     buf.buf));
+
+		fsck_err_on(target->bi_flags & BCH_INODE_unlinked,
+			    trans, inode_unlinked_but_has_dirent,
+			    "inode unlinked but has dirent\n%s",
+			    (printbuf_reset(&buf),
+			     bch2_bkey_val_to_text(&buf, c, d.s_c),
+			     prt_printf(&buf, "\n"),
+			     bch2_inode_unpacked_to_text(&buf, target),
+			     buf.buf));
+
+		target->bi_flags &= ~BCH_INODE_unlinked;
+		target->bi_dir		= d.k->p.inode;
+		target->bi_dir_offset	= d.k->p.offset;
+		return __bch2_fsck_write_inode(trans, target);
+	}
+
 	if (bch2_inode_should_have_bp(target) &&
 	    !fsck_err(trans, inode_wrong_backpointer,
 		      "dirent points to inode that does not point back:\n  %s",
@@ -1830,15 +1892,8 @@ static int check_dirent_inode_dirent(struct btree_trans *trans,
 		       buf.buf)))
 		goto err;
 
-	if (!target->bi_dir &&
-	    !target->bi_dir_offset) {
-		target->bi_dir		= d.k->p.inode;
-		target->bi_dir_offset	= d.k->p.offset;
-		return __bch2_fsck_write_inode(trans, target, target_snapshot);
-	}
-
 	struct bkey_s_c_dirent bp_dirent = dirent_get_by_pos(trans, &bp_iter,
-			      SPOS(target->bi_dir, target->bi_dir_offset, target_snapshot));
+			      SPOS(target->bi_dir, target->bi_dir_offset, target->bi_snapshot));
 	ret = bkey_err(bp_dirent);
 	if (ret && !bch2_err_matches(ret, ENOENT))
 		goto err;
@@ -1851,14 +1906,14 @@ static int check_dirent_inode_dirent(struct btree_trans *trans,
 			"inode %llu:%u has wrong backpointer:\n"
 			"got       %llu:%llu\n"
 			"should be %llu:%llu",
-			target->bi_inum, target_snapshot,
+			target->bi_inum, target->bi_snapshot,
 			target->bi_dir,
 			target->bi_dir_offset,
 			d.k->p.inode,
 			d.k->p.offset)) {
 		target->bi_dir		= d.k->p.inode;
 		target->bi_dir_offset	= d.k->p.offset;
-		ret = __bch2_fsck_write_inode(trans, target, target_snapshot);
+		ret = __bch2_fsck_write_inode(trans, target);
 		goto out;
 	}
 
@@ -1873,7 +1928,7 @@ static int check_dirent_inode_dirent(struct btree_trans *trans,
 			trans, inode_dir_multiple_links,
 			"%s %llu:%u with multiple links\n%s",
 			S_ISDIR(target->bi_mode) ? "directory" : "subvolume",
-			target->bi_inum, target_snapshot, buf.buf)) {
+			target->bi_inum, target->bi_snapshot, buf.buf)) {
 		ret = __remove_dirent(trans, d.k->p);
 		goto out;
 	}
@@ -1886,10 +1941,10 @@ static int check_dirent_inode_dirent(struct btree_trans *trans,
 	if (fsck_err_on(backpointer_exists && !target->bi_nlink,
 			trans, inode_multiple_links_but_nlink_0,
 			"inode %llu:%u type %s has multiple links but i_nlink 0\n%s",
-			target->bi_inum, target_snapshot, bch2_d_types[d.v->d_type], buf.buf)) {
+			target->bi_inum, target->bi_snapshot, bch2_d_types[d.v->d_type], buf.buf)) {
 		target->bi_nlink++;
 		target->bi_flags &= ~BCH_INODE_unlinked;
-		ret = __bch2_fsck_write_inode(trans, target, target_snapshot);
+		ret = __bch2_fsck_write_inode(trans, target);
 		if (ret)
 			goto err;
 	}
@@ -1906,15 +1961,14 @@ noinline_for_stack
 static int check_dirent_target(struct btree_trans *trans,
 			       struct btree_iter *iter,
 			       struct bkey_s_c_dirent d,
-			       struct bch_inode_unpacked *target,
-			       u32 target_snapshot)
+			       struct bch_inode_unpacked *target)
 {
 	struct bch_fs *c = trans->c;
 	struct bkey_i_dirent *n;
 	struct printbuf buf = PRINTBUF;
 	int ret = 0;
 
-	ret = check_dirent_inode_dirent(trans, iter, d, target, target_snapshot);
+	ret = check_dirent_inode_dirent(trans, iter, d, target);
 	if (ret)
 		goto err;
 
@@ -2073,7 +2127,7 @@ static int check_dirent_to_subvol(struct btree_trans *trans, struct btree_iter *
 	u64 target_inum = le64_to_cpu(s.v->inode);
 	u32 target_snapshot = le32_to_cpu(s.v->snapshot);
 
-	ret = lookup_inode(trans, target_inum, &subvol_root, &target_snapshot);
+	ret = lookup_inode(trans, target_inum, target_snapshot, &subvol_root);
 	if (ret && !bch2_err_matches(ret, ENOENT))
 		goto err;
 
@@ -2089,13 +2143,13 @@ static int check_dirent_to_subvol(struct btree_trans *trans, struct btree_iter *
 			target_inum,
 			subvol_root.bi_parent_subvol, parent_subvol)) {
 		subvol_root.bi_parent_subvol = parent_subvol;
-		ret = __bch2_fsck_write_inode(trans, &subvol_root, target_snapshot);
+		subvol_root.bi_snapshot = le32_to_cpu(s.v->snapshot);
+		ret = __bch2_fsck_write_inode(trans, &subvol_root);
 		if (ret)
 			goto err;
 	}
 
-	ret = check_dirent_target(trans, iter, d, &subvol_root,
-				  target_snapshot);
+	ret = check_dirent_target(trans, iter, d, &subvol_root);
 	if (ret)
 		goto err;
 out:
@@ -2188,8 +2242,7 @@ static int check_dirent(struct btree_trans *trans, struct btree_iter *iter,
 		}
 
 		darray_for_each(target->inodes, i) {
-			ret = check_dirent_target(trans, iter, d,
-						  &i->inode, i->snapshot);
+			ret = check_dirent_target(trans, iter, d, &i->inode);
 			if (ret)
 				goto err;
 		}
@@ -2330,7 +2383,7 @@ static int check_root_trans(struct btree_trans *trans)
 			goto err;
 	}
 
-	ret = lookup_inode(trans, BCACHEFS_ROOT_INO, &root_inode, &snapshot);
+	ret = lookup_inode(trans, BCACHEFS_ROOT_INO, snapshot, &root_inode);
 	if (ret && !bch2_err_matches(ret, ENOENT))
 		return ret;
 
@@ -2343,8 +2396,9 @@ static int check_root_trans(struct btree_trans *trans)
 		bch2_inode_init(c, &root_inode, 0, 0, S_IFDIR|0755,
 				0, NULL);
 		root_inode.bi_inum = inum;
+		root_inode.bi_snapshot = snapshot;
 
-		ret = __bch2_fsck_write_inode(trans, &root_inode, snapshot);
+		ret = __bch2_fsck_write_inode(trans, &root_inode);
 		bch_err_msg(c, ret, "writing root inode");
 	}
 err:
@@ -2511,7 +2565,7 @@ static int check_path(struct btree_trans *trans, pathbuf *p, struct bkey_s_c ino
 				     (printbuf_reset(&buf),
 				      bch2_bkey_val_to_text(&buf, c, inode_k),
 				      buf.buf)))
-				ret = reattach_inode(trans, &inode, snapshot);
+				ret = reattach_inode(trans, &inode);
 			goto out;
 		}
 
@@ -2557,7 +2611,7 @@ static int check_path(struct btree_trans *trans, pathbuf *p, struct bkey_s_c ino
 				if (ret)
 					break;
 
-				ret = reattach_inode(trans, &inode, snapshot);
+				ret = reattach_inode(trans, &inode);
 				bch_err_msg(c, ret, "reattaching inode %llu", inode.bi_inum);
 			}
 			break;
@@ -2787,7 +2841,7 @@ static int check_nlinks_update_inode(struct btree_trans *trans, struct btree_ite
 			u.bi_inum, bch2_d_types[mode_to_type(u.bi_mode)],
 			bch2_inode_nlink_get(&u), link->count)) {
 		bch2_inode_nlink_set(&u, link->count);
-		ret = __bch2_fsck_write_inode(trans, &u, k.k->p.snapshot);
+		ret = __bch2_fsck_write_inode(trans, &u);
 	}
 fsck_err:
 	return ret;