| 1 | /* |
| 2 | * Copyright (c) 1992, 1993 |
| 3 | * The Regents of the University of California. All rights reserved. |
| 4 | * All rights reserved. |
| 5 | * |
| 6 | * This code is derived from software donated to Berkeley by |
| 7 | * Jan-Simon Pendry. |
| 8 | * |
| 9 | * %sccs.include.redist.c% |
| 10 | * |
| 11 | * @(#)kernfs_vnops.c 8.1 (Berkeley) %G% |
| 12 | */ |
| 13 | |
| 14 | /* |
| 15 | * Kernel parameter filesystem (/kern) |
| 16 | */ |
| 17 | |
| 18 | #include <sys/param.h> |
| 19 | #include <sys/systm.h> |
| 20 | #include <sys/kernel.h> |
| 21 | #include <sys/vmmeter.h> |
| 22 | #include <sys/types.h> |
| 23 | #include <sys/time.h> |
| 24 | #include <sys/proc.h> |
| 25 | #include <sys/vnode.h> |
| 26 | #include <sys/malloc.h> |
| 27 | #include <sys/file.h> |
| 28 | #include <sys/stat.h> |
| 29 | #include <sys/mount.h> |
| 30 | #include <sys/namei.h> |
| 31 | #include <sys/buf.h> |
| 32 | #include <sys/dirent.h> |
| 33 | #include <miscfs/kernfs/kernfs.h> |
| 34 | |
| 35 | #define KSTRING 256 /* Largest I/O available via this filesystem */ |
| 36 | #define UIO_MX 32 |
| 37 | |
| 38 | #define READ_MODE (S_IRUSR|S_IRGRP|S_IROTH) |
| 39 | #define WRITE_MODE (S_IWUSR|S_IRUSR|S_IRGRP|S_IROTH) |
| 40 | #define DIR_MODE (S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH) |
| 41 | |
| 42 | struct kern_target { |
| 43 | char *kt_name; |
| 44 | void *kt_data; |
| 45 | #define KTT_NULL 1 |
| 46 | #define KTT_TIME 5 |
| 47 | #define KTT_INT 17 |
| 48 | #define KTT_STRING 31 |
| 49 | #define KTT_HOSTNAME 47 |
| 50 | #define KTT_AVENRUN 53 |
| 51 | int kt_tag; |
| 52 | int kt_rw; |
| 53 | int kt_vtype; |
| 54 | } kern_targets[] = { |
| 55 | /* NOTE: The name must be less than UIO_MX-16 chars in length */ |
| 56 | /* name data tag ro/rw */ |
| 57 | { ".", 0, KTT_NULL, VREAD, VDIR }, |
| 58 | { "..", 0, KTT_NULL, VREAD, VDIR }, |
| 59 | { "boottime", &boottime.tv_sec, KTT_INT, VREAD, VREG }, |
| 60 | { "copyright", copyright, KTT_STRING, VREAD, VREG }, |
| 61 | { "hostname", 0, KTT_HOSTNAME, VREAD|VWRITE, VREG }, |
| 62 | { "hz", &hz, KTT_INT, VREAD, VREG }, |
| 63 | { "loadavg", 0, KTT_AVENRUN, VREAD, VREG }, |
| 64 | { "pagesize", &cnt.v_page_size, KTT_INT, VREAD, VREG }, |
| 65 | { "physmem", &physmem, KTT_INT, VREAD, VREG }, |
| 66 | #if 0 |
| 67 | { "root", 0, KTT_NULL, VREAD, VDIR }, |
| 68 | #endif |
| 69 | { "rootdev", 0, KTT_NULL, VREAD, VBLK }, |
| 70 | { "rrootdev", 0, KTT_NULL, VREAD, VCHR }, |
| 71 | { "time", 0, KTT_TIME, VREAD, VREG }, |
| 72 | { "version", version, KTT_STRING, VREAD, VREG }, |
| 73 | }; |
| 74 | |
| 75 | static int nkern_targets = sizeof(kern_targets) / sizeof(kern_targets[0]); |
| 76 | |
| 77 | static int |
| 78 | kernfs_xread(kt, buf, len, lenp) |
| 79 | struct kern_target *kt; |
| 80 | char *buf; |
| 81 | int len; |
| 82 | int *lenp; |
| 83 | { |
| 84 | int xlen; |
| 85 | |
| 86 | switch (kt->kt_tag) { |
| 87 | case KTT_TIME: { |
| 88 | struct timeval tv; |
| 89 | microtime(&tv); |
| 90 | sprintf(buf, "%d %d\n", tv.tv_sec, tv.tv_usec); |
| 91 | break; |
| 92 | } |
| 93 | |
| 94 | case KTT_INT: { |
| 95 | int *ip = kt->kt_data; |
| 96 | sprintf(buf, "%d\n", *ip); |
| 97 | break; |
| 98 | } |
| 99 | |
| 100 | case KTT_STRING: { |
| 101 | char *cp = kt->kt_data; |
| 102 | int xlen = strlen(cp) + 1; |
| 103 | |
| 104 | if (xlen >= len) |
| 105 | return (EINVAL); |
| 106 | |
| 107 | bcopy(cp, buf, xlen); |
| 108 | break; |
| 109 | } |
| 110 | |
| 111 | case KTT_HOSTNAME: { |
| 112 | char *cp = hostname; |
| 113 | int xlen = hostnamelen; |
| 114 | |
| 115 | if (xlen >= (len-2)) |
| 116 | return (EINVAL); |
| 117 | |
| 118 | bcopy(cp, buf, xlen); |
| 119 | buf[xlen] = '\n'; |
| 120 | buf[xlen+1] = '\0'; |
| 121 | break; |
| 122 | } |
| 123 | |
| 124 | case KTT_AVENRUN: |
| 125 | sprintf(buf, "%ld %ld %ld %ld\n", |
| 126 | averunnable.ldavg[0], |
| 127 | averunnable.ldavg[1], |
| 128 | averunnable.ldavg[2], |
| 129 | averunnable.fscale); |
| 130 | break; |
| 131 | |
| 132 | default: |
| 133 | return (EINVAL); |
| 134 | } |
| 135 | |
| 136 | *lenp = strlen(buf); |
| 137 | return (0); |
| 138 | } |
| 139 | |
| 140 | static int |
| 141 | kernfs_xwrite(kt, buf, len) |
| 142 | struct kern_target *kt; |
| 143 | char *buf; |
| 144 | int len; |
| 145 | { |
| 146 | switch (kt->kt_tag) { |
| 147 | case KTT_HOSTNAME: { |
| 148 | if (buf[len-1] == '\n') |
| 149 | --len; |
| 150 | bcopy(buf, hostname, len); |
| 151 | hostname[len] = '\0'; |
| 152 | hostnamelen = len; |
| 153 | return (0); |
| 154 | } |
| 155 | |
| 156 | default: |
| 157 | return (EIO); |
| 158 | } |
| 159 | } |
| 160 | |
| 161 | |
| 162 | /* |
| 163 | * vp is the current namei directory |
| 164 | * ndp is the name to locate in that directory... |
| 165 | */ |
| 166 | kernfs_lookup(ap) |
| 167 | struct vop_lookup_args /* { |
| 168 | struct vnode * a_dvp; |
| 169 | struct vnode ** a_vpp; |
| 170 | struct componentname * a_cnp; |
| 171 | } */ *ap; |
| 172 | { |
| 173 | struct vnode **vpp = ap->a_vpp; |
| 174 | struct vnode *dvp = ap->a_dvp; |
| 175 | struct componentname *cnp = ap->a_cnp; |
| 176 | char *pname; |
| 177 | struct proc *p; |
| 178 | int error; |
| 179 | struct vnode *fvp; |
| 180 | int i; |
| 181 | |
| 182 | #ifdef KERNFS_DIAGNOSTIC |
| 183 | printf("kernfs_lookup(%x)\n", ap); |
| 184 | printf("kernfs_lookup(dp = %x, vpp = %x, cnp = %x)\n", dvp, vpp, ap->a_cnp); |
| 185 | #endif |
| 186 | pname = cnp->cn_nameptr; |
| 187 | #ifdef KERNFS_DIAGNOSTIC |
| 188 | printf("kernfs_lookup(%s)\n", pname); |
| 189 | #endif |
| 190 | if (cnp->cn_namelen == 1 && *pname == '.') { |
| 191 | *vpp = dvp; |
| 192 | VREF(dvp); |
| 193 | /*VOP_LOCK(dvp);*/ |
| 194 | return (0); |
| 195 | } |
| 196 | |
| 197 | #if 0 |
| 198 | if (cnp->cn_namelen == 4 && bcmp(pname, "root", 4) == 0) { |
| 199 | *vpp = rootdir; |
| 200 | VREF(rootdir); |
| 201 | VOP_LOCK(rootdir); |
| 202 | return (0); |
| 203 | } |
| 204 | #endif |
| 205 | |
| 206 | /* |
| 207 | * /kern/rootdev is the root device |
| 208 | */ |
| 209 | if (cnp->cn_namelen == 7 && bcmp(pname, "rootdev", 7) == 0) { |
| 210 | *vpp = rootvp; |
| 211 | VREF(rootvp); |
| 212 | VOP_LOCK(rootvp); |
| 213 | return (0); |
| 214 | } |
| 215 | |
| 216 | /* |
| 217 | * /kern/rrootdev is the raw root device |
| 218 | */ |
| 219 | if (cnp->cn_namelen == 8 && bcmp(pname, "rrootdev", 8) == 0) { |
| 220 | if (rrootvp) { |
| 221 | *vpp = rrootvp; |
| 222 | VREF(rrootvp); |
| 223 | VOP_LOCK(rrootvp); |
| 224 | return (0); |
| 225 | } |
| 226 | error = ENXIO; |
| 227 | goto bad; |
| 228 | } |
| 229 | |
| 230 | error = ENOENT; |
| 231 | |
| 232 | for (i = 0; i < nkern_targets; i++) { |
| 233 | struct kern_target *kt = &kern_targets[i]; |
| 234 | if (cnp->cn_namelen == strlen(kt->kt_name) && |
| 235 | bcmp(kt->kt_name, pname, cnp->cn_namelen) == 0) { |
| 236 | error = 0; |
| 237 | break; |
| 238 | } |
| 239 | } |
| 240 | |
| 241 | #ifdef KERNFS_DIAGNOSTIC |
| 242 | printf("kernfs_lookup: i = %d, error = %d\n", i, error); |
| 243 | #endif |
| 244 | |
| 245 | if (error) |
| 246 | goto bad; |
| 247 | |
| 248 | #ifdef KERNFS_DIAGNOSTIC |
| 249 | printf("kernfs_lookup: allocate new vnode\n"); |
| 250 | #endif |
| 251 | error = getnewvnode(VT_UFS, dvp->v_mount, kernfs_vnodeop_p, &fvp); |
| 252 | if (error) |
| 253 | goto bad; |
| 254 | MALLOC(fvp->v_data, void *, sizeof(struct kernfs_node), M_TEMP, M_WAITOK); |
| 255 | VTOKERN(fvp)->kf_kt = &kern_targets[i]; |
| 256 | fvp->v_type = VTOKERN(fvp)->kf_kt->kt_vtype; |
| 257 | *vpp = fvp; |
| 258 | #ifdef KERNFS_DIAGNOSTIC |
| 259 | printf("kernfs_lookup: newvp = %x\n", fvp); |
| 260 | #endif |
| 261 | return (0); |
| 262 | |
| 263 | bad:; |
| 264 | *vpp = NULL; |
| 265 | #ifdef KERNFS_DIAGNOSTIC |
| 266 | printf("kernfs_lookup: error = %d\n", error); |
| 267 | #endif |
| 268 | return (error); |
| 269 | } |
| 270 | |
| 271 | kernfs_open(ap) |
| 272 | struct vop_open_args /* { |
| 273 | struct vnode *a_vp; |
| 274 | int a_mode; |
| 275 | struct ucred *a_cred; |
| 276 | struct proc *a_p; |
| 277 | } */ *ap; |
| 278 | { |
| 279 | struct vnode *vp = ap->a_vp; |
| 280 | |
| 281 | /* |
| 282 | * Can always open the root (modulo perms) |
| 283 | */ |
| 284 | if (vp->v_flag & VROOT) |
| 285 | return (0); |
| 286 | |
| 287 | #ifdef KERNFS_DIAGNOSTIC |
| 288 | printf("kernfs_open, mode = %x, file = %s\n", |
| 289 | ap->a_mode, VTOKERN(vp)->kf_kt->kt_name); |
| 290 | #endif |
| 291 | |
| 292 | if ((ap->a_mode & FWRITE) && !(VTOKERN(vp)->kf_kt->kt_rw & VWRITE)) |
| 293 | return (EOPNOTSUPP); |
| 294 | |
| 295 | return (0); |
| 296 | } |
| 297 | |
| 298 | static int |
| 299 | kernfs_access(ap) |
| 300 | struct vop_access_args /* { |
| 301 | struct vnode *a_vp; |
| 302 | int a_mode; |
| 303 | struct ucred *a_cred; |
| 304 | struct proc *a_p; |
| 305 | } */ *ap; |
| 306 | { |
| 307 | struct vnode *vp = ap->a_vp; |
| 308 | struct ucred *cred = ap->a_cred; |
| 309 | mode_t mode = ap->a_mode; |
| 310 | |
| 311 | if (mode & VEXEC) { |
| 312 | if (vp->v_flag & VROOT) |
| 313 | return (0); |
| 314 | return (EACCES); |
| 315 | } |
| 316 | |
| 317 | if (cred->cr_uid == 0) { |
| 318 | if ((vp->v_flag & VROOT) == 0) { |
| 319 | struct kern_target *kt = VTOKERN(vp)->kf_kt; |
| 320 | |
| 321 | if ((mode & VWRITE) && !(kt->kt_rw & VWRITE)) |
| 322 | return (EROFS); |
| 323 | } |
| 324 | return (0); |
| 325 | } |
| 326 | |
| 327 | if (mode & VWRITE) |
| 328 | return (EACCES); |
| 329 | |
| 330 | return (0); |
| 331 | } |
| 332 | |
| 333 | |
| 334 | kernfs_getattr(ap) |
| 335 | struct vop_getattr_args /* { |
| 336 | struct vnode *a_vp; |
| 337 | struct vattr *a_vap; |
| 338 | struct ucred *a_cred; |
| 339 | struct proc *a_p; |
| 340 | } */ *ap; |
| 341 | { |
| 342 | struct vnode *vp = ap->a_vp; |
| 343 | struct vattr *vap = ap->a_vap; |
| 344 | int error = 0; |
| 345 | char strbuf[KSTRING]; |
| 346 | |
| 347 | bzero((caddr_t) vap, sizeof(*vap)); |
| 348 | vattr_null(vap); |
| 349 | vap->va_uid = 0; |
| 350 | vap->va_gid = 0; |
| 351 | vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; |
| 352 | /* vap->va_qsize = 0; */ |
| 353 | vap->va_blocksize = DEV_BSIZE; |
| 354 | microtime(&vap->va_atime); |
| 355 | vap->va_mtime = vap->va_atime; |
| 356 | vap->va_ctime = vap->va_ctime; |
| 357 | vap->va_gen = 0; |
| 358 | vap->va_flags = 0; |
| 359 | vap->va_rdev = 0; |
| 360 | /* vap->va_qbytes = 0; */ |
| 361 | vap->va_bytes = 0; |
| 362 | |
| 363 | if (vp->v_flag & VROOT) { |
| 364 | #ifdef KERNFS_DIAGNOSTIC |
| 365 | printf("kernfs_getattr: stat rootdir\n"); |
| 366 | #endif |
| 367 | vap->va_type = VDIR; |
| 368 | vap->va_mode = DIR_MODE; |
| 369 | vap->va_nlink = 2; |
| 370 | vap->va_fileid = 2; |
| 371 | vap->va_size = DEV_BSIZE; |
| 372 | } else { |
| 373 | struct kern_target *kt = VTOKERN(vp)->kf_kt; |
| 374 | int nbytes; |
| 375 | #ifdef KERNFS_DIAGNOSTIC |
| 376 | printf("kernfs_getattr: stat target %s\n", kt->kt_name); |
| 377 | #endif |
| 378 | vap->va_type = kt->kt_vtype; |
| 379 | vap->va_mode = (kt->kt_rw & VWRITE ? WRITE_MODE : READ_MODE); |
| 380 | vap->va_nlink = 1; |
| 381 | vap->va_fileid = 3 + (kt - kern_targets) / sizeof(*kt); |
| 382 | error = kernfs_xread(kt, strbuf, sizeof(strbuf), &nbytes); |
| 383 | vap->va_size = nbytes; |
| 384 | } |
| 385 | |
| 386 | vp->v_type = vap->va_type; |
| 387 | #ifdef KERNFS_DIAGNOSTIC |
| 388 | printf("kernfs_getattr: return error %d\n", error); |
| 389 | #endif |
| 390 | return (error); |
| 391 | } |
| 392 | |
| 393 | kernfs_setattr(ap) |
| 394 | struct vop_setattr_args /* { |
| 395 | struct vnode *a_vp; |
| 396 | struct vattr *a_vap; |
| 397 | struct ucred *a_cred; |
| 398 | struct proc *a_p; |
| 399 | } */ *ap; |
| 400 | { |
| 401 | |
| 402 | /* |
| 403 | * Silently ignore attribute changes. |
| 404 | * This allows for open with truncate to have no |
| 405 | * effect until some data is written. I want to |
| 406 | * do it this way because all writes are atomic. |
| 407 | */ |
| 408 | return (0); |
| 409 | } |
| 410 | |
| 411 | static int |
| 412 | kernfs_read(ap) |
| 413 | struct vop_read_args /* { |
| 414 | struct vnode *a_vp; |
| 415 | struct uio *a_uio; |
| 416 | int a_ioflag; |
| 417 | struct ucred *a_cred; |
| 418 | } */ *ap; |
| 419 | { |
| 420 | struct vnode *vp = ap->a_vp; |
| 421 | struct uio *uio = ap->a_uio; |
| 422 | struct kern_target *kt; |
| 423 | char strbuf[KSTRING]; |
| 424 | int off = uio->uio_offset; |
| 425 | int len = 0; |
| 426 | char *cp = strbuf; |
| 427 | int error; |
| 428 | |
| 429 | if (vp->v_flag & VROOT) |
| 430 | return (0); |
| 431 | |
| 432 | kt = VTOKERN(vp)->kf_kt; |
| 433 | |
| 434 | #ifdef KERNFS_DIAGNOSTIC |
| 435 | printf("kern_read %s\n", kt->kt_name); |
| 436 | #endif |
| 437 | |
| 438 | error = kernfs_xread(kt, strbuf, sizeof(strbuf), &len); |
| 439 | if (error) |
| 440 | return (error); |
| 441 | cp = strbuf + off; |
| 442 | len -= off; |
| 443 | return (uiomove(cp, len, uio)); |
| 444 | } |
| 445 | |
| 446 | static int |
| 447 | kernfs_write(ap) |
| 448 | struct vop_write_args /* { |
| 449 | struct vnode *a_vp; |
| 450 | struct uio *a_uio; |
| 451 | int a_ioflag; |
| 452 | struct ucred *a_cred; |
| 453 | } */ *ap; |
| 454 | { |
| 455 | struct vnode *vp = ap->a_vp; |
| 456 | struct uio *uio = ap->a_uio; |
| 457 | struct kern_target *kt; |
| 458 | char strbuf[KSTRING]; |
| 459 | int len = uio->uio_resid; |
| 460 | char *cp = strbuf; |
| 461 | int xlen; |
| 462 | int error; |
| 463 | |
| 464 | if (vp->v_flag & VROOT) |
| 465 | return (0); |
| 466 | |
| 467 | kt = VTOKERN(vp)->kf_kt; |
| 468 | |
| 469 | if (uio->uio_offset != 0) |
| 470 | return (EINVAL); |
| 471 | |
| 472 | xlen = min(uio->uio_resid, KSTRING-1); |
| 473 | error = uiomove(strbuf, xlen, uio); |
| 474 | if (error) |
| 475 | return (error); |
| 476 | |
| 477 | if (uio->uio_resid != 0) |
| 478 | return (EIO); |
| 479 | |
| 480 | strbuf[xlen] = '\0'; |
| 481 | xlen = strlen(strbuf); |
| 482 | return (kernfs_xwrite(kt, strbuf, xlen)); |
| 483 | } |
| 484 | |
| 485 | |
| 486 | kernfs_readdir(ap) |
| 487 | struct vop_readdir_args /* { |
| 488 | struct vnode *a_vp; |
| 489 | struct uio *a_uio; |
| 490 | struct ucred *a_cred; |
| 491 | } */ *ap; |
| 492 | { |
| 493 | struct uio *uio = ap->a_uio; |
| 494 | int i; |
| 495 | int error; |
| 496 | |
| 497 | i = uio->uio_offset / UIO_MX; |
| 498 | error = 0; |
| 499 | while (uio->uio_resid > 0 && i < nkern_targets) { |
| 500 | struct dirent d; |
| 501 | struct dirent *dp = &d; |
| 502 | struct kern_target *kt = &kern_targets[i]; |
| 503 | #ifdef KERNFS_DIAGNOSTIC |
| 504 | printf("kernfs_readdir: i = %d\n", i); |
| 505 | #endif |
| 506 | |
| 507 | bzero((caddr_t) dp, UIO_MX); |
| 508 | |
| 509 | dp->d_namlen = strlen(kt->kt_name); |
| 510 | bcopy(kt->kt_name, dp->d_name, dp->d_namlen+1); |
| 511 | |
| 512 | #ifdef KERNFS_DIAGNOSTIC |
| 513 | printf("kernfs_readdir: name = %s, len = %d\n", |
| 514 | dp->d_name, dp->d_namlen); |
| 515 | #endif |
| 516 | /* |
| 517 | * Fill in the remaining fields |
| 518 | */ |
| 519 | dp->d_reclen = UIO_MX; |
| 520 | dp->d_fileno = i + 3; |
| 521 | dp->d_type = DT_UNKNOWN; /* XXX */ |
| 522 | /* |
| 523 | * And ship to userland |
| 524 | */ |
| 525 | error = uiomove((caddr_t) dp, UIO_MX, uio); |
| 526 | if (error) |
| 527 | break; |
| 528 | i++; |
| 529 | } |
| 530 | |
| 531 | uio->uio_offset = i * UIO_MX; |
| 532 | |
| 533 | return (error); |
| 534 | } |
| 535 | |
| 536 | kernfs_inactive(ap) |
| 537 | struct vop_inactive_args /* { |
| 538 | struct vnode *a_vp; |
| 539 | } */ *ap; |
| 540 | { |
| 541 | struct vnode *vp = ap->a_vp; |
| 542 | |
| 543 | /* |
| 544 | * Clear out the v_type field to avoid |
| 545 | * nasty things happening in vgone(). |
| 546 | */ |
| 547 | vp->v_type = VNON; |
| 548 | #ifdef KERNFS_DIAGNOSTIC |
| 549 | printf("kernfs_inactive(%x)\n", vp); |
| 550 | #endif |
| 551 | return (0); |
| 552 | } |
| 553 | |
| 554 | kernfs_reclaim(ap) |
| 555 | struct vop_reclaim_args /* { |
| 556 | struct vnode *a_vp; |
| 557 | } */ *ap; |
| 558 | { |
| 559 | struct vnode *vp = ap->a_vp; |
| 560 | #ifdef KERNFS_DIAGNOSTIC |
| 561 | printf("kernfs_reclaim(%x)\n", vp); |
| 562 | #endif |
| 563 | if (vp->v_data) { |
| 564 | FREE(vp->v_data, M_TEMP); |
| 565 | vp->v_data = 0; |
| 566 | } |
| 567 | return (0); |
| 568 | } |
| 569 | |
| 570 | /* |
| 571 | * Print out the contents of a /dev/fd vnode. |
| 572 | */ |
| 573 | /* ARGSUSED */ |
| 574 | kernfs_print(ap) |
| 575 | struct vop_print_args /* { |
| 576 | struct vnode *a_vp; |
| 577 | } */ *ap; |
| 578 | { |
| 579 | |
| 580 | printf("tag VT_NON, kernfs vnode\n"); |
| 581 | return (0); |
| 582 | } |
| 583 | |
| 584 | /*void*/ |
| 585 | kernfs_vfree(ap) |
| 586 | struct vop_vfree_args /* { |
| 587 | struct vnode *a_pvp; |
| 588 | ino_t a_ino; |
| 589 | int a_mode; |
| 590 | } */ *ap; |
| 591 | { |
| 592 | |
| 593 | return (0); |
| 594 | } |
| 595 | |
| 596 | /* |
| 597 | * /dev/fd vnode unsupported operation |
| 598 | */ |
| 599 | kernfs_enotsupp() |
| 600 | { |
| 601 | |
| 602 | return (EOPNOTSUPP); |
| 603 | } |
| 604 | |
| 605 | /* |
| 606 | * /dev/fd "should never get here" operation |
| 607 | */ |
| 608 | kernfs_badop() |
| 609 | { |
| 610 | |
| 611 | panic("kernfs: bad op"); |
| 612 | /* NOTREACHED */ |
| 613 | } |
| 614 | |
| 615 | /* |
| 616 | * kernfs vnode null operation |
| 617 | */ |
| 618 | kernfs_nullop() |
| 619 | { |
| 620 | |
| 621 | return (0); |
| 622 | } |
| 623 | |
| 624 | #define kernfs_create ((int (*) __P((struct vop_create_args *)))kernfs_enotsupp) |
| 625 | #define kernfs_mknod ((int (*) __P((struct vop_mknod_args *)))kernfs_enotsupp) |
| 626 | #define kernfs_close ((int (*) __P((struct vop_close_args *)))nullop) |
| 627 | #define kernfs_ioctl ((int (*) __P((struct vop_ioctl_args *)))kernfs_enotsupp) |
| 628 | #define kernfs_select ((int (*) __P((struct vop_select_args *)))kernfs_enotsupp) |
| 629 | #define kernfs_mmap ((int (*) __P((struct vop_mmap_args *)))kernfs_enotsupp) |
| 630 | #define kernfs_fsync ((int (*) __P((struct vop_fsync_args *)))nullop) |
| 631 | #define kernfs_seek ((int (*) __P((struct vop_seek_args *)))nullop) |
| 632 | #define kernfs_remove ((int (*) __P((struct vop_remove_args *)))kernfs_enotsupp) |
| 633 | #define kernfs_link ((int (*) __P((struct vop_link_args *)))kernfs_enotsupp) |
| 634 | #define kernfs_rename ((int (*) __P((struct vop_rename_args *)))kernfs_enotsupp) |
| 635 | #define kernfs_mkdir ((int (*) __P((struct vop_mkdir_args *)))kernfs_enotsupp) |
| 636 | #define kernfs_rmdir ((int (*) __P((struct vop_rmdir_args *)))kernfs_enotsupp) |
| 637 | #define kernfs_symlink ((int (*) __P((struct vop_symlink_args *)))kernfs_enotsupp) |
| 638 | #define kernfs_readlink \ |
| 639 | ((int (*) __P((struct vop_readlink_args *)))kernfs_enotsupp) |
| 640 | #define kernfs_abortop ((int (*) __P((struct vop_abortop_args *)))nullop) |
| 641 | #define kernfs_lock ((int (*) __P((struct vop_lock_args *)))nullop) |
| 642 | #define kernfs_unlock ((int (*) __P((struct vop_unlock_args *)))nullop) |
| 643 | #define kernfs_bmap ((int (*) __P((struct vop_bmap_args *)))kernfs_badop) |
| 644 | #define kernfs_strategy ((int (*) __P((struct vop_strategy_args *)))kernfs_badop) |
| 645 | #define kernfs_islocked ((int (*) __P((struct vop_islocked_args *)))nullop) |
| 646 | #define kernfs_advlock ((int (*) __P((struct vop_advlock_args *)))kernfs_enotsupp) |
| 647 | #define kernfs_blkatoff \ |
| 648 | ((int (*) __P((struct vop_blkatoff_args *)))kernfs_enotsupp) |
| 649 | #define kernfs_valloc ((int(*) __P(( \ |
| 650 | struct vnode *pvp, \ |
| 651 | int mode, \ |
| 652 | struct ucred *cred, \ |
| 653 | struct vnode **vpp))) kernfs_enotsupp) |
| 654 | #define kernfs_truncate \ |
| 655 | ((int (*) __P((struct vop_truncate_args *)))kernfs_enotsupp) |
| 656 | #define kernfs_update ((int (*) __P((struct vop_update_args *)))kernfs_enotsupp) |
| 657 | #define kernfs_bwrite ((int (*) __P((struct vop_bwrite_args *)))kernfs_enotsupp) |
| 658 | |
| 659 | int (**kernfs_vnodeop_p)(); |
| 660 | struct vnodeopv_entry_desc kernfs_vnodeop_entries[] = { |
| 661 | { &vop_default_desc, vn_default_error }, |
| 662 | { &vop_lookup_desc, kernfs_lookup }, /* lookup */ |
| 663 | { &vop_create_desc, kernfs_create }, /* create */ |
| 664 | { &vop_mknod_desc, kernfs_mknod }, /* mknod */ |
| 665 | { &vop_open_desc, kernfs_open }, /* open */ |
| 666 | { &vop_close_desc, kernfs_close }, /* close */ |
| 667 | { &vop_access_desc, kernfs_access }, /* access */ |
| 668 | { &vop_getattr_desc, kernfs_getattr }, /* getattr */ |
| 669 | { &vop_setattr_desc, kernfs_setattr }, /* setattr */ |
| 670 | { &vop_read_desc, kernfs_read }, /* read */ |
| 671 | { &vop_write_desc, kernfs_write }, /* write */ |
| 672 | { &vop_ioctl_desc, kernfs_ioctl }, /* ioctl */ |
| 673 | { &vop_select_desc, kernfs_select }, /* select */ |
| 674 | { &vop_mmap_desc, kernfs_mmap }, /* mmap */ |
| 675 | { &vop_fsync_desc, kernfs_fsync }, /* fsync */ |
| 676 | { &vop_seek_desc, kernfs_seek }, /* seek */ |
| 677 | { &vop_remove_desc, kernfs_remove }, /* remove */ |
| 678 | { &vop_link_desc, kernfs_link }, /* link */ |
| 679 | { &vop_rename_desc, kernfs_rename }, /* rename */ |
| 680 | { &vop_mkdir_desc, kernfs_mkdir }, /* mkdir */ |
| 681 | { &vop_rmdir_desc, kernfs_rmdir }, /* rmdir */ |
| 682 | { &vop_symlink_desc, kernfs_symlink }, /* symlink */ |
| 683 | { &vop_readdir_desc, kernfs_readdir }, /* readdir */ |
| 684 | { &vop_readlink_desc, kernfs_readlink }, /* readlink */ |
| 685 | { &vop_abortop_desc, kernfs_abortop }, /* abortop */ |
| 686 | { &vop_inactive_desc, kernfs_inactive }, /* inactive */ |
| 687 | { &vop_reclaim_desc, kernfs_reclaim }, /* reclaim */ |
| 688 | { &vop_lock_desc, kernfs_lock }, /* lock */ |
| 689 | { &vop_unlock_desc, kernfs_unlock }, /* unlock */ |
| 690 | { &vop_bmap_desc, kernfs_bmap }, /* bmap */ |
| 691 | { &vop_strategy_desc, kernfs_strategy }, /* strategy */ |
| 692 | { &vop_print_desc, kernfs_print }, /* print */ |
| 693 | { &vop_islocked_desc, kernfs_islocked }, /* islocked */ |
| 694 | { &vop_advlock_desc, kernfs_advlock }, /* advlock */ |
| 695 | { &vop_blkatoff_desc, kernfs_blkatoff }, /* blkatoff */ |
| 696 | { &vop_valloc_desc, kernfs_valloc }, /* valloc */ |
| 697 | { &vop_vfree_desc, kernfs_vfree }, /* vfree */ |
| 698 | { &vop_truncate_desc, kernfs_truncate }, /* truncate */ |
| 699 | { &vop_update_desc, kernfs_update }, /* update */ |
| 700 | { &vop_bwrite_desc, kernfs_bwrite }, /* bwrite */ |
| 701 | { (struct vnodeop_desc*)NULL, (int(*)())NULL } |
| 702 | }; |
| 703 | struct vnodeopv_desc kernfs_vnodeop_opv_desc = |
| 704 | { &kernfs_vnodeop_p, kernfs_vnodeop_entries }; |