478 lines
11 KiB
C
478 lines
11 KiB
C
#include <linux/mm.h>
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#include <linux/hugetlb.h>
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#include <linux/mount.h>
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#include <linux/seq_file.h>
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#include <linux/highmem.h>
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#include <linux/pagemap.h>
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#include <linux/mempolicy.h>
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#include <asm/elf.h>
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#include <asm/uaccess.h>
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#include <asm/tlbflush.h>
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#include "internal.h"
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char *task_mem(struct mm_struct *mm, char *buffer)
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{
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unsigned long data, text, lib;
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unsigned long hiwater_vm, total_vm, hiwater_rss, total_rss;
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/*
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* Note: to minimize their overhead, mm maintains hiwater_vm and
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* hiwater_rss only when about to *lower* total_vm or rss. Any
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* collector of these hiwater stats must therefore get total_vm
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* and rss too, which will usually be the higher. Barriers? not
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* worth the effort, such snapshots can always be inconsistent.
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*/
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hiwater_vm = total_vm = mm->total_vm;
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if (hiwater_vm < mm->hiwater_vm)
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hiwater_vm = mm->hiwater_vm;
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hiwater_rss = total_rss = get_mm_rss(mm);
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if (hiwater_rss < mm->hiwater_rss)
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hiwater_rss = mm->hiwater_rss;
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data = mm->total_vm - mm->shared_vm - mm->stack_vm;
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text = (PAGE_ALIGN(mm->end_code) - (mm->start_code & PAGE_MASK)) >> 10;
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lib = (mm->exec_vm << (PAGE_SHIFT-10)) - text;
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buffer += sprintf(buffer,
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"VmPeak:\t%8lu kB\n"
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"VmSize:\t%8lu kB\n"
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"VmLck:\t%8lu kB\n"
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"VmHWM:\t%8lu kB\n"
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"VmRSS:\t%8lu kB\n"
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"VmData:\t%8lu kB\n"
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"VmStk:\t%8lu kB\n"
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"VmExe:\t%8lu kB\n"
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"VmLib:\t%8lu kB\n"
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"VmPTE:\t%8lu kB\n",
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hiwater_vm << (PAGE_SHIFT-10),
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(total_vm - mm->reserved_vm) << (PAGE_SHIFT-10),
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mm->locked_vm << (PAGE_SHIFT-10),
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hiwater_rss << (PAGE_SHIFT-10),
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total_rss << (PAGE_SHIFT-10),
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data << (PAGE_SHIFT-10),
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mm->stack_vm << (PAGE_SHIFT-10), text, lib,
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(PTRS_PER_PTE*sizeof(pte_t)*mm->nr_ptes) >> 10);
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return buffer;
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}
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unsigned long task_vsize(struct mm_struct *mm)
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{
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return PAGE_SIZE * mm->total_vm;
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}
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int task_statm(struct mm_struct *mm, int *shared, int *text,
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int *data, int *resident)
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{
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*shared = get_mm_counter(mm, file_rss);
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*text = (PAGE_ALIGN(mm->end_code) - (mm->start_code & PAGE_MASK))
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>> PAGE_SHIFT;
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*data = mm->total_vm - mm->shared_vm;
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*resident = *shared + get_mm_counter(mm, anon_rss);
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return mm->total_vm;
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}
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int proc_exe_link(struct inode *inode, struct dentry **dentry, struct vfsmount **mnt)
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{
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struct vm_area_struct * vma;
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int result = -ENOENT;
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struct task_struct *task = get_proc_task(inode);
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struct mm_struct * mm = NULL;
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if (task) {
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mm = get_task_mm(task);
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put_task_struct(task);
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}
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if (!mm)
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goto out;
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down_read(&mm->mmap_sem);
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vma = mm->mmap;
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while (vma) {
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if ((vma->vm_flags & VM_EXECUTABLE) && vma->vm_file)
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break;
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vma = vma->vm_next;
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}
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if (vma) {
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*mnt = mntget(vma->vm_file->f_vfsmnt);
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*dentry = dget(vma->vm_file->f_dentry);
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result = 0;
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}
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up_read(&mm->mmap_sem);
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mmput(mm);
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out:
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return result;
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}
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static void pad_len_spaces(struct seq_file *m, int len)
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{
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len = 25 + sizeof(void*) * 6 - len;
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if (len < 1)
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len = 1;
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seq_printf(m, "%*c", len, ' ');
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}
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struct mem_size_stats
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{
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unsigned long resident;
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unsigned long shared_clean;
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unsigned long shared_dirty;
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unsigned long private_clean;
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unsigned long private_dirty;
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};
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static int show_map_internal(struct seq_file *m, void *v, struct mem_size_stats *mss)
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{
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struct proc_maps_private *priv = m->private;
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struct task_struct *task = priv->task;
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struct vm_area_struct *vma = v;
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struct mm_struct *mm = vma->vm_mm;
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struct file *file = vma->vm_file;
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int flags = vma->vm_flags;
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unsigned long ino = 0;
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dev_t dev = 0;
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int len;
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if (file) {
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struct inode *inode = vma->vm_file->f_dentry->d_inode;
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dev = inode->i_sb->s_dev;
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ino = inode->i_ino;
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}
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seq_printf(m, "%08lx-%08lx %c%c%c%c %08lx %02x:%02x %lu %n",
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vma->vm_start,
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vma->vm_end,
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flags & VM_READ ? 'r' : '-',
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flags & VM_WRITE ? 'w' : '-',
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flags & VM_EXEC ? 'x' : '-',
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flags & VM_MAYSHARE ? 's' : 'p',
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vma->vm_pgoff << PAGE_SHIFT,
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MAJOR(dev), MINOR(dev), ino, &len);
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/*
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* Print the dentry name for named mappings, and a
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* special [heap] marker for the heap:
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*/
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if (file) {
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pad_len_spaces(m, len);
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seq_path(m, file->f_vfsmnt, file->f_dentry, "\n");
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} else {
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const char *name = arch_vma_name(vma);
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if (!name) {
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if (mm) {
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if (vma->vm_start <= mm->start_brk &&
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vma->vm_end >= mm->brk) {
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name = "[heap]";
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} else if (vma->vm_start <= mm->start_stack &&
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vma->vm_end >= mm->start_stack) {
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name = "[stack]";
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}
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} else {
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name = "[vdso]";
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}
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}
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if (name) {
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pad_len_spaces(m, len);
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seq_puts(m, name);
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}
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}
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seq_putc(m, '\n');
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if (mss)
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seq_printf(m,
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"Size: %8lu kB\n"
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"Rss: %8lu kB\n"
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"Shared_Clean: %8lu kB\n"
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"Shared_Dirty: %8lu kB\n"
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"Private_Clean: %8lu kB\n"
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"Private_Dirty: %8lu kB\n",
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(vma->vm_end - vma->vm_start) >> 10,
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mss->resident >> 10,
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mss->shared_clean >> 10,
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mss->shared_dirty >> 10,
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mss->private_clean >> 10,
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mss->private_dirty >> 10);
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if (m->count < m->size) /* vma is copied successfully */
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m->version = (vma != get_gate_vma(task))? vma->vm_start: 0;
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return 0;
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}
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static int show_map(struct seq_file *m, void *v)
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{
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return show_map_internal(m, v, NULL);
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}
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static void smaps_pte_range(struct vm_area_struct *vma, pmd_t *pmd,
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unsigned long addr, unsigned long end,
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struct mem_size_stats *mss)
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{
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pte_t *pte, ptent;
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spinlock_t *ptl;
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struct page *page;
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pte = pte_offset_map_lock(vma->vm_mm, pmd, addr, &ptl);
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do {
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ptent = *pte;
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if (!pte_present(ptent))
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continue;
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mss->resident += PAGE_SIZE;
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page = vm_normal_page(vma, addr, ptent);
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if (!page)
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continue;
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if (page_mapcount(page) >= 2) {
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if (pte_dirty(ptent))
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mss->shared_dirty += PAGE_SIZE;
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else
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mss->shared_clean += PAGE_SIZE;
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} else {
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if (pte_dirty(ptent))
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mss->private_dirty += PAGE_SIZE;
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else
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mss->private_clean += PAGE_SIZE;
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}
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} while (pte++, addr += PAGE_SIZE, addr != end);
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pte_unmap_unlock(pte - 1, ptl);
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cond_resched();
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}
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static inline void smaps_pmd_range(struct vm_area_struct *vma, pud_t *pud,
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unsigned long addr, unsigned long end,
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struct mem_size_stats *mss)
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{
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pmd_t *pmd;
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unsigned long next;
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pmd = pmd_offset(pud, addr);
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do {
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next = pmd_addr_end(addr, end);
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if (pmd_none_or_clear_bad(pmd))
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continue;
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smaps_pte_range(vma, pmd, addr, next, mss);
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} while (pmd++, addr = next, addr != end);
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}
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static inline void smaps_pud_range(struct vm_area_struct *vma, pgd_t *pgd,
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unsigned long addr, unsigned long end,
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struct mem_size_stats *mss)
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{
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pud_t *pud;
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unsigned long next;
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pud = pud_offset(pgd, addr);
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do {
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next = pud_addr_end(addr, end);
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if (pud_none_or_clear_bad(pud))
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continue;
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smaps_pmd_range(vma, pud, addr, next, mss);
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} while (pud++, addr = next, addr != end);
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}
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static inline void smaps_pgd_range(struct vm_area_struct *vma,
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unsigned long addr, unsigned long end,
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struct mem_size_stats *mss)
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{
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pgd_t *pgd;
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unsigned long next;
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pgd = pgd_offset(vma->vm_mm, addr);
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do {
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next = pgd_addr_end(addr, end);
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if (pgd_none_or_clear_bad(pgd))
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continue;
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smaps_pud_range(vma, pgd, addr, next, mss);
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} while (pgd++, addr = next, addr != end);
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}
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static int show_smap(struct seq_file *m, void *v)
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{
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struct vm_area_struct *vma = v;
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struct mem_size_stats mss;
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memset(&mss, 0, sizeof mss);
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if (vma->vm_mm && !is_vm_hugetlb_page(vma))
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smaps_pgd_range(vma, vma->vm_start, vma->vm_end, &mss);
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return show_map_internal(m, v, &mss);
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}
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static void *m_start(struct seq_file *m, loff_t *pos)
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{
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struct proc_maps_private *priv = m->private;
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unsigned long last_addr = m->version;
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struct mm_struct *mm;
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struct vm_area_struct *vma, *tail_vma = NULL;
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loff_t l = *pos;
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/* Clear the per syscall fields in priv */
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priv->task = NULL;
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priv->tail_vma = NULL;
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/*
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* We remember last_addr rather than next_addr to hit with
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* mmap_cache most of the time. We have zero last_addr at
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* the beginning and also after lseek. We will have -1 last_addr
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* after the end of the vmas.
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*/
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if (last_addr == -1UL)
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return NULL;
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priv->task = get_pid_task(priv->pid, PIDTYPE_PID);
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if (!priv->task)
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return NULL;
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mm = get_task_mm(priv->task);
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if (!mm)
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return NULL;
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priv->tail_vma = tail_vma = get_gate_vma(priv->task);
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down_read(&mm->mmap_sem);
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/* Start with last addr hint */
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if (last_addr && (vma = find_vma(mm, last_addr))) {
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vma = vma->vm_next;
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goto out;
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}
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/*
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* Check the vma index is within the range and do
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* sequential scan until m_index.
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*/
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vma = NULL;
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if ((unsigned long)l < mm->map_count) {
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vma = mm->mmap;
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while (l-- && vma)
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vma = vma->vm_next;
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goto out;
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}
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if (l != mm->map_count)
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tail_vma = NULL; /* After gate vma */
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out:
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if (vma)
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return vma;
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/* End of vmas has been reached */
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m->version = (tail_vma != NULL)? 0: -1UL;
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up_read(&mm->mmap_sem);
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mmput(mm);
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return tail_vma;
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}
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static void vma_stop(struct proc_maps_private *priv, struct vm_area_struct *vma)
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{
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if (vma && vma != priv->tail_vma) {
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struct mm_struct *mm = vma->vm_mm;
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up_read(&mm->mmap_sem);
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mmput(mm);
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}
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}
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static void *m_next(struct seq_file *m, void *v, loff_t *pos)
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{
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struct proc_maps_private *priv = m->private;
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struct vm_area_struct *vma = v;
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struct vm_area_struct *tail_vma = priv->tail_vma;
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(*pos)++;
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if (vma && (vma != tail_vma) && vma->vm_next)
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return vma->vm_next;
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vma_stop(priv, vma);
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return (vma != tail_vma)? tail_vma: NULL;
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}
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static void m_stop(struct seq_file *m, void *v)
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{
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struct proc_maps_private *priv = m->private;
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struct vm_area_struct *vma = v;
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vma_stop(priv, vma);
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if (priv->task)
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put_task_struct(priv->task);
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}
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static struct seq_operations proc_pid_maps_op = {
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.start = m_start,
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.next = m_next,
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.stop = m_stop,
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.show = show_map
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};
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static struct seq_operations proc_pid_smaps_op = {
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.start = m_start,
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.next = m_next,
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.stop = m_stop,
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.show = show_smap
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};
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static int do_maps_open(struct inode *inode, struct file *file,
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struct seq_operations *ops)
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{
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struct proc_maps_private *priv;
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int ret = -ENOMEM;
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priv = kzalloc(sizeof(*priv), GFP_KERNEL);
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if (priv) {
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priv->pid = proc_pid(inode);
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ret = seq_open(file, ops);
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if (!ret) {
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struct seq_file *m = file->private_data;
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m->private = priv;
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} else {
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kfree(priv);
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}
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}
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return ret;
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}
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static int maps_open(struct inode *inode, struct file *file)
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{
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return do_maps_open(inode, file, &proc_pid_maps_op);
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}
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struct file_operations proc_maps_operations = {
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.open = maps_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = seq_release_private,
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};
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#ifdef CONFIG_NUMA
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extern int show_numa_map(struct seq_file *m, void *v);
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static struct seq_operations proc_pid_numa_maps_op = {
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.start = m_start,
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.next = m_next,
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.stop = m_stop,
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.show = show_numa_map
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};
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static int numa_maps_open(struct inode *inode, struct file *file)
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{
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return do_maps_open(inode, file, &proc_pid_numa_maps_op);
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}
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struct file_operations proc_numa_maps_operations = {
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.open = numa_maps_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = seq_release_private,
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};
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#endif
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static int smaps_open(struct inode *inode, struct file *file)
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{
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return do_maps_open(inode, file, &proc_pid_smaps_op);
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}
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struct file_operations proc_smaps_operations = {
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.open = smaps_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = seq_release_private,
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};
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