Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | |
2 | #include <linux/mm.h> | |
3 | #include <linux/file.h> | |
eb28062f | 4 | #include <linux/fdtable.h> |
5ad4e53b | 5 | #include <linux/fs_struct.h> |
1da177e4 | 6 | #include <linux/mount.h> |
5096add8 | 7 | #include <linux/ptrace.h> |
5a0e3ad6 | 8 | #include <linux/slab.h> |
1da177e4 LT |
9 | #include <linux/seq_file.h> |
10 | #include "internal.h" | |
11 | ||
12 | /* | |
13 | * Logic: we've got two memory sums for each process, "shared", and | |
025dfdaf | 14 | * "non-shared". Shared memory may get counted more than once, for |
1da177e4 LT |
15 | * each process that owns it. Non-shared memory is counted |
16 | * accurately. | |
17 | */ | |
df5f8314 | 18 | void task_mem(struct seq_file *m, struct mm_struct *mm) |
1da177e4 | 19 | { |
8feae131 | 20 | struct vm_area_struct *vma; |
38f71479 | 21 | struct vm_region *region; |
8feae131 | 22 | struct rb_node *p; |
38f71479 | 23 | unsigned long bytes = 0, sbytes = 0, slack = 0, size; |
1da177e4 LT |
24 | |
25 | down_read(&mm->mmap_sem); | |
8feae131 DH |
26 | for (p = rb_first(&mm->mm_rb); p; p = rb_next(p)) { |
27 | vma = rb_entry(p, struct vm_area_struct, vm_rb); | |
1da177e4 | 28 | |
8feae131 | 29 | bytes += kobjsize(vma); |
38f71479 DH |
30 | |
31 | region = vma->vm_region; | |
32 | if (region) { | |
33 | size = kobjsize(region); | |
34 | size += region->vm_end - region->vm_start; | |
35 | } else { | |
36 | size = vma->vm_end - vma->vm_start; | |
37 | } | |
38 | ||
1da177e4 | 39 | if (atomic_read(&mm->mm_count) > 1 || |
8feae131 | 40 | vma->vm_flags & VM_MAYSHARE) { |
38f71479 | 41 | sbytes += size; |
1da177e4 | 42 | } else { |
38f71479 DH |
43 | bytes += size; |
44 | if (region) | |
45 | slack = region->vm_end - vma->vm_end; | |
1da177e4 LT |
46 | } |
47 | } | |
48 | ||
49 | if (atomic_read(&mm->mm_count) > 1) | |
50 | sbytes += kobjsize(mm); | |
51 | else | |
52 | bytes += kobjsize(mm); | |
53 | ||
498052bb | 54 | if (current->fs && current->fs->users > 1) |
1da177e4 LT |
55 | sbytes += kobjsize(current->fs); |
56 | else | |
57 | bytes += kobjsize(current->fs); | |
58 | ||
59 | if (current->files && atomic_read(¤t->files->count) > 1) | |
60 | sbytes += kobjsize(current->files); | |
61 | else | |
62 | bytes += kobjsize(current->files); | |
63 | ||
64 | if (current->sighand && atomic_read(¤t->sighand->count) > 1) | |
65 | sbytes += kobjsize(current->sighand); | |
66 | else | |
67 | bytes += kobjsize(current->sighand); | |
68 | ||
69 | bytes += kobjsize(current); /* includes kernel stack */ | |
70 | ||
df5f8314 | 71 | seq_printf(m, |
1da177e4 LT |
72 | "Mem:\t%8lu bytes\n" |
73 | "Slack:\t%8lu bytes\n" | |
74 | "Shared:\t%8lu bytes\n", | |
75 | bytes, slack, sbytes); | |
76 | ||
77 | up_read(&mm->mmap_sem); | |
1da177e4 LT |
78 | } |
79 | ||
80 | unsigned long task_vsize(struct mm_struct *mm) | |
81 | { | |
8feae131 DH |
82 | struct vm_area_struct *vma; |
83 | struct rb_node *p; | |
1da177e4 LT |
84 | unsigned long vsize = 0; |
85 | ||
86 | down_read(&mm->mmap_sem); | |
8feae131 DH |
87 | for (p = rb_first(&mm->mm_rb); p; p = rb_next(p)) { |
88 | vma = rb_entry(p, struct vm_area_struct, vm_rb); | |
38f71479 | 89 | vsize += vma->vm_end - vma->vm_start; |
1da177e4 LT |
90 | } |
91 | up_read(&mm->mmap_sem); | |
92 | return vsize; | |
93 | } | |
94 | ||
a2ade7b6 AD |
95 | unsigned long task_statm(struct mm_struct *mm, |
96 | unsigned long *shared, unsigned long *text, | |
97 | unsigned long *data, unsigned long *resident) | |
1da177e4 | 98 | { |
8feae131 | 99 | struct vm_area_struct *vma; |
38f71479 | 100 | struct vm_region *region; |
8feae131 | 101 | struct rb_node *p; |
a2ade7b6 | 102 | unsigned long size = kobjsize(mm); |
1da177e4 LT |
103 | |
104 | down_read(&mm->mmap_sem); | |
8feae131 DH |
105 | for (p = rb_first(&mm->mm_rb); p; p = rb_next(p)) { |
106 | vma = rb_entry(p, struct vm_area_struct, vm_rb); | |
107 | size += kobjsize(vma); | |
38f71479 DH |
108 | region = vma->vm_region; |
109 | if (region) { | |
110 | size += kobjsize(region); | |
111 | size += region->vm_end - region->vm_start; | |
112 | } | |
1da177e4 LT |
113 | } |
114 | ||
7e1e0ef2 SM |
115 | *text = (PAGE_ALIGN(mm->end_code) - (mm->start_code & PAGE_MASK)) |
116 | >> PAGE_SHIFT; | |
117 | *data = (PAGE_ALIGN(mm->start_stack) - (mm->start_data & PAGE_MASK)) | |
118 | >> PAGE_SHIFT; | |
1da177e4 | 119 | up_read(&mm->mmap_sem); |
7e1e0ef2 SM |
120 | size >>= PAGE_SHIFT; |
121 | size += *text + *data; | |
1da177e4 LT |
122 | *resident = size; |
123 | return size; | |
124 | } | |
125 | ||
3c26c9d9 MF |
126 | static void pad_len_spaces(struct seq_file *m, int len) |
127 | { | |
128 | len = 25 + sizeof(void*) * 6 - len; | |
129 | if (len < 1) | |
130 | len = 1; | |
131 | seq_printf(m, "%*c", len, ' '); | |
132 | } | |
133 | ||
8feae131 DH |
134 | /* |
135 | * display a single VMA to a sequenced file | |
136 | */ | |
b7643757 SP |
137 | static int nommu_vma_show(struct seq_file *m, struct vm_area_struct *vma, |
138 | int is_pid) | |
8feae131 | 139 | { |
3c26c9d9 | 140 | struct mm_struct *mm = vma->vm_mm; |
b7643757 | 141 | struct proc_maps_private *priv = m->private; |
8feae131 DH |
142 | unsigned long ino = 0; |
143 | struct file *file; | |
144 | dev_t dev = 0; | |
145 | int flags, len; | |
6260a4b0 | 146 | unsigned long long pgoff = 0; |
8feae131 DH |
147 | |
148 | flags = vma->vm_flags; | |
149 | file = vma->vm_file; | |
150 | ||
151 | if (file) { | |
496ad9aa | 152 | struct inode *inode = file_inode(vma->vm_file); |
8feae131 DH |
153 | dev = inode->i_sb->s_dev; |
154 | ino = inode->i_ino; | |
4c967291 | 155 | pgoff = (loff_t)vma->vm_pgoff << PAGE_SHIFT; |
8feae131 DH |
156 | } |
157 | ||
158 | seq_printf(m, | |
33e5d769 | 159 | "%08lx-%08lx %c%c%c%c %08llx %02x:%02x %lu %n", |
8feae131 DH |
160 | vma->vm_start, |
161 | vma->vm_end, | |
162 | flags & VM_READ ? 'r' : '-', | |
163 | flags & VM_WRITE ? 'w' : '-', | |
164 | flags & VM_EXEC ? 'x' : '-', | |
165 | flags & VM_MAYSHARE ? flags & VM_SHARED ? 'S' : 's' : 'p', | |
6260a4b0 | 166 | pgoff, |
8feae131 DH |
167 | MAJOR(dev), MINOR(dev), ino, &len); |
168 | ||
169 | if (file) { | |
3c26c9d9 | 170 | pad_len_spaces(m, len); |
8feae131 | 171 | seq_path(m, &file->f_path, ""); |
3c26c9d9 | 172 | } else if (mm) { |
b7643757 SP |
173 | pid_t tid = vm_is_stack(priv->task, vma, is_pid); |
174 | ||
175 | if (tid != 0) { | |
3c26c9d9 | 176 | pad_len_spaces(m, len); |
b7643757 SP |
177 | /* |
178 | * Thread stack in /proc/PID/task/TID/maps or | |
179 | * the main process stack. | |
180 | */ | |
181 | if (!is_pid || (vma->vm_start <= mm->start_stack && | |
182 | vma->vm_end >= mm->start_stack)) | |
183 | seq_printf(m, "[stack]"); | |
184 | else | |
185 | seq_printf(m, "[stack:%d]", tid); | |
3c26c9d9 | 186 | } |
8feae131 DH |
187 | } |
188 | ||
189 | seq_putc(m, '\n'); | |
190 | return 0; | |
191 | } | |
192 | ||
1da177e4 | 193 | /* |
dbf8685c | 194 | * display mapping lines for a particular process's /proc/pid/maps |
1da177e4 | 195 | */ |
b7643757 | 196 | static int show_map(struct seq_file *m, void *_p, int is_pid) |
1da177e4 | 197 | { |
8feae131 | 198 | struct rb_node *p = _p; |
5096add8 | 199 | |
b7643757 SP |
200 | return nommu_vma_show(m, rb_entry(p, struct vm_area_struct, vm_rb), |
201 | is_pid); | |
202 | } | |
203 | ||
204 | static int show_pid_map(struct seq_file *m, void *_p) | |
205 | { | |
206 | return show_map(m, _p, 1); | |
207 | } | |
208 | ||
209 | static int show_tid_map(struct seq_file *m, void *_p) | |
210 | { | |
211 | return show_map(m, _p, 0); | |
1da177e4 | 212 | } |
dbf8685c | 213 | |
1da177e4 LT |
214 | static void *m_start(struct seq_file *m, loff_t *pos) |
215 | { | |
dbf8685c | 216 | struct proc_maps_private *priv = m->private; |
dbf8685c | 217 | struct mm_struct *mm; |
8feae131 | 218 | struct rb_node *p; |
dbf8685c DH |
219 | loff_t n = *pos; |
220 | ||
221 | /* pin the task and mm whilst we play with them */ | |
222 | priv->task = get_pid_task(priv->pid, PIDTYPE_PID); | |
223 | if (!priv->task) | |
ec6fd8a4 | 224 | return ERR_PTR(-ESRCH); |
dbf8685c | 225 | |
e7dcd999 | 226 | mm = mm_access(priv->task, PTRACE_MODE_READ); |
ec6fd8a4 | 227 | if (!mm || IS_ERR(mm)) { |
dbf8685c DH |
228 | put_task_struct(priv->task); |
229 | priv->task = NULL; | |
ec6fd8a4 | 230 | return mm; |
dbf8685c | 231 | } |
00f89d21 | 232 | down_read(&mm->mmap_sem); |
dbf8685c | 233 | |
dbf8685c | 234 | /* start from the Nth VMA */ |
8feae131 | 235 | for (p = rb_first(&mm->mm_rb); p; p = rb_next(p)) |
dbf8685c | 236 | if (n-- == 0) |
8feae131 | 237 | return p; |
1da177e4 LT |
238 | return NULL; |
239 | } | |
dbf8685c DH |
240 | |
241 | static void m_stop(struct seq_file *m, void *_vml) | |
1da177e4 | 242 | { |
dbf8685c DH |
243 | struct proc_maps_private *priv = m->private; |
244 | ||
245 | if (priv->task) { | |
246 | struct mm_struct *mm = priv->task->mm; | |
247 | up_read(&mm->mmap_sem); | |
248 | mmput(mm); | |
249 | put_task_struct(priv->task); | |
250 | } | |
1da177e4 | 251 | } |
dbf8685c | 252 | |
8feae131 | 253 | static void *m_next(struct seq_file *m, void *_p, loff_t *pos) |
1da177e4 | 254 | { |
8feae131 | 255 | struct rb_node *p = _p; |
dbf8685c DH |
256 | |
257 | (*pos)++; | |
8feae131 | 258 | return p ? rb_next(p) : NULL; |
1da177e4 | 259 | } |
dbf8685c | 260 | |
03a44825 | 261 | static const struct seq_operations proc_pid_maps_ops = { |
1da177e4 LT |
262 | .start = m_start, |
263 | .next = m_next, | |
264 | .stop = m_stop, | |
b7643757 SP |
265 | .show = show_pid_map |
266 | }; | |
267 | ||
268 | static const struct seq_operations proc_tid_maps_ops = { | |
269 | .start = m_start, | |
270 | .next = m_next, | |
271 | .stop = m_stop, | |
272 | .show = show_tid_map | |
1da177e4 | 273 | }; |
662795de | 274 | |
b7643757 SP |
275 | static int maps_open(struct inode *inode, struct file *file, |
276 | const struct seq_operations *ops) | |
662795de | 277 | { |
dbf8685c DH |
278 | struct proc_maps_private *priv; |
279 | int ret = -ENOMEM; | |
280 | ||
281 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); | |
282 | if (priv) { | |
283 | priv->pid = proc_pid(inode); | |
b7643757 | 284 | ret = seq_open(file, ops); |
dbf8685c DH |
285 | if (!ret) { |
286 | struct seq_file *m = file->private_data; | |
287 | m->private = priv; | |
288 | } else { | |
289 | kfree(priv); | |
290 | } | |
662795de EB |
291 | } |
292 | return ret; | |
293 | } | |
294 | ||
b7643757 SP |
295 | static int pid_maps_open(struct inode *inode, struct file *file) |
296 | { | |
297 | return maps_open(inode, file, &proc_pid_maps_ops); | |
298 | } | |
299 | ||
300 | static int tid_maps_open(struct inode *inode, struct file *file) | |
301 | { | |
302 | return maps_open(inode, file, &proc_tid_maps_ops); | |
303 | } | |
304 | ||
305 | const struct file_operations proc_pid_maps_operations = { | |
306 | .open = pid_maps_open, | |
307 | .read = seq_read, | |
308 | .llseek = seq_lseek, | |
309 | .release = seq_release_private, | |
310 | }; | |
311 | ||
312 | const struct file_operations proc_tid_maps_operations = { | |
313 | .open = tid_maps_open, | |
662795de EB |
314 | .read = seq_read, |
315 | .llseek = seq_lseek, | |
dbf8685c | 316 | .release = seq_release_private, |
662795de EB |
317 | }; |
318 |