217 	struct btrfs_root *root = ip->root;  in btrfs_ioctl_setflags()  local
228 	if (btrfs_root_readonly(root))  in btrfs_ioctl_setflags()
325 		if (root->fs_info->compress_type == BTRFS_COMPRESS_LZO)  in btrfs_ioctl_setflags()
341 	trans = btrfs_start_transaction(root, 1);  in btrfs_ioctl_setflags()
350 	ret = btrfs_update_inode(trans, root, inode);  in btrfs_ioctl_setflags()
352 	btrfs_end_transaction(trans, root);  in btrfs_ioctl_setflags()
442 	struct btrfs_root *root = BTRFS_I(dir)->root;  in create_subvol()  local
455 	ret = btrfs_find_free_objectid(root->fs_info->tree_root, &objectid);  in create_subvol()
471 	ret = btrfs_subvolume_reserve_metadata(root, &block_rsv,  in create_subvol()
476 	trans = btrfs_start_transaction(root, 0);  in create_subvol()
479 		btrfs_subvolume_release_metadata(root, &block_rsv,  in create_subvol()
486 	ret = btrfs_qgroup_inherit(trans, root->fs_info, 0, objectid, inherit);  in create_subvol()
490 	leaf = btrfs_alloc_tree_block(trans, root, 0, objectid, NULL, 0, 0, 0);  in create_subvol()
502 	write_extent_buffer(leaf, root->fs_info->fsid, btrfs_header_fsid(),  in create_subvol()
504 	write_extent_buffer(leaf, root->fs_info->chunk_tree_uuid,  in create_subvol()
515 	btrfs_set_stack_inode_nbytes(inode_item, root->nodesize);  in create_subvol()
548 	ret = btrfs_insert_root(trans, root->fs_info->tree_root, &key,  in create_subvol()
554 	new_root = btrfs_read_fs_root_no_name(root->fs_info, &key);  in create_subvol()
556 		btrfs_abort_transaction(trans, root, PTR_ERR(new_root));  in create_subvol()
563 	ret = btrfs_create_subvol_root(trans, new_root, root, new_dirid);  in create_subvol()
566 		btrfs_abort_transaction(trans, root, ret);  in create_subvol()
579 		btrfs_abort_transaction(trans, root, ret);  in create_subvol()
583 	ret = btrfs_insert_dir_item(trans, root,  in create_subvol()
587 		btrfs_abort_transaction(trans, root, ret);  in create_subvol()
592 	ret = btrfs_update_inode(trans, root, dir);  in create_subvol()
595 	ret = btrfs_add_root_ref(trans, root->fs_info->tree_root,  in create_subvol()
596 				 objectid, root->root_key.objectid,  in create_subvol()
600 	ret = btrfs_uuid_tree_add(trans, root->fs_info->uuid_root,  in create_subvol()
604 		btrfs_abort_transaction(trans, root, ret);  in create_subvol()
609 	btrfs_subvolume_release_metadata(root, &block_rsv, qgroup_reserved);  in create_subvol()
613 		err = btrfs_commit_transaction_async(trans, root, 1);  in create_subvol()
615 			err = btrfs_commit_transaction(trans, root);  in create_subvol()
617 		err = btrfs_commit_transaction(trans, root);  in create_subvol()
631 static void btrfs_wait_for_no_snapshoting_writes(struct btrfs_root *root)  in btrfs_wait_for_no_snapshoting_writes()  argument
637 		prepare_to_wait(&root->subv_writers->wait, &wait,  in btrfs_wait_for_no_snapshoting_writes()
640 		writers = percpu_counter_sum(&root->subv_writers->counter);  in btrfs_wait_for_no_snapshoting_writes()
644 		finish_wait(&root->subv_writers->wait, &wait);  in btrfs_wait_for_no_snapshoting_writes()
648 static int create_snapshot(struct btrfs_root *root, struct inode *dir,  in create_snapshot()  argument
658 	if (!test_bit(BTRFS_ROOT_REF_COWS, &root->state))  in create_snapshot()
661 	atomic_inc(&root->will_be_snapshoted);  in create_snapshot()
663 	btrfs_wait_for_no_snapshoting_writes(root);  in create_snapshot()
665 	ret = btrfs_start_delalloc_inodes(root, 0);  in create_snapshot()
669 	btrfs_wait_ordered_extents(root, -1);  in create_snapshot()
687 	ret = btrfs_subvolume_reserve_metadata(BTRFS_I(dir)->root,  in create_snapshot()
695 	pending_snapshot->root = root;  in create_snapshot()
700 	trans = btrfs_start_transaction(root, 0);  in create_snapshot()
706 	spin_lock(&root->fs_info->trans_lock);  in create_snapshot()
709 	spin_unlock(&root->fs_info->trans_lock);  in create_snapshot()
713 				     root->fs_info->extent_root, 1);  in create_snapshot()
715 			ret = btrfs_commit_transaction(trans, root);  in create_snapshot()
718 					       root->fs_info->extent_root);  in create_snapshot()
740 	btrfs_subvolume_release_metadata(BTRFS_I(dir)->root,  in create_snapshot()
746 	if (atomic_dec_and_test(&root->will_be_snapshoted))  in create_snapshot()
747 		wake_up_atomic_t(&root->will_be_snapshoted);  in create_snapshot()
849 	error = btrfs_check_dir_item_collision(BTRFS_I(dir)->root,  in btrfs_mksubvol()
855 	down_read(&BTRFS_I(dir)->root->fs_info->subvol_sem);  in btrfs_mksubvol()
857 	if (btrfs_root_refs(&BTRFS_I(dir)->root->root_item) == 0)  in btrfs_mksubvol()
870 	up_read(&BTRFS_I(dir)->root->fs_info->subvol_sem);  in btrfs_mksubvol()
918 static int find_new_extents(struct btrfs_root *root,  in find_new_extents()  argument
939 		ret = btrfs_search_forward(root, &min_key, path, newer_than);  in find_new_extents()
1246 	struct btrfs_root *root = BTRFS_I(inode)->root;  in btrfs_defrag_file()  local
1310 		ret = find_new_extents(root, inode, newer_than,  in btrfs_defrag_file()
1343 		if (btrfs_defrag_cancelled(root->fs_info)) {  in btrfs_defrag_file()
1401 			ret = find_new_extents(root, inode,  in btrfs_defrag_file()
1433 		atomic_inc(&root->fs_info->async_submit_draining);  in btrfs_defrag_file()
1434 		while (atomic_read(&root->fs_info->nr_async_submits) ||  in btrfs_defrag_file()
1435 		      atomic_read(&root->fs_info->async_delalloc_pages)) {  in btrfs_defrag_file()
1436 			wait_event(root->fs_info->async_submit_wait,  in btrfs_defrag_file()
1437 			   (atomic_read(&root->fs_info->nr_async_submits) == 0 &&  in btrfs_defrag_file()
1438 			    atomic_read(&root->fs_info->async_delalloc_pages) == 0));  in btrfs_defrag_file()
1440 		atomic_dec(&root->fs_info->async_submit_draining);  in btrfs_defrag_file()
1444 		btrfs_set_fs_incompat(root->fs_info, COMPRESS_LZO);  in btrfs_defrag_file()
1467 	struct btrfs_root *root = BTRFS_I(file_inode(file))->root;  in btrfs_ioctl_resize()  local
1484 	if (atomic_xchg(&root->fs_info->mutually_exclusive_operation_running,  in btrfs_ioctl_resize()
1490 	mutex_lock(&root->fs_info->volume_mutex);  in btrfs_ioctl_resize()
1512 		btrfs_info(root->fs_info, "resizing devid %llu", devid);  in btrfs_ioctl_resize()
1515 	device = btrfs_find_device(root->fs_info, devid, NULL, NULL);  in btrfs_ioctl_resize()
1517 		btrfs_info(root->fs_info, "resizer unable to find device %llu",  in btrfs_ioctl_resize()
1524 		btrfs_info(root->fs_info,  in btrfs_ioctl_resize()
1578 	new_size = div_u64(new_size, root->sectorsize);  in btrfs_ioctl_resize()
1579 	new_size *= root->sectorsize;  in btrfs_ioctl_resize()
1585 		trans = btrfs_start_transaction(root, 0);  in btrfs_ioctl_resize()
1591 		btrfs_commit_transaction(trans, root);  in btrfs_ioctl_resize()
1599 	mutex_unlock(&root->fs_info->volume_mutex);  in btrfs_ioctl_resize()
1600 	atomic_set(&root->fs_info->mutually_exclusive_operation_running, 0);  in btrfs_ioctl_resize()
1642 			btrfs_info(BTRFS_I(src_inode)->root->fs_info,  in btrfs_ioctl_snap_create_transid()
1653 					     BTRFS_I(src_inode)->root,  in btrfs_ioctl_snap_create_transid()
1744 	struct btrfs_root *root = BTRFS_I(inode)->root;  in btrfs_ioctl_subvol_getflags()  local
1751 	down_read(&root->fs_info->subvol_sem);  in btrfs_ioctl_subvol_getflags()
1752 	if (btrfs_root_readonly(root))  in btrfs_ioctl_subvol_getflags()
1754 	up_read(&root->fs_info->subvol_sem);  in btrfs_ioctl_subvol_getflags()
1766 	struct btrfs_root *root = BTRFS_I(inode)->root;  in btrfs_ioctl_subvol_setflags()  local
1799 	down_write(&root->fs_info->subvol_sem);  in btrfs_ioctl_subvol_setflags()
1802 	if (!!(flags & BTRFS_SUBVOL_RDONLY) == btrfs_root_readonly(root))  in btrfs_ioctl_subvol_setflags()
1805 	root_flags = btrfs_root_flags(&root->root_item);  in btrfs_ioctl_subvol_setflags()
1807 		btrfs_set_root_flags(&root->root_item,  in btrfs_ioctl_subvol_setflags()
1814 		spin_lock(&root->root_item_lock);  in btrfs_ioctl_subvol_setflags()
1815 		if (root->send_in_progress == 0) {  in btrfs_ioctl_subvol_setflags()
1816 			btrfs_set_root_flags(&root->root_item,  in btrfs_ioctl_subvol_setflags()
1818 			spin_unlock(&root->root_item_lock);  in btrfs_ioctl_subvol_setflags()
1820 			spin_unlock(&root->root_item_lock);  in btrfs_ioctl_subvol_setflags()
1821 			btrfs_warn(root->fs_info,  in btrfs_ioctl_subvol_setflags()
1823 					root->root_key.objectid);  in btrfs_ioctl_subvol_setflags()
1829 	trans = btrfs_start_transaction(root, 1);  in btrfs_ioctl_subvol_setflags()
1835 	ret = btrfs_update_root(trans, root->fs_info->tree_root,  in btrfs_ioctl_subvol_setflags()
1836 				&root->root_key, &root->root_item);  in btrfs_ioctl_subvol_setflags()
1838 	btrfs_commit_transaction(trans, root);  in btrfs_ioctl_subvol_setflags()
1841 		btrfs_set_root_flags(&root->root_item, root_flags);  in btrfs_ioctl_subvol_setflags()
1843 	up_write(&root->fs_info->subvol_sem);  in btrfs_ioctl_subvol_setflags()
1853 static noinline int may_destroy_subvol(struct btrfs_root *root)  in may_destroy_subvol()  argument
1866 	dir_id = btrfs_super_root_dir(root->fs_info->super_copy);  in may_destroy_subvol()
1867 	di = btrfs_lookup_dir_item(NULL, root->fs_info->tree_root, path,  in may_destroy_subvol()
1871 		if (key.objectid == root->root_key.objectid) {  in may_destroy_subvol()
1873 			btrfs_err(root->fs_info, "deleting default subvolume "  in may_destroy_subvol()
1880 	key.objectid = root->root_key.objectid;  in may_destroy_subvol()
1884 	ret = btrfs_search_slot(NULL, root->fs_info->tree_root,  in may_destroy_subvol()
1894 		if (key.objectid == root->root_key.objectid &&  in may_destroy_subvol()
1927 static noinline int copy_to_sk(struct btrfs_root *root,  in copy_to_sk()  argument
2051 	struct btrfs_root *root;  in search_ioctl()  local
2054 	struct btrfs_fs_info *info = BTRFS_I(inode)->root->fs_info;  in search_ioctl()
2070 		root = BTRFS_I(inode)->root;  in search_ioctl()
2075 		root = btrfs_read_fs_root_no_name(info, &key);  in search_ioctl()
2076 		if (IS_ERR(root)) {  in search_ioctl()
2089 		ret = btrfs_search_forward(root, &key, path, sk->min_transid);  in search_ioctl()
2095 		ret = copy_to_sk(root, path, &key, sk, buf_size, ubuf,  in search_ioctl()
2190 	struct btrfs_root *root;  in btrfs_search_path_in_tree()  local
2215 	root = btrfs_read_fs_root_no_name(info, &key);  in btrfs_search_path_in_tree()
2216 	if (IS_ERR(root)) {  in btrfs_search_path_in_tree()
2227 		ret = btrfs_search_slot(NULL, root, &key, path, 0, 0);  in btrfs_search_path_in_tree()
2231 			ret = btrfs_previous_item(root, path, dirid,  in btrfs_search_path_in_tree()
2290 		args->treeid = BTRFS_I(inode)->root->root_key.objectid;  in btrfs_ioctl_ino_lookup()
2292 	ret = btrfs_search_path_in_tree(BTRFS_I(inode)->root->fs_info,  in btrfs_ioctl_ino_lookup()
2310 	struct btrfs_root *root = BTRFS_I(dir)->root;  in btrfs_ioctl_snap_destroy()  local
2353 	dest = BTRFS_I(inode)->root;  in btrfs_ioctl_snap_destroy()
2369 		if (!btrfs_test_opt(root, USER_SUBVOL_RM_ALLOWED))  in btrfs_ioctl_snap_destroy()
2380 		if (root == dest)  in btrfs_ioctl_snap_destroy()
2413 		btrfs_warn(root->fs_info,  in btrfs_ioctl_snap_destroy()
2420 	down_write(&root->fs_info->subvol_sem);  in btrfs_ioctl_snap_destroy()
2431 	err = btrfs_subvolume_reserve_metadata(root, &block_rsv,  in btrfs_ioctl_snap_destroy()
2436 	trans = btrfs_start_transaction(root, 0);  in btrfs_ioctl_snap_destroy()
2444 	ret = btrfs_unlink_subvol(trans, root, dir,  in btrfs_ioctl_snap_destroy()
2450 		btrfs_abort_transaction(trans, root, ret);  in btrfs_ioctl_snap_destroy()
2463 					root->fs_info->tree_root,  in btrfs_ioctl_snap_destroy()
2466 			btrfs_abort_transaction(trans, root, ret);  in btrfs_ioctl_snap_destroy()
2472 	ret = btrfs_uuid_tree_rem(trans, root->fs_info->uuid_root,  in btrfs_ioctl_snap_destroy()
2476 		btrfs_abort_transaction(trans, root, ret);  in btrfs_ioctl_snap_destroy()
2481 		ret = btrfs_uuid_tree_rem(trans, root->fs_info->uuid_root,  in btrfs_ioctl_snap_destroy()
2486 			btrfs_abort_transaction(trans, root, ret);  in btrfs_ioctl_snap_destroy()
2495 	ret = btrfs_end_transaction(trans, root);  in btrfs_ioctl_snap_destroy()
2500 	btrfs_subvolume_release_metadata(root, &block_rsv, qgroup_reserved);  in btrfs_ioctl_snap_destroy()
2502 	up_write(&root->fs_info->subvol_sem);  in btrfs_ioctl_snap_destroy()
2538 	struct btrfs_root *root = BTRFS_I(inode)->root;  in btrfs_ioctl_defrag()  local
2546 	if (btrfs_root_readonly(root)) {  in btrfs_ioctl_defrag()
2557 		ret = btrfs_defrag_root(root);  in btrfs_ioctl_defrag()
2560 		ret = btrfs_defrag_root(root->fs_info->extent_root);  in btrfs_ioctl_defrag()
2604 static long btrfs_ioctl_add_dev(struct btrfs_root *root, void __user *arg)  in btrfs_ioctl_add_dev()  argument
2612 	if (atomic_xchg(&root->fs_info->mutually_exclusive_operation_running,  in btrfs_ioctl_add_dev()
2617 	mutex_lock(&root->fs_info->volume_mutex);  in btrfs_ioctl_add_dev()
2625 	ret = btrfs_init_new_device(root, vol_args->name);  in btrfs_ioctl_add_dev()
2628 		btrfs_info(root->fs_info, "disk added %s",vol_args->name);  in btrfs_ioctl_add_dev()
2632 	mutex_unlock(&root->fs_info->volume_mutex);  in btrfs_ioctl_add_dev()
2633 	atomic_set(&root->fs_info->mutually_exclusive_operation_running, 0);  in btrfs_ioctl_add_dev()
2639 	struct btrfs_root *root = BTRFS_I(file_inode(file))->root;  in btrfs_ioctl_rm_dev()  local
2658 	if (atomic_xchg(&root->fs_info->mutually_exclusive_operation_running,  in btrfs_ioctl_rm_dev()
2664 	mutex_lock(&root->fs_info->volume_mutex);  in btrfs_ioctl_rm_dev()
2665 	ret = btrfs_rm_device(root, vol_args->name);  in btrfs_ioctl_rm_dev()
2666 	mutex_unlock(&root->fs_info->volume_mutex);  in btrfs_ioctl_rm_dev()
2667 	atomic_set(&root->fs_info->mutually_exclusive_operation_running, 0);  in btrfs_ioctl_rm_dev()
2670 		btrfs_info(root->fs_info, "disk deleted %s",vol_args->name);  in btrfs_ioctl_rm_dev()
2679 static long btrfs_ioctl_fs_info(struct btrfs_root *root, void __user *arg)  in btrfs_ioctl_fs_info()  argument
2684 	struct btrfs_fs_devices *fs_devices = root->fs_info->fs_devices;  in btrfs_ioctl_fs_info()
2693 	memcpy(&fi_args->fsid, root->fs_info->fsid, sizeof(fi_args->fsid));  in btrfs_ioctl_fs_info()
2701 	fi_args->nodesize = root->fs_info->super_copy->nodesize;  in btrfs_ioctl_fs_info()
2702 	fi_args->sectorsize = root->fs_info->super_copy->sectorsize;  in btrfs_ioctl_fs_info()
2703 	fi_args->clone_alignment = root->fs_info->super_copy->sectorsize;  in btrfs_ioctl_fs_info()
2712 static long btrfs_ioctl_dev_info(struct btrfs_root *root, void __user *arg)  in btrfs_ioctl_dev_info()  argument
2716 	struct btrfs_fs_devices *fs_devices = root->fs_info->fs_devices;  in btrfs_ioctl_dev_info()
2728 	dev = btrfs_find_device(root->fs_info, di_args->devid, s_uuid, NULL);  in btrfs_ioctl_dev_info()
2886 	u64 bs = BTRFS_I(inode)->root->fs_info->sb->s_blocksize;  in extent_same_check_offsets()
2953 	u64 bs = BTRFS_I(src)->root->fs_info->sb->s_blocksize;  in btrfs_ioctl_file_extent_same()
3054 static int check_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,  in check_ref()  argument
3063 	if (!root->fs_info->quota_enabled)  in check_ref()
3066 	btrfs_get_tree_mod_seq(root->fs_info, &tree_mod_seq_elem);  in check_ref()
3067 	ret = btrfs_find_all_roots(trans, root->fs_info, disko,  in check_ref()
3074 		if (root_node->val == root->objectid) {  in check_ref()
3081 	btrfs_put_tree_mod_seq(root->fs_info, &tree_mod_seq_elem);  in check_ref()
3091 	struct btrfs_root *root = BTRFS_I(inode)->root;  in clone_finish_inode_update()  local
3105 	ret = btrfs_update_inode(trans, root, inode);  in clone_finish_inode_update()
3107 		btrfs_abort_transaction(trans, root, ret);  in clone_finish_inode_update()
3108 		btrfs_end_transaction(trans, root);  in clone_finish_inode_update()
3111 	ret = btrfs_end_transaction(trans, root);  in clone_finish_inode_update()
3209 	struct btrfs_root *root = BTRFS_I(dst)->root;  in clone_copy_inline_extent()  local
3211 				      root->sectorsize);  in clone_copy_inline_extent()
3221 	ret = btrfs_search_slot(NULL, root, &key, path, 0, 0);  in clone_copy_inline_extent()
3226 			ret = btrfs_next_leaf(root, path);  in clone_copy_inline_extent()
3261 		ret = btrfs_next_item(root, path);  in clone_copy_inline_extent()
3295 	ret = btrfs_drop_extents(trans, root, dst, drop_start, aligned_end, 1);  in clone_copy_inline_extent()
3298 	ret = btrfs_insert_empty_item(trans, root, path, new_key, size);  in clone_copy_inline_extent()
3332 	struct btrfs_root *root = BTRFS_I(inode)->root;  in btrfs_clone()  local
3347 	buf = vmalloc(root->nodesize);  in btrfs_clone()
3371 		ret = btrfs_search_slot(NULL, BTRFS_I(src)->root, &key, path,  in btrfs_clone()
3391 			ret = btrfs_next_leaf(BTRFS_I(src)->root, path);  in btrfs_clone()
3479 			trans = btrfs_start_transaction(root, 3);  in btrfs_clone()
3502 				ret = btrfs_drop_extents(trans, root, inode,  in btrfs_clone()
3509 								root, ret);  in btrfs_clone()
3510 					btrfs_end_transaction(trans, root);  in btrfs_clone()
3514 				ret = btrfs_insert_empty_item(trans, root, path,  in btrfs_clone()
3517 					btrfs_abort_transaction(trans, root,  in btrfs_clone()
3519 					btrfs_end_transaction(trans, root);  in btrfs_clone()
3547 				if (disko && root != BTRFS_I(src)->root &&  in btrfs_clone()
3549 					no_quota = check_ref(trans, root,  in btrfs_clone()
3553 									root,  in btrfs_clone()
3556 								      root);  in btrfs_clone()
3564 					ret = btrfs_inc_extent_ref(trans, root,  in btrfs_clone()
3566 							root->root_key.objectid,  in btrfs_clone()
3572 									root,  in btrfs_clone()
3575 								      root);  in btrfs_clone()
3594 					btrfs_end_transaction(trans, root);  in btrfs_clone()
3609 									root,  in btrfs_clone()
3611 					btrfs_end_transaction(trans, root);  in btrfs_clone()
3630 					      root->sectorsize);  in btrfs_clone()
3655 		trans = btrfs_start_transaction(root, 2);  in btrfs_clone()
3660 		ret = btrfs_drop_extents(trans, root, inode,  in btrfs_clone()
3664 				btrfs_abort_transaction(trans, root, ret);  in btrfs_clone()
3665 			btrfs_end_transaction(trans, root);  in btrfs_clone()
3684 	struct btrfs_root *root = BTRFS_I(inode)->root;  in btrfs_ioctl_clone()  local
3689 	u64 bs = root->fs_info->sb->s_blocksize;  in btrfs_ioctl_clone()
3707 	if (btrfs_root_readonly(root))  in btrfs_ioctl_clone()
3864 	struct btrfs_root *root = BTRFS_I(inode)->root;  in btrfs_ioctl_trans_start()  local
3877 	if (btrfs_root_readonly(root))  in btrfs_ioctl_trans_start()
3884 	atomic_inc(&root->fs_info->open_ioctl_trans);  in btrfs_ioctl_trans_start()
3887 	trans = btrfs_start_ioctl_transaction(root);  in btrfs_ioctl_trans_start()
3895 	atomic_dec(&root->fs_info->open_ioctl_trans);  in btrfs_ioctl_trans_start()
3904 	struct btrfs_root *root = BTRFS_I(inode)->root;  in btrfs_ioctl_default_subvol()  local
3934 	new_root = btrfs_read_fs_root_no_name(root->fs_info, &location);  in btrfs_ioctl_default_subvol()
3947 	trans = btrfs_start_transaction(root, 1);  in btrfs_ioctl_default_subvol()
3954 	dir_id = btrfs_super_root_dir(root->fs_info->super_copy);  in btrfs_ioctl_default_subvol()
3955 	di = btrfs_lookup_dir_item(trans, root->fs_info->tree_root, path,  in btrfs_ioctl_default_subvol()
3959 		btrfs_end_transaction(trans, root);  in btrfs_ioctl_default_subvol()
3971 	btrfs_set_fs_incompat(root->fs_info, DEFAULT_SUBVOL);  in btrfs_ioctl_default_subvol()
3972 	btrfs_end_transaction(trans, root);  in btrfs_ioctl_default_subvol()
3994 static long btrfs_ioctl_space_info(struct btrfs_root *root, void __user *arg)  in btrfs_ioctl_space_info()  argument
4022 		list_for_each_entry_rcu(tmp, &root->fs_info->space_info,  in btrfs_ioctl_space_info()
4078 		list_for_each_entry_rcu(tmp, &root->fs_info->space_info,  in btrfs_ioctl_space_info()
4109 		struct btrfs_block_rsv *block_rsv = &root->fs_info->global_block_rsv;  in btrfs_ioctl_space_info()
4143 	struct btrfs_root *root = BTRFS_I(inode)->root;  in btrfs_ioctl_trans_end()  local
4151 	btrfs_end_transaction(trans, root);  in btrfs_ioctl_trans_end()
4153 	atomic_dec(&root->fs_info->open_ioctl_trans);  in btrfs_ioctl_trans_end()
4159 static noinline long btrfs_ioctl_start_sync(struct btrfs_root *root,  in btrfs_ioctl_start_sync()  argument
4166 	trans = btrfs_attach_transaction_barrier(root);  in btrfs_ioctl_start_sync()
4172 		transid = root->fs_info->last_trans_committed;  in btrfs_ioctl_start_sync()
4176 	ret = btrfs_commit_transaction_async(trans, root, 0);  in btrfs_ioctl_start_sync()
4178 		btrfs_end_transaction(trans, root);  in btrfs_ioctl_start_sync()
4188 static noinline long btrfs_ioctl_wait_sync(struct btrfs_root *root,  in btrfs_ioctl_wait_sync()  argument
4199 	return btrfs_wait_for_commit(root, transid);  in btrfs_ioctl_wait_sync()
4204 	struct btrfs_root *root = BTRFS_I(file_inode(file))->root;  in btrfs_ioctl_scrub()  local
4221 	ret = btrfs_scrub_dev(root->fs_info, sa->devid, sa->start, sa->end,  in btrfs_ioctl_scrub()
4235 static long btrfs_ioctl_scrub_cancel(struct btrfs_root *root, void __user *arg)  in btrfs_ioctl_scrub_cancel()  argument
4240 	return btrfs_scrub_cancel(root->fs_info);  in btrfs_ioctl_scrub_cancel()
4243 static long btrfs_ioctl_scrub_progress(struct btrfs_root *root,  in btrfs_ioctl_scrub_progress()  argument
4256 	ret = btrfs_scrub_progress(root, sa->devid, &sa->progress);  in btrfs_ioctl_scrub_progress()
4265 static long btrfs_ioctl_get_dev_stats(struct btrfs_root *root,  in btrfs_ioctl_get_dev_stats()  argument
4280 	ret = btrfs_get_dev_stats(root, sa);  in btrfs_ioctl_get_dev_stats()
4289 static long btrfs_ioctl_dev_replace(struct btrfs_root *root, void __user *arg)  in btrfs_ioctl_dev_replace()  argument
4303 		if (root->fs_info->sb->s_flags & MS_RDONLY) {  in btrfs_ioctl_dev_replace()
4308 			&root->fs_info->mutually_exclusive_operation_running,  in btrfs_ioctl_dev_replace()
4312 			ret = btrfs_dev_replace_start(root, p);  in btrfs_ioctl_dev_replace()
4314 			 &root->fs_info->mutually_exclusive_operation_running,  in btrfs_ioctl_dev_replace()
4319 		btrfs_dev_replace_status(root->fs_info, p);  in btrfs_ioctl_dev_replace()
4323 		ret = btrfs_dev_replace_cancel(root->fs_info, p);  in btrfs_ioctl_dev_replace()
4337 static long btrfs_ioctl_ino_to_path(struct btrfs_root *root, void __user *arg)  in btrfs_ioctl_ino_to_path()  argument
4364 	ipath = init_ipath(size, root, path);  in btrfs_ioctl_ino_to_path()
4396 static int build_ino_list(u64 inum, u64 offset, u64 root, void *ctx)  in build_ino_list()  argument
4405 		inodes->val[inodes->elem_cnt + 2] = root;  in build_ino_list()
4416 static long btrfs_ioctl_logical_to_ino(struct btrfs_root *root,  in btrfs_ioctl_logical_to_ino()  argument
4449 	ret = iterate_inodes_from_logical(loi->logical, root->fs_info, path,  in btrfs_ioctl_logical_to_ino()
4498 	struct btrfs_root *root = BTRFS_I(file_inode(file))->root;  in btrfs_ioctl_balance()  local
4499 	struct btrfs_fs_info *fs_info = root->fs_info;  in btrfs_ioctl_balance()
4645 static long btrfs_ioctl_balance_ctl(struct btrfs_root *root, int cmd)  in btrfs_ioctl_balance_ctl()  argument
4652 		return btrfs_pause_balance(root->fs_info);  in btrfs_ioctl_balance_ctl()
4654 		return btrfs_cancel_balance(root->fs_info);  in btrfs_ioctl_balance_ctl()
4660 static long btrfs_ioctl_balance_progress(struct btrfs_root *root,  in btrfs_ioctl_balance_progress()  argument
4663 	struct btrfs_fs_info *fs_info = root->fs_info;  in btrfs_ioctl_balance_progress()
4695 	struct btrfs_root *root = BTRFS_I(file_inode(file))->root;  in btrfs_ioctl_quota_ctl()  local
4714 	down_write(&root->fs_info->subvol_sem);  in btrfs_ioctl_quota_ctl()
4715 	trans = btrfs_start_transaction(root->fs_info->tree_root, 2);  in btrfs_ioctl_quota_ctl()
4723 		ret = btrfs_quota_enable(trans, root->fs_info);  in btrfs_ioctl_quota_ctl()
4726 		ret = btrfs_quota_disable(trans, root->fs_info);  in btrfs_ioctl_quota_ctl()
4733 	err = btrfs_commit_transaction(trans, root->fs_info->tree_root);  in btrfs_ioctl_quota_ctl()
4738 	up_write(&root->fs_info->subvol_sem);  in btrfs_ioctl_quota_ctl()
4746 	struct btrfs_root *root = BTRFS_I(file_inode(file))->root;  in btrfs_ioctl_qgroup_assign()  local
4765 	trans = btrfs_join_transaction(root);  in btrfs_ioctl_qgroup_assign()
4773 		ret = btrfs_add_qgroup_relation(trans, root->fs_info,  in btrfs_ioctl_qgroup_assign()
4776 		ret = btrfs_del_qgroup_relation(trans, root->fs_info,  in btrfs_ioctl_qgroup_assign()
4781 	err = btrfs_run_qgroups(trans, root->fs_info);  in btrfs_ioctl_qgroup_assign()
4783 		btrfs_error(root->fs_info, ret,  in btrfs_ioctl_qgroup_assign()
4785 	err = btrfs_end_transaction(trans, root);  in btrfs_ioctl_qgroup_assign()
4798 	struct btrfs_root *root = BTRFS_I(file_inode(file))->root;  in btrfs_ioctl_qgroup_create()  local
4822 	trans = btrfs_join_transaction(root);  in btrfs_ioctl_qgroup_create()
4830 		ret = btrfs_create_qgroup(trans, root->fs_info, sa->qgroupid);  in btrfs_ioctl_qgroup_create()
4832 		ret = btrfs_remove_qgroup(trans, root->fs_info, sa->qgroupid);  in btrfs_ioctl_qgroup_create()
4835 	err = btrfs_end_transaction(trans, root);  in btrfs_ioctl_qgroup_create()
4848 	struct btrfs_root *root = BTRFS_I(file_inode(file))->root;  in btrfs_ioctl_qgroup_limit()  local
4868 	trans = btrfs_join_transaction(root);  in btrfs_ioctl_qgroup_limit()
4877 		qgroupid = root->root_key.objectid;  in btrfs_ioctl_qgroup_limit()
4881 	ret = btrfs_limit_qgroup(trans, root->fs_info, qgroupid, &sa->lim);  in btrfs_ioctl_qgroup_limit()
4883 	err = btrfs_end_transaction(trans, root);  in btrfs_ioctl_qgroup_limit()
4896 	struct btrfs_root *root = BTRFS_I(file_inode(file))->root;  in btrfs_ioctl_quota_rescan()  local
4918 	ret = btrfs_qgroup_rescan(root->fs_info);  in btrfs_ioctl_quota_rescan()
4929 	struct btrfs_root *root = BTRFS_I(file_inode(file))->root;  in btrfs_ioctl_quota_rescan_status()  local
4940 	if (root->fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_RESCAN) {  in btrfs_ioctl_quota_rescan_status()
4942 		qsa->progress = root->fs_info->qgroup_rescan_progress.objectid;  in btrfs_ioctl_quota_rescan_status()
4954 	struct btrfs_root *root = BTRFS_I(file_inode(file))->root;  in btrfs_ioctl_quota_rescan_wait()  local
4959 	return btrfs_qgroup_wait_for_completion(root->fs_info);  in btrfs_ioctl_quota_rescan_wait()
4966 	struct btrfs_root *root = BTRFS_I(inode)->root;  in _btrfs_ioctl_set_received_subvol()  local
4967 	struct btrfs_root_item *root_item = &root->root_item;  in _btrfs_ioctl_set_received_subvol()
4980 	down_write(&root->fs_info->subvol_sem);  in _btrfs_ioctl_set_received_subvol()
4987 	if (btrfs_root_readonly(root)) {  in _btrfs_ioctl_set_received_subvol()
4996 	trans = btrfs_start_transaction(root, 3);  in _btrfs_ioctl_set_received_subvol()
5011 		btrfs_uuid_tree_rem(trans, root->fs_info->uuid_root,  in _btrfs_ioctl_set_received_subvol()
5014 				    root->root_key.objectid);  in _btrfs_ioctl_set_received_subvol()
5023 	ret = btrfs_update_root(trans, root->fs_info->tree_root,  in _btrfs_ioctl_set_received_subvol()
5024 				&root->root_key, &root->root_item);  in _btrfs_ioctl_set_received_subvol()
5026 		btrfs_end_transaction(trans, root);  in _btrfs_ioctl_set_received_subvol()
5030 		ret = btrfs_uuid_tree_add(trans, root->fs_info->uuid_root,  in _btrfs_ioctl_set_received_subvol()
5033 					  root->root_key.objectid);  in _btrfs_ioctl_set_received_subvol()
5035 			btrfs_abort_transaction(trans, root, ret);  in _btrfs_ioctl_set_received_subvol()
5039 	ret = btrfs_commit_transaction(trans, root);  in _btrfs_ioctl_set_received_subvol()
5041 		btrfs_abort_transaction(trans, root, ret);  in _btrfs_ioctl_set_received_subvol()
5046 	up_write(&root->fs_info->subvol_sem);  in _btrfs_ioctl_set_received_subvol()
5134 	struct btrfs_root *root = BTRFS_I(file_inode(file))->root;  in btrfs_ioctl_get_fslabel()  local
5139 	spin_lock(&root->fs_info->super_lock);  in btrfs_ioctl_get_fslabel()
5140 	memcpy(label, root->fs_info->super_copy->label, BTRFS_LABEL_SIZE);  in btrfs_ioctl_get_fslabel()
5141 	spin_unlock(&root->fs_info->super_lock);  in btrfs_ioctl_get_fslabel()
5146 		btrfs_warn(root->fs_info,  in btrfs_ioctl_get_fslabel()
5157 	struct btrfs_root *root = BTRFS_I(file_inode(file))->root;  in btrfs_ioctl_set_fslabel()  local
5158 	struct btrfs_super_block *super_block = root->fs_info->super_copy;  in btrfs_ioctl_set_fslabel()
5170 		btrfs_err(root->fs_info, "unable to set label with more than %d bytes",  in btrfs_ioctl_set_fslabel()
5179 	trans = btrfs_start_transaction(root, 0);  in btrfs_ioctl_set_fslabel()
5185 	spin_lock(&root->fs_info->super_lock);  in btrfs_ioctl_set_fslabel()
5187 	spin_unlock(&root->fs_info->super_lock);  in btrfs_ioctl_set_fslabel()
5188 	ret = btrfs_commit_transaction(trans, root);  in btrfs_ioctl_set_fslabel()
5217 	struct btrfs_root *root = BTRFS_I(file_inode(file))->root;  in btrfs_ioctl_get_features()  local
5218 	struct btrfs_super_block *super_block = root->fs_info->super_copy;  in btrfs_ioctl_get_features()
5231 static int check_feature_bits(struct btrfs_root *root,  in check_feature_bits()  argument
5246 			btrfs_warn(root->fs_info,  in check_feature_bits()
5251 			btrfs_warn(root->fs_info,  in check_feature_bits()
5261 			btrfs_warn(root->fs_info,  in check_feature_bits()
5266 			btrfs_warn(root->fs_info,  in check_feature_bits()
5276 			btrfs_warn(root->fs_info,  in check_feature_bits()
5281 			btrfs_warn(root->fs_info,  in check_feature_bits()
5290 #define check_feature(root, change_mask, flags, mask_base)	\  argument
5291 check_feature_bits(root, FEAT_##mask_base, change_mask, flags,	\
5298 	struct btrfs_root *root = BTRFS_I(file_inode(file))->root;  in btrfs_ioctl_set_features()  local
5299 	struct btrfs_super_block *super_block = root->fs_info->super_copy;  in btrfs_ioctl_set_features()
5316 	ret = check_feature(root, flags[0].compat_flags,  in btrfs_ioctl_set_features()
5321 	ret = check_feature(root, flags[0].compat_ro_flags,  in btrfs_ioctl_set_features()
5326 	ret = check_feature(root, flags[0].incompat_flags,  in btrfs_ioctl_set_features()
5331 	trans = btrfs_start_transaction(root, 0);  in btrfs_ioctl_set_features()
5335 	spin_lock(&root->fs_info->super_lock);  in btrfs_ioctl_set_features()
5350 	spin_unlock(&root->fs_info->super_lock);  in btrfs_ioctl_set_features()
5352 	return btrfs_commit_transaction(trans, root);  in btrfs_ioctl_set_features()
5358 	struct btrfs_root *root = BTRFS_I(file_inode(file))->root;  in btrfs_ioctl()  local
5393 		return btrfs_ioctl_add_dev(root, argp);  in btrfs_ioctl()
5397 		return btrfs_ioctl_fs_info(root, argp);  in btrfs_ioctl()
5399 		return btrfs_ioctl_dev_info(root, argp);  in btrfs_ioctl()
5417 		return btrfs_ioctl_ino_to_path(root, argp);  in btrfs_ioctl()
5419 		return btrfs_ioctl_logical_to_ino(root, argp);  in btrfs_ioctl()
5421 		return btrfs_ioctl_space_info(root, argp);  in btrfs_ioctl()
5425 		ret = btrfs_start_delalloc_roots(root->fs_info, 0, -1);  in btrfs_ioctl()
5434 		wake_up_process(root->fs_info->transaction_kthread);  in btrfs_ioctl()
5438 		return btrfs_ioctl_start_sync(root, argp);  in btrfs_ioctl()
5440 		return btrfs_ioctl_wait_sync(root, argp);  in btrfs_ioctl()
5444 		return btrfs_ioctl_scrub_cancel(root, argp);  in btrfs_ioctl()
5446 		return btrfs_ioctl_scrub_progress(root, argp);  in btrfs_ioctl()
5450 		return btrfs_ioctl_balance_ctl(root, arg);  in btrfs_ioctl()
5452 		return btrfs_ioctl_balance_progress(root, argp);  in btrfs_ioctl()
5462 		return btrfs_ioctl_get_dev_stats(root, argp);  in btrfs_ioctl()
5478 		return btrfs_ioctl_dev_replace(root, argp);  in btrfs_ioctl()