zdtm: add pidfd store based pid reuse test

This is just a symlink to the original transition/pid_reuse test with
the right options passed to trigger the pidfd store based pid reuse
detection code path.

Pidfd store based detection is supported only in RPC mode which
requires passing a unix socket fd to be used as pidfd store and
the kernel should support pidfd_open and pidfd_getfd syscalls
{'feature': 'pidfd_store'} for this test to work.

Signed-off-by: Zeyad Yasser <zeyady98@gmail.com>

scripts/ci/run-ci-tests.sh

@@ -253,7 +253,8 @@ make -C test/others/rpc/ run
 ./test/zdtm.py run -t zdtm/transition/maps007 --pre 2 --page-server
 ./test/zdtm.py run -t zdtm/transition/maps007 --pre 2 --page-server --dedup
 
-./test/zdtm.py run -t zdtm/transition/pid_reuse --pre 2
+./test/zdtm.py run -t zdtm/transition/pid_reuse --pre 2 # start time based pid reuse detection
+./test/zdtm.py run -t zdtm/transition/pidfd_store_sk --rpc --pre 2 # pidfd based pid reuse detection
 
 ./test/zdtm.py run -t zdtm/static/socket-tcp-local --norst
 

scripts/ci/vagrant.sh

@@ -53,6 +53,9 @@ fedora-no-vdso() {
 	# BPF tests are failing see: https://github.com/checkpoint-restore/criu/issues/1354
 	# Needs to be fixed, skip for now
 	ssh default 'cd /vagrant/criu/test; sudo ./zdtm.py run -a --keep-going -x zdtm/static/bpf_hash -x zdtm/static/bpf_array'
+	# This test (pidfd_store_sk) requires pidfd_getfd syscall which is guaranteed in Fedora 33.
+	# It is also skipped from -a because it runs in RPC mode only
+	ssh default 'cd /vagrant/criu/test; sudo ./zdtm.py run -t zdtm/transition/pidfd_store_sk --rpc --pre 2'
 }
 
 $1

test/zdtm/transition/Makefile

@@ -22,6 +22,7 @@ TST_NOFILE	=	\
 		shmem		\
 		lazy-thp	\
 		pid_reuse	\
+		pidfd_store_sk \
 
 
 TST_FILE	=	\

test/zdtm/transition/pidfd_store_sk.c

@@ -0,0 +1 @@
+pid_reuse.c

test/zdtm/transition/pidfd_store_sk.desc

@@ -0,0 +1 @@
+{'flags': 'noauto suid pre-dump-notify', 'opts': '--pidfd-store', 'feature': 'pidfd_store'}