35 void fuse_backing_files_init(struct fuse_conn *fc)  in fuse_backing_files_init()  argument
37 	idr_init(&fc->backing_files_map);  in fuse_backing_files_init()
40 static int fuse_backing_id_alloc(struct fuse_conn *fc, struct fuse_backing *fb)  in fuse_backing_id_alloc()  argument
45 	spin_lock(&fc->lock);  in fuse_backing_id_alloc()
47 	id = idr_alloc_cyclic(&fc->backing_files_map, fb, 1, 0, GFP_ATOMIC);  in fuse_backing_id_alloc()
48 	spin_unlock(&fc->lock);  in fuse_backing_id_alloc()
55 static struct fuse_backing *fuse_backing_id_remove(struct fuse_conn *fc,  in fuse_backing_id_remove()  argument
60 	spin_lock(&fc->lock);  in fuse_backing_id_remove()
61 	fb = idr_remove(&fc->backing_files_map, id);  in fuse_backing_id_remove()
62 	spin_unlock(&fc->lock);  in fuse_backing_id_remove()
76 void fuse_backing_files_free(struct fuse_conn *fc)  in fuse_backing_files_free()  argument
78 	idr_for_each(&fc->backing_files_map, fuse_backing_id_free, NULL);  in fuse_backing_files_free()
79 	idr_destroy(&fc->backing_files_map);  in fuse_backing_files_free()
82 int fuse_backing_open(struct fuse_conn *fc, struct fuse_backing_map *map)  in fuse_backing_open()  argument
93 	if (!fc->passthrough || !capable(CAP_SYS_ADMIN))  in fuse_backing_open()
112 	if (backing_sb->s_stack_depth >= fc->max_stack_depth)  in fuse_backing_open()
124 	res = fuse_backing_id_alloc(fc, fb);  in fuse_backing_open()
140 int fuse_backing_close(struct fuse_conn *fc, int backing_id)  in fuse_backing_close()  argument
149 	if (!fc->passthrough || !capable(CAP_SYS_ADMIN))  in fuse_backing_close()
157 	fb = fuse_backing_id_remove(fc, backing_id);  in fuse_backing_close()
169 struct fuse_backing *fuse_backing_lookup(struct fuse_conn *fc, int backing_id)  in fuse_backing_lookup()  argument
174 	fb = idr_find(&fc->backing_files_map, backing_id);  in fuse_backing_lookup()