mirror of https://gitee.com/openkylin/linux.git
741 lines
19 KiB
C
741 lines
19 KiB
C
/*
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* linux/fs/proc/proc_misc.c
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*
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* linux/fs/proc/array.c
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* Copyright (C) 1992 by Linus Torvalds
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* based on ideas by Darren Senn
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*
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* This used to be the part of array.c. See the rest of history and credits
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* there. I took this into a separate file and switched the thing to generic
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* proc_file_inode_operations, leaving in array.c only per-process stuff.
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* Inumbers allocation made dynamic (via create_proc_entry()). AV, May 1999.
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*
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* Changes:
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* Fulton Green : Encapsulated position metric calculations.
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* <kernel@FultonGreen.com>
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*/
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#include <linux/types.h>
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#include <linux/errno.h>
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#include <linux/time.h>
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#include <linux/kernel.h>
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#include <linux/kernel_stat.h>
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#include <linux/fs.h>
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#include <linux/tty.h>
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#include <linux/string.h>
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#include <linux/mman.h>
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#include <linux/proc_fs.h>
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#include <linux/ioport.h>
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#include <linux/mm.h>
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#include <linux/mmzone.h>
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#include <linux/pagemap.h>
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#include <linux/swap.h>
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#include <linux/slab.h>
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#include <linux/smp.h>
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#include <linux/signal.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/seq_file.h>
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#include <linux/times.h>
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#include <linux/profile.h>
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#include <linux/utsname.h>
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#include <linux/blkdev.h>
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#include <linux/hugetlb.h>
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#include <linux/jiffies.h>
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#include <linux/sysrq.h>
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#include <linux/vmalloc.h>
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#include <linux/crash_dump.h>
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#include <linux/pid_namespace.h>
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#include <asm/uaccess.h>
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#include <asm/pgtable.h>
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#include <asm/io.h>
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#include <asm/tlb.h>
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#include <asm/div64.h>
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#include "internal.h"
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#define LOAD_INT(x) ((x) >> FSHIFT)
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#define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100)
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/*
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* Warning: stuff below (imported functions) assumes that its output will fit
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* into one page. For some of those functions it may be wrong. Moreover, we
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* have a way to deal with that gracefully. Right now I used straightforward
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* wrappers, but this needs further analysis wrt potential overflows.
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*/
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extern int get_hardware_list(char *);
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extern int get_stram_list(char *);
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extern int get_filesystem_list(char *);
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extern int get_exec_domain_list(char *);
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extern int get_dma_list(char *);
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extern int get_locks_status (char *, char **, off_t, int);
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static int proc_calc_metrics(char *page, char **start, off_t off,
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int count, int *eof, int len)
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{
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if (len <= off+count) *eof = 1;
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*start = page + off;
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len -= off;
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if (len>count) len = count;
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if (len<0) len = 0;
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return len;
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}
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static int loadavg_read_proc(char *page, char **start, off_t off,
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int count, int *eof, void *data)
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{
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int a, b, c;
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int len;
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a = avenrun[0] + (FIXED_1/200);
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b = avenrun[1] + (FIXED_1/200);
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c = avenrun[2] + (FIXED_1/200);
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len = sprintf(page,"%d.%02d %d.%02d %d.%02d %ld/%d %d\n",
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LOAD_INT(a), LOAD_FRAC(a),
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LOAD_INT(b), LOAD_FRAC(b),
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LOAD_INT(c), LOAD_FRAC(c),
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nr_running(), nr_threads, current->nsproxy->pid_ns->last_pid);
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return proc_calc_metrics(page, start, off, count, eof, len);
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}
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static int uptime_read_proc(char *page, char **start, off_t off,
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int count, int *eof, void *data)
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{
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struct timespec uptime;
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struct timespec idle;
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int len;
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cputime_t idletime = cputime_add(init_task.utime, init_task.stime);
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do_posix_clock_monotonic_gettime(&uptime);
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cputime_to_timespec(idletime, &idle);
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len = sprintf(page,"%lu.%02lu %lu.%02lu\n",
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(unsigned long) uptime.tv_sec,
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(uptime.tv_nsec / (NSEC_PER_SEC / 100)),
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(unsigned long) idle.tv_sec,
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(idle.tv_nsec / (NSEC_PER_SEC / 100)));
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return proc_calc_metrics(page, start, off, count, eof, len);
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}
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static int meminfo_read_proc(char *page, char **start, off_t off,
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int count, int *eof, void *data)
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{
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struct sysinfo i;
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int len;
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unsigned long committed;
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unsigned long allowed;
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struct vmalloc_info vmi;
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long cached;
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/*
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* display in kilobytes.
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*/
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#define K(x) ((x) << (PAGE_SHIFT - 10))
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si_meminfo(&i);
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si_swapinfo(&i);
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committed = atomic_read(&vm_committed_space);
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allowed = ((totalram_pages - hugetlb_total_pages())
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* sysctl_overcommit_ratio / 100) + total_swap_pages;
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cached = global_page_state(NR_FILE_PAGES) -
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total_swapcache_pages - i.bufferram;
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if (cached < 0)
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cached = 0;
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get_vmalloc_info(&vmi);
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/*
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* Tagged format, for easy grepping and expansion.
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*/
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len = sprintf(page,
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"MemTotal: %8lu kB\n"
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"MemFree: %8lu kB\n"
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"Buffers: %8lu kB\n"
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"Cached: %8lu kB\n"
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"SwapCached: %8lu kB\n"
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"Active: %8lu kB\n"
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"Inactive: %8lu kB\n"
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#ifdef CONFIG_HIGHMEM
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"HighTotal: %8lu kB\n"
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"HighFree: %8lu kB\n"
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"LowTotal: %8lu kB\n"
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"LowFree: %8lu kB\n"
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#endif
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"SwapTotal: %8lu kB\n"
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"SwapFree: %8lu kB\n"
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"Dirty: %8lu kB\n"
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"Writeback: %8lu kB\n"
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"AnonPages: %8lu kB\n"
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"Mapped: %8lu kB\n"
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"Slab: %8lu kB\n"
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"SReclaimable: %8lu kB\n"
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"SUnreclaim: %8lu kB\n"
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"PageTables: %8lu kB\n"
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"NFS_Unstable: %8lu kB\n"
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"Bounce: %8lu kB\n"
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"CommitLimit: %8lu kB\n"
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"Committed_AS: %8lu kB\n"
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"VmallocTotal: %8lu kB\n"
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"VmallocUsed: %8lu kB\n"
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"VmallocChunk: %8lu kB\n",
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K(i.totalram),
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K(i.freeram),
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K(i.bufferram),
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K(cached),
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K(total_swapcache_pages),
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K(global_page_state(NR_ACTIVE)),
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K(global_page_state(NR_INACTIVE)),
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#ifdef CONFIG_HIGHMEM
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K(i.totalhigh),
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K(i.freehigh),
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K(i.totalram-i.totalhigh),
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K(i.freeram-i.freehigh),
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#endif
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K(i.totalswap),
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K(i.freeswap),
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K(global_page_state(NR_FILE_DIRTY)),
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K(global_page_state(NR_WRITEBACK)),
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K(global_page_state(NR_ANON_PAGES)),
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K(global_page_state(NR_FILE_MAPPED)),
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K(global_page_state(NR_SLAB_RECLAIMABLE) +
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global_page_state(NR_SLAB_UNRECLAIMABLE)),
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K(global_page_state(NR_SLAB_RECLAIMABLE)),
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K(global_page_state(NR_SLAB_UNRECLAIMABLE)),
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K(global_page_state(NR_PAGETABLE)),
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K(global_page_state(NR_UNSTABLE_NFS)),
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K(global_page_state(NR_BOUNCE)),
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K(allowed),
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K(committed),
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(unsigned long)VMALLOC_TOTAL >> 10,
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vmi.used >> 10,
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vmi.largest_chunk >> 10
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);
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len += hugetlb_report_meminfo(page + len);
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return proc_calc_metrics(page, start, off, count, eof, len);
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#undef K
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}
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extern struct seq_operations fragmentation_op;
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static int fragmentation_open(struct inode *inode, struct file *file)
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{
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(void)inode;
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return seq_open(file, &fragmentation_op);
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}
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static const struct file_operations fragmentation_file_operations = {
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.open = fragmentation_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = seq_release,
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};
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extern struct seq_operations zoneinfo_op;
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static int zoneinfo_open(struct inode *inode, struct file *file)
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{
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return seq_open(file, &zoneinfo_op);
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}
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static const struct file_operations proc_zoneinfo_file_operations = {
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.open = zoneinfo_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = seq_release,
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};
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static int version_read_proc(char *page, char **start, off_t off,
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int count, int *eof, void *data)
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{
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int len;
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len = snprintf(page, PAGE_SIZE, linux_proc_banner,
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utsname()->sysname,
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utsname()->release,
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utsname()->version);
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return proc_calc_metrics(page, start, off, count, eof, len);
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}
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extern struct seq_operations cpuinfo_op;
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static int cpuinfo_open(struct inode *inode, struct file *file)
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{
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return seq_open(file, &cpuinfo_op);
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}
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static const struct file_operations proc_cpuinfo_operations = {
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.open = cpuinfo_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = seq_release,
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};
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static int devinfo_show(struct seq_file *f, void *v)
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{
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int i = *(loff_t *) v;
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if (i < CHRDEV_MAJOR_HASH_SIZE) {
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if (i == 0)
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seq_printf(f, "Character devices:\n");
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chrdev_show(f, i);
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}
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#ifdef CONFIG_BLOCK
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else {
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i -= CHRDEV_MAJOR_HASH_SIZE;
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if (i == 0)
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seq_printf(f, "\nBlock devices:\n");
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blkdev_show(f, i);
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}
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#endif
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return 0;
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}
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static void *devinfo_start(struct seq_file *f, loff_t *pos)
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{
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if (*pos < (BLKDEV_MAJOR_HASH_SIZE + CHRDEV_MAJOR_HASH_SIZE))
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return pos;
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return NULL;
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}
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static void *devinfo_next(struct seq_file *f, void *v, loff_t *pos)
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{
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(*pos)++;
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if (*pos >= (BLKDEV_MAJOR_HASH_SIZE + CHRDEV_MAJOR_HASH_SIZE))
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return NULL;
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return pos;
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}
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static void devinfo_stop(struct seq_file *f, void *v)
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{
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/* Nothing to do */
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}
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static struct seq_operations devinfo_ops = {
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.start = devinfo_start,
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.next = devinfo_next,
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.stop = devinfo_stop,
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.show = devinfo_show
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};
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static int devinfo_open(struct inode *inode, struct file *filp)
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{
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return seq_open(filp, &devinfo_ops);
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}
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static const struct file_operations proc_devinfo_operations = {
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.open = devinfo_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = seq_release,
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};
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extern struct seq_operations vmstat_op;
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static int vmstat_open(struct inode *inode, struct file *file)
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{
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return seq_open(file, &vmstat_op);
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}
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static const struct file_operations proc_vmstat_file_operations = {
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.open = vmstat_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = seq_release,
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};
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#ifdef CONFIG_PROC_HARDWARE
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static int hardware_read_proc(char *page, char **start, off_t off,
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int count, int *eof, void *data)
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{
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int len = get_hardware_list(page);
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return proc_calc_metrics(page, start, off, count, eof, len);
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}
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#endif
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#ifdef CONFIG_STRAM_PROC
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static int stram_read_proc(char *page, char **start, off_t off,
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int count, int *eof, void *data)
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{
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int len = get_stram_list(page);
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return proc_calc_metrics(page, start, off, count, eof, len);
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}
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#endif
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#ifdef CONFIG_BLOCK
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extern struct seq_operations partitions_op;
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static int partitions_open(struct inode *inode, struct file *file)
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{
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return seq_open(file, &partitions_op);
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}
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static const struct file_operations proc_partitions_operations = {
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.open = partitions_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = seq_release,
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};
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extern struct seq_operations diskstats_op;
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static int diskstats_open(struct inode *inode, struct file *file)
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{
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return seq_open(file, &diskstats_op);
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}
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static const struct file_operations proc_diskstats_operations = {
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.open = diskstats_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = seq_release,
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};
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#endif
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#ifdef CONFIG_MODULES
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extern struct seq_operations modules_op;
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static int modules_open(struct inode *inode, struct file *file)
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{
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return seq_open(file, &modules_op);
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}
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static const struct file_operations proc_modules_operations = {
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.open = modules_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = seq_release,
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};
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#endif
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#ifdef CONFIG_SLAB
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static int slabinfo_open(struct inode *inode, struct file *file)
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{
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return seq_open(file, &slabinfo_op);
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}
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static const struct file_operations proc_slabinfo_operations = {
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.open = slabinfo_open,
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.read = seq_read,
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.write = slabinfo_write,
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.llseek = seq_lseek,
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.release = seq_release,
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};
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#ifdef CONFIG_DEBUG_SLAB_LEAK
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extern struct seq_operations slabstats_op;
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static int slabstats_open(struct inode *inode, struct file *file)
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{
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unsigned long *n = kzalloc(PAGE_SIZE, GFP_KERNEL);
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int ret = -ENOMEM;
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if (n) {
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ret = seq_open(file, &slabstats_op);
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if (!ret) {
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struct seq_file *m = file->private_data;
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*n = PAGE_SIZE / (2 * sizeof(unsigned long));
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m->private = n;
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n = NULL;
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}
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kfree(n);
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}
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return ret;
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}
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static const struct file_operations proc_slabstats_operations = {
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.open = slabstats_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = seq_release_private,
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};
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#endif
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#endif
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static int show_stat(struct seq_file *p, void *v)
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{
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int i;
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unsigned long jif;
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cputime64_t user, nice, system, idle, iowait, irq, softirq, steal;
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u64 sum = 0;
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user = nice = system = idle = iowait =
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irq = softirq = steal = cputime64_zero;
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jif = - wall_to_monotonic.tv_sec;
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if (wall_to_monotonic.tv_nsec)
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--jif;
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for_each_possible_cpu(i) {
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int j;
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user = cputime64_add(user, kstat_cpu(i).cpustat.user);
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nice = cputime64_add(nice, kstat_cpu(i).cpustat.nice);
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system = cputime64_add(system, kstat_cpu(i).cpustat.system);
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idle = cputime64_add(idle, kstat_cpu(i).cpustat.idle);
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iowait = cputime64_add(iowait, kstat_cpu(i).cpustat.iowait);
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irq = cputime64_add(irq, kstat_cpu(i).cpustat.irq);
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softirq = cputime64_add(softirq, kstat_cpu(i).cpustat.softirq);
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steal = cputime64_add(steal, kstat_cpu(i).cpustat.steal);
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for (j = 0 ; j < NR_IRQS ; j++)
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sum += kstat_cpu(i).irqs[j];
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}
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seq_printf(p, "cpu %llu %llu %llu %llu %llu %llu %llu %llu\n",
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(unsigned long long)cputime64_to_clock_t(user),
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(unsigned long long)cputime64_to_clock_t(nice),
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(unsigned long long)cputime64_to_clock_t(system),
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(unsigned long long)cputime64_to_clock_t(idle),
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(unsigned long long)cputime64_to_clock_t(iowait),
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(unsigned long long)cputime64_to_clock_t(irq),
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(unsigned long long)cputime64_to_clock_t(softirq),
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(unsigned long long)cputime64_to_clock_t(steal));
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for_each_online_cpu(i) {
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/* Copy values here to work around gcc-2.95.3, gcc-2.96 */
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user = kstat_cpu(i).cpustat.user;
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nice = kstat_cpu(i).cpustat.nice;
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system = kstat_cpu(i).cpustat.system;
|
|
idle = kstat_cpu(i).cpustat.idle;
|
|
iowait = kstat_cpu(i).cpustat.iowait;
|
|
irq = kstat_cpu(i).cpustat.irq;
|
|
softirq = kstat_cpu(i).cpustat.softirq;
|
|
steal = kstat_cpu(i).cpustat.steal;
|
|
seq_printf(p, "cpu%d %llu %llu %llu %llu %llu %llu %llu %llu\n",
|
|
i,
|
|
(unsigned long long)cputime64_to_clock_t(user),
|
|
(unsigned long long)cputime64_to_clock_t(nice),
|
|
(unsigned long long)cputime64_to_clock_t(system),
|
|
(unsigned long long)cputime64_to_clock_t(idle),
|
|
(unsigned long long)cputime64_to_clock_t(iowait),
|
|
(unsigned long long)cputime64_to_clock_t(irq),
|
|
(unsigned long long)cputime64_to_clock_t(softirq),
|
|
(unsigned long long)cputime64_to_clock_t(steal));
|
|
}
|
|
seq_printf(p, "intr %llu", (unsigned long long)sum);
|
|
|
|
#if !defined(CONFIG_PPC64) && !defined(CONFIG_ALPHA) && !defined(CONFIG_IA64)
|
|
for (i = 0; i < NR_IRQS; i++)
|
|
seq_printf(p, " %u", kstat_irqs(i));
|
|
#endif
|
|
|
|
seq_printf(p,
|
|
"\nctxt %llu\n"
|
|
"btime %lu\n"
|
|
"processes %lu\n"
|
|
"procs_running %lu\n"
|
|
"procs_blocked %lu\n",
|
|
nr_context_switches(),
|
|
(unsigned long)jif,
|
|
total_forks,
|
|
nr_running(),
|
|
nr_iowait());
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int stat_open(struct inode *inode, struct file *file)
|
|
{
|
|
unsigned size = 4096 * (1 + num_possible_cpus() / 32);
|
|
char *buf;
|
|
struct seq_file *m;
|
|
int res;
|
|
|
|
/* don't ask for more than the kmalloc() max size, currently 128 KB */
|
|
if (size > 128 * 1024)
|
|
size = 128 * 1024;
|
|
buf = kmalloc(size, GFP_KERNEL);
|
|
if (!buf)
|
|
return -ENOMEM;
|
|
|
|
res = single_open(file, show_stat, NULL);
|
|
if (!res) {
|
|
m = file->private_data;
|
|
m->buf = buf;
|
|
m->size = size;
|
|
} else
|
|
kfree(buf);
|
|
return res;
|
|
}
|
|
static const struct file_operations proc_stat_operations = {
|
|
.open = stat_open,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.release = single_release,
|
|
};
|
|
|
|
/*
|
|
* /proc/interrupts
|
|
*/
|
|
static void *int_seq_start(struct seq_file *f, loff_t *pos)
|
|
{
|
|
return (*pos <= NR_IRQS) ? pos : NULL;
|
|
}
|
|
|
|
static void *int_seq_next(struct seq_file *f, void *v, loff_t *pos)
|
|
{
|
|
(*pos)++;
|
|
if (*pos > NR_IRQS)
|
|
return NULL;
|
|
return pos;
|
|
}
|
|
|
|
static void int_seq_stop(struct seq_file *f, void *v)
|
|
{
|
|
/* Nothing to do */
|
|
}
|
|
|
|
|
|
extern int show_interrupts(struct seq_file *f, void *v); /* In arch code */
|
|
static struct seq_operations int_seq_ops = {
|
|
.start = int_seq_start,
|
|
.next = int_seq_next,
|
|
.stop = int_seq_stop,
|
|
.show = show_interrupts
|
|
};
|
|
|
|
static int interrupts_open(struct inode *inode, struct file *filp)
|
|
{
|
|
return seq_open(filp, &int_seq_ops);
|
|
}
|
|
|
|
static const struct file_operations proc_interrupts_operations = {
|
|
.open = interrupts_open,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.release = seq_release,
|
|
};
|
|
|
|
static int filesystems_read_proc(char *page, char **start, off_t off,
|
|
int count, int *eof, void *data)
|
|
{
|
|
int len = get_filesystem_list(page);
|
|
return proc_calc_metrics(page, start, off, count, eof, len);
|
|
}
|
|
|
|
static int cmdline_read_proc(char *page, char **start, off_t off,
|
|
int count, int *eof, void *data)
|
|
{
|
|
int len;
|
|
|
|
len = sprintf(page, "%s\n", saved_command_line);
|
|
return proc_calc_metrics(page, start, off, count, eof, len);
|
|
}
|
|
|
|
static int locks_read_proc(char *page, char **start, off_t off,
|
|
int count, int *eof, void *data)
|
|
{
|
|
int len = get_locks_status(page, start, off, count);
|
|
|
|
if (len < count)
|
|
*eof = 1;
|
|
return len;
|
|
}
|
|
|
|
static int execdomains_read_proc(char *page, char **start, off_t off,
|
|
int count, int *eof, void *data)
|
|
{
|
|
int len = get_exec_domain_list(page);
|
|
return proc_calc_metrics(page, start, off, count, eof, len);
|
|
}
|
|
|
|
#ifdef CONFIG_MAGIC_SYSRQ
|
|
/*
|
|
* writing 'C' to /proc/sysrq-trigger is like sysrq-C
|
|
*/
|
|
static ssize_t write_sysrq_trigger(struct file *file, const char __user *buf,
|
|
size_t count, loff_t *ppos)
|
|
{
|
|
if (count) {
|
|
char c;
|
|
|
|
if (get_user(c, buf))
|
|
return -EFAULT;
|
|
__handle_sysrq(c, NULL, 0);
|
|
}
|
|
return count;
|
|
}
|
|
|
|
static const struct file_operations proc_sysrq_trigger_operations = {
|
|
.write = write_sysrq_trigger,
|
|
};
|
|
#endif
|
|
|
|
struct proc_dir_entry *proc_root_kcore;
|
|
|
|
void create_seq_entry(char *name, mode_t mode, const struct file_operations *f)
|
|
{
|
|
struct proc_dir_entry *entry;
|
|
entry = create_proc_entry(name, mode, NULL);
|
|
if (entry)
|
|
entry->proc_fops = f;
|
|
}
|
|
|
|
void __init proc_misc_init(void)
|
|
{
|
|
static struct {
|
|
char *name;
|
|
int (*read_proc)(char*,char**,off_t,int,int*,void*);
|
|
} *p, simple_ones[] = {
|
|
{"loadavg", loadavg_read_proc},
|
|
{"uptime", uptime_read_proc},
|
|
{"meminfo", meminfo_read_proc},
|
|
{"version", version_read_proc},
|
|
#ifdef CONFIG_PROC_HARDWARE
|
|
{"hardware", hardware_read_proc},
|
|
#endif
|
|
#ifdef CONFIG_STRAM_PROC
|
|
{"stram", stram_read_proc},
|
|
#endif
|
|
{"filesystems", filesystems_read_proc},
|
|
{"cmdline", cmdline_read_proc},
|
|
{"locks", locks_read_proc},
|
|
{"execdomains", execdomains_read_proc},
|
|
{NULL,}
|
|
};
|
|
for (p = simple_ones; p->name; p++)
|
|
create_proc_read_entry(p->name, 0, NULL, p->read_proc, NULL);
|
|
|
|
proc_symlink("mounts", NULL, "self/mounts");
|
|
|
|
/* And now for trickier ones */
|
|
#ifdef CONFIG_PRINTK
|
|
{
|
|
struct proc_dir_entry *entry;
|
|
entry = create_proc_entry("kmsg", S_IRUSR, &proc_root);
|
|
if (entry)
|
|
entry->proc_fops = &proc_kmsg_operations;
|
|
}
|
|
#endif
|
|
create_seq_entry("devices", 0, &proc_devinfo_operations);
|
|
create_seq_entry("cpuinfo", 0, &proc_cpuinfo_operations);
|
|
#ifdef CONFIG_BLOCK
|
|
create_seq_entry("partitions", 0, &proc_partitions_operations);
|
|
#endif
|
|
create_seq_entry("stat", 0, &proc_stat_operations);
|
|
create_seq_entry("interrupts", 0, &proc_interrupts_operations);
|
|
#ifdef CONFIG_SLAB
|
|
create_seq_entry("slabinfo",S_IWUSR|S_IRUGO,&proc_slabinfo_operations);
|
|
#ifdef CONFIG_DEBUG_SLAB_LEAK
|
|
create_seq_entry("slab_allocators", 0 ,&proc_slabstats_operations);
|
|
#endif
|
|
#endif
|
|
create_seq_entry("buddyinfo",S_IRUGO, &fragmentation_file_operations);
|
|
create_seq_entry("vmstat",S_IRUGO, &proc_vmstat_file_operations);
|
|
create_seq_entry("zoneinfo",S_IRUGO, &proc_zoneinfo_file_operations);
|
|
#ifdef CONFIG_BLOCK
|
|
create_seq_entry("diskstats", 0, &proc_diskstats_operations);
|
|
#endif
|
|
#ifdef CONFIG_MODULES
|
|
create_seq_entry("modules", 0, &proc_modules_operations);
|
|
#endif
|
|
#ifdef CONFIG_SCHEDSTATS
|
|
create_seq_entry("schedstat", 0, &proc_schedstat_operations);
|
|
#endif
|
|
#ifdef CONFIG_PROC_KCORE
|
|
proc_root_kcore = create_proc_entry("kcore", S_IRUSR, NULL);
|
|
if (proc_root_kcore) {
|
|
proc_root_kcore->proc_fops = &proc_kcore_operations;
|
|
proc_root_kcore->size =
|
|
(size_t)high_memory - PAGE_OFFSET + PAGE_SIZE;
|
|
}
|
|
#endif
|
|
#ifdef CONFIG_PROC_VMCORE
|
|
proc_vmcore = create_proc_entry("vmcore", S_IRUSR, NULL);
|
|
if (proc_vmcore)
|
|
proc_vmcore->proc_fops = &proc_vmcore_operations;
|
|
#endif
|
|
#ifdef CONFIG_MAGIC_SYSRQ
|
|
{
|
|
struct proc_dir_entry *entry;
|
|
entry = create_proc_entry("sysrq-trigger", S_IWUSR, NULL);
|
|
if (entry)
|
|
entry->proc_fops = &proc_sysrq_trigger_operations;
|
|
}
|
|
#endif
|
|
}
|