a0282ebc04
last few days. I tracked it down to the fact that nfs_reclaim() is setting vp->v_data to NULL _before_ calling vnode_destroy_object(). After silence from the mailing list I checked further and discovered that ufs_reclaim() is unique among FreeBSD filesystems for calling vnode_destroy_object() early, long before tossing v_data or much of anything else, for that matter. The rest, including NFS, appear to be identical, as if they were just clones of one original routine. The enclosed patch fixes all file systems in essentially the same way, by moving the call to vnode_destroy_object() to early in the routine (before the call to vfs_hash_remove(), if any). I have only tested NFS, but I've now run for over eighteen hours with the patch where I wouldn't get past four or five without it. Submitted by: Frank Mayhar Requested by: Mohan Srinivasan MFC After: 1 week
333 lines
8.5 KiB
C
333 lines
8.5 KiB
C
/*-
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* Copyright (c) 1982, 1986, 1989, 1994, 1995
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley
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* by Pace Willisson (pace@blitz.com). The Rock Ridge Extension
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* Support code is derived from software contributed to Berkeley
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* by Atsushi Murai (amurai@spec.co.jp).
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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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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)cd9660_node.c 8.2 (Berkeley) 1/23/94
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/mount.h>
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#include <sys/bio.h>
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#include <sys/buf.h>
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#include <sys/vnode.h>
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#include <sys/malloc.h>
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#include <sys/stat.h>
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#include <sys/mutex.h>
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#include <isofs/cd9660/iso.h>
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#include <isofs/cd9660/cd9660_node.h>
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#include <isofs/cd9660/cd9660_mount.h>
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static unsigned cd9660_chars2ui(unsigned char *begin, int len);
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/*
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* Last reference to an inode, write the inode out and if necessary,
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* truncate and deallocate the file.
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*/
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int
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cd9660_inactive(ap)
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struct vop_inactive_args /* {
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struct vnode *a_vp;
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struct thread *a_td;
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} */ *ap;
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{
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struct vnode *vp = ap->a_vp;
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struct thread *td = ap->a_td;
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struct iso_node *ip = VTOI(vp);
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int error = 0;
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if (prtactive && vrefcnt(vp) != 0)
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vprint("cd9660_inactive: pushing active", vp);
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ip->i_flag = 0;
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/*
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* If we are done with the inode, reclaim it
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* so that it can be reused immediately.
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*/
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if (ip->inode.iso_mode == 0)
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vrecycle(vp, td);
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return error;
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}
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/*
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* Reclaim an inode so that it can be used for other purposes.
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*/
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int
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cd9660_reclaim(ap)
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struct vop_reclaim_args /* {
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struct vnode *a_vp;
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struct thread *a_td;
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} */ *ap;
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{
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struct vnode *vp = ap->a_vp;
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struct iso_node *ip = VTOI(vp);
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if (prtactive && vrefcnt(vp) != 0)
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vprint("cd9660_reclaim: pushing active", vp);
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/*
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* Destroy the vm object and flush associated pages.
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*/
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vnode_destroy_vobject(vp);
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/*
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* Remove the inode from its hash chain.
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*/
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vfs_hash_remove(vp);
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/*
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* Purge old data structures associated with the inode.
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*/
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if (ip->i_mnt->im_devvp)
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vrele(ip->i_mnt->im_devvp);
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FREE(vp->v_data, M_ISOFSNODE);
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vp->v_data = NULL;
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return (0);
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}
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/*
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* File attributes
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*/
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void
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cd9660_defattr(isodir, inop, bp, ftype)
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struct iso_directory_record *isodir;
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struct iso_node *inop;
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struct buf *bp;
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enum ISO_FTYPE ftype;
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{
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struct buf *bp2 = NULL;
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struct iso_mnt *imp;
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struct iso_extended_attributes *ap = NULL;
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int off;
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/* high sierra does not have timezone data, flag is one byte ahead */
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if (isonum_711(ftype == ISO_FTYPE_HIGH_SIERRA?
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&isodir->date[6]: isodir->flags)&2) {
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inop->inode.iso_mode = S_IFDIR;
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/*
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* If we return 2, fts() will assume there are no subdirectories
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* (just links for the path and .), so instead we return 1.
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*/
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inop->inode.iso_links = 1;
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} else {
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inop->inode.iso_mode = S_IFREG;
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inop->inode.iso_links = 1;
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}
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if (!bp
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&& ((imp = inop->i_mnt)->im_flags & ISOFSMNT_EXTATT)
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&& (off = isonum_711(isodir->ext_attr_length))) {
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cd9660_blkatoff(ITOV(inop), (off_t)-(off << imp->im_bshift), NULL,
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&bp2);
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bp = bp2;
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}
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if (bp) {
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ap = (struct iso_extended_attributes *)bp->b_data;
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if (isonum_711(ap->version) == 1) {
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if (!(ap->perm[0]&0x40))
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inop->inode.iso_mode |= VEXEC >> 6;
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if (!(ap->perm[0]&0x10))
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inop->inode.iso_mode |= VREAD >> 6;
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if (!(ap->perm[0]&4))
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inop->inode.iso_mode |= VEXEC >> 3;
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if (!(ap->perm[0]&1))
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inop->inode.iso_mode |= VREAD >> 3;
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if (!(ap->perm[1]&0x40))
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inop->inode.iso_mode |= VEXEC;
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if (!(ap->perm[1]&0x10))
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inop->inode.iso_mode |= VREAD;
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inop->inode.iso_uid = isonum_723(ap->owner); /* what about 0? */
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inop->inode.iso_gid = isonum_723(ap->group); /* what about 0? */
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} else
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ap = NULL;
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}
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if (!ap) {
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inop->inode.iso_mode |= VREAD|VEXEC|(VREAD|VEXEC)>>3|(VREAD|VEXEC)>>6;
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inop->inode.iso_uid = (uid_t)0;
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inop->inode.iso_gid = (gid_t)0;
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}
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if (bp2)
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brelse(bp2);
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}
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/*
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* Time stamps
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*/
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void
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cd9660_deftstamp(isodir,inop,bp,ftype)
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struct iso_directory_record *isodir;
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struct iso_node *inop;
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struct buf *bp;
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enum ISO_FTYPE ftype;
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{
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struct buf *bp2 = NULL;
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struct iso_mnt *imp;
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struct iso_extended_attributes *ap = NULL;
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int off;
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if (!bp
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&& ((imp = inop->i_mnt)->im_flags & ISOFSMNT_EXTATT)
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&& (off = isonum_711(isodir->ext_attr_length))) {
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cd9660_blkatoff(ITOV(inop), (off_t)-(off << imp->im_bshift), NULL,
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&bp2);
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bp = bp2;
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}
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if (bp) {
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ap = (struct iso_extended_attributes *)bp->b_data;
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if (ftype != ISO_FTYPE_HIGH_SIERRA
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&& isonum_711(ap->version) == 1) {
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if (!cd9660_tstamp_conv17(ap->ftime,&inop->inode.iso_atime))
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cd9660_tstamp_conv17(ap->ctime,&inop->inode.iso_atime);
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if (!cd9660_tstamp_conv17(ap->ctime,&inop->inode.iso_ctime))
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inop->inode.iso_ctime = inop->inode.iso_atime;
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if (!cd9660_tstamp_conv17(ap->mtime,&inop->inode.iso_mtime))
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inop->inode.iso_mtime = inop->inode.iso_ctime;
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} else
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ap = NULL;
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}
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if (!ap) {
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cd9660_tstamp_conv7(isodir->date,&inop->inode.iso_ctime,ftype);
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inop->inode.iso_atime = inop->inode.iso_ctime;
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inop->inode.iso_mtime = inop->inode.iso_ctime;
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}
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if (bp2)
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brelse(bp2);
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}
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int
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cd9660_tstamp_conv7(pi,pu,ftype)
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u_char *pi;
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struct timespec *pu;
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enum ISO_FTYPE ftype;
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{
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int crtime, days;
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int y, m, d, hour, minute, second, tz;
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y = pi[0] + 1900;
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m = pi[1];
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d = pi[2];
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hour = pi[3];
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minute = pi[4];
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second = pi[5];
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if(ftype != ISO_FTYPE_HIGH_SIERRA)
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tz = pi[6];
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else
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/* original high sierra misses timezone data */
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tz = 0;
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if (y < 1970) {
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pu->tv_sec = 0;
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pu->tv_nsec = 0;
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return 0;
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} else {
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#ifdef ORIGINAL
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/* computes day number relative to Sept. 19th,1989 */
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/* don't even *THINK* about changing formula. It works! */
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days = 367*(y-1980)-7*(y+(m+9)/12)/4-3*((y+(m-9)/7)/100+1)/4+275*m/9+d-100;
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#else
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/*
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* Changed :-) to make it relative to Jan. 1st, 1970
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* and to disambiguate negative division
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*/
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days = 367*(y-1960)-7*(y+(m+9)/12)/4-3*((y+(m+9)/12-1)/100+1)/4+275*m/9+d-239;
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#endif
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crtime = ((((days * 24) + hour) * 60 + minute) * 60) + second;
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/* timezone offset is unreliable on some disks */
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if (-48 <= tz && tz <= 52)
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crtime -= tz * 15 * 60;
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}
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pu->tv_sec = crtime;
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pu->tv_nsec = 0;
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return 1;
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}
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static u_int
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cd9660_chars2ui(begin,len)
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u_char *begin;
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int len;
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{
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u_int rc;
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for (rc = 0; --len >= 0;) {
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rc *= 10;
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rc += *begin++ - '0';
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}
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return rc;
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}
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int
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cd9660_tstamp_conv17(pi,pu)
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u_char *pi;
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struct timespec *pu;
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{
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u_char buf[7];
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/* year:"0001"-"9999" -> -1900 */
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buf[0] = cd9660_chars2ui(pi,4) - 1900;
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/* month: " 1"-"12" -> 1 - 12 */
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buf[1] = cd9660_chars2ui(pi + 4,2);
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/* day: " 1"-"31" -> 1 - 31 */
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buf[2] = cd9660_chars2ui(pi + 6,2);
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/* hour: " 0"-"23" -> 0 - 23 */
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buf[3] = cd9660_chars2ui(pi + 8,2);
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/* minute:" 0"-"59" -> 0 - 59 */
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buf[4] = cd9660_chars2ui(pi + 10,2);
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/* second:" 0"-"59" -> 0 - 59 */
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buf[5] = cd9660_chars2ui(pi + 12,2);
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/* difference of GMT */
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buf[6] = pi[16];
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return cd9660_tstamp_conv7(buf, pu, ISO_FTYPE_DEFAULT);
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}
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ino_t
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isodirino(isodir, imp)
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struct iso_directory_record *isodir;
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struct iso_mnt *imp;
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{
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ino_t ino;
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ino = (isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length))
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<< imp->im_bshift;
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return (ino);
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}
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