125 		struct fuse_conn *fc = get_fuse_conn(inode);  in fuse_evict_inode()  local
130 			fuse_queue_forget(fc, fi->forget, fi->nodeid,  in fuse_evict_inode()
141 static int fuse_reconfigure(struct fs_context *fc)  in fuse_reconfigure()  argument
143 	struct super_block *sb = fc->root->d_sb;  in fuse_reconfigure()
146 	if (fc->sb_flags & SB_MANDLOCK)  in fuse_reconfigure()
167 	struct fuse_conn *fc = get_fuse_conn(inode);  in fuse_change_attributes_common()  local
172 	fi->attr_version = atomic64_inc_return(&fc->attr_version);  in fuse_change_attributes_common()
179 	inode->i_uid     = make_kuid(fc->user_ns, attr->uid);  in fuse_change_attributes_common()
180 	inode->i_gid     = make_kgid(fc->user_ns, attr->gid);  in fuse_change_attributes_common()
185 	if (!fc->writeback_cache || !S_ISREG(inode->i_mode)) {  in fuse_change_attributes_common()
203 	if (!fc->default_permissions)  in fuse_change_attributes_common()
212 	struct fuse_conn *fc = get_fuse_conn(inode);  in fuse_change_attributes()  local
214 	bool is_wb = fc->writeback_cache;  in fuse_change_attributes()
243 			if (!fc->explicit_inval_data)  in fuse_change_attributes()
245 		} else if (fc->auto_inval_data) {  in fuse_change_attributes()
310 	struct fuse_conn *fc = get_fuse_conn_super(sb);  in fuse_iget()  local
319 	if (fc->auto_submounts && (attr->flags & FUSE_ATTR_SUBMOUNT) &&  in fuse_iget()
338 		if (!fc->writeback_cache || !S_ISREG(attr->mode))  in fuse_iget()
359 struct inode *fuse_ilookup(struct fuse_conn *fc, u64 nodeid,  in fuse_ilookup()  argument
365 	WARN_ON(!rwsem_is_locked(&fc->killsb));  in fuse_ilookup()
366 	list_for_each_entry(fm_iter, &fc->mounts, fc_entry) {  in fuse_ilookup()
381 int fuse_reverse_inval_inode(struct fuse_conn *fc, u64 nodeid,  in fuse_reverse_inval_inode()  argument
389 	inode = fuse_ilookup(fc, nodeid, NULL);  in fuse_reverse_inval_inode()
395 	fi->attr_version = atomic64_inc_return(&fc->attr_version);  in fuse_reverse_inval_inode()
433 	struct fuse_conn *fc = get_fuse_conn_super(sb);  in fuse_umount_begin()  local
435 	if (!fc->no_force_umount)  in fuse_umount_begin()
436 		fuse_abort_conn(fc);  in fuse_umount_begin()
441 	if (fm->fc->conn_init) {  in fuse_send_destroy()
480 	if (!fuse_allow_current_process(fm->fc)) {  in fuse_statfs()
526 static int fuse_parse_param(struct fs_context *fc, struct fs_parameter *param)  in fuse_parse_param()  argument
529 	struct fuse_fs_context *ctx = fc->fs_private;  in fuse_parse_param()
532 	if (fc->purpose == FS_CONTEXT_FOR_RECONFIGURE) {  in fuse_parse_param()
537 		if (fc->oldapi)  in fuse_parse_param()
540 		return invalfc(fc, "No changes allowed in reconfigure");  in fuse_parse_param()
543 	opt = fs_parse(fc, fuse_fs_parameters, param, &result);  in fuse_parse_param()
549 		if (fc->source)  in fuse_parse_param()
550 			return invalfc(fc, "Multiple sources specified");  in fuse_parse_param()
551 		fc->source = param->string;  in fuse_parse_param()
557 			return invalfc(fc, "Multiple subtypes specified");  in fuse_parse_param()
569 			return invalfc(fc, "Invalid rootmode");  in fuse_parse_param()
575 		ctx->user_id = make_kuid(fc->user_ns, result.uint_32);  in fuse_parse_param()
577 			return invalfc(fc, "Invalid user_id");  in fuse_parse_param()
582 		ctx->group_id = make_kgid(fc->user_ns, result.uint_32);  in fuse_parse_param()
584 			return invalfc(fc, "Invalid group_id");  in fuse_parse_param()
602 			return invalfc(fc, "blksize only supported for fuseblk");  in fuse_parse_param()
613 static void fuse_free_fc(struct fs_context *fc)  in fuse_free_fc()  argument
615 	struct fuse_fs_context *ctx = fc->fs_private;  in fuse_free_fc()
626 	struct fuse_conn *fc = get_fuse_conn_super(sb);  in fuse_show_options()  local
628 	if (fc->legacy_opts_show) {  in fuse_show_options()
630 			   from_kuid_munged(fc->user_ns, fc->user_id));  in fuse_show_options()
632 			   from_kgid_munged(fc->user_ns, fc->group_id));  in fuse_show_options()
633 		if (fc->default_permissions)  in fuse_show_options()
635 		if (fc->allow_other)  in fuse_show_options()
637 		if (fc->max_read != ~0)  in fuse_show_options()
638 			seq_printf(m, ",max_read=%u", fc->max_read);  in fuse_show_options()
643 	if (fc->dax)  in fuse_show_options()
676 void fuse_conn_init(struct fuse_conn *fc, struct fuse_mount *fm,  in fuse_conn_init()  argument
680 	memset(fc, 0, sizeof(*fc));  in fuse_conn_init()
681 	spin_lock_init(&fc->lock);  in fuse_conn_init()
682 	spin_lock_init(&fc->bg_lock);  in fuse_conn_init()
683 	init_rwsem(&fc->killsb);  in fuse_conn_init()
684 	refcount_set(&fc->count, 1);  in fuse_conn_init()
685 	atomic_set(&fc->dev_count, 1);  in fuse_conn_init()
686 	init_waitqueue_head(&fc->blocked_waitq);  in fuse_conn_init()
687 	fuse_iqueue_init(&fc->iq, fiq_ops, fiq_priv);  in fuse_conn_init()
688 	INIT_LIST_HEAD(&fc->bg_queue);  in fuse_conn_init()
689 	INIT_LIST_HEAD(&fc->entry);  in fuse_conn_init()
690 	INIT_LIST_HEAD(&fc->devices);  in fuse_conn_init()
691 	atomic_set(&fc->num_waiting, 0);  in fuse_conn_init()
692 	fc->max_background = FUSE_DEFAULT_MAX_BACKGROUND;  in fuse_conn_init()
693 	fc->congestion_threshold = FUSE_DEFAULT_CONGESTION_THRESHOLD;  in fuse_conn_init()
694 	atomic64_set(&fc->khctr, 0);  in fuse_conn_init()
695 	fc->polled_files = RB_ROOT;  in fuse_conn_init()
696 	fc->blocked = 0;  in fuse_conn_init()
697 	fc->initialized = 0;  in fuse_conn_init()
698 	fc->connected = 1;  in fuse_conn_init()
699 	atomic64_set(&fc->attr_version, 1);  in fuse_conn_init()
700 	get_random_bytes(&fc->scramble_key, sizeof(fc->scramble_key));  in fuse_conn_init()
701 	fc->pid_ns = get_pid_ns(task_active_pid_ns(current));  in fuse_conn_init()
702 	fc->user_ns = get_user_ns(user_ns);  in fuse_conn_init()
703 	fc->max_pages = FUSE_DEFAULT_MAX_PAGES_PER_REQ;  in fuse_conn_init()
705 	INIT_LIST_HEAD(&fc->mounts);  in fuse_conn_init()
706 	list_add(&fm->fc_entry, &fc->mounts);  in fuse_conn_init()
707 	fm->fc = fc;  in fuse_conn_init()
712 void fuse_conn_put(struct fuse_conn *fc)  in fuse_conn_put()  argument
714 	if (refcount_dec_and_test(&fc->count)) {  in fuse_conn_put()
715 		struct fuse_iqueue *fiq = &fc->iq;  in fuse_conn_put()
718 			fuse_dax_conn_free(fc);  in fuse_conn_put()
721 		put_pid_ns(fc->pid_ns);  in fuse_conn_put()
722 		put_user_ns(fc->user_ns);  in fuse_conn_put()
723 		fc->release(fc);  in fuse_conn_put()
728 struct fuse_conn *fuse_conn_get(struct fuse_conn *fc)  in fuse_conn_get()  argument
730 	refcount_inc(&fc->count);  in fuse_conn_get()
731 	return fc;  in fuse_conn_get()
738 		if (fm->fc)  in fuse_mount_put()
739 			fuse_conn_put(fm->fc);  in fuse_mount_put()
771 	struct fuse_conn *fc = get_fuse_conn_super(sb);  in fuse_get_dentry()  local
784 		if (!fc->export_support)  in fuse_get_dentry()
878 	struct fuse_conn *fc = get_fuse_conn(child_inode);  in fuse_get_parent()  local
885 	if (!fc->export_support)  in fuse_get_parent()
948 static void process_init_limits(struct fuse_conn *fc, struct fuse_init_out *arg)  in process_init_limits()  argument
958 	spin_lock(&fc->bg_lock);  in process_init_limits()
960 		fc->max_background = arg->max_background;  in process_init_limits()
962 		if (!cap_sys_admin && fc->max_background > max_user_bgreq)  in process_init_limits()
963 			fc->max_background = max_user_bgreq;  in process_init_limits()
966 		fc->congestion_threshold = arg->congestion_threshold;  in process_init_limits()
969 		    fc->congestion_threshold > max_user_congthresh)  in process_init_limits()
970 			fc->congestion_threshold = max_user_congthresh;  in process_init_limits()
972 	spin_unlock(&fc->bg_lock);  in process_init_limits()
984 	struct fuse_conn *fc = fm->fc;  in process_init_reply()  local
994 		process_init_limits(fc, arg);  in process_init_reply()
999 				fc->async_read = 1;  in process_init_reply()
1001 				fc->no_lock = 1;  in process_init_reply()
1004 					fc->no_flock = 1;  in process_init_reply()
1007 					fc->no_flock = 1;  in process_init_reply()
1010 				fc->atomic_o_trunc = 1;  in process_init_reply()
1014 					fc->export_support = 1;  in process_init_reply()
1017 				fc->big_writes = 1;  in process_init_reply()
1019 				fc->dont_mask = 1;  in process_init_reply()
1021 				fc->auto_inval_data = 1;  in process_init_reply()
1023 				fc->explicit_inval_data = 1;  in process_init_reply()
1025 				fc->do_readdirplus = 1;  in process_init_reply()
1027 					fc->readdirplus_auto = 1;  in process_init_reply()
1030 				fc->async_dio = 1;  in process_init_reply()
1032 				fc->writeback_cache = 1;  in process_init_reply()
1034 				fc->parallel_dirops = 1;  in process_init_reply()
1036 				fc->handle_killpriv = 1;  in process_init_reply()
1040 				fc->default_permissions = 1;  in process_init_reply()
1041 				fc->posix_acl = 1;  in process_init_reply()
1045 				fc->cache_symlinks = 1;  in process_init_reply()
1047 				fc->abort_err = 1;  in process_init_reply()
1049 				fc->max_pages =  in process_init_reply()
1055 			    !fuse_dax_check_alignment(fc, arg->map_alignment)) {  in process_init_reply()
1059 			ra_pages = fc->max_read / PAGE_SIZE;  in process_init_reply()
1060 			fc->no_lock = 1;  in process_init_reply()
1061 			fc->no_flock = 1;  in process_init_reply()
1066 		fc->minor = arg->minor;  in process_init_reply()
1067 		fc->max_write = arg->minor < 5 ? 4096 : arg->max_write;  in process_init_reply()
1068 		fc->max_write = max_t(unsigned, 4096, fc->max_write);  in process_init_reply()
1069 		fc->conn_init = 1;  in process_init_reply()
1074 		fc->conn_init = 0;  in process_init_reply()
1075 		fc->conn_error = 1;  in process_init_reply()
1078 	fuse_set_initialized(fc);  in process_init_reply()
1079 	wake_up_all(&fc->blocked_waitq);  in process_init_reply()
1102 	if (fm->fc->dax)  in fuse_send_init()
1105 	if (fm->fc->auto_submounts)  in fuse_send_init()
1128 void fuse_free_conn(struct fuse_conn *fc)  in fuse_free_conn()  argument
1130 	WARN_ON(!list_empty(&fc->devices));  in fuse_free_conn()
1131 	kfree_rcu(fc, rcu);  in fuse_free_conn()
1135 static int fuse_bdi_init(struct fuse_conn *fc, struct super_block *sb)  in fuse_bdi_init()  argument
1149 	err = super_setup_bdi_name(sb, "%u:%u%s", MAJOR(fc->dev),  in fuse_bdi_init()
1150 				   MINOR(fc->dev), suffix);  in fuse_bdi_init()
1197 void fuse_dev_install(struct fuse_dev *fud, struct fuse_conn *fc)  in fuse_dev_install()  argument
1199 	fud->fc = fuse_conn_get(fc);  in fuse_dev_install()
1200 	spin_lock(&fc->lock);  in fuse_dev_install()
1201 	list_add_tail(&fud->entry, &fc->devices);  in fuse_dev_install()
1202 	spin_unlock(&fc->lock);  in fuse_dev_install()
1206 struct fuse_dev *fuse_dev_alloc_install(struct fuse_conn *fc)  in fuse_dev_alloc_install()  argument
1214 	fuse_dev_install(fud, fc);  in fuse_dev_alloc_install()
1221 	struct fuse_conn *fc = fud->fc;  in fuse_dev_free()  local
1223 	if (fc) {  in fuse_dev_free()
1224 		spin_lock(&fc->lock);  in fuse_dev_free()
1226 		spin_unlock(&fc->lock);  in fuse_dev_free()
1228 		fuse_conn_put(fc);  in fuse_dev_free()
1320 	struct fuse_conn *fc = fm->fc;  in fuse_fill_super_common()  local
1345 		err = fuse_dax_conn_alloc(fc, ctx->dax_dev);  in fuse_fill_super_common()
1352 		fud = fuse_dev_alloc_install(fc);  in fuse_fill_super_common()
1357 	fc->dev = sb->s_dev;  in fuse_fill_super_common()
1359 	err = fuse_bdi_init(fc, sb);  in fuse_fill_super_common()
1365 		fc->dont_mask = 1;  in fuse_fill_super_common()
1368 	fc->default_permissions = ctx->default_permissions;  in fuse_fill_super_common()
1369 	fc->allow_other = ctx->allow_other;  in fuse_fill_super_common()
1370 	fc->user_id = ctx->user_id;  in fuse_fill_super_common()
1371 	fc->group_id = ctx->group_id;  in fuse_fill_super_common()
1372 	fc->legacy_opts_show = ctx->legacy_opts_show;  in fuse_fill_super_common()
1373 	fc->max_read = max_t(unsigned int, 4096, ctx->max_read);  in fuse_fill_super_common()
1374 	fc->destroy = ctx->destroy;  in fuse_fill_super_common()
1375 	fc->no_control = ctx->no_control;  in fuse_fill_super_common()
1376 	fc->no_force_umount = ctx->no_force_umount;  in fuse_fill_super_common()
1392 	err = fuse_ctl_add_conn(fc);  in fuse_fill_super_common()
1396 	list_add_tail(&fc->entry, &fuse_conn_list);  in fuse_fill_super_common()
1411 		fuse_dax_conn_free(fc);  in fuse_fill_super_common()
1422 	struct fuse_conn *fc;  in fuse_fill_super()  local
1439 	fc = kmalloc(sizeof(*fc), GFP_KERNEL);  in fuse_fill_super()
1441 	if (!fc)  in fuse_fill_super()
1446 		kfree(fc);  in fuse_fill_super()
1450 	fuse_conn_init(fc, fm, sb->s_user_ns, &fuse_dev_fiq_ops, NULL);  in fuse_fill_super()
1451 	fc->release = fuse_free_conn;  in fuse_fill_super()
1476 static int fuse_get_tree(struct fs_context *fc)  in fuse_get_tree()  argument
1478 	struct fuse_fs_context *ctx = fc->fs_private;  in fuse_get_tree()
1486 		return get_tree_bdev(fc, fuse_fill_super);  in fuse_get_tree()
1489 	return get_tree_nodev(fc, fuse_fill_super);  in fuse_get_tree()
1502 static int fuse_init_fs_context(struct fs_context *fc)  in fuse_init_fs_context()  argument
1515 	if (fc->fs_type == &fuseblk_fs_type) {  in fuse_init_fs_context()
1521 	fc->fs_private = ctx;  in fuse_init_fs_context()
1522 	fc->ops = &fuse_context_ops;  in fuse_init_fs_context()
1528 	struct fuse_conn *fc = fm->fc;  in fuse_mount_remove()  local
1531 	down_write(&fc->killsb);  in fuse_mount_remove()
1533 	if (list_empty(&fc->mounts))  in fuse_mount_remove()
1535 	up_write(&fc->killsb);  in fuse_mount_remove()
1543 	struct fuse_conn *fc = fm->fc;  in fuse_conn_destroy()  local
1545 	if (fc->destroy)  in fuse_conn_destroy()
1548 	fuse_abort_conn(fc);  in fuse_conn_destroy()
1549 	fuse_wait_aborted(fc);  in fuse_conn_destroy()
1551 	if (!list_empty(&fc->entry)) {  in fuse_conn_destroy()
1553 		list_del(&fc->entry);  in fuse_conn_destroy()
1554 		fuse_ctl_remove_conn(fc);  in fuse_conn_destroy()