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1.1 ! root 1: /* ! 2: * Copyright (c) 1999 Apple Computer, Inc. All rights reserved. ! 3: * ! 4: * @APPLE_LICENSE_HEADER_START@ ! 5: * ! 6: * Portions Copyright (c) 1999 Apple Computer, Inc. All Rights ! 7: * Reserved. This file contains Original Code and/or Modifications of ! 8: * Original Code as defined in and that are subject to the Apple Public ! 9: * Source License Version 1.1 (the "License"). You may not use this file ! 10: * except in compliance with the License. Please obtain a copy of the ! 11: * License at http://www.apple.com/publicsource and read it before using ! 12: * this file. ! 13: * ! 14: * The Original Code and all software distributed under the License are ! 15: * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER ! 16: * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, ! 17: * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, ! 18: * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the ! 19: * License for the specific language governing rights and limitations ! 20: * under the License. ! 21: * ! 22: * @APPLE_LICENSE_HEADER_END@ ! 23: */ ! 24: ! 25: /* $NetBSD: kernfs_vnops.c,v 1.35 1995/02/03 16:18:46 mycroft Exp $ */ ! 26: ! 27: /* ! 28: * Copyright (c) 1992, 1993 ! 29: * The Regents of the University of California. All rights reserved. ! 30: * ! 31: * This code is derived from software donated to Berkeley by ! 32: * Jan-Simon Pendry. ! 33: * ! 34: * Redistribution and use in source and binary forms, with or without ! 35: * modification, are permitted provided that the following conditions ! 36: * are met: ! 37: * 1. Redistributions of source code must retain the above copyright ! 38: * notice, this list of conditions and the following disclaimer. ! 39: * 2. Redistributions in binary form must reproduce the above copyright ! 40: * notice, this list of conditions and the following disclaimer in the ! 41: * documentation and/or other materials provided with the distribution. ! 42: * 3. All advertising materials mentioning features or use of this software ! 43: * must display the following acknowledgement: ! 44: * This product includes software developed by the University of ! 45: * California, Berkeley and its contributors. ! 46: * 4. Neither the name of the University nor the names of its contributors ! 47: * may be used to endorse or promote products derived from this software ! 48: * without specific prior written permission. ! 49: * ! 50: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND ! 51: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE ! 52: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ! 53: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE ! 54: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL ! 55: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS ! 56: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) ! 57: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT ! 58: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY ! 59: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF ! 60: * SUCH DAMAGE. ! 61: * ! 62: * @(#)kernfs_vnops.c 8.9 (Berkeley) 6/15/94 ! 63: */ ! 64: ! 65: /* ! 66: * Kernel parameter filesystem (/kern) ! 67: */ ! 68: ! 69: #include <sys/param.h> ! 70: #include <sys/systm.h> ! 71: #include <sys/kernel.h> ! 72: #include <sys/vmmeter.h> ! 73: #include <sys/types.h> ! 74: #include <sys/time.h> ! 75: #include <sys/proc.h> ! 76: #include <sys/vnode.h> ! 77: #include <sys/malloc.h> ! 78: #include <sys/file.h> ! 79: #include <sys/stat.h> ! 80: #include <sys/mount.h> ! 81: #include <sys/namei.h> ! 82: #include <sys/buf.h> ! 83: #include <sys/dirent.h> ! 84: #include <sys/msgbuf.h> ! 85: #include <miscfs/kernfs/kernfs.h> ! 86: ! 87: #define KSTRING 256 /* Largest I/O available via this filesystem */ ! 88: #define UIO_MX 32 ! 89: ! 90: #define READ_MODE (S_IRUSR|S_IRGRP|S_IROTH) ! 91: #define WRITE_MODE (S_IWUSR|S_IRUSR|S_IRGRP|S_IROTH) ! 92: #define DIR_MODE (S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH) ! 93: ! 94: struct kern_target { ! 95: u_char kt_type; ! 96: u_char kt_namlen; ! 97: char *kt_name; ! 98: void *kt_data; ! 99: #define KTT_NULL 1 ! 100: #define KTT_TIME 5 ! 101: #define KTT_INT 17 ! 102: #define KTT_STRING 31 ! 103: #define KTT_HOSTNAME 47 ! 104: #define KTT_AVENRUN 53 ! 105: #define KTT_DEVICE 71 ! 106: #define KTT_MSGBUF 89 ! 107: u_char kt_tag; ! 108: u_char kt_vtype; ! 109: mode_t kt_mode; ! 110: } kern_targets[] = { ! 111: /* NOTE: The name must be less than UIO_MX-16 chars in length */ ! 112: #define N(s) sizeof(s)-1, s ! 113: /* name data tag type ro/rw */ ! 114: { DT_DIR, N("."), 0, KTT_NULL, VDIR, DIR_MODE }, ! 115: { DT_DIR, N(".."), 0, KTT_NULL, VDIR, DIR_MODE }, ! 116: { DT_REG, N("boottime"), &boottime.tv_sec, KTT_INT, VREG, READ_MODE }, ! 117: { DT_REG, N("copyright"), copyright, KTT_STRING, VREG, READ_MODE }, ! 118: { DT_REG, N("hostname"), 0, KTT_HOSTNAME, VREG, WRITE_MODE }, ! 119: { DT_REG, N("hz"), &hz, KTT_INT, VREG, READ_MODE }, ! 120: { DT_REG, N("loadavg"), 0, KTT_AVENRUN, VREG, READ_MODE }, ! 121: { DT_REG, N("msgbuf"), 0, KTT_MSGBUF, VREG, READ_MODE }, ! 122: { DT_REG, N("pagesize"), &cnt.v_page_size, KTT_INT, VREG, READ_MODE }, ! 123: { DT_REG, N("physmem"), &physmem, KTT_INT, VREG, READ_MODE }, ! 124: #if 0 ! 125: { DT_DIR, N("root"), 0, KTT_NULL, VDIR, DIR_MODE }, ! 126: #endif ! 127: { DT_BLK, N("rootdev"), &rootdev, KTT_DEVICE, VBLK, READ_MODE }, ! 128: { DT_CHR, N("rrootdev"), &rrootdev, KTT_DEVICE, VCHR, READ_MODE }, ! 129: { DT_REG, N("time"), 0, KTT_TIME, VREG, READ_MODE }, ! 130: { DT_REG, N("version"), version, KTT_STRING, VREG, READ_MODE }, ! 131: #undef N ! 132: }; ! 133: static int nkern_targets = sizeof(kern_targets) / sizeof(kern_targets[0]); ! 134: ! 135: int ! 136: kernfs_xread(kt, off, bufp, len) ! 137: struct kern_target *kt; ! 138: int off; ! 139: char **bufp; ! 140: int len; ! 141: { ! 142: ! 143: switch (kt->kt_tag) { ! 144: case KTT_TIME: { ! 145: struct timeval tv; ! 146: ! 147: microtime(&tv); ! 148: sprintf(*bufp, "%d %d\n", tv.tv_sec, tv.tv_usec); ! 149: break; ! 150: } ! 151: ! 152: case KTT_INT: { ! 153: int *ip = kt->kt_data; ! 154: ! 155: sprintf(*bufp, "%d\n", *ip); ! 156: break; ! 157: } ! 158: ! 159: case KTT_STRING: { ! 160: char *cp = kt->kt_data; ! 161: ! 162: *bufp = cp; ! 163: break; ! 164: } ! 165: ! 166: case KTT_MSGBUF: { ! 167: extern struct msgbuf *msgbufp; ! 168: long n; ! 169: ! 170: if (off >= MSG_BSIZE) ! 171: return (0); ! 172: n = msgbufp->msg_bufx + off; ! 173: if (n >= MSG_BSIZE) ! 174: n -= MSG_BSIZE; ! 175: len = min(MSG_BSIZE - n, MSG_BSIZE - off); ! 176: *bufp = msgbufp->msg_bufc + n; ! 177: return (len); ! 178: } ! 179: ! 180: case KTT_HOSTNAME: { ! 181: char *cp = hostname; ! 182: int xlen = hostnamelen; ! 183: ! 184: if (xlen >= (len-2)) ! 185: return (EINVAL); ! 186: ! 187: bcopy(cp, *bufp, xlen); ! 188: (*bufp)[xlen] = '\n'; ! 189: (*bufp)[xlen+1] = '\0'; ! 190: break; ! 191: } ! 192: ! 193: case KTT_AVENRUN: ! 194: averunnable.fscale = FSCALE; ! 195: sprintf(*bufp, "%ld %ld %ld %ld\n", ! 196: averunnable.ldavg[0], averunnable.ldavg[1], ! 197: averunnable.ldavg[2], averunnable.fscale); ! 198: break; ! 199: ! 200: default: ! 201: return (0); ! 202: } ! 203: ! 204: len = strlen(*bufp); ! 205: if (len <= off) ! 206: return (0); ! 207: *bufp += off; ! 208: return (len - off); ! 209: } ! 210: ! 211: int ! 212: kernfs_xwrite(kt, buf, len) ! 213: struct kern_target *kt; ! 214: char *buf; ! 215: int len; ! 216: { ! 217: ! 218: switch (kt->kt_tag) { ! 219: case KTT_HOSTNAME: ! 220: if (buf[len-1] == '\n') ! 221: --len; ! 222: bcopy(buf, hostname, len); ! 223: hostname[len] = '\0'; ! 224: hostnamelen = len; ! 225: return (0); ! 226: ! 227: default: ! 228: return (EIO); ! 229: } ! 230: } ! 231: ! 232: ! 233: /* ! 234: * vp is the current namei directory ! 235: * ndp is the name to locate in that directory... ! 236: */ ! 237: kernfs_lookup(ap) ! 238: struct vop_lookup_args /* { ! 239: struct vnode * a_dvp; ! 240: struct vnode ** a_vpp; ! 241: struct componentname * a_cnp; ! 242: } */ *ap; ! 243: { ! 244: struct componentname *cnp = ap->a_cnp; ! 245: struct vnode **vpp = ap->a_vpp; ! 246: struct vnode *dvp = ap->a_dvp; ! 247: char *pname = cnp->cn_nameptr; ! 248: struct kern_target *kt; ! 249: struct vnode *fvp; ! 250: int error, i; ! 251: ! 252: #ifdef KERNFS_DIAGNOSTIC ! 253: printf("kernfs_lookup(%x)\n", ap); ! 254: printf("kernfs_lookup(dp = %x, vpp = %x, cnp = %x)\n", dvp, vpp, ap->a_cnp); ! 255: printf("kernfs_lookup(%s)\n", pname); ! 256: #endif ! 257: ! 258: *vpp = NULLVP; ! 259: ! 260: if (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME) ! 261: return (EROFS); ! 262: ! 263: if (cnp->cn_namelen == 1 && *pname == '.') { ! 264: *vpp = dvp; ! 265: VREF(dvp); ! 266: /*VOP_LOCK(dvp);*/ ! 267: return (0); ! 268: } ! 269: ! 270: #if 0 ! 271: if (cnp->cn_namelen == 4 && bcmp(pname, "root", 4) == 0) { ! 272: *vpp = rootdir; ! 273: VREF(rootdir); ! 274: VOP_LOCK(rootdir); ! 275: return (0); ! 276: } ! 277: #endif ! 278: ! 279: for (kt = kern_targets, i = 0; i < nkern_targets; kt++, i++) { ! 280: if (cnp->cn_namelen == kt->kt_namlen && ! 281: bcmp(kt->kt_name, pname, cnp->cn_namelen) == 0) ! 282: goto found; ! 283: } ! 284: ! 285: #ifdef KERNFS_DIAGNOSTIC ! 286: printf("kernfs_lookup: i = %d, failed", i); ! 287: #endif ! 288: ! 289: return (cnp->cn_nameiop == LOOKUP ? ENOENT : EROFS); ! 290: ! 291: found: ! 292: if (kt->kt_tag == KTT_DEVICE) { ! 293: dev_t *dp = kt->kt_data; ! 294: loop: ! 295: if (*dp == NODEV || !vfinddev(*dp, kt->kt_vtype, &fvp)) ! 296: return (ENOENT); ! 297: *vpp = fvp; ! 298: if (vget(fvp, 1)) ! 299: goto loop; ! 300: return (0); ! 301: } ! 302: ! 303: #ifdef KERNFS_DIAGNOSTIC ! 304: printf("kernfs_lookup: allocate new vnode\n"); ! 305: #endif ! 306: if (error = getnewvnode(VT_KERNFS, dvp->v_mount, kernfs_vnodeop_p, ! 307: &fvp)) ! 308: return (error); ! 309: ! 310: MALLOC(fvp->v_data, void *, sizeof(struct kernfs_node), M_TEMP, ! 311: M_WAITOK); ! 312: VTOKERN(fvp)->kf_kt = kt; ! 313: fvp->v_type = kt->kt_vtype; ! 314: *vpp = fvp; ! 315: ! 316: #ifdef KERNFS_DIAGNOSTIC ! 317: printf("kernfs_lookup: newvp = %x\n", fvp); ! 318: #endif ! 319: return (0); ! 320: } ! 321: ! 322: kernfs_open(ap) ! 323: struct vop_open_args /* { ! 324: struct vnode *a_vp; ! 325: int a_mode; ! 326: struct ucred *a_cred; ! 327: struct proc *a_p; ! 328: } */ *ap; ! 329: { ! 330: ! 331: /* Only need to check access permissions. */ ! 332: return (0); ! 333: } ! 334: ! 335: int ! 336: kernfs_access(ap) ! 337: struct vop_access_args /* { ! 338: struct vnode *a_vp; ! 339: int a_mode; ! 340: struct ucred *a_cred; ! 341: struct proc *a_p; ! 342: } */ *ap; ! 343: { ! 344: struct vnode *vp = ap->a_vp; ! 345: mode_t fmode = ! 346: (vp->v_flag & VROOT) ? DIR_MODE : VTOKERN(vp)->kf_kt->kt_mode; ! 347: ! 348: return (vaccess(fmode, (uid_t)0, (gid_t)0, ap->a_mode, ap->a_cred)); ! 349: } ! 350: ! 351: kernfs_getattr(ap) ! 352: struct vop_getattr_args /* { ! 353: struct vnode *a_vp; ! 354: struct vattr *a_vap; ! 355: struct ucred *a_cred; ! 356: struct proc *a_p; ! 357: } */ *ap; ! 358: { ! 359: struct vnode *vp = ap->a_vp; ! 360: struct vattr *vap = ap->a_vap; ! 361: int error = 0; ! 362: char strbuf[KSTRING], *buf; ! 363: ! 364: bzero((caddr_t) vap, sizeof(*vap)); ! 365: vattr_null(vap); ! 366: vap->va_uid = 0; ! 367: vap->va_gid = 0; ! 368: vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; ! 369: vap->va_size = 0; ! 370: vap->va_blocksize = DEV_BSIZE; ! 371: microtime(&vap->va_atime); ! 372: vap->va_mtime = vap->va_atime; ! 373: vap->va_ctime = vap->va_ctime; ! 374: vap->va_gen = 0; ! 375: vap->va_flags = 0; ! 376: vap->va_rdev = 0; ! 377: vap->va_bytes = 0; ! 378: ! 379: if (vp->v_flag & VROOT) { ! 380: #ifdef KERNFS_DIAGNOSTIC ! 381: printf("kernfs_getattr: stat rootdir\n"); ! 382: #endif ! 383: vap->va_type = VDIR; ! 384: vap->va_mode = DIR_MODE; ! 385: vap->va_nlink = 2; ! 386: vap->va_fileid = 2; ! 387: vap->va_size = DEV_BSIZE; ! 388: } else { ! 389: struct kern_target *kt = VTOKERN(vp)->kf_kt; ! 390: int nbytes, total; ! 391: #ifdef KERNFS_DIAGNOSTIC ! 392: printf("kernfs_getattr: stat target %s\n", kt->kt_name); ! 393: #endif ! 394: vap->va_type = kt->kt_vtype; ! 395: vap->va_mode = kt->kt_mode; ! 396: vap->va_nlink = 1; ! 397: vap->va_fileid = 1 + (kt - kern_targets) / sizeof(*kt); ! 398: total = 0; ! 399: while (buf = strbuf, ! 400: nbytes = kernfs_xread(kt, total, &buf, sizeof(strbuf))) ! 401: total += nbytes; ! 402: vap->va_size = total; ! 403: } ! 404: ! 405: #ifdef KERNFS_DIAGNOSTIC ! 406: printf("kernfs_getattr: return error %d\n", error); ! 407: #endif ! 408: return (error); ! 409: } ! 410: ! 411: kernfs_setattr(ap) ! 412: struct vop_setattr_args /* { ! 413: struct vnode *a_vp; ! 414: struct vattr *a_vap; ! 415: struct ucred *a_cred; ! 416: struct proc *a_p; ! 417: } */ *ap; ! 418: { ! 419: ! 420: /* ! 421: * Silently ignore attribute changes. ! 422: * This allows for open with truncate to have no ! 423: * effect until some data is written. I want to ! 424: * do it this way because all writes are atomic. ! 425: */ ! 426: return (0); ! 427: } ! 428: ! 429: int ! 430: kernfs_read(ap) ! 431: struct vop_read_args /* { ! 432: struct vnode *a_vp; ! 433: struct uio *a_uio; ! 434: int a_ioflag; ! 435: struct ucred *a_cred; ! 436: } */ *ap; ! 437: { ! 438: struct vnode *vp = ap->a_vp; ! 439: struct uio *uio = ap->a_uio; ! 440: struct kern_target *kt; ! 441: char strbuf[KSTRING], *buf; ! 442: int off, len; ! 443: int error; ! 444: ! 445: if (vp->v_type == VDIR) ! 446: return (EOPNOTSUPP); ! 447: ! 448: kt = VTOKERN(vp)->kf_kt; ! 449: ! 450: #ifdef KERNFS_DIAGNOSTIC ! 451: printf("kern_read %s\n", kt->kt_name); ! 452: #endif ! 453: ! 454: off = uio->uio_offset; ! 455: #if 0 ! 456: while (buf = strbuf, ! 457: #else ! 458: if (buf = strbuf, ! 459: #endif ! 460: len = kernfs_xread(kt, off, &buf, sizeof(strbuf))) { ! 461: if (error = uiomove(buf, len, uio)) ! 462: return (error); ! 463: off += len; ! 464: } ! 465: return (0); ! 466: } ! 467: ! 468: int ! 469: kernfs_write(ap) ! 470: struct vop_write_args /* { ! 471: struct vnode *a_vp; ! 472: struct uio *a_uio; ! 473: int a_ioflag; ! 474: struct ucred *a_cred; ! 475: } */ *ap; ! 476: { ! 477: struct vnode *vp = ap->a_vp; ! 478: struct uio *uio = ap->a_uio; ! 479: struct kern_target *kt; ! 480: int error, xlen; ! 481: char strbuf[KSTRING]; ! 482: ! 483: if (vp->v_type == VDIR) ! 484: return (EOPNOTSUPP); ! 485: ! 486: kt = VTOKERN(vp)->kf_kt; ! 487: ! 488: if (uio->uio_offset != 0) ! 489: return (EINVAL); ! 490: ! 491: xlen = min(uio->uio_resid, KSTRING-1); ! 492: if (error = uiomove(strbuf, xlen, uio)) ! 493: return (error); ! 494: ! 495: if (uio->uio_resid != 0) ! 496: return (EIO); ! 497: ! 498: strbuf[xlen] = '\0'; ! 499: xlen = strlen(strbuf); ! 500: return (kernfs_xwrite(kt, strbuf, xlen)); ! 501: } ! 502: ! 503: kernfs_readdir(ap) ! 504: struct vop_readdir_args /* { ! 505: struct vnode *a_vp; ! 506: struct uio *a_uio; ! 507: struct ucred *a_cred; ! 508: int *a_eofflag; ! 509: u_long *a_cookies; ! 510: int a_ncookies; ! 511: } */ *ap; ! 512: { ! 513: struct uio *uio = ap->a_uio; ! 514: struct kern_target *kt; ! 515: struct dirent d; ! 516: int i; ! 517: int error; ! 518: ! 519: if (ap->a_vp->v_type != VDIR) ! 520: return (ENOTDIR); ! 521: ! 522: /* ! 523: * We don't allow exporting kernfs mounts, and currently local ! 524: * requests do not need cookies. ! 525: */ ! 526: if (ap->a_ncookies != NULL) ! 527: panic("kernfs_readdir: not hungry"); ! 528: ! 529: i = uio->uio_offset / UIO_MX; ! 530: error = 0; ! 531: for (kt = &kern_targets[i]; ! 532: uio->uio_resid >= UIO_MX && i < nkern_targets; kt++, i++) { ! 533: struct dirent *dp = &d; ! 534: #ifdef KERNFS_DIAGNOSTIC ! 535: printf("kernfs_readdir: i = %d\n", i); ! 536: #endif ! 537: ! 538: if (kt->kt_tag == KTT_DEVICE) { ! 539: dev_t *dp = kt->kt_data; ! 540: struct vnode *fvp; ! 541: ! 542: if (*dp == NODEV || !vfinddev(*dp, kt->kt_vtype, &fvp)) ! 543: continue; ! 544: } ! 545: ! 546: bzero((caddr_t)dp, UIO_MX); ! 547: dp->d_namlen = kt->kt_namlen; ! 548: bcopy(kt->kt_name, dp->d_name, kt->kt_namlen+1); ! 549: ! 550: #ifdef KERNFS_DIAGNOSTIC ! 551: printf("kernfs_readdir: name = %s, len = %d\n", ! 552: dp->d_name, dp->d_namlen); ! 553: #endif ! 554: /* ! 555: * Fill in the remaining fields ! 556: */ ! 557: dp->d_reclen = UIO_MX; ! 558: dp->d_fileno = i + 3; ! 559: dp->d_type = kt->kt_type; ! 560: /* ! 561: * And ship to userland ! 562: */ ! 563: if (error = uiomove((caddr_t)dp, UIO_MX, uio)) ! 564: break; ! 565: } ! 566: ! 567: uio->uio_offset = i * UIO_MX; ! 568: ! 569: return (error); ! 570: } ! 571: ! 572: kernfs_inactive(ap) ! 573: struct vop_inactive_args /* { ! 574: struct vnode *a_vp; ! 575: } */ *ap; ! 576: { ! 577: struct vnode *vp = ap->a_vp; ! 578: ! 579: #ifdef KERNFS_DIAGNOSTIC ! 580: printf("kernfs_inactive(%x)\n", vp); ! 581: #endif ! 582: /* ! 583: * Clear out the v_type field to avoid ! 584: * nasty things happening in vgone(). ! 585: */ ! 586: vp->v_type = VNON; ! 587: return (0); ! 588: } ! 589: ! 590: kernfs_reclaim(ap) ! 591: struct vop_reclaim_args /* { ! 592: struct vnode *a_vp; ! 593: } */ *ap; ! 594: { ! 595: struct vnode *vp = ap->a_vp; ! 596: ! 597: #ifdef KERNFS_DIAGNOSTIC ! 598: printf("kernfs_reclaim(%x)\n", vp); ! 599: #endif ! 600: if (vp->v_data) { ! 601: FREE(vp->v_data, M_TEMP); ! 602: vp->v_data = 0; ! 603: } ! 604: return (0); ! 605: } ! 606: ! 607: /* ! 608: * Return POSIX pathconf information applicable to special devices. ! 609: */ ! 610: kernfs_pathconf(ap) ! 611: struct vop_pathconf_args /* { ! 612: struct vnode *a_vp; ! 613: int a_name; ! 614: register_t *a_retval; ! 615: } */ *ap; ! 616: { ! 617: ! 618: switch (ap->a_name) { ! 619: case _PC_LINK_MAX: ! 620: *ap->a_retval = LINK_MAX; ! 621: return (0); ! 622: case _PC_MAX_CANON: ! 623: *ap->a_retval = MAX_CANON; ! 624: return (0); ! 625: case _PC_MAX_INPUT: ! 626: *ap->a_retval = MAX_INPUT; ! 627: return (0); ! 628: case _PC_PIPE_BUF: ! 629: *ap->a_retval = PIPE_BUF; ! 630: return (0); ! 631: case _PC_CHOWN_RESTRICTED: ! 632: *ap->a_retval = 1; ! 633: return (0); ! 634: case _PC_VDISABLE: ! 635: *ap->a_retval = _POSIX_VDISABLE; ! 636: return (0); ! 637: default: ! 638: return (EINVAL); ! 639: } ! 640: /* NOTREACHED */ ! 641: } ! 642: ! 643: /* ! 644: * Print out the contents of a /dev/fd vnode. ! 645: */ ! 646: /* ARGSUSED */ ! 647: kernfs_print(ap) ! 648: struct vop_print_args /* { ! 649: struct vnode *a_vp; ! 650: } */ *ap; ! 651: { ! 652: ! 653: printf("tag VT_KERNFS, kernfs vnode\n"); ! 654: return (0); ! 655: } ! 656: ! 657: /*void*/ ! 658: kernfs_vfree(ap) ! 659: struct vop_vfree_args /* { ! 660: struct vnode *a_pvp; ! 661: ino_t a_ino; ! 662: int a_mode; ! 663: } */ *ap; ! 664: { ! 665: ! 666: return (0); ! 667: } ! 668: ! 669: /* ! 670: * /dev/fd vnode unsupported operation ! 671: */ ! 672: kernfs_enotsupp() ! 673: { ! 674: ! 675: return (EOPNOTSUPP); ! 676: } ! 677: ! 678: /* ! 679: * /dev/fd "should never get here" operation ! 680: */ ! 681: kernfs_badop() ! 682: { ! 683: ! 684: panic("kernfs: bad op"); ! 685: /* NOTREACHED */ ! 686: } ! 687: ! 688: /* ! 689: * kernfs vnode null operation ! 690: */ ! 691: kernfs_nullop() ! 692: { ! 693: ! 694: return (0); ! 695: } ! 696: ! 697: #define kernfs_create ((int (*) __P((struct vop_create_args *)))kernfs_enotsupp) ! 698: #define kernfs_mknod ((int (*) __P((struct vop_mknod_args *)))kernfs_enotsupp) ! 699: #define kernfs_close ((int (*) __P((struct vop_close_args *)))nullop) ! 700: #define kernfs_ioctl ((int (*) __P((struct vop_ioctl_args *)))kernfs_enotsupp) ! 701: #define kernfs_select ((int (*) __P((struct vop_select_args *)))kernfs_enotsupp) ! 702: #define kernfs_mmap ((int (*) __P((struct vop_mmap_args *)))kernfs_enotsupp) ! 703: #define kernfs_fsync ((int (*) __P((struct vop_fsync_args *)))nullop) ! 704: #define kernfs_seek ((int (*) __P((struct vop_seek_args *)))nullop) ! 705: #define kernfs_remove ((int (*) __P((struct vop_remove_args *)))kernfs_enotsupp) ! 706: #define kernfs_link ((int (*) __P((struct vop_link_args *)))kernfs_enotsupp) ! 707: #define kernfs_rename ((int (*) __P((struct vop_rename_args *)))kernfs_enotsupp) ! 708: #define kernfs_mkdir ((int (*) __P((struct vop_mkdir_args *)))kernfs_enotsupp) ! 709: #define kernfs_rmdir ((int (*) __P((struct vop_rmdir_args *)))kernfs_enotsupp) ! 710: #define kernfs_symlink ((int (*) __P((struct vop_symlink_args *)))kernfs_enotsupp) ! 711: #define kernfs_readlink \ ! 712: ((int (*) __P((struct vop_readlink_args *)))kernfs_enotsupp) ! 713: #define kernfs_abortop ((int (*) __P((struct vop_abortop_args *)))nullop) ! 714: #define kernfs_lock ((int (*) __P((struct vop_lock_args *)))nullop) ! 715: #define kernfs_unlock ((int (*) __P((struct vop_unlock_args *)))nullop) ! 716: #define kernfs_bmap ((int (*) __P((struct vop_bmap_args *)))kernfs_badop) ! 717: #define kernfs_strategy ((int (*) __P((struct vop_strategy_args *)))kernfs_badop) ! 718: #define kernfs_islocked ((int (*) __P((struct vop_islocked_args *)))nullop) ! 719: #define kernfs_advlock ((int (*) __P((struct vop_advlock_args *)))kernfs_enotsupp) ! 720: #define kernfs_blkatoff \ ! 721: ((int (*) __P((struct vop_blkatoff_args *)))kernfs_enotsupp) ! 722: #define kernfs_valloc ((int(*) __P(( \ ! 723: struct vnode *pvp, \ ! 724: int mode, \ ! 725: struct ucred *cred, \ ! 726: struct vnode **vpp))) kernfs_enotsupp) ! 727: #define kernfs_truncate \ ! 728: ((int (*) __P((struct vop_truncate_args *)))kernfs_enotsupp) ! 729: #define kernfs_update ((int (*) __P((struct vop_update_args *)))kernfs_enotsupp) ! 730: #define kernfs_bwrite ((int (*) __P((struct vop_bwrite_args *)))kernfs_enotsupp) ! 731: ! 732: int (**kernfs_vnodeop_p)(); ! 733: struct vnodeopv_entry_desc kernfs_vnodeop_entries[] = { ! 734: { &vop_default_desc, vn_default_error }, ! 735: { &vop_lookup_desc, kernfs_lookup }, /* lookup */ ! 736: { &vop_create_desc, kernfs_create }, /* create */ ! 737: { &vop_mknod_desc, kernfs_mknod }, /* mknod */ ! 738: { &vop_open_desc, kernfs_open }, /* open */ ! 739: { &vop_close_desc, kernfs_close }, /* close */ ! 740: { &vop_access_desc, kernfs_access }, /* access */ ! 741: { &vop_getattr_desc, kernfs_getattr }, /* getattr */ ! 742: { &vop_setattr_desc, kernfs_setattr }, /* setattr */ ! 743: { &vop_read_desc, kernfs_read }, /* read */ ! 744: { &vop_write_desc, kernfs_write }, /* write */ ! 745: { &vop_ioctl_desc, kernfs_ioctl }, /* ioctl */ ! 746: { &vop_select_desc, kernfs_select }, /* select */ ! 747: { &vop_mmap_desc, kernfs_mmap }, /* mmap */ ! 748: { &vop_fsync_desc, kernfs_fsync }, /* fsync */ ! 749: { &vop_seek_desc, kernfs_seek }, /* seek */ ! 750: { &vop_remove_desc, kernfs_remove }, /* remove */ ! 751: { &vop_link_desc, kernfs_link }, /* link */ ! 752: { &vop_rename_desc, kernfs_rename }, /* rename */ ! 753: { &vop_mkdir_desc, kernfs_mkdir }, /* mkdir */ ! 754: { &vop_rmdir_desc, kernfs_rmdir }, /* rmdir */ ! 755: { &vop_symlink_desc, kernfs_symlink }, /* symlink */ ! 756: { &vop_readdir_desc, kernfs_readdir }, /* readdir */ ! 757: { &vop_readlink_desc, kernfs_readlink },/* readlink */ ! 758: { &vop_abortop_desc, kernfs_abortop }, /* abortop */ ! 759: { &vop_inactive_desc, kernfs_inactive },/* inactive */ ! 760: { &vop_reclaim_desc, kernfs_reclaim }, /* reclaim */ ! 761: { &vop_lock_desc, kernfs_lock }, /* lock */ ! 762: { &vop_unlock_desc, kernfs_unlock }, /* unlock */ ! 763: { &vop_bmap_desc, kernfs_bmap }, /* bmap */ ! 764: { &vop_strategy_desc, kernfs_strategy },/* strategy */ ! 765: { &vop_print_desc, kernfs_print }, /* print */ ! 766: { &vop_islocked_desc, kernfs_islocked },/* islocked */ ! 767: { &vop_pathconf_desc, kernfs_pathconf },/* pathconf */ ! 768: { &vop_advlock_desc, kernfs_advlock }, /* advlock */ ! 769: { &vop_blkatoff_desc, kernfs_blkatoff },/* blkatoff */ ! 770: { &vop_valloc_desc, kernfs_valloc }, /* valloc */ ! 771: { &vop_vfree_desc, kernfs_vfree }, /* vfree */ ! 772: { &vop_truncate_desc, kernfs_truncate },/* truncate */ ! 773: { &vop_update_desc, kernfs_update }, /* update */ ! 774: { &vop_bwrite_desc, kernfs_bwrite }, /* bwrite */ ! 775: { (struct vnodeop_desc*)NULL, (int(*)())NULL } ! 776: }; ! 777: struct vnodeopv_desc kernfs_vnodeop_opv_desc = ! 778: { &kernfs_vnodeop_p, kernfs_vnodeop_entries };
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