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1.1 root 1: /*
2: * Copyright (c) 1990, 1992 Jan-Simon Pendry
3: * All rights reserved.
4: *
5: * This code is derived from software contributed to Berkeley by
6: * Jan-Simon Pendry.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
16: * 3. All advertising materials mentioning features or use of this software
17: * must display the following acknowledgement:
18: * This product includes software developed by the University of
19: * California, Berkeley and its contributors.
20: * 4. Neither the name of the University nor the names of its contributors
21: * may be used to endorse or promote products derived from this software
22: * without specific prior written permission.
23: *
24: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34: * SUCH DAMAGE.
35: *
1.1.1.2 ! root 36: * kernfs_vnops.c,v 1.10 1993/06/07 05:25:25 cgd Exp
1.1 root 37: */
38:
39: /*
40: * Kernel parameter filesystem
41: */
42:
43: #include "param.h"
44: #include "systm.h"
45: #include "kernel.h"
46: #include "types.h"
47: #include "time.h"
48: #include "proc.h"
49: #include "file.h"
50: #include "vnode.h"
51: #include "stat.h"
52: #include "mount.h"
53: #include "namei.h"
54: #include "buf.h"
55: #include "miscfs/kernfs/kernfs.h"
56:
57: #include "../ufs/dir.h" /* For readdir() XXX */
58:
1.1.1.2 ! root 59: struct kernfs_target kernfs_targets[] = {
1.1 root 60: /* NOTE: The name must be less than UIO_MX-16 chars in length */
1.1.1.2 ! root 61: DIR_TARGET(".", 0, KTT_NULL, KTM_DIR_PERMS )
! 62: DIR_TARGET("..", 0, KTT_NULL, KTM_DIR_PERMS )
! 63: REG_TARGET("copyright", copyright, KTT_STRING, KTM_RO_PERMS )
! 64: REG_TARGET("hostname", 0, KTT_HOSTNAME, KTM_RW_PERMS )
! 65: REG_TARGET("hz", &hz, KTT_INT, KTM_RO_PERMS )
! 66: REG_TARGET("loadavg", 0, KTT_AVENRUN, KTM_RO_PERMS )
! 67: REG_TARGET("physmem", &physmem, KTT_INT, KTM_RO_PERMS )
! 68: DIR_TARGET("root", 0, KTT_NULL, KTM_DIR_PERMS )
! 69: BLK_TARGET("rootdev", 0, KTT_NULL, KTM_RO_PERMS )
! 70: CHR_TARGET("rrootdev", 0, KTT_NULL, KTM_RO_PERMS )
! 71: REG_TARGET("time", 0, KTT_TIME, KTM_RO_PERMS )
! 72: REG_TARGET("version", version, KTT_STRING, KTM_RO_PERMS )
1.1 root 73: };
74:
1.1.1.2 ! root 75: static int nkernfs_targets = sizeof(kernfs_targets) / sizeof(kernfs_targets[0]);
1.1 root 76:
77: static int
78: kernfs_xread(kt, buf, len, lenp)
1.1.1.2 ! root 79: struct kernfs_target *kt;
1.1 root 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:
1.1.1.2 ! root 115: if (xlen + 2 > len) /* extra space for null and newline */
1.1 root 116: return (EINVAL);
117:
1.1.1.2 ! root 118: bcopy(cp, buf, xlen); /* safer than sprintf */
! 119: buf[xlen] = '\n';
! 120: buf[xlen+1] = '\0';
1.1 root 121: break;
122: }
123:
124: case KTT_AVENRUN:
125: sprintf(buf, "%d %d %d %d\n",
126: averunnable[0],
127: averunnable[1],
128: averunnable[2],
129: 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)
1.1.1.2 ! root 142: struct kernfs_target *kt;
1.1 root 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);
1.1.1.2 ! root 151: /* kernfs_write set buf[value_passed_as_len] = \0.
! 152: * therefore, buf len (hostnamelen) = len.
! 153: */
! 154: hostnamelen = len;
! 155: hostname[hostnamelen] = '\0'; /* null end of string. */
1.1 root 156: return (0);
157: }
158:
159: default:
160: return (EIO);
161: }
162: }
163:
164: /*
165: * vp is the current namei directory
166: * ndp is the name to locate in that directory...
167: */
168: kernfs_lookup(dvp, ndp, p)
169: struct vnode *dvp;
170: struct nameidata *ndp;
171: struct proc *p;
172: {
173: char *pname = ndp->ni_ptr;
174: int error = ENOENT;
175: int i;
176: struct vnode *fvp;
177:
178: #ifdef KERNFS_DIAGNOSTIC
179: printf("kernfs_lookup(%s)\n", pname);
180: #endif
181: if (ndp->ni_namelen == 1 && *pname == '.') {
182: ndp->ni_dvp = dvp;
183: ndp->ni_vp = dvp;
184: VREF(dvp);
185: /*VOP_LOCK(dvp);*/
186: return (0);
187: }
188:
189: if (ndp->ni_namelen == 4 && bcmp(pname, "root", 4) == 0) {
190: ndp->ni_dvp = dvp;
191: ndp->ni_vp = rootdir;
192: VREF(rootdir);
193: VOP_LOCK(rootdir);
194: return (0);
195: }
196:
197: /*
198: * /kern/rootdev is the root device
199: */
200: if (ndp->ni_namelen == 7 && bcmp(pname, "rootdev", 7) == 0) {
201: if (vfinddev(rootdev, VBLK, &fvp))
202: return (ENXIO);
203: ndp->ni_dvp = dvp;
204: ndp->ni_vp = fvp;
205: VREF(fvp);
206: VOP_LOCK(fvp);
207: return (0);
208: }
209:
210: /*
211: * /kern/rrootdev is the root device
212: */
213: if (ndp->ni_namelen == 8 && bcmp(pname, "rrootdev", 7) == 0) {
214: ndp->ni_dvp = dvp;
215: ndp->ni_vp = rrootdevvp;
216: VREF(rrootdevvp);
217: VOP_LOCK(rrootdevvp);
218: return (0);
219: }
220:
1.1.1.2 ! root 221: for (i = 0; i < nkernfs_targets; i++) {
! 222: struct kernfs_target *kt = &kernfs_targets[i];
1.1 root 223: if (ndp->ni_namelen == strlen(kt->kt_name) &&
224: bcmp(kt->kt_name, pname, ndp->ni_namelen) == 0) {
225: error = 0;
226: break;
227: }
228: }
229:
230: #ifdef KERNFS_DIAGNOSTIC
231: printf("kernfs_lookup: i = %d, error = %d\n", i, error);
232: #endif
233:
234: if (error)
235: goto bad;
236:
237: #ifdef KERNFS_DIAGNOSTIC
238: printf("kernfs_lookup: allocate new vnode\n");
239: #endif
1.1.1.2 ! root 240: error = getnewvnode(VT_KERNFS, dvp->v_mount, &kernfs_vnodeops, &fvp);
1.1 root 241: if (error)
242: goto bad;
1.1.1.2 ! root 243: VTOKERN(fvp)->kf_kt = &kernfs_targets[i];
1.1 root 244: fvp->v_type = VTOKERN(fvp)->kf_kt->kt_vtype;
245: ndp->ni_dvp = dvp;
246: ndp->ni_vp = fvp;
247: #ifdef KERNFS_DIAGNOSTIC
248: printf("kernfs_lookup: newvp = %x\n", fvp);
249: #endif
250: return (0);
251:
252: bad:;
253: ndp->ni_dvp = dvp;
254: ndp->ni_vp = NULL;
255: #ifdef KERNFS_DIAGNOSTIC
256: printf("kernfs_lookup: error = %d\n", error);
257: #endif
258: return (error);
259: }
260:
261: kernfs_open(vp, mode, cred, p)
262: struct vnode *vp;
263: int mode;
264: struct ucred *cred;
265: struct proc *p;
266: {
1.1.1.2 ! root 267: /* if access succeeded, this always does, too */
1.1 root 268:
1.1.1.2 ! root 269: return (0);
! 270: }
1.1 root 271:
1.1.1.2 ! root 272: /*
! 273: * Check mode permission on target pointer. Mode is READ, WRITE or EXEC.
! 274: * The mode is shifted to select the owner/group/other fields. The
! 275: * super user is granted all permissions.
! 276: */
! 277: kernfs_access(vp, mode, cred, p)
! 278: struct vnode *vp;
! 279: register int mode;
! 280: struct ucred *cred;
! 281: struct proc *p;
! 282: {
! 283: struct kernfs_target *kt = VTOKERN(vp)->kf_kt;
! 284: register gid_t *gp;
! 285: int i, error;
! 286:
! 287: #ifdef KERN_DIAGNOSTIC
! 288: if (!VOP_ISLOCKED(vp)) {
! 289: vprint("kernfs_access: not locked", vp);
! 290: panic("kernfs_access: not locked");
! 291: }
! 292: #endif
1.1 root 293: /*
1.1.1.2 ! root 294: * If you're the super-user, you always get access.
1.1 root 295: */
1.1.1.2 ! root 296: if (cred->cr_uid == 0)
1.1 root 297: return (0);
1.1.1.2 ! root 298: /*
! 299: * Access check is based on only one of owner, group, public.
! 300: * If not owner, then check group. If not a member of the
! 301: * group, then check public access.
! 302: */
! 303: if (cred->cr_uid != /* kt->kt_uid XXX */ 0) {
! 304: mode >>= 3;
! 305: gp = cred->cr_groups;
! 306: for (i = 0; i < cred->cr_ngroups; i++, gp++)
! 307: if (/* kt->kt_gid XXX */ 0 == *gp)
! 308: goto found;
! 309: mode >>= 3;
! 310: found:
! 311: ;
! 312: }
! 313: if ((kt->kt_perms & mode) == mode)
! 314: return (0);
! 315: return (EACCES);
1.1 root 316: }
317:
318: kernfs_getattr(vp, vap, cred, p)
319: struct vnode *vp;
320: struct vattr *vap;
321: struct ucred *cred;
322: struct proc *p;
323: {
324: int error = 0;
325: char strbuf[KSTRING];
1.1.1.2 ! root 326: struct kernfs_target *kt = VTOKERN(vp)->kf_kt;
1.1 root 327:
328: bzero((caddr_t) vap, sizeof(*vap));
329: vattr_null(vap);
1.1.1.2 ! root 330: vap->va_uid = kt->kt_uid;
! 331: vap->va_gid = kt->kt_gid;
1.1 root 332: vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0];
333: /* vap->va_qsize = 0; */
334: vap->va_blocksize = DEV_BSIZE;
335: microtime(&vap->va_atime);
336: vap->va_mtime = vap->va_atime;
337: vap->va_ctime = vap->va_ctime;
338: vap->va_gen = 0;
339: vap->va_flags = 0;
340: vap->va_rdev = 0;
341: /* vap->va_qbytes = 0; */
342: vap->va_bytes = 0;
1.1.1.2 ! root 343: vap->va_type = kt->kt_vtype;
! 344: vap->va_mode = kt->kt_perms;
1.1 root 345:
346: if (vp->v_flag & VROOT) {
347: #ifdef KERNFS_DIAGNOSTIC
348: printf("kernfs_getattr: stat rootdir\n");
349: #endif
350: vap->va_nlink = 2;
351: vap->va_fileid = 2;
352: vap->va_size = DEV_BSIZE;
353: } else {
354: #ifdef KERNFS_DIAGNOSTIC
355: printf("kernfs_getattr: stat target %s\n", kt->kt_name);
356: #endif
357: vap->va_nlink = 1;
1.1.1.2 ! root 358: vap->va_fileid = 3 + (kt - kernfs_targets) / sizeof(*kt);
1.1 root 359: error = kernfs_xread(kt, strbuf, sizeof(strbuf), &vap->va_size);
360: }
361:
362: vp->v_type = vap->va_type;
363: #ifdef KERNFS_DIAGNOSTIC
364: printf("kernfs_getattr: return error %d\n", error);
365: #endif
366: return (error);
367: }
368:
1.1.1.2 ! root 369:
! 370: /*
! 371: * Change the mode on a file.
! 372: */
! 373: kernfs_chmod1(vp, mode, p)
! 374: register struct vnode *vp;
! 375: register int mode;
! 376: struct proc *p;
! 377: {
! 378: register struct ucred *cred = p->p_ucred;
! 379: register struct kernfs_target *kt = VTOKERN(vp)->kf_kt;
! 380: int error;
! 381:
! 382: if ((mode & kt->kt_maxperms) != mode) /* can't set ro var to rw */
! 383: return (EPERM);
! 384:
! 385: if (cred->cr_uid != kt->kt_uid &&
! 386: (error = suser(cred, &p->p_acflag)))
! 387: return (error);
! 388: if (cred->cr_uid) {
! 389: if (vp->v_type != VDIR && (mode & S_ISVTX))
! 390: return (EFTYPE);
! 391: if (!groupmember(kt->kt_gid, cred) && (mode & S_ISGID))
! 392: return (EPERM);
! 393: }
! 394: kt->kt_perms &= ~07777;
! 395: kt->kt_perms |= mode & 07777;
! 396: /* ip->i_flag |= ICHG;*/
! 397: return (0);
! 398: }
! 399:
! 400: /*
! 401: * Perform chown operation on kernfs_target kt
! 402: */
! 403: kernfs_chown1(vp, uid, gid, p)
! 404: register struct vnode *vp;
! 405: uid_t uid;
! 406: gid_t gid;
! 407: struct proc *p;
! 408: {
! 409: register struct kernfs_target *kt = VTOKERN(vp)->kf_kt;
! 410: register struct ucred *cred = p->p_ucred;
! 411: uid_t ouid;
! 412: gid_t ogid;
! 413: int error = 0;
! 414:
! 415: if (uid == (u_short)VNOVAL)
! 416: uid = kt->kt_uid;
! 417: if (gid == (u_short)VNOVAL)
! 418: gid = kt->kt_gid;
! 419: /*
! 420: * If we don't own the file, are trying to change the owner
! 421: * of the file, or are not a member of the target group,
! 422: * the caller must be superuser or the call fails.
! 423: */
! 424: if ((cred->cr_uid != kt->kt_uid || uid != kt->kt_uid ||
! 425: !groupmember((gid_t)gid, cred)) &&
! 426: (error = suser(cred, &p->p_acflag)))
! 427: return (error);
! 428: ouid = kt->kt_uid;
! 429: ogid = kt->kt_gid;
! 430:
! 431: kt->kt_uid = uid;
! 432: kt->kt_gid = gid;
! 433:
! 434: /* if (ouid != uid || ogid != gid)
! 435: ip->i_flag |= ICHG;*/
! 436: if (ouid != uid && cred->cr_uid != 0)
! 437: kt->kt_perms &= ~S_ISUID;
! 438: if (ogid != gid && cred->cr_uid != 0)
! 439: kt->kt_perms &= ~S_ISGID;
! 440: return (0);
! 441: }
! 442:
! 443: /*
! 444: * Set attribute vnode op. called from several syscalls
! 445: */
1.1 root 446: kernfs_setattr(vp, vap, cred, p)
447: struct vnode *vp;
448: struct vattr *vap;
449: struct ucred *cred;
450: struct proc *p;
451: {
1.1.1.2 ! root 452: int error = 0;
1.1 root 453:
454: /*
1.1.1.2 ! root 455: * Check for unsetable attributes.
1.1 root 456: */
1.1.1.2 ! root 457: if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) ||
! 458: (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) ||
! 459: (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) ||
! 460: ((int)vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) {
! 461: return (EINVAL);
! 462: }
! 463: /*
! 464: * Go through the fields and update iff not VNOVAL.
! 465: */
! 466: if (vap->va_uid != (u_short)VNOVAL || vap->va_gid != (u_short)VNOVAL)
! 467: if (error = kernfs_chown1(vp, vap->va_uid, vap->va_gid, p))
! 468: return (error);
! 469: if (vap->va_size != VNOVAL) {
! 470: if (vp->v_type == VDIR)
! 471: return (EISDIR);
! 472: /* else just nod and smile... */
! 473: }
! 474: if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) {
! 475: /* if (cred->cr_uid != ip->i_uid &&
! 476: (error = suser(cred, &p->p_acflag)))
! 477: return (error);
! 478: if (vap->va_atime.tv_sec != VNOVAL)
! 479: ip->i_flag |= IACC;
! 480: if (vap->va_mtime.tv_sec != VNOVAL)
! 481: ip->i_flag |= IUPD;
! 482: ip->i_flag |= ICHG;
! 483: if (error = iupdat(ip, &vap->va_atime, &vap->va_mtime, 1))
! 484: return (error);
! 485: */
! 486: }
! 487: if (vap->va_mode != (u_short)VNOVAL)
! 488: error = kernfs_chmod1(vp, (int)vap->va_mode, p);
! 489: if (vap->va_flags != VNOVAL) {
! 490: /* if (cred->cr_uid != ip->i_uid &&
! 491: (error = suser(cred, &p->p_acflag)))
! 492: return (error);
! 493: if (cred->cr_uid == 0) {
! 494: ip->i_flags = vap->va_flags;
! 495: } else {
! 496: ip->i_flags &= 0xffff0000;
! 497: ip->i_flags |= (vap->va_flags & 0xffff);
! 498: }
! 499: ip->i_flag |= ICHG;
! 500: */
! 501: }
! 502: return (error);
1.1 root 503: }
504:
505: static int
506: kernfs_read(vp, uio, ioflag, cred)
507: struct vnode *vp;
508: struct uio *uio;
509: int ioflag;
510: struct ucred *cred;
511: {
1.1.1.2 ! root 512: struct kernfs_target *kt = VTOKERN(vp)->kf_kt;
1.1 root 513: char strbuf[KSTRING];
514: int off = uio->uio_offset;
515: int len = 0;
516: char *cp = strbuf;
517: int error;
518: #ifdef KERNFS_DIAGNOSTIC
519: printf("kern_read %s\n", kt->kt_name);
520: #endif
521:
522: error = kernfs_xread(kt, strbuf, sizeof(strbuf), &len);
523: if (error)
524: return (error);
525: cp = strbuf + off;
526: len -= off;
527: return (uiomove(cp, len, uio));
528: }
529:
530: static int
531: kernfs_write(vp, uio, ioflag, cred)
532: struct vnode *vp;
533: struct uio *uio;
534: int ioflag;
535: struct ucred *cred;
536: {
1.1.1.2 ! root 537: struct kernfs_target *kt = VTOKERN(vp)->kf_kt;
1.1 root 538: char strbuf[KSTRING];
539: int len = uio->uio_resid;
540: char *cp = strbuf;
541: int xlen;
542: int error;
543:
544: if (uio->uio_offset != 0)
545: return (EINVAL);
546:
547: xlen = min(uio->uio_resid, KSTRING-1);
548: error = uiomove(strbuf, xlen, uio);
549: if (error)
550: return (error);
551:
552: if (uio->uio_resid != 0)
553: return (EIO);
554:
555: strbuf[xlen] = '\0';
556: return (kernfs_xwrite(kt, strbuf, xlen));
557: }
558:
559: kernfs_readdir(vp, uio, cred, eofflagp)
560: struct vnode *vp;
561: struct uio *uio;
562: struct ucred *cred;
563: int *eofflagp;
564: {
565: struct filedesc *fdp;
566: int i;
567: int error;
568:
569: i = uio->uio_offset / UIO_MX;
570: error = 0;
571: while (uio->uio_resid > 0) {
572: #ifdef KERNFS_DIAGNOSTIC
573: printf("kernfs_readdir: i = %d\n", i);
574: #endif
1.1.1.2 ! root 575: if (i >= nkernfs_targets) {
1.1 root 576: *eofflagp = 1;
577: break;
578: }
579: {
580: struct direct d;
581: struct direct *dp = &d;
1.1.1.2 ! root 582: struct kernfs_target *kt = &kernfs_targets[i];
1.1 root 583:
584: bzero((caddr_t) dp, UIO_MX);
585:
586: dp->d_namlen = strlen(kt->kt_name);
587: bcopy(kt->kt_name, dp->d_name, dp->d_namlen+1);
588:
589: #ifdef KERNFS_DIAGNOSTIC
590: printf("kernfs_readdir: name = %s, len = %d\n",
591: dp->d_name, dp->d_namlen);
592: #endif
593: /*
594: * Fill in the remaining fields
595: */
596: dp->d_reclen = UIO_MX;
597: dp->d_ino = i + 3;
598: /*
599: * And ship to userland
600: */
601: error = uiomove((caddr_t) dp, UIO_MX, uio);
602: if (error)
603: break;
604: }
605: i++;
606: }
607:
608: uio->uio_offset = i * UIO_MX;
609:
610: return (error);
611: }
612:
613: kernfs_inactive(vp, p)
614: struct vnode *vp;
615: struct proc *p;
616: {
617: /*
618: * Clear out the v_type field to avoid
619: * nasty things happening in vgone().
620: */
621: vp->v_type = VNON;
622: #ifdef KERNFS_DIAGNOSTIC
623: printf("kernfs_inactive(%x)\n", vp);
624: #endif
625: return (0);
626: }
627:
628: /*
629: * Print out the contents of a kernfs vnode.
630: */
631: /* ARGSUSED */
632: kernfs_print(vp)
633: struct vnode *vp;
634: {
1.1.1.2 ! root 635: printf("tag VT_KERNFS, kernfs vnode\n");
1.1 root 636: }
637:
638: /*
639: * kernfs vnode unsupported operation
640: */
641: kernfs_enotsupp()
642: {
643: return (EOPNOTSUPP);
644: }
645:
646: /*
647: * kernfs "should never get here" operation
648: */
649: kernfs_badop()
650: {
651: panic("kernfs: bad op");
652: /* NOTREACHED */
653: }
654:
655: /*
656: * kernfs vnode null operation
657: */
658: kernfs_nullop()
659: {
660: return (0);
661: }
662:
663: #define kernfs_create ((int (*) __P(( \
664: struct nameidata *ndp, \
665: struct vattr *vap, \
666: struct proc *p))) kernfs_enotsupp)
667: #define kernfs_mknod ((int (*) __P(( \
668: struct nameidata *ndp, \
669: struct vattr *vap, \
670: struct ucred *cred, \
671: struct proc *p))) kernfs_enotsupp)
672: #define kernfs_close ((int (*) __P(( \
673: struct vnode *vp, \
674: int fflag, \
675: struct ucred *cred, \
676: struct proc *p))) nullop)
677: #define kernfs_ioctl ((int (*) __P(( \
678: struct vnode *vp, \
679: int command, \
680: caddr_t data, \
681: int fflag, \
682: struct ucred *cred, \
683: struct proc *p))) kernfs_enotsupp)
684: #define kernfs_select ((int (*) __P(( \
685: struct vnode *vp, \
686: int which, \
687: int fflags, \
688: struct ucred *cred, \
689: struct proc *p))) kernfs_enotsupp)
690: #define kernfs_mmap ((int (*) __P(( \
691: struct vnode *vp, \
692: int fflags, \
693: struct ucred *cred, \
694: struct proc *p))) kernfs_enotsupp)
695: #define kernfs_fsync ((int (*) __P(( \
696: struct vnode *vp, \
697: int fflags, \
698: struct ucred *cred, \
699: int waitfor, \
700: struct proc *p))) nullop)
701: #define kernfs_seek ((int (*) __P(( \
702: struct vnode *vp, \
703: off_t oldoff, \
704: off_t newoff, \
705: struct ucred *cred))) nullop)
706: #define kernfs_remove ((int (*) __P(( \
707: struct nameidata *ndp, \
708: struct proc *p))) kernfs_enotsupp)
709: #define kernfs_link ((int (*) __P(( \
710: struct vnode *vp, \
711: struct nameidata *ndp, \
712: struct proc *p))) kernfs_enotsupp)
713: #define kernfs_rename ((int (*) __P(( \
714: struct nameidata *fndp, \
715: struct nameidata *tdnp, \
716: struct proc *p))) kernfs_enotsupp)
717: #define kernfs_mkdir ((int (*) __P(( \
718: struct nameidata *ndp, \
719: struct vattr *vap, \
720: struct proc *p))) kernfs_enotsupp)
721: #define kernfs_rmdir ((int (*) __P(( \
722: struct nameidata *ndp, \
723: struct proc *p))) kernfs_enotsupp)
724: #define kernfs_symlink ((int (*) __P(( \
725: struct nameidata *ndp, \
726: struct vattr *vap, \
727: char *target, \
728: struct proc *p))) kernfs_enotsupp)
729: #define kernfs_readlink ((int (*) __P(( \
730: struct vnode *vp, \
731: struct uio *uio, \
732: struct ucred *cred))) kernfs_enotsupp)
733: #define kernfs_abortop ((int (*) __P(( \
734: struct nameidata *ndp))) nullop)
735: #ifdef KERNFS_DIAGNOSTIC
736: int kernfs_reclaim(vp)
737: struct vnode *vp;
738: {
739: printf("kernfs_reclaim(%x)\n", vp);
740: return (0);
741: }
742: #else
743: #define kernfs_reclaim ((int (*) __P(( \
744: struct vnode *vp))) nullop)
745: #endif
746: #define kernfs_lock ((int (*) __P(( \
747: struct vnode *vp))) nullop)
748: #define kernfs_unlock ((int (*) __P(( \
749: struct vnode *vp))) nullop)
750: #define kernfs_bmap ((int (*) __P(( \
751: struct vnode *vp, \
752: daddr_t bn, \
753: struct vnode **vpp, \
754: daddr_t *bnp))) kernfs_badop)
755: #define kernfs_strategy ((int (*) __P(( \
756: struct buf *bp))) kernfs_badop)
757: #define kernfs_islocked ((int (*) __P(( \
758: struct vnode *vp))) nullop)
759: #define kernfs_advlock ((int (*) __P(( \
760: struct vnode *vp, \
761: caddr_t id, \
762: int op, \
763: struct flock *fl, \
764: int flags))) kernfs_enotsupp)
765:
766: struct vnodeops kernfs_vnodeops = {
767: kernfs_lookup, /* lookup */
768: kernfs_create, /* create */
769: kernfs_mknod, /* mknod */
770: kernfs_open, /* open */
771: kernfs_close, /* close */
772: kernfs_access, /* access */
773: kernfs_getattr, /* getattr */
774: kernfs_setattr, /* setattr */
775: kernfs_read, /* read */
776: kernfs_write, /* write */
777: kernfs_ioctl, /* ioctl */
778: kernfs_select, /* select */
779: kernfs_mmap, /* mmap */
780: kernfs_fsync, /* fsync */
781: kernfs_seek, /* seek */
782: kernfs_remove, /* remove */
783: kernfs_link, /* link */
784: kernfs_rename, /* rename */
785: kernfs_mkdir, /* mkdir */
786: kernfs_rmdir, /* rmdir */
787: kernfs_symlink, /* symlink */
788: kernfs_readdir, /* readdir */
789: kernfs_readlink, /* readlink */
790: kernfs_abortop, /* abortop */
791: kernfs_inactive, /* inactive */
792: kernfs_reclaim, /* reclaim */
793: kernfs_lock, /* lock */
794: kernfs_unlock, /* unlock */
795: kernfs_bmap, /* bmap */
796: kernfs_strategy, /* strategy */
797: kernfs_print, /* print */
798: kernfs_islocked, /* islocked */
799: kernfs_advlock, /* advlock */
800: };
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