413 #define FDS_IN(fds, n)		(fds->in + n)  argument
414 #define FDS_OUT(fds, n)		(fds->out + n)  argument
415 #define FDS_EX(fds, n)		(fds->ex + n)  argument
417 #define BITS(fds, n)	(*FDS_IN(fds, n)|*FDS_OUT(fds, n)|*FDS_EX(fds, n))  argument
419 static int max_select_fd(unsigned long n, fd_set_bits *fds)  in max_select_fd()  argument
427 	set = ~(~0UL << (n & (BITS_PER_LONG-1)));  in max_select_fd()
428 	n /= BITS_PER_LONG;  in max_select_fd()
430 	open_fds = fdt->open_fds + n;  in max_select_fd()
433 		set &= BITS(fds, n);  in max_select_fd()
440 	while (n) {  in max_select_fd()
442 		n--;  in max_select_fd()
443 		set = BITS(fds, n);  in max_select_fd()
455 		max += n * BITS_PER_LONG;  in max_select_fd()
478 static int do_select(int n, fd_set_bits *fds, struct timespec64 *end_time)  in do_select()  argument
489 	retval = max_select_fd(n, fds);  in do_select()
494 	n = retval;  in do_select()
514 		for (i = 0; i < n; ++rinp, ++routp, ++rexp) {  in do_select()
528 				if (i >= n)  in do_select()
624 int core_sys_select(int n, fd_set __user *inp, fd_set __user *outp,  in core_sys_select()  argument
636 	if (n < 0)  in core_sys_select()
644 	if (n > max_fds)  in core_sys_select()
645 		n = max_fds;  in core_sys_select()
652 	size = FDS_BYTES(n);  in core_sys_select()
672 	if ((ret = get_fd_set(n, inp, fds.in)) ||  in core_sys_select()
673 	    (ret = get_fd_set(n, outp, fds.out)) ||  in core_sys_select()
674 	    (ret = get_fd_set(n, exp, fds.ex)))  in core_sys_select()
676 	zero_fd_set(n, fds.res_in);  in core_sys_select()
677 	zero_fd_set(n, fds.res_out);  in core_sys_select()
678 	zero_fd_set(n, fds.res_ex);  in core_sys_select()
680 	ret = do_select(n, &fds, end_time);  in core_sys_select()
691 	if (set_fd_set(n, inp, fds.res_in) ||  in core_sys_select()
692 	    set_fd_set(n, outp, fds.res_out) ||  in core_sys_select()
693 	    set_fd_set(n, exp, fds.res_ex))  in core_sys_select()
703 static int kern_select(int n, fd_set __user *inp, fd_set __user *outp,  in kern_select()  argument
721 	ret = core_sys_select(n, inp, outp, exp, to);  in kern_select()
725 SYSCALL_DEFINE5(select, int, n, fd_set __user *, inp, fd_set __user *, outp,  in SYSCALL_DEFINE5()  argument
728 	return kern_select(n, inp, outp, exp, tvp);  in SYSCALL_DEFINE5()
731 static long do_pselect(int n, fd_set __user *inp, fd_set __user *outp,  in do_pselect()  argument
762 	ret = core_sys_select(n, inp, outp, exp, to);  in do_pselect()
794 SYSCALL_DEFINE6(pselect6, int, n, fd_set __user *, inp, fd_set __user *, outp,  in SYSCALL_DEFINE6()  argument
803 	return do_pselect(n, inp, outp, exp, tsp, x.p, x.size, PT_TIMESPEC);  in SYSCALL_DEFINE6()
808 SYSCALL_DEFINE6(pselect6_time32, int, n, fd_set __user *, inp, fd_set __user *, outp,  in SYSCALL_DEFINE6()  argument
817 	return do_pselect(n, inp, outp, exp, tsp, x.p, x.size, PT_OLD_TIMESPEC);  in SYSCALL_DEFINE6()
824 	unsigned long n;  member
835 	return kern_select(a.n, a.inp, a.outp, a.exp, a.tvp);  in SYSCALL_DEFINE1()
1193 static int compat_core_sys_select(int n, compat_ulong_t __user *inp,  in compat_core_sys_select()  argument
1203 	if (n < 0)  in compat_core_sys_select()
1211 	if (n > max_fds)  in compat_core_sys_select()
1212 		n = max_fds;  in compat_core_sys_select()
1219 	size = FDS_BYTES(n);  in compat_core_sys_select()
1234 	if ((ret = compat_get_fd_set(n, inp, fds.in)) ||  in compat_core_sys_select()
1235 	    (ret = compat_get_fd_set(n, outp, fds.out)) ||  in compat_core_sys_select()
1236 	    (ret = compat_get_fd_set(n, exp, fds.ex)))  in compat_core_sys_select()
1238 	zero_fd_set(n, fds.res_in);  in compat_core_sys_select()
1239 	zero_fd_set(n, fds.res_out);  in compat_core_sys_select()
1240 	zero_fd_set(n, fds.res_ex);  in compat_core_sys_select()
1242 	ret = do_select(n, &fds, end_time);  in compat_core_sys_select()
1253 	if (compat_set_fd_set(n, inp, fds.res_in) ||  in compat_core_sys_select()
1254 	    compat_set_fd_set(n, outp, fds.res_out) ||  in compat_core_sys_select()
1255 	    compat_set_fd_set(n, exp, fds.res_ex))  in compat_core_sys_select()
1264 static int do_compat_select(int n, compat_ulong_t __user *inp,  in do_compat_select()  argument
1283 	ret = compat_core_sys_select(n, inp, outp, exp, to);  in do_compat_select()
1287 COMPAT_SYSCALL_DEFINE5(select, int, n, compat_ulong_t __user *, inp,  in COMPAT_SYSCALL_DEFINE5()  argument
1291 	return do_compat_select(n, inp, outp, exp, tvp);  in COMPAT_SYSCALL_DEFINE5()
1295 	compat_ulong_t n;  member
1308 	return do_compat_select(a.n, compat_ptr(a.inp), compat_ptr(a.outp),  in COMPAT_SYSCALL_DEFINE1()
1312 static long do_compat_pselect(int n, compat_ulong_t __user *inp,  in do_compat_pselect()  argument
1343 	ret = compat_core_sys_select(n, inp, outp, exp, to);  in do_compat_pselect()
1367 COMPAT_SYSCALL_DEFINE6(pselect6_time64, int, n, compat_ulong_t __user *, inp,  in COMPAT_SYSCALL_DEFINE6()  argument
1376 	return do_compat_pselect(n, inp, outp, exp, tsp, compat_ptr(x.p),  in COMPAT_SYSCALL_DEFINE6()
1382 COMPAT_SYSCALL_DEFINE6(pselect6_time32, int, n, compat_ulong_t __user *, inp,  in COMPAT_SYSCALL_DEFINE6()  argument
1391 	return do_compat_pselect(n, inp, outp, exp, tsp, compat_ptr(x.p),  in COMPAT_SYSCALL_DEFINE6()