| 1 | /* $NetBSD: ffs_quota2.c,v 1.6 2016/07/07 06:55:44 msaitoh Exp $ */ |
| 2 | /*- |
| 3 | * Copyright (c) 2010 Manuel Bouyer |
| 4 | * All rights reserved. |
| 5 | * |
| 6 | * Redistribution and use in source and binary forms, with or without |
| 7 | * modification, are permitted provided that the following conditions |
| 8 | * are met: |
| 9 | * 1. Redistributions of source code must retain the above copyright |
| 10 | * notice, this list of conditions and the following disclaimer. |
| 11 | * 2. Redistributions in binary form must reproduce the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer in the |
| 13 | * documentation and/or other materials provided with the distribution. |
| 14 | * |
| 15 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
| 16 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
| 17 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 18 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
| 19 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 20 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 21 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 22 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 23 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 24 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 25 | * POSSIBILITY OF SUCH DAMAGE. |
| 26 | */ |
| 27 | |
| 28 | #include <sys/cdefs.h> |
| 29 | __KERNEL_RCSID(0, "$NetBSD: ffs_quota2.c,v 1.6 2016/07/07 06:55:44 msaitoh Exp $" ); |
| 30 | |
| 31 | #include <sys/param.h> |
| 32 | #include <sys/kernel.h> |
| 33 | #include <sys/systm.h> |
| 34 | #include <sys/namei.h> |
| 35 | #include <sys/file.h> |
| 36 | #include <sys/vnode.h> |
| 37 | #include <sys/mount.h> |
| 38 | #include <sys/kauth.h> |
| 39 | |
| 40 | #include <ufs/ufs/quota2.h> |
| 41 | #include <ufs/ufs/inode.h> |
| 42 | #include <ufs/ufs/ufsmount.h> |
| 43 | #include <ufs/ffs/ffs_extern.h> |
| 44 | #include <ufs/ffs/fs.h> |
| 45 | |
| 46 | int |
| 47 | ffs_quota2_mount(struct mount *mp) |
| 48 | { |
| 49 | struct ufsmount *ump = VFSTOUFS(mp); |
| 50 | struct fs *fs = ump->um_fs; |
| 51 | int error; |
| 52 | struct vnode *vp; |
| 53 | struct lwp *l = curlwp; |
| 54 | |
| 55 | if ((fs->fs_flags & FS_DOQUOTA2) == 0) |
| 56 | return 0; |
| 57 | |
| 58 | ump->um_flags |= UFS_QUOTA2; |
| 59 | ump->umq2_bsize = fs->fs_bsize; |
| 60 | ump->umq2_bmask = fs->fs_qbmask; |
| 61 | if (fs->fs_quota_magic != Q2_HEAD_MAGIC) { |
| 62 | printf("%s: invalid quota magic number\n" , |
| 63 | mp->mnt_stat.f_mntonname); |
| 64 | return EINVAL; |
| 65 | } |
| 66 | if ((fs->fs_quota_flags & FS_Q2_DO_TYPE(USRQUOTA)) && |
| 67 | fs->fs_quotafile[USRQUOTA] == 0) { |
| 68 | printf("%s: no user quota inode\n" , |
| 69 | mp->mnt_stat.f_mntonname); |
| 70 | return EINVAL; |
| 71 | } |
| 72 | if ((fs->fs_quota_flags & FS_Q2_DO_TYPE(GRPQUOTA)) && |
| 73 | fs->fs_quotafile[GRPQUOTA] == 0) { |
| 74 | printf("%s: no group quota inode\n" , |
| 75 | mp->mnt_stat.f_mntonname); |
| 76 | return EINVAL; |
| 77 | } |
| 78 | |
| 79 | if (fs->fs_quota_flags & FS_Q2_DO_TYPE(USRQUOTA) && |
| 80 | ump->um_quotas[USRQUOTA] == NULLVP) { |
| 81 | error = VFS_VGET(mp, fs->fs_quotafile[USRQUOTA], &vp); |
| 82 | if (error) { |
| 83 | printf("%s: can't vget() user quota inode: %d\n" , |
| 84 | mp->mnt_stat.f_mntonname, error); |
| 85 | return error; |
| 86 | } |
| 87 | ump->um_quotas[USRQUOTA] = vp; |
| 88 | ump->um_cred[USRQUOTA] = l->l_cred; |
| 89 | mutex_enter(vp->v_interlock); |
| 90 | vp->v_writecount++; |
| 91 | mutex_exit(vp->v_interlock); |
| 92 | VOP_UNLOCK(vp); |
| 93 | } |
| 94 | if (fs->fs_quota_flags & FS_Q2_DO_TYPE(GRPQUOTA) && |
| 95 | ump->um_quotas[GRPQUOTA] == NULLVP) { |
| 96 | error = VFS_VGET(mp, fs->fs_quotafile[GRPQUOTA], &vp); |
| 97 | if (error) { |
| 98 | vn_close(ump->um_quotas[USRQUOTA], |
| 99 | FREAD|FWRITE, l->l_cred); |
| 100 | printf("%s: can't vget() group quota inode: %d\n" , |
| 101 | mp->mnt_stat.f_mntonname, error); |
| 102 | return error; |
| 103 | } |
| 104 | ump->um_quotas[GRPQUOTA] = vp; |
| 105 | ump->um_cred[GRPQUOTA] = l->l_cred; |
| 106 | mutex_enter(vp->v_interlock); |
| 107 | vp->v_vflag |= VV_SYSTEM; |
| 108 | vp->v_writecount++; |
| 109 | mutex_exit(vp->v_interlock); |
| 110 | VOP_UNLOCK(vp); |
| 111 | } |
| 112 | |
| 113 | mp->mnt_flag |= MNT_QUOTA; |
| 114 | return 0; |
| 115 | } |
| 116 | |