This source file includes following definitions.
- read_core
- read_profile
- write_profile
- 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
- statm_pte_range
- statm_pmd_range
- statm_pgd_range
- get_statm
- read_maps
- get_root_array
- get_process_array
- fill_array
- array_read
- arraylong_read
1 #define THREE_LEVEL
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30
31 #include <linux/types.h>
32 #include <linux/errno.h>
33 #include <linux/sched.h>
34 #include <linux/kernel.h>
35 #include <linux/kernel_stat.h>
36 #include <linux/tty.h>
37 #include <linux/user.h>
38 #include <linux/a.out.h>
39 #include <linux/string.h>
40 #include <linux/mman.h>
41 #include <linux/proc_fs.h>
42 #include <linux/ioport.h>
43 #include <linux/config.h>
44 #include <linux/delay.h>
45 #include <linux/mm.h>
46
47 #include <asm/segment.h>
48 #include <asm/pgtable.h>
49 #include <asm/io.h>
50
51 #define LOAD_INT(x) ((x) >> FSHIFT)
52 #define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100)
53
54 #ifdef CONFIG_DEBUG_MALLOC
55 int get_malloc(char * buffer);
56 #endif
57
58
59 static int read_core(struct inode * inode, struct file * file,char * buf, int count)
60 {
61 unsigned long p = file->f_pos;
62 int read;
63 int count1;
64 char * pnt;
65 struct user dump;
66
67 memset(&dump, 0, sizeof(struct user));
68 dump.magic = CMAGIC;
69 dump.u_dsize = high_memory >> 12;
70
71 if (count < 0)
72 return -EINVAL;
73 if (p >= high_memory + PAGE_SIZE)
74 return 0;
75 if (count > high_memory + PAGE_SIZE - p)
76 count = high_memory + PAGE_SIZE - p;
77 read = 0;
78
79 if (p < sizeof(struct user) && count > 0) {
80 count1 = count;
81 if (p + count1 > sizeof(struct user))
82 count1 = sizeof(struct user)-p;
83 pnt = (char *) &dump + p;
84 memcpy_tofs(buf,(void *) pnt, count1);
85 buf += count1;
86 p += count1;
87 count -= count1;
88 read += count1;
89 }
90
91 while (p < 2*PAGE_SIZE && count > 0) {
92 put_fs_byte(0,buf);
93 buf++;
94 p++;
95 count--;
96 read++;
97 }
98 memcpy_tofs(buf,(void *) (p - PAGE_SIZE),count);
99 read += count;
100 file->f_pos += read;
101 return read;
102 }
103
104 static struct file_operations proc_kcore_operations = {
105 NULL,
106 read_core,
107 };
108
109 struct inode_operations proc_kcore_inode_operations = {
110 &proc_kcore_operations,
111 };
112
113
114 #ifdef CONFIG_PROFILE
115
116 extern unsigned long prof_len;
117 extern unsigned long * prof_buffer;
118
119
120
121
122
123
124 static int read_profile(struct inode *inode, struct file *file, char *buf, int count)
125 {
126 unsigned long p = file->f_pos;
127 int read;
128 char * pnt;
129 unsigned long sample_step = 1 << CONFIG_PROFILE_SHIFT;
130
131 if (count < 0)
132 return -EINVAL;
133 if (p >= (prof_len+1)*sizeof(unsigned long))
134 return 0;
135 if (count > (prof_len+1)*sizeof(unsigned long) - p)
136 count = (prof_len+1)*sizeof(unsigned long) - p;
137 read = 0;
138
139 while (p < sizeof(unsigned long) && count > 0) {
140 put_fs_byte(*((char *)(&sample_step)+p),buf);
141 buf++; p++; count--; read++;
142 }
143 pnt = (char *)prof_buffer + p - sizeof(unsigned long);
144 memcpy_tofs(buf,(void *)pnt,count);
145 read += count;
146 file->f_pos += read;
147 return read;
148 }
149
150
151 static int write_profile(struct inode * inode, struct file * file, char * buf, int count)
152 {
153 int i=prof_len;
154
155 while (i--)
156 prof_buffer[i]=0UL;
157 return count;
158 }
159
160 static struct file_operations proc_profile_operations = {
161 NULL,
162 read_profile,
163 write_profile,
164 };
165
166 struct inode_operations proc_profile_inode_operations = {
167 &proc_profile_operations,
168 };
169
170 #endif
171
172
173 static int get_loadavg(char * buffer)
174 {
175 int a, b, c;
176
177 a = avenrun[0] + (FIXED_1/200);
178 b = avenrun[1] + (FIXED_1/200);
179 c = avenrun[2] + (FIXED_1/200);
180 return sprintf(buffer,"%d.%02d %d.%02d %d.%02d\n",
181 LOAD_INT(a), LOAD_FRAC(a),
182 LOAD_INT(b), LOAD_FRAC(b),
183 LOAD_INT(c), LOAD_FRAC(c));
184 }
185
186 static int get_kstat(char * buffer)
187 {
188 int i, len;
189 unsigned sum = 0;
190
191 for (i = 0 ; i < 16 ; i++)
192 sum += kstat.interrupts[i];
193 len = sprintf(buffer,
194 "cpu %u %u %u %lu\n"
195 "disk %u %u %u %u\n"
196 "page %u %u\n"
197 "swap %u %u\n"
198 "intr %u",
199 kstat.cpu_user,
200 kstat.cpu_nice,
201 kstat.cpu_system,
202 jiffies - (kstat.cpu_user + kstat.cpu_nice + kstat.cpu_system),
203 kstat.dk_drive[0],
204 kstat.dk_drive[1],
205 kstat.dk_drive[2],
206 kstat.dk_drive[3],
207 kstat.pgpgin,
208 kstat.pgpgout,
209 kstat.pswpin,
210 kstat.pswpout,
211 sum);
212 for (i = 0 ; i < 16 ; i++)
213 len += sprintf(buffer + len, " %u", kstat.interrupts[i]);
214 len += sprintf(buffer + len,
215 "\nctxt %u\n"
216 "btime %lu\n",
217 kstat.context_swtch,
218 xtime.tv_sec - jiffies / HZ);
219 return len;
220 }
221
222
223 static int get_uptime(char * buffer)
224 {
225 unsigned long uptime;
226 unsigned long idle;
227
228 uptime = jiffies;
229 idle = task[0]->utime + task[0]->stime;
230
231
232
233
234
235
236
237
238
239
240 #if HZ!=100
241 return sprintf(buffer,"%lu.%02lu %lu.%02lu\n",
242 uptime / HZ,
243 (((uptime % HZ) * 100) / HZ) % 100,
244 idle / HZ,
245 (((idle % HZ) * 100) / HZ) % 100);
246 #else
247 return sprintf(buffer,"%lu.%02lu %lu.%02lu\n",
248 uptime / HZ,
249 uptime % HZ,
250 idle / HZ,
251 idle % HZ);
252 #endif
253 }
254
255 static int get_meminfo(char * buffer)
256 {
257 struct sysinfo i;
258
259 si_meminfo(&i);
260 si_swapinfo(&i);
261 return sprintf(buffer, " total: used: free: shared: buffers:\n"
262 "Mem: %8lu %8lu %8lu %8lu %8lu\n"
263 "Swap: %8lu %8lu %8lu\n",
264 i.totalram, i.totalram-i.freeram, i.freeram, i.sharedram, i.bufferram,
265 i.totalswap, i.totalswap-i.freeswap, i.freeswap);
266 }
267
268 static int get_version(char * buffer)
269 {
270 extern char *linux_banner;
271
272 strcpy(buffer, linux_banner);
273 return strlen(buffer);
274 }
275
276 static int get_cpuinfo(char * buffer)
277 {
278 #ifdef __i386__
279 char *model[2][9]={{"DX","SX","DX/2","4","SX/2","6",
280 "7","DX/4"},
281 {"Pentium 60/66","Pentium 90/100","3",
282 "4","5","6","7","8"}};
283 char mask[2];
284 mask[0] = x86_mask+'@';
285 mask[1] = '\0';
286 return sprintf(buffer,"cpu\t\t: %c86\n"
287 "model\t\t: %s\n"
288 "mask\t\t: %s\n"
289 "vid\t\t: %s\n"
290 "fdiv_bug\t: %s\n"
291 "math\t\t: %s\n"
292 "hlt\t\t: %s\n"
293 "wp\t\t: %s\n"
294 "Integrated NPU\t: %s\n"
295 "Enhanced VM86\t: %s\n"
296 "IO Breakpoints\t: %s\n"
297 "4MB Pages\t: %s\n"
298 "TS Counters\t: %s\n"
299 "Pentium MSR\t: %s\n"
300 "Mach. Ch. Exep.\t: %s\n"
301 "CMPXCHGB8B\t: %s\n"
302 "BogoMips\t: %lu.%02lu\n",
303 x86+'0',
304 x86_model ? model[x86-4][x86_model-1] : "Unknown",
305 x86_mask ? mask : "Unknown",
306 x86_vendor_id,
307 fdiv_bug ? "yes" : "no",
308 hard_math ? "yes" : "no",
309 hlt_works_ok ? "yes" : "no",
310 wp_works_ok ? "yes" : "no",
311 x86_capability & 1 ? "yes" : "no",
312 x86_capability & 2 ? "yes" : "no",
313 x86_capability & 4 ? "yes" : "no",
314 x86_capability & 8 ? "yes" : "no",
315 x86_capability & 16 ? "yes" : "no",
316 x86_capability & 32 ? "yes" : "no",
317 x86_capability & 128 ? "yes" : "no",
318 x86_capability & 256 ? "yes" : "no",
319 loops_per_sec/500000, (loops_per_sec/5000) % 100
320 );
321 #else
322 return 0;
323 #endif
324 }
325
326 static struct task_struct ** get_task(pid_t pid)
327 {
328 struct task_struct ** p;
329
330 p = task;
331 while (++p < task+NR_TASKS) {
332 if (*p && (*p)->pid == pid)
333 return p;
334 }
335 return NULL;
336 }
337
338 static unsigned long get_phys_addr(struct task_struct * p, unsigned long ptr)
339 {
340 pgd_t *page_dir;
341 pmd_t *page_middle;
342 pte_t pte;
343
344 if (!p || ptr >= TASK_SIZE)
345 return 0;
346 page_dir = pgd_offset(p,ptr);
347 if (pgd_none(*page_dir))
348 return 0;
349 if (pgd_bad(*page_dir)) {
350 printk("bad page directory entry %08lx\n", pgd_val(*page_dir));
351 pgd_clear(page_dir);
352 return 0;
353 }
354 page_middle = pmd_offset(page_dir,ptr);
355 if (pmd_none(*page_middle))
356 return 0;
357 if (pmd_bad(*page_middle)) {
358 printk("bad page middle entry %08lx\n", pmd_val(*page_middle));
359 pmd_clear(page_middle);
360 return 0;
361 }
362 pte = *pte_offset(page_middle,ptr);
363 if (!pte_present(pte))
364 return 0;
365 return pte_page(pte) + (ptr & ~PAGE_MASK);
366 }
367
368 static int get_array(struct task_struct ** p, unsigned long start, unsigned long end, char * buffer)
369 {
370 unsigned long addr;
371 int size = 0, result = 0;
372 char c;
373
374 if (start >= end)
375 return result;
376 for (;;) {
377 addr = get_phys_addr(*p, start);
378 if (!addr)
379 goto ready;
380 do {
381 c = *(char *) addr;
382 if (!c)
383 result = size;
384 if (size < PAGE_SIZE)
385 buffer[size++] = c;
386 else
387 goto ready;
388 addr++;
389 start++;
390 if (!c && start >= end)
391 goto ready;
392 } while (addr & ~PAGE_MASK);
393 }
394 ready:
395
396 while (result>0 && buffer[result-1]==' ')
397 result--;
398 return result;
399 }
400
401 static int get_env(int pid, char * buffer)
402 {
403 struct task_struct ** p = get_task(pid);
404
405 if (!p || !*p)
406 return 0;
407 return get_array(p, (*p)->mm->env_start, (*p)->mm->env_end, buffer);
408 }
409
410 static int get_arg(int pid, char * buffer)
411 {
412 struct task_struct ** p = get_task(pid);
413
414 if (!p || !*p)
415 return 0;
416 return get_array(p, (*p)->mm->arg_start, (*p)->mm->arg_end, buffer);
417 }
418
419 static unsigned long get_wchan(struct task_struct *p)
420 {
421 #ifdef __i386__
422 unsigned long ebp, eip;
423 unsigned long stack_page;
424 int count = 0;
425
426 if (!p || p == current || p->state == TASK_RUNNING)
427 return 0;
428 stack_page = p->kernel_stack_page;
429 if (!stack_page)
430 return 0;
431 ebp = p->tss.ebp;
432 do {
433 if (ebp < stack_page || ebp >= 4092+stack_page)
434 return 0;
435 eip = *(unsigned long *) (ebp+4);
436 if ((void *)eip != sleep_on &&
437 (void *)eip != interruptible_sleep_on)
438 return eip;
439 ebp = *(unsigned long *) ebp;
440 } while (count++ < 16);
441 #endif
442 return 0;
443 }
444
445 #define KSTK_EIP(stack) (((unsigned long *)stack)[1019])
446 #define KSTK_ESP(stack) (((unsigned long *)stack)[1022])
447
448 static int get_stat(int pid, char * buffer)
449 {
450 struct task_struct ** p = get_task(pid);
451 unsigned long sigignore=0, sigcatch=0, bit=1, wchan;
452 unsigned long vsize, eip, esp;
453 int i,tty_pgrp;
454 char state;
455
456 if (!p || !*p)
457 return 0;
458 if ((*p)->state < 0 || (*p)->state > 5)
459 state = '.';
460 else
461 state = "RSDZTD"[(*p)->state];
462 eip = esp = 0;
463 vsize = (*p)->kernel_stack_page;
464 if (vsize) {
465 eip = KSTK_EIP(vsize);
466 esp = KSTK_ESP(vsize);
467 vsize = (*p)->mm->brk - (*p)->mm->start_code + PAGE_SIZE-1;
468 if (esp)
469 vsize += TASK_SIZE - esp;
470 }
471 wchan = get_wchan(*p);
472 for(i=0; i<32; ++i) {
473 switch((unsigned long) (*p)->sigaction[i].sa_handler) {
474 case 1: sigignore |= bit; break;
475 case 0: break;
476 default: sigcatch |= bit;
477 } bit <<= 1;
478 }
479 if ((*p)->tty)
480 tty_pgrp = (*p)->tty->pgrp;
481 else
482 tty_pgrp = -1;
483 return sprintf(buffer,"%d (%s) %c %d %d %d %d %d %lu %lu \
484 %lu %lu %lu %ld %ld %ld %ld %ld %ld %lu %lu %ld %lu %lu %lu %lu %lu %lu %lu %lu %lu \
485 %lu %lu %lu %lu\n",
486 pid,
487 (*p)->comm,
488 state,
489 (*p)->p_pptr->pid,
490 (*p)->pgrp,
491 (*p)->session,
492 (*p)->tty ? (*p)->tty->device : 0,
493 tty_pgrp,
494 (*p)->flags,
495 (*p)->mm->min_flt,
496 (*p)->mm->cmin_flt,
497 (*p)->mm->maj_flt,
498 (*p)->mm->cmaj_flt,
499 (*p)->utime,
500 (*p)->stime,
501 (*p)->cutime,
502 (*p)->cstime,
503 (*p)->counter,
504
505 (*p)->priority,
506
507 (*p)->timeout,
508 (*p)->it_real_value,
509 (*p)->start_time,
510 vsize,
511 (*p)->mm->rss,
512 (*p)->rlim[RLIMIT_RSS].rlim_cur,
513 (*p)->mm->start_code,
514 (*p)->mm->end_code,
515 (*p)->mm->start_stack,
516 esp,
517 eip,
518 (*p)->signal,
519 (*p)->blocked,
520 sigignore,
521 sigcatch,
522 wchan);
523 }
524
525 static inline void statm_pte_range(pmd_t * pmd, unsigned long address, unsigned long size,
526 int * pages, int * shared, int * dirty, int * total)
527 {
528 pte_t * pte;
529 unsigned long end;
530
531 if (pmd_none(*pmd))
532 return;
533 if (pmd_bad(*pmd)) {
534 printk("statm_pte_range: bad pmd (%08lx)\n", pmd_val(*pmd));
535 pmd_clear(pmd);
536 return;
537 }
538 pte = pte_offset(pmd, address);
539 address &= ~PMD_MASK;
540 end = address + size;
541 if (end > PMD_SIZE)
542 end = PMD_SIZE;
543 do {
544 pte_t page = *pte;
545
546 address += PAGE_SIZE;
547 pte++;
548 if (pte_none(page))
549 continue;
550 ++*total;
551 if (!pte_present(page))
552 continue;
553 ++*pages;
554 if (pte_dirty(page))
555 ++*dirty;
556 if (pte_page(page) >= high_memory)
557 continue;
558 if (mem_map[MAP_NR(pte_page(page))] > 1)
559 ++*shared;
560 } while (address < end);
561 }
562
563 static inline void statm_pmd_range(pgd_t * pgd, unsigned long address, unsigned long size,
564 int * pages, int * shared, int * dirty, int * total)
565 {
566 pmd_t * pmd;
567 unsigned long end;
568
569 if (pgd_none(*pgd))
570 return;
571 if (pgd_bad(*pgd)) {
572 printk("statm_pmd_range: bad pgd (%08lx)\n", pgd_val(*pgd));
573 pgd_clear(pgd);
574 return;
575 }
576 pmd = pmd_offset(pgd, address);
577 address &= ~PGDIR_MASK;
578 end = address + size;
579 if (end > PGDIR_SIZE)
580 end = PGDIR_SIZE;
581 do {
582 statm_pte_range(pmd, address, end - address, pages, shared, dirty, total);
583 address = (address + PMD_SIZE) & PMD_MASK;
584 pmd++;
585 } while (address < end);
586 }
587
588 static void statm_pgd_range(pgd_t * pgd, unsigned long address, unsigned long end,
589 int * pages, int * shared, int * dirty, int * total)
590 {
591 while (address < end) {
592 statm_pmd_range(pgd, address, end - address, pages, shared, dirty, total);
593 address = (address + PGDIR_SIZE) & PGDIR_MASK;
594 pgd++;
595 }
596 }
597
598 static int get_statm(int pid, char * buffer)
599 {
600 struct task_struct ** p = get_task(pid);
601 int size=0, resident=0, share=0, trs=0, lrs=0, drs=0, dt=0;
602
603 if (!p || !*p)
604 return 0;
605 if ((*p)->state != TASK_ZOMBIE) {
606 struct vm_area_struct * vma = (*p)->mm->mmap;
607
608 while (vma) {
609 pgd_t *pgd = pgd_offset(*p, vma->vm_start);
610 int pages = 0, shared = 0, dirty = 0, total = 0;
611
612 statm_pgd_range(pgd, vma->vm_start, vma->vm_end, &pages, &shared, &dirty, &total);
613 resident += pages;
614 share += shared;
615 dt += dirty;
616 size += total;
617 if (vma->vm_flags & VM_EXECUTABLE)
618 trs += pages;
619 else if (vma->vm_flags & VM_GROWSDOWN)
620 drs += pages;
621 else if (vma->vm_end > 0x60000000)
622 lrs += pages;
623 else
624 drs += pages;
625 vma = vma->vm_next;
626 }
627 }
628 return sprintf(buffer,"%d %d %d %d %d %d %d\n",
629 size, resident, share, trs, lrs, drs, dt);
630 }
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648 #define MAPS_LINE_LENGTH 1024
649 #define MAPS_LINE_SHIFT 10
650
651
652
653
654 #define MAPS_LINE_FORMAT "%08lx-%08lx %s %08lx %02x:%02x %lu\n"
655 #define MAPS_LINE_MAX 49
656
657 static int read_maps (int pid, struct file * file, char * buf, int count)
658 {
659 struct task_struct ** p = get_task(pid);
660 char * destptr;
661 loff_t lineno;
662 int column;
663 struct vm_area_struct * map;
664 int i;
665
666 if (!p || !*p)
667 return -EINVAL;
668
669 if (count == 0)
670 return 0;
671
672
673 lineno = file->f_pos >> MAPS_LINE_SHIFT;
674 column = file->f_pos & (MAPS_LINE_LENGTH-1);
675
676
677 for (map = (*p)->mm->mmap, i = 0; map && (i < lineno); map = map->vm_next, i++)
678 continue;
679
680 destptr = buf;
681
682 for ( ; map ; ) {
683
684 char line[MAPS_LINE_MAX+1];
685 char str[5], *cp = str;
686 int flags;
687 dev_t dev;
688 unsigned long ino;
689 int len;
690
691 flags = map->vm_flags;
692
693 *cp++ = flags & VM_READ ? 'r' : '-';
694 *cp++ = flags & VM_WRITE ? 'w' : '-';
695 *cp++ = flags & VM_EXEC ? 'x' : '-';
696 *cp++ = flags & VM_MAYSHARE ? 's' : 'p';
697 *cp++ = 0;
698
699 if (map->vm_inode != NULL) {
700 dev = map->vm_inode->i_dev;
701 ino = map->vm_inode->i_ino;
702 } else {
703 dev = 0;
704 ino = 0;
705 }
706
707 len = sprintf(line, MAPS_LINE_FORMAT,
708 map->vm_start, map->vm_end, str, map->vm_offset,
709 MAJOR(dev),MINOR(dev), ino);
710
711 if (column >= len) {
712 column = 0;
713 lineno++;
714 map = map->vm_next;
715 continue;
716 }
717
718 i = len-column;
719 if (i > count)
720 i = count;
721 memcpy_tofs(destptr, line+column, i);
722 destptr += i; count -= i;
723 column += i;
724 if (column >= len) {
725 column = 0;
726 lineno++;
727 map = map->vm_next;
728 }
729
730
731 if (count == 0)
732 break;
733
734
735
736
737 if (*p != current)
738 break;
739 }
740
741
742 file->f_pos = (lineno << MAPS_LINE_SHIFT) + column;
743
744 return destptr-buf;
745 }
746
747 extern int get_module_list(char *);
748 extern int get_device_list(char *);
749 extern int get_filesystem_list(char *);
750 extern int get_ksyms_list(char *);
751 extern int get_irq_list(char *);
752 extern int get_dma_list(char *);
753 extern int get_cpuinfo(char *);
754 extern int get_pci_list(char*);
755
756 static int get_root_array(char * page, int type)
757 {
758 switch (type) {
759 case PROC_LOADAVG:
760 return get_loadavg(page);
761
762 case PROC_UPTIME:
763 return get_uptime(page);
764
765 case PROC_MEMINFO:
766 return get_meminfo(page);
767
768 #ifdef CONFIG_PCI
769 case PROC_PCI:
770 return get_pci_list(page);
771 #endif
772
773 case PROC_CPUINFO:
774 return get_cpuinfo(page);
775
776 case PROC_VERSION:
777 return get_version(page);
778
779 #ifdef CONFIG_DEBUG_MALLOC
780 case PROC_MALLOC:
781 return get_malloc(page);
782 #endif
783
784 case PROC_MODULES:
785 return get_module_list(page);
786
787 case PROC_STAT:
788 return get_kstat(page);
789
790 case PROC_DEVICES:
791 return get_device_list(page);
792
793 case PROC_INTERRUPTS:
794 return get_irq_list(page);
795
796 case PROC_FILESYSTEMS:
797 return get_filesystem_list(page);
798
799 case PROC_KSYMS:
800 return get_ksyms_list(page);
801
802 case PROC_DMA:
803 return get_dma_list(page);
804
805 case PROC_IOPORTS:
806 return get_ioport_list(page);
807 }
808 return -EBADF;
809 }
810
811 static int get_process_array(char * page, int pid, int type)
812 {
813 switch (type) {
814 case PROC_PID_ENVIRON:
815 return get_env(pid, page);
816 case PROC_PID_CMDLINE:
817 return get_arg(pid, page);
818 case PROC_PID_STAT:
819 return get_stat(pid, page);
820 case PROC_PID_STATM:
821 return get_statm(pid, page);
822 }
823 return -EBADF;
824 }
825
826
827 static inline int fill_array(char * page, int pid, int type)
828 {
829 if (pid)
830 return get_process_array(page, pid, type);
831 return get_root_array(page, type);
832 }
833
834 static int array_read(struct inode * inode, struct file * file,char * buf, int count)
835 {
836 unsigned long page;
837 int length;
838 int end;
839 unsigned int type, pid;
840
841 if (count < 0)
842 return -EINVAL;
843 if (!(page = __get_free_page(GFP_KERNEL)))
844 return -ENOMEM;
845 type = inode->i_ino;
846 pid = type >> 16;
847 type &= 0x0000ffff;
848 length = fill_array((char *) page, pid, type);
849 if (length < 0) {
850 free_page(page);
851 return length;
852 }
853 if (file->f_pos >= length) {
854 free_page(page);
855 return 0;
856 }
857 if (count + file->f_pos > length)
858 count = length - file->f_pos;
859 end = count + file->f_pos;
860 memcpy_tofs(buf, (char *) page + file->f_pos, count);
861 free_page(page);
862 file->f_pos = end;
863 return count;
864 }
865
866 static struct file_operations proc_array_operations = {
867 NULL,
868 array_read,
869 NULL,
870 NULL,
871 NULL,
872 NULL,
873 NULL,
874 NULL,
875 NULL,
876 NULL
877 };
878
879 struct inode_operations proc_array_inode_operations = {
880 &proc_array_operations,
881 NULL,
882 NULL,
883 NULL,
884 NULL,
885 NULL,
886 NULL,
887 NULL,
888 NULL,
889 NULL,
890 NULL,
891 NULL,
892 NULL,
893 NULL,
894 NULL
895 };
896
897 static int arraylong_read (struct inode * inode, struct file * file, char * buf, int count)
898 {
899 unsigned int pid = inode->i_ino >> 16;
900 unsigned int type = inode->i_ino & 0x0000ffff;
901
902 if (count < 0)
903 return -EINVAL;
904
905 switch (type) {
906 case PROC_PID_MAPS:
907 return read_maps(pid, file, buf, count);
908 }
909 return -EINVAL;
910 }
911
912 static struct file_operations proc_arraylong_operations = {
913 NULL,
914 arraylong_read,
915 NULL,
916 NULL,
917 NULL,
918 NULL,
919 NULL,
920 NULL,
921 NULL,
922 NULL
923 };
924
925 struct inode_operations proc_arraylong_inode_operations = {
926 &proc_arraylong_operations,
927 NULL,
928 NULL,
929 NULL,
930 NULL,
931 NULL,
932 NULL,
933 NULL,
934 NULL,
935 NULL,
936 NULL,
937 NULL,
938 NULL,
939 NULL,
940 NULL
941 };