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