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3c81694426
form `tv = time'. Use a new function gettime(). The current version just forces atomicicity without fixing precision or efficiency bugs. Simplified some related valid accesses by using the central function.
348 lines
14 KiB
C
348 lines
14 KiB
C
/*
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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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* @(#)ffs_vnops.c 8.15 (Berkeley) 5/14/95
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* $Id: ffs_vnops.c,v 1.24 1997/03/04 18:35:15 bde Exp $
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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/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 <sys/lockf.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/ffs/fs.h>
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#include <ufs/ffs/ffs_extern.h>
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static int ffs_fsync __P((struct vop_fsync_args *));
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static int ffs_getpages __P((struct vop_getpages_args *));
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static int ffs_read __P((struct vop_read_args *));
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static int ffs_write __P((struct vop_write_args *));
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/* Global vfs data structures for ufs. */
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vop_t **ffs_vnodeop_p;
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static struct vnodeopv_entry_desc ffs_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_whiteout_desc, (vop_t *)ufs_whiteout }, /* whiteout */
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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 *)ufs_close }, /* close */
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{ &vop_access_desc, (vop_t *)ufs_access }, /* access */
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{ &vop_getattr_desc, (vop_t *)ufs_getattr }, /* getattr */
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{ &vop_setattr_desc, (vop_t *)ufs_setattr }, /* setattr */
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{ &vop_read_desc, (vop_t *)ffs_read }, /* read */
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{ &vop_write_desc, (vop_t *)ffs_write }, /* write */
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{ &vop_lease_desc, (vop_t *)ufs_lease_check }, /* lease */
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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_revoke_desc, (vop_t *)ufs_revoke }, /* revoke */
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{ &vop_mmap_desc, (vop_t *)ufs_mmap }, /* mmap */
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{ &vop_fsync_desc, (vop_t *)ffs_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 *)ufs_inactive }, /* inactive */
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{ &vop_reclaim_desc, (vop_t *)ffs_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 *)ffs_blkatoff }, /* blkatoff */
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{ &vop_valloc_desc, (vop_t *)ffs_valloc }, /* valloc */
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{ &vop_reallocblks_desc, (vop_t *)ffs_reallocblks }, /* reallocblks */
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{ &vop_vfree_desc, (vop_t *)ffs_vfree }, /* vfree */
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{ &vop_truncate_desc, (vop_t *)ffs_truncate }, /* truncate */
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{ &vop_update_desc, (vop_t *)ffs_update }, /* update */
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{ &vop_getpages_desc, (vop_t *)ffs_getpages}, /* getpages */
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{ &vop_bwrite_desc, (vop_t *)vn_bwrite }, /* bwrite */
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{ NULL, NULL }
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};
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static struct vnodeopv_desc ffs_vnodeop_opv_desc =
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{ &ffs_vnodeop_p, ffs_vnodeop_entries };
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vop_t **ffs_specop_p;
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static struct vnodeopv_entry_desc ffs_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 *)ufs_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_lease_desc, (vop_t *)spec_lease_check }, /* lease */
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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_revoke_desc, (vop_t *)spec_revoke }, /* revoke */
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{ &vop_mmap_desc, (vop_t *)spec_mmap }, /* mmap */
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{ &vop_fsync_desc, (vop_t *)ffs_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 *)ufs_inactive }, /* inactive */
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{ &vop_reclaim_desc, (vop_t *)ffs_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_reallocblks_desc, (vop_t *)spec_reallocblks }, /* reallocblks */
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{ &vop_vfree_desc, (vop_t *)ffs_vfree }, /* vfree */
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{ &vop_truncate_desc, (vop_t *)spec_truncate }, /* truncate */
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{ &vop_update_desc, (vop_t *)ffs_update }, /* update */
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{ &vop_getpages_desc, (vop_t *)spec_getpages}, /* getpages */
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{ &vop_bwrite_desc, (vop_t *)vn_bwrite }, /* bwrite */
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{ NULL, NULL }
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};
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static struct vnodeopv_desc ffs_specop_opv_desc =
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{ &ffs_specop_p, ffs_specop_entries };
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vop_t **ffs_fifoop_p;
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static struct vnodeopv_entry_desc ffs_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 *)ufs_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_lease_desc, (vop_t *)fifo_lease_check }, /* lease */
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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_revoke_desc, (vop_t *)fifo_revoke }, /* revoke */
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{ &vop_mmap_desc, (vop_t *)fifo_mmap }, /* mmap */
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{ &vop_fsync_desc, (vop_t *)ffs_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 *)ufs_inactive }, /* inactive */
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{ &vop_reclaim_desc, (vop_t *)ffs_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_reallocblks_desc, (vop_t *)fifo_reallocblks }, /* reallocblks */
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{ &vop_vfree_desc, (vop_t *)ffs_vfree }, /* vfree */
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{ &vop_truncate_desc, (vop_t *)fifo_truncate }, /* truncate */
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{ &vop_update_desc, (vop_t *)ffs_update }, /* update */
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{ &vop_bwrite_desc, (vop_t *)vn_bwrite }, /* bwrite */
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{ NULL, NULL }
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};
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static struct vnodeopv_desc ffs_fifoop_opv_desc =
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{ &ffs_fifoop_p, ffs_fifoop_entries };
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VNODEOP_SET(ffs_vnodeop_opv_desc);
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VNODEOP_SET(ffs_specop_opv_desc);
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VNODEOP_SET(ffs_fifoop_opv_desc);
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/*
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* Enabling cluster read/write operations.
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*/
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int doclusterread = 1;
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int doclusterwrite = 1;
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#include <sys/sysctl.h>
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SYSCTL_NODE(_vfs, MOUNT_UFS, ffs, CTLFLAG_RW, 0, "FFS filesystem");
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SYSCTL_INT(_vfs_ffs, FFS_CLUSTERREAD, doclusterread, CTLFLAG_RW, &doclusterread, 0, "");
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SYSCTL_INT(_vfs_ffs, FFS_CLUSTERWRITE, doclusterwrite, CTLFLAG_RW, &doclusterwrite, 0, "");
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#include <ufs/ufs/ufs_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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static int
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ffs_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 pass;
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int s;
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pass = 0;
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/*
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* Flush all dirty buffers associated with a vnode.
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*/
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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) || (pass == 0 && (bp->b_blkno < 0)))
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continue;
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if ((bp->b_flags & B_DELWRI) == 0)
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panic("ffs_fsync: not dirty");
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if (bp->b_vp != vp || ap->a_waitfor != MNT_NOWAIT) {
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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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} else {
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vfs_bio_awrite(bp);
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splx(s);
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}
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goto loop;
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}
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splx(s);
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if (pass == 0) {
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pass = 1;
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goto loop;
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}
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if (ap->a_waitfor == MNT_WAIT) {
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s = splbio();
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while (vp->v_numoutput) {
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vp->v_flag |= VBWAIT;
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(void) tsleep((caddr_t)&vp->v_numoutput, PRIBIO + 1, "ffsfsn", 0);
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}
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splx(s);
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#ifdef DIAGNOSTIC
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if (vp->v_dirtyblkhd.lh_first) {
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vprint("ffs_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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gettime(&tv);
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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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/*
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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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ffs_reclaim(ap)
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struct vop_reclaim_args /* {
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struct vnode *a_vp;
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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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int error;
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if (error = ufs_reclaim(vp, ap->a_p))
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return (error);
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FREE(vp->v_data, VFSTOUFS(vp->v_mount)->um_devvp->v_tag == VT_MFS ?
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M_MFSNODE : M_FFSNODE);
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vp->v_data = NULL;
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return (0);
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}
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