1 /* $NetBSD: genfs_vfsops.c,v 1.11 2022/07/08 07:42:06 hannken Exp $ */
2
3 /*-
4 * Copyright (c) 2008, 2009, 2019 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 #include <sys/cdefs.h>
30 __KERNEL_RCSID(0, "$NetBSD: genfs_vfsops.c,v 1.11 2022/07/08 07:42:06 hannken Exp $");
31
32 #include <sys/types.h>
33 #include <sys/mount.h>
34 #include <sys/fstrans.h>
35 #include <sys/statvfs.h>
36 #include <sys/vnode.h>
37
38 #include <miscfs/genfs/genfs.h>
39 #include <miscfs/genfs/genfs_node.h>
40
41 int
genfs_statvfs(struct mount * mp,struct statvfs * sbp)42 genfs_statvfs(struct mount *mp, struct statvfs *sbp)
43 {
44
45 sbp->f_bsize = DEV_BSIZE;
46 sbp->f_frsize = DEV_BSIZE;
47 sbp->f_iosize = DEV_BSIZE;
48 sbp->f_blocks = 2; /* 1k to keep df happy */
49 sbp->f_bfree = 0;
50 sbp->f_bavail = 0;
51 sbp->f_bresvd = 0;
52 sbp->f_files = 0;
53 sbp->f_ffree = 0;
54 sbp->f_favail = 0;
55 sbp->f_fresvd = 0;
56 copy_statvfs_info(sbp, mp);
57
58 return 0;
59 }
60
61 int
genfs_renamelock_enter(struct mount * mp)62 genfs_renamelock_enter(struct mount *mp)
63 {
64 mutex_enter(mp->mnt_renamelock);
65 /* Preserve possible error return in case we become interruptible. */
66 return 0;
67 }
68
69 void
genfs_renamelock_exit(struct mount * mp)70 genfs_renamelock_exit(struct mount *mp)
71 {
72 mutex_exit(mp->mnt_renamelock);
73 }
74
75 int
genfs_suspendctl(struct mount * mp,int cmd)76 genfs_suspendctl(struct mount *mp, int cmd)
77 {
78 int error;
79
80 switch (cmd) {
81 case SUSPEND_SUSPEND:
82 error = fstrans_setstate(mp, FSTRANS_SUSPENDING);
83 if (error)
84 return error;
85 error = fstrans_setstate(mp, FSTRANS_SUSPENDED);
86 return error;
87
88 case SUSPEND_RESUME:
89 error = fstrans_setstate(mp, FSTRANS_NORMAL);
90 KASSERT(error == 0);
91 return 0;
92
93 default:
94 panic("%s: bogus command %d", __func__, cmd);
95 }
96 }
97