blob: 26f9cc00102c87ac53762116f08dd3631826d87d [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001#include <linux/mm.h>
2#include <linux/hugetlb.h>
Dave Hansen22e057c2011-03-22 16:33:00 -07003#include <linux/huge_mm.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07004#include <linux/mount.h>
5#include <linux/seq_file.h>
Mauricio Line070ad42005-09-03 15:55:10 -07006#include <linux/highmem.h>
Kees Cook5096add2007-05-08 00:26:04 -07007#include <linux/ptrace.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +09008#include <linux/slab.h>
Christoph Lameter6e21c8f2005-09-03 15:54:45 -07009#include <linux/pagemap.h>
10#include <linux/mempolicy.h>
Dave Hansen22e057c2011-03-22 16:33:00 -070011#include <linux/rmap.h>
Matt Mackall85863e42008-02-04 22:29:04 -080012#include <linux/swap.h>
13#include <linux/swapops.h>
Mauricio Line070ad42005-09-03 15:55:10 -070014
Linus Torvalds1da177e2005-04-16 15:20:36 -070015#include <asm/elf.h>
16#include <asm/uaccess.h>
Mauricio Line070ad42005-09-03 15:55:10 -070017#include <asm/tlbflush.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070018#include "internal.h"
19
Eric W. Biedermandf5f8312008-02-08 04:18:33 -080020void task_mem(struct seq_file *m, struct mm_struct *mm)
Linus Torvalds1da177e2005-04-16 15:20:36 -070021{
KAMEZAWA Hiroyukib084d432010-03-05 13:41:42 -080022 unsigned long data, text, lib, swap;
Hugh Dickins365e9c872005-10-29 18:16:18 -070023 unsigned long hiwater_vm, total_vm, hiwater_rss, total_rss;
24
25 /*
26 * Note: to minimize their overhead, mm maintains hiwater_vm and
27 * hiwater_rss only when about to *lower* total_vm or rss. Any
28 * collector of these hiwater stats must therefore get total_vm
29 * and rss too, which will usually be the higher. Barriers? not
30 * worth the effort, such snapshots can always be inconsistent.
31 */
32 hiwater_vm = total_vm = mm->total_vm;
33 if (hiwater_vm < mm->hiwater_vm)
34 hiwater_vm = mm->hiwater_vm;
35 hiwater_rss = total_rss = get_mm_rss(mm);
36 if (hiwater_rss < mm->hiwater_rss)
37 hiwater_rss = mm->hiwater_rss;
Linus Torvalds1da177e2005-04-16 15:20:36 -070038
39 data = mm->total_vm - mm->shared_vm - mm->stack_vm;
40 text = (PAGE_ALIGN(mm->end_code) - (mm->start_code & PAGE_MASK)) >> 10;
41 lib = (mm->exec_vm << (PAGE_SHIFT-10)) - text;
KAMEZAWA Hiroyukib084d432010-03-05 13:41:42 -080042 swap = get_mm_counter(mm, MM_SWAPENTS);
Eric W. Biedermandf5f8312008-02-08 04:18:33 -080043 seq_printf(m,
Hugh Dickins365e9c872005-10-29 18:16:18 -070044 "VmPeak:\t%8lu kB\n"
Linus Torvalds1da177e2005-04-16 15:20:36 -070045 "VmSize:\t%8lu kB\n"
46 "VmLck:\t%8lu kB\n"
Hugh Dickins365e9c872005-10-29 18:16:18 -070047 "VmHWM:\t%8lu kB\n"
Linus Torvalds1da177e2005-04-16 15:20:36 -070048 "VmRSS:\t%8lu kB\n"
49 "VmData:\t%8lu kB\n"
50 "VmStk:\t%8lu kB\n"
51 "VmExe:\t%8lu kB\n"
52 "VmLib:\t%8lu kB\n"
KAMEZAWA Hiroyukib084d432010-03-05 13:41:42 -080053 "VmPTE:\t%8lu kB\n"
54 "VmSwap:\t%8lu kB\n",
Hugh Dickins365e9c872005-10-29 18:16:18 -070055 hiwater_vm << (PAGE_SHIFT-10),
56 (total_vm - mm->reserved_vm) << (PAGE_SHIFT-10),
Linus Torvalds1da177e2005-04-16 15:20:36 -070057 mm->locked_vm << (PAGE_SHIFT-10),
Hugh Dickins365e9c872005-10-29 18:16:18 -070058 hiwater_rss << (PAGE_SHIFT-10),
59 total_rss << (PAGE_SHIFT-10),
Linus Torvalds1da177e2005-04-16 15:20:36 -070060 data << (PAGE_SHIFT-10),
61 mm->stack_vm << (PAGE_SHIFT-10), text, lib,
KAMEZAWA Hiroyukib084d432010-03-05 13:41:42 -080062 (PTRS_PER_PTE*sizeof(pte_t)*mm->nr_ptes) >> 10,
63 swap << (PAGE_SHIFT-10));
Linus Torvalds1da177e2005-04-16 15:20:36 -070064}
65
66unsigned long task_vsize(struct mm_struct *mm)
67{
68 return PAGE_SIZE * mm->total_vm;
69}
70
Alexey Dobriyana2ade7b2011-01-12 17:00:32 -080071unsigned long task_statm(struct mm_struct *mm,
72 unsigned long *shared, unsigned long *text,
73 unsigned long *data, unsigned long *resident)
Linus Torvalds1da177e2005-04-16 15:20:36 -070074{
KAMEZAWA Hiroyukid559db02010-03-05 13:41:39 -080075 *shared = get_mm_counter(mm, MM_FILEPAGES);
Linus Torvalds1da177e2005-04-16 15:20:36 -070076 *text = (PAGE_ALIGN(mm->end_code) - (mm->start_code & PAGE_MASK))
77 >> PAGE_SHIFT;
78 *data = mm->total_vm - mm->shared_vm;
KAMEZAWA Hiroyukid559db02010-03-05 13:41:39 -080079 *resident = *shared + get_mm_counter(mm, MM_ANONPAGES);
Linus Torvalds1da177e2005-04-16 15:20:36 -070080 return mm->total_vm;
81}
82
Linus Torvalds1da177e2005-04-16 15:20:36 -070083static void pad_len_spaces(struct seq_file *m, int len)
84{
85 len = 25 + sizeof(void*) * 6 - len;
86 if (len < 1)
87 len = 1;
88 seq_printf(m, "%*c", len, ' ');
89}
90
Matt Mackalla6198792008-02-04 22:29:03 -080091static void vma_stop(struct proc_maps_private *priv, struct vm_area_struct *vma)
Mauricio Line070ad42005-09-03 15:55:10 -070092{
Matt Mackalla6198792008-02-04 22:29:03 -080093 if (vma && vma != priv->tail_vma) {
94 struct mm_struct *mm = vma->vm_mm;
95 up_read(&mm->mmap_sem);
96 mmput(mm);
97 }
98}
99
100static void *m_start(struct seq_file *m, loff_t *pos)
101{
102 struct proc_maps_private *priv = m->private;
103 unsigned long last_addr = m->version;
104 struct mm_struct *mm;
105 struct vm_area_struct *vma, *tail_vma = NULL;
106 loff_t l = *pos;
107
108 /* Clear the per syscall fields in priv */
109 priv->task = NULL;
110 priv->tail_vma = NULL;
111
112 /*
113 * We remember last_addr rather than next_addr to hit with
114 * mmap_cache most of the time. We have zero last_addr at
115 * the beginning and also after lseek. We will have -1 last_addr
116 * after the end of the vmas.
117 */
118
119 if (last_addr == -1UL)
120 return NULL;
121
122 priv->task = get_pid_task(priv->pid, PIDTYPE_PID);
123 if (!priv->task)
124 return NULL;
125
126 mm = mm_for_maps(priv->task);
127 if (!mm)
128 return NULL;
Oleg Nesterov00f89d22009-07-10 03:27:38 +0200129 down_read(&mm->mmap_sem);
Matt Mackalla6198792008-02-04 22:29:03 -0800130
131 tail_vma = get_gate_vma(priv->task);
132 priv->tail_vma = tail_vma;
133
134 /* Start with last addr hint */
135 vma = find_vma(mm, last_addr);
136 if (last_addr && vma) {
137 vma = vma->vm_next;
138 goto out;
139 }
140
141 /*
142 * Check the vma index is within the range and do
143 * sequential scan until m_index.
144 */
145 vma = NULL;
146 if ((unsigned long)l < mm->map_count) {
147 vma = mm->mmap;
148 while (l-- && vma)
149 vma = vma->vm_next;
150 goto out;
151 }
152
153 if (l != mm->map_count)
154 tail_vma = NULL; /* After gate vma */
155
156out:
157 if (vma)
158 return vma;
159
160 /* End of vmas has been reached */
161 m->version = (tail_vma != NULL)? 0: -1UL;
162 up_read(&mm->mmap_sem);
163 mmput(mm);
164 return tail_vma;
165}
166
167static void *m_next(struct seq_file *m, void *v, loff_t *pos)
168{
169 struct proc_maps_private *priv = m->private;
170 struct vm_area_struct *vma = v;
171 struct vm_area_struct *tail_vma = priv->tail_vma;
172
173 (*pos)++;
174 if (vma && (vma != tail_vma) && vma->vm_next)
175 return vma->vm_next;
176 vma_stop(priv, vma);
177 return (vma != tail_vma)? tail_vma: NULL;
178}
179
180static void m_stop(struct seq_file *m, void *v)
181{
182 struct proc_maps_private *priv = m->private;
183 struct vm_area_struct *vma = v;
184
185 vma_stop(priv, vma);
186 if (priv->task)
187 put_task_struct(priv->task);
188}
189
190static int do_maps_open(struct inode *inode, struct file *file,
Jan Engelhardt03a44822008-02-08 04:21:19 -0800191 const struct seq_operations *ops)
Matt Mackalla6198792008-02-04 22:29:03 -0800192{
193 struct proc_maps_private *priv;
194 int ret = -ENOMEM;
195 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
196 if (priv) {
197 priv->pid = proc_pid(inode);
198 ret = seq_open(file, ops);
199 if (!ret) {
200 struct seq_file *m = file->private_data;
201 m->private = priv;
202 } else {
203 kfree(priv);
204 }
205 }
206 return ret;
207}
Mauricio Line070ad42005-09-03 15:55:10 -0700208
Joe Korty7c88db02008-10-16 15:27:09 +0400209static void show_map_vma(struct seq_file *m, struct vm_area_struct *vma)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210{
Mauricio Line070ad42005-09-03 15:55:10 -0700211 struct mm_struct *mm = vma->vm_mm;
212 struct file *file = vma->vm_file;
213 int flags = vma->vm_flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214 unsigned long ino = 0;
KAMEZAWA Hiroyuki6260a4b2009-04-06 19:00:30 -0700215 unsigned long long pgoff = 0;
Linus Torvaldsd7824372010-08-15 11:35:52 -0700216 unsigned long start;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217 dev_t dev = 0;
218 int len;
219
220 if (file) {
Josef "Jeff" Sipek2fddfee2006-12-08 02:36:36 -0800221 struct inode *inode = vma->vm_file->f_path.dentry->d_inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222 dev = inode->i_sb->s_dev;
223 ino = inode->i_ino;
KAMEZAWA Hiroyuki6260a4b2009-04-06 19:00:30 -0700224 pgoff = ((loff_t)vma->vm_pgoff) << PAGE_SHIFT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225 }
226
Linus Torvaldsd7824372010-08-15 11:35:52 -0700227 /* We don't show the stack guard page in /proc/maps */
228 start = vma->vm_start;
229 if (vma->vm_flags & VM_GROWSDOWN)
Stefan Bader39aa3cb2010-08-31 15:52:27 +0200230 if (!vma_stack_continue(vma->vm_prev, vma->vm_start))
231 start += PAGE_SIZE;
Linus Torvaldsd7824372010-08-15 11:35:52 -0700232
Clement Calmels1804dc62008-08-20 14:09:00 -0700233 seq_printf(m, "%08lx-%08lx %c%c%c%c %08llx %02x:%02x %lu %n",
Linus Torvaldsd7824372010-08-15 11:35:52 -0700234 start,
Mauricio Line070ad42005-09-03 15:55:10 -0700235 vma->vm_end,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236 flags & VM_READ ? 'r' : '-',
237 flags & VM_WRITE ? 'w' : '-',
238 flags & VM_EXEC ? 'x' : '-',
239 flags & VM_MAYSHARE ? 's' : 'p',
KAMEZAWA Hiroyuki6260a4b2009-04-06 19:00:30 -0700240 pgoff,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241 MAJOR(dev), MINOR(dev), ino, &len);
242
243 /*
244 * Print the dentry name for named mappings, and a
245 * special [heap] marker for the heap:
246 */
Mauricio Line070ad42005-09-03 15:55:10 -0700247 if (file) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248 pad_len_spaces(m, len);
Jan Blunckc32c2f62008-02-14 19:38:43 -0800249 seq_path(m, &file->f_path, "\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250 } else {
Ingo Molnare6e54942006-06-27 02:53:50 -0700251 const char *name = arch_vma_name(vma);
252 if (!name) {
253 if (mm) {
254 if (vma->vm_start <= mm->start_brk &&
Mauricio Line070ad42005-09-03 15:55:10 -0700255 vma->vm_end >= mm->brk) {
Ingo Molnare6e54942006-06-27 02:53:50 -0700256 name = "[heap]";
257 } else if (vma->vm_start <= mm->start_stack &&
258 vma->vm_end >= mm->start_stack) {
259 name = "[stack]";
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260 }
Ingo Molnare6e54942006-06-27 02:53:50 -0700261 } else {
262 name = "[vdso]";
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263 }
Ingo Molnare6e54942006-06-27 02:53:50 -0700264 }
265 if (name) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266 pad_len_spaces(m, len);
Ingo Molnare6e54942006-06-27 02:53:50 -0700267 seq_puts(m, name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268 }
269 }
270 seq_putc(m, '\n');
Joe Korty7c88db02008-10-16 15:27:09 +0400271}
272
273static int show_map(struct seq_file *m, void *v)
274{
275 struct vm_area_struct *vma = v;
276 struct proc_maps_private *priv = m->private;
277 struct task_struct *task = priv->task;
278
279 show_map_vma(m, vma);
Mauricio Line070ad42005-09-03 15:55:10 -0700280
Mauricio Line070ad42005-09-03 15:55:10 -0700281 if (m->count < m->size) /* vma is copied successfully */
282 m->version = (vma != get_gate_vma(task))? vma->vm_start: 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283 return 0;
284}
285
Jan Engelhardt03a44822008-02-08 04:21:19 -0800286static const struct seq_operations proc_pid_maps_op = {
Matt Mackalla6198792008-02-04 22:29:03 -0800287 .start = m_start,
288 .next = m_next,
289 .stop = m_stop,
290 .show = show_map
291};
292
293static int maps_open(struct inode *inode, struct file *file)
294{
295 return do_maps_open(inode, file, &proc_pid_maps_op);
296}
297
298const struct file_operations proc_maps_operations = {
299 .open = maps_open,
300 .read = seq_read,
301 .llseek = seq_lseek,
302 .release = seq_release_private,
303};
304
305/*
306 * Proportional Set Size(PSS): my share of RSS.
307 *
308 * PSS of a process is the count of pages it has in memory, where each
309 * page is divided by the number of processes sharing it. So if a
310 * process has 1000 pages all to itself, and 1000 shared with one other
311 * process, its PSS will be 1500.
312 *
313 * To keep (accumulated) division errors low, we adopt a 64bit
314 * fixed-point pss counter to minimize division errors. So (pss >>
315 * PSS_SHIFT) would be the real byte count.
316 *
317 * A shift of 12 before division means (assuming 4K page size):
318 * - 1M 3-user-pages add up to 8KB errors;
319 * - supports mapcount up to 2^24, or 16M;
320 * - supports PSS up to 2^52 bytes, or 4PB.
321 */
322#define PSS_SHIFT 12
323
Matt Mackall1e883282008-02-04 22:29:07 -0800324#ifdef CONFIG_PROC_PAGE_MONITOR
Peter Zijlstra214e4712008-04-28 02:12:55 -0700325struct mem_size_stats {
Matt Mackalla6198792008-02-04 22:29:03 -0800326 struct vm_area_struct *vma;
327 unsigned long resident;
328 unsigned long shared_clean;
329 unsigned long shared_dirty;
330 unsigned long private_clean;
331 unsigned long private_dirty;
332 unsigned long referenced;
Nikanth Karthikesanb40d4f82010-10-27 15:34:10 -0700333 unsigned long anonymous;
Peter Zijlstra214e4712008-04-28 02:12:55 -0700334 unsigned long swap;
Matt Mackalla6198792008-02-04 22:29:03 -0800335 u64 pss;
336};
337
Dave Hansenae11c4d2011-03-22 16:32:58 -0700338
339static void smaps_pte_entry(pte_t ptent, unsigned long addr,
Dave Hansen3c9acc72011-03-22 16:32:59 -0700340 unsigned long ptent_size, struct mm_walk *walk)
Dave Hansenae11c4d2011-03-22 16:32:58 -0700341{
342 struct mem_size_stats *mss = walk->private;
343 struct vm_area_struct *vma = mss->vma;
344 struct page *page;
345 int mapcount;
346
347 if (is_swap_pte(ptent)) {
Dave Hansen3c9acc72011-03-22 16:32:59 -0700348 mss->swap += ptent_size;
Dave Hansenae11c4d2011-03-22 16:32:58 -0700349 return;
350 }
351
352 if (!pte_present(ptent))
353 return;
354
355 page = vm_normal_page(vma, addr, ptent);
356 if (!page)
357 return;
358
359 if (PageAnon(page))
Dave Hansen3c9acc72011-03-22 16:32:59 -0700360 mss->anonymous += ptent_size;
Dave Hansenae11c4d2011-03-22 16:32:58 -0700361
Dave Hansen3c9acc72011-03-22 16:32:59 -0700362 mss->resident += ptent_size;
Dave Hansenae11c4d2011-03-22 16:32:58 -0700363 /* Accumulate the size in pages that have been accessed. */
364 if (pte_young(ptent) || PageReferenced(page))
Dave Hansen3c9acc72011-03-22 16:32:59 -0700365 mss->referenced += ptent_size;
Dave Hansenae11c4d2011-03-22 16:32:58 -0700366 mapcount = page_mapcount(page);
367 if (mapcount >= 2) {
368 if (pte_dirty(ptent) || PageDirty(page))
Dave Hansen3c9acc72011-03-22 16:32:59 -0700369 mss->shared_dirty += ptent_size;
Dave Hansenae11c4d2011-03-22 16:32:58 -0700370 else
Dave Hansen3c9acc72011-03-22 16:32:59 -0700371 mss->shared_clean += ptent_size;
372 mss->pss += (ptent_size << PSS_SHIFT) / mapcount;
Dave Hansenae11c4d2011-03-22 16:32:58 -0700373 } else {
374 if (pte_dirty(ptent) || PageDirty(page))
Dave Hansen3c9acc72011-03-22 16:32:59 -0700375 mss->private_dirty += ptent_size;
Dave Hansenae11c4d2011-03-22 16:32:58 -0700376 else
Dave Hansen3c9acc72011-03-22 16:32:59 -0700377 mss->private_clean += ptent_size;
378 mss->pss += (ptent_size << PSS_SHIFT);
Dave Hansenae11c4d2011-03-22 16:32:58 -0700379 }
380}
381
Matt Mackallb3ae5ac2008-02-04 22:29:01 -0800382static int smaps_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end,
Dave Hansen21650092008-06-12 15:21:47 -0700383 struct mm_walk *walk)
Mauricio Line070ad42005-09-03 15:55:10 -0700384{
Dave Hansen21650092008-06-12 15:21:47 -0700385 struct mem_size_stats *mss = walk->private;
Matt Mackallb3ae5ac2008-02-04 22:29:01 -0800386 struct vm_area_struct *vma = mss->vma;
Dave Hansenae11c4d2011-03-22 16:32:58 -0700387 pte_t *pte;
Hugh Dickins705e87c2005-10-29 18:16:27 -0700388 spinlock_t *ptl;
Mauricio Line070ad42005-09-03 15:55:10 -0700389
Dave Hansen22e057c2011-03-22 16:33:00 -0700390 spin_lock(&walk->mm->page_table_lock);
391 if (pmd_trans_huge(*pmd)) {
392 if (pmd_trans_splitting(*pmd)) {
393 spin_unlock(&walk->mm->page_table_lock);
394 wait_split_huge_page(vma->anon_vma, pmd);
395 } else {
396 smaps_pte_entry(*(pte_t *)pmd, addr,
397 HPAGE_PMD_SIZE, walk);
398 spin_unlock(&walk->mm->page_table_lock);
399 return 0;
400 }
401 } else {
402 spin_unlock(&walk->mm->page_table_lock);
403 }
404 /*
405 * The mmap_sem held all the way back in m_start() is what
406 * keeps khugepaged out of here and from collapsing things
407 * in here.
408 */
Hugh Dickins705e87c2005-10-29 18:16:27 -0700409 pte = pte_offset_map_lock(vma->vm_mm, pmd, addr, &ptl);
Dave Hansenae11c4d2011-03-22 16:32:58 -0700410 for (; addr != end; pte++, addr += PAGE_SIZE)
Dave Hansen3c9acc72011-03-22 16:32:59 -0700411 smaps_pte_entry(*pte, addr, PAGE_SIZE, walk);
Hugh Dickins705e87c2005-10-29 18:16:27 -0700412 pte_unmap_unlock(pte - 1, ptl);
413 cond_resched();
Matt Mackallb3ae5ac2008-02-04 22:29:01 -0800414 return 0;
Mauricio Line070ad42005-09-03 15:55:10 -0700415}
416
Mauricio Line070ad42005-09-03 15:55:10 -0700417static int show_smap(struct seq_file *m, void *v)
418{
Joe Korty7c88db02008-10-16 15:27:09 +0400419 struct proc_maps_private *priv = m->private;
420 struct task_struct *task = priv->task;
Mauricio Line070ad42005-09-03 15:55:10 -0700421 struct vm_area_struct *vma = v;
Mauricio Line070ad42005-09-03 15:55:10 -0700422 struct mem_size_stats mss;
Dave Hansen21650092008-06-12 15:21:47 -0700423 struct mm_walk smaps_walk = {
424 .pmd_entry = smaps_pte_range,
425 .mm = vma->vm_mm,
426 .private = &mss,
427 };
Mauricio Line070ad42005-09-03 15:55:10 -0700428
429 memset(&mss, 0, sizeof mss);
Matt Mackallb3ae5ac2008-02-04 22:29:01 -0800430 mss.vma = vma;
KAMEZAWA Hiroyukid82ef022010-04-02 09:11:29 +0900431 /* mmap_sem is held in m_start */
Nick Piggin5ddfae12006-03-06 15:42:57 -0800432 if (vma->vm_mm && !is_vm_hugetlb_page(vma))
Dave Hansen21650092008-06-12 15:21:47 -0700433 walk_page_range(vma->vm_start, vma->vm_end, &smaps_walk);
Matt Mackall4752c362008-02-04 22:29:02 -0800434
Joe Korty7c88db02008-10-16 15:27:09 +0400435 show_map_vma(m, vma);
Matt Mackall4752c362008-02-04 22:29:02 -0800436
437 seq_printf(m,
438 "Size: %8lu kB\n"
439 "Rss: %8lu kB\n"
440 "Pss: %8lu kB\n"
441 "Shared_Clean: %8lu kB\n"
442 "Shared_Dirty: %8lu kB\n"
443 "Private_Clean: %8lu kB\n"
444 "Private_Dirty: %8lu kB\n"
Peter Zijlstra214e4712008-04-28 02:12:55 -0700445 "Referenced: %8lu kB\n"
Nikanth Karthikesanb40d4f82010-10-27 15:34:10 -0700446 "Anonymous: %8lu kB\n"
Mel Gorman08fba692009-01-06 14:38:53 -0800447 "Swap: %8lu kB\n"
Mel Gorman33402892009-01-06 14:38:54 -0800448 "KernelPageSize: %8lu kB\n"
Nikanth Karthikesan2d905082011-01-13 15:45:53 -0800449 "MMUPageSize: %8lu kB\n"
450 "Locked: %8lu kB\n",
Matt Mackall4752c362008-02-04 22:29:02 -0800451 (vma->vm_end - vma->vm_start) >> 10,
452 mss.resident >> 10,
453 (unsigned long)(mss.pss >> (10 + PSS_SHIFT)),
454 mss.shared_clean >> 10,
455 mss.shared_dirty >> 10,
456 mss.private_clean >> 10,
457 mss.private_dirty >> 10,
Peter Zijlstra214e4712008-04-28 02:12:55 -0700458 mss.referenced >> 10,
Nikanth Karthikesanb40d4f82010-10-27 15:34:10 -0700459 mss.anonymous >> 10,
Mel Gorman08fba692009-01-06 14:38:53 -0800460 mss.swap >> 10,
Mel Gorman33402892009-01-06 14:38:54 -0800461 vma_kernel_pagesize(vma) >> 10,
Nikanth Karthikesan2d905082011-01-13 15:45:53 -0800462 vma_mmu_pagesize(vma) >> 10,
463 (vma->vm_flags & VM_LOCKED) ?
464 (unsigned long)(mss.pss >> (10 + PSS_SHIFT)) : 0);
Matt Mackall4752c362008-02-04 22:29:02 -0800465
Joe Korty7c88db02008-10-16 15:27:09 +0400466 if (m->count < m->size) /* vma is copied successfully */
467 m->version = (vma != get_gate_vma(task)) ? vma->vm_start : 0;
468 return 0;
Mauricio Line070ad42005-09-03 15:55:10 -0700469}
470
Jan Engelhardt03a44822008-02-08 04:21:19 -0800471static const struct seq_operations proc_pid_smaps_op = {
Matt Mackalla6198792008-02-04 22:29:03 -0800472 .start = m_start,
473 .next = m_next,
474 .stop = m_stop,
475 .show = show_smap
476};
477
478static int smaps_open(struct inode *inode, struct file *file)
479{
480 return do_maps_open(inode, file, &proc_pid_smaps_op);
481}
482
483const struct file_operations proc_smaps_operations = {
484 .open = smaps_open,
485 .read = seq_read,
486 .llseek = seq_lseek,
487 .release = seq_release_private,
488};
489
490static int clear_refs_pte_range(pmd_t *pmd, unsigned long addr,
Dave Hansen21650092008-06-12 15:21:47 -0700491 unsigned long end, struct mm_walk *walk)
Matt Mackalla6198792008-02-04 22:29:03 -0800492{
Dave Hansen21650092008-06-12 15:21:47 -0700493 struct vm_area_struct *vma = walk->private;
Matt Mackalla6198792008-02-04 22:29:03 -0800494 pte_t *pte, ptent;
495 spinlock_t *ptl;
496 struct page *page;
497
Dave Hansen03319322011-03-22 16:32:56 -0700498 split_huge_page_pmd(walk->mm, pmd);
499
Matt Mackalla6198792008-02-04 22:29:03 -0800500 pte = pte_offset_map_lock(vma->vm_mm, pmd, addr, &ptl);
501 for (; addr != end; pte++, addr += PAGE_SIZE) {
502 ptent = *pte;
503 if (!pte_present(ptent))
504 continue;
505
506 page = vm_normal_page(vma, addr, ptent);
507 if (!page)
508 continue;
509
510 /* Clear accessed and referenced bits. */
511 ptep_test_and_clear_young(vma, addr, pte);
512 ClearPageReferenced(page);
513 }
514 pte_unmap_unlock(pte - 1, ptl);
515 cond_resched();
516 return 0;
517}
518
Moussa A. Ba398499d2009-09-21 17:02:29 -0700519#define CLEAR_REFS_ALL 1
520#define CLEAR_REFS_ANON 2
521#define CLEAR_REFS_MAPPED 3
522
Matt Mackallf248dcb2008-02-04 22:29:03 -0800523static ssize_t clear_refs_write(struct file *file, const char __user *buf,
524 size_t count, loff_t *ppos)
David Rientjesb813e932007-05-06 14:49:24 -0700525{
Matt Mackallf248dcb2008-02-04 22:29:03 -0800526 struct task_struct *task;
Vincent Lifb92a4b2009-09-22 16:45:36 -0700527 char buffer[PROC_NUMBUF];
Matt Mackallf248dcb2008-02-04 22:29:03 -0800528 struct mm_struct *mm;
David Rientjesb813e932007-05-06 14:49:24 -0700529 struct vm_area_struct *vma;
Vincent Lifb92a4b2009-09-22 16:45:36 -0700530 long type;
David Rientjesb813e932007-05-06 14:49:24 -0700531
Matt Mackallf248dcb2008-02-04 22:29:03 -0800532 memset(buffer, 0, sizeof(buffer));
533 if (count > sizeof(buffer) - 1)
534 count = sizeof(buffer) - 1;
535 if (copy_from_user(buffer, buf, count))
536 return -EFAULT;
Vincent Lifb92a4b2009-09-22 16:45:36 -0700537 if (strict_strtol(strstrip(buffer), 10, &type))
538 return -EINVAL;
Moussa A. Ba398499d2009-09-21 17:02:29 -0700539 if (type < CLEAR_REFS_ALL || type > CLEAR_REFS_MAPPED)
Matt Mackallf248dcb2008-02-04 22:29:03 -0800540 return -EINVAL;
Matt Mackallf248dcb2008-02-04 22:29:03 -0800541 task = get_proc_task(file->f_path.dentry->d_inode);
542 if (!task)
543 return -ESRCH;
544 mm = get_task_mm(task);
545 if (mm) {
Andrew Morton20cbc972008-07-05 12:29:05 -0700546 struct mm_walk clear_refs_walk = {
547 .pmd_entry = clear_refs_pte_range,
548 .mm = mm,
549 };
Matt Mackallf248dcb2008-02-04 22:29:03 -0800550 down_read(&mm->mmap_sem);
Dave Hansen21650092008-06-12 15:21:47 -0700551 for (vma = mm->mmap; vma; vma = vma->vm_next) {
552 clear_refs_walk.private = vma;
Moussa A. Ba398499d2009-09-21 17:02:29 -0700553 if (is_vm_hugetlb_page(vma))
554 continue;
555 /*
556 * Writing 1 to /proc/pid/clear_refs affects all pages.
557 *
558 * Writing 2 to /proc/pid/clear_refs only affects
559 * Anonymous pages.
560 *
561 * Writing 3 to /proc/pid/clear_refs only affects file
562 * mapped pages.
563 */
564 if (type == CLEAR_REFS_ANON && vma->vm_file)
565 continue;
566 if (type == CLEAR_REFS_MAPPED && !vma->vm_file)
567 continue;
568 walk_page_range(vma->vm_start, vma->vm_end,
569 &clear_refs_walk);
Dave Hansen21650092008-06-12 15:21:47 -0700570 }
Matt Mackallf248dcb2008-02-04 22:29:03 -0800571 flush_tlb_mm(mm);
572 up_read(&mm->mmap_sem);
573 mmput(mm);
574 }
575 put_task_struct(task);
Vincent Lifb92a4b2009-09-22 16:45:36 -0700576
577 return count;
David Rientjesb813e932007-05-06 14:49:24 -0700578}
579
Matt Mackallf248dcb2008-02-04 22:29:03 -0800580const struct file_operations proc_clear_refs_operations = {
581 .write = clear_refs_write,
Arnd Bergmann6038f372010-08-15 18:52:59 +0200582 .llseek = noop_llseek,
Matt Mackallf248dcb2008-02-04 22:29:03 -0800583};
584
Matt Mackall85863e42008-02-04 22:29:04 -0800585struct pagemapread {
KAMEZAWA Hiroyukid82ef022010-04-02 09:11:29 +0900586 int pos, len;
587 u64 *buffer;
Matt Mackall85863e42008-02-04 22:29:04 -0800588};
589
Hans Rosenfeldf16278c2008-03-21 18:46:59 -0500590#define PM_ENTRY_BYTES sizeof(u64)
591#define PM_STATUS_BITS 3
592#define PM_STATUS_OFFSET (64 - PM_STATUS_BITS)
593#define PM_STATUS_MASK (((1LL << PM_STATUS_BITS) - 1) << PM_STATUS_OFFSET)
594#define PM_STATUS(nr) (((nr) << PM_STATUS_OFFSET) & PM_STATUS_MASK)
595#define PM_PSHIFT_BITS 6
596#define PM_PSHIFT_OFFSET (PM_STATUS_OFFSET - PM_PSHIFT_BITS)
597#define PM_PSHIFT_MASK (((1LL << PM_PSHIFT_BITS) - 1) << PM_PSHIFT_OFFSET)
598#define PM_PSHIFT(x) (((u64) (x) << PM_PSHIFT_OFFSET) & PM_PSHIFT_MASK)
599#define PM_PFRAME_MASK ((1LL << PM_PSHIFT_OFFSET) - 1)
600#define PM_PFRAME(x) ((x) & PM_PFRAME_MASK)
601
602#define PM_PRESENT PM_STATUS(4LL)
603#define PM_SWAP PM_STATUS(2LL)
604#define PM_NOT_PRESENT PM_PSHIFT(PAGE_SHIFT)
Matt Mackall85863e42008-02-04 22:29:04 -0800605#define PM_END_OF_BUFFER 1
606
607static int add_to_pagemap(unsigned long addr, u64 pfn,
608 struct pagemapread *pm)
609{
KAMEZAWA Hiroyukid82ef022010-04-02 09:11:29 +0900610 pm->buffer[pm->pos++] = pfn;
611 if (pm->pos >= pm->len)
Thomas Tuttleaae86792008-06-05 22:46:31 -0700612 return PM_END_OF_BUFFER;
Matt Mackall85863e42008-02-04 22:29:04 -0800613 return 0;
614}
615
616static int pagemap_pte_hole(unsigned long start, unsigned long end,
Dave Hansen21650092008-06-12 15:21:47 -0700617 struct mm_walk *walk)
Matt Mackall85863e42008-02-04 22:29:04 -0800618{
Dave Hansen21650092008-06-12 15:21:47 -0700619 struct pagemapread *pm = walk->private;
Matt Mackall85863e42008-02-04 22:29:04 -0800620 unsigned long addr;
621 int err = 0;
622 for (addr = start; addr < end; addr += PAGE_SIZE) {
623 err = add_to_pagemap(addr, PM_NOT_PRESENT, pm);
624 if (err)
625 break;
626 }
627 return err;
628}
629
Adrian Bunk9d02dbc2008-04-28 02:12:11 -0700630static u64 swap_pte_to_pagemap_entry(pte_t pte)
Matt Mackall85863e42008-02-04 22:29:04 -0800631{
632 swp_entry_t e = pte_to_swp_entry(pte);
Hans Rosenfeldf16278c2008-03-21 18:46:59 -0500633 return swp_type(e) | (swp_offset(e) << MAX_SWAPFILES_SHIFT);
Matt Mackall85863e42008-02-04 22:29:04 -0800634}
635
Matt Mackall49c50342008-12-09 13:14:21 -0800636static u64 pte_to_pagemap_entry(pte_t pte)
Dave Hansenbcf80392008-06-12 15:21:48 -0700637{
Matt Mackall49c50342008-12-09 13:14:21 -0800638 u64 pme = 0;
Dave Hansenbcf80392008-06-12 15:21:48 -0700639 if (is_swap_pte(pte))
640 pme = PM_PFRAME(swap_pte_to_pagemap_entry(pte))
641 | PM_PSHIFT(PAGE_SHIFT) | PM_SWAP;
642 else if (pte_present(pte))
643 pme = PM_PFRAME(pte_pfn(pte))
644 | PM_PSHIFT(PAGE_SHIFT) | PM_PRESENT;
645 return pme;
646}
647
Matt Mackall85863e42008-02-04 22:29:04 -0800648static int pagemap_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end,
Dave Hansen21650092008-06-12 15:21:47 -0700649 struct mm_walk *walk)
Matt Mackall85863e42008-02-04 22:29:04 -0800650{
Dave Hansenbcf80392008-06-12 15:21:48 -0700651 struct vm_area_struct *vma;
Dave Hansen21650092008-06-12 15:21:47 -0700652 struct pagemapread *pm = walk->private;
Matt Mackall85863e42008-02-04 22:29:04 -0800653 pte_t *pte;
654 int err = 0;
655
Dave Hansen03319322011-03-22 16:32:56 -0700656 split_huge_page_pmd(walk->mm, pmd);
657
Dave Hansenbcf80392008-06-12 15:21:48 -0700658 /* find the first VMA at or above 'addr' */
659 vma = find_vma(walk->mm, addr);
Matt Mackall85863e42008-02-04 22:29:04 -0800660 for (; addr != end; addr += PAGE_SIZE) {
661 u64 pfn = PM_NOT_PRESENT;
Dave Hansenbcf80392008-06-12 15:21:48 -0700662
663 /* check to see if we've left 'vma' behind
664 * and need a new, higher one */
665 if (vma && (addr >= vma->vm_end))
666 vma = find_vma(walk->mm, addr);
667
668 /* check that 'vma' actually covers this address,
669 * and that it isn't a huge page vma */
670 if (vma && (vma->vm_start <= addr) &&
671 !is_vm_hugetlb_page(vma)) {
672 pte = pte_offset_map(pmd, addr);
673 pfn = pte_to_pagemap_entry(*pte);
674 /* unmap before userspace copy */
675 pte_unmap(pte);
676 }
Matt Mackall85863e42008-02-04 22:29:04 -0800677 err = add_to_pagemap(addr, pfn, pm);
678 if (err)
679 return err;
680 }
681
682 cond_resched();
683
684 return err;
685}
686
Naoya Horiguchi1a5cb812010-05-24 14:32:12 -0700687#ifdef CONFIG_HUGETLB_PAGE
Naoya Horiguchi5dc37642009-12-14 18:00:01 -0800688static u64 huge_pte_to_pagemap_entry(pte_t pte, int offset)
689{
690 u64 pme = 0;
691 if (pte_present(pte))
692 pme = PM_PFRAME(pte_pfn(pte) + offset)
693 | PM_PSHIFT(PAGE_SHIFT) | PM_PRESENT;
694 return pme;
695}
696
Naoya Horiguchi116354d2010-04-06 14:35:04 -0700697/* This function walks within one hugetlb entry in the single call */
698static int pagemap_hugetlb_range(pte_t *pte, unsigned long hmask,
699 unsigned long addr, unsigned long end,
700 struct mm_walk *walk)
Naoya Horiguchi5dc37642009-12-14 18:00:01 -0800701{
Naoya Horiguchi5dc37642009-12-14 18:00:01 -0800702 struct pagemapread *pm = walk->private;
Naoya Horiguchi5dc37642009-12-14 18:00:01 -0800703 int err = 0;
Naoya Horiguchi116354d2010-04-06 14:35:04 -0700704 u64 pfn;
Naoya Horiguchi5dc37642009-12-14 18:00:01 -0800705
Naoya Horiguchi5dc37642009-12-14 18:00:01 -0800706 for (; addr != end; addr += PAGE_SIZE) {
Naoya Horiguchi116354d2010-04-06 14:35:04 -0700707 int offset = (addr & ~hmask) >> PAGE_SHIFT;
708 pfn = huge_pte_to_pagemap_entry(*pte, offset);
Naoya Horiguchi5dc37642009-12-14 18:00:01 -0800709 err = add_to_pagemap(addr, pfn, pm);
710 if (err)
711 return err;
712 }
713
714 cond_resched();
715
716 return err;
717}
Naoya Horiguchi1a5cb812010-05-24 14:32:12 -0700718#endif /* HUGETLB_PAGE */
Naoya Horiguchi5dc37642009-12-14 18:00:01 -0800719
Matt Mackall85863e42008-02-04 22:29:04 -0800720/*
721 * /proc/pid/pagemap - an array mapping virtual pages to pfns
722 *
Hans Rosenfeldf16278c2008-03-21 18:46:59 -0500723 * For each page in the address space, this file contains one 64-bit entry
724 * consisting of the following:
725 *
726 * Bits 0-55 page frame number (PFN) if present
727 * Bits 0-4 swap type if swapped
728 * Bits 5-55 swap offset if swapped
729 * Bits 55-60 page shift (page size = 1<<page shift)
730 * Bit 61 reserved for future use
731 * Bit 62 page swapped
732 * Bit 63 page present
733 *
734 * If the page is not present but in swap, then the PFN contains an
735 * encoding of the swap file number and the page's offset into the
736 * swap. Unmapped pages return a null PFN. This allows determining
Matt Mackall85863e42008-02-04 22:29:04 -0800737 * precisely which pages are mapped (or in swap) and comparing mapped
738 * pages between processes.
739 *
740 * Efficient users of this interface will use /proc/pid/maps to
741 * determine which areas of memory are actually mapped and llseek to
742 * skip over unmapped regions.
743 */
KAMEZAWA Hiroyukid82ef022010-04-02 09:11:29 +0900744#define PAGEMAP_WALK_SIZE (PMD_SIZE)
Naoya Horiguchiea251c12010-11-24 12:57:13 -0800745#define PAGEMAP_WALK_MASK (PMD_MASK)
Matt Mackall85863e42008-02-04 22:29:04 -0800746static ssize_t pagemap_read(struct file *file, char __user *buf,
747 size_t count, loff_t *ppos)
748{
749 struct task_struct *task = get_proc_task(file->f_path.dentry->d_inode);
Matt Mackall85863e42008-02-04 22:29:04 -0800750 struct mm_struct *mm;
751 struct pagemapread pm;
Matt Mackall85863e42008-02-04 22:29:04 -0800752 int ret = -ESRCH;
Alexey Dobriyanee1e6ab2008-07-21 14:21:36 -0700753 struct mm_walk pagemap_walk = {};
Andrew Morton5d7e0d22008-07-05 01:02:01 -0700754 unsigned long src;
755 unsigned long svpfn;
756 unsigned long start_vaddr;
757 unsigned long end_vaddr;
KAMEZAWA Hiroyukid82ef022010-04-02 09:11:29 +0900758 int copied = 0;
Matt Mackall85863e42008-02-04 22:29:04 -0800759
760 if (!task)
761 goto out;
762
763 ret = -EACCES;
Stephen Smalley006ebb42008-05-19 08:32:49 -0400764 if (!ptrace_may_access(task, PTRACE_MODE_READ))
Marcelo Tosattifb393802008-03-13 12:32:35 -0700765 goto out_task;
Matt Mackall85863e42008-02-04 22:29:04 -0800766
767 ret = -EINVAL;
768 /* file position must be aligned */
Thomas Tuttleaae86792008-06-05 22:46:31 -0700769 if ((*ppos % PM_ENTRY_BYTES) || (count % PM_ENTRY_BYTES))
Marcelo Tosattifb393802008-03-13 12:32:35 -0700770 goto out_task;
Matt Mackall85863e42008-02-04 22:29:04 -0800771
772 ret = 0;
Vitaly Mayatskikh08161782009-04-30 15:08:18 -0700773
774 if (!count)
775 goto out_task;
776
Matt Mackall85863e42008-02-04 22:29:04 -0800777 mm = get_task_mm(task);
778 if (!mm)
Marcelo Tosattifb393802008-03-13 12:32:35 -0700779 goto out_task;
Matt Mackall85863e42008-02-04 22:29:04 -0800780
KAMEZAWA Hiroyukid82ef022010-04-02 09:11:29 +0900781 pm.len = PM_ENTRY_BYTES * (PAGEMAP_WALK_SIZE >> PAGE_SHIFT);
782 pm.buffer = kmalloc(pm.len, GFP_TEMPORARY);
Andrew Morton5d7e0d22008-07-05 01:02:01 -0700783 ret = -ENOMEM;
KAMEZAWA Hiroyukid82ef022010-04-02 09:11:29 +0900784 if (!pm.buffer)
Marcelo Tosattifb393802008-03-13 12:32:35 -0700785 goto out_mm;
Matt Mackall85863e42008-02-04 22:29:04 -0800786
Andrew Morton5d7e0d22008-07-05 01:02:01 -0700787 pagemap_walk.pmd_entry = pagemap_pte_range;
788 pagemap_walk.pte_hole = pagemap_pte_hole;
Naoya Horiguchi1a5cb812010-05-24 14:32:12 -0700789#ifdef CONFIG_HUGETLB_PAGE
Naoya Horiguchi5dc37642009-12-14 18:00:01 -0800790 pagemap_walk.hugetlb_entry = pagemap_hugetlb_range;
Naoya Horiguchi1a5cb812010-05-24 14:32:12 -0700791#endif
Andrew Morton5d7e0d22008-07-05 01:02:01 -0700792 pagemap_walk.mm = mm;
793 pagemap_walk.private = &pm;
Matt Mackall85863e42008-02-04 22:29:04 -0800794
Andrew Morton5d7e0d22008-07-05 01:02:01 -0700795 src = *ppos;
796 svpfn = src / PM_ENTRY_BYTES;
797 start_vaddr = svpfn << PAGE_SHIFT;
798 end_vaddr = TASK_SIZE_OF(task);
Matt Mackall85863e42008-02-04 22:29:04 -0800799
Andrew Morton5d7e0d22008-07-05 01:02:01 -0700800 /* watch out for wraparound */
801 if (svpfn > TASK_SIZE_OF(task) >> PAGE_SHIFT)
802 start_vaddr = end_vaddr;
803
804 /*
805 * The odds are that this will stop walking way
806 * before end_vaddr, because the length of the
807 * user buffer is tracked in "pm", and the walk
808 * will stop when we hit the end of the buffer.
809 */
KAMEZAWA Hiroyukid82ef022010-04-02 09:11:29 +0900810 ret = 0;
811 while (count && (start_vaddr < end_vaddr)) {
812 int len;
813 unsigned long end;
Matt Mackall85863e42008-02-04 22:29:04 -0800814
KAMEZAWA Hiroyukid82ef022010-04-02 09:11:29 +0900815 pm.pos = 0;
Naoya Horiguchiea251c12010-11-24 12:57:13 -0800816 end = (start_vaddr + PAGEMAP_WALK_SIZE) & PAGEMAP_WALK_MASK;
KAMEZAWA Hiroyukid82ef022010-04-02 09:11:29 +0900817 /* overflow ? */
818 if (end < start_vaddr || end > end_vaddr)
819 end = end_vaddr;
820 down_read(&mm->mmap_sem);
821 ret = walk_page_range(start_vaddr, end, &pagemap_walk);
822 up_read(&mm->mmap_sem);
823 start_vaddr = end;
824
825 len = min(count, PM_ENTRY_BYTES * pm.pos);
Dan Carpenter309361e02010-04-06 13:45:39 +0300826 if (copy_to_user(buf, pm.buffer, len)) {
KAMEZAWA Hiroyukid82ef022010-04-02 09:11:29 +0900827 ret = -EFAULT;
828 goto out_free;
829 }
830 copied += len;
831 buf += len;
832 count -= len;
Matt Mackall85863e42008-02-04 22:29:04 -0800833 }
KAMEZAWA Hiroyukid82ef022010-04-02 09:11:29 +0900834 *ppos += copied;
835 if (!ret || ret == PM_END_OF_BUFFER)
836 ret = copied;
837
Matt Mackall85863e42008-02-04 22:29:04 -0800838out_free:
KAMEZAWA Hiroyukid82ef022010-04-02 09:11:29 +0900839 kfree(pm.buffer);
Marcelo Tosattifb393802008-03-13 12:32:35 -0700840out_mm:
841 mmput(mm);
Matt Mackall85863e42008-02-04 22:29:04 -0800842out_task:
843 put_task_struct(task);
844out:
845 return ret;
846}
847
848const struct file_operations proc_pagemap_operations = {
849 .llseek = mem_lseek, /* borrow this */
850 .read = pagemap_read,
851};
Matt Mackall1e883282008-02-04 22:29:07 -0800852#endif /* CONFIG_PROC_PAGE_MONITOR */
Matt Mackall85863e42008-02-04 22:29:04 -0800853
Christoph Lameter6e21c8f2005-09-03 15:54:45 -0700854#ifdef CONFIG_NUMA
Christoph Lameter1a75a6c2006-01-08 01:01:02 -0800855extern int show_numa_map(struct seq_file *m, void *v);
Christoph Lameter6e21c8f2005-09-03 15:54:45 -0700856
Jan Engelhardt03a44822008-02-08 04:21:19 -0800857static const struct seq_operations proc_pid_numa_maps_op = {
Christoph Lameter1a75a6c2006-01-08 01:01:02 -0800858 .start = m_start,
859 .next = m_next,
860 .stop = m_stop,
Alexey Dobriyan3bbfe052008-10-10 03:27:16 +0400861 .show = show_numa_map,
Christoph Lameter6e21c8f2005-09-03 15:54:45 -0700862};
Eric W. Biederman662795d2006-06-26 00:25:48 -0700863
864static int numa_maps_open(struct inode *inode, struct file *file)
865{
866 return do_maps_open(inode, file, &proc_pid_numa_maps_op);
867}
868
Arjan van de Ven00977a52007-02-12 00:55:34 -0800869const struct file_operations proc_numa_maps_operations = {
Eric W. Biederman662795d2006-06-26 00:25:48 -0700870 .open = numa_maps_open,
871 .read = seq_read,
872 .llseek = seq_lseek,
Eric W. Biederman99f89552006-06-26 00:25:55 -0700873 .release = seq_release_private,
Eric W. Biederman662795d2006-06-26 00:25:48 -0700874};
Christoph Lameter6e21c8f2005-09-03 15:54:45 -0700875#endif