| 1 | /* $NetBSD: netbsd32_compat_20.c,v 1.34 2014/09/05 09:21:54 matt Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright (c) 1998, 2001 Matthew R. Green |
| 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 AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 17 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 18 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 19 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 20 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
| 21 | * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| 22 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
| 23 | * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| 24 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 25 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 26 | * SUCH DAMAGE. |
| 27 | */ |
| 28 | |
| 29 | #include <sys/cdefs.h> |
| 30 | __KERNEL_RCSID(0, "$NetBSD: netbsd32_compat_20.c,v 1.34 2014/09/05 09:21:54 matt Exp $" ); |
| 31 | |
| 32 | #include <sys/param.h> |
| 33 | #include <sys/systm.h> |
| 34 | #include <sys/mount.h> |
| 35 | #include <sys/stat.h> |
| 36 | #include <sys/time.h> |
| 37 | #include <sys/ktrace.h> |
| 38 | #include <sys/vnode.h> |
| 39 | #include <sys/file.h> |
| 40 | #include <sys/filedesc.h> |
| 41 | #include <sys/namei.h> |
| 42 | #include <sys/syscallargs.h> |
| 43 | #include <sys/proc.h> |
| 44 | #include <sys/dirent.h> |
| 45 | |
| 46 | #include <compat/netbsd32/netbsd32.h> |
| 47 | #include <compat/netbsd32/netbsd32_syscallargs.h> |
| 48 | #include <compat/netbsd32/netbsd32_conv.h> |
| 49 | |
| 50 | static inline void compat_20_netbsd32_from_statvfs(struct statvfs *, |
| 51 | struct netbsd32_statfs *); |
| 52 | |
| 53 | static inline void |
| 54 | compat_20_netbsd32_from_statvfs(struct statvfs *sbp, struct netbsd32_statfs *sb32p) |
| 55 | { |
| 56 | sb32p->f_flags = sbp->f_flag; |
| 57 | sb32p->f_bsize = (netbsd32_long)sbp->f_bsize; |
| 58 | sb32p->f_iosize = (netbsd32_long)sbp->f_iosize; |
| 59 | sb32p->f_blocks = (netbsd32_long)sbp->f_blocks; |
| 60 | sb32p->f_bfree = (netbsd32_long)sbp->f_bfree; |
| 61 | sb32p->f_bavail = (netbsd32_long)sbp->f_bavail; |
| 62 | sb32p->f_files = (netbsd32_long)sbp->f_files; |
| 63 | sb32p->f_ffree = (netbsd32_long)sbp->f_ffree; |
| 64 | sb32p->f_fsid = sbp->f_fsidx; |
| 65 | sb32p->f_owner = sbp->f_owner; |
| 66 | sb32p->f_spare[0] = 0; |
| 67 | sb32p->f_spare[1] = 0; |
| 68 | sb32p->f_spare[2] = 0; |
| 69 | sb32p->f_spare[3] = 0; |
| 70 | (void)memcpy(sb32p->f_fstypename, sbp->f_fstypename, |
| 71 | sizeof(sb32p->f_fstypename)); |
| 72 | (void)memcpy(sb32p->f_mntonname, sbp->f_mntonname, |
| 73 | sizeof(sb32p->f_mntonname)); |
| 74 | (void)memcpy(sb32p->f_mntfromname, sbp->f_mntfromname, |
| 75 | sizeof(sb32p->f_mntfromname)); |
| 76 | } |
| 77 | |
| 78 | int |
| 79 | compat_20_netbsd32_getfsstat(struct lwp *l, const struct compat_20_netbsd32_getfsstat_args *uap, register_t *retval) |
| 80 | { |
| 81 | /* { |
| 82 | syscallarg(netbsd32_statfsp_t) buf; |
| 83 | syscallarg(netbsd32_long) bufsize; |
| 84 | syscallarg(int) flags; |
| 85 | } */ |
| 86 | int root = 0; |
| 87 | struct proc *p = l->l_proc; |
| 88 | struct mount *mp, *nmp; |
| 89 | struct statvfs *sb; |
| 90 | struct netbsd32_statfs sb32; |
| 91 | void *sfsp; |
| 92 | size_t count, maxcount; |
| 93 | int error = 0; |
| 94 | |
| 95 | sb = STATVFSBUF_GET(); |
| 96 | maxcount = SCARG(uap, bufsize) / sizeof(struct netbsd32_statfs); |
| 97 | sfsp = SCARG_P32(uap, buf); |
| 98 | mutex_enter(&mountlist_lock); |
| 99 | count = 0; |
| 100 | for (mp = TAILQ_FIRST(&mountlist); mp != NULL; mp = nmp) { |
| 101 | if (vfs_busy(mp, &nmp)) { |
| 102 | continue; |
| 103 | } |
| 104 | if (sfsp && count < maxcount) { |
| 105 | error = dostatvfs(mp, sb, l, SCARG(uap, flags), 0); |
| 106 | if (error) { |
| 107 | vfs_unbusy(mp, false, &nmp); |
| 108 | error = 0; |
| 109 | continue; |
| 110 | } |
| 111 | compat_20_netbsd32_from_statvfs(sb, &sb32); |
| 112 | error = copyout(&sb32, sfsp, sizeof(sb32)); |
| 113 | if (error) { |
| 114 | vfs_unbusy(mp, false, NULL); |
| 115 | goto out; |
| 116 | } |
| 117 | sfsp = (char *)sfsp + sizeof(sb32); |
| 118 | root |= strcmp(sb->f_mntonname, "/" ) == 0; |
| 119 | } |
| 120 | count++; |
| 121 | vfs_unbusy(mp, false, &nmp); |
| 122 | } |
| 123 | mutex_exit(&mountlist_lock); |
| 124 | |
| 125 | if (root == 0 && p->p_cwdi->cwdi_rdir) { |
| 126 | /* |
| 127 | * fake a root entry |
| 128 | */ |
| 129 | error = dostatvfs(p->p_cwdi->cwdi_rdir->v_mount, |
| 130 | sb, l, SCARG(uap, flags), 1); |
| 131 | if (error != 0) |
| 132 | goto out; |
| 133 | if (sfsp) { |
| 134 | compat_20_netbsd32_from_statvfs(sb, &sb32); |
| 135 | error = copyout(&sb32, sfsp, sizeof(sb32)); |
| 136 | if (error != 0) |
| 137 | goto out; |
| 138 | } |
| 139 | count++; |
| 140 | } |
| 141 | |
| 142 | if (sfsp && count > maxcount) |
| 143 | *retval = maxcount; |
| 144 | else |
| 145 | *retval = count; |
| 146 | out: |
| 147 | STATVFSBUF_PUT(sb); |
| 148 | return error; |
| 149 | } |
| 150 | |
| 151 | int |
| 152 | compat_20_netbsd32_statfs(struct lwp *l, const struct compat_20_netbsd32_statfs_args *uap, register_t *retval) |
| 153 | { |
| 154 | /* { |
| 155 | syscallarg(const netbsd32_charp) path; |
| 156 | syscallarg(netbsd32_statfsp_t) buf; |
| 157 | } */ |
| 158 | struct mount *mp; |
| 159 | struct statvfs *sb; |
| 160 | struct netbsd32_statfs s32; |
| 161 | int error; |
| 162 | struct vnode *vp; |
| 163 | |
| 164 | error = namei_simple_user(SCARG_P32(uap, path), |
| 165 | NSM_FOLLOW_TRYEMULROOT, &vp); |
| 166 | if (error != 0) |
| 167 | return (error); |
| 168 | mp = vp->v_mount; |
| 169 | sb = &mp->mnt_stat; |
| 170 | vrele(vp); |
| 171 | if ((error = dostatvfs(mp, sb, l, 0, 0)) != 0) |
| 172 | return (error); |
| 173 | compat_20_netbsd32_from_statvfs(sb, &s32); |
| 174 | return copyout(&s32, SCARG_P32(uap, buf), sizeof(s32)); |
| 175 | } |
| 176 | |
| 177 | int |
| 178 | compat_20_netbsd32_fstatfs(struct lwp *l, const struct compat_20_netbsd32_fstatfs_args *uap, register_t *retval) |
| 179 | { |
| 180 | /* { |
| 181 | syscallarg(int) fd; |
| 182 | syscallarg(netbsd32_statfsp_t) buf; |
| 183 | } */ |
| 184 | file_t *fp; |
| 185 | struct mount *mp; |
| 186 | struct statvfs *sb; |
| 187 | struct netbsd32_statfs s32; |
| 188 | int error; |
| 189 | |
| 190 | /* fd_getvnode() will use the descriptor for us */ |
| 191 | if ((error = fd_getvnode(SCARG(uap, fd), &fp)) != 0) |
| 192 | return (error); |
| 193 | mp = fp->f_vnode->v_mount; |
| 194 | sb = &mp->mnt_stat; |
| 195 | if ((error = dostatvfs(mp, sb, l, 0, 0)) != 0) |
| 196 | goto out; |
| 197 | compat_20_netbsd32_from_statvfs(sb, &s32); |
| 198 | error = copyout(&s32, SCARG_P32(uap, buf), sizeof(s32)); |
| 199 | out: |
| 200 | fd_putfile(SCARG(uap, fd)); |
| 201 | return (error); |
| 202 | } |
| 203 | |
| 204 | int |
| 205 | compat_20_netbsd32_fhstatfs(struct lwp *l, const struct compat_20_netbsd32_fhstatfs_args *uap, register_t *retval) |
| 206 | { |
| 207 | /* { |
| 208 | syscallarg(const netbsd32_fhandlep_t) fhp; |
| 209 | syscallarg(struct statvfs *) buf; |
| 210 | } */ |
| 211 | struct compat_30_sys_fhstatvfs1_args ua; |
| 212 | |
| 213 | NETBSD32TOP_UAP(fhp, const struct compat_30_fhandle); |
| 214 | NETBSD32TOP_UAP(buf, struct statvfs); |
| 215 | #ifdef notyet |
| 216 | NETBSD32TOP_UAP(flags, int); |
| 217 | #endif |
| 218 | return (compat_30_sys_fhstatvfs1(l, &ua, retval)); |
| 219 | } |
| 220 | |