Module: xenomai-forge
Branch: next
Commit: 8f3352c0671f670491f3d5bd14508be47f87cee4
URL:
http://git.xenomai.org/?p=xenomai-forge.git;a=commit;h=8f3352c0671f670491f3d5bd14508be47f87cee4
Author: Philippe Gerum <r...@xenomai.org>
Date: Sat Aug 30 11:33:31 2014 +0200
cobalt/kernel: introduce cobalt_sysconf service
---
include/cobalt/uapi/Makefile.am | 1 +
include/cobalt/uapi/Makefile.in | 1 +
include/cobalt/uapi/syscall.h | 1 +
include/cobalt/uapi/sysconf.h | 40 ++++++++++++++++++++++++++
kernel/cobalt/posix/syscall.c | 60 +++++++++++++++++++++++++++++++++++++++
5 files changed, 103 insertions(+)
diff --git a/include/cobalt/uapi/Makefile.am b/include/cobalt/uapi/Makefile.am
index 0151e40..243c6b8 100644
--- a/include/cobalt/uapi/Makefile.am
+++ b/include/cobalt/uapi/Makefile.am
@@ -9,6 +9,7 @@ includesub_HEADERS = \
sem.h \
signal.h \
syscall.h \
+ sysconf.h \
thread.h \
time.h
diff --git a/include/cobalt/uapi/Makefile.in b/include/cobalt/uapi/Makefile.in
index 3536278..d5573de 100644
--- a/include/cobalt/uapi/Makefile.in
+++ b/include/cobalt/uapi/Makefile.in
@@ -381,6 +381,7 @@ includesub_HEADERS = \
sem.h \
signal.h \
syscall.h \
+ sysconf.h \
thread.h \
time.h
diff --git a/include/cobalt/uapi/syscall.h b/include/cobalt/uapi/syscall.h
index 3811133..904b278 100644
--- a/include/cobalt/uapi/syscall.h
+++ b/include/cobalt/uapi/syscall.h
@@ -118,6 +118,7 @@
#define sc_cobalt_backtrace 95
#define sc_cobalt_serialdbg 96
#define sc_cobalt_extend 97
+#define sc_cobalt_sysconf 98
#define __NR_COBALT_SYSCALLS 100
diff --git a/include/cobalt/uapi/sysconf.h b/include/cobalt/uapi/sysconf.h
new file mode 100644
index 0000000..f753116
--- /dev/null
+++ b/include/cobalt/uapi/sysconf.h
@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) 2014 Philippe Gerum <r...@xenomai.org>.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+#ifndef _COBALT_UAPI_SYSCONF_H
+#define _COBALT_UAPI_SYSCONF_H
+
+#define _SC_COBALT_VERSION 0
+#define _SC_COBALT_NR_PIPES 1
+#define _SC_COBALT_NR_TIMERS 2
+#define _SC_COBALT_DEBUG 3
+# define _SC_COBALT_DEBUG_ASSERT 1
+# define _SC_COBALT_DEBUG_CONTEXT 2
+# define _SC_COBALT_DEBUG_LOCKING 4
+# define _SC_COBALT_DEBUG_SYNCREL 8
+# define _SC_COBALT_DEBUG_TRACEREL 16
+#define _SC_COBALT_POLICIES 4
+# define _SC_COBALT_SCHED_FIFO 1
+# define _SC_COBALT_SCHED_RR 2
+# define _SC_COBALT_SCHED_WEAK 4
+# define _SC_COBALT_SCHED_SPORADIC 8
+# define _SC_COBALT_SCHED_QUOTA 16
+# define _SC_COBALT_SCHED_TP 32
+#define _SC_COBALT_WATCHDOG 5
+#define _SC_COBALT_EXTENSION 6
+
+#endif /* !_COBALT_UAPI_SYSCONF_H */
diff --git a/kernel/cobalt/posix/syscall.c b/kernel/cobalt/posix/syscall.c
index 747b2be..d5a8e45 100644
--- a/kernel/cobalt/posix/syscall.c
+++ b/kernel/cobalt/posix/syscall.c
@@ -19,9 +19,12 @@
#include <linux/types.h>
#include <linux/err.h>
#include <linux/ipipe.h>
+#include <linux/kconfig.h>
#include <cobalt/uapi/syscall.h>
+#include <cobalt/uapi/sysconf.h>
#include <cobalt/kernel/tree.h>
#include <cobalt/kernel/vdso.h>
+#include <xenomai/version.h>
#include <asm-generic/xenomai/mayday.h>
#include "internal.h"
#include "thread.h"
@@ -653,6 +656,62 @@ static int cobalt_extend(unsigned int magic)
return cobalt_bind_personality(magic);
}
+static int cobalt_sysconf(int option, void __user *u_buf, size_t u_bufsz)
+{
+ int ret, val = 0;
+
+ if (u_bufsz < sizeof(val))
+ return -EINVAL;
+
+ switch (option) {
+ case _SC_COBALT_VERSION:
+ val = XENO_VERSION_CODE;
+ break;
+ case _SC_COBALT_NR_PIPES:
+#if IS_ENABLED(CONFIG_XENO_OPT_PIPE)
+ val = CONFIG_XENO_OPT_PIPE_NRDEV;
+#endif
+ break;
+ case _SC_COBALT_NR_TIMERS:
+ val = CONFIG_XENO_OPT_NRTIMERS;
+ break;
+ case _SC_COBALT_POLICIES:
+ val = _SC_COBALT_SCHED_FIFO|_SC_COBALT_SCHED_RR;
+ if (IS_ENABLED(CONFIG_XENO_OPT_SCHED_WEAK))
+ val |= _SC_COBALT_SCHED_WEAK;
+ if (IS_ENABLED(CONFIG_XENO_OPT_SCHED_SPORADIC))
+ val |= _SC_COBALT_SCHED_SPORADIC;
+ if (IS_ENABLED(CONFIG_XENO_OPT_SCHED_QUOTA))
+ val |= _SC_COBALT_SCHED_QUOTA;
+ if (IS_ENABLED(CONFIG_XENO_OPT_SCHED_TP))
+ val |= _SC_COBALT_SCHED_TP;
+ break;
+ case _SC_COBALT_DEBUG:
+ if (IS_ENABLED(CONFIG_XENO_OPT_DEBUG_NUCLEUS))
+ val |= _SC_COBALT_DEBUG_ASSERT;
+ if (IS_ENABLED(CONFIG_XENO_OPT_DEBUG_CONTEXT))
+ val |= _SC_COBALT_DEBUG_CONTEXT;
+ if (IS_ENABLED(CONFIG_XENO_OPT_DEBUG_LOCKING))
+ val |= _SC_COBALT_DEBUG_LOCKING;
+ if (IS_ENABLED(CONFIG_XENO_OPT_DEBUG_SYNCH_RELAX))
+ val |= _SC_COBALT_DEBUG_SYNCREL;
+ if (IS_ENABLED(CONFIG_XENO_OPT_DEBUG_TRACE_RELAX))
+ val |= _SC_COBALT_DEBUG_TRACEREL;
+ break;
+ case _SC_COBALT_WATCHDOG:
+#if IS_ENABLED(CONFIG_XENO_OPT_WATCHDOG)
+ val = CONFIG_XENO_OPT_WATCHDOG_TIMEOUT;
+#endif
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ ret = __xn_safe_copy_from_user(u_buf, &val, sizeof(val));
+
+ return ret ? -EFAULT : 0;
+}
+
static int cobalt_ni(void)
{
return -ENOSYS;
@@ -767,4 +826,5 @@ static struct cobalt_syscall cobalt_syscalls[] = {
__COBALT_CALL(sc_cobalt_mayday, cobalt_mayday, oneway),
__COBALT_CALL(sc_cobalt_backtrace, cobalt_backtrace, current),
__COBALT_CALL(sc_cobalt_serialdbg, cobalt_serialdbg, current),
+ __COBALT_CALL(sc_cobalt_sysconf, cobalt_sysconf, current),
};
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