1 /* 2 * Copyright (c) 1982, 1986, 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)ffs_vnops.c 8.15 (Berkeley) 5/14/95 34 * $FreeBSD: src/sys/ufs/ffs/ffs_vnops.c,v 1.64 2000/01/10 12:04:25 phk Exp $ 35 */ 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/resourcevar.h> 40 #include <sys/signalvar.h> 41 #include <sys/kernel.h> 42 #include <sys/stat.h> 43 #include <sys/buf.h> 44 #include <sys/proc.h> 45 #include <sys/mount.h> 46 #include <sys/vnode.h> 47 #include <sys/conf.h> 48 49 #include <machine/limits.h> 50 51 #include <vm/vm.h> 52 #include <vm/vm_page.h> 53 #include <vm/vm_object.h> 54 #include <vm/vm_extern.h> 55 56 #include <sys/buf2.h> 57 58 #include "quota.h" 59 #include "inode.h" 60 #include "ufsmount.h" 61 #include "ufs_extern.h" 62 63 #include "fs.h" 64 #include "ffs_extern.h" 65 66 static int ffs_fsync (struct vop_fsync_args *); 67 static int ffs_read (struct vop_read_args *); 68 static int ffs_write (struct vop_write_args *); 69 70 /* Global vfs data structures for ufs. */ 71 struct vop_ops ffs_vnode_vops = { 72 .vop_default = ufs_vnoperate, 73 .vop_fsync = ffs_fsync, 74 .vop_getpages = vop_stdgetpages, 75 .vop_putpages = vop_stdputpages, 76 .vop_read = ffs_read, 77 .vop_balloc = ffs_balloc, 78 .vop_reallocblks = ffs_reallocblks, 79 .vop_write = ffs_write 80 }; 81 82 struct vop_ops ffs_spec_vops = { 83 .vop_default = ufs_vnoperatespec, 84 .vop_fsync = ffs_fsync 85 }; 86 87 struct vop_ops ffs_fifo_vops = { 88 .vop_default = ufs_vnoperatefifo, 89 .vop_fsync = ffs_fsync 90 }; 91 92 #include "ufs_readwrite.c" 93 94 /* 95 * Synch an open file. 96 * 97 * ffs_fsync(struct vnode *a_vp, struct ucred *a_cred, int a_waitfor, 98 * struct proc *a_p) 99 */ 100 101 static int ffs_checkdeferred(struct buf *bp); 102 103 /* ARGSUSED */ 104 static int 105 ffs_fsync(struct vop_fsync_args *ap) 106 { 107 struct vnode *vp = ap->a_vp; 108 int error; 109 110 if (vn_isdisk(vp, NULL)) { 111 if (vp->v_rdev && vp->v_rdev->si_mountpoint != NULL && 112 (vp->v_rdev->si_mountpoint->mnt_flag & MNT_SOFTDEP)) 113 softdep_fsync_mountdev(vp); 114 } else { 115 struct inode *ip; 116 ip = VTOI(vp); 117 } 118 119 /* 120 * Flush all dirty buffers associated with a vnode. 121 */ 122 error = vfsync(vp, ap->a_waitfor, NIADDR + 1, ffs_checkdeferred, 123 softdep_sync_metadata); 124 if (error == 0) 125 error = ffs_update(vp, (ap->a_waitfor == MNT_WAIT)); 126 return (error); 127 } 128 129 static int 130 ffs_checkdeferred(struct buf *bp) 131 { 132 if (LIST_FIRST(&bp->b_dep) != NULL && 133 (bp->b_flags & B_DEFERRED) == 0 && 134 buf_countdeps(bp, 0)) { 135 bp->b_flags |= B_DEFERRED; 136 return(1); 137 } 138 return(0); 139 } 140 141