linux-imx

/*

   md.c : Multiple Devices driver for Linux

     Copyright (C) 1998, 1999, 2000 Ingo Molnar

​

     completely rewritten, based on the MD driver code from Marc Zyngier

​

   Changes:

​

   - RAID-1/RAID-5 extensions by Miguel de Icaza, Gadi Oxman, Ingo Molnar

   - RAID-6 extensions by H. Peter Anvin <hpa@zytor.com>

   - boot support for linear and striped mode by Harald Hoyer <HarryH@Royal.Net>

   - kerneld support by Boris Tobotras <boris@xtalk.msk.su>

   - kmod support by: Cyrus Durgin

   - RAID0 bugfixes: Mark Anthony Lisher <markal@iname.com>

   - Devfs support by Richard Gooch <rgooch@atnf.csiro.au>

​

   - lots of fixes and improvements to the RAID1/RAID5 and generic

     RAID code (such as request based resynchronization):

​

     Neil Brown <neilb@cse.unsw.edu.au>.

​

   - persistent bitmap code

     Copyright (C) 2003-2004, Paul Clements, SteelEye Technology, Inc.

​

   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, or (at your option)

   any later version.

​

   You should have received a copy of the GNU General Public License

   (for example /usr/src/linux/COPYING); if not, write to the Free

   Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

​

   Errors, Warnings, etc.

   Please use:

     pr_crit() for error conditions that risk data loss

     pr_err() for error conditions that are unexpected, like an IO error

         or internal inconsistency

     pr_warn() for error conditions that could have been predicated, like

         adding a device to an array when it has incompatible metadata

     pr_info() for every interesting, very rare events, like an array starting

         or stopping, or resync starting or stopping

     pr_debug() for everything else.

​

*/

​

#include <linux/sched/signal.h>

#include <linux/kthread.h>

#include <linux/blkdev.h>

#include <linux/badblocks.h>

#include <linux/sysctl.h>

#include <linux/seq_file.h>

#include <linux/fs.h>

#include <linux/poll.h>

#include <linux/ctype.h>

#include <linux/string.h>

#include <linux/hdreg.h>

#include <linux/proc_fs.h>

#include <linux/random.h>

#include <linux/module.h>

#include <linux/reboot.h>

#include <linux/file.h>

#include <linux/compat.h>

#include <linux/delay.h>

#include <linux/raid/md_p.h>

#include <linux/raid/md_u.h>

#include <linux/slab.h>

#include <linux/percpu-refcount.h>

​

#include <trace/events/block.h>

#include "md.h"

#include "md-bitmap.h"

#include "md-cluster.h"

​

#ifndef MODULE

static void autostart_arrays(int part);

#endif

​

/* pers_list is a list of registered personalities protected

 * by pers_lock.

 * pers_lock does extra service to protect accesses to

 * mddev->thread when the mutex cannot be held.

 */

static LIST_HEAD(pers_list);

static DEFINE_SPINLOCK(pers_lock);

​

static struct kobj_type md_ktype;

​

struct md_cluster_operations *md_cluster_ops;

EXPORT_SYMBOL(md_cluster_ops);

struct module *md_cluster_mod;

EXPORT_SYMBOL(md_cluster_mod);