Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/compat/netbsd32/netbsd32_compat_20.c
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1 /* $NetBSD: netbsd32_compat_20.c,v 1.26 2008/06/24 11:18:15 ad 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 1.26 2008/06/24 11:18:15 ad Exp $"); 31 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/malloc.h> 35 #include <sys/mount.h> 36 #include <sys/stat.h> 37 #include <sys/time.h> 38 #include <sys/ktrace.h> 39 #include <sys/vnode.h> 40 #include <sys/file.h> 41 #include <sys/filedesc.h> 42 #include <sys/namei.h> 43 #include <sys/syscallargs.h> 44 #include <sys/proc.h> 45 #include <sys/dirent.h> 46 47 #include <compat/netbsd32/netbsd32.h> 48 #include <compat/netbsd32/netbsd32_syscallargs.h> 49 #include <compat/netbsd32/netbsd32_conv.h> 50 51 static inline void compat_20_netbsd32_from_statvfs(struct statvfs *, 52 struct netbsd32_statfs *); 53 54 static inline void 55 compat_20_netbsd32_from_statvfs(struct statvfs *sbp, struct netbsd32_statfs *sb32p) 56 { 57 sb32p->f_flags = sbp->f_flag; 58 sb32p->f_bsize = (netbsd32_long)sbp->f_bsize; 59 sb32p->f_iosize = (netbsd32_long)sbp->f_iosize; 60 sb32p->f_blocks = (netbsd32_long)sbp->f_blocks; 61 sb32p->f_bfree = (netbsd32_long)sbp->f_bfree; 62 sb32p->f_bavail = (netbsd32_long)sbp->f_bavail; 63 sb32p->f_files = (netbsd32_long)sbp->f_files; 64 sb32p->f_ffree = (netbsd32_long)sbp->f_ffree; 65 sb32p->f_fsid = sbp->f_fsidx; 66 sb32p->f_owner = sbp->f_owner; 67 sb32p->f_spare[0] = 0; 68 sb32p->f_spare[1] = 0; 69 sb32p->f_spare[2] = 0; 70 sb32p->f_spare[3] = 0; 71 #if 1 72 /* May as well do the whole batch in one go */ 73 (void)memcpy(sb32p->f_fstypename, sbp->f_fstypename, 74 sizeof(sb32p->f_fstypename) + 75 sizeof(sb32p->f_mntonname) + 76 sizeof(sb32p->f_mntfromname)); 77 #else 78 /* If we want to be careful */ 79 (void)memcpy(sb32p->f_fstypename, sbp->f_fstypename, 80 sizeof(sb32p->f_fstypename)); 81 (void)memcpy(sb32p->f_mntonname, sbp->f_mntonname, 82 sizeof(sb32p->f_mntonname)); 83 (void)memcpy(sb32p->f_mntfromname, sbp->f_mntfromname, 84 sizeof(sb32p->f_mntfromname)); 85 #endif 86 } 87 88 int 89 compat_20_netbsd32_getfsstat(struct lwp *l, const struct compat_20_netbsd32_getfsstat_args *uap, register_t *retval) 90 { 91 /* { 92 syscallarg(netbsd32_statfsp_t) buf; 93 syscallarg(netbsd32_long) bufsize; 94 syscallarg(int) flags; 95 } */ 96 struct mount *mp, *nmp; 97 struct statvfs *sp; 98 struct netbsd32_statfs sb32; 99 void *sfsp; 100 long count, maxcount, error; 101 102 maxcount = SCARG(uap, bufsize) / sizeof(struct netbsd32_statfs); 103 sfsp = SCARG_P32(uap, buf); 104 mutex_enter(&mountlist_lock); 105 count = 0; 106 for (mp = mountlist.cqh_first; mp != (void *)&mountlist; mp = nmp) { 107 if (vfs_busy(mp, &nmp)) { 108 continue; 109 } 110 if (sfsp && count < maxcount) { 111 sp = &mp->mnt_stat; 112 /* 113 * If MNT_NOWAIT or MNT_LAZY is specified, do not 114 * refresh the fsstat cache. MNT_WAIT or MNT_LAZY 115 * overrides MNT_NOWAIT. 116 */ 117 if (SCARG(uap, flags) != MNT_NOWAIT && 118 SCARG(uap, flags) != MNT_LAZY && 119 (SCARG(uap, flags) == MNT_WAIT || 120 SCARG(uap, flags) == 0) && 121 (error = VFS_STATVFS(mp, sp)) != 0) { 122 mutex_enter(&mountlist_lock); 123 vfs_unbusy(mp, false, &nmp); 124 continue; 125 } 126 sp->f_flag = mp->mnt_flag & MNT_VISFLAGMASK; 127 compat_20_netbsd32_from_statvfs(sp, &sb32); 128 error = copyout(&sb32, sfsp, sizeof(sb32)); 129 if (error) { 130 vfs_unbusy(mp, false, NULL); 131 return (error); 132 } 133 sfsp = (char *)sfsp + sizeof(sb32); 134 } 135 count++; 136 mutex_enter(&mountlist_lock); 137 vfs_unbusy(mp, false, &nmp); 138 } 139 mutex_exit(&mountlist_lock); 140 if (sfsp && count > maxcount) 141 *retval = maxcount; 142 else 143 *retval = count; 144 return (0); 145 } 146 147 int 148 compat_20_netbsd32_statfs(struct lwp *l, const struct compat_20_netbsd32_statfs_args *uap, register_t *retval) 149 { 150 /* { 151 syscallarg(const netbsd32_charp) path; 152 syscallarg(netbsd32_statfsp_t) buf; 153 } */ 154 struct mount *mp; 155 struct statvfs *sp; 156 struct netbsd32_statfs s32; 157 int error; 158 struct nameidata nd; 159 160 NDINIT(&nd, LOOKUP, FOLLOW | TRYEMULROOT, UIO_USERSPACE, 161 SCARG_P32(uap, path)); 162 if ((error = namei(&nd)) != 0) 163 return (error); 164 mp = nd.ni_vp->v_mount; 165 sp = &mp->mnt_stat; 166 vrele(nd.ni_vp); 167 if ((error = VFS_STATVFS(mp, sp)) != 0) 168 return (error); 169 sp->f_flag = mp->mnt_flag & MNT_VISFLAGMASK; 170 compat_20_netbsd32_from_statvfs(sp, &s32); 171 return copyout(&s32, SCARG_P32(uap, buf), sizeof(s32)); 172 } 173 174 int 175 compat_20_netbsd32_fstatfs(struct lwp *l, const struct compat_20_netbsd32_fstatfs_args *uap, register_t *retval) 176 { 177 /* { 178 syscallarg(int) fd; 179 syscallarg(netbsd32_statfsp_t) buf; 180 } */ 181 file_t *fp; 182 struct mount *mp; 183 struct statvfs *sp; 184 struct netbsd32_statfs s32; 185 int error; 186 187 /* fd_getvnode() will use the descriptor for us */ 188 if ((error = fd_getvnode(SCARG(uap, fd), &fp)) != 0) 189 return (error); 190 mp = ((struct vnode *)fp->f_data)->v_mount; 191 sp = &mp->mnt_stat; 192 if ((error = VFS_STATVFS(mp, sp)) != 0) 193 goto out; 194 sp->f_flag = mp->mnt_flag & MNT_VISFLAGMASK; 195 compat_20_netbsd32_from_statvfs(sp, &s32); 196 error = copyout(&s32, SCARG_P32(uap, buf), sizeof(s32)); 197 out: 198 fd_putfile(SCARG(uap, fd)); 199 return (error); 200 } 201 202 int 203 compat_20_netbsd32_fhstatfs(struct lwp *l, const struct compat_20_netbsd32_fhstatfs_args *uap, register_t *retval) 204 { 205 /* { 206 syscallarg(const netbsd32_fhandlep_t) fhp; 207 syscallarg(struct statvfs *) buf; 208 } */ 209 struct compat_30_sys_fhstatvfs1_args ua; 210 211 NETBSD32TOP_UAP(fhp, const struct compat_30_fhandle); 212 NETBSD32TOP_UAP(buf, struct statvfs); 213 #ifdef notyet 214 NETBSD32TOP_UAP(flags, int); 215 #endif 216 return (compat_30_sys_fhstatvfs1(l, &ua, retval)); 217 }
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