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 * $DragonFly: src/sys/vfs/ufs/ffs_vnops.c,v 1.19 2007/11/06 03:50:02 dillon Exp $ 36 */ 37 38 #include <sys/param.h> 39 #include <sys/systm.h> 40 #include <sys/resourcevar.h> 41 #include <sys/signalvar.h> 42 #include <sys/kernel.h> 43 #include <sys/stat.h> 44 #include <sys/buf.h> 45 #include <sys/proc.h> 46 #include <sys/mount.h> 47 #include <sys/vnode.h> 48 #include <sys/conf.h> 49 50 #include <machine/limits.h> 51 52 #include <vm/vm.h> 53 #include <vm/vm_page.h> 54 #include <vm/vm_object.h> 55 #include <vm/vm_extern.h> 56 57 #include <sys/buf2.h> 58 59 #include "quota.h" 60 #include "inode.h" 61 #include "ufsmount.h" 62 #include "ufs_extern.h" 63 64 #include "fs.h" 65 #include "ffs_extern.h" 66 67 static int ffs_fsync (struct vop_fsync_args *); 68 static int ffs_getpages (struct vop_getpages_args *); 69 static int ffs_read (struct vop_read_args *); 70 static int ffs_write (struct vop_write_args *); 71 72 /* Global vfs data structures for ufs. */ 73 struct vop_ops ffs_vnode_vops = { 74 .vop_default = ufs_vnoperate, 75 .vop_fsync = ffs_fsync, 76 .vop_getpages = ffs_getpages, 77 .vop_putpages = vop_stdputpages, 78 .vop_read = ffs_read, 79 .vop_balloc = ffs_balloc, 80 .vop_reallocblks = ffs_reallocblks, 81 .vop_write = ffs_write 82 }; 83 84 struct vop_ops ffs_spec_vops = { 85 .vop_default = ufs_vnoperatespec, 86 .vop_fsync = ffs_fsync 87 }; 88 89 struct vop_ops ffs_fifo_vops = { 90 .vop_default = ufs_vnoperatefifo, 91 .vop_fsync = ffs_fsync 92 }; 93 94 #include "ufs_readwrite.c" 95 96 /* 97 * Synch an open file. 98 * 99 * ffs_fsync(struct vnode *a_vp, struct ucred *a_cred, int a_waitfor, 100 * struct proc *a_p) 101 */ 102 103 static int ffs_checkdeferred(struct buf *bp); 104 105 /* ARGSUSED */ 106 static int 107 ffs_fsync(struct vop_fsync_args *ap) 108 { 109 struct vnode *vp = ap->a_vp; 110 off_t loffset; 111 int error; 112 113 if (vn_isdisk(vp, NULL)) { 114 loffset = LLONG_MAX; 115 if (vp->v_rdev && vp->v_rdev->si_mountpoint != NULL && 116 (vp->v_rdev->si_mountpoint->mnt_flag & MNT_SOFTDEP)) 117 softdep_fsync_mountdev(vp); 118 } else { 119 struct inode *ip; 120 ip = VTOI(vp); 121 loffset = ip->i_size; 122 } 123 124 /* 125 * Flush all dirty buffers associated with a vnode. 126 */ 127 error = vfsync(vp, ap->a_waitfor, NIADDR + 1, ffs_checkdeferred, 128 softdep_sync_metadata); 129 if (error == 0) 130 error = ffs_update(vp, (ap->a_waitfor == MNT_WAIT)); 131 return (error); 132 } 133 134 static int 135 ffs_checkdeferred(struct buf *bp) 136 { 137 if (LIST_FIRST(&bp->b_dep) != NULL && 138 (bp->b_flags & B_DEFERRED) == 0 && 139 buf_countdeps(bp, 0)) { 140 bp->b_flags |= B_DEFERRED; 141 return(1); 142 } 143 return(0); 144 } 145 146