Commit | Line | Data |
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341568e0 | 1 | /* |
99315dca KB |
2 | * Copyright (c) 1992, 1993 |
3 | * The Regents of the University of California. All rights reserved. | |
341568e0 JSP |
4 | * |
5 | * This code is derived from software donated to Berkeley by | |
6 | * Jan-Simon Pendry. | |
7 | * | |
8 | * %sccs.include.redist.c% | |
9 | * | |
728dcff6 | 10 | * @(#)kernfs_vnops.c 8.11 (Berkeley) %G% |
341568e0 JSP |
11 | */ |
12 | ||
13 | /* | |
14 | * Kernel parameter filesystem (/kern) | |
15 | */ | |
16 | ||
17 | #include <sys/param.h> | |
18 | #include <sys/systm.h> | |
19 | #include <sys/kernel.h> | |
20 | #include <sys/vmmeter.h> | |
21 | #include <sys/types.h> | |
22 | #include <sys/time.h> | |
23 | #include <sys/proc.h> | |
24 | #include <sys/vnode.h> | |
25 | #include <sys/malloc.h> | |
26 | #include <sys/file.h> | |
27 | #include <sys/stat.h> | |
28 | #include <sys/mount.h> | |
29 | #include <sys/namei.h> | |
30 | #include <sys/buf.h> | |
31 | #include <sys/dirent.h> | |
32 | #include <miscfs/kernfs/kernfs.h> | |
33 | ||
34 | #define KSTRING 256 /* Largest I/O available via this filesystem */ | |
35 | #define UIO_MX 32 | |
36 | ||
a1e23f7a JSP |
37 | #define READ_MODE (S_IRUSR|S_IRGRP|S_IROTH) |
38 | #define WRITE_MODE (S_IWUSR|S_IRUSR|S_IRGRP|S_IROTH) | |
39 | #define DIR_MODE (S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH) | |
40 | ||
341568e0 | 41 | struct kern_target { |
c3f7dc68 JSP |
42 | u_char kt_type; |
43 | u_char kt_namlen; | |
341568e0 JSP |
44 | char *kt_name; |
45 | void *kt_data; | |
c3f7dc68 JSP |
46 | #define KTT_NULL 1 |
47 | #define KTT_TIME 5 | |
48 | #define KTT_INT 17 | |
49 | #define KTT_STRING 31 | |
50 | #define KTT_HOSTNAME 47 | |
51 | #define KTT_AVENRUN 53 | |
52 | #define KTT_DEVICE 71 | |
53 | u_char kt_tag; | |
54 | u_char kt_vtype; | |
55 | mode_t kt_mode; | |
341568e0 JSP |
56 | } kern_targets[] = { |
57 | /* NOTE: The name must be less than UIO_MX-16 chars in length */ | |
c3f7dc68 JSP |
58 | #define N(s) sizeof(s)-1, s |
59 | /* name data tag type ro/rw */ | |
60 | { DT_DIR, N("."), 0, KTT_NULL, VDIR, DIR_MODE }, | |
61 | { DT_DIR, N(".."), 0, KTT_NULL, VDIR, DIR_MODE }, | |
62 | { DT_REG, N("boottime"), &boottime.tv_sec, KTT_INT, VREG, READ_MODE }, | |
63 | { DT_REG, N("copyright"), copyright, KTT_STRING, VREG, READ_MODE }, | |
64 | { DT_REG, N("hostname"), 0, KTT_HOSTNAME, VREG, WRITE_MODE }, | |
65 | { DT_REG, N("hz"), &hz, KTT_INT, VREG, READ_MODE }, | |
66 | { DT_REG, N("loadavg"), 0, KTT_AVENRUN, VREG, READ_MODE }, | |
67 | { DT_REG, N("pagesize"), &cnt.v_page_size, KTT_INT, VREG, READ_MODE }, | |
68 | { DT_REG, N("physmem"), &physmem, KTT_INT, VREG, READ_MODE }, | |
650e78ba | 69 | #if 0 |
c3f7dc68 | 70 | { DT_DIR, N("root"), 0, KTT_NULL, VDIR, DIR_MODE }, |
650e78ba | 71 | #endif |
c3f7dc68 JSP |
72 | { DT_BLK, N("rootdev"), &rootdev, KTT_DEVICE, VBLK, READ_MODE }, |
73 | { DT_CHR, N("rrootdev"), &rrootdev, KTT_DEVICE, VCHR, READ_MODE }, | |
74 | { DT_REG, N("time"), 0, KTT_TIME, VREG, READ_MODE }, | |
75 | { DT_REG, N("version"), version, KTT_STRING, VREG, READ_MODE }, | |
76 | #undef N | |
341568e0 | 77 | }; |
341568e0 JSP |
78 | static int nkern_targets = sizeof(kern_targets) / sizeof(kern_targets[0]); |
79 | ||
80 | static int | |
81 | kernfs_xread(kt, buf, len, lenp) | |
82 | struct kern_target *kt; | |
83 | char *buf; | |
84 | int len; | |
85 | int *lenp; | |
86 | { | |
c3f7dc68 | 87 | |
341568e0 JSP |
88 | switch (kt->kt_tag) { |
89 | case KTT_TIME: { | |
90 | struct timeval tv; | |
91 | microtime(&tv); | |
92 | sprintf(buf, "%d %d\n", tv.tv_sec, tv.tv_usec); | |
93 | break; | |
94 | } | |
95 | ||
96 | case KTT_INT: { | |
97 | int *ip = kt->kt_data; | |
98 | sprintf(buf, "%d\n", *ip); | |
99 | break; | |
100 | } | |
101 | ||
102 | case KTT_STRING: { | |
103 | char *cp = kt->kt_data; | |
104 | int xlen = strlen(cp) + 1; | |
105 | ||
106 | if (xlen >= len) | |
107 | return (EINVAL); | |
108 | ||
109 | bcopy(cp, buf, xlen); | |
110 | break; | |
111 | } | |
112 | ||
113 | case KTT_HOSTNAME: { | |
114 | char *cp = hostname; | |
115 | int xlen = hostnamelen; | |
116 | ||
650e78ba | 117 | if (xlen >= (len-2)) |
341568e0 JSP |
118 | return (EINVAL); |
119 | ||
650e78ba JSP |
120 | bcopy(cp, buf, xlen); |
121 | buf[xlen] = '\n'; | |
122 | buf[xlen+1] = '\0'; | |
341568e0 JSP |
123 | break; |
124 | } | |
125 | ||
126 | case KTT_AVENRUN: | |
127 | sprintf(buf, "%ld %ld %ld %ld\n", | |
c3f7dc68 JSP |
128 | averunnable.ldavg[0], averunnable.ldavg[1], |
129 | averunnable.ldavg[2], averunnable.fscale); | |
341568e0 JSP |
130 | break; |
131 | ||
132 | default: | |
c3f7dc68 | 133 | return (EIO); |
341568e0 JSP |
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 | { | |
c3f7dc68 | 146 | |
341568e0 | 147 | switch (kt->kt_tag) { |
c3f7dc68 | 148 | case KTT_HOSTNAME: |
341568e0 JSP |
149 | if (buf[len-1] == '\n') |
150 | --len; | |
151 | bcopy(buf, hostname, len); | |
650e78ba JSP |
152 | hostname[len] = '\0'; |
153 | hostnamelen = len; | |
341568e0 | 154 | return (0); |
341568e0 JSP |
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 | { | |
c3f7dc68 | 173 | struct componentname *cnp = ap->a_cnp; |
341568e0 JSP |
174 | struct vnode **vpp = ap->a_vpp; |
175 | struct vnode *dvp = ap->a_dvp; | |
c3f7dc68 JSP |
176 | char *pname = cnp->cn_nameptr; |
177 | struct kern_target *kt; | |
341568e0 | 178 | struct vnode *fvp; |
1f3d196a | 179 | int error, i; |
341568e0 JSP |
180 | |
181 | #ifdef KERNFS_DIAGNOSTIC | |
182 | printf("kernfs_lookup(%x)\n", ap); | |
183 | printf("kernfs_lookup(dp = %x, vpp = %x, cnp = %x)\n", dvp, vpp, ap->a_cnp); | |
341568e0 JSP |
184 | printf("kernfs_lookup(%s)\n", pname); |
185 | #endif | |
c3f7dc68 | 186 | |
341568e0 JSP |
187 | if (cnp->cn_namelen == 1 && *pname == '.') { |
188 | *vpp = dvp; | |
fea856fc | 189 | VREF(dvp); |
341568e0 JSP |
190 | /*VOP_LOCK(dvp);*/ |
191 | return (0); | |
192 | } | |
193 | ||
650e78ba | 194 | #if 0 |
341568e0 JSP |
195 | if (cnp->cn_namelen == 4 && bcmp(pname, "root", 4) == 0) { |
196 | *vpp = rootdir; | |
197 | VREF(rootdir); | |
198 | VOP_LOCK(rootdir); | |
199 | return (0); | |
200 | } | |
650e78ba | 201 | #endif |
fea856fc | 202 | |
e053a1ac JSP |
203 | *vpp = NULLVP; |
204 | ||
c3f7dc68 JSP |
205 | for (error = ENOENT, kt = kern_targets, i = 0; i < nkern_targets; |
206 | kt++, i++) { | |
207 | if (cnp->cn_namelen == kt->kt_namlen && | |
341568e0 JSP |
208 | bcmp(kt->kt_name, pname, cnp->cn_namelen) == 0) { |
209 | error = 0; | |
210 | break; | |
211 | } | |
212 | } | |
213 | ||
214 | #ifdef KERNFS_DIAGNOSTIC | |
215 | printf("kernfs_lookup: i = %d, error = %d\n", i, error); | |
216 | #endif | |
217 | ||
218 | if (error) | |
c3f7dc68 JSP |
219 | return (error); |
220 | ||
221 | if (kt->kt_tag == KTT_DEVICE) { | |
222 | dev_t *dp = kt->kt_data; | |
223 | loop: | |
224 | if (*dp == NODEV || !vfinddev(*dp, kt->kt_vtype, &fvp)) | |
225 | return (ENOENT); | |
226 | *vpp = fvp; | |
227 | if (vget(fvp, 1)) | |
228 | goto loop; | |
229 | return (0); | |
230 | } | |
341568e0 JSP |
231 | |
232 | #ifdef KERNFS_DIAGNOSTIC | |
233 | printf("kernfs_lookup: allocate new vnode\n"); | |
234 | #endif | |
c3f7dc68 JSP |
235 | if (error = getnewvnode(VT_KERNFS, dvp->v_mount, kernfs_vnodeop_p, |
236 | &fvp)) | |
237 | return (error); | |
238 | ||
239 | MALLOC(fvp->v_data, void *, sizeof(struct kernfs_node), M_TEMP, | |
240 | M_WAITOK); | |
241 | VTOKERN(fvp)->kf_kt = kt; | |
242 | fvp->v_type = kt->kt_vtype; | |
341568e0 | 243 | *vpp = fvp; |
c3f7dc68 | 244 | |
341568e0 JSP |
245 | #ifdef KERNFS_DIAGNOSTIC |
246 | printf("kernfs_lookup: newvp = %x\n", fvp); | |
247 | #endif | |
248 | return (0); | |
341568e0 JSP |
249 | } |
250 | ||
251 | kernfs_open(ap) | |
252 | struct vop_open_args /* { | |
253 | struct vnode *a_vp; | |
254 | int a_mode; | |
255 | struct ucred *a_cred; | |
256 | struct proc *a_p; | |
257 | } */ *ap; | |
258 | { | |
341568e0 | 259 | |
c3f7dc68 | 260 | /* Only need to check access permissions. */ |
341568e0 JSP |
261 | return (0); |
262 | } | |
263 | ||
264 | static int | |
265 | kernfs_access(ap) | |
266 | struct vop_access_args /* { | |
267 | struct vnode *a_vp; | |
268 | int a_mode; | |
269 | struct ucred *a_cred; | |
270 | struct proc *a_p; | |
271 | } */ *ap; | |
272 | { | |
c3f7dc68 JSP |
273 | register struct vnode *vp = ap->a_vp; |
274 | register struct ucred *cred = ap->a_cred; | |
275 | mode_t amode = ap->a_mode; | |
276 | mode_t fmode = | |
277 | (vp->v_flag & VROOT) ? DIR_MODE : VTOKERN(vp)->kf_kt->kt_mode; | |
278 | mode_t mask = 0; | |
279 | register gid_t *gp; | |
280 | int i; | |
341568e0 | 281 | |
c3f7dc68 JSP |
282 | /* Some files are simply not modifiable. */ |
283 | if ((amode & VWRITE) && (fmode & (S_IWUSR|S_IWGRP|S_IWOTH)) == 0) | |
284 | return (EPERM); | |
8015f948 | 285 | |
c3f7dc68 JSP |
286 | /* Root can do anything else. */ |
287 | if (cred->cr_uid == 0) | |
341568e0 | 288 | return (0); |
341568e0 | 289 | |
c3f7dc68 JSP |
290 | /* Check for group 0 (wheel) permissions. */ |
291 | for (i = 0, gp = cred->cr_groups; i < cred->cr_ngroups; i++, gp++) | |
292 | if (*gp == 0) { | |
293 | if (amode & VEXEC) | |
294 | mask |= S_IXGRP; | |
295 | if (amode & VREAD) | |
296 | mask |= S_IRGRP; | |
297 | if (amode & VWRITE) | |
298 | mask |= S_IWGRP; | |
299 | return ((fmode & mask) == mask ? 0 : EACCES); | |
300 | } | |
341568e0 | 301 | |
c3f7dc68 JSP |
302 | /* Otherwise, check everyone else. */ |
303 | if (amode & VEXEC) | |
304 | mask |= S_IXOTH; | |
305 | if (amode & VREAD) | |
306 | mask |= S_IROTH; | |
307 | if (amode & VWRITE) | |
308 | mask |= S_IWOTH; | |
309 | return ((fmode & mask) == mask ? 0 : EACCES); | |
341568e0 JSP |
310 | } |
311 | ||
341568e0 JSP |
312 | kernfs_getattr(ap) |
313 | struct vop_getattr_args /* { | |
314 | struct vnode *a_vp; | |
315 | struct vattr *a_vap; | |
316 | struct ucred *a_cred; | |
317 | struct proc *a_p; | |
318 | } */ *ap; | |
319 | { | |
320 | struct vnode *vp = ap->a_vp; | |
321 | struct vattr *vap = ap->a_vap; | |
194bbe41 | 322 | struct timeval tv; |
341568e0 JSP |
323 | int error = 0; |
324 | char strbuf[KSTRING]; | |
341568e0 JSP |
325 | |
326 | bzero((caddr_t) vap, sizeof(*vap)); | |
327 | vattr_null(vap); | |
328 | vap->va_uid = 0; | |
329 | vap->va_gid = 0; | |
330 | vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; | |
c3f7dc68 | 331 | vap->va_size = 0; |
341568e0 | 332 | vap->va_blocksize = DEV_BSIZE; |
194bbe41 CD |
333 | microtime(&tv); |
334 | TIMEVAL_TO_TIMESPEC(&tv, &vap->va_atime); | |
341568e0 JSP |
335 | vap->va_mtime = vap->va_atime; |
336 | vap->va_ctime = vap->va_ctime; | |
337 | vap->va_gen = 0; | |
338 | vap->va_flags = 0; | |
339 | vap->va_rdev = 0; | |
341568e0 JSP |
340 | vap->va_bytes = 0; |
341 | ||
342 | if (vp->v_flag & VROOT) { | |
343 | #ifdef KERNFS_DIAGNOSTIC | |
344 | printf("kernfs_getattr: stat rootdir\n"); | |
345 | #endif | |
346 | vap->va_type = VDIR; | |
a1e23f7a | 347 | vap->va_mode = DIR_MODE; |
341568e0 JSP |
348 | vap->va_nlink = 2; |
349 | vap->va_fileid = 2; | |
350 | vap->va_size = DEV_BSIZE; | |
351 | } else { | |
8015f948 | 352 | struct kern_target *kt = VTOKERN(vp)->kf_kt; |
341568e0 JSP |
353 | int nbytes; |
354 | #ifdef KERNFS_DIAGNOSTIC | |
355 | printf("kernfs_getattr: stat target %s\n", kt->kt_name); | |
356 | #endif | |
357 | vap->va_type = kt->kt_vtype; | |
c3f7dc68 | 358 | vap->va_mode = kt->kt_mode; |
341568e0 | 359 | vap->va_nlink = 1; |
c3f7dc68 | 360 | vap->va_fileid = 1 + (kt - kern_targets) / sizeof(*kt); |
341568e0 JSP |
361 | error = kernfs_xread(kt, strbuf, sizeof(strbuf), &nbytes); |
362 | vap->va_size = nbytes; | |
363 | } | |
364 | ||
341568e0 JSP |
365 | #ifdef KERNFS_DIAGNOSTIC |
366 | printf("kernfs_getattr: return error %d\n", error); | |
367 | #endif | |
368 | return (error); | |
369 | } | |
370 | ||
371 | kernfs_setattr(ap) | |
372 | struct vop_setattr_args /* { | |
373 | struct vnode *a_vp; | |
374 | struct vattr *a_vap; | |
375 | struct ucred *a_cred; | |
376 | struct proc *a_p; | |
377 | } */ *ap; | |
378 | { | |
379 | ||
380 | /* | |
381 | * Silently ignore attribute changes. | |
382 | * This allows for open with truncate to have no | |
383 | * effect until some data is written. I want to | |
384 | * do it this way because all writes are atomic. | |
385 | */ | |
386 | return (0); | |
387 | } | |
388 | ||
389 | static int | |
390 | kernfs_read(ap) | |
391 | struct vop_read_args /* { | |
392 | struct vnode *a_vp; | |
393 | struct uio *a_uio; | |
394 | int a_ioflag; | |
395 | struct ucred *a_cred; | |
396 | } */ *ap; | |
397 | { | |
398 | struct vnode *vp = ap->a_vp; | |
399 | struct uio *uio = ap->a_uio; | |
8015f948 | 400 | struct kern_target *kt; |
341568e0 JSP |
401 | char strbuf[KSTRING]; |
402 | int off = uio->uio_offset; | |
1f3d196a KB |
403 | int error, len; |
404 | char *cp; | |
8015f948 | 405 | |
c3f7dc68 | 406 | if (vp->v_type == VDIR) |
b5fd929e | 407 | return (EOPNOTSUPP); |
8015f948 KM |
408 | |
409 | kt = VTOKERN(vp)->kf_kt; | |
410 | ||
341568e0 JSP |
411 | #ifdef KERNFS_DIAGNOSTIC |
412 | printf("kern_read %s\n", kt->kt_name); | |
413 | #endif | |
414 | ||
1f3d196a | 415 | len = 0; |
c3f7dc68 | 416 | if (error = kernfs_xread(kt, strbuf, sizeof(strbuf), &len)) |
341568e0 | 417 | return (error); |
c3f7dc68 JSP |
418 | if (len <= off) |
419 | return (0); | |
420 | return (uiomove(&strbuf[off], len - off, uio)); | |
341568e0 JSP |
421 | } |
422 | ||
423 | static int | |
424 | kernfs_write(ap) | |
425 | struct vop_write_args /* { | |
426 | struct vnode *a_vp; | |
427 | struct uio *a_uio; | |
428 | int a_ioflag; | |
429 | struct ucred *a_cred; | |
430 | } */ *ap; | |
431 | { | |
432 | struct vnode *vp = ap->a_vp; | |
433 | struct uio *uio = ap->a_uio; | |
8015f948 | 434 | struct kern_target *kt; |
1f3d196a | 435 | int error, xlen; |
341568e0 | 436 | char strbuf[KSTRING]; |
341568e0 | 437 | |
c3f7dc68 JSP |
438 | if (vp->v_type == VDIR) |
439 | return (EOPNOTSUPP); | |
8015f948 KM |
440 | |
441 | kt = VTOKERN(vp)->kf_kt; | |
442 | ||
341568e0 JSP |
443 | if (uio->uio_offset != 0) |
444 | return (EINVAL); | |
445 | ||
446 | xlen = min(uio->uio_resid, KSTRING-1); | |
c3f7dc68 | 447 | if (error = uiomove(strbuf, xlen, uio)) |
341568e0 JSP |
448 | return (error); |
449 | ||
450 | if (uio->uio_resid != 0) | |
451 | return (EIO); | |
452 | ||
453 | strbuf[xlen] = '\0'; | |
650e78ba | 454 | xlen = strlen(strbuf); |
341568e0 JSP |
455 | return (kernfs_xwrite(kt, strbuf, xlen)); |
456 | } | |
457 | ||
341568e0 JSP |
458 | kernfs_readdir(ap) |
459 | struct vop_readdir_args /* { | |
460 | struct vnode *a_vp; | |
461 | struct uio *a_uio; | |
462 | struct ucred *a_cred; | |
94b29fae KM |
463 | int *a_eofflag; |
464 | u_long *a_cookies; | |
465 | int a_ncookies; | |
341568e0 JSP |
466 | } */ *ap; |
467 | { | |
c3f7dc68 | 468 | int error, i; |
341568e0 | 469 | struct uio *uio = ap->a_uio; |
c3f7dc68 JSP |
470 | struct kern_target *kt; |
471 | struct dirent d; | |
472 | ||
473 | if (ap->a_vp->v_type != VDIR) | |
474 | return (ENOTDIR); | |
341568e0 | 475 | |
94b29fae KM |
476 | /* |
477 | * We don't allow exporting kernfs mounts, and currently local | |
478 | * requests do not need cookies. | |
479 | */ | |
c3f7dc68 | 480 | if (ap->a_ncookies != NULL) |
94b29fae KM |
481 | panic("kernfs_readdir: not hungry"); |
482 | ||
341568e0 JSP |
483 | i = uio->uio_offset / UIO_MX; |
484 | error = 0; | |
c3f7dc68 JSP |
485 | for (kt = &kern_targets[i]; |
486 | uio->uio_resid >= UIO_MX && i < nkern_targets; kt++, i++) { | |
341568e0 | 487 | struct dirent *dp = &d; |
341568e0 JSP |
488 | #ifdef KERNFS_DIAGNOSTIC |
489 | printf("kernfs_readdir: i = %d\n", i); | |
490 | #endif | |
491 | ||
c3f7dc68 JSP |
492 | if (kt->kt_tag == KTT_DEVICE) { |
493 | dev_t *dp = kt->kt_data; | |
494 | struct vnode *fvp; | |
341568e0 | 495 | |
c3f7dc68 JSP |
496 | if (*dp == NODEV || !vfinddev(*dp, kt->kt_vtype, &fvp)) |
497 | continue; | |
498 | } | |
499 | ||
500 | bzero((caddr_t)dp, UIO_MX); | |
501 | dp->d_namlen = kt->kt_namlen; | |
502 | bcopy(kt->kt_name, dp->d_name, kt->kt_namlen+1); | |
341568e0 JSP |
503 | |
504 | #ifdef KERNFS_DIAGNOSTIC | |
505 | printf("kernfs_readdir: name = %s, len = %d\n", | |
506 | dp->d_name, dp->d_namlen); | |
507 | #endif | |
508 | /* | |
509 | * Fill in the remaining fields | |
510 | */ | |
511 | dp->d_reclen = UIO_MX; | |
512 | dp->d_fileno = i + 3; | |
c3f7dc68 | 513 | dp->d_type = kt->kt_type; |
341568e0 JSP |
514 | /* |
515 | * And ship to userland | |
516 | */ | |
c3f7dc68 | 517 | if (error = uiomove((caddr_t)dp, UIO_MX, uio)) |
341568e0 | 518 | break; |
341568e0 JSP |
519 | } |
520 | ||
521 | uio->uio_offset = i * UIO_MX; | |
522 | ||
523 | return (error); | |
524 | } | |
525 | ||
526 | kernfs_inactive(ap) | |
527 | struct vop_inactive_args /* { | |
528 | struct vnode *a_vp; | |
529 | } */ *ap; | |
530 | { | |
531 | struct vnode *vp = ap->a_vp; | |
532 | ||
c3f7dc68 JSP |
533 | #ifdef KERNFS_DIAGNOSTIC |
534 | printf("kernfs_inactive(%x)\n", vp); | |
535 | #endif | |
341568e0 JSP |
536 | /* |
537 | * Clear out the v_type field to avoid | |
538 | * nasty things happening in vgone(). | |
539 | */ | |
540 | vp->v_type = VNON; | |
341568e0 JSP |
541 | return (0); |
542 | } | |
543 | ||
544 | kernfs_reclaim(ap) | |
545 | struct vop_reclaim_args /* { | |
546 | struct vnode *a_vp; | |
547 | } */ *ap; | |
548 | { | |
549 | struct vnode *vp = ap->a_vp; | |
c3f7dc68 | 550 | |
ae51ce7d | 551 | #ifdef KERNFS_DIAGNOSTIC |
341568e0 | 552 | printf("kernfs_reclaim(%x)\n", vp); |
ae51ce7d | 553 | #endif |
341568e0 JSP |
554 | if (vp->v_data) { |
555 | FREE(vp->v_data, M_TEMP); | |
556 | vp->v_data = 0; | |
557 | } | |
558 | return (0); | |
559 | } | |
560 | ||
0020ca6e JSP |
561 | /* |
562 | * Return POSIX pathconf information applicable to special devices. | |
563 | */ | |
564 | kernfs_pathconf(ap) | |
565 | struct vop_pathconf_args /* { | |
566 | struct vnode *a_vp; | |
567 | int a_name; | |
568 | int *a_retval; | |
569 | } */ *ap; | |
570 | { | |
571 | ||
572 | switch (ap->a_name) { | |
573 | case _PC_LINK_MAX: | |
574 | *ap->a_retval = LINK_MAX; | |
575 | return (0); | |
576 | case _PC_MAX_CANON: | |
577 | *ap->a_retval = MAX_CANON; | |
578 | return (0); | |
579 | case _PC_MAX_INPUT: | |
580 | *ap->a_retval = MAX_INPUT; | |
581 | return (0); | |
582 | case _PC_PIPE_BUF: | |
583 | *ap->a_retval = PIPE_BUF; | |
584 | return (0); | |
585 | case _PC_CHOWN_RESTRICTED: | |
586 | *ap->a_retval = 1; | |
587 | return (0); | |
588 | case _PC_VDISABLE: | |
589 | *ap->a_retval = _POSIX_VDISABLE; | |
590 | return (0); | |
591 | default: | |
592 | return (EINVAL); | |
593 | } | |
594 | /* NOTREACHED */ | |
595 | } | |
596 | ||
341568e0 JSP |
597 | /* |
598 | * Print out the contents of a /dev/fd vnode. | |
599 | */ | |
600 | /* ARGSUSED */ | |
601 | kernfs_print(ap) | |
602 | struct vop_print_args /* { | |
603 | struct vnode *a_vp; | |
604 | } */ *ap; | |
605 | { | |
606 | ||
46a14367 | 607 | printf("tag VT_KERNFS, kernfs vnode\n"); |
341568e0 JSP |
608 | return (0); |
609 | } | |
610 | ||
611 | /*void*/ | |
612 | kernfs_vfree(ap) | |
613 | struct vop_vfree_args /* { | |
614 | struct vnode *a_pvp; | |
615 | ino_t a_ino; | |
616 | int a_mode; | |
617 | } */ *ap; | |
618 | { | |
619 | ||
620 | return (0); | |
621 | } | |
622 | ||
341568e0 JSP |
623 | /* |
624 | * /dev/fd "should never get here" operation | |
625 | */ | |
626 | kernfs_badop() | |
627 | { | |
628 | ||
629 | panic("kernfs: bad op"); | |
630 | /* NOTREACHED */ | |
631 | } | |
632 | ||
633 | /* | |
fea856fc | 634 | * kernfs vnode null operation |
341568e0 JSP |
635 | */ |
636 | kernfs_nullop() | |
637 | { | |
638 | ||
639 | return (0); | |
640 | } | |
641 | ||
728dcff6 KM |
642 | #define kernfs_create ((int (*) __P((struct vop_create_args *)))eopnotsupp) |
643 | #define kernfs_mknod ((int (*) __P((struct vop_mknod_args *)))eopnotsupp) | |
341568e0 | 644 | #define kernfs_close ((int (*) __P((struct vop_close_args *)))nullop) |
728dcff6 KM |
645 | #define kernfs_ioctl ((int (*) __P((struct vop_ioctl_args *)))eopnotsupp) |
646 | #define kernfs_select ((int (*) __P((struct vop_select_args *)))eopnotsupp) | |
647 | #define kernfs_revoke vop_revoke | |
648 | #define kernfs_mmap ((int (*) __P((struct vop_mmap_args *)))eopnotsupp) | |
341568e0 JSP |
649 | #define kernfs_fsync ((int (*) __P((struct vop_fsync_args *)))nullop) |
650 | #define kernfs_seek ((int (*) __P((struct vop_seek_args *)))nullop) | |
728dcff6 KM |
651 | #define kernfs_remove ((int (*) __P((struct vop_remove_args *)))eopnotsupp) |
652 | #define kernfs_link ((int (*) __P((struct vop_link_args *)))eopnotsupp) | |
653 | #define kernfs_rename ((int (*) __P((struct vop_rename_args *)))eopnotsupp) | |
654 | #define kernfs_mkdir ((int (*) __P((struct vop_mkdir_args *)))eopnotsupp) | |
655 | #define kernfs_rmdir ((int (*) __P((struct vop_rmdir_args *)))eopnotsupp) | |
656 | #define kernfs_symlink ((int (*) __P((struct vop_symlink_args *)))eopnotsupp) | |
657 | #define kernfs_readlink ((int (*) __P((struct vop_readlink_args *)))eopnotsupp) | |
341568e0 JSP |
658 | #define kernfs_abortop ((int (*) __P((struct vop_abortop_args *)))nullop) |
659 | #define kernfs_lock ((int (*) __P((struct vop_lock_args *)))nullop) | |
660 | #define kernfs_unlock ((int (*) __P((struct vop_unlock_args *)))nullop) | |
661 | #define kernfs_bmap ((int (*) __P((struct vop_bmap_args *)))kernfs_badop) | |
728dcff6 KM |
662 | #define kernfs_strategy \ |
663 | ((int (*) __P((struct vop_strategy_args *)))kernfs_badop) | |
341568e0 | 664 | #define kernfs_islocked ((int (*) __P((struct vop_islocked_args *)))nullop) |
728dcff6 KM |
665 | #define kernfs_advlock ((int (*) __P((struct vop_advlock_args *)))eopnotsupp) |
666 | #define kernfs_blkatoff ((int (*) __P((struct vop_blkatoff_args *)))eopnotsupp) | |
341568e0 JSP |
667 | #define kernfs_valloc ((int(*) __P(( \ |
668 | struct vnode *pvp, \ | |
669 | int mode, \ | |
670 | struct ucred *cred, \ | |
728dcff6 KM |
671 | struct vnode **vpp))) eopnotsupp) |
672 | #define kernfs_truncate ((int (*) __P((struct vop_truncate_args *)))eopnotsupp) | |
673 | #define kernfs_update ((int (*) __P((struct vop_update_args *)))eopnotsupp) | |
674 | #define kernfs_bwrite ((int (*) __P((struct vop_bwrite_args *)))eopnotsupp) | |
341568e0 JSP |
675 | |
676 | int (**kernfs_vnodeop_p)(); | |
677 | struct vnodeopv_entry_desc kernfs_vnodeop_entries[] = { | |
678 | { &vop_default_desc, vn_default_error }, | |
679 | { &vop_lookup_desc, kernfs_lookup }, /* lookup */ | |
680 | { &vop_create_desc, kernfs_create }, /* create */ | |
681 | { &vop_mknod_desc, kernfs_mknod }, /* mknod */ | |
0020ca6e | 682 | { &vop_open_desc, kernfs_open }, /* open */ |
341568e0 JSP |
683 | { &vop_close_desc, kernfs_close }, /* close */ |
684 | { &vop_access_desc, kernfs_access }, /* access */ | |
685 | { &vop_getattr_desc, kernfs_getattr }, /* getattr */ | |
686 | { &vop_setattr_desc, kernfs_setattr }, /* setattr */ | |
0020ca6e | 687 | { &vop_read_desc, kernfs_read }, /* read */ |
341568e0 JSP |
688 | { &vop_write_desc, kernfs_write }, /* write */ |
689 | { &vop_ioctl_desc, kernfs_ioctl }, /* ioctl */ | |
690 | { &vop_select_desc, kernfs_select }, /* select */ | |
728dcff6 | 691 | { &vop_revoke_desc, kernfs_revoke }, /* revoke */ |
0020ca6e | 692 | { &vop_mmap_desc, kernfs_mmap }, /* mmap */ |
341568e0 | 693 | { &vop_fsync_desc, kernfs_fsync }, /* fsync */ |
0020ca6e | 694 | { &vop_seek_desc, kernfs_seek }, /* seek */ |
341568e0 | 695 | { &vop_remove_desc, kernfs_remove }, /* remove */ |
0020ca6e | 696 | { &vop_link_desc, kernfs_link }, /* link */ |
341568e0 JSP |
697 | { &vop_rename_desc, kernfs_rename }, /* rename */ |
698 | { &vop_mkdir_desc, kernfs_mkdir }, /* mkdir */ | |
699 | { &vop_rmdir_desc, kernfs_rmdir }, /* rmdir */ | |
700 | { &vop_symlink_desc, kernfs_symlink }, /* symlink */ | |
701 | { &vop_readdir_desc, kernfs_readdir }, /* readdir */ | |
0020ca6e | 702 | { &vop_readlink_desc, kernfs_readlink },/* readlink */ |
341568e0 | 703 | { &vop_abortop_desc, kernfs_abortop }, /* abortop */ |
0020ca6e | 704 | { &vop_inactive_desc, kernfs_inactive },/* inactive */ |
341568e0 | 705 | { &vop_reclaim_desc, kernfs_reclaim }, /* reclaim */ |
0020ca6e | 706 | { &vop_lock_desc, kernfs_lock }, /* lock */ |
341568e0 | 707 | { &vop_unlock_desc, kernfs_unlock }, /* unlock */ |
0020ca6e JSP |
708 | { &vop_bmap_desc, kernfs_bmap }, /* bmap */ |
709 | { &vop_strategy_desc, kernfs_strategy },/* strategy */ | |
341568e0 | 710 | { &vop_print_desc, kernfs_print }, /* print */ |
0020ca6e JSP |
711 | { &vop_islocked_desc, kernfs_islocked },/* islocked */ |
712 | { &vop_pathconf_desc, kernfs_pathconf },/* pathconf */ | |
341568e0 | 713 | { &vop_advlock_desc, kernfs_advlock }, /* advlock */ |
0020ca6e | 714 | { &vop_blkatoff_desc, kernfs_blkatoff },/* blkatoff */ |
341568e0 JSP |
715 | { &vop_valloc_desc, kernfs_valloc }, /* valloc */ |
716 | { &vop_vfree_desc, kernfs_vfree }, /* vfree */ | |
0020ca6e | 717 | { &vop_truncate_desc, kernfs_truncate },/* truncate */ |
341568e0 JSP |
718 | { &vop_update_desc, kernfs_update }, /* update */ |
719 | { &vop_bwrite_desc, kernfs_bwrite }, /* bwrite */ | |
720 | { (struct vnodeop_desc*)NULL, (int(*)())NULL } | |
721 | }; | |
722 | struct vnodeopv_desc kernfs_vnodeop_opv_desc = | |
723 | { &kernfs_vnodeop_p, kernfs_vnodeop_entries }; |