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
ffs_fsync(struct vop_fsync_args * ap)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
ffs_checkdeferred(struct buf * bp)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