592 lines
18 KiB
C
592 lines
18 KiB
C
/* $NetBSD: ffs_vnops.c,v 1.60 2003/08/07 16:34:32 agc Exp $ */
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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. 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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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: ffs_vnops.c,v 1.60 2003/08/07 16:34:32 agc Exp $");
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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/event.h>
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#include <sys/proc.h>
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#include <sys/mount.h>
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#include <sys/vnode.h>
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#include <sys/pool.h>
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#include <sys/signalvar.h>
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#include <miscfs/fifofs/fifo.h>
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#include <miscfs/genfs/genfs.h>
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#include <miscfs/specfs/specdev.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 <ufs/ufs/ufsmount.h>
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#include <ufs/ffs/fs.h>
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#include <ufs/ffs/ffs_extern.h>
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#include <uvm/uvm.h>
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static int ffs_full_fsync __P((void *));
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/* Global vfs data structures for ufs. */
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int (**ffs_vnodeop_p) __P((void *));
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const struct vnodeopv_entry_desc ffs_vnodeop_entries[] = {
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{ &vop_default_desc, vn_default_error },
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{ &vop_lookup_desc, ufs_lookup }, /* lookup */
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{ &vop_create_desc, ufs_create }, /* create */
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{ &vop_whiteout_desc, ufs_whiteout }, /* whiteout */
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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, ffs_read }, /* read */
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{ &vop_write_desc, ffs_write }, /* write */
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{ &vop_lease_desc, ufs_lease_check }, /* lease */
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{ &vop_ioctl_desc, ufs_ioctl }, /* ioctl */
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{ &vop_fcntl_desc, ufs_fcntl }, /* fcntl */
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{ &vop_poll_desc, ufs_poll }, /* poll */
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{ &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */
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{ &vop_revoke_desc, ufs_revoke }, /* revoke */
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{ &vop_mmap_desc, ufs_mmap }, /* mmap */
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{ &vop_fsync_desc, ffs_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, ufs_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, ufs_inactive }, /* inactive */
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{ &vop_reclaim_desc, ffs_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, ffs_blkatoff }, /* blkatoff */
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{ &vop_valloc_desc, ffs_valloc }, /* valloc */
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{ &vop_balloc_desc, ffs_balloc }, /* balloc */
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{ &vop_reallocblks_desc, ffs_reallocblks }, /* reallocblks */
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{ &vop_vfree_desc, ffs_vfree }, /* vfree */
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{ &vop_truncate_desc, ffs_truncate }, /* truncate */
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{ &vop_update_desc, ffs_update }, /* update */
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{ &vop_bwrite_desc, vn_bwrite }, /* bwrite */
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{ &vop_getpages_desc, ffs_getpages }, /* getpages */
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{ &vop_putpages_desc, ffs_putpages }, /* putpages */
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{ NULL, NULL }
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};
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const struct vnodeopv_desc ffs_vnodeop_opv_desc =
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{ &ffs_vnodeop_p, ffs_vnodeop_entries };
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int (**ffs_specop_p) __P((void *));
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const struct vnodeopv_entry_desc ffs_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_lease_desc, spec_lease_check }, /* lease */
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{ &vop_ioctl_desc, spec_ioctl }, /* ioctl */
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{ &vop_fcntl_desc, ufs_fcntl }, /* fcntl */
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{ &vop_poll_desc, spec_poll }, /* poll */
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{ &vop_kqfilter_desc, spec_kqfilter }, /* kqfilter */
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{ &vop_revoke_desc, spec_revoke }, /* revoke */
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{ &vop_mmap_desc, spec_mmap }, /* mmap */
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{ &vop_fsync_desc, ffs_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, ufs_inactive }, /* inactive */
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{ &vop_reclaim_desc, ffs_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, ffs_vfree }, /* vfree */
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{ &vop_truncate_desc, spec_truncate }, /* truncate */
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{ &vop_update_desc, ffs_update }, /* update */
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{ &vop_bwrite_desc, vn_bwrite }, /* bwrite */
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{ &vop_getpages_desc, spec_getpages }, /* getpages */
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{ &vop_putpages_desc, spec_putpages }, /* putpages */
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{ NULL, NULL }
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};
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const struct vnodeopv_desc ffs_specop_opv_desc =
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{ &ffs_specop_p, ffs_specop_entries };
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int (**ffs_fifoop_p) __P((void *));
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const struct vnodeopv_entry_desc ffs_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_lease_desc, fifo_lease_check }, /* lease */
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{ &vop_ioctl_desc, fifo_ioctl }, /* ioctl */
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{ &vop_fcntl_desc, ufs_fcntl }, /* fcntl */
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{ &vop_poll_desc, fifo_poll }, /* poll */
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{ &vop_kqfilter_desc, fifo_kqfilter }, /* kqfilter */
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{ &vop_revoke_desc, fifo_revoke }, /* revoke */
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{ &vop_mmap_desc, fifo_mmap }, /* mmap */
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{ &vop_fsync_desc, ffs_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, ufs_inactive }, /* inactive */
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{ &vop_reclaim_desc, ffs_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, ffs_vfree }, /* vfree */
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{ &vop_truncate_desc, fifo_truncate }, /* truncate */
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{ &vop_update_desc, ffs_update }, /* update */
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{ &vop_bwrite_desc, vn_bwrite }, /* bwrite */
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{ &vop_putpages_desc, fifo_putpages }, /* putpages */
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{ NULL, NULL }
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};
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const struct vnodeopv_desc ffs_fifoop_opv_desc =
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{ &ffs_fifoop_p, ffs_fifoop_entries };
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#include <ufs/ufs/ufs_readwrite.c>
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int
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ffs_fsync(v)
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void *v;
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{
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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_flags;
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off_t a_offlo;
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off_t a_offhi;
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struct proc *a_p;
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} */ *ap = v;
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struct buf *bp;
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int s, num, error, i;
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struct indir ia[NIADDR + 1];
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int bsize;
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daddr_t blk_high;
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struct vnode *vp;
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/*
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* XXX no easy way to sync a range in a file with softdep.
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*/
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if ((ap->a_offlo == 0 && ap->a_offhi == 0) || DOINGSOFTDEP(ap->a_vp))
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return ffs_full_fsync(v);
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vp = ap->a_vp;
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bsize = ap->a_vp->v_mount->mnt_stat.f_iosize;
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blk_high = ap->a_offhi / bsize;
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if (ap->a_offhi % bsize != 0)
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blk_high++;
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/*
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* First, flush all pages in range.
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*/
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if (vp->v_type == VREG) {
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simple_lock(&vp->v_interlock);
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error = VOP_PUTPAGES(vp, trunc_page(ap->a_offlo),
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round_page(ap->a_offhi), PGO_CLEANIT|PGO_SYNCIO);
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if (error) {
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return error;
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}
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}
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/*
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* Then, flush indirect blocks.
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*/
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s = splbio();
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if (!(ap->a_flags & FSYNC_DATAONLY) && blk_high >= NDADDR) {
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error = ufs_getlbns(vp, blk_high, ia, &num);
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if (error) {
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splx(s);
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return error;
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}
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for (i = 0; i < num; i++) {
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bp = incore(vp, ia[i].in_lbn);
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if (bp != NULL && !(bp->b_flags & B_BUSY) &&
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(bp->b_flags & B_DELWRI)) {
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bp->b_flags |= B_BUSY | B_VFLUSH;
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splx(s);
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bawrite(bp);
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s = splbio();
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}
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}
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}
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if (ap->a_flags & FSYNC_WAIT) {
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simple_lock(&global_v_numoutput_slock);
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while (vp->v_numoutput > 0) {
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vp->v_flag |= VBWAIT;
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ltsleep(&vp->v_numoutput, PRIBIO + 1, "fsync_range", 0,
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&global_v_numoutput_slock);
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}
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simple_unlock(&global_v_numoutput_slock);
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}
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splx(s);
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return (VOP_UPDATE(vp, NULL, NULL,
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(ap->a_flags & FSYNC_WAIT) ? UPDATE_WAIT : 0));
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}
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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_full_fsync(v)
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void *v;
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{
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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_flags;
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off_t a_offlo;
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off_t a_offhi;
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struct proc *a_p;
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} */ *ap = v;
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struct vnode *vp = ap->a_vp;
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struct buf *bp, *nbp;
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int s, error, passes, skipmeta, inodedeps_only, waitfor;
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if (vp->v_type == VBLK &&
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vp->v_specmountpoint != NULL &&
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(vp->v_specmountpoint->mnt_flag & MNT_SOFTDEP))
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softdep_fsync_mountdev(vp);
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inodedeps_only = DOINGSOFTDEP(vp) && (ap->a_flags & FSYNC_RECLAIM)
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&& vp->v_uobj.uo_npages == 0 && LIST_EMPTY(&vp->v_dirtyblkhd);
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/*
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* Flush all dirty data associated with a vnode.
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*/
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if (vp->v_type == VREG) {
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simple_lock(&vp->v_interlock);
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error = VOP_PUTPAGES(vp, 0, 0, PGO_ALLPAGES | PGO_CLEANIT |
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((ap->a_flags & FSYNC_WAIT) ? PGO_SYNCIO : 0));
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if (error) {
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return error;
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}
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}
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passes = NIADDR + 1;
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skipmeta = 0;
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if (ap->a_flags & (FSYNC_DATAONLY|FSYNC_WAIT))
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skipmeta = 1;
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s = splbio();
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loop:
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LIST_FOREACH(bp, &vp->v_dirtyblkhd, b_vnbufs)
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bp->b_flags &= ~B_SCANNED;
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for (bp = LIST_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) {
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nbp = LIST_NEXT(bp, b_vnbufs);
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if (bp->b_flags & (B_BUSY | B_SCANNED))
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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 (skipmeta && bp->b_lblkno < 0)
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continue;
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bp->b_flags |= B_BUSY | B_VFLUSH | B_SCANNED;
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splx(s);
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/*
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* On our final pass through, do all I/O synchronously
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* so that we can find out if our flush is failing
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* because of write errors.
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*/
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if (passes > 0 || !(ap->a_flags & FSYNC_WAIT))
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(void) bawrite(bp);
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else if ((error = bwrite(bp)) != 0)
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return (error);
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s = splbio();
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/*
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* Since we may have slept during the I/O, we need
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* to start from a known point.
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*/
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nbp = LIST_FIRST(&vp->v_dirtyblkhd);
|
|
}
|
|
if (skipmeta && !(ap->a_flags & FSYNC_DATAONLY)) {
|
|
skipmeta = 0;
|
|
goto loop;
|
|
}
|
|
if (ap->a_flags & FSYNC_WAIT) {
|
|
simple_lock(&global_v_numoutput_slock);
|
|
while (vp->v_numoutput) {
|
|
vp->v_flag |= VBWAIT;
|
|
(void) ltsleep(&vp->v_numoutput, PRIBIO + 1,
|
|
"ffsfsync", 0, &global_v_numoutput_slock);
|
|
}
|
|
simple_unlock(&global_v_numoutput_slock);
|
|
splx(s);
|
|
|
|
if (ap->a_flags & FSYNC_DATAONLY)
|
|
return (0);
|
|
|
|
/*
|
|
* Ensure that any filesystem metadata associated
|
|
* with the vnode has been written.
|
|
*/
|
|
if ((error = softdep_sync_metadata(ap)) != 0)
|
|
return (error);
|
|
|
|
s = splbio();
|
|
if (!LIST_EMPTY(&vp->v_dirtyblkhd)) {
|
|
/*
|
|
* Block devices associated with filesystems may
|
|
* have new I/O requests posted for them even if
|
|
* the vnode is locked, so no amount of trying will
|
|
* get them clean. Thus we give block devices a
|
|
* good effort, then just give up. For all other file
|
|
* types, go around and try again until it is clean.
|
|
*/
|
|
if (passes > 0) {
|
|
passes--;
|
|
goto loop;
|
|
}
|
|
#ifdef DIAGNOSTIC
|
|
if (vp->v_type != VBLK)
|
|
vprint("ffs_fsync: dirty", vp);
|
|
#endif
|
|
}
|
|
}
|
|
splx(s);
|
|
|
|
if (inodedeps_only)
|
|
waitfor = 0;
|
|
else
|
|
waitfor = (ap->a_flags & FSYNC_WAIT) ? UPDATE_WAIT : 0;
|
|
return (VOP_UPDATE(vp, NULL, NULL, waitfor));
|
|
}
|
|
|
|
/*
|
|
* Reclaim an inode so that it can be used for other purposes.
|
|
*/
|
|
int
|
|
ffs_reclaim(v)
|
|
void *v;
|
|
{
|
|
struct vop_reclaim_args /* {
|
|
struct vnode *a_vp;
|
|
struct proc *a_p;
|
|
} */ *ap = v;
|
|
struct vnode *vp = ap->a_vp;
|
|
struct inode *ip = VTOI(vp);
|
|
struct ufsmount *ump = ip->i_ump;
|
|
int error;
|
|
|
|
if ((error = ufs_reclaim(vp, ap->a_p)) != 0)
|
|
return (error);
|
|
if (ip->i_din.ffs1_din != NULL) {
|
|
if (ump->um_fstype == UFS1)
|
|
pool_put(&ffs_dinode1_pool, ip->i_din.ffs1_din);
|
|
else
|
|
pool_put(&ffs_dinode2_pool, ip->i_din.ffs2_din);
|
|
}
|
|
/*
|
|
* XXX MFS ends up here, too, to free an inode. Should we create
|
|
* XXX a separate pool for MFS inodes?
|
|
*/
|
|
pool_put(&ffs_inode_pool, vp->v_data);
|
|
vp->v_data = NULL;
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
ffs_getpages(void *v)
|
|
{
|
|
struct vop_getpages_args /* {
|
|
struct vnode *a_vp;
|
|
voff_t a_offset;
|
|
struct vm_page **a_m;
|
|
int *a_count;
|
|
int a_centeridx;
|
|
vm_prot_t a_access_type;
|
|
int a_advice;
|
|
int a_flags;
|
|
} */ *ap = v;
|
|
struct vnode *vp = ap->a_vp;
|
|
struct inode *ip = VTOI(vp);
|
|
struct fs *fs = ip->i_fs;
|
|
|
|
/*
|
|
* don't allow a softdep write to create pages for only part of a block.
|
|
* the dependency tracking requires that all pages be in memory for
|
|
* a block involved in a dependency.
|
|
*/
|
|
|
|
if (ap->a_flags & PGO_OVERWRITE &&
|
|
(blkoff(fs, ap->a_offset) != 0 ||
|
|
blkoff(fs, *ap->a_count << PAGE_SHIFT) != 0) &&
|
|
DOINGSOFTDEP(ap->a_vp)) {
|
|
if ((ap->a_flags & PGO_LOCKED) == 0) {
|
|
simple_unlock(&vp->v_interlock);
|
|
}
|
|
return EINVAL;
|
|
}
|
|
return genfs_getpages(v);
|
|
}
|
|
|
|
int
|
|
ffs_putpages(void *v)
|
|
{
|
|
struct vop_putpages_args /* {
|
|
struct vnode *a_vp;
|
|
voff_t a_offlo;
|
|
voff_t a_offhi;
|
|
int a_flags;
|
|
} */ *ap = v;
|
|
struct vnode *vp = ap->a_vp;
|
|
struct uvm_object *uobj = &vp->v_uobj;
|
|
struct inode *ip = VTOI(vp);
|
|
struct fs *fs = ip->i_fs;
|
|
struct vm_page *pg;
|
|
off_t off;
|
|
|
|
if (!DOINGSOFTDEP(vp) || (ap->a_flags & PGO_CLEANIT) == 0) {
|
|
return genfs_putpages(v);
|
|
}
|
|
|
|
/*
|
|
* for softdep files, force the pages in a block to be written together.
|
|
* if we're the pagedaemon and we would have to wait for other pages,
|
|
* just fail the request. the pagedaemon will pick a different page.
|
|
*/
|
|
|
|
ap->a_offlo &= ~fs->fs_qbmask;
|
|
ap->a_offhi = blkroundup(fs, ap->a_offhi);
|
|
if (curproc == uvm.pagedaemon_proc) {
|
|
for (off = ap->a_offlo; off < ap->a_offhi; off += PAGE_SIZE) {
|
|
pg = uvm_pagelookup(uobj, off);
|
|
|
|
/*
|
|
* we only have missing pages here because the
|
|
* calculation of offhi above doesn't account for
|
|
* fragments. so once we see one missing page,
|
|
* the rest should be missing as well, but we'll
|
|
* check for the rest just to be paranoid.
|
|
*/
|
|
|
|
if (pg == NULL) {
|
|
continue;
|
|
}
|
|
if (pg->flags & PG_BUSY) {
|
|
simple_unlock(&uobj->vmobjlock);
|
|
return EBUSY;
|
|
}
|
|
}
|
|
}
|
|
return genfs_putpages(v);
|
|
}
|
|
|
|
/*
|
|
* Return the last logical file offset that should be written for this file
|
|
* if we're doing a write that ends at "size".
|
|
*/
|
|
|
|
void
|
|
ffs_gop_size(struct vnode *vp, off_t size, off_t *eobp, int flags)
|
|
{
|
|
struct inode *ip = VTOI(vp);
|
|
struct fs *fs = ip->i_fs;
|
|
daddr_t olbn, nlbn;
|
|
|
|
KASSERT(flags & (GOP_SIZE_READ | GOP_SIZE_WRITE));
|
|
KASSERT((flags & (GOP_SIZE_READ | GOP_SIZE_WRITE))
|
|
!= (GOP_SIZE_READ | GOP_SIZE_WRITE));
|
|
|
|
olbn = lblkno(fs, ip->i_size);
|
|
nlbn = lblkno(fs, size);
|
|
if (nlbn < NDADDR && olbn <= nlbn) {
|
|
*eobp = fragroundup(fs, size);
|
|
} else {
|
|
*eobp = blkroundup(fs, size);
|
|
}
|
|
}
|