548 lines
12 KiB
C
548 lines
12 KiB
C
/*
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* linux/fs/proc/array.c
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*
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* Copyright (C) 1992 by Linus Torvalds
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* based on ideas by Darren Senn
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*
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* stat,statm extensions by Michael K. Johnson, johnsonm@stolaf.edu
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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 <asm/segment.h>
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#include <asm/io.h>
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#define LOAD_INT(x) ((x) >> FSHIFT)
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#define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100)
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#ifdef CONFIG_DEBUG_MALLOC
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int get_malloc(char * buffer);
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#endif
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static int read_core(struct inode * inode, struct file * file,char * buf, int count)
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{
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unsigned long p = file->f_pos;
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int read;
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int count1;
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char * pnt;
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struct user dump;
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memset(&dump, 0, sizeof(struct user));
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dump.magic = CMAGIC;
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dump.u_dsize = high_memory >> 12;
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if (count < 0)
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return -EINVAL;
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if (p >= high_memory)
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return 0;
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if (count > high_memory - p)
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count = high_memory - p;
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read = 0;
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if (p < sizeof(struct user) && count > 0) {
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count1 = count;
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if (p + count1 > sizeof(struct user))
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count1 = sizeof(struct user)-p;
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pnt = (char *) &dump + p;
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memcpy_tofs(buf,(void *) pnt, count1);
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buf += count1;
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p += count1;
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count -= count1;
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read += count1;
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}
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while (p < 2*PAGE_SIZE && count > 0) {
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put_fs_byte(0,buf);
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buf++;
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p++;
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count--;
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read++;
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}
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memcpy_tofs(buf,(void *) (p - PAGE_SIZE),count);
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read += count;
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file->f_pos += read;
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return read;
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}
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static int get_loadavg(char * buffer)
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{
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int a, b, c;
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a = avenrun[0] + (FIXED_1/200);
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b = avenrun[1] + (FIXED_1/200);
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c = avenrun[2] + (FIXED_1/200);
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return sprintf(buffer,"%d.%02d %d.%02d %d.%02d\n",
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LOAD_INT(a), LOAD_FRAC(a),
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LOAD_INT(b), LOAD_FRAC(b),
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LOAD_INT(c), LOAD_FRAC(c));
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}
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static int get_kstat(char * buffer)
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{
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return sprintf(buffer, "cpu %u %u %u %lu\n"
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"disk %u %u %u %u\n"
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"page %u %u\n"
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"swap %u %u\n"
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"intr %u\n"
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"ctxt %u\n"
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"btime %lu\n",
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kstat.cpu_user,
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kstat.cpu_nice,
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kstat.cpu_system,
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jiffies - (kstat.cpu_user + kstat.cpu_nice + kstat.cpu_system),
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kstat.dk_drive[0],
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kstat.dk_drive[1],
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kstat.dk_drive[2],
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kstat.dk_drive[3],
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kstat.pgpgin,
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kstat.pgpgout,
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kstat.pswpin,
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kstat.pswpout,
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kstat.interrupts,
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kstat.context_swtch,
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xtime.tv_sec - jiffies / HZ);
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}
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static int get_uptime(char * buffer)
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{
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unsigned long uptime;
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unsigned long idle;
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uptime = jiffies;
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idle = task[0]->utime + task[0]->stime;
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return sprintf(buffer,"%lu.%02lu %lu.%02lu\n",
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uptime / HZ,
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uptime % HZ,
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idle / HZ,
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idle % HZ);
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}
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static int get_meminfo(char * buffer)
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{
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struct sysinfo i;
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si_meminfo(&i);
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si_swapinfo(&i);
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return sprintf(buffer, " total: used: free: shared: buffers:\n"
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"Mem: %8lu %8lu %8lu %8lu %8lu\n"
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"Swap: %8lu %8lu %8lu\n",
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i.totalram, i.totalram-i.freeram, i.freeram, i.sharedram, i.bufferram,
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i.totalswap, i.totalswap-i.freeswap, i.freeswap);
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}
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static int get_version(char * buffer)
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{
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extern char *linux_banner;
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strcpy(buffer, linux_banner);
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return strlen(buffer);
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}
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static struct task_struct ** get_task(pid_t pid)
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{
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struct task_struct ** p;
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p = task;
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while (++p < task+NR_TASKS) {
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if (*p && (*p)->pid == pid)
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return p;
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}
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return NULL;
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}
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static unsigned long get_phys_addr(struct task_struct ** p, unsigned long ptr)
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{
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unsigned long page;
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if (!p || !*p || ptr >= TASK_SIZE)
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return 0;
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page = *PAGE_DIR_OFFSET((*p)->tss.cr3,ptr);
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if (!(page & 1))
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return 0;
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page &= PAGE_MASK;
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page += PAGE_PTR(ptr);
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page = *(unsigned long *) page;
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if (!(page & 1))
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return 0;
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page &= PAGE_MASK;
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page += ptr & ~PAGE_MASK;
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return page;
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}
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static int get_array(struct task_struct ** p, unsigned long start, unsigned long end, char * buffer)
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{
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unsigned long addr;
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int size = 0, result = 0;
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char c;
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if (start >= end)
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return result;
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for (;;) {
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addr = get_phys_addr(p, start);
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if (!addr)
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return result;
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do {
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c = *(char *) addr;
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if (!c)
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result = size;
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if (size < PAGE_SIZE)
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buffer[size++] = c;
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else
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return result;
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addr++;
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start++;
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if (start >= end)
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return result;
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} while (!(addr & ~PAGE_MASK));
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}
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}
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static int get_env(int pid, char * buffer)
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{
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struct task_struct ** p = get_task(pid);
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if (!p || !*p)
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return 0;
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return get_array(p, (*p)->env_start, (*p)->env_end, buffer);
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}
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static int get_arg(int pid, char * buffer)
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{
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struct task_struct ** p = get_task(pid);
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if (!p || !*p)
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return 0;
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return get_array(p, (*p)->arg_start, (*p)->arg_end, buffer);
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}
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static unsigned long get_wchan(struct task_struct *p)
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{
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unsigned long ebp, eip;
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unsigned long stack_page;
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int count = 0;
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if (!p || p == current || p->state == TASK_RUNNING)
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return 0;
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stack_page = p->kernel_stack_page;
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if (!stack_page)
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return 0;
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ebp = p->tss.ebp;
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do {
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if (ebp < stack_page || ebp >= 4092+stack_page)
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return 0;
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eip = *(unsigned long *) (ebp+4);
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if ((void *)eip != sleep_on &&
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(void *)eip != interruptible_sleep_on)
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return eip;
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ebp = *(unsigned long *) ebp;
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} while (count++ < 16);
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return 0;
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}
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#define KSTK_EIP(stack) (((unsigned long *)stack)[1019])
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#define KSTK_ESP(stack) (((unsigned long *)stack)[1022])
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static int get_stat(int pid, char * buffer)
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{
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struct task_struct ** p = get_task(pid);
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unsigned long sigignore=0, sigcatch=0, bit=1, wchan;
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unsigned long vsize, eip, esp;
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int i,tty_pgrp;
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char state;
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if (!p || !*p)
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return 0;
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if ((*p)->state < 0 || (*p)->state > 5)
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state = '.';
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else
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state = "RSDZTD"[(*p)->state];
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eip = esp = 0;
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vsize = (*p)->kernel_stack_page;
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if (vsize) {
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eip = KSTK_EIP(vsize);
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esp = KSTK_ESP(vsize);
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vsize = (*p)->brk - (*p)->start_code + PAGE_SIZE-1;
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if (esp)
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vsize += TASK_SIZE - esp;
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}
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wchan = get_wchan(*p);
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for(i=0; i<32; ++i) {
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switch((int) (*p)->sigaction[i].sa_handler) {
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case 1: sigignore |= bit; break;
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case 0: break;
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default: sigcatch |= bit;
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} bit <<= 1;
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}
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tty_pgrp = (*p)->tty;
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if (tty_pgrp > 0 && tty_table[tty_pgrp])
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tty_pgrp = tty_table[tty_pgrp]->pgrp;
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else
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tty_pgrp = -1;
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return sprintf(buffer,"%d (%s) %c %d %d %d %d %d %lu %lu \
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%lu %lu %lu %ld %ld %ld %ld %ld %ld %lu %lu %ld %lu %u %u %lu %lu %lu %lu %lu %lu \
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%lu %lu %lu %lu\n",
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pid,
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(*p)->comm,
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state,
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(*p)->p_pptr->pid,
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(*p)->pgrp,
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(*p)->session,
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(*p)->tty,
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tty_pgrp,
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(*p)->flags,
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(*p)->min_flt,
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(*p)->cmin_flt,
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(*p)->maj_flt,
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(*p)->cmaj_flt,
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(*p)->utime,
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(*p)->stime,
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(*p)->cutime,
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(*p)->cstime,
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(*p)->counter, /* this is the kernel priority ---
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subtract 30 in your user-level program. */
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(*p)->priority, /* this is the nice value ---
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subtract 15 in your user-level program. */
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(*p)->timeout,
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(*p)->it_real_value,
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(*p)->start_time,
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vsize,
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(*p)->rss, /* you might want to shift this left 3 */
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(*p)->rlim[RLIMIT_RSS].rlim_cur,
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(*p)->start_code,
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(*p)->end_code,
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(*p)->start_stack,
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esp,
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eip,
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(*p)->signal,
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(*p)->blocked,
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sigignore,
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sigcatch,
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wchan);
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}
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static int get_statm(int pid, char * buffer)
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{
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struct task_struct ** p = get_task(pid);
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int i, tpag;
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int size=0, resident=0, share=0, trs=0, lrs=0, drs=0, dt=0;
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unsigned long ptbl, *buf, *pte, *pagedir, map_nr;
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if (!p || !*p)
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return 0;
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tpag = (*p)->end_code / PAGE_SIZE;
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if ((*p)->state != TASK_ZOMBIE) {
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pagedir = (unsigned long *) (*p)->tss.cr3;
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for (i = 0; i < 0x300; ++i) {
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if ((ptbl = pagedir[i]) == 0) {
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tpag -= PTRS_PER_PAGE;
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continue;
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}
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buf = (unsigned long *)(ptbl & PAGE_MASK);
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for (pte = buf; pte < (buf + PTRS_PER_PAGE); ++pte) {
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if (*pte != 0) {
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++size;
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if (*pte & 1) {
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++resident;
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if (tpag > 0)
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++trs;
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else
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++drs;
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if (i >= 15 && i < 0x2f0) {
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++lrs;
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if (*pte & 0x40)
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++dt;
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else
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--drs;
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}
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map_nr = MAP_NR(*pte);
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if (map_nr < (high_memory / PAGE_SIZE) && mem_map[map_nr] > 1)
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++share;
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}
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}
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--tpag;
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}
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}
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}
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return sprintf(buffer,"%d %d %d %d %d %d %d\n",
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size, resident, share, trs, lrs, drs, dt);
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}
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static int get_maps(int pid, char *buf)
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{
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int sz = 0;
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struct task_struct **p = get_task(pid);
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struct vm_area_struct *map;
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if (!p || !*p)
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return 0;
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for(map = (*p)->mmap; map != NULL; map = map->vm_next) {
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char str[7], *cp = str;
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int prot = map->vm_page_prot;
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int perms, flags;
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int end = sz + 80; /* Length of line */
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dev_t dev;
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unsigned long ino;
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/*
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* This tries to get an "rwxsp" string out of silly
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* intel page permissions. The vm_area_struct should
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* probably have the original mmap args preserved.
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*/
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flags = perms = 0;
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if ((prot & PAGE_READONLY) == PAGE_READONLY)
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perms |= PROT_READ | PROT_EXEC;
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if (prot & (PAGE_COW|PAGE_RW)) {
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perms |= PROT_WRITE | PROT_READ;
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flags = prot & PAGE_COW ? MAP_PRIVATE : MAP_SHARED;
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}
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*cp++ = perms & PROT_READ ? 'r' : '-';
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*cp++ = perms & PROT_WRITE ? 'w' : '-';
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*cp++ = perms & PROT_EXEC ? 'x' : '-';
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*cp++ = flags & MAP_SHARED ? 's' : '-';
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*cp++ = flags & MAP_PRIVATE ? 'p' : '-';
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*cp++ = 0;
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if (end >= PAGE_SIZE) {
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sprintf(buf+sz, "...\n");
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break;
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}
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if (map->vm_inode != NULL) {
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dev = map->vm_inode->i_dev;
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ino = map->vm_inode->i_ino;
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} else {
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dev = 0;
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ino = 0;
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}
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sz += sprintf(buf+sz, "%08lx-%08lx %s %08lx %02x:%02x %lu\n",
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map->vm_start, map->vm_end, str, map->vm_offset,
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MAJOR(dev),MINOR(dev), ino);
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if (sz > end) {
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printk("get_maps: end(%d) < sz(%d)\n", end, sz);
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break;
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}
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}
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return sz;
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}
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asmlinkage int get_module_list( char *);
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static int array_read(struct inode * inode, struct file * file,char * buf, int count)
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{
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char * page;
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int length;
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int end;
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unsigned int type, pid;
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if (count < 0)
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return -EINVAL;
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if (!(page = (char*) __get_free_page(GFP_KERNEL)))
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return -ENOMEM;
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type = inode->i_ino;
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pid = type >> 16;
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type &= 0x0000ffff;
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switch (type) {
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case 2:
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length = get_loadavg(page);
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break;
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case 3:
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length = get_uptime(page);
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break;
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case 4:
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length = get_meminfo(page);
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break;
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case 6:
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length = get_version(page);
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break;
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case 9:
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length = get_env(pid, page);
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break;
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case 10:
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length = get_arg(pid, page);
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break;
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case 11:
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length = get_stat(pid, page);
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break;
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case 12:
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length = get_statm(pid, page);
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break;
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#ifdef CONFIG_DEBUG_MALLOC
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case 13:
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length = get_malloc(page);
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break;
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#endif
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case 14:
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free_page((unsigned long) page);
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return read_core(inode, file, buf, count);
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case 15:
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length = get_maps(pid, page);
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break;
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case 16:
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length = get_module_list(page);
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break;
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case 17:
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length = get_kstat(page);
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break;
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default:
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free_page((unsigned long) page);
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return -EBADF;
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}
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if (file->f_pos >= length) {
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free_page((unsigned long) page);
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return 0;
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}
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if (count + file->f_pos > length)
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count = length - file->f_pos;
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end = count + file->f_pos;
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memcpy_tofs(buf, page + file->f_pos, count);
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free_page((unsigned long) page);
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file->f_pos = end;
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return count;
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}
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static struct file_operations proc_array_operations = {
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NULL, /* array_lseek */
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array_read,
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NULL, /* array_write */
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NULL, /* array_readdir */
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NULL, /* array_select */
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NULL, /* array_ioctl */
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NULL, /* mmap */
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NULL, /* no special open code */
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NULL, /* no special release code */
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NULL /* can't fsync */
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};
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struct inode_operations proc_array_inode_operations = {
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&proc_array_operations, /* default base directory file-ops */
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NULL, /* create */
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NULL, /* lookup */
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NULL, /* link */
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NULL, /* unlink */
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NULL, /* symlink */
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NULL, /* mkdir */
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|
NULL, /* rmdir */
|
|
NULL, /* mknod */
|
|
NULL, /* rename */
|
|
NULL, /* readlink */
|
|
NULL, /* follow_link */
|
|
NULL, /* bmap */
|
|
NULL, /* truncate */
|
|
NULL /* permission */
|
|
};
|