Initial revision

kernel/Makefile

@@ -0,0 +1,13 @@
+#
+# Makefile for the linux system information tables.
+#
+# Note! Dependencies are done automagically by 'make dep', which also
+# removes any old dependencies. DON'T put your own dependencies here
+# unless it's something special (ie not a .c file).
+#
+# Note 2! The CFLAGS definition is now in the main makefile...
+
+O_TARGET := table.o
+O_OBJS   := main.o
+
+include $(TOPDIR)/Rules.make

kernel/main.c

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+/*
+ * linux/table/table_impl.c
+ * Copyright (C) 1998 Martin Baulig
+ */
+
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/kernel_stat.h>
+#include <linux/tty.h>
+#include <linux/user.h>
+#include <linux/a.out.h>
+#include <linux/string.h>
+#include <linux/mman.h>
+#include <linux/proc_fs.h>
+#include <linux/ioport.h>
+#include <linux/config.h>
+#include <linux/mm.h>
+#include <linux/pagemap.h>
+#include <linux/swap.h>
+
+#include <asm/segment.h>
+#include <asm/pgtable.h>
+#include <asm/io.h>
+
+#include <linux/table.h>
+
+#include "version.h"
+
+asmlinkage int
+sys_table (int type, union table *buf)
+{
+	union table tbl;
+	struct sysinfo i;
+	int err;
+
+	if (type == TABLE_VERSION)
+		return _TABLE_VERSION;
+
+	if (!buf)
+		return -EFAULT;
+
+	switch (type) {
+	case TABLE_CPU:
+		tbl.cpu.total = jiffies;    
+		tbl.cpu.user  = kstat.cpu_user;
+		tbl.cpu.nice  = kstat.cpu_nice;
+		tbl.cpu.sys   = kstat.cpu_system;
+		tbl.cpu.idle  = tbl.cpu.total - (tbl.cpu.user + tbl.cpu.nice + tbl.cpu.sys);
+		tbl.cpu.frequency = HZ;
+		break;
+	case TABLE_MEM:
+		si_meminfo (&i);
+		tbl.mem.total  = i.totalram;
+		tbl.mem.used   = i.totalram - i.freeram;
+		tbl.mem.free   = i.freeram;
+		tbl.mem.shared = i.sharedram;
+		tbl.mem.buffer = i.bufferram;
+		tbl.mem.cached = page_cache_size << PAGE_SHIFT;
+		break;
+	case TABLE_SWAP:
+		si_swapinfo (&i);
+		tbl.swap.total = i.totalswap;
+		tbl.swap.used  = i.totalswap - i.freeswap;
+		tbl.swap.free  = i.freeswap;
+		break;
+	case TABLE_LOADAVG:
+		tbl.loadavg.loadavg [0] = avenrun [0];
+		tbl.loadavg.loadavg [1] = avenrun [1];
+		tbl.loadavg.loadavg [2] = avenrun [2];
+		tbl.loadavg.nr_running = nr_running;
+		tbl.loadavg.nr_tasks = nr_tasks;
+		tbl.loadavg.last_pid = last_pid;
+		break;
+	case TABLE_UPTIME:
+		tbl.uptime.uptime = jiffies;
+		tbl.uptime.idle   = task[0]->utime + task[0]->stime;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	err = verify_area (VERIFY_WRITE, buf, sizeof (struct table));
+	if (err)
+		return err;
+
+	memcpy_tofs (buf, &tbl, sizeof (union table));
+	return 0;
+}

kernel/table.h

@@ -0,0 +1,80 @@
+#ifndef _LINUX_TABLE_H
+#define _LINUX_TABLE_H
+#include <linux/types.h>
+
+#define TABLE_VERSION	0
+#define TABLE_CPU	1
+#define TABLE_MEM	2
+#define TABLE_SWAP	3
+#define TABLE_LOADAVG	4
+#define TABLE_UPTIME	5
+
+/* CPU Usage (in jiffies = 1/100th seconds) */
+
+struct table_cpu
+{
+	unsigned long total;		/* Total CPU Time		*/
+	unsigned long user;		/* CPU Time in User Mode	*/
+	unsigned long nice;		/* CPU Time in User Mode (nice)	*/
+	unsigned long sys;		/* CPU Time in System Mode	*/
+	unsigned long idle;		/* CPU Time in the Idle Task	*/
+	unsigned long frequency;	/* Tick frequency		*/
+};
+
+/* Memory Usage (in bytes) */
+
+struct table_mem
+{
+	unsigned long total;		/* Total physical memory	*/
+	unsigned long used;		/* Used memory size		*/
+	unsigned long free;		/* Free memory size		*/
+	unsigned long shared;		/* Shared memory size		*/
+	unsigned long buffer;		/* Size of buffers		*/
+	unsigned long cached;		/* Size of cached memory       	*/
+};
+
+/* Swap Space (in bytes) */
+
+struct table_swap
+{
+	unsigned long total;		/* Total swap space		*/
+	unsigned long used;		/* Used swap space		*/
+	unsigned long free;		/* Free swap space		*/
+};
+
+/* Load average */
+
+struct table_loadavg
+{
+	unsigned long loadavg [3];
+	unsigned nr_running;
+	unsigned nr_tasks;
+	unsigned last_pid;
+};
+
+/* Uptime */
+
+struct table_uptime
+{
+	unsigned long uptime;
+	unsigned long idle;
+};
+
+/* Union */
+
+union table
+{
+	struct table_cpu cpu;
+	struct table_mem mem;
+	struct table_swap swap;
+	struct table_loadavg loadavg;
+	struct table_uptime uptime;
+};
+
+#ifdef __KERNEL__
+
+#endif /* __KERNEL__ */
+
+#endif /* _LINUX_IPC_H */
+
+

kernel/test.c

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+#include <stdio.h>
+#include <stdlib.h>
+
+#include <unistd.h>
+#include <linux/unistd.h>
+#include <linux/table.h>
+
+#include <syscall.h>
+
+static inline _syscall2 (int, table, int, type, union table *, tbl);
+
+int
+main (void)
+{
+	union table tbl;
+	int ret;
+
+	ret = table (TABLE_VERSION, NULL);
+
+	if (ret == -1) {
+		fprintf (stderr, "table(%u): %s\n", TABLE_VERSION, sys_errlist [errno]);
+		exit (-errno);
+	}
+
+	fprintf (stderr, "Table (%u) = %u\n", TABLE_VERSION, ret);
+
+	ret = table (TABLE_CPU, &tbl);
+
+	if (ret == -1) {
+		fprintf (stderr, "table(%u): %s\n", TABLE_CPU, sys_errlist [errno]);
+		exit (-errno);
+	}
+
+	fprintf (stderr, "Table (%u) = %lu, %lu, %lu, %lu, %lu, %lu\n",
+		 TABLE_CPU, tbl.cpu.total, tbl.cpu.user, tbl.cpu.nice,
+		 tbl.cpu.sys, tbl.cpu.idle, tbl.cpu.frequency);
+
+	ret = table (TABLE_MEM, &tbl);
+
+	if (ret == -1) {
+		fprintf (stderr, "table(%u): %s\n", TABLE_MEM, sys_errlist [errno]);
+		exit (-errno);
+	}
+
+	fprintf (stderr, "Table (%u) = %lu, %lu, %lu, %lu, %lu, %lu\n",
+		 TABLE_MEM, tbl.mem.total, tbl.mem.used, tbl.mem.free,
+		 tbl.mem.shared, tbl.mem.buffer, tbl.mem.cached);
+
+	ret = table (TABLE_SWAP, &tbl);
+
+	if (ret == -1) {
+		fprintf (stderr, "table(%u): %s\n", TABLE_SWAP, sys_errlist [errno]);
+		exit (-errno);
+	}
+
+	fprintf (stderr, "Table (%u) = %lu, %lu, %lu\n",
+		 TABLE_SWAP, tbl.swap.total, tbl.swap.used, tbl.swap.free);
+	
+	ret = table (TABLE_LOADAVG, &tbl);
+
+	if (ret == -1) {
+		fprintf (stderr, "table(%u): %s\n", TABLE_LOADAVG, sys_errlist [errno]);
+		exit (-errno);
+	}
+
+	fprintf (stderr, "Table (%u) = (%lu, %lu, %lu) - %u, %u, %u\n",
+		 TABLE_LOADAVG, tbl.loadavg.loadavg [0], tbl.loadavg.loadavg [1],
+		 tbl.loadavg.loadavg [2], tbl.loadavg.nr_running,
+		 tbl.loadavg.nr_tasks, tbl.loadavg.last_pid);
+	
+	ret = table (TABLE_UPTIME, &tbl);
+
+	if (ret == -1) {
+		fprintf (stderr, "table(%u): %s\n", TABLE_UPTIME, sys_errlist [errno]);
+		exit (-errno);
+	}
+
+	fprintf (stderr, "Table (%u) = %lu, %lu\n",
+		 TABLE_UPTIME, tbl.uptime.uptime, tbl.uptime.idle);
+	
+	exit (0);
+}

kernel/version.h

@@ -0,0 +1 @@
+#define _TABLE_VERSION	1