Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

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 000000000000..28b4a0253a92
--- /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
+};