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; | |
78 | struct task_struct *task = proc_task(inode); | |
79 | struct mm_struct * mm = get_task_mm(task); | |
80 | ||
81 | if (!mm) | |
82 | goto out; | |
83 | down_read(&mm->mmap_sem); | |
84 | ||
85 | vma = mm->mmap; | |
86 | while (vma) { | |
87 | if ((vma->vm_flags & VM_EXECUTABLE) && vma->vm_file) | |
88 | break; | |
89 | vma = vma->vm_next; | |
90 | } | |
91 | ||
92 | if (vma) { | |
93 | *mnt = mntget(vma->vm_file->f_vfsmnt); | |
94 | *dentry = dget(vma->vm_file->f_dentry); | |
95 | result = 0; | |
96 | } | |
97 | ||
98 | up_read(&mm->mmap_sem); | |
99 | mmput(mm); | |
100 | out: | |
101 | return result; | |
102 | } | |
103 | ||
104 | static void pad_len_spaces(struct seq_file *m, int len) | |
105 | { | |
106 | len = 25 + sizeof(void*) * 6 - len; | |
107 | if (len < 1) | |
108 | len = 1; | |
109 | seq_printf(m, "%*c", len, ' '); | |
110 | } | |
111 | ||
e070ad49 ML |
112 | struct mem_size_stats |
113 | { | |
114 | unsigned long resident; | |
115 | unsigned long shared_clean; | |
116 | unsigned long shared_dirty; | |
117 | unsigned long private_clean; | |
118 | unsigned long private_dirty; | |
119 | }; | |
120 | ||
121 | static int show_map_internal(struct seq_file *m, void *v, struct mem_size_stats *mss) | |
1da177e4 LT |
122 | { |
123 | struct task_struct *task = m->private; | |
e070ad49 ML |
124 | struct vm_area_struct *vma = v; |
125 | struct mm_struct *mm = vma->vm_mm; | |
126 | struct file *file = vma->vm_file; | |
127 | int flags = vma->vm_flags; | |
1da177e4 LT |
128 | unsigned long ino = 0; |
129 | dev_t dev = 0; | |
130 | int len; | |
131 | ||
132 | if (file) { | |
e070ad49 | 133 | struct inode *inode = vma->vm_file->f_dentry->d_inode; |
1da177e4 LT |
134 | dev = inode->i_sb->s_dev; |
135 | ino = inode->i_ino; | |
136 | } | |
137 | ||
138 | seq_printf(m, "%08lx-%08lx %c%c%c%c %08lx %02x:%02x %lu %n", | |
e070ad49 ML |
139 | vma->vm_start, |
140 | vma->vm_end, | |
1da177e4 LT |
141 | flags & VM_READ ? 'r' : '-', |
142 | flags & VM_WRITE ? 'w' : '-', | |
143 | flags & VM_EXEC ? 'x' : '-', | |
144 | flags & VM_MAYSHARE ? 's' : 'p', | |
e070ad49 | 145 | vma->vm_pgoff << PAGE_SHIFT, |
1da177e4 LT |
146 | MAJOR(dev), MINOR(dev), ino, &len); |
147 | ||
148 | /* | |
149 | * Print the dentry name for named mappings, and a | |
150 | * special [heap] marker for the heap: | |
151 | */ | |
e070ad49 | 152 | if (file) { |
1da177e4 | 153 | pad_len_spaces(m, len); |
e070ad49 | 154 | seq_path(m, file->f_vfsmnt, file->f_dentry, "\n"); |
1da177e4 LT |
155 | } else { |
156 | if (mm) { | |
e070ad49 ML |
157 | if (vma->vm_start <= mm->start_brk && |
158 | vma->vm_end >= mm->brk) { | |
1da177e4 LT |
159 | pad_len_spaces(m, len); |
160 | seq_puts(m, "[heap]"); | |
161 | } else { | |
e070ad49 ML |
162 | if (vma->vm_start <= mm->start_stack && |
163 | vma->vm_end >= mm->start_stack) { | |
1da177e4 LT |
164 | |
165 | pad_len_spaces(m, len); | |
166 | seq_puts(m, "[stack]"); | |
167 | } | |
168 | } | |
169 | } else { | |
170 | pad_len_spaces(m, len); | |
171 | seq_puts(m, "[vdso]"); | |
172 | } | |
173 | } | |
174 | seq_putc(m, '\n'); | |
e070ad49 ML |
175 | |
176 | if (mss) | |
177 | seq_printf(m, | |
178 | "Size: %8lu kB\n" | |
179 | "Rss: %8lu kB\n" | |
180 | "Shared_Clean: %8lu kB\n" | |
181 | "Shared_Dirty: %8lu kB\n" | |
182 | "Private_Clean: %8lu kB\n" | |
183 | "Private_Dirty: %8lu kB\n", | |
184 | (vma->vm_end - vma->vm_start) >> 10, | |
185 | mss->resident >> 10, | |
186 | mss->shared_clean >> 10, | |
187 | mss->shared_dirty >> 10, | |
188 | mss->private_clean >> 10, | |
189 | mss->private_dirty >> 10); | |
190 | ||
191 | if (m->count < m->size) /* vma is copied successfully */ | |
192 | m->version = (vma != get_gate_vma(task))? vma->vm_start: 0; | |
1da177e4 LT |
193 | return 0; |
194 | } | |
195 | ||
e070ad49 ML |
196 | static int show_map(struct seq_file *m, void *v) |
197 | { | |
0f5c79f2 | 198 | return show_map_internal(m, v, NULL); |
e070ad49 ML |
199 | } |
200 | ||
201 | static void smaps_pte_range(struct vm_area_struct *vma, pmd_t *pmd, | |
202 | unsigned long addr, unsigned long end, | |
203 | struct mem_size_stats *mss) | |
204 | { | |
205 | pte_t *pte, ptent; | |
705e87c0 | 206 | spinlock_t *ptl; |
e070ad49 ML |
207 | unsigned long pfn; |
208 | struct page *page; | |
209 | ||
705e87c0 | 210 | pte = pte_offset_map_lock(vma->vm_mm, pmd, addr, &ptl); |
e070ad49 ML |
211 | do { |
212 | ptent = *pte; | |
705e87c0 | 213 | if (!pte_present(ptent)) |
e070ad49 ML |
214 | continue; |
215 | ||
216 | mss->resident += PAGE_SIZE; | |
217 | pfn = pte_pfn(ptent); | |
218 | if (!pfn_valid(pfn)) | |
219 | continue; | |
220 | ||
221 | page = pfn_to_page(pfn); | |
222 | if (page_count(page) >= 2) { | |
223 | if (pte_dirty(ptent)) | |
224 | mss->shared_dirty += PAGE_SIZE; | |
225 | else | |
226 | mss->shared_clean += PAGE_SIZE; | |
227 | } else { | |
228 | if (pte_dirty(ptent)) | |
229 | mss->private_dirty += PAGE_SIZE; | |
230 | else | |
231 | mss->private_clean += PAGE_SIZE; | |
232 | } | |
233 | } while (pte++, addr += PAGE_SIZE, addr != end); | |
705e87c0 HD |
234 | pte_unmap_unlock(pte - 1, ptl); |
235 | cond_resched(); | |
e070ad49 ML |
236 | } |
237 | ||
238 | static inline void smaps_pmd_range(struct vm_area_struct *vma, pud_t *pud, | |
239 | unsigned long addr, unsigned long end, | |
240 | struct mem_size_stats *mss) | |
241 | { | |
242 | pmd_t *pmd; | |
243 | unsigned long next; | |
244 | ||
245 | pmd = pmd_offset(pud, addr); | |
246 | do { | |
247 | next = pmd_addr_end(addr, end); | |
248 | if (pmd_none_or_clear_bad(pmd)) | |
249 | continue; | |
250 | smaps_pte_range(vma, pmd, addr, next, mss); | |
251 | } while (pmd++, addr = next, addr != end); | |
252 | } | |
253 | ||
254 | static inline void smaps_pud_range(struct vm_area_struct *vma, pgd_t *pgd, | |
255 | unsigned long addr, unsigned long end, | |
256 | struct mem_size_stats *mss) | |
257 | { | |
258 | pud_t *pud; | |
259 | unsigned long next; | |
260 | ||
261 | pud = pud_offset(pgd, addr); | |
262 | do { | |
263 | next = pud_addr_end(addr, end); | |
264 | if (pud_none_or_clear_bad(pud)) | |
265 | continue; | |
266 | smaps_pmd_range(vma, pud, addr, next, mss); | |
267 | } while (pud++, addr = next, addr != end); | |
268 | } | |
269 | ||
270 | static inline void smaps_pgd_range(struct vm_area_struct *vma, | |
271 | unsigned long addr, unsigned long end, | |
272 | struct mem_size_stats *mss) | |
273 | { | |
274 | pgd_t *pgd; | |
275 | unsigned long next; | |
276 | ||
277 | pgd = pgd_offset(vma->vm_mm, addr); | |
278 | do { | |
279 | next = pgd_addr_end(addr, end); | |
280 | if (pgd_none_or_clear_bad(pgd)) | |
281 | continue; | |
282 | smaps_pud_range(vma, pgd, addr, next, mss); | |
283 | } while (pgd++, addr = next, addr != end); | |
284 | } | |
285 | ||
286 | static int show_smap(struct seq_file *m, void *v) | |
287 | { | |
288 | struct vm_area_struct *vma = v; | |
e070ad49 ML |
289 | struct mem_size_stats mss; |
290 | ||
291 | memset(&mss, 0, sizeof mss); | |
705e87c0 | 292 | if (vma->vm_mm) |
e070ad49 | 293 | smaps_pgd_range(vma, vma->vm_start, vma->vm_end, &mss); |
e070ad49 ML |
294 | return show_map_internal(m, v, &mss); |
295 | } | |
296 | ||
1da177e4 LT |
297 | static void *m_start(struct seq_file *m, loff_t *pos) |
298 | { | |
299 | struct task_struct *task = m->private; | |
300 | unsigned long last_addr = m->version; | |
301 | struct mm_struct *mm; | |
e070ad49 | 302 | struct vm_area_struct *vma, *tail_vma; |
1da177e4 LT |
303 | loff_t l = *pos; |
304 | ||
305 | /* | |
306 | * We remember last_addr rather than next_addr to hit with | |
307 | * mmap_cache most of the time. We have zero last_addr at | |
e070ad49 ML |
308 | * the beginning and also after lseek. We will have -1 last_addr |
309 | * after the end of the vmas. | |
1da177e4 LT |
310 | */ |
311 | ||
312 | if (last_addr == -1UL) | |
313 | return NULL; | |
314 | ||
315 | mm = get_task_mm(task); | |
316 | if (!mm) | |
317 | return NULL; | |
318 | ||
e070ad49 | 319 | tail_vma = get_gate_vma(task); |
1da177e4 LT |
320 | down_read(&mm->mmap_sem); |
321 | ||
322 | /* Start with last addr hint */ | |
e070ad49 ML |
323 | if (last_addr && (vma = find_vma(mm, last_addr))) { |
324 | vma = vma->vm_next; | |
1da177e4 LT |
325 | goto out; |
326 | } | |
327 | ||
328 | /* | |
e070ad49 | 329 | * Check the vma index is within the range and do |
1da177e4 LT |
330 | * sequential scan until m_index. |
331 | */ | |
e070ad49 | 332 | vma = NULL; |
1da177e4 | 333 | if ((unsigned long)l < mm->map_count) { |
e070ad49 ML |
334 | vma = mm->mmap; |
335 | while (l-- && vma) | |
336 | vma = vma->vm_next; | |
1da177e4 LT |
337 | goto out; |
338 | } | |
339 | ||
340 | if (l != mm->map_count) | |
e070ad49 | 341 | tail_vma = NULL; /* After gate vma */ |
1da177e4 LT |
342 | |
343 | out: | |
e070ad49 ML |
344 | if (vma) |
345 | return vma; | |
1da177e4 | 346 | |
e070ad49 ML |
347 | /* End of vmas has been reached */ |
348 | m->version = (tail_vma != NULL)? 0: -1UL; | |
1da177e4 LT |
349 | up_read(&mm->mmap_sem); |
350 | mmput(mm); | |
e070ad49 | 351 | return tail_vma; |
1da177e4 LT |
352 | } |
353 | ||
354 | static void m_stop(struct seq_file *m, void *v) | |
355 | { | |
356 | struct task_struct *task = m->private; | |
e070ad49 ML |
357 | struct vm_area_struct *vma = v; |
358 | if (vma && vma != get_gate_vma(task)) { | |
359 | struct mm_struct *mm = vma->vm_mm; | |
1da177e4 LT |
360 | up_read(&mm->mmap_sem); |
361 | mmput(mm); | |
362 | } | |
363 | } | |
364 | ||
365 | static void *m_next(struct seq_file *m, void *v, loff_t *pos) | |
366 | { | |
367 | struct task_struct *task = m->private; | |
e070ad49 ML |
368 | struct vm_area_struct *vma = v; |
369 | struct vm_area_struct *tail_vma = get_gate_vma(task); | |
1da177e4 LT |
370 | |
371 | (*pos)++; | |
e070ad49 ML |
372 | if (vma && (vma != tail_vma) && vma->vm_next) |
373 | return vma->vm_next; | |
1da177e4 | 374 | m_stop(m, v); |
e070ad49 | 375 | return (vma != tail_vma)? tail_vma: NULL; |
1da177e4 LT |
376 | } |
377 | ||
378 | struct seq_operations proc_pid_maps_op = { | |
379 | .start = m_start, | |
380 | .next = m_next, | |
381 | .stop = m_stop, | |
382 | .show = show_map | |
383 | }; | |
6e21c8f1 | 384 | |
e070ad49 ML |
385 | struct seq_operations proc_pid_smaps_op = { |
386 | .start = m_start, | |
387 | .next = m_next, | |
388 | .stop = m_stop, | |
389 | .show = show_smap | |
390 | }; | |
391 | ||
6e21c8f1 | 392 | #ifdef CONFIG_NUMA |
1a75a6c8 | 393 | extern int show_numa_map(struct seq_file *m, void *v); |
6e21c8f1 CL |
394 | |
395 | struct seq_operations proc_pid_numa_maps_op = { | |
1a75a6c8 CL |
396 | .start = m_start, |
397 | .next = m_next, | |
398 | .stop = m_stop, | |
399 | .show = show_numa_map | |
6e21c8f1 CL |
400 | }; |
401 | #endif |