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-rw-r--r--fs/proc/array.c598
1 files changed, 598 insertions, 0 deletions
diff --git a/fs/proc/array.c b/fs/proc/array.c
new file mode 100644
index 000000000..6fd7bccbe
--- /dev/null
+++ b/fs/proc/array.c
@@ -0,0 +1,598 @@
+/*
+ * linux/fs/proc/array.c
+ *
+ * Copyright (C) 1992 by Linus Torvalds
+ * based on ideas by Darren Senn
+ *
+ * Fixes:
+ * Michael. K. Johnson: stat,statm extensions.
+ * <johnsonm@stolaf.edu>
+ *
+ * Pauline Middelink : Made cmdline,envline only break at '\0's, to
+ * make sure SET_PROCTITLE works. Also removed
+ * bad '!' which forced address recalculation for
+ * EVERY character on the current page.
+ * <middelin@polyware.iaf.nl>
+ */
+
+#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 <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 struct file_operations proc_kcore_operations = {
+ NULL, /* lseek */
+ read_core,
+};
+
+struct inode_operations proc_kcore_inode_operations = {
+ &proc_kcore_operations,
+};
+
+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)
+{
+ int i, len;
+ unsigned sum = 0;
+
+ for (i = 0 ; i < 16 ; i++)
+ sum += kstat.interrupts[i];
+ len = sprintf(buffer,
+ "cpu %u %u %u %lu\n"
+ "disk %u %u %u %u\n"
+ "page %u %u\n"
+ "swap %u %u\n"
+ "intr %u",
+ 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,
+ sum);
+ for (i = 0 ; i < 16 ; i++)
+ len += sprintf(buffer + len, " %u", kstat.interrupts[i]);
+ len += sprintf(buffer + len,
+ "\nctxt %u\n"
+ "btime %lu\n",
+ kstat.context_swtch,
+ xtime.tv_sec - jiffies / HZ);
+ return len;
+}
+
+
+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 & PAGE_PRESENT))
+ return 0;
+ page &= PAGE_MASK;
+ page += PAGE_PTR(ptr);
+ page = *(unsigned long *) page;
+ if (!(page & PAGE_PRESENT))
+ 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)
+ goto ready;
+ do {
+ c = *(char *) addr;
+ if (!c)
+ result = size;
+ if (size < PAGE_SIZE)
+ buffer[size++] = c;
+ else
+ goto ready;
+ addr++;
+ start++;
+ if (!c && start >= end)
+ goto ready;
+ } while (addr & ~PAGE_MASK);
+ }
+ready:
+ /* remove the trailing blanks, used to fill out argv,envp space */
+ while (result>0 && buffer[result-1]==' ')
+ result--;
+ return result;
+}
+
+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)->mm->env_start, (*p)->mm->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)->mm->arg_start, (*p)->mm->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)->mm->brk - (*p)->mm->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;
+ }
+ if ((*p)->tty)
+ tty_pgrp = (*p)->tty->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 %lu %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 ? (*p)->tty->device : 0,
+ tty_pgrp,
+ (*p)->flags,
+ (*p)->mm->min_flt,
+ (*p)->mm->cmin_flt,
+ (*p)->mm->maj_flt,
+ (*p)->mm->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)->mm->rss, /* you might want to shift this left 3 */
+ (*p)->rlim[RLIMIT_RSS].rlim_cur,
+ (*p)->mm->start_code,
+ (*p)->mm->end_code,
+ (*p)->mm->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)->mm->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)->mm->mmap; map != NULL; map = map->vm_next) {
+ char str[7], *cp = str;
+ int flags;
+ int end = sz + 80; /* Length of line */
+ dev_t dev;
+ unsigned long ino;
+
+ flags = map->vm_flags;
+
+ *cp++ = flags & VM_READ ? 'r' : '-';
+ *cp++ = flags & VM_WRITE ? 'w' : '-';
+ *cp++ = flags & VM_EXEC ? 'x' : '-';
+ *cp++ = flags & VM_SHARED ? 's' : '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 *);
+extern int get_device_list(char *);
+extern int get_filesystem_list(char *);
+extern int get_ksyms_list(char *);
+extern int get_irq_list(char *);
+extern int get_dma_list(char *);
+
+static int get_root_array(char * page, int type)
+{
+ switch (type) {
+ case PROC_LOADAVG:
+ return get_loadavg(page);
+
+ case PROC_UPTIME:
+ return get_uptime(page);
+
+ case PROC_MEMINFO:
+ return get_meminfo(page);
+
+ case PROC_VERSION:
+ return get_version(page);
+
+#ifdef CONFIG_DEBUG_MALLOC
+ case PROC_MALLOC:
+ return get_malloc(page);
+#endif
+
+ case PROC_MODULES:
+ return get_module_list(page);
+
+ case PROC_STAT:
+ return get_kstat(page);
+
+ case PROC_DEVICES:
+ return get_device_list(page);
+
+ case PROC_INTERRUPTS:
+ return get_irq_list(page);
+
+ case PROC_FILESYSTEMS:
+ return get_filesystem_list(page);
+
+ case PROC_KSYMS:
+ return get_ksyms_list(page);
+
+ case PROC_DMA:
+ return get_dma_list(page);
+ }
+ return -EBADF;
+}
+
+static int get_process_array(char * page, int pid, int type)
+{
+ switch (type) {
+ case PROC_PID_ENVIRON:
+ return get_env(pid, page);
+ case PROC_PID_CMDLINE:
+ return get_arg(pid, page);
+ case PROC_PID_STAT:
+ return get_stat(pid, page);
+ case PROC_PID_STATM:
+ return get_statm(pid, page);
+ case PROC_PID_MAPS:
+ return get_maps(pid, page);
+ }
+ return -EBADF;
+}
+
+
+static inline int fill_array(char * page, int pid, int type)
+{
+ if (pid)
+ return get_process_array(page, pid, type);
+ return get_root_array(page, type);
+}
+
+static int array_read(struct inode * inode, struct file * file,char * buf, int count)
+{
+ unsigned long page;
+ int length;
+ int end;
+ unsigned int type, pid;
+
+ if (count < 0)
+ return -EINVAL;
+ if (!(page = __get_free_page(GFP_KERNEL)))
+ return -ENOMEM;
+ type = inode->i_ino;
+ pid = type >> 16;
+ type &= 0x0000ffff;
+ length = fill_array((char *) page, pid, type);
+ if (length < 0) {
+ free_page(page);
+ return length;
+ }
+ if (file->f_pos >= length) {
+ free_page(page);
+ return 0;
+ }
+ if (count + file->f_pos > length)
+ count = length - file->f_pos;
+ end = count + file->f_pos;
+ memcpy_tofs(buf, (char *) page + file->f_pos, count);
+ free_page(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 */
+};
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