LU-1337 llite: kernel 3.1 changes open_to_namei_flags

[fs/lustre-release.git] / lustre / include / linux / lustre_compat25.h

diff --git a/lustre/include/linux/lustre_compat25.h b/lustre/include/linux/lustre_compat25.h
index 9362d9f..6670041 100644 (file)
--- a/lustre/include/linux/lustre_compat25.h
+++ b/lustre/include/linux/lustre_compat25.h
@@ -691,4 +691,19 @@ static inline bool selinux_is_enabled(void)
 # define lm_compare_owner      fl_compare_owner
 #endif
 
+/*
+ * After 3.1, kernel's nameidata.intent.open.flags is different
+ * with lustre's lookup_intent.it_flags, as lustre's it_flags'
+ * lower bits equal to FMODE_xxx while kernel doesn't transliterate
+ * lower bits of nameidata.intent.open.flags to FMODE_xxx.
+ * */
+#include <linux/version.h>
+static inline int ll_namei_to_lookup_intent_flag(int flag)
+{
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 1, 0)
+       flag = (flag & ~O_ACCMODE) | OPEN_FMODE(flag);
+#endif
+       return flag;
+}
+
 #endif /* _COMPAT25_H */