+# Data-on-MDT tests
+test_100a() {
+ skip "Reserved for glimpse-ahead" && return
+ [ $(lustre_version_code $SINGLEMDS) -lt $(version_code 2.10.55) ] &&
+ skip "Need MDS version at least 2.10.55" && return
+
+ mkdir -p $DIR/$tdir
+
+ $LFS setstripe -E 1024K -L mdt -E EOF $DIR/$tdir/dom
+
+ lctl set_param -n mdc.*.stats=clear
+ dd if=/dev/zero of=$DIR2/$tdir/dom bs=4096 count=1 || return 1
+
+ $CHECKSTAT -t file -s 4096 $DIR/$tdir/dom || error "stat #1"
+ # first stat from server should return size data and save glimpse
+ local gls=$(lctl get_param -n mdc.*.stats | grep -c ldlm_glimpse)
+ [ $gls -eq 0 ] || error "Unexpected $gls glimpse RPCs"
+ # second stat to check size is NOT cached on client without IO lock
+ $CHECKSTAT -t file -s 4096 $DIR/$tdir/dom || error "stat #2"
+
+ local gls=$(lctl get_param -n mdc.*.stats | grep -c ldlm_glimpse)
+ [ $gls -ge 1 ] || error "Expect glimpse RPCs but none"
+ rm -f $dom
+}
+run_test 100a "DoM: glimpse RPCs for stat without IO lock (DoM only file)"
+
+test_100b() {
+ [ $(lustre_version_code $SINGLEMDS) -lt $(version_code 2.10.55) ] &&
+ skip "Need MDS version at least 2.10.55" && return
+
+ mkdir -p $DIR/$tdir
+
+ $LFS setstripe -E 1024K -L mdt -E EOF $DIR/$tdir/dom
+
+ lctl set_param -n mdc.*.stats=clear
+ dd if=/dev/zero of=$DIR2/$tdir/dom bs=4096 count=1 || return 1
+ cancel_lru_locks mdc
+ # first stat data from server should have size
+ $CHECKSTAT -t file -s 4096 $DIR/$tdir/dom || error "stat #1"
+ # second stat to check size is cached on client
+ $CHECKSTAT -t file -s 4096 $DIR/$tdir/dom || error "stat #2"
+
+ local gls=$(lctl get_param -n mdc.*.stats | grep -c ldlm_glimpse)
+ # both stats should cause no glimpse requests
+ [ $gls == 0 ] || error "Unexpected $gls glimpse RPCs"
+ rm -f $dom
+}
+run_test 100b "DoM: no glimpse RPC for stat with IO lock (DoM only file)"
+
+test_100c() {
+ [ $(lustre_version_code $SINGLEMDS) -lt $(version_code 2.10.55) ] &&
+ skip "Need MDS version at least 2.10.55" && return
+
+ mkdir -p $DIR/$tdir
+
+ $LFS setstripe -E 1024K -L mdt -E EOF $DIR/$tdir/dom
+
+ lctl set_param -n mdc.*.stats=clear
+ lctl set_param -n osc.*.stats=clear
+ dd if=/dev/zero of=$DIR2/$tdir/dom bs=2048K count=1 || return 1
+
+ # check that size is merged from MDT and OST correctly
+ $CHECKSTAT -t file -s 2097152 $DIR/$tdir/dom ||
+ error "Wrong size from stat #1"
+
+ local gls=$(lctl get_param -n osc.*.stats | grep -c ldlm_glimpse)
+ [ $gls -eq 0 ] && error "Expect OST glimpse RPCs but got none"
+
+ rm -f $dom
+}
+run_test 100c "DoM: write vs stat without IO lock (combined file)"
+
+test_100d() {
+ [ $(lustre_version_code $SINGLEMDS) -lt $(version_code 2.10.55) ] &&
+ skip "Need MDS version at least 2.10.55" && return
+
+ mkdir -p $DIR/$tdir
+
+ $LFS setstripe -E 1024K -L mdt -E EOF $DIR/$tdir/dom
+
+
+ dd if=/dev/zero of=$DIR2/$tdir/dom bs=2048K count=1 || return 1
+ lctl set_param -n mdc.*.stats=clear
+ $TRUNCATE $DIR2/$tdir/dom 4096
+
+ # check that reported size is valid after file grows to OST and
+ # is truncated back to MDT stripe size
+ $CHECKSTAT -t file -s 4096 $DIR/$tdir/dom ||
+ error "Wrong size from stat #1"
+
+ local gls=$(lctl get_param -n osc.*.stats | grep -c ldlm_glimpse)
+ [ $gls -eq 0 ] && error "Expect OST glimpse but got none"
+
+ rm -f $dom
+}
+run_test 100d "DoM: write+truncate vs stat without IO lock (combined file)"
+
+test_101a() {
+ [ $(lustre_version_code $SINGLEMDS) -lt $(version_code 2.10.55) ] &&
+ skip "Need MDS version at least 2.10.55" && return
+
+ $LFS setstripe -E 1024K -L mdt -E EOF $DIR1/$tfile
+ # to get layout
+ $CHECKSTAT -t file $DIR1/$tfile
+
+ local old_wb=$(sysctl -n vm.dirty_writeback_centisecs)
+ sysctl -wq vm.dirty_writeback_centisecs=0
+
+ trap "sysctl -wq vm.dirty_writeback_centisecs=$old_wb" EXIT
+
+ # open + IO lock
+ dd if=/dev/zero of=$DIR1/$tfile bs=4096 count=1 ||
+ error_noexit "Write fails"
+ # must discard pages
+ lctl set_param -n mdc.*.stats=clear
+ rm $DIR2/$tfile || error "Unlink fails"
+
+ local writes=$(lctl get_param -n mdc.*.stats | grep -c ost_write)
+ [ $writes -eq 0 ] || error "Found WRITE RPC but expect none"
+}
+run_test 101a "Discard DoM data on unlink"
+
+test_101b() {
+ [ $(lustre_version_code $SINGLEMDS) -lt $(version_code 2.10.55) ] &&
+ skip "Need MDS version at least 2.10.55" && return
+
+ $LFS setstripe -E 1024K -L mdt -E EOF $DIR1/$tfile
+ touch $DIR1/${tfile}_2
+ # to get layout
+ $CHECKSTAT -t file $DIR1/$tfile
+
+ local old_wb=$(sysctl -n vm.dirty_writeback_centisecs)
+ sysctl -wq vm.dirty_writeback_centisecs=0
+
+ trap "sysctl -wq vm.dirty_writeback_centisecs=$old_wb" EXIT
+
+ # open + IO lock
+ dd if=/dev/zero of=$DIR1/$tfile bs=4096 count=1 || error "Write fails"
+ # must discard pages
+ lctl set_param -n mdc.*.stats=clear
+ mv $DIR2/${tfile}_2 $DIR2/$tfile || error "Rename fails"
+
+ local writes=$(lctl get_param -n mdc.*.stats | grep -c ost_write)
+ [ $writes -eq 0 ] || error "Found WRITE RPC but expect none"
+}
+run_test 101b "Discard DoM data on rename"
+
+test_101c() {
+ [ $(lustre_version_code $SINGLEMDS) -lt $(version_code 2.10.55) ] &&
+ skip "Need MDS version at least 2.10.55" && return
+
+ $LFS setstripe -E 1024K -L mdt -E EOF $DIR1/$tfile
+ # to get layout
+ $CHECKSTAT -t file $DIR1/$tfile
+
+ local old_wb=$(sysctl -n vm.dirty_writeback_centisecs)
+ sysctl -wq vm.dirty_writeback_centisecs=0
+
+ trap "sysctl -wq vm.dirty_writeback_centisecs=$old_wb" EXIT
+
+ # open + IO lock
+ dd if=/dev/zero of=$DIR1/$tfile bs=4096 count=1 || error "Write fails"
+ $MULTIOP $DIR1/$tfile O_c &
+ MULTIOP_PID=$!
+ sleep 1
+ lctl set_param -n mdc.*.stats=clear
+ rm $DIR2/$tfile > /dev/null || error "Unlink fails for opened file"
+ kill -USR1 $MULTIOP_PID && wait $MULTIOP_PID || error "multiop failure"
+
+ local writes=$(lctl get_param -n mdc.*.stats | grep -c ost_write)
+ [ $writes -eq 0 ] || error "Found WRITE RPC but expect none"
+}
+run_test 101c "Discard DoM data on close-unlink"
+
+# test to verify file handle related system calls
+# (name_to_handle_at/open_by_handle_at)
+# The new system calls are supported in glibc >= 2.14.
+
+# test to verify we can open by handle an unlinked file from > 1 client
+# This test opens the file normally on $DIR1, which is on one mount, and then
+# opens it by handle on $DIR2, which is on a different mount.
+test_102() {
+ [ $MDS1_VERSION -lt $(version_code 2.11.57) ] &&
+ skip "Needs MDS version 2.11.57 or later"
+
+ echo "Test file_handle syscalls" > $DIR/$tfile ||
+ error "write failed"
+ check_fhandle_syscalls $DIR/$tfile $DIR2 ||
+ error "check_fhandle_syscalls failed"
+ rm -f $DIR2/$tfile
+}
+run_test 102 "Test open by handle of unlinked file"
+