summaryrefslogtreecommitdiff
path: root/fs/proc
diff options
context:
space:
mode:
Diffstat (limited to 'fs/proc')
-rw-r--r--fs/proc/array.c1
-rw-r--r--fs/proc/base.c6
-rw-r--r--fs/proc/generic.c1
-rw-r--r--fs/proc/inode.c1
-rw-r--r--fs/proc/kcore.c3
-rw-r--r--fs/proc/nommu.c1
-rw-r--r--fs/proc/proc_devtree.c1
-rw-r--r--fs/proc/proc_net.c1
-rw-r--r--fs/proc/stat.c1
-rw-r--r--fs/proc/task_mmu.c115
-rw-r--r--fs/proc/task_nommu.c1
-rw-r--r--fs/proc/vmcore.c1
12 files changed, 58 insertions, 75 deletions
diff --git a/fs/proc/array.c b/fs/proc/array.c
index aa8637b..e51f2ec 100644
--- a/fs/proc/array.c
+++ b/fs/proc/array.c
@@ -68,7 +68,6 @@
#include <linux/hugetlb.h>
#include <linux/pagemap.h>
#include <linux/swap.h>
-#include <linux/slab.h>
#include <linux/smp.h>
#include <linux/signal.h>
#include <linux/highmem.h>
diff --git a/fs/proc/base.c b/fs/proc/base.c
index a731084..7621db8 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -81,6 +81,7 @@
#include <linux/elf.h>
#include <linux/pid_namespace.h>
#include <linux/fs_struct.h>
+#include <linux/slab.h>
#include "internal.h"
/* NOTE:
@@ -442,12 +443,13 @@ static const struct file_operations proc_lstats_operations = {
unsigned long badness(struct task_struct *p, unsigned long uptime);
static int proc_oom_score(struct task_struct *task, char *buffer)
{
- unsigned long points;
+ unsigned long points = 0;
struct timespec uptime;
do_posix_clock_monotonic_gettime(&uptime);
read_lock(&tasklist_lock);
- points = badness(task->group_leader, uptime.tv_sec);
+ if (pid_alive(task))
+ points = badness(task, uptime.tv_sec);
read_unlock(&tasklist_lock);
return sprintf(buffer, "%lu\n", points);
}
diff --git a/fs/proc/generic.c b/fs/proc/generic.c
index 08f4d71..43c1274 100644
--- a/fs/proc/generic.c
+++ b/fs/proc/generic.c
@@ -13,6 +13,7 @@
#include <linux/proc_fs.h>
#include <linux/stat.h>
#include <linux/module.h>
+#include <linux/slab.h>
#include <linux/mount.h>
#include <linux/init.h>
#include <linux/idr.h>
diff --git a/fs/proc/inode.c b/fs/proc/inode.c
index 445a02b..d35b232 100644
--- a/fs/proc/inode.c
+++ b/fs/proc/inode.c
@@ -18,6 +18,7 @@
#include <linux/module.h>
#include <linux/smp_lock.h>
#include <linux/sysctl.h>
+#include <linux/slab.h>
#include <asm/system.h>
#include <asm/uaccess.h>
diff --git a/fs/proc/kcore.c b/fs/proc/kcore.c
index a44a789..19979a2 100644
--- a/fs/proc/kcore.c
+++ b/fs/proc/kcore.c
@@ -19,6 +19,7 @@
#include <linux/highmem.h>
#include <linux/bootmem.h>
#include <linux/init.h>
+#include <linux/slab.h>
#include <asm/uaccess.h>
#include <asm/io.h>
#include <linux/list.h>
@@ -490,7 +491,7 @@ read_kcore(struct file *file, char __user *buffer, size_t buflen, loff_t *fpos)
}
read_unlock(&kclist_lock);
- if (m == NULL) {
+ if (&m->list == &kclist_head) {
if (clear_user(buffer, tsz))
return -EFAULT;
} else if (is_vmalloc_or_module_addr((void *)start)) {
diff --git a/fs/proc/nommu.c b/fs/proc/nommu.c
index 9fe7d7e..b1822dd 100644
--- a/fs/proc/nommu.c
+++ b/fs/proc/nommu.c
@@ -21,7 +21,6 @@
#include <linux/mmzone.h>
#include <linux/pagemap.h>
#include <linux/swap.h>
-#include <linux/slab.h>
#include <linux/smp.h>
#include <linux/seq_file.h>
#include <linux/hugetlb.h>
diff --git a/fs/proc/proc_devtree.c b/fs/proc/proc_devtree.c
index f8650dc..ce94801 100644
--- a/fs/proc/proc_devtree.c
+++ b/fs/proc/proc_devtree.c
@@ -12,6 +12,7 @@
#include <linux/string.h>
#include <linux/of.h>
#include <linux/module.h>
+#include <linux/slab.h>
#include <asm/prom.h>
#include <asm/uaccess.h>
#include "internal.h"
diff --git a/fs/proc/proc_net.c b/fs/proc/proc_net.c
index 04d1270..9020ac1 100644
--- a/fs/proc/proc_net.c
+++ b/fs/proc/proc_net.c
@@ -14,6 +14,7 @@
#include <linux/time.h>
#include <linux/proc_fs.h>
#include <linux/stat.h>
+#include <linux/slab.h>
#include <linux/init.h>
#include <linux/sched.h>
#include <linux/module.h>
diff --git a/fs/proc/stat.c b/fs/proc/stat.c
index b9b7aad..bf31b03 100644
--- a/fs/proc/stat.c
+++ b/fs/proc/stat.c
@@ -1,6 +1,5 @@
#include <linux/cpumask.h>
#include <linux/fs.h>
-#include <linux/gfp.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/kernel_stat.h>
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index 183f8ff..0705534 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -4,6 +4,7 @@
#include <linux/seq_file.h>
#include <linux/highmem.h>
#include <linux/ptrace.h>
+#include <linux/slab.h>
#include <linux/pagemap.h>
#include <linux/mempolicy.h>
#include <linux/swap.h>
@@ -406,6 +407,7 @@ static int show_smap(struct seq_file *m, void *v)
memset(&mss, 0, sizeof mss);
mss.vma = vma;
+ /* mmap_sem is held in m_start */
if (vma->vm_mm && !is_vm_hugetlb_page(vma))
walk_page_range(vma->vm_start, vma->vm_end, &smaps_walk);
@@ -552,7 +554,8 @@ const struct file_operations proc_clear_refs_operations = {
};
struct pagemapread {
- u64 __user *out, *end;
+ int pos, len;
+ u64 *buffer;
};
#define PM_ENTRY_BYTES sizeof(u64)
@@ -575,10 +578,8 @@ struct pagemapread {
static int add_to_pagemap(unsigned long addr, u64 pfn,
struct pagemapread *pm)
{
- if (put_user(pfn, pm->out))
- return -EFAULT;
- pm->out++;
- if (pm->out >= pm->end)
+ pm->buffer[pm->pos++] = pfn;
+ if (pm->pos >= pm->len)
return PM_END_OF_BUFFER;
return 0;
}
@@ -661,31 +662,18 @@ static u64 huge_pte_to_pagemap_entry(pte_t pte, int offset)
return pme;
}
-static int pagemap_hugetlb_range(pte_t *pte, unsigned long addr,
- unsigned long end, struct mm_walk *walk)
+/* This function walks within one hugetlb entry in the single call */
+static int pagemap_hugetlb_range(pte_t *pte, unsigned long hmask,
+ unsigned long addr, unsigned long end,
+ struct mm_walk *walk)
{
- struct vm_area_struct *vma;
struct pagemapread *pm = walk->private;
- struct hstate *hs = NULL;
int err = 0;
+ u64 pfn;
- vma = find_vma(walk->mm, addr);
- if (vma)
- hs = hstate_vma(vma);
for (; addr != end; addr += PAGE_SIZE) {
- u64 pfn = PM_NOT_PRESENT;
-
- if (vma && (addr >= vma->vm_end)) {
- vma = find_vma(walk->mm, addr);
- if (vma)
- hs = hstate_vma(vma);
- }
-
- if (vma && (vma->vm_start <= addr) && is_vm_hugetlb_page(vma)) {
- /* calculate pfn of the "raw" page in the hugepage. */
- int offset = (addr & ~huge_page_mask(hs)) >> PAGE_SHIFT;
- pfn = huge_pte_to_pagemap_entry(*pte, offset);
- }
+ int offset = (addr & ~hmask) >> PAGE_SHIFT;
+ pfn = huge_pte_to_pagemap_entry(*pte, offset);
err = add_to_pagemap(addr, pfn, pm);
if (err)
return err;
@@ -720,21 +708,20 @@ static int pagemap_hugetlb_range(pte_t *pte, unsigned long addr,
* determine which areas of memory are actually mapped and llseek to
* skip over unmapped regions.
*/
+#define PAGEMAP_WALK_SIZE (PMD_SIZE)
static ssize_t pagemap_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
{
struct task_struct *task = get_proc_task(file->f_path.dentry->d_inode);
- struct page **pages, *page;
- unsigned long uaddr, uend;
struct mm_struct *mm;
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;
+ int copied = 0;
if (!task)
goto out;
@@ -757,35 +744,12 @@ static ssize_t pagemap_read(struct file *file, char __user *buf,
if (!mm)
goto out_task;
-
- uaddr = (unsigned long)buf & PAGE_MASK;
- uend = (unsigned long)(buf + count);
- pagecount = (PAGE_ALIGN(uend) - uaddr) / PAGE_SIZE;
- ret = 0;
- if (pagecount == 0)
- goto out_mm;
- pages = kcalloc(pagecount, sizeof(struct page *), GFP_KERNEL);
+ pm.len = PM_ENTRY_BYTES * (PAGEMAP_WALK_SIZE >> PAGE_SHIFT);
+ pm.buffer = kmalloc(pm.len, GFP_TEMPORARY);
ret = -ENOMEM;
- if (!pages)
+ if (!pm.buffer)
goto out_mm;
- down_read(&current->mm->mmap_sem);
- ret = get_user_pages(current, current->mm, uaddr, pagecount,
- 1, 0, pages, NULL);
- up_read(&current->mm->mmap_sem);
-
- if (ret < 0)
- goto out_free;
-
- if (ret != pagecount) {
- pagecount = ret;
- ret = -EFAULT;
- goto out_pages;
- }
-
- pm.out = (u64 __user *)buf;
- pm.end = (u64 __user *)(buf + count);
-
pagemap_walk.pmd_entry = pagemap_pte_range;
pagemap_walk.pte_hole = pagemap_pte_hole;
pagemap_walk.hugetlb_entry = pagemap_hugetlb_range;
@@ -807,23 +771,36 @@ static ssize_t pagemap_read(struct file *file, char __user *buf,
* 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 __user *)pm.out - buf;
- if (!ret)
- ret = (char __user *)pm.out - buf;
-
-out_pages:
- for (; pagecount; pagecount--) {
- page = pages[pagecount-1];
- if (!PageReserved(page))
- SetPageDirty(page);
- page_cache_release(page);
+ ret = 0;
+ while (count && (start_vaddr < end_vaddr)) {
+ int len;
+ unsigned long end;
+
+ pm.pos = 0;
+ end = start_vaddr + PAGEMAP_WALK_SIZE;
+ /* overflow ? */
+ if (end < start_vaddr || end > end_vaddr)
+ end = end_vaddr;
+ down_read(&mm->mmap_sem);
+ ret = walk_page_range(start_vaddr, end, &pagemap_walk);
+ up_read(&mm->mmap_sem);
+ start_vaddr = end;
+
+ len = min(count, PM_ENTRY_BYTES * pm.pos);
+ if (copy_to_user(buf, pm.buffer, len)) {
+ ret = -EFAULT;
+ goto out_free;
+ }
+ copied += len;
+ buf += len;
+ count -= len;
}
+ *ppos += copied;
+ if (!ret || ret == PM_END_OF_BUFFER)
+ ret = copied;
+
out_free:
- kfree(pages);
+ kfree(pm.buffer);
out_mm:
mmput(mm);
out_task:
diff --git a/fs/proc/task_nommu.c b/fs/proc/task_nommu.c
index 5d9fd64..46d4b5d 100644
--- a/fs/proc/task_nommu.c
+++ b/fs/proc/task_nommu.c
@@ -5,6 +5,7 @@
#include <linux/fs_struct.h>
#include <linux/mount.h>
#include <linux/ptrace.h>
+#include <linux/slab.h>
#include <linux/seq_file.h>
#include "internal.h"
diff --git a/fs/proc/vmcore.c b/fs/proc/vmcore.c
index 0872afa..9fbc99e 100644
--- a/fs/proc/vmcore.c
+++ b/fs/proc/vmcore.c
@@ -12,6 +12,7 @@
#include <linux/user.h>
#include <linux/elf.h>
#include <linux/elfcore.h>
+#include <linux/slab.h>
#include <linux/highmem.h>
#include <linux/bootmem.h>
#include <linux/init.h>
generated by cgit v0.10.2 at 2024-11-16 00:22:47 (GMT)