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