fuse: fix reads from files created using O_CREAT|O_RDWR

"create" hook doesn't have sys_creat semantics.
When user passed O_CREAT | O_RDWR as flags to open, we created write-only
file handle...

src/pmemfile-fuse/main.c

@@ -255,6 +255,17 @@ pmemfile_fuse_chown(const char *path, uid_t uid, gid_t gid)
  return 0;
 }
 
+static PMEMfile *
+pmemfile_open_wrapper(PMEMfilepool *pfp, const char *path, int flags,
+ pmemfile_mode_t mode)
+{
+ /*
+ * &~0x8000, because fuse passes flag pmemfile doesn't understand
+ * (O_LARGEFILE, which userspace on x86_64 defines as 0)
+ */
+ return pmemfile_open(pfp, path, flags & ~0x8000, mode);
+}
+
 static int
 pmemfile_fuse_create(const char *path, mode_t mode, struct fuse_file_info *fi)
 {
@@ -266,9 +277,9 @@ pmemfile_fuse_create(const char *path, mode_t mode, struct fuse_file_info *fi)
  if ((ret = update_ctx(pfp)) < 0)
  return ret;
 
- PMEMfile *f = pmemfile_create(pfp, path, mode);
+ PMEMfile *f = pmemfile_open_wrapper(pfp, path, fi->flags, mode);
  if (!f) {
- log("pmemfile_create %s failed: %d\n", path, errno);
+ log("pmemfile_open %s failed: %d\n", path, errno);
  return -errno;
  }
  fi->fh = (uintptr_t)f;
@@ -306,11 +317,7 @@ pmemfile_fuse_open(const char *path, struct fuse_file_info *fi)
  if ((ret = update_ctx(pfp)) < 0)
  return ret;
 
- /*
- * &~0x8000, because fuse passes flag pmemfile doesn't understand
- * (O_LARGEFILE, which userspace on x86_64 defines as 0)
- */
- PMEMfile *f = pmemfile_open(pfp, path, fi->flags & ~0x8000);
+ PMEMfile *f = pmemfile_open_wrapper(pfp, path, fi->flags, 0);
  if (f == NULL) {
  log("pmemfile_open %s failed: %d\n", path, errno);
  return -errno;