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/*
* Copyright (c) 2006-2009 Erez Zadok
* Copyright (c) 2006 Charles P. Wright
* Copyright (c) 2006-2007 Josef 'Jeff' Sipek
* Copyright (c) 2006 Junjiro Okajima
* Copyright (c) 2006 David P. Quigley
* Copyright (c) 2006-2009 Stony Brook University
* Copyright (c) 2006-2009 The Research Foundation of SUNY
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include "union.h"
/*
* Super-user IO work Queue - sometimes we need to perform actions which
* would fail due to the unix permissions on the parent directory (e.g.,
* rmdir a directory which appears empty, but in reality contains
* whiteouts).
*/
static struct workqueue_struct *superio_workqueue;
int __init init_sioq(void)
{
int err;
superio_workqueue = create_workqueue("unionfs_siod");
if (!IS_ERR(superio_workqueue))
return 0;
err = PTR_ERR(superio_workqueue);
printk(KERN_ERR "unionfs: create_workqueue failed %d\n", err);
superio_workqueue = NULL;
return err;
}
void stop_sioq(void)
{
if (superio_workqueue)
destroy_workqueue(superio_workqueue);
}
void run_sioq(work_func_t func, struct sioq_args *args)
{
INIT_WORK(&args->work, func);
init_completion(&args->comp);
while (!queue_work(superio_workqueue, &args->work)) {
/* TODO: do accounting if needed */
schedule();
}
wait_for_completion(&args->comp);
}
void __unionfs_create(struct work_struct *work)
{
struct sioq_args *args = container_of(work, struct sioq_args, work);
struct create_args *c = &args->create;
args->err = vfs_create(c->parent, c->dentry, c->mode, c->nd);
complete(&args->comp);
}
void __unionfs_mkdir(struct work_struct *work)
{
struct sioq_args *args = container_of(work, struct sioq_args, work);
struct mkdir_args *m = &args->mkdir;
args->err = vfs_mkdir(m->parent, m->dentry, m->mode);
complete(&args->comp);
}
void __unionfs_mknod(struct work_struct *work)
{
struct sioq_args *args = container_of(work, struct sioq_args, work);
struct mknod_args *m = &args->mknod;
args->err = vfs_mknod(m->parent, m->dentry, m->mode, m->dev);
complete(&args->comp);
}
void __unionfs_symlink(struct work_struct *work)
{
struct sioq_args *args = container_of(work, struct sioq_args, work);
struct symlink_args *s = &args->symlink;
args->err = vfs_symlink(s->parent, s->dentry, s->symbuf);
complete(&args->comp);
}
void __unionfs_unlink(struct work_struct *work)
{
struct sioq_args *args = container_of(work, struct sioq_args, work);
struct unlink_args *u = &args->unlink;
args->err = vfs_unlink(u->parent, u->dentry);
complete(&args->comp);
}
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