Initial revision

5 files changed, 450 insertions, 0 deletions

diff --git a/kernel/sysctl/Makefile b/kernel/sysctl/Makefile
new file mode 100644
index 00000000..77dd277a
--- /dev/null
+++ b/kernel/sysctl/Makefile
@@ -0,0 +1,22 @@
+#
+# Makefile for the LibGTop linux sysctl interface.
+#
+# 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 := kernel.o
+ifeq ($(CONFIG_LIBGTOP),y)
+O_OJBS   := main.o libgtop.o
+else
+O_OBJS   := main.o
+endif
+OX_OBJS  := libgtop_syms.o
+
+ifeq ($(CONFIG_LIBGTOP),m)
+M_OBJS   := libgtop.o
+endif
+
+include $(TOPDIR)/Rules.make
diff --git a/kernel/sysctl/libgtop.c b/kernel/sysctl/libgtop.c
new file mode 100644
index 00000000..e77c6af2
--- /dev/null
+++ b/kernel/sysctl/libgtop.c
@@ -0,0 +1,318 @@
+/*
+ * linux/libgtop/module.c
+ * Copyright (C) 1999 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 <linux/slab.h>
+#include <linux/smp.h>
+#include <linux/signal.h>
+
+#include <asm/uaccess.h>
+#include <asm/pgtable.h>
+#include <asm/io.h>
+
+#include <linux/sysctl.h>
+#include <linux/module.h>
+
+#include <linux/libgtop.h>
+
+EXPORT_NO_SYMBOLS;
+
+static int system_ctl_handler (ctl_table *table, int *name, int nlen,
+			       void *oldval, size_t *oldlenp, void *newval,
+			       size_t newlen, void **context);
+
+static int proc_ctl_handler (ctl_table *table, int *name, int nlen,
+			     void *oldval, size_t *oldlenp, void *newval,
+			     size_t newlen, void **context);
+
+static int libgtop_sysctl_version = 1;
+static int libgtop_update_expensive = 5000;
+
+static struct ctl_table_header *libgtop_sysctl_header = NULL;
+
+static libgtop_stat_t libgtop_stat;
+static unsigned int libgtop_mem_timestamp = 0;
+static libgtop_mem_t libgtop_mem;
+static unsigned int libgtop_swap_timestamp = 0;
+static libgtop_swap_t libgtop_swap;
+static libgtop_proclist_t libgtop_proclist;
+
+static ctl_table libgtop_table[];
+static ctl_table proc_table[];
+
+static ctl_table libgtop_root_table[] = {
+    {CTL_LIBGTOP, "libgtop", NULL, 0, 0555, libgtop_table},
+    {0}
+};
+
+#ifdef MODULE
+static
+#endif
+ctl_table libgtop_table[] = {
+    {LIBGTOP_VERSION, "version", &libgtop_sysctl_version,
+     sizeof (int), 0444, NULL, &proc_dointvec},
+    {LIBGTOP_PROC, NULL, NULL, 0, 0555, proc_table},
+    {LIBGTOP_UPDATE_EXPENSIVE, "update_expensive",
+     &libgtop_update_expensive, sizeof (int), 0664, NULL, &proc_dointvec},
+    {LIBGTOP_STAT, NULL, &libgtop_stat, sizeof (libgtop_stat),
+     0444, NULL, NULL, &system_ctl_handler},
+    {LIBGTOP_MEM, NULL, &libgtop_mem, sizeof (libgtop_mem),
+     0444, NULL, NULL, &system_ctl_handler},
+    {LIBGTOP_SWAP, NULL, &libgtop_swap, sizeof (libgtop_swap),
+     0444, NULL, NULL, &system_ctl_handler},
+    {LIBGTOP_PROCLIST, NULL, &libgtop_proclist, sizeof (libgtop_proclist),
+     0444, NULL, NULL, &system_ctl_handler},
+    {0}
+};
+
+static ctl_table proc_table[] = {
+    {CTL_ANY, NULL, NULL, 0, 04444, NULL, NULL, &proc_ctl_handler},
+    {0}
+};
+
+#ifdef MODULE
+static void
+libgtop_sysctl_register(void)
+{
+    static int initialized = 0;
+
+    if (initialized == 1)
+	return;
+
+    libgtop_sysctl_header = register_sysctl_table(libgtop_root_table, 1);
+    initialized = 1;
+}
+
+static void
+libgtop_sysctl_unregister(void)
+{
+    unregister_sysctl_table(libgtop_sysctl_header);
+}
+
+int init_module(void)
+{
+    libgtop_sysctl_register();
+    return 0;
+}
+
+void cleanup_module(void)
+{
+    libgtop_sysctl_unregister();
+}
+
+#endif /* MODULE */
+
+static int
+libgtop_sysctl (ctl_table *table, int nlen, int *name)
+{
+    extern unsigned long total_forks;
+    int index, tindex, tty, which, arg;
+    libgtop_stat_t *lstat;
+    libgtop_mem_t *mem;
+    libgtop_swap_t *swap;
+    libgtop_proclist_t *proclist;
+    struct task_struct *tsk = NULL;
+    struct sysinfo i;
+
+    switch (table->ctl_name) {
+    case LIBGTOP_STAT:
+	lstat = table->data;
+	lstat->cpu.total = jiffies;
+	lstat->cpu.user  = kstat.cpu_user;
+	lstat->cpu.nice  = kstat.cpu_nice;
+	lstat->cpu.sys   = kstat.cpu_system;
+	lstat->cpu.idle  = jiffies*smp_num_cpus -
+	    (lstat->cpu.user + lstat->cpu.nice + lstat->cpu.sys);
+#ifdef __SMP__
+	for (i = 0; i < smp_num_cpus; i++) {
+	    lstat->xcpu[i].user = kstat.per_cpu_user[cpu_logical_map(i)];
+	    lstat->xcpu[i].nice = kstat.per_cpu_nice[cpu_logical_map(i)];
+	    lstat->xcpu[i].sys = kstat.per_cpu_system[cpu_logical_map(i)];
+	    lstat->xcpu[i].idle = jiffies -
+		(lstat->xcpu[i].user + lstat->xcpu[i].nice +
+		 lstat->xcpu[i].sys);
+	}
+
+	lstat->ncpu = smp_num_cpus;
+#else
+	lstat->ncpu = 0;
+#endif
+
+	lstat->frequency = HZ;
+
+	lstat->loadavg [0] = (double) avenrun [0] / (1 << FSHIFT);
+	lstat->loadavg [1] = (double) avenrun [1] / (1 << FSHIFT);
+	lstat->loadavg [2] = (double) avenrun [2] / (1 << FSHIFT);
+
+	lstat->pgpgin = kstat.pgpgin;
+	lstat->pgpgout = kstat.pgpgout;
+	lstat->pswpin = kstat.pswpin;
+	lstat->pswpout = kstat.pswpout;
+
+	lstat->context_swtch = kstat.context_swtch;
+	lstat->boot_time = xtime.tv_sec - jiffies / HZ;
+	lstat->total_forks = total_forks;
+	break;
+    case LIBGTOP_MEM:
+	if (jiffies - libgtop_mem_timestamp < libgtop_update_expensive)
+	    return 0;
+	libgtop_mem_timestamp = jiffies;
+	printk ("Time: %lu\n", jiffies);
+
+	mem = table->data;
+	si_meminfo (&i);
+
+	mem->totalram = i.totalram;
+	mem->freeram = i.freeram;
+	mem->sharedram = i.sharedram;
+	mem->bufferram = i.bufferram;
+	return 0;
+    case LIBGTOP_SWAP:
+	if (jiffies - libgtop_swap_timestamp < libgtop_update_expensive)
+	    return 0;
+	libgtop_swap_timestamp = jiffies;
+	printk ("Time: %lu\n", jiffies);
+
+	swap = table->data;
+	si_swapinfo (&i);
+
+	swap->totalswap = i.totalswap;
+	swap->freeswap = i.freeswap;
+	return 0;
+    case LIBGTOP_PROCLIST:
+	proclist = table->data;
+
+	if (nlen == 1) {
+	    which = 0;
+	    arg = 0;
+	} else if (nlen == 2) {
+	    which = name [1];
+	    arg = 0;
+	} else if (nlen == 3) {
+	    which = name [1];
+	    arg = name [2];
+	} else {
+	    return -EINVAL;
+	}
+
+	tsk = task [0];
+	read_lock (&tasklist_lock);
+	for (index = tindex = 0; index < nr_tasks;
+	     index++, tsk = tsk->next_task) {
+	    if (tsk->pid == 0) continue;
+	    switch (which & LIBGTOP_PROCLIST_MASK) {
+	    case LIBGTOP_PROCLIST_PID:
+		if (tsk->pid != arg) continue;
+		break;
+	    case LIBGTOP_PROCLIST_PGRP:
+		if (tsk->pgrp != arg) continue;
+		break;
+	    case LIBGTOP_PROCLIST_SESSION:
+		if (tsk->session != arg) continue;
+		break;
+	    case LIBGTOP_PROCLIST_TTY:
+		tty = tsk->tty ?
+		    kdev_t_to_nr (tsk->tty->device) : 0;
+		if (tty != arg) continue;
+		break;
+	    case LIBGTOP_PROCLIST_UID:
+		if (tsk->uid != arg) continue;
+		break;
+	    case LIBGTOP_PROCLIST_RUID:
+		if (tsk->euid != arg) continue;
+		break;
+	    }
+
+	    if ((which & LIBGTOP_EXCLUDE_IDLE) && (tsk->state != 0))
+		continue;
+
+	    if ((which & LIBGTOP_EXCLUDE_NOTTY) && (tsk->tty == NULL))
+		continue;
+			
+	    proclist->pids [tindex++] = tsk->pid;
+	}
+
+	proclist->nr_running = nr_running;
+	proclist->last_pid = last_pid;
+	proclist->nr_tasks = tindex;
+	read_unlock(&tasklist_lock);
+	return 0;
+    default:
+	return -EINVAL;
+    }
+
+    return 0;
+}
+
+static int
+system_ctl_handler (ctl_table *table, int *name, int nlen,
+		    void *oldval, size_t *oldlenp, void *newval,
+		    size_t newlen, void **context)
+{
+    int ret, len, len_name;
+
+    if (!table->data || !table->maxlen)
+	return -ENOTDIR;
+
+    if (!oldval || !oldlenp || get_user(len, oldlenp))
+	return -EFAULT;
+
+    if (!name || !nlen || get_user(len_name, name))
+	return -EFAULT;
+
+    if (len != table->maxlen)
+	return -EFAULT;
+
+    ret = libgtop_sysctl (table, nlen, name);
+    if (ret) return ret;
+
+    if(copy_to_user(oldval, table->data, len))
+	return -EFAULT;
+
+    return 1;
+}
+
+static int
+proc_ctl_handler (ctl_table *table, int *name, int nlen,
+		  void *oldval, size_t *oldlenp, void *newval,
+		  size_t newlen, void **context)
+{
+    int ret, len;
+
+    printk ("proc_ctl_handler: %p - %p - %d - (%p,%p) - (%p,%d) - %p\n",
+	    table, name, nlen, oldval, oldlenp, newval, newlen, context);
+
+    if (!name || !nlen || get_user(len, name))
+	return -EFAULT;
+
+    printk ("FUNCTION: %d - %d - %p\n", table->ctl_name,
+	    *name, table->de);
+
+    if (!table->data || !table->maxlen)
+	return -ENOTDIR;
+
+    if (!oldval || !oldlenp || get_user(len, oldlenp))
+	return -EFAULT;
+
+    if (len != table->maxlen)
+	return -EFAULT;
+
+    return -ENOSYS;
+}
diff --git a/kernel/sysctl/libgtop.h b/kernel/sysctl/libgtop.h
new file mode 100644
index 00000000..f860e546
--- /dev/null
+++ b/kernel/sysctl/libgtop.h
@@ -0,0 +1,82 @@
+#ifndef _LINUX_LIBGTOP_H
+#define _LINUX_LIBGTOP_H 1
+
+#include <linux/tasks.h>
+
+enum {
+    LIBGTOP_VERSION = 1,
+    LIBGTOP_PROC,
+    LIBGTOP_UPDATE_EXPENSIVE,
+    LIBGTOP_STAT,
+    LIBGTOP_MEM,
+    LIBGTOP_SWAP,
+    LIBGTOP_PROCLIST
+};
+
+enum {
+    LIBGTOP_PROCLIST_ALL = 0,
+    LIBGTOP_PROCLIST_PID,
+    LIBGTOP_PROCLIST_PGRP,
+    LIBGTOP_PROCLIST_SESSION,
+    LIBGTOP_PROCLIST_TTY,
+    LIBGTOP_PROCLIST_UID,
+    LIBGTOP_PROCLIST_RUID
+};
+
+#define LIBGTOP_PROCLIST_MASK		15	
+
+#define LIBGTOP_EXCLUDE_IDLE		0x1000
+#define LIBGTOP_EXCLUDE_SYSTEM		0x2000
+#define LIBGTOP_EXCLUDE_NOTTY		0x4000
+
+typedef struct libgtop_stat libgtop_stat_t;
+
+typedef struct libgtop_cpu libgtop_cpu_t;
+typedef struct libgtop_mem libgtop_mem_t;
+typedef struct libgtop_swap libgtop_swap_t;
+typedef struct libgtop_proclist libgtop_proclist_t;
+
+struct libgtop_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	*/
+};
+
+struct libgtop_mem
+{
+    unsigned long totalram;		/* Total usable main memory size */
+    unsigned long freeram;		/* Available memory size */
+    unsigned long sharedram;		/* Amount of shared memory */
+    unsigned long bufferram;		/* Memory used by buffers */
+};
+
+struct libgtop_swap
+{
+    unsigned long totalswap;		/* Total swap space size */
+    unsigned long freeswap;		/* swap space still available */
+};
+
+struct libgtop_proclist
+{
+    int nr_running, nr_tasks, last_pid;
+    unsigned pids [NR_TASKS];
+};
+
+struct libgtop_stat
+{
+    int ncpu;				/* Number of CPUs		*/
+    unsigned long frequency;		/* Tick frequency (HZ)		*/
+    libgtop_cpu_t cpu;			/* CPU statistics		*/
+    libgtop_cpu_t xcpu [NR_CPUS];	/* SMP per-CPU statistics	*/
+    double loadavg [3];			/* Load average			*/
+    unsigned long total_forks;		/* Total # of forks		*/
+    unsigned int context_swtch;		/* Total # of context switches	*/
+    unsigned long boot_time;		/* Boot time (seconds s. epoch)	*/
+    unsigned int pgpgin, pgpgout;	/* # of pages paged in/out	*/
+    unsigned int pswpin, pswpout;	/* # of swap pgs brought in/out	*/
+};
+
+#endif
diff --git a/kernel/sysctl/libgtop_syms.c b/kernel/sysctl/libgtop_syms.c
new file mode 100644
index 00000000..874dadcd
--- /dev/null
+++ b/kernel/sysctl/libgtop_syms.c
@@ -0,0 +1,24 @@
+/*
+ * linux/libgtop/libgtop_syms.c
+ * Copyright (C) 1999 Martin Baulig
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+
+#include <linux/sched.h>
+
+#include <linux/mm.h>
+#include <linux/pagemap.h>
+#include <linux/swap.h>
+
+extern unsigned long total_forks;
+
+EXPORT_SYMBOL(task);
+EXPORT_SYMBOL(avenrun);
+EXPORT_SYMBOL(nr_running);
+EXPORT_SYMBOL(nr_tasks);
+EXPORT_SYMBOL(last_pid);
+EXPORT_SYMBOL(total_forks);
+EXPORT_SYMBOL(si_swapinfo);
+
diff --git a/kernel/sysctl/main.c b/kernel/sysctl/main.c
new file mode 100644
index 00000000..6d391eb4
--- /dev/null
+++ b/kernel/sysctl/main.c
@@ -0,0 +1,4 @@
+/*
+ * linux/libgtop/main.c
+ * Copyright (C) 1999 Martin Baulig
+ */