+
+int mdt_pack_secctx_in_reply(struct mdt_thread_info *info,
+ struct mdt_object *child)
+{
+ char *secctx_name;
+ struct lu_buf *buffer;
+ struct mdt_body *repbody;
+ struct req_capsule *pill = info->mti_pill;
+ int rc = 0;
+
+ if (req_capsule_has_field(pill, &RMF_FILE_SECCTX, RCL_SERVER) &&
+ req_capsule_get_size(pill, &RMF_FILE_SECCTX, RCL_SERVER) != 0) {
+ secctx_name =
+ req_capsule_client_get(pill, &RMF_FILE_SECCTX_NAME);
+ buffer = &info->mti_buf;
+
+ /* fill reply buffer with security context now */
+ buffer->lb_len = req_capsule_get_size(pill, &RMF_FILE_SECCTX,
+ RCL_SERVER);
+ buffer->lb_buf = req_capsule_server_get(info->mti_pill,
+ &RMF_FILE_SECCTX);
+ rc = mo_xattr_get(info->mti_env, mdt_object_child(child),
+ buffer, secctx_name);
+ if (rc >= 0) {
+ CDEBUG(D_SEC,
+ "found security context of size %d for "DFID"\n",
+ rc, PFID(mdt_object_fid(child)));
+
+ repbody = req_capsule_server_get(pill, &RMF_MDT_BODY);
+ repbody->mbo_valid |= OBD_MD_SECCTX;
+ if (rc < buffer->lb_len)
+ req_capsule_shrink(pill, &RMF_FILE_SECCTX, rc,
+ RCL_SERVER);
+ rc = 0;
+ } else {
+ CDEBUG(D_SEC,
+ "security context not found for "DFID": rc = %d\n",
+ PFID(mdt_object_fid(child)), rc);
+ req_capsule_shrink(pill, &RMF_FILE_SECCTX, 0,
+ RCL_SERVER);
+ /* handling -ENOENT is important because it may change
+ * object state in DNE env dropping LOHA_EXISTS flag,
+ * it is important to return that to the caller.
+ * Check LU-13115 for details.
+ */
+ if (rc != -ENOENT)
+ rc = 0;
+ }
+ }
+ return rc;
+}
+
+/* check whether two FIDs belong to different MDT. */
+static int mdt_fids_different_target(struct mdt_thread_info *info,
+ const struct lu_fid *fid1,
+ const struct lu_fid *fid2)
+{
+ const struct lu_env *env = info->mti_env;
+ struct mdt_device *mdt = info->mti_mdt;
+ struct lu_seq_range *range = &info->mti_range;
+ struct seq_server_site *ss;
+ __u32 index1, index2;
+ int rc;
+
+ if (fid_seq(fid1) == fid_seq(fid2))
+ return 0;
+
+ ss = mdt->mdt_lu_dev.ld_site->ld_seq_site;
+
+ range->lsr_flags = LU_SEQ_RANGE_MDT;
+ rc = fld_server_lookup(env, ss->ss_server_fld, fid1->f_seq, range);
+ if (rc)
+ return rc;
+
+ index1 = range->lsr_index;
+
+ rc = fld_server_lookup(env, ss->ss_server_fld, fid2->f_seq, range);
+ if (rc)
+ return rc;
+
+ index2 = range->lsr_index;
+
+ return index1 != index2;
+}
+
+/**
+ * Check whether \a child is remote object on \a parent.
+ *
+ * \param[in] info thread environment
+ * \param[in] parent parent object, it's the same as child object in
+ * getattr_by_fid
+ * \param[in] child child object
+ *
+ * \retval 1 is remote object.
+ * \retval 0 isn't remote object.
+ * \retval < 1 error code
+ */
+int mdt_is_remote_object(struct mdt_thread_info *info,
+ struct mdt_object *parent,
+ struct mdt_object *child)
+{
+ struct lu_buf *buf = &info->mti_big_buf;
+ struct linkea_data ldata = { NULL };
+ struct link_ea_header *leh;
+ struct link_ea_entry *lee;
+ struct lu_name name;
+ struct lu_fid pfid;
+ int reclen;
+ int i;
+ int rc;
+
+ ENTRY;
+
+ if (fid_is_root(mdt_object_fid(child)))
+ RETURN(0);
+
+ if (likely(parent != child)) {
+ if (mdt_object_remote(parent) ^ mdt_object_remote(child))
+ RETURN(1);
+
+ if (!mdt_object_remote(parent) && !mdt_object_remote(child))
+ RETURN(0);
+
+ rc = mdt_fids_different_target(info, mdt_object_fid(parent),
+ mdt_object_fid(child));
+ RETURN(rc);
+ }
+
+ /* client < 2.13.52 getattr_by_fid parent and child are the same */
+ buf = lu_buf_check_and_alloc(buf, PATH_MAX);
+ if (!buf->lb_buf)
+ RETURN(-ENOMEM);
+
+ ldata.ld_buf = buf;
+ rc = mdt_links_read(info, child, &ldata);
+ /* can't read linkea, just assume it's remote object */
+ if (rc == -ENOENT || rc == -ENODATA)
+ RETURN(1);
+ if (rc)
+ RETURN(rc);
+
+ leh = buf->lb_buf;
+ lee = (struct link_ea_entry *)(leh + 1);
+ for (i = 0; i < leh->leh_reccount; i++) {
+ linkea_entry_unpack(lee, &reclen, &name, &pfid);
+ lee = (struct link_ea_entry *) ((char *)lee + reclen);
+ if (mdt_fids_different_target(info, &pfid,
+ mdt_object_fid(child)))
+ RETURN(1);
+ }
+
+ RETURN(0);
+}
+
+int mdt_pack_encctx_in_reply(struct mdt_thread_info *info,
+ struct mdt_object *child)
+{
+ struct lu_buf *buffer;
+ struct mdt_body *repbody;
+ struct req_capsule *pill = info->mti_pill;
+ struct obd_export *exp = mdt_info_req(info)->rq_export;
+ int rc = 0;
+
+ if (!exp_connect_encrypt(exp))
+ return rc;
+
+ if (req_capsule_has_field(pill, &RMF_FILE_ENCCTX, RCL_SERVER) &&
+ req_capsule_get_size(pill, &RMF_FILE_ENCCTX, RCL_SERVER) != 0) {
+ struct lu_attr la = { 0 };
+ struct dt_object *dt = mdt_obj2dt(child);
+
+ if (dt && dt->do_ops && dt->do_ops->do_attr_get)
+ dt_attr_get(info->mti_env, mdt_obj2dt(child), &la);
+
+ if (la.la_valid & LA_FLAGS && la.la_flags & LUSTRE_ENCRYPT_FL) {
+ buffer = &info->mti_buf;
+
+ /* fill reply buffer with encryption context now */
+ buffer->lb_len =
+ req_capsule_get_size(pill, &RMF_FILE_ENCCTX,
+ RCL_SERVER);
+ buffer->lb_buf =
+ req_capsule_server_get(pill, &RMF_FILE_ENCCTX);
+ rc = mo_xattr_get(info->mti_env,
+ mdt_object_child(child),
+ buffer,
+ LL_XATTR_NAME_ENCRYPTION_CONTEXT);
+ if (rc >= 0) {
+ CDEBUG(D_SEC,
+ "found encryption ctx of size %d for "DFID"\n",
+ rc, PFID(mdt_object_fid(child)));
+
+ repbody = req_capsule_server_get(pill,
+ &RMF_MDT_BODY);
+ repbody->mbo_valid |= OBD_MD_ENCCTX;
+ if (rc < buffer->lb_len)
+ req_capsule_shrink(pill,
+ &RMF_FILE_ENCCTX, rc,
+ RCL_SERVER);
+ rc = 0;
+ } else {
+ CDEBUG(D_SEC,
+ "encryption ctx not found for "DFID": rc = %d\n",
+ PFID(mdt_object_fid(child)), rc);
+ req_capsule_shrink(pill, &RMF_FILE_ENCCTX, 0,
+ RCL_SERVER);
+ /* handling -ENOENT is important because it may
+ * change object state in DNE env dropping
+ * LOHA_EXISTS flag, it is important to return
+ * that to the caller.
+ * Check LU-13115 for details.
+ */
+ if (rc != -ENOENT)
+ rc = 0;
+ }
+ } else {
+ req_capsule_shrink(pill, &RMF_FILE_ENCCTX, 0,
+ RCL_SERVER);
+ }
+ }
+ return rc;
+}