X-Git-Url: https://git.whamcloud.com/?p=fs%2Flustre-release.git;a=blobdiff_plain;f=lustre%2Finclude%2Flustre_fid.h;h=7721273c04f3bf34429cdc30d89923b78f908d2b;hp=ee4c3c6ec44480faa3bce6b5e1ec32fd06e4d4f8;hb=6c4c51e3079e6c257fbf86536e4739110c166e3b;hpb=c3f22bfae4ca23664959996a7d154f311f694271

diff --git a/lustre/include/lustre_fid.h b/lustre/include/lustre_fid.h
index ee4c3c6..7721273 100644
--- a/lustre/include/lustre_fid.h
+++ b/lustre/include/lustre_fid.h
@@ -428,7 +428,6 @@ int seq_client_alloc_fid(const struct lu_env *env, struct lu_client_seq *seq,
                          struct lu_fid *fid);
 int seq_client_get_seq(const struct lu_env *env, struct lu_client_seq *seq,
                        seqno_t *seqnr);
-
 int seq_site_fini(const struct lu_env *env, struct seq_server_site *ss);
 /* Fids common stuff */
 int fid_is_local(const struct lu_env *env,
@@ -582,6 +581,18 @@ static inline __u32 fid_flatten32(const struct lu_fid *fid)
         RETURN(ino ? ino : fid_oid(fid));
 }
 
+static inline int lu_fid_diff(struct lu_fid *fid1, struct lu_fid *fid2)
+{
+	LASSERTF(fid_seq(fid1) == fid_seq(fid2), "fid1:"DFID", fid2:"DFID"\n",
+		 PFID(fid1), PFID(fid2));
+
+	if (fid_is_idif(fid1) && fid_is_idif(fid2))
+		return fid_idif_id(fid1->f_seq, fid1->f_oid, fid1->f_ver) -
+		       fid_idif_id(fid2->f_seq, fid2->f_oid, fid2->f_ver);
+
+	return fid_oid(fid1) - fid_oid(fid2);
+}
+
 #define LUSTRE_SEQ_SRV_NAME "seq_srv"
 #define LUSTRE_SEQ_CTL_NAME "seq_ctl"