#include <linux/highmem.h>
#include <linux/ptrace.h>
#include <linux/pagemap.h>
-#include <linux/ptrace.h>
#include <linux/mempolicy.h>
#include <linux/swap.h>
#include <linux/swapops.h>
-#include <linux/seq_file.h>
#include <asm/elf.h>
#include <asm/uaccess.h>
return ret;
}
-static int show_map(struct seq_file *m, void *v)
+static void show_map_vma(struct seq_file *m, struct vm_area_struct *vma)
{
- struct proc_maps_private *priv = m->private;
- struct task_struct *task = priv->task;
- struct vm_area_struct *vma = v;
struct mm_struct *mm = vma->vm_mm;
struct file *file = vma->vm_file;
int flags = vma->vm_flags;
dev_t dev = 0;
int len;
- if (maps_protect && !ptrace_may_attach(task))
- return -EACCES;
-
if (file) {
struct inode *inode = vma->vm_file->f_path.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",
+ seq_printf(m, "%08lx-%08lx %c%c%c%c %08llx %02x:%02x %lu %n",
vma->vm_start,
vma->vm_end,
flags & VM_READ ? 'r' : '-',
flags & VM_WRITE ? 'w' : '-',
flags & VM_EXEC ? 'x' : '-',
flags & VM_MAYSHARE ? 's' : 'p',
- vma->vm_pgoff << PAGE_SHIFT,
+ ((loff_t)vma->vm_pgoff) << PAGE_SHIFT,
MAJOR(dev), MINOR(dev), ino, &len);
/*
}
}
seq_putc(m, '\n');
+}
+
+static int show_map(struct seq_file *m, void *v)
+{
+ struct vm_area_struct *vma = v;
+ struct proc_maps_private *priv = m->private;
+ struct task_struct *task = priv->task;
+
+ show_map_vma(m, vma);
if (m->count < m->size) /* vma is copied successfully */
m->version = (vma != get_gate_vma(task))? vma->vm_start: 0;
};
static int smaps_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end,
- void *private)
+ struct mm_walk *walk)
{
- struct mem_size_stats *mss = private;
+ struct mem_size_stats *mss = walk->private;
struct vm_area_struct *vma = mss->vma;
pte_t *pte, ptent;
spinlock_t *ptl;
return 0;
}
-static struct mm_walk smaps_walk = { .pmd_entry = smaps_pte_range };
-
static int show_smap(struct seq_file *m, void *v)
{
+ struct proc_maps_private *priv = m->private;
+ struct task_struct *task = priv->task;
struct vm_area_struct *vma = v;
struct mem_size_stats mss;
- int ret;
+ struct mm_walk smaps_walk = {
+ .pmd_entry = smaps_pte_range,
+ .mm = vma->vm_mm,
+ .private = &mss,
+ };
memset(&mss, 0, sizeof mss);
mss.vma = vma;
if (vma->vm_mm && !is_vm_hugetlb_page(vma))
- walk_page_range(vma->vm_mm, vma->vm_start, vma->vm_end,
- &smaps_walk, &mss);
+ walk_page_range(vma->vm_start, vma->vm_end, &smaps_walk);
- ret = show_map(m, v);
- if (ret)
- return ret;
+ show_map_vma(m, vma);
seq_printf(m,
"Size: %8lu kB\n"
mss.referenced >> 10,
mss.swap >> 10);
- return ret;
+ if (m->count < m->size) /* vma is copied successfully */
+ m->version = (vma != get_gate_vma(task)) ? vma->vm_start : 0;
+ return 0;
}
static const struct seq_operations proc_pid_smaps_op = {
};
static int clear_refs_pte_range(pmd_t *pmd, unsigned long addr,
- unsigned long end, void *private)
+ unsigned long end, struct mm_walk *walk)
{
- struct vm_area_struct *vma = private;
+ struct vm_area_struct *vma = walk->private;
pte_t *pte, ptent;
spinlock_t *ptl;
struct page *page;
return 0;
}
-static struct mm_walk clear_refs_walk = { .pmd_entry = clear_refs_pte_range };
-
static ssize_t clear_refs_write(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
return -ESRCH;
mm = get_task_mm(task);
if (mm) {
+ struct mm_walk clear_refs_walk = {
+ .pmd_entry = clear_refs_pte_range,
+ .mm = mm,
+ };
down_read(&mm->mmap_sem);
- for (vma = mm->mmap; vma; vma = vma->vm_next)
+ for (vma = mm->mmap; vma; vma = vma->vm_next) {
+ clear_refs_walk.private = vma;
if (!is_vm_hugetlb_page(vma))
- walk_page_range(mm, vma->vm_start, vma->vm_end,
- &clear_refs_walk, vma);
+ walk_page_range(vma->vm_start, vma->vm_end,
+ &clear_refs_walk);
+ }
flush_tlb_mm(mm);
up_read(&mm->mmap_sem);
mmput(mm);
};
struct pagemapread {
- char __user *out, *end;
+ u64 __user *out, *end;
};
#define PM_ENTRY_BYTES sizeof(u64)
static int add_to_pagemap(unsigned long addr, u64 pfn,
struct pagemapread *pm)
{
- /*
- * Make sure there's room in the buffer for an
- * entire entry. Otherwise, only copy part of
- * the pfn.
- */
- if (pm->out + PM_ENTRY_BYTES >= pm->end) {
- if (copy_to_user(pm->out, &pfn, pm->end - pm->out))
- return -EFAULT;
- pm->out = pm->end;
- return PM_END_OF_BUFFER;
- }
-
if (put_user(pfn, pm->out))
return -EFAULT;
- pm->out += PM_ENTRY_BYTES;
+ pm->out++;
+ if (pm->out >= pm->end)
+ return PM_END_OF_BUFFER;
return 0;
}
static int pagemap_pte_hole(unsigned long start, unsigned long end,
- void *private)
+ struct mm_walk *walk)
{
- struct pagemapread *pm = private;
+ struct pagemapread *pm = walk->private;
unsigned long addr;
int err = 0;
for (addr = start; addr < end; addr += PAGE_SIZE) {
return swp_type(e) | (swp_offset(e) << MAX_SWAPFILES_SHIFT);
}
+static unsigned long pte_to_pagemap_entry(pte_t pte)
+{
+ unsigned long pme = 0;
+ if (is_swap_pte(pte))
+ pme = PM_PFRAME(swap_pte_to_pagemap_entry(pte))
+ | PM_PSHIFT(PAGE_SHIFT) | PM_SWAP;
+ else if (pte_present(pte))
+ pme = PM_PFRAME(pte_pfn(pte))
+ | PM_PSHIFT(PAGE_SHIFT) | PM_PRESENT;
+ return pme;
+}
+
static int pagemap_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end,
- void *private)
+ struct mm_walk *walk)
{
- struct pagemapread *pm = private;
+ struct vm_area_struct *vma;
+ struct pagemapread *pm = walk->private;
pte_t *pte;
int err = 0;
+ /* find the first VMA at or above 'addr' */
+ vma = find_vma(walk->mm, addr);
for (; addr != end; addr += PAGE_SIZE) {
u64 pfn = PM_NOT_PRESENT;
- pte = pte_offset_map(pmd, addr);
- if (is_swap_pte(*pte))
- pfn = PM_PFRAME(swap_pte_to_pagemap_entry(*pte))
- | PM_PSHIFT(PAGE_SHIFT) | PM_SWAP;
- else if (pte_present(*pte))
- pfn = PM_PFRAME(pte_pfn(*pte))
- | PM_PSHIFT(PAGE_SHIFT) | PM_PRESENT;
- /* unmap so we're not in atomic when we copy to userspace */
- pte_unmap(pte);
+
+ /* check to see if we've left 'vma' behind
+ * and need a new, higher one */
+ if (vma && (addr >= vma->vm_end))
+ vma = find_vma(walk->mm, addr);
+
+ /* check that 'vma' actually covers this address,
+ * and that it isn't a huge page vma */
+ if (vma && (vma->vm_start <= addr) &&
+ !is_vm_hugetlb_page(vma)) {
+ pte = pte_offset_map(pmd, addr);
+ pfn = pte_to_pagemap_entry(*pte);
+ /* unmap before userspace copy */
+ pte_unmap(pte);
+ }
err = add_to_pagemap(addr, pfn, pm);
if (err)
return err;
return err;
}
-static struct mm_walk pagemap_walk = {
- .pmd_entry = pagemap_pte_range,
- .pte_hole = pagemap_pte_hole
-};
-
/*
* /proc/pid/pagemap - an array mapping virtual pages to pfns
*
struct pagemapread pm;
int pagecount;
int ret = -ESRCH;
+ struct mm_walk pagemap_walk = {};
+ unsigned long src;
+ unsigned long svpfn;
+ unsigned long start_vaddr;
+ unsigned long end_vaddr;
if (!task)
goto out;
ret = -EACCES;
- if (!ptrace_may_attach(task))
+ if (!ptrace_may_access(task, PTRACE_MODE_READ))
goto out_task;
ret = -EINVAL;
/* file position must be aligned */
- if (*ppos % PM_ENTRY_BYTES)
+ if ((*ppos % PM_ENTRY_BYTES) || (count % PM_ENTRY_BYTES))
goto out_task;
ret = 0;
if (!mm)
goto out_task;
- ret = -ENOMEM;
+
uaddr = (unsigned long)buf & PAGE_MASK;
uend = (unsigned long)(buf + count);
pagecount = (PAGE_ALIGN(uend) - uaddr) / PAGE_SIZE;
- pages = kmalloc(pagecount * sizeof(struct page *), GFP_KERNEL);
+ ret = 0;
+ if (pagecount == 0)
+ goto out_mm;
+ pages = kcalloc(pagecount, sizeof(struct page *), GFP_KERNEL);
+ ret = -ENOMEM;
if (!pages)
goto out_mm;
goto out_pages;
}
- pm.out = buf;
- pm.end = buf + count;
+ pm.out = (u64 *)buf;
+ pm.end = (u64 *)(buf + count);
- if (!ptrace_may_attach(task)) {
- ret = -EIO;
- } else {
- unsigned long src = *ppos;
- unsigned long svpfn = src / PM_ENTRY_BYTES;
- unsigned long start_vaddr = svpfn << PAGE_SHIFT;
- unsigned long end_vaddr = TASK_SIZE_OF(task);
-
- /* watch out for wraparound */
- if (svpfn > TASK_SIZE_OF(task) >> PAGE_SHIFT)
- start_vaddr = end_vaddr;
-
- /*
- * The odds are that this will stop walking way
- * before end_vaddr, because the length of the
- * user buffer is tracked in "pm", and the walk
- * will stop when we hit the end of the buffer.
- */
- ret = walk_page_range(mm, start_vaddr, end_vaddr,
- &pagemap_walk, &pm);
- if (ret == PM_END_OF_BUFFER)
- ret = 0;
- /* don't need mmap_sem for these, but this looks cleaner */
- *ppos += pm.out - buf;
- if (!ret)
- ret = pm.out - buf;
- }
+ pagemap_walk.pmd_entry = pagemap_pte_range;
+ pagemap_walk.pte_hole = pagemap_pte_hole;
+ pagemap_walk.mm = mm;
+ pagemap_walk.private = ±
+
+ src = *ppos;
+ svpfn = src / PM_ENTRY_BYTES;
+ start_vaddr = svpfn << PAGE_SHIFT;
+ end_vaddr = TASK_SIZE_OF(task);
+
+ /* watch out for wraparound */
+ if (svpfn > TASK_SIZE_OF(task) >> PAGE_SHIFT)
+ start_vaddr = end_vaddr;
+
+ /*
+ * The odds are that this will stop walking way
+ * before end_vaddr, because the length of the
+ * user buffer is tracked in "pm", and the walk
+ * will stop when we hit the end of the buffer.
+ */
+ ret = walk_page_range(start_vaddr, end_vaddr, &pagemap_walk);
+ if (ret == PM_END_OF_BUFFER)
+ ret = 0;
+ /* don't need mmap_sem for these, but this looks cleaner */
+ *ppos += (char *)pm.out - buf;
+ if (!ret)
+ ret = (char *)pm.out - buf;
out_pages:
for (; pagecount; pagecount--) {
#ifdef CONFIG_NUMA
extern int show_numa_map(struct seq_file *m, void *v);
-static int show_numa_map_checked(struct seq_file *m, void *v)
-{
- struct proc_maps_private *priv = m->private;
- struct task_struct *task = priv->task;
-
- if (maps_protect && !ptrace_may_attach(task))
- return -EACCES;
-
- return show_numa_map(m, v);
-}
-
static const struct seq_operations proc_pid_numa_maps_op = {
.start = m_start,
.next = m_next,
.stop = m_stop,
- .show = show_numa_map_checked
+ .show = show_numa_map,
};
static int numa_maps_open(struct inode *inode, struct file *file)
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff