1 /* $NetBSD: genfs_vfsops.c,v 1.10 2019/12/22 19:47:34 ad 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 1.10 2019/12/22 19:47:34 ad 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 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 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 70 genfs_renamelock_exit(struct mount *mp) 71 { 72 mutex_exit(mp->mnt_renamelock); 73 } 74 75 int 76 genfs_suspendctl(struct mount *mp, int cmd) 77 { 78 int error; 79 int error2 __diagused; 80 81 switch (cmd) { 82 case SUSPEND_SUSPEND: 83 error = fstrans_setstate(mp, FSTRANS_SUSPENDING); 84 if (error) 85 return error; 86 error = fstrans_setstate(mp, FSTRANS_SUSPENDED); 87 if (error == 0) { 88 if ((mp->mnt_iflag & IMNT_GONE) != 0) 89 error = ENOENT; 90 if (error) { 91 error2 = fstrans_setstate(mp, FSTRANS_NORMAL); 92 KASSERT(error2 == 0); 93 } 94 } 95 return error; 96 97 case SUSPEND_RESUME: 98 error2 = fstrans_setstate(mp, FSTRANS_NORMAL); 99 KASSERT(error2 == 0); 100 return 0; 101 102 default: 103 panic("%s: bogus command %d", __func__, cmd); 104 } 105 } 106