vfs_syscalls_20.c revision 1.6.6.1
1 /* $NetBSD: vfs_syscalls_20.c,v 1.6.6.1 2006/04/22 11:38:12 simonb Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * (c) UNIX System Laboratories, Inc. 7 * All or some portions of this file are derived from material licensed 8 * to the University of California by American Telephone and Telegraph 9 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 10 * the permission of UNIX System Laboratories, Inc. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)vfs_syscalls.c 8.42 (Berkeley) 7/31/95 37 */ 38 39 #include <sys/cdefs.h> 40 __KERNEL_RCSID(0, "$NetBSD: vfs_syscalls_20.c,v 1.6.6.1 2006/04/22 11:38:12 simonb Exp $"); 41 42 #include "opt_compat_netbsd.h" 43 #include "opt_compat_43.h" 44 #include "fss.h" 45 46 #include <sys/param.h> 47 #include <sys/systm.h> 48 #include <sys/namei.h> 49 #include <sys/filedesc.h> 50 #include <sys/kernel.h> 51 #include <sys/file.h> 52 #include <sys/stat.h> 53 #include <sys/vnode.h> 54 #include <sys/mount.h> 55 #include <sys/proc.h> 56 #include <sys/uio.h> 57 #include <sys/malloc.h> 58 #include <sys/dirent.h> 59 #include <sys/sysctl.h> 60 #include <sys/sa.h> 61 #include <sys/syscallargs.h> 62 63 #include <compat/sys/mount.h> 64 65 #ifdef COMPAT_09 66 #define MOUNTNO_NONE 0 67 #define MOUNTNO_UFS 1 /* UNIX "Fast" Filesystem */ 68 #define MOUNTNO_NFS 2 /* Network Filesystem */ 69 #define MOUNTNO_MFS 3 /* Memory Filesystem */ 70 #define MOUNTNO_MSDOS 4 /* MSDOS Filesystem */ 71 #define MOUNTNO_CD9660 5 /* iso9660 cdrom */ 72 #define MOUNTNO_FDESC 6 /* /dev/fd filesystem */ 73 #define MOUNTNO_KERNFS 7 /* kernel variable filesystem */ 74 #define MOUNTNO_DEVFS 8 /* device node filesystem */ 75 #define MOUNTNO_AFS 9 /* AFS 3.x */ 76 static const struct { 77 const char *name; 78 const int value; 79 } nv[] = { 80 { MOUNT_UFS, MOUNTNO_UFS }, 81 { MOUNT_NFS, MOUNTNO_NFS }, 82 { MOUNT_MFS, MOUNTNO_MFS }, 83 { MOUNT_MSDOS, MOUNTNO_MSDOS }, 84 { MOUNT_CD9660, MOUNTNO_CD9660 }, 85 { MOUNT_FDESC, MOUNTNO_FDESC }, 86 { MOUNT_KERNFS, MOUNTNO_KERNFS }, 87 { MOUNT_AFS, MOUNTNO_AFS }, 88 }; 89 #endif 90 91 static int 92 vfs2fs(struct statfs12 *bfs, const struct statvfs *fs) 93 { 94 struct statfs12 ofs; 95 #ifdef COMPAT_09 96 int i = 0; 97 ofs.f_type = 0; 98 ofs.f_oflags = (short)fs->f_flag; 99 100 for (i = 0; i < sizeof(nv) / sizeof(nv[0]); i++) { 101 if (strcmp(nv[i].name, fs->f_fstypename) == 0) { 102 ofs.f_type = nv[i].value; 103 break; 104 } 105 } 106 #else 107 ofs.f_type = 0; 108 #endif 109 #define CLAMP(a) (long)(((a) & ~LONG_MAX) ? LONG_MAX : (a)) 110 ofs.f_bsize = CLAMP(fs->f_frsize); 111 ofs.f_iosize = CLAMP(fs->f_iosize); 112 ofs.f_blocks = CLAMP(fs->f_blocks); 113 ofs.f_bfree = CLAMP(fs->f_bfree); 114 if (fs->f_bfree > fs->f_bresvd) 115 ofs.f_bavail = CLAMP(fs->f_bfree - fs->f_bresvd); 116 else 117 ofs.f_bavail = -CLAMP(fs->f_bresvd - fs->f_bfree); 118 ofs.f_files = CLAMP(fs->f_files); 119 ofs.f_ffree = CLAMP(fs->f_ffree); 120 ofs.f_fsid = fs->f_fsidx; 121 ofs.f_owner = fs->f_owner; 122 ofs.f_flags = (long)fs->f_flag; 123 ofs.f_syncwrites = CLAMP(fs->f_syncwrites); 124 ofs.f_asyncwrites = CLAMP(fs->f_asyncwrites); 125 (void)strncpy(ofs.f_fstypename, fs->f_fstypename, 126 sizeof(ofs.f_fstypename)); 127 (void)strncpy(ofs.f_mntonname, fs->f_mntonname, 128 sizeof(ofs.f_mntonname)); 129 (void)strncpy(ofs.f_mntfromname, fs->f_mntfromname, 130 sizeof(ofs.f_mntfromname)); 131 132 return copyout(&ofs, bfs, sizeof(ofs)); 133 } 134 135 /* 136 * Get filesystem statistics. 137 */ 138 /* ARGSUSED */ 139 int 140 compat_20_sys_statfs(l, v, retval) 141 struct lwp *l; 142 void *v; 143 register_t *retval; 144 { 145 struct compat_20_sys_statfs_args /* { 146 syscallarg(const char *) path; 147 syscallarg(struct statfs12 *) buf; 148 } */ *uap = v; 149 struct mount *mp; 150 struct statvfs *sbuf; 151 int error = 0; 152 struct nameidata nd; 153 154 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), l); 155 if ((error = namei(&nd)) != 0) 156 return error; 157 158 mp = nd.ni_vp->v_mount; 159 vrele(nd.ni_vp); 160 161 sbuf = malloc(sizeof(*sbuf), M_TEMP, M_WAITOK); 162 if ((error = dostatvfs(mp, sbuf, l, 0, 1)) != 0) 163 goto done; 164 165 error = vfs2fs(SCARG(uap, buf), sbuf); 166 done: 167 free(sbuf, M_TEMP); 168 return error; 169 } 170 171 /* 172 * Get filesystem statistics. 173 */ 174 /* ARGSUSED */ 175 int 176 compat_20_sys_fstatfs(l, v, retval) 177 struct lwp *l; 178 void *v; 179 register_t *retval; 180 { 181 struct compat_20_sys_fstatfs_args /* { 182 syscallarg(int) fd; 183 syscallarg(struct statfs12 *) buf; 184 } */ *uap = v; 185 struct proc *p = l->l_proc; 186 struct file *fp; 187 struct mount *mp; 188 struct statvfs sbuf; 189 int error; 190 191 /* getvnode() will use the descriptor for us */ 192 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 193 return (error); 194 mp = ((struct vnode *)fp->f_data)->v_mount; 195 if ((error = dostatvfs(mp, &sbuf, l, 0, 1)) != 0) 196 goto out; 197 error = vfs2fs(SCARG(uap, buf), &sbuf); 198 out: 199 FILE_UNUSE(fp, l); 200 return error; 201 } 202 203 204 /* 205 * Get statistics on all filesystems. 206 */ 207 int 208 compat_20_sys_getfsstat(l, v, retval) 209 struct lwp *l; 210 void *v; 211 register_t *retval; 212 { 213 struct compat_20_sys_getfsstat_args /* { 214 syscallarg(struct statfs12 *) buf; 215 syscallarg(long) bufsize; 216 syscallarg(int) flags; 217 } */ *uap = v; 218 int root = 0; 219 struct mount *mp, *nmp; 220 struct statvfs sbuf; 221 struct statfs12 *sfsp; 222 size_t count, maxcount; 223 int error = 0; 224 225 maxcount = (size_t)SCARG(uap, bufsize) / sizeof(struct statfs12); 226 sfsp = SCARG(uap, buf); 227 simple_lock(&mountlist_slock); 228 count = 0; 229 for (mp = CIRCLEQ_FIRST(&mountlist); mp != (void *)&mountlist; 230 mp = nmp) { 231 if (vfs_busy(mp, LK_NOWAIT, &mountlist_slock)) { 232 nmp = CIRCLEQ_NEXT(mp, mnt_list); 233 continue; 234 } 235 if (sfsp && count < maxcount) { 236 error = dostatvfs(mp, &sbuf, l, SCARG(uap, flags), 0); 237 if (error) { 238 simple_lock(&mountlist_slock); 239 nmp = CIRCLEQ_NEXT(mp, mnt_list); 240 vfs_unbusy(mp); 241 continue; 242 } 243 error = vfs2fs(sfsp, &sbuf); 244 if (error) { 245 vfs_unbusy(mp); 246 return (error); 247 } 248 sfsp++; 249 root |= strcmp(sbuf.f_mntonname, "/") == 0; 250 } 251 count++; 252 simple_lock(&mountlist_slock); 253 nmp = CIRCLEQ_NEXT(mp, mnt_list); 254 vfs_unbusy(mp); 255 } 256 simple_unlock(&mountlist_slock); 257 if (root == 0 && l->l_proc->p_cwdi->cwdi_rdir) { 258 /* 259 * fake a root entry 260 */ 261 if ((error = dostatvfs(l->l_proc->p_cwdi->cwdi_rdir->v_mount, &sbuf, l, 262 SCARG(uap, flags), 1)) != 0) 263 return error; 264 if (sfsp) 265 error = vfs2fs(sfsp, &sbuf); 266 count++; 267 } 268 if (sfsp && count > maxcount) 269 *retval = maxcount; 270 else 271 *retval = count; 272 return error; 273 } 274 275 int 276 compat_20_sys_fhstatfs(l, v, retval) 277 struct lwp *l; 278 void *v; 279 register_t *retval; 280 { 281 struct compat_20_sys_fhstatfs_args /* 282 syscallarg(const fhandle_t *) fhp; 283 syscallarg(struct statfs12 *) buf; 284 } */ *uap = v; 285 struct proc *p = l->l_proc; 286 struct statvfs sbuf; 287 fhandle_t fh; 288 struct mount *mp; 289 struct vnode *vp; 290 int error; 291 292 /* 293 * Must be super user 294 */ 295 if ((error = suser(p->p_ucred, &p->p_acflag))) 296 return (error); 297 298 if ((error = copyin(SCARG(uap, fhp), &fh, sizeof(fhandle_t))) != 0) 299 return (error); 300 301 if ((mp = vfs_getvfs(&fh.fh_fsid)) == NULL) 302 return (ESTALE); 303 if ((error = VFS_FHTOVP(mp, &fh.fh_fid, &vp))) 304 return (error); 305 mp = vp->v_mount; 306 vput(vp); 307 if ((error = VFS_STATVFS(mp, &sbuf, l)) != 0) 308 return (error); 309 return vfs2fs(SCARG(uap, buf), &sbuf); 310 } 311
Indexes created Sat Oct 18 23:09:54 GMT 2025