ultrix_fs.c revision 1.18
1 /* $NetBSD: ultrix_fs.c,v 1.18 2000/03/30 11:27:21 augustss 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 #include <nfs/nfsmount.h> 49 50 #include <ufs/ufs/quota.h> 51 #include <ufs/ufs/ufsmount.h> 52 53 #include <sys/syscallargs.h> 54 #include <compat/ultrix/ultrix_syscallargs.h> 55 #include <compat/common/compat_util.h> 56 57 #include <vm/vm.h> 58 59 #define ULTRIX_MAXPATHLEN 1024 60 61 /** 62 ** Ultrix filesystem operations: mount(), getmnt(). 63 ** These are included purely so one can place an (ECOFF or ELF) 64 ** NetBSD/pmax kernel in an Ultrix root filesystem, boot it, 65 ** and over-write the Ultrix root parition with NetBSD binaries. 66 **/ 67 68 /* 69 * Ultrix file system data structure, as modified by 70 * Ultrix getmntent(). This structure is padded to 2560 bytes, for 71 * compatiblity with the size the Ultrix kernel and user apps expect. 72 */ 73 struct ultrix_fs_data { 74 u_int32_t ufsd_flags; /* how mounted */ 75 u_int32_t ufsd_mtsize; /* max transfer size in bytes */ 76 u_int32_t ufsd_otsize; /* optimal transfer size in bytes */ 77 u_int32_t ufsd_bsize; /* fs block size (bytes) for vm code */ 78 u_int32_t ufsd_fstype; /* see ../h/fs_types.h */ 79 u_int32_t ufsd_gtot; /* total number of gnodes */ 80 u_int32_t ufsd_gfree; /* # of free gnodes */ 81 u_int32_t ufsd_btot; /* total number of 1K blocks */ 82 u_int32_t ufsd_bfree; /* # of free 1K blocks */ 83 u_int32_t ufsd_bfreen; /* user consumable 1K blocks */ 84 u_int32_t ufsd_pgthresh; /* min size in bytes before paging*/ 85 int32_t ufsd_uid; /* uid that mounted me */ 86 int16_t ufsd_dev; /* major/minor of fs */ 87 int16_t ufsd_exroot; /* root mapping from exports */ 88 char ufsd_devname[ULTRIX_MAXPATHLEN + 4]; /* name of dev */ 89 char ufsd_path[ULTRIX_MAXPATHLEN + 4]; /* name of mnt point */ 90 u_int32_t ufsd_nupdate; /* number of writes */ 91 u_int32_t ufsd_pad[112]; /* pad to 2560 bytes. */ 92 }; 93 94 /* 95 * Get statistics on mounted filesystems. 96 */ 97 #if 0 98 struct ultrix_getmnt_args { 99 int32_t *start; 100 struct ultrix_fs_data *buf; 101 int32_t bufsize; 102 int32_t mode; 103 char *path; 104 }; 105 106 #endif 107 /* 108 * Ultrix getmnt() flags. 109 * The operation getmnt() should perform is incoded in the flag 110 * argument. There are two independent attributes. 111 * 112 * ULTRIX_NOSTAT_xxx will never hang, but it may not return 113 * up-to-date statistics. (For NFS clients, it returns whatever is 114 * in the cache.) ULTRIX_STAT_xxx returns up-to-date info but may 115 * hang (e.g., on dead NFS servers). 116 * 117 * ULTRIX_xxSTAT_ONE returns statistics on just one filesystem, determined 118 * by the parth argument. ULTRIX_xxSTAT_MANY ignores the path argument and 119 * returns info on as many filesystems fit in the structure. 120 * the start argument, which should be zero on the first call, 121 * can be used to iterate over all filesystems. 122 * 123 */ 124 #define ULTRIX_NOSTAT_MANY 1 125 #define ULTRIX_STAT_MANY 2 126 #define ULTRIX_STAT_ONE 3 127 #define ULTRIX_NOSTAT_ONE 4 128 129 /* 130 * Ultrix gnode-layer filesystem codes. 131 */ 132 #define ULTRIX_FSTYPE_UNKNOWN 0x0 133 #define ULTRIX_FSTYPE_ULTRIX 0x1 /* Ultrix UFS: basically 4.2bsd FFS */ 134 #define ULTRIX_FSTYPE_NFS 0x5 /* NFS v2 */ 135 136 /* 137 * Ultrix mount(2) options 138 */ 139 #define ULTRIX_NM_RONLY 0x0001 /* mount read-only */ 140 #define ULTRIX_NM_SOFT 0x0002 /* soft mount (hard is default) */ 141 #define ULTRIX_NM_WSIZE 0x0004 /* set write size */ 142 #define ULTRIX_NM_RSIZE 0x0008 /* set read size */ 143 #define ULTRIX_NM_TIMEO 0x0010 /* set initial timeout */ 144 #define ULTRIX_NM_RETRANS 0x0020 /* set number of request retrys */ 145 #define ULTRIX_NM_HOSTNAME 0x0040 /* set hostname for error printf */ 146 #define ULTRIX_NM_PGTHRESH 0x0080 /* set page threshold for exec */ 147 #define ULTRIX_NM_INT 0x0100 /* allow hard mount keyboard interrupts */ 148 #define ULTRIX_NM_NOAC 0x0200 /* don't cache attributes */ 149 150 151 static void 152 make_ultrix_mntent __P(( struct statfs *sp, struct ultrix_fs_data *tem)); 153 154 /* 155 * Construct an Ultrix getmnt() ultrix_fs_data from the native NetBSD 156 * struct statfs. 157 */ 158 static void 159 make_ultrix_mntent(sp, tem) 160 struct statfs *sp; 161 struct ultrix_fs_data *tem; 162 { 163 164 memset(tem, 0, sizeof (*tem)); 165 166 tem->ufsd_flags = sp->f_flags; /* XXX translate */ 167 tem->ufsd_mtsize = sp->f_bsize; /* XXX max transfer size */ 168 tem->ufsd_otsize = sp->f_iosize; 169 tem->ufsd_bsize = sp->f_bsize; 170 /* 171 * Translate file system type. NetBSD/1.1 has f_type zero, 172 * and uses an fstype string instead. 173 * For now, map types not in Ultrix (kernfs, null, procfs...) 174 * to UFS, since Ultrix mout will try and call mount_unknown 175 * for ULTRIX_FSTYPE_UNKNOWN, but lacks a mount_unknown binary. 176 */ 177 tem->ufsd_fstype = ULTRIX_FSTYPE_NFS; 178 if (strcmp(sp->f_fstypename, "ffs") == 0) 179 tem->ufsd_fstype = ULTRIX_FSTYPE_ULTRIX; 180 181 tem->ufsd_gtot = sp->f_files; /* total "gnodes" */ 182 tem->ufsd_gfree = sp->f_ffree; /* free "gnodes" */ 183 tem->ufsd_btot = sp->f_blocks; /* total 1k blocks */ 184 #ifdef needsmorethought /* XXX */ 185 /* tem->ufsd_bfree = sp->f_bfree; */ /* free 1k blocks */ 186 /* tem->ufsd_bfree = sp->f_bavail; */ /* free 1k blocks */ 187 #endif 188 189 tem->ufsd_bfreen = sp->f_bavail; /* blocks available to users */ 190 tem->ufsd_pgthresh = 0; /* not relevant */ 191 tem->ufsd_uid = 0; /* XXX kept where ?*/ 192 tem->ufsd_dev = 0; /* ?? */ 193 tem->ufsd_exroot = 0; /* ?? */ 194 strncpy(tem->ufsd_path, sp->f_mntonname, ULTRIX_MAXPATHLEN); 195 strncpy(tem->ufsd_devname, sp->f_mntfromname, ULTRIX_MAXPATHLEN); 196 #if 0 197 /* In NetBSD-1.1, filesystem type is unused and always 0 */ 198 printf("mntent: %s type %d\n", tem->ufsd_devname, tem->ufsd_fstype); 199 printf("mntent: %s tot %d free %d user%d\n", 200 tem->ufsd_devname, sp->f_blocks, sp->f_bfree, sp->f_bavail); 201 #endif 202 } 203 204 int 205 ultrix_sys_getmnt(p, v, retval) 206 struct proc *p; 207 void *v; 208 int *retval; 209 { 210 struct ultrix_sys_getmnt_args *uap = v; 211 struct mount *mp, *nmp; 212 struct statfs *sp; 213 struct ultrix_fs_data *sfsp; 214 char *path; 215 int mntflags; 216 int skip; 217 int start; 218 long count, maxcount; 219 int error = 0; 220 221 nmp = NULL; /* XXX keep gcc quiet */ 222 path = NULL; 223 error = 0; 224 maxcount = SCARG(uap, bufsize) / sizeof(struct ultrix_fs_data); 225 sfsp = SCARG(uap, buf); 226 227 if (SCARG(uap, mode) == ULTRIX_STAT_ONE || 228 SCARG(uap, mode) == ULTRIX_STAT_MANY) 229 mntflags = MNT_WAIT; 230 else 231 mntflags = MNT_NOWAIT; 232 233 if (SCARG(uap, mode) == ULTRIX_STAT_ONE || SCARG(uap, mode) == ULTRIX_NOSTAT_ONE) { 234 /* 235 * Only get info on mountpoints that matches the path 236 * provided. 237 */ 238 MALLOC(path, char *, MAXPATHLEN, M_TEMP, M_WAITOK); 239 if ((error = copyinstr(SCARG(uap, path), path, 240 MAXPATHLEN, NULL)) != 0) 241 goto bad; 242 maxcount = 1; 243 } else { 244 /* 245 * Get info on any mountpoints, somewhat like readdir(). 246 * Find out how many mount list entries to skip, and skip 247 * them. 248 */ 249 if ((error = copyin((caddr_t)SCARG(uap, start), &start, 250 sizeof(*SCARG(uap, start)))) != 0) 251 goto bad; 252 simple_lock(&mountlist_slock); 253 for (skip = start, mp = mountlist.cqh_first; 254 mp != (void*)&mountlist && skip-- > 0; mp = nmp) 255 nmp = mp->mnt_list.cqe_next; 256 simple_unlock(&mountlist_slock); 257 } 258 259 simple_lock(&mountlist_slock); 260 for (count = 0, mp = mountlist.cqh_first; 261 mp != (void*)&mountlist && count < maxcount; mp = nmp) { 262 if (vfs_busy(mp, LK_NOWAIT, &mountlist_slock)) { 263 nmp = mp->mnt_list.cqe_next; 264 continue; 265 } 266 if (sfsp != NULL) { 267 struct ultrix_fs_data tem; 268 sp = &mp->mnt_stat; 269 270 /* 271 * If requested, refresh the fsstat cache. 272 */ 273 if (mntflags != MNT_WAIT && 274 (error = VFS_STATFS(mp, sp, p)) != 0) 275 continue; 276 277 /* 278 * XXX what does this do? -- cgd 279 */ 280 sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK; 281 if (path == NULL || 282 strcmp(path, sp->f_mntonname) == 0) { 283 make_ultrix_mntent(sp, &tem); 284 if ((error = copyout((caddr_t)&tem, sfsp, 285 sizeof(tem))) != 0) 286 goto bad; 287 sfsp++; 288 count++; 289 } 290 } 291 simple_lock(&mountlist_slock); 292 nmp = mp->mnt_list.cqe_next; 293 vfs_unbusy(mp); 294 } 295 simple_unlock(&mountlist_slock); 296 297 if (sfsp != NULL && count > maxcount) 298 *retval = maxcount; 299 else 300 *retval = count; 301 302 bad: 303 if (path) 304 FREE(path, M_TEMP); 305 return (error); 306 } 307 308 309 310 /* Old-style inet sockaddr (no len field) as passed to Ultrix mount(2) */ 311 struct osockaddr_in { 312 short sin_family; 313 u_short sin_port; 314 struct in_addr sin_addr; 315 char sin_zero[8]; 316 }; 317 318 319 /* 320 * fstype-dependent structure passed to Ultrix mount(2) when 321 * mounting NFS filesystems 322 */ 323 struct ultrix_nfs_args { 324 struct osockaddr_in *addr; /* file server address */ 325 void *fh; /* file handle to be mounted */ 326 int flags; /* flags */ 327 int wsize; /* write size in bytes */ 328 int rsize; /* read size in bytes */ 329 int timeo; /* initial timeout in .1 secs */ 330 int retrans; /* times to retry send */ 331 char *hostname; /* server's hostname */ 332 char *optstr; /* string of nfs mount options*/ 333 int gfs_flags; /* gnode flags (ugh) */ 334 int pg_thresh; /* paging threshold ? */ 335 }; 336 337 338 /* 339 * fstype-dependent structure passed to Ultrix mount(2) when 340 * mounting local (4.2bsd FFS) filesystems 341 */ 342 struct ultrix_ufs_args { 343 u_long ufs_flags; /* mount flags?*/ 344 u_long ufs_pgthresh; /* minimum file size to page */ 345 }; 346 347 int 348 ultrix_sys_mount(p, v, retval) 349 struct proc *p; 350 void *v; 351 int *retval; 352 { 353 struct ultrix_sys_mount_args *uap = v; 354 355 int error; 356 int otype = SCARG(uap, type); 357 char fsname[MFSNAMELEN]; 358 char * fstype; 359 struct sys_mount_args nuap; 360 char *native_fstype; 361 362 caddr_t usp = stackgap_init(p->p_emul); 363 364 memset(&nuap, 0, sizeof(nuap)); 365 SCARG(&nuap, flags) = 0; 366 367 /* 368 * Translate Ultrix integer mount codes for UFS and NFS to 369 * NetBSD fstype strings. Other Ultrix filesystem types 370 * (msdos, DEC ods-2) are not supported. 371 * Copy resulting string out to userspace (on stack) 372 * so we can pass it to the native mount syscall. 373 */ 374 if (otype == ULTRIX_FSTYPE_ULTRIX) 375 fstype = "ufs"; 376 else if (otype == ULTRIX_FSTYPE_NFS) 377 fstype = "nfs"; 378 else 379 return (EINVAL); 380 381 /* Translate the Ultrix mount-readonly option parameter */ 382 if (SCARG(uap, rdonly)) 383 SCARG(&nuap, flags) |= MNT_RDONLY; 384 385 /* Copy string-ified version of mount type back out to user space */ 386 native_fstype = (char *)usp; 387 SCARG(&nuap, type) = native_fstype; 388 if ((error = copyout(fstype, native_fstype, 389 strlen(fstype)+1)) != 0) { 390 return (error); 391 } 392 usp += strlen(fstype)+1; 393 394 #ifdef later 395 parse ultrix mount option string and set NetBSD flags 396 #endif 397 SCARG(&nuap, path) = SCARG(uap, dir); 398 399 /* 400 * Translate fstype-dependent mount options from 401 * Ultrix format to native. 402 */ 403 if (otype == ULTRIX_FSTYPE_ULTRIX) { 404 /* attempt to mount a native, rather than 4.2bsd, ffs */ 405 struct ufs_args ua; 406 407 ua.fspec = SCARG(uap, special); 408 memset(&ua.export, 0, sizeof(ua.export)); 409 SCARG(&nuap, data) = usp; 410 411 if ((error = copyout(&ua, SCARG(&nuap, data), 412 sizeof ua)) !=0) { 413 return(error); 414 } 415 /* 416 * Ultrix mount has no MNT_UPDATE flag. 417 * Attempt to see if this is the root we're mounting, 418 * and if so, set MNT_UPDATE so we can mount / read-write. 419 */ 420 fsname[0] = 0; 421 if ((error = copyinstr((caddr_t)SCARG(&nuap, path), fsname, 422 sizeof fsname, (u_int*)0)) != 0) 423 return(error); 424 if (strcmp(fsname, "/") == 0) { 425 SCARG(&nuap, flags) |= MNT_UPDATE; 426 printf("COMPAT_ULTRIX: mount with MNT_UPDATE on %s\n", 427 fsname); 428 } 429 } else if (otype == ULTRIX_FSTYPE_NFS) { 430 struct ultrix_nfs_args una; 431 struct nfs_args na; 432 struct osockaddr_in osa; 433 struct sockaddr_in *sap = (struct sockaddr_in *)& osa; 434 435 memset(&osa, 0, sizeof(osa)); 436 memset(&una, 0, sizeof(una)); 437 if ((error = copyin(SCARG(uap, data), &una, sizeof una)) !=0) { 438 return (error); 439 } 440 /* 441 * This is the only syscall boundary the 442 * address of the server passes, so do backwards 443 * compatibility on 4.3style sockaddrs here. 444 */ 445 if ((error = copyin(una.addr, &osa, sizeof osa)) != 0) { 446 printf("ultrix_mount: nfs copyin osa\n"); 447 return (error); 448 } 449 sap->sin_family = (u_char)osa.sin_family; 450 sap->sin_len = sizeof(*sap); 451 /* allocate space above caller's stack for nfs_args */ 452 SCARG(&nuap, data) = usp; 453 usp += sizeof (na); 454 /* allocate space above caller's stack for server sockaddr */ 455 na.version = NFS_ARGSVERSION; 456 na.addr = (struct sockaddr *)usp; 457 usp += sizeof(*sap); 458 na.addrlen = sap->sin_len; 459 na.sotype = SOCK_DGRAM; 460 na.proto = IPPROTO_UDP; 461 na.fh = una.fh; 462 na.fhsize = NFSX_V2FH; 463 na.flags = /*una.flags;*/ NFSMNT_NOCONN | NFSMNT_RESVPORT; 464 na.wsize = una.wsize; 465 na.rsize = una.rsize; 466 na.timeo = una.timeo; 467 na.retrans = una.retrans; 468 na.hostname = una.hostname; 469 if ((error = copyout(sap, na.addr, sizeof (*sap) )) != 0) 470 return (error); 471 if ((error = copyout(&na, SCARG(&nuap, data), sizeof na)) != 0) 472 return (error); 473 } 474 return (sys_mount(p, &nuap, retval)); 475 } 476
Indexes created Thu Sep 25 16:09:42 GMT 2025