124 		struct fuse_conn *fc = get_fuse_conn(inode);  in fuse_evict_inode()  local
129 			fuse_queue_forget(fc, fi->forget, fi->nodeid,  in fuse_evict_inode()
166 	struct fuse_conn *fc = get_fuse_conn(inode);  in fuse_change_attributes_common()  local
171 	fi->attr_version = atomic64_inc_return(&fc->attr_version);  in fuse_change_attributes_common()
178 	inode->i_uid     = make_kuid(fc->user_ns, attr->uid);  in fuse_change_attributes_common()
179 	inode->i_gid     = make_kgid(fc->user_ns, attr->gid);  in fuse_change_attributes_common()
184 	if (!fc->writeback_cache || !S_ISREG(inode->i_mode)) {  in fuse_change_attributes_common()
202 	if (!fc->default_permissions)  in fuse_change_attributes_common()
221 	struct fuse_conn *fc = get_fuse_conn(inode);  in fuse_change_attributes()  local
223 	bool is_wb = fc->writeback_cache;  in fuse_change_attributes()
252 			if (!fc->explicit_inval_data)  in fuse_change_attributes()
254 		} else if (fc->auto_inval_data) {  in fuse_change_attributes()
319 	struct fuse_conn *fc = get_fuse_conn_super(sb);  in fuse_iget()  local
328 	if (fc->auto_submounts && (attr->flags & FUSE_ATTR_SUBMOUNT) &&  in fuse_iget()
347 		if (!fc->writeback_cache || !S_ISREG(attr->mode))  in fuse_iget()
368 struct inode *fuse_ilookup(struct fuse_conn *fc, u64 nodeid,  in fuse_ilookup()  argument
374 	WARN_ON(!rwsem_is_locked(&fc->killsb));  in fuse_ilookup()
375 	list_for_each_entry(fm_iter, &fc->mounts, fc_entry) {  in fuse_ilookup()
390 int fuse_reverse_inval_inode(struct fuse_conn *fc, u64 nodeid,  in fuse_reverse_inval_inode()  argument
398 	inode = fuse_ilookup(fc, nodeid, NULL);  in fuse_reverse_inval_inode()
404 	fi->attr_version = atomic64_inc_return(&fc->attr_version);  in fuse_reverse_inval_inode()
442 	struct fuse_conn *fc = get_fuse_conn_super(sb);  in fuse_umount_begin()  local
444 	if (!fc->no_force_umount)  in fuse_umount_begin()
445 		fuse_abort_conn(fc);  in fuse_umount_begin()
450 	if (fm->fc->conn_init) {  in fuse_send_destroy()
482 	if (!fuse_allow_current_process(fm->fc)) {  in fuse_statfs()
513 static void fuse_sync_fs_writes(struct fuse_conn *fc)  in fuse_sync_fs_writes()  argument
519 	spin_lock(&fc->lock);  in fuse_sync_fs_writes()
520 	bucket = rcu_dereference_protected(fc->curr_bucket, 1);  in fuse_sync_fs_writes()
525 		spin_unlock(&fc->lock);  in fuse_sync_fs_writes()
535 	rcu_assign_pointer(fc->curr_bucket, new_bucket);  in fuse_sync_fs_writes()
536 	spin_unlock(&fc->lock);  in fuse_sync_fs_writes()
554 	struct fuse_conn *fc = fm->fc;  in fuse_sync_fs()  local
570 	if (!fc->sync_fs)  in fuse_sync_fs()
573 	fuse_sync_fs_writes(fc);  in fuse_sync_fs()
585 		fc->sync_fs = 0;  in fuse_sync_fs()
720 	struct fuse_conn *fc = get_fuse_conn_super(sb);  in fuse_show_options()  local
722 	if (fc->legacy_opts_show) {  in fuse_show_options()
724 			   from_kuid_munged(fc->user_ns, fc->user_id));  in fuse_show_options()
726 			   from_kgid_munged(fc->user_ns, fc->group_id));  in fuse_show_options()
727 		if (fc->default_permissions)  in fuse_show_options()
729 		if (fc->allow_other)  in fuse_show_options()
731 		if (fc->max_read != ~0)  in fuse_show_options()
732 			seq_printf(m, ",max_read=%u", fc->max_read);  in fuse_show_options()
737 	if (fc->dax)  in fuse_show_options()
770 void fuse_conn_init(struct fuse_conn *fc, struct fuse_mount *fm,  in fuse_conn_init()  argument
774 	memset(fc, 0, sizeof(*fc));  in fuse_conn_init()
775 	spin_lock_init(&fc->lock);  in fuse_conn_init()
776 	spin_lock_init(&fc->bg_lock);  in fuse_conn_init()
777 	init_rwsem(&fc->killsb);  in fuse_conn_init()
778 	refcount_set(&fc->count, 1);  in fuse_conn_init()
779 	atomic_set(&fc->dev_count, 1);  in fuse_conn_init()
780 	init_waitqueue_head(&fc->blocked_waitq);  in fuse_conn_init()
781 	fuse_iqueue_init(&fc->iq, fiq_ops, fiq_priv);  in fuse_conn_init()
782 	INIT_LIST_HEAD(&fc->bg_queue);  in fuse_conn_init()
783 	INIT_LIST_HEAD(&fc->entry);  in fuse_conn_init()
784 	INIT_LIST_HEAD(&fc->devices);  in fuse_conn_init()
785 	atomic_set(&fc->num_waiting, 0);  in fuse_conn_init()
786 	fc->max_background = FUSE_DEFAULT_MAX_BACKGROUND;  in fuse_conn_init()
787 	fc->congestion_threshold = FUSE_DEFAULT_CONGESTION_THRESHOLD;  in fuse_conn_init()
788 	atomic64_set(&fc->khctr, 0);  in fuse_conn_init()
789 	fc->polled_files = RB_ROOT;  in fuse_conn_init()
790 	fc->blocked = 0;  in fuse_conn_init()
791 	fc->initialized = 0;  in fuse_conn_init()
792 	fc->connected = 1;  in fuse_conn_init()
793 	atomic64_set(&fc->attr_version, 1);  in fuse_conn_init()
794 	get_random_bytes(&fc->scramble_key, sizeof(fc->scramble_key));  in fuse_conn_init()
795 	fc->pid_ns = get_pid_ns(task_active_pid_ns(current));  in fuse_conn_init()
796 	fc->user_ns = get_user_ns(user_ns);  in fuse_conn_init()
797 	fc->max_pages = FUSE_DEFAULT_MAX_PAGES_PER_REQ;  in fuse_conn_init()
798 	fc->max_pages_limit = FUSE_MAX_MAX_PAGES;  in fuse_conn_init()
800 	INIT_LIST_HEAD(&fc->mounts);  in fuse_conn_init()
801 	list_add(&fm->fc_entry, &fc->mounts);  in fuse_conn_init()
802 	fm->fc = fc;  in fuse_conn_init()
806 void fuse_conn_put(struct fuse_conn *fc)  in fuse_conn_put()  argument
808 	if (refcount_dec_and_test(&fc->count)) {  in fuse_conn_put()
809 		struct fuse_iqueue *fiq = &fc->iq;  in fuse_conn_put()
813 			fuse_dax_conn_free(fc);  in fuse_conn_put()
816 		put_pid_ns(fc->pid_ns);  in fuse_conn_put()
817 		put_user_ns(fc->user_ns);  in fuse_conn_put()
818 		bucket = rcu_dereference_protected(fc->curr_bucket, 1);  in fuse_conn_put()
823 		fc->release(fc);  in fuse_conn_put()
828 struct fuse_conn *fuse_conn_get(struct fuse_conn *fc)  in fuse_conn_get()  argument
830 	refcount_inc(&fc->count);  in fuse_conn_get()
831 	return fc;  in fuse_conn_get()
854 	struct fuse_conn *fc = get_fuse_conn_super(sb);  in fuse_get_dentry()  local
867 		if (!fc->export_support)  in fuse_get_dentry()
961 	struct fuse_conn *fc = get_fuse_conn(child_inode);  in fuse_get_parent()  local
967 	if (!fc->export_support)  in fuse_get_parent()
1030 static void process_init_limits(struct fuse_conn *fc, struct fuse_init_out *arg)  in process_init_limits()  argument
1040 	spin_lock(&fc->bg_lock);  in process_init_limits()
1042 		fc->max_background = arg->max_background;  in process_init_limits()
1044 		if (!cap_sys_admin && fc->max_background > max_user_bgreq)  in process_init_limits()
1045 			fc->max_background = max_user_bgreq;  in process_init_limits()
1048 		fc->congestion_threshold = arg->congestion_threshold;  in process_init_limits()
1051 		    fc->congestion_threshold > max_user_congthresh)  in process_init_limits()
1052 			fc->congestion_threshold = max_user_congthresh;  in process_init_limits()
1054 	spin_unlock(&fc->bg_lock);  in process_init_limits()
1066 	struct fuse_conn *fc = fm->fc;  in process_init_reply()  local
1076 		process_init_limits(fc, arg);  in process_init_reply()
1081 				fc->async_read = 1;  in process_init_reply()
1083 				fc->no_lock = 1;  in process_init_reply()
1086 					fc->no_flock = 1;  in process_init_reply()
1089 					fc->no_flock = 1;  in process_init_reply()
1092 				fc->atomic_o_trunc = 1;  in process_init_reply()
1096 					fc->export_support = 1;  in process_init_reply()
1099 				fc->big_writes = 1;  in process_init_reply()
1101 				fc->dont_mask = 1;  in process_init_reply()
1103 				fc->auto_inval_data = 1;  in process_init_reply()
1105 				fc->explicit_inval_data = 1;  in process_init_reply()
1107 				fc->do_readdirplus = 1;  in process_init_reply()
1109 					fc->readdirplus_auto = 1;  in process_init_reply()
1112 				fc->async_dio = 1;  in process_init_reply()
1114 				fc->writeback_cache = 1;  in process_init_reply()
1116 				fc->parallel_dirops = 1;  in process_init_reply()
1118 				fc->handle_killpriv = 1;  in process_init_reply()
1122 				fc->default_permissions = 1;  in process_init_reply()
1123 				fc->posix_acl = 1;  in process_init_reply()
1127 				fc->cache_symlinks = 1;  in process_init_reply()
1129 				fc->abort_err = 1;  in process_init_reply()
1131 				fc->max_pages =  in process_init_reply()
1132 					min_t(unsigned int, fc->max_pages_limit,  in process_init_reply()
1137 			    !fuse_dax_check_alignment(fc, arg->map_alignment)) {  in process_init_reply()
1141 				fc->handle_killpriv_v2 = 1;  in process_init_reply()
1145 				fc->setxattr_ext = 1;  in process_init_reply()
1147 			ra_pages = fc->max_read / PAGE_SIZE;  in process_init_reply()
1148 			fc->no_lock = 1;  in process_init_reply()
1149 			fc->no_flock = 1;  in process_init_reply()
1154 		fc->minor = arg->minor;  in process_init_reply()
1155 		fc->max_write = arg->minor < 5 ? 4096 : arg->max_write;  in process_init_reply()
1156 		fc->max_write = max_t(unsigned, 4096, fc->max_write);  in process_init_reply()
1157 		fc->conn_init = 1;  in process_init_reply()
1162 		fc->conn_init = 0;  in process_init_reply()
1163 		fc->conn_error = 1;  in process_init_reply()
1166 	fuse_set_initialized(fc);  in process_init_reply()
1167 	wake_up_all(&fc->blocked_waitq);  in process_init_reply()
1191 	if (fm->fc->dax)  in fuse_send_init()
1194 	if (fm->fc->auto_submounts)  in fuse_send_init()
1217 void fuse_free_conn(struct fuse_conn *fc)  in fuse_free_conn()  argument
1219 	WARN_ON(!list_empty(&fc->devices));  in fuse_free_conn()
1220 	kfree_rcu(fc, rcu);  in fuse_free_conn()
1224 static int fuse_bdi_init(struct fuse_conn *fc, struct super_block *sb)  in fuse_bdi_init()  argument
1238 	err = super_setup_bdi_name(sb, "%u:%u%s", MAJOR(fc->dev),  in fuse_bdi_init()
1239 				   MINOR(fc->dev), suffix);  in fuse_bdi_init()
1286 void fuse_dev_install(struct fuse_dev *fud, struct fuse_conn *fc)  in fuse_dev_install()  argument
1288 	fud->fc = fuse_conn_get(fc);  in fuse_dev_install()
1289 	spin_lock(&fc->lock);  in fuse_dev_install()
1290 	list_add_tail(&fud->entry, &fc->devices);  in fuse_dev_install()
1291 	spin_unlock(&fc->lock);  in fuse_dev_install()
1295 struct fuse_dev *fuse_dev_alloc_install(struct fuse_conn *fc)  in fuse_dev_alloc_install()  argument
1303 	fuse_dev_install(fud, fc);  in fuse_dev_alloc_install()
1310 	struct fuse_conn *fc = fud->fc;  in fuse_dev_free()  local
1312 	if (fc) {  in fuse_dev_free()
1313 		spin_lock(&fc->lock);  in fuse_dev_free()
1315 		spin_unlock(&fc->lock);  in fuse_dev_free()
1317 		fuse_conn_put(fc);  in fuse_dev_free()
1410 	struct fuse_conn *fc = get_fuse_conn(&mp_fi->inode);  in fuse_get_tree_submount()  local
1418 	fm->fc = fuse_conn_get(fc);  in fuse_get_tree_submount()
1433 	down_write(&fc->killsb);  in fuse_get_tree_submount()
1434 	list_add_tail(&fm->fc_entry, &fc->mounts);  in fuse_get_tree_submount()
1435 	up_write(&fc->killsb);  in fuse_get_tree_submount()
1458 	struct fuse_conn *fc = fm->fc;  in fuse_fill_super_common()  local
1467 	rcu_assign_pointer(fc->curr_bucket, fuse_sync_bucket_alloc());  in fuse_fill_super_common()
1484 		err = fuse_dax_conn_alloc(fc, ctx->dax_dev);  in fuse_fill_super_common()
1491 		fud = fuse_dev_alloc_install(fc);  in fuse_fill_super_common()
1496 	fc->dev = sb->s_dev;  in fuse_fill_super_common()
1498 	err = fuse_bdi_init(fc, sb);  in fuse_fill_super_common()
1504 		fc->dont_mask = 1;  in fuse_fill_super_common()
1507 	fc->default_permissions = ctx->default_permissions;  in fuse_fill_super_common()
1508 	fc->allow_other = ctx->allow_other;  in fuse_fill_super_common()
1509 	fc->user_id = ctx->user_id;  in fuse_fill_super_common()
1510 	fc->group_id = ctx->group_id;  in fuse_fill_super_common()
1511 	fc->legacy_opts_show = ctx->legacy_opts_show;  in fuse_fill_super_common()
1512 	fc->max_read = max_t(unsigned int, 4096, ctx->max_read);  in fuse_fill_super_common()
1513 	fc->destroy = ctx->destroy;  in fuse_fill_super_common()
1514 	fc->no_control = ctx->no_control;  in fuse_fill_super_common()
1515 	fc->no_force_umount = ctx->no_force_umount;  in fuse_fill_super_common()
1531 	err = fuse_ctl_add_conn(fc);  in fuse_fill_super_common()
1535 	list_add_tail(&fc->entry, &fuse_conn_list);  in fuse_fill_super_common()
1550 		fuse_dax_conn_free(fc);  in fuse_fill_super_common()
1602 	struct fuse_conn *fc;  in fuse_get_tree()  local
1607 	fc = kmalloc(sizeof(*fc), GFP_KERNEL);  in fuse_get_tree()
1608 	if (!fc)  in fuse_get_tree()
1613 		kfree(fc);  in fuse_get_tree()
1617 	fuse_conn_init(fc, fm, fsc->user_ns, &fuse_dev_fiq_ops, NULL);  in fuse_get_tree()
1618 	fc->release = fuse_free_conn;  in fuse_get_tree()
1643 		fsc->sget_key = fud->fc;  in fuse_get_tree()
1695 	struct fuse_conn *fc = fm->fc;  in fuse_mount_remove()  local
1698 	down_write(&fc->killsb);  in fuse_mount_remove()
1700 	if (list_empty(&fc->mounts))  in fuse_mount_remove()
1702 	up_write(&fc->killsb);  in fuse_mount_remove()
1710 	struct fuse_conn *fc = fm->fc;  in fuse_conn_destroy()  local
1712 	if (fc->destroy)  in fuse_conn_destroy()
1715 	fuse_abort_conn(fc);  in fuse_conn_destroy()
1716 	fuse_wait_aborted(fc);  in fuse_conn_destroy()
1718 	if (!list_empty(&fc->entry)) {  in fuse_conn_destroy()
1720 		list_del(&fc->entry);  in fuse_conn_destroy()
1721 		fuse_ctl_remove_conn(fc);  in fuse_conn_destroy()
1741 	fuse_conn_put(fm->fc);  in fuse_mount_destroy()