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