MI kernel support for user-level Restartable Atomic Sequences (RAS).
This commit is contained in:
gmcgarry
parent
05980fc1da
commit
5bcbbd40bf
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@ -1,4 +1,4 @@
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/* $NetBSD: kern_exec.c,v 1.154 2002/08/26 21:07:39 christos Exp $ */
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/* $NetBSD: kern_exec.c,v 1.155 2002/08/28 07:16:35 gmcgarry Exp $ */
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/*-
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* Copyright (C) 1993, 1994, 1996 Christopher G. Demetriou
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@ -33,7 +33,7 @@
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: kern_exec.c,v 1.154 2002/08/26 21:07:39 christos Exp $");
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__KERNEL_RCSID(0, "$NetBSD: kern_exec.c,v 1.155 2002/08/28 07:16:35 gmcgarry Exp $");
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#include "opt_ktrace.h"
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#include "opt_syscall_debug.h"
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@ -54,6 +54,7 @@ __KERNEL_RCSID(0, "$NetBSD: kern_exec.c,v 1.154 2002/08/26 21:07:39 christos Exp
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#include <sys/resourcevar.h>
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#include <sys/wait.h>
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#include <sys/mman.h>
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#include <sys/ras.h>
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#include <sys/signalvar.h>
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#include <sys/stat.h>
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#include <sys/syscall.h>
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@ -649,6 +650,13 @@ sys_execve(struct proc *p, void *v, register_t *retval)
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p->p_cred->p_svuid = p->p_ucred->cr_uid;
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p->p_cred->p_svgid = p->p_ucred->cr_gid;
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#if defined(__HAVE_RAS)
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/*
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* Remove all RASs from the address space.
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*/
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ras_purgeall(p);
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#endif
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doexechooks(p);
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uvm_km_free_wakeup(exec_map, (vaddr_t) argp, NCARGS);
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@ -1,4 +1,4 @@
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/* $NetBSD: kern_exit.c,v 1.99 2002/08/13 05:42:27 manu Exp $ */
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/* $NetBSD: kern_exit.c,v 1.100 2002/08/28 07:16:36 gmcgarry Exp $ */
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/*-
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* Copyright (c) 1998, 1999 The NetBSD Foundation, Inc.
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@ -78,7 +78,7 @@
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: kern_exit.c,v 1.99 2002/08/13 05:42:27 manu Exp $");
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__KERNEL_RCSID(0, "$NetBSD: kern_exit.c,v 1.100 2002/08/28 07:16:36 gmcgarry Exp $");
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#include "opt_ktrace.h"
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#include "opt_perfctrs.h"
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@ -110,6 +110,7 @@ __KERNEL_RCSID(0, "$NetBSD: kern_exit.c,v 1.99 2002/08/13 05:42:27 manu Exp $");
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#include <sys/ptrace.h>
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#include <sys/acct.h>
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#include <sys/filedesc.h>
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#include <sys/ras.h>
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#include <sys/signalvar.h>
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#include <sys/sched.h>
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#include <sys/mount.h>
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@ -172,6 +173,10 @@ exit1(struct proc *p, int rv)
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p->p_sigctx.ps_sigcheck = 0;
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callout_stop(&p->p_realit_ch);
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#if defined(__HAVE_RAS)
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ras_purgeall(p);
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#endif
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/*
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* Close open files and release open-file table.
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* This may block!
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@ -1,4 +1,4 @@
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/* $NetBSD: kern_fork.c,v 1.91 2002/08/06 13:58:08 pooka Exp $ */
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/* $NetBSD: kern_fork.c,v 1.92 2002/08/28 07:16:37 gmcgarry Exp $ */
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/*-
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* Copyright (c) 1999, 2001 The NetBSD Foundation, Inc.
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@ -78,7 +78,7 @@
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: kern_fork.c,v 1.91 2002/08/06 13:58:08 pooka Exp $");
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__KERNEL_RCSID(0, "$NetBSD: kern_fork.c,v 1.92 2002/08/28 07:16:37 gmcgarry Exp $");
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#include "opt_ktrace.h"
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#include "opt_systrace.h"
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@ -93,6 +93,7 @@ __KERNEL_RCSID(0, "$NetBSD: kern_fork.c,v 1.91 2002/08/06 13:58:08 pooka Exp $")
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#include <sys/pool.h>
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#include <sys/mount.h>
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#include <sys/proc.h>
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#include <sys/ras.h>
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#include <sys/resourcevar.h>
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#include <sys/vnode.h>
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#include <sys/file.h>
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@ -374,6 +375,13 @@ fork1(struct proc *p1, int flags, int exitsig, void *stack, size_t stacksize,
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p2->p_cred->p_refcnt = 1;
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crhold(p1->p_ucred);
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LIST_INIT(&p2->p_raslist);
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p2->p_nras = 0;
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simple_lock_init(&p2->p_raslock);
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#if defined(__HAVE_RAS)
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ras_fork(p1, p2);
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#endif
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/* bump references to the text vnode (for procfs) */
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p2->p_textvp = p1->p_textvp;
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if (p2->p_textvp)
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@ -1,4 +1,4 @@
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/* $NetBSD: kern_proc.c,v 1.50 2002/07/26 06:04:57 enami Exp $ */
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/* $NetBSD: kern_proc.c,v 1.51 2002/08/28 07:16:38 gmcgarry Exp $ */
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/*-
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* Copyright (c) 1999 The NetBSD Foundation, Inc.
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@ -73,7 +73,7 @@
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: kern_proc.c,v 1.50 2002/07/26 06:04:57 enami Exp $");
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__KERNEL_RCSID(0, "$NetBSD: kern_proc.c,v 1.51 2002/08/28 07:16:38 gmcgarry Exp $");
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#include "opt_kstack.h"
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@ -95,6 +95,7 @@ __KERNEL_RCSID(0, "$NetBSD: kern_proc.c,v 1.50 2002/07/26 06:04:57 enami Exp $")
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#include <sys/ioctl.h>
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#include <sys/tty.h>
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#include <sys/signalvar.h>
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#include <sys/ras.h>
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/*
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* Structure associated with user cacheing.
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@ -151,6 +152,7 @@ struct pool pcred_pool;
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struct pool plimit_pool;
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struct pool pgrp_pool;
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struct pool rusage_pool;
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struct pool ras_pool;
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/*
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* The process list descriptors, used during pid allocation and
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@ -201,6 +203,8 @@ procinit()
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&pool_allocator_nointr);
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pool_init(&rusage_pool, sizeof(struct rusage), 0, 0, 0, "rusgepl",
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&pool_allocator_nointr);
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pool_init(&ras_pool, sizeof(struct ras), 0, 0, 0, "raspl",
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&pool_allocator_nointr);
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}
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/*
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@ -0,0 +1,269 @@
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/* $NetBSD: kern_ras.c,v 1.1 2002/08/28 07:16:39 gmcgarry Exp $ */
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/*-
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* Copyright (c) 2002 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Gregory McGarry.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: kern_ras.c,v 1.1 2002/08/28 07:16:39 gmcgarry Exp $");
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#include <sys/param.h>
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#include <sys/lock.h>
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#include <sys/systm.h>
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#include <sys/pool.h>
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#include <sys/proc.h>
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#include <sys/ras.h>
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#include <sys/mount.h>
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#include <sys/syscallargs.h>
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#include <uvm/uvm_extern.h>
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#define MAX_RAS_PER_PROC 16
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int ras_per_proc = MAX_RAS_PER_PROC;
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#ifdef DEBUG
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int ras_debug = 0;
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#define DPRINTF(x) if (ras_debug) printf x
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#else
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#define DPRINTF(x) /* nothing */
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#endif
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int ras_install(struct proc *, caddr_t, size_t);
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int ras_purge(struct proc *, caddr_t, size_t);
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extern struct pool ras_pool;
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/*
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* Check the specified address to see if it is within the
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* sequence. If it is found, we return the restart address,
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* otherwise we return -1. If we do perform a restart, we
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* mark the sequence as hit.
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*/
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caddr_t
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ras_lookup(struct proc *p, caddr_t addr)
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{
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struct ras *rp;
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#ifdef DIAGNOSTIC
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if (addr < (caddr_t)VM_MIN_ADDRESS ||
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addr > (caddr_t)VM_MAXUSER_ADDRESS)
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return ((caddr_t)-1);
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#endif
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simple_lock(&p->p_raslock);
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LIST_FOREACH(rp, &p->p_raslist, ras_list) {
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if (addr > rp->ras_startaddr && addr < rp->ras_endaddr) {
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rp->ras_hits++;
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simple_unlock(&p->p_raslock);
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#ifdef DIAGNOSTIC
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DPRINTF(("RAS hit: p=%p %p\n", p, addr));
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#endif
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return (rp->ras_startaddr);
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}
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}
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simple_unlock(&p->p_raslock);
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return ((caddr_t)-1);
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}
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/*
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* During a fork, we copy all of the sequences from parent p1 to
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* the child p2.
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*/
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int
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ras_fork(struct proc *p1, struct proc *p2)
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{
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struct ras *rp, *nrp;
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DPRINTF(("ras_fork: p1=%p, p2=%p, p1->p_nras=%d\n",
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p1, p2, p1->p_nras));
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simple_lock(&p1->p_raslock);
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LIST_FOREACH(rp, &p1->p_raslist, ras_list) {
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nrp = pool_get(&ras_pool, PR_NOWAIT);
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nrp->ras_startaddr = rp->ras_startaddr;
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nrp->ras_endaddr = rp->ras_endaddr;
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nrp->ras_hits = 0;
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LIST_INSERT_HEAD(&p2->p_raslist, nrp, ras_list);
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}
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p2->p_nras = p1->p_nras;
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simple_unlock(&p1->p_raslock);
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return (0);
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}
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/*
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* Nuke all sequences for this process.
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*/
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int
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ras_purgeall(struct proc *p)
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{
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struct ras *rp;
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simple_lock(&p->p_raslock);
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while (!LIST_EMPTY(&p->p_raslist)) {
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rp = LIST_FIRST(&p->p_raslist);
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DPRINTF(("RAS %p-%p, hits %d\n", rp->ras_startaddr,
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rp->ras_endaddr, rp->ras_hits));
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LIST_REMOVE(rp, ras_list);
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pool_put(&ras_pool, rp);
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}
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p->p_nras = 0;
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simple_unlock(&p->p_raslock);
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return (0);
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}
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/*
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* Install the new sequence. If it already exists, return
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* an error.
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*/
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int
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ras_install(struct proc *p, caddr_t addr, size_t len)
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{
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struct ras *rp;
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caddr_t endaddr = addr + len;
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if (addr < (caddr_t)VM_MIN_ADDRESS ||
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addr > (caddr_t)VM_MAXUSER_ADDRESS)
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return (EINVAL);
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if (len <= 0)
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return (EINVAL);
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if (p->p_nras >= ras_per_proc)
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return (EINVAL);
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simple_lock(&p->p_raslock);
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LIST_FOREACH(rp, &p->p_raslist, ras_list) {
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if ((addr > rp->ras_startaddr && addr < rp->ras_endaddr) ||
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(endaddr > rp->ras_startaddr &&
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endaddr < rp->ras_endaddr) ||
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(addr < rp->ras_startaddr && endaddr > rp->ras_endaddr)) {
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simple_unlock(&p->p_raslock);
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return (EINVAL);
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}
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}
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rp = pool_get(&ras_pool, PR_NOWAIT);
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rp->ras_startaddr = addr;
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rp->ras_endaddr = endaddr;
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rp->ras_hits = 0;
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LIST_INSERT_HEAD(&p->p_raslist, rp, ras_list);
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p->p_nras++;
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simple_unlock(&p->p_raslock);
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return (0);
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}
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/*
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* Nuke the specified sequence. Both address and len must
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* match, otherwise we return an error.
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*/
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int
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ras_purge(struct proc *p, caddr_t addr, size_t len)
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{
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struct ras *rp;
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caddr_t endaddr = addr + len;
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int error = ESRCH;
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simple_lock(&p->p_raslock);
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LIST_FOREACH(rp, &p->p_raslist, ras_list) {
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if (addr == rp->ras_startaddr && endaddr == rp->ras_endaddr) {
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LIST_REMOVE(rp, ras_list);
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pool_put(&ras_pool, rp);
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p->p_nras--;
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error = 0;
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break;
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}
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}
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simple_unlock(&p->p_raslock);
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return (error);
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}
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/*ARGSUSED*/
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int
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sys_rasctl(struct proc *p, void *v, register_t *retval)
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{
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#if defined(__HAVE_RAS)
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struct sys_rasctl_args /* {
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syscallarg(caddr_t) addr;
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syscallarg(size_t) len;
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syscallarg(int) op;
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} */ *uap = v;
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caddr_t addr;
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size_t len;
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int op;
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int error;
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/*
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* first, extract syscall args from the uap.
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*/
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addr = (caddr_t)SCARG(uap, addr);
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len = (size_t)SCARG(uap, len);
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op = SCARG(uap, op);
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DPRINTF(("sys_rasctl: p=%p addr=%p, len=%d, op=0x%x\n",
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p, addr, len, op));
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switch (op) {
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case RAS_INSTALL:
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error = ras_install(p, addr, len);
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break;
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case RAS_PURGE:
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error = ras_purge(p, addr, len);
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break;
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case RAS_PURGE_ALL:
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error = ras_purgeall(p);
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break;
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default:
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error = EINVAL;
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break;
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}
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return (error);
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#else
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return (EOPNOTSUPP);
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#endif
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}
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@ -1,4 +1,4 @@
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$NetBSD: syscalls.master,v 1.113 2002/08/07 04:52:53 briggs Exp $
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$NetBSD: syscalls.master,v 1.114 2002/08/28 07:16:39 gmcgarry Exp $
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; @(#)syscalls.master 8.2 (Berkeley) 1/13/94
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@ -655,3 +655,4 @@
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void *tramp, int vers); }
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341 STD { int sys_pmc_get_info(int ctr, int op, void *args); }
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342 STD { int sys_pmc_control(int ctr, int op, void *args); }
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343 STD { int sys_rasctl(caddr_t addr, size_t len, int op); }
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@ -1,4 +1,4 @@
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# $NetBSD: Makefile,v 1.42 2002/08/07 05:16:27 briggs Exp $
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# $NetBSD: Makefile,v 1.43 2002/08/28 07:16:34 gmcgarry Exp $
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KDIR= /sys/sys
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INCSDIR= /usr/include/sys
|
||||
|
|
@ -16,7 +16,7 @@ INCS= acct.h agpio.h ansi.h ataio.h audioio.h \
|
|||
localedef.h lock.h lockf.h malloc.h map.h mbuf.h md4.h md5.h midiio.h \
|
||||
mman.h mount.h msg.h msgbuf.h mtio.h namei.h null.h param.h pipe.h \
|
||||
pmc.h poll.h pool.h proc.h properties.h \
|
||||
protosw.h ptrace.h queue.h reboot.h radioio.h resource.h \
|
||||
protosw.h ptrace.h queue.h ras.h reboot.h radioio.h resource.h \
|
||||
resourcevar.h rnd.h scanio.h sched.h scsiio.h select.h sem.h sha1.h \
|
||||
shm.h signal.h signalvar.h socket.h socketvar.h sockio.h stat.h \
|
||||
syscall.h syscallargs.h sysctl.h stdint.h swap.h syslimits.h syslog.h \
|
||||
|
|
|
|||
|
|
@ -1,4 +1,4 @@
|
|||
/* $NetBSD: proc.h,v 1.143 2002/08/06 13:58:09 pooka Exp $ */
|
||||
/* $NetBSD: proc.h,v 1.144 2002/08/28 07:16:33 gmcgarry Exp $ */
|
||||
|
||||
/*-
|
||||
* Copyright (c) 1986, 1989, 1991, 1993
|
||||
|
|
@ -88,6 +88,7 @@ struct pgrp {
|
|||
*/
|
||||
struct exec_package;
|
||||
struct ps_strings;
|
||||
struct ras;
|
||||
|
||||
struct emul {
|
||||
const char *e_name; /* Symbolic name */
|
||||
|
|
@ -174,6 +175,10 @@ struct proc {
|
|||
LIST_ENTRY(proc) p_sibling; /* List of sibling processes */
|
||||
LIST_HEAD(, proc) p_children; /* Pointer to list of children */
|
||||
|
||||
LIST_HEAD(, ras) p_raslist; /* Pointer to RAS queue */
|
||||
u_int p_nras; /* number of RASs */
|
||||
struct simplelock p_raslock; /* Lock for RAS queue */
|
||||
|
||||
/*
|
||||
* The following fields are all zeroed upon creation in fork.
|
||||
*/
|
||||
|
|
|
|||
|
|
@ -0,0 +1,73 @@
|
|||
/* $NetBSD: ras.h,v 1.1 2002/08/28 07:16:33 gmcgarry Exp $ */
|
||||
|
||||
/*-
|
||||
* Copyright (c) 2002 The NetBSD Foundation, Inc.
|
||||
* All rights reserved.
|
||||
*
|
||||
* This code is derived from software contributed to The NetBSD Foundation
|
||||
* by Gregory McGarry.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
* 3. All advertising materials mentioning features or use of this software
|
||||
* must display the following acknowledgement:
|
||||
* This product includes software developed by the NetBSD
|
||||
* Foundation, Inc. and its contributors.
|
||||
* 4. Neither the name of The NetBSD Foundation nor the names of its
|
||||
* contributors may be used to endorse or promote products derived
|
||||
* from this software without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
|
||||
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
|
||||
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
||||
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
|
||||
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
||||
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
||||
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
||||
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
||||
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
||||
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||||
* POSSIBILITY OF SUCH DAMAGE.
|
||||
*/
|
||||
|
||||
#ifndef _SYS_RAS_H_
|
||||
#define _SYS_RAS_H_
|
||||
|
||||
#include <sys/types.h>
|
||||
#include <sys/queue.h>
|
||||
|
||||
struct ras {
|
||||
LIST_ENTRY(ras) ras_list;
|
||||
caddr_t ras_startaddr;
|
||||
caddr_t ras_endaddr;
|
||||
int ras_hits;
|
||||
};
|
||||
|
||||
#define RAS_INSTALL 0
|
||||
#define RAS_PURGE 1
|
||||
#define RAS_PURGE_ALL 2
|
||||
|
||||
#ifdef _KERNEL
|
||||
|
||||
struct proc;
|
||||
|
||||
caddr_t ras_lookup(struct proc *, caddr_t);
|
||||
|
||||
int ras_fork(struct proc *, struct proc *);
|
||||
int ras_purgeall(struct proc *);
|
||||
|
||||
#else
|
||||
|
||||
__BEGIN_DECLS
|
||||
int rasctl(caddr_t, size_t, int);
|
||||
__END_DECLS
|
||||
|
||||
#endif /* _KERNEL */
|
||||
|
||||
#endif /* !_SYS_RAS_H_ */
|
||||
Loading…
Reference in New Issue