config/files-reg: Add opt to skip file r/w/x check on restore

A file's r/w/x changing between checkpoint and restore does
not necessarily imply that something is wrong. For example,
if a process opens a file having perms rw- for reading and
we change the perms to r--, the process can be restored and
will function as expected.

Therefore, this patch adds an option

--skip-file-rwx-check

to disable this check on restore. File validation is unaffected
and should still function as expected with respect to the content
of files.

Signed-off-by: Younes Manton <ymanton@ca.ibm.com>

2 files changed, 13 insertions, 0 deletions

diff --git a/lib/c/criu.c b/lib/c/criu.c
index 7807d7bc5..8171f7a12 100644
--- a/lib/c/criu.c
+++ b/lib/c/criu.c
@@ -555,6 +555,17 @@ void criu_set_shell_job(bool shell_job)
 	criu_local_set_shell_job(global_opts, shell_job);
 }
 
+void criu_local_set_skip_file_rwx_check(criu_opts *opts, bool skip_file_rwx_check)
+{
+	opts->rpc->has_skip_file_rwx_check = true;
+	opts->rpc->skip_file_rwx_check = skip_file_rwx_check;
+}
+
+void criu_set_skip_file_rwx_check(bool skip_file_rwx_check)
+{
+	criu_local_set_skip_file_rwx_check(global_opts, skip_file_rwx_check);
+}
+
 void criu_local_set_orphan_pts_master(criu_opts *opts, bool orphan_pts_master)
 {
 	opts->rpc->has_orphan_pts_master = true;
diff --git a/lib/c/criu.h b/lib/c/criu.h
index 7cc6a199c..c32a8a646 100644
--- a/lib/c/criu.h
+++ b/lib/c/criu.h
@@ -78,6 +78,7 @@ void criu_set_tcp_close(bool tcp_close);
 void criu_set_weak_sysctls(bool val);
 void criu_set_evasive_devices(bool evasive_devices);
 void criu_set_shell_job(bool shell_job);
+void criu_set_skip_file_rwx_check(bool skip_file_rwx_check);
 void criu_set_orphan_pts_master(bool orphan_pts_master);
 void criu_set_file_locks(bool file_locks);
 void criu_set_track_mem(bool track_mem);
@@ -238,6 +239,7 @@ void criu_local_set_tcp_close(criu_opts *opts, bool tcp_close);
 void criu_local_set_weak_sysctls(criu_opts *opts, bool val);
 void criu_local_set_evasive_devices(criu_opts *opts, bool evasive_devices);
 void criu_local_set_shell_job(criu_opts *opts, bool shell_job);
+void criu_local_set_skip_file_rwx_check(criu_opts *opts, bool skip_file_rwx_check);
 void criu_local_set_orphan_pts_master(criu_opts *opts, bool orphan_pts_master);
 void criu_local_set_file_locks(criu_opts *opts, bool file_locks);
 void criu_local_set_track_mem(criu_opts *opts, bool track_mem);