Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S936372AbWLDMlP (ORCPT ); Mon, 4 Dec 2006 07:41:15 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S936334AbWLDMfT (ORCPT ); Mon, 4 Dec 2006 07:35:19 -0500 Received: from filer.fsl.cs.sunysb.edu ([130.245.126.2]:62942 "EHLO filer.fsl.cs.sunysb.edu") by vger.kernel.org with ESMTP id S936294AbWLDMfM (ORCPT ); Mon, 4 Dec 2006 07:35:12 -0500 From: "Josef 'Jeff' Sipek" To: linux-kernel@vger.kernel.org Cc: torvalds@osdl.org, akpm@osdl.org, hch@infradead.org, viro@ftp.linux.org.uk, linux-fsdevel@vger.kernel.org, mhalcrow@us.ibm.com, Josef "Jeff" Sipek Subject: [PATCH 26/35] Unionfs: Privileged operations workqueue Date: Mon, 4 Dec 2006 07:30:59 -0500 Message-Id: <1165235471170-git-send-email-jsipek@cs.sunysb.edu> X-Mailer: git-send-email 1.4.3.3 In-Reply-To: <1165235468365-git-send-email-jsipek@cs.sunysb.edu> References: <1165235468365-git-send-email-jsipek@cs.sunysb.edu> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5471 Lines: 227 From: Josef "Jeff" Sipek Workqueue & helper functions used to perform privileged operations on behalf of the user process. Signed-off-by: Josef "Jeff" Sipek Signed-off-by: David Quigley Signed-off-by: Erez Zadok --- fs/unionfs/sioq.c | 115 +++++++++++++++++++++++++++++++++++++++++++++++++++++ fs/unionfs/sioq.h | 79 ++++++++++++++++++++++++++++++++++++ 2 files changed, 194 insertions(+), 0 deletions(-) diff --git a/fs/unionfs/sioq.c b/fs/unionfs/sioq.c new file mode 100644 index 0000000..187ad87 --- /dev/null +++ b/fs/unionfs/sioq.c @@ -0,0 +1,115 @@ +/* + * Copyright (c) 2003-2006 Erez Zadok + * Copyright (c) 2003-2006 Charles P. Wright + * Copyright (c) 2005-2006 Josef 'Jeff' Sipek + * Copyright (c) 2005-2006 Junjiro Okajima + * Copyright (c) 2005 Arun M. Krishnakumar + * Copyright (c) 2004-2006 David P. Quigley + * Copyright (c) 2003-2004 Mohammad Nayyer Zubair + * Copyright (c) 2003 Puja Gupta + * Copyright (c) 2003 Harikesavan Krishnan + * Copyright (c) 2003-2006 Stony Brook University + * Copyright (c) 2003-2006 The Research Foundation of State University of New York + * + * 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" + +struct workqueue_struct *sioq; + +int __init init_sioq(void) +{ + int err; + + sioq = create_workqueue("unionfs_siod"); + if (!IS_ERR(sioq)) + return 0; + + err = PTR_ERR(sioq); + printk(KERN_ERR "create_workqueue failed %d\n", err); + sioq = NULL; + return err; +} + +void fin_sioq(void) +{ + if (sioq) + destroy_workqueue(sioq); +} + +void run_sioq(void (*func)(void *arg), struct sioq_args *args) +{ + DECLARE_WORK(wk, func, &args->comp); + + init_completion(&args->comp); + while (!queue_work(sioq, &wk)) { + /* TODO: do accounting if needed */ + schedule(); + } + wait_for_completion(&args->comp); +} + +void __unionfs_create(void *data) +{ + struct sioq_args *args = data; + struct create_args *c = &args->create; + + args->err = vfs_create(c->parent, c->dentry, c->mode, c->nd); + complete(&args->comp); +} + +void __unionfs_mkdir(void *data) +{ + struct sioq_args *args = data; + struct mkdir_args *m = &args->mkdir; + + args->err = vfs_mkdir(m->parent, m->dentry, m->mode); + complete(&args->comp); +} + +void __unionfs_mknod(void *data) +{ + struct sioq_args *args = data; + struct mknod_args *m = &args->mknod; + + args->err = vfs_mknod(m->parent, m->dentry, m->mode, m->dev); + complete(&args->comp); +} +void __unionfs_symlink(void *data) +{ + struct sioq_args *args = data; + struct symlink_args *s = &args->symlink; + + args->err = vfs_symlink(s->parent, s->dentry, s->symbuf, s->mode); + complete(&args->comp); +} + +void __unionfs_unlink(void *data) +{ + struct sioq_args *args = data; + struct unlink_args *u = &args->unlink; + + args->err = vfs_unlink(u->parent, u->dentry); + complete(&args->comp); +} + +void __delete_whiteouts(void *data) { + struct sioq_args *args = data; + struct deletewh_args *d = &args->deletewh; + + args->err = do_delete_whiteouts(d->dentry, d->bindex, d->namelist); + complete(&args->comp); +} + +void __is_opaque_dir(void *data) +{ + struct sioq_args *args = data; + + args->ret = lookup_one_len(UNIONFS_DIR_OPAQUE, args->isopaque.dentry, + sizeof(UNIONFS_DIR_OPAQUE) - 1); + complete(&args->comp); +} + diff --git a/fs/unionfs/sioq.h b/fs/unionfs/sioq.h new file mode 100644 index 0000000..628d214 --- /dev/null +++ b/fs/unionfs/sioq.h @@ -0,0 +1,79 @@ +#ifndef _SIOQ_H +#define _SIOQ_H + +struct deletewh_args { + struct unionfs_dir_state *namelist; + struct dentry *dentry; + int bindex; +}; + +struct isopaque_args { + struct dentry *dentry; +}; + +struct create_args { + struct inode *parent; + struct dentry *dentry; + umode_t mode; + struct nameidata *nd; +}; + +struct mkdir_args { + struct inode *parent; + struct dentry *dentry; + umode_t mode; +}; + +struct mknod_args { + struct inode *parent; + struct dentry *dentry; + umode_t mode; + dev_t dev; +}; + +struct symlink_args { + struct inode *parent; + struct dentry *dentry; + char *symbuf; + umode_t mode; +}; + +struct unlink_args { + struct inode *parent; + struct dentry *dentry; +}; + + +struct sioq_args { + + struct completion comp; + int err; + void *ret; + + union { + struct deletewh_args deletewh; + struct isopaque_args isopaque; + struct create_args create; + struct mkdir_args mkdir; + struct mknod_args mknod; + struct symlink_args symlink; + struct unlink_args unlink; + }; +}; + +extern struct workqueue_struct *sioq; +int __init init_sioq(void); +extern void fin_sioq(void); +extern void run_sioq(void (*func)(void *arg), struct sioq_args *args); + +/* Extern definitions for our privledge escalation helpers */ +extern void __unionfs_create(void *data); +extern void __unionfs_mkdir(void *data); +extern void __unionfs_mknod(void *data); +extern void __unionfs_symlink(void *data); +extern void __unionfs_unlink(void *data); +extern void __delete_whiteouts(void *data); +extern void __is_opaque_dir(void *data); + +#endif /* _SIOQ_H */ + -- 1.4.3.3 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/