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