open() and may thus be omitted by the filesystem. When writeback caching is enabled, the kernel may send read requests even for files opened with O_WRONLY. The filesystem should be prepared to handle this fuse_reply_open(fuse_req_t req, const struct fuse_file_info *f) { ... fill_open(&arg, f); return send_reply_ok(req, &arg, sizeof(arg)); } static void fill_open(struct fuse_open_out *arg, const

读cache流程 • 写cache流程基于inode cache优化 • bpf程序类型 BPF_PROG_TYPE_EXTFUSE • Hook点及⽅法 • fuse_request_send • FUSE_LOOKUP / FUSE_GETATTR / FUSE_SETATTR / • map 结构 • dentry map BPF_MAP_TYPE_HASH • key