/* $OpenBSD: ffs_vnops.c,v 1.28 2002/11/08 04:34:18 art Exp $ */ /* $NetBSD: ffs_vnops.c,v 1.7 1996/05/11 18:27:24 mycroft Exp $ */ /* * Copyright (c) 1982, 1986, 1989, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)ffs_vnops.c 8.10 (Berkeley) 8/10/94 */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* Global vfs data structures for ufs. */ int (**ffs_vnodeop_p)(void *); struct vnodeopv_entry_desc ffs_vnodeop_entries[] = { { &vop_default_desc, vn_default_error }, { &vop_lookup_desc, ufs_lookup }, /* lookup */ { &vop_create_desc, ufs_create }, /* create */ { &vop_whiteout_desc, ufs_whiteout }, /* whiteout */ { &vop_mknod_desc, ufs_mknod }, /* mknod */ { &vop_open_desc, ufs_open }, /* open */ { &vop_close_desc, ufs_close }, /* close */ { &vop_access_desc, ufs_access }, /* access */ { &vop_getattr_desc, ufs_getattr }, /* getattr */ { &vop_setattr_desc, ufs_setattr }, /* setattr */ { &vop_read_desc, ffs_read }, /* read */ { &vop_write_desc, ffs_write }, /* write */ { &vop_lease_desc, ufs_lease_check }, /* lease */ { &vop_ioctl_desc, ufs_ioctl }, /* ioctl */ { &vop_select_desc, ufs_select }, /* select */ { &vop_kqfilter_desc, ufs_kqfilter }, /* kqfilter */ { &vop_revoke_desc, ufs_revoke }, /* revoke */ { &vop_fsync_desc, ffs_fsync }, /* fsync */ { &vop_remove_desc, ufs_remove }, /* remove */ { &vop_link_desc, ufs_link }, /* link */ { &vop_rename_desc, ufs_rename }, /* rename */ { &vop_mkdir_desc, ufs_mkdir }, /* mkdir */ { &vop_rmdir_desc, ufs_rmdir }, /* rmdir */ { &vop_symlink_desc, ufs_symlink }, /* symlink */ { &vop_readdir_desc, ufs_readdir }, /* readdir */ { &vop_readlink_desc, ufs_readlink }, /* readlink */ { &vop_abortop_desc, vop_generic_abortop }, /* abortop */ { &vop_inactive_desc, ufs_inactive }, /* inactive */ { &vop_reclaim_desc, ffs_reclaim }, /* reclaim */ { &vop_lock_desc, ufs_lock }, /* lock */ { &vop_unlock_desc, ufs_unlock }, /* unlock */ { &vop_bmap_desc, ufs_bmap }, /* bmap */ { &vop_strategy_desc, ufs_strategy }, /* strategy */ { &vop_print_desc, ufs_print }, /* print */ { &vop_islocked_desc, ufs_islocked }, /* islocked */ { &vop_pathconf_desc, ufs_pathconf }, /* pathconf */ { &vop_advlock_desc, ufs_advlock }, /* advlock */ { &vop_reallocblks_desc, ffs_reallocblks }, /* reallocblks */ { &vop_bwrite_desc, vop_generic_bwrite }, #ifdef UFS_EXTATTR { &vop_getextattr_desc, ufs_vop_getextattr }, { &vop_setextattr_desc, ufs_vop_setextattr }, #endif { NULL, NULL } }; struct vnodeopv_desc ffs_vnodeop_opv_desc = { &ffs_vnodeop_p, ffs_vnodeop_entries }; int (**ffs_specop_p)(void *); struct vnodeopv_entry_desc ffs_specop_entries[] = { { &vop_default_desc, spec_vnoperate }, { &vop_close_desc, ufsspec_close }, /* close */ { &vop_access_desc, ufs_access }, /* access */ { &vop_getattr_desc, ufs_getattr }, /* getattr */ { &vop_setattr_desc, ufs_setattr }, /* setattr */ { &vop_read_desc, ufsspec_read }, /* read */ { &vop_write_desc, ufsspec_write }, /* write */ { &vop_fsync_desc, ffs_fsync }, /* fsync */ { &vop_inactive_desc, ufs_inactive }, /* inactive */ { &vop_reclaim_desc, ffs_reclaim }, /* reclaim */ { &vop_lock_desc, ufs_lock }, /* lock */ { &vop_unlock_desc, ufs_unlock }, /* unlock */ { &vop_print_desc, ufs_print }, /* print */ { &vop_islocked_desc, ufs_islocked }, /* islocked */ #ifdef UFS_EXTATTR { &vop_getextattr_desc, ufs_vop_getextattr }, { &vop_setextattr_desc, ufs_vop_setextattr }, #endif { NULL, NULL } }; struct vnodeopv_desc ffs_specop_opv_desc = { &ffs_specop_p, ffs_specop_entries }; #ifdef FIFO int (**ffs_fifoop_p)(void *); struct vnodeopv_entry_desc ffs_fifoop_entries[] = { { &vop_default_desc, fifo_vnoperate }, { &vop_close_desc, ufsfifo_close }, /* close */ { &vop_access_desc, ufs_access }, /* access */ { &vop_getattr_desc, ufs_getattr }, /* getattr */ { &vop_setattr_desc, ufs_setattr }, /* setattr */ { &vop_read_desc, ufsfifo_read }, /* read */ { &vop_write_desc, ufsfifo_write }, /* write */ { &vop_fsync_desc, ffs_fsync }, /* fsync */ { &vop_inactive_desc, ufs_inactive }, /* inactive */ { &vop_reclaim_desc, ffs_reclaim }, /* reclaim */ { &vop_lock_desc, ufs_lock }, /* lock */ { &vop_unlock_desc, ufs_unlock }, /* unlock */ { &vop_print_desc, ufs_print }, /* print */ { &vop_islocked_desc, ufs_islocked }, /* islocked */ { &vop_bwrite_desc, vop_generic_bwrite }, #ifdef UFS_EXTATTR { &vop_getextattr_desc, ufs_vop_getextattr }, { &vop_setextattr_desc, ufs_vop_setextattr }, #endif { NULL, NULL } }; struct vnodeopv_desc ffs_fifoop_opv_desc = { &ffs_fifoop_p, ffs_fifoop_entries }; #endif /* FIFO */ /* * Enabling cluster read/write operations. */ int doclusterread = 1; int doclusterwrite = 1; #include /* * Synch an open file. */ /* ARGSUSED */ int ffs_fsync(v) void *v; { struct vop_fsync_args /* { struct vnode *a_vp; struct ucred *a_cred; int a_waitfor; struct proc *a_p; } */ *ap = v; struct vnode *vp = ap->a_vp; struct buf *bp, *nbp; int s, error, passes, skipmeta; if (vp->v_type == VBLK && vp->v_specmountpoint != NULL && (vp->v_specmountpoint->mnt_flag & MNT_SOFTDEP)) softdep_fsync_mountdev(vp); /* * Flush all dirty buffers associated with a vnode. */ passes = NIADDR + 1; skipmeta = 0; if (ap->a_waitfor == MNT_WAIT) skipmeta = 1; s = splbio(); loop: for (bp = LIST_FIRST(&vp->v_dirtyblkhd); bp; bp = LIST_NEXT(bp, b_vnbufs)) bp->b_flags &= ~B_SCANNED; for (bp = LIST_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) { nbp = LIST_NEXT(bp, b_vnbufs); /* * Reasons to skip this buffer: it has already been considered * on this pass, this pass is the first time through on a * synchronous flush request and the buffer being considered * is metadata, the buffer has dependencies that will cause * it to be redirtied and it has not already been deferred, * or it is already being written. */ if (bp->b_flags & (B_BUSY | B_SCANNED)) continue; if ((bp->b_flags & B_DELWRI) == 0) panic("ffs_fsync: not dirty"); if (skipmeta && bp->b_lblkno < 0) continue; if (ap->a_waitfor != MNT_WAIT && LIST_FIRST(&bp->b_dep) != NULL && (bp->b_flags & B_DEFERRED) == 0 && buf_countdeps(bp, 0, 1)) { bp->b_flags |= B_DEFERRED; continue; } bremfree(bp); bp->b_flags |= B_BUSY | B_SCANNED; splx(s); /* * On our final pass through, do all I/O synchronously * so that we can find out if our flush is failing * because of write errors. */ if (passes > 0 || ap->a_waitfor != MNT_WAIT) (void) bawrite(bp); else if ((error = bwrite(bp)) != 0) return (error); s = splbio(); /* * Since we may have slept during the I/O, we need * to start from a known point. */ nbp = LIST_FIRST(&vp->v_dirtyblkhd); } if (skipmeta) { skipmeta = 0; goto loop; } if (ap->a_waitfor == MNT_WAIT) { vwaitforio(vp, 0, "ffs_fsync", 0); /* * Ensure that any filesystem metadata associated * with the vnode has been written. */ splx(s); 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 -= 1; goto loop; } #ifdef DIAGNOSTIC if (vp->v_type != VBLK) vprint("ffs_fsync: dirty", vp); #endif } } splx(s); return (UFS_UPDATE(VTOI(vp), ap->a_waitfor == MNT_WAIT)); } /* * 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; sturct proc *a_p; } */ *ap = v; register struct vnode *vp = ap->a_vp; int error; if ((error = ufs_reclaim(vp, ap->a_p)) != 0) return (error); /* XXX - same for for both mfs and ffs */ pool_put(&ffs_ino_pool, vp->v_data); vp->v_data = NULL; return (0); }