ultrix_fs.c revision 1.3
1 /* $NetBSD: ultrix_fs.c,v 1.3 1996/02/19 15:41:39 pk Exp $ */ 2 3 /* 4 * Copyright (c) 1995 5 * Jonathan Stone (hereinafter referred to as the author) 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. The name of the author may not be used to endorse or promote products 16 * derived from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31 #include <sys/param.h> 32 #include <sys/systm.h> 33 #include <sys/malloc.h> 34 #include <sys/exec.h> 35 #include <sys/namei.h> 36 #include <sys/mount.h> 37 #include <net/if.h> 38 #include <netinet/in.h> 39 40 #include <nfs/rpcv2.h> 41 #include <nfs/nfsproto.h> 42 #include <nfs/nfs.h> 43 44 #include <sys/syscallargs.h> 45 #include <compat/ultrix/ultrix_syscallargs.h> 46 47 #include <vm/vm.h> 48 49 #define ULTRIX_MAXPATHLEN 1024 50 51 /** 52 ** Ultrix filesystem operations: mount(), getmnt(). 53 ** These are included purely so one can place an (ECOFF or ELF) 54 ** NetBSD/pmax kernel in an Ultrix root filesystem, boot it, 55 ** and over-write the Ultrix root parition with NetBSD binaries. 56 **/ 57 58 /* 59 * Ultrix file system data structure, as modified by 60 * Ultrix getmntent(). This structure is padded to 2560 bytes, for 61 * compatiblity with the size the Ultrix kernel and user apps expect. 62 */ 63 struct ultrix_fs_data { 64 u_int32_t ufsd_flags; /* how mounted */ 65 u_int32_t ufsd_mtsize; /* max transfer size in bytes */ 66 u_int32_t ufsd_otsize; /* optimal transfer size in bytes */ 67 u_int32_t ufsd_bsize; /* fs block size (bytes) for vm code */ 68 u_int32_t ufsd_fstype; /* see ../h/fs_types.h */ 69 u_int32_t ufsd_gtot; /* total number of gnodes */ 70 u_int32_t ufsd_gfree; /* # of free gnodes */ 71 u_int32_t ufsd_btot; /* total number of 1K blocks */ 72 u_int32_t ufsd_bfree; /* # of free 1K blocks */ 73 u_int32_t ufsd_bfreen; /* user consumable 1K blocks */ 74 u_int32_t ufsd_pgthresh; /* min size in bytes before paging*/ 75 int32_t ufsd_uid; /* uid that mounted me */ 76 int16_t ufsd_dev; /* major/minor of fs */ 77 int16_t ufsd_exroot; /* root mapping from exports */ 78 char ufsd_devname[ULTRIX_MAXPATHLEN + 4]; /* name of dev */ 79 char ufsd_path[ULTRIX_MAXPATHLEN + 4]; /* name of mnt point */ 80 u_int32_t ufsd_nupdate; /* number of writes */ 81 u_int32_t ufsd_pad[112]; /* pad to 2560 bytes. */ 82 }; 83 84 /* 85 * Get statistics on mounted filesystems. 86 */ 87 #if 0 88 struct ultrix_getmnt_args { 89 int32_t *start; 90 struct ultrix_fs_data *buf; 91 int32_t bufsize; 92 int32_t mode; 93 char *path; 94 }; 95 96 #endif 97 /* 98 * Ultrix getmnt() flags. 99 * The operation getmnt() should perform is incoded in the flag 100 * argument. There are two independent attributes. 101 * 102 * ULTRIX_NOSTAT_xxx will never hang, but it may not return 103 * up-to-date statistics. (For NFS clients, it returns whatever is 104 * in the cache.) ULTRIX_STAT_xxx returns up-to-date info but may 105 * hang (e.g., on dead NFS servers). 106 * 107 * ULTRIX_xxSTAT_ONE returns statistics on just one filesystem, determined 108 * by the parth argument. ULTRIX_xxSTAT_MANY ignores the path argument and 109 * returns info on as many filesystems fit in the structure. 110 * the start argument, which should be zero on the first call, 111 * can be used to iterate over all filesystems. 112 * 113 */ 114 #define ULTRIX_NOSTAT_MANY 1 115 #define ULTRIX_STAT_MANY 2 116 #define ULTRIX_STAT_ONE 3 117 #define ULTRIX_NOSTAT_ONE 4 118 119 /* 120 * Ultrix gnode-layer filesystem codes. 121 */ 122 #define ULTRIX_FSTYPE_UNKNOWN 0x0 123 #define ULTRIX_FSTYPE_ULTRIX 0x1 /* Ultrix UFS: basically 4.2bsd FFS */ 124 #define ULTRIX_FSTYPE_NFS 0x5 /* NFS v2 */ 125 126 /* 127 * Ultrix mount(2) options 128 */ 129 #define ULTRIX_NM_RONLY 0x0001 /* mount read-only */ 130 #define ULTRIX_NM_SOFT 0x0002 /* soft mount (hard is default) */ 131 #define ULTRIX_NM_WSIZE 0x0004 /* set write size */ 132 #define ULTRIX_NM_RSIZE 0x0008 /* set read size */ 133 #define ULTRIX_NM_TIMEO 0x0010 /* set initial timeout */ 134 #define ULTRIX_NM_RETRANS 0x0020 /* set number of request retrys */ 135 #define ULTRIX_NM_HOSTNAME 0x0040 /* set hostname for error printf */ 136 #define ULTRIX_NM_PGTHRESH 0x0080 /* set page threshold for exec */ 137 #define ULTRIX_NM_INT 0x0100 /* allow hard mount keyboard interrupts */ 138 #define ULTRIX_NM_NOAC 0x0200 /* don't cache attributes */ 139 140 141 /* 142 * Construct an Ultrix getmnt() ultrix_fs_data from the native NetBSD 143 * struct statfs. 144 */ 145 static void 146 make_ultrix_mntent(sp, tem) 147 register struct statfs *sp; 148 register struct ultrix_fs_data *tem; 149 { 150 151 bzero(tem, sizeof (*tem)); 152 153 tem->ufsd_flags = sp->f_flags; /* XXX translate */ 154 tem->ufsd_mtsize = sp->f_bsize; /* XXX max transfer size */ 155 tem->ufsd_otsize = sp->f_iosize; 156 tem->ufsd_bsize = sp->f_bsize; 157 /* 158 * Translate file system type. NetBSD/1.1 has f_type zero, 159 * and uses an fstype string instead. 160 * For now, map types not in Ultrix (kernfs, null, procfs...) 161 * to UFS, since Ultrix mout will try and call mount_unknown 162 * for ULTRIX_FSTYPE_UNKNOWN, but lacks a mount_unknown binary. 163 */ 164 tem->ufsd_fstype = ULTRIX_FSTYPE_NFS; 165 if (strcmp(sp->f_fstypename, "ffs") == 0) 166 tem->ufsd_fstype = ULTRIX_FSTYPE_ULTRIX; 167 168 tem->ufsd_gtot = sp->f_files; /* total "gnodes" */ 169 tem->ufsd_gfree = sp->f_ffree; /* free "gnodes"/ 170 tem->ufsd_btot = sp->f_blocks; /* total 1k blocks */ 171 /*tem->ufsd_bfree = sp->f_bfree; /* free 1k blocks */ 172 /*tem->ufsd_bfree = sp->f_bavail; /* free 1k blocks */ 173 tem->ufsd_bfreen = sp->f_bavail; /* blocks available to users */ 174 tem->ufsd_pgthresh = 0; /* not relevant */ 175 tem->ufsd_uid = 0; /* XXX kept where ?*/ 176 tem->ufsd_dev = 0; /* ?? */ 177 tem->ufsd_exroot = 0; /* ?? */ 178 strncpy(tem->ufsd_path, sp->f_mntonname, ULTRIX_MAXPATHLEN); 179 strncpy(tem->ufsd_devname, sp->f_mntfromname, ULTRIX_MAXPATHLEN); 180 #if 0 181 /* In NetBSD-1.1, filesystem type is unused and always 0 */ 182 printf("mntent: %s type %d\n", tem->ufsd_devname, tem->ufsd_fstype); 183 printf("mntent: %s tot %d free %d user%d\n", 184 tem->ufsd_devname, sp->f_blocks, sp->f_bfree, sp->f_bavail); 185 #endif 186 } 187 188 int 189 ultrix_sys_getmnt(p, v, retval) 190 struct proc *p; 191 void *v; 192 int *retval; 193 { 194 struct ultrix_sys_getmnt_args *uap = v; 195 struct mount *mp, *nmp; 196 struct statfs *sp; 197 struct ultrix_fs_data *sfsp; 198 char *path; 199 int mntflags; 200 int skip; 201 int start; 202 long count, maxcount; 203 int error = 0; 204 205 path = NULL; 206 error = 0; 207 maxcount = SCARG(uap, bufsize) / sizeof(struct ultrix_fs_data); 208 sfsp = SCARG(uap, buf); 209 210 if (SCARG(uap, mode) == ULTRIX_STAT_ONE || 211 SCARG(uap, mode) == ULTRIX_STAT_MANY) 212 mntflags = MNT_WAIT; 213 else 214 mntflags = MNT_NOWAIT; 215 216 if (SCARG(uap, mode) == ULTRIX_STAT_ONE || SCARG(uap, mode) == ULTRIX_NOSTAT_ONE) { 217 /* 218 * Only get info on mountpoints that matches the path 219 * provided. 220 */ 221 MALLOC(path, char *, MAXPATHLEN, M_TEMP, M_WAITOK); 222 if (error = copyinstr(SCARG(uap, path), path, MAXPATHLEN, NULL)) 223 goto bad; 224 maxcount = 1; 225 } else { 226 /* 227 * Get info on any mountpoints, somewhat like readdir(). 228 * Find out how many mount list entries to skip, and skip 229 * them. 230 */ 231 if (error = 232 copyin((caddr_t)SCARG(uap, start), &start, 233 sizeof(*SCARG(uap, start)))) 234 goto bad; 235 for (skip = start, mp = mountlist.cqh_first; 236 mp != (void*)&mountlist && skip-- > 0; mp = nmp) 237 nmp = mp->mnt_list.cqe_next; 238 } 239 240 for (count = 0, mp = mountlist.cqh_first; 241 mp != (void*)&mountlist && count < maxcount; mp = nmp) { 242 nmp = mp->mnt_list.cqe_next; 243 if (sfsp != NULL && (mp->mnt_flag & MNT_MLOCK) == 0) { 244 struct ultrix_fs_data tem; 245 sp = &mp->mnt_stat; 246 247 /* 248 * If requested, refresh the fsstat cache. 249 */ 250 if ((mntflags & MNT_WAIT) != 0 && 251 (error = VFS_STATFS(mp, sp, p)) != 0) 252 continue; 253 254 /* 255 * XXX what does this do? -- cgd 256 */ 257 sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK; 258 if (path == NULL || 259 strcmp(path, sp->f_mntonname) == 0) { 260 make_ultrix_mntent(sp, &tem); 261 if (error = 262 copyout((caddr_t)&tem, sfsp, sizeof(tem))) 263 goto bad; 264 sfsp++; 265 count++; 266 } 267 } 268 } 269 270 if (sfsp != NULL && count > maxcount) 271 *retval = maxcount; 272 else 273 *retval = count; 274 275 bad: 276 if (path) 277 FREE(path, M_TEMP); 278 return (error); 279 } 280 281 282 283 /* Old-style inet sockaddr (no len field) as passed to Ultrix mount(2) */ 284 struct osockaddr_in { 285 short sin_family; 286 u_short sin_port; 287 struct in_addr sin_addr; 288 char sin_zero[8]; 289 }; 290 291 292 /* 293 * fstype-dependent structure passed to Ultrix mount(2) when 294 * mounting NFS filesystems 295 */ 296 struct ultrix_nfs_args { 297 struct osockaddr_in *addr; /* file server address */ 298 void *fh; /* file handle to be mounted */ 299 int flags; /* flags */ 300 int wsize; /* write size in bytes */ 301 int rsize; /* read size in bytes */ 302 int timeo; /* initial timeout in .1 secs */ 303 int retrans; /* times to retry send */ 304 char *hostname; /* server's hostname */ 305 char *optstr; /* string of nfs mount options*/ 306 int gfs_flags; /* gnode flags (ugh) */ 307 int pg_thresh; /* paging threshold ? */ 308 }; 309 310 311 /* 312 * fstype-dependent structure passed to Ultrix mount(2) when 313 * mounting local (4.2bsd FFS) filesystems 314 */ 315 struct ultrix_ufs_args { 316 u_long ufs_flags; /* mount flags?*/ 317 u_long ufs_pgthresh; /* minimum file size to page */ 318 }; 319 320 int 321 ultrix_sys_mount(p, v, retval) 322 struct proc *p; 323 void *v; 324 int *retval; 325 { 326 struct ultrix_sys_mount_args *uap = v; 327 328 int error; 329 int otype = SCARG(uap, type); 330 extern char sigcode[], esigcode[]; 331 char fsname[MFSNAMELEN]; 332 char * fstype; 333 struct sys_mount_args nuap; 334 335 #define szsigcode (esigcode - sigcode) 336 caddr_t usp = (caddr_t)ALIGN(PS_STRINGS - szsigcode - STACKGAPLEN); 337 338 bzero(&nuap, sizeof(nuap)); 339 SCARG(&nuap, flags) = 0; 340 341 /* 342 * Translate Ultrix integer mount codes for UFS and NFS to 343 * NetBSD fstype strings. Other Ultrix filesystem types 344 * (msdos, DEC ods-2) are not supported. 345 */ 346 if (otype == ULTRIX_FSTYPE_ULTRIX) 347 fstype = "ufs"; 348 else if (otype == ULTRIX_FSTYPE_NFS) 349 fstype = "nfs"; 350 else 351 return (EINVAL); 352 353 /* Translate the Ultrix mount-readonly option parameter */ 354 if (SCARG(uap, rdonly)) 355 SCARG(&nuap, flags) |= MNT_RDONLY; 356 357 /* Copy string-ified version of mount type back out to user space */ 358 SCARG(&nuap, type) = (char *)usp; 359 if (error = copyout(fstype, SCARG(&nuap, type), strlen(fstype)+1)) { 360 return (error); 361 } 362 usp += strlen(fstype)+1; 363 364 #ifdef later 365 parse ultrix mount option string and set NetBSD flags 366 #endif 367 SCARG(&nuap, path) = SCARG(uap, dir); 368 369 if (otype == ULTRIX_FSTYPE_ULTRIX) { 370 /* attempt to mount a native, rather than 4.2bsd, ffs */ 371 struct ufs_args ua; 372 struct nameidata nd; 373 374 ua.fspec = SCARG(uap, special); 375 bzero(&ua.export, sizeof(ua.export)); 376 SCARG(&nuap, data) = usp; 377 378 if (error = copyout(&ua, SCARG(&nuap, data), sizeof ua)) { 379 return(error); 380 } 381 /* 382 * Ultrix mount has no MNT_UPDATE flag. 383 * Attempt to see if this is the root we're mounting, 384 * and if so, set MNT_UPDATE so we can mount / read-write. 385 */ 386 fsname[0] = 0; 387 if (error = copyinstr((caddr_t)SCARG(&nuap, path), fsname, 388 sizeof fsname, (u_int*)0)) 389 return(error); 390 if (strcmp(fsname, "/") == 0) { 391 SCARG(&nuap, flags) |= MNT_UPDATE; 392 printf("COMPAT_ULTRIX: mount with MNT_UPDATE on %s\n", 393 fsname); 394 } 395 } else if (otype == ULTRIX_FSTYPE_NFS) { 396 struct ultrix_nfs_args una; 397 struct nfs_args na; 398 struct osockaddr_in osa; 399 struct sockaddr_in *sap = (struct sockaddr_in *)& osa; 400 401 bzero(&osa, sizeof(osa)); 402 bzero(&una, sizeof(una)); 403 if (error = copyin(SCARG(uap, data), &una, sizeof una)) { 404 return (error); 405 } 406 /* 407 * This is the only syscall boundary the 408 * address of the server passes, so do backwards 409 * compatibility on 4.3style sockaddrs here. 410 */ 411 if (error = copyin(una.addr, &osa, sizeof osa)) { 412 printf("ultrix_mount: nfs copyin osa\n"); 413 return (error); 414 } 415 sap->sin_family = (u_char)osa.sin_family; 416 sap->sin_len = sizeof(*sap); 417 /* allocate space above caller's stack for nfs_args */ 418 SCARG(&nuap, data) = usp; 419 usp += sizeof (na); 420 /* allocate space above caller's stack for server sockaddr */ 421 na.version = NFS_ARGSVERSION; 422 na.addr = (struct sockaddr *)usp; 423 usp += sizeof(*sap); 424 na.addrlen = sap->sin_len; 425 na.sotype = SOCK_DGRAM; 426 na.proto = IPPROTO_UDP; 427 na.fh = una.fh; 428 na.fhsize = NFSX_V2FH; 429 na.flags = /*una.flags;*/ NFSMNT_NOCONN | NFSMNT_RESVPORT; 430 na.wsize = una.wsize; 431 na.rsize = una.rsize; 432 na.timeo = una.timeo; 433 na.retrans = una.retrans; 434 na.hostname = una.hostname; 435 if (error = copyout(sap, na.addr, sizeof (*sap) )) 436 return (error); 437 if (error = copyout(&na, SCARG(&nuap, data), sizeof na)) 438 return (error); 439 } 440 return (sys_mount(p, &nuap, retval)); 441 } 442
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