ultrix_fs.c revision 1.32
1 /* $NetBSD: ultrix_fs.c,v 1.32 2005/08/31 16:01:56 he 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 1.32 2005/08/31 16:01:56 he 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/sa.h> 59 #include <sys/syscallargs.h> 60 #include <compat/ultrix/ultrix_syscallargs.h> 61 #include <compat/common/compat_util.h> 62 63 #define ULTRIX_MAXPATHLEN 1024 64 65 /** 66 ** Ultrix filesystem operations: mount(), getmnt(). 67 ** These are included purely so one can place an (ECOFF or ELF) 68 ** NetBSD/pmax kernel in an Ultrix root filesystem, boot it, 69 ** and over-write the Ultrix root parition with NetBSD binaries. 70 **/ 71 72 /* 73 * Ultrix file system data structure, as modified by 74 * Ultrix getmntent(). This structure is padded to 2560 bytes, for 75 * compatibility with the size the Ultrix kernel and user apps expect. 76 */ 77 struct ultrix_fs_data { 78 u_int32_t ufsd_flags; /* how mounted */ 79 u_int32_t ufsd_mtsize; /* max transfer size in bytes */ 80 u_int32_t ufsd_otsize; /* optimal transfer size in bytes */ 81 u_int32_t ufsd_bsize; /* fs block size (bytes) for vm code */ 82 u_int32_t ufsd_fstype; /* see ../h/fs_types.h */ 83 u_int32_t ufsd_gtot; /* total number of gnodes */ 84 u_int32_t ufsd_gfree; /* # of free gnodes */ 85 u_int32_t ufsd_btot; /* total number of 1K blocks */ 86 u_int32_t ufsd_bfree; /* # of free 1K blocks */ 87 u_int32_t ufsd_bfreen; /* user consumable 1K blocks */ 88 u_int32_t ufsd_pgthresh; /* min size in bytes before paging*/ 89 int32_t ufsd_uid; /* uid that mounted me */ 90 int16_t ufsd_dev; /* major/minor of fs */ 91 int16_t ufsd_exroot; /* root mapping from exports */ 92 char ufsd_devname[ULTRIX_MAXPATHLEN + 4]; /* name of dev */ 93 char ufsd_path[ULTRIX_MAXPATHLEN + 4]; /* name of mnt point */ 94 u_int32_t ufsd_nupdate; /* number of writes */ 95 u_int32_t ufsd_pad[112]; /* pad to 2560 bytes. */ 96 }; 97 98 /* 99 * Get statistics on mounted filesystems. 100 */ 101 #if 0 102 struct ultrix_getmnt_args { 103 int32_t *start; 104 struct ultrix_fs_data *buf; 105 int32_t bufsize; 106 int32_t mode; 107 char *path; 108 }; 109 110 #endif 111 /* 112 * Ultrix getmnt() flags. 113 * The operation getmnt() should perform is incoded in the flag 114 * argument. There are two independent attributes. 115 * 116 * ULTRIX_NOSTAT_xxx will never hang, but it may not return 117 * up-to-date statistics. (For NFS clients, it returns whatever is 118 * in the cache.) ULTRIX_STAT_xxx returns up-to-date info but may 119 * hang (e.g., on dead NFS servers). 120 * 121 * ULTRIX_xxSTAT_ONE returns statistics on just one filesystem, determined 122 * by the parth argument. ULTRIX_xxSTAT_MANY ignores the path argument and 123 * returns info on as many filesystems fit in the structure. 124 * the start argument, which should be zero on the first call, 125 * can be used to iterate over all filesystems. 126 * 127 */ 128 #define ULTRIX_NOSTAT_MANY 1 129 #define ULTRIX_STAT_MANY 2 130 #define ULTRIX_STAT_ONE 3 131 #define ULTRIX_NOSTAT_ONE 4 132 133 /* 134 * Ultrix gnode-layer filesystem codes. 135 */ 136 #define ULTRIX_FSTYPE_UNKNOWN 0x0 137 #define ULTRIX_FSTYPE_ULTRIX 0x1 /* Ultrix UFS: basically 4.2bsd FFS */ 138 #define ULTRIX_FSTYPE_NFS 0x5 /* NFS v2 */ 139 140 /* 141 * Ultrix mount(2) options 142 */ 143 #define ULTRIX_NM_RONLY 0x0001 /* mount read-only */ 144 #define ULTRIX_NM_SOFT 0x0002 /* soft mount (hard is default) */ 145 #define ULTRIX_NM_WSIZE 0x0004 /* set write size */ 146 #define ULTRIX_NM_RSIZE 0x0008 /* set read size */ 147 #define ULTRIX_NM_TIMEO 0x0010 /* set initial timeout */ 148 #define ULTRIX_NM_RETRANS 0x0020 /* set number of request retrys */ 149 #define ULTRIX_NM_HOSTNAME 0x0040 /* set hostname for error printf */ 150 #define ULTRIX_NM_PGTHRESH 0x0080 /* set page threshold for exec */ 151 #define ULTRIX_NM_INT 0x0100 /* allow hard mount keyboard interrupts */ 152 #define ULTRIX_NM_NOAC 0x0200 /* don't cache attributes */ 153 154 155 static void 156 make_ultrix_mntent(struct statvfs *, struct ultrix_fs_data *); 157 158 /* 159 * Construct an Ultrix getmnt() ultrix_fs_data from the native NetBSD 160 * struct statfs. 161 */ 162 static void 163 make_ultrix_mntent(struct statvfs *sp, struct ultrix_fs_data *tem) 164 { 165 166 memset(tem, 0, sizeof (*tem)); 167 168 tem->ufsd_flags = sp->f_flag; /* XXX translate */ 169 tem->ufsd_mtsize = sp->f_bsize; /* XXX max transfer size */ 170 tem->ufsd_otsize = sp->f_iosize; 171 tem->ufsd_bsize = sp->f_bsize; 172 /* 173 * Translate file system type. NetBSD/1.1 has f_type zero, 174 * and uses an fstype string instead. 175 * For now, map types not in Ultrix (kernfs, null, procfs...) 176 * to UFS, since Ultrix mout will try and call mount_unknown 177 * for ULTRIX_FSTYPE_UNKNOWN, but lacks a mount_unknown binary. 178 */ 179 tem->ufsd_fstype = ULTRIX_FSTYPE_NFS; 180 if (strcmp(sp->f_fstypename, "ffs") == 0) 181 tem->ufsd_fstype = ULTRIX_FSTYPE_ULTRIX; 182 183 tem->ufsd_gtot = sp->f_files; /* total "gnodes" */ 184 tem->ufsd_gfree = sp->f_ffree; /* free "gnodes" */ 185 tem->ufsd_btot = sp->f_blocks; /* total 1k blocks */ 186 #ifdef needsmorethought /* XXX */ 187 /* tem->ufsd_bfree = sp->f_bfree; */ /* free 1k blocks */ 188 /* tem->ufsd_bfree = sp->f_bavail; */ /* free 1k blocks */ 189 #endif 190 191 tem->ufsd_bfreen = sp->f_bavail; /* blocks available to users */ 192 tem->ufsd_pgthresh = 0; /* not relevant */ 193 tem->ufsd_uid = 0; /* XXX kept where ?*/ 194 tem->ufsd_dev = 0; /* ?? */ 195 tem->ufsd_exroot = 0; /* ?? */ 196 strncpy(tem->ufsd_path, sp->f_mntonname, ULTRIX_MAXPATHLEN); 197 strncpy(tem->ufsd_devname, sp->f_mntfromname, ULTRIX_MAXPATHLEN); 198 #if 0 199 /* In NetBSD-1.1, filesystem type is unused and always 0 */ 200 printf("mntent: %s type %d\n", tem->ufsd_devname, tem->ufsd_fstype); 201 printf("mntent: %s tot %d free %d user%d\n", 202 tem->ufsd_devname, sp->f_blocks, sp->f_bfree, sp->f_bavail); 203 #endif 204 } 205 206 int 207 ultrix_sys_getmnt(struct lwp *l, void *v, register_t *retval) 208 { 209 struct ultrix_sys_getmnt_args *uap = v; 210 struct proc *p = l->l_proc; 211 struct mount *mp, *nmp; 212 struct statvfs *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_STATVFS(mp, sp, p)) != 0) 275 continue; 276 277 /* 278 * XXX what does this do? -- cgd 279 */ 280 sp->f_flag = 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(struct lwp *l, void *v, register_t *retval) 349 { 350 struct ultrix_sys_mount_args *uap = v; 351 struct proc *p = l->l_proc; 352 int error; 353 int otype = SCARG(uap, type); 354 char fsname[MFSNAMELEN]; 355 const char *fstype; 356 struct sys_mount_args nuap; 357 char *native_fstype; 358 359 caddr_t usp = stackgap_init(p, 0); 360 361 memset(&nuap, 0, sizeof(nuap)); 362 SCARG(&nuap, flags) = 0; 363 364 /* 365 * Translate Ultrix integer mount codes for UFS and NFS to 366 * NetBSD fstype strings. Other Ultrix filesystem types 367 * (msdos, DEC ods-2) are not supported. 368 * Copy resulting string out to userspace (on stack) 369 * so we can pass it to the native mount syscall. 370 */ 371 if (otype == ULTRIX_FSTYPE_ULTRIX) 372 fstype = "ufs"; 373 else if (otype == ULTRIX_FSTYPE_NFS) 374 fstype = "nfs"; 375 else 376 return (EINVAL); 377 378 /* Translate the Ultrix mount-readonly option parameter */ 379 if (SCARG(uap, rdonly)) 380 SCARG(&nuap, flags) |= MNT_RDONLY; 381 382 /* Copy string-ified version of mount type back out to user space */ 383 native_fstype = (char *)usp; 384 SCARG(&nuap, type) = native_fstype; 385 if ((error = copyout(fstype, native_fstype, 386 strlen(fstype)+1)) != 0) { 387 return (error); 388 } 389 usp += strlen(fstype)+1; 390 391 #ifdef later 392 parse ultrix mount option string and set NetBSD flags 393 #endif 394 SCARG(&nuap, path) = SCARG(uap, dir); 395 396 /* 397 * Translate fstype-dependent mount options from 398 * Ultrix format to native. 399 */ 400 if (otype == ULTRIX_FSTYPE_ULTRIX) { 401 /* attempt to mount a native, rather than 4.2bsd, ffs */ 402 struct ufs_args ua; 403 404 ua.fspec = SCARG(uap, special); 405 memset(&ua.export, 0, sizeof(ua.export)); 406 SCARG(&nuap, data) = usp; 407 408 if ((error = copyout(&ua, SCARG(&nuap, data), 409 sizeof ua)) !=0) { 410 return(error); 411 } 412 /* 413 * Ultrix mount has no MNT_UPDATE flag. 414 * Attempt to see if this is the root we're mounting, 415 * and if so, set MNT_UPDATE so we can mount / read-write. 416 */ 417 fsname[0] = 0; 418 if ((error = copyinstr(SCARG(&nuap, path), fsname, 419 sizeof fsname, NULL)) != 0) 420 return(error); 421 if (strcmp(fsname, "/") == 0) { 422 SCARG(&nuap, flags) |= MNT_UPDATE; 423 printf("COMPAT_ULTRIX: mount with MNT_UPDATE on %s\n", 424 fsname); 425 } 426 } else if (otype == ULTRIX_FSTYPE_NFS) { 427 struct ultrix_nfs_args una; 428 struct nfs_args na; 429 struct osockaddr_in osa; 430 struct sockaddr_in *sap = (struct sockaddr_in *)& osa; 431 432 memset(&osa, 0, sizeof(osa)); 433 memset(&una, 0, sizeof(una)); 434 if ((error = copyin(SCARG(uap, data), &una, sizeof una)) !=0) { 435 return (error); 436 } 437 /* 438 * This is the only syscall boundary the 439 * address of the server passes, so do backwards 440 * compatibility on 4.3style sockaddrs here. 441 */ 442 if ((error = copyin(una.addr, &osa, sizeof osa)) != 0) { 443 printf("ultrix_mount: nfs copyin osa\n"); 444 return (error); 445 } 446 sap->sin_family = (u_char)osa.sin_family; 447 sap->sin_len = sizeof(*sap); 448 /* allocate space above caller's stack for nfs_args */ 449 SCARG(&nuap, data) = usp; 450 usp += sizeof (na); 451 /* allocate space above caller's stack for server sockaddr */ 452 na.version = NFS_ARGSVERSION; 453 na.addr = (struct sockaddr *)usp; 454 usp += sizeof(*sap); 455 na.addrlen = sap->sin_len; 456 na.sotype = SOCK_DGRAM; 457 na.proto = IPPROTO_UDP; 458 na.fh = una.fh; 459 na.fhsize = NFSX_V2FH; 460 na.flags = /*una.flags;*/ NFSMNT_NOCONN | NFSMNT_RESVPORT; 461 na.wsize = una.wsize; 462 na.rsize = una.rsize; 463 na.timeo = una.timeo; 464 na.retrans = una.retrans; 465 na.hostname = una.hostname; 466 if ((error = copyout(sap, na.addr, sizeof (*sap) )) != 0) 467 return (error); 468 if ((error = copyout(&na, SCARG(&nuap, data), sizeof na)) != 0) 469 return (error); 470 } 471 return (sys_mount(l, &nuap, retval)); 472 } 473
Indexes created Fri Sep 26 08:10:20 GMT 2025