vfs_syscalls_20.c revision 1.3.2.7
1 1.3.2.7 skrll /* $NetBSD: vfs_syscalls_20.c,v 1.3.2.7 2005/11/10 14:00:40 skrll Exp $ */ 2 1.3.2.2 skrll 3 1.3.2.2 skrll /* 4 1.3.2.2 skrll * Copyright (c) 1989, 1993 5 1.3.2.2 skrll * The Regents of the University of California. All rights reserved. 6 1.3.2.2 skrll * (c) UNIX System Laboratories, Inc. 7 1.3.2.2 skrll * All or some portions of this file are derived from material licensed 8 1.3.2.2 skrll * to the University of California by American Telephone and Telegraph 9 1.3.2.2 skrll * Co. or Unix System Laboratories, Inc. and are reproduced herein with 10 1.3.2.2 skrll * the permission of UNIX System Laboratories, Inc. 11 1.3.2.2 skrll * 12 1.3.2.2 skrll * Redistribution and use in source and binary forms, with or without 13 1.3.2.2 skrll * modification, are permitted provided that the following conditions 14 1.3.2.2 skrll * are met: 15 1.3.2.2 skrll * 1. Redistributions of source code must retain the above copyright 16 1.3.2.2 skrll * notice, this list of conditions and the following disclaimer. 17 1.3.2.2 skrll * 2. Redistributions in binary form must reproduce the above copyright 18 1.3.2.2 skrll * notice, this list of conditions and the following disclaimer in the 19 1.3.2.2 skrll * documentation and/or other materials provided with the distribution. 20 1.3.2.2 skrll * 3. Neither the name of the University nor the names of its contributors 21 1.3.2.2 skrll * may be used to endorse or promote products derived from this software 22 1.3.2.2 skrll * without specific prior written permission. 23 1.3.2.2 skrll * 24 1.3.2.2 skrll * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 1.3.2.2 skrll * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 1.3.2.2 skrll * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 1.3.2.2 skrll * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 1.3.2.2 skrll * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 1.3.2.2 skrll * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 1.3.2.2 skrll * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 1.3.2.2 skrll * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 1.3.2.2 skrll * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 1.3.2.2 skrll * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 1.3.2.2 skrll * SUCH DAMAGE. 35 1.3.2.2 skrll * 36 1.3.2.2 skrll * @(#)vfs_syscalls.c 8.42 (Berkeley) 7/31/95 37 1.3.2.2 skrll */ 38 1.3.2.2 skrll 39 1.3.2.2 skrll #include <sys/cdefs.h> 40 1.3.2.7 skrll __KERNEL_RCSID(0, "$NetBSD: vfs_syscalls_20.c,v 1.3.2.7 2005/11/10 14:00:40 skrll Exp $"); 41 1.3.2.2 skrll 42 1.3.2.2 skrll #include "opt_compat_netbsd.h" 43 1.3.2.2 skrll #include "opt_compat_43.h" 44 1.3.2.2 skrll #include "opt_ktrace.h" 45 1.3.2.2 skrll #include "fss.h" 46 1.3.2.2 skrll 47 1.3.2.2 skrll #include <sys/param.h> 48 1.3.2.2 skrll #include <sys/systm.h> 49 1.3.2.2 skrll #include <sys/namei.h> 50 1.3.2.2 skrll #include <sys/filedesc.h> 51 1.3.2.2 skrll #include <sys/kernel.h> 52 1.3.2.2 skrll #include <sys/file.h> 53 1.3.2.2 skrll #include <sys/stat.h> 54 1.3.2.2 skrll #include <sys/vnode.h> 55 1.3.2.2 skrll #include <sys/mount.h> 56 1.3.2.2 skrll #include <sys/proc.h> 57 1.3.2.2 skrll #include <sys/uio.h> 58 1.3.2.2 skrll #include <sys/malloc.h> 59 1.3.2.2 skrll #include <sys/dirent.h> 60 1.3.2.2 skrll #include <sys/sysctl.h> 61 1.3.2.2 skrll #include <sys/sa.h> 62 1.3.2.2 skrll #include <sys/syscallargs.h> 63 1.3.2.2 skrll #ifdef KTRACE 64 1.3.2.2 skrll #include <sys/ktrace.h> 65 1.3.2.2 skrll #endif 66 1.3.2.2 skrll 67 1.3.2.7 skrll #include <compat/sys/mount.h> 68 1.3.2.7 skrll 69 1.3.2.2 skrll #ifdef COMPAT_09 70 1.3.2.2 skrll #define MOUNTNO_NONE 0 71 1.3.2.2 skrll #define MOUNTNO_UFS 1 /* UNIX "Fast" Filesystem */ 72 1.3.2.2 skrll #define MOUNTNO_NFS 2 /* Network Filesystem */ 73 1.3.2.2 skrll #define MOUNTNO_MFS 3 /* Memory Filesystem */ 74 1.3.2.2 skrll #define MOUNTNO_MSDOS 4 /* MSDOS Filesystem */ 75 1.3.2.2 skrll #define MOUNTNO_CD9660 5 /* iso9660 cdrom */ 76 1.3.2.2 skrll #define MOUNTNO_FDESC 6 /* /dev/fd filesystem */ 77 1.3.2.6 skrll #define MOUNTNO_KERNFS 7 /* kernel variable filesystem */ 78 1.3.2.2 skrll #define MOUNTNO_DEVFS 8 /* device node filesystem */ 79 1.3.2.2 skrll #define MOUNTNO_AFS 9 /* AFS 3.x */ 80 1.3.2.2 skrll static const struct { 81 1.3.2.2 skrll const char *name; 82 1.3.2.2 skrll const int value; 83 1.3.2.2 skrll } nv[] = { 84 1.3.2.2 skrll { MOUNT_UFS, MOUNTNO_UFS }, 85 1.3.2.2 skrll { MOUNT_NFS, MOUNTNO_NFS }, 86 1.3.2.2 skrll { MOUNT_MFS, MOUNTNO_MFS }, 87 1.3.2.2 skrll { MOUNT_MSDOS, MOUNTNO_MSDOS }, 88 1.3.2.2 skrll { MOUNT_CD9660, MOUNTNO_CD9660 }, 89 1.3.2.2 skrll { MOUNT_FDESC, MOUNTNO_FDESC }, 90 1.3.2.2 skrll { MOUNT_KERNFS, MOUNTNO_KERNFS }, 91 1.3.2.2 skrll { MOUNT_AFS, MOUNTNO_AFS }, 92 1.3.2.2 skrll }; 93 1.3.2.2 skrll #endif 94 1.3.2.2 skrll 95 1.3.2.2 skrll static int 96 1.3.2.6 skrll vfs2fs(struct statfs12 *bfs, const struct statvfs *fs) 97 1.3.2.2 skrll { 98 1.3.2.2 skrll struct statfs12 ofs; 99 1.3.2.2 skrll #ifdef COMPAT_09 100 1.3.2.2 skrll int i = 0; 101 1.3.2.2 skrll ofs.f_type = 0; 102 1.3.2.2 skrll ofs.f_oflags = (short)fs->f_flag; 103 1.3.2.2 skrll 104 1.3.2.2 skrll for (i = 0; i < sizeof(nv) / sizeof(nv[0]); i++) { 105 1.3.2.2 skrll if (strcmp(nv[i].name, fs->f_fstypename) == 0) { 106 1.3.2.2 skrll ofs.f_type = nv[i].value; 107 1.3.2.2 skrll break; 108 1.3.2.2 skrll } 109 1.3.2.2 skrll } 110 1.3.2.2 skrll #else 111 1.3.2.2 skrll ofs.f_type = 0; 112 1.3.2.2 skrll #endif 113 1.3.2.2 skrll #define CLAMP(a) (long)(((a) & ~LONG_MAX) ? LONG_MAX : (a)) 114 1.3.2.2 skrll ofs.f_bsize = CLAMP(fs->f_frsize); 115 1.3.2.2 skrll ofs.f_iosize = CLAMP(fs->f_iosize); 116 1.3.2.2 skrll ofs.f_blocks = CLAMP(fs->f_blocks); 117 1.3.2.2 skrll ofs.f_bfree = CLAMP(fs->f_bfree); 118 1.3.2.2 skrll if (fs->f_bfree > fs->f_bresvd) 119 1.3.2.2 skrll ofs.f_bavail = CLAMP(fs->f_bfree - fs->f_bresvd); 120 1.3.2.2 skrll else 121 1.3.2.2 skrll ofs.f_bavail = -CLAMP(fs->f_bresvd - fs->f_bfree); 122 1.3.2.2 skrll ofs.f_files = CLAMP(fs->f_files); 123 1.3.2.2 skrll ofs.f_ffree = CLAMP(fs->f_ffree); 124 1.3.2.2 skrll ofs.f_fsid = fs->f_fsidx; 125 1.3.2.2 skrll ofs.f_owner = fs->f_owner; 126 1.3.2.2 skrll ofs.f_flags = (long)fs->f_flag; 127 1.3.2.2 skrll ofs.f_syncwrites = CLAMP(fs->f_syncwrites); 128 1.3.2.2 skrll ofs.f_asyncwrites = CLAMP(fs->f_asyncwrites); 129 1.3.2.2 skrll (void)strncpy(ofs.f_fstypename, fs->f_fstypename, 130 1.3.2.2 skrll sizeof(ofs.f_fstypename)); 131 1.3.2.2 skrll (void)strncpy(ofs.f_mntonname, fs->f_mntonname, 132 1.3.2.2 skrll sizeof(ofs.f_mntonname)); 133 1.3.2.2 skrll (void)strncpy(ofs.f_mntfromname, fs->f_mntfromname, 134 1.3.2.2 skrll sizeof(ofs.f_mntfromname)); 135 1.3.2.2 skrll 136 1.3.2.2 skrll return copyout(&ofs, bfs, sizeof(ofs)); 137 1.3.2.2 skrll } 138 1.3.2.2 skrll 139 1.3.2.2 skrll /* 140 1.3.2.2 skrll * Get filesystem statistics. 141 1.3.2.2 skrll */ 142 1.3.2.2 skrll /* ARGSUSED */ 143 1.3.2.2 skrll int 144 1.3.2.2 skrll compat_20_sys_statfs(l, v, retval) 145 1.3.2.2 skrll struct lwp *l; 146 1.3.2.2 skrll void *v; 147 1.3.2.2 skrll register_t *retval; 148 1.3.2.2 skrll { 149 1.3.2.2 skrll struct compat_20_sys_statfs_args /* { 150 1.3.2.2 skrll syscallarg(const char *) path; 151 1.3.2.2 skrll syscallarg(struct statfs12 *) buf; 152 1.3.2.2 skrll } */ *uap = v; 153 1.3.2.2 skrll struct mount *mp; 154 1.3.2.2 skrll struct statvfs *sbuf; 155 1.3.2.2 skrll int error = 0; 156 1.3.2.2 skrll struct nameidata nd; 157 1.3.2.2 skrll 158 1.3.2.5 skrll NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), l); 159 1.3.2.2 skrll if ((error = namei(&nd)) != 0) 160 1.3.2.2 skrll return error; 161 1.3.2.2 skrll 162 1.3.2.2 skrll mp = nd.ni_vp->v_mount; 163 1.3.2.2 skrll vrele(nd.ni_vp); 164 1.3.2.2 skrll 165 1.3.2.2 skrll sbuf = malloc(sizeof(*sbuf), M_TEMP, M_WAITOK); 166 1.3.2.5 skrll if ((error = dostatvfs(mp, sbuf, l, 0, 1)) != 0) 167 1.3.2.2 skrll goto done; 168 1.3.2.2 skrll 169 1.3.2.2 skrll error = vfs2fs(SCARG(uap, buf), sbuf); 170 1.3.2.2 skrll done: 171 1.3.2.2 skrll free(sbuf, M_TEMP); 172 1.3.2.2 skrll return error; 173 1.3.2.2 skrll } 174 1.3.2.2 skrll 175 1.3.2.2 skrll /* 176 1.3.2.2 skrll * Get filesystem statistics. 177 1.3.2.2 skrll */ 178 1.3.2.2 skrll /* ARGSUSED */ 179 1.3.2.2 skrll int 180 1.3.2.2 skrll compat_20_sys_fstatfs(l, v, retval) 181 1.3.2.2 skrll struct lwp *l; 182 1.3.2.2 skrll void *v; 183 1.3.2.2 skrll register_t *retval; 184 1.3.2.2 skrll { 185 1.3.2.2 skrll struct compat_20_sys_fstatfs_args /* { 186 1.3.2.2 skrll syscallarg(int) fd; 187 1.3.2.2 skrll syscallarg(struct statfs12 *) buf; 188 1.3.2.2 skrll } */ *uap = v; 189 1.3.2.2 skrll struct proc *p = l->l_proc; 190 1.3.2.2 skrll struct file *fp; 191 1.3.2.2 skrll struct mount *mp; 192 1.3.2.2 skrll struct statvfs sbuf; 193 1.3.2.2 skrll int error; 194 1.3.2.2 skrll 195 1.3.2.2 skrll /* getvnode() will use the descriptor for us */ 196 1.3.2.2 skrll if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 197 1.3.2.2 skrll return (error); 198 1.3.2.2 skrll mp = ((struct vnode *)fp->f_data)->v_mount; 199 1.3.2.5 skrll if ((error = dostatvfs(mp, &sbuf, l, 0, 1)) != 0) 200 1.3.2.2 skrll goto out; 201 1.3.2.2 skrll error = vfs2fs(SCARG(uap, buf), &sbuf); 202 1.3.2.2 skrll out: 203 1.3.2.5 skrll FILE_UNUSE(fp, l); 204 1.3.2.2 skrll return error; 205 1.3.2.2 skrll } 206 1.3.2.2 skrll 207 1.3.2.2 skrll 208 1.3.2.2 skrll /* 209 1.3.2.2 skrll * Get statistics on all filesystems. 210 1.3.2.2 skrll */ 211 1.3.2.2 skrll int 212 1.3.2.2 skrll compat_20_sys_getfsstat(l, v, retval) 213 1.3.2.2 skrll struct lwp *l; 214 1.3.2.2 skrll void *v; 215 1.3.2.2 skrll register_t *retval; 216 1.3.2.2 skrll { 217 1.3.2.2 skrll struct compat_20_sys_getfsstat_args /* { 218 1.3.2.2 skrll syscallarg(struct statfs12 *) buf; 219 1.3.2.2 skrll syscallarg(long) bufsize; 220 1.3.2.2 skrll syscallarg(int) flags; 221 1.3.2.2 skrll } */ *uap = v; 222 1.3.2.2 skrll int root = 0; 223 1.3.2.2 skrll struct mount *mp, *nmp; 224 1.3.2.2 skrll struct statvfs sbuf; 225 1.3.2.2 skrll struct statfs12 *sfsp; 226 1.3.2.2 skrll size_t count, maxcount; 227 1.3.2.2 skrll int error = 0; 228 1.3.2.2 skrll 229 1.3.2.2 skrll maxcount = (size_t)SCARG(uap, bufsize) / sizeof(struct statfs12); 230 1.3.2.2 skrll sfsp = SCARG(uap, buf); 231 1.3.2.2 skrll simple_lock(&mountlist_slock); 232 1.3.2.2 skrll count = 0; 233 1.3.2.2 skrll for (mp = CIRCLEQ_FIRST(&mountlist); mp != (void *)&mountlist; 234 1.3.2.2 skrll mp = nmp) { 235 1.3.2.2 skrll if (vfs_busy(mp, LK_NOWAIT, &mountlist_slock)) { 236 1.3.2.2 skrll nmp = CIRCLEQ_NEXT(mp, mnt_list); 237 1.3.2.2 skrll continue; 238 1.3.2.2 skrll } 239 1.3.2.2 skrll if (sfsp && count < maxcount) { 240 1.3.2.5 skrll error = dostatvfs(mp, &sbuf, l, SCARG(uap, flags), 0); 241 1.3.2.2 skrll if (error) { 242 1.3.2.2 skrll simple_lock(&mountlist_slock); 243 1.3.2.2 skrll nmp = CIRCLEQ_NEXT(mp, mnt_list); 244 1.3.2.2 skrll vfs_unbusy(mp); 245 1.3.2.2 skrll continue; 246 1.3.2.2 skrll } 247 1.3.2.2 skrll error = vfs2fs(sfsp, &sbuf); 248 1.3.2.2 skrll if (error) { 249 1.3.2.2 skrll vfs_unbusy(mp); 250 1.3.2.2 skrll return (error); 251 1.3.2.2 skrll } 252 1.3.2.2 skrll sfsp++; 253 1.3.2.2 skrll root |= strcmp(sbuf.f_mntonname, "/") == 0; 254 1.3.2.2 skrll } 255 1.3.2.2 skrll count++; 256 1.3.2.2 skrll simple_lock(&mountlist_slock); 257 1.3.2.2 skrll nmp = CIRCLEQ_NEXT(mp, mnt_list); 258 1.3.2.2 skrll vfs_unbusy(mp); 259 1.3.2.2 skrll } 260 1.3.2.2 skrll simple_unlock(&mountlist_slock); 261 1.3.2.5 skrll if (root == 0 && l->l_proc->p_cwdi->cwdi_rdir) { 262 1.3.2.2 skrll /* 263 1.3.2.2 skrll * fake a root entry 264 1.3.2.2 skrll */ 265 1.3.2.5 skrll if ((error = dostatvfs(l->l_proc->p_cwdi->cwdi_rdir->v_mount, &sbuf, l, 266 1.3.2.2 skrll SCARG(uap, flags), 1)) != 0) 267 1.3.2.2 skrll return error; 268 1.3.2.2 skrll if (sfsp) 269 1.3.2.2 skrll error = vfs2fs(sfsp, &sbuf); 270 1.3.2.2 skrll count++; 271 1.3.2.2 skrll } 272 1.3.2.2 skrll if (sfsp && count > maxcount) 273 1.3.2.2 skrll *retval = maxcount; 274 1.3.2.2 skrll else 275 1.3.2.2 skrll *retval = count; 276 1.3.2.2 skrll return error; 277 1.3.2.2 skrll } 278 1.3.2.2 skrll 279 1.3.2.2 skrll int 280 1.3.2.2 skrll compat_20_sys_fhstatfs(l, v, retval) 281 1.3.2.2 skrll struct lwp *l; 282 1.3.2.2 skrll void *v; 283 1.3.2.2 skrll register_t *retval; 284 1.3.2.2 skrll { 285 1.3.2.2 skrll struct compat_20_sys_fhstatfs_args /* 286 1.3.2.2 skrll syscallarg(const fhandle_t *) fhp; 287 1.3.2.2 skrll syscallarg(struct statfs12 *) buf; 288 1.3.2.2 skrll } */ *uap = v; 289 1.3.2.2 skrll struct proc *p = l->l_proc; 290 1.3.2.2 skrll struct statvfs sbuf; 291 1.3.2.2 skrll fhandle_t fh; 292 1.3.2.2 skrll struct mount *mp; 293 1.3.2.2 skrll struct vnode *vp; 294 1.3.2.2 skrll int error; 295 1.3.2.2 skrll 296 1.3.2.2 skrll /* 297 1.3.2.2 skrll * Must be super user 298 1.3.2.2 skrll */ 299 1.3.2.2 skrll if ((error = suser(p->p_ucred, &p->p_acflag))) 300 1.3.2.2 skrll return (error); 301 1.3.2.2 skrll 302 1.3.2.2 skrll if ((error = copyin(SCARG(uap, fhp), &fh, sizeof(fhandle_t))) != 0) 303 1.3.2.2 skrll return (error); 304 1.3.2.2 skrll 305 1.3.2.2 skrll if ((mp = vfs_getvfs(&fh.fh_fsid)) == NULL) 306 1.3.2.2 skrll return (ESTALE); 307 1.3.2.3 skrll if ((error = VFS_FHTOVP(mp, &fh.fh_fid, &vp))) 308 1.3.2.2 skrll return (error); 309 1.3.2.2 skrll mp = vp->v_mount; 310 1.3.2.2 skrll vput(vp); 311 1.3.2.5 skrll if ((error = VFS_STATVFS(mp, &sbuf, l)) != 0) 312 1.3.2.2 skrll return (error); 313 1.3.2.2 skrll return vfs2fs(SCARG(uap, buf), &sbuf); 314 1.3.2.2 skrll } 315
Indexes created Wed Oct 22 13:09:56 GMT 2025