LU-13437 llite: pack parent FID in getattr

Pack parent FID in getattr request if OBD_CONNECT2_GETATTR_PFID is
enabled, otherwise fill it with target FID for backward compatibility.

Lustre-change: https://review.whamcloud.com/39290
Lustre-commit: 5f2c44bf

Fixes: f9a2da63

 ("LU-13437 mdt: don't fetch LOOKUP lock for remot...")
Signed-off-by: Lai Siyao <lai.siyao@whamcloud.com>
Reviewed-by: Neil Brown <neilb@suse.de>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>
Change-Id: I91bace23e67b548feb92fd885fb5e64e92c96408
Reviewed-on: https://review.whamcloud.com/39771

Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>

lustre/include/uapi/linux/lustre/lustre_idl.h

@@ -893,7 +893,8 @@ struct ptlrpc_body_v2 {
 				OBD_CONNECT2_ARCHIVE_ID_ARRAY | \
 				OBD_CONNECT2_SELINUX_POLICY | \
 				OBD_CONNECT2_LSOM | \
-				OBD_CONNECT2_ASYNC_DISCARD)
+				OBD_CONNECT2_ASYNC_DISCARD | \
+				OBD_CONNECT2_GETATTR_PFID)
 
 #define OST_CONNECT_SUPPORTED  (OBD_CONNECT_SRVLOCK | OBD_CONNECT_GRANT | \
 				OBD_CONNECT_REQPORTAL | OBD_CONNECT_VERSION | \

lustre/llite/file.c

@@ -4346,6 +4346,7 @@ static int ll_inode_revalidate_fini(struct inode *inode, int rc)
 
 static int ll_inode_revalidate(struct dentry *dentry, enum ldlm_intent_flags op)
 {
+	struct inode *parent;
 	struct inode *inode = dentry->d_inode;
 	struct obd_export *exp = ll_i2mdexp(inode);
 	struct lookup_intent oit = {
@@ -4359,9 +4360,14 @@ static int ll_inode_revalidate(struct dentry *dentry, enum ldlm_intent_flags op)
 	CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p),name=%s\n",
 	       PFID(ll_inode2fid(inode)), inode, dentry->d_name.name);
 
+	if (exp_connect_flags2(exp) & OBD_CONNECT2_GETATTR_PFID)
+		parent = dentry->d_parent->d_inode;
+	else
+		parent = inode;
+
 	/* Call getattr by fid, so do not provide name at all. */
-	op_data = ll_prep_md_op_data(NULL, dentry->d_parent->d_inode, inode,
-				     NULL, 0, 0, LUSTRE_OPC_ANY, NULL);
+	op_data = ll_prep_md_op_data(NULL, parent, inode, NULL, 0, 0,
+				     LUSTRE_OPC_ANY, NULL);
 	if (IS_ERR(op_data))
 		RETURN(PTR_ERR(op_data));
 

lustre/llite/llite_lib.c

@@ -228,7 +228,8 @@ static int client_common_fill_super(struct super_block *sb, char *md, char *dt,
 				   OBD_CONNECT2_SUM_STATFS |
 				   OBD_CONNECT2_ARCHIVE_ID_ARRAY |
 				   OBD_CONNECT2_LSOM |
-				   OBD_CONNECT2_ASYNC_DISCARD;
+				   OBD_CONNECT2_ASYNC_DISCARD |
+				   OBD_CONNECT2_GETATTR_PFID;
 
 #ifdef HAVE_LRU_RESIZE_SUPPORT
         if (sbi->ll_flags & LL_SBI_LRU_RESIZE)

lustre/lmv/lmv_intent.c

@@ -188,7 +188,10 @@ int lmv_revalidate_slaves(struct obd_export *exp,
 		 * which is not needed here.
 		 */
 		memset(op_data, 0, sizeof(*op_data));
-		op_data->op_fid1 = *pfid;
+		if (exp_connect_flags2(exp) & OBD_CONNECT2_GETATTR_PFID)
+			op_data->op_fid1 = *pfid;
+		else
+			op_data->op_fid1 = fid;
 		op_data->op_fid2 = fid;
 
 		tgt = lmv_get_target(lmv, lsm->lsm_md_oinfo[i].lmo_mds, NULL);