1 /*-
2 * Copyright (c) 2009 Rick Macklem, University of Guelph
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 */
27
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD: releng/9.0/sys/fs/nfsclient/nfs_clstate.c 223971 2011-07-13 00:48:36Z rmacklem $");
30
31 /*
32 * These functions implement the client side state handling for NFSv4.
33 * NFSv4 state handling:
34 * - A lockowner is used to determine lock contention, so it
35 * corresponds directly to a Posix pid. (1 to 1 mapping)
36 * - The correct granularity of an OpenOwner is not nearly so
37 * obvious. An OpenOwner does the following:
38 * - provides a serial sequencing of Open/Close/Lock-with-new-lockowner
39 * - is used to check for Open/Share contention (not applicable to
40 * this client, since all Opens are Deny_None)
41 * As such, I considered both extreme.
42 * 1 OpenOwner per ClientID - Simple to manage, but fully serializes
43 * all Open, Close and Lock (with a new lockowner) Ops.
44 * 1 OpenOwner for each Open - This one results in an OpenConfirm for
45 * every Open, for most servers.
46 * So, I chose to use the same mapping as I did for LockOwnwers.
47 * The main concern here is that you can end up with multiple Opens
48 * for the same File Handle, but on different OpenOwners (opens
49 * inherited from parents, grandparents...) and you do not know
50 * which of these the vnodeop close applies to. This is handled by
51 * delaying the Close Op(s) until all of the Opens have been closed.
52 * (It is not yet obvious if this is the correct granularity.)
53 * - How the code handles serialization:
54 * - For the ClientId, it uses an exclusive lock while getting its
55 * SetClientId and during recovery. Otherwise, it uses a shared
56 * lock via a reference count.
57 * - For the rest of the data structures, it uses an SMP mutex
58 * (once the nfs client is SMP safe) and doesn't sleep while
59 * manipulating the linked lists.
60 * - The serialization of Open/Close/Lock/LockU falls out in the
61 * "wash", since OpenOwners and LockOwners are both mapped from
62 * Posix pid. In other words, there is only one Posix pid using
63 * any given owner, so that owner is serialized. (If you change
64 * the granularity of the OpenOwner, then code must be added to
65 * serialize Ops on the OpenOwner.)
66 * - When to get rid of OpenOwners and LockOwners.
67 * - When a process exits, it calls nfscl_cleanup(), which goes
68 * through the client list looking for all Open and Lock Owners.
69 * When one is found, it is marked "defunct" or in the case of
70 * an OpenOwner without any Opens, freed.
71 * The renew thread scans for defunct Owners and gets rid of them,
72 * if it can. The LockOwners will also be deleted when the
73 * associated Open is closed.
74 * - If the LockU or Close Op(s) fail during close in a way
75 * that could be recovered upon retry, they are relinked to the
76 * ClientId's defunct open list and retried by the renew thread
77 * until they succeed or an unmount/recovery occurs.
78 * (Since we are done with them, they do not need to be recovered.)
79 */
80
81 #ifndef APPLEKEXT
82 #include <fs/nfs/nfsport.h>
83
84 /*
85 * Global variables
86 */
87 extern struct nfsstats newnfsstats;
88 extern struct nfsreqhead nfsd_reqq;
89 NFSREQSPINLOCK;
90 NFSCLSTATEMUTEX;
91 int nfscl_inited = 0;
92 struct nfsclhead nfsclhead; /* Head of clientid list */
93 int nfscl_deleghighwater = NFSCLDELEGHIGHWATER;
94 #endif /* !APPLEKEXT */
95
96 static int nfscl_delegcnt = 0;
97 static int nfscl_getopen(struct nfsclownerhead *, u_int8_t *, int, u_int8_t *,
98 u_int8_t *, u_int32_t, struct nfscllockowner **, struct nfsclopen **);
99 static void nfscl_clrelease(struct nfsclclient *);
100 static void nfscl_cleanclient(struct nfsclclient *);
101 static void nfscl_expireclient(struct nfsclclient *, struct nfsmount *,
102 struct ucred *, NFSPROC_T *);
103 static int nfscl_expireopen(struct nfsclclient *, struct nfsclopen *,
104 struct nfsmount *, struct ucred *, NFSPROC_T *);
105 static void nfscl_recover(struct nfsclclient *, struct ucred *, NFSPROC_T *);
106 static void nfscl_insertlock(struct nfscllockowner *, struct nfscllock *,
107 struct nfscllock *, int);
108 static int nfscl_updatelock(struct nfscllockowner *, struct nfscllock **,
109 struct nfscllock **, int);
110 static void nfscl_delegreturnall(struct nfsclclient *, NFSPROC_T *);
111 static u_int32_t nfscl_nextcbident(void);
112 static mount_t nfscl_getmnt(u_int32_t);
113 static struct nfscldeleg *nfscl_finddeleg(struct nfsclclient *, u_int8_t *,
114 int);
115 static int nfscl_checkconflict(struct nfscllockownerhead *, struct nfscllock *,
116 u_int8_t *, struct nfscllock **);
117 static void nfscl_freealllocks(struct nfscllockownerhead *, int);
118 static int nfscl_localconflict(struct nfsclclient *, u_int8_t *, int,
119 struct nfscllock *, u_int8_t *, struct nfscldeleg *, struct nfscllock **);
120 static void nfscl_newopen(struct nfsclclient *, struct nfscldeleg *,
121 struct nfsclowner **, struct nfsclowner **, struct nfsclopen **,
122 struct nfsclopen **, u_int8_t *, u_int8_t *, int, int *);
123 static int nfscl_moveopen(vnode_t , struct nfsclclient *,
124 struct nfsmount *, struct nfsclopen *, struct nfsclowner *,
125 struct nfscldeleg *, struct ucred *, NFSPROC_T *);
126 static void nfscl_totalrecall(struct nfsclclient *);
127 static int nfscl_relock(vnode_t , struct nfsclclient *, struct nfsmount *,
128 struct nfscllockowner *, struct nfscllock *, struct ucred *, NFSPROC_T *);
129 static int nfscl_tryopen(struct nfsmount *, vnode_t , u_int8_t *, int,
130 u_int8_t *, int, u_int32_t, struct nfsclopen *, u_int8_t *, int,
131 struct nfscldeleg **, int, u_int32_t, struct ucred *, NFSPROC_T *);
132 static int nfscl_trylock(struct nfsmount *, vnode_t , u_int8_t *,
133 int, struct nfscllockowner *, int, int, u_int64_t, u_int64_t, short,
134 struct ucred *, NFSPROC_T *);
135 static int nfsrpc_reopen(struct nfsmount *, u_int8_t *, int, u_int32_t,
136 struct nfsclopen *, struct nfscldeleg **, struct ucred *, NFSPROC_T *);
137 static void nfscl_freedeleg(struct nfscldeleghead *, struct nfscldeleg *);
138 static int nfscl_errmap(struct nfsrv_descript *);
139 static void nfscl_cleanup_common(struct nfsclclient *, u_int8_t *);
140 static int nfscl_recalldeleg(struct nfsclclient *, struct nfsmount *,
141 struct nfscldeleg *, vnode_t, struct ucred *, NFSPROC_T *, int);
142 static void nfscl_freeopenowner(struct nfsclowner *, int);
143 static void nfscl_cleandeleg(struct nfscldeleg *);
144 static int nfscl_trydelegreturn(struct nfscldeleg *, struct ucred *,
145 struct nfsmount *, NFSPROC_T *);
146
147 static short nfscberr_null[] = {
148 0,
149 0,
150 };
151
152 static short nfscberr_getattr[] = {
153 NFSERR_RESOURCE,
154 NFSERR_BADHANDLE,
155 NFSERR_BADXDR,
156 NFSERR_RESOURCE,
157 NFSERR_SERVERFAULT,
158 0,
159 };
160
161 static short nfscberr_recall[] = {
162 NFSERR_RESOURCE,
163 NFSERR_BADHANDLE,
164 NFSERR_BADSTATEID,
165 NFSERR_BADXDR,
166 NFSERR_RESOURCE,
167 NFSERR_SERVERFAULT,
168 0,
169 };
170
171 static short *nfscl_cberrmap[] = {
172 nfscberr_null,
173 nfscberr_null,
174 nfscberr_null,
175 nfscberr_getattr,
176 nfscberr_recall
177 };
178
179 #define NETFAMILY(clp) \
180 (((clp)->nfsc_flags & NFSCLFLAGS_AFINET6) ? AF_INET6 : AF_INET)
181
182 /*
183 * Called for an open operation.
184 * If the nfhp argument is NULL, just get an openowner.
185 */
186 APPLESTATIC int
187 nfscl_open(vnode_t vp, u_int8_t *nfhp, int fhlen, u_int32_t amode, int usedeleg,
188 struct ucred *cred, NFSPROC_T *p, struct nfsclowner **owpp,
189 struct nfsclopen **opp, int *newonep, int *retp, int lockit)
190 {
191 struct nfsclclient *clp;
192 struct nfsclowner *owp, *nowp;
193 struct nfsclopen *op = NULL, *nop = NULL;
194 struct nfscldeleg *dp;
195 struct nfsclownerhead *ohp;
196 u_int8_t own[NFSV4CL_LOCKNAMELEN];
197 int ret;
198
199 if (newonep != NULL)
200 *newonep = 0;
201 if (opp != NULL)
202 *opp = NULL;
203 if (owpp != NULL)
204 *owpp = NULL;
205
206 /*
207 * Might need one or both of these, so MALLOC them now, to
208 * avoid a tsleep() in MALLOC later.
209 */
210 MALLOC(nowp, struct nfsclowner *, sizeof (struct nfsclowner),
211 M_NFSCLOWNER, M_WAITOK);
212 if (nfhp != NULL)
213 MALLOC(nop, struct nfsclopen *, sizeof (struct nfsclopen) +
214 fhlen - 1, M_NFSCLOPEN, M_WAITOK);
215 ret = nfscl_getcl(vp, cred, p, &clp);
216 if (ret != 0) {
217 FREE((caddr_t)nowp, M_NFSCLOWNER);
218 if (nop != NULL)
219 FREE((caddr_t)nop, M_NFSCLOPEN);
220 return (ret);
221 }
222
223 /*
224 * Get the Open iff it already exists.
225 * If none found, add the new one or return error, depending upon
226 * "create".
227 */
228 nfscl_filllockowner(p->td_proc, own, F_POSIX);
229 NFSLOCKCLSTATE();
230 dp = NULL;
231 /* First check the delegation list */
232 if (nfhp != NULL && usedeleg) {
233 LIST_FOREACH(dp, NFSCLDELEGHASH(clp, nfhp, fhlen), nfsdl_hash) {
234 if (dp->nfsdl_fhlen == fhlen &&
235 !NFSBCMP(nfhp, dp->nfsdl_fh, fhlen)) {
236 if (!(amode & NFSV4OPEN_ACCESSWRITE) ||
237 (dp->nfsdl_flags & NFSCLDL_WRITE))
238 break;
239 dp = NULL;
240 break;
241 }
242 }
243 }
244
245 if (dp != NULL)
246 ohp = &dp->nfsdl_owner;
247 else
248 ohp = &clp->nfsc_owner;
249 /* Now, search for an openowner */
250 LIST_FOREACH(owp, ohp, nfsow_list) {
251 if (!NFSBCMP(owp->nfsow_owner, own, NFSV4CL_LOCKNAMELEN))
252 break;
253 }
254
255 /*
256 * Create a new open, as required.
257 */
258 nfscl_newopen(clp, dp, &owp, &nowp, &op, &nop, own, nfhp, fhlen,
259 newonep);
260
261 /*
262 * Serialize modifications to the open owner for multiple threads
263 * within the same process using a read/write sleep lock.
264 */
265 if (lockit)
266 nfscl_lockexcl(&owp->nfsow_rwlock, NFSCLSTATEMUTEXPTR);
267 NFSUNLOCKCLSTATE();
268 if (nowp != NULL)
269 FREE((caddr_t)nowp, M_NFSCLOWNER);
270 if (nop != NULL)
271 FREE((caddr_t)nop, M_NFSCLOPEN);
272 if (owpp != NULL)
273 *owpp = owp;
274 if (opp != NULL)
275 *opp = op;
276 if (retp != NULL) {
277 if (nfhp != NULL && dp != NULL && nop == NULL)
278 /* new local open on delegation */
279 *retp = NFSCLOPEN_SETCRED;
280 else
281 *retp = NFSCLOPEN_OK;
282 }
283
284 /*
285 * Now, check the mode on the open and return the appropriate
286 * value.
287 */
288 if (op != NULL && (amode & ~(op->nfso_mode))) {
289 op->nfso_mode |= amode;
290 if (retp != NULL && dp == NULL)
291 *retp = NFSCLOPEN_DOOPEN;
292 }
293 return (0);
294 }
295
296 /*
297 * Create a new open, as required.
298 */
299 static void
300 nfscl_newopen(struct nfsclclient *clp, struct nfscldeleg *dp,
301 struct nfsclowner **owpp, struct nfsclowner **nowpp, struct nfsclopen **opp,
302 struct nfsclopen **nopp, u_int8_t *own, u_int8_t *fhp, int fhlen,
303 int *newonep)
304 {
305 struct nfsclowner *owp = *owpp, *nowp;
306 struct nfsclopen *op, *nop;
307
308 if (nowpp != NULL)
309 nowp = *nowpp;
310 else
311 nowp = NULL;
312 if (nopp != NULL)
313 nop = *nopp;
314 else
315 nop = NULL;
316 if (owp == NULL && nowp != NULL) {
317 NFSBCOPY(own, nowp->nfsow_owner, NFSV4CL_LOCKNAMELEN);
318 LIST_INIT(&nowp->nfsow_open);
319 nowp->nfsow_clp = clp;
320 nowp->nfsow_seqid = 0;
321 nowp->nfsow_defunct = 0;
322 nfscl_lockinit(&nowp->nfsow_rwlock);
323 if (dp != NULL) {
324 newnfsstats.cllocalopenowners++;
325 LIST_INSERT_HEAD(&dp->nfsdl_owner, nowp, nfsow_list);
326 } else {
327 newnfsstats.clopenowners++;
328 LIST_INSERT_HEAD(&clp->nfsc_owner, nowp, nfsow_list);
329 }
330 owp = *owpp = nowp;
331 *nowpp = NULL;
332 if (newonep != NULL)
333 *newonep = 1;
334 }
335
336 /* If an fhp has been specified, create an Open as well. */
337 if (fhp != NULL) {
338 /* and look for the correct open, based upon FH */
339 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
340 if (op->nfso_fhlen == fhlen &&
341 !NFSBCMP(op->nfso_fh, fhp, fhlen))
342 break;
343 }
344 if (op == NULL && nop != NULL) {
345 nop->nfso_own = owp;
346 nop->nfso_mode = 0;
347 nop->nfso_opencnt = 0;
348 nop->nfso_posixlock = 1;
349 nop->nfso_fhlen = fhlen;
350 NFSBCOPY(fhp, nop->nfso_fh, fhlen);
351 LIST_INIT(&nop->nfso_lock);
352 nop->nfso_stateid.seqid = 0;
353 nop->nfso_stateid.other[0] = 0;
354 nop->nfso_stateid.other[1] = 0;
355 nop->nfso_stateid.other[2] = 0;
356 if (dp != NULL) {
357 TAILQ_REMOVE(&clp->nfsc_deleg, dp, nfsdl_list);
358 TAILQ_INSERT_HEAD(&clp->nfsc_deleg, dp,
359 nfsdl_list);
360 dp->nfsdl_timestamp = NFSD_MONOSEC + 120;
361 newnfsstats.cllocalopens++;
362 } else {
363 newnfsstats.clopens++;
364 }
365 LIST_INSERT_HEAD(&owp->nfsow_open, nop, nfso_list);
366 *opp = nop;
367 *nopp = NULL;
368 if (newonep != NULL)
369 *newonep = 1;
370 } else {
371 *opp = op;
372 }
373 }
374 }
375
376 /*
377 * Called to find/add a delegation to a client.
378 */
379 APPLESTATIC int
380 nfscl_deleg(mount_t mp, struct nfsclclient *clp, u_int8_t *nfhp,
381 int fhlen, struct ucred *cred, NFSPROC_T *p, struct nfscldeleg **dpp)
382 {
383 struct nfscldeleg *dp = *dpp, *tdp;
384
385 /*
386 * First, if we have received a Read delegation for a file on a
387 * read/write file system, just return it, because they aren't
388 * useful, imho.
389 */
390 if (mp != NULL && dp != NULL && !NFSMNT_RDONLY(mp) &&
391 (dp->nfsdl_flags & NFSCLDL_READ)) {
392 (void) nfscl_trydelegreturn(dp, cred, VFSTONFS(mp), p);
393 FREE((caddr_t)dp, M_NFSCLDELEG);
394 *dpp = NULL;
395 return (0);
396 }
397
398 /* Look for the correct deleg, based upon FH */
399 NFSLOCKCLSTATE();
400 tdp = nfscl_finddeleg(clp, nfhp, fhlen);
401 if (tdp == NULL) {
402 if (dp == NULL) {
403 NFSUNLOCKCLSTATE();
404 return (NFSERR_BADSTATEID);
405 }
406 *dpp = NULL;
407 TAILQ_INSERT_HEAD(&clp->nfsc_deleg, dp, nfsdl_list);
408 LIST_INSERT_HEAD(NFSCLDELEGHASH(clp, nfhp, fhlen), dp,
409 nfsdl_hash);
410 dp->nfsdl_timestamp = NFSD_MONOSEC + 120;
411 newnfsstats.cldelegates++;
412 nfscl_delegcnt++;
413 } else {
414 /*
415 * Delegation already exists, what do we do if a new one??
416 */
417 if (dp != NULL) {
418 printf("Deleg already exists!\n");
419 FREE((caddr_t)dp, M_NFSCLDELEG);
420 *dpp = NULL;
421 } else {
422 *dpp = tdp;
423 }
424 }
425 NFSUNLOCKCLSTATE();
426 return (0);
427 }
428
429 /*
430 * Find a delegation for this file handle. Return NULL upon failure.
431 */
432 static struct nfscldeleg *
433 nfscl_finddeleg(struct nfsclclient *clp, u_int8_t *fhp, int fhlen)
434 {
435 struct nfscldeleg *dp;
436
437 LIST_FOREACH(dp, NFSCLDELEGHASH(clp, fhp, fhlen), nfsdl_hash) {
438 if (dp->nfsdl_fhlen == fhlen &&
439 !NFSBCMP(dp->nfsdl_fh, fhp, fhlen))
440 break;
441 }
442 return (dp);
443 }
444
445 /*
446 * Get a stateid for an I/O operation. First, look for an open and iff
447 * found, return either a lockowner stateid or the open stateid.
448 * If no Open is found, just return error and the special stateid of all zeros.
449 */
450 APPLESTATIC int
451 nfscl_getstateid(vnode_t vp, u_int8_t *nfhp, int fhlen, u_int32_t mode,
452 struct ucred *cred, NFSPROC_T *p, nfsv4stateid_t *stateidp,
453 void **lckpp)
454 {
455 struct nfsclclient *clp;
456 struct nfsclowner *owp;
457 struct nfsclopen *op = NULL;
458 struct nfscllockowner *lp;
459 struct nfscldeleg *dp;
460 struct nfsnode *np;
461 u_int8_t own[NFSV4CL_LOCKNAMELEN];
462 int error, done;
463
464 *lckpp = NULL;
465 /*
466 * Initially, just set the special stateid of all zeros.
467 */
468 stateidp->seqid = 0;
469 stateidp->other[0] = 0;
470 stateidp->other[1] = 0;
471 stateidp->other[2] = 0;
472 if (vnode_vtype(vp) != VREG)
473 return (EISDIR);
474 np = VTONFS(vp);
475 NFSLOCKCLSTATE();
476 clp = nfscl_findcl(VFSTONFS(vnode_mount(vp)));
477 if (clp == NULL) {
478 NFSUNLOCKCLSTATE();
479 return (EACCES);
480 }
481
482 /*
483 * Wait for recovery to complete.
484 */
485 while ((clp->nfsc_flags & NFSCLFLAGS_RECVRINPROG))
486 (void) nfsmsleep(&clp->nfsc_flags, NFSCLSTATEMUTEXPTR,
487 PZERO, "nfsrecvr", NULL);
488
489 /*
490 * First, look for a delegation.
491 */
492 LIST_FOREACH(dp, NFSCLDELEGHASH(clp, nfhp, fhlen), nfsdl_hash) {
493 if (dp->nfsdl_fhlen == fhlen &&
494 !NFSBCMP(nfhp, dp->nfsdl_fh, fhlen)) {
495 if (!(mode & NFSV4OPEN_ACCESSWRITE) ||
496 (dp->nfsdl_flags & NFSCLDL_WRITE)) {
497 stateidp->seqid = dp->nfsdl_stateid.seqid;
498 stateidp->other[0] = dp->nfsdl_stateid.other[0];
499 stateidp->other[1] = dp->nfsdl_stateid.other[1];
500 stateidp->other[2] = dp->nfsdl_stateid.other[2];
501 if (!(np->n_flag & NDELEGRECALL)) {
502 TAILQ_REMOVE(&clp->nfsc_deleg, dp,
503 nfsdl_list);
504 TAILQ_INSERT_HEAD(&clp->nfsc_deleg, dp,
505 nfsdl_list);
506 dp->nfsdl_timestamp = NFSD_MONOSEC +
507 120;
508 dp->nfsdl_rwlock.nfslock_usecnt++;
509 *lckpp = (void *)&dp->nfsdl_rwlock;
510 }
511 NFSUNLOCKCLSTATE();
512 return (0);
513 }
514 break;
515 }
516 }
517
518 if (p != NULL) {
519 /*
520 * If p != NULL, we want to search the parentage tree
521 * for a matching OpenOwner and use that.
522 */
523 nfscl_filllockowner(p->td_proc, own, F_POSIX);
524 lp = NULL;
525 error = nfscl_getopen(&clp->nfsc_owner, nfhp, fhlen, own, own,
526 mode, &lp, &op);
527 if (error == 0 && lp != NULL) {
528 stateidp->seqid =
529 lp->nfsl_stateid.seqid;
530 stateidp->other[0] =
531 lp->nfsl_stateid.other[0];
532 stateidp->other[1] =
533 lp->nfsl_stateid.other[1];
534 stateidp->other[2] =
535 lp->nfsl_stateid.other[2];
536 NFSUNLOCKCLSTATE();
537 return (0);
538 }
539 }
540 if (op == NULL) {
541 /* If not found, just look for any OpenOwner that will work. */
542 done = 0;
543 owp = LIST_FIRST(&clp->nfsc_owner);
544 while (!done && owp != NULL) {
545 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
546 if (op->nfso_fhlen == fhlen &&
547 !NFSBCMP(op->nfso_fh, nfhp, fhlen) &&
548 (mode & op->nfso_mode) == mode) {
549 done = 1;
550 break;
551 }
552 }
553 if (!done)
554 owp = LIST_NEXT(owp, nfsow_list);
555 }
556 if (!done) {
557 NFSUNLOCKCLSTATE();
558 return (ENOENT);
559 }
560 /* for read aheads or write behinds, use the open cred */
561 newnfs_copycred(&op->nfso_cred, cred);
562 }
563
564 /*
565 * No lock stateid, so return the open stateid.
566 */
567 stateidp->seqid = op->nfso_stateid.seqid;
568 stateidp->other[0] = op->nfso_stateid.other[0];
569 stateidp->other[1] = op->nfso_stateid.other[1];
570 stateidp->other[2] = op->nfso_stateid.other[2];
571 NFSUNLOCKCLSTATE();
572 return (0);
573 }
574
575 /*
576 * Search for a matching file, mode and, optionally, lockowner.
577 */
578 static int
579 nfscl_getopen(struct nfsclownerhead *ohp, u_int8_t *nfhp, int fhlen,
580 u_int8_t *openown, u_int8_t *lockown, u_int32_t mode,
581 struct nfscllockowner **lpp, struct nfsclopen **opp)
582 {
583 struct nfsclowner *owp;
584 struct nfsclopen *op, *rop, *rop2;
585 struct nfscllockowner *lp;
586 int keep_looping;
587
588 if (lpp != NULL)
589 *lpp = NULL;
590 /*
591 * rop will be set to the open to be returned. There are three
592 * variants of this, all for an open of the correct file:
593 * 1 - A match of lockown.
594 * 2 - A match of the openown, when no lockown match exists.
595 * 3 - A match for any open, if no openown or lockown match exists.
596 * Looking for #2 over #3 probably isn't necessary, but since
597 * RFC3530 is vague w.r.t. the relationship between openowners and
598 * lockowners, I think this is the safer way to go.
599 */
600 rop = NULL;
601 rop2 = NULL;
602 keep_looping = 1;
603 /* Search the client list */
604 owp = LIST_FIRST(ohp);
605 while (owp != NULL && keep_looping != 0) {
606 /* and look for the correct open */
607 op = LIST_FIRST(&owp->nfsow_open);
608 while (op != NULL && keep_looping != 0) {
609 if (op->nfso_fhlen == fhlen &&
610 !NFSBCMP(op->nfso_fh, nfhp, fhlen)
611 && (op->nfso_mode & mode) == mode) {
612 if (lpp != NULL) {
613 /* Now look for a matching lockowner. */
614 LIST_FOREACH(lp, &op->nfso_lock,
615 nfsl_list) {
616 if (!NFSBCMP(lp->nfsl_owner,
617 lockown,
618 NFSV4CL_LOCKNAMELEN)) {
619 *lpp = lp;
620 rop = op;
621 keep_looping = 0;
622 break;
623 }
624 }
625 }
626 if (rop == NULL && !NFSBCMP(owp->nfsow_owner,
627 openown, NFSV4CL_LOCKNAMELEN)) {
628 rop = op;
629 if (lpp == NULL)
630 keep_looping = 0;
631 }
632 if (rop2 == NULL)
633 rop2 = op;
634 }
635 op = LIST_NEXT(op, nfso_list);
636 }
637 owp = LIST_NEXT(owp, nfsow_list);
638 }
639 if (rop == NULL)
640 rop = rop2;
641 if (rop == NULL)
642 return (EBADF);
643 *opp = rop;
644 return (0);
645 }
646
647 /*
648 * Release use of an open owner. Called when open operations are done
649 * with the open owner.
650 */
651 APPLESTATIC void
652 nfscl_ownerrelease(struct nfsclowner *owp, __unused int error,
653 __unused int candelete, int unlocked)
654 {
655
656 if (owp == NULL)
657 return;
658 NFSLOCKCLSTATE();
659 if (!unlocked)
660 nfscl_lockunlock(&owp->nfsow_rwlock);
661 nfscl_clrelease(owp->nfsow_clp);
662 NFSUNLOCKCLSTATE();
663 }
664
665 /*
666 * Release use of an open structure under an open owner.
667 */
668 APPLESTATIC void
669 nfscl_openrelease(struct nfsclopen *op, int error, int candelete)
670 {
671 struct nfsclclient *clp;
672 struct nfsclowner *owp;
673
674 if (op == NULL)
675 return;
676 NFSLOCKCLSTATE();
677 owp = op->nfso_own;
678 nfscl_lockunlock(&owp->nfsow_rwlock);
679 clp = owp->nfsow_clp;
680 if (error && candelete && op->nfso_opencnt == 0)
681 nfscl_freeopen(op, 0);
682 nfscl_clrelease(clp);
683 NFSUNLOCKCLSTATE();
684 }
685
686 /*
687 * Called to get a clientid structure. It will optionally lock the
688 * client data structures to do the SetClientId/SetClientId_confirm,
689 * but will release that lock and return the clientid with a refernce
690 * count on it.
691 * If the "cred" argument is NULL, a new clientid should not be created.
692 * If the "p" argument is NULL, a SetClientID/SetClientIDConfirm cannot
693 * be done.
694 * It always clpp with a reference count on it, unless returning an error.
695 */
696 APPLESTATIC int
697 nfscl_getcl(vnode_t vp, struct ucred *cred, NFSPROC_T *p,
698 struct nfsclclient **clpp)
699 {
700 struct nfsclclient *clp;
701 struct nfsclclient *newclp = NULL;
702 struct nfscllockowner *lp, *nlp;
703 struct mount *mp;
704 struct nfsmount *nmp;
705 char uuid[HOSTUUIDLEN];
706 int igotlock = 0, error, trystalecnt, clidinusedelay, i;
707 u_int16_t idlen = 0;
708
709 mp = vnode_mount(vp);
710 nmp = VFSTONFS(mp);
711 if (cred != NULL) {
712 getcredhostuuid(cred, uuid, sizeof uuid);
713 idlen = strlen(uuid);
714 if (idlen > 0)
715 idlen += sizeof (u_int64_t);
716 else
717 idlen += sizeof (u_int64_t) + 16; /* 16 random bytes */
718 MALLOC(newclp, struct nfsclclient *,
719 sizeof (struct nfsclclient) + idlen - 1, M_NFSCLCLIENT,
720 M_WAITOK);
721 }
722 NFSLOCKCLSTATE();
723 /*
724 * If a forced dismount is already in progress, don't
725 * allocate a new clientid and get out now. For the case where
726 * clp != NULL, this is a harmless optimization.
727 */
728 if ((mp->mnt_kern_flag & MNTK_UNMOUNTF) != 0) {
729 NFSUNLOCKCLSTATE();
730 if (newclp != NULL)
731 free(newclp, M_NFSCLCLIENT);
732 return (EBADF);
733 }
734 clp = nmp->nm_clp;
735 if (clp == NULL) {
736 if (newclp == NULL) {
737 NFSUNLOCKCLSTATE();
738 return (EACCES);
739 }
740 clp = newclp;
741 NFSBZERO((caddr_t)clp, sizeof(struct nfsclclient) + idlen - 1);
742 clp->nfsc_idlen = idlen;
743 LIST_INIT(&clp->nfsc_owner);
744 TAILQ_INIT(&clp->nfsc_deleg);
745 for (i = 0; i < NFSCLDELEGHASHSIZE; i++)
746 LIST_INIT(&clp->nfsc_deleghash[i]);
747 LIST_INIT(&clp->nfsc_defunctlockowner);
748 clp->nfsc_flags = NFSCLFLAGS_INITED;
749 clp->nfsc_clientidrev = 1;
750 clp->nfsc_cbident = nfscl_nextcbident();
751 nfscl_fillclid(nmp->nm_clval, uuid, clp->nfsc_id,
752 clp->nfsc_idlen);
753 LIST_INSERT_HEAD(&nfsclhead, clp, nfsc_list);
754 nmp->nm_clp = clp;
755 clp->nfsc_nmp = nmp;
756 NFSUNLOCKCLSTATE();
757 nfscl_start_renewthread(clp);
758 } else {
759 NFSUNLOCKCLSTATE();
760 if (newclp != NULL)
761 FREE((caddr_t)newclp, M_NFSCLCLIENT);
762 }
763 NFSLOCKCLSTATE();
764 while ((clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID) == 0 && !igotlock &&
765 (mp->mnt_kern_flag & MNTK_UNMOUNTF) == 0)
766 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL,
767 NFSCLSTATEMUTEXPTR, mp);
768 if (!igotlock)
769 nfsv4_getref(&clp->nfsc_lock, NULL, NFSCLSTATEMUTEXPTR, mp);
770 if (igotlock == 0 && (mp->mnt_kern_flag & MNTK_UNMOUNTF) != 0) {
771 /*
772 * Both nfsv4_lock() and nfsv4_getref() know to check
773 * for MNTK_UNMOUNTF and return without sleeping to
774 * wait for the exclusive lock to be released, since it
775 * might be held by nfscl_umount() and we need to get out
776 * now for that case and not wait until nfscl_umount()
777 * releases it.
778 */
779 NFSUNLOCKCLSTATE();
780 return (EBADF);
781 }
782 NFSUNLOCKCLSTATE();
783
784 /*
785 * If it needs a clientid, do the setclientid now.
786 */
787 if ((clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID) == 0) {
788 if (!igotlock)
789 panic("nfscl_clget");
790 if (p == NULL || cred == NULL) {
791 NFSLOCKCLSTATE();
792 nfsv4_unlock(&clp->nfsc_lock, 0);
793 NFSUNLOCKCLSTATE();
794 return (EACCES);
795 }
796 /* get rid of defunct lockowners */
797 LIST_FOREACH_SAFE(lp, &clp->nfsc_defunctlockowner, nfsl_list,
798 nlp) {
799 nfscl_freelockowner(lp, 0);
800 }
801 /*
802 * If RFC3530 Sec. 14.2.33 is taken literally,
803 * NFSERR_CLIDINUSE will be returned persistently for the
804 * case where a new mount of the same file system is using
805 * a different principal. In practice, NFSERR_CLIDINUSE is
806 * only returned when there is outstanding unexpired state
807 * on the clientid. As such, try for twice the lease
808 * interval, if we know what that is. Otherwise, make a
809 * wild ass guess.
810 * The case of returning NFSERR_STALECLIENTID is far less
811 * likely, but might occur if there is a significant delay
812 * between doing the SetClientID and SetClientIDConfirm Ops,
813 * such that the server throws away the clientid before
814 * receiving the SetClientIDConfirm.
815 */
816 if (clp->nfsc_renew > 0)
817 clidinusedelay = NFSCL_LEASE(clp->nfsc_renew) * 2;
818 else
819 clidinusedelay = 120;
820 trystalecnt = 3;
821 do {
822 error = nfsrpc_setclient(VFSTONFS(vnode_mount(vp)),
823 clp, cred, p);
824 if (error == NFSERR_STALECLIENTID ||
825 error == NFSERR_STALEDONTRECOVER ||
826 error == NFSERR_CLIDINUSE) {
827 (void) nfs_catnap(PZERO, error, "nfs_setcl");
828 }
829 } while (((error == NFSERR_STALECLIENTID ||
830 error == NFSERR_STALEDONTRECOVER) && --trystalecnt > 0) ||
831 (error == NFSERR_CLIDINUSE && --clidinusedelay > 0));
832 if (error) {
833 NFSLOCKCLSTATE();
834 nfsv4_unlock(&clp->nfsc_lock, 0);
835 NFSUNLOCKCLSTATE();
836 return (error);
837 }
838 clp->nfsc_flags |= NFSCLFLAGS_HASCLIENTID;
839 }
840 if (igotlock) {
841 NFSLOCKCLSTATE();
842 nfsv4_unlock(&clp->nfsc_lock, 1);
843 NFSUNLOCKCLSTATE();
844 }
845
846 *clpp = clp;
847 return (0);
848 }
849
850 /*
851 * Get a reference to a clientid and return it, if valid.
852 */
853 APPLESTATIC struct nfsclclient *
854 nfscl_findcl(struct nfsmount *nmp)
855 {
856 struct nfsclclient *clp;
857
858 clp = nmp->nm_clp;
859 if (clp == NULL || !(clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID))
860 return (NULL);
861 return (clp);
862 }
863
864 /*
865 * Release the clientid structure. It may be locked or reference counted.
866 */
867 static void
868 nfscl_clrelease(struct nfsclclient *clp)
869 {
870
871 if (clp->nfsc_lock.nfslock_lock & NFSV4LOCK_LOCK)
872 nfsv4_unlock(&clp->nfsc_lock, 0);
873 else
874 nfsv4_relref(&clp->nfsc_lock);
875 }
876
877 /*
878 * External call for nfscl_clrelease.
879 */
880 APPLESTATIC void
881 nfscl_clientrelease(struct nfsclclient *clp)
882 {
883
884 NFSLOCKCLSTATE();
885 if (clp->nfsc_lock.nfslock_lock & NFSV4LOCK_LOCK)
886 nfsv4_unlock(&clp->nfsc_lock, 0);
887 else
888 nfsv4_relref(&clp->nfsc_lock);
889 NFSUNLOCKCLSTATE();
890 }
891
892 /*
893 * Called when wanting to lock a byte region.
894 */
895 APPLESTATIC int
896 nfscl_getbytelock(vnode_t vp, u_int64_t off, u_int64_t len,
897 short type, struct ucred *cred, NFSPROC_T *p, struct nfsclclient *rclp,
898 int recovery, void *id, int flags, u_int8_t *rownp, u_int8_t *ropenownp,
899 struct nfscllockowner **lpp, int *newonep, int *donelocallyp)
900 {
901 struct nfscllockowner *lp;
902 struct nfsclopen *op;
903 struct nfsclclient *clp;
904 struct nfscllockowner *nlp;
905 struct nfscllock *nlop, *otherlop;
906 struct nfscldeleg *dp = NULL, *ldp = NULL;
907 struct nfscllockownerhead *lhp = NULL;
908 struct nfsnode *np;
909 u_int8_t own[NFSV4CL_LOCKNAMELEN], *ownp, openown[NFSV4CL_LOCKNAMELEN];
910 u_int8_t *openownp;
911 int error = 0, ret, donelocally = 0;
912 u_int32_t mode;
913
914 /* For Lock Ops, the open mode doesn't matter, so use 0 to match any. */
915 mode = 0;
916 np = VTONFS(vp);
917 *lpp = NULL;
918 lp = NULL;
919 *newonep = 0;
920 *donelocallyp = 0;
921
922 /*
923 * Might need these, so MALLOC them now, to
924 * avoid a tsleep() in MALLOC later.
925 */
926 MALLOC(nlp, struct nfscllockowner *,
927 sizeof (struct nfscllockowner), M_NFSCLLOCKOWNER, M_WAITOK);
928 MALLOC(otherlop, struct nfscllock *,
929 sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK);
930 MALLOC(nlop, struct nfscllock *,
931 sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK);
932 nlop->nfslo_type = type;
933 nlop->nfslo_first = off;
934 if (len == NFS64BITSSET) {
935 nlop->nfslo_end = NFS64BITSSET;
936 } else {
937 nlop->nfslo_end = off + len;
938 if (nlop->nfslo_end <= nlop->nfslo_first)
939 error = NFSERR_INVAL;
940 }
941
942 if (!error) {
943 if (recovery)
944 clp = rclp;
945 else
946 error = nfscl_getcl(vp, cred, p, &clp);
947 }
948 if (error) {
949 FREE((caddr_t)nlp, M_NFSCLLOCKOWNER);
950 FREE((caddr_t)otherlop, M_NFSCLLOCK);
951 FREE((caddr_t)nlop, M_NFSCLLOCK);
952 return (error);
953 }
954
955 op = NULL;
956 if (recovery) {
957 ownp = rownp;
958 openownp = ropenownp;
959 } else {
960 nfscl_filllockowner(id, own, flags);
961 ownp = own;
962 nfscl_filllockowner(p->td_proc, openown, F_POSIX);
963 openownp = openown;
964 }
965 if (!recovery) {
966 NFSLOCKCLSTATE();
967 /*
968 * First, search for a delegation. If one exists for this file,
969 * the lock can be done locally against it, so long as there
970 * isn't a local lock conflict.
971 */
972 ldp = dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh,
973 np->n_fhp->nfh_len);
974 /* Just sanity check for correct type of delegation */
975 if (dp != NULL && ((dp->nfsdl_flags &
976 (NFSCLDL_RECALL | NFSCLDL_DELEGRET)) != 0 ||
977 (type == F_WRLCK &&
978 (dp->nfsdl_flags & NFSCLDL_WRITE) == 0)))
979 dp = NULL;
980 }
981 if (dp != NULL) {
982 /* Now, find an open and maybe a lockowner. */
983 ret = nfscl_getopen(&dp->nfsdl_owner, np->n_fhp->nfh_fh,
984 np->n_fhp->nfh_len, openownp, ownp, mode, NULL, &op);
985 if (ret)
986 ret = nfscl_getopen(&clp->nfsc_owner,
987 np->n_fhp->nfh_fh, np->n_fhp->nfh_len, openownp,
988 ownp, mode, NULL, &op);
989 if (!ret) {
990 lhp = &dp->nfsdl_lock;
991 TAILQ_REMOVE(&clp->nfsc_deleg, dp, nfsdl_list);
992 TAILQ_INSERT_HEAD(&clp->nfsc_deleg, dp, nfsdl_list);
993 dp->nfsdl_timestamp = NFSD_MONOSEC + 120;
994 donelocally = 1;
995 } else {
996 dp = NULL;
997 }
998 }
999 if (!donelocally) {
1000 /*
1001 * Get the related Open and maybe lockowner.
1002 */
1003 error = nfscl_getopen(&clp->nfsc_owner,
1004 np->n_fhp->nfh_fh, np->n_fhp->nfh_len, openownp,
1005 ownp, mode, &lp, &op);
1006 if (!error)
1007 lhp = &op->nfso_lock;
1008 }
1009 if (!error && !recovery)
1010 error = nfscl_localconflict(clp, np->n_fhp->nfh_fh,
1011 np->n_fhp->nfh_len, nlop, ownp, ldp, NULL);
1012 if (error) {
1013 if (!recovery) {
1014 nfscl_clrelease(clp);
1015 NFSUNLOCKCLSTATE();
1016 }
1017 FREE((caddr_t)nlp, M_NFSCLLOCKOWNER);
1018 FREE((caddr_t)otherlop, M_NFSCLLOCK);
1019 FREE((caddr_t)nlop, M_NFSCLLOCK);
1020 return (error);
1021 }
1022
1023 /*
1024 * Ok, see if a lockowner exists and create one, as required.
1025 */
1026 if (lp == NULL)
1027 LIST_FOREACH(lp, lhp, nfsl_list) {
1028 if (!NFSBCMP(lp->nfsl_owner, ownp, NFSV4CL_LOCKNAMELEN))
1029 break;
1030 }
1031 if (lp == NULL) {
1032 NFSBCOPY(ownp, nlp->nfsl_owner, NFSV4CL_LOCKNAMELEN);
1033 if (recovery)
1034 NFSBCOPY(ropenownp, nlp->nfsl_openowner,
1035 NFSV4CL_LOCKNAMELEN);
1036 else
1037 NFSBCOPY(op->nfso_own->nfsow_owner, nlp->nfsl_openowner,
1038 NFSV4CL_LOCKNAMELEN);
1039 nlp->nfsl_seqid = 0;
1040 nlp->nfsl_defunct = 0;
1041 nlp->nfsl_inprog = NULL;
1042 nfscl_lockinit(&nlp->nfsl_rwlock);
1043 LIST_INIT(&nlp->nfsl_lock);
1044 if (donelocally) {
1045 nlp->nfsl_open = NULL;
1046 newnfsstats.cllocallockowners++;
1047 } else {
1048 nlp->nfsl_open = op;
1049 newnfsstats.cllockowners++;
1050 }
1051 LIST_INSERT_HEAD(lhp, nlp, nfsl_list);
1052 lp = nlp;
1053 nlp = NULL;
1054 *newonep = 1;
1055 }
1056
1057 /*
1058 * Now, update the byte ranges for locks.
1059 */
1060 ret = nfscl_updatelock(lp, &nlop, &otherlop, donelocally);
1061 if (!ret)
1062 donelocally = 1;
1063 if (donelocally) {
1064 *donelocallyp = 1;
1065 if (!recovery)
1066 nfscl_clrelease(clp);
1067 } else {
1068 /*
1069 * Serial modifications on the lock owner for multiple threads
1070 * for the same process using a read/write lock.
1071 */
1072 if (!recovery)
1073 nfscl_lockexcl(&lp->nfsl_rwlock, NFSCLSTATEMUTEXPTR);
1074 }
1075 if (!recovery)
1076 NFSUNLOCKCLSTATE();
1077
1078 if (nlp)
1079 FREE((caddr_t)nlp, M_NFSCLLOCKOWNER);
1080 if (nlop)
1081 FREE((caddr_t)nlop, M_NFSCLLOCK);
1082 if (otherlop)
1083 FREE((caddr_t)otherlop, M_NFSCLLOCK);
1084
1085 *lpp = lp;
1086 return (0);
1087 }
1088
1089 /*
1090 * Called to unlock a byte range, for LockU.
1091 */
1092 APPLESTATIC int
1093 nfscl_relbytelock(vnode_t vp, u_int64_t off, u_int64_t len,
1094 __unused struct ucred *cred, NFSPROC_T *p, int callcnt,
1095 struct nfsclclient *clp, void *id, int flags,
1096 struct nfscllockowner **lpp, int *dorpcp)
1097 {
1098 struct nfscllockowner *lp;
1099 struct nfsclowner *owp;
1100 struct nfsclopen *op;
1101 struct nfscllock *nlop, *other_lop = NULL;
1102 struct nfscldeleg *dp;
1103 struct nfsnode *np;
1104 u_int8_t own[NFSV4CL_LOCKNAMELEN];
1105 int ret = 0, fnd;
1106
1107 np = VTONFS(vp);
1108 *lpp = NULL;
1109 *dorpcp = 0;
1110
1111 /*
1112 * Might need these, so MALLOC them now, to
1113 * avoid a tsleep() in MALLOC later.
1114 */
1115 MALLOC(nlop, struct nfscllock *,
1116 sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK);
1117 nlop->nfslo_type = F_UNLCK;
1118 nlop->nfslo_first = off;
1119 if (len == NFS64BITSSET) {
1120 nlop->nfslo_end = NFS64BITSSET;
1121 } else {
1122 nlop->nfslo_end = off + len;
1123 if (nlop->nfslo_end <= nlop->nfslo_first) {
1124 FREE((caddr_t)nlop, M_NFSCLLOCK);
1125 return (NFSERR_INVAL);
1126 }
1127 }
1128 if (callcnt == 0) {
1129 MALLOC(other_lop, struct nfscllock *,
1130 sizeof (struct nfscllock), M_NFSCLLOCK, M_WAITOK);
1131 *other_lop = *nlop;
1132 }
1133 nfscl_filllockowner(id, own, flags);
1134 dp = NULL;
1135 NFSLOCKCLSTATE();
1136 if (callcnt == 0)
1137 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh,
1138 np->n_fhp->nfh_len);
1139
1140 /*
1141 * First, unlock any local regions on a delegation.
1142 */
1143 if (dp != NULL) {
1144 /* Look for this lockowner. */
1145 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) {
1146 if (!NFSBCMP(lp->nfsl_owner, own,
1147 NFSV4CL_LOCKNAMELEN))
1148 break;
1149 }
1150 if (lp != NULL)
1151 /* Use other_lop, so nlop is still available */
1152 (void)nfscl_updatelock(lp, &other_lop, NULL, 1);
1153 }
1154
1155 /*
1156 * Now, find a matching open/lockowner that hasn't already been done,
1157 * as marked by nfsl_inprog.
1158 */
1159 lp = NULL;
1160 fnd = 0;
1161 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
1162 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
1163 if (op->nfso_fhlen == np->n_fhp->nfh_len &&
1164 !NFSBCMP(op->nfso_fh, np->n_fhp->nfh_fh, op->nfso_fhlen)) {
1165 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) {
1166 if (lp->nfsl_inprog == NULL &&
1167 !NFSBCMP(lp->nfsl_owner, own,
1168 NFSV4CL_LOCKNAMELEN)) {
1169 fnd = 1;
1170 break;
1171 }
1172 }
1173 if (fnd)
1174 break;
1175 }
1176 }
1177 if (fnd)
1178 break;
1179 }
1180
1181 if (lp != NULL) {
1182 ret = nfscl_updatelock(lp, &nlop, NULL, 0);
1183 if (ret)
1184 *dorpcp = 1;
1185 /*
1186 * Serial modifications on the lock owner for multiple
1187 * threads for the same process using a read/write lock.
1188 */
1189 lp->nfsl_inprog = p;
1190 nfscl_lockexcl(&lp->nfsl_rwlock, NFSCLSTATEMUTEXPTR);
1191 *lpp = lp;
1192 }
1193 NFSUNLOCKCLSTATE();
1194 if (nlop)
1195 FREE((caddr_t)nlop, M_NFSCLLOCK);
1196 if (other_lop)
1197 FREE((caddr_t)other_lop, M_NFSCLLOCK);
1198 return (0);
1199 }
1200
1201 /*
1202 * Release all lockowners marked in progess for this process and file.
1203 */
1204 APPLESTATIC void
1205 nfscl_releasealllocks(struct nfsclclient *clp, vnode_t vp, NFSPROC_T *p,
1206 void *id, int flags)
1207 {
1208 struct nfsclowner *owp;
1209 struct nfsclopen *op;
1210 struct nfscllockowner *lp;
1211 struct nfsnode *np;
1212 u_int8_t own[NFSV4CL_LOCKNAMELEN];
1213
1214 np = VTONFS(vp);
1215 nfscl_filllockowner(id, own, flags);
1216 NFSLOCKCLSTATE();
1217 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
1218 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
1219 if (op->nfso_fhlen == np->n_fhp->nfh_len &&
1220 !NFSBCMP(op->nfso_fh, np->n_fhp->nfh_fh, op->nfso_fhlen)) {
1221 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) {
1222 if (lp->nfsl_inprog == p &&
1223 !NFSBCMP(lp->nfsl_owner, own,
1224 NFSV4CL_LOCKNAMELEN)) {
1225 lp->nfsl_inprog = NULL;
1226 nfscl_lockunlock(&lp->nfsl_rwlock);
1227 }
1228 }
1229 }
1230 }
1231 }
1232 nfscl_clrelease(clp);
1233 NFSUNLOCKCLSTATE();
1234 }
1235
1236 /*
1237 * Called to find out if any bytes within the byte range specified are
1238 * write locked by the calling process. Used to determine if flushing
1239 * is required before a LockU.
1240 * If in doubt, return 1, so the flush will occur.
1241 */
1242 APPLESTATIC int
1243 nfscl_checkwritelocked(vnode_t vp, struct flock *fl,
1244 struct ucred *cred, NFSPROC_T *p, void *id, int flags)
1245 {
1246 struct nfsclowner *owp;
1247 struct nfscllockowner *lp;
1248 struct nfsclopen *op;
1249 struct nfsclclient *clp;
1250 struct nfscllock *lop;
1251 struct nfscldeleg *dp;
1252 struct nfsnode *np;
1253 u_int64_t off, end;
1254 u_int8_t own[NFSV4CL_LOCKNAMELEN];
1255 int error = 0;
1256
1257 np = VTONFS(vp);
1258 switch (fl->l_whence) {
1259 case SEEK_SET:
1260 case SEEK_CUR:
1261 /*
1262 * Caller is responsible for adding any necessary offset
1263 * when SEEK_CUR is used.
1264 */
1265 off = fl->l_start;
1266 break;
1267 case SEEK_END:
1268 off = np->n_size + fl->l_start;
1269 break;
1270 default:
1271 return (1);
1272 };
1273 if (fl->l_len != 0) {
1274 end = off + fl->l_len;
1275 if (end < off)
1276 return (1);
1277 } else {
1278 end = NFS64BITSSET;
1279 }
1280
1281 error = nfscl_getcl(vp, cred, p, &clp);
1282 if (error)
1283 return (1);
1284 nfscl_filllockowner(id, own, flags);
1285 NFSLOCKCLSTATE();
1286
1287 /*
1288 * First check the delegation locks.
1289 */
1290 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
1291 if (dp != NULL) {
1292 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) {
1293 if (!NFSBCMP(lp->nfsl_owner, own,
1294 NFSV4CL_LOCKNAMELEN))
1295 break;
1296 }
1297 if (lp != NULL) {
1298 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) {
1299 if (lop->nfslo_first >= end)
1300 break;
1301 if (lop->nfslo_end <= off)
1302 continue;
1303 if (lop->nfslo_type == F_WRLCK) {
1304 nfscl_clrelease(clp);
1305 NFSUNLOCKCLSTATE();
1306 return (1);
1307 }
1308 }
1309 }
1310 }
1311
1312 /*
1313 * Now, check state against the server.
1314 */
1315 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
1316 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
1317 if (op->nfso_fhlen == np->n_fhp->nfh_len &&
1318 !NFSBCMP(op->nfso_fh, np->n_fhp->nfh_fh, op->nfso_fhlen)) {
1319 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) {
1320 if (!NFSBCMP(lp->nfsl_owner, own,
1321 NFSV4CL_LOCKNAMELEN))
1322 break;
1323 }
1324 if (lp != NULL) {
1325 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) {
1326 if (lop->nfslo_first >= end)
1327 break;
1328 if (lop->nfslo_end <= off)
1329 continue;
1330 if (lop->nfslo_type == F_WRLCK) {
1331 nfscl_clrelease(clp);
1332 NFSUNLOCKCLSTATE();
1333 return (1);
1334 }
1335 }
1336 }
1337 }
1338 }
1339 }
1340 nfscl_clrelease(clp);
1341 NFSUNLOCKCLSTATE();
1342 return (0);
1343 }
1344
1345 /*
1346 * Release a byte range lock owner structure.
1347 */
1348 APPLESTATIC void
1349 nfscl_lockrelease(struct nfscllockowner *lp, int error, int candelete)
1350 {
1351 struct nfsclclient *clp;
1352
1353 if (lp == NULL)
1354 return;
1355 NFSLOCKCLSTATE();
1356 clp = lp->nfsl_open->nfso_own->nfsow_clp;
1357 if (error != 0 && candelete &&
1358 (lp->nfsl_rwlock.nfslock_lock & NFSV4LOCK_WANTED) == 0)
1359 nfscl_freelockowner(lp, 0);
1360 else
1361 nfscl_lockunlock(&lp->nfsl_rwlock);
1362 nfscl_clrelease(clp);
1363 NFSUNLOCKCLSTATE();
1364 }
1365
1366 /*
1367 * Free up an open structure and any associated byte range lock structures.
1368 */
1369 APPLESTATIC void
1370 nfscl_freeopen(struct nfsclopen *op, int local)
1371 {
1372
1373 LIST_REMOVE(op, nfso_list);
1374 nfscl_freealllocks(&op->nfso_lock, local);
1375 FREE((caddr_t)op, M_NFSCLOPEN);
1376 if (local)
1377 newnfsstats.cllocalopens--;
1378 else
1379 newnfsstats.clopens--;
1380 }
1381
1382 /*
1383 * Free up all lock owners and associated locks.
1384 */
1385 static void
1386 nfscl_freealllocks(struct nfscllockownerhead *lhp, int local)
1387 {
1388 struct nfscllockowner *lp, *nlp;
1389
1390 LIST_FOREACH_SAFE(lp, lhp, nfsl_list, nlp) {
1391 if ((lp->nfsl_rwlock.nfslock_lock & NFSV4LOCK_WANTED))
1392 panic("nfscllckw");
1393 nfscl_freelockowner(lp, local);
1394 }
1395 }
1396
1397 /*
1398 * Called for an Open when NFSERR_EXPIRED is received from the server.
1399 * If there are no byte range locks nor a Share Deny lost, try to do a
1400 * fresh Open. Otherwise, free the open.
1401 */
1402 static int
1403 nfscl_expireopen(struct nfsclclient *clp, struct nfsclopen *op,
1404 struct nfsmount *nmp, struct ucred *cred, NFSPROC_T *p)
1405 {
1406 struct nfscllockowner *lp;
1407 struct nfscldeleg *dp;
1408 int mustdelete = 0, error;
1409
1410 /*
1411 * Look for any byte range lock(s).
1412 */
1413 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) {
1414 if (!LIST_EMPTY(&lp->nfsl_lock)) {
1415 mustdelete = 1;
1416 break;
1417 }
1418 }
1419
1420 /*
1421 * If no byte range lock(s) nor a Share deny, try to re-open.
1422 */
1423 if (!mustdelete && (op->nfso_mode & NFSLCK_DENYBITS) == 0) {
1424 newnfs_copycred(&op->nfso_cred, cred);
1425 dp = NULL;
1426 error = nfsrpc_reopen(nmp, op->nfso_fh,
1427 op->nfso_fhlen, op->nfso_mode, op, &dp, cred, p);
1428 if (error) {
1429 mustdelete = 1;
1430 if (dp != NULL) {
1431 FREE((caddr_t)dp, M_NFSCLDELEG);
1432 dp = NULL;
1433 }
1434 }
1435 if (dp != NULL)
1436 nfscl_deleg(nmp->nm_mountp, clp, op->nfso_fh,
1437 op->nfso_fhlen, cred, p, &dp);
1438 }
1439
1440 /*
1441 * If a byte range lock or Share deny or couldn't re-open, free it.
1442 */
1443 if (mustdelete)
1444 nfscl_freeopen(op, 0);
1445 return (mustdelete);
1446 }
1447
1448 /*
1449 * Free up an open owner structure.
1450 */
1451 static void
1452 nfscl_freeopenowner(struct nfsclowner *owp, int local)
1453 {
1454
1455 LIST_REMOVE(owp, nfsow_list);
1456 FREE((caddr_t)owp, M_NFSCLOWNER);
1457 if (local)
1458 newnfsstats.cllocalopenowners--;
1459 else
1460 newnfsstats.clopenowners--;
1461 }
1462
1463 /*
1464 * Free up a byte range lock owner structure.
1465 */
1466 APPLESTATIC void
1467 nfscl_freelockowner(struct nfscllockowner *lp, int local)
1468 {
1469 struct nfscllock *lop, *nlop;
1470
1471 LIST_REMOVE(lp, nfsl_list);
1472 LIST_FOREACH_SAFE(lop, &lp->nfsl_lock, nfslo_list, nlop) {
1473 nfscl_freelock(lop, local);
1474 }
1475 FREE((caddr_t)lp, M_NFSCLLOCKOWNER);
1476 if (local)
1477 newnfsstats.cllocallockowners--;
1478 else
1479 newnfsstats.cllockowners--;
1480 }
1481
1482 /*
1483 * Free up a byte range lock structure.
1484 */
1485 APPLESTATIC void
1486 nfscl_freelock(struct nfscllock *lop, int local)
1487 {
1488
1489 LIST_REMOVE(lop, nfslo_list);
1490 FREE((caddr_t)lop, M_NFSCLLOCK);
1491 if (local)
1492 newnfsstats.cllocallocks--;
1493 else
1494 newnfsstats.cllocks--;
1495 }
1496
1497 /*
1498 * Clean out the state related to a delegation.
1499 */
1500 static void
1501 nfscl_cleandeleg(struct nfscldeleg *dp)
1502 {
1503 struct nfsclowner *owp, *nowp;
1504 struct nfsclopen *op;
1505
1506 LIST_FOREACH_SAFE(owp, &dp->nfsdl_owner, nfsow_list, nowp) {
1507 op = LIST_FIRST(&owp->nfsow_open);
1508 if (op != NULL) {
1509 if (LIST_NEXT(op, nfso_list) != NULL)
1510 panic("nfscleandel");
1511 nfscl_freeopen(op, 1);
1512 }
1513 nfscl_freeopenowner(owp, 1);
1514 }
1515 nfscl_freealllocks(&dp->nfsdl_lock, 1);
1516 }
1517
1518 /*
1519 * Free a delegation.
1520 */
1521 static void
1522 nfscl_freedeleg(struct nfscldeleghead *hdp, struct nfscldeleg *dp)
1523 {
1524
1525 TAILQ_REMOVE(hdp, dp, nfsdl_list);
1526 LIST_REMOVE(dp, nfsdl_hash);
1527 FREE((caddr_t)dp, M_NFSCLDELEG);
1528 newnfsstats.cldelegates--;
1529 nfscl_delegcnt--;
1530 }
1531
1532 /*
1533 * Free up all state related to this client structure.
1534 */
1535 static void
1536 nfscl_cleanclient(struct nfsclclient *clp)
1537 {
1538 struct nfsclowner *owp, *nowp;
1539 struct nfsclopen *op, *nop;
1540 struct nfscllockowner *lp, *nlp;
1541
1542
1543 /* get rid of defunct lockowners */
1544 LIST_FOREACH_SAFE(lp, &clp->nfsc_defunctlockowner, nfsl_list, nlp) {
1545 nfscl_freelockowner(lp, 0);
1546 }
1547
1548 /* Now, all the OpenOwners, etc. */
1549 LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) {
1550 LIST_FOREACH_SAFE(op, &owp->nfsow_open, nfso_list, nop) {
1551 nfscl_freeopen(op, 0);
1552 }
1553 nfscl_freeopenowner(owp, 0);
1554 }
1555 }
1556
1557 /*
1558 * Called when an NFSERR_EXPIRED is received from the server.
1559 */
1560 static void
1561 nfscl_expireclient(struct nfsclclient *clp, struct nfsmount *nmp,
1562 struct ucred *cred, NFSPROC_T *p)
1563 {
1564 struct nfsclowner *owp, *nowp, *towp;
1565 struct nfsclopen *op, *nop, *top;
1566 struct nfscldeleg *dp, *ndp;
1567 int ret, printed = 0;
1568
1569 /*
1570 * First, merge locally issued Opens into the list for the server.
1571 */
1572 dp = TAILQ_FIRST(&clp->nfsc_deleg);
1573 while (dp != NULL) {
1574 ndp = TAILQ_NEXT(dp, nfsdl_list);
1575 owp = LIST_FIRST(&dp->nfsdl_owner);
1576 while (owp != NULL) {
1577 nowp = LIST_NEXT(owp, nfsow_list);
1578 op = LIST_FIRST(&owp->nfsow_open);
1579 if (op != NULL) {
1580 if (LIST_NEXT(op, nfso_list) != NULL)
1581 panic("nfsclexp");
1582 LIST_FOREACH(towp, &clp->nfsc_owner, nfsow_list) {
1583 if (!NFSBCMP(towp->nfsow_owner, owp->nfsow_owner,
1584 NFSV4CL_LOCKNAMELEN))
1585 break;
1586 }
1587 if (towp != NULL) {
1588 /* Merge opens in */
1589 LIST_FOREACH(top, &towp->nfsow_open, nfso_list) {
1590 if (top->nfso_fhlen == op->nfso_fhlen &&
1591 !NFSBCMP(top->nfso_fh, op->nfso_fh,
1592 op->nfso_fhlen)) {
1593 top->nfso_mode |= op->nfso_mode;
1594 top->nfso_opencnt += op->nfso_opencnt;
1595 break;
1596 }
1597 }
1598 if (top == NULL) {
1599 /* Just add the open to the owner list */
1600 LIST_REMOVE(op, nfso_list);
1601 op->nfso_own = towp;
1602 LIST_INSERT_HEAD(&towp->nfsow_open, op, nfso_list);
1603 newnfsstats.cllocalopens--;
1604 newnfsstats.clopens++;
1605 }
1606 } else {
1607 /* Just add the openowner to the client list */
1608 LIST_REMOVE(owp, nfsow_list);
1609 owp->nfsow_clp = clp;
1610 LIST_INSERT_HEAD(&clp->nfsc_owner, owp, nfsow_list);
1611 newnfsstats.cllocalopenowners--;
1612 newnfsstats.clopenowners++;
1613 newnfsstats.cllocalopens--;
1614 newnfsstats.clopens++;
1615 }
1616 }
1617 owp = nowp;
1618 }
1619 if (!printed && !LIST_EMPTY(&dp->nfsdl_lock)) {
1620 printed = 1;
1621 printf("nfsv4 expired locks lost\n");
1622 }
1623 nfscl_cleandeleg(dp);
1624 nfscl_freedeleg(&clp->nfsc_deleg, dp);
1625 dp = ndp;
1626 }
1627 if (!TAILQ_EMPTY(&clp->nfsc_deleg))
1628 panic("nfsclexp");
1629
1630 /*
1631 * Now, try and reopen against the server.
1632 */
1633 LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) {
1634 owp->nfsow_seqid = 0;
1635 LIST_FOREACH_SAFE(op, &owp->nfsow_open, nfso_list, nop) {
1636 ret = nfscl_expireopen(clp, op, nmp, cred, p);
1637 if (ret && !printed) {
1638 printed = 1;
1639 printf("nfsv4 expired locks lost\n");
1640 }
1641 }
1642 if (LIST_EMPTY(&owp->nfsow_open))
1643 nfscl_freeopenowner(owp, 0);
1644 }
1645 }
1646
1647 #ifndef __FreeBSD__
1648 /*
1649 * Called from exit() upon process termination.
1650 */
1651 APPLESTATIC void
1652 nfscl_cleanup(NFSPROC_T *p)
1653 {
1654 struct nfsclclient *clp;
1655 u_int8_t own[NFSV4CL_LOCKNAMELEN];
1656
1657 if (!nfscl_inited)
1658 return;
1659 nfscl_filllockowner(p->td_proc, own, F_POSIX);
1660
1661 NFSLOCKCLSTATE();
1662 /*
1663 * Loop through all the clientids, looking for the OpenOwners.
1664 */
1665 LIST_FOREACH(clp, &nfsclhead, nfsc_list)
1666 nfscl_cleanup_common(clp, own);
1667 NFSUNLOCKCLSTATE();
1668 }
1669 #endif /* !__FreeBSD__ */
1670
1671 /*
1672 * Common code used by nfscl_cleanup() and nfscl_cleanupkext().
1673 * Must be called with CLSTATE lock held.
1674 */
1675 static void
1676 nfscl_cleanup_common(struct nfsclclient *clp, u_int8_t *own)
1677 {
1678 struct nfsclowner *owp, *nowp;
1679 struct nfsclopen *op;
1680 struct nfscllockowner *lp, *nlp;
1681 struct nfscldeleg *dp;
1682
1683 /* First, get rid of local locks on delegations. */
1684 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) {
1685 LIST_FOREACH_SAFE(lp, &dp->nfsdl_lock, nfsl_list, nlp) {
1686 if (!NFSBCMP(lp->nfsl_owner, own, NFSV4CL_LOCKNAMELEN)) {
1687 if ((lp->nfsl_rwlock.nfslock_lock & NFSV4LOCK_WANTED))
1688 panic("nfscllckw");
1689 nfscl_freelockowner(lp, 1);
1690 }
1691 }
1692 }
1693 owp = LIST_FIRST(&clp->nfsc_owner);
1694 while (owp != NULL) {
1695 nowp = LIST_NEXT(owp, nfsow_list);
1696 if (!NFSBCMP(owp->nfsow_owner, own,
1697 NFSV4CL_LOCKNAMELEN)) {
1698 /*
1699 * If there are children that haven't closed the
1700 * file descriptors yet, the opens will still be
1701 * here. For that case, let the renew thread clear
1702 * out the OpenOwner later.
1703 */
1704 if (LIST_EMPTY(&owp->nfsow_open))
1705 nfscl_freeopenowner(owp, 0);
1706 else
1707 owp->nfsow_defunct = 1;
1708 } else {
1709 /* look for lockowners on other opens */
1710 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
1711 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) {
1712 if (!NFSBCMP(lp->nfsl_owner, own,
1713 NFSV4CL_LOCKNAMELEN))
1714 lp->nfsl_defunct = 1;
1715 }
1716 }
1717 }
1718 owp = nowp;
1719 }
1720
1721 /* and check the defunct list */
1722 LIST_FOREACH(lp, &clp->nfsc_defunctlockowner, nfsl_list) {
1723 if (!NFSBCMP(lp->nfsl_owner, own, NFSV4CL_LOCKNAMELEN))
1724 lp->nfsl_defunct = 1;
1725 }
1726 }
1727
1728 #if defined(APPLEKEXT) || defined(__FreeBSD__)
1729 /*
1730 * Simulate the call nfscl_cleanup() by looking for open owners associated
1731 * with processes that no longer exist, since a call to nfscl_cleanup()
1732 * can't be patched into exit().
1733 */
1734 static void
1735 nfscl_cleanupkext(struct nfsclclient *clp)
1736 {
1737 struct nfsclowner *owp, *nowp;
1738 struct nfscllockowner *lp;
1739
1740 NFSPROCLISTLOCK();
1741 NFSLOCKCLSTATE();
1742 LIST_FOREACH_SAFE(owp, &clp->nfsc_owner, nfsow_list, nowp) {
1743 if (nfscl_procdoesntexist(owp->nfsow_owner))
1744 nfscl_cleanup_common(clp, owp->nfsow_owner);
1745 }
1746
1747 /* and check the defunct list */
1748 LIST_FOREACH(lp, &clp->nfsc_defunctlockowner, nfsl_list) {
1749 if (nfscl_procdoesntexist(lp->nfsl_owner))
1750 lp->nfsl_defunct = 1;
1751 }
1752 NFSUNLOCKCLSTATE();
1753 NFSPROCLISTUNLOCK();
1754 }
1755 #endif /* APPLEKEXT || __FreeBSD__ */
1756
1757 static int fake_global; /* Used to force visibility of MNTK_UNMOUNTF */
1758 /*
1759 * Called from nfs umount to free up the clientid.
1760 */
1761 APPLESTATIC void
1762 nfscl_umount(struct nfsmount *nmp, NFSPROC_T *p)
1763 {
1764 struct nfsclclient *clp;
1765 struct ucred *cred;
1766 int igotlock;
1767
1768 /*
1769 * For the case that matters, this is the thread that set
1770 * MNTK_UNMOUNTF, so it will see it set. The code that follows is
1771 * done to ensure that any thread executing nfscl_getcl() after
1772 * this time, will see MNTK_UNMOUNTF set. nfscl_getcl() uses the
1773 * mutex for NFSLOCKCLSTATE(), so it is "m" for the following
1774 * explanation, courtesy of Alan Cox.
1775 * What follows is a snippet from Alan Cox's email at:
1776 * http://docs.FreeBSD.org/cgi/
1777 * mid.cgi?BANLkTikR3d65zPHo9==08ZfJ2vmqZucEvw
1778 *
1779 * 1. Set MNTK_UNMOUNTF
1780 * 2. Acquire a standard FreeBSD mutex "m".
1781 * 3. Update some data structures.
1782 * 4. Release mutex "m".
1783 *
1784 * Then, other threads that acquire "m" after step 4 has occurred will
1785 * see MNTK_UNMOUNTF as set. But, other threads that beat thread X to
1786 * step 2 may or may not see MNTK_UNMOUNTF as set.
1787 */
1788 NFSLOCKCLSTATE();
1789 if ((nmp->nm_mountp->mnt_kern_flag & MNTK_UNMOUNTF) != 0) {
1790 fake_global++;
1791 NFSUNLOCKCLSTATE();
1792 NFSLOCKCLSTATE();
1793 }
1794
1795 clp = nmp->nm_clp;
1796 if (clp != NULL) {
1797 if ((clp->nfsc_flags & NFSCLFLAGS_INITED) == 0)
1798 panic("nfscl umount");
1799
1800 /*
1801 * First, handshake with the nfscl renew thread, to terminate
1802 * it.
1803 */
1804 clp->nfsc_flags |= NFSCLFLAGS_UMOUNT;
1805 while (clp->nfsc_flags & NFSCLFLAGS_HASTHREAD)
1806 (void)mtx_sleep(clp, NFSCLSTATEMUTEXPTR, PWAIT,
1807 "nfsclumnt", hz);
1808
1809 /*
1810 * Now, get the exclusive lock on the client state, so
1811 * that no uses of the state are still in progress.
1812 */
1813 do {
1814 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL,
1815 NFSCLSTATEMUTEXPTR, NULL);
1816 } while (!igotlock);
1817 NFSUNLOCKCLSTATE();
1818
1819 /*
1820 * Free up all the state. It will expire on the server, but
1821 * maybe we should do a SetClientId/SetClientIdConfirm so
1822 * the server throws it away?
1823 */
1824 LIST_REMOVE(clp, nfsc_list);
1825 nfscl_delegreturnall(clp, p);
1826 cred = newnfs_getcred();
1827 (void) nfsrpc_setclient(nmp, clp, cred, p);
1828 nfscl_cleanclient(clp);
1829 nmp->nm_clp = NULL;
1830 NFSFREECRED(cred);
1831 FREE((caddr_t)clp, M_NFSCLCLIENT);
1832 } else
1833 NFSUNLOCKCLSTATE();
1834 }
1835
1836 /*
1837 * This function is called when a server replies with NFSERR_STALECLIENTID
1838 * or NFSERR_STALESTATEID. It traverses the clientid lists, doing Opens
1839 * and Locks with reclaim. If these fail, it deletes the corresponding state.
1840 */
1841 static void
1842 nfscl_recover(struct nfsclclient *clp, struct ucred *cred, NFSPROC_T *p)
1843 {
1844 struct nfsclowner *owp, *nowp;
1845 struct nfsclopen *op, *nop;
1846 struct nfscllockowner *lp, *nlp;
1847 struct nfscllock *lop, *nlop;
1848 struct nfscldeleg *dp, *ndp, *tdp;
1849 struct nfsmount *nmp;
1850 struct ucred *tcred;
1851 struct nfsclopenhead extra_open;
1852 struct nfscldeleghead extra_deleg;
1853 struct nfsreq *rep;
1854 u_int64_t len;
1855 u_int32_t delegtype = NFSV4OPEN_DELEGATEWRITE, mode;
1856 int igotlock = 0, error, trycnt, firstlock, s;
1857
1858 /*
1859 * First, lock the client structure, so everyone else will
1860 * block when trying to use state.
1861 */
1862 NFSLOCKCLSTATE();
1863 clp->nfsc_flags |= NFSCLFLAGS_RECVRINPROG;
1864 do {
1865 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL,
1866 NFSCLSTATEMUTEXPTR, NULL);
1867 } while (!igotlock);
1868 NFSUNLOCKCLSTATE();
1869
1870 nmp = clp->nfsc_nmp;
1871 if (nmp == NULL)
1872 panic("nfscl recover");
1873 trycnt = 5;
1874 do {
1875 error = nfsrpc_setclient(nmp, clp, cred, p);
1876 } while ((error == NFSERR_STALECLIENTID ||
1877 error == NFSERR_STALEDONTRECOVER) && --trycnt > 0);
1878 if (error) {
1879 nfscl_cleanclient(clp);
1880 NFSLOCKCLSTATE();
1881 clp->nfsc_flags &= ~(NFSCLFLAGS_HASCLIENTID |
1882 NFSCLFLAGS_RECOVER | NFSCLFLAGS_RECVRINPROG);
1883 wakeup(&clp->nfsc_flags);
1884 nfsv4_unlock(&clp->nfsc_lock, 0);
1885 NFSUNLOCKCLSTATE();
1886 return;
1887 }
1888 clp->nfsc_flags |= NFSCLFLAGS_HASCLIENTID;
1889 clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER;
1890
1891 /*
1892 * Mark requests already queued on the server, so that they don't
1893 * initiate another recovery cycle. Any requests already in the
1894 * queue that handle state information will have the old stale
1895 * clientid/stateid and will get a NFSERR_STALESTATEID or
1896 * NFSERR_STALECLIENTID reply from the server. This will be
1897 * translated to NFSERR_STALEDONTRECOVER when R_DONTRECOVER is set.
1898 */
1899 s = splsoftclock();
1900 NFSLOCKREQ();
1901 TAILQ_FOREACH(rep, &nfsd_reqq, r_chain) {
1902 if (rep->r_nmp == nmp)
1903 rep->r_flags |= R_DONTRECOVER;
1904 }
1905 NFSUNLOCKREQ();
1906 splx(s);
1907
1908 /* get rid of defunct lockowners */
1909 LIST_FOREACH_SAFE(lp, &clp->nfsc_defunctlockowner, nfsl_list, nlp) {
1910 nfscl_freelockowner(lp, 0);
1911 }
1912
1913 /*
1914 * Now, mark all delegations "need reclaim".
1915 */
1916 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list)
1917 dp->nfsdl_flags |= NFSCLDL_NEEDRECLAIM;
1918
1919 TAILQ_INIT(&extra_deleg);
1920 LIST_INIT(&extra_open);
1921 /*
1922 * Now traverse the state lists, doing Open and Lock Reclaims.
1923 */
1924 tcred = newnfs_getcred();
1925 owp = LIST_FIRST(&clp->nfsc_owner);
1926 while (owp != NULL) {
1927 nowp = LIST_NEXT(owp, nfsow_list);
1928 owp->nfsow_seqid = 0;
1929 op = LIST_FIRST(&owp->nfsow_open);
1930 while (op != NULL) {
1931 nop = LIST_NEXT(op, nfso_list);
1932 if (error != NFSERR_NOGRACE) {
1933 /* Search for a delegation to reclaim with the open */
1934 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) {
1935 if (!(dp->nfsdl_flags & NFSCLDL_NEEDRECLAIM))
1936 continue;
1937 if ((dp->nfsdl_flags & NFSCLDL_WRITE)) {
1938 mode = NFSV4OPEN_ACCESSWRITE;
1939 delegtype = NFSV4OPEN_DELEGATEWRITE;
1940 } else {
1941 mode = NFSV4OPEN_ACCESSREAD;
1942 delegtype = NFSV4OPEN_DELEGATEREAD;
1943 }
1944 if ((op->nfso_mode & mode) == mode &&
1945 op->nfso_fhlen == dp->nfsdl_fhlen &&
1946 !NFSBCMP(op->nfso_fh, dp->nfsdl_fh, op->nfso_fhlen))
1947 break;
1948 }
1949 ndp = dp;
1950 if (dp == NULL)
1951 delegtype = NFSV4OPEN_DELEGATENONE;
1952 newnfs_copycred(&op->nfso_cred, tcred);
1953 error = nfscl_tryopen(nmp, NULL, op->nfso_fh,
1954 op->nfso_fhlen, op->nfso_fh, op->nfso_fhlen,
1955 op->nfso_mode, op, NULL, 0, &ndp, 1, delegtype,
1956 tcred, p);
1957 if (!error) {
1958 /* Handle any replied delegation */
1959 if (ndp != NULL && ((ndp->nfsdl_flags & NFSCLDL_WRITE)
1960 || NFSMNT_RDONLY(nmp->nm_mountp))) {
1961 if ((ndp->nfsdl_flags & NFSCLDL_WRITE))
1962 mode = NFSV4OPEN_ACCESSWRITE;
1963 else
1964 mode = NFSV4OPEN_ACCESSREAD;
1965 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) {
1966 if (!(dp->nfsdl_flags & NFSCLDL_NEEDRECLAIM))
1967 continue;
1968 if ((op->nfso_mode & mode) == mode &&
1969 op->nfso_fhlen == dp->nfsdl_fhlen &&
1970 !NFSBCMP(op->nfso_fh, dp->nfsdl_fh,
1971 op->nfso_fhlen)) {
1972 dp->nfsdl_stateid = ndp->nfsdl_stateid;
1973 dp->nfsdl_sizelimit = ndp->nfsdl_sizelimit;
1974 dp->nfsdl_ace = ndp->nfsdl_ace;
1975 dp->nfsdl_change = ndp->nfsdl_change;
1976 dp->nfsdl_flags &= ~NFSCLDL_NEEDRECLAIM;
1977 if ((ndp->nfsdl_flags & NFSCLDL_RECALL))
1978 dp->nfsdl_flags |= NFSCLDL_RECALL;
1979 FREE((caddr_t)ndp, M_NFSCLDELEG);
1980 ndp = NULL;
1981 break;
1982 }
1983 }
1984 }
1985 if (ndp != NULL)
1986 TAILQ_INSERT_HEAD(&extra_deleg, ndp, nfsdl_list);
1987
1988 /* and reclaim all byte range locks */
1989 lp = LIST_FIRST(&op->nfso_lock);
1990 while (lp != NULL) {
1991 nlp = LIST_NEXT(lp, nfsl_list);
1992 lp->nfsl_seqid = 0;
1993 firstlock = 1;
1994 lop = LIST_FIRST(&lp->nfsl_lock);
1995 while (lop != NULL) {
1996 nlop = LIST_NEXT(lop, nfslo_list);
1997 if (lop->nfslo_end == NFS64BITSSET)
1998 len = NFS64BITSSET;
1999 else
2000 len = lop->nfslo_end - lop->nfslo_first;
2001 if (error != NFSERR_NOGRACE)
2002 error = nfscl_trylock(nmp, NULL,
2003 op->nfso_fh, op->nfso_fhlen, lp,
2004 firstlock, 1, lop->nfslo_first, len,
2005 lop->nfslo_type, tcred, p);
2006 if (error != 0)
2007 nfscl_freelock(lop, 0);
2008 else
2009 firstlock = 0;
2010 lop = nlop;
2011 }
2012 /* If no locks, but a lockowner, just delete it. */
2013 if (LIST_EMPTY(&lp->nfsl_lock))
2014 nfscl_freelockowner(lp, 0);
2015 lp = nlp;
2016 }
2017 } else {
2018 nfscl_freeopen(op, 0);
2019 }
2020 }
2021 op = nop;
2022 }
2023 owp = nowp;
2024 }
2025
2026 /*
2027 * Now, try and get any delegations not yet reclaimed by cobbling
2028 * to-gether an appropriate open.
2029 */
2030 nowp = NULL;
2031 dp = TAILQ_FIRST(&clp->nfsc_deleg);
2032 while (dp != NULL) {
2033 ndp = TAILQ_NEXT(dp, nfsdl_list);
2034 if ((dp->nfsdl_flags & NFSCLDL_NEEDRECLAIM)) {
2035 if (nowp == NULL) {
2036 MALLOC(nowp, struct nfsclowner *,
2037 sizeof (struct nfsclowner), M_NFSCLOWNER, M_WAITOK);
2038 /*
2039 * Name must be as long an largest possible
2040 * NFSV4CL_LOCKNAMELEN. 12 for now.
2041 */
2042 NFSBCOPY("RECLAIMDELEG", nowp->nfsow_owner,
2043 NFSV4CL_LOCKNAMELEN);
2044 LIST_INIT(&nowp->nfsow_open);
2045 nowp->nfsow_clp = clp;
2046 nowp->nfsow_seqid = 0;
2047 nowp->nfsow_defunct = 0;
2048 nfscl_lockinit(&nowp->nfsow_rwlock);
2049 }
2050 nop = NULL;
2051 if (error != NFSERR_NOGRACE) {
2052 MALLOC(nop, struct nfsclopen *, sizeof (struct nfsclopen) +
2053 dp->nfsdl_fhlen - 1, M_NFSCLOPEN, M_WAITOK);
2054 nop->nfso_own = nowp;
2055 if ((dp->nfsdl_flags & NFSCLDL_WRITE)) {
2056 nop->nfso_mode = NFSV4OPEN_ACCESSWRITE;
2057 delegtype = NFSV4OPEN_DELEGATEWRITE;
2058 } else {
2059 nop->nfso_mode = NFSV4OPEN_ACCESSREAD;
2060 delegtype = NFSV4OPEN_DELEGATEREAD;
2061 }
2062 nop->nfso_opencnt = 0;
2063 nop->nfso_posixlock = 1;
2064 nop->nfso_fhlen = dp->nfsdl_fhlen;
2065 NFSBCOPY(dp->nfsdl_fh, nop->nfso_fh, dp->nfsdl_fhlen);
2066 LIST_INIT(&nop->nfso_lock);
2067 nop->nfso_stateid.seqid = 0;
2068 nop->nfso_stateid.other[0] = 0;
2069 nop->nfso_stateid.other[1] = 0;
2070 nop->nfso_stateid.other[2] = 0;
2071 newnfs_copycred(&dp->nfsdl_cred, tcred);
2072 newnfs_copyincred(tcred, &nop->nfso_cred);
2073 tdp = NULL;
2074 error = nfscl_tryopen(nmp, NULL, nop->nfso_fh,
2075 nop->nfso_fhlen, nop->nfso_fh, nop->nfso_fhlen,
2076 nop->nfso_mode, nop, NULL, 0, &tdp, 1,
2077 delegtype, tcred, p);
2078 if (tdp != NULL) {
2079 if ((tdp->nfsdl_flags & NFSCLDL_WRITE))
2080 mode = NFSV4OPEN_ACCESSWRITE;
2081 else
2082 mode = NFSV4OPEN_ACCESSREAD;
2083 if ((nop->nfso_mode & mode) == mode &&
2084 nop->nfso_fhlen == tdp->nfsdl_fhlen &&
2085 !NFSBCMP(nop->nfso_fh, tdp->nfsdl_fh,
2086 nop->nfso_fhlen)) {
2087 dp->nfsdl_stateid = tdp->nfsdl_stateid;
2088 dp->nfsdl_sizelimit = tdp->nfsdl_sizelimit;
2089 dp->nfsdl_ace = tdp->nfsdl_ace;
2090 dp->nfsdl_change = tdp->nfsdl_change;
2091 dp->nfsdl_flags &= ~NFSCLDL_NEEDRECLAIM;
2092 if ((tdp->nfsdl_flags & NFSCLDL_RECALL))
2093 dp->nfsdl_flags |= NFSCLDL_RECALL;
2094 FREE((caddr_t)tdp, M_NFSCLDELEG);
2095 } else {
2096 TAILQ_INSERT_HEAD(&extra_deleg, tdp, nfsdl_list);
2097 }
2098 }
2099 }
2100 if (error) {
2101 if (nop != NULL)
2102 FREE((caddr_t)nop, M_NFSCLOPEN);
2103 /*
2104 * Couldn't reclaim it, so throw the state
2105 * away. Ouch!!
2106 */
2107 nfscl_cleandeleg(dp);
2108 nfscl_freedeleg(&clp->nfsc_deleg, dp);
2109 } else {
2110 LIST_INSERT_HEAD(&extra_open, nop, nfso_list);
2111 }
2112 }
2113 dp = ndp;
2114 }
2115
2116 /*
2117 * Now, get rid of extra Opens and Delegations.
2118 */
2119 LIST_FOREACH_SAFE(op, &extra_open, nfso_list, nop) {
2120 do {
2121 newnfs_copycred(&op->nfso_cred, tcred);
2122 error = nfscl_tryclose(op, tcred, nmp, p);
2123 if (error == NFSERR_GRACE)
2124 (void) nfs_catnap(PZERO, error, "nfsexcls");
2125 } while (error == NFSERR_GRACE);
2126 LIST_REMOVE(op, nfso_list);
2127 FREE((caddr_t)op, M_NFSCLOPEN);
2128 }
2129 if (nowp != NULL)
2130 FREE((caddr_t)nowp, M_NFSCLOWNER);
2131
2132 TAILQ_FOREACH_SAFE(dp, &extra_deleg, nfsdl_list, ndp) {
2133 do {
2134 newnfs_copycred(&dp->nfsdl_cred, tcred);
2135 error = nfscl_trydelegreturn(dp, tcred, nmp, p);
2136 if (error == NFSERR_GRACE)
2137 (void) nfs_catnap(PZERO, error, "nfsexdlg");
2138 } while (error == NFSERR_GRACE);
2139 TAILQ_REMOVE(&extra_deleg, dp, nfsdl_list);
2140 FREE((caddr_t)dp, M_NFSCLDELEG);
2141 }
2142
2143 NFSLOCKCLSTATE();
2144 clp->nfsc_flags &= ~NFSCLFLAGS_RECVRINPROG;
2145 wakeup(&clp->nfsc_flags);
2146 nfsv4_unlock(&clp->nfsc_lock, 0);
2147 NFSUNLOCKCLSTATE();
2148 NFSFREECRED(tcred);
2149 }
2150
2151 /*
2152 * This function is called when a server replies with NFSERR_EXPIRED.
2153 * It deletes all state for the client and does a fresh SetClientId/confirm.
2154 * XXX Someday it should post a signal to the process(es) that hold the
2155 * state, so they know that lock state has been lost.
2156 */
2157 APPLESTATIC int
2158 nfscl_hasexpired(struct nfsclclient *clp, u_int32_t clidrev, NFSPROC_T *p)
2159 {
2160 struct nfscllockowner *lp, *nlp;
2161 struct nfsmount *nmp;
2162 struct ucred *cred;
2163 int igotlock = 0, error, trycnt;
2164
2165 /*
2166 * If the clientid has gone away or a new SetClientid has already
2167 * been done, just return ok.
2168 */
2169 if (clp == NULL || clidrev != clp->nfsc_clientidrev)
2170 return (0);
2171
2172 /*
2173 * First, lock the client structure, so everyone else will
2174 * block when trying to use state. Also, use NFSCLFLAGS_EXPIREIT so
2175 * that only one thread does the work.
2176 */
2177 NFSLOCKCLSTATE();
2178 clp->nfsc_flags |= NFSCLFLAGS_EXPIREIT;
2179 do {
2180 igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL,
2181 NFSCLSTATEMUTEXPTR, NULL);
2182 } while (!igotlock && (clp->nfsc_flags & NFSCLFLAGS_EXPIREIT));
2183 if ((clp->nfsc_flags & NFSCLFLAGS_EXPIREIT) == 0) {
2184 if (igotlock)
2185 nfsv4_unlock(&clp->nfsc_lock, 0);
2186 NFSUNLOCKCLSTATE();
2187 return (0);
2188 }
2189 clp->nfsc_flags |= NFSCLFLAGS_RECVRINPROG;
2190 NFSUNLOCKCLSTATE();
2191
2192 nmp = clp->nfsc_nmp;
2193 if (nmp == NULL)
2194 panic("nfscl expired");
2195 cred = newnfs_getcred();
2196 trycnt = 5;
2197 do {
2198 error = nfsrpc_setclient(nmp, clp, cred, p);
2199 } while ((error == NFSERR_STALECLIENTID ||
2200 error == NFSERR_STALEDONTRECOVER) && --trycnt > 0);
2201 if (error) {
2202 /*
2203 * Clear out any state.
2204 */
2205 nfscl_cleanclient(clp);
2206 NFSLOCKCLSTATE();
2207 clp->nfsc_flags &= ~(NFSCLFLAGS_HASCLIENTID |
2208 NFSCLFLAGS_RECOVER);
2209 } else {
2210 /* get rid of defunct lockowners */
2211 LIST_FOREACH_SAFE(lp, &clp->nfsc_defunctlockowner, nfsl_list,
2212 nlp) {
2213 nfscl_freelockowner(lp, 0);
2214 }
2215
2216 /*
2217 * Expire the state for the client.
2218 */
2219 nfscl_expireclient(clp, nmp, cred, p);
2220 NFSLOCKCLSTATE();
2221 clp->nfsc_flags |= NFSCLFLAGS_HASCLIENTID;
2222 clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER;
2223 }
2224 clp->nfsc_flags &= ~(NFSCLFLAGS_EXPIREIT | NFSCLFLAGS_RECVRINPROG);
2225 wakeup(&clp->nfsc_flags);
2226 nfsv4_unlock(&clp->nfsc_lock, 0);
2227 NFSUNLOCKCLSTATE();
2228 NFSFREECRED(cred);
2229 return (error);
2230 }
2231
2232 /*
2233 * This function inserts a lock in the list after insert_lop.
2234 */
2235 static void
2236 nfscl_insertlock(struct nfscllockowner *lp, struct nfscllock *new_lop,
2237 struct nfscllock *insert_lop, int local)
2238 {
2239
2240 if ((struct nfscllockowner *)insert_lop == lp)
2241 LIST_INSERT_HEAD(&lp->nfsl_lock, new_lop, nfslo_list);
2242 else
2243 LIST_INSERT_AFTER(insert_lop, new_lop, nfslo_list);
2244 if (local)
2245 newnfsstats.cllocallocks++;
2246 else
2247 newnfsstats.cllocks++;
2248 }
2249
2250 /*
2251 * This function updates the locking for a lock owner and given file. It
2252 * maintains a list of lock ranges ordered on increasing file offset that
2253 * are NFSCLLOCK_READ or NFSCLLOCK_WRITE and non-overlapping (aka POSIX style).
2254 * It always adds new_lop to the list and sometimes uses the one pointed
2255 * at by other_lopp.
2256 * Returns 1 if the locks were modified, 0 otherwise.
2257 */
2258 static int
2259 nfscl_updatelock(struct nfscllockowner *lp, struct nfscllock **new_lopp,
2260 struct nfscllock **other_lopp, int local)
2261 {
2262 struct nfscllock *new_lop = *new_lopp;
2263 struct nfscllock *lop, *tlop, *ilop;
2264 struct nfscllock *other_lop;
2265 int unlock = 0, modified = 0;
2266 u_int64_t tmp;
2267
2268 /*
2269 * Work down the list until the lock is merged.
2270 */
2271 if (new_lop->nfslo_type == F_UNLCK)
2272 unlock = 1;
2273 ilop = (struct nfscllock *)lp;
2274 lop = LIST_FIRST(&lp->nfsl_lock);
2275 while (lop != NULL) {
2276 /*
2277 * Only check locks for this file that aren't before the start of
2278 * new lock's range.
2279 */
2280 if (lop->nfslo_end >= new_lop->nfslo_first) {
2281 if (new_lop->nfslo_end < lop->nfslo_first) {
2282 /*
2283 * If the new lock ends before the start of the
2284 * current lock's range, no merge, just insert
2285 * the new lock.
2286 */
2287 break;
2288 }
2289 if (new_lop->nfslo_type == lop->nfslo_type ||
2290 (new_lop->nfslo_first <= lop->nfslo_first &&
2291 new_lop->nfslo_end >= lop->nfslo_end)) {
2292 /*
2293 * This lock can be absorbed by the new lock/unlock.
2294 * This happens when it covers the entire range
2295 * of the old lock or is contiguous
2296 * with the old lock and is of the same type or an
2297 * unlock.
2298 */
2299 if (new_lop->nfslo_type != lop->nfslo_type ||
2300 new_lop->nfslo_first != lop->nfslo_first ||
2301 new_lop->nfslo_end != lop->nfslo_end)
2302 modified = 1;
2303 if (lop->nfslo_first < new_lop->nfslo_first)
2304 new_lop->nfslo_first = lop->nfslo_first;
2305 if (lop->nfslo_end > new_lop->nfslo_end)
2306 new_lop->nfslo_end = lop->nfslo_end;
2307 tlop = lop;
2308 lop = LIST_NEXT(lop, nfslo_list);
2309 nfscl_freelock(tlop, local);
2310 continue;
2311 }
2312
2313 /*
2314 * All these cases are for contiguous locks that are not the
2315 * same type, so they can't be merged.
2316 */
2317 if (new_lop->nfslo_first <= lop->nfslo_first) {
2318 /*
2319 * This case is where the new lock overlaps with the
2320 * first part of the old lock. Move the start of the
2321 * old lock to just past the end of the new lock. The
2322 * new lock will be inserted in front of the old, since
2323 * ilop hasn't been updated. (We are done now.)
2324 */
2325 if (lop->nfslo_first != new_lop->nfslo_end) {
2326 lop->nfslo_first = new_lop->nfslo_end;
2327 modified = 1;
2328 }
2329 break;
2330 }
2331 if (new_lop->nfslo_end >= lop->nfslo_end) {
2332 /*
2333 * This case is where the new lock overlaps with the
2334 * end of the old lock's range. Move the old lock's
2335 * end to just before the new lock's first and insert
2336 * the new lock after the old lock.
2337 * Might not be done yet, since the new lock could
2338 * overlap further locks with higher ranges.
2339 */
2340 if (lop->nfslo_end != new_lop->nfslo_first) {
2341 lop->nfslo_end = new_lop->nfslo_first;
2342 modified = 1;
2343 }
2344 ilop = lop;
2345 lop = LIST_NEXT(lop, nfslo_list);
2346 continue;
2347 }
2348 /*
2349 * The final case is where the new lock's range is in the
2350 * middle of the current lock's and splits the current lock
2351 * up. Use *other_lopp to handle the second part of the
2352 * split old lock range. (We are done now.)
2353 * For unlock, we use new_lop as other_lop and tmp, since
2354 * other_lop and new_lop are the same for this case.
2355 * We noted the unlock case above, so we don't need
2356 * new_lop->nfslo_type any longer.
2357 */
2358 tmp = new_lop->nfslo_first;
2359 if (unlock) {
2360 other_lop = new_lop;
2361 *new_lopp = NULL;
2362 } else {
2363 other_lop = *other_lopp;
2364 *other_lopp = NULL;
2365 }
2366 other_lop->nfslo_first = new_lop->nfslo_end;
2367 other_lop->nfslo_end = lop->nfslo_end;
2368 other_lop->nfslo_type = lop->nfslo_type;
2369 lop->nfslo_end = tmp;
2370 nfscl_insertlock(lp, other_lop, lop, local);
2371 ilop = lop;
2372 modified = 1;
2373 break;
2374 }
2375 ilop = lop;
2376 lop = LIST_NEXT(lop, nfslo_list);
2377 if (lop == NULL)
2378 break;
2379 }
2380
2381 /*
2382 * Insert the new lock in the list at the appropriate place.
2383 */
2384 if (!unlock) {
2385 nfscl_insertlock(lp, new_lop, ilop, local);
2386 *new_lopp = NULL;
2387 modified = 1;
2388 }
2389 return (modified);
2390 }
2391
2392 /*
2393 * This function must be run as a kernel thread.
2394 * It does Renew Ops and recovery, when required.
2395 */
2396 APPLESTATIC void
2397 nfscl_renewthread(struct nfsclclient *clp, NFSPROC_T *p)
2398 {
2399 struct nfsclowner *owp, *nowp;
2400 struct nfsclopen *op;
2401 struct nfscllockowner *lp, *nlp, *olp;
2402 struct nfscldeleghead dh;
2403 struct nfscllockownerhead lh;
2404 struct nfscldeleg *dp, *ndp;
2405 struct ucred *cred;
2406 u_int32_t clidrev;
2407 int error, cbpathdown, islept, igotlock, ret, clearok;
2408 uint32_t recover_done_time = 0;
2409
2410 cred = newnfs_getcred();
2411 NFSLOCKCLSTATE();
2412 clp->nfsc_flags |= NFSCLFLAGS_HASTHREAD;
2413 NFSUNLOCKCLSTATE();
2414 for(;;) {
2415 newnfs_setroot(cred);
2416 cbpathdown = 0;
2417 if (clp->nfsc_flags & NFSCLFLAGS_RECOVER) {
2418 /*
2419 * Only allow one recover within 1/2 of the lease
2420 * duration (nfsc_renew).
2421 */
2422 if (recover_done_time < NFSD_MONOSEC) {
2423 recover_done_time = NFSD_MONOSEC +
2424 clp->nfsc_renew;
2425 nfscl_recover(clp, cred, p);
2426 } else {
2427 NFSLOCKCLSTATE();
2428 clp->nfsc_flags &= ~NFSCLFLAGS_RECOVER;
2429 NFSUNLOCKCLSTATE();
2430 }
2431 }
2432 if (clp->nfsc_expire <= NFSD_MONOSEC &&
2433 (clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID)) {
2434 clp->nfsc_expire = NFSD_MONOSEC + clp->nfsc_renew;
2435 clidrev = clp->nfsc_clientidrev;
2436 error = nfsrpc_renew(clp, cred, p);
2437 if (error == NFSERR_CBPATHDOWN)
2438 cbpathdown = 1;
2439 else if (error == NFSERR_STALECLIENTID) {
2440 NFSLOCKCLSTATE();
2441 clp->nfsc_flags |= NFSCLFLAGS_RECOVER;
2442 NFSUNLOCKCLSTATE();
2443 } else if (error == NFSERR_EXPIRED)
2444 (void) nfscl_hasexpired(clp, clidrev, p);
2445 }
2446
2447 LIST_INIT(&lh);
2448 TAILQ_INIT(&dh);
2449 NFSLOCKCLSTATE();
2450 if (cbpathdown)
2451 /* It's a Total Recall! */
2452 nfscl_totalrecall(clp);
2453
2454 /*
2455 * Now, handle defunct owners.
2456 */
2457 owp = LIST_FIRST(&clp->nfsc_owner);
2458 while (owp != NULL) {
2459 nowp = LIST_NEXT(owp, nfsow_list);
2460 if (LIST_EMPTY(&owp->nfsow_open)) {
2461 if (owp->nfsow_defunct)
2462 nfscl_freeopenowner(owp, 0);
2463 } else {
2464 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
2465 lp = LIST_FIRST(&op->nfso_lock);
2466 while (lp != NULL) {
2467 nlp = LIST_NEXT(lp, nfsl_list);
2468 if (lp->nfsl_defunct &&
2469 LIST_EMPTY(&lp->nfsl_lock)) {
2470 LIST_FOREACH(olp, &lh, nfsl_list) {
2471 if (!NFSBCMP(olp->nfsl_owner,
2472 lp->nfsl_owner,NFSV4CL_LOCKNAMELEN))
2473 break;
2474 }
2475 if (olp == NULL) {
2476 LIST_REMOVE(lp, nfsl_list);
2477 LIST_INSERT_HEAD(&lh, lp, nfsl_list);
2478 } else {
2479 nfscl_freelockowner(lp, 0);
2480 }
2481 }
2482 lp = nlp;
2483 }
2484 }
2485 }
2486 owp = nowp;
2487 }
2488
2489 /* also search the defunct list */
2490 lp = LIST_FIRST(&clp->nfsc_defunctlockowner);
2491 while (lp != NULL) {
2492 nlp = LIST_NEXT(lp, nfsl_list);
2493 if (lp->nfsl_defunct) {
2494 LIST_FOREACH(olp, &lh, nfsl_list) {
2495 if (!NFSBCMP(olp->nfsl_owner, lp->nfsl_owner,
2496 NFSV4CL_LOCKNAMELEN))
2497 break;
2498 }
2499 if (olp == NULL) {
2500 LIST_REMOVE(lp, nfsl_list);
2501 LIST_INSERT_HEAD(&lh, lp, nfsl_list);
2502 } else {
2503 nfscl_freelockowner(lp, 0);
2504 }
2505 }
2506 lp = nlp;
2507 }
2508 /* and release defunct lock owners */
2509 LIST_FOREACH_SAFE(lp, &lh, nfsl_list, nlp) {
2510 nfscl_freelockowner(lp, 0);
2511 }
2512
2513 /*
2514 * Do the recall on any delegations. To avoid trouble, always
2515 * come back up here after having slept.
2516 */
2517 igotlock = 0;
2518 tryagain:
2519 dp = TAILQ_FIRST(&clp->nfsc_deleg);
2520 while (dp != NULL) {
2521 ndp = TAILQ_NEXT(dp, nfsdl_list);
2522 if ((dp->nfsdl_flags & NFSCLDL_RECALL)) {
2523 /*
2524 * Wait for outstanding I/O ops to be done.
2525 */
2526 if (dp->nfsdl_rwlock.nfslock_usecnt > 0) {
2527 if (igotlock) {
2528 nfsv4_unlock(&clp->nfsc_lock, 0);
2529 igotlock = 0;
2530 }
2531 dp->nfsdl_rwlock.nfslock_lock |=
2532 NFSV4LOCK_WANTED;
2533 (void) nfsmsleep(&dp->nfsdl_rwlock,
2534 NFSCLSTATEMUTEXPTR, PZERO, "nfscld",
2535 NULL);
2536 goto tryagain;
2537 }
2538 while (!igotlock) {
2539 igotlock = nfsv4_lock(&clp->nfsc_lock, 1,
2540 &islept, NFSCLSTATEMUTEXPTR, NULL);
2541 if (islept)
2542 goto tryagain;
2543 }
2544 NFSUNLOCKCLSTATE();
2545 newnfs_copycred(&dp->nfsdl_cred, cred);
2546 ret = nfscl_recalldeleg(clp, clp->nfsc_nmp, dp,
2547 NULL, cred, p, 1);
2548 if (!ret) {
2549 nfscl_cleandeleg(dp);
2550 TAILQ_REMOVE(&clp->nfsc_deleg, dp,
2551 nfsdl_list);
2552 LIST_REMOVE(dp, nfsdl_hash);
2553 TAILQ_INSERT_HEAD(&dh, dp, nfsdl_list);
2554 nfscl_delegcnt--;
2555 newnfsstats.cldelegates--;
2556 }
2557 NFSLOCKCLSTATE();
2558 }
2559 dp = ndp;
2560 }
2561
2562 /*
2563 * Clear out old delegations, if we are above the high water
2564 * mark. Only clear out ones with no state related to them.
2565 * The tailq list is in LRU order.
2566 */
2567 dp = TAILQ_LAST(&clp->nfsc_deleg, nfscldeleghead);
2568 while (nfscl_delegcnt > nfscl_deleghighwater && dp != NULL) {
2569 ndp = TAILQ_PREV(dp, nfscldeleghead, nfsdl_list);
2570 if (dp->nfsdl_rwlock.nfslock_usecnt == 0 &&
2571 dp->nfsdl_rwlock.nfslock_lock == 0 &&
2572 dp->nfsdl_timestamp < NFSD_MONOSEC &&
2573 (dp->nfsdl_flags & (NFSCLDL_RECALL | NFSCLDL_ZAPPED |
2574 NFSCLDL_NEEDRECLAIM | NFSCLDL_DELEGRET)) == 0) {
2575 clearok = 1;
2576 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) {
2577 op = LIST_FIRST(&owp->nfsow_open);
2578 if (op != NULL) {
2579 clearok = 0;
2580 break;
2581 }
2582 }
2583 if (clearok) {
2584 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) {
2585 if (!LIST_EMPTY(&lp->nfsl_lock)) {
2586 clearok = 0;
2587 break;
2588 }
2589 }
2590 }
2591 if (clearok) {
2592 TAILQ_REMOVE(&clp->nfsc_deleg, dp, nfsdl_list);
2593 LIST_REMOVE(dp, nfsdl_hash);
2594 TAILQ_INSERT_HEAD(&dh, dp, nfsdl_list);
2595 nfscl_delegcnt--;
2596 newnfsstats.cldelegates--;
2597 }
2598 }
2599 dp = ndp;
2600 }
2601 if (igotlock)
2602 nfsv4_unlock(&clp->nfsc_lock, 0);
2603 NFSUNLOCKCLSTATE();
2604
2605 /*
2606 * Delegreturn any delegations cleaned out or recalled.
2607 */
2608 TAILQ_FOREACH_SAFE(dp, &dh, nfsdl_list, ndp) {
2609 newnfs_copycred(&dp->nfsdl_cred, cred);
2610 (void) nfscl_trydelegreturn(dp, cred, clp->nfsc_nmp, p);
2611 TAILQ_REMOVE(&dh, dp, nfsdl_list);
2612 FREE((caddr_t)dp, M_NFSCLDELEG);
2613 }
2614
2615 #if defined(APPLEKEXT) || defined(__FreeBSD__)
2616 /*
2617 * Simulate the calls to nfscl_cleanup() when a process
2618 * exits, since the call can't be patched into exit().
2619 */
2620 {
2621 struct timespec mytime;
2622 static time_t prevsec = 0;
2623
2624 NFSGETNANOTIME(&mytime);
2625 if (prevsec != mytime.tv_sec) {
2626 prevsec = mytime.tv_sec;
2627 nfscl_cleanupkext(clp);
2628 }
2629 }
2630 #endif /* APPLEKEXT || __FreeBSD__ */
2631
2632 NFSLOCKCLSTATE();
2633 if ((clp->nfsc_flags & NFSCLFLAGS_RECOVER) == 0)
2634 (void)mtx_sleep(clp, NFSCLSTATEMUTEXPTR, PWAIT, "nfscl",
2635 hz);
2636 if (clp->nfsc_flags & NFSCLFLAGS_UMOUNT) {
2637 clp->nfsc_flags &= ~NFSCLFLAGS_HASTHREAD;
2638 NFSUNLOCKCLSTATE();
2639 NFSFREECRED(cred);
2640 wakeup((caddr_t)clp);
2641 return;
2642 }
2643 NFSUNLOCKCLSTATE();
2644 }
2645 }
2646
2647 /*
2648 * Initiate state recovery. Called when NFSERR_STALECLIENTID or
2649 * NFSERR_STALESTATEID is received.
2650 */
2651 APPLESTATIC void
2652 nfscl_initiate_recovery(struct nfsclclient *clp)
2653 {
2654
2655 if (clp == NULL)
2656 return;
2657 NFSLOCKCLSTATE();
2658 clp->nfsc_flags |= NFSCLFLAGS_RECOVER;
2659 NFSUNLOCKCLSTATE();
2660 wakeup((caddr_t)clp);
2661 }
2662
2663 /*
2664 * Dump out the state stuff for debugging.
2665 */
2666 APPLESTATIC void
2667 nfscl_dumpstate(struct nfsmount *nmp, int openowner, int opens,
2668 int lockowner, int locks)
2669 {
2670 struct nfsclclient *clp;
2671 struct nfsclowner *owp;
2672 struct nfsclopen *op;
2673 struct nfscllockowner *lp;
2674 struct nfscllock *lop;
2675 struct nfscldeleg *dp;
2676
2677 clp = nmp->nm_clp;
2678 if (clp == NULL) {
2679 printf("nfscl dumpstate NULL clp\n");
2680 return;
2681 }
2682 NFSLOCKCLSTATE();
2683 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) {
2684 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) {
2685 if (openowner && !LIST_EMPTY(&owp->nfsow_open))
2686 printf("owner=0x%x 0x%x 0x%x 0x%x seqid=%d\n",
2687 owp->nfsow_owner[0], owp->nfsow_owner[1],
2688 owp->nfsow_owner[2], owp->nfsow_owner[3],
2689 owp->nfsow_seqid);
2690 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
2691 if (opens)
2692 printf("open st=0x%x 0x%x 0x%x cnt=%d fh12=0x%x\n",
2693 op->nfso_stateid.other[0], op->nfso_stateid.other[1],
2694 op->nfso_stateid.other[2], op->nfso_opencnt,
2695 op->nfso_fh[12]);
2696 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) {
2697 if (lockowner)
2698 printf("lckown=0x%x 0x%x 0x%x 0x%x seqid=%d st=0x%x 0x%x 0x%x\n",
2699 lp->nfsl_owner[0], lp->nfsl_owner[1],
2700 lp->nfsl_owner[2], lp->nfsl_owner[3],
2701 lp->nfsl_seqid,
2702 lp->nfsl_stateid.other[0], lp->nfsl_stateid.other[1],
2703 lp->nfsl_stateid.other[2]);
2704 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) {
2705 if (locks)
2706 #ifdef __FreeBSD__
2707 printf("lck typ=%d fst=%ju end=%ju\n",
2708 lop->nfslo_type, (intmax_t)lop->nfslo_first,
2709 (intmax_t)lop->nfslo_end);
2710 #else
2711 printf("lck typ=%d fst=%qd end=%qd\n",
2712 lop->nfslo_type, lop->nfslo_first,
2713 lop->nfslo_end);
2714 #endif
2715 }
2716 }
2717 }
2718 }
2719 }
2720 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
2721 if (openowner && !LIST_EMPTY(&owp->nfsow_open))
2722 printf("owner=0x%x 0x%x 0x%x 0x%x seqid=%d\n",
2723 owp->nfsow_owner[0], owp->nfsow_owner[1],
2724 owp->nfsow_owner[2], owp->nfsow_owner[3],
2725 owp->nfsow_seqid);
2726 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
2727 if (opens)
2728 printf("open st=0x%x 0x%x 0x%x cnt=%d fh12=0x%x\n",
2729 op->nfso_stateid.other[0], op->nfso_stateid.other[1],
2730 op->nfso_stateid.other[2], op->nfso_opencnt,
2731 op->nfso_fh[12]);
2732 LIST_FOREACH(lp, &op->nfso_lock, nfsl_list) {
2733 if (lockowner)
2734 printf("lckown=0x%x 0x%x 0x%x 0x%x seqid=%d st=0x%x 0x%x 0x%x\n",
2735 lp->nfsl_owner[0], lp->nfsl_owner[1],
2736 lp->nfsl_owner[2], lp->nfsl_owner[3],
2737 lp->nfsl_seqid,
2738 lp->nfsl_stateid.other[0], lp->nfsl_stateid.other[1],
2739 lp->nfsl_stateid.other[2]);
2740 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) {
2741 if (locks)
2742 #ifdef __FreeBSD__
2743 printf("lck typ=%d fst=%ju end=%ju\n",
2744 lop->nfslo_type, (intmax_t)lop->nfslo_first,
2745 (intmax_t)lop->nfslo_end);
2746 #else
2747 printf("lck typ=%d fst=%qd end=%qd\n",
2748 lop->nfslo_type, lop->nfslo_first,
2749 lop->nfslo_end);
2750 #endif
2751 }
2752 }
2753 }
2754 }
2755 NFSUNLOCKCLSTATE();
2756 }
2757
2758 /*
2759 * Check for duplicate open owners and opens.
2760 * (Only used as a diagnostic aid.)
2761 */
2762 APPLESTATIC void
2763 nfscl_dupopen(vnode_t vp, int dupopens)
2764 {
2765 struct nfsclclient *clp;
2766 struct nfsclowner *owp, *owp2;
2767 struct nfsclopen *op, *op2;
2768 struct nfsfh *nfhp;
2769
2770 clp = VFSTONFS(vnode_mount(vp))->nm_clp;
2771 if (clp == NULL) {
2772 printf("nfscl dupopen NULL clp\n");
2773 return;
2774 }
2775 nfhp = VTONFS(vp)->n_fhp;
2776 NFSLOCKCLSTATE();
2777
2778 /*
2779 * First, search for duplicate owners.
2780 * These should never happen!
2781 */
2782 LIST_FOREACH(owp2, &clp->nfsc_owner, nfsow_list) {
2783 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
2784 if (owp != owp2 &&
2785 !NFSBCMP(owp->nfsow_owner, owp2->nfsow_owner,
2786 NFSV4CL_LOCKNAMELEN)) {
2787 NFSUNLOCKCLSTATE();
2788 printf("DUP OWNER\n");
2789 nfscl_dumpstate(VFSTONFS(vnode_mount(vp)), 1, 1, 0, 0);
2790 return;
2791 }
2792 }
2793 }
2794
2795 /*
2796 * Now, search for duplicate stateids.
2797 * These shouldn't happen, either.
2798 */
2799 LIST_FOREACH(owp2, &clp->nfsc_owner, nfsow_list) {
2800 LIST_FOREACH(op2, &owp2->nfsow_open, nfso_list) {
2801 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
2802 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
2803 if (op != op2 &&
2804 (op->nfso_stateid.other[0] != 0 ||
2805 op->nfso_stateid.other[1] != 0 ||
2806 op->nfso_stateid.other[2] != 0) &&
2807 op->nfso_stateid.other[0] == op2->nfso_stateid.other[0] &&
2808 op->nfso_stateid.other[1] == op2->nfso_stateid.other[1] &&
2809 op->nfso_stateid.other[2] == op2->nfso_stateid.other[2]) {
2810 NFSUNLOCKCLSTATE();
2811 printf("DUP STATEID\n");
2812 nfscl_dumpstate(VFSTONFS(vnode_mount(vp)), 1, 1, 0,
2813 0);
2814 return;
2815 }
2816 }
2817 }
2818 }
2819 }
2820
2821 /*
2822 * Now search for duplicate opens.
2823 * Duplicate opens for the same owner
2824 * should never occur. Other duplicates are
2825 * possible and are checked for if "dupopens"
2826 * is true.
2827 */
2828 LIST_FOREACH(owp2, &clp->nfsc_owner, nfsow_list) {
2829 LIST_FOREACH(op2, &owp2->nfsow_open, nfso_list) {
2830 if (nfhp->nfh_len == op2->nfso_fhlen &&
2831 !NFSBCMP(nfhp->nfh_fh, op2->nfso_fh, nfhp->nfh_len)) {
2832 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
2833 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
2834 if (op != op2 && nfhp->nfh_len == op->nfso_fhlen &&
2835 !NFSBCMP(nfhp->nfh_fh, op->nfso_fh, nfhp->nfh_len) &&
2836 (!NFSBCMP(op->nfso_own->nfsow_owner,
2837 op2->nfso_own->nfsow_owner, NFSV4CL_LOCKNAMELEN) ||
2838 dupopens)) {
2839 if (!NFSBCMP(op->nfso_own->nfsow_owner,
2840 op2->nfso_own->nfsow_owner, NFSV4CL_LOCKNAMELEN)) {
2841 NFSUNLOCKCLSTATE();
2842 printf("BADDUP OPEN\n");
2843 } else {
2844 NFSUNLOCKCLSTATE();
2845 printf("DUP OPEN\n");
2846 }
2847 nfscl_dumpstate(VFSTONFS(vnode_mount(vp)), 1, 1,
2848 0, 0);
2849 return;
2850 }
2851 }
2852 }
2853 }
2854 }
2855 }
2856 NFSUNLOCKCLSTATE();
2857 }
2858
2859 /*
2860 * During close, find an open that needs to be dereferenced and
2861 * dereference it. If there are no more opens for this file,
2862 * log a message to that effect.
2863 * Opens aren't actually Close'd until VOP_INACTIVE() is performed
2864 * on the file's vnode.
2865 * This is the safe way, since it is difficult to identify
2866 * which open the close is for and I/O can be performed after the
2867 * close(2) system call when a file is mmap'd.
2868 * If it returns 0 for success, there will be a referenced
2869 * clp returned via clpp.
2870 */
2871 APPLESTATIC int
2872 nfscl_getclose(vnode_t vp, struct nfsclclient **clpp)
2873 {
2874 struct nfsclclient *clp;
2875 struct nfsclowner *owp;
2876 struct nfsclopen *op;
2877 struct nfscldeleg *dp;
2878 struct nfsfh *nfhp;
2879 int error, notdecr;
2880
2881 error = nfscl_getcl(vp, NULL, NULL, &clp);
2882 if (error)
2883 return (error);
2884 *clpp = clp;
2885
2886 nfhp = VTONFS(vp)->n_fhp;
2887 notdecr = 1;
2888 NFSLOCKCLSTATE();
2889 /*
2890 * First, look for one under a delegation that was locally issued
2891 * and just decrement the opencnt for it. Since all my Opens against
2892 * the server are DENY_NONE, I don't see a problem with hanging
2893 * onto them. (It is much easier to use one of the extant Opens
2894 * that I already have on the server when a Delegation is recalled
2895 * than to do fresh Opens.) Someday, I might need to rethink this, but.
2896 */
2897 dp = nfscl_finddeleg(clp, nfhp->nfh_fh, nfhp->nfh_len);
2898 if (dp != NULL) {
2899 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) {
2900 op = LIST_FIRST(&owp->nfsow_open);
2901 if (op != NULL) {
2902 /*
2903 * Since a delegation is for a file, there
2904 * should never be more than one open for
2905 * each openowner.
2906 */
2907 if (LIST_NEXT(op, nfso_list) != NULL)
2908 panic("nfscdeleg opens");
2909 if (notdecr && op->nfso_opencnt > 0) {
2910 notdecr = 0;
2911 op->nfso_opencnt--;
2912 break;
2913 }
2914 }
2915 }
2916 }
2917
2918 /* Now process the opens against the server. */
2919 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
2920 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
2921 if (op->nfso_fhlen == nfhp->nfh_len &&
2922 !NFSBCMP(op->nfso_fh, nfhp->nfh_fh,
2923 nfhp->nfh_len)) {
2924 /* Found an open, decrement cnt if possible */
2925 if (notdecr && op->nfso_opencnt > 0) {
2926 notdecr = 0;
2927 op->nfso_opencnt--;
2928 }
2929 /*
2930 * There are more opens, so just return.
2931 */
2932 if (op->nfso_opencnt > 0) {
2933 NFSUNLOCKCLSTATE();
2934 return (0);
2935 }
2936 }
2937 }
2938 }
2939 NFSUNLOCKCLSTATE();
2940 if (notdecr)
2941 printf("nfscl: never fnd open\n");
2942 return (0);
2943 }
2944
2945 APPLESTATIC int
2946 nfscl_doclose(vnode_t vp, struct nfsclclient **clpp, NFSPROC_T *p)
2947 {
2948 struct nfsclclient *clp;
2949 struct nfsclowner *owp, *nowp;
2950 struct nfsclopen *op;
2951 struct nfscldeleg *dp;
2952 struct nfsfh *nfhp;
2953 int error;
2954
2955 error = nfscl_getcl(vp, NULL, NULL, &clp);
2956 if (error)
2957 return (error);
2958 *clpp = clp;
2959
2960 nfhp = VTONFS(vp)->n_fhp;
2961 NFSLOCKCLSTATE();
2962 /*
2963 * First get rid of the local Open structures, which should be no
2964 * longer in use.
2965 */
2966 dp = nfscl_finddeleg(clp, nfhp->nfh_fh, nfhp->nfh_len);
2967 if (dp != NULL) {
2968 LIST_FOREACH_SAFE(owp, &dp->nfsdl_owner, nfsow_list, nowp) {
2969 op = LIST_FIRST(&owp->nfsow_open);
2970 if (op != NULL) {
2971 KASSERT((op->nfso_opencnt == 0),
2972 ("nfscl: bad open cnt on deleg"));
2973 nfscl_freeopen(op, 1);
2974 }
2975 nfscl_freeopenowner(owp, 1);
2976 }
2977 }
2978
2979 /* Now process the opens against the server. */
2980 lookformore:
2981 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
2982 op = LIST_FIRST(&owp->nfsow_open);
2983 while (op != NULL) {
2984 if (op->nfso_fhlen == nfhp->nfh_len &&
2985 !NFSBCMP(op->nfso_fh, nfhp->nfh_fh,
2986 nfhp->nfh_len)) {
2987 /* Found an open, close it. */
2988 KASSERT((op->nfso_opencnt == 0),
2989 ("nfscl: bad open cnt on server"));
2990 NFSUNLOCKCLSTATE();
2991 nfsrpc_doclose(VFSTONFS(vnode_mount(vp)), op,
2992 p);
2993 NFSLOCKCLSTATE();
2994 goto lookformore;
2995 }
2996 op = LIST_NEXT(op, nfso_list);
2997 }
2998 }
2999 NFSUNLOCKCLSTATE();
3000 return (0);
3001 }
3002
3003 /*
3004 * Return all delegations on this client.
3005 * (Must be called with client sleep lock.)
3006 */
3007 static void
3008 nfscl_delegreturnall(struct nfsclclient *clp, NFSPROC_T *p)
3009 {
3010 struct nfscldeleg *dp, *ndp;
3011 struct ucred *cred;
3012
3013 cred = newnfs_getcred();
3014 TAILQ_FOREACH_SAFE(dp, &clp->nfsc_deleg, nfsdl_list, ndp) {
3015 nfscl_cleandeleg(dp);
3016 (void) nfscl_trydelegreturn(dp, cred, clp->nfsc_nmp, p);
3017 nfscl_freedeleg(&clp->nfsc_deleg, dp);
3018 }
3019 NFSFREECRED(cred);
3020 }
3021
3022 /*
3023 * Do a callback RPC.
3024 */
3025 APPLESTATIC void
3026 nfscl_docb(struct nfsrv_descript *nd, NFSPROC_T *p)
3027 {
3028 int i, op;
3029 u_int32_t *tl;
3030 struct nfsclclient *clp;
3031 struct nfscldeleg *dp = NULL;
3032 int numops, taglen = -1, error = 0, trunc, ret = 0;
3033 u_int32_t minorvers, retops = 0, *retopsp = NULL, *repp, cbident;
3034 u_char tag[NFSV4_SMALLSTR + 1], *tagstr;
3035 vnode_t vp = NULL;
3036 struct nfsnode *np;
3037 struct vattr va;
3038 struct nfsfh *nfhp;
3039 mount_t mp;
3040 nfsattrbit_t attrbits, rattrbits;
3041 nfsv4stateid_t stateid;
3042
3043 nfsrvd_rephead(nd);
3044 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
3045 taglen = fxdr_unsigned(int, *tl);
3046 if (taglen < 0) {
3047 error = EBADRPC;
3048 goto nfsmout;
3049 }
3050 if (taglen <= NFSV4_SMALLSTR)
3051 tagstr = tag;
3052 else
3053 tagstr = malloc(taglen + 1, M_TEMP, M_WAITOK);
3054 error = nfsrv_mtostr(nd, tagstr, taglen);
3055 if (error) {
3056 if (taglen > NFSV4_SMALLSTR)
3057 free(tagstr, M_TEMP);
3058 taglen = -1;
3059 goto nfsmout;
3060 }
3061 (void) nfsm_strtom(nd, tag, taglen);
3062 if (taglen > NFSV4_SMALLSTR) {
3063 free(tagstr, M_TEMP);
3064 }
3065 NFSM_BUILD(retopsp, u_int32_t *, NFSX_UNSIGNED);
3066 NFSM_DISSECT(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
3067 minorvers = fxdr_unsigned(u_int32_t, *tl++);
3068 if (minorvers != NFSV4_MINORVERSION)
3069 nd->nd_repstat = NFSERR_MINORVERMISMATCH;
3070 cbident = fxdr_unsigned(u_int32_t, *tl++);
3071 if (nd->nd_repstat)
3072 numops = 0;
3073 else
3074 numops = fxdr_unsigned(int, *tl);
3075 /*
3076 * Loop around doing the sub ops.
3077 */
3078 for (i = 0; i < numops; i++) {
3079 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
3080 NFSM_BUILD(repp, u_int32_t *, 2 * NFSX_UNSIGNED);
3081 *repp++ = *tl;
3082 op = fxdr_unsigned(int, *tl);
3083 if (op < NFSV4OP_CBGETATTR || op > NFSV4OP_CBRECALL) {
3084 nd->nd_repstat = NFSERR_OPILLEGAL;
3085 *repp = nfscl_errmap(nd);
3086 retops++;
3087 break;
3088 }
3089 nd->nd_procnum = op;
3090 newnfsstats.cbrpccnt[nd->nd_procnum]++;
3091 switch (op) {
3092 case NFSV4OP_CBGETATTR:
3093 clp = NULL;
3094 error = nfsm_getfh(nd, &nfhp);
3095 if (!error)
3096 error = nfsrv_getattrbits(nd, &attrbits,
3097 NULL, NULL);
3098 if (!error) {
3099 mp = nfscl_getmnt(cbident);
3100 if (mp == NULL)
3101 error = NFSERR_SERVERFAULT;
3102 }
3103 if (!error) {
3104 dp = NULL;
3105 NFSLOCKCLSTATE();
3106 clp = nfscl_findcl(VFSTONFS(mp));
3107 if (clp != NULL)
3108 dp = nfscl_finddeleg(clp, nfhp->nfh_fh,
3109 nfhp->nfh_len);
3110 NFSUNLOCKCLSTATE();
3111 if (dp == NULL)
3112 error = NFSERR_SERVERFAULT;
3113 }
3114 if (!error) {
3115 ret = nfscl_ngetreopen(mp, nfhp->nfh_fh,
3116 nfhp->nfh_len, p, &np);
3117 if (!ret)
3118 vp = NFSTOV(np);
3119 }
3120 if (nfhp != NULL)
3121 FREE((caddr_t)nfhp, M_NFSFH);
3122 if (!error) {
3123 NFSZERO_ATTRBIT(&rattrbits);
3124 if (NFSISSET_ATTRBIT(&attrbits,
3125 NFSATTRBIT_SIZE)) {
3126 if (!ret)
3127 va.va_size = np->n_size;
3128 else
3129 va.va_size = dp->nfsdl_size;
3130 NFSSETBIT_ATTRBIT(&rattrbits,
3131 NFSATTRBIT_SIZE);
3132 }
3133 if (NFSISSET_ATTRBIT(&attrbits,
3134 NFSATTRBIT_CHANGE)) {
3135 va.va_filerev = dp->nfsdl_change;
3136 if (ret || (np->n_flag & NDELEGMOD))
3137 va.va_filerev++;
3138 NFSSETBIT_ATTRBIT(&rattrbits,
3139 NFSATTRBIT_CHANGE);
3140 }
3141 (void) nfsv4_fillattr(nd, NULL, NULL, NULL, &va,
3142 NULL, 0, &rattrbits, NULL, NULL, 0, 0, 0, 0,
3143 (uint64_t)0);
3144 if (!ret)
3145 vrele(vp);
3146 }
3147 break;
3148 case NFSV4OP_CBRECALL:
3149 clp = NULL;
3150 NFSM_DISSECT(tl, u_int32_t *, NFSX_STATEID +
3151 NFSX_UNSIGNED);
3152 stateid.seqid = *tl++;
3153 NFSBCOPY((caddr_t)tl, (caddr_t)stateid.other,
3154 NFSX_STATEIDOTHER);
3155 tl += (NFSX_STATEIDOTHER / NFSX_UNSIGNED);
3156 trunc = fxdr_unsigned(int, *tl);
3157 error = nfsm_getfh(nd, &nfhp);
3158 if (!error) {
3159 mp = nfscl_getmnt(cbident);
3160 if (mp == NULL)
3161 error = NFSERR_SERVERFAULT;
3162 }
3163 if (!error) {
3164 NFSLOCKCLSTATE();
3165 clp = nfscl_findcl(VFSTONFS(mp));
3166 if (clp != NULL) {
3167 dp = nfscl_finddeleg(clp, nfhp->nfh_fh,
3168 nfhp->nfh_len);
3169 if (dp != NULL && (dp->nfsdl_flags &
3170 NFSCLDL_DELEGRET) == 0) {
3171 dp->nfsdl_flags |=
3172 NFSCLDL_RECALL;
3173 wakeup((caddr_t)clp);
3174 }
3175 } else {
3176 error = NFSERR_SERVERFAULT;
3177 }
3178 NFSUNLOCKCLSTATE();
3179 }
3180 if (nfhp != NULL)
3181 FREE((caddr_t)nfhp, M_NFSFH);
3182 break;
3183 };
3184 if (error) {
3185 if (error == EBADRPC || error == NFSERR_BADXDR) {
3186 nd->nd_repstat = NFSERR_BADXDR;
3187 } else {
3188 nd->nd_repstat = error;
3189 }
3190 error = 0;
3191 }
3192 retops++;
3193 if (nd->nd_repstat) {
3194 *repp = nfscl_errmap(nd);
3195 break;
3196 } else
3197 *repp = 0; /* NFS4_OK */
3198 }
3199 nfsmout:
3200 if (error) {
3201 if (error == EBADRPC || error == NFSERR_BADXDR)
3202 nd->nd_repstat = NFSERR_BADXDR;
3203 else
3204 printf("nfsv4 comperr1=%d\n", error);
3205 }
3206 if (taglen == -1) {
3207 NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
3208 *tl++ = 0;
3209 *tl = 0;
3210 } else {
3211 *retopsp = txdr_unsigned(retops);
3212 }
3213 *nd->nd_errp = nfscl_errmap(nd);
3214 }
3215
3216 /*
3217 * Generate the next cbident value. Basically just increment a static value
3218 * and then check that it isn't already in the list, if it has wrapped around.
3219 */
3220 static u_int32_t
3221 nfscl_nextcbident(void)
3222 {
3223 struct nfsclclient *clp;
3224 int matched;
3225 static u_int32_t nextcbident = 0;
3226 static int haswrapped = 0;
3227
3228 nextcbident++;
3229 if (nextcbident == 0)
3230 haswrapped = 1;
3231 if (haswrapped) {
3232 /*
3233 * Search the clientid list for one already using this cbident.
3234 */
3235 do {
3236 matched = 0;
3237 NFSLOCKCLSTATE();
3238 LIST_FOREACH(clp, &nfsclhead, nfsc_list) {
3239 if (clp->nfsc_cbident == nextcbident) {
3240 matched = 1;
3241 break;
3242 }
3243 }
3244 NFSUNLOCKCLSTATE();
3245 if (matched == 1)
3246 nextcbident++;
3247 } while (matched);
3248 }
3249 return (nextcbident);
3250 }
3251
3252 /*
3253 * Get the mount point related to a given cbident.
3254 */
3255 static mount_t
3256 nfscl_getmnt(u_int32_t cbident)
3257 {
3258 struct nfsclclient *clp;
3259 struct nfsmount *nmp;
3260
3261 NFSLOCKCLSTATE();
3262 LIST_FOREACH(clp, &nfsclhead, nfsc_list) {
3263 if (clp->nfsc_cbident == cbident)
3264 break;
3265 }
3266 if (clp == NULL) {
3267 NFSUNLOCKCLSTATE();
3268 return (NULL);
3269 }
3270 nmp = clp->nfsc_nmp;
3271 NFSUNLOCKCLSTATE();
3272 return (nmp->nm_mountp);
3273 }
3274
3275 /*
3276 * Search for a lock conflict locally on the client. A conflict occurs if
3277 * - not same owner and overlapping byte range and at least one of them is
3278 * a write lock or this is an unlock.
3279 */
3280 static int
3281 nfscl_localconflict(struct nfsclclient *clp, u_int8_t *fhp, int fhlen,
3282 struct nfscllock *nlop, u_int8_t *own, struct nfscldeleg *dp,
3283 struct nfscllock **lopp)
3284 {
3285 struct nfsclowner *owp;
3286 struct nfsclopen *op;
3287 int ret;
3288
3289 if (dp != NULL) {
3290 ret = nfscl_checkconflict(&dp->nfsdl_lock, nlop, own, lopp);
3291 if (ret)
3292 return (ret);
3293 }
3294 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
3295 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
3296 if (op->nfso_fhlen == fhlen &&
3297 !NFSBCMP(op->nfso_fh, fhp, fhlen)) {
3298 ret = nfscl_checkconflict(&op->nfso_lock, nlop,
3299 own, lopp);
3300 if (ret)
3301 return (ret);
3302 }
3303 }
3304 }
3305 return (0);
3306 }
3307
3308 static int
3309 nfscl_checkconflict(struct nfscllockownerhead *lhp, struct nfscllock *nlop,
3310 u_int8_t *own, struct nfscllock **lopp)
3311 {
3312 struct nfscllockowner *lp;
3313 struct nfscllock *lop;
3314
3315 LIST_FOREACH(lp, lhp, nfsl_list) {
3316 if (NFSBCMP(lp->nfsl_owner, own, NFSV4CL_LOCKNAMELEN)) {
3317 LIST_FOREACH(lop, &lp->nfsl_lock, nfslo_list) {
3318 if (lop->nfslo_first >= nlop->nfslo_end)
3319 break;
3320 if (lop->nfslo_end <= nlop->nfslo_first)
3321 continue;
3322 if (lop->nfslo_type == F_WRLCK ||
3323 nlop->nfslo_type == F_WRLCK ||
3324 nlop->nfslo_type == F_UNLCK) {
3325 if (lopp != NULL)
3326 *lopp = lop;
3327 return (NFSERR_DENIED);
3328 }
3329 }
3330 }
3331 }
3332 return (0);
3333 }
3334
3335 /*
3336 * Check for a local conflicting lock.
3337 */
3338 APPLESTATIC int
3339 nfscl_lockt(vnode_t vp, struct nfsclclient *clp, u_int64_t off,
3340 u_int64_t len, struct flock *fl, NFSPROC_T *p, void *id, int flags)
3341 {
3342 struct nfscllock *lop, nlck;
3343 struct nfscldeleg *dp;
3344 struct nfsnode *np;
3345 u_int8_t own[NFSV4CL_LOCKNAMELEN];
3346 int error;
3347
3348 nlck.nfslo_type = fl->l_type;
3349 nlck.nfslo_first = off;
3350 if (len == NFS64BITSSET) {
3351 nlck.nfslo_end = NFS64BITSSET;
3352 } else {
3353 nlck.nfslo_end = off + len;
3354 if (nlck.nfslo_end <= nlck.nfslo_first)
3355 return (NFSERR_INVAL);
3356 }
3357 np = VTONFS(vp);
3358 nfscl_filllockowner(id, own, flags);
3359 NFSLOCKCLSTATE();
3360 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
3361 error = nfscl_localconflict(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len,
3362 &nlck, own, dp, &lop);
3363 if (error != 0) {
3364 fl->l_whence = SEEK_SET;
3365 fl->l_start = lop->nfslo_first;
3366 if (lop->nfslo_end == NFS64BITSSET)
3367 fl->l_len = 0;
3368 else
3369 fl->l_len = lop->nfslo_end - lop->nfslo_first;
3370 fl->l_pid = (pid_t)0;
3371 fl->l_type = lop->nfslo_type;
3372 error = -1; /* no RPC required */
3373 } else if (dp != NULL && ((dp->nfsdl_flags & NFSCLDL_WRITE) ||
3374 fl->l_type == F_RDLCK)) {
3375 /*
3376 * The delegation ensures that there isn't a conflicting
3377 * lock on the server, so return -1 to indicate an RPC
3378 * isn't required.
3379 */
3380 fl->l_type = F_UNLCK;
3381 error = -1;
3382 }
3383 NFSUNLOCKCLSTATE();
3384 return (error);
3385 }
3386
3387 /*
3388 * Handle Recall of a delegation.
3389 * The clp must be exclusive locked when this is called.
3390 */
3391 static int
3392 nfscl_recalldeleg(struct nfsclclient *clp, struct nfsmount *nmp,
3393 struct nfscldeleg *dp, vnode_t vp, struct ucred *cred, NFSPROC_T *p,
3394 int called_from_renewthread)
3395 {
3396 struct nfsclowner *owp, *lowp, *nowp;
3397 struct nfsclopen *op, *lop;
3398 struct nfscllockowner *lp;
3399 struct nfscllock *lckp;
3400 struct nfsnode *np;
3401 int error = 0, ret, gotvp = 0;
3402
3403 if (vp == NULL) {
3404 /*
3405 * First, get a vnode for the file. This is needed to do RPCs.
3406 */
3407 ret = nfscl_ngetreopen(nmp->nm_mountp, dp->nfsdl_fh,
3408 dp->nfsdl_fhlen, p, &np);
3409 if (ret) {
3410 /*
3411 * File isn't open, so nothing to move over to the
3412 * server.
3413 */
3414 return (0);
3415 }
3416 vp = NFSTOV(np);
3417 gotvp = 1;
3418 } else {
3419 np = VTONFS(vp);
3420 }
3421 dp->nfsdl_flags &= ~NFSCLDL_MODTIMESET;
3422
3423 /*
3424 * Ok, if it's a write delegation, flush data to the server, so
3425 * that close/open consistency is retained.
3426 */
3427 ret = 0;
3428 NFSLOCKNODE(np);
3429 if ((dp->nfsdl_flags & NFSCLDL_WRITE) && (np->n_flag & NMODIFIED)) {
3430 np->n_flag |= NDELEGRECALL;
3431 NFSUNLOCKNODE(np);
3432 ret = ncl_flush(vp, MNT_WAIT, cred, p, 1,
3433 called_from_renewthread);
3434 NFSLOCKNODE(np);
3435 np->n_flag &= ~NDELEGRECALL;
3436 }
3437 NFSINVALATTRCACHE(np);
3438 NFSUNLOCKNODE(np);
3439 if (ret == EIO && called_from_renewthread != 0) {
3440 /*
3441 * If the flush failed with EIO for the renew thread,
3442 * return now, so that the dirty buffer will be flushed
3443 * later.
3444 */
3445 if (gotvp != 0)
3446 vrele(vp);
3447 return (ret);
3448 }
3449
3450 /*
3451 * Now, for each openowner with opens issued locally, move them
3452 * over to state against the server.
3453 */
3454 LIST_FOREACH(lowp, &dp->nfsdl_owner, nfsow_list) {
3455 lop = LIST_FIRST(&lowp->nfsow_open);
3456 if (lop != NULL) {
3457 if (LIST_NEXT(lop, nfso_list) != NULL)
3458 panic("nfsdlg mult opens");
3459 /*
3460 * Look for the same openowner against the server.
3461 */
3462 LIST_FOREACH(owp, &clp->nfsc_owner, nfsow_list) {
3463 if (!NFSBCMP(lowp->nfsow_owner,
3464 owp->nfsow_owner, NFSV4CL_LOCKNAMELEN)) {
3465 newnfs_copycred(&dp->nfsdl_cred, cred);
3466 ret = nfscl_moveopen(vp, clp, nmp, lop,
3467 owp, dp, cred, p);
3468 if (ret == NFSERR_STALECLIENTID ||
3469 ret == NFSERR_STALEDONTRECOVER) {
3470 if (gotvp)
3471 vrele(vp);
3472 return (ret);
3473 }
3474 if (ret) {
3475 nfscl_freeopen(lop, 1);
3476 if (!error)
3477 error = ret;
3478 }
3479 break;
3480 }
3481 }
3482
3483 /*
3484 * If no openowner found, create one and get an open
3485 * for it.
3486 */
3487 if (owp == NULL) {
3488 MALLOC(nowp, struct nfsclowner *,
3489 sizeof (struct nfsclowner), M_NFSCLOWNER,
3490 M_WAITOK);
3491 nfscl_newopen(clp, NULL, &owp, &nowp, &op,
3492 NULL, lowp->nfsow_owner, dp->nfsdl_fh,
3493 dp->nfsdl_fhlen, NULL);
3494 newnfs_copycred(&dp->nfsdl_cred, cred);
3495 ret = nfscl_moveopen(vp, clp, nmp, lop,
3496 owp, dp, cred, p);
3497 if (ret) {
3498 nfscl_freeopenowner(owp, 0);
3499 if (ret == NFSERR_STALECLIENTID ||
3500 ret == NFSERR_STALEDONTRECOVER) {
3501 if (gotvp)
3502 vrele(vp);
3503 return (ret);
3504 }
3505 if (ret) {
3506 nfscl_freeopen(lop, 1);
3507 if (!error)
3508 error = ret;
3509 }
3510 }
3511 }
3512 }
3513 }
3514
3515 /*
3516 * Now, get byte range locks for any locks done locally.
3517 */
3518 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) {
3519 LIST_FOREACH(lckp, &lp->nfsl_lock, nfslo_list) {
3520 newnfs_copycred(&dp->nfsdl_cred, cred);
3521 ret = nfscl_relock(vp, clp, nmp, lp, lckp, cred, p);
3522 if (ret == NFSERR_STALESTATEID ||
3523 ret == NFSERR_STALEDONTRECOVER ||
3524 ret == NFSERR_STALECLIENTID) {
3525 if (gotvp)
3526 vrele(vp);
3527 return (ret);
3528 }
3529 if (ret && !error)
3530 error = ret;
3531 }
3532 }
3533 if (gotvp)
3534 vrele(vp);
3535 return (error);
3536 }
3537
3538 /*
3539 * Move a locally issued open over to an owner on the state list.
3540 * SIDE EFFECT: If it needs to sleep (do an rpc), it unlocks clstate and
3541 * returns with it unlocked.
3542 */
3543 static int
3544 nfscl_moveopen(vnode_t vp, struct nfsclclient *clp, struct nfsmount *nmp,
3545 struct nfsclopen *lop, struct nfsclowner *owp, struct nfscldeleg *dp,
3546 struct ucred *cred, NFSPROC_T *p)
3547 {
3548 struct nfsclopen *op, *nop;
3549 struct nfscldeleg *ndp;
3550 struct nfsnode *np;
3551 int error = 0, newone;
3552
3553 /*
3554 * First, look for an appropriate open, If found, just increment the
3555 * opencnt in it.
3556 */
3557 LIST_FOREACH(op, &owp->nfsow_open, nfso_list) {
3558 if ((op->nfso_mode & lop->nfso_mode) == lop->nfso_mode &&
3559 op->nfso_fhlen == lop->nfso_fhlen &&
3560 !NFSBCMP(op->nfso_fh, lop->nfso_fh, op->nfso_fhlen)) {
3561 op->nfso_opencnt += lop->nfso_opencnt;
3562 nfscl_freeopen(lop, 1);
3563 return (0);
3564 }
3565 }
3566
3567 /* No appropriate open, so we have to do one against the server. */
3568 np = VTONFS(vp);
3569 MALLOC(nop, struct nfsclopen *, sizeof (struct nfsclopen) +
3570 lop->nfso_fhlen - 1, M_NFSCLOPEN, M_WAITOK);
3571 newone = 0;
3572 nfscl_newopen(clp, NULL, &owp, NULL, &op, &nop, owp->nfsow_owner,
3573 lop->nfso_fh, lop->nfso_fhlen, &newone);
3574 ndp = dp;
3575 error = nfscl_tryopen(nmp, vp, np->n_v4->n4_data, np->n_v4->n4_fhlen,
3576 lop->nfso_fh, lop->nfso_fhlen, lop->nfso_mode, op,
3577 NFS4NODENAME(np->n_v4), np->n_v4->n4_namelen, &ndp, 0, 0, cred, p);
3578 if (error) {
3579 if (newone)
3580 nfscl_freeopen(op, 0);
3581 } else {
3582 if (newone)
3583 newnfs_copyincred(cred, &op->nfso_cred);
3584 op->nfso_mode |= lop->nfso_mode;
3585 op->nfso_opencnt += lop->nfso_opencnt;
3586 nfscl_freeopen(lop, 1);
3587 }
3588 if (nop != NULL)
3589 FREE((caddr_t)nop, M_NFSCLOPEN);
3590 if (ndp != NULL) {
3591 /*
3592 * What should I do with the returned delegation, since the
3593 * delegation is being recalled? For now, just printf and
3594 * through it away.
3595 */
3596 printf("Moveopen returned deleg\n");
3597 FREE((caddr_t)ndp, M_NFSCLDELEG);
3598 }
3599 return (error);
3600 }
3601
3602 /*
3603 * Recall all delegations on this client.
3604 */
3605 static void
3606 nfscl_totalrecall(struct nfsclclient *clp)
3607 {
3608 struct nfscldeleg *dp;
3609
3610 TAILQ_FOREACH(dp, &clp->nfsc_deleg, nfsdl_list) {
3611 if ((dp->nfsdl_flags & NFSCLDL_DELEGRET) == 0)
3612 dp->nfsdl_flags |= NFSCLDL_RECALL;
3613 }
3614 }
3615
3616 /*
3617 * Relock byte ranges. Called for delegation recall and state expiry.
3618 */
3619 static int
3620 nfscl_relock(vnode_t vp, struct nfsclclient *clp, struct nfsmount *nmp,
3621 struct nfscllockowner *lp, struct nfscllock *lop, struct ucred *cred,
3622 NFSPROC_T *p)
3623 {
3624 struct nfscllockowner *nlp;
3625 struct nfsfh *nfhp;
3626 u_int64_t off, len;
3627 u_int32_t clidrev = 0;
3628 int error, newone, donelocally;
3629
3630 off = lop->nfslo_first;
3631 len = lop->nfslo_end - lop->nfslo_first;
3632 error = nfscl_getbytelock(vp, off, len, lop->nfslo_type, cred, p,
3633 clp, 1, NULL, 0, lp->nfsl_owner, lp->nfsl_openowner, &nlp, &newone,
3634 &donelocally);
3635 if (error || donelocally)
3636 return (error);
3637 if (nmp->nm_clp != NULL)
3638 clidrev = nmp->nm_clp->nfsc_clientidrev;
3639 else
3640 clidrev = 0;
3641 nfhp = VTONFS(vp)->n_fhp;
3642 error = nfscl_trylock(nmp, vp, nfhp->nfh_fh,
3643 nfhp->nfh_len, nlp, newone, 0, off,
3644 len, lop->nfslo_type, cred, p);
3645 if (error)
3646 nfscl_freelockowner(nlp, 0);
3647 return (error);
3648 }
3649
3650 /*
3651 * Called to re-open a file. Basically get a vnode for the file handle
3652 * and then call nfsrpc_openrpc() to do the rest.
3653 */
3654 static int
3655 nfsrpc_reopen(struct nfsmount *nmp, u_int8_t *fhp, int fhlen,
3656 u_int32_t mode, struct nfsclopen *op, struct nfscldeleg **dpp,
3657 struct ucred *cred, NFSPROC_T *p)
3658 {
3659 struct nfsnode *np;
3660 vnode_t vp;
3661 int error;
3662
3663 error = nfscl_ngetreopen(nmp->nm_mountp, fhp, fhlen, p, &np);
3664 if (error)
3665 return (error);
3666 vp = NFSTOV(np);
3667 if (np->n_v4 != NULL) {
3668 error = nfscl_tryopen(nmp, vp, np->n_v4->n4_data,
3669 np->n_v4->n4_fhlen, fhp, fhlen, mode, op,
3670 NFS4NODENAME(np->n_v4), np->n_v4->n4_namelen, dpp, 0, 0,
3671 cred, p);
3672 } else {
3673 error = EINVAL;
3674 }
3675 vrele(vp);
3676 return (error);
3677 }
3678
3679 /*
3680 * Try an open against the server. Just call nfsrpc_openrpc(), retrying while
3681 * NFSERR_DELAY. Also, try system credentials, if the passed in credentials
3682 * fail.
3683 */
3684 static int
3685 nfscl_tryopen(struct nfsmount *nmp, vnode_t vp, u_int8_t *fhp, int fhlen,
3686 u_int8_t *newfhp, int newfhlen, u_int32_t mode, struct nfsclopen *op,
3687 u_int8_t *name, int namelen, struct nfscldeleg **ndpp,
3688 int reclaim, u_int32_t delegtype, struct ucred *cred, NFSPROC_T *p)
3689 {
3690 int error;
3691
3692 do {
3693 error = nfsrpc_openrpc(nmp, vp, fhp, fhlen, newfhp, newfhlen,
3694 mode, op, name, namelen, ndpp, reclaim, delegtype, cred, p,
3695 0, 0);
3696 if (error == NFSERR_DELAY)
3697 (void) nfs_catnap(PZERO, error, "nfstryop");
3698 } while (error == NFSERR_DELAY);
3699 if (error == EAUTH || error == EACCES) {
3700 /* Try again using system credentials */
3701 newnfs_setroot(cred);
3702 do {
3703 error = nfsrpc_openrpc(nmp, vp, fhp, fhlen, newfhp,
3704 newfhlen, mode, op, name, namelen, ndpp, reclaim,
3705 delegtype, cred, p, 1, 0);
3706 if (error == NFSERR_DELAY)
3707 (void) nfs_catnap(PZERO, error, "nfstryop");
3708 } while (error == NFSERR_DELAY);
3709 }
3710 return (error);
3711 }
3712
3713 /*
3714 * Try a byte range lock. Just loop on nfsrpc_lock() while it returns
3715 * NFSERR_DELAY. Also, retry with system credentials, if the provided
3716 * cred don't work.
3717 */
3718 static int
3719 nfscl_trylock(struct nfsmount *nmp, vnode_t vp, u_int8_t *fhp,
3720 int fhlen, struct nfscllockowner *nlp, int newone, int reclaim,
3721 u_int64_t off, u_int64_t len, short type, struct ucred *cred, NFSPROC_T *p)
3722 {
3723 struct nfsrv_descript nfsd, *nd = &nfsd;
3724 int error;
3725
3726 do {
3727 error = nfsrpc_lock(nd, nmp, vp, fhp, fhlen, nlp, newone,
3728 reclaim, off, len, type, cred, p, 0);
3729 if (!error && nd->nd_repstat == NFSERR_DELAY)
3730 (void) nfs_catnap(PZERO, (int)nd->nd_repstat,
3731 "nfstrylck");
3732 } while (!error && nd->nd_repstat == NFSERR_DELAY);
3733 if (!error)
3734 error = nd->nd_repstat;
3735 if (error == EAUTH || error == EACCES) {
3736 /* Try again using root credentials */
3737 newnfs_setroot(cred);
3738 do {
3739 error = nfsrpc_lock(nd, nmp, vp, fhp, fhlen, nlp,
3740 newone, reclaim, off, len, type, cred, p, 1);
3741 if (!error && nd->nd_repstat == NFSERR_DELAY)
3742 (void) nfs_catnap(PZERO, (int)nd->nd_repstat,
3743 "nfstrylck");
3744 } while (!error && nd->nd_repstat == NFSERR_DELAY);
3745 if (!error)
3746 error = nd->nd_repstat;
3747 }
3748 return (error);
3749 }
3750
3751 /*
3752 * Try a delegreturn against the server. Just call nfsrpc_delegreturn(),
3753 * retrying while NFSERR_DELAY. Also, try system credentials, if the passed in
3754 * credentials fail.
3755 */
3756 static int
3757 nfscl_trydelegreturn(struct nfscldeleg *dp, struct ucred *cred,
3758 struct nfsmount *nmp, NFSPROC_T *p)
3759 {
3760 int error;
3761
3762 do {
3763 error = nfsrpc_delegreturn(dp, cred, nmp, p, 0);
3764 if (error == NFSERR_DELAY)
3765 (void) nfs_catnap(PZERO, error, "nfstrydp");
3766 } while (error == NFSERR_DELAY);
3767 if (error == EAUTH || error == EACCES) {
3768 /* Try again using system credentials */
3769 newnfs_setroot(cred);
3770 do {
3771 error = nfsrpc_delegreturn(dp, cred, nmp, p, 1);
3772 if (error == NFSERR_DELAY)
3773 (void) nfs_catnap(PZERO, error, "nfstrydp");
3774 } while (error == NFSERR_DELAY);
3775 }
3776 return (error);
3777 }
3778
3779 /*
3780 * Try a close against the server. Just call nfsrpc_closerpc(),
3781 * retrying while NFSERR_DELAY. Also, try system credentials, if the passed in
3782 * credentials fail.
3783 */
3784 APPLESTATIC int
3785 nfscl_tryclose(struct nfsclopen *op, struct ucred *cred,
3786 struct nfsmount *nmp, NFSPROC_T *p)
3787 {
3788 struct nfsrv_descript nfsd, *nd = &nfsd;
3789 int error;
3790
3791 do {
3792 error = nfsrpc_closerpc(nd, nmp, op, cred, p, 0);
3793 if (error == NFSERR_DELAY)
3794 (void) nfs_catnap(PZERO, error, "nfstrycl");
3795 } while (error == NFSERR_DELAY);
3796 if (error == EAUTH || error == EACCES) {
3797 /* Try again using system credentials */
3798 newnfs_setroot(cred);
3799 do {
3800 error = nfsrpc_closerpc(nd, nmp, op, cred, p, 1);
3801 if (error == NFSERR_DELAY)
3802 (void) nfs_catnap(PZERO, error, "nfstrycl");
3803 } while (error == NFSERR_DELAY);
3804 }
3805 return (error);
3806 }
3807
3808 /*
3809 * Decide if a delegation on a file permits close without flushing writes
3810 * to the server. This might be a big performance win in some environments.
3811 * (Not useful until the client does caching on local stable storage.)
3812 */
3813 APPLESTATIC int
3814 nfscl_mustflush(vnode_t vp)
3815 {
3816 struct nfsclclient *clp;
3817 struct nfscldeleg *dp;
3818 struct nfsnode *np;
3819 struct nfsmount *nmp;
3820
3821 np = VTONFS(vp);
3822 nmp = VFSTONFS(vnode_mount(vp));
3823 if (!NFSHASNFSV4(nmp))
3824 return (1);
3825 NFSLOCKCLSTATE();
3826 clp = nfscl_findcl(nmp);
3827 if (clp == NULL) {
3828 NFSUNLOCKCLSTATE();
3829 return (1);
3830 }
3831 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
3832 if (dp != NULL && (dp->nfsdl_flags &
3833 (NFSCLDL_WRITE | NFSCLDL_RECALL | NFSCLDL_DELEGRET)) ==
3834 NFSCLDL_WRITE &&
3835 (dp->nfsdl_sizelimit >= np->n_size ||
3836 !NFSHASSTRICT3530(nmp))) {
3837 NFSUNLOCKCLSTATE();
3838 return (0);
3839 }
3840 NFSUNLOCKCLSTATE();
3841 return (1);
3842 }
3843
3844 /*
3845 * See if a (write) delegation exists for this file.
3846 */
3847 APPLESTATIC int
3848 nfscl_nodeleg(vnode_t vp, int writedeleg)
3849 {
3850 struct nfsclclient *clp;
3851 struct nfscldeleg *dp;
3852 struct nfsnode *np;
3853 struct nfsmount *nmp;
3854
3855 np = VTONFS(vp);
3856 nmp = VFSTONFS(vnode_mount(vp));
3857 if (!NFSHASNFSV4(nmp))
3858 return (1);
3859 NFSLOCKCLSTATE();
3860 clp = nfscl_findcl(nmp);
3861 if (clp == NULL) {
3862 NFSUNLOCKCLSTATE();
3863 return (1);
3864 }
3865 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
3866 if (dp != NULL &&
3867 (dp->nfsdl_flags & (NFSCLDL_RECALL | NFSCLDL_DELEGRET)) == 0 &&
3868 (writedeleg == 0 || (dp->nfsdl_flags & NFSCLDL_WRITE) ==
3869 NFSCLDL_WRITE)) {
3870 NFSUNLOCKCLSTATE();
3871 return (0);
3872 }
3873 NFSUNLOCKCLSTATE();
3874 return (1);
3875 }
3876
3877 /*
3878 * Look for an associated delegation that should be DelegReturned.
3879 */
3880 APPLESTATIC int
3881 nfscl_removedeleg(vnode_t vp, NFSPROC_T *p, nfsv4stateid_t *stp)
3882 {
3883 struct nfsclclient *clp;
3884 struct nfscldeleg *dp;
3885 struct nfsclowner *owp;
3886 struct nfscllockowner *lp;
3887 struct nfsmount *nmp;
3888 struct ucred *cred;
3889 struct nfsnode *np;
3890 int igotlock = 0, triedrecall = 0, needsrecall, retcnt = 0, islept;
3891
3892 nmp = VFSTONFS(vnode_mount(vp));
3893 np = VTONFS(vp);
3894 NFSLOCKCLSTATE();
3895 /*
3896 * Loop around waiting for:
3897 * - outstanding I/O operations on delegations to complete
3898 * - for a delegation on vp that has state, lock the client and
3899 * do a recall
3900 * - return delegation with no state
3901 */
3902 while (1) {
3903 clp = nfscl_findcl(nmp);
3904 if (clp == NULL) {
3905 NFSUNLOCKCLSTATE();
3906 return (retcnt);
3907 }
3908 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh,
3909 np->n_fhp->nfh_len);
3910 if (dp != NULL) {
3911 /*
3912 * Wait for outstanding I/O ops to be done.
3913 */
3914 if (dp->nfsdl_rwlock.nfslock_usecnt > 0) {
3915 if (igotlock) {
3916 nfsv4_unlock(&clp->nfsc_lock, 0);
3917 igotlock = 0;
3918 }
3919 dp->nfsdl_rwlock.nfslock_lock |= NFSV4LOCK_WANTED;
3920 (void) nfsmsleep(&dp->nfsdl_rwlock,
3921 NFSCLSTATEMUTEXPTR, PZERO, "nfscld", NULL);
3922 continue;
3923 }
3924 needsrecall = 0;
3925 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) {
3926 if (!LIST_EMPTY(&owp->nfsow_open)) {
3927 needsrecall = 1;
3928 break;
3929 }
3930 }
3931 if (!needsrecall) {
3932 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) {
3933 if (!LIST_EMPTY(&lp->nfsl_lock)) {
3934 needsrecall = 1;
3935 break;
3936 }
3937 }
3938 }
3939 if (needsrecall && !triedrecall) {
3940 dp->nfsdl_flags |= NFSCLDL_DELEGRET;
3941 islept = 0;
3942 while (!igotlock) {
3943 igotlock = nfsv4_lock(&clp->nfsc_lock, 1,
3944 &islept, NFSCLSTATEMUTEXPTR, NULL);
3945 if (islept)
3946 break;
3947 }
3948 if (islept)
3949 continue;
3950 NFSUNLOCKCLSTATE();
3951 cred = newnfs_getcred();
3952 newnfs_copycred(&dp->nfsdl_cred, cred);
3953 (void) nfscl_recalldeleg(clp, nmp, dp, vp, cred, p, 0);
3954 NFSFREECRED(cred);
3955 triedrecall = 1;
3956 NFSLOCKCLSTATE();
3957 nfsv4_unlock(&clp->nfsc_lock, 0);
3958 igotlock = 0;
3959 continue;
3960 }
3961 *stp = dp->nfsdl_stateid;
3962 retcnt = 1;
3963 nfscl_cleandeleg(dp);
3964 nfscl_freedeleg(&clp->nfsc_deleg, dp);
3965 }
3966 if (igotlock)
3967 nfsv4_unlock(&clp->nfsc_lock, 0);
3968 NFSUNLOCKCLSTATE();
3969 return (retcnt);
3970 }
3971 }
3972
3973 /*
3974 * Look for associated delegation(s) that should be DelegReturned.
3975 */
3976 APPLESTATIC int
3977 nfscl_renamedeleg(vnode_t fvp, nfsv4stateid_t *fstp, int *gotfdp, vnode_t tvp,
3978 nfsv4stateid_t *tstp, int *gottdp, NFSPROC_T *p)
3979 {
3980 struct nfsclclient *clp;
3981 struct nfscldeleg *dp;
3982 struct nfsclowner *owp;
3983 struct nfscllockowner *lp;
3984 struct nfsmount *nmp;
3985 struct ucred *cred;
3986 struct nfsnode *np;
3987 int igotlock = 0, triedrecall = 0, needsrecall, retcnt = 0, islept;
3988
3989 nmp = VFSTONFS(vnode_mount(fvp));
3990 *gotfdp = 0;
3991 *gottdp = 0;
3992 NFSLOCKCLSTATE();
3993 /*
3994 * Loop around waiting for:
3995 * - outstanding I/O operations on delegations to complete
3996 * - for a delegation on fvp that has state, lock the client and
3997 * do a recall
3998 * - return delegation(s) with no state.
3999 */
4000 while (1) {
4001 clp = nfscl_findcl(nmp);
4002 if (clp == NULL) {
4003 NFSUNLOCKCLSTATE();
4004 return (retcnt);
4005 }
4006 np = VTONFS(fvp);
4007 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh,
4008 np->n_fhp->nfh_len);
4009 if (dp != NULL && *gotfdp == 0) {
4010 /*
4011 * Wait for outstanding I/O ops to be done.
4012 */
4013 if (dp->nfsdl_rwlock.nfslock_usecnt > 0) {
4014 if (igotlock) {
4015 nfsv4_unlock(&clp->nfsc_lock, 0);
4016 igotlock = 0;
4017 }
4018 dp->nfsdl_rwlock.nfslock_lock |= NFSV4LOCK_WANTED;
4019 (void) nfsmsleep(&dp->nfsdl_rwlock,
4020 NFSCLSTATEMUTEXPTR, PZERO, "nfscld", NULL);
4021 continue;
4022 }
4023 needsrecall = 0;
4024 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) {
4025 if (!LIST_EMPTY(&owp->nfsow_open)) {
4026 needsrecall = 1;
4027 break;
4028 }
4029 }
4030 if (!needsrecall) {
4031 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) {
4032 if (!LIST_EMPTY(&lp->nfsl_lock)) {
4033 needsrecall = 1;
4034 break;
4035 }
4036 }
4037 }
4038 if (needsrecall && !triedrecall) {
4039 dp->nfsdl_flags |= NFSCLDL_DELEGRET;
4040 islept = 0;
4041 while (!igotlock) {
4042 igotlock = nfsv4_lock(&clp->nfsc_lock, 1,
4043 &islept, NFSCLSTATEMUTEXPTR, NULL);
4044 if (islept)
4045 break;
4046 }
4047 if (islept)
4048 continue;
4049 NFSUNLOCKCLSTATE();
4050 cred = newnfs_getcred();
4051 newnfs_copycred(&dp->nfsdl_cred, cred);
4052 (void) nfscl_recalldeleg(clp, nmp, dp, fvp, cred, p, 0);
4053 NFSFREECRED(cred);
4054 triedrecall = 1;
4055 NFSLOCKCLSTATE();
4056 nfsv4_unlock(&clp->nfsc_lock, 0);
4057 igotlock = 0;
4058 continue;
4059 }
4060 *fstp = dp->nfsdl_stateid;
4061 retcnt++;
4062 *gotfdp = 1;
4063 nfscl_cleandeleg(dp);
4064 nfscl_freedeleg(&clp->nfsc_deleg, dp);
4065 }
4066 if (igotlock) {
4067 nfsv4_unlock(&clp->nfsc_lock, 0);
4068 igotlock = 0;
4069 }
4070 if (tvp != NULL) {
4071 np = VTONFS(tvp);
4072 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh,
4073 np->n_fhp->nfh_len);
4074 if (dp != NULL && *gottdp == 0) {
4075 /*
4076 * Wait for outstanding I/O ops to be done.
4077 */
4078 if (dp->nfsdl_rwlock.nfslock_usecnt > 0) {
4079 dp->nfsdl_rwlock.nfslock_lock |= NFSV4LOCK_WANTED;
4080 (void) nfsmsleep(&dp->nfsdl_rwlock,
4081 NFSCLSTATEMUTEXPTR, PZERO, "nfscld", NULL);
4082 continue;
4083 }
4084 LIST_FOREACH(owp, &dp->nfsdl_owner, nfsow_list) {
4085 if (!LIST_EMPTY(&owp->nfsow_open)) {
4086 NFSUNLOCKCLSTATE();
4087 return (retcnt);
4088 }
4089 }
4090 LIST_FOREACH(lp, &dp->nfsdl_lock, nfsl_list) {
4091 if (!LIST_EMPTY(&lp->nfsl_lock)) {
4092 NFSUNLOCKCLSTATE();
4093 return (retcnt);
4094 }
4095 }
4096 *tstp = dp->nfsdl_stateid;
4097 retcnt++;
4098 *gottdp = 1;
4099 nfscl_cleandeleg(dp);
4100 nfscl_freedeleg(&clp->nfsc_deleg, dp);
4101 }
4102 }
4103 NFSUNLOCKCLSTATE();
4104 return (retcnt);
4105 }
4106 }
4107
4108 /*
4109 * Get a reference on the clientid associated with the mount point.
4110 * Return 1 if success, 0 otherwise.
4111 */
4112 APPLESTATIC int
4113 nfscl_getref(struct nfsmount *nmp)
4114 {
4115 struct nfsclclient *clp;
4116
4117 NFSLOCKCLSTATE();
4118 clp = nfscl_findcl(nmp);
4119 if (clp == NULL) {
4120 NFSUNLOCKCLSTATE();
4121 return (0);
4122 }
4123 nfsv4_getref(&clp->nfsc_lock, NULL, NFSCLSTATEMUTEXPTR, NULL);
4124 NFSUNLOCKCLSTATE();
4125 return (1);
4126 }
4127
4128 /*
4129 * Release a reference on a clientid acquired with the above call.
4130 */
4131 APPLESTATIC void
4132 nfscl_relref(struct nfsmount *nmp)
4133 {
4134 struct nfsclclient *clp;
4135
4136 NFSLOCKCLSTATE();
4137 clp = nfscl_findcl(nmp);
4138 if (clp == NULL) {
4139 NFSUNLOCKCLSTATE();
4140 return;
4141 }
4142 nfsv4_relref(&clp->nfsc_lock);
4143 NFSUNLOCKCLSTATE();
4144 }
4145
4146 /*
4147 * Save the size attribute in the delegation, since the nfsnode
4148 * is going away.
4149 */
4150 APPLESTATIC void
4151 nfscl_reclaimnode(vnode_t vp)
4152 {
4153 struct nfsclclient *clp;
4154 struct nfscldeleg *dp;
4155 struct nfsnode *np = VTONFS(vp);
4156 struct nfsmount *nmp;
4157
4158 nmp = VFSTONFS(vnode_mount(vp));
4159 if (!NFSHASNFSV4(nmp))
4160 return;
4161 NFSLOCKCLSTATE();
4162 clp = nfscl_findcl(nmp);
4163 if (clp == NULL) {
4164 NFSUNLOCKCLSTATE();
4165 return;
4166 }
4167 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
4168 if (dp != NULL && (dp->nfsdl_flags & NFSCLDL_WRITE))
4169 dp->nfsdl_size = np->n_size;
4170 NFSUNLOCKCLSTATE();
4171 }
4172
4173 /*
4174 * Get the saved size attribute in the delegation, since it is a
4175 * newly allocated nfsnode.
4176 */
4177 APPLESTATIC void
4178 nfscl_newnode(vnode_t vp)
4179 {
4180 struct nfsclclient *clp;
4181 struct nfscldeleg *dp;
4182 struct nfsnode *np = VTONFS(vp);
4183 struct nfsmount *nmp;
4184
4185 nmp = VFSTONFS(vnode_mount(vp));
4186 if (!NFSHASNFSV4(nmp))
4187 return;
4188 NFSLOCKCLSTATE();
4189 clp = nfscl_findcl(nmp);
4190 if (clp == NULL) {
4191 NFSUNLOCKCLSTATE();
4192 return;
4193 }
4194 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
4195 if (dp != NULL && (dp->nfsdl_flags & NFSCLDL_WRITE))
4196 np->n_size = dp->nfsdl_size;
4197 NFSUNLOCKCLSTATE();
4198 }
4199
4200 /*
4201 * If there is a valid write delegation for this file, set the modtime
4202 * to the local clock time.
4203 */
4204 APPLESTATIC void
4205 nfscl_delegmodtime(vnode_t vp)
4206 {
4207 struct nfsclclient *clp;
4208 struct nfscldeleg *dp;
4209 struct nfsnode *np = VTONFS(vp);
4210 struct nfsmount *nmp;
4211
4212 nmp = VFSTONFS(vnode_mount(vp));
4213 if (!NFSHASNFSV4(nmp))
4214 return;
4215 NFSLOCKCLSTATE();
4216 clp = nfscl_findcl(nmp);
4217 if (clp == NULL) {
4218 NFSUNLOCKCLSTATE();
4219 return;
4220 }
4221 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
4222 if (dp != NULL && (dp->nfsdl_flags & NFSCLDL_WRITE)) {
4223 NFSGETNANOTIME(&dp->nfsdl_modtime);
4224 dp->nfsdl_flags |= NFSCLDL_MODTIMESET;
4225 }
4226 NFSUNLOCKCLSTATE();
4227 }
4228
4229 /*
4230 * If there is a valid write delegation for this file with a modtime set,
4231 * put that modtime in mtime.
4232 */
4233 APPLESTATIC void
4234 nfscl_deleggetmodtime(vnode_t vp, struct timespec *mtime)
4235 {
4236 struct nfsclclient *clp;
4237 struct nfscldeleg *dp;
4238 struct nfsnode *np = VTONFS(vp);
4239 struct nfsmount *nmp;
4240
4241 nmp = VFSTONFS(vnode_mount(vp));
4242 if (!NFSHASNFSV4(nmp))
4243 return;
4244 NFSLOCKCLSTATE();
4245 clp = nfscl_findcl(nmp);
4246 if (clp == NULL) {
4247 NFSUNLOCKCLSTATE();
4248 return;
4249 }
4250 dp = nfscl_finddeleg(clp, np->n_fhp->nfh_fh, np->n_fhp->nfh_len);
4251 if (dp != NULL &&
4252 (dp->nfsdl_flags & (NFSCLDL_WRITE | NFSCLDL_MODTIMESET)) ==
4253 (NFSCLDL_WRITE | NFSCLDL_MODTIMESET))
4254 *mtime = dp->nfsdl_modtime;
4255 NFSUNLOCKCLSTATE();
4256 }
4257
4258 static int
4259 nfscl_errmap(struct nfsrv_descript *nd)
4260 {
4261 short *defaulterrp, *errp;
4262
4263 if (!nd->nd_repstat)
4264 return (0);
4265 if (nd->nd_procnum == NFSPROC_NOOP)
4266 return (txdr_unsigned(nd->nd_repstat & 0xffff));
4267 if (nd->nd_repstat == EBADRPC)
4268 return (txdr_unsigned(NFSERR_BADXDR));
4269 if (nd->nd_repstat == NFSERR_MINORVERMISMATCH ||
4270 nd->nd_repstat == NFSERR_OPILLEGAL)
4271 return (txdr_unsigned(nd->nd_repstat));
4272 errp = defaulterrp = nfscl_cberrmap[nd->nd_procnum];
4273 while (*++errp)
4274 if (*errp == (short)nd->nd_repstat)
4275 return (txdr_unsigned(nd->nd_repstat));
4276 return (txdr_unsigned(*defaulterrp));
4277 }
4278
Cache object: 3395cce0e2775c217487aee6454595f1
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