1130b656e5
This will make a number of things easier in the future, as well as (finally!) avoiding the Id-smashing problem which has plagued developers for so long. Boy, I'm glad we're not using sup anymore. This update would have been insane otherwise.
364 lines
14 KiB
C
364 lines
14 KiB
C
/*
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* Copyright (c) 1986, 1989, 1991, 1993
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* The Regents of the University of California. All rights reserved.
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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 University of
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* California, Berkeley and its contributors.
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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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* @(#)lfs_vnops.c 8.5 (Berkeley) 12/30/93
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* $FreeBSD$
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/namei.h>
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#include <sys/resourcevar.h>
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#include <sys/signalvar.h>
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#include <sys/kernel.h>
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#include <sys/file.h>
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#include <sys/stat.h>
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#include <sys/buf.h>
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#include <sys/proc.h>
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#include <sys/conf.h>
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#include <sys/mount.h>
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#include <sys/vnode.h>
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#include <sys/malloc.h>
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#include <vm/vm.h>
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#include <vm/vm_param.h>
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#include <vm/vm_prot.h>
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#include <vm/vm_page.h>
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#include <vm/vm_object.h>
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#include <vm/vm_extern.h>
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#include <miscfs/specfs/specdev.h>
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#include <miscfs/fifofs/fifo.h>
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#include <ufs/ufs/quota.h>
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#include <ufs/ufs/inode.h>
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#include <ufs/ufs/dir.h>
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#include <ufs/ufs/ufsmount.h>
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#include <ufs/ufs/ufs_extern.h>
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#include <ufs/lfs/lfs.h>
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#include <ufs/lfs/lfs_extern.h>
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static int lfs_close __P((struct vop_close_args *));
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static int lfs_fsync __P((struct vop_fsync_args *));
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static int lfs_getattr __P((struct vop_getattr_args *));
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static int lfs_inactive __P((struct vop_inactive_args *));
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static int lfs_read __P((struct vop_read_args *));
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static int lfs_write __P((struct vop_write_args *));
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/* Global vfs data structures for lfs. */
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vop_t **lfs_vnodeop_p;
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static struct vnodeopv_entry_desc lfs_vnodeop_entries[] = {
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{ &vop_default_desc, (vop_t *)vn_default_error },
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{ &vop_lookup_desc, (vop_t *)ufs_lookup }, /* lookup */
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{ &vop_create_desc, (vop_t *)ufs_create }, /* create */
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{ &vop_mknod_desc, (vop_t *)ufs_mknod }, /* mknod */
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{ &vop_open_desc, (vop_t *)ufs_open }, /* open */
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{ &vop_close_desc, (vop_t *)lfs_close }, /* close */
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{ &vop_access_desc, (vop_t *)ufs_access }, /* access */
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{ &vop_getattr_desc, (vop_t *)lfs_getattr }, /* getattr */
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{ &vop_setattr_desc, (vop_t *)ufs_setattr }, /* setattr */
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{ &vop_read_desc, (vop_t *)lfs_read }, /* read */
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{ &vop_write_desc, (vop_t *)lfs_write }, /* write */
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{ &vop_ioctl_desc, (vop_t *)ufs_ioctl }, /* ioctl */
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{ &vop_select_desc, (vop_t *)ufs_select }, /* select */
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{ &vop_mmap_desc, (vop_t *)ufs_mmap }, /* mmap */
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{ &vop_fsync_desc, (vop_t *)lfs_fsync }, /* fsync */
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{ &vop_seek_desc, (vop_t *)ufs_seek }, /* seek */
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{ &vop_remove_desc, (vop_t *)ufs_remove }, /* remove */
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{ &vop_link_desc, (vop_t *)ufs_link }, /* link */
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{ &vop_rename_desc, (vop_t *)ufs_rename }, /* rename */
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{ &vop_mkdir_desc, (vop_t *)ufs_mkdir }, /* mkdir */
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{ &vop_rmdir_desc, (vop_t *)ufs_rmdir }, /* rmdir */
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{ &vop_symlink_desc, (vop_t *)ufs_symlink }, /* symlink */
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{ &vop_readdir_desc, (vop_t *)ufs_readdir }, /* readdir */
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{ &vop_readlink_desc, (vop_t *)ufs_readlink }, /* readlink */
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{ &vop_abortop_desc, (vop_t *)ufs_abortop }, /* abortop */
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{ &vop_inactive_desc, (vop_t *)lfs_inactive }, /* inactive */
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{ &vop_reclaim_desc, (vop_t *)ufs_reclaim }, /* reclaim */
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{ &vop_lock_desc, (vop_t *)ufs_lock }, /* lock */
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{ &vop_unlock_desc, (vop_t *)ufs_unlock }, /* unlock */
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{ &vop_bmap_desc, (vop_t *)ufs_bmap }, /* bmap */
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{ &vop_strategy_desc, (vop_t *)ufs_strategy }, /* strategy */
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{ &vop_print_desc, (vop_t *)ufs_print }, /* print */
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{ &vop_islocked_desc, (vop_t *)ufs_islocked }, /* islocked */
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{ &vop_pathconf_desc, (vop_t *)ufs_pathconf }, /* pathconf */
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{ &vop_advlock_desc, (vop_t *)ufs_advlock }, /* advlock */
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{ &vop_blkatoff_desc, (vop_t *)lfs_blkatoff }, /* blkatoff */
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{ &vop_valloc_desc, (vop_t *)lfs_valloc }, /* valloc */
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{ &vop_vfree_desc, (vop_t *)lfs_vfree }, /* vfree */
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{ &vop_truncate_desc, (vop_t *)lfs_truncate }, /* truncate */
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{ &vop_update_desc, (vop_t *)lfs_update }, /* update */
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{ &vop_bwrite_desc, (vop_t *)lfs_bwrite }, /* bwrite */
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{ NULL, NULL }
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};
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static struct vnodeopv_desc lfs_vnodeop_opv_desc =
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{ &lfs_vnodeop_p, lfs_vnodeop_entries };
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vop_t **lfs_specop_p;
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static struct vnodeopv_entry_desc lfs_specop_entries[] = {
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{ &vop_default_desc, (vop_t *)vn_default_error },
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{ &vop_lookup_desc, (vop_t *)spec_lookup }, /* lookup */
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{ &vop_create_desc, (vop_t *)spec_create }, /* create */
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{ &vop_mknod_desc, (vop_t *)spec_mknod }, /* mknod */
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{ &vop_open_desc, (vop_t *)spec_open }, /* open */
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{ &vop_close_desc, (vop_t *)ufsspec_close }, /* close */
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{ &vop_access_desc, (vop_t *)ufs_access }, /* access */
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{ &vop_getattr_desc, (vop_t *)lfs_getattr }, /* getattr */
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{ &vop_setattr_desc, (vop_t *)ufs_setattr }, /* setattr */
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{ &vop_read_desc, (vop_t *)ufsspec_read }, /* read */
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{ &vop_write_desc, (vop_t *)ufsspec_write }, /* write */
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{ &vop_ioctl_desc, (vop_t *)spec_ioctl }, /* ioctl */
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{ &vop_select_desc, (vop_t *)spec_select }, /* select */
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{ &vop_mmap_desc, (vop_t *)spec_mmap }, /* mmap */
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{ &vop_fsync_desc, (vop_t *)spec_fsync }, /* fsync */
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{ &vop_seek_desc, (vop_t *)spec_seek }, /* seek */
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{ &vop_remove_desc, (vop_t *)spec_remove }, /* remove */
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{ &vop_link_desc, (vop_t *)spec_link }, /* link */
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{ &vop_rename_desc, (vop_t *)spec_rename }, /* rename */
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{ &vop_mkdir_desc, (vop_t *)spec_mkdir }, /* mkdir */
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{ &vop_rmdir_desc, (vop_t *)spec_rmdir }, /* rmdir */
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{ &vop_symlink_desc, (vop_t *)spec_symlink }, /* symlink */
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{ &vop_readdir_desc, (vop_t *)spec_readdir }, /* readdir */
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{ &vop_readlink_desc, (vop_t *)spec_readlink }, /* readlink */
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{ &vop_abortop_desc, (vop_t *)spec_abortop }, /* abortop */
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{ &vop_inactive_desc, (vop_t *)lfs_inactive }, /* inactive */
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{ &vop_reclaim_desc, (vop_t *)ufs_reclaim }, /* reclaim */
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{ &vop_lock_desc, (vop_t *)ufs_lock }, /* lock */
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{ &vop_unlock_desc, (vop_t *)ufs_unlock }, /* unlock */
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{ &vop_bmap_desc, (vop_t *)spec_bmap }, /* bmap */
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{ &vop_strategy_desc, (vop_t *)spec_strategy }, /* strategy */
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{ &vop_print_desc, (vop_t *)ufs_print }, /* print */
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{ &vop_islocked_desc, (vop_t *)ufs_islocked }, /* islocked */
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{ &vop_pathconf_desc, (vop_t *)spec_pathconf }, /* pathconf */
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{ &vop_advlock_desc, (vop_t *)spec_advlock }, /* advlock */
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{ &vop_blkatoff_desc, (vop_t *)spec_blkatoff }, /* blkatoff */
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{ &vop_valloc_desc, (vop_t *)spec_valloc }, /* valloc */
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{ &vop_vfree_desc, (vop_t *)lfs_vfree }, /* vfree */
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{ &vop_truncate_desc, (vop_t *)spec_truncate }, /* truncate */
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{ &vop_update_desc, (vop_t *)lfs_update }, /* update */
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{ &vop_bwrite_desc, (vop_t *)lfs_bwrite }, /* bwrite */
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{ NULL, NULL }
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};
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static struct vnodeopv_desc lfs_specop_opv_desc =
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{ &lfs_specop_p, lfs_specop_entries };
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vop_t **lfs_fifoop_p;
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static struct vnodeopv_entry_desc lfs_fifoop_entries[] = {
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{ &vop_default_desc, (vop_t *)vn_default_error },
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{ &vop_lookup_desc, (vop_t *)fifo_lookup }, /* lookup */
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{ &vop_create_desc, (vop_t *)fifo_create }, /* create */
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{ &vop_mknod_desc, (vop_t *)fifo_mknod }, /* mknod */
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{ &vop_open_desc, (vop_t *)fifo_open }, /* open */
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{ &vop_close_desc, (vop_t *)ufsfifo_close }, /* close */
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{ &vop_access_desc, (vop_t *)ufs_access }, /* access */
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{ &vop_getattr_desc, (vop_t *)lfs_getattr }, /* getattr */
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{ &vop_setattr_desc, (vop_t *)ufs_setattr }, /* setattr */
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{ &vop_read_desc, (vop_t *)ufsfifo_read }, /* read */
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{ &vop_write_desc, (vop_t *)ufsfifo_write }, /* write */
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{ &vop_ioctl_desc, (vop_t *)fifo_ioctl }, /* ioctl */
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{ &vop_select_desc, (vop_t *)fifo_select }, /* select */
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{ &vop_mmap_desc, (vop_t *)fifo_mmap }, /* mmap */
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{ &vop_fsync_desc, (vop_t *)fifo_fsync }, /* fsync */
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{ &vop_seek_desc, (vop_t *)fifo_seek }, /* seek */
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{ &vop_remove_desc, (vop_t *)fifo_remove }, /* remove */
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{ &vop_link_desc, (vop_t *)fifo_link }, /* link */
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{ &vop_rename_desc, (vop_t *)fifo_rename }, /* rename */
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{ &vop_mkdir_desc, (vop_t *)fifo_mkdir }, /* mkdir */
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{ &vop_rmdir_desc, (vop_t *)fifo_rmdir }, /* rmdir */
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{ &vop_symlink_desc, (vop_t *)fifo_symlink }, /* symlink */
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{ &vop_readdir_desc, (vop_t *)fifo_readdir }, /* readdir */
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{ &vop_readlink_desc, (vop_t *)fifo_readlink }, /* readlink */
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{ &vop_abortop_desc, (vop_t *)fifo_abortop }, /* abortop */
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{ &vop_inactive_desc, (vop_t *)lfs_inactive }, /* inactive */
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{ &vop_reclaim_desc, (vop_t *)ufs_reclaim }, /* reclaim */
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{ &vop_lock_desc, (vop_t *)ufs_lock }, /* lock */
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{ &vop_unlock_desc, (vop_t *)ufs_unlock }, /* unlock */
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{ &vop_bmap_desc, (vop_t *)fifo_bmap }, /* bmap */
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{ &vop_strategy_desc, (vop_t *)fifo_strategy }, /* strategy */
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{ &vop_print_desc, (vop_t *)ufs_print }, /* print */
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{ &vop_islocked_desc, (vop_t *)ufs_islocked }, /* islocked */
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{ &vop_pathconf_desc, (vop_t *)fifo_pathconf }, /* pathconf */
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{ &vop_advlock_desc, (vop_t *)fifo_advlock }, /* advlock */
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{ &vop_blkatoff_desc, (vop_t *)fifo_blkatoff }, /* blkatoff */
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{ &vop_valloc_desc, (vop_t *)fifo_valloc }, /* valloc */
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{ &vop_vfree_desc, (vop_t *)lfs_vfree }, /* vfree */
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{ &vop_truncate_desc, (vop_t *)fifo_truncate }, /* truncate */
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{ &vop_update_desc, (vop_t *)lfs_update }, /* update */
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{ &vop_bwrite_desc, (vop_t *)lfs_bwrite }, /* bwrite */
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{ NULL, NULL }
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};
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static struct vnodeopv_desc lfs_fifoop_opv_desc =
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{ &lfs_fifoop_p, lfs_fifoop_entries };
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VNODEOP_SET(lfs_vnodeop_opv_desc);
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VNODEOP_SET(lfs_specop_opv_desc);
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VNODEOP_SET(lfs_fifoop_opv_desc);
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#define LFS_READWRITE
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#include <ufs/ufs/ufs_readwrite.c>
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#undef LFS_READWRITE
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/*
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* Synch an open file.
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*/
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/* ARGSUSED */
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static int
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lfs_fsync(ap)
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struct vop_fsync_args /* {
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struct vnode *a_vp;
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struct ucred *a_cred;
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int a_waitfor;
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struct proc *a_p;
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} */ *ap;
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{
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struct timeval tv;
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int error;
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tv = time;
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error = (VOP_UPDATE(ap->a_vp, &tv, &tv,
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ap->a_waitfor == MNT_WAIT ? LFS_SYNC : 0));
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if(ap->a_waitfor == MNT_WAIT && ap->a_vp->v_dirtyblkhd.lh_first != NULL)
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panic("lfs_fsync: dirty bufs");
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return( error );
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}
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/*
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* These macros are used to bracket UFS directory ops, so that we can
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* identify all the pages touched during directory ops which need to
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* be ordered and flushed atomically, so that they may be recovered.
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*/
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#define SET_DIROP(fs) { \
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if ((fs)->lfs_writer) \
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tsleep(&(fs)->lfs_dirops, PRIBIO + 1, "lfs_dirop", 0); \
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++(fs)->lfs_dirops; \
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(fs)->lfs_doifile = 1; \
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}
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#define SET_ENDOP(fs) { \
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--(fs)->lfs_dirops; \
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if (!(fs)->lfs_dirops) \
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wakeup(&(fs)->lfs_writer); \
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}
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#define MARK_VNODE(dvp) (dvp)->v_flag |= VDIROP
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/* XXX hack to avoid calling ITIMES in getattr */
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static int
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lfs_getattr(ap)
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struct vop_getattr_args /* {
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struct vnode *a_vp;
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struct vattr *a_vap;
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struct ucred *a_cred;
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struct proc *a_p;
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} */ *ap;
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{
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register struct vnode *vp = ap->a_vp;
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register struct inode *ip = VTOI(vp);
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register struct vattr *vap = ap->a_vap;
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/*
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* Copy from inode table
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*/
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vap->va_fsid = ip->i_dev;
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vap->va_fileid = ip->i_number;
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vap->va_mode = ip->i_mode & ~IFMT;
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vap->va_nlink = ip->i_nlink;
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vap->va_uid = ip->i_uid;
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vap->va_gid = ip->i_gid;
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vap->va_rdev = (dev_t)ip->i_rdev;
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vap->va_size = ip->i_din.di_size;
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vap->va_atime = ip->i_atime;
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vap->va_mtime = ip->i_mtime;
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vap->va_ctime = ip->i_ctime;
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vap->va_flags = ip->i_flags;
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vap->va_gen = ip->i_gen;
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/* this doesn't belong here */
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if (vp->v_type == VBLK)
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vap->va_blocksize = BLKDEV_IOSIZE;
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else if (vp->v_type == VCHR)
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vap->va_blocksize = MAXBSIZE;
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else
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vap->va_blocksize = vp->v_mount->mnt_stat.f_iosize;
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vap->va_bytes = dbtob(ip->i_blocks);
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vap->va_type = vp->v_type;
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vap->va_filerev = ip->i_modrev;
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return (0);
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}
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/*
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* Close called
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*
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* XXX -- we were using ufs_close, but since it updates the
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* times on the inode, we might need to bump the uinodes
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* count.
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*/
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/* ARGSUSED */
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static int
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lfs_close(ap)
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struct vop_close_args /* {
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struct vnode *a_vp;
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int a_fflag;
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struct ucred *a_cred;
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struct proc *a_p;
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} */ *ap;
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{
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register struct vnode *vp = ap->a_vp;
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register struct inode *ip = VTOI(vp);
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int mod;
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if (vp->v_usecount > 1 && !(ip->i_flag & IN_LOCKED)) {
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mod = ip->i_flag & IN_MODIFIED;
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ITIMES(ip, &time, &time);
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if (!mod && ip->i_flag & IN_MODIFIED)
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ip->i_lfs->lfs_uinodes++;
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}
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return (0);
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}
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/*
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* Stub inactive routine that avoids calling ufs_inactive in some cases.
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*/
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static int
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lfs_inactive(ap)
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struct vop_inactive_args /* {
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struct vnode *a_vp;
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} */ *ap;
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{
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if (ap->a_vp->v_flag & VNINACT) {
|
|
return(0);
|
|
}
|
|
return (ufs_inactive(ap));
|
|
}
|