Commit | Line | Data |
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1da177e4 LT |
1 | #include <linux/mm.h> |
2 | #include <linux/hugetlb.h> | |
22e057c5 | 3 | #include <linux/huge_mm.h> |
1da177e4 LT |
4 | #include <linux/mount.h> |
5 | #include <linux/seq_file.h> | |
e070ad49 | 6 | #include <linux/highmem.h> |
5096add8 | 7 | #include <linux/ptrace.h> |
5a0e3ad6 | 8 | #include <linux/slab.h> |
6e21c8f1 CL |
9 | #include <linux/pagemap.h> |
10 | #include <linux/mempolicy.h> | |
22e057c5 | 11 | #include <linux/rmap.h> |
85863e47 MM |
12 | #include <linux/swap.h> |
13 | #include <linux/swapops.h> | |
e070ad49 | 14 | |
1da177e4 LT |
15 | #include <asm/elf.h> |
16 | #include <asm/uaccess.h> | |
e070ad49 | 17 | #include <asm/tlbflush.h> |
1da177e4 LT |
18 | #include "internal.h" |
19 | ||
df5f8314 | 20 | void task_mem(struct seq_file *m, struct mm_struct *mm) |
1da177e4 | 21 | { |
b084d435 | 22 | unsigned long data, text, lib, swap; |
365e9c87 HD |
23 | 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; | |
1da177e4 LT |
38 | |
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; | |
b084d435 | 42 | swap = get_mm_counter(mm, MM_SWAPENTS); |
df5f8314 | 43 | seq_printf(m, |
365e9c87 | 44 | "VmPeak:\t%8lu kB\n" |
1da177e4 LT |
45 | "VmSize:\t%8lu kB\n" |
46 | "VmLck:\t%8lu kB\n" | |
bc3e53f6 | 47 | "VmPin:\t%8lu kB\n" |
365e9c87 | 48 | "VmHWM:\t%8lu kB\n" |
1da177e4 LT |
49 | "VmRSS:\t%8lu kB\n" |
50 | "VmData:\t%8lu kB\n" | |
51 | "VmStk:\t%8lu kB\n" | |
52 | "VmExe:\t%8lu kB\n" | |
53 | "VmLib:\t%8lu kB\n" | |
b084d435 KH |
54 | "VmPTE:\t%8lu kB\n" |
55 | "VmSwap:\t%8lu kB\n", | |
365e9c87 | 56 | hiwater_vm << (PAGE_SHIFT-10), |
314e51b9 | 57 | total_vm << (PAGE_SHIFT-10), |
1da177e4 | 58 | mm->locked_vm << (PAGE_SHIFT-10), |
bc3e53f6 | 59 | mm->pinned_vm << (PAGE_SHIFT-10), |
365e9c87 HD |
60 | hiwater_rss << (PAGE_SHIFT-10), |
61 | total_rss << (PAGE_SHIFT-10), | |
1da177e4 LT |
62 | data << (PAGE_SHIFT-10), |
63 | mm->stack_vm << (PAGE_SHIFT-10), text, lib, | |
b084d435 KH |
64 | (PTRS_PER_PTE*sizeof(pte_t)*mm->nr_ptes) >> 10, |
65 | swap << (PAGE_SHIFT-10)); | |
1da177e4 LT |
66 | } |
67 | ||
68 | unsigned long task_vsize(struct mm_struct *mm) | |
69 | { | |
70 | return PAGE_SIZE * mm->total_vm; | |
71 | } | |
72 | ||
a2ade7b6 AD |
73 | unsigned long task_statm(struct mm_struct *mm, |
74 | unsigned long *shared, unsigned long *text, | |
75 | unsigned long *data, unsigned long *resident) | |
1da177e4 | 76 | { |
d559db08 | 77 | *shared = get_mm_counter(mm, MM_FILEPAGES); |
1da177e4 LT |
78 | *text = (PAGE_ALIGN(mm->end_code) - (mm->start_code & PAGE_MASK)) |
79 | >> PAGE_SHIFT; | |
80 | *data = mm->total_vm - mm->shared_vm; | |
d559db08 | 81 | *resident = *shared + get_mm_counter(mm, MM_ANONPAGES); |
1da177e4 LT |
82 | return mm->total_vm; |
83 | } | |
84 | ||
1da177e4 LT |
85 | static void pad_len_spaces(struct seq_file *m, int len) |
86 | { | |
87 | len = 25 + sizeof(void*) * 6 - len; | |
88 | if (len < 1) | |
89 | len = 1; | |
90 | seq_printf(m, "%*c", len, ' '); | |
91 | } | |
92 | ||
a6198797 MM |
93 | static void vma_stop(struct proc_maps_private *priv, struct vm_area_struct *vma) |
94 | { | |
95 | if (vma && vma != priv->tail_vma) { | |
96 | struct mm_struct *mm = vma->vm_mm; | |
97 | up_read(&mm->mmap_sem); | |
98 | mmput(mm); | |
99 | } | |
100 | } | |
ec4dd3eb | 101 | |
a6198797 | 102 | static void *m_start(struct seq_file *m, loff_t *pos) |
e070ad49 | 103 | { |
a6198797 MM |
104 | struct proc_maps_private *priv = m->private; |
105 | unsigned long last_addr = m->version; | |
106 | struct mm_struct *mm; | |
107 | struct vm_area_struct *vma, *tail_vma = NULL; | |
108 | loff_t l = *pos; | |
109 | ||
110 | /* Clear the per syscall fields in priv */ | |
111 | priv->task = NULL; | |
112 | priv->tail_vma = NULL; | |
113 | ||
114 | /* | |
115 | * We remember last_addr rather than next_addr to hit with | |
116 | * mmap_cache most of the time. We have zero last_addr at | |
117 | * the beginning and also after lseek. We will have -1 last_addr | |
118 | * after the end of the vmas. | |
119 | */ | |
120 | ||
121 | if (last_addr == -1UL) | |
122 | return NULL; | |
123 | ||
124 | priv->task = get_pid_task(priv->pid, PIDTYPE_PID); | |
125 | if (!priv->task) | |
ec6fd8a4 | 126 | return ERR_PTR(-ESRCH); |
a6198797 | 127 | |
e7dcd999 | 128 | mm = mm_access(priv->task, PTRACE_MODE_READ); |
ec6fd8a4 AV |
129 | if (!mm || IS_ERR(mm)) |
130 | return mm; | |
00f89d21 | 131 | down_read(&mm->mmap_sem); |
a6198797 | 132 | |
31db58b3 | 133 | tail_vma = get_gate_vma(priv->task->mm); |
a6198797 MM |
134 | priv->tail_vma = tail_vma; |
135 | ||
136 | /* Start with last addr hint */ | |
137 | vma = find_vma(mm, last_addr); | |
138 | if (last_addr && vma) { | |
139 | vma = vma->vm_next; | |
140 | goto out; | |
141 | } | |
142 | ||
143 | /* | |
144 | * Check the vma index is within the range and do | |
145 | * sequential scan until m_index. | |
146 | */ | |
147 | vma = NULL; | |
148 | if ((unsigned long)l < mm->map_count) { | |
149 | vma = mm->mmap; | |
150 | while (l-- && vma) | |
151 | vma = vma->vm_next; | |
152 | goto out; | |
153 | } | |
154 | ||
155 | if (l != mm->map_count) | |
156 | tail_vma = NULL; /* After gate vma */ | |
157 | ||
158 | out: | |
159 | if (vma) | |
160 | return vma; | |
161 | ||
162 | /* End of vmas has been reached */ | |
163 | m->version = (tail_vma != NULL)? 0: -1UL; | |
164 | up_read(&mm->mmap_sem); | |
165 | mmput(mm); | |
166 | return tail_vma; | |
167 | } | |
168 | ||
169 | static void *m_next(struct seq_file *m, void *v, loff_t *pos) | |
170 | { | |
171 | struct proc_maps_private *priv = m->private; | |
172 | struct vm_area_struct *vma = v; | |
173 | struct vm_area_struct *tail_vma = priv->tail_vma; | |
174 | ||
175 | (*pos)++; | |
176 | if (vma && (vma != tail_vma) && vma->vm_next) | |
177 | return vma->vm_next; | |
178 | vma_stop(priv, vma); | |
179 | return (vma != tail_vma)? tail_vma: NULL; | |
180 | } | |
181 | ||
182 | static void m_stop(struct seq_file *m, void *v) | |
183 | { | |
184 | struct proc_maps_private *priv = m->private; | |
185 | struct vm_area_struct *vma = v; | |
186 | ||
76597cd3 LT |
187 | if (!IS_ERR(vma)) |
188 | vma_stop(priv, vma); | |
a6198797 MM |
189 | if (priv->task) |
190 | put_task_struct(priv->task); | |
191 | } | |
192 | ||
193 | static int do_maps_open(struct inode *inode, struct file *file, | |
03a44825 | 194 | const struct seq_operations *ops) |
a6198797 MM |
195 | { |
196 | struct proc_maps_private *priv; | |
197 | int ret = -ENOMEM; | |
198 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); | |
199 | if (priv) { | |
200 | priv->pid = proc_pid(inode); | |
201 | ret = seq_open(file, ops); | |
202 | if (!ret) { | |
203 | struct seq_file *m = file->private_data; | |
204 | m->private = priv; | |
205 | } else { | |
206 | kfree(priv); | |
207 | } | |
208 | } | |
209 | return ret; | |
210 | } | |
e070ad49 | 211 | |
b7643757 SP |
212 | static void |
213 | show_map_vma(struct seq_file *m, struct vm_area_struct *vma, int is_pid) | |
1da177e4 | 214 | { |
e070ad49 ML |
215 | struct mm_struct *mm = vma->vm_mm; |
216 | struct file *file = vma->vm_file; | |
b7643757 SP |
217 | struct proc_maps_private *priv = m->private; |
218 | struct task_struct *task = priv->task; | |
ca16d140 | 219 | vm_flags_t flags = vma->vm_flags; |
1da177e4 | 220 | unsigned long ino = 0; |
6260a4b0 | 221 | unsigned long long pgoff = 0; |
a09a79f6 | 222 | unsigned long start, end; |
1da177e4 LT |
223 | dev_t dev = 0; |
224 | int len; | |
b7643757 | 225 | const char *name = NULL; |
1da177e4 LT |
226 | |
227 | if (file) { | |
2fddfeef | 228 | struct inode *inode = vma->vm_file->f_path.dentry->d_inode; |
1da177e4 LT |
229 | dev = inode->i_sb->s_dev; |
230 | ino = inode->i_ino; | |
6260a4b0 | 231 | pgoff = ((loff_t)vma->vm_pgoff) << PAGE_SHIFT; |
1da177e4 LT |
232 | } |
233 | ||
d7824370 LT |
234 | /* We don't show the stack guard page in /proc/maps */ |
235 | start = vma->vm_start; | |
a09a79f6 MP |
236 | if (stack_guard_page_start(vma, start)) |
237 | start += PAGE_SIZE; | |
238 | end = vma->vm_end; | |
239 | if (stack_guard_page_end(vma, end)) | |
240 | end -= PAGE_SIZE; | |
d7824370 | 241 | |
1804dc6e | 242 | seq_printf(m, "%08lx-%08lx %c%c%c%c %08llx %02x:%02x %lu %n", |
d7824370 | 243 | start, |
a09a79f6 | 244 | end, |
1da177e4 LT |
245 | flags & VM_READ ? 'r' : '-', |
246 | flags & VM_WRITE ? 'w' : '-', | |
247 | flags & VM_EXEC ? 'x' : '-', | |
248 | flags & VM_MAYSHARE ? 's' : 'p', | |
6260a4b0 | 249 | pgoff, |
1da177e4 LT |
250 | MAJOR(dev), MINOR(dev), ino, &len); |
251 | ||
252 | /* | |
253 | * Print the dentry name for named mappings, and a | |
254 | * special [heap] marker for the heap: | |
255 | */ | |
e070ad49 | 256 | if (file) { |
1da177e4 | 257 | pad_len_spaces(m, len); |
c32c2f63 | 258 | seq_path(m, &file->f_path, "\n"); |
b7643757 SP |
259 | goto done; |
260 | } | |
261 | ||
262 | name = arch_vma_name(vma); | |
263 | if (!name) { | |
264 | pid_t tid; | |
265 | ||
266 | if (!mm) { | |
267 | name = "[vdso]"; | |
268 | goto done; | |
269 | } | |
270 | ||
271 | if (vma->vm_start <= mm->brk && | |
272 | vma->vm_end >= mm->start_brk) { | |
273 | name = "[heap]"; | |
274 | goto done; | |
275 | } | |
276 | ||
277 | tid = vm_is_stack(task, vma, is_pid); | |
278 | ||
279 | if (tid != 0) { | |
280 | /* | |
281 | * Thread stack in /proc/PID/task/TID/maps or | |
282 | * the main process stack. | |
283 | */ | |
284 | if (!is_pid || (vma->vm_start <= mm->start_stack && | |
285 | vma->vm_end >= mm->start_stack)) { | |
286 | name = "[stack]"; | |
e6e5494c | 287 | } else { |
b7643757 SP |
288 | /* Thread stack in /proc/PID/maps */ |
289 | pad_len_spaces(m, len); | |
290 | seq_printf(m, "[stack:%d]", tid); | |
1da177e4 | 291 | } |
e6e5494c | 292 | } |
b7643757 SP |
293 | } |
294 | ||
295 | done: | |
296 | if (name) { | |
297 | pad_len_spaces(m, len); | |
298 | seq_puts(m, name); | |
1da177e4 LT |
299 | } |
300 | seq_putc(m, '\n'); | |
7c88db0c JK |
301 | } |
302 | ||
b7643757 | 303 | static int show_map(struct seq_file *m, void *v, int is_pid) |
7c88db0c JK |
304 | { |
305 | struct vm_area_struct *vma = v; | |
306 | struct proc_maps_private *priv = m->private; | |
307 | struct task_struct *task = priv->task; | |
308 | ||
b7643757 | 309 | show_map_vma(m, vma, is_pid); |
e070ad49 | 310 | |
e070ad49 | 311 | if (m->count < m->size) /* vma is copied successfully */ |
31db58b3 SW |
312 | m->version = (vma != get_gate_vma(task->mm)) |
313 | ? vma->vm_start : 0; | |
1da177e4 LT |
314 | return 0; |
315 | } | |
316 | ||
b7643757 SP |
317 | static int show_pid_map(struct seq_file *m, void *v) |
318 | { | |
319 | return show_map(m, v, 1); | |
320 | } | |
321 | ||
322 | static int show_tid_map(struct seq_file *m, void *v) | |
323 | { | |
324 | return show_map(m, v, 0); | |
325 | } | |
326 | ||
03a44825 | 327 | static const struct seq_operations proc_pid_maps_op = { |
a6198797 MM |
328 | .start = m_start, |
329 | .next = m_next, | |
330 | .stop = m_stop, | |
b7643757 SP |
331 | .show = show_pid_map |
332 | }; | |
333 | ||
334 | static const struct seq_operations proc_tid_maps_op = { | |
335 | .start = m_start, | |
336 | .next = m_next, | |
337 | .stop = m_stop, | |
338 | .show = show_tid_map | |
a6198797 MM |
339 | }; |
340 | ||
b7643757 | 341 | static int pid_maps_open(struct inode *inode, struct file *file) |
a6198797 MM |
342 | { |
343 | return do_maps_open(inode, file, &proc_pid_maps_op); | |
344 | } | |
345 | ||
b7643757 SP |
346 | static int tid_maps_open(struct inode *inode, struct file *file) |
347 | { | |
348 | return do_maps_open(inode, file, &proc_tid_maps_op); | |
349 | } | |
350 | ||
351 | const struct file_operations proc_pid_maps_operations = { | |
352 | .open = pid_maps_open, | |
353 | .read = seq_read, | |
354 | .llseek = seq_lseek, | |
355 | .release = seq_release_private, | |
356 | }; | |
357 | ||
358 | const struct file_operations proc_tid_maps_operations = { | |
359 | .open = tid_maps_open, | |
a6198797 MM |
360 | .read = seq_read, |
361 | .llseek = seq_lseek, | |
362 | .release = seq_release_private, | |
363 | }; | |
364 | ||
365 | /* | |
366 | * Proportional Set Size(PSS): my share of RSS. | |
367 | * | |
368 | * PSS of a process is the count of pages it has in memory, where each | |
369 | * page is divided by the number of processes sharing it. So if a | |
370 | * process has 1000 pages all to itself, and 1000 shared with one other | |
371 | * process, its PSS will be 1500. | |
372 | * | |
373 | * To keep (accumulated) division errors low, we adopt a 64bit | |
374 | * fixed-point pss counter to minimize division errors. So (pss >> | |
375 | * PSS_SHIFT) would be the real byte count. | |
376 | * | |
377 | * A shift of 12 before division means (assuming 4K page size): | |
378 | * - 1M 3-user-pages add up to 8KB errors; | |
379 | * - supports mapcount up to 2^24, or 16M; | |
380 | * - supports PSS up to 2^52 bytes, or 4PB. | |
381 | */ | |
382 | #define PSS_SHIFT 12 | |
383 | ||
1e883281 | 384 | #ifdef CONFIG_PROC_PAGE_MONITOR |
214e471f | 385 | struct mem_size_stats { |
a6198797 MM |
386 | struct vm_area_struct *vma; |
387 | unsigned long resident; | |
388 | unsigned long shared_clean; | |
389 | unsigned long shared_dirty; | |
390 | unsigned long private_clean; | |
391 | unsigned long private_dirty; | |
392 | unsigned long referenced; | |
b40d4f84 | 393 | unsigned long anonymous; |
4031a219 | 394 | unsigned long anonymous_thp; |
214e471f | 395 | unsigned long swap; |
bca15543 | 396 | unsigned long nonlinear; |
a6198797 MM |
397 | u64 pss; |
398 | }; | |
399 | ||
ae11c4d9 DH |
400 | |
401 | static void smaps_pte_entry(pte_t ptent, unsigned long addr, | |
3c9acc78 | 402 | unsigned long ptent_size, struct mm_walk *walk) |
ae11c4d9 DH |
403 | { |
404 | struct mem_size_stats *mss = walk->private; | |
405 | struct vm_area_struct *vma = mss->vma; | |
bca15543 | 406 | pgoff_t pgoff = linear_page_index(vma, addr); |
b1d4d9e0 | 407 | struct page *page = NULL; |
ae11c4d9 DH |
408 | int mapcount; |
409 | ||
b1d4d9e0 KK |
410 | if (pte_present(ptent)) { |
411 | page = vm_normal_page(vma, addr, ptent); | |
412 | } else if (is_swap_pte(ptent)) { | |
413 | swp_entry_t swpent = pte_to_swp_entry(ptent); | |
ae11c4d9 | 414 | |
b1d4d9e0 KK |
415 | if (!non_swap_entry(swpent)) |
416 | mss->swap += ptent_size; | |
417 | else if (is_migration_entry(swpent)) | |
418 | page = migration_entry_to_page(swpent); | |
bca15543 KK |
419 | } else if (pte_file(ptent)) { |
420 | if (pte_to_pgoff(ptent) != pgoff) | |
421 | mss->nonlinear += ptent_size; | |
b1d4d9e0 | 422 | } |
ae11c4d9 | 423 | |
ae11c4d9 DH |
424 | if (!page) |
425 | return; | |
426 | ||
427 | if (PageAnon(page)) | |
3c9acc78 | 428 | mss->anonymous += ptent_size; |
ae11c4d9 | 429 | |
bca15543 KK |
430 | if (page->index != pgoff) |
431 | mss->nonlinear += ptent_size; | |
432 | ||
3c9acc78 | 433 | mss->resident += ptent_size; |
ae11c4d9 DH |
434 | /* Accumulate the size in pages that have been accessed. */ |
435 | if (pte_young(ptent) || PageReferenced(page)) | |
3c9acc78 | 436 | mss->referenced += ptent_size; |
ae11c4d9 DH |
437 | mapcount = page_mapcount(page); |
438 | if (mapcount >= 2) { | |
439 | if (pte_dirty(ptent) || PageDirty(page)) | |
3c9acc78 | 440 | mss->shared_dirty += ptent_size; |
ae11c4d9 | 441 | else |
3c9acc78 DH |
442 | mss->shared_clean += ptent_size; |
443 | mss->pss += (ptent_size << PSS_SHIFT) / mapcount; | |
ae11c4d9 DH |
444 | } else { |
445 | if (pte_dirty(ptent) || PageDirty(page)) | |
3c9acc78 | 446 | mss->private_dirty += ptent_size; |
ae11c4d9 | 447 | else |
3c9acc78 DH |
448 | mss->private_clean += ptent_size; |
449 | mss->pss += (ptent_size << PSS_SHIFT); | |
ae11c4d9 DH |
450 | } |
451 | } | |
452 | ||
b3ae5acb | 453 | static int smaps_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end, |
2165009b | 454 | struct mm_walk *walk) |
e070ad49 | 455 | { |
2165009b | 456 | struct mem_size_stats *mss = walk->private; |
b3ae5acb | 457 | struct vm_area_struct *vma = mss->vma; |
ae11c4d9 | 458 | pte_t *pte; |
705e87c0 | 459 | spinlock_t *ptl; |
e070ad49 | 460 | |
025c5b24 NH |
461 | if (pmd_trans_huge_lock(pmd, vma) == 1) { |
462 | smaps_pte_entry(*(pte_t *)pmd, addr, HPAGE_PMD_SIZE, walk); | |
22e057c5 | 463 | spin_unlock(&walk->mm->page_table_lock); |
025c5b24 NH |
464 | mss->anonymous_thp += HPAGE_PMD_SIZE; |
465 | return 0; | |
22e057c5 | 466 | } |
1a5a9906 AA |
467 | |
468 | if (pmd_trans_unstable(pmd)) | |
469 | return 0; | |
22e057c5 DH |
470 | /* |
471 | * The mmap_sem held all the way back in m_start() is what | |
472 | * keeps khugepaged out of here and from collapsing things | |
473 | * in here. | |
474 | */ | |
705e87c0 | 475 | pte = pte_offset_map_lock(vma->vm_mm, pmd, addr, &ptl); |
ae11c4d9 | 476 | for (; addr != end; pte++, addr += PAGE_SIZE) |
3c9acc78 | 477 | smaps_pte_entry(*pte, addr, PAGE_SIZE, walk); |
705e87c0 HD |
478 | pte_unmap_unlock(pte - 1, ptl); |
479 | cond_resched(); | |
b3ae5acb | 480 | return 0; |
e070ad49 ML |
481 | } |
482 | ||
b7643757 | 483 | static int show_smap(struct seq_file *m, void *v, int is_pid) |
e070ad49 | 484 | { |
7c88db0c JK |
485 | struct proc_maps_private *priv = m->private; |
486 | struct task_struct *task = priv->task; | |
e070ad49 | 487 | struct vm_area_struct *vma = v; |
e070ad49 | 488 | struct mem_size_stats mss; |
2165009b DH |
489 | struct mm_walk smaps_walk = { |
490 | .pmd_entry = smaps_pte_range, | |
491 | .mm = vma->vm_mm, | |
492 | .private = &mss, | |
493 | }; | |
e070ad49 ML |
494 | |
495 | memset(&mss, 0, sizeof mss); | |
b3ae5acb | 496 | mss.vma = vma; |
d82ef020 | 497 | /* mmap_sem is held in m_start */ |
5ddfae16 | 498 | if (vma->vm_mm && !is_vm_hugetlb_page(vma)) |
2165009b | 499 | walk_page_range(vma->vm_start, vma->vm_end, &smaps_walk); |
4752c369 | 500 | |
b7643757 | 501 | show_map_vma(m, vma, is_pid); |
4752c369 MM |
502 | |
503 | seq_printf(m, | |
504 | "Size: %8lu kB\n" | |
505 | "Rss: %8lu kB\n" | |
506 | "Pss: %8lu kB\n" | |
507 | "Shared_Clean: %8lu kB\n" | |
508 | "Shared_Dirty: %8lu kB\n" | |
509 | "Private_Clean: %8lu kB\n" | |
510 | "Private_Dirty: %8lu kB\n" | |
214e471f | 511 | "Referenced: %8lu kB\n" |
b40d4f84 | 512 | "Anonymous: %8lu kB\n" |
4031a219 | 513 | "AnonHugePages: %8lu kB\n" |
08fba699 | 514 | "Swap: %8lu kB\n" |
3340289d | 515 | "KernelPageSize: %8lu kB\n" |
2d90508f NK |
516 | "MMUPageSize: %8lu kB\n" |
517 | "Locked: %8lu kB\n", | |
4752c369 MM |
518 | (vma->vm_end - vma->vm_start) >> 10, |
519 | mss.resident >> 10, | |
520 | (unsigned long)(mss.pss >> (10 + PSS_SHIFT)), | |
521 | mss.shared_clean >> 10, | |
522 | mss.shared_dirty >> 10, | |
523 | mss.private_clean >> 10, | |
524 | mss.private_dirty >> 10, | |
214e471f | 525 | mss.referenced >> 10, |
b40d4f84 | 526 | mss.anonymous >> 10, |
4031a219 | 527 | mss.anonymous_thp >> 10, |
08fba699 | 528 | mss.swap >> 10, |
3340289d | 529 | vma_kernel_pagesize(vma) >> 10, |
2d90508f NK |
530 | vma_mmu_pagesize(vma) >> 10, |
531 | (vma->vm_flags & VM_LOCKED) ? | |
532 | (unsigned long)(mss.pss >> (10 + PSS_SHIFT)) : 0); | |
4752c369 | 533 | |
bca15543 KK |
534 | if (vma->vm_flags & VM_NONLINEAR) |
535 | seq_printf(m, "Nonlinear: %8lu kB\n", | |
536 | mss.nonlinear >> 10); | |
537 | ||
7c88db0c | 538 | if (m->count < m->size) /* vma is copied successfully */ |
31db58b3 SW |
539 | m->version = (vma != get_gate_vma(task->mm)) |
540 | ? vma->vm_start : 0; | |
7c88db0c | 541 | return 0; |
e070ad49 ML |
542 | } |
543 | ||
b7643757 SP |
544 | static int show_pid_smap(struct seq_file *m, void *v) |
545 | { | |
546 | return show_smap(m, v, 1); | |
547 | } | |
548 | ||
549 | static int show_tid_smap(struct seq_file *m, void *v) | |
550 | { | |
551 | return show_smap(m, v, 0); | |
552 | } | |
553 | ||
03a44825 | 554 | static const struct seq_operations proc_pid_smaps_op = { |
a6198797 MM |
555 | .start = m_start, |
556 | .next = m_next, | |
557 | .stop = m_stop, | |
b7643757 SP |
558 | .show = show_pid_smap |
559 | }; | |
560 | ||
561 | static const struct seq_operations proc_tid_smaps_op = { | |
562 | .start = m_start, | |
563 | .next = m_next, | |
564 | .stop = m_stop, | |
565 | .show = show_tid_smap | |
a6198797 MM |
566 | }; |
567 | ||
b7643757 | 568 | static int pid_smaps_open(struct inode *inode, struct file *file) |
a6198797 MM |
569 | { |
570 | return do_maps_open(inode, file, &proc_pid_smaps_op); | |
571 | } | |
572 | ||
b7643757 SP |
573 | static int tid_smaps_open(struct inode *inode, struct file *file) |
574 | { | |
575 | return do_maps_open(inode, file, &proc_tid_smaps_op); | |
576 | } | |
577 | ||
578 | const struct file_operations proc_pid_smaps_operations = { | |
579 | .open = pid_smaps_open, | |
580 | .read = seq_read, | |
581 | .llseek = seq_lseek, | |
582 | .release = seq_release_private, | |
583 | }; | |
584 | ||
585 | const struct file_operations proc_tid_smaps_operations = { | |
586 | .open = tid_smaps_open, | |
a6198797 MM |
587 | .read = seq_read, |
588 | .llseek = seq_lseek, | |
589 | .release = seq_release_private, | |
590 | }; | |
591 | ||
592 | static int clear_refs_pte_range(pmd_t *pmd, unsigned long addr, | |
2165009b | 593 | unsigned long end, struct mm_walk *walk) |
a6198797 | 594 | { |
2165009b | 595 | struct vm_area_struct *vma = walk->private; |
a6198797 MM |
596 | pte_t *pte, ptent; |
597 | spinlock_t *ptl; | |
598 | struct page *page; | |
599 | ||
03319327 | 600 | split_huge_page_pmd(walk->mm, pmd); |
1a5a9906 AA |
601 | if (pmd_trans_unstable(pmd)) |
602 | return 0; | |
03319327 | 603 | |
a6198797 MM |
604 | pte = pte_offset_map_lock(vma->vm_mm, pmd, addr, &ptl); |
605 | for (; addr != end; pte++, addr += PAGE_SIZE) { | |
606 | ptent = *pte; | |
607 | if (!pte_present(ptent)) | |
608 | continue; | |
609 | ||
610 | page = vm_normal_page(vma, addr, ptent); | |
611 | if (!page) | |
612 | continue; | |
613 | ||
614 | /* Clear accessed and referenced bits. */ | |
615 | ptep_test_and_clear_young(vma, addr, pte); | |
616 | ClearPageReferenced(page); | |
617 | } | |
618 | pte_unmap_unlock(pte - 1, ptl); | |
619 | cond_resched(); | |
620 | return 0; | |
621 | } | |
622 | ||
398499d5 MB |
623 | #define CLEAR_REFS_ALL 1 |
624 | #define CLEAR_REFS_ANON 2 | |
625 | #define CLEAR_REFS_MAPPED 3 | |
626 | ||
f248dcb3 MM |
627 | static ssize_t clear_refs_write(struct file *file, const char __user *buf, |
628 | size_t count, loff_t *ppos) | |
b813e931 | 629 | { |
f248dcb3 | 630 | struct task_struct *task; |
fb92a4b0 | 631 | char buffer[PROC_NUMBUF]; |
f248dcb3 | 632 | struct mm_struct *mm; |
b813e931 | 633 | struct vm_area_struct *vma; |
0a8cb8e3 AD |
634 | int type; |
635 | int rv; | |
b813e931 | 636 | |
f248dcb3 MM |
637 | memset(buffer, 0, sizeof(buffer)); |
638 | if (count > sizeof(buffer) - 1) | |
639 | count = sizeof(buffer) - 1; | |
640 | if (copy_from_user(buffer, buf, count)) | |
641 | return -EFAULT; | |
0a8cb8e3 AD |
642 | rv = kstrtoint(strstrip(buffer), 10, &type); |
643 | if (rv < 0) | |
644 | return rv; | |
398499d5 | 645 | if (type < CLEAR_REFS_ALL || type > CLEAR_REFS_MAPPED) |
f248dcb3 | 646 | return -EINVAL; |
f248dcb3 MM |
647 | task = get_proc_task(file->f_path.dentry->d_inode); |
648 | if (!task) | |
649 | return -ESRCH; | |
650 | mm = get_task_mm(task); | |
651 | if (mm) { | |
20cbc972 AM |
652 | struct mm_walk clear_refs_walk = { |
653 | .pmd_entry = clear_refs_pte_range, | |
654 | .mm = mm, | |
655 | }; | |
f248dcb3 | 656 | down_read(&mm->mmap_sem); |
2165009b DH |
657 | for (vma = mm->mmap; vma; vma = vma->vm_next) { |
658 | clear_refs_walk.private = vma; | |
398499d5 MB |
659 | if (is_vm_hugetlb_page(vma)) |
660 | continue; | |
661 | /* | |
662 | * Writing 1 to /proc/pid/clear_refs affects all pages. | |
663 | * | |
664 | * Writing 2 to /proc/pid/clear_refs only affects | |
665 | * Anonymous pages. | |
666 | * | |
667 | * Writing 3 to /proc/pid/clear_refs only affects file | |
668 | * mapped pages. | |
669 | */ | |
670 | if (type == CLEAR_REFS_ANON && vma->vm_file) | |
671 | continue; | |
672 | if (type == CLEAR_REFS_MAPPED && !vma->vm_file) | |
673 | continue; | |
674 | walk_page_range(vma->vm_start, vma->vm_end, | |
675 | &clear_refs_walk); | |
2165009b | 676 | } |
f248dcb3 MM |
677 | flush_tlb_mm(mm); |
678 | up_read(&mm->mmap_sem); | |
679 | mmput(mm); | |
680 | } | |
681 | put_task_struct(task); | |
fb92a4b0 VL |
682 | |
683 | return count; | |
b813e931 DR |
684 | } |
685 | ||
f248dcb3 MM |
686 | const struct file_operations proc_clear_refs_operations = { |
687 | .write = clear_refs_write, | |
6038f373 | 688 | .llseek = noop_llseek, |
f248dcb3 MM |
689 | }; |
690 | ||
092b50ba NH |
691 | typedef struct { |
692 | u64 pme; | |
693 | } pagemap_entry_t; | |
694 | ||
85863e47 | 695 | struct pagemapread { |
d82ef020 | 696 | int pos, len; |
092b50ba | 697 | pagemap_entry_t *buffer; |
85863e47 MM |
698 | }; |
699 | ||
5aaabe83 NH |
700 | #define PAGEMAP_WALK_SIZE (PMD_SIZE) |
701 | #define PAGEMAP_WALK_MASK (PMD_MASK) | |
702 | ||
f16278c6 HR |
703 | #define PM_ENTRY_BYTES sizeof(u64) |
704 | #define PM_STATUS_BITS 3 | |
705 | #define PM_STATUS_OFFSET (64 - PM_STATUS_BITS) | |
706 | #define PM_STATUS_MASK (((1LL << PM_STATUS_BITS) - 1) << PM_STATUS_OFFSET) | |
707 | #define PM_STATUS(nr) (((nr) << PM_STATUS_OFFSET) & PM_STATUS_MASK) | |
708 | #define PM_PSHIFT_BITS 6 | |
709 | #define PM_PSHIFT_OFFSET (PM_STATUS_OFFSET - PM_PSHIFT_BITS) | |
710 | #define PM_PSHIFT_MASK (((1LL << PM_PSHIFT_BITS) - 1) << PM_PSHIFT_OFFSET) | |
711 | #define PM_PSHIFT(x) (((u64) (x) << PM_PSHIFT_OFFSET) & PM_PSHIFT_MASK) | |
712 | #define PM_PFRAME_MASK ((1LL << PM_PSHIFT_OFFSET) - 1) | |
713 | #define PM_PFRAME(x) ((x) & PM_PFRAME_MASK) | |
714 | ||
715 | #define PM_PRESENT PM_STATUS(4LL) | |
716 | #define PM_SWAP PM_STATUS(2LL) | |
052fb0d6 | 717 | #define PM_FILE PM_STATUS(1LL) |
f16278c6 | 718 | #define PM_NOT_PRESENT PM_PSHIFT(PAGE_SHIFT) |
85863e47 MM |
719 | #define PM_END_OF_BUFFER 1 |
720 | ||
092b50ba NH |
721 | static inline pagemap_entry_t make_pme(u64 val) |
722 | { | |
723 | return (pagemap_entry_t) { .pme = val }; | |
724 | } | |
725 | ||
726 | static int add_to_pagemap(unsigned long addr, pagemap_entry_t *pme, | |
85863e47 MM |
727 | struct pagemapread *pm) |
728 | { | |
092b50ba | 729 | pm->buffer[pm->pos++] = *pme; |
d82ef020 | 730 | if (pm->pos >= pm->len) |
aae8679b | 731 | return PM_END_OF_BUFFER; |
85863e47 MM |
732 | return 0; |
733 | } | |
734 | ||
735 | static int pagemap_pte_hole(unsigned long start, unsigned long end, | |
2165009b | 736 | struct mm_walk *walk) |
85863e47 | 737 | { |
2165009b | 738 | struct pagemapread *pm = walk->private; |
85863e47 MM |
739 | unsigned long addr; |
740 | int err = 0; | |
092b50ba NH |
741 | pagemap_entry_t pme = make_pme(PM_NOT_PRESENT); |
742 | ||
85863e47 | 743 | for (addr = start; addr < end; addr += PAGE_SIZE) { |
092b50ba | 744 | err = add_to_pagemap(addr, &pme, pm); |
85863e47 MM |
745 | if (err) |
746 | break; | |
747 | } | |
748 | return err; | |
749 | } | |
750 | ||
052fb0d6 KK |
751 | static void pte_to_pagemap_entry(pagemap_entry_t *pme, |
752 | struct vm_area_struct *vma, unsigned long addr, pte_t pte) | |
85863e47 | 753 | { |
052fb0d6 KK |
754 | u64 frame, flags; |
755 | struct page *page = NULL; | |
85863e47 | 756 | |
052fb0d6 KK |
757 | if (pte_present(pte)) { |
758 | frame = pte_pfn(pte); | |
759 | flags = PM_PRESENT; | |
760 | page = vm_normal_page(vma, addr, pte); | |
761 | } else if (is_swap_pte(pte)) { | |
762 | swp_entry_t entry = pte_to_swp_entry(pte); | |
763 | ||
764 | frame = swp_type(entry) | | |
765 | (swp_offset(entry) << MAX_SWAPFILES_SHIFT); | |
766 | flags = PM_SWAP; | |
767 | if (is_migration_entry(entry)) | |
768 | page = migration_entry_to_page(entry); | |
769 | } else { | |
16fbdce6 | 770 | *pme = make_pme(PM_NOT_PRESENT); |
052fb0d6 KK |
771 | return; |
772 | } | |
773 | ||
774 | if (page && !PageAnon(page)) | |
775 | flags |= PM_FILE; | |
776 | ||
777 | *pme = make_pme(PM_PFRAME(frame) | PM_PSHIFT(PAGE_SHIFT) | flags); | |
bcf8039e DH |
778 | } |
779 | ||
5aaabe83 | 780 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
092b50ba NH |
781 | static void thp_pmd_to_pagemap_entry(pagemap_entry_t *pme, |
782 | pmd_t pmd, int offset) | |
5aaabe83 | 783 | { |
5aaabe83 NH |
784 | /* |
785 | * Currently pmd for thp is always present because thp can not be | |
786 | * swapped-out, migrated, or HWPOISONed (split in such cases instead.) | |
787 | * This if-check is just to prepare for future implementation. | |
788 | */ | |
789 | if (pmd_present(pmd)) | |
092b50ba NH |
790 | *pme = make_pme(PM_PFRAME(pmd_pfn(pmd) + offset) |
791 | | PM_PSHIFT(PAGE_SHIFT) | PM_PRESENT); | |
16fbdce6 KK |
792 | else |
793 | *pme = make_pme(PM_NOT_PRESENT); | |
5aaabe83 NH |
794 | } |
795 | #else | |
092b50ba NH |
796 | static inline void thp_pmd_to_pagemap_entry(pagemap_entry_t *pme, |
797 | pmd_t pmd, int offset) | |
5aaabe83 | 798 | { |
5aaabe83 NH |
799 | } |
800 | #endif | |
801 | ||
85863e47 | 802 | static int pagemap_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end, |
2165009b | 803 | struct mm_walk *walk) |
85863e47 | 804 | { |
bcf8039e | 805 | struct vm_area_struct *vma; |
2165009b | 806 | struct pagemapread *pm = walk->private; |
85863e47 MM |
807 | pte_t *pte; |
808 | int err = 0; | |
092b50ba | 809 | pagemap_entry_t pme = make_pme(PM_NOT_PRESENT); |
85863e47 | 810 | |
bcf8039e DH |
811 | /* find the first VMA at or above 'addr' */ |
812 | vma = find_vma(walk->mm, addr); | |
08fa29d9 | 813 | if (vma && pmd_trans_huge_lock(pmd, vma) == 1) { |
025c5b24 NH |
814 | for (; addr != end; addr += PAGE_SIZE) { |
815 | unsigned long offset; | |
816 | ||
817 | offset = (addr & ~PAGEMAP_WALK_MASK) >> | |
818 | PAGE_SHIFT; | |
092b50ba NH |
819 | thp_pmd_to_pagemap_entry(&pme, *pmd, offset); |
820 | err = add_to_pagemap(addr, &pme, pm); | |
025c5b24 NH |
821 | if (err) |
822 | break; | |
5aaabe83 | 823 | } |
5aaabe83 | 824 | spin_unlock(&walk->mm->page_table_lock); |
025c5b24 | 825 | return err; |
5aaabe83 NH |
826 | } |
827 | ||
45f83cef AA |
828 | if (pmd_trans_unstable(pmd)) |
829 | return 0; | |
85863e47 | 830 | for (; addr != end; addr += PAGE_SIZE) { |
bcf8039e DH |
831 | |
832 | /* check to see if we've left 'vma' behind | |
833 | * and need a new, higher one */ | |
16fbdce6 | 834 | if (vma && (addr >= vma->vm_end)) { |
bcf8039e | 835 | vma = find_vma(walk->mm, addr); |
16fbdce6 KK |
836 | pme = make_pme(PM_NOT_PRESENT); |
837 | } | |
bcf8039e DH |
838 | |
839 | /* check that 'vma' actually covers this address, | |
840 | * and that it isn't a huge page vma */ | |
841 | if (vma && (vma->vm_start <= addr) && | |
842 | !is_vm_hugetlb_page(vma)) { | |
843 | pte = pte_offset_map(pmd, addr); | |
052fb0d6 | 844 | pte_to_pagemap_entry(&pme, vma, addr, *pte); |
bcf8039e DH |
845 | /* unmap before userspace copy */ |
846 | pte_unmap(pte); | |
847 | } | |
092b50ba | 848 | err = add_to_pagemap(addr, &pme, pm); |
85863e47 MM |
849 | if (err) |
850 | return err; | |
851 | } | |
852 | ||
853 | cond_resched(); | |
854 | ||
855 | return err; | |
856 | } | |
857 | ||
1a5cb814 | 858 | #ifdef CONFIG_HUGETLB_PAGE |
092b50ba NH |
859 | static void huge_pte_to_pagemap_entry(pagemap_entry_t *pme, |
860 | pte_t pte, int offset) | |
5dc37642 | 861 | { |
5dc37642 | 862 | if (pte_present(pte)) |
092b50ba NH |
863 | *pme = make_pme(PM_PFRAME(pte_pfn(pte) + offset) |
864 | | PM_PSHIFT(PAGE_SHIFT) | PM_PRESENT); | |
16fbdce6 KK |
865 | else |
866 | *pme = make_pme(PM_NOT_PRESENT); | |
5dc37642 NH |
867 | } |
868 | ||
116354d1 NH |
869 | /* This function walks within one hugetlb entry in the single call */ |
870 | static int pagemap_hugetlb_range(pte_t *pte, unsigned long hmask, | |
871 | unsigned long addr, unsigned long end, | |
872 | struct mm_walk *walk) | |
5dc37642 | 873 | { |
5dc37642 | 874 | struct pagemapread *pm = walk->private; |
5dc37642 | 875 | int err = 0; |
16fbdce6 | 876 | pagemap_entry_t pme; |
5dc37642 | 877 | |
5dc37642 | 878 | for (; addr != end; addr += PAGE_SIZE) { |
116354d1 | 879 | int offset = (addr & ~hmask) >> PAGE_SHIFT; |
092b50ba NH |
880 | huge_pte_to_pagemap_entry(&pme, *pte, offset); |
881 | err = add_to_pagemap(addr, &pme, pm); | |
5dc37642 NH |
882 | if (err) |
883 | return err; | |
884 | } | |
885 | ||
886 | cond_resched(); | |
887 | ||
888 | return err; | |
889 | } | |
1a5cb814 | 890 | #endif /* HUGETLB_PAGE */ |
5dc37642 | 891 | |
85863e47 MM |
892 | /* |
893 | * /proc/pid/pagemap - an array mapping virtual pages to pfns | |
894 | * | |
f16278c6 HR |
895 | * For each page in the address space, this file contains one 64-bit entry |
896 | * consisting of the following: | |
897 | * | |
052fb0d6 | 898 | * Bits 0-54 page frame number (PFN) if present |
f16278c6 | 899 | * Bits 0-4 swap type if swapped |
052fb0d6 | 900 | * Bits 5-54 swap offset if swapped |
f16278c6 | 901 | * Bits 55-60 page shift (page size = 1<<page shift) |
052fb0d6 | 902 | * Bit 61 page is file-page or shared-anon |
f16278c6 HR |
903 | * Bit 62 page swapped |
904 | * Bit 63 page present | |
905 | * | |
906 | * If the page is not present but in swap, then the PFN contains an | |
907 | * encoding of the swap file number and the page's offset into the | |
908 | * swap. Unmapped pages return a null PFN. This allows determining | |
85863e47 MM |
909 | * precisely which pages are mapped (or in swap) and comparing mapped |
910 | * pages between processes. | |
911 | * | |
912 | * Efficient users of this interface will use /proc/pid/maps to | |
913 | * determine which areas of memory are actually mapped and llseek to | |
914 | * skip over unmapped regions. | |
915 | */ | |
916 | static ssize_t pagemap_read(struct file *file, char __user *buf, | |
917 | size_t count, loff_t *ppos) | |
918 | { | |
919 | struct task_struct *task = get_proc_task(file->f_path.dentry->d_inode); | |
85863e47 MM |
920 | struct mm_struct *mm; |
921 | struct pagemapread pm; | |
85863e47 | 922 | int ret = -ESRCH; |
ee1e6ab6 | 923 | struct mm_walk pagemap_walk = {}; |
5d7e0d2b AM |
924 | unsigned long src; |
925 | unsigned long svpfn; | |
926 | unsigned long start_vaddr; | |
927 | unsigned long end_vaddr; | |
d82ef020 | 928 | int copied = 0; |
85863e47 MM |
929 | |
930 | if (!task) | |
931 | goto out; | |
932 | ||
85863e47 MM |
933 | ret = -EINVAL; |
934 | /* file position must be aligned */ | |
aae8679b | 935 | if ((*ppos % PM_ENTRY_BYTES) || (count % PM_ENTRY_BYTES)) |
fb39380b | 936 | goto out_task; |
85863e47 MM |
937 | |
938 | ret = 0; | |
08161786 VM |
939 | if (!count) |
940 | goto out_task; | |
941 | ||
d82ef020 KH |
942 | pm.len = PM_ENTRY_BYTES * (PAGEMAP_WALK_SIZE >> PAGE_SHIFT); |
943 | pm.buffer = kmalloc(pm.len, GFP_TEMPORARY); | |
5d7e0d2b | 944 | ret = -ENOMEM; |
d82ef020 | 945 | if (!pm.buffer) |
98bc93e5 KM |
946 | goto out_task; |
947 | ||
e7dcd999 | 948 | mm = mm_access(task, PTRACE_MODE_READ); |
98bc93e5 KM |
949 | ret = PTR_ERR(mm); |
950 | if (!mm || IS_ERR(mm)) | |
951 | goto out_free; | |
85863e47 | 952 | |
5d7e0d2b AM |
953 | pagemap_walk.pmd_entry = pagemap_pte_range; |
954 | pagemap_walk.pte_hole = pagemap_pte_hole; | |
1a5cb814 | 955 | #ifdef CONFIG_HUGETLB_PAGE |
5dc37642 | 956 | pagemap_walk.hugetlb_entry = pagemap_hugetlb_range; |
1a5cb814 | 957 | #endif |
5d7e0d2b AM |
958 | pagemap_walk.mm = mm; |
959 | pagemap_walk.private = ± | |
960 | ||
961 | src = *ppos; | |
962 | svpfn = src / PM_ENTRY_BYTES; | |
963 | start_vaddr = svpfn << PAGE_SHIFT; | |
964 | end_vaddr = TASK_SIZE_OF(task); | |
965 | ||
966 | /* watch out for wraparound */ | |
967 | if (svpfn > TASK_SIZE_OF(task) >> PAGE_SHIFT) | |
968 | start_vaddr = end_vaddr; | |
969 | ||
970 | /* | |
971 | * The odds are that this will stop walking way | |
972 | * before end_vaddr, because the length of the | |
973 | * user buffer is tracked in "pm", and the walk | |
974 | * will stop when we hit the end of the buffer. | |
975 | */ | |
d82ef020 KH |
976 | ret = 0; |
977 | while (count && (start_vaddr < end_vaddr)) { | |
978 | int len; | |
979 | unsigned long end; | |
980 | ||
981 | pm.pos = 0; | |
ea251c1d | 982 | end = (start_vaddr + PAGEMAP_WALK_SIZE) & PAGEMAP_WALK_MASK; |
d82ef020 KH |
983 | /* overflow ? */ |
984 | if (end < start_vaddr || end > end_vaddr) | |
985 | end = end_vaddr; | |
986 | down_read(&mm->mmap_sem); | |
987 | ret = walk_page_range(start_vaddr, end, &pagemap_walk); | |
988 | up_read(&mm->mmap_sem); | |
989 | start_vaddr = end; | |
990 | ||
991 | len = min(count, PM_ENTRY_BYTES * pm.pos); | |
309361e0 | 992 | if (copy_to_user(buf, pm.buffer, len)) { |
d82ef020 | 993 | ret = -EFAULT; |
98bc93e5 | 994 | goto out_mm; |
d82ef020 KH |
995 | } |
996 | copied += len; | |
997 | buf += len; | |
998 | count -= len; | |
85863e47 | 999 | } |
d82ef020 KH |
1000 | *ppos += copied; |
1001 | if (!ret || ret == PM_END_OF_BUFFER) | |
1002 | ret = copied; | |
1003 | ||
fb39380b MT |
1004 | out_mm: |
1005 | mmput(mm); | |
98bc93e5 KM |
1006 | out_free: |
1007 | kfree(pm.buffer); | |
85863e47 MM |
1008 | out_task: |
1009 | put_task_struct(task); | |
1010 | out: | |
1011 | return ret; | |
1012 | } | |
1013 | ||
1014 | const struct file_operations proc_pagemap_operations = { | |
1015 | .llseek = mem_lseek, /* borrow this */ | |
1016 | .read = pagemap_read, | |
1017 | }; | |
1e883281 | 1018 | #endif /* CONFIG_PROC_PAGE_MONITOR */ |
85863e47 | 1019 | |
6e21c8f1 | 1020 | #ifdef CONFIG_NUMA |
6e21c8f1 | 1021 | |
f69ff943 SW |
1022 | struct numa_maps { |
1023 | struct vm_area_struct *vma; | |
1024 | unsigned long pages; | |
1025 | unsigned long anon; | |
1026 | unsigned long active; | |
1027 | unsigned long writeback; | |
1028 | unsigned long mapcount_max; | |
1029 | unsigned long dirty; | |
1030 | unsigned long swapcache; | |
1031 | unsigned long node[MAX_NUMNODES]; | |
1032 | }; | |
1033 | ||
5b52fc89 SW |
1034 | struct numa_maps_private { |
1035 | struct proc_maps_private proc_maps; | |
1036 | struct numa_maps md; | |
1037 | }; | |
1038 | ||
eb4866d0 DH |
1039 | static void gather_stats(struct page *page, struct numa_maps *md, int pte_dirty, |
1040 | unsigned long nr_pages) | |
f69ff943 SW |
1041 | { |
1042 | int count = page_mapcount(page); | |
1043 | ||
eb4866d0 | 1044 | md->pages += nr_pages; |
f69ff943 | 1045 | if (pte_dirty || PageDirty(page)) |
eb4866d0 | 1046 | md->dirty += nr_pages; |
f69ff943 SW |
1047 | |
1048 | if (PageSwapCache(page)) | |
eb4866d0 | 1049 | md->swapcache += nr_pages; |
f69ff943 SW |
1050 | |
1051 | if (PageActive(page) || PageUnevictable(page)) | |
eb4866d0 | 1052 | md->active += nr_pages; |
f69ff943 SW |
1053 | |
1054 | if (PageWriteback(page)) | |
eb4866d0 | 1055 | md->writeback += nr_pages; |
f69ff943 SW |
1056 | |
1057 | if (PageAnon(page)) | |
eb4866d0 | 1058 | md->anon += nr_pages; |
f69ff943 SW |
1059 | |
1060 | if (count > md->mapcount_max) | |
1061 | md->mapcount_max = count; | |
1062 | ||
eb4866d0 | 1063 | md->node[page_to_nid(page)] += nr_pages; |
f69ff943 SW |
1064 | } |
1065 | ||
3200a8aa DH |
1066 | static struct page *can_gather_numa_stats(pte_t pte, struct vm_area_struct *vma, |
1067 | unsigned long addr) | |
1068 | { | |
1069 | struct page *page; | |
1070 | int nid; | |
1071 | ||
1072 | if (!pte_present(pte)) | |
1073 | return NULL; | |
1074 | ||
1075 | page = vm_normal_page(vma, addr, pte); | |
1076 | if (!page) | |
1077 | return NULL; | |
1078 | ||
1079 | if (PageReserved(page)) | |
1080 | return NULL; | |
1081 | ||
1082 | nid = page_to_nid(page); | |
1083 | if (!node_isset(nid, node_states[N_HIGH_MEMORY])) | |
1084 | return NULL; | |
1085 | ||
1086 | return page; | |
1087 | } | |
1088 | ||
f69ff943 SW |
1089 | static int gather_pte_stats(pmd_t *pmd, unsigned long addr, |
1090 | unsigned long end, struct mm_walk *walk) | |
1091 | { | |
1092 | struct numa_maps *md; | |
1093 | spinlock_t *ptl; | |
1094 | pte_t *orig_pte; | |
1095 | pte_t *pte; | |
1096 | ||
1097 | md = walk->private; | |
025c5b24 NH |
1098 | |
1099 | if (pmd_trans_huge_lock(pmd, md->vma) == 1) { | |
1100 | pte_t huge_pte = *(pte_t *)pmd; | |
1101 | struct page *page; | |
1102 | ||
1103 | page = can_gather_numa_stats(huge_pte, md->vma, addr); | |
1104 | if (page) | |
1105 | gather_stats(page, md, pte_dirty(huge_pte), | |
1106 | HPAGE_PMD_SIZE/PAGE_SIZE); | |
32ef4384 | 1107 | spin_unlock(&walk->mm->page_table_lock); |
025c5b24 | 1108 | return 0; |
32ef4384 DH |
1109 | } |
1110 | ||
1a5a9906 AA |
1111 | if (pmd_trans_unstable(pmd)) |
1112 | return 0; | |
f69ff943 SW |
1113 | orig_pte = pte = pte_offset_map_lock(walk->mm, pmd, addr, &ptl); |
1114 | do { | |
3200a8aa | 1115 | struct page *page = can_gather_numa_stats(*pte, md->vma, addr); |
f69ff943 SW |
1116 | if (!page) |
1117 | continue; | |
eb4866d0 | 1118 | gather_stats(page, md, pte_dirty(*pte), 1); |
f69ff943 SW |
1119 | |
1120 | } while (pte++, addr += PAGE_SIZE, addr != end); | |
1121 | pte_unmap_unlock(orig_pte, ptl); | |
1122 | return 0; | |
1123 | } | |
1124 | #ifdef CONFIG_HUGETLB_PAGE | |
1125 | static int gather_hugetbl_stats(pte_t *pte, unsigned long hmask, | |
1126 | unsigned long addr, unsigned long end, struct mm_walk *walk) | |
1127 | { | |
1128 | struct numa_maps *md; | |
1129 | struct page *page; | |
1130 | ||
1131 | if (pte_none(*pte)) | |
1132 | return 0; | |
1133 | ||
1134 | page = pte_page(*pte); | |
1135 | if (!page) | |
1136 | return 0; | |
1137 | ||
1138 | md = walk->private; | |
eb4866d0 | 1139 | gather_stats(page, md, pte_dirty(*pte), 1); |
f69ff943 SW |
1140 | return 0; |
1141 | } | |
1142 | ||
1143 | #else | |
1144 | static int gather_hugetbl_stats(pte_t *pte, unsigned long hmask, | |
1145 | unsigned long addr, unsigned long end, struct mm_walk *walk) | |
1146 | { | |
1147 | return 0; | |
1148 | } | |
1149 | #endif | |
1150 | ||
1151 | /* | |
1152 | * Display pages allocated per node and memory policy via /proc. | |
1153 | */ | |
b7643757 | 1154 | static int show_numa_map(struct seq_file *m, void *v, int is_pid) |
f69ff943 | 1155 | { |
5b52fc89 SW |
1156 | struct numa_maps_private *numa_priv = m->private; |
1157 | struct proc_maps_private *proc_priv = &numa_priv->proc_maps; | |
f69ff943 | 1158 | struct vm_area_struct *vma = v; |
5b52fc89 | 1159 | struct numa_maps *md = &numa_priv->md; |
f69ff943 SW |
1160 | struct file *file = vma->vm_file; |
1161 | struct mm_struct *mm = vma->vm_mm; | |
1162 | struct mm_walk walk = {}; | |
1163 | struct mempolicy *pol; | |
1164 | int n; | |
1165 | char buffer[50]; | |
1166 | ||
1167 | if (!mm) | |
1168 | return 0; | |
1169 | ||
5b52fc89 SW |
1170 | /* Ensure we start with an empty set of numa_maps statistics. */ |
1171 | memset(md, 0, sizeof(*md)); | |
f69ff943 SW |
1172 | |
1173 | md->vma = vma; | |
1174 | ||
1175 | walk.hugetlb_entry = gather_hugetbl_stats; | |
1176 | walk.pmd_entry = gather_pte_stats; | |
1177 | walk.private = md; | |
1178 | walk.mm = mm; | |
1179 | ||
5b52fc89 | 1180 | pol = get_vma_policy(proc_priv->task, vma, vma->vm_start); |
f69ff943 SW |
1181 | mpol_to_str(buffer, sizeof(buffer), pol, 0); |
1182 | mpol_cond_put(pol); | |
1183 | ||
1184 | seq_printf(m, "%08lx %s", vma->vm_start, buffer); | |
1185 | ||
1186 | if (file) { | |
1187 | seq_printf(m, " file="); | |
1188 | seq_path(m, &file->f_path, "\n\t= "); | |
1189 | } else if (vma->vm_start <= mm->brk && vma->vm_end >= mm->start_brk) { | |
1190 | seq_printf(m, " heap"); | |
b7643757 SP |
1191 | } else { |
1192 | pid_t tid = vm_is_stack(proc_priv->task, vma, is_pid); | |
1193 | if (tid != 0) { | |
1194 | /* | |
1195 | * Thread stack in /proc/PID/task/TID/maps or | |
1196 | * the main process stack. | |
1197 | */ | |
1198 | if (!is_pid || (vma->vm_start <= mm->start_stack && | |
1199 | vma->vm_end >= mm->start_stack)) | |
1200 | seq_printf(m, " stack"); | |
1201 | else | |
1202 | seq_printf(m, " stack:%d", tid); | |
1203 | } | |
f69ff943 SW |
1204 | } |
1205 | ||
fc360bd9 AM |
1206 | if (is_vm_hugetlb_page(vma)) |
1207 | seq_printf(m, " huge"); | |
1208 | ||
f69ff943 SW |
1209 | walk_page_range(vma->vm_start, vma->vm_end, &walk); |
1210 | ||
1211 | if (!md->pages) | |
1212 | goto out; | |
1213 | ||
1214 | if (md->anon) | |
1215 | seq_printf(m, " anon=%lu", md->anon); | |
1216 | ||
1217 | if (md->dirty) | |
1218 | seq_printf(m, " dirty=%lu", md->dirty); | |
1219 | ||
1220 | if (md->pages != md->anon && md->pages != md->dirty) | |
1221 | seq_printf(m, " mapped=%lu", md->pages); | |
1222 | ||
1223 | if (md->mapcount_max > 1) | |
1224 | seq_printf(m, " mapmax=%lu", md->mapcount_max); | |
1225 | ||
1226 | if (md->swapcache) | |
1227 | seq_printf(m, " swapcache=%lu", md->swapcache); | |
1228 | ||
1229 | if (md->active < md->pages && !is_vm_hugetlb_page(vma)) | |
1230 | seq_printf(m, " active=%lu", md->active); | |
1231 | ||
1232 | if (md->writeback) | |
1233 | seq_printf(m, " writeback=%lu", md->writeback); | |
1234 | ||
1235 | for_each_node_state(n, N_HIGH_MEMORY) | |
1236 | if (md->node[n]) | |
1237 | seq_printf(m, " N%d=%lu", n, md->node[n]); | |
1238 | out: | |
1239 | seq_putc(m, '\n'); | |
f69ff943 SW |
1240 | |
1241 | if (m->count < m->size) | |
5b52fc89 | 1242 | m->version = (vma != proc_priv->tail_vma) ? vma->vm_start : 0; |
f69ff943 SW |
1243 | return 0; |
1244 | } | |
5b52fc89 | 1245 | |
b7643757 SP |
1246 | static int show_pid_numa_map(struct seq_file *m, void *v) |
1247 | { | |
1248 | return show_numa_map(m, v, 1); | |
1249 | } | |
1250 | ||
1251 | static int show_tid_numa_map(struct seq_file *m, void *v) | |
1252 | { | |
1253 | return show_numa_map(m, v, 0); | |
1254 | } | |
1255 | ||
03a44825 | 1256 | static const struct seq_operations proc_pid_numa_maps_op = { |
b7643757 SP |
1257 | .start = m_start, |
1258 | .next = m_next, | |
1259 | .stop = m_stop, | |
1260 | .show = show_pid_numa_map, | |
6e21c8f1 | 1261 | }; |
662795de | 1262 | |
b7643757 SP |
1263 | static const struct seq_operations proc_tid_numa_maps_op = { |
1264 | .start = m_start, | |
1265 | .next = m_next, | |
1266 | .stop = m_stop, | |
1267 | .show = show_tid_numa_map, | |
1268 | }; | |
1269 | ||
1270 | static int numa_maps_open(struct inode *inode, struct file *file, | |
1271 | const struct seq_operations *ops) | |
662795de | 1272 | { |
5b52fc89 SW |
1273 | struct numa_maps_private *priv; |
1274 | int ret = -ENOMEM; | |
1275 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); | |
1276 | if (priv) { | |
1277 | priv->proc_maps.pid = proc_pid(inode); | |
b7643757 | 1278 | ret = seq_open(file, ops); |
5b52fc89 SW |
1279 | if (!ret) { |
1280 | struct seq_file *m = file->private_data; | |
1281 | m->private = priv; | |
1282 | } else { | |
1283 | kfree(priv); | |
1284 | } | |
1285 | } | |
1286 | return ret; | |
662795de EB |
1287 | } |
1288 | ||
b7643757 SP |
1289 | static int pid_numa_maps_open(struct inode *inode, struct file *file) |
1290 | { | |
1291 | return numa_maps_open(inode, file, &proc_pid_numa_maps_op); | |
1292 | } | |
1293 | ||
1294 | static int tid_numa_maps_open(struct inode *inode, struct file *file) | |
1295 | { | |
1296 | return numa_maps_open(inode, file, &proc_tid_numa_maps_op); | |
1297 | } | |
1298 | ||
1299 | const struct file_operations proc_pid_numa_maps_operations = { | |
1300 | .open = pid_numa_maps_open, | |
1301 | .read = seq_read, | |
1302 | .llseek = seq_lseek, | |
1303 | .release = seq_release_private, | |
1304 | }; | |
1305 | ||
1306 | const struct file_operations proc_tid_numa_maps_operations = { | |
1307 | .open = tid_numa_maps_open, | |
662795de EB |
1308 | .read = seq_read, |
1309 | .llseek = seq_lseek, | |
99f89551 | 1310 | .release = seq_release_private, |
662795de | 1311 | }; |
f69ff943 | 1312 | #endif /* CONFIG_NUMA */ |