LU-12275 sec: enable client side encryption

[fs/lustre-release.git] / lustre / osd-zfs / osd_xattr.c

diff --git a/lustre/osd-zfs/osd_xattr.c b/lustre/osd-zfs/osd_xattr.c
index 91ed638..e50f23f 100644 (file)
--- a/lustre/osd-zfs/osd_xattr.c
+++ b/lustre/osd-zfs/osd_xattr.c
@@ -223,6 +223,46 @@ int osd_xattr_get_internal(const struct lu_env *env, struct osd_object *obj,
                                     buf, name, sizep);
 }
 
+/**
+ * Copy LMA extended attribute into provided buffer
+ *
+ * Note that no locking is done here.
+ *
+ * \param[in] env      execution environment
+ * \param[in] obj      object for which to retrieve xattr
+ * \param[out] buf     buffer to store xattr value in
+ *
+ * \retval 0           on success
+ * \retval negative    negated errno on failure
+ */
+int osd_xattr_get_lma(const struct lu_env *env, struct osd_object *obj,
+                     struct lu_buf *buf)
+{
+       int size = 0;
+       int rc = -ENOENT;
+
+       if (!buf)
+               return 0;
+
+       if (unlikely(obj->oo_destroyed))
+               goto out_lma;
+
+       /* check SA_ZPL_DXATTR first then fallback to directory xattr */
+       rc = __osd_sa_xattr_get(env, obj, buf, XATTR_NAME_LMA, &size);
+       if (!rc && unlikely(size < sizeof(struct lustre_mdt_attrs)))
+               rc = -EINVAL;
+       if (rc != -ENOENT)
+               goto out_lma;
+
+       rc = __osd_xattr_get_large(env, osd_obj2dev(obj), obj->oo_xattr,
+                                    buf, XATTR_NAME_LMA, &size);
+       if (!rc && unlikely(size < sizeof(struct lustre_mdt_attrs)))
+               rc = -EINVAL;
+
+out_lma:
+       return rc;
+}
+
 static int osd_get_pfid_from_lma(const struct lu_env *env,
                                 struct osd_object *obj,
                                 struct lu_buf *buf, int *sizep)