65a271ba6d
file for GPL restrictions. This code was ported to the BSD platform by Godmar Back <gback@facility.cs.utah.edu> and specifically to FreeBSD by John Dyson. This code is still green and should be used with caution. Additional changes to UFS necessary to make this code work will be commited seperately. Submitted by: Godmar Back <gback@facility.cs.utah.edu> Obtained from: Lites/Mach4
339 lines
12 KiB
C
339 lines
12 KiB
C
/*
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* modified for EXT2FS support in Lites 1.1
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*
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* Aug 1995, Godmar Back (gback@cs.utah.edu)
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* University of Utah, Department of Computer Science
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*/
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/*
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* Copyright (c) 1982, 1986, 1989, 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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* @(#)ext2_vnops.c 8.7 (Berkeley) 2/3/94
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*/
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#if !defined(__FreeBSD__)
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#include "fifo.h"
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#include "diagnostic.h"
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#endif
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/resourcevar.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 <miscfs/specfs/specdev.h>
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#include <miscfs/fifofs/fifo.h>
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#if !defined(__FreeBSD__)
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#include <ufs/ufs/lockf.h>
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#else
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#include <lockf.h>
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#include <sys/signalvar.h>
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#endif
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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/ufs_extern.h>
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#include <gnu/ext2fs/ext2_fs.h>
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#include <gnu/ext2fs/ext2_fs_sb.h>
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#include <gnu/ext2fs/fs.h>
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#include <gnu/ext2fs/ext2_extern.h>
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/* Global vfs data structures for ufs. */
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int (**ext2_vnodeop_p)();
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struct vnodeopv_entry_desc ext2_vnodeop_entries[] = {
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{ &vop_default_desc, vn_default_error },
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{ &vop_lookup_desc, ext2_lookup }, /* lookup */
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{ &vop_create_desc, ufs_create }, /* create */
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{ &vop_mknod_desc, ufs_mknod }, /* mknod */
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{ &vop_open_desc, ufs_open }, /* open */
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{ &vop_close_desc, ufs_close }, /* close */
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{ &vop_access_desc, ufs_access }, /* access */
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{ &vop_getattr_desc, ufs_getattr }, /* getattr */
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{ &vop_setattr_desc, ufs_setattr }, /* setattr */
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{ &vop_read_desc, ext2_read }, /* read */
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{ &vop_write_desc, ext2_write }, /* write */
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{ &vop_ioctl_desc, ufs_ioctl }, /* ioctl */
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{ &vop_select_desc, ufs_select }, /* select */
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{ &vop_mmap_desc, ufs_mmap }, /* mmap */
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{ &vop_fsync_desc, ext2_fsync }, /* fsync */
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{ &vop_seek_desc, ufs_seek }, /* seek */
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{ &vop_remove_desc, ufs_remove }, /* remove */
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{ &vop_link_desc, ufs_link }, /* link */
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{ &vop_rename_desc, ufs_rename }, /* rename */
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{ &vop_mkdir_desc, ufs_mkdir }, /* mkdir */
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{ &vop_rmdir_desc, ufs_rmdir }, /* rmdir */
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{ &vop_symlink_desc, ufs_symlink }, /* symlink */
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{ &vop_readdir_desc, ext2_readdir }, /* readdir */
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{ &vop_readlink_desc, ufs_readlink }, /* readlink */
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{ &vop_abortop_desc, ufs_abortop }, /* abortop */
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{ &vop_inactive_desc, ext2_inactive }, /* inactive */
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{ &vop_reclaim_desc, ufs_reclaim }, /* reclaim */
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{ &vop_lock_desc, ufs_lock }, /* lock */
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{ &vop_unlock_desc, ufs_unlock }, /* unlock */
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{ &vop_bmap_desc, ufs_bmap }, /* bmap */
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{ &vop_strategy_desc, ufs_strategy }, /* strategy */
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{ &vop_print_desc, ufs_print }, /* print */
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{ &vop_islocked_desc, ufs_islocked }, /* islocked */
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{ &vop_pathconf_desc, ufs_pathconf }, /* pathconf */
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{ &vop_advlock_desc, ufs_advlock }, /* advlock */
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{ &vop_blkatoff_desc, ext2_blkatoff }, /* blkatoff */
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{ &vop_valloc_desc, ext2_valloc }, /* valloc */
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{ &vop_reallocblks_desc, ext2_reallocblks }, /* reallocblks */
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{ &vop_vfree_desc, ext2_vfree }, /* vfree */
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{ &vop_truncate_desc, ext2_truncate }, /* truncate */
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{ &vop_update_desc, ext2_update }, /* update */
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{ &vop_bwrite_desc, vn_bwrite },
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{ (struct vnodeop_desc*)NULL, (int(*)())NULL }
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};
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struct vnodeopv_desc ext2fs_vnodeop_opv_desc =
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{ &ext2_vnodeop_p, ext2_vnodeop_entries };
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int (**ext2_specop_p)();
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struct vnodeopv_entry_desc ext2_specop_entries[] = {
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{ &vop_default_desc, vn_default_error },
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{ &vop_lookup_desc, spec_lookup }, /* lookup */
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{ &vop_create_desc, spec_create }, /* create */
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{ &vop_mknod_desc, spec_mknod }, /* mknod */
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{ &vop_open_desc, spec_open }, /* open */
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{ &vop_close_desc, ufsspec_close }, /* close */
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{ &vop_access_desc, ufs_access }, /* access */
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{ &vop_getattr_desc, ufs_getattr }, /* getattr */
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{ &vop_setattr_desc, ufs_setattr }, /* setattr */
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{ &vop_read_desc, ufsspec_read }, /* read */
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{ &vop_write_desc, ufsspec_write }, /* write */
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{ &vop_ioctl_desc, spec_ioctl }, /* ioctl */
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{ &vop_select_desc, spec_select }, /* select */
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{ &vop_mmap_desc, spec_mmap }, /* mmap */
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{ &vop_fsync_desc, ext2_fsync }, /* fsync */
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{ &vop_seek_desc, spec_seek }, /* seek */
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{ &vop_remove_desc, spec_remove }, /* remove */
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{ &vop_link_desc, spec_link }, /* link */
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{ &vop_rename_desc, spec_rename }, /* rename */
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{ &vop_mkdir_desc, spec_mkdir }, /* mkdir */
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{ &vop_rmdir_desc, spec_rmdir }, /* rmdir */
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{ &vop_symlink_desc, spec_symlink }, /* symlink */
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{ &vop_readdir_desc, spec_readdir }, /* readdir */
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{ &vop_readlink_desc, spec_readlink }, /* readlink */
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{ &vop_abortop_desc, spec_abortop }, /* abortop */
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{ &vop_inactive_desc, ext2_inactive }, /* inactive */
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{ &vop_reclaim_desc, ufs_reclaim }, /* reclaim */
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{ &vop_lock_desc, ufs_lock }, /* lock */
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{ &vop_unlock_desc, ufs_unlock }, /* unlock */
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{ &vop_bmap_desc, spec_bmap }, /* bmap */
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{ &vop_strategy_desc, spec_strategy }, /* strategy */
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{ &vop_print_desc, ufs_print }, /* print */
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{ &vop_islocked_desc, ufs_islocked }, /* islocked */
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{ &vop_pathconf_desc, spec_pathconf }, /* pathconf */
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{ &vop_advlock_desc, spec_advlock }, /* advlock */
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{ &vop_blkatoff_desc, spec_blkatoff }, /* blkatoff */
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{ &vop_valloc_desc, spec_valloc }, /* valloc */
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{ &vop_reallocblks_desc, spec_reallocblks }, /* reallocblks */
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{ &vop_vfree_desc, ext2_vfree }, /* vfree */
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{ &vop_truncate_desc, spec_truncate }, /* truncate */
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{ &vop_update_desc, ext2_update }, /* update */
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{ &vop_bwrite_desc, vn_bwrite },
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{ (struct vnodeop_desc*)NULL, (int(*)())NULL }
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};
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struct vnodeopv_desc ext2fs_specop_opv_desc =
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{ &ext2_specop_p, ext2_specop_entries };
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#if FIFO
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int (**ext2_fifoop_p)();
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struct vnodeopv_entry_desc ext2_fifoop_entries[] = {
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{ &vop_default_desc, vn_default_error },
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{ &vop_lookup_desc, fifo_lookup }, /* lookup */
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{ &vop_create_desc, fifo_create }, /* create */
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{ &vop_mknod_desc, fifo_mknod }, /* mknod */
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{ &vop_open_desc, fifo_open }, /* open */
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{ &vop_close_desc, ufsfifo_close }, /* close */
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{ &vop_access_desc, ufs_access }, /* access */
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{ &vop_getattr_desc, ufs_getattr }, /* getattr */
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{ &vop_setattr_desc, ufs_setattr }, /* setattr */
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{ &vop_read_desc, ufsfifo_read }, /* read */
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{ &vop_write_desc, ufsfifo_write }, /* write */
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{ &vop_ioctl_desc, fifo_ioctl }, /* ioctl */
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{ &vop_select_desc, fifo_select }, /* select */
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{ &vop_mmap_desc, fifo_mmap }, /* mmap */
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{ &vop_fsync_desc, ext2_fsync }, /* fsync */
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{ &vop_seek_desc, fifo_seek }, /* seek */
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{ &vop_remove_desc, fifo_remove }, /* remove */
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{ &vop_link_desc, fifo_link }, /* link */
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{ &vop_rename_desc, fifo_rename }, /* rename */
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{ &vop_mkdir_desc, fifo_mkdir }, /* mkdir */
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{ &vop_rmdir_desc, fifo_rmdir }, /* rmdir */
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{ &vop_symlink_desc, fifo_symlink }, /* symlink */
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{ &vop_readdir_desc, fifo_readdir }, /* readdir */
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{ &vop_readlink_desc, fifo_readlink }, /* readlink */
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{ &vop_abortop_desc, fifo_abortop }, /* abortop */
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{ &vop_inactive_desc, ext2_inactive }, /* inactive */
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{ &vop_reclaim_desc, ufs_reclaim }, /* reclaim */
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{ &vop_lock_desc, ufs_lock }, /* lock */
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{ &vop_unlock_desc, ufs_unlock }, /* unlock */
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{ &vop_bmap_desc, fifo_bmap }, /* bmap */
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{ &vop_strategy_desc, fifo_strategy }, /* strategy */
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{ &vop_print_desc, ufs_print }, /* print */
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{ &vop_islocked_desc, ufs_islocked }, /* islocked */
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{ &vop_pathconf_desc, fifo_pathconf }, /* pathconf */
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{ &vop_advlock_desc, fifo_advlock }, /* advlock */
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{ &vop_blkatoff_desc, fifo_blkatoff }, /* blkatoff */
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{ &vop_valloc_desc, fifo_valloc }, /* valloc */
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{ &vop_reallocblks_desc, fifo_reallocblks }, /* reallocblks */
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{ &vop_vfree_desc, ext2_vfree }, /* vfree */
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{ &vop_truncate_desc, fifo_truncate }, /* truncate */
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{ &vop_update_desc, ext2_update }, /* update */
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{ &vop_bwrite_desc, vn_bwrite },
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{ (struct vnodeop_desc*)NULL, (int(*)())NULL }
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};
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struct vnodeopv_desc ext2fs_fifoop_opv_desc =
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{ &ext2_fifoop_p, ext2_fifoop_entries };
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#endif /* FIFO */
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#if defined(__FreeBSD__)
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VNODEOP_SET(ext2fs_vnodeop_opv_desc);
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VNODEOP_SET(ext2fs_specop_opv_desc);
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VNODEOP_SET(ext2fs_fifoop_opv_desc);
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#endif
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/*
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* Enabling cluster read/write operations.
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*/
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#ifdef DEBUG
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#include <sys/sysctl.h>
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int doclusterread = 1;
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struct ctldebug debug11 = { "doclusterread", &doclusterread };
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int doclusterwrite = 1;
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struct ctldebug debug12 = { "doclusterwrite", &doclusterwrite };
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#endif
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#if defined(__FreeBSD__)
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#define doclusterwrite 1
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#define doclusterread 1
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#else
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/* doclusterwrite is being tested
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note that reallocblks is called when it's on, but this is not implemented */
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#define doclusterwrite 0
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/* doclusterread should work with new pagemove */
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#define doclusterread 1
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#endif
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#include <gnu/ext2fs/ext2_readwrite.c>
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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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int
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ext2_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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register struct vnode *vp = ap->a_vp;
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register struct buf *bp;
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struct timeval tv;
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struct buf *nbp;
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int s;
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/*
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* Clean memory object.
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* XXX add this to all file systems.
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* XXX why is all this fs specific?
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*/
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#if !defined(__FreeBSD__)
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vn_pager_sync(vp, ap->a_waitfor);
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#endif
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/*
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* Flush all dirty buffers associated with a vnode.
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*/
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ext2_discard_prealloc(VTOI(vp));
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loop:
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s = splbio();
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for (bp = vp->v_dirtyblkhd.lh_first; bp; bp = nbp) {
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nbp = bp->b_vnbufs.le_next;
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if ((bp->b_flags & B_BUSY))
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continue;
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if ((bp->b_flags & B_DELWRI) == 0)
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panic("ext2_fsync: not dirty");
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bremfree(bp);
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bp->b_flags |= B_BUSY;
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splx(s);
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/*
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* Wait for I/O associated with indirect blocks to complete,
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* since there is no way to quickly wait for them below.
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*/
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if (bp->b_vp == vp || ap->a_waitfor == MNT_NOWAIT)
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(void) bawrite(bp);
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else
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(void) bwrite(bp);
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goto loop;
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}
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if (ap->a_waitfor == MNT_WAIT) {
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while (vp->v_numoutput) {
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vp->v_flag |= VBWAIT;
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#if !defined(__FreeBSD__)
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sleep((caddr_t)&vp->v_numoutput, PRIBIO + 1);
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#else
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tsleep((caddr_t)&vp->v_numoutput, PRIBIO + 1, "extfsn", 0);
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#endif
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}
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#if DIAGNOSTIC
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if (vp->v_dirtyblkhd.lh_first) {
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vprint("ext2_fsync: dirty", vp);
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goto loop;
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}
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#endif
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}
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splx(s);
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#if defined(__FreeBSD__)
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tv = time;
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#else
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get_time(&tv);
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#endif
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return (VOP_UPDATE(ap->a_vp, &tv, &tv, ap->a_waitfor == MNT_WAIT));
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}
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