Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | #include <linux/mm.h> |
2 | #include <linux/hugetlb.h> | |
3 | #include <linux/mount.h> | |
4 | #include <linux/seq_file.h> | |
e070ad49 | 5 | #include <linux/highmem.h> |
6e21c8f1 CL |
6 | #include <linux/pagemap.h> |
7 | #include <linux/mempolicy.h> | |
e070ad49 | 8 | |
1da177e4 LT |
9 | #include <asm/elf.h> |
10 | #include <asm/uaccess.h> | |
e070ad49 | 11 | #include <asm/tlbflush.h> |
1da177e4 LT |
12 | #include "internal.h" |
13 | ||
14 | char *task_mem(struct mm_struct *mm, char *buffer) | |
15 | { | |
16 | unsigned long data, text, lib; | |
365e9c87 HD |
17 | unsigned long hiwater_vm, total_vm, hiwater_rss, total_rss; |
18 | ||
19 | /* | |
20 | * Note: to minimize their overhead, mm maintains hiwater_vm and | |
21 | * hiwater_rss only when about to *lower* total_vm or rss. Any | |
22 | * collector of these hiwater stats must therefore get total_vm | |
23 | * and rss too, which will usually be the higher. Barriers? not | |
24 | * worth the effort, such snapshots can always be inconsistent. | |
25 | */ | |
26 | hiwater_vm = total_vm = mm->total_vm; | |
27 | if (hiwater_vm < mm->hiwater_vm) | |
28 | hiwater_vm = mm->hiwater_vm; | |
29 | hiwater_rss = total_rss = get_mm_rss(mm); | |
30 | if (hiwater_rss < mm->hiwater_rss) | |
31 | hiwater_rss = mm->hiwater_rss; | |
1da177e4 LT |
32 | |
33 | data = mm->total_vm - mm->shared_vm - mm->stack_vm; | |
34 | text = (PAGE_ALIGN(mm->end_code) - (mm->start_code & PAGE_MASK)) >> 10; | |
35 | lib = (mm->exec_vm << (PAGE_SHIFT-10)) - text; | |
36 | buffer += sprintf(buffer, | |
365e9c87 | 37 | "VmPeak:\t%8lu kB\n" |
1da177e4 LT |
38 | "VmSize:\t%8lu kB\n" |
39 | "VmLck:\t%8lu kB\n" | |
365e9c87 | 40 | "VmHWM:\t%8lu kB\n" |
1da177e4 LT |
41 | "VmRSS:\t%8lu kB\n" |
42 | "VmData:\t%8lu kB\n" | |
43 | "VmStk:\t%8lu kB\n" | |
44 | "VmExe:\t%8lu kB\n" | |
45 | "VmLib:\t%8lu kB\n" | |
46 | "VmPTE:\t%8lu kB\n", | |
365e9c87 HD |
47 | hiwater_vm << (PAGE_SHIFT-10), |
48 | (total_vm - mm->reserved_vm) << (PAGE_SHIFT-10), | |
1da177e4 | 49 | mm->locked_vm << (PAGE_SHIFT-10), |
365e9c87 HD |
50 | hiwater_rss << (PAGE_SHIFT-10), |
51 | total_rss << (PAGE_SHIFT-10), | |
1da177e4 LT |
52 | data << (PAGE_SHIFT-10), |
53 | mm->stack_vm << (PAGE_SHIFT-10), text, lib, | |
54 | (PTRS_PER_PTE*sizeof(pte_t)*mm->nr_ptes) >> 10); | |
55 | return buffer; | |
56 | } | |
57 | ||
58 | unsigned long task_vsize(struct mm_struct *mm) | |
59 | { | |
60 | return PAGE_SIZE * mm->total_vm; | |
61 | } | |
62 | ||
63 | int task_statm(struct mm_struct *mm, int *shared, int *text, | |
64 | int *data, int *resident) | |
65 | { | |
4294621f | 66 | *shared = get_mm_counter(mm, file_rss); |
1da177e4 LT |
67 | *text = (PAGE_ALIGN(mm->end_code) - (mm->start_code & PAGE_MASK)) |
68 | >> PAGE_SHIFT; | |
69 | *data = mm->total_vm - mm->shared_vm; | |
4294621f | 70 | *resident = *shared + get_mm_counter(mm, anon_rss); |
1da177e4 LT |
71 | return mm->total_vm; |
72 | } | |
73 | ||
74 | int proc_exe_link(struct inode *inode, struct dentry **dentry, struct vfsmount **mnt) | |
75 | { | |
76 | struct vm_area_struct * vma; | |
77 | int result = -ENOENT; | |
99f89551 EB |
78 | struct task_struct *task = get_proc_task(inode); |
79 | struct mm_struct * mm = NULL; | |
1da177e4 | 80 | |
99f89551 EB |
81 | if (task) { |
82 | mm = get_task_mm(task); | |
83 | put_task_struct(task); | |
84 | } | |
1da177e4 LT |
85 | if (!mm) |
86 | goto out; | |
87 | down_read(&mm->mmap_sem); | |
88 | ||
89 | vma = mm->mmap; | |
90 | while (vma) { | |
91 | if ((vma->vm_flags & VM_EXECUTABLE) && vma->vm_file) | |
92 | break; | |
93 | vma = vma->vm_next; | |
94 | } | |
95 | ||
96 | if (vma) { | |
2fddfeef JJS |
97 | *mnt = mntget(vma->vm_file->f_path.mnt); |
98 | *dentry = dget(vma->vm_file->f_path.dentry); | |
1da177e4 LT |
99 | result = 0; |
100 | } | |
101 | ||
102 | up_read(&mm->mmap_sem); | |
103 | mmput(mm); | |
104 | out: | |
105 | return result; | |
106 | } | |
107 | ||
108 | static void pad_len_spaces(struct seq_file *m, int len) | |
109 | { | |
110 | len = 25 + sizeof(void*) * 6 - len; | |
111 | if (len < 1) | |
112 | len = 1; | |
113 | seq_printf(m, "%*c", len, ' '); | |
114 | } | |
115 | ||
e070ad49 ML |
116 | struct mem_size_stats |
117 | { | |
118 | unsigned long resident; | |
119 | unsigned long shared_clean; | |
120 | unsigned long shared_dirty; | |
121 | unsigned long private_clean; | |
122 | unsigned long private_dirty; | |
f79f177c | 123 | unsigned long referenced; |
e070ad49 ML |
124 | }; |
125 | ||
826fad1b DR |
126 | struct pmd_walker { |
127 | struct vm_area_struct *vma; | |
128 | void *private; | |
129 | void (*action)(struct vm_area_struct *, pmd_t *, unsigned long, | |
130 | unsigned long, void *); | |
131 | }; | |
132 | ||
e070ad49 | 133 | static int show_map_internal(struct seq_file *m, void *v, struct mem_size_stats *mss) |
1da177e4 | 134 | { |
99f89551 EB |
135 | struct proc_maps_private *priv = m->private; |
136 | struct task_struct *task = priv->task; | |
e070ad49 ML |
137 | struct vm_area_struct *vma = v; |
138 | struct mm_struct *mm = vma->vm_mm; | |
139 | struct file *file = vma->vm_file; | |
140 | int flags = vma->vm_flags; | |
1da177e4 LT |
141 | unsigned long ino = 0; |
142 | dev_t dev = 0; | |
143 | int len; | |
144 | ||
145 | if (file) { | |
2fddfeef | 146 | struct inode *inode = vma->vm_file->f_path.dentry->d_inode; |
1da177e4 LT |
147 | dev = inode->i_sb->s_dev; |
148 | ino = inode->i_ino; | |
149 | } | |
150 | ||
151 | seq_printf(m, "%08lx-%08lx %c%c%c%c %08lx %02x:%02x %lu %n", | |
e070ad49 ML |
152 | vma->vm_start, |
153 | vma->vm_end, | |
1da177e4 LT |
154 | flags & VM_READ ? 'r' : '-', |
155 | flags & VM_WRITE ? 'w' : '-', | |
156 | flags & VM_EXEC ? 'x' : '-', | |
157 | flags & VM_MAYSHARE ? 's' : 'p', | |
e070ad49 | 158 | vma->vm_pgoff << PAGE_SHIFT, |
1da177e4 LT |
159 | MAJOR(dev), MINOR(dev), ino, &len); |
160 | ||
161 | /* | |
162 | * Print the dentry name for named mappings, and a | |
163 | * special [heap] marker for the heap: | |
164 | */ | |
e070ad49 | 165 | if (file) { |
1da177e4 | 166 | pad_len_spaces(m, len); |
2fddfeef | 167 | seq_path(m, file->f_path.mnt, file->f_path.dentry, "\n"); |
1da177e4 | 168 | } else { |
e6e5494c IM |
169 | const char *name = arch_vma_name(vma); |
170 | if (!name) { | |
171 | if (mm) { | |
172 | if (vma->vm_start <= mm->start_brk && | |
e070ad49 | 173 | vma->vm_end >= mm->brk) { |
e6e5494c IM |
174 | name = "[heap]"; |
175 | } else if (vma->vm_start <= mm->start_stack && | |
176 | vma->vm_end >= mm->start_stack) { | |
177 | name = "[stack]"; | |
1da177e4 | 178 | } |
e6e5494c IM |
179 | } else { |
180 | name = "[vdso]"; | |
1da177e4 | 181 | } |
e6e5494c IM |
182 | } |
183 | if (name) { | |
1da177e4 | 184 | pad_len_spaces(m, len); |
e6e5494c | 185 | seq_puts(m, name); |
1da177e4 LT |
186 | } |
187 | } | |
188 | seq_putc(m, '\n'); | |
e070ad49 ML |
189 | |
190 | if (mss) | |
191 | seq_printf(m, | |
f79f177c DR |
192 | "Size: %8lu kB\n" |
193 | "Rss: %8lu kB\n" | |
194 | "Shared_Clean: %8lu kB\n" | |
195 | "Shared_Dirty: %8lu kB\n" | |
196 | "Private_Clean: %8lu kB\n" | |
197 | "Private_Dirty: %8lu kB\n" | |
198 | "Pgs_Referenced: %8lu kB\n", | |
e070ad49 ML |
199 | (vma->vm_end - vma->vm_start) >> 10, |
200 | mss->resident >> 10, | |
201 | mss->shared_clean >> 10, | |
202 | mss->shared_dirty >> 10, | |
203 | mss->private_clean >> 10, | |
f79f177c DR |
204 | mss->private_dirty >> 10, |
205 | mss->referenced >> 10); | |
e070ad49 ML |
206 | |
207 | if (m->count < m->size) /* vma is copied successfully */ | |
208 | m->version = (vma != get_gate_vma(task))? vma->vm_start: 0; | |
1da177e4 LT |
209 | return 0; |
210 | } | |
211 | ||
e070ad49 ML |
212 | static int show_map(struct seq_file *m, void *v) |
213 | { | |
0f5c79f2 | 214 | return show_map_internal(m, v, NULL); |
e070ad49 ML |
215 | } |
216 | ||
826fad1b DR |
217 | static void smaps_one_pmd(struct vm_area_struct *vma, pmd_t *pmd, |
218 | unsigned long addr, unsigned long end, | |
219 | void *private) | |
e070ad49 | 220 | { |
826fad1b | 221 | struct mem_size_stats *mss = private; |
e070ad49 | 222 | pte_t *pte, ptent; |
705e87c0 | 223 | spinlock_t *ptl; |
e070ad49 ML |
224 | struct page *page; |
225 | ||
705e87c0 | 226 | pte = pte_offset_map_lock(vma->vm_mm, pmd, addr, &ptl); |
826fad1b | 227 | for (; addr != end; pte++, addr += PAGE_SIZE) { |
e070ad49 | 228 | ptent = *pte; |
705e87c0 | 229 | if (!pte_present(ptent)) |
e070ad49 ML |
230 | continue; |
231 | ||
232 | mss->resident += PAGE_SIZE; | |
ad820c5d NP |
233 | |
234 | page = vm_normal_page(vma, addr, ptent); | |
235 | if (!page) | |
e070ad49 ML |
236 | continue; |
237 | ||
f79f177c DR |
238 | /* Accumulate the size in pages that have been accessed. */ |
239 | if (pte_young(ptent) || PageReferenced(page)) | |
240 | mss->referenced += PAGE_SIZE; | |
ad820c5d | 241 | if (page_mapcount(page) >= 2) { |
e070ad49 ML |
242 | if (pte_dirty(ptent)) |
243 | mss->shared_dirty += PAGE_SIZE; | |
244 | else | |
245 | mss->shared_clean += PAGE_SIZE; | |
246 | } else { | |
247 | if (pte_dirty(ptent)) | |
248 | mss->private_dirty += PAGE_SIZE; | |
249 | else | |
250 | mss->private_clean += PAGE_SIZE; | |
251 | } | |
826fad1b | 252 | } |
705e87c0 HD |
253 | pte_unmap_unlock(pte - 1, ptl); |
254 | cond_resched(); | |
e070ad49 ML |
255 | } |
256 | ||
826fad1b DR |
257 | static inline void for_each_pmd_in_pud(struct pmd_walker *walker, pud_t *pud, |
258 | unsigned long addr, unsigned long end) | |
e070ad49 ML |
259 | { |
260 | pmd_t *pmd; | |
261 | unsigned long next; | |
262 | ||
826fad1b DR |
263 | for (pmd = pmd_offset(pud, addr); addr != end; |
264 | pmd++, addr = next) { | |
e070ad49 ML |
265 | next = pmd_addr_end(addr, end); |
266 | if (pmd_none_or_clear_bad(pmd)) | |
267 | continue; | |
826fad1b DR |
268 | walker->action(walker->vma, pmd, addr, next, walker->private); |
269 | } | |
e070ad49 ML |
270 | } |
271 | ||
826fad1b DR |
272 | static inline void for_each_pud_in_pgd(struct pmd_walker *walker, pgd_t *pgd, |
273 | unsigned long addr, unsigned long end) | |
e070ad49 ML |
274 | { |
275 | pud_t *pud; | |
276 | unsigned long next; | |
277 | ||
826fad1b DR |
278 | for (pud = pud_offset(pgd, addr); addr != end; |
279 | pud++, addr = next) { | |
e070ad49 ML |
280 | next = pud_addr_end(addr, end); |
281 | if (pud_none_or_clear_bad(pud)) | |
282 | continue; | |
826fad1b DR |
283 | for_each_pmd_in_pud(walker, pud, addr, next); |
284 | } | |
e070ad49 ML |
285 | } |
286 | ||
826fad1b DR |
287 | static inline void for_each_pmd(struct vm_area_struct *vma, |
288 | void (*action)(struct vm_area_struct *, pmd_t *, | |
289 | unsigned long, unsigned long, | |
290 | void *), | |
291 | void *private) | |
e070ad49 | 292 | { |
826fad1b DR |
293 | unsigned long addr = vma->vm_start; |
294 | unsigned long end = vma->vm_end; | |
295 | struct pmd_walker walker = { | |
296 | .vma = vma, | |
297 | .private = private, | |
298 | .action = action, | |
299 | }; | |
e070ad49 ML |
300 | pgd_t *pgd; |
301 | unsigned long next; | |
302 | ||
826fad1b DR |
303 | for (pgd = pgd_offset(vma->vm_mm, addr); addr != end; |
304 | pgd++, addr = next) { | |
e070ad49 ML |
305 | next = pgd_addr_end(addr, end); |
306 | if (pgd_none_or_clear_bad(pgd)) | |
307 | continue; | |
826fad1b DR |
308 | for_each_pud_in_pgd(&walker, pgd, addr, next); |
309 | } | |
e070ad49 ML |
310 | } |
311 | ||
312 | static int show_smap(struct seq_file *m, void *v) | |
313 | { | |
314 | struct vm_area_struct *vma = v; | |
e070ad49 ML |
315 | struct mem_size_stats mss; |
316 | ||
317 | memset(&mss, 0, sizeof mss); | |
5ddfae16 | 318 | if (vma->vm_mm && !is_vm_hugetlb_page(vma)) |
826fad1b | 319 | for_each_pmd(vma, smaps_one_pmd, &mss); |
e070ad49 ML |
320 | return show_map_internal(m, v, &mss); |
321 | } | |
322 | ||
1da177e4 LT |
323 | static void *m_start(struct seq_file *m, loff_t *pos) |
324 | { | |
99f89551 | 325 | struct proc_maps_private *priv = m->private; |
1da177e4 LT |
326 | unsigned long last_addr = m->version; |
327 | struct mm_struct *mm; | |
99f89551 | 328 | struct vm_area_struct *vma, *tail_vma = NULL; |
1da177e4 LT |
329 | loff_t l = *pos; |
330 | ||
99f89551 EB |
331 | /* Clear the per syscall fields in priv */ |
332 | priv->task = NULL; | |
333 | priv->tail_vma = NULL; | |
334 | ||
1da177e4 LT |
335 | /* |
336 | * We remember last_addr rather than next_addr to hit with | |
337 | * mmap_cache most of the time. We have zero last_addr at | |
e070ad49 ML |
338 | * the beginning and also after lseek. We will have -1 last_addr |
339 | * after the end of the vmas. | |
1da177e4 LT |
340 | */ |
341 | ||
342 | if (last_addr == -1UL) | |
343 | return NULL; | |
344 | ||
13b41b09 | 345 | priv->task = get_pid_task(priv->pid, PIDTYPE_PID); |
99f89551 EB |
346 | if (!priv->task) |
347 | return NULL; | |
348 | ||
349 | mm = get_task_mm(priv->task); | |
1da177e4 LT |
350 | if (!mm) |
351 | return NULL; | |
352 | ||
99f89551 | 353 | priv->tail_vma = tail_vma = get_gate_vma(priv->task); |
1da177e4 LT |
354 | down_read(&mm->mmap_sem); |
355 | ||
356 | /* Start with last addr hint */ | |
e070ad49 ML |
357 | if (last_addr && (vma = find_vma(mm, last_addr))) { |
358 | vma = vma->vm_next; | |
1da177e4 LT |
359 | goto out; |
360 | } | |
361 | ||
362 | /* | |
e070ad49 | 363 | * Check the vma index is within the range and do |
1da177e4 LT |
364 | * sequential scan until m_index. |
365 | */ | |
e070ad49 | 366 | vma = NULL; |
1da177e4 | 367 | if ((unsigned long)l < mm->map_count) { |
e070ad49 ML |
368 | vma = mm->mmap; |
369 | while (l-- && vma) | |
370 | vma = vma->vm_next; | |
1da177e4 LT |
371 | goto out; |
372 | } | |
373 | ||
374 | if (l != mm->map_count) | |
e070ad49 | 375 | tail_vma = NULL; /* After gate vma */ |
1da177e4 LT |
376 | |
377 | out: | |
e070ad49 ML |
378 | if (vma) |
379 | return vma; | |
1da177e4 | 380 | |
e070ad49 ML |
381 | /* End of vmas has been reached */ |
382 | m->version = (tail_vma != NULL)? 0: -1UL; | |
1da177e4 LT |
383 | up_read(&mm->mmap_sem); |
384 | mmput(mm); | |
e070ad49 | 385 | return tail_vma; |
1da177e4 LT |
386 | } |
387 | ||
99f89551 | 388 | static void vma_stop(struct proc_maps_private *priv, struct vm_area_struct *vma) |
1da177e4 | 389 | { |
99f89551 | 390 | if (vma && vma != priv->tail_vma) { |
e070ad49 | 391 | struct mm_struct *mm = vma->vm_mm; |
1da177e4 LT |
392 | up_read(&mm->mmap_sem); |
393 | mmput(mm); | |
394 | } | |
395 | } | |
396 | ||
397 | static void *m_next(struct seq_file *m, void *v, loff_t *pos) | |
398 | { | |
99f89551 | 399 | struct proc_maps_private *priv = m->private; |
e070ad49 | 400 | struct vm_area_struct *vma = v; |
99f89551 | 401 | struct vm_area_struct *tail_vma = priv->tail_vma; |
1da177e4 LT |
402 | |
403 | (*pos)++; | |
e070ad49 ML |
404 | if (vma && (vma != tail_vma) && vma->vm_next) |
405 | return vma->vm_next; | |
99f89551 | 406 | vma_stop(priv, vma); |
e070ad49 | 407 | return (vma != tail_vma)? tail_vma: NULL; |
1da177e4 LT |
408 | } |
409 | ||
99f89551 EB |
410 | static void m_stop(struct seq_file *m, void *v) |
411 | { | |
412 | struct proc_maps_private *priv = m->private; | |
413 | struct vm_area_struct *vma = v; | |
414 | ||
415 | vma_stop(priv, vma); | |
416 | if (priv->task) | |
417 | put_task_struct(priv->task); | |
418 | } | |
419 | ||
662795de | 420 | static struct seq_operations proc_pid_maps_op = { |
1da177e4 LT |
421 | .start = m_start, |
422 | .next = m_next, | |
423 | .stop = m_stop, | |
424 | .show = show_map | |
425 | }; | |
6e21c8f1 | 426 | |
662795de | 427 | static struct seq_operations proc_pid_smaps_op = { |
e070ad49 ML |
428 | .start = m_start, |
429 | .next = m_next, | |
430 | .stop = m_stop, | |
431 | .show = show_smap | |
432 | }; | |
433 | ||
662795de EB |
434 | static int do_maps_open(struct inode *inode, struct file *file, |
435 | struct seq_operations *ops) | |
436 | { | |
99f89551 EB |
437 | struct proc_maps_private *priv; |
438 | int ret = -ENOMEM; | |
439 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); | |
440 | if (priv) { | |
13b41b09 | 441 | priv->pid = proc_pid(inode); |
99f89551 EB |
442 | ret = seq_open(file, ops); |
443 | if (!ret) { | |
444 | struct seq_file *m = file->private_data; | |
445 | m->private = priv; | |
446 | } else { | |
447 | kfree(priv); | |
448 | } | |
662795de EB |
449 | } |
450 | return ret; | |
451 | } | |
452 | ||
453 | static int maps_open(struct inode *inode, struct file *file) | |
454 | { | |
455 | return do_maps_open(inode, file, &proc_pid_maps_op); | |
456 | } | |
457 | ||
00977a59 | 458 | const struct file_operations proc_maps_operations = { |
662795de EB |
459 | .open = maps_open, |
460 | .read = seq_read, | |
461 | .llseek = seq_lseek, | |
99f89551 | 462 | .release = seq_release_private, |
662795de EB |
463 | }; |
464 | ||
6e21c8f1 | 465 | #ifdef CONFIG_NUMA |
1a75a6c8 | 466 | extern int show_numa_map(struct seq_file *m, void *v); |
6e21c8f1 | 467 | |
662795de | 468 | static struct seq_operations proc_pid_numa_maps_op = { |
1a75a6c8 CL |
469 | .start = m_start, |
470 | .next = m_next, | |
471 | .stop = m_stop, | |
472 | .show = show_numa_map | |
6e21c8f1 | 473 | }; |
662795de EB |
474 | |
475 | static int numa_maps_open(struct inode *inode, struct file *file) | |
476 | { | |
477 | return do_maps_open(inode, file, &proc_pid_numa_maps_op); | |
478 | } | |
479 | ||
00977a59 | 480 | const struct file_operations proc_numa_maps_operations = { |
662795de EB |
481 | .open = numa_maps_open, |
482 | .read = seq_read, | |
483 | .llseek = seq_lseek, | |
99f89551 | 484 | .release = seq_release_private, |
662795de | 485 | }; |
6e21c8f1 | 486 | #endif |
662795de EB |
487 | |
488 | static int smaps_open(struct inode *inode, struct file *file) | |
489 | { | |
490 | return do_maps_open(inode, file, &proc_pid_smaps_op); | |
491 | } | |
492 | ||
00977a59 | 493 | const struct file_operations proc_smaps_operations = { |
662795de EB |
494 | .open = smaps_open, |
495 | .read = seq_read, | |
496 | .llseek = seq_lseek, | |
99f89551 | 497 | .release = seq_release_private, |
662795de | 498 | }; |