This source file includes following definitions.
- read_core
- get_loadavg
- get_kstat
- get_uptime
- get_meminfo
- get_version
- get_cpuinfo
- get_task
- get_phys_addr
- get_array
- get_env
- get_arg
- get_wchan
- get_stat
- get_statm
- get_maps
- get_root_array
- get_process_array
- fill_array
- array_read
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21 #include <linux/types.h>
22 #include <linux/errno.h>
23 #include <linux/sched.h>
24 #include <linux/kernel.h>
25 #include <linux/kernel_stat.h>
26 #include <linux/tty.h>
27 #include <linux/user.h>
28 #include <linux/a.out.h>
29 #include <linux/string.h>
30 #include <linux/mman.h>
31 #include <linux/proc_fs.h>
32
33 #include <asm/segment.h>
34 #include <asm/io.h>
35
36 #define LOAD_INT(x) ((x) >> FSHIFT)
37 #define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100)
38
39 #ifdef CONFIG_DEBUG_MALLOC
40 int get_malloc(char * buffer);
41 #endif
42
43 static int read_core(struct inode * inode, struct file * file,char * buf, int count)
44 {
45 unsigned long p = file->f_pos;
46 int read;
47 int count1;
48 char * pnt;
49 struct user dump;
50
51 memset(&dump, 0, sizeof(struct user));
52 dump.magic = CMAGIC;
53 dump.u_dsize = high_memory >> 12;
54
55 if (count < 0)
56 return -EINVAL;
57 if (p >= high_memory + PAGE_SIZE)
58 return 0;
59 if (count > high_memory + PAGE_SIZE - p)
60 count = high_memory + PAGE_SIZE - p;
61 read = 0;
62
63 if (p < sizeof(struct user) && count > 0) {
64 count1 = count;
65 if (p + count1 > sizeof(struct user))
66 count1 = sizeof(struct user)-p;
67 pnt = (char *) &dump + p;
68 memcpy_tofs(buf,(void *) pnt, count1);
69 buf += count1;
70 p += count1;
71 count -= count1;
72 read += count1;
73 }
74
75 while (p < 2*PAGE_SIZE && count > 0) {
76 put_fs_byte(0,buf);
77 buf++;
78 p++;
79 count--;
80 read++;
81 }
82 memcpy_tofs(buf,(void *) (p - PAGE_SIZE),count);
83 read += count;
84 file->f_pos += read;
85 return read;
86 }
87
88 static struct file_operations proc_kcore_operations = {
89 NULL,
90 read_core,
91 };
92
93 struct inode_operations proc_kcore_inode_operations = {
94 &proc_kcore_operations,
95 };
96
97 static int get_loadavg(char * buffer)
98 {
99 int a, b, c;
100
101 a = avenrun[0] + (FIXED_1/200);
102 b = avenrun[1] + (FIXED_1/200);
103 c = avenrun[2] + (FIXED_1/200);
104 return sprintf(buffer,"%d.%02d %d.%02d %d.%02d\n",
105 LOAD_INT(a), LOAD_FRAC(a),
106 LOAD_INT(b), LOAD_FRAC(b),
107 LOAD_INT(c), LOAD_FRAC(c));
108 }
109
110 static int get_kstat(char * buffer)
111 {
112 int i, len;
113 unsigned sum = 0;
114
115 for (i = 0 ; i < 16 ; i++)
116 sum += kstat.interrupts[i];
117 len = sprintf(buffer,
118 "cpu %u %u %u %lu\n"
119 "disk %u %u %u %u\n"
120 "page %u %u\n"
121 "swap %u %u\n"
122 "intr %u",
123 kstat.cpu_user,
124 kstat.cpu_nice,
125 kstat.cpu_system,
126 jiffies - (kstat.cpu_user + kstat.cpu_nice + kstat.cpu_system),
127 kstat.dk_drive[0],
128 kstat.dk_drive[1],
129 kstat.dk_drive[2],
130 kstat.dk_drive[3],
131 kstat.pgpgin,
132 kstat.pgpgout,
133 kstat.pswpin,
134 kstat.pswpout,
135 sum);
136 for (i = 0 ; i < 16 ; i++)
137 len += sprintf(buffer + len, " %u", kstat.interrupts[i]);
138 len += sprintf(buffer + len,
139 "\nctxt %u\n"
140 "btime %lu\n",
141 kstat.context_swtch,
142 xtime.tv_sec - jiffies / HZ);
143 return len;
144 }
145
146
147 static int get_uptime(char * buffer)
148 {
149 unsigned long uptime;
150 unsigned long idle;
151
152 uptime = jiffies;
153 idle = task[0]->utime + task[0]->stime;
154 return sprintf(buffer,"%lu.%02lu %lu.%02lu\n",
155 uptime / HZ,
156 uptime % HZ,
157 idle / HZ,
158 idle % HZ);
159 }
160
161 static int get_meminfo(char * buffer)
162 {
163 struct sysinfo i;
164
165 si_meminfo(&i);
166 si_swapinfo(&i);
167 return sprintf(buffer, " total: used: free: shared: buffers:\n"
168 "Mem: %8lu %8lu %8lu %8lu %8lu\n"
169 "Swap: %8lu %8lu %8lu\n",
170 i.totalram, i.totalram-i.freeram, i.freeram, i.sharedram, i.bufferram,
171 i.totalswap, i.totalswap-i.freeswap, i.freeswap);
172 }
173
174 static int get_version(char * buffer)
175 {
176 extern char *linux_banner;
177
178 strcpy(buffer, linux_banner);
179 return strlen(buffer);
180 }
181
182 static int get_cpuinfo(char * buffer)
183 {
184 return sprintf(buffer,"cpu : %d86\n"
185 "vid : %s\n"
186 "fdiv_bug : %s\n"
187 "math : %s\n"
188 "hlt : %s\n"
189 "wp : %s\n",
190 x86,
191 x86_vendor_id,
192 fdiv_bug ? "yes" : "no",
193 hard_math ? "yes" : "no",
194 hlt_works_ok ? "yes" : "no",
195 wp_works_ok ? "yes" : "no");
196 }
197
198 static struct task_struct ** get_task(pid_t pid)
199 {
200 struct task_struct ** p;
201
202 p = task;
203 while (++p < task+NR_TASKS) {
204 if (*p && (*p)->pid == pid)
205 return p;
206 }
207 return NULL;
208 }
209
210 static unsigned long get_phys_addr(struct task_struct ** p, unsigned long ptr)
211 {
212 unsigned long page;
213
214 if (!p || !*p || ptr >= TASK_SIZE)
215 return 0;
216 page = *PAGE_DIR_OFFSET((*p)->tss.cr3,ptr);
217 if (!(page & PAGE_PRESENT))
218 return 0;
219 page &= PAGE_MASK;
220 page += PAGE_PTR(ptr);
221 page = *(unsigned long *) page;
222 if (!(page & PAGE_PRESENT))
223 return 0;
224 page &= PAGE_MASK;
225 page += ptr & ~PAGE_MASK;
226 return page;
227 }
228
229 static int get_array(struct task_struct ** p, unsigned long start, unsigned long end, char * buffer)
230 {
231 unsigned long addr;
232 int size = 0, result = 0;
233 char c;
234
235 if (start >= end)
236 return result;
237 for (;;) {
238 addr = get_phys_addr(p, start);
239 if (!addr)
240 goto ready;
241 do {
242 c = *(char *) addr;
243 if (!c)
244 result = size;
245 if (size < PAGE_SIZE)
246 buffer[size++] = c;
247 else
248 goto ready;
249 addr++;
250 start++;
251 if (!c && start >= end)
252 goto ready;
253 } while (addr & ~PAGE_MASK);
254 }
255 ready:
256
257 while (result>0 && buffer[result-1]==' ')
258 result--;
259 return result;
260 }
261
262 static int get_env(int pid, char * buffer)
263 {
264 struct task_struct ** p = get_task(pid);
265
266 if (!p || !*p)
267 return 0;
268 return get_array(p, (*p)->mm->env_start, (*p)->mm->env_end, buffer);
269 }
270
271 static int get_arg(int pid, char * buffer)
272 {
273 struct task_struct ** p = get_task(pid);
274
275 if (!p || !*p)
276 return 0;
277 return get_array(p, (*p)->mm->arg_start, (*p)->mm->arg_end, buffer);
278 }
279
280 static unsigned long get_wchan(struct task_struct *p)
281 {
282 unsigned long ebp, eip;
283 unsigned long stack_page;
284 int count = 0;
285
286 if (!p || p == current || p->state == TASK_RUNNING)
287 return 0;
288 stack_page = p->kernel_stack_page;
289 if (!stack_page)
290 return 0;
291 ebp = p->tss.ebp;
292 do {
293 if (ebp < stack_page || ebp >= 4092+stack_page)
294 return 0;
295 eip = *(unsigned long *) (ebp+4);
296 if ((void *)eip != sleep_on &&
297 (void *)eip != interruptible_sleep_on)
298 return eip;
299 ebp = *(unsigned long *) ebp;
300 } while (count++ < 16);
301 return 0;
302 }
303
304 #define KSTK_EIP(stack) (((unsigned long *)stack)[1019])
305 #define KSTK_ESP(stack) (((unsigned long *)stack)[1022])
306
307 static int get_stat(int pid, char * buffer)
308 {
309 struct task_struct ** p = get_task(pid);
310 unsigned long sigignore=0, sigcatch=0, bit=1, wchan;
311 unsigned long vsize, eip, esp;
312 int i,tty_pgrp;
313 char state;
314
315 if (!p || !*p)
316 return 0;
317 if ((*p)->state < 0 || (*p)->state > 5)
318 state = '.';
319 else
320 state = "RSDZTD"[(*p)->state];
321 eip = esp = 0;
322 vsize = (*p)->kernel_stack_page;
323 if (vsize) {
324 eip = KSTK_EIP(vsize);
325 esp = KSTK_ESP(vsize);
326 vsize = (*p)->mm->brk - (*p)->mm->start_code + PAGE_SIZE-1;
327 if (esp)
328 vsize += TASK_SIZE - esp;
329 }
330 wchan = get_wchan(*p);
331 for(i=0; i<32; ++i) {
332 switch((int) (*p)->sigaction[i].sa_handler) {
333 case 1: sigignore |= bit; break;
334 case 0: break;
335 default: sigcatch |= bit;
336 } bit <<= 1;
337 }
338 if ((*p)->tty)
339 tty_pgrp = (*p)->tty->pgrp;
340 else
341 tty_pgrp = -1;
342 return sprintf(buffer,"%d (%s) %c %d %d %d %d %d %lu %lu \
343 %lu %lu %lu %ld %ld %ld %ld %ld %ld %lu %lu %ld %lu %lu %u %lu %lu %lu %lu %lu %lu \
344 %lu %lu %lu %lu\n",
345 pid,
346 (*p)->comm,
347 state,
348 (*p)->p_pptr->pid,
349 (*p)->pgrp,
350 (*p)->session,
351 (*p)->tty ? (*p)->tty->device : 0,
352 tty_pgrp,
353 (*p)->flags,
354 (*p)->mm->min_flt,
355 (*p)->mm->cmin_flt,
356 (*p)->mm->maj_flt,
357 (*p)->mm->cmaj_flt,
358 (*p)->utime,
359 (*p)->stime,
360 (*p)->cutime,
361 (*p)->cstime,
362 (*p)->counter,
363
364 (*p)->priority,
365
366 (*p)->timeout,
367 (*p)->it_real_value,
368 (*p)->start_time,
369 vsize,
370 (*p)->mm->rss,
371 (*p)->rlim[RLIMIT_RSS].rlim_cur,
372 (*p)->mm->start_code,
373 (*p)->mm->end_code,
374 (*p)->mm->start_stack,
375 esp,
376 eip,
377 (*p)->signal,
378 (*p)->blocked,
379 sigignore,
380 sigcatch,
381 wchan);
382 }
383
384 static int get_statm(int pid, char * buffer)
385 {
386 struct task_struct ** p = get_task(pid);
387 int i, tpag;
388 int size=0, resident=0, share=0, trs=0, lrs=0, drs=0, dt=0;
389 unsigned long ptbl, *buf, *pte, *pagedir, map_nr;
390
391 if (!p || !*p)
392 return 0;
393 tpag = (*p)->mm->end_code / PAGE_SIZE;
394 if ((*p)->state != TASK_ZOMBIE) {
395 pagedir = (unsigned long *) (*p)->tss.cr3;
396 for (i = 0; i < 0x300; ++i) {
397 if ((ptbl = pagedir[i]) == 0) {
398 tpag -= PTRS_PER_PAGE;
399 continue;
400 }
401 buf = (unsigned long *)(ptbl & PAGE_MASK);
402 for (pte = buf; pte < (buf + PTRS_PER_PAGE); ++pte) {
403 if (*pte != 0) {
404 ++size;
405 if (*pte & 1) {
406 ++resident;
407 if (tpag > 0)
408 ++trs;
409 else
410 ++drs;
411 if (i >= 15 && i < 0x2f0) {
412 ++lrs;
413 if (*pte & 0x40)
414 ++dt;
415 else
416 --drs;
417 }
418 map_nr = MAP_NR(*pte);
419 if (map_nr < (high_memory / PAGE_SIZE) && mem_map[map_nr] > 1)
420 ++share;
421 }
422 }
423 --tpag;
424 }
425 }
426 }
427 return sprintf(buffer,"%d %d %d %d %d %d %d\n",
428 size, resident, share, trs, lrs, drs, dt);
429 }
430
431 static int get_maps(int pid, char *buf)
432 {
433 int sz = 0;
434 struct task_struct **p = get_task(pid);
435 struct vm_area_struct *map;
436
437 if (!p || !*p)
438 return 0;
439
440 for(map = (*p)->mm->mmap; map != NULL; map = map->vm_next) {
441 char str[7], *cp = str;
442 int flags;
443 int end = sz + 80;
444 dev_t dev;
445 unsigned long ino;
446
447 flags = map->vm_flags;
448
449 *cp++ = flags & VM_READ ? 'r' : '-';
450 *cp++ = flags & VM_WRITE ? 'w' : '-';
451 *cp++ = flags & VM_EXEC ? 'x' : '-';
452 *cp++ = flags & VM_SHARED ? 's' : 'p';
453 *cp++ = 0;
454
455 if (end >= PAGE_SIZE) {
456 sprintf(buf+sz, "...\n");
457 break;
458 }
459
460 if (map->vm_inode != NULL) {
461 dev = map->vm_inode->i_dev;
462 ino = map->vm_inode->i_ino;
463 } else {
464 dev = 0;
465 ino = 0;
466 }
467
468 sz += sprintf(buf+sz, "%08lx-%08lx %s %08lx %02x:%02x %lu\n",
469 map->vm_start, map->vm_end, str, map->vm_offset,
470 MAJOR(dev),MINOR(dev), ino);
471 if (sz > end) {
472 printk("get_maps: end(%d) < sz(%d)\n", end, sz);
473 break;
474 }
475 }
476
477 return sz;
478 }
479
480 extern int get_module_list(char *);
481 extern int get_device_list(char *);
482 extern int get_filesystem_list(char *);
483 extern int get_ksyms_list(char *);
484 extern int get_irq_list(char *);
485 extern int get_dma_list(char *);
486 extern int get_cpuinfo(char *);
487
488 static int get_root_array(char * page, int type)
489 {
490 switch (type) {
491 case PROC_LOADAVG:
492 return get_loadavg(page);
493
494 case PROC_UPTIME:
495 return get_uptime(page);
496
497 case PROC_MEMINFO:
498 return get_meminfo(page);
499
500 case PROC_CPUINFO:
501 return get_cpuinfo(page);
502
503 case PROC_VERSION:
504 return get_version(page);
505
506 #ifdef CONFIG_DEBUG_MALLOC
507 case PROC_MALLOC:
508 return get_malloc(page);
509 #endif
510
511 case PROC_MODULES:
512 return get_module_list(page);
513
514 case PROC_STAT:
515 return get_kstat(page);
516
517 case PROC_DEVICES:
518 return get_device_list(page);
519
520 case PROC_INTERRUPTS:
521 return get_irq_list(page);
522
523 case PROC_FILESYSTEMS:
524 return get_filesystem_list(page);
525
526 case PROC_KSYMS:
527 return get_ksyms_list(page);
528
529 case PROC_DMA:
530 return get_dma_list(page);
531
532 }
533 return -EBADF;
534 }
535
536 static int get_process_array(char * page, int pid, int type)
537 {
538 switch (type) {
539 case PROC_PID_ENVIRON:
540 return get_env(pid, page);
541 case PROC_PID_CMDLINE:
542 return get_arg(pid, page);
543 case PROC_PID_STAT:
544 return get_stat(pid, page);
545 case PROC_PID_STATM:
546 return get_statm(pid, page);
547 case PROC_PID_MAPS:
548 return get_maps(pid, page);
549 }
550 return -EBADF;
551 }
552
553
554 static inline int fill_array(char * page, int pid, int type)
555 {
556 if (pid)
557 return get_process_array(page, pid, type);
558 return get_root_array(page, type);
559 }
560
561 static int array_read(struct inode * inode, struct file * file,char * buf, int count)
562 {
563 unsigned long page;
564 int length;
565 int end;
566 unsigned int type, pid;
567
568 if (count < 0)
569 return -EINVAL;
570 if (!(page = __get_free_page(GFP_KERNEL)))
571 return -ENOMEM;
572 type = inode->i_ino;
573 pid = type >> 16;
574 type &= 0x0000ffff;
575 length = fill_array((char *) page, pid, type);
576 if (length < 0) {
577 free_page(page);
578 return length;
579 }
580 if (file->f_pos >= length) {
581 free_page(page);
582 return 0;
583 }
584 if (count + file->f_pos > length)
585 count = length - file->f_pos;
586 end = count + file->f_pos;
587 memcpy_tofs(buf, (char *) page + file->f_pos, count);
588 free_page(page);
589 file->f_pos = end;
590 return count;
591 }
592
593 static struct file_operations proc_array_operations = {
594 NULL,
595 array_read,
596 NULL,
597 NULL,
598 NULL,
599 NULL,
600 NULL,
601 NULL,
602 NULL,
603 NULL
604 };
605
606 struct inode_operations proc_array_inode_operations = {
607 &proc_array_operations,
608 NULL,
609 NULL,
610 NULL,
611 NULL,
612 NULL,
613 NULL,
614 NULL,
615 NULL,
616 NULL,
617 NULL,
618 NULL,
619 NULL,
620 NULL,
621 NULL
622 };