vfs_syscalls_20.c revision 1.3.2.2
1 1.3.2.2 skrll /* $NetBSD: vfs_syscalls_20.c,v 1.3.2.2 2004/08/03 10:43:29 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 1.3.2.2 skrll __KERNEL_RCSID(0, "$NetBSD: vfs_syscalls_20.c,v 1.3.2.2 2004/08/03 10:43:29 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 1.3.2.2 skrll #ifdef COMPAT_09 68 1.3.2.2 skrll #define MOUNTNO_NONE 0 69 1.3.2.2 skrll #define MOUNTNO_UFS 1 /* UNIX "Fast" Filesystem */ 70 1.3.2.2 skrll #define MOUNTNO_NFS 2 /* Network Filesystem */ 71 1.3.2.2 skrll #define MOUNTNO_MFS 3 /* Memory Filesystem */ 72 1.3.2.2 skrll #define MOUNTNO_MSDOS 4 /* MSDOS Filesystem */ 73 1.3.2.2 skrll #define MOUNTNO_CD9660 5 /* iso9660 cdrom */ 74 1.3.2.2 skrll #define MOUNTNO_FDESC 6 /* /dev/fd filesystem */ 75 1.3.2.2 skrll #define MOUNTNO_KERNFS 7 /* kernel variable filesystem */ 76 1.3.2.2 skrll #define MOUNTNO_DEVFS 8 /* device node filesystem */ 77 1.3.2.2 skrll #define MOUNTNO_AFS 9 /* AFS 3.x */ 78 1.3.2.2 skrll static const struct { 79 1.3.2.2 skrll const char *name; 80 1.3.2.2 skrll const int value; 81 1.3.2.2 skrll } nv[] = { 82 1.3.2.2 skrll { MOUNT_UFS, MOUNTNO_UFS }, 83 1.3.2.2 skrll { MOUNT_NFS, MOUNTNO_NFS }, 84 1.3.2.2 skrll { MOUNT_MFS, MOUNTNO_MFS }, 85 1.3.2.2 skrll { MOUNT_MSDOS, MOUNTNO_MSDOS }, 86 1.3.2.2 skrll { MOUNT_CD9660, MOUNTNO_CD9660 }, 87 1.3.2.2 skrll { MOUNT_FDESC, MOUNTNO_FDESC }, 88 1.3.2.2 skrll { MOUNT_KERNFS, MOUNTNO_KERNFS }, 89 1.3.2.2 skrll { MOUNT_AFS, MOUNTNO_AFS }, 90 1.3.2.2 skrll }; 91 1.3.2.2 skrll #endif 92 1.3.2.2 skrll 93 1.3.2.2 skrll static int 94 1.3.2.2 skrll vfs2fs(struct statfs12 *bfs, const struct statvfs *fs) 95 1.3.2.2 skrll { 96 1.3.2.2 skrll struct statfs12 ofs; 97 1.3.2.2 skrll #ifdef COMPAT_09 98 1.3.2.2 skrll int i = 0; 99 1.3.2.2 skrll ofs.f_type = 0; 100 1.3.2.2 skrll ofs.f_oflags = (short)fs->f_flag; 101 1.3.2.2 skrll 102 1.3.2.2 skrll for (i = 0; i < sizeof(nv) / sizeof(nv[0]); i++) { 103 1.3.2.2 skrll if (strcmp(nv[i].name, fs->f_fstypename) == 0) { 104 1.3.2.2 skrll ofs.f_type = nv[i].value; 105 1.3.2.2 skrll break; 106 1.3.2.2 skrll } 107 1.3.2.2 skrll } 108 1.3.2.2 skrll #else 109 1.3.2.2 skrll ofs.f_type = 0; 110 1.3.2.2 skrll #endif 111 1.3.2.2 skrll #define CLAMP(a) (long)(((a) & ~LONG_MAX) ? LONG_MAX : (a)) 112 1.3.2.2 skrll ofs.f_bsize = CLAMP(fs->f_frsize); 113 1.3.2.2 skrll ofs.f_iosize = CLAMP(fs->f_iosize); 114 1.3.2.2 skrll ofs.f_blocks = CLAMP(fs->f_blocks); 115 1.3.2.2 skrll ofs.f_bfree = CLAMP(fs->f_bfree); 116 1.3.2.2 skrll if (fs->f_bfree > fs->f_bresvd) 117 1.3.2.2 skrll ofs.f_bavail = CLAMP(fs->f_bfree - fs->f_bresvd); 118 1.3.2.2 skrll else 119 1.3.2.2 skrll ofs.f_bavail = -CLAMP(fs->f_bresvd - fs->f_bfree); 120 1.3.2.2 skrll ofs.f_files = CLAMP(fs->f_files); 121 1.3.2.2 skrll ofs.f_ffree = CLAMP(fs->f_ffree); 122 1.3.2.2 skrll ofs.f_fsid = fs->f_fsidx; 123 1.3.2.2 skrll ofs.f_owner = fs->f_owner; 124 1.3.2.2 skrll ofs.f_flags = (long)fs->f_flag; 125 1.3.2.2 skrll ofs.f_syncwrites = CLAMP(fs->f_syncwrites); 126 1.3.2.2 skrll ofs.f_asyncwrites = CLAMP(fs->f_asyncwrites); 127 1.3.2.2 skrll (void)strncpy(ofs.f_fstypename, fs->f_fstypename, 128 1.3.2.2 skrll sizeof(ofs.f_fstypename)); 129 1.3.2.2 skrll (void)strncpy(ofs.f_mntonname, fs->f_mntonname, 130 1.3.2.2 skrll sizeof(ofs.f_mntonname)); 131 1.3.2.2 skrll (void)strncpy(ofs.f_mntfromname, fs->f_mntfromname, 132 1.3.2.2 skrll sizeof(ofs.f_mntfromname)); 133 1.3.2.2 skrll 134 1.3.2.2 skrll return copyout(&ofs, bfs, sizeof(ofs)); 135 1.3.2.2 skrll } 136 1.3.2.2 skrll 137 1.3.2.2 skrll /* 138 1.3.2.2 skrll * Get filesystem statistics. 139 1.3.2.2 skrll */ 140 1.3.2.2 skrll /* ARGSUSED */ 141 1.3.2.2 skrll int 142 1.3.2.2 skrll compat_20_sys_statfs(l, v, retval) 143 1.3.2.2 skrll struct lwp *l; 144 1.3.2.2 skrll void *v; 145 1.3.2.2 skrll register_t *retval; 146 1.3.2.2 skrll { 147 1.3.2.2 skrll struct compat_20_sys_statfs_args /* { 148 1.3.2.2 skrll syscallarg(const char *) path; 149 1.3.2.2 skrll syscallarg(struct statfs12 *) buf; 150 1.3.2.2 skrll } */ *uap = v; 151 1.3.2.2 skrll struct mount *mp; 152 1.3.2.2 skrll struct statvfs *sbuf; 153 1.3.2.2 skrll int error = 0; 154 1.3.2.2 skrll struct nameidata nd; 155 1.3.2.2 skrll 156 1.3.2.2 skrll NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), l); 157 1.3.2.2 skrll if ((error = namei(&nd)) != 0) 158 1.3.2.2 skrll return error; 159 1.3.2.2 skrll 160 1.3.2.2 skrll mp = nd.ni_vp->v_mount; 161 1.3.2.2 skrll vrele(nd.ni_vp); 162 1.3.2.2 skrll 163 1.3.2.2 skrll sbuf = malloc(sizeof(*sbuf), M_TEMP, M_WAITOK); 164 1.3.2.2 skrll if ((error = dostatvfs(mp, sbuf, l, 0, 1)) != 0) 165 1.3.2.2 skrll goto done; 166 1.3.2.2 skrll 167 1.3.2.2 skrll error = vfs2fs(SCARG(uap, buf), sbuf); 168 1.3.2.2 skrll done: 169 1.3.2.2 skrll free(sbuf, M_TEMP); 170 1.3.2.2 skrll return error; 171 1.3.2.2 skrll } 172 1.3.2.2 skrll 173 1.3.2.2 skrll /* 174 1.3.2.2 skrll * Get filesystem statistics. 175 1.3.2.2 skrll */ 176 1.3.2.2 skrll /* ARGSUSED */ 177 1.3.2.2 skrll int 178 1.3.2.2 skrll compat_20_sys_fstatfs(l, v, retval) 179 1.3.2.2 skrll struct lwp *l; 180 1.3.2.2 skrll void *v; 181 1.3.2.2 skrll register_t *retval; 182 1.3.2.2 skrll { 183 1.3.2.2 skrll struct compat_20_sys_fstatfs_args /* { 184 1.3.2.2 skrll syscallarg(int) fd; 185 1.3.2.2 skrll syscallarg(struct statfs12 *) buf; 186 1.3.2.2 skrll } */ *uap = v; 187 1.3.2.2 skrll struct proc *p = l->l_proc; 188 1.3.2.2 skrll struct file *fp; 189 1.3.2.2 skrll struct mount *mp; 190 1.3.2.2 skrll struct statvfs sbuf; 191 1.3.2.2 skrll int error; 192 1.3.2.2 skrll 193 1.3.2.2 skrll /* getvnode() will use the descriptor for us */ 194 1.3.2.2 skrll if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 195 1.3.2.2 skrll return (error); 196 1.3.2.2 skrll mp = ((struct vnode *)fp->f_data)->v_mount; 197 1.3.2.2 skrll if ((error = dostatvfs(mp, &sbuf, l, 0, 1)) != 0) 198 1.3.2.2 skrll goto out; 199 1.3.2.2 skrll error = vfs2fs(SCARG(uap, buf), &sbuf); 200 1.3.2.2 skrll out: 201 1.3.2.2 skrll FILE_UNUSE(fp, l); 202 1.3.2.2 skrll return error; 203 1.3.2.2 skrll } 204 1.3.2.2 skrll 205 1.3.2.2 skrll 206 1.3.2.2 skrll /* 207 1.3.2.2 skrll * Get statistics on all filesystems. 208 1.3.2.2 skrll */ 209 1.3.2.2 skrll int 210 1.3.2.2 skrll compat_20_sys_getfsstat(l, v, retval) 211 1.3.2.2 skrll struct lwp *l; 212 1.3.2.2 skrll void *v; 213 1.3.2.2 skrll register_t *retval; 214 1.3.2.2 skrll { 215 1.3.2.2 skrll struct compat_20_sys_getfsstat_args /* { 216 1.3.2.2 skrll syscallarg(struct statfs12 *) buf; 217 1.3.2.2 skrll syscallarg(long) bufsize; 218 1.3.2.2 skrll syscallarg(int) flags; 219 1.3.2.2 skrll } */ *uap = v; 220 1.3.2.2 skrll int root = 0; 221 1.3.2.2 skrll struct mount *mp, *nmp; 222 1.3.2.2 skrll struct statvfs sbuf; 223 1.3.2.2 skrll struct statfs12 *sfsp; 224 1.3.2.2 skrll size_t count, maxcount; 225 1.3.2.2 skrll int error = 0; 226 1.3.2.2 skrll 227 1.3.2.2 skrll maxcount = (size_t)SCARG(uap, bufsize) / sizeof(struct statfs12); 228 1.3.2.2 skrll sfsp = SCARG(uap, buf); 229 1.3.2.2 skrll simple_lock(&mountlist_slock); 230 1.3.2.2 skrll count = 0; 231 1.3.2.2 skrll for (mp = CIRCLEQ_FIRST(&mountlist); mp != (void *)&mountlist; 232 1.3.2.2 skrll mp = nmp) { 233 1.3.2.2 skrll if (vfs_busy(mp, LK_NOWAIT, &mountlist_slock)) { 234 1.3.2.2 skrll nmp = CIRCLEQ_NEXT(mp, mnt_list); 235 1.3.2.2 skrll continue; 236 1.3.2.2 skrll } 237 1.3.2.2 skrll if (sfsp && count < maxcount) { 238 1.3.2.2 skrll error = dostatvfs(mp, &sbuf, l, SCARG(uap, flags), 0); 239 1.3.2.2 skrll if (error) { 240 1.3.2.2 skrll simple_lock(&mountlist_slock); 241 1.3.2.2 skrll nmp = CIRCLEQ_NEXT(mp, mnt_list); 242 1.3.2.2 skrll vfs_unbusy(mp); 243 1.3.2.2 skrll continue; 244 1.3.2.2 skrll } 245 1.3.2.2 skrll error = vfs2fs(sfsp, &sbuf); 246 1.3.2.2 skrll if (error) { 247 1.3.2.2 skrll vfs_unbusy(mp); 248 1.3.2.2 skrll return (error); 249 1.3.2.2 skrll } 250 1.3.2.2 skrll sfsp++; 251 1.3.2.2 skrll root |= strcmp(sbuf.f_mntonname, "/") == 0; 252 1.3.2.2 skrll } 253 1.3.2.2 skrll count++; 254 1.3.2.2 skrll simple_lock(&mountlist_slock); 255 1.3.2.2 skrll nmp = CIRCLEQ_NEXT(mp, mnt_list); 256 1.3.2.2 skrll vfs_unbusy(mp); 257 1.3.2.2 skrll } 258 1.3.2.2 skrll simple_unlock(&mountlist_slock); 259 1.3.2.2 skrll if (root == 0 && l->l_proc->p_cwdi->cwdi_rdir) { 260 1.3.2.2 skrll /* 261 1.3.2.2 skrll * fake a root entry 262 1.3.2.2 skrll */ 263 1.3.2.2 skrll if ((error = dostatvfs(l->l_proc->p_cwdi->cwdi_rdir->v_mount, &sbuf, l, 264 1.3.2.2 skrll SCARG(uap, flags), 1)) != 0) 265 1.3.2.2 skrll return error; 266 1.3.2.2 skrll if (sfsp) 267 1.3.2.2 skrll error = vfs2fs(sfsp, &sbuf); 268 1.3.2.2 skrll count++; 269 1.3.2.2 skrll } 270 1.3.2.2 skrll if (sfsp && count > maxcount) 271 1.3.2.2 skrll *retval = maxcount; 272 1.3.2.2 skrll else 273 1.3.2.2 skrll *retval = count; 274 1.3.2.2 skrll return error; 275 1.3.2.2 skrll } 276 1.3.2.2 skrll 277 1.3.2.2 skrll int 278 1.3.2.2 skrll compat_20_sys_fhstatfs(l, v, retval) 279 1.3.2.2 skrll struct lwp *l; 280 1.3.2.2 skrll void *v; 281 1.3.2.2 skrll register_t *retval; 282 1.3.2.2 skrll { 283 1.3.2.2 skrll struct compat_20_sys_fhstatfs_args /* 284 1.3.2.2 skrll syscallarg(const fhandle_t *) fhp; 285 1.3.2.2 skrll syscallarg(struct statfs12 *) buf; 286 1.3.2.2 skrll } */ *uap = v; 287 1.3.2.2 skrll struct proc *p = l->l_proc; 288 1.3.2.2 skrll struct statvfs sbuf; 289 1.3.2.2 skrll fhandle_t fh; 290 1.3.2.2 skrll struct mount *mp; 291 1.3.2.2 skrll struct vnode *vp; 292 1.3.2.2 skrll int error; 293 1.3.2.2 skrll 294 1.3.2.2 skrll /* 295 1.3.2.2 skrll * Must be super user 296 1.3.2.2 skrll */ 297 1.3.2.2 skrll if ((error = suser(p->p_ucred, &p->p_acflag))) 298 1.3.2.2 skrll return (error); 299 1.3.2.2 skrll 300 1.3.2.2 skrll if ((error = copyin(SCARG(uap, fhp), &fh, sizeof(fhandle_t))) != 0) 301 1.3.2.2 skrll return (error); 302 1.3.2.2 skrll 303 1.3.2.2 skrll if ((mp = vfs_getvfs(&fh.fh_fsid)) == NULL) 304 1.3.2.2 skrll return (ESTALE); 305 1.3.2.2 skrll if ((error = VFS_FHTOVP(mp, &fh.fh_fid, &vp, l))) 306 1.3.2.2 skrll return (error); 307 1.3.2.2 skrll mp = vp->v_mount; 308 1.3.2.2 skrll vput(vp); 309 1.3.2.2 skrll if ((error = VFS_STATVFS(mp, &sbuf, l)) != 0) 310 1.3.2.2 skrll return (error); 311 1.3.2.2 skrll return vfs2fs(SCARG(uap, buf), &sbuf); 312 1.3.2.2 skrll } 313
Indexes created Mon Oct 20 03:09:53 GMT 2025