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