+/** Bit-mask of valid attributes */
+/* The LA_* flags are written to disk as part of the ChangeLog records
+ * so they are part of the on-disk and network protocol, and cannot be changed.
+ * Only the first 12 bits are currently saved.
+ */
+enum la_valid {
+ LA_ATIME = 1 << 0,
+ LA_MTIME = 1 << 1,
+ LA_CTIME = 1 << 2,
+ LA_SIZE = 1 << 3,
+ LA_MODE = 1 << 4,
+ LA_UID = 1 << 5,
+ LA_GID = 1 << 6,
+ LA_BLOCKS = 1 << 7,
+ LA_TYPE = 1 << 8,
+ LA_FLAGS = 1 << 9,
+ LA_NLINK = 1 << 10,
+ LA_RDEV = 1 << 11,
+ LA_BLKSIZE = 1 << 12,
+ LA_KILL_SUID = 1 << 13,
+ LA_KILL_SGID = 1 << 14,
+ LA_PROJID = 1 << 15,
+ LA_LAYOUT_VERSION = 1 << 16,
+ LA_LSIZE = 1 << 17,
+ LA_LBLOCKS = 1 << 18,
+ /**
+ * Attributes must be transmitted to OST objects
+ */
+ LA_REMOTE_ATTR_SET = (LA_UID | LA_GID | LA_PROJID | LA_LAYOUT_VERSION)
+};
+
+#define MDS_FMODE_READ 00000001
+#define MDS_FMODE_WRITE 00000002
+
+#define MDS_FMODE_CLOSED 00000000
+#define MDS_FMODE_EXEC 00000004
+/* MDS_FMODE_EPOCH 01000000 obsolete since 2.8.0 */
+/* MDS_FMODE_TRUNC 02000000 obsolete since 2.8.0 */
+/* MDS_FMODE_SOM 04000000 obsolete since 2.8.0 */
+
+#define MDS_OPEN_CREATED 00000010
+#define MDS_OPEN_CROSS 00000020
+
+#define MDS_OPEN_CREAT 00000100
+#define MDS_OPEN_EXCL 00000200
+#define MDS_OPEN_TRUNC 00001000
+#define MDS_OPEN_APPEND 00002000
+#define MDS_OPEN_SYNC 00010000
+#define MDS_OPEN_DIRECTORY 00200000
+
+#define MDS_OPEN_BY_FID 040000000 /* open_by_fid for known object */
+#define MDS_OPEN_DELAY_CREATE 0100000000 /* delay initial object create */
+#define MDS_OPEN_OWNEROVERRIDE 0200000000 /* NFSD rw-reopen ro file for owner */
+#define MDS_OPEN_JOIN_FILE 0400000000 /* open for join file.
+ * We do not support JOIN FILE
+ * anymore, reserve this flags
+ * just for preventing such bit
+ * to be reused. */
+
+#define MDS_OPEN_LOCK 04000000000 /* This open requires open lock */
+#define MDS_OPEN_HAS_EA 010000000000 /* specify object create pattern */
+#define MDS_OPEN_HAS_OBJS 020000000000 /* Just set the EA the obj exist */
+#define MDS_OPEN_NORESTORE 0100000000000ULL /* Do not restore file at open */
+#define MDS_OPEN_NEWSTRIPE 0200000000000ULL /* New stripe needed (restripe or
+ * hsm restore) */
+#define MDS_OPEN_VOLATILE 0400000000000ULL /* File is volatile = created
+ unlinked */
+#define MDS_OPEN_LEASE 01000000000000ULL /* Open the file and grant lease
+ * delegation, succeed if it's not
+ * being opened with conflict mode.
+ */
+#define MDS_OPEN_RELEASE 02000000000000ULL /* Open the file for HSM release */
+
+#define MDS_OPEN_RESYNC 04000000000000ULL /* FLR: file resync */
+
+/* lustre internal open flags, which should not be set from user space */
+#define MDS_OPEN_FL_INTERNAL (MDS_OPEN_HAS_EA | MDS_OPEN_HAS_OBJS | \
+ MDS_OPEN_OWNEROVERRIDE | MDS_OPEN_LOCK | \
+ MDS_OPEN_BY_FID | MDS_OPEN_LEASE | \
+ MDS_OPEN_RELEASE | MDS_OPEN_RESYNC)
+