10 #define FUSE_USE_VERSION 30 
   13 #include <fuse_lowlevel.h> 
   27 #include <linux/limits.h> 
   31 #define FILE_NAME "write_me" 
   42 #define OPTION(t, p)                           \ 
   43     { t, offsetof(struct options, p), 1 } 
   44 static const struct fuse_opt option_spec[] = {
 
   45     OPTION(
"writeback_cache", writeback),
 
   46     OPTION(
"--data-size=%d", data_size),
 
   55     if(options.writeback) {
 
   61 static int tfs_stat(
fuse_ino_t ino, 
struct stat *stbuf) {
 
   64         stbuf->st_mode = S_IFDIR | 0755;
 
   68     else if (ino == FILE_INO) {
 
   69         stbuf->st_mode = S_IFREG | 0222;
 
   83     memset(&e, 0, 
sizeof(e));
 
   87     else if (strcmp(name, FILE_NAME) == 0)
 
   92     if (tfs_stat(e.ino, &e.attr) != 0)
 
  107     memset(&stbuf, 0, 
sizeof(stbuf));
 
  108     if (tfs_stat(ino, &stbuf) != 0)
 
  119         assert(ino == FILE_INO);
 
  126     (void) fi; (void) buf; (void) off;
 
  129     assert(ino == FILE_INO);
 
  130     expected = options.data_size;
 
  131     if(options.writeback)
 
  135         fprintf(stderr, 
"ERROR: Expected %zd bytes, got %zd\n!",
 
  144     .lookup     = tfs_lookup,
 
  145     .getattr    = tfs_getattr,
 
  150 static void* run_fs(
void *data) {
 
  151     struct fuse_session *se = (
struct fuse_session*) data;
 
  156 static void test_fs(
char *mountpoint) {
 
  157     char fname[PATH_MAX];
 
  159     size_t dsize = options.data_size;
 
  164     assert((fd = open(
"/dev/urandom", O_RDONLY)) != -1);
 
  165     assert(read(fd, buf, dsize) == dsize);
 
  168     assert(snprintf(fname, PATH_MAX, 
"%s/" FILE_NAME,
 
  170     fd = open(fname, O_WRONLY);
 
  176     assert(write(fd, buf, dsize) == dsize);
 
  177     assert(write(fd, buf, dsize) == dsize);
 
  182 int main(
int argc, 
char *argv[]) {
 
  184     struct fuse_session *se;
 
  194                           sizeof(tfs_oper), NULL);
 
  201     assert(pthread_create(&fs_thread, NULL, run_fs, (
void *)se) == 0);
 
  204     test_fs(fuse_opts.mountpoint);
 
  205     free(fuse_opts.mountpoint);
 
  210     assert(pthread_join(fs_thread, NULL) == 0);
 
  212     assert(got_write == 1);
 
  216     printf(
"Test completed successfully.\n");
 
int fuse_set_signal_handlers(struct fuse_session *se)
#define FUSE_CAP_WRITEBACK_CACHE
void fuse_remove_signal_handlers(struct fuse_session *se)
void fuse_session_destroy(struct fuse_session *se)
int fuse_reply_open(fuse_req_t req, const struct fuse_file_info *fi)
void fuse_session_exit(struct fuse_session *se)
int fuse_reply_err(fuse_req_t req, int err)
struct fuse_req * fuse_req_t
int fuse_session_loop(struct fuse_session *se)
int fuse_reply_entry(fuse_req_t req, const struct fuse_entry_param *e)
void fuse_session_unmount(struct fuse_session *se)
int fuse_parse_cmdline(struct fuse_args *args, struct fuse_cmdline_opts *opts)
struct fuse_session * fuse_session_new(struct fuse_args *args, const struct fuse_lowlevel_ops *op, size_t op_size, void *userdata)
int fuse_reply_write(fuse_req_t req, size_t count)
int fuse_session_mount(struct fuse_session *se, const char *mountpoint)
int fuse_reply_attr(fuse_req_t req, const struct stat *attr, double attr_timeout)
int fuse_opt_add_arg(struct fuse_args *args, const char *arg)
void fuse_opt_free_args(struct fuse_args *args)
int fuse_opt_parse(struct fuse_args *args, void *data, const struct fuse_opt opts[], fuse_opt_proc_t proc)
#define FUSE_ARGS_INIT(argc, argv)
void(* init)(void *userdata, struct fuse_conn_info *conn)