2 * linux/fs/proc/proc_misc.c
4 * linux/fs/proc/array.c
5 * Copyright (C) 1992 by Linus Torvalds
6 * based on ideas by Darren Senn
8 * This used to be the part of array.c. See the rest of history and credits
9 * there. I took this into a separate file and switched the thing to generic
10 * proc_file_inode_operations, leaving in array.c only per-process stuff.
11 * Inumbers allocation made dynamic (via create_proc_entry()). AV, May 1999.
14 * Fulton Green : Encapsulated position metric calculations.
15 * <kernel@FultonGreen.com>
18 #include <linux/types.h>
19 #include <linux/errno.h>
20 #include <linux/time.h>
21 #include <linux/kernel.h>
22 #include <linux/kernel_stat.h>
24 #include <linux/tty.h>
25 #include <linux/string.h>
26 #include <linux/mman.h>
27 #include <linux/proc_fs.h>
28 #include <linux/ioport.h>
30 #include <linux/mmzone.h>
31 #include <linux/pagemap.h>
32 #include <linux/interrupt.h>
33 #include <linux/swap.h>
34 #include <linux/slab.h>
35 #include <linux/smp.h>
36 #include <linux/signal.h>
37 #include <linux/module.h>
38 #include <linux/init.h>
39 #include <linux/seq_file.h>
40 #include <linux/times.h>
41 #include <linux/profile.h>
42 #include <linux/utsname.h>
43 #include <linux/blkdev.h>
44 #include <linux/hugetlb.h>
45 #include <linux/jiffies.h>
46 #include <linux/sysrq.h>
47 #include <linux/vmalloc.h>
48 #include <linux/crash_dump.h>
49 #include <linux/pid_namespace.h>
50 #include <linux/bootmem.h>
51 #include <asm/uaccess.h>
52 #include <asm/pgtable.h>
55 #include <asm/div64.h>
58 #define LOAD_INT(x) ((x) >> FSHIFT)
59 #define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100)
61 * Warning: stuff below (imported functions) assumes that its output will fit
62 * into one page. For some of those functions it may be wrong. Moreover, we
63 * have a way to deal with that gracefully. Right now I used straightforward
64 * wrappers, but this needs further analysis wrt potential overflows.
66 extern int get_hardware_list(char *);
67 extern int get_stram_list(char *);
68 extern int get_filesystem_list(char *);
69 extern int get_exec_domain_list(char *);
70 extern int get_dma_list(char *);
72 static int proc_calc_metrics(char *page, char **start, off_t off,
73 int count, int *eof, int len)
75 if (len <= off+count) *eof = 1;
78 if (len>count) len = count;
83 static int loadavg_read_proc(char *page, char **start, off_t off,
84 int count, int *eof, void *data)
89 a = avenrun[0] + (FIXED_1/200);
90 b = avenrun[1] + (FIXED_1/200);
91 c = avenrun[2] + (FIXED_1/200);
92 len = sprintf(page,"%d.%02d %d.%02d %d.%02d %ld/%d %d\n",
93 LOAD_INT(a), LOAD_FRAC(a),
94 LOAD_INT(b), LOAD_FRAC(b),
95 LOAD_INT(c), LOAD_FRAC(c),
96 nr_running(), nr_threads,
97 task_active_pid_ns(current)->last_pid);
98 return proc_calc_metrics(page, start, off, count, eof, len);
101 static int uptime_read_proc(char *page, char **start, off_t off,
102 int count, int *eof, void *data)
104 struct timespec uptime;
105 struct timespec idle;
107 cputime_t idletime = cputime_add(init_task.utime, init_task.stime);
109 do_posix_clock_monotonic_gettime(&uptime);
110 monotonic_to_bootbased(&uptime);
111 cputime_to_timespec(idletime, &idle);
112 len = sprintf(page,"%lu.%02lu %lu.%02lu\n",
113 (unsigned long) uptime.tv_sec,
114 (uptime.tv_nsec / (NSEC_PER_SEC / 100)),
115 (unsigned long) idle.tv_sec,
116 (idle.tv_nsec / (NSEC_PER_SEC / 100)));
118 return proc_calc_metrics(page, start, off, count, eof, len);
121 static int meminfo_read_proc(char *page, char **start, off_t off,
122 int count, int *eof, void *data)
126 unsigned long committed;
127 unsigned long allowed;
128 struct vmalloc_info vmi;
132 * display in kilobytes.
134 #define K(x) ((x) << (PAGE_SHIFT - 10))
137 committed = atomic_read(&vm_committed_space);
138 allowed = ((totalram_pages - hugetlb_total_pages())
139 * sysctl_overcommit_ratio / 100) + total_swap_pages;
141 cached = global_page_state(NR_FILE_PAGES) -
142 total_swapcache_pages - i.bufferram;
146 get_vmalloc_info(&vmi);
149 * Tagged format, for easy grepping and expansion.
152 "MemTotal: %8lu kB\n"
156 "SwapCached: %8lu kB\n"
158 "Inactive: %8lu kB\n"
159 #ifdef CONFIG_HIGHMEM
160 "HighTotal: %8lu kB\n"
161 "HighFree: %8lu kB\n"
162 "LowTotal: %8lu kB\n"
165 "SwapTotal: %8lu kB\n"
166 "SwapFree: %8lu kB\n"
168 "Writeback: %8lu kB\n"
169 "AnonPages: %8lu kB\n"
172 "SReclaimable: %8lu kB\n"
173 "SUnreclaim: %8lu kB\n"
174 "PageTables: %8lu kB\n"
175 "NFS_Unstable: %8lu kB\n"
177 "CommitLimit: %8lu kB\n"
178 "Committed_AS: %8lu kB\n"
179 "VmallocTotal: %8lu kB\n"
180 "VmallocUsed: %8lu kB\n"
181 "VmallocChunk: %8lu kB\n",
186 K(total_swapcache_pages),
187 K(global_page_state(NR_ACTIVE)),
188 K(global_page_state(NR_INACTIVE)),
189 #ifdef CONFIG_HIGHMEM
192 K(i.totalram-i.totalhigh),
193 K(i.freeram-i.freehigh),
197 K(global_page_state(NR_FILE_DIRTY)),
198 K(global_page_state(NR_WRITEBACK)),
199 K(global_page_state(NR_ANON_PAGES)),
200 K(global_page_state(NR_FILE_MAPPED)),
201 K(global_page_state(NR_SLAB_RECLAIMABLE) +
202 global_page_state(NR_SLAB_UNRECLAIMABLE)),
203 K(global_page_state(NR_SLAB_RECLAIMABLE)),
204 K(global_page_state(NR_SLAB_UNRECLAIMABLE)),
205 K(global_page_state(NR_PAGETABLE)),
206 K(global_page_state(NR_UNSTABLE_NFS)),
207 K(global_page_state(NR_BOUNCE)),
210 (unsigned long)VMALLOC_TOTAL >> 10,
212 vmi.largest_chunk >> 10
215 len += hugetlb_report_meminfo(page + len);
217 return proc_calc_metrics(page, start, off, count, eof, len);
221 extern struct seq_operations fragmentation_op;
222 static int fragmentation_open(struct inode *inode, struct file *file)
225 return seq_open(file, &fragmentation_op);
228 static const struct file_operations fragmentation_file_operations = {
229 .open = fragmentation_open,
232 .release = seq_release,
235 extern struct seq_operations pagetypeinfo_op;
236 static int pagetypeinfo_open(struct inode *inode, struct file *file)
238 return seq_open(file, &pagetypeinfo_op);
241 static const struct file_operations pagetypeinfo_file_ops = {
242 .open = pagetypeinfo_open,
245 .release = seq_release,
248 extern struct seq_operations zoneinfo_op;
249 static int zoneinfo_open(struct inode *inode, struct file *file)
251 return seq_open(file, &zoneinfo_op);
254 static const struct file_operations proc_zoneinfo_file_operations = {
255 .open = zoneinfo_open,
258 .release = seq_release,
261 static int version_read_proc(char *page, char **start, off_t off,
262 int count, int *eof, void *data)
266 len = snprintf(page, PAGE_SIZE, linux_proc_banner,
270 return proc_calc_metrics(page, start, off, count, eof, len);
273 extern struct seq_operations cpuinfo_op;
274 static int cpuinfo_open(struct inode *inode, struct file *file)
276 return seq_open(file, &cpuinfo_op);
279 static const struct file_operations proc_cpuinfo_operations = {
280 .open = cpuinfo_open,
283 .release = seq_release,
286 static int devinfo_show(struct seq_file *f, void *v)
288 int i = *(loff_t *) v;
290 if (i < CHRDEV_MAJOR_HASH_SIZE) {
292 seq_printf(f, "Character devices:\n");
297 i -= CHRDEV_MAJOR_HASH_SIZE;
299 seq_printf(f, "\nBlock devices:\n");
306 static void *devinfo_start(struct seq_file *f, loff_t *pos)
308 if (*pos < (BLKDEV_MAJOR_HASH_SIZE + CHRDEV_MAJOR_HASH_SIZE))
313 static void *devinfo_next(struct seq_file *f, void *v, loff_t *pos)
316 if (*pos >= (BLKDEV_MAJOR_HASH_SIZE + CHRDEV_MAJOR_HASH_SIZE))
321 static void devinfo_stop(struct seq_file *f, void *v)
326 static struct seq_operations devinfo_ops = {
327 .start = devinfo_start,
328 .next = devinfo_next,
329 .stop = devinfo_stop,
333 static int devinfo_open(struct inode *inode, struct file *filp)
335 return seq_open(filp, &devinfo_ops);
338 static const struct file_operations proc_devinfo_operations = {
339 .open = devinfo_open,
342 .release = seq_release,
345 extern struct seq_operations vmstat_op;
346 static int vmstat_open(struct inode *inode, struct file *file)
348 return seq_open(file, &vmstat_op);
350 static const struct file_operations proc_vmstat_file_operations = {
354 .release = seq_release,
357 #ifdef CONFIG_PROC_HARDWARE
358 static int hardware_read_proc(char *page, char **start, off_t off,
359 int count, int *eof, void *data)
361 int len = get_hardware_list(page);
362 return proc_calc_metrics(page, start, off, count, eof, len);
366 #ifdef CONFIG_STRAM_PROC
367 static int stram_read_proc(char *page, char **start, off_t off,
368 int count, int *eof, void *data)
370 int len = get_stram_list(page);
371 return proc_calc_metrics(page, start, off, count, eof, len);
376 extern struct seq_operations partitions_op;
377 static int partitions_open(struct inode *inode, struct file *file)
379 return seq_open(file, &partitions_op);
381 static const struct file_operations proc_partitions_operations = {
382 .open = partitions_open,
385 .release = seq_release,
388 extern struct seq_operations diskstats_op;
389 static int diskstats_open(struct inode *inode, struct file *file)
391 return seq_open(file, &diskstats_op);
393 static const struct file_operations proc_diskstats_operations = {
394 .open = diskstats_open,
397 .release = seq_release,
401 #ifdef CONFIG_MODULES
402 extern struct seq_operations modules_op;
403 static int modules_open(struct inode *inode, struct file *file)
405 return seq_open(file, &modules_op);
407 static const struct file_operations proc_modules_operations = {
408 .open = modules_open,
411 .release = seq_release,
415 #ifdef CONFIG_SLABINFO
416 static int slabinfo_open(struct inode *inode, struct file *file)
418 return seq_open(file, &slabinfo_op);
420 static const struct file_operations proc_slabinfo_operations = {
421 .open = slabinfo_open,
423 .write = slabinfo_write,
425 .release = seq_release,
428 #ifdef CONFIG_DEBUG_SLAB_LEAK
429 extern struct seq_operations slabstats_op;
430 static int slabstats_open(struct inode *inode, struct file *file)
432 unsigned long *n = kzalloc(PAGE_SIZE, GFP_KERNEL);
435 ret = seq_open(file, &slabstats_op);
437 struct seq_file *m = file->private_data;
438 *n = PAGE_SIZE / (2 * sizeof(unsigned long));
447 static const struct file_operations proc_slabstats_operations = {
448 .open = slabstats_open,
451 .release = seq_release_private,
456 static int show_stat(struct seq_file *p, void *v)
460 cputime64_t user, nice, system, idle, iowait, irq, softirq, steal;
463 struct timespec boottime;
464 unsigned int *per_irq_sum;
466 per_irq_sum = kzalloc(sizeof(unsigned int)*NR_IRQS, GFP_KERNEL);
470 user = nice = system = idle = iowait =
471 irq = softirq = steal = cputime64_zero;
472 guest = cputime64_zero;
473 getboottime(&boottime);
474 jif = boottime.tv_sec;
476 for_each_possible_cpu(i) {
479 user = cputime64_add(user, kstat_cpu(i).cpustat.user);
480 nice = cputime64_add(nice, kstat_cpu(i).cpustat.nice);
481 system = cputime64_add(system, kstat_cpu(i).cpustat.system);
482 idle = cputime64_add(idle, kstat_cpu(i).cpustat.idle);
483 iowait = cputime64_add(iowait, kstat_cpu(i).cpustat.iowait);
484 irq = cputime64_add(irq, kstat_cpu(i).cpustat.irq);
485 softirq = cputime64_add(softirq, kstat_cpu(i).cpustat.softirq);
486 steal = cputime64_add(steal, kstat_cpu(i).cpustat.steal);
487 guest = cputime64_add(guest, kstat_cpu(i).cpustat.guest);
488 for (j = 0; j < NR_IRQS; j++) {
489 unsigned int temp = kstat_cpu(i).irqs[j];
491 per_irq_sum[j] += temp;
495 seq_printf(p, "cpu %llu %llu %llu %llu %llu %llu %llu %llu %llu\n",
496 (unsigned long long)cputime64_to_clock_t(user),
497 (unsigned long long)cputime64_to_clock_t(nice),
498 (unsigned long long)cputime64_to_clock_t(system),
499 (unsigned long long)cputime64_to_clock_t(idle),
500 (unsigned long long)cputime64_to_clock_t(iowait),
501 (unsigned long long)cputime64_to_clock_t(irq),
502 (unsigned long long)cputime64_to_clock_t(softirq),
503 (unsigned long long)cputime64_to_clock_t(steal),
504 (unsigned long long)cputime64_to_clock_t(guest));
505 for_each_online_cpu(i) {
507 /* Copy values here to work around gcc-2.95.3, gcc-2.96 */
508 user = kstat_cpu(i).cpustat.user;
509 nice = kstat_cpu(i).cpustat.nice;
510 system = kstat_cpu(i).cpustat.system;
511 idle = kstat_cpu(i).cpustat.idle;
512 iowait = kstat_cpu(i).cpustat.iowait;
513 irq = kstat_cpu(i).cpustat.irq;
514 softirq = kstat_cpu(i).cpustat.softirq;
515 steal = kstat_cpu(i).cpustat.steal;
516 guest = kstat_cpu(i).cpustat.guest;
518 "cpu%d %llu %llu %llu %llu %llu %llu %llu %llu %llu\n",
520 (unsigned long long)cputime64_to_clock_t(user),
521 (unsigned long long)cputime64_to_clock_t(nice),
522 (unsigned long long)cputime64_to_clock_t(system),
523 (unsigned long long)cputime64_to_clock_t(idle),
524 (unsigned long long)cputime64_to_clock_t(iowait),
525 (unsigned long long)cputime64_to_clock_t(irq),
526 (unsigned long long)cputime64_to_clock_t(softirq),
527 (unsigned long long)cputime64_to_clock_t(steal),
528 (unsigned long long)cputime64_to_clock_t(guest));
530 seq_printf(p, "intr %llu", (unsigned long long)sum);
532 for (i = 0; i < NR_IRQS; i++)
533 seq_printf(p, " %u", per_irq_sum[i]);
539 "procs_running %lu\n"
540 "procs_blocked %lu\n",
541 nr_context_switches(),
551 static int stat_open(struct inode *inode, struct file *file)
553 unsigned size = 4096 * (1 + num_possible_cpus() / 32);
558 /* don't ask for more than the kmalloc() max size, currently 128 KB */
559 if (size > 128 * 1024)
561 buf = kmalloc(size, GFP_KERNEL);
565 res = single_open(file, show_stat, NULL);
567 m = file->private_data;
574 static const struct file_operations proc_stat_operations = {
578 .release = single_release,
584 static void *int_seq_start(struct seq_file *f, loff_t *pos)
586 return (*pos <= NR_IRQS) ? pos : NULL;
589 static void *int_seq_next(struct seq_file *f, void *v, loff_t *pos)
597 static void int_seq_stop(struct seq_file *f, void *v)
603 static struct seq_operations int_seq_ops = {
604 .start = int_seq_start,
605 .next = int_seq_next,
606 .stop = int_seq_stop,
607 .show = show_interrupts
610 static int interrupts_open(struct inode *inode, struct file *filp)
612 return seq_open(filp, &int_seq_ops);
615 static const struct file_operations proc_interrupts_operations = {
616 .open = interrupts_open,
619 .release = seq_release,
622 static int filesystems_read_proc(char *page, char **start, off_t off,
623 int count, int *eof, void *data)
625 int len = get_filesystem_list(page);
626 return proc_calc_metrics(page, start, off, count, eof, len);
629 static int cmdline_read_proc(char *page, char **start, off_t off,
630 int count, int *eof, void *data)
634 len = sprintf(page, "%s\n", saved_command_line);
635 return proc_calc_metrics(page, start, off, count, eof, len);
638 static int locks_open(struct inode *inode, struct file *filp)
640 return seq_open(filp, &locks_seq_operations);
643 static const struct file_operations proc_locks_operations = {
647 .release = seq_release,
650 static int execdomains_read_proc(char *page, char **start, off_t off,
651 int count, int *eof, void *data)
653 int len = get_exec_domain_list(page);
654 return proc_calc_metrics(page, start, off, count, eof, len);
657 #ifdef CONFIG_MAGIC_SYSRQ
659 * writing 'C' to /proc/sysrq-trigger is like sysrq-C
661 static ssize_t write_sysrq_trigger(struct file *file, const char __user *buf,
662 size_t count, loff_t *ppos)
667 if (get_user(c, buf))
669 __handle_sysrq(c, NULL, 0);
674 static const struct file_operations proc_sysrq_trigger_operations = {
675 .write = write_sysrq_trigger,
679 #ifdef CONFIG_PROC_PAGE_MONITOR
680 #define KPMSIZE sizeof(u64)
681 #define KPMMASK (KPMSIZE - 1)
682 /* /proc/kpagecount - an array exposing page counts
684 * Each entry is a u64 representing the corresponding
685 * physical page count.
687 static ssize_t kpagecount_read(struct file *file, char __user *buf,
688 size_t count, loff_t *ppos)
690 u64 __user *out = (u64 __user *)buf;
692 unsigned long src = *ppos;
698 count = min_t(size_t, count, (max_pfn * KPMSIZE) - src);
699 if (src & KPMMASK || count & KPMMASK)
705 ppage = pfn_to_page(pfn);
710 pcount = atomic_read(&ppage->_count);
712 if (put_user(pcount, out++)) {
720 *ppos += (char __user *)out - buf;
722 ret = (char __user *)out - buf;
726 static struct file_operations proc_kpagecount_operations = {
728 .read = kpagecount_read,
731 /* /proc/kpageflags - an array exposing page flags
733 * Each entry is a u64 representing the corresponding
734 * physical page flags.
737 /* These macros are used to decouple internal flags from exported ones */
741 #define KPF_REFERENCED 2
742 #define KPF_UPTODATE 3
747 #define KPF_WRITEBACK 8
748 #define KPF_RECLAIM 9
751 #define kpf_copy_bit(flags, srcpos, dstpos) (((flags >> srcpos) & 1) << dstpos)
753 static ssize_t kpageflags_read(struct file *file, char __user *buf,
754 size_t count, loff_t *ppos)
756 u64 __user *out = (u64 __user *)buf;
758 unsigned long src = *ppos;
764 count = min_t(unsigned long, count, (max_pfn * KPMSIZE) - src);
765 if (src & KPMMASK || count & KPMMASK)
771 ppage = pfn_to_page(pfn);
776 kflags = ppage->flags;
778 uflags = kpf_copy_bit(KPF_LOCKED, PG_locked, kflags) |
779 kpf_copy_bit(kflags, KPF_ERROR, PG_error) |
780 kpf_copy_bit(kflags, KPF_REFERENCED, PG_referenced) |
781 kpf_copy_bit(kflags, KPF_UPTODATE, PG_uptodate) |
782 kpf_copy_bit(kflags, KPF_DIRTY, PG_dirty) |
783 kpf_copy_bit(kflags, KPF_LRU, PG_lru) |
784 kpf_copy_bit(kflags, KPF_ACTIVE, PG_active) |
785 kpf_copy_bit(kflags, KPF_SLAB, PG_slab) |
786 kpf_copy_bit(kflags, KPF_WRITEBACK, PG_writeback) |
787 kpf_copy_bit(kflags, KPF_RECLAIM, PG_reclaim) |
788 kpf_copy_bit(kflags, KPF_BUDDY, PG_buddy);
790 if (put_user(uflags, out++)) {
798 *ppos += (char __user *)out - buf;
800 ret = (char __user *)out - buf;
804 static struct file_operations proc_kpageflags_operations = {
806 .read = kpageflags_read,
808 #endif /* CONFIG_PROC_PAGE_MONITOR */
810 struct proc_dir_entry *proc_root_kcore;
812 void create_seq_entry(char *name, mode_t mode, const struct file_operations *f)
814 struct proc_dir_entry *entry;
815 entry = create_proc_entry(name, mode, NULL);
817 entry->proc_fops = f;
820 void __init proc_misc_init(void)
824 int (*read_proc)(char*,char**,off_t,int,int*,void*);
825 } *p, simple_ones[] = {
826 {"loadavg", loadavg_read_proc},
827 {"uptime", uptime_read_proc},
828 {"meminfo", meminfo_read_proc},
829 {"version", version_read_proc},
830 #ifdef CONFIG_PROC_HARDWARE
831 {"hardware", hardware_read_proc},
833 #ifdef CONFIG_STRAM_PROC
834 {"stram", stram_read_proc},
836 {"filesystems", filesystems_read_proc},
837 {"cmdline", cmdline_read_proc},
838 {"execdomains", execdomains_read_proc},
841 for (p = simple_ones; p->name; p++)
842 create_proc_read_entry(p->name, 0, NULL, p->read_proc, NULL);
844 proc_symlink("mounts", NULL, "self/mounts");
846 /* And now for trickier ones */
849 struct proc_dir_entry *entry;
850 entry = create_proc_entry("kmsg", S_IRUSR, &proc_root);
852 entry->proc_fops = &proc_kmsg_operations;
855 create_seq_entry("locks", 0, &proc_locks_operations);
856 create_seq_entry("devices", 0, &proc_devinfo_operations);
857 create_seq_entry("cpuinfo", 0, &proc_cpuinfo_operations);
859 create_seq_entry("partitions", 0, &proc_partitions_operations);
861 create_seq_entry("stat", 0, &proc_stat_operations);
862 create_seq_entry("interrupts", 0, &proc_interrupts_operations);
863 #ifdef CONFIG_SLABINFO
864 create_seq_entry("slabinfo",S_IWUSR|S_IRUGO,&proc_slabinfo_operations);
865 #ifdef CONFIG_DEBUG_SLAB_LEAK
866 create_seq_entry("slab_allocators", 0 ,&proc_slabstats_operations);
869 create_seq_entry("buddyinfo",S_IRUGO, &fragmentation_file_operations);
870 create_seq_entry("pagetypeinfo", S_IRUGO, &pagetypeinfo_file_ops);
871 create_seq_entry("vmstat",S_IRUGO, &proc_vmstat_file_operations);
872 create_seq_entry("zoneinfo",S_IRUGO, &proc_zoneinfo_file_operations);
874 create_seq_entry("diskstats", 0, &proc_diskstats_operations);
876 #ifdef CONFIG_MODULES
877 create_seq_entry("modules", 0, &proc_modules_operations);
879 #ifdef CONFIG_SCHEDSTATS
880 create_seq_entry("schedstat", 0, &proc_schedstat_operations);
882 #ifdef CONFIG_PROC_KCORE
883 proc_root_kcore = create_proc_entry("kcore", S_IRUSR, NULL);
884 if (proc_root_kcore) {
885 proc_root_kcore->proc_fops = &proc_kcore_operations;
886 proc_root_kcore->size =
887 (size_t)high_memory - PAGE_OFFSET + PAGE_SIZE;
890 #ifdef CONFIG_PROC_PAGE_MONITOR
891 create_seq_entry("kpagecount", S_IRUSR, &proc_kpagecount_operations);
892 create_seq_entry("kpageflags", S_IRUSR, &proc_kpageflags_operations);
894 #ifdef CONFIG_PROC_VMCORE
895 proc_vmcore = create_proc_entry("vmcore", S_IRUSR, NULL);
897 proc_vmcore->proc_fops = &proc_vmcore_operations;
899 #ifdef CONFIG_MAGIC_SYSRQ
901 struct proc_dir_entry *entry;
902 entry = create_proc_entry("sysrq-trigger", S_IWUSR, NULL);
904 entry->proc_fops = &proc_sysrq_trigger_operations;