+getxattr() { # getxattr path name
+ # Return the base64 encoding of the value of xattr name on path.
+ local path=$1
+ local name=$2
+
+ # # getfattr --absolute-names --encoding=base64 --name=trusted.lov $path
+ # file: $path
+ # trusted.lov=0s0AvRCwEAAAAGAAAAAAAAAAAEAAACAAAAAAAQAAEAA...AAAAAAAAA=
+ #
+ # We print just 0s0AvRCwEAAAAGAAAAAAAAAAAEAAACAAAAAAAQAAEAA...AAAAAAAAA=
+
+ getfattr --absolute-names --encoding=base64 --name=$name $path |
+ awk -F= -v name=$name '$1 == name {
+ print substr($0, index($0, "=") + 1);
+ }'
+}
+
+test_102n() { # LU-4101 mdt: protect internal xattrs
+ local file0=$DIR/$tfile.0
+ local file1=$DIR/$tfile.1
+ local xattr0=$TMP/$tfile.0
+ local xattr1=$TMP/$tfile.1
+ local name
+ local value
+
+ if [ $(lustre_version_code $SINGLEMDS) -lt $(version_code 2.5.50) ]
+ then
+ skip "MDT < 2.5.50 allows setxattr on internal trusted xattrs"
+ return
+ fi
+
+ rm -rf $file0 $file1 $xattr0 $xattr1
+ touch $file0 $file1
+
+ # Get 'before' xattrs of $file1.
+ getfattr --absolute-names --dump --match=- $file1 > $xattr0
+
+ for name in lov lma lmv link fid version som hsm lfsck_namespace; do
+ # Try to copy xattr from $file0 to $file1.
+ value=$(getxattr $file0 trusted.$name 2> /dev/null)
+
+ setfattr --name=trusted.$name --value="$value" $file1 ||
+ error "setxattr 'trusted.$name' failed"
+
+ # Try to set a garbage xattr.
+ value=0sVGhlIHF1aWNrIGJyb3duIGZveCBqdW1wcyBvdmVyIGl0c2VsZi4=
+
+ setfattr --name=trusted.$name --value="$value" $file1 ||
+ error "setxattr 'trusted.$name' failed"
+
+ # Try to remove the xattr from $file1. We don't care if this
+ # appears to succeed or fail, we just don't want there to be
+ # any changes or crashes.
+ setfattr --remove=$trusted.$name $file1 2> /dev/null
+ done
+
+ # Get 'after' xattrs of file1.
+ getfattr --absolute-names --dump --match=- $file1 > $xattr1
+
+ if ! diff $xattr0 $xattr1; then
+ error "before and after xattrs of '$file1' differ"
+ fi
+
+ rm -rf $file0 $file1 $xattr0 $xattr1
+
+ return 0
+}
+run_test 102n "silently ignore setxattr on internal trusted xattrs"
+