coda_subr.c revision 1.33 1 1.33 thorpej /* $NetBSD: coda_subr.c,v 1.33 2024/05/17 23:57:46 thorpej Exp $ */
2 1.2 rvb
3 1.1 rvb /*
4 1.17 perry *
5 1.2 rvb * Coda: an Experimental Distributed File System
6 1.2 rvb * Release 3.1
7 1.17 perry *
8 1.2 rvb * Copyright (c) 1987-1998 Carnegie Mellon University
9 1.2 rvb * All Rights Reserved
10 1.17 perry *
11 1.2 rvb * Permission to use, copy, modify and distribute this software and its
12 1.2 rvb * documentation is hereby granted, provided that both the copyright
13 1.2 rvb * notice and this permission notice appear in all copies of the
14 1.2 rvb * software, derivative works or modified versions, and any portions
15 1.2 rvb * thereof, and that both notices appear in supporting documentation, and
16 1.2 rvb * that credit is given to Carnegie Mellon University in all documents
17 1.2 rvb * and publicity pertaining to direct or indirect use of this code or its
18 1.2 rvb * derivatives.
19 1.17 perry *
20 1.2 rvb * CODA IS AN EXPERIMENTAL SOFTWARE SYSTEM AND IS KNOWN TO HAVE BUGS,
21 1.2 rvb * SOME OF WHICH MAY HAVE SERIOUS CONSEQUENCES. CARNEGIE MELLON ALLOWS
22 1.2 rvb * FREE USE OF THIS SOFTWARE IN ITS "AS IS" CONDITION. CARNEGIE MELLON
23 1.2 rvb * DISCLAIMS ANY LIABILITY OF ANY KIND FOR ANY DAMAGES WHATSOEVER
24 1.2 rvb * RESULTING DIRECTLY OR INDIRECTLY FROM THE USE OF THIS SOFTWARE OR OF
25 1.2 rvb * ANY DERIVATIVE WORK.
26 1.17 perry *
27 1.2 rvb * Carnegie Mellon encourages users of this software to return any
28 1.2 rvb * improvements or extensions that they make, and to grant Carnegie
29 1.2 rvb * Mellon the rights to redistribute these changes without encumbrance.
30 1.17 perry *
31 1.17 perry * @(#) coda/coda_subr.c,v 1.1.1.1 1998/08/29 21:26:45 rvb Exp $
32 1.2 rvb */
33 1.1 rvb
34 1.17 perry /*
35 1.1 rvb * Mach Operating System
36 1.1 rvb * Copyright (c) 1989 Carnegie-Mellon University
37 1.1 rvb * All rights reserved. The CMU software License Agreement specifies
38 1.1 rvb * the terms and conditions for use and redistribution.
39 1.1 rvb */
40 1.1 rvb
41 1.1 rvb /*
42 1.1 rvb * This code was written for the Coda file system at Carnegie Mellon
43 1.1 rvb * University. Contributers include David Steere, James Kistler, and
44 1.1 rvb * M. Satyanarayanan. */
45 1.1 rvb
46 1.1 rvb /* NOTES: rvb
47 1.3 rvb * 1. Added coda_unmounting to mark all cnodes as being UNMOUNTING. This has to
48 1.1 rvb * be done before dounmount is called. Because some of the routines that
49 1.3 rvb * dounmount calls before coda_unmounted might try to force flushes to venus.
50 1.1 rvb * The vnode pager does this.
51 1.3 rvb * 2. coda_unmounting marks all cnodes scanning coda_cache.
52 1.1 rvb * 3. cfs_checkunmounting (under DEBUG) checks all cnodes by chasing the vnodes
53 1.1 rvb * under the /coda mount point.
54 1.3 rvb * 4. coda_cacheprint (under DEBUG) prints names with vnode/cnode address
55 1.1 rvb */
56 1.13 lukem
57 1.13 lukem #include <sys/cdefs.h>
58 1.33 thorpej __KERNEL_RCSID(0, "$NetBSD: coda_subr.c,v 1.33 2024/05/17 23:57:46 thorpej Exp $");
59 1.1 rvb
60 1.1 rvb #include <sys/param.h>
61 1.1 rvb #include <sys/systm.h>
62 1.1 rvb #include <sys/proc.h>
63 1.1 rvb #include <sys/select.h>
64 1.1 rvb #include <sys/mount.h>
65 1.27 christos #include <sys/kauth.h>
66 1.1 rvb
67 1.4 rvb #include <coda/coda.h>
68 1.4 rvb #include <coda/cnode.h>
69 1.4 rvb #include <coda/coda_subr.h>
70 1.4 rvb #include <coda/coda_namecache.h>
71 1.1 rvb
72 1.26 christos int codadebug = 0;
73 1.26 christos int coda_printf_delay = 0; /* in microseconds */
74 1.26 christos int coda_vnop_print_entry = 0;
75 1.26 christos int coda_vfsop_print_entry = 0;
76 1.1 rvb
77 1.15 drochner #ifdef CODA_COMPAT_5
78 1.3 rvb #define coda_hash(fid) \
79 1.3 rvb (((fid)->Volume + (fid)->Vnode) & (CODA_CACHESIZE-1))
80 1.15 drochner #define IS_DIR(cnode) (cnode.Vnode & 0x1)
81 1.15 drochner #else
82 1.15 drochner #define coda_hash(fid) \
83 1.15 drochner (coda_f2i(fid) & (CODA_CACHESIZE-1))
84 1.15 drochner #define IS_DIR(cnode) (cnode.opaque[2] & 0x1)
85 1.15 drochner #endif
86 1.1 rvb
87 1.27 christos struct vnode *coda_ctlvp;
88 1.27 christos
89 1.1 rvb /*
90 1.30 hannken * Lookup a cnode by fid. If the cnode is dying, it is bogus so skip it.
91 1.30 hannken * The cnode is returned locked with the vnode referenced.
92 1.1 rvb */
93 1.1 rvb struct cnode *
94 1.30 hannken coda_find(CodaFid *fid)
95 1.1 rvb {
96 1.30 hannken int i;
97 1.30 hannken struct vnode *vp;
98 1.30 hannken struct cnode *cp;
99 1.1 rvb
100 1.30 hannken for (i = 0; i < NVCODA; i++) {
101 1.30 hannken if (!coda_mnttbl[i].mi_started)
102 1.30 hannken continue;
103 1.30 hannken if (vcache_get(coda_mnttbl[i].mi_vfsp,
104 1.30 hannken fid, sizeof(CodaFid), &vp) != 0)
105 1.30 hannken continue;
106 1.30 hannken mutex_enter(vp->v_interlock);
107 1.30 hannken cp = VTOC(vp);
108 1.30 hannken if (vp->v_type == VNON || cp == NULL || IS_UNMOUNTING(cp)) {
109 1.30 hannken mutex_exit(vp->v_interlock);
110 1.30 hannken vrele(vp);
111 1.30 hannken continue;
112 1.30 hannken }
113 1.30 hannken mutex_enter(&cp->c_lock);
114 1.30 hannken mutex_exit(vp->v_interlock);
115 1.1 rvb
116 1.30 hannken return cp;
117 1.30 hannken }
118 1.1 rvb
119 1.30 hannken return NULL;
120 1.1 rvb }
121 1.1 rvb
122 1.1 rvb /*
123 1.30 hannken * Iterate over all nodes attached to coda mounts.
124 1.1 rvb */
125 1.30 hannken static void
126 1.30 hannken coda_iterate(bool (*f)(void *, struct vnode *), void *cl)
127 1.1 rvb {
128 1.30 hannken int i;
129 1.30 hannken struct vnode_iterator *marker;
130 1.30 hannken struct vnode *vp;
131 1.1 rvb
132 1.30 hannken for (i = 0; i < NVCODA; i++) {
133 1.30 hannken if (coda_mnttbl[i].mi_vfsp == NULL)
134 1.30 hannken continue;
135 1.30 hannken vfs_vnode_iterator_init(coda_mnttbl[i].mi_vfsp, &marker);
136 1.30 hannken while ((vp = vfs_vnode_iterator_next(marker, f, cl)) != NULL)
137 1.30 hannken vrele(vp);
138 1.30 hannken vfs_vnode_iterator_destroy(marker);
139 1.17 perry }
140 1.1 rvb }
141 1.1 rvb
142 1.1 rvb /*
143 1.3 rvb * coda_kill is called as a side effect to vcopen. To prevent any
144 1.1 rvb * cnodes left around from an earlier run of a venus or warden from
145 1.1 rvb * causing problems with the new instance, mark any outstanding cnodes
146 1.1 rvb * as dying. Future operations on these cnodes should fail (excepting
147 1.3 rvb * coda_inactive of course!). Since multiple venii/wardens can be
148 1.1 rvb * running, only kill the cnodes for a particular entry in the
149 1.3 rvb * coda_mnttbl. -- DCS 12/1/94 */
150 1.1 rvb
151 1.30 hannken static bool
152 1.30 hannken coda_kill_selector(void *cl, struct vnode *vp)
153 1.30 hannken {
154 1.30 hannken int *count = cl;
155 1.30 hannken
156 1.30 hannken (*count)++;
157 1.30 hannken
158 1.30 hannken return false;
159 1.30 hannken }
160 1.30 hannken
161 1.1 rvb int
162 1.18 xtraeme coda_kill(struct mount *whoIam, enum dc_status dcstat)
163 1.1 rvb {
164 1.30 hannken int count = 0;
165 1.30 hannken struct vnode_iterator *marker;
166 1.17 perry
167 1.17 perry /*
168 1.17 perry * Algorithm is as follows:
169 1.1 rvb * Second, flush whatever vnodes we can from the name cache.
170 1.1 rvb */
171 1.17 perry
172 1.1 rvb /* This is slightly overkill, but should work. Eventually it'd be
173 1.1 rvb * nice to only flush those entries from the namecache that
174 1.1 rvb * reference a vnode in this vfs. */
175 1.3 rvb coda_nc_flush(dcstat);
176 1.17 perry
177 1.30 hannken
178 1.30 hannken vfs_vnode_iterator_init(whoIam, &marker);
179 1.30 hannken vfs_vnode_iterator_next(marker, coda_kill_selector, &count);
180 1.30 hannken vfs_vnode_iterator_destroy(marker);
181 1.30 hannken
182 1.1 rvb return count;
183 1.1 rvb }
184 1.1 rvb
185 1.1 rvb /*
186 1.1 rvb * There are two reasons why a cnode may be in use, it may be in the
187 1.17 perry * name cache or it may be executing.
188 1.1 rvb */
189 1.30 hannken static bool
190 1.30 hannken coda_flush_selector(void *cl, struct vnode *vp)
191 1.30 hannken {
192 1.30 hannken struct cnode *cp = VTOC(vp);
193 1.30 hannken
194 1.30 hannken if (cp != NULL && !IS_DIR(cp->c_fid)) /* only files can be executed */
195 1.30 hannken coda_vmflush(cp);
196 1.30 hannken
197 1.30 hannken return false;
198 1.30 hannken }
199 1.1 rvb void
200 1.18 xtraeme coda_flush(enum dc_status dcstat)
201 1.1 rvb {
202 1.17 perry
203 1.3 rvb coda_clstat.ncalls++;
204 1.3 rvb coda_clstat.reqs[CODA_FLUSH]++;
205 1.17 perry
206 1.3 rvb coda_nc_flush(dcstat); /* flush files from the name cache */
207 1.1 rvb
208 1.30 hannken coda_iterate(coda_flush_selector, NULL);
209 1.1 rvb }
210 1.1 rvb
211 1.1 rvb /*
212 1.1 rvb * As a debugging measure, print out any cnodes that lived through a
213 1.17 perry * name cache flush.
214 1.1 rvb */
215 1.30 hannken static bool
216 1.30 hannken coda_testflush_selector(void *cl, struct vnode *vp)
217 1.30 hannken {
218 1.30 hannken struct cnode *cp = VTOC(vp);
219 1.30 hannken
220 1.30 hannken if (cp != NULL)
221 1.30 hannken myprintf(("Live cnode fid %s count %d\n",
222 1.32 ad coda_f2s(&cp->c_fid), vrefcnt(CTOV(cp))));
223 1.30 hannken
224 1.30 hannken return false;
225 1.30 hannken }
226 1.1 rvb void
227 1.3 rvb coda_testflush(void)
228 1.1 rvb {
229 1.17 perry
230 1.30 hannken coda_iterate(coda_testflush_selector, NULL);
231 1.1 rvb }
232 1.1 rvb
233 1.1 rvb /*
234 1.1 rvb * First, step through all cnodes and mark them unmounting.
235 1.1 rvb * NetBSD kernels may try to fsync them now that venus
236 1.1 rvb * is dead, which would be a bad thing.
237 1.1 rvb *
238 1.1 rvb */
239 1.30 hannken static bool
240 1.30 hannken coda_unmounting_selector(void *cl, struct vnode *vp)
241 1.30 hannken {
242 1.30 hannken struct cnode *cp = VTOC(vp);
243 1.30 hannken
244 1.30 hannken if (cp)
245 1.30 hannken cp->c_flags |= C_UNMOUNTING;
246 1.30 hannken
247 1.30 hannken return false;
248 1.30 hannken }
249 1.1 rvb void
250 1.18 xtraeme coda_unmounting(struct mount *whoIam)
251 1.17 perry {
252 1.30 hannken struct vnode_iterator *marker;
253 1.1 rvb
254 1.30 hannken vfs_vnode_iterator_init(whoIam, &marker);
255 1.30 hannken vfs_vnode_iterator_next(marker, coda_unmounting_selector, NULL);
256 1.30 hannken vfs_vnode_iterator_destroy(marker);
257 1.1 rvb }
258 1.1 rvb
259 1.1 rvb #ifdef DEBUG
260 1.30 hannken static bool
261 1.30 hannken coda_checkunmounting_selector(void *cl, struct vnode *vp)
262 1.30 hannken {
263 1.30 hannken struct cnode *cp = VTOC(vp);
264 1.30 hannken
265 1.30 hannken if (cp && !(cp->c_flags & C_UNMOUNTING)) {
266 1.30 hannken printf("vp %p, cp %p missed\n", vp, cp);
267 1.30 hannken cp->c_flags |= C_UNMOUNTING;
268 1.30 hannken }
269 1.30 hannken
270 1.30 hannken return false;
271 1.30 hannken }
272 1.5 rvb void
273 1.18 xtraeme coda_checkunmounting(struct mount *mp)
274 1.17 perry {
275 1.30 hannken struct vnode_iterator *marker;
276 1.30 hannken
277 1.30 hannken vfs_vnode_iterator_init(mp, &marker);
278 1.30 hannken vfs_vnode_iterator_next(marker, coda_checkunmounting_selector, NULL);
279 1.30 hannken vfs_vnode_iterator_destroy(marker);
280 1.1 rvb }
281 1.1 rvb
282 1.5 rvb void
283 1.18 xtraeme coda_cacheprint(struct mount *whoIam)
284 1.17 perry {
285 1.30 hannken struct vnode *vp;
286 1.30 hannken struct vnode_iterator *marker;
287 1.1 rvb int count = 0;
288 1.1 rvb
289 1.3 rvb printf("coda_cacheprint: coda_ctlvp %p, cp %p", coda_ctlvp, VTOC(coda_ctlvp));
290 1.5 rvb coda_nc_name(VTOC(coda_ctlvp));
291 1.1 rvb printf("\n");
292 1.1 rvb
293 1.30 hannken vfs_vnode_iterator_init(whoIam, &marker);
294 1.30 hannken while ((vp = vfs_vnode_iterator_next(marker, NULL, NULL)) != NULL) {
295 1.30 hannken printf("coda_cacheprint: vp %p, cp %p", vp, VTOC(vp));
296 1.30 hannken coda_nc_name(VTOC(vp));
297 1.30 hannken printf("\n");
298 1.30 hannken count++;
299 1.31 hannken vrele(vp);
300 1.1 rvb }
301 1.3 rvb printf("coda_cacheprint: count %d\n", count);
302 1.31 hannken vfs_vnode_iterator_destroy(marker);
303 1.1 rvb }
304 1.1 rvb #endif
305 1.1 rvb
306 1.1 rvb /*
307 1.1 rvb * There are 6 cases where invalidations occur. The semantics of each
308 1.1 rvb * is listed here.
309 1.1 rvb *
310 1.3 rvb * CODA_FLUSH -- flush all entries from the name cache and the cnode cache.
311 1.3 rvb * CODA_PURGEUSER -- flush all entries from the name cache for a specific user
312 1.1 rvb * This call is a result of token expiration.
313 1.1 rvb *
314 1.1 rvb * The next two are the result of callbacks on a file or directory.
315 1.3 rvb * CODA_ZAPDIR -- flush the attributes for the dir from its cnode.
316 1.1 rvb * Zap all children of this directory from the namecache.
317 1.3 rvb * CODA_ZAPFILE -- flush the attributes for a file.
318 1.1 rvb *
319 1.1 rvb * The fifth is a result of Venus detecting an inconsistent file.
320 1.3 rvb * CODA_PURGEFID -- flush the attribute for the file
321 1.17 perry * If it is a dir (odd vnode), purge its
322 1.1 rvb * children from the namecache
323 1.1 rvb * remove the file from the namecache.
324 1.1 rvb *
325 1.1 rvb * The sixth allows Venus to replace local fids with global ones
326 1.1 rvb * during reintegration.
327 1.1 rvb *
328 1.17 perry * CODA_REPLACE -- replace one CodaFid with another throughout the name cache
329 1.1 rvb */
330 1.1 rvb
331 1.18 xtraeme int handleDownCall(int opcode, union outputArgs *out)
332 1.1 rvb {
333 1.1 rvb int error;
334 1.1 rvb
335 1.1 rvb /* Handle invalidate requests. */
336 1.1 rvb switch (opcode) {
337 1.3 rvb case CODA_FLUSH : {
338 1.1 rvb
339 1.3 rvb coda_flush(IS_DOWNCALL);
340 1.17 perry
341 1.3 rvb CODADEBUG(CODA_FLUSH,coda_testflush();) /* print remaining cnodes */
342 1.1 rvb return(0);
343 1.1 rvb }
344 1.17 perry
345 1.3 rvb case CODA_PURGEUSER : {
346 1.3 rvb coda_clstat.ncalls++;
347 1.3 rvb coda_clstat.reqs[CODA_PURGEUSER]++;
348 1.17 perry
349 1.1 rvb /* XXX - need to prevent fsync's */
350 1.15 drochner #ifdef CODA_COMPAT_5
351 1.3 rvb coda_nc_purge_user(out->coda_purgeuser.cred.cr_uid, IS_DOWNCALL);
352 1.15 drochner #else
353 1.15 drochner coda_nc_purge_user(out->coda_purgeuser.uid, IS_DOWNCALL);
354 1.15 drochner #endif
355 1.1 rvb return(0);
356 1.1 rvb }
357 1.17 perry
358 1.3 rvb case CODA_ZAPFILE : {
359 1.1 rvb struct cnode *cp;
360 1.1 rvb
361 1.1 rvb error = 0;
362 1.3 rvb coda_clstat.ncalls++;
363 1.3 rvb coda_clstat.reqs[CODA_ZAPFILE]++;
364 1.17 perry
365 1.15 drochner cp = coda_find(&out->coda_zapfile.Fid);
366 1.1 rvb if (cp != NULL) {
367 1.1 rvb cp->c_flags &= ~C_VATTR;
368 1.24 ad if (CTOV(cp)->v_iflag & VI_TEXT)
369 1.3 rvb error = coda_vmflush(cp);
370 1.11 lukem CODADEBUG(CODA_ZAPFILE, myprintf((
371 1.15 drochner "zapfile: fid = %s, refcnt = %d, error = %d\n",
372 1.32 ad coda_f2s(&cp->c_fid), vrefcnt(CTOV(cp)) - 1, error)););
373 1.32 ad if (vrefcnt(CTOV(cp)) == 1) {
374 1.1 rvb cp->c_flags |= C_PURGING;
375 1.1 rvb }
376 1.30 hannken mutex_exit(&cp->c_lock);
377 1.1 rvb vrele(CTOV(cp));
378 1.1 rvb }
379 1.17 perry
380 1.1 rvb return(error);
381 1.1 rvb }
382 1.17 perry
383 1.3 rvb case CODA_ZAPDIR : {
384 1.1 rvb struct cnode *cp;
385 1.1 rvb
386 1.3 rvb coda_clstat.ncalls++;
387 1.3 rvb coda_clstat.reqs[CODA_ZAPDIR]++;
388 1.17 perry
389 1.15 drochner cp = coda_find(&out->coda_zapdir.Fid);
390 1.1 rvb if (cp != NULL) {
391 1.1 rvb cp->c_flags &= ~C_VATTR;
392 1.17 perry coda_nc_zapParentfid(&out->coda_zapdir.Fid, IS_DOWNCALL);
393 1.17 perry
394 1.11 lukem CODADEBUG(CODA_ZAPDIR, myprintf((
395 1.15 drochner "zapdir: fid = %s, refcnt = %d\n",
396 1.32 ad coda_f2s(&cp->c_fid), vrefcnt(CTOV(cp)) - 1)););
397 1.32 ad if (vrefcnt(CTOV(cp)) == 1) {
398 1.1 rvb cp->c_flags |= C_PURGING;
399 1.1 rvb }
400 1.30 hannken mutex_exit(&cp->c_lock);
401 1.1 rvb vrele(CTOV(cp));
402 1.1 rvb }
403 1.17 perry
404 1.1 rvb return(0);
405 1.1 rvb }
406 1.17 perry
407 1.3 rvb case CODA_PURGEFID : {
408 1.1 rvb struct cnode *cp;
409 1.1 rvb
410 1.1 rvb error = 0;
411 1.3 rvb coda_clstat.ncalls++;
412 1.3 rvb coda_clstat.reqs[CODA_PURGEFID]++;
413 1.1 rvb
414 1.15 drochner cp = coda_find(&out->coda_purgefid.Fid);
415 1.1 rvb if (cp != NULL) {
416 1.15 drochner if (IS_DIR(out->coda_purgefid.Fid)) { /* Vnode is a directory */
417 1.15 drochner coda_nc_zapParentfid(&out->coda_purgefid.Fid,
418 1.17 perry IS_DOWNCALL);
419 1.1 rvb }
420 1.1 rvb cp->c_flags &= ~C_VATTR;
421 1.15 drochner coda_nc_zapfid(&out->coda_purgefid.Fid, IS_DOWNCALL);
422 1.17 perry if (!(IS_DIR(out->coda_purgefid.Fid))
423 1.24 ad && (CTOV(cp)->v_iflag & VI_TEXT)) {
424 1.17 perry
425 1.3 rvb error = coda_vmflush(cp);
426 1.1 rvb }
427 1.15 drochner CODADEBUG(CODA_PURGEFID, myprintf((
428 1.15 drochner "purgefid: fid = %s, refcnt = %d, error = %d\n",
429 1.32 ad coda_f2s(&cp->c_fid), vrefcnt(CTOV(cp)) - 1, error)););
430 1.32 ad if (vrefcnt(CTOV(cp)) == 1) {
431 1.1 rvb cp->c_flags |= C_PURGING;
432 1.1 rvb }
433 1.30 hannken mutex_exit(&cp->c_lock);
434 1.1 rvb vrele(CTOV(cp));
435 1.1 rvb }
436 1.1 rvb return(error);
437 1.1 rvb }
438 1.1 rvb
439 1.3 rvb case CODA_REPLACE : {
440 1.1 rvb struct cnode *cp = NULL;
441 1.1 rvb
442 1.3 rvb coda_clstat.ncalls++;
443 1.3 rvb coda_clstat.reqs[CODA_REPLACE]++;
444 1.17 perry
445 1.3 rvb cp = coda_find(&out->coda_replace.OldFid);
446 1.17 perry if (cp != NULL) {
447 1.30 hannken error = vcache_rekey_enter(CTOV(cp)->v_mount, CTOV(cp),
448 1.30 hannken &out->coda_replace.OldFid, sizeof(CodaFid),
449 1.30 hannken &out->coda_replace.NewFid, sizeof(CodaFid));
450 1.30 hannken if (error) {
451 1.30 hannken mutex_exit(&cp->c_lock);
452 1.30 hannken vrele(CTOV(cp));
453 1.30 hannken return error;
454 1.30 hannken }
455 1.3 rvb cp->c_fid = out->coda_replace.NewFid;
456 1.30 hannken vcache_rekey_exit(CTOV(cp)->v_mount, CTOV(cp),
457 1.30 hannken &out->coda_replace.OldFid, sizeof(CodaFid),
458 1.30 hannken &cp->c_fid, sizeof(CodaFid));
459 1.3 rvb
460 1.15 drochner CODADEBUG(CODA_REPLACE, myprintf((
461 1.15 drochner "replace: oldfid = %s, newfid = %s, cp = %p\n",
462 1.15 drochner coda_f2s(&out->coda_replace.OldFid),
463 1.15 drochner coda_f2s(&cp->c_fid), cp));)
464 1.30 hannken mutex_exit(&cp->c_lock);
465 1.1 rvb vrele(CTOV(cp));
466 1.1 rvb }
467 1.1 rvb return (0);
468 1.1 rvb }
469 1.1 rvb default:
470 1.1 rvb myprintf(("handleDownCall: unknown opcode %d\n", opcode));
471 1.1 rvb return (EINVAL);
472 1.1 rvb }
473 1.1 rvb }
474 1.1 rvb
475 1.3 rvb /* coda_grab_vnode: lives in either cfs_mach.c or cfs_nbsd.c */
476 1.1 rvb
477 1.1 rvb int
478 1.22 christos coda_vmflush(struct cnode *cp)
479 1.1 rvb {
480 1.1 rvb return 0;
481 1.1 rvb }
482 1.1 rvb
483 1.1 rvb
484 1.17 perry /*
485 1.1 rvb * kernel-internal debugging switches
486 1.1 rvb */
487 1.1 rvb
488 1.3 rvb void coda_debugon(void)
489 1.1 rvb {
490 1.3 rvb codadebug = -1;
491 1.3 rvb coda_nc_debug = -1;
492 1.3 rvb coda_vnop_print_entry = 1;
493 1.3 rvb coda_psdev_print_entry = 1;
494 1.3 rvb coda_vfsop_print_entry = 1;
495 1.3 rvb }
496 1.3 rvb
497 1.3 rvb void coda_debugoff(void)
498 1.3 rvb {
499 1.3 rvb codadebug = 0;
500 1.3 rvb coda_nc_debug = 0;
501 1.3 rvb coda_vnop_print_entry = 0;
502 1.3 rvb coda_psdev_print_entry = 0;
503 1.3 rvb coda_vfsop_print_entry = 0;
504 1.1 rvb }
505 1.1 rvb
506 1.27 christos /* How to print a ucred */
507 1.27 christos void
508 1.27 christos coda_print_cred(kauth_cred_t cred)
509 1.27 christos {
510 1.27 christos
511 1.27 christos uint16_t ngroups;
512 1.27 christos int i;
513 1.27 christos
514 1.27 christos myprintf(("ref %d\tuid %d\n", kauth_cred_getrefcnt(cred),
515 1.27 christos kauth_cred_geteuid(cred)));
516 1.27 christos
517 1.27 christos ngroups = kauth_cred_ngroups(cred);
518 1.27 christos for (i=0; i < ngroups; i++)
519 1.27 christos myprintf(("\tgroup %d: (%d)\n", i, kauth_cred_group(cred, i)));
520 1.27 christos myprintf(("\n"));
521 1.27 christos
522 1.27 christos }
523 1.27 christos
524 1.1 rvb /*
525 1.1 rvb * Utilities used by both client and server
526 1.1 rvb * Standard levels:
527 1.1 rvb * 0) no debugging
528 1.1 rvb * 1) hard failures
529 1.1 rvb * 2) soft failures
530 1.1 rvb * 3) current test software
531 1.1 rvb * 4) main procedure entry points
532 1.1 rvb * 5) main procedure exit points
533 1.1 rvb * 6) utility procedure entry points
534 1.1 rvb * 7) utility procedure exit points
535 1.1 rvb * 8) obscure procedure entry points
536 1.1 rvb * 9) obscure procedure exit points
537 1.1 rvb * 10) random stuff
538 1.1 rvb * 11) all <= 1
539 1.1 rvb * 12) all <= 2
540 1.1 rvb * 13) all <= 3
541 1.1 rvb * ...
542 1.1 rvb */
543