129 		struct fuse_conn *fc = get_fuse_conn(inode);  in fuse_evict_inode()  local
131 		fuse_queue_forget(fc, fi->forget, fi->nodeid, fi->nlookup);  in fuse_evict_inode()
160 	struct fuse_conn *fc = get_fuse_conn(inode);  in fuse_change_attributes_common()  local
163 	fi->attr_version = ++fc->attr_version;  in fuse_change_attributes_common()
175 	if (!fc->writeback_cache || !S_ISREG(inode->i_mode)) {  in fuse_change_attributes_common()
193 	if (!(fc->flags & FUSE_DEFAULT_PERMISSIONS))  in fuse_change_attributes_common()
202 	struct fuse_conn *fc = get_fuse_conn(inode);  in fuse_change_attributes()  local
204 	bool is_wb = fc->writeback_cache;  in fuse_change_attributes()
208 	spin_lock(&fc->lock);  in fuse_change_attributes()
211 		spin_unlock(&fc->lock);  in fuse_change_attributes()
226 	spin_unlock(&fc->lock);  in fuse_change_attributes()
234 		} else if (fc->auto_inval_data) {  in fuse_change_attributes()
299 	struct fuse_conn *fc = get_fuse_conn_super(sb);  in fuse_iget()  local
308 		if (!fc->writeback_cache || !S_ISREG(attr->mode))  in fuse_iget()
321 	spin_lock(&fc->lock);  in fuse_iget()
323 	spin_unlock(&fc->lock);  in fuse_iget()
359 static void fuse_send_destroy(struct fuse_conn *fc)  in fuse_send_destroy()  argument
361 	struct fuse_req *req = fc->destroy_req;  in fuse_send_destroy()
362 	if (req && fc->conn_init) {  in fuse_send_destroy()
363 		fc->destroy_req = NULL;  in fuse_send_destroy()
367 		fuse_request_send(fc, req);  in fuse_send_destroy()
368 		fuse_put_request(fc, req);  in fuse_send_destroy()
372 static void fuse_bdi_destroy(struct fuse_conn *fc)  in fuse_bdi_destroy()  argument
374 	if (fc->bdi_initialized)  in fuse_bdi_destroy()
375 		bdi_destroy(&fc->bdi);  in fuse_bdi_destroy()
380 	struct fuse_conn *fc = get_fuse_conn_super(sb);  in fuse_put_super()  local
382 	fuse_send_destroy(fc);  in fuse_put_super()
384 	fuse_abort_conn(fc);  in fuse_put_super()
386 	list_del(&fc->entry);  in fuse_put_super()
387 	fuse_ctl_remove_conn(fc);  in fuse_put_super()
389 	fuse_bdi_destroy(fc);  in fuse_put_super()
391 	fuse_conn_put(fc);  in fuse_put_super()
411 	struct fuse_conn *fc = get_fuse_conn_super(sb);  in fuse_statfs()  local
416 	if (!fuse_allow_current_process(fc)) {  in fuse_statfs()
428 	err = fuse_simple_request(fc, &args);  in fuse_statfs()
555 	struct fuse_conn *fc = get_fuse_conn_super(sb);  in fuse_show_options()  local
557 	seq_printf(m, ",user_id=%u", from_kuid_munged(&init_user_ns, fc->user_id));  in fuse_show_options()
558 	seq_printf(m, ",group_id=%u", from_kgid_munged(&init_user_ns, fc->group_id));  in fuse_show_options()
559 	if (fc->flags & FUSE_DEFAULT_PERMISSIONS)  in fuse_show_options()
561 	if (fc->flags & FUSE_ALLOW_OTHER)  in fuse_show_options()
563 	if (fc->max_read != ~0)  in fuse_show_options()
564 		seq_printf(m, ",max_read=%u", fc->max_read);  in fuse_show_options()
589 void fuse_conn_init(struct fuse_conn *fc)  in fuse_conn_init()  argument
591 	memset(fc, 0, sizeof(*fc));  in fuse_conn_init()
592 	spin_lock_init(&fc->lock);  in fuse_conn_init()
593 	init_rwsem(&fc->killsb);  in fuse_conn_init()
594 	atomic_set(&fc->count, 1);  in fuse_conn_init()
595 	atomic_set(&fc->dev_count, 1);  in fuse_conn_init()
596 	init_waitqueue_head(&fc->blocked_waitq);  in fuse_conn_init()
597 	init_waitqueue_head(&fc->reserved_req_waitq);  in fuse_conn_init()
598 	fuse_iqueue_init(&fc->iq);  in fuse_conn_init()
599 	INIT_LIST_HEAD(&fc->bg_queue);  in fuse_conn_init()
600 	INIT_LIST_HEAD(&fc->entry);  in fuse_conn_init()
601 	INIT_LIST_HEAD(&fc->devices);  in fuse_conn_init()
602 	atomic_set(&fc->num_waiting, 0);  in fuse_conn_init()
603 	fc->max_background = FUSE_DEFAULT_MAX_BACKGROUND;  in fuse_conn_init()
604 	fc->congestion_threshold = FUSE_DEFAULT_CONGESTION_THRESHOLD;  in fuse_conn_init()
605 	fc->khctr = 0;  in fuse_conn_init()
606 	fc->polled_files = RB_ROOT;  in fuse_conn_init()
607 	fc->blocked = 0;  in fuse_conn_init()
608 	fc->initialized = 0;  in fuse_conn_init()
609 	fc->connected = 1;  in fuse_conn_init()
610 	fc->attr_version = 1;  in fuse_conn_init()
611 	get_random_bytes(&fc->scramble_key, sizeof(fc->scramble_key));  in fuse_conn_init()
615 void fuse_conn_put(struct fuse_conn *fc)  in fuse_conn_put()  argument
617 	if (atomic_dec_and_test(&fc->count)) {  in fuse_conn_put()
618 		if (fc->destroy_req)  in fuse_conn_put()
619 			fuse_request_free(fc->destroy_req);  in fuse_conn_put()
620 		fc->release(fc);  in fuse_conn_put()
625 struct fuse_conn *fuse_conn_get(struct fuse_conn *fc)  in fuse_conn_get()  argument
627 	atomic_inc(&fc->count);  in fuse_conn_get()
628 	return fc;  in fuse_conn_get()
651 	struct fuse_conn *fc = get_fuse_conn_super(sb);  in fuse_get_dentry()  local
664 		if (!fc->export_support)  in fuse_get_dentry()
760 	struct fuse_conn *fc = get_fuse_conn(child_inode);  in fuse_get_parent()  local
767 	if (!fc->export_support)  in fuse_get_parent()
830 static void process_init_limits(struct fuse_conn *fc, struct fuse_init_out *arg)  in process_init_limits()  argument
841 		fc->max_background = arg->max_background;  in process_init_limits()
843 		if (!cap_sys_admin && fc->max_background > max_user_bgreq)  in process_init_limits()
844 			fc->max_background = max_user_bgreq;  in process_init_limits()
847 		fc->congestion_threshold = arg->congestion_threshold;  in process_init_limits()
850 		    fc->congestion_threshold > max_user_congthresh)  in process_init_limits()
851 			fc->congestion_threshold = max_user_congthresh;  in process_init_limits()
855 static void process_init_reply(struct fuse_conn *fc, struct fuse_req *req)  in process_init_reply()  argument
860 		fc->conn_error = 1;  in process_init_reply()
864 		process_init_limits(fc, arg);  in process_init_reply()
869 				fc->async_read = 1;  in process_init_reply()
871 				fc->no_lock = 1;  in process_init_reply()
874 					fc->no_flock = 1;  in process_init_reply()
877 					fc->no_flock = 1;  in process_init_reply()
880 				fc->atomic_o_trunc = 1;  in process_init_reply()
884 					fc->export_support = 1;  in process_init_reply()
887 				fc->big_writes = 1;  in process_init_reply()
889 				fc->dont_mask = 1;  in process_init_reply()
891 				fc->auto_inval_data = 1;  in process_init_reply()
893 				fc->do_readdirplus = 1;  in process_init_reply()
895 					fc->readdirplus_auto = 1;  in process_init_reply()
898 				fc->async_dio = 1;  in process_init_reply()
900 				fc->writeback_cache = 1;  in process_init_reply()
902 				fc->sb->s_time_gran = arg->time_gran;  in process_init_reply()
904 			ra_pages = fc->max_read / PAGE_CACHE_SIZE;  in process_init_reply()
905 			fc->no_lock = 1;  in process_init_reply()
906 			fc->no_flock = 1;  in process_init_reply()
909 		fc->bdi.ra_pages = min(fc->bdi.ra_pages, ra_pages);  in process_init_reply()
910 		fc->minor = arg->minor;  in process_init_reply()
911 		fc->max_write = arg->minor < 5 ? 4096 : arg->max_write;  in process_init_reply()
912 		fc->max_write = max_t(unsigned, 4096, fc->max_write);  in process_init_reply()
913 		fc->conn_init = 1;  in process_init_reply()
915 	fuse_set_initialized(fc);  in process_init_reply()
916 	wake_up_all(&fc->blocked_waitq);  in process_init_reply()
919 static void fuse_send_init(struct fuse_conn *fc, struct fuse_req *req)  in fuse_send_init()  argument
925 	arg->max_readahead = fc->bdi.ra_pages * PAGE_CACHE_SIZE;  in fuse_send_init()
944 	fuse_request_send_background(fc, req);  in fuse_send_init()
947 static void fuse_free_conn(struct fuse_conn *fc)  in fuse_free_conn()  argument
949 	WARN_ON(!list_empty(&fc->devices));  in fuse_free_conn()
950 	kfree_rcu(fc, rcu);  in fuse_free_conn()
953 static int fuse_bdi_init(struct fuse_conn *fc, struct super_block *sb)  in fuse_bdi_init()  argument
957 	fc->bdi.name = "fuse";  in fuse_bdi_init()
958 	fc->bdi.ra_pages = (VM_MAX_READAHEAD * 1024) / PAGE_CACHE_SIZE;  in fuse_bdi_init()
960 	fc->bdi.capabilities = BDI_CAP_NO_ACCT_WB | BDI_CAP_STRICTLIMIT;  in fuse_bdi_init()
962 	err = bdi_init(&fc->bdi);  in fuse_bdi_init()
966 	fc->bdi_initialized = 1;  in fuse_bdi_init()
969 		err =  bdi_register(&fc->bdi, NULL, "%u:%u-fuseblk",  in fuse_bdi_init()
970 				    MAJOR(fc->dev), MINOR(fc->dev));  in fuse_bdi_init()
972 		err = bdi_register_dev(&fc->bdi, fc->dev);  in fuse_bdi_init()
990 	bdi_set_max_ratio(&fc->bdi, 1);  in fuse_bdi_init()
995 struct fuse_dev *fuse_dev_alloc(struct fuse_conn *fc)  in fuse_dev_alloc()  argument
1001 		fud->fc = fuse_conn_get(fc);  in fuse_dev_alloc()
1004 		spin_lock(&fc->lock);  in fuse_dev_alloc()
1005 		list_add_tail(&fud->entry, &fc->devices);  in fuse_dev_alloc()
1006 		spin_unlock(&fc->lock);  in fuse_dev_alloc()
1015 	struct fuse_conn *fc = fud->fc;  in fuse_dev_free()  local
1017 	if (fc) {  in fuse_dev_free()
1018 		spin_lock(&fc->lock);  in fuse_dev_free()
1020 		spin_unlock(&fc->lock);  in fuse_dev_free()
1022 		fuse_conn_put(fc);  in fuse_dev_free()
1031 	struct fuse_conn *fc;  in fuse_fill_super()  local
1074 	fc = kmalloc(sizeof(*fc), GFP_KERNEL);  in fuse_fill_super()
1076 	if (!fc)  in fuse_fill_super()
1079 	fuse_conn_init(fc);  in fuse_fill_super()
1080 	fc->release = fuse_free_conn;  in fuse_fill_super()
1082 	fud = fuse_dev_alloc(fc);  in fuse_fill_super()
1086 	fc->dev = sb->s_dev;  in fuse_fill_super()
1087 	fc->sb = sb;  in fuse_fill_super()
1088 	err = fuse_bdi_init(fc, sb);  in fuse_fill_super()
1092 	sb->s_bdi = &fc->bdi;  in fuse_fill_super()
1096 		fc->dont_mask = 1;  in fuse_fill_super()
1099 	fc->flags = d.flags;  in fuse_fill_super()
1100 	fc->user_id = d.user_id;  in fuse_fill_super()
1101 	fc->group_id = d.group_id;  in fuse_fill_super()
1102 	fc->max_read = max_t(unsigned, 4096, d.max_read);  in fuse_fill_super()
1105 	sb->s_fs_info = fc;  in fuse_fill_super()
1121 		fc->destroy_req = fuse_request_alloc(0);  in fuse_fill_super()
1122 		if (!fc->destroy_req)  in fuse_fill_super()
1131 	err = fuse_ctl_add_conn(fc);  in fuse_fill_super()
1135 	list_add_tail(&fc->entry, &fuse_conn_list);  in fuse_fill_super()
1146 	fuse_send_init(fc, init_req);  in fuse_fill_super()
1159 	fuse_bdi_destroy(fc);  in fuse_fill_super()
1160 	fuse_conn_put(fc);  in fuse_fill_super()
1176 	struct fuse_conn *fc = get_fuse_conn_super(sb);  in fuse_kill_sb_anon()  local
1178 	if (fc) {  in fuse_kill_sb_anon()
1179 		down_write(&fc->killsb);  in fuse_kill_sb_anon()
1180 		fc->sb = NULL;  in fuse_kill_sb_anon()
1181 		up_write(&fc->killsb);  in fuse_kill_sb_anon()
1206 	struct fuse_conn *fc = get_fuse_conn_super(sb);  in fuse_kill_sb_blk()  local
1208 	if (fc) {  in fuse_kill_sb_blk()
1209 		down_write(&fc->killsb);  in fuse_kill_sb_blk()
1210 		fc->sb = NULL;  in fuse_kill_sb_blk()
1211 		up_write(&fc->killsb);  in fuse_kill_sb_blk()