2821 static int check_unshare_flags(unsigned long unshare_flags)  in check_unshare_flags()  argument
2823 	if (unshare_flags & ~(CLONE_THREAD|CLONE_FS|CLONE_NEWNS|CLONE_SIGHAND|  in check_unshare_flags()
2835 	if (unshare_flags & (CLONE_THREAD | CLONE_SIGHAND | CLONE_VM)) {  in check_unshare_flags()
2839 	if (unshare_flags & (CLONE_SIGHAND | CLONE_VM)) {  in check_unshare_flags()
2843 	if (unshare_flags & CLONE_VM) {  in check_unshare_flags()
2854 static int unshare_fs(unsigned long unshare_flags, struct fs_struct **new_fsp)  in unshare_fs()  argument
2858 	if (!(unshare_flags & CLONE_FS) || !fs)  in unshare_fs()
2875 int unshare_fd(unsigned long unshare_flags, unsigned int max_fds,  in unshare_fd()  argument
2881 	if ((unshare_flags & CLONE_FILES) &&  in unshare_fd()
2899 int ksys_unshare(unsigned long unshare_flags)  in ksys_unshare()  argument
2912 	if (unshare_flags & CLONE_NEWUSER)  in ksys_unshare()
2913 		unshare_flags |= CLONE_THREAD | CLONE_FS;  in ksys_unshare()
2917 	if (unshare_flags & CLONE_VM)  in ksys_unshare()
2918 		unshare_flags |= CLONE_SIGHAND;  in ksys_unshare()
2922 	if (unshare_flags & CLONE_SIGHAND)  in ksys_unshare()
2923 		unshare_flags |= CLONE_THREAD;  in ksys_unshare()
2927 	if (unshare_flags & CLONE_NEWNS)  in ksys_unshare()
2928 		unshare_flags |= CLONE_FS;  in ksys_unshare()
2930 	err = check_unshare_flags(unshare_flags);  in ksys_unshare()
2938 	if (unshare_flags & (CLONE_NEWIPC|CLONE_SYSVSEM))  in ksys_unshare()
2940 	err = unshare_fs(unshare_flags, &new_fs);  in ksys_unshare()
2943 	err = unshare_fd(unshare_flags, NR_OPEN_MAX, &new_fd);  in ksys_unshare()
2946 	err = unshare_userns(unshare_flags, &new_cred);  in ksys_unshare()
2949 	err = unshare_nsproxy_namespaces(unshare_flags, &new_nsproxy,  in ksys_unshare()
2961 		if (unshare_flags & CLONE_NEWIPC) {  in ksys_unshare()
3015 SYSCALL_DEFINE1(unshare, unsigned long, unshare_flags)  in SYSCALL_DEFINE1()  argument
3017 	return ksys_unshare(unshare_flags);  in SYSCALL_DEFINE1()