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 1.13 2005/04/15 19:08:32 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 vnodeopv_entry_desc ffs_vnodeop_entries[] = { 75 { &vop_default_desc, (vnodeopv_entry_t) ufs_vnoperate }, 76 { &vop_fsync_desc, (vnodeopv_entry_t) ffs_fsync }, 77 { &vop_getpages_desc, (vnodeopv_entry_t) ffs_getpages }, 78 { &vop_putpages_desc, (vnodeopv_entry_t) ffs_putpages }, 79 { &vop_read_desc, (vnodeopv_entry_t) ffs_read }, 80 { &vop_balloc_desc, (vnodeopv_entry_t) ffs_balloc }, 81 { &vop_reallocblks_desc, (vnodeopv_entry_t) ffs_reallocblks }, 82 { &vop_write_desc, (vnodeopv_entry_t) ffs_write }, 83 { NULL, NULL } 84 }; 85 86 struct vnodeopv_entry_desc ffs_specop_entries[] = { 87 { &vop_default_desc, (vnodeopv_entry_t) ufs_vnoperatespec }, 88 { &vop_fsync_desc, (vnodeopv_entry_t) ffs_fsync }, 89 { NULL, NULL } 90 }; 91 92 struct vnodeopv_entry_desc ffs_fifoop_entries[] = { 93 { &vop_default_desc, (vnodeopv_entry_t) ufs_vnoperatefifo }, 94 { &vop_fsync_desc, (vnodeopv_entry_t) ffs_fsync }, 95 { NULL, NULL } 96 }; 97 98 #include "ufs_readwrite.c" 99 100 /* 101 * Synch an open file. 102 * 103 * ffs_fsync(struct vnode *a_vp, struct ucred *a_cred, int a_waitfor, 104 * struct proc *a_p) 105 */ 106 107 static int ffs_checkdeferred(struct buf *bp); 108 109 /* ARGSUSED */ 110 static int 111 ffs_fsync(struct vop_fsync_args *ap) 112 { 113 struct vnode *vp = ap->a_vp; 114 daddr_t lbn; 115 int error; 116 117 if (vn_isdisk(vp, NULL)) { 118 lbn = INT_MAX; 119 if (vp->v_rdev && vp->v_rdev->si_mountpoint != NULL && 120 (vp->v_rdev->si_mountpoint->mnt_flag & MNT_SOFTDEP)) 121 softdep_fsync_mountdev(vp); 122 } else { 123 struct inode *ip; 124 ip = VTOI(vp); 125 lbn = lblkno(ip->i_fs, (ip->i_size + ip->i_fs->fs_bsize - 1)); 126 } 127 128 /* 129 * Flush all dirty buffers associated with a vnode. 130 */ 131 error = vfsync(vp, ap->a_waitfor, NIADDR + 1, lbn, ffs_checkdeferred, softdep_sync_metadata); 132 if (error == 0) 133 error = UFS_UPDATE(vp, (ap->a_waitfor == MNT_WAIT)); 134 return (error); 135 } 136 137 static int 138 ffs_checkdeferred(struct buf *bp) 139 { 140 if (LIST_FIRST(&bp->b_dep) != NULL && 141 (bp->b_flags & B_DEFERRED) == 0 && 142 bioops.io_countdeps && (*bioops.io_countdeps)(bp, 0)) { 143 bp->b_flags |= B_DEFERRED; 144 return(1); 145 } 146 return(0); 147 } 148 149