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 1.17 2006/07/18 22:22:16 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_putpages (struct vop_putpages_args *); 70 static int ffs_read (struct vop_read_args *); 71 static int ffs_write (struct vop_write_args *); 72 73 /* Global vfs data structures for ufs. */ 74 struct vop_ops ffs_vnode_vops = { 75 .vop_default = ufs_vnoperate, 76 .vop_fsync = ffs_fsync, 77 .vop_getpages = ffs_getpages, 78 .vop_putpages = ffs_putpages, 79 .vop_read = ffs_read, 80 .vop_balloc = ffs_balloc, 81 .vop_reallocblks = ffs_reallocblks, 82 .vop_write = ffs_write 83 }; 84 85 struct vop_ops ffs_spec_vops = { 86 .vop_default = ufs_vnoperatespec, 87 .vop_fsync = ffs_fsync 88 }; 89 90 struct vop_ops ffs_fifo_vops = { 91 .vop_default = ufs_vnoperatefifo, 92 .vop_fsync = ffs_fsync 93 }; 94 95 #include "ufs_readwrite.c" 96 97 /* 98 * Synch an open file. 99 * 100 * ffs_fsync(struct vnode *a_vp, struct ucred *a_cred, int a_waitfor, 101 * struct proc *a_p) 102 */ 103 104 static int ffs_checkdeferred(struct buf *bp); 105 106 /* ARGSUSED */ 107 static int 108 ffs_fsync(struct vop_fsync_args *ap) 109 { 110 struct vnode *vp = ap->a_vp; 111 off_t loffset; 112 int error; 113 114 if (vn_isdisk(vp, NULL)) { 115 loffset = LLONG_MAX; 116 if (vp->v_rdev && vp->v_rdev->si_mountpoint != NULL && 117 (vp->v_rdev->si_mountpoint->mnt_flag & MNT_SOFTDEP)) 118 softdep_fsync_mountdev(vp); 119 } else { 120 struct inode *ip; 121 ip = VTOI(vp); 122 loffset = ip->i_size; 123 } 124 125 /* 126 * Flush all dirty buffers associated with a vnode. 127 */ 128 error = vfsync(vp, ap->a_waitfor, NIADDR + 1, ffs_checkdeferred, 129 softdep_sync_metadata); 130 if (error == 0) 131 error = ffs_update(vp, (ap->a_waitfor == MNT_WAIT)); 132 return (error); 133 } 134 135 static int 136 ffs_checkdeferred(struct buf *bp) 137 { 138 if (LIST_FIRST(&bp->b_dep) != NULL && 139 (bp->b_flags & B_DEFERRED) == 0 && 140 bioops.io_countdeps && (*bioops.io_countdeps)(bp, 0)) { 141 bp->b_flags |= B_DEFERRED; 142 return(1); 143 } 144 return(0); 145 } 146 147