/* 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;
}

/*
 * 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));
}

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;
}

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

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

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);
}

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;
}

fs_initcall(proc_nommu_init);
<a href='/cgit.cgi/linux/net-next.git/log/net/sched?h=nds-private-remove&amp;id=d5bc1613d02f1c3f1226e2f7d555f0384d973482&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th><th class='left'>Files</th><th class='left'>Lines</th></tr>
<tr><td><span title='2017-02-14 15:02:17 -0500'>2017-02-14</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/net/sched?h=nds-private-remove&amp;id=6f2e3f7d9785dacb358b48b44950182b5c13e4bc'>net_sched: nla_memdup_cookie() can be static</a></td><td>Wei Yongjun</td><td>1</td><td><span class='deletions'>-1</span>/<span class='insertions'>+1</span></td></tr>
<tr><td><span title='2017-02-14 11:44:14 -0500'>2017-02-14</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/net/sched?h=nds-private-remove&amp;id=d7cf52c249d7aa797ea27808e1526604309ec142'>sched: Fix accidental removal of errout goto</a></td><td>Jiri Pirko</td><td>1</td><td><span class='deletions'>-0</span>/<span class='insertions'>+1</span></td></tr>
<tr><td><span title='2017-02-11 21:38:58 -0500'>2017-02-11</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/net/sched?h=nds-private-remove&amp;id=87b60cfacf9f17cf71933c6e33b66e68160af71d'>net_sched: fix error recovery at qdisc creation</a></td><td>Eric Dumazet</td><td>5</td><td><span class='deletions'>-23</span>/<span class='insertions'>+19</span></td></tr>
<tr><td><span title='2017-02-10 13:18:33 -0500'>2017-02-10</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/net/sched?h=nds-private-remove&amp;id=853a14ba4682f820266469979c9297debc05f60c'>net/act_pedit: Introduce 'add' operation</a></td><td>Amir Vadai</td><td>1</td><td><span class='deletions'>-4</span>/<span class='insertions'>+26</span></td></tr>
<tr><td><span title='2017-02-10 13:18:33 -0500'>2017-02-10</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/net/sched?h=nds-private-remove&amp;id=71d0ed7079dffbc5cd0941d77d9b84e04109c9bb'>net/act_pedit: Support using offset relative to the conventional network headers</a></td><td>Amir Vadai</td><td>1</td><td><span class='deletions'>-16</span>/<span class='insertions'>+180</span></td></tr>
<tr><td><span title='2017-02-10 11:38:09 -0500'>2017-02-10</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/net/sched?h=nds-private-remove&amp;id=40c81b25b16cd871afe70630c131bd2544848d1f'>sched: check negative err value to safe one level of indent</a></td><td>Jiri Pirko</td><td>1</td><td><span class='deletions'>-13</span>/<span class='insertions'>+9</span></td></tr>
<tr><td><span title='2017-02-10 11:38:09 -0500'>2017-02-10</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/net/sched?h=nds-private-remove&amp;id=7215032ced14f9943c8b72b61f4ac52902002158'>sched: add missing curly braces in else branch in tc_ctl_tfilter</a></td><td>Jiri Pirko</td><td>1</td><td><span class='deletions'>-1</span>/<span class='insertions'>+2</span></td></tr>
<tr><td><span title='2017-02-10 11:38:09 -0500'>2017-02-10</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/net/sched?h=nds-private-remove&amp;id=6bb16e7ae26095892e8c51de4142d8f344793340'>sched: move err set right before goto errout in tc_ctl_tfilter</a></td><td>Jiri Pirko</td><td>1</td><td><span class='deletions'>-10</span>/<span class='insertions'>+19</span></td></tr>
<tr><td><span title='2017-02-10 11:38:08 -0500'>2017-02-10</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/net/sched?h=nds-private-remove&amp;id=33a48927c193d030c80ecaeb3e021b7ed85f9c78'>sched: push TC filter protocol creation into a separate function</a></td><td>Jiri Pirko</td><td>1</td><td><span class='deletions'>-51</span>/<span class='insertions'>+59</span></td></tr>
<tr><td><span title='2017-02-10 11:38:08 -0500'>2017-02-10</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/net/sched?h=nds-private-remove&amp;id=cf1facda2f61bc3e9ffd985b6d624dec6ad3f279'>sched: move tcf_proto_destroy and tcf_destroy_chain helpers into cls_api</a></td><td>Jiri Pirko</td><td>13</td><td><span class='deletions'>-24</span>/<span class='insertions'>+32</span></td></tr>
<tr><td><span title='2017-02-10 11:38:08 -0500'>2017-02-10</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/net/sched?h=nds-private-remove&amp;id=79112c26f14c38ddbac3b2739469e373ef424fe6'>sched: rename tcf_destroy to tcf_destroy_proto</a></td><td>Jiri Pirko</td><td>2</td><td><span class='deletions'>-6</span>/<span class='insertions'>+6</span></td></tr>
<tr><td><span title='2017-02-07 11:42:34 -0500'>2017-02-07</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/net/sched?h=nds-private-remove&amp;id=89d82452d1fd283bb1e313bc7a1f7c324362cf02'>net/sched: act_mirred: remove duplicated include from act_mirred.c</a></td><td>Wei Yongjun</td><td>1</td><td><span class='deletions'>-2</span>/<span class='insertions'>+0</span></td></tr>
<tr><td><span title='2017-02-03 16:58:20 -0500'>2017-02-03</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/net/sched?h=nds-private-remove&amp;id=52e01b84a244473074fc0612c169e2e043d58b01'>Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next</a></td><td>David S. Miller</td><td>1</td><td><span class='deletions'>-1</span>/<span class='insertions'>+1</span></td></tr>
<tr><td><span title='2017-02-03 16:35:43 -0500'>2017-02-03</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/net/sched?h=nds-private-remove&amp;id=69ca05ce9dec2cc95070df7f1f10ea6c9c12d237'>sched: cls_flower: expose priority to offloading netdevice</a></td><td>Jiri Pirko</td><td>1</td><td><span class='deletions'>-0</span>/<span class='insertions'>+3</span></td></tr>
<tr><td><span title='2017-02-03 15:16:46 -0500'>2017-02-03</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/net/sched?h=nds-private-remove&amp;id=295a6e06d21e1f469c9f38b00125a13b60ad4e7c'>net/sched: act_ife: Change to use ife module</a></td><td>Yotam Gigi</td><td>2</td><td><span class='deletions'>-78</span>/<span class='insertions'>+33</span></td></tr>
<tr><td><span title='2017-02-03 15:16:45 -0500'>2017-02-03</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/net/sched?h=nds-private-remove&amp;id=1d5e7c859e81a66674d194c346119d154d31e9dc'>net/sched: act_ife: Unexport ife_tlv_meta_encode</a></td><td>Yotam Gigi</td><td>1</td><td><span class='deletions'>-2</span>/<span class='insertions'>+2</span></td></tr>
<tr><td><span title='2017-02-02 16:54:00 -0500'>2017-02-02</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/net/sched?h=nds-private-remove&amp;id=e2160156bf2a7d5018e99a9993fbcdda0abac09b'>Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net</a></td><td>David S. Miller</td><td>2</td><td><span class='deletions'>-85</span>/<span class='insertions'>+48</span></td></tr>
<tr><td><span title='2017-02-02 14:31:53 +0100'>2017-02-02</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/net/sched?h=nds-private-remove&amp;id=cb9c68363efb6d1f950ec55fb06e031ee70db5fc'>skbuff: add and use skb_nfct helper</a></td><td>Florian Westphal</td><td>1</td><td><span class='deletions'>-1</span>/<span class='insertions'>+1</span></td></tr>