From 3edfe6f6a322df4de44332c45f9eb95ac7db1e51 Mon Sep 17 00:00:00 2001
From: Niu Yawei <yawei.niu@intel.com>
Date: Sun, 4 May 2014 23:41:42 -0400
Subject: [PATCH] LU-5005 utils: handle ROOT path correctly

MDT replies path '\0' to the request of fid2path on ROOT,
client utils should handle it properly.

Signed-off-by: Niu Yawei <yawei.niu@intel.com>
Change-Id: Ic7064866b0e8ef33fc0a17e273a120d6d6dae4fe
Reviewed-on: http://review.whamcloud.com/10211
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Fan Yong <fan.yong@intel.com>
Reviewed-by: Lai Siyao <lai.siyao@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>
---
 lustre/tests/lustre-rsync-test.sh | 43 +++++++++++++++++++++++++++++++++++++++
 lustre/utils/liblustreapi.c       | 10 ++++++---
 2 files changed, 50 insertions(+), 3 deletions(-)

diff --git a/lustre/tests/lustre-rsync-test.sh b/lustre/tests/lustre-rsync-test.sh
index 8717a8d..b091763 100644
--- a/lustre/tests/lustre-rsync-test.sh
+++ b/lustre/tests/lustre-rsync-test.sh
@@ -207,6 +207,49 @@ test_1() {
 }
 run_test 1 "Simple Replication"
 
+# Test 1a - test create/delete operations in ROOT directory
+test_1a() { # LU-5005
+	rm -rf $TGT/root-* 2> /dev/null
+	rm -rf $DIR/root-* 2> /dev/null
+	init_changelog
+
+	# Directory create
+	mkdir $DIR/root-dir
+
+	# File create
+	touch $DIR/root-file
+	touch $DIR/root-file2
+
+	# File rename
+	mv $DIR/root-file2 $DIR/root-file3
+
+	# File and directory delete
+	touch $DIR/root-file4
+	mkdir $DIR/root-dir1
+	rm $DIR/root-file4
+	rm -rf $DIR/root-dir1
+
+	# Replicate
+	local LRSYNC_LOG=$(generate_logname "lrsync_log")
+	echo "Replication"
+	$LRSYNC -s $DIR -t $TGT -m $MDT0 -u $CL_USER -l $LREPL_LOG \
+		-D $LRSYNC_LOG
+
+	# Verify
+	stat $TGT/root-dir || error "Dir create not replicated"
+	stat $TGT/root-file || error "File create not replicated"
+	stat $TGT/root-file2 && error "Rename not replicated (src)"
+	stat $TGT/root-file3 || error "Rename not replicated (tgt)"
+	stat $TGT/root-dir1 && error "Dir delete not replicated"
+	stat $TGT/root-file4 && error "File delete not replicated"
+
+	fini_changelog
+	rm -fr $TGT/root-*
+	rm -fr $DIR/root-*
+	return 0
+}
+run_test 1a "Replicate create/delete operations in ROOT directory"
+
 # Test 2a - Replicate files created by dbench
 test_2a() {
 	init_src
diff --git a/lustre/utils/liblustreapi.c b/lustre/utils/liblustreapi.c
index d3c99c6..e9d3b12 100644
--- a/lustre/utils/liblustreapi.c
+++ b/lustre/utils/liblustreapi.c
@@ -4283,9 +4283,13 @@ int llapi_fid2path(const char *device, const char *fidstr, char *buf,
                 if (rc != -ENOENT)
                         llapi_error(LLAPI_MSG_ERROR, rc, "ioctl err %d", rc);
         } else {
-                memcpy(buf, gf->gf_path, gf->gf_pathlen);
-                *recno = gf->gf_recno;
-                *linkno = gf->gf_linkno;
+		memcpy(buf, gf->gf_path, gf->gf_pathlen);
+		if (buf[0] == '\0') { /* ROOT path */
+			buf[0] = '/';
+			buf[1] = '\0';
+		}
+		*recno = gf->gf_recno;
+		*linkno = gf->gf_linkno;
         }
 
         free(gf);
-- 
1.8.3.1