+struct dotl_openflag_map {
+ int open_flag;
+ int dotl_flag;
+};
+
+static int v9fs_mapped_dotl_flags(int flags)
+{
+ int i;
+ int rflags = 0;
+ struct dotl_openflag_map dotl_oflag_map[] = {
+ { O_CREAT, P9_DOTL_CREATE },
+ { O_EXCL, P9_DOTL_EXCL },
+ { O_NOCTTY, P9_DOTL_NOCTTY },
+ { O_TRUNC, P9_DOTL_TRUNC },
+ { O_APPEND, P9_DOTL_APPEND },
+ { O_NONBLOCK, P9_DOTL_NONBLOCK },
+ { O_DSYNC, P9_DOTL_DSYNC },
+ { FASYNC, P9_DOTL_FASYNC },
+ { O_DIRECT, P9_DOTL_DIRECT },
+ { O_LARGEFILE, P9_DOTL_LARGEFILE },
+ { O_DIRECTORY, P9_DOTL_DIRECTORY },
+ { O_NOFOLLOW, P9_DOTL_NOFOLLOW },
+ { O_NOATIME, P9_DOTL_NOATIME },
+ { O_CLOEXEC, P9_DOTL_CLOEXEC },
+ { O_SYNC, P9_DOTL_SYNC},
+ };
+ for (i = 0; i < ARRAY_SIZE(dotl_oflag_map); i++) {
+ if (flags & dotl_oflag_map[i].open_flag)
+ rflags |= dotl_oflag_map[i].dotl_flag;
+ }
+ return rflags;
+}
+
+/**
+ * v9fs_open_to_dotl_flags- convert Linux specific open flags to
+ * plan 9 open flag.
+ * @flags: flags to convert
+ */
+int v9fs_open_to_dotl_flags(int flags)
+{
+ int rflags = 0;
+
+ /*
+ * We have same bits for P9_DOTL_READONLY, P9_DOTL_WRONLY
+ * and P9_DOTL_NOACCESS
+ */
+ rflags |= flags & O_ACCMODE;
+ rflags |= v9fs_mapped_dotl_flags(flags);
+
+ return rflags;
+}
+