cregit-Linux how code gets into the kernel

Release 4.17 fs/proc/nommu.c

Directory: fs/proc
/* nommu.c: mmu-less memory info files
 *
 * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
 * Written by David Howells (dhowells@redhat.com)
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 */

#include <linux/init.h>
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/time.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/mman.h>
#include <linux/proc_fs.h>
#include <linux/mm.h>
#include <linux/mmzone.h>
#include <linux/pagemap.h>
#include <linux/swap.h>
#include <linux/smp.h>
#include <linux/seq_file.h>
#include <linux/hugetlb.h>
#include <linux/vmalloc.h>
#include <linux/uaccess.h>
#include <asm/pgtable.h>
#include <asm/tlb.h>
#include <asm/div64.h>
#include "internal.h"

/*
 * display a single region to a sequenced file
 */

static int nommu_region_show(struct seq_file *m, struct vm_region *region) { unsigned long ino = 0; struct file *file; dev_t dev = 0; int flags; flags = region->vm_flags; file = region->vm_file; if (file) { struct inode *inode = file_inode(region->vm_file); dev = inode->i_sb->s_dev; ino = inode->i_ino; } seq_setwidth(m, 25 + sizeof(void *) * 6 - 1); seq_printf(m, "%08lx-%08lx %c%c%c%c %08llx %02x:%02x %lu ", region->vm_start, region->vm_end, flags & VM_READ ? 'r' : '-', flags & VM_WRITE ? 'w' : '-', flags & VM_EXEC ? 'x' : '-', flags & VM_MAYSHARE ? flags & VM_SHARED ? 'S' : 's' : 'p', ((loff_t)region->vm_pgoff) << PAGE_SHIFT, MAJOR(dev), MINOR(dev), ino); if (file) { seq_pad(m, ' '); seq_file_path(m, file, ""); } seq_putc(m, '\n'); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
David Howells17686.27%450.00%
Tetsuo Handa199.31%112.50%
Clément Calmels52.45%112.50%
Al Viro31.47%112.50%
Miklos Szeredi10.49%112.50%
Total204100.00%8100.00%

/* * display a list of all the REGIONs the kernel knows about * - nommu kernels have a single flat list */
static int nommu_region_list_show(struct seq_file *m, void *_p) { struct rb_node *p = _p; return nommu_region_show(m, rb_entry(p, struct vm_region, vm_rb)); }

Contributors

PersonTokensPropCommitsCommitProp
David Howells38100.00%2100.00%
Total38100.00%2100.00%


static void *nommu_region_list_start(struct seq_file *m, loff_t *_pos) { struct rb_node *p; loff_t pos = *_pos; down_read(&nommu_region_sem); for (p = rb_first(&nommu_region_tree); p; p = rb_next(p)) if (pos-- == 0) return p; return NULL; }

Contributors

PersonTokensPropCommitsCommitProp
David Howells65100.00%3100.00%
Total65100.00%3100.00%


static void nommu_region_list_stop(struct seq_file *m, void *v) { up_read(&nommu_region_sem); }

Contributors

PersonTokensPropCommitsCommitProp
David Howells21100.00%2100.00%
Total21100.00%2100.00%


static void *nommu_region_list_next(struct seq_file *m, void *v, loff_t *pos) { (*pos)++; return rb_next((struct rb_node *) v); }

Contributors

PersonTokensPropCommitsCommitProp
David Howells37100.00%3100.00%
Total37100.00%3100.00%

static const struct seq_operations proc_nommu_region_list_seqop = { .start = nommu_region_list_start, .next = nommu_region_list_next, .stop = nommu_region_list_stop, .show = nommu_region_list_show };
static int proc_nommu_region_list_open(struct inode *inode, struct file *file) { return seq_open(file, &proc_nommu_region_list_seqop); }

Contributors

PersonTokensPropCommitsCommitProp
David Howells25100.00%2100.00%
Total25100.00%2100.00%

static const struct file_operations proc_nommu_region_list_operations = { .open = proc_nommu_region_list_open, .read = seq_read, .llseek = seq_lseek, .release = seq_release, };
static int __init proc_nommu_init(void) { proc_create("maps", S_IRUGO, NULL, &proc_nommu_region_list_operations); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
David Howells2187.50%266.67%
Alexey Dobriyan312.50%133.33%
Total24100.00%3100.00%

fs_initcall(proc_nommu_init);

Overall Contributors

PersonTokensPropCommitsCommitProp
David Howells50593.35%533.33%
Tetsuo Handa193.51%16.67%
Clément Calmels50.92%16.67%
Al Viro30.55%16.67%
Alexey Dobriyan30.55%16.67%
Paul Gortmaker10.18%16.67%
Uwe Kleine-König10.18%16.67%
Linus Torvalds10.18%16.67%
Miklos Szeredi10.18%16.67%
Arjan van de Ven10.18%16.67%
James Morris10.18%16.67%
Total541100.00%15100.00%
Directory: fs/proc
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