LU-8667 osp: validate FID before initializing precreate seq

[fs/lustre-release.git] / lustre / ofd / ofd_internal.h

diff --git a/lustre/ofd/ofd_internal.h b/lustre/ofd/ofd_internal.h
index 9006726..f19ac04 100644 (file)
--- a/lustre/ofd/ofd_internal.h
+++ b/lustre/ofd/ofd_internal.h
@@ -569,4 +569,17 @@ static inline void ofd_prepare_fidea(struct filter_fid *ff,
        ff->ff_parent.f_ver = cpu_to_le32(oa->o_stripe_idx);
 }
 
+static inline int ofd_validate_seq(struct obd_export *exp, __u64 seq)
+{
+       struct filter_export_data *fed = &exp->exp_filter_data;
+
+       if (unlikely(seq == FID_SEQ_OST_MDT0 && fed->fed_group != 0)) {
+               /* IDIF request only operates on MDT0 group */
+               CERROR("%s: Invalid sequence %#llx for group %u\n",
+                      exp->exp_obd->obd_name, seq, fed->fed_group);
+               RETURN(-EINVAL);
+       }
+
+       return 0;
+}
 #endif /* _OFD_INTERNAL_H */