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-rw-r--r--fs/proc/task_mmu.c235
1 files changed, 235 insertions, 0 deletions
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
new file mode 100644
index 0000000..28b4a02
--- /dev/null
+++ b/fs/proc/task_mmu.c
@@ -0,0 +1,235 @@
+#include <linux/mm.h>
+#include <linux/hugetlb.h>
+#include <linux/mount.h>
+#include <linux/seq_file.h>
+#include <asm/elf.h>
+#include <asm/uaccess.h>
+#include "internal.h"
+
+char *task_mem(struct mm_struct *mm, char *buffer)
+{
+ unsigned long data, text, lib;
+
+ data = mm->total_vm - mm->shared_vm - mm->stack_vm;
+ text = (PAGE_ALIGN(mm->end_code) - (mm->start_code & PAGE_MASK)) >> 10;
+ lib = (mm->exec_vm << (PAGE_SHIFT-10)) - text;
+ buffer += sprintf(buffer,
+ "VmSize:\t%8lu kB\n"
+ "VmLck:\t%8lu kB\n"
+ "VmRSS:\t%8lu kB\n"
+ "VmData:\t%8lu kB\n"
+ "VmStk:\t%8lu kB\n"
+ "VmExe:\t%8lu kB\n"
+ "VmLib:\t%8lu kB\n"
+ "VmPTE:\t%8lu kB\n",
+ (mm->total_vm - mm->reserved_vm) << (PAGE_SHIFT-10),
+ mm->locked_vm << (PAGE_SHIFT-10),
+ get_mm_counter(mm, rss) << (PAGE_SHIFT-10),
+ data << (PAGE_SHIFT-10),
+ mm->stack_vm << (PAGE_SHIFT-10), text, lib,
+ (PTRS_PER_PTE*sizeof(pte_t)*mm->nr_ptes) >> 10);
+ return buffer;
+}
+
+unsigned long task_vsize(struct mm_struct *mm)
+{
+ return PAGE_SIZE * mm->total_vm;
+}
+
+int task_statm(struct mm_struct *mm, int *shared, int *text,
+ int *data, int *resident)
+{
+ int rss = get_mm_counter(mm, rss);
+
+ *shared = rss - get_mm_counter(mm, anon_rss);
+ *text = (PAGE_ALIGN(mm->end_code) - (mm->start_code & PAGE_MASK))
+ >> PAGE_SHIFT;
+ *data = mm->total_vm - mm->shared_vm;
+ *resident = rss;
+ return mm->total_vm;
+}
+
+int proc_exe_link(struct inode *inode, struct dentry **dentry, struct vfsmount **mnt)
+{
+ struct vm_area_struct * vma;
+ int result = -ENOENT;
+ struct task_struct *task = proc_task(inode);
+ struct mm_struct * mm = get_task_mm(task);
+
+ if (!mm)
+ goto out;
+ down_read(&mm->mmap_sem);
+
+ vma = mm->mmap;
+ while (vma) {
+ if ((vma->vm_flags & VM_EXECUTABLE) && vma->vm_file)
+ break;
+ vma = vma->vm_next;
+ }
+
+ if (vma) {
+ *mnt = mntget(vma->vm_file->f_vfsmnt);
+ *dentry = dget(vma->vm_file->f_dentry);
+ result = 0;
+ }
+
+ up_read(&mm->mmap_sem);
+ mmput(mm);
+out:
+ return result;
+}
+
+static void pad_len_spaces(struct seq_file *m, int len)
+{
+ len = 25 + sizeof(void*) * 6 - len;
+ if (len < 1)
+ len = 1;
+ seq_printf(m, "%*c", len, ' ');
+}
+
+static int show_map(struct seq_file *m, void *v)
+{
+ struct task_struct *task = m->private;
+ struct vm_area_struct *map = v;
+ struct mm_struct *mm = map->vm_mm;
+ struct file *file = map->vm_file;
+ int flags = map->vm_flags;
+ unsigned long ino = 0;
+ dev_t dev = 0;
+ int len;
+
+ if (file) {
+ struct inode *inode = map->vm_file->f_dentry->d_inode;
+ dev = inode->i_sb->s_dev;
+ ino = inode->i_ino;
+ }
+
+ seq_printf(m, "%08lx-%08lx %c%c%c%c %08lx %02x:%02x %lu %n",
+ map->vm_start,
+ map->vm_end,
+ flags & VM_READ ? 'r' : '-',
+ flags & VM_WRITE ? 'w' : '-',
+ flags & VM_EXEC ? 'x' : '-',
+ flags & VM_MAYSHARE ? 's' : 'p',
+ map->vm_pgoff << PAGE_SHIFT,
+ MAJOR(dev), MINOR(dev), ino, &len);
+
+ /*
+ * Print the dentry name for named mappings, and a
+ * special [heap] marker for the heap:
+ */
+ if (map->vm_file) {
+ pad_len_spaces(m, len);
+ seq_path(m, file->f_vfsmnt, file->f_dentry, "");
+ } else {
+ if (mm) {
+ if (map->vm_start <= mm->start_brk &&
+ map->vm_end >= mm->brk) {
+ pad_len_spaces(m, len);
+ seq_puts(m, "[heap]");
+ } else {
+ if (map->vm_start <= mm->start_stack &&
+ map->vm_end >= mm->start_stack) {
+
+ pad_len_spaces(m, len);
+ seq_puts(m, "[stack]");
+ }
+ }
+ } else {
+ pad_len_spaces(m, len);
+ seq_puts(m, "[vdso]");
+ }
+ }
+ seq_putc(m, '\n');
+ if (m->count < m->size) /* map is copied successfully */
+ m->version = (map != get_gate_vma(task))? map->vm_start: 0;
+ return 0;
+}
+
+static void *m_start(struct seq_file *m, loff_t *pos)
+{
+ struct task_struct *task = m->private;
+ unsigned long last_addr = m->version;
+ struct mm_struct *mm;
+ struct vm_area_struct *map, *tail_map;
+ loff_t l = *pos;
+
+ /*
+ * We remember last_addr rather than next_addr to hit with
+ * mmap_cache most of the time. We have zero last_addr at
+ * the begining and also after lseek. We will have -1 last_addr
+ * after the end of the maps.
+ */
+
+ if (last_addr == -1UL)
+ return NULL;
+
+ mm = get_task_mm(task);
+ if (!mm)
+ return NULL;
+
+ tail_map = get_gate_vma(task);
+ down_read(&mm->mmap_sem);
+
+ /* Start with last addr hint */
+ if (last_addr && (map = find_vma(mm, last_addr))) {
+ map = map->vm_next;
+ goto out;
+ }
+
+ /*
+ * Check the map index is within the range and do
+ * sequential scan until m_index.
+ */
+ map = NULL;
+ if ((unsigned long)l < mm->map_count) {
+ map = mm->mmap;
+ while (l-- && map)
+ map = map->vm_next;
+ goto out;
+ }
+
+ if (l != mm->map_count)
+ tail_map = NULL; /* After gate map */
+
+out:
+ if (map)
+ return map;
+
+ /* End of maps has reached */
+ m->version = (tail_map != NULL)? 0: -1UL;
+ up_read(&mm->mmap_sem);
+ mmput(mm);
+ return tail_map;
+}
+
+static void m_stop(struct seq_file *m, void *v)
+{
+ struct task_struct *task = m->private;
+ struct vm_area_struct *map = v;
+ if (map && map != get_gate_vma(task)) {
+ struct mm_struct *mm = map->vm_mm;
+ up_read(&mm->mmap_sem);
+ mmput(mm);
+ }
+}
+
+static void *m_next(struct seq_file *m, void *v, loff_t *pos)
+{
+ struct task_struct *task = m->private;
+ struct vm_area_struct *map = v;
+ struct vm_area_struct *tail_map = get_gate_vma(task);
+
+ (*pos)++;
+ if (map && (map != tail_map) && map->vm_next)
+ return map->vm_next;
+ m_stop(m, v);
+ return (map != tail_map)? tail_map: NULL;
+}
+
+struct seq_operations proc_pid_maps_op = {
+ .start = m_start,
+ .next = m_next,
+ .stop = m_stop,
+ .show = show_map
+};
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