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Commit | Line | Data |
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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; | |
123 | }; | |
124 | ||
125 | static int show_map_internal(struct seq_file *m, void *v, struct mem_size_stats *mss) | |
1da177e4 | 126 | { |
99f89551 EB |
127 | struct proc_maps_private *priv = m->private; |
128 | struct task_struct *task = priv->task; | |
e070ad49 ML |
129 | struct vm_area_struct *vma = v; |
130 | struct mm_struct *mm = vma->vm_mm; | |
131 | struct file *file = vma->vm_file; | |
132 | int flags = vma->vm_flags; | |
1da177e4 LT |
133 | unsigned long ino = 0; |
134 | dev_t dev = 0; | |
135 | int len; | |
136 | ||
137 | if (file) { | |
2fddfeef | 138 | struct inode *inode = vma->vm_file->f_path.dentry->d_inode; |
1da177e4 LT |
139 | dev = inode->i_sb->s_dev; |
140 | ino = inode->i_ino; | |
141 | } | |
142 | ||
143 | seq_printf(m, "%08lx-%08lx %c%c%c%c %08lx %02x:%02x %lu %n", | |
e070ad49 ML |
144 | vma->vm_start, |
145 | vma->vm_end, | |
1da177e4 LT |
146 | flags & VM_READ ? 'r' : '-', |
147 | flags & VM_WRITE ? 'w' : '-', | |
148 | flags & VM_EXEC ? 'x' : '-', | |
149 | flags & VM_MAYSHARE ? 's' : 'p', | |
e070ad49 | 150 | vma->vm_pgoff << PAGE_SHIFT, |
1da177e4 LT |
151 | MAJOR(dev), MINOR(dev), ino, &len); |
152 | ||
153 | /* | |
154 | * Print the dentry name for named mappings, and a | |
155 | * special [heap] marker for the heap: | |
156 | */ | |
e070ad49 | 157 | if (file) { |
1da177e4 | 158 | pad_len_spaces(m, len); |
2fddfeef | 159 | seq_path(m, file->f_path.mnt, file->f_path.dentry, "\n"); |
1da177e4 | 160 | } else { |
e6e5494c IM |
161 | const char *name = arch_vma_name(vma); |
162 | if (!name) { | |
163 | if (mm) { | |
164 | if (vma->vm_start <= mm->start_brk && | |
e070ad49 | 165 | vma->vm_end >= mm->brk) { |
e6e5494c IM |
166 | name = "[heap]"; |
167 | } else if (vma->vm_start <= mm->start_stack && | |
168 | vma->vm_end >= mm->start_stack) { | |
169 | name = "[stack]"; | |
1da177e4 | 170 | } |
e6e5494c IM |
171 | } else { |
172 | name = "[vdso]"; | |
1da177e4 | 173 | } |
e6e5494c IM |
174 | } |
175 | if (name) { | |
1da177e4 | 176 | pad_len_spaces(m, len); |
e6e5494c | 177 | seq_puts(m, name); |
1da177e4 LT |
178 | } |
179 | } | |
180 | seq_putc(m, '\n'); | |
e070ad49 ML |
181 | |
182 | if (mss) | |
183 | seq_printf(m, | |
184 | "Size: %8lu kB\n" | |
185 | "Rss: %8lu kB\n" | |
186 | "Shared_Clean: %8lu kB\n" | |
187 | "Shared_Dirty: %8lu kB\n" | |
188 | "Private_Clean: %8lu kB\n" | |
189 | "Private_Dirty: %8lu kB\n", | |
190 | (vma->vm_end - vma->vm_start) >> 10, | |
191 | mss->resident >> 10, | |
192 | mss->shared_clean >> 10, | |
193 | mss->shared_dirty >> 10, | |
194 | mss->private_clean >> 10, | |
195 | mss->private_dirty >> 10); | |
196 | ||
197 | if (m->count < m->size) /* vma is copied successfully */ | |
198 | m->version = (vma != get_gate_vma(task))? vma->vm_start: 0; | |
1da177e4 LT |
199 | return 0; |
200 | } | |
201 | ||
e070ad49 ML |
202 | static int show_map(struct seq_file *m, void *v) |
203 | { | |
0f5c79f2 | 204 | return show_map_internal(m, v, NULL); |
e070ad49 ML |
205 | } |
206 | ||
207 | static void smaps_pte_range(struct vm_area_struct *vma, pmd_t *pmd, | |
208 | unsigned long addr, unsigned long end, | |
209 | struct mem_size_stats *mss) | |
210 | { | |
211 | pte_t *pte, ptent; | |
705e87c0 | 212 | spinlock_t *ptl; |
e070ad49 ML |
213 | struct page *page; |
214 | ||
705e87c0 | 215 | pte = pte_offset_map_lock(vma->vm_mm, pmd, addr, &ptl); |
e070ad49 ML |
216 | do { |
217 | ptent = *pte; | |
705e87c0 | 218 | if (!pte_present(ptent)) |
e070ad49 ML |
219 | continue; |
220 | ||
221 | mss->resident += PAGE_SIZE; | |
ad820c5d NP |
222 | |
223 | page = vm_normal_page(vma, addr, ptent); | |
224 | if (!page) | |
e070ad49 ML |
225 | continue; |
226 | ||
ad820c5d | 227 | if (page_mapcount(page) >= 2) { |
e070ad49 ML |
228 | if (pte_dirty(ptent)) |
229 | mss->shared_dirty += PAGE_SIZE; | |
230 | else | |
231 | mss->shared_clean += PAGE_SIZE; | |
232 | } else { | |
233 | if (pte_dirty(ptent)) | |
234 | mss->private_dirty += PAGE_SIZE; | |
235 | else | |
236 | mss->private_clean += PAGE_SIZE; | |
237 | } | |
238 | } while (pte++, addr += PAGE_SIZE, addr != end); | |
705e87c0 HD |
239 | pte_unmap_unlock(pte - 1, ptl); |
240 | cond_resched(); | |
e070ad49 ML |
241 | } |
242 | ||
243 | static inline void smaps_pmd_range(struct vm_area_struct *vma, pud_t *pud, | |
244 | unsigned long addr, unsigned long end, | |
245 | struct mem_size_stats *mss) | |
246 | { | |
247 | pmd_t *pmd; | |
248 | unsigned long next; | |
249 | ||
250 | pmd = pmd_offset(pud, addr); | |
251 | do { | |
252 | next = pmd_addr_end(addr, end); | |
253 | if (pmd_none_or_clear_bad(pmd)) | |
254 | continue; | |
255 | smaps_pte_range(vma, pmd, addr, next, mss); | |
256 | } while (pmd++, addr = next, addr != end); | |
257 | } | |
258 | ||
259 | static inline void smaps_pud_range(struct vm_area_struct *vma, pgd_t *pgd, | |
260 | unsigned long addr, unsigned long end, | |
261 | struct mem_size_stats *mss) | |
262 | { | |
263 | pud_t *pud; | |
264 | unsigned long next; | |
265 | ||
266 | pud = pud_offset(pgd, addr); | |
267 | do { | |
268 | next = pud_addr_end(addr, end); | |
269 | if (pud_none_or_clear_bad(pud)) | |
270 | continue; | |
271 | smaps_pmd_range(vma, pud, addr, next, mss); | |
272 | } while (pud++, addr = next, addr != end); | |
273 | } | |
274 | ||
275 | static inline void smaps_pgd_range(struct vm_area_struct *vma, | |
276 | unsigned long addr, unsigned long end, | |
277 | struct mem_size_stats *mss) | |
278 | { | |
279 | pgd_t *pgd; | |
280 | unsigned long next; | |
281 | ||
282 | pgd = pgd_offset(vma->vm_mm, addr); | |
283 | do { | |
284 | next = pgd_addr_end(addr, end); | |
285 | if (pgd_none_or_clear_bad(pgd)) | |
286 | continue; | |
287 | smaps_pud_range(vma, pgd, addr, next, mss); | |
288 | } while (pgd++, addr = next, addr != end); | |
289 | } | |
290 | ||
291 | static int show_smap(struct seq_file *m, void *v) | |
292 | { | |
293 | struct vm_area_struct *vma = v; | |
e070ad49 ML |
294 | struct mem_size_stats mss; |
295 | ||
296 | memset(&mss, 0, sizeof mss); | |
5ddfae16 | 297 | if (vma->vm_mm && !is_vm_hugetlb_page(vma)) |
e070ad49 | 298 | smaps_pgd_range(vma, vma->vm_start, vma->vm_end, &mss); |
e070ad49 ML |
299 | return show_map_internal(m, v, &mss); |
300 | } | |
301 | ||
1da177e4 LT |
302 | static void *m_start(struct seq_file *m, loff_t *pos) |
303 | { | |
99f89551 | 304 | struct proc_maps_private *priv = m->private; |
1da177e4 LT |
305 | unsigned long last_addr = m->version; |
306 | struct mm_struct *mm; | |
99f89551 | 307 | struct vm_area_struct *vma, *tail_vma = NULL; |
1da177e4 LT |
308 | loff_t l = *pos; |
309 | ||
99f89551 EB |
310 | /* Clear the per syscall fields in priv */ |
311 | priv->task = NULL; | |
312 | priv->tail_vma = NULL; | |
313 | ||
1da177e4 LT |
314 | /* |
315 | * We remember last_addr rather than next_addr to hit with | |
316 | * mmap_cache most of the time. We have zero last_addr at | |
e070ad49 ML |
317 | * the beginning and also after lseek. We will have -1 last_addr |
318 | * after the end of the vmas. | |
1da177e4 LT |
319 | */ |
320 | ||
321 | if (last_addr == -1UL) | |
322 | return NULL; | |
323 | ||
13b41b09 | 324 | priv->task = get_pid_task(priv->pid, PIDTYPE_PID); |
99f89551 EB |
325 | if (!priv->task) |
326 | return NULL; | |
327 | ||
328 | mm = get_task_mm(priv->task); | |
1da177e4 LT |
329 | if (!mm) |
330 | return NULL; | |
331 | ||
99f89551 | 332 | priv->tail_vma = tail_vma = get_gate_vma(priv->task); |
1da177e4 LT |
333 | down_read(&mm->mmap_sem); |
334 | ||
335 | /* Start with last addr hint */ | |
e070ad49 ML |
336 | if (last_addr && (vma = find_vma(mm, last_addr))) { |
337 | vma = vma->vm_next; | |
1da177e4 LT |
338 | goto out; |
339 | } | |
340 | ||
341 | /* | |
e070ad49 | 342 | * Check the vma index is within the range and do |
1da177e4 LT |
343 | * sequential scan until m_index. |
344 | */ | |
e070ad49 | 345 | vma = NULL; |
1da177e4 | 346 | if ((unsigned long)l < mm->map_count) { |
e070ad49 ML |
347 | vma = mm->mmap; |
348 | while (l-- && vma) | |
349 | vma = vma->vm_next; | |
1da177e4 LT |
350 | goto out; |
351 | } | |
352 | ||
353 | if (l != mm->map_count) | |
e070ad49 | 354 | tail_vma = NULL; /* After gate vma */ |
1da177e4 LT |
355 | |
356 | out: | |
e070ad49 ML |
357 | if (vma) |
358 | return vma; | |
1da177e4 | 359 | |
e070ad49 ML |
360 | /* End of vmas has been reached */ |
361 | m->version = (tail_vma != NULL)? 0: -1UL; | |
1da177e4 LT |
362 | up_read(&mm->mmap_sem); |
363 | mmput(mm); | |
e070ad49 | 364 | return tail_vma; |
1da177e4 LT |
365 | } |
366 | ||
99f89551 | 367 | static void vma_stop(struct proc_maps_private *priv, struct vm_area_struct *vma) |
1da177e4 | 368 | { |
99f89551 | 369 | if (vma && vma != priv->tail_vma) { |
e070ad49 | 370 | struct mm_struct *mm = vma->vm_mm; |
1da177e4 LT |
371 | up_read(&mm->mmap_sem); |
372 | mmput(mm); | |
373 | } | |
374 | } | |
375 | ||
376 | static void *m_next(struct seq_file *m, void *v, loff_t *pos) | |
377 | { | |
99f89551 | 378 | struct proc_maps_private *priv = m->private; |
e070ad49 | 379 | struct vm_area_struct *vma = v; |
99f89551 | 380 | struct vm_area_struct *tail_vma = priv->tail_vma; |
1da177e4 LT |
381 | |
382 | (*pos)++; | |
e070ad49 ML |
383 | if (vma && (vma != tail_vma) && vma->vm_next) |
384 | return vma->vm_next; | |
99f89551 | 385 | vma_stop(priv, vma); |
e070ad49 | 386 | return (vma != tail_vma)? tail_vma: NULL; |
1da177e4 LT |
387 | } |
388 | ||
99f89551 EB |
389 | static void m_stop(struct seq_file *m, void *v) |
390 | { | |
391 | struct proc_maps_private *priv = m->private; | |
392 | struct vm_area_struct *vma = v; | |
393 | ||
394 | vma_stop(priv, vma); | |
395 | if (priv->task) | |
396 | put_task_struct(priv->task); | |
397 | } | |
398 | ||
662795de | 399 | static struct seq_operations proc_pid_maps_op = { |
1da177e4 LT |
400 | .start = m_start, |
401 | .next = m_next, | |
402 | .stop = m_stop, | |
403 | .show = show_map | |
404 | }; | |
6e21c8f1 | 405 | |
662795de | 406 | static struct seq_operations proc_pid_smaps_op = { |
e070ad49 ML |
407 | .start = m_start, |
408 | .next = m_next, | |
409 | .stop = m_stop, | |
410 | .show = show_smap | |
411 | }; | |
412 | ||
662795de EB |
413 | static int do_maps_open(struct inode *inode, struct file *file, |
414 | struct seq_operations *ops) | |
415 | { | |
99f89551 EB |
416 | struct proc_maps_private *priv; |
417 | int ret = -ENOMEM; | |
418 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); | |
419 | if (priv) { | |
13b41b09 | 420 | priv->pid = proc_pid(inode); |
99f89551 EB |
421 | ret = seq_open(file, ops); |
422 | if (!ret) { | |
423 | struct seq_file *m = file->private_data; | |
424 | m->private = priv; | |
425 | } else { | |
426 | kfree(priv); | |
427 | } | |
662795de EB |
428 | } |
429 | return ret; | |
430 | } | |
431 | ||
432 | static int maps_open(struct inode *inode, struct file *file) | |
433 | { | |
434 | return do_maps_open(inode, file, &proc_pid_maps_op); | |
435 | } | |
436 | ||
437 | struct file_operations proc_maps_operations = { | |
438 | .open = maps_open, | |
439 | .read = seq_read, | |
440 | .llseek = seq_lseek, | |
99f89551 | 441 | .release = seq_release_private, |
662795de EB |
442 | }; |
443 | ||
6e21c8f1 | 444 | #ifdef CONFIG_NUMA |
1a75a6c8 | 445 | extern int show_numa_map(struct seq_file *m, void *v); |
6e21c8f1 | 446 | |
662795de | 447 | static struct seq_operations proc_pid_numa_maps_op = { |
1a75a6c8 CL |
448 | .start = m_start, |
449 | .next = m_next, | |
450 | .stop = m_stop, | |
451 | .show = show_numa_map | |
6e21c8f1 | 452 | }; |
662795de EB |
453 | |
454 | static int numa_maps_open(struct inode *inode, struct file *file) | |
455 | { | |
456 | return do_maps_open(inode, file, &proc_pid_numa_maps_op); | |
457 | } | |
458 | ||
459 | struct file_operations proc_numa_maps_operations = { | |
460 | .open = numa_maps_open, | |
461 | .read = seq_read, | |
462 | .llseek = seq_lseek, | |
99f89551 | 463 | .release = seq_release_private, |
662795de | 464 | }; |
6e21c8f1 | 465 | #endif |
662795de EB |
466 | |
467 | static int smaps_open(struct inode *inode, struct file *file) | |
468 | { | |
469 | return do_maps_open(inode, file, &proc_pid_smaps_op); | |
470 | } | |
471 | ||
472 | struct file_operations proc_smaps_operations = { | |
473 | .open = smaps_open, | |
474 | .read = seq_read, | |
475 | .llseek = seq_lseek, | |
99f89551 | 476 | .release = seq_release_private, |
662795de | 477 | }; |