134 		struct fuse_conn *fc = get_fuse_conn(inode);  in fuse_evict_inode()  local
136 		fuse_queue_forget(fc, fi->forget, fi->nodeid, fi->nlookup);  in fuse_evict_inode()
165 	struct fuse_conn *fc = get_fuse_conn(inode);  in fuse_change_attributes_common()  local
168 	fi->attr_version = ++fc->attr_version;  in fuse_change_attributes_common()
174 	inode->i_uid     = make_kuid(fc->user_ns, attr->uid);  in fuse_change_attributes_common()
175 	inode->i_gid     = make_kgid(fc->user_ns, attr->gid);  in fuse_change_attributes_common()
180 	if (!fc->writeback_cache || !S_ISREG(inode->i_mode)) {  in fuse_change_attributes_common()
198 	if (!fc->default_permissions)  in fuse_change_attributes_common()
207 	struct fuse_conn *fc = get_fuse_conn(inode);  in fuse_change_attributes()  local
209 	bool is_wb = fc->writeback_cache;  in fuse_change_attributes()
213 	spin_lock(&fc->lock);  in fuse_change_attributes()
216 		spin_unlock(&fc->lock);  in fuse_change_attributes()
231 	spin_unlock(&fc->lock);  in fuse_change_attributes()
239 		} else if (fc->auto_inval_data) {  in fuse_change_attributes()
304 	struct fuse_conn *fc = get_fuse_conn_super(sb);  in fuse_iget()  local
313 		if (!fc->writeback_cache || !S_ISREG(attr->mode))  in fuse_iget()
326 	spin_lock(&fc->lock);  in fuse_iget()
328 	spin_unlock(&fc->lock);  in fuse_iget()
383 static void fuse_send_destroy(struct fuse_conn *fc)  in fuse_send_destroy()  argument
385 	struct fuse_req *req = fc->destroy_req;  in fuse_send_destroy()
386 	if (req && fc->conn_init) {  in fuse_send_destroy()
387 		fc->destroy_req = NULL;  in fuse_send_destroy()
391 		fuse_request_send(fc, req);  in fuse_send_destroy()
392 		fuse_put_request(fc, req);  in fuse_send_destroy()
398 	struct fuse_conn *fc = get_fuse_conn_super(sb);  in fuse_put_super()  local
401 	list_del(&fc->entry);  in fuse_put_super()
402 	fuse_ctl_remove_conn(fc);  in fuse_put_super()
405 	fuse_conn_put(fc);  in fuse_put_super()
425 	struct fuse_conn *fc = get_fuse_conn_super(sb);  in fuse_statfs()  local
430 	if (!fuse_allow_current_process(fc)) {  in fuse_statfs()
442 	err = fuse_simple_request(fc, &args);  in fuse_statfs()
570 	struct fuse_conn *fc = get_fuse_conn_super(sb);  in fuse_show_options()  local
572 	seq_printf(m, ",user_id=%u", from_kuid_munged(fc->user_ns, fc->user_id));  in fuse_show_options()
573 	seq_printf(m, ",group_id=%u", from_kgid_munged(fc->user_ns, fc->group_id));  in fuse_show_options()
574 	if (fc->default_permissions)  in fuse_show_options()
576 	if (fc->allow_other)  in fuse_show_options()
578 	if (fc->max_read != ~0)  in fuse_show_options()
579 		seq_printf(m, ",max_read=%u", fc->max_read);  in fuse_show_options()
604 void fuse_conn_init(struct fuse_conn *fc, struct user_namespace *user_ns)  in fuse_conn_init()  argument
606 	memset(fc, 0, sizeof(*fc));  in fuse_conn_init()
607 	spin_lock_init(&fc->lock);  in fuse_conn_init()
608 	init_rwsem(&fc->killsb);  in fuse_conn_init()
609 	refcount_set(&fc->count, 1);  in fuse_conn_init()
610 	atomic_set(&fc->dev_count, 1);  in fuse_conn_init()
611 	init_waitqueue_head(&fc->blocked_waitq);  in fuse_conn_init()
612 	init_waitqueue_head(&fc->reserved_req_waitq);  in fuse_conn_init()
613 	fuse_iqueue_init(&fc->iq);  in fuse_conn_init()
614 	INIT_LIST_HEAD(&fc->bg_queue);  in fuse_conn_init()
615 	INIT_LIST_HEAD(&fc->entry);  in fuse_conn_init()
616 	INIT_LIST_HEAD(&fc->devices);  in fuse_conn_init()
617 	atomic_set(&fc->num_waiting, 0);  in fuse_conn_init()
618 	fc->max_background = FUSE_DEFAULT_MAX_BACKGROUND;  in fuse_conn_init()
619 	fc->congestion_threshold = FUSE_DEFAULT_CONGESTION_THRESHOLD;  in fuse_conn_init()
620 	fc->khctr = 0;  in fuse_conn_init()
621 	fc->polled_files = RB_ROOT;  in fuse_conn_init()
622 	fc->blocked = 0;  in fuse_conn_init()
623 	fc->initialized = 0;  in fuse_conn_init()
624 	fc->connected = 1;  in fuse_conn_init()
625 	fc->attr_version = 1;  in fuse_conn_init()
626 	get_random_bytes(&fc->scramble_key, sizeof(fc->scramble_key));  in fuse_conn_init()
627 	fc->pid_ns = get_pid_ns(task_active_pid_ns(current));  in fuse_conn_init()
628 	fc->user_ns = get_user_ns(user_ns);  in fuse_conn_init()
632 void fuse_conn_put(struct fuse_conn *fc)  in fuse_conn_put()  argument
634 	if (refcount_dec_and_test(&fc->count)) {  in fuse_conn_put()
635 		if (fc->destroy_req)  in fuse_conn_put()
636 			fuse_request_free(fc->destroy_req);  in fuse_conn_put()
637 		put_pid_ns(fc->pid_ns);  in fuse_conn_put()
638 		put_user_ns(fc->user_ns);  in fuse_conn_put()
639 		fc->release(fc);  in fuse_conn_put()
644 struct fuse_conn *fuse_conn_get(struct fuse_conn *fc)  in fuse_conn_get()  argument
646 	refcount_inc(&fc->count);  in fuse_conn_get()
647 	return fc;  in fuse_conn_get()
670 	struct fuse_conn *fc = get_fuse_conn_super(sb);  in fuse_get_dentry()  local
683 		if (!fc->export_support)  in fuse_get_dentry()
777 	struct fuse_conn *fc = get_fuse_conn(child_inode);  in fuse_get_parent()  local
784 	if (!fc->export_support)  in fuse_get_parent()
845 static void process_init_limits(struct fuse_conn *fc, struct fuse_init_out *arg)  in process_init_limits()  argument
856 		fc->max_background = arg->max_background;  in process_init_limits()
858 		if (!cap_sys_admin && fc->max_background > max_user_bgreq)  in process_init_limits()
859 			fc->max_background = max_user_bgreq;  in process_init_limits()
862 		fc->congestion_threshold = arg->congestion_threshold;  in process_init_limits()
865 		    fc->congestion_threshold > max_user_congthresh)  in process_init_limits()
866 			fc->congestion_threshold = max_user_congthresh;  in process_init_limits()
870 static void process_init_reply(struct fuse_conn *fc, struct fuse_req *req)  in process_init_reply()  argument
875 		fc->conn_error = 1;  in process_init_reply()
879 		process_init_limits(fc, arg);  in process_init_reply()
884 				fc->async_read = 1;  in process_init_reply()
886 				fc->no_lock = 1;  in process_init_reply()
889 					fc->no_flock = 1;  in process_init_reply()
892 					fc->no_flock = 1;  in process_init_reply()
895 				fc->atomic_o_trunc = 1;  in process_init_reply()
899 					fc->export_support = 1;  in process_init_reply()
902 				fc->big_writes = 1;  in process_init_reply()
904 				fc->dont_mask = 1;  in process_init_reply()
906 				fc->auto_inval_data = 1;  in process_init_reply()
908 				fc->do_readdirplus = 1;  in process_init_reply()
910 					fc->readdirplus_auto = 1;  in process_init_reply()
913 				fc->async_dio = 1;  in process_init_reply()
915 				fc->writeback_cache = 1;  in process_init_reply()
917 				fc->parallel_dirops = 1;  in process_init_reply()
919 				fc->handle_killpriv = 1;  in process_init_reply()
921 				fc->sb->s_time_gran = arg->time_gran;  in process_init_reply()
923 				fc->default_permissions = 1;  in process_init_reply()
924 				fc->posix_acl = 1;  in process_init_reply()
925 				fc->sb->s_xattr = fuse_acl_xattr_handlers;  in process_init_reply()
928 				fc->abort_err = 1;  in process_init_reply()
930 			ra_pages = fc->max_read / PAGE_SIZE;  in process_init_reply()
931 			fc->no_lock = 1;  in process_init_reply()
932 			fc->no_flock = 1;  in process_init_reply()
935 		fc->sb->s_bdi->ra_pages =  in process_init_reply()
936 				min(fc->sb->s_bdi->ra_pages, ra_pages);  in process_init_reply()
937 		fc->minor = arg->minor;  in process_init_reply()
938 		fc->max_write = arg->minor < 5 ? 4096 : arg->max_write;  in process_init_reply()
939 		fc->max_write = max_t(unsigned, 4096, fc->max_write);  in process_init_reply()
940 		fc->conn_init = 1;  in process_init_reply()
942 	fuse_set_initialized(fc);  in process_init_reply()
943 	wake_up_all(&fc->blocked_waitq);  in process_init_reply()
946 static void fuse_send_init(struct fuse_conn *fc, struct fuse_req *req)  in fuse_send_init()  argument
952 	arg->max_readahead = fc->sb->s_bdi->ra_pages * PAGE_SIZE;  in fuse_send_init()
973 	fuse_request_send_background(fc, req);  in fuse_send_init()
976 static void fuse_free_conn(struct fuse_conn *fc)  in fuse_free_conn()  argument
978 	WARN_ON(!list_empty(&fc->devices));  in fuse_free_conn()
979 	kfree_rcu(fc, rcu);  in fuse_free_conn()
982 static int fuse_bdi_init(struct fuse_conn *fc, struct super_block *sb)  in fuse_bdi_init()  argument
996 	err = super_setup_bdi_name(sb, "%u:%u%s", MAJOR(fc->dev),  in fuse_bdi_init()
997 				   MINOR(fc->dev), suffix);  in fuse_bdi_init()
1022 struct fuse_dev *fuse_dev_alloc(struct fuse_conn *fc)  in fuse_dev_alloc()  argument
1028 		fud->fc = fuse_conn_get(fc);  in fuse_dev_alloc()
1031 		spin_lock(&fc->lock);  in fuse_dev_alloc()
1032 		list_add_tail(&fud->entry, &fc->devices);  in fuse_dev_alloc()
1033 		spin_unlock(&fc->lock);  in fuse_dev_alloc()
1042 	struct fuse_conn *fc = fud->fc;  in fuse_dev_free()  local
1044 	if (fc) {  in fuse_dev_free()
1045 		spin_lock(&fc->lock);  in fuse_dev_free()
1047 		spin_unlock(&fc->lock);  in fuse_dev_free()
1049 		fuse_conn_put(fc);  in fuse_dev_free()
1058 	struct fuse_conn *fc;  in fuse_fill_super()  local
1116 	fc = kmalloc(sizeof(*fc), GFP_KERNEL);  in fuse_fill_super()
1118 	if (!fc)  in fuse_fill_super()
1121 	fuse_conn_init(fc, sb->s_user_ns);  in fuse_fill_super()
1122 	fc->release = fuse_free_conn;  in fuse_fill_super()
1124 	fud = fuse_dev_alloc(fc);  in fuse_fill_super()
1128 	fc->dev = sb->s_dev;  in fuse_fill_super()
1129 	fc->sb = sb;  in fuse_fill_super()
1130 	err = fuse_bdi_init(fc, sb);  in fuse_fill_super()
1136 		fc->dont_mask = 1;  in fuse_fill_super()
1139 	fc->default_permissions = d.default_permissions;  in fuse_fill_super()
1140 	fc->allow_other = d.allow_other;  in fuse_fill_super()
1141 	fc->user_id = d.user_id;  in fuse_fill_super()
1142 	fc->group_id = d.group_id;  in fuse_fill_super()
1143 	fc->max_read = max_t(unsigned, 4096, d.max_read);  in fuse_fill_super()
1146 	sb->s_fs_info = fc;  in fuse_fill_super()
1163 		fc->destroy_req = fuse_request_alloc(0);  in fuse_fill_super()
1164 		if (!fc->destroy_req)  in fuse_fill_super()
1173 	err = fuse_ctl_add_conn(fc);  in fuse_fill_super()
1177 	list_add_tail(&fc->entry, &fuse_conn_list);  in fuse_fill_super()
1188 	fuse_send_init(fc, init_req);  in fuse_fill_super()
1201 	fuse_conn_put(fc);  in fuse_fill_super()
1218 	struct fuse_conn *fc = get_fuse_conn_super(sb);  in fuse_sb_destroy()  local
1220 	if (fc) {  in fuse_sb_destroy()
1221 		fuse_send_destroy(fc);  in fuse_sb_destroy()
1223 		fuse_abort_conn(fc, false);  in fuse_sb_destroy()
1224 		fuse_wait_aborted(fc);  in fuse_sb_destroy()
1226 		down_write(&fc->killsb);  in fuse_sb_destroy()
1227 		fc->sb = NULL;  in fuse_sb_destroy()
1228 		up_write(&fc->killsb);  in fuse_sb_destroy()