LU-2240 mds: Assign special fid sequence to root.

[fs/lustre-release.git] / lustre / include / lustre / lustre_idl.h

diff --git a/lustre/include/lustre/lustre_idl.h b/lustre/include/lustre/lustre_idl.h
index 0b2adb4..9330f95 100644 (file)
--- a/lustre/include/lustre/lustre_idl.h
+++ b/lustre/include/lustre/lustre_idl.h
@@ -399,29 +399,34 @@ static inline obd_id fid_ver_oid(const struct lu_fid *fid)
  * http://arch.lustre.org/index.php?title=Interoperability_fids_zfs#NEW.0
  */
 enum fid_seq {
-        FID_SEQ_OST_MDT0   = 0,
-        FID_SEQ_LLOG       = 1,
-        FID_SEQ_ECHO       = 2,
-        FID_SEQ_OST_MDT1   = 3,
-        FID_SEQ_OST_MAX    = 9, /* Max MDT count before OST_on_FID */
-        FID_SEQ_RSVD       = 11,
-        FID_SEQ_IGIF       = 12,
-        FID_SEQ_IGIF_MAX   = 0x0ffffffffULL,
-        FID_SEQ_IDIF       = 0x100000000ULL,
-        FID_SEQ_IDIF_MAX   = 0x1ffffffffULL,
-        /* Normal FID sequence starts from this value, i.e. 1<<33 */
-        FID_SEQ_START      = 0x200000000ULL,
+       FID_SEQ_OST_MDT0        = 0,
+       FID_SEQ_LLOG            = 1,
+       FID_SEQ_ECHO            = 2,
+       FID_SEQ_OST_MDT1        = 3,
+       FID_SEQ_OST_MAX         = 9, /* Max MDT count before OST_on_FID */
+       FID_SEQ_RSVD            = 11,
+       FID_SEQ_IGIF            = 12,
+       FID_SEQ_IGIF_MAX        = 0x0ffffffffULL,
+       FID_SEQ_IDIF            = 0x100000000ULL,
+       FID_SEQ_IDIF_MAX        = 0x1ffffffffULL,
+       /* Normal FID sequence starts from this value, i.e. 1<<33 */
+       FID_SEQ_START           = 0x200000000ULL,
        /* sequence for local pre-defined FIDs listed in local_oid */
-        FID_SEQ_LOCAL_FILE = 0x200000001ULL,
-        FID_SEQ_DOT_LUSTRE = 0x200000002ULL,
+       FID_SEQ_LOCAL_FILE      = 0x200000001ULL,
+       FID_SEQ_DOT_LUSTRE      = 0x200000002ULL,
        /* sequence is used for local named objects FIDs generated
         * by local_object_storage library */
-       FID_SEQ_LOCAL_NAME = 0x200000003ULL,
-        FID_SEQ_SPECIAL    = 0x200000004ULL,
-        FID_SEQ_QUOTA      = 0x200000005ULL,
-        FID_SEQ_QUOTA_GLB  = 0x200000006ULL,
-        FID_SEQ_NORMAL     = 0x200000400ULL,
-        FID_SEQ_LOV_DEFAULT= 0xffffffffffffffffULL
+       FID_SEQ_LOCAL_NAME      = 0x200000003ULL,
+       /* Because current FLD will only cache the fid sequence, instead
+        * of oid on the client side, if the FID needs to be exposed to
+        * clients sides, it needs to make sure all of fids under one
+        * sequence will be located in one MDT. */
+       FID_SEQ_SPECIAL         = 0x200000004ULL,
+       FID_SEQ_QUOTA           = 0x200000005ULL,
+       FID_SEQ_QUOTA_GLB       = 0x200000006ULL,
+       FID_SEQ_ROOT            = 0x200000007ULL,  /* Located on MDT0 */
+       FID_SEQ_NORMAL          = 0x200000400ULL,
+       FID_SEQ_LOV_DEFAULT     = 0xffffffffffffffffULL
 };
 
 #define OBIF_OID_MAX_BITS           32
@@ -478,11 +483,28 @@ static inline int fid_seq_is_rsvd(const __u64 seq)
         return (seq > FID_SEQ_OST_MDT0 && seq <= FID_SEQ_RSVD);
 };
 
+static inline int fid_seq_is_special(const __u64 seq)
+{
+       return seq == FID_SEQ_SPECIAL;
+};
+
+static inline int fid_seq_is_local_file(const __u64 seq)
+{
+       return seq == FID_SEQ_LOCAL_FILE;
+};
+
 static inline int fid_is_mdt0(const struct lu_fid *fid)
 {
         return fid_seq_is_mdt0(fid_seq(fid));
 }
 
+static inline void lu_root_fid(struct lu_fid *fid)
+{
+       fid->f_seq = FID_SEQ_ROOT;
+       fid->f_oid = 1;
+       fid->f_ver = 0;
+}
+
 /**
  * Check if a fid is igif or not.
  * \param fid the fid to be tested.
@@ -518,6 +540,11 @@ struct ost_id {
         obd_seq                oi_seq;
 };
 
+static inline int fid_is_local_file(const struct lu_fid *fid)
+{
+       return fid_seq_is_local_file(fid_seq(fid));
+}
+
 static inline int fid_seq_is_norm(const __u64 seq)
 {
         return (seq >= FID_SEQ_NORMAL);
@@ -1870,6 +1897,7 @@ typedef enum {
        MDS_HSM_REQUEST         = 58,
        MDS_HSM_CT_REGISTER     = 59,
        MDS_HSM_CT_UNREGISTER   = 60,
+       MDS_SWAP_LAYOUTS        = 61,
        MDS_LAST_OPC
 } mds_cmd_t;
 
@@ -3444,5 +3472,14 @@ struct update_reply {
 void lustre_swab_update_buf(struct update_buf *ub);
 void lustre_swab_update_reply_buf(struct update_reply *ur);
 
+/** layout swap request structure
+ * fid1 and fid2 are in mdt_body
+ */
+struct mdc_swap_layouts {
+       __u64           msl_flags;
+} __packed;
+
+void lustre_swab_swap_layouts(struct mdc_swap_layouts *msl);
+
 #endif
 /** @} lustreidl */