ultrix_fs.c revision 1.12
1 /* $NetBSD: ultrix_fs.c,v 1.12 1997/05/25 10:24:05 jonathan Exp $ */ 2 3 /* 4 * Copyright (c) 1995, 1997 Jonathan Stone 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 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Jonathan Stone for 18 * the NetBSD Project. 19 * 4. The name of the author may not be used to endorse or promote products 20 * derived from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/malloc.h> 38 #include <sys/exec.h> 39 #include <sys/namei.h> 40 #include <sys/mount.h> 41 #include <sys/proc.h> 42 #include <net/if.h> 43 #include <netinet/in.h> 44 45 #include <nfs/rpcv2.h> 46 #include <nfs/nfsproto.h> 47 #include <nfs/nfs.h> 48 49 #include <sys/syscallargs.h> 50 #include <compat/ultrix/ultrix_syscallargs.h> 51 #include <compat/common/compat_util.h> 52 53 #include <vm/vm.h> 54 55 #define ULTRIX_MAXPATHLEN 1024 56 57 /** 58 ** Ultrix filesystem operations: mount(), getmnt(). 59 ** These are included purely so one can place an (ECOFF or ELF) 60 ** NetBSD/pmax kernel in an Ultrix root filesystem, boot it, 61 ** and over-write the Ultrix root parition with NetBSD binaries. 62 **/ 63 64 /* 65 * Ultrix file system data structure, as modified by 66 * Ultrix getmntent(). This structure is padded to 2560 bytes, for 67 * compatiblity with the size the Ultrix kernel and user apps expect. 68 */ 69 struct ultrix_fs_data { 70 u_int32_t ufsd_flags; /* how mounted */ 71 u_int32_t ufsd_mtsize; /* max transfer size in bytes */ 72 u_int32_t ufsd_otsize; /* optimal transfer size in bytes */ 73 u_int32_t ufsd_bsize; /* fs block size (bytes) for vm code */ 74 u_int32_t ufsd_fstype; /* see ../h/fs_types.h */ 75 u_int32_t ufsd_gtot; /* total number of gnodes */ 76 u_int32_t ufsd_gfree; /* # of free gnodes */ 77 u_int32_t ufsd_btot; /* total number of 1K blocks */ 78 u_int32_t ufsd_bfree; /* # of free 1K blocks */ 79 u_int32_t ufsd_bfreen; /* user consumable 1K blocks */ 80 u_int32_t ufsd_pgthresh; /* min size in bytes before paging*/ 81 int32_t ufsd_uid; /* uid that mounted me */ 82 int16_t ufsd_dev; /* major/minor of fs */ 83 int16_t ufsd_exroot; /* root mapping from exports */ 84 char ufsd_devname[ULTRIX_MAXPATHLEN + 4]; /* name of dev */ 85 char ufsd_path[ULTRIX_MAXPATHLEN + 4]; /* name of mnt point */ 86 u_int32_t ufsd_nupdate; /* number of writes */ 87 u_int32_t ufsd_pad[112]; /* pad to 2560 bytes. */ 88 }; 89 90 /* 91 * Get statistics on mounted filesystems. 92 */ 93 #if 0 94 struct ultrix_getmnt_args { 95 int32_t *start; 96 struct ultrix_fs_data *buf; 97 int32_t bufsize; 98 int32_t mode; 99 char *path; 100 }; 101 102 #endif 103 /* 104 * Ultrix getmnt() flags. 105 * The operation getmnt() should perform is incoded in the flag 106 * argument. There are two independent attributes. 107 * 108 * ULTRIX_NOSTAT_xxx will never hang, but it may not return 109 * up-to-date statistics. (For NFS clients, it returns whatever is 110 * in the cache.) ULTRIX_STAT_xxx returns up-to-date info but may 111 * hang (e.g., on dead NFS servers). 112 * 113 * ULTRIX_xxSTAT_ONE returns statistics on just one filesystem, determined 114 * by the parth argument. ULTRIX_xxSTAT_MANY ignores the path argument and 115 * returns info on as many filesystems fit in the structure. 116 * the start argument, which should be zero on the first call, 117 * can be used to iterate over all filesystems. 118 * 119 */ 120 #define ULTRIX_NOSTAT_MANY 1 121 #define ULTRIX_STAT_MANY 2 122 #define ULTRIX_STAT_ONE 3 123 #define ULTRIX_NOSTAT_ONE 4 124 125 /* 126 * Ultrix gnode-layer filesystem codes. 127 */ 128 #define ULTRIX_FSTYPE_UNKNOWN 0x0 129 #define ULTRIX_FSTYPE_ULTRIX 0x1 /* Ultrix UFS: basically 4.2bsd FFS */ 130 #define ULTRIX_FSTYPE_NFS 0x5 /* NFS v2 */ 131 132 /* 133 * Ultrix mount(2) options 134 */ 135 #define ULTRIX_NM_RONLY 0x0001 /* mount read-only */ 136 #define ULTRIX_NM_SOFT 0x0002 /* soft mount (hard is default) */ 137 #define ULTRIX_NM_WSIZE 0x0004 /* set write size */ 138 #define ULTRIX_NM_RSIZE 0x0008 /* set read size */ 139 #define ULTRIX_NM_TIMEO 0x0010 /* set initial timeout */ 140 #define ULTRIX_NM_RETRANS 0x0020 /* set number of request retrys */ 141 #define ULTRIX_NM_HOSTNAME 0x0040 /* set hostname for error printf */ 142 #define ULTRIX_NM_PGTHRESH 0x0080 /* set page threshold for exec */ 143 #define ULTRIX_NM_INT 0x0100 /* allow hard mount keyboard interrupts */ 144 #define ULTRIX_NM_NOAC 0x0200 /* don't cache attributes */ 145 146 147 static void 148 make_ultrix_mntent __P(( struct statfs *sp, struct ultrix_fs_data *tem)); 149 150 /* 151 * Construct an Ultrix getmnt() ultrix_fs_data from the native NetBSD 152 * struct statfs. 153 */ 154 static void 155 make_ultrix_mntent(sp, tem) 156 register struct statfs *sp; 157 register struct ultrix_fs_data *tem; 158 { 159 160 bzero(tem, sizeof (*tem)); 161 162 tem->ufsd_flags = sp->f_flags; /* XXX translate */ 163 tem->ufsd_mtsize = sp->f_bsize; /* XXX max transfer size */ 164 tem->ufsd_otsize = sp->f_iosize; 165 tem->ufsd_bsize = sp->f_bsize; 166 /* 167 * Translate file system type. NetBSD/1.1 has f_type zero, 168 * and uses an fstype string instead. 169 * For now, map types not in Ultrix (kernfs, null, procfs...) 170 * to UFS, since Ultrix mout will try and call mount_unknown 171 * for ULTRIX_FSTYPE_UNKNOWN, but lacks a mount_unknown binary. 172 */ 173 tem->ufsd_fstype = ULTRIX_FSTYPE_NFS; 174 if (strcmp(sp->f_fstypename, "ffs") == 0) 175 tem->ufsd_fstype = ULTRIX_FSTYPE_ULTRIX; 176 177 tem->ufsd_gtot = sp->f_files; /* total "gnodes" */ 178 tem->ufsd_gfree = sp->f_ffree; /* free "gnodes" */ 179 tem->ufsd_btot = sp->f_blocks; /* total 1k blocks */ 180 #ifdef needsmorethought /* XXX */ 181 /* tem->ufsd_bfree = sp->f_bfree; */ /* free 1k blocks */ 182 /* tem->ufsd_bfree = sp->f_bavail; */ /* free 1k blocks */ 183 #endif 184 185 tem->ufsd_bfreen = sp->f_bavail; /* blocks available to users */ 186 tem->ufsd_pgthresh = 0; /* not relevant */ 187 tem->ufsd_uid = 0; /* XXX kept where ?*/ 188 tem->ufsd_dev = 0; /* ?? */ 189 tem->ufsd_exroot = 0; /* ?? */ 190 strncpy(tem->ufsd_path, sp->f_mntonname, ULTRIX_MAXPATHLEN); 191 strncpy(tem->ufsd_devname, sp->f_mntfromname, ULTRIX_MAXPATHLEN); 192 #if 0 193 /* In NetBSD-1.1, filesystem type is unused and always 0 */ 194 printf("mntent: %s type %d\n", tem->ufsd_devname, tem->ufsd_fstype); 195 printf("mntent: %s tot %d free %d user%d\n", 196 tem->ufsd_devname, sp->f_blocks, sp->f_bfree, sp->f_bavail); 197 #endif 198 } 199 200 int 201 ultrix_sys_getmnt(p, v, retval) 202 struct proc *p; 203 void *v; 204 int *retval; 205 { 206 struct ultrix_sys_getmnt_args *uap = v; 207 struct mount *mp, *nmp; 208 struct statfs *sp; 209 struct ultrix_fs_data *sfsp; 210 char *path; 211 int mntflags; 212 int skip; 213 int start; 214 long count, maxcount; 215 int error = 0; 216 217 path = NULL; 218 error = 0; 219 maxcount = SCARG(uap, bufsize) / sizeof(struct ultrix_fs_data); 220 sfsp = SCARG(uap, buf); 221 222 if (SCARG(uap, mode) == ULTRIX_STAT_ONE || 223 SCARG(uap, mode) == ULTRIX_STAT_MANY) 224 mntflags = MNT_WAIT; 225 else 226 mntflags = MNT_NOWAIT; 227 228 if (SCARG(uap, mode) == ULTRIX_STAT_ONE || SCARG(uap, mode) == ULTRIX_NOSTAT_ONE) { 229 /* 230 * Only get info on mountpoints that matches the path 231 * provided. 232 */ 233 MALLOC(path, char *, MAXPATHLEN, M_TEMP, M_WAITOK); 234 if ((error = copyinstr(SCARG(uap, path), path, 235 MAXPATHLEN, NULL)) != 0) 236 goto bad; 237 maxcount = 1; 238 } else { 239 /* 240 * Get info on any mountpoints, somewhat like readdir(). 241 * Find out how many mount list entries to skip, and skip 242 * them. 243 */ 244 if ((error = copyin((caddr_t)SCARG(uap, start), &start, 245 sizeof(*SCARG(uap, start)))) != 0) 246 goto bad; 247 for (skip = start, mp = mountlist.cqh_first; 248 mp != (void*)&mountlist && skip-- > 0; mp = nmp) 249 nmp = mp->mnt_list.cqe_next; 250 } 251 252 for (count = 0, mp = mountlist.cqh_first; 253 mp != (void*)&mountlist && count < maxcount; mp = nmp) { 254 nmp = mp->mnt_list.cqe_next; 255 if (sfsp != NULL && (mp->mnt_flag & MNT_MLOCK) == 0) { 256 struct ultrix_fs_data tem; 257 sp = &mp->mnt_stat; 258 259 /* 260 * If requested, refresh the fsstat cache. 261 */ 262 if ((mntflags & MNT_WAIT) != 0 && 263 (error = VFS_STATFS(mp, sp, p)) != 0) 264 continue; 265 266 /* 267 * XXX what does this do? -- cgd 268 */ 269 sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK; 270 if (path == NULL || 271 strcmp(path, sp->f_mntonname) == 0) { 272 make_ultrix_mntent(sp, &tem); 273 if ((error = copyout((caddr_t)&tem, sfsp, 274 sizeof(tem))) != 0) 275 goto bad; 276 sfsp++; 277 count++; 278 } 279 } 280 } 281 282 if (sfsp != NULL && count > maxcount) 283 *retval = maxcount; 284 else 285 *retval = count; 286 287 bad: 288 if (path) 289 FREE(path, M_TEMP); 290 return (error); 291 } 292 293 294 295 /* Old-style inet sockaddr (no len field) as passed to Ultrix mount(2) */ 296 struct osockaddr_in { 297 short sin_family; 298 u_short sin_port; 299 struct in_addr sin_addr; 300 char sin_zero[8]; 301 }; 302 303 304 /* 305 * fstype-dependent structure passed to Ultrix mount(2) when 306 * mounting NFS filesystems 307 */ 308 struct ultrix_nfs_args { 309 struct osockaddr_in *addr; /* file server address */ 310 void *fh; /* file handle to be mounted */ 311 int flags; /* flags */ 312 int wsize; /* write size in bytes */ 313 int rsize; /* read size in bytes */ 314 int timeo; /* initial timeout in .1 secs */ 315 int retrans; /* times to retry send */ 316 char *hostname; /* server's hostname */ 317 char *optstr; /* string of nfs mount options*/ 318 int gfs_flags; /* gnode flags (ugh) */ 319 int pg_thresh; /* paging threshold ? */ 320 }; 321 322 323 /* 324 * fstype-dependent structure passed to Ultrix mount(2) when 325 * mounting local (4.2bsd FFS) filesystems 326 */ 327 struct ultrix_ufs_args { 328 u_long ufs_flags; /* mount flags?*/ 329 u_long ufs_pgthresh; /* minimum file size to page */ 330 }; 331 332 int 333 ultrix_sys_mount(p, v, retval) 334 struct proc *p; 335 void *v; 336 int *retval; 337 { 338 struct ultrix_sys_mount_args *uap = v; 339 340 int error; 341 int otype = SCARG(uap, type); 342 char fsname[MFSNAMELEN]; 343 char * fstype; 344 struct sys_mount_args nuap; 345 char *native_fstype; 346 347 caddr_t usp = stackgap_init(p->p_emul); 348 349 bzero(&nuap, sizeof(nuap)); 350 SCARG(&nuap, flags) = 0; 351 352 /* 353 * Translate Ultrix integer mount codes for UFS and NFS to 354 * NetBSD fstype strings. Other Ultrix filesystem types 355 * (msdos, DEC ods-2) are not supported. 356 * Copy resulting string out to userspace (on stack) 357 * so we can pass it to the native mount syscall. 358 */ 359 if (otype == ULTRIX_FSTYPE_ULTRIX) 360 fstype = "ufs"; 361 else if (otype == ULTRIX_FSTYPE_NFS) 362 fstype = "nfs"; 363 else 364 return (EINVAL); 365 366 /* Translate the Ultrix mount-readonly option parameter */ 367 if (SCARG(uap, rdonly)) 368 SCARG(&nuap, flags) |= MNT_RDONLY; 369 370 /* Copy string-ified version of mount type back out to user space */ 371 native_fstype = (char *)usp; 372 SCARG(&nuap, type) = native_fstype; 373 if ((error = copyout(fstype, native_fstype, 374 strlen(fstype)+1)) != 0) { 375 return (error); 376 } 377 usp += strlen(fstype)+1; 378 379 #ifdef later 380 parse ultrix mount option string and set NetBSD flags 381 #endif 382 SCARG(&nuap, path) = SCARG(uap, dir); 383 384 /* 385 * Translate fstype-dependent mount options from 386 * Ultrix format to native. 387 */ 388 if (otype == ULTRIX_FSTYPE_ULTRIX) { 389 /* attempt to mount a native, rather than 4.2bsd, ffs */ 390 struct ufs_args ua; 391 392 ua.fspec = SCARG(uap, special); 393 bzero(&ua.export, sizeof(ua.export)); 394 SCARG(&nuap, data) = usp; 395 396 if ((error = copyout(&ua, SCARG(&nuap, data), 397 sizeof ua)) !=0) { 398 return(error); 399 } 400 /* 401 * Ultrix mount has no MNT_UPDATE flag. 402 * Attempt to see if this is the root we're mounting, 403 * and if so, set MNT_UPDATE so we can mount / read-write. 404 */ 405 fsname[0] = 0; 406 if ((error = copyinstr((caddr_t)SCARG(&nuap, path), fsname, 407 sizeof fsname, (u_int*)0)) != 0) 408 return(error); 409 if (strcmp(fsname, "/") == 0) { 410 SCARG(&nuap, flags) |= MNT_UPDATE; 411 printf("COMPAT_ULTRIX: mount with MNT_UPDATE on %s\n", 412 fsname); 413 } 414 } else if (otype == ULTRIX_FSTYPE_NFS) { 415 struct ultrix_nfs_args una; 416 struct nfs_args na; 417 struct osockaddr_in osa; 418 struct sockaddr_in *sap = (struct sockaddr_in *)& osa; 419 420 bzero(&osa, sizeof(osa)); 421 bzero(&una, sizeof(una)); 422 if ((error = copyin(SCARG(uap, data), &una, sizeof una)) !=0) { 423 return (error); 424 } 425 /* 426 * This is the only syscall boundary the 427 * address of the server passes, so do backwards 428 * compatibility on 4.3style sockaddrs here. 429 */ 430 if ((error = copyin(una.addr, &osa, sizeof osa)) != 0) { 431 printf("ultrix_mount: nfs copyin osa\n"); 432 return (error); 433 } 434 sap->sin_family = (u_char)osa.sin_family; 435 sap->sin_len = sizeof(*sap); 436 /* allocate space above caller's stack for nfs_args */ 437 SCARG(&nuap, data) = usp; 438 usp += sizeof (na); 439 /* allocate space above caller's stack for server sockaddr */ 440 na.version = NFS_ARGSVERSION; 441 na.addr = (struct sockaddr *)usp; 442 usp += sizeof(*sap); 443 na.addrlen = sap->sin_len; 444 na.sotype = SOCK_DGRAM; 445 na.proto = IPPROTO_UDP; 446 na.fh = una.fh; 447 na.fhsize = NFSX_V2FH; 448 na.flags = /*una.flags;*/ NFSMNT_NOCONN | NFSMNT_RESVPORT; 449 na.wsize = una.wsize; 450 na.rsize = una.rsize; 451 na.timeo = una.timeo; 452 na.retrans = una.retrans; 453 na.hostname = una.hostname; 454 if ((error = copyout(sap, na.addr, sizeof (*sap) )) != 0) 455 return (error); 456 if ((error = copyout(&na, SCARG(&nuap, data), sizeof na)) != 0) 457 return (error); 458 } 459 return (sys_mount(p, &nuap, retval)); 460 } 461
Indexes created Thu Sep 25 16:09:42 GMT 2025