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