ultrix_fs.c revision 1.36
1 /* $NetBSD: ultrix_fs.c,v 1.36 2007/03/04 06:01:38 christos 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/cdefs.h> 36 __KERNEL_RCSID(0, "$NetBSD: ultrix_fs.c,v 1.36 2007/03/04 06:01:38 christos Exp $"); 37 38 #include <sys/param.h> 39 #include <sys/systm.h> 40 #include <sys/malloc.h> 41 #include <sys/exec.h> 42 #include <sys/namei.h> 43 #include <sys/mount.h> 44 #include <sys/proc.h> 45 #include <sys/vnode.h> 46 #include <sys/vnode_if.h> 47 #include <net/if.h> 48 #include <netinet/in.h> 49 50 #include <nfs/rpcv2.h> 51 #include <nfs/nfsproto.h> 52 #include <nfs/nfs.h> 53 #include <nfs/nfsmount.h> 54 55 #include <ufs/ufs/quota.h> 56 #include <ufs/ufs/ufsmount.h> 57 58 #include <sys/syscallargs.h> 59 #include <compat/ultrix/ultrix_syscallargs.h> 60 #include <compat/common/compat_util.h> 61 62 #define ULTRIX_MAXPATHLEN 1024 63 64 /** 65 ** Ultrix filesystem operations: mount(), getmnt(). 66 ** These are included purely so one can place an (ECOFF or ELF) 67 ** NetBSD/pmax kernel in an Ultrix root filesystem, boot it, 68 ** and over-write the Ultrix root parition with NetBSD binaries. 69 **/ 70 71 /* 72 * Ultrix file system data structure, as modified by 73 * Ultrix getmntent(). This structure is padded to 2560 bytes, for 74 * compatibility with the size the Ultrix kernel and user apps expect. 75 */ 76 struct ultrix_fs_data { 77 u_int32_t ufsd_flags; /* how mounted */ 78 u_int32_t ufsd_mtsize; /* max transfer size in bytes */ 79 u_int32_t ufsd_otsize; /* optimal transfer size in bytes */ 80 u_int32_t ufsd_bsize; /* fs block size (bytes) for vm code */ 81 u_int32_t ufsd_fstype; /* see ../h/fs_types.h */ 82 u_int32_t ufsd_gtot; /* total number of gnodes */ 83 u_int32_t ufsd_gfree; /* # of free gnodes */ 84 u_int32_t ufsd_btot; /* total number of 1K blocks */ 85 u_int32_t ufsd_bfree; /* # of free 1K blocks */ 86 u_int32_t ufsd_bfreen; /* user consumable 1K blocks */ 87 u_int32_t ufsd_pgthresh; /* min size in bytes before paging*/ 88 int32_t ufsd_uid; /* uid that mounted me */ 89 int16_t ufsd_dev; /* major/minor of fs */ 90 int16_t ufsd_exroot; /* root mapping from exports */ 91 char ufsd_devname[ULTRIX_MAXPATHLEN + 4]; /* name of dev */ 92 char ufsd_path[ULTRIX_MAXPATHLEN + 4]; /* name of mnt point */ 93 u_int32_t ufsd_nupdate; /* number of writes */ 94 u_int32_t ufsd_pad[112]; /* pad to 2560 bytes. */ 95 }; 96 97 /* 98 * Get statistics on mounted filesystems. 99 */ 100 #if 0 101 struct ultrix_getmnt_args { 102 int32_t *start; 103 struct ultrix_fs_data *buf; 104 int32_t bufsize; 105 int32_t mode; 106 char *path; 107 }; 108 109 #endif 110 /* 111 * Ultrix getmnt() flags. 112 * The operation getmnt() should perform is incoded in the flag 113 * argument. There are two independent attributes. 114 * 115 * ULTRIX_NOSTAT_xxx will never hang, but it may not return 116 * up-to-date statistics. (For NFS clients, it returns whatever is 117 * in the cache.) ULTRIX_STAT_xxx returns up-to-date info but may 118 * hang (e.g., on dead NFS servers). 119 * 120 * ULTRIX_xxSTAT_ONE returns statistics on just one filesystem, determined 121 * by the parth argument. ULTRIX_xxSTAT_MANY ignores the path argument and 122 * returns info on as many filesystems fit in the structure. 123 * the start argument, which should be zero on the first call, 124 * can be used to iterate over all filesystems. 125 * 126 */ 127 #define ULTRIX_NOSTAT_MANY 1 128 #define ULTRIX_STAT_MANY 2 129 #define ULTRIX_STAT_ONE 3 130 #define ULTRIX_NOSTAT_ONE 4 131 132 /* 133 * Ultrix gnode-layer filesystem codes. 134 */ 135 #define ULTRIX_FSTYPE_UNKNOWN 0x0 136 #define ULTRIX_FSTYPE_ULTRIX 0x1 /* Ultrix UFS: basically 4.2bsd FFS */ 137 #define ULTRIX_FSTYPE_NFS 0x5 /* NFS v2 */ 138 139 /* 140 * Ultrix mount(2) options 141 */ 142 #define ULTRIX_NM_RONLY 0x0001 /* mount read-only */ 143 #define ULTRIX_NM_SOFT 0x0002 /* soft mount (hard is default) */ 144 #define ULTRIX_NM_WSIZE 0x0004 /* set write size */ 145 #define ULTRIX_NM_RSIZE 0x0008 /* set read size */ 146 #define ULTRIX_NM_TIMEO 0x0010 /* set initial timeout */ 147 #define ULTRIX_NM_RETRANS 0x0020 /* set number of request retrys */ 148 #define ULTRIX_NM_HOSTNAME 0x0040 /* set hostname for error printf */ 149 #define ULTRIX_NM_PGTHRESH 0x0080 /* set page threshold for exec */ 150 #define ULTRIX_NM_INT 0x0100 /* allow hard mount keyboard interrupts */ 151 #define ULTRIX_NM_NOAC 0x0200 /* don't cache attributes */ 152 153 154 static void 155 make_ultrix_mntent(struct statvfs *, struct ultrix_fs_data *); 156 157 /* 158 * Construct an Ultrix getmnt() ultrix_fs_data from the native NetBSD 159 * struct statfs. 160 */ 161 static void 162 make_ultrix_mntent(struct statvfs *sp, struct ultrix_fs_data *tem) 163 { 164 165 memset(tem, 0, sizeof (*tem)); 166 167 tem->ufsd_flags = sp->f_flag; /* XXX translate */ 168 tem->ufsd_mtsize = sp->f_bsize; /* XXX max transfer size */ 169 tem->ufsd_otsize = sp->f_iosize; 170 tem->ufsd_bsize = sp->f_bsize; 171 /* 172 * Translate file system type. NetBSD/1.1 has f_type zero, 173 * and uses an fstype string instead. 174 * For now, map types not in Ultrix (kernfs, null, procfs...) 175 * to UFS, since Ultrix mout will try and call mount_unknown 176 * for ULTRIX_FSTYPE_UNKNOWN, but lacks a mount_unknown binary. 177 */ 178 tem->ufsd_fstype = ULTRIX_FSTYPE_NFS; 179 if (strcmp(sp->f_fstypename, "ffs") == 0) 180 tem->ufsd_fstype = ULTRIX_FSTYPE_ULTRIX; 181 182 tem->ufsd_gtot = sp->f_files; /* total "gnodes" */ 183 tem->ufsd_gfree = sp->f_ffree; /* free "gnodes" */ 184 tem->ufsd_btot = sp->f_blocks; /* total 1k blocks */ 185 #ifdef needsmorethought /* XXX */ 186 /* tem->ufsd_bfree = sp->f_bfree; */ /* free 1k blocks */ 187 /* tem->ufsd_bfree = sp->f_bavail; */ /* free 1k blocks */ 188 #endif 189 190 tem->ufsd_bfreen = sp->f_bavail; /* blocks available to users */ 191 tem->ufsd_pgthresh = 0; /* not relevant */ 192 tem->ufsd_uid = 0; /* XXX kept where ?*/ 193 tem->ufsd_dev = 0; /* ?? */ 194 tem->ufsd_exroot = 0; /* ?? */ 195 strncpy(tem->ufsd_path, sp->f_mntonname, ULTRIX_MAXPATHLEN); 196 strncpy(tem->ufsd_devname, sp->f_mntfromname, ULTRIX_MAXPATHLEN); 197 #if 0 198 /* In NetBSD-1.1, filesystem type is unused and always 0 */ 199 printf("mntent: %s type %d\n", tem->ufsd_devname, tem->ufsd_fstype); 200 printf("mntent: %s tot %d free %d user%d\n", 201 tem->ufsd_devname, sp->f_blocks, sp->f_bfree, sp->f_bavail); 202 #endif 203 } 204 205 int 206 ultrix_sys_getmnt(struct lwp *l, void *v, register_t *retval) 207 { 208 struct ultrix_sys_getmnt_args *uap = v; 209 struct mount *mp, *nmp; 210 struct statvfs *sp; 211 struct ultrix_fs_data *sfsp; 212 char *path; 213 int mntflags; 214 int skip; 215 int start; 216 long count, maxcount; 217 int error = 0; 218 219 nmp = NULL; /* XXX keep gcc quiet */ 220 path = NULL; 221 error = 0; 222 maxcount = SCARG(uap, bufsize) / sizeof(struct ultrix_fs_data); 223 sfsp = SCARG(uap, buf); 224 225 if (SCARG(uap, mode) == ULTRIX_STAT_ONE || 226 SCARG(uap, mode) == ULTRIX_STAT_MANY) 227 mntflags = MNT_WAIT; 228 else 229 mntflags = MNT_NOWAIT; 230 231 if (SCARG(uap, mode) == ULTRIX_STAT_ONE || SCARG(uap, mode) == ULTRIX_NOSTAT_ONE) { 232 /* 233 * Only get info on mountpoints that matches the path 234 * provided. 235 */ 236 MALLOC(path, char *, MAXPATHLEN, M_TEMP, M_WAITOK); 237 if ((error = copyinstr(SCARG(uap, path), path, 238 MAXPATHLEN, NULL)) != 0) 239 goto bad; 240 maxcount = 1; 241 } else { 242 /* 243 * Get info on any mountpoints, somewhat like readdir(). 244 * Find out how many mount list entries to skip, and skip 245 * them. 246 */ 247 if ((error = copyin((void *)SCARG(uap, start), &start, 248 sizeof(*SCARG(uap, start)))) != 0) 249 goto bad; 250 simple_lock(&mountlist_slock); 251 for (skip = start, mp = mountlist.cqh_first; 252 mp != (void*)&mountlist && skip-- > 0; mp = nmp) 253 nmp = mp->mnt_list.cqe_next; 254 simple_unlock(&mountlist_slock); 255 } 256 257 simple_lock(&mountlist_slock); 258 for (count = 0, mp = mountlist.cqh_first; 259 mp != (void*)&mountlist && count < maxcount; mp = nmp) { 260 if (vfs_busy(mp, LK_NOWAIT, &mountlist_slock)) { 261 nmp = mp->mnt_list.cqe_next; 262 continue; 263 } 264 if (sfsp != NULL) { 265 struct ultrix_fs_data tem; 266 sp = &mp->mnt_stat; 267 268 /* 269 * If requested, refresh the fsstat cache. 270 */ 271 if (mntflags != MNT_WAIT && 272 (error = VFS_STATVFS(mp, sp, l)) != 0) 273 continue; 274 275 /* 276 * XXX what does this do? -- cgd 277 */ 278 sp->f_flag = mp->mnt_flag & MNT_VISFLAGMASK; 279 if (path == NULL || 280 strcmp(path, sp->f_mntonname) == 0) { 281 make_ultrix_mntent(sp, &tem); 282 if ((error = copyout((void *)&tem, sfsp, 283 sizeof(tem))) != 0) 284 goto bad; 285 sfsp++; 286 count++; 287 } 288 } 289 simple_lock(&mountlist_slock); 290 nmp = mp->mnt_list.cqe_next; 291 vfs_unbusy(mp); 292 } 293 simple_unlock(&mountlist_slock); 294 295 if (sfsp != NULL && count > maxcount) 296 *retval = maxcount; 297 else 298 *retval = count; 299 300 bad: 301 if (path) 302 FREE(path, M_TEMP); 303 return (error); 304 } 305 306 307 308 /* Old-style inet sockaddr (no len field) as passed to Ultrix mount(2) */ 309 struct osockaddr_in { 310 short sin_family; 311 u_short sin_port; 312 struct in_addr sin_addr; 313 char sin_zero[8]; 314 }; 315 316 317 /* 318 * fstype-dependent structure passed to Ultrix mount(2) when 319 * mounting NFS filesystems 320 */ 321 struct ultrix_nfs_args { 322 struct osockaddr_in *addr; /* file server address */ 323 void *fh; /* file handle to be mounted */ 324 int flags; /* flags */ 325 int wsize; /* write size in bytes */ 326 int rsize; /* read size in bytes */ 327 int timeo; /* initial timeout in .1 secs */ 328 int retrans; /* times to retry send */ 329 char *hostname; /* server's hostname */ 330 char *optstr; /* string of nfs mount options*/ 331 int gfs_flags; /* gnode flags (ugh) */ 332 int pg_thresh; /* paging threshold ? */ 333 }; 334 335 336 /* 337 * fstype-dependent structure passed to Ultrix mount(2) when 338 * mounting local (4.2bsd FFS) filesystems 339 */ 340 struct ultrix_ufs_args { 341 u_long ufs_flags; /* mount flags?*/ 342 u_long ufs_pgthresh; /* minimum file size to page */ 343 }; 344 345 int 346 ultrix_sys_mount(struct lwp *l, void *v, register_t *retval) 347 { 348 struct ultrix_sys_mount_args *uap = v; 349 struct proc *p = l->l_proc; 350 int error; 351 int otype = SCARG(uap, type); 352 char fsname[MFSNAMELEN]; 353 const char *fstype; 354 struct sys_mount_args nuap; 355 char *native_fstype; 356 357 void *usp = stackgap_init(p, 0); 358 359 memset(&nuap, 0, sizeof(nuap)); 360 SCARG(&nuap, flags) = 0; 361 362 /* 363 * Translate Ultrix integer mount codes for UFS and NFS to 364 * NetBSD fstype strings. Other Ultrix filesystem types 365 * (msdos, DEC ods-2) are not supported. 366 * Copy resulting string out to userspace (on stack) 367 * so we can pass it to the native mount syscall. 368 */ 369 if (otype == ULTRIX_FSTYPE_ULTRIX) 370 fstype = "ufs"; 371 else if (otype == ULTRIX_FSTYPE_NFS) 372 fstype = "nfs"; 373 else 374 return (EINVAL); 375 376 /* Translate the Ultrix mount-readonly option parameter */ 377 if (SCARG(uap, rdonly)) 378 SCARG(&nuap, flags) |= MNT_RDONLY; 379 380 /* Copy string-ified version of mount type back out to user space */ 381 native_fstype = (char *)usp; 382 SCARG(&nuap, type) = native_fstype; 383 if ((error = copyout(fstype, native_fstype, 384 strlen(fstype)+1)) != 0) { 385 return (error); 386 } 387 usp += strlen(fstype)+1; 388 389 #ifdef later 390 parse ultrix mount option string and set NetBSD flags 391 #endif 392 SCARG(&nuap, path) = SCARG(uap, dir); 393 394 /* 395 * Translate fstype-dependent mount options from 396 * Ultrix format to native. 397 */ 398 if (otype == ULTRIX_FSTYPE_ULTRIX) { 399 /* attempt to mount a native, rather than 4.2bsd, ffs */ 400 struct ufs_args ua; 401 402 memset(&ua, 0, sizeof(ua)); 403 ua.fspec = SCARG(uap, special); 404 SCARG(&nuap, data) = usp; 405 406 if ((error = copyout(&ua, SCARG(&nuap, data), 407 sizeof ua)) !=0) { 408 return(error); 409 } 410 /* 411 * Ultrix mount has no MNT_UPDATE flag. 412 * Attempt to see if this is the root we're mounting, 413 * and if so, set MNT_UPDATE so we can mount / read-write. 414 */ 415 fsname[0] = 0; 416 if ((error = copyinstr(SCARG(&nuap, path), fsname, 417 sizeof fsname, NULL)) != 0) 418 return(error); 419 if (strcmp(fsname, "/") == 0) { 420 SCARG(&nuap, flags) |= MNT_UPDATE; 421 printf("COMPAT_ULTRIX: mount with MNT_UPDATE on %s\n", 422 fsname); 423 } 424 } else if (otype == ULTRIX_FSTYPE_NFS) { 425 struct ultrix_nfs_args una; 426 struct nfs_args na; 427 struct osockaddr_in osa; 428 struct sockaddr_in *sap = (struct sockaddr_in *)& osa; 429 430 memset(&osa, 0, sizeof(osa)); 431 memset(&una, 0, sizeof(una)); 432 if ((error = copyin(SCARG(uap, data), &una, sizeof una)) !=0) { 433 return (error); 434 } 435 /* 436 * This is the only syscall boundary the 437 * address of the server passes, so do backwards 438 * compatibility on 4.3style sockaddrs here. 439 */ 440 if ((error = copyin(una.addr, &osa, sizeof osa)) != 0) { 441 printf("ultrix_mount: nfs copyin osa\n"); 442 return (error); 443 } 444 sap->sin_family = (u_char)osa.sin_family; 445 sap->sin_len = sizeof(*sap); 446 /* allocate space above caller's stack for nfs_args */ 447 SCARG(&nuap, data) = usp; 448 usp += sizeof (na); 449 /* allocate space above caller's stack for server sockaddr */ 450 na.version = NFS_ARGSVERSION; 451 na.addr = (struct sockaddr *)usp; 452 usp += sizeof(*sap); 453 na.addrlen = sap->sin_len; 454 na.sotype = SOCK_DGRAM; 455 na.proto = IPPROTO_UDP; 456 na.fh = una.fh; 457 na.fhsize = NFSX_V2FH; 458 na.flags = /*una.flags;*/ NFSMNT_NOCONN | NFSMNT_RESVPORT; 459 na.wsize = una.wsize; 460 na.rsize = una.rsize; 461 na.timeo = una.timeo; 462 na.retrans = una.retrans; 463 na.hostname = una.hostname; 464 if ((error = copyout(sap, na.addr, sizeof (*sap) )) != 0) 465 return (error); 466 if ((error = copyout(&na, SCARG(&nuap, data), sizeof na)) != 0) 467 return (error); 468 } 469 return (sys_mount(l, &nuap, retval)); 470 } 471
Indexes created Thu Sep 25 16:09:42 GMT 2025