LU-8998 pfl: enhance PFID EA for PFL

[fs/lustre-release.git] / lustre / obdclass / md_attrs.c

diff --git a/lustre/obdclass/md_attrs.c b/lustre/obdclass/md_attrs.c
index 979c52d..8500393 100644 (file)
--- a/lustre/obdclass/md_attrs.c
+++ b/lustre/obdclass/md_attrs.c
@@ -53,7 +53,7 @@ void lustre_lma_init(struct lustre_mdt_attrs *lma, const struct lu_fid *fid,
        LASSERT(sizeof(*lma) ==
                (offsetof(struct lustre_mdt_attrs, lma_self_fid) +
                 sizeof(lma->lma_self_fid)));
-};
+}
 EXPORT_SYMBOL(lustre_lma_init);
 
 /**
@@ -68,9 +68,52 @@ void lustre_lma_swab(struct lustre_mdt_attrs *lma)
        __swab32s(&lma->lma_incompat);
        lustre_swab_lu_fid(&lma->lma_self_fid);
 #endif
-};
+}
 EXPORT_SYMBOL(lustre_lma_swab);
 
+void lustre_loa_init(struct lustre_ost_attrs *loa, const struct lu_fid *fid,
+                    __u32 compat, __u32 incompat)
+{
+       CLASSERT(sizeof(*loa) == LMA_OLD_SIZE);
+
+       memset(&loa->loa_parent_fid, 0,
+              sizeof(*loa) - offsetof(typeof(*loa), loa_parent_fid));
+       lustre_lma_init(&loa->loa_lma, fid, compat, incompat);
+}
+EXPORT_SYMBOL(lustre_loa_init);
+
+/**
+ * Swab, if needed, LOA (for OST-object only) structure with LMA EA and PFID EA
+ * combined together are stored on-disk in little-endian order.
+ *
+ * \param[in] loa      - the pointer to the LOA structure to be swabbed.
+ * \param[in] to_cpu   - to indicate swab for CPU order or not.
+ */
+void lustre_loa_swab(struct lustre_ost_attrs *loa, bool to_cpu)
+{
+       struct lustre_mdt_attrs *lma = &loa->loa_lma;
+#ifdef __BIG_ENDIAN
+       __u32 compat = lma->lma_compat;
+#endif
+
+       lustre_lma_swab(lma);
+#ifdef __BIG_ENDIAN
+       if (to_cpu)
+               compat = lma->lma_compat;
+
+       if (compat & LMAC_STRIPE_INFO) {
+               lustre_swab_lu_fid(&loa->loa_parent_fid);
+               __swab32s(&loa->loa_stripe_size);
+       }
+       if (compat & LMAC_COMP_INFO) {
+               __swab32s(&loa->loa_comp_id);
+               __swab64s(&loa->loa_comp_start);
+               __swab64s(&loa->loa_comp_end);
+       }
+#endif
+}
+EXPORT_SYMBOL(lustre_loa_swab);
+
 /**
  * Swab, if needed, HSM structure which is stored on-disk in little-endian
  * order.
@@ -85,7 +128,7 @@ void lustre_hsm_swab(struct hsm_attrs *attrs)
        __swab64s(&attrs->hsm_arch_id);
        __swab64s(&attrs->hsm_arch_ver);
 #endif
-};
+}
 
 /*
  * Swab and extract HSM attributes from on-disk xattr.